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 void write_iob_reg(struct pasemi_mac *mac, unsigned int reg,
  89                           unsigned int val)
  90 {
  91         out_le32(mac->iob_regs+reg, val);
  92 }
  93
  94 static unsigned int read_mac_reg(struct pasemi_mac *mac, unsigned int reg)
  95 {
  96         return in_le32(mac->regs+reg);
  97 }
  98
  99 static void write_mac_reg(struct pasemi_mac *mac, unsigned int reg,
 100                           unsigned int val)
 101 {
 102         out_le32(mac->regs+reg, val);
 103 }
 104
 105 static unsigned int read_dma_reg(struct pasemi_mac *mac, unsigned int reg)
 106 {
 107         return in_le32(mac->dma_regs+reg);
 108 }
 109
 110 static void write_dma_reg(struct pasemi_mac *mac, unsigned int reg,
 111                           unsigned int val)
 112 {
 113         out_le32(mac->dma_regs+reg, val);
 114 }
 115
 116 static int pasemi_get_mac_addr(struct pasemi_mac *mac)
 117 {
 118         struct pci_dev *pdev = mac->pdev;
 119         struct device_node *dn = pci_device_to_OF_node(pdev);
 120         int len;
 121         const u8 *maddr;
 122         u8 addr[6];
 123
 124         if (!dn) {
 125                 dev_dbg(&pdev->dev,
 126                           "No device node for mac, not configuring\n");
 127                 return -ENOENT;
 128         }
 129
 130         maddr = of_get_property(dn, "local-mac-address", &len);
 131
 132         if (maddr && len == 6) {
 133                 memcpy(mac->mac_addr, maddr, 6);
 134                 return 0;
 135         }
 136
 137         /* Some old versions of firmware mistakenly uses mac-address
 138          * (and as a string) instead of a byte array in local-mac-address.
 139          */
 140
 141         if (maddr == NULL)
 142                 maddr = of_get_property(dn, "mac-address", NULL);
 143
 144         if (maddr == NULL) {
 145                 dev_warn(&pdev->dev,
 146                          "no mac address in device tree, not configuring\n");
 147                 return -ENOENT;
 148         }
 149
 150
 151         if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0],
 152                    &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) {
 153                 dev_warn(&pdev->dev,
 154                          "can't parse mac address, not configuring\n");
 155                 return -EINVAL;
 156         }
 157
 158         memcpy(mac->mac_addr, addr, 6);
 159
 160         return 0;
 161 }
 162
 163 static int pasemi_mac_setup_rx_resources(struct net_device *dev)
 164 {
 165         struct pasemi_mac_rxring *ring;
 166         struct pasemi_mac *mac = netdev_priv(dev);
 167         int chan_id = mac->dma_rxch;
 168
 169         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
 170
 171         if (!ring)
 172                 goto out_ring;
 173
 174         spin_lock_init(&ring->lock);
 175
 176         ring->size = RX_RING_SIZE;
 177         ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
 178                                   RX_RING_SIZE, GFP_KERNEL);
 179
 180         if (!ring->desc_info)
 181                 goto out_desc_info;
 182
 183         /* Allocate descriptors */
 184         ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
 185                                         RX_RING_SIZE *
 186                                         sizeof(struct pas_dma_xct_descr),
 187                                         &ring->dma, GFP_KERNEL);
 188
 189         if (!ring->desc)
 190                 goto out_desc;
 191
 192         memset(ring->desc, 0, RX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
 193
 194         ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev,
 195                                            RX_RING_SIZE * sizeof(u64),
 196                                            &ring->buf_dma, GFP_KERNEL);
 197         if (!ring->buffers)
 198                 goto out_buffers;
 199
 200         memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64));
 201
 202         write_dma_reg(mac, PAS_DMA_RXCHAN_BASEL(chan_id), PAS_DMA_RXCHAN_BASEL_BRBL(ring->dma));
 203
 204         write_dma_reg(mac, PAS_DMA_RXCHAN_BASEU(chan_id),
 205                            PAS_DMA_RXCHAN_BASEU_BRBH(ring->dma >> 32) |
 206                            PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 2));
 207
 208         write_dma_reg(mac, PAS_DMA_RXCHAN_CFG(chan_id),
 209                            PAS_DMA_RXCHAN_CFG_HBU(2));
 210
 211         write_dma_reg(mac, PAS_DMA_RXINT_BASEL(mac->dma_if),
 212                            PAS_DMA_RXINT_BASEL_BRBL(__pa(ring->buffers)));
 213
 214         write_dma_reg(mac, PAS_DMA_RXINT_BASEU(mac->dma_if),
 215                            PAS_DMA_RXINT_BASEU_BRBH(__pa(ring->buffers) >> 32) |
 216                            PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
 217
 218         write_dma_reg(mac, PAS_DMA_RXINT_CFG(mac->dma_if),
 219                            PAS_DMA_RXINT_CFG_DHL(2));
 220
 221         ring->next_to_fill = 0;
 222         ring->next_to_clean = 0;
 223
 224         snprintf(ring->irq_name, sizeof(ring->irq_name),
 225                  "%s rx", dev->name);
 226         mac->rx = ring;
 227
 228         return 0;
 229
 230 out_buffers:
