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x86/amd-iommu: Add per IOMMU reference counting
[linux/fpc-iii.git] / drivers / net / cnic.c
blob3bf1b04f2cab77068c6cb08c206aa0174fbae6d9
1 /* cnic.c: Broadcom CNIC core network driver.
2 *
3 * Copyright (c) 2006-2009 Broadcom Corporation
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation.
8 *
9 * Original skeleton written by: John(Zongxi) Chen (zongxi@broadcom.com)
10 * Modified and maintained by: Michael Chan <mchan@broadcom.com>
11 */
12
13 #include <linux/module.h>
14
15 #include <linux/kernel.h>
16 #include <linux/errno.h>
17 #include <linux/list.h>
18 #include <linux/slab.h>
19 #include <linux/pci.h>
20 #include <linux/init.h>
21 #include <linux/netdevice.h>
22 #include <linux/uio_driver.h>
23 #include <linux/in.h>
24 #include <linux/dma-mapping.h>
25 #include <linux/delay.h>
26 #include <linux/ethtool.h>
27 #include <linux/if_vlan.h>
28 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
29 #define BCM_VLAN 1
30 #endif
31 #include <net/ip.h>
32 #include <net/tcp.h>
33 #include <net/route.h>
34 #include <net/ipv6.h>
35 #include <net/ip6_route.h>
36 #include <scsi/iscsi_if.h>
37
38 #include "cnic_if.h"
39 #include "bnx2.h"
40 #include "cnic.h"
41 #include "cnic_defs.h"
42
43 #define DRV_MODULE_NAME "cnic"
44 #define PFX DRV_MODULE_NAME ": "
45
46 static char version[] __devinitdata =
47 "Broadcom NetXtreme II CNIC Driver " DRV_MODULE_NAME " v" CNIC_MODULE_VERSION " (" CNIC_MODULE_RELDATE ")\n";
48
49 MODULE_AUTHOR("Michael Chan <mchan@broadcom.com> and John(Zongxi) "
50 "Chen (zongxi@broadcom.com");
51 MODULE_DESCRIPTION("Broadcom NetXtreme II CNIC Driver");
52 MODULE_LICENSE("GPL");
53 MODULE_VERSION(CNIC_MODULE_VERSION);
54
55 static LIST_HEAD(cnic_dev_list);
56 static DEFINE_RWLOCK(cnic_dev_lock);
57 static DEFINE_MUTEX(cnic_lock);
58
59 static struct cnic_ulp_ops *cnic_ulp_tbl[MAX_CNIC_ULP_TYPE];
60
61 static int cnic_service_bnx2(void *, void *);
62 static int cnic_ctl(void *, struct cnic_ctl_info *);
63
64 static struct cnic_ops cnic_bnx2_ops = {
65 .cnic_owner = THIS_MODULE,
66 .cnic_handler = cnic_service_bnx2,
67 .cnic_ctl = cnic_ctl,
68 };
69
70 static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *);
71 static void cnic_init_bnx2_tx_ring(struct cnic_dev *);
72 static void cnic_init_bnx2_rx_ring(struct cnic_dev *);
73 static int cnic_cm_set_pg(struct cnic_sock *);
74
75 static int cnic_uio_open(struct uio_info *uinfo, struct inode *inode)
76 {
77 struct cnic_dev *dev = uinfo->priv;
78 struct cnic_local *cp = dev->cnic_priv;
79
80 if (!capable(CAP_NET_ADMIN))
81 return -EPERM;
82
83 if (cp->uio_dev != -1)
84 return -EBUSY;
85
86 cp->uio_dev = iminor(inode);
87
88 cnic_init_bnx2_tx_ring(dev);
89 cnic_init_bnx2_rx_ring(dev);
90
91 return 0;
92 }
93
94 static int cnic_uio_close(struct uio_info *uinfo, struct inode *inode)
95 {
96 struct cnic_dev *dev = uinfo->priv;
97 struct cnic_local *cp = dev->cnic_priv;
98
99 cnic_shutdown_bnx2_rx_ring(dev);
100
101 cp->uio_dev = -1;
102 return 0;
103 }
104
105 static inline void cnic_hold(struct cnic_dev *dev)
106 {
107 atomic_inc(&dev->ref_count);
108 }
109
110 static inline void cnic_put(struct cnic_dev *dev)
111 {
112 atomic_dec(&dev->ref_count);
113 }
114
115 static inline void csk_hold(struct cnic_sock *csk)
116 {
117 atomic_inc(&csk->ref_count);
118 }
119
120 static inline void csk_put(struct cnic_sock *csk)
121 {
122 atomic_dec(&csk->ref_count);
123 }
124
125 static struct cnic_dev *cnic_from_netdev(struct net_device *netdev)
126 {
127 struct cnic_dev *cdev;
128
129 read_lock(&cnic_dev_lock);
130 list_for_each_entry(cdev, &cnic_dev_list, list) {
131 if (netdev == cdev->netdev) {
132 cnic_hold(cdev);
133 read_unlock(&cnic_dev_lock);
134 return cdev;
135 }
136 }
137 read_unlock(&cnic_dev_lock);
138 return NULL;
139 }
140
141 static inline void ulp_get(struct cnic_ulp_ops *ulp_ops)
142 {
143 atomic_inc(&ulp_ops->ref_count);
144 }
145
146 static inline void ulp_put(struct cnic_ulp_ops *ulp_ops)
147 {
148 atomic_dec(&ulp_ops->ref_count);
149 }
150
151 static void cnic_ctx_wr(struct cnic_dev *dev, u32 cid_addr, u32 off, u32 val)
152 {
153 struct cnic_local *cp = dev->cnic_priv;
154 struct cnic_eth_dev *ethdev = cp->ethdev;
155 struct drv_ctl_info info;
156 struct drv_ctl_io *io = &info.data.io;
157
158 info.cmd = DRV_CTL_CTX_WR_CMD;
159 io->cid_addr = cid_addr;
160 io->offset = off;
161 io->data = val;
162 ethdev->drv_ctl(dev->netdev, &info);
163 }
164
165 static void cnic_reg_wr_ind(struct cnic_dev *dev, u32 off, u32 val)
166 {
167 struct cnic_local *cp = dev->cnic_priv;
168 struct cnic_eth_dev *ethdev = cp->ethdev;
169 struct drv_ctl_info info;
170 struct drv_ctl_io *io = &info.data.io;
171
172 info.cmd = DRV_CTL_IO_WR_CMD;
173 io->offset = off;
174 io->data = val;
175 ethdev->drv_ctl(dev->netdev, &info);
176 }
177
178 static u32 cnic_reg_rd_ind(struct cnic_dev *dev, u32 off)
179 {
180 struct cnic_local *cp = dev->cnic_priv;
181 struct cnic_eth_dev *ethdev = cp->ethdev;
182 struct drv_ctl_info info;
183 struct drv_ctl_io *io = &info.data.io;
184
185 info.cmd = DRV_CTL_IO_RD_CMD;
186 io->offset = off;
187 ethdev->drv_ctl(dev->netdev, &info);
188 return io->data;
189 }
190
191 static int cnic_in_use(struct cnic_sock *csk)
192 {
193 return test_bit(SK_F_INUSE, &csk->flags);
194 }
195
196 static void cnic_kwq_completion(struct cnic_dev *dev, u32 count)
197 {
198 struct cnic_local *cp = dev->cnic_priv;
199 struct cnic_eth_dev *ethdev = cp->ethdev;
200 struct drv_ctl_info info;
201
202 info.cmd = DRV_CTL_COMPLETION_CMD;
203 info.data.comp.comp_count = count;
204 ethdev->drv_ctl(dev->netdev, &info);
205 }
206
207 static int cnic_send_nlmsg(struct cnic_local *cp, u32 type,
208 struct cnic_sock *csk)
209 {
210 struct iscsi_path path_req;
211 char *buf = NULL;
212 u16 len = 0;
213 u32 msg_type = ISCSI_KEVENT_IF_DOWN;
214 struct cnic_ulp_ops *ulp_ops;
215
216 if (cp->uio_dev == -1)
217 return -ENODEV;
218
219 if (csk) {
220 len = sizeof(path_req);
221 buf = (char *) &path_req;
222 memset(&path_req, 0, len);
223
224 msg_type = ISCSI_KEVENT_PATH_REQ;
225 path_req.handle = (u64) csk->l5_cid;
226 if (test_bit(SK_F_IPV6, &csk->flags)) {
227 memcpy(&path_req.dst.v6_addr, &csk->dst_ip[0],
228 sizeof(struct in6_addr));
229 path_req.ip_addr_len = 16;
230 } else {
231 memcpy(&path_req.dst.v4_addr, &csk->dst_ip[0],
232 sizeof(struct in_addr));
233 path_req.ip_addr_len = 4;
234 }
235 path_req.vlan_id = csk->vlan_id;
236 path_req.pmtu = csk->mtu;
237 }
238
239 rcu_read_lock();
240 ulp_ops = rcu_dereference(cnic_ulp_tbl[CNIC_ULP_ISCSI]);
241 if (ulp_ops)
242 ulp_ops->iscsi_nl_send_msg(cp->dev, msg_type, buf, len);
243 rcu_read_unlock();
244 return 0;
245 }
246
247 static int cnic_iscsi_nl_msg_recv(struct cnic_dev *dev, u32 msg_type,
248 char *buf, u16 len)
249 {
250 int rc = -EINVAL;
251
252 switch (msg_type) {
253 case ISCSI_UEVENT_PATH_UPDATE: {
254 struct cnic_local *cp;
255 u32 l5_cid;
256 struct cnic_sock *csk;
257 struct iscsi_path *path_resp;
258
259 if (len < sizeof(*path_resp))
260 break;
261
262 path_resp = (struct iscsi_path *) buf;
263 cp = dev->cnic_priv;
264 l5_cid = (u32) path_resp->handle;
265 if (l5_cid >= MAX_CM_SK_TBL_SZ)
266 break;
267
268 csk = &cp->csk_tbl[l5_cid];
269 csk_hold(csk);
270 if (cnic_in_use(csk)) {
271 memcpy(csk->ha, path_resp->mac_addr, 6);
272 if (test_bit(SK_F_IPV6, &csk->flags))
273 memcpy(&csk->src_ip[0], &path_resp->src.v6_addr,
274 sizeof(struct in6_addr));
275 else
276 memcpy(&csk->src_ip[0], &path_resp->src.v4_addr,
277 sizeof(struct in_addr));
278 if (is_valid_ether_addr(csk->ha))
279 cnic_cm_set_pg(csk);
280 }
281 csk_put(csk);
282 rc = 0;
283 }
284 }
285
286 return rc;
287 }
288
289 static int cnic_offld_prep(struct cnic_sock *csk)
290 {
291 if (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
292 return 0;
293
294 if (!test_bit(SK_F_CONNECT_START, &csk->flags)) {
295 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
296 return 0;
297 }
298
299 return 1;
300 }
301
302 static int cnic_close_prep(struct cnic_sock *csk)
303 {
304 clear_bit(SK_F_CONNECT_START, &csk->flags);
305 smp_mb__after_clear_bit();
306
307 if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags)) {
308 while (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
309 msleep(1);
310
311 return 1;
312 }
313 return 0;
314 }
315
316 static int cnic_abort_prep(struct cnic_sock *csk)
317 {
318 clear_bit(SK_F_CONNECT_START, &csk->flags);
319 smp_mb__after_clear_bit();
320
321 while (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
322 msleep(1);
323
324 if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags)) {
325 csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
326 return 1;
327 }
328
329 return 0;
330 }
331
332 static void cnic_uio_stop(void)
333 {
334 struct cnic_dev *dev;
335
336 read_lock(&cnic_dev_lock);
337 list_for_each_entry(dev, &cnic_dev_list, list) {
338 struct cnic_local *cp = dev->cnic_priv;
339
340 if (cp->cnic_uinfo)
341 cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
342 }
343 read_unlock(&cnic_dev_lock);
344 }
345
346 int cnic_register_driver(int ulp_type, struct cnic_ulp_ops *ulp_ops)
347 {
348 struct cnic_dev *dev;
349
350 if (ulp_type >= MAX_CNIC_ULP_TYPE) {
351 printk(KERN_ERR PFX "cnic_register_driver: Bad type %d\n",
352 ulp_type);
353 return -EINVAL;
354 }
355 mutex_lock(&cnic_lock);
356 if (cnic_ulp_tbl[ulp_type]) {
357 printk(KERN_ERR PFX "cnic_register_driver: Type %d has already "
358 "been registered\n", ulp_type);
