drivers/net/pasemi_mac.c

   1 /*
   2  * Copyright (C) 2006-2007 PA Semi, Inc
   3  *
   4  * Driver for the PA Semi PWRficient onchip 1G/10G Ethernet MACs
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  18  */
  19
  20 #include <linux/init.h>
  21 #include <linux/module.h>
  22 #include <linux/pci.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/dmaengine.h>
  25 #include <linux/delay.h>
  26 #include <linux/netdevice.h>
  27 #include <linux/etherdevice.h>
  28 #include <asm/dma-mapping.h>
  29 #include <linux/in.h>
  30 #include <linux/skbuff.h>
  31
  32 #include <linux/ip.h>
  33 #include <linux/tcp.h>
  34 #include <net/checksum.h>
  35
  36 #include <asm/irq.h>
  37
  38 #include "pasemi_mac.h"
  39
  40
  41 /* TODO list
  42  *
  43  * - Get rid of pci_{read,write}_config(), map registers with ioremap
  44  *   for performance
  45  * - PHY support
  46  * - Multicast support
  47  * - Large MTU support
  48  * - Other performance improvements
  49  */
  50
  51
  52 /* Must be a power of two */
  53 #define RX_RING_SIZE 512
  54 #define TX_RING_SIZE 512
  55
  56 #define DEFAULT_MSG_ENABLE        \
  57         (NETIF_MSG_DRV          | \
  58          NETIF_MSG_PROBE        | \
  59          NETIF_MSG_LINK         | \
  60          NETIF_MSG_TIMER        | \
  61          NETIF_MSG_IFDOWN       | \
  62          NETIF_MSG_IFUP         | \
  63          NETIF_MSG_RX_ERR       | \
  64          NETIF_MSG_TX_ERR)
  65
  66 #define TX_DESC(mac, num)       ((mac)->tx->desc[(num) & (TX_RING_SIZE-1)])
  67 #define TX_DESC_INFO(mac, num)  ((mac)->tx->desc_info[(num) & (TX_RING_SIZE-1)])
  68 #define RX_DESC(mac, num)       ((mac)->rx->desc[(num) & (RX_RING_SIZE-1)])
  69 #define RX_DESC_INFO(mac, num)  ((mac)->rx->desc_info[(num) & (RX_RING_SIZE-1)])
  70 #define RX_BUFF(mac, num)       ((mac)->rx->buffers[(num) & (RX_RING_SIZE-1)])
  71
  72 #define BUF_SIZE 1646 /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
  73
  74 MODULE_LICENSE("GPL");
  75 MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
  76 MODULE_DESCRIPTION("PA Semi PWRficient Ethernet driver");
  77
  78 static int debug = -1;  /* -1 == use DEFAULT_MSG_ENABLE as value */
  79 module_param(debug, int, 0);
  80 MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value");
  81
  82 static struct pasdma_status *dma_status;
  83
  84 static int pasemi_get_mac_addr(struct pasemi_mac *mac)
  85 {
  86         struct pci_dev *pdev = mac->pdev;
  87         struct device_node *dn = pci_device_to_OF_node(pdev);
  88         int len;
  89         const u8 *maddr;
  90         u8 addr[6];
  91
  92         if (!dn) {
  93                 dev_dbg(&pdev->dev,
  94                           "No device node for mac, not configuring\n");
  95                 return -ENOENT;
  96         }
  97
  98         maddr = of_get_property(dn, "local-mac-address", &len);
  99
 100         if (maddr && len == 6) {
 101                 memcpy(mac->mac_addr, maddr, 6);
 102                 return 0;
 103         }
 104
 105         /* Some old versions of firmware mistakenly uses mac-address
 106          * (and as a string) instead of a byte array in local-mac-address.
 107          */
 108
 109         if (maddr == NULL)
 110                 maddr = of_get_property(dn, "mac-address", NULL);
 111
 112         if (maddr == NULL) {
 113                 dev_warn(&pdev->dev,
 114                          "no mac address in device tree, not configuring\n");
 115                 return -ENOENT;
 116         }
 117
 118
 119         if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0],
 120                    &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) {
 121                 dev_warn(&pdev->dev,
 122                          "can't parse mac address, not configuring\n");
 123                 return -EINVAL;
 124         }
 125
 126         memcpy(mac->mac_addr, addr, 6);
 127
 128         return 0;
 129 }
 130
 131 static int pasemi_mac_setup_rx_resources(struct net_device *dev)
 132 {
 133         struct pasemi_mac_rxring *ring;
 134         struct pasemi_mac *mac = netdev_priv(dev);
 135         int chan_id = mac->dma_rxch;
 136
 137         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
 138
 139         if (!ring)
 140                 goto out_ring;
 141
 142         spin_lock_init(&ring->lock);
 143
 144         ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
 145                                   RX_RING_SIZE, GFP_KERNEL);
 146
 147         if (!ring->desc_info)
 148                 goto out_desc_info;
 149
 150         /* Allocate descriptors */
 151         ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
 152                                         RX_RING_SIZE *
 153                                         sizeof(struct pas_dma_xct_descr),
 154                                         &ring->dma, GFP_KERNEL);
 155
 156         if (!ring->desc)
 157                 goto out_desc;
 158
 159         memset(ring->desc, 0, RX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
 160
 161         ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev,
 162                                            RX_RING_SIZE * sizeof(u64),
 163                                            &ring->buf_dma, GFP_KERNEL);
 164         if (!ring->buffers)
 165                 goto out_buffers;
 166
 167         memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64));
 168
 169         pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXCHAN_BASEL(chan_id),
 170                                PAS_DMA_RXCHAN_BASEL_BRBL(ring->dma));
