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 unsigned int read_iob_reg(struct pasemi_mac *mac, unsigned int reg)
  85 {
  86         return in_le32(mac->iob_regs+reg);
  87 }
  88
  89 static void write_iob_reg(struct pasemi_mac *mac, unsigned int reg,
  90                           unsigned int val)
  91 {
  92         out_le32(mac->iob_regs+reg, val);
  93 }
  94
  95 static unsigned int read_mac_reg(struct pasemi_mac *mac, unsigned int reg)
  96 {
  97         return in_le32(mac->regs+reg);
  98 }
  99
 100 static void write_mac_reg(struct pasemi_mac *mac, unsigned int reg,
 101                           unsigned int val)
 102 {
 103         out_le32(mac->regs+reg, val);
 104 }
 105
 106 static unsigned int read_dma_reg(struct pasemi_mac *mac, unsigned int reg)
 107 {
 108         return in_le32(mac->dma_regs+reg);
 109 }
 110
 111 static void write_dma_reg(struct pasemi_mac *mac, unsigned int reg,
 112                           unsigned int val)
 113 {
 114         out_le32(mac->dma_regs+reg, val);
 115 }
 116
 117 static int pasemi_get_mac_addr(struct pasemi_mac *mac)
 118 {
 119         struct pci_dev *pdev = mac->pdev;
 120         struct device_node *dn = pci_device_to_OF_node(pdev);
 121         int len;
 122         const u8 *maddr;
 123         u8 addr[6];
 124
 125         if (!dn) {
 126                 dev_dbg(&pdev->dev,
 127                           "No device node for mac, not configuring\n");
 128                 return -ENOENT;
 129         }
 130
 131         maddr = of_get_property(dn, "local-mac-address", &len);
 132
 133         if (maddr && len == 6) {
 134                 memcpy(mac->mac_addr, maddr, 6);
 135                 return 0;
 136         }
 137
 138         /* Some old versions of firmware mistakenly uses mac-address
 139          * (and as a string) instead of a byte array in local-mac-address.
 140          */
 141
 142         if (maddr == NULL)
 143                 maddr = of_get_property(dn, "mac-address", NULL);
 144
 145         if (maddr == NULL) {
 146                 dev_warn(&pdev->dev,
 147                          "no mac address in device tree, not configuring\n");
 148                 return -ENOENT;
 149         }
 150
 151
 152         if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0],
 153                    &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) {
 154                 dev_warn(&pdev->dev,
 155                          "can't parse mac address, not configuring\n");
 156                 return -EINVAL;
 157         }
 158
 159         memcpy(mac->mac_addr, addr, 6);
 160
 161         return 0;
 162 }
 163
 164 static int pasemi_mac_setup_rx_resources(struct net_device *dev)
 165 {
 166         struct pasemi_mac_rxring *ring;
 167         struct pasemi_mac *mac = netdev_priv(dev);
 168         int chan_id = mac->dma_rxch;
 169
 170         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
 171
 172         if (!ring)
 173                 goto out_ring;
 174
 175         spin_lock_init(&ring->lock);
 176
 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->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
 257                                   TX_RING_SIZE, GFP_KERNEL);
 258         if (!ring->desc_info)
 259                 goto out_desc_info;
 260
 261         /* Allocate descriptors */
 262         ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
 263                                         TX_RING_SIZE *
 264                                         sizeof(struct pas_dma_xct_descr),
 265                                         &ring->dma, GFP_KERNEL);
 266         if (!ring->desc)
 267                 goto out_desc;
 268
 269         memset(ring->desc, 0, TX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
 270
 271         write_dma_reg(mac, PAS_DMA_TXCHAN_BASEL(chan_id),
 272                            PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma));
 273         val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32);
 274         val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 2);
 275
 276         write_dma_reg(mac, PAS_DMA_TXCHAN_BASEU(chan_id), val);
 277
 278         write_dma_reg(mac, PAS_DMA_TXCHAN_CFG(chan_id),
 279                            PAS_DMA_TXCHAN_CFG_TY_IFACE |
 280                            PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
 281                            PAS_DMA_TXCHAN_CFG_UP |
 282                            PAS_DMA_TXCHAN_CFG_WT(2));
 283
 284         ring->next_to_use = 0;
 285         ring->next_to_clean = 0;
 286
 287         snprintf(ring->irq_name, sizeof(ring->irq_name),
 288                  "%s tx", dev->name);
 289         mac->tx = ring;
 290
 291         return 0;
 292
 293 out_desc:
 294         kfree(ring->desc_info);
 295 out_desc_info:
 296         kfree(ring);
 297 out_ring:
 298         return -ENOMEM;
 299 }
 300
 301 static void pasemi_mac_free_tx_resources(struct net_device *dev)
 302 {
 303         struct pasemi_mac *mac = netdev_priv(dev);
 304         unsigned int i;
