drivers/net/atl1/atl1_main.c

   1 /*
   2  * Copyright(c) 2005 - 2006 Attansic Corporation. All rights reserved.
   3  * Copyright(c) 2006 Chris Snook <csnook@redhat.com>
   4  * Copyright(c) 2006 Jay Cliburn <jcliburn@gmail.com>
   5  *
   6  * Derived from Intel e1000 driver
   7  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the Free
  11  * Software Foundation; either version 2 of the License, or (at your option)
  12  * any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  * more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along with
  20  * this program; if not, write to the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22  *
  23  * The full GNU General Public License is included in this distribution in the
  24  * file called COPYING.
  25  *
  26  * Contact Information:
  27  * Xiong Huang <xiong_huang@attansic.com>
  28  * Attansic Technology Corp. 3F 147, Xianzheng 9th Road, Zhubei,
  29  * Xinzhu  302, TAIWAN, REPUBLIC OF CHINA
  30  *
  31  * Chris Snook <csnook@redhat.com>
  32  * Jay Cliburn <jcliburn@gmail.com>
  33  *
  34  * This version is adapted from the Attansic reference driver for
  35  * inclusion in the Linux kernel.  It is currently under heavy development.
  36  * A very incomplete list of things that need to be dealt with:
  37  *
  38  * TODO:
  39  * Fix TSO; tx performance is horrible with TSO enabled.
  40  * Wake on LAN.
  41  * Add more ethtool functions, including set ring parameters.
  42  * Fix abstruse irq enable/disable condition described here:
  43  *      http://marc.theaimsgroup.com/?l=linux-netdev&m=116398508500553&w=2
  44  *
  45  * NEEDS TESTING:
  46  * VLAN
  47  * multicast
  48  * promiscuous mode
  49  * interrupt coalescing
  50  * SMP torture testing
  51  */
  52
  53 #include <linux/types.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/pci.h>
  56 #include <linux/spinlock.h>
  57 #include <linux/slab.h>
  58 #include <linux/string.h>
  59 #include <linux/skbuff.h>
  60 #include <linux/etherdevice.h>
  61 #include <linux/if_vlan.h>
  62 #include <linux/irqreturn.h>
  63 #include <linux/workqueue.h>
  64 #include <linux/timer.h>
  65 #include <linux/jiffies.h>
  66 #include <linux/hardirq.h>
  67 #include <linux/interrupt.h>
  68 #include <linux/irqflags.h>
  69 #include <linux/dma-mapping.h>
  70 #include <linux/net.h>
  71 #include <linux/pm.h>
  72 #include <linux/in.h>
  73 #include <linux/ip.h>
  74 #include <linux/tcp.h>
  75 #include <linux/compiler.h>
  76 #include <linux/delay.h>
  77 #include <linux/mii.h>
  78 #include <net/checksum.h>
  79
  80 #include <asm/atomic.h>
  81 #include <asm/byteorder.h>
  82
  83 #include "atl1.h"
  84
  85 #define DRIVER_VERSION "2.0.7"
  86
  87 char atl1_driver_name[] = "atl1";
  88 static const char atl1_driver_string[] = "Attansic L1 Ethernet Network Driver";
  89 static const char atl1_copyright[] = "Copyright(c) 2005-2006 Attansic Corporation.";
  90 char atl1_driver_version[] = DRIVER_VERSION;
  91
  92 MODULE_AUTHOR
  93     ("Attansic Corporation <xiong_huang@attansic.com>, Chris Snook <csnook@redhat.com>, Jay Cliburn <jcliburn@gmail.com>");
  94 MODULE_DESCRIPTION("Attansic 1000M Ethernet Network Driver");
  95 MODULE_LICENSE("GPL");
  96 MODULE_VERSION(DRIVER_VERSION);
  97
  98 /*
  99  * atl1_pci_tbl - PCI Device ID Table
 100  */
 101 static const struct pci_device_id atl1_pci_tbl[] = {
 102         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1)},
 103         /* required last entry */
 104         {0,}
 105 };
 106
 107 MODULE_DEVICE_TABLE(pci, atl1_pci_tbl);
 108
 109 /*
 110  * atl1_sw_init - Initialize general software structures (struct atl1_adapter)
 111  * @adapter: board private structure to initialize
 112  *
 113  * atl1_sw_init initializes the Adapter private data structure.
 114  * Fields are initialized based on PCI device information and
 115  * OS network device settings (MTU size).
 116  */
 117 static int __devinit atl1_sw_init(struct atl1_adapter *adapter)
 118 {
 119         struct atl1_hw *hw = &adapter->hw;
 120         struct net_device *netdev = adapter->netdev;
 121         struct pci_dev *pdev = adapter->pdev;
 122
 123         /* PCI config space info */
 124         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 125
 126         hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
 127         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
 128
 129         adapter->wol = 0;
 130         adapter->rx_buffer_len = (hw->max_frame_size + 7) & ~7;
 131         adapter->ict = 50000;   /* 100ms */
 132         adapter->link_speed = SPEED_0;  /* hardware init */
 133         adapter->link_duplex = FULL_DUPLEX;
 134
 135         hw->phy_configured = false;
 136         hw->preamble_len = 7;
 137         hw->ipgt = 0x60;
 138         hw->min_ifg = 0x50;
 139         hw->ipgr1 = 0x40;
 140         hw->ipgr2 = 0x60;
 141         hw->max_retry = 0xf;
 142         hw->lcol = 0x37;
 143         hw->jam_ipg = 7;
 144         hw->rfd_burst = 8;
 145         hw->rrd_burst = 8;
 146         hw->rfd_fetch_gap = 1;
 147         hw->rx_jumbo_th = adapter->rx_buffer_len / 8;
 148         hw->rx_jumbo_lkah = 1;
 149         hw->rrd_ret_timer = 16;
 150         hw->tpd_burst = 4;
 151         hw->tpd_fetch_th = 16;
 152         hw->txf_burst = 0x100;
 153         hw->tx_jumbo_task_th = (hw->max_frame_size + 7) >> 3;
 154         hw->tpd_fetch_gap = 1;
 155         hw->rcb_value = atl1_rcb_64;
 156         hw->dma_ord = atl1_dma_ord_enh;
 157         hw->dmar_block = atl1_dma_req_256;
 158         hw->dmaw_block = atl1_dma_req_256;
 159         hw->cmb_rrd = 4;
 160         hw->cmb_tpd = 4;
 161         hw->cmb_rx_timer = 1;   /* about 2us */
 162         hw->cmb_tx_timer = 1;   /* about 2us */
 163         hw->smb_timer = 100000; /* about 200ms */
 164
 165         atomic_set(&adapter->irq_sem, 0);
 166         spin_lock_init(&adapter->lock);
 167         spin_lock_init(&adapter->mb_lock);
 168
 169         return 0;
 170 }
 171
 172 /*
 173  * atl1_setup_mem_resources - allocate Tx / RX descriptor resources
 174  * @adapter: board private structure
 175  *
 176  * Return 0 on success, negative on failure
 177  */
 178 s32 atl1_setup_ring_resources(struct atl1_adapter *adapter)
 179 {
 180         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
 181         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
 182         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
 183         struct atl1_ring_header *ring_header = &adapter->ring_header;
 184         struct pci_dev *pdev = adapter->pdev;
 185         int size;
 186         u8 offset = 0;
 187
 188         size = sizeof(struct atl1_buffer) * (tpd_ring->count + rfd_ring->count);
 189         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 190         if (unlikely(!tpd_ring->buffer_info)) {
 191                 dev_err(&pdev->dev, "kzalloc failed , size = D%d\n", size);
 192                 goto err_nomem;
 193         }
 194         rfd_ring->buffer_info =
 195             (struct atl1_buffer *)(tpd_ring->buffer_info + tpd_ring->count);
 196
 197         /* real ring DMA buffer */
 198         ring_header->size = size = sizeof(struct tx_packet_desc) *
 199                                         tpd_ring->count
 200             + sizeof(struct rx_free_desc) * rfd_ring->count
 201             + sizeof(struct rx_return_desc) * rrd_ring->count
 202             + sizeof(struct coals_msg_block)
 203             + sizeof(struct stats_msg_block)
 204             + 40;               /* "40: for 8 bytes align" huh? -- CHS */
 205
 206         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 207                                                 &ring_header->dma);
 208         if (unlikely(!ring_header->desc)) {
 209                 dev_err(&pdev->dev, "pci_alloc_consistent failed\n");
 210                 goto err_nomem;
 211         }
 212
 213         memset(ring_header->desc, 0, ring_header->size);
 214
 215         /* init TPD ring */
 216         tpd_ring->dma = ring_header->dma;
 217         offset = (tpd_ring->dma & 0x7) ? (8 - (ring_header->dma & 0x7)) : 0;
 218         tpd_ring->dma += offset;
 219         tpd_ring->desc = (u8 *) ring_header->desc + offset;
 220         tpd_ring->size = sizeof(struct tx_packet_desc) * tpd_ring->count;
 221         atomic_set(&tpd_ring->next_to_use, 0);
 222         atomic_set(&tpd_ring->next_to_clean, 0);
 223
 224         /* init RFD ring */
 225         rfd_ring->dma = tpd_ring->dma + tpd_ring->size;
 226         offset = (rfd_ring->dma & 0x7) ? (8 - (rfd_ring->dma & 0x7)) : 0;
 227         rfd_ring->dma += offset;
 228         rfd_ring->desc = (u8 *) tpd_ring->desc + (tpd_ring->size + offset);
 229         rfd_ring->size = sizeof(struct rx_free_desc) * rfd_ring->count;
 230         rfd_ring->next_to_clean = 0;
 231         /* rfd_ring->next_to_use = rfd_ring->count - 1; */
 232         atomic_set(&rfd_ring->next_to_use, 0);
 233
 234         /* init RRD ring */
 235         rrd_ring->dma = rfd_ring->dma + rfd_ring->size;
 236         offset = (rrd_ring->dma & 0x7) ? (8 - (rrd_ring->dma & 0x7)) : 0;
 237         rrd_ring->dma += offset;
 238         rrd_ring->desc = (u8 *) rfd_ring->desc + (rfd_ring->size + offset);
 239         rrd_ring->size = sizeof(struct rx_return_desc) * rrd_ring->count;
 240         rrd_ring->next_to_use = 0;
 241         atomic_set(&rrd_ring->next_to_clean, 0);
 242
 243         /* init CMB */
 244         adapter->cmb.dma = rrd_ring->dma + rrd_ring->size;
 245         offset = (adapter->cmb.dma & 0x7) ? (8 - (adapter->cmb.dma & 0x7)) : 0;
 246         adapter->cmb.dma += offset;
 247         adapter->cmb.cmb =
 248             (struct coals_msg_block *) ((u8 *) rrd_ring->desc +
 249                                    (rrd_ring->size + offset));
 250
 251         /* init SMB */
 252         adapter->smb.dma = adapter->cmb.dma + sizeof(struct coals_msg_block);
 253         offset = (adapter->smb.dma & 0x7) ? (8 - (adapter->smb.dma & 0x7)) : 0;
 254         adapter->smb.dma += offset;
 255         adapter->smb.smb = (struct stats_msg_block *)
 256             ((u8 *) adapter->cmb.cmb + (sizeof(struct coals_msg_block) + offset));
 257
 258         return ATL1_SUCCESS;
 259
 260 err_nomem:
 261         kfree(tpd_ring->buffer_info);
 262         return -ENOMEM;
 263 }
 264
 265 /*
 266  * atl1_irq_enable - Enable default interrupt generation settings
 267  * @adapter: board private structure
 268  */
 269 static void atl1_irq_enable(struct atl1_adapter *adapter)
 270 {
 271         if (likely(!atomic_dec_and_test(&adapter->irq_sem)))
 272                 iowrite32(IMR_NORMAL_MASK, adapter->hw.hw_addr + REG_IMR);
 273 }
 274
 275 static void atl1_clear_phy_int(struct atl1_adapter *adapter)
 276 {
 277         u16 phy_data;
 278         unsigned long flags;
 279
 280         spin_lock_irqsave(&adapter->lock, flags);
 281         atl1_read_phy_reg(&adapter->hw, 19, &phy_data);
 282         spin_unlock_irqrestore(&adapter->lock, flags);
 283 }
 284
 285 static void atl1_inc_smb(struct atl1_adapter *adapter)
 286 {
 287         struct stats_msg_block *smb = adapter->smb.smb;
 288
 289         /* Fill out the OS statistics structure */
 290         adapter->soft_stats.rx_packets += smb->rx_ok;
 291         adapter->soft_stats.tx_packets += smb->tx_ok;
 292         adapter->soft_stats.rx_bytes += smb->rx_byte_cnt;
 293         adapter->soft_stats.tx_bytes += smb->tx_byte_cnt;
 294         adapter->soft_stats.multicast += smb->rx_mcast;
 295         adapter->soft_stats.collisions += (smb->tx_1_col +
 296                                            smb->tx_2_col * 2 +
 297                                            smb->tx_late_col +
 298                                            smb->tx_abort_col *
 299                                            adapter->hw.max_retry);
 300
 301         /* Rx Errors */
 302         adapter->soft_stats.rx_errors += (smb->rx_frag +
 303                                           smb->rx_fcs_err +
 304                                           smb->rx_len_err +
 305                                           smb->rx_sz_ov +
 306                                           smb->rx_rxf_ov +
 307                                           smb->rx_rrd_ov + smb->rx_align_err);
 308         adapter->soft_stats.rx_fifo_errors += smb->rx_rxf_ov;
 309         adapter->soft_stats.rx_length_errors += smb->rx_len_err;
 310         adapter->soft_stats.rx_crc_errors += smb->rx_fcs_err;
 311         adapter->soft_stats.rx_frame_errors += smb->rx_align_err;
 312         adapter->soft_stats.rx_missed_errors += (smb->rx_rrd_ov +
 313                                                  smb->rx_rxf_ov);
 314
 315         adapter->soft_stats.rx_pause += smb->rx_pause;
 316         adapter->soft_stats.rx_rrd_ov += smb->rx_rrd_ov;
 317         adapter->soft_stats.rx_trunc += smb->rx_sz_ov;
 318
 319         /* Tx Errors */
 320         adapter->soft_stats.tx_errors += (smb->tx_late_col +
 321                                           smb->tx_abort_col +
 322                                           smb->tx_underrun + smb->tx_trunc);
 323         adapter->soft_stats.tx_fifo_errors += smb->tx_underrun;
 324         adapter->soft_stats.tx_aborted_errors += smb->tx_abort_col;
 325         adapter->soft_stats.tx_window_errors += smb->tx_late_col;
 326
 327         adapter->soft_stats.excecol += smb->tx_abort_col;
