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On Tue, Nov 06, 2007 at 02:33:53AM -0800, akpm@linux-foundation.org wrote:
[mmotm.git] / drivers / net / cnic.c
blob1fd10584badaa54078905b58c8a8a653120ce53f
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 "bnx2x_reg.h"
41 #include "bnx2x_fw_defs.h"
42 #include "bnx2x_hsi.h"
43 #include "../scsi/bnx2i/57xx_iscsi_constants.h"
44 #include "../scsi/bnx2i/57xx_iscsi_hsi.h"
45 #include "cnic.h"
46 #include "cnic_defs.h"
47
48 #define DRV_MODULE_NAME "cnic"
49 #define PFX DRV_MODULE_NAME ": "
50
51 static char version[] __devinitdata =
52 "Broadcom NetXtreme II CNIC Driver " DRV_MODULE_NAME " v" CNIC_MODULE_VERSION " (" CNIC_MODULE_RELDATE ")\n";
53
54 MODULE_AUTHOR("Michael Chan <mchan@broadcom.com> and John(Zongxi) "
55 "Chen (zongxi@broadcom.com");
56 MODULE_DESCRIPTION("Broadcom NetXtreme II CNIC Driver");
57 MODULE_LICENSE("GPL");
58 MODULE_VERSION(CNIC_MODULE_VERSION);
59
60 static LIST_HEAD(cnic_dev_list);
61 static DEFINE_RWLOCK(cnic_dev_lock);
62 static DEFINE_MUTEX(cnic_lock);
63
64 static struct cnic_ulp_ops *cnic_ulp_tbl[MAX_CNIC_ULP_TYPE];
65
66 static int cnic_service_bnx2(void *, void *);
67 static int cnic_ctl(void *, struct cnic_ctl_info *);
68
69 static struct cnic_ops cnic_bnx2_ops = {
70 .cnic_owner = THIS_MODULE,
71 .cnic_handler = cnic_service_bnx2,
72 .cnic_ctl = cnic_ctl,
73 };
74
75 static void cnic_shutdown_rings(struct cnic_dev *);
76 static void cnic_init_rings(struct cnic_dev *);
77 static int cnic_cm_set_pg(struct cnic_sock *);
78
79 static int cnic_uio_open(struct uio_info *uinfo, struct inode *inode)
80 {
81 struct cnic_dev *dev = uinfo->priv;
82 struct cnic_local *cp = dev->cnic_priv;
83
84 if (!capable(CAP_NET_ADMIN))
85 return -EPERM;
86
87 if (cp->uio_dev != -1)
88 return -EBUSY;
89
90 rtnl_lock();
91 if (!test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
92 rtnl_unlock();
93 return -ENODEV;
94 }
95
96 cp->uio_dev = iminor(inode);
97
98 cnic_init_rings(dev);
99 rtnl_unlock();
100
101 return 0;
102 }
103
104 static int cnic_uio_close(struct uio_info *uinfo, struct inode *inode)
105 {
106 struct cnic_dev *dev = uinfo->priv;
107 struct cnic_local *cp = dev->cnic_priv;
108
109 cnic_shutdown_rings(dev);
110
111 cp->uio_dev = -1;
112 return 0;
113 }
114
115 static inline void cnic_hold(struct cnic_dev *dev)
116 {
117 atomic_inc(&dev->ref_count);
118 }
119
120 static inline void cnic_put(struct cnic_dev *dev)
121 {
122 atomic_dec(&dev->ref_count);
123 }
124
125 static inline void csk_hold(struct cnic_sock *csk)
126 {
127 atomic_inc(&csk->ref_count);
128 }
129
130 static inline void csk_put(struct cnic_sock *csk)
131 {
132 atomic_dec(&csk->ref_count);
133 }
134
135 static struct cnic_dev *cnic_from_netdev(struct net_device *netdev)
136 {
137 struct cnic_dev *cdev;
138
139 read_lock(&cnic_dev_lock);
140 list_for_each_entry(cdev, &cnic_dev_list, list) {
141 if (netdev == cdev->netdev) {
142 cnic_hold(cdev);
143 read_unlock(&cnic_dev_lock);
144 return cdev;
145 }
146 }
147 read_unlock(&cnic_dev_lock);
148 return NULL;
149 }
150
151 static inline void ulp_get(struct cnic_ulp_ops *ulp_ops)
152 {
153 atomic_inc(&ulp_ops->ref_count);
154 }
155
156 static inline void ulp_put(struct cnic_ulp_ops *ulp_ops)
157 {
158 atomic_dec(&ulp_ops->ref_count);
159 }
160
161 static void cnic_ctx_wr(struct cnic_dev *dev, u32 cid_addr, u32 off, u32 val)
162 {
163 struct cnic_local *cp = dev->cnic_priv;
164 struct cnic_eth_dev *ethdev = cp->ethdev;
165 struct drv_ctl_info info;
166 struct drv_ctl_io *io = &info.data.io;
167
168 info.cmd = DRV_CTL_CTX_WR_CMD;
169 io->cid_addr = cid_addr;
170 io->offset = off;
171 io->data = val;
172 ethdev->drv_ctl(dev->netdev, &info);
173 }
174
175 static void cnic_reg_wr_ind(struct cnic_dev *dev, u32 off, u32 val)
176 {
177 struct cnic_local *cp = dev->cnic_priv;
178 struct cnic_eth_dev *ethdev = cp->ethdev;
179 struct drv_ctl_info info;
180 struct drv_ctl_io *io = &info.data.io;
181
182 info.cmd = DRV_CTL_IO_WR_CMD;
183 io->offset = off;
184 io->data = val;
185 ethdev->drv_ctl(dev->netdev, &info);
186 }
187
188 static u32 cnic_reg_rd_ind(struct cnic_dev *dev, u32 off)
189 {
190 struct cnic_local *cp = dev->cnic_priv;
191 struct cnic_eth_dev *ethdev = cp->ethdev;
192 struct drv_ctl_info info;
193 struct drv_ctl_io *io = &info.data.io;
194
195 info.cmd = DRV_CTL_IO_RD_CMD;
196 io->offset = off;
197 ethdev->drv_ctl(dev->netdev, &info);
198 return io->data;
199 }
200
201 static int cnic_in_use(struct cnic_sock *csk)
202 {
203 return test_bit(SK_F_INUSE, &csk->flags);
204 }
205
206 static void cnic_kwq_completion(struct cnic_dev *dev, u32 count)
207 {
208 struct cnic_local *cp = dev->cnic_priv;
209 struct cnic_eth_dev *ethdev = cp->ethdev;
210 struct drv_ctl_info info;
211
212 info.cmd = DRV_CTL_COMPLETION_CMD;
213 info.data.comp.comp_count = count;
214 ethdev->drv_ctl(dev->netdev, &info);
215 }
216
217 static int cnic_send_nlmsg(struct cnic_local *cp, u32 type,
218 struct cnic_sock *csk)
219 {
220 struct iscsi_path path_req;
221 char *buf = NULL;
222 u16 len = 0;
223 u32 msg_type = ISCSI_KEVENT_IF_DOWN;
224 struct cnic_ulp_ops *ulp_ops;
225
226 if (cp->uio_dev == -1)
227 return -ENODEV;
228
229 if (csk) {
230 len = sizeof(path_req);
231 buf = (char *) &path_req;
232 memset(&path_req, 0, len);
233
234 msg_type = ISCSI_KEVENT_PATH_REQ;
235 path_req.handle = (u64) csk->l5_cid;
236 if (test_bit(SK_F_IPV6, &csk->flags)) {
237 memcpy(&path_req.dst.v6_addr, &csk->dst_ip[0],
238 sizeof(struct in6_addr));
239 path_req.ip_addr_len = 16;
240 } else {
241 memcpy(&path_req.dst.v4_addr, &csk->dst_ip[0],
242 sizeof(struct in_addr));
243 path_req.ip_addr_len = 4;
244 }
245 path_req.vlan_id = csk->vlan_id;
246 path_req.pmtu = csk->mtu;
247 }
248
249 rcu_read_lock();
250 ulp_ops = rcu_dereference(cnic_ulp_tbl[CNIC_ULP_ISCSI]);
251 if (ulp_ops)
252 ulp_ops->iscsi_nl_send_msg(cp->dev, msg_type, buf, len);
253 rcu_read_unlock();
254 return 0;
255 }
256
257 static int cnic_iscsi_nl_msg_recv(struct cnic_dev *dev, u32 msg_type,
258 char *buf, u16 len)
259 {
260 int rc = -EINVAL;
261
262 switch (msg_type) {
263 case ISCSI_UEVENT_PATH_UPDATE: {
264 struct cnic_local *cp;
265 u32 l5_cid;
266 struct cnic_sock *csk;
267 struct iscsi_path *path_resp;
268
269 if (len < sizeof(*path_resp))
270 break;
271
272 path_resp = (struct iscsi_path *) buf;
273 cp = dev->cnic_priv;
274 l5_cid = (u32) path_resp->handle;
275 if (l5_cid >= MAX_CM_SK_TBL_SZ)
276 break;
277
278 csk = &cp->csk_tbl[l5_cid];
279 csk_hold(csk);
280 if (cnic_in_use(csk)) {
281 memcpy(csk->ha, path_resp->mac_addr, 6);
282 if (test_bit(SK_F_IPV6, &csk->flags))
283 memcpy(&csk->src_ip[0], &path_resp->src.v6_addr,
284 sizeof(struct in6_addr));
285 else
286 memcpy(&csk->src_ip[0], &path_resp->src.v4_addr,
287 sizeof(struct in_addr));
288 if (is_valid_ether_addr(csk->ha))
289 cnic_cm_set_pg(csk);
290 }
291 csk_put(csk);
292 rc = 0;
293 }
294 }
295
296 return rc;
297 }
298
299 static int cnic_offld_prep(struct cnic_sock *csk)
300 {
301 if (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
302 return 0;
303
304 if (!test_bit(SK_F_CONNECT_START, &csk->flags)) {
305 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
306 return 0;
307 }
308
309 return 1;
310 }
311
312 static int cnic_close_prep(struct cnic_sock *csk)
313 {
314 clear_bit(SK_F_CONNECT_START, &csk->flags);
315 smp_mb__after_clear_bit();
316
317 if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags)) {
318 while (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
319 msleep(1);
320
321 return 1;
322 }
323 return 0;
324 }
325
326 static int cnic_abort_prep(struct cnic_sock *csk)
327 {
328 clear_bit(SK_F_CONNECT_START, &csk->flags);
329 smp_mb__after_clear_bit();
330
331 while (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
332 msleep(1);