 305         struct pasemi_mac_buffer *info;
 306         struct pas_dma_xct_descr *dp;
 307
 308         for (i = 0; i < TX_RING_SIZE; i++) {
 309                 info = &TX_DESC_INFO(mac, i);
 310                 dp = &TX_DESC(mac, i);
 311                 if (info->dma) {
 312                         if (info->skb) {
 313                                 pci_unmap_single(mac->dma_pdev,
 314                                                  info->dma,
 315                                                  info->skb->len,
 316                                                  PCI_DMA_TODEVICE);
 317                                 dev_kfree_skb_any(info->skb);
 318                         }
 319                         info->dma = 0;
 320                         info->skb = NULL;
 321                         dp->mactx = 0;
 322                         dp->ptr = 0;
 323                 }
 324         }
 325
 326         dma_free_coherent(&mac->dma_pdev->dev,
 327                           TX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 328                           mac->tx->desc, mac->tx->dma);
 329
 330         kfree(mac->tx->desc_info);
 331         kfree(mac->tx);
 332         mac->tx = NULL;
 333 }
 334
 335 static void pasemi_mac_free_rx_resources(struct net_device *dev)
 336 {
 337         struct pasemi_mac *mac = netdev_priv(dev);
 338         unsigned int i;
 339         struct pasemi_mac_buffer *info;
 340         struct pas_dma_xct_descr *dp;
 341
 342         for (i = 0; i < RX_RING_SIZE; i++) {
 343                 info = &RX_DESC_INFO(mac, i);
 344                 dp = &RX_DESC(mac, i);
 345                 if (info->skb) {
 346                         if (info->dma) {
 347                                 pci_unmap_single(mac->dma_pdev,
 348                                                  info->dma,
 349                                                  info->skb->len,
 350                                                  PCI_DMA_FROMDEVICE);
 351                                 dev_kfree_skb_any(info->skb);
 352                         }
 353                         info->dma = 0;
 354                         info->skb = NULL;
 355                         dp->macrx = 0;
 356                         dp->ptr = 0;
 357                 }
 358         }
 359
 360         dma_free_coherent(&mac->dma_pdev->dev,
 361                           RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 362                           mac->rx->desc, mac->rx->dma);
 363
 364         dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
 365                           mac->rx->buffers, mac->rx->buf_dma);
 366
 367         kfree(mac->rx->desc_info);
 368         kfree(mac->rx);
 369         mac->rx = NULL;
 370 }
 371
 372 static void pasemi_mac_replenish_rx_ring(struct net_device *dev)
 373 {
 374         struct pasemi_mac *mac = netdev_priv(dev);
 375         unsigned int i;
 376         int start = mac->rx->next_to_fill;
 377         unsigned int limit, count;
 378
 379         limit = (mac->rx->next_to_clean + RX_RING_SIZE -
 380                  mac->rx->next_to_fill) & (RX_RING_SIZE - 1);
 381
 382         /* Check to see if we're doing first-time setup */
 383         if (unlikely(mac->rx->next_to_clean == 0 && mac->rx->next_to_fill == 0))
 384                 limit = RX_RING_SIZE;
 385
 386         if (limit <= 0)
 387                 return;
 388
 389         i = start;
 390         for (count = limit; count; count--) {
 391                 struct pasemi_mac_buffer *info = &RX_DESC_INFO(mac, i);
 392                 u64 *buff = &RX_BUFF(mac, i);
 393                 struct sk_buff *skb;
 394                 dma_addr_t dma;
 395
 396                 /* skb might still be in there for recycle on short receives */
 397                 if (info->skb)
 398                         skb = info->skb;
 399                 else
 400                         skb = dev_alloc_skb(BUF_SIZE);
 401
 402                 if (unlikely(!skb))
 403                         break;
 404
 405                 dma = pci_map_single(mac->dma_pdev, skb->data, skb->len,
 406                                      PCI_DMA_FROMDEVICE);
 407
 408                 if (unlikely(dma_mapping_error(dma))) {
 409                         dev_kfree_skb_irq(info->skb);
 410                         break;
 411                 }
 412
 413                 info->skb = skb;
 414                 info->dma = dma;
 415                 *buff = XCT_RXB_LEN(BUF_SIZE) | XCT_RXB_ADDR(dma);
 416                 i++;
 417         }
 418
 419         wmb();
 420
 421         write_dma_reg(mac, PAS_DMA_RXCHAN_INCR(mac->dma_rxch), limit - count);
 422         write_dma_reg(mac, PAS_DMA_RXINT_INCR(mac->dma_if), limit - count);
 423
 424         mac->rx->next_to_fill += limit - count;
 425 }
 426
 427 static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac)
 428 {
 429         unsigned int reg, pcnt;
 430         /* Re-enable packet count interrupts: finally
 431          * ack the packet count interrupt we got in rx_intr.
