SAFE public projects git trees. - safe/jmp/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 unsigned int read_iob_reg(struct pasemi_mac *mac, unsigned int reg)
  89 {
  90         return in_le32(mac->iob_regs+reg);
  91 }
  92
  93 static void write_iob_reg(struct pasemi_mac *mac, unsigned int reg,
  94                           unsigned int val)
  95 {
  96         out_le32(mac->iob_regs+reg, val);
  97 }
  98
  99 static unsigned int read_mac_reg(struct pasemi_mac *mac, unsigned int reg)
 100 {
 101         return in_le32(mac->regs+reg);
 102 }
 103
 104 static void write_mac_reg(struct pasemi_mac *mac, unsigned int reg,
 105                           unsigned int val)
 106 {
 107         out_le32(mac->regs+reg, val);
 108 }
 109
 110 static unsigned int read_dma_reg(struct pasemi_mac *mac, unsigned int reg)
 111 {
 112         return in_le32(mac->dma_regs+reg);
 113 }
 114
 115 static void write_dma_reg(struct pasemi_mac *mac, unsigned int reg,
 116                           unsigned int val)
 117 {
 118         out_le32(mac->dma_regs+reg, val);
 119 }
 120
 121 static int pasemi_get_mac_addr(struct pasemi_mac *mac)
 122 {
 123         struct pci_dev *pdev = mac->pdev;
 124         struct device_node *dn = pci_device_to_OF_node(pdev);
 125         int len;
 126         const u8 *maddr;
 127         u8 addr[6];
 128
 129         if (!dn) {
 130                 dev_dbg(&pdev->dev,
 131                           "No device node for mac, not configuring\n");
 132                 return -ENOENT;
 133         }
 134
 135         maddr = of_get_property(dn, "local-mac-address", &len);
 136
 137         if (maddr && len == 6) {
 138                 memcpy(mac->mac_addr, maddr, 6);
 139                 return 0;
 140         }
 141
 142         /* Some old versions of firmware mistakenly uses mac-address
 143          * (and as a string) instead of a byte array in local-mac-address.
 144          */
 145
 146         if (maddr == NULL)
 147                 maddr = of_get_property(dn, "mac-address", NULL);
 148
 149         if (maddr == NULL) {
 150                 dev_warn(&pdev->dev,
 151                          "no mac address in device tree, not configuring\n");
 152                 return -ENOENT;
 153         }
 154
 155
 156         if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0],
 157                    &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) {
 158                 dev_warn(&pdev->dev,
 159                          "can't parse mac address, not configuring\n");
 160                 return -EINVAL;
 161         }
 162
 163         memcpy(mac->mac_addr, addr, 6);
 164
 165         return 0;
 166 }
 167
 168 static int pasemi_mac_setup_rx_resources(struct net_device *dev)
 169 {
 170         struct pasemi_mac_rxring *ring;
 171         struct pasemi_mac *mac = netdev_priv(dev);
 172         int chan_id = mac->dma_rxch;
 173
 174         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
 175
 176         if (!ring)
 177                 goto out_ring;
 178
 179         spin_lock_init(&ring->lock);
 180
 181         ring->size = RX_RING_SIZE;
 182         ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
 183                                   RX_RING_SIZE, GFP_KERNEL);
 184
 185         if (!ring->desc_info)
 186                 goto out_desc_info;
 187
 188         /* Allocate descriptors */
 189         ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
 190                                         RX_RING_SIZE *
 191                                         sizeof(struct pas_dma_xct_descr),
 192                                         &ring->dma, GFP_KERNEL);
 193
 194         if (!ring->desc)
 195                 goto out_desc;
 196
 197         memset(ring->desc, 0, RX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
 198
 199         ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev,
 200                                            RX_RING_SIZE * sizeof(u64),
 201                                            &ring->buf_dma, GFP_KERNEL);
 202         if (!ring->buffers)
 203                 goto out_buffers;
 204
 205         memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64));
 206
 207         write_dma_reg(mac, PAS_DMA_RXCHAN_BASEL(chan_id), PAS_DMA_RXCHAN_BASEL_BRBL(ring->dma));
 208
 209         write_dma_reg(mac, PAS_DMA_RXCHAN_BASEU(chan_id),
 210                            PAS_DMA_RXCHAN_BASEU_BRBH(ring->dma >> 32) |
 211                            PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 2));
 212
 213         write_dma_reg(mac, PAS_DMA_RXCHAN_CFG(chan_id),
 214                            PAS_DMA_RXCHAN_CFG_HBU(2));
 215
 216         write_dma_reg(mac, PAS_DMA_RXINT_BASEL(mac->dma_if),
 217                            PAS_DMA_RXINT_BASEL_BRBL(__pa(ring->buffers)));
 218
 219         write_dma_reg(mac, PAS_DMA_RXINT_BASEU(mac->dma_if),
 220                            PAS_DMA_RXINT_BASEU_BRBH(__pa(ring->buffers) >> 32) |
 221                            PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
 222
 223         write_dma_reg(mac, PAS_DMA_RXINT_CFG(mac->dma_if),
 224                            PAS_DMA_RXINT_CFG_DHL(2));
 225
 226         ring->next_to_fill = 0;
 227         ring->next_to_clean = 0;
 228
 229         snprintf(ring->irq_name, sizeof(ring->irq_name),
 230                  "%s rx", dev->name);
