drivers/net/s2io.c

   1 /************************************************************************
   2  * s2io.c: A Linux PCI-X Ethernet driver for Neterion 10GbE Server NIC
   3  * Copyright(c) 2002-2005 Neterion Inc.
   4
   5  * This software may be used and distributed according to the terms of
   6  * the GNU General Public License (GPL), incorporated herein by reference.
   7  * Drivers based on or derived from this code fall under the GPL and must
   8  * retain the authorship, copyright and license notice.  This file is not
   9  * a complete program and may only be used when the entire operating
  10  * system is licensed under the GPL.
  11  * See the file COPYING in this distribution for more information.
  12  *
  13  * Credits:
  14  * Jeff Garzik          : For pointing out the improper error condition
  15  *                        check in the s2io_xmit routine and also some
  16  *                        issues in the Tx watch dog function. Also for
  17  *                        patiently answering all those innumerable
  18  *                        questions regaring the 2.6 porting issues.
  19  * Stephen Hemminger    : Providing proper 2.6 porting mechanism for some
  20  *                        macros available only in 2.6 Kernel.
  21  * Francois Romieu      : For pointing out all code part that were
  22  *                        deprecated and also styling related comments.
  23  * Grant Grundler       : For helping me get rid of some Architecture
  24  *                        dependent code.
  25  * Christopher Hellwig  : Some more 2.6 specific issues in the driver.
  26  *
  27  * The module loadable parameters that are supported by the driver and a brief
  28  * explaination of all the variables.
  29  *
  30  * rx_ring_num : This can be used to program the number of receive rings used
  31  * in the driver.
  32  * rx_ring_sz: This defines the number of receive blocks each ring can have.
  33  *     This is also an array of size 8.
  34  * rx_ring_mode: This defines the operation mode of all 8 rings. The valid
  35  *              values are 1, 2 and 3.
  36  * tx_fifo_num: This defines the number of Tx FIFOs thats used int the driver.
  37  * tx_fifo_len: This too is an array of 8. Each element defines the number of
  38  * Tx descriptors that can be associated with each corresponding FIFO.
  39  * intr_type: This defines the type of interrupt. The values can be 0(INTA),
  40  *     1(MSI), 2(MSI_X). Default value is '0(INTA)'
  41  * lro: Specifies whether to enable Large Receive Offload (LRO) or not.
  42  *     Possible values '1' for enable '0' for disable. Default is '0'
  43  * lro_max_pkts: This parameter defines maximum number of packets can be
  44  *     aggregated as a single large packet
  45  ************************************************************************/
  46
  47 #include <linux/module.h>
  48 #include <linux/types.h>
  49 #include <linux/errno.h>
  50 #include <linux/ioport.h>
  51 #include <linux/pci.h>
  52 #include <linux/dma-mapping.h>
  53 #include <linux/kernel.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/etherdevice.h>
  56 #include <linux/skbuff.h>
  57 #include <linux/init.h>
  58 #include <linux/delay.h>
  59 #include <linux/stddef.h>
  60 #include <linux/ioctl.h>
  61 #include <linux/timex.h>
  62 #include <linux/ethtool.h>
  63 #include <linux/workqueue.h>
  64 #include <linux/if_vlan.h>
  65 #include <linux/ip.h>
  66 #include <linux/tcp.h>
  67 #include <net/tcp.h>
  68
  69 #include <asm/system.h>
  70 #include <asm/uaccess.h>
  71 #include <asm/io.h>
  72 #include <asm/div64.h>
  73 #include <asm/irq.h>
  74
  75 /* local include */
  76 #include "s2io.h"
  77 #include "s2io-regs.h"
  78
  79 #define DRV_VERSION "2.0.16.1"
  80
  81 /* S2io Driver name & version. */
  82 static char s2io_driver_name[] = "Neterion";
  83 static char s2io_driver_version[] = DRV_VERSION;
  84
  85 static int rxd_size[4] = {32,48,48,64};
  86 static int rxd_count[4] = {127,85,85,63};
  87
  88 static inline int RXD_IS_UP2DT(struct RxD_t *rxdp)
  89 {
  90         int ret;
  91
  92         ret = ((!(rxdp->Control_1 & RXD_OWN_XENA)) &&
  93                 (GET_RXD_MARKER(rxdp->Control_2) != THE_RXD_MARK));
  94
  95         return ret;
  96 }
  97
  98 /*
  99  * Cards with following subsystem_id have a link state indication
 100  * problem, 600B, 600C, 600D, 640B, 640C and 640D.
 101  * macro below identifies these cards given the subsystem_id.
 102  */
 103 #define CARDS_WITH_FAULTY_LINK_INDICATORS(dev_type, subid) \
 104         (dev_type == XFRAME_I_DEVICE) ?                 \
 105                 ((((subid >= 0x600B) && (subid <= 0x600D)) || \
 106                  ((subid >= 0x640B) && (subid <= 0x640D))) ? 1 : 0) : 0
 107
 108 #define LINK_IS_UP(val64) (!(val64 & (ADAPTER_STATUS_RMAC_REMOTE_FAULT | \
 109                                       ADAPTER_STATUS_RMAC_LOCAL_FAULT)))
 110 #define TASKLET_IN_USE test_and_set_bit(0, (&sp->tasklet_status))
 111 #define PANIC   1
 112 #define LOW     2
 113 static inline int rx_buffer_level(struct s2io_nic * sp, int rxb_size, int ring)
 114 {
 115         struct mac_info *mac_control;
 116
 117         mac_control = &sp->mac_control;
 118         if (rxb_size <= rxd_count[sp->rxd_mode])
 119                 return PANIC;
 120         else if ((mac_control->rings[ring].pkt_cnt - rxb_size) > 16)
 121                 return  LOW;
 122         return 0;
 123 }
 124
 125 /* Ethtool related variables and Macros. */
 126 static char s2io_gstrings[][ETH_GSTRING_LEN] = {
 127         "Register test\t(offline)",
 128         "Eeprom test\t(offline)",
 129         "Link test\t(online)",
 130         "RLDRAM test\t(offline)",
 131         "BIST Test\t(offline)"
 132 };
 133
 134 static char ethtool_stats_keys[][ETH_GSTRING_LEN] = {
 135         {"tmac_frms"},
 136         {"tmac_data_octets"},
 137         {"tmac_drop_frms"},
 138         {"tmac_mcst_frms"},
 139         {"tmac_bcst_frms"},
 140         {"tmac_pause_ctrl_frms"},
 141         {"tmac_ttl_octets"},
 142         {"tmac_ucst_frms"},
 143         {"tmac_nucst_frms"},
 144         {"tmac_any_err_frms"},
 145         {"tmac_ttl_less_fb_octets"},
 146         {"tmac_vld_ip_octets"},
 147         {"tmac_vld_ip"},
 148         {"tmac_drop_ip"},
 149         {"tmac_icmp"},
 150         {"tmac_rst_tcp"},
 151         {"tmac_tcp"},
 152         {"tmac_udp"},
 153         {"rmac_vld_frms"},
 154         {"rmac_data_octets"},
 155         {"rmac_fcs_err_frms"},
 156         {"rmac_drop_frms"},
 157         {"rmac_vld_mcst_frms"},
 158         {"rmac_vld_bcst_frms"},
 159         {"rmac_in_rng_len_err_frms"},
 160         {"rmac_out_rng_len_err_frms"},
 161         {"rmac_long_frms"},
 162         {"rmac_pause_ctrl_frms"},
 163         {"rmac_unsup_ctrl_frms"},
 164         {"rmac_ttl_octets"},
 165         {"rmac_accepted_ucst_frms"},
 166         {"rmac_accepted_nucst_frms"},
 167         {"rmac_discarded_frms"},
 168         {"rmac_drop_events"},
 169         {"rmac_ttl_less_fb_octets"},
 170         {"rmac_ttl_frms"},
 171         {"rmac_usized_frms"},
 172         {"rmac_osized_frms"},
 173         {"rmac_frag_frms"},
 174         {"rmac_jabber_frms"},
 175         {"rmac_ttl_64_frms"},
 176         {"rmac_ttl_65_127_frms"},
 177         {"rmac_ttl_128_255_frms"},
 178         {"rmac_ttl_256_511_frms"},
 179         {"rmac_ttl_512_1023_frms"},
 180         {"rmac_ttl_1024_1518_frms"},
 181         {"rmac_ip"},
 182         {"rmac_ip_octets"},
 183         {"rmac_hdr_err_ip"},
 184         {"rmac_drop_ip"},
 185         {"rmac_icmp"},
 186         {"rmac_tcp"},
 187         {"rmac_udp"},
 188         {"rmac_err_drp_udp"},
 189         {"rmac_xgmii_err_sym"},
 190         {"rmac_frms_q0"},
 191         {"rmac_frms_q1"},
 192         {"rmac_frms_q2"},
 193         {"rmac_frms_q3"},
 194         {"rmac_frms_q4"},
 195         {"rmac_frms_q5"},
 196         {"rmac_frms_q6"},
 197         {"rmac_frms_q7"},
 198         {"rmac_full_q0"},
 199         {"rmac_full_q1"},
 200         {"rmac_full_q2"},
 201         {"rmac_full_q3"},
 202         {"rmac_full_q4"},
 203         {"rmac_full_q5"},
 204         {"rmac_full_q6"},
 205         {"rmac_full_q7"},
 206         {"rmac_pause_cnt"},
 207         {"rmac_xgmii_data_err_cnt"},
 208         {"rmac_xgmii_ctrl_err_cnt"},
 209         {"rmac_accepted_ip"},
 210         {"rmac_err_tcp"},
 211         {"rd_req_cnt"},
 212         {"new_rd_req_cnt"},
 213         {"new_rd_req_rtry_cnt"},
 214         {"rd_rtry_cnt"},
 215         {"wr_rtry_rd_ack_cnt"},
 216         {"wr_req_cnt"},
 217         {"new_wr_req_cnt"},
 218         {"new_wr_req_rtry_cnt"},
 219         {"wr_rtry_cnt"},
 220         {"wr_disc_cnt"},
 221         {"rd_rtry_wr_ack_cnt"},
 222         {"txp_wr_cnt"},
 223         {"txd_rd_cnt"},
 224         {"txd_wr_cnt"},
 225         {"rxd_rd_cnt"},
 226         {"rxd_wr_cnt"},
 227         {"txf_rd_cnt"},
 228         {"rxf_wr_cnt"},
 229         {"rmac_ttl_1519_4095_frms"},
 230         {"rmac_ttl_4096_8191_frms"},
 231         {"rmac_ttl_8192_max_frms"},
 232         {"rmac_ttl_gt_max_frms"},
 233         {"rmac_osized_alt_frms"},
 234         {"rmac_jabber_alt_frms"},
 235         {"rmac_gt_max_alt_frms"},
 236         {"rmac_vlan_frms"},
 237         {"rmac_len_discard"},
 238         {"rmac_fcs_discard"},
 239         {"rmac_pf_discard"},
 240         {"rmac_da_discard"},
 241         {"rmac_red_discard"},
 242         {"rmac_rts_discard"},
 243         {"rmac_ingm_full_discard"},
 244         {"link_fault_cnt"},
 245         {"\n DRIVER STATISTICS"},
 246         {"single_bit_ecc_errs"},
 247         {"double_bit_ecc_errs"},
 248         {"parity_err_cnt"},
 249         {"serious_err_cnt"},
 250         {"soft_reset_cnt"},
 251         {"fifo_full_cnt"},
 252         {"ring_full_cnt"},
 253         ("alarm_transceiver_temp_high"),
 254         ("alarm_transceiver_temp_low"),
 255         ("alarm_laser_bias_current_high"),
 256         ("alarm_laser_bias_current_low"),
 257         ("alarm_laser_output_power_high"),
 258         ("alarm_laser_output_power_low"),
 259         ("warn_transceiver_temp_high"),
 260         ("warn_transceiver_temp_low"),
 261         ("warn_laser_bias_current_high"),
 262         ("warn_laser_bias_current_low"),
 263         ("warn_laser_output_power_high"),
 264         ("warn_laser_output_power_low"),
 265         ("lro_aggregated_pkts"),
 266         ("lro_flush_both_count"),
 267         ("lro_out_of_sequence_pkts"),
 268         ("lro_flush_due_to_max_pkts"),
 269         ("lro_avg_aggr_pkts"),
 270 };
 271
 272 #define S2IO_STAT_LEN sizeof(ethtool_stats_keys)/ ETH_GSTRING_LEN
 273 #define S2IO_STAT_STRINGS_LEN S2IO_STAT_LEN * ETH_GSTRING_LEN
 274
 275 #define S2IO_TEST_LEN   sizeof(s2io_gstrings) / ETH_GSTRING_LEN
 276 #define S2IO_STRINGS_LEN        S2IO_TEST_LEN * ETH_GSTRING_LEN
 277
 278 #define S2IO_TIMER_CONF(timer, handle, arg, exp)                \
 279                         init_timer(&timer);                     \
 280                         timer.function = handle;                \
 281                         timer.data = (unsigned long) arg;       \
 282                         mod_timer(&timer, (jiffies + exp))      \
 283
 284 /* Add the vlan */
 285 static void s2io_vlan_rx_register(struct net_device *dev,
 286                                         struct vlan_group *grp)
 287 {
 288         struct s2io_nic *nic = dev->priv;
 289         unsigned long flags;
 290
 291         spin_lock_irqsave(&nic->tx_lock, flags);
 292         nic->vlgrp = grp;
 293         spin_unlock_irqrestore(&nic->tx_lock, flags);
 294 }
 295
 296 /* Unregister the vlan */
 297 static void s2io_vlan_rx_kill_vid(struct net_device *dev, unsigned long vid)
 298 {
 299         struct s2io_nic *nic = dev->priv;
 300         unsigned long flags;
 301
 302         spin_lock_irqsave(&nic->tx_lock, flags);
 303         if (nic->vlgrp)
 304                 nic->vlgrp->vlan_devices[vid] = NULL;
 305         spin_unlock_irqrestore(&nic->tx_lock, flags);
 306 }
 307
 308 /*
 309  * Constants to be programmed into the Xena's registers, to configure
 310  * the XAUI.
 311  */
 312
 313 #define END_SIGN        0x0
 314 static const u64 herc_act_dtx_cfg[] = {
 315         /* Set address */
 316         0x8000051536750000ULL, 0x80000515367500E0ULL,
 317         /* Write data */
 318         0x8000051536750004ULL, 0x80000515367500E4ULL,
 319         /* Set address */
 320         0x80010515003F0000ULL, 0x80010515003F00E0ULL,
 321         /* Write data */
 322         0x80010515003F0004ULL, 0x80010515003F00E4ULL,
 323         /* Set address */
 324         0x801205150D440000ULL, 0x801205150D4400E0ULL,
 325         /* Write data */
 326         0x801205150D440004ULL, 0x801205150D4400E4ULL,
 327         /* Set address */
 328         0x80020515F2100000ULL, 0x80020515F21000E0ULL,
 329         /* Write data */
 330         0x80020515F2100004ULL, 0x80020515F21000E4ULL,
 331         /* Done */
 332         END_SIGN
 333 };
 334
 335 static const u64 xena_dtx_cfg[] = {
 336         /* Set address */
 337         0x8000051500000000ULL, 0x80000515000000E0ULL,
 338         /* Write data */
 339         0x80000515D9350004ULL, 0x80000515D93500E4ULL,
 340         /* Set address */
 341         0x8001051500000000ULL, 0x80010515000000E0ULL,
 342         /* Write data */
 343         0x80010515001E0004ULL, 0x80010515001E00E4ULL,
 344         /* Set address */
 345         0x8002051500000000ULL, 0x80020515000000E0ULL,
 346         /* Write data */
 347         0x80020515F2100004ULL, 0x80020515F21000E4ULL,
 348         END_SIGN
 349 };
 350
 351 /*
 352  * Constants for Fixing the MacAddress problem seen mostly on
 353  * Alpha machines.
 354  */
 355 static const u64 fix_mac[] = {
 356         0x0060000000000000ULL, 0x0060600000000000ULL,
 357         0x0040600000000000ULL, 0x0000600000000000ULL,
 358         0x0020600000000000ULL, 0x0060600000000000ULL,
 359         0x0020600000000000ULL, 0x0060600000000000ULL,
 360         0x0020600000000000ULL, 0x0060600000000000ULL,
 361         0x0020600000000000ULL, 0x0060600000000000ULL,
 362         0x0020600000000000ULL, 0x0060600000000000ULL,
 363         0x0020600000000000ULL, 0x0060600000000000ULL,
 364         0x0020600000000000ULL, 0x0060600000000000ULL,
 365         0x0020600000000000ULL, 0x0060600000000000ULL,
 366         0x0020600000000000ULL, 0x0060600000000000ULL,
 367         0x0020600000000000ULL, 0x0060600000000000ULL,
 368         0x0020600000000000ULL, 0x0000600000000000ULL,
 369         0x0040600000000000ULL, 0x0060600000000000ULL,
 370         END_SIGN
 371 };
 372
 373 MODULE_AUTHOR("Raghavendra Koushik <raghavendra.koushik@neterion.com>");
 374 MODULE_LICENSE("GPL");
 375 MODULE_VERSION(DRV_VERSION);
 376
 377
 378 /* Module Loadable parameters. */
 379 S2IO_PARM_INT(tx_fifo_num, 1);
 380 S2IO_PARM_INT(rx_ring_num, 1);
 381
 382
 383 S2IO_PARM_INT(rx_ring_mode, 1);
 384 S2IO_PARM_INT(use_continuous_tx_intrs, 1);
 385 S2IO_PARM_INT(rmac_pause_time, 0x100);
 386 S2IO_PARM_INT(mc_pause_threshold_q0q3, 187);
 387 S2IO_PARM_INT(mc_pause_threshold_q4q7, 187);
 388 S2IO_PARM_INT(shared_splits, 0);
 389 S2IO_PARM_INT(tmac_util_period, 5);
 390 S2IO_PARM_INT(rmac_util_period, 5);
 391 S2IO_PARM_INT(bimodal, 0);
 392 S2IO_PARM_INT(l3l4hdr_size, 128);
 393 /* Frequency of Rx desc syncs expressed as power of 2 */
 394 S2IO_PARM_INT(rxsync_frequency, 3);
 395 /* Interrupt type. Values can be 0(INTA), 1(MSI), 2(MSI_X) */
 396 S2IO_PARM_INT(intr_type, 0);
 397 /* Large receive offload feature */
 398 S2IO_PARM_INT(lro, 0);
 399 /* Max pkts to be aggregated by LRO at one time. If not specified,
 400  * aggregation happens until we hit max IP pkt size(64K)
 401  */
 402 S2IO_PARM_INT(lro_max_pkts, 0xFFFF);
 403 S2IO_PARM_INT(indicate_max_pkts, 0);
 404
 405 S2IO_PARM_INT(napi, 1);
 406 S2IO_PARM_INT(ufo, 0);
 407
 408 static unsigned int tx_fifo_len[MAX_TX_FIFOS] =
 409     {DEFAULT_FIFO_0_LEN, [1 ...(MAX_TX_FIFOS - 1)] = DEFAULT_FIFO_1_7_LEN};
 410 static unsigned int rx_ring_sz[MAX_RX_RINGS] =
 411     {[0 ...(MAX_RX_RINGS - 1)] = SMALL_BLK_CNT};
 412 static unsigned int rts_frm_len[MAX_RX_RINGS] =
 413     {[0 ...(MAX_RX_RINGS - 1)] = 0 };
 414
 415 module_param_array(tx_fifo_len, uint, NULL, 0);
 416 module_param_array(rx_ring_sz, uint, NULL, 0);
 417 module_param_array(rts_frm_len, uint, NULL, 0);
 418
 419 /*
 420  * S2IO device table.
 421  * This table lists all the devices that this driver supports.
 422  */
 423 static struct pci_device_id s2io_tbl[] __devinitdata = {
 424         {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_S2IO_WIN,
 425          PCI_ANY_ID, PCI_ANY_ID},
 426         {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_S2IO_UNI,
 427          PCI_ANY_ID, PCI_ANY_ID},
 428         {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_HERC_WIN,
 429          PCI_ANY_ID, PCI_ANY_ID},
 430         {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_HERC_UNI,
 431          PCI_ANY_ID, PCI_ANY_ID},
 432         {0,}
 433 };
 434
 435 MODULE_DEVICE_TABLE(pci, s2io_tbl);
 436
 437 static struct pci_driver s2io_driver = {
 438       .name = "S2IO",
 439       .id_table = s2io_tbl,
 440       .probe = s2io_init_nic,
 441       .remove = __devexit_p(s2io_rem_nic),
 442 };
 443
 444 /* A simplifier macro used both by init and free shared_mem Fns(). */
 445 #define TXD_MEM_PAGE_CNT(len, per_each) ((len+per_each - 1) / per_each)
 446
 447 /**
 448  * init_shared_mem - Allocation and Initialization of Memory
 449  * @nic: Device private variable.
 450  * Description: The function allocates all the memory areas shared
 451  * between the NIC and the driver. This includes Tx descriptors,
 452  * Rx descriptors and the statistics block.
 453  */
 454
 455 static int init_shared_mem(struct s2io_nic *nic)
 456 {
 457         u32 size;
 458         void *tmp_v_addr, *tmp_v_addr_next;
 459         dma_addr_t tmp_p_addr, tmp_p_addr_next;
 460         struct RxD_block *pre_rxd_blk = NULL;
 461         int i, j, blk_cnt;
 462         int lst_size, lst_per_page;
 463         struct net_device *dev = nic->dev;
 464         unsigned long tmp;
 465         struct buffAdd *ba;
 466
 467         struct mac_info *mac_control;
 468         struct config_param *config;
 469
 470         mac_control = &nic->mac_control;
 471         config = &nic->config;
 472
 473
 474         /* Allocation and initialization of TXDLs in FIOFs */
 475         size = 0;
 476         for (i = 0; i < config->tx_fifo_num; i++) {
 477                 size += config->tx_cfg[i].fifo_len;
 478         }
 479         if (size > MAX_AVAILABLE_TXDS) {
 480                 DBG_PRINT(ERR_DBG, "s2io: Requested TxDs too high, ");
 481                 DBG_PRINT(ERR_DBG, "Requested: %d, max supported: 8192\n", size);
 482                 return -EINVAL;
 483         }
 484
 485         lst_size = (sizeof(struct TxD) * config->max_txds);
 486         lst_per_page = PAGE_SIZE / lst_size;
 487
 488         for (i = 0; i < config->tx_fifo_num; i++) {
 489                 int fifo_len = config->tx_cfg[i].fifo_len;
 490                 int list_holder_size = fifo_len * sizeof(struct list_info_hold);
 491                 mac_control->fifos[i].list_info = kmalloc(list_holder_size,
 492                                                           GFP_KERNEL);
 493                 if (!mac_control->fifos[i].list_info) {
 494                         DBG_PRINT(ERR_DBG,
 495                                   "Malloc failed for list_info\n");
 496                         return -ENOMEM;
 497                 }
 498                 memset(mac_control->fifos[i].list_info, 0, list_holder_size);
 499         }
 500         for (i = 0; i < config->tx_fifo_num; i++) {
 501                 int page_num = TXD_MEM_PAGE_CNT(config->tx_cfg[i].fifo_len,
 502                                                 lst_per_page);
 503                 mac_control->fifos[i].tx_curr_put_info.offset = 0;
 504                 mac_control->fifos[i].tx_curr_put_info.fifo_len =
 505                     config->tx_cfg[i].fifo_len - 1;
 506                 mac_control->fifos[i].tx_curr_get_info.offset = 0;
 507                 mac_control->fifos[i].tx_curr_get_info.fifo_len =
 508                     config->tx_cfg[i].fifo_len - 1;
 509                 mac_control->fifos[i].fifo_no = i;
 510                 mac_control->fifos[i].nic = nic;
 511                 mac_control->fifos[i].max_txds = MAX_SKB_FRAGS + 2;
 512
 513                 for (j = 0; j < page_num; j++) {
 514                         int k = 0;
 515                         dma_addr_t tmp_p;
 516                         void *tmp_v;
 517                         tmp_v = pci_alloc_consistent(nic->pdev,
 518                                                      PAGE_SIZE, &tmp_p);
 519                         if (!tmp_v) {
 520                                 DBG_PRINT(ERR_DBG,
 521                                           "pci_alloc_consistent ");
 522                                 DBG_PRINT(ERR_DBG, "failed for TxDL\n");
 523                                 return -ENOMEM;
 524                         }
 525                         /* If we got a zero DMA address(can happen on
 526                          * certain platforms like PPC), reallocate.
 527                          * Store virtual address of page we don't want,
 528                          * to be freed later.
 529                          */
 530                         if (!tmp_p) {
 531                                 mac_control->zerodma_virt_addr = tmp_v;
 532                                 DBG_PRINT(INIT_DBG,
 533                                 "%s: Zero DMA address for TxDL. ", dev->name);
 534                                 DBG_PRINT(INIT_DBG,
 535                                 "Virtual address %p\n", tmp_v);
 536                                 tmp_v = pci_alloc_consistent(nic->pdev,
 537                                                      PAGE_SIZE, &tmp_p);
 538                                 if (!tmp_v) {
 539                                         DBG_PRINT(ERR_DBG,
 540                                           "pci_alloc_consistent ");
 541                                         DBG_PRINT(ERR_DBG, "failed for TxDL\n");
 542                                         return -ENOMEM;
 543                                 }
 544                         }
 545                         while (k < lst_per_page) {
 546                                 int l = (j * lst_per_page) + k;
 547                                 if (l == config->tx_cfg[i].fifo_len)
 548                                         break;
 549                                 mac_control->fifos[i].list_info[l].list_virt_addr =
 550                                     tmp_v + (k * lst_size);
 551                                 mac_control->fifos[i].list_info[l].list_phy_addr =
 552                                     tmp_p + (k * lst_size);
 553                                 k++;
 554                         }
 555                 }
 556         }
 557
 558         nic->ufo_in_band_v = kcalloc(size, sizeof(u64), GFP_KERNEL);
 559         if (!nic->ufo_in_band_v)
 560                 return -ENOMEM;
 561
 562         /* Allocation and initialization of RXDs in Rings */
 563         size = 0;
 564         for (i = 0; i < config->rx_ring_num; i++) {
 565                 if (config->rx_cfg[i].num_rxd %
 566                     (rxd_count[nic->rxd_mode] + 1)) {
 567                         DBG_PRINT(ERR_DBG, "%s: RxD count of ", dev->name);
 568                         DBG_PRINT(ERR_DBG, "Ring%d is not a multiple of ",
 569                                   i);
 570                         DBG_PRINT(ERR_DBG, "RxDs per Block");
 571                         return FAILURE;
 572                 }
 573                 size += config->rx_cfg[i].num_rxd;
 574                 mac_control->rings[i].block_count =
 575                         config->rx_cfg[i].num_rxd /
 576                         (rxd_count[nic->rxd_mode] + 1 );
 577                 mac_control->rings[i].pkt_cnt = config->rx_cfg[i].num_rxd -
 578                         mac_control->rings[i].block_count;
 579         }
 580         if (nic->rxd_mode == RXD_MODE_1)
 581                 size = (size * (sizeof(struct RxD1)));
 582         else
 583                 size = (size * (sizeof(struct RxD3)));
 584
 585         for (i = 0; i < config->rx_ring_num; i++) {
 586                 mac_control->rings[i].rx_curr_get_info.block_index = 0;
 587                 mac_control->rings[i].rx_curr_get_info.offset = 0;
 588                 mac_control->rings[i].rx_curr_get_info.ring_len =
 589                     config->rx_cfg[i].num_rxd - 1;
 590                 mac_control->rings[i].rx_curr_put_info.block_index = 0;
 591                 mac_control->rings[i].rx_curr_put_info.offset = 0;
 592                 mac_control->rings[i].rx_curr_put_info.ring_len =
 593                     config->rx_cfg[i].num_rxd - 1;
 594                 mac_control->rings[i].nic = nic;
 595                 mac_control->rings[i].ring_no = i;
 596
 597                 blk_cnt = config->rx_cfg[i].num_rxd /
 598                                 (rxd_count[nic->rxd_mode] + 1);
 599                 /*  Allocating all the Rx blocks */
 600                 for (j = 0; j < blk_cnt; j++) {
 601                         struct rx_block_info *rx_blocks;
 602                         int l;
 603
 604                         rx_blocks = &mac_control->rings[i].rx_blocks[j];
 605                         size = SIZE_OF_BLOCK; //size is always page size
 606                         tmp_v_addr = pci_alloc_consistent(nic->pdev, size,
 607                                                           &tmp_p_addr);
 608                         if (tmp_v_addr == NULL) {
 609                                 /*
 610                                  * In case of failure, free_shared_mem()
 611                                  * is called, which should free any
 612                                  * memory that was alloced till the
 613                                  * failure happened.
 614                                  */
 615                                 rx_blocks->block_virt_addr = tmp_v_addr;
 616                                 return -ENOMEM;
 617                         }
 618                         memset(tmp_v_addr, 0, size);
 619                         rx_blocks->block_virt_addr = tmp_v_addr;
 620                         rx_blocks->block_dma_addr = tmp_p_addr;
 621                         rx_blocks->rxds = kmalloc(sizeof(struct rxd_info)*
 622                                                   rxd_count[nic->rxd_mode],
 623                                                   GFP_KERNEL);
 624                         if (!rx_blocks->rxds)
 625                                 return -ENOMEM;
 626                         for (l=0; l<rxd_count[nic->rxd_mode];l++) {
 627                                 rx_blocks->rxds[l].virt_addr =
 628                                         rx_blocks->block_virt_addr +
 629                                         (rxd_size[nic->rxd_mode] * l);
 630                                 rx_blocks->rxds[l].dma_addr =
 631                                         rx_blocks->block_dma_addr +
 632                                         (rxd_size[nic->rxd_mode] * l);
 633                         }
 634                 }
 635                 /* Interlinking all Rx Blocks */
 636                 for (j = 0; j < blk_cnt; j++) {
 637                         tmp_v_addr =
 638                                 mac_control->rings[i].rx_blocks[j].block_virt_addr;
 639                         tmp_v_addr_next =
 640                                 mac_control->rings[i].rx_blocks[(j + 1) %
 641                                               blk_cnt].block_virt_addr;
 642                         tmp_p_addr =
 643                                 mac_control->rings[i].rx_blocks[j].block_dma_addr;
 644                         tmp_p_addr_next =
 645                                 mac_control->rings[i].rx_blocks[(j + 1) %
 646                                               blk_cnt].block_dma_addr;
 647
 648                         pre_rxd_blk = (struct RxD_block *) tmp_v_addr;
 649                         pre_rxd_blk->reserved_2_pNext_RxD_block =
 650                             (unsigned long) tmp_v_addr_next;
 651                         pre_rxd_blk->pNext_RxD_Blk_physical =
 652                             (u64) tmp_p_addr_next;
 653                 }
 654         }
 655         if (nic->rxd_mode >= RXD_MODE_3A) {
 656                 /*
 657                  * Allocation of Storages for buffer addresses in 2BUFF mode
 658                  * and the buffers as well.
 659                  */
 660                 for (i = 0; i < config->rx_ring_num; i++) {
 661                         blk_cnt = config->rx_cfg[i].num_rxd /
 662                            (rxd_count[nic->rxd_mode]+ 1);
 663                         mac_control->rings[i].ba =
 664                                 kmalloc((sizeof(struct buffAdd *) * blk_cnt),
 665                                      GFP_KERNEL);
 666                         if (!mac_control->rings[i].ba)
 667                                 return -ENOMEM;
 668                         for (j = 0; j < blk_cnt; j++) {
 669                                 int k = 0;
 670                                 mac_control->rings[i].ba[j] =
 671                                         kmalloc((sizeof(struct buffAdd) *
 672                                                 (rxd_count[nic->rxd_mode] + 1)),
 673                                                 GFP_KERNEL);
 674                                 if (!mac_control->rings[i].ba[j])
 675                                         return -ENOMEM;
 676                                 while (k != rxd_count[nic->rxd_mode]) {
 677                                         ba = &mac_control->rings[i].ba[j][k];
 678
 679                                         ba->ba_0_org = (void *) kmalloc
 680                                             (BUF0_LEN + ALIGN_SIZE, GFP_KERNEL);
 681                                         if (!ba->ba_0_org)
 682                                                 return -ENOMEM;
 683                                         tmp = (unsigned long)ba->ba_0_org;
 684                                         tmp += ALIGN_SIZE;
 685                                         tmp &= ~((unsigned long) ALIGN_SIZE);
 686                                         ba->ba_0 = (void *) tmp;
 687
 688                                         ba->ba_1_org = (void *) kmalloc
 689                                             (BUF1_LEN + ALIGN_SIZE, GFP_KERNEL);
 690                                         if (!ba->ba_1_org)
 691                                                 return -ENOMEM;
 692                                         tmp = (unsigned long) ba->ba_1_org;
 693                                         tmp += ALIGN_SIZE;
 694                                         tmp &= ~((unsigned long) ALIGN_SIZE);
 695                                         ba->ba_1 = (void *) tmp;
 696                                         k++;
 697                                 }
 698                         }
 699                 }
 700         }
 701
 702         /* Allocation and initialization of Statistics block */
 703         size = sizeof(struct stat_block);
 704         mac_control->stats_mem = pci_alloc_consistent
 705             (nic->pdev, size, &mac_control->stats_mem_phy);
 706
 707         if (!mac_control->stats_mem) {
 708                 /*
 709                  * In case of failure, free_shared_mem() is called, which
 710                  * should free any memory that was alloced till the
 711                  * failure happened.
 712                  */
 713                 return -ENOMEM;
 714         }
 715         mac_control->stats_mem_sz = size;
 716
 717         tmp_v_addr = mac_control->stats_mem;
 718         mac_control->stats_info = (struct stat_block *) tmp_v_addr;
 719         memset(tmp_v_addr, 0, size);
 720         DBG_PRINT(INIT_DBG, "%s:Ring Mem PHY: 0x%llx\n", dev->name,
 721                   (unsigned long long) tmp_p_addr);
 722
 723         return SUCCESS;
 724 }
 725
 726 /**
 727  * free_shared_mem - Free the allocated Memory
 728  * @nic:  Device private variable.
 729  * Description: This function is to free all memory locations allocated by
 730  * the init_shared_mem() function and return it to the kernel.
 731  */
 732
 733 static void free_shared_mem(struct s2io_nic *nic)
 734 {
 735         int i, j, blk_cnt, size;
 736         void *tmp_v_addr;
 737         dma_addr_t tmp_p_addr;
 738         struct mac_info *mac_control;
 739         struct config_param *config;
 740         int lst_size, lst_per_page;
 741         struct net_device *dev = nic->dev;
 742
 743         if (!nic)
 744                 return;
 745
 746         mac_control = &nic->mac_control;
 747         config = &nic->config;
 748
 749         lst_size = (sizeof(struct TxD) * config->max_txds);
 750         lst_per_page = PAGE_SIZE / lst_size;
 751
 752         for (i = 0; i < config->tx_fifo_num; i++) {
 753                 int page_num = TXD_MEM_PAGE_CNT(config->tx_cfg[i].fifo_len,
 754                                                 lst_per_page);
 755                 for (j = 0; j < page_num; j++) {
 756                         int mem_blks = (j * lst_per_page);
 757                         if (!mac_control->fifos[i].list_info)
 758                                 return;
 759                         if (!mac_control->fifos[i].list_info[mem_blks].
 760                                  list_virt_addr)
 761                                 break;
 762                         pci_free_consistent(nic->pdev, PAGE_SIZE,
 763                                             mac_control->fifos[i].
 764                                             list_info[mem_blks].
 765                                             list_virt_addr,
 766                                             mac_control->fifos[i].
 767                                             list_info[mem_blks].
 768                                             list_phy_addr);
 769                 }
 770                 /* If we got a zero DMA address during allocation,
 771                  * free the page now
 772                  */
 773                 if (mac_control->zerodma_virt_addr) {
 774                         pci_free_consistent(nic->pdev, PAGE_SIZE,
 775                                             mac_control->zerodma_virt_addr,
 776                                             (dma_addr_t)0);
 777                         DBG_PRINT(INIT_DBG,
 778                                 "%s: Freeing TxDL with zero DMA addr. ",
 779                                 dev->name);
 780                         DBG_PRINT(INIT_DBG, "Virtual address %p\n",
 781                                 mac_control->zerodma_virt_addr);
 782                 }
 783                 kfree(mac_control->fifos[i].list_info);
 784         }
 785
 786         size = SIZE_OF_BLOCK;
 787         for (i = 0; i < config->rx_ring_num; i++) {
 788                 blk_cnt = mac_control->rings[i].block_count;
 789                 for (j = 0; j < blk_cnt; j++) {
 790                         tmp_v_addr = mac_control->rings[i].rx_blocks[j].
 791                                 block_virt_addr;
 792                         tmp_p_addr = mac_control->rings[i].rx_blocks[j].
 793                                 block_dma_addr;
 794                         if (tmp_v_addr == NULL)
 795                                 break;
 796                         pci_free_consistent(nic->pdev, size,
 797                                             tmp_v_addr, tmp_p_addr);
 798                         kfree(mac_control->rings[i].rx_blocks[j].rxds);
 799                 }
 800         }
 801
 802         if (nic->rxd_mode >= RXD_MODE_3A) {
 803                 /* Freeing buffer storage addresses in 2BUFF mode. */
 804                 for (i = 0; i < config->rx_ring_num; i++) {
 805                         blk_cnt = config->rx_cfg[i].num_rxd /
 806                             (rxd_count[nic->rxd_mode] + 1);
 807                         for (j = 0; j < blk_cnt; j++) {
 808                                 int k = 0;
 809                                 if (!mac_control->rings[i].ba[j])
 810                                         continue;
 811                                 while (k != rxd_count[nic->rxd_mode]) {
 812                                         struct buffAdd *ba =
 813                                                 &mac_control->rings[i].ba[j][k];
 814                                         kfree(ba->ba_0_org);
 815                                         kfree(ba->ba_1_org);
 816                                         k++;
 817                                 }
 818                                 kfree(mac_control->rings[i].ba[j]);
 819                         }
 820                         kfree(mac_control->rings[i].ba);
 821                 }
 822         }
 823
 824         if (mac_control->stats_mem) {
 825                 pci_free_consistent(nic->pdev,
 826                                     mac_control->stats_mem_sz,
 827                                     mac_control->stats_mem,
 828                                     mac_control->stats_mem_phy);
 829         }
 830         if (nic->ufo_in_band_v)
 831                 kfree(nic->ufo_in_band_v);
 832 }
 833
 834 /**
 835  * s2io_verify_pci_mode -
 836  */
 837
 838 static int s2io_verify_pci_mode(struct s2io_nic *nic)
 839 {
 840         struct XENA_dev_config __iomem *bar0 = nic->bar0;
 841         register u64 val64 = 0;
 842         int     mode;
 843
 844         val64 = readq(&bar0->pci_mode);
 845         mode = (u8)GET_PCI_MODE(val64);
 846
 847         if ( val64 & PCI_MODE_UNKNOWN_MODE)
 848                 return -1;      /* Unknown PCI mode */
 849         return mode;
 850 }
 851
 852 #define NEC_VENID   0x1033
 853 #define NEC_DEVID   0x0125
 854 static int s2io_on_nec_bridge(struct pci_dev *s2io_pdev)
 855 {
 856         struct pci_dev *tdev = NULL;
 857         while ((tdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, tdev)) != NULL) {
 858                 if (tdev->vendor == NEC_VENID && tdev->device == NEC_DEVID) {
 859                         if (tdev->bus == s2io_pdev->bus->parent)
 860                                 pci_dev_put(tdev);
 861                                 return 1;
 862                 }
 863         }
 864         return 0;
 865 }
 866
 867 static int bus_speed[8] = {33, 133, 133, 200, 266, 133, 200, 266};
 868 /**
 869  * s2io_print_pci_mode -
 870  */
 871 static int s2io_print_pci_mode(struct s2io_nic *nic)
 872 {
 873         struct XENA_dev_config __iomem *bar0 = nic->bar0;
 874         register u64 val64 = 0;
 875         int     mode;
 876         struct config_param *config = &nic->config;
 877
 878         val64 = readq(&bar0->pci_mode);
 879         mode = (u8)GET_PCI_MODE(val64);
 880
 881         if ( val64 & PCI_MODE_UNKNOWN_MODE)
 882                 return -1;      /* Unknown PCI mode */
 883
 884         config->bus_speed = bus_speed[mode];
 885
 886         if (s2io_on_nec_bridge(nic->pdev)) {
 887                 DBG_PRINT(ERR_DBG, "%s: Device is on PCI-E bus\n",
 888                                                         nic->dev->name);
 889                 return mode;
 890         }
 891
 892         if (val64 & PCI_MODE_32_BITS) {
 893                 DBG_PRINT(ERR_DBG, "%s: Device is on 32 bit ", nic->dev->name);
 894         } else {
 895                 DBG_PRINT(ERR_DBG, "%s: Device is on 64 bit ", nic->dev->name);
 896         }
 897
 898         switch(mode) {
 899                 case PCI_MODE_PCI_33:
 900                         DBG_PRINT(ERR_DBG, "33MHz PCI bus\n");
 901                         break;
 902                 case PCI_MODE_PCI_66:
 903                         DBG_PRINT(ERR_DBG, "66MHz PCI bus\n");
 904                         break;
 905                 case PCI_MODE_PCIX_M1_66:
 906                         DBG_PRINT(ERR_DBG, "66MHz PCIX(M1) bus\n");
 907                         break;
 908                 case PCI_MODE_PCIX_M1_100:
 909                         DBG_PRINT(ERR_DBG, "100MHz PCIX(M1) bus\n");
 910                         break;
 911                 case PCI_MODE_PCIX_M1_133:
 912                         DBG_PRINT(ERR_DBG, "133MHz PCIX(M1) bus\n");
 913                         break;
 914                 case PCI_MODE_PCIX_M2_66:
 915                         DBG_PRINT(ERR_DBG, "133MHz PCIX(M2) bus\n");
 916                         break;
 917                 case PCI_MODE_PCIX_M2_100:
 918                         DBG_PRINT(ERR_DBG, "200MHz PCIX(M2) bus\n");
 919                         break;
 920                 case PCI_MODE_PCIX_M2_133:
 921                         DBG_PRINT(ERR_DBG, "266MHz PCIX(M2) bus\n");
 922                         break;
 923                 default:
 924                         return -1;      /* Unsupported bus speed */
 925         }
 926
 927         return mode;
 928 }
 929
 930 /**
 931  *  init_nic - Initialization of hardware
 932  *  @nic: device peivate variable
 933  *  Description: The function sequentially configures every block
 934  *  of the H/W from their reset values.