 432          */
 433
 434         pcnt = *mac->rx_status & PAS_STATUS_PCNT_M;
 435
 436         reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC;
 437
 438         write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
 439 }
 440
 441 static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
 442 {
 443         unsigned int reg, pcnt;
 444
 445         /* Re-enable packet count interrupts */
 446         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
 447
 448         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
 449
 450         write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
 451 }
 452
 453
 454 static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
 455 {
 456         unsigned int n;
 457         int count;
 458         struct pas_dma_xct_descr *dp;
 459         struct pasemi_mac_buffer *info;
 460         struct sk_buff *skb;
 461         unsigned int i, len;
 462         u64 macrx;
 463         dma_addr_t dma;
 464
 465         spin_lock(&mac->rx->lock);
 466
 467         n = mac->rx->next_to_clean;
 468
 469         for (count = limit; count; count--) {
 470
 471                 rmb();
 472
 473                 dp = &RX_DESC(mac, n);
 474                 prefetchw(dp);
 475                 macrx = dp->macrx;
 476
 477                 if (!(macrx & XCT_MACRX_O))
 478                         break;
 479
 480
 481                 info = NULL;
 482
 483                 /* We have to scan for our skb since there's no way
 484                  * to back-map them from the descriptor, and if we
 485                  * have several receive channels then they might not
 486                  * show up in the same order as they were put on the
 487                  * interface ring.
 488                  */
 489
 490                 dma = (dp->ptr & XCT_PTR_ADDR_M);
 491                 for (i = n; i < (n + RX_RING_SIZE); i++) {
 492                         info = &RX_DESC_INFO(mac, i);
 493                         if (info->dma == dma)
 494                                 break;
 495                 }
 496                 prefetchw(info);
 497
 498                 skb = info->skb;
 499                 prefetchw(skb);
 500                 info->dma = 0;
 501
 502                 pci_unmap_single(mac->dma_pdev, dma, skb->len,
 503                                  PCI_DMA_FROMDEVICE);
 504
 505                 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
 506
 507                 if (len < 256) {
 508                         struct sk_buff *new_skb =
 509                             netdev_alloc_skb(mac->netdev, len + NET_IP_ALIGN);
 510                         if (new_skb) {
 511                                 skb_reserve(new_skb, NET_IP_ALIGN);
 512                                 memcpy(new_skb->data, skb->data, len);
 513                                 /* save the skb in buffer_info as good */
 514                                 skb = new_skb;
 515                         }
 516                         /* else just continue with the old one */
 517                 } else
 518                         info->skb = NULL;
 519
 520                 skb_put(skb, len);
 521
 522                 if (likely((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK)) {
 523                         skb->ip_summed = CHECKSUM_COMPLETE;
 524                         skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
 525                                            XCT_MACRX_CSUM_S;
 526                 } else
 527                         skb->ip_summed = CHECKSUM_NONE;
 528
 529                 mac->stats.rx_bytes += len;
 530                 mac->stats.rx_packets++;
 531
 532                 skb->protocol = eth_type_trans(skb, mac->netdev);
 533                 netif_receive_skb(skb);
 534
 535                 dp->ptr = 0;
 536                 dp->macrx = 0;
 537
 538                 n++;
 539         }
 540
 541         mac->rx->next_to_clean += limit - count;
 542         pasemi_mac_replenish_rx_ring(mac->netdev);
 543
 544         spin_unlock(&mac->rx->lock);
 545
 546         return count;
 547 }
 548
 549 static int pasemi_mac_clean_tx(struct pasemi_mac *mac)
 550 {
 551         int i;
 552         struct pasemi_mac_buffer *info;
 553         struct pas_dma_xct_descr *dp;
 554         unsigned int start, count, limit;
 555         unsigned int total_count;
 556         int flags;
 557         struct sk_buff *skbs[32];
 558         dma_addr_t dmas[32];
 559
 560         total_count = 0;
 561 restart:
 562         spin_lock_irqsave(&mac->tx->lock, flags);
 563
 564         start = mac->tx->next_to_clean;
 565         limit = min(mac->tx->next_to_use, start+32);
 566
 567         count = 0;
 568
 569         for (i = start; i < limit; i++) {
 570                 dp = &TX_DESC(mac, i);
 571
 572                 if (unlikely(dp->mactx & XCT_MACTX_O))
 573                         /* Not yet transmitted */
 574                         break;
 575
 576                 info = &TX_DESC_INFO(mac, i);
 577                 skbs[count] = info->skb;
 578                 dmas[count] = info->dma;
 579
 580                 info->skb = NULL;
 581                 info->dma = 0;
 582                 dp->mactx = 0;
 583                 dp->ptr = 0;
 584
 585                 count++;
 586         }
 587         mac->tx->next_to_clean += count;
 588         spin_unlock_irqrestore(&mac->tx->lock, flags);
 589         netif_wake_queue(mac->netdev);
 590
 591         for (i = 0; i < count; i++) {
 592                 pci_unmap_single(mac->dma_pdev, dmas[i],
 593                                  skbs[i]->len, PCI_DMA_TODEVICE);
 594                 dev_kfree_skb_irq(skbs[i]);
 595         }
 596
 597         total_count += count;
 598
 599         /* If the batch was full, try to clean more */
 600         if (count == 32)
 601                 goto restart;
 602
 603         return total_count;
 604 }
 605
 606
 607 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
 608 {
 609         struct net_device *dev = data;
 610         struct pasemi_mac *mac = netdev_priv(dev);
 611         unsigned int reg;
 612
 613         if (!(*mac->rx_status & PAS_STATUS_CAUSE_M))
 614                 return IRQ_NONE;
 615
 616         if (*mac->rx_status & PAS_STATUS_ERROR)
 617                 printk("rx_status reported error\n");
 618
 619         /* Don't reset packet count so it won't fire again but clear
 620          * all others.
