git.oblomov.eu Git - linux-2.6/blob - drivers/net/pasemi_mac.c

   1 /*
   2  * Copyright (C) 2006-2007 PA Semi, Inc
   3  *
   4  * Driver for the PA Semi PWRficient onchip 1G/10G Ethernet MACs
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  18  */
  19
  20 #include <linux/init.h>
  21 #include <linux/module.h>
  22 #include <linux/pci.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/dmaengine.h>
  25 #include <linux/delay.h>
  26 #include <linux/netdevice.h>
  27 #include <linux/etherdevice.h>
  28 #include <asm/dma-mapping.h>
  29 #include <linux/in.h>
  30 #include <linux/skbuff.h>
  31
  32 #include <linux/ip.h>
  33 #include <linux/tcp.h>
  34 #include <net/checksum.h>
  35
  36 #include <asm/irq.h>
  37
  38 #include "pasemi_mac.h"
  39
  40
  41 /* TODO list
  42  *
  43  * - Get rid of pci_{read,write}_config(), map registers with ioremap
  44  *   for performance
  45  * - PHY support
  46  * - Multicast support
  47  * - Large MTU support
  48  * - Other performance improvements
  49  */
  50
  51
  52 /* Must be a power of two */
  53 #define RX_RING_SIZE 512
  54 #define TX_RING_SIZE 512
  55
  56 #define DEFAULT_MSG_ENABLE        \
  57         (NETIF_MSG_DRV          | \
  58          NETIF_MSG_PROBE        | \
  59          NETIF_MSG_LINK         | \
  60          NETIF_MSG_TIMER        | \
  61          NETIF_MSG_IFDOWN       | \
  62          NETIF_MSG_IFUP         | \
  63          NETIF_MSG_RX_ERR       | \
  64          NETIF_MSG_TX_ERR)
  65
  66 #define TX_DESC(mac, num)       ((mac)->tx->desc[(num) & (TX_RING_SIZE-1)])
  67 #define TX_DESC_INFO(mac, num)  ((mac)->tx->desc_info[(num) & (TX_RING_SIZE-1)])
  68 #define RX_DESC(mac, num)       ((mac)->rx->desc[(num) & (RX_RING_SIZE-1)])
  69 #define RX_DESC_INFO(mac, num)  ((mac)->rx->desc_info[(num) & (RX_RING_SIZE-1)])
  70 #define RX_BUFF(mac, num)       ((mac)->rx->buffers[(num) & (RX_RING_SIZE-1)])
  71
  72 #define BUF_SIZE 1646 /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
  73
  74 MODULE_LICENSE("GPL");
  75 MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
  76 MODULE_DESCRIPTION("PA Semi PWRficient Ethernet driver");
  77
  78 static int debug = -1;  /* -1 == use DEFAULT_MSG_ENABLE as value */
  79 module_param(debug, int, 0);
  80 MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value");
  81
  82 static struct pasdma_status *dma_status;
  83
  84 static unsigned int read_iob_reg(struct pasemi_mac *mac, unsigned int reg)
  85 {
  86         return in_le32(mac->iob_regs+reg);
  87 }
  88
  89 static void write_iob_reg(struct pasemi_mac *mac, unsigned int reg,
  90                           unsigned int val)
  91 {
  92         out_le32(mac->iob_regs+reg, val);
  93 }
  94
  95 static unsigned int read_mac_reg(struct pasemi_mac *mac, unsigned int reg)
  96 {
  97         return in_le32(mac->regs+reg);
  98 }
  99
 100 static void write_mac_reg(struct pasemi_mac *mac, unsigned int reg,
 101                           unsigned int val)
 102 {
 103         out_le32(mac->regs+reg, val);
 104 }
 105
 106 static unsigned int read_dma_reg(struct pasemi_mac *mac, unsigned int reg)
 107 {
 108         return in_le32(mac->dma_regs+reg);
 109 }
 110
 111 static void write_dma_reg(struct pasemi_mac *mac, unsigned int reg,
 112                           unsigned int val)
 113 {
 114         out_le32(mac->dma_regs+reg, val);
 115 }
 116
 117 static int pasemi_get_mac_addr(struct pasemi_mac *mac)
 118 {
 119         struct pci_dev *pdev = mac->pdev;
 120         struct device_node *dn = pci_device_to_OF_node(pdev);
 121         int len;
 122         const u8 *maddr;
 123         u8 addr[6];
 124
 125         if (!dn) {
 126                 dev_dbg(&pdev->dev,
 127                           "No device node for mac, not configuring\n");
 128                 return -ENOENT;
 129         }
 130
 131         maddr = of_get_property(dn, "local-mac-address", &len);
 132
 133         if (maddr && len == 6) {
 134                 memcpy(mac->mac_addr, maddr, 6);
 135                 return 0;
 136         }
 137
 138         /* Some old versions of firmware mistakenly uses mac-address
 139          * (and as a string) instead of a byte array in local-mac-address.
