git.oblomov.eu Git - linux-2.6/blob - 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 RING_USED(ring)         (((ring)->next_to_fill - (ring)->next_to_clean) \
  73                                  & ((ring)->size - 1))
  74 #define RING_AVAIL(ring)        ((ring->size) - RING_USED(ring))
  75
  76 #define BUF_SIZE 1646 /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
  77
  78 MODULE_LICENSE("GPL");
  79 MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
  80 MODULE_DESCRIPTION("PA Semi PWRficient Ethernet driver");
  81
  82 static int debug = -1;  /* -1 == use DEFAULT_MSG_ENABLE as value */
  83 module_param(debug, int, 0);
  84 MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value");
  85
  86 static struct pasdma_status *dma_status;
  87
  88 static void write_iob_reg(struct pasemi_mac *mac, unsigned int reg,
  89                           unsigned int val)
  90 {
  91         out_le32(mac->iob_regs+reg, val);
  92 }
  93
  94 static unsigned int read_mac_reg(struct pasemi_mac *mac, unsigned int reg)
  95 {
  96         return in_le32(mac->regs+reg);
  97 }
  98
  99 static void write_mac_reg(struct pasemi_mac *mac, unsigned int reg,
 100                           unsigned int val)
 101 {
 102         out_le32(mac->regs+reg, val);
 103 }
 104
 105 static unsigned int read_dma_reg(struct pasemi_mac *mac, unsigned int reg)
 106 {
 107         return in_le32(mac->dma_regs+reg);
 108 }
 109
 110 static void write_dma_reg(struct pasemi_mac *mac, unsigned int reg,
 111                           unsigned int val)
 112 {
 113         out_le32(mac->dma_regs+reg, val);
 114 }
 115
 116 static int pasemi_get_mac_addr(struct pasemi_mac *mac)
 117 {
 118         struct pci_dev *pdev = mac->pdev;
 119         struct device_node *dn = pci_device_to_OF_node(pdev);
 120         int len;
 121         const u8 *maddr;
 122         u8 addr[6];
 123
 124         if (!dn) {
 125                 dev_dbg(&pdev->dev,
 126                           "No device node for mac, not configuring\n");
 127                 return -ENOENT;
 128         }
 129
 130         maddr = of_get_property(dn, "local-mac-address", &len);
 131
 132         if (maddr && len == 6) {
 133                 memcpy(mac->mac_addr, maddr, 6);
 134                 return 0;
 135         }
 136
 137         /* Some old versions of firmware mistakenly uses mac-address
 138          * (and as a string) instead of a byte array in local-mac-address.
 139          */
 140
 141         if (maddr == NULL)
 142                 maddr = of_get_property(dn, "mac-address", NULL);
 143
 144         if (maddr == NULL) {
 145                 dev_warn(&pdev->dev,
 146                          "no mac address in device tree, not configuring\n");
 147                 return -ENOENT;
 148         }
 149
 150
 151         if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0],
 152                    &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) {
 153                 dev_warn(&pdev->dev,
 154                          "can't parse mac address, not configuring\n");
 155                 return -EINVAL;
 156         }
 157
 158         memcpy(mac->mac_addr, addr, 6);
 159
 160         return 0;
 161 }
 162
 163 static int pasemi_mac_setup_rx_resources(struct net_device *dev)
 164 {
 165         struct pasemi_mac_rxring *ring;
 166         struct pasemi_mac *mac = netdev_priv(dev);
 167         int chan_id = mac->dma_rxch;
 168
 169         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
 170
 171         if (!ring)
 172                 goto out_ring;
 173
 174         spin_lock_init(&ring->lock);
 175
 176         ring->size = RX_RING_SIZE;
 177         ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
 178                                   RX_RING_SIZE, GFP_KERNEL);
 179
 180         if (!ring->desc_info)
 181                 goto out_desc_info;
 182
 183         /* Allocate descriptors */
 184         ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
 185                                         RX_RING_SIZE *
 186                                         sizeof(struct pas_dma_xct_descr),
 187                                         &ring->dma, GFP_KERNEL);
 188
 189         if (!ring->desc)
 190                 goto out_desc;
 191
 192         memset(ring->desc, 0, RX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
 193
 194         ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev,
 195                                            RX_RING_SIZE * sizeof(u64),
 196                                            &ring->buf_dma, GFP_KERNEL);
 197         if (!ring->buffers)
 198                 goto out_buffers;
 199
 200         memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64));
 201
 202         write_dma_reg(mac, PAS_DMA_RXCHAN_BASEL(chan_id), PAS_DMA_RXCHAN_BASEL_BRBL(ring->dma));
 203
 204         write_dma_reg(mac, PAS_DMA_RXCHAN_BASEU(chan_id),
 205                            PAS_DMA_RXCHAN_BASEU_BRBH(ring->dma >> 32) |
 206                            PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 2));
 207
 208         write_dma_reg(mac, PAS_DMA_RXCHAN_CFG(chan_id),
