drivers/net/pasemi_mac.c

   1 /*
   2  * Copyright (C) 2006-2007 PA Semi, Inc
   3  *
   4  * Driver for the PA Semi PWRficient onchip 1G/10G Ethernet MACs
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  18  */
  19
  20 #include <linux/init.h>
  21 #include <linux/module.h>
  22 #include <linux/pci.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/dmaengine.h>
  25 #include <linux/delay.h>
  26 #include <linux/netdevice.h>
  27 #include <linux/etherdevice.h>
  28 #include <asm/dma-mapping.h>
  29 #include <linux/in.h>
  30 #include <linux/skbuff.h>
  31
  32 #include <linux/ip.h>
  33 #include <linux/tcp.h>
  34 #include <net/checksum.h>
  35
  36 #include <asm/irq.h>
  37
  38 #include "pasemi_mac.h"
  39
  40
  41 /* TODO list
  42  *
  43  * - Get rid of pci_{read,write}_config(), map registers with ioremap
  44  *   for performance
  45  * - PHY support
  46  * - Multicast support
  47  * - Large MTU support
  48  * - Other performance improvements
  49  */
  50
  51
  52 /* Must be a power of two */
  53 #define RX_RING_SIZE 512
  54 #define TX_RING_SIZE 512
  55
  56 #define DEFAULT_MSG_ENABLE        \
  57         (NETIF_MSG_DRV          | \
  58          NETIF_MSG_PROBE        | \
  59          NETIF_MSG_LINK         | \
  60          NETIF_MSG_TIMER        | \
  61          NETIF_MSG_IFDOWN       | \
  62          NETIF_MSG_IFUP         | \
  63          NETIF_MSG_RX_ERR       | \
  64          NETIF_MSG_TX_ERR)
  65
  66 #define TX_DESC(mac, num)       ((mac)->tx->desc[(num) & (TX_RING_SIZE-1)])
  67 #define TX_DESC_INFO(mac, num)  ((mac)->tx->desc_info[(num) & (TX_RING_SIZE-1)])
  68 #define RX_DESC(mac, num)       ((mac)->rx->desc[(num) & (RX_RING_SIZE-1)])
  69 #define RX_DESC_INFO(mac, num)  ((mac)->rx->desc_info[(num) & (RX_RING_SIZE-1)])
  70 #define RX_BUFF(mac, num)       ((mac)->rx->buffers[(num) & (RX_RING_SIZE-1)])
  71
  72 #define RING_USED(ring)         (((ring)->next_to_fill - (ring)->next_to_clean) \
  73                                  & ((ring)->size - 1))
  74 #define RING_AVAIL(ring)        ((ring->size) - RING_USED(ring))
  75
  76 #define BUF_SIZE 1646 /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
  77
  78 MODULE_LICENSE("GPL");
  79 MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
  80 MODULE_DESCRIPTION("PA Semi PWRficient Ethernet driver");
  81
  82 static int debug = -1;  /* -1 == use DEFAULT_MSG_ENABLE as value */
  83 module_param(debug, int, 0);
  84 MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value");
  85
  86 static struct pasdma_status *dma_status;
  87
  88 static void write_iob_reg(struct pasemi_mac *mac, unsigned int reg,
  89                           unsigned int val)
  90 {
  91         out_le32(mac->iob_regs+reg, val);
  92 }
  93
  94 static unsigned int read_mac_reg(struct pasemi_mac *mac, unsigned int reg)
  95 {
  96         return in_le32(mac->regs+reg);
  97 }
  98
  99 static void write_mac_reg(struct pasemi_mac *mac, unsigned int reg,
 100                           unsigned int val)
 101 {
 102         out_le32(mac->regs+reg, val);
 103 }
 104
 105 static unsigned int read_dma_reg(struct pasemi_mac *mac, unsigned int reg)
 106 {
 107         return in_le32(mac->dma_regs+reg);
 108 }
 109
 110 static void write_dma_reg(struct pasemi_mac *mac, unsigned int reg,
 111                           unsigned int val)
 112 {
 113         out_le32(mac->dma_regs+reg, val);
 114 }
 115
 116 static int pasemi_get_mac_addr(struct pasemi_mac *mac)
 117 {
 118         struct pci_dev *pdev = mac->pdev;
 119         struct device_node *dn = pci_device_to_OF_node(pdev);
 120         int len;
 121         const u8 *maddr;
 122         u8 addr[6];
 123
 124         if (!dn) {
 125                 dev_dbg(&pdev->dev,
 126                           "No device node for mac, not configuring\n");
 127                 return -ENOENT;
 128         }
 129
 130         maddr = of_get_property(dn, "local-mac-address", &len);
 131
 132         if (maddr && len == 6) {
 133                 memcpy(mac->mac_addr, maddr, 6);
 134                 return 0;
 135         }
 136
 137         /* Some old versions of firmware mistakenly uses mac-address
 138          * (and as a string) instead of a byte array in local-mac-address.