 140          */
 141
 142         if (maddr == NULL)
 143                 maddr = of_get_property(dn, "mac-address", NULL);
 144
 145         if (maddr == NULL) {
 146                 dev_warn(&pdev->dev,
 147                          "no mac address in device tree, not configuring\n");
 148                 return -ENOENT;
 149         }
 150
 151
 152         if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0],
 153                    &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) {
 154                 dev_warn(&pdev->dev,
 155                          "can't parse mac address, not configuring\n");
 156                 return -EINVAL;
 157         }
 158
 159         memcpy(mac->mac_addr, addr, 6);
 160
 161         return 0;
 162 }
 163
 164 static int pasemi_mac_setup_rx_resources(struct net_device *dev)
 165 {
 166         struct pasemi_mac_rxring *ring;
 167         struct pasemi_mac *mac = netdev_priv(dev);
 168         int chan_id = mac->dma_rxch;
 169
 170         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
 171
 172         if (!ring)
 173                 goto out_ring;
 174
 175         spin_lock_init(&ring->lock);
 176
 177         ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
 178                                   RX_RING_SIZE, GFP_KERNEL);
 179
 180         if (!ring->desc_info)
 181                 goto out_desc_info;
 182
 183         /* Allocate descriptors */
 184         ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
 185                                         RX_RING_SIZE *
 186                                         sizeof(struct pas_dma_xct_descr),
 187                                         &ring->dma, GFP_KERNEL);
 188
 189         if (!ring->desc)
 190                 goto out_desc;
 191
 192         memset(ring->desc, 0, RX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
 193
 194         ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev,
 195                                            RX_RING_SIZE * sizeof(u64),
 196                                            &ring->buf_dma, GFP_KERNEL);
 197         if (!ring->buffers)
 198                 goto out_buffers;
 199
 200         memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64));
 201
 202         write_dma_reg(mac, PAS_DMA_RXCHAN_BASEL(chan_id), PAS_DMA_RXCHAN_BASEL_BRBL(ring->dma));
 203
 204         write_dma_reg(mac, PAS_DMA_RXCHAN_BASEU(chan_id),
 205                            PAS_DMA_RXCHAN_BASEU_BRBH(ring->dma >> 32) |
 206                            PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 2));
 207
 208         write_dma_reg(mac, PAS_DMA_RXCHAN_CFG(chan_id),
 209                            PAS_DMA_RXCHAN_CFG_HBU(2));
 210
 211         write_dma_reg(mac, PAS_DMA_RXINT_BASEL(mac->dma_if),
 212                            PAS_DMA_RXINT_BASEL_BRBL(__pa(ring->buffers)));
 213
 214         write_dma_reg(mac, PAS_DMA_RXINT_BASEU(mac->dma_if),
 215                            PAS_DMA_RXINT_BASEU_BRBH(__pa(ring->buffers) >> 32) |
 216                            PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
 217
 218         write_dma_reg(mac, PAS_DMA_RXINT_CFG(mac->dma_if),
 219                            PAS_DMA_RXINT_CFG_DHL(2));
 220
 221         ring->next_to_fill = 0;
 222         ring->next_to_clean = 0;
 223
 224         snprintf(ring->irq_name, sizeof(ring->irq_name),
 225                  "%s rx", dev->name);
 226         mac->rx = ring;
 227
 228         return 0;
 229
 230 out_buffers:
 231         dma_free_coherent(&mac->dma_pdev->dev,
 232                           RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 233                           mac->rx->desc, mac->rx->dma);
 234 out_desc:
 235         kfree(ring->desc_info);
 236 out_desc_info:
 237         kfree(ring);
 238 out_ring:
 239         return -ENOMEM;
 240 }
 241
 242
 243 static int pasemi_mac_setup_tx_resources(struct net_device *dev)
 244 {
 245         struct pasemi_mac *mac = netdev_priv(dev);
 246         u32 val;
 247         int chan_id = mac->dma_txch;
 248         struct pasemi_mac_txring *ring;
 249
 250         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
 251         if (!ring)
 252                 goto out_ring;
 253
 254         spin_lock_init(&ring->lock);
 255
 256         ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
 257                                   TX_RING_SIZE, GFP_KERNEL);
 258         if (!ring->desc_info)
 259                 goto out_desc_info;
 260
 261         /* Allocate descriptors */
 262         ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
 263                                         TX_RING_SIZE *
 264                                         sizeof(struct pas_dma_xct_descr),
 265                                         &ring->dma, GFP_KERNEL);
 266         if (!ring->desc)
 267                 goto out_desc;
 268
 269         memset(ring->desc, 0, TX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
 270
 271         write_dma_reg(mac, PAS_DMA_TXCHAN_BASEL(chan_id),
 272                            PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma));
 273         val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32);
 274         val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 2);
 275
 276         write_dma_reg(mac, PAS_DMA_TXCHAN_BASEU(chan_id), val);
 277
 278         write_dma_reg(mac, PAS_DMA_TXCHAN_CFG(chan_id),
 279                            PAS_DMA_TXCHAN_CFG_TY_IFACE |
 280                            PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
 281                            PAS_DMA_TXCHAN_CFG_UP |
 282                            PAS_DMA_TXCHAN_CFG_WT(2));
 283
 284         ring->next_to_use = 0;
 285         ring->next_to_clean = 0;
 286
 287         snprintf(ring->irq_name, sizeof(ring->irq_name),
 288                  "%s tx", dev->name);
 289         mac->tx = ring;
 290
 291         return 0;
 292
 293 out_desc:
 294         kfree(ring->desc_info);
 295 out_desc_info:
 296         kfree(ring);
 297 out_ring:
 298         return -ENOMEM;
 299 }
 300
 301 static void pasemi_mac_free_tx_resources(struct net_device *dev)
 302 {
 303         struct pasemi_mac *mac = netdev_priv(dev);
 304         unsigned int i;
 305         struct pasemi_mac_buffer *info;
 306         struct pas_dma_xct_descr *dp;
 307
 308         for (i = 0; i < TX_RING_SIZE; i++) {
 309                 info = &TX_DESC_INFO(mac, i);
 310                 dp = &TX_DESC(mac, i);