 231         dma_free_coherent(&mac->dma_pdev->dev,
 232                           RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 233                           mac->rx->desc, mac->rx->dma);
 234 out_desc:
 235         kfree(ring->desc_info);
 236 out_desc_info:
 237         kfree(ring);
 238 out_ring:
 239         return -ENOMEM;
 240 }
 241
 242
 243 static int pasemi_mac_setup_tx_resources(struct net_device *dev)
 244 {
 245         struct pasemi_mac *mac = netdev_priv(dev);
 246         u32 val;
 247         int chan_id = mac->dma_txch;
 248         struct pasemi_mac_txring *ring;
 249
 250         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
 251         if (!ring)
 252                 goto out_ring;
 253
 254         spin_lock_init(&ring->lock);
 255
 256         ring->size = TX_RING_SIZE;
 257         ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
 258                                   TX_RING_SIZE, GFP_KERNEL);
 259         if (!ring->desc_info)
 260                 goto out_desc_info;
 261
 262         /* Allocate descriptors */
 263         ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
 264                                         TX_RING_SIZE *
 265                                         sizeof(struct pas_dma_xct_descr),
 266                                         &ring->dma, GFP_KERNEL);
 267         if (!ring->desc)
 268                 goto out_desc;
 269
 270         memset(ring->desc, 0, TX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
 271
 272         write_dma_reg(mac, PAS_DMA_TXCHAN_BASEL(chan_id),
 273                            PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma));
 274         val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32);
 275         val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 2);
 276
 277         write_dma_reg(mac, PAS_DMA_TXCHAN_BASEU(chan_id), val);
 278
 279         write_dma_reg(mac, PAS_DMA_TXCHAN_CFG(chan_id),
 280                            PAS_DMA_TXCHAN_CFG_TY_IFACE |
 281                            PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
 282                            PAS_DMA_TXCHAN_CFG_UP |
 283                            PAS_DMA_TXCHAN_CFG_WT(2));
 284
 285         ring->next_to_fill = 0;
 286         ring->next_to_clean = 0;
 287
 288         snprintf(ring->irq_name, sizeof(ring->irq_name),
 289                  "%s tx", dev->name);
 290         mac->tx = ring;
 291
 292         return 0;
 293
 294 out_desc:
 295         kfree(ring->desc_info);
 296 out_desc_info:
 297         kfree(ring);
 298 out_ring:
 299         return -ENOMEM;
 300 }
 301
 302 static void pasemi_mac_free_tx_resources(struct net_device *dev)
 303 {
 304         struct pasemi_mac *mac = netdev_priv(dev);
 305         unsigned int i;
 306         struct pasemi_mac_buffer *info;
 307         struct pas_dma_xct_descr *dp;
 308
 309         for (i = 0; i < TX_RING_SIZE; i++) {
 310                 info = &TX_DESC_INFO(mac, i);
 311                 dp = &TX_DESC(mac, i);
 312                 if (info->dma) {
 313                         if (info->skb) {
 314                                 pci_unmap_single(mac->dma_pdev,
 315                                                  info->dma,
 316                                                  info->skb->len,
 317                                                  PCI_DMA_TODEVICE);
 318                                 dev_kfree_skb_any(info->skb);
 319                         }
 320                         info->dma = 0;
 321                         info->skb = NULL;
 322                         dp->mactx = 0;
 323                         dp->ptr = 0;
 324                 }
 325         }
 326
 327         dma_free_coherent(&mac->dma_pdev->dev,
 328                           TX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 329                           mac->tx->desc, mac->tx->dma);
 330
 331         kfree(mac->tx->desc_info);
 332         kfree(mac->tx);
 333         mac->tx = NULL;
 334 }
 335
 336 static void pasemi_mac_free_rx_resources(struct net_device *dev)
 337 {
 338         struct pasemi_mac *mac = netdev_priv(dev);
 339         unsigned int i;
 340         struct pasemi_mac_buffer *info;
 341         struct pas_dma_xct_descr *dp;
 342
 343         for (i = 0; i < RX_RING_SIZE; i++) {
 344                 info = &RX_DESC_INFO(mac, i);
 345                 dp = &RX_DESC(mac, i);
 346                 if (info->skb) {
 347                         if (info->dma) {
 348                                 pci_unmap_single(mac->dma_pdev,
 349                                                  info->dma,
 350                                                  info->skb->len,
 351                                                  PCI_DMA_FROMDEVICE);
 352                                 dev_kfree_skb_any(info->skb);
 353                         }
 354                         info->dma = 0;
 355                         info->skb = NULL;
 356                         dp->macrx = 0;
 357                         dp->ptr = 0;
 358                 }
 359         }
 360
 361         dma_free_coherent(&mac->dma_pdev->dev,
 362                           RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 363                           mac->rx->desc, mac->rx->dma);