 139          */
 140
 141         if (maddr == NULL)
 142                 maddr = of_get_property(dn, "mac-address", NULL);
 143
 144         if (maddr == NULL) {
 145                 dev_warn(&pdev->dev,
 146                          "no mac address in device tree, not configuring\n");
 147                 return -ENOENT;
 148         }
 149
 150
 151         if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0],
 152                    &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) {
 153                 dev_warn(&pdev->dev,
 154                          "can't parse mac address, not configuring\n");
 155                 return -EINVAL;
 156         }
 157
 158         memcpy(mac->mac_addr, addr, 6);
 159
 160         return 0;
 161 }
 162
 163 static int pasemi_mac_setup_rx_resources(struct net_device *dev)
 164 {
 165         struct pasemi_mac_rxring *ring;
 166         struct pasemi_mac *mac = netdev_priv(dev);
 167         int chan_id = mac->dma_rxch;
 168
 169         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
 170
 171         if (!ring)
 172                 goto out_ring;
 173
 174         spin_lock_init(&ring->lock);
 175
 176         ring->size = RX_RING_SIZE;
 177         ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
 178                                   RX_RING_SIZE, GFP_KERNEL);
 179
 180         if (!ring->desc_info)
 181                 goto out_desc_info;
 182
 183         /* Allocate descriptors */
 184         ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
 185                                         RX_RING_SIZE *
 186                                         sizeof(struct pas_dma_xct_descr),
 187                                         &ring->dma, GFP_KERNEL);
 188
 189         if (!ring->desc)
 190                 goto out_desc;
 191
 192         memset(ring->desc, 0, RX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
 193
 194         ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev,
 195                                            RX_RING_SIZE * sizeof(u64),
 196                                            &ring->buf_dma, GFP_KERNEL);
 197         if (!ring->buffers)
 198                 goto out_buffers;
 199
 200         memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64));
 201
 202         write_dma_reg(mac, PAS_DMA_RXCHAN_BASEL(chan_id), PAS_DMA_RXCHAN_BASEL_BRBL(ring->dma));
 203
 204         write_dma_reg(mac, PAS_DMA_RXCHAN_BASEU(chan_id),
 205                            PAS_DMA_RXCHAN_BASEU_BRBH(ring->dma >> 32) |
 206                            PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 2));
 207
 208         write_dma_reg(mac, PAS_DMA_RXCHAN_CFG(chan_id),
 209                            PAS_DMA_RXCHAN_CFG_HBU(2));
 210
 211         write_dma_reg(mac, PAS_DMA_RXINT_BASEL(mac->dma_if),
 212                            PAS_DMA_RXINT_BASEL_BRBL(__pa(ring->buffers)));
 213
 214         write_dma_reg(mac, PAS_DMA_RXINT_BASEU(mac->dma_if),
 215                            PAS_DMA_RXINT_BASEU_BRBH(__pa(ring->buffers) >> 32) |
 216                            PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
 217
 218         write_dma_reg(mac, PAS_DMA_RXINT_CFG(mac->dma_if),
 219                            PAS_DMA_RXINT_CFG_DHL(2));
 220
 221         ring->next_to_fill = 0;
 222         ring->next_to_clean = 0;
 223
 224         snprintf(ring->irq_name, sizeof(ring->irq_name),
 225                  "%s rx", dev->name);
 226         mac->rx = ring;
 227
 228         return 0;
 229
 230 out_buffers:
 231         dma_free_coherent(&mac->dma_pdev->dev,
 232                           RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 233                           mac->rx->desc, mac->rx->dma);
 234 out_desc:
 235         kfree(ring->desc_info);
 236 out_desc_info:
 237         kfree(ring);
 238 out_ring:
 239         return -ENOMEM;
 240 }
 241
 242
 243 static int pasemi_mac_setup_tx_resources(struct net_device *dev)
 244 {
 245         struct pasemi_mac *mac = netdev_priv(dev);
 246         u32 val;
 247         int chan_id = mac->dma_txch;
 248         struct pasemi_mac_txring *ring;
 249
 250         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
 251         if (!ring)
 252                 goto out_ring;
 253
 254         spin_lock_init(&ring->lock);
 255
 256         ring->size = TX_RING_SIZE;
 257         ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
 258                                   TX_RING_SIZE, GFP_KERNEL);
 259         if (!ring->desc_info)
 260                 goto out_desc_info;
 261
 262         /* Allocate descriptors */
 263         ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
 264                                         TX_RING_SIZE *
 265                                         sizeof(struct pas_dma_xct_descr),
 266                                         &ring->dma, GFP_KERNEL);
 267         if (!ring->desc)
 268                 goto out_desc;
 269
 270         memset(ring->desc, 0, TX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
 271
 272         write_dma_reg(mac, PAS_DMA_TXCHAN_BASEL(chan_id),
 273                            PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma));
 274         val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32);
 275         val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 2);
 276
 277         write_dma_reg(mac, PAS_DMA_TXCHAN_BASEU(chan_id), val);
 278
 279         write_dma_reg(mac, PAS_DMA_TXCHAN_CFG(chan_id),
 280                            PAS_DMA_TXCHAN_CFG_TY_IFACE |
 281                            PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
 282                            PAS_DMA_TXCHAN_CFG_UP |
 283                            PAS_DMA_TXCHAN_CFG_WT(2));
 284
 285         ring->next_to_fill = 0;
 286         ring->next_to_clean = 0;
 287
 288         snprintf(ring->irq_name, sizeof(ring->irq_name),
 289                  "%s tx", dev->name);
 290         mac->tx = ring;
 291
 292         return 0;
 293
 294 out_desc:
 295         kfree(ring->desc_info);
 296 out_desc_info:
 297         kfree(ring);
 298 out_ring:
 299         return -ENOMEM;
 300 }
 301
 302 static void pasemi_mac_free_tx_resources(struct net_device *dev)
 303 {
 304         struct pasemi_mac *mac = netdev_priv(dev);
 305         unsigned int i;
 306         struct pasemi_mac_buffer *info;
 307         struct pas_dma_xct_descr *dp;
 308
 309         for (i = 0; i < TX_RING_SIZE; i++) {
 310                 info = &TX_DESC_INFO(mac, i);
 311                 dp = &TX_DESC(mac, i);
 312                 if (info->dma) {
 313                         if (info->skb) {
 314                                 pci_unmap_single(mac->dma_pdev,
 315                                                  info->dma,
 316                                                  info->skb->len,
 317                                                  PCI_DMA_TODEVICE);
 318                                 dev_kfree_skb_any(info->skb);
 319                         }