 311                 if (info->dma) {
 312                         if (info->skb) {
 313                                 pci_unmap_single(mac->dma_pdev,
 314                                                  info->dma,
 315                                                  info->skb->len,
 316                                                  PCI_DMA_TODEVICE);
 317                                 dev_kfree_skb_any(info->skb);
 318                         }
 319                         info->dma = 0;
 320                         info->skb = NULL;
 321                         dp->mactx = 0;
 322                         dp->ptr = 0;
 323                 }
 324         }
 325
 326         dma_free_coherent(&mac->dma_pdev->dev,
 327                           TX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 328                           mac->tx->desc, mac->tx->dma);
 329
 330         kfree(mac->tx->desc_info);
 331         kfree(mac->tx);
 332         mac->tx = NULL;
 333 }
 334
 335 static void pasemi_mac_free_rx_resources(struct net_device *dev)
 336 {
 337         struct pasemi_mac *mac = netdev_priv(dev);
 338         unsigned int i;
 339         struct pasemi_mac_buffer *info;
 340         struct pas_dma_xct_descr *dp;
 341
 342         for (i = 0; i < RX_RING_SIZE; i++) {
 343                 info = &RX_DESC_INFO(mac, i);
 344                 dp = &RX_DESC(mac, i);
 345                 if (info->skb) {
 346                         if (info->dma) {
 347                                 pci_unmap_single(mac->dma_pdev,
 348                                                  info->dma,
 349                                                  info->skb->len,
 350                                                  PCI_DMA_FROMDEVICE);
 351                                 dev_kfree_skb_any(info->skb);
 352                         }
 353                         info->dma = 0;
 354                         info->skb = NULL;
 355                         dp->macrx = 0;
 356                         dp->ptr = 0;
 357                 }
 358         }
 359
 360         dma_free_coherent(&mac->dma_pdev->dev,
 361                           RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 362                           mac->rx->desc, mac->rx->dma);
 363
 364         dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
 365                           mac->rx->buffers, mac->rx->buf_dma);
 366
 367         kfree(mac->rx->desc_info);
 368         kfree(mac->rx);
 369         mac->rx = NULL;
 370 }
 371
 372 static void pasemi_mac_replenish_rx_ring(struct net_device *dev)
 373 {
 374         struct pasemi_mac *mac = netdev_priv(dev);
 375         unsigned int i;
 376         int start = mac->rx->next_to_fill;
 377         unsigned int limit, count;
 378
 379         limit = (mac->rx->next_to_clean + RX_RING_SIZE -
 380                  mac->rx->next_to_fill) & (RX_RING_SIZE - 1);
 381
 382         /* Check to see if we're doing first-time setup */
 383         if (unlikely(mac->rx->next_to_clean == 0 && mac->rx->next_to_fill == 0))
 384                 limit = RX_RING_SIZE;
 385
 386         if (limit <= 0)
 387                 return;
 388
 389         i = start;
 390         for (count = limit; count; count--) {
 391                 struct pasemi_mac_buffer *info = &RX_DESC_INFO(mac, i);
 392                 u64 *buff = &RX_BUFF(mac, i);
 393                 struct sk_buff *skb;
 394                 dma_addr_t dma;
 395
 396                 /* skb might still be in there for recycle on short receives */
 397                 if (info->skb)
 398                         skb = info->skb;
 399                 else
 400                         skb = dev_alloc_skb(BUF_SIZE);
 401
 402                 if (unlikely(!skb))
 403                         break;
 404
 405                 dma = pci_map_single(mac->dma_pdev, skb->data, skb->len,
 406                                      PCI_DMA_FROMDEVICE);
 407
 408                 if (unlikely(dma_mapping_error(dma))) {
 409                         dev_kfree_skb_irq(info->skb);
 410                         break;
 411                 }
 412
 413                 info->skb = skb;
 414                 info->dma = dma;
 415                 *buff = XCT_RXB_LEN(BUF_SIZE) | XCT_RXB_ADDR(dma);
 416                 i++;
 417         }
 418
 419         wmb();
 420
 421         write_dma_reg(mac, PAS_DMA_RXCHAN_INCR(mac->dma_rxch), limit - count);
 422         write_dma_reg(mac, PAS_DMA_RXINT_INCR(mac->dma_if), limit - count);
 423
 424         mac->rx->next_to_fill += limit - count;
 425 }
 426
 427 static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac)
 428 {
 429         unsigned int reg, pcnt;
 430         /* Re-enable packet count interrupts: finally
 431          * ack the packet count interrupt we got in rx_intr.
 432          */
 433
 434         pcnt = *mac->rx_status & PAS_STATUS_PCNT_M;
 435
 436         reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC;
 437
 438         write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
 439 }
 440
 441 static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
 442 {
 443         unsigned int reg, pcnt;
 444
 445         /* Re-enable packet count interrupts */
 446         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
 447
 448         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
 449
 450         write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
 451 }
 452
 453
 454 static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
 455 {
 456         unsigned int n;
 457         int count;
 458         struct pas_dma_xct_descr *dp;
 459         struct pasemi_mac_buffer *info;
 460         struct sk_buff *skb;
 461         unsigned int i, len;
 462         u64 macrx;
 463         dma_addr_t dma;
 464
 465         spin_lock(&mac->rx->lock);
 466
 467         n = mac->rx->next_to_clean;
 468
 469         for (count = limit; count; count--) {
 470
 471                 rmb();
 472
 473                 dp = &RX_DESC(mac, n);
 474                 macrx = dp->macrx;
 475
 476                 if (!(macrx & XCT_MACRX_O))
 477                         break;
 478
 479
 480                 info = NULL;
 481
 482                 /* We have to scan for our skb since there's no way
 483                  * to back-map them from the descriptor, and if we
 484                  * have several receive channels then they might not
 485                  * show up in the same order as they were put on the
 486                  * interface ring.