 209                            PAS_DMA_RXCHAN_CFG_HBU(2));
 210
 211         write_dma_reg(mac, PAS_DMA_RXINT_BASEL(mac->dma_if),
 212                            PAS_DMA_RXINT_BASEL_BRBL(__pa(ring->buffers)));
 213
 214         write_dma_reg(mac, PAS_DMA_RXINT_BASEU(mac->dma_if),
 215                            PAS_DMA_RXINT_BASEU_BRBH(__pa(ring->buffers) >> 32) |
 216                            PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
 217
 218         write_dma_reg(mac, PAS_DMA_RXINT_CFG(mac->dma_if),
 219                            PAS_DMA_RXINT_CFG_DHL(2));
 220
 221         ring->next_to_fill = 0;
 222         ring->next_to_clean = 0;
 223
 224         snprintf(ring->irq_name, sizeof(ring->irq_name),
 225                  "%s rx", dev->name);
 226         mac->rx = ring;
 227
 228         return 0;
 229
 230 out_buffers:
 231         dma_free_coherent(&mac->dma_pdev->dev,
 232                           RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 233                           mac->rx->desc, mac->rx->dma);
 234 out_desc:
 235         kfree(ring->desc_info);
 236 out_desc_info:
 237         kfree(ring);
 238 out_ring:
 239         return -ENOMEM;
 240 }
 241
 242
 243 static int pasemi_mac_setup_tx_resources(struct net_device *dev)
 244 {
 245         struct pasemi_mac *mac = netdev_priv(dev);
 246         u32 val;
 247         int chan_id = mac->dma_txch;
 248         struct pasemi_mac_txring *ring;
 249
 250         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
 251         if (!ring)
 252                 goto out_ring;
 253
 254         spin_lock_init(&ring->lock);
 255
 256         ring->size = TX_RING_SIZE;
 257         ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
 258                                   TX_RING_SIZE, GFP_KERNEL);
 259         if (!ring->desc_info)
 260                 goto out_desc_info;
 261
 262         /* Allocate descriptors */
 263         ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
 264                                         TX_RING_SIZE *
 265                                         sizeof(struct pas_dma_xct_descr),
 266                                         &ring->dma, GFP_KERNEL);
 267         if (!ring->desc)
 268                 goto out_desc;
 269
 270         memset(ring->desc, 0, TX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
 271
 272         write_dma_reg(mac, PAS_DMA_TXCHAN_BASEL(chan_id),
 273                            PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma));
 274         val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32);
 275         val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 2);
 276
 277         write_dma_reg(mac, PAS_DMA_TXCHAN_BASEU(chan_id), val);
 278
 279         write_dma_reg(mac, PAS_DMA_TXCHAN_CFG(chan_id),
 280                            PAS_DMA_TXCHAN_CFG_TY_IFACE |
 281                            PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
 282                            PAS_DMA_TXCHAN_CFG_UP |
 283                            PAS_DMA_TXCHAN_CFG_WT(2));
 284
 285         ring->next_to_fill = 0;
 286         ring->next_to_clean = 0;
 287
 288         snprintf(ring->irq_name, sizeof(ring->irq_name),
 289                  "%s tx", dev->name);
 290         mac->tx = ring;
 291
 292         return 0;
 293
 294 out_desc:
 295         kfree(ring->desc_info);
 296 out_desc_info:
 297         kfree(ring);
 298 out_ring:
 299         return -ENOMEM;
 300 }
 301
 302 static void pasemi_mac_free_tx_resources(struct net_device *dev)
 303 {
 304         struct pasemi_mac *mac = netdev_priv(dev);
 305         unsigned int i;
 306         struct pasemi_mac_buffer *info;
 307         struct pas_dma_xct_descr *dp;
 308
 309         for (i = 0; i < TX_RING_SIZE; i++) {
 310                 info = &TX_DESC_INFO(mac, i);
 311                 dp = &TX_DESC(mac, i);
 312                 if (info->dma) {
 313                         if (info->skb) {
 314                                 pci_unmap_single(mac->dma_pdev,
 315                                                  info->dma,
 316                                                  info->skb->len,
 317                                                  PCI_DMA_TODEVICE);
 318                                 dev_kfree_skb_any(info->skb);
 319                         }
 320                         info->dma = 0;
 321                         info->skb = NULL;
 322                         dp->mactx = 0;
 323                         dp->ptr = 0;
 324                 }
 325         }
 326
 327         dma_free_coherent(&mac->dma_pdev->dev,
 328                           TX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 329                           mac->tx->desc, mac->tx->dma);
 330
 331         kfree(mac->tx->desc_info);
 332         kfree(mac->tx);
 333         mac->tx = NULL;
 334 }
 335
 336 static void pasemi_mac_free_rx_resources(struct net_device *dev)
 337 {
 338         struct pasemi_mac *mac = netdev_priv(dev);
 339         unsigned int i;
 340         struct pasemi_mac_buffer *info;
 341         struct pas_dma_xct_descr *dp;
 342
 343         for (i = 0; i < RX_RING_SIZE; i++) {