 171
 172         pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXCHAN_BASEU(chan_id),
 173                                PAS_DMA_RXCHAN_BASEU_BRBH(ring->dma >> 32) |
 174                                PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 2));
 175
 176         pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXCHAN_CFG(chan_id),
 177                                PAS_DMA_RXCHAN_CFG_HBU(1));
 178
 179         pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXINT_BASEL(mac->dma_if),
 180                                PAS_DMA_RXINT_BASEL_BRBL(__pa(ring->buffers)));
 181
 182         pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXINT_BASEU(mac->dma_if),
 183                                PAS_DMA_RXINT_BASEU_BRBH(__pa(ring->buffers) >> 32) |
 184                                PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
 185
 186         ring->next_to_fill = 0;
 187         ring->next_to_clean = 0;
 188
 189         snprintf(ring->irq_name, sizeof(ring->irq_name),
 190                  "%s rx", dev->name);
 191         mac->rx = ring;
 192
 193         return 0;
 194
 195 out_buffers:
 196         dma_free_coherent(&mac->dma_pdev->dev,
 197                           RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 198                           mac->rx->desc, mac->rx->dma);
 199 out_desc:
 200         kfree(ring->desc_info);
 201 out_desc_info:
 202         kfree(ring);
 203 out_ring:
 204         return -ENOMEM;
 205 }
 206
 207
 208 static int pasemi_mac_setup_tx_resources(struct net_device *dev)
 209 {
 210         struct pasemi_mac *mac = netdev_priv(dev);
 211         u32 val;
 212         int chan_id = mac->dma_txch;
 213         struct pasemi_mac_txring *ring;
 214
 215         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
 216         if (!ring)
 217                 goto out_ring;
 218
 219         spin_lock_init(&ring->lock);
 220
 221         ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
 222                                   TX_RING_SIZE, GFP_KERNEL);
 223         if (!ring->desc_info)
 224                 goto out_desc_info;
 225
 226         /* Allocate descriptors */
 227         ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
 228                                         TX_RING_SIZE *
 229                                         sizeof(struct pas_dma_xct_descr),
 230                                         &ring->dma, GFP_KERNEL);
 231         if (!ring->desc)
 232                 goto out_desc;
 233
 234         memset(ring->desc, 0, TX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
 235
 236         pci_write_config_dword(mac->dma_pdev, PAS_DMA_TXCHAN_BASEL(chan_id),
 237                                PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma));
 238         val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32);
 239         val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 2);
 240
 241         pci_write_config_dword(mac->dma_pdev, PAS_DMA_TXCHAN_BASEU(chan_id), val);
 242
 243         pci_write_config_dword(mac->dma_pdev, PAS_DMA_TXCHAN_CFG(chan_id),
 244                                PAS_DMA_TXCHAN_CFG_TY_IFACE |
 245                                PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
 246                                PAS_DMA_TXCHAN_CFG_UP |
 247                                PAS_DMA_TXCHAN_CFG_WT(2));
 248
 249         ring->next_to_use = 0;
 250         ring->next_to_clean = 0;
 251
 252         snprintf(ring->irq_name, sizeof(ring->irq_name),
 253                  "%s tx", dev->name);
 254         mac->tx = ring;
 255
 256         return 0;
 257
 258 out_desc:
 259         kfree(ring->desc_info);
 260 out_desc_info:
 261         kfree(ring);
 262 out_ring:
 263         return -ENOMEM;
 264 }
 265
 266 static void pasemi_mac_free_tx_resources(struct net_device *dev)
 267 {
 268         struct pasemi_mac *mac = netdev_priv(dev);
 269         unsigned int i;
 270         struct pasemi_mac_buffer *info;
 271         struct pas_dma_xct_descr *dp;
 272
 273         for (i = 0; i < TX_RING_SIZE; i++) {
 274                 info = &TX_DESC_INFO(mac, i);
 275                 dp = &TX_DESC(mac, i);
 276                 if (info->dma) {
 277                         if (info->skb) {
 278                                 pci_unmap_single(mac->dma_pdev,
 279                                                  info->dma,
 280                                                  info->skb->len,
 281                                                  PCI_DMA_TODEVICE);
 282                                 dev_kfree_skb_any(info->skb);
 283                         }
 284                         info->dma = 0;
 285                         info->skb = NULL;
 286                         dp->mactx = 0;
 287                         dp->ptr = 0;
 288                 }
 289         }
 290
 291         dma_free_coherent(&mac->dma_pdev->dev,
 292                           TX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 293                           mac->tx->desc, mac->tx->dma);
 294
 295         kfree(mac->tx->desc_info);
 296         kfree(mac->tx);
 297         mac->tx = NULL;
 298 }
 299
 300 static void pasemi_mac_free_rx_resources(struct net_device *dev)
 301 {
 302         struct pasemi_mac *mac = netdev_priv(dev);
 303         unsigned int i;
 304         struct pasemi_mac_buffer *info;
 305         struct pas_dma_xct_descr *dp;
 306
 307         for (i = 0; i < RX_RING_SIZE; i++) {
 308                 info = &RX_DESC_INFO(mac, i);