 935  *  Return Value:  SUCCESS on success and
 936  *  '-1' on failure (endian settings incorrect).
 937  */
 938
 939 static int init_nic(struct s2io_nic *nic)
 940 {
 941         struct XENA_dev_config __iomem *bar0 = nic->bar0;
 942         struct net_device *dev = nic->dev;
 943         register u64 val64 = 0;
 944         void __iomem *add;
 945         u32 time;
 946         int i, j;
 947         struct mac_info *mac_control;
 948         struct config_param *config;
 949         int dtx_cnt = 0;
 950         unsigned long long mem_share;
 951         int mem_size;
 952
 953         mac_control = &nic->mac_control;
 954         config = &nic->config;
 955
 956         /* to set the swapper controle on the card */
 957         if(s2io_set_swapper(nic)) {
 958                 DBG_PRINT(ERR_DBG,"ERROR: Setting Swapper failed\n");
 959                 return -1;
 960         }
 961
 962         /*
 963          * Herc requires EOI to be removed from reset before XGXS, so..
 964          */
 965         if (nic->device_type & XFRAME_II_DEVICE) {
 966                 val64 = 0xA500000000ULL;
 967                 writeq(val64, &bar0->sw_reset);
 968                 msleep(500);
 969                 val64 = readq(&bar0->sw_reset);
 970         }
 971
 972         /* Remove XGXS from reset state */
 973         val64 = 0;
 974         writeq(val64, &bar0->sw_reset);
 975         msleep(500);
 976         val64 = readq(&bar0->sw_reset);
 977
 978         /*  Enable Receiving broadcasts */
 979         add = &bar0->mac_cfg;
 980         val64 = readq(&bar0->mac_cfg);
 981         val64 |= MAC_RMAC_BCAST_ENABLE;
 982         writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
 983         writel((u32) val64, add);
 984         writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
 985         writel((u32) (val64 >> 32), (add + 4));
 986
 987         /* Read registers in all blocks */
 988         val64 = readq(&bar0->mac_int_mask);
 989         val64 = readq(&bar0->mc_int_mask);
 990         val64 = readq(&bar0->xgxs_int_mask);
 991
 992         /*  Set MTU */
 993         val64 = dev->mtu;
 994         writeq(vBIT(val64, 2, 14), &bar0->rmac_max_pyld_len);
 995
 996         if (nic->device_type & XFRAME_II_DEVICE) {
 997                 while (herc_act_dtx_cfg[dtx_cnt] != END_SIGN) {
 998                         SPECIAL_REG_WRITE(herc_act_dtx_cfg[dtx_cnt],
 999                                           &bar0->dtx_control, UF);
1000                         if (dtx_cnt & 0x1)
1001                                 msleep(1); /* Necessary!! */
1002                         dtx_cnt++;
1003                 }
1004         } else {
1005                 while (xena_dtx_cfg[dtx_cnt] != END_SIGN) {
1006                         SPECIAL_REG_WRITE(xena_dtx_cfg[dtx_cnt],
1007                                           &bar0->dtx_control, UF);
1008                         val64 = readq(&bar0->dtx_control);
1009                         dtx_cnt++;
1010                 }
1011         }
1012
1013         /*  Tx DMA Initialization */
1014         val64 = 0;
1015         writeq(val64, &bar0->tx_fifo_partition_0);
1016         writeq(val64, &bar0->tx_fifo_partition_1);
1017         writeq(val64, &bar0->tx_fifo_partition_2);
1018         writeq(val64, &bar0->tx_fifo_partition_3);
1019
1020
1021         for (i = 0, j = 0; i < config->tx_fifo_num; i++) {
1022                 val64 |=
1023                     vBIT(config->tx_cfg[i].fifo_len - 1, ((i * 32) + 19),
1024                          13) | vBIT(config->tx_cfg[i].fifo_priority,
1025                                     ((i * 32) + 5), 3);
1026
1027                 if (i == (config->tx_fifo_num - 1)) {
1028                         if (i % 2 == 0)
1029                                 i++;
1030                 }
1031
1032                 switch (i) {
1033                 case 1:
1034                         writeq(val64, &bar0->tx_fifo_partition_0);
1035                         val64 = 0;
1036                         break;
1037                 case 3:
1038                         writeq(val64, &bar0->tx_fifo_partition_1);
1039                         val64 = 0;
1040                         break;
1041                 case 5:
1042                         writeq(val64, &bar0->tx_fifo_partition_2);
1043                         val64 = 0;
1044                         break;
1045                 case 7:
1046                         writeq(val64, &bar0->tx_fifo_partition_3);
1047                         break;
1048                 }
1049         }
1050
1051         /*
1052          * Disable 4 PCCs for Xena1, 2 and 3 as per H/W bug
1053          * SXE-008 TRANSMIT DMA ARBITRATION ISSUE.
1054          */
1055         if ((nic->device_type == XFRAME_I_DEVICE) &&
1056                 (get_xena_rev_id(nic->pdev) < 4))
1057                 writeq(PCC_ENABLE_FOUR, &bar0->pcc_enable);
1058
1059         val64 = readq(&bar0->tx_fifo_partition_0);
1060         DBG_PRINT(INIT_DBG, "Fifo partition at: 0x%p is: 0x%llx\n",
1061                   &bar0->tx_fifo_partition_0, (unsigned long long) val64);
1062
1063         /*
1064          * Initialization of Tx_PA_CONFIG register to ignore packet
1065          * integrity checking.
1066          */
1067         val64 = readq(&bar0->tx_pa_cfg);
1068         val64 |= TX_PA_CFG_IGNORE_FRM_ERR | TX_PA_CFG_IGNORE_SNAP_OUI |
1069             TX_PA_CFG_IGNORE_LLC_CTRL | TX_PA_CFG_IGNORE_L2_ERR;
1070         writeq(val64, &bar0->tx_pa_cfg);
1071
1072         /* Rx DMA intialization. */
1073         val64 = 0;
1074         for (i = 0; i < config->rx_ring_num; i++) {
1075                 val64 |=
1076                     vBIT(config->rx_cfg[i].ring_priority, (5 + (i * 8)),
1077                          3);
1078         }
1079         writeq(val64, &bar0->rx_queue_priority);
1080
1081         /*
1082          * Allocating equal share of memory to all the
1083          * configured Rings.
1084          */
1085         val64 = 0;
1086         if (nic->device_type & XFRAME_II_DEVICE)
1087                 mem_size = 32;
1088         else
1089                 mem_size = 64;
1090
1091         for (i = 0; i < config->rx_ring_num; i++) {
1092                 switch (i) {
1093                 case 0:
1094                         mem_share = (mem_size / config->rx_ring_num +
1095                                      mem_size % config->rx_ring_num);
1096                         val64 |= RX_QUEUE_CFG_Q0_SZ(mem_share);
1097                         continue;
1098                 case 1:
1099                         mem_share = (mem_size / config->rx_ring_num);
1100                         val64 |= RX_QUEUE_CFG_Q1_SZ(mem_share);
1101                         continue;
1102                 case 2:
1103                         mem_share = (mem_size / config->rx_ring_num);
1104                         val64 |= RX_QUEUE_CFG_Q2_SZ(mem_share);
1105                         continue;
1106                 case 3:
1107                         mem_share = (mem_size / config->rx_ring_num);
1108                         val64 |= RX_QUEUE_CFG_Q3_SZ(mem_share);
1109                         continue;
1110                 case 4:
1111                         mem_share = (mem_size / config->rx_ring_num);
1112                         val64 |= RX_QUEUE_CFG_Q4_SZ(mem_share);
1113                         continue;
1114                 case 5:
1115                         mem_share = (mem_size / config->rx_ring_num);
1116                         val64 |= RX_QUEUE_CFG_Q5_SZ(mem_share);
1117                         continue;
1118                 case 6:
1119                         mem_share = (mem_size / config->rx_ring_num);
1120                         val64 |= RX_QUEUE_CFG_Q6_SZ(mem_share);
1121                         continue;
1122                 case 7:
1123                         mem_share = (mem_size / config->rx_ring_num);
1124                         val64 |= RX_QUEUE_CFG_Q7_SZ(mem_share);
1125                         continue;
1126                 }
1127         }
1128         writeq(val64, &bar0->rx_queue_cfg);
1129
1130         /*
1131          * Filling Tx round robin registers
1132          * as per the number of FIFOs
1133          */
1134         switch (config->tx_fifo_num) {
1135         case 1:
1136                 val64 = 0x0000000000000000ULL;
1137                 writeq(val64, &bar0->tx_w_round_robin_0);
1138                 writeq(val64, &bar0->tx_w_round_robin_1);
1139                 writeq(val64, &bar0->tx_w_round_robin_2);
1140                 writeq(val64, &bar0->tx_w_round_robin_3);
1141                 writeq(val64, &bar0->tx_w_round_robin_4);
1142                 break;
1143         case 2:
1144                 val64 = 0x0000010000010000ULL;
1145                 writeq(val64, &bar0->tx_w_round_robin_0);
1146                 val64 = 0x0100000100000100ULL;
1147                 writeq(val64, &bar0->tx_w_round_robin_1);
1148                 val64 = 0x0001000001000001ULL;
1149                 writeq(val64, &bar0->tx_w_round_robin_2);
1150                 val64 = 0x0000010000010000ULL;
1151                 writeq(val64, &bar0->tx_w_round_robin_3);
1152                 val64 = 0x0100000000000000ULL;
1153                 writeq(val64, &bar0->tx_w_round_robin_4);
1154                 break;
1155         case 3:
1156                 val64 = 0x0001000102000001ULL;
1157                 writeq(val64, &bar0->tx_w_round_robin_0);
1158                 val64 = 0x0001020000010001ULL;
1159                 writeq(val64, &bar0->tx_w_round_robin_1);
1160                 val64 = 0x0200000100010200ULL;
1161                 writeq(val64, &bar0->tx_w_round_robin_2);
1162                 val64 = 0x0001000102000001ULL;
1163                 writeq(val64, &bar0->tx_w_round_robin_3);
1164                 val64 = 0x0001020000000000ULL;
1165                 writeq(val64, &bar0->tx_w_round_robin_4);
1166                 break;
1167         case 4:
1168                 val64 = 0x0001020300010200ULL;
1169                 writeq(val64, &bar0->tx_w_round_robin_0);
1170                 val64 = 0x0100000102030001ULL;
1171                 writeq(val64, &bar0->tx_w_round_robin_1);
1172                 val64 = 0x0200010000010203ULL;
1173                 writeq(val64, &bar0->tx_w_round_robin_2);
1174                 val64 = 0x0001020001000001ULL;
1175                 writeq(val64, &bar0->tx_w_round_robin_3);
1176                 val64 = 0x0203000100000000ULL;
1177                 writeq(val64, &bar0->tx_w_round_robin_4);
1178                 break;
1179         case 5:
1180                 val64 = 0x0001000203000102ULL;
1181                 writeq(val64, &bar0->tx_w_round_robin_0);
1182                 val64 = 0x0001020001030004ULL;
1183                 writeq(val64, &bar0->tx_w_round_robin_1);
1184                 val64 = 0x0001000203000102ULL;
1185                 writeq(val64, &bar0->tx_w_round_robin_2);
1186                 val64 = 0x0001020001030004ULL;
1187                 writeq(val64, &bar0->tx_w_round_robin_3);
1188                 val64 = 0x0001000000000000ULL;
1189                 writeq(val64, &bar0->tx_w_round_robin_4);
1190                 break;
1191         case 6:
1192                 val64 = 0x0001020304000102ULL;
1193                 writeq(val64, &bar0->tx_w_round_robin_0);
1194                 val64 = 0x0304050001020001ULL;
1195                 writeq(val64, &bar0->tx_w_round_robin_1);
1196                 val64 = 0x0203000100000102ULL;
1197                 writeq(val64, &bar0->tx_w_round_robin_2);
1198                 val64 = 0x0304000102030405ULL;
1199                 writeq(val64, &bar0->tx_w_round_robin_3);
1200                 val64 = 0x0001000200000000ULL;
1201                 writeq(val64, &bar0->tx_w_round_robin_4);
1202                 break;
1203         case 7:
1204                 val64 = 0x0001020001020300ULL;
1205                 writeq(val64, &bar0->tx_w_round_robin_0);
1206                 val64 = 0x0102030400010203ULL;
1207                 writeq(val64, &bar0->tx_w_round_robin_1);
1208                 val64 = 0x0405060001020001ULL;
1209                 writeq(val64, &bar0->tx_w_round_robin_2);
1210                 val64 = 0x0304050000010200ULL;
1211                 writeq(val64, &bar0->tx_w_round_robin_3);
1212                 val64 = 0x0102030000000000ULL;
1213                 writeq(val64, &bar0->tx_w_round_robin_4);
1214                 break;
1215         case 8:
1216                 val64 = 0x0001020300040105ULL;
1217                 writeq(val64, &bar0->tx_w_round_robin_0);
1218                 val64 = 0x0200030106000204ULL;
1219                 writeq(val64, &bar0->tx_w_round_robin_1);
1220                 val64 = 0x0103000502010007ULL;
1221                 writeq(val64, &bar0->tx_w_round_robin_2);
1222                 val64 = 0x0304010002060500ULL;
1223                 writeq(val64, &bar0->tx_w_round_robin_3);
1224                 val64 = 0x0103020400000000ULL;
1225                 writeq(val64, &bar0->tx_w_round_robin_4);
1226                 break;
1227         }
1228
1229         /* Enable all configured Tx FIFO partitions */
1230         val64 = readq(&bar0->tx_fifo_partition_0);
1231         val64 |= (TX_FIFO_PARTITION_EN);
1232         writeq(val64, &bar0->tx_fifo_partition_0);
1233
1234         /* Filling the Rx round robin registers as per the
1235          * number of Rings and steering based on QoS.
1236          */
1237         switch (config->rx_ring_num) {
1238         case 1:
1239                 val64 = 0x8080808080808080ULL;
1240                 writeq(val64, &bar0->rts_qos_steering);
1241                 break;
1242         case 2:
1243                 val64 = 0x0000010000010000ULL;
1244                 writeq(val64, &bar0->rx_w_round_robin_0);
1245                 val64 = 0x0100000100000100ULL;
1246                 writeq(val64, &bar0->rx_w_round_robin_1);
1247                 val64 = 0x0001000001000001ULL;
1248                 writeq(val64, &bar0->rx_w_round_robin_2);
1249                 val64 = 0x0000010000010000ULL;
1250                 writeq(val64, &bar0->rx_w_round_robin_3);
1251                 val64 = 0x0100000000000000ULL;
1252                 writeq(val64, &bar0->rx_w_round_robin_4);
1253
1254                 val64 = 0x8080808040404040ULL;
1255                 writeq(val64, &bar0->rts_qos_steering);
1256                 break;
1257         case 3:
1258                 val64 = 0x0001000102000001ULL;
1259                 writeq(val64, &bar0->rx_w_round_robin_0);
1260                 val64 = 0x0001020000010001ULL;
1261                 writeq(val64, &bar0->rx_w_round_robin_1);
1262                 val64 = 0x0200000100010200ULL;
1263                 writeq(val64, &bar0->rx_w_round_robin_2);
1264                 val64 = 0x0001000102000001ULL;
1265                 writeq(val64, &bar0->rx_w_round_robin_3);
1266                 val64 = 0x0001020000000000ULL;
1267                 writeq(val64, &bar0->rx_w_round_robin_4);
1268
1269                 val64 = 0x8080804040402020ULL;
1270                 writeq(val64, &bar0->rts_qos_steering);
1271                 break;
1272         case 4:
1273                 val64 = 0x0001020300010200ULL;
1274                 writeq(val64, &bar0->rx_w_round_robin_0);
1275                 val64 = 0x0100000102030001ULL;
1276                 writeq(val64, &bar0->rx_w_round_robin_1);
1277                 val64 = 0x0200010000010203ULL;
1278                 writeq(val64, &bar0->rx_w_round_robin_2);
1279                 val64 = 0x0001020001000001ULL;
1280                 writeq(val64, &bar0->rx_w_round_robin_3);
1281                 val64 = 0x0203000100000000ULL;
1282                 writeq(val64, &bar0->rx_w_round_robin_4);
1283
1284                 val64 = 0x8080404020201010ULL;
1285                 writeq(val64, &bar0->rts_qos_steering);
1286                 break;
1287         case 5:
1288                 val64 = 0x0001000203000102ULL;
1289                 writeq(val64, &bar0->rx_w_round_robin_0);
1290                 val64 = 0x0001020001030004ULL;
1291                 writeq(val64, &bar0->rx_w_round_robin_1);
1292                 val64 = 0x0001000203000102ULL;
1293                 writeq(val64, &bar0->rx_w_round_robin_2);
1294                 val64 = 0x0001020001030004ULL;
1295                 writeq(val64, &bar0->rx_w_round_robin_3);
1296                 val64 = 0x0001000000000000ULL;
1297                 writeq(val64, &bar0->rx_w_round_robin_4);
1298
1299                 val64 = 0x8080404020201008ULL;
1300                 writeq(val64, &bar0->rts_qos_steering);
1301                 break;
1302         case 6:
1303                 val64 = 0x0001020304000102ULL;
1304                 writeq(val64, &bar0->rx_w_round_robin_0);
1305                 val64 = 0x0304050001020001ULL;
1306                 writeq(val64, &bar0->rx_w_round_robin_1);
1307                 val64 = 0x0203000100000102ULL;
1308                 writeq(val64, &bar0->rx_w_round_robin_2);
1309                 val64 = 0x0304000102030405ULL;
1310                 writeq(val64, &bar0->rx_w_round_robin_3);
1311                 val64 = 0x0001000200000000ULL;
1312                 writeq(val64, &bar0->rx_w_round_robin_4);
1313
1314                 val64 = 0x8080404020100804ULL;
1315                 writeq(val64, &bar0->rts_qos_steering);
1316                 break;
1317         case 7:
1318                 val64 = 0x0001020001020300ULL;
1319                 writeq(val64, &bar0->rx_w_round_robin_0);
1320                 val64 = 0x0102030400010203ULL;
1321                 writeq(val64, &bar0->rx_w_round_robin_1);
1322                 val64 = 0x0405060001020001ULL;
1323                 writeq(val64, &bar0->rx_w_round_robin_2);
1324                 val64 = 0x0304050000010200ULL;
1325                 writeq(val64, &bar0->rx_w_round_robin_3);
1326                 val64 = 0x0102030000000000ULL;
1327                 writeq(val64, &bar0->rx_w_round_robin_4);
1328
1329                 val64 = 0x8080402010080402ULL;
1330                 writeq(val64, &bar0->rts_qos_steering);
1331                 break;
1332         case 8:
1333                 val64 = 0x0001020300040105ULL;
1334                 writeq(val64, &bar0->rx_w_round_robin_0);
1335                 val64 = 0x0200030106000204ULL;
1336                 writeq(val64, &bar0->rx_w_round_robin_1);
1337                 val64 = 0x0103000502010007ULL;
1338                 writeq(val64, &bar0->rx_w_round_robin_2);
1339                 val64 = 0x0304010002060500ULL;
1340                 writeq(val64, &bar0->rx_w_round_robin_3);
1341                 val64 = 0x0103020400000000ULL;
1342                 writeq(val64, &bar0->rx_w_round_robin_4);
1343
1344                 val64 = 0x8040201008040201ULL;
1345                 writeq(val64, &bar0->rts_qos_steering);
1346                 break;
1347         }
1348
1349         /* UDP Fix */
1350         val64 = 0;
1351         for (i = 0; i < 8; i++)
1352                 writeq(val64, &bar0->rts_frm_len_n[i]);
1353
1354         /* Set the default rts frame length for the rings configured */
1355         val64 = MAC_RTS_FRM_LEN_SET(dev->mtu+22);
1356         for (i = 0 ; i < config->rx_ring_num ; i++)
1357                 writeq(val64, &bar0->rts_frm_len_n[i]);
1358
1359         /* Set the frame length for the configured rings
1360          * desired by the user
1361          */
1362         for (i = 0; i < config->rx_ring_num; i++) {
1363                 /* If rts_frm_len[i] == 0 then it is assumed that user not
1364                  * specified frame length steering.
1365                  * If the user provides the frame length then program
1366                  * the rts_frm_len register for those values or else
1367                  * leave it as it is.
1368                  */
1369                 if (rts_frm_len[i] != 0) {
1370                         writeq(MAC_RTS_FRM_LEN_SET(rts_frm_len[i]),
1371                                 &bar0->rts_frm_len_n[i]);
1372                 }
1373         }
1374
1375         /* Program statistics memory */
1376         writeq(mac_control->stats_mem_phy, &bar0->stat_addr);
1377
1378         if (nic->device_type == XFRAME_II_DEVICE) {
1379                 val64 = STAT_BC(0x320);
1380                 writeq(val64, &bar0->stat_byte_cnt);
1381         }
1382
1383         /*
1384          * Initializing the sampling rate for the device to calculate the
1385          * bandwidth utilization.
1386          */
1387         val64 = MAC_TX_LINK_UTIL_VAL(tmac_util_period) |
1388             MAC_RX_LINK_UTIL_VAL(rmac_util_period);
1389         writeq(val64, &bar0->mac_link_util);
1390
1391
1392         /*
1393          * Initializing the Transmit and Receive Traffic Interrupt
1394          * Scheme.
1395          */
1396         /*
1397          * TTI Initialization. Default Tx timer gets us about
1398          * 250 interrupts per sec. Continuous interrupts are enabled
1399          * by default.
1400          */
1401         if (nic->device_type == XFRAME_II_DEVICE) {
1402                 int count = (nic->config.bus_speed * 125)/2;
1403                 val64 = TTI_DATA1_MEM_TX_TIMER_VAL(count);
1404         } else {
1405
1406                 val64 = TTI_DATA1_MEM_TX_TIMER_VAL(0x2078);
1407         }
1408         val64 |= TTI_DATA1_MEM_TX_URNG_A(0xA) |
1409             TTI_DATA1_MEM_TX_URNG_B(0x10) |
1410             TTI_DATA1_MEM_TX_URNG_C(0x30) | TTI_DATA1_MEM_TX_TIMER_AC_EN;
1411                 if (use_continuous_tx_intrs)
1412                         val64 |= TTI_DATA1_MEM_TX_TIMER_CI_EN;
1413         writeq(val64, &bar0->tti_data1_mem);
1414
1415         val64 = TTI_DATA2_MEM_TX_UFC_A(0x10) |
1416             TTI_DATA2_MEM_TX_UFC_B(0x20) |
1417             TTI_DATA2_MEM_TX_UFC_C(0x40) | TTI_DATA2_MEM_TX_UFC_D(0x80);
1418         writeq(val64, &bar0->tti_data2_mem);
1419
1420         val64 = TTI_CMD_MEM_WE | TTI_CMD_MEM_STROBE_NEW_CMD;
1421         writeq(val64, &bar0->tti_command_mem);
1422
1423         /*
1424          * Once the operation completes, the Strobe bit of the command
1425          * register will be reset. We poll for this particular condition
1426          * We wait for a maximum of 500ms for the operation to complete,
1427          * if it's not complete by then we return error.
1428          */
1429         time = 0;
1430         while (TRUE) {
1431                 val64 = readq(&bar0->tti_command_mem);
1432                 if (!(val64 & TTI_CMD_MEM_STROBE_NEW_CMD)) {
1433                         break;
1434                 }
1435                 if (time > 10) {
1436                         DBG_PRINT(ERR_DBG, "%s: TTI init Failed\n",
1437                                   dev->name);
1438                         return -1;
1439                 }
1440                 msleep(50);
1441                 time++;
1442         }
1443
1444         if (nic->config.bimodal) {
1445                 int k = 0;
1446                 for (k = 0; k < config->rx_ring_num; k++) {
1447                         val64 = TTI_CMD_MEM_WE | TTI_CMD_MEM_STROBE_NEW_CMD;
1448                         val64 |= TTI_CMD_MEM_OFFSET(0x38+k);
1449                         writeq(val64, &bar0->tti_command_mem);
1450
1451                 /*
1452                  * Once the operation completes, the Strobe bit of the command
1453                  * register will be reset. We poll for this particular condition
1454                  * We wait for a maximum of 500ms for the operation to complete,
1455                  * if it's not complete by then we return error.
1456                 */
1457                         time = 0;
1458                         while (TRUE) {
1459                                 val64 = readq(&bar0->tti_command_mem);
1460                                 if (!(val64 & TTI_CMD_MEM_STROBE_NEW_CMD)) {
1461                                         break;
1462                                 }
1463                                 if (time > 10) {
1464                                         DBG_PRINT(ERR_DBG,
1465                                                 "%s: TTI init Failed\n",
1466                                         dev->name);
1467                                         return -1;
1468                                 }
1469                                 time++;
1470                                 msleep(50);
1471                         }
1472                 }
1473         } else {
1474
1475                 /* RTI Initialization */
1476                 if (nic->device_type == XFRAME_II_DEVICE) {
1477                         /*
1478                          * Programmed to generate Apprx 500 Intrs per
1479                          * second
1480                          */
1481                         int count = (nic->config.bus_speed * 125)/4;
1482                         val64 = RTI_DATA1_MEM_RX_TIMER_VAL(count);
1483                 } else {
1484                         val64 = RTI_DATA1_MEM_RX_TIMER_VAL(0xFFF);
1485                 }
1486                 val64 |= RTI_DATA1_MEM_RX_URNG_A(0xA) |
1487                     RTI_DATA1_MEM_RX_URNG_B(0x10) |
1488                     RTI_DATA1_MEM_RX_URNG_C(0x30) | RTI_DATA1_MEM_RX_TIMER_AC_EN;
1489
1490                 writeq(val64, &bar0->rti_data1_mem);
1491
1492                 val64 = RTI_DATA2_MEM_RX_UFC_A(0x1) |
1493                     RTI_DATA2_MEM_RX_UFC_B(0x2) ;
1494                 if (nic->intr_type == MSI_X)
1495                     val64 |= (RTI_DATA2_MEM_RX_UFC_C(0x20) | \
1496                                 RTI_DATA2_MEM_RX_UFC_D(0x40));
1497                 else
1498                     val64 |= (RTI_DATA2_MEM_RX_UFC_C(0x40) | \
1499                                 RTI_DATA2_MEM_RX_UFC_D(0x80));
1500                 writeq(val64, &bar0->rti_data2_mem);
1501
1502                 for (i = 0; i < config->rx_ring_num; i++) {
1503                         val64 = RTI_CMD_MEM_WE | RTI_CMD_MEM_STROBE_NEW_CMD
1504                                         | RTI_CMD_MEM_OFFSET(i);
1505                         writeq(val64, &bar0->rti_command_mem);
1506
1507                         /*
1508                          * Once the operation completes, the Strobe bit of the
1509                          * command register will be reset. We poll for this
1510                          * particular condition. We wait for a maximum of 500ms
1511                          * for the operation to complete, if it's not complete
1512                          * by then we return error.
1513                          */
1514                         time = 0;
1515                         while (TRUE) {
1516                                 val64 = readq(&bar0->rti_command_mem);
1517                                 if (!(val64 & RTI_CMD_MEM_STROBE_NEW_CMD)) {
1518                                         break;
1519                                 }
1520                                 if (time > 10) {
1521                                         DBG_PRINT(ERR_DBG, "%s: RTI init Failed\n",
1522                                                   dev->name);
1523                                         return -1;
1524                                 }
1525                                 time++;
1526                                 msleep(50);
1527                         }
1528                 }
1529         }
1530
1531         /*
1532          * Initializing proper values as Pause threshold into all
1533          * the 8 Queues on Rx side.
1534          */
1535         writeq(0xffbbffbbffbbffbbULL, &bar0->mc_pause_thresh_q0q3);
1536         writeq(0xffbbffbbffbbffbbULL, &bar0->mc_pause_thresh_q4q7);
1537
1538         /* Disable RMAC PAD STRIPPING */
1539         add = &bar0->mac_cfg;
1540         val64 = readq(&bar0->mac_cfg);
1541         val64 &= ~(MAC_CFG_RMAC_STRIP_PAD);
1542         writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
1543         writel((u32) (val64), add);
1544         writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
1545         writel((u32) (val64 >> 32), (add + 4));
1546         val64 = readq(&bar0->mac_cfg);
1547
1548         /* Enable FCS stripping by adapter */
1549         add = &bar0->mac_cfg;
1550         val64 = readq(&bar0->mac_cfg);
1551         val64 |= MAC_CFG_RMAC_STRIP_FCS;
1552         if (nic->device_type == XFRAME_II_DEVICE)
1553                 writeq(val64, &bar0->mac_cfg);
1554         else {
1555                 writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
1556                 writel((u32) (val64), add);
1557                 writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
1558                 writel((u32) (val64 >> 32), (add + 4));
1559         }
1560
1561         /*
1562          * Set the time value to be inserted in the pause frame
1563          * generated by xena.
1564          */
1565         val64 = readq(&bar0->rmac_pause_cfg);
1566         val64 &= ~(RMAC_PAUSE_HG_PTIME(0xffff));
1567         val64 |= RMAC_PAUSE_HG_PTIME(nic->mac_control.rmac_pause_time);
1568         writeq(val64, &bar0->rmac_pause_cfg);
1569
1570         /*
1571          * Set the Threshold Limit for Generating the pause frame
1572          * If the amount of data in any Queue exceeds ratio of
1573          * (mac_control.mc_pause_threshold_q0q3 or q4q7)/256
1574          * pause frame is generated
1575          */
1576         val64 = 0;
1577         for (i = 0; i < 4; i++) {
1578                 val64 |=
1579                     (((u64) 0xFF00 | nic->mac_control.
1580                       mc_pause_threshold_q0q3)
1581                      << (i * 2 * 8));
1582         }
1583         writeq(val64, &bar0->mc_pause_thresh_q0q3);
1584
1585         val64 = 0;
1586         for (i = 0; i < 4; i++) {
1587                 val64 |=
1588                     (((u64) 0xFF00 | nic->mac_control.
1589                       mc_pause_threshold_q4q7)
1590                      << (i * 2 * 8));
1591         }
1592         writeq(val64, &bar0->mc_pause_thresh_q4q7);
1593
1594         /*
1595          * TxDMA will stop Read request if the number of read split has
1596          * exceeded the limit pointed by shared_splits
1597          */
1598         val64 = readq(&bar0->pic_control);
1599         val64 |= PIC_CNTL_SHARED_SPLITS(shared_splits);
1600         writeq(val64, &bar0->pic_control);
1601
1602         if (nic->config.bus_speed == 266) {
1603                 writeq(TXREQTO_VAL(0x7f) | TXREQTO_EN, &bar0->txreqtimeout);
1604                 writeq(0x0, &bar0->read_retry_delay);
1605                 writeq(0x0, &bar0->write_retry_delay);
1606         }
1607
1608         /*
1609          * Programming the Herc to split every write transaction
1610          * that does not start on an ADB to reduce disconnects.
1611          */
1612         if (nic->device_type == XFRAME_II_DEVICE) {
1613                 val64 = FAULT_BEHAVIOUR | EXT_REQ_EN |
1614                         MISC_LINK_STABILITY_PRD(3);
1615                 writeq(val64, &bar0->misc_control);
1616                 val64 = readq(&bar0->pic_control2);
1617                 val64 &= ~(BIT(13)|BIT(14)|BIT(15));
1618                 writeq(val64, &bar0->pic_control2);
1619         }
1620         if (strstr(nic->product_name, "CX4")) {
1621                 val64 = TMAC_AVG_IPG(0x17);
1622                 writeq(val64, &bar0->tmac_avg_ipg);
1623         }
1624
1625         return SUCCESS;
1626 }
1627 #define LINK_UP_DOWN_INTERRUPT          1
1628 #define MAC_RMAC_ERR_TIMER              2
1629
1630 static int s2io_link_fault_indication(struct s2io_nic *nic)
1631 {
1632         if (nic->intr_type != INTA)
1633                 return MAC_RMAC_ERR_TIMER;
1634         if (nic->device_type == XFRAME_II_DEVICE)
1635                 return LINK_UP_DOWN_INTERRUPT;
1636         else
1637                 return MAC_RMAC_ERR_TIMER;
1638 }
1639
1640 /**
1641  *  en_dis_able_nic_intrs - Enable or Disable the interrupts
1642  *  @nic: device private variable,
1643  *  @mask: A mask indicating which Intr block must be modified and,
1644  *  @flag: A flag indicating whether to enable or disable the Intrs.
1645  *  Description: This function will either disable or enable the interrupts
1646  *  depending on the flag argument. The mask argument can be used to
1647  *  enable/disable any Intr block.
1648  *  Return Value: NONE.
1649  */
1650
1651 static void en_dis_able_nic_intrs(struct s2io_nic *nic, u16 mask, int flag)
1652 {
1653         struct XENA_dev_config __iomem *bar0 = nic->bar0;
1654         register u64 val64 = 0, temp64 = 0;
1655
1656         /*  Top level interrupt classification */
1657         /*  PIC Interrupts */
1658         if ((mask & (TX_PIC_INTR | RX_PIC_INTR))) {
1659                 /*  Enable PIC Intrs in the general intr mask register */
1660                 val64 = TXPIC_INT_M;
1661                 if (flag == ENABLE_INTRS) {
1662                         temp64 = readq(&bar0->general_int_mask);
1663                         temp64 &= ~((u64) val64);
1664                         writeq(temp64, &bar0->general_int_mask);
1665                         /*
1666                          * If Hercules adapter enable GPIO otherwise
1667                          * disable all PCIX, Flash, MDIO, IIC and GPIO
1668                          * interrupts for now.
1669                          * TODO
1670                          */
1671                         if (s2io_link_fault_indication(nic) ==
1672                                         LINK_UP_DOWN_INTERRUPT ) {
1673                                 temp64 = readq(&bar0->pic_int_mask);
1674                                 temp64 &= ~((u64) PIC_INT_GPIO);
1675                                 writeq(temp64, &bar0->pic_int_mask);
1676                                 temp64 = readq(&bar0->gpio_int_mask);
1677                                 temp64 &= ~((u64) GPIO_INT_MASK_LINK_UP);
1678                                 writeq(temp64, &bar0->gpio_int_mask);
1679                         } else {
1680                                 writeq(DISABLE_ALL_INTRS, &bar0->pic_int_mask);
1681                         }
1682                         /*
1683                          * No MSI Support is available presently, so TTI and
1684                          * RTI interrupts are also disabled.
1685                          */
1686                 } else if (flag == DISABLE_INTRS) {
1687                         /*
1688                          * Disable PIC Intrs in the general
1689                          * intr mask register
1690                          */
1691                         writeq(DISABLE_ALL_INTRS, &bar0->pic_int_mask);
1692                         temp64 = readq(&bar0->general_int_mask);
1693                         val64 |= temp64;
1694                         writeq(val64, &bar0->general_int_mask);
1695                 }
1696         }
1697
1698         /*  MAC Interrupts */
1699         /*  Enabling/Disabling MAC interrupts */
1700         if (mask & (TX_MAC_INTR | RX_MAC_INTR)) {
1701                 val64 = TXMAC_INT_M | RXMAC_INT_M;
1702                 if (flag == ENABLE_INTRS) {
1703                         temp64 = readq(&bar0->general_int_mask);
1704                         temp64 &= ~((u64) val64);
1705                         writeq(temp64, &bar0->general_int_mask);
1706                         /*
1707                          * All MAC block error interrupts are disabled for now
1708                          * TODO
1709                          */
1710                 } else if (flag == DISABLE_INTRS) {
1711                         /*
1712                          * Disable MAC Intrs in the general intr mask register
1713                          */
1714                         writeq(DISABLE_ALL_INTRS, &bar0->mac_int_mask);
1715                         writeq(DISABLE_ALL_INTRS,
1716                                &bar0->mac_rmac_err_mask);
1717
1718                         temp64 = readq(&bar0->general_int_mask);
1719                         val64 |= temp64;
1720                         writeq(val64, &bar0->general_int_mask);
1721                 }
1722         }
1723
1724         /*  Tx traffic interrupts */
1725         if (mask & TX_TRAFFIC_INTR) {
1726                 val64 = TXTRAFFIC_INT_M;
1727                 if (flag == ENABLE_INTRS) {
1728                         temp64 = readq(&bar0->general_int_mask);
1729                         temp64 &= ~((u64) val64);
1730                         writeq(temp64, &bar0->general_int_mask);
1731                         /*
1732                          * Enable all the Tx side interrupts
1733                          * writing 0 Enables all 64 TX interrupt levels
1734                          */
1735                         writeq(0x0, &bar0->tx_traffic_mask);
1736                 } else if (flag == DISABLE_INTRS) {
1737                         /*
1738                          * Disable Tx Traffic Intrs in the general intr mask
1739                          * register.
1740                          */
1741                         writeq(DISABLE_ALL_INTRS, &bar0->tx_traffic_mask);
1742                         temp64 = readq(&bar0->general_int_mask);
1743                         val64 |= temp64;
1744                         writeq(val64, &bar0->general_int_mask);
1745                 }
1746         }
1747
1748         /*  Rx traffic interrupts */
1749         if (mask & RX_TRAFFIC_INTR) {
1750                 val64 = RXTRAFFIC_INT_M;
1751                 if (flag == ENABLE_INTRS) {
1752                         temp64 = readq(&bar0->general_int_mask);
1753                         temp64 &= ~((u64) val64);
1754                         writeq(temp64, &bar0->general_int_mask);
1755                         /* writing 0 Enables all 8 RX interrupt levels */
1756                         writeq(0x0, &bar0->rx_traffic_mask);
1757                 } else if (flag == DISABLE_INTRS) {
1758                         /*
1759                          * Disable Rx Traffic Intrs in the general intr mask
1760                          * register.
1761                          */
1762                         writeq(DISABLE_ALL_INTRS, &bar0->rx_traffic_mask);
1763                         temp64 = readq(&bar0->general_int_mask);
1764                         val64 |= temp64;
1765                         writeq(val64, &bar0->general_int_mask);
1766                 }
1767         }
1768 }
1769
1770 /**
1771  *  verify_pcc_quiescent- Checks for PCC quiescent state
1772  *  Return: 1 If PCC is quiescence
1773  *          0 If PCC is not quiescence
1774  */
1775 static int verify_pcc_quiescent(struct s2io_nic *sp, int flag)
1776 {
1777         int ret = 0, herc;
1778         struct XENA_dev_config __iomem *bar0 = sp->bar0;
1779         u64 val64 = readq(&bar0->adapter_status);
1780
1781         herc = (sp->device_type == XFRAME_II_DEVICE);
1782
1783         if (flag == FALSE) {
1784                 if ((!herc && (get_xena_rev_id(sp->pdev) >= 4)) || herc) {
1785                         if (!(val64 & ADAPTER_STATUS_RMAC_PCC_IDLE))
1786                                 ret = 1;
1787                 } else {
1788                         if (!(val64 & ADAPTER_STATUS_RMAC_PCC_FOUR_IDLE))
1789                                 ret = 1;
1790                 }
1791         } else {
1792                 if ((!herc && (get_xena_rev_id(sp->pdev) >= 4)) || herc) {
1793                         if (((val64 & ADAPTER_STATUS_RMAC_PCC_IDLE) ==
1794                              ADAPTER_STATUS_RMAC_PCC_IDLE))
1795                                 ret = 1;
1796                 } else {
1797                         if (((val64 & ADAPTER_STATUS_RMAC_PCC_FOUR_IDLE) ==
1798                              ADAPTER_STATUS_RMAC_PCC_FOUR_IDLE))
1799                                 ret = 1;
1800                 }
1801         }
1802
1803         return ret;
1804 }
1805 /**
1806  *  verify_xena_quiescence - Checks whether the H/W is ready
1807  *  Description: Returns whether the H/W is ready to go or not. Depending
1808  *  on whether adapter enable bit was written or not the comparison
1809  *  differs and the calling function passes the input argument flag to
1810  *  indicate this.