 344                 info = &RX_DESC_INFO(mac, i);
 345                 dp = &RX_DESC(mac, i);
 346                 if (info->skb) {
 347                         if (info->dma) {
 348                                 pci_unmap_single(mac->dma_pdev,
 349                                                  info->dma,
 350                                                  info->skb->len,
 351                                                  PCI_DMA_FROMDEVICE);
 352                                 dev_kfree_skb_any(info->skb);
 353                         }
 354                         info->dma = 0;
 355                         info->skb = NULL;
 356                         dp->macrx = 0;
 357                         dp->ptr = 0;
 358                 }
 359         }
 360
 361         dma_free_coherent(&mac->dma_pdev->dev,
 362                           RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 363                           mac->rx->desc, mac->rx->dma);
 364
 365         dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
 366                           mac->rx->buffers, mac->rx->buf_dma);
 367
 368         kfree(mac->rx->desc_info);
 369         kfree(mac->rx);
 370         mac->rx = NULL;
 371 }
 372
 373 static void pasemi_mac_replenish_rx_ring(struct net_device *dev)
 374 {
 375         struct pasemi_mac *mac = netdev_priv(dev);
 376         unsigned int i;
 377         int start = mac->rx->next_to_fill;
 378         unsigned int limit, count;
 379
 380         limit = RING_AVAIL(mac->rx);
 381         /* Check to see if we're doing first-time setup */
 382         if (unlikely(mac->rx->next_to_clean == 0 && mac->rx->next_to_fill == 0))
 383                 limit = RX_RING_SIZE;
 384
 385         if (limit <= 0)
 386                 return;
 387
 388         i = start;
 389         for (count = limit; count; count--) {
 390                 struct pasemi_mac_buffer *info = &RX_DESC_INFO(mac, i);
 391                 u64 *buff = &RX_BUFF(mac, i);
 392                 struct sk_buff *skb;
 393                 dma_addr_t dma;
 394
 395                 /* skb might still be in there for recycle on short receives */
 396                 if (info->skb)
 397                         skb = info->skb;
 398                 else
 399                         skb = dev_alloc_skb(BUF_SIZE);
 400
 401                 if (unlikely(!skb))
 402                         break;
 403
 404                 dma = pci_map_single(mac->dma_pdev, skb->data, skb->len,
 405                                      PCI_DMA_FROMDEVICE);
 406
 407                 if (unlikely(dma_mapping_error(dma))) {
 408                         dev_kfree_skb_irq(info->skb);
 409                         break;
 410                 }
 411
 412                 info->skb = skb;
 413                 info->dma = dma;
 414                 *buff = XCT_RXB_LEN(BUF_SIZE) | XCT_RXB_ADDR(dma);
 415                 i++;
 416         }
 417
 418         wmb();
 419
 420         write_dma_reg(mac, PAS_DMA_RXCHAN_INCR(mac->dma_rxch), limit - count);
 421         write_dma_reg(mac, PAS_DMA_RXINT_INCR(mac->dma_if), limit - count);
 422
 423         mac->rx->next_to_fill += limit - count;
 424 }
 425
 426 static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac)
 427 {
 428         unsigned int reg, pcnt;
 429         /* Re-enable packet count interrupts: finally
 430          * ack the packet count interrupt we got in rx_intr.
 431          */
 432
 433         pcnt = *mac->rx_status & PAS_STATUS_PCNT_M;
 434
 435         reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC;
 436
 437         write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
 438 }
 439
 440 static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
 441 {
 442         unsigned int reg, pcnt;
 443
 444         /* Re-enable packet count interrupts */
 445         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
 446
 447         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
 448
 449         write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
 450 }
 451
 452
 453 static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
 454 {
 455         unsigned int n;
 456         int count;
 457         struct pas_dma_xct_descr *dp;
 458         struct pasemi_mac_buffer *info;
 459         struct sk_buff *skb;
 460         unsigned int i, len;
 461         u64 macrx;
 462         dma_addr_t dma;
 463
 464         spin_lock(&mac->rx->lock);
 465
 466         n = mac->rx->next_to_clean;
 467
 468         for (count = limit; count; count--) {
 469
 470                 rmb();
 471
 472                 dp = &RX_DESC(mac, n);
 473                 prefetchw(dp);
 474                 macrx = dp->macrx;
 475
 476                 if (!(macrx & XCT_MACRX_O))
 477                         break;
 478
 479
 480                 info = NULL;
 481
 482                 /* We have to scan for our skb since there's no way
 483                  * to back-map them from the descriptor, and if we
 484                  * have several receive channels then they might not
 485                  * show up in the same order as they were put on the
 486                  * interface ring.
