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, stat;
 388         /* Re-enable packet count interrupts: finally
 389          * ack the packet count interrupt we got in rx_intr.
 390          */
 391
 392         pci_read_config_dword(mac->iob_pdev,
 393                               PAS_IOB_DMA_RXCH_STAT(mac->dma_rxch),
 394                               &stat);
 395
 396         reg = PAS_IOB_DMA_RXCH_RESET_PCNT(stat & PAS_IOB_DMA_RXCH_STAT_CNTDEL_M)
 397                 | PAS_IOB_DMA_RXCH_RESET_PINTC;
 398
 399         pci_write_config_dword(mac->iob_pdev,
 400                                PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch),
 401                                reg);
 402 }
 403
 404 static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
 405 {
 406         unsigned int reg, stat;
 407
 408         /* Re-enable packet count interrupts */
 409         pci_read_config_dword(mac->iob_pdev,
 410                               PAS_IOB_DMA_TXCH_STAT(mac->dma_txch), &stat);
 411
 412         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(stat & PAS_IOB_DMA_TXCH_STAT_CNTDEL_M)
 413                 | PAS_IOB_DMA_TXCH_RESET_PINTC;
 414
 415         pci_write_config_dword(mac->iob_pdev,
 416                                PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
 417 }
 418
 419
 420 static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
 421 {
 422         unsigned int n;
 423         int count;
 424         struct pas_dma_xct_descr *dp;
 425         struct pasemi_mac_buffer *info;
 426         struct sk_buff *skb;
 427         unsigned int i, len;
 428         u64 macrx;
 429         dma_addr_t dma;
 430
 431         spin_lock(&mac->rx->lock);
 432
 433         n = mac->rx->next_to_clean;
 434
 435         for (count = limit; count; count--) {
 436
 437                 rmb();
 438
 439                 dp = &RX_DESC(mac, n);
 440                 macrx = dp->macrx;
 441
 442                 if (!(macrx & XCT_MACRX_O))
 443                         break;
 444
 445
 446                 info = NULL;
 447
 448                 /* We have to scan for our skb since there's no way
 449                  * to back-map them from the descriptor, and if we
 450                  * have several receive channels then they might not
 451                  * show up in the same order as they were put on the
 452                  * interface ring.
 453                  */
 454
 455                 dma = (dp->ptr & XCT_PTR_ADDR_M);
 456                 for (i = n; i < (n + RX_RING_SIZE); i++) {
 457                         info = &RX_DESC_INFO(mac, i);
 458                         if (info->dma == dma)
 459                                 break;
 460                 }
 461
 462                 skb = info->skb;
 463                 info->dma = 0;
 464
 465                 pci_unmap_single(mac->dma_pdev, dma, skb->len,
 466                                  PCI_DMA_FROMDEVICE);
 467
 468                 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
 469
 470                 if (len < 256) {
 471                         struct sk_buff *new_skb =
 472                             netdev_alloc_skb(mac->netdev, len + NET_IP_ALIGN);
 473                         if (new_skb) {
 474                                 skb_reserve(new_skb, NET_IP_ALIGN);
 475                                 memcpy(new_skb->data - NET_IP_ALIGN,
 476                                         skb->data - NET_IP_ALIGN,
 477                                         len + NET_IP_ALIGN);
 478                                 /* save the skb in buffer_info as good */
 479                                 skb = new_skb;
 480                         }
 481                         /* else just continue with the old one */
 482                 } else
 483                         info->skb = NULL;
 484
 485                 skb_put(skb, len);
 486
 487                 skb->protocol = eth_type_trans(skb, mac->netdev);
 488
 489                 if ((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK) {
 490                         skb->ip_summed = CHECKSUM_COMPLETE;
 491                         skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
 492                                            XCT_MACRX_CSUM_S;