 309                 dp = &RX_DESC(mac, i);
 310                 if (info->skb) {
 311                         if (info->dma) {
 312                                 pci_unmap_single(mac->dma_pdev,
 313                                                  info->dma,
 314                                                  info->skb->len,
 315                                                  PCI_DMA_FROMDEVICE);
 316                                 dev_kfree_skb_any(info->skb);
 317                         }
 318                         info->dma = 0;
 319                         info->skb = NULL;
 320                         dp->macrx = 0;
 321                         dp->ptr = 0;
 322                 }
 323         }
 324
 325         dma_free_coherent(&mac->dma_pdev->dev,
 326                           RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 327                           mac->rx->desc, mac->rx->dma);
 328
 329         dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
 330                           mac->rx->buffers, mac->rx->buf_dma);
 331
 332         kfree(mac->rx->desc_info);
 333         kfree(mac->rx);
 334         mac->rx = NULL;
 335 }
 336
 337 static void pasemi_mac_replenish_rx_ring(struct net_device *dev)
 338 {
 339         struct pasemi_mac *mac = netdev_priv(dev);
 340         unsigned int i;
 341         int start = mac->rx->next_to_fill;
 342         unsigned int limit, count;
 343
 344         limit = (mac->rx->next_to_clean + RX_RING_SIZE -
 345                  mac->rx->next_to_fill) & (RX_RING_SIZE - 1);
 346
 347         /* Check to see if we're doing first-time setup */
 348         if (unlikely(mac->rx->next_to_clean == 0 && mac->rx->next_to_fill == 0))
 349                 limit = RX_RING_SIZE;
 350
 351         if (limit <= 0)
 352                 return;
 353
 354         i = start;
 355         for (count = limit; count; count--) {
 356                 struct pasemi_mac_buffer *info = &RX_DESC_INFO(mac, i);
 357                 u64 *buff = &RX_BUFF(mac, i);
 358                 struct sk_buff *skb;
 359                 dma_addr_t dma;
 360
 361                 /* skb might still be in there for recycle on short receives */
 362                 if (info->skb)
 363                         skb = info->skb;
 364                 else
 365                         skb = dev_alloc_skb(BUF_SIZE);
 366
 367                 if (unlikely(!skb))
 368                         break;
 369
 370                 dma = pci_map_single(mac->dma_pdev, skb->data, skb->len,
 371                                      PCI_DMA_FROMDEVICE);
 372
 373                 if (unlikely(dma_mapping_error(dma))) {
 374                         dev_kfree_skb_irq(info->skb);
 375                         break;
 376                 }
 377
 378                 info->skb = skb;
 379                 info->dma = dma;
 380                 *buff = XCT_RXB_LEN(BUF_SIZE) | XCT_RXB_ADDR(dma);
 381                 i++;
 382         }
 383
 384         wmb();
 385
 386         pci_write_config_dword(mac->dma_pdev,
 387                                PAS_DMA_RXCHAN_INCR(mac->dma_rxch),
 388                                limit - count);
 389         pci_write_config_dword(mac->dma_pdev,
 390                                PAS_DMA_RXINT_INCR(mac->dma_if),
 391                                limit - count);
 392
 393         mac->rx->next_to_fill += limit - count;
 394 }
 395
 396 static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac)
 397 {
 398         unsigned int reg, pcnt;
 399         /* Re-enable packet count interrupts: finally
 400          * ack the packet count interrupt we got in rx_intr.
 401          */
 402
 403         pcnt = *mac->rx_status & PAS_STATUS_PCNT_M;
 404
 405         reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC;
 406
 407         pci_write_config_dword(mac->iob_pdev,
 408                                PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch),
 409                                reg);
 410 }
 411
 412 static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
 413 {
 414         unsigned int reg, pcnt;
 415
 416         /* Re-enable packet count interrupts */
 417         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
 418
 419         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
 420
 421         pci_write_config_dword(mac->iob_pdev,
 422                                PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
 423 }
 424
 425
 426 static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
 427 {
 428         unsigned int n;
 429         int count;
 430         struct pas_dma_xct_descr *dp;
 431         struct pasemi_mac_buffer *info;
 432         struct sk_buff *skb;
 433         unsigned int i, len;
 434         u64 macrx;
 435         dma_addr_t dma;
 436
 437         spin_lock(&mac->rx->lock);
 438
 439         n = mac->rx->next_to_clean;
 440
 441         for (count = limit; count; count--) {
 442
 443                 rmb();
 444
 445                 dp = &RX_DESC(mac, n);
 446                 macrx = dp->macrx;
 447
 448                 if (!(macrx & XCT_MACRX_O))
 449                         break;
 450
 451
 452                 info = NULL;
 453
 454                 /* We have to scan for our skb since there's no way
 455                  * to back-map them from the descriptor, and if we
 456                  * have several receive channels then they might not
 457                  * show up in the same order as they were put on the
 458                  * interface ring.