359 mutex_unlock(&cnic_lock);
360 return -EBUSY;
361 }
362
363 read_lock(&cnic_dev_lock);
364 list_for_each_entry(dev, &cnic_dev_list, list) {
365 struct cnic_local *cp = dev->cnic_priv;
366
367 clear_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]);
368 }
369 read_unlock(&cnic_dev_lock);
370
371 atomic_set(&ulp_ops->ref_count, 0);
372 rcu_assign_pointer(cnic_ulp_tbl[ulp_type], ulp_ops);
373 mutex_unlock(&cnic_lock);
374
375 /* Prevent race conditions with netdev_event */
376 rtnl_lock();
377 read_lock(&cnic_dev_lock);
378 list_for_each_entry(dev, &cnic_dev_list, list) {
379 struct cnic_local *cp = dev->cnic_priv;
380
381 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]))
382 ulp_ops->cnic_init(dev);
383 }
384 read_unlock(&cnic_dev_lock);
385 rtnl_unlock();
386
387 return 0;
388 }
389
390 int cnic_unregister_driver(int ulp_type)
391 {
392 struct cnic_dev *dev;
393 struct cnic_ulp_ops *ulp_ops;
394 int i = 0;
395
396 if (ulp_type >= MAX_CNIC_ULP_TYPE) {
397 printk(KERN_ERR PFX "cnic_unregister_driver: Bad type %d\n",
398 ulp_type);
399 return -EINVAL;
400 }
401 mutex_lock(&cnic_lock);
402 ulp_ops = cnic_ulp_tbl[ulp_type];
403 if (!ulp_ops) {
404 printk(KERN_ERR PFX "cnic_unregister_driver: Type %d has not "
405 "been registered\n", ulp_type);
406 goto out_unlock;
407 }
408 read_lock(&cnic_dev_lock);
409 list_for_each_entry(dev, &cnic_dev_list, list) {
410 struct cnic_local *cp = dev->cnic_priv;
411
412 if (rcu_dereference(cp->ulp_ops[ulp_type])) {
413 printk(KERN_ERR PFX "cnic_unregister_driver: Type %d "
414 "still has devices registered\n", ulp_type);
415 read_unlock(&cnic_dev_lock);
416 goto out_unlock;
417 }
418 }
419 read_unlock(&cnic_dev_lock);
420
421 if (ulp_type == CNIC_ULP_ISCSI)
422 cnic_uio_stop();
423
424 rcu_assign_pointer(cnic_ulp_tbl[ulp_type], NULL);
425
426 mutex_unlock(&cnic_lock);
427 synchronize_rcu();
428 while ((atomic_read(&ulp_ops->ref_count) != 0) && (i < 20)) {
429 msleep(100);
430 i++;
431 }
432
433 if (atomic_read(&ulp_ops->ref_count) != 0)
434 printk(KERN_WARNING PFX "%s: Failed waiting for ref count to go"
435 " to zero.\n", dev->netdev->name);
436 return 0;
437
438 out_unlock:
439 mutex_unlock(&cnic_lock);
440 return -EINVAL;
441 }
442
443 static int cnic_start_hw(struct cnic_dev *);
444 static void cnic_stop_hw(struct cnic_dev *);
445
446 static int cnic_register_device(struct cnic_dev *dev, int ulp_type,
447 void *ulp_ctx)
448 {
449 struct cnic_local *cp = dev->cnic_priv;
450 struct cnic_ulp_ops *ulp_ops;
451
452 if (ulp_type >= MAX_CNIC_ULP_TYPE) {
453 printk(KERN_ERR PFX "cnic_register_device: Bad type %d\n",
454 ulp_type);
455 return -EINVAL;
456 }
457 mutex_lock(&cnic_lock);
458 if (cnic_ulp_tbl[ulp_type] == NULL) {
459 printk(KERN_ERR PFX "cnic_register_device: Driver with type %d "
460 "has not been registered\n", ulp_type);
461 mutex_unlock(&cnic_lock);
462 return -EAGAIN;
463 }
464 if (rcu_dereference(cp->ulp_ops[ulp_type])) {
465 printk(KERN_ERR PFX "cnic_register_device: Type %d has already "
466 "been registered to this device\n", ulp_type);
467 mutex_unlock(&cnic_lock);
468 return -EBUSY;
469 }
470
471 clear_bit(ULP_F_START, &cp->ulp_flags[ulp_type]);
472 cp->ulp_handle[ulp_type] = ulp_ctx;
473 ulp_ops = cnic_ulp_tbl[ulp_type];
474 rcu_assign_pointer(cp->ulp_ops[ulp_type], ulp_ops);
475 cnic_hold(dev);
476
477 if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
478 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[ulp_type]))
479 ulp_ops->cnic_start(cp->ulp_handle[ulp_type]);
480
481 mutex_unlock(&cnic_lock);
482
483 return 0;
484
485 }
486 EXPORT_SYMBOL(cnic_register_driver);
487
488 static int cnic_unregister_device(struct cnic_dev *dev, int ulp_type)
489 {
490 struct cnic_local *cp = dev->cnic_priv;
491 int i = 0;
492
493 if (ulp_type >= MAX_CNIC_ULP_TYPE) {
494 printk(KERN_ERR PFX "cnic_unregister_device: Bad type %d\n",
495 ulp_type);
496 return -EINVAL;
497 }
498 mutex_lock(&cnic_lock);
499 if (rcu_dereference(cp->ulp_ops[ulp_type])) {
500 rcu_assign_pointer(cp->ulp_ops[ulp_type], NULL);
501 cnic_put(dev);
502 } else {
503 printk(KERN_ERR PFX "cnic_unregister_device: device not "
504 "registered to this ulp type %d\n", ulp_type);
505 mutex_unlock(&cnic_lock);
506 return -EINVAL;
507 }
508 mutex_unlock(&cnic_lock);
509
510 synchronize_rcu();
511
512 while (test_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[ulp_type]) &&
513 i < 20) {
514 msleep(100);
515 i++;
516 }
517 if (test_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[ulp_type]))
518 printk(KERN_WARNING PFX "%s: Failed waiting for ULP up call"
519 " to complete.\n", dev->netdev->name);
520
521 return 0;
522 }
523 EXPORT_SYMBOL(cnic_unregister_driver);
524
525 static int cnic_init_id_tbl(struct cnic_id_tbl *id_tbl, u32 size, u32 start_id)
526 {
527 id_tbl->start = start_id;
528 id_tbl->max = size;
529 id_tbl->next = 0;
530 spin_lock_init(&id_tbl->lock);
531 id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
532 if (!id_tbl->table)
533 return -ENOMEM;
534
535 return 0;
536 }
537
538 static void cnic_free_id_tbl(struct cnic_id_tbl *id_tbl)
539 {
540 kfree(id_tbl->table);
541 id_tbl->table = NULL;
542 }
543
544 static int cnic_alloc_id(struct cnic_id_tbl *id_tbl, u32 id)
545 {
546 int ret = -1;
547
548 id -= id_tbl->start;
549 if (id >= id_tbl->max)
550 return ret;
551
552 spin_lock(&id_tbl->lock);
553 if (!test_bit(id, id_tbl->table)) {
554 set_bit(id, id_tbl->table);
555 ret = 0;
556 }
557 spin_unlock(&id_tbl->lock);
558 return ret;
559 }
560
561 /* Returns -1 if not successful */
562 static u32 cnic_alloc_new_id(struct cnic_id_tbl *id_tbl)
563 {
564 u32 id;
565
566 spin_lock(&id_tbl->lock);
567 id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
568 if (id >= id_tbl->max) {
569 id = -1;
570 if (id_tbl->next != 0) {
571 id = find_first_zero_bit(id_tbl->table, id_tbl->next);
572 if (id >= id_tbl->next)
573 id = -1;
574 }
575 }
576
577 if (id < id_tbl->max) {
578 set_bit(id, id_tbl->table);
579 id_tbl->next = (id + 1) & (id_tbl->max - 1);
580 id += id_tbl->start;
581 }
582
583 spin_unlock(&id_tbl->lock);
584
585 return id;
586 }
587
588 static void cnic_free_id(struct cnic_id_tbl *id_tbl, u32 id)
589 {
590 if (id == -1)
591 return;
592
593 id -= id_tbl->start;
594 if (id >= id_tbl->max)
595 return;
596
597 clear_bit(id, id_tbl->table);
598 }
599
600 static void cnic_free_dma(struct cnic_dev *dev, struct cnic_dma *dma)
601 {
602 int i;
603
604 if (!dma->pg_arr)
605 return;
606
607 for (i = 0; i < dma->num_pages; i++) {
608 if (dma->pg_arr[i]) {
609 pci_free_consistent(dev->pcidev, BCM_PAGE_SIZE,
610 dma->pg_arr[i], dma->pg_map_arr[i]);
611 dma->pg_arr[i] = NULL;
612 }
613 }
614 if (dma->pgtbl) {
615 pci_free_consistent(dev->pcidev, dma->pgtbl_size,
616 dma->pgtbl, dma->pgtbl_map);
617 dma->pgtbl = NULL;
618 }
619 kfree(dma->pg_arr);
620 dma->pg_arr = NULL;
621 dma->num_pages = 0;
622 }
623
624 static void cnic_setup_page_tbl(struct cnic_dev *dev, struct cnic_dma *dma)
625 {
626 int i;
627 u32 *page_table = dma->pgtbl;
628
629 for (i = 0; i < dma->num_pages; i++) {
630 /* Each entry needs to be in big endian format. */
631 *page_table = (u32) ((u64) dma->pg_map_arr[i] >> 32);
632 page_table++;
633 *page_table = (u32) dma->pg_map_arr[i];
634 page_table++;
635 }
636 }
637
638 static int cnic_alloc_dma(struct cnic_dev *dev, struct cnic_dma *dma,
639 int pages, int use_pg_tbl)
640 {
641 int i, size;
642 struct cnic_local *cp = dev->cnic_priv;
643
644 size = pages * (sizeof(void *) + sizeof(dma_addr_t));
645 dma->pg_arr = kzalloc(size, GFP_ATOMIC);
646 if (dma->pg_arr == NULL)
647 return -ENOMEM;
648
649 dma->pg_map_arr = (dma_addr_t *) (dma->pg_arr + pages);
650 dma->num_pages = pages;
651
652 for (i = 0; i < pages; i++) {
653 dma->pg_arr[i] = pci_alloc_consistent(dev->pcidev,
654 BCM_PAGE_SIZE,
655 &dma->pg_map_arr[i]);
656 if (dma->pg_arr[i] == NULL)
657 goto error;
658 }
659 if (!use_pg_tbl)
660 return 0;
661
662 dma->pgtbl_size = ((pages * 8) + BCM_PAGE_SIZE - 1) &
663 ~(BCM_PAGE_SIZE - 1);
664 dma->pgtbl = pci_alloc_consistent(dev->pcidev, dma->pgtbl_size,
665 &dma->pgtbl_map);
666 if (dma->pgtbl == NULL)
667 goto error;
668
669 cp->setup_pgtbl(dev, dma);
670
671 return 0;
672
673 error:
674 cnic_free_dma(dev, dma);
675 return -ENOMEM;
676 }
677
678 static void cnic_free_resc(struct cnic_dev *dev)
679 {
680 struct cnic_local *cp = dev->cnic_priv;
681 int i = 0;
682
683 if (cp->cnic_uinfo) {
684 while (cp->uio_dev != -1 && i < 15) {
685 msleep(100);
686 i++;
687 }
688 uio_unregister_device(cp->cnic_uinfo);
689 kfree(cp->cnic_uinfo);
690 cp->cnic_uinfo = NULL;
691 }
692
693 if (cp->l2_buf) {
694 pci_free_consistent(dev->pcidev, cp->l2_buf_size,
695 cp->l2_buf, cp->l2_buf_map);
696 cp->l2_buf = NULL;
697 }
698
699 if (cp->l2_ring) {
700 pci_free_consistent(dev->pcidev, cp->l2_ring_size,
701 cp->l2_ring, cp->l2_ring_map);
702 cp->l2_ring = NULL;
703 }
704
705 for (i = 0; i < cp->ctx_blks; i++) {
706 if (cp->ctx_arr[i].ctx) {
707 pci_free_consistent(dev->pcidev, cp->ctx_blk_size,
708 cp->ctx_arr[i].ctx,
709 cp->ctx_arr[i].mapping);
710 cp->ctx_arr[i].ctx = NULL;
711 }
712 }
713 kfree(cp->ctx_arr);
714 cp->ctx_arr = NULL;
715 cp->ctx_blks = 0;
716
717 cnic_free_dma(dev, &cp->gbl_buf_info);
718 cnic_free_dma(dev, &cp->conn_buf_info);
719 cnic_free_dma(dev, &cp->kwq_info);
720 cnic_free_dma(dev, &cp->kcq_info);
721 kfree(cp->iscsi_tbl);
722 cp->iscsi_tbl = NULL;
723 kfree(cp->ctx_tbl);
724 cp->ctx_tbl = NULL;
725