 493                 } else
 494                         skb->ip_summed = CHECKSUM_NONE;
 495
 496                 mac->stats.rx_bytes += len;
 497                 mac->stats.rx_packets++;
 498
 499                 netif_receive_skb(skb);
 500
 501                 dp->ptr = 0;
 502                 dp->macrx = 0;
 503
 504                 n++;
 505         }
 506
 507         mac->rx->next_to_clean += limit - count;
 508         pasemi_mac_replenish_rx_ring(mac->netdev);
 509
 510         spin_unlock(&mac->rx->lock);
 511
 512         return count;
 513 }
 514
 515 static int pasemi_mac_clean_tx(struct pasemi_mac *mac)
 516 {
 517         int i;
 518         struct pasemi_mac_buffer *info;
 519         struct pas_dma_xct_descr *dp;
 520         int start, count;
 521         int flags;
 522
 523         spin_lock_irqsave(&mac->tx->lock, flags);
 524
 525         start = mac->tx->next_to_clean;
 526         count = 0;
 527
 528         for (i = start; i < mac->tx->next_to_use; i++) {
 529                 dp = &TX_DESC(mac, i);
 530                 if (!dp || (dp->mactx & XCT_MACTX_O))
 531                         break;
 532
 533                 count++;
 534
 535                 info = &TX_DESC_INFO(mac, i);
 536
 537                 pci_unmap_single(mac->dma_pdev, info->dma,
 538                                  info->skb->len, PCI_DMA_TODEVICE);
 539                 dev_kfree_skb_irq(info->skb);
 540
 541                 info->skb = NULL;
 542                 info->dma = 0;
 543                 dp->mactx = 0;
 544                 dp->ptr = 0;
 545         }
 546         mac->tx->next_to_clean += count;
 547         spin_unlock_irqrestore(&mac->tx->lock, flags);
 548
 549         netif_wake_queue(mac->netdev);
 550
 551         return count;
 552 }
 553
 554
 555 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
 556 {
 557         struct net_device *dev = data;
 558         struct pasemi_mac *mac = netdev_priv(dev);
 559         unsigned int reg;
 560
 561         if (!(*mac->rx_status & PAS_STATUS_CAUSE_M))
 562                 return IRQ_NONE;
 563
 564         if (*mac->rx_status & PAS_STATUS_ERROR)
 565                 printk("rx_status reported error\n");
 566
 567         /* Don't reset packet count so it won't fire again but clear
 568          * all others.
 569          */
 570
 571         pci_read_config_dword(mac->dma_pdev, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), &reg);
 572
 573         reg = 0;
 574         if (*mac->rx_status & PAS_STATUS_SOFT)
 575                 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
 576         if (*mac->rx_status & PAS_STATUS_ERROR)
 577                 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
 578         if (*mac->rx_status & PAS_STATUS_TIMER)
 579                 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
 580
 581         netif_rx_schedule(dev);
 582
 583         pci_write_config_dword(mac->iob_pdev,
 584                                PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
 585
 586
 587         return IRQ_HANDLED;
 588 }
 589
 590 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
 591 {
 592         struct net_device *dev = data;
 593         struct pasemi_mac *mac = netdev_priv(dev);
 594         unsigned int reg;
 595
 596         if (!(*mac->tx_status & PAS_STATUS_CAUSE_M))
 597                 return IRQ_NONE;
 598
 599         pasemi_mac_clean_tx(mac);
 600
 601         reg = PAS_IOB_DMA_TXCH_RESET_PINTC;
 602
 603         if (*mac->tx_status & PAS_STATUS_SOFT)
 604                 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
 605         if (*mac->tx_status & PAS_STATUS_ERROR)
 606                 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
 607
 608         pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch),
 609                                reg);
 610
 611         return IRQ_HANDLED;
 612 }
 613
 614 static void pasemi_adjust_link(struct net_device *dev)
 615 {
 616         struct pasemi_mac *mac = netdev_priv(dev);
 617         int msg;
 618         unsigned int flags;
 619         unsigned int new_flags;
 620
 621         if (!mac->phydev->link) {
 622                 /* If no link, MAC speed settings don't matter. Just report
 623                  * link down and return.
