drivers/net/atl1/atl1_main.c

   1 /*
   2  * Copyright(c) 2005 - 2006 Attansic Corporation. All rights reserved.
   3  * Copyright(c) 2006 Chris Snook <csnook@redhat.com>
   4  * Copyright(c) 2006 Jay Cliburn <jcliburn@gmail.com>
   5  *
   6  * Derived from Intel e1000 driver
   7  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the Free
  11  * Software Foundation; either version 2 of the License, or (at your option)
  12  * any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  * more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along with
  20  * this program; if not, write to the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22  *
  23  * The full GNU General Public License is included in this distribution in the
  24  * file called COPYING.
  25  *
  26  * Contact Information:
  27  * Xiong Huang <xiong_huang@attansic.com>
  28  * Attansic Technology Corp. 3F 147, Xianzheng 9th Road, Zhubei,
  29  * Xinzhu  302, TAIWAN, REPUBLIC OF CHINA
  30  *
  31  * Chris Snook <csnook@redhat.com>
  32  * Jay Cliburn <jcliburn@gmail.com>
  33  *
  34  * This version is adapted from the Attansic reference driver for
  35  * inclusion in the Linux kernel.  It is currently under heavy development.
  36  * A very incomplete list of things that need to be dealt with:
  37  *
  38  * TODO:
  39  * Fix TSO; tx performance is horrible with TSO enabled.
  40  * Wake on LAN.
  41  * Add more ethtool functions, including set ring parameters.
  42  * Fix abstruse irq enable/disable condition described here:
  43  *      http://marc.theaimsgroup.com/?l=linux-netdev&m=116398508500553&w=2
  44  *
  45  * NEEDS TESTING:
  46  * VLAN
  47  * multicast
  48  * promiscuous mode
  49  * interrupt coalescing
  50  * SMP torture testing
  51  */
  52
  53 #include <linux/types.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/pci.h>
  56 #include <linux/spinlock.h>
  57 #include <linux/slab.h>
  58 #include <linux/string.h>
  59 #include <linux/skbuff.h>
  60 #include <linux/etherdevice.h>
  61 #include <linux/if_vlan.h>
  62 #include <linux/irqreturn.h>
  63 #include <linux/workqueue.h>
  64 #include <linux/timer.h>
  65 #include <linux/jiffies.h>
  66 #include <linux/hardirq.h>
  67 #include <linux/interrupt.h>
  68 #include <linux/irqflags.h>
  69 #include <linux/dma-mapping.h>
  70 #include <linux/net.h>
  71 #include <linux/pm.h>
  72 #include <linux/in.h>
  73 #include <linux/ip.h>
  74 #include <linux/tcp.h>
  75 #include <linux/compiler.h>
  76 #include <linux/delay.h>
  77 #include <linux/mii.h>
  78 #include <net/checksum.h>
  79
  80 #include <asm/atomic.h>
  81 #include <asm/byteorder.h>
  82
  83 #include "atl1.h"
  84
  85 #define DRIVER_VERSION "2.0.7"
  86
  87 char atl1_driver_name[] = "atl1";
  88 static const char atl1_driver_string[] = "Attansic L1 Ethernet Network Driver";
  89 static const char atl1_copyright[] = "Copyright(c) 2005-2006 Attansic Corporation.";
  90 char atl1_driver_version[] = DRIVER_VERSION;
  91
  92 MODULE_AUTHOR
  93     ("Attansic Corporation <xiong_huang@attansic.com>, Chris Snook <csnook@redhat.com>, Jay Cliburn <jcliburn@gmail.com>");
  94 MODULE_DESCRIPTION("Attansic 1000M Ethernet Network Driver");
  95 MODULE_LICENSE("GPL");
  96 MODULE_VERSION(DRIVER_VERSION);
  97
  98 /*
  99  * atl1_pci_tbl - PCI Device ID Table
 100  */
 101 static const struct pci_device_id atl1_pci_tbl[] = {
 102         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1)},
 103         /* required last entry */
 104         {0,}
 105 };
 106
 107 MODULE_DEVICE_TABLE(pci, atl1_pci_tbl);
 108
 109 /*
 110  * atl1_sw_init - Initialize general software structures (struct atl1_adapter)
 111  * @adapter: board private structure to initialize
 112  *
 113  * atl1_sw_init initializes the Adapter private data structure.
 114  * Fields are initialized based on PCI device information and
 115  * OS network device settings (MTU size).
 116  */
 117 static int __devinit atl1_sw_init(struct atl1_adapter *adapter)
 118 {
 119         struct atl1_hw *hw = &adapter->hw;
 120         struct net_device *netdev = adapter->netdev;
 121         struct pci_dev *pdev = adapter->pdev;
 122
 123         /* PCI config space info */
 124         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 125
 126         hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
 127         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
 128
 129         adapter->wol = 0;
 130         adapter->rx_buffer_len = (hw->max_frame_size + 7) & ~7;
 131         adapter->ict = 50000;   /* 100ms */
 132         adapter->link_speed = SPEED_0;  /* hardware init */
 133         adapter->link_duplex = FULL_DUPLEX;
 134
 135         hw->phy_configured = false;
 136         hw->preamble_len = 7;
 137         hw->ipgt = 0x60;
 138         hw->min_ifg = 0x50;
 139         hw->ipgr1 = 0x40;
 140         hw->ipgr2 = 0x60;
 141         hw->max_retry = 0xf;
 142         hw->lcol = 0x37;
 143         hw->jam_ipg = 7;
 144         hw->rfd_burst = 8;
 145         hw->rrd_burst = 8;
 146         hw->rfd_fetch_gap = 1;
 147         hw->rx_jumbo_th = adapter->rx_buffer_len / 8;
 148         hw->rx_jumbo_lkah = 1;
 149         hw->rrd_ret_timer = 16;
 150         hw->tpd_burst = 4;
 151         hw->tpd_fetch_th = 16;
 152         hw->txf_burst = 0x100;
 153         hw->tx_jumbo_task_th = (hw->max_frame_size + 7) >> 3;
 154         hw->tpd_fetch_gap = 1;
 155         hw->rcb_value = atl1_rcb_64;
 156         hw->dma_ord = atl1_dma_ord_enh;
 157         hw->dmar_block = atl1_dma_req_256;
 158         hw->dmaw_block = atl1_dma_req_256;
 159         hw->cmb_rrd = 4;
 160         hw->cmb_tpd = 4;
 161         hw->cmb_rx_timer = 1;   /* about 2us */
 162         hw->cmb_tx_timer = 1;   /* about 2us */
 163         hw->smb_timer = 100000; /* about 200ms */
 164
 165         atomic_set(&adapter->irq_sem, 0);
 166         spin_lock_init(&adapter->lock);
 167         spin_lock_init(&adapter->mb_lock);
 168
 169         return 0;
 170 }
 171
 172 /*
 173  * atl1_setup_mem_resources - allocate Tx / RX descriptor resources
 174  * @adapter: board private structure
 175  *
 176  * Return 0 on success, negative on failure
 177  */
 178 s32 atl1_setup_ring_resources(struct atl1_adapter *adapter)
 179 {
 180         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
 181         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
 182         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
 183         struct atl1_ring_header *ring_header = &adapter->ring_header;
 184         struct pci_dev *pdev = adapter->pdev;
 185         int size;
 186         u8 offset = 0;
 187
 188         size = sizeof(struct atl1_buffer) * (tpd_ring->count + rfd_ring->count);
 189         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 190         if (unlikely(!tpd_ring->buffer_info)) {
 191                 dev_err(&pdev->dev, "kzalloc failed , size = D%d\n", size);
 192                 goto err_nomem;
 193         }
 194         rfd_ring->buffer_info =
 195             (struct atl1_buffer *)(tpd_ring->buffer_info + tpd_ring->count);
 196
 197         /* real ring DMA buffer */
 198         ring_header->size = size = sizeof(struct tx_packet_desc) *
 199                                         tpd_ring->count
 200             + sizeof(struct rx_free_desc) * rfd_ring->count
 201             + sizeof(struct rx_return_desc) * rrd_ring->count
 202             + sizeof(struct coals_msg_block)
 203             + sizeof(struct stats_msg_block)
 204             + 40;               /* "40: for 8 bytes align" huh? -- CHS */
 205
 206         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 207                                                 &ring_header->dma);
 208         if (unlikely(!ring_header->desc)) {
 209                 dev_err(&pdev->dev, "pci_alloc_consistent failed\n");
 210                 goto err_nomem;
 211         }
 212
 213         memset(ring_header->desc, 0, ring_header->size);
 214
 215         /* init TPD ring */
 216         tpd_ring->dma = ring_header->dma;
 217         offset = (tpd_ring->dma & 0x7) ? (8 - (ring_header->dma & 0x7)) : 0;
 218         tpd_ring->dma += offset;
 219         tpd_ring->desc = (u8 *) ring_header->desc + offset;
 220         tpd_ring->size = sizeof(struct tx_packet_desc) * tpd_ring->count;
 221         atomic_set(&tpd_ring->next_to_use, 0);
 222         atomic_set(&tpd_ring->next_to_clean, 0);
 223
 224         /* init RFD ring */
 225         rfd_ring->dma = tpd_ring->dma + tpd_ring->size;
 226         offset = (rfd_ring->dma & 0x7) ? (8 - (rfd_ring->dma & 0x7)) : 0;
 227         rfd_ring->dma += offset;
 228         rfd_ring->desc = (u8 *) tpd_ring->desc + (tpd_ring->size + offset);
 229         rfd_ring->size = sizeof(struct rx_free_desc) * rfd_ring->count;
 230         rfd_ring->next_to_clean = 0;
 231         /* rfd_ring->next_to_use = rfd_ring->count - 1; */
 232         atomic_set(&rfd_ring->next_to_use, 0);
 233
 234         /* init RRD ring */
 235         rrd_ring->dma = rfd_ring->dma + rfd_ring->size;
 236         offset = (rrd_ring->dma & 0x7) ? (8 - (rrd_ring->dma & 0x7)) : 0;
 237         rrd_ring->dma += offset;
 238         rrd_ring->desc = (u8 *) rfd_ring->desc + (rfd_ring->size + offset);
 239         rrd_ring->size = sizeof(struct rx_return_desc) * rrd_ring->count;
 240         rrd_ring->next_to_use = 0;
 241         atomic_set(&rrd_ring->next_to_clean, 0);
 242
 243         /* init CMB */
 244         adapter->cmb.dma = rrd_ring->dma + rrd_ring->size;
 245         offset = (adapter->cmb.dma & 0x7) ? (8 - (adapter->cmb.dma & 0x7)) : 0;
 246         adapter->cmb.dma += offset;
 247         adapter->cmb.cmb =
 248             (struct coals_msg_block *) ((u8 *) rrd_ring->desc +
 249                                    (rrd_ring->size + offset));
 250
 251         /* init SMB */
 252         adapter->smb.dma = adapter->cmb.dma + sizeof(struct coals_msg_block);
 253         offset = (adapter->smb.dma & 0x7) ? (8 - (adapter->smb.dma & 0x7)) : 0;
 254         adapter->smb.dma += offset;
 255         adapter->smb.smb = (struct stats_msg_block *)
 256             ((u8 *) adapter->cmb.cmb + (sizeof(struct coals_msg_block) + offset));
 257
 258         return ATL1_SUCCESS;
 259
 260 err_nomem:
 261         kfree(tpd_ring->buffer_info);
 262         return -ENOMEM;
 263 }
 264
 265 /*
 266  * atl1_irq_enable - Enable default interrupt generation settings
 267  * @adapter: board private structure
 268  */
 269 static void atl1_irq_enable(struct atl1_adapter *adapter)
 270 {
 271         if (likely(!atomic_dec_and_test(&adapter->irq_sem)))
 272                 iowrite32(IMR_NORMAL_MASK, adapter->hw.hw_addr + REG_IMR);
 273 }
 274
 275 static void atl1_clear_phy_int(struct atl1_adapter *adapter)
 276 {
 277         u16 phy_data;
 278         unsigned long flags;
 279
 280         spin_lock_irqsave(&adapter->lock, flags);
 281         atl1_read_phy_reg(&adapter->hw, 19, &phy_data);
 282         spin_unlock_irqrestore(&adapter->lock, flags);
 283 }
 284
 285 static void atl1_inc_smb(struct atl1_adapter *adapter)
 286 {
 287         struct stats_msg_block *smb = adapter->smb.smb;
 288
 289         /* Fill out the OS statistics structure */
 290         adapter->soft_stats.rx_packets += smb->rx_ok;
 291         adapter->soft_stats.tx_packets += smb->tx_ok;
 292         adapter->soft_stats.rx_bytes += smb->rx_byte_cnt;
 293         adapter->soft_stats.tx_bytes += smb->tx_byte_cnt;
 294         adapter->soft_stats.multicast += smb->rx_mcast;
 295         adapter->soft_stats.collisions += (smb->tx_1_col +
 296                                            smb->tx_2_col * 2 +
 297                                            smb->tx_late_col +
 298                                            smb->tx_abort_col *
 299                                            adapter->hw.max_retry);
 300
 301         /* Rx Errors */
 302         adapter->soft_stats.rx_errors += (smb->rx_frag +
 303                                           smb->rx_fcs_err +
 304                                           smb->rx_len_err +
 305                                           smb->rx_sz_ov +
 306                                           smb->rx_rxf_ov +
 307                                           smb->rx_rrd_ov + smb->rx_align_err);
 308         adapter->soft_stats.rx_fifo_errors += smb->rx_rxf_ov;
 309         adapter->soft_stats.rx_length_errors += smb->rx_len_err;
 310         adapter->soft_stats.rx_crc_errors += smb->rx_fcs_err;
 311         adapter->soft_stats.rx_frame_errors += smb->rx_align_err;
 312         adapter->soft_stats.rx_missed_errors += (smb->rx_rrd_ov +
 313                                                  smb->rx_rxf_ov);
 314
 315         adapter->soft_stats.rx_pause += smb->rx_pause;
 316         adapter->soft_stats.rx_rrd_ov += smb->rx_rrd_ov;
 317         adapter->soft_stats.rx_trunc += smb->rx_sz_ov;
 318
 319         /* Tx Errors */
 320         adapter->soft_stats.tx_errors += (smb->tx_late_col +
 321                                           smb->tx_abort_col +
 322                                           smb->tx_underrun + smb->tx_trunc);
 323         adapter->soft_stats.tx_fifo_errors += smb->tx_underrun;
 324         adapter->soft_stats.tx_aborted_errors += smb->tx_abort_col;
 325         adapter->soft_stats.tx_window_errors += smb->tx_late_col;
 326
 327         adapter->soft_stats.excecol += smb->tx_abort_col;