 320                         info->dma = 0;
 321                         info->skb = NULL;
 322                         dp->mactx = 0;
 323                         dp->ptr = 0;
 324                 }
 325         }
 326
 327         dma_free_coherent(&mac->dma_pdev->dev,
 328                           TX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 329                           mac->tx->desc, mac->tx->dma);
 330
 331         kfree(mac->tx->desc_info);
 332         kfree(mac->tx);
 333         mac->tx = NULL;
 334 }
 335
 336 static void pasemi_mac_free_rx_resources(struct net_device *dev)
 337 {
 338         struct pasemi_mac *mac = netdev_priv(dev);
 339         unsigned int i;
 340         struct pasemi_mac_buffer *info;
 341         struct pas_dma_xct_descr *dp;
 342
 343         for (i = 0; i < RX_RING_SIZE; i++) {
 344                 info = &RX_DESC_INFO(mac, i);
 345                 dp = &RX_DESC(mac, i);
 346                 if (info->skb) {
 347                         if (info->dma) {
 348                                 pci_unmap_single(mac->dma_pdev,
 349                                                  info->dma,
 350                                                  info->skb->len,
 351                                                  PCI_DMA_FROMDEVICE);
 352                                 dev_kfree_skb_any(info->skb);
 353                         }
 354                         info->dma = 0;
 355                         info->skb = NULL;
 356                         dp->macrx = 0;
 357                         dp->ptr = 0;
 358                 }
 359         }
 360
 361         dma_free_coherent(&mac->dma_pdev->dev,
 362                           RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
 363                           mac->rx->desc, mac->rx->dma);
 364
 365         dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
 366                           mac->rx->buffers, mac->rx->buf_dma);
 367
 368         kfree(mac->rx->desc_info);
 369         kfree(mac->rx);
 370         mac->rx = NULL;
 371 }
 372
 373 static void pasemi_mac_replenish_rx_ring(struct net_device *dev, int limit)
 374 {
 375         struct pasemi_mac *mac = netdev_priv(dev);
 376         unsigned int i;
 377         int start = mac->rx->next_to_fill;
 378         int count;
 379
 380         if (limit <= 0)
 381                 return;
 382
 383         i = start;
 384         for (count = 0; count < limit; count++) {
 385                 struct pasemi_mac_buffer *info = &RX_DESC_INFO(mac, i);
 386                 u64 *buff = &RX_BUFF(mac, i);
 387                 struct sk_buff *skb;
 388                 dma_addr_t dma;
 389
 390                 /* skb might still be in there for recycle on short receives */
 391                 if (info->skb)
 392                         skb = info->skb;
 393                 else
 394                         skb = dev_alloc_skb(BUF_SIZE);
 395
 396                 if (unlikely(!skb))
 397                         break;
 398
 399                 dma = pci_map_single(mac->dma_pdev, skb->data, BUF_SIZE,
 400                                      PCI_DMA_FROMDEVICE);
 401
 402                 if (unlikely(dma_mapping_error(dma))) {
 403                         dev_kfree_skb_irq(info->skb);
 404                         break;
 405                 }
 406
 407                 info->skb = skb;
 408                 info->dma = dma;
 409                 *buff = XCT_RXB_LEN(BUF_SIZE) | XCT_RXB_ADDR(dma);
 410                 i++;
 411         }
 412
 413         wmb();
 414
 415         write_dma_reg(mac, PAS_DMA_RXCHAN_INCR(mac->dma_rxch), count);
 416         write_dma_reg(mac, PAS_DMA_RXINT_INCR(mac->dma_if), count);
 417
 418         mac->rx->next_to_fill += count;
 419 }
 420
 421 static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac)
 422 {
 423         unsigned int reg, pcnt;
 424         /* Re-enable packet count interrupts: finally
 425          * ack the packet count interrupt we got in rx_intr.
 426          */
 427
 428         pcnt = *mac->rx_status & PAS_STATUS_PCNT_M;
 429
 430         reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC;
 431
 432         write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
 433 }
 434
 435 static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
 436 {
 437         unsigned int reg, pcnt;
 438
 439         /* Re-enable packet count interrupts */
 440         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
 441
 442         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
 443
 444         write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
 445 }
 446
 447
 448 static inline void pasemi_mac_rx_error(struct pasemi_mac *mac, u64 macrx)
 449 {
 450         unsigned int rcmdsta, ccmdsta;
 451
 452         if (!netif_msg_rx_err(mac))
 453                 return;
 454
 455         rcmdsta = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
 456         ccmdsta = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch));
 457
 458         printk(KERN_ERR "pasemi_mac: rx error. macrx %016lx, rx status %lx\n",
 459                 macrx, *mac->rx_status);
 460
 461         printk(KERN_ERR "pasemi_mac: rcmdsta %08x ccmdsta %08x\n",
 462                 rcmdsta, ccmdsta);
 463 }
 464
 465 static inline void pasemi_mac_tx_error(struct pasemi_mac *mac, u64 mactx)
 466 {
 467         unsigned int cmdsta;
 468
 469         if (!netif_msg_tx_err(mac))
 470                 return;
 471
 472         cmdsta = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch));
 473
 474         printk(KERN_ERR "pasemi_mac: tx error. mactx 0x%016lx, "\
 475                 "tx status 0x%016lx\n", mactx, *mac->tx_status);
 476
 477         printk(KERN_ERR "pasemi_mac: tcmdsta 0x%08x\n", cmdsta);
 478 }
 479
 480 static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
 481 {
 482         unsigned int n;
 483         int count;
 484         struct pas_dma_xct_descr *dp;
 485         struct pasemi_mac_buffer *info;
 486         struct sk_buff *skb;
 487         unsigned int i, len;
 488         u64 macrx;
 489         dma_addr_t dma;
 490
 491         spin_lock(&mac->rx->lock);
 492
 493         n = mac->rx->next_to_clean;
 494
 495         for (count = limit; count; count--) {
 496
 497                 rmb();
 498
 499                 dp = &RX_DESC(mac, n);
 500                 prefetchw(dp);
 501                 macrx = dp->macrx;
 502
 503                 if ((macrx & XCT_MACRX_E) ||
 504                     (*mac->rx_status & PAS_STATUS_ERROR))
 505                         pasemi_mac_rx_error(mac, macrx);
 506
 507                 if (!(macrx & XCT_MACRX_O))
 508                         break;
 509
 510                 info = NULL;
 511
 512                 /* We have to scan for our skb since there's no way
 513                  * to back-map them from the descriptor, and if we
 514                  * have several receive channels then they might not
 515                  * show up in the same order as they were put on the
 516                  * interface ring.