 624                  */
 625                 if (mac->link && netif_msg_link(mac))
 626                         printk(KERN_INFO "%s: Link is down.\n", dev->name);
 627
 628                 netif_carrier_off(dev);
 629                 mac->link = 0;
 630
 631                 return;
 632         } else
 633                 netif_carrier_on(dev);
 634
 635         pci_read_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, &flags);
 636         new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
 637                               PAS_MAC_CFG_PCFG_TSR_M);
 638
 639         if (!mac->phydev->duplex)
 640                 new_flags |= PAS_MAC_CFG_PCFG_HD;
 641
 642         switch (mac->phydev->speed) {
 643         case 1000:
 644                 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
 645                              PAS_MAC_CFG_PCFG_TSR_1G;
 646                 break;
 647         case 100:
 648                 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
 649                              PAS_MAC_CFG_PCFG_TSR_100M;
 650                 break;
 651         case 10:
 652                 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
 653                              PAS_MAC_CFG_PCFG_TSR_10M;
 654                 break;
 655         default:
 656                 printk("Unsupported speed %d\n", mac->phydev->speed);
 657         }
 658
 659         /* Print on link or speed/duplex change */
 660         msg = mac->link != mac->phydev->link || flags != new_flags;
 661
 662         mac->duplex = mac->phydev->duplex;
 663         mac->speed = mac->phydev->speed;
 664         mac->link = mac->phydev->link;
 665
 666         if (new_flags != flags)
 667                 pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, new_flags);
 668
 669         if (msg && netif_msg_link(mac))
 670                 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
 671                        dev->name, mac->speed, mac->duplex ? "full" : "half");
 672 }
 673
 674 static int pasemi_mac_phy_init(struct net_device *dev)
 675 {
 676         struct pasemi_mac *mac = netdev_priv(dev);
 677         struct device_node *dn, *phy_dn;
 678         struct phy_device *phydev;
 679         unsigned int phy_id;
 680         const phandle *ph;
 681         const unsigned int *prop;
 682         struct resource r;
 683         int ret;
 684
 685         dn = pci_device_to_OF_node(mac->pdev);
 686         ph = of_get_property(dn, "phy-handle", NULL);
 687         if (!ph)
 688                 return -ENODEV;
 689         phy_dn = of_find_node_by_phandle(*ph);
 690
 691         prop = of_get_property(phy_dn, "reg", NULL);
 692         ret = of_address_to_resource(phy_dn->parent, 0, &r);
 693         if (ret)
 694                 goto err;
 695
 696         phy_id = *prop;
 697         snprintf(mac->phy_id, BUS_ID_SIZE, PHY_ID_FMT, (int)r.start, phy_id);
 698
 699         of_node_put(phy_dn);
 700
 701         mac->link = 0;
 702         mac->speed = 0;
 703         mac->duplex = -1;
 704
 705         phydev = phy_connect(dev, mac->phy_id, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
 706
 707         if (IS_ERR(phydev)) {
 708                 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
 709                 return PTR_ERR(phydev);
 710         }
 711
 712         mac->phydev = phydev;
 713
 714         return 0;
 715
 716 err:
 717         of_node_put(phy_dn);
 718         return -ENODEV;
 719 }
 720
 721
 722 static int pasemi_mac_open(struct net_device *dev)
 723 {
 724         struct pasemi_mac *mac = netdev_priv(dev);
 725         int base_irq;
 726         unsigned int flags;
 727         int ret;
 728
 729         /* enable rx section */
 730         pci_write_config_dword(mac->dma_pdev, PAS_DMA_COM_RXCMD,
 731                                PAS_DMA_COM_RXCMD_EN);
 732
 733         /* enable tx section */
 734         pci_write_config_dword(mac->dma_pdev, PAS_DMA_COM_TXCMD,
 735                                PAS_DMA_COM_TXCMD_EN);
 736
 737         flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
 738                 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
 739                 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
 740
 741         pci_write_config_dword(mac->pdev, PAS_MAC_CFG_TXP, flags);
 742
 743         flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
 744                 PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
 745
 746         flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
 747
 748         pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
 749                                PAS_IOB_DMA_RXCH_CFG_CNTTH(1));
 750
 751         pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch),
 752                                PAS_IOB_DMA_TXCH_CFG_CNTTH(32));
 753
