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_RING(mac, num)       ((mac)->tx->ring[(num) & (TX_RING_SIZE-1)])
  67 #define TX_RING_INFO(mac, num)  ((mac)->tx->ring_info[(num) & (TX_RING_SIZE-1)])
  68 #define RX_RING(mac, num)       ((mac)->rx->ring[(num) & (RX_RING_SIZE-1)])
  69 #define RX_RING_INFO(mac, num)  ((mac)->rx->ring_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->ring_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
 178                                   RX_RING_SIZE, GFP_KERNEL);
 179
 180         if (!ring->ring_info)
 181                 goto out_ring_info;
 182
 183         /* Allocate descriptors */
 184         ring->ring = dma_alloc_coherent(&mac->dma_pdev->dev,
 185                                         RX_RING_SIZE * sizeof(u64),
 186                                         &ring->dma, GFP_KERNEL);
 187
 188         if (!ring->ring)
 189                 goto out_ring_desc;
 190
 191         memset(ring->ring, 0, RX_RING_SIZE * sizeof(u64));
 192
 193         ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev,
 194                                            RX_RING_SIZE * sizeof(u64),
 195                                            &ring->buf_dma, GFP_KERNEL);
 196         if (!ring->buffers)
 197                 goto out_buffers;
 198
 199         memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64));
 200
 201         write_dma_reg(mac, PAS_DMA_RXCHAN_BASEL(chan_id), PAS_DMA_RXCHAN_BASEL_BRBL(ring->dma));
 202
 203         write_dma_reg(mac, PAS_DMA_RXCHAN_BASEU(chan_id),
 204                            PAS_DMA_RXCHAN_BASEU_BRBH(ring->dma >> 32) |
 205                            PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 3));
 206
 207         write_dma_reg(mac, PAS_DMA_RXCHAN_CFG(chan_id),
 208                            PAS_DMA_RXCHAN_CFG_HBU(2));
 209
 210         write_dma_reg(mac, PAS_DMA_RXINT_BASEL(mac->dma_if),
 211                            PAS_DMA_RXINT_BASEL_BRBL(__pa(ring->buffers)));
 212
 213         write_dma_reg(mac, PAS_DMA_RXINT_BASEU(mac->dma_if),
 214                            PAS_DMA_RXINT_BASEU_BRBH(__pa(ring->buffers) >> 32) |
 215                            PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
 216
 217         write_dma_reg(mac, PAS_DMA_RXINT_CFG(mac->dma_if),
 218                            PAS_DMA_RXINT_CFG_DHL(2));
 219
 220         ring->next_to_fill = 0;
 221         ring->next_to_clean = 0;
 222
 223         snprintf(ring->irq_name, sizeof(ring->irq_name),
 224                  "%s rx", dev->name);
 225         mac->rx = ring;
 226
 227         return 0;
 228
 229 out_buffers:
 230         dma_free_coherent(&mac->dma_pdev->dev,
 231                           RX_RING_SIZE * sizeof(u64),
 232                           mac->rx->ring, mac->rx->dma);
 233 out_ring_desc:
 234         kfree(ring->ring_info);
 235 out_ring_info:
 236         kfree(ring);
 237 out_ring:
 238         return -ENOMEM;
 239 }
 240
 241
 242 static int pasemi_mac_setup_tx_resources(struct net_device *dev)
 243 {
 244         struct pasemi_mac *mac = netdev_priv(dev);
 245         u32 val;
 246         int chan_id = mac->dma_txch;
 247         struct pasemi_mac_txring *ring;
 248
 249         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
 250         if (!ring)
 251                 goto out_ring;
 252
 253         spin_lock_init(&ring->lock);
 254
 255         ring->size = TX_RING_SIZE;
 256         ring->ring_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
 257                                   TX_RING_SIZE, GFP_KERNEL);
 258         if (!ring->ring_info)
 259                 goto out_ring_info;
 260
 261         /* Allocate descriptors */
 262         ring->ring = dma_alloc_coherent(&mac->dma_pdev->dev,
 263                                         TX_RING_SIZE * sizeof(u64),
 264                                         &ring->dma, GFP_KERNEL);
 265         if (!ring->ring)
 266                 goto out_ring_desc;
 267
 268         memset(ring->ring, 0, TX_RING_SIZE * sizeof(u64));
 269
 270         write_dma_reg(mac, PAS_DMA_TXCHAN_BASEL(chan_id),
 271                            PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma));
 272         val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32);
 273         val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 3);
 274
 275         write_dma_reg(mac, PAS_DMA_TXCHAN_BASEU(chan_id), val);
 276
 277         write_dma_reg(mac, PAS_DMA_TXCHAN_CFG(chan_id),
 278                            PAS_DMA_TXCHAN_CFG_TY_IFACE |
 279                            PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
 280                            PAS_DMA_TXCHAN_CFG_UP |
 281                            PAS_DMA_TXCHAN_CFG_WT(2));
 282
 283         ring->next_to_fill = 0;
 284         ring->next_to_clean = 0;