 487                  */
 488
 489                 dma = (dp->ptr & XCT_PTR_ADDR_M);
 490                 for (i = n; i < (n + RX_RING_SIZE); i++) {
 491                         info = &RX_DESC_INFO(mac, i);
 492                         if (info->dma == dma)
 493                                 break;
 494                 }
 495
 496                 skb = info->skb;
 497                 info->dma = 0;
 498
 499                 pci_unmap_single(mac->dma_pdev, dma, skb->len,
 500                                  PCI_DMA_FROMDEVICE);
 501
 502                 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
 503
 504                 if (len < 256) {
 505                         struct sk_buff *new_skb =
 506                             netdev_alloc_skb(mac->netdev, len + NET_IP_ALIGN);
 507                         if (new_skb) {
 508                                 skb_reserve(new_skb, NET_IP_ALIGN);
 509                                 memcpy(new_skb->data - NET_IP_ALIGN,
 510                                         skb->data - NET_IP_ALIGN,
 511                                         len + NET_IP_ALIGN);
 512                                 /* save the skb in buffer_info as good */
 513                                 skb = new_skb;
 514                         }
 515                         /* else just continue with the old one */
 516                 } else
 517                         info->skb = NULL;
 518
 519                 skb_put(skb, len);
 520
 521                 skb->protocol = eth_type_trans(skb, mac->netdev);
 522
 523                 if ((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK) {
 524                         skb->ip_summed = CHECKSUM_COMPLETE;
 525                         skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
 526                                            XCT_MACRX_CSUM_S;
 527                 } else
 528                         skb->ip_summed = CHECKSUM_NONE;
 529
 530                 mac->stats.rx_bytes += len;
 531                 mac->stats.rx_packets++;
 532
 533                 netif_receive_skb(skb);
 534
 535                 dp->ptr = 0;
 536                 dp->macrx = 0;
 537
 538                 n++;
 539         }
 540
 541         mac->rx->next_to_clean += limit - count;
 542         pasemi_mac_replenish_rx_ring(mac->netdev);
 543
 544         spin_unlock(&mac->rx->lock);
 545
 546         return count;
 547 }
 548
 549 static int pasemi_mac_clean_tx(struct pasemi_mac *mac)
 550 {
 551         int i;
 552         struct pasemi_mac_buffer *info;
 553         struct pas_dma_xct_descr *dp;
 554         int start, count;
 555         int flags;
 556
 557         spin_lock_irqsave(&mac->tx->lock, flags);
 558
 559         start = mac->tx->next_to_clean;
 560         count = 0;
 561
 562         for (i = start; i < mac->tx->next_to_use; i++) {
 563                 dp = &TX_DESC(mac, i);
 564                 if (!dp || (dp->mactx & XCT_MACTX_O))
 565                         break;
 566
 567                 count++;
 568
 569                 info = &TX_DESC_INFO(mac, i);
 570
 571                 pci_unmap_single(mac->dma_pdev, info->dma,
 572                                  info->skb->len, PCI_DMA_TODEVICE);
 573                 dev_kfree_skb_irq(info->skb);
 574
 575                 info->skb = NULL;
 576                 info->dma = 0;
 577                 dp->mactx = 0;
 578                 dp->ptr = 0;
 579         }
 580         mac->tx->next_to_clean += count;
 581         spin_unlock_irqrestore(&mac->tx->lock, flags);
 582         netif_wake_queue(mac->netdev);
 583
 584         return count;
 585 }
 586
 587
 588 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
 589 {
 590         struct net_device *dev = data;
 591         struct pasemi_mac *mac = netdev_priv(dev);
 592         unsigned int reg;
 593
 594         if (!(*mac->rx_status & PAS_STATUS_CAUSE_M))
 595                 return IRQ_NONE;
 596
 597         if (*mac->rx_status & PAS_STATUS_ERROR)
 598                 printk("rx_status reported error\n");
 599
 600         /* Don't reset packet count so it won't fire again but clear
 601          * all others.
 602          */
 603
 604         reg = 0;
 605         if (*mac->rx_status & PAS_STATUS_SOFT)
 606                 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
 607         if (*mac->rx_status & PAS_STATUS_ERROR)
 608                 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
 609         if (*mac->rx_status & PAS_STATUS_TIMER)
 610                 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
 611
 612         netif_rx_schedule(dev, &mac->napi);
 613
 614         write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
 615
 616         return IRQ_HANDLED;
 617 }
 618
 619 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
 620 {
 621         struct net_device *dev = data;
 622         struct pasemi_mac *mac = netdev_priv(dev);
 623         unsigned int reg, pcnt;
 624
 625         if (!(*mac->tx_status & PAS_STATUS_CAUSE_M))
 626                 return IRQ_NONE;
 627
 628         pasemi_mac_clean_tx(mac);
 629
 630         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
 631
 632         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
 633
 634         if (*mac->tx_status & PAS_STATUS_SOFT)
 635                 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
 636         if (*mac->tx_status & PAS_STATUS_ERROR)
 637                 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
 638
 639         write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
 640
 641         return IRQ_HANDLED;
 642 }
 643
 644 static void pasemi_adjust_link(struct net_device *dev)
 645 {
 646         struct pasemi_mac *mac = netdev_priv(dev);
 647         int msg;
 648         unsigned int flags;
 649         unsigned int new_flags;
 650
 651         if (!mac->phydev->link) {
 652                 /* If no link, MAC speed settings don't matter. Just report
 653                  * link down and return.