726 cnic_free_id_tbl(&cp->cid_tbl);
727 }
728
729 static int cnic_alloc_context(struct cnic_dev *dev)
730 {
731 struct cnic_local *cp = dev->cnic_priv;
732
733 if (CHIP_NUM(cp) == CHIP_NUM_5709) {
734 int i, k, arr_size;
735
736 cp->ctx_blk_size = BCM_PAGE_SIZE;
737 cp->cids_per_blk = BCM_PAGE_SIZE / 128;
738 arr_size = BNX2_MAX_CID / cp->cids_per_blk *
739 sizeof(struct cnic_ctx);
740 cp->ctx_arr = kzalloc(arr_size, GFP_KERNEL);
741 if (cp->ctx_arr == NULL)
742 return -ENOMEM;
743
744 k = 0;
745 for (i = 0; i < 2; i++) {
746 u32 j, reg, off, lo, hi;
747
748 if (i == 0)
749 off = BNX2_PG_CTX_MAP;
750 else
751 off = BNX2_ISCSI_CTX_MAP;
752
753 reg = cnic_reg_rd_ind(dev, off);
754 lo = reg >> 16;
755 hi = reg & 0xffff;
756 for (j = lo; j < hi; j += cp->cids_per_blk, k++)
757 cp->ctx_arr[k].cid = j;
758 }
759
760 cp->ctx_blks = k;
761 if (cp->ctx_blks >= (BNX2_MAX_CID / cp->cids_per_blk)) {
762 cp->ctx_blks = 0;
763 return -ENOMEM;
764 }
765
766 for (i = 0; i < cp->ctx_blks; i++) {
767 cp->ctx_arr[i].ctx =
768 pci_alloc_consistent(dev->pcidev, BCM_PAGE_SIZE,
769 &cp->ctx_arr[i].mapping);
770 if (cp->ctx_arr[i].ctx == NULL)
771 return -ENOMEM;
772 }
773 }
774 return 0;
775 }
776
777 static int cnic_alloc_l2_rings(struct cnic_dev *dev, int pages)
778 {
779 struct cnic_local *cp = dev->cnic_priv;
780
781 cp->l2_ring_size = pages * BCM_PAGE_SIZE;
782 cp->l2_ring = pci_alloc_consistent(dev->pcidev, cp->l2_ring_size,
783 &cp->l2_ring_map);
784 if (!cp->l2_ring)
785 return -ENOMEM;
786
787 cp->l2_buf_size = (cp->l2_rx_ring_size + 1) * cp->l2_single_buf_size;
788 cp->l2_buf_size = PAGE_ALIGN(cp->l2_buf_size);
789 cp->l2_buf = pci_alloc_consistent(dev->pcidev, cp->l2_buf_size,
790 &cp->l2_buf_map);
791 if (!cp->l2_buf)
792 return -ENOMEM;
793
794 return 0;
795 }
796
797 static int cnic_alloc_uio(struct cnic_dev *dev) {
798 struct cnic_local *cp = dev->cnic_priv;
799 struct uio_info *uinfo;
800 int ret;
801
802 uinfo = kzalloc(sizeof(*uinfo), GFP_ATOMIC);
803 if (!uinfo)
804 return -ENOMEM;
805
806 uinfo->mem[0].addr = dev->netdev->base_addr;
807 uinfo->mem[0].internal_addr = dev->regview;
808 uinfo->mem[0].size = dev->netdev->mem_end - dev->netdev->mem_start;
809 uinfo->mem[0].memtype = UIO_MEM_PHYS;
810
811 uinfo->mem[1].addr = (unsigned long) cp->status_blk & PAGE_MASK;
812 if (test_bit(CNIC_F_BNX2_CLASS, &dev->flags)) {
813 if (cp->ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX)
814 uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE * 9;
815 else
816 uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE;
817
818 uinfo->name = "bnx2_cnic";
819 }
820
821 uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
822
823 uinfo->mem[2].addr = (unsigned long) cp->l2_ring;
824 uinfo->mem[2].size = cp->l2_ring_size;
825 uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
826
827 uinfo->mem[3].addr = (unsigned long) cp->l2_buf;
828 uinfo->mem[3].size = cp->l2_buf_size;
829 uinfo->mem[3].memtype = UIO_MEM_LOGICAL;
830
831 uinfo->version = CNIC_MODULE_VERSION;
832 uinfo->irq = UIO_IRQ_CUSTOM;
833
834 uinfo->open = cnic_uio_open;
835 uinfo->release = cnic_uio_close;
836
837 uinfo->priv = dev;
838
839 ret = uio_register_device(&dev->pcidev->dev, uinfo);
840 if (ret) {
841 kfree(uinfo);
842 return ret;
843 }
844
845 cp->cnic_uinfo = uinfo;
846 return 0;
847 }
848
849 static int cnic_alloc_bnx2_resc(struct cnic_dev *dev)
850 {
851 struct cnic_local *cp = dev->cnic_priv;
852 int ret;
853
854 ret = cnic_alloc_dma(dev, &cp->kwq_info, KWQ_PAGE_CNT, 1);
855 if (ret)
856 goto error;
857 cp->kwq = (struct kwqe **) cp->kwq_info.pg_arr;
858
859 ret = cnic_alloc_dma(dev, &cp->kcq_info, KCQ_PAGE_CNT, 1);
860 if (ret)
861 goto error;
862 cp->kcq = (struct kcqe **) cp->kcq_info.pg_arr;
863
864 ret = cnic_alloc_context(dev);
865 if (ret)
866 goto error;
867
868 ret = cnic_alloc_l2_rings(dev, 2);
869 if (ret)
870 goto error;
871
872 ret = cnic_alloc_uio(dev);
873 if (ret)
874 goto error;
875
876 return 0;
877
878 error:
879 cnic_free_resc(dev);
880 return ret;
881 }
882
883 static inline u32 cnic_kwq_avail(struct cnic_local *cp)
884 {
885 return cp->max_kwq_idx -
886 ((cp->kwq_prod_idx - cp->kwq_con_idx) & cp->max_kwq_idx);
887 }
888
889 static int cnic_submit_bnx2_kwqes(struct cnic_dev *dev, struct kwqe *wqes[],
890 u32 num_wqes)
891 {
892 struct cnic_local *cp = dev->cnic_priv;
893 struct kwqe *prod_qe;
894 u16 prod, sw_prod, i;
895
896 if (!test_bit(CNIC_F_CNIC_UP, &dev->flags))
897 return -EAGAIN; /* bnx2 is down */
898
899 spin_lock_bh(&cp->cnic_ulp_lock);
900 if (num_wqes > cnic_kwq_avail(cp) &&
901 !(cp->cnic_local_flags & CNIC_LCL_FL_KWQ_INIT)) {
902 spin_unlock_bh(&cp->cnic_ulp_lock);
903 return -EAGAIN;
904 }
905
906 cp->cnic_local_flags &= ~CNIC_LCL_FL_KWQ_INIT;
907
908 prod = cp->kwq_prod_idx;
909 sw_prod = prod & MAX_KWQ_IDX;
910 for (i = 0; i < num_wqes; i++) {
911 prod_qe = &cp->kwq[KWQ_PG(sw_prod)][KWQ_IDX(sw_prod)];
912 memcpy(prod_qe, wqes[i], sizeof(struct kwqe));
913 prod++;
914 sw_prod = prod & MAX_KWQ_IDX;
915 }
916 cp->kwq_prod_idx = prod;
917
918 CNIC_WR16(dev, cp->kwq_io_addr, cp->kwq_prod_idx);
919
920 spin_unlock_bh(&cp->cnic_ulp_lock);
921 return 0;
922 }
923
924 static void service_kcqes(struct cnic_dev *dev, int num_cqes)
925 {
926 struct cnic_local *cp = dev->cnic_priv;
927 int i, j;
928
929 i = 0;
930 j = 1;
931 while (num_cqes) {
932 struct cnic_ulp_ops *ulp_ops;
933 int ulp_type;
934 u32 kcqe_op_flag = cp->completed_kcq[i]->kcqe_op_flag;
935 u32 kcqe_layer = kcqe_op_flag & KCQE_FLAGS_LAYER_MASK;
936
937 if (unlikely(kcqe_op_flag & KCQE_RAMROD_COMPLETION))
938 cnic_kwq_completion(dev, 1);
939
940 while (j < num_cqes) {
941 u32 next_op = cp->completed_kcq[i + j]->kcqe_op_flag;
942
943 if ((next_op & KCQE_FLAGS_LAYER_MASK) != kcqe_layer)
944 break;
945
946 if (unlikely(next_op & KCQE_RAMROD_COMPLETION))
947 cnic_kwq_completion(dev, 1);
948 j++;
949 }
950
951 if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_RDMA)
952 ulp_type = CNIC_ULP_RDMA;
953 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_ISCSI)
954 ulp_type = CNIC_ULP_ISCSI;
955 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L4)
956 ulp_type = CNIC_ULP_L4;
957 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L2)
958 goto end;
959 else {
960 printk(KERN_ERR PFX "%s: Unknown type of KCQE(0x%x)\n",
961 dev->netdev->name, kcqe_op_flag);
962 goto end;
963 }
964
965 rcu_read_lock();
966 ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
967 if (likely(ulp_ops)) {
968 ulp_ops->indicate_kcqes(cp->ulp_handle[ulp_type],
969 cp->completed_kcq + i, j);
970 }
971 rcu_read_unlock();
972 end:
973 num_cqes -= j;
974 i += j;
975 j = 1;
976 }
977 return;
978 }
979
980 static u16 cnic_bnx2_next_idx(u16 idx)
981 {
982 return idx + 1;
983 }
984
985 static u16 cnic_bnx2_hw_idx(u16 idx)
986 {
987 return idx;
988 }
989
990 static int cnic_get_kcqes(struct cnic_dev *dev, u16 hw_prod, u16 *sw_prod)
991 {
992 struct cnic_local *cp = dev->cnic_priv;
993 u16 i, ri, last;
994 struct kcqe *kcqe;
995 int kcqe_cnt = 0, last_cnt = 0;
996
997 i = ri = last = *sw_prod;
998 ri &= MAX_KCQ_IDX;
999
1000 while ((i != hw_prod) && (kcqe_cnt < MAX_COMPLETED_KCQE)) {
1001 kcqe = &cp->kcq[KCQ_PG(ri)][KCQ_IDX(ri)];
1002 cp->completed_kcq[kcqe_cnt++] = kcqe;
1003 i = cp->next_idx(i);
1004 ri = i & MAX_KCQ_IDX;
1005 if (likely(!(kcqe->kcqe_op_flag & KCQE_FLAGS_NEXT))) {
1006 last_cnt = kcqe_cnt;
1007 last = i;
1008 }
1009 }
1010
1011 *sw_prod = last;
1012 return last_cnt;
1013 }
1014
1015 static void cnic_chk_bnx2_pkt_rings(struct cnic_local *cp)
1016 {
1017 u16 rx_cons = *cp->rx_cons_ptr;
1018 u16 tx_cons = *cp->tx_cons_ptr;
1019
1020 if (cp->tx_cons != tx_cons || cp->rx_cons != rx_cons) {
1021 cp->tx_cons = tx_cons;
1022 cp->rx_cons = rx_cons;
1023 uio_event_notify(cp->cnic_uinfo);
1024 }
1025 }
1026
1027 static int cnic_service_bnx2(void *data, void *status_blk)
1028 {
1029 struct cnic_dev *dev = data;
1030 struct status_block *sblk = status_blk;
1031 struct cnic_local *cp = dev->cnic_priv;
1032 u32 status_idx = sblk->status_idx;
1033 u16 hw_prod, sw_prod;
1034 int kcqe_cnt;
1035
1036 if (unlikely(!test_bit(CNIC_F_CNIC_UP, &dev->flags)))
1037 return status_idx;
1038
1039 cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
1040
1041 hw_prod = sblk->status_completion_producer_index;
1042 sw_prod = cp->kcq_prod_idx;
1043 while (sw_prod != hw_prod) {
1044 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
1045 if (kcqe_cnt == 0)
1046 goto done;
1047
1048 service_kcqes(dev, kcqe_cnt);
1049
1050 /* Tell compiler that status_blk fields can change. */
1051 barrier();
1052 if (status_idx != sblk->status_idx) {
1053 status_idx = sblk->status_idx;
1054 cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
1055 hw_prod = sblk->status_completion_producer_index;
1056 } else
1057 break;
1058 }
1059
1060 done:
1061 CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
1062
1063 cp->kcq_prod_idx = sw_prod;
1064
1065 cnic_chk_bnx2_pkt_rings(cp);
1066 return status_idx;
1067 }
1068
1069 static void cnic_service_bnx2_msix(unsigned long data)
1070 {
1071 struct cnic_dev *dev = (struct cnic_dev *) data;
1072 struct cnic_local *cp = dev->cnic_priv;
1073 struct status_block_msix *status_blk = cp->bnx2_status_blk;
1074 u32 status_idx = status_blk->status_idx;
1075 u16 hw_prod, sw_prod;
1076 int kcqe_cnt;
1077
1078 cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1079
1080 hw_prod = status_blk->status_completion_producer_index;
1081 sw_prod = cp->kcq_prod_idx;
