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