 459                  */
 460
 461                 dma = (dp->ptr & XCT_PTR_ADDR_M);
 462                 for (i = n; i < (n + RX_RING_SIZE); i++) {
 463                         info = &RX_DESC_INFO(mac, i);
 464                         if (info->dma == dma)
 465                                 break;
 466                 }
 467
 468                 skb = info->skb;
 469                 info->dma = 0;
 470
 471                 pci_unmap_single(mac->dma_pdev, dma, skb->len,
 472                                  PCI_DMA_FROMDEVICE);
 473
 474                 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
 475
 476                 if (len < 256) {
 477                         struct sk_buff *new_skb =
 478                             netdev_alloc_skb(mac->netdev, len + NET_IP_ALIGN);
 479                         if (new_skb) {
 480                                 skb_reserve(new_skb, NET_IP_ALIGN);
 481                                 memcpy(new_skb->data - NET_IP_ALIGN,
 482                                         skb->data - NET_IP_ALIGN,
 483                                         len + NET_IP_ALIGN);
 484                                 /* save the skb in buffer_info as good */
 485                                 skb = new_skb;
 486                         }
 487                         /* else just continue with the old one */
 488                 } else
 489                         info->skb = NULL;
 490
 491                 skb_put(skb, len);
 492
 493                 skb->protocol = eth_type_trans(skb, mac->netdev);
 494
 495                 if ((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK) {
 496                         skb->ip_summed = CHECKSUM_COMPLETE;
 497                         skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
 498                                            XCT_MACRX_CSUM_S;
 499                 } else
 500                         skb->ip_summed = CHECKSUM_NONE;
 501
 502                 mac->stats.rx_bytes += len;
 503                 mac->stats.rx_packets++;
 504
 505                 netif_receive_skb(skb);
 506
 507                 dp->ptr = 0;
 508                 dp->macrx = 0;
 509
 510                 n++;
 511         }
 512
 513         mac->rx->next_to_clean += limit - count;
 514         pasemi_mac_replenish_rx_ring(mac->netdev);
 515
 516         spin_unlock(&mac->rx->lock);
 517
 518         return count;
 519 }
 520
 521 static int pasemi_mac_clean_tx(struct pasemi_mac *mac)
 522 {
 523         int i;
 524         struct pasemi_mac_buffer *info;
 525         struct pas_dma_xct_descr *dp;
 526         int start, count;
 527         int flags;
 528
 529         spin_lock_irqsave(&mac->tx->lock, flags);
 530
 531         start = mac->tx->next_to_clean;
 532         count = 0;
 533
 534         for (i = start; i < mac->tx->next_to_use; i++) {
 535                 dp = &TX_DESC(mac, i);
 536                 if (!dp || (dp->mactx & XCT_MACTX_O))
 537                         break;
 538
 539                 count++;
 540
 541                 info = &TX_DESC_INFO(mac, i);
 542
 543                 pci_unmap_single(mac->dma_pdev, info->dma,
 544                                  info->skb->len, PCI_DMA_TODEVICE);
 545                 dev_kfree_skb_irq(info->skb);
 546
 547                 info->skb = NULL;
 548                 info->dma = 0;
 549                 dp->mactx = 0;
 550                 dp->ptr = 0;
 551         }
 552         mac->tx->next_to_clean += count;
 553         spin_unlock_irqrestore(&mac->tx->lock, flags);
 554
 555         netif_wake_queue(mac->netdev);
 556
 557         return count;
 558 }
 559
 560
 561 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
 562 {
 563         struct net_device *dev = data;
 564         struct pasemi_mac *mac = netdev_priv(dev);
 565         unsigned int reg;
 566
 567         if (!(*mac->rx_status & PAS_STATUS_CAUSE_M))
 568                 return IRQ_NONE;
 569
 570         if (*mac->rx_status & PAS_STATUS_ERROR)
 571                 printk("rx_status reported error\n");
 572
 573         /* Don't reset packet count so it won't fire again but clear
 574          * all others.
 575          */
 576
 577         pci_read_config_dword(mac->dma_pdev, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), &reg);
 578
 579         reg = 0;
 580         if (*mac->rx_status & PAS_STATUS_SOFT)
 581                 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
 582         if (*mac->rx_status & PAS_STATUS_ERROR)
 583                 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
 584         if (*mac->rx_status & PAS_STATUS_TIMER)
 585                 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
 586
 587         netif_rx_schedule(dev);
 588
 589         pci_write_config_dword(mac->iob_pdev,
 590                                PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
 591
 592
 593         return IRQ_HANDLED;
 594 }
 595
 596 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
 597 {
 598         struct net_device *dev = data;
 599         struct pasemi_mac *mac = netdev_priv(dev);
 600         unsigned int reg, pcnt;
 601
 602         if (!(*mac->tx_status & PAS_STATUS_CAUSE_M))
 603                 return IRQ_NONE;
 604
 605         pasemi_mac_clean_tx(mac);
 606
 607         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
 608
 609         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
 610
 611         if (*mac->tx_status & PAS_STATUS_SOFT)
 612                 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
 613         if (*mac->tx_status & PAS_STATUS_ERROR)
 614                 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
 615
 616         pci_write_config_dword(mac->iob_pdev,
 617                                PAS_IOB_DMA_TXCH_RESET(mac->dma_txch),
 618                                reg);
 619
 620         return IRQ_HANDLED;
 621 }
 622
 623 static void pasemi_adjust_link(struct net_device *dev)
 624 {
 625         struct pasemi_mac *mac = netdev_priv(dev);
 626         int msg;
 627         unsigned int flags;
 628         unsigned int new_flags;
 629
 630         if (!mac->phydev->link) {
 631                 /* If no link, MAC speed settings don't matter. Just report
 632                  * link down and return.
