drivers/net/qlge/qlge_main.c

   1 /*
   2  * QLogic qlge NIC HBA Driver
   3  * Copyright (c)  2003-2008 QLogic Corporation
   4  * See LICENSE.qlge for copyright and licensing details.
   5  * Author:     Linux qlge network device driver by
   6  *                      Ron Mercer <ron.mercer@qlogic.com>
   7  */
   8 #include <linux/kernel.h>
   9 #include <linux/init.h>
  10 #include <linux/types.h>
  11 #include <linux/module.h>
  12 #include <linux/list.h>
  13 #include <linux/pci.h>
  14 #include <linux/dma-mapping.h>
  15 #include <linux/pagemap.h>
  16 #include <linux/sched.h>
  17 #include <linux/slab.h>
  18 #include <linux/dmapool.h>
  19 #include <linux/mempool.h>
  20 #include <linux/spinlock.h>
  21 #include <linux/kthread.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/errno.h>
  24 #include <linux/ioport.h>
  25 #include <linux/in.h>
  26 #include <linux/ip.h>
  27 #include <linux/ipv6.h>
  28 #include <net/ipv6.h>
  29 #include <linux/tcp.h>
  30 #include <linux/udp.h>
  31 #include <linux/if_arp.h>
  32 #include <linux/if_ether.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/etherdevice.h>
  35 #include <linux/ethtool.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/rtnetlink.h>
  38 #include <linux/if_vlan.h>
  39 #include <linux/delay.h>
  40 #include <linux/mm.h>
  41 #include <linux/vmalloc.h>
  42 #include <net/ip6_checksum.h>
  43
  44 #include "qlge.h"
  45
  46 char qlge_driver_name[] = DRV_NAME;
  47 const char qlge_driver_version[] = DRV_VERSION;
  48
  49 MODULE_AUTHOR("Ron Mercer <ron.mercer@qlogic.com>");
  50 MODULE_DESCRIPTION(DRV_STRING " ");
  51 MODULE_LICENSE("GPL");
  52 MODULE_VERSION(DRV_VERSION);
  53
  54 static const u32 default_msg =
  55     NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK |
  56 /* NETIF_MSG_TIMER |    */
  57     NETIF_MSG_IFDOWN |
  58     NETIF_MSG_IFUP |
  59     NETIF_MSG_RX_ERR |
  60     NETIF_MSG_TX_ERR |
  61     NETIF_MSG_TX_QUEUED |
  62     NETIF_MSG_INTR | NETIF_MSG_TX_DONE | NETIF_MSG_RX_STATUS |
  63 /* NETIF_MSG_PKTDATA | */
  64     NETIF_MSG_HW | NETIF_MSG_WOL | 0;
  65
  66 static int debug = 0x00007fff;  /* defaults above */
  67 module_param(debug, int, 0);
  68 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  69
  70 #define MSIX_IRQ 0
  71 #define MSI_IRQ 1
  72 #define LEG_IRQ 2
  73 static int irq_type = MSIX_IRQ;
  74 module_param(irq_type, int, MSIX_IRQ);
  75 MODULE_PARM_DESC(irq_type, "0 = MSI-X, 1 = MSI, 2 = Legacy.");
  76
  77 static struct pci_device_id qlge_pci_tbl[] __devinitdata = {
  78         {PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, QLGE_DEVICE_ID)},
  79         {PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, QLGE_DEVICE_ID1)},
  80         /* required last entry */
  81         {0,}
  82 };
  83
  84 MODULE_DEVICE_TABLE(pci, qlge_pci_tbl);
  85
  86 /* This hardware semaphore causes exclusive access to
  87  * resources shared between the NIC driver, MPI firmware,
  88  * FCOE firmware and the FC driver.
  89  */
  90 static int ql_sem_trylock(struct ql_adapter *qdev, u32 sem_mask)
  91 {
  92         u32 sem_bits = 0;
  93
  94         switch (sem_mask) {
  95         case SEM_XGMAC0_MASK:
  96                 sem_bits = SEM_SET << SEM_XGMAC0_SHIFT;
  97                 break;
  98         case SEM_XGMAC1_MASK:
  99                 sem_bits = SEM_SET << SEM_XGMAC1_SHIFT;
 100                 break;
 101         case SEM_ICB_MASK:
 102                 sem_bits = SEM_SET << SEM_ICB_SHIFT;
 103                 break;
 104         case SEM_MAC_ADDR_MASK:
 105                 sem_bits = SEM_SET << SEM_MAC_ADDR_SHIFT;
 106                 break;
 107         case SEM_FLASH_MASK:
 108                 sem_bits = SEM_SET << SEM_FLASH_SHIFT;
 109                 break;
 110         case SEM_PROBE_MASK:
 111                 sem_bits = SEM_SET << SEM_PROBE_SHIFT;
 112                 break;
 113         case SEM_RT_IDX_MASK:
 114                 sem_bits = SEM_SET << SEM_RT_IDX_SHIFT;
 115                 break;
 116         case SEM_PROC_REG_MASK:
 117                 sem_bits = SEM_SET << SEM_PROC_REG_SHIFT;
 118                 break;
 119         default:
 120                 QPRINTK(qdev, PROBE, ALERT, "Bad Semaphore mask!.\n");
 121                 return -EINVAL;
 122         }
 123
 124         ql_write32(qdev, SEM, sem_bits | sem_mask);
 125         return !(ql_read32(qdev, SEM) & sem_bits);
 126 }
 127
 128 int ql_sem_spinlock(struct ql_adapter *qdev, u32 sem_mask)
 129 {
 130         unsigned int seconds = 3;
 131         do {
 132                 if (!ql_sem_trylock(qdev, sem_mask))
 133                         return 0;
 134                 ssleep(1);
 135         } while (--seconds);
 136         return -ETIMEDOUT;
 137 }
 138
 139 void ql_sem_unlock(struct ql_adapter *qdev, u32 sem_mask)
 140 {
 141         ql_write32(qdev, SEM, sem_mask);
 142         ql_read32(qdev, SEM);   /* flush */
 143 }
 144
 145 /* This function waits for a specific bit to come ready
 146  * in a given register.  It is used mostly by the initialize
 147  * process, but is also used in kernel thread API such as
 148  * netdev->set_multi, netdev->set_mac_address, netdev->vlan_rx_add_vid.
 149  */
 150 int ql_wait_reg_rdy(struct ql_adapter *qdev, u32 reg, u32 bit, u32 err_bit)
 151 {
 152         u32 temp;
 153         int count = UDELAY_COUNT;
 154
 155         while (count) {
 156                 temp = ql_read32(qdev, reg);
 157
 158                 /* check for errors */
 159                 if (temp & err_bit) {
 160                         QPRINTK(qdev, PROBE, ALERT,
 161                                 "register 0x%.08x access error, value = 0x%.08x!.\n",
 162                                 reg, temp);
 163                         return -EIO;
 164                 } else if (temp & bit)
 165                         return 0;
 166                 udelay(UDELAY_DELAY);
 167                 count--;
 168         }
 169         QPRINTK(qdev, PROBE, ALERT,
 170                 "Timed out waiting for reg %x to come ready.\n", reg);
 171         return -ETIMEDOUT;
 172 }
 173
 174 /* The CFG register is used to download TX and RX control blocks
 175  * to the chip. This function waits for an operation to complete.
 176  */
 177 static int ql_wait_cfg(struct ql_adapter *qdev, u32 bit)
 178 {
 179         int count = UDELAY_COUNT;
 180         u32 temp;
 181
 182         while (count) {
 183                 temp = ql_read32(qdev, CFG);
 184                 if (temp & CFG_LE)
 185                         return -EIO;
 186                 if (!(temp & bit))
 187                         return 0;
 188                 udelay(UDELAY_DELAY);
 189                 count--;
 190         }
 191         return -ETIMEDOUT;
 192 }
 193
 194
 195 /* Used to issue init control blocks to hw. Maps control block,
 196  * sets address, triggers download, waits for completion.
 197  */
 198 int ql_write_cfg(struct ql_adapter *qdev, void *ptr, int size, u32 bit,
 199                  u16 q_id)
 200 {
 201         u64 map;
 202         int status = 0;
 203         int direction;
 204         u32 mask;
 205         u32 value;
 206
 207         direction =
 208             (bit & (CFG_LRQ | CFG_LR | CFG_LCQ)) ? PCI_DMA_TODEVICE :
 209             PCI_DMA_FROMDEVICE;
 210
 211         map = pci_map_single(qdev->pdev, ptr, size, direction);
 212         if (pci_dma_mapping_error(qdev->pdev, map)) {
 213                 QPRINTK(qdev, IFUP, ERR, "Couldn't map DMA area.\n");
 214                 return -ENOMEM;
 215         }
 216
 217         status = ql_wait_cfg(qdev, bit);
 218         if (status) {
 219                 QPRINTK(qdev, IFUP, ERR,
 220                         "Timed out waiting for CFG to come ready.\n");
 221                 goto exit;
 222         }
 223
 224         status = ql_sem_spinlock(qdev, SEM_ICB_MASK);
 225         if (status)
 226                 goto exit;
 227         ql_write32(qdev, ICB_L, (u32) map);
 228         ql_write32(qdev, ICB_H, (u32) (map >> 32));
 229         ql_sem_unlock(qdev, SEM_ICB_MASK);      /* does flush too */
 230
 231         mask = CFG_Q_MASK | (bit << 16);
 232         value = bit | (q_id << CFG_Q_SHIFT);
 233         ql_write32(qdev, CFG, (mask | value));
 234
 235         /*
 236          * Wait for the bit to clear after signaling hw.
 237          */
 238         status = ql_wait_cfg(qdev, bit);
 239 exit:
 240         pci_unmap_single(qdev->pdev, map, size, direction);
 241         return status;
 242 }
 243
 244 /* Get a specific MAC address from the CAM.  Used for debug and reg dump. */
 245 int ql_get_mac_addr_reg(struct ql_adapter *qdev, u32 type, u16 index,
 246                         u32 *value)
 247 {
 248         u32 offset = 0;
 249         int status;
 250
 251         status = ql_sem_spinlock(qdev, SEM_MAC_ADDR_MASK);
 252         if (status)
 253                 return status;
 254         switch (type) {
 255         case MAC_ADDR_TYPE_MULTI_MAC:
 256         case MAC_ADDR_TYPE_CAM_MAC:
 257                 {
 258                         status =
 259                             ql_wait_reg_rdy(qdev,
 260                                 MAC_ADDR_IDX, MAC_ADDR_MW, 0);
 261                         if (status)
 262                                 goto exit;
 263                         ql_write32(qdev, MAC_ADDR_IDX, (offset++) | /* offset */
 264                                    (index << MAC_ADDR_IDX_SHIFT) | /* index */
 265                                    MAC_ADDR_ADR | MAC_ADDR_RS | type); /* type */
 266                         status =
 267                             ql_wait_reg_rdy(qdev,
 268                                 MAC_ADDR_IDX, MAC_ADDR_MR, 0);
 269                         if (status)
 270                                 goto exit;
 271                         *value++ = ql_read32(qdev, MAC_ADDR_DATA);
 272                         status =
 273                             ql_wait_reg_rdy(qdev,
 274                                 MAC_ADDR_IDX, MAC_ADDR_MW, 0);
 275                         if (status)
 276                                 goto exit;
 277                         ql_write32(qdev, MAC_ADDR_IDX, (offset++) | /* offset */
 278                                    (index << MAC_ADDR_IDX_SHIFT) | /* index */
 279                                    MAC_ADDR_ADR | MAC_ADDR_RS | type); /* type */
 280                         status =
 281                             ql_wait_reg_rdy(qdev,
 282                                 MAC_ADDR_IDX, MAC_ADDR_MR, 0);
 283                         if (status)
 284                                 goto exit;
 285                         *value++ = ql_read32(qdev, MAC_ADDR_DATA);
 286                         if (type == MAC_ADDR_TYPE_CAM_MAC) {
 287                                 status =
 288                                     ql_wait_reg_rdy(qdev,
 289                                         MAC_ADDR_IDX, MAC_ADDR_MW, 0);
 290                                 if (status)
 291                                         goto exit;
 292                                 ql_write32(qdev, MAC_ADDR_IDX, (offset++) | /* offset */
 293                                            (index << MAC_ADDR_IDX_SHIFT) | /* index */
 294                                            MAC_ADDR_ADR | MAC_ADDR_RS | type); /* type */
 295                                 status =
 296                                     ql_wait_reg_rdy(qdev, MAC_ADDR_IDX,
 297                                                     MAC_ADDR_MR, 0);
 298                                 if (status)
 299                                         goto exit;
 300                                 *value++ = ql_read32(qdev, MAC_ADDR_DATA);
 301                         }
 302                         break;
 303                 }
 304         case MAC_ADDR_TYPE_VLAN:
 305         case MAC_ADDR_TYPE_MULTI_FLTR:
 306         default:
 307                 QPRINTK(qdev, IFUP, CRIT,
 308                         "Address type %d not yet supported.\n", type);
 309                 status = -EPERM;
 310         }
 311 exit:
 312         ql_sem_unlock(qdev, SEM_MAC_ADDR_MASK);
 313         return status;
 314 }
 315
 316 /* Set up a MAC, multicast or VLAN address for the
 317  * inbound frame matching.
 318  */
 319 static int ql_set_mac_addr_reg(struct ql_adapter *qdev, u8 *addr, u32 type,
 320                                u16 index)
 321 {
 322         u32 offset = 0;
 323         int status = 0;
 324
 325         status = ql_sem_spinlock(qdev, SEM_MAC_ADDR_MASK);
 326         if (status)
 327                 return status;
 328         switch (type) {
 329         case MAC_ADDR_TYPE_MULTI_MAC:
 330         case MAC_ADDR_TYPE_CAM_MAC:
 331                 {
 332                         u32 cam_output;
 333                         u32 upper = (addr[0] << 8) | addr[1];
 334                         u32 lower =
 335                             (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) |
 336                             (addr[5]);
 337
 338                         QPRINTK(qdev, IFUP, INFO,
 339                                 "Adding %s address %pM"
 340                                 " at index %d in the CAM.\n",
 341                                 ((type ==
 342                                   MAC_ADDR_TYPE_MULTI_MAC) ? "MULTICAST" :
 343                                  "UNICAST"), addr, index);
 344
 345                         status =
 346                             ql_wait_reg_rdy(qdev,
 347                                 MAC_ADDR_IDX, MAC_ADDR_MW, 0);
 348                         if (status)
 349                                 goto exit;
 350                         ql_write32(qdev, MAC_ADDR_IDX, (offset++) | /* offset */
 351                                    (index << MAC_ADDR_IDX_SHIFT) | /* index */
 352                                    type);       /* type */
 353                         ql_write32(qdev, MAC_ADDR_DATA, lower);
 354                         status =
 355                             ql_wait_reg_rdy(qdev,
 356                                 MAC_ADDR_IDX, MAC_ADDR_MW, 0);
 357                         if (status)
 358                                 goto exit;
 359                         ql_write32(qdev, MAC_ADDR_IDX, (offset++) | /* offset */
 360                                    (index << MAC_ADDR_IDX_SHIFT) | /* index */
 361                                    type);       /* type */
 362                         ql_write32(qdev, MAC_ADDR_DATA, upper);
 363                         status =
 364                             ql_wait_reg_rdy(qdev,
 365                                 MAC_ADDR_IDX, MAC_ADDR_MW, 0);
 366                         if (status)
 367                                 goto exit;
 368                         ql_write32(qdev, MAC_ADDR_IDX, (offset) |       /* offset */
 369                                    (index << MAC_ADDR_IDX_SHIFT) |      /* index */
 370                                    type);       /* type */
 371                         /* This field should also include the queue id
 372                            and possibly the function id.  Right now we hardcode
 373                            the route field to NIC core.
 374                          */
 375                         if (type == MAC_ADDR_TYPE_CAM_MAC) {
 376                                 cam_output = (CAM_OUT_ROUTE_NIC |
 377                                               (qdev->
 378                                                func << CAM_OUT_FUNC_SHIFT) |
 379                                               (qdev->
 380                                                rss_ring_first_cq_id <<
 381                                                CAM_OUT_CQ_ID_SHIFT));
 382                                 if (qdev->vlgrp)
 383                                         cam_output |= CAM_OUT_RV;
 384                                 /* route to NIC core */
 385                                 ql_write32(qdev, MAC_ADDR_DATA, cam_output);
 386                         }
 387                         break;
 388                 }
 389         case MAC_ADDR_TYPE_VLAN:
 390                 {
 391                         u32 enable_bit = *((u32 *) &addr[0]);
 392                         /* For VLAN, the addr actually holds a bit that
 393                          * either enables or disables the vlan id we are
 394                          * addressing. It's either MAC_ADDR_E on or off.
 395                          * That's bit-27 we're talking about.
 396                          */
 397                         QPRINTK(qdev, IFUP, INFO, "%s VLAN ID %d %s the CAM.\n",
 398                                 (enable_bit ? "Adding" : "Removing"),
 399                                 index, (enable_bit ? "to" : "from"));
 400
 401                         status =
 402                             ql_wait_reg_rdy(qdev,
 403                                 MAC_ADDR_IDX, MAC_ADDR_MW, 0);
 404                         if (status)
 405                                 goto exit;
 406                         ql_write32(qdev, MAC_ADDR_IDX, offset | /* offset */
 407                                    (index << MAC_ADDR_IDX_SHIFT) |      /* index */
 408                                    type |       /* type */
 409                                    enable_bit); /* enable/disable */
 410                         break;
 411                 }
 412         case MAC_ADDR_TYPE_MULTI_FLTR:
 413         default:
 414                 QPRINTK(qdev, IFUP, CRIT,
 415                         "Address type %d not yet supported.\n", type);
 416                 status = -EPERM;
 417         }
 418 exit:
 419         ql_sem_unlock(qdev, SEM_MAC_ADDR_MASK);
 420         return status;
 421 }
 422
 423 /* Get a specific frame routing value from the CAM.
 424  * Used for debug and reg dump.
 425  */
 426 int ql_get_routing_reg(struct ql_adapter *qdev, u32 index, u32 *value)
 427 {
 428         int status = 0;
 429
 430         status = ql_sem_spinlock(qdev, SEM_RT_IDX_MASK);
 431         if (status)
 432                 goto exit;
 433
 434         status = ql_wait_reg_rdy(qdev, RT_IDX, RT_IDX_MW, 0);
 435         if (status)
 436                 goto exit;
 437
 438         ql_write32(qdev, RT_IDX,
 439                    RT_IDX_TYPE_NICQ | RT_IDX_RS | (index << RT_IDX_IDX_SHIFT));
 440         status = ql_wait_reg_rdy(qdev, RT_IDX, RT_IDX_MR, 0);
 441         if (status)
 442                 goto exit;
 443         *value = ql_read32(qdev, RT_DATA);
 444 exit:
 445         ql_sem_unlock(qdev, SEM_RT_IDX_MASK);
 446         return status;
 447 }
 448
 449 /* The NIC function for this chip has 16 routing indexes.  Each one can be used
 450  * to route different frame types to various inbound queues.  We send broadcast/
 451  * multicast/error frames to the default queue for slow handling,
 452  * and CAM hit/RSS frames to the fast handling queues.