333
334 if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags)) {
335 csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
336 return 1;
337 }
338
339 return 0;
340 }
341
342 static void cnic_uio_stop(void)
343 {
344 struct cnic_dev *dev;
345
346 read_lock(&cnic_dev_lock);
347 list_for_each_entry(dev, &cnic_dev_list, list) {
348 struct cnic_local *cp = dev->cnic_priv;
349
350 if (cp->cnic_uinfo)
351 cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
352 }
353 read_unlock(&cnic_dev_lock);
354 }
355
356 int cnic_register_driver(int ulp_type, struct cnic_ulp_ops *ulp_ops)
357 {
358 struct cnic_dev *dev;
359
360 if (ulp_type >= MAX_CNIC_ULP_TYPE) {
361 printk(KERN_ERR PFX "cnic_register_driver: Bad type %d\n",
362 ulp_type);
363 return -EINVAL;
364 }
365 mutex_lock(&cnic_lock);
366 if (cnic_ulp_tbl[ulp_type]) {
367 printk(KERN_ERR PFX "cnic_register_driver: Type %d has already "
368 "been registered\n", ulp_type);
369 mutex_unlock(&cnic_lock);
370 return -EBUSY;
371 }
372
373 read_lock(&cnic_dev_lock);
374 list_for_each_entry(dev, &cnic_dev_list, list) {
375 struct cnic_local *cp = dev->cnic_priv;
376
377 clear_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]);
378 }
379 read_unlock(&cnic_dev_lock);
380
381 atomic_set(&ulp_ops->ref_count, 0);
382 rcu_assign_pointer(cnic_ulp_tbl[ulp_type], ulp_ops);
383 mutex_unlock(&cnic_lock);
384
385 /* Prevent race conditions with netdev_event */
386 rtnl_lock();
387 read_lock(&cnic_dev_lock);
388 list_for_each_entry(dev, &cnic_dev_list, list) {
389 struct cnic_local *cp = dev->cnic_priv;
390
391 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]))
392 ulp_ops->cnic_init(dev);
393 }
394 read_unlock(&cnic_dev_lock);
395 rtnl_unlock();
396
397 return 0;
398 }
399
400 int cnic_unregister_driver(int ulp_type)
401 {
402 struct cnic_dev *dev;
403 struct cnic_ulp_ops *ulp_ops;
404 int i = 0;
405
406 if (ulp_type >= MAX_CNIC_ULP_TYPE) {
407 printk(KERN_ERR PFX "cnic_unregister_driver: Bad type %d\n",
408 ulp_type);
409 return -EINVAL;
410 }
411 mutex_lock(&cnic_lock);
412 ulp_ops = cnic_ulp_tbl[ulp_type];
413 if (!ulp_ops) {
414 printk(KERN_ERR PFX "cnic_unregister_driver: Type %d has not "
415 "been registered\n", ulp_type);
416 goto out_unlock;
417 }
418 read_lock(&cnic_dev_lock);
419 list_for_each_entry(dev, &cnic_dev_list, list) {
420 struct cnic_local *cp = dev->cnic_priv;
421
422 if (rcu_dereference(cp->ulp_ops[ulp_type])) {
423 printk(KERN_ERR PFX "cnic_unregister_driver: Type %d "
424 "still has devices registered\n", ulp_type);
425 read_unlock(&cnic_dev_lock);
426 goto out_unlock;
427 }
428 }
429 read_unlock(&cnic_dev_lock);
430
431 if (ulp_type == CNIC_ULP_ISCSI)
432 cnic_uio_stop();
433
434 rcu_assign_pointer(cnic_ulp_tbl[ulp_type], NULL);
435
436 mutex_unlock(&cnic_lock);
437 synchronize_rcu();
438 while ((atomic_read(&ulp_ops->ref_count) != 0) && (i < 20)) {
439 msleep(100);
440 i++;
441 }
442
443 if (atomic_read(&ulp_ops->ref_count) != 0)
444 printk(KERN_WARNING PFX "%s: Failed waiting for ref count to go"
445 " to zero.\n", dev->netdev->name);
446 return 0;
447
448 out_unlock:
449 mutex_unlock(&cnic_lock);
450 return -EINVAL;
451 }
452
453 static int cnic_start_hw(struct cnic_dev *);
454 static void cnic_stop_hw(struct cnic_dev *);
455
456 static int cnic_register_device(struct cnic_dev *dev, int ulp_type,
457 void *ulp_ctx)
458 {
459 struct cnic_local *cp = dev->cnic_priv;
460 struct cnic_ulp_ops *ulp_ops;
461
462 if (ulp_type >= MAX_CNIC_ULP_TYPE) {
463 printk(KERN_ERR PFX "cnic_register_device: Bad type %d\n",
464 ulp_type);
465 return -EINVAL;
466 }
467 mutex_lock(&cnic_lock);
468 if (cnic_ulp_tbl[ulp_type] == NULL) {
469 printk(KERN_ERR PFX "cnic_register_device: Driver with type %d "
470 "has not been registered\n", ulp_type);
471 mutex_unlock(&cnic_lock);
472 return -EAGAIN;
473 }
474 if (rcu_dereference(cp->ulp_ops[ulp_type])) {
475 printk(KERN_ERR PFX "cnic_register_device: Type %d has already "
476 "been registered to this device\n", ulp_type);
477 mutex_unlock(&cnic_lock);
478 return -EBUSY;
479 }
480
481 clear_bit(ULP_F_START, &cp->ulp_flags[ulp_type]);
482 cp->ulp_handle[ulp_type] = ulp_ctx;
483 ulp_ops = cnic_ulp_tbl[ulp_type];
484 rcu_assign_pointer(cp->ulp_ops[ulp_type], ulp_ops);
485 cnic_hold(dev);
486
487 if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
488 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[ulp_type]))
489 ulp_ops->cnic_start(cp->ulp_handle[ulp_type]);
490
491 mutex_unlock(&cnic_lock);
492
493 return 0;
494
495 }
496 EXPORT_SYMBOL(cnic_register_driver);
497
498 static int cnic_unregister_device(struct cnic_dev *dev, int ulp_type)
499 {
500 struct cnic_local *cp = dev->cnic_priv;
501 int i = 0;
502
503 if (ulp_type >= MAX_CNIC_ULP_TYPE) {
504 printk(KERN_ERR PFX "cnic_unregister_device: Bad type %d\n",
505 ulp_type);
506 return -EINVAL;
507 }
508 mutex_lock(&cnic_lock);
509 if (rcu_dereference(cp->ulp_ops[ulp_type])) {
510 rcu_assign_pointer(cp->ulp_ops[ulp_type], NULL);
511 cnic_put(dev);
512 } else {
513 printk(KERN_ERR PFX "cnic_unregister_device: device not "
514 "registered to this ulp type %d\n", ulp_type);
515 mutex_unlock(&cnic_lock);
516 return -EINVAL;
517 }
518 mutex_unlock(&cnic_lock);
519
520 synchronize_rcu();
521
522 while (test_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[ulp_type]) &&
523 i < 20) {
524 msleep(100);
525 i++;
526 }
527 if (test_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[ulp_type]))
528 printk(KERN_WARNING PFX "%s: Failed waiting for ULP up call"
529 " to complete.\n", dev->netdev->name);
530
531 return 0;
532 }
533 EXPORT_SYMBOL(cnic_unregister_driver);
534
535 static int cnic_init_id_tbl(struct cnic_id_tbl *id_tbl, u32 size, u32 start_id)
536 {
537 id_tbl->start = start_id;
538 id_tbl->max = size;
539 id_tbl->next = 0;
540 spin_lock_init(&id_tbl->lock);
541 id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
542 if (!id_tbl->table)
543 return -ENOMEM;
544
545 return 0;
546 }
547
548 static void cnic_free_id_tbl(struct cnic_id_tbl *id_tbl)
549 {
550 kfree(id_tbl->table);
551 id_tbl->table = NULL;
552 }
553
554 static int cnic_alloc_id(struct cnic_id_tbl *id_tbl, u32 id)
555 {
556 int ret = -1;
557
558 id -= id_tbl->start;
559 if (id >= id_tbl->max)
560 return ret;
561
562 spin_lock(&id_tbl->lock);
563 if (!test_bit(id, id_tbl->table)) {
564 set_bit(id, id_tbl->table);
565 ret = 0;
566 }
567 spin_unlock(&id_tbl->lock);
568 return ret;
569 }
570
571 /* Returns -1 if not successful */
572 static u32 cnic_alloc_new_id(struct cnic_id_tbl *id_tbl)
573 {
574 u32 id;
575
576 spin_lock(&id_tbl->lock);
577 id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
578 if (id >= id_tbl->max) {
579 id = -1;
580 if (id_tbl->next != 0) {
581 id = find_first_zero_bit(id_tbl->table, id_tbl->next);
582 if (id >= id_tbl->next)
583 id = -1;
584 }
585 }
586
587 if (id < id_tbl->max) {
588 set_bit(id, id_tbl->table);
589 id_tbl->next = (id + 1) & (id_tbl->max - 1);
590 id += id_tbl->start;
591 }
592
593 spin_unlock(&id_tbl->lock);
594
595 return id;
596 }
597
598 static void cnic_free_id(struct cnic_id_tbl *id_tbl, u32 id)
599 {
600 if (id == -1)
601 return;
602
603 id -= id_tbl->start;
604 if (id >= id_tbl->max)
605 return;
606
607 clear_bit(id, id_tbl->table);
608 }
609
610 static void cnic_free_dma(struct cnic_dev *dev, struct cnic_dma *dma)
611 {
612 int i;
613
614 if (!dma->pg_arr)
615 return;
616
617 for (i = 0; i < dma->num_pages; i++) {
618 if (dma->pg_arr[i]) {
619 pci_free_consistent(dev->pcidev, BCM_PAGE_SIZE,
620 dma->pg_arr[i], dma->pg_map_arr[i]);
621 dma->pg_arr[i] = NULL;
622 }
623 }
624 if (dma->pgtbl) {
625 pci_free_consistent(dev->pcidev, dma->pgtbl_size,
626 dma->pgtbl, dma->pgtbl_map);
627 dma->pgtbl = NULL;
628 }
629 kfree(dma->pg_arr);
630 dma->pg_arr = NULL;
631 dma->num_pages = 0;