 328         adapter->soft_stats.deffer += smb->tx_defer;
 329         adapter->soft_stats.scc += smb->tx_1_col;
 330         adapter->soft_stats.mcc += smb->tx_2_col;
 331         adapter->soft_stats.latecol += smb->tx_late_col;
 332         adapter->soft_stats.tx_underun += smb->tx_underrun;
 333         adapter->soft_stats.tx_trunc += smb->tx_trunc;
 334         adapter->soft_stats.tx_pause += smb->tx_pause;
 335
 336         adapter->net_stats.rx_packets = adapter->soft_stats.rx_packets;
 337         adapter->net_stats.tx_packets = adapter->soft_stats.tx_packets;
 338         adapter->net_stats.rx_bytes = adapter->soft_stats.rx_bytes;
 339         adapter->net_stats.tx_bytes = adapter->soft_stats.tx_bytes;
 340         adapter->net_stats.multicast = adapter->soft_stats.multicast;
 341         adapter->net_stats.collisions = adapter->soft_stats.collisions;
 342         adapter->net_stats.rx_errors = adapter->soft_stats.rx_errors;
 343         adapter->net_stats.rx_over_errors =
 344             adapter->soft_stats.rx_missed_errors;
 345         adapter->net_stats.rx_length_errors =
 346             adapter->soft_stats.rx_length_errors;
 347         adapter->net_stats.rx_crc_errors = adapter->soft_stats.rx_crc_errors;
 348         adapter->net_stats.rx_frame_errors =
 349             adapter->soft_stats.rx_frame_errors;
 350         adapter->net_stats.rx_fifo_errors = adapter->soft_stats.rx_fifo_errors;
 351         adapter->net_stats.rx_missed_errors =
 352             adapter->soft_stats.rx_missed_errors;
 353         adapter->net_stats.tx_errors = adapter->soft_stats.tx_errors;
 354         adapter->net_stats.tx_fifo_errors = adapter->soft_stats.tx_fifo_errors;
 355         adapter->net_stats.tx_aborted_errors =
 356             adapter->soft_stats.tx_aborted_errors;
 357         adapter->net_stats.tx_window_errors =
 358             adapter->soft_stats.tx_window_errors;
 359         adapter->net_stats.tx_carrier_errors =
 360             adapter->soft_stats.tx_carrier_errors;
 361 }
 362
 363 static void atl1_rx_checksum(struct atl1_adapter *adapter,
 364                                         struct rx_return_desc *rrd,
 365                                         struct sk_buff *skb)
 366 {
 367         skb->ip_summed = CHECKSUM_NONE;
 368
 369         if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
 370                 if (rrd->err_flg & (ERR_FLAG_CRC | ERR_FLAG_TRUNC |
 371                                         ERR_FLAG_CODE | ERR_FLAG_OV)) {
 372                         adapter->hw_csum_err++;
 373                         dev_dbg(&adapter->pdev->dev, "rx checksum error\n");
 374                         return;
 375                 }
 376         }
 377
 378         /* not IPv4 */
 379         if (!(rrd->pkt_flg & PACKET_FLAG_IPV4))
 380                 /* checksum is invalid, but it's not an IPv4 pkt, so ok */
 381                 return;
 382
 383         /* IPv4 packet */
 384         if (likely(!(rrd->err_flg &
 385                 (ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM)))) {
 386                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 387                 adapter->hw_csum_good++;
 388                 return;
 389         }
 390
 391         /* IPv4, but hardware thinks its checksum is wrong */
 392         dev_dbg(&adapter->pdev->dev,
 393                 "hw csum wrong, pkt_flag:%x, err_flag:%x\n",
 394                 rrd->pkt_flg, rrd->err_flg);
 395         skb->ip_summed = CHECKSUM_COMPLETE;
 396         skb->csum = htons(rrd->xsz.xsum_sz.rx_chksum);
 397         adapter->hw_csum_err++;
 398         return;
 399 }
 400
 401 /*
 402  * atl1_alloc_rx_buffers - Replace used receive buffers
 403  * @adapter: address of board private structure
 404  */
 405 static u16 atl1_alloc_rx_buffers(struct atl1_adapter *adapter)
 406 {
 407         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
 408         struct pci_dev *pdev = adapter->pdev;
 409         struct page *page;
 410         unsigned long offset;
 411         struct atl1_buffer *buffer_info, *next_info;
 412         struct sk_buff *skb;
 413         u16 num_alloc = 0;
 414         u16 rfd_next_to_use, next_next;
 415         struct rx_free_desc *rfd_desc;
 416
 417         next_next = rfd_next_to_use = atomic_read(&rfd_ring->next_to_use);
 418         if (++next_next == rfd_ring->count)
 419                 next_next = 0;
 420         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
 421         next_info = &rfd_ring->buffer_info[next_next];
 422
 423         while (!buffer_info->alloced && !next_info->alloced) {
 424                 if (buffer_info->skb) {
 425                         buffer_info->alloced = 1;
 426                         goto next;
 427                 }
 428
 429                 rfd_desc = ATL1_RFD_DESC(rfd_ring, rfd_next_to_use);
 430
 431                 skb = dev_alloc_skb(adapter->rx_buffer_len + NET_IP_ALIGN);
 432                 if (unlikely(!skb)) {   /* Better luck next round */
 433                         adapter->net_stats.rx_dropped++;
 434                         break;
 435                 }
 436
 437                 /*
 438                  * Make buffer alignment 2 beyond a 16 byte boundary
 439                  * this will result in a 16 byte aligned IP header after
 440                  * the 14 byte MAC header is removed
 441                  */
 442                 skb_reserve(skb, NET_IP_ALIGN);
 443
 444                 buffer_info->alloced = 1;
 445                 buffer_info->skb = skb;
 446                 buffer_info->length = (u16) adapter->rx_buffer_len;
 447                 page = virt_to_page(skb->data);
 448                 offset = (unsigned long)skb->data & ~PAGE_MASK;
 449                 buffer_info->dma = pci_map_page(pdev, page, offset,
 450                                                 adapter->rx_buffer_len,
 451                                                 PCI_DMA_FROMDEVICE);
 452                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
 453                 rfd_desc->buf_len = cpu_to_le16(adapter->rx_buffer_len);
 454                 rfd_desc->coalese = 0;
 455
 456 next:
 457                 rfd_next_to_use = next_next;
 458                 if (unlikely(++next_next == rfd_ring->count))
 459                         next_next = 0;
 460
 461                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
 462                 next_info = &rfd_ring->buffer_info[next_next];
 463                 num_alloc++;
 464         }
 465
 466         if (num_alloc) {
 467                 /*
 468                  * Force memory writes to complete before letting h/w
 469                  * know there are new descriptors to fetch.  (Only
 470                  * applicable for weak-ordered memory model archs,
 471                  * such as IA-64).
 472                  */
 473                 wmb();
 474                 atomic_set(&rfd_ring->next_to_use, (int)rfd_next_to_use);
 475         }
 476         return num_alloc;
 477 }
 478
 479 static void atl1_intr_rx(struct atl1_adapter *adapter)
 480 {
 481         int i, count;
 482         u16 length;
 483         u16 rrd_next_to_clean;
 484         u32 value;
 485         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
 486         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
 487         struct atl1_buffer *buffer_info;
 488         struct rx_return_desc *rrd;
 489         struct sk_buff *skb;
 490
 491         count = 0;
 492
 493         rrd_next_to_clean = atomic_read(&rrd_ring->next_to_clean);
 494
 495         while (1) {
 496                 rrd = ATL1_RRD_DESC(rrd_ring, rrd_next_to_clean);
 497                 i = 1;
 498                 if (likely(rrd->xsz.valid)) {   /* packet valid */
 499 chk_rrd:
 500                         /* check rrd status */
 501                         if (likely(rrd->num_buf == 1))
 502                                 goto rrd_ok;
 503
 504                         /* rrd seems to be bad */
 505                         if (unlikely(i-- > 0)) {
 506                                 /* rrd may not be DMAed completely */
 507                                 dev_dbg(&adapter->pdev->dev,
 508                                         "incomplete RRD DMA transfer\n");
 509                                 udelay(1);
 510                                 goto chk_rrd;
 511                         }
 512                         /* bad rrd */
 513                         dev_dbg(&adapter->pdev->dev, "bad RRD\n");
 514                         /* see if update RFD index */
 515                         if (rrd->num_buf > 1) {
 516                                 u16 num_buf;
 517                                 num_buf =
 518                                     (rrd->xsz.xsum_sz.pkt_size +
 519                                      adapter->rx_buffer_len -
 520                                      1) / adapter->rx_buffer_len;
 521                                 if (rrd->num_buf == num_buf) {
 522                                         /* clean alloc flag for bad rrd */
 523                                         while (rfd_ring->next_to_clean !=
 524                                                (rrd->buf_indx + num_buf)) {
 525                                                 rfd_ring->buffer_info[rfd_ring->
 526                                                                       next_to_clean].alloced = 0;
 527                                                 if (++rfd_ring->next_to_clean ==
 528                                                     rfd_ring->count) {
 529                                                         rfd_ring->
 530                                                             next_to_clean = 0;
 531                                                 }
 532                                         }
 533                                 }
 534                         }
 535
 536                         /* update rrd */
 537                         rrd->xsz.valid = 0;
 538                         if (++rrd_next_to_clean == rrd_ring->count)
 539                                 rrd_next_to_clean = 0;
 540                         count++;
 541                         continue;
 542                 } else {        /* current rrd still not be updated */
 543
 544                         break;
 545                 }
 546 rrd_ok:
 547                 /* clean alloc flag for bad rrd */
 548                 while (rfd_ring->next_to_clean != rrd->buf_indx) {
 549                         rfd_ring->buffer_info[rfd_ring->next_to_clean].alloced =
 550                             0;
 551                         if (++rfd_ring->next_to_clean == rfd_ring->count)
 552                                 rfd_ring->next_to_clean = 0;
 553                 }
 554
 555                 buffer_info = &rfd_ring->buffer_info[rrd->buf_indx];
 556                 if (++rfd_ring->next_to_clean == rfd_ring->count)
 557                         rfd_ring->next_to_clean = 0;
 558
 559                 /* update rrd next to clean */
 560                 if (++rrd_next_to_clean == rrd_ring->count)
 561                         rrd_next_to_clean = 0;
 562                 count++;
 563
 564                 if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
 565                         if (!(rrd->err_flg &
 566                                 (ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM
 567                                 | ERR_FLAG_LEN))) {
 568                                 /* packet error, don't need upstream */
 569                                 buffer_info->alloced = 0;
 570                                 rrd->xsz.valid = 0;
 571                                 continue;
 572                         }
 573                 }
 574
 575                 /* Good Receive */
 576                 pci_unmap_page(adapter->pdev, buffer_info->dma,
 577                                buffer_info->length, PCI_DMA_FROMDEVICE);
 578                 skb = buffer_info->skb;
 579                 length = le16_to_cpu(rrd->xsz.xsum_sz.pkt_size);
 580
 581                 skb_put(skb, length - ETHERNET_FCS_SIZE);
 582
 583                 /* Receive Checksum Offload */
 584                 atl1_rx_checksum(adapter, rrd, skb);
 585                 skb->protocol = eth_type_trans(skb, adapter->netdev);
 586
 587                 if (adapter->vlgrp && (rrd->pkt_flg & PACKET_FLAG_VLAN_INS)) {
 588                         u16 vlan_tag = (rrd->vlan_tag >> 4) |
 589                                         ((rrd->vlan_tag & 7) << 13) |
 590                                         ((rrd->vlan_tag & 8) << 9);
 591                         vlan_hwaccel_rx(skb, adapter->vlgrp, vlan_tag);
 592                 } else
 593                         netif_rx(skb);
 594
 595                 /* let protocol layer free skb */
 596                 buffer_info->skb = NULL;
 597                 buffer_info->alloced = 0;
 598                 rrd->xsz.valid = 0;
 599
 600                 adapter->netdev->last_rx = jiffies;
 601         }
 602
 603         atomic_set(&rrd_ring->next_to_clean, rrd_next_to_clean);
 604
 605         atl1_alloc_rx_buffers(adapter);
 606
 607         /* update mailbox ? */
 608         if (count) {
 609                 u32 tpd_next_to_use;
 610                 u32 rfd_next_to_use;
 611                 u32 rrd_next_to_clean;
 612