 754         /* Clear out any residual packet count state from firmware */
 755         pasemi_mac_restart_rx_intr(mac);
 756         pasemi_mac_restart_tx_intr(mac);
 757
 758         /* 0xffffff is max value, about 16ms */
 759         pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_COM_TIMEOUTCFG,
 760                                PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
 761
 762         pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, flags);
 763
 764         ret = pasemi_mac_setup_rx_resources(dev);
 765         if (ret)
 766                 goto out_rx_resources;
 767
 768         ret = pasemi_mac_setup_tx_resources(dev);
 769         if (ret)
 770                 goto out_tx_resources;
 771
 772         pci_write_config_dword(mac->pdev, PAS_MAC_IPC_CHNL,
 773                                PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) |
 774                                PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch));
 775
 776         /* enable rx if */
 777         pci_write_config_dword(mac->dma_pdev,
 778                                PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
 779                                PAS_DMA_RXINT_RCMDSTA_EN);
 780
 781         /* enable rx channel */
 782         pci_write_config_dword(mac->dma_pdev,
 783                                PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
 784                                PAS_DMA_RXCHAN_CCMDSTA_EN |
 785                                PAS_DMA_RXCHAN_CCMDSTA_DU);
 786
 787         /* enable tx channel */
 788         pci_write_config_dword(mac->dma_pdev,
 789                                PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
 790                                PAS_DMA_TXCHAN_TCMDSTA_EN);
 791
 792         pasemi_mac_replenish_rx_ring(dev);
 793
 794         ret = pasemi_mac_phy_init(dev);
 795         /* Some configs don't have PHYs (XAUI etc), so don't complain about
 796          * failed init due to -ENODEV.
 797          */
 798         if (ret && ret != -ENODEV)
 799                 dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
 800
 801         netif_start_queue(dev);
 802         netif_poll_enable(dev);
 803
 804         /* Interrupts are a bit different for our DMA controller: While
 805          * it's got one a regular PCI device header, the interrupt there
 806          * is really the base of the range it's using. Each tx and rx
 807          * channel has it's own interrupt source.
 808          */
 809
 810         base_irq = virq_to_hw(mac->dma_pdev->irq);
 811
 812         mac->tx_irq = irq_create_mapping(NULL, base_irq + mac->dma_txch);
 813         mac->rx_irq = irq_create_mapping(NULL, base_irq + 20 + mac->dma_txch);
 814
 815         ret = request_irq(mac->tx_irq, &pasemi_mac_tx_intr, IRQF_DISABLED,
 816                           mac->tx->irq_name, dev);
 817         if (ret) {
 818                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 819                         base_irq + mac->dma_txch, ret);
 820                 goto out_tx_int;
 821         }
 822
 823         ret = request_irq(mac->rx_irq, &pasemi_mac_rx_intr, IRQF_DISABLED,
 824                           mac->rx->irq_name, dev);
 825         if (ret) {
 826                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 827                         base_irq + 20 + mac->dma_rxch, ret);
 828                 goto out_rx_int;
 829         }
 830
 831         if (mac->phydev)
 832                 phy_start(mac->phydev);
 833
 834         return 0;
 835
 836 out_rx_int:
 837         free_irq(mac->tx_irq, dev);
 838 out_tx_int:
 839         netif_poll_disable(dev);
 840         netif_stop_queue(dev);
 841         pasemi_mac_free_tx_resources(dev);
 842 out_tx_resources:
 843         pasemi_mac_free_rx_resources(dev);
 844 out_rx_resources:
 845
 846         return ret;
 847 }
 848
 849 #define MAX_RETRIES 5000
 850
 851 static int pasemi_mac_close(struct net_device *dev)
 852 {
 853         struct pasemi_mac *mac = netdev_priv(dev);
 854         unsigned int stat;
 855         int retries;
 856
 857         if (mac->phydev) {
 858                 phy_stop(mac->phydev);
 859                 phy_disconnect(mac->phydev);
 860         }
 861
 862         netif_stop_queue(dev);
 863
 864         /* Clean out any pending buffers */
 865         pasemi_mac_clean_tx(mac);
 866         pasemi_mac_clean_rx(mac, RX_RING_SIZE);
 867
 868         /* Disable interface */
 869         pci_write_config_dword(mac->dma_pdev,
 870                                PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
 871                                PAS_DMA_TXCHAN_TCMDSTA_ST);
 872         pci_write_config_dword(mac->dma_pdev,
 873                       PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
 874                       PAS_DMA_RXINT_RCMDSTA_ST);