632 }
633
634 static void cnic_setup_page_tbl(struct cnic_dev *dev, struct cnic_dma *dma)
635 {
636 int i;
637 u32 *page_table = dma->pgtbl;
638
639 for (i = 0; i < dma->num_pages; i++) {
640 /* Each entry needs to be in big endian format. */
641 *page_table = (u32) ((u64) dma->pg_map_arr[i] >> 32);
642 page_table++;
643 *page_table = (u32) dma->pg_map_arr[i];
644 page_table++;
645 }
646 }
647
648 static int cnic_alloc_dma(struct cnic_dev *dev, struct cnic_dma *dma,
649 int pages, int use_pg_tbl)
650 {
651 int i, size;
652 struct cnic_local *cp = dev->cnic_priv;
653
654 size = pages * (sizeof(void *) + sizeof(dma_addr_t));
655 dma->pg_arr = kzalloc(size, GFP_ATOMIC);
656 if (dma->pg_arr == NULL)
657 return -ENOMEM;
658
659 dma->pg_map_arr = (dma_addr_t *) (dma->pg_arr + pages);
660 dma->num_pages = pages;
661
662 for (i = 0; i < pages; i++) {
663 dma->pg_arr[i] = pci_alloc_consistent(dev->pcidev,
664 BCM_PAGE_SIZE,
665 &dma->pg_map_arr[i]);
666 if (dma->pg_arr[i] == NULL)
667 goto error;
668 }
669 if (!use_pg_tbl)
670 return 0;
671
672 dma->pgtbl_size = ((pages * 8) + BCM_PAGE_SIZE - 1) &
673 ~(BCM_PAGE_SIZE - 1);
674 dma->pgtbl = pci_alloc_consistent(dev->pcidev, dma->pgtbl_size,
675 &dma->pgtbl_map);
676 if (dma->pgtbl == NULL)
677 goto error;
678
679 cp->setup_pgtbl(dev, dma);
680
681 return 0;
682
683 error:
684 cnic_free_dma(dev, dma);
685 return -ENOMEM;
686 }
687
688 static void cnic_free_context(struct cnic_dev *dev)
689 {
690 struct cnic_local *cp = dev->cnic_priv;
691 int i;
692
693 for (i = 0; i < cp->ctx_blks; i++) {
694 if (cp->ctx_arr[i].ctx) {
695 pci_free_consistent(dev->pcidev, cp->ctx_blk_size,
696 cp->ctx_arr[i].ctx,
697 cp->ctx_arr[i].mapping);
698 cp->ctx_arr[i].ctx = NULL;
699 }
700 }
701 }
702
703 static void cnic_free_resc(struct cnic_dev *dev)
704 {
705 struct cnic_local *cp = dev->cnic_priv;
706 int i = 0;
707
708 if (cp->cnic_uinfo) {
709 while (cp->uio_dev != -1 && i < 15) {
710 msleep(100);
711 i++;
712 }
713 uio_unregister_device(cp->cnic_uinfo);
714 kfree(cp->cnic_uinfo);
715 cp->cnic_uinfo = NULL;
716 }
717
718 if (cp->l2_buf) {
719 pci_free_consistent(dev->pcidev, cp->l2_buf_size,
720 cp->l2_buf, cp->l2_buf_map);
721 cp->l2_buf = NULL;
722 }
723
724 if (cp->l2_ring) {
725 pci_free_consistent(dev->pcidev, cp->l2_ring_size,
726 cp->l2_ring, cp->l2_ring_map);
727 cp->l2_ring = NULL;
728 }
729
730 cnic_free_context(dev);
731 kfree(cp->ctx_arr);
732 cp->ctx_arr = NULL;
733 cp->ctx_blks = 0;
734
735 cnic_free_dma(dev, &cp->gbl_buf_info);
736 cnic_free_dma(dev, &cp->conn_buf_info);
737 cnic_free_dma(dev, &cp->kwq_info);
738 cnic_free_dma(dev, &cp->kcq_info);
739 kfree(cp->iscsi_tbl);
740 cp->iscsi_tbl = NULL;
741 kfree(cp->ctx_tbl);
742 cp->ctx_tbl = NULL;
743
744 cnic_free_id_tbl(&cp->cid_tbl);
745 }
746
747 static int cnic_alloc_context(struct cnic_dev *dev)
748 {
749 struct cnic_local *cp = dev->cnic_priv;
750
751 if (CHIP_NUM(cp) == CHIP_NUM_5709) {
752 int i, k, arr_size;
753
754 cp->ctx_blk_size = BCM_PAGE_SIZE;
755 cp->cids_per_blk = BCM_PAGE_SIZE / 128;
756 arr_size = BNX2_MAX_CID / cp->cids_per_blk *
757 sizeof(struct cnic_ctx);
758 cp->ctx_arr = kzalloc(arr_size, GFP_KERNEL);
759 if (cp->ctx_arr == NULL)
760 return -ENOMEM;
761
762 k = 0;
763 for (i = 0; i < 2; i++) {
764 u32 j, reg, off, lo, hi;
765
766 if (i == 0)
767 off = BNX2_PG_CTX_MAP;
768 else
769 off = BNX2_ISCSI_CTX_MAP;
770
771 reg = cnic_reg_rd_ind(dev, off);
772 lo = reg >> 16;
773 hi = reg & 0xffff;
774 for (j = lo; j < hi; j += cp->cids_per_blk, k++)
775 cp->ctx_arr[k].cid = j;
776 }
777
778 cp->ctx_blks = k;
779 if (cp->ctx_blks >= (BNX2_MAX_CID / cp->cids_per_blk)) {
780 cp->ctx_blks = 0;
781 return -ENOMEM;
782 }
783
784 for (i = 0; i < cp->ctx_blks; i++) {
785 cp->ctx_arr[i].ctx =
786 pci_alloc_consistent(dev->pcidev, BCM_PAGE_SIZE,
787 &cp->ctx_arr[i].mapping);
788 if (cp->ctx_arr[i].ctx == NULL)
789 return -ENOMEM;
790 }
791 }
792 return 0;
793 }
794
795 static int cnic_alloc_l2_rings(struct cnic_dev *dev, int pages)
796 {
797 struct cnic_local *cp = dev->cnic_priv;
798
799 cp->l2_ring_size = pages * BCM_PAGE_SIZE;
800 cp->l2_ring = pci_alloc_consistent(dev->pcidev, cp->l2_ring_size,
801 &cp->l2_ring_map);
802 if (!cp->l2_ring)
803 return -ENOMEM;
804
805 cp->l2_buf_size = (cp->l2_rx_ring_size + 1) * cp->l2_single_buf_size;
806 cp->l2_buf_size = PAGE_ALIGN(cp->l2_buf_size);
807 cp->l2_buf = pci_alloc_consistent(dev->pcidev, cp->l2_buf_size,
808 &cp->l2_buf_map);
809 if (!cp->l2_buf)
810 return -ENOMEM;
811
812 return 0;
813 }
814
815 static int cnic_alloc_uio(struct cnic_dev *dev) {
816 struct cnic_local *cp = dev->cnic_priv;
817 struct uio_info *uinfo;
818 int ret;
819
820 uinfo = kzalloc(sizeof(*uinfo), GFP_ATOMIC);
821 if (!uinfo)
822 return -ENOMEM;
823
824 uinfo->mem[0].addr = dev->netdev->base_addr;
825 uinfo->mem[0].internal_addr = dev->regview;
826 uinfo->mem[0].size = dev->netdev->mem_end - dev->netdev->mem_start;
827 uinfo->mem[0].memtype = UIO_MEM_PHYS;
828
829 if (test_bit(CNIC_F_BNX2_CLASS, &dev->flags)) {
830 uinfo->mem[1].addr = (unsigned long) cp->status_blk & PAGE_MASK;
831 if (cp->ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX)
832 uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE * 9;
833 else
834 uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE;
835
836 uinfo->name = "bnx2_cnic";
837 }
838
839 uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
840
841 uinfo->mem[2].addr = (unsigned long) cp->l2_ring;
842 uinfo->mem[2].size = cp->l2_ring_size;
843 uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
844
845 uinfo->mem[3].addr = (unsigned long) cp->l2_buf;
846 uinfo->mem[3].size = cp->l2_buf_size;
847 uinfo->mem[3].memtype = UIO_MEM_LOGICAL;
848
849 uinfo->version = CNIC_MODULE_VERSION;
850 uinfo->irq = UIO_IRQ_CUSTOM;
851
852 uinfo->open = cnic_uio_open;
853 uinfo->release = cnic_uio_close;
854
855 uinfo->priv = dev;
856
857 ret = uio_register_device(&dev->pcidev->dev, uinfo);
858 if (ret) {
859 kfree(uinfo);
860 return ret;
861 }
862
863 cp->cnic_uinfo = uinfo;
864 return 0;
865 }
866
867 static int cnic_alloc_bnx2_resc(struct cnic_dev *dev)
868 {
869 struct cnic_local *cp = dev->cnic_priv;
870 int ret;
871
872 ret = cnic_alloc_dma(dev, &cp->kwq_info, KWQ_PAGE_CNT, 1);
873 if (ret)
874 goto error;
875 cp->kwq = (struct kwqe **) cp->kwq_info.pg_arr;
876
877 ret = cnic_alloc_dma(dev, &cp->kcq_info, KCQ_PAGE_CNT, 1);
878 if (ret)
879 goto error;
880 cp->kcq = (struct kcqe **) cp->kcq_info.pg_arr;
881
882 ret = cnic_alloc_context(dev);
883 if (ret)
884 goto error;
885
886 ret = cnic_alloc_l2_rings(dev, 2);
887 if (ret)
888 goto error;
889
890 ret = cnic_alloc_uio(dev);
891 if (ret)
892 goto error;
893
894 return 0;
895
896 error:
897 cnic_free_resc(dev);
898 return ret;
899 }
900
901 static inline u32 cnic_kwq_avail(struct cnic_local *cp)
902 {
903 return cp->max_kwq_idx -
904 ((cp->kwq_prod_idx - cp->kwq_con_idx) & cp->max_kwq_idx);
905 }
906
907 static int cnic_submit_bnx2_kwqes(struct cnic_dev *dev, struct kwqe *wqes[],
908 u32 num_wqes)
909 {
910 struct cnic_local *cp = dev->cnic_priv;
911 struct kwqe *prod_qe;
912 u16 prod, sw_prod, i;
913
914 if (!test_bit(CNIC_F_CNIC_UP, &dev->flags))
915 return -EAGAIN; /* bnx2 is down */
916
917 spin_lock_bh(&cp->cnic_ulp_lock);
918 if (num_wqes > cnic_kwq_avail(cp) &&
919 !(cp->cnic_local_flags & CNIC_LCL_FL_KWQ_INIT)) {
920 spin_unlock_bh(&cp->cnic_ulp_lock);
921 return -EAGAIN;
922 }
923
924 cp->cnic_local_flags &= ~CNIC_LCL_FL_KWQ_INIT;
925
926 prod = cp->kwq_prod_idx;
927 sw_prod = prod & MAX_KWQ_IDX;
928 for (i = 0; i < num_wqes; i++) {
929 prod_qe = &cp->kwq[KWQ_PG(sw_prod)][KWQ_IDX(sw_prod)];
930 memcpy(prod_qe, wqes[i], sizeof(struct kwqe));
931 prod++;
932 sw_prod = prod & MAX_KWQ_IDX;
933 }
934 cp->kwq_prod_idx = prod;
935