 654                  */
 655                 if (mac->link && netif_msg_link(mac))
 656                         printk(KERN_INFO "%s: Link is down.\n", dev->name);
 657
 658                 netif_carrier_off(dev);
 659                 mac->link = 0;
 660
 661                 return;
 662         } else
 663                 netif_carrier_on(dev);
 664
 665         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
 666         new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
 667                               PAS_MAC_CFG_PCFG_TSR_M);
 668
 669         if (!mac->phydev->duplex)
 670                 new_flags |= PAS_MAC_CFG_PCFG_HD;
 671
 672         switch (mac->phydev->speed) {
 673         case 1000:
 674                 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
 675                              PAS_MAC_CFG_PCFG_TSR_1G;
 676                 break;
 677         case 100:
 678                 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
 679                              PAS_MAC_CFG_PCFG_TSR_100M;
 680                 break;
 681         case 10:
 682                 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
 683                              PAS_MAC_CFG_PCFG_TSR_10M;
 684                 break;
 685         default:
 686                 printk("Unsupported speed %d\n", mac->phydev->speed);
 687         }
 688
 689         /* Print on link or speed/duplex change */
 690         msg = mac->link != mac->phydev->link || flags != new_flags;
 691
 692         mac->duplex = mac->phydev->duplex;
 693         mac->speed = mac->phydev->speed;
 694         mac->link = mac->phydev->link;
 695
 696         if (new_flags != flags)
 697                 write_mac_reg(mac, PAS_MAC_CFG_PCFG, new_flags);
 698
 699         if (msg && netif_msg_link(mac))
 700                 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
 701                        dev->name, mac->speed, mac->duplex ? "full" : "half");
 702 }
 703
 704 static int pasemi_mac_phy_init(struct net_device *dev)
 705 {
 706         struct pasemi_mac *mac = netdev_priv(dev);
 707         struct device_node *dn, *phy_dn;
 708         struct phy_device *phydev;
 709         unsigned int phy_id;
 710         const phandle *ph;
 711         const unsigned int *prop;
 712         struct resource r;
 713         int ret;
 714
 715         dn = pci_device_to_OF_node(mac->pdev);
 716         ph = of_get_property(dn, "phy-handle", NULL);
 717         if (!ph)
 718                 return -ENODEV;
 719         phy_dn = of_find_node_by_phandle(*ph);
 720
 721         prop = of_get_property(phy_dn, "reg", NULL);
 722         ret = of_address_to_resource(phy_dn->parent, 0, &r);
 723         if (ret)
 724                 goto err;
 725
 726         phy_id = *prop;
 727         snprintf(mac->phy_id, BUS_ID_SIZE, PHY_ID_FMT, (int)r.start, phy_id);
 728
 729         of_node_put(phy_dn);
 730
 731         mac->link = 0;
 732         mac->speed = 0;
 733         mac->duplex = -1;
 734
 735         phydev = phy_connect(dev, mac->phy_id, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
 736
 737         if (IS_ERR(phydev)) {
 738                 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
 739                 return PTR_ERR(phydev);
 740         }
 741
 742         mac->phydev = phydev;
 743
 744         return 0;
 745
 746 err:
 747         of_node_put(phy_dn);
 748         return -ENODEV;
 749 }
 750
 751
 752 static int pasemi_mac_open(struct net_device *dev)
 753 {
 754         struct pasemi_mac *mac = netdev_priv(dev);
 755         int base_irq;
 756         unsigned int flags;
 757         int ret;
 758
 759         /* enable rx section */
 760         write_dma_reg(mac, PAS_DMA_COM_RXCMD, PAS_DMA_COM_RXCMD_EN);
 761
 762         /* enable tx section */
 763         write_dma_reg(mac, PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN);
 764
 765         flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
 766                 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
 767                 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
 768
 769         write_mac_reg(mac, PAS_MAC_CFG_TXP, flags);
 770
 771         flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
 772                 PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
 773
 774         flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
 775
 776         write_iob_reg(mac, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
 777                            PAS_IOB_DMA_RXCH_CFG_CNTTH(0));
 778
 779         write_iob_reg(mac, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch),
 780                            PAS_IOB_DMA_TXCH_CFG_CNTTH(32));
 781
 782         /* Clear out any residual packet count state from firmware */
 783         pasemi_mac_restart_rx_intr(mac);
 784         pasemi_mac_restart_tx_intr(mac);
 785
 786         /* 0xffffff is max value, about 16ms */
 787         write_iob_reg(mac, PAS_IOB_DMA_COM_TIMEOUTCFG,
 788                            PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
 789
 790         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
 791
 792         ret = pasemi_mac_setup_rx_resources(dev);
 793         if (ret)
 794                 goto out_rx_resources;
 795
 796         ret = pasemi_mac_setup_tx_resources(dev);
 797         if (ret)
 798                 goto out_tx_resources;
 799
 800         write_mac_reg(mac, PAS_MAC_IPC_CHNL,
 801                            PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) |
 802                            PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch));
 803
 804         /* enable rx if */
 805         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
 806                            PAS_DMA_RXINT_RCMDSTA_EN);
 807
 808         /* enable rx channel */
 809         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
 810                            PAS_DMA_RXCHAN_CCMDSTA_EN |
 811                            PAS_DMA_RXCHAN_CCMDSTA_DU);
 812
 813         /* enable tx channel */
 814         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
 815                            PAS_DMA_TXCHAN_TCMDSTA_EN);
 816
 817         pasemi_mac_replenish_rx_ring(dev);
 818
 819         ret = pasemi_mac_phy_init(dev);
 820         /* Some configs don't have PHYs (XAUI etc), so don't complain about
 821          * failed init due to -ENODEV.