 621          */
 622
 623         reg = 0;
 624         if (*mac->rx_status & PAS_STATUS_SOFT)
 625                 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
 626         if (*mac->rx_status & PAS_STATUS_ERROR)
 627                 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
 628         if (*mac->rx_status & PAS_STATUS_TIMER)
 629                 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
 630
 631         netif_rx_schedule(dev, &mac->napi);
 632
 633         write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
 634
 635         return IRQ_HANDLED;
 636 }
 637
 638 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
 639 {
 640         struct net_device *dev = data;
 641         struct pasemi_mac *mac = netdev_priv(dev);
 642         unsigned int reg, pcnt;
 643
 644         if (!(*mac->tx_status & PAS_STATUS_CAUSE_M))
 645                 return IRQ_NONE;
 646
 647         pasemi_mac_clean_tx(mac);
 648
 649         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
 650
 651         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
 652
 653         if (*mac->tx_status & PAS_STATUS_SOFT)
 654                 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
 655         if (*mac->tx_status & PAS_STATUS_ERROR)
 656                 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
 657
 658         write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
 659
 660         return IRQ_HANDLED;
 661 }
 662
 663 static void pasemi_adjust_link(struct net_device *dev)
 664 {
 665         struct pasemi_mac *mac = netdev_priv(dev);
 666         int msg;
 667         unsigned int flags;
 668         unsigned int new_flags;
 669
 670         if (!mac->phydev->link) {
 671                 /* If no link, MAC speed settings don't matter. Just report
 672                  * link down and return.
 673                  */
 674                 if (mac->link && netif_msg_link(mac))
 675                         printk(KERN_INFO "%s: Link is down.\n", dev->name);
 676
 677                 netif_carrier_off(dev);
 678                 mac->link = 0;
 679
 680                 return;
 681         } else
 682                 netif_carrier_on(dev);
 683
 684         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
 685         new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
 686                               PAS_MAC_CFG_PCFG_TSR_M);
 687
 688         if (!mac->phydev->duplex)
 689                 new_flags |= PAS_MAC_CFG_PCFG_HD;
 690
 691         switch (mac->phydev->speed) {
 692         case 1000:
 693                 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
 694                              PAS_MAC_CFG_PCFG_TSR_1G;
 695                 break;
 696         case 100:
 697                 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
 698                              PAS_MAC_CFG_PCFG_TSR_100M;
 699                 break;
 700         case 10:
 701                 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
 702                              PAS_MAC_CFG_PCFG_TSR_10M;
 703                 break;
 704         default:
 705                 printk("Unsupported speed %d\n", mac->phydev->speed);
 706         }
 707
 708         /* Print on link or speed/duplex change */
 709         msg = mac->link != mac->phydev->link || flags != new_flags;
 710
 711         mac->duplex = mac->phydev->duplex;
 712         mac->speed = mac->phydev->speed;
 713         mac->link = mac->phydev->link;
 714
 715         if (new_flags != flags)
 716                 write_mac_reg(mac, PAS_MAC_CFG_PCFG, new_flags);
 717
 718         if (msg && netif_msg_link(mac))
 719                 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
 720                        dev->name, mac->speed, mac->duplex ? "full" : "half");
 721 }
 722
 723 static int pasemi_mac_phy_init(struct net_device *dev)
 724 {
 725         struct pasemi_mac *mac = netdev_priv(dev);
 726         struct device_node *dn, *phy_dn;
 727         struct phy_device *phydev;
 728         unsigned int phy_id;
 729         const phandle *ph;
 730         const unsigned int *prop;
 731         struct resource r;
 732         int ret;
 733
 734         dn = pci_device_to_OF_node(mac->pdev);
 735         ph = of_get_property(dn, "phy-handle", NULL);
 736         if (!ph)
 737                 return -ENODEV;