936 CNIC_WR16(dev, cp->kwq_io_addr, cp->kwq_prod_idx);
937
938 spin_unlock_bh(&cp->cnic_ulp_lock);
939 return 0;
940 }
941
942 static void service_kcqes(struct cnic_dev *dev, int num_cqes)
943 {
944 struct cnic_local *cp = dev->cnic_priv;
945 int i, j;
946
947 i = 0;
948 j = 1;
949 while (num_cqes) {
950 struct cnic_ulp_ops *ulp_ops;
951 int ulp_type;
952 u32 kcqe_op_flag = cp->completed_kcq[i]->kcqe_op_flag;
953 u32 kcqe_layer = kcqe_op_flag & KCQE_FLAGS_LAYER_MASK;
954
955 if (unlikely(kcqe_op_flag & KCQE_RAMROD_COMPLETION))
956 cnic_kwq_completion(dev, 1);
957
958 while (j < num_cqes) {
959 u32 next_op = cp->completed_kcq[i + j]->kcqe_op_flag;
960
961 if ((next_op & KCQE_FLAGS_LAYER_MASK) != kcqe_layer)
962 break;
963
964 if (unlikely(next_op & KCQE_RAMROD_COMPLETION))
965 cnic_kwq_completion(dev, 1);
966 j++;
967 }
968
969 if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_RDMA)
970 ulp_type = CNIC_ULP_RDMA;
971 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_ISCSI)
972 ulp_type = CNIC_ULP_ISCSI;
973 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L4)
974 ulp_type = CNIC_ULP_L4;
975 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L2)
976 goto end;
977 else {
978 printk(KERN_ERR PFX "%s: Unknown type of KCQE(0x%x)\n",
979 dev->netdev->name, kcqe_op_flag);
980 goto end;
981 }
982
983 rcu_read_lock();
984 ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
985 if (likely(ulp_ops)) {
986 ulp_ops->indicate_kcqes(cp->ulp_handle[ulp_type],
987 cp->completed_kcq + i, j);
988 }
989 rcu_read_unlock();
990 end:
991 num_cqes -= j;
992 i += j;
993 j = 1;
994 }
995 return;
996 }
997
998 static u16 cnic_bnx2_next_idx(u16 idx)
999 {
1000 return idx + 1;
1001 }
1002
1003 static u16 cnic_bnx2_hw_idx(u16 idx)
1004 {
1005 return idx;
1006 }
1007
1008 static int cnic_get_kcqes(struct cnic_dev *dev, u16 hw_prod, u16 *sw_prod)
1009 {
1010 struct cnic_local *cp = dev->cnic_priv;
1011 u16 i, ri, last;
1012 struct kcqe *kcqe;
1013 int kcqe_cnt = 0, last_cnt = 0;
1014
1015 i = ri = last = *sw_prod;
1016 ri &= MAX_KCQ_IDX;
1017
1018 while ((i != hw_prod) && (kcqe_cnt < MAX_COMPLETED_KCQE)) {
1019 kcqe = &cp->kcq[KCQ_PG(ri)][KCQ_IDX(ri)];
1020 cp->completed_kcq[kcqe_cnt++] = kcqe;
1021 i = cp->next_idx(i);
1022 ri = i & MAX_KCQ_IDX;
1023 if (likely(!(kcqe->kcqe_op_flag & KCQE_FLAGS_NEXT))) {
1024 last_cnt = kcqe_cnt;
1025 last = i;
1026 }
1027 }
1028
1029 *sw_prod = last;
1030 return last_cnt;
1031 }
1032
1033 static void cnic_chk_pkt_rings(struct cnic_local *cp)
1034 {
1035 u16 rx_cons = *cp->rx_cons_ptr;
1036 u16 tx_cons = *cp->tx_cons_ptr;
1037
1038 if (cp->tx_cons != tx_cons || cp->rx_cons != rx_cons) {
1039 cp->tx_cons = tx_cons;
1040 cp->rx_cons = rx_cons;
1041 uio_event_notify(cp->cnic_uinfo);
1042 }
1043 }
1044
1045 static int cnic_service_bnx2(void *data, void *status_blk)
1046 {
1047 struct cnic_dev *dev = data;
1048 struct status_block *sblk = status_blk;
1049 struct cnic_local *cp = dev->cnic_priv;
1050 u32 status_idx = sblk->status_idx;
1051 u16 hw_prod, sw_prod;
1052 int kcqe_cnt;
1053
1054 if (unlikely(!test_bit(CNIC_F_CNIC_UP, &dev->flags)))
1055 return status_idx;
1056
1057 cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
1058
1059 hw_prod = sblk->status_completion_producer_index;
1060 sw_prod = cp->kcq_prod_idx;
1061 while (sw_prod != hw_prod) {
1062 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
1063 if (kcqe_cnt == 0)
1064 goto done;
1065
1066 service_kcqes(dev, kcqe_cnt);
1067
1068 /* Tell compiler that status_blk fields can change. */
1069 barrier();
1070 if (status_idx != sblk->status_idx) {
1071 status_idx = sblk->status_idx;
1072 cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
1073 hw_prod = sblk->status_completion_producer_index;
1074 } else
1075 break;
1076 }
1077
1078 done:
1079 CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
1080
1081 cp->kcq_prod_idx = sw_prod;
1082
1083 cnic_chk_pkt_rings(cp);
1084 return status_idx;
1085 }
1086
1087 static void cnic_service_bnx2_msix(unsigned long data)
1088 {
1089 struct cnic_dev *dev = (struct cnic_dev *) data;
1090 struct cnic_local *cp = dev->cnic_priv;
1091 struct status_block_msix *status_blk = cp->bnx2_status_blk;
1092 u32 status_idx = status_blk->status_idx;
1093 u16 hw_prod, sw_prod;
1094 int kcqe_cnt;
1095
1096 cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1097
1098 hw_prod = status_blk->status_completion_producer_index;
1099 sw_prod = cp->kcq_prod_idx;
1100 while (sw_prod != hw_prod) {
1101 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
1102 if (kcqe_cnt == 0)
1103 goto done;
1104
1105 service_kcqes(dev, kcqe_cnt);
1106
1107 /* Tell compiler that status_blk fields can change. */
1108 barrier();
1109 if (status_idx != status_blk->status_idx) {
1110 status_idx = status_blk->status_idx;
1111 cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1112 hw_prod = status_blk->status_completion_producer_index;
1113 } else
1114 break;
1115 }
1116
1117 done:
1118 CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
1119 cp->kcq_prod_idx = sw_prod;
1120
1121 cnic_chk_pkt_rings(cp);
1122
1123 cp->last_status_idx = status_idx;
1124 CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
1125 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
1126 }
1127
1128 static irqreturn_t cnic_irq(int irq, void *dev_instance)
1129 {
1130 struct cnic_dev *dev = dev_instance;
1131 struct cnic_local *cp = dev->cnic_priv;
1132 u16 prod = cp->kcq_prod_idx & MAX_KCQ_IDX;
1133
1134 if (cp->ack_int)
1135 cp->ack_int(dev);
1136
1137 prefetch(cp->status_blk);
1138 prefetch(&cp->kcq[KCQ_PG(prod)][KCQ_IDX(prod)]);
1139
1140 if (likely(test_bit(CNIC_F_CNIC_UP, &dev->flags)))
1141 tasklet_schedule(&cp->cnic_irq_task);
1142
1143 return IRQ_HANDLED;
1144 }
1145
1146 static void cnic_ulp_stop(struct cnic_dev *dev)
1147 {
1148 struct cnic_local *cp = dev->cnic_priv;
1149 int if_type;
1150
1151 if (cp->cnic_uinfo)
1152 cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
1153
1154 for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1155 struct cnic_ulp_ops *ulp_ops;
1156
1157 mutex_lock(&cnic_lock);
1158 ulp_ops = cp->ulp_ops[if_type];
1159 if (!ulp_ops) {
1160 mutex_unlock(&cnic_lock);
1161 continue;
1162 }
1163 set_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
1164 mutex_unlock(&cnic_lock);
1165
1166 if (test_and_clear_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1167 ulp_ops->cnic_stop(cp->ulp_handle[if_type]);
1168
1169 clear_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
1170 }
1171 }
1172
1173 static void cnic_ulp_start(struct cnic_dev *dev)
1174 {
1175 struct cnic_local *cp = dev->cnic_priv;
1176 int if_type;
1177
1178 for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1179 struct cnic_ulp_ops *ulp_ops;
1180
1181 mutex_lock(&cnic_lock);
1182 ulp_ops = cp->ulp_ops[if_type];
1183 if (!ulp_ops || !ulp_ops->cnic_start) {
1184 mutex_unlock(&cnic_lock);
1185 continue;
1186 }
1187 set_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
1188 mutex_unlock(&cnic_lock);
1189
1190 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1191 ulp_ops->cnic_start(cp->ulp_handle[if_type]);
1192
1193 clear_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
1194 }
1195 }
1196
1197 static int cnic_ctl(void *data, struct cnic_ctl_info *info)
1198 {
1199 struct cnic_dev *dev = data;
1200
1201 switch (info->cmd) {
1202 case CNIC_CTL_STOP_CMD:
1203 cnic_hold(dev);
1204
1205 cnic_ulp_stop(dev);
1206 cnic_stop_hw(dev);
1207
1208 cnic_put(dev);
1209 break;
1210 case CNIC_CTL_START_CMD:
1211 cnic_hold(dev);
1212
1213 if (!cnic_start_hw(dev))
1214 cnic_ulp_start(dev);
1215
1216 cnic_put(dev);
1217 break;
1218 default:
1219 return -EINVAL;
1220 }
1221 return 0;
1222 }
1223
1224 static void cnic_ulp_init(struct cnic_dev *dev)
1225 {
1226 int i;