 285
 286         snprintf(ring->irq_name, sizeof(ring->irq_name),
 287                  "%s tx", dev->name);
 288         mac->tx = ring;
 289
 290         return 0;
 291
 292 out_ring_desc:
 293         kfree(ring->ring_info);
 294 out_ring_info:
 295         kfree(ring);
 296 out_ring:
 297         return -ENOMEM;
 298 }
 299
 300 static void pasemi_mac_free_tx_resources(struct net_device *dev)
 301 {
 302         struct pasemi_mac *mac = netdev_priv(dev);
 303         unsigned int i;
 304         struct pasemi_mac_buffer *info;
 305
 306         for (i = 0; i < TX_RING_SIZE; i += 2) {
 307                 info = &TX_RING_INFO(mac, i+1);
 308                 if (info->dma && info->skb) {
 309                         pci_unmap_single(mac->dma_pdev,
 310                                          info->dma,
 311                                          info->skb->len,
 312                                          PCI_DMA_TODEVICE);
 313                         dev_kfree_skb_any(info->skb);
 314                 }
 315                 TX_RING(mac, i) = 0;
 316                 TX_RING(mac, i+1) = 0;
 317                 info->dma = 0;
 318                 info->skb = NULL;
 319         }
 320
 321         dma_free_coherent(&mac->dma_pdev->dev,
 322                           TX_RING_SIZE * sizeof(u64),
 323                           mac->tx->ring, mac->tx->dma);
 324
 325         kfree(mac->tx->ring_info);
 326         kfree(mac->tx);
 327         mac->tx = NULL;
 328 }
 329
 330 static void pasemi_mac_free_rx_resources(struct net_device *dev)
 331 {
 332         struct pasemi_mac *mac = netdev_priv(dev);
 333         unsigned int i;
 334         struct pasemi_mac_buffer *info;
 335
 336         for (i = 0; i < RX_RING_SIZE; i++) {
 337                 info = &RX_RING_INFO(mac, i);
 338                 if (info->skb && info->dma) {
 339                         pci_unmap_single(mac->dma_pdev,
 340                                          info->dma,
 341                                          info->skb->len,
 342                                          PCI_DMA_FROMDEVICE);
 343                         dev_kfree_skb_any(info->skb);
 344                 }
 345                 info->dma = 0;
 346                 info->skb = NULL;
 347         }
 348
 349         for (i = 0; i < RX_RING_SIZE; i++)
 350                 RX_RING(mac, i) = 0;
 351
 352         dma_free_coherent(&mac->dma_pdev->dev,
 353                           RX_RING_SIZE * sizeof(u64),
 354                           mac->rx->ring, mac->rx->dma);
 355
 356         dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
 357                           mac->rx->buffers, mac->rx->buf_dma);
 358
 359         kfree(mac->rx->ring_info);
 360         kfree(mac->rx);
 361         mac->rx = NULL;
 362 }
 363
 364 static void pasemi_mac_replenish_rx_ring(struct net_device *dev, int limit)
 365 {
 366         struct pasemi_mac *mac = netdev_priv(dev);
 367         int start = mac->rx->next_to_fill;
 368         unsigned int fill, count;
 369
 370         if (limit <= 0)
 371                 return;
 372
 373         fill = start;
 374         for (count = 0; count < limit; count++) {
 375                 struct pasemi_mac_buffer *info = &RX_RING_INFO(mac, fill);
 376                 u64 *buff = &RX_BUFF(mac, fill);
 377                 struct sk_buff *skb;
 378                 dma_addr_t dma;
 379
 380                 /* Entry in use? */
 381                 WARN_ON(*buff);
 382
 383                 /* skb might still be in there for recycle on short receives */
 384                 if (info->skb)
 385                         skb = info->skb;
 386                 else
 387                         skb = dev_alloc_skb(BUF_SIZE);
 388
 389                 if (unlikely(!skb))
 390                         break;
 391
 392                 dma = pci_map_single(mac->dma_pdev, skb->data, BUF_SIZE,
 393                                      PCI_DMA_FROMDEVICE);
 394
 395                 if (unlikely(dma_mapping_error(dma))) {
 396                         dev_kfree_skb_irq(info->skb);
 397                         break;
 398                 }
 399
 400                 info->skb = skb;
 401                 info->dma = dma;
 402                 *buff = XCT_RXB_LEN(BUF_SIZE) | XCT_RXB_ADDR(dma);
 403                 fill++;
 404         }
 405
 406         wmb();
 407
 408         write_dma_reg(mac, PAS_DMA_RXCHAN_INCR(mac->dma_rxch), count);
 409         write_dma_reg(mac, PAS_DMA_RXINT_INCR(mac->dma_if), count);
 410
 411         mac->rx->next_to_fill += count;
 412 }
 413
 414 static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac)
 415 {
 416         unsigned int reg, pcnt;
 417         /* Re-enable packet count interrupts: finally
 418          * ack the packet count interrupt we got in rx_intr.