 613                 spin_lock(&adapter->mb_lock);
 614
 615                 tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
 616                 rfd_next_to_use =
 617                     atomic_read(&adapter->rfd_ring.next_to_use);
 618                 rrd_next_to_clean =
 619                     atomic_read(&adapter->rrd_ring.next_to_clean);
 620                 value = ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
 621                         MB_RFD_PROD_INDX_SHIFT) |
 622                         ((rrd_next_to_clean & MB_RRD_CONS_INDX_MASK) <<
 623                         MB_RRD_CONS_INDX_SHIFT) |
 624                         ((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
 625                         MB_TPD_PROD_INDX_SHIFT);
 626                 iowrite32(value, adapter->hw.hw_addr + REG_MAILBOX);
 627                 spin_unlock(&adapter->mb_lock);
 628         }
 629 }
 630
 631 static void atl1_intr_tx(struct atl1_adapter *adapter)
 632 {
 633         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
 634         struct atl1_buffer *buffer_info;
 635         u16 sw_tpd_next_to_clean;
 636         u16 cmb_tpd_next_to_clean;
 637
 638         sw_tpd_next_to_clean = atomic_read(&tpd_ring->next_to_clean);
 639         cmb_tpd_next_to_clean = le16_to_cpu(adapter->cmb.cmb->tpd_cons_idx);
 640
 641         while (cmb_tpd_next_to_clean != sw_tpd_next_to_clean) {
 642                 struct tx_packet_desc *tpd;
 643
 644                 tpd = ATL1_TPD_DESC(tpd_ring, sw_tpd_next_to_clean);
 645                 buffer_info = &tpd_ring->buffer_info[sw_tpd_next_to_clean];
 646                 if (buffer_info->dma) {
 647                         pci_unmap_page(adapter->pdev, buffer_info->dma,
 648                                        buffer_info->length, PCI_DMA_TODEVICE);
 649                         buffer_info->dma = 0;
 650                 }
 651
 652                 if (buffer_info->skb) {
 653                         dev_kfree_skb_irq(buffer_info->skb);
 654                         buffer_info->skb = NULL;
 655                 }
 656                 tpd->buffer_addr = 0;
 657                 tpd->desc.data = 0;
 658
 659                 if (++sw_tpd_next_to_clean == tpd_ring->count)
 660                         sw_tpd_next_to_clean = 0;
 661         }
 662         atomic_set(&tpd_ring->next_to_clean, sw_tpd_next_to_clean);
 663
 664         if (netif_queue_stopped(adapter->netdev)
 665             && netif_carrier_ok(adapter->netdev))
 666                 netif_wake_queue(adapter->netdev);
 667 }
 668
 669 static void atl1_check_for_link(struct atl1_adapter *adapter)
 670 {
 671         struct net_device *netdev = adapter->netdev;
 672         u16 phy_data = 0;
 673
 674         spin_lock(&adapter->lock);
 675         adapter->phy_timer_pending = false;
 676         atl1_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 677         atl1_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 678         spin_unlock(&adapter->lock);
 679
 680         /* notify upper layer link down ASAP */
 681         if (!(phy_data & BMSR_LSTATUS)) {       /* Link Down */
 682                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 683                         dev_info(&adapter->pdev->dev, "%s link is down\n",
 684                                 netdev->name);
 685                         adapter->link_speed = SPEED_0;
 686                         netif_carrier_off(netdev);
 687                         netif_stop_queue(netdev);
 688                 }
 689         }
 690         schedule_work(&adapter->link_chg_task);
 691 }
 692
 693 /*
 694  * atl1_intr - Interrupt Handler
 695  * @irq: interrupt number
 696  * @data: pointer to a network interface device structure
 697  * @pt_regs: CPU registers structure
 698  */
 699 static irqreturn_t atl1_intr(int irq, void *data)
 700 {
 701         /*struct atl1_adapter *adapter = ((struct net_device *)data)->priv;*/
 702         struct atl1_adapter *adapter = netdev_priv(data);
 703         u32 status;
 704         u8 update_rx;
 705         int max_ints = 10;
 706
 707         status = adapter->cmb.cmb->int_stats;
 708         if (!status)
 709                 return IRQ_NONE;
 710
 711         update_rx = 0;
 712
 713         do {
 714                 /* clear CMB interrupt status at once */
 715                 adapter->cmb.cmb->int_stats = 0;
 716
 717                 if (status & ISR_GPHY)  /* clear phy status */
 718                         atl1_clear_phy_int(adapter);
 719
 720                 /* clear ISR status, and Enable CMB DMA/Disable Interrupt */
 721                 iowrite32(status | ISR_DIS_INT, adapter->hw.hw_addr + REG_ISR);
 722
 723                 /* check if SMB intr */
 724                 if (status & ISR_SMB)
 725                         atl1_inc_smb(adapter);
 726
 727                 /* check if PCIE PHY Link down */
 728                 if (status & ISR_PHY_LINKDOWN) {
 729                         dev_dbg(&adapter->pdev->dev, "pcie phy link down %x\n",
 730                                 status);
 731                         if (netif_running(adapter->netdev)) {   /* reset MAC */
 732                                 iowrite32(0, adapter->hw.hw_addr + REG_IMR);
 733                                 schedule_work(&adapter->pcie_dma_to_rst_task);
 734                                 return IRQ_HANDLED;
 735                         }
 736                 }
 737
 738                 /* check if DMA read/write error ? */
 739                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
 740                         dev_dbg(&adapter->pdev->dev,
 741                                 "pcie DMA r/w error (status = 0x%x)\n",
 742                                 status);
 743                         iowrite32(0, adapter->hw.hw_addr + REG_IMR);
 744                         schedule_work(&adapter->pcie_dma_to_rst_task);
 745                         return IRQ_HANDLED;
 746                 }
 747
 748                 /* link event */
 749                 if (status & ISR_GPHY) {
 750                         adapter->soft_stats.tx_carrier_errors++;
 751                         atl1_check_for_link(adapter);
 752                 }
 753
 754                 /* transmit event */
 755                 if (status & ISR_CMB_TX)
 756                         atl1_intr_tx(adapter);
 757
 758                 /* rx exception */
 759                 if (unlikely(status & (ISR_RXF_OV | ISR_RFD_UNRUN |
 760                         ISR_RRD_OV | ISR_HOST_RFD_UNRUN |
 761                         ISR_HOST_RRD_OV | ISR_CMB_RX))) {
 762                         if (status & (ISR_RXF_OV | ISR_RFD_UNRUN |
 763                                 ISR_RRD_OV | ISR_HOST_RFD_UNRUN |
 764                                 ISR_HOST_RRD_OV))
 765                                 dev_dbg(&adapter->pdev->dev,
 766                                         "rx exception, ISR = 0x%x\n", status);
 767                         atl1_intr_rx(adapter);
 768                 }
 769
 770                 if (--max_ints < 0)
 771                         break;
 772
 773         } while ((status = adapter->cmb.cmb->int_stats));
 774
 775         /* re-enable Interrupt */
 776         iowrite32(ISR_DIS_SMB | ISR_DIS_DMA, adapter->hw.hw_addr + REG_ISR);
 777         return IRQ_HANDLED;
 778 }
 779
 780 /*
 781  * atl1_set_multi - Multicast and Promiscuous mode set
 782  * @netdev: network interface device structure
 783  *
 784  * The set_multi entry point is called whenever the multicast address
 785  * list or the network interface flags are updated.  This routine is
 786  * responsible for configuring the hardware for proper multicast,
 787  * promiscuous mode, and all-multi behavior.
 788  */
 789 static void atl1_set_multi(struct net_device *netdev)
 790 {
 791         struct atl1_adapter *adapter = netdev_priv(netdev);
 792         struct atl1_hw *hw = &adapter->hw;
 793         struct dev_mc_list *mc_ptr;
 794         u32 rctl;
 795         u32 hash_value;
 796
 797         /* Check for Promiscuous and All Multicast modes */
 798         rctl = ioread32(hw->hw_addr + REG_MAC_CTRL);
 799         if (netdev->flags & IFF_PROMISC)
 800                 rctl |= MAC_CTRL_PROMIS_EN;
 801         else if (netdev->flags & IFF_ALLMULTI) {
 802                 rctl |= MAC_CTRL_MC_ALL_EN;
 803                 rctl &= ~MAC_CTRL_PROMIS_EN;
 804         } else
 805                 rctl &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 806
 807         iowrite32(rctl, hw->hw_addr + REG_MAC_CTRL);
 808
 809         /* clear the old settings from the multicast hash table */
 810         iowrite32(0, hw->hw_addr + REG_RX_HASH_TABLE);
 811         iowrite32(0, (hw->hw_addr + REG_RX_HASH_TABLE) + (1 << 2));
 812
 813         /* compute mc addresses' hash value ,and put it into hash table */
 814         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
 815                 hash_value = atl1_hash_mc_addr(hw, mc_ptr->dmi_addr);
 816                 atl1_hash_set(hw, hash_value);
 817         }
 818 }
 819
 820 static void atl1_setup_mac_ctrl(struct atl1_adapter *adapter)
 821 {
 822         u32 value;
 823         struct atl1_hw *hw = &adapter->hw;
 824         struct net_device *netdev = adapter->netdev;
 825         /* Config MAC CTRL Register */
 826         value = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
 827         /* duplex */
 828         if (FULL_DUPLEX == adapter->link_duplex)
 829                 value |= MAC_CTRL_DUPLX;
 830         /* speed */
 831         value |= ((u32) ((SPEED_1000 == adapter->link_speed) ?
 832                          MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
 833                   MAC_CTRL_SPEED_SHIFT);
 834         /* flow control */
 835         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
 836         /* PAD & CRC */
 837         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
 838         /* preamble length */
 839         value |= (((u32) adapter->hw.preamble_len
 840                    & MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
 841         /* vlan */
 842         if (adapter->vlgrp)
 843                 value |= MAC_CTRL_RMV_VLAN;
 844         /* rx checksum
 845            if (adapter->rx_csum)
 846            value |= MAC_CTRL_RX_CHKSUM_EN;
 847          */
 848         /* filter mode */
 849         value |= MAC_CTRL_BC_EN;
 850         if (netdev->flags & IFF_PROMISC)
 851                 value |= MAC_CTRL_PROMIS_EN;
 852         else if (netdev->flags & IFF_ALLMULTI)
 853                 value |= MAC_CTRL_MC_ALL_EN;
 854         /* value |= MAC_CTRL_LOOPBACK; */
 855         iowrite32(value, hw->hw_addr + REG_MAC_CTRL);
 856 }
 857
 858 static u32 atl1_check_link(struct atl1_adapter *adapter)
 859 {
 860         struct atl1_hw *hw = &adapter->hw;
 861         struct net_device *netdev = adapter->netdev;
 862         u32 ret_val;
 863         u16 speed, duplex, phy_data;
 864         int reconfig = 0;
 865
 866         /* MII_BMSR must read twice */
 867         atl1_read_phy_reg(hw, MII_BMSR, &phy_data);
 868         atl1_read_phy_reg(hw, MII_BMSR, &phy_data);
 869         if (!(phy_data & BMSR_LSTATUS)) {       /* link down */
 870                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 871                         dev_info(&adapter->pdev->dev, "link is down\n");
 872                         adapter->link_speed = SPEED_0;
 873                         netif_carrier_off(netdev);
 874                         netif_stop_queue(netdev);
 875                 }
 876                 return ATL1_SUCCESS;
 877         }
 878
 879         /* Link Up */
 880         ret_val = atl1_get_speed_and_duplex(hw, &speed, &duplex);
 881         if (ret_val)
 882                 return ret_val;
 883
 884         switch (hw->media_type) {
 885         case MEDIA_TYPE_1000M_FULL:
 886                 if (speed != SPEED_1000 || duplex != FULL_DUPLEX)
 887                         reconfig = 1;
 888                 break;
 889         case MEDIA_TYPE_100M_FULL:
 890                 if (speed != SPEED_100 || duplex != FULL_DUPLEX)
 891                         reconfig = 1;
 892                 break;
 893         case MEDIA_TYPE_100M_HALF:
 894                 if (speed != SPEED_100 || duplex != HALF_DUPLEX)
 895                         reconfig = 1;
 896                 break;
 897         case MEDIA_TYPE_10M_FULL:
 898                 if (speed != SPEED_10 || duplex != FULL_DUPLEX)
 899                         reconfig = 1;
 900                 break;
 901         case MEDIA_TYPE_10M_HALF:
 902                 if (speed != SPEED_10 || duplex != HALF_DUPLEX)
 903                         reconfig = 1;
 904                 break;
 905         }
 906
 907         /* link result is our setting */
 908         if (!reconfig) {
 909                 if (adapter->link_speed != speed
 910                     || adapter->link_duplex != duplex) {
 911                         adapter->link_speed = speed;
 912                         adapter->link_duplex = duplex;
 913                         atl1_setup_mac_ctrl(adapter);
 914                         dev_info(&adapter->pdev->dev,
 915                                 "%s link is up %d Mbps %s\n",
 916                                 netdev->name, adapter->link_speed,
 917                                 adapter->link_duplex == FULL_DUPLEX ?