 487                  */
 488
 489                 dma = (dp->ptr & XCT_PTR_ADDR_M);
 490                 for (i = n; i < (n + RX_RING_SIZE); i++) {
 491                         info = &RX_DESC_INFO(mac, i);
 492                         if (info->dma == dma)
 493                                 break;
 494                 }
 495                 prefetchw(info);
 496
 497                 skb = info->skb;
 498                 prefetchw(skb);
 499                 info->dma = 0;
 500
 501                 pci_unmap_single(mac->dma_pdev, dma, skb->len,
 502                                  PCI_DMA_FROMDEVICE);
 503
 504                 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
 505
 506                 if (len < 256) {
 507                         struct sk_buff *new_skb =
 508                             netdev_alloc_skb(mac->netdev, len + NET_IP_ALIGN);
 509                         if (new_skb) {
 510                                 skb_reserve(new_skb, NET_IP_ALIGN);
 511                                 memcpy(new_skb->data, skb->data, len);
 512                                 /* save the skb in buffer_info as good */
 513                                 skb = new_skb;
 514                         }
 515                         /* else just continue with the old one */
 516                 } else
 517                         info->skb = NULL;
 518
 519                 skb_put(skb, len);
 520
 521                 if (likely((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK)) {
 522                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 523                         skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
 524                                            XCT_MACRX_CSUM_S;
 525                 } else
 526                         skb->ip_summed = CHECKSUM_NONE;
 527
 528                 mac->netdev->stats.rx_bytes += len;
 529                 mac->netdev->stats.rx_packets++;
 530
 531                 skb->protocol = eth_type_trans(skb, mac->netdev);
 532                 netif_receive_skb(skb);
 533
 534                 dp->ptr = 0;
 535                 dp->macrx = 0;
 536
 537                 n++;
 538         }
 539
 540         mac->rx->next_to_clean += limit - count;
 541         pasemi_mac_replenish_rx_ring(mac->netdev);
 542
 543         spin_unlock(&mac->rx->lock);
 544
 545         return count;
 546 }
 547
 548 static int pasemi_mac_clean_tx(struct pasemi_mac *mac)
 549 {
 550         int i;
 551         struct pasemi_mac_buffer *info;
 552         struct pas_dma_xct_descr *dp;
 553         unsigned int start, count, limit;
 554         unsigned int total_count;
 555         int flags;
 556         struct sk_buff *skbs[32];
 557         dma_addr_t dmas[32];
 558
 559         total_count = 0;
 560 restart:
 561         spin_lock_irqsave(&mac->tx->lock, flags);
 562
 563         start = mac->tx->next_to_clean;
 564         limit = min(mac->tx->next_to_fill, start+32);
 565
 566         count = 0;
 567
 568         for (i = start; i < limit; i++) {
 569                 dp = &TX_DESC(mac, i);
 570
 571                 if (unlikely(dp->mactx & XCT_MACTX_O))
 572                         /* Not yet transmitted */
 573                         break;
 574
 575                 info = &TX_DESC_INFO(mac, i);
 576                 skbs[count] = info->skb;
 577                 dmas[count] = info->dma;
 578
 579                 info->skb = NULL;
 580                 info->dma = 0;
 581                 dp->mactx = 0;
 582                 dp->ptr = 0;
 583
 584                 count++;
 585         }
 586         mac->tx->next_to_clean += count;
 587         spin_unlock_irqrestore(&mac->tx->lock, flags);
 588         netif_wake_queue(mac->netdev);
 589
 590         for (i = 0; i < count; i++) {
 591                 pci_unmap_single(mac->dma_pdev, dmas[i],
 592                                  skbs[i]->len, PCI_DMA_TODEVICE);
 593                 dev_kfree_skb_irq(skbs[i]);
 594         }
 595
 596         total_count += count;
 597
 598         /* If the batch was full, try to clean more */
 599         if (count == 32)
 600                 goto restart;
 601
 602         return total_count;
 603 }
 604
 605
 606 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
 607 {
 608         struct net_device *dev = data;
 609         struct pasemi_mac *mac = netdev_priv(dev);
 610         unsigned int reg;
 611
 612         if (!(*mac->rx_status & PAS_STATUS_CAUSE_M))
 613                 return IRQ_NONE;
 614
 615         if (*mac->rx_status & PAS_STATUS_ERROR)
 616                 printk("rx_status reported error\n");
 617
 618         /* Don't reset packet count so it won't fire again but clear
 619          * all others.
 620          */
 621
 622         reg = 0;
 623         if (*mac->rx_status & PAS_STATUS_SOFT)
 624                 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
 625         if (*mac->rx_status & PAS_STATUS_ERROR)
 626                 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
 627         if (*mac->rx_status & PAS_STATUS_TIMER)
 628                 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
 629
 630         netif_rx_schedule(dev, &mac->napi);
 631
 632         write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
 633
 634         return IRQ_HANDLED;
 635 }
 636
 637 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
 638 {
 639         struct net_device *dev = data;
 640         struct pasemi_mac *mac = netdev_priv(dev);
 641         unsigned int reg, pcnt;
 642
 643         if (!(*mac->tx_status & PAS_STATUS_CAUSE_M))
 644                 return IRQ_NONE;
 645
 646         pasemi_mac_clean_tx(mac);
 647
 648         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
 649
 650         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
 651
 652         if (*mac->tx_status & PAS_STATUS_SOFT)
 653                 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
 654         if (*mac->tx_status & PAS_STATUS_ERROR)
 655                 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
 656
 657         write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
 658
 659         return IRQ_HANDLED;
 660 }
 661
 662 static void pasemi_adjust_link(struct net_device *dev)
 663 {
 664         struct pasemi_mac *mac = netdev_priv(dev);
 665         int msg;
 666         unsigned int flags;
 667         unsigned int new_flags;
 668
 669         if (!mac->phydev->link) {
 670                 /* If no link, MAC speed settings don't matter. Just report
 671                  * link down and return.
