drivers/infiniband/hw/nes/nes.c

   1 /*
   2  * Copyright (c) 2006 - 2011 Intel Corporation.  All rights reserved.
   3  * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include <linux/module.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/netdevice.h>
  37 #include <linux/etherdevice.h>
  38 #include <linux/ethtool.h>
  39 #include <linux/mii.h>
  40 #include <linux/if_vlan.h>
  41 #include <linux/crc32.h>
  42 #include <linux/in.h>
  43 #include <linux/fs.h>
  44 #include <linux/init.h>
  45 #include <linux/if_arp.h>
  46 #include <linux/highmem.h>
  47 #include <linux/slab.h>
  48 #include <asm/io.h>
  49 #include <asm/irq.h>
  50 #include <asm/byteorder.h>
  51 #include <rdma/ib_smi.h>
  52 #include <rdma/ib_verbs.h>
  53 #include <rdma/ib_pack.h>
  54 #include <rdma/iw_cm.h>
  55
  56 #include "nes.h"
  57
  58 #include <net/netevent.h>
  59 #include <net/neighbour.h>
  60 #include <linux/route.h>
  61 #include <net/ip_fib.h>
  62
  63 MODULE_AUTHOR("NetEffect");
  64 MODULE_DESCRIPTION("NetEffect RNIC Low-level iWARP Driver");
  65 MODULE_LICENSE("Dual BSD/GPL");
  66 MODULE_VERSION(DRV_VERSION);
  67
  68 int max_mtu = 9000;
  69 int interrupt_mod_interval = 0;
  70
  71 /* Interoperability */
  72 int mpa_version = 1;
  73 module_param(mpa_version, int, 0644);
  74 MODULE_PARM_DESC(mpa_version, "MPA version to be used int MPA Req/Resp (0 or 1)");
  75
  76 /* Interoperability */
  77 int disable_mpa_crc = 0;
  78 module_param(disable_mpa_crc, int, 0644);
  79 MODULE_PARM_DESC(disable_mpa_crc, "Disable checking of MPA CRC");
  80
  81 unsigned int nes_drv_opt = NES_DRV_OPT_DISABLE_INT_MOD | NES_DRV_OPT_ENABLE_PAU;
  82 module_param(nes_drv_opt, int, 0644);
  83 MODULE_PARM_DESC(nes_drv_opt, "Driver option parameters");
  84
  85 unsigned int nes_debug_level = 0;
  86 module_param_named(debug_level, nes_debug_level, uint, 0644);
  87 MODULE_PARM_DESC(debug_level, "Enable debug output level");
  88
  89 unsigned int wqm_quanta = 0x10000;
  90 module_param(wqm_quanta, int, 0644);
  91 MODULE_PARM_DESC(wqm_quanta, "WQM quanta");
  92
  93 static bool limit_maxrdreqsz;
  94 module_param(limit_maxrdreqsz, bool, 0644);
  95 MODULE_PARM_DESC(limit_maxrdreqsz, "Limit max read request size to 256 Bytes");
  96
  97 LIST_HEAD(nes_adapter_list);
  98 static LIST_HEAD(nes_dev_list);
  99
 100 atomic_t qps_destroyed;
 101
 102 static unsigned int ee_flsh_adapter;
 103 static unsigned int sysfs_nonidx_addr;
 104 static unsigned int sysfs_idx_addr;
 105
 106 static struct pci_device_id nes_pci_table[] = {
 107         { PCI_VDEVICE(NETEFFECT, PCI_DEVICE_ID_NETEFFECT_NE020), },
 108         { PCI_VDEVICE(NETEFFECT, PCI_DEVICE_ID_NETEFFECT_NE020_KR), },
 109         {0}
 110 };
 111
 112 MODULE_DEVICE_TABLE(pci, nes_pci_table);
 113
 114 /* registered nes netlink callbacks */
 115 static struct ibnl_client_cbs nes_nl_cb_table[] = {
 116         [RDMA_NL_IWPM_REG_PID] = {.dump = iwpm_register_pid_cb},
 117         [RDMA_NL_IWPM_ADD_MAPPING] = {.dump = iwpm_add_mapping_cb},
 118         [RDMA_NL_IWPM_QUERY_MAPPING] = {.dump = iwpm_add_and_query_mapping_cb},
 119         [RDMA_NL_IWPM_HANDLE_ERR] = {.dump = iwpm_mapping_error_cb},
 120         [RDMA_NL_IWPM_MAPINFO] = {.dump = iwpm_mapping_info_cb},
 121         [RDMA_NL_IWPM_MAPINFO_NUM] = {.dump = iwpm_ack_mapping_info_cb}
 122 };
 123
 124 static int nes_inetaddr_event(struct notifier_block *, unsigned long, void *);
 125 static int nes_net_event(struct notifier_block *, unsigned long, void *);
 126 static int nes_notifiers_registered;
 127
 128
 129 static struct notifier_block nes_inetaddr_notifier = {
 130         .notifier_call = nes_inetaddr_event
 131 };
 132
 133 static struct notifier_block nes_net_notifier = {
 134         .notifier_call = nes_net_event
 135 };
 136
 137 /**
 138  * nes_inetaddr_event
 139  */
 140 static int nes_inetaddr_event(struct notifier_block *notifier,
 141                 unsigned long event, void *ptr)
 142 {
 143         struct in_ifaddr *ifa = ptr;
 144         struct net_device *event_netdev = ifa->ifa_dev->dev;
 145         struct nes_device *nesdev;
 146         struct net_device *netdev;
 147         struct net_device *upper_dev;
 148         struct nes_vnic *nesvnic;
 149         unsigned int is_bonded;
 150
 151         nes_debug(NES_DBG_NETDEV, "nes_inetaddr_event: ip address %pI4, netmask %pI4.\n",
 152                   &ifa->ifa_address, &ifa->ifa_mask);
 153         list_for_each_entry(nesdev, &nes_dev_list, list) {
 154                 nes_debug(NES_DBG_NETDEV, "Nesdev list entry = 0x%p. (%s)\n",
 155                                 nesdev, nesdev->netdev[0]->name);
 156                 netdev = nesdev->netdev[0];
 157                 nesvnic = netdev_priv(netdev);
 158                 upper_dev = netdev_master_upper_dev_get(netdev);
 159                 is_bonded = netif_is_bond_slave(netdev) &&
 160                             (upper_dev == event_netdev);
 161                 if ((netdev == event_netdev) || is_bonded) {
 162                         if (nesvnic->rdma_enabled == 0) {
 163                                 nes_debug(NES_DBG_NETDEV, "Returning without processing event for %s since"
 164                                                 " RDMA is not enabled.\n",
 165                                                 netdev->name);
 166                                 return NOTIFY_OK;
 167                         }
 168                         /* we have ifa->ifa_address/mask here if we need it */
 169                         switch (event) {
 170                                 case NETDEV_DOWN:
 171                                         nes_debug(NES_DBG_NETDEV, "event:DOWN\n");
 172                                         nes_write_indexed(nesdev,
 173                                                         NES_IDX_DST_IP_ADDR+(0x10*PCI_FUNC(nesdev->pcidev->devfn)), 0);
 174
 175                                         nes_manage_arp_cache(netdev, netdev->dev_addr,
 176                                                         ntohl(nesvnic->local_ipaddr), NES_ARP_DELETE);
 177                                         nesvnic->local_ipaddr = 0;
 178                                         if (is_bonded)
 179                                                 continue;
 180                                         else
 181                                                 return NOTIFY_OK;
 182                                         break;
 183                                 case NETDEV_UP:
