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