 231         mac->rx = ring;
 232
 233         return 0;
 234
 235 out_buffers:
 236         dma_free_coherent(&mac->dma_pdev->dev,
 237                           RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 238                           mac->rx->desc, mac->rx->dma);
 239 out_desc:
 240         kfree(ring->desc_info);
 241 out_desc_info:
 242         kfree(ring);
 243 out_ring:
 244         return -ENOMEM;
 245 }
 246
 247
 248 static int pasemi_mac_setup_tx_resources(struct net_device *dev)
 249 {
 250         struct pasemi_mac *mac = netdev_priv(dev);
 251         u32 val;
 252         int chan_id = mac->dma_txch;
 253         struct pasemi_mac_txring *ring;
 254
 255         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
 256         if (!ring)
 257                 goto out_ring;
 258
 259         spin_lock_init(&ring->lock);
 260
 261         ring->size = TX_RING_SIZE;
 262         ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
 263                                   TX_RING_SIZE, GFP_KERNEL);
 264         if (!ring->desc_info)
 265                 goto out_desc_info;
 266
 267         /* Allocate descriptors */
 268         ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
 269                                         TX_RING_SIZE *
 270                                         sizeof(struct pas_dma_xct_descr),
 271                                         &ring->dma, GFP_KERNEL);
 272         if (!ring->desc)
 273                 goto out_desc;
 274
 275         memset(ring->desc, 0, TX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
 276
 277         write_dma_reg(mac, PAS_DMA_TXCHAN_BASEL(chan_id),
 278                            PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma));
 279         val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32);
 280         val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 2);
 281
 282         write_dma_reg(mac, PAS_DMA_TXCHAN_BASEU(chan_id), val);
 283
 284         write_dma_reg(mac, PAS_DMA_TXCHAN_CFG(chan_id),
 285                            PAS_DMA_TXCHAN_CFG_TY_IFACE |
 286                            PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
 287                            PAS_DMA_TXCHAN_CFG_UP |
 288                            PAS_DMA_TXCHAN_CFG_WT(2));
 289
 290         ring->next_to_fill = 0;
 291         ring->next_to_clean = 0;
 292
 293         snprintf(ring->irq_name, sizeof(ring->irq_name),
 294                  "%s tx", dev->name);
 295         mac->tx = ring;
 296
 297         return 0;
 298
 299 out_desc:
 300         kfree(ring->desc_info);
 301 out_desc_info:
 302         kfree(ring);
 303 out_ring:
 304         return -ENOMEM;
 305 }
 306
 307 static void pasemi_mac_free_tx_resources(struct net_device *dev)
 308 {
 309         struct pasemi_mac *mac = netdev_priv(dev);
 310         unsigned int i;
 311         struct pasemi_mac_buffer *info;
 312         struct pas_dma_xct_descr *dp;
 313
 314         for (i = 0; i < TX_RING_SIZE; i++) {
 315                 info = &TX_DESC_INFO(mac, i);
 316                 dp = &TX_DESC(mac, i);
 317                 if (info->dma) {
 318                         if (info->skb) {
 319                                 pci_unmap_single(mac->dma_pdev,
 320                                                  info->dma,
 321                                                  info->skb->len,
 322                                                  PCI_DMA_TODEVICE);
 323                                 dev_kfree_skb_any(info->skb);
 324                         }
 325                         info->dma = 0;
 326                         info->skb = NULL;
 327                         dp->mactx = 0;
 328                         dp->ptr = 0;
 329                 }
 330         }
 331
 332         dma_free_coherent(&mac->dma_pdev->dev,
 333                           TX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 334                           mac->tx->desc, mac->tx->dma);
 335
 336         kfree(mac->tx->desc_info);
 337         kfree(mac->tx);
 338         mac->tx = NULL;
 339 }
 340
 341 static void pasemi_mac_free_rx_resources(struct net_device *dev)
 342 {
 343         struct pasemi_mac *mac = netdev_priv(dev);
 344         unsigned int i;
 345         struct pasemi_mac_buffer *info;
 346         struct pas_dma_xct_descr *dp;
 347
 348         for (i = 0; i < RX_RING_SIZE; i++) {
 349                 info = &RX_DESC_INFO(mac, i);
 350                 dp = &RX_DESC(mac, i);
 351                 if (info->skb) {
 352                         if (info->dma) {
 353                                 pci_unmap_single(mac->dma_pdev,
 354                                                  info->dma,
 355                                                  info->skb->len,
 356                                                  PCI_DMA_FROMDEVICE);
 357                                 dev_kfree_skb_any(info->skb);
 358                         }
 359                         info->dma = 0;
 360                         info->skb = NULL;
 361                         dp->macrx = 0;
 362                         dp->ptr = 0;
 363                 }
 364         }
 365
 366         dma_free_coherent(&mac->dma_pdev->dev,
 367                           RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 368                           mac->rx->desc, mac->rx->dma);
 369