 184                                         nes_debug(NES_DBG_NETDEV, "event:UP\n");
 185
 186                                         if (nesvnic->local_ipaddr != 0) {
 187                                                 nes_debug(NES_DBG_NETDEV, "Interface already has local_ipaddr\n");
 188                                                 return NOTIFY_OK;
 189                                         }
 190                                         /* fall through */
 191                                 case NETDEV_CHANGEADDR:
 192                                         /* Add the address to the IP table */
 193                                         if (upper_dev)
 194                                                 nesvnic->local_ipaddr =
 195                                                         ((struct in_device *)upper_dev->ip_ptr)->ifa_list->ifa_address;
 196                                         else
 197                                                 nesvnic->local_ipaddr = ifa->ifa_address;
 198
 199                                         nes_write_indexed(nesdev,
 200                                                         NES_IDX_DST_IP_ADDR+(0x10*PCI_FUNC(nesdev->pcidev->devfn)),
 201                                                         ntohl(nesvnic->local_ipaddr));
 202                                         nes_manage_arp_cache(netdev, netdev->dev_addr,
 203                                                         ntohl(nesvnic->local_ipaddr), NES_ARP_ADD);
 204                                         if (is_bonded)
 205                                                 continue;
 206                                         else
 207                                                 return NOTIFY_OK;
 208                                         break;
 209                                 default:
 210                                         break;
 211                         }
 212                 }
 213         }
 214
 215         return NOTIFY_DONE;
 216 }
 217
 218
 219 /**
 220  * nes_net_event
 221  */
 222 static int nes_net_event(struct notifier_block *notifier,
 223                 unsigned long event, void *ptr)
 224 {
 225         struct neighbour *neigh = ptr;
 226         struct nes_device *nesdev;
 227         struct net_device *netdev;
 228         struct nes_vnic *nesvnic;
 229
 230         switch (event) {
 231                 case NETEVENT_NEIGH_UPDATE:
 232                         list_for_each_entry(nesdev, &nes_dev_list, list) {
 233                                 /* nes_debug(NES_DBG_NETDEV, "Nesdev list entry = 0x%p.\n", nesdev); */
 234                                 netdev = nesdev->netdev[0];
 235                                 nesvnic = netdev_priv(netdev);
 236                                 if (netdev == neigh->dev) {
 237                                         if (nesvnic->rdma_enabled == 0) {
 238                                                 nes_debug(NES_DBG_NETDEV, "Skipping device %s since no RDMA\n",
 239                                                                 netdev->name);
 240                                         } else {
 241                                                 if (neigh->nud_state & NUD_VALID) {
 242                                                         nes_manage_arp_cache(neigh->dev, neigh->ha,
 243                                                                         ntohl(*(__be32 *)neigh->primary_key), NES_ARP_ADD);
 244                                                 } else {
 245                                                         nes_manage_arp_cache(neigh->dev, neigh->ha,
 246                                                                         ntohl(*(__be32 *)neigh->primary_key), NES_ARP_DELETE);
 247                                                 }
 248                                         }
 249                                         return NOTIFY_OK;
 250                                 }
 251                         }
 252                         break;
 253                 default:
 254                         nes_debug(NES_DBG_NETDEV, "NETEVENT_ %lu undefined\n", event);
 255                         break;
 256         }
 257
 258         return NOTIFY_DONE;
 259 }
 260
 261
 262 /**
 263  * nes_add_ref
 264  */
 265 void nes_add_ref(struct ib_qp *ibqp)
 266 {
 267         struct nes_qp *nesqp;
 268
 269         nesqp = to_nesqp(ibqp);
 270         nes_debug(NES_DBG_QP, "Bumping refcount for QP%u.  Pre-inc value = %u\n",
 271                         ibqp->qp_num, atomic_read(&nesqp->refcount));
 272         atomic_inc(&nesqp->refcount);
 273 }
 274
 275 static void nes_cqp_rem_ref_callback(struct nes_device *nesdev, struct nes_cqp_request *cqp_request)
 276 {
 277         unsigned long flags;
 278         struct nes_qp *nesqp = cqp_request->cqp_callback_pointer;
 279         struct nes_adapter *nesadapter = nesdev->nesadapter;
 280
 281         atomic_inc(&qps_destroyed);
 282
 283         /* Free the control structures */
 284
 285         if (nesqp->pbl_vbase) {
 286                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
 287                                 nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
 288                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 289                 nesadapter->free_256pbl++;
 290                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 291                 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
 292                 nesqp->pbl_vbase = NULL;
 293
 294         } else {
 295                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
 296                                 nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
 297         }
 298         nes_free_resource(nesadapter, nesadapter->allocated_qps, nesqp->hwqp.qp_id);
 299
 300         nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = NULL;
 301         kfree(nesqp->allocated_buffer);
 302
 303 }
 304
 305 /**
 306  * nes_rem_ref
 307  */
 308 void nes_rem_ref(struct ib_qp *ibqp)
 309 {
 310         u64 u64temp;
 311         struct nes_qp *nesqp;
 312         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
 313         struct nes_device *nesdev = nesvnic->nesdev;
 314         struct nes_hw_cqp_wqe *cqp_wqe;
 315         struct nes_cqp_request *cqp_request;
 316         u32 opcode;
 317
 318         nesqp = to_nesqp(ibqp);
 319
 320         if (atomic_read(&nesqp->refcount) == 0) {