 328         adapter->soft_stats.deffer += smb->tx_defer;
 329         adapter->soft_stats.scc += smb->tx_1_col;
 330         adapter->soft_stats.mcc += smb->tx_2_col;
 331         adapter->soft_stats.latecol += smb->tx_late_col;
 332         adapter->soft_stats.tx_underun += smb->tx_underrun;
 333         adapter->soft_stats.tx_trunc += smb->tx_trunc;
 334         adapter->soft_stats.tx_pause += smb->tx_pause;
 335
 336         adapter->net_stats.rx_packets = adapter->soft_stats.rx_packets;
 337         adapter->net_stats.tx_packets = adapter->soft_stats.tx_packets;
 338         adapter->net_stats.rx_bytes = adapter->soft_stats.rx_bytes;
 339         adapter->net_stats.tx_bytes = adapter->soft_stats.tx_bytes;
 340         adapter->net_stats.multicast = adapter->soft_stats.multicast;
 341         adapter->net_stats.collisions = adapter->soft_stats.collisions;
 342         adapter->net_stats.rx_errors = adapter->soft_stats.rx_errors;
 343         adapter->net_stats.rx_over_errors =
 344             adapter->soft_stats.rx_missed_errors;
 345         adapter->net_stats.rx_length_errors =
 346             adapter->soft_stats.rx_length_errors;
 347         adapter->net_stats.rx_crc_errors = adapter->soft_stats.rx_crc_errors;
 348         adapter->net_stats.rx_frame_errors =
 349             adapter->soft_stats.rx_frame_errors;
 350         adapter->net_stats.rx_fifo_errors = adapter->soft_stats.rx_fifo_errors;
 351         adapter->net_stats.rx_missed_errors =
 352             adapter->soft_stats.rx_missed_errors;
 353         adapter->net_stats.tx_errors = adapter->soft_stats.tx_errors;
 354         adapter->net_stats.tx_fifo_errors = adapter->soft_stats.tx_fifo_errors;
 355         adapter->net_stats.tx_aborted_errors =
 356             adapter->soft_stats.tx_aborted_errors;
 357         adapter->net_stats.tx_window_errors =
 358             adapter->soft_stats.tx_window_errors;
 359         adapter->net_stats.tx_carrier_errors =
 360             adapter->soft_stats.tx_carrier_errors;
 361 }
 362
 363 static void atl1_rx_checksum(struct atl1_adapter *adapter,
 364                                         struct rx_return_desc *rrd,
 365                                         struct sk_buff *skb)
 366 {
 367         skb->ip_summed = CHECKSUM_NONE;
 368
 369         if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
 370                 if (rrd->err_flg & (ERR_FLAG_CRC | ERR_FLAG_TRUNC |
 371                                         ERR_FLAG_CODE | ERR_FLAG_OV)) {
 372                         adapter->hw_csum_err++;
 373                         dev_dbg(&adapter->pdev->dev, "rx checksum error\n");
 374                         return;
 375                 }
 376         }
 377
 378         /* not IPv4 */
 379         if (!(rrd->pkt_flg & PACKET_FLAG_IPV4))
 380                 /* checksum is invalid, but it's not an IPv4 pkt, so ok */
 381                 return;
 382
 383         /* IPv4 packet */
 384         if (likely(!(rrd->err_flg &
 385                 (ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM)))) {
 386                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 387                 adapter->hw_csum_good++;
 388                 return;
 389         }
 390
 391         /* IPv4, but hardware thinks its checksum is wrong */
 392         dev_dbg(&adapter->pdev->dev,
 393                 "hw csum wrong, pkt_flag:%x, err_flag:%x\n",
 394                 rrd->pkt_flg, rrd->err_flg);
 395         skb->ip_summed = CHECKSUM_COMPLETE;
 396         skb->csum = htons(rrd->xsz.xsum_sz.rx_chksum);
 397         adapter->hw_csum_err++;
 398         return;
 399 }
 400
 401 /*
 402  * atl1_alloc_rx_buffers - Replace used receive buffers
 403  * @adapter: address of board private structure
 404  */
 405 static u16 atl1_alloc_rx_buffers(struct atl1_adapter *adapter)
 406 {
 407         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
 408         struct pci_dev *pdev = adapter->pdev;
 409         struct page *page;
 410         unsigned long offset;
 411         struct atl1_buffer *buffer_info, *next_info;
 412         struct sk_buff *skb;
 413         u16 num_alloc = 0;
 414         u16 rfd_next_to_use, next_next;
 415         struct rx_free_desc *rfd_desc;
 416
 417         next_next = rfd_next_to_use = atomic_read(&rfd_ring->next_to_use);
 418         if (++next_next == rfd_ring->count)
 419                 next_next = 0;
 420         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
 421         next_info = &rfd_ring->buffer_info[next_next];
 422
 423         while (!buffer_info->alloced && !next_info->alloced) {
 424                 if (buffer_info->skb) {
 425                         buffer_info->alloced = 1;
 426                         goto next;
 427                 }
 428
 429                 rfd_desc = ATL1_RFD_DESC(rfd_ring, rfd_next_to_use);
 430
 431                 skb = dev_alloc_skb(adapter->rx_buffer_len + NET_IP_ALIGN);
 432                 if (unlikely(!skb)) {   /* Better luck next round */
 433                         adapter->net_stats.rx_dropped++;
 434                         break;
 435                 }
 436
 437                 /*
 438                  * Make buffer alignment 2 beyond a 16 byte boundary
 439                  * this will result in a 16 byte aligned IP header after
 440                  * the 14 byte MAC header is removed
 441                  */
 442                 skb_reserve(skb, NET_IP_ALIGN);
 443
 444                 buffer_info->alloced = 1;
 445                 buffer_info->skb = skb;
 446                 buffer_info->length = (u16) adapter->rx_buffer_len;
 447                 page = virt_to_page(skb->data);
 448                 offset = (unsigned long)skb->data & ~PAGE_MASK;
 449                 buffer_info->dma = pci_map_page(pdev, page, offset,
 450                                                 adapter->rx_buffer_len,
 451                                                 PCI_DMA_FROMDEVICE);
 452                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
 453                 rfd_desc->buf_len = cpu_to_le16(adapter->rx_buffer_len);
 454                 rfd_desc->coalese = 0;
 455
 456 next:
 457                 rfd_next_to_use = next_next;
 458                 if (unlikely(++next_next == rfd_ring->count))
 459                         next_next = 0;
 460
 461                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
 462                 next_info = &rfd_ring->buffer_info[next_next];
 463                 num_alloc++;
 464         }
 465
 466         if (num_alloc) {
 467                 /*
 468                  * Force memory writes to complete before letting h/w
 469                  * know there are new descriptors to fetch.  (Only
 470                  * applicable for weak-ordered memory model archs,
 471                  * such as IA-64).
 472                  */
 473                 wmb();
 474                 atomic_set(&rfd_ring->next_to_use, (int)rfd_next_to_use);
 475         }
 476         return num_alloc;
 477 }
 478
 479 static void atl1_intr_rx(struct atl1_adapter *adapter)
 480 {
 481         int i, count;
 482         u16 length;
 483         u16 rrd_next_to_clean;
 484         u32 value;
 485         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
 486         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
 487         struct atl1_buffer *buffer_info;
 488         struct rx_return_desc *rrd;
 489         struct sk_buff *skb;
 490
 491         count = 0;
 492
 493         rrd_next_to_clean = atomic_read(&rrd_ring->next_to_clean);
 494
 495         while (1) {
 496                 rrd = ATL1_RRD_DESC(rrd_ring, rrd_next_to_clean);
 497                 i = 1;
 498                 if (likely(rrd->xsz.valid)) {   /* packet valid */
 499 chk_rrd:
 500                         /* check rrd status */
 501                         if (likely(rrd->num_buf == 1))
 502                                 goto rrd_ok;
 503
 504                         /* rrd seems to be bad */
 505                         if (unlikely(i-- > 0)) {
 506                                 /* rrd may not be DMAed completely */
 507                                 dev_dbg(&adapter->pdev->dev,
 508                                         "incomplete RRD DMA transfer\n");
 509                                 udelay(1);
 510                                 goto chk_rrd;
 511                         }
 512                         /* bad rrd */
 513                         dev_dbg(&adapter->pdev->dev, "bad RRD\n");
 514                         /* see if update RFD index */
 515                         if (rrd->num_buf > 1) {
 516                                 u16 num_buf;
 517                                 num_buf =
 518                                     (rrd->xsz.xsum_sz.pkt_size +
 519                                      adapter->rx_buffer_len -
 520                                      1) / adapter->rx_buffer_len;
 521                                 if (rrd->num_buf == num_buf) {
 522                                         /* clean alloc flag for bad rrd */
 523                                         while (rfd_ring->next_to_clean !=
 524                                                (rrd->buf_indx + num_buf)) {
 525                                                 rfd_ring->buffer_info[rfd_ring->
 526                                                                       next_to_clean].alloced = 0;
 527                                                 if (++rfd_ring->next_to_clean ==
 528                                                     rfd_ring->count) {
 529                                                         rfd_ring->
 530                                                             next_to_clean = 0;
 531                                                 }
 532                                         }
 533                                 }
 534                         }
 535
 536                         /* update rrd */
 537                         rrd->xsz.valid = 0;
 538                         if (++rrd_next_to_clean == rrd_ring->count)
 539                                 rrd_next_to_clean = 0;
 540                         count++;
 541                         continue;
 542                 } else {        /* current rrd still not be updated */
 543
 544                         break;
 545                 }
 546 rrd_ok:
 547                 /* clean alloc flag for bad rrd */
 548                 while (rfd_ring->next_to_clean != rrd->buf_indx) {
 549                         rfd_ring->buffer_info[rfd_ring->next_to_clean].alloced =
 550                             0;
 551                         if (++rfd_ring->next_to_clean == rfd_ring->count)
 552                                 rfd_ring->next_to_clean = 0;
 553                 }
 554
 555                 buffer_info = &rfd_ring->buffer_info[rrd->buf_indx];
 556                 if (++rfd_ring->next_to_clean == rfd_ring->count)
 557                         rfd_ring->next_to_clean = 0;
 558
 559                 /* update rrd next to clean */
 560                 if (++rrd_next_to_clean == rrd_ring->count)
 561                         rrd_next_to_clean = 0;
 562                 count++;
 563
 564                 if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
 565                         if (!(rrd->err_flg &
 566                                 (ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM
 567                                 | ERR_FLAG_LEN))) {
 568                                 /* packet error, don't need upstream */
 569                                 buffer_info->alloced = 0;
 570                                 rrd->xsz.valid = 0;
 571                                 continue;
 572                         }
 573                 }
 574
 575                 /* Good Receive */
 576                 pci_unmap_page(adapter->pdev, buffer_info->dma,
 577                                buffer_info->length, PCI_DMA_FROMDEVICE);
 578                 skb = buffer_info->skb;
 579                 length = le16_to_cpu(rrd->xsz.xsum_sz.pkt_size);
 580
 581                 skb_put(skb, length - ETHERNET_FCS_SIZE);
 582
 583                 /* Receive Checksum Offload */
 584                 atl1_rx_checksum(adapter, rrd, skb);
 585                 skb->protocol = eth_type_trans(skb, adapter->netdev);
 586
 587                 if (adapter->vlgrp && (rrd->pkt_flg & PACKET_FLAG_VLAN_INS)) {
 588                         u16 vlan_tag = (rrd->vlan_tag >> 4) |
 589                                         ((rrd->vlan_tag & 7) << 13) |
 590                                         ((rrd->vlan_tag & 8) << 9);
 591                         vlan_hwaccel_rx(skb, adapter->vlgrp, vlan_tag);
 592                 } else
 593                         netif_rx(skb);
 594
 595                 /* let protocol layer free skb */
 596                 buffer_info->skb = NULL;
 597                 buffer_info->alloced = 0;
 598                 rrd->xsz.valid = 0;
 599
 600                 adapter->netdev->last_rx = jiffies;
 601         }
 602
 603         atomic_set(&rrd_ring->next_to_clean, rrd_next_to_clean);
 604
 605         atl1_alloc_rx_buffers(adapter);
 606
 607         /* update mailbox ? */
 608         if (count) {
 609                 u32 tpd_next_to_use;
 610                 u32 rfd_next_to_use;
 611                 u32 rrd_next_to_clean;
 612
 613                 spin_lock(&adapter->mb_lock);