 364
 365         dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
 366                           mac->rx->buffers, mac->rx->buf_dma);
 367
 368         kfree(mac->rx->desc_info);
 369         kfree(mac->rx);
 370         mac->rx = NULL;
 371 }
 372
 373 static void pasemi_mac_replenish_rx_ring(struct net_device *dev, int limit)
 374 {
 375         struct pasemi_mac *mac = netdev_priv(dev);
 376         unsigned int i;
 377         int start = mac->rx->next_to_fill;
 378         int count;
 379
 380         if (limit <= 0)
 381                 return;
 382
 383         i = start;
 384         for (count = 0; count < limit; count++) {
 385                 struct pasemi_mac_buffer *info = &RX_DESC_INFO(mac, i);
 386                 u64 *buff = &RX_BUFF(mac, i);
 387                 struct sk_buff *skb;
 388                 dma_addr_t dma;
 389
 390                 /* skb might still be in there for recycle on short receives */
 391                 if (info->skb)
 392                         skb = info->skb;
 393                 else
 394                         skb = dev_alloc_skb(BUF_SIZE);
 395
 396                 if (unlikely(!skb))
 397                         break;
 398
 399                 dma = pci_map_single(mac->dma_pdev, skb->data, skb->len,
 400                                      PCI_DMA_FROMDEVICE);
 401
 402                 if (unlikely(dma_mapping_error(dma))) {
 403                         dev_kfree_skb_irq(info->skb);
 404                         break;
 405                 }
 406
 407                 info->skb = skb;
 408                 info->dma = dma;
 409                 *buff = XCT_RXB_LEN(BUF_SIZE) | XCT_RXB_ADDR(dma);
 410                 i++;
 411         }
 412
 413         wmb();
 414
 415         write_dma_reg(mac, PAS_DMA_RXCHAN_INCR(mac->dma_rxch), count);
 416         write_dma_reg(mac, PAS_DMA_RXINT_INCR(mac->dma_if), count);
 417
 418         mac->rx->next_to_fill += count;
 419 }
 420
 421 static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac)
 422 {
 423         unsigned int reg, pcnt;
 424         /* Re-enable packet count interrupts: finally
 425          * ack the packet count interrupt we got in rx_intr.
 426          */
 427
 428         pcnt = *mac->rx_status & PAS_STATUS_PCNT_M;
 429
 430         reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC;
 431
 432         write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
 433 }
 434
 435 static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
 436 {
 437         unsigned int reg, pcnt;
 438
 439         /* Re-enable packet count interrupts */
 440         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
 441
 442         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
 443
 444         write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
 445 }
 446
 447
 448 static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
 449 {
 450         unsigned int n;
 451         int count;
 452         struct pas_dma_xct_descr *dp;
 453         struct pasemi_mac_buffer *info;
 454         struct sk_buff *skb;
 455         unsigned int i, len;
 456         u64 macrx;
 457         dma_addr_t dma;
 458
 459         spin_lock(&mac->rx->lock);
 460
 461         n = mac->rx->next_to_clean;
 462
 463         for (count = limit; count; count--) {
 464
 465                 rmb();
 466
 467                 dp = &RX_DESC(mac, n);
 468                 prefetchw(dp);
 469                 macrx = dp->macrx;
 470
 471                 if (!(macrx & XCT_MACRX_O))
 472                         break;
 473
 474
 475                 info = NULL;
 476
 477                 /* We have to scan for our skb since there's no way
 478                  * to back-map them from the descriptor, and if we
 479                  * have several receive channels then they might not
 480                  * show up in the same order as they were put on the
 481                  * interface ring.
 482                  */
 483
 484                 dma = (dp->ptr & XCT_PTR_ADDR_M);
 485                 for (i = n; i < (n + RX_RING_SIZE); i++) {
 486                         info = &RX_DESC_INFO(mac, i);
 487                         if (info->dma == dma)
 488                                 break;
 489                 }
 490                 prefetchw(info);
 491
 492                 skb = info->skb;
 493                 prefetchw(skb);
 494                 info->dma = 0;
 495
 496                 pci_unmap_single(mac->dma_pdev, dma, skb->len,
 497                                  PCI_DMA_FROMDEVICE);
 498
 499                 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
 500
 501                 if (len < 256) {
 502                         struct sk_buff *new_skb =
 503                             netdev_alloc_skb(mac->netdev, len + NET_IP_ALIGN);
 504                         if (new_skb) {
 505                                 skb_reserve(new_skb, NET_IP_ALIGN);
 506                                 memcpy(new_skb->data, skb->data, len);
 507                                 /* save the skb in buffer_info as good */
 508                                 skb = new_skb;
 509                         }
 510                         /* else just continue with the old one */
 511                 } else