 738         phy_dn = of_find_node_by_phandle(*ph);
 739
 740         prop = of_get_property(phy_dn, "reg", NULL);
 741         ret = of_address_to_resource(phy_dn->parent, 0, &r);
 742         if (ret)
 743                 goto err;
 744
 745         phy_id = *prop;
 746         snprintf(mac->phy_id, BUS_ID_SIZE, PHY_ID_FMT, (int)r.start, phy_id);
 747
 748         of_node_put(phy_dn);
 749
 750         mac->link = 0;
 751         mac->speed = 0;
 752         mac->duplex = -1;
 753
 754         phydev = phy_connect(dev, mac->phy_id, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
 755
 756         if (IS_ERR(phydev)) {
 757                 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
 758                 return PTR_ERR(phydev);
 759         }
 760
 761         mac->phydev = phydev;
 762
 763         return 0;
 764
 765 err:
 766         of_node_put(phy_dn);
 767         return -ENODEV;
 768 }
 769
 770
 771 static int pasemi_mac_open(struct net_device *dev)
 772 {
 773         struct pasemi_mac *mac = netdev_priv(dev);
 774         int base_irq;
 775         unsigned int flags;
 776         int ret;
 777
 778         /* enable rx section */
 779         write_dma_reg(mac, PAS_DMA_COM_RXCMD, PAS_DMA_COM_RXCMD_EN);
 780
 781         /* enable tx section */
 782         write_dma_reg(mac, PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN);
 783
 784         flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
 785                 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
 786                 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
 787
 788         write_mac_reg(mac, PAS_MAC_CFG_TXP, flags);
 789
 790         flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
 791                 PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
 792
 793         flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
 794
 795         write_iob_reg(mac, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
 796                            PAS_IOB_DMA_RXCH_CFG_CNTTH(0));
 797
 798         write_iob_reg(mac, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch),
 799                            PAS_IOB_DMA_TXCH_CFG_CNTTH(128));
 800
 801         /* Clear out any residual packet count state from firmware */
 802         pasemi_mac_restart_rx_intr(mac);
 803         pasemi_mac_restart_tx_intr(mac);
 804
 805         /* 0xffffff is max value, about 16ms */
 806         write_iob_reg(mac, PAS_IOB_DMA_COM_TIMEOUTCFG,
 807                            PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
 808
 809         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
 810
 811         ret = pasemi_mac_setup_rx_resources(dev);
 812         if (ret)
 813                 goto out_rx_resources;
 814
 815         ret = pasemi_mac_setup_tx_resources(dev);
 816         if (ret)
 817                 goto out_tx_resources;
 818
 819         write_mac_reg(mac, PAS_MAC_IPC_CHNL,
 820                            PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) |
 821                            PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch));
 822
 823         /* enable rx if */
 824         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
 825                            PAS_DMA_RXINT_RCMDSTA_EN);
 826
 827         /* enable rx channel */
 828         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
 829                            PAS_DMA_RXCHAN_CCMDSTA_EN |
 830                            PAS_DMA_RXCHAN_CCMDSTA_DU);
 831
 832         /* enable tx channel */
 833         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
 834                            PAS_DMA_TXCHAN_TCMDSTA_EN);
 835
 836         pasemi_mac_replenish_rx_ring(dev);
 837
 838         ret = pasemi_mac_phy_init(dev);
 839         /* Some configs don't have PHYs (XAUI etc), so don't complain about
 840          * failed init due to -ENODEV.
 841          */
 842         if (ret && ret != -ENODEV)
 843                 dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
 844
 845         netif_start_queue(dev);
 846         napi_enable(&mac->napi);
 847
 848         /* Interrupts are a bit different for our DMA controller: While
 849          * it's got one a regular PCI device header, the interrupt there
 850          * is really the base of the range it's using. Each tx and rx
 851          * channel has it's own interrupt source.