1811  *  Return: 1 If xena is quiescence
1812  *          0 If Xena is not quiescence
1813  */
1814
1815 static int verify_xena_quiescence(struct s2io_nic *sp)
1816 {
1817         int  mode;
1818         struct XENA_dev_config __iomem *bar0 = sp->bar0;
1819         u64 val64 = readq(&bar0->adapter_status);
1820         mode = s2io_verify_pci_mode(sp);
1821
1822         if (!(val64 & ADAPTER_STATUS_TDMA_READY)) {
1823                 DBG_PRINT(ERR_DBG, "%s", "TDMA is not ready!");
1824                 return 0;
1825         }
1826         if (!(val64 & ADAPTER_STATUS_RDMA_READY)) {
1827         DBG_PRINT(ERR_DBG, "%s", "RDMA is not ready!");
1828                 return 0;
1829         }
1830         if (!(val64 & ADAPTER_STATUS_PFC_READY)) {
1831                 DBG_PRINT(ERR_DBG, "%s", "PFC is not ready!");
1832                 return 0;
1833         }
1834         if (!(val64 & ADAPTER_STATUS_TMAC_BUF_EMPTY)) {
1835                 DBG_PRINT(ERR_DBG, "%s", "TMAC BUF is not empty!");
1836                 return 0;
1837         }
1838         if (!(val64 & ADAPTER_STATUS_PIC_QUIESCENT)) {
1839                 DBG_PRINT(ERR_DBG, "%s", "PIC is not QUIESCENT!");
1840                 return 0;
1841         }
1842         if (!(val64 & ADAPTER_STATUS_MC_DRAM_READY)) {
1843                 DBG_PRINT(ERR_DBG, "%s", "MC_DRAM is not ready!");
1844                 return 0;
1845         }
1846         if (!(val64 & ADAPTER_STATUS_MC_QUEUES_READY)) {
1847                 DBG_PRINT(ERR_DBG, "%s", "MC_QUEUES is not ready!");
1848                 return 0;
1849         }
1850         if (!(val64 & ADAPTER_STATUS_M_PLL_LOCK)) {
1851                 DBG_PRINT(ERR_DBG, "%s", "M_PLL is not locked!");
1852                 return 0;
1853         }
1854
1855         /*
1856          * In PCI 33 mode, the P_PLL is not used, and therefore,
1857          * the the P_PLL_LOCK bit in the adapter_status register will
1858          * not be asserted.
1859          */
1860         if (!(val64 & ADAPTER_STATUS_P_PLL_LOCK) &&
1861                 sp->device_type == XFRAME_II_DEVICE && mode !=
1862                 PCI_MODE_PCI_33) {
1863                 DBG_PRINT(ERR_DBG, "%s", "P_PLL is not locked!");
1864                 return 0;
1865         }
1866         if (!((val64 & ADAPTER_STATUS_RC_PRC_QUIESCENT) ==
1867                         ADAPTER_STATUS_RC_PRC_QUIESCENT)) {
1868                 DBG_PRINT(ERR_DBG, "%s", "RC_PRC is not QUIESCENT!");
1869                 return 0;
1870         }
1871         return 1;
1872 }
1873
1874 /**
1875  * fix_mac_address -  Fix for Mac addr problem on Alpha platforms
1876  * @sp: Pointer to device specifc structure
1877  * Description :
1878  * New procedure to clear mac address reading  problems on Alpha platforms
1879  *
1880  */
1881
1882 static void fix_mac_address(struct s2io_nic * sp)
1883 {
1884         struct XENA_dev_config __iomem *bar0 = sp->bar0;
1885         u64 val64;
1886         int i = 0;
1887
1888         while (fix_mac[i] != END_SIGN) {
1889                 writeq(fix_mac[i++], &bar0->gpio_control);
1890                 udelay(10);
1891                 val64 = readq(&bar0->gpio_control);
1892         }
1893 }
1894
1895 /**
1896  *  start_nic - Turns the device on
1897  *  @nic : device private variable.
1898  *  Description:
1899  *  This function actually turns the device on. Before this  function is
1900  *  called,all Registers are configured from their reset states
1901  *  and shared memory is allocated but the NIC is still quiescent. On
1902  *  calling this function, the device interrupts are cleared and the NIC is
1903  *  literally switched on by writing into the adapter control register.
1904  *  Return Value:
1905  *  SUCCESS on success and -1 on failure.
1906  */
1907
1908 static int start_nic(struct s2io_nic *nic)
1909 {
1910         struct XENA_dev_config __iomem *bar0 = nic->bar0;
1911         struct net_device *dev = nic->dev;
1912         register u64 val64 = 0;
1913         u16 subid, i;
1914         struct mac_info *mac_control;
1915         struct config_param *config;
1916
1917         mac_control = &nic->mac_control;
1918         config = &nic->config;
1919
1920         /*  PRC Initialization and configuration */
1921         for (i = 0; i < config->rx_ring_num; i++) {
1922                 writeq((u64) mac_control->rings[i].rx_blocks[0].block_dma_addr,
1923                        &bar0->prc_rxd0_n[i]);
1924
1925                 val64 = readq(&bar0->prc_ctrl_n[i]);
1926                 if (nic->config.bimodal)
1927                         val64 |= PRC_CTRL_BIMODAL_INTERRUPT;
1928                 if (nic->rxd_mode == RXD_MODE_1)
1929                         val64 |= PRC_CTRL_RC_ENABLED;
1930                 else
1931                         val64 |= PRC_CTRL_RC_ENABLED | PRC_CTRL_RING_MODE_3;
1932                 if (nic->device_type == XFRAME_II_DEVICE)
1933                         val64 |= PRC_CTRL_GROUP_READS;
1934                 val64 &= ~PRC_CTRL_RXD_BACKOFF_INTERVAL(0xFFFFFF);
1935                 val64 |= PRC_CTRL_RXD_BACKOFF_INTERVAL(0x1000);
1936                 writeq(val64, &bar0->prc_ctrl_n[i]);
1937         }
1938
1939         if (nic->rxd_mode == RXD_MODE_3B) {
1940                 /* Enabling 2 buffer mode by writing into Rx_pa_cfg reg. */
1941                 val64 = readq(&bar0->rx_pa_cfg);
1942                 val64 |= RX_PA_CFG_IGNORE_L2_ERR;
1943                 writeq(val64, &bar0->rx_pa_cfg);
1944         }
1945
1946         /*
1947          * Enabling MC-RLDRAM. After enabling the device, we timeout
1948          * for around 100ms, which is approximately the time required
1949          * for the device to be ready for operation.
1950          */
1951         val64 = readq(&bar0->mc_rldram_mrs);
1952         val64 |= MC_RLDRAM_QUEUE_SIZE_ENABLE | MC_RLDRAM_MRS_ENABLE;
1953         SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_mrs, UF);
1954         val64 = readq(&bar0->mc_rldram_mrs);
1955
1956         msleep(100);    /* Delay by around 100 ms. */
1957
1958         /* Enabling ECC Protection. */
1959         val64 = readq(&bar0->adapter_control);
1960         val64 &= ~ADAPTER_ECC_EN;
1961         writeq(val64, &bar0->adapter_control);
1962
1963         /*
1964          * Clearing any possible Link state change interrupts that
1965          * could have popped up just before Enabling the card.
1966          */
1967         val64 = readq(&bar0->mac_rmac_err_reg);
1968         if (val64)
1969                 writeq(val64, &bar0->mac_rmac_err_reg);
1970
1971         /*
1972          * Verify if the device is ready to be enabled, if so enable
1973          * it.
1974          */
1975         val64 = readq(&bar0->adapter_status);
1976         if (!verify_xena_quiescence(nic)) {
1977                 DBG_PRINT(ERR_DBG, "%s: device is not ready, ", dev->name);
1978                 DBG_PRINT(ERR_DBG, "Adapter status reads: 0x%llx\n",
1979                           (unsigned long long) val64);
1980                 return FAILURE;
1981         }
1982
1983         /*
1984          * With some switches, link might be already up at this point.
1985          * Because of this weird behavior, when we enable laser,
1986          * we may not get link. We need to handle this. We cannot
1987          * figure out which switch is misbehaving. So we are forced to
1988          * make a global change.
1989          */
1990
1991         /* Enabling Laser. */
1992         val64 = readq(&bar0->adapter_control);
1993         val64 |= ADAPTER_EOI_TX_ON;
1994         writeq(val64, &bar0->adapter_control);
1995
1996         if (s2io_link_fault_indication(nic) == MAC_RMAC_ERR_TIMER) {
1997                 /*
1998                  * Dont see link state interrupts initally on some switches,
1999                  * so directly scheduling the link state task here.
2000                  */
2001                 schedule_work(&nic->set_link_task);
2002         }
2003         /* SXE-002: Initialize link and activity LED */
2004         subid = nic->pdev->subsystem_device;
2005         if (((subid & 0xFF) >= 0x07) &&
2006             (nic->device_type == XFRAME_I_DEVICE)) {
2007                 val64 = readq(&bar0->gpio_control);
2008                 val64 |= 0x0000800000000000ULL;
2009                 writeq(val64, &bar0->gpio_control);
2010                 val64 = 0x0411040400000000ULL;
2011                 writeq(val64, (void __iomem *)bar0 + 0x2700);
2012         }
2013
2014         return SUCCESS;
2015 }
2016 /**
2017  * s2io_txdl_getskb - Get the skb from txdl, unmap and return skb
2018  */
2019 static struct sk_buff *s2io_txdl_getskb(struct fifo_info *fifo_data, struct \
2020                                         TxD *txdlp, int get_off)
2021 {
2022         struct s2io_nic *nic = fifo_data->nic;
2023         struct sk_buff *skb;
2024         struct TxD *txds;
2025         u16 j, frg_cnt;
2026
2027         txds = txdlp;
2028         if (txds->Host_Control == (u64)(long)nic->ufo_in_band_v) {
2029                 pci_unmap_single(nic->pdev, (dma_addr_t)
2030                         txds->Buffer_Pointer, sizeof(u64),
2031                         PCI_DMA_TODEVICE);
2032                 txds++;
2033         }
2034
2035         skb = (struct sk_buff *) ((unsigned long)
2036                         txds->Host_Control);
2037         if (!skb) {
2038                 memset(txdlp, 0, (sizeof(struct TxD) * fifo_data->max_txds));
2039                 return NULL;
2040         }
2041         pci_unmap_single(nic->pdev, (dma_addr_t)
2042                          txds->Buffer_Pointer,
2043                          skb->len - skb->data_len,
2044                          PCI_DMA_TODEVICE);
2045         frg_cnt = skb_shinfo(skb)->nr_frags;
2046         if (frg_cnt) {
2047                 txds++;
2048                 for (j = 0; j < frg_cnt; j++, txds++) {
2049                         skb_frag_t *frag = &skb_shinfo(skb)->frags[j];
2050                         if (!txds->Buffer_Pointer)
2051                                 break;
2052                         pci_unmap_page(nic->pdev, (dma_addr_t)
2053                                         txds->Buffer_Pointer,
2054                                        frag->size, PCI_DMA_TODEVICE);
2055                 }
2056         }
2057         memset(txdlp,0, (sizeof(struct TxD) * fifo_data->max_txds));
2058         return(skb);
2059 }
2060
2061 /**
2062  *  free_tx_buffers - Free all queued Tx buffers
2063  *  @nic : device private variable.
2064  *  Description:
2065  *  Free all queued Tx buffers.
2066  *  Return Value: void
2067 */
2068
2069 static void free_tx_buffers(struct s2io_nic *nic)
2070 {
2071         struct net_device *dev = nic->dev;
2072         struct sk_buff *skb;
2073         struct TxD *txdp;
2074         int i, j;
2075         struct mac_info *mac_control;
2076         struct config_param *config;
2077         int cnt = 0;
2078
2079         mac_control = &nic->mac_control;
2080         config = &nic->config;
2081
2082         for (i = 0; i < config->tx_fifo_num; i++) {
2083                 for (j = 0; j < config->tx_cfg[i].fifo_len - 1; j++) {
2084                         txdp = (struct TxD *) mac_control->fifos[i].list_info[j].
2085                             list_virt_addr;
2086                         skb = s2io_txdl_getskb(&mac_control->fifos[i], txdp, j);
2087                         if (skb) {
2088                                 dev_kfree_skb(skb);
2089                                 cnt++;
2090                         }
2091                 }
2092                 DBG_PRINT(INTR_DBG,
2093                           "%s:forcibly freeing %d skbs on FIFO%d\n",
2094                           dev->name, cnt, i);
2095                 mac_control->fifos[i].tx_curr_get_info.offset = 0;
2096                 mac_control->fifos[i].tx_curr_put_info.offset = 0;
2097         }
2098 }
2099
2100 /**
2101  *   stop_nic -  To stop the nic
2102  *   @nic ; device private variable.
2103  *   Description:
2104  *   This function does exactly the opposite of what the start_nic()
2105  *   function does. This function is called to stop the device.
2106  *   Return Value:
2107  *   void.
2108  */
2109
2110 static void stop_nic(struct s2io_nic *nic)
2111 {
2112         struct XENA_dev_config __iomem *bar0 = nic->bar0;
2113         register u64 val64 = 0;
2114         u16 interruptible;
2115         struct mac_info *mac_control;
2116         struct config_param *config;
2117
2118         mac_control = &nic->mac_control;
2119         config = &nic->config;
2120
2121         /*  Disable all interrupts */
2122         interruptible = TX_TRAFFIC_INTR | RX_TRAFFIC_INTR;
2123         interruptible |= TX_PIC_INTR | RX_PIC_INTR;
2124         interruptible |= TX_MAC_INTR | RX_MAC_INTR;
2125         en_dis_able_nic_intrs(nic, interruptible, DISABLE_INTRS);
2126
2127         /* Clearing Adapter_En bit of ADAPTER_CONTROL Register */
2128         val64 = readq(&bar0->adapter_control);
2129         val64 &= ~(ADAPTER_CNTL_EN);
2130         writeq(val64, &bar0->adapter_control);
2131 }
2132
2133 static int fill_rxd_3buf(struct s2io_nic *nic, struct RxD_t *rxdp, struct \
2134                                 sk_buff *skb)
2135 {
2136         struct net_device *dev = nic->dev;
2137         struct sk_buff *frag_list;
2138         void *tmp;
2139
2140         /* Buffer-1 receives L3/L4 headers */
2141         ((struct RxD3*)rxdp)->Buffer1_ptr = pci_map_single
2142                         (nic->pdev, skb->data, l3l4hdr_size + 4,
2143                         PCI_DMA_FROMDEVICE);
2144
2145         /* skb_shinfo(skb)->frag_list will have L4 data payload */
2146         skb_shinfo(skb)->frag_list = dev_alloc_skb(dev->mtu + ALIGN_SIZE);
2147         if (skb_shinfo(skb)->frag_list == NULL) {
2148                 DBG_PRINT(ERR_DBG, "%s: dev_alloc_skb failed\n ", dev->name);
2149                 return -ENOMEM ;
2150         }
2151         frag_list = skb_shinfo(skb)->frag_list;
2152         skb->truesize += frag_list->truesize;
2153         frag_list->next = NULL;
2154         tmp = (void *)ALIGN((long)frag_list->data, ALIGN_SIZE + 1);
2155         frag_list->data = tmp;
2156         frag_list->tail = tmp;
2157
2158         /* Buffer-2 receives L4 data payload */
2159         ((struct RxD3*)rxdp)->Buffer2_ptr = pci_map_single(nic->pdev,
2160                                 frag_list->data, dev->mtu,
2161                                 PCI_DMA_FROMDEVICE);
2162         rxdp->Control_2 |= SET_BUFFER1_SIZE_3(l3l4hdr_size + 4);
2163         rxdp->Control_2 |= SET_BUFFER2_SIZE_3(dev->mtu);
2164
2165         return SUCCESS;
2166 }
2167
2168 /**
2169  *  fill_rx_buffers - Allocates the Rx side skbs
2170  *  @nic:  device private variable
2171  *  @ring_no: ring number
2172  *  Description:
2173  *  The function allocates Rx side skbs and puts the physical
2174  *  address of these buffers into the RxD buffer pointers, so that the NIC
2175  *  can DMA the received frame into these locations.
2176  *  The NIC supports 3 receive modes, viz
2177  *  1. single buffer,
2178  *  2. three buffer and
2179  *  3. Five buffer modes.
2180  *  Each mode defines how many fragments the received frame will be split
2181  *  up into by the NIC. The frame is split into L3 header, L4 Header,
2182  *  L4 payload in three buffer mode and in 5 buffer mode, L4 payload itself
2183  *  is split into 3 fragments. As of now only single buffer mode is
2184  *  supported.
2185  *   Return Value:
2186  *  SUCCESS on success or an appropriate -ve value on failure.
2187  */
2188
2189 static int fill_rx_buffers(struct s2io_nic *nic, int ring_no)
2190 {
2191         struct net_device *dev = nic->dev;
2192         struct sk_buff *skb;
2193         struct RxD_t *rxdp;
2194         int off, off1, size, block_no, block_no1;
2195         u32 alloc_tab = 0;
2196         u32 alloc_cnt;
2197         struct mac_info *mac_control;
2198         struct config_param *config;
2199         u64 tmp;
2200         struct buffAdd *ba;
2201         unsigned long flags;
2202         struct RxD_t *first_rxdp = NULL;
2203
2204         mac_control = &nic->mac_control;
2205         config = &nic->config;
2206         alloc_cnt = mac_control->rings[ring_no].pkt_cnt -
2207             atomic_read(&nic->rx_bufs_left[ring_no]);
2208
2209         block_no1 = mac_control->rings[ring_no].rx_curr_get_info.block_index;
2210         off1 = mac_control->rings[ring_no].rx_curr_get_info.offset;
2211         while (alloc_tab < alloc_cnt) {
2212                 block_no = mac_control->rings[ring_no].rx_curr_put_info.
2213                     block_index;
2214                 off = mac_control->rings[ring_no].rx_curr_put_info.offset;
2215
2216                 rxdp = mac_control->rings[ring_no].
2217                                 rx_blocks[block_no].rxds[off].virt_addr;
2218
2219                 if ((block_no == block_no1) && (off == off1) &&
2220                                         (rxdp->Host_Control)) {
2221                         DBG_PRINT(INTR_DBG, "%s: Get and Put",
2222                                   dev->name);
2223                         DBG_PRINT(INTR_DBG, " info equated\n");
2224                         goto end;
2225                 }
2226                 if (off && (off == rxd_count[nic->rxd_mode])) {
2227                         mac_control->rings[ring_no].rx_curr_put_info.
2228                             block_index++;
2229                         if (mac_control->rings[ring_no].rx_curr_put_info.
2230                             block_index == mac_control->rings[ring_no].
2231                                         block_count)
2232                                 mac_control->rings[ring_no].rx_curr_put_info.
2233                                         block_index = 0;
2234                         block_no = mac_control->rings[ring_no].
2235                                         rx_curr_put_info.block_index;
2236                         if (off == rxd_count[nic->rxd_mode])
2237                                 off = 0;
2238                         mac_control->rings[ring_no].rx_curr_put_info.
2239                                 offset = off;
2240                         rxdp = mac_control->rings[ring_no].
2241                                 rx_blocks[block_no].block_virt_addr;
2242                         DBG_PRINT(INTR_DBG, "%s: Next block at: %p\n",
2243                                   dev->name, rxdp);
2244                 }
2245                 if(!napi) {
2246                         spin_lock_irqsave(&nic->put_lock, flags);
2247                         mac_control->rings[ring_no].put_pos =
2248                         (block_no * (rxd_count[nic->rxd_mode] + 1)) + off;
2249                         spin_unlock_irqrestore(&nic->put_lock, flags);
2250                 } else {
2251                         mac_control->rings[ring_no].put_pos =
2252                         (block_no * (rxd_count[nic->rxd_mode] + 1)) + off;
2253                 }
2254                 if ((rxdp->Control_1 & RXD_OWN_XENA) &&
2255                         ((nic->rxd_mode >= RXD_MODE_3A) &&
2256                                 (rxdp->Control_2 & BIT(0)))) {
2257                         mac_control->rings[ring_no].rx_curr_put_info.
2258                                         offset = off;
2259                         goto end;
2260                 }
2261                 /* calculate size of skb based on ring mode */
2262                 size = dev->mtu + HEADER_ETHERNET_II_802_3_SIZE +
2263                                 HEADER_802_2_SIZE + HEADER_SNAP_SIZE;
2264                 if (nic->rxd_mode == RXD_MODE_1)
2265                         size += NET_IP_ALIGN;
2266                 else if (nic->rxd_mode == RXD_MODE_3B)
2267                         size = dev->mtu + ALIGN_SIZE + BUF0_LEN + 4;
2268                 else
2269                         size = l3l4hdr_size + ALIGN_SIZE + BUF0_LEN + 4;
2270
2271                 /* allocate skb */
2272                 skb = dev_alloc_skb(size);
2273                 if(!skb) {
2274                         DBG_PRINT(ERR_DBG, "%s: Out of ", dev->name);
2275                         DBG_PRINT(ERR_DBG, "memory to allocate SKBs\n");
2276                         if (first_rxdp) {
2277                                 wmb();
2278                                 first_rxdp->Control_1 |= RXD_OWN_XENA;
2279                         }
2280                         return -ENOMEM ;
2281                 }
2282                 if (nic->rxd_mode == RXD_MODE_1) {
2283                         /* 1 buffer mode - normal operation mode */
2284                         memset(rxdp, 0, sizeof(struct RxD1));
2285                         skb_reserve(skb, NET_IP_ALIGN);
2286                         ((struct RxD1*)rxdp)->Buffer0_ptr = pci_map_single
2287                             (nic->pdev, skb->data, size - NET_IP_ALIGN,
2288                                 PCI_DMA_FROMDEVICE);
2289                         rxdp->Control_2 = SET_BUFFER0_SIZE_1(size - NET_IP_ALIGN);
2290
2291                 } else if (nic->rxd_mode >= RXD_MODE_3A) {
2292                         /*
2293                          * 2 or 3 buffer mode -
2294                          * Both 2 buffer mode and 3 buffer mode provides 128
2295                          * byte aligned receive buffers.
2296                          *
2297                          * 3 buffer mode provides header separation where in
2298                          * skb->data will have L3/L4 headers where as
2299                          * skb_shinfo(skb)->frag_list will have the L4 data
2300                          * payload
2301                          */
2302
2303                         memset(rxdp, 0, sizeof(struct RxD3));
2304                         ba = &mac_control->rings[ring_no].ba[block_no][off];
2305                         skb_reserve(skb, BUF0_LEN);
2306                         tmp = (u64)(unsigned long) skb->data;
2307                         tmp += ALIGN_SIZE;
2308                         tmp &= ~ALIGN_SIZE;
2309                         skb->data = (void *) (unsigned long)tmp;
2310                         skb->tail = (void *) (unsigned long)tmp;
2311
2312                         if (!(((struct RxD3*)rxdp)->Buffer0_ptr))
2313                                 ((struct RxD3*)rxdp)->Buffer0_ptr =
2314                                    pci_map_single(nic->pdev, ba->ba_0, BUF0_LEN,
2315                                            PCI_DMA_FROMDEVICE);
2316                         else
2317                                 pci_dma_sync_single_for_device(nic->pdev,
2318                                     (dma_addr_t) ((struct RxD3*)rxdp)->Buffer0_ptr,
2319                                     BUF0_LEN, PCI_DMA_FROMDEVICE);
2320                         rxdp->Control_2 = SET_BUFFER0_SIZE_3(BUF0_LEN);
2321                         if (nic->rxd_mode == RXD_MODE_3B) {
2322                                 /* Two buffer mode */
2323
2324                                 /*
2325                                  * Buffer2 will have L3/L4 header plus
2326                                  * L4 payload
2327                                  */
2328                                 ((struct RxD3*)rxdp)->Buffer2_ptr = pci_map_single
2329                                 (nic->pdev, skb->data, dev->mtu + 4,
2330                                                 PCI_DMA_FROMDEVICE);
2331
2332                                 /* Buffer-1 will be dummy buffer. Not used */
2333                                 if (!(((struct RxD3*)rxdp)->Buffer1_ptr)) {
2334                                         ((struct RxD3*)rxdp)->Buffer1_ptr =
2335                                                 pci_map_single(nic->pdev,
2336                                                 ba->ba_1, BUF1_LEN,
2337                                                 PCI_DMA_FROMDEVICE);
2338                                 }
2339                                 rxdp->Control_2 |= SET_BUFFER1_SIZE_3(1);
2340                                 rxdp->Control_2 |= SET_BUFFER2_SIZE_3
2341                                                                 (dev->mtu + 4);
2342                         } else {
2343                                 /* 3 buffer mode */
2344                                 if (fill_rxd_3buf(nic, rxdp, skb) == -ENOMEM) {
2345                                         dev_kfree_skb_irq(skb);
2346                                         if (first_rxdp) {
2347                                                 wmb();
2348                                                 first_rxdp->Control_1 |=
2349                                                         RXD_OWN_XENA;
2350                                         }
2351                                         return -ENOMEM ;
2352                                 }
2353                         }
2354                         rxdp->Control_2 |= BIT(0);
2355                 }
2356                 rxdp->Host_Control = (unsigned long) (skb);
2357                 if (alloc_tab & ((1 << rxsync_frequency) - 1))
2358                         rxdp->Control_1 |= RXD_OWN_XENA;
2359                 off++;
2360                 if (off == (rxd_count[nic->rxd_mode] + 1))
2361                         off = 0;
2362                 mac_control->rings[ring_no].rx_curr_put_info.offset = off;
2363
2364                 rxdp->Control_2 |= SET_RXD_MARKER;
2365                 if (!(alloc_tab & ((1 << rxsync_frequency) - 1))) {
2366                         if (first_rxdp) {
2367                                 wmb();
2368                                 first_rxdp->Control_1 |= RXD_OWN_XENA;
2369                         }
2370                         first_rxdp = rxdp;
2371                 }
2372                 atomic_inc(&nic->rx_bufs_left[ring_no]);
2373                 alloc_tab++;
2374         }
2375
2376       end:
2377         /* Transfer ownership of first descriptor to adapter just before
2378          * exiting. Before that, use memory barrier so that ownership
2379          * and other fields are seen by adapter correctly.
2380          */
2381         if (first_rxdp) {
2382                 wmb();
2383                 first_rxdp->Control_1 |= RXD_OWN_XENA;
2384         }
2385
2386         return SUCCESS;
2387 }
2388
2389 static void free_rxd_blk(struct s2io_nic *sp, int ring_no, int blk)
2390 {
2391         struct net_device *dev = sp->dev;
2392         int j;
2393         struct sk_buff *skb;
2394         struct RxD_t *rxdp;
2395         struct mac_info *mac_control;
2396         struct buffAdd *ba;
2397
2398         mac_control = &sp->mac_control;
2399         for (j = 0 ; j < rxd_count[sp->rxd_mode]; j++) {
2400                 rxdp = mac_control->rings[ring_no].
2401                                 rx_blocks[blk].rxds[j].virt_addr;
2402                 skb = (struct sk_buff *)
2403                         ((unsigned long) rxdp->Host_Control);
2404                 if (!skb) {
2405                         continue;
2406                 }
2407                 if (sp->rxd_mode == RXD_MODE_1) {
2408                         pci_unmap_single(sp->pdev, (dma_addr_t)
2409                                  ((struct RxD1*)rxdp)->Buffer0_ptr,
2410                                  dev->mtu +
2411                                  HEADER_ETHERNET_II_802_3_SIZE
2412                                  + HEADER_802_2_SIZE +
2413                                  HEADER_SNAP_SIZE,
2414                                  PCI_DMA_FROMDEVICE);
2415                         memset(rxdp, 0, sizeof(struct RxD1));
2416                 } else if(sp->rxd_mode == RXD_MODE_3B) {
2417                         ba = &mac_control->rings[ring_no].
2418                                 ba[blk][j];
2419                         pci_unmap_single(sp->pdev, (dma_addr_t)
2420                                  ((struct RxD3*)rxdp)->Buffer0_ptr,
2421                                  BUF0_LEN,
2422                                  PCI_DMA_FROMDEVICE);
2423                         pci_unmap_single(sp->pdev, (dma_addr_t)
2424                                  ((struct RxD3*)rxdp)->Buffer1_ptr,
2425                                  BUF1_LEN,
2426                                  PCI_DMA_FROMDEVICE);
2427                         pci_unmap_single(sp->pdev, (dma_addr_t)
2428                                  ((struct RxD3*)rxdp)->Buffer2_ptr,
2429                                  dev->mtu + 4,
2430                                  PCI_DMA_FROMDEVICE);
2431                         memset(rxdp, 0, sizeof(struct RxD3));
2432                 } else {
2433                         pci_unmap_single(sp->pdev, (dma_addr_t)
2434                                 ((struct RxD3*)rxdp)->Buffer0_ptr, BUF0_LEN,
2435                                 PCI_DMA_FROMDEVICE);
2436                         pci_unmap_single(sp->pdev, (dma_addr_t)
2437                                 ((struct RxD3*)rxdp)->Buffer1_ptr,
2438                                 l3l4hdr_size + 4,
2439                                 PCI_DMA_FROMDEVICE);
2440                         pci_unmap_single(sp->pdev, (dma_addr_t)
2441                                 ((struct RxD3*)rxdp)->Buffer2_ptr, dev->mtu,
2442                                 PCI_DMA_FROMDEVICE);
2443                         memset(rxdp, 0, sizeof(struct RxD3));
2444                 }
2445                 dev_kfree_skb(skb);
2446                 atomic_dec(&sp->rx_bufs_left[ring_no]);
2447         }
2448 }
2449
2450 /**
2451  *  free_rx_buffers - Frees all Rx buffers
2452  *  @sp: device private variable.
2453  *  Description:
2454  *  This function will free all Rx buffers allocated by host.
2455  *  Return Value:
2456  *  NONE.
2457  */
2458
2459 static void free_rx_buffers(struct s2io_nic *sp)
2460 {
2461         struct net_device *dev = sp->dev;
2462         int i, blk = 0, buf_cnt = 0;
2463         struct mac_info *mac_control;
2464         struct config_param *config;
2465
2466         mac_control = &sp->mac_control;
2467         config = &sp->config;
2468
2469         for (i = 0; i < config->rx_ring_num; i++) {
2470                 for (blk = 0; blk < rx_ring_sz[i]; blk++)
2471                         free_rxd_blk(sp,i,blk);
2472
2473                 mac_control->rings[i].rx_curr_put_info.block_index = 0;
2474                 mac_control->rings[i].rx_curr_get_info.block_index = 0;
2475                 mac_control->rings[i].rx_curr_put_info.offset = 0;
2476                 mac_control->rings[i].rx_curr_get_info.offset = 0;
2477                 atomic_set(&sp->rx_bufs_left[i], 0);
2478                 DBG_PRINT(INIT_DBG, "%s:Freed 0x%x Rx Buffers on ring%d\n",
2479                           dev->name, buf_cnt, i);
2480         }
2481 }
2482
2483 /**
2484  * s2io_poll - Rx interrupt handler for NAPI support
2485  * @dev : pointer to the device structure.
2486  * @budget : The number of packets that were budgeted to be processed
2487  * during  one pass through the 'Poll" function.
2488  * Description:
2489  * Comes into picture only if NAPI support has been incorporated. It does
2490  * the same thing that rx_intr_handler does, but not in a interrupt context
2491  * also It will process only a given number of packets.
2492  * Return value:
2493  * 0 on success and 1 if there are No Rx packets to be processed.
2494  */
2495
2496 static int s2io_poll(struct net_device *dev, int *budget)
2497 {
2498         struct s2io_nic *nic = dev->priv;
2499         int pkt_cnt = 0, org_pkts_to_process;
2500         struct mac_info *mac_control;
2501         struct config_param *config;
2502         struct XENA_dev_config __iomem *bar0 = nic->bar0;
2503         int i;
2504
2505         atomic_inc(&nic->isr_cnt);
2506         mac_control = &nic->mac_control;
2507         config = &nic->config;
2508
2509         nic->pkts_to_process = *budget;
2510         if (nic->pkts_to_process > dev->quota)
2511                 nic->pkts_to_process = dev->quota;
2512         org_pkts_to_process = nic->pkts_to_process;
2513
2514         writeq(S2IO_MINUS_ONE, &bar0->rx_traffic_int);
2515         readl(&bar0->rx_traffic_int);
2516
2517         for (i = 0; i < config->rx_ring_num; i++) {
2518                 rx_intr_handler(&mac_control->rings[i]);
2519                 pkt_cnt = org_pkts_to_process - nic->pkts_to_process;
2520                 if (!nic->pkts_to_process) {
2521                         /* Quota for the current iteration has been met */
2522                         goto no_rx;
2523                 }
2524         }
2525         if (!pkt_cnt)
2526                 pkt_cnt = 1;
2527
2528         dev->quota -= pkt_cnt;
2529         *budget -= pkt_cnt;
2530         netif_rx_complete(dev);
2531
2532         for (i = 0; i < config->rx_ring_num; i++) {
2533                 if (fill_rx_buffers(nic, i) == -ENOMEM) {
2534                         DBG_PRINT(ERR_DBG, "%s:Out of memory", dev->name);
2535                         DBG_PRINT(ERR_DBG, " in Rx Poll!!\n");
2536                         break;
2537                 }
2538         }
2539         /* Re enable the Rx interrupts. */
2540         writeq(0x0, &bar0->rx_traffic_mask);
2541         readl(&bar0->rx_traffic_mask);
2542         atomic_dec(&nic->isr_cnt);
2543         return 0;
2544
2545 no_rx:
2546         dev->quota -= pkt_cnt;
2547         *budget -= pkt_cnt;
2548
2549         for (i = 0; i < config->rx_ring_num; i++) {
2550                 if (fill_rx_buffers(nic, i) == -ENOMEM) {
2551                         DBG_PRINT(ERR_DBG, "%s:Out of memory", dev->name);
2552                         DBG_PRINT(ERR_DBG, " in Rx Poll!!\n");
2553                         break;
2554                 }
2555         }
2556         atomic_dec(&nic->isr_cnt);
2557         return 1;
2558 }
2559
2560 #ifdef CONFIG_NET_POLL_CONTROLLER
2561 /**
2562  * s2io_netpoll - netpoll event handler entry point
2563  * @dev : pointer to the device structure.
2564  * Description:
2565  *      This function will be called by upper layer to check for events on the
2566  * interface in situations where interrupts are disabled. It is used for
2567  * specific in-kernel networking tasks, such as remote consoles and kernel
2568  * debugging over the network (example netdump in RedHat).
2569  */
2570 static void s2io_netpoll(struct net_device *dev)
2571 {
2572         struct s2io_nic *nic = dev->priv;
2573         struct mac_info *mac_control;
2574         struct config_param *config;
2575         struct XENA_dev_config __iomem *bar0 = nic->bar0;
2576         u64 val64 = 0xFFFFFFFFFFFFFFFFULL;
2577         int i;
2578
2579         disable_irq(dev->irq);
2580
2581         atomic_inc(&nic->isr_cnt);
2582         mac_control = &nic->mac_control;
2583         config = &nic->config;
2584
2585         writeq(val64, &bar0->rx_traffic_int);
2586         writeq(val64, &bar0->tx_traffic_int);
2587
2588         /* we need to free up the transmitted skbufs or else netpoll will
2589          * run out of skbs and will fail and eventually netpoll application such
2590          * as netdump will fail.
2591          */
2592         for (i = 0; i < config->tx_fifo_num; i++)
2593                 tx_intr_handler(&mac_control->fifos[i]);
2594
2595         /* check for received packet and indicate up to network */
2596         for (i = 0; i < config->rx_ring_num; i++)
2597                 rx_intr_handler(&mac_control->rings[i]);
2598
2599         for (i = 0; i < config->rx_ring_num; i++) {
2600                 if (fill_rx_buffers(nic, i) == -ENOMEM) {
2601                         DBG_PRINT(ERR_DBG, "%s:Out of memory", dev->name);
2602                         DBG_PRINT(ERR_DBG, " in Rx Netpoll!!\n");
2603                         break;
2604                 }
2605         }
2606         atomic_dec(&nic->isr_cnt);
2607         enable_irq(dev->irq);
2608         return;
2609 }
2610 #endif
2611
2612 /**
2613  *  rx_intr_handler - Rx interrupt handler
2614  *  @nic: device private variable.
2615  *  Description:
2616  *  If the interrupt is because of a received frame or if the
2617  *  receive ring contains fresh as yet un-processed frames,this function is
2618  *  called. It picks out the RxD at which place the last Rx processing had
2619  *  stopped and sends the skb to the OSM's Rx handler and then increments
2620  *  the offset.
2621  *  Return Value:
2622  *  NONE.
2623  */
2624 static void rx_intr_handler(struct ring_info *ring_data)
2625 {
2626         struct s2io_nic *nic = ring_data->nic;
2627         struct net_device *dev = (struct net_device *) nic->dev;
2628         int get_block, put_block, put_offset;
2629         struct rx_curr_get_info get_info, put_info;
2630         struct RxD_t *rxdp;
2631         struct sk_buff *skb;
2632         int pkt_cnt = 0;
2633         int i;
2634
2635         spin_lock(&nic->rx_lock);
2636         if (atomic_read(&nic->card_state) == CARD_DOWN) {
2637                 DBG_PRINT(INTR_DBG, "%s: %s going down for reset\n",
2638                           __FUNCTION__, dev->name);
2639                 spin_unlock(&nic->rx_lock);
2640                 return;
2641         }
2642
2643         get_info = ring_data->rx_curr_get_info;
2644         get_block = get_info.block_index;
2645         memcpy(&put_info, &ring_data->rx_curr_put_info, sizeof(put_info));
2646         put_block = put_info.block_index;
2647         rxdp = ring_data->rx_blocks[get_block].rxds[get_info.offset].virt_addr;
2648         if (!napi) {
2649                 spin_lock(&nic->put_lock);
2650                 put_offset = ring_data->put_pos;
2651                 spin_unlock(&nic->put_lock);
2652         } else
2653                 put_offset = ring_data->put_pos;
2654
2655         while (RXD_IS_UP2DT(rxdp)) {
2656                 /*
2657                  * If your are next to put index then it's
2658                  * FIFO full condition
2659                  */
2660                 if ((get_block == put_block) &&
2661                     (get_info.offset + 1) == put_info.offset) {
2662                         DBG_PRINT(INTR_DBG, "%s: Ring Full\n",dev->name);
2663                         break;
2664                 }
2665                 skb = (struct sk_buff *) ((unsigned long)rxdp->Host_Control);
2666                 if (skb == NULL) {
2667                         DBG_PRINT(ERR_DBG, "%s: The skb is ",
2668                                   dev->name);
2669                         DBG_PRINT(ERR_DBG, "Null in Rx Intr\n");
2670                         spin_unlock(&nic->rx_lock);
2671                         return;
2672                 }
2673                 if (nic->rxd_mode == RXD_MODE_1) {
2674                         pci_unmap_single(nic->pdev, (dma_addr_t)
2675                                  ((struct RxD1*)rxdp)->Buffer0_ptr,
2676                                  dev->mtu +
2677                                  HEADER_ETHERNET_II_802_3_SIZE +
2678                                  HEADER_802_2_SIZE +
2679                                  HEADER_SNAP_SIZE,
2680                                  PCI_DMA_FROMDEVICE);
2681                 } else if (nic->rxd_mode == RXD_MODE_3B) {
2682                         pci_dma_sync_single_for_cpu(nic->pdev, (dma_addr_t)
2683                                  ((struct RxD3*)rxdp)->Buffer0_ptr,
2684                                  BUF0_LEN, PCI_DMA_FROMDEVICE);
2685                         pci_unmap_single(nic->pdev, (dma_addr_t)
2686                                  ((struct RxD3*)rxdp)->Buffer2_ptr,
2687                                  dev->mtu + 4,
2688                                  PCI_DMA_FROMDEVICE);
2689                 } else {
2690                         pci_dma_sync_single_for_cpu(nic->pdev, (dma_addr_t)
2691                                          ((struct RxD3*)rxdp)->Buffer0_ptr, BUF0_LEN,
2692                                          PCI_DMA_FROMDEVICE);
2693                         pci_unmap_single(nic->pdev, (dma_addr_t)
2694                                          ((struct RxD3*)rxdp)->Buffer1_ptr,
2695                                          l3l4hdr_size + 4,
2696                                          PCI_DMA_FROMDEVICE);
2697                         pci_unmap_single(nic->pdev, (dma_addr_t)
2698                                          ((struct RxD3*)rxdp)->Buffer2_ptr,
2699                                          dev->mtu, PCI_DMA_FROMDEVICE);
2700                 }
2701                 prefetch(skb->data);
2702                 rx_osm_handler(ring_data, rxdp);
2703                 get_info.offset++;
2704                 ring_data->rx_curr_get_info.offset = get_info.offset;
2705                 rxdp = ring_data->rx_blocks[get_block].
2706                                 rxds[get_info.offset].virt_addr;
2707                 if (get_info.offset == rxd_count[nic->rxd_mode]) {
2708                         get_info.offset = 0;
2709                         ring_data->rx_curr_get_info.offset = get_info.offset;
2710                         get_block++;
2711                         if (get_block == ring_data->block_count)
2712                                 get_block = 0;
2713                         ring_data->rx_curr_get_info.block_index = get_block;
2714                         rxdp = ring_data->rx_blocks[get_block].block_virt_addr;
2715                 }
2716
2717                 nic->pkts_to_process -= 1;
2718                 if ((napi) && (!nic->pkts_to_process))
2719                         break;
2720                 pkt_cnt++;
2721                 if ((indicate_max_pkts) && (pkt_cnt > indicate_max_pkts))
2722                         break;
2723         }
2724         if (nic->lro) {
2725                 /* Clear all LRO sessions before exiting */
2726                 for (i=0; i<MAX_LRO_SESSIONS; i++) {
2727                         struct lro *lro = &nic->lro0_n[i];
2728                         if (lro->in_use) {
2729                                 update_L3L4_header(nic, lro);
2730                                 queue_rx_frame(lro->parent);
2731                                 clear_lro_session(lro);
2732                         }
2733                 }
2734         }
2735
2736         spin_unlock(&nic->rx_lock);
2737 }
2738
2739 /**
2740  *  tx_intr_handler - Transmit interrupt handler
2741  *  @nic : device private variable
2742  *  Description:
2743  *  If an interrupt was raised to indicate DMA complete of the
2744  *  Tx packet, this function is called. It identifies the last TxD
2745  *  whose buffer was freed and frees all skbs whose data have already
2746  *  DMA'ed into the NICs internal memory.