 419          */
 420
 421         pcnt = *mac->rx_status & PAS_STATUS_PCNT_M;
 422
 423         reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC;
 424
 425         write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
 426 }
 427
 428 static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
 429 {
 430         unsigned int reg, pcnt;
 431
 432         /* Re-enable packet count interrupts */
 433         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
 434
 435         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
 436
 437         write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
 438 }
 439
 440
 441 static inline void pasemi_mac_rx_error(struct pasemi_mac *mac, u64 macrx)
 442 {
 443         unsigned int rcmdsta, ccmdsta;
 444
 445         if (!netif_msg_rx_err(mac))
 446                 return;
 447
 448         rcmdsta = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
 449         ccmdsta = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch));
 450
 451         printk(KERN_ERR "pasemi_mac: rx error. macrx %016lx, rx status %lx\n",
 452                 macrx, *mac->rx_status);
 453
 454         printk(KERN_ERR "pasemi_mac: rcmdsta %08x ccmdsta %08x\n",
 455                 rcmdsta, ccmdsta);
 456 }
 457
 458 static inline void pasemi_mac_tx_error(struct pasemi_mac *mac, u64 mactx)
 459 {
 460         unsigned int cmdsta;
 461
 462         if (!netif_msg_tx_err(mac))
 463                 return;
 464
 465         cmdsta = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch));
 466
 467         printk(KERN_ERR "pasemi_mac: tx error. mactx 0x%016lx, "\
 468                 "tx status 0x%016lx\n", mactx, *mac->tx_status);
 469
 470         printk(KERN_ERR "pasemi_mac: tcmdsta 0x%08x\n", cmdsta);
 471 }
 472
 473 static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
 474 {
 475         unsigned int n;
 476         int count;
 477         struct pasemi_mac_buffer *info;
 478         struct sk_buff *skb;
 479         unsigned int i, len;
 480         u64 macrx;
 481         dma_addr_t dma;
 482
 483         spin_lock(&mac->rx->lock);
 484
 485         n = mac->rx->next_to_clean;
 486
 487         for (count = limit; count; count--) {
 488
 489                 rmb();
 490
 491                 macrx = RX_RING(mac, n);
 492
 493                 if ((macrx & XCT_MACRX_E) ||
 494                     (*mac->rx_status & PAS_STATUS_ERROR))
 495                         pasemi_mac_rx_error(mac, macrx);
 496
 497                 if (!(macrx & XCT_MACRX_O))
 498                         break;
 499
 500                 info = NULL;
 501
 502                 /* We have to scan for our skb since there's no way
 503                  * to back-map them from the descriptor, and if we
 504                  * have several receive channels then they might not
 505                  * show up in the same order as they were put on the
 506                  * interface ring.
 507                  */
 508
 509                 dma = (RX_RING(mac, n+1) & XCT_PTR_ADDR_M);
 510                 for (i = mac->rx->next_to_fill;
 511                      i < (mac->rx->next_to_fill + RX_RING_SIZE);
 512                      i++) {
 513                         info = &RX_RING_INFO(mac, i);
 514                         if (info->dma == dma)
 515                                 break;
 516                 }
 517
 518                 prefetchw(info);
 519
 520                 skb = info->skb;
 521                 prefetchw(skb);
 522                 info->dma = 0;
 523
 524                 pci_unmap_single(mac->dma_pdev, dma, skb->len,
 525                                  PCI_DMA_FROMDEVICE);
 526
 527                 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
 528
 529                 if (len < 256) {
 530                         struct sk_buff *new_skb =
 531                             netdev_alloc_skb(mac->netdev, len + NET_IP_ALIGN);
 532                         if (new_skb) {
 533                                 skb_reserve(new_skb, NET_IP_ALIGN);
 534                                 memcpy(new_skb->data, skb->data, len);
 535                                 /* save the skb in buffer_info as good */
 536                                 skb = new_skb;
 537                         }
 538                         /* else just continue with the old one */
 539                 } else
 540                         info->skb = NULL;
 541
 542                 /* Need to zero it out since hardware doesn't, since the
 543                  * replenish loop uses it to tell when it's done.