 512                         info->skb = NULL;
 513
 514                 skb_put(skb, len);
 515
 516                 if (likely((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK)) {
 517                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 518                         skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
 519                                            XCT_MACRX_CSUM_S;
 520                 } else
 521                         skb->ip_summed = CHECKSUM_NONE;
 522
 523                 mac->netdev->stats.rx_bytes += len;
 524                 mac->netdev->stats.rx_packets++;
 525
 526                 skb->protocol = eth_type_trans(skb, mac->netdev);
 527                 netif_receive_skb(skb);
 528
 529                 dp->ptr = 0;
 530                 dp->macrx = 0;
 531
 532                 n++;
 533         }
 534
 535         mac->rx->next_to_clean += limit - count;
 536         pasemi_mac_replenish_rx_ring(mac->netdev, limit-count);
 537
 538         spin_unlock(&mac->rx->lock);
 539
 540         return count;
 541 }
 542
 543 static int pasemi_mac_clean_tx(struct pasemi_mac *mac)
 544 {
 545         int i;
 546         struct pasemi_mac_buffer *info;
 547         struct pas_dma_xct_descr *dp;
 548         unsigned int start, count, limit;
 549         unsigned int total_count;
 550         unsigned long flags;
 551         struct sk_buff *skbs[32];
 552         dma_addr_t dmas[32];
 553
 554         total_count = 0;
 555 restart:
 556         spin_lock_irqsave(&mac->tx->lock, flags);
 557
 558         start = mac->tx->next_to_clean;
 559         limit = min(mac->tx->next_to_fill, start+32);
 560
 561         count = 0;
 562
 563         for (i = start; i < limit; i++) {
 564                 dp = &TX_DESC(mac, i);
 565
 566                 if (unlikely(dp->mactx & XCT_MACTX_O))
 567                         /* Not yet transmitted */
 568                         break;
 569
 570                 info = &TX_DESC_INFO(mac, i);
 571                 skbs[count] = info->skb;
 572                 dmas[count] = info->dma;
 573
 574                 info->skb = NULL;
 575                 info->dma = 0;
 576                 dp->mactx = 0;
 577                 dp->ptr = 0;
 578
 579                 count++;
 580         }
 581         mac->tx->next_to_clean += count;
 582         spin_unlock_irqrestore(&mac->tx->lock, flags);
 583         netif_wake_queue(mac->netdev);
 584
 585         for (i = 0; i < count; i++) {
 586                 pci_unmap_single(mac->dma_pdev, dmas[i],
 587                                  skbs[i]->len, PCI_DMA_TODEVICE);
 588                 dev_kfree_skb_irq(skbs[i]);
 589         }
 590
 591         total_count += count;
 592
 593         /* If the batch was full, try to clean more */
 594         if (count == 32)
 595                 goto restart;
 596
 597         return total_count;
 598 }
 599
 600
 601 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
 602 {
 603         struct net_device *dev = data;
 604         struct pasemi_mac *mac = netdev_priv(dev);
 605         unsigned int reg;
 606
 607         if (!(*mac->rx_status & PAS_STATUS_CAUSE_M))
 608                 return IRQ_NONE;
 609
 610         if (*mac->rx_status & PAS_STATUS_ERROR)
 611                 printk("rx_status reported error\n");
 612
 613         /* Don't reset packet count so it won't fire again but clear
 614          * all others.
 615          */
 616
 617         reg = 0;
 618         if (*mac->rx_status & PAS_STATUS_SOFT)
 619                 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
 620         if (*mac->rx_status & PAS_STATUS_ERROR)
 621                 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
 622         if (*mac->rx_status & PAS_STATUS_TIMER)
 623                 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
 624
 625         netif_rx_schedule(dev, &mac->napi);
 626
 627         write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
 628
 629         return IRQ_HANDLED;
 630 }
 631
 632 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
 633 {
 634         struct net_device *dev = data;
 635         struct pasemi_mac *mac = netdev_priv(dev);
 636         unsigned int reg, pcnt;
 637
 638         if (!(*mac->tx_status & PAS_STATUS_CAUSE_M))
 639                 return IRQ_NONE;
 640
 641         pasemi_mac_clean_tx(mac);
 642
 643         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
 644
 645         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
 646
 647         if (*mac->tx_status & PAS_STATUS_SOFT)
 648                 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
 649         if (*mac->tx_status & PAS_STATUS_ERROR)
 650                 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
 651
 652         write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
 653
 654         return IRQ_HANDLED;
 655 }
 656
 657 static void pasemi_adjust_link(struct net_device *dev)
 658 {
 659         struct pasemi_mac *mac = netdev_priv(dev);
 660         int msg;
 661         unsigned int flags;
 662         unsigned int new_flags;
 663
 664         if (!mac->phydev->link) {
 665                 /* If no link, MAC speed settings don't matter. Just report
 666                  * link down and return.