 370         dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
 371                           mac->rx->buffers, mac->rx->buf_dma);
 372
 373         kfree(mac->rx->desc_info);
 374         kfree(mac->rx);
 375         mac->rx = NULL;
 376 }
 377
 378 static void pasemi_mac_replenish_rx_ring(struct net_device *dev)
 379 {
 380         struct pasemi_mac *mac = netdev_priv(dev);
 381         unsigned int i;
 382         int start = mac->rx->next_to_fill;
 383         unsigned int limit, count;
 384
 385         limit = RING_AVAIL(mac->rx);
 386         /* Check to see if we're doing first-time setup */
 387         if (unlikely(mac->rx->next_to_clean == 0 && mac->rx->next_to_fill == 0))
 388                 limit = RX_RING_SIZE;
 389
 390         if (limit <= 0)
 391                 return;
 392
 393         i = start;
 394         for (count = limit; count; count--) {
 395                 struct pasemi_mac_buffer *info = &RX_DESC_INFO(mac, i);
 396                 u64 *buff = &RX_BUFF(mac, i);
 397                 struct sk_buff *skb;
 398                 dma_addr_t dma;
 399
 400                 /* skb might still be in there for recycle on short receives */
 401                 if (info->skb)
 402                         skb = info->skb;
 403                 else
 404                         skb = dev_alloc_skb(BUF_SIZE);
 405
 406                 if (unlikely(!skb))
 407                         break;
 408
 409                 dma = pci_map_single(mac->dma_pdev, skb->data, skb->len,
 410                                      PCI_DMA_FROMDEVICE);
 411
 412                 if (unlikely(dma_mapping_error(dma))) {
 413                         dev_kfree_skb_irq(info->skb);
 414                         break;
 415                 }
 416
 417                 info->skb = skb;
 418                 info->dma = dma;
 419                 *buff = XCT_RXB_LEN(BUF_SIZE) | XCT_RXB_ADDR(dma);
 420                 i++;
 421         }
 422
 423         wmb();
 424
 425         write_dma_reg(mac, PAS_DMA_RXCHAN_INCR(mac->dma_rxch), limit - count);
 426         write_dma_reg(mac, PAS_DMA_RXINT_INCR(mac->dma_if), limit - count);
 427
 428         mac->rx->next_to_fill += limit - count;
 429 }
 430
 431 static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac)
 432 {
 433         unsigned int reg, pcnt;
 434         /* Re-enable packet count interrupts: finally
 435          * ack the packet count interrupt we got in rx_intr.
 436          */
 437
 438         pcnt = *mac->rx_status & PAS_STATUS_PCNT_M;
 439
 440         reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC;
 441
 442         write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
 443 }
 444
 445 static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
 446 {
 447         unsigned int reg, pcnt;
 448
 449         /* Re-enable packet count interrupts */
 450         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
 451
 452         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
 453
 454         write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
 455 }
 456
 457
 458 static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
 459 {
 460         unsigned int n;
 461         int count;
 462         struct pas_dma_xct_descr *dp;
 463         struct pasemi_mac_buffer *info;
 464         struct sk_buff *skb;
 465         unsigned int i, len;
 466         u64 macrx;
 467         dma_addr_t dma;
 468
 469         spin_lock(&mac->rx->lock);
 470
 471         n = mac->rx->next_to_clean;
 472
 473         for (count = limit; count; count--) {
 474
 475                 rmb();
 476
 477                 dp = &RX_DESC(mac, n);
 478                 prefetchw(dp);
 479                 macrx = dp->macrx;
 480
 481                 if (!(macrx & XCT_MACRX_O))
 482                         break;
 483
 484
 485                 info = NULL;
 486
 487                 /* We have to scan for our skb since there's no way
 488                  * to back-map them from the descriptor, and if we
 489                  * have several receive channels then they might not
 490                  * show up in the same order as they were put on the
 491                  * interface ring.
 492                  */
 493
 494                 dma = (dp->ptr & XCT_PTR_ADDR_M);
 495                 for (i = n; i < (n + RX_RING_SIZE); i++) {
 496                         info = &RX_DESC_INFO(mac, i);
 497                         if (info->dma == dma)
 498                                 break;
 499                 }
 500                 prefetchw(info);
 501
 502                 skb = info->skb;
 503                 prefetchw(skb);
 504                 info->dma = 0;
 505
 506                 pci_unmap_single(mac->dma_pdev, dma, skb->len,
 507                                  PCI_DMA_FROMDEVICE);
 508
 509                 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
 510
 511                 if (len < 256) {
 512                         struct sk_buff *new_skb =
 513                             netdev_alloc_skb(mac->netdev, len + NET_IP_ALIGN);
 514                         if (new_skb) {
 515                                 skb_reserve(new_skb, NET_IP_ALIGN);
 516                                 memcpy(new_skb->data, skb->data, len);
 517                                 /* save the skb in buffer_info as good */
 518                                 skb = new_skb;