 453  */
 454 static int ql_set_routing_reg(struct ql_adapter *qdev, u32 index, u32 mask,
 455                               int enable)
 456 {
 457         int status;
 458         u32 value = 0;
 459
 460         status = ql_sem_spinlock(qdev, SEM_RT_IDX_MASK);
 461         if (status)
 462                 return status;
 463
 464         QPRINTK(qdev, IFUP, DEBUG,
 465                 "%s %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s mask %s the routing reg.\n",
 466                 (enable ? "Adding" : "Removing"),
 467                 ((index == RT_IDX_ALL_ERR_SLOT) ? "MAC ERROR/ALL ERROR" : ""),
 468                 ((index == RT_IDX_IP_CSUM_ERR_SLOT) ? "IP CSUM ERROR" : ""),
 469                 ((index ==
 470                   RT_IDX_TCP_UDP_CSUM_ERR_SLOT) ? "TCP/UDP CSUM ERROR" : ""),
 471                 ((index == RT_IDX_BCAST_SLOT) ? "BROADCAST" : ""),
 472                 ((index == RT_IDX_MCAST_MATCH_SLOT) ? "MULTICAST MATCH" : ""),
 473                 ((index == RT_IDX_ALLMULTI_SLOT) ? "ALL MULTICAST MATCH" : ""),
 474                 ((index == RT_IDX_UNUSED6_SLOT) ? "UNUSED6" : ""),
 475                 ((index == RT_IDX_UNUSED7_SLOT) ? "UNUSED7" : ""),
 476                 ((index == RT_IDX_RSS_MATCH_SLOT) ? "RSS ALL/IPV4 MATCH" : ""),
 477                 ((index == RT_IDX_RSS_IPV6_SLOT) ? "RSS IPV6" : ""),
 478                 ((index == RT_IDX_RSS_TCP4_SLOT) ? "RSS TCP4" : ""),
 479                 ((index == RT_IDX_RSS_TCP6_SLOT) ? "RSS TCP6" : ""),
 480                 ((index == RT_IDX_CAM_HIT_SLOT) ? "CAM HIT" : ""),
 481                 ((index == RT_IDX_UNUSED013) ? "UNUSED13" : ""),
 482                 ((index == RT_IDX_UNUSED014) ? "UNUSED14" : ""),
 483                 ((index == RT_IDX_PROMISCUOUS_SLOT) ? "PROMISCUOUS" : ""),
 484                 (enable ? "to" : "from"));
 485
 486         switch (mask) {
 487         case RT_IDX_CAM_HIT:
 488                 {
 489                         value = RT_IDX_DST_CAM_Q |      /* dest */
 490                             RT_IDX_TYPE_NICQ |  /* type */
 491                             (RT_IDX_CAM_HIT_SLOT << RT_IDX_IDX_SHIFT);/* index */
 492                         break;
 493                 }
 494         case RT_IDX_VALID:      /* Promiscuous Mode frames. */
 495                 {
 496                         value = RT_IDX_DST_DFLT_Q |     /* dest */
 497                             RT_IDX_TYPE_NICQ |  /* type */
 498                             (RT_IDX_PROMISCUOUS_SLOT << RT_IDX_IDX_SHIFT);/* index */
 499                         break;
 500                 }
 501         case RT_IDX_ERR:        /* Pass up MAC,IP,TCP/UDP error frames. */
 502                 {
 503                         value = RT_IDX_DST_DFLT_Q |     /* dest */
 504                             RT_IDX_TYPE_NICQ |  /* type */
 505                             (RT_IDX_ALL_ERR_SLOT << RT_IDX_IDX_SHIFT);/* index */
 506                         break;
 507                 }
 508         case RT_IDX_BCAST:      /* Pass up Broadcast frames to default Q. */
 509                 {
 510                         value = RT_IDX_DST_DFLT_Q |     /* dest */
 511                             RT_IDX_TYPE_NICQ |  /* type */
 512                             (RT_IDX_BCAST_SLOT << RT_IDX_IDX_SHIFT);/* index */
 513                         break;
 514                 }
 515         case RT_IDX_MCAST:      /* Pass up All Multicast frames. */
 516                 {
 517                         value = RT_IDX_DST_CAM_Q |      /* dest */
 518                             RT_IDX_TYPE_NICQ |  /* type */
 519                             (RT_IDX_ALLMULTI_SLOT << RT_IDX_IDX_SHIFT);/* index */
 520                         break;
 521                 }
 522         case RT_IDX_MCAST_MATCH:        /* Pass up matched Multicast frames. */
 523                 {
 524                         value = RT_IDX_DST_CAM_Q |      /* dest */
 525                             RT_IDX_TYPE_NICQ |  /* type */
 526                             (RT_IDX_MCAST_MATCH_SLOT << RT_IDX_IDX_SHIFT);/* index */
 527                         break;
 528                 }
 529         case RT_IDX_RSS_MATCH:  /* Pass up matched RSS frames. */
 530                 {
 531                         value = RT_IDX_DST_RSS |        /* dest */
 532                             RT_IDX_TYPE_NICQ |  /* type */
 533                             (RT_IDX_RSS_MATCH_SLOT << RT_IDX_IDX_SHIFT);/* index */
 534                         break;
 535                 }
 536         case 0:         /* Clear the E-bit on an entry. */
 537                 {
 538                         value = RT_IDX_DST_DFLT_Q |     /* dest */
 539                             RT_IDX_TYPE_NICQ |  /* type */
 540                             (index << RT_IDX_IDX_SHIFT);/* index */
 541                         break;
 542                 }
 543         default:
 544                 QPRINTK(qdev, IFUP, ERR, "Mask type %d not yet supported.\n",
 545                         mask);
 546                 status = -EPERM;
 547                 goto exit;
 548         }
 549
 550         if (value) {
 551                 status = ql_wait_reg_rdy(qdev, RT_IDX, RT_IDX_MW, 0);
 552                 if (status)
 553                         goto exit;
 554                 value |= (enable ? RT_IDX_E : 0);
 555                 ql_write32(qdev, RT_IDX, value);
 556                 ql_write32(qdev, RT_DATA, enable ? mask : 0);
 557         }
 558 exit:
 559         ql_sem_unlock(qdev, SEM_RT_IDX_MASK);
 560         return status;
 561 }
 562
 563 static void ql_enable_interrupts(struct ql_adapter *qdev)
 564 {
 565         ql_write32(qdev, INTR_EN, (INTR_EN_EI << 16) | INTR_EN_EI);
 566 }
 567
 568 static void ql_disable_interrupts(struct ql_adapter *qdev)
 569 {
 570         ql_write32(qdev, INTR_EN, (INTR_EN_EI << 16));
 571 }
 572
 573 /* If we're running with multiple MSI-X vectors then we enable on the fly.
 574  * Otherwise, we may have multiple outstanding workers and don't want to
 575  * enable until the last one finishes. In this case, the irq_cnt gets
 576  * incremented everytime we queue a worker and decremented everytime
 577  * a worker finishes.  Once it hits zero we enable the interrupt.
 578  */
 579 u32 ql_enable_completion_interrupt(struct ql_adapter *qdev, u32 intr)
 580 {
 581         u32 var = 0;
 582         unsigned long hw_flags = 0;
 583         struct intr_context *ctx = qdev->intr_context + intr;
 584
 585         if (likely(test_bit(QL_MSIX_ENABLED, &qdev->flags) && intr)) {
 586                 /* Always enable if we're MSIX multi interrupts and
 587                  * it's not the default (zeroeth) interrupt.
 588                  */
 589                 ql_write32(qdev, INTR_EN,
 590                            ctx->intr_en_mask);
 591                 var = ql_read32(qdev, STS);
 592                 return var;
 593         }
 594
 595         spin_lock_irqsave(&qdev->hw_lock, hw_flags);
 596         if (atomic_dec_and_test(&ctx->irq_cnt)) {
 597                 ql_write32(qdev, INTR_EN,
 598                            ctx->intr_en_mask);
 599                 var = ql_read32(qdev, STS);
 600         }
 601         spin_unlock_irqrestore(&qdev->hw_lock, hw_flags);
 602         return var;
 603 }
 604
 605 static u32 ql_disable_completion_interrupt(struct ql_adapter *qdev, u32 intr)
 606 {
 607         u32 var = 0;
 608         unsigned long hw_flags;
 609         struct intr_context *ctx;
 610
 611         /* HW disables for us if we're MSIX multi interrupts and
 612          * it's not the default (zeroeth) interrupt.
 613          */
 614         if (likely(test_bit(QL_MSIX_ENABLED, &qdev->flags) && intr))
 615                 return 0;
 616
 617         ctx = qdev->intr_context + intr;
 618         spin_lock_irqsave(&qdev->hw_lock, hw_flags);
 619         if (!atomic_read(&ctx->irq_cnt)) {
 620                 ql_write32(qdev, INTR_EN,
 621                 ctx->intr_dis_mask);
 622                 var = ql_read32(qdev, STS);
 623         }
 624         atomic_inc(&ctx->irq_cnt);
 625         spin_unlock_irqrestore(&qdev->hw_lock, hw_flags);
 626         return var;
 627 }
 628
 629 static void ql_enable_all_completion_interrupts(struct ql_adapter *qdev)
 630 {
 631         int i;
 632         for (i = 0; i < qdev->intr_count; i++) {
 633                 /* The enable call does a atomic_dec_and_test
 634                  * and enables only if the result is zero.
 635                  * So we precharge it here.
 636                  */
 637                 if (unlikely(!test_bit(QL_MSIX_ENABLED, &qdev->flags) ||
 638                         i == 0))
 639                         atomic_set(&qdev->intr_context[i].irq_cnt, 1);
 640                 ql_enable_completion_interrupt(qdev, i);
 641         }
 642
 643 }
 644
 645 static int ql_read_flash_word(struct ql_adapter *qdev, int offset, u32 *data)
 646 {
 647         int status = 0;
 648         /* wait for reg to come ready */
 649         status = ql_wait_reg_rdy(qdev,
 650                         FLASH_ADDR, FLASH_ADDR_RDY, FLASH_ADDR_ERR);
 651         if (status)
 652                 goto exit;
 653         /* set up for reg read */
 654         ql_write32(qdev, FLASH_ADDR, FLASH_ADDR_R | offset);
 655         /* wait for reg to come ready */
 656         status = ql_wait_reg_rdy(qdev,
 657                         FLASH_ADDR, FLASH_ADDR_RDY, FLASH_ADDR_ERR);
 658         if (status)
 659                 goto exit;
 660         /* get the data */
 661         *data = ql_read32(qdev, FLASH_DATA);
 662 exit:
 663         return status;
 664 }
 665
 666 static int ql_get_flash_params(struct ql_adapter *qdev)
 667 {
 668         int i;
 669         int status;
 670         u32 *p = (u32 *)&qdev->flash;
 671
 672         if (ql_sem_spinlock(qdev, SEM_FLASH_MASK))
 673                 return -ETIMEDOUT;
 674
 675         for (i = 0; i < sizeof(qdev->flash) / sizeof(u32); i++, p++) {
 676                 status = ql_read_flash_word(qdev, i, p);
 677                 if (status) {
 678                         QPRINTK(qdev, IFUP, ERR, "Error reading flash.\n");
 679                         goto exit;
 680                 }
 681
 682         }
 683 exit:
 684         ql_sem_unlock(qdev, SEM_FLASH_MASK);
 685         return status;
 686 }
 687
 688 /* xgmac register are located behind the xgmac_addr and xgmac_data
 689  * register pair.  Each read/write requires us to wait for the ready
 690  * bit before reading/writing the data.
 691  */
 692 static int ql_write_xgmac_reg(struct ql_adapter *qdev, u32 reg, u32 data)
 693 {
 694         int status;
 695         /* wait for reg to come ready */
 696         status = ql_wait_reg_rdy(qdev,
 697                         XGMAC_ADDR, XGMAC_ADDR_RDY, XGMAC_ADDR_XME);
 698         if (status)
 699                 return status;
 700         /* write the data to the data reg */
 701         ql_write32(qdev, XGMAC_DATA, data);
 702         /* trigger the write */
 703         ql_write32(qdev, XGMAC_ADDR, reg);
 704         return status;
 705 }
 706
 707 /* xgmac register are located behind the xgmac_addr and xgmac_data
 708  * register pair.  Each read/write requires us to wait for the ready
 709  * bit before reading/writing the data.
 710  */
 711 int ql_read_xgmac_reg(struct ql_adapter *qdev, u32 reg, u32 *data)
 712 {
 713         int status = 0;
 714         /* wait for reg to come ready */
 715         status = ql_wait_reg_rdy(qdev,
 716                         XGMAC_ADDR, XGMAC_ADDR_RDY, XGMAC_ADDR_XME);
 717         if (status)
 718                 goto exit;
 719         /* set up for reg read */
 720         ql_write32(qdev, XGMAC_ADDR, reg | XGMAC_ADDR_R);
 721         /* wait for reg to come ready */
 722         status = ql_wait_reg_rdy(qdev,
 723                         XGMAC_ADDR, XGMAC_ADDR_RDY, XGMAC_ADDR_XME);
 724         if (status)
 725                 goto exit;
 726         /* get the data */
 727         *data = ql_read32(qdev, XGMAC_DATA);
 728 exit:
 729         return status;
 730 }
 731
 732 /* This is used for reading the 64-bit statistics regs. */
 733 int ql_read_xgmac_reg64(struct ql_adapter *qdev, u32 reg, u64 *data)
 734 {
 735         int status = 0;
 736         u32 hi = 0;
 737         u32 lo = 0;
 738
 739         status = ql_read_xgmac_reg(qdev, reg, &lo);
 740         if (status)
 741                 goto exit;
 742
 743         status = ql_read_xgmac_reg(qdev, reg + 4, &hi);
 744         if (status)
 745                 goto exit;
 746
 747         *data = (u64) lo | ((u64) hi << 32);
 748
 749 exit:
 750         return status;
 751 }
 752
 753 /* Take the MAC Core out of reset.
 754  * Enable statistics counting.
 755  * Take the transmitter/receiver out of reset.
 756  * This functionality may be done in the MPI firmware at a
 757  * later date.
 758  */
 759 static int ql_port_initialize(struct ql_adapter *qdev)
 760 {
 761         int status = 0;
 762         u32 data;
 763
 764         if (ql_sem_trylock(qdev, qdev->xg_sem_mask)) {
 765                 /* Another function has the semaphore, so
 766                  * wait for the port init bit to come ready.
 767                  */
 768                 QPRINTK(qdev, LINK, INFO,
 769                         "Another function has the semaphore, so wait for the port init bit to come ready.\n");
 770                 status = ql_wait_reg_rdy(qdev, STS, qdev->port_init, 0);
 771                 if (status) {
 772                         QPRINTK(qdev, LINK, CRIT,
 773                                 "Port initialize timed out.\n");
 774                 }
 775                 return status;
 776         }
 777
 778         QPRINTK(qdev, LINK, INFO, "Got xgmac semaphore!.\n");
 779         /* Set the core reset. */
 780         status = ql_read_xgmac_reg(qdev, GLOBAL_CFG, &data);
 781         if (status)
 782                 goto end;
 783         data |= GLOBAL_CFG_RESET;
 784         status = ql_write_xgmac_reg(qdev, GLOBAL_CFG, data);
 785         if (status)
 786                 goto end;
 787
 788         /* Clear the core reset and turn on jumbo for receiver. */
 789         data &= ~GLOBAL_CFG_RESET;      /* Clear core reset. */
 790         data |= GLOBAL_CFG_JUMBO;       /* Turn on jumbo. */
 791         data |= GLOBAL_CFG_TX_STAT_EN;
 792         data |= GLOBAL_CFG_RX_STAT_EN;
 793         status = ql_write_xgmac_reg(qdev, GLOBAL_CFG, data);
 794         if (status)
 795                 goto end;
 796
 797         /* Enable transmitter, and clear it's reset. */
 798         status = ql_read_xgmac_reg(qdev, TX_CFG, &data);
 799         if (status)
 800                 goto end;
 801         data &= ~TX_CFG_RESET;  /* Clear the TX MAC reset. */
 802         data |= TX_CFG_EN;      /* Enable the transmitter. */
 803         status = ql_write_xgmac_reg(qdev, TX_CFG, data);
 804         if (status)
 805                 goto end;
 806
 807         /* Enable receiver and clear it's reset. */
 808         status = ql_read_xgmac_reg(qdev, RX_CFG, &data);
 809         if (status)
 810                 goto end;
 811         data &= ~RX_CFG_RESET;  /* Clear the RX MAC reset. */
 812         data |= RX_CFG_EN;      /* Enable the receiver. */
 813         status = ql_write_xgmac_reg(qdev, RX_CFG, data);
 814         if (status)
 815                 goto end;
 816
 817         /* Turn on jumbo. */
 818         status =
 819             ql_write_xgmac_reg(qdev, MAC_TX_PARAMS, MAC_TX_PARAMS_JUMBO | (0x2580 << 16));
 820         if (status)
 821                 goto end;
 822         status =
 823             ql_write_xgmac_reg(qdev, MAC_RX_PARAMS, 0x2580);
 824         if (status)
 825                 goto end;
 826
 827         /* Signal to the world that the port is enabled.        */
 828         ql_write32(qdev, STS, ((qdev->port_init << 16) | qdev->port_init));
 829 end:
 830         ql_sem_unlock(qdev, qdev->xg_sem_mask);
 831         return status;
 832 }
 833
 834 /* Get the next large buffer. */
 835 static struct bq_desc *ql_get_curr_lbuf(struct rx_ring *rx_ring)
 836 {
 837         struct bq_desc *lbq_desc = &rx_ring->lbq[rx_ring->lbq_curr_idx];
 838         rx_ring->lbq_curr_idx++;
 839         if (rx_ring->lbq_curr_idx == rx_ring->lbq_len)
 840                 rx_ring->lbq_curr_idx = 0;
 841         rx_ring->lbq_free_cnt++;
 842         return lbq_desc;
 843 }
 844
 845 /* Get the next small buffer. */
 846 static struct bq_desc *ql_get_curr_sbuf(struct rx_ring *rx_ring)
 847 {
 848         struct bq_desc *sbq_desc = &rx_ring->sbq[rx_ring->sbq_curr_idx];
 849         rx_ring->sbq_curr_idx++;
 850         if (rx_ring->sbq_curr_idx == rx_ring->sbq_len)
 851                 rx_ring->sbq_curr_idx = 0;
 852         rx_ring->sbq_free_cnt++;
 853         return sbq_desc;
 854 }
 855
 856 /* Update an rx ring index. */
 857 static void ql_update_cq(struct rx_ring *rx_ring)
 858 {
 859         rx_ring->cnsmr_idx++;
 860         rx_ring->curr_entry++;
 861         if (unlikely(rx_ring->cnsmr_idx == rx_ring->cq_len)) {
 862                 rx_ring->cnsmr_idx = 0;
 863                 rx_ring->curr_entry = rx_ring->cq_base;
 864         }
 865 }
 866
 867 static void ql_write_cq_idx(struct rx_ring *rx_ring)
 868 {
 869         ql_write_db_reg(rx_ring->cnsmr_idx, rx_ring->cnsmr_idx_db_reg);
 870 }
 871
 872 /* Process (refill) a large buffer queue. */
 873 static void ql_update_lbq(struct ql_adapter *qdev, struct rx_ring *rx_ring)
 874 {
 875         int clean_idx = rx_ring->lbq_clean_idx;
 876         struct bq_desc *lbq_desc;
 877         u64 map;
 878         int i;
 879
 880         while (rx_ring->lbq_free_cnt > 16) {
 881                 for (i = 0; i < 16; i++) {
 882                         QPRINTK(qdev, RX_STATUS, DEBUG,
 883                                 "lbq: try cleaning clean_idx = %d.\n",
 884                                 clean_idx);
 885                         lbq_desc = &rx_ring->lbq[clean_idx];
 886                         if (lbq_desc->p.lbq_page == NULL) {
 887                                 QPRINTK(qdev, RX_STATUS, DEBUG,
 888                                         "lbq: getting new page for index %d.\n",
 889                                         lbq_desc->index);
 890                                 lbq_desc->p.lbq_page = alloc_page(GFP_ATOMIC);
 891                                 if (lbq_desc->p.lbq_page == NULL) {
 892                                         QPRINTK(qdev, RX_STATUS, ERR,
 893                                                 "Couldn't get a page.\n");
 894                                         return;
 895                                 }
 896                                 map = pci_map_page(qdev->pdev,
 897                                                    lbq_desc->p.lbq_page,
 898                                                    0, PAGE_SIZE,
 899                                                    PCI_DMA_FROMDEVICE);
 900                                 if (pci_dma_mapping_error(qdev->pdev, map)) {
 901                                         QPRINTK(qdev, RX_STATUS, ERR,
 902                                                 "PCI mapping failed.\n");
 903                                         return;
 904                                 }
 905                                 pci_unmap_addr_set(lbq_desc, mapaddr, map);
 906                                 pci_unmap_len_set(lbq_desc, maplen, PAGE_SIZE);
 907                                 *lbq_desc->addr = cpu_to_le64(map);
 908                         }
 909                         clean_idx++;
 910                         if (clean_idx == rx_ring->lbq_len)
 911                                 clean_idx = 0;
 912                 }
 913
 914                 rx_ring->lbq_clean_idx = clean_idx;
 915                 rx_ring->lbq_prod_idx += 16;
 916                 if (rx_ring->lbq_prod_idx == rx_ring->lbq_len)
 917                         rx_ring->lbq_prod_idx = 0;
 918                 QPRINTK(qdev, RX_STATUS, DEBUG,
 919                         "lbq: updating prod idx = %d.\n",
 920                         rx_ring->lbq_prod_idx);
 921                 ql_write_db_reg(rx_ring->lbq_prod_idx,
 922                                 rx_ring->lbq_prod_idx_db_reg);
 923                 rx_ring->lbq_free_cnt -= 16;
 924         }
 925 }
 926
 927 /* Process (refill) a small buffer queue. */
 928 static void ql_update_sbq(struct ql_adapter *qdev, struct rx_ring *rx_ring)
 929 {
 930         int clean_idx = rx_ring->sbq_clean_idx;
 931         struct bq_desc *sbq_desc;
 932         u64 map;
 933         int i;
 934
 935         while (rx_ring->sbq_free_cnt > 16) {
 936                 for (i = 0; i < 16; i++) {
 937                         sbq_desc = &rx_ring->sbq[clean_idx];
 938                         QPRINTK(qdev, RX_STATUS, DEBUG,
 939                                 "sbq: try cleaning clean_idx = %d.\n",
 940                                 clean_idx);
 941                         if (sbq_desc->p.skb == NULL) {
 942                                 QPRINTK(qdev, RX_STATUS, DEBUG,
 943                                         "sbq: getting new skb for index %d.\n",
 944                                         sbq_desc->index);
 945                                 sbq_desc->p.skb =
 946                                     netdev_alloc_skb(qdev->ndev,
 947                                                      rx_ring->sbq_buf_size);
 948                                 if (sbq_desc->p.skb == NULL) {
 949                                         QPRINTK(qdev, PROBE, ERR,
 950                                                 "Couldn't get an skb.\n");
 951                                         rx_ring->sbq_clean_idx = clean_idx;
 952                                         return;
 953                                 }
 954                                 skb_reserve(sbq_desc->p.skb, QLGE_SB_PAD);
 955                                 map = pci_map_single(qdev->pdev,
 956                                                      sbq_desc->p.skb->data,
 957                                                      rx_ring->sbq_buf_size /
 958                                                      2, PCI_DMA_FROMDEVICE);
 959                                 if (pci_dma_mapping_error(qdev->pdev, map)) {
 960                                         QPRINTK(qdev, IFUP, ERR, "PCI mapping failed.\n");
 961                                         rx_ring->sbq_clean_idx = clean_idx;
 962                                         return;
 963                                 }
 964                                 pci_unmap_addr_set(sbq_desc, mapaddr, map);
 965                                 pci_unmap_len_set(sbq_desc, maplen,
 966                                                   rx_ring->sbq_buf_size / 2);
 967                                 *sbq_desc->addr = cpu_to_le64(map);
 968                         }
 969
 970                         clean_idx++;
 971                         if (clean_idx == rx_ring->sbq_len)
 972                                 clean_idx = 0;
 973                 }
 974                 rx_ring->sbq_clean_idx = clean_idx;
 975                 rx_ring->sbq_prod_idx += 16;
 976                 if (rx_ring->sbq_prod_idx == rx_ring->sbq_len)
 977                         rx_ring->sbq_prod_idx = 0;
 978                 QPRINTK(qdev, RX_STATUS, DEBUG,
 979                         "sbq: updating prod idx = %d.\n",
 980                         rx_ring->sbq_prod_idx);
 981                 ql_write_db_reg(rx_ring->sbq_prod_idx,
 982                                 rx_ring->sbq_prod_idx_db_reg);
 983
 984                 rx_ring->sbq_free_cnt -= 16;
 985         }
 986 }
 987
 988 static void ql_update_buffer_queues(struct ql_adapter *qdev,
 989                                     struct rx_ring *rx_ring)
 990 {
 991         ql_update_sbq(qdev, rx_ring);
 992         ql_update_lbq(qdev, rx_ring);
 993 }
 994
 995 /* Unmaps tx buffers.  Can be called from send() if a pci mapping
 996  * fails at some stage, or from the interrupt when a tx completes.
