err.no Git - linux-2.6/blob - drivers/infiniband/hw/nes/nes.c

   1 /*
   2  * Copyright (c) 2006 - 2008 NetEffect, Inc. 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 <asm/io.h>
  48 #include <asm/irq.h>
  49 #include <asm/byteorder.h>
  50 #include <rdma/ib_smi.h>
  51 #include <rdma/ib_verbs.h>
  52 #include <rdma/ib_pack.h>
  53 #include <rdma/iw_cm.h>
  54
  55 #include "nes.h"
  56
  57 #include <net/netevent.h>
  58 #include <net/neighbour.h>
  59 #include <linux/route.h>
  60 #include <net/ip_fib.h>
  61
  62 MODULE_AUTHOR("NetEffect");
  63 MODULE_DESCRIPTION("NetEffect RNIC Low-level iWARP Driver");
  64 MODULE_LICENSE("Dual BSD/GPL");
  65 MODULE_VERSION(DRV_VERSION);
  66
  67 int max_mtu = 9000;
  68 int interrupt_mod_interval = 0;
  69
  70
  71 /* Interoperability */
  72 int mpa_version = 1;
  73 module_param(mpa_version, int, 0);
  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, 0);
  79 MODULE_PARM_DESC(disable_mpa_crc, "Disable checking of MPA CRC");
  80
  81 unsigned int send_first = 0;
  82 module_param(send_first, int, 0);
  83 MODULE_PARM_DESC(send_first, "Send RDMA Message First on Active Connection");
  84
  85
  86 unsigned int nes_drv_opt = 0;
  87 module_param(nes_drv_opt, int, 0);
  88 MODULE_PARM_DESC(nes_drv_opt, "Driver option parameters");
  89
  90 unsigned int nes_debug_level = 0;
  91 module_param_named(debug_level, nes_debug_level, uint, 0644);
  92 MODULE_PARM_DESC(debug_level, "Enable debug output level");
  93
  94 unsigned int nes_lro_max_aggr = NES_LRO_MAX_AGGR;
  95 module_param(nes_lro_max_aggr, int, NES_LRO_MAX_AGGR);
  96 MODULE_PARM_DESC(nes_mro_max_aggr, " nic LRO MAX packet aggregation");
  97
  98 LIST_HEAD(nes_adapter_list);
  99 static LIST_HEAD(nes_dev_list);
 100
 101 atomic_t qps_destroyed;
 102
 103 static unsigned int ee_flsh_adapter;
 104 static unsigned int sysfs_nonidx_addr;
 105 static unsigned int sysfs_idx_addr;
 106
 107 static struct pci_device_id nes_pci_table[] = {
 108         {PCI_VENDOR_ID_NETEFFECT, PCI_DEVICE_ID_NETEFFECT_NE020, PCI_ANY_ID, PCI_ANY_ID},
 109         {0}
 110 };
 111
 112 MODULE_DEVICE_TABLE(pci, nes_pci_table);
 113
 114 static int nes_inetaddr_event(struct notifier_block *, unsigned long, void *);
 115 static int nes_net_event(struct notifier_block *, unsigned long, void *);
 116 static int nes_notifiers_registered;
 117
 118
 119 static struct notifier_block nes_inetaddr_notifier = {
 120         .notifier_call = nes_inetaddr_event
 121 };
 122
 123 static struct notifier_block nes_net_notifier = {
 124         .notifier_call = nes_net_event
 125 };
 126
 127
 128
 129
 130 /**
 131  * nes_inetaddr_event
 132  */
 133 static int nes_inetaddr_event(struct notifier_block *notifier,
 134                 unsigned long event, void *ptr)
 135 {
 136         struct in_ifaddr *ifa = ptr;
 137         struct net_device *event_netdev = ifa->ifa_dev->dev;
 138         struct nes_device *nesdev;
 139         struct net_device *netdev;
 140         struct nes_vnic *nesvnic;
 141         unsigned int addr;
 142         unsigned int mask;
 143
 144         addr = ntohl(ifa->ifa_address);
 145         mask = ntohl(ifa->ifa_mask);
 146         nes_debug(NES_DBG_NETDEV, "nes_inetaddr_event: ip address " NIPQUAD_FMT
 147                   ", netmask " NIPQUAD_FMT ".\n",
 148                   HIPQUAD(addr), HIPQUAD(mask));
 149         list_for_each_entry(nesdev, &nes_dev_list, list) {
 150                 nes_debug(NES_DBG_NETDEV, "Nesdev list entry = 0x%p. (%s)\n",
 151                                 nesdev, nesdev->netdev[0]->name);
 152                 netdev = nesdev->netdev[0];
 153                 nesvnic = netdev_priv(netdev);
 154                 if (netdev == event_netdev) {
 155                         if (nesvnic->rdma_enabled == 0) {
 156                                 nes_debug(NES_DBG_NETDEV, "Returning without processing event for %s since"
 157                                                 " RDMA is not enabled.\n",
 158                                                 netdev->name);
 159                                 return NOTIFY_OK;
 160                         }
 161                         /* we have ifa->ifa_address/mask here if we need it */
 162                         switch (event) {
 163                                 case NETDEV_DOWN:
 164                                         nes_debug(NES_DBG_NETDEV, "event:DOWN\n");
 165                                         nes_write_indexed(nesdev,
 166                                                         NES_IDX_DST_IP_ADDR+(0x10*PCI_FUNC(nesdev->pcidev->devfn)), 0);
 167
 168                                         nes_manage_arp_cache(netdev, netdev->dev_addr,
 169                                                         ntohl(nesvnic->local_ipaddr), NES_ARP_DELETE);
 170                                         nesvnic->local_ipaddr = 0;
 171                                         return NOTIFY_OK;
 172                                         break;
 173                                 case NETDEV_UP:
 174                                         nes_debug(NES_DBG_NETDEV, "event:UP\n");
 175
 176                                         if (nesvnic->local_ipaddr != 0) {
 177                                                 nes_debug(NES_DBG_NETDEV, "Interface already has local_ipaddr\n");
 178                                                 return NOTIFY_OK;
 179                                         }
 180                                         /* Add the address to the IP table */
 181                                         nesvnic->local_ipaddr = ifa->ifa_address;
 182
 183                                         nes_write_indexed(nesdev,