 633                  */
 634                 if (mac->link && netif_msg_link(mac))
 635                         printk(KERN_INFO "%s: Link is down.\n", dev->name);
 636
 637                 netif_carrier_off(dev);
 638                 mac->link = 0;
 639
 640                 return;
 641         } else
 642                 netif_carrier_on(dev);
 643
 644         pci_read_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, &flags);
 645         new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
 646                               PAS_MAC_CFG_PCFG_TSR_M);
 647
 648         if (!mac->phydev->duplex)
 649                 new_flags |= PAS_MAC_CFG_PCFG_HD;
 650
 651         switch (mac->phydev->speed) {
 652         case 1000:
 653                 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
 654                              PAS_MAC_CFG_PCFG_TSR_1G;
 655                 break;
 656         case 100:
 657                 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
 658                              PAS_MAC_CFG_PCFG_TSR_100M;
 659                 break;
 660         case 10:
 661                 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
 662                              PAS_MAC_CFG_PCFG_TSR_10M;
 663                 break;
 664         default:
 665                 printk("Unsupported speed %d\n", mac->phydev->speed);
 666         }
 667
 668         /* Print on link or speed/duplex change */
 669         msg = mac->link != mac->phydev->link || flags != new_flags;
 670
 671         mac->duplex = mac->phydev->duplex;
 672         mac->speed = mac->phydev->speed;
 673         mac->link = mac->phydev->link;
 674
 675         if (new_flags != flags)
 676                 pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, new_flags);
 677
 678         if (msg && netif_msg_link(mac))
 679                 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
 680                        dev->name, mac->speed, mac->duplex ? "full" : "half");
 681 }
 682
 683 static int pasemi_mac_phy_init(struct net_device *dev)
 684 {
 685         struct pasemi_mac *mac = netdev_priv(dev);
 686         struct device_node *dn, *phy_dn;
 687         struct phy_device *phydev;
 688         unsigned int phy_id;
 689         const phandle *ph;
 690         const unsigned int *prop;
 691         struct resource r;
 692         int ret;
 693
 694         dn = pci_device_to_OF_node(mac->pdev);
 695         ph = of_get_property(dn, "phy-handle", NULL);
 696         if (!ph)
 697                 return -ENODEV;
 698         phy_dn = of_find_node_by_phandle(*ph);
 699
 700         prop = of_get_property(phy_dn, "reg", NULL);
 701         ret = of_address_to_resource(phy_dn->parent, 0, &r);
 702         if (ret)
 703                 goto err;
 704
 705         phy_id = *prop;
 706         snprintf(mac->phy_id, BUS_ID_SIZE, PHY_ID_FMT, (int)r.start, phy_id);
 707
 708         of_node_put(phy_dn);
 709
 710         mac->link = 0;
 711         mac->speed = 0;
 712         mac->duplex = -1;
 713
 714         phydev = phy_connect(dev, mac->phy_id, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
 715
 716         if (IS_ERR(phydev)) {
 717                 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
 718                 return PTR_ERR(phydev);
 719         }
 720
 721         mac->phydev = phydev;
 722
 723         return 0;
 724
 725 err:
 726         of_node_put(phy_dn);
 727         return -ENODEV;
 728 }
 729
 730
 731 static int pasemi_mac_open(struct net_device *dev)
 732 {
 733         struct pasemi_mac *mac = netdev_priv(dev);
 734         int base_irq;
 735         unsigned int flags;
 736         int ret;
 737
 738         /* enable rx section */
 739         pci_write_config_dword(mac->dma_pdev, PAS_DMA_COM_RXCMD,
 740                                PAS_DMA_COM_RXCMD_EN);
 741
 742         /* enable tx section */
 743         pci_write_config_dword(mac->dma_pdev, PAS_DMA_COM_TXCMD,
 744                                PAS_DMA_COM_TXCMD_EN);
 745
 746         flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
 747                 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
 748                 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
 749
 750         pci_write_config_dword(mac->pdev, PAS_MAC_CFG_TXP, flags);
 751
 752         flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
 753                 PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
 754
 755         flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
 756
 757         pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
 758                                PAS_IOB_DMA_RXCH_CFG_CNTTH(0));
 759
 760         pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch),
 761                                PAS_IOB_DMA_TXCH_CFG_CNTTH(32));
 762
 763         /* Clear out any residual packet count state from firmware */
 764         pasemi_mac_restart_rx_intr(mac);
 765         pasemi_mac_restart_tx_intr(mac);
 766
 767         /* 0xffffff is max value, about 16ms */
 768         pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_COM_TIMEOUTCFG,
 769                                PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
 770
 771         pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, flags);
 772
 773         ret = pasemi_mac_setup_rx_resources(dev);
 774         if (ret)
 775                 goto out_rx_resources;
 776
 777         ret = pasemi_mac_setup_tx_resources(dev);
 778         if (ret)
 779                 goto out_tx_resources;
 780
 781         pci_write_config_dword(mac->pdev, PAS_MAC_IPC_CHNL,
 782                                PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) |
 783                                PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch));
 784
 785         /* enable rx if */
 786         pci_write_config_dword(mac->dma_pdev,
 787                                PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
 788                                PAS_DMA_RXINT_RCMDSTA_EN);
 789
 790         /* enable rx channel */
 791         pci_write_config_dword(mac->dma_pdev,
 792                                PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
 793                                PAS_DMA_RXCHAN_CCMDSTA_EN |
 794                                PAS_DMA_RXCHAN_CCMDSTA_DU);
 795
 796         /* enable tx channel */
 797         pci_write_config_dword(mac->dma_pdev,
 798                                PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
 799                                PAS_DMA_TXCHAN_TCMDSTA_EN);
 800
 801         pasemi_mac_replenish_rx_ring(dev);
 802
 803         ret = pasemi_mac_phy_init(dev);
 804         /* Some configs don't have PHYs (XAUI etc), so don't complain about
 805          * failed init due to -ENODEV.