 614
 615                 tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
 616                 rfd_next_to_use =
 617                     atomic_read(&adapter->rfd_ring.next_to_use);
 618                 rrd_next_to_clean =
 619                     atomic_read(&adapter->rrd_ring.next_to_clean);
 620                 value = ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
 621                         MB_RFD_PROD_INDX_SHIFT) |
 622                         ((rrd_next_to_clean & MB_RRD_CONS_INDX_MASK) <<
 623                         MB_RRD_CONS_INDX_SHIFT) |
 624                         ((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
 625                         MB_TPD_PROD_INDX_SHIFT);
 626                 iowrite32(value, adapter->hw.hw_addr + REG_MAILBOX);
 627                 spin_unlock(&adapter->mb_lock);
 628         }
 629 }
 630
 631 static void atl1_intr_tx(struct atl1_adapter *adapter)
 632 {
 633         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
 634         struct atl1_buffer *buffer_info;
 635         u16 sw_tpd_next_to_clean;
 636         u16 cmb_tpd_next_to_clean;
 637         u8 update = 0;
 638
 639         sw_tpd_next_to_clean = atomic_read(&tpd_ring->next_to_clean);
 640         cmb_tpd_next_to_clean = le16_to_cpu(adapter->cmb.cmb->tpd_cons_idx);
 641
 642         while (cmb_tpd_next_to_clean != sw_tpd_next_to_clean) {
 643                 struct tx_packet_desc *tpd;
 644                 update = 1;
 645                 tpd = ATL1_TPD_DESC(tpd_ring, sw_tpd_next_to_clean);
 646                 buffer_info = &tpd_ring->buffer_info[sw_tpd_next_to_clean];
 647                 if (buffer_info->dma) {
 648                         pci_unmap_page(adapter->pdev, buffer_info->dma,
 649                                        buffer_info->length, PCI_DMA_TODEVICE);
 650                         buffer_info->dma = 0;
 651                 }
 652
 653                 if (buffer_info->skb) {
 654                         dev_kfree_skb_irq(buffer_info->skb);
 655                         buffer_info->skb = NULL;
 656                 }
 657                 tpd->buffer_addr = 0;
 658                 tpd->desc.data = 0;
 659
 660                 if (++sw_tpd_next_to_clean == tpd_ring->count)
 661                         sw_tpd_next_to_clean = 0;
 662         }
 663         atomic_set(&tpd_ring->next_to_clean, sw_tpd_next_to_clean);
 664
 665         if (netif_queue_stopped(adapter->netdev)
 666             && netif_carrier_ok(adapter->netdev))
 667                 netif_wake_queue(adapter->netdev);
 668 }
 669
 670 static void atl1_check_for_link(struct atl1_adapter *adapter)
 671 {
 672         struct net_device *netdev = adapter->netdev;
 673         u16 phy_data = 0;
 674
 675         spin_lock(&adapter->lock);
 676         adapter->phy_timer_pending = false;
 677         atl1_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 678         atl1_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 679         spin_unlock(&adapter->lock);
 680
 681         /* notify upper layer link down ASAP */
 682         if (!(phy_data & BMSR_LSTATUS)) {       /* Link Down */
 683                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 684                         dev_info(&adapter->pdev->dev, "%s link is down\n",
 685                                 netdev->name);
 686                         adapter->link_speed = SPEED_0;
 687                         netif_carrier_off(netdev);
 688                         netif_stop_queue(netdev);
 689                 }
 690         }
 691         schedule_work(&adapter->link_chg_task);
 692 }
 693
 694 /*
 695  * atl1_intr - Interrupt Handler
 696  * @irq: interrupt number
 697  * @data: pointer to a network interface device structure
 698  * @pt_regs: CPU registers structure
 699  */
 700 static irqreturn_t atl1_intr(int irq, void *data)
 701 {
 702         /*struct atl1_adapter *adapter = ((struct net_device *)data)->priv;*/
 703         struct atl1_adapter *adapter = netdev_priv(data);
 704         u32 status;
 705         u8 update_rx;
 706         int max_ints = 10;
 707
 708         status = adapter->cmb.cmb->int_stats;
 709         if (!status)
 710                 return IRQ_NONE;
 711
 712         update_rx = 0;
 713
 714         do {
 715                 /* clear CMB interrupt status at once */
 716                 adapter->cmb.cmb->int_stats = 0;
 717
 718                 if (status & ISR_GPHY)  /* clear phy status */
 719                         atl1_clear_phy_int(adapter);
 720
 721                 /* clear ISR status, and Enable CMB DMA/Disable Interrupt */
 722                 iowrite32(status | ISR_DIS_INT, adapter->hw.hw_addr + REG_ISR);
 723
 724                 /* check if SMB intr */
 725                 if (status & ISR_SMB)
 726                         atl1_inc_smb(adapter);
 727
 728                 /* check if PCIE PHY Link down */
 729                 if (status & ISR_PHY_LINKDOWN) {
 730                         dev_dbg(&adapter->pdev->dev, "pcie phy link down %x\n",
 731                                 status);
 732                         if (netif_running(adapter->netdev)) {   /* reset MAC */
 733                                 iowrite32(0, adapter->hw.hw_addr + REG_IMR);
 734                                 schedule_work(&adapter->pcie_dma_to_rst_task);
 735                                 return IRQ_HANDLED;
 736                         }
 737                 }
 738
 739                 /* check if DMA read/write error ? */
 740                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
 741                         dev_dbg(&adapter->pdev->dev,
 742                                 "pcie DMA r/w error (status = 0x%x)\n",
 743                                 status);
 744                         iowrite32(0, adapter->hw.hw_addr + REG_IMR);
 745                         schedule_work(&adapter->pcie_dma_to_rst_task);
 746                         return IRQ_HANDLED;
 747                 }
 748
 749                 /* link event */
 750                 if (status & ISR_GPHY) {
 751                         adapter->soft_stats.tx_carrier_errors++;
 752                         atl1_check_for_link(adapter);
 753                 }
 754
 755                 /* transmit event */
 756                 if (status & ISR_CMB_TX)
 757                         atl1_intr_tx(adapter);
 758
 759                 /* rx exception */
 760                 if (unlikely(status & (ISR_RXF_OV | ISR_RFD_UNRUN |
 761                         ISR_RRD_OV | ISR_HOST_RFD_UNRUN |
 762                         ISR_HOST_RRD_OV | ISR_CMB_RX))) {
 763                         if (status & (ISR_RXF_OV | ISR_RFD_UNRUN |
 764                                 ISR_RRD_OV | ISR_HOST_RFD_UNRUN |
 765                                 ISR_HOST_RRD_OV))
 766                                 dev_dbg(&adapter->pdev->dev,
 767                                         "rx exception, ISR = 0x%x\n", status);
 768                         atl1_intr_rx(adapter);
 769                 }
 770
 771                 if (--max_ints < 0)
 772                         break;
 773
 774         } while ((status = adapter->cmb.cmb->int_stats));
 775
 776         /* re-enable Interrupt */
 777         iowrite32(ISR_DIS_SMB | ISR_DIS_DMA, adapter->hw.hw_addr + REG_ISR);
 778         return IRQ_HANDLED;
 779 }
 780
 781 /*
 782  * atl1_set_multi - Multicast and Promiscuous mode set
 783  * @netdev: network interface device structure
 784  *
 785  * The set_multi entry point is called whenever the multicast address
 786  * list or the network interface flags are updated.  This routine is
 787  * responsible for configuring the hardware for proper multicast,
 788  * promiscuous mode, and all-multi behavior.
 789  */
 790 static void atl1_set_multi(struct net_device *netdev)
 791 {
 792         struct atl1_adapter *adapter = netdev_priv(netdev);
 793         struct atl1_hw *hw = &adapter->hw;
 794         struct dev_mc_list *mc_ptr;
 795         u32 rctl;
 796         u32 hash_value;
 797
 798         /* Check for Promiscuous and All Multicast modes */
 799         rctl = ioread32(hw->hw_addr + REG_MAC_CTRL);
 800         if (netdev->flags & IFF_PROMISC)
 801                 rctl |= MAC_CTRL_PROMIS_EN;
 802         else if (netdev->flags & IFF_ALLMULTI) {
 803                 rctl |= MAC_CTRL_MC_ALL_EN;
 804                 rctl &= ~MAC_CTRL_PROMIS_EN;
 805         } else
 806                 rctl &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 807
 808         iowrite32(rctl, hw->hw_addr + REG_MAC_CTRL);
 809
 810         /* clear the old settings from the multicast hash table */
 811         iowrite32(0, hw->hw_addr + REG_RX_HASH_TABLE);
 812         iowrite32(0, (hw->hw_addr + REG_RX_HASH_TABLE) + (1 << 2));
 813
 814         /* compute mc addresses' hash value ,and put it into hash table */
 815         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
 816                 hash_value = atl1_hash_mc_addr(hw, mc_ptr->dmi_addr);
 817                 atl1_hash_set(hw, hash_value);
 818         }
 819 }
 820
 821 static void atl1_setup_mac_ctrl(struct atl1_adapter *adapter)
 822 {
 823         u32 value;
 824         struct atl1_hw *hw = &adapter->hw;
 825         struct net_device *netdev = adapter->netdev;
 826         /* Config MAC CTRL Register */
 827         value = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
 828         /* duplex */
 829         if (FULL_DUPLEX == adapter->link_duplex)
 830                 value |= MAC_CTRL_DUPLX;
 831         /* speed */
 832         value |= ((u32) ((SPEED_1000 == adapter->link_speed) ?
 833                          MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
 834                   MAC_CTRL_SPEED_SHIFT);
 835         /* flow control */
 836         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
 837         /* PAD & CRC */
 838         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
 839         /* preamble length */
 840         value |= (((u32) adapter->hw.preamble_len
 841                    & MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
 842         /* vlan */
 843         if (adapter->vlgrp)
 844                 value |= MAC_CTRL_RMV_VLAN;
 845         /* rx checksum
 846            if (adapter->rx_csum)
 847            value |= MAC_CTRL_RX_CHKSUM_EN;
 848          */
 849         /* filter mode */
 850         value |= MAC_CTRL_BC_EN;
 851         if (netdev->flags & IFF_PROMISC)
 852                 value |= MAC_CTRL_PROMIS_EN;
 853         else if (netdev->flags & IFF_ALLMULTI)
 854                 value |= MAC_CTRL_MC_ALL_EN;
 855         /* value |= MAC_CTRL_LOOPBACK; */
 856         iowrite32(value, hw->hw_addr + REG_MAC_CTRL);
 857 }
 858
 859 static u32 atl1_check_link(struct atl1_adapter *adapter)
 860 {
 861         struct atl1_hw *hw = &adapter->hw;
 862         struct net_device *netdev = adapter->netdev;
 863         u32 ret_val;
 864         u16 speed, duplex, phy_data;
 865         int reconfig = 0;
 866
 867         /* MII_BMSR must read twice */
 868         atl1_read_phy_reg(hw, MII_BMSR, &phy_data);
 869         atl1_read_phy_reg(hw, MII_BMSR, &phy_data);
 870         if (!(phy_data & BMSR_LSTATUS)) {       /* link down */
 871                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 872                         dev_info(&adapter->pdev->dev, "link is down\n");
 873                         adapter->link_speed = SPEED_0;
 874                         netif_carrier_off(netdev);
 875                         netif_stop_queue(netdev);
 876                 }
 877                 return ATL1_SUCCESS;
 878         }
 879
 880         /* Link Up */
 881         ret_val = atl1_get_speed_and_duplex(hw, &speed, &duplex);
 882         if (ret_val)
 883                 return ret_val;
 884
 885         switch (hw->media_type) {
 886         case MEDIA_TYPE_1000M_FULL:
 887                 if (speed != SPEED_1000 || duplex != FULL_DUPLEX)
 888                         reconfig = 1;
 889                 break;
 890         case MEDIA_TYPE_100M_FULL:
 891                 if (speed != SPEED_100 || duplex != FULL_DUPLEX)
 892                         reconfig = 1;
 893                 break;
 894         case MEDIA_TYPE_100M_HALF:
 895                 if (speed != SPEED_100 || duplex != HALF_DUPLEX)
 896                         reconfig = 1;
 897                 break;
 898         case MEDIA_TYPE_10M_FULL:
 899                 if (speed != SPEED_10 || duplex != FULL_DUPLEX)
 900                         reconfig = 1;
 901                 break;
 902         case MEDIA_TYPE_10M_HALF:
 903                 if (speed != SPEED_10 || duplex != HALF_DUPLEX)
 904                         reconfig = 1;
 905                 break;
 906         }
 907
 908         /* link result is our setting */
 909         if (!reconfig) {
 910                 if (adapter->link_speed != speed
 911                     || adapter->link_duplex != duplex) {
 912                         adapter->link_speed = speed;
 913                         adapter->link_duplex = duplex;
 914                         atl1_setup_mac_ctrl(adapter);
 915                         dev_info(&adapter->pdev->dev,
 916                                 "%s link is up %d Mbps %s\n",
 917                                 netdev->name, adapter->link_speed,
 918                                 adapter->link_duplex == FULL_DUPLEX ?