1227 struct cnic_local *cp = dev->cnic_priv;
1228
1229 for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1230 struct cnic_ulp_ops *ulp_ops;
1231
1232 mutex_lock(&cnic_lock);
1233 ulp_ops = cnic_ulp_tbl[i];
1234 if (!ulp_ops || !ulp_ops->cnic_init) {
1235 mutex_unlock(&cnic_lock);
1236 continue;
1237 }
1238 ulp_get(ulp_ops);
1239 mutex_unlock(&cnic_lock);
1240
1241 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1242 ulp_ops->cnic_init(dev);
1243
1244 ulp_put(ulp_ops);
1245 }
1246 }
1247
1248 static void cnic_ulp_exit(struct cnic_dev *dev)
1249 {
1250 int i;
1251 struct cnic_local *cp = dev->cnic_priv;
1252
1253 for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1254 struct cnic_ulp_ops *ulp_ops;
1255
1256 mutex_lock(&cnic_lock);
1257 ulp_ops = cnic_ulp_tbl[i];
1258 if (!ulp_ops || !ulp_ops->cnic_exit) {
1259 mutex_unlock(&cnic_lock);
1260 continue;
1261 }
1262 ulp_get(ulp_ops);
1263 mutex_unlock(&cnic_lock);
1264
1265 if (test_and_clear_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1266 ulp_ops->cnic_exit(dev);
1267
1268 ulp_put(ulp_ops);
1269 }
1270 }
1271
1272 static int cnic_cm_offload_pg(struct cnic_sock *csk)
1273 {
1274 struct cnic_dev *dev = csk->dev;
1275 struct l4_kwq_offload_pg *l4kwqe;
1276 struct kwqe *wqes[1];
1277
1278 l4kwqe = (struct l4_kwq_offload_pg *) &csk->kwqe1;
1279 memset(l4kwqe, 0, sizeof(*l4kwqe));
1280 wqes[0] = (struct kwqe *) l4kwqe;
1281
1282 l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_OFFLOAD_PG;
1283 l4kwqe->flags =
1284 L4_LAYER_CODE << L4_KWQ_OFFLOAD_PG_LAYER_CODE_SHIFT;
1285 l4kwqe->l2hdr_nbytes = ETH_HLEN;
1286
1287 l4kwqe->da0 = csk->ha[0];
1288 l4kwqe->da1 = csk->ha[1];
1289 l4kwqe->da2 = csk->ha[2];
1290 l4kwqe->da3 = csk->ha[3];
1291 l4kwqe->da4 = csk->ha[4];
1292 l4kwqe->da5 = csk->ha[5];
1293
1294 l4kwqe->sa0 = dev->mac_addr[0];
1295 l4kwqe->sa1 = dev->mac_addr[1];
1296 l4kwqe->sa2 = dev->mac_addr[2];
1297 l4kwqe->sa3 = dev->mac_addr[3];
1298 l4kwqe->sa4 = dev->mac_addr[4];
1299 l4kwqe->sa5 = dev->mac_addr[5];
1300
1301 l4kwqe->etype = ETH_P_IP;
1302 l4kwqe->ipid_count = DEF_IPID_COUNT;
1303 l4kwqe->host_opaque = csk->l5_cid;
1304
1305 if (csk->vlan_id) {
1306 l4kwqe->pg_flags |= L4_KWQ_OFFLOAD_PG_VLAN_TAGGING;
1307 l4kwqe->vlan_tag = csk->vlan_id;
1308 l4kwqe->l2hdr_nbytes += 4;
1309 }
1310
1311 return dev->submit_kwqes(dev, wqes, 1);
1312 }
1313
1314 static int cnic_cm_update_pg(struct cnic_sock *csk)
1315 {
1316 struct cnic_dev *dev = csk->dev;
1317 struct l4_kwq_update_pg *l4kwqe;
1318 struct kwqe *wqes[1];
1319
1320 l4kwqe = (struct l4_kwq_update_pg *) &csk->kwqe1;
1321 memset(l4kwqe, 0, sizeof(*l4kwqe));
1322 wqes[0] = (struct kwqe *) l4kwqe;
1323
1324 l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPDATE_PG;
1325 l4kwqe->flags =
1326 L4_LAYER_CODE << L4_KWQ_UPDATE_PG_LAYER_CODE_SHIFT;
1327 l4kwqe->pg_cid = csk->pg_cid;
1328
1329 l4kwqe->da0 = csk->ha[0];
1330 l4kwqe->da1 = csk->ha[1];
1331 l4kwqe->da2 = csk->ha[2];
1332 l4kwqe->da3 = csk->ha[3];
1333 l4kwqe->da4 = csk->ha[4];
1334 l4kwqe->da5 = csk->ha[5];
1335
1336 l4kwqe->pg_host_opaque = csk->l5_cid;
1337 l4kwqe->pg_valids = L4_KWQ_UPDATE_PG_VALIDS_DA;
1338
1339 return dev->submit_kwqes(dev, wqes, 1);
1340 }
1341
1342 static int cnic_cm_upload_pg(struct cnic_sock *csk)
1343 {
1344 struct cnic_dev *dev = csk->dev;
1345 struct l4_kwq_upload *l4kwqe;
1346 struct kwqe *wqes[1];
1347
1348 l4kwqe = (struct l4_kwq_upload *) &csk->kwqe1;
1349 memset(l4kwqe, 0, sizeof(*l4kwqe));
1350 wqes[0] = (struct kwqe *) l4kwqe;
1351
1352 l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPLOAD_PG;
1353 l4kwqe->flags =
1354 L4_LAYER_CODE << L4_KWQ_UPLOAD_LAYER_CODE_SHIFT;
1355 l4kwqe->cid = csk->pg_cid;
1356
1357 return dev->submit_kwqes(dev, wqes, 1);
1358 }
1359
1360 static int cnic_cm_conn_req(struct cnic_sock *csk)
1361 {
1362 struct cnic_dev *dev = csk->dev;
1363 struct l4_kwq_connect_req1 *l4kwqe1;
1364 struct l4_kwq_connect_req2 *l4kwqe2;
1365 struct l4_kwq_connect_req3 *l4kwqe3;
1366 struct kwqe *wqes[3];
1367 u8 tcp_flags = 0;
1368 int num_wqes = 2;
1369
1370 l4kwqe1 = (struct l4_kwq_connect_req1 *) &csk->kwqe1;
1371 l4kwqe2 = (struct l4_kwq_connect_req2 *) &csk->kwqe2;
1372 l4kwqe3 = (struct l4_kwq_connect_req3 *) &csk->kwqe3;
1373 memset(l4kwqe1, 0, sizeof(*l4kwqe1));
1374 memset(l4kwqe2, 0, sizeof(*l4kwqe2));
1375 memset(l4kwqe3, 0, sizeof(*l4kwqe3));
1376
1377 l4kwqe3->op_code = L4_KWQE_OPCODE_VALUE_CONNECT3;
1378 l4kwqe3->flags =
1379 L4_LAYER_CODE << L4_KWQ_CONNECT_REQ3_LAYER_CODE_SHIFT;
1380 l4kwqe3->ka_timeout = csk->ka_timeout;
1381 l4kwqe3->ka_interval = csk->ka_interval;
1382 l4kwqe3->ka_max_probe_count = csk->ka_max_probe_count;
1383 l4kwqe3->tos = csk->tos;
1384 l4kwqe3->ttl = csk->ttl;
1385 l4kwqe3->snd_seq_scale = csk->snd_seq_scale;
1386 l4kwqe3->pmtu = csk->mtu;
1387 l4kwqe3->rcv_buf = csk->rcv_buf;
1388 l4kwqe3->snd_buf = csk->snd_buf;
1389 l4kwqe3->seed = csk->seed;
1390
1391 wqes[0] = (struct kwqe *) l4kwqe1;
1392 if (test_bit(SK_F_IPV6, &csk->flags)) {
1393 wqes[1] = (struct kwqe *) l4kwqe2;
1394 wqes[2] = (struct kwqe *) l4kwqe3;
1395 num_wqes = 3;
1396
1397 l4kwqe1->conn_flags = L4_KWQ_CONNECT_REQ1_IP_V6;
1398 l4kwqe2->op_code = L4_KWQE_OPCODE_VALUE_CONNECT2;
1399 l4kwqe2->flags =
1400 L4_KWQ_CONNECT_REQ2_LINKED_WITH_NEXT |
1401 L4_LAYER_CODE << L4_KWQ_CONNECT_REQ2_LAYER_CODE_SHIFT;
1402 l4kwqe2->src_ip_v6_2 = be32_to_cpu(csk->src_ip[1]);
1403 l4kwqe2->src_ip_v6_3 = be32_to_cpu(csk->src_ip[2]);
1404 l4kwqe2->src_ip_v6_4 = be32_to_cpu(csk->src_ip[3]);
1405 l4kwqe2->dst_ip_v6_2 = be32_to_cpu(csk->dst_ip[1]);
1406 l4kwqe2->dst_ip_v6_3 = be32_to_cpu(csk->dst_ip[2]);
1407 l4kwqe2->dst_ip_v6_4 = be32_to_cpu(csk->dst_ip[3]);
1408 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct ipv6hdr) -
1409 sizeof(struct tcphdr);
1410 } else {
1411 wqes[1] = (struct kwqe *) l4kwqe3;
1412 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct iphdr) -
1413 sizeof(struct tcphdr);
1414 }
1415
1416 l4kwqe1->op_code = L4_KWQE_OPCODE_VALUE_CONNECT1;
1417 l4kwqe1->flags =
1418 (L4_LAYER_CODE << L4_KWQ_CONNECT_REQ1_LAYER_CODE_SHIFT) |
1419 L4_KWQ_CONNECT_REQ3_LINKED_WITH_NEXT;
1420 l4kwqe1->cid = csk->cid;
1421 l4kwqe1->pg_cid = csk->pg_cid;
1422 l4kwqe1->src_ip = be32_to_cpu(csk->src_ip[0]);
1423 l4kwqe1->dst_ip = be32_to_cpu(csk->dst_ip[0]);
1424 l4kwqe1->src_port = be16_to_cpu(csk->src_port);
1425 l4kwqe1->dst_port = be16_to_cpu(csk->dst_port);
1426 if (csk->tcp_flags & SK_TCP_NO_DELAY_ACK)
1427 tcp_flags |= L4_KWQ_CONNECT_REQ1_NO_DELAY_ACK;
1428 if (csk->tcp_flags & SK_TCP_KEEP_ALIVE)
1429 tcp_flags |= L4_KWQ_CONNECT_REQ1_KEEP_ALIVE;
1430 if (csk->tcp_flags & SK_TCP_NAGLE)
1431 tcp_flags |= L4_KWQ_CONNECT_REQ1_NAGLE_ENABLE;
1432 if (csk->tcp_flags & SK_TCP_TIMESTAMP)
1433 tcp_flags |= L4_KWQ_CONNECT_REQ1_TIME_STAMP;
1434 if (csk->tcp_flags & SK_TCP_SACK)
1435 tcp_flags |= L4_KWQ_CONNECT_REQ1_SACK;
1436 if (csk->tcp_flags & SK_TCP_SEG_SCALING)
1437 tcp_flags |= L4_KWQ_CONNECT_REQ1_SEG_SCALING;
1438
1439 l4kwqe1->tcp_flags = tcp_flags;
1440
1441 return dev->submit_kwqes(dev, wqes, num_wqes);
1442 }
1443
1444 static int cnic_cm_close_req(struct cnic_sock *csk)
1445 {
1446 struct cnic_dev *dev = csk->dev;
1447 struct l4_kwq_close_req *l4kwqe;
1448 struct kwqe *wqes[1];
1449
1450 l4kwqe = (struct l4_kwq_close_req *) &csk->kwqe2;
1451 memset(l4kwqe, 0, sizeof(*l4kwqe));
1452 wqes[0] = (struct kwqe *) l4kwqe;
1453
1454 l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_CLOSE;
1455 l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_CLOSE_REQ_LAYER_CODE_SHIFT;
1456 l4kwqe->cid = csk->cid;
1457
1458 return dev->submit_kwqes(dev, wqes, 1);
1459 }
1460
1461 static int cnic_cm_abort_req(struct cnic_sock *csk)
1462 {
1463 struct cnic_dev *dev = csk->dev;
1464 struct l4_kwq_reset_req *l4kwqe;