 184                                                         NES_IDX_DST_IP_ADDR+(0x10*PCI_FUNC(nesdev->pcidev->devfn)),
 185                                                         ntohl(ifa->ifa_address));
 186                                         nes_manage_arp_cache(netdev, netdev->dev_addr,
 187                                                         ntohl(nesvnic->local_ipaddr), NES_ARP_ADD);
 188                                         return NOTIFY_OK;
 189                                         break;
 190                                 default:
 191                                         break;
 192                         }
 193                 }
 194         }
 195
 196         return NOTIFY_DONE;
 197 }
 198
 199
 200 /**
 201  * nes_net_event
 202  */
 203 static int nes_net_event(struct notifier_block *notifier,
 204                 unsigned long event, void *ptr)
 205 {
 206         struct neighbour *neigh = ptr;
 207         struct nes_device *nesdev;
 208         struct net_device *netdev;
 209         struct nes_vnic *nesvnic;
 210
 211         switch (event) {
 212                 case NETEVENT_NEIGH_UPDATE:
 213                         list_for_each_entry(nesdev, &nes_dev_list, list) {
 214                                 /* nes_debug(NES_DBG_NETDEV, "Nesdev list entry = 0x%p.\n", nesdev); */
 215                                 netdev = nesdev->netdev[0];
 216                                 nesvnic = netdev_priv(netdev);
 217                                 if (netdev == neigh->dev) {
 218                                         if (nesvnic->rdma_enabled == 0) {
 219                                                 nes_debug(NES_DBG_NETDEV, "Skipping device %s since no RDMA\n",
 220                                                                 netdev->name);
 221                                         } else {
 222                                                 if (neigh->nud_state & NUD_VALID) {
 223                                                         nes_manage_arp_cache(neigh->dev, neigh->ha,
 224                                                                         ntohl(*(__be32 *)neigh->primary_key), NES_ARP_ADD);
 225                                                 } else {
 226                                                         nes_manage_arp_cache(neigh->dev, neigh->ha,
 227                                                                         ntohl(*(__be32 *)neigh->primary_key), NES_ARP_DELETE);
 228                                                 }
 229                                         }
 230                                         return NOTIFY_OK;
 231                                 }
 232                         }
 233                         break;
 234                 default:
 235                         nes_debug(NES_DBG_NETDEV, "NETEVENT_ %lu undefined\n", event);
 236                         break;
 237         }
 238
 239         return NOTIFY_DONE;
 240 }
 241
 242
 243 /**
 244  * nes_add_ref
 245  */
 246 void nes_add_ref(struct ib_qp *ibqp)
 247 {
 248         struct nes_qp *nesqp;
 249
 250         nesqp = to_nesqp(ibqp);
 251         nes_debug(NES_DBG_QP, "Bumping refcount for QP%u.  Pre-inc value = %u\n",
 252                         ibqp->qp_num, atomic_read(&nesqp->refcount));
 253         atomic_inc(&nesqp->refcount);
 254 }
 255
 256 static void nes_cqp_rem_ref_callback(struct nes_device *nesdev, struct nes_cqp_request *cqp_request)
 257 {
 258         unsigned long flags;
 259         struct nes_qp *nesqp = cqp_request->cqp_callback_pointer;
 260         struct nes_adapter *nesadapter = nesdev->nesadapter;
 261         u32 qp_id;
 262
 263         atomic_inc(&qps_destroyed);
 264
 265         /* Free the control structures */
 266
 267         qp_id = nesqp->hwqp.qp_id;
 268         if (nesqp->pbl_vbase) {
 269                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
 270                                 nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
 271                 spin_lock_irqsave(&nesadapter->pbl_lock, flags);
 272                 nesadapter->free_256pbl++;
 273                 spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
 274                 pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
 275                 nesqp->pbl_vbase = NULL;
 276
 277         } else {
 278                 pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
 279                                 nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
 280         }
 281         nes_free_resource(nesadapter, nesadapter->allocated_qps, nesqp->hwqp.qp_id);
 282
 283         kfree(nesqp->allocated_buffer);
 284
 285 }
 286
 287 /**
 288  * nes_rem_ref
 289  */
 290 void nes_rem_ref(struct ib_qp *ibqp)
 291 {
 292         u64 u64temp;
 293         struct nes_qp *nesqp;
 294         struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
 295         struct nes_device *nesdev = nesvnic->nesdev;
 296         struct nes_adapter *nesadapter = nesdev->nesadapter;
 297         struct nes_hw_cqp_wqe *cqp_wqe;
 298         struct nes_cqp_request *cqp_request;
 299         u32 opcode;
 300
 301         nesqp = to_nesqp(ibqp);
 302
 303         if (atomic_read(&nesqp->refcount) == 0) {
 304                 printk(KERN_INFO PFX "%s: Reference count already 0 for QP%d, last aeq = 0x%04X.\n",
 305                                 __func__, ibqp->qp_num, nesqp->last_aeq);
 306                 BUG();
 307         }
 308
 309         if (atomic_dec_and_test(&nesqp->refcount)) {
 310                 nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = NULL;
 311
 312                 /* Destroy the QP */