 667                  */
 668                 if (mac->link && netif_msg_link(mac))
 669                         printk(KERN_INFO "%s: Link is down.\n", dev->name);
 670
 671                 netif_carrier_off(dev);
 672                 mac->link = 0;
 673
 674                 return;
 675         } else
 676                 netif_carrier_on(dev);
 677
 678         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
 679         new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
 680                               PAS_MAC_CFG_PCFG_TSR_M);
 681
 682         if (!mac->phydev->duplex)
 683                 new_flags |= PAS_MAC_CFG_PCFG_HD;
 684
 685         switch (mac->phydev->speed) {
 686         case 1000:
 687                 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
 688                              PAS_MAC_CFG_PCFG_TSR_1G;
 689                 break;
 690         case 100:
 691                 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
 692                              PAS_MAC_CFG_PCFG_TSR_100M;
 693                 break;
 694         case 10:
 695                 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
 696                              PAS_MAC_CFG_PCFG_TSR_10M;
 697                 break;
 698         default:
 699                 printk("Unsupported speed %d\n", mac->phydev->speed);
 700         }
 701
 702         /* Print on link or speed/duplex change */
 703         msg = mac->link != mac->phydev->link || flags != new_flags;
 704
 705         mac->duplex = mac->phydev->duplex;
 706         mac->speed = mac->phydev->speed;
 707         mac->link = mac->phydev->link;
 708
 709         if (new_flags != flags)
 710                 write_mac_reg(mac, PAS_MAC_CFG_PCFG, new_flags);
 711
 712         if (msg && netif_msg_link(mac))
 713                 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
 714                        dev->name, mac->speed, mac->duplex ? "full" : "half");
 715 }
 716
 717 static int pasemi_mac_phy_init(struct net_device *dev)
 718 {
 719         struct pasemi_mac *mac = netdev_priv(dev);
 720         struct device_node *dn, *phy_dn;
 721         struct phy_device *phydev;
 722         unsigned int phy_id;
 723         const phandle *ph;
 724         const unsigned int *prop;
 725         struct resource r;
 726         int ret;
 727
 728         dn = pci_device_to_OF_node(mac->pdev);
 729         ph = of_get_property(dn, "phy-handle", NULL);
 730         if (!ph)
 731                 return -ENODEV;
 732         phy_dn = of_find_node_by_phandle(*ph);
 733
 734         prop = of_get_property(phy_dn, "reg", NULL);
 735         ret = of_address_to_resource(phy_dn->parent, 0, &r);
 736         if (ret)
 737                 goto err;
 738
 739         phy_id = *prop;
 740         snprintf(mac->phy_id, BUS_ID_SIZE, PHY_ID_FMT, (int)r.start, phy_id);
 741
 742         of_node_put(phy_dn);
 743
 744         mac->link = 0;
 745         mac->speed = 0;
 746         mac->duplex = -1;
 747
 748         phydev = phy_connect(dev, mac->phy_id, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
 749
 750         if (IS_ERR(phydev)) {
 751                 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
 752                 return PTR_ERR(phydev);
 753         }
 754
 755         mac->phydev = phydev;
 756
 757         return 0;
 758
 759 err:
 760         of_node_put(phy_dn);
 761         return -ENODEV;
 762 }
 763
 764
 765 static int pasemi_mac_open(struct net_device *dev)
 766 {
 767         struct pasemi_mac *mac = netdev_priv(dev);
 768         int base_irq;
 769         unsigned int flags;
 770         int ret;
 771
 772         /* enable rx section */
 773         write_dma_reg(mac, PAS_DMA_COM_RXCMD, PAS_DMA_COM_RXCMD_EN);
 774
 775         /* enable tx section */
 776         write_dma_reg(mac, PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN);
 777
 778         flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
 779                 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
 780                 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
 781
 782         write_mac_reg(mac, PAS_MAC_CFG_TXP, flags);
 783
 784         write_iob_reg(mac, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
 785                            PAS_IOB_DMA_RXCH_CFG_CNTTH(0));
 786
 787         write_iob_reg(mac, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch),
 788                            PAS_IOB_DMA_TXCH_CFG_CNTTH(128));
 789
 790         /* Clear out any residual packet count state from firmware */
 791         pasemi_mac_restart_rx_intr(mac);
 792         pasemi_mac_restart_tx_intr(mac);
 793
 794         /* 0xffffff is max value, about 16ms */
 795         write_iob_reg(mac, PAS_IOB_DMA_COM_TIMEOUTCFG,
 796                            PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
 797
 798         ret = pasemi_mac_setup_rx_resources(dev);
 799         if (ret)
 800                 goto out_rx_resources;
 801
 802         ret = pasemi_mac_setup_tx_resources(dev);
 803         if (ret)
 804                 goto out_tx_resources;
 805
 806         write_mac_reg(mac, PAS_MAC_IPC_CHNL,
 807                            PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) |
 808                            PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch));
 809
 810         /* enable rx if */
 811         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
 812                            PAS_DMA_RXINT_RCMDSTA_EN);
 813
 814         /* enable rx channel */
 815         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
 816                            PAS_DMA_RXCHAN_CCMDSTA_EN |
 817                            PAS_DMA_RXCHAN_CCMDSTA_DU);
 818
 819         /* enable tx channel */
 820         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
 821                            PAS_DMA_TXCHAN_TCMDSTA_EN);
 822
 823         pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE);
 824
 825         flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
 826                 PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
 827
 828         if (mac->type == MAC_TYPE_GMAC)
 829                 flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
 830         else
 831                 flags |= PAS_MAC_CFG_PCFG_TSR_10G | PAS_MAC_CFG_PCFG_SPD_10G;
 832
 833         /* Enable interface in MAC */
 834         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
 835
 836         ret = pasemi_mac_phy_init(dev);
 837         /* Some configs don't have PHYs (XAUI etc), so don't complain about
 838          * failed init due to -ENODEV.
 839          */
 840         if (ret && ret != -ENODEV)
 841                 dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
 842
 843         netif_start_queue(dev);
 844         napi_enable(&mac->napi);
 845
 846         /* Interrupts are a bit different for our DMA controller: While
 847          * it's got one a regular PCI device header, the interrupt there
 848          * is really the base of the range it's using. Each tx and rx
 849          * channel has it's own interrupt source.