 321                 printk(KERN_INFO PFX "%s: Reference count already 0 for QP%d, last aeq = 0x%04X.\n",
 322                                 __func__, ibqp->qp_num, nesqp->last_aeq);
 323                 BUG();
 324         }
 325
 326         if (atomic_dec_and_test(&nesqp->refcount)) {
 327                 if (nesqp->pau_mode)
 328                         nes_destroy_pau_qp(nesdev, nesqp);
 329
 330                 /* Destroy the QP */
 331                 cqp_request = nes_get_cqp_request(nesdev);
 332                 if (cqp_request == NULL) {
 333                         nes_debug(NES_DBG_QP, "Failed to get a cqp_request.\n");
 334                         return;
 335                 }
 336                 cqp_request->waiting = 0;
 337                 cqp_request->callback = 1;
 338                 cqp_request->cqp_callback = nes_cqp_rem_ref_callback;
 339                 cqp_request->cqp_callback_pointer = nesqp;
 340                 cqp_wqe = &cqp_request->cqp_wqe;
 341
 342                 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 343                 opcode = NES_CQP_DESTROY_QP | NES_CQP_QP_TYPE_IWARP;
 344
 345                 if (nesqp->hte_added) {
 346                         opcode  |= NES_CQP_QP_DEL_HTE;
 347                         nesqp->hte_added = 0;
 348                 }
 349                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
 350                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
 351                 u64temp = (u64)nesqp->nesqp_context_pbase;
 352                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
 353                 nes_post_cqp_request(nesdev, cqp_request);
 354         }
 355 }
 356
 357
 358 /**
 359  * nes_get_qp
 360  */
 361 struct ib_qp *nes_get_qp(struct ib_device *device, int qpn)
 362 {
 363         struct nes_vnic *nesvnic = to_nesvnic(device);
 364         struct nes_device *nesdev = nesvnic->nesdev;
 365         struct nes_adapter *nesadapter = nesdev->nesadapter;
 366
 367         if ((qpn < NES_FIRST_QPN) || (qpn >= (NES_FIRST_QPN + nesadapter->max_qp)))
 368                 return NULL;
 369
 370         return &nesadapter->qp_table[qpn - NES_FIRST_QPN]->ibqp;
 371 }
 372
 373
 374 /**
 375  * nes_print_macaddr
 376  */
 377 static void nes_print_macaddr(struct net_device *netdev)
 378 {
 379         nes_debug(NES_DBG_INIT, "%s: %pM, IRQ %u\n",
 380                   netdev->name, netdev->dev_addr, netdev->irq);
 381 }
 382
 383 /**
 384  * nes_interrupt - handle interrupts
 385  */
 386 static irqreturn_t nes_interrupt(int irq, void *dev_id)
 387 {
 388         struct nes_device *nesdev = (struct nes_device *)dev_id;
 389         int handled = 0;
 390         u32 int_mask;
 391         u32 int_req;
 392         u32 int_stat;
 393         u32 intf_int_stat;
 394         u32 timer_stat;
 395
 396         if (nesdev->msi_enabled) {
 397                 /* No need to read the interrupt pending register if msi is enabled */
 398                 handled = 1;
 399         } else {
 400                 if (unlikely(nesdev->nesadapter->hw_rev == NE020_REV)) {
 401                         /* Master interrupt enable provides synchronization for kicking off bottom half
 402                           when interrupt sharing is going on */
 403                         int_mask = nes_read32(nesdev->regs + NES_INT_MASK);
 404                         if (int_mask & 0x80000000) {
 405                                 /* Check interrupt status to see if this might be ours */
 406                                 int_stat = nes_read32(nesdev->regs + NES_INT_STAT);
 407                                 int_req = nesdev->int_req;
 408                                 if (int_stat&int_req) {
 409                                         /* if interesting CEQ or AEQ is pending, claim the interrupt */
 410                                         if ((int_stat&int_req) & (~(NES_INT_TIMER|NES_INT_INTF))) {
 411                                                 handled = 1;
 412                                         } else {
 413                                                 if (((int_stat & int_req) & NES_INT_TIMER) == NES_INT_TIMER) {
 414                                                         /* Timer might be running but might be for another function */
 415                                                         timer_stat = nes_read32(nesdev->regs + NES_TIMER_STAT);
 416                                                         if ((timer_stat & nesdev->timer_int_req) != 0) {
 417                                                                 handled = 1;
 418                                                         }
 419                                                 }
 420                                                 if ((((int_stat & int_req) & NES_INT_INTF) == NES_INT_INTF) &&
 421                                                                 (handled == 0)) {
 422                                                         intf_int_stat = nes_read32(nesdev->regs+NES_INTF_INT_STAT);
 423                                                         if ((intf_int_stat & nesdev->intf_int_req) != 0) {
 424                                                                 handled = 1;
 425                                                         }
 426                                                 }
 427                                         }
 428                                         if (handled) {
 429                                                 nes_write32(nesdev->regs+NES_INT_MASK, int_mask & (~0x80000000));
 430                                                 int_mask = nes_read32(nesdev->regs+NES_INT_MASK);
 431                                                 /* Save off the status to save an additional read */
 432                                                 nesdev->int_stat = int_stat;
 433                                                 nesdev->napi_isr_ran = 1;
 434                                         }
 435                                 }
 436                         }
 437                 } else {
 438                         handled = nes_read32(nesdev->regs+NES_INT_PENDING);
 439                 }
 440         }
 441
 442         if (handled) {
 443
 444                 if (nes_napi_isr(nesdev) == 0) {
 445                         tasklet_schedule(&nesdev->dpc_tasklet);
 446
 447                 }
 448                 return IRQ_HANDLED;
 449         } else {