 997  */
 998 static void ql_unmap_send(struct ql_adapter *qdev,
 999                           struct tx_ring_desc *tx_ring_desc, int mapped)
1000 {
1001         int i;
1002         for (i = 0; i < mapped; i++) {
1003                 if (i == 0 || (i == 7 && mapped > 7)) {
1004                         /*
1005                          * Unmap the skb->data area, or the
1006                          * external sglist (AKA the Outbound
1007                          * Address List (OAL)).
1008                          * If its the zeroeth element, then it's
1009                          * the skb->data area.  If it's the 7th
1010                          * element and there is more than 6 frags,
1011                          * then its an OAL.
1012                          */
1013                         if (i == 7) {
1014                                 QPRINTK(qdev, TX_DONE, DEBUG,
1015                                         "unmapping OAL area.\n");
1016                         }
1017                         pci_unmap_single(qdev->pdev,
1018                                          pci_unmap_addr(&tx_ring_desc->map[i],
1019                                                         mapaddr),
1020                                          pci_unmap_len(&tx_ring_desc->map[i],
1021                                                        maplen),
1022                                          PCI_DMA_TODEVICE);
1023                 } else {
1024                         QPRINTK(qdev, TX_DONE, DEBUG, "unmapping frag %d.\n",
1025                                 i);
1026                         pci_unmap_page(qdev->pdev,
1027                                        pci_unmap_addr(&tx_ring_desc->map[i],
1028                                                       mapaddr),
1029                                        pci_unmap_len(&tx_ring_desc->map[i],
1030                                                      maplen), PCI_DMA_TODEVICE);
1031                 }
1032         }
1033
1034 }
1035
1036 /* Map the buffers for this transmit.  This will return
1037  * NETDEV_TX_BUSY or NETDEV_TX_OK based on success.
1038  */
1039 static int ql_map_send(struct ql_adapter *qdev,
1040                        struct ob_mac_iocb_req *mac_iocb_ptr,
1041                        struct sk_buff *skb, struct tx_ring_desc *tx_ring_desc)
1042 {
1043         int len = skb_headlen(skb);
1044         dma_addr_t map;
1045         int frag_idx, err, map_idx = 0;
1046         struct tx_buf_desc *tbd = mac_iocb_ptr->tbd;
1047         int frag_cnt = skb_shinfo(skb)->nr_frags;
1048
1049         if (frag_cnt) {
1050                 QPRINTK(qdev, TX_QUEUED, DEBUG, "frag_cnt = %d.\n", frag_cnt);
1051         }
1052         /*
1053          * Map the skb buffer first.
1054          */
1055         map = pci_map_single(qdev->pdev, skb->data, len, PCI_DMA_TODEVICE);
1056
1057         err = pci_dma_mapping_error(qdev->pdev, map);
1058         if (err) {
1059                 QPRINTK(qdev, TX_QUEUED, ERR,
1060                         "PCI mapping failed with error: %d\n", err);
1061
1062                 return NETDEV_TX_BUSY;
1063         }
1064
1065         tbd->len = cpu_to_le32(len);
1066         tbd->addr = cpu_to_le64(map);
1067         pci_unmap_addr_set(&tx_ring_desc->map[map_idx], mapaddr, map);
1068         pci_unmap_len_set(&tx_ring_desc->map[map_idx], maplen, len);
1069         map_idx++;
1070
1071         /*
1072          * This loop fills the remainder of the 8 address descriptors
1073          * in the IOCB.  If there are more than 7 fragments, then the
1074          * eighth address desc will point to an external list (OAL).
1075          * When this happens, the remainder of the frags will be stored
1076          * in this list.
1077          */
1078         for (frag_idx = 0; frag_idx < frag_cnt; frag_idx++, map_idx++) {
1079                 skb_frag_t *frag = &skb_shinfo(skb)->frags[frag_idx];
1080                 tbd++;
1081                 if (frag_idx == 6 && frag_cnt > 7) {
1082                         /* Let's tack on an sglist.
1083                          * Our control block will now
1084                          * look like this:
1085                          * iocb->seg[0] = skb->data
1086                          * iocb->seg[1] = frag[0]
1087                          * iocb->seg[2] = frag[1]
1088                          * iocb->seg[3] = frag[2]
1089                          * iocb->seg[4] = frag[3]
1090                          * iocb->seg[5] = frag[4]
1091                          * iocb->seg[6] = frag[5]
1092                          * iocb->seg[7] = ptr to OAL (external sglist)
1093                          * oal->seg[0] = frag[6]
1094                          * oal->seg[1] = frag[7]
1095                          * oal->seg[2] = frag[8]
1096                          * oal->seg[3] = frag[9]
1097                          * oal->seg[4] = frag[10]
1098                          *      etc...
1099                          */
1100                         /* Tack on the OAL in the eighth segment of IOCB. */
1101                         map = pci_map_single(qdev->pdev, &tx_ring_desc->oal,
1102                                              sizeof(struct oal),
1103                                              PCI_DMA_TODEVICE);
1104                         err = pci_dma_mapping_error(qdev->pdev, map);
1105                         if (err) {
1106                                 QPRINTK(qdev, TX_QUEUED, ERR,
1107                                         "PCI mapping outbound address list with error: %d\n",
1108                                         err);
1109                                 goto map_error;
1110                         }
1111
1112                         tbd->addr = cpu_to_le64(map);
1113                         /*
1114                          * The length is the number of fragments
1115                          * that remain to be mapped times the length
1116                          * of our sglist (OAL).
1117                          */
1118                         tbd->len =
1119                             cpu_to_le32((sizeof(struct tx_buf_desc) *
1120                                          (frag_cnt - frag_idx)) | TX_DESC_C);
1121                         pci_unmap_addr_set(&tx_ring_desc->map[map_idx], mapaddr,
1122                                            map);
1123                         pci_unmap_len_set(&tx_ring_desc->map[map_idx], maplen,
1124                                           sizeof(struct oal));
1125                         tbd = (struct tx_buf_desc *)&tx_ring_desc->oal;
1126                         map_idx++;
1127                 }
1128
1129                 map =
1130                     pci_map_page(qdev->pdev, frag->page,
1131                                  frag->page_offset, frag->size,
1132                                  PCI_DMA_TODEVICE);
1133
1134                 err = pci_dma_mapping_error(qdev->pdev, map);
1135                 if (err) {
1136                         QPRINTK(qdev, TX_QUEUED, ERR,
1137                                 "PCI mapping frags failed with error: %d.\n",
1138                                 err);
1139                         goto map_error;
1140                 }
1141
1142                 tbd->addr = cpu_to_le64(map);
1143                 tbd->len = cpu_to_le32(frag->size);
1144                 pci_unmap_addr_set(&tx_ring_desc->map[map_idx], mapaddr, map);
1145                 pci_unmap_len_set(&tx_ring_desc->map[map_idx], maplen,
1146                                   frag->size);
1147
1148         }
1149         /* Save the number of segments we've mapped. */
1150         tx_ring_desc->map_cnt = map_idx;
1151         /* Terminate the last segment. */
1152         tbd->len = cpu_to_le32(le32_to_cpu(tbd->len) | TX_DESC_E);
1153         return NETDEV_TX_OK;
1154
1155 map_error:
1156         /*
1157          * If the first frag mapping failed, then i will be zero.
1158          * This causes the unmap of the skb->data area.  Otherwise
1159          * we pass in the number of frags that mapped successfully
1160          * so they can be umapped.
1161          */
1162         ql_unmap_send(qdev, tx_ring_desc, map_idx);
1163         return NETDEV_TX_BUSY;
1164 }
1165
1166 static void ql_realign_skb(struct sk_buff *skb, int len)
1167 {
1168         void *temp_addr = skb->data;
1169
1170         /* Undo the skb_reserve(skb,32) we did before
1171          * giving to hardware, and realign data on
1172          * a 2-byte boundary.
1173          */
1174         skb->data -= QLGE_SB_PAD - NET_IP_ALIGN;
1175         skb->tail -= QLGE_SB_PAD - NET_IP_ALIGN;
1176         skb_copy_to_linear_data(skb, temp_addr,
1177                 (unsigned int)len);
1178 }
1179
1180 /*
1181  * This function builds an skb for the given inbound
1182  * completion.  It will be rewritten for readability in the near
1183  * future, but for not it works well.
1184  */
1185 static struct sk_buff *ql_build_rx_skb(struct ql_adapter *qdev,
1186                                        struct rx_ring *rx_ring,
1187                                        struct ib_mac_iocb_rsp *ib_mac_rsp)
1188 {
1189         struct bq_desc *lbq_desc;
1190         struct bq_desc *sbq_desc;
1191         struct sk_buff *skb = NULL;
1192         u32 length = le32_to_cpu(ib_mac_rsp->data_len);
1193        u32 hdr_len = le32_to_cpu(ib_mac_rsp->hdr_len);
1194
1195         /*
1196          * Handle the header buffer if present.
1197          */
1198         if (ib_mac_rsp->flags4 & IB_MAC_IOCB_RSP_HV &&
1199             ib_mac_rsp->flags4 & IB_MAC_IOCB_RSP_HS) {
1200                 QPRINTK(qdev, RX_STATUS, DEBUG, "Header of %d bytes in small buffer.\n", hdr_len);
1201                 /*
1202                  * Headers fit nicely into a small buffer.
1203                  */
1204                 sbq_desc = ql_get_curr_sbuf(rx_ring);
1205                 pci_unmap_single(qdev->pdev,
1206                                 pci_unmap_addr(sbq_desc, mapaddr),
1207                                 pci_unmap_len(sbq_desc, maplen),
1208                                 PCI_DMA_FROMDEVICE);
1209                 skb = sbq_desc->p.skb;
1210                 ql_realign_skb(skb, hdr_len);
1211                 skb_put(skb, hdr_len);
1212                 sbq_desc->p.skb = NULL;
1213         }
1214
1215         /*
1216          * Handle the data buffer(s).
1217          */
1218         if (unlikely(!length)) {        /* Is there data too? */
1219                 QPRINTK(qdev, RX_STATUS, DEBUG,
1220                         "No Data buffer in this packet.\n");
1221                 return skb;
1222         }
1223
1224         if (ib_mac_rsp->flags3 & IB_MAC_IOCB_RSP_DS) {
1225                 if (ib_mac_rsp->flags4 & IB_MAC_IOCB_RSP_HS) {
1226                         QPRINTK(qdev, RX_STATUS, DEBUG,
1227                                 "Headers in small, data of %d bytes in small, combine them.\n", length);
1228                         /*
1229                          * Data is less than small buffer size so it's
1230                          * stuffed in a small buffer.
1231                          * For this case we append the data
1232                          * from the "data" small buffer to the "header" small
1233                          * buffer.
1234                          */
1235                         sbq_desc = ql_get_curr_sbuf(rx_ring);
1236                         pci_dma_sync_single_for_cpu(qdev->pdev,
1237                                                     pci_unmap_addr
1238                                                     (sbq_desc, mapaddr),
1239                                                     pci_unmap_len
1240                                                     (sbq_desc, maplen),
1241                                                     PCI_DMA_FROMDEVICE);
1242                         memcpy(skb_put(skb, length),
1243                                sbq_desc->p.skb->data, length);
1244                         pci_dma_sync_single_for_device(qdev->pdev,
1245                                                        pci_unmap_addr
1246                                                        (sbq_desc,
1247                                                         mapaddr),
1248                                                        pci_unmap_len
1249                                                        (sbq_desc,
1250                                                         maplen),
1251                                                        PCI_DMA_FROMDEVICE);
1252                 } else {
1253                         QPRINTK(qdev, RX_STATUS, DEBUG,
1254                                 "%d bytes in a single small buffer.\n", length);
1255                         sbq_desc = ql_get_curr_sbuf(rx_ring);
1256                         skb = sbq_desc->p.skb;
1257                         ql_realign_skb(skb, length);
1258                         skb_put(skb, length);
1259                         pci_unmap_single(qdev->pdev,
1260                                          pci_unmap_addr(sbq_desc,
1261                                                         mapaddr),
1262                                          pci_unmap_len(sbq_desc,
1263                                                        maplen),
1264                                          PCI_DMA_FROMDEVICE);
1265                         sbq_desc->p.skb = NULL;
1266                 }
1267         } else if (ib_mac_rsp->flags3 & IB_MAC_IOCB_RSP_DL) {
1268                 if (ib_mac_rsp->flags4 & IB_MAC_IOCB_RSP_HS) {
1269                         QPRINTK(qdev, RX_STATUS, DEBUG,
1270                                 "Header in small, %d bytes in large. Chain large to small!\n", length);
1271                         /*
1272                          * The data is in a single large buffer.  We
1273                          * chain it to the header buffer's skb and let
1274                          * it rip.
1275                          */
1276                         lbq_desc = ql_get_curr_lbuf(rx_ring);
1277                         pci_unmap_page(qdev->pdev,
1278                                        pci_unmap_addr(lbq_desc,
1279                                                       mapaddr),
1280                                        pci_unmap_len(lbq_desc, maplen),
1281                                        PCI_DMA_FROMDEVICE);
1282                         QPRINTK(qdev, RX_STATUS, DEBUG,
1283                                 "Chaining page to skb.\n");
1284                         skb_fill_page_desc(skb, 0, lbq_desc->p.lbq_page,
1285                                            0, length);
1286                         skb->len += length;
1287                         skb->data_len += length;
1288                         skb->truesize += length;
1289                         lbq_desc->p.lbq_page = NULL;
1290                 } else {
1291                         /*
1292                          * The headers and data are in a single large buffer. We
1293                          * copy it to a new skb and let it go. This can happen with
1294                          * jumbo mtu on a non-TCP/UDP frame.
1295                          */
1296                         lbq_desc = ql_get_curr_lbuf(rx_ring);
1297                         skb = netdev_alloc_skb(qdev->ndev, length);
1298                         if (skb == NULL) {
1299                                 QPRINTK(qdev, PROBE, DEBUG,
1300                                         "No skb available, drop the packet.\n");
1301                                 return NULL;
1302                         }
1303                         pci_unmap_page(qdev->pdev,
1304                                        pci_unmap_addr(lbq_desc,
1305                                                       mapaddr),
1306                                        pci_unmap_len(lbq_desc, maplen),
1307                                        PCI_DMA_FROMDEVICE);
1308                         skb_reserve(skb, NET_IP_ALIGN);
1309                         QPRINTK(qdev, RX_STATUS, DEBUG,
1310                                 "%d bytes of headers and data in large. Chain page to new skb and pull tail.\n", length);
1311                         skb_fill_page_desc(skb, 0, lbq_desc->p.lbq_page,
1312                                            0, length);
1313                         skb->len += length;
1314                         skb->data_len += length;
1315                         skb->truesize += length;
1316                         length -= length;
1317                         lbq_desc->p.lbq_page = NULL;
1318                         __pskb_pull_tail(skb,
1319                                 (ib_mac_rsp->flags2 & IB_MAC_IOCB_RSP_V) ?
1320                                 VLAN_ETH_HLEN : ETH_HLEN);
1321                 }
1322         } else {
1323                 /*
1324                  * The data is in a chain of large buffers
1325                  * pointed to by a small buffer.  We loop
1326                  * thru and chain them to the our small header
1327                  * buffer's skb.
1328                  * frags:  There are 18 max frags and our small
1329                  *         buffer will hold 32 of them. The thing is,
1330                  *         we'll use 3 max for our 9000 byte jumbo
1331                  *         frames.  If the MTU goes up we could
1332                  *          eventually be in trouble.
1333                  */
1334                 int size, offset, i = 0;
1335                 __le64 *bq, bq_array[8];
1336                 sbq_desc = ql_get_curr_sbuf(rx_ring);
1337                 pci_unmap_single(qdev->pdev,
1338                                  pci_unmap_addr(sbq_desc, mapaddr),
1339                                  pci_unmap_len(sbq_desc, maplen),
1340                                  PCI_DMA_FROMDEVICE);
1341                 if (!(ib_mac_rsp->flags4 & IB_MAC_IOCB_RSP_HS)) {
1342                         /*
1343                          * This is an non TCP/UDP IP frame, so
1344                          * the headers aren't split into a small
1345                          * buffer.  We have to use the small buffer
1346                          * that contains our sg list as our skb to
1347                          * send upstairs. Copy the sg list here to
1348                          * a local buffer and use it to find the
1349                          * pages to chain.
1350                          */
1351                         QPRINTK(qdev, RX_STATUS, DEBUG,
1352                                 "%d bytes of headers & data in chain of large.\n", length);
1353                         skb = sbq_desc->p.skb;
1354                         bq = &bq_array[0];
1355                         memcpy(bq, skb->data, sizeof(bq_array));
1356                         sbq_desc->p.skb = NULL;
1357                         skb_reserve(skb, NET_IP_ALIGN);
1358                 } else {
1359                         QPRINTK(qdev, RX_STATUS, DEBUG,
1360                                 "Headers in small, %d bytes of data in chain of large.\n", length);
1361                         bq = (__le64 *)sbq_desc->p.skb->data;
1362                 }
1363                 while (length > 0) {
1364                         lbq_desc = ql_get_curr_lbuf(rx_ring);
1365                         pci_unmap_page(qdev->pdev,
1366                                        pci_unmap_addr(lbq_desc,
1367                                                       mapaddr),
1368                                        pci_unmap_len(lbq_desc,
1369                                                      maplen),
1370                                        PCI_DMA_FROMDEVICE);
1371                         size = (length < PAGE_SIZE) ? length : PAGE_SIZE;
1372                         offset = 0;
1373
1374                         QPRINTK(qdev, RX_STATUS, DEBUG,
1375                                 "Adding page %d to skb for %d bytes.\n",
1376                                 i, size);
1377                         skb_fill_page_desc(skb, i, lbq_desc->p.lbq_page,
1378                                            offset, size);
1379                         skb->len += size;
1380                         skb->data_len += size;
1381                         skb->truesize += size;
1382                         length -= size;
1383                         lbq_desc->p.lbq_page = NULL;
1384                         bq++;
1385                         i++;
1386                 }
1387                 __pskb_pull_tail(skb, (ib_mac_rsp->flags2 & IB_MAC_IOCB_RSP_V) ?