 672                  */
 673                 if (mac->link && netif_msg_link(mac))
 674                         printk(KERN_INFO "%s: Link is down.\n", dev->name);
 675
 676                 netif_carrier_off(dev);
 677                 mac->link = 0;
 678
 679                 return;
 680         } else
 681                 netif_carrier_on(dev);
 682
 683         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
 684         new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
 685                               PAS_MAC_CFG_PCFG_TSR_M);
 686
 687         if (!mac->phydev->duplex)
 688                 new_flags |= PAS_MAC_CFG_PCFG_HD;
 689
 690         switch (mac->phydev->speed) {
 691         case 1000:
 692                 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
 693                              PAS_MAC_CFG_PCFG_TSR_1G;
 694                 break;
 695         case 100:
 696                 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
 697                              PAS_MAC_CFG_PCFG_TSR_100M;
 698                 break;
 699         case 10:
 700                 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
 701                              PAS_MAC_CFG_PCFG_TSR_10M;
 702                 break;
 703         default:
 704                 printk("Unsupported speed %d\n", mac->phydev->speed);
 705         }
 706
 707         /* Print on link or speed/duplex change */
 708         msg = mac->link != mac->phydev->link || flags != new_flags;
 709
 710         mac->duplex = mac->phydev->duplex;
 711         mac->speed = mac->phydev->speed;
 712         mac->link = mac->phydev->link;
 713
 714         if (new_flags != flags)
 715                 write_mac_reg(mac, PAS_MAC_CFG_PCFG, new_flags);
 716
 717         if (msg && netif_msg_link(mac))
 718                 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
 719                        dev->name, mac->speed, mac->duplex ? "full" : "half");
 720 }
 721
 722 static int pasemi_mac_phy_init(struct net_device *dev)
 723 {
 724         struct pasemi_mac *mac = netdev_priv(dev);
 725         struct device_node *dn, *phy_dn;
 726         struct phy_device *phydev;
 727         unsigned int phy_id;
 728         const phandle *ph;
 729         const unsigned int *prop;
 730         struct resource r;
 731         int ret;
 732
 733         dn = pci_device_to_OF_node(mac->pdev);
 734         ph = of_get_property(dn, "phy-handle", NULL);
 735         if (!ph)
 736                 return -ENODEV;
 737         phy_dn = of_find_node_by_phandle(*ph);
 738
 739         prop = of_get_property(phy_dn, "reg", NULL);
 740         ret = of_address_to_resource(phy_dn->parent, 0, &r);
 741         if (ret)
 742                 goto err;
 743
 744         phy_id = *prop;
 745         snprintf(mac->phy_id, BUS_ID_SIZE, PHY_ID_FMT, (int)r.start, phy_id);
 746
 747         of_node_put(phy_dn);
 748
 749         mac->link = 0;
 750         mac->speed = 0;
 751         mac->duplex = -1;
 752
 753         phydev = phy_connect(dev, mac->phy_id, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
 754
 755         if (IS_ERR(phydev)) {
 756                 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
 757                 return PTR_ERR(phydev);
 758         }
 759
 760         mac->phydev = phydev;
 761
 762         return 0;
 763
 764 err:
 765         of_node_put(phy_dn);
 766         return -ENODEV;
 767 }
 768
 769
 770 static int pasemi_mac_open(struct net_device *dev)
 771 {
 772         struct pasemi_mac *mac = netdev_priv(dev);
 773         int base_irq;
 774         unsigned int flags;
 775         int ret;
 776
 777         /* enable rx section */
 778         write_dma_reg(mac, PAS_DMA_COM_RXCMD, PAS_DMA_COM_RXCMD_EN);
 779
 780         /* enable tx section */
 781         write_dma_reg(mac, PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN);
 782
 783         flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
 784                 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
 785                 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
 786
 787         write_mac_reg(mac, PAS_MAC_CFG_TXP, flags);
 788
 789         flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
 790                 PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
 791
 792         flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
 793
 794         write_iob_reg(mac, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
 795                            PAS_IOB_DMA_RXCH_CFG_CNTTH(0));
 796
 797         write_iob_reg(mac, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch),
 798                            PAS_IOB_DMA_TXCH_CFG_CNTTH(128));
 799
 800         /* Clear out any residual packet count state from firmware */
 801         pasemi_mac_restart_rx_intr(mac);
 802         pasemi_mac_restart_tx_intr(mac);
 803
 804         /* 0xffffff is max value, about 16ms */
 805         write_iob_reg(mac, PAS_IOB_DMA_COM_TIMEOUTCFG,
 806                            PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
 807
 808         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
 809
 810         ret = pasemi_mac_setup_rx_resources(dev);
 811         if (ret)
 812                 goto out_rx_resources;
 813
 814         ret = pasemi_mac_setup_tx_resources(dev);
 815         if (ret)
 816                 goto out_tx_resources;
 817
 818         write_mac_reg(mac, PAS_MAC_IPC_CHNL,
 819                            PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) |
 820                            PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch));
 821
 822         /* enable rx if */
 823         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
 824                            PAS_DMA_RXINT_RCMDSTA_EN);
 825
 826         /* enable rx channel */
 827         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
 828                            PAS_DMA_RXCHAN_CCMDSTA_EN |
 829                            PAS_DMA_RXCHAN_CCMDSTA_DU);
 830
 831         /* enable tx channel */
 832         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
 833                            PAS_DMA_TXCHAN_TCMDSTA_EN);
 834
 835         pasemi_mac_replenish_rx_ring(dev);
 836
 837         ret = pasemi_mac_phy_init(dev);
 838         /* Some configs don't have PHYs (XAUI etc), so don't complain about
 839          * failed init due to -ENODEV.