 919                                 "full duplex" : "half duplex");
 920                 }
 921                 if (!netif_carrier_ok(netdev)) {        /* Link down -> Up */
 922                         netif_carrier_on(netdev);
 923                         netif_wake_queue(netdev);
 924                 }
 925                 return ATL1_SUCCESS;
 926         }
 927
 928         /* change orignal link status */
 929         if (netif_carrier_ok(netdev)) {
 930                 adapter->link_speed = SPEED_0;
 931                 netif_carrier_off(netdev);
 932                 netif_stop_queue(netdev);
 933         }
 934
 935         if (hw->media_type != MEDIA_TYPE_AUTO_SENSOR &&
 936             hw->media_type != MEDIA_TYPE_1000M_FULL) {
 937                 switch (hw->media_type) {
 938                 case MEDIA_TYPE_100M_FULL:
 939                         phy_data = MII_CR_FULL_DUPLEX | MII_CR_SPEED_100 |
 940                                    MII_CR_RESET;
 941                         break;
 942                 case MEDIA_TYPE_100M_HALF:
 943                         phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
 944                         break;
 945                 case MEDIA_TYPE_10M_FULL:
 946                         phy_data =
 947                             MII_CR_FULL_DUPLEX | MII_CR_SPEED_10 | MII_CR_RESET;
 948                         break;
 949                 default:        /* MEDIA_TYPE_10M_HALF: */
 950                         phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
 951                         break;
 952                 }
 953                 atl1_write_phy_reg(hw, MII_BMCR, phy_data);
 954                 return ATL1_SUCCESS;
 955         }
 956
 957         /* auto-neg, insert timer to re-config phy */
 958         if (!adapter->phy_timer_pending) {
 959                 adapter->phy_timer_pending = true;
 960                 mod_timer(&adapter->phy_config_timer, jiffies + 3 * HZ);
 961         }
 962
 963         return ATL1_SUCCESS;
 964 }
 965
 966 static void set_flow_ctrl_old(struct atl1_adapter *adapter)
 967 {
 968         u32 hi, lo, value;
 969
 970         /* RFD Flow Control */
 971         value = adapter->rfd_ring.count;
 972         hi = value / 16;
 973         if (hi < 2)
 974                 hi = 2;
 975         lo = value * 7 / 8;
 976
 977         value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 978             ((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 979         iowrite32(value, adapter->hw.hw_addr + REG_RXQ_RXF_PAUSE_THRESH);
 980
 981         /* RRD Flow Control */
 982         value = adapter->rrd_ring.count;
 983         lo = value / 16;
 984         hi = value * 7 / 8;
 985         if (lo < 2)
 986                 lo = 2;
 987         value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
 988             ((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
 989         iowrite32(value, adapter->hw.hw_addr + REG_RXQ_RRD_PAUSE_THRESH);
 990 }
 991
 992 static void set_flow_ctrl_new(struct atl1_hw *hw)
 993 {
 994         u32 hi, lo, value;
 995
 996         /* RXF Flow Control */
 997         value = ioread32(hw->hw_addr + REG_SRAM_RXF_LEN);
 998         lo = value / 16;
 999         if (lo < 192)
1000                 lo = 192;
1001         hi = value * 7 / 8;
1002         if (hi < lo)
1003                 hi = lo + 16;
1004         value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
1005             ((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
1006         iowrite32(value, hw->hw_addr + REG_RXQ_RXF_PAUSE_THRESH);
1007
1008         /* RRD Flow Control */
1009         value = ioread32(hw->hw_addr + REG_SRAM_RRD_LEN);
1010         lo = value / 8;
1011         hi = value * 7 / 8;
1012         if (lo < 2)
1013                 lo = 2;
1014         if (hi < lo)
1015                 hi = lo + 3;
1016         value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
1017             ((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
1018         iowrite32(value, hw->hw_addr + REG_RXQ_RRD_PAUSE_THRESH);
1019 }
1020
1021 /*
1022  * atl1_configure - Configure Transmit&Receive Unit after Reset
1023  * @adapter: board private structure
1024  *
1025  * Configure the Tx /Rx unit of the MAC after a reset.
1026  */
1027 static u32 atl1_configure(struct atl1_adapter *adapter)
1028 {
1029         struct atl1_hw *hw = &adapter->hw;
1030         u32 value;
1031
1032         /* clear interrupt status */
1033         iowrite32(0xffffffff, adapter->hw.hw_addr + REG_ISR);
1034
1035         /* set MAC Address */
1036         value = (((u32) hw->mac_addr[2]) << 24) |
1037                 (((u32) hw->mac_addr[3]) << 16) |
1038                 (((u32) hw->mac_addr[4]) << 8) |
1039                 (((u32) hw->mac_addr[5]));
1040         iowrite32(value, hw->hw_addr + REG_MAC_STA_ADDR);
1041         value = (((u32) hw->mac_addr[0]) << 8) | (((u32) hw->mac_addr[1]));
1042         iowrite32(value, hw->hw_addr + (REG_MAC_STA_ADDR + 4));
1043
1044         /* tx / rx ring */
1045
1046         /* HI base address */
1047         iowrite32((u32) ((adapter->tpd_ring.dma & 0xffffffff00000000ULL) >> 32),
1048                 hw->hw_addr + REG_DESC_BASE_ADDR_HI);
1049         /* LO base address */
1050         iowrite32((u32) (adapter->rfd_ring.dma & 0x00000000ffffffffULL),
1051                 hw->hw_addr + REG_DESC_RFD_ADDR_LO);
1052         iowrite32((u32) (adapter->rrd_ring.dma & 0x00000000ffffffffULL),
1053                 hw->hw_addr + REG_DESC_RRD_ADDR_LO);
1054         iowrite32((u32) (adapter->tpd_ring.dma & 0x00000000ffffffffULL),
1055                 hw->hw_addr + REG_DESC_TPD_ADDR_LO);
1056         iowrite32((u32) (adapter->cmb.dma & 0x00000000ffffffffULL),
1057                 hw->hw_addr + REG_DESC_CMB_ADDR_LO);
1058         iowrite32((u32) (adapter->smb.dma & 0x00000000ffffffffULL),
1059                 hw->hw_addr + REG_DESC_SMB_ADDR_LO);
1060
1061         /* element count */
1062         value = adapter->rrd_ring.count;
1063         value <<= 16;
1064         value += adapter->rfd_ring.count;
1065         iowrite32(value, hw->hw_addr + REG_DESC_RFD_RRD_RING_SIZE);
1066         iowrite32(adapter->tpd_ring.count, hw->hw_addr + REG_DESC_TPD_RING_SIZE);
1067
1068         /* Load Ptr */
1069         iowrite32(1, hw->hw_addr + REG_LOAD_PTR);
1070
1071         /* config Mailbox */
1072         value = ((atomic_read(&adapter->tpd_ring.next_to_use)
1073                   & MB_TPD_PROD_INDX_MASK) << MB_TPD_PROD_INDX_SHIFT) |
1074             ((atomic_read(&adapter->rrd_ring.next_to_clean)
1075               & MB_RRD_CONS_INDX_MASK) << MB_RRD_CONS_INDX_SHIFT) |
1076             ((atomic_read(&adapter->rfd_ring.next_to_use)
1077               & MB_RFD_PROD_INDX_MASK) << MB_RFD_PROD_INDX_SHIFT);
1078         iowrite32(value, hw->hw_addr + REG_MAILBOX);
1079
1080         /* config IPG/IFG */
1081         value = (((u32) hw->ipgt & MAC_IPG_IFG_IPGT_MASK)
1082                  << MAC_IPG_IFG_IPGT_SHIFT) |
1083             (((u32) hw->min_ifg & MAC_IPG_IFG_MIFG_MASK)
1084              << MAC_IPG_IFG_MIFG_SHIFT) |
1085             (((u32) hw->ipgr1 & MAC_IPG_IFG_IPGR1_MASK)
1086              << MAC_IPG_IFG_IPGR1_SHIFT) |
1087             (((u32) hw->ipgr2 & MAC_IPG_IFG_IPGR2_MASK)
1088              << MAC_IPG_IFG_IPGR2_SHIFT);
1089         iowrite32(value, hw->hw_addr + REG_MAC_IPG_IFG);
1090
1091         /* config  Half-Duplex Control */
1092         value = ((u32) hw->lcol & MAC_HALF_DUPLX_CTRL_LCOL_MASK) |
1093             (((u32) hw->max_retry & MAC_HALF_DUPLX_CTRL_RETRY_MASK)
1094              << MAC_HALF_DUPLX_CTRL_RETRY_SHIFT) |
1095             MAC_HALF_DUPLX_CTRL_EXC_DEF_EN |
1096             (0xa << MAC_HALF_DUPLX_CTRL_ABEBT_SHIFT) |
1097             (((u32) hw->jam_ipg & MAC_HALF_DUPLX_CTRL_JAMIPG_MASK)
1098              << MAC_HALF_DUPLX_CTRL_JAMIPG_SHIFT);
1099         iowrite32(value, hw->hw_addr + REG_MAC_HALF_DUPLX_CTRL);
1100
1101         /* set Interrupt Moderator Timer */
1102         iowrite16(adapter->imt, hw->hw_addr + REG_IRQ_MODU_TIMER_INIT);
1103         iowrite32(MASTER_CTRL_ITIMER_EN, hw->hw_addr + REG_MASTER_CTRL);
1104
1105         /* set Interrupt Clear Timer */
1106         iowrite16(adapter->ict, hw->hw_addr + REG_CMBDISDMA_TIMER);
1107
1108         /* set MTU, 4 : VLAN */
1109         iowrite32(hw->max_frame_size + 4, hw->hw_addr + REG_MTU);
1110
1111         /* jumbo size & rrd retirement timer */
1112         value = (((u32) hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK)
1113                  << RXQ_JMBOSZ_TH_SHIFT) |
1114             (((u32) hw->rx_jumbo_lkah & RXQ_JMBO_LKAH_MASK)
1115              << RXQ_JMBO_LKAH_SHIFT) |
1116             (((u32) hw->rrd_ret_timer & RXQ_RRD_TIMER_MASK)
1117              << RXQ_RRD_TIMER_SHIFT);
1118         iowrite32(value, hw->hw_addr + REG_RXQ_JMBOSZ_RRDTIM);
1119
1120         /* Flow Control */
1121         switch (hw->dev_rev) {
1122         case 0x8001:
1123         case 0x9001:
1124         case 0x9002:
1125         case 0x9003:
1126                 set_flow_ctrl_old(adapter);
1127                 break;
1128         default:
1129                 set_flow_ctrl_new(hw);
1130                 break;
1131         }
1132
1133         /* config TXQ */
1134         value = (((u32) hw->tpd_burst & TXQ_CTRL_TPD_BURST_NUM_MASK)
1135                  << TXQ_CTRL_TPD_BURST_NUM_SHIFT) |
1136             (((u32) hw->txf_burst & TXQ_CTRL_TXF_BURST_NUM_MASK)
1137              << TXQ_CTRL_TXF_BURST_NUM_SHIFT) |
1138             (((u32) hw->tpd_fetch_th & TXQ_CTRL_TPD_FETCH_TH_MASK)
1139              << TXQ_CTRL_TPD_FETCH_TH_SHIFT) | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN;
1140         iowrite32(value, hw->hw_addr + REG_TXQ_CTRL);
1141
1142         /* min tpd fetch gap & tx jumbo packet size threshold for taskoffload */
1143         value = (((u32) hw->tx_jumbo_task_th & TX_JUMBO_TASK_TH_MASK)
1144                  << TX_JUMBO_TASK_TH_SHIFT) |
1145             (((u32) hw->tpd_fetch_gap & TX_TPD_MIN_IPG_MASK)
1146              << TX_TPD_MIN_IPG_SHIFT);
1147         iowrite32(value, hw->hw_addr + REG_TX_JUMBO_TASK_TH_TPD_IPG);
1148
1149         /* config RXQ */
1150         value = (((u32) hw->rfd_burst & RXQ_CTRL_RFD_BURST_NUM_MASK)
1151                  << RXQ_CTRL_RFD_BURST_NUM_SHIFT) |
1152             (((u32) hw->rrd_burst & RXQ_CTRL_RRD_BURST_THRESH_MASK)
1153              << RXQ_CTRL_RRD_BURST_THRESH_SHIFT) |
1154             (((u32) hw->rfd_fetch_gap & RXQ_CTRL_RFD_PREF_MIN_IPG_MASK)
1155              << RXQ_CTRL_RFD_PREF_MIN_IPG_SHIFT) |
1156             RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1157         iowrite32(value, hw->hw_addr + REG_RXQ_CTRL);
1158
1159         /* config DMA Engine */
1160         value = ((((u32) hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1161                  << DMA_CTRL_DMAR_BURST_LEN_SHIFT) |
1162             ((((u32) hw->dmaw_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1163              << DMA_CTRL_DMAR_BURST_LEN_SHIFT) |
1164             DMA_CTRL_DMAR_EN | DMA_CTRL_DMAW_EN;
1165         value |= (u32) hw->dma_ord;
1166         if (atl1_rcb_128 == hw->rcb_value)
1167                 value |= DMA_CTRL_RCB_VALUE;
1168         iowrite32(value, hw->hw_addr + REG_DMA_CTRL);
1169
1170         /* config CMB / SMB */
1171         value = hw->cmb_rrd | ((u32) hw->cmb_tpd << 16);
1172         iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TH);
1173         value = hw->cmb_rx_timer | ((u32) hw->cmb_tx_timer << 16);
1174         iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TIMER);
1175         iowrite32(hw->smb_timer, hw->hw_addr + REG_SMB_TIMER);
1176
1177         /* --- enable CMB / SMB */
1178         value = CSMB_CTRL_CMB_EN | CSMB_CTRL_SMB_EN;
1179         iowrite32(value, hw->hw_addr + REG_CSMB_CTRL);
1180
1181         value = ioread32(adapter->hw.hw_addr + REG_ISR);
1182         if (unlikely((value & ISR_PHY_LINKDOWN) != 0))
1183                 value = 1;      /* config failed */
1184         else
1185                 value = 0;
1186
1187         /* clear all interrupt status */
1188         iowrite32(0x3fffffff, adapter->hw.hw_addr + REG_ISR);
1189         iowrite32(0, adapter->hw.hw_addr + REG_ISR);
1190         return value;
1191 }
1192
1193 /*
1194  * atl1_irq_disable - Mask off interrupt generation on the NIC