 875         pci_write_config_dword(mac->dma_pdev,
 876                       PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
 877                       PAS_DMA_RXCHAN_CCMDSTA_ST);
 878
 879         for (retries = 0; retries < MAX_RETRIES; retries++) {
 880                 pci_read_config_dword(mac->dma_pdev,
 881                                       PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
 882                                       &stat);
 883                 if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT))
 884                         break;
 885                 cond_resched();
 886         }
 887
 888         if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)
 889                 dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel\n");
 890
 891         for (retries = 0; retries < MAX_RETRIES; retries++) {
 892                 pci_read_config_dword(mac->dma_pdev,
 893                                       PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
 894                                       &stat);
 895                 if (!(stat & PAS_DMA_RXCHAN_CCMDSTA_ACT))
 896                         break;
 897                 cond_resched();
 898         }
 899
 900         if (stat & PAS_DMA_RXCHAN_CCMDSTA_ACT)
 901                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx channel\n");
 902
 903         for (retries = 0; retries < MAX_RETRIES; retries++) {
 904                 pci_read_config_dword(mac->dma_pdev,
 905                                       PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
 906                                       &stat);
 907                 if (!(stat & PAS_DMA_RXINT_RCMDSTA_ACT))
 908                         break;
 909                 cond_resched();
 910         }
 911
 912         if (stat & PAS_DMA_RXINT_RCMDSTA_ACT)
 913                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx interface\n");
 914
 915         /* Then, disable the channel. This must be done separately from
 916          * stopping, since you can't disable when active.
 917          */
 918
 919         pci_write_config_dword(mac->dma_pdev,
 920                                PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0);
 921         pci_write_config_dword(mac->dma_pdev,
 922                                PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0);
 923         pci_write_config_dword(mac->dma_pdev,
 924                                PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
 925
 926         free_irq(mac->tx_irq, dev);
 927         free_irq(mac->rx_irq, dev);
 928
 929         /* Free resources */
 930         pasemi_mac_free_rx_resources(dev);
 931         pasemi_mac_free_tx_resources(dev);
 932
 933         return 0;
 934 }
 935
 936 static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
 937 {
 938         struct pasemi_mac *mac = netdev_priv(dev);
 939         struct pasemi_mac_txring *txring;
 940         struct pasemi_mac_buffer *info;
 941         struct pas_dma_xct_descr *dp;
 942         u64 dflags;
 943         dma_addr_t map;
 944         int flags;
 945
 946         dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_SS | XCT_MACTX_CRC_PAD;
 947
 948         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 949                 const unsigned char *nh = skb_network_header(skb);
 950
 951                 switch (ip_hdr(skb)->protocol) {
 952                 case IPPROTO_TCP:
 953                         dflags |= XCT_MACTX_CSUM_TCP;
 954                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
 955                         dflags |= XCT_MACTX_IPO(nh - skb->data);
 956                         break;
 957                 case IPPROTO_UDP:
 958                         dflags |= XCT_MACTX_CSUM_UDP;
 959                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
 960                         dflags |= XCT_MACTX_IPO(nh - skb->data);
 961                         break;
 962                 }
 963         }
 964
 965         map = pci_map_single(mac->dma_pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
 966
 967         if (dma_mapping_error(map))
 968                 return NETDEV_TX_BUSY;
 969
 970         txring = mac->tx;
 971
 972         spin_lock_irqsave(&txring->lock, flags);
 973
 974         if (txring->next_to_clean - txring->next_to_use == TX_RING_SIZE) {
 975                 spin_unlock_irqrestore(&txring->lock, flags);
 976                 pasemi_mac_clean_tx(mac);
 977                 spin_lock_irqsave(&txring->lock, flags);
 978
 979                 if (txring->next_to_clean - txring->next_to_use ==
 980                     TX_RING_SIZE) {
 981                         /* Still no room -- stop the queue and wait for tx
 982                          * intr when there's room.