 450                 return IRQ_NONE;
 451         }
 452 }
 453
 454
 455 /**
 456  * nes_probe - Device initialization
 457  */
 458 static int nes_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
 459 {
 460         struct net_device *netdev = NULL;
 461         struct nes_device *nesdev = NULL;
 462         int ret = 0;
 463         void __iomem *mmio_regs = NULL;
 464         u8 hw_rev;
 465
 466         assert(pcidev != NULL);
 467         assert(ent != NULL);
 468
 469         printk(KERN_INFO PFX "NetEffect RNIC driver v%s loading. (%s)\n",
 470                         DRV_VERSION, pci_name(pcidev));
 471
 472         ret = pci_enable_device(pcidev);
 473         if (ret) {
 474                 printk(KERN_ERR PFX "Unable to enable PCI device. (%s)\n", pci_name(pcidev));
 475                 goto bail0;
 476         }
 477
 478         nes_debug(NES_DBG_INIT, "BAR0 (@0x%08lX) size = 0x%lX bytes\n",
 479                         (long unsigned int)pci_resource_start(pcidev, BAR_0),
 480                         (long unsigned int)pci_resource_len(pcidev, BAR_0));
 481         nes_debug(NES_DBG_INIT, "BAR1 (@0x%08lX) size = 0x%lX bytes\n",
 482                         (long unsigned int)pci_resource_start(pcidev, BAR_1),
 483                         (long unsigned int)pci_resource_len(pcidev, BAR_1));
 484
 485         /* Make sure PCI base addr are MMIO */
 486         if (!(pci_resource_flags(pcidev, BAR_0) & IORESOURCE_MEM) ||
 487                         !(pci_resource_flags(pcidev, BAR_1) & IORESOURCE_MEM)) {
 488                 printk(KERN_ERR PFX "PCI regions not an MMIO resource\n");
 489                 ret = -ENODEV;
 490                 goto bail1;
 491         }
 492
 493         /* Reserve PCI I/O and memory resources */
 494         ret = pci_request_regions(pcidev, DRV_NAME);
 495         if (ret) {
 496                 printk(KERN_ERR PFX "Unable to request regions. (%s)\n", pci_name(pcidev));
 497                 goto bail1;
 498         }
 499
 500         if ((sizeof(dma_addr_t) > 4)) {
 501                 ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(64));
 502                 if (ret < 0) {
 503                         printk(KERN_ERR PFX "64b DMA mask configuration failed\n");
 504                         goto bail2;
 505                 }
 506                 ret = pci_set_consistent_dma_mask(pcidev, DMA_BIT_MASK(64));
 507                 if (ret) {
 508                         printk(KERN_ERR PFX "64b DMA consistent mask configuration failed\n");
 509                         goto bail2;
 510                 }
 511         } else {
 512                 ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(32));
 513                 if (ret < 0) {
 514                         printk(KERN_ERR PFX "32b DMA mask configuration failed\n");
 515                         goto bail2;
 516                 }
 517                 ret = pci_set_consistent_dma_mask(pcidev, DMA_BIT_MASK(32));
 518                 if (ret) {
 519                         printk(KERN_ERR PFX "32b DMA consistent mask configuration failed\n");
 520                         goto bail2;
 521                 }
 522         }
 523
 524         pci_set_master(pcidev);
 525
 526         /* Allocate hardware structure */
 527         nesdev = kzalloc(sizeof(struct nes_device), GFP_KERNEL);
 528         if (!nesdev) {
 529                 printk(KERN_ERR PFX "%s: Unable to alloc hardware struct\n", pci_name(pcidev));
 530                 ret = -ENOMEM;
 531                 goto bail2;
 532         }
 533
 534         nes_debug(NES_DBG_INIT, "Allocated nes device at %p\n", nesdev);
 535         nesdev->pcidev = pcidev;
 536         pci_set_drvdata(pcidev, nesdev);
 537
 538         pci_read_config_byte(pcidev, 0x0008, &hw_rev);
 539         nes_debug(NES_DBG_INIT, "hw_rev=%u\n", hw_rev);
 540
 541         spin_lock_init(&nesdev->indexed_regs_lock);
 542
 543         /* Remap the PCI registers in adapter BAR0 to kernel VA space */
 544         mmio_regs = ioremap_nocache(pci_resource_start(pcidev, BAR_0),
 545                                     pci_resource_len(pcidev, BAR_0));
 546         if (mmio_regs == NULL) {
 547                 printk(KERN_ERR PFX "Unable to remap BAR0\n");
 548                 ret = -EIO;
 549                 goto bail3;
 550         }
 551         nesdev->regs = mmio_regs;
 552         nesdev->index_reg = 0x50 + (PCI_FUNC(pcidev->devfn)*8) + mmio_regs;
 553
 554         /* Ensure interrupts are disabled */
 555         nes_write32(nesdev->regs+NES_INT_MASK, 0x7fffffff);
 556
 557         if (nes_drv_opt & NES_DRV_OPT_ENABLE_MSI) {
 558                 if (!pci_enable_msi(nesdev->pcidev)) {
 559                         nesdev->msi_enabled = 1;
 560                         nes_debug(NES_DBG_INIT, "MSI is enabled for device %s\n",
 561                                         pci_name(pcidev));
 562                 } else {
 563                         nes_debug(NES_DBG_INIT, "MSI is disabled by linux for device %s\n",
 564                                         pci_name(pcidev));
 565                 }
 566         } else {
 567                 nes_debug(NES_DBG_INIT, "MSI not requested due to driver options for device %s\n",
 568                                 pci_name(pcidev));
 569         }
 570
 571         nesdev->csr_start = pci_resource_start(nesdev->pcidev, BAR_0);
 572         nesdev->doorbell_region = pci_resource_start(nesdev->pcidev, BAR_1);
 573
 574         /* Init the adapter */
 575         nesdev->nesadapter = nes_init_adapter(nesdev, hw_rev);
 576         if (!nesdev->nesadapter) {
 577                 printk(KERN_ERR PFX "Unable to initialize adapter.\n");
 578                 ret = -ENOMEM;
 579                 goto bail5;
 580         }
 581         nesdev->nesadapter->et_rx_coalesce_usecs_irq = interrupt_mod_interval;
 582         nesdev->nesadapter->wqm_quanta = wqm_quanta;
 583
 584         /* nesdev->base_doorbell_index =
 585                         nesdev->nesadapter->pd_config_base[PCI_FUNC(nesdev->pcidev->devfn)]; */
 586         nesdev->base_doorbell_index = 1;
 587         nesdev->doorbell_start = nesdev->nesadapter->doorbell_start;
 588         if (nesdev->nesadapter->phy_type[0] == NES_PHY_TYPE_PUMA_1G) {
 589                 switch (PCI_FUNC(nesdev->pcidev->devfn) %
 590                         nesdev->nesadapter->port_count) {
 591                 case 1:
 592                         nesdev->mac_index = 2;