 519                         }
 520                         /* else just continue with the old one */
 521                 } else
 522                         info->skb = NULL;
 523
 524                 skb_put(skb, len);
 525
 526                 if (likely((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK)) {
 527                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 528                         skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
 529                                            XCT_MACRX_CSUM_S;
 530                 } else
 531                         skb->ip_summed = CHECKSUM_NONE;
 532
 533                 mac->stats.rx_bytes += len;
 534                 mac->stats.rx_packets++;
 535
 536                 skb->protocol = eth_type_trans(skb, mac->netdev);
 537                 netif_receive_skb(skb);
 538
 539                 dp->ptr = 0;
 540                 dp->macrx = 0;
 541
 542                 n++;
 543         }
 544
 545         mac->rx->next_to_clean += limit - count;
 546         pasemi_mac_replenish_rx_ring(mac->netdev);
 547
 548         spin_unlock(&mac->rx->lock);
 549
 550         return count;
 551 }
 552
 553 static int pasemi_mac_clean_tx(struct pasemi_mac *mac)
 554 {
 555         int i;
 556         struct pasemi_mac_buffer *info;
 557         struct pas_dma_xct_descr *dp;
 558         unsigned int start, count, limit;
 559         unsigned int total_count;
 560         int flags;
 561         struct sk_buff *skbs[32];
 562         dma_addr_t dmas[32];
 563
 564         total_count = 0;
 565 restart:
 566         spin_lock_irqsave(&mac->tx->lock, flags);
 567
 568         start = mac->tx->next_to_clean;
 569         limit = min(mac->tx->next_to_fill, start+32);
 570
 571         count = 0;
 572
 573         for (i = start; i < limit; i++) {
 574                 dp = &TX_DESC(mac, i);
 575
 576                 if (unlikely(dp->mactx & XCT_MACTX_O))
 577                         /* Not yet transmitted */
 578                         break;
 579
 580                 info = &TX_DESC_INFO(mac, i);
 581                 skbs[count] = info->skb;
 582                 dmas[count] = info->dma;
 583
 584                 info->skb = NULL;
 585                 info->dma = 0;
 586                 dp->mactx = 0;
 587                 dp->ptr = 0;
 588
 589                 count++;
 590         }
 591         mac->tx->next_to_clean += count;
 592         spin_unlock_irqrestore(&mac->tx->lock, flags);
 593         netif_wake_queue(mac->netdev);
 594
 595         for (i = 0; i < count; i++) {
 596                 pci_unmap_single(mac->dma_pdev, dmas[i],
 597                                  skbs[i]->len, PCI_DMA_TODEVICE);
 598                 dev_kfree_skb_irq(skbs[i]);
 599         }
 600
 601         total_count += count;
 602
 603         /* If the batch was full, try to clean more */
 604         if (count == 32)
 605                 goto restart;
 606
 607         return total_count;
 608 }
 609
 610
 611 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
 612 {
 613         struct net_device *dev = data;
 614         struct pasemi_mac *mac = netdev_priv(dev);
 615         unsigned int reg;
 616
 617         if (!(*mac->rx_status & PAS_STATUS_CAUSE_M))
 618                 return IRQ_NONE;
 619
 620         if (*mac->rx_status & PAS_STATUS_ERROR)
 621                 printk("rx_status reported error\n");
 622
 623         /* Don't reset packet count so it won't fire again but clear
 624          * all others.
 625          */
 626
 627         reg = 0;
 628         if (*mac->rx_status & PAS_STATUS_SOFT)
 629                 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
 630         if (*mac->rx_status & PAS_STATUS_ERROR)
 631                 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
 632         if (*mac->rx_status & PAS_STATUS_TIMER)
 633                 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
 634
 635         netif_rx_schedule(dev, &mac->napi);
 636
 637         write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
 638
 639         return IRQ_HANDLED;
 640 }
 641
 642 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
 643 {
 644         struct net_device *dev = data;
 645         struct pasemi_mac *mac = netdev_priv(dev);
 646         unsigned int reg, pcnt;
 647
 648         if (!(*mac->tx_status & PAS_STATUS_CAUSE_M))
 649                 return IRQ_NONE;
 650
 651         pasemi_mac_clean_tx(mac);
 652
 653         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
 654
 655         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
 656
 657         if (*mac->tx_status & PAS_STATUS_SOFT)
 658                 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
 659         if (*mac->tx_status & PAS_STATUS_ERROR)
 660                 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
 661
 662         write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
 663
 664         return IRQ_HANDLED;
 665 }
 666
 667 static void pasemi_adjust_link(struct net_device *dev)
 668 {
 669         struct pasemi_mac *mac = netdev_priv(dev);
 670         int msg;
 671         unsigned int flags;
 672         unsigned int new_flags;
 673
 674         if (!mac->phydev->link) {
 675                 /* If no link, MAC speed settings don't matter. Just report
 676                  * link down and return.