 918                                 "full duplex" : "half duplex");
 919                 }
 920                 if (!netif_carrier_ok(netdev)) {        /* Link down -> Up */
 921                         netif_carrier_on(netdev);
 922                         netif_wake_queue(netdev);
 923                 }
 924                 return ATL1_SUCCESS;
 925         }
 926
 927         /* change orignal link status */
 928         if (netif_carrier_ok(netdev)) {
 929                 adapter->link_speed = SPEED_0;
 930                 netif_carrier_off(netdev);
 931                 netif_stop_queue(netdev);
 932         }
 933
 934         if (hw->media_type != MEDIA_TYPE_AUTO_SENSOR &&
 935             hw->media_type != MEDIA_TYPE_1000M_FULL) {
 936                 switch (hw->media_type) {
 937                 case MEDIA_TYPE_100M_FULL:
 938                         phy_data = MII_CR_FULL_DUPLEX | MII_CR_SPEED_100 |
 939                                    MII_CR_RESET;
 940                         break;
 941                 case MEDIA_TYPE_100M_HALF:
 942                         phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
 943                         break;
 944                 case MEDIA_TYPE_10M_FULL:
 945                         phy_data =
 946                             MII_CR_FULL_DUPLEX | MII_CR_SPEED_10 | MII_CR_RESET;
 947                         break;
 948                 default:        /* MEDIA_TYPE_10M_HALF: */
 949                         phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
 950                         break;
 951                 }
 952                 atl1_write_phy_reg(hw, MII_BMCR, phy_data);
 953                 return ATL1_SUCCESS;
 954         }
 955
 956         /* auto-neg, insert timer to re-config phy */
 957         if (!adapter->phy_timer_pending) {
 958                 adapter->phy_timer_pending = true;
 959                 mod_timer(&adapter->phy_config_timer, jiffies + 3 * HZ);
 960         }
 961
 962         return ATL1_SUCCESS;
 963 }
 964
 965 static void set_flow_ctrl_old(struct atl1_adapter *adapter)
 966 {
 967         u32 hi, lo, value;
 968
 969         /* RFD Flow Control */
 970         value = adapter->rfd_ring.count;
 971         hi = value / 16;
 972         if (hi < 2)
 973                 hi = 2;
 974         lo = value * 7 / 8;
 975
 976         value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 977             ((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 978         iowrite32(value, adapter->hw.hw_addr + REG_RXQ_RXF_PAUSE_THRESH);
 979
 980         /* RRD Flow Control */
 981         value = adapter->rrd_ring.count;
 982         lo = value / 16;
 983         hi = value * 7 / 8;
 984         if (lo < 2)
 985                 lo = 2;
 986         value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
 987             ((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
 988         iowrite32(value, adapter->hw.hw_addr + REG_RXQ_RRD_PAUSE_THRESH);
 989 }
 990
 991 static void set_flow_ctrl_new(struct atl1_hw *hw)
 992 {
 993         u32 hi, lo, value;
 994
 995         /* RXF Flow Control */
 996         value = ioread32(hw->hw_addr + REG_SRAM_RXF_LEN);
 997         lo = value / 16;
 998         if (lo < 192)
 999                 lo = 192;
1000         hi = value * 7 / 8;
1001         if (hi < lo)
1002                 hi = lo + 16;
1003         value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
1004             ((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
1005         iowrite32(value, hw->hw_addr + REG_RXQ_RXF_PAUSE_THRESH);
1006
1007         /* RRD Flow Control */
1008         value = ioread32(hw->hw_addr + REG_SRAM_RRD_LEN);
1009         lo = value / 8;
1010         hi = value * 7 / 8;
1011         if (lo < 2)
1012                 lo = 2;
1013         if (hi < lo)
1014                 hi = lo + 3;
1015         value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
1016             ((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
1017         iowrite32(value, hw->hw_addr + REG_RXQ_RRD_PAUSE_THRESH);
1018 }
1019
1020 /*
1021  * atl1_configure - Configure Transmit&Receive Unit after Reset
1022  * @adapter: board private structure
1023  *
1024  * Configure the Tx /Rx unit of the MAC after a reset.
1025  */
1026 static u32 atl1_configure(struct atl1_adapter *adapter)
1027 {
1028         struct atl1_hw *hw = &adapter->hw;
1029         u32 value;
1030
1031         /* clear interrupt status */
1032         iowrite32(0xffffffff, adapter->hw.hw_addr + REG_ISR);
1033
1034         /* set MAC Address */
1035         value = (((u32) hw->mac_addr[2]) << 24) |
1036                 (((u32) hw->mac_addr[3]) << 16) |
1037                 (((u32) hw->mac_addr[4]) << 8) |
1038                 (((u32) hw->mac_addr[5]));
1039         iowrite32(value, hw->hw_addr + REG_MAC_STA_ADDR);
1040         value = (((u32) hw->mac_addr[0]) << 8) | (((u32) hw->mac_addr[1]));
1041         iowrite32(value, hw->hw_addr + (REG_MAC_STA_ADDR + 4));
1042
1043         /* tx / rx ring */
1044
1045         /* HI base address */
1046         iowrite32((u32) ((adapter->tpd_ring.dma & 0xffffffff00000000ULL) >> 32),
1047                 hw->hw_addr + REG_DESC_BASE_ADDR_HI);
1048         /* LO base address */
1049         iowrite32((u32) (adapter->rfd_ring.dma & 0x00000000ffffffffULL),
1050                 hw->hw_addr + REG_DESC_RFD_ADDR_LO);
1051         iowrite32((u32) (adapter->rrd_ring.dma & 0x00000000ffffffffULL),
1052                 hw->hw_addr + REG_DESC_RRD_ADDR_LO);
1053         iowrite32((u32) (adapter->tpd_ring.dma & 0x00000000ffffffffULL),
1054                 hw->hw_addr + REG_DESC_TPD_ADDR_LO);
1055         iowrite32((u32) (adapter->cmb.dma & 0x00000000ffffffffULL),
1056                 hw->hw_addr + REG_DESC_CMB_ADDR_LO);
1057         iowrite32((u32) (adapter->smb.dma & 0x00000000ffffffffULL),
1058                 hw->hw_addr + REG_DESC_SMB_ADDR_LO);
1059
1060         /* element count */
1061         value = adapter->rrd_ring.count;
1062         value <<= 16;
1063         value += adapter->rfd_ring.count;
1064         iowrite32(value, hw->hw_addr + REG_DESC_RFD_RRD_RING_SIZE);
1065         iowrite32(adapter->tpd_ring.count, hw->hw_addr + REG_DESC_TPD_RING_SIZE);
1066
1067         /* Load Ptr */
1068         iowrite32(1, hw->hw_addr + REG_LOAD_PTR);
1069
1070         /* config Mailbox */
1071         value = ((atomic_read(&adapter->tpd_ring.next_to_use)
1072                   & MB_TPD_PROD_INDX_MASK) << MB_TPD_PROD_INDX_SHIFT) |
1073             ((atomic_read(&adapter->rrd_ring.next_to_clean)
1074               & MB_RRD_CONS_INDX_MASK) << MB_RRD_CONS_INDX_SHIFT) |
1075             ((atomic_read(&adapter->rfd_ring.next_to_use)
1076               & MB_RFD_PROD_INDX_MASK) << MB_RFD_PROD_INDX_SHIFT);
1077         iowrite32(value, hw->hw_addr + REG_MAILBOX);
1078
1079         /* config IPG/IFG */
1080         value = (((u32) hw->ipgt & MAC_IPG_IFG_IPGT_MASK)
1081                  << MAC_IPG_IFG_IPGT_SHIFT) |
1082             (((u32) hw->min_ifg & MAC_IPG_IFG_MIFG_MASK)
1083              << MAC_IPG_IFG_MIFG_SHIFT) |
1084             (((u32) hw->ipgr1 & MAC_IPG_IFG_IPGR1_MASK)
1085              << MAC_IPG_IFG_IPGR1_SHIFT) |
1086             (((u32) hw->ipgr2 & MAC_IPG_IFG_IPGR2_MASK)
1087              << MAC_IPG_IFG_IPGR2_SHIFT);
1088         iowrite32(value, hw->hw_addr + REG_MAC_IPG_IFG);
1089
1090         /* config  Half-Duplex Control */
1091         value = ((u32) hw->lcol & MAC_HALF_DUPLX_CTRL_LCOL_MASK) |
1092             (((u32) hw->max_retry & MAC_HALF_DUPLX_CTRL_RETRY_MASK)
1093              << MAC_HALF_DUPLX_CTRL_RETRY_SHIFT) |
1094             MAC_HALF_DUPLX_CTRL_EXC_DEF_EN |
1095             (0xa << MAC_HALF_DUPLX_CTRL_ABEBT_SHIFT) |
1096             (((u32) hw->jam_ipg & MAC_HALF_DUPLX_CTRL_JAMIPG_MASK)
1097              << MAC_HALF_DUPLX_CTRL_JAMIPG_SHIFT);
1098         iowrite32(value, hw->hw_addr + REG_MAC_HALF_DUPLX_CTRL);
1099
1100         /* set Interrupt Moderator Timer */
1101         iowrite16(adapter->imt, hw->hw_addr + REG_IRQ_MODU_TIMER_INIT);
1102         iowrite32(MASTER_CTRL_ITIMER_EN, hw->hw_addr + REG_MASTER_CTRL);
1103
1104         /* set Interrupt Clear Timer */
1105         iowrite16(adapter->ict, hw->hw_addr + REG_CMBDISDMA_TIMER);
1106
1107         /* set MTU, 4 : VLAN */
1108         iowrite32(hw->max_frame_size + 4, hw->hw_addr + REG_MTU);
1109
1110         /* jumbo size & rrd retirement timer */
1111         value = (((u32) hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK)
1112                  << RXQ_JMBOSZ_TH_SHIFT) |
1113             (((u32) hw->rx_jumbo_lkah & RXQ_JMBO_LKAH_MASK)
1114              << RXQ_JMBO_LKAH_SHIFT) |
1115             (((u32) hw->rrd_ret_timer & RXQ_RRD_TIMER_MASK)
1116              << RXQ_RRD_TIMER_SHIFT);
1117         iowrite32(value, hw->hw_addr + REG_RXQ_JMBOSZ_RRDTIM);
1118
1119         /* Flow Control */
1120         switch (hw->dev_rev) {
1121         case 0x8001:
1122         case 0x9001:
1123         case 0x9002:
1124         case 0x9003:
1125                 set_flow_ctrl_old(adapter);
1126                 break;
1127         default:
1128                 set_flow_ctrl_new(hw);
1129                 break;
1130         }
1131
1132         /* config TXQ */
1133         value = (((u32) hw->tpd_burst & TXQ_CTRL_TPD_BURST_NUM_MASK)
1134                  << TXQ_CTRL_TPD_BURST_NUM_SHIFT) |
1135             (((u32) hw->txf_burst & TXQ_CTRL_TXF_BURST_NUM_MASK)
1136              << TXQ_CTRL_TXF_BURST_NUM_SHIFT) |
1137             (((u32) hw->tpd_fetch_th & TXQ_CTRL_TPD_FETCH_TH_MASK)
1138              << TXQ_CTRL_TPD_FETCH_TH_SHIFT) | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN;
1139         iowrite32(value, hw->hw_addr + REG_TXQ_CTRL);
1140
1141         /* min tpd fetch gap & tx jumbo packet size threshold for taskoffload */
1142         value = (((u32) hw->tx_jumbo_task_th & TX_JUMBO_TASK_TH_MASK)
1143                  << TX_JUMBO_TASK_TH_SHIFT) |
1144             (((u32) hw->tpd_fetch_gap & TX_TPD_MIN_IPG_MASK)
1145              << TX_TPD_MIN_IPG_SHIFT);
1146         iowrite32(value, hw->hw_addr + REG_TX_JUMBO_TASK_TH_TPD_IPG);
1147
1148         /* config RXQ */
1149         value = (((u32) hw->rfd_burst & RXQ_CTRL_RFD_BURST_NUM_MASK)
1150                  << RXQ_CTRL_RFD_BURST_NUM_SHIFT) |
1151             (((u32) hw->rrd_burst & RXQ_CTRL_RRD_BURST_THRESH_MASK)
1152              << RXQ_CTRL_RRD_BURST_THRESH_SHIFT) |
1153             (((u32) hw->rfd_fetch_gap & RXQ_CTRL_RFD_PREF_MIN_IPG_MASK)
1154              << RXQ_CTRL_RFD_PREF_MIN_IPG_SHIFT) |
1155             RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1156         iowrite32(value, hw->hw_addr + REG_RXQ_CTRL);
1157
1158         /* config DMA Engine */
1159         value = ((((u32) hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1160                  << DMA_CTRL_DMAR_BURST_LEN_SHIFT) |
1161             ((((u32) hw->dmaw_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1162              << DMA_CTRL_DMAR_BURST_LEN_SHIFT) |
1163             DMA_CTRL_DMAR_EN | DMA_CTRL_DMAW_EN;
1164         value |= (u32) hw->dma_ord;
1165         if (atl1_rcb_128 == hw->rcb_value)
1166                 value |= DMA_CTRL_RCB_VALUE;
1167         iowrite32(value, hw->hw_addr + REG_DMA_CTRL);
1168
1169         /* config CMB / SMB */
1170         value = hw->cmb_rrd | ((u32) hw->cmb_tpd << 16);
1171         iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TH);
1172         value = hw->cmb_rx_timer | ((u32) hw->cmb_tx_timer << 16);
1173         iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TIMER);
1174         iowrite32(hw->smb_timer, hw->hw_addr + REG_SMB_TIMER);
1175
1176         /* --- enable CMB / SMB */
1177         value = CSMB_CTRL_CMB_EN | CSMB_CTRL_SMB_EN;
1178         iowrite32(value, hw->hw_addr + REG_CSMB_CTRL);
1179
1180         value = ioread32(adapter->hw.hw_addr + REG_ISR);
1181         if (unlikely((value & ISR_PHY_LINKDOWN) != 0))
1182                 value = 1;      /* config failed */
1183         else
1184                 value = 0;
1185
1186         /* clear all interrupt status */
1187         iowrite32(0x3fffffff, adapter->hw.hw_addr + REG_ISR);
1188         iowrite32(0, adapter->hw.hw_addr + REG_ISR);
1189         return value;
1190 }
1191
1192 /*
1193  * atl1_irq_disable - Mask off interrupt generation on the NIC