 840          */
 841         if (ret && ret != -ENODEV)
 842                 dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
 843
 844         netif_start_queue(dev);
 845         napi_enable(&mac->napi);
 846
 847         /* Interrupts are a bit different for our DMA controller: While
 848          * it's got one a regular PCI device header, the interrupt there
 849          * is really the base of the range it's using. Each tx and rx
 850          * channel has it's own interrupt source.
 851          */
 852
 853         base_irq = virq_to_hw(mac->dma_pdev->irq);
 854
 855         mac->tx_irq = irq_create_mapping(NULL, base_irq + mac->dma_txch);
 856         mac->rx_irq = irq_create_mapping(NULL, base_irq + 20 + mac->dma_txch);
 857
 858         ret = request_irq(mac->tx_irq, &pasemi_mac_tx_intr, IRQF_DISABLED,
 859                           mac->tx->irq_name, dev);
 860         if (ret) {
 861                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 862                         base_irq + mac->dma_txch, ret);
 863                 goto out_tx_int;
 864         }
 865
 866         ret = request_irq(mac->rx_irq, &pasemi_mac_rx_intr, IRQF_DISABLED,
 867                           mac->rx->irq_name, dev);
 868         if (ret) {
 869                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 870                         base_irq + 20 + mac->dma_rxch, ret);
 871                 goto out_rx_int;
 872         }
 873
 874         if (mac->phydev)
 875                 phy_start(mac->phydev);
 876
 877         return 0;
 878
 879 out_rx_int:
 880         free_irq(mac->tx_irq, dev);
 881 out_tx_int:
 882         napi_disable(&mac->napi);
 883         netif_stop_queue(dev);
 884         pasemi_mac_free_tx_resources(dev);
 885 out_tx_resources:
 886         pasemi_mac_free_rx_resources(dev);
 887 out_rx_resources:
 888
 889         return ret;
 890 }
 891
 892 #define MAX_RETRIES 5000
 893
 894 static int pasemi_mac_close(struct net_device *dev)
 895 {
 896         struct pasemi_mac *mac = netdev_priv(dev);
 897         unsigned int stat;
 898         int retries;
 899
 900         if (mac->phydev) {
 901                 phy_stop(mac->phydev);
 902                 phy_disconnect(mac->phydev);
 903         }
 904
 905         netif_stop_queue(dev);
 906         napi_disable(&mac->napi);
 907
 908         /* Clean out any pending buffers */
 909         pasemi_mac_clean_tx(mac);
 910         pasemi_mac_clean_rx(mac, RX_RING_SIZE);
 911
 912         /* Disable interface */
 913         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), PAS_DMA_TXCHAN_TCMDSTA_ST);
 914         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), PAS_DMA_RXINT_RCMDSTA_ST);
 915         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), PAS_DMA_RXCHAN_CCMDSTA_ST);
 916
 917         for (retries = 0; retries < MAX_RETRIES; retries++) {
 918                 stat = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch));
 919                 if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT))
 920                         break;
 921                 cond_resched();
 922         }
 923
 924         if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)
 925                 dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel\n");
 926
 927         for (retries = 0; retries < MAX_RETRIES; retries++) {
 928                 stat = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch));
 929                 if (!(stat & PAS_DMA_RXCHAN_CCMDSTA_ACT))
 930                         break;
 931                 cond_resched();
 932         }
 933
 934         if (stat & PAS_DMA_RXCHAN_CCMDSTA_ACT)
 935                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx channel\n");
 936
 937         for (retries = 0; retries < MAX_RETRIES; retries++) {
 938                 stat = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
 939                 if (!(stat & PAS_DMA_RXINT_RCMDSTA_ACT))
 940                         break;
 941                 cond_resched();
 942         }
 943
 944         if (stat & PAS_DMA_RXINT_RCMDSTA_ACT)
 945                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx interface\n");
 946
 947         /* Then, disable the channel. This must be done separately from
 948          * stopping, since you can't disable when active.
 949          */
 950
 951         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0);
 952         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0);
 953         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
 954
 955         free_irq(mac->tx_irq, dev);
 956         free_irq(mac->rx_irq, dev);
 957
 958         /* Free resources */
 959         pasemi_mac_free_rx_resources(dev);
 960         pasemi_mac_free_tx_resources(dev);
 961
 962         return 0;
 963 }
 964
 965 static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
 966 {
 967         struct pasemi_mac *mac = netdev_priv(dev);
 968         struct pasemi_mac_txring *txring;
 969         struct pasemi_mac_buffer *info;
 970         struct pas_dma_xct_descr *dp;
 971         u64 dflags, mactx, ptr;
 972         dma_addr_t map;
 973         int flags;
 974
 975         dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_SS | XCT_MACTX_CRC_PAD;
 976
 977         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 978                 const unsigned char *nh = skb_network_header(skb);
 979
 980                 switch (ip_hdr(skb)->protocol) {
 981                 case IPPROTO_TCP:
 982                         dflags |= XCT_MACTX_CSUM_TCP;
 983                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
 984                         dflags |= XCT_MACTX_IPO(nh - skb->data);
 985                         break;
 986                 case IPPROTO_UDP:
 987                         dflags |= XCT_MACTX_CSUM_UDP;
 988                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
 989                         dflags |= XCT_MACTX_IPO(nh - skb->data);
 990                         break;
 991                 }
 992         }
 993
 994         map = pci_map_single(mac->dma_pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
 995
 996         if (dma_mapping_error(map))
 997                 return NETDEV_TX_BUSY;
 998
 999         mactx = dflags | XCT_MACTX_LLEN(skb->len);
1000         ptr   = XCT_PTR_LEN(skb->len) | XCT_PTR_ADDR(map);
1001
1002         txring = mac->tx;
1003
1004         spin_lock_irqsave(&txring->lock, flags);
1005
1006         if (RING_AVAIL(txring) <= 1) {
1007                 spin_unlock_irqrestore(&txring->lock, flags);
1008                 pasemi_mac_clean_tx(mac);
1009                 pasemi_mac_restart_tx_intr(mac);
1010                 spin_lock_irqsave(&txring->lock, flags);
1011
1012                 if (RING_AVAIL(txring) <= 1) {
1013                         /* Still no room -- stop the queue and wait for tx
1014                          * intr when there's room.