2747  *  Return Value:
2748  *  NONE
2749  */
2750
2751 static void tx_intr_handler(struct fifo_info *fifo_data)
2752 {
2753         struct s2io_nic *nic = fifo_data->nic;
2754         struct net_device *dev = (struct net_device *) nic->dev;
2755         struct tx_curr_get_info get_info, put_info;
2756         struct sk_buff *skb;
2757         struct TxD *txdlp;
2758
2759         get_info = fifo_data->tx_curr_get_info;
2760         memcpy(&put_info, &fifo_data->tx_curr_put_info, sizeof(put_info));
2761         txdlp = (struct TxD *) fifo_data->list_info[get_info.offset].
2762             list_virt_addr;
2763         while ((!(txdlp->Control_1 & TXD_LIST_OWN_XENA)) &&
2764                (get_info.offset != put_info.offset) &&
2765                (txdlp->Host_Control)) {
2766                 /* Check for TxD errors */
2767                 if (txdlp->Control_1 & TXD_T_CODE) {
2768                         unsigned long long err;
2769                         err = txdlp->Control_1 & TXD_T_CODE;
2770                         if (err & 0x1) {
2771                                 nic->mac_control.stats_info->sw_stat.
2772                                                 parity_err_cnt++;
2773                         }
2774                         if ((err >> 48) == 0xA) {
2775                                 DBG_PRINT(TX_DBG, "TxD returned due \
2776                                                 to loss of link\n");
2777                         }
2778                         else {
2779                                 DBG_PRINT(ERR_DBG, "***TxD error %llx\n", err);
2780                         }
2781                 }
2782
2783                 skb = s2io_txdl_getskb(fifo_data, txdlp, get_info.offset);
2784                 if (skb == NULL) {
2785                         DBG_PRINT(ERR_DBG, "%s: Null skb ",
2786                         __FUNCTION__);
2787                         DBG_PRINT(ERR_DBG, "in Tx Free Intr\n");
2788                         return;
2789                 }
2790
2791                 /* Updating the statistics block */
2792                 nic->stats.tx_bytes += skb->len;
2793                 dev_kfree_skb_irq(skb);
2794
2795                 get_info.offset++;
2796                 if (get_info.offset == get_info.fifo_len + 1)
2797                         get_info.offset = 0;
2798                 txdlp = (struct TxD *) fifo_data->list_info
2799                     [get_info.offset].list_virt_addr;
2800                 fifo_data->tx_curr_get_info.offset =
2801                     get_info.offset;
2802         }
2803
2804         spin_lock(&nic->tx_lock);
2805         if (netif_queue_stopped(dev))
2806                 netif_wake_queue(dev);
2807         spin_unlock(&nic->tx_lock);
2808 }
2809
2810 /**
2811  *  s2io_mdio_write - Function to write in to MDIO registers
2812  *  @mmd_type : MMD type value (PMA/PMD/WIS/PCS/PHYXS)
2813  *  @addr     : address value
2814  *  @value    : data value
2815  *  @dev      : pointer to net_device structure
2816  *  Description:
2817  *  This function is used to write values to the MDIO registers
2818  *  NONE
2819  */
2820 static void s2io_mdio_write(u32 mmd_type, u64 addr, u16 value, struct net_device *dev)
2821 {
2822         u64 val64 = 0x0;
2823         struct s2io_nic *sp = dev->priv;
2824         struct XENA_dev_config __iomem *bar0 = sp->bar0;
2825
2826         //address transaction
2827         val64 = val64 | MDIO_MMD_INDX_ADDR(addr)
2828                         | MDIO_MMD_DEV_ADDR(mmd_type)
2829                         | MDIO_MMS_PRT_ADDR(0x0);
2830         writeq(val64, &bar0->mdio_control);
2831         val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
2832         writeq(val64, &bar0->mdio_control);
2833         udelay(100);
2834
2835         //Data transaction
2836         val64 = 0x0;
2837         val64 = val64 | MDIO_MMD_INDX_ADDR(addr)
2838                         | MDIO_MMD_DEV_ADDR(mmd_type)
2839                         | MDIO_MMS_PRT_ADDR(0x0)
2840                         | MDIO_MDIO_DATA(value)
2841                         | MDIO_OP(MDIO_OP_WRITE_TRANS);
2842         writeq(val64, &bar0->mdio_control);
2843         val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
2844         writeq(val64, &bar0->mdio_control);
2845         udelay(100);
2846
2847         val64 = 0x0;
2848         val64 = val64 | MDIO_MMD_INDX_ADDR(addr)
2849         | MDIO_MMD_DEV_ADDR(mmd_type)
2850         | MDIO_MMS_PRT_ADDR(0x0)
2851         | MDIO_OP(MDIO_OP_READ_TRANS);
2852         writeq(val64, &bar0->mdio_control);
2853         val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
2854         writeq(val64, &bar0->mdio_control);
2855         udelay(100);
2856
2857 }
2858
2859 /**
2860  *  s2io_mdio_read - Function to write in to MDIO registers
2861  *  @mmd_type : MMD type value (PMA/PMD/WIS/PCS/PHYXS)
2862  *  @addr     : address value
2863  *  @dev      : pointer to net_device structure
2864  *  Description:
2865  *  This function is used to read values to the MDIO registers
2866  *  NONE
2867  */
2868 static u64 s2io_mdio_read(u32 mmd_type, u64 addr, struct net_device *dev)
2869 {
2870         u64 val64 = 0x0;
2871         u64 rval64 = 0x0;
2872         struct s2io_nic *sp = dev->priv;
2873         struct XENA_dev_config __iomem *bar0 = sp->bar0;
2874
2875         /* address transaction */
2876         val64 = val64 | MDIO_MMD_INDX_ADDR(addr)
2877                         | MDIO_MMD_DEV_ADDR(mmd_type)
2878                         | MDIO_MMS_PRT_ADDR(0x0);
2879         writeq(val64, &bar0->mdio_control);
2880         val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
2881         writeq(val64, &bar0->mdio_control);
2882         udelay(100);
2883
2884         /* Data transaction */
2885         val64 = 0x0;
2886         val64 = val64 | MDIO_MMD_INDX_ADDR(addr)
2887                         | MDIO_MMD_DEV_ADDR(mmd_type)
2888                         | MDIO_MMS_PRT_ADDR(0x0)
2889                         | MDIO_OP(MDIO_OP_READ_TRANS);
2890         writeq(val64, &bar0->mdio_control);
2891         val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
2892         writeq(val64, &bar0->mdio_control);
2893         udelay(100);
2894
2895         /* Read the value from regs */
2896         rval64 = readq(&bar0->mdio_control);
2897         rval64 = rval64 & 0xFFFF0000;
2898         rval64 = rval64 >> 16;
2899         return rval64;
2900 }
2901 /**
2902  *  s2io_chk_xpak_counter - Function to check the status of the xpak counters
2903  *  @counter      : couter value to be updated
2904  *  @flag         : flag to indicate the status
2905  *  @type         : counter type
2906  *  Description:
2907  *  This function is to check the status of the xpak counters value
2908  *  NONE
2909  */
2910
2911 static void s2io_chk_xpak_counter(u64 *counter, u64 * regs_stat, u32 index, u16 flag, u16 type)
2912 {
2913         u64 mask = 0x3;
2914         u64 val64;
2915         int i;
2916         for(i = 0; i <index; i++)
2917                 mask = mask << 0x2;
2918
2919         if(flag > 0)
2920         {
2921                 *counter = *counter + 1;
2922                 val64 = *regs_stat & mask;
2923                 val64 = val64 >> (index * 0x2);
2924                 val64 = val64 + 1;
2925                 if(val64 == 3)
2926                 {
2927                         switch(type)
2928                         {
2929                         case 1:
2930                                 DBG_PRINT(ERR_DBG, "Take Xframe NIC out of "
2931                                           "service. Excessive temperatures may "
2932                                           "result in premature transceiver "
2933                                           "failure \n");
2934                         break;
2935                         case 2:
2936                                 DBG_PRINT(ERR_DBG, "Take Xframe NIC out of "
2937                                           "service Excessive bias currents may "
2938                                           "indicate imminent laser diode "
2939                                           "failure \n");
2940                         break;
2941                         case 3:
2942                                 DBG_PRINT(ERR_DBG, "Take Xframe NIC out of "
2943                                           "service Excessive laser output "
2944                                           "power may saturate far-end "
2945                                           "receiver\n");
2946                         break;
2947                         default:
2948                                 DBG_PRINT(ERR_DBG, "Incorrect XPAK Alarm "
2949                                           "type \n");
2950                         }
2951                         val64 = 0x0;
2952                 }
2953                 val64 = val64 << (index * 0x2);
2954                 *regs_stat = (*regs_stat & (~mask)) | (val64);
2955
2956         } else {
2957                 *regs_stat = *regs_stat & (~mask);
2958         }
2959 }
2960
2961 /**
2962  *  s2io_updt_xpak_counter - Function to update the xpak counters
2963  *  @dev         : pointer to net_device struct
2964  *  Description:
2965  *  This function is to upate the status of the xpak counters value
2966  *  NONE
2967  */
2968 static void s2io_updt_xpak_counter(struct net_device *dev)
2969 {
2970         u16 flag  = 0x0;
2971         u16 type  = 0x0;
2972         u16 val16 = 0x0;
2973         u64 val64 = 0x0;
2974         u64 addr  = 0x0;
2975
2976         struct s2io_nic *sp = dev->priv;
2977         struct stat_block *stat_info = sp->mac_control.stats_info;
2978
2979         /* Check the communication with the MDIO slave */
2980         addr = 0x0000;
2981         val64 = 0x0;
2982         val64 = s2io_mdio_read(MDIO_MMD_PMA_DEV_ADDR, addr, dev);
2983         if((val64 == 0xFFFF) || (val64 == 0x0000))
2984         {
2985                 DBG_PRINT(ERR_DBG, "ERR: MDIO slave access failed - "
2986                           "Returned %llx\n", (unsigned long long)val64);
2987                 return;
2988         }
2989
2990         /* Check for the expecte value of 2040 at PMA address 0x0000 */
2991         if(val64 != 0x2040)
2992         {
2993                 DBG_PRINT(ERR_DBG, "Incorrect value at PMA address 0x0000 - ");
2994                 DBG_PRINT(ERR_DBG, "Returned: %llx- Expected: 0x2040\n",
2995                           (unsigned long long)val64);
2996                 return;
2997         }
2998
2999         /* Loading the DOM register to MDIO register */
3000         addr = 0xA100;
3001         s2io_mdio_write(MDIO_MMD_PMA_DEV_ADDR, addr, val16, dev);
3002         val64 = s2io_mdio_read(MDIO_MMD_PMA_DEV_ADDR, addr, dev);
3003
3004         /* Reading the Alarm flags */
3005         addr = 0xA070;
3006         val64 = 0x0;
3007         val64 = s2io_mdio_read(MDIO_MMD_PMA_DEV_ADDR, addr, dev);
3008
3009         flag = CHECKBIT(val64, 0x7);
3010         type = 1;
3011         s2io_chk_xpak_counter(&stat_info->xpak_stat.alarm_transceiver_temp_high,
3012                                 &stat_info->xpak_stat.xpak_regs_stat,
3013                                 0x0, flag, type);
3014
3015         if(CHECKBIT(val64, 0x6))
3016                 stat_info->xpak_stat.alarm_transceiver_temp_low++;
3017
3018         flag = CHECKBIT(val64, 0x3);
3019         type = 2;
3020         s2io_chk_xpak_counter(&stat_info->xpak_stat.alarm_laser_bias_current_high,
3021                                 &stat_info->xpak_stat.xpak_regs_stat,
3022                                 0x2, flag, type);
3023
3024         if(CHECKBIT(val64, 0x2))
3025                 stat_info->xpak_stat.alarm_laser_bias_current_low++;
3026
3027         flag = CHECKBIT(val64, 0x1);
3028         type = 3;
3029         s2io_chk_xpak_counter(&stat_info->xpak_stat.alarm_laser_output_power_high,
3030                                 &stat_info->xpak_stat.xpak_regs_stat,
3031                                 0x4, flag, type);
3032
3033         if(CHECKBIT(val64, 0x0))
3034                 stat_info->xpak_stat.alarm_laser_output_power_low++;
3035
3036         /* Reading the Warning flags */
3037         addr = 0xA074;
3038         val64 = 0x0;
3039         val64 = s2io_mdio_read(MDIO_MMD_PMA_DEV_ADDR, addr, dev);
3040
3041         if(CHECKBIT(val64, 0x7))
3042                 stat_info->xpak_stat.warn_transceiver_temp_high++;
3043
3044         if(CHECKBIT(val64, 0x6))
3045                 stat_info->xpak_stat.warn_transceiver_temp_low++;
3046
3047         if(CHECKBIT(val64, 0x3))
3048                 stat_info->xpak_stat.warn_laser_bias_current_high++;
3049
3050         if(CHECKBIT(val64, 0x2))
3051                 stat_info->xpak_stat.warn_laser_bias_current_low++;
3052
3053         if(CHECKBIT(val64, 0x1))
3054                 stat_info->xpak_stat.warn_laser_output_power_high++;
3055
3056         if(CHECKBIT(val64, 0x0))
3057                 stat_info->xpak_stat.warn_laser_output_power_low++;
3058 }
3059
3060 /**
3061  *  alarm_intr_handler - Alarm Interrrupt handler
3062  *  @nic: device private variable
3063  *  Description: If the interrupt was neither because of Rx packet or Tx
3064  *  complete, this function is called. If the interrupt was to indicate
3065  *  a loss of link, the OSM link status handler is invoked for any other
3066  *  alarm interrupt the block that raised the interrupt is displayed
3067  *  and a H/W reset is issued.
3068  *  Return Value:
3069  *  NONE
3070 */
3071
3072 static void alarm_intr_handler(struct s2io_nic *nic)
3073 {
3074         struct net_device *dev = (struct net_device *) nic->dev;
3075         struct XENA_dev_config __iomem *bar0 = nic->bar0;
3076         register u64 val64 = 0, err_reg = 0;
3077         u64 cnt;
3078         int i;
3079         if (atomic_read(&nic->card_state) == CARD_DOWN)
3080                 return;
3081         nic->mac_control.stats_info->sw_stat.ring_full_cnt = 0;
3082         /* Handling the XPAK counters update */
3083         if(nic->mac_control.stats_info->xpak_stat.xpak_timer_count < 72000) {
3084                 /* waiting for an hour */
3085                 nic->mac_control.stats_info->xpak_stat.xpak_timer_count++;
3086         } else {
3087                 s2io_updt_xpak_counter(dev);
3088                 /* reset the count to zero */
3089                 nic->mac_control.stats_info->xpak_stat.xpak_timer_count = 0;
3090         }
3091
3092         /* Handling link status change error Intr */
3093         if (s2io_link_fault_indication(nic) == MAC_RMAC_ERR_TIMER) {
3094                 err_reg = readq(&bar0->mac_rmac_err_reg);
3095                 writeq(err_reg, &bar0->mac_rmac_err_reg);
3096                 if (err_reg & RMAC_LINK_STATE_CHANGE_INT) {
3097                         schedule_work(&nic->set_link_task);
3098                 }
3099         }
3100
3101         /* Handling Ecc errors */
3102         val64 = readq(&bar0->mc_err_reg);
3103         writeq(val64, &bar0->mc_err_reg);
3104         if (val64 & (MC_ERR_REG_ECC_ALL_SNG | MC_ERR_REG_ECC_ALL_DBL)) {
3105                 if (val64 & MC_ERR_REG_ECC_ALL_DBL) {
3106                         nic->mac_control.stats_info->sw_stat.
3107                                 double_ecc_errs++;
3108                         DBG_PRINT(INIT_DBG, "%s: Device indicates ",
3109                                   dev->name);
3110                         DBG_PRINT(INIT_DBG, "double ECC error!!\n");
3111                         if (nic->device_type != XFRAME_II_DEVICE) {
3112                                 /* Reset XframeI only if critical error */
3113                                 if (val64 & (MC_ERR_REG_MIRI_ECC_DB_ERR_0 |
3114                                              MC_ERR_REG_MIRI_ECC_DB_ERR_1)) {
3115                                         netif_stop_queue(dev);
3116                                         schedule_work(&nic->rst_timer_task);
3117                                         nic->mac_control.stats_info->sw_stat.
3118                                                         soft_reset_cnt++;
3119                                 }
3120                         }
3121                 } else {
3122                         nic->mac_control.stats_info->sw_stat.
3123                                 single_ecc_errs++;
3124                 }
3125         }
3126
3127         /* In case of a serious error, the device will be Reset. */
3128         val64 = readq(&bar0->serr_source);
3129         if (val64 & SERR_SOURCE_ANY) {
3130                 nic->mac_control.stats_info->sw_stat.serious_err_cnt++;
3131                 DBG_PRINT(ERR_DBG, "%s: Device indicates ", dev->name);
3132                 DBG_PRINT(ERR_DBG, "serious error %llx!!\n",
3133                           (unsigned long long)val64);
3134                 netif_stop_queue(dev);
3135                 schedule_work(&nic->rst_timer_task);
3136                 nic->mac_control.stats_info->sw_stat.soft_reset_cnt++;
3137         }
3138
3139         /*
3140          * Also as mentioned in the latest Errata sheets if the PCC_FB_ECC
3141          * Error occurs, the adapter will be recycled by disabling the
3142          * adapter enable bit and enabling it again after the device
3143          * becomes Quiescent.
3144          */
3145         val64 = readq(&bar0->pcc_err_reg);
3146         writeq(val64, &bar0->pcc_err_reg);
3147         if (val64 & PCC_FB_ECC_DB_ERR) {
3148                 u64 ac = readq(&bar0->adapter_control);
3149                 ac &= ~(ADAPTER_CNTL_EN);
3150                 writeq(ac, &bar0->adapter_control);
3151                 ac = readq(&bar0->adapter_control);
3152                 schedule_work(&nic->set_link_task);
3153         }
3154         /* Check for data parity error */
3155         val64 = readq(&bar0->pic_int_status);
3156         if (val64 & PIC_INT_GPIO) {
3157                 val64 = readq(&bar0->gpio_int_reg);
3158                 if (val64 & GPIO_INT_REG_DP_ERR_INT) {
3159                         nic->mac_control.stats_info->sw_stat.parity_err_cnt++;
3160                         schedule_work(&nic->rst_timer_task);
3161                         nic->mac_control.stats_info->sw_stat.soft_reset_cnt++;
3162                 }
3163         }
3164
3165         /* Check for ring full counter */
3166         if (nic->device_type & XFRAME_II_DEVICE) {
3167                 val64 = readq(&bar0->ring_bump_counter1);
3168                 for (i=0; i<4; i++) {
3169                         cnt = ( val64 & vBIT(0xFFFF,(i*16),16));
3170                         cnt >>= 64 - ((i+1)*16);
3171                         nic->mac_control.stats_info->sw_stat.ring_full_cnt
3172                                 += cnt;
3173                 }
3174
3175                 val64 = readq(&bar0->ring_bump_counter2);
3176                 for (i=0; i<4; i++) {
3177                         cnt = ( val64 & vBIT(0xFFFF,(i*16),16));
3178                         cnt >>= 64 - ((i+1)*16);
3179                         nic->mac_control.stats_info->sw_stat.ring_full_cnt
3180                                 += cnt;
3181                 }
3182         }
3183
3184         /* Other type of interrupts are not being handled now,  TODO */
3185 }
3186
3187 /**
3188  *  wait_for_cmd_complete - waits for a command to complete.
3189  *  @sp : private member of the device structure, which is a pointer to the
3190  *  s2io_nic structure.
3191  *  Description: Function that waits for a command to Write into RMAC
3192  *  ADDR DATA registers to be completed and returns either success or
3193  *  error depending on whether the command was complete or not.
3194  *  Return value:
3195  *   SUCCESS on success and FAILURE on failure.
3196  */
3197
3198 static int wait_for_cmd_complete(void __iomem *addr, u64 busy_bit)
3199 {
3200         int ret = FAILURE, cnt = 0;
3201         u64 val64;
3202
3203         while (TRUE) {
3204                 val64 = readq(addr);
3205                 if (!(val64 & busy_bit)) {
3206                         ret = SUCCESS;
3207                         break;
3208                 }
3209
3210                 if(in_interrupt())
3211                         mdelay(50);
3212                 else
3213                         msleep(50);
3214
3215                 if (cnt++ > 10)
3216                         break;
3217         }
3218         return ret;
3219 }
3220 /*
3221  * check_pci_device_id - Checks if the device id is supported
3222  * @id : device id
3223  * Description: Function to check if the pci device id is supported by driver.
3224  * Return value: Actual device id if supported else PCI_ANY_ID
3225  */
3226 static u16 check_pci_device_id(u16 id)
3227 {
3228         switch (id) {
3229         case PCI_DEVICE_ID_HERC_WIN:
3230         case PCI_DEVICE_ID_HERC_UNI:
3231                 return XFRAME_II_DEVICE;
3232         case PCI_DEVICE_ID_S2IO_UNI:
3233         case PCI_DEVICE_ID_S2IO_WIN:
3234                 return XFRAME_I_DEVICE;
3235         default:
3236                 return PCI_ANY_ID;
3237         }
3238 }
3239
3240 /**
3241  *  s2io_reset - Resets the card.
3242  *  @sp : private member of the device structure.
3243  *  Description: Function to Reset the card. This function then also
3244  *  restores the previously saved PCI configuration space registers as
3245  *  the card reset also resets the configuration space.
3246  *  Return value:
3247  *  void.
3248  */
3249
3250 static void s2io_reset(struct s2io_nic * sp)
3251 {
3252         struct XENA_dev_config __iomem *bar0 = sp->bar0;
3253         u64 val64;
3254         u16 subid, pci_cmd;
3255         int i;
3256         u16 val16;
3257         DBG_PRINT(INIT_DBG,"%s - Resetting XFrame card %s\n",
3258                         __FUNCTION__, sp->dev->name);
3259
3260         /* Back up  the PCI-X CMD reg, dont want to lose MMRBC, OST settings */
3261         pci_read_config_word(sp->pdev, PCIX_COMMAND_REGISTER, &(pci_cmd));
3262
3263         if (sp->device_type == XFRAME_II_DEVICE) {
3264                 int ret;
3265                 ret = pci_set_power_state(sp->pdev, 3);
3266                 if (!ret)
3267                         ret = pci_set_power_state(sp->pdev, 0);
3268                 else {
3269                         DBG_PRINT(ERR_DBG,"%s PME based SW_Reset failed!\n",
3270                                         __FUNCTION__);
3271                         goto old_way;
3272                 }
3273                 msleep(20);
3274                 goto new_way;
3275         }
3276 old_way:
3277         val64 = SW_RESET_ALL;
3278         writeq(val64, &bar0->sw_reset);
3279 new_way:
3280         if (strstr(sp->product_name, "CX4")) {
3281                 msleep(750);
3282         }
3283         msleep(250);
3284         for (i = 0; i < S2IO_MAX_PCI_CONFIG_SPACE_REINIT; i++) {
3285
3286                 /* Restore the PCI state saved during initialization. */
3287                 pci_restore_state(sp->pdev);
3288                 pci_read_config_word(sp->pdev, 0x2, &val16);
3289                 if (check_pci_device_id(val16) != (u16)PCI_ANY_ID)
3290                         break;
3291                 msleep(200);
3292         }
3293
3294         if (check_pci_device_id(val16) == (u16)PCI_ANY_ID) {
3295                 DBG_PRINT(ERR_DBG,"%s SW_Reset failed!\n", __FUNCTION__);
3296         }
3297
3298         pci_write_config_word(sp->pdev, PCIX_COMMAND_REGISTER, pci_cmd);
3299
3300         s2io_init_pci(sp);
3301
3302         /* Set swapper to enable I/O register access */
3303         s2io_set_swapper(sp);
3304
3305         /* Restore the MSIX table entries from local variables */
3306         restore_xmsi_data(sp);
3307
3308         /* Clear certain PCI/PCI-X fields after reset */
3309         if (sp->device_type == XFRAME_II_DEVICE) {
3310                 /* Clear "detected parity error" bit */
3311                 pci_write_config_word(sp->pdev, PCI_STATUS, 0x8000);
3312
3313                 /* Clearing PCIX Ecc status register */
3314                 pci_write_config_dword(sp->pdev, 0x68, 0x7C);
3315
3316                 /* Clearing PCI_STATUS error reflected here */
3317                 writeq(BIT(62), &bar0->txpic_int_reg);
3318         }
3319
3320         /* Reset device statistics maintained by OS */
3321         memset(&sp->stats, 0, sizeof (struct net_device_stats));
3322
3323         /* SXE-002: Configure link and activity LED to turn it off */
3324         subid = sp->pdev->subsystem_device;
3325         if (((subid & 0xFF) >= 0x07) &&
3326             (sp->device_type == XFRAME_I_DEVICE)) {
3327                 val64 = readq(&bar0->gpio_control);
3328                 val64 |= 0x0000800000000000ULL;
3329                 writeq(val64, &bar0->gpio_control);
3330                 val64 = 0x0411040400000000ULL;
3331                 writeq(val64, (void __iomem *)bar0 + 0x2700);
3332         }
3333
3334         /*
3335          * Clear spurious ECC interrupts that would have occured on
3336          * XFRAME II cards after reset.
3337          */
3338         if (sp->device_type == XFRAME_II_DEVICE) {
3339                 val64 = readq(&bar0->pcc_err_reg);
3340                 writeq(val64, &bar0->pcc_err_reg);
3341         }
3342
3343         sp->device_enabled_once = FALSE;
3344 }
3345
3346 /**
3347  *  s2io_set_swapper - to set the swapper controle on the card
3348  *  @sp : private member of the device structure,
3349  *  pointer to the s2io_nic structure.
3350  *  Description: Function to set the swapper control on the card
3351  *  correctly depending on the 'endianness' of the system.
3352  *  Return value:
3353  *  SUCCESS on success and FAILURE on failure.
3354  */
3355
3356 static int s2io_set_swapper(struct s2io_nic * sp)
3357 {
3358         struct net_device *dev = sp->dev;
3359         struct XENA_dev_config __iomem *bar0 = sp->bar0;
3360         u64 val64, valt, valr;
3361
3362         /*
3363          * Set proper endian settings and verify the same by reading
3364          * the PIF Feed-back register.
3365          */
3366
3367         val64 = readq(&bar0->pif_rd_swapper_fb);
3368         if (val64 != 0x0123456789ABCDEFULL) {
3369                 int i = 0;
3370                 u64 value[] = { 0xC30000C3C30000C3ULL,   /* FE=1, SE=1 */
3371                                 0x8100008181000081ULL,  /* FE=1, SE=0 */
3372                                 0x4200004242000042ULL,  /* FE=0, SE=1 */
3373                                 0};                     /* FE=0, SE=0 */
3374
3375                 while(i<4) {
3376                         writeq(value[i], &bar0->swapper_ctrl);
3377                         val64 = readq(&bar0->pif_rd_swapper_fb);
3378                         if (val64 == 0x0123456789ABCDEFULL)
3379                                 break;
3380                         i++;
3381                 }
3382                 if (i == 4) {
3383                         DBG_PRINT(ERR_DBG, "%s: Endian settings are wrong, ",
3384                                 dev->name);
3385                         DBG_PRINT(ERR_DBG, "feedback read %llx\n",
3386                                 (unsigned long long) val64);
3387                         return FAILURE;
3388                 }
3389                 valr = value[i];
3390         } else {
3391                 valr = readq(&bar0->swapper_ctrl);
3392         }
3393
3394         valt = 0x0123456789ABCDEFULL;
3395         writeq(valt, &bar0->xmsi_address);
3396         val64 = readq(&bar0->xmsi_address);
3397
3398         if(val64 != valt) {
3399                 int i = 0;
3400                 u64 value[] = { 0x00C3C30000C3C300ULL,  /* FE=1, SE=1 */
3401                                 0x0081810000818100ULL,  /* FE=1, SE=0 */
3402                                 0x0042420000424200ULL,  /* FE=0, SE=1 */
3403                                 0};                     /* FE=0, SE=0 */
3404
3405                 while(i<4) {
3406                         writeq((value[i] | valr), &bar0->swapper_ctrl);
3407                         writeq(valt, &bar0->xmsi_address);
3408                         val64 = readq(&bar0->xmsi_address);
3409                         if(val64 == valt)
3410                                 break;
3411                         i++;
3412                 }
3413                 if(i == 4) {
3414                         unsigned long long x = val64;
3415                         DBG_PRINT(ERR_DBG, "Write failed, Xmsi_addr ");
3416                         DBG_PRINT(ERR_DBG, "reads:0x%llx\n", x);
3417                         return FAILURE;
3418                 }
3419         }
3420         val64 = readq(&bar0->swapper_ctrl);
3421         val64 &= 0xFFFF000000000000ULL;
3422
3423 #ifdef  __BIG_ENDIAN
3424         /*
3425          * The device by default set to a big endian format, so a
3426          * big endian driver need not set anything.
3427          */
3428         val64 |= (SWAPPER_CTRL_TXP_FE |
3429                  SWAPPER_CTRL_TXP_SE |
3430                  SWAPPER_CTRL_TXD_R_FE |
3431                  SWAPPER_CTRL_TXD_W_FE |
3432                  SWAPPER_CTRL_TXF_R_FE |
3433                  SWAPPER_CTRL_RXD_R_FE |
3434                  SWAPPER_CTRL_RXD_W_FE |
3435                  SWAPPER_CTRL_RXF_W_FE |
3436                  SWAPPER_CTRL_XMSI_FE |
3437                  SWAPPER_CTRL_STATS_FE | SWAPPER_CTRL_STATS_SE);
3438         if (sp->intr_type == INTA)
3439                 val64 |= SWAPPER_CTRL_XMSI_SE;
3440         writeq(val64, &bar0->swapper_ctrl);
3441 #else
3442         /*
3443          * Initially we enable all bits to make it accessible by the
3444          * driver, then we selectively enable only those bits that
3445          * we want to set.
3446          */
3447         val64 |= (SWAPPER_CTRL_TXP_FE |
3448                  SWAPPER_CTRL_TXP_SE |
3449                  SWAPPER_CTRL_TXD_R_FE |
3450                  SWAPPER_CTRL_TXD_R_SE |
3451                  SWAPPER_CTRL_TXD_W_FE |
3452                  SWAPPER_CTRL_TXD_W_SE |
3453                  SWAPPER_CTRL_TXF_R_FE |
3454                  SWAPPER_CTRL_RXD_R_FE |
3455                  SWAPPER_CTRL_RXD_R_SE |
3456                  SWAPPER_CTRL_RXD_W_FE |
3457                  SWAPPER_CTRL_RXD_W_SE |
3458                  SWAPPER_CTRL_RXF_W_FE |
3459                  SWAPPER_CTRL_XMSI_FE |
3460                  SWAPPER_CTRL_STATS_FE | SWAPPER_CTRL_STATS_SE);
3461         if (sp->intr_type == INTA)
3462                 val64 |= SWAPPER_CTRL_XMSI_SE;
3463         writeq(val64, &bar0->swapper_ctrl);
3464 #endif
3465         val64 = readq(&bar0->swapper_ctrl);
3466
3467         /*
3468          * Verifying if endian settings are accurate by reading a
3469          * feedback register.
3470          */
3471         val64 = readq(&bar0->pif_rd_swapper_fb);
3472         if (val64 != 0x0123456789ABCDEFULL) {
3473                 /* Endian settings are incorrect, calls for another dekko. */
3474                 DBG_PRINT(ERR_DBG, "%s: Endian settings are wrong, ",
3475                           dev->name);
3476                 DBG_PRINT(ERR_DBG, "feedback read %llx\n",
3477                           (unsigned long long) val64);
3478                 return FAILURE;
3479         }
3480
3481         return SUCCESS;
3482 }
3483
3484 static int wait_for_msix_trans(struct s2io_nic *nic, int i)
3485 {
3486         struct XENA_dev_config __iomem *bar0 = nic->bar0;
3487         u64 val64;
3488         int ret = 0, cnt = 0;
3489
3490         do {
3491                 val64 = readq(&bar0->xmsi_access);
3492                 if (!(val64 & BIT(15)))
3493                         break;
3494                 mdelay(1);
3495                 cnt++;
3496         } while(cnt < 5);
3497         if (cnt == 5) {
3498                 DBG_PRINT(ERR_DBG, "XMSI # %d Access failed\n", i);
3499                 ret = 1;
3500         }
3501
3502         return ret;
3503 }
3504
3505 static void restore_xmsi_data(struct s2io_nic *nic)
3506 {
3507         struct XENA_dev_config __iomem *bar0 = nic->bar0;
3508         u64 val64;
3509         int i;
3510
3511         for (i=0; i < MAX_REQUESTED_MSI_X; i++) {
3512                 writeq(nic->msix_info[i].addr, &bar0->xmsi_address);
3513                 writeq(nic->msix_info[i].data, &bar0->xmsi_data);
3514                 val64 = (BIT(7) | BIT(15) | vBIT(i, 26, 6));
3515                 writeq(val64, &bar0->xmsi_access);
3516                 if (wait_for_msix_trans(nic, i)) {
3517                         DBG_PRINT(ERR_DBG, "failed in %s\n", __FUNCTION__);
3518                         continue;
3519                 }
3520         }
3521 }
3522
3523 static void store_xmsi_data(struct s2io_nic *nic)
3524 {
3525         struct XENA_dev_config __iomem *bar0 = nic->bar0;
3526         u64 val64, addr, data;
3527         int i;
3528
3529         /* Store and display */
3530         for (i=0; i < MAX_REQUESTED_MSI_X; i++) {
3531                 val64 = (BIT(15) | vBIT(i, 26, 6));
3532                 writeq(val64, &bar0->xmsi_access);
3533                 if (wait_for_msix_trans(nic, i)) {
3534                         DBG_PRINT(ERR_DBG, "failed in %s\n", __FUNCTION__);
3535                         continue;
3536                 }
3537                 addr = readq(&bar0->xmsi_address);
3538                 data = readq(&bar0->xmsi_data);
3539                 if (addr && data) {
3540                         nic->msix_info[i].addr = addr;
3541                         nic->msix_info[i].data = data;
3542                 }
3543         }
3544 }
3545
3546 int s2io_enable_msi(struct s2io_nic *nic)
3547 {
3548         struct XENA_dev_config __iomem *bar0 = nic->bar0;
3549         u16 msi_ctrl, msg_val;
3550         struct config_param *config = &nic->config;
3551         struct net_device *dev = nic->dev;
3552         u64 val64, tx_mat, rx_mat;
3553         int i, err;
3554
3555         val64 = readq(&bar0->pic_control);
3556         val64 &= ~BIT(1);
3557         writeq(val64, &bar0->pic_control);
3558
3559         err = pci_enable_msi(nic->pdev);
3560         if (err) {
3561                 DBG_PRINT(ERR_DBG, "%s: enabling MSI failed\n",
3562                           nic->dev->name);
3563                 return err;
3564         }
3565
3566         /*
3567          * Enable MSI and use MSI-1 in stead of the standard MSI-0
3568          * for interrupt handling.
3569          */
3570         pci_read_config_word(nic->pdev, 0x4c, &msg_val);
3571         msg_val ^= 0x1;
3572         pci_write_config_word(nic->pdev, 0x4c, msg_val);
3573         pci_read_config_word(nic->pdev, 0x4c, &msg_val);
3574
3575         pci_read_config_word(nic->pdev, 0x42, &msi_ctrl);
3576         msi_ctrl |= 0x10;
3577         pci_write_config_word(nic->pdev, 0x42, msi_ctrl);
3578
3579         /* program MSI-1 into all usable Tx_Mat and Rx_Mat fields */
3580         tx_mat = readq(&bar0->tx_mat0_n[0]);
3581         for (i=0; i<config->tx_fifo_num; i++) {
3582                 tx_mat |= TX_MAT_SET(i, 1);
3583         }
3584         writeq(tx_mat, &bar0->tx_mat0_n[0]);
3585
3586         rx_mat = readq(&bar0->rx_mat);
3587         for (i=0; i<config->rx_ring_num; i++) {
3588                 rx_mat |= RX_MAT_SET(i, 1);
3589         }
3590         writeq(rx_mat, &bar0->rx_mat);
3591
3592         dev->irq = nic->pdev->irq;
3593         return 0;
3594 }
3595
3596 static int s2io_enable_msi_x(struct s2io_nic *nic)
3597 {
3598         struct XENA_dev_config __iomem *bar0 = nic->bar0;
3599         u64 tx_mat, rx_mat;
3600         u16 msi_control; /* Temp variable */
3601         int ret, i, j, msix_indx = 1;
3602
3603         nic->entries = kmalloc(MAX_REQUESTED_MSI_X * sizeof(struct msix_entry),
3604                                GFP_KERNEL);
3605         if (nic->entries == NULL) {
3606                 DBG_PRINT(ERR_DBG, "%s: Memory allocation failed\n", __FUNCTION__);
3607                 return -ENOMEM;
3608         }
3609         memset(nic->entries, 0, MAX_REQUESTED_MSI_X * sizeof(struct msix_entry));
3610
3611         nic->s2io_entries =
3612                 kmalloc(MAX_REQUESTED_MSI_X * sizeof(struct s2io_msix_entry),
3613                                    GFP_KERNEL);
3614         if (nic->s2io_entries == NULL) {
3615                 DBG_PRINT(ERR_DBG, "%s: Memory allocation failed\n", __FUNCTION__);
3616                 kfree(nic->entries);
3617                 return -ENOMEM;
3618         }
3619         memset(nic->s2io_entries, 0,
3620                MAX_REQUESTED_MSI_X * sizeof(struct s2io_msix_entry));
3621
3622         for (i=0; i< MAX_REQUESTED_MSI_X; i++) {
3623                 nic->entries[i].entry = i;
3624                 nic->s2io_entries[i].entry = i;
3625                 nic->s2io_entries[i].arg = NULL;
3626                 nic->s2io_entries[i].in_use = 0;
3627         }
3628
3629         tx_mat = readq(&bar0->tx_mat0_n[0]);
3630         for (i=0; i<nic->config.tx_fifo_num; i++, msix_indx++) {
3631                 tx_mat |= TX_MAT_SET(i, msix_indx);
3632                 nic->s2io_entries[msix_indx].arg = &nic->mac_control.fifos[i];
3633                 nic->s2io_entries[msix_indx].type = MSIX_FIFO_TYPE;
3634                 nic->s2io_entries[msix_indx].in_use = MSIX_FLG;
3635         }
3636         writeq(tx_mat, &bar0->tx_mat0_n[0]);
3637
3638         if (!nic->config.bimodal) {
3639                 rx_mat = readq(&bar0->rx_mat);
3640                 for (j=0; j<nic->config.rx_ring_num; j++, msix_indx++) {
3641                         rx_mat |= RX_MAT_SET(j, msix_indx);
3642                         nic->s2io_entries[msix_indx].arg = &nic->mac_control.rings[j];
3643                         nic->s2io_entries[msix_indx].type = MSIX_RING_TYPE;
3644                         nic->s2io_entries[msix_indx].in_use = MSIX_FLG;
3645                 }
3646                 writeq(rx_mat, &bar0->rx_mat);
3647         } else {
3648                 tx_mat = readq(&bar0->tx_mat0_n[7]);
3649                 for (j=0; j<nic->config.rx_ring_num; j++, msix_indx++) {
3650                         tx_mat |= TX_MAT_SET(i, msix_indx);
3651                         nic->s2io_entries[msix_indx].arg = &nic->mac_control.rings[j];
3652                         nic->s2io_entries[msix_indx].type = MSIX_RING_TYPE;
3653                         nic->s2io_entries[msix_indx].in_use = MSIX_FLG;
3654                 }
3655                 writeq(tx_mat, &bar0->tx_mat0_n[7]);
3656         }
3657
3658         nic->avail_msix_vectors = 0;
3659         ret = pci_enable_msix(nic->pdev, nic->entries, MAX_REQUESTED_MSI_X);
3660         /* We fail init if error or we get less vectors than min required */
3661         if (ret >= (nic->config.tx_fifo_num + nic->config.rx_ring_num + 1)) {
3662                 nic->avail_msix_vectors = ret;
3663                 ret = pci_enable_msix(nic->pdev, nic->entries, ret);
3664         }
3665         if (ret) {
3666                 DBG_PRINT(ERR_DBG, "%s: Enabling MSIX failed\n", nic->dev->name);
3667                 kfree(nic->entries);
3668                 kfree(nic->s2io_entries);
3669                 nic->entries = NULL;
3670                 nic->s2io_entries = NULL;
3671                 nic->avail_msix_vectors = 0;
3672                 return -ENOMEM;
3673         }
3674         if (!nic->avail_msix_vectors)
3675                 nic->avail_msix_vectors = MAX_REQUESTED_MSI_X;
3676
3677         /*
3678          * To enable MSI-X, MSI also needs to be enabled, due to a bug
3679          * in the herc NIC. (Temp change, needs to be removed later)
3680          */
3681         pci_read_config_word(nic->pdev, 0x42, &msi_control);
3682         msi_control |= 0x1; /* Enable MSI */
3683         pci_write_config_word(nic->pdev, 0x42, msi_control);
3684
3685         return 0;
3686 }
3687
3688 /* ********************************************************* *
3689  * Functions defined below concern the OS part of the driver *
3690  * ********************************************************* */
3691
3692 /**
3693  *  s2io_open - open entry point of the driver
3694  *  @dev : pointer to the device structure.
3695  *  Description:
3696  *  This function is the open entry point of the driver. It mainly calls a
3697  *  function to allocate Rx buffers and inserts them into the buffer
3698  *  descriptors and then enables the Rx part of the NIC.
3699  *  Return value:
3700  *  0 on success and an appropriate (-)ve integer as defined in errno.h
3701  *   file on failure.