 677                  */
 678                 if (mac->link && netif_msg_link(mac))
 679                         printk(KERN_INFO "%s: Link is down.\n", dev->name);
 680
 681                 netif_carrier_off(dev);
 682                 mac->link = 0;
 683
 684                 return;
 685         } else
 686                 netif_carrier_on(dev);
 687
 688         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
 689         new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
 690                               PAS_MAC_CFG_PCFG_TSR_M);
 691
 692         if (!mac->phydev->duplex)
 693                 new_flags |= PAS_MAC_CFG_PCFG_HD;
 694
 695         switch (mac->phydev->speed) {
 696         case 1000:
 697                 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
 698                              PAS_MAC_CFG_PCFG_TSR_1G;
 699                 break;
 700         case 100:
 701                 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
 702                              PAS_MAC_CFG_PCFG_TSR_100M;
 703                 break;
 704         case 10:
 705                 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
 706                              PAS_MAC_CFG_PCFG_TSR_10M;
 707                 break;
 708         default:
 709                 printk("Unsupported speed %d\n", mac->phydev->speed);
 710         }
 711
 712         /* Print on link or speed/duplex change */
 713         msg = mac->link != mac->phydev->link || flags != new_flags;
 714
 715         mac->duplex = mac->phydev->duplex;
 716         mac->speed = mac->phydev->speed;
 717         mac->link = mac->phydev->link;
 718
 719         if (new_flags != flags)
 720                 write_mac_reg(mac, PAS_MAC_CFG_PCFG, new_flags);
 721
 722         if (msg && netif_msg_link(mac))
 723                 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
 724                        dev->name, mac->speed, mac->duplex ? "full" : "half");
 725 }
 726
 727 static int pasemi_mac_phy_init(struct net_device *dev)
 728 {
 729         struct pasemi_mac *mac = netdev_priv(dev);
 730         struct device_node *dn, *phy_dn;
 731         struct phy_device *phydev;
 732         unsigned int phy_id;
 733         const phandle *ph;
 734         const unsigned int *prop;
 735         struct resource r;
 736         int ret;
 737
 738         dn = pci_device_to_OF_node(mac->pdev);
 739         ph = of_get_property(dn, "phy-handle", NULL);
 740         if (!ph)
 741                 return -ENODEV;
 742         phy_dn = of_find_node_by_phandle(*ph);
 743
 744         prop = of_get_property(phy_dn, "reg", NULL);
 745         ret = of_address_to_resource(phy_dn->parent, 0, &r);
 746         if (ret)
 747                 goto err;
 748
 749         phy_id = *prop;
 750         snprintf(mac->phy_id, BUS_ID_SIZE, PHY_ID_FMT, (int)r.start, phy_id);
 751
 752         of_node_put(phy_dn);
 753
 754         mac->link = 0;
 755         mac->speed = 0;
 756         mac->duplex = -1;
 757
 758         phydev = phy_connect(dev, mac->phy_id, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
 759
 760         if (IS_ERR(phydev)) {
 761                 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
 762                 return PTR_ERR(phydev);
 763         }
 764
 765         mac->phydev = phydev;
 766
 767         return 0;
 768
 769 err:
 770         of_node_put(phy_dn);
 771         return -ENODEV;
 772 }
 773
 774
 775 static int pasemi_mac_open(struct net_device *dev)
 776 {
 777         struct pasemi_mac *mac = netdev_priv(dev);
 778         int base_irq;
 779         unsigned int flags;
 780         int ret;
 781
 782         /* enable rx section */
 783         write_dma_reg(mac, PAS_DMA_COM_RXCMD, PAS_DMA_COM_RXCMD_EN);
 784
 785         /* enable tx section */
 786         write_dma_reg(mac, PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN);
 787
 788         flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
 789                 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
 790                 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
 791
 792         write_mac_reg(mac, PAS_MAC_CFG_TXP, flags);
 793
 794         flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
 795                 PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
 796
 797         flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
 798
 799         write_iob_reg(mac, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
 800                            PAS_IOB_DMA_RXCH_CFG_CNTTH(0));
 801
 802         write_iob_reg(mac, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch),
 803                            PAS_IOB_DMA_TXCH_CFG_CNTTH(128));
 804
 805         /* Clear out any residual packet count state from firmware */
 806         pasemi_mac_restart_rx_intr(mac);
 807         pasemi_mac_restart_tx_intr(mac);
 808
 809         /* 0xffffff is max value, about 16ms */
 810         write_iob_reg(mac, PAS_IOB_DMA_COM_TIMEOUTCFG,
 811                            PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
 812
 813         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
 814
 815         ret = pasemi_mac_setup_rx_resources(dev);
 816         if (ret)
 817                 goto out_rx_resources;
 818
 819         ret = pasemi_mac_setup_tx_resources(dev);
 820         if (ret)
 821                 goto out_tx_resources;
 822
 823         write_mac_reg(mac, PAS_MAC_IPC_CHNL,
 824                            PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) |
 825                            PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch));
 826
 827         /* enable rx if */
 828         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
 829                            PAS_DMA_RXINT_RCMDSTA_EN);
 830
 831         /* enable rx channel */
 832         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
 833                            PAS_DMA_RXCHAN_CCMDSTA_EN |
 834                            PAS_DMA_RXCHAN_CCMDSTA_DU);
 835
 836         /* enable tx channel */
 837         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
 838                            PAS_DMA_TXCHAN_TCMDSTA_EN);
 839
 840         pasemi_mac_replenish_rx_ring(dev);
 841
 842         ret = pasemi_mac_phy_init(dev);
 843         /* Some configs don't have PHYs (XAUI etc), so don't complain about
 844          * failed init due to -ENODEV.
 845          */
 846         if (ret && ret != -ENODEV)
 847                 dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
 848
 849         netif_start_queue(dev);
 850         napi_enable(&mac->napi);
 851
 852         /* Interrupts are a bit different for our DMA controller: While
 853          * it's got one a regular PCI device header, the interrupt there
 854          * is really the base of the range it's using. Each tx and rx
 855          * channel has it's own interrupt source.