1015                          */
1016                         netif_stop_queue(dev);
1017                         goto out_err;
1018                 }
1019         }
1020
1021         dp = &TX_DESC(mac, txring->next_to_fill);
1022         info = &TX_DESC_INFO(mac, txring->next_to_fill);
1023
1024         dp->mactx = mactx;
1025         dp->ptr   = ptr;
1026         info->dma = map;
1027         info->skb = skb;
1028
1029         txring->next_to_fill++;
1030         dev->stats.tx_packets++;
1031         dev->stats.tx_bytes += skb->len;
1032
1033         spin_unlock_irqrestore(&txring->lock, flags);
1034
1035         write_dma_reg(mac, PAS_DMA_TXCHAN_INCR(mac->dma_txch), 1);
1036
1037         return NETDEV_TX_OK;
1038
1039 out_err:
1040         spin_unlock_irqrestore(&txring->lock, flags);
1041         pci_unmap_single(mac->dma_pdev, map, skb->len, PCI_DMA_TODEVICE);
1042         return NETDEV_TX_BUSY;
1043 }
1044
1045 static void pasemi_mac_set_rx_mode(struct net_device *dev)
1046 {
1047         struct pasemi_mac *mac = netdev_priv(dev);
1048         unsigned int flags;
1049
1050         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
1051
1052         /* Set promiscuous */
1053         if (dev->flags & IFF_PROMISC)
1054                 flags |= PAS_MAC_CFG_PCFG_PR;
1055         else
1056                 flags &= ~PAS_MAC_CFG_PCFG_PR;
1057
1058         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
1059 }
1060
1061
1062 static int pasemi_mac_poll(struct napi_struct *napi, int budget)
1063 {
1064         struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi);
1065         struct net_device *dev = mac->netdev;
1066         int pkts;
1067
1068         pasemi_mac_clean_tx(mac);
1069         pkts = pasemi_mac_clean_rx(mac, budget);
1070         if (pkts < budget) {
1071                 /* all done, no more packets present */
1072                 netif_rx_complete(dev, napi);
1073
1074                 pasemi_mac_restart_rx_intr(mac);
1075         }
1076         return pkts;
1077 }
1078
1079 static void __iomem * __devinit map_onedev(struct pci_dev *p, int index)
1080 {
1081         struct device_node *dn;
1082         void __iomem *ret;
1083
1084         dn = pci_device_to_OF_node(p);
1085         if (!dn)
1086                 goto fallback;
1087
1088         ret = of_iomap(dn, index);
1089         if (!ret)
1090                 goto fallback;
1091
1092         return ret;
1093 fallback:
1094         /* This is hardcoded and ugly, but we have some firmware versions
1095          * that don't provide the register space in the device tree. Luckily
1096          * they are at well-known locations so we can just do the math here.
1097          */
1098         return ioremap(0xe0000000 + (p->devfn << 12), 0x2000);
1099 }
1100
1101 static int __devinit pasemi_mac_map_regs(struct pasemi_mac *mac)
1102 {
1103         struct resource res;
1104         struct device_node *dn;
1105         int err;
1106
1107         mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1108         if (!mac->dma_pdev) {
1109                 dev_err(&mac->pdev->dev, "Can't find DMA Controller\n");
1110                 return -ENODEV;
1111         }
1112
1113         mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1114         if (!mac->iob_pdev) {
1115                 dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n");
1116                 return -ENODEV;
1117         }
1118
1119         mac->regs = map_onedev(mac->pdev, 0);
1120         mac->dma_regs = map_onedev(mac->dma_pdev, 0);
1121         mac->iob_regs = map_onedev(mac->iob_pdev, 0);
1122
1123         if (!mac->regs || !mac->dma_regs || !mac->iob_regs) {
1124                 dev_err(&mac->pdev->dev, "Can't map registers\n");
1125                 return -ENODEV;
1126         }
1127
1128         /* The dma status structure is located in the I/O bridge, and
1129          * is cache coherent.