 593                         break;
 594                 case 2:
 595                         nesdev->mac_index = 1;
 596                         break;
 597                 case 3:
 598                         nesdev->mac_index = 3;
 599                         break;
 600                 case 0:
 601                 default:
 602                         nesdev->mac_index = 0;
 603                 }
 604         } else {
 605                 nesdev->mac_index = PCI_FUNC(nesdev->pcidev->devfn) %
 606                                                 nesdev->nesadapter->port_count;
 607         }
 608
 609         if ((limit_maxrdreqsz ||
 610              ((nesdev->nesadapter->phy_type[0] == NES_PHY_TYPE_GLADIUS) &&
 611               (hw_rev == NE020_REV1))) &&
 612             (pcie_get_readrq(pcidev) > 256)) {
 613                 if (pcie_set_readrq(pcidev, 256))
 614                         printk(KERN_ERR PFX "Unable to set max read request"
 615                                 " to 256 bytes\n");
 616                 else
 617                         nes_debug(NES_DBG_INIT, "Max read request size set"
 618                                 " to 256 bytes\n");
 619         }
 620
 621         tasklet_init(&nesdev->dpc_tasklet, nes_dpc, (unsigned long)nesdev);
 622
 623         /* bring up the Control QP */
 624         if (nes_init_cqp(nesdev)) {
 625                 ret = -ENODEV;
 626                 goto bail6;
 627         }
 628
 629         /* Arm the CCQ */
 630         nes_write32(nesdev->regs+NES_CQE_ALLOC, NES_CQE_ALLOC_NOTIFY_NEXT |
 631                         PCI_FUNC(nesdev->pcidev->devfn));
 632         nes_read32(nesdev->regs+NES_CQE_ALLOC);
 633
 634         /* Enable the interrupts */
 635         nesdev->int_req = (0x101 << PCI_FUNC(nesdev->pcidev->devfn)) |
 636                         (1 << (PCI_FUNC(nesdev->pcidev->devfn)+16));
 637         if (PCI_FUNC(nesdev->pcidev->devfn) < 4) {
 638                 nesdev->int_req |= (1 << (PCI_FUNC(nesdev->mac_index)+24));
 639         }
 640
 641         /* TODO: This really should be the first driver to load, not function 0 */
 642         if (PCI_FUNC(nesdev->pcidev->devfn) == 0) {
 643                 /* pick up PCI and critical errors if the first driver to load */
 644                 nesdev->intf_int_req = NES_INTF_INT_PCIERR | NES_INTF_INT_CRITERR;
 645                 nesdev->int_req |= NES_INT_INTF;
 646         } else {
 647                 nesdev->intf_int_req = 0;
 648         }
 649         nesdev->intf_int_req |= (1 << (PCI_FUNC(nesdev->pcidev->devfn)+16));
 650         nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS0, 0);
 651         nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS1, 0);
 652         nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS2, 0x00001265);
 653         nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS4, 0x18021804);
 654
 655         nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS3, 0x17801790);
 656
 657         /* deal with both periodic and one_shot */
 658         nesdev->timer_int_req = 0x101 << PCI_FUNC(nesdev->pcidev->devfn);
 659         nesdev->nesadapter->timer_int_req |= nesdev->timer_int_req;
 660         nes_debug(NES_DBG_INIT, "setting int_req for function %u, nesdev = 0x%04X, adapter = 0x%04X\n",
 661                         PCI_FUNC(nesdev->pcidev->devfn),
 662                         nesdev->timer_int_req, nesdev->nesadapter->timer_int_req);
 663
 664         nes_write32(nesdev->regs+NES_INTF_INT_MASK, ~(nesdev->intf_int_req));
 665
 666         list_add_tail(&nesdev->list, &nes_dev_list);
 667
 668         /* Request an interrupt line for the driver */
 669         ret = request_irq(pcidev->irq, nes_interrupt, IRQF_SHARED, DRV_NAME, nesdev);
 670         if (ret) {
 671                 printk(KERN_ERR PFX "%s: requested IRQ %u is busy\n",
 672                                 pci_name(pcidev), pcidev->irq);
 673                 goto bail65;
 674         }
 675
 676         nes_write32(nesdev->regs+NES_INT_MASK, ~nesdev->int_req);
 677
 678         if (nes_notifiers_registered == 0) {
 679                 register_inetaddr_notifier(&nes_inetaddr_notifier);
 680                 register_netevent_notifier(&nes_net_notifier);
 681         }
 682         nes_notifiers_registered++;
 683
 684         if (ibnl_add_client(RDMA_NL_NES, RDMA_NL_IWPM_NUM_OPS, nes_nl_cb_table))
 685                 printk(KERN_ERR PFX "%s[%u]: Failed to add netlink callback\n",
 686                         __func__, __LINE__);
 687
 688         ret = iwpm_init(RDMA_NL_NES);
 689         if (ret) {
 690                 printk(KERN_ERR PFX "%s: port mapper initialization failed\n",
 691                                 pci_name(pcidev));
 692                 goto bail7;
 693         }
 694
 695         INIT_DELAYED_WORK(&nesdev->work, nes_recheck_link_status);
 696
 697         /* Initialize network devices */
 698         netdev = nes_netdev_init(nesdev, mmio_regs);
 699         if (netdev == NULL) {
 700                 ret = -ENOMEM;
 701                 goto bail7;
 702         }
 703
 704         /* Register network device */
 705         ret = register_netdev(netdev);
 706         if (ret) {
 707                 printk(KERN_ERR PFX "Unable to register netdev, ret = %d\n", ret);
 708                 nes_netdev_destroy(netdev);
 709                 goto bail7;
 710         }
 711
 712         nes_print_macaddr(netdev);
 713
 714         nesdev->netdev_count++;
 715         nesdev->nesadapter->netdev_count++;
 716
 717         printk(KERN_INFO PFX "%s: NetEffect RNIC driver successfully loaded.\n",
 718                         pci_name(pcidev));
 719         return 0;
 720
 721         bail7:
 722         printk(KERN_ERR PFX "bail7\n");
 723         while (nesdev->netdev_count > 0) {
 724                 nesdev->netdev_count--;
 725                 nesdev->nesadapter->netdev_count--;
 726
 727                 unregister_netdev(nesdev->netdev[nesdev->netdev_count]);
 728                 nes_netdev_destroy(nesdev->netdev[nesdev->netdev_count]);
 729         }
 730
 731         nes_debug(NES_DBG_INIT, "netdev_count=%d, nesadapter->netdev_count=%d\n",
 732                         nesdev->netdev_count, nesdev->nesadapter->netdev_count);
 733         ibnl_remove_client(RDMA_NL_NES);
 734
 735         nes_notifiers_registered--;
 736         if (nes_notifiers_registered == 0) {
 737                 unregister_netevent_notifier(&nes_net_notifier);