3702  */
3703
3704 static int s2io_open(struct net_device *dev)
3705 {
3706         struct s2io_nic *sp = dev->priv;
3707         int err = 0;
3708
3709         /*
3710          * Make sure you have link off by default every time
3711          * Nic is initialized
3712          */
3713         netif_carrier_off(dev);
3714         sp->last_link_state = 0;
3715
3716         /* Initialize H/W and enable interrupts */
3717         err = s2io_card_up(sp);
3718         if (err) {
3719                 DBG_PRINT(ERR_DBG, "%s: H/W initialization failed\n",
3720                           dev->name);
3721                 goto hw_init_failed;
3722         }
3723
3724         if (s2io_set_mac_addr(dev, dev->dev_addr) == FAILURE) {
3725                 DBG_PRINT(ERR_DBG, "Set Mac Address Failed\n");
3726                 s2io_card_down(sp);
3727                 err = -ENODEV;
3728                 goto hw_init_failed;
3729         }
3730
3731         netif_start_queue(dev);
3732         return 0;
3733
3734 hw_init_failed:
3735         if (sp->intr_type == MSI_X) {
3736                 if (sp->entries)
3737                         kfree(sp->entries);
3738                 if (sp->s2io_entries)
3739                         kfree(sp->s2io_entries);
3740         }
3741         return err;
3742 }
3743
3744 /**
3745  *  s2io_close -close entry point of the driver
3746  *  @dev : device pointer.
3747  *  Description:
3748  *  This is the stop entry point of the driver. It needs to undo exactly
3749  *  whatever was done by the open entry point,thus it's usually referred to
3750  *  as the close function.Among other things this function mainly stops the
3751  *  Rx side of the NIC and frees all the Rx buffers in the Rx rings.
3752  *  Return value:
3753  *  0 on success and an appropriate (-)ve integer as defined in errno.h
3754  *  file on failure.
3755  */
3756
3757 static int s2io_close(struct net_device *dev)
3758 {
3759         struct s2io_nic *sp = dev->priv;
3760
3761         flush_scheduled_work();
3762         netif_stop_queue(dev);
3763         /* Reset card, kill tasklet and free Tx and Rx buffers. */
3764         s2io_card_down(sp);
3765
3766         sp->device_close_flag = TRUE;   /* Device is shut down. */
3767         return 0;
3768 }
3769
3770 /**
3771  *  s2io_xmit - Tx entry point of te driver
3772  *  @skb : the socket buffer containing the Tx data.
3773  *  @dev : device pointer.
3774  *  Description :
3775  *  This function is the Tx entry point of the driver. S2IO NIC supports
3776  *  certain protocol assist features on Tx side, namely  CSO, S/G, LSO.
3777  *  NOTE: when device cant queue the pkt,just the trans_start variable will
3778  *  not be upadted.
3779  *  Return value:
3780  *  0 on success & 1 on failure.
3781  */
3782
3783 static int s2io_xmit(struct sk_buff *skb, struct net_device *dev)
3784 {
3785         struct s2io_nic *sp = dev->priv;
3786         u16 frg_cnt, frg_len, i, queue, queue_len, put_off, get_off;
3787         register u64 val64;
3788         struct TxD *txdp;
3789         struct TxFIFO_element __iomem *tx_fifo;
3790         unsigned long flags;
3791         u16 vlan_tag = 0;
3792         int vlan_priority = 0;
3793         struct mac_info *mac_control;
3794         struct config_param *config;
3795         int offload_type;
3796
3797         mac_control = &sp->mac_control;
3798         config = &sp->config;
3799
3800         DBG_PRINT(TX_DBG, "%s: In Neterion Tx routine\n", dev->name);
3801         spin_lock_irqsave(&sp->tx_lock, flags);
3802         if (atomic_read(&sp->card_state) == CARD_DOWN) {
3803                 DBG_PRINT(TX_DBG, "%s: Card going down for reset\n",
3804                           dev->name);
3805                 spin_unlock_irqrestore(&sp->tx_lock, flags);
3806                 dev_kfree_skb(skb);
3807                 return 0;
3808         }
3809
3810         queue = 0;
3811
3812         /* Get Fifo number to Transmit based on vlan priority */
3813         if (sp->vlgrp && vlan_tx_tag_present(skb)) {
3814                 vlan_tag = vlan_tx_tag_get(skb);
3815                 vlan_priority = vlan_tag >> 13;
3816                 queue = config->fifo_mapping[vlan_priority];
3817         }
3818
3819         put_off = (u16) mac_control->fifos[queue].tx_curr_put_info.offset;
3820         get_off = (u16) mac_control->fifos[queue].tx_curr_get_info.offset;
3821         txdp = (struct TxD *) mac_control->fifos[queue].list_info[put_off].
3822                 list_virt_addr;
3823
3824         queue_len = mac_control->fifos[queue].tx_curr_put_info.fifo_len + 1;
3825         /* Avoid "put" pointer going beyond "get" pointer */
3826         if (txdp->Host_Control ||
3827                    ((put_off+1) == queue_len ? 0 : (put_off+1)) == get_off) {
3828                 DBG_PRINT(TX_DBG, "Error in xmit, No free TXDs.\n");
3829                 netif_stop_queue(dev);
3830                 dev_kfree_skb(skb);
3831                 spin_unlock_irqrestore(&sp->tx_lock, flags);
3832                 return 0;
3833         }
3834
3835         /* A buffer with no data will be dropped */
3836         if (!skb->len) {
3837                 DBG_PRINT(TX_DBG, "%s:Buffer has no data..\n", dev->name);
3838                 dev_kfree_skb(skb);
3839                 spin_unlock_irqrestore(&sp->tx_lock, flags);
3840                 return 0;
3841         }
3842
3843         offload_type = s2io_offload_type(skb);
3844         if (offload_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) {
3845                 txdp->Control_1 |= TXD_TCP_LSO_EN;
3846                 txdp->Control_1 |= TXD_TCP_LSO_MSS(s2io_tcp_mss(skb));
3847         }
3848         if (skb->ip_summed == CHECKSUM_PARTIAL) {
3849                 txdp->Control_2 |=
3850                     (TXD_TX_CKO_IPV4_EN | TXD_TX_CKO_TCP_EN |
3851                      TXD_TX_CKO_UDP_EN);
3852         }
3853         txdp->Control_1 |= TXD_GATHER_CODE_FIRST;
3854         txdp->Control_1 |= TXD_LIST_OWN_XENA;
3855         txdp->Control_2 |= config->tx_intr_type;
3856
3857         if (sp->vlgrp && vlan_tx_tag_present(skb)) {
3858                 txdp->Control_2 |= TXD_VLAN_ENABLE;
3859                 txdp->Control_2 |= TXD_VLAN_TAG(vlan_tag);
3860         }
3861
3862         frg_len = skb->len - skb->data_len;
3863         if (offload_type == SKB_GSO_UDP) {
3864                 int ufo_size;
3865
3866                 ufo_size = s2io_udp_mss(skb);
3867                 ufo_size &= ~7;
3868                 txdp->Control_1 |= TXD_UFO_EN;
3869                 txdp->Control_1 |= TXD_UFO_MSS(ufo_size);
3870                 txdp->Control_1 |= TXD_BUFFER0_SIZE(8);
3871 #ifdef __BIG_ENDIAN
3872                 sp->ufo_in_band_v[put_off] =
3873                                 (u64)skb_shinfo(skb)->ip6_frag_id;
3874 #else
3875                 sp->ufo_in_band_v[put_off] =
3876                                 (u64)skb_shinfo(skb)->ip6_frag_id << 32;
3877 #endif
3878                 txdp->Host_Control = (unsigned long)sp->ufo_in_band_v;
3879                 txdp->Buffer_Pointer = pci_map_single(sp->pdev,
3880                                         sp->ufo_in_band_v,
3881                                         sizeof(u64), PCI_DMA_TODEVICE);
3882                 txdp++;
3883         }
3884
3885         txdp->Buffer_Pointer = pci_map_single
3886             (sp->pdev, skb->data, frg_len, PCI_DMA_TODEVICE);
3887         txdp->Host_Control = (unsigned long) skb;
3888         txdp->Control_1 |= TXD_BUFFER0_SIZE(frg_len);
3889         if (offload_type == SKB_GSO_UDP)
3890                 txdp->Control_1 |= TXD_UFO_EN;
3891
3892         frg_cnt = skb_shinfo(skb)->nr_frags;
3893         /* For fragmented SKB. */
3894         for (i = 0; i < frg_cnt; i++) {
3895                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
3896                 /* A '0' length fragment will be ignored */
3897                 if (!frag->size)
3898                         continue;
3899                 txdp++;
3900                 txdp->Buffer_Pointer = (u64) pci_map_page
3901                     (sp->pdev, frag->page, frag->page_offset,
3902                      frag->size, PCI_DMA_TODEVICE);
3903                 txdp->Control_1 = TXD_BUFFER0_SIZE(frag->size);
3904                 if (offload_type == SKB_GSO_UDP)
3905                         txdp->Control_1 |= TXD_UFO_EN;
3906         }
3907         txdp->Control_1 |= TXD_GATHER_CODE_LAST;
3908
3909         if (offload_type == SKB_GSO_UDP)
3910                 frg_cnt++; /* as Txd0 was used for inband header */
3911
3912         tx_fifo = mac_control->tx_FIFO_start[queue];
3913         val64 = mac_control->fifos[queue].list_info[put_off].list_phy_addr;
3914         writeq(val64, &tx_fifo->TxDL_Pointer);
3915
3916         val64 = (TX_FIFO_LAST_TXD_NUM(frg_cnt) | TX_FIFO_FIRST_LIST |
3917                  TX_FIFO_LAST_LIST);
3918         if (offload_type)
3919                 val64 |= TX_FIFO_SPECIAL_FUNC;
3920
3921         writeq(val64, &tx_fifo->List_Control);
3922
3923         mmiowb();
3924
3925         put_off++;
3926         if (put_off == mac_control->fifos[queue].tx_curr_put_info.fifo_len + 1)
3927                 put_off = 0;
3928         mac_control->fifos[queue].tx_curr_put_info.offset = put_off;
3929
3930         /* Avoid "put" pointer going beyond "get" pointer */
3931         if (((put_off+1) == queue_len ? 0 : (put_off+1)) == get_off) {
3932                 sp->mac_control.stats_info->sw_stat.fifo_full_cnt++;
3933                 DBG_PRINT(TX_DBG,
3934                           "No free TxDs for xmit, Put: 0x%x Get:0x%x\n",
3935                           put_off, get_off);
3936                 netif_stop_queue(dev);
3937         }
3938
3939         dev->trans_start = jiffies;
3940         spin_unlock_irqrestore(&sp->tx_lock, flags);
3941
3942         return 0;
3943 }
3944
3945 static void
3946 s2io_alarm_handle(unsigned long data)
3947 {
3948         struct s2io_nic *sp = (struct s2io_nic *)data;
3949
3950         alarm_intr_handler(sp);
3951         mod_timer(&sp->alarm_timer, jiffies + HZ / 2);
3952 }
3953
3954 static int s2io_chk_rx_buffers(struct s2io_nic *sp, int rng_n)
3955 {
3956         int rxb_size, level;
3957
3958         if (!sp->lro) {
3959                 rxb_size = atomic_read(&sp->rx_bufs_left[rng_n]);
3960                 level = rx_buffer_level(sp, rxb_size, rng_n);
3961
3962                 if ((level == PANIC) && (!TASKLET_IN_USE)) {
3963                         int ret;
3964                         DBG_PRINT(INTR_DBG, "%s: Rx BD hit ", __FUNCTION__);
3965                         DBG_PRINT(INTR_DBG, "PANIC levels\n");
3966                         if ((ret = fill_rx_buffers(sp, rng_n)) == -ENOMEM) {
3967                                 DBG_PRINT(ERR_DBG, "Out of memory in %s",
3968                                           __FUNCTION__);
3969                                 clear_bit(0, (&sp->tasklet_status));
3970                                 return -1;
3971                         }
3972                         clear_bit(0, (&sp->tasklet_status));
3973                 } else if (level == LOW)
3974                         tasklet_schedule(&sp->task);
3975
3976         } else if (fill_rx_buffers(sp, rng_n) == -ENOMEM) {
3977                         DBG_PRINT(ERR_DBG, "%s:Out of memory", sp->dev->name);
3978                         DBG_PRINT(ERR_DBG, " in Rx Intr!!\n");
3979         }
3980         return 0;
3981 }
3982
3983 static irqreturn_t s2io_msi_handle(int irq, void *dev_id)
3984 {
3985         struct net_device *dev = (struct net_device *) dev_id;
3986         struct s2io_nic *sp = dev->priv;
3987         int i;
3988         struct mac_info *mac_control;
3989         struct config_param *config;
3990
3991         atomic_inc(&sp->isr_cnt);
3992         mac_control = &sp->mac_control;
3993         config = &sp->config;
3994         DBG_PRINT(INTR_DBG, "%s: MSI handler\n", __FUNCTION__);
3995
3996         /* If Intr is because of Rx Traffic */
3997         for (i = 0; i < config->rx_ring_num; i++)
3998                 rx_intr_handler(&mac_control->rings[i]);
3999
4000         /* If Intr is because of Tx Traffic */
4001         for (i = 0; i < config->tx_fifo_num; i++)
4002                 tx_intr_handler(&mac_control->fifos[i]);
4003
4004         /*
4005          * If the Rx buffer count is below the panic threshold then
4006          * reallocate the buffers from the interrupt handler itself,
4007          * else schedule a tasklet to reallocate the buffers.
4008          */
4009         for (i = 0; i < config->rx_ring_num; i++)
4010                 s2io_chk_rx_buffers(sp, i);
4011
4012         atomic_dec(&sp->isr_cnt);
4013         return IRQ_HANDLED;
4014 }
4015
4016 static irqreturn_t s2io_msix_ring_handle(int irq, void *dev_id)
4017 {
4018         struct ring_info *ring = (struct ring_info *)dev_id;
4019         struct s2io_nic *sp = ring->nic;
4020
4021         atomic_inc(&sp->isr_cnt);
4022
4023         rx_intr_handler(ring);
4024         s2io_chk_rx_buffers(sp, ring->ring_no);
4025
4026         atomic_dec(&sp->isr_cnt);
4027         return IRQ_HANDLED;
4028 }
4029
4030 static irqreturn_t s2io_msix_fifo_handle(int irq, void *dev_id)
4031 {
4032         struct fifo_info *fifo = (struct fifo_info *)dev_id;
4033         struct s2io_nic *sp = fifo->nic;
4034
4035         atomic_inc(&sp->isr_cnt);
4036         tx_intr_handler(fifo);
4037         atomic_dec(&sp->isr_cnt);
4038         return IRQ_HANDLED;
4039 }
4040 static void s2io_txpic_intr_handle(struct s2io_nic *sp)
4041 {
4042         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4043         u64 val64;
4044
4045         val64 = readq(&bar0->pic_int_status);
4046         if (val64 & PIC_INT_GPIO) {
4047                 val64 = readq(&bar0->gpio_int_reg);
4048                 if ((val64 & GPIO_INT_REG_LINK_DOWN) &&
4049                     (val64 & GPIO_INT_REG_LINK_UP)) {
4050                         /*
4051                          * This is unstable state so clear both up/down
4052                          * interrupt and adapter to re-evaluate the link state.
4053                          */
4054                         val64 |=  GPIO_INT_REG_LINK_DOWN;
4055                         val64 |= GPIO_INT_REG_LINK_UP;
4056                         writeq(val64, &bar0->gpio_int_reg);
4057                         val64 = readq(&bar0->gpio_int_mask);
4058                         val64 &= ~(GPIO_INT_MASK_LINK_UP |
4059                                    GPIO_INT_MASK_LINK_DOWN);
4060                         writeq(val64, &bar0->gpio_int_mask);
4061                 }
4062                 else if (val64 & GPIO_INT_REG_LINK_UP) {
4063                         val64 = readq(&bar0->adapter_status);
4064                                 /* Enable Adapter */
4065                         val64 = readq(&bar0->adapter_control);
4066                         val64 |= ADAPTER_CNTL_EN;
4067                         writeq(val64, &bar0->adapter_control);
4068                         val64 |= ADAPTER_LED_ON;
4069                         writeq(val64, &bar0->adapter_control);
4070                         if (!sp->device_enabled_once)
4071                                 sp->device_enabled_once = 1;
4072
4073                         s2io_link(sp, LINK_UP);
4074                         /*
4075                          * unmask link down interrupt and mask link-up
4076                          * intr
4077                          */
4078                         val64 = readq(&bar0->gpio_int_mask);
4079                         val64 &= ~GPIO_INT_MASK_LINK_DOWN;
4080                         val64 |= GPIO_INT_MASK_LINK_UP;
4081                         writeq(val64, &bar0->gpio_int_mask);
4082
4083                 }else if (val64 & GPIO_INT_REG_LINK_DOWN) {
4084                         val64 = readq(&bar0->adapter_status);
4085                         s2io_link(sp, LINK_DOWN);
4086                         /* Link is down so unmaks link up interrupt */
4087                         val64 = readq(&bar0->gpio_int_mask);
4088                         val64 &= ~GPIO_INT_MASK_LINK_UP;
4089                         val64 |= GPIO_INT_MASK_LINK_DOWN;
4090                         writeq(val64, &bar0->gpio_int_mask);
4091                 }
4092         }
4093         val64 = readq(&bar0->gpio_int_mask);
4094 }
4095
4096 /**
4097  *  s2io_isr - ISR handler of the device .
4098  *  @irq: the irq of the device.
4099  *  @dev_id: a void pointer to the dev structure of the NIC.
4100  *  Description:  This function is the ISR handler of the device. It
4101  *  identifies the reason for the interrupt and calls the relevant
4102  *  service routines. As a contongency measure, this ISR allocates the
4103  *  recv buffers, if their numbers are below the panic value which is
4104  *  presently set to 25% of the original number of rcv buffers allocated.
4105  *  Return value:
4106  *   IRQ_HANDLED: will be returned if IRQ was handled by this routine
4107  *   IRQ_NONE: will be returned if interrupt is not from our device
4108  */
4109 static irqreturn_t s2io_isr(int irq, void *dev_id)
4110 {
4111         struct net_device *dev = (struct net_device *) dev_id;
4112         struct s2io_nic *sp = dev->priv;
4113         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4114         int i;
4115         u64 reason = 0;
4116         struct mac_info *mac_control;
4117         struct config_param *config;
4118
4119         atomic_inc(&sp->isr_cnt);
4120         mac_control = &sp->mac_control;
4121         config = &sp->config;
4122
4123         /*
4124          * Identify the cause for interrupt and call the appropriate
4125          * interrupt handler. Causes for the interrupt could be;
4126          * 1. Rx of packet.
4127          * 2. Tx complete.
4128          * 3. Link down.
4129          * 4. Error in any functional blocks of the NIC.
4130          */
4131         reason = readq(&bar0->general_int_status);
4132
4133         if (!reason) {
4134                 /* The interrupt was not raised by us. */
4135                 atomic_dec(&sp->isr_cnt);
4136                 return IRQ_NONE;
4137         }
4138         else if (unlikely(reason == S2IO_MINUS_ONE) ) {
4139                 /* Disable device and get out */
4140                 atomic_dec(&sp->isr_cnt);
4141                 return IRQ_NONE;
4142         }
4143
4144         if (napi) {
4145                 if (reason & GEN_INTR_RXTRAFFIC) {
4146                         if ( likely ( netif_rx_schedule_prep(dev)) ) {
4147                                 __netif_rx_schedule(dev);
4148                                 writeq(S2IO_MINUS_ONE, &bar0->rx_traffic_mask);
4149                         }
4150                         else
4151                                 writeq(S2IO_MINUS_ONE, &bar0->rx_traffic_int);
4152                 }
4153         } else {
4154                 /*
4155                  * Rx handler is called by default, without checking for the
4156                  * cause of interrupt.
4157                  * rx_traffic_int reg is an R1 register, writing all 1's
4158                  * will ensure that the actual interrupt causing bit get's
4159                  * cleared and hence a read can be avoided.
4160                  */
4161                 if (reason & GEN_INTR_RXTRAFFIC)
4162                         writeq(S2IO_MINUS_ONE, &bar0->rx_traffic_int);
4163
4164                 for (i = 0; i < config->rx_ring_num; i++) {
4165                         rx_intr_handler(&mac_control->rings[i]);
4166                 }
4167         }
4168
4169         /*
4170          * tx_traffic_int reg is an R1 register, writing all 1's
4171          * will ensure that the actual interrupt causing bit get's
4172          * cleared and hence a read can be avoided.
4173          */
4174         if (reason & GEN_INTR_TXTRAFFIC)
4175                 writeq(S2IO_MINUS_ONE, &bar0->tx_traffic_int);
4176
4177         for (i = 0; i < config->tx_fifo_num; i++)
4178                 tx_intr_handler(&mac_control->fifos[i]);
4179
4180         if (reason & GEN_INTR_TXPIC)
4181                 s2io_txpic_intr_handle(sp);
4182         /*
4183          * If the Rx buffer count is below the panic threshold then
4184          * reallocate the buffers from the interrupt handler itself,
4185          * else schedule a tasklet to reallocate the buffers.
4186          */
4187         if (!napi) {
4188                 for (i = 0; i < config->rx_ring_num; i++)
4189                         s2io_chk_rx_buffers(sp, i);
4190         }
4191
4192         writeq(0, &bar0->general_int_mask);
4193         readl(&bar0->general_int_status);
4194
4195         atomic_dec(&sp->isr_cnt);
4196         return IRQ_HANDLED;
4197 }
4198
4199 /**
4200  * s2io_updt_stats -
4201  */
4202 static void s2io_updt_stats(struct s2io_nic *sp)
4203 {
4204         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4205         u64 val64;
4206         int cnt = 0;
4207
4208         if (atomic_read(&sp->card_state) == CARD_UP) {
4209                 /* Apprx 30us on a 133 MHz bus */
4210                 val64 = SET_UPDT_CLICKS(10) |
4211                         STAT_CFG_ONE_SHOT_EN | STAT_CFG_STAT_EN;
4212                 writeq(val64, &bar0->stat_cfg);
4213                 do {
4214                         udelay(100);
4215                         val64 = readq(&bar0->stat_cfg);
4216                         if (!(val64 & BIT(0)))
4217                                 break;
4218                         cnt++;
4219                         if (cnt == 5)
4220                                 break; /* Updt failed */
4221                 } while(1);
4222         } else {
4223                 memset(sp->mac_control.stats_info, 0, sizeof(struct stat_block));
4224         }
4225 }
4226
4227 /**
4228  *  s2io_get_stats - Updates the device statistics structure.
4229  *  @dev : pointer to the device structure.
4230  *  Description:
4231  *  This function updates the device statistics structure in the s2io_nic
4232  *  structure and returns a pointer to the same.
4233  *  Return value:
4234  *  pointer to the updated net_device_stats structure.
4235  */
4236
4237 static struct net_device_stats *s2io_get_stats(struct net_device *dev)
4238 {
4239         struct s2io_nic *sp = dev->priv;
4240         struct mac_info *mac_control;
4241         struct config_param *config;
4242
4243
4244         mac_control = &sp->mac_control;
4245         config = &sp->config;
4246
4247         /* Configure Stats for immediate updt */
4248         s2io_updt_stats(sp);
4249
4250         sp->stats.tx_packets =
4251                 le32_to_cpu(mac_control->stats_info->tmac_frms);
4252         sp->stats.tx_errors =
4253                 le32_to_cpu(mac_control->stats_info->tmac_any_err_frms);
4254         sp->stats.rx_errors =
4255                 le64_to_cpu(mac_control->stats_info->rmac_drop_frms);
4256         sp->stats.multicast =
4257                 le32_to_cpu(mac_control->stats_info->rmac_vld_mcst_frms);
4258         sp->stats.rx_length_errors =
4259                 le64_to_cpu(mac_control->stats_info->rmac_long_frms);
4260
4261         return (&sp->stats);
4262 }
4263
4264 /**
4265  *  s2io_set_multicast - entry point for multicast address enable/disable.
4266  *  @dev : pointer to the device structure
4267  *  Description:
4268  *  This function is a driver entry point which gets called by the kernel
4269  *  whenever multicast addresses must be enabled/disabled. This also gets
4270  *  called to set/reset promiscuous mode. Depending on the deivce flag, we
4271  *  determine, if multicast address must be enabled or if promiscuous mode
4272  *  is to be disabled etc.
4273  *  Return value:
4274  *  void.
4275  */
4276
4277 static void s2io_set_multicast(struct net_device *dev)
4278 {
4279         int i, j, prev_cnt;
4280         struct dev_mc_list *mclist;
4281         struct s2io_nic *sp = dev->priv;
4282         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4283         u64 val64 = 0, multi_mac = 0x010203040506ULL, mask =
4284             0xfeffffffffffULL;
4285         u64 dis_addr = 0xffffffffffffULL, mac_addr = 0;
4286         void __iomem *add;
4287
4288         if ((dev->flags & IFF_ALLMULTI) && (!sp->m_cast_flg)) {
4289                 /*  Enable all Multicast addresses */
4290                 writeq(RMAC_ADDR_DATA0_MEM_ADDR(multi_mac),
4291                        &bar0->rmac_addr_data0_mem);
4292                 writeq(RMAC_ADDR_DATA1_MEM_MASK(mask),
4293                        &bar0->rmac_addr_data1_mem);
4294                 val64 = RMAC_ADDR_CMD_MEM_WE |
4295                     RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
4296                     RMAC_ADDR_CMD_MEM_OFFSET(MAC_MC_ALL_MC_ADDR_OFFSET);
4297                 writeq(val64, &bar0->rmac_addr_cmd_mem);
4298                 /* Wait till command completes */
4299                 wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
4300                                       RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING);
4301
4302                 sp->m_cast_flg = 1;
4303                 sp->all_multi_pos = MAC_MC_ALL_MC_ADDR_OFFSET;
4304         } else if ((dev->flags & IFF_ALLMULTI) && (sp->m_cast_flg)) {
4305                 /*  Disable all Multicast addresses */
4306                 writeq(RMAC_ADDR_DATA0_MEM_ADDR(dis_addr),
4307                        &bar0->rmac_addr_data0_mem);
4308                 writeq(RMAC_ADDR_DATA1_MEM_MASK(0x0),
4309                        &bar0->rmac_addr_data1_mem);
4310                 val64 = RMAC_ADDR_CMD_MEM_WE |
4311                     RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
4312                     RMAC_ADDR_CMD_MEM_OFFSET(sp->all_multi_pos);
4313                 writeq(val64, &bar0->rmac_addr_cmd_mem);
4314                 /* Wait till command completes */
4315                 wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
4316                                       RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING);
4317
4318                 sp->m_cast_flg = 0;
4319                 sp->all_multi_pos = 0;
4320         }
4321
4322         if ((dev->flags & IFF_PROMISC) && (!sp->promisc_flg)) {
4323                 /*  Put the NIC into promiscuous mode */
4324                 add = &bar0->mac_cfg;
4325                 val64 = readq(&bar0->mac_cfg);
4326                 val64 |= MAC_CFG_RMAC_PROM_ENABLE;
4327
4328                 writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
4329                 writel((u32) val64, add);
4330                 writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
4331                 writel((u32) (val64 >> 32), (add + 4));
4332
4333                 val64 = readq(&bar0->mac_cfg);
4334                 sp->promisc_flg = 1;
4335                 DBG_PRINT(INFO_DBG, "%s: entered promiscuous mode\n",
4336                           dev->name);
4337         } else if (!(dev->flags & IFF_PROMISC) && (sp->promisc_flg)) {
4338                 /*  Remove the NIC from promiscuous mode */
4339                 add = &bar0->mac_cfg;
4340                 val64 = readq(&bar0->mac_cfg);
4341                 val64 &= ~MAC_CFG_RMAC_PROM_ENABLE;
4342
4343                 writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
4344                 writel((u32) val64, add);
4345                 writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
4346                 writel((u32) (val64 >> 32), (add + 4));
4347
4348                 val64 = readq(&bar0->mac_cfg);
4349                 sp->promisc_flg = 0;
4350                 DBG_PRINT(INFO_DBG, "%s: left promiscuous mode\n",
4351                           dev->name);
4352         }
4353
4354         /*  Update individual M_CAST address list */
4355         if ((!sp->m_cast_flg) && dev->mc_count) {
4356                 if (dev->mc_count >
4357                     (MAX_ADDRS_SUPPORTED - MAC_MC_ADDR_START_OFFSET - 1)) {
4358                         DBG_PRINT(ERR_DBG, "%s: No more Rx filters ",
4359                                   dev->name);
4360                         DBG_PRINT(ERR_DBG, "can be added, please enable ");
4361                         DBG_PRINT(ERR_DBG, "ALL_MULTI instead\n");
4362                         return;
4363                 }
4364
4365                 prev_cnt = sp->mc_addr_count;
4366                 sp->mc_addr_count = dev->mc_count;
4367
4368                 /* Clear out the previous list of Mc in the H/W. */
4369                 for (i = 0; i < prev_cnt; i++) {
4370                         writeq(RMAC_ADDR_DATA0_MEM_ADDR(dis_addr),
4371                                &bar0->rmac_addr_data0_mem);
4372                         writeq(RMAC_ADDR_DATA1_MEM_MASK(0ULL),
4373                                 &bar0->rmac_addr_data1_mem);
4374                         val64 = RMAC_ADDR_CMD_MEM_WE |
4375                             RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
4376                             RMAC_ADDR_CMD_MEM_OFFSET
4377                             (MAC_MC_ADDR_START_OFFSET + i);
4378                         writeq(val64, &bar0->rmac_addr_cmd_mem);
4379
4380                         /* Wait for command completes */
4381                         if (wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
4382                                       RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING)) {
4383                                 DBG_PRINT(ERR_DBG, "%s: Adding ",
4384                                           dev->name);
4385                                 DBG_PRINT(ERR_DBG, "Multicasts failed\n");
4386                                 return;
4387                         }
4388                 }
4389
4390                 /* Create the new Rx filter list and update the same in H/W. */
4391                 for (i = 0, mclist = dev->mc_list; i < dev->mc_count;
4392                      i++, mclist = mclist->next) {
4393                         memcpy(sp->usr_addrs[i].addr, mclist->dmi_addr,
4394                                ETH_ALEN);
4395                         mac_addr = 0;
4396                         for (j = 0; j < ETH_ALEN; j++) {
4397                                 mac_addr |= mclist->dmi_addr[j];
4398                                 mac_addr <<= 8;
4399                         }
4400                         mac_addr >>= 8;
4401                         writeq(RMAC_ADDR_DATA0_MEM_ADDR(mac_addr),
4402                                &bar0->rmac_addr_data0_mem);
4403                         writeq(RMAC_ADDR_DATA1_MEM_MASK(0ULL),
4404                                 &bar0->rmac_addr_data1_mem);
4405                         val64 = RMAC_ADDR_CMD_MEM_WE |
4406                             RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
4407                             RMAC_ADDR_CMD_MEM_OFFSET
4408                             (i + MAC_MC_ADDR_START_OFFSET);
4409                         writeq(val64, &bar0->rmac_addr_cmd_mem);
4410
4411                         /* Wait for command completes */
4412                         if (wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
4413                                       RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING)) {
4414                                 DBG_PRINT(ERR_DBG, "%s: Adding ",
4415                                           dev->name);
4416                                 DBG_PRINT(ERR_DBG, "Multicasts failed\n");
4417                                 return;
4418                         }
4419                 }
4420         }
4421 }
4422
4423 /**
4424  *  s2io_set_mac_addr - Programs the Xframe mac address
4425  *  @dev : pointer to the device structure.
4426  *  @addr: a uchar pointer to the new mac address which is to be set.
4427  *  Description : This procedure will program the Xframe to receive
4428  *  frames with new Mac Address
4429  *  Return value: SUCCESS on success and an appropriate (-)ve integer
4430  *  as defined in errno.h file on failure.
4431  */
4432
4433 static int s2io_set_mac_addr(struct net_device *dev, u8 * addr)
4434 {
4435         struct s2io_nic *sp = dev->priv;
4436         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4437         register u64 val64, mac_addr = 0;
4438         int i;
4439
4440         /*
4441          * Set the new MAC address as the new unicast filter and reflect this
4442          * change on the device address registered with the OS. It will be
4443          * at offset 0.
4444          */
4445         for (i = 0; i < ETH_ALEN; i++) {
4446                 mac_addr <<= 8;
4447                 mac_addr |= addr[i];
4448         }
4449
4450         writeq(RMAC_ADDR_DATA0_MEM_ADDR(mac_addr),
4451                &bar0->rmac_addr_data0_mem);
4452
4453         val64 =
4454             RMAC_ADDR_CMD_MEM_WE | RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
4455             RMAC_ADDR_CMD_MEM_OFFSET(0);
4456         writeq(val64, &bar0->rmac_addr_cmd_mem);
4457         /* Wait till command completes */
4458         if (wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
4459                       RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING)) {
4460                 DBG_PRINT(ERR_DBG, "%s: set_mac_addr failed\n", dev->name);
4461                 return FAILURE;
4462         }
4463
4464         return SUCCESS;
4465 }
4466
4467 /**
4468  * s2io_ethtool_sset - Sets different link parameters.
4469  * @sp : private member of the device structure, which is a pointer to the  * s2io_nic structure.
4470  * @info: pointer to the structure with parameters given by ethtool to set
4471  * link information.
4472  * Description:
4473  * The function sets different link parameters provided by the user onto
4474  * the NIC.
4475  * Return value:
4476  * 0 on success.
4477 */
4478
4479 static int s2io_ethtool_sset(struct net_device *dev,
4480                              struct ethtool_cmd *info)
4481 {
4482         struct s2io_nic *sp = dev->priv;
4483         if ((info->autoneg == AUTONEG_ENABLE) ||
4484             (info->speed != SPEED_10000) || (info->duplex != DUPLEX_FULL))
4485                 return -EINVAL;
4486         else {
4487                 s2io_close(sp->dev);
4488                 s2io_open(sp->dev);
4489         }
4490
4491         return 0;
4492 }
4493
4494 /**
4495  * s2io_ethtol_gset - Return link specific information.
4496  * @sp : private member of the device structure, pointer to the
4497  *      s2io_nic structure.
4498  * @info : pointer to the structure with parameters given by ethtool
4499  * to return link information.
4500  * Description:
4501  * Returns link specific information like speed, duplex etc.. to ethtool.
4502  * Return value :
4503  * return 0 on success.
4504  */
4505
4506 static int s2io_ethtool_gset(struct net_device *dev, struct ethtool_cmd *info)
4507 {
4508         struct s2io_nic *sp = dev->priv;
4509         info->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
4510         info->advertising = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
4511         info->port = PORT_FIBRE;
4512         /* info->transceiver?? TODO */
4513
4514         if (netif_carrier_ok(sp->dev)) {
4515                 info->speed = 10000;
4516                 info->duplex = DUPLEX_FULL;
4517         } else {
4518                 info->speed = -1;
4519                 info->duplex = -1;
4520         }
4521
4522         info->autoneg = AUTONEG_DISABLE;
4523         return 0;
4524 }
4525
4526 /**
4527  * s2io_ethtool_gdrvinfo - Returns driver specific information.
4528  * @sp : private member of the device structure, which is a pointer to the
4529  * s2io_nic structure.
4530  * @info : pointer to the structure with parameters given by ethtool to
4531  * return driver information.
4532  * Description:
4533  * Returns driver specefic information like name, version etc.. to ethtool.
4534  * Return value:
4535  *  void
4536  */
4537
4538 static void s2io_ethtool_gdrvinfo(struct net_device *dev,
4539                                   struct ethtool_drvinfo *info)
4540 {
4541         struct s2io_nic *sp = dev->priv;
4542
4543         strncpy(info->driver, s2io_driver_name, sizeof(info->driver));
4544         strncpy(info->version, s2io_driver_version, sizeof(info->version));
4545         strncpy(info->fw_version, "", sizeof(info->fw_version));
4546         strncpy(info->bus_info, pci_name(sp->pdev), sizeof(info->bus_info));
4547         info->regdump_len = XENA_REG_SPACE;
4548         info->eedump_len = XENA_EEPROM_SPACE;
4549         info->testinfo_len = S2IO_TEST_LEN;
4550         info->n_stats = S2IO_STAT_LEN;
4551 }
4552
4553 /**
4554  *  s2io_ethtool_gregs - dumps the entire space of Xfame into the buffer.
4555  *  @sp: private member of the device structure, which is a pointer to the
4556  *  s2io_nic structure.
4557  *  @regs : pointer to the structure with parameters given by ethtool for
4558  *  dumping the registers.
4559  *  @reg_space: The input argumnet into which all the registers are dumped.
4560  *  Description:
4561  *  Dumps the entire register space of xFrame NIC into the user given
4562  *  buffer area.
4563  * Return value :
4564  * void .
4565 */
4566
4567 static void s2io_ethtool_gregs(struct net_device *dev,
4568                                struct ethtool_regs *regs, void *space)
4569 {
4570         int i;
4571         u64 reg;
4572         u8 *reg_space = (u8 *) space;
4573         struct s2io_nic *sp = dev->priv;
4574
4575         regs->len = XENA_REG_SPACE;
4576         regs->version = sp->pdev->subsystem_device;
4577
4578         for (i = 0; i < regs->len; i += 8) {
4579                 reg = readq(sp->bar0 + i);
4580                 memcpy((reg_space + i), &reg, 8);
4581         }
4582 }
4583
4584 /**
4585  *  s2io_phy_id  - timer function that alternates adapter LED.
4586  *  @data : address of the private member of the device structure, which
4587  *  is a pointer to the s2io_nic structure, provided as an u32.
4588  * Description: This is actually the timer function that alternates the
4589  * adapter LED bit of the adapter control bit to set/reset every time on
4590  * invocation. The timer is set for 1/2 a second, hence tha NIC blinks
4591  *  once every second.
4592 */
4593 static void s2io_phy_id(unsigned long data)
4594 {
4595         struct s2io_nic *sp = (struct s2io_nic *) data;
4596         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4597         u64 val64 = 0;
4598         u16 subid;
4599
4600         subid = sp->pdev->subsystem_device;
4601         if ((sp->device_type == XFRAME_II_DEVICE) ||
4602                    ((subid & 0xFF) >= 0x07)) {
4603                 val64 = readq(&bar0->gpio_control);
4604                 val64 ^= GPIO_CTRL_GPIO_0;
4605                 writeq(val64, &bar0->gpio_control);
4606         } else {
4607                 val64 = readq(&bar0->adapter_control);
4608                 val64 ^= ADAPTER_LED_ON;
4609                 writeq(val64, &bar0->adapter_control);
4610         }
4611
4612         mod_timer(&sp->id_timer, jiffies + HZ / 2);
4613 }
4614
4615 /**
4616  * s2io_ethtool_idnic - To physically identify the nic on the system.
4617  * @sp : private member of the device structure, which is a pointer to the
4618  * s2io_nic structure.
4619  * @id : pointer to the structure with identification parameters given by
4620  * ethtool.
4621  * Description: Used to physically identify the NIC on the system.
4622  * The Link LED will blink for a time specified by the user for
4623  * identification.
4624  * NOTE: The Link has to be Up to be able to blink the LED. Hence
4625  * identification is possible only if it's link is up.
4626  * Return value:
4627  * int , returns 0 on success
4628  */
4629
4630 static int s2io_ethtool_idnic(struct net_device *dev, u32 data)
4631 {
4632         u64 val64 = 0, last_gpio_ctrl_val;
4633         struct s2io_nic *sp = dev->priv;
4634         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4635         u16 subid;
4636
4637         subid = sp->pdev->subsystem_device;
4638         last_gpio_ctrl_val = readq(&bar0->gpio_control);
4639         if ((sp->device_type == XFRAME_I_DEVICE) &&
4640                 ((subid & 0xFF) < 0x07)) {
4641                 val64 = readq(&bar0->adapter_control);
4642                 if (!(val64 & ADAPTER_CNTL_EN)) {
4643                         printk(KERN_ERR
4644                                "Adapter Link down, cannot blink LED\n");
4645                         return -EFAULT;
4646                 }
4647         }
4648         if (sp->id_timer.function == NULL) {
4649                 init_timer(&sp->id_timer);
4650                 sp->id_timer.function = s2io_phy_id;
4651                 sp->id_timer.data = (unsigned long) sp;
4652         }
4653         mod_timer(&sp->id_timer, jiffies);
4654         if (data)
4655                 msleep_interruptible(data * HZ);
4656         else
4657                 msleep_interruptible(MAX_FLICKER_TIME);
4658         del_timer_sync(&sp->id_timer);
4659
4660         if (CARDS_WITH_FAULTY_LINK_INDICATORS(sp->device_type, subid)) {
4661                 writeq(last_gpio_ctrl_val, &bar0->gpio_control);
4662                 last_gpio_ctrl_val = readq(&bar0->gpio_control);
4663         }
4664
4665         return 0;
4666 }
4667
4668 /**
4669  * s2io_ethtool_getpause_data -Pause frame frame generation and reception.
4670  * @sp : private member of the device structure, which is a pointer to the
4671  *      s2io_nic structure.
4672  * @ep : pointer to the structure with pause parameters given by ethtool.
4673  * Description:
4674  * Returns the Pause frame generation and reception capability of the NIC.
4675  * Return value:
4676  *  void
4677  */
4678 static void s2io_ethtool_getpause_data(struct net_device *dev,
4679                                        struct ethtool_pauseparam *ep)
4680 {
4681         u64 val64;
4682         struct s2io_nic *sp = dev->priv;
4683         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4684
4685         val64 = readq(&bar0->rmac_pause_cfg);
4686         if (val64 & RMAC_PAUSE_GEN_ENABLE)
4687                 ep->tx_pause = TRUE;
4688         if (val64 & RMAC_PAUSE_RX_ENABLE)
4689                 ep->rx_pause = TRUE;
4690         ep->autoneg = FALSE;
4691 }
4692
4693 /**
4694  * s2io_ethtool_setpause_data -  set/reset pause frame generation.