1130          */
1131         if (!dma_status) {
1132                 dn = pci_device_to_OF_node(mac->iob_pdev);
1133                 if (dn)
1134                         err = of_address_to_resource(dn, 1, &res);
1135                 if (!dn || err) {
1136                         /* Fallback for old firmware */
1137                         res.start = 0xfd800000;
1138                         res.end = res.start + 0x1000;
1139                 }
1140                 dma_status = __ioremap(res.start, res.end-res.start, 0);
1141         }
1142
1143         return 0;
1144 }
1145
1146 static int __devinit
1147 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1148 {
1149         static int index = 0;
1150         struct net_device *dev;
1151         struct pasemi_mac *mac;
1152         int err;
1153         DECLARE_MAC_BUF(mac_buf);
1154
1155         err = pci_enable_device(pdev);
1156         if (err)
1157                 return err;
1158
1159         dev = alloc_etherdev(sizeof(struct pasemi_mac));
1160         if (dev == NULL) {
1161                 dev_err(&pdev->dev,
1162                         "pasemi_mac: Could not allocate ethernet device.\n");
1163                 err = -ENOMEM;
1164                 goto out_disable_device;
1165         }
1166
1167         pci_set_drvdata(pdev, dev);
1168         SET_NETDEV_DEV(dev, &pdev->dev);
1169
1170         mac = netdev_priv(dev);
1171
1172         mac->pdev = pdev;
1173         mac->netdev = dev;
1174
1175         netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64);
1176
1177         dev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
1178
1179         /* These should come out of the device tree eventually */
1180         mac->dma_txch = index;
1181         mac->dma_rxch = index;
1182
1183         /* We probe GMAC before XAUI, but the DMA interfaces are
1184          * in XAUI, GMAC order.
1185          */
1186         if (index < 4)
1187                 mac->dma_if = index + 2;
1188         else
1189                 mac->dma_if = index - 4;
1190         index++;
1191
1192         switch (pdev->device) {
1193         case 0xa005:
1194                 mac->type = MAC_TYPE_GMAC;
1195                 break;
1196         case 0xa006:
1197                 mac->type = MAC_TYPE_XAUI;
1198                 break;
1199         default:
1200                 err = -ENODEV;
1201                 goto out;
1202         }
1203
1204         /* get mac addr from device tree */
1205         if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1206                 err = -ENODEV;
1207                 goto out;
1208         }
1209         memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr));
1210
1211         dev->open = pasemi_mac_open;
1212         dev->stop = pasemi_mac_close;
1213         dev->hard_start_xmit = pasemi_mac_start_tx;
1214         dev->set_multicast_list = pasemi_mac_set_rx_mode;
1215
1216         err = pasemi_mac_map_regs(mac);
1217         if (err)
1218                 goto out;
1219
1220         mac->rx_status = &dma_status->rx_sta[mac->dma_rxch];
1221         mac->tx_status = &dma_status->tx_sta[mac->dma_txch];
1222
1223         mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1224
1225         /* Enable most messages by default */
1226         mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1227
1228         err = register_netdev(dev);
1229
1230         if (err) {
1231                 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1232                         err);
1233                 goto out;
1234         } else
1235                 printk(KERN_INFO "%s: PA Semi %s: intf %d, txch %d, rxch %d, "
1236                        "hw addr %s\n",
1237                        dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
1238                        mac->dma_if, mac->dma_txch, mac->dma_rxch,
1239                        print_mac(mac_buf, dev->dev_addr));
1240
1241         return err;
1242
1243 out:
1244         if (mac->iob_pdev)
1245                 pci_dev_put(mac->iob_pdev);
1246         if (mac->dma_pdev)
1247                 pci_dev_put(mac->dma_pdev);
1248         if (mac->dma_regs)
1249                 iounmap(mac->dma_regs);
1250         if (mac->iob_regs)
1251                 iounmap(mac->iob_regs);
1252         if (mac->regs)
1253                 iounmap(mac->regs);
1254
1255         free_netdev(dev);
1256 out_disable_device:
1257         pci_disable_device(pdev);
1258         return err;
1259
1260 }
1261
1262 static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
1263 {
1264         struct net_device *netdev = pci_get_drvdata(pdev);
1265         struct pasemi_mac *mac;
1266
1267         if (!netdev)
1268                 return;
1269
1270         mac = netdev_priv(netdev);
1271
1272         unregister_netdev(netdev);
1273
1274         pci_disable_device(pdev);
1275         pci_dev_put(mac->dma_pdev);
1276         pci_dev_put(mac->iob_pdev);
1277
1278         iounmap(mac->regs);
1279         iounmap(mac->dma_regs);
1280         iounmap(mac->iob_regs);
1281
1282         pci_set_drvdata(pdev, NULL);
1283         free_netdev(netdev);
1284 }
1285
1286 static struct pci_device_id pasemi_mac_pci_tbl[] = {
1287         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1288         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
1289         { },
1290 };
1291
1292 MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl);
1293
1294 static struct pci_driver pasemi_mac_driver = {
1295         .name           = "pasemi_mac",
1296         .id_table       = pasemi_mac_pci_tbl,
1297         .probe          = pasemi_mac_probe,
1298         .remove         = __devexit_p(pasemi_mac_remove),
1299 };
1300
1301 static void __exit pasemi_mac_cleanup_module(void)
1302 {
1303         pci_unregister_driver(&pasemi_mac_driver);
1304         __iounmap(dma_status);
1305         dma_status = NULL;
1306 }
1307
1308 int pasemi_mac_init_module(void)
1309 {
1310         return pci_register_driver(&pasemi_mac_driver);
1311 }
1312
1313 module_init(pasemi_mac_init_module);
1314 module_exit(pasemi_mac_cleanup_module);