 856          */
 857
 858         base_irq = virq_to_hw(mac->dma_pdev->irq);
 859
 860         mac->tx_irq = irq_create_mapping(NULL, base_irq + mac->dma_txch);
 861         mac->rx_irq = irq_create_mapping(NULL, base_irq + 20 + mac->dma_txch);
 862
 863         ret = request_irq(mac->tx_irq, &pasemi_mac_tx_intr, IRQF_DISABLED,
 864                           mac->tx->irq_name, dev);
 865         if (ret) {
 866                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 867                         base_irq + mac->dma_txch, ret);
 868                 goto out_tx_int;
 869         }
 870
 871         ret = request_irq(mac->rx_irq, &pasemi_mac_rx_intr, IRQF_DISABLED,
 872                           mac->rx->irq_name, dev);
 873         if (ret) {
 874                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 875                         base_irq + 20 + mac->dma_rxch, ret);
 876                 goto out_rx_int;
 877         }
 878
 879         if (mac->phydev)
 880                 phy_start(mac->phydev);
 881
 882         return 0;
 883
 884 out_rx_int:
 885         free_irq(mac->tx_irq, dev);
 886 out_tx_int:
 887         napi_disable(&mac->napi);
 888         netif_stop_queue(dev);
 889         pasemi_mac_free_tx_resources(dev);
 890 out_tx_resources:
 891         pasemi_mac_free_rx_resources(dev);
 892 out_rx_resources:
 893
 894         return ret;
 895 }
 896
 897 #define MAX_RETRIES 5000
 898
 899 static int pasemi_mac_close(struct net_device *dev)
 900 {
 901         struct pasemi_mac *mac = netdev_priv(dev);
 902         unsigned int stat;
 903         int retries;
 904
 905         if (mac->phydev) {
 906                 phy_stop(mac->phydev);
 907                 phy_disconnect(mac->phydev);
 908         }
 909
 910         netif_stop_queue(dev);
 911         napi_disable(&mac->napi);
 912
 913         /* Clean out any pending buffers */
 914         pasemi_mac_clean_tx(mac);
 915         pasemi_mac_clean_rx(mac, RX_RING_SIZE);
 916
 917         /* Disable interface */
 918         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), PAS_DMA_TXCHAN_TCMDSTA_ST);
 919         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), PAS_DMA_RXINT_RCMDSTA_ST);
 920         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), PAS_DMA_RXCHAN_CCMDSTA_ST);
 921
 922         for (retries = 0; retries < MAX_RETRIES; retries++) {
 923                 stat = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch));
 924                 if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT))
 925                         break;
 926                 cond_resched();
 927         }
 928
 929         if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)
 930                 dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel\n");
 931
 932         for (retries = 0; retries < MAX_RETRIES; retries++) {
 933                 stat = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch));
 934                 if (!(stat & PAS_DMA_RXCHAN_CCMDSTA_ACT))
 935                         break;
 936                 cond_resched();
 937         }
 938
 939         if (stat & PAS_DMA_RXCHAN_CCMDSTA_ACT)
 940                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx channel\n");
 941
 942         for (retries = 0; retries < MAX_RETRIES; retries++) {
 943                 stat = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
 944                 if (!(stat & PAS_DMA_RXINT_RCMDSTA_ACT))
 945                         break;
 946                 cond_resched();
 947         }
 948
 949         if (stat & PAS_DMA_RXINT_RCMDSTA_ACT)
 950                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx interface\n");
 951
 952         /* Then, disable the channel. This must be done separately from
 953          * stopping, since you can't disable when active.
 954          */
 955
 956         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0);
 957         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0);
 958         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
 959
 960         free_irq(mac->tx_irq, dev);
 961         free_irq(mac->rx_irq, dev);
 962
 963         /* Free resources */
 964         pasemi_mac_free_rx_resources(dev);
 965         pasemi_mac_free_tx_resources(dev);
 966
 967         return 0;
 968 }
 969
 970 static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
 971 {
 972         struct pasemi_mac *mac = netdev_priv(dev);
 973         struct pasemi_mac_txring *txring;
 974         struct pasemi_mac_buffer *info;
 975         struct pas_dma_xct_descr *dp;
 976         u64 dflags, mactx, ptr;
 977         dma_addr_t map;
 978         int flags;
 979
 980         dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_SS | XCT_MACTX_CRC_PAD;
 981
 982         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 983                 const unsigned char *nh = skb_network_header(skb);
 984
 985                 switch (ip_hdr(skb)->protocol) {
 986                 case IPPROTO_TCP:
 987                         dflags |= XCT_MACTX_CSUM_TCP;
 988                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
 989                         dflags |= XCT_MACTX_IPO(nh - skb->data);
 990                         break;
 991                 case IPPROTO_UDP:
 992                         dflags |= XCT_MACTX_CSUM_UDP;
 993                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
 994                         dflags |= XCT_MACTX_IPO(nh - skb->data);
 995                         break;
 996                 }
 997         }
 998
 999         map = pci_map_single(mac->dma_pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
1000
1001         if (dma_mapping_error(map))
1002                 return NETDEV_TX_BUSY;
1003
1004         mactx = dflags | XCT_MACTX_LLEN(skb->len);
1005         ptr   = XCT_PTR_LEN(skb->len) | XCT_PTR_ADDR(map);
1006
1007         txring = mac->tx;
1008
1009         spin_lock_irqsave(&txring->lock, flags);
1010
1011         if (RING_AVAIL(txring) <= 1) {
1012                 spin_unlock_irqrestore(&txring->lock, flags);
1013                 pasemi_mac_clean_tx(mac);
1014                 pasemi_mac_restart_tx_intr(mac);
1015                 spin_lock_irqsave(&txring->lock, flags);
1016
1017                 if (RING_AVAIL(txring) <= 1) {
1018                         /* Still no room -- stop the queue and wait for tx
1019                          * intr when there's room.