 544                  */
 545                 RX_BUFF(mac, i) = 0;
 546
 547                 skb_put(skb, len);
 548
 549                 if (likely((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK)) {
 550                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 551                         skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
 552                                            XCT_MACRX_CSUM_S;
 553                 } else
 554                         skb->ip_summed = CHECKSUM_NONE;
 555
 556                 mac->netdev->stats.rx_bytes += len;
 557                 mac->netdev->stats.rx_packets++;
 558
 559                 skb->protocol = eth_type_trans(skb, mac->netdev);
 560                 netif_receive_skb(skb);
 561
 562                 RX_RING(mac, n) = 0;
 563                 RX_RING(mac, n+1) = 0;
 564
 565                 n += 2;
 566         }
 567
 568         mac->rx->next_to_clean = n;
 569         pasemi_mac_replenish_rx_ring(mac->netdev, limit-count);
 570
 571         spin_unlock(&mac->rx->lock);
 572
 573         return count;
 574 }
 575
 576 static int pasemi_mac_clean_tx(struct pasemi_mac *mac)
 577 {
 578         int i;
 579         struct pasemi_mac_buffer *info;
 580         unsigned int start, count, limit;
 581         unsigned int total_count;
 582         unsigned long flags;
 583         struct sk_buff *skbs[32];
 584         dma_addr_t dmas[32];
 585
 586         total_count = 0;
 587 restart:
 588         spin_lock_irqsave(&mac->tx->lock, flags);
 589
 590         start = mac->tx->next_to_clean;
 591         limit = min(mac->tx->next_to_fill, start+32);
 592
 593         count = 0;
 594
 595         for (i = start; i < limit; i += 2) {
 596                 u64 mactx = TX_RING(mac, i);
 597                 if ((mactx  & XCT_MACTX_E) ||
 598                     (*mac->tx_status & PAS_STATUS_ERROR))
 599                         pasemi_mac_tx_error(mac, mactx);
 600
 601                 if (unlikely(mactx & XCT_MACTX_O))
 602                         /* Not yet transmitted */
 603                         break;
 604
 605                 info = &TX_RING_INFO(mac, i+1);
 606                 skbs[count] = info->skb;
 607                 dmas[count] = info->dma;
 608
 609                 info->dma = 0;
 610                 TX_RING(mac, i) = 0;
 611                 TX_RING(mac, i+1) = 0;
 612
 613
 614                 count++;
 615         }
 616         mac->tx->next_to_clean += count * 2;
 617         spin_unlock_irqrestore(&mac->tx->lock, flags);
 618         netif_wake_queue(mac->netdev);
 619
 620         for (i = 0; i < count; i++) {
 621                 pci_unmap_single(mac->dma_pdev, dmas[i],
 622                                  skbs[i]->len, PCI_DMA_TODEVICE);
 623                 dev_kfree_skb_irq(skbs[i]);
 624         }
 625
 626         total_count += count;
 627
 628         /* If the batch was full, try to clean more */
 629         if (count == 32)
 630                 goto restart;
 631
 632         return total_count;
 633 }
 634
 635
 636 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
 637 {
 638         struct net_device *dev = data;
 639         struct pasemi_mac *mac = netdev_priv(dev);
 640         unsigned int reg;
 641
 642         if (!(*mac->rx_status & PAS_STATUS_CAUSE_M))
 643                 return IRQ_NONE;
 644
 645         /* Don't reset packet count so it won't fire again but clear
 646          * all others.
 647          */
 648
 649         reg = 0;
 650         if (*mac->rx_status & PAS_STATUS_SOFT)
 651                 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
 652         if (*mac->rx_status & PAS_STATUS_ERROR)
 653                 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
 654         if (*mac->rx_status & PAS_STATUS_TIMER)
 655                 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
 656
 657         netif_rx_schedule(dev, &mac->napi);
 658
 659         write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
 660
 661         return IRQ_HANDLED;
 662 }
 663
 664 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
 665 {
 666         struct net_device *dev = data;
 667         struct pasemi_mac *mac = netdev_priv(dev);
 668         unsigned int reg, pcnt;
 669
 670         if (!(*mac->tx_status & PAS_STATUS_CAUSE_M))
 671                 return IRQ_NONE;
 672
 673         pasemi_mac_clean_tx(mac);
 674
 675         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
 676
 677         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
 678
 679         if (*mac->tx_status & PAS_STATUS_SOFT)
 680                 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
 681         if (*mac->tx_status & PAS_STATUS_ERROR)
 682                 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
 683
 684         write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
 685
 686         return IRQ_HANDLED;
 687 }
 688
 689 static void pasemi_adjust_link(struct net_device *dev)
 690 {
 691         struct pasemi_mac *mac = netdev_priv(dev);
 692         int msg;
 693         unsigned int flags;
 694         unsigned int new_flags;
 695
 696         if (!mac->phydev->link) {
 697                 /* If no link, MAC speed settings don't matter. Just report
 698                  * link down and return.