 983                          */
 984                         netif_stop_queue(dev);
 985                         goto out_err;
 986                 }
 987         }
 988
 989
 990         dp = &TX_DESC(mac, txring->next_to_use);
 991         info = &TX_DESC_INFO(mac, txring->next_to_use);
 992
 993         dp->mactx = dflags | XCT_MACTX_LLEN(skb->len);
 994         dp->ptr   = XCT_PTR_LEN(skb->len) | XCT_PTR_ADDR(map);
 995         info->dma = map;
 996         info->skb = skb;
 997
 998         txring->next_to_use++;
 999         mac->stats.tx_packets++;
1000         mac->stats.tx_bytes += skb->len;
1001
1002         spin_unlock_irqrestore(&txring->lock, flags);
1003
1004         pci_write_config_dword(mac->dma_pdev,
1005                                PAS_DMA_TXCHAN_INCR(mac->dma_txch), 1);
1006
1007         return NETDEV_TX_OK;
1008
1009 out_err:
1010         spin_unlock_irqrestore(&txring->lock, flags);
1011         pci_unmap_single(mac->dma_pdev, map, skb->len, PCI_DMA_TODEVICE);
1012         return NETDEV_TX_BUSY;
1013 }
1014
1015 static struct net_device_stats *pasemi_mac_get_stats(struct net_device *dev)
1016 {
1017         struct pasemi_mac *mac = netdev_priv(dev);
1018
1019         return &mac->stats;
1020 }
1021
1022
1023 static void pasemi_mac_set_rx_mode(struct net_device *dev)
1024 {
1025         struct pasemi_mac *mac = netdev_priv(dev);
1026         unsigned int flags;
1027
1028         pci_read_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, &flags);
1029
1030         /* Set promiscuous */
1031         if (dev->flags & IFF_PROMISC)
1032                 flags |= PAS_MAC_CFG_PCFG_PR;
1033         else
1034                 flags &= ~PAS_MAC_CFG_PCFG_PR;
1035
1036         pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, flags);
1037 }
1038
1039
1040 static int pasemi_mac_poll(struct net_device *dev, int *budget)
1041 {
1042         int pkts, limit = min(*budget, dev->quota);
1043         struct pasemi_mac *mac = netdev_priv(dev);
1044
1045         pkts = pasemi_mac_clean_rx(mac, limit);
1046
1047         dev->quota -= pkts;
1048         *budget -= pkts;
1049
1050         if (pkts < limit) {
1051                 /* all done, no more packets present */
1052                 netif_rx_complete(dev);
1053
1054                 pasemi_mac_restart_rx_intr(mac);
1055                 return 0;
1056         } else {
1057                 /* used up our quantum, so reschedule */
1058                 return 1;
1059         }
1060 }
1061
1062 static int __devinit
1063 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1064 {
1065         static int index = 0;
1066         struct net_device *dev;
1067         struct pasemi_mac *mac;
1068         int err;
1069
1070         err = pci_enable_device(pdev);
1071         if (err)
1072                 return err;
1073
1074         dev = alloc_etherdev(sizeof(struct pasemi_mac));
1075         if (dev == NULL) {
1076                 dev_err(&pdev->dev,
1077                         "pasemi_mac: Could not allocate ethernet device.\n");
1078                 err = -ENOMEM;
1079                 goto out_disable_device;
1080         }
1081
1082         SET_MODULE_OWNER(dev);
1083         pci_set_drvdata(pdev, dev);
1084         SET_NETDEV_DEV(dev, &pdev->dev);
1085
1086         mac = netdev_priv(dev);
1087
1088         mac->pdev = pdev;
1089         mac->netdev = dev;
1090         mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1091
1092         if (!mac->dma_pdev) {
1093                 dev_err(&pdev->dev, "Can't find DMA Controller\n");
1094                 err = -ENODEV;
1095                 goto out_free_netdev;
1096         }
1097
1098         mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1099
1100         if (!mac->iob_pdev) {
1101                 dev_err(&pdev->dev, "Can't find I/O Bridge\n");
1102                 err = -ENODEV;
1103                 goto out_put_dma_pdev;
1104         }
1105
1106         /* These should come out of the device tree eventually */
1107         mac->dma_txch = index;
1108         mac->dma_rxch = index;
1109
1110         /* We probe GMAC before XAUI, but the DMA interfaces are
1111          * in XAUI, GMAC order.