1194  * @adapter: board private structure
1195  */
1196 static void atl1_irq_disable(struct atl1_adapter *adapter)
1197 {
1198         atomic_inc(&adapter->irq_sem);
1199         iowrite32(0, adapter->hw.hw_addr + REG_IMR);
1200         ioread32(adapter->hw.hw_addr + REG_IMR);
1201         synchronize_irq(adapter->pdev->irq);
1202 }
1203
1204 static void atl1_vlan_rx_register(struct net_device *netdev,
1205                                 struct vlan_group *grp)
1206 {
1207         struct atl1_adapter *adapter = netdev_priv(netdev);
1208         unsigned long flags;
1209         u32 ctrl;
1210
1211         spin_lock_irqsave(&adapter->lock, flags);
1212         /* atl1_irq_disable(adapter); */
1213         adapter->vlgrp = grp;
1214
1215         if (grp) {
1216                 /* enable VLAN tag insert/strip */
1217                 ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
1218                 ctrl |= MAC_CTRL_RMV_VLAN;
1219                 iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
1220         } else {
1221                 /* disable VLAN tag insert/strip */
1222                 ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
1223                 ctrl &= ~MAC_CTRL_RMV_VLAN;
1224                 iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
1225         }
1226
1227         /* atl1_irq_enable(adapter); */
1228         spin_unlock_irqrestore(&adapter->lock, flags);
1229 }
1230
1231 static void atl1_restore_vlan(struct atl1_adapter *adapter)
1232 {
1233         atl1_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1234 }
1235
1236 static u16 tpd_avail(struct atl1_tpd_ring *tpd_ring)
1237 {
1238         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1239         u16 next_to_use = atomic_read(&tpd_ring->next_to_use);
1240         return ((next_to_clean >
1241                  next_to_use) ? next_to_clean - next_to_use -
1242                 1 : tpd_ring->count + next_to_clean - next_to_use - 1);
1243 }
1244
1245 static int atl1_tso(struct atl1_adapter *adapter, struct sk_buff *skb,
1246                          struct tso_param *tso)
1247 {
1248         /* We enter this function holding a spinlock. */
1249         u8 ipofst;
1250         int err;
1251
1252         if (skb_shinfo(skb)->gso_size) {
1253                 if (skb_header_cloned(skb)) {
1254                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1255                         if (unlikely(err))
1256                                 return err;
1257                 }
1258
1259                 if (skb->protocol == ntohs(ETH_P_IP)) {
1260                         struct iphdr *iph = ip_hdr(skb);
1261
1262                         iph->tot_len = 0;
1263                         iph->check = 0;
1264                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1265                                                                  iph->daddr, 0,
1266                                                                  IPPROTO_TCP,
1267                                                                  0);
1268                         ipofst = skb_network_offset(skb);
1269                         if (ipofst != ENET_HEADER_SIZE) /* 802.3 frame */
1270                                 tso->tsopl |= 1 << TSO_PARAM_ETHTYPE_SHIFT;
1271
1272                         tso->tsopl |= (iph->ihl &
1273                                 CSUM_PARAM_IPHL_MASK) << CSUM_PARAM_IPHL_SHIFT;
1274                         tso->tsopl |= (tcp_hdrlen(skb) &
1275                                 TSO_PARAM_TCPHDRLEN_MASK) << TSO_PARAM_TCPHDRLEN_SHIFT;
1276                         tso->tsopl |= (skb_shinfo(skb)->gso_size &
1277                                 TSO_PARAM_MSS_MASK) << TSO_PARAM_MSS_SHIFT;
1278                         tso->tsopl |= 1 << TSO_PARAM_IPCKSUM_SHIFT;
1279                         tso->tsopl |= 1 << TSO_PARAM_TCPCKSUM_SHIFT;
1280                         tso->tsopl |= 1 << TSO_PARAM_SEGMENT_SHIFT;
1281                         return true;
1282                 }
1283         }
1284         return false;
1285 }
1286
1287 static int atl1_tx_csum(struct atl1_adapter *adapter, struct sk_buff *skb,
1288                         struct csum_param *csum)
1289 {
1290         u8 css, cso;
1291
1292         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1293                 cso = skb_transport_offset(skb);
1294                 css = cso + skb->csum_offset;
1295                 if (unlikely(cso & 0x1)) {
1296                         dev_dbg(&adapter->pdev->dev,
1297                                 "payload offset not an even number\n");
1298                         return -1;
1299                 }
1300                 csum->csumpl |= (cso & CSUM_PARAM_PLOADOFFSET_MASK) <<
1301                         CSUM_PARAM_PLOADOFFSET_SHIFT;
1302                 csum->csumpl |= (css & CSUM_PARAM_XSUMOFFSET_MASK) <<
1303                         CSUM_PARAM_XSUMOFFSET_SHIFT;
1304                 csum->csumpl |= 1 << CSUM_PARAM_CUSTOMCKSUM_SHIFT;
1305                 return true;
1306         }
1307
1308         return true;
1309 }
1310
1311 static void atl1_tx_map(struct atl1_adapter *adapter,
1312                                 struct sk_buff *skb, bool tcp_seg)
1313 {
1314         /* We enter this function holding a spinlock. */
1315         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1316         struct atl1_buffer *buffer_info;
1317         struct page *page;
1318         int first_buf_len = skb->len;
1319         unsigned long offset;
1320         unsigned int nr_frags;
1321         unsigned int f;
1322         u16 tpd_next_to_use;
1323         u16 proto_hdr_len;
1324         u16 i, m, len12;
1325
1326         first_buf_len -= skb->data_len;
1327         nr_frags = skb_shinfo(skb)->nr_frags;
1328         tpd_next_to_use = atomic_read(&tpd_ring->next_to_use);
1329         buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
1330         if (unlikely(buffer_info->skb))
1331                 BUG();
1332         buffer_info->skb = NULL;        /* put skb in last TPD */
1333
1334         if (tcp_seg) {
1335                 /* TSO/GSO */
1336                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1337                 buffer_info->length = proto_hdr_len;
1338                 page = virt_to_page(skb->data);
1339                 offset = (unsigned long)skb->data & ~PAGE_MASK;
1340                 buffer_info->dma = pci_map_page(adapter->pdev, page,
1341                                                 offset, proto_hdr_len,
1342                                                 PCI_DMA_TODEVICE);
1343
1344                 if (++tpd_next_to_use == tpd_ring->count)
1345                         tpd_next_to_use = 0;
1346
1347                 if (first_buf_len > proto_hdr_len) {
1348                         len12 = first_buf_len - proto_hdr_len;
1349                         m = (len12 + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1350                         for (i = 0; i < m; i++) {
1351                                 buffer_info =
1352                                     &tpd_ring->buffer_info[tpd_next_to_use];
1353                                 buffer_info->skb = NULL;
1354                                 buffer_info->length =
1355                                     (MAX_TX_BUF_LEN >=
1356                                      len12) ? MAX_TX_BUF_LEN : len12;
1357                                 len12 -= buffer_info->length;
1358                                 page = virt_to_page(skb->data +
1359                                                  (proto_hdr_len +
1360                                                   i * MAX_TX_BUF_LEN));
1361                                 offset = (unsigned long)(skb->data +
1362                                                         (proto_hdr_len +
1363                                                         i * MAX_TX_BUF_LEN)) &
1364                                                         ~PAGE_MASK;
1365                                 buffer_info->dma =
1366                                     pci_map_page(adapter->pdev, page, offset,
1367                                                  buffer_info->length,
1368                                                  PCI_DMA_TODEVICE);
1369                                 if (++tpd_next_to_use == tpd_ring->count)
1370                                         tpd_next_to_use = 0;
1371                         }
1372                 }
1373         } else {
1374                 /* not TSO/GSO */
1375                 buffer_info->length = first_buf_len;
1376                 page = virt_to_page(skb->data);
1377                 offset = (unsigned long)skb->data & ~PAGE_MASK;
1378                 buffer_info->dma = pci_map_page(adapter->pdev, page,
1379                                                 offset, first_buf_len,
1380                                                 PCI_DMA_TODEVICE);
1381                 if (++tpd_next_to_use == tpd_ring->count)
1382                         tpd_next_to_use = 0;
1383         }
1384
1385         for (f = 0; f < nr_frags; f++) {
1386                 struct skb_frag_struct *frag;
1387                 u16 lenf, i, m;
1388
1389                 frag = &skb_shinfo(skb)->frags[f];
1390                 lenf = frag->size;
1391
1392                 m = (lenf + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1393                 for (i = 0; i < m; i++) {
1394                         buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
1395                         if (unlikely(buffer_info->skb))
1396                                 BUG();
1397                         buffer_info->skb = NULL;
1398                         buffer_info->length =
1399                             (lenf > MAX_TX_BUF_LEN) ? MAX_TX_BUF_LEN : lenf;
1400                         lenf -= buffer_info->length;
1401                         buffer_info->dma =
1402                             pci_map_page(adapter->pdev, frag->page,
1403                                          frag->page_offset + i * MAX_TX_BUF_LEN,
1404                                          buffer_info->length, PCI_DMA_TODEVICE);
1405
1406                         if (++tpd_next_to_use == tpd_ring->count)
1407                                 tpd_next_to_use = 0;
1408                 }
1409         }
1410
1411         /* last tpd's buffer-info */
1412         buffer_info->skb = skb;
1413 }
1414
1415 static void atl1_tx_queue(struct atl1_adapter *adapter, int count,
1416                                union tpd_descr *descr)
1417 {
1418         /* We enter this function holding a spinlock. */
1419         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1420         int j;
1421         u32 val;
1422         struct atl1_buffer *buffer_info;
1423         struct tx_packet_desc *tpd;
1424         u16 tpd_next_to_use = atomic_read(&tpd_ring->next_to_use);
1425
1426         for (j = 0; j < count; j++) {
1427                 buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
1428                 tpd = ATL1_TPD_DESC(&adapter->tpd_ring, tpd_next_to_use);
1429                 tpd->desc.csum.csumpu = descr->csum.csumpu;
1430                 tpd->desc.csum.csumpl = descr->csum.csumpl;
1431                 tpd->desc.tso.tsopu = descr->tso.tsopu;
1432                 tpd->desc.tso.tsopl = descr->tso.tsopl;
1433                 tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1434                 tpd->desc.data = descr->data;
1435                 tpd->desc.csum.csumpu |= (cpu_to_le16(buffer_info->length) &
1436                         CSUM_PARAM_BUFLEN_MASK) << CSUM_PARAM_BUFLEN_SHIFT;
1437
1438                 val = (descr->tso.tsopl >> TSO_PARAM_SEGMENT_SHIFT) &
1439                         TSO_PARAM_SEGMENT_MASK;
1440                 if (val && !j)
1441                         tpd->desc.tso.tsopl |= 1 << TSO_PARAM_HDRFLAG_SHIFT;
1442
1443                 if (j == (count - 1))
1444                         tpd->desc.csum.csumpl |= 1 << CSUM_PARAM_EOP_SHIFT;
1445
1446                 if (++tpd_next_to_use == tpd_ring->count)
1447                         tpd_next_to_use = 0;
1448         }
1449         /*
1450          * Force memory writes to complete before letting h/w
1451          * know there are new descriptors to fetch.  (Only
1452          * applicable for weak-ordered memory model archs,
1453          * such as IA-64).