 517                  */
 518
 519                 dma = (dp->ptr & XCT_PTR_ADDR_M);
 520                 for (i = n; i < (n + RX_RING_SIZE); i++) {
 521                         info = &RX_DESC_INFO(mac, i);
 522                         if (info->dma == dma)
 523                                 break;
 524                 }
 525                 prefetchw(info);
 526
 527                 skb = info->skb;
 528                 prefetchw(skb);
 529                 info->dma = 0;
 530
 531                 pci_unmap_single(mac->dma_pdev, dma, skb->len,
 532                                  PCI_DMA_FROMDEVICE);
 533
 534                 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
 535
 536                 if (len < 256) {
 537                         struct sk_buff *new_skb =
 538                             netdev_alloc_skb(mac->netdev, len + NET_IP_ALIGN);
 539                         if (new_skb) {
 540                                 skb_reserve(new_skb, NET_IP_ALIGN);
 541                                 memcpy(new_skb->data, skb->data, len);
 542                                 /* save the skb in buffer_info as good */
 543                                 skb = new_skb;
 544                         }
 545                         /* else just continue with the old one */
 546                 } else
 547                         info->skb = NULL;
 548
 549                 skb_put(skb, len);
 550
 551                 if (likely((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK)) {
 552                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 553                         skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
 554                                            XCT_MACRX_CSUM_S;
 555                 } else
 556                         skb->ip_summed = CHECKSUM_NONE;
 557
 558                 mac->netdev->stats.rx_bytes += len;
 559                 mac->netdev->stats.rx_packets++;
 560
 561                 skb->protocol = eth_type_trans(skb, mac->netdev);
 562                 netif_receive_skb(skb);
 563
 564                 dp->ptr = 0;
 565                 dp->macrx = 0;
 566
 567                 n++;
 568         }
 569
 570         mac->rx->next_to_clean += limit - count;
 571         pasemi_mac_replenish_rx_ring(mac->netdev, limit-count);
 572
 573         spin_unlock(&mac->rx->lock);
 574
 575         return count;
 576 }
 577
 578 static int pasemi_mac_clean_tx(struct pasemi_mac *mac)
 579 {
 580         int i;
 581         struct pasemi_mac_buffer *info;
 582         struct pas_dma_xct_descr *dp;
 583         unsigned int start, count, limit;
 584         unsigned int total_count;
 585         unsigned long flags;
 586         struct sk_buff *skbs[32];
 587         dma_addr_t dmas[32];
 588
 589         total_count = 0;
 590 restart:
 591         spin_lock_irqsave(&mac->tx->lock, flags);
 592
 593         start = mac->tx->next_to_clean;
 594         limit = min(mac->tx->next_to_fill, start+32);
 595
 596         count = 0;
 597
 598         for (i = start; i < limit; i++) {
 599                 dp = &TX_DESC(mac, i);
 600
 601                 if ((dp->mactx & XCT_MACTX_E) ||
 602                     (*mac->tx_status & PAS_STATUS_ERROR))
 603                         pasemi_mac_tx_error(mac, dp->mactx);
 604
 605                 if (unlikely(dp->mactx & XCT_MACTX_O))
 606                         /* Not yet transmitted */
 607                         break;
 608
 609                 info = &TX_DESC_INFO(mac, i);
 610                 skbs[count] = info->skb;
 611                 dmas[count] = info->dma;
 612
 613                 info->skb = NULL;
 614                 info->dma = 0;
 615                 dp->mactx = 0;
 616                 dp->ptr = 0;
 617
 618                 count++;
 619         }
 620         mac->tx->next_to_clean += count;
 621         spin_unlock_irqrestore(&mac->tx->lock, flags);
 622         netif_wake_queue(mac->netdev);
 623
 624         for (i = 0; i < count; i++) {
 625                 pci_unmap_single(mac->dma_pdev, dmas[i],
 626                                  skbs[i]->len, PCI_DMA_TODEVICE);
 627                 dev_kfree_skb_irq(skbs[i]);
 628         }
 629
 630         total_count += count;
 631
 632         /* If the batch was full, try to clean more */
 633         if (count == 32)
 634                 goto restart;
 635
 636         return total_count;
 637 }
 638
 639
 640 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
 641 {
 642         struct net_device *dev = data;
 643         struct pasemi_mac *mac = netdev_priv(dev);
 644         unsigned int reg;
 645
 646         if (!(*mac->rx_status & PAS_STATUS_CAUSE_M))
 647                 return IRQ_NONE;
 648
 649         /* Don't reset packet count so it won't fire again but clear
 650          * all others.