 806          */
 807         if (ret && ret != -ENODEV)
 808                 dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
 809
 810         netif_start_queue(dev);
 811         netif_poll_enable(dev);
 812
 813         /* Interrupts are a bit different for our DMA controller: While
 814          * it's got one a regular PCI device header, the interrupt there
 815          * is really the base of the range it's using. Each tx and rx
 816          * channel has it's own interrupt source.
 817          */
 818
 819         base_irq = virq_to_hw(mac->dma_pdev->irq);
 820
 821         mac->tx_irq = irq_create_mapping(NULL, base_irq + mac->dma_txch);
 822         mac->rx_irq = irq_create_mapping(NULL, base_irq + 20 + mac->dma_txch);
 823
 824         ret = request_irq(mac->tx_irq, &pasemi_mac_tx_intr, IRQF_DISABLED,
 825                           mac->tx->irq_name, dev);
 826         if (ret) {
 827                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 828                         base_irq + mac->dma_txch, ret);
 829                 goto out_tx_int;
 830         }
 831
 832         ret = request_irq(mac->rx_irq, &pasemi_mac_rx_intr, IRQF_DISABLED,
 833                           mac->rx->irq_name, dev);
 834         if (ret) {
 835                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 836                         base_irq + 20 + mac->dma_rxch, ret);
 837                 goto out_rx_int;
 838         }
 839
 840         if (mac->phydev)
 841                 phy_start(mac->phydev);
 842
 843         return 0;
 844
 845 out_rx_int:
 846         free_irq(mac->tx_irq, dev);
 847 out_tx_int:
 848         netif_poll_disable(dev);
 849         netif_stop_queue(dev);
 850         pasemi_mac_free_tx_resources(dev);
 851 out_tx_resources:
 852         pasemi_mac_free_rx_resources(dev);
 853 out_rx_resources:
 854
 855         return ret;
 856 }
 857
 858 #define MAX_RETRIES 5000
 859
 860 static int pasemi_mac_close(struct net_device *dev)
 861 {
 862         struct pasemi_mac *mac = netdev_priv(dev);
 863         unsigned int stat;
 864         int retries;
 865
 866         if (mac->phydev) {
 867                 phy_stop(mac->phydev);
 868                 phy_disconnect(mac->phydev);
 869         }
 870
 871         netif_stop_queue(dev);
 872
 873         /* Clean out any pending buffers */
 874         pasemi_mac_clean_tx(mac);
 875         pasemi_mac_clean_rx(mac, RX_RING_SIZE);
 876
 877         /* Disable interface */
 878         pci_write_config_dword(mac->dma_pdev,
 879                                PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
 880                                PAS_DMA_TXCHAN_TCMDSTA_ST);
 881         pci_write_config_dword(mac->dma_pdev,
 882                       PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
 883                       PAS_DMA_RXINT_RCMDSTA_ST);
 884         pci_write_config_dword(mac->dma_pdev,
 885                       PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
 886                       PAS_DMA_RXCHAN_CCMDSTA_ST);
 887
 888         for (retries = 0; retries < MAX_RETRIES; retries++) {
 889                 pci_read_config_dword(mac->dma_pdev,
 890                                       PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
 891                                       &stat);
 892                 if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT))
 893                         break;
 894                 cond_resched();
 895         }
 896
 897         if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)
 898                 dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel\n");
 899
 900         for (retries = 0; retries < MAX_RETRIES; retries++) {
 901                 pci_read_config_dword(mac->dma_pdev,
 902                                       PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
 903                                       &stat);
 904                 if (!(stat & PAS_DMA_RXCHAN_CCMDSTA_ACT))
 905                         break;
 906                 cond_resched();
 907         }
 908
 909         if (stat & PAS_DMA_RXCHAN_CCMDSTA_ACT)
 910                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx channel\n");
 911
 912         for (retries = 0; retries < MAX_RETRIES; retries++) {
 913                 pci_read_config_dword(mac->dma_pdev,
 914                                       PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
 915                                       &stat);
 916                 if (!(stat & PAS_DMA_RXINT_RCMDSTA_ACT))
 917                         break;
 918                 cond_resched();
 919         }
 920
 921         if (stat & PAS_DMA_RXINT_RCMDSTA_ACT)
 922                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx interface\n");
 923
 924         /* Then, disable the channel. This must be done separately from
 925          * stopping, since you can't disable when active.