 850          */
 851
 852         base_irq = virq_to_hw(mac->dma_pdev->irq);
 853
 854         mac->tx_irq = irq_create_mapping(NULL, base_irq + mac->dma_txch);
 855         mac->rx_irq = irq_create_mapping(NULL, base_irq + 20 + mac->dma_txch);
 856
 857         ret = request_irq(mac->tx_irq, &pasemi_mac_tx_intr, IRQF_DISABLED,
 858                           mac->tx->irq_name, dev);
 859         if (ret) {
 860                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 861                         base_irq + mac->dma_txch, ret);
 862                 goto out_tx_int;
 863         }
 864
 865         ret = request_irq(mac->rx_irq, &pasemi_mac_rx_intr, IRQF_DISABLED,
 866                           mac->rx->irq_name, dev);
 867         if (ret) {
 868                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 869                         base_irq + 20 + mac->dma_rxch, ret);
 870                 goto out_rx_int;
 871         }
 872
 873         if (mac->phydev)
 874                 phy_start(mac->phydev);
 875
 876         return 0;
 877
 878 out_rx_int:
 879         free_irq(mac->tx_irq, dev);
 880 out_tx_int:
 881         napi_disable(&mac->napi);
 882         netif_stop_queue(dev);
 883         pasemi_mac_free_tx_resources(dev);
 884 out_tx_resources:
 885         pasemi_mac_free_rx_resources(dev);
 886 out_rx_resources:
 887
 888         return ret;
 889 }
 890
 891 #define MAX_RETRIES 5000
 892
 893 static int pasemi_mac_close(struct net_device *dev)
 894 {
 895         struct pasemi_mac *mac = netdev_priv(dev);
 896         unsigned int stat;
 897         int retries;
 898
 899         if (mac->phydev) {
 900                 phy_stop(mac->phydev);
 901                 phy_disconnect(mac->phydev);
 902         }
 903
 904         netif_stop_queue(dev);
 905         napi_disable(&mac->napi);
 906
 907         /* Clean out any pending buffers */
 908         pasemi_mac_clean_tx(mac);
 909         pasemi_mac_clean_rx(mac, RX_RING_SIZE);
 910
 911         /* Disable interface */
 912         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), PAS_DMA_TXCHAN_TCMDSTA_ST);
 913         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), PAS_DMA_RXINT_RCMDSTA_ST);
 914         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), PAS_DMA_RXCHAN_CCMDSTA_ST);
 915
 916         for (retries = 0; retries < MAX_RETRIES; retries++) {
 917                 stat = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch));
 918                 if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT))
 919                         break;
 920                 cond_resched();
 921         }
 922
 923         if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)
 924                 dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel\n");
 925
 926         for (retries = 0; retries < MAX_RETRIES; retries++) {
 927                 stat = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch));
 928                 if (!(stat & PAS_DMA_RXCHAN_CCMDSTA_ACT))
 929                         break;
 930                 cond_resched();
 931         }
 932
 933         if (stat & PAS_DMA_RXCHAN_CCMDSTA_ACT)
 934                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx channel\n");
 935
 936         for (retries = 0; retries < MAX_RETRIES; retries++) {
 937                 stat = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
 938                 if (!(stat & PAS_DMA_RXINT_RCMDSTA_ACT))
 939                         break;
 940                 cond_resched();
 941         }
 942
 943         if (stat & PAS_DMA_RXINT_RCMDSTA_ACT)
 944                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx interface\n");
 945
 946         /* Then, disable the channel. This must be done separately from
 947          * stopping, since you can't disable when active.
 948          */
 949
 950         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0);
 951         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0);
 952         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
 953
 954         free_irq(mac->tx_irq, dev);
 955         free_irq(mac->rx_irq, dev);
 956
 957         /* Free resources */
 958         pasemi_mac_free_rx_resources(dev);
 959         pasemi_mac_free_tx_resources(dev);
 960
 961         return 0;
 962 }
 963
 964 static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
 965 {
 966         struct pasemi_mac *mac = netdev_priv(dev);
 967         struct pasemi_mac_txring *txring;
 968         struct pasemi_mac_buffer *info;
 969         struct pas_dma_xct_descr *dp;
 970         u64 dflags, mactx, ptr;
 971         dma_addr_t map;
 972         unsigned long flags;
 973
 974         dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_SS | XCT_MACTX_CRC_PAD;
 975
 976         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 977                 const unsigned char *nh = skb_network_header(skb);
 978
 979                 switch (ip_hdr(skb)->protocol) {
 980                 case IPPROTO_TCP:
 981                         dflags |= XCT_MACTX_CSUM_TCP;
 982                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
 983                         dflags |= XCT_MACTX_IPO(nh - skb->data);
 984                         break;
 985                 case IPPROTO_UDP:
 986                         dflags |= XCT_MACTX_CSUM_UDP;
 987                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
 988                         dflags |= XCT_MACTX_IPO(nh - skb->data);
 989                         break;
 990                 }
 991         }
 992
 993         map = pci_map_single(mac->dma_pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
 994
 995         if (dma_mapping_error(map))
 996                 return NETDEV_TX_BUSY;
 997
 998         mactx = dflags | XCT_MACTX_LLEN(skb->len);
 999         ptr   = XCT_PTR_LEN(skb->len) | XCT_PTR_ADDR(map);
1000
1001         txring = mac->tx;
1002
1003         spin_lock_irqsave(&txring->lock, flags);
1004
1005         if (RING_AVAIL(txring) <= 1) {
1006                 spin_unlock_irqrestore(&txring->lock, flags);
1007                 pasemi_mac_clean_tx(mac);
1008                 pasemi_mac_restart_tx_intr(mac);
1009                 spin_lock_irqsave(&txring->lock, flags);
1010
1011                 if (RING_AVAIL(txring) <= 1) {
1012                         /* Still no room -- stop the queue and wait for tx
1013                          * intr when there's room.
