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