1082 while (sw_prod != hw_prod) {
1083 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
1084 if (kcqe_cnt == 0)
1085 goto done;
1086
1087 service_kcqes(dev, kcqe_cnt);
1088
1089 /* Tell compiler that status_blk fields can change. */
1090 barrier();
1091 if (status_idx != status_blk->status_idx) {
1092 status_idx = status_blk->status_idx;
1093 cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1094 hw_prod = status_blk->status_completion_producer_index;
1095 } else
1096 break;
1097 }
1098
1099 done:
1100 CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
1101 cp->kcq_prod_idx = sw_prod;
1102
1103 cnic_chk_bnx2_pkt_rings(cp);
1104
1105 cp->last_status_idx = status_idx;
1106 CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
1107 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
1108 }
1109
1110 static irqreturn_t cnic_irq(int irq, void *dev_instance)
1111 {
1112 struct cnic_dev *dev = dev_instance;
1113 struct cnic_local *cp = dev->cnic_priv;
1114 u16 prod = cp->kcq_prod_idx & MAX_KCQ_IDX;
1115
1116 if (cp->ack_int)
1117 cp->ack_int(dev);
1118
1119 prefetch(cp->status_blk);
1120 prefetch(&cp->kcq[KCQ_PG(prod)][KCQ_IDX(prod)]);
1121
1122 if (likely(test_bit(CNIC_F_CNIC_UP, &dev->flags)))
1123 tasklet_schedule(&cp->cnic_irq_task);
1124
1125 return IRQ_HANDLED;
1126 }
1127
1128 static void cnic_ulp_stop(struct cnic_dev *dev)
1129 {
1130 struct cnic_local *cp = dev->cnic_priv;
1131 int if_type;
1132
1133 if (cp->cnic_uinfo)
1134 cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
1135
1136 for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1137 struct cnic_ulp_ops *ulp_ops;
1138
1139 mutex_lock(&cnic_lock);
1140 ulp_ops = cp->ulp_ops[if_type];
1141 if (!ulp_ops) {
1142 mutex_unlock(&cnic_lock);
1143 continue;
1144 }
1145 set_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
1146 mutex_unlock(&cnic_lock);
1147
1148 if (test_and_clear_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1149 ulp_ops->cnic_stop(cp->ulp_handle[if_type]);
1150
1151 clear_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
1152 }
1153 }
1154
1155 static void cnic_ulp_start(struct cnic_dev *dev)
1156 {
1157 struct cnic_local *cp = dev->cnic_priv;
1158 int if_type;
1159
1160 for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1161 struct cnic_ulp_ops *ulp_ops;
1162
1163 mutex_lock(&cnic_lock);
1164 ulp_ops = cp->ulp_ops[if_type];
1165 if (!ulp_ops || !ulp_ops->cnic_start) {
1166 mutex_unlock(&cnic_lock);
1167 continue;
1168 }
1169 set_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
1170 mutex_unlock(&cnic_lock);
1171
1172 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1173 ulp_ops->cnic_start(cp->ulp_handle[if_type]);
1174
1175 clear_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
1176 }
1177 }
1178
1179 static int cnic_ctl(void *data, struct cnic_ctl_info *info)
1180 {
1181 struct cnic_dev *dev = data;
1182
1183 switch (info->cmd) {
1184 case CNIC_CTL_STOP_CMD:
1185 cnic_hold(dev);
1186
1187 cnic_ulp_stop(dev);
1188 cnic_stop_hw(dev);
1189
1190 cnic_put(dev);
1191 break;
1192 case CNIC_CTL_START_CMD:
1193 cnic_hold(dev);
1194
1195 if (!cnic_start_hw(dev))
1196 cnic_ulp_start(dev);
1197
1198 cnic_put(dev);
1199 break;
1200 default:
1201 return -EINVAL;
1202 }
1203 return 0;
1204 }
1205
1206 static void cnic_ulp_init(struct cnic_dev *dev)
1207 {
1208 int i;
1209 struct cnic_local *cp = dev->cnic_priv;
1210
1211 for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1212 struct cnic_ulp_ops *ulp_ops;
1213
1214 mutex_lock(&cnic_lock);
1215 ulp_ops = cnic_ulp_tbl[i];
1216 if (!ulp_ops || !ulp_ops->cnic_init) {
1217 mutex_unlock(&cnic_lock);
1218 continue;
1219 }
1220 ulp_get(ulp_ops);
1221 mutex_unlock(&cnic_lock);
1222
1223 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1224 ulp_ops->cnic_init(dev);
1225
1226 ulp_put(ulp_ops);
1227 }
1228 }
1229
1230 static void cnic_ulp_exit(struct cnic_dev *dev)
1231 {
1232 int i;
1233 struct cnic_local *cp = dev->cnic_priv;
1234
1235 for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1236 struct cnic_ulp_ops *ulp_ops;
1237
1238 mutex_lock(&cnic_lock);
1239 ulp_ops = cnic_ulp_tbl[i];
1240 if (!ulp_ops || !ulp_ops->cnic_exit) {
1241 mutex_unlock(&cnic_lock);
1242 continue;
1243 }
1244 ulp_get(ulp_ops);
1245 mutex_unlock(&cnic_lock);
1246
1247 if (test_and_clear_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1248 ulp_ops->cnic_exit(dev);
1249
1250 ulp_put(ulp_ops);
1251 }
1252 }
1253
1254 static int cnic_cm_offload_pg(struct cnic_sock *csk)
1255 {
1256 struct cnic_dev *dev = csk->dev;
1257 struct l4_kwq_offload_pg *l4kwqe;
1258 struct kwqe *wqes[1];
1259
1260 l4kwqe = (struct l4_kwq_offload_pg *) &csk->kwqe1;
1261 memset(l4kwqe, 0, sizeof(*l4kwqe));
1262 wqes[0] = (struct kwqe *) l4kwqe;
1263
1264 l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_OFFLOAD_PG;
1265 l4kwqe->flags =
1266 L4_LAYER_CODE << L4_KWQ_OFFLOAD_PG_LAYER_CODE_SHIFT;
1267 l4kwqe->l2hdr_nbytes = ETH_HLEN;
1268
1269 l4kwqe->da0 = csk->ha[0];
1270 l4kwqe->da1 = csk->ha[1];
1271 l4kwqe->da2 = csk->ha[2];
1272 l4kwqe->da3 = csk->ha[3];
1273 l4kwqe->da4 = csk->ha[4];
1274 l4kwqe->da5 = csk->ha[5];
1275
1276 l4kwqe->sa0 = dev->mac_addr[0];
1277 l4kwqe->sa1 = dev->mac_addr[1];
1278 l4kwqe->sa2 = dev->mac_addr[2];
1279 l4kwqe->sa3 = dev->mac_addr[3];
1280 l4kwqe->sa4 = dev->mac_addr[4];
1281 l4kwqe->sa5 = dev->mac_addr[5];
1282
1283 l4kwqe->etype = ETH_P_IP;
1284 l4kwqe->ipid_count = DEF_IPID_COUNT;
1285 l4kwqe->host_opaque = csk->l5_cid;
1286
1287 if (csk->vlan_id) {
1288 l4kwqe->pg_flags |= L4_KWQ_OFFLOAD_PG_VLAN_TAGGING;
1289 l4kwqe->vlan_tag = csk->vlan_id;
1290 l4kwqe->l2hdr_nbytes += 4;
1291 }
1292
1293 return dev->submit_kwqes(dev, wqes, 1);
1294 }
1295
1296 static int cnic_cm_update_pg(struct cnic_sock *csk)
1297 {
1298 struct cnic_dev *dev = csk->dev;
1299 struct l4_kwq_update_pg *l4kwqe;
1300 struct kwqe *wqes[1];
1301
1302 l4kwqe = (struct l4_kwq_update_pg *) &csk->kwqe1;
1303 memset(l4kwqe, 0, sizeof(*l4kwqe));
1304 wqes[0] = (struct kwqe *) l4kwqe;
1305
1306 l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPDATE_PG;
1307 l4kwqe->flags =
1308 L4_LAYER_CODE << L4_KWQ_UPDATE_PG_LAYER_CODE_SHIFT;
1309 l4kwqe->pg_cid = csk->pg_cid;
1310
1311 l4kwqe->da0 = csk->ha[0];
1312 l4kwqe->da1 = csk->ha[1];
1313 l4kwqe->da2 = csk->ha[2];
1314 l4kwqe->da3 = csk->ha[3];
1315 l4kwqe->da4 = csk->ha[4];
1316 l4kwqe->da5 = csk->ha[5];
1317
1318 l4kwqe->pg_host_opaque = csk->l5_cid;
1319 l4kwqe->pg_valids = L4_KWQ_UPDATE_PG_VALIDS_DA;
1320
1321 return dev->submit_kwqes(dev, wqes, 1);
1322 }
1323
1324 static int cnic_cm_upload_pg(struct cnic_sock *csk)
1325 {
1326 struct cnic_dev *dev = csk->dev;
1327 struct l4_kwq_upload *l4kwqe;
1328 struct kwqe *wqes[1];
1329
1330 l4kwqe = (struct l4_kwq_upload *) &csk->kwqe1;
1331 memset(l4kwqe, 0, sizeof(*l4kwqe));
1332 wqes[0] = (struct kwqe *) l4kwqe;
1333
1334 l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPLOAD_PG;
1335 l4kwqe->flags =
1336 L4_LAYER_CODE << L4_KWQ_UPLOAD_LAYER_CODE_SHIFT;
1337 l4kwqe->cid = csk->pg_cid;
1338
1339 return dev->submit_kwqes(dev, wqes, 1);
1340 }
1341
1342 static int cnic_cm_conn_req(struct cnic_sock *csk)
1343 {
1344 struct cnic_dev *dev = csk->dev;
1345 struct l4_kwq_connect_req1 *l4kwqe1;
1346 struct l4_kwq_connect_req2 *l4kwqe2;
1347 struct l4_kwq_connect_req3 *l4kwqe3;
1348 struct kwqe *wqes[3];
1349 u8 tcp_flags = 0;
1350 int num_wqes = 2;
1351
1352 l4kwqe1 = (struct l4_kwq_connect_req1 *) &csk->kwqe1;
1353 l4kwqe2 = (struct l4_kwq_connect_req2 *) &csk->kwqe2;
1354 l4kwqe3 = (struct l4_kwq_connect_req3 *) &csk->kwqe3;
1355 memset(l4kwqe1, 0, sizeof(*l4kwqe1));
1356 memset(l4kwqe2, 0, sizeof(*l4kwqe2));
1357 memset(l4kwqe3, 0, sizeof(*l4kwqe3));
1358
1359 l4kwqe3->op_code = L4_KWQE_OPCODE_VALUE_CONNECT3;
1360 l4kwqe3->flags =
1361 L4_LAYER_CODE << L4_KWQ_CONNECT_REQ3_LAYER_CODE_SHIFT;
1362 l4kwqe3->ka_timeout = csk->ka_timeout;
1363 l4kwqe3->ka_interval = csk->ka_interval;
1364 l4kwqe3->ka_max_probe_count = csk->ka_max_probe_count;
1365 l4kwqe3->tos = csk->tos;
1366 l4kwqe3->ttl = csk->ttl;
1367 l4kwqe3->snd_seq_scale = csk->snd_seq_scale;
1368 l4kwqe3->pmtu = csk->mtu;
1369 l4kwqe3->rcv_buf = csk->rcv_buf;
1370 l4kwqe3->snd_buf = csk->snd_buf;
1371 l4kwqe3->seed = csk->seed;
1372
1373 wqes[0] = (struct kwqe *) l4kwqe1;
1374 if (test_bit(SK_F_IPV6, &csk->flags)) {
1375 wqes[1] = (struct kwqe *) l4kwqe2;
1376 wqes[2] = (struct kwqe *) l4kwqe3;
1377 num_wqes = 3;
1378
1379 l4kwqe1->conn_flags = L4_KWQ_CONNECT_REQ1_IP_V6;
1380 l4kwqe2->op_code = L4_KWQE_OPCODE_VALUE_CONNECT2;
1381 l4kwqe2->flags =
1382 L4_KWQ_CONNECT_REQ2_LINKED_WITH_NEXT |
1383 L4_LAYER_CODE << L4_KWQ_CONNECT_REQ2_LAYER_CODE_SHIFT;
1384 l4kwqe2->src_ip_v6_2 = be32_to_cpu(csk->src_ip[1]);
1385 l4kwqe2->src_ip_v6_3 = be32_to_cpu(csk->src_ip[2]);
1386 l4kwqe2->src_ip_v6_4 = be32_to_cpu(csk->src_ip[3]);
1387 l4kwqe2->dst_ip_v6_2 = be32_to_cpu(csk->dst_ip[1]);
1388 l4kwqe2->dst_ip_v6_3 = be32_to_cpu(csk->dst_ip[2]);
1389 l4kwqe2->dst_ip_v6_4 = be32_to_cpu(csk->dst_ip[3]);
1390 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct ipv6hdr) -
1391 sizeof(struct tcphdr);
1392 } else {
1393 wqes[1] = (struct kwqe *) l4kwqe3;
1394 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct iphdr) -
1395 sizeof(struct tcphdr);
1396 }
1397
1398 l4kwqe1->op_code = L4_KWQE_OPCODE_VALUE_CONNECT1;
1399 l4kwqe1->flags =
1400 (L4_LAYER_CODE << L4_KWQ_CONNECT_REQ1_LAYER_CODE_SHIFT) |
1401 L4_KWQ_CONNECT_REQ3_LINKED_WITH_NEXT;