 738                 unregister_inetaddr_notifier(&nes_inetaddr_notifier);
 739         }
 740
 741         list_del(&nesdev->list);
 742         nes_destroy_cqp(nesdev);
 743
 744         bail65:
 745         printk(KERN_ERR PFX "bail65\n");
 746         free_irq(pcidev->irq, nesdev);
 747         if (nesdev->msi_enabled) {
 748                 pci_disable_msi(pcidev);
 749         }
 750         bail6:
 751         printk(KERN_ERR PFX "bail6\n");
 752         tasklet_kill(&nesdev->dpc_tasklet);
 753         /* Deallocate the Adapter Structure */
 754         nes_destroy_adapter(nesdev->nesadapter);
 755
 756         bail5:
 757         printk(KERN_ERR PFX "bail5\n");
 758         iounmap(nesdev->regs);
 759
 760         bail3:
 761         printk(KERN_ERR PFX "bail3\n");
 762         kfree(nesdev);
 763
 764         bail2:
 765         pci_release_regions(pcidev);
 766
 767         bail1:
 768         pci_disable_device(pcidev);
 769
 770         bail0:
 771         return ret;
 772 }
 773
 774
 775 /**
 776  * nes_remove - unload from kernel
 777  */
 778 static void nes_remove(struct pci_dev *pcidev)
 779 {
 780         struct nes_device *nesdev = pci_get_drvdata(pcidev);
 781         struct net_device *netdev;
 782         int netdev_index = 0;
 783         unsigned long flags;
 784
 785                 if (nesdev->netdev_count) {
 786                         netdev = nesdev->netdev[netdev_index];
 787                         if (netdev) {
 788                                 netif_stop_queue(netdev);
 789                                 unregister_netdev(netdev);
 790                                 nes_netdev_destroy(netdev);
 791
 792                                 nesdev->netdev[netdev_index] = NULL;
 793                                 nesdev->netdev_count--;
 794                                 nesdev->nesadapter->netdev_count--;
 795                         }
 796                 }
 797         ibnl_remove_client(RDMA_NL_NES);
 798         iwpm_exit(RDMA_NL_NES);
 799
 800         nes_notifiers_registered--;
 801         if (nes_notifiers_registered == 0) {
 802                 unregister_netevent_notifier(&nes_net_notifier);
 803                 unregister_inetaddr_notifier(&nes_inetaddr_notifier);
 804         }
 805
 806         list_del(&nesdev->list);
 807         nes_destroy_cqp(nesdev);
 808
 809         free_irq(pcidev->irq, nesdev);
 810         tasklet_kill(&nesdev->dpc_tasklet);
 811
 812         spin_lock_irqsave(&nesdev->nesadapter->phy_lock, flags);
 813         if (nesdev->link_recheck) {
 814                 spin_unlock_irqrestore(&nesdev->nesadapter->phy_lock, flags);
 815                 cancel_delayed_work_sync(&nesdev->work);
 816         } else {
 817                 spin_unlock_irqrestore(&nesdev->nesadapter->phy_lock, flags);
 818         }
 819
 820         /* Deallocate the Adapter Structure */
 821         nes_destroy_adapter(nesdev->nesadapter);
 822
 823         if (nesdev->msi_enabled) {
 824                 pci_disable_msi(pcidev);
 825         }
 826
 827         iounmap(nesdev->regs);
 828         kfree(nesdev);
 829
 830         /* nes_debug(NES_DBG_SHUTDOWN, "calling pci_release_regions.\n"); */
 831         pci_release_regions(pcidev);
 832         pci_disable_device(pcidev);
 833         pci_set_drvdata(pcidev, NULL);
 834 }
 835
 836
 837 static struct pci_driver nes_pci_driver = {
 838         .name = DRV_NAME,
 839         .id_table = nes_pci_table,
 840         .probe = nes_probe,
 841         .remove = nes_remove,
 842 };
 843
 844 static ssize_t nes_show_adapter(struct device_driver *ddp, char *buf)
 845 {
 846         unsigned int  devfn = 0xffffffff;
 847         unsigned char bus_number = 0xff;
 848         unsigned int  i = 0;
 849         struct nes_device *nesdev;
 850
 851         list_for_each_entry(nesdev, &nes_dev_list, list) {
 852                 if (i == ee_flsh_adapter) {
 853                         devfn = nesdev->pcidev->devfn;
 854                         bus_number = nesdev->pcidev->bus->number;
 855                         break;
 856                 }
 857                 i++;
 858         }
 859
 860         return snprintf(buf, PAGE_SIZE, "%x:%x\n", bus_number, devfn);
 861 }
 862
 863 static ssize_t nes_store_adapter(struct device_driver *ddp,
 864         const char *buf, size_t count)
 865 {
 866         char *p = (char *)buf;
 867
 868         ee_flsh_adapter = simple_strtoul(p, &p, 10);
 869         return strnlen(buf, count);
 870 }
 871
 872 static ssize_t nes_show_ee_cmd(struct device_driver *ddp, char *buf)
 873 {
 874         u32 eeprom_cmd = 0xdead;
 875         u32 i = 0;
 876         struct nes_device *nesdev;
 877
 878         list_for_each_entry(nesdev, &nes_dev_list, list) {
 879                 if (i == ee_flsh_adapter) {
 880                         eeprom_cmd = nes_read32(nesdev->regs + NES_EEPROM_COMMAND);
 881                         break;
 882                 }
 883                 i++;
 884         }
 885         return snprintf(buf, PAGE_SIZE, "0x%x\n", eeprom_cmd);
 886 }
 887
 888 static ssize_t nes_store_ee_cmd(struct device_driver *ddp,
 889         const char *buf, size_t count)
 890 {
 891         char *p = (char *)buf;
 892         u32 val;
 893         u32 i = 0;
 894         struct nes_device *nesdev;
 895
 896         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
 897                 val = simple_strtoul(p, &p, 16);
 898                 list_for_each_entry(nesdev, &nes_dev_list, list) {
 899                         if (i == ee_flsh_adapter) {
 900                                 nes_write32(nesdev->regs + NES_EEPROM_COMMAND, val);
 901                                 break;
 902                         }
 903                         i++;
 904                 }
 905         }
 906         return strnlen(buf, count);
 907 }
 908
 909 static ssize_t nes_show_ee_data(struct device_driver *ddp, char *buf)
 910 {
 911         u32 eeprom_data = 0xdead;
 912         u32 i = 0;
 913         struct nes_device *nesdev;
 914
 915         list_for_each_entry(nesdev, &nes_dev_list, list) {
 916                 if (i == ee_flsh_adapter) {
 917                         eeprom_data = nes_read32(nesdev->regs + NES_EEPROM_DATA);
 918                         break;
 919                 }
 920                 i++;
 921         }
 922
 923         return  snprintf(buf, PAGE_SIZE, "0x%x\n", eeprom_data);
 924 }
 925
 926 static ssize_t nes_store_ee_data(struct device_driver *ddp,