1454          */
1455         wmb();
1456
1457         atomic_set(&tpd_ring->next_to_use, (int)tpd_next_to_use);
1458 }
1459
1460 static void atl1_update_mailbox(struct atl1_adapter *adapter)
1461 {
1462         unsigned long flags;
1463         u32 tpd_next_to_use;
1464         u32 rfd_next_to_use;
1465         u32 rrd_next_to_clean;
1466         u32 value;
1467
1468         spin_lock_irqsave(&adapter->mb_lock, flags);
1469
1470         tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
1471         rfd_next_to_use = atomic_read(&adapter->rfd_ring.next_to_use);
1472         rrd_next_to_clean = atomic_read(&adapter->rrd_ring.next_to_clean);
1473
1474         value = ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
1475                 MB_RFD_PROD_INDX_SHIFT) |
1476                 ((rrd_next_to_clean & MB_RRD_CONS_INDX_MASK) <<
1477                 MB_RRD_CONS_INDX_SHIFT) |
1478                 ((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
1479                 MB_TPD_PROD_INDX_SHIFT);
1480         iowrite32(value, adapter->hw.hw_addr + REG_MAILBOX);
1481
1482         spin_unlock_irqrestore(&adapter->mb_lock, flags);
1483 }
1484
1485 static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1486 {
1487         struct atl1_adapter *adapter = netdev_priv(netdev);
1488         int len = skb->len;
1489         int tso;
1490         int count = 1;
1491         int ret_val;
1492         u32 val;
1493         union tpd_descr param;
1494         u16 frag_size;
1495         u16 vlan_tag;
1496         unsigned long flags;
1497         unsigned int nr_frags = 0;
1498         unsigned int mss = 0;
1499         unsigned int f;
1500         unsigned int proto_hdr_len;
1501
1502         len -= skb->data_len;
1503
1504         if (unlikely(skb->len == 0)) {
1505                 dev_kfree_skb_any(skb);
1506                 return NETDEV_TX_OK;
1507         }
1508
1509         param.data = 0;
1510         param.tso.tsopu = 0;
1511         param.tso.tsopl = 0;
1512         param.csum.csumpu = 0;
1513         param.csum.csumpl = 0;
1514
1515         /* nr_frags will be nonzero if we're doing scatter/gather (SG) */
1516         nr_frags = skb_shinfo(skb)->nr_frags;
1517         for (f = 0; f < nr_frags; f++) {
1518                 frag_size = skb_shinfo(skb)->frags[f].size;
1519                 if (frag_size)
1520                         count +=
1521                             (frag_size + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1522         }
1523
1524         /* mss will be nonzero if we're doing segment offload (TSO/GSO) */
1525         mss = skb_shinfo(skb)->gso_size;
1526         if (mss) {
1527                 if (skb->protocol == htons(ETH_P_IP)) {
1528                         proto_hdr_len = (skb_transport_offset(skb) +
1529                                          tcp_hdrlen(skb));
1530                         if (unlikely(proto_hdr_len > len)) {
1531                                 dev_kfree_skb_any(skb);
1532                                 return NETDEV_TX_OK;
1533                         }
1534                         /* need additional TPD ? */
1535                         if (proto_hdr_len != len)
1536                                 count += (len - proto_hdr_len +
1537                                         MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1538                 }
1539         }
1540
1541         local_irq_save(flags);
1542         if (!spin_trylock(&adapter->lock)) {
1543                 /* Can't get lock - tell upper layer to requeue */
1544                 local_irq_restore(flags);
1545                 dev_dbg(&adapter->pdev->dev, "tx locked\n");
1546                 return NETDEV_TX_LOCKED;
1547         }
1548
1549         if (tpd_avail(&adapter->tpd_ring) < count) {
1550                 /* not enough descriptors */
1551                 netif_stop_queue(netdev);
1552                 spin_unlock_irqrestore(&adapter->lock, flags);
1553                 dev_dbg(&adapter->pdev->dev, "tx busy\n");
1554                 return NETDEV_TX_BUSY;
1555         }
1556
1557         param.data = 0;
1558
1559         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
1560                 vlan_tag = vlan_tx_tag_get(skb);
1561                 vlan_tag = (vlan_tag << 4) | (vlan_tag >> 13) |
1562                         ((vlan_tag >> 9) & 0x8);
1563                 param.csum.csumpl |= 1 << CSUM_PARAM_INSVLAG_SHIFT;
1564                 param.csum.csumpu |= (vlan_tag & CSUM_PARAM_VALANTAG_MASK) <<
1565                         CSUM_PARAM_VALAN_SHIFT;
1566         }
1567
1568         tso = atl1_tso(adapter, skb, &param.tso);
1569         if (tso < 0) {
1570                 spin_unlock_irqrestore(&adapter->lock, flags);
1571                 dev_kfree_skb_any(skb);
1572                 return NETDEV_TX_OK;
1573         }
1574
1575         if (!tso) {
1576                 ret_val = atl1_tx_csum(adapter, skb, &param.csum);
1577                 if (ret_val < 0) {
1578                         spin_unlock_irqrestore(&adapter->lock, flags);
1579                         dev_kfree_skb_any(skb);
1580                         return NETDEV_TX_OK;
1581                 }
1582         }
1583
1584         val = (param.csum.csumpl >> CSUM_PARAM_SEGMENT_SHIFT) &
1585                 CSUM_PARAM_SEGMENT_MASK;
1586         atl1_tx_map(adapter, skb, 1 == val);
1587         atl1_tx_queue(adapter, count, &param);
1588         netdev->trans_start = jiffies;
1589         spin_unlock_irqrestore(&adapter->lock, flags);
1590         atl1_update_mailbox(adapter);
1591         return NETDEV_TX_OK;
1592 }
1593
1594 /*
1595  * atl1_get_stats - Get System Network Statistics
1596  * @netdev: network interface device structure
1597  *
1598  * Returns the address of the device statistics structure.
1599  * The statistics are actually updated from the timer callback.
1600  */
1601 static struct net_device_stats *atl1_get_stats(struct net_device *netdev)
1602 {
1603         struct atl1_adapter *adapter = netdev_priv(netdev);
1604         return &adapter->net_stats;
1605 }
1606
1607 /*
1608  * atl1_clean_rx_ring - Free RFD Buffers
1609  * @adapter: board private structure
1610  */
1611 static void atl1_clean_rx_ring(struct atl1_adapter *adapter)
1612 {
1613         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1614         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1615         struct atl1_buffer *buffer_info;
1616         struct pci_dev *pdev = adapter->pdev;
1617         unsigned long size;
1618         unsigned int i;
1619
1620         /* Free all the Rx ring sk_buffs */
1621         for (i = 0; i < rfd_ring->count; i++) {
1622                 buffer_info = &rfd_ring->buffer_info[i];
1623                 if (buffer_info->dma) {
1624                         pci_unmap_page(pdev,
1625                                         buffer_info->dma,
1626                                         buffer_info->length,
1627                                         PCI_DMA_FROMDEVICE);
1628                         buffer_info->dma = 0;
1629                 }
1630                 if (buffer_info->skb) {
1631                         dev_kfree_skb(buffer_info->skb);
1632                         buffer_info->skb = NULL;
1633                 }
1634         }
1635
1636         size = sizeof(struct atl1_buffer) * rfd_ring->count;
1637         memset(rfd_ring->buffer_info, 0, size);
1638
1639         /* Zero out the descriptor ring */
1640         memset(rfd_ring->desc, 0, rfd_ring->size);
1641
1642         rfd_ring->next_to_clean = 0;
1643         atomic_set(&rfd_ring->next_to_use, 0);
1644
1645         rrd_ring->next_to_use = 0;
1646         atomic_set(&rrd_ring->next_to_clean, 0);
1647 }
1648
1649 /*
1650  * atl1_clean_tx_ring - Free Tx Buffers
1651  * @adapter: board private structure
1652  */
1653 static void atl1_clean_tx_ring(struct atl1_adapter *adapter)
1654 {
1655         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1656         struct atl1_buffer *buffer_info;
1657         struct pci_dev *pdev = adapter->pdev;
1658         unsigned long size;
1659         unsigned int i;
1660
1661         /* Free all the Tx ring sk_buffs */
1662         for (i = 0; i < tpd_ring->count; i++) {
1663                 buffer_info = &tpd_ring->buffer_info[i];
1664                 if (buffer_info->dma) {
1665                         pci_unmap_page(pdev, buffer_info->dma,
1666                                        buffer_info->length, PCI_DMA_TODEVICE);
1667                         buffer_info->dma = 0;
1668                 }
1669         }
1670
1671         for (i = 0; i < tpd_ring->count; i++) {
1672                 buffer_info = &tpd_ring->buffer_info[i];
1673                 if (buffer_info->skb) {
1674                         dev_kfree_skb_any(buffer_info->skb);
1675                         buffer_info->skb = NULL;
1676                 }
1677         }
1678
1679         size = sizeof(struct atl1_buffer) * tpd_ring->count;
1680         memset(tpd_ring->buffer_info, 0, size);
1681
1682         /* Zero out the descriptor ring */
1683         memset(tpd_ring->desc, 0, tpd_ring->size);
1684
1685         atomic_set(&tpd_ring->next_to_use, 0);
1686         atomic_set(&tpd_ring->next_to_clean, 0);
1687 }
1688
1689 /*
1690  * atl1_free_ring_resources - Free Tx / RX descriptor Resources
1691  * @adapter: board private structure
1692  *
1693  * Free all transmit software resources
1694  */
1695 void atl1_free_ring_resources(struct atl1_adapter *adapter)
1696 {
1697         struct pci_dev *pdev = adapter->pdev;
1698         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1699         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1700         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1701         struct atl1_ring_header *ring_header = &adapter->ring_header;
1702
1703         atl1_clean_tx_ring(adapter);
1704         atl1_clean_rx_ring(adapter);
1705
1706         kfree(tpd_ring->buffer_info);
1707         pci_free_consistent(pdev, ring_header->size, ring_header->desc,
1708                             ring_header->dma);
1709
1710         tpd_ring->buffer_info = NULL;
1711         tpd_ring->desc = NULL;
1712         tpd_ring->dma = 0;
1713
1714         rfd_ring->buffer_info = NULL;
1715         rfd_ring->desc = NULL;
1716         rfd_ring->dma = 0;
1717
1718         rrd_ring->desc = NULL;
1719         rrd_ring->dma = 0;
1720 }
1721
1722 s32 atl1_up(struct atl1_adapter *adapter)
1723 {
1724         struct net_device *netdev = adapter->netdev;
1725         int err;
1726         int irq_flags = IRQF_SAMPLE_RANDOM;
1727
1728         /* hardware has been reset, we need to reload some things */
1729         atl1_set_multi(netdev);
1730         atl1_restore_vlan(adapter);
1731         err = atl1_alloc_rx_buffers(adapter);
1732         if (unlikely(!err))             /* no RX BUFFER allocated */
1733                 return -ENOMEM;
1734
1735         if (unlikely(atl1_configure(adapter))) {
1736                 err = -EIO;
1737                 goto err_up;
1738         }
1739
1740         err = pci_enable_msi(adapter->pdev);
1741         if (err) {
1742                 dev_info(&adapter->pdev->dev,
1743                         "Unable to enable MSI: %d\n", err);
1744                 irq_flags |= IRQF_SHARED;
1745         }
1746
1747         err = request_irq(adapter->pdev->irq, &atl1_intr, irq_flags,
1748                         netdev->name, netdev);
1749         if (unlikely(err))