 313                 cqp_request = nes_get_cqp_request(nesdev);
 314                 if (cqp_request == NULL) {
 315                         nes_debug(NES_DBG_QP, "Failed to get a cqp_request.\n");
 316                         return;
 317                 }
 318                 cqp_request->waiting = 0;
 319                 cqp_request->callback = 1;
 320                 cqp_request->cqp_callback = nes_cqp_rem_ref_callback;
 321                 cqp_request->cqp_callback_pointer = nesqp;
 322                 cqp_wqe = &cqp_request->cqp_wqe;
 323
 324                 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
 325                 opcode = NES_CQP_DESTROY_QP | NES_CQP_QP_TYPE_IWARP;
 326
 327                 if (nesqp->hte_added) {
 328                         opcode  |= NES_CQP_QP_DEL_HTE;
 329                         nesqp->hte_added = 0;
 330                 }
 331                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
 332                 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
 333                 u64temp = (u64)nesqp->nesqp_context_pbase;
 334                 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
 335                 nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
 336         }
 337 }
 338
 339
 340 /**
 341  * nes_get_qp
 342  */
 343 struct ib_qp *nes_get_qp(struct ib_device *device, int qpn)
 344 {
 345         struct nes_vnic *nesvnic = to_nesvnic(device);
 346         struct nes_device *nesdev = nesvnic->nesdev;
 347         struct nes_adapter *nesadapter = nesdev->nesadapter;
 348
 349         if ((qpn < NES_FIRST_QPN) || (qpn >= (NES_FIRST_QPN + nesadapter->max_qp)))
 350                 return NULL;
 351
 352         return &nesadapter->qp_table[qpn - NES_FIRST_QPN]->ibqp;
 353 }
 354
 355
 356 /**
 357  * nes_print_macaddr
 358  */
 359 static void nes_print_macaddr(struct net_device *netdev)
 360 {
 361         DECLARE_MAC_BUF(mac);
 362
 363         nes_debug(NES_DBG_INIT, "%s: %s, IRQ %u\n",
 364                   netdev->name, print_mac(mac, netdev->dev_addr), netdev->irq);
 365 }
 366
 367 /**
 368  * nes_interrupt - handle interrupts
 369  */
 370 static irqreturn_t nes_interrupt(int irq, void *dev_id)
 371 {
 372         struct nes_device *nesdev = (struct nes_device *)dev_id;
 373         int handled = 0;
 374         u32 int_mask;
 375         u32 int_req;
 376         u32 int_stat;
 377         u32 intf_int_stat;
 378         u32 timer_stat;
 379
 380         if (nesdev->msi_enabled) {
 381                 /* No need to read the interrupt pending register if msi is enabled */
 382                 handled = 1;
 383         } else {
 384                 if (unlikely(nesdev->nesadapter->hw_rev == NE020_REV)) {
 385                         /* Master interrupt enable provides synchronization for kicking off bottom half
 386                           when interrupt sharing is going on */
 387                         int_mask = nes_read32(nesdev->regs + NES_INT_MASK);
 388                         if (int_mask & 0x80000000) {
 389                                 /* Check interrupt status to see if this might be ours */
 390                                 int_stat = nes_read32(nesdev->regs + NES_INT_STAT);
 391                                 int_req = nesdev->int_req;
 392                                 if (int_stat&int_req) {
 393                                         /* if interesting CEQ or AEQ is pending, claim the interrupt */
 394                                         if ((int_stat&int_req) & (~(NES_INT_TIMER|NES_INT_INTF))) {
 395                                                 handled = 1;
 396                                         } else {
 397                                                 if (((int_stat & int_req) & NES_INT_TIMER) == NES_INT_TIMER) {
 398                                                         /* Timer might be running but might be for another function */
 399                                                         timer_stat = nes_read32(nesdev->regs + NES_TIMER_STAT);
 400                                                         if ((timer_stat & nesdev->timer_int_req) != 0) {
 401                                                                 handled = 1;
 402                                                         }
 403                                                 }
 404                                                 if ((((int_stat & int_req) & NES_INT_INTF) == NES_INT_INTF) &&
 405                                                                 (handled == 0)) {
 406                                                         intf_int_stat = nes_read32(nesdev->regs+NES_INTF_INT_STAT);
 407                                                         if ((intf_int_stat & nesdev->intf_int_req) != 0) {
 408                                                                 handled = 1;
 409                                                         }
 410                                                 }
 411                                         }
 412                                         if (handled) {
 413                                                 nes_write32(nesdev->regs+NES_INT_MASK, int_mask & (~0x80000000));
 414                                                 int_mask = nes_read32(nesdev->regs+NES_INT_MASK);
 415                                                 /* Save off the status to save an additional read */
 416                                                 nesdev->int_stat = int_stat;
 417                                                 nesdev->napi_isr_ran = 1;
 418                                         }
 419                                 }