 927         const char *buf, size_t count)
 928 {
 929         char *p = (char *)buf;
 930         u32 val;
 931         u32 i = 0;
 932         struct nes_device *nesdev;
 933
 934         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
 935                 val = simple_strtoul(p, &p, 16);
 936                 list_for_each_entry(nesdev, &nes_dev_list, list) {
 937                         if (i == ee_flsh_adapter) {
 938                                 nes_write32(nesdev->regs + NES_EEPROM_DATA, val);
 939                                 break;
 940                         }
 941                         i++;
 942                 }
 943         }
 944         return strnlen(buf, count);
 945 }
 946
 947 static ssize_t nes_show_flash_cmd(struct device_driver *ddp, char *buf)
 948 {
 949         u32 flash_cmd = 0xdead;
 950         u32 i = 0;
 951         struct nes_device *nesdev;
 952
 953         list_for_each_entry(nesdev, &nes_dev_list, list) {
 954                 if (i == ee_flsh_adapter) {
 955                         flash_cmd = nes_read32(nesdev->regs + NES_FLASH_COMMAND);
 956                         break;
 957                 }
 958                 i++;
 959         }
 960
 961         return  snprintf(buf, PAGE_SIZE, "0x%x\n", flash_cmd);
 962 }
 963
 964 static ssize_t nes_store_flash_cmd(struct device_driver *ddp,
 965         const char *buf, size_t count)
 966 {
 967         char *p = (char *)buf;
 968         u32 val;
 969         u32 i = 0;
 970         struct nes_device *nesdev;
 971
 972         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
 973                 val = simple_strtoul(p, &p, 16);
 974                 list_for_each_entry(nesdev, &nes_dev_list, list) {
 975                         if (i == ee_flsh_adapter) {
 976                                 nes_write32(nesdev->regs + NES_FLASH_COMMAND, val);
 977                                 break;
 978                         }
 979                         i++;
 980                 }
 981         }
 982         return strnlen(buf, count);
 983 }
 984
 985 static ssize_t nes_show_flash_data(struct device_driver *ddp, char *buf)
 986 {
 987         u32 flash_data = 0xdead;
 988         u32 i = 0;
 989         struct nes_device *nesdev;
 990
 991         list_for_each_entry(nesdev, &nes_dev_list, list) {
 992                 if (i == ee_flsh_adapter) {
 993                         flash_data = nes_read32(nesdev->regs + NES_FLASH_DATA);
 994                         break;
 995                 }
 996                 i++;
 997         }
 998
 999         return  snprintf(buf, PAGE_SIZE, "0x%x\n", flash_data);
1000 }
1001
1002 static ssize_t nes_store_flash_data(struct device_driver *ddp,
1003         const char *buf, size_t count)
1004 {
1005         char *p = (char *)buf;
1006         u32 val;
1007         u32 i = 0;
1008         struct nes_device *nesdev;
1009
1010         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
1011                 val = simple_strtoul(p, &p, 16);
1012                 list_for_each_entry(nesdev, &nes_dev_list, list) {
1013                         if (i == ee_flsh_adapter) {
1014                                 nes_write32(nesdev->regs + NES_FLASH_DATA, val);
1015                                 break;
1016                         }
1017                         i++;
1018                 }
1019         }
1020         return strnlen(buf, count);
1021 }
1022
1023 static ssize_t nes_show_nonidx_addr(struct device_driver *ddp, char *buf)
1024 {
1025         return  snprintf(buf, PAGE_SIZE, "0x%x\n", sysfs_nonidx_addr);
1026 }
1027
1028 static ssize_t nes_store_nonidx_addr(struct device_driver *ddp,
1029         const char *buf, size_t count)
1030 {
1031         char *p = (char *)buf;
1032
1033         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X')
1034                 sysfs_nonidx_addr = simple_strtoul(p, &p, 16);
1035
1036         return strnlen(buf, count);
1037 }
1038
1039 static ssize_t nes_show_nonidx_data(struct device_driver *ddp, char *buf)
1040 {
1041         u32 nonidx_data = 0xdead;
1042         u32 i = 0;
1043         struct nes_device *nesdev;
1044
1045         list_for_each_entry(nesdev, &nes_dev_list, list) {
1046                 if (i == ee_flsh_adapter) {
1047                         nonidx_data = nes_read32(nesdev->regs + sysfs_nonidx_addr);
1048                         break;
1049                 }
1050                 i++;
1051         }
1052
1053         return  snprintf(buf, PAGE_SIZE, "0x%x\n", nonidx_data);
1054 }
1055
1056 static ssize_t nes_store_nonidx_data(struct device_driver *ddp,
1057         const char *buf, size_t count)
1058 {
1059         char *p = (char *)buf;
1060         u32 val;
1061         u32 i = 0;
1062         struct nes_device *nesdev;
1063
1064         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
1065                 val = simple_strtoul(p, &p, 16);
1066                 list_for_each_entry(nesdev, &nes_dev_list, list) {
1067                         if (i == ee_flsh_adapter) {
1068                                 nes_write32(nesdev->regs + sysfs_nonidx_addr, val);
1069                                 break;
1070                         }
1071                         i++;
1072                 }
1073         }
1074         return strnlen(buf, count);
1075 }
1076
1077 static ssize_t nes_show_idx_addr(struct device_driver *ddp, char *buf)
1078 {
1079         return  snprintf(buf, PAGE_SIZE, "0x%x\n", sysfs_idx_addr);
1080 }
1081
1082 static ssize_t nes_store_idx_addr(struct device_driver *ddp,
1083         const char *buf, size_t count)
1084 {
1085         char *p = (char *)buf;
1086
1087         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X')
1088                 sysfs_idx_addr = simple_strtoul(p, &p, 16);
1089
1090         return strnlen(buf, count);
1091 }
1092
1093 static ssize_t nes_show_idx_data(struct device_driver *ddp, char *buf)
1094 {
1095         u32 idx_data = 0xdead;
1096         u32 i = 0;
1097         struct nes_device *nesdev;
1098
1099         list_for_each_entry(nesdev, &nes_dev_list, list) {
1100                 if (i == ee_flsh_adapter) {
1101                         idx_data = nes_read_indexed(nesdev, sysfs_idx_addr);
1102                         break;
1103                 }
1104                 i++;
1105         }
1106
1107         return  snprintf(buf, PAGE_SIZE, "0x%x\n", idx_data);
1108 }
1109
1110 static ssize_t nes_store_idx_data(struct device_driver *ddp,
1111         const char *buf, size_t count)