1402 l4kwqe1->cid = csk->cid;
1403 l4kwqe1->pg_cid = csk->pg_cid;
1404 l4kwqe1->src_ip = be32_to_cpu(csk->src_ip[0]);
1405 l4kwqe1->dst_ip = be32_to_cpu(csk->dst_ip[0]);
1406 l4kwqe1->src_port = be16_to_cpu(csk->src_port);
1407 l4kwqe1->dst_port = be16_to_cpu(csk->dst_port);
1408 if (csk->tcp_flags & SK_TCP_NO_DELAY_ACK)
1409 tcp_flags |= L4_KWQ_CONNECT_REQ1_NO_DELAY_ACK;
1410 if (csk->tcp_flags & SK_TCP_KEEP_ALIVE)
1411 tcp_flags |= L4_KWQ_CONNECT_REQ1_KEEP_ALIVE;
1412 if (csk->tcp_flags & SK_TCP_NAGLE)
1413 tcp_flags |= L4_KWQ_CONNECT_REQ1_NAGLE_ENABLE;
1414 if (csk->tcp_flags & SK_TCP_TIMESTAMP)
1415 tcp_flags |= L4_KWQ_CONNECT_REQ1_TIME_STAMP;
1416 if (csk->tcp_flags & SK_TCP_SACK)
1417 tcp_flags |= L4_KWQ_CONNECT_REQ1_SACK;
1418 if (csk->tcp_flags & SK_TCP_SEG_SCALING)
1419 tcp_flags |= L4_KWQ_CONNECT_REQ1_SEG_SCALING;
1420
1421 l4kwqe1->tcp_flags = tcp_flags;
1422
1423 return dev->submit_kwqes(dev, wqes, num_wqes);
1424 }
1425
1426 static int cnic_cm_close_req(struct cnic_sock *csk)
1427 {
1428 struct cnic_dev *dev = csk->dev;
1429 struct l4_kwq_close_req *l4kwqe;
1430 struct kwqe *wqes[1];
1431
1432 l4kwqe = (struct l4_kwq_close_req *) &csk->kwqe2;
1433 memset(l4kwqe, 0, sizeof(*l4kwqe));
1434 wqes[0] = (struct kwqe *) l4kwqe;
1435
1436 l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_CLOSE;
1437 l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_CLOSE_REQ_LAYER_CODE_SHIFT;
1438 l4kwqe->cid = csk->cid;
1439
1440 return dev->submit_kwqes(dev, wqes, 1);
1441 }
1442
1443 static int cnic_cm_abort_req(struct cnic_sock *csk)
1444 {
1445 struct cnic_dev *dev = csk->dev;
1446 struct l4_kwq_reset_req *l4kwqe;
1447 struct kwqe *wqes[1];
1448
1449 l4kwqe = (struct l4_kwq_reset_req *) &csk->kwqe2;
1450 memset(l4kwqe, 0, sizeof(*l4kwqe));
1451 wqes[0] = (struct kwqe *) l4kwqe;
1452
1453 l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_RESET;
1454 l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_RESET_REQ_LAYER_CODE_SHIFT;
1455 l4kwqe->cid = csk->cid;
1456
1457 return dev->submit_kwqes(dev, wqes, 1);
1458 }
1459
1460 static int cnic_cm_create(struct cnic_dev *dev, int ulp_type, u32 cid,
1461 u32 l5_cid, struct cnic_sock **csk, void *context)
1462 {
1463 struct cnic_local *cp = dev->cnic_priv;
1464 struct cnic_sock *csk1;
1465
1466 if (l5_cid >= MAX_CM_SK_TBL_SZ)
1467 return -EINVAL;
1468
1469 csk1 = &cp->csk_tbl[l5_cid];
1470 if (atomic_read(&csk1->ref_count))
1471 return -EAGAIN;
1472
1473 if (test_and_set_bit(SK_F_INUSE, &csk1->flags))
1474 return -EBUSY;
1475
1476 csk1->dev = dev;
1477 csk1->cid = cid;
1478 csk1->l5_cid = l5_cid;
1479 csk1->ulp_type = ulp_type;
1480 csk1->context = context;
1481
1482 csk1->ka_timeout = DEF_KA_TIMEOUT;
1483 csk1->ka_interval = DEF_KA_INTERVAL;
1484 csk1->ka_max_probe_count = DEF_KA_MAX_PROBE_COUNT;
1485 csk1->tos = DEF_TOS;
1486 csk1->ttl = DEF_TTL;
1487 csk1->snd_seq_scale = DEF_SND_SEQ_SCALE;
1488 csk1->rcv_buf = DEF_RCV_BUF;
1489 csk1->snd_buf = DEF_SND_BUF;
1490 csk1->seed = DEF_SEED;
1491
1492 *csk = csk1;
1493 return 0;
1494 }
1495
1496 static void cnic_cm_cleanup(struct cnic_sock *csk)
1497 {
1498 if (csk->src_port) {
1499 struct cnic_dev *dev = csk->dev;
1500 struct cnic_local *cp = dev->cnic_priv;
1501
1502 cnic_free_id(&cp->csk_port_tbl, csk->src_port);
1503 csk->src_port = 0;
1504 }
1505 }
1506
1507 static void cnic_close_conn(struct cnic_sock *csk)
1508 {
1509 if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags)) {
1510 cnic_cm_upload_pg(csk);
1511 clear_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1512 }
1513 cnic_cm_cleanup(csk);
1514 }
1515
1516 static int cnic_cm_destroy(struct cnic_sock *csk)
1517 {
1518 if (!cnic_in_use(csk))
1519 return -EINVAL;
1520
1521 csk_hold(csk);
1522 clear_bit(SK_F_INUSE, &csk->flags);
1523 smp_mb__after_clear_bit();
1524 while (atomic_read(&csk->ref_count) != 1)
1525 msleep(1);
1526 cnic_cm_cleanup(csk);
1527
1528 csk->flags = 0;
1529 csk_put(csk);
1530 return 0;
1531 }
1532
1533 static inline u16 cnic_get_vlan(struct net_device *dev,
1534 struct net_device **vlan_dev)
1535 {
1536 if (dev->priv_flags & IFF_802_1Q_VLAN) {
1537 *vlan_dev = vlan_dev_real_dev(dev);
1538 return vlan_dev_vlan_id(dev);
1539 }
1540 *vlan_dev = dev;
1541 return 0;
1542 }
1543
1544 static int cnic_get_v4_route(struct sockaddr_in *dst_addr,
1545 struct dst_entry **dst)
1546 {
1547 #if defined(CONFIG_INET)
1548 struct flowi fl;
1549 int err;
1550 struct rtable *rt;
1551
1552 memset(&fl, 0, sizeof(fl));
1553 fl.nl_u.ip4_u.daddr = dst_addr->sin_addr.s_addr;
1554
1555 err = ip_route_output_key(&init_net, &rt, &fl);
1556 if (!err)
1557 *dst = &rt->u.dst;
1558 return err;
1559 #else
1560 return -ENETUNREACH;
1561 #endif
1562 }
1563
1564 static int cnic_get_v6_route(struct sockaddr_in6 *dst_addr,
1565 struct dst_entry **dst)
1566 {
1567 #if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
1568 struct flowi fl;
1569
1570 memset(&fl, 0, sizeof(fl));
1571 ipv6_addr_copy(&fl.fl6_dst, &dst_addr->sin6_addr);
1572 if (ipv6_addr_type(&fl.fl6_dst) & IPV6_ADDR_LINKLOCAL)
1573 fl.oif = dst_addr->sin6_scope_id;
1574
1575 *dst = ip6_route_output(&init_net, NULL, &fl);
1576 if (*dst)
1577 return 0;
1578 #endif
1579
1580 return -ENETUNREACH;
1581 }
1582
1583 static struct cnic_dev *cnic_cm_select_dev(struct sockaddr_in *dst_addr,
1584 int ulp_type)
1585 {
1586 struct cnic_dev *dev = NULL;
1587 struct dst_entry *dst;
1588 struct net_device *netdev = NULL;
1589 int err = -ENETUNREACH;
1590
1591 if (dst_addr->sin_family == AF_INET)
1592 err = cnic_get_v4_route(dst_addr, &dst);
1593 else if (dst_addr->sin_family == AF_INET6) {
1594 struct sockaddr_in6 *dst_addr6 =
1595 (struct sockaddr_in6 *) dst_addr;
1596
1597 err = cnic_get_v6_route(dst_addr6, &dst);
1598 } else
1599 return NULL;
1600
1601 if (err)
1602 return NULL;
1603
1604 if (!dst->dev)
1605 goto done;
1606
1607 cnic_get_vlan(dst->dev, &netdev);
1608
1609 dev = cnic_from_netdev(netdev);
1610
1611 done:
1612 dst_release(dst);
1613 if (dev)
1614 cnic_put(dev);
1615 return dev;
1616 }
1617
1618 static int cnic_resolve_addr(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1619 {
1620 struct cnic_dev *dev = csk->dev;
1621 struct cnic_local *cp = dev->cnic_priv;
1622
1623 return cnic_send_nlmsg(cp, ISCSI_KEVENT_PATH_REQ, csk);
1624 }
1625
1626 static int cnic_get_route(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1627 {
1628 struct cnic_dev *dev = csk->dev;
1629 struct cnic_local *cp = dev->cnic_priv;
1630 int is_v6, err, rc = -ENETUNREACH;
1631 struct dst_entry *dst;
1632 struct net_device *realdev;
1633 u32 local_port;
1634
1635 if (saddr->local.v6.sin6_family == AF_INET6 &&
1636 saddr->remote.v6.sin6_family == AF_INET6)
1637 is_v6 = 1;
1638 else if (saddr->local.v4.sin_family == AF_INET &&
1639 saddr->remote.v4.sin_family == AF_INET)
1640 is_v6 = 0;
1641 else
1642 return -EINVAL;
1643
1644 clear_bit(SK_F_IPV6, &csk->flags);
1645
1646 if (is_v6) {
1647 #if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
1648 set_bit(SK_F_IPV6, &csk->flags);
1649 err = cnic_get_v6_route(&saddr->remote.v6, &dst);
1650 if (err)
1651 return err;
1652
1653 if (!dst || dst->error || !dst->dev)
1654 goto err_out;
1655
1656 memcpy(&csk->dst_ip[0], &saddr->remote.v6.sin6_addr,
1657 sizeof(struct in6_addr));
1658 csk->dst_port = saddr->remote.v6.sin6_port;
1659 local_port = saddr->local.v6.sin6_port;
1660 #else
1661 return rc;
1662 #endif
1663
1664 } else {
1665 err = cnic_get_v4_route(&saddr->remote.v4, &dst);
1666 if (err)
1667 return err;
1668
1669 if (!dst || dst->error || !dst->dev)
1670 goto err_out;
1671
1672 csk->dst_ip[0] = saddr->remote.v4.sin_addr.s_addr;
1673 csk->dst_port = saddr->remote.v4.sin_port;
1674 local_port = saddr->local.v4.sin_port;
1675 }
1676
1677 csk->vlan_id = cnic_get_vlan(dst->dev, &realdev);
1678 if (realdev != dev->netdev)
1679 goto err_out;
1680
1681 if (local_port >= CNIC_LOCAL_PORT_MIN &&
1682 local_port < CNIC_LOCAL_PORT_MAX) {
1683 if (cnic_alloc_id(&cp->csk_port_tbl, local_port))
1684 local_port = 0;
1685 } else
1686 local_port = 0;
1687
1688 if (!local_port) {
1689 local_port = cnic_alloc_new_id(&cp->csk_port_tbl);
1690 if (local_port == -1) {
1691 rc = -ENOMEM;
1692 goto err_out;
1693 }
1694 }
1695 csk->src_port = local_port;
1696
1697 csk->mtu = dst_mtu(dst);
1698 rc = 0;
1699
1700 err_out:
1701 dst_release(dst);
1702 return rc;
1703 }
1704
1705 static void cnic_init_csk_state(struct cnic_sock *csk)
1706 {
1707 csk->state = 0;
1708 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1709 clear_bit(SK_F_CLOSING, &csk->flags);
1710 }
1711
1712 static int cnic_cm_connect(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1713 {
1714 int err = 0;
1715
1716 if (!cnic_in_use(csk))
1717 return -EINVAL;
1718
1719 if (test_and_set_bit(SK_F_CONNECT_START, &csk->flags))
1720 return -EINVAL;
1721
1722 cnic_init_csk_state(csk);
1723
1724 err = cnic_get_route(csk, saddr);
1725 if (err)
1726 goto err_out;
1727
1728 err = cnic_resolve_addr(csk, saddr);
1729 if (!err)
1730 return 0;
1731
1732 err_out:
1733 clear_bit(SK_F_CONNECT_START, &csk->flags);
1734 return err;
1735 }
1736
1737 static int cnic_cm_abort(struct cnic_sock *csk)
1738 {
1739 struct cnic_local *cp = csk->dev->cnic_priv;
1740 u32 opcode;
1741
1742 if (!cnic_in_use(csk))
1743 return -EINVAL;
1744
1745 if (cnic_abort_prep(csk))
1746 return cnic_cm_abort_req(csk);
1747
1748 /* Getting here means that we haven't started connect, or
1749 * connect was not successful.