1020                          */
1021                         netif_stop_queue(dev);
1022                         goto out_err;
1023                 }
1024         }
1025
1026         dp = &TX_DESC(mac, txring->next_to_fill);
1027         info = &TX_DESC_INFO(mac, txring->next_to_fill);
1028
1029         dp->mactx = mactx;
1030         dp->ptr   = ptr;
1031         info->dma = map;
1032         info->skb = skb;
1033
1034         txring->next_to_fill++;
1035         mac->stats.tx_packets++;
1036         mac->stats.tx_bytes += skb->len;
1037
1038         spin_unlock_irqrestore(&txring->lock, flags);
1039
1040         write_dma_reg(mac, PAS_DMA_TXCHAN_INCR(mac->dma_txch), 1);
1041
1042         return NETDEV_TX_OK;
1043
1044 out_err:
1045         spin_unlock_irqrestore(&txring->lock, flags);
1046         pci_unmap_single(mac->dma_pdev, map, skb->len, PCI_DMA_TODEVICE);
1047         return NETDEV_TX_BUSY;
1048 }
1049
1050 static struct net_device_stats *pasemi_mac_get_stats(struct net_device *dev)
1051 {
1052         struct pasemi_mac *mac = netdev_priv(dev);
1053
1054         return &mac->stats;
1055 }
1056
1057
1058 static void pasemi_mac_set_rx_mode(struct net_device *dev)
1059 {
1060         struct pasemi_mac *mac = netdev_priv(dev);
1061         unsigned int flags;
1062
1063         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
1064
1065         /* Set promiscuous */
1066         if (dev->flags & IFF_PROMISC)
1067                 flags |= PAS_MAC_CFG_PCFG_PR;
1068         else
1069                 flags &= ~PAS_MAC_CFG_PCFG_PR;
1070
1071         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
1072 }
1073
1074
1075 static int pasemi_mac_poll(struct napi_struct *napi, int budget)
1076 {
1077         struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi);
1078         struct net_device *dev = mac->netdev;
1079         int pkts;
1080
1081         pasemi_mac_clean_tx(mac);
1082         pkts = pasemi_mac_clean_rx(mac, budget);
1083         if (pkts < budget) {
1084                 /* all done, no more packets present */
1085                 netif_rx_complete(dev, napi);
1086
1087                 pasemi_mac_restart_rx_intr(mac);
1088         }
1089         return pkts;
1090 }
1091
1092 static void __iomem * __devinit map_onedev(struct pci_dev *p, int index)
1093 {
1094         struct device_node *dn;
1095         void __iomem *ret;
1096
1097         dn = pci_device_to_OF_node(p);
1098         if (!dn)
1099                 goto fallback;
1100
1101         ret = of_iomap(dn, index);
1102         if (!ret)
1103                 goto fallback;
1104
1105         return ret;
1106 fallback:
1107         /* This is hardcoded and ugly, but we have some firmware versions
1108          * that don't provide the register space in the device tree. Luckily
1109          * they are at well-known locations so we can just do the math here.
1110          */
1111         return ioremap(0xe0000000 + (p->devfn << 12), 0x2000);
1112 }
1113
1114 static int __devinit pasemi_mac_map_regs(struct pasemi_mac *mac)
1115 {
1116         struct resource res;
1117         struct device_node *dn;
1118         int err;
1119
1120         mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1121         if (!mac->dma_pdev) {
1122                 dev_err(&mac->pdev->dev, "Can't find DMA Controller\n");
1123                 return -ENODEV;
1124         }
1125
1126         mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1127         if (!mac->iob_pdev) {
1128                 dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n");
1129                 return -ENODEV;
1130         }
1131
1132         mac->regs = map_onedev(mac->pdev, 0);
1133         mac->dma_regs = map_onedev(mac->dma_pdev, 0);
1134         mac->iob_regs = map_onedev(mac->iob_pdev, 0);
1135
1136         if (!mac->regs || !mac->dma_regs || !mac->iob_regs) {
1137                 dev_err(&mac->pdev->dev, "Can't map registers\n");
1138                 return -ENODEV;
1139         }
1140
1141         /* The dma status structure is located in the I/O bridge, and
1142          * is cache coherent.