 651          */
 652
 653         reg = 0;
 654         if (*mac->rx_status & PAS_STATUS_SOFT)
 655                 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
 656         if (*mac->rx_status & PAS_STATUS_ERROR)
 657                 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
 658         if (*mac->rx_status & PAS_STATUS_TIMER)
 659                 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
 660
 661         netif_rx_schedule(dev, &mac->napi);
 662
 663         write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
 664
 665         return IRQ_HANDLED;
 666 }
 667
 668 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
 669 {
 670         struct net_device *dev = data;
 671         struct pasemi_mac *mac = netdev_priv(dev);
 672         unsigned int reg, pcnt;
 673
 674         if (!(*mac->tx_status & PAS_STATUS_CAUSE_M))
 675                 return IRQ_NONE;
 676
 677         pasemi_mac_clean_tx(mac);
 678
 679         pcnt = *mac->tx_status & PAS_STATUS_PCNT_M;
 680
 681         reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
 682
 683         if (*mac->tx_status & PAS_STATUS_SOFT)
 684                 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
 685         if (*mac->tx_status & PAS_STATUS_ERROR)
 686                 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
 687
 688         write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
 689
 690         return IRQ_HANDLED;
 691 }
 692
 693 static void pasemi_adjust_link(struct net_device *dev)
 694 {
 695         struct pasemi_mac *mac = netdev_priv(dev);
 696         int msg;
 697         unsigned int flags;
 698         unsigned int new_flags;
 699
 700         if (!mac->phydev->link) {
 701                 /* If no link, MAC speed settings don't matter. Just report
 702                  * link down and return.
 703                  */
 704                 if (mac->link && netif_msg_link(mac))
 705                         printk(KERN_INFO "%s: Link is down.\n", dev->name);
 706
 707                 netif_carrier_off(dev);
 708                 mac->link = 0;
 709
 710                 return;
 711         } else
 712                 netif_carrier_on(dev);
 713
 714         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
 715         new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
 716                               PAS_MAC_CFG_PCFG_TSR_M);
 717
 718         if (!mac->phydev->duplex)
 719                 new_flags |= PAS_MAC_CFG_PCFG_HD;
 720
 721         switch (mac->phydev->speed) {
 722         case 1000:
 723                 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
 724                              PAS_MAC_CFG_PCFG_TSR_1G;
 725                 break;
 726         case 100:
 727                 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
 728                              PAS_MAC_CFG_PCFG_TSR_100M;
 729                 break;
 730         case 10:
 731                 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
 732                              PAS_MAC_CFG_PCFG_TSR_10M;
 733                 break;
 734         default:
 735                 printk("Unsupported speed %d\n", mac->phydev->speed);
 736         }
 737
 738         /* Print on link or speed/duplex change */
 739         msg = mac->link != mac->phydev->link || flags != new_flags;
 740
 741         mac->duplex = mac->phydev->duplex;
 742         mac->speed = mac->phydev->speed;
 743         mac->link = mac->phydev->link;
 744
 745         if (new_flags != flags)
 746                 write_mac_reg(mac, PAS_MAC_CFG_PCFG, new_flags);
 747
 748         if (msg && netif_msg_link(mac))
 749                 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
 750                        dev->name, mac->speed, mac->duplex ? "full" : "half");
 751 }
 752
 753 static int pasemi_mac_phy_init(struct net_device *dev)
 754 {
 755         struct pasemi_mac *mac = netdev_priv(dev);
 756         struct device_node *dn, *phy_dn;
 757         struct phy_device *phydev;
 758         unsigned int phy_id;
 759         const phandle *ph;
 760         const unsigned int *prop;
 761         struct resource r;
 762         int ret;
 763
 764         dn = pci_device_to_OF_node(mac->pdev);
 765         ph = of_get_property(dn, "phy-handle", NULL);
 766         if (!ph)
 767                 return -ENODEV;
 768         phy_dn = of_find_node_by_phandle(*ph);
 769
 770         prop = of_get_property(phy_dn, "reg", NULL);
 771         ret = of_address_to_resource(phy_dn->parent, 0, &r);
 772         if (ret)
 773                 goto err;
 774
 775         phy_id = *prop;
 776         snprintf(mac->phy_id, BUS_ID_SIZE, PHY_ID_FMT, (int)r.start, phy_id);
 777
 778         of_node_put(phy_dn);
 779
 780         mac->link = 0;
 781         mac->speed = 0;
 782         mac->duplex = -1;
 783
 784         phydev = phy_connect(dev, mac->phy_id, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
 785
 786         if (IS_ERR(phydev)) {
 787                 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
 788                 return PTR_ERR(phydev);
 789         }
 790
 791         mac->phydev = phydev;
 792
 793         return 0;
 794
 795 err:
 796         of_node_put(phy_dn);
 797         return -ENODEV;
 798 }
 799
 800
 801 static int pasemi_mac_open(struct net_device *dev)
 802 {
 803         struct pasemi_mac *mac = netdev_priv(dev);
 804         int base_irq;
 805         unsigned int flags;
 806         int ret;
 807
 808         /* enable rx section */
 809         write_dma_reg(mac, PAS_DMA_COM_RXCMD, PAS_DMA_COM_RXCMD_EN);
 810
 811         /* enable tx section */
 812         write_dma_reg(mac, PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN);
 813
 814         flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
 815                 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
 816                 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
 817
 818         write_mac_reg(mac, PAS_MAC_CFG_TXP, flags);
 819
 820         write_iob_reg(mac, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
 821                            PAS_IOB_DMA_RXCH_CFG_CNTTH(0));
 822
 823         write_iob_reg(mac, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch),
 824                            PAS_IOB_DMA_TXCH_CFG_CNTTH(128));
 825
 826         /* Clear out any residual packet count state from firmware */
 827         pasemi_mac_restart_rx_intr(mac);
 828         pasemi_mac_restart_tx_intr(mac);
 829
 830         /* 0xffffff is max value, about 16ms */
 831         write_iob_reg(mac, PAS_IOB_DMA_COM_TIMEOUTCFG,
 832                            PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
 833
 834         ret = pasemi_mac_setup_rx_resources(dev);
 835         if (ret)
 836                 goto out_rx_resources;
 837
 838         ret = pasemi_mac_setup_tx_resources(dev);
 839         if (ret)
 840                 goto out_tx_resources;
 841
 842         write_mac_reg(mac, PAS_MAC_IPC_CHNL,
 843                            PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) |
 844                            PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch));
 845
 846         /* enable rx if */
 847         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
 848                            PAS_DMA_RXINT_RCMDSTA_EN);
 849
 850         /* enable rx channel */
 851         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
 852                            PAS_DMA_RXCHAN_CCMDSTA_EN |
 853                            PAS_DMA_RXCHAN_CCMDSTA_DU);
 854
 855         /* enable tx channel */
 856         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
 857                            PAS_DMA_TXCHAN_TCMDSTA_EN);
 858
 859         pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE);
 860
 861         flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
 862                 PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
 863
 864         if (mac->type == MAC_TYPE_GMAC)
 865                 flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
 866         else
 867                 flags |= PAS_MAC_CFG_PCFG_TSR_10G | PAS_MAC_CFG_PCFG_SPD_10G;
 868
 869         /* Enable interface in MAC */
 870         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
 871
 872         ret = pasemi_mac_phy_init(dev);
 873         /* Some configs don't have PHYs (XAUI etc), so don't complain about
 874          * failed init due to -ENODEV.