1388                                 VLAN_ETH_HLEN : ETH_HLEN);
1389         }
1390         return skb;
1391 }
1392
1393 /* Process an inbound completion from an rx ring. */
1394 static void ql_process_mac_rx_intr(struct ql_adapter *qdev,
1395                                    struct rx_ring *rx_ring,
1396                                    struct ib_mac_iocb_rsp *ib_mac_rsp)
1397 {
1398         struct net_device *ndev = qdev->ndev;
1399         struct sk_buff *skb = NULL;
1400
1401         QL_DUMP_IB_MAC_RSP(ib_mac_rsp);
1402
1403         skb = ql_build_rx_skb(qdev, rx_ring, ib_mac_rsp);
1404         if (unlikely(!skb)) {
1405                 QPRINTK(qdev, RX_STATUS, DEBUG,
1406                         "No skb available, drop packet.\n");
1407                 return;
1408         }
1409
1410         prefetch(skb->data);
1411         skb->dev = ndev;
1412         if (ib_mac_rsp->flags1 & IB_MAC_IOCB_RSP_M_MASK) {
1413                 QPRINTK(qdev, RX_STATUS, DEBUG, "%s%s%s Multicast.\n",
1414                         (ib_mac_rsp->flags1 & IB_MAC_IOCB_RSP_M_MASK) ==
1415                         IB_MAC_IOCB_RSP_M_HASH ? "Hash" : "",
1416                         (ib_mac_rsp->flags1 & IB_MAC_IOCB_RSP_M_MASK) ==
1417                         IB_MAC_IOCB_RSP_M_REG ? "Registered" : "",
1418                         (ib_mac_rsp->flags1 & IB_MAC_IOCB_RSP_M_MASK) ==
1419                         IB_MAC_IOCB_RSP_M_PROM ? "Promiscuous" : "");
1420         }
1421         if (ib_mac_rsp->flags2 & IB_MAC_IOCB_RSP_P) {
1422                 QPRINTK(qdev, RX_STATUS, DEBUG, "Promiscuous Packet.\n");
1423         }
1424         if (ib_mac_rsp->flags1 & (IB_MAC_IOCB_RSP_IE | IB_MAC_IOCB_RSP_TE)) {
1425                 QPRINTK(qdev, RX_STATUS, ERR,
1426                         "Bad checksum for this %s packet.\n",
1427                         ((ib_mac_rsp->
1428                           flags2 & IB_MAC_IOCB_RSP_T) ? "TCP" : "UDP"));
1429                 skb->ip_summed = CHECKSUM_NONE;
1430         } else if (qdev->rx_csum &&
1431                    ((ib_mac_rsp->flags2 & IB_MAC_IOCB_RSP_T) ||
1432                     ((ib_mac_rsp->flags2 & IB_MAC_IOCB_RSP_U) &&
1433                      !(ib_mac_rsp->flags1 & IB_MAC_IOCB_RSP_NU)))) {
1434                 QPRINTK(qdev, RX_STATUS, DEBUG, "RX checksum done!\n");
1435                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1436         }
1437         qdev->stats.rx_packets++;
1438         qdev->stats.rx_bytes += skb->len;
1439         skb->protocol = eth_type_trans(skb, ndev);
1440         if (qdev->vlgrp && (ib_mac_rsp->flags2 & IB_MAC_IOCB_RSP_V)) {
1441                 QPRINTK(qdev, RX_STATUS, DEBUG,
1442                         "Passing a VLAN packet upstream.\n");
1443                 vlan_hwaccel_rx(skb, qdev->vlgrp,
1444                                 le16_to_cpu(ib_mac_rsp->vlan_id));
1445         } else {
1446                 QPRINTK(qdev, RX_STATUS, DEBUG,
1447                         "Passing a normal packet upstream.\n");
1448                 netif_rx(skb);
1449         }
1450 }
1451
1452 /* Process an outbound completion from an rx ring. */
1453 static void ql_process_mac_tx_intr(struct ql_adapter *qdev,
1454                                    struct ob_mac_iocb_rsp *mac_rsp)
1455 {
1456         struct tx_ring *tx_ring;
1457         struct tx_ring_desc *tx_ring_desc;
1458
1459         QL_DUMP_OB_MAC_RSP(mac_rsp);
1460         tx_ring = &qdev->tx_ring[mac_rsp->txq_idx];
1461         tx_ring_desc = &tx_ring->q[mac_rsp->tid];
1462         ql_unmap_send(qdev, tx_ring_desc, tx_ring_desc->map_cnt);
1463         qdev->stats.tx_bytes += tx_ring_desc->map_cnt;
1464         qdev->stats.tx_packets++;
1465         dev_kfree_skb(tx_ring_desc->skb);
1466         tx_ring_desc->skb = NULL;
1467
1468         if (unlikely(mac_rsp->flags1 & (OB_MAC_IOCB_RSP_E |
1469                                         OB_MAC_IOCB_RSP_S |
1470                                         OB_MAC_IOCB_RSP_L |
1471                                         OB_MAC_IOCB_RSP_P | OB_MAC_IOCB_RSP_B))) {
1472                 if (mac_rsp->flags1 & OB_MAC_IOCB_RSP_E) {
1473                         QPRINTK(qdev, TX_DONE, WARNING,
1474                                 "Total descriptor length did not match transfer length.\n");
1475                 }
1476                 if (mac_rsp->flags1 & OB_MAC_IOCB_RSP_S) {
1477                         QPRINTK(qdev, TX_DONE, WARNING,
1478                                 "Frame too short to be legal, not sent.\n");
1479                 }
1480                 if (mac_rsp->flags1 & OB_MAC_IOCB_RSP_L) {
1481                         QPRINTK(qdev, TX_DONE, WARNING,
1482                                 "Frame too long, but sent anyway.\n");
1483                 }
1484                 if (mac_rsp->flags1 & OB_MAC_IOCB_RSP_B) {
1485                         QPRINTK(qdev, TX_DONE, WARNING,
1486                                 "PCI backplane error. Frame not sent.\n");
1487                 }
1488         }
1489         atomic_inc(&tx_ring->tx_count);
1490 }
1491
1492 /* Fire up a handler to reset the MPI processor. */
1493 void ql_queue_fw_error(struct ql_adapter *qdev)
1494 {
1495         netif_stop_queue(qdev->ndev);
1496         netif_carrier_off(qdev->ndev);
1497         queue_delayed_work(qdev->workqueue, &qdev->mpi_reset_work, 0);
1498 }
1499
1500 void ql_queue_asic_error(struct ql_adapter *qdev)
1501 {
1502         netif_stop_queue(qdev->ndev);
1503         netif_carrier_off(qdev->ndev);
1504         ql_disable_interrupts(qdev);
1505         queue_delayed_work(qdev->workqueue, &qdev->asic_reset_work, 0);
1506 }
1507
1508 static void ql_process_chip_ae_intr(struct ql_adapter *qdev,
1509                                     struct ib_ae_iocb_rsp *ib_ae_rsp)
1510 {
1511         switch (ib_ae_rsp->event) {
1512         case MGMT_ERR_EVENT:
1513                 QPRINTK(qdev, RX_ERR, ERR,
1514                         "Management Processor Fatal Error.\n");
1515                 ql_queue_fw_error(qdev);
1516                 return;
1517
1518         case CAM_LOOKUP_ERR_EVENT:
1519                 QPRINTK(qdev, LINK, ERR,
1520                         "Multiple CAM hits lookup occurred.\n");
1521                 QPRINTK(qdev, DRV, ERR, "This event shouldn't occur.\n");
1522                 ql_queue_asic_error(qdev);
1523                 return;
1524
1525         case SOFT_ECC_ERROR_EVENT:
1526                 QPRINTK(qdev, RX_ERR, ERR, "Soft ECC error detected.\n");
1527                 ql_queue_asic_error(qdev);
1528                 break;
1529
1530         case PCI_ERR_ANON_BUF_RD:
1531                 QPRINTK(qdev, RX_ERR, ERR,
1532                         "PCI error occurred when reading anonymous buffers from rx_ring %d.\n",
1533                         ib_ae_rsp->q_id);
1534                 ql_queue_asic_error(qdev);
1535                 break;
1536
1537         default:
1538                 QPRINTK(qdev, DRV, ERR, "Unexpected event %d.\n",
1539                         ib_ae_rsp->event);
1540                 ql_queue_asic_error(qdev);
1541                 break;
1542         }
1543 }
1544
1545 static int ql_clean_outbound_rx_ring(struct rx_ring *rx_ring)
1546 {
1547         struct ql_adapter *qdev = rx_ring->qdev;
1548         u32 prod = le32_to_cpu(*rx_ring->prod_idx_sh_reg);
1549         struct ob_mac_iocb_rsp *net_rsp = NULL;
1550         int count = 0;
1551
1552         /* While there are entries in the completion queue. */
1553         while (prod != rx_ring->cnsmr_idx) {
1554
1555                 QPRINTK(qdev, RX_STATUS, DEBUG,
1556                         "cq_id = %d, prod = %d, cnsmr = %d.\n.", rx_ring->cq_id,
1557                         prod, rx_ring->cnsmr_idx);
1558
1559                 net_rsp = (struct ob_mac_iocb_rsp *)rx_ring->curr_entry;
1560                 rmb();
1561                 switch (net_rsp->opcode) {
1562
1563                 case OPCODE_OB_MAC_TSO_IOCB:
1564                 case OPCODE_OB_MAC_IOCB:
1565                         ql_process_mac_tx_intr(qdev, net_rsp);
1566                         break;
1567                 default:
1568                         QPRINTK(qdev, RX_STATUS, DEBUG,
1569                                 "Hit default case, not handled! dropping the packet, opcode = %x.\n",
1570                                 net_rsp->opcode);
1571                 }
1572                 count++;
1573                 ql_update_cq(rx_ring);
1574                 prod = le32_to_cpu(*rx_ring->prod_idx_sh_reg);
1575         }
1576         ql_write_cq_idx(rx_ring);
1577         if (netif_queue_stopped(qdev->ndev) && net_rsp != NULL) {
1578                 struct tx_ring *tx_ring = &qdev->tx_ring[net_rsp->txq_idx];
1579                 if (atomic_read(&tx_ring->queue_stopped) &&
1580                     (atomic_read(&tx_ring->tx_count) > (tx_ring->wq_len / 4)))
1581                         /*
1582                          * The queue got stopped because the tx_ring was full.
1583                          * Wake it up, because it's now at least 25% empty.
1584                          */
1585                         netif_wake_queue(qdev->ndev);
1586         }
1587
1588         return count;
1589 }
1590
1591 static int ql_clean_inbound_rx_ring(struct rx_ring *rx_ring, int budget)
1592 {
1593         struct ql_adapter *qdev = rx_ring->qdev;
1594         u32 prod = le32_to_cpu(*rx_ring->prod_idx_sh_reg);
1595         struct ql_net_rsp_iocb *net_rsp;
1596         int count = 0;
1597
1598         /* While there are entries in the completion queue. */
1599         while (prod != rx_ring->cnsmr_idx) {
1600
1601                 QPRINTK(qdev, RX_STATUS, DEBUG,
1602                         "cq_id = %d, prod = %d, cnsmr = %d.\n.", rx_ring->cq_id,
1603                         prod, rx_ring->cnsmr_idx);
1604
1605                 net_rsp = rx_ring->curr_entry;
1606                 rmb();
1607                 switch (net_rsp->opcode) {
1608                 case OPCODE_IB_MAC_IOCB:
1609                         ql_process_mac_rx_intr(qdev, rx_ring,
1610                                                (struct ib_mac_iocb_rsp *)
1611                                                net_rsp);
1612                         break;
1613
1614                 case OPCODE_IB_AE_IOCB:
1615                         ql_process_chip_ae_intr(qdev, (struct ib_ae_iocb_rsp *)
1616                                                 net_rsp);
1617                         break;
1618                 default:
1619                         {
1620                                 QPRINTK(qdev, RX_STATUS, DEBUG,
1621                                         "Hit default case, not handled! dropping the packet, opcode = %x.\n",
1622                                         net_rsp->opcode);
1623                         }
1624                 }
1625                 count++;
1626                 ql_update_cq(rx_ring);
1627                 prod = le32_to_cpu(*rx_ring->prod_idx_sh_reg);
1628                 if (count == budget)
1629                         break;
1630         }
1631         ql_update_buffer_queues(qdev, rx_ring);
1632         ql_write_cq_idx(rx_ring);
1633         return count;
1634 }
1635
1636 static int ql_napi_poll_msix(struct napi_struct *napi, int budget)
1637 {
1638         struct rx_ring *rx_ring = container_of(napi, struct rx_ring, napi);
1639         struct ql_adapter *qdev = rx_ring->qdev;
1640         int work_done = ql_clean_inbound_rx_ring(rx_ring, budget);
1641
1642         QPRINTK(qdev, RX_STATUS, DEBUG, "Enter, NAPI POLL cq_id = %d.\n",
1643                 rx_ring->cq_id);
1644
1645         if (work_done < budget) {
1646                 __netif_rx_complete(napi);
1647                 ql_enable_completion_interrupt(qdev, rx_ring->irq);
1648         }
1649         return work_done;
1650 }
1651
1652 static void ql_vlan_rx_register(struct net_device *ndev, struct vlan_group *grp)
1653 {
1654         struct ql_adapter *qdev = netdev_priv(ndev);
1655
1656         qdev->vlgrp = grp;
1657         if (grp) {
1658                 QPRINTK(qdev, IFUP, DEBUG, "Turning on VLAN in NIC_RCV_CFG.\n");
1659                 ql_write32(qdev, NIC_RCV_CFG, NIC_RCV_CFG_VLAN_MASK |
1660                            NIC_RCV_CFG_VLAN_MATCH_AND_NON);
1661         } else {
1662                 QPRINTK(qdev, IFUP, DEBUG,
1663                         "Turning off VLAN in NIC_RCV_CFG.\n");
1664                 ql_write32(qdev, NIC_RCV_CFG, NIC_RCV_CFG_VLAN_MASK);
1665         }
1666 }
1667
1668 static void ql_vlan_rx_add_vid(struct net_device *ndev, u16 vid)
1669 {
1670         struct ql_adapter *qdev = netdev_priv(ndev);
1671         u32 enable_bit = MAC_ADDR_E;
1672
1673         spin_lock(&qdev->hw_lock);
1674         if (ql_set_mac_addr_reg
1675             (qdev, (u8 *) &enable_bit, MAC_ADDR_TYPE_VLAN, vid)) {
1676                 QPRINTK(qdev, IFUP, ERR, "Failed to init vlan address.\n");
1677         }
1678         spin_unlock(&qdev->hw_lock);
1679 }
1680
1681 static void ql_vlan_rx_kill_vid(struct net_device *ndev, u16 vid)
1682 {
1683         struct ql_adapter *qdev = netdev_priv(ndev);
1684         u32 enable_bit = 0;
1685
1686         spin_lock(&qdev->hw_lock);
1687         if (ql_set_mac_addr_reg
1688             (qdev, (u8 *) &enable_bit, MAC_ADDR_TYPE_VLAN, vid)) {
1689                 QPRINTK(qdev, IFUP, ERR, "Failed to clear vlan address.\n");
1690         }
1691         spin_unlock(&qdev->hw_lock);
1692
1693 }
1694
1695 /* Worker thread to process a given rx_ring that is dedicated
1696  * to outbound completions.
1697  */
1698 static void ql_tx_clean(struct work_struct *work)
1699 {
1700         struct rx_ring *rx_ring =
1701             container_of(work, struct rx_ring, rx_work.work);
1702         ql_clean_outbound_rx_ring(rx_ring);
1703         ql_enable_completion_interrupt(rx_ring->qdev, rx_ring->irq);
1704
1705 }
1706
1707 /* Worker thread to process a given rx_ring that is dedicated
1708  * to inbound completions.
1709  */
1710 static void ql_rx_clean(struct work_struct *work)
1711 {
1712         struct rx_ring *rx_ring =
1713             container_of(work, struct rx_ring, rx_work.work);
1714         ql_clean_inbound_rx_ring(rx_ring, 64);
1715         ql_enable_completion_interrupt(rx_ring->qdev, rx_ring->irq);
1716 }
1717
1718 /* MSI-X Multiple Vector Interrupt Handler for outbound completions. */
1719 static irqreturn_t qlge_msix_tx_isr(int irq, void *dev_id)
1720 {
1721         struct rx_ring *rx_ring = dev_id;
1722         queue_delayed_work_on(rx_ring->cpu, rx_ring->qdev->q_workqueue,
1723                               &rx_ring->rx_work, 0);
1724         return IRQ_HANDLED;
1725 }
1726
1727 /* MSI-X Multiple Vector Interrupt Handler for inbound completions. */
1728 static irqreturn_t qlge_msix_rx_isr(int irq, void *dev_id)
1729 {
1730         struct rx_ring *rx_ring = dev_id;
1731         netif_rx_schedule(&rx_ring->napi);
1732         return IRQ_HANDLED;
1733 }
1734
1735 /* This handles a fatal error, MPI activity, and the default
1736  * rx_ring in an MSI-X multiple vector environment.
1737  * In MSI/Legacy environment it also process the rest of
1738  * the rx_rings.
1739  */
1740 static irqreturn_t qlge_isr(int irq, void *dev_id)
1741 {
1742         struct rx_ring *rx_ring = dev_id;
1743         struct ql_adapter *qdev = rx_ring->qdev;
1744         struct intr_context *intr_context = &qdev->intr_context[0];
1745         u32 var;
1746         int i;
1747         int work_done = 0;
1748
1749         spin_lock(&qdev->hw_lock);
1750         if (atomic_read(&qdev->intr_context[0].irq_cnt)) {
1751                 QPRINTK(qdev, INTR, DEBUG, "Shared Interrupt, Not ours!\n");
1752                 spin_unlock(&qdev->hw_lock);
1753                 return IRQ_NONE;
1754         }
1755         spin_unlock(&qdev->hw_lock);
1756
1757         var = ql_disable_completion_interrupt(qdev, intr_context->intr);
1758
1759         /*
1760          * Check for fatal error.
1761          */
1762         if (var & STS_FE) {
1763                 ql_queue_asic_error(qdev);
1764                 QPRINTK(qdev, INTR, ERR, "Got fatal error, STS = %x.\n", var);
1765                 var = ql_read32(qdev, ERR_STS);
1766                 QPRINTK(qdev, INTR, ERR,
1767                         "Resetting chip. Error Status Register = 0x%x\n", var);
1768                 return IRQ_HANDLED;
1769         }
1770
1771         /*
1772          * Check MPI processor activity.
1773          */
1774         if (var & STS_PI) {
1775                 /*
1776                  * We've got an async event or mailbox completion.
1777                  * Handle it and clear the source of the interrupt.
1778                  */
1779                 QPRINTK(qdev, INTR, ERR, "Got MPI processor interrupt.\n");
1780                 ql_disable_completion_interrupt(qdev, intr_context->intr);
1781                 queue_delayed_work_on(smp_processor_id(), qdev->workqueue,
1782                                       &qdev->mpi_work, 0);
1783                 work_done++;
1784         }
1785
1786         /*
1787          * Check the default queue and wake handler if active.
1788          */
1789         rx_ring = &qdev->rx_ring[0];
1790         if (le32_to_cpu(*rx_ring->prod_idx_sh_reg) != rx_ring->cnsmr_idx) {
1791                 QPRINTK(qdev, INTR, INFO, "Waking handler for rx_ring[0].\n");
1792                 ql_disable_completion_interrupt(qdev, intr_context->intr);
1793                 queue_delayed_work_on(smp_processor_id(), qdev->q_workqueue,
1794                                       &rx_ring->rx_work, 0);
1795                 work_done++;
1796         }
1797
1798         if (!test_bit(QL_MSIX_ENABLED, &qdev->flags)) {
1799                 /*
1800                  * Start the DPC for each active queue.
1801                  */
1802                 for (i = 1; i < qdev->rx_ring_count; i++) {
1803                         rx_ring = &qdev->rx_ring[i];
1804                         if (le32_to_cpu(*rx_ring->prod_idx_sh_reg) !=
1805                             rx_ring->cnsmr_idx) {
1806                                 QPRINTK(qdev, INTR, INFO,
1807                                         "Waking handler for rx_ring[%d].\n", i);
1808                                 ql_disable_completion_interrupt(qdev,
1809                                                                 intr_context->
1810                                                                 intr);
1811                                 if (i < qdev->rss_ring_first_cq_id)
1812                                         queue_delayed_work_on(rx_ring->cpu,
1813                                                               qdev->q_workqueue,
1814                                                               &rx_ring->rx_work,
1815                                                               0);
1816                                 else
1817                                         netif_rx_schedule(&rx_ring->napi);
1818                                 work_done++;
1819                         }
1820                 }
1821         }
1822         ql_enable_completion_interrupt(qdev, intr_context->intr);
1823         return work_done ? IRQ_HANDLED : IRQ_NONE;
1824 }
1825
1826 static int ql_tso(struct sk_buff *skb, struct ob_mac_tso_iocb_req *mac_iocb_ptr)
1827 {
1828
1829         if (skb_is_gso(skb)) {
1830                 int err;
1831                 if (skb_header_cloned(skb)) {
1832                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1833                         if (err)
1834                                 return err;
1835                 }
1836
1837                 mac_iocb_ptr->opcode = OPCODE_OB_MAC_TSO_IOCB;
1838                 mac_iocb_ptr->flags3 |= OB_MAC_TSO_IOCB_IC;
1839                 mac_iocb_ptr->frame_len = cpu_to_le32((u32) skb->len);
1840                 mac_iocb_ptr->total_hdrs_len =
1841                     cpu_to_le16(skb_transport_offset(skb) + tcp_hdrlen(skb));
1842                 mac_iocb_ptr->net_trans_offset =
1843                     cpu_to_le16(skb_network_offset(skb) |
1844                                 skb_transport_offset(skb)
1845                                 << OB_MAC_TRANSPORT_HDR_SHIFT);
1846                 mac_iocb_ptr->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
1847                 mac_iocb_ptr->flags2 |= OB_MAC_TSO_IOCB_LSO;
1848                 if (likely(skb->protocol == htons(ETH_P_IP))) {
1849                         struct iphdr *iph = ip_hdr(skb);
1850                         iph->check = 0;
1851                         mac_iocb_ptr->flags1 |= OB_MAC_TSO_IOCB_IP4;
1852                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1853                                                                  iph->daddr, 0,
1854                                                                  IPPROTO_TCP,
1855                                                                  0);
1856                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1857                         mac_iocb_ptr->flags1 |= OB_MAC_TSO_IOCB_IP6;
1858                         tcp_hdr(skb)->check =
1859                             ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
1860                                              &ipv6_hdr(skb)->daddr,
1861                                              0, IPPROTO_TCP, 0);
1862                 }
1863                 return 1;
1864         }
1865         return 0;
1866 }
1867
1868 static void ql_hw_csum_setup(struct sk_buff *skb,
1869                              struct ob_mac_tso_iocb_req *mac_iocb_ptr)
1870 {
1871         int len;
1872         struct iphdr *iph = ip_hdr(skb);
1873         __sum16 *check;
1874         mac_iocb_ptr->opcode = OPCODE_OB_MAC_TSO_IOCB;
1875         mac_iocb_ptr->frame_len = cpu_to_le32((u32) skb->len);
1876         mac_iocb_ptr->net_trans_offset =
1877                 cpu_to_le16(skb_network_offset(skb) |
1878                 skb_transport_offset(skb) << OB_MAC_TRANSPORT_HDR_SHIFT);
1879
1880         mac_iocb_ptr->flags1 |= OB_MAC_TSO_IOCB_IP4;
1881         len = (ntohs(iph->tot_len) - (iph->ihl << 2));
1882         if (likely(iph->protocol == IPPROTO_TCP)) {
1883                 check = &(tcp_hdr(skb)->check);
1884                 mac_iocb_ptr->flags2 |= OB_MAC_TSO_IOCB_TC;
1885                 mac_iocb_ptr->total_hdrs_len =
1886                     cpu_to_le16(skb_transport_offset(skb) +
1887                                 (tcp_hdr(skb)->doff << 2));
1888         } else {
1889                 check = &(udp_hdr(skb)->check);
1890                 mac_iocb_ptr->flags2 |= OB_MAC_TSO_IOCB_UC;
1891                 mac_iocb_ptr->total_hdrs_len =
1892                     cpu_to_le16(skb_transport_offset(skb) +
1893                                 sizeof(struct udphdr));
1894         }
1895         *check = ~csum_tcpudp_magic(iph->saddr,
1896                                     iph->daddr, len, iph->protocol, 0);
1897 }
1898
1899 static int qlge_send(struct sk_buff *skb, struct net_device *ndev)
1900 {
1901         struct tx_ring_desc *tx_ring_desc;
1902         struct ob_mac_iocb_req *mac_iocb_ptr;
1903         struct ql_adapter *qdev = netdev_priv(ndev);
1904         int tso;
1905         struct tx_ring *tx_ring;
1906         u32 tx_ring_idx = (u32) QL_TXQ_IDX(qdev, skb);
1907
1908         tx_ring = &qdev->tx_ring[tx_ring_idx];
1909
1910         if (unlikely(atomic_read(&tx_ring->tx_count) < 2)) {
1911                 QPRINTK(qdev, TX_QUEUED, INFO,
1912                         "%s: shutting down tx queue %d du to lack of resources.\n",
1913                         __func__, tx_ring_idx);
1914                 netif_stop_queue(ndev);
1915                 atomic_inc(&tx_ring->queue_stopped);
1916                 return NETDEV_TX_BUSY;
1917         }
1918         tx_ring_desc = &tx_ring->q[tx_ring->prod_idx];
1919         mac_iocb_ptr = tx_ring_desc->queue_entry;
1920         memset((void *)mac_iocb_ptr, 0, sizeof(mac_iocb_ptr));
1921         if (ql_map_send(qdev, mac_iocb_ptr, skb, tx_ring_desc) != NETDEV_TX_OK) {
1922                 QPRINTK(qdev, TX_QUEUED, ERR, "Could not map the segments.\n");
1923                 return NETDEV_TX_BUSY;
1924         }
1925
1926         mac_iocb_ptr->opcode = OPCODE_OB_MAC_IOCB;
1927         mac_iocb_ptr->tid = tx_ring_desc->index;
1928         /* We use the upper 32-bits to store the tx queue for this IO.