 699                  */
 700                 if (mac->link && netif_msg_link(mac))
 701                         printk(KERN_INFO "%s: Link is down.\n", dev->name);
 702
 703                 netif_carrier_off(dev);
 704                 mac->link = 0;
 705
 706                 return;
 707         } else
 708                 netif_carrier_on(dev);
 709
 710         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
 711         new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
 712                               PAS_MAC_CFG_PCFG_TSR_M);
 713
 714         if (!mac->phydev->duplex)
 715                 new_flags |= PAS_MAC_CFG_PCFG_HD;
 716
 717         switch (mac->phydev->speed) {
 718         case 1000:
 719                 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
 720                              PAS_MAC_CFG_PCFG_TSR_1G;
 721                 break;
 722         case 100:
 723                 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
 724                              PAS_MAC_CFG_PCFG_TSR_100M;
 725                 break;
 726         case 10:
 727                 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
 728                              PAS_MAC_CFG_PCFG_TSR_10M;
 729                 break;
 730         default:
 731                 printk("Unsupported speed %d\n", mac->phydev->speed);
 732         }
 733
 734         /* Print on link or speed/duplex change */
 735         msg = mac->link != mac->phydev->link || flags != new_flags;
 736
 737         mac->duplex = mac->phydev->duplex;
 738         mac->speed = mac->phydev->speed;
 739         mac->link = mac->phydev->link;
 740
 741         if (new_flags != flags)
 742                 write_mac_reg(mac, PAS_MAC_CFG_PCFG, new_flags);
 743
 744         if (msg && netif_msg_link(mac))
 745                 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
 746                        dev->name, mac->speed, mac->duplex ? "full" : "half");
 747 }
 748
 749 static int pasemi_mac_phy_init(struct net_device *dev)
 750 {
 751         struct pasemi_mac *mac = netdev_priv(dev);
 752         struct device_node *dn, *phy_dn;
 753         struct phy_device *phydev;
 754         unsigned int phy_id;
 755         const phandle *ph;
 756         const unsigned int *prop;
 757         struct resource r;
 758         int ret;
 759
 760         dn = pci_device_to_OF_node(mac->pdev);
 761         ph = of_get_property(dn, "phy-handle", NULL);
 762         if (!ph)
 763                 return -ENODEV;
 764         phy_dn = of_find_node_by_phandle(*ph);
 765
 766         prop = of_get_property(phy_dn, "reg", NULL);
 767         ret = of_address_to_resource(phy_dn->parent, 0, &r);
 768         if (ret)
 769                 goto err;
 770
 771         phy_id = *prop;
 772         snprintf(mac->phy_id, BUS_ID_SIZE, PHY_ID_FMT, (int)r.start, phy_id);
 773
 774         of_node_put(phy_dn);
 775
 776         mac->link = 0;
 777         mac->speed = 0;
 778         mac->duplex = -1;
 779
 780         phydev = phy_connect(dev, mac->phy_id, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
 781
 782         if (IS_ERR(phydev)) {
 783                 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
 784                 return PTR_ERR(phydev);
 785         }
 786
 787         mac->phydev = phydev;
 788
 789         return 0;
 790
 791 err:
 792         of_node_put(phy_dn);
 793         return -ENODEV;
 794 }
 795
 796
 797 static int pasemi_mac_open(struct net_device *dev)
 798 {
 799         struct pasemi_mac *mac = netdev_priv(dev);
 800         int base_irq;
 801         unsigned int flags;
 802         int ret;
 803
 804         /* enable rx section */
 805         write_dma_reg(mac, PAS_DMA_COM_RXCMD, PAS_DMA_COM_RXCMD_EN);
 806
 807         /* enable tx section */
 808         write_dma_reg(mac, PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN);
 809
 810         flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
 811                 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
 812                 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
 813
 814         write_mac_reg(mac, PAS_MAC_CFG_TXP, flags);
 815
 816         write_iob_reg(mac, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
 817                            PAS_IOB_DMA_RXCH_CFG_CNTTH(0));
 818
 819         write_iob_reg(mac, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch),
 820                            PAS_IOB_DMA_TXCH_CFG_CNTTH(128));
 821
 822         /* Clear out any residual packet count state from firmware */
 823         pasemi_mac_restart_rx_intr(mac);
 824         pasemi_mac_restart_tx_intr(mac);
 825
 826         /* 0xffffff is max value, about 16ms */
 827         write_iob_reg(mac, PAS_IOB_DMA_COM_TIMEOUTCFG,
 828                            PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
 829
 830         ret = pasemi_mac_setup_rx_resources(dev);
 831         if (ret)
 832                 goto out_rx_resources;
 833
 834         ret = pasemi_mac_setup_tx_resources(dev);
 835         if (ret)
 836                 goto out_tx_resources;
 837
 838         write_mac_reg(mac, PAS_MAC_IPC_CHNL,
 839                            PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) |
 840                            PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch));
 841
 842         /* enable rx if */
 843         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
 844                            PAS_DMA_RXINT_RCMDSTA_EN);
 845
 846         /* enable rx channel */
 847         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
 848                            PAS_DMA_RXCHAN_CCMDSTA_EN |
 849                            PAS_DMA_RXCHAN_CCMDSTA_DU);
 850
 851         /* enable tx channel */
 852         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
 853                            PAS_DMA_TXCHAN_TCMDSTA_EN);
 854
 855         pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE);
 856
 857         flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
 858                 PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
 859
 860         if (mac->type == MAC_TYPE_GMAC)
 861                 flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
 862         else
 863                 flags |= PAS_MAC_CFG_PCFG_TSR_10G | PAS_MAC_CFG_PCFG_SPD_10G;
 864
 865         /* Enable interface in MAC */
 866         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
 867
 868         ret = pasemi_mac_phy_init(dev);
 869         /* Some configs don't have PHYs (XAUI etc), so don't complain about
 870          * failed init due to -ENODEV.
 871          */
 872         if (ret && ret != -ENODEV)
 873                 dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
 874
 875         netif_start_queue(dev);
 876         napi_enable(&mac->napi);
 877
 878         /* Interrupts are a bit different for our DMA controller: While
 879          * it's got one a regular PCI device header, the interrupt there
 880          * is really the base of the range it's using. Each tx and rx
 881          * channel has it's own interrupt source.