 875          */
 876         if (ret && ret != -ENODEV)
 877                 dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
 878
 879         netif_start_queue(dev);
 880         napi_enable(&mac->napi);
 881
 882         /* Interrupts are a bit different for our DMA controller: While
 883          * it's got one a regular PCI device header, the interrupt there
 884          * is really the base of the range it's using. Each tx and rx
 885          * channel has it's own interrupt source.
 886          */
 887
 888         base_irq = virq_to_hw(mac->dma_pdev->irq);
 889
 890         mac->tx_irq = irq_create_mapping(NULL, base_irq + mac->dma_txch);
 891         mac->rx_irq = irq_create_mapping(NULL, base_irq + 20 + mac->dma_txch);
 892
 893         ret = request_irq(mac->tx_irq, &pasemi_mac_tx_intr, IRQF_DISABLED,
 894                           mac->tx->irq_name, dev);
 895         if (ret) {
 896                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 897                         base_irq + mac->dma_txch, ret);
 898                 goto out_tx_int;
 899         }
 900
 901         ret = request_irq(mac->rx_irq, &pasemi_mac_rx_intr, IRQF_DISABLED,
 902                           mac->rx->irq_name, dev);
 903         if (ret) {
 904                 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
 905                         base_irq + 20 + mac->dma_rxch, ret);
 906                 goto out_rx_int;
 907         }
 908
 909         if (mac->phydev)
 910                 phy_start(mac->phydev);
 911
 912         return 0;
 913
 914 out_rx_int:
 915         free_irq(mac->tx_irq, dev);
 916 out_tx_int:
 917         napi_disable(&mac->napi);
 918         netif_stop_queue(dev);
 919         pasemi_mac_free_tx_resources(dev);
 920 out_tx_resources:
 921         pasemi_mac_free_rx_resources(dev);
 922 out_rx_resources:
 923
 924         return ret;
 925 }
 926
 927 #define MAX_RETRIES 5000
 928
 929 static int pasemi_mac_close(struct net_device *dev)
 930 {
 931         struct pasemi_mac *mac = netdev_priv(dev);
 932         unsigned int stat;
 933         int retries;
 934
 935         if (mac->phydev) {
 936                 phy_stop(mac->phydev);
 937                 phy_disconnect(mac->phydev);
 938         }
 939
 940         netif_stop_queue(dev);
 941         napi_disable(&mac->napi);
 942
 943         /* Clean out any pending buffers */
 944         pasemi_mac_clean_tx(mac);
 945         pasemi_mac_clean_rx(mac, RX_RING_SIZE);
 946
 947         /* Disable interface */
 948         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), PAS_DMA_TXCHAN_TCMDSTA_ST);
 949         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), PAS_DMA_RXINT_RCMDSTA_ST);
 950         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), PAS_DMA_RXCHAN_CCMDSTA_ST);
 951
 952         for (retries = 0; retries < MAX_RETRIES; retries++) {
 953                 stat = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch));
 954                 if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT))
 955                         break;
 956                 cond_resched();
 957         }
 958
 959         if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)
 960                 dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel\n");
 961
 962         for (retries = 0; retries < MAX_RETRIES; retries++) {
 963                 stat = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch));
 964                 if (!(stat & PAS_DMA_RXCHAN_CCMDSTA_ACT))
 965                         break;
 966                 cond_resched();
 967         }
 968
 969         if (stat & PAS_DMA_RXCHAN_CCMDSTA_ACT)
 970                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx channel\n");
 971
 972         for (retries = 0; retries < MAX_RETRIES; retries++) {
 973                 stat = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
 974                 if (!(stat & PAS_DMA_RXINT_RCMDSTA_ACT))
 975                         break;
 976                 cond_resched();
 977         }
 978
 979         if (stat & PAS_DMA_RXINT_RCMDSTA_ACT)
 980                 dev_err(&mac->dma_pdev->dev, "Failed to stop rx interface\n");
 981
 982         /* Then, disable the channel. This must be done separately from
 983          * stopping, since you can't disable when active.