1929          * When we get the completion we can use it to establish the context.
1930          */
1931         mac_iocb_ptr->txq_idx = tx_ring_idx;
1932         tx_ring_desc->skb = skb;
1933
1934         mac_iocb_ptr->frame_len = cpu_to_le16((u16) skb->len);
1935
1936         if (qdev->vlgrp && vlan_tx_tag_present(skb)) {
1937                 QPRINTK(qdev, TX_QUEUED, DEBUG, "Adding a vlan tag %d.\n",
1938                         vlan_tx_tag_get(skb));
1939                 mac_iocb_ptr->flags3 |= OB_MAC_IOCB_V;
1940                 mac_iocb_ptr->vlan_tci = cpu_to_le16(vlan_tx_tag_get(skb));
1941         }
1942         tso = ql_tso(skb, (struct ob_mac_tso_iocb_req *)mac_iocb_ptr);
1943         if (tso < 0) {
1944                 dev_kfree_skb_any(skb);
1945                 return NETDEV_TX_OK;
1946         } else if (unlikely(!tso) && (skb->ip_summed == CHECKSUM_PARTIAL)) {
1947                 ql_hw_csum_setup(skb,
1948                                  (struct ob_mac_tso_iocb_req *)mac_iocb_ptr);
1949         }
1950         QL_DUMP_OB_MAC_IOCB(mac_iocb_ptr);
1951         tx_ring->prod_idx++;
1952         if (tx_ring->prod_idx == tx_ring->wq_len)
1953                 tx_ring->prod_idx = 0;
1954         wmb();
1955
1956         ql_write_db_reg(tx_ring->prod_idx, tx_ring->prod_idx_db_reg);
1957         ndev->trans_start = jiffies;
1958         QPRINTK(qdev, TX_QUEUED, DEBUG, "tx queued, slot %d, len %d\n",
1959                 tx_ring->prod_idx, skb->len);
1960
1961         atomic_dec(&tx_ring->tx_count);
1962         return NETDEV_TX_OK;
1963 }
1964
1965 static void ql_free_shadow_space(struct ql_adapter *qdev)
1966 {
1967         if (qdev->rx_ring_shadow_reg_area) {
1968                 pci_free_consistent(qdev->pdev,
1969                                     PAGE_SIZE,
1970                                     qdev->rx_ring_shadow_reg_area,
1971                                     qdev->rx_ring_shadow_reg_dma);
1972                 qdev->rx_ring_shadow_reg_area = NULL;
1973         }
1974         if (qdev->tx_ring_shadow_reg_area) {
1975                 pci_free_consistent(qdev->pdev,
1976                                     PAGE_SIZE,
1977                                     qdev->tx_ring_shadow_reg_area,
1978                                     qdev->tx_ring_shadow_reg_dma);
1979                 qdev->tx_ring_shadow_reg_area = NULL;
1980         }
1981 }
1982
1983 static int ql_alloc_shadow_space(struct ql_adapter *qdev)
1984 {
1985         qdev->rx_ring_shadow_reg_area =
1986             pci_alloc_consistent(qdev->pdev,
1987                                  PAGE_SIZE, &qdev->rx_ring_shadow_reg_dma);
1988         if (qdev->rx_ring_shadow_reg_area == NULL) {
1989                 QPRINTK(qdev, IFUP, ERR,
1990                         "Allocation of RX shadow space failed.\n");
1991                 return -ENOMEM;
1992         }
1993         qdev->tx_ring_shadow_reg_area =
1994             pci_alloc_consistent(qdev->pdev, PAGE_SIZE,
1995                                  &qdev->tx_ring_shadow_reg_dma);
1996         if (qdev->tx_ring_shadow_reg_area == NULL) {
1997                 QPRINTK(qdev, IFUP, ERR,
1998                         "Allocation of TX shadow space failed.\n");
1999                 goto err_wqp_sh_area;
2000         }
2001         return 0;
2002
2003 err_wqp_sh_area:
2004         pci_free_consistent(qdev->pdev,
2005                             PAGE_SIZE,
2006                             qdev->rx_ring_shadow_reg_area,
2007                             qdev->rx_ring_shadow_reg_dma);
2008         return -ENOMEM;
2009 }
2010
2011 static void ql_init_tx_ring(struct ql_adapter *qdev, struct tx_ring *tx_ring)
2012 {
2013         struct tx_ring_desc *tx_ring_desc;
2014         int i;
2015         struct ob_mac_iocb_req *mac_iocb_ptr;
2016
2017         mac_iocb_ptr = tx_ring->wq_base;
2018         tx_ring_desc = tx_ring->q;
2019         for (i = 0; i < tx_ring->wq_len; i++) {
2020                 tx_ring_desc->index = i;
2021                 tx_ring_desc->skb = NULL;
2022                 tx_ring_desc->queue_entry = mac_iocb_ptr;
2023                 mac_iocb_ptr++;
2024                 tx_ring_desc++;
2025         }
2026         atomic_set(&tx_ring->tx_count, tx_ring->wq_len);
2027         atomic_set(&tx_ring->queue_stopped, 0);
2028 }
2029
2030 static void ql_free_tx_resources(struct ql_adapter *qdev,
2031                                  struct tx_ring *tx_ring)
2032 {
2033         if (tx_ring->wq_base) {
2034                 pci_free_consistent(qdev->pdev, tx_ring->wq_size,
2035                                     tx_ring->wq_base, tx_ring->wq_base_dma);
2036                 tx_ring->wq_base = NULL;
2037         }
2038         kfree(tx_ring->q);
2039         tx_ring->q = NULL;
2040 }
2041
2042 static int ql_alloc_tx_resources(struct ql_adapter *qdev,
2043                                  struct tx_ring *tx_ring)
2044 {
2045         tx_ring->wq_base =
2046             pci_alloc_consistent(qdev->pdev, tx_ring->wq_size,
2047                                  &tx_ring->wq_base_dma);
2048
2049         if ((tx_ring->wq_base == NULL)
2050             || tx_ring->wq_base_dma & (tx_ring->wq_size - 1)) {
2051                 QPRINTK(qdev, IFUP, ERR, "tx_ring alloc failed.\n");
2052                 return -ENOMEM;
2053         }
2054         tx_ring->q =
2055             kmalloc(tx_ring->wq_len * sizeof(struct tx_ring_desc), GFP_KERNEL);
2056         if (tx_ring->q == NULL)
2057                 goto err;
2058
2059         return 0;
2060 err:
2061         pci_free_consistent(qdev->pdev, tx_ring->wq_size,
2062                             tx_ring->wq_base, tx_ring->wq_base_dma);
2063         return -ENOMEM;
2064 }
2065
2066 static void ql_free_lbq_buffers(struct ql_adapter *qdev, struct rx_ring *rx_ring)
2067 {
2068         int i;
2069         struct bq_desc *lbq_desc;
2070
2071         for (i = 0; i < rx_ring->lbq_len; i++) {
2072                 lbq_desc = &rx_ring->lbq[i];
2073                 if (lbq_desc->p.lbq_page) {
2074                         pci_unmap_page(qdev->pdev,
2075                                        pci_unmap_addr(lbq_desc, mapaddr),
2076                                        pci_unmap_len(lbq_desc, maplen),
2077                                        PCI_DMA_FROMDEVICE);
2078
2079                         put_page(lbq_desc->p.lbq_page);
2080                         lbq_desc->p.lbq_page = NULL;
2081                 }
2082         }
2083 }
2084
2085 /*
2086  * Allocate and map a page for each element of the lbq.
2087  */
2088 static int ql_alloc_lbq_buffers(struct ql_adapter *qdev,
2089                                 struct rx_ring *rx_ring)
2090 {
2091         int i;
2092         struct bq_desc *lbq_desc;
2093         u64 map;
2094         __le64 *bq = rx_ring->lbq_base;
2095
2096         for (i = 0; i < rx_ring->lbq_len; i++) {
2097                 lbq_desc = &rx_ring->lbq[i];
2098                 memset(lbq_desc, 0, sizeof(lbq_desc));
2099                 lbq_desc->addr = bq;
2100                 lbq_desc->index = i;
2101                 lbq_desc->p.lbq_page = alloc_page(GFP_ATOMIC);
2102                 if (unlikely(!lbq_desc->p.lbq_page)) {
2103                         QPRINTK(qdev, IFUP, ERR, "failed alloc_page().\n");
2104                         goto mem_error;
2105                 } else {
2106                         map = pci_map_page(qdev->pdev,
2107                                            lbq_desc->p.lbq_page,
2108                                            0, PAGE_SIZE, PCI_DMA_FROMDEVICE);
2109                         if (pci_dma_mapping_error(qdev->pdev, map)) {
2110                                 QPRINTK(qdev, IFUP, ERR,
2111                                         "PCI mapping failed.\n");
2112                                 goto mem_error;
2113                         }
2114                         pci_unmap_addr_set(lbq_desc, mapaddr, map);
2115                         pci_unmap_len_set(lbq_desc, maplen, PAGE_SIZE);
2116                         *lbq_desc->addr = cpu_to_le64(map);
2117                 }
2118                 bq++;
2119         }
2120         return 0;
2121 mem_error:
2122         ql_free_lbq_buffers(qdev, rx_ring);
2123         return -ENOMEM;
2124 }
2125
2126 static void ql_free_sbq_buffers(struct ql_adapter *qdev, struct rx_ring *rx_ring)
2127 {
2128         int i;
2129         struct bq_desc *sbq_desc;
2130
2131         for (i = 0; i < rx_ring->sbq_len; i++) {
2132                 sbq_desc = &rx_ring->sbq[i];
2133                 if (sbq_desc == NULL) {
2134                         QPRINTK(qdev, IFUP, ERR, "sbq_desc %d is NULL.\n", i);
2135                         return;
2136                 }
2137                 if (sbq_desc->p.skb) {
2138                         pci_unmap_single(qdev->pdev,
2139                                          pci_unmap_addr(sbq_desc, mapaddr),
2140                                          pci_unmap_len(sbq_desc, maplen),
2141                                          PCI_DMA_FROMDEVICE);
2142                         dev_kfree_skb(sbq_desc->p.skb);
2143                         sbq_desc->p.skb = NULL;
2144                 }
2145         }
2146 }
2147
2148 /* Allocate and map an skb for each element of the sbq. */
2149 static int ql_alloc_sbq_buffers(struct ql_adapter *qdev,
2150                                 struct rx_ring *rx_ring)
2151 {
2152         int i;
2153         struct bq_desc *sbq_desc;
2154         struct sk_buff *skb;
2155         u64 map;
2156         __le64 *bq = rx_ring->sbq_base;
2157
2158         for (i = 0; i < rx_ring->sbq_len; i++) {
2159                 sbq_desc = &rx_ring->sbq[i];
2160                 memset(sbq_desc, 0, sizeof(sbq_desc));
2161                 sbq_desc->index = i;
2162                 sbq_desc->addr = bq;
2163                 skb = netdev_alloc_skb(qdev->ndev, rx_ring->sbq_buf_size);
2164                 if (unlikely(!skb)) {
2165                         /* Better luck next round */
2166                         QPRINTK(qdev, IFUP, ERR,
2167                                 "small buff alloc failed for %d bytes at index %d.\n",
2168                                 rx_ring->sbq_buf_size, i);
2169                         goto mem_err;
2170                 }
2171                 skb_reserve(skb, QLGE_SB_PAD);
2172                 sbq_desc->p.skb = skb;
2173                 /*
2174                  * Map only half the buffer. Because the
2175                  * other half may get some data copied to it
2176                  * when the completion arrives.
2177                  */
2178                 map = pci_map_single(qdev->pdev,
2179                                      skb->data,
2180                                      rx_ring->sbq_buf_size / 2,
2181                                      PCI_DMA_FROMDEVICE);
2182                 if (pci_dma_mapping_error(qdev->pdev, map)) {
2183                         QPRINTK(qdev, IFUP, ERR, "PCI mapping failed.\n");
2184                         goto mem_err;
2185                 }
2186                 pci_unmap_addr_set(sbq_desc, mapaddr, map);
2187                 pci_unmap_len_set(sbq_desc, maplen, rx_ring->sbq_buf_size / 2);
2188                 *sbq_desc->addr = cpu_to_le64(map);
2189                 bq++;
2190         }
2191         return 0;
2192 mem_err:
2193         ql_free_sbq_buffers(qdev, rx_ring);
2194         return -ENOMEM;
2195 }
2196
2197 static void ql_free_rx_resources(struct ql_adapter *qdev,
2198                                  struct rx_ring *rx_ring)
2199 {
2200         if (rx_ring->sbq_len)
2201                 ql_free_sbq_buffers(qdev, rx_ring);
2202         if (rx_ring->lbq_len)
2203                 ql_free_lbq_buffers(qdev, rx_ring);
2204
2205         /* Free the small buffer queue. */
2206         if (rx_ring->sbq_base) {
2207                 pci_free_consistent(qdev->pdev,
2208                                     rx_ring->sbq_size,
2209                                     rx_ring->sbq_base, rx_ring->sbq_base_dma);
2210                 rx_ring->sbq_base = NULL;
2211         }
2212
2213         /* Free the small buffer queue control blocks. */
2214         kfree(rx_ring->sbq);
2215         rx_ring->sbq = NULL;
2216
2217         /* Free the large buffer queue. */
2218         if (rx_ring->lbq_base) {
2219                 pci_free_consistent(qdev->pdev,
2220                                     rx_ring->lbq_size,
2221                                     rx_ring->lbq_base, rx_ring->lbq_base_dma);
2222                 rx_ring->lbq_base = NULL;
2223         }
2224
2225         /* Free the large buffer queue control blocks. */
2226         kfree(rx_ring->lbq);
2227         rx_ring->lbq = NULL;
2228
2229         /* Free the rx queue. */
2230         if (rx_ring->cq_base) {
2231                 pci_free_consistent(qdev->pdev,
2232                                     rx_ring->cq_size,
2233                                     rx_ring->cq_base, rx_ring->cq_base_dma);
2234                 rx_ring->cq_base = NULL;
2235         }
2236 }
2237
2238 /* Allocate queues and buffers for this completions queue based
2239  * on the values in the parameter structure. */
2240 static int ql_alloc_rx_resources(struct ql_adapter *qdev,
2241                                  struct rx_ring *rx_ring)
2242 {
2243
2244         /*
2245          * Allocate the completion queue for this rx_ring.
2246          */
2247         rx_ring->cq_base =
2248             pci_alloc_consistent(qdev->pdev, rx_ring->cq_size,
2249                                  &rx_ring->cq_base_dma);
2250
2251         if (rx_ring->cq_base == NULL) {
2252                 QPRINTK(qdev, IFUP, ERR, "rx_ring alloc failed.\n");
2253                 return -ENOMEM;
2254         }
2255
2256         if (rx_ring->sbq_len) {
2257                 /*
2258                  * Allocate small buffer queue.
2259                  */
2260                 rx_ring->sbq_base =
2261                     pci_alloc_consistent(qdev->pdev, rx_ring->sbq_size,
2262                                          &rx_ring->sbq_base_dma);
2263
2264                 if (rx_ring->sbq_base == NULL) {
2265                         QPRINTK(qdev, IFUP, ERR,
2266                                 "Small buffer queue allocation failed.\n");
2267                         goto err_mem;
2268                 }
2269
2270                 /*
2271                  * Allocate small buffer queue control blocks.
2272                  */
2273                 rx_ring->sbq =
2274                     kmalloc(rx_ring->sbq_len * sizeof(struct bq_desc),
2275                             GFP_KERNEL);
2276                 if (rx_ring->sbq == NULL) {
2277                         QPRINTK(qdev, IFUP, ERR,
2278                                 "Small buffer queue control block allocation failed.\n");
2279                         goto err_mem;
2280                 }
2281
2282                 if (ql_alloc_sbq_buffers(qdev, rx_ring)) {
2283                         QPRINTK(qdev, IFUP, ERR,
2284                                 "Small buffer allocation failed.\n");
2285                         goto err_mem;
2286                 }
2287         }
2288
2289         if (rx_ring->lbq_len) {
2290                 /*
2291                  * Allocate large buffer queue.
2292                  */
2293                 rx_ring->lbq_base =
2294                     pci_alloc_consistent(qdev->pdev, rx_ring->lbq_size,
2295                                          &rx_ring->lbq_base_dma);
2296
2297                 if (rx_ring->lbq_base == NULL) {
2298                         QPRINTK(qdev, IFUP, ERR,
2299                                 "Large buffer queue allocation failed.\n");
2300                         goto err_mem;
2301                 }
2302                 /*
2303                  * Allocate large buffer queue control blocks.
2304                  */
2305                 rx_ring->lbq =
2306                     kmalloc(rx_ring->lbq_len * sizeof(struct bq_desc),
2307                             GFP_KERNEL);
2308                 if (rx_ring->lbq == NULL) {
2309                         QPRINTK(qdev, IFUP, ERR,
2310                                 "Large buffer queue control block allocation failed.\n");
2311                         goto err_mem;
2312                 }
2313
2314                 /*
2315                  * Allocate the buffers.
2316                  */
2317                 if (ql_alloc_lbq_buffers(qdev, rx_ring)) {
2318                         QPRINTK(qdev, IFUP, ERR,
2319                                 "Large buffer allocation failed.\n");
2320                         goto err_mem;
2321                 }
2322         }
2323
2324         return 0;
2325
2326 err_mem:
2327         ql_free_rx_resources(qdev, rx_ring);
2328         return -ENOMEM;
2329 }
2330
2331 static void ql_tx_ring_clean(struct ql_adapter *qdev)
2332 {
2333         struct tx_ring *tx_ring;
2334         struct tx_ring_desc *tx_ring_desc;
2335         int i, j;
2336
2337         /*
2338          * Loop through all queues and free
2339          * any resources.
2340          */
2341         for (j = 0; j < qdev->tx_ring_count; j++) {
2342                 tx_ring = &qdev->tx_ring[j];
2343                 for (i = 0; i < tx_ring->wq_len; i++) {
2344                         tx_ring_desc = &tx_ring->q[i];
2345                         if (tx_ring_desc && tx_ring_desc->skb) {
2346                                 QPRINTK(qdev, IFDOWN, ERR,
2347                                 "Freeing lost SKB %p, from queue %d, index %d.\n",
2348                                         tx_ring_desc->skb, j,
2349                                         tx_ring_desc->index);
2350                                 ql_unmap_send(qdev, tx_ring_desc,
2351                                               tx_ring_desc->map_cnt);
2352                                 dev_kfree_skb(tx_ring_desc->skb);
2353                                 tx_ring_desc->skb = NULL;
2354                         }
2355                 }
2356         }
2357 }
2358
2359 static void ql_free_ring_cb(struct ql_adapter *qdev)
2360 {
2361         kfree(qdev->ring_mem);
2362 }
2363
2364 static int ql_alloc_ring_cb(struct ql_adapter *qdev)
2365 {
2366         /* Allocate space for tx/rx ring control blocks. */
2367         qdev->ring_mem_size =
2368             (qdev->tx_ring_count * sizeof(struct tx_ring)) +
2369             (qdev->rx_ring_count * sizeof(struct rx_ring));
2370         qdev->ring_mem = kmalloc(qdev->ring_mem_size, GFP_KERNEL);
2371         if (qdev->ring_mem == NULL) {
2372                 return -ENOMEM;
2373         } else {
2374                 qdev->rx_ring = qdev->ring_mem;
2375                 qdev->tx_ring = qdev->ring_mem +
2376                     (qdev->rx_ring_count * sizeof(struct rx_ring));
2377         }
2378         return 0;
2379 }
2380
2381 static void ql_free_mem_resources(struct ql_adapter *qdev)
2382 {
2383         int i;
2384
2385         for (i = 0; i < qdev->tx_ring_count; i++)
2386                 ql_free_tx_resources(qdev, &qdev->tx_ring[i]);
2387         for (i = 0; i < qdev->rx_ring_count; i++)
2388                 ql_free_rx_resources(qdev, &qdev->rx_ring[i]);
2389         ql_free_shadow_space(qdev);
2390 }
2391
2392 static int ql_alloc_mem_resources(struct ql_adapter *qdev)
2393 {
2394         int i;
2395
2396         /* Allocate space for our shadow registers and such. */
2397         if (ql_alloc_shadow_space(qdev))
2398                 return -ENOMEM;
2399
2400         for (i = 0; i < qdev->rx_ring_count; i++) {
2401                 if (ql_alloc_rx_resources(qdev, &qdev->rx_ring[i]) != 0) {
2402                         QPRINTK(qdev, IFUP, ERR,
2403                                 "RX resource allocation failed.\n");
2404                         goto err_mem;
2405                 }
2406         }
2407         /* Allocate tx queue resources */
2408         for (i = 0; i < qdev->tx_ring_count; i++) {
2409                 if (ql_alloc_tx_resources(qdev, &qdev->tx_ring[i]) != 0) {
2410                         QPRINTK(qdev, IFUP, ERR,
2411                                 "TX resource allocation failed.\n");
2412                         goto err_mem;
2413                 }
2414         }
2415         return 0;
2416
2417 err_mem:
2418         ql_free_mem_resources(qdev);
2419         return -ENOMEM;
2420 }
2421
2422 /* Set up the rx ring control block and pass it to the chip.