 420                         }
 421                 } else {
 422                         handled = nes_read32(nesdev->regs+NES_INT_PENDING);
 423                 }
 424         }
 425
 426         if (handled) {
 427
 428                 if (nes_napi_isr(nesdev) == 0) {
 429                         tasklet_schedule(&nesdev->dpc_tasklet);
 430
 431                 }
 432                 return IRQ_HANDLED;
 433         } else {
 434                 return IRQ_NONE;
 435         }
 436 }
 437
 438
 439 /**
 440  * nes_probe - Device initialization
 441  */
 442 static int __devinit nes_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
 443 {
 444         struct net_device *netdev = NULL;
 445         struct nes_device *nesdev = NULL;
 446         int ret = 0;
 447         struct nes_vnic *nesvnic = NULL;
 448         void __iomem *mmio_regs = NULL;
 449         u8 hw_rev;
 450
 451         assert(pcidev != NULL);
 452         assert(ent != NULL);
 453
 454         printk(KERN_INFO PFX "NetEffect RNIC driver v%s loading. (%s)\n",
 455                         DRV_VERSION, pci_name(pcidev));
 456
 457         ret = pci_enable_device(pcidev);
 458         if (ret) {
 459                 printk(KERN_ERR PFX "Unable to enable PCI device. (%s)\n", pci_name(pcidev));
 460                 goto bail0;
 461         }
 462
 463         nes_debug(NES_DBG_INIT, "BAR0 (@0x%08lX) size = 0x%lX bytes\n",
 464                         (long unsigned int)pci_resource_start(pcidev, BAR_0),
 465                         (long unsigned int)pci_resource_len(pcidev, BAR_0));
 466         nes_debug(NES_DBG_INIT, "BAR1 (@0x%08lX) size = 0x%lX bytes\n",
 467                         (long unsigned int)pci_resource_start(pcidev, BAR_1),
 468                         (long unsigned int)pci_resource_len(pcidev, BAR_1));
 469
 470         /* Make sure PCI base addr are MMIO */
 471         if (!(pci_resource_flags(pcidev, BAR_0) & IORESOURCE_MEM) ||
 472                         !(pci_resource_flags(pcidev, BAR_1) & IORESOURCE_MEM)) {
 473                 printk(KERN_ERR PFX "PCI regions not an MMIO resource\n");
 474                 ret = -ENODEV;
 475                 goto bail1;
 476         }
 477
 478         /* Reserve PCI I/O and memory resources */
 479         ret = pci_request_regions(pcidev, DRV_NAME);
 480         if (ret) {
 481                 printk(KERN_ERR PFX "Unable to request regions. (%s)\n", pci_name(pcidev));
 482                 goto bail1;
 483         }
 484
 485         if ((sizeof(dma_addr_t) > 4)) {
 486                 ret = pci_set_dma_mask(pcidev, DMA_64BIT_MASK);
 487                 if (ret < 0) {
 488                         printk(KERN_ERR PFX "64b DMA mask configuration failed\n");
 489                         goto bail2;
 490                 }
 491                 ret = pci_set_consistent_dma_mask(pcidev, DMA_64BIT_MASK);
 492                 if (ret) {
 493                         printk(KERN_ERR PFX "64b DMA consistent mask configuration failed\n");
 494                         goto bail2;
 495                 }
 496         } else {
 497                 ret = pci_set_dma_mask(pcidev, DMA_32BIT_MASK);
 498                 if (ret < 0) {
 499                         printk(KERN_ERR PFX "32b DMA mask configuration failed\n");
 500                         goto bail2;
 501                 }
 502                 ret = pci_set_consistent_dma_mask(pcidev, DMA_32BIT_MASK);
 503                 if (ret) {
 504                         printk(KERN_ERR PFX "32b DMA consistent mask configuration failed\n");
 505                         goto bail2;
 506                 }
 507         }
 508
 509         pci_set_master(pcidev);
 510
 511         /* Allocate hardware structure */
 512         nesdev = kzalloc(sizeof(struct nes_device), GFP_KERNEL);
 513         if (!nesdev) {
 514                 printk(KERN_ERR PFX "%s: Unable to alloc hardware struct\n", pci_name(pcidev));
 515                 ret = -ENOMEM;
 516                 goto bail2;
 517         }
 518
 519         nes_debug(NES_DBG_INIT, "Allocated nes device at %p\n", nesdev);
 520         nesdev->pcidev = pcidev;
 521         pci_set_drvdata(pcidev, nesdev);
 522
 523         pci_read_config_byte(pcidev, 0x0008, &hw_rev);
 524         nes_debug(NES_DBG_INIT, "hw_rev=%u\n", hw_rev);
 525
 526         spin_lock_init(&nesdev->indexed_regs_lock);
 527
 528         /* Remap the PCI registers in adapter BAR0 to kernel VA space */
 529         mmio_regs = ioremap_nocache(pci_resource_start(pcidev, BAR_0), sizeof(mmio_regs));
 530         if (mmio_regs == NULL) {
 531                 printk(KERN_ERR PFX "Unable to remap BAR0\n");
 532                 ret = -EIO;
 533                 goto bail3;
 534         }
 535         nesdev->regs = mmio_regs;
 536         nesdev->index_reg = 0x50 + (PCI_FUNC(pcidev->devfn)*8) + mmio_regs;
 537
 538         /* Ensure interrupts are disabled */
 539         nes_write32(nesdev->regs+NES_INT_MASK, 0x7fffffff);
 540
 541         if (nes_drv_opt & NES_DRV_OPT_ENABLE_MSI) {
 542                 if (!pci_enable_msi(nesdev->pcidev)) {
 543                         nesdev->msi_enabled = 1;
 544                         nes_debug(NES_DBG_INIT, "MSI is enabled for device %s\n",
 545                                         pci_name(pcidev));
 546                 } else {
 547                         nes_debug(NES_DBG_INIT, "MSI is disabled by linux for device %s\n",
 548                                         pci_name(pcidev));
 549                 }
 550         } else {
 551                 nes_debug(NES_DBG_INIT, "MSI not requested due to driver options for device %s\n",
 552                                 pci_name(pcidev));