1465 struct kwqe *wqes[1];
1466
1467 l4kwqe = (struct l4_kwq_reset_req *) &csk->kwqe2;
1468 memset(l4kwqe, 0, sizeof(*l4kwqe));
1469 wqes[0] = (struct kwqe *) l4kwqe;
1470
1471 l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_RESET;
1472 l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_RESET_REQ_LAYER_CODE_SHIFT;
1473 l4kwqe->cid = csk->cid;
1474
1475 return dev->submit_kwqes(dev, wqes, 1);
1476 }
1477
1478 static int cnic_cm_create(struct cnic_dev *dev, int ulp_type, u32 cid,
1479 u32 l5_cid, struct cnic_sock **csk, void *context)
1480 {
1481 struct cnic_local *cp = dev->cnic_priv;
1482 struct cnic_sock *csk1;
1483
1484 if (l5_cid >= MAX_CM_SK_TBL_SZ)
1485 return -EINVAL;
1486
1487 csk1 = &cp->csk_tbl[l5_cid];
1488 if (atomic_read(&csk1->ref_count))
1489 return -EAGAIN;
1490
1491 if (test_and_set_bit(SK_F_INUSE, &csk1->flags))
1492 return -EBUSY;
1493
1494 csk1->dev = dev;
1495 csk1->cid = cid;
1496 csk1->l5_cid = l5_cid;
1497 csk1->ulp_type = ulp_type;
1498 csk1->context = context;
1499
1500 csk1->ka_timeout = DEF_KA_TIMEOUT;
1501 csk1->ka_interval = DEF_KA_INTERVAL;
1502 csk1->ka_max_probe_count = DEF_KA_MAX_PROBE_COUNT;
1503 csk1->tos = DEF_TOS;
1504 csk1->ttl = DEF_TTL;
1505 csk1->snd_seq_scale = DEF_SND_SEQ_SCALE;
1506 csk1->rcv_buf = DEF_RCV_BUF;
1507 csk1->snd_buf = DEF_SND_BUF;
1508 csk1->seed = DEF_SEED;
1509
1510 *csk = csk1;
1511 return 0;
1512 }
1513
1514 static void cnic_cm_cleanup(struct cnic_sock *csk)
1515 {
1516 if (csk->src_port) {
1517 struct cnic_dev *dev = csk->dev;
1518 struct cnic_local *cp = dev->cnic_priv;
1519
1520 cnic_free_id(&cp->csk_port_tbl, csk->src_port);
1521 csk->src_port = 0;
1522 }
1523 }
1524
1525 static void cnic_close_conn(struct cnic_sock *csk)
1526 {
1527 if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags)) {
1528 cnic_cm_upload_pg(csk);
1529 clear_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1530 }
1531 cnic_cm_cleanup(csk);
1532 }
1533
1534 static int cnic_cm_destroy(struct cnic_sock *csk)
1535 {
1536 if (!cnic_in_use(csk))
1537 return -EINVAL;
1538
1539 csk_hold(csk);
1540 clear_bit(SK_F_INUSE, &csk->flags);
1541 smp_mb__after_clear_bit();
1542 while (atomic_read(&csk->ref_count) != 1)
1543 msleep(1);
1544 cnic_cm_cleanup(csk);
1545
1546 csk->flags = 0;
1547 csk_put(csk);
1548 return 0;
1549 }
1550
1551 static inline u16 cnic_get_vlan(struct net_device *dev,
1552 struct net_device **vlan_dev)
1553 {
1554 if (dev->priv_flags & IFF_802_1Q_VLAN) {
1555 *vlan_dev = vlan_dev_real_dev(dev);
1556 return vlan_dev_vlan_id(dev);
1557 }
1558 *vlan_dev = dev;
1559 return 0;
1560 }
1561
1562 static int cnic_get_v4_route(struct sockaddr_in *dst_addr,
1563 struct dst_entry **dst)
1564 {
1565 #if defined(CONFIG_INET)
1566 struct flowi fl;
1567 int err;
1568 struct rtable *rt;
1569
1570 memset(&fl, 0, sizeof(fl));
1571 fl.nl_u.ip4_u.daddr = dst_addr->sin_addr.s_addr;
1572
1573 err = ip_route_output_key(&init_net, &rt, &fl);
1574 if (!err)
1575 *dst = &rt->u.dst;
1576 return err;
1577 #else
1578 return -ENETUNREACH;
1579 #endif
1580 }
1581
1582 static int cnic_get_v6_route(struct sockaddr_in6 *dst_addr,
1583 struct dst_entry **dst)
1584 {
1585 #if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
1586 struct flowi fl;
1587
1588 memset(&fl, 0, sizeof(fl));
1589 ipv6_addr_copy(&fl.fl6_dst, &dst_addr->sin6_addr);
1590 if (ipv6_addr_type(&fl.fl6_dst) & IPV6_ADDR_LINKLOCAL)
1591 fl.oif = dst_addr->sin6_scope_id;
1592
1593 *dst = ip6_route_output(&init_net, NULL, &fl);
1594 if (*dst)
1595 return 0;
1596 #endif
1597
1598 return -ENETUNREACH;
1599 }
1600
1601 static struct cnic_dev *cnic_cm_select_dev(struct sockaddr_in *dst_addr,
1602 int ulp_type)
1603 {
1604 struct cnic_dev *dev = NULL;
1605 struct dst_entry *dst;
1606 struct net_device *netdev = NULL;
1607 int err = -ENETUNREACH;
1608
1609 if (dst_addr->sin_family == AF_INET)
1610 err = cnic_get_v4_route(dst_addr, &dst);
1611 else if (dst_addr->sin_family == AF_INET6) {
1612 struct sockaddr_in6 *dst_addr6 =
1613 (struct sockaddr_in6 *) dst_addr;
1614
1615 err = cnic_get_v6_route(dst_addr6, &dst);
1616 } else
1617 return NULL;
1618
1619 if (err)
1620 return NULL;
1621
1622 if (!dst->dev)
1623 goto done;
1624
1625 cnic_get_vlan(dst->dev, &netdev);
1626
1627 dev = cnic_from_netdev(netdev);
1628
1629 done:
1630 dst_release(dst);
1631 if (dev)
1632 cnic_put(dev);
1633 return dev;
1634 }
1635
1636 static int cnic_resolve_addr(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1637 {
1638 struct cnic_dev *dev = csk->dev;
1639 struct cnic_local *cp = dev->cnic_priv;
1640
1641 return cnic_send_nlmsg(cp, ISCSI_KEVENT_PATH_REQ, csk);
1642 }
1643
1644 static int cnic_get_route(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1645 {
1646 struct cnic_dev *dev = csk->dev;
1647 struct cnic_local *cp = dev->cnic_priv;
1648 int is_v6, err, rc = -ENETUNREACH;
1649 struct dst_entry *dst;
1650 struct net_device *realdev;
1651 u32 local_port;
1652
1653 if (saddr->local.v6.sin6_family == AF_INET6 &&
1654 saddr->remote.v6.sin6_family == AF_INET6)
1655 is_v6 = 1;
1656 else if (saddr->local.v4.sin_family == AF_INET &&
1657 saddr->remote.v4.sin_family == AF_INET)
1658 is_v6 = 0;
1659 else
1660 return -EINVAL;
1661
1662 clear_bit(SK_F_IPV6, &csk->flags);
1663
1664 if (is_v6) {
1665 #if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
1666 set_bit(SK_F_IPV6, &csk->flags);
1667 err = cnic_get_v6_route(&saddr->remote.v6, &dst);
1668 if (err)
1669 return err;
1670
1671 if (!dst || dst->error || !dst->dev)
1672 goto err_out;
1673
1674 memcpy(&csk->dst_ip[0], &saddr->remote.v6.sin6_addr,
1675 sizeof(struct in6_addr));
1676 csk->dst_port = saddr->remote.v6.sin6_port;
1677 local_port = saddr->local.v6.sin6_port;
1678 #else
1679 return rc;
1680 #endif
1681
1682 } else {
1683 err = cnic_get_v4_route(&saddr->remote.v4, &dst);
1684 if (err)
1685 return err;
1686
1687 if (!dst || dst->error || !dst->dev)
1688 goto err_out;
1689
1690 csk->dst_ip[0] = saddr->remote.v4.sin_addr.s_addr;
1691 csk->dst_port = saddr->remote.v4.sin_port;
1692 local_port = saddr->local.v4.sin_port;
1693 }
1694
1695 csk->vlan_id = cnic_get_vlan(dst->dev, &realdev);
1696 if (realdev != dev->netdev)
1697 goto err_out;
1698
1699 if (local_port >= CNIC_LOCAL_PORT_MIN &&
1700 local_port < CNIC_LOCAL_PORT_MAX) {
1701 if (cnic_alloc_id(&cp->csk_port_tbl, local_port))
1702 local_port = 0;
1703 } else
1704 local_port = 0;
1705
1706 if (!local_port) {
1707 local_port = cnic_alloc_new_id(&cp->csk_port_tbl);
1708 if (local_port == -1) {
1709 rc = -ENOMEM;
1710 goto err_out;
1711 }
1712 }
1713 csk->src_port = local_port;
1714
1715 csk->mtu = dst_mtu(dst);
1716 rc = 0;
1717
1718 err_out:
1719 dst_release(dst);
1720 return rc;
1721 }
1722
1723 static void cnic_init_csk_state(struct cnic_sock *csk)
1724 {
1725 csk->state = 0;
1726 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1727 clear_bit(SK_F_CLOSING, &csk->flags);
1728 }
1729
1730 static int cnic_cm_connect(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1731 {
1732 int err = 0;
1733
1734 if (!cnic_in_use(csk))
1735 return -EINVAL;
1736
1737 if (test_and_set_bit(SK_F_CONNECT_START, &csk->flags))
1738 return -EINVAL;
1739
1740 cnic_init_csk_state(csk);
1741
1742 err = cnic_get_route(csk, saddr);
1743 if (err)
1744 goto err_out;
1745
1746 err = cnic_resolve_addr(csk, saddr);
1747 if (!err)
1748 return 0;
1749
1750 err_out:
1751 clear_bit(SK_F_CONNECT_START, &csk->flags);
1752 return err;
1753 }
1754
1755 static int cnic_cm_abort(struct cnic_sock *csk)
1756 {
1757 struct cnic_local *cp = csk->dev->cnic_priv;
1758 u32 opcode;
1759
1760 if (!cnic_in_use(csk))
1761 return -EINVAL;
1762
1763 if (cnic_abort_prep(csk))
1764 return cnic_cm_abort_req(csk);
1765
1766 /* Getting here means that we haven't started connect, or
1767 * connect was not successful.