 852          */
 853
 854         base_irq = virq_to_hw(mac->dma_pdev->irq);
 855
 856         mac->tx_irq = irq_create_mapping(NULL, base_irq + mac->dma_txch);
 857         mac->rx_irq = irq_create_mapping(NULL, base_irq + 20 + mac->dma_txch);
 858
 859         ret = request_irq(mac->tx_irq, &pasemi_mac_tx_intr, IRQF_DISABLED,
 860                           mac->tx->irq_name, dev);
 861         if (ret) {
 862                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 863                         base_irq + mac->dma_txch, ret);
 864                 goto out_tx_int;
 865         }
 866
 867         ret = request_irq(mac->rx_irq, &pasemi_mac_rx_intr, IRQF_DISABLED,
 868                           mac->rx->irq_name, dev);
 869         if (ret) {
 870                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 871                         base_irq + 20 + mac->dma_rxch, ret);
 872                 goto out_rx_int;
 873         }
 874
 875         if (mac->phydev)
 876                 phy_start(mac->phydev);
 877
 878         return 0;
 879
 880 out_rx_int:
 881         free_irq(mac->tx_irq, dev);
 882 out_tx_int:
 883         napi_disable(&mac->napi);
 884         netif_stop_queue(dev);
 885         pasemi_mac_free_tx_resources(dev);
 886 out_tx_resources:
 887         pasemi_mac_free_rx_resources(dev);
 888 out_rx_resources:
 889
 890         return ret;
 891 }
 892
 893 #define MAX_RETRIES 5000
 894
 895 static int pasemi_mac_close(struct net_device *dev)
 896 {
 897         struct pasemi_mac *mac = netdev_priv(dev);
 898         unsigned int stat;
 899         int retries;
 900
 901         if (mac->phydev) {
 902                 phy_stop(mac->phydev);
 903                 phy_disconnect(mac->phydev);
 904         }
 905
 906         netif_stop_queue(dev);
 907         napi_disable(&mac->napi);
 908
 909         /* Clean out any pending buffers */
 910         pasemi_mac_clean_tx(mac);
 911         pasemi_mac_clean_rx(mac, RX_RING_SIZE);
 912
 913         /* Disable interface */
 914         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), PAS_DMA_TXCHAN_TCMDSTA_ST);
 915         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), PAS_DMA_RXINT_RCMDSTA_ST);
 916         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), PAS_DMA_RXCHAN_CCMDSTA_ST);
 917
 918         for (retries = 0; retries < MAX_RETRIES; retries++) {
 919                 stat = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch));
 920                 if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT))
 921                         break;
 922                 cond_resched();
 923         }
 924
 925         if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)
 926                 dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel\n");
 927
 928         for (retries = 0; retries < MAX_RETRIES; retries++) {
 929                 stat = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch));
 930                 if (!(stat & PAS_DMA_RXCHAN_CCMDSTA_ACT))
 931                         break;
 932                 cond_resched();
 933         }
 934
 935         if (stat & PAS_DMA_RXCHAN_CCMDSTA_ACT)
 936                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx channel\n");
 937
 938         for (retries = 0; retries < MAX_RETRIES; retries++) {
 939                 stat = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
 940                 if (!(stat & PAS_DMA_RXINT_RCMDSTA_ACT))
 941                         break;
 942                 cond_resched();
 943         }
 944
 945         if (stat & PAS_DMA_RXINT_RCMDSTA_ACT)
 946                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx interface\n");
 947
 948         /* Then, disable the channel. This must be done separately from
 949          * stopping, since you can't disable when active.
 950          */
 951
 952         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0);
 953         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0);
 954         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
 955
 956         free_irq(mac->tx_irq, dev);
 957         free_irq(mac->rx_irq, dev);
 958
 959         /* Free resources */
 960         pasemi_mac_free_rx_resources(dev);
 961         pasemi_mac_free_tx_resources(dev);
 962
 963         return 0;
 964 }
 965
 966 static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
 967 {
 968         struct pasemi_mac *mac = netdev_priv(dev);
 969         struct pasemi_mac_txring *txring;
 970         struct pasemi_mac_buffer *info;
 971         struct pas_dma_xct_descr *dp;
 972         u64 dflags, mactx, ptr;
 973         dma_addr_t map;
 974         int flags;
 975
 976         dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_SS | XCT_MACTX_CRC_PAD;
 977
 978         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 979                 const unsigned char *nh = skb_network_header(skb);
 980
 981                 switch (ip_hdr(skb)->protocol) {
 982                 case IPPROTO_TCP:
 983                         dflags |= XCT_MACTX_CSUM_TCP;
 984                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
 985                         dflags |= XCT_MACTX_IPO(nh - skb->data);
 986                         break;
 987                 case IPPROTO_UDP:
 988                         dflags |= XCT_MACTX_CSUM_UDP;
 989                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
 990                         dflags |= XCT_MACTX_IPO(nh - skb->data);
 991                         break;
 992                 }
 993         }
 994
 995         map = pci_map_single(mac->dma_pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
 996
 997         if (dma_mapping_error(map))
 998                 return NETDEV_TX_BUSY;
 999
1000         mactx = dflags | XCT_MACTX_LLEN(skb->len);
1001         ptr   = XCT_PTR_LEN(skb->len) | XCT_PTR_ADDR(map);
1002
1003         txring = mac->tx;
1004
1005         spin_lock_irqsave(&txring->lock, flags);
1006
1007         if (txring->next_to_clean - txring->next_to_use == TX_RING_SIZE) {
1008                 spin_unlock_irqrestore(&txring->lock, flags);
1009                 pasemi_mac_clean_tx(mac);
1010                 pasemi_mac_restart_tx_intr(mac);
1011                 spin_lock_irqsave(&txring->lock, flags);
1012
1013                 if (txring->next_to_clean - txring->next_to_use ==
1014                     TX_RING_SIZE) {
1015                         /* Still no room -- stop the queue and wait for tx
1016                          * intr when there's room.