 553         }
 554
 555         nesdev->csr_start = pci_resource_start(nesdev->pcidev, BAR_0);
 556         nesdev->doorbell_region = pci_resource_start(nesdev->pcidev, BAR_1);
 557
 558         /* Init the adapter */
 559         nesdev->nesadapter = nes_init_adapter(nesdev, hw_rev);
 560         if (!nesdev->nesadapter) {
 561                 printk(KERN_ERR PFX "Unable to initialize adapter.\n");
 562                 ret = -ENOMEM;
 563                 goto bail5;
 564         }
 565         nesdev->nesadapter->et_rx_coalesce_usecs_irq = interrupt_mod_interval;
 566
 567         /* nesdev->base_doorbell_index =
 568                         nesdev->nesadapter->pd_config_base[PCI_FUNC(nesdev->pcidev->devfn)]; */
 569         nesdev->base_doorbell_index = 1;
 570         nesdev->doorbell_start = nesdev->nesadapter->doorbell_start;
 571         nesdev->mac_index = PCI_FUNC(nesdev->pcidev->devfn) % nesdev->nesadapter->port_count;
 572
 573         tasklet_init(&nesdev->dpc_tasklet, nes_dpc, (unsigned long)nesdev);
 574
 575         /* bring up the Control QP */
 576         if (nes_init_cqp(nesdev)) {
 577                 ret = -ENODEV;
 578                 goto bail6;
 579         }
 580
 581         /* Arm the CCQ */
 582         nes_write32(nesdev->regs+NES_CQE_ALLOC, NES_CQE_ALLOC_NOTIFY_NEXT |
 583                         PCI_FUNC(nesdev->pcidev->devfn));
 584         nes_read32(nesdev->regs+NES_CQE_ALLOC);
 585
 586         /* Enable the interrupts */
 587         nesdev->int_req = (0x101 << PCI_FUNC(nesdev->pcidev->devfn)) |
 588                         (1 << (PCI_FUNC(nesdev->pcidev->devfn)+16));
 589         if (PCI_FUNC(nesdev->pcidev->devfn) < 4) {
 590                 nesdev->int_req |= (1 << (PCI_FUNC(nesdev->pcidev->devfn)+24));
 591         }
 592
 593         /* TODO: This really should be the first driver to load, not function 0 */
 594         if (PCI_FUNC(nesdev->pcidev->devfn) == 0) {
 595                 /* pick up PCI and critical errors if the first driver to load */
 596                 nesdev->intf_int_req = NES_INTF_INT_PCIERR | NES_INTF_INT_CRITERR;
 597                 nesdev->int_req |= NES_INT_INTF;
 598         } else {
 599                 nesdev->intf_int_req = 0;
 600         }
 601         nesdev->intf_int_req |= (1 << (PCI_FUNC(nesdev->pcidev->devfn)+16));
 602         nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS0, 0);
 603         nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS1, 0);
 604         nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS2, 0x00001265);
 605         nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS4, 0x18021804);
 606
 607         nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS3, 0x17801790);
 608
 609         /* deal with both periodic and one_shot */
 610         nesdev->timer_int_req = 0x101 << PCI_FUNC(nesdev->pcidev->devfn);
 611         nesdev->nesadapter->timer_int_req |= nesdev->timer_int_req;
 612         nes_debug(NES_DBG_INIT, "setting int_req for function %u, nesdev = 0x%04X, adapter = 0x%04X\n",
 613                         PCI_FUNC(nesdev->pcidev->devfn),
 614                         nesdev->timer_int_req, nesdev->nesadapter->timer_int_req);
 615
 616         nes_write32(nesdev->regs+NES_INTF_INT_MASK, ~(nesdev->intf_int_req));
 617
 618         list_add_tail(&nesdev->list, &nes_dev_list);
 619
 620         /* Request an interrupt line for the driver */
 621         ret = request_irq(pcidev->irq, nes_interrupt, IRQF_SHARED, DRV_NAME, nesdev);
 622         if (ret) {
 623                 printk(KERN_ERR PFX "%s: requested IRQ %u is busy\n",
 624                                 pci_name(pcidev), pcidev->irq);
 625                 goto bail65;
 626         }
 627
 628         nes_write32(nesdev->regs+NES_INT_MASK, ~nesdev->int_req);
 629
 630         if (nes_notifiers_registered == 0) {
 631                 register_inetaddr_notifier(&nes_inetaddr_notifier);
 632                 register_netevent_notifier(&nes_net_notifier);
 633         }
 634         nes_notifiers_registered++;
 635
 636         /* Initialize network devices */
 637                 if ((netdev = nes_netdev_init(nesdev, mmio_regs)) == NULL) {
 638                         goto bail7;
 639                 }
 640
 641                 /* Register network device */
 642                 ret = register_netdev(netdev);
 643                 if (ret) {
 644                         printk(KERN_ERR PFX "Unable to register netdev, ret = %d\n", ret);
 645                         nes_netdev_destroy(netdev);
 646                         goto bail7;
 647                 }
 648
 649                 nes_print_macaddr(netdev);
 650                 /* create a CM core for this netdev */
 651                 nesvnic = netdev_priv(netdev);
 652
 653                 nesdev->netdev_count++;
 654                 nesdev->nesadapter->netdev_count++;
 655
 656
 657         printk(KERN_ERR PFX "%s: NetEffect RNIC driver successfully loaded.\n",
 658                         pci_name(pcidev));
 659         return 0;
 660
 661         bail7:
 662         printk(KERN_ERR PFX "bail7\n");
 663         while (nesdev->netdev_count > 0) {
 664                 nesdev->netdev_count--;
 665                 nesdev->nesadapter->netdev_count--;
 666
 667                 unregister_netdev(nesdev->netdev[nesdev->netdev_count]);
 668                 nes_netdev_destroy(nesdev->netdev[nesdev->netdev_count]);
 669         }
 670
 671         nes_debug(NES_DBG_INIT, "netdev_count=%d, nesadapter->netdev_count=%d\n",
 672                         nesdev->netdev_count, nesdev->nesadapter->netdev_count);
 673
 674         nes_notifiers_registered--;