 882          */
 883
 884         base_irq = virq_to_hw(mac->dma_pdev->irq);
 885
 886         mac->tx_irq = irq_create_mapping(NULL, base_irq + mac->dma_txch);
 887         mac->rx_irq = irq_create_mapping(NULL, base_irq + 20 + mac->dma_txch);
 888
 889         ret = request_irq(mac->tx_irq, &pasemi_mac_tx_intr, IRQF_DISABLED,
 890                           mac->tx->irq_name, dev);
 891         if (ret) {
 892                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 893                         base_irq + mac->dma_txch, ret);
 894                 goto out_tx_int;
 895         }
 896
 897         ret = request_irq(mac->rx_irq, &pasemi_mac_rx_intr, IRQF_DISABLED,
 898                           mac->rx->irq_name, dev);
 899         if (ret) {
 900                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 901                         base_irq + 20 + mac->dma_rxch, ret);
 902                 goto out_rx_int;
 903         }
 904
 905         if (mac->phydev)
 906                 phy_start(mac->phydev);
 907
 908         return 0;
 909
 910 out_rx_int:
 911         free_irq(mac->tx_irq, dev);
 912 out_tx_int:
 913         napi_disable(&mac->napi);
 914         netif_stop_queue(dev);
 915         pasemi_mac_free_tx_resources(dev);
 916 out_tx_resources:
 917         pasemi_mac_free_rx_resources(dev);
 918 out_rx_resources:
 919
 920         return ret;
 921 }
 922
 923 #define MAX_RETRIES 5000
 924
 925 static int pasemi_mac_close(struct net_device *dev)
 926 {
 927         struct pasemi_mac *mac = netdev_priv(dev);
 928         unsigned int stat;
 929         int retries;
 930
 931         if (mac->phydev) {
 932                 phy_stop(mac->phydev);
 933                 phy_disconnect(mac->phydev);
 934         }
 935
 936         netif_stop_queue(dev);
 937         napi_disable(&mac->napi);
 938
 939         /* Clean out any pending buffers */
 940         pasemi_mac_clean_tx(mac);
 941         pasemi_mac_clean_rx(mac, RX_RING_SIZE);
 942
 943         /* Disable interface */
 944         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), PAS_DMA_TXCHAN_TCMDSTA_ST);
 945         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), PAS_DMA_RXINT_RCMDSTA_ST);
 946         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), PAS_DMA_RXCHAN_CCMDSTA_ST);
 947
 948         for (retries = 0; retries < MAX_RETRIES; retries++) {
 949                 stat = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch));
 950                 if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT))
 951                         break;
 952                 cond_resched();
 953         }
 954
 955         if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)
 956                 dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel\n");
 957
 958         for (retries = 0; retries < MAX_RETRIES; retries++) {
 959                 stat = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch));
 960                 if (!(stat & PAS_DMA_RXCHAN_CCMDSTA_ACT))
 961                         break;
 962                 cond_resched();
 963         }
 964
 965         if (stat & PAS_DMA_RXCHAN_CCMDSTA_ACT)
 966                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx channel\n");
 967
 968         for (retries = 0; retries < MAX_RETRIES; retries++) {
 969                 stat = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
 970                 if (!(stat & PAS_DMA_RXINT_RCMDSTA_ACT))
 971                         break;
 972                 cond_resched();
 973         }
 974
 975         if (stat & PAS_DMA_RXINT_RCMDSTA_ACT)
 976                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx interface\n");
 977
 978         /* Then, disable the channel. This must be done separately from
 979          * stopping, since you can't disable when active.
 980          */
 981
 982         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0);
 983         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0);
 984         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
 985
 986         free_irq(mac->tx_irq, dev);
 987         free_irq(mac->rx_irq, dev);
 988
 989         /* Free resources */
 990         pasemi_mac_free_rx_resources(dev);
 991         pasemi_mac_free_tx_resources(dev);
 992
 993         return 0;
 994 }
 995
 996 static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
 997 {
 998         struct pasemi_mac *mac = netdev_priv(dev);
 999         struct pasemi_mac_txring *txring;
1000         u64 dflags, mactx, ptr;
1001         dma_addr_t map;
1002         unsigned long flags;
1003
1004         dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_SS | XCT_MACTX_CRC_PAD;
1005
1006         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1007                 const unsigned char *nh = skb_network_header(skb);
1008
1009                 switch (ip_hdr(skb)->protocol) {
1010                 case IPPROTO_TCP:
1011                         dflags |= XCT_MACTX_CSUM_TCP;
1012                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
1013                         dflags |= XCT_MACTX_IPO(nh - skb->data);
1014                         break;
1015                 case IPPROTO_UDP:
1016                         dflags |= XCT_MACTX_CSUM_UDP;
1017                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
1018                         dflags |= XCT_MACTX_IPO(nh - skb->data);
1019                         break;
1020                 }
1021         }
1022
1023         map = pci_map_single(mac->dma_pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
1024
1025         if (dma_mapping_error(map))
1026                 return NETDEV_TX_BUSY;
1027
1028         mactx = dflags | XCT_MACTX_LLEN(skb->len);
1029         ptr   = XCT_PTR_LEN(skb->len) | XCT_PTR_ADDR(map);
1030
1031         txring = mac->tx;
1032
1033         spin_lock_irqsave(&txring->lock, flags);
1034
1035         if (RING_AVAIL(txring) <= 2) {
1036                 spin_unlock_irqrestore(&txring->lock, flags);
1037                 pasemi_mac_clean_tx(mac);
1038                 pasemi_mac_restart_tx_intr(mac);
1039                 spin_lock_irqsave(&txring->lock, flags);
1040
1041                 if (RING_AVAIL(txring) <= 2) {
1042                         /* Still no room -- stop the queue and wait for tx
1043                          * intr when there's room.