1017                          */
1018                         netif_stop_queue(dev);
1019                         goto out_err;
1020                 }
1021         }
1022
1023         dp = &TX_DESC(mac, txring->next_to_use);
1024         info = &TX_DESC_INFO(mac, txring->next_to_use);
1025
1026         dp->mactx = mactx;
1027         dp->ptr   = ptr;
1028         info->dma = map;
1029         info->skb = skb;
1030
1031         txring->next_to_use++;
1032         mac->stats.tx_packets++;
1033         mac->stats.tx_bytes += skb->len;
1034
1035         spin_unlock_irqrestore(&txring->lock, flags);
1036
1037         write_dma_reg(mac, PAS_DMA_TXCHAN_INCR(mac->dma_txch), 1);
1038
1039         return NETDEV_TX_OK;
1040
1041 out_err:
1042         spin_unlock_irqrestore(&txring->lock, flags);
1043         pci_unmap_single(mac->dma_pdev, map, skb->len, PCI_DMA_TODEVICE);
1044         return NETDEV_TX_BUSY;
1045 }
1046
1047 static struct net_device_stats *pasemi_mac_get_stats(struct net_device *dev)
1048 {
1049         struct pasemi_mac *mac = netdev_priv(dev);
1050
1051         return &mac->stats;
1052 }
1053
1054
1055 static void pasemi_mac_set_rx_mode(struct net_device *dev)
1056 {
1057         struct pasemi_mac *mac = netdev_priv(dev);
1058         unsigned int flags;
1059
1060         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
1061
1062         /* Set promiscuous */
1063         if (dev->flags & IFF_PROMISC)
1064                 flags |= PAS_MAC_CFG_PCFG_PR;
1065         else
1066                 flags &= ~PAS_MAC_CFG_PCFG_PR;
1067
1068         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
1069 }
1070
1071
1072 static int pasemi_mac_poll(struct napi_struct *napi, int budget)
1073 {
1074         struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi);
1075         struct net_device *dev = mac->netdev;
1076         int pkts;
1077
1078         pkts = pasemi_mac_clean_rx(mac, budget);
1079         if (pkts < budget) {
1080                 /* all done, no more packets present */
1081                 netif_rx_complete(dev, napi);
1082
1083                 pasemi_mac_restart_rx_intr(mac);
1084         }
1085         return pkts;
1086 }
1087
1088 static void __iomem * __devinit map_onedev(struct pci_dev *p, int index)
1089 {
1090         struct device_node *dn;
1091         void __iomem *ret;
1092
1093         dn = pci_device_to_OF_node(p);
1094         if (!dn)
1095                 goto fallback;
1096
1097         ret = of_iomap(dn, index);
1098         if (!ret)
1099                 goto fallback;
1100
1101         return ret;
1102 fallback:
1103         /* This is hardcoded and ugly, but we have some firmware versions
1104          * that don't provide the register space in the device tree. Luckily
1105          * they are at well-known locations so we can just do the math here.
1106          */
1107         return ioremap(0xe0000000 + (p->devfn << 12), 0x2000);
1108 }
1109
1110 static int __devinit pasemi_mac_map_regs(struct pasemi_mac *mac)
1111 {
1112         struct resource res;
1113         struct device_node *dn;
1114         int err;
1115
1116         mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1117         if (!mac->dma_pdev) {
1118                 dev_err(&mac->pdev->dev, "Can't find DMA Controller\n");
1119                 return -ENODEV;
1120         }
1121
1122         mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1123         if (!mac->iob_pdev) {
1124                 dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n");
1125                 return -ENODEV;
1126         }
1127
1128         mac->regs = map_onedev(mac->pdev, 0);
1129         mac->dma_regs = map_onedev(mac->dma_pdev, 0);
1130         mac->iob_regs = map_onedev(mac->iob_pdev, 0);
1131
1132         if (!mac->regs || !mac->dma_regs || !mac->iob_regs) {
1133                 dev_err(&mac->pdev->dev, "Can't map registers\n");
1134                 return -ENODEV;
1135         }
1136
1137         /* The dma status structure is located in the I/O bridge, and
1138          * is cache coherent.
1139          */
1140         if (!dma_status) {
1141                 dn = pci_device_to_OF_node(mac->iob_pdev);
1142                 if (dn)
1143                         err = of_address_to_resource(dn, 1, &res);
1144                 if (!dn || err) {
1145                         /* Fallback for old firmware */
1146                         res.start = 0xfd800000;
1147                         res.end = res.start + 0x1000;
1148                 }
1149                 dma_status = __ioremap(res.start, res.end-res.start, 0);
1150         }
1151
1152         return 0;
1153 }
1154
1155 static int __devinit
1156 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1157 {
1158         static int index = 0;
1159         struct net_device *dev;
1160         struct pasemi_mac *mac;
1161         int err;
1162
1163         err = pci_enable_device(pdev);
1164         if (err)
1165                 return err;
1166
1167         dev = alloc_etherdev(sizeof(struct pasemi_mac));
1168         if (dev == NULL) {
1169                 dev_err(&pdev->dev,
1170                         "pasemi_mac: Could not allocate ethernet device.\n");
1171                 err = -ENOMEM;
1172                 goto out_disable_device;
1173         }
1174
1175         SET_MODULE_OWNER(dev);
1176         pci_set_drvdata(pdev, dev);
1177         SET_NETDEV_DEV(dev, &pdev->dev);
1178
1179         mac = netdev_priv(dev);
1180
1181         mac->pdev = pdev;
1182         mac->netdev = dev;
1183
1184         netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64);
1185
1186         dev->features = NETIF_F_HW_CSUM;
1187
1188         /* These should come out of the device tree eventually */
1189         mac->dma_txch = index;
1190         mac->dma_rxch = index;
1191
1192         /* We probe GMAC before XAUI, but the DMA interfaces are
1193          * in XAUI, GMAC order.