1750 */
1751
1752 csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
1753 if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1754 opcode = csk->state;
1755 else
1756 opcode = L5CM_RAMROD_CMD_ID_TERMINATE_OFFLOAD;
1757 cp->close_conn(csk, opcode);
1758
1759 return 0;
1760 }
1761
1762 static int cnic_cm_close(struct cnic_sock *csk)
1763 {
1764 if (!cnic_in_use(csk))
1765 return -EINVAL;
1766
1767 if (cnic_close_prep(csk)) {
1768 csk->state = L4_KCQE_OPCODE_VALUE_CLOSE_COMP;
1769 return cnic_cm_close_req(csk);
1770 }
1771 return 0;
1772 }
1773
1774 static void cnic_cm_upcall(struct cnic_local *cp, struct cnic_sock *csk,
1775 u8 opcode)
1776 {
1777 struct cnic_ulp_ops *ulp_ops;
1778 int ulp_type = csk->ulp_type;
1779
1780 rcu_read_lock();
1781 ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
1782 if (ulp_ops) {
1783 if (opcode == L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE)
1784 ulp_ops->cm_connect_complete(csk);
1785 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)
1786 ulp_ops->cm_close_complete(csk);
1787 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED)
1788 ulp_ops->cm_remote_abort(csk);
1789 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_COMP)
1790 ulp_ops->cm_abort_complete(csk);
1791 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED)
1792 ulp_ops->cm_remote_close(csk);
1793 }
1794 rcu_read_unlock();
1795 }
1796
1797 static int cnic_cm_set_pg(struct cnic_sock *csk)
1798 {
1799 if (cnic_offld_prep(csk)) {
1800 if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1801 cnic_cm_update_pg(csk);
1802 else
1803 cnic_cm_offload_pg(csk);
1804 }
1805 return 0;
1806 }
1807
1808 static void cnic_cm_process_offld_pg(struct cnic_dev *dev, struct l4_kcq *kcqe)
1809 {
1810 struct cnic_local *cp = dev->cnic_priv;
1811 u32 l5_cid = kcqe->pg_host_opaque;
1812 u8 opcode = kcqe->op_code;
1813 struct cnic_sock *csk = &cp->csk_tbl[l5_cid];
1814
1815 csk_hold(csk);
1816 if (!cnic_in_use(csk))
1817 goto done;
1818
1819 if (opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1820 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1821 goto done;
1822 }
1823 csk->pg_cid = kcqe->pg_cid;
1824 set_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1825 cnic_cm_conn_req(csk);
1826
1827 done:
1828 csk_put(csk);
1829 }
1830
1831 static void cnic_cm_process_kcqe(struct cnic_dev *dev, struct kcqe *kcqe)
1832 {
1833 struct cnic_local *cp = dev->cnic_priv;
1834 struct l4_kcq *l4kcqe = (struct l4_kcq *) kcqe;
1835 u8 opcode = l4kcqe->op_code;
1836 u32 l5_cid;
1837 struct cnic_sock *csk;
1838
1839 if (opcode == L4_KCQE_OPCODE_VALUE_OFFLOAD_PG ||
1840 opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1841 cnic_cm_process_offld_pg(dev, l4kcqe);
1842 return;
1843 }
1844
1845 l5_cid = l4kcqe->conn_id;
1846 if (opcode & 0x80)
1847 l5_cid = l4kcqe->cid;
1848 if (l5_cid >= MAX_CM_SK_TBL_SZ)
1849 return;
1850
1851 csk = &cp->csk_tbl[l5_cid];
1852 csk_hold(csk);
1853
1854 if (!cnic_in_use(csk)) {
1855 csk_put(csk);
1856 return;
1857 }
1858
1859 switch (opcode) {
1860 case L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE:
1861 if (l4kcqe->status == 0)
1862 set_bit(SK_F_OFFLD_COMPLETE, &csk->flags);
1863
1864 smp_mb__before_clear_bit();
1865 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1866 cnic_cm_upcall(cp, csk, opcode);
1867 break;
1868
1869 case L4_KCQE_OPCODE_VALUE_RESET_RECEIVED:
1870 if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags))
1871 csk->state = opcode;
1872 /* fall through */
1873 case L4_KCQE_OPCODE_VALUE_CLOSE_COMP:
1874 case L4_KCQE_OPCODE_VALUE_RESET_COMP:
1875 cp->close_conn(csk, opcode);
1876 break;
1877
1878 case L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED:
1879 cnic_cm_upcall(cp, csk, opcode);
1880 break;
1881 }
1882 csk_put(csk);
1883 }
1884
1885 static void cnic_cm_indicate_kcqe(void *data, struct kcqe *kcqe[], u32 num)
1886 {
1887 struct cnic_dev *dev = data;
1888 int i;
1889
1890 for (i = 0; i < num; i++)
1891 cnic_cm_process_kcqe(dev, kcqe[i]);
1892 }
1893
1894 static struct cnic_ulp_ops cm_ulp_ops = {
1895 .indicate_kcqes = cnic_cm_indicate_kcqe,
1896 };
1897
1898 static void cnic_cm_free_mem(struct cnic_dev *dev)
1899 {
1900 struct cnic_local *cp = dev->cnic_priv;
1901
1902 kfree(cp->csk_tbl);
1903 cp->csk_tbl = NULL;
1904 cnic_free_id_tbl(&cp->csk_port_tbl);
1905 }
1906
1907 static int cnic_cm_alloc_mem(struct cnic_dev *dev)
1908 {
1909 struct cnic_local *cp = dev->cnic_priv;
1910
1911 cp->csk_tbl = kzalloc(sizeof(struct cnic_sock) * MAX_CM_SK_TBL_SZ,
1912 GFP_KERNEL);
1913 if (!cp->csk_tbl)
1914 return -ENOMEM;
1915
1916 if (cnic_init_id_tbl(&cp->csk_port_tbl, CNIC_LOCAL_PORT_RANGE,
1917 CNIC_LOCAL_PORT_MIN)) {
1918 cnic_cm_free_mem(dev);
1919 return -ENOMEM;
1920 }
1921 return 0;
1922 }
1923
1924 static int cnic_ready_to_close(struct cnic_sock *csk, u32 opcode)
1925 {
1926 if ((opcode == csk->state) ||
1927 (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED &&
1928 csk->state == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)) {
1929 if (!test_and_set_bit(SK_F_CLOSING, &csk->flags))
1930 return 1;
1931 }
1932 return 0;
1933 }
1934
1935 static void cnic_close_bnx2_conn(struct cnic_sock *csk, u32 opcode)
1936 {
1937 struct cnic_dev *dev = csk->dev;
1938 struct cnic_local *cp = dev->cnic_priv;
1939
1940 clear_bit(SK_F_CONNECT_START, &csk->flags);
1941 if (cnic_ready_to_close(csk, opcode)) {
1942 cnic_close_conn(csk);
1943 cnic_cm_upcall(cp, csk, opcode);
1944 }
1945 }
1946
1947 static void cnic_cm_stop_bnx2_hw(struct cnic_dev *dev)
1948 {
1949 }
1950
1951 static int cnic_cm_init_bnx2_hw(struct cnic_dev *dev)
1952 {
1953 u32 seed;
1954
1955 get_random_bytes(&seed, 4);
1956 cnic_ctx_wr(dev, 45, 0, seed);
1957 return 0;
1958 }
1959
1960 static int cnic_cm_open(struct cnic_dev *dev)
1961 {
1962 struct cnic_local *cp = dev->cnic_priv;
1963 int err;
1964
1965 err = cnic_cm_alloc_mem(dev);
1966 if (err)
1967 return err;
1968
1969 err = cp->start_cm(dev);
1970
1971 if (err)
1972 goto err_out;
1973
1974 dev->cm_create = cnic_cm_create;
1975 dev->cm_destroy = cnic_cm_destroy;
1976 dev->cm_connect = cnic_cm_connect;
1977 dev->cm_abort = cnic_cm_abort;
1978 dev->cm_close = cnic_cm_close;
1979 dev->cm_select_dev = cnic_cm_select_dev;
1980
1981 cp->ulp_handle[CNIC_ULP_L4] = dev;
1982 rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], &cm_ulp_ops);
1983 return 0;
1984
1985 err_out:
1986 cnic_cm_free_mem(dev);
1987 return err;
1988 }
1989
1990 static int cnic_cm_shutdown(struct cnic_dev *dev)
1991 {
1992 struct cnic_local *cp = dev->cnic_priv;
1993 int i;
1994
1995 cp->stop_cm(dev);
1996
1997 if (!cp->csk_tbl)
1998 return 0;
1999
2000 for (i = 0; i < MAX_CM_SK_TBL_SZ; i++) {
2001 struct cnic_sock *csk = &cp->csk_tbl[i];
2002
2003 clear_bit(SK_F_INUSE, &csk->flags);
2004 cnic_cm_cleanup(csk);
2005 }
2006 cnic_cm_free_mem(dev);
2007
2008 return 0;
2009 }
2010
2011 static void cnic_init_context(struct cnic_dev *dev, u32 cid)
2012 {
2013 struct cnic_local *cp = dev->cnic_priv;
2014 u32 cid_addr;
2015 int i;
2016
2017 if (CHIP_NUM(cp) == CHIP_NUM_5709)
2018 return;
2019
2020 cid_addr = GET_CID_ADDR(cid);
2021
2022 for (i = 0; i < CTX_SIZE; i += 4)
2023 cnic_ctx_wr(dev, cid_addr, i, 0);
2024 }
2025
2026 static int cnic_setup_5709_context(struct cnic_dev *dev, int valid)
2027 {
2028 struct cnic_local *cp = dev->cnic_priv;
2029 int ret = 0, i;
2030 u32 valid_bit = valid ? BNX2_CTX_HOST_PAGE_TBL_DATA0_VALID : 0;
2031
2032 if (CHIP_NUM(cp) != CHIP_NUM_5709)
2033 return 0;
2034
2035 for (i = 0; i < cp->ctx_blks; i++) {
2036 int j;
2037 u32 idx = cp->ctx_arr[i].cid / cp->cids_per_blk;
2038 u32 val;
2039
2040 memset(cp->ctx_arr[i].ctx, 0, BCM_PAGE_SIZE);
2041
2042 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA0,
2043 (cp->ctx_arr[i].mapping & 0xffffffff) | valid_bit);
2044 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA1,
2045 (u64) cp->ctx_arr[i].mapping >> 32);
2046 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL, idx |
2047 BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ);
2048 for (j = 0; j < 10; j++) {
2049
2050 val = CNIC_RD(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL);
2051 if (!(val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ))
2052 break;
2053 udelay(5);
2054 }
2055 if (val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ) {
2056 ret = -EBUSY;
2057 break;
2058 }
2059 }
2060 return ret;
2061 }
2062
2063 static void cnic_free_irq(struct cnic_dev *dev)
2064 {
2065 struct cnic_local *cp = dev->cnic_priv;
2066 struct cnic_eth_dev *ethdev = cp->ethdev;
2067
2068 if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2069 cp->disable_int_sync(dev);
2070 tasklet_disable(&cp->cnic_irq_task);
2071 free_irq(ethdev->irq_arr[0].vector, dev);
2072 }
2073 }
2074
2075 static int cnic_init_bnx2_irq(struct cnic_dev *dev)
2076 {
2077 struct cnic_local *cp = dev->cnic_priv;
2078 struct cnic_eth_dev *ethdev = cp->ethdev;
2079
2080 if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2081 int err, i = 0;
2082 int sblk_num = cp->status_blk_num;
2083 u32 base = ((sblk_num - 1) * BNX2_HC_SB_CONFIG_SIZE) +
2084 BNX2_HC_SB_CONFIG_1;
2085
2086 CNIC_WR(dev, base, BNX2_HC_SB_CONFIG_1_ONE_SHOT);
2087
2088 CNIC_WR(dev, base + BNX2_HC_COMP_PROD_TRIP_OFF, (2 << 16) | 8);
2089 CNIC_WR(dev, base + BNX2_HC_COM_TICKS_OFF, (64 << 16) | 220);
2090 CNIC_WR(dev, base + BNX2_HC_CMD_TICKS_OFF, (64 << 16) | 220);
2091
2092 cp->bnx2_status_blk = cp->status_blk;
2093 cp->last_status_idx = cp->bnx2_status_blk->status_idx;
2094 tasklet_init(&cp->cnic_irq_task, &cnic_service_bnx2_msix,
2095 (unsigned long) dev);
2096 err = request_irq(ethdev->irq_arr[0].vector, cnic_irq, 0,
2097 "cnic", dev);
2098 if (err) {
2099 tasklet_disable(&cp->cnic_irq_task);
2100 return err;
2101 }
2102 while (cp->bnx2_status_blk->status_completion_producer_index &&
2103 i < 10) {
2104 CNIC_WR(dev, BNX2_HC_COALESCE_NOW,
2105 1 << (11 + sblk_num));
2106 udelay(10);
2107 i++;
2108 barrier();
2109 }
2110 if (cp->bnx2_status_blk->status_completion_producer_index) {
2111 cnic_free_irq(dev);
2112 goto failed;
2113 }
2114
2115 } else {
2116 struct status_block *sblk = cp->status_blk;
2117 u32 hc_cmd = CNIC_RD(dev, BNX2_HC_COMMAND);
2118 int i = 0;
2119
2120 while (sblk->status_completion_producer_index && i < 10) {
2121 CNIC_WR(dev, BNX2_HC_COMMAND,
2122 hc_cmd | BNX2_HC_COMMAND_COAL_NOW_WO_INT);
2123 udelay(10);
2124 i++;
2125 barrier();
2126 }
2127 if (sblk->status_completion_producer_index)