1044                          */
1045                         netif_stop_queue(dev);
1046                         goto out_err;
1047                 }
1048         }
1049
1050         TX_RING(mac, txring->next_to_fill) = mactx;
1051         TX_RING(mac, txring->next_to_fill+1) = ptr;
1052
1053         TX_RING_INFO(mac, txring->next_to_fill+1).dma = map;
1054         TX_RING_INFO(mac, txring->next_to_fill+1).skb = skb;
1055
1056         txring->next_to_fill += 2;
1057
1058         dev->stats.tx_packets++;
1059         dev->stats.tx_bytes += skb->len;
1060
1061         spin_unlock_irqrestore(&txring->lock, flags);
1062
1063         write_dma_reg(mac, PAS_DMA_TXCHAN_INCR(mac->dma_txch), 1);
1064
1065         return NETDEV_TX_OK;
1066
1067 out_err:
1068         spin_unlock_irqrestore(&txring->lock, flags);
1069         pci_unmap_single(mac->dma_pdev, map, skb->len, PCI_DMA_TODEVICE);
1070         return NETDEV_TX_BUSY;
1071 }
1072
1073 static void pasemi_mac_set_rx_mode(struct net_device *dev)
1074 {
1075         struct pasemi_mac *mac = netdev_priv(dev);
1076         unsigned int flags;
1077
1078         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
1079
1080         /* Set promiscuous */
1081         if (dev->flags & IFF_PROMISC)
1082                 flags |= PAS_MAC_CFG_PCFG_PR;
1083         else
1084                 flags &= ~PAS_MAC_CFG_PCFG_PR;
1085
1086         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
1087 }
1088
1089
1090 static int pasemi_mac_poll(struct napi_struct *napi, int budget)
1091 {
1092         struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi);
1093         struct net_device *dev = mac->netdev;
1094         int pkts;
1095
1096         pasemi_mac_clean_tx(mac);
1097         pkts = pasemi_mac_clean_rx(mac, budget);
1098         if (pkts < budget) {
1099                 /* all done, no more packets present */
1100                 netif_rx_complete(dev, napi);
1101
1102                 pasemi_mac_restart_rx_intr(mac);
1103         }
1104         return pkts;
1105 }
1106
1107 static void __iomem * __devinit map_onedev(struct pci_dev *p, int index)
1108 {
1109         struct device_node *dn;
1110         void __iomem *ret;
1111
1112         dn = pci_device_to_OF_node(p);
1113         if (!dn)
1114                 goto fallback;
1115
1116         ret = of_iomap(dn, index);
1117         if (!ret)
1118                 goto fallback;
1119
1120         return ret;
1121 fallback:
1122         /* This is hardcoded and ugly, but we have some firmware versions
1123          * that don't provide the register space in the device tree. Luckily
1124          * they are at well-known locations so we can just do the math here.
1125          */
1126         return ioremap(0xe0000000 + (p->devfn << 12), 0x2000);
1127 }
1128
1129 static int __devinit pasemi_mac_map_regs(struct pasemi_mac *mac)
1130 {
1131         struct resource res;
1132         struct device_node *dn;
1133         int err;
1134
1135         mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1136         if (!mac->dma_pdev) {
1137                 dev_err(&mac->pdev->dev, "Can't find DMA Controller\n");
1138                 return -ENODEV;
1139         }
1140
1141         mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1142         if (!mac->iob_pdev) {
1143                 dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n");
1144                 return -ENODEV;
1145         }
1146
1147         mac->regs = map_onedev(mac->pdev, 0);
1148         mac->dma_regs = map_onedev(mac->dma_pdev, 0);
1149         mac->iob_regs = map_onedev(mac->iob_pdev, 0);
1150
1151         if (!mac->regs || !mac->dma_regs || !mac->iob_regs) {
1152                 dev_err(&mac->pdev->dev, "Can't map registers\n");
1153                 return -ENODEV;
1154         }
1155
1156         /* The dma status structure is located in the I/O bridge, and
1157          * is cache coherent.