1750                 goto err_up;
1751
1752         mod_timer(&adapter->watchdog_timer, jiffies);
1753         atl1_irq_enable(adapter);
1754         atl1_check_link(adapter);
1755         return 0;
1756
1757         /* FIXME: unreachable code! -- CHS */
1758         /* free irq disable any interrupt */
1759         iowrite32(0, adapter->hw.hw_addr + REG_IMR);
1760         free_irq(adapter->pdev->irq, netdev);
1761
1762 err_up:
1763         pci_disable_msi(adapter->pdev);
1764         /* free rx_buffers */
1765         atl1_clean_rx_ring(adapter);
1766         return err;
1767 }
1768
1769 void atl1_down(struct atl1_adapter *adapter)
1770 {
1771         struct net_device *netdev = adapter->netdev;
1772
1773         del_timer_sync(&adapter->watchdog_timer);
1774         del_timer_sync(&adapter->phy_config_timer);
1775         adapter->phy_timer_pending = false;
1776
1777         atl1_irq_disable(adapter);
1778         free_irq(adapter->pdev->irq, netdev);
1779         pci_disable_msi(adapter->pdev);
1780         atl1_reset_hw(&adapter->hw);
1781         adapter->cmb.cmb->int_stats = 0;
1782
1783         adapter->link_speed = SPEED_0;
1784         adapter->link_duplex = -1;
1785         netif_carrier_off(netdev);
1786         netif_stop_queue(netdev);
1787
1788         atl1_clean_tx_ring(adapter);
1789         atl1_clean_rx_ring(adapter);
1790 }
1791
1792 /*
1793  * atl1_change_mtu - Change the Maximum Transfer Unit
1794  * @netdev: network interface device structure
1795  * @new_mtu: new value for maximum frame size
1796  *
1797  * Returns 0 on success, negative on failure
1798  */
1799 static int atl1_change_mtu(struct net_device *netdev, int new_mtu)
1800 {
1801         struct atl1_adapter *adapter = netdev_priv(netdev);
1802         int old_mtu = netdev->mtu;
1803         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1804
1805         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
1806             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
1807                 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
1808                 return -EINVAL;
1809         }
1810
1811         adapter->hw.max_frame_size = max_frame;
1812         adapter->hw.tx_jumbo_task_th = (max_frame + 7) >> 3;
1813         adapter->rx_buffer_len = (max_frame + 7) & ~7;
1814         adapter->hw.rx_jumbo_th = adapter->rx_buffer_len / 8;
1815
1816         netdev->mtu = new_mtu;
1817         if ((old_mtu != new_mtu) && netif_running(netdev)) {
1818                 atl1_down(adapter);
1819                 atl1_up(adapter);
1820         }
1821
1822         return 0;
1823 }
1824
1825 /*
1826  * atl1_set_mac - Change the Ethernet Address of the NIC
1827  * @netdev: network interface device structure
1828  * @p: pointer to an address structure
1829  *
1830  * Returns 0 on success, negative on failure
1831  */
1832 static int atl1_set_mac(struct net_device *netdev, void *p)
1833 {
1834         struct atl1_adapter *adapter = netdev_priv(netdev);
1835         struct sockaddr *addr = p;
1836
1837         if (netif_running(netdev))
1838                 return -EBUSY;
1839
1840         if (!is_valid_ether_addr(addr->sa_data))
1841                 return -EADDRNOTAVAIL;
1842
1843         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1844         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
1845
1846         atl1_set_mac_addr(&adapter->hw);
1847         return 0;
1848 }
1849
1850 /*
1851  * atl1_watchdog - Timer Call-back
1852  * @data: pointer to netdev cast into an unsigned long
1853  */
1854 static void atl1_watchdog(unsigned long data)
1855 {
1856         struct atl1_adapter *adapter = (struct atl1_adapter *)data;
1857
1858         /* Reset the timer */
1859         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1860 }
1861
1862 static int mdio_read(struct net_device *netdev, int phy_id, int reg_num)
1863 {
1864         struct atl1_adapter *adapter = netdev_priv(netdev);
1865         u16 result;
1866
1867         atl1_read_phy_reg(&adapter->hw, reg_num & 0x1f, &result);
1868
1869         return result;
1870 }
1871
1872 static void mdio_write(struct net_device *netdev, int phy_id, int reg_num, int val)
1873 {
1874         struct atl1_adapter *adapter = netdev_priv(netdev);
1875
1876         atl1_write_phy_reg(&adapter->hw, reg_num, val);
1877 }
1878
1879 /*
1880  * atl1_mii_ioctl -
1881  * @netdev:
1882  * @ifreq:
1883  * @cmd:
1884  */
1885 static int atl1_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1886 {
1887         struct atl1_adapter *adapter = netdev_priv(netdev);
1888         unsigned long flags;
1889         int retval;
1890
1891         if (!netif_running(netdev))
1892                 return -EINVAL;
1893
1894         spin_lock_irqsave(&adapter->lock, flags);
1895         retval = generic_mii_ioctl(&adapter->mii, if_mii(ifr), cmd, NULL);
1896         spin_unlock_irqrestore(&adapter->lock, flags);
1897
1898         return retval;
1899 }
1900
1901 /*
1902  * atl1_ioctl -
1903  * @netdev:
1904  * @ifreq:
1905  * @cmd:
1906  */
1907 static int atl1_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1908 {
1909         switch (cmd) {
1910         case SIOCGMIIPHY:
1911         case SIOCGMIIREG:
1912         case SIOCSMIIREG:
1913                 return atl1_mii_ioctl(netdev, ifr, cmd);
1914         default:
1915                 return -EOPNOTSUPP;
1916         }
1917 }
1918
1919 /*
1920  * atl1_tx_timeout - Respond to a Tx Hang
1921  * @netdev: network interface device structure
1922  */
1923 static void atl1_tx_timeout(struct net_device *netdev)
1924 {
1925         struct atl1_adapter *adapter = netdev_priv(netdev);
1926         /* Do the reset outside of interrupt context */
1927         schedule_work(&adapter->tx_timeout_task);
1928 }
1929
1930 /*
1931  * atl1_phy_config - Timer Call-back
1932  * @data: pointer to netdev cast into an unsigned long
1933  */
1934 static void atl1_phy_config(unsigned long data)
1935 {
1936         struct atl1_adapter *adapter = (struct atl1_adapter *)data;
1937         struct atl1_hw *hw = &adapter->hw;
1938         unsigned long flags;
1939
1940         spin_lock_irqsave(&adapter->lock, flags);
1941         adapter->phy_timer_pending = false;
1942         atl1_write_phy_reg(hw, MII_ADVERTISE, hw->mii_autoneg_adv_reg);
1943         atl1_write_phy_reg(hw, MII_AT001_CR, hw->mii_1000t_ctrl_reg);
1944         atl1_write_phy_reg(hw, MII_BMCR, MII_CR_RESET | MII_CR_AUTO_NEG_EN);
1945         spin_unlock_irqrestore(&adapter->lock, flags);
1946 }
1947
1948 int atl1_reset(struct atl1_adapter *adapter)
1949 {
1950         int ret;
1951
1952         ret = atl1_reset_hw(&adapter->hw);
1953         if (ret != ATL1_SUCCESS)
1954                 return ret;
1955         return atl1_init_hw(&adapter->hw);
1956 }
1957
1958 /*
1959  * atl1_open - Called when a network interface is made active
1960  * @netdev: network interface device structure
1961  *
1962  * Returns 0 on success, negative value on failure
1963  *
1964  * The open entry point is called when a network interface is made
1965  * active by the system (IFF_UP).  At this point all resources needed
1966  * for transmit and receive operations are allocated, the interrupt
1967  * handler is registered with the OS, the watchdog timer is started,
1968  * and the stack is notified that the interface is ready.
1969  */
1970 static int atl1_open(struct net_device *netdev)
1971 {
1972         struct atl1_adapter *adapter = netdev_priv(netdev);
1973         int err;
1974
1975         /* allocate transmit descriptors */
1976         err = atl1_setup_ring_resources(adapter);
1977         if (err)
1978                 return err;
1979
1980         err = atl1_up(adapter);
1981         if (err)
1982                 goto err_up;
1983
1984         return 0;
1985
1986 err_up:
1987         atl1_reset(adapter);
1988         return err;
1989 }
1990
1991 /*
1992  * atl1_close - Disables a network interface
1993  * @netdev: network interface device structure
1994  *
1995  * Returns 0, this is not allowed to fail
1996  *
1997  * The close entry point is called when an interface is de-activated
1998  * by the OS.  The hardware is still under the drivers control, but
1999  * needs to be disabled.  A global MAC reset is issued to stop the
2000  * hardware, and all transmit and receive resources are freed.
2001  */
2002 static int atl1_close(struct net_device *netdev)
2003 {
2004         struct atl1_adapter *adapter = netdev_priv(netdev);
2005         atl1_down(adapter);
2006         atl1_free_ring_resources(adapter);
2007         return 0;
2008 }
2009
2010 #ifdef CONFIG_NET_POLL_CONTROLLER
2011 static void atl1_poll_controller(struct net_device *netdev)
2012 {
2013         disable_irq(netdev->irq);
2014         atl1_intr(netdev->irq, netdev);
2015         enable_irq(netdev->irq);
2016 }
2017 #endif
2018
2019 /*
2020  * If TPD Buffer size equal to 0, PCIE DMAR_TO_INT
2021  * will assert. We do soft reset <0x1400=1> according
2022  * with the SPEC. BUT, it seemes that PCIE or DMA
2023  * state-machine will not be reset. DMAR_TO_INT will
2024  * assert again and again.
2025  */
2026 static void atl1_tx_timeout_task(struct work_struct *work)
2027 {
2028         struct atl1_adapter *adapter =
2029                 container_of(work, struct atl1_adapter, tx_timeout_task);
2030         struct net_device *netdev = adapter->netdev;
2031
2032         netif_device_detach(netdev);
2033         atl1_down(adapter);
2034         atl1_up(adapter);
2035         netif_device_attach(netdev);
2036 }
2037
2038 /*
2039  * atl1_link_chg_task - deal with link change event Out of interrupt context
2040  */
2041 static void atl1_link_chg_task(struct work_struct *work)
2042 {
2043         struct atl1_adapter *adapter =
2044                container_of(work, struct atl1_adapter, link_chg_task);
2045         unsigned long flags;
2046
2047         spin_lock_irqsave(&adapter->lock, flags);
2048         atl1_check_link(adapter);
2049         spin_unlock_irqrestore(&adapter->lock, flags);
2050 }
2051
2052 /*
2053  * atl1_pcie_patch - Patch for PCIE module
2054  */
2055 static void atl1_pcie_patch(struct atl1_adapter *adapter)
2056 {
2057         u32 value;
2058         value = 0x6500;
2059         iowrite32(value, adapter->hw.hw_addr + 0x12FC);
2060         /* pcie flow control mode change */
2061         value = ioread32(adapter->hw.hw_addr + 0x1008);
2062         value |= 0x8000;
2063         iowrite32(value, adapter->hw.hw_addr + 0x1008);
2064 }
2065
2066 /*
2067  * When ACPI resume on some VIA MotherBoard, the Interrupt Disable bit/0x400
2068  * on PCI Command register is disable.
2069  * The function enable this bit.
2070  * Brackett, 2006/03/15
2071  */
2072 static void atl1_via_workaround(struct atl1_adapter *adapter)
2073 {
2074         unsigned long value;
2075
2076         value = ioread16(adapter->hw.hw_addr + PCI_COMMAND);
2077         if (value & PCI_COMMAND_INTX_DISABLE)
2078                 value &= ~PCI_COMMAND_INTX_DISABLE;
2079         iowrite32(value, adapter->hw.hw_addr + PCI_COMMAND);
2080 }
2081
2082 /*
2083  * atl1_probe - Device Initialization Routine
2084  * @pdev: PCI device information struct
2085  * @ent: entry in atl1_pci_tbl
2086  *
2087  * Returns 0 on success, negative on failure
2088  *
2089  * atl1_probe initializes an adapter identified by a pci_dev structure.
2090  * The OS initialization, configuring of the adapter private structure,
2091  * and a hardware reset occur.