1143          */
1144         if (!dma_status) {
1145                 dn = pci_device_to_OF_node(mac->iob_pdev);
1146                 if (dn)
1147                         err = of_address_to_resource(dn, 1, &res);
1148                 if (!dn || err) {
1149                         /* Fallback for old firmware */
1150                         res.start = 0xfd800000;
1151                         res.end = res.start + 0x1000;
1152                 }
1153                 dma_status = __ioremap(res.start, res.end-res.start, 0);
1154         }
1155
1156         return 0;
1157 }
1158
1159 static int __devinit
1160 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1161 {
1162         static int index = 0;
1163         struct net_device *dev;
1164         struct pasemi_mac *mac;
1165         int err;
1166
1167         err = pci_enable_device(pdev);
1168         if (err)
1169                 return err;
1170
1171         dev = alloc_etherdev(sizeof(struct pasemi_mac));
1172         if (dev == NULL) {
1173                 dev_err(&pdev->dev,
1174                         "pasemi_mac: Could not allocate ethernet device.\n");
1175                 err = -ENOMEM;
1176                 goto out_disable_device;
1177         }
1178
1179         pci_set_drvdata(pdev, dev);
1180         SET_NETDEV_DEV(dev, &pdev->dev);
1181
1182         mac = netdev_priv(dev);
1183
1184         mac->pdev = pdev;
1185         mac->netdev = dev;
1186
1187         netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64);
1188
1189         dev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
1190
1191         /* These should come out of the device tree eventually */
1192         mac->dma_txch = index;
1193         mac->dma_rxch = index;
1194
1195         /* We probe GMAC before XAUI, but the DMA interfaces are
1196          * in XAUI, GMAC order.
1197          */
1198         if (index < 4)
1199                 mac->dma_if = index + 2;
1200         else
1201                 mac->dma_if = index - 4;
1202         index++;
1203
1204         switch (pdev->device) {
1205         case 0xa005:
1206                 mac->type = MAC_TYPE_GMAC;
1207                 break;
1208         case 0xa006:
1209                 mac->type = MAC_TYPE_XAUI;
1210                 break;
1211         default:
1212                 err = -ENODEV;
1213                 goto out;
1214         }
1215
1216         /* get mac addr from device tree */
1217         if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1218                 err = -ENODEV;
1219                 goto out;
1220         }
1221         memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr));
1222
1223         dev->open = pasemi_mac_open;
1224         dev->stop = pasemi_mac_close;
1225         dev->hard_start_xmit = pasemi_mac_start_tx;
1226         dev->get_stats = pasemi_mac_get_stats;
1227         dev->set_multicast_list = pasemi_mac_set_rx_mode;
1228
1229         err = pasemi_mac_map_regs(mac);
1230         if (err)
1231                 goto out;
1232
1233         mac->rx_status = &dma_status->rx_sta[mac->dma_rxch];
1234         mac->tx_status = &dma_status->tx_sta[mac->dma_txch];
1235
1236         mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1237
1238         /* Enable most messages by default */
1239         mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1240
1241         err = register_netdev(dev);
1242
1243         if (err) {
1244                 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1245                         err);
1246                 goto out;
1247         } else
1248                 printk(KERN_INFO "%s: PA Semi %s: intf %d, txch %d, rxch %d, "
1249                        "hw addr %02x:%02x:%02x:%02x:%02x:%02x\n",
1250                        dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
1251                        mac->dma_if, mac->dma_txch, mac->dma_rxch,
1252                        dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
1253                        dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
1254
1255         return err;
1256
1257 out:
1258         if (mac->iob_pdev)
1259                 pci_dev_put(mac->iob_pdev);
1260         if (mac->dma_pdev)
1261                 pci_dev_put(mac->dma_pdev);
1262         if (mac->dma_regs)
1263                 iounmap(mac->dma_regs);
1264         if (mac->iob_regs)
1265                 iounmap(mac->iob_regs);
1266         if (mac->regs)
1267                 iounmap(mac->regs);
1268
1269         free_netdev(dev);
1270 out_disable_device:
1271         pci_disable_device(pdev);
1272         return err;
1273
1274 }
1275
1276 static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
1277 {
1278         struct net_device *netdev = pci_get_drvdata(pdev);
1279         struct pasemi_mac *mac;
1280
1281         if (!netdev)
1282                 return;
1283
1284         mac = netdev_priv(netdev);
1285
1286         unregister_netdev(netdev);
1287
1288         pci_disable_device(pdev);
1289         pci_dev_put(mac->dma_pdev);
1290         pci_dev_put(mac->iob_pdev);
1291
1292         iounmap(mac->regs);
1293         iounmap(mac->dma_regs);
1294         iounmap(mac->iob_regs);
1295
1296         pci_set_drvdata(pdev, NULL);
1297         free_netdev(netdev);
1298 }
1299
1300 static struct pci_device_id pasemi_mac_pci_tbl[] = {
1301         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1302         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
1303         { },
1304 };
1305
1306 MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl);
1307
1308 static struct pci_driver pasemi_mac_driver = {
1309         .name           = "pasemi_mac",
1310         .id_table       = pasemi_mac_pci_tbl,
1311         .probe          = pasemi_mac_probe,
1312         .remove         = __devexit_p(pasemi_mac_remove),
1313 };
1314
1315 static void __exit pasemi_mac_cleanup_module(void)
1316 {
1317         pci_unregister_driver(&pasemi_mac_driver);
1318         __iounmap(dma_status);
1319         dma_status = NULL;
1320 }
1321
1322 int pasemi_mac_init_module(void)
1323 {
1324         return pci_register_driver(&pasemi_mac_driver);
1325 }
1326
1327 module_init(pasemi_mac_init_module);
1328 module_exit(pasemi_mac_cleanup_module);