1112 {
1113         char *p = (char *)buf;
1114         u32 val;
1115         u32 i = 0;
1116         struct nes_device *nesdev;
1117
1118         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
1119                 val = simple_strtoul(p, &p, 16);
1120                 list_for_each_entry(nesdev, &nes_dev_list, list) {
1121                         if (i == ee_flsh_adapter) {
1122                                 nes_write_indexed(nesdev, sysfs_idx_addr, val);
1123                                 break;
1124                         }
1125                         i++;
1126                 }
1127         }
1128         return strnlen(buf, count);
1129 }
1130
1131
1132 /**
1133  * nes_show_wqm_quanta
1134  */
1135 static ssize_t nes_show_wqm_quanta(struct device_driver *ddp, char *buf)
1136 {
1137         u32 wqm_quanta_value = 0xdead;
1138         u32 i = 0;
1139         struct nes_device *nesdev;
1140
1141         list_for_each_entry(nesdev, &nes_dev_list, list) {
1142                 if (i == ee_flsh_adapter) {
1143                         wqm_quanta_value = nesdev->nesadapter->wqm_quanta;
1144                         break;
1145                 }
1146                 i++;
1147         }
1148
1149         return  snprintf(buf, PAGE_SIZE, "0x%X\n", wqm_quanta_value);
1150 }
1151
1152
1153 /**
1154  * nes_store_wqm_quanta
1155  */
1156 static ssize_t nes_store_wqm_quanta(struct device_driver *ddp,
1157                                         const char *buf, size_t count)
1158 {
1159         unsigned long wqm_quanta_value;
1160         u32 wqm_config1;
1161         u32 i = 0;
1162         struct nes_device *nesdev;
1163
1164         if (kstrtoul(buf, 0, &wqm_quanta_value) < 0)
1165                 return -EINVAL;
1166
1167         list_for_each_entry(nesdev, &nes_dev_list, list) {
1168                 if (i == ee_flsh_adapter) {
1169                         nesdev->nesadapter->wqm_quanta = wqm_quanta_value;
1170                         wqm_config1 = nes_read_indexed(nesdev,
1171                                                 NES_IDX_WQM_CONFIG1);
1172                         nes_write_indexed(nesdev, NES_IDX_WQM_CONFIG1,
1173                                         ((wqm_quanta_value << 1) |
1174                                         (wqm_config1 & 0x00000001)));
1175                         break;
1176                 }
1177                 i++;
1178         }
1179         return strnlen(buf, count);
1180 }
1181
1182 static DRIVER_ATTR(adapter, S_IRUSR | S_IWUSR,
1183                    nes_show_adapter, nes_store_adapter);
1184 static DRIVER_ATTR(eeprom_cmd, S_IRUSR | S_IWUSR,
1185                    nes_show_ee_cmd, nes_store_ee_cmd);
1186 static DRIVER_ATTR(eeprom_data, S_IRUSR | S_IWUSR,
1187                    nes_show_ee_data, nes_store_ee_data);
1188 static DRIVER_ATTR(flash_cmd, S_IRUSR | S_IWUSR,
1189                    nes_show_flash_cmd, nes_store_flash_cmd);
1190 static DRIVER_ATTR(flash_data, S_IRUSR | S_IWUSR,
1191                    nes_show_flash_data, nes_store_flash_data);
1192 static DRIVER_ATTR(nonidx_addr, S_IRUSR | S_IWUSR,
1193                    nes_show_nonidx_addr, nes_store_nonidx_addr);
1194 static DRIVER_ATTR(nonidx_data, S_IRUSR | S_IWUSR,
1195                    nes_show_nonidx_data, nes_store_nonidx_data);
1196 static DRIVER_ATTR(idx_addr, S_IRUSR | S_IWUSR,
1197                    nes_show_idx_addr, nes_store_idx_addr);
1198 static DRIVER_ATTR(idx_data, S_IRUSR | S_IWUSR,
1199                    nes_show_idx_data, nes_store_idx_data);
1200 static DRIVER_ATTR(wqm_quanta, S_IRUSR | S_IWUSR,
1201                    nes_show_wqm_quanta, nes_store_wqm_quanta);
1202
1203 static int nes_create_driver_sysfs(struct pci_driver *drv)
1204 {
1205         int error;
1206         error  = driver_create_file(&drv->driver, &driver_attr_adapter);
1207         error |= driver_create_file(&drv->driver, &driver_attr_eeprom_cmd);
1208         error |= driver_create_file(&drv->driver, &driver_attr_eeprom_data);
1209         error |= driver_create_file(&drv->driver, &driver_attr_flash_cmd);
1210         error |= driver_create_file(&drv->driver, &driver_attr_flash_data);
1211         error |= driver_create_file(&drv->driver, &driver_attr_nonidx_addr);
1212         error |= driver_create_file(&drv->driver, &driver_attr_nonidx_data);
1213         error |= driver_create_file(&drv->driver, &driver_attr_idx_addr);
1214         error |= driver_create_file(&drv->driver, &driver_attr_idx_data);
1215         error |= driver_create_file(&drv->driver, &driver_attr_wqm_quanta);
1216         return error;
1217 }
1218
1219 static void nes_remove_driver_sysfs(struct pci_driver *drv)
1220 {
1221         driver_remove_file(&drv->driver, &driver_attr_adapter);
1222         driver_remove_file(&drv->driver, &driver_attr_eeprom_cmd);
1223         driver_remove_file(&drv->driver, &driver_attr_eeprom_data);
1224         driver_remove_file(&drv->driver, &driver_attr_flash_cmd);
1225         driver_remove_file(&drv->driver, &driver_attr_flash_data);
1226         driver_remove_file(&drv->driver, &driver_attr_nonidx_addr);
1227         driver_remove_file(&drv->driver, &driver_attr_nonidx_data);
1228         driver_remove_file(&drv->driver, &driver_attr_idx_addr);
1229         driver_remove_file(&drv->driver, &driver_attr_idx_data);
1230         driver_remove_file(&drv->driver, &driver_attr_wqm_quanta);
1231 }
1232
1233 /**
1234  * nes_init_module - module initialization entry point
1235  */
1236 static int __init nes_init_module(void)
1237 {
1238         int retval;
1239         int retval1;
1240
1241         retval = nes_cm_start();
1242         if (retval) {
1243                 printk(KERN_ERR PFX "Unable to start NetEffect iWARP CM.\n");
1244                 return retval;
1245         }
1246         retval = pci_register_driver(&nes_pci_driver);
1247         if (retval >= 0) {
1248                 retval1 = nes_create_driver_sysfs(&nes_pci_driver);
1249                 if (retval1 < 0)
1250                         printk(KERN_ERR PFX "Unable to create NetEffect sys files.\n");
1251         }
1252         return retval;
1253 }
1254
1255
1256 /**
1257  * nes_exit_module - module unload entry point
1258  */
1259 static void __exit nes_exit_module(void)
1260 {
1261         nes_cm_stop();
1262         nes_remove_driver_sysfs(&nes_pci_driver);
1263
1264         pci_unregister_driver(&nes_pci_driver);
1265 }
1266
1267
1268 module_init(nes_init_module);
1269 module_exit(nes_exit_module);