 926          */
 927
 928         pci_write_config_dword(mac->dma_pdev,
 929                                PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0);
 930         pci_write_config_dword(mac->dma_pdev,
 931                                PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0);
 932         pci_write_config_dword(mac->dma_pdev,
 933                                PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
 934
 935         free_irq(mac->tx_irq, dev);
 936         free_irq(mac->rx_irq, dev);
 937
 938         /* Free resources */
 939         pasemi_mac_free_rx_resources(dev);
 940         pasemi_mac_free_tx_resources(dev);
 941
 942         return 0;
 943 }
 944
 945 static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
 946 {
 947         struct pasemi_mac *mac = netdev_priv(dev);
 948         struct pasemi_mac_txring *txring;
 949         struct pasemi_mac_buffer *info;
 950         struct pas_dma_xct_descr *dp;
 951         u64 dflags;
 952         dma_addr_t map;
 953         int flags;
 954
 955         dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_SS | XCT_MACTX_CRC_PAD;
 956
 957         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 958                 const unsigned char *nh = skb_network_header(skb);
 959
 960                 switch (ip_hdr(skb)->protocol) {
 961                 case IPPROTO_TCP:
 962                         dflags |= XCT_MACTX_CSUM_TCP;
 963                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
 964                         dflags |= XCT_MACTX_IPO(nh - skb->data);
 965                         break;
 966                 case IPPROTO_UDP:
 967                         dflags |= XCT_MACTX_CSUM_UDP;
 968                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
 969                         dflags |= XCT_MACTX_IPO(nh - skb->data);
 970                         break;
 971                 }
 972         }
 973
 974         map = pci_map_single(mac->dma_pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
 975
 976         if (dma_mapping_error(map))
 977                 return NETDEV_TX_BUSY;
 978
 979         txring = mac->tx;
 980
 981         spin_lock_irqsave(&txring->lock, flags);
 982
 983         if (txring->next_to_clean - txring->next_to_use == TX_RING_SIZE) {
 984                 spin_unlock_irqrestore(&txring->lock, flags);
 985                 pasemi_mac_clean_tx(mac);
 986                 pasemi_mac_restart_tx_intr(mac);
 987                 spin_lock_irqsave(&txring->lock, flags);
 988
 989                 if (txring->next_to_clean - txring->next_to_use ==
 990                     TX_RING_SIZE) {
 991                         /* Still no room -- stop the queue and wait for tx
 992                          * intr when there's room.
 993                          */
 994                         netif_stop_queue(dev);
 995                         goto out_err;
 996                 }
 997         }
 998
 999
1000         dp = &TX_DESC(mac, txring->next_to_use);
1001         info = &TX_DESC_INFO(mac, txring->next_to_use);
1002
1003         dp->mactx = dflags | XCT_MACTX_LLEN(skb->len);
1004         dp->ptr   = XCT_PTR_LEN(skb->len) | XCT_PTR_ADDR(map);
1005         info->dma = map;
1006         info->skb = skb;
1007
1008         txring->next_to_use++;
1009         mac->stats.tx_packets++;
1010         mac->stats.tx_bytes += skb->len;
1011
1012         spin_unlock_irqrestore(&txring->lock, flags);
1013
1014         pci_write_config_dword(mac->dma_pdev,
1015                                PAS_DMA_TXCHAN_INCR(mac->dma_txch), 1);
1016
1017         return NETDEV_TX_OK;
1018
1019 out_err:
1020         spin_unlock_irqrestore(&txring->lock, flags);
1021         pci_unmap_single(mac->dma_pdev, map, skb->len, PCI_DMA_TODEVICE);
1022         return NETDEV_TX_BUSY;
1023 }
1024
1025 static struct net_device_stats *pasemi_mac_get_stats(struct net_device *dev)
1026 {
1027         struct pasemi_mac *mac = netdev_priv(dev);
1028
1029         return &mac->stats;
1030 }
1031
1032
1033 static void pasemi_mac_set_rx_mode(struct net_device *dev)
1034 {
1035         struct pasemi_mac *mac = netdev_priv(dev);
1036         unsigned int flags;
1037
1038         pci_read_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, &flags);
1039
1040         /* Set promiscuous */
1041         if (dev->flags & IFF_PROMISC)
1042                 flags |= PAS_MAC_CFG_PCFG_PR;
1043         else
1044                 flags &= ~PAS_MAC_CFG_PCFG_PR;
1045
1046         pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, flags);
1047 }
1048
1049
1050 static int pasemi_mac_poll(struct net_device *dev, int *budget)
1051 {
1052         int pkts, limit = min(*budget, dev->quota);
1053         struct pasemi_mac *mac = netdev_priv(dev);
1054
1055         pkts = pasemi_mac_clean_rx(mac, limit);
1056
1057         dev->quota -= pkts;
1058         *budget -= pkts;
1059
1060         if (pkts < limit) {
1061                 /* all done, no more packets present */
1062                 netif_rx_complete(dev);
1063
1064                 pasemi_mac_restart_rx_intr(mac);
1065                 return 0;
1066         } else {
1067                 /* used up our quantum, so reschedule */
1068                 return 1;
1069         }
1070 }
1071
1072 static int __devinit
1073 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1074 {
1075         static int index = 0;
1076         struct net_device *dev;
1077         struct pasemi_mac *mac;
1078         int err;
1079
1080         err = pci_enable_device(pdev);
1081         if (err)
1082                 return err;
1083
1084         dev = alloc_etherdev(sizeof(struct pasemi_mac));
1085         if (dev == NULL) {
1086                 dev_err(&pdev->dev,
1087                         "pasemi_mac: Could not allocate ethernet device.\n");
1088                 err = -ENOMEM;
1089                 goto out_disable_device;
1090         }
1091
1092         SET_MODULE_OWNER(dev);
1093         pci_set_drvdata(pdev, dev);
1094         SET_NETDEV_DEV(dev, &pdev->dev);
1095
1096         mac = netdev_priv(dev);
1097
1098         mac->pdev = pdev;
1099         mac->netdev = dev;
1100         mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1101
1102         if (!mac->dma_pdev) {
1103                 dev_err(&pdev->dev, "Can't find DMA Controller\n");
1104                 err = -ENODEV;
1105                 goto out_free_netdev;
1106         }
1107
1108         mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1109
1110         if (!mac->iob_pdev) {
1111                 dev_err(&pdev->dev, "Can't find I/O Bridge\n");
1112                 err = -ENODEV;
1113                 goto out_put_dma_pdev;
1114         }
1115
1116         /* These should come out of the device tree eventually */
1117         mac->dma_txch = index;
1118         mac->dma_rxch = index;
1119
1120         /* We probe GMAC before XAUI, but the DMA interfaces are
1121          * in XAUI, GMAC order.