 984          */
 985
 986         write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0);
 987         write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0);
 988         write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
 989
 990         free_irq(mac->tx_irq, dev);
 991         free_irq(mac->rx_irq, dev);
 992
 993         /* Free resources */
 994         pasemi_mac_free_rx_resources(dev);
 995         pasemi_mac_free_tx_resources(dev);
 996
 997         return 0;
 998 }
 999
1000 static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
1001 {
1002         struct pasemi_mac *mac = netdev_priv(dev);
1003         struct pasemi_mac_txring *txring;
1004         struct pasemi_mac_buffer *info;
1005         struct pas_dma_xct_descr *dp;
1006         u64 dflags, mactx, ptr;
1007         dma_addr_t map;
1008         unsigned long flags;
1009
1010         dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_SS | XCT_MACTX_CRC_PAD;
1011
1012         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1013                 const unsigned char *nh = skb_network_header(skb);
1014
1015                 switch (ip_hdr(skb)->protocol) {
1016                 case IPPROTO_TCP:
1017                         dflags |= XCT_MACTX_CSUM_TCP;
1018                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
1019                         dflags |= XCT_MACTX_IPO(nh - skb->data);
1020                         break;
1021                 case IPPROTO_UDP:
1022                         dflags |= XCT_MACTX_CSUM_UDP;
1023                         dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
1024                         dflags |= XCT_MACTX_IPO(nh - skb->data);
1025                         break;
1026                 }
1027         }
1028
1029         map = pci_map_single(mac->dma_pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
1030
1031         if (dma_mapping_error(map))
1032                 return NETDEV_TX_BUSY;
1033
1034         mactx = dflags | XCT_MACTX_LLEN(skb->len);
1035         ptr   = XCT_PTR_LEN(skb->len) | XCT_PTR_ADDR(map);
1036
1037         txring = mac->tx;
1038
1039         spin_lock_irqsave(&txring->lock, flags);
1040
1041         if (RING_AVAIL(txring) <= 1) {
1042                 spin_unlock_irqrestore(&txring->lock, flags);
1043                 pasemi_mac_clean_tx(mac);
1044                 pasemi_mac_restart_tx_intr(mac);
1045                 spin_lock_irqsave(&txring->lock, flags);
1046
1047                 if (RING_AVAIL(txring) <= 1) {
1048                         /* Still no room -- stop the queue and wait for tx
1049                          * intr when there's room.
1050                          */
1051                         netif_stop_queue(dev);
1052                         goto out_err;
1053                 }
1054         }
1055
1056         dp = &TX_DESC(mac, txring->next_to_fill);
1057         info = &TX_DESC_INFO(mac, txring->next_to_fill);
1058
1059         dp->mactx = mactx;
1060         dp->ptr   = ptr;
1061         info->dma = map;
1062         info->skb = skb;
1063
1064         txring->next_to_fill++;
1065         dev->stats.tx_packets++;
1066         dev->stats.tx_bytes += skb->len;
1067
1068         spin_unlock_irqrestore(&txring->lock, flags);
1069
1070         write_dma_reg(mac, PAS_DMA_TXCHAN_INCR(mac->dma_txch), 1);
1071
1072         return NETDEV_TX_OK;
1073
1074 out_err:
1075         spin_unlock_irqrestore(&txring->lock, flags);
1076         pci_unmap_single(mac->dma_pdev, map, skb->len, PCI_DMA_TODEVICE);
1077         return NETDEV_TX_BUSY;
1078 }
1079
1080 static void pasemi_mac_set_rx_mode(struct net_device *dev)
1081 {
1082         struct pasemi_mac *mac = netdev_priv(dev);
1083         unsigned int flags;
1084
1085         flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
1086
1087         /* Set promiscuous */
1088         if (dev->flags & IFF_PROMISC)
1089                 flags |= PAS_MAC_CFG_PCFG_PR;
1090         else
1091                 flags &= ~PAS_MAC_CFG_PCFG_PR;
1092
1093         write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
1094 }
1095
1096
1097 static int pasemi_mac_poll(struct napi_struct *napi, int budget)
1098 {
1099         struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi);
1100         struct net_device *dev = mac->netdev;
1101         int pkts;
1102
1103         pasemi_mac_clean_tx(mac);
1104         pkts = pasemi_mac_clean_rx(mac, budget);
1105         if (pkts < budget) {
1106                 /* all done, no more packets present */
1107                 netif_rx_complete(dev, napi);
1108
1109                 pasemi_mac_restart_rx_intr(mac);
1110         }
1111         return pkts;
1112 }
1113
1114 static void __iomem * __devinit map_onedev(struct pci_dev *p, int index)
1115 {
1116         struct device_node *dn;
1117         void __iomem *ret;
1118
1119         dn = pci_device_to_OF_node(p);
1120         if (!dn)
1121                 goto fallback;
1122
1123         ret = of_iomap(dn, index);
1124         if (!ret)
1125                 goto fallback;
1126
1127         return ret;
1128 fallback:
1129         /* This is hardcoded and ugly, but we have some firmware versions
1130          * that don't provide the register space in the device tree. Luckily
1131          * they are at well-known locations so we can just do the math here.
1132          */
1133         return ioremap(0xe0000000 + (p->devfn << 12), 0x2000);
1134 }
1135
1136 static int __devinit pasemi_mac_map_regs(struct pasemi_mac *mac)
1137 {
1138         struct resource res;
1139         struct device_node *dn;
1140         int err;
1141
1142         mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1143         if (!mac->dma_pdev) {
1144                 dev_err(&mac->pdev->dev, "Can't find DMA Controller\n");
1145                 return -ENODEV;
1146         }
1147
1148         mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1149         if (!mac->iob_pdev) {
1150                 dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n");
1151                 return -ENODEV;
1152         }
1153
1154         mac->regs = map_onedev(mac->pdev, 0);
1155         mac->dma_regs = map_onedev(mac->dma_pdev, 0);
1156         mac->iob_regs = map_onedev(mac->iob_pdev, 0);
1157
1158         if (!mac->regs || !mac->dma_regs || !mac->iob_regs) {
1159                 dev_err(&mac->pdev->dev, "Can't map registers\n");
1160                 return -ENODEV;
1161         }
1162
1163         /* The dma status structure is located in the I/O bridge, and
1164          * is cache coherent.