1195  * @adapter: board private structure
1196  */
1197 static void atl1_irq_disable(struct atl1_adapter *adapter)
1198 {
1199         atomic_inc(&adapter->irq_sem);
1200         iowrite32(0, adapter->hw.hw_addr + REG_IMR);
1201         ioread32(adapter->hw.hw_addr + REG_IMR);
1202         synchronize_irq(adapter->pdev->irq);
1203 }
1204
1205 static void atl1_vlan_rx_register(struct net_device *netdev,
1206                                 struct vlan_group *grp)
1207 {
1208         struct atl1_adapter *adapter = netdev_priv(netdev);
1209         unsigned long flags;
1210         u32 ctrl;
1211
1212         spin_lock_irqsave(&adapter->lock, flags);
1213         /* atl1_irq_disable(adapter); */
1214         adapter->vlgrp = grp;
1215
1216         if (grp) {
1217                 /* enable VLAN tag insert/strip */
1218                 ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
1219                 ctrl |= MAC_CTRL_RMV_VLAN;
1220                 iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
1221         } else {
1222                 /* disable VLAN tag insert/strip */
1223                 ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
1224                 ctrl &= ~MAC_CTRL_RMV_VLAN;
1225                 iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
1226         }
1227
1228         /* atl1_irq_enable(adapter); */
1229         spin_unlock_irqrestore(&adapter->lock, flags);
1230 }
1231
1232 static void atl1_restore_vlan(struct atl1_adapter *adapter)
1233 {
1234         atl1_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1235 }
1236
1237 static u16 tpd_avail(struct atl1_tpd_ring *tpd_ring)
1238 {
1239         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1240         u16 next_to_use = atomic_read(&tpd_ring->next_to_use);
1241         return ((next_to_clean >
1242                  next_to_use) ? next_to_clean - next_to_use -
1243                 1 : tpd_ring->count + next_to_clean - next_to_use - 1);
1244 }
1245
1246 static int atl1_tso(struct atl1_adapter *adapter, struct sk_buff *skb,
1247                          struct tso_param *tso)
1248 {
1249         /* We enter this function holding a spinlock. */
1250         u8 ipofst;
1251         int err;
1252
1253         if (skb_shinfo(skb)->gso_size) {
1254                 if (skb_header_cloned(skb)) {
1255                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1256                         if (unlikely(err))
1257                                 return err;
1258                 }
1259
1260                 if (skb->protocol == ntohs(ETH_P_IP)) {
1261                         struct iphdr *iph = ip_hdr(skb);
1262
1263                         iph->tot_len = 0;
1264                         iph->check = 0;
1265                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1266                                                                  iph->daddr, 0,
1267                                                                  IPPROTO_TCP,
1268                                                                  0);
1269                         ipofst = skb_network_offset(skb);
1270                         if (ipofst != ENET_HEADER_SIZE) /* 802.3 frame */
1271                                 tso->tsopl |= 1 << TSO_PARAM_ETHTYPE_SHIFT;
1272
1273                         tso->tsopl |= (iph->ihl &
1274                                 CSUM_PARAM_IPHL_MASK) << CSUM_PARAM_IPHL_SHIFT;
1275                         tso->tsopl |= (tcp_hdrlen(skb) &
1276                                 TSO_PARAM_TCPHDRLEN_MASK) << TSO_PARAM_TCPHDRLEN_SHIFT;
1277                         tso->tsopl |= (skb_shinfo(skb)->gso_size &
1278                                 TSO_PARAM_MSS_MASK) << TSO_PARAM_MSS_SHIFT;
1279                         tso->tsopl |= 1 << TSO_PARAM_IPCKSUM_SHIFT;
1280                         tso->tsopl |= 1 << TSO_PARAM_TCPCKSUM_SHIFT;
1281                         tso->tsopl |= 1 << TSO_PARAM_SEGMENT_SHIFT;
1282                         return true;
1283                 }
1284         }
1285         return false;
1286 }
1287
1288 static int atl1_tx_csum(struct atl1_adapter *adapter, struct sk_buff *skb,
1289                         struct csum_param *csum)
1290 {
1291         u8 css, cso;
1292
1293         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1294                 cso = skb_transport_offset(skb);
1295                 css = cso + skb->csum_offset;
1296                 if (unlikely(cso & 0x1)) {
1297                         dev_dbg(&adapter->pdev->dev,
1298                                 "payload offset not an even number\n");
1299                         return -1;
1300                 }
1301                 csum->csumpl |= (cso & CSUM_PARAM_PLOADOFFSET_MASK) <<
1302                         CSUM_PARAM_PLOADOFFSET_SHIFT;
1303                 csum->csumpl |= (css & CSUM_PARAM_XSUMOFFSET_MASK) <<
1304                         CSUM_PARAM_XSUMOFFSET_SHIFT;
1305                 csum->csumpl |= 1 << CSUM_PARAM_CUSTOMCKSUM_SHIFT;
1306                 return true;
1307         }
1308
1309         return true;
1310 }
1311
1312 static void atl1_tx_map(struct atl1_adapter *adapter,
1313                                 struct sk_buff *skb, bool tcp_seg)
1314 {
1315         /* We enter this function holding a spinlock. */
1316         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1317         struct atl1_buffer *buffer_info;
1318         struct page *page;
1319         int first_buf_len = skb->len;
1320         unsigned long offset;
1321         unsigned int nr_frags;
1322         unsigned int f;
1323         u16 tpd_next_to_use;
1324         u16 proto_hdr_len;
1325         u16 i, m, len12;
1326
1327         first_buf_len -= skb->data_len;
1328         nr_frags = skb_shinfo(skb)->nr_frags;
1329         tpd_next_to_use = atomic_read(&tpd_ring->next_to_use);
1330         buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
1331         if (unlikely(buffer_info->skb))
1332                 BUG();
1333         buffer_info->skb = NULL;        /* put skb in last TPD */
1334
1335         if (tcp_seg) {
1336                 /* TSO/GSO */
1337                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1338                 buffer_info->length = proto_hdr_len;
1339                 page = virt_to_page(skb->data);
1340                 offset = (unsigned long)skb->data & ~PAGE_MASK;
1341                 buffer_info->dma = pci_map_page(adapter->pdev, page,
1342                                                 offset, proto_hdr_len,
1343                                                 PCI_DMA_TODEVICE);
1344
1345                 if (++tpd_next_to_use == tpd_ring->count)
1346                         tpd_next_to_use = 0;
1347
1348                 if (first_buf_len > proto_hdr_len) {
1349                         len12 = first_buf_len - proto_hdr_len;
1350                         m = (len12 + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1351                         for (i = 0; i < m; i++) {
1352                                 buffer_info =
1353                                     &tpd_ring->buffer_info[tpd_next_to_use];
1354                                 buffer_info->skb = NULL;
1355                                 buffer_info->length =
1356                                     (MAX_TX_BUF_LEN >=
1357                                      len12) ? MAX_TX_BUF_LEN : len12;
1358                                 len12 -= buffer_info->length;
1359                                 page = virt_to_page(skb->data +
1360                                                  (proto_hdr_len +
1361                                                   i * MAX_TX_BUF_LEN));
1362                                 offset = (unsigned long)(skb->data +
1363                                                         (proto_hdr_len +
1364                                                         i * MAX_TX_BUF_LEN)) &
1365                                                         ~PAGE_MASK;
1366                                 buffer_info->dma =
1367                                     pci_map_page(adapter->pdev, page, offset,
1368                                                  buffer_info->length,
1369                                                  PCI_DMA_TODEVICE);
1370                                 if (++tpd_next_to_use == tpd_ring->count)
1371                                         tpd_next_to_use = 0;
1372                         }
1373                 }
1374         } else {
1375                 /* not TSO/GSO */
1376                 buffer_info->length = first_buf_len;
1377                 page = virt_to_page(skb->data);
1378                 offset = (unsigned long)skb->data & ~PAGE_MASK;
1379                 buffer_info->dma = pci_map_page(adapter->pdev, page,
1380                                                 offset, first_buf_len,
1381                                                 PCI_DMA_TODEVICE);
1382                 if (++tpd_next_to_use == tpd_ring->count)
1383                         tpd_next_to_use = 0;
1384         }
1385
1386         for (f = 0; f < nr_frags; f++) {
1387                 struct skb_frag_struct *frag;
1388                 u16 lenf, i, m;
1389
1390                 frag = &skb_shinfo(skb)->frags[f];
1391                 lenf = frag->size;
1392
1393                 m = (lenf + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1394                 for (i = 0; i < m; i++) {
1395                         buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
1396                         if (unlikely(buffer_info->skb))
1397                                 BUG();
1398                         buffer_info->skb = NULL;
1399                         buffer_info->length =
1400                             (lenf > MAX_TX_BUF_LEN) ? MAX_TX_BUF_LEN : lenf;
1401                         lenf -= buffer_info->length;
1402                         buffer_info->dma =
1403                             pci_map_page(adapter->pdev, frag->page,
1404                                          frag->page_offset + i * MAX_TX_BUF_LEN,
1405                                          buffer_info->length, PCI_DMA_TODEVICE);
1406
1407                         if (++tpd_next_to_use == tpd_ring->count)
1408                                 tpd_next_to_use = 0;
1409                 }
1410         }
1411
1412         /* last tpd's buffer-info */
1413         buffer_info->skb = skb;
1414 }
1415
1416 static void atl1_tx_queue(struct atl1_adapter *adapter, int count,
1417                                union tpd_descr *descr)
1418 {
1419         /* We enter this function holding a spinlock. */
1420         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1421         int j;
1422         u32 val;
1423         struct atl1_buffer *buffer_info;
1424         struct tx_packet_desc *tpd;
1425         u16 tpd_next_to_use = atomic_read(&tpd_ring->next_to_use);
1426
1427         for (j = 0; j < count; j++) {
1428                 buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
1429                 tpd = ATL1_TPD_DESC(&adapter->tpd_ring, tpd_next_to_use);
1430                 tpd->desc.csum.csumpu = descr->csum.csumpu;
1431                 tpd->desc.csum.csumpl = descr->csum.csumpl;
1432                 tpd->desc.tso.tsopu = descr->tso.tsopu;
1433                 tpd->desc.tso.tsopl = descr->tso.tsopl;
1434                 tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1435                 tpd->desc.data = descr->data;
1436                 tpd->desc.csum.csumpu |= (cpu_to_le16(buffer_info->length) &
1437                         CSUM_PARAM_BUFLEN_MASK) << CSUM_PARAM_BUFLEN_SHIFT;
1438
1439                 val = (descr->tso.tsopl >> TSO_PARAM_SEGMENT_SHIFT) &
1440                         TSO_PARAM_SEGMENT_MASK;
1441                 if (val && !j)
1442                         tpd->desc.tso.tsopl |= 1 << TSO_PARAM_HDRFLAG_SHIFT;
1443
1444                 if (j == (count - 1))
1445                         tpd->desc.csum.csumpl |= 1 << CSUM_PARAM_EOP_SHIFT;
1446
1447                 if (++tpd_next_to_use == tpd_ring->count)
1448                         tpd_next_to_use = 0;
1449         }
1450         /*
1451          * Force memory writes to complete before letting h/w
1452          * know there are new descriptors to fetch.  (Only
1453          * applicable for weak-ordered memory model archs,
1454          * such as IA-64).