 822          */
 823         if (ret && ret != -ENODEV)
 824                 dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
 825
 826         netif_start_queue(dev);
 827         napi_enable(&mac->napi);
 828
 829         /* Interrupts are a bit different for our DMA controller: While
 830          * it's got one a regular PCI device header, the interrupt there
 831          * is really the base of the range it's using. Each tx and rx
 832          * channel has it's own interrupt source.
 833          */
 834
 835         base_irq = virq_to_hw(mac->dma_pdev->irq);
 836
 837         mac->tx_irq = irq_create_mapping(NULL, base_irq + mac->dma_txch);
 838         mac->rx_irq = irq_create_mapping(NULL, base_irq + 20 + mac->dma_txch);
 839
 840         ret = request_irq(mac->tx_irq, &pasemi_mac_tx_intr, IRQF_DISABLED,
 841                           mac->tx->irq_name, dev);
 842         if (ret) {
 843                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 844                         base_irq + mac->dma_txch, ret);
 845                 goto out_tx_int;
 846         }
 847
 848         ret = request_irq(mac->rx_irq, &pasemi_mac_rx_intr, IRQF_DISABLED,
 849                           mac->rx->irq_name, dev);
 850         if (ret) {
 851                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 852                         base_irq + 20 + mac->dma_rxch, ret);
 853                 goto out_rx_int;
 854         }
 855
 856         if (mac->phydev)
 857                 phy_start(mac->phydev);
 858
 859         return 0;
 860
 861 out_rx_int:
 862         free_irq(mac->tx_irq, dev);
 863 out_tx_int:
 864         napi_disable(&mac->napi);
 865         netif_stop_queue(dev);
 866         pasemi_mac_free_tx_resources(dev);
 867 out_tx_resources:
 868         pasemi_mac_free_rx_resources(dev);
 869 out_rx_resources:
 870
 871         return ret;
 872 }
 873
 874 #define MAX_RETRIES 5000
 875
 876 static int pasemi_mac_close(struct net_device *dev)
 877 {
 878         struct pasemi_mac *mac = netdev_priv(dev);
 879         unsigned int stat;
 880         int retries;
 881
 882         if (mac->phydev) {
 883                 phy_stop(mac->phydev);
 884                 phy_disconnect(mac->phydev);
 885         }
 886
 887         netif_stop_queue(dev);
 888         napi_disable(&mac->napi);
 889
 890         /* Clean out any pending buffers */
 891         pasemi_mac_clean_tx(mac);
 892         pasemi_mac_clean_rx(mac, RX_RING_SIZE);
 893
 894         /* Disable interface */
 895         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), PAS_DMA_TXCHAN_TCMDSTA_ST);
 896         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), PAS_DMA_RXINT_RCMDSTA_ST);
 897         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), PAS_DMA_RXCHAN_CCMDSTA_ST);
 898
 899         for (retries = 0; retries < MAX_RETRIES; retries++) {
 900                 stat = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch));
 901                 if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT))
 902                         break;
 903                 cond_resched();
 904         }
 905
 906         if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)
 907                 dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel\n");
 908
 909         for (retries = 0; retries < MAX_RETRIES; retries++) {
 910                 stat = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch));
 911                 if (!(stat & PAS_DMA_RXCHAN_CCMDSTA_ACT))
 912                         break;
 913                 cond_resched();
 914         }
 915
 916         if (stat & PAS_DMA_RXCHAN_CCMDSTA_ACT)
 917                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx channel\n");
 918
 919         for (retries = 0; retries < MAX_RETRIES; retries++) {
 920                 stat = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
 921                 if (!(stat & PAS_DMA_RXINT_RCMDSTA_ACT))
 922                         break;
 923                 cond_resched();
 924         }
 925
 926         if (stat & PAS_DMA_RXINT_RCMDSTA_ACT)
 927                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx interface\n");
 928
 929         /* Then, disable the channel. This must be done separately from
 930          * stopping, since you can't disable when active.
 931          */
 932
 933         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0);
 934         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0);
 935         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
 936
 937         free_irq(mac->tx_irq, dev);
 938         free_irq(mac->rx_irq, dev);
 939
 940         /* Free resources */
 941         pasemi_mac_free_rx_resources(dev);
 942         pasemi_mac_free_tx_resources(dev);
 943
 944         return 0;
 945 }
 946
 947 static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
 948 {
 949         struct pasemi_mac *mac = netdev_priv(dev);
 950         struct pasemi_mac_txring *txring;
 951         struct pasemi_mac_buffer *info;
 952         struct pas_dma_xct_descr *dp;
 953         u64 dflags;
 954         dma_addr_t map;
 955         int flags;
 956
 957         dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_SS | XCT_MACTX_CRC_PAD;
 958
 959         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 960                 const unsigned char *nh = skb_network_header(skb);
 961
 962                 switch (ip_hdr(skb)->protocol) {
 963                 case IPPROTO_TCP:
 964                         dflags |= XCT_MACTX_CSUM_TCP;
 965                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
 966                         dflags |= XCT_MACTX_IPO(nh - skb->data);
 967                         break;
 968                 case IPPROTO_UDP:
 969                         dflags |= XCT_MACTX_CSUM_UDP;
 970                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
 971                         dflags |= XCT_MACTX_IPO(nh - skb->data);
 972                         break;
 973                 }
 974         }
 975
 976         map = pci_map_single(mac->dma_pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
 977
 978         if (dma_mapping_error(map))
 979                 return NETDEV_TX_BUSY;
 980
 981         txring = mac->tx;
 982
 983         spin_lock_irqsave(&txring->lock, flags);
 984
 985         if (txring->next_to_clean - txring->next_to_use == TX_RING_SIZE) {
 986                 spin_unlock_irqrestore(&txring->lock, flags);
 987                 pasemi_mac_clean_tx(mac);
 988                 pasemi_mac_restart_tx_intr(mac);
 989                 spin_lock_irqsave(&txring->lock, flags);
 990
 991                 if (txring->next_to_clean - txring->next_to_use ==
 992                     TX_RING_SIZE) {
 993                         /* Still no room -- stop the queue and wait for tx
 994                          * intr when there's room.
