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