4695  * @sp : private member of the device structure, which is a pointer to the
4696  *      s2io_nic structure.
4697  * @ep : pointer to the structure with pause parameters given by ethtool.
4698  * Description:
4699  * It can be used to set or reset Pause frame generation or reception
4700  * support of the NIC.
4701  * Return value:
4702  * int, returns 0 on Success
4703  */
4704
4705 static int s2io_ethtool_setpause_data(struct net_device *dev,
4706                                struct ethtool_pauseparam *ep)
4707 {
4708         u64 val64;
4709         struct s2io_nic *sp = dev->priv;
4710         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4711
4712         val64 = readq(&bar0->rmac_pause_cfg);
4713         if (ep->tx_pause)
4714                 val64 |= RMAC_PAUSE_GEN_ENABLE;
4715         else
4716                 val64 &= ~RMAC_PAUSE_GEN_ENABLE;
4717         if (ep->rx_pause)
4718                 val64 |= RMAC_PAUSE_RX_ENABLE;
4719         else
4720                 val64 &= ~RMAC_PAUSE_RX_ENABLE;
4721         writeq(val64, &bar0->rmac_pause_cfg);
4722         return 0;
4723 }
4724
4725 /**
4726  * read_eeprom - reads 4 bytes of data from user given offset.
4727  * @sp : private member of the device structure, which is a pointer to the
4728  *      s2io_nic structure.
4729  * @off : offset at which the data must be written
4730  * @data : Its an output parameter where the data read at the given
4731  *      offset is stored.
4732  * Description:
4733  * Will read 4 bytes of data from the user given offset and return the
4734  * read data.
4735  * NOTE: Will allow to read only part of the EEPROM visible through the
4736  *   I2C bus.
4737  * Return value:
4738  *  -1 on failure and 0 on success.
4739  */
4740
4741 #define S2IO_DEV_ID             5
4742 static int read_eeprom(struct s2io_nic * sp, int off, u64 * data)
4743 {
4744         int ret = -1;
4745         u32 exit_cnt = 0;
4746         u64 val64;
4747         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4748
4749         if (sp->device_type == XFRAME_I_DEVICE) {
4750                 val64 = I2C_CONTROL_DEV_ID(S2IO_DEV_ID) | I2C_CONTROL_ADDR(off) |
4751                     I2C_CONTROL_BYTE_CNT(0x3) | I2C_CONTROL_READ |
4752                     I2C_CONTROL_CNTL_START;
4753                 SPECIAL_REG_WRITE(val64, &bar0->i2c_control, LF);
4754
4755                 while (exit_cnt < 5) {
4756                         val64 = readq(&bar0->i2c_control);
4757                         if (I2C_CONTROL_CNTL_END(val64)) {
4758                                 *data = I2C_CONTROL_GET_DATA(val64);
4759                                 ret = 0;
4760                                 break;
4761                         }
4762                         msleep(50);
4763                         exit_cnt++;
4764                 }
4765         }
4766
4767         if (sp->device_type == XFRAME_II_DEVICE) {
4768                 val64 = SPI_CONTROL_KEY(0x9) | SPI_CONTROL_SEL1 |
4769                         SPI_CONTROL_BYTECNT(0x3) |
4770                         SPI_CONTROL_CMD(0x3) | SPI_CONTROL_ADDR(off);
4771                 SPECIAL_REG_WRITE(val64, &bar0->spi_control, LF);
4772                 val64 |= SPI_CONTROL_REQ;
4773                 SPECIAL_REG_WRITE(val64, &bar0->spi_control, LF);
4774                 while (exit_cnt < 5) {
4775                         val64 = readq(&bar0->spi_control);
4776                         if (val64 & SPI_CONTROL_NACK) {
4777                                 ret = 1;
4778                                 break;
4779                         } else if (val64 & SPI_CONTROL_DONE) {
4780                                 *data = readq(&bar0->spi_data);
4781                                 *data &= 0xffffff;
4782                                 ret = 0;
4783                                 break;
4784                         }
4785                         msleep(50);
4786                         exit_cnt++;
4787                 }
4788         }
4789         return ret;
4790 }
4791
4792 /**
4793  *  write_eeprom - actually writes the relevant part of the data value.
4794  *  @sp : private member of the device structure, which is a pointer to the
4795  *       s2io_nic structure.
4796  *  @off : offset at which the data must be written
4797  *  @data : The data that is to be written
4798  *  @cnt : Number of bytes of the data that are actually to be written into
4799  *  the Eeprom. (max of 3)
4800  * Description:
4801  *  Actually writes the relevant part of the data value into the Eeprom
4802  *  through the I2C bus.
4803  * Return value:
4804  *  0 on success, -1 on failure.
4805  */
4806
4807 static int write_eeprom(struct s2io_nic * sp, int off, u64 data, int cnt)
4808 {
4809         int exit_cnt = 0, ret = -1;
4810         u64 val64;
4811         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4812
4813         if (sp->device_type == XFRAME_I_DEVICE) {
4814                 val64 = I2C_CONTROL_DEV_ID(S2IO_DEV_ID) | I2C_CONTROL_ADDR(off) |
4815                     I2C_CONTROL_BYTE_CNT(cnt) | I2C_CONTROL_SET_DATA((u32)data) |
4816                     I2C_CONTROL_CNTL_START;
4817                 SPECIAL_REG_WRITE(val64, &bar0->i2c_control, LF);
4818
4819                 while (exit_cnt < 5) {
4820                         val64 = readq(&bar0->i2c_control);
4821                         if (I2C_CONTROL_CNTL_END(val64)) {
4822                                 if (!(val64 & I2C_CONTROL_NACK))
4823                                         ret = 0;
4824                                 break;
4825                         }
4826                         msleep(50);
4827                         exit_cnt++;
4828                 }
4829         }
4830
4831         if (sp->device_type == XFRAME_II_DEVICE) {
4832                 int write_cnt = (cnt == 8) ? 0 : cnt;
4833                 writeq(SPI_DATA_WRITE(data,(cnt<<3)), &bar0->spi_data);
4834
4835                 val64 = SPI_CONTROL_KEY(0x9) | SPI_CONTROL_SEL1 |
4836                         SPI_CONTROL_BYTECNT(write_cnt) |
4837                         SPI_CONTROL_CMD(0x2) | SPI_CONTROL_ADDR(off);
4838                 SPECIAL_REG_WRITE(val64, &bar0->spi_control, LF);
4839                 val64 |= SPI_CONTROL_REQ;
4840                 SPECIAL_REG_WRITE(val64, &bar0->spi_control, LF);
4841                 while (exit_cnt < 5) {
4842                         val64 = readq(&bar0->spi_control);
4843                         if (val64 & SPI_CONTROL_NACK) {
4844                                 ret = 1;
4845                                 break;
4846                         } else if (val64 & SPI_CONTROL_DONE) {
4847                                 ret = 0;
4848                                 break;
4849                         }
4850                         msleep(50);
4851                         exit_cnt++;
4852                 }
4853         }
4854         return ret;
4855 }
4856 static void s2io_vpd_read(struct s2io_nic *nic)
4857 {
4858         u8 *vpd_data;
4859         u8 data;
4860         int i=0, cnt, fail = 0;
4861         int vpd_addr = 0x80;
4862
4863         if (nic->device_type == XFRAME_II_DEVICE) {
4864                 strcpy(nic->product_name, "Xframe II 10GbE network adapter");
4865                 vpd_addr = 0x80;
4866         }
4867         else {
4868                 strcpy(nic->product_name, "Xframe I 10GbE network adapter");
4869                 vpd_addr = 0x50;
4870         }
4871         strcpy(nic->serial_num, "NOT AVAILABLE");
4872
4873         vpd_data = kmalloc(256, GFP_KERNEL);
4874         if (!vpd_data)
4875                 return;
4876
4877         for (i = 0; i < 256; i +=4 ) {
4878                 pci_write_config_byte(nic->pdev, (vpd_addr + 2), i);
4879                 pci_read_config_byte(nic->pdev,  (vpd_addr + 2), &data);
4880                 pci_write_config_byte(nic->pdev, (vpd_addr + 3), 0);
4881                 for (cnt = 0; cnt <5; cnt++) {
4882                         msleep(2);
4883                         pci_read_config_byte(nic->pdev, (vpd_addr + 3), &data);
4884                         if (data == 0x80)
4885                                 break;
4886                 }
4887                 if (cnt >= 5) {
4888                         DBG_PRINT(ERR_DBG, "Read of VPD data failed\n");
4889                         fail = 1;
4890                         break;
4891                 }
4892                 pci_read_config_dword(nic->pdev,  (vpd_addr + 4),
4893                                       (u32 *)&vpd_data[i]);
4894         }
4895
4896         if(!fail) {
4897                 /* read serial number of adapter */
4898                 for (cnt = 0; cnt < 256; cnt++) {
4899                 if ((vpd_data[cnt] == 'S') &&
4900                         (vpd_data[cnt+1] == 'N') &&
4901                         (vpd_data[cnt+2] < VPD_STRING_LEN)) {
4902                                 memset(nic->serial_num, 0, VPD_STRING_LEN);
4903                                 memcpy(nic->serial_num, &vpd_data[cnt + 3],
4904                                         vpd_data[cnt+2]);
4905                                 break;
4906                         }
4907                 }
4908         }
4909
4910         if ((!fail) && (vpd_data[1] < VPD_STRING_LEN)) {
4911                 memset(nic->product_name, 0, vpd_data[1]);
4912                 memcpy(nic->product_name, &vpd_data[3], vpd_data[1]);
4913         }
4914         kfree(vpd_data);
4915 }
4916
4917 /**
4918  *  s2io_ethtool_geeprom  - reads the value stored in the Eeprom.
4919  *  @sp : private member of the device structure, which is a pointer to the *       s2io_nic structure.
4920  *  @eeprom : pointer to the user level structure provided by ethtool,
4921  *  containing all relevant information.
4922  *  @data_buf : user defined value to be written into Eeprom.
4923  *  Description: Reads the values stored in the Eeprom at given offset
4924  *  for a given length. Stores these values int the input argument data
4925  *  buffer 'data_buf' and returns these to the caller (ethtool.)
4926  *  Return value:
4927  *  int  0 on success
4928  */
4929
4930 static int s2io_ethtool_geeprom(struct net_device *dev,
4931                          struct ethtool_eeprom *eeprom, u8 * data_buf)
4932 {
4933         u32 i, valid;
4934         u64 data;
4935         struct s2io_nic *sp = dev->priv;
4936
4937         eeprom->magic = sp->pdev->vendor | (sp->pdev->device << 16);
4938
4939         if ((eeprom->offset + eeprom->len) > (XENA_EEPROM_SPACE))
4940                 eeprom->len = XENA_EEPROM_SPACE - eeprom->offset;
4941
4942         for (i = 0; i < eeprom->len; i += 4) {
4943                 if (read_eeprom(sp, (eeprom->offset + i), &data)) {
4944                         DBG_PRINT(ERR_DBG, "Read of EEPROM failed\n");
4945                         return -EFAULT;
4946                 }
4947                 valid = INV(data);
4948                 memcpy((data_buf + i), &valid, 4);
4949         }
4950         return 0;
4951 }
4952
4953 /**
4954  *  s2io_ethtool_seeprom - tries to write the user provided value in Eeprom
4955  *  @sp : private member of the device structure, which is a pointer to the
4956  *  s2io_nic structure.
4957  *  @eeprom : pointer to the user level structure provided by ethtool,
4958  *  containing all relevant information.
4959  *  @data_buf ; user defined value to be written into Eeprom.
4960  *  Description:
4961  *  Tries to write the user provided value in the Eeprom, at the offset
4962  *  given by the user.
4963  *  Return value:
4964  *  0 on success, -EFAULT on failure.
4965  */
4966
4967 static int s2io_ethtool_seeprom(struct net_device *dev,
4968                                 struct ethtool_eeprom *eeprom,
4969                                 u8 * data_buf)
4970 {
4971         int len = eeprom->len, cnt = 0;
4972         u64 valid = 0, data;
4973         struct s2io_nic *sp = dev->priv;
4974
4975         if (eeprom->magic != (sp->pdev->vendor | (sp->pdev->device << 16))) {
4976                 DBG_PRINT(ERR_DBG,
4977                           "ETHTOOL_WRITE_EEPROM Err: Magic value ");
4978                 DBG_PRINT(ERR_DBG, "is wrong, Its not 0x%x\n",
4979                           eeprom->magic);
4980                 return -EFAULT;
4981         }
4982
4983         while (len) {
4984                 data = (u32) data_buf[cnt] & 0x000000FF;
4985                 if (data) {
4986                         valid = (u32) (data << 24);
4987                 } else
4988                         valid = data;
4989
4990                 if (write_eeprom(sp, (eeprom->offset + cnt), valid, 0)) {
4991                         DBG_PRINT(ERR_DBG,
4992                                   "ETHTOOL_WRITE_EEPROM Err: Cannot ");
4993                         DBG_PRINT(ERR_DBG,
4994                                   "write into the specified offset\n");
4995                         return -EFAULT;
4996                 }
4997                 cnt++;
4998                 len--;
4999         }
5000
5001         return 0;
5002 }
5003
5004 /**
5005  * s2io_register_test - reads and writes into all clock domains.
5006  * @sp : private member of the device structure, which is a pointer to the
5007  * s2io_nic structure.
5008  * @data : variable that returns the result of each of the test conducted b
5009  * by the driver.
5010  * Description:
5011  * Read and write into all clock domains. The NIC has 3 clock domains,
5012  * see that registers in all the three regions are accessible.
5013  * Return value:
5014  * 0 on success.
5015  */
5016
5017 static int s2io_register_test(struct s2io_nic * sp, uint64_t * data)
5018 {
5019         struct XENA_dev_config __iomem *bar0 = sp->bar0;
5020         u64 val64 = 0, exp_val;
5021         int fail = 0;
5022
5023         val64 = readq(&bar0->pif_rd_swapper_fb);
5024         if (val64 != 0x123456789abcdefULL) {
5025                 fail = 1;
5026                 DBG_PRINT(INFO_DBG, "Read Test level 1 fails\n");
5027         }
5028
5029         val64 = readq(&bar0->rmac_pause_cfg);
5030         if (val64 != 0xc000ffff00000000ULL) {
5031                 fail = 1;
5032                 DBG_PRINT(INFO_DBG, "Read Test level 2 fails\n");
5033         }
5034
5035         val64 = readq(&bar0->rx_queue_cfg);
5036         if (sp->device_type == XFRAME_II_DEVICE)
5037                 exp_val = 0x0404040404040404ULL;
5038         else
5039                 exp_val = 0x0808080808080808ULL;
5040         if (val64 != exp_val) {
5041                 fail = 1;
5042                 DBG_PRINT(INFO_DBG, "Read Test level 3 fails\n");
5043         }
5044
5045         val64 = readq(&bar0->xgxs_efifo_cfg);
5046         if (val64 != 0x000000001923141EULL) {
5047                 fail = 1;
5048                 DBG_PRINT(INFO_DBG, "Read Test level 4 fails\n");
5049         }
5050
5051         val64 = 0x5A5A5A5A5A5A5A5AULL;
5052         writeq(val64, &bar0->xmsi_data);
5053         val64 = readq(&bar0->xmsi_data);
5054         if (val64 != 0x5A5A5A5A5A5A5A5AULL) {
5055                 fail = 1;
5056                 DBG_PRINT(ERR_DBG, "Write Test level 1 fails\n");
5057         }
5058
5059         val64 = 0xA5A5A5A5A5A5A5A5ULL;
5060         writeq(val64, &bar0->xmsi_data);
5061         val64 = readq(&bar0->xmsi_data);
5062         if (val64 != 0xA5A5A5A5A5A5A5A5ULL) {
5063                 fail = 1;
5064                 DBG_PRINT(ERR_DBG, "Write Test level 2 fails\n");
5065         }
5066
5067         *data = fail;
5068         return fail;
5069 }
5070
5071 /**
5072  * s2io_eeprom_test - to verify that EEprom in the xena can be programmed.
5073  * @sp : private member of the device structure, which is a pointer to the
5074  * s2io_nic structure.
5075  * @data:variable that returns the result of each of the test conducted by
5076  * the driver.
5077  * Description:
5078  * Verify that EEPROM in the xena can be programmed using I2C_CONTROL
5079  * register.
5080  * Return value:
5081  * 0 on success.
5082  */
5083
5084 static int s2io_eeprom_test(struct s2io_nic * sp, uint64_t * data)
5085 {
5086         int fail = 0;
5087         u64 ret_data, org_4F0, org_7F0;
5088         u8 saved_4F0 = 0, saved_7F0 = 0;
5089         struct net_device *dev = sp->dev;
5090
5091         /* Test Write Error at offset 0 */
5092         /* Note that SPI interface allows write access to all areas
5093          * of EEPROM. Hence doing all negative testing only for Xframe I.
5094          */
5095         if (sp->device_type == XFRAME_I_DEVICE)
5096                 if (!write_eeprom(sp, 0, 0, 3))
5097                         fail = 1;
5098
5099         /* Save current values at offsets 0x4F0 and 0x7F0 */
5100         if (!read_eeprom(sp, 0x4F0, &org_4F0))
5101                 saved_4F0 = 1;
5102         if (!read_eeprom(sp, 0x7F0, &org_7F0))
5103                 saved_7F0 = 1;
5104
5105         /* Test Write at offset 4f0 */
5106         if (write_eeprom(sp, 0x4F0, 0x012345, 3))
5107                 fail = 1;
5108         if (read_eeprom(sp, 0x4F0, &ret_data))
5109                 fail = 1;
5110
5111         if (ret_data != 0x012345) {
5112                 DBG_PRINT(ERR_DBG, "%s: eeprom test error at offset 0x4F0. "
5113                         "Data written %llx Data read %llx\n",
5114                         dev->name, (unsigned long long)0x12345,
5115                         (unsigned long long)ret_data);
5116                 fail = 1;
5117         }
5118
5119         /* Reset the EEPROM data go FFFF */
5120         write_eeprom(sp, 0x4F0, 0xFFFFFF, 3);
5121
5122         /* Test Write Request Error at offset 0x7c */
5123         if (sp->device_type == XFRAME_I_DEVICE)
5124                 if (!write_eeprom(sp, 0x07C, 0, 3))
5125                         fail = 1;
5126
5127         /* Test Write Request at offset 0x7f0 */
5128         if (write_eeprom(sp, 0x7F0, 0x012345, 3))
5129                 fail = 1;
5130         if (read_eeprom(sp, 0x7F0, &ret_data))
5131                 fail = 1;
5132
5133         if (ret_data != 0x012345) {
5134                 DBG_PRINT(ERR_DBG, "%s: eeprom test error at offset 0x7F0. "
5135                         "Data written %llx Data read %llx\n",
5136                         dev->name, (unsigned long long)0x12345,
5137                         (unsigned long long)ret_data);
5138                 fail = 1;
5139         }
5140
5141         /* Reset the EEPROM data go FFFF */
5142         write_eeprom(sp, 0x7F0, 0xFFFFFF, 3);
5143
5144         if (sp->device_type == XFRAME_I_DEVICE) {
5145                 /* Test Write Error at offset 0x80 */
5146                 if (!write_eeprom(sp, 0x080, 0, 3))
5147                         fail = 1;
5148
5149                 /* Test Write Error at offset 0xfc */
5150                 if (!write_eeprom(sp, 0x0FC, 0, 3))
5151                         fail = 1;
5152
5153                 /* Test Write Error at offset 0x100 */
5154                 if (!write_eeprom(sp, 0x100, 0, 3))
5155                         fail = 1;
5156
5157                 /* Test Write Error at offset 4ec */
5158                 if (!write_eeprom(sp, 0x4EC, 0, 3))
5159                         fail = 1;
5160         }
5161
5162         /* Restore values at offsets 0x4F0 and 0x7F0 */
5163         if (saved_4F0)
5164                 write_eeprom(sp, 0x4F0, org_4F0, 3);
5165         if (saved_7F0)
5166                 write_eeprom(sp, 0x7F0, org_7F0, 3);
5167
5168         *data = fail;
5169         return fail;
5170 }
5171
5172 /**
5173  * s2io_bist_test - invokes the MemBist test of the card .
5174  * @sp : private member of the device structure, which is a pointer to the
5175  * s2io_nic structure.
5176  * @data:variable that returns the result of each of the test conducted by
5177  * the driver.
5178  * Description:
5179  * This invokes the MemBist test of the card. We give around
5180  * 2 secs time for the Test to complete. If it's still not complete
5181  * within this peiod, we consider that the test failed.
5182  * Return value:
5183  * 0 on success and -1 on failure.
5184  */
5185
5186 static int s2io_bist_test(struct s2io_nic * sp, uint64_t * data)
5187 {
5188         u8 bist = 0;
5189         int cnt = 0, ret = -1;
5190
5191         pci_read_config_byte(sp->pdev, PCI_BIST, &bist);
5192         bist |= PCI_BIST_START;
5193         pci_write_config_word(sp->pdev, PCI_BIST, bist);
5194
5195         while (cnt < 20) {
5196                 pci_read_config_byte(sp->pdev, PCI_BIST, &bist);
5197                 if (!(bist & PCI_BIST_START)) {
5198                         *data = (bist & PCI_BIST_CODE_MASK);
5199                         ret = 0;
5200                         break;
5201                 }
5202                 msleep(100);
5203                 cnt++;
5204         }
5205
5206         return ret;
5207 }
5208
5209 /**
5210  * s2io-link_test - verifies the link state of the nic
5211  * @sp ; private member of the device structure, which is a pointer to the
5212  * s2io_nic structure.
5213  * @data: variable that returns the result of each of the test conducted by
5214  * the driver.
5215  * Description:
5216  * The function verifies the link state of the NIC and updates the input
5217  * argument 'data' appropriately.
5218  * Return value:
5219  * 0 on success.
5220  */
5221
5222 static int s2io_link_test(struct s2io_nic * sp, uint64_t * data)
5223 {
5224         struct XENA_dev_config __iomem *bar0 = sp->bar0;
5225         u64 val64;
5226
5227         val64 = readq(&bar0->adapter_status);
5228         if(!(LINK_IS_UP(val64)))
5229                 *data = 1;
5230         else
5231                 *data = 0;
5232
5233         return *data;
5234 }
5235
5236 /**
5237  * s2io_rldram_test - offline test for access to the RldRam chip on the NIC
5238  * @sp - private member of the device structure, which is a pointer to the
5239  * s2io_nic structure.
5240  * @data - variable that returns the result of each of the test
5241  * conducted by the driver.
5242  * Description:
5243  *  This is one of the offline test that tests the read and write
5244  *  access to the RldRam chip on the NIC.
5245  * Return value:
5246  *  0 on success.
5247  */
5248
5249 static int s2io_rldram_test(struct s2io_nic * sp, uint64_t * data)
5250 {
5251         struct XENA_dev_config __iomem *bar0 = sp->bar0;
5252         u64 val64;
5253         int cnt, iteration = 0, test_fail = 0;
5254
5255         val64 = readq(&bar0->adapter_control);
5256         val64 &= ~ADAPTER_ECC_EN;
5257         writeq(val64, &bar0->adapter_control);
5258
5259         val64 = readq(&bar0->mc_rldram_test_ctrl);
5260         val64 |= MC_RLDRAM_TEST_MODE;
5261         SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_test_ctrl, LF);
5262
5263         val64 = readq(&bar0->mc_rldram_mrs);
5264         val64 |= MC_RLDRAM_QUEUE_SIZE_ENABLE;
5265         SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_mrs, UF);
5266
5267         val64 |= MC_RLDRAM_MRS_ENABLE;
5268         SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_mrs, UF);
5269
5270         while (iteration < 2) {
5271                 val64 = 0x55555555aaaa0000ULL;
5272                 if (iteration == 1) {
5273                         val64 ^= 0xFFFFFFFFFFFF0000ULL;
5274                 }
5275                 writeq(val64, &bar0->mc_rldram_test_d0);
5276
5277                 val64 = 0xaaaa5a5555550000ULL;
5278                 if (iteration == 1) {
5279                         val64 ^= 0xFFFFFFFFFFFF0000ULL;
5280                 }
5281                 writeq(val64, &bar0->mc_rldram_test_d1);
5282
5283                 val64 = 0x55aaaaaaaa5a0000ULL;
5284                 if (iteration == 1) {
5285                         val64 ^= 0xFFFFFFFFFFFF0000ULL;
5286                 }
5287                 writeq(val64, &bar0->mc_rldram_test_d2);
5288
5289                 val64 = (u64) (0x0000003ffffe0100ULL);
5290                 writeq(val64, &bar0->mc_rldram_test_add);
5291
5292                 val64 = MC_RLDRAM_TEST_MODE | MC_RLDRAM_TEST_WRITE |
5293                         MC_RLDRAM_TEST_GO;
5294                 SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_test_ctrl, LF);
5295
5296                 for (cnt = 0; cnt < 5; cnt++) {
5297                         val64 = readq(&bar0->mc_rldram_test_ctrl);
5298                         if (val64 & MC_RLDRAM_TEST_DONE)
5299                                 break;
5300                         msleep(200);
5301                 }
5302
5303                 if (cnt == 5)
5304                         break;
5305
5306                 val64 = MC_RLDRAM_TEST_MODE | MC_RLDRAM_TEST_GO;
5307                 SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_test_ctrl, LF);
5308
5309                 for (cnt = 0; cnt < 5; cnt++) {
5310                         val64 = readq(&bar0->mc_rldram_test_ctrl);
5311                         if (val64 & MC_RLDRAM_TEST_DONE)
5312                                 break;
5313                         msleep(500);
5314                 }
5315
5316                 if (cnt == 5)
5317                         break;
5318
5319                 val64 = readq(&bar0->mc_rldram_test_ctrl);
5320                 if (!(val64 & MC_RLDRAM_TEST_PASS))
5321                         test_fail = 1;
5322
5323                 iteration++;
5324         }
5325
5326         *data = test_fail;
5327
5328         /* Bring the adapter out of test mode */
5329         SPECIAL_REG_WRITE(0, &bar0->mc_rldram_test_ctrl, LF);
5330
5331         return test_fail;
5332 }
5333
5334 /**
5335  *  s2io_ethtool_test - conducts 6 tsets to determine the health of card.
5336  *  @sp : private member of the device structure, which is a pointer to the
5337  *  s2io_nic structure.
5338  *  @ethtest : pointer to a ethtool command specific structure that will be
5339  *  returned to the user.
5340  *  @data : variable that returns the result of each of the test
5341  * conducted by the driver.
5342  * Description:
5343  *  This function conducts 6 tests ( 4 offline and 2 online) to determine
5344  *  the health of the card.
5345  * Return value:
5346  *  void
5347  */
5348
5349 static void s2io_ethtool_test(struct net_device *dev,
5350                               struct ethtool_test *ethtest,
5351                               uint64_t * data)
5352 {
5353         struct s2io_nic *sp = dev->priv;
5354         int orig_state = netif_running(sp->dev);
5355
5356         if (ethtest->flags == ETH_TEST_FL_OFFLINE) {
5357                 /* Offline Tests. */
5358                 if (orig_state)
5359                         s2io_close(sp->dev);
5360
5361                 if (s2io_register_test(sp, &data[0]))
5362                         ethtest->flags |= ETH_TEST_FL_FAILED;
5363
5364                 s2io_reset(sp);
5365
5366                 if (s2io_rldram_test(sp, &data[3]))
5367                         ethtest->flags |= ETH_TEST_FL_FAILED;
5368
5369                 s2io_reset(sp);
5370
5371                 if (s2io_eeprom_test(sp, &data[1]))
5372                         ethtest->flags |= ETH_TEST_FL_FAILED;
5373
5374                 if (s2io_bist_test(sp, &data[4]))
5375                         ethtest->flags |= ETH_TEST_FL_FAILED;
5376
5377                 if (orig_state)
5378                         s2io_open(sp->dev);
5379
5380                 data[2] = 0;
5381         } else {
5382                 /* Online Tests. */
5383                 if (!orig_state) {
5384                         DBG_PRINT(ERR_DBG,
5385                                   "%s: is not up, cannot run test\n",
5386                                   dev->name);
5387                         data[0] = -1;
5388                         data[1] = -1;
5389                         data[2] = -1;
5390                         data[3] = -1;
5391                         data[4] = -1;
5392                 }
5393
5394                 if (s2io_link_test(sp, &data[2]))
5395                         ethtest->flags |= ETH_TEST_FL_FAILED;
5396
5397                 data[0] = 0;
5398                 data[1] = 0;
5399                 data[3] = 0;
5400                 data[4] = 0;
5401         }
5402 }
5403
5404 static void s2io_get_ethtool_stats(struct net_device *dev,
5405                                    struct ethtool_stats *estats,
5406                                    u64 * tmp_stats)
5407 {
5408         int i = 0;
5409         struct s2io_nic *sp = dev->priv;
5410         struct stat_block *stat_info = sp->mac_control.stats_info;
5411
5412         s2io_updt_stats(sp);
5413         tmp_stats[i++] =
5414                 (u64)le32_to_cpu(stat_info->tmac_frms_oflow) << 32  |
5415                 le32_to_cpu(stat_info->tmac_frms);
5416         tmp_stats[i++] =
5417                 (u64)le32_to_cpu(stat_info->tmac_data_octets_oflow) << 32 |
5418                 le32_to_cpu(stat_info->tmac_data_octets);
5419         tmp_stats[i++] = le64_to_cpu(stat_info->tmac_drop_frms);
5420         tmp_stats[i++] =
5421                 (u64)le32_to_cpu(stat_info->tmac_mcst_frms_oflow) << 32 |
5422                 le32_to_cpu(stat_info->tmac_mcst_frms);
5423         tmp_stats[i++] =
5424                 (u64)le32_to_cpu(stat_info->tmac_bcst_frms_oflow) << 32 |
5425                 le32_to_cpu(stat_info->tmac_bcst_frms);
5426         tmp_stats[i++] = le64_to_cpu(stat_info->tmac_pause_ctrl_frms);
5427         tmp_stats[i++] =
5428                 (u64)le32_to_cpu(stat_info->tmac_ttl_octets_oflow) << 32 |
5429                 le32_to_cpu(stat_info->tmac_ttl_octets);
5430         tmp_stats[i++] =
5431                 (u64)le32_to_cpu(stat_info->tmac_ucst_frms_oflow) << 32 |
5432                 le32_to_cpu(stat_info->tmac_ucst_frms);
5433         tmp_stats[i++] =
5434                 (u64)le32_to_cpu(stat_info->tmac_nucst_frms_oflow) << 32 |
5435                 le32_to_cpu(stat_info->tmac_nucst_frms);
5436         tmp_stats[i++] =
5437                 (u64)le32_to_cpu(stat_info->tmac_any_err_frms_oflow) << 32 |
5438                 le32_to_cpu(stat_info->tmac_any_err_frms);
5439         tmp_stats[i++] = le64_to_cpu(stat_info->tmac_ttl_less_fb_octets);
5440         tmp_stats[i++] = le64_to_cpu(stat_info->tmac_vld_ip_octets);
5441         tmp_stats[i++] =
5442                 (u64)le32_to_cpu(stat_info->tmac_vld_ip_oflow) << 32 |
5443                 le32_to_cpu(stat_info->tmac_vld_ip);
5444         tmp_stats[i++] =
5445                 (u64)le32_to_cpu(stat_info->tmac_drop_ip_oflow) << 32 |
5446                 le32_to_cpu(stat_info->tmac_drop_ip);
5447         tmp_stats[i++] =
5448                 (u64)le32_to_cpu(stat_info->tmac_icmp_oflow) << 32 |
5449                 le32_to_cpu(stat_info->tmac_icmp);
5450         tmp_stats[i++] =
5451                 (u64)le32_to_cpu(stat_info->tmac_rst_tcp_oflow) << 32 |
5452                 le32_to_cpu(stat_info->tmac_rst_tcp);
5453         tmp_stats[i++] = le64_to_cpu(stat_info->tmac_tcp);
5454         tmp_stats[i++] = (u64)le32_to_cpu(stat_info->tmac_udp_oflow) << 32 |
5455                 le32_to_cpu(stat_info->tmac_udp);
5456         tmp_stats[i++] =
5457                 (u64)le32_to_cpu(stat_info->rmac_vld_frms_oflow) << 32 |
5458                 le32_to_cpu(stat_info->rmac_vld_frms);
5459         tmp_stats[i++] =
5460                 (u64)le32_to_cpu(stat_info->rmac_data_octets_oflow) << 32 |
5461                 le32_to_cpu(stat_info->rmac_data_octets);
5462         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_fcs_err_frms);
5463         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_drop_frms);
5464         tmp_stats[i++] =
5465                 (u64)le32_to_cpu(stat_info->rmac_vld_mcst_frms_oflow) << 32 |
5466                 le32_to_cpu(stat_info->rmac_vld_mcst_frms);
5467         tmp_stats[i++] =
5468                 (u64)le32_to_cpu(stat_info->rmac_vld_bcst_frms_oflow) << 32 |
5469                 le32_to_cpu(stat_info->rmac_vld_bcst_frms);
5470         tmp_stats[i++] = le32_to_cpu(stat_info->rmac_in_rng_len_err_frms);
5471         tmp_stats[i++] = le32_to_cpu(stat_info->rmac_out_rng_len_err_frms);
5472         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_long_frms);
5473         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_pause_ctrl_frms);
5474         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_unsup_ctrl_frms);
5475         tmp_stats[i++] =
5476                 (u64)le32_to_cpu(stat_info->rmac_ttl_octets_oflow) << 32 |
5477                 le32_to_cpu(stat_info->rmac_ttl_octets);
5478         tmp_stats[i++] =
5479                 (u64)le32_to_cpu(stat_info->rmac_accepted_ucst_frms_oflow)
5480                 << 32 | le32_to_cpu(stat_info->rmac_accepted_ucst_frms);
5481         tmp_stats[i++] =
5482                 (u64)le32_to_cpu(stat_info->rmac_accepted_nucst_frms_oflow)
5483                  << 32 | le32_to_cpu(stat_info->rmac_accepted_nucst_frms);
5484         tmp_stats[i++] =
5485                 (u64)le32_to_cpu(stat_info->rmac_discarded_frms_oflow) << 32 |
5486                 le32_to_cpu(stat_info->rmac_discarded_frms);
5487         tmp_stats[i++] =
5488                 (u64)le32_to_cpu(stat_info->rmac_drop_events_oflow)
5489                  << 32 | le32_to_cpu(stat_info->rmac_drop_events);
5490         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_less_fb_octets);
5491         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_frms);
5492         tmp_stats[i++] =
5493                 (u64)le32_to_cpu(stat_info->rmac_usized_frms_oflow) << 32 |
5494                 le32_to_cpu(stat_info->rmac_usized_frms);
5495         tmp_stats[i++] =
5496                 (u64)le32_to_cpu(stat_info->rmac_osized_frms_oflow) << 32 |
5497                 le32_to_cpu(stat_info->rmac_osized_frms);
5498         tmp_stats[i++] =
5499                 (u64)le32_to_cpu(stat_info->rmac_frag_frms_oflow) << 32 |
5500                 le32_to_cpu(stat_info->rmac_frag_frms);
5501         tmp_stats[i++] =
5502                 (u64)le32_to_cpu(stat_info->rmac_jabber_frms_oflow) << 32 |
5503                 le32_to_cpu(stat_info->rmac_jabber_frms);
5504         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_64_frms);
5505         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_65_127_frms);
5506         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_128_255_frms);
5507         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_256_511_frms);
5508         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_512_1023_frms);
5509         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_1024_1518_frms);
5510         tmp_stats[i++] =
5511                 (u64)le32_to_cpu(stat_info->rmac_ip_oflow) << 32 |
5512                 le32_to_cpu(stat_info->rmac_ip);
5513         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ip_octets);
5514         tmp_stats[i++] = le32_to_cpu(stat_info->rmac_hdr_err_ip);
5515         tmp_stats[i++] =
5516                 (u64)le32_to_cpu(stat_info->rmac_drop_ip_oflow) << 32 |
5517                 le32_to_cpu(stat_info->rmac_drop_ip);
5518         tmp_stats[i++] =
5519                 (u64)le32_to_cpu(stat_info->rmac_icmp_oflow) << 32 |
5520                 le32_to_cpu(stat_info->rmac_icmp);
5521         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_tcp);
5522         tmp_stats[i++] =
5523                 (u64)le32_to_cpu(stat_info->rmac_udp_oflow) << 32 |
5524                 le32_to_cpu(stat_info->rmac_udp);
5525         tmp_stats[i++] =
5526                 (u64)le32_to_cpu(stat_info->rmac_err_drp_udp_oflow) << 32 |
5527                 le32_to_cpu(stat_info->rmac_err_drp_udp);
5528         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_xgmii_err_sym);
5529         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_frms_q0);
5530         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_frms_q1);
5531         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_frms_q2);
5532         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_frms_q3);
5533         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_frms_q4);
5534         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_frms_q5);
5535         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_frms_q6);
5536         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_frms_q7);
5537         tmp_stats[i++] = le16_to_cpu(stat_info->rmac_full_q0);
5538         tmp_stats[i++] = le16_to_cpu(stat_info->rmac_full_q1);
5539         tmp_stats[i++] = le16_to_cpu(stat_info->rmac_full_q2);
5540         tmp_stats[i++] = le16_to_cpu(stat_info->rmac_full_q3);
5541         tmp_stats[i++] = le16_to_cpu(stat_info->rmac_full_q4);
5542         tmp_stats[i++] = le16_to_cpu(stat_info->rmac_full_q5);
5543         tmp_stats[i++] = le16_to_cpu(stat_info->rmac_full_q6);
5544         tmp_stats[i++] = le16_to_cpu(stat_info->rmac_full_q7);
5545         tmp_stats[i++] =
5546                 (u64)le32_to_cpu(stat_info->rmac_pause_cnt_oflow) << 32 |
5547                 le32_to_cpu(stat_info->rmac_pause_cnt);
5548         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_xgmii_data_err_cnt);
5549         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_xgmii_ctrl_err_cnt);
5550         tmp_stats[i++] =
5551                 (u64)le32_to_cpu(stat_info->rmac_accepted_ip_oflow) << 32 |
5552                 le32_to_cpu(stat_info->rmac_accepted_ip);
5553         tmp_stats[i++] = le32_to_cpu(stat_info->rmac_err_tcp);
5554         tmp_stats[i++] = le32_to_cpu(stat_info->rd_req_cnt);
5555         tmp_stats[i++] = le32_to_cpu(stat_info->new_rd_req_cnt);
5556         tmp_stats[i++] = le32_to_cpu(stat_info->new_rd_req_rtry_cnt);
5557         tmp_stats[i++] = le32_to_cpu(stat_info->rd_rtry_cnt);
5558         tmp_stats[i++] = le32_to_cpu(stat_info->wr_rtry_rd_ack_cnt);
5559         tmp_stats[i++] = le32_to_cpu(stat_info->wr_req_cnt);
5560         tmp_stats[i++] = le32_to_cpu(stat_info->new_wr_req_cnt);
5561         tmp_stats[i++] = le32_to_cpu(stat_info->new_wr_req_rtry_cnt);
5562         tmp_stats[i++] = le32_to_cpu(stat_info->wr_rtry_cnt);
5563         tmp_stats[i++] = le32_to_cpu(stat_info->wr_disc_cnt);
5564         tmp_stats[i++] = le32_to_cpu(stat_info->rd_rtry_wr_ack_cnt);
5565         tmp_stats[i++] = le32_to_cpu(stat_info->txp_wr_cnt);
5566         tmp_stats[i++] = le32_to_cpu(stat_info->txd_rd_cnt);
5567         tmp_stats[i++] = le32_to_cpu(stat_info->txd_wr_cnt);
5568         tmp_stats[i++] = le32_to_cpu(stat_info->rxd_rd_cnt);
5569         tmp_stats[i++] = le32_to_cpu(stat_info->rxd_wr_cnt);
5570         tmp_stats[i++] = le32_to_cpu(stat_info->txf_rd_cnt);
5571         tmp_stats[i++] = le32_to_cpu(stat_info->rxf_wr_cnt);
5572         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_1519_4095_frms);
5573         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_4096_8191_frms);
5574         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_8192_max_frms);
5575         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_gt_max_frms);
5576         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_osized_alt_frms);
5577         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_jabber_alt_frms);
5578         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_gt_max_alt_frms);
5579         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_vlan_frms);
5580         tmp_stats[i++] = le32_to_cpu(stat_info->rmac_len_discard);
5581         tmp_stats[i++] = le32_to_cpu(stat_info->rmac_fcs_discard);
5582         tmp_stats[i++] = le32_to_cpu(stat_info->rmac_pf_discard);
5583         tmp_stats[i++] = le32_to_cpu(stat_info->rmac_da_discard);
5584         tmp_stats[i++] = le32_to_cpu(stat_info->rmac_red_discard);
5585         tmp_stats[i++] = le32_to_cpu(stat_info->rmac_rts_discard);
5586         tmp_stats[i++] = le32_to_cpu(stat_info->rmac_ingm_full_discard);
5587         tmp_stats[i++] = le32_to_cpu(stat_info->link_fault_cnt);
5588         tmp_stats[i++] = 0;
5589         tmp_stats[i++] = stat_info->sw_stat.single_ecc_errs;
5590         tmp_stats[i++] = stat_info->sw_stat.double_ecc_errs;
5591         tmp_stats[i++] = stat_info->sw_stat.parity_err_cnt;
5592         tmp_stats[i++] = stat_info->sw_stat.serious_err_cnt;
5593         tmp_stats[i++] = stat_info->sw_stat.soft_reset_cnt;
5594         tmp_stats[i++] = stat_info->sw_stat.fifo_full_cnt;
5595         tmp_stats[i++] = stat_info->sw_stat.ring_full_cnt;
5596         tmp_stats[i++] = stat_info->xpak_stat.alarm_transceiver_temp_high;
5597         tmp_stats[i++] = stat_info->xpak_stat.alarm_transceiver_temp_low;
5598         tmp_stats[i++] = stat_info->xpak_stat.alarm_laser_bias_current_high;
5599         tmp_stats[i++] = stat_info->xpak_stat.alarm_laser_bias_current_low;
5600         tmp_stats[i++] = stat_info->xpak_stat.alarm_laser_output_power_high;
5601         tmp_stats[i++] = stat_info->xpak_stat.alarm_laser_output_power_low;
5602         tmp_stats[i++] = stat_info->xpak_stat.warn_transceiver_temp_high;
5603         tmp_stats[i++] = stat_info->xpak_stat.warn_transceiver_temp_low;
5604         tmp_stats[i++] = stat_info->xpak_stat.warn_laser_bias_current_high;
5605         tmp_stats[i++] = stat_info->xpak_stat.warn_laser_bias_current_low;
5606         tmp_stats[i++] = stat_info->xpak_stat.warn_laser_output_power_high;
5607         tmp_stats[i++] = stat_info->xpak_stat.warn_laser_output_power_low;
5608         tmp_stats[i++] = stat_info->sw_stat.clubbed_frms_cnt;
5609         tmp_stats[i++] = stat_info->sw_stat.sending_both;
5610         tmp_stats[i++] = stat_info->sw_stat.outof_sequence_pkts;
5611         tmp_stats[i++] = stat_info->sw_stat.flush_max_pkts;
5612         if (stat_info->sw_stat.num_aggregations) {
5613                 u64 tmp = stat_info->sw_stat.sum_avg_pkts_aggregated;
5614                 int count = 0;
5615                 /*
5616                  * Since 64-bit divide does not work on all platforms,
5617                  * do repeated subtraction.