1455          */
1456         wmb();
1457
1458         atomic_set(&tpd_ring->next_to_use, (int)tpd_next_to_use);
1459 }
1460
1461 static void atl1_update_mailbox(struct atl1_adapter *adapter)
1462 {
1463         unsigned long flags;
1464         u32 tpd_next_to_use;
1465         u32 rfd_next_to_use;
1466         u32 rrd_next_to_clean;
1467         u32 value;
1468
1469         spin_lock_irqsave(&adapter->mb_lock, flags);
1470
1471         tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
1472         rfd_next_to_use = atomic_read(&adapter->rfd_ring.next_to_use);
1473         rrd_next_to_clean = atomic_read(&adapter->rrd_ring.next_to_clean);
1474
1475         value = ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
1476                 MB_RFD_PROD_INDX_SHIFT) |
1477                 ((rrd_next_to_clean & MB_RRD_CONS_INDX_MASK) <<
1478                 MB_RRD_CONS_INDX_SHIFT) |
1479                 ((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
1480                 MB_TPD_PROD_INDX_SHIFT);
1481         iowrite32(value, adapter->hw.hw_addr + REG_MAILBOX);
1482
1483         spin_unlock_irqrestore(&adapter->mb_lock, flags);
1484 }
1485
1486 static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1487 {
1488         struct atl1_adapter *adapter = netdev_priv(netdev);
1489         int len = skb->len;
1490         int tso;
1491         int count = 1;
1492         int ret_val;
1493         u32 val;
1494         union tpd_descr param;
1495         u16 frag_size;
1496         u16 vlan_tag;
1497         unsigned long flags;
1498         unsigned int nr_frags = 0;
1499         unsigned int mss = 0;
1500         unsigned int f;
1501         unsigned int proto_hdr_len;
1502
1503         len -= skb->data_len;
1504
1505         if (unlikely(skb->len == 0)) {
1506                 dev_kfree_skb_any(skb);
1507                 return NETDEV_TX_OK;
1508         }
1509
1510         param.data = 0;
1511         param.tso.tsopu = 0;
1512         param.tso.tsopl = 0;
1513         param.csum.csumpu = 0;
1514         param.csum.csumpl = 0;
1515
1516         /* nr_frags will be nonzero if we're doing scatter/gather (SG) */
1517         nr_frags = skb_shinfo(skb)->nr_frags;
1518         for (f = 0; f < nr_frags; f++) {
1519                 frag_size = skb_shinfo(skb)->frags[f].size;
1520                 if (frag_size)
1521                         count +=
1522                             (frag_size + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1523         }
1524
1525         /* mss will be nonzero if we're doing segment offload (TSO/GSO) */
1526         mss = skb_shinfo(skb)->gso_size;
1527         if (mss) {
1528                 if (skb->protocol == htons(ETH_P_IP)) {
1529                         proto_hdr_len = (skb_transport_offset(skb) +
1530                                          tcp_hdrlen(skb));
1531                         if (unlikely(proto_hdr_len > len)) {
1532                                 dev_kfree_skb_any(skb);
1533                                 return NETDEV_TX_OK;
1534                         }
1535                         /* need additional TPD ? */
1536                         if (proto_hdr_len != len)
1537                                 count += (len - proto_hdr_len +
1538                                         MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1539                 }
1540         }
1541
1542         local_irq_save(flags);
1543         if (!spin_trylock(&adapter->lock)) {
1544                 /* Can't get lock - tell upper layer to requeue */
1545                 local_irq_restore(flags);
1546                 dev_dbg(&adapter->pdev->dev, "tx locked\n");
1547                 return NETDEV_TX_LOCKED;
1548         }
1549
1550         if (tpd_avail(&adapter->tpd_ring) < count) {
1551                 /* not enough descriptors */
1552                 netif_stop_queue(netdev);
1553                 spin_unlock_irqrestore(&adapter->lock, flags);
1554                 dev_dbg(&adapter->pdev->dev, "tx busy\n");
1555                 return NETDEV_TX_BUSY;
1556         }
1557
1558         param.data = 0;
1559
1560         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
1561                 vlan_tag = vlan_tx_tag_get(skb);
1562                 vlan_tag = (vlan_tag << 4) | (vlan_tag >> 13) |
1563                         ((vlan_tag >> 9) & 0x8);
1564                 param.csum.csumpl |= 1 << CSUM_PARAM_INSVLAG_SHIFT;
1565                 param.csum.csumpu |= (vlan_tag & CSUM_PARAM_VALANTAG_MASK) <<
1566                         CSUM_PARAM_VALAN_SHIFT;
1567         }
1568
1569         tso = atl1_tso(adapter, skb, &param.tso);
1570         if (tso < 0) {
1571                 spin_unlock_irqrestore(&adapter->lock, flags);
1572                 dev_kfree_skb_any(skb);
1573                 return NETDEV_TX_OK;
1574         }
1575
1576         if (!tso) {
1577                 ret_val = atl1_tx_csum(adapter, skb, &param.csum);
1578                 if (ret_val < 0) {
1579                         spin_unlock_irqrestore(&adapter->lock, flags);
1580                         dev_kfree_skb_any(skb);
1581                         return NETDEV_TX_OK;
1582                 }
1583         }
1584
1585         val = (param.csum.csumpl >> CSUM_PARAM_SEGMENT_SHIFT) &
1586                 CSUM_PARAM_SEGMENT_MASK;
1587         atl1_tx_map(adapter, skb, 1 == val);
1588         atl1_tx_queue(adapter, count, &param);
1589         netdev->trans_start = jiffies;
1590         spin_unlock_irqrestore(&adapter->lock, flags);
1591         atl1_update_mailbox(adapter);
1592         return NETDEV_TX_OK;
1593 }
1594
1595 /*
1596  * atl1_get_stats - Get System Network Statistics
1597  * @netdev: network interface device structure
1598  *
1599  * Returns the address of the device statistics structure.
1600  * The statistics are actually updated from the timer callback.
1601  */
1602 static struct net_device_stats *atl1_get_stats(struct net_device *netdev)
1603 {
1604         struct atl1_adapter *adapter = netdev_priv(netdev);
1605         return &adapter->net_stats;
1606 }
1607
1608 /*
1609  * atl1_clean_rx_ring - Free RFD Buffers
1610  * @adapter: board private structure
1611  */
1612 static void atl1_clean_rx_ring(struct atl1_adapter *adapter)
1613 {
1614         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1615         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1616         struct atl1_buffer *buffer_info;
1617         struct pci_dev *pdev = adapter->pdev;
1618         unsigned long size;
1619         unsigned int i;
1620
1621         /* Free all the Rx ring sk_buffs */
1622         for (i = 0; i < rfd_ring->count; i++) {
1623                 buffer_info = &rfd_ring->buffer_info[i];
1624                 if (buffer_info->dma) {
1625                         pci_unmap_page(pdev,
1626                                         buffer_info->dma,
1627                                         buffer_info->length,
1628                                         PCI_DMA_FROMDEVICE);
1629                         buffer_info->dma = 0;
1630                 }
1631                 if (buffer_info->skb) {
1632                         dev_kfree_skb(buffer_info->skb);
1633                         buffer_info->skb = NULL;
1634                 }
1635         }
1636
1637         size = sizeof(struct atl1_buffer) * rfd_ring->count;
1638         memset(rfd_ring->buffer_info, 0, size);
1639
1640         /* Zero out the descriptor ring */
1641         memset(rfd_ring->desc, 0, rfd_ring->size);
1642
1643         rfd_ring->next_to_clean = 0;
1644         atomic_set(&rfd_ring->next_to_use, 0);
1645
1646         rrd_ring->next_to_use = 0;
1647         atomic_set(&rrd_ring->next_to_clean, 0);
1648 }
1649
1650 /*
1651  * atl1_clean_tx_ring - Free Tx Buffers
1652  * @adapter: board private structure
1653  */
1654 static void atl1_clean_tx_ring(struct atl1_adapter *adapter)
1655 {
1656         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1657         struct atl1_buffer *buffer_info;
1658         struct pci_dev *pdev = adapter->pdev;
1659         unsigned long size;
1660         unsigned int i;
1661
1662         /* Free all the Tx ring sk_buffs */
1663         for (i = 0; i < tpd_ring->count; i++) {
1664                 buffer_info = &tpd_ring->buffer_info[i];
1665                 if (buffer_info->dma) {
1666                         pci_unmap_page(pdev, buffer_info->dma,
1667                                        buffer_info->length, PCI_DMA_TODEVICE);
1668                         buffer_info->dma = 0;
1669                 }
1670         }
1671
1672         for (i = 0; i < tpd_ring->count; i++) {
1673                 buffer_info = &tpd_ring->buffer_info[i];
1674                 if (buffer_info->skb) {
1675                         dev_kfree_skb_any(buffer_info->skb);
1676                         buffer_info->skb = NULL;
1677                 }
1678         }
1679
1680         size = sizeof(struct atl1_buffer) * tpd_ring->count;
1681         memset(tpd_ring->buffer_info, 0, size);
1682
1683         /* Zero out the descriptor ring */
1684         memset(tpd_ring->desc, 0, tpd_ring->size);
1685
1686         atomic_set(&tpd_ring->next_to_use, 0);
1687         atomic_set(&tpd_ring->next_to_clean, 0);
1688 }
1689
1690 /*
1691  * atl1_free_ring_resources - Free Tx / RX descriptor Resources
1692  * @adapter: board private structure
1693  *
1694  * Free all transmit software resources
1695  */
1696 void atl1_free_ring_resources(struct atl1_adapter *adapter)
1697 {
1698         struct pci_dev *pdev = adapter->pdev;
1699         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1700         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1701         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1702         struct atl1_ring_header *ring_header = &adapter->ring_header;
1703
1704         atl1_clean_tx_ring(adapter);
1705         atl1_clean_rx_ring(adapter);
1706
1707         kfree(tpd_ring->buffer_info);
1708         pci_free_consistent(pdev, ring_header->size, ring_header->desc,
1709                             ring_header->dma);
1710
1711         tpd_ring->buffer_info = NULL;
1712         tpd_ring->desc = NULL;
1713         tpd_ring->dma = 0;
1714
1715         rfd_ring->buffer_info = NULL;
1716         rfd_ring->desc = NULL;
1717         rfd_ring->dma = 0;
1718
1719         rrd_ring->desc = NULL;
1720         rrd_ring->dma = 0;
1721 }
1722
1723 s32 atl1_up(struct atl1_adapter *adapter)
1724 {
1725         struct net_device *netdev = adapter->netdev;
1726         int err;
1727         int irq_flags = IRQF_SAMPLE_RANDOM;
1728
1729         /* hardware has been reset, we need to reload some things */
1730         atl1_set_multi(netdev);
1731         atl1_restore_vlan(adapter);
1732         err = atl1_alloc_rx_buffers(adapter);
1733         if (unlikely(!err))             /* no RX BUFFER allocated */
1734                 return -ENOMEM;
1735
1736         if (unlikely(atl1_configure(adapter))) {
1737                 err = -EIO;
1738                 goto err_up;
1739         }
1740
1741         err = pci_enable_msi(adapter->pdev);
1742         if (err) {
1743                 dev_info(&adapter->pdev->dev,
1744                         "Unable to enable MSI: %d\n", err);
1745                 irq_flags |= IRQF_SHARED;
1746         }
1747
1748         err = request_irq(adapter->pdev->irq, &atl1_intr, irq_flags,
1749                         netdev->name, netdev);
1750         if (unlikely(err))