2092  */
2093 static int __devinit atl1_probe(struct pci_dev *pdev,
2094                               const struct pci_device_id *ent)
2095 {
2096         struct net_device *netdev;
2097         struct atl1_adapter *adapter;
2098         static int cards_found = 0;
2099         bool pci_using_64 = true;
2100         int err;
2101
2102         err = pci_enable_device(pdev);
2103         if (err)
2104                 return err;
2105
2106         err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
2107         if (err) {
2108                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
2109                 if (err) {
2110                         dev_err(&pdev->dev, "no usable DMA configuration\n");
2111                         goto err_dma;
2112                 }
2113                 pci_using_64 = false;
2114         }
2115         /* Mark all PCI regions associated with PCI device
2116          * pdev as being reserved by owner atl1_driver_name
2117          */
2118         err = pci_request_regions(pdev, atl1_driver_name);
2119         if (err)
2120                 goto err_request_regions;
2121
2122         /* Enables bus-mastering on the device and calls
2123          * pcibios_set_master to do the needed arch specific settings
2124          */
2125         pci_set_master(pdev);
2126
2127         netdev = alloc_etherdev(sizeof(struct atl1_adapter));
2128         if (!netdev) {
2129                 err = -ENOMEM;
2130                 goto err_alloc_etherdev;
2131         }
2132         SET_MODULE_OWNER(netdev);
2133         SET_NETDEV_DEV(netdev, &pdev->dev);
2134
2135         pci_set_drvdata(pdev, netdev);
2136         adapter = netdev_priv(netdev);
2137         adapter->netdev = netdev;
2138         adapter->pdev = pdev;
2139         adapter->hw.back = adapter;
2140
2141         adapter->hw.hw_addr = pci_iomap(pdev, 0, 0);
2142         if (!adapter->hw.hw_addr) {
2143                 err = -EIO;
2144                 goto err_pci_iomap;
2145         }
2146         /* get device revision number */
2147         adapter->hw.dev_rev = ioread16(adapter->hw.hw_addr +
2148                                         (REG_MASTER_CTRL + 2));
2149         dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
2150
2151         /* set default ring resource counts */
2152         adapter->rfd_ring.count = adapter->rrd_ring.count = ATL1_DEFAULT_RFD;
2153         adapter->tpd_ring.count = ATL1_DEFAULT_TPD;
2154
2155         adapter->mii.dev = netdev;
2156         adapter->mii.mdio_read = mdio_read;
2157         adapter->mii.mdio_write = mdio_write;
2158         adapter->mii.phy_id_mask = 0x1f;
2159         adapter->mii.reg_num_mask = 0x1f;
2160
2161         netdev->open = &atl1_open;
2162         netdev->stop = &atl1_close;
2163         netdev->hard_start_xmit = &atl1_xmit_frame;
2164         netdev->get_stats = &atl1_get_stats;
2165         netdev->set_multicast_list = &atl1_set_multi;
2166         netdev->set_mac_address = &atl1_set_mac;
2167         netdev->change_mtu = &atl1_change_mtu;
2168         netdev->do_ioctl = &atl1_ioctl;
2169         netdev->tx_timeout = &atl1_tx_timeout;
2170         netdev->watchdog_timeo = 5 * HZ;
2171 #ifdef CONFIG_NET_POLL_CONTROLLER
2172         netdev->poll_controller = atl1_poll_controller;
2173 #endif
2174         netdev->vlan_rx_register = atl1_vlan_rx_register;
2175
2176         netdev->ethtool_ops = &atl1_ethtool_ops;
2177         adapter->bd_number = cards_found;
2178         adapter->pci_using_64 = pci_using_64;
2179
2180         /* setup the private structure */
2181         err = atl1_sw_init(adapter);
2182         if (err)
2183                 goto err_common;
2184
2185         netdev->features = NETIF_F_HW_CSUM;
2186         netdev->features |= NETIF_F_SG;
2187         netdev->features |= (NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX);
2188
2189         /*
2190          * FIXME - Until tso performance gets fixed, disable the feature.
2191          * Enable it with ethtool -K if desired.
2192          */
2193         /* netdev->features |= NETIF_F_TSO; */
2194
2195         if (pci_using_64)
2196                 netdev->features |= NETIF_F_HIGHDMA;
2197
2198         netdev->features |= NETIF_F_LLTX;
2199
2200         /*
2201          * patch for some L1 of old version,
2202          * the final version of L1 may not need these
2203          * patches
2204          */
2205         /* atl1_pcie_patch(adapter); */
2206
2207         /* really reset GPHY core */
2208         iowrite16(0, adapter->hw.hw_addr + REG_GPHY_ENABLE);
2209
2210         /*
2211          * reset the controller to
2212          * put the device in a known good starting state
2213          */
2214         if (atl1_reset_hw(&adapter->hw)) {
2215                 err = -EIO;
2216                 goto err_common;
2217         }
2218
2219         /* copy the MAC address out of the EEPROM */
2220         atl1_read_mac_addr(&adapter->hw);
2221         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2222
2223         if (!is_valid_ether_addr(netdev->dev_addr)) {
2224                 err = -EIO;
2225                 goto err_common;
2226         }
2227
2228         atl1_check_options(adapter);
2229
2230         /* pre-init the MAC, and setup link */
2231         err = atl1_init_hw(&adapter->hw);
2232         if (err) {
2233                 err = -EIO;
2234                 goto err_common;
2235         }
2236
2237         atl1_pcie_patch(adapter);
2238         /* assume we have no link for now */
2239         netif_carrier_off(netdev);
2240         netif_stop_queue(netdev);
2241
2242         init_timer(&adapter->watchdog_timer);
2243         adapter->watchdog_timer.function = &atl1_watchdog;
2244         adapter->watchdog_timer.data = (unsigned long)adapter;
2245
2246         init_timer(&adapter->phy_config_timer);
2247         adapter->phy_config_timer.function = &atl1_phy_config;
2248         adapter->phy_config_timer.data = (unsigned long)adapter;
2249         adapter->phy_timer_pending = false;
2250
2251         INIT_WORK(&adapter->tx_timeout_task, atl1_tx_timeout_task);
2252
2253         INIT_WORK(&adapter->link_chg_task, atl1_link_chg_task);
2254
2255         INIT_WORK(&adapter->pcie_dma_to_rst_task, atl1_tx_timeout_task);
2256
2257         err = register_netdev(netdev);
2258         if (err)
2259                 goto err_common;
2260
2261         cards_found++;
2262         atl1_via_workaround(adapter);
2263         return 0;
2264
2265 err_common:
2266         pci_iounmap(pdev, adapter->hw.hw_addr);
2267 err_pci_iomap:
2268         free_netdev(netdev);
2269 err_alloc_etherdev:
2270         pci_release_regions(pdev);
2271 err_dma:
2272 err_request_regions:
2273         pci_disable_device(pdev);
2274         return err;
2275 }
2276
2277 /*
2278  * atl1_remove - Device Removal Routine
2279  * @pdev: PCI device information struct
2280  *
2281  * atl1_remove is called by the PCI subsystem to alert the driver
2282  * that it should release a PCI device.  The could be caused by a
2283  * Hot-Plug event, or because the driver is going to be removed from
2284  * memory.
2285  */
2286 static void __devexit atl1_remove(struct pci_dev *pdev)
2287 {
2288         struct net_device *netdev = pci_get_drvdata(pdev);
2289         struct atl1_adapter *adapter;
2290         /* Device not available. Return. */
2291         if (!netdev)
2292                 return;
2293
2294         adapter = netdev_priv(netdev);
2295
2296         /* Some atl1 boards lack persistent storage for their MAC, and get it
2297          * from the BIOS during POST.  If we've been messing with the MAC
2298          * address, we need to save the permanent one.
2299          */
2300         if (memcmp(adapter->hw.mac_addr, adapter->hw.perm_mac_addr, ETH_ALEN)) {
2301                 memcpy(adapter->hw.mac_addr, adapter->hw.perm_mac_addr, ETH_ALEN);
2302                 atl1_set_mac_addr(&adapter->hw);
2303         }
2304
2305         iowrite16(0, adapter->hw.hw_addr + REG_GPHY_ENABLE);
2306         unregister_netdev(netdev);
2307         pci_iounmap(pdev, adapter->hw.hw_addr);
2308         pci_release_regions(pdev);
2309         free_netdev(netdev);
2310         pci_disable_device(pdev);
2311 }
2312
2313 #ifdef CONFIG_PM
2314 static int atl1_suspend(struct pci_dev *pdev, pm_message_t state)
2315 {
2316         struct net_device *netdev = pci_get_drvdata(pdev);
2317         struct atl1_adapter *adapter = netdev_priv(netdev);
2318         struct atl1_hw *hw = &adapter->hw;
2319         u32 ctrl = 0;
2320         u32 wufc = adapter->wol;
2321
2322         netif_device_detach(netdev);
2323         if (netif_running(netdev))
2324                 atl1_down(adapter);
2325
2326         atl1_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
2327         atl1_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
2328         if (ctrl & BMSR_LSTATUS)
2329                 wufc &= ~ATL1_WUFC_LNKC;
2330
2331         /* reduce speed to 10/100M */
2332         if (wufc) {
2333                 atl1_phy_enter_power_saving(hw);
2334                 /* if resume, let driver to re- setup link */
2335                 hw->phy_configured = false;
2336                 atl1_set_mac_addr(hw);
2337                 atl1_set_multi(netdev);
2338
2339                 ctrl = 0;
2340                 /* turn on magic packet wol */
2341                 if (wufc & ATL1_WUFC_MAG)
2342                         ctrl = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2343
2344                 /* turn on Link change WOL */
2345                 if (wufc & ATL1_WUFC_LNKC)
2346                         ctrl |= (WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN);
2347                 iowrite32(ctrl, hw->hw_addr + REG_WOL_CTRL);
2348
2349                 /* turn on all-multi mode if wake on multicast is enabled */
2350                 ctrl = ioread32(hw->hw_addr + REG_MAC_CTRL);
2351                 ctrl &= ~MAC_CTRL_DBG;
2352                 ctrl &= ~MAC_CTRL_PROMIS_EN;
2353                 if (wufc & ATL1_WUFC_MC)
2354                         ctrl |= MAC_CTRL_MC_ALL_EN;
2355                 else
2356                         ctrl &= ~MAC_CTRL_MC_ALL_EN;
2357
2358                 /* turn on broadcast mode if wake on-BC is enabled */
2359                 if (wufc & ATL1_WUFC_BC)
2360                         ctrl |= MAC_CTRL_BC_EN;
2361                 else
2362                         ctrl &= ~MAC_CTRL_BC_EN;
2363
2364                 /* enable RX */
2365                 ctrl |= MAC_CTRL_RX_EN;
2366                 iowrite32(ctrl, hw->hw_addr + REG_MAC_CTRL);
2367                 pci_enable_wake(pdev, PCI_D3hot, 1);
2368                 pci_enable_wake(pdev, PCI_D3cold, 1);   /* 4 == D3 cold */
2369         } else {
2370                 iowrite32(0, hw->hw_addr + REG_WOL_CTRL);
2371                 pci_enable_wake(pdev, PCI_D3hot, 0);
2372                 pci_enable_wake(pdev, PCI_D3cold, 0);   /* 4 == D3 cold */
2373         }
2374
2375         pci_save_state(pdev);
2376         pci_disable_device(pdev);
2377
2378         pci_set_power_state(pdev, PCI_D3hot);
2379
2380         return 0;
2381 }
2382
2383 static int atl1_resume(struct pci_dev *pdev)
2384 {
2385         struct net_device *netdev = pci_get_drvdata(pdev);
2386         struct atl1_adapter *adapter = netdev_priv(netdev);
2387         u32 ret_val;
2388
2389         pci_set_power_state(pdev, 0);
2390         pci_restore_state(pdev);
2391
2392         ret_val = pci_enable_device(pdev);
2393         pci_enable_wake(pdev, PCI_D3hot, 0);
2394         pci_enable_wake(pdev, PCI_D3cold, 0);
2395
2396         iowrite32(0, adapter->hw.hw_addr + REG_WOL_CTRL);
2397         atl1_reset(adapter);
2398
2399         if (netif_running(netdev))
2400                 atl1_up(adapter);
2401         netif_device_attach(netdev);
2402
2403         atl1_via_workaround(adapter);
2404
2405         return 0;
2406 }
2407 #else
2408 #define atl1_suspend NULL
2409 #define atl1_resume NULL
2410 #endif
2411
2412 static struct pci_driver atl1_driver = {
2413         .name = atl1_driver_name,
2414         .id_table = atl1_pci_tbl,
2415         .probe = atl1_probe,
2416         .remove = __devexit_p(atl1_remove),
2417         /* Power Managment Hooks */
2418         /* probably broken right now -- CHS */
2419         .suspend = atl1_suspend,
2420         .resume = atl1_resume
2421 };
2422
2423 /*
2424  * atl1_exit_module - Driver Exit Cleanup Routine
2425  *
2426  * atl1_exit_module is called just before the driver is removed
2427  * from memory.
2428  */
2429 static void __exit atl1_exit_module(void)
2430 {
2431         pci_unregister_driver(&atl1_driver);
2432 }
2433
2434 /*
2435  * atl1_init_module - Driver Registration Routine
2436  *
2437  * atl1_init_module is the first routine called when the driver is
2438  * loaded. All it does is register with the PCI subsystem.
2439  */
2440 static int __init atl1_init_module(void)
2441 {
2442         return pci_register_driver(&atl1_driver);
2443 }
2444
2445 module_init(atl1_init_module);
2446 module_exit(atl1_exit_module);