 675         if (nes_notifiers_registered == 0) {
 676                 unregister_netevent_notifier(&nes_net_notifier);
 677                 unregister_inetaddr_notifier(&nes_inetaddr_notifier);
 678         }
 679
 680         list_del(&nesdev->list);
 681         nes_destroy_cqp(nesdev);
 682
 683         bail65:
 684         printk(KERN_ERR PFX "bail65\n");
 685         free_irq(pcidev->irq, nesdev);
 686         if (nesdev->msi_enabled) {
 687                 pci_disable_msi(pcidev);
 688         }
 689         bail6:
 690         printk(KERN_ERR PFX "bail6\n");
 691         tasklet_kill(&nesdev->dpc_tasklet);
 692         /* Deallocate the Adapter Structure */
 693         nes_destroy_adapter(nesdev->nesadapter);
 694
 695         bail5:
 696         printk(KERN_ERR PFX "bail5\n");
 697         iounmap(nesdev->regs);
 698
 699         bail3:
 700         printk(KERN_ERR PFX "bail3\n");
 701         kfree(nesdev);
 702
 703         bail2:
 704         pci_release_regions(pcidev);
 705
 706         bail1:
 707         pci_disable_device(pcidev);
 708
 709         bail0:
 710         return ret;
 711 }
 712
 713
 714 /**
 715  * nes_remove - unload from kernel
 716  */
 717 static void __devexit nes_remove(struct pci_dev *pcidev)
 718 {
 719         struct nes_device *nesdev = pci_get_drvdata(pcidev);
 720         struct net_device *netdev;
 721         int netdev_index = 0;
 722
 723                 if (nesdev->netdev_count) {
 724                         netdev = nesdev->netdev[netdev_index];
 725                         if (netdev) {
 726                                 netif_stop_queue(netdev);
 727                                 unregister_netdev(netdev);
 728                                 nes_netdev_destroy(netdev);
 729
 730                                 nesdev->netdev[netdev_index] = NULL;
 731                                 nesdev->netdev_count--;
 732                                 nesdev->nesadapter->netdev_count--;
 733                         }
 734                 }
 735
 736         nes_notifiers_registered--;
 737         if (nes_notifiers_registered == 0) {
 738                 unregister_netevent_notifier(&nes_net_notifier);
 739                 unregister_inetaddr_notifier(&nes_inetaddr_notifier);
 740         }
 741
 742         list_del(&nesdev->list);
 743         nes_destroy_cqp(nesdev);
 744
 745         free_irq(pcidev->irq, nesdev);
 746         tasklet_kill(&nesdev->dpc_tasklet);
 747
 748         /* Deallocate the Adapter Structure */
 749         nes_destroy_adapter(nesdev->nesadapter);
 750
 751         if (nesdev->msi_enabled) {
 752                 pci_disable_msi(pcidev);
 753         }
 754
 755         iounmap(nesdev->regs);
 756         kfree(nesdev);
 757
 758         /* nes_debug(NES_DBG_SHUTDOWN, "calling pci_release_regions.\n"); */
 759         pci_release_regions(pcidev);
 760         pci_disable_device(pcidev);
 761         pci_set_drvdata(pcidev, NULL);
 762 }
 763
 764
 765 static struct pci_driver nes_pci_driver = {
 766         .name = DRV_NAME,
 767         .id_table = nes_pci_table,
 768         .probe = nes_probe,
 769         .remove = __devexit_p(nes_remove),
 770 };
 771
 772 static ssize_t nes_show_adapter(struct device_driver *ddp, char *buf)
 773 {
 774         unsigned int  devfn = 0xffffffff;
 775         unsigned char bus_number = 0xff;
 776         unsigned int  i = 0;
 777         struct nes_device *nesdev;
 778
 779         list_for_each_entry(nesdev, &nes_dev_list, list) {
 780                 if (i == ee_flsh_adapter) {
 781                         devfn      = nesdev->nesadapter->devfn;
 782                         bus_number = nesdev->nesadapter->bus_number;
 783                         break;
 784                 }
 785                 i++;
 786         }
 787
 788         return snprintf(buf, PAGE_SIZE, "%x:%x", bus_number, devfn);
 789 }
 790
 791 static ssize_t nes_store_adapter(struct device_driver *ddp,
 792         const char *buf, size_t count)
 793 {
 794         char *p = (char *)buf;
 795
 796         ee_flsh_adapter = simple_strtoul(p, &p, 10);
 797         return strnlen(buf, count);
 798 }
 799
 800 static ssize_t nes_show_ee_cmd(struct device_driver *ddp, char *buf)
 801 {
 802         u32 eeprom_cmd = 0xdead;
 803         u32 i = 0;
 804         struct nes_device *nesdev;
 805
 806         list_for_each_entry(nesdev, &nes_dev_list, list) {
 807                 if (i == ee_flsh_adapter) {
 808                         eeprom_cmd = nes_read32(nesdev->regs + NES_EEPROM_COMMAND);
 809                         break;
 810                 }
 811                 i++;
 812         }
 813         return snprintf(buf, PAGE_SIZE, "0x%x\n", eeprom_cmd);
 814 }
 815
 816 static ssize_t nes_store_ee_cmd(struct device_driver *ddp,
 817         const char *buf, size_t count)
 818 {
 819         char *p = (char *)buf;
 820         u32 val;
 821         u32 i = 0;
 822         struct nes_device *nesdev;
 823
 824         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
 825                 val = simple_strtoul(p, &p, 16);
 826                 list_for_each_entry(nesdev, &nes_dev_list, list) {
 827                         if (i == ee_flsh_adapter) {
 828                                 nes_write32(nesdev->regs + NES_EEPROM_COMMAND, val);
 829                                 break;
 830                         }
 831                         i++;
 832                 }
 833         }
 834         return strnlen(buf, count);
 835 }
 836
 837 static ssize_t nes_show_ee_data(struct device_driver *ddp, char *buf)
 838 {
 839         u32 eeprom_data = 0xdead;
 840         u32 i = 0;
 841         struct nes_device *nesdev;
 842