2423  * The control block is defined as
2424  * "Completion Queue Initialization Control Block", or cqicb.
2425  */
2426 static int ql_start_rx_ring(struct ql_adapter *qdev, struct rx_ring *rx_ring)
2427 {
2428         struct cqicb *cqicb = &rx_ring->cqicb;
2429         void *shadow_reg = qdev->rx_ring_shadow_reg_area +
2430             (rx_ring->cq_id * sizeof(u64) * 4);
2431         u64 shadow_reg_dma = qdev->rx_ring_shadow_reg_dma +
2432             (rx_ring->cq_id * sizeof(u64) * 4);
2433         void __iomem *doorbell_area =
2434             qdev->doorbell_area + (DB_PAGE_SIZE * (128 + rx_ring->cq_id));
2435         int err = 0;
2436         u16 bq_len;
2437
2438         /* Set up the shadow registers for this ring. */
2439         rx_ring->prod_idx_sh_reg = shadow_reg;
2440         rx_ring->prod_idx_sh_reg_dma = shadow_reg_dma;
2441         shadow_reg += sizeof(u64);
2442         shadow_reg_dma += sizeof(u64);
2443         rx_ring->lbq_base_indirect = shadow_reg;
2444         rx_ring->lbq_base_indirect_dma = shadow_reg_dma;
2445         shadow_reg += sizeof(u64);
2446         shadow_reg_dma += sizeof(u64);
2447         rx_ring->sbq_base_indirect = shadow_reg;
2448         rx_ring->sbq_base_indirect_dma = shadow_reg_dma;
2449
2450         /* PCI doorbell mem area + 0x00 for consumer index register */
2451         rx_ring->cnsmr_idx_db_reg = (u32 __iomem *) doorbell_area;
2452         rx_ring->cnsmr_idx = 0;
2453         rx_ring->curr_entry = rx_ring->cq_base;
2454
2455         /* PCI doorbell mem area + 0x04 for valid register */
2456         rx_ring->valid_db_reg = doorbell_area + 0x04;
2457
2458         /* PCI doorbell mem area + 0x18 for large buffer consumer */
2459         rx_ring->lbq_prod_idx_db_reg = (u32 __iomem *) (doorbell_area + 0x18);
2460
2461         /* PCI doorbell mem area + 0x1c */
2462         rx_ring->sbq_prod_idx_db_reg = (u32 __iomem *) (doorbell_area + 0x1c);
2463
2464         memset((void *)cqicb, 0, sizeof(struct cqicb));
2465         cqicb->msix_vect = rx_ring->irq;
2466
2467         bq_len = (rx_ring->cq_len == 65536) ? 0 : (u16) rx_ring->cq_len;
2468         cqicb->len = cpu_to_le16(bq_len | LEN_V | LEN_CPP_CONT);
2469
2470         cqicb->addr_lo = cpu_to_le32(rx_ring->cq_base_dma);
2471         cqicb->addr_hi = cpu_to_le32((u64) rx_ring->cq_base_dma >> 32);
2472
2473         cqicb->prod_idx_addr_lo = cpu_to_le32(rx_ring->prod_idx_sh_reg_dma);
2474         cqicb->prod_idx_addr_hi =
2475             cpu_to_le32((u64) rx_ring->prod_idx_sh_reg_dma >> 32);
2476
2477         /*
2478          * Set up the control block load flags.
2479          */
2480         cqicb->flags = FLAGS_LC |       /* Load queue base address */
2481             FLAGS_LV |          /* Load MSI-X vector */
2482             FLAGS_LI;           /* Load irq delay values */
2483         if (rx_ring->lbq_len) {
2484                 cqicb->flags |= FLAGS_LL;       /* Load lbq values */
2485                 *((u64 *) rx_ring->lbq_base_indirect) = rx_ring->lbq_base_dma;
2486                 cqicb->lbq_addr_lo =
2487                     cpu_to_le32(rx_ring->lbq_base_indirect_dma);
2488                 cqicb->lbq_addr_hi =
2489                     cpu_to_le32((u64) rx_ring->lbq_base_indirect_dma >> 32);
2490                 bq_len = (rx_ring->lbq_buf_size == 65536) ? 0 :
2491                         (u16) rx_ring->lbq_buf_size;
2492                 cqicb->lbq_buf_size = cpu_to_le16(bq_len);
2493                 bq_len = (rx_ring->lbq_len == 65536) ? 0 :
2494                         (u16) rx_ring->lbq_len;
2495                 cqicb->lbq_len = cpu_to_le16(bq_len);
2496                 rx_ring->lbq_prod_idx = rx_ring->lbq_len - 16;
2497                 rx_ring->lbq_curr_idx = 0;
2498                 rx_ring->lbq_clean_idx = rx_ring->lbq_prod_idx;
2499                 rx_ring->lbq_free_cnt = 16;
2500         }
2501         if (rx_ring->sbq_len) {
2502                 cqicb->flags |= FLAGS_LS;       /* Load sbq values */
2503                 *((u64 *) rx_ring->sbq_base_indirect) = rx_ring->sbq_base_dma;
2504                 cqicb->sbq_addr_lo =
2505                     cpu_to_le32(rx_ring->sbq_base_indirect_dma);
2506                 cqicb->sbq_addr_hi =
2507                     cpu_to_le32((u64) rx_ring->sbq_base_indirect_dma >> 32);
2508                 cqicb->sbq_buf_size =
2509                     cpu_to_le16(((rx_ring->sbq_buf_size / 2) + 8) & 0xfffffff8);
2510                 bq_len = (rx_ring->sbq_len == 65536) ? 0 :
2511                         (u16) rx_ring->sbq_len;
2512                 cqicb->sbq_len = cpu_to_le16(bq_len);
2513                 rx_ring->sbq_prod_idx = rx_ring->sbq_len - 16;
2514                 rx_ring->sbq_curr_idx = 0;
2515                 rx_ring->sbq_clean_idx = rx_ring->sbq_prod_idx;
2516                 rx_ring->sbq_free_cnt = 16;
2517         }
2518         switch (rx_ring->type) {
2519         case TX_Q:
2520                 /* If there's only one interrupt, then we use
2521                  * worker threads to process the outbound
2522                  * completion handling rx_rings. We do this so
2523                  * they can be run on multiple CPUs. There is
2524                  * room to play with this more where we would only
2525                  * run in a worker if there are more than x number
2526                  * of outbound completions on the queue and more
2527                  * than one queue active.  Some threshold that
2528                  * would indicate a benefit in spite of the cost
2529                  * of a context switch.
2530                  * If there's more than one interrupt, then the
2531                  * outbound completions are processed in the ISR.
2532                  */
2533                 if (!test_bit(QL_MSIX_ENABLED, &qdev->flags))
2534                         INIT_DELAYED_WORK(&rx_ring->rx_work, ql_tx_clean);
2535                 else {
2536                         /* With all debug warnings on we see a WARN_ON message
2537                          * when we free the skb in the interrupt context.
2538                          */
2539                         INIT_DELAYED_WORK(&rx_ring->rx_work, ql_tx_clean);
2540                 }
2541                 cqicb->irq_delay = cpu_to_le16(qdev->tx_coalesce_usecs);
2542                 cqicb->pkt_delay = cpu_to_le16(qdev->tx_max_coalesced_frames);
2543                 break;
2544         case DEFAULT_Q:
2545                 INIT_DELAYED_WORK(&rx_ring->rx_work, ql_rx_clean);
2546                 cqicb->irq_delay = 0;
2547                 cqicb->pkt_delay = 0;
2548                 break;
2549         case RX_Q:
2550                 /* Inbound completion handling rx_rings run in
2551                  * separate NAPI contexts.
2552                  */
2553                 netif_napi_add(qdev->ndev, &rx_ring->napi, ql_napi_poll_msix,
2554                                64);
2555                 cqicb->irq_delay = cpu_to_le16(qdev->rx_coalesce_usecs);
2556                 cqicb->pkt_delay = cpu_to_le16(qdev->rx_max_coalesced_frames);
2557                 break;
2558         default:
2559                 QPRINTK(qdev, IFUP, DEBUG, "Invalid rx_ring->type = %d.\n",
2560                         rx_ring->type);
2561         }
2562         QPRINTK(qdev, IFUP, INFO, "Initializing rx work queue.\n");
2563         err = ql_write_cfg(qdev, cqicb, sizeof(struct cqicb),
2564                            CFG_LCQ, rx_ring->cq_id);
2565         if (err) {
2566                 QPRINTK(qdev, IFUP, ERR, "Failed to load CQICB.\n");
2567                 return err;
2568         }
2569         QPRINTK(qdev, IFUP, INFO, "Successfully loaded CQICB.\n");
2570         /*
2571          * Advance the producer index for the buffer queues.
2572          */
2573         wmb();
2574         if (rx_ring->lbq_len)
2575                 ql_write_db_reg(rx_ring->lbq_prod_idx,
2576                                 rx_ring->lbq_prod_idx_db_reg);
2577         if (rx_ring->sbq_len)
2578                 ql_write_db_reg(rx_ring->sbq_prod_idx,
2579                                 rx_ring->sbq_prod_idx_db_reg);
2580         return err;
2581 }
2582
2583 static int ql_start_tx_ring(struct ql_adapter *qdev, struct tx_ring *tx_ring)
2584 {
2585         struct wqicb *wqicb = (struct wqicb *)tx_ring;
2586         void __iomem *doorbell_area =
2587             qdev->doorbell_area + (DB_PAGE_SIZE * tx_ring->wq_id);
2588         void *shadow_reg = qdev->tx_ring_shadow_reg_area +
2589             (tx_ring->wq_id * sizeof(u64));
2590         u64 shadow_reg_dma = qdev->tx_ring_shadow_reg_dma +
2591             (tx_ring->wq_id * sizeof(u64));
2592         int err = 0;
2593
2594         /*
2595          * Assign doorbell registers for this tx_ring.
2596          */
2597         /* TX PCI doorbell mem area for tx producer index */
2598         tx_ring->prod_idx_db_reg = (u32 __iomem *) doorbell_area;
2599         tx_ring->prod_idx = 0;
2600         /* TX PCI doorbell mem area + 0x04 */
2601         tx_ring->valid_db_reg = doorbell_area + 0x04;
2602
2603         /*
2604          * Assign shadow registers for this tx_ring.
2605          */
2606         tx_ring->cnsmr_idx_sh_reg = shadow_reg;
2607         tx_ring->cnsmr_idx_sh_reg_dma = shadow_reg_dma;
2608
2609         wqicb->len = cpu_to_le16(tx_ring->wq_len | Q_LEN_V | Q_LEN_CPP_CONT);
2610         wqicb->flags = cpu_to_le16(Q_FLAGS_LC |
2611                                    Q_FLAGS_LB | Q_FLAGS_LI | Q_FLAGS_LO);
2612         wqicb->cq_id_rss = cpu_to_le16(tx_ring->cq_id);
2613         wqicb->rid = 0;
2614         wqicb->addr_lo = cpu_to_le32(tx_ring->wq_base_dma);
2615         wqicb->addr_hi = cpu_to_le32((u64) tx_ring->wq_base_dma >> 32);
2616
2617         wqicb->cnsmr_idx_addr_lo = cpu_to_le32(tx_ring->cnsmr_idx_sh_reg_dma);
2618         wqicb->cnsmr_idx_addr_hi =
2619             cpu_to_le32((u64) tx_ring->cnsmr_idx_sh_reg_dma >> 32);
2620
2621         ql_init_tx_ring(qdev, tx_ring);
2622
2623         err = ql_write_cfg(qdev, wqicb, sizeof(wqicb), CFG_LRQ,
2624                            (u16) tx_ring->wq_id);
2625         if (err) {
2626                 QPRINTK(qdev, IFUP, ERR, "Failed to load tx_ring.\n");
2627                 return err;
2628         }
2629         QPRINTK(qdev, IFUP, INFO, "Successfully loaded WQICB.\n");
2630         return err;
2631 }
2632
2633 static void ql_disable_msix(struct ql_adapter *qdev)
2634 {
2635         if (test_bit(QL_MSIX_ENABLED, &qdev->flags)) {
2636                 pci_disable_msix(qdev->pdev);
2637                 clear_bit(QL_MSIX_ENABLED, &qdev->flags);
2638                 kfree(qdev->msi_x_entry);
2639                 qdev->msi_x_entry = NULL;
2640         } else if (test_bit(QL_MSI_ENABLED, &qdev->flags)) {
2641                 pci_disable_msi(qdev->pdev);
2642                 clear_bit(QL_MSI_ENABLED, &qdev->flags);
2643         }
2644 }
2645
2646 static void ql_enable_msix(struct ql_adapter *qdev)
2647 {
2648         int i;
2649
2650         qdev->intr_count = 1;
2651         /* Get the MSIX vectors. */
2652         if (irq_type == MSIX_IRQ) {
2653                 /* Try to alloc space for the msix struct,
2654                  * if it fails then go to MSI/legacy.
2655                  */
2656                 qdev->msi_x_entry = kcalloc(qdev->rx_ring_count,
2657                                             sizeof(struct msix_entry),
2658                                             GFP_KERNEL);
2659                 if (!qdev->msi_x_entry) {
2660                         irq_type = MSI_IRQ;
2661                         goto msi;
2662                 }
2663
2664                 for (i = 0; i < qdev->rx_ring_count; i++)
2665                         qdev->msi_x_entry[i].entry = i;
2666
2667                 if (!pci_enable_msix
2668                     (qdev->pdev, qdev->msi_x_entry, qdev->rx_ring_count)) {
2669                         set_bit(QL_MSIX_ENABLED, &qdev->flags);
2670                         qdev->intr_count = qdev->rx_ring_count;
2671                         QPRINTK(qdev, IFUP, INFO,
2672                                 "MSI-X Enabled, got %d vectors.\n",
2673                                 qdev->intr_count);
2674                         return;
2675                 } else {
2676                         kfree(qdev->msi_x_entry);
2677                         qdev->msi_x_entry = NULL;
2678                         QPRINTK(qdev, IFUP, WARNING,
2679                                 "MSI-X Enable failed, trying MSI.\n");
2680                         irq_type = MSI_IRQ;
2681                 }
2682         }
2683 msi:
2684         if (irq_type == MSI_IRQ) {
2685                 if (!pci_enable_msi(qdev->pdev)) {
2686                         set_bit(QL_MSI_ENABLED, &qdev->flags);
2687                         QPRINTK(qdev, IFUP, INFO,
2688                                 "Running with MSI interrupts.\n");
2689                         return;
2690                 }
2691         }
2692         irq_type = LEG_IRQ;
2693         QPRINTK(qdev, IFUP, DEBUG, "Running with legacy interrupts.\n");
2694 }
2695
2696 /*
2697  * Here we build the intr_context structures based on
2698  * our rx_ring count and intr vector count.
2699  * The intr_context structure is used to hook each vector
2700  * to possibly different handlers.
2701  */
2702 static void ql_resolve_queues_to_irqs(struct ql_adapter *qdev)
2703 {
2704         int i = 0;
2705         struct intr_context *intr_context = &qdev->intr_context[0];
2706
2707         ql_enable_msix(qdev);
2708
2709         if (likely(test_bit(QL_MSIX_ENABLED, &qdev->flags))) {
2710                 /* Each rx_ring has it's
2711                  * own intr_context since we have separate
2712                  * vectors for each queue.
2713                  * This only true when MSI-X is enabled.
2714                  */
2715                 for (i = 0; i < qdev->intr_count; i++, intr_context++) {
2716                         qdev->rx_ring[i].irq = i;
2717                         intr_context->intr = i;
2718                         intr_context->qdev = qdev;
2719                         /*
2720                          * We set up each vectors enable/disable/read bits so
2721                          * there's no bit/mask calculations in the critical path.
2722                          */
2723                         intr_context->intr_en_mask =
2724                             INTR_EN_TYPE_MASK | INTR_EN_INTR_MASK |
2725                             INTR_EN_TYPE_ENABLE | INTR_EN_IHD_MASK | INTR_EN_IHD
2726                             | i;
2727                         intr_context->intr_dis_mask =
2728                             INTR_EN_TYPE_MASK | INTR_EN_INTR_MASK |
2729                             INTR_EN_TYPE_DISABLE | INTR_EN_IHD_MASK |
2730                             INTR_EN_IHD | i;
2731                         intr_context->intr_read_mask =
2732                             INTR_EN_TYPE_MASK | INTR_EN_INTR_MASK |
2733                             INTR_EN_TYPE_READ | INTR_EN_IHD_MASK | INTR_EN_IHD |
2734                             i;
2735
2736                         if (i == 0) {
2737                                 /*
2738                                  * Default queue handles bcast/mcast plus
2739                                  * async events.  Needs buffers.
2740                                  */
2741                                 intr_context->handler = qlge_isr;
2742                                 sprintf(intr_context->name, "%s-default-queue",
2743                                         qdev->ndev->name);
2744                         } else if (i < qdev->rss_ring_first_cq_id) {
2745                                 /*
2746                                  * Outbound queue is for outbound completions only.
2747                                  */
2748                                 intr_context->handler = qlge_msix_tx_isr;
2749                                 sprintf(intr_context->name, "%s-txq-%d",
2750                                         qdev->ndev->name, i);
2751                         } else {
2752                                 /*
2753                                  * Inbound queues handle unicast frames only.
2754                                  */
2755                                 intr_context->handler = qlge_msix_rx_isr;
2756                                 sprintf(intr_context->name, "%s-rxq-%d",
2757                                         qdev->ndev->name, i);
2758                         }
2759                 }
2760         } else {
2761                 /*
2762                  * All rx_rings use the same intr_context since
2763                  * there is only one vector.
2764                  */
2765                 intr_context->intr = 0;
2766                 intr_context->qdev = qdev;
2767                 /*
2768                  * We set up each vectors enable/disable/read bits so
2769                  * there's no bit/mask calculations in the critical path.
2770                  */
2771                 intr_context->intr_en_mask =
2772                     INTR_EN_TYPE_MASK | INTR_EN_INTR_MASK | INTR_EN_TYPE_ENABLE;
2773                 intr_context->intr_dis_mask =
2774                     INTR_EN_TYPE_MASK | INTR_EN_INTR_MASK |
2775                     INTR_EN_TYPE_DISABLE;
2776                 intr_context->intr_read_mask =
2777                     INTR_EN_TYPE_MASK | INTR_EN_INTR_MASK | INTR_EN_TYPE_READ;
2778                 /*
2779                  * Single interrupt means one handler for all rings.
2780                  */
2781                 intr_context->handler = qlge_isr;
2782                 sprintf(intr_context->name, "%s-single_irq", qdev->ndev->name);
2783                 for (i = 0; i < qdev->rx_ring_count; i++)
2784                         qdev->rx_ring[i].irq = 0;
2785         }
2786 }
2787
2788 static void ql_free_irq(struct ql_adapter *qdev)
2789 {
2790         int i;
2791         struct intr_context *intr_context = &qdev->intr_context[0];
2792
2793         for (i = 0; i < qdev->intr_count; i++, intr_context++) {
2794                 if (intr_context->hooked) {
2795                         if (test_bit(QL_MSIX_ENABLED, &qdev->flags)) {
2796                                 free_irq(qdev->msi_x_entry[i].vector,
2797                                          &qdev->rx_ring[i]);
2798                                 QPRINTK(qdev, IFDOWN, ERR,
2799                                         "freeing msix interrupt %d.\n", i);
2800                         } else {
2801                                 free_irq(qdev->pdev->irq, &qdev->rx_ring[0]);
2802                                 QPRINTK(qdev, IFDOWN, ERR,
2803                                         "freeing msi interrupt %d.\n", i);
2804                         }
2805                 }
2806         }
2807         ql_disable_msix(qdev);
2808 }
2809
2810 static int ql_request_irq(struct ql_adapter *qdev)
2811 {
2812         int i;
2813         int status = 0;
2814         struct pci_dev *pdev = qdev->pdev;
2815         struct intr_context *intr_context = &qdev->intr_context[0];
2816
2817         ql_resolve_queues_to_irqs(qdev);
2818
2819         for (i = 0; i < qdev->intr_count; i++, intr_context++) {
2820                 atomic_set(&intr_context->irq_cnt, 0);
2821                 if (test_bit(QL_MSIX_ENABLED, &qdev->flags)) {
2822                         status = request_irq(qdev->msi_x_entry[i].vector,
2823                                              intr_context->handler,
2824                                              0,
2825                                              intr_context->name,
2826                                              &qdev->rx_ring[i]);
2827                         if (status) {
2828                                 QPRINTK(qdev, IFUP, ERR,
2829                                         "Failed request for MSIX interrupt %d.\n",
2830                                         i);
2831                                 goto err_irq;
2832                         } else {
2833                                 QPRINTK(qdev, IFUP, INFO,
2834                                         "Hooked intr %d, queue type %s%s%s, with name %s.\n",
2835                                         i,
2836                                         qdev->rx_ring[i].type ==
2837                                         DEFAULT_Q ? "DEFAULT_Q" : "",
2838                                         qdev->rx_ring[i].type ==
2839                                         TX_Q ? "TX_Q" : "",
2840                                         qdev->rx_ring[i].type ==
2841                                         RX_Q ? "RX_Q" : "", intr_context->name);
2842                         }
2843                 } else {
2844                         QPRINTK(qdev, IFUP, DEBUG,
2845                                 "trying msi or legacy interrupts.\n");
2846                         QPRINTK(qdev, IFUP, DEBUG,
2847                                 "%s: irq = %d.\n", __func__, pdev->irq);
2848                         QPRINTK(qdev, IFUP, DEBUG,
2849                                 "%s: context->name = %s.\n", __func__,
2850                                intr_context->name);
2851                         QPRINTK(qdev, IFUP, DEBUG,
2852                                 "%s: dev_id = 0x%p.\n", __func__,
2853                                &qdev->rx_ring[0]);
2854                         status =
2855                             request_irq(pdev->irq, qlge_isr,
2856                                         test_bit(QL_MSI_ENABLED,
2857                                                  &qdev->
2858                                                  flags) ? 0 : IRQF_SHARED,
2859                                         intr_context->name, &qdev->rx_ring[0]);
2860                         if (status)
2861                                 goto err_irq;
2862
2863                         QPRINTK(qdev, IFUP, ERR,
2864                                 "Hooked intr %d, queue type %s%s%s, with name %s.\n",
2865                                 i,
2866                                 qdev->rx_ring[0].type ==
2867                                 DEFAULT_Q ? "DEFAULT_Q" : "",
2868                                 qdev->rx_ring[0].type == TX_Q ? "TX_Q" : "",
2869                                 qdev->rx_ring[0].type == RX_Q ? "RX_Q" : "",
2870                                 intr_context->name);
2871                 }
2872                 intr_context->hooked = 1;
2873         }
2874         return status;
2875 err_irq:
2876         QPRINTK(qdev, IFUP, ERR, "Failed to get the interrupts!!!/n");
2877         ql_free_irq(qdev);
2878         return status;
2879 }
2880
2881 static int ql_start_rss(struct ql_adapter *qdev)
2882 {
2883         struct ricb *ricb = &qdev->ricb;
2884         int status = 0;
2885         int i;
2886         u8 *hash_id = (u8 *) ricb->hash_cq_id;
2887
2888         memset((void *)ricb, 0, sizeof(ricb));
2889
2890         ricb->base_cq = qdev->rss_ring_first_cq_id | RSS_L4K;
2891         ricb->flags =
2892             (RSS_L6K | RSS_LI | RSS_LB | RSS_LM | RSS_RI4 | RSS_RI6 | RSS_RT4 |
2893              RSS_RT6);
2894         ricb->mask = cpu_to_le16(qdev->rss_ring_count - 1);
2895
2896         /*
2897          * Fill out the Indirection Table.