1014                          */
1015                         netif_stop_queue(dev);
1016                         goto out_err;
1017                 }
1018         }
1019
1020         dp = &TX_DESC(mac, txring->next_to_fill);
1021         info = &TX_DESC_INFO(mac, txring->next_to_fill);
1022
1023         dp->mactx = mactx;
1024         dp->ptr   = ptr;
1025         info->dma = map;
1026         info->skb = skb;
1027
1028         txring->next_to_fill++;
1029         dev->stats.tx_packets++;
1030         dev->stats.tx_bytes += skb->len;
1031
1032         spin_unlock_irqrestore(&txring->lock, flags);
1033
1034         write_dma_reg(mac, PAS_DMA_TXCHAN_INCR(mac->dma_txch), 1);
1035
1036         return NETDEV_TX_OK;
1037
1038 out_err:
1039         spin_unlock_irqrestore(&txring->lock, flags);
1040         pci_unmap_single(mac->dma_pdev, map, skb->len, PCI_DMA_TODEVICE);
1041         return NETDEV_TX_BUSY;
1042 }
1043
1044 static void pasemi_mac_set_rx_mode(struct net_device *dev)
1045 {
1046         struct pasemi_mac *mac = netdev_priv(dev);
1047         unsigned int flags;
1048
1049         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
1050
1051         /* Set promiscuous */
1052         if (dev->flags & IFF_PROMISC)
1053                 flags |= PAS_MAC_CFG_PCFG_PR;
1054         else
1055                 flags &= ~PAS_MAC_CFG_PCFG_PR;
1056
1057         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
1058 }
1059
1060
1061 static int pasemi_mac_poll(struct napi_struct *napi, int budget)
1062 {
1063         struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi);
1064         struct net_device *dev = mac->netdev;
1065         int pkts;
1066
1067         pasemi_mac_clean_tx(mac);
1068         pkts = pasemi_mac_clean_rx(mac, budget);
1069         if (pkts < budget) {
1070                 /* all done, no more packets present */
1071                 netif_rx_complete(dev, napi);
1072
1073                 pasemi_mac_restart_rx_intr(mac);
1074         }
1075         return pkts;
1076 }
1077
1078 static void __iomem * __devinit map_onedev(struct pci_dev *p, int index)
1079 {
1080         struct device_node *dn;
1081         void __iomem *ret;
1082
1083         dn = pci_device_to_OF_node(p);
1084         if (!dn)
1085                 goto fallback;
1086
1087         ret = of_iomap(dn, index);
1088         if (!ret)
1089                 goto fallback;
1090
1091         return ret;
1092 fallback:
1093         /* This is hardcoded and ugly, but we have some firmware versions
1094          * that don't provide the register space in the device tree. Luckily
1095          * they are at well-known locations so we can just do the math here.
1096          */
1097         return ioremap(0xe0000000 + (p->devfn << 12), 0x2000);
1098 }
1099
1100 static int __devinit pasemi_mac_map_regs(struct pasemi_mac *mac)
1101 {
1102         struct resource res;
1103         struct device_node *dn;
1104         int err;
1105
1106         mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1107         if (!mac->dma_pdev) {
1108                 dev_err(&mac->pdev->dev, "Can't find DMA Controller\n");
1109                 return -ENODEV;
1110         }
1111
1112         mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1113         if (!mac->iob_pdev) {
1114                 dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n");
1115                 return -ENODEV;
1116         }
1117
1118         mac->regs = map_onedev(mac->pdev, 0);
1119         mac->dma_regs = map_onedev(mac->dma_pdev, 0);
1120         mac->iob_regs = map_onedev(mac->iob_pdev, 0);
1121
1122         if (!mac->regs || !mac->dma_regs || !mac->iob_regs) {
1123                 dev_err(&mac->pdev->dev, "Can't map registers\n");
1124                 return -ENODEV;
1125         }
1126
1127         /* The dma status structure is located in the I/O bridge, and
1128          * is cache coherent.