 843         list_for_each_entry(nesdev, &nes_dev_list, list) {
 844                 if (i == ee_flsh_adapter) {
 845                         eeprom_data = nes_read32(nesdev->regs + NES_EEPROM_DATA);
 846                         break;
 847                 }
 848                 i++;
 849         }
 850
 851         return  snprintf(buf, PAGE_SIZE, "0x%x\n", eeprom_data);
 852 }
 853
 854 static ssize_t nes_store_ee_data(struct device_driver *ddp,
 855         const char *buf, size_t count)
 856 {
 857         char *p = (char *)buf;
 858         u32 val;
 859         u32 i = 0;
 860         struct nes_device *nesdev;
 861
 862         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
 863                 val = simple_strtoul(p, &p, 16);
 864                 list_for_each_entry(nesdev, &nes_dev_list, list) {
 865                         if (i == ee_flsh_adapter) {
 866                                 nes_write32(nesdev->regs + NES_EEPROM_DATA, val);
 867                                 break;
 868                         }
 869                         i++;
 870                 }
 871         }
 872         return strnlen(buf, count);
 873 }
 874
 875 static ssize_t nes_show_flash_cmd(struct device_driver *ddp, char *buf)
 876 {
 877         u32 flash_cmd = 0xdead;
 878         u32 i = 0;
 879         struct nes_device *nesdev;
 880
 881         list_for_each_entry(nesdev, &nes_dev_list, list) {
 882                 if (i == ee_flsh_adapter) {
 883                         flash_cmd = nes_read32(nesdev->regs + NES_FLASH_COMMAND);
 884                         break;
 885                 }
 886                 i++;
 887         }
 888
 889         return  snprintf(buf, PAGE_SIZE, "0x%x\n", flash_cmd);
 890 }
 891
 892 static ssize_t nes_store_flash_cmd(struct device_driver *ddp,
 893         const char *buf, size_t count)
 894 {
 895         char *p = (char *)buf;
 896         u32 val;
 897         u32 i = 0;
 898         struct nes_device *nesdev;
 899
 900         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
 901                 val = simple_strtoul(p, &p, 16);
 902                 list_for_each_entry(nesdev, &nes_dev_list, list) {
 903                         if (i == ee_flsh_adapter) {
 904                                 nes_write32(nesdev->regs + NES_FLASH_COMMAND, val);
 905                                 break;
 906                         }
 907                         i++;
 908                 }
 909         }
 910         return strnlen(buf, count);
 911 }
 912
 913 static ssize_t nes_show_flash_data(struct device_driver *ddp, char *buf)
 914 {
 915         u32 flash_data = 0xdead;
 916         u32 i = 0;
 917         struct nes_device *nesdev;
 918
 919         list_for_each_entry(nesdev, &nes_dev_list, list) {
 920                 if (i == ee_flsh_adapter) {
 921                         flash_data = nes_read32(nesdev->regs + NES_FLASH_DATA);
 922                         break;
 923                 }
 924                 i++;
 925         }
 926
 927         return  snprintf(buf, PAGE_SIZE, "0x%x\n", flash_data);
 928 }
 929
 930 static ssize_t nes_store_flash_data(struct device_driver *ddp,
 931         const char *buf, size_t count)
 932 {
 933         char *p = (char *)buf;
 934         u32 val;
 935         u32 i = 0;
 936         struct nes_device *nesdev;
 937
 938         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
 939                 val = simple_strtoul(p, &p, 16);
 940                 list_for_each_entry(nesdev, &nes_dev_list, list) {
 941                         if (i == ee_flsh_adapter) {
 942                                 nes_write32(nesdev->regs + NES_FLASH_DATA, val);
 943                                 break;
 944                         }
 945                         i++;
 946                 }
 947         }
 948         return strnlen(buf, count);
 949 }
 950
 951 static ssize_t nes_show_nonidx_addr(struct device_driver *ddp, char *buf)
 952 {
 953         return  snprintf(buf, PAGE_SIZE, "0x%x\n", sysfs_nonidx_addr);
 954 }
 955
 956 static ssize_t nes_store_nonidx_addr(struct device_driver *ddp,
 957         const char *buf, size_t count)
 958 {
 959         char *p = (char *)buf;
 960
 961         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X')
 962                 sysfs_nonidx_addr = simple_strtoul(p, &p, 16);
 963
 964         return strnlen(buf, count);
 965 }
 966
 967 static ssize_t nes_show_nonidx_data(struct device_driver *ddp, char *buf)
 968 {
 969         u32 nonidx_data = 0xdead;
 970         u32 i = 0;
 971         struct nes_device *nesdev;
 972
 973         list_for_each_entry(nesdev, &nes_dev_list, list) {
 974                 if (i == ee_flsh_adapter) {
 975                         nonidx_data = nes_read32(nesdev->regs + sysfs_nonidx_addr);
 976                         break;
 977                 }
 978                 i++;
 979         }
 980
 981         return  snprintf(buf, PAGE_SIZE, "0x%x\n", nonidx_data);
 982 }
 983
 984 static ssize_t nes_store_nonidx_data(struct device_driver *ddp,
 985         const char *buf, size_t count)
 986 {
 987         char *p = (char *)buf;
 988         u32 val;
 989         u32 i = 0;
 990         struct nes_device *nesdev;
 991
 992         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
 993                 val = simple_strtoul(p, &p, 16);
 994                 list_for_each_entry(nesdev, &nes_dev_list, list) {
 995                         if (i == ee_flsh_adapter) {
 996                                 nes_write32(nesdev->regs + sysfs_nonidx_addr, val);
 997                                 break;
 998                         }
 999                         i++;
1000                 }