1122          */
1123         if (index < 4)
1124                 mac->dma_if = index + 2;
1125         else
1126                 mac->dma_if = index - 4;
1127         index++;
1128
1129         switch (pdev->device) {
1130         case 0xa005:
1131                 mac->type = MAC_TYPE_GMAC;
1132                 break;
1133         case 0xa006:
1134                 mac->type = MAC_TYPE_XAUI;
1135                 break;
1136         default:
1137                 err = -ENODEV;
1138                 goto out;
1139         }
1140
1141         /* get mac addr from device tree */
1142         if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1143                 err = -ENODEV;
1144                 goto out;
1145         }
1146         memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr));
1147
1148         dev->open = pasemi_mac_open;
1149         dev->stop = pasemi_mac_close;
1150         dev->hard_start_xmit = pasemi_mac_start_tx;
1151         dev->get_stats = pasemi_mac_get_stats;
1152         dev->set_multicast_list = pasemi_mac_set_rx_mode;
1153         dev->weight = 64;
1154         dev->poll = pasemi_mac_poll;
1155         dev->features = NETIF_F_HW_CSUM;
1156
1157         /* The dma status structure is located in the I/O bridge, and
1158          * is cache coherent.
1159          */
1160         if (!dma_status)
1161                 /* XXXOJN This should come from the device tree */
1162                 dma_status = __ioremap(0xfd800000, 0x1000, 0);
1163
1164         mac->rx_status = &dma_status->rx_sta[mac->dma_rxch];
1165         mac->tx_status = &dma_status->tx_sta[mac->dma_txch];
1166
1167         mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1168
1169         /* Enable most messages by default */
1170         mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1171
1172         err = register_netdev(dev);
1173
1174         if (err) {
1175                 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1176                         err);
1177                 goto out;
1178         } else
1179                 printk(KERN_INFO "%s: PA Semi %s: intf %d, txch %d, rxch %d, "
1180                        "hw addr %02x:%02x:%02x:%02x:%02x:%02x\n",
1181                        dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
1182                        mac->dma_if, mac->dma_txch, mac->dma_rxch,
1183                        dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
1184                        dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
1185
1186         return err;
1187
1188 out:
1189         pci_dev_put(mac->iob_pdev);
1190 out_put_dma_pdev:
1191         pci_dev_put(mac->dma_pdev);
1192 out_free_netdev:
1193         free_netdev(dev);
1194 out_disable_device:
1195         pci_disable_device(pdev);
1196         return err;
1197
1198 }
1199
1200 static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
1201 {
1202         struct net_device *netdev = pci_get_drvdata(pdev);
1203         struct pasemi_mac *mac;
1204
1205         if (!netdev)
1206                 return;
1207
1208         mac = netdev_priv(netdev);
1209
1210         unregister_netdev(netdev);
1211
1212         pci_disable_device(pdev);
1213         pci_dev_put(mac->dma_pdev);
1214         pci_dev_put(mac->iob_pdev);
1215
1216         pci_set_drvdata(pdev, NULL);
1217         free_netdev(netdev);
1218 }
1219
1220 static struct pci_device_id pasemi_mac_pci_tbl[] = {
1221         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1222         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
1223         { },
1224 };
1225
1226 MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl);
1227
1228 static struct pci_driver pasemi_mac_driver = {
1229         .name           = "pasemi_mac",
1230         .id_table       = pasemi_mac_pci_tbl,
1231         .probe          = pasemi_mac_probe,
1232         .remove         = __devexit_p(pasemi_mac_remove),
1233 };
1234
1235 static void __exit pasemi_mac_cleanup_module(void)
1236 {
1237         pci_unregister_driver(&pasemi_mac_driver);
1238         __iounmap(dma_status);
1239         dma_status = NULL;
1240 }
1241
1242 int pasemi_mac_init_module(void)
1243 {
1244         return pci_register_driver(&pasemi_mac_driver);
1245 }
1246
1247 module_init(pasemi_mac_init_module);
1248 module_exit(pasemi_mac_cleanup_module);