 995                          */
 996                         netif_stop_queue(dev);
 997                         goto out_err;
 998                 }
 999         }
1000
1001
1002         dp = &TX_DESC(mac, txring->next_to_use);
1003         info = &TX_DESC_INFO(mac, txring->next_to_use);
1004
1005         dp->mactx = dflags | XCT_MACTX_LLEN(skb->len);
1006         dp->ptr   = XCT_PTR_LEN(skb->len) | XCT_PTR_ADDR(map);
1007         info->dma = map;
1008         info->skb = skb;
1009
1010         txring->next_to_use++;
1011         mac->stats.tx_packets++;
1012         mac->stats.tx_bytes += skb->len;
1013
1014         spin_unlock_irqrestore(&txring->lock, flags);
1015
1016         write_dma_reg(mac, PAS_DMA_TXCHAN_INCR(mac->dma_txch), 1);
1017
1018         return NETDEV_TX_OK;
1019
1020 out_err:
1021         spin_unlock_irqrestore(&txring->lock, flags);
1022         pci_unmap_single(mac->dma_pdev, map, skb->len, PCI_DMA_TODEVICE);
1023         return NETDEV_TX_BUSY;
1024 }
1025
1026 static struct net_device_stats *pasemi_mac_get_stats(struct net_device *dev)
1027 {
1028         struct pasemi_mac *mac = netdev_priv(dev);
1029
1030         return &mac->stats;
1031 }
1032
1033
1034 static void pasemi_mac_set_rx_mode(struct net_device *dev)
1035 {
1036         struct pasemi_mac *mac = netdev_priv(dev);
1037         unsigned int flags;
1038
1039         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
1040
1041         /* Set promiscuous */
1042         if (dev->flags & IFF_PROMISC)
1043                 flags |= PAS_MAC_CFG_PCFG_PR;
1044         else
1045                 flags &= ~PAS_MAC_CFG_PCFG_PR;
1046
1047         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
1048 }
1049
1050
1051 static int pasemi_mac_poll(struct napi_struct *napi, int budget)
1052 {
1053         struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi);
1054         struct net_device *dev = mac->netdev;
1055         int pkts;
1056
1057         pkts = pasemi_mac_clean_rx(mac, budget);
1058         if (pkts < budget) {
1059                 /* all done, no more packets present */
1060                 netif_rx_complete(dev, napi);
1061
1062                 pasemi_mac_restart_rx_intr(mac);
1063         }
1064         return pkts;
1065 }
1066
1067 static void __iomem * __devinit map_onedev(struct pci_dev *p, int index)
1068 {
1069         struct device_node *dn;
1070         void __iomem *ret;
1071
1072         dn = pci_device_to_OF_node(p);
1073         if (!dn)
1074                 goto fallback;
1075
1076         ret = of_iomap(dn, index);
1077         if (!ret)
1078                 goto fallback;
1079
1080         return ret;
1081 fallback:
1082         /* This is hardcoded and ugly, but we have some firmware versions
1083          * that don't provide the register space in the device tree. Luckily
1084          * they are at well-known locations so we can just do the math here.
1085          */
1086         return ioremap(0xe0000000 + (p->devfn << 12), 0x2000);
1087 }
1088
1089 static int __devinit pasemi_mac_map_regs(struct pasemi_mac *mac)
1090 {
1091         struct resource res;
1092         struct device_node *dn;
1093         int err;
1094
1095         mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1096         if (!mac->dma_pdev) {
1097                 dev_err(&mac->pdev->dev, "Can't find DMA Controller\n");
1098                 return -ENODEV;
1099         }
1100
1101         mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1102         if (!mac->iob_pdev) {
1103                 dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n");
1104                 return -ENODEV;
1105         }
1106
1107         mac->regs = map_onedev(mac->pdev, 0);
1108         mac->dma_regs = map_onedev(mac->dma_pdev, 0);
1109         mac->iob_regs = map_onedev(mac->iob_pdev, 0);
1110
1111         if (!mac->regs || !mac->dma_regs || !mac->iob_regs) {
1112                 dev_err(&mac->pdev->dev, "Can't map registers\n");
1113                 return -ENODEV;
1114         }
1115
1116         /* The dma status structure is located in the I/O bridge, and
1117          * is cache coherent.