2898          */
2899         for (i = 0; i < 32; i++)
2900                 hash_id[i] = i & 1;
2901
2902         /*
2903          * Random values for the IPv6 and IPv4 Hash Keys.
2904          */
2905         get_random_bytes((void *)&ricb->ipv6_hash_key[0], 40);
2906         get_random_bytes((void *)&ricb->ipv4_hash_key[0], 16);
2907
2908         QPRINTK(qdev, IFUP, INFO, "Initializing RSS.\n");
2909
2910         status = ql_write_cfg(qdev, ricb, sizeof(ricb), CFG_LR, 0);
2911         if (status) {
2912                 QPRINTK(qdev, IFUP, ERR, "Failed to load RICB.\n");
2913                 return status;
2914         }
2915         QPRINTK(qdev, IFUP, INFO, "Successfully loaded RICB.\n");
2916         return status;
2917 }
2918
2919 /* Initialize the frame-to-queue routing. */
2920 static int ql_route_initialize(struct ql_adapter *qdev)
2921 {
2922         int status = 0;
2923         int i;
2924
2925         /* Clear all the entries in the routing table. */
2926         for (i = 0; i < 16; i++) {
2927                 status = ql_set_routing_reg(qdev, i, 0, 0);
2928                 if (status) {
2929                         QPRINTK(qdev, IFUP, ERR,
2930                                 "Failed to init routing register for CAM packets.\n");
2931                         return status;
2932                 }
2933         }
2934
2935         status = ql_set_routing_reg(qdev, RT_IDX_ALL_ERR_SLOT, RT_IDX_ERR, 1);
2936         if (status) {
2937                 QPRINTK(qdev, IFUP, ERR,
2938                         "Failed to init routing register for error packets.\n");
2939                 return status;
2940         }
2941         status = ql_set_routing_reg(qdev, RT_IDX_BCAST_SLOT, RT_IDX_BCAST, 1);
2942         if (status) {
2943                 QPRINTK(qdev, IFUP, ERR,
2944                         "Failed to init routing register for broadcast packets.\n");
2945                 return status;
2946         }
2947         /* If we have more than one inbound queue, then turn on RSS in the
2948          * routing block.
2949          */
2950         if (qdev->rss_ring_count > 1) {
2951                 status = ql_set_routing_reg(qdev, RT_IDX_RSS_MATCH_SLOT,
2952                                         RT_IDX_RSS_MATCH, 1);
2953                 if (status) {
2954                         QPRINTK(qdev, IFUP, ERR,
2955                                 "Failed to init routing register for MATCH RSS packets.\n");
2956                         return status;
2957                 }
2958         }
2959
2960         status = ql_set_routing_reg(qdev, RT_IDX_CAM_HIT_SLOT,
2961                                     RT_IDX_CAM_HIT, 1);
2962         if (status) {
2963                 QPRINTK(qdev, IFUP, ERR,
2964                         "Failed to init routing register for CAM packets.\n");
2965                 return status;
2966         }
2967         return status;
2968 }
2969
2970 static int ql_adapter_initialize(struct ql_adapter *qdev)
2971 {
2972         u32 value, mask;
2973         int i;
2974         int status = 0;
2975
2976         /*
2977          * Set up the System register to halt on errors.
2978          */
2979         value = SYS_EFE | SYS_FAE;
2980         mask = value << 16;
2981         ql_write32(qdev, SYS, mask | value);
2982
2983         /* Set the default queue. */
2984         value = NIC_RCV_CFG_DFQ;
2985         mask = NIC_RCV_CFG_DFQ_MASK;
2986         ql_write32(qdev, NIC_RCV_CFG, (mask | value));
2987
2988         /* Set the MPI interrupt to enabled. */
2989         ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16) | INTR_MASK_PI);
2990
2991         /* Enable the function, set pagesize, enable error checking. */
2992         value = FSC_FE | FSC_EPC_INBOUND | FSC_EPC_OUTBOUND |
2993             FSC_EC | FSC_VM_PAGE_4K | FSC_SH;
2994
2995         /* Set/clear header splitting. */
2996         mask = FSC_VM_PAGESIZE_MASK |
2997             FSC_DBL_MASK | FSC_DBRST_MASK | (value << 16);
2998         ql_write32(qdev, FSC, mask | value);
2999
3000         ql_write32(qdev, SPLT_HDR, SPLT_HDR_EP |
3001                 min(SMALL_BUFFER_SIZE, MAX_SPLIT_SIZE));
3002
3003         /* Start up the rx queues. */
3004         for (i = 0; i < qdev->rx_ring_count; i++) {
3005                 status = ql_start_rx_ring(qdev, &qdev->rx_ring[i]);
3006                 if (status) {
3007                         QPRINTK(qdev, IFUP, ERR,
3008                                 "Failed to start rx ring[%d].\n", i);
3009                         return status;
3010                 }
3011         }
3012
3013         /* If there is more than one inbound completion queue
3014          * then download a RICB to configure RSS.
3015          */
3016         if (qdev->rss_ring_count > 1) {
3017                 status = ql_start_rss(qdev);
3018                 if (status) {
3019                         QPRINTK(qdev, IFUP, ERR, "Failed to start RSS.\n");
3020                         return status;
3021                 }
3022         }
3023
3024         /* Start up the tx queues. */
3025         for (i = 0; i < qdev->tx_ring_count; i++) {
3026                 status = ql_start_tx_ring(qdev, &qdev->tx_ring[i]);
3027                 if (status) {
3028                         QPRINTK(qdev, IFUP, ERR,
3029                                 "Failed to start tx ring[%d].\n", i);
3030                         return status;
3031                 }
3032         }
3033
3034         status = ql_port_initialize(qdev);
3035         if (status) {
3036                 QPRINTK(qdev, IFUP, ERR, "Failed to start port.\n");
3037                 return status;
3038         }
3039
3040         status = ql_set_mac_addr_reg(qdev, (u8 *) qdev->ndev->perm_addr,
3041                                      MAC_ADDR_TYPE_CAM_MAC, qdev->func);
3042         if (status) {
3043                 QPRINTK(qdev, IFUP, ERR, "Failed to init mac address.\n");
3044                 return status;
3045         }
3046
3047         status = ql_route_initialize(qdev);
3048         if (status) {
3049                 QPRINTK(qdev, IFUP, ERR, "Failed to init routing table.\n");
3050                 return status;
3051         }
3052
3053         /* Start NAPI for the RSS queues. */
3054         for (i = qdev->rss_ring_first_cq_id; i < qdev->rx_ring_count; i++) {
3055                 QPRINTK(qdev, IFUP, INFO, "Enabling NAPI for rx_ring[%d].\n",
3056                         i);
3057                 napi_enable(&qdev->rx_ring[i].napi);
3058         }
3059
3060         return status;
3061 }
3062
3063 /* Issue soft reset to chip. */
3064 static int ql_adapter_reset(struct ql_adapter *qdev)
3065 {
3066         u32 value;
3067         int max_wait_time;
3068         int status = 0;
3069         int resetCnt = 0;
3070
3071 #define MAX_RESET_CNT   1
3072 issueReset:
3073         resetCnt++;
3074         QPRINTK(qdev, IFDOWN, DEBUG, "Issue soft reset to chip.\n");
3075         ql_write32(qdev, RST_FO, (RST_FO_FR << 16) | RST_FO_FR);
3076         /* Wait for reset to complete. */
3077         max_wait_time = 3;
3078         QPRINTK(qdev, IFDOWN, DEBUG, "Wait %d seconds for reset to complete.\n",
3079                 max_wait_time);
3080         do {
3081                 value = ql_read32(qdev, RST_FO);
3082                 if ((value & RST_FO_FR) == 0)
3083                         break;
3084
3085                 ssleep(1);
3086         } while ((--max_wait_time));
3087         if (value & RST_FO_FR) {
3088                 QPRINTK(qdev, IFDOWN, ERR,
3089                         "Stuck in SoftReset:  FSC_SR:0x%08x\n", value);
3090                 if (resetCnt < MAX_RESET_CNT)
3091                         goto issueReset;
3092         }
3093         if (max_wait_time == 0) {
3094                 status = -ETIMEDOUT;
3095                 QPRINTK(qdev, IFDOWN, ERR,
3096                         "ETIMEOUT!!! errored out of resetting the chip!\n");
3097         }
3098
3099         return status;
3100 }
3101
3102 static void ql_display_dev_info(struct net_device *ndev)
3103 {
3104         struct ql_adapter *qdev = (struct ql_adapter *)netdev_priv(ndev);
3105
3106         QPRINTK(qdev, PROBE, INFO,
3107                 "Function #%d, NIC Roll %d, NIC Rev = %d, "
3108                 "XG Roll = %d, XG Rev = %d.\n",
3109                 qdev->func,
3110                 qdev->chip_rev_id & 0x0000000f,
3111                 qdev->chip_rev_id >> 4 & 0x0000000f,
3112                 qdev->chip_rev_id >> 8 & 0x0000000f,
3113                 qdev->chip_rev_id >> 12 & 0x0000000f);
3114         QPRINTK(qdev, PROBE, INFO, "MAC address %pM\n", ndev->dev_addr);
3115 }
3116
3117 static int ql_adapter_down(struct ql_adapter *qdev)
3118 {
3119         struct net_device *ndev = qdev->ndev;
3120         int i, status = 0;
3121         struct rx_ring *rx_ring;
3122
3123         netif_stop_queue(ndev);
3124         netif_carrier_off(ndev);
3125
3126         cancel_delayed_work_sync(&qdev->asic_reset_work);
3127         cancel_delayed_work_sync(&qdev->mpi_reset_work);
3128         cancel_delayed_work_sync(&qdev->mpi_work);
3129
3130         /* The default queue at index 0 is always processed in
3131          * a workqueue.
3132          */
3133         cancel_delayed_work_sync(&qdev->rx_ring[0].rx_work);
3134
3135         /* The rest of the rx_rings are processed in
3136          * a workqueue only if it's a single interrupt
3137          * environment (MSI/Legacy).
3138          */
3139         for (i = 1; i < qdev->rx_ring_count; i++) {
3140                 rx_ring = &qdev->rx_ring[i];
3141                 /* Only the RSS rings use NAPI on multi irq
3142                  * environment.  Outbound completion processing
3143                  * is done in interrupt context.
3144                  */
3145                 if (i >= qdev->rss_ring_first_cq_id) {
3146                         napi_disable(&rx_ring->napi);
3147                 } else {
3148                         cancel_delayed_work_sync(&rx_ring->rx_work);
3149                 }
3150         }
3151
3152         clear_bit(QL_ADAPTER_UP, &qdev->flags);
3153
3154         ql_disable_interrupts(qdev);
3155
3156         ql_tx_ring_clean(qdev);
3157
3158         spin_lock(&qdev->hw_lock);
3159         status = ql_adapter_reset(qdev);
3160         if (status)
3161                 QPRINTK(qdev, IFDOWN, ERR, "reset(func #%d) FAILED!\n",
3162                         qdev->func);
3163         spin_unlock(&qdev->hw_lock);
3164         return status;
3165 }
3166
3167 static int ql_adapter_up(struct ql_adapter *qdev)
3168 {
3169         int err = 0;
3170
3171         spin_lock(&qdev->hw_lock);
3172         err = ql_adapter_initialize(qdev);
3173         if (err) {
3174                 QPRINTK(qdev, IFUP, INFO, "Unable to initialize adapter.\n");
3175                 spin_unlock(&qdev->hw_lock);
3176                 goto err_init;
3177         }
3178         spin_unlock(&qdev->hw_lock);
3179         set_bit(QL_ADAPTER_UP, &qdev->flags);
3180         ql_enable_interrupts(qdev);
3181         ql_enable_all_completion_interrupts(qdev);
3182         if ((ql_read32(qdev, STS) & qdev->port_init)) {
3183                 netif_carrier_on(qdev->ndev);
3184                 netif_start_queue(qdev->ndev);
3185         }
3186
3187         return 0;
3188 err_init:
3189         ql_adapter_reset(qdev);
3190         return err;
3191 }
3192
3193 static int ql_cycle_adapter(struct ql_adapter *qdev)
3194 {
3195         int status;
3196
3197         status = ql_adapter_down(qdev);
3198         if (status)
3199                 goto error;
3200
3201         status = ql_adapter_up(qdev);
3202         if (status)
3203                 goto error;
3204
3205         return status;
3206 error:
3207         QPRINTK(qdev, IFUP, ALERT,
3208                 "Driver up/down cycle failed, closing device\n");
3209         rtnl_lock();
3210         dev_close(qdev->ndev);
3211         rtnl_unlock();
3212         return status;
3213 }
3214
3215 static void ql_release_adapter_resources(struct ql_adapter *qdev)
3216 {
3217         ql_free_mem_resources(qdev);
3218         ql_free_irq(qdev);
3219 }
3220
3221 static int ql_get_adapter_resources(struct ql_adapter *qdev)
3222 {
3223         int status = 0;
3224
3225         if (ql_alloc_mem_resources(qdev)) {
3226                 QPRINTK(qdev, IFUP, ERR, "Unable to  allocate memory.\n");
3227                 return -ENOMEM;
3228         }
3229         status = ql_request_irq(qdev);
3230         if (status)
3231                 goto err_irq;
3232         return status;
3233 err_irq:
3234         ql_free_mem_resources(qdev);
3235         return status;
3236 }
3237
3238 static int qlge_close(struct net_device *ndev)
3239 {
3240         struct ql_adapter *qdev = netdev_priv(ndev);
3241
3242         /*
3243          * Wait for device to recover from a reset.
3244          * (Rarely happens, but possible.)
3245          */
3246         while (!test_bit(QL_ADAPTER_UP, &qdev->flags))
3247                 msleep(1);
3248         ql_adapter_down(qdev);
3249         ql_release_adapter_resources(qdev);
3250         ql_free_ring_cb(qdev);
3251         return 0;
3252 }
3253
3254 static int ql_configure_rings(struct ql_adapter *qdev)
3255 {
3256         int i;
3257         struct rx_ring *rx_ring;
3258         struct tx_ring *tx_ring;
3259         int cpu_cnt = num_online_cpus();
3260
3261         /*
3262          * For each processor present we allocate one
3263          * rx_ring for outbound completions, and one
3264          * rx_ring for inbound completions.  Plus there is
3265          * always the one default queue.  For the CPU
3266          * counts we end up with the following rx_rings:
3267          * rx_ring count =
3268          *  one default queue +
3269          *  (CPU count * outbound completion rx_ring) +
3270          *  (CPU count * inbound (RSS) completion rx_ring)
3271          * To keep it simple we limit the total number of
3272          * queues to < 32, so we truncate CPU to 8.
3273          * This limitation can be removed when requested.
3274          */
3275
3276         if (cpu_cnt > 8)
3277                 cpu_cnt = 8;
3278
3279         /*
3280          * rx_ring[0] is always the default queue.
3281          */
3282         /* Allocate outbound completion ring for each CPU. */
3283         qdev->tx_ring_count = cpu_cnt;
3284         /* Allocate inbound completion (RSS) ring for each CPU. */
3285         qdev->rss_ring_count = cpu_cnt;
3286         /* cq_id for the first inbound ring handler. */
3287         qdev->rss_ring_first_cq_id = cpu_cnt + 1;
3288         /*
3289          * qdev->rx_ring_count:
3290          * Total number of rx_rings.  This includes the one
3291          * default queue, a number of outbound completion
3292          * handler rx_rings, and the number of inbound
3293          * completion handler rx_rings.
3294          */
3295         qdev->rx_ring_count = qdev->tx_ring_count + qdev->rss_ring_count + 1;
3296
3297         if (ql_alloc_ring_cb(qdev))
3298                 return -ENOMEM;
3299
3300         for (i = 0; i < qdev->tx_ring_count; i++) {
3301                 tx_ring = &qdev->tx_ring[i];
3302                 memset((void *)tx_ring, 0, sizeof(tx_ring));
3303                 tx_ring->qdev = qdev;
3304                 tx_ring->wq_id = i;
3305                 tx_ring->wq_len = qdev->tx_ring_size;
3306                 tx_ring->wq_size =
3307                     tx_ring->wq_len * sizeof(struct ob_mac_iocb_req);
3308
3309                 /*
3310                  * The completion queue ID for the tx rings start
3311                  * immediately after the default Q ID, which is zero.
3312                  */
3313                 tx_ring->cq_id = i + 1;
3314         }
3315
3316         for (i = 0; i < qdev->rx_ring_count; i++) {
3317                 rx_ring = &qdev->rx_ring[i];
3318                 memset((void *)rx_ring, 0, sizeof(rx_ring));
3319                 rx_ring->qdev = qdev;
3320                 rx_ring->cq_id = i;
3321                 rx_ring->cpu = i % cpu_cnt;     /* CPU to run handler on. */
3322                 if (i == 0) {   /* Default queue at index 0. */
3323                         /*
3324                          * Default queue handles bcast/mcast plus
3325                          * async events.  Needs buffers.
3326                          */
3327                         rx_ring->cq_len = qdev->rx_ring_size;
3328                         rx_ring->cq_size =
3329                             rx_ring->cq_len * sizeof(struct ql_net_rsp_iocb);
3330                         rx_ring->lbq_len = NUM_LARGE_BUFFERS;
3331                         rx_ring->lbq_size =
3332                             rx_ring->lbq_len * sizeof(__le64);
3333                         rx_ring->lbq_buf_size = LARGE_BUFFER_SIZE;
3334                         rx_ring->sbq_len = NUM_SMALL_BUFFERS;
3335                         rx_ring->sbq_size =
3336                             rx_ring->sbq_len * sizeof(__le64);
3337                         rx_ring->sbq_buf_size = SMALL_BUFFER_SIZE * 2;
3338                         rx_ring->type = DEFAULT_Q;
3339                 } else if (i < qdev->rss_ring_first_cq_id) {
3340                         /*
3341                          * Outbound queue handles outbound completions only.
3342                          */
3343                         /* outbound cq is same size as tx_ring it services. */
3344                         rx_ring->cq_len = qdev->tx_ring_size;
3345                         rx_ring->cq_size =
3346                             rx_ring->cq_len * sizeof(struct ql_net_rsp_iocb);
3347                         rx_ring->lbq_len = 0;
3348                         rx_ring->lbq_size = 0;
3349                         rx_ring->lbq_buf_size = 0;
3350                         rx_ring->sbq_len = 0;
3351                         rx_ring->sbq_size = 0;
3352                         rx_ring->sbq_buf_size = 0;
3353                         rx_ring->type = TX_Q;
3354                 } else {        /* Inbound completions (RSS) queues */
3355                         /*
3356                          * Inbound queues handle unicast frames only.
3357                          */
3358                         rx_ring->cq_len = qdev->rx_ring_size;
3359                         rx_ring->cq_size =
3360                             rx_ring->cq_len * sizeof(struct ql_net_rsp_iocb);
3361                         rx_ring->lbq_len = NUM_LARGE_BUFFERS;
3362                         rx_ring->lbq_size =
3363                             rx_ring->lbq_len * sizeof(__le64);
3364                         rx_ring->lbq_buf_size = LARGE_BUFFER_SIZE;
3365                         rx_ring->sbq_len = NUM_SMALL_BUFFERS;
3366                         rx_ring->sbq_size =
3367                             rx_ring->sbq_len * sizeof(__le64);
3368                         rx_ring->sbq_buf_size = SMALL_BUFFER_SIZE * 2;
3369                         rx_ring->type = RX_Q;
3370                 }
3371         }
3372         return 0;
3373 }
3374
3375 static int qlge_open(struct net_device *ndev)
3376 {
3377         int err = 0;
3378         struct ql_adapter *qdev = netdev_priv(ndev);
3379
3380         err = ql_configure_rings(qdev);
3381         if (err)
3382                 return err;
3383
3384         err = ql_get_adapter_resources(qdev);
3385         if (err)
3386                 goto error_up;
3387
3388         err = ql_adapter_up(qdev);
3389         if (err)
3390                 goto error_up;
3391
3392         return err;
3393
3394 error_up:
3395         ql_release_adapter_resources(qdev);
3396         ql_free_ring_cb(qdev);
3397         return err;
3398 }
3399
3400 static int qlge_change_mtu(struct net_device *ndev, int new_mtu)
3401 {
3402         struct ql_adapter *qdev = netdev_priv(ndev);
3403
3404         if (ndev->mtu == 1500 && new_mtu == 9000) {
3405                 QPRINTK(qdev, IFUP, ERR, "Changing to jumbo MTU.\n");
3406         } else if (ndev->mtu == 9000 && new_mtu == 1500) {
3407                 QPRINTK(qdev, IFUP, ERR, "Changing to normal MTU.\n");
3408         } else if ((ndev->mtu == 1500 && new_mtu == 1500) ||
3409                    (ndev->mtu == 9000 && new_mtu == 9000)) {
3410                 return 0;
3411         } else
3412                 return -EINVAL;
3413         ndev->mtu = new_mtu;
3414         return 0;
3415 }
3416
3417 static struct net_device_stats *qlge_get_stats(struct net_device
3418                                                *ndev)
3419 {
3420         struct ql_adapter *qdev = netdev_priv(ndev);
3421         return &qdev->stats;
3422 }
3423
3424 static void qlge_set_multicast_list(struct net_device *ndev)
3425 {
3426         struct ql_adapter *qdev = (struct ql_adapter *)netdev_priv(ndev);
3427         struct dev_mc_list *mc_ptr;
3428         int i;
3429
3430         spin_lock(&qdev->hw_lock);
3431         /*
3432          * Set or clear promiscuous mode if a
3433          * transition is taking place.