1751                 goto err_up;
1752
1753         mod_timer(&adapter->watchdog_timer, jiffies);
1754         atl1_irq_enable(adapter);
1755         atl1_check_link(adapter);
1756         return 0;
1757
1758         /* FIXME: unreachable code! -- CHS */
1759         /* free irq disable any interrupt */
1760         iowrite32(0, adapter->hw.hw_addr + REG_IMR);
1761         free_irq(adapter->pdev->irq, netdev);
1762
1763 err_up:
1764         pci_disable_msi(adapter->pdev);
1765         /* free rx_buffers */
1766         atl1_clean_rx_ring(adapter);
1767         return err;
1768 }
1769
1770 void atl1_down(struct atl1_adapter *adapter)
1771 {
1772         struct net_device *netdev = adapter->netdev;
1773
1774         del_timer_sync(&adapter->watchdog_timer);
1775         del_timer_sync(&adapter->phy_config_timer);
1776         adapter->phy_timer_pending = false;
1777
1778         atl1_irq_disable(adapter);
1779         free_irq(adapter->pdev->irq, netdev);
1780         pci_disable_msi(adapter->pdev);
1781         atl1_reset_hw(&adapter->hw);
1782         adapter->cmb.cmb->int_stats = 0;
1783
1784         adapter->link_speed = SPEED_0;
1785         adapter->link_duplex = -1;
1786         netif_carrier_off(netdev);
1787         netif_stop_queue(netdev);
1788
1789         atl1_clean_tx_ring(adapter);
1790         atl1_clean_rx_ring(adapter);
1791 }
1792
1793 /*
1794  * atl1_change_mtu - Change the Maximum Transfer Unit
1795  * @netdev: network interface device structure
1796  * @new_mtu: new value for maximum frame size
1797  *
1798  * Returns 0 on success, negative on failure
1799  */
1800 static int atl1_change_mtu(struct net_device *netdev, int new_mtu)
1801 {
1802         struct atl1_adapter *adapter = netdev_priv(netdev);
1803         int old_mtu = netdev->mtu;
1804         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1805
1806         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
1807             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
1808                 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
1809                 return -EINVAL;
1810         }
1811
1812         adapter->hw.max_frame_size = max_frame;
1813         adapter->hw.tx_jumbo_task_th = (max_frame + 7) >> 3;
1814         adapter->rx_buffer_len = (max_frame + 7) & ~7;
1815         adapter->hw.rx_jumbo_th = adapter->rx_buffer_len / 8;
1816
1817         netdev->mtu = new_mtu;
1818         if ((old_mtu != new_mtu) && netif_running(netdev)) {
1819                 atl1_down(adapter);
1820                 atl1_up(adapter);
1821         }
1822
1823         return 0;
1824 }
1825
1826 /*
1827  * atl1_set_mac - Change the Ethernet Address of the NIC
1828  * @netdev: network interface device structure
1829  * @p: pointer to an address structure
1830  *
1831  * Returns 0 on success, negative on failure
1832  */
1833 static int atl1_set_mac(struct net_device *netdev, void *p)
1834 {
1835         struct atl1_adapter *adapter = netdev_priv(netdev);
1836         struct sockaddr *addr = p;
1837
1838         if (netif_running(netdev))
1839                 return -EBUSY;
1840
1841         if (!is_valid_ether_addr(addr->sa_data))
1842                 return -EADDRNOTAVAIL;
1843
1844         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1845         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
1846
1847         atl1_set_mac_addr(&adapter->hw);
1848         return 0;
1849 }
1850
1851 /*
1852  * atl1_watchdog - Timer Call-back
1853  * @data: pointer to netdev cast into an unsigned long
1854  */
1855 static void atl1_watchdog(unsigned long data)
1856 {
1857         struct atl1_adapter *adapter = (struct atl1_adapter *)data;
1858
1859         /* Reset the timer */
1860         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1861 }
1862
1863 static int mdio_read(struct net_device *netdev, int phy_id, int reg_num)
1864 {
1865         struct atl1_adapter *adapter = netdev_priv(netdev);
1866         u16 result;
1867
1868         atl1_read_phy_reg(&adapter->hw, reg_num & 0x1f, &result);
1869
1870         return result;
1871 }
1872
1873 static void mdio_write(struct net_device *netdev, int phy_id, int reg_num, int val)
1874 {
1875         struct atl1_adapter *adapter = netdev_priv(netdev);
1876
1877         atl1_write_phy_reg(&adapter->hw, reg_num, val);
1878 }
1879
1880 /*
1881  * atl1_mii_ioctl -
1882  * @netdev:
1883  * @ifreq:
1884  * @cmd:
1885  */
1886 static int atl1_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1887 {
1888         struct atl1_adapter *adapter = netdev_priv(netdev);
1889         unsigned long flags;
1890         int retval;
1891
1892         if (!netif_running(netdev))
1893                 return -EINVAL;
1894
1895         spin_lock_irqsave(&adapter->lock, flags);
1896         retval = generic_mii_ioctl(&adapter->mii, if_mii(ifr), cmd, NULL);
1897         spin_unlock_irqrestore(&adapter->lock, flags);
1898
1899         return retval;
1900 }
1901
1902 /*
1903  * atl1_ioctl -
1904  * @netdev:
1905  * @ifreq:
1906  * @cmd:
1907  */
1908 static int atl1_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1909 {
1910         switch (cmd) {
1911         case SIOCGMIIPHY:
1912         case SIOCGMIIREG:
1913         case SIOCSMIIREG:
1914                 return atl1_mii_ioctl(netdev, ifr, cmd);
1915         default:
1916                 return -EOPNOTSUPP;
1917         }
1918 }
1919
1920 /*
1921  * atl1_tx_timeout - Respond to a Tx Hang
1922  * @netdev: network interface device structure
1923  */
1924 static void atl1_tx_timeout(struct net_device *netdev)
1925 {
1926         struct atl1_adapter *adapter = netdev_priv(netdev);
1927         /* Do the reset outside of interrupt context */
1928         schedule_work(&adapter->tx_timeout_task);
1929 }
1930
1931 /*
1932  * atl1_phy_config - Timer Call-back
1933  * @data: pointer to netdev cast into an unsigned long
1934  */
1935 static void atl1_phy_config(unsigned long data)
1936 {
1937         struct atl1_adapter *adapter = (struct atl1_adapter *)data;
1938         struct atl1_hw *hw = &adapter->hw;
1939         unsigned long flags;
1940
1941         spin_lock_irqsave(&adapter->lock, flags);
1942         adapter->phy_timer_pending = false;
1943         atl1_write_phy_reg(hw, MII_ADVERTISE, hw->mii_autoneg_adv_reg);
1944         atl1_write_phy_reg(hw, MII_AT001_CR, hw->mii_1000t_ctrl_reg);
1945         atl1_write_phy_reg(hw, MII_BMCR, MII_CR_RESET | MII_CR_AUTO_NEG_EN);
1946         spin_unlock_irqrestore(&adapter->lock, flags);
1947 }
1948
1949 int atl1_reset(struct atl1_adapter *adapter)
1950 {
1951         int ret;
1952
1953         ret = atl1_reset_hw(&adapter->hw);
1954         if (ret != ATL1_SUCCESS)
1955                 return ret;
1956         return atl1_init_hw(&adapter->hw);
1957 }
1958
1959 /*
1960  * atl1_open - Called when a network interface is made active
1961  * @netdev: network interface device structure
1962  *
1963  * Returns 0 on success, negative value on failure
1964  *
1965  * The open entry point is called when a network interface is made
1966  * active by the system (IFF_UP).  At this point all resources needed
1967  * for transmit and receive operations are allocated, the interrupt
1968  * handler is registered with the OS, the watchdog timer is started,
1969  * and the stack is notified that the interface is ready.
1970  */
1971 static int atl1_open(struct net_device *netdev)
1972 {
1973         struct atl1_adapter *adapter = netdev_priv(netdev);
1974         int err;
1975
1976         /* allocate transmit descriptors */
1977         err = atl1_setup_ring_resources(adapter);
1978         if (err)
1979                 return err;
1980
1981         err = atl1_up(adapter);
1982         if (err)
1983                 goto err_up;
1984
1985         return 0;
1986
1987 err_up:
1988         atl1_reset(adapter);
1989         return err;
1990 }
1991
1992 /*
1993  * atl1_close - Disables a network interface
1994  * @netdev: network interface device structure
1995  *
1996  * Returns 0, this is not allowed to fail
1997  *
1998  * The close entry point is called when an interface is de-activated
1999  * by the OS.  The hardware is still under the drivers control, but
2000  * needs to be disabled.  A global MAC reset is issued to stop the
2001  * hardware, and all transmit and receive resources are freed.
2002  */
2003 static int atl1_close(struct net_device *netdev)
2004 {
2005         struct atl1_adapter *adapter = netdev_priv(netdev);
2006         atl1_down(adapter);
2007         atl1_free_ring_resources(adapter);
2008         return 0;
2009 }
2010
2011 #ifdef CONFIG_NET_POLL_CONTROLLER
2012 static void atl1_poll_controller(struct net_device *netdev)
2013 {
2014         disable_irq(netdev->irq);
2015         atl1_intr(netdev->irq, netdev);
2016         enable_irq(netdev->irq);
2017 }
2018 #endif
2019
2020 /*
2021  * If TPD Buffer size equal to 0, PCIE DMAR_TO_INT
2022  * will assert. We do soft reset <0x1400=1> according
2023  * with the SPEC. BUT, it seemes that PCIE or DMA
2024  * state-machine will not be reset. DMAR_TO_INT will
2025  * assert again and again.
2026  */
2027 static void atl1_tx_timeout_task(struct work_struct *work)
2028 {
2029         struct atl1_adapter *adapter =
2030                 container_of(work, struct atl1_adapter, tx_timeout_task);
2031         struct net_device *netdev = adapter->netdev;
2032
2033         netif_device_detach(netdev);
2034         atl1_down(adapter);
2035         atl1_up(adapter);
2036         netif_device_attach(netdev);
2037 }
2038
2039 /*
2040  * atl1_link_chg_task - deal with link change event Out of interrupt context
2041  */
2042 static void atl1_link_chg_task(struct work_struct *work)
2043 {
2044         struct atl1_adapter *adapter =
2045                container_of(work, struct atl1_adapter, link_chg_task);
2046         unsigned long flags;
2047
2048         spin_lock_irqsave(&adapter->lock, flags);
2049         atl1_check_link(adapter);
2050         spin_unlock_irqrestore(&adapter->lock, flags);
2051 }
2052
2053 /*
2054  * atl1_pcie_patch - Patch for PCIE module
2055  */
2056 static void atl1_pcie_patch(struct atl1_adapter *adapter)
2057 {
2058         u32 value;
2059         value = 0x6500;
2060         iowrite32(value, adapter->hw.hw_addr + 0x12FC);
2061         /* pcie flow control mode change */
2062         value = ioread32(adapter->hw.hw_addr + 0x1008);
2063         value |= 0x8000;
2064         iowrite32(value, adapter->hw.hw_addr + 0x1008);
2065 }
2066
2067 /*
2068  * When ACPI resume on some VIA MotherBoard, the Interrupt Disable bit/0x400
2069  * on PCI Command register is disable.
2070  * The function enable this bit.
2071  * Brackett, 2006/03/15
2072  */
2073 static void atl1_via_workaround(struct atl1_adapter *adapter)
2074 {
2075         unsigned long value;
2076
2077         value = ioread16(adapter->hw.hw_addr + PCI_COMMAND);
2078         if (value & PCI_COMMAND_INTX_DISABLE)
2079                 value &= ~PCI_COMMAND_INTX_DISABLE;
2080         iowrite32(value, adapter->hw.hw_addr + PCI_COMMAND);
2081 }
2082
2083 /*
2084  * atl1_probe - Device Initialization Routine
2085  * @pdev: PCI device information struct
2086  * @ent: entry in atl1_pci_tbl
2087  *
2088  * Returns 0 on success, negative on failure
2089  *
2090  * atl1_probe initializes an adapter identified by a pci_dev structure.
2091  * The OS initialization, configuring of the adapter private structure,
2092  * and a hardware reset occur.