2128 goto failed;
2129
2130 }
2131 return 0;
2132
2133 failed:
2134 printk(KERN_ERR PFX "%s: " "KCQ index not resetting to 0.\n",
2135 dev->netdev->name);
2136 return -EBUSY;
2137 }
2138
2139 static void cnic_enable_bnx2_int(struct cnic_dev *dev)
2140 {
2141 struct cnic_local *cp = dev->cnic_priv;
2142 struct cnic_eth_dev *ethdev = cp->ethdev;
2143
2144 if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2145 return;
2146
2147 CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2148 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
2149 }
2150
2151 static void cnic_disable_bnx2_int_sync(struct cnic_dev *dev)
2152 {
2153 struct cnic_local *cp = dev->cnic_priv;
2154 struct cnic_eth_dev *ethdev = cp->ethdev;
2155
2156 if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2157 return;
2158
2159 CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2160 BNX2_PCICFG_INT_ACK_CMD_MASK_INT);
2161 CNIC_RD(dev, BNX2_PCICFG_INT_ACK_CMD);
2162 synchronize_irq(ethdev->irq_arr[0].vector);
2163 }
2164
2165 static void cnic_init_bnx2_tx_ring(struct cnic_dev *dev)
2166 {
2167 struct cnic_local *cp = dev->cnic_priv;
2168 struct cnic_eth_dev *ethdev = cp->ethdev;
2169 u32 cid_addr, tx_cid, sb_id;
2170 u32 val, offset0, offset1, offset2, offset3;
2171 int i;
2172 struct tx_bd *txbd;
2173 dma_addr_t buf_map;
2174 struct status_block *s_blk = cp->status_blk;
2175
2176 sb_id = cp->status_blk_num;
2177 tx_cid = 20;
2178 cnic_init_context(dev, tx_cid);
2179 cnic_init_context(dev, tx_cid + 1);
2180 cp->tx_cons_ptr = &s_blk->status_tx_quick_consumer_index2;
2181 if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2182 struct status_block_msix *sblk = cp->status_blk;
2183
2184 tx_cid = TX_TSS_CID + sb_id - 1;
2185 cnic_init_context(dev, tx_cid);
2186 CNIC_WR(dev, BNX2_TSCH_TSS_CFG, (sb_id << 24) |
2187 (TX_TSS_CID << 7));
2188 cp->tx_cons_ptr = &sblk->status_tx_quick_consumer_index;
2189 }
2190 cp->tx_cons = *cp->tx_cons_ptr;
2191
2192 cid_addr = GET_CID_ADDR(tx_cid);
2193 if (CHIP_NUM(cp) == CHIP_NUM_5709) {
2194 u32 cid_addr2 = GET_CID_ADDR(tx_cid + 4) + 0x40;
2195
2196 for (i = 0; i < PHY_CTX_SIZE; i += 4)
2197 cnic_ctx_wr(dev, cid_addr2, i, 0);
2198
2199 offset0 = BNX2_L2CTX_TYPE_XI;
2200 offset1 = BNX2_L2CTX_CMD_TYPE_XI;
2201 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI_XI;
2202 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO_XI;
2203 } else {
2204 offset0 = BNX2_L2CTX_TYPE;
2205 offset1 = BNX2_L2CTX_CMD_TYPE;
2206 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI;
2207 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO;
2208 }
2209 val = BNX2_L2CTX_TYPE_TYPE_L2 | BNX2_L2CTX_TYPE_SIZE_L2;
2210 cnic_ctx_wr(dev, cid_addr, offset0, val);
2211
2212 val = BNX2_L2CTX_CMD_TYPE_TYPE_L2 | (8 << 16);
2213 cnic_ctx_wr(dev, cid_addr, offset1, val);
2214
2215 txbd = (struct tx_bd *) cp->l2_ring;
2216
2217 buf_map = cp->l2_buf_map;
2218 for (i = 0; i < MAX_TX_DESC_CNT; i++, txbd++) {
2219 txbd->tx_bd_haddr_hi = (u64) buf_map >> 32;
2220 txbd->tx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2221 }
2222 val = (u64) cp->l2_ring_map >> 32;
2223 cnic_ctx_wr(dev, cid_addr, offset2, val);
2224 txbd->tx_bd_haddr_hi = val;
2225
2226 val = (u64) cp->l2_ring_map & 0xffffffff;
2227 cnic_ctx_wr(dev, cid_addr, offset3, val);
2228 txbd->tx_bd_haddr_lo = val;
2229 }
2230
2231 static void cnic_init_bnx2_rx_ring(struct cnic_dev *dev)
2232 {
2233 struct cnic_local *cp = dev->cnic_priv;
2234 struct cnic_eth_dev *ethdev = cp->ethdev;
2235 u32 cid_addr, sb_id, val, coal_reg, coal_val;
2236 int i;
2237 struct rx_bd *rxbd;
2238 struct status_block *s_blk = cp->status_blk;
2239
2240 sb_id = cp->status_blk_num;
2241 cnic_init_context(dev, 2);
2242 cp->rx_cons_ptr = &s_blk->status_rx_quick_consumer_index2;
2243 coal_reg = BNX2_HC_COMMAND;
2244 coal_val = CNIC_RD(dev, coal_reg);
2245 if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2246 struct status_block_msix *sblk = cp->status_blk;
2247
2248 cp->rx_cons_ptr = &sblk->status_rx_quick_consumer_index;
2249 coal_reg = BNX2_HC_COALESCE_NOW;
2250 coal_val = 1 << (11 + sb_id);
2251 }
2252 i = 0;
2253 while (!(*cp->rx_cons_ptr != 0) && i < 10) {
2254 CNIC_WR(dev, coal_reg, coal_val);
2255 udelay(10);
2256 i++;
2257 barrier();
2258 }
2259 cp->rx_cons = *cp->rx_cons_ptr;
2260
2261 cid_addr = GET_CID_ADDR(2);
2262 val = BNX2_L2CTX_CTX_TYPE_CTX_BD_CHN_TYPE_VALUE |
2263 BNX2_L2CTX_CTX_TYPE_SIZE_L2 | (0x02 << 8);
2264 cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_CTX_TYPE, val);
2265
2266 if (sb_id == 0)
2267 val = 2 << BNX2_L2CTX_L2_STATUSB_NUM_SHIFT;
2268 else
2269 val = BNX2_L2CTX_L2_STATUSB_NUM(sb_id);
2270 cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_HOST_BDIDX, val);
2271
2272 rxbd = (struct rx_bd *) (cp->l2_ring + BCM_PAGE_SIZE);
2273 for (i = 0; i < MAX_RX_DESC_CNT; i++, rxbd++) {
2274 dma_addr_t buf_map;
2275 int n = (i % cp->l2_rx_ring_size) + 1;
2276
2277 buf_map = cp->l2_buf_map + (n * cp->l2_single_buf_size);
2278 rxbd->rx_bd_len = cp->l2_single_buf_size;
2279 rxbd->rx_bd_flags = RX_BD_FLAGS_START | RX_BD_FLAGS_END;
2280 rxbd->rx_bd_haddr_hi = (u64) buf_map >> 32;
2281 rxbd->rx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2282 }
2283 val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) >> 32;
2284 cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_HI, val);
2285 rxbd->rx_bd_haddr_hi = val;
2286
2287 val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) & 0xffffffff;
2288 cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_LO, val);
2289 rxbd->rx_bd_haddr_lo = val;
2290
2291 val = cnic_reg_rd_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD);
2292 cnic_reg_wr_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD, val | (1 << 2));
2293 }
2294
2295 static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *dev)
2296 {
2297 struct kwqe *wqes[1], l2kwqe;
2298
2299 memset(&l2kwqe, 0, sizeof(l2kwqe));
2300 wqes[0] = &l2kwqe;
2301 l2kwqe.kwqe_op_flag = (L2_LAYER_CODE << KWQE_FLAGS_LAYER_SHIFT) |
2302 (L2_KWQE_OPCODE_VALUE_FLUSH <<
2303 KWQE_OPCODE_SHIFT) | 2;
2304 dev->submit_kwqes(dev, wqes, 1);
2305 }
2306
2307 static void cnic_set_bnx2_mac(struct cnic_dev *dev)
2308 {
2309 struct cnic_local *cp = dev->cnic_priv;
2310 u32 val;
2311
2312 val = cp->func << 2;
2313
2314 cp->shmem_base = cnic_reg_rd_ind(dev, BNX2_SHM_HDR_ADDR_0 + val);
2315
2316 val = cnic_reg_rd_ind(dev, cp->shmem_base +
2317 BNX2_PORT_HW_CFG_ISCSI_MAC_UPPER);
2318 dev->mac_addr[0] = (u8) (val >> 8);
2319 dev->mac_addr[1] = (u8) val;
2320
2321 CNIC_WR(dev, BNX2_EMAC_MAC_MATCH4, val);
2322
2323 val = cnic_reg_rd_ind(dev, cp->shmem_base +
2324 BNX2_PORT_HW_CFG_ISCSI_MAC_LOWER);
2325 dev->mac_addr[2] = (u8) (val >> 24);
2326 dev->mac_addr[3] = (u8) (val >> 16);
2327 dev->mac_addr[4] = (u8) (val >> 8);
2328 dev->mac_addr[5] = (u8) val;
2329
2330 CNIC_WR(dev, BNX2_EMAC_MAC_MATCH5, val);
2331
2332 val = 4 | BNX2_RPM_SORT_USER2_BC_EN;
2333 if (CHIP_NUM(cp) != CHIP_NUM_5709)
2334 val |= BNX2_RPM_SORT_USER2_PROM_VLAN;
2335
2336 CNIC_WR(dev, BNX2_RPM_SORT_USER2, 0x0);
2337 CNIC_WR(dev, BNX2_RPM_SORT_USER2, val);
2338 CNIC_WR(dev, BNX2_RPM_SORT_USER2, val | BNX2_RPM_SORT_USER2_ENA);
2339 }
2340
2341 static int cnic_start_bnx2_hw(struct cnic_dev *dev)
2342 {
2343 struct cnic_local *cp = dev->cnic_priv;
2344 struct cnic_eth_dev *ethdev = cp->ethdev;
2345 struct status_block *sblk = cp->status_blk;
2346 u32 val;
2347 int err;
2348
2349 cnic_set_bnx2_mac(dev);
2350
2351 val = CNIC_RD(dev, BNX2_MQ_CONFIG);
2352 val &= ~BNX2_MQ_CONFIG_KNL_BYP_BLK_SIZE;
2353 if (BCM_PAGE_BITS > 12)
2354 val |= (12 - 8) << 4;
2355 else
2356 val |= (BCM_PAGE_BITS - 8) << 4;
2357
2358 CNIC_WR(dev, BNX2_MQ_CONFIG, val);
2359
2360 CNIC_WR(dev, BNX2_HC_COMP_PROD_TRIP, (2 << 16) | 8);
2361 CNIC_WR(dev, BNX2_HC_COM_TICKS, (64 << 16) | 220);
2362 CNIC_WR(dev, BNX2_HC_CMD_TICKS, (64 << 16) | 220);
2363
2364 err = cnic_setup_5709_context(dev, 1);
2365 if (err)
2366 return err;
2367
2368 cnic_init_context(dev, KWQ_CID);
2369 cnic_init_context(dev, KCQ_CID);
2370
2371 cp->kwq_cid_addr = GET_CID_ADDR(KWQ_CID);
2372 cp->kwq_io_addr = MB_GET_CID_ADDR(KWQ_CID) + L5_KRNLQ_HOST_QIDX;
2373
2374 cp->max_kwq_idx = MAX_KWQ_IDX;
2375 cp->kwq_prod_idx = 0;
2376 cp->kwq_con_idx = 0;
2377 cp->cnic_local_flags |= CNIC_LCL_FL_KWQ_INIT;
2378
2379 if (CHIP_NUM(cp) == CHIP_NUM_5706 || CHIP_NUM(cp) == CHIP_NUM_5708)
2380 cp->kwq_con_idx_ptr = &sblk->status_rx_quick_consumer_index15;
2381 else
2382 cp->kwq_con_idx_ptr = &sblk->status_cmd_consumer_index;
2383
2384 /* Initialize the kernel work queue context. */
2385 val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2386 (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2387 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_TYPE, val);
2388
2389 val = (BCM_PAGE_SIZE / sizeof(struct kwqe) - 1) << 16;
2390 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2391
2392 val = ((BCM_PAGE_SIZE / sizeof(struct kwqe)) << 16) | KWQ_PAGE_CNT;
2393 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2394
2395 val = (u32) ((u64) cp->kwq_info.pgtbl_map >> 32);
2396 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2397
2398 val = (u32) cp->kwq_info.pgtbl_map;
2399 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2400
2401 cp->kcq_cid_addr = GET_CID_ADDR(KCQ_CID);
2402 cp->kcq_io_addr = MB_GET_CID_ADDR(KCQ_CID) + L5_KRNLQ_HOST_QIDX;
2403
2404 cp->kcq_prod_idx = 0;
2405
2406 /* Initialize the kernel complete queue context. */
2407 val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2408 (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2409 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_TYPE, val);
2410
2411 val = (BCM_PAGE_SIZE / sizeof(struct kcqe) - 1) << 16;
2412 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2413
2414 val = ((BCM_PAGE_SIZE / sizeof(struct kcqe)) << 16) | KCQ_PAGE_CNT;
2415 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2416
2417 val = (u32) ((u64) cp->kcq_info.pgtbl_map >> 32);
2418 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2419
2420 val = (u32) cp->kcq_info.pgtbl_map;
2421 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2422
2423 cp->int_num = 0;
2424 if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2425 u32 sb_id = cp->status_blk_num;
2426 u32 sb = BNX2_L2CTX_L5_STATUSB_NUM(sb_id);
2427
2428 cp->int_num = sb_id << BNX2_PCICFG_INT_ACK_CMD_INT_NUM_SHIFT;