1112          */
1113         if (index < 4)
1114                 mac->dma_if = index + 2;
1115         else
1116                 mac->dma_if = index - 4;
1117         index++;
1118
1119         switch (pdev->device) {
1120         case 0xa005:
1121                 mac->type = MAC_TYPE_GMAC;
1122                 break;
1123         case 0xa006:
1124                 mac->type = MAC_TYPE_XAUI;
1125                 break;
1126         default:
1127                 err = -ENODEV;
1128                 goto out;
1129         }
1130
1131         /* get mac addr from device tree */
1132         if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1133                 err = -ENODEV;
1134                 goto out;
1135         }
1136         memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr));
1137
1138         dev->open = pasemi_mac_open;
1139         dev->stop = pasemi_mac_close;
1140         dev->hard_start_xmit = pasemi_mac_start_tx;
1141         dev->get_stats = pasemi_mac_get_stats;
1142         dev->set_multicast_list = pasemi_mac_set_rx_mode;
1143         dev->weight = 64;
1144         dev->poll = pasemi_mac_poll;
1145         dev->features = NETIF_F_HW_CSUM;
1146
1147         /* The dma status structure is located in the I/O bridge, and
1148          * is cache coherent.
1149          */
1150         if (!dma_status)
1151                 /* XXXOJN This should come from the device tree */
1152                 dma_status = __ioremap(0xfd800000, 0x1000, 0);
1153
1154         mac->rx_status = &dma_status->rx_sta[mac->dma_rxch];
1155         mac->tx_status = &dma_status->tx_sta[mac->dma_txch];
1156
1157         mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1158
1159         /* Enable most messages by default */
1160         mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1161
1162         err = register_netdev(dev);
1163
1164         if (err) {
1165                 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1166                         err);
1167                 goto out;
1168         } else
1169                 printk(KERN_INFO "%s: PA Semi %s: intf %d, txch %d, rxch %d, "
1170                        "hw addr %02x:%02x:%02x:%02x:%02x:%02x\n",
1171                        dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
1172                        mac->dma_if, mac->dma_txch, mac->dma_rxch,
1173                        dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
1174                        dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
1175
1176         return err;
1177
1178 out:
1179         pci_dev_put(mac->iob_pdev);
1180 out_put_dma_pdev:
1181         pci_dev_put(mac->dma_pdev);
1182 out_free_netdev:
1183         free_netdev(dev);
1184 out_disable_device:
1185         pci_disable_device(pdev);
1186         return err;
1187
1188 }
1189
1190 static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
1191 {
1192         struct net_device *netdev = pci_get_drvdata(pdev);
1193         struct pasemi_mac *mac;
1194
1195         if (!netdev)
1196                 return;
1197
1198         mac = netdev_priv(netdev);
1199
1200         unregister_netdev(netdev);
1201
1202         pci_disable_device(pdev);
1203         pci_dev_put(mac->dma_pdev);
1204         pci_dev_put(mac->iob_pdev);
1205
1206         pci_set_drvdata(pdev, NULL);
1207         free_netdev(netdev);
1208 }
1209
1210 static struct pci_device_id pasemi_mac_pci_tbl[] = {
1211         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1212         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
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);