2093  */
2094 static int __devinit atl1_probe(struct pci_dev *pdev,
2095                               const struct pci_device_id *ent)
2096 {
2097         struct net_device *netdev;
2098         struct atl1_adapter *adapter;
2099         static int cards_found = 0;
2100         bool pci_using_64 = true;
2101         int err;
2102
2103         err = pci_enable_device(pdev);
2104         if (err)
2105                 return err;
2106
2107         err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
2108         if (err) {
2109                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
2110                 if (err) {
2111                         dev_err(&pdev->dev, "no usable DMA configuration\n");
2112                         goto err_dma;
2113                 }
2114                 pci_using_64 = false;
2115         }
2116         /* Mark all PCI regions associated with PCI device
2117          * pdev as being reserved by owner atl1_driver_name
2118          */
2119         err = pci_request_regions(pdev, atl1_driver_name);
2120         if (err)
2121                 goto err_request_regions;
2122
2123         /* Enables bus-mastering on the device and calls
2124          * pcibios_set_master to do the needed arch specific settings
2125          */
2126         pci_set_master(pdev);
2127
2128         netdev = alloc_etherdev(sizeof(struct atl1_adapter));
2129         if (!netdev) {
2130                 err = -ENOMEM;
2131                 goto err_alloc_etherdev;
2132         }
2133         SET_MODULE_OWNER(netdev);
2134         SET_NETDEV_DEV(netdev, &pdev->dev);
2135
2136         pci_set_drvdata(pdev, netdev);
2137         adapter = netdev_priv(netdev);
2138         adapter->netdev = netdev;
2139         adapter->pdev = pdev;
2140         adapter->hw.back = adapter;
2141
2142         adapter->hw.hw_addr = pci_iomap(pdev, 0, 0);
2143         if (!adapter->hw.hw_addr) {
2144                 err = -EIO;
2145                 goto err_pci_iomap;
2146         }
2147         /* get device revision number */
2148         adapter->hw.dev_rev = ioread16(adapter->hw.hw_addr +
2149                                         (REG_MASTER_CTRL + 2));
2150         dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
2151
2152         /* set default ring resource counts */
2153         adapter->rfd_ring.count = adapter->rrd_ring.count = ATL1_DEFAULT_RFD;
2154         adapter->tpd_ring.count = ATL1_DEFAULT_TPD;
2155
2156         adapter->mii.dev = netdev;
2157         adapter->mii.mdio_read = mdio_read;
2158         adapter->mii.mdio_write = mdio_write;
2159         adapter->mii.phy_id_mask = 0x1f;
2160         adapter->mii.reg_num_mask = 0x1f;
2161
2162         netdev->open = &atl1_open;
2163         netdev->stop = &atl1_close;
2164         netdev->hard_start_xmit = &atl1_xmit_frame;
2165         netdev->get_stats = &atl1_get_stats;
2166         netdev->set_multicast_list = &atl1_set_multi;
2167         netdev->set_mac_address = &atl1_set_mac;
2168         netdev->change_mtu = &atl1_change_mtu;
2169         netdev->do_ioctl = &atl1_ioctl;
2170         netdev->tx_timeout = &atl1_tx_timeout;
2171         netdev->watchdog_timeo = 5 * HZ;
2172 #ifdef CONFIG_NET_POLL_CONTROLLER
2173         netdev->poll_controller = atl1_poll_controller;
2174 #endif
2175         netdev->vlan_rx_register = atl1_vlan_rx_register;
2176
2177         netdev->ethtool_ops = &atl1_ethtool_ops;
2178         adapter->bd_number = cards_found;
2179         adapter->pci_using_64 = pci_using_64;
2180
2181         /* setup the private structure */
2182         err = atl1_sw_init(adapter);
2183         if (err)
2184                 goto err_common;
2185
2186         netdev->features = NETIF_F_HW_CSUM;
2187         netdev->features |= NETIF_F_SG;
2188         netdev->features |= (NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX);
2189
2190         /*
2191          * FIXME - Until tso performance gets fixed, disable the feature.
2192          * Enable it with ethtool -K if desired.
2193          */
2194         /* netdev->features |= NETIF_F_TSO; */
2195
2196         if (pci_using_64)
2197                 netdev->features |= NETIF_F_HIGHDMA;
2198
2199         netdev->features |= NETIF_F_LLTX;
2200
2201         /*
2202          * patch for some L1 of old version,
2203          * the final version of L1 may not need these
2204          * patches
2205          */
2206         /* atl1_pcie_patch(adapter); */
2207
2208         /* really reset GPHY core */
2209         iowrite16(0, adapter->hw.hw_addr + REG_GPHY_ENABLE);
2210
2211         /*
2212          * reset the controller to
2213          * put the device in a known good starting state
2214          */
2215         if (atl1_reset_hw(&adapter->hw)) {
2216                 err = -EIO;
2217                 goto err_common;
2218         }
2219
2220         /* copy the MAC address out of the EEPROM */
2221         atl1_read_mac_addr(&adapter->hw);
2222         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2223
2224         if (!is_valid_ether_addr(netdev->dev_addr)) {
2225                 err = -EIO;
2226                 goto err_common;
2227         }
2228
2229         atl1_check_options(adapter);
2230
2231         /* pre-init the MAC, and setup link */
2232         err = atl1_init_hw(&adapter->hw);
2233         if (err) {
2234                 err = -EIO;
2235                 goto err_common;
2236         }
2237
2238         atl1_pcie_patch(adapter);
2239         /* assume we have no link for now */
2240         netif_carrier_off(netdev);
2241         netif_stop_queue(netdev);
2242
2243         init_timer(&adapter->watchdog_timer);
2244         adapter->watchdog_timer.function = &atl1_watchdog;
2245         adapter->watchdog_timer.data = (unsigned long)adapter;
2246
2247         init_timer(&adapter->phy_config_timer);
2248         adapter->phy_config_timer.function = &atl1_phy_config;
2249         adapter->phy_config_timer.data = (unsigned long)adapter;
2250         adapter->phy_timer_pending = false;
2251
2252         INIT_WORK(&adapter->tx_timeout_task, atl1_tx_timeout_task);
2253
2254         INIT_WORK(&adapter->link_chg_task, atl1_link_chg_task);
2255
2256         INIT_WORK(&adapter->pcie_dma_to_rst_task, atl1_tx_timeout_task);
2257
2258         err = register_netdev(netdev);
2259         if (err)
2260                 goto err_common;
2261
2262         cards_found++;
2263         atl1_via_workaround(adapter);
2264         return 0;
2265
2266 err_common:
2267         pci_iounmap(pdev, adapter->hw.hw_addr);
2268 err_pci_iomap:
2269         free_netdev(netdev);
2270 err_alloc_etherdev:
2271         pci_release_regions(pdev);
2272 err_dma:
2273 err_request_regions:
2274         pci_disable_device(pdev);
2275         return err;
2276 }
2277
2278 /*
2279  * atl1_remove - Device Removal Routine
2280  * @pdev: PCI device information struct
2281  *
2282  * atl1_remove is called by the PCI subsystem to alert the driver
2283  * that it should release a PCI device.  The could be caused by a
2284  * Hot-Plug event, or because the driver is going to be removed from
2285  * memory.
2286  */
2287 static void __devexit atl1_remove(struct pci_dev *pdev)
2288 {
2289         struct net_device *netdev = pci_get_drvdata(pdev);
2290         struct atl1_adapter *adapter;
2291         /* Device not available. Return. */
2292         if (!netdev)
2293                 return;
2294
2295         adapter = netdev_priv(netdev);
2296
2297         /* Some atl1 boards lack persistent storage for their MAC, and get it
2298          * from the BIOS during POST.  If we've been messing with the MAC
2299          * address, we need to save the permanent one.
2300          */
2301         if (memcmp(adapter->hw.mac_addr, adapter->hw.perm_mac_addr, ETH_ALEN)) {
2302                 memcpy(adapter->hw.mac_addr, adapter->hw.perm_mac_addr, ETH_ALEN);
2303                 atl1_set_mac_addr(&adapter->hw);
2304         }
2305
2306         iowrite16(0, adapter->hw.hw_addr + REG_GPHY_ENABLE);
2307         unregister_netdev(netdev);
2308         pci_iounmap(pdev, adapter->hw.hw_addr);
2309         pci_release_regions(pdev);
2310         free_netdev(netdev);
2311         pci_disable_device(pdev);
2312 }
2313
2314 #ifdef CONFIG_PM
2315 static int atl1_suspend(struct pci_dev *pdev, pm_message_t state)
2316 {
2317         struct net_device *netdev = pci_get_drvdata(pdev);
2318         struct atl1_adapter *adapter = netdev_priv(netdev);
2319         struct atl1_hw *hw = &adapter->hw;
2320         u32 ctrl = 0;
2321         u32 wufc = adapter->wol;
2322
2323         netif_device_detach(netdev);
2324         if (netif_running(netdev))
2325                 atl1_down(adapter);
2326
2327         atl1_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
2328         atl1_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
2329         if (ctrl & BMSR_LSTATUS)
2330                 wufc &= ~ATL1_WUFC_LNKC;
2331
2332         /* reduce speed to 10/100M */
2333         if (wufc) {
2334                 atl1_phy_enter_power_saving(hw);
2335                 /* if resume, let driver to re- setup link */
2336                 hw->phy_configured = false;
2337                 atl1_set_mac_addr(hw);
2338                 atl1_set_multi(netdev);
2339
2340                 ctrl = 0;
2341                 /* turn on magic packet wol */
2342                 if (wufc & ATL1_WUFC_MAG)
2343                         ctrl = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2344
2345                 /* turn on Link change WOL */
2346                 if (wufc & ATL1_WUFC_LNKC)
2347                         ctrl |= (WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN);
2348                 iowrite32(ctrl, hw->hw_addr + REG_WOL_CTRL);
2349
2350                 /* turn on all-multi mode if wake on multicast is enabled */
2351                 ctrl = ioread32(hw->hw_addr + REG_MAC_CTRL);
2352                 ctrl &= ~MAC_CTRL_DBG;
2353                 ctrl &= ~MAC_CTRL_PROMIS_EN;
2354                 if (wufc & ATL1_WUFC_MC)
2355                         ctrl |= MAC_CTRL_MC_ALL_EN;
2356                 else
2357                         ctrl &= ~MAC_CTRL_MC_ALL_EN;
2358
2359                 /* turn on broadcast mode if wake on-BC is enabled */
2360                 if (wufc & ATL1_WUFC_BC)
2361                         ctrl |= MAC_CTRL_BC_EN;
2362                 else
2363                         ctrl &= ~MAC_CTRL_BC_EN;
2364
2365                 /* enable RX */
2366                 ctrl |= MAC_CTRL_RX_EN;
2367                 iowrite32(ctrl, hw->hw_addr + REG_MAC_CTRL);
2368                 pci_enable_wake(pdev, PCI_D3hot, 1);
2369                 pci_enable_wake(pdev, PCI_D3cold, 1);   /* 4 == D3 cold */
2370         } else {
2371                 iowrite32(0, hw->hw_addr + REG_WOL_CTRL);
2372                 pci_enable_wake(pdev, PCI_D3hot, 0);
2373                 pci_enable_wake(pdev, PCI_D3cold, 0);   /* 4 == D3 cold */
2374         }
2375
2376         pci_save_state(pdev);
2377         pci_disable_device(pdev);
2378
2379         pci_set_power_state(pdev, PCI_D3hot);
2380
2381         return 0;
2382 }
2383
2384 static int atl1_resume(struct pci_dev *pdev)
2385 {
2386         struct net_device *netdev = pci_get_drvdata(pdev);
2387         struct atl1_adapter *adapter = netdev_priv(netdev);
2388         u32 ret_val;
2389
2390         pci_set_power_state(pdev, 0);
2391         pci_restore_state(pdev);
2392
2393         ret_val = pci_enable_device(pdev);
2394         pci_enable_wake(pdev, PCI_D3hot, 0);
2395         pci_enable_wake(pdev, PCI_D3cold, 0);
2396
2397         iowrite32(0, adapter->hw.hw_addr + REG_WOL_CTRL);
2398         atl1_reset(adapter);
2399
2400         if (netif_running(netdev))
2401                 atl1_up(adapter);
2402         netif_device_attach(netdev);
2403
2404         atl1_via_workaround(adapter);
2405
2406         return 0;
2407 }
2408 #else
2409 #define atl1_suspend NULL
2410 #define atl1_resume NULL
2411 #endif
2412
2413 static struct pci_driver atl1_driver = {
2414         .name = atl1_driver_name,
2415         .id_table = atl1_pci_tbl,
2416         .probe = atl1_probe,
2417         .remove = __devexit_p(atl1_remove),
2418         /* Power Managment Hooks */
2419         /* probably broken right now -- CHS */
2420         .suspend = atl1_suspend,
2421         .resume = atl1_resume
2422 };
2423
2424 /*
2425  * atl1_exit_module - Driver Exit Cleanup Routine
2426  *
2427  * atl1_exit_module is called just before the driver is removed
2428  * from memory.
2429  */
2430 static void __exit atl1_exit_module(void)
2431 {
2432         pci_unregister_driver(&atl1_driver);
2433 }
2434
2435 /*
2436  * atl1_init_module - Driver Registration Routine
2437  *
2438  * atl1_init_module is the first routine called when the driver is
2439  * loaded. All it does is register with the PCI subsystem.
2440  */
2441 static int __init atl1_init_module(void)
2442 {
2443         return pci_register_driver(&atl1_driver);
2444 }
2445
2446 module_init(atl1_init_module);
2447 module_exit(atl1_exit_module);