1001         }
1002         return strnlen(buf, count);
1003 }
1004
1005 static ssize_t nes_show_idx_addr(struct device_driver *ddp, char *buf)
1006 {
1007         return  snprintf(buf, PAGE_SIZE, "0x%x\n", sysfs_idx_addr);
1008 }
1009
1010 static ssize_t nes_store_idx_addr(struct device_driver *ddp,
1011         const char *buf, size_t count)
1012 {
1013         char *p = (char *)buf;
1014
1015         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X')
1016                 sysfs_idx_addr = simple_strtoul(p, &p, 16);
1017
1018         return strnlen(buf, count);
1019 }
1020
1021 static ssize_t nes_show_idx_data(struct device_driver *ddp, char *buf)
1022 {
1023         u32 idx_data = 0xdead;
1024         u32 i = 0;
1025         struct nes_device *nesdev;
1026
1027         list_for_each_entry(nesdev, &nes_dev_list, list) {
1028                 if (i == ee_flsh_adapter) {
1029                         idx_data = nes_read_indexed(nesdev, sysfs_idx_addr);
1030                         break;
1031                 }
1032                 i++;
1033         }
1034
1035         return  snprintf(buf, PAGE_SIZE, "0x%x\n", idx_data);
1036 }
1037
1038 static ssize_t nes_store_idx_data(struct device_driver *ddp,
1039         const char *buf, size_t count)
1040 {
1041         char *p = (char *)buf;
1042         u32 val;
1043         u32 i = 0;
1044         struct nes_device *nesdev;
1045
1046         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
1047                 val = simple_strtoul(p, &p, 16);
1048                 list_for_each_entry(nesdev, &nes_dev_list, list) {
1049                         if (i == ee_flsh_adapter) {
1050                                 nes_write_indexed(nesdev, sysfs_idx_addr, val);
1051                                 break;
1052                         }
1053                         i++;
1054                 }
1055         }
1056         return strnlen(buf, count);
1057 }
1058
1059 static DRIVER_ATTR(adapter, S_IRUSR | S_IWUSR,
1060                    nes_show_adapter, nes_store_adapter);
1061 static DRIVER_ATTR(eeprom_cmd, S_IRUSR | S_IWUSR,
1062                    nes_show_ee_cmd, nes_store_ee_cmd);
1063 static DRIVER_ATTR(eeprom_data, S_IRUSR | S_IWUSR,
1064                    nes_show_ee_data, nes_store_ee_data);
1065 static DRIVER_ATTR(flash_cmd, S_IRUSR | S_IWUSR,
1066                    nes_show_flash_cmd, nes_store_flash_cmd);
1067 static DRIVER_ATTR(flash_data, S_IRUSR | S_IWUSR,
1068                    nes_show_flash_data, nes_store_flash_data);
1069 static DRIVER_ATTR(nonidx_addr, S_IRUSR | S_IWUSR,
1070                    nes_show_nonidx_addr, nes_store_nonidx_addr);
1071 static DRIVER_ATTR(nonidx_data, S_IRUSR | S_IWUSR,
1072                    nes_show_nonidx_data, nes_store_nonidx_data);
1073 static DRIVER_ATTR(idx_addr, S_IRUSR | S_IWUSR,
1074                    nes_show_idx_addr, nes_store_idx_addr);
1075 static DRIVER_ATTR(idx_data, S_IRUSR | S_IWUSR,
1076                    nes_show_idx_data, nes_store_idx_data);
1077
1078 static int nes_create_driver_sysfs(struct pci_driver *drv)
1079 {
1080         int error;
1081         error  = driver_create_file(&drv->driver, &driver_attr_adapter);
1082         error |= driver_create_file(&drv->driver, &driver_attr_eeprom_cmd);
1083         error |= driver_create_file(&drv->driver, &driver_attr_eeprom_data);
1084         error |= driver_create_file(&drv->driver, &driver_attr_flash_cmd);
1085         error |= driver_create_file(&drv->driver, &driver_attr_flash_data);
1086         error |= driver_create_file(&drv->driver, &driver_attr_nonidx_addr);
1087         error |= driver_create_file(&drv->driver, &driver_attr_nonidx_data);
1088         error |= driver_create_file(&drv->driver, &driver_attr_idx_addr);
1089         error |= driver_create_file(&drv->driver, &driver_attr_idx_data);
1090         return error;
1091 }
1092
1093 static void nes_remove_driver_sysfs(struct pci_driver *drv)
1094 {
1095         driver_remove_file(&drv->driver, &driver_attr_adapter);
1096         driver_remove_file(&drv->driver, &driver_attr_eeprom_cmd);
1097         driver_remove_file(&drv->driver, &driver_attr_eeprom_data);
1098         driver_remove_file(&drv->driver, &driver_attr_flash_cmd);
1099         driver_remove_file(&drv->driver, &driver_attr_flash_data);
1100         driver_remove_file(&drv->driver, &driver_attr_nonidx_addr);
1101         driver_remove_file(&drv->driver, &driver_attr_nonidx_data);
1102         driver_remove_file(&drv->driver, &driver_attr_idx_addr);
1103         driver_remove_file(&drv->driver, &driver_attr_idx_data);
1104 }
1105
1106 /**
1107  * nes_init_module - module initialization entry point
1108  */
1109 static int __init nes_init_module(void)
1110 {
1111         int retval;
1112         int retval1;
1113
1114         retval = nes_cm_start();
1115         if (retval) {
1116                 printk(KERN_ERR PFX "Unable to start NetEffect iWARP CM.\n");
1117                 return retval;
1118         }
1119         retval = pci_register_driver(&nes_pci_driver);
1120         if (retval >= 0) {
1121                 retval1 = nes_create_driver_sysfs(&nes_pci_driver);
1122                 if (retval1 < 0)
1123                         printk(KERN_ERR PFX "Unable to create NetEffect sys files.\n");
1124         }
1125         return retval;
1126 }
1127
1128
1129 /**
1130  * nes_exit_module - module unload entry point
1131  */
1132 static void __exit nes_exit_module(void)
1133 {
1134         nes_cm_stop();
1135         nes_remove_driver_sysfs(&nes_pci_driver);
1136
1137         pci_unregister_driver(&nes_pci_driver);
1138 }
1139
1140
1141 module_init(nes_init_module);
1142 module_exit(nes_exit_module);