1165          */
1166         if (!dma_status) {
1167                 dn = pci_device_to_OF_node(mac->iob_pdev);
1168                 if (dn)
1169                         err = of_address_to_resource(dn, 1, &res);
1170                 if (!dn || err) {
1171                         /* Fallback for old firmware */
1172                         res.start = 0xfd800000;
1173                         res.end = res.start + 0x1000;
1174                 }
1175                 dma_status = __ioremap(res.start, res.end-res.start, 0);
1176         }
1177
1178         return 0;
1179 }
1180
1181 static int __devinit
1182 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1183 {
1184         static int index = 0;
1185         struct net_device *dev;
1186         struct pasemi_mac *mac;
1187         int err;
1188         DECLARE_MAC_BUF(mac_buf);
1189
1190         err = pci_enable_device(pdev);
1191         if (err)
1192                 return err;
1193
1194         dev = alloc_etherdev(sizeof(struct pasemi_mac));
1195         if (dev == NULL) {
1196                 dev_err(&pdev->dev,
1197                         "pasemi_mac: Could not allocate ethernet device.\n");
1198                 err = -ENOMEM;
1199                 goto out_disable_device;
1200         }
1201
1202         pci_set_drvdata(pdev, dev);
1203         SET_NETDEV_DEV(dev, &pdev->dev);
1204
1205         mac = netdev_priv(dev);
1206
1207         mac->pdev = pdev;
1208         mac->netdev = dev;
1209
1210         netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64);
1211
1212         dev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
1213
1214         /* These should come out of the device tree eventually */
1215         mac->dma_txch = index;
1216         mac->dma_rxch = index;
1217
1218         /* We probe GMAC before XAUI, but the DMA interfaces are
1219          * in XAUI, GMAC order.
1220          */
1221         if (index < 4)
1222                 mac->dma_if = index + 2;
1223         else
1224                 mac->dma_if = index - 4;
1225         index++;
1226
1227         switch (pdev->device) {
1228         case 0xa005:
1229                 mac->type = MAC_TYPE_GMAC;
1230                 break;
1231         case 0xa006:
1232                 mac->type = MAC_TYPE_XAUI;
1233                 break;
1234         default:
1235                 err = -ENODEV;
1236                 goto out;
1237         }
1238
1239         /* get mac addr from device tree */
1240         if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1241                 err = -ENODEV;
1242                 goto out;
1243         }
1244         memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr));
1245
1246         dev->open = pasemi_mac_open;
1247         dev->stop = pasemi_mac_close;
1248         dev->hard_start_xmit = pasemi_mac_start_tx;
1249         dev->set_multicast_list = pasemi_mac_set_rx_mode;
1250
1251         err = pasemi_mac_map_regs(mac);
1252         if (err)
1253                 goto out;
1254
1255         mac->rx_status = &dma_status->rx_sta[mac->dma_rxch];
1256         mac->tx_status = &dma_status->tx_sta[mac->dma_txch];
1257
1258         mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1259
1260         /* Enable most messages by default */
1261         mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1262
1263         err = register_netdev(dev);
1264
1265         if (err) {
1266                 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1267                         err);
1268                 goto out;
1269         } else if netif_msg_probe(mac)
1270                 printk(KERN_INFO "%s: PA Semi %s: intf %d, txch %d, rxch %d, "
1271                        "hw addr %s\n",
1272                        dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
1273                        mac->dma_if, mac->dma_txch, mac->dma_rxch,
1274                        print_mac(mac_buf, dev->dev_addr));
1275
1276         return err;
1277
1278 out:
1279         if (mac->iob_pdev)
1280                 pci_dev_put(mac->iob_pdev);
1281         if (mac->dma_pdev)
1282                 pci_dev_put(mac->dma_pdev);
1283         if (mac->dma_regs)
1284                 iounmap(mac->dma_regs);
1285         if (mac->iob_regs)
1286                 iounmap(mac->iob_regs);
1287         if (mac->regs)
1288                 iounmap(mac->regs);
1289
1290         free_netdev(dev);
1291 out_disable_device:
1292         pci_disable_device(pdev);
1293         return err;
1294
1295 }
1296
1297 static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
1298 {
1299         struct net_device *netdev = pci_get_drvdata(pdev);
1300         struct pasemi_mac *mac;
1301
1302         if (!netdev)
1303                 return;
1304
1305         mac = netdev_priv(netdev);
1306
1307         unregister_netdev(netdev);
1308
1309         pci_disable_device(pdev);
1310         pci_dev_put(mac->dma_pdev);
1311         pci_dev_put(mac->iob_pdev);
1312
1313         iounmap(mac->regs);
1314         iounmap(mac->dma_regs);
1315         iounmap(mac->iob_regs);
1316
1317         pci_set_drvdata(pdev, NULL);
1318         free_netdev(netdev);
1319 }
1320
1321 static struct pci_device_id pasemi_mac_pci_tbl[] = {
1322         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1323         { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
1324         { },
1325 };
1326
1327 MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl);
1328
1329 static struct pci_driver pasemi_mac_driver = {
1330         .name           = "pasemi_mac",
1331         .id_table       = pasemi_mac_pci_tbl,
1332         .probe          = pasemi_mac_probe,
1333         .remove         = __devexit_p(pasemi_mac_remove),
1334 };
1335
1336 static void __exit pasemi_mac_cleanup_module(void)
1337 {
1338         pci_unregister_driver(&pasemi_mac_driver);
1339         __iounmap(dma_status);
1340         dma_status = NULL;
1341 }
1342
1343 int pasemi_mac_init_module(void)
1344 {
1345         return pci_register_driver(&pasemi_mac_driver);
1346 }
1347
1348 module_init(pasemi_mac_init_module);
1349 module_exit(pasemi_mac_cleanup_module);