1129          */
1130         if (!dma_status) {
1131                 dn = pci_device_to_OF_node(mac->iob_pdev);
1132                 if (dn)
1133                         err = of_address_to_resource(dn, 1, &res);
1134                 if (!dn || err) {
1135                         /* Fallback for old firmware */
1136                         res.start = 0xfd800000;
1137                         res.end = res.start + 0x1000;
1138                 }
1139                 dma_status = __ioremap(res.start, res.end-res.start, 0);
1140         }
1141
1142         return 0;
1143 }
1144
1145 static int __devinit
1146 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1147 {
1148         static int index = 0;
1149         struct net_device *dev;
1150         struct pasemi_mac *mac;
1151         int err;
1152         DECLARE_MAC_BUF(mac_buf);
1153
1154         err = pci_enable_device(pdev);
1155         if (err)
1156                 return err;
1157
1158         dev = alloc_etherdev(sizeof(struct pasemi_mac));
1159         if (dev == NULL) {
1160                 dev_err(&pdev->dev,
1161                         "pasemi_mac: Could not allocate ethernet device.\n");
1162                 err = -ENOMEM;
1163                 goto out_disable_device;
1164         }
1165
1166         pci_set_drvdata(pdev, dev);
1167         SET_NETDEV_DEV(dev, &pdev->dev);
1168
1169         mac = netdev_priv(dev);
1170
1171         mac->pdev = pdev;
1172         mac->netdev = dev;
1173
1174         netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64);
1175
1176         dev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
1177
1178         /* These should come out of the device tree eventually */
1179         mac->dma_txch = index;
1180         mac->dma_rxch = index;
1181
1182         /* We probe GMAC before XAUI, but the DMA interfaces are
1183          * in XAUI, GMAC order.
1184          */
1185         if (index < 4)
1186                 mac->dma_if = index + 2;
1187         else
1188                 mac->dma_if = index - 4;
1189         index++;
1190
1191         switch (pdev->device) {
1192         case 0xa005:
1193                 mac->type = MAC_TYPE_GMAC;
1194                 break;
1195         case 0xa006:
1196                 mac->type = MAC_TYPE_XAUI;
1197                 break;
1198         default:
1199                 err = -ENODEV;
1200                 goto out;
1201         }
1202
1203         /* get mac addr from device tree */
1204         if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1205                 err = -ENODEV;
1206                 goto out;
1207         }
1208         memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr));
1209
1210         dev->open = pasemi_mac_open;
1211         dev->stop = pasemi_mac_close;
1212         dev->hard_start_xmit = pasemi_mac_start_tx;
1213         dev->set_multicast_list = pasemi_mac_set_rx_mode;
1214
1215         err = pasemi_mac_map_regs(mac);
1216         if (err)
1217                 goto out;
1218
1219         mac->rx_status = &dma_status->rx_sta[mac->dma_rxch];
1220         mac->tx_status = &dma_status->tx_sta[mac->dma_txch];
1221
1222         mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1223
1224         /* Enable most messages by default */
1225         mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1226
1227         err = register_netdev(dev);
1228
1229         if (err) {
1230                 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1231                         err);
1232                 goto out;
1233         } else
1234                 printk(KERN_INFO "%s: PA Semi %s: intf %d, txch %d, rxch %d, "
1235                        "hw addr %s\n",
1236                        dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
1237                        mac->dma_if, mac->dma_txch, mac->dma_rxch,
1238                        print_mac(mac_buf, dev->dev_addr));
1239
1240         return err;
1241
1242 out:
1243         if (mac->iob_pdev)
1244                 pci_dev_put(mac->iob_pdev);
1245         if (mac->dma_pdev)
1246                 pci_dev_put(mac->dma_pdev);
1247         if (mac->dma_regs)
1248                 iounmap(mac->dma_regs);
1249         if (mac->iob_regs)
1250                 iounmap(mac->iob_regs);
1251         if (mac->regs)
1252                 iounmap(mac->regs);
1253
1254         free_netdev(dev);
1255 out_disable_device:
1256         pci_disable_device(pdev);
1257         return err;
1258
1259 }
1260
1261 static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
1262 {
1263         struct net_device *netdev = pci_get_drvdata(pdev);
1264         struct pasemi_mac *mac;
1265
1266         if (!netdev)
1267                 return;
1268
1269         mac = netdev_priv(netdev);
1270
1271         unregister_netdev(netdev);
1272
1273         pci_disable_device(pdev);
1274         pci_dev_put(mac->dma_pdev);
1275         pci_dev_put(mac->iob_pdev);
1276
1277         iounmap(mac->regs);
1278         iounmap(mac->dma_regs);
1279         iounmap(mac->iob_regs);
1280
1281         pci_set_drvdata(pdev, NULL);
1282         free_netdev(netdev);
1283 }
1284
1285 static struct pci_device_id pasemi_mac_pci_tbl[] = {
1286         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1287         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
1288         { },
1289 };
1290
1291 MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl);
1292
1293 static struct pci_driver pasemi_mac_driver = {
1294         .name           = "pasemi_mac",
1295         .id_table       = pasemi_mac_pci_tbl,
1296         .probe          = pasemi_mac_probe,
1297         .remove         = __devexit_p(pasemi_mac_remove),
1298 };
1299
1300 static void __exit pasemi_mac_cleanup_module(void)
1301 {
1302         pci_unregister_driver(&pasemi_mac_driver);
1303         __iounmap(dma_status);
1304         dma_status = NULL;
1305 }
1306
1307 int pasemi_mac_init_module(void)
1308 {
1309         return pci_register_driver(&pasemi_mac_driver);
1310 }
1311
1312 module_init(pasemi_mac_init_module);
1313 module_exit(pasemi_mac_cleanup_module);