1768 */
1769
1770 csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
1771 if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1772 opcode = csk->state;
1773 else
1774 opcode = L5CM_RAMROD_CMD_ID_TERMINATE_OFFLOAD;
1775 cp->close_conn(csk, opcode);
1776
1777 return 0;
1778 }
1779
1780 static int cnic_cm_close(struct cnic_sock *csk)
1781 {
1782 if (!cnic_in_use(csk))
1783 return -EINVAL;
1784
1785 if (cnic_close_prep(csk)) {
1786 csk->state = L4_KCQE_OPCODE_VALUE_CLOSE_COMP;
1787 return cnic_cm_close_req(csk);
1788 }
1789 return 0;
1790 }
1791
1792 static void cnic_cm_upcall(struct cnic_local *cp, struct cnic_sock *csk,
1793 u8 opcode)
1794 {
1795 struct cnic_ulp_ops *ulp_ops;
1796 int ulp_type = csk->ulp_type;
1797
1798 rcu_read_lock();
1799 ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
1800 if (ulp_ops) {
1801 if (opcode == L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE)
1802 ulp_ops->cm_connect_complete(csk);
1803 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)
1804 ulp_ops->cm_close_complete(csk);
1805 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED)
1806 ulp_ops->cm_remote_abort(csk);
1807 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_COMP)
1808 ulp_ops->cm_abort_complete(csk);
1809 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED)
1810 ulp_ops->cm_remote_close(csk);
1811 }
1812 rcu_read_unlock();
1813 }
1814
1815 static int cnic_cm_set_pg(struct cnic_sock *csk)
1816 {
1817 if (cnic_offld_prep(csk)) {
1818 if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1819 cnic_cm_update_pg(csk);
1820 else
1821 cnic_cm_offload_pg(csk);
1822 }
1823 return 0;
1824 }
1825
1826 static void cnic_cm_process_offld_pg(struct cnic_dev *dev, struct l4_kcq *kcqe)
1827 {
1828 struct cnic_local *cp = dev->cnic_priv;
1829 u32 l5_cid = kcqe->pg_host_opaque;
1830 u8 opcode = kcqe->op_code;
1831 struct cnic_sock *csk = &cp->csk_tbl[l5_cid];
1832
1833 csk_hold(csk);
1834 if (!cnic_in_use(csk))
1835 goto done;
1836
1837 if (opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1838 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1839 goto done;
1840 }
1841 csk->pg_cid = kcqe->pg_cid;
1842 set_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1843 cnic_cm_conn_req(csk);
1844
1845 done:
1846 csk_put(csk);
1847 }
1848
1849 static void cnic_cm_process_kcqe(struct cnic_dev *dev, struct kcqe *kcqe)
1850 {
1851 struct cnic_local *cp = dev->cnic_priv;
1852 struct l4_kcq *l4kcqe = (struct l4_kcq *) kcqe;
1853 u8 opcode = l4kcqe->op_code;
1854 u32 l5_cid;
1855 struct cnic_sock *csk;
1856
1857 if (opcode == L4_KCQE_OPCODE_VALUE_OFFLOAD_PG ||
1858 opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1859 cnic_cm_process_offld_pg(dev, l4kcqe);
1860 return;
1861 }
1862
1863 l5_cid = l4kcqe->conn_id;
1864 if (opcode & 0x80)
1865 l5_cid = l4kcqe->cid;
1866 if (l5_cid >= MAX_CM_SK_TBL_SZ)
1867 return;
1868
1869 csk = &cp->csk_tbl[l5_cid];
1870 csk_hold(csk);
1871
1872 if (!cnic_in_use(csk)) {
1873 csk_put(csk);
1874 return;
1875 }
1876
1877 switch (opcode) {
1878 case L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE:
1879 if (l4kcqe->status == 0)
1880 set_bit(SK_F_OFFLD_COMPLETE, &csk->flags);
1881
1882 smp_mb__before_clear_bit();
1883 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1884 cnic_cm_upcall(cp, csk, opcode);
1885 break;
1886
1887 case L4_KCQE_OPCODE_VALUE_RESET_RECEIVED:
1888 if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags))
1889 csk->state = opcode;
1890 /* fall through */
1891 case L4_KCQE_OPCODE_VALUE_CLOSE_COMP:
1892 case L4_KCQE_OPCODE_VALUE_RESET_COMP:
1893 cp->close_conn(csk, opcode);
1894 break;
1895
1896 case L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED:
1897 cnic_cm_upcall(cp, csk, opcode);
1898 break;
1899 }
1900 csk_put(csk);
1901 }
1902
1903 static void cnic_cm_indicate_kcqe(void *data, struct kcqe *kcqe[], u32 num)
1904 {
1905 struct cnic_dev *dev = data;
1906 int i;
1907
1908 for (i = 0; i < num; i++)
1909 cnic_cm_process_kcqe(dev, kcqe[i]);
1910 }
1911
1912 static struct cnic_ulp_ops cm_ulp_ops = {
1913 .indicate_kcqes = cnic_cm_indicate_kcqe,
1914 };
1915
1916 static void cnic_cm_free_mem(struct cnic_dev *dev)
1917 {
1918 struct cnic_local *cp = dev->cnic_priv;
1919
1920 kfree(cp->csk_tbl);
1921 cp->csk_tbl = NULL;
1922 cnic_free_id_tbl(&cp->csk_port_tbl);
1923 }
1924
1925 static int cnic_cm_alloc_mem(struct cnic_dev *dev)
1926 {
1927 struct cnic_local *cp = dev->cnic_priv;
1928
1929 cp->csk_tbl = kzalloc(sizeof(struct cnic_sock) * MAX_CM_SK_TBL_SZ,
1930 GFP_KERNEL);
1931 if (!cp->csk_tbl)
1932 return -ENOMEM;
1933
1934 if (cnic_init_id_tbl(&cp->csk_port_tbl, CNIC_LOCAL_PORT_RANGE,
1935 CNIC_LOCAL_PORT_MIN)) {
1936 cnic_cm_free_mem(dev);
1937 return -ENOMEM;
1938 }
1939 return 0;
1940 }
1941
1942 static int cnic_ready_to_close(struct cnic_sock *csk, u32 opcode)
1943 {
1944 if ((opcode == csk->state) ||
1945 (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED &&
1946 csk->state == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)) {
1947 if (!test_and_set_bit(SK_F_CLOSING, &csk->flags))
1948 return 1;
1949 }
1950 return 0;
1951 }
1952
1953 static void cnic_close_bnx2_conn(struct cnic_sock *csk, u32 opcode)
1954 {
1955 struct cnic_dev *dev = csk->dev;
1956 struct cnic_local *cp = dev->cnic_priv;
1957
1958 clear_bit(SK_F_CONNECT_START, &csk->flags);
1959 if (cnic_ready_to_close(csk, opcode)) {
1960 cnic_close_conn(csk);
1961 cnic_cm_upcall(cp, csk, opcode);
1962 }
1963 }
1964
1965 static void cnic_cm_stop_bnx2_hw(struct cnic_dev *dev)
1966 {
1967 }
1968
1969 static int cnic_cm_init_bnx2_hw(struct cnic_dev *dev)
1970 {
1971 u32 seed;
1972
1973 get_random_bytes(&seed, 4);
1974 cnic_ctx_wr(dev, 45, 0, seed);
1975 return 0;
1976 }
1977
1978 static int cnic_cm_open(struct cnic_dev *dev)
1979 {
1980 struct cnic_local *cp = dev->cnic_priv;
1981 int err;
1982
1983 err = cnic_cm_alloc_mem(dev);
1984 if (err)
1985 return err;
1986
1987 err = cp->start_cm(dev);
1988
1989 if (err)
1990 goto err_out;
1991
1992 dev->cm_create = cnic_cm_create;
1993 dev->cm_destroy = cnic_cm_destroy;
1994 dev->cm_connect = cnic_cm_connect;
1995 dev->cm_abort = cnic_cm_abort;
1996 dev->cm_close = cnic_cm_close;
1997 dev->cm_select_dev = cnic_cm_select_dev;
1998
1999 cp->ulp_handle[CNIC_ULP_L4] = dev;
2000 rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], &cm_ulp_ops);
2001 return 0;
2002
2003 err_out:
2004 cnic_cm_free_mem(dev);
2005 return err;
2006 }
2007
2008 static int cnic_cm_shutdown(struct cnic_dev *dev)
2009 {
2010 struct cnic_local *cp = dev->cnic_priv;
2011 int i;
2012
2013 cp->stop_cm(dev);
2014
2015 if (!cp->csk_tbl)
2016 return 0;
2017
2018 for (i = 0; i < MAX_CM_SK_TBL_SZ; i++) {
2019 struct cnic_sock *csk = &cp->csk_tbl[i];
2020
2021 clear_bit(SK_F_INUSE, &csk->flags);
2022 cnic_cm_cleanup(csk);
2023 }
2024 cnic_cm_free_mem(dev);
2025
2026 return 0;
2027 }
2028
2029 static void cnic_init_context(struct cnic_dev *dev, u32 cid)
2030 {
2031 struct cnic_local *cp = dev->cnic_priv;
2032 u32 cid_addr;
2033 int i;
2034
2035 if (CHIP_NUM(cp) == CHIP_NUM_5709)
2036 return;
2037
2038 cid_addr = GET_CID_ADDR(cid);
2039
2040 for (i = 0; i < CTX_SIZE; i += 4)
2041 cnic_ctx_wr(dev, cid_addr, i, 0);
2042 }
2043