1194          */
1195         if (index < 4)
1196                 mac->dma_if = index + 2;
1197         else
1198                 mac->dma_if = index - 4;
1199         index++;
1200
1201         switch (pdev->device) {
1202         case 0xa005:
1203                 mac->type = MAC_TYPE_GMAC;
1204                 break;
1205         case 0xa006:
1206                 mac->type = MAC_TYPE_XAUI;
1207                 break;
1208         default:
1209                 err = -ENODEV;
1210                 goto out;
1211         }
1212
1213         /* get mac addr from device tree */
1214         if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1215                 err = -ENODEV;
1216                 goto out;
1217         }
1218         memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr));
1219
1220         dev->open = pasemi_mac_open;
1221         dev->stop = pasemi_mac_close;
1222         dev->hard_start_xmit = pasemi_mac_start_tx;
1223         dev->get_stats = pasemi_mac_get_stats;
1224         dev->set_multicast_list = pasemi_mac_set_rx_mode;
1225
1226         err = pasemi_mac_map_regs(mac);
1227         if (err)
1228                 goto out;
1229
1230         mac->rx_status = &dma_status->rx_sta[mac->dma_rxch];
1231         mac->tx_status = &dma_status->tx_sta[mac->dma_txch];
1232
1233         mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1234
1235         /* Enable most messages by default */
1236         mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1237
1238         err = register_netdev(dev);
1239
1240         if (err) {
1241                 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1242                         err);
1243                 goto out;
1244         } else
1245                 printk(KERN_INFO "%s: PA Semi %s: intf %d, txch %d, rxch %d, "
1246                        "hw addr %02x:%02x:%02x:%02x:%02x:%02x\n",
1247                        dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
1248                        mac->dma_if, mac->dma_txch, mac->dma_rxch,
1249                        dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
1250                        dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
1251
1252         return err;
1253
1254 out:
1255         if (mac->iob_pdev)
1256                 pci_dev_put(mac->iob_pdev);
1257         if (mac->dma_pdev)
1258                 pci_dev_put(mac->dma_pdev);
1259         if (mac->dma_regs)
1260                 iounmap(mac->dma_regs);
1261         if (mac->iob_regs)
1262                 iounmap(mac->iob_regs);
1263         if (mac->regs)
1264                 iounmap(mac->regs);
1265
1266         free_netdev(dev);
1267 out_disable_device:
1268         pci_disable_device(pdev);
1269         return err;
1270
1271 }
1272
1273 static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
1274 {
1275         struct net_device *netdev = pci_get_drvdata(pdev);
1276         struct pasemi_mac *mac;
1277
1278         if (!netdev)
1279                 return;
1280
1281         mac = netdev_priv(netdev);
1282
1283         unregister_netdev(netdev);
1284
1285         pci_disable_device(pdev);
1286         pci_dev_put(mac->dma_pdev);
1287         pci_dev_put(mac->iob_pdev);
1288
1289         iounmap(mac->regs);
1290         iounmap(mac->dma_regs);
1291         iounmap(mac->iob_regs);
1292
1293         pci_set_drvdata(pdev, NULL);
1294         free_netdev(netdev);
1295 }
1296
1297 static struct pci_device_id pasemi_mac_pci_tbl[] = {
1298         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1299         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
1300         { },
1301 };
1302
1303 MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl);
1304
1305 static struct pci_driver pasemi_mac_driver = {
1306         .name           = "pasemi_mac",
1307         .id_table       = pasemi_mac_pci_tbl,
1308         .probe          = pasemi_mac_probe,
1309         .remove         = __devexit_p(pasemi_mac_remove),
1310 };
1311
1312 static void __exit pasemi_mac_cleanup_module(void)
1313 {
1314         pci_unregister_driver(&pasemi_mac_driver);
1315         __iounmap(dma_status);
1316         dma_status = NULL;
1317 }
1318
1319 int pasemi_mac_init_module(void)
1320 {
1321         return pci_register_driver(&pasemi_mac_driver);
1322 }
1323
1324 module_init(pasemi_mac_init_module);
1325 module_exit(pasemi_mac_cleanup_module);