2429 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2430 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2431 }
2432
2433 /* Enable Commnad Scheduler notification when we write to the
2434 * host producer index of the kernel contexts. */
2435 CNIC_WR(dev, BNX2_MQ_KNL_CMD_MASK1, 2);
2436
2437 /* Enable Command Scheduler notification when we write to either
2438 * the Send Queue or Receive Queue producer indexes of the kernel
2439 * bypass contexts. */
2440 CNIC_WR(dev, BNX2_MQ_KNL_BYP_CMD_MASK1, 7);
2441 CNIC_WR(dev, BNX2_MQ_KNL_BYP_WRITE_MASK1, 7);
2442
2443 /* Notify COM when the driver post an application buffer. */
2444 CNIC_WR(dev, BNX2_MQ_KNL_RX_V2P_MASK2, 0x2000);
2445
2446 /* Set the CP and COM doorbells. These two processors polls the
2447 * doorbell for a non zero value before running. This must be done
2448 * after setting up the kernel queue contexts. */
2449 cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 1);
2450 cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 1);
2451
2452 cnic_init_bnx2_tx_ring(dev);
2453 cnic_init_bnx2_rx_ring(dev);
2454
2455 err = cnic_init_bnx2_irq(dev);
2456 if (err) {
2457 printk(KERN_ERR PFX "%s: cnic_init_irq failed\n",
2458 dev->netdev->name);
2459 cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2460 cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2461 return err;
2462 }
2463
2464 return 0;
2465 }
2466
2467 static int cnic_register_netdev(struct cnic_dev *dev)
2468 {
2469 struct cnic_local *cp = dev->cnic_priv;
2470 struct cnic_eth_dev *ethdev = cp->ethdev;
2471 int err;
2472
2473 if (!ethdev)
2474 return -ENODEV;
2475
2476 if (ethdev->drv_state & CNIC_DRV_STATE_REGD)
2477 return 0;
2478
2479 err = ethdev->drv_register_cnic(dev->netdev, cp->cnic_ops, dev);
2480 if (err)
2481 printk(KERN_ERR PFX "%s: register_cnic failed\n",
2482 dev->netdev->name);
2483
2484 return err;
2485 }
2486
2487 static void cnic_unregister_netdev(struct cnic_dev *dev)
2488 {
2489 struct cnic_local *cp = dev->cnic_priv;
2490 struct cnic_eth_dev *ethdev = cp->ethdev;
2491
2492 if (!ethdev)
2493 return;
2494
2495 ethdev->drv_unregister_cnic(dev->netdev);
2496 }
2497
2498 static int cnic_start_hw(struct cnic_dev *dev)
2499 {
2500 struct cnic_local *cp = dev->cnic_priv;
2501 struct cnic_eth_dev *ethdev = cp->ethdev;
2502 int err;
2503
2504 if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
2505 return -EALREADY;
2506
2507 dev->regview = ethdev->io_base;
2508 cp->chip_id = ethdev->chip_id;
2509 pci_dev_get(dev->pcidev);
2510 cp->func = PCI_FUNC(dev->pcidev->devfn);
2511 cp->status_blk = ethdev->irq_arr[0].status_blk;
2512 cp->status_blk_num = ethdev->irq_arr[0].status_blk_num;
2513
2514 err = cp->alloc_resc(dev);
2515 if (err) {
2516 printk(KERN_ERR PFX "%s: allocate resource failure\n",
2517 dev->netdev->name);
2518 goto err1;
2519 }
2520
2521 err = cp->start_hw(dev);
2522 if (err)
2523 goto err1;
2524
2525 err = cnic_cm_open(dev);
2526 if (err)
2527 goto err1;
2528
2529 set_bit(CNIC_F_CNIC_UP, &dev->flags);
2530
2531 cp->enable_int(dev);
2532
2533 return 0;
2534
2535 err1:
2536 cp->free_resc(dev);
2537 pci_dev_put(dev->pcidev);
2538 return err;
2539 }
2540
2541 static void cnic_stop_bnx2_hw(struct cnic_dev *dev)
2542 {
2543 cnic_disable_bnx2_int_sync(dev);
2544
2545 cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2546 cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2547
2548 cnic_init_context(dev, KWQ_CID);
2549 cnic_init_context(dev, KCQ_CID);
2550
2551 cnic_setup_5709_context(dev, 0);
2552 cnic_free_irq(dev);
2553
2554 cnic_free_resc(dev);
2555 }
2556
2557 static void cnic_stop_hw(struct cnic_dev *dev)
2558 {
2559 if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2560 struct cnic_local *cp = dev->cnic_priv;
2561
2562 clear_bit(CNIC_F_CNIC_UP, &dev->flags);
2563 rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], NULL);
2564 synchronize_rcu();
2565 cnic_cm_shutdown(dev);
2566 cp->stop_hw(dev);
2567 pci_dev_put(dev->pcidev);
2568 }
2569 }
2570
2571 static void cnic_free_dev(struct cnic_dev *dev)
2572 {
2573 int i = 0;
2574
2575 while ((atomic_read(&dev->ref_count) != 0) && i < 10) {
2576 msleep(100);
2577 i++;
2578 }
2579 if (atomic_read(&dev->ref_count) != 0)
2580 printk(KERN_ERR PFX "%s: Failed waiting for ref count to go"
2581 " to zero.\n", dev->netdev->name);
2582
2583 printk(KERN_INFO PFX "Removed CNIC device: %s\n", dev->netdev->name);
2584 dev_put(dev->netdev);
2585 kfree(dev);
2586 }
2587
2588 static struct cnic_dev *cnic_alloc_dev(struct net_device *dev,
2589 struct pci_dev *pdev)
2590 {
2591 struct cnic_dev *cdev;
2592 struct cnic_local *cp;
2593 int alloc_size;
2594
2595 alloc_size = sizeof(struct cnic_dev) + sizeof(struct cnic_local);
2596
2597 cdev = kzalloc(alloc_size , GFP_KERNEL);
2598 if (cdev == NULL) {
2599 printk(KERN_ERR PFX "%s: allocate dev struct failure\n",
2600 dev->name);
2601 return NULL;
2602 }
2603
2604 cdev->netdev = dev;
2605 cdev->cnic_priv = (char *)cdev + sizeof(struct cnic_dev);
2606 cdev->register_device = cnic_register_device;
2607 cdev->unregister_device = cnic_unregister_device;
2608 cdev->iscsi_nl_msg_recv = cnic_iscsi_nl_msg_recv;
2609
2610 cp = cdev->cnic_priv;
2611 cp->dev = cdev;
2612 cp->uio_dev = -1;
2613 cp->l2_single_buf_size = 0x400;
2614 cp->l2_rx_ring_size = 3;
2615
2616 spin_lock_init(&cp->cnic_ulp_lock);
2617
2618 printk(KERN_INFO PFX "Added CNIC device: %s\n", dev->name);
2619
2620 return cdev;
2621 }
2622
2623 static struct cnic_dev *init_bnx2_cnic(struct net_device *dev)
2624 {
2625 struct pci_dev *pdev;
2626 struct cnic_dev *cdev;
2627 struct cnic_local *cp;
2628 struct cnic_eth_dev *ethdev = NULL;
2629 struct cnic_eth_dev *(*probe)(struct net_device *) = NULL;
2630
2631 probe = symbol_get(bnx2_cnic_probe);
2632 if (probe) {
2633 ethdev = (*probe)(dev);
2634 symbol_put(bnx2_cnic_probe);
2635 }
2636 if (!ethdev)
2637 return NULL;
2638
2639 pdev = ethdev->pdev;
2640 if (!pdev)
2641 return NULL;
2642
2643 dev_hold(dev);
2644 pci_dev_get(pdev);
2645 if (pdev->device == PCI_DEVICE_ID_NX2_5709 ||
2646 pdev->device == PCI_DEVICE_ID_NX2_5709S) {
2647 u8 rev;
2648
2649 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
2650 if (rev < 0x10) {
2651 pci_dev_put(pdev);
2652 goto cnic_err;
2653 }
2654 }
2655 pci_dev_put(pdev);
2656
2657 cdev = cnic_alloc_dev(dev, pdev);
2658 if (cdev == NULL)
2659 goto cnic_err;
2660
2661 set_bit(CNIC_F_BNX2_CLASS, &cdev->flags);
2662 cdev->submit_kwqes = cnic_submit_bnx2_kwqes;
2663
2664 cp = cdev->cnic_priv;
2665 cp->ethdev = ethdev;
2666 cdev->pcidev = pdev;
2667
2668 cp->cnic_ops = &cnic_bnx2_ops;
2669 cp->start_hw = cnic_start_bnx2_hw;
2670 cp->stop_hw = cnic_stop_bnx2_hw;
2671 cp->setup_pgtbl = cnic_setup_page_tbl;
2672 cp->alloc_resc = cnic_alloc_bnx2_resc;
2673 cp->free_resc = cnic_free_resc;
2674 cp->start_cm = cnic_cm_init_bnx2_hw;
2675 cp->stop_cm = cnic_cm_stop_bnx2_hw;
2676 cp->enable_int = cnic_enable_bnx2_int;
2677 cp->disable_int_sync = cnic_disable_bnx2_int_sync;
2678 cp->close_conn = cnic_close_bnx2_conn;
2679 cp->next_idx = cnic_bnx2_next_idx;
2680 cp->hw_idx = cnic_bnx2_hw_idx;
2681 return cdev;
2682
2683 cnic_err:
2684 dev_put(dev);
2685 return NULL;
2686 }
2687
2688 static struct cnic_dev *is_cnic_dev(struct net_device *dev)
2689 {
2690 struct ethtool_drvinfo drvinfo;
2691 struct cnic_dev *cdev = NULL;
2692
2693 if (dev->ethtool_ops && dev->ethtool_ops->get_drvinfo) {
2694 memset(&drvinfo, 0, sizeof(drvinfo));
2695 dev->ethtool_ops->get_drvinfo(dev, &drvinfo);
2696
2697 if (!strcmp(drvinfo.driver, "bnx2"))
2698 cdev = init_bnx2_cnic(dev);
2699 if (cdev) {
2700 write_lock(&cnic_dev_lock);
2701 list_add(&cdev->list, &cnic_dev_list);
2702 write_unlock(&cnic_dev_lock);
2703 }
2704 }
2705 return cdev;
2706 }
2707
2708 /**
2709 * netdev event handler
2710 */
2711 static int cnic_netdev_event(struct notifier_block *this, unsigned long event,
2712 void *ptr)
2713 {
2714 struct net_device *netdev = ptr;
2715 struct cnic_dev *dev;
2716 int if_type;
2717 int new_dev = 0;
2718
2719 dev = cnic_from_netdev(netdev);
2720
2721 if (!dev && (event == NETDEV_REGISTER || event == NETDEV_UP)) {
2722 /* Check for the hot-plug device */
2723 dev = is_cnic_dev(netdev);
2724 if (dev) {
2725 new_dev = 1;
2726 cnic_hold(dev);
2727 }
2728 }
2729 if (dev) {
2730 struct cnic_local *cp = dev->cnic_priv;
2731
2732 if (new_dev)
2733 cnic_ulp_init(dev);
2734 else if (event == NETDEV_UNREGISTER)
2735 cnic_ulp_exit(dev);
2736
2737 if (event == NETDEV_UP) {
2738 if (cnic_register_netdev(dev) != 0) {
2739 cnic_put(dev);
2740 goto done;
2741 }
2742 if (!cnic_start_hw(dev))
2743 cnic_ulp_start(dev);
2744 }
2745
2746 rcu_read_lock();
2747 for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
2748 struct cnic_ulp_ops *ulp_ops;
2749 void *ctx;
2750
2751 ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
2752 if (!ulp_ops || !ulp_ops->indicate_netevent)
2753 continue;
2754
2755 ctx = cp->ulp_handle[if_type];
2756
2757 ulp_ops->indicate_netevent(ctx, event);
2758 }
2759 rcu_read_unlock();
2760
2761 if (event == NETDEV_GOING_DOWN) {
2762 cnic_ulp_stop(dev);
2763 cnic_stop_hw(dev);
2764 cnic_unregister_netdev(dev);
2765 } else if (event == NETDEV_UNREGISTER) {
2766 write_lock(&cnic_dev_lock);
2767 list_del_init(&dev->list);
2768 write_unlock(&cnic_dev_lock);
2769
2770 cnic_put(dev);
2771 cnic_free_dev(dev);
2772 goto done;
2773 }
2774 cnic_put(dev);
2775 }
2776 done:
2777 return NOTIFY_DONE;
2778 }
2779
2780 static struct notifier_block cnic_netdev_notifier = {
2781 .notifier_call = cnic_netdev_event
2782 };
2783
2784 static void cnic_release(void)
2785 {
2786 struct cnic_dev *dev;
2787
2788 while (!list_empty(&cnic_dev_list)) {
2789 dev = list_entry(cnic_dev_list.next, struct cnic_dev, list);
2790 if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2791 cnic_ulp_stop(dev);
2792 cnic_stop_hw(dev);
2793 }
2794
2795 cnic_ulp_exit(dev);
2796 cnic_unregister_netdev(dev);
2797 list_del_init(&dev->list);
2798 cnic_free_dev(dev);
2799 }
2800 }
2801
2802 static int __init cnic_init(void)
2803 {
2804 int rc = 0;
2805
2806 printk(KERN_INFO "%s", version);
2807
2808 rc = register_netdevice_notifier(&cnic_netdev_notifier);
2809 if (rc) {
2810 cnic_release();
2811 return rc;
2812 }
2813
2814 return 0;
2815 }
2816
2817 static void __exit cnic_exit(void)
2818 {
2819 unregister_netdevice_notifier(&cnic_netdev_notifier);
2820 cnic_release();
2821 return;
2822 }
2823
2824 module_init(cnic_init);
2825 module_exit(cnic_exit);
Linux with added FPC-III support