3434          */
3435         if (ndev->flags & IFF_PROMISC) {
3436                 if (!test_bit(QL_PROMISCUOUS, &qdev->flags)) {
3437                         if (ql_set_routing_reg
3438                             (qdev, RT_IDX_PROMISCUOUS_SLOT, RT_IDX_VALID, 1)) {
3439                                 QPRINTK(qdev, HW, ERR,
3440                                         "Failed to set promiscous mode.\n");
3441                         } else {
3442                                 set_bit(QL_PROMISCUOUS, &qdev->flags);
3443                         }
3444                 }
3445         } else {
3446                 if (test_bit(QL_PROMISCUOUS, &qdev->flags)) {
3447                         if (ql_set_routing_reg
3448                             (qdev, RT_IDX_PROMISCUOUS_SLOT, RT_IDX_VALID, 0)) {
3449                                 QPRINTK(qdev, HW, ERR,
3450                                         "Failed to clear promiscous mode.\n");
3451                         } else {
3452                                 clear_bit(QL_PROMISCUOUS, &qdev->flags);
3453                         }
3454                 }
3455         }
3456
3457         /*
3458          * Set or clear all multicast mode if a
3459          * transition is taking place.
3460          */
3461         if ((ndev->flags & IFF_ALLMULTI) ||
3462             (ndev->mc_count > MAX_MULTICAST_ENTRIES)) {
3463                 if (!test_bit(QL_ALLMULTI, &qdev->flags)) {
3464                         if (ql_set_routing_reg
3465                             (qdev, RT_IDX_ALLMULTI_SLOT, RT_IDX_MCAST, 1)) {
3466                                 QPRINTK(qdev, HW, ERR,
3467                                         "Failed to set all-multi mode.\n");
3468                         } else {
3469                                 set_bit(QL_ALLMULTI, &qdev->flags);
3470                         }
3471                 }
3472         } else {
3473                 if (test_bit(QL_ALLMULTI, &qdev->flags)) {
3474                         if (ql_set_routing_reg
3475                             (qdev, RT_IDX_ALLMULTI_SLOT, RT_IDX_MCAST, 0)) {
3476                                 QPRINTK(qdev, HW, ERR,
3477                                         "Failed to clear all-multi mode.\n");
3478                         } else {
3479                                 clear_bit(QL_ALLMULTI, &qdev->flags);
3480                         }
3481                 }
3482         }
3483
3484         if (ndev->mc_count) {
3485                 for (i = 0, mc_ptr = ndev->mc_list; mc_ptr;
3486                      i++, mc_ptr = mc_ptr->next)
3487                         if (ql_set_mac_addr_reg(qdev, (u8 *) mc_ptr->dmi_addr,
3488                                                 MAC_ADDR_TYPE_MULTI_MAC, i)) {
3489                                 QPRINTK(qdev, HW, ERR,
3490                                         "Failed to loadmulticast address.\n");
3491                                 goto exit;
3492                         }
3493                 if (ql_set_routing_reg
3494                     (qdev, RT_IDX_MCAST_MATCH_SLOT, RT_IDX_MCAST_MATCH, 1)) {
3495                         QPRINTK(qdev, HW, ERR,
3496                                 "Failed to set multicast match mode.\n");
3497                 } else {
3498                         set_bit(QL_ALLMULTI, &qdev->flags);
3499                 }
3500         }
3501 exit:
3502         spin_unlock(&qdev->hw_lock);
3503 }
3504
3505 static int qlge_set_mac_address(struct net_device *ndev, void *p)
3506 {
3507         struct ql_adapter *qdev = (struct ql_adapter *)netdev_priv(ndev);
3508         struct sockaddr *addr = p;
3509         int ret = 0;
3510
3511         if (netif_running(ndev))
3512                 return -EBUSY;
3513
3514         if (!is_valid_ether_addr(addr->sa_data))
3515                 return -EADDRNOTAVAIL;
3516         memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len);
3517
3518         spin_lock(&qdev->hw_lock);
3519         if (ql_set_mac_addr_reg(qdev, (u8 *) ndev->dev_addr,
3520                         MAC_ADDR_TYPE_CAM_MAC, qdev->func)) {/* Unicast */
3521                 QPRINTK(qdev, HW, ERR, "Failed to load MAC address.\n");
3522                 ret = -1;
3523         }
3524         spin_unlock(&qdev->hw_lock);
3525
3526         return ret;
3527 }
3528
3529 static void qlge_tx_timeout(struct net_device *ndev)
3530 {
3531         struct ql_adapter *qdev = (struct ql_adapter *)netdev_priv(ndev);
3532         queue_delayed_work(qdev->workqueue, &qdev->asic_reset_work, 0);
3533 }
3534
3535 static void ql_asic_reset_work(struct work_struct *work)
3536 {
3537         struct ql_adapter *qdev =
3538             container_of(work, struct ql_adapter, asic_reset_work.work);
3539         ql_cycle_adapter(qdev);
3540 }
3541
3542 static void ql_get_board_info(struct ql_adapter *qdev)
3543 {
3544         qdev->func =
3545             (ql_read32(qdev, STS) & STS_FUNC_ID_MASK) >> STS_FUNC_ID_SHIFT;
3546         if (qdev->func) {
3547                 qdev->xg_sem_mask = SEM_XGMAC1_MASK;
3548                 qdev->port_link_up = STS_PL1;
3549                 qdev->port_init = STS_PI1;
3550                 qdev->mailbox_in = PROC_ADDR_MPI_RISC | PROC_ADDR_FUNC2_MBI;
3551                 qdev->mailbox_out = PROC_ADDR_MPI_RISC | PROC_ADDR_FUNC2_MBO;
3552         } else {
3553                 qdev->xg_sem_mask = SEM_XGMAC0_MASK;
3554                 qdev->port_link_up = STS_PL0;
3555                 qdev->port_init = STS_PI0;
3556                 qdev->mailbox_in = PROC_ADDR_MPI_RISC | PROC_ADDR_FUNC0_MBI;
3557                 qdev->mailbox_out = PROC_ADDR_MPI_RISC | PROC_ADDR_FUNC0_MBO;
3558         }
3559         qdev->chip_rev_id = ql_read32(qdev, REV_ID);
3560 }
3561
3562 static void ql_release_all(struct pci_dev *pdev)
3563 {
3564         struct net_device *ndev = pci_get_drvdata(pdev);
3565         struct ql_adapter *qdev = netdev_priv(ndev);
3566
3567         if (qdev->workqueue) {
3568                 destroy_workqueue(qdev->workqueue);
3569                 qdev->workqueue = NULL;
3570         }
3571         if (qdev->q_workqueue) {
3572                 destroy_workqueue(qdev->q_workqueue);
3573                 qdev->q_workqueue = NULL;
3574         }
3575         if (qdev->reg_base)
3576                 iounmap(qdev->reg_base);
3577         if (qdev->doorbell_area)
3578                 iounmap(qdev->doorbell_area);
3579         pci_release_regions(pdev);
3580         pci_set_drvdata(pdev, NULL);
3581 }
3582
3583 static int __devinit ql_init_device(struct pci_dev *pdev,
3584                                     struct net_device *ndev, int cards_found)
3585 {
3586         struct ql_adapter *qdev = netdev_priv(ndev);
3587         int pos, err = 0;
3588         u16 val16;
3589
3590         memset((void *)qdev, 0, sizeof(qdev));
3591         err = pci_enable_device(pdev);
3592         if (err) {
3593                 dev_err(&pdev->dev, "PCI device enable failed.\n");
3594                 return err;
3595         }
3596
3597         pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
3598         if (pos <= 0) {
3599                 dev_err(&pdev->dev, PFX "Cannot find PCI Express capability, "
3600                         "aborting.\n");
3601                 goto err_out;
3602         } else {
3603                 pci_read_config_word(pdev, pos + PCI_EXP_DEVCTL, &val16);
3604                 val16 &= ~PCI_EXP_DEVCTL_NOSNOOP_EN;
3605                 val16 |= (PCI_EXP_DEVCTL_CERE |
3606                           PCI_EXP_DEVCTL_NFERE |
3607                           PCI_EXP_DEVCTL_FERE | PCI_EXP_DEVCTL_URRE);
3608                 pci_write_config_word(pdev, pos + PCI_EXP_DEVCTL, val16);
3609         }
3610
3611         err = pci_request_regions(pdev, DRV_NAME);
3612         if (err) {
3613                 dev_err(&pdev->dev, "PCI region request failed.\n");
3614                 goto err_out;
3615         }
3616
3617         pci_set_master(pdev);
3618         if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
3619                 set_bit(QL_DMA64, &qdev->flags);
3620                 err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
3621         } else {
3622                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
3623                 if (!err)
3624                        err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
3625         }
3626
3627         if (err) {
3628                 dev_err(&pdev->dev, "No usable DMA configuration.\n");
3629                 goto err_out;
3630         }
3631
3632         pci_set_drvdata(pdev, ndev);
3633         qdev->reg_base =
3634             ioremap_nocache(pci_resource_start(pdev, 1),
3635                             pci_resource_len(pdev, 1));
3636         if (!qdev->reg_base) {
3637                 dev_err(&pdev->dev, "Register mapping failed.\n");
3638                 err = -ENOMEM;
3639                 goto err_out;
3640         }
3641
3642         qdev->doorbell_area_size = pci_resource_len(pdev, 3);
3643         qdev->doorbell_area =
3644             ioremap_nocache(pci_resource_start(pdev, 3),
3645                             pci_resource_len(pdev, 3));
3646         if (!qdev->doorbell_area) {
3647                 dev_err(&pdev->dev, "Doorbell register mapping failed.\n");
3648                 err = -ENOMEM;
3649                 goto err_out;
3650         }
3651
3652         ql_get_board_info(qdev);
3653         qdev->ndev = ndev;
3654         qdev->pdev = pdev;
3655         qdev->msg_enable = netif_msg_init(debug, default_msg);
3656         spin_lock_init(&qdev->hw_lock);
3657         spin_lock_init(&qdev->stats_lock);
3658
3659         /* make sure the EEPROM is good */
3660         err = ql_get_flash_params(qdev);
3661         if (err) {
3662                 dev_err(&pdev->dev, "Invalid FLASH.\n");
3663                 goto err_out;
3664         }
3665
3666         if (!is_valid_ether_addr(qdev->flash.mac_addr))
3667                 goto err_out;
3668
3669         memcpy(ndev->dev_addr, qdev->flash.mac_addr, ndev->addr_len);
3670         memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len);
3671
3672         /* Set up the default ring sizes. */
3673         qdev->tx_ring_size = NUM_TX_RING_ENTRIES;
3674         qdev->rx_ring_size = NUM_RX_RING_ENTRIES;
3675
3676         /* Set up the coalescing parameters. */
3677         qdev->rx_coalesce_usecs = DFLT_COALESCE_WAIT;
3678         qdev->tx_coalesce_usecs = DFLT_COALESCE_WAIT;
3679         qdev->rx_max_coalesced_frames = DFLT_INTER_FRAME_WAIT;
3680         qdev->tx_max_coalesced_frames = DFLT_INTER_FRAME_WAIT;
3681
3682         /*
3683          * Set up the operating parameters.
3684          */
3685         qdev->rx_csum = 1;
3686
3687         qdev->q_workqueue = create_workqueue(ndev->name);
3688         qdev->workqueue = create_singlethread_workqueue(ndev->name);
3689         INIT_DELAYED_WORK(&qdev->asic_reset_work, ql_asic_reset_work);
3690         INIT_DELAYED_WORK(&qdev->mpi_reset_work, ql_mpi_reset_work);
3691         INIT_DELAYED_WORK(&qdev->mpi_work, ql_mpi_work);
3692
3693         if (!cards_found) {
3694                 dev_info(&pdev->dev, "%s\n", DRV_STRING);
3695                 dev_info(&pdev->dev, "Driver name: %s, Version: %s.\n",
3696                          DRV_NAME, DRV_VERSION);
3697         }
3698         return 0;
3699 err_out:
3700         ql_release_all(pdev);
3701         pci_disable_device(pdev);
3702         return err;
3703 }
3704
3705
3706 static const struct net_device_ops qlge_netdev_ops = {
3707         .ndo_open               = qlge_open,
3708         .ndo_stop               = qlge_close,
3709         .ndo_start_xmit         = qlge_send,
3710         .ndo_change_mtu         = qlge_change_mtu,
3711         .ndo_get_stats          = qlge_get_stats,
3712         .ndo_set_multicast_list = qlge_set_multicast_list,
3713         .ndo_set_mac_address    = qlge_set_mac_address,
3714         .ndo_validate_addr      = eth_validate_addr,
3715         .ndo_tx_timeout         = qlge_tx_timeout,
3716         .ndo_vlan_rx_register   = ql_vlan_rx_register,
3717         .ndo_vlan_rx_add_vid    = ql_vlan_rx_add_vid,
3718         .ndo_vlan_rx_kill_vid   = ql_vlan_rx_kill_vid,
3719 };
3720
3721 static int __devinit qlge_probe(struct pci_dev *pdev,
3722                                 const struct pci_device_id *pci_entry)
3723 {
3724         struct net_device *ndev = NULL;
3725         struct ql_adapter *qdev = NULL;
3726         static int cards_found = 0;
3727         int err = 0;
3728
3729         ndev = alloc_etherdev(sizeof(struct ql_adapter));
3730         if (!ndev)
3731                 return -ENOMEM;
3732
3733         err = ql_init_device(pdev, ndev, cards_found);
3734         if (err < 0) {
3735                 free_netdev(ndev);
3736                 return err;
3737         }
3738
3739         qdev = netdev_priv(ndev);
3740         SET_NETDEV_DEV(ndev, &pdev->dev);
3741         ndev->features = (0
3742                           | NETIF_F_IP_CSUM
3743                           | NETIF_F_SG
3744                           | NETIF_F_TSO
3745                           | NETIF_F_TSO6
3746                           | NETIF_F_TSO_ECN
3747                           | NETIF_F_HW_VLAN_TX
3748                           | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER);
3749
3750         if (test_bit(QL_DMA64, &qdev->flags))
3751                 ndev->features |= NETIF_F_HIGHDMA;
3752
3753         /*
3754          * Set up net_device structure.
3755          */
3756         ndev->tx_queue_len = qdev->tx_ring_size;
3757         ndev->irq = pdev->irq;
3758
3759         ndev->netdev_ops = &qlge_netdev_ops;
3760         SET_ETHTOOL_OPS(ndev, &qlge_ethtool_ops);
3761         ndev->watchdog_timeo = 10 * HZ;
3762
3763         err = register_netdev(ndev);
3764         if (err) {
3765                 dev_err(&pdev->dev, "net device registration failed.\n");
3766                 ql_release_all(pdev);
3767                 pci_disable_device(pdev);
3768                 return err;
3769         }
3770         netif_carrier_off(ndev);
3771         netif_stop_queue(ndev);
3772         ql_display_dev_info(ndev);
3773         cards_found++;
3774         return 0;
3775 }
3776
3777 static void __devexit qlge_remove(struct pci_dev *pdev)
3778 {
3779         struct net_device *ndev = pci_get_drvdata(pdev);
3780         unregister_netdev(ndev);
3781         ql_release_all(pdev);
3782         pci_disable_device(pdev);
3783         free_netdev(ndev);
3784 }
3785
3786 /*
3787  * This callback is called by the PCI subsystem whenever
3788  * a PCI bus error is detected.
3789  */
3790 static pci_ers_result_t qlge_io_error_detected(struct pci_dev *pdev,
3791                                                enum pci_channel_state state)
3792 {
3793         struct net_device *ndev = pci_get_drvdata(pdev);
3794         struct ql_adapter *qdev = netdev_priv(ndev);
3795
3796         if (netif_running(ndev))
3797                 ql_adapter_down(qdev);
3798
3799         pci_disable_device(pdev);
3800
3801         /* Request a slot reset. */
3802         return PCI_ERS_RESULT_NEED_RESET;
3803 }
3804
3805 /*
3806  * This callback is called after the PCI buss has been reset.
3807  * Basically, this tries to restart the card from scratch.
3808  * This is a shortened version of the device probe/discovery code,
3809  * it resembles the first-half of the () routine.
3810  */
3811 static pci_ers_result_t qlge_io_slot_reset(struct pci_dev *pdev)
3812 {
3813         struct net_device *ndev = pci_get_drvdata(pdev);
3814         struct ql_adapter *qdev = netdev_priv(ndev);
3815
3816         if (pci_enable_device(pdev)) {
3817                 QPRINTK(qdev, IFUP, ERR,
3818                         "Cannot re-enable PCI device after reset.\n");
3819                 return PCI_ERS_RESULT_DISCONNECT;
3820         }
3821
3822         pci_set_master(pdev);
3823
3824         netif_carrier_off(ndev);
3825         netif_stop_queue(ndev);
3826         ql_adapter_reset(qdev);
3827
3828         /* Make sure the EEPROM is good */
3829         memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len);
3830
3831         if (!is_valid_ether_addr(ndev->perm_addr)) {
3832                 QPRINTK(qdev, IFUP, ERR, "After reset, invalid MAC address.\n");
3833                 return PCI_ERS_RESULT_DISCONNECT;
3834         }
3835
3836         return PCI_ERS_RESULT_RECOVERED;
3837 }
3838
3839 static void qlge_io_resume(struct pci_dev *pdev)
3840 {
3841         struct net_device *ndev = pci_get_drvdata(pdev);
3842         struct ql_adapter *qdev = netdev_priv(ndev);
3843
3844         pci_set_master(pdev);
3845
3846         if (netif_running(ndev)) {
3847                 if (ql_adapter_up(qdev)) {
3848                         QPRINTK(qdev, IFUP, ERR,
3849                                 "Device initialization failed after reset.\n");
3850                         return;
3851                 }
3852         }
3853
3854         netif_device_attach(ndev);
3855 }
3856
3857 static struct pci_error_handlers qlge_err_handler = {
3858         .error_detected = qlge_io_error_detected,
3859         .slot_reset = qlge_io_slot_reset,
3860         .resume = qlge_io_resume,
3861 };
3862
3863 static int qlge_suspend(struct pci_dev *pdev, pm_message_t state)
3864 {
3865         struct net_device *ndev = pci_get_drvdata(pdev);
3866         struct ql_adapter *qdev = netdev_priv(ndev);
3867         int err;
3868
3869         netif_device_detach(ndev);
3870
3871         if (netif_running(ndev)) {
3872                 err = ql_adapter_down(qdev);
3873                 if (!err)
3874                         return err;
3875         }
3876
3877         err = pci_save_state(pdev);
3878         if (err)
3879                 return err;
3880
3881         pci_disable_device(pdev);
3882
3883         pci_set_power_state(pdev, pci_choose_state(pdev, state));
3884
3885         return 0;
3886 }
3887
3888 #ifdef CONFIG_PM
3889 static int qlge_resume(struct pci_dev *pdev)
3890 {
3891         struct net_device *ndev = pci_get_drvdata(pdev);
3892         struct ql_adapter *qdev = netdev_priv(ndev);
3893         int err;
3894
3895         pci_set_power_state(pdev, PCI_D0);
3896         pci_restore_state(pdev);
3897         err = pci_enable_device(pdev);
3898         if (err) {
3899                 QPRINTK(qdev, IFUP, ERR, "Cannot enable PCI device from suspend\n");
3900                 return err;
3901         }
3902         pci_set_master(pdev);
3903
3904         pci_enable_wake(pdev, PCI_D3hot, 0);
3905         pci_enable_wake(pdev, PCI_D3cold, 0);
3906
3907         if (netif_running(ndev)) {
3908                 err = ql_adapter_up(qdev);
3909                 if (err)
3910                         return err;
3911         }
3912
3913         netif_device_attach(ndev);
3914
3915         return 0;
3916 }
3917 #endif /* CONFIG_PM */
3918
3919 static void qlge_shutdown(struct pci_dev *pdev)
3920 {
3921         qlge_suspend(pdev, PMSG_SUSPEND);
3922 }
3923
3924 static struct pci_driver qlge_driver = {
3925         .name = DRV_NAME,
3926         .id_table = qlge_pci_tbl,
3927         .probe = qlge_probe,
3928         .remove = __devexit_p(qlge_remove),
3929 #ifdef CONFIG_PM
3930         .suspend = qlge_suspend,
3931         .resume = qlge_resume,
3932 #endif
3933         .shutdown = qlge_shutdown,
3934         .err_handler = &qlge_err_handler
3935 };
3936
3937 static int __init qlge_init_module(void)
3938 {
3939         return pci_register_driver(&qlge_driver);
3940 }
3941
3942 static void __exit qlge_exit(void)
3943 {
3944         pci_unregister_driver(&qlge_driver);
3945 }
3946
3947 module_init(qlge_init_module);
3948 module_exit(qlge_exit);