5618                  */
5619                 while (tmp >= stat_info->sw_stat.num_aggregations) {
5620                         tmp -= stat_info->sw_stat.num_aggregations;
5621                         count++;
5622                 }
5623                 tmp_stats[i++] = count;
5624         }
5625         else
5626                 tmp_stats[i++] = 0;
5627 }
5628
5629 static int s2io_ethtool_get_regs_len(struct net_device *dev)
5630 {
5631         return (XENA_REG_SPACE);
5632 }
5633
5634
5635 static u32 s2io_ethtool_get_rx_csum(struct net_device * dev)
5636 {
5637         struct s2io_nic *sp = dev->priv;
5638
5639         return (sp->rx_csum);
5640 }
5641
5642 static int s2io_ethtool_set_rx_csum(struct net_device *dev, u32 data)
5643 {
5644         struct s2io_nic *sp = dev->priv;
5645
5646         if (data)
5647                 sp->rx_csum = 1;
5648         else
5649                 sp->rx_csum = 0;
5650
5651         return 0;
5652 }
5653
5654 static int s2io_get_eeprom_len(struct net_device *dev)
5655 {
5656         return (XENA_EEPROM_SPACE);
5657 }
5658
5659 static int s2io_ethtool_self_test_count(struct net_device *dev)
5660 {
5661         return (S2IO_TEST_LEN);
5662 }
5663
5664 static void s2io_ethtool_get_strings(struct net_device *dev,
5665                                      u32 stringset, u8 * data)
5666 {
5667         switch (stringset) {
5668         case ETH_SS_TEST:
5669                 memcpy(data, s2io_gstrings, S2IO_STRINGS_LEN);
5670                 break;
5671         case ETH_SS_STATS:
5672                 memcpy(data, &ethtool_stats_keys,
5673                        sizeof(ethtool_stats_keys));
5674         }
5675 }
5676 static int s2io_ethtool_get_stats_count(struct net_device *dev)
5677 {
5678         return (S2IO_STAT_LEN);
5679 }
5680
5681 static int s2io_ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
5682 {
5683         if (data)
5684                 dev->features |= NETIF_F_IP_CSUM;
5685         else
5686                 dev->features &= ~NETIF_F_IP_CSUM;
5687
5688         return 0;
5689 }
5690
5691 static u32 s2io_ethtool_op_get_tso(struct net_device *dev)
5692 {
5693         return (dev->features & NETIF_F_TSO) != 0;
5694 }
5695 static int s2io_ethtool_op_set_tso(struct net_device *dev, u32 data)
5696 {
5697         if (data)
5698                 dev->features |= (NETIF_F_TSO | NETIF_F_TSO6);
5699         else
5700                 dev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
5701
5702         return 0;
5703 }
5704
5705 static const struct ethtool_ops netdev_ethtool_ops = {
5706         .get_settings = s2io_ethtool_gset,
5707         .set_settings = s2io_ethtool_sset,
5708         .get_drvinfo = s2io_ethtool_gdrvinfo,
5709         .get_regs_len = s2io_ethtool_get_regs_len,
5710         .get_regs = s2io_ethtool_gregs,
5711         .get_link = ethtool_op_get_link,
5712         .get_eeprom_len = s2io_get_eeprom_len,
5713         .get_eeprom = s2io_ethtool_geeprom,
5714         .set_eeprom = s2io_ethtool_seeprom,
5715         .get_pauseparam = s2io_ethtool_getpause_data,
5716         .set_pauseparam = s2io_ethtool_setpause_data,
5717         .get_rx_csum = s2io_ethtool_get_rx_csum,
5718         .set_rx_csum = s2io_ethtool_set_rx_csum,
5719         .get_tx_csum = ethtool_op_get_tx_csum,
5720         .set_tx_csum = s2io_ethtool_op_set_tx_csum,
5721         .get_sg = ethtool_op_get_sg,
5722         .set_sg = ethtool_op_set_sg,
5723         .get_tso = s2io_ethtool_op_get_tso,
5724         .set_tso = s2io_ethtool_op_set_tso,
5725         .get_ufo = ethtool_op_get_ufo,
5726         .set_ufo = ethtool_op_set_ufo,
5727         .self_test_count = s2io_ethtool_self_test_count,
5728         .self_test = s2io_ethtool_test,
5729         .get_strings = s2io_ethtool_get_strings,
5730         .phys_id = s2io_ethtool_idnic,
5731         .get_stats_count = s2io_ethtool_get_stats_count,
5732         .get_ethtool_stats = s2io_get_ethtool_stats
5733 };
5734
5735 /**
5736  *  s2io_ioctl - Entry point for the Ioctl
5737  *  @dev :  Device pointer.
5738  *  @ifr :  An IOCTL specefic structure, that can contain a pointer to
5739  *  a proprietary structure used to pass information to the driver.
5740  *  @cmd :  This is used to distinguish between the different commands that
5741  *  can be passed to the IOCTL functions.
5742  *  Description:
5743  *  Currently there are no special functionality supported in IOCTL, hence
5744  *  function always return EOPNOTSUPPORTED
5745  */
5746
5747 static int s2io_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5748 {
5749         return -EOPNOTSUPP;
5750 }
5751
5752 /**
5753  *  s2io_change_mtu - entry point to change MTU size for the device.
5754  *   @dev : device pointer.
5755  *   @new_mtu : the new MTU size for the device.
5756  *   Description: A driver entry point to change MTU size for the device.
5757  *   Before changing the MTU the device must be stopped.
5758  *  Return value:
5759  *   0 on success and an appropriate (-)ve integer as defined in errno.h
5760  *   file on failure.
5761  */
5762
5763 static int s2io_change_mtu(struct net_device *dev, int new_mtu)
5764 {
5765         struct s2io_nic *sp = dev->priv;
5766
5767         if ((new_mtu < MIN_MTU) || (new_mtu > S2IO_JUMBO_SIZE)) {
5768                 DBG_PRINT(ERR_DBG, "%s: MTU size is invalid.\n",
5769                           dev->name);
5770                 return -EPERM;
5771         }
5772
5773         dev->mtu = new_mtu;
5774         if (netif_running(dev)) {
5775                 s2io_card_down(sp);
5776                 netif_stop_queue(dev);
5777                 if (s2io_card_up(sp)) {
5778                         DBG_PRINT(ERR_DBG, "%s: Device bring up failed\n",
5779                                   __FUNCTION__);
5780                 }
5781                 if (netif_queue_stopped(dev))
5782                         netif_wake_queue(dev);
5783         } else { /* Device is down */
5784                 struct XENA_dev_config __iomem *bar0 = sp->bar0;
5785                 u64 val64 = new_mtu;
5786
5787                 writeq(vBIT(val64, 2, 14), &bar0->rmac_max_pyld_len);
5788         }
5789
5790         return 0;
5791 }
5792
5793 /**
5794  *  s2io_tasklet - Bottom half of the ISR.
5795  *  @dev_adr : address of the device structure in dma_addr_t format.
5796  *  Description:
5797  *  This is the tasklet or the bottom half of the ISR. This is
5798  *  an extension of the ISR which is scheduled by the scheduler to be run
5799  *  when the load on the CPU is low. All low priority tasks of the ISR can
5800  *  be pushed into the tasklet. For now the tasklet is used only to
5801  *  replenish the Rx buffers in the Rx buffer descriptors.
5802  *  Return value:
5803  *  void.
5804  */
5805
5806 static void s2io_tasklet(unsigned long dev_addr)
5807 {
5808         struct net_device *dev = (struct net_device *) dev_addr;
5809         struct s2io_nic *sp = dev->priv;
5810         int i, ret;
5811         struct mac_info *mac_control;
5812         struct config_param *config;
5813
5814         mac_control = &sp->mac_control;
5815         config = &sp->config;
5816
5817         if (!TASKLET_IN_USE) {
5818                 for (i = 0; i < config->rx_ring_num; i++) {
5819                         ret = fill_rx_buffers(sp, i);
5820                         if (ret == -ENOMEM) {
5821                                 DBG_PRINT(ERR_DBG, "%s: Out of ",
5822                                           dev->name);
5823                                 DBG_PRINT(ERR_DBG, "memory in tasklet\n");
5824                                 break;
5825                         } else if (ret == -EFILL) {
5826                                 DBG_PRINT(ERR_DBG,
5827                                           "%s: Rx Ring %d is full\n",
5828                                           dev->name, i);
5829                                 break;
5830                         }
5831                 }
5832                 clear_bit(0, (&sp->tasklet_status));
5833         }
5834 }
5835
5836 /**
5837  * s2io_set_link - Set the LInk status
5838  * @data: long pointer to device private structue
5839  * Description: Sets the link status for the adapter
5840  */
5841
5842 static void s2io_set_link(struct work_struct *work)
5843 {
5844         struct s2io_nic *nic = container_of(work, struct s2io_nic, set_link_task);
5845         struct net_device *dev = nic->dev;
5846         struct XENA_dev_config __iomem *bar0 = nic->bar0;
5847         register u64 val64;
5848         u16 subid;
5849
5850         if (test_and_set_bit(0, &(nic->link_state))) {
5851                 /* The card is being reset, no point doing anything */
5852                 return;
5853         }
5854
5855         subid = nic->pdev->subsystem_device;
5856         if (s2io_link_fault_indication(nic) == MAC_RMAC_ERR_TIMER) {
5857                 /*
5858                  * Allow a small delay for the NICs self initiated
5859                  * cleanup to complete.
5860                  */
5861                 msleep(100);
5862         }
5863
5864         val64 = readq(&bar0->adapter_status);
5865         if (LINK_IS_UP(val64)) {
5866                 if (!(readq(&bar0->adapter_control) & ADAPTER_CNTL_EN)) {
5867                         if (verify_xena_quiescence(nic)) {
5868                                 val64 = readq(&bar0->adapter_control);
5869                                 val64 |= ADAPTER_CNTL_EN;
5870                                 writeq(val64, &bar0->adapter_control);
5871                                 if (CARDS_WITH_FAULTY_LINK_INDICATORS(
5872                                         nic->device_type, subid)) {
5873                                         val64 = readq(&bar0->gpio_control);
5874                                         val64 |= GPIO_CTRL_GPIO_0;
5875                                         writeq(val64, &bar0->gpio_control);
5876                                         val64 = readq(&bar0->gpio_control);
5877                                 } else {
5878                                         val64 |= ADAPTER_LED_ON;
5879                                         writeq(val64, &bar0->adapter_control);
5880                                 }
5881                                 nic->device_enabled_once = TRUE;
5882                         } else {
5883                                 DBG_PRINT(ERR_DBG, "%s: Error: ", dev->name);
5884                                 DBG_PRINT(ERR_DBG, "device is not Quiescent\n");
5885                                 netif_stop_queue(dev);
5886                         }
5887                 }
5888                 val64 = readq(&bar0->adapter_status);
5889                 if (!LINK_IS_UP(val64)) {
5890                         DBG_PRINT(ERR_DBG, "%s:", dev->name);
5891                         DBG_PRINT(ERR_DBG, " Link down after enabling ");
5892                         DBG_PRINT(ERR_DBG, "device \n");
5893                 } else
5894                         s2io_link(nic, LINK_UP);
5895         } else {
5896                 if (CARDS_WITH_FAULTY_LINK_INDICATORS(nic->device_type,
5897                                                       subid)) {
5898                         val64 = readq(&bar0->gpio_control);
5899                         val64 &= ~GPIO_CTRL_GPIO_0;
5900                         writeq(val64, &bar0->gpio_control);
5901                         val64 = readq(&bar0->gpio_control);
5902                 }
5903                 s2io_link(nic, LINK_DOWN);
5904         }
5905         clear_bit(0, &(nic->link_state));
5906 }
5907
5908 static int set_rxd_buffer_pointer(struct s2io_nic *sp, struct RxD_t *rxdp,
5909                                 struct buffAdd *ba,
5910                                 struct sk_buff **skb, u64 *temp0, u64 *temp1,
5911                                 u64 *temp2, int size)
5912 {
5913         struct net_device *dev = sp->dev;
5914         struct sk_buff *frag_list;
5915
5916         if ((sp->rxd_mode == RXD_MODE_1) && (rxdp->Host_Control == 0)) {
5917                 /* allocate skb */
5918                 if (*skb) {
5919                         DBG_PRINT(INFO_DBG, "SKB is not NULL\n");
5920                         /*
5921                          * As Rx frame are not going to be processed,
5922                          * using same mapped address for the Rxd
5923                          * buffer pointer
5924                          */
5925                         ((struct RxD1*)rxdp)->Buffer0_ptr = *temp0;
5926                 } else {
5927                         *skb = dev_alloc_skb(size);
5928                         if (!(*skb)) {
5929                                 DBG_PRINT(ERR_DBG, "%s: Out of ", dev->name);
5930                                 DBG_PRINT(ERR_DBG, "memory to allocate SKBs\n");
5931                                 return -ENOMEM ;
5932                         }
5933                         /* storing the mapped addr in a temp variable
5934                          * such it will be used for next rxd whose
5935                          * Host Control is NULL
5936                          */
5937                         ((struct RxD1*)rxdp)->Buffer0_ptr = *temp0 =
5938                                 pci_map_single( sp->pdev, (*skb)->data,
5939                                         size - NET_IP_ALIGN,
5940                                         PCI_DMA_FROMDEVICE);
5941                         rxdp->Host_Control = (unsigned long) (*skb);
5942                 }
5943         } else if ((sp->rxd_mode == RXD_MODE_3B) && (rxdp->Host_Control == 0)) {
5944                 /* Two buffer Mode */
5945                 if (*skb) {
5946                         ((struct RxD3*)rxdp)->Buffer2_ptr = *temp2;
5947                         ((struct RxD3*)rxdp)->Buffer0_ptr = *temp0;
5948                         ((struct RxD3*)rxdp)->Buffer1_ptr = *temp1;
5949                 } else {
5950                         *skb = dev_alloc_skb(size);
5951                         if (!(*skb)) {
5952                                 DBG_PRINT(ERR_DBG, "%s: dev_alloc_skb failed\n",
5953                                         dev->name);
5954                                 return -ENOMEM;
5955                         }
5956                         ((struct RxD3*)rxdp)->Buffer2_ptr = *temp2 =
5957                                 pci_map_single(sp->pdev, (*skb)->data,
5958                                                dev->mtu + 4,
5959                                                PCI_DMA_FROMDEVICE);
5960                         ((struct RxD3*)rxdp)->Buffer0_ptr = *temp0 =
5961                                 pci_map_single( sp->pdev, ba->ba_0, BUF0_LEN,
5962                                                 PCI_DMA_FROMDEVICE);
5963                         rxdp->Host_Control = (unsigned long) (*skb);
5964
5965                         /* Buffer-1 will be dummy buffer not used */
5966                         ((struct RxD3*)rxdp)->Buffer1_ptr = *temp1 =
5967                                 pci_map_single(sp->pdev, ba->ba_1, BUF1_LEN,
5968                                                PCI_DMA_FROMDEVICE);
5969                 }
5970         } else if ((rxdp->Host_Control == 0)) {
5971                 /* Three buffer mode */
5972                 if (*skb) {
5973                         ((struct RxD3*)rxdp)->Buffer0_ptr = *temp0;
5974                         ((struct RxD3*)rxdp)->Buffer1_ptr = *temp1;
5975                         ((struct RxD3*)rxdp)->Buffer2_ptr = *temp2;
5976                 } else {
5977                         *skb = dev_alloc_skb(size);
5978                         if (!(*skb)) {
5979                                 DBG_PRINT(ERR_DBG, "%s: dev_alloc_skb failed\n",
5980                                           dev->name);
5981                                 return -ENOMEM;
5982                         }
5983                         ((struct RxD3*)rxdp)->Buffer0_ptr = *temp0 =
5984                                 pci_map_single(sp->pdev, ba->ba_0, BUF0_LEN,
5985                                                PCI_DMA_FROMDEVICE);
5986                         /* Buffer-1 receives L3/L4 headers */
5987                         ((struct RxD3*)rxdp)->Buffer1_ptr = *temp1 =
5988                                 pci_map_single( sp->pdev, (*skb)->data,
5989                                                 l3l4hdr_size + 4,
5990                                                 PCI_DMA_FROMDEVICE);
5991                         /*
5992                          * skb_shinfo(skb)->frag_list will have L4
5993                          * data payload
5994                          */
5995                         skb_shinfo(*skb)->frag_list = dev_alloc_skb(dev->mtu +
5996                                                                    ALIGN_SIZE);
5997                         if (skb_shinfo(*skb)->frag_list == NULL) {
5998                                 DBG_PRINT(ERR_DBG, "%s: dev_alloc_skb \
5999                                           failed\n ", dev->name);
6000                                 return -ENOMEM ;
6001                         }
6002                         frag_list = skb_shinfo(*skb)->frag_list;
6003                         frag_list->next = NULL;
6004                         /*
6005                          * Buffer-2 receives L4 data payload
6006                          */
6007                         ((struct RxD3*)rxdp)->Buffer2_ptr = *temp2 =
6008                                 pci_map_single( sp->pdev, frag_list->data,
6009                                                 dev->mtu, PCI_DMA_FROMDEVICE);
6010                 }
6011         }
6012         return 0;
6013 }
6014 static void set_rxd_buffer_size(struct s2io_nic *sp, struct RxD_t *rxdp,
6015                                 int size)
6016 {
6017         struct net_device *dev = sp->dev;
6018         if (sp->rxd_mode == RXD_MODE_1) {
6019                 rxdp->Control_2 = SET_BUFFER0_SIZE_1( size - NET_IP_ALIGN);
6020         } else if (sp->rxd_mode == RXD_MODE_3B) {
6021                 rxdp->Control_2 = SET_BUFFER0_SIZE_3(BUF0_LEN);
6022                 rxdp->Control_2 |= SET_BUFFER1_SIZE_3(1);
6023                 rxdp->Control_2 |= SET_BUFFER2_SIZE_3( dev->mtu + 4);
6024         } else {
6025                 rxdp->Control_2 = SET_BUFFER0_SIZE_3(BUF0_LEN);
6026                 rxdp->Control_2 |= SET_BUFFER1_SIZE_3(l3l4hdr_size + 4);
6027                 rxdp->Control_2 |= SET_BUFFER2_SIZE_3(dev->mtu);
6028         }
6029 }
6030
6031 static  int rxd_owner_bit_reset(struct s2io_nic *sp)
6032 {
6033         int i, j, k, blk_cnt = 0, size;
6034         struct mac_info * mac_control = &sp->mac_control;
6035         struct config_param *config = &sp->config;
6036         struct net_device *dev = sp->dev;
6037         struct RxD_t *rxdp = NULL;
6038         struct sk_buff *skb = NULL;
6039         struct buffAdd *ba = NULL;
6040         u64 temp0_64 = 0, temp1_64 = 0, temp2_64 = 0;
6041
6042         /* Calculate the size based on ring mode */
6043         size = dev->mtu + HEADER_ETHERNET_II_802_3_SIZE +
6044                 HEADER_802_2_SIZE + HEADER_SNAP_SIZE;
6045         if (sp->rxd_mode == RXD_MODE_1)
6046                 size += NET_IP_ALIGN;
6047         else if (sp->rxd_mode == RXD_MODE_3B)
6048                 size = dev->mtu + ALIGN_SIZE + BUF0_LEN + 4;
6049         else
6050                 size = l3l4hdr_size + ALIGN_SIZE + BUF0_LEN + 4;
6051
6052         for (i = 0; i < config->rx_ring_num; i++) {
6053                 blk_cnt = config->rx_cfg[i].num_rxd /
6054                         (rxd_count[sp->rxd_mode] +1);
6055
6056                 for (j = 0; j < blk_cnt; j++) {
6057                         for (k = 0; k < rxd_count[sp->rxd_mode]; k++) {
6058                                 rxdp = mac_control->rings[i].
6059                                         rx_blocks[j].rxds[k].virt_addr;
6060                                 if(sp->rxd_mode >= RXD_MODE_3A)
6061                                         ba = &mac_control->rings[i].ba[j][k];
6062                                 set_rxd_buffer_pointer(sp, rxdp, ba,
6063                                                        &skb,(u64 *)&temp0_64,
6064                                                        (u64 *)&temp1_64,
6065                                                        (u64 *)&temp2_64, size);
6066
6067                                 set_rxd_buffer_size(sp, rxdp, size);
6068                                 wmb();
6069                                 /* flip the Ownership bit to Hardware */
6070                                 rxdp->Control_1 |= RXD_OWN_XENA;
6071                         }
6072                 }
6073         }
6074         return 0;
6075
6076 }
6077
6078 static int s2io_add_isr(struct s2io_nic * sp)
6079 {
6080         int ret = 0;
6081         struct net_device *dev = sp->dev;
6082         int err = 0;
6083
6084         if (sp->intr_type == MSI)
6085                 ret = s2io_enable_msi(sp);
6086         else if (sp->intr_type == MSI_X)
6087                 ret = s2io_enable_msi_x(sp);
6088         if (ret) {
6089                 DBG_PRINT(ERR_DBG, "%s: Defaulting to INTA\n", dev->name);
6090                 sp->intr_type = INTA;
6091         }
6092
6093         /* Store the values of the MSIX table in the struct s2io_nic structure */
6094         store_xmsi_data(sp);
6095
6096         /* After proper initialization of H/W, register ISR */
6097         if (sp->intr_type == MSI) {
6098                 err = request_irq((int) sp->pdev->irq, s2io_msi_handle,
6099                         IRQF_SHARED, sp->name, dev);
6100                 if (err) {
6101                         pci_disable_msi(sp->pdev);
6102                         DBG_PRINT(ERR_DBG, "%s: MSI registration failed\n",
6103                                   dev->name);
6104                         return -1;
6105                 }
6106         }
6107         if (sp->intr_type == MSI_X) {
6108                 int i;
6109
6110                 for (i=1; (sp->s2io_entries[i].in_use == MSIX_FLG); i++) {
6111                         if (sp->s2io_entries[i].type == MSIX_FIFO_TYPE) {
6112                                 sprintf(sp->desc[i], "%s:MSI-X-%d-TX",
6113                                         dev->name, i);
6114                                 err = request_irq(sp->entries[i].vector,
6115                                           s2io_msix_fifo_handle, 0, sp->desc[i],
6116                                                   sp->s2io_entries[i].arg);
6117                                 DBG_PRINT(ERR_DBG, "%s @ 0x%llx\n", sp->desc[i],
6118                                 (unsigned long long)sp->msix_info[i].addr);
6119                         } else {
6120                                 sprintf(sp->desc[i], "%s:MSI-X-%d-RX",
6121                                         dev->name, i);
6122                                 err = request_irq(sp->entries[i].vector,
6123                                           s2io_msix_ring_handle, 0, sp->desc[i],
6124                                                   sp->s2io_entries[i].arg);
6125                                 DBG_PRINT(ERR_DBG, "%s @ 0x%llx\n", sp->desc[i],
6126                                 (unsigned long long)sp->msix_info[i].addr);
6127                         }
6128                         if (err) {
6129                                 DBG_PRINT(ERR_DBG,"%s:MSI-X-%d registration "
6130                                           "failed\n", dev->name, i);
6131                                 DBG_PRINT(ERR_DBG, "Returned: %d\n", err);
6132                                 return -1;
6133                         }
6134                         sp->s2io_entries[i].in_use = MSIX_REGISTERED_SUCCESS;
6135                 }
6136         }
6137         if (sp->intr_type == INTA) {
6138                 err = request_irq((int) sp->pdev->irq, s2io_isr, IRQF_SHARED,
6139                                 sp->name, dev);
6140                 if (err) {
6141                         DBG_PRINT(ERR_DBG, "%s: ISR registration failed\n",
6142                                   dev->name);
6143                         return -1;
6144                 }
6145         }
6146         return 0;
6147 }
6148 static void s2io_rem_isr(struct s2io_nic * sp)
6149 {
6150         int cnt = 0;
6151         struct net_device *dev = sp->dev;
6152
6153         if (sp->intr_type == MSI_X) {
6154                 int i;
6155                 u16 msi_control;
6156
6157                 for (i=1; (sp->s2io_entries[i].in_use ==
6158                         MSIX_REGISTERED_SUCCESS); i++) {
6159                         int vector = sp->entries[i].vector;
6160                         void *arg = sp->s2io_entries[i].arg;
6161
6162                         free_irq(vector, arg);
6163                 }
6164                 pci_read_config_word(sp->pdev, 0x42, &msi_control);
6165                 msi_control &= 0xFFFE; /* Disable MSI */
6166                 pci_write_config_word(sp->pdev, 0x42, msi_control);
6167
6168                 pci_disable_msix(sp->pdev);
6169         } else {
6170                 free_irq(sp->pdev->irq, dev);
6171                 if (sp->intr_type == MSI) {
6172                         u16 val;
6173
6174                         pci_disable_msi(sp->pdev);
6175                         pci_read_config_word(sp->pdev, 0x4c, &val);
6176                         val ^= 0x1;
6177                         pci_write_config_word(sp->pdev, 0x4c, val);
6178                 }
6179         }
6180         /* Waiting till all Interrupt handlers are complete */
6181         cnt = 0;
6182         do {
6183                 msleep(10);
6184                 if (!atomic_read(&sp->isr_cnt))
6185                         break;
6186                 cnt++;
6187         } while(cnt < 5);
6188 }
6189
6190 static void s2io_card_down(struct s2io_nic * sp)
6191 {
6192         int cnt = 0;
6193         struct XENA_dev_config __iomem *bar0 = sp->bar0;
6194         unsigned long flags;
6195         register u64 val64 = 0;
6196
6197         del_timer_sync(&sp->alarm_timer);
6198         /* If s2io_set_link task is executing, wait till it completes. */
6199         while (test_and_set_bit(0, &(sp->link_state))) {
6200                 msleep(50);
6201         }
6202         atomic_set(&sp->card_state, CARD_DOWN);
6203
6204         /* disable Tx and Rx traffic on the NIC */
6205         stop_nic(sp);
6206
6207         s2io_rem_isr(sp);
6208
6209         /* Kill tasklet. */
6210         tasklet_kill(&sp->task);
6211
6212         /* Check if the device is Quiescent and then Reset the NIC */
6213         do {
6214                 /* As per the HW requirement we need to replenish the
6215                  * receive buffer to avoid the ring bump. Since there is
6216                  * no intention of processing the Rx frame at this pointwe are
6217                  * just settting the ownership bit of rxd in Each Rx
6218                  * ring to HW and set the appropriate buffer size
6219                  * based on the ring mode
6220                  */
6221                 rxd_owner_bit_reset(sp);
6222
6223                 val64 = readq(&bar0->adapter_status);
6224                 if (verify_xena_quiescence(sp)) {
6225                         if(verify_pcc_quiescent(sp, sp->device_enabled_once))
6226                         break;
6227                 }
6228
6229                 msleep(50);
6230                 cnt++;
6231                 if (cnt == 10) {
6232                         DBG_PRINT(ERR_DBG,
6233                                   "s2io_close:Device not Quiescent ");
6234                         DBG_PRINT(ERR_DBG, "adaper status reads 0x%llx\n",
6235                                   (unsigned long long) val64);
6236                         break;
6237                 }
6238         } while (1);
6239         s2io_reset(sp);
6240
6241         spin_lock_irqsave(&sp->tx_lock, flags);
6242         /* Free all Tx buffers */
6243         free_tx_buffers(sp);
6244         spin_unlock_irqrestore(&sp->tx_lock, flags);
6245
6246         /* Free all Rx buffers */
6247         spin_lock_irqsave(&sp->rx_lock, flags);
6248         free_rx_buffers(sp);
6249         spin_unlock_irqrestore(&sp->rx_lock, flags);
6250
6251         clear_bit(0, &(sp->link_state));
6252 }
6253
6254 static int s2io_card_up(struct s2io_nic * sp)
6255 {
6256         int i, ret = 0;
6257         struct mac_info *mac_control;
6258         struct config_param *config;
6259         struct net_device *dev = (struct net_device *) sp->dev;
6260         u16 interruptible;
6261
6262         /* Initialize the H/W I/O registers */
6263         if (init_nic(sp) != 0) {
6264                 DBG_PRINT(ERR_DBG, "%s: H/W initialization failed\n",
6265                           dev->name);
6266                 s2io_reset(sp);
6267                 return -ENODEV;
6268         }
6269
6270         /*
6271          * Initializing the Rx buffers. For now we are considering only 1
6272          * Rx ring and initializing buffers into 30 Rx blocks
6273          */
6274         mac_control = &sp->mac_control;
6275         config = &sp->config;
6276
6277         for (i = 0; i < config->rx_ring_num; i++) {
6278                 if ((ret = fill_rx_buffers(sp, i))) {
6279                         DBG_PRINT(ERR_DBG, "%s: Out of memory in Open\n",
6280                                   dev->name);
6281                         s2io_reset(sp);
6282                         free_rx_buffers(sp);
6283                         return -ENOMEM;
6284                 }
6285                 DBG_PRINT(INFO_DBG, "Buf in ring:%d is %d:\n", i,
6286                           atomic_read(&sp->rx_bufs_left[i]));
6287         }
6288         /* Maintain the state prior to the open */
6289         if (sp->promisc_flg)
6290                 sp->promisc_flg = 0;
6291         if (sp->m_cast_flg) {
6292                 sp->m_cast_flg = 0;
6293                 sp->all_multi_pos= 0;
6294         }
6295
6296         /* Setting its receive mode */
6297         s2io_set_multicast(dev);
6298
6299         if (sp->lro) {
6300                 /* Initialize max aggregatable pkts per session based on MTU */
6301                 sp->lro_max_aggr_per_sess = ((1<<16) - 1) / dev->mtu;
6302                 /* Check if we can use(if specified) user provided value */
6303                 if (lro_max_pkts < sp->lro_max_aggr_per_sess)
6304                         sp->lro_max_aggr_per_sess = lro_max_pkts;
6305         }
6306
6307         /* Enable Rx Traffic and interrupts on the NIC */
6308         if (start_nic(sp)) {
6309                 DBG_PRINT(ERR_DBG, "%s: Starting NIC failed\n", dev->name);
6310                 s2io_reset(sp);
6311                 free_rx_buffers(sp);
6312                 return -ENODEV;
6313         }
6314
6315         /* Add interrupt service routine */
6316         if (s2io_add_isr(sp) != 0) {
6317                 if (sp->intr_type == MSI_X)
6318                         s2io_rem_isr(sp);
6319                 s2io_reset(sp);
6320                 free_rx_buffers(sp);
6321                 return -ENODEV;
6322         }
6323
6324         S2IO_TIMER_CONF(sp->alarm_timer, s2io_alarm_handle, sp, (HZ/2));
6325
6326         /* Enable tasklet for the device */
6327         tasklet_init(&sp->task, s2io_tasklet, (unsigned long) dev);
6328
6329         /*  Enable select interrupts */
6330         if (sp->intr_type != INTA)
6331                 en_dis_able_nic_intrs(sp, ENA_ALL_INTRS, DISABLE_INTRS);
6332         else {
6333                 interruptible = TX_TRAFFIC_INTR | RX_TRAFFIC_INTR;
6334                 interruptible |= TX_PIC_INTR | RX_PIC_INTR;
6335                 interruptible |= TX_MAC_INTR | RX_MAC_INTR;
6336                 en_dis_able_nic_intrs(sp, interruptible, ENABLE_INTRS);
6337         }
6338
6339
6340         atomic_set(&sp->card_state, CARD_UP);
6341         return 0;
6342 }
6343
6344 /**
6345  * s2io_restart_nic - Resets the NIC.
6346  * @data : long pointer to the device private structure
6347  * Description:
6348  * This function is scheduled to be run by the s2io_tx_watchdog
6349  * function after 0.5 secs to reset the NIC. The idea is to reduce
6350  * the run time of the watch dog routine which is run holding a
6351  * spin lock.
6352  */
6353
6354 static void s2io_restart_nic(struct work_struct *work)
6355 {
6356         struct s2io_nic *sp = container_of(work, struct s2io_nic, rst_timer_task);
6357         struct net_device *dev = sp->dev;
6358
6359         s2io_card_down(sp);
6360         if (s2io_card_up(sp)) {
6361                 DBG_PRINT(ERR_DBG, "%s: Device bring up failed\n",
6362                           dev->name);
6363         }
6364         netif_wake_queue(dev);
6365         DBG_PRINT(ERR_DBG, "%s: was reset by Tx watchdog timer\n",
6366                   dev->name);
6367
6368 }
6369
6370 /**
6371  *  s2io_tx_watchdog - Watchdog for transmit side.
6372  *  @dev : Pointer to net device structure
6373  *  Description:
6374  *  This function is triggered if the Tx Queue is stopped
6375  *  for a pre-defined amount of time when the Interface is still up.
6376  *  If the Interface is jammed in such a situation, the hardware is
6377  *  reset (by s2io_close) and restarted again (by s2io_open) to
6378  *  overcome any problem that might have been caused in the hardware.
6379  *  Return value:
6380  *  void
6381  */
6382
6383 static void s2io_tx_watchdog(struct net_device *dev)
6384 {
6385         struct s2io_nic *sp = dev->priv;
6386
6387         if (netif_carrier_ok(dev)) {
6388                 schedule_work(&sp->rst_timer_task);
6389                 sp->mac_control.stats_info->sw_stat.soft_reset_cnt++;
6390         }
6391 }
6392
6393 /**
6394  *   rx_osm_handler - To perform some OS related operations on SKB.
6395  *   @sp: private member of the device structure,pointer to s2io_nic structure.
6396  *   @skb : the socket buffer pointer.
6397  *   @len : length of the packet
6398  *   @cksum : FCS checksum of the frame.
6399  *   @ring_no : the ring from which this RxD was extracted.
6400  *   Description:
6401  *   This function is called by the Rx interrupt serivce routine to perform
6402  *   some OS related operations on the SKB before passing it to the upper
6403  *   layers. It mainly checks if the checksum is OK, if so adds it to the
6404  *   SKBs cksum variable, increments the Rx packet count and passes the SKB
6405  *   to the upper layer. If the checksum is wrong, it increments the Rx
6406  *   packet error count, frees the SKB and returns error.
6407  *   Return value:
6408  *   SUCCESS on success and -1 on failure.
6409  */
6410 static int rx_osm_handler(struct ring_info *ring_data, struct RxD_t * rxdp)
6411 {
6412         struct s2io_nic *sp = ring_data->nic;
6413         struct net_device *dev = (struct net_device *) sp->dev;
6414         struct sk_buff *skb = (struct sk_buff *)
6415                 ((unsigned long) rxdp->Host_Control);
6416         int ring_no = ring_data->ring_no;
6417         u16 l3_csum, l4_csum;
6418         unsigned long long err = rxdp->Control_1 & RXD_T_CODE;
6419         struct lro *lro;
6420
6421         skb->dev = dev;
6422
6423         if (err) {
6424                 /* Check for parity error */
6425                 if (err & 0x1) {
6426                         sp->mac_control.stats_info->sw_stat.parity_err_cnt++;
6427                 }
6428
6429                 /*
6430                 * Drop the packet if bad transfer code. Exception being
6431                 * 0x5, which could be due to unsupported IPv6 extension header.
6432                 * In this case, we let stack handle the packet.
6433                 * Note that in this case, since checksum will be incorrect,
6434                 * stack will validate the same.
6435                 */
6436                 if (err && ((err >> 48) != 0x5)) {
6437                         DBG_PRINT(ERR_DBG, "%s: Rx error Value: 0x%llx\n",
6438                                 dev->name, err);
6439                         sp->stats.rx_crc_errors++;
6440                         dev_kfree_skb(skb);
6441                         atomic_dec(&sp->rx_bufs_left[ring_no]);
6442                         rxdp->Host_Control = 0;
6443                         return 0;
6444                 }
6445         }
6446
6447         /* Updating statistics */
6448         rxdp->Host_Control = 0;
6449         sp->rx_pkt_count++;
6450         sp->stats.rx_packets++;
6451         if (sp->rxd_mode == RXD_MODE_1) {
6452                 int len = RXD_GET_BUFFER0_SIZE_1(rxdp->Control_2);
6453
6454                 sp->stats.rx_bytes += len;
6455                 skb_put(skb, len);
6456
6457         } else if (sp->rxd_mode >= RXD_MODE_3A) {
6458                 int get_block = ring_data->rx_curr_get_info.block_index;
6459                 int get_off = ring_data->rx_curr_get_info.offset;
6460                 int buf0_len = RXD_GET_BUFFER0_SIZE_3(rxdp->Control_2);
6461                 int buf2_len = RXD_GET_BUFFER2_SIZE_3(rxdp->Control_2);
6462                 unsigned char *buff = skb_push(skb, buf0_len);
6463
6464                 struct buffAdd *ba = &ring_data->ba[get_block][get_off];
6465                 sp->stats.rx_bytes += buf0_len + buf2_len;
6466                 memcpy(buff, ba->ba_0, buf0_len);
6467
6468                 if (sp->rxd_mode == RXD_MODE_3A) {
6469                         int buf1_len = RXD_GET_BUFFER1_SIZE_3(rxdp->Control_2);
6470
6471                         skb_put(skb, buf1_len);
6472                         skb->len += buf2_len;
6473                         skb->data_len += buf2_len;
6474                         skb_put(skb_shinfo(skb)->frag_list, buf2_len);
6475                         sp->stats.rx_bytes += buf1_len;
6476
6477                 } else
6478                         skb_put(skb, buf2_len);
6479         }
6480
6481         if ((rxdp->Control_1 & TCP_OR_UDP_FRAME) && ((!sp->lro) ||
6482             (sp->lro && (!(rxdp->Control_1 & RXD_FRAME_IP_FRAG)))) &&
6483             (sp->rx_csum)) {
6484                 l3_csum = RXD_GET_L3_CKSUM(rxdp->Control_1);
6485                 l4_csum = RXD_GET_L4_CKSUM(rxdp->Control_1);
6486                 if ((l3_csum == L3_CKSUM_OK) && (l4_csum == L4_CKSUM_OK)) {
6487                         /*
6488                          * NIC verifies if the Checksum of the received
6489                          * frame is Ok or not and accordingly returns
6490                          * a flag in the RxD.
6491                          */
6492                         skb->ip_summed = CHECKSUM_UNNECESSARY;
6493                         if (sp->lro) {
6494                                 u32 tcp_len;
6495                                 u8 *tcp;
6496                                 int ret = 0;
6497
6498                                 ret = s2io_club_tcp_session(skb->data, &tcp,
6499                                                 &tcp_len, &lro, rxdp, sp);
6500                                 switch (ret) {
6501                                         case 3: /* Begin anew */
6502                                                 lro->parent = skb;
6503                                                 goto aggregate;
6504                                         case 1: /* Aggregate */
6505                                         {
6506                                                 lro_append_pkt(sp, lro,
6507                                                         skb, tcp_len);
6508                                                 goto aggregate;
6509                                         }
6510                                         case 4: /* Flush session */
6511                                         {
6512                                                 lro_append_pkt(sp, lro,
6513                                                         skb, tcp_len);
6514                                                 queue_rx_frame(lro->parent);
6515                                                 clear_lro_session(lro);
6516                                                 sp->mac_control.stats_info->
6517                                                     sw_stat.flush_max_pkts++;
6518                                                 goto aggregate;
6519                                         }
6520                                         case 2: /* Flush both */
6521                                                 lro->parent->data_len =
6522                                                         lro->frags_len;
6523                                                 sp->mac_control.stats_info->
6524                                                      sw_stat.sending_both++;
6525                                                 queue_rx_frame(lro->parent);
6526                                                 clear_lro_session(lro);
6527                                                 goto send_up;
6528                                         case 0: /* sessions exceeded */
6529                                         case -1: /* non-TCP or not
6530                                                   * L2 aggregatable
6531                                                   */
6532                                         case 5: /*
6533                                                  * First pkt in session not
6534                                                  * L3/L4 aggregatable
6535                                                  */
6536                                                 break;
6537                                         default:
6538                                                 DBG_PRINT(ERR_DBG,
6539                                                         "%s: Samadhana!!\n",
6540                                                          __FUNCTION__);
6541                                                 BUG();
6542                                 }
6543                         }
6544                 } else {
6545                         /*
6546                          * Packet with erroneous checksum, let the
6547                          * upper layers deal with it.