2044 static int cnic_setup_5709_context(struct cnic_dev *dev, int valid)
2045 {
2046 struct cnic_local *cp = dev->cnic_priv;
2047 int ret = 0, i;
2048 u32 valid_bit = valid ? BNX2_CTX_HOST_PAGE_TBL_DATA0_VALID : 0;
2049
2050 if (CHIP_NUM(cp) != CHIP_NUM_5709)
2051 return 0;
2052
2053 for (i = 0; i < cp->ctx_blks; i++) {
2054 int j;
2055 u32 idx = cp->ctx_arr[i].cid / cp->cids_per_blk;
2056 u32 val;
2057
2058 memset(cp->ctx_arr[i].ctx, 0, BCM_PAGE_SIZE);
2059
2060 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA0,
2061 (cp->ctx_arr[i].mapping & 0xffffffff) | valid_bit);
2062 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA1,
2063 (u64) cp->ctx_arr[i].mapping >> 32);
2064 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL, idx |
2065 BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ);
2066 for (j = 0; j < 10; j++) {
2067
2068 val = CNIC_RD(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL);
2069 if (!(val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ))
2070 break;
2071 udelay(5);
2072 }
2073 if (val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ) {
2074 ret = -EBUSY;
2075 break;
2076 }
2077 }
2078 return ret;
2079 }
2080
2081 static void cnic_free_irq(struct cnic_dev *dev)
2082 {
2083 struct cnic_local *cp = dev->cnic_priv;
2084 struct cnic_eth_dev *ethdev = cp->ethdev;
2085
2086 if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2087 cp->disable_int_sync(dev);
2088 tasklet_disable(&cp->cnic_irq_task);
2089 free_irq(ethdev->irq_arr[0].vector, dev);
2090 }
2091 }
2092
2093 static int cnic_init_bnx2_irq(struct cnic_dev *dev)
2094 {
2095 struct cnic_local *cp = dev->cnic_priv;
2096 struct cnic_eth_dev *ethdev = cp->ethdev;
2097
2098 if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2099 int err, i = 0;
2100 int sblk_num = cp->status_blk_num;
2101 u32 base = ((sblk_num - 1) * BNX2_HC_SB_CONFIG_SIZE) +
2102 BNX2_HC_SB_CONFIG_1;
2103
2104 CNIC_WR(dev, base, BNX2_HC_SB_CONFIG_1_ONE_SHOT);
2105
2106 CNIC_WR(dev, base + BNX2_HC_COMP_PROD_TRIP_OFF, (2 << 16) | 8);
2107 CNIC_WR(dev, base + BNX2_HC_COM_TICKS_OFF, (64 << 16) | 220);
2108 CNIC_WR(dev, base + BNX2_HC_CMD_TICKS_OFF, (64 << 16) | 220);
2109
2110 cp->bnx2_status_blk = cp->status_blk;
2111 cp->last_status_idx = cp->bnx2_status_blk->status_idx;
2112 tasklet_init(&cp->cnic_irq_task, &cnic_service_bnx2_msix,
2113 (unsigned long) dev);
2114 err = request_irq(ethdev->irq_arr[0].vector, cnic_irq, 0,
2115 "cnic", dev);
2116 if (err) {
2117 tasklet_disable(&cp->cnic_irq_task);
2118 return err;
2119 }
2120 while (cp->bnx2_status_blk->status_completion_producer_index &&
2121 i < 10) {
2122 CNIC_WR(dev, BNX2_HC_COALESCE_NOW,
2123 1 << (11 + sblk_num));
2124 udelay(10);
2125 i++;
2126 barrier();
2127 }
2128 if (cp->bnx2_status_blk->status_completion_producer_index) {
2129 cnic_free_irq(dev);
2130 goto failed;
2131 }
2132
2133 } else {
2134 struct status_block *sblk = cp->status_blk;
2135 u32 hc_cmd = CNIC_RD(dev, BNX2_HC_COMMAND);
2136 int i = 0;
2137
2138 while (sblk->status_completion_producer_index && i < 10) {
2139 CNIC_WR(dev, BNX2_HC_COMMAND,
2140 hc_cmd | BNX2_HC_COMMAND_COAL_NOW_WO_INT);
2141 udelay(10);
2142 i++;
2143 barrier();
2144 }
2145 if (sblk->status_completion_producer_index)
2146 goto failed;
2147
2148 }
2149 return 0;
2150
2151 failed:
2152 printk(KERN_ERR PFX "%s: " "KCQ index not resetting to 0.\n",
2153 dev->netdev->name);
2154 return -EBUSY;
2155 }
2156
2157 static void cnic_enable_bnx2_int(struct cnic_dev *dev)
2158 {
2159 struct cnic_local *cp = dev->cnic_priv;
2160 struct cnic_eth_dev *ethdev = cp->ethdev;
2161
2162 if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2163 return;
2164
2165 CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2166 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
2167 }
2168
2169 static void cnic_disable_bnx2_int_sync(struct cnic_dev *dev)
2170 {
2171 struct cnic_local *cp = dev->cnic_priv;
2172 struct cnic_eth_dev *ethdev = cp->ethdev;
2173
2174 if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2175 return;
2176
2177 CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2178 BNX2_PCICFG_INT_ACK_CMD_MASK_INT);
2179 CNIC_RD(dev, BNX2_PCICFG_INT_ACK_CMD);
2180 synchronize_irq(ethdev->irq_arr[0].vector);
2181 }
2182
2183 static void cnic_init_bnx2_tx_ring(struct cnic_dev *dev)
2184 {
2185 struct cnic_local *cp = dev->cnic_priv;
2186 struct cnic_eth_dev *ethdev = cp->ethdev;
2187 u32 cid_addr, tx_cid, sb_id;
2188 u32 val, offset0, offset1, offset2, offset3;
2189 int i;
2190 struct tx_bd *txbd;
2191 dma_addr_t buf_map;
2192 struct status_block *s_blk = cp->status_blk;
2193
2194 sb_id = cp->status_blk_num;
2195 tx_cid = 20;
2196 cnic_init_context(dev, tx_cid);
2197 cnic_init_context(dev, tx_cid + 1);
2198 cp->tx_cons_ptr = &s_blk->status_tx_quick_consumer_index2;
2199 if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2200 struct status_block_msix *sblk = cp->status_blk;
2201
2202 tx_cid = TX_TSS_CID + sb_id - 1;
2203 cnic_init_context(dev, tx_cid);
2204 CNIC_WR(dev, BNX2_TSCH_TSS_CFG, (sb_id << 24) |
2205 (TX_TSS_CID << 7));
2206 cp->tx_cons_ptr = &sblk->status_tx_quick_consumer_index;
2207 }
2208 cp->tx_cons = *cp->tx_cons_ptr;
2209
2210 cid_addr = GET_CID_ADDR(tx_cid);
2211 if (CHIP_NUM(cp) == CHIP_NUM_5709) {
2212 u32 cid_addr2 = GET_CID_ADDR(tx_cid + 4) + 0x40;
2213
2214 for (i = 0; i < PHY_CTX_SIZE; i += 4)
2215 cnic_ctx_wr(dev, cid_addr2, i, 0);
2216
2217 offset0 = BNX2_L2CTX_TYPE_XI;
2218 offset1 = BNX2_L2CTX_CMD_TYPE_XI;
2219 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI_XI;
2220 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO_XI;
2221 } else {
2222 offset0 = BNX2_L2CTX_TYPE;
2223 offset1 = BNX2_L2CTX_CMD_TYPE;
2224 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI;
2225 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO;
2226 }
2227 val = BNX2_L2CTX_TYPE_TYPE_L2 | BNX2_L2CTX_TYPE_SIZE_L2;
2228 cnic_ctx_wr(dev, cid_addr, offset0, val);
2229
2230 val = BNX2_L2CTX_CMD_TYPE_TYPE_L2 | (8 << 16);
2231 cnic_ctx_wr(dev, cid_addr, offset1, val);
2232
2233 txbd = (struct tx_bd *) cp->l2_ring;
2234
2235 buf_map = cp->l2_buf_map;
2236 for (i = 0; i < MAX_TX_DESC_CNT; i++, txbd++) {
2237 txbd->tx_bd_haddr_hi = (u64) buf_map >> 32;
2238 txbd->tx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2239 }
2240 val = (u64) cp->l2_ring_map >> 32;
2241 cnic_ctx_wr(dev, cid_addr, offset2, val);
2242 txbd->tx_bd_haddr_hi = val;
2243
2244 val = (u64) cp->l2_ring_map & 0xffffffff;
2245 cnic_ctx_wr(dev, cid_addr, offset3, val);
2246 txbd->tx_bd_haddr_lo = val;
2247 }
2248
2249 static void cnic_init_bnx2_rx_ring(struct cnic_dev *dev)
2250 {
2251 struct cnic_local *cp = dev->cnic_priv;
2252 struct cnic_eth_dev *ethdev = cp->ethdev;
2253 u32 cid_addr, sb_id, val, coal_reg, coal_val;
2254 int i;
2255 struct rx_bd *rxbd;
2256 struct status_block *s_blk = cp->status_blk;
2257
2258 sb_id = cp->status_blk_num;
2259 cnic_init_context(dev, 2);
2260 cp->rx_cons_ptr = &s_blk->status_rx_quick_consumer_index2;
2261 coal_reg = BNX2_HC_COMMAND;
2262 coal_val = CNIC_RD(dev, coal_reg);
2263 if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2264 struct status_block_msix *sblk = cp->status_blk;
2265
2266 cp->rx_cons_ptr = &sblk->status_rx_quick_consumer_index;
2267 coal_reg