1118          */
1119         if (!dma_status) {
1120                 dn = pci_device_to_OF_node(mac->iob_pdev);
1121                 if (dn)
1122                         err = of_address_to_resource(dn, 1, &res);
1123                 if (!dn || err) {
1124                         /* Fallback for old firmware */
1125                         res.start = 0xfd800000;
1126                         res.end = res.start + 0x1000;
1127                 }
1128                 dma_status = __ioremap(res.start, res.end-res.start, 0);
1129         }
1130
1131         return 0;
1132 }
1133
1134 static int __devinit
1135 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1136 {
1137         static int index = 0;
1138         struct net_device *dev;
1139         struct pasemi_mac *mac;
1140         int err;
1141
1142         err = pci_enable_device(pdev);
1143         if (err)
1144                 return err;
1145
1146         dev = alloc_etherdev(sizeof(struct pasemi_mac));
1147         if (dev == NULL) {
1148                 dev_err(&pdev->dev,
1149                         "pasemi_mac: Could not allocate ethernet device.\n");
1150                 err = -ENOMEM;
1151                 goto out_disable_device;
1152         }
1153
1154         SET_MODULE_OWNER(dev);
1155         pci_set_drvdata(pdev, dev);
1156         SET_NETDEV_DEV(dev, &pdev->dev);
1157
1158         mac = netdev_priv(dev);
1159
1160         mac->pdev = pdev;
1161         mac->netdev = dev;
1162
1163         netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64);
1164
1165         dev->features = NETIF_F_HW_CSUM;
1166
1167         /* These should come out of the device tree eventually */
1168         mac->dma_txch = index;
1169         mac->dma_rxch = index;
1170
1171         /* We probe GMAC before XAUI, but the DMA interfaces are
1172          * in XAUI, GMAC order.
1173          */
1174         if (index < 4)
1175                 mac->dma_if = index + 2;
1176         else
1177                 mac->dma_if = index - 4;
1178         index++;
1179
1180         switch (pdev->device) {
1181         case 0xa005:
1182                 mac->type = MAC_TYPE_GMAC;
1183                 break;
1184         case 0xa006:
1185                 mac->type = MAC_TYPE_XAUI;
1186                 break;
1187         default:
1188                 err = -ENODEV;
1189                 goto out;
1190         }
1191
1192         /* get mac addr from device tree */
1193         if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1194                 err = -ENODEV;
1195                 goto out;
1196         }
1197         memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr));
1198
1199         dev->open = pasemi_mac_open;
1200         dev->stop = pasemi_mac_close;
1201         dev->hard_start_xmit = pasemi_mac_start_tx;
1202         dev->get_stats = pasemi_mac_get_stats;
1203         dev->set_multicast_list = pasemi_mac_set_rx_mode;
1204
1205         err = pasemi_mac_map_regs(mac);
1206         if (err)
1207                 goto out;
1208
1209         mac->rx_status = &dma_status->rx_sta[mac->dma_rxch];
1210         mac->tx_status = &dma_status->tx_sta[mac->dma_txch];
1211
1212         mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1213
1214         /* Enable most messages by default */
1215         mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1216
1217         err = register_netdev(dev);
1218
1219         if (err) {
1220                 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1221                         err);
1222                 goto out;
1223         } else
1224                 printk(KERN_INFO "%s: PA Semi %s: intf %d, txch %d, rxch %d, "
1225                        "hw addr %02x:%02x:%02x:%02x:%02x:%02x\n",
1226                        dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
1227                        mac->dma_if, mac->dma_txch, mac->dma_rxch,
1228                        dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
1229                        dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
1230
1231         return err;
1232
1233 out:
1234         if (mac->iob_pdev)
1235                 pci_dev_put(mac->iob_pdev);
1236         if (mac->dma_pdev)
1237                 pci_dev_put(mac->dma_pdev);
1238         if (mac->dma_regs)
1239                 iounmap(mac->dma_regs);
1240         if (mac->iob_regs)
1241                 iounmap(mac->iob_regs);
1242         if (mac->regs)
1243                 iounmap(mac->regs);
1244
1245         free_netdev(dev);
1246 out_disable_device:
1247         pci_disable_device(pdev);
1248         return err;
1249
1250 }
1251
1252 static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
1253 {
1254         struct net_device *netdev = pci_get_drvdata(pdev);
1255         struct pasemi_mac *mac;
1256
1257         if (!netdev)
1258                 return;
1259
1260         mac = netdev_priv(netdev);
1261
1262         unregister_netdev(netdev);
1263
1264         pci_disable_device(pdev);
1265         pci_dev_put(mac->dma_pdev);
1266         pci_dev_put(mac->iob_pdev);
1267
1268         iounmap(mac->regs);
1269         iounmap(mac->dma_regs);
1270         iounmap(mac->iob_regs);
1271
1272         pci_set_drvdata(pdev, NULL);
1273         free_netdev(netdev);
1274 }
1275
1276 static struct pci_device_id pasemi_mac_pci_tbl[] = {
1277         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1278         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
1279         { },
1280 };
1281
1282 MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl);
1283
1284 static struct pci_driver pasemi_mac_driver = {
1285         .name           = "pasemi_mac",
1286         .id_table       = pasemi_mac_pci_tbl,
1287         .probe          = pasemi_mac_probe,
1288         .remove         = __devexit_p(pasemi_mac_remove),
1289 };
1290
1291 static void __exit pasemi_mac_cleanup_module(void)
1292 {
1293         pci_unregister_driver(&pasemi_mac_driver);
1294         __iounmap(dma_status);
1295         dma_status = NULL;
1296 }
1297
1298 int pasemi_mac_init_module(void)
1299 {
1300         return pci_register_driver(&pasemi_mac_driver);
1301 }
1302
1303 module_init(pasemi_mac_init_module);
1304 module_exit(pasemi_mac_cleanup_module);