6548                          */
6549                         skb->ip_summed = CHECKSUM_NONE;
6550                 }
6551         } else {
6552                 skb->ip_summed = CHECKSUM_NONE;
6553         }
6554
6555         if (!sp->lro) {
6556                 skb->protocol = eth_type_trans(skb, dev);
6557                 if (sp->vlgrp && RXD_GET_VLAN_TAG(rxdp->Control_2)) {
6558                         /* Queueing the vlan frame to the upper layer */
6559                         if (napi)
6560                                 vlan_hwaccel_receive_skb(skb, sp->vlgrp,
6561                                         RXD_GET_VLAN_TAG(rxdp->Control_2));
6562                         else
6563                                 vlan_hwaccel_rx(skb, sp->vlgrp,
6564                                         RXD_GET_VLAN_TAG(rxdp->Control_2));
6565                 } else {
6566                         if (napi)
6567                                 netif_receive_skb(skb);
6568                         else
6569                                 netif_rx(skb);
6570                 }
6571         } else {
6572 send_up:
6573                 queue_rx_frame(skb);
6574         }
6575         dev->last_rx = jiffies;
6576 aggregate:
6577         atomic_dec(&sp->rx_bufs_left[ring_no]);
6578         return SUCCESS;
6579 }
6580
6581 /**
6582  *  s2io_link - stops/starts the Tx queue.
6583  *  @sp : private member of the device structure, which is a pointer to the
6584  *  s2io_nic structure.
6585  *  @link : inidicates whether link is UP/DOWN.
6586  *  Description:
6587  *  This function stops/starts the Tx queue depending on whether the link
6588  *  status of the NIC is is down or up. This is called by the Alarm
6589  *  interrupt handler whenever a link change interrupt comes up.
6590  *  Return value:
6591  *  void.
6592  */
6593
6594 static void s2io_link(struct s2io_nic * sp, int link)
6595 {
6596         struct net_device *dev = (struct net_device *) sp->dev;
6597
6598         if (link != sp->last_link_state) {
6599                 if (link == LINK_DOWN) {
6600                         DBG_PRINT(ERR_DBG, "%s: Link down\n", dev->name);
6601                         netif_carrier_off(dev);
6602                 } else {
6603                         DBG_PRINT(ERR_DBG, "%s: Link Up\n", dev->name);
6604                         netif_carrier_on(dev);
6605                 }
6606         }
6607         sp->last_link_state = link;
6608 }
6609
6610 /**
6611  *  get_xena_rev_id - to identify revision ID of xena.
6612  *  @pdev : PCI Dev structure
6613  *  Description:
6614  *  Function to identify the Revision ID of xena.
6615  *  Return value:
6616  *  returns the revision ID of the device.
6617  */
6618
6619 static int get_xena_rev_id(struct pci_dev *pdev)
6620 {
6621         u8 id = 0;
6622         int ret;
6623         ret = pci_read_config_byte(pdev, PCI_REVISION_ID, (u8 *) & id);
6624         return id;
6625 }
6626
6627 /**
6628  *  s2io_init_pci -Initialization of PCI and PCI-X configuration registers .
6629  *  @sp : private member of the device structure, which is a pointer to the
6630  *  s2io_nic structure.
6631  *  Description:
6632  *  This function initializes a few of the PCI and PCI-X configuration registers
6633  *  with recommended values.
6634  *  Return value:
6635  *  void
6636  */
6637
6638 static void s2io_init_pci(struct s2io_nic * sp)
6639 {
6640         u16 pci_cmd = 0, pcix_cmd = 0;
6641
6642         /* Enable Data Parity Error Recovery in PCI-X command register. */
6643         pci_read_config_word(sp->pdev, PCIX_COMMAND_REGISTER,
6644                              &(pcix_cmd));
6645         pci_write_config_word(sp->pdev, PCIX_COMMAND_REGISTER,
6646                               (pcix_cmd | 1));
6647         pci_read_config_word(sp->pdev, PCIX_COMMAND_REGISTER,
6648                              &(pcix_cmd));
6649
6650         /* Set the PErr Response bit in PCI command register. */
6651         pci_read_config_word(sp->pdev, PCI_COMMAND, &pci_cmd);
6652         pci_write_config_word(sp->pdev, PCI_COMMAND,
6653                               (pci_cmd | PCI_COMMAND_PARITY));
6654         pci_read_config_word(sp->pdev, PCI_COMMAND, &pci_cmd);
6655 }
6656
6657 static int s2io_verify_parm(struct pci_dev *pdev, u8 *dev_intr_type)
6658 {
6659         if ( tx_fifo_num > 8) {
6660                 DBG_PRINT(ERR_DBG, "s2io: Requested number of Tx fifos not "
6661                          "supported\n");
6662                 DBG_PRINT(ERR_DBG, "s2io: Default to 8 Tx fifos\n");
6663                 tx_fifo_num = 8;
6664         }
6665         if ( rx_ring_num > 8) {
6666                 DBG_PRINT(ERR_DBG, "s2io: Requested number of Rx rings not "
6667                          "supported\n");
6668                 DBG_PRINT(ERR_DBG, "s2io: Default to 8 Rx rings\n");
6669                 rx_ring_num = 8;
6670         }
6671         if (*dev_intr_type != INTA)
6672                 napi = 0;
6673
6674 #ifndef CONFIG_PCI_MSI
6675         if (*dev_intr_type != INTA) {
6676                 DBG_PRINT(ERR_DBG, "s2io: This kernel does not support"
6677                           "MSI/MSI-X. Defaulting to INTA\n");
6678                 *dev_intr_type = INTA;
6679         }
6680 #else
6681         if (*dev_intr_type > MSI_X) {
6682                 DBG_PRINT(ERR_DBG, "s2io: Wrong intr_type requested. "
6683                           "Defaulting to INTA\n");
6684                 *dev_intr_type = INTA;
6685         }
6686 #endif
6687         if ((*dev_intr_type == MSI_X) &&
6688                         ((pdev->device != PCI_DEVICE_ID_HERC_WIN) &&
6689                         (pdev->device != PCI_DEVICE_ID_HERC_UNI))) {
6690                 DBG_PRINT(ERR_DBG, "s2io: Xframe I does not support MSI_X. "
6691                                         "Defaulting to INTA\n");
6692                 *dev_intr_type = INTA;
6693         }
6694         if ( (rx_ring_num > 1) && (*dev_intr_type != INTA) )
6695                 napi = 0;
6696         if (rx_ring_mode > 3) {
6697                 DBG_PRINT(ERR_DBG, "s2io: Requested ring mode not supported\n");
6698                 DBG_PRINT(ERR_DBG, "s2io: Defaulting to 3-buffer mode\n");
6699                 rx_ring_mode = 3;
6700         }
6701         return SUCCESS;
6702 }
6703
6704 /**
6705  *  s2io_init_nic - Initialization of the adapter .
6706  *  @pdev : structure containing the PCI related information of the device.
6707  *  @pre: List of PCI devices supported by the driver listed in s2io_tbl.
6708  *  Description:
6709  *  The function initializes an adapter identified by the pci_dec structure.
6710  *  All OS related initialization including memory and device structure and
6711  *  initlaization of the device private variable is done. Also the swapper
6712  *  control register is initialized to enable read and write into the I/O
6713  *  registers of the device.
6714  *  Return value:
6715  *  returns 0 on success and negative on failure.
6716  */
6717
6718 static int __devinit
6719 s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre)
6720 {
6721         struct s2io_nic *sp;
6722         struct net_device *dev;
6723         int i, j, ret;
6724         int dma_flag = FALSE;
6725         u32 mac_up, mac_down;
6726         u64 val64 = 0, tmp64 = 0;
6727         struct XENA_dev_config __iomem *bar0 = NULL;
6728         u16 subid;
6729         struct mac_info *mac_control;
6730         struct config_param *config;
6731         int mode;
6732         u8 dev_intr_type = intr_type;
6733
6734         if ((ret = s2io_verify_parm(pdev, &dev_intr_type)))
6735                 return ret;
6736
6737         if ((ret = pci_enable_device(pdev))) {
6738                 DBG_PRINT(ERR_DBG,
6739                           "s2io_init_nic: pci_enable_device failed\n");
6740                 return ret;
6741         }
6742
6743         if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
6744                 DBG_PRINT(INIT_DBG, "s2io_init_nic: Using 64bit DMA\n");
6745                 dma_flag = TRUE;
6746                 if (pci_set_consistent_dma_mask
6747                     (pdev, DMA_64BIT_MASK)) {
6748                         DBG_PRINT(ERR_DBG,
6749                                   "Unable to obtain 64bit DMA for \
6750                                         consistent allocations\n");
6751                         pci_disable_device(pdev);
6752                         return -ENOMEM;
6753                 }
6754         } else if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
6755                 DBG_PRINT(INIT_DBG, "s2io_init_nic: Using 32bit DMA\n");
6756         } else {
6757                 pci_disable_device(pdev);
6758                 return -ENOMEM;
6759         }
6760         if (dev_intr_type != MSI_X) {
6761                 if (pci_request_regions(pdev, s2io_driver_name)) {
6762                         DBG_PRINT(ERR_DBG, "Request Regions failed\n");
6763                         pci_disable_device(pdev);
6764                         return -ENODEV;
6765                 }
6766         }
6767         else {
6768                 if (!(request_mem_region(pci_resource_start(pdev, 0),
6769                          pci_resource_len(pdev, 0), s2io_driver_name))) {
6770                         DBG_PRINT(ERR_DBG, "bar0 Request Regions failed\n");
6771                         pci_disable_device(pdev);
6772                         return -ENODEV;
6773                 }
6774                 if (!(request_mem_region(pci_resource_start(pdev, 2),
6775                          pci_resource_len(pdev, 2), s2io_driver_name))) {
6776                         DBG_PRINT(ERR_DBG, "bar1 Request Regions failed\n");
6777                         release_mem_region(pci_resource_start(pdev, 0),
6778                                    pci_resource_len(pdev, 0));
6779                         pci_disable_device(pdev);
6780                         return -ENODEV;
6781                 }
6782         }
6783
6784         dev = alloc_etherdev(sizeof(struct s2io_nic));
6785         if (dev == NULL) {
6786                 DBG_PRINT(ERR_DBG, "Device allocation failed\n");
6787                 pci_disable_device(pdev);
6788                 pci_release_regions(pdev);
6789                 return -ENODEV;
6790         }
6791
6792         pci_set_master(pdev);
6793         pci_set_drvdata(pdev, dev);
6794         SET_MODULE_OWNER(dev);
6795         SET_NETDEV_DEV(dev, &pdev->dev);
6796
6797         /*  Private member variable initialized to s2io NIC structure */
6798         sp = dev->priv;
6799         memset(sp, 0, sizeof(struct s2io_nic));
6800         sp->dev = dev;
6801         sp->pdev = pdev;
6802         sp->high_dma_flag = dma_flag;
6803         sp->device_enabled_once = FALSE;
6804         if (rx_ring_mode == 1)
6805                 sp->rxd_mode = RXD_MODE_1;
6806         if (rx_ring_mode == 2)
6807                 sp->rxd_mode = RXD_MODE_3B;
6808         if (rx_ring_mode == 3)
6809                 sp->rxd_mode = RXD_MODE_3A;
6810
6811         sp->intr_type = dev_intr_type;
6812
6813         if ((pdev->device == PCI_DEVICE_ID_HERC_WIN) ||
6814                 (pdev->device == PCI_DEVICE_ID_HERC_UNI))
6815                 sp->device_type = XFRAME_II_DEVICE;
6816         else
6817                 sp->device_type = XFRAME_I_DEVICE;
6818
6819         sp->lro = lro;
6820
6821         /* Initialize some PCI/PCI-X fields of the NIC. */
6822         s2io_init_pci(sp);
6823
6824         /*
6825          * Setting the device configuration parameters.
6826          * Most of these parameters can be specified by the user during
6827          * module insertion as they are module loadable parameters. If
6828          * these parameters are not not specified during load time, they
6829          * are initialized with default values.
6830          */
6831         mac_control = &sp->mac_control;
6832         config = &sp->config;
6833
6834         /* Tx side parameters. */
6835         config->tx_fifo_num = tx_fifo_num;
6836         for (i = 0; i < MAX_TX_FIFOS; i++) {
6837                 config->tx_cfg[i].fifo_len = tx_fifo_len[i];
6838                 config->tx_cfg[i].fifo_priority = i;
6839         }
6840
6841         /* mapping the QoS priority to the configured fifos */
6842         for (i = 0; i < MAX_TX_FIFOS; i++)
6843                 config->fifo_mapping[i] = fifo_map[config->tx_fifo_num][i];
6844
6845         config->tx_intr_type = TXD_INT_TYPE_UTILZ;
6846         for (i = 0; i < config->tx_fifo_num; i++) {
6847                 config->tx_cfg[i].f_no_snoop =
6848                     (NO_SNOOP_TXD | NO_SNOOP_TXD_BUFFER);
6849                 if (config->tx_cfg[i].fifo_len < 65) {
6850                         config->tx_intr_type = TXD_INT_TYPE_PER_LIST;
6851                         break;
6852                 }
6853         }
6854         /* + 2 because one Txd for skb->data and one Txd for UFO */
6855         config->max_txds = MAX_SKB_FRAGS + 2;
6856
6857         /* Rx side parameters. */
6858         config->rx_ring_num = rx_ring_num;
6859         for (i = 0; i < MAX_RX_RINGS; i++) {
6860                 config->rx_cfg[i].num_rxd = rx_ring_sz[i] *
6861                     (rxd_count[sp->rxd_mode] + 1);
6862                 config->rx_cfg[i].ring_priority = i;
6863         }
6864
6865         for (i = 0; i < rx_ring_num; i++) {
6866                 config->rx_cfg[i].ring_org = RING_ORG_BUFF1;
6867                 config->rx_cfg[i].f_no_snoop =
6868                     (NO_SNOOP_RXD | NO_SNOOP_RXD_BUFFER);
6869         }
6870
6871         /*  Setting Mac Control parameters */
6872         mac_control->rmac_pause_time = rmac_pause_time;
6873         mac_control->mc_pause_threshold_q0q3 = mc_pause_threshold_q0q3;
6874         mac_control->mc_pause_threshold_q4q7 = mc_pause_threshold_q4q7;
6875
6876
6877         /* Initialize Ring buffer parameters. */
6878         for (i = 0; i < config->rx_ring_num; i++)
6879                 atomic_set(&sp->rx_bufs_left[i], 0);
6880
6881         /* Initialize the number of ISRs currently running */
6882         atomic_set(&sp->isr_cnt, 0);
6883
6884         /*  initialize the shared memory used by the NIC and the host */
6885         if (init_shared_mem(sp)) {
6886                 DBG_PRINT(ERR_DBG, "%s: Memory allocation failed\n",
6887                           dev->name);
6888                 ret = -ENOMEM;
6889                 goto mem_alloc_failed;
6890         }
6891
6892         sp->bar0 = ioremap(pci_resource_start(pdev, 0),
6893                                      pci_resource_len(pdev, 0));
6894         if (!sp->bar0) {
6895                 DBG_PRINT(ERR_DBG, "%s: Neterion: cannot remap io mem1\n",
6896                           dev->name);
6897                 ret = -ENOMEM;
6898                 goto bar0_remap_failed;
6899         }
6900
6901         sp->bar1 = ioremap(pci_resource_start(pdev, 2),
6902                                      pci_resource_len(pdev, 2));
6903         if (!sp->bar1) {
6904                 DBG_PRINT(ERR_DBG, "%s: Neterion: cannot remap io mem2\n",
6905                           dev->name);
6906                 ret = -ENOMEM;
6907                 goto bar1_remap_failed;
6908         }
6909
6910         dev->irq = pdev->irq;
6911         dev->base_addr = (unsigned long) sp->bar0;
6912
6913         /* Initializing the BAR1 address as the start of the FIFO pointer. */
6914         for (j = 0; j < MAX_TX_FIFOS; j++) {
6915                 mac_control->tx_FIFO_start[j] = (struct TxFIFO_element __iomem *)
6916                     (sp->bar1 + (j * 0x00020000));
6917         }
6918
6919         /*  Driver entry points */
6920         dev->open = &s2io_open;
6921         dev->stop = &s2io_close;
6922         dev->hard_start_xmit = &s2io_xmit;
6923         dev->get_stats = &s2io_get_stats;
6924         dev->set_multicast_list = &s2io_set_multicast;
6925         dev->do_ioctl = &s2io_ioctl;
6926         dev->change_mtu = &s2io_change_mtu;
6927         SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
6928         dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
6929         dev->vlan_rx_register = s2io_vlan_rx_register;
6930         dev->vlan_rx_kill_vid = (void *)s2io_vlan_rx_kill_vid;
6931
6932         /*
6933          * will use eth_mac_addr() for  dev->set_mac_address
6934          * mac address will be set every time dev->open() is called
6935          */
6936         dev->poll = s2io_poll;
6937         dev->weight = 32;
6938
6939 #ifdef CONFIG_NET_POLL_CONTROLLER
6940         dev->poll_controller = s2io_netpoll;
6941 #endif
6942
6943         dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
6944         if (sp->high_dma_flag == TRUE)
6945                 dev->features |= NETIF_F_HIGHDMA;
6946         dev->features |= NETIF_F_TSO;
6947         dev->features |= NETIF_F_TSO6;
6948         if ((sp->device_type & XFRAME_II_DEVICE) && (ufo))  {
6949                 dev->features |= NETIF_F_UFO;
6950                 dev->features |= NETIF_F_HW_CSUM;
6951         }
6952
6953         dev->tx_timeout = &s2io_tx_watchdog;
6954         dev->watchdog_timeo = WATCH_DOG_TIMEOUT;
6955         INIT_WORK(&sp->rst_timer_task, s2io_restart_nic);
6956         INIT_WORK(&sp->set_link_task, s2io_set_link);
6957
6958         pci_save_state(sp->pdev);
6959
6960         /* Setting swapper control on the NIC, for proper reset operation */
6961         if (s2io_set_swapper(sp)) {
6962                 DBG_PRINT(ERR_DBG, "%s:swapper settings are wrong\n",
6963                           dev->name);
6964                 ret = -EAGAIN;
6965                 goto set_swap_failed;
6966         }
6967
6968         /* Verify if the Herc works on the slot its placed into */
6969         if (sp->device_type & XFRAME_II_DEVICE) {
6970                 mode = s2io_verify_pci_mode(sp);
6971                 if (mode < 0) {
6972                         DBG_PRINT(ERR_DBG, "%s: ", __FUNCTION__);
6973                         DBG_PRINT(ERR_DBG, " Unsupported PCI bus mode\n");
6974                         ret = -EBADSLT;
6975                         goto set_swap_failed;
6976                 }
6977         }
6978
6979         /* Not needed for Herc */
6980         if (sp->device_type & XFRAME_I_DEVICE) {
6981                 /*
6982                  * Fix for all "FFs" MAC address problems observed on
6983                  * Alpha platforms
6984                  */
6985                 fix_mac_address(sp);
6986                 s2io_reset(sp);
6987         }
6988
6989         /*
6990          * MAC address initialization.
6991          * For now only one mac address will be read and used.
6992          */
6993         bar0 = sp->bar0;
6994         val64 = RMAC_ADDR_CMD_MEM_RD | RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
6995             RMAC_ADDR_CMD_MEM_OFFSET(0 + MAC_MAC_ADDR_START_OFFSET);
6996         writeq(val64, &bar0->rmac_addr_cmd_mem);
6997         wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
6998                       RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING);
6999         tmp64 = readq(&bar0->rmac_addr_data0_mem);
7000         mac_down = (u32) tmp64;
7001         mac_up = (u32) (tmp64 >> 32);
7002
7003         memset(sp->def_mac_addr[0].mac_addr, 0, sizeof(ETH_ALEN));
7004
7005         sp->def_mac_addr[0].mac_addr[3] = (u8) (mac_up);
7006         sp->def_mac_addr[0].mac_addr[2] = (u8) (mac_up >> 8);
7007         sp->def_mac_addr[0].mac_addr[1] = (u8) (mac_up >> 16);
7008         sp->def_mac_addr[0].mac_addr[0] = (u8) (mac_up >> 24);
7009         sp->def_mac_addr[0].mac_addr[5] = (u8) (mac_down >> 16);
7010         sp->def_mac_addr[0].mac_addr[4] = (u8) (mac_down >> 24);
7011
7012         /*  Set the factory defined MAC address initially   */
7013         dev->addr_len = ETH_ALEN;
7014         memcpy(dev->dev_addr, sp->def_mac_addr, ETH_ALEN);
7015
7016         /* reset Nic and bring it to known state */
7017         s2io_reset(sp);
7018
7019         /*
7020          * Initialize the tasklet status and link state flags
7021          * and the card state parameter
7022          */
7023         atomic_set(&(sp->card_state), 0);
7024         sp->tasklet_status = 0;
7025         sp->link_state = 0;
7026
7027         /* Initialize spinlocks */
7028         spin_lock_init(&sp->tx_lock);
7029
7030         if (!napi)
7031                 spin_lock_init(&sp->put_lock);
7032         spin_lock_init(&sp->rx_lock);
7033
7034         /*
7035          * SXE-002: Configure link and activity LED to init state
7036          * on driver load.
7037          */
7038         subid = sp->pdev->subsystem_device;
7039         if ((subid & 0xFF) >= 0x07) {
7040                 val64 = readq(&bar0->gpio_control);
7041                 val64 |= 0x0000800000000000ULL;
7042                 writeq(val64, &bar0->gpio_control);
7043                 val64 = 0x0411040400000000ULL;
7044                 writeq(val64, (void __iomem *) bar0 + 0x2700);
7045                 val64 = readq(&bar0->gpio_control);
7046         }
7047
7048         sp->rx_csum = 1;        /* Rx chksum verify enabled by default */
7049
7050         if (register_netdev(dev)) {
7051                 DBG_PRINT(ERR_DBG, "Device registration failed\n");
7052                 ret = -ENODEV;
7053                 goto register_failed;
7054         }
7055         s2io_vpd_read(sp);
7056         DBG_PRINT(ERR_DBG, "Copyright(c) 2002-2005 Neterion Inc.\n");
7057         DBG_PRINT(ERR_DBG, "%s: Neterion %s (rev %d)\n",dev->name,
7058                   sp->product_name, get_xena_rev_id(sp->pdev));
7059         DBG_PRINT(ERR_DBG, "%s: Driver version %s\n", dev->name,
7060                   s2io_driver_version);
7061         DBG_PRINT(ERR_DBG, "%s: MAC ADDR: "
7062                           "%02x:%02x:%02x:%02x:%02x:%02x", dev->name,
7063                           sp->def_mac_addr[0].mac_addr[0],
7064                           sp->def_mac_addr[0].mac_addr[1],
7065                           sp->def_mac_addr[0].mac_addr[2],
7066                           sp->def_mac_addr[0].mac_addr[3],
7067                           sp->def_mac_addr[0].mac_addr[4],
7068                           sp->def_mac_addr[0].mac_addr[5]);
7069         DBG_PRINT(ERR_DBG, "SERIAL NUMBER: %s\n", sp->serial_num);
7070         if (sp->device_type & XFRAME_II_DEVICE) {
7071                 mode = s2io_print_pci_mode(sp);
7072                 if (mode < 0) {
7073                         DBG_PRINT(ERR_DBG, " Unsupported PCI bus mode\n");
7074                         ret = -EBADSLT;
7075                         unregister_netdev(dev);
7076                         goto set_swap_failed;
7077                 }
7078         }
7079         switch(sp->rxd_mode) {
7080                 case RXD_MODE_1:
7081                     DBG_PRINT(ERR_DBG, "%s: 1-Buffer receive mode enabled\n",
7082                                                 dev->name);
7083                     break;
7084                 case RXD_MODE_3B:
7085                     DBG_PRINT(ERR_DBG, "%s: 2-Buffer receive mode enabled\n",
7086                                                 dev->name);
7087                     break;
7088                 case RXD_MODE_3A:
7089                     DBG_PRINT(ERR_DBG, "%s: 3-Buffer receive mode enabled\n",
7090                                                 dev->name);
7091                     break;
7092         }
7093
7094         if (napi)
7095                 DBG_PRINT(ERR_DBG, "%s: NAPI enabled\n", dev->name);
7096         switch(sp->intr_type) {
7097                 case INTA:
7098                     DBG_PRINT(ERR_DBG, "%s: Interrupt type INTA\n", dev->name);
7099                     break;
7100                 case MSI:
7101                     DBG_PRINT(ERR_DBG, "%s: Interrupt type MSI\n", dev->name);
7102                     break;
7103                 case MSI_X:
7104                     DBG_PRINT(ERR_DBG, "%s: Interrupt type MSI-X\n", dev->name);
7105                     break;
7106         }
7107         if (sp->lro)
7108                 DBG_PRINT(ERR_DBG, "%s: Large receive offload enabled\n",
7109                           dev->name);
7110         if (ufo)
7111                 DBG_PRINT(ERR_DBG, "%s: UDP Fragmentation Offload(UFO)"
7112                                         " enabled\n", dev->name);
7113         /* Initialize device name */
7114         sprintf(sp->name, "%s Neterion %s", dev->name, sp->product_name);
7115
7116         /* Initialize bimodal Interrupts */
7117         sp->config.bimodal = bimodal;
7118         if (!(sp->device_type & XFRAME_II_DEVICE) && bimodal) {
7119                 sp->config.bimodal = 0;
7120                 DBG_PRINT(ERR_DBG,"%s:Bimodal intr not supported by Xframe I\n",
7121                         dev->name);
7122         }
7123
7124         /*
7125          * Make Link state as off at this point, when the Link change
7126          * interrupt comes the state will be automatically changed to
7127          * the right state.
7128          */
7129         netif_carrier_off(dev);
7130
7131         return 0;
7132
7133       register_failed:
7134       set_swap_failed:
7135         iounmap(sp->bar1);
7136       bar1_remap_failed:
7137         iounmap(sp->bar0);
7138       bar0_remap_failed:
7139       mem_alloc_failed:
7140         free_shared_mem(sp);
7141         pci_disable_device(pdev);
7142         if (dev_intr_type != MSI_X)
7143                 pci_release_regions(pdev);
7144         else {
7145                 release_mem_region(pci_resource_start(pdev, 0),
7146                         pci_resource_len(pdev, 0));
7147                 release_mem_region(pci_resource_start(pdev, 2),
7148                         pci_resource_len(pdev, 2));
7149         }
7150         pci_set_drvdata(pdev, NULL);
7151         free_netdev(dev);
7152
7153         return ret;
7154 }
7155
7156 /**
7157  * s2io_rem_nic - Free the PCI device
7158  * @pdev: structure containing the PCI related information of the device.
7159  * Description: This function is called by the Pci subsystem to release a
7160  * PCI device and free up all resource held up by the device. This could
7161  * be in response to a Hot plug event or when the driver is to be removed
7162  * from memory.
7163  */
7164
7165 static void __devexit s2io_rem_nic(struct pci_dev *pdev)
7166 {
7167         struct net_device *dev =
7168             (struct net_device *) pci_get_drvdata(pdev);
7169         struct s2io_nic *sp;
7170
7171         if (dev == NULL) {
7172                 DBG_PRINT(ERR_DBG, "Driver Data is NULL!!\n");
7173                 return;
7174         }
7175
7176         sp = dev->priv;
7177         unregister_netdev(dev);
7178
7179         free_shared_mem(sp);
7180         iounmap(sp->bar0);
7181         iounmap(sp->bar1);
7182         if (sp->intr_type != MSI_X)
7183                 pci_release_regions(pdev);
7184         else {
7185                 release_mem_region(pci_resource_start(pdev, 0),
7186                         pci_resource_len(pdev, 0));
7187                 release_mem_region(pci_resource_start(pdev, 2),
7188                         pci_resource_len(pdev, 2));
7189         }
7190         pci_set_drvdata(pdev, NULL);
7191         free_netdev(dev);
7192         pci_disable_device(pdev);
7193 }
7194
7195 /**
7196  * s2io_starter - Entry point for the driver
7197  * Description: This function is the entry point for the driver. It verifies
7198  * the module loadable parameters and initializes PCI configuration space.
7199  */
7200
7201 int __init s2io_starter(void)
7202 {
7203         return pci_register_driver(&s2io_driver);
7204 }
7205
7206 /**
7207  * s2io_closer - Cleanup routine for the driver
7208  * Description: This function is the cleanup routine for the driver. It unregist * ers the driver.
7209  */
7210
7211 static __exit void s2io_closer(void)
7212 {
7213         pci_unregister_driver(&s2io_driver);
7214         DBG_PRINT(INIT_DBG, "cleanup done\n");
7215 }
7216
7217 module_init(s2io_starter);
7218 module_exit(s2io_closer);
7219
7220 static int check_L2_lro_capable(u8 *buffer, struct iphdr **ip,
7221                 struct tcphdr **tcp, struct RxD_t *rxdp)
7222 {
7223         int ip_off;
7224         u8 l2_type = (u8)((rxdp->Control_1 >> 37) & 0x7), ip_len;
7225
7226         if (!(rxdp->Control_1 & RXD_FRAME_PROTO_TCP)) {
7227                 DBG_PRINT(INIT_DBG,"%s: Non-TCP frames not supported for LRO\n",
7228                           __FUNCTION__);
7229                 return -1;
7230         }
7231
7232         /* TODO:
7233          * By default the VLAN field in the MAC is stripped by the card, if this
7234          * feature is turned off in rx_pa_cfg register, then the ip_off field
7235          * has to be shifted by a further 2 bytes
7236          */
7237         switch (l2_type) {
7238                 case 0: /* DIX type */
7239                 case 4: /* DIX type with VLAN */
7240                         ip_off = HEADER_ETHERNET_II_802_3_SIZE;
7241                         break;
7242                 /* LLC, SNAP etc are considered non-mergeable */
7243                 default:
7244                         return -1;
7245         }
7246
7247         *ip = (struct iphdr *)((u8 *)buffer + ip_off);
7248         ip_len = (u8)((*ip)->ihl);
7249         ip_len <<= 2;
7250         *tcp = (struct tcphdr *)((unsigned long)*ip + ip_len);
7251
7252         return 0;
7253 }
7254
7255 static int check_for_socket_match(struct lro *lro, struct iphdr *ip,
7256                                   struct tcphdr *tcp)
7257 {
7258         DBG_PRINT(INFO_DBG,"%s: Been here...\n", __FUNCTION__);
7259         if ((lro->iph->saddr != ip->saddr) || (lro->iph->daddr != ip->daddr) ||
7260            (lro->tcph->source != tcp->source) || (lro->tcph->dest != tcp->dest))
7261                 return -1;
7262         return 0;
7263 }
7264
7265 static inline int get_l4_pyld_length(struct iphdr *ip, struct tcphdr *tcp)
7266 {
7267         return(ntohs(ip->tot_len) - (ip->ihl << 2) - (tcp->doff << 2));
7268 }
7269
7270 static void initiate_new_session(struct lro *lro, u8 *l2h,
7271                      struct iphdr *ip, struct tcphdr *tcp, u32 tcp_pyld_len)
7272 {
7273         DBG_PRINT(INFO_DBG,"%s: Been here...\n", __FUNCTION__);
7274         lro->l2h = l2h;
7275         lro->iph = ip;
7276         lro->tcph = tcp;
7277         lro->tcp_next_seq = tcp_pyld_len + ntohl(tcp->seq);
7278         lro->tcp_ack = ntohl(tcp->ack_seq);
7279         lro->sg_num = 1;
7280         lro->total_len = ntohs(ip->tot_len);
7281         lro->frags_len = 0;
7282         /*
7283          * check if we saw TCP timestamp. Other consistency checks have
7284          * already been done.
7285          */
7286         if (tcp->doff == 8) {
7287                 u32 *ptr;
7288                 ptr = (u32 *)(tcp+1);
7289                 lro->saw_ts = 1;
7290                 lro->cur_tsval = *(ptr+1);
7291                 lro->cur_tsecr = *(ptr+2);
7292         }
7293         lro->in_use = 1;
7294 }
7295
7296 static void update_L3L4_header(struct s2io_nic *sp, struct lro *lro)
7297 {
7298         struct iphdr *ip = lro->iph;
7299         struct tcphdr *tcp = lro->tcph;
7300         __sum16 nchk;
7301         struct stat_block *statinfo = sp->mac_control.stats_info;
7302         DBG_PRINT(INFO_DBG,"%s: Been here...\n", __FUNCTION__);
7303
7304         /* Update L3 header */
7305         ip->tot_len = htons(lro->total_len);
7306         ip->check = 0;
7307         nchk = ip_fast_csum((u8 *)lro->iph, ip->ihl);
7308         ip->check = nchk;
7309
7310         /* Update L4 header */
7311         tcp->ack_seq = lro->tcp_ack;
7312         tcp->window = lro->window;
7313
7314         /* Update tsecr field if this session has timestamps enabled */
7315         if (lro->saw_ts) {
7316                 u32 *ptr = (u32 *)(tcp + 1);
7317                 *(ptr+2) = lro->cur_tsecr;
7318         }
7319
7320         /* Update counters required for calculation of
7321          * average no. of packets aggregated.
7322          */
7323         statinfo->sw_stat.sum_avg_pkts_aggregated += lro->sg_num;
7324         statinfo->sw_stat.num_aggregations++;
7325 }
7326
7327 static void aggregate_new_rx(struct lro *lro, struct iphdr *ip,
7328                 struct tcphdr *tcp, u32 l4_pyld)
7329 {
7330         DBG_PRINT(INFO_DBG,"%s: Been here...\n", __FUNCTION__);
7331         lro->total_len += l4_pyld;
7332         lro->frags_len += l4_pyld;
7333         lro->tcp_next_seq += l4_pyld;
7334         lro->sg_num++;
7335
7336         /* Update ack seq no. and window ad(from this pkt) in LRO object */
7337         lro->tcp_ack = tcp->ack_seq;
7338         lro->window = tcp->window;
7339
7340         if (lro->saw_ts) {
7341                 u32 *ptr;
7342                 /* Update tsecr and tsval from this packet */
7343                 ptr = (u32 *) (tcp + 1);
7344                 lro->cur_tsval = *(ptr + 1);
7345                 lro->cur_tsecr = *(ptr + 2);
7346         }
7347 }
7348
7349 static int verify_l3_l4_lro_capable(struct lro *l_lro, struct iphdr *ip,
7350                                     struct tcphdr *tcp, u32 tcp_pyld_len)
7351 {
7352         u8 *ptr;
7353
7354         DBG_PRINT(INFO_DBG,"%s: Been here...\n", __FUNCTION__);
7355
7356         if (!tcp_pyld_len) {
7357                 /* Runt frame or a pure ack */
7358                 return -1;
7359         }
7360
7361         if (ip->ihl != 5) /* IP has options */
7362                 return -1;
7363
7364         /* If we see CE codepoint in IP header, packet is not mergeable */
7365         if (INET_ECN_is_ce(ipv4_get_dsfield(ip)))
7366                 return -1;
7367
7368         /* If we see ECE or CWR flags in TCP header, packet is not mergeable */
7369         if (tcp->urg || tcp->psh || tcp->rst || tcp->syn || tcp->fin ||
7370                                     tcp->ece || tcp->cwr || !tcp->ack) {
7371                 /*
7372                  * Currently recognize only the ack control word and
7373                  * any other control field being set would result in
7374                  * flushing the LRO session
7375                  */
7376                 return -1;
7377         }
7378
7379         /*
7380          * Allow only one TCP timestamp option. Don't aggregate if
7381          * any other options are detected.
7382          */
7383         if (tcp->doff != 5 && tcp->doff != 8)
7384                 return -1;
7385
7386         if (tcp->doff == 8) {
7387                 ptr = (u8 *)(tcp + 1);
7388                 while (*ptr == TCPOPT_NOP)
7389                         ptr++;
7390                 if (*ptr != TCPOPT_TIMESTAMP || *(ptr+1) != TCPOLEN_TIMESTAMP)
7391                         return -1;
7392
7393                 /* Ensure timestamp value increases monotonically */
7394                 if (l_lro)
7395                         if (l_lro->cur_tsval > *((u32 *)(ptr+2)))
7396                                 return -1;
7397
7398                 /* timestamp echo reply should be non-zero */
7399                 if (*((u32 *)(ptr+6)) == 0)
7400                         return -1;
7401         }
7402
7403         return 0;
7404 }
7405
7406 static int
7407 s2io_club_tcp_session(u8 *buffer, u8 **tcp, u32 *tcp_len, struct lro **lro,
7408                       struct RxD_t *rxdp, struct s2io_nic *sp)
7409 {
7410         struct iphdr *ip;
7411         struct tcphdr *tcph;
7412         int ret = 0, i;
7413
7414         if (!(ret = check_L2_lro_capable(buffer, &ip, (struct tcphdr **)tcp,
7415                                          rxdp))) {
7416                 DBG_PRINT(INFO_DBG,"IP Saddr: %x Daddr: %x\n",
7417                           ip->saddr, ip->daddr);
7418         } else {
7419                 return ret;
7420         }
7421
7422         tcph = (struct tcphdr *)*tcp;
7423         *tcp_len = get_l4_pyld_length(ip, tcph);
7424         for (i=0; i<MAX_LRO_SESSIONS; i++) {
7425                 struct lro *l_lro = &sp->lro0_n[i];
7426                 if (l_lro->in_use) {
7427                         if (check_for_socket_match(l_lro, ip, tcph))
7428                                 continue;
7429                         /* Sock pair matched */
7430                         *lro = l_lro;
7431
7432                         if ((*lro)->tcp_next_seq != ntohl(tcph->seq)) {
7433                                 DBG_PRINT(INFO_DBG, "%s:Out of order. expected "
7434                                           "0x%x, actual 0x%x\n", __FUNCTION__,
7435                                           (*lro)->tcp_next_seq,
7436                                           ntohl(tcph->seq));
7437
7438                                 sp->mac_control.stats_info->
7439                                    sw_stat.outof_sequence_pkts++;
7440                                 ret = 2;
7441                                 break;
7442                         }
7443
7444                         if (!verify_l3_l4_lro_capable(l_lro, ip, tcph,*tcp_len))
7445                                 ret = 1; /* Aggregate */
7446                         else
7447                                 ret = 2; /* Flush both */
7448                         break;
7449                 }
7450         }
7451
7452         if (ret == 0) {
7453                 /* Before searching for available LRO objects,
7454                  * check if the pkt is L3/L4 aggregatable. If not
7455                  * don't create new LRO session. Just send this
7456                  * packet up.
7457                  */
7458                 if (verify_l3_l4_lro_capable(NULL, ip, tcph, *tcp_len)) {
7459                         return 5;
7460                 }
7461
7462                 for (i=0; i<MAX_LRO_SESSIONS; i++) {
7463                         struct lro *l_lro = &sp->lro0_n[i];
7464                         if (!(l_lro->in_use)) {
7465                                 *lro = l_lro;
7466                                 ret = 3; /* Begin anew */
7467                                 break;
7468                         }
7469                 }
7470         }
7471
7472         if (ret == 0) { /* sessions exceeded */
7473                 DBG_PRINT(INFO_DBG,"%s:All LRO sessions already in use\n",
7474                           __FUNCTION__);
7475                 *lro = NULL;
7476                 return ret;
7477         }
7478
7479         switch (ret) {
7480                 case 3:
7481                         initiate_new_session(*lro, buffer, ip, tcph, *tcp_len);
7482                         break;
7483                 case 2:
7484                         update_L3L4_header(sp, *lro);
7485                         break;
7486                 case 1:
7487                         aggregate_new_rx(*lro, ip, tcph, *tcp_len);
7488                         if ((*lro)->sg_num == sp->lro_max_aggr_per_sess) {
7489                                 update_L3L4_header(sp, *lro);
7490                                 ret = 4; /* Flush the LRO */
7491                         }
7492                         break;
7493                 default:
7494                         DBG_PRINT(ERR_DBG,"%s:Dont know, can't say!!\n",
7495                                 __FUNCTION__);
7496                         break;
7497         }
7498
7499         return ret;
7500 }
7501
7502 static void clear_lro_session(struct lro *lro)
7503 {
7504         static u16 lro_struct_size = sizeof(struct lro);
7505
7506         memset(lro, 0, lro_struct_size);
7507 }
7508
7509 static void queue_rx_frame(struct sk_buff *skb)
7510 {
7511         struct net_device *dev = skb->dev;
7512
7513         skb->protocol = eth_type_trans(skb, dev);
7514         if (napi)
7515                 netif_receive_skb(skb);
7516         else
7517                 netif_rx(skb);
7518 }
7519
7520 static void lro_append_pkt(struct s2io_nic *sp, struct lro *lro,
7521                            struct sk_buff *skb,
7522                            u32 tcp_len)
7523 {
7524         struct sk_buff *first = lro->parent;
7525
7526         first->len += tcp_len;
7527         first->data_len = lro->frags_len;
7528         skb_pull(skb, (skb->len - tcp_len));
7529         if (skb_shinfo(first)->frag_list)
7530                 lro->last_frag->next = skb;
7531         else
7532                 skb_shinfo(first)->frag_list = skb;
7533         first->truesize += skb->truesize;
7534         lro->last_frag = skb;
7535         sp->mac_control.stats_info->sw_stat.clubbed_frms_cnt++;
7536         return;
7537 }