1158          */
1159         if (!dma_status) {
1160                 dn = pci_device_to_OF_node(mac->iob_pdev);
1161                 if (dn)
1162                         err = of_address_to_resource(dn, 1, &res);
1163                 if (!dn || err) {
1164                         /* Fallback for old firmware */
1165                         res.start = 0xfd800000;
1166                         res.end = res.start + 0x1000;
1167                 }
1168                 dma_status = __ioremap(res.start, res.end-res.start, 0);
1169         }
1170
1171         return 0;
1172 }
1173
1174 static int __devinit
1175 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1176 {
1177         static int index = 0;
1178         struct net_device *dev;
1179         struct pasemi_mac *mac;
1180         int err;
1181         DECLARE_MAC_BUF(mac_buf);
1182
1183         err = pci_enable_device(pdev);
1184         if (err)
1185                 return err;
1186
1187         dev = alloc_etherdev(sizeof(struct pasemi_mac));
1188         if (dev == NULL) {
1189                 dev_err(&pdev->dev,
1190                         "pasemi_mac: Could not allocate ethernet device.\n");
1191                 err = -ENOMEM;
1192                 goto out_disable_device;
1193         }
1194
1195         pci_set_drvdata(pdev, dev);
1196         SET_NETDEV_DEV(dev, &pdev->dev);
1197
1198         mac = netdev_priv(dev);
1199
1200         mac->pdev = pdev;
1201         mac->netdev = dev;
1202
1203         netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64);
1204
1205         dev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
1206
1207         /* These should come out of the device tree eventually */
1208         mac->dma_txch = index;
1209         mac->dma_rxch = index;
1210
1211         /* We probe GMAC before XAUI, but the DMA interfaces are
1212          * in XAUI, GMAC order.
1213          */
1214         if (index < 4)
1215                 mac->dma_if = index + 2;
1216         else
1217                 mac->dma_if = index - 4;
1218         index++;
1219
1220         switch (pdev->device) {
1221         case 0xa005:
1222                 mac->type = MAC_TYPE_GMAC;
1223                 break;
1224         case 0xa006:
1225                 mac->type = MAC_TYPE_XAUI;
1226                 break;
1227         default:
1228                 err = -ENODEV;
1229                 goto out;
1230         }
1231
1232         /* get mac addr from device tree */
1233         if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1234                 err = -ENODEV;
1235                 goto out;
1236         }
1237         memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr));
1238
1239         dev->open = pasemi_mac_open;
1240         dev->stop = pasemi_mac_close;
1241         dev->hard_start_xmit = pasemi_mac_start_tx;
1242         dev->set_multicast_list = pasemi_mac_set_rx_mode;
1243
1244         err = pasemi_mac_map_regs(mac);
1245         if (err)
1246                 goto out;
1247
1248         mac->rx_status = &dma_status->rx_sta[mac->dma_rxch];
1249         mac->tx_status = &dma_status->tx_sta[mac->dma_txch];
1250
1251         mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1252
1253         /* Enable most messages by default */
1254         mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1255
1256         err = register_netdev(dev);
1257
1258         if (err) {
1259                 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1260                         err);
1261                 goto out;
1262         } else if netif_msg_probe(mac)
1263                 printk(KERN_INFO "%s: PA Semi %s: intf %d, txch %d, rxch %d, "
1264                        "hw addr %s\n",
1265                        dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
1266                        mac->dma_if, mac->dma_txch, mac->dma_rxch,
1267                        print_mac(mac_buf, dev->dev_addr));
1268
1269         return err;
1270
1271 out:
1272         if (mac->iob_pdev)
1273                 pci_dev_put(mac->iob_pdev);
1274         if (mac->dma_pdev)
1275                 pci_dev_put(mac->dma_pdev);
1276         if (mac->dma_regs)
1277                 iounmap(mac->dma_regs);
1278         if (mac->iob_regs)
1279                 iounmap(mac->iob_regs);
1280         if (mac->regs)
1281                 iounmap(mac->regs);
1282
1283         free_netdev(dev);
1284 out_disable_device:
1285         pci_disable_device(pdev);
1286         return err;
1287
1288 }
1289
1290 static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
1291 {
1292         struct net_device *netdev = pci_get_drvdata(pdev);
1293         struct pasemi_mac *mac;
1294
1295         if (!netdev)
1296                 return;
1297
1298         mac = netdev_priv(netdev);
1299
1300         unregister_netdev(netdev);
1301
1302         pci_disable_device(pdev);
1303         pci_dev_put(mac->dma_pdev);
1304         pci_dev_put(mac->iob_pdev);
1305
1306         iounmap(mac->regs);
1307         iounmap(mac->dma_regs);
1308         iounmap(mac->iob_regs);
1309
1310         pci_set_drvdata(pdev, NULL);
1311         free_netdev(netdev);
1312 }
1313
1314 static struct pci_device_id pasemi_mac_pci_tbl[] = {
1315         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1316         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
1317         { },
1318 };
1319
1320 MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl);
1321
1322 static struct pci_driver pasemi_mac_driver = {
1323         .name           = "pasemi_mac",
1324         .id_table       = pasemi_mac_pci_tbl,
1325         .probe          = pasemi_mac_probe,
1326         .remove         = __devexit_p(pasemi_mac_remove),
1327 };
1328
1329 static void __exit pasemi_mac_cleanup_module(void)
1330 {
1331         pci_unregister_driver(&pasemi_mac_driver);
1332         __iounmap(dma_status);
1333         dma_status = NULL;
1334 }
1335
1336 int pasemi_mac_init_module(void)
1337 {
1338         return pci_register_driver(&pasemi_mac_driver);
1339 }
1340
1341 module_init(pasemi_mac_init_module);
1342 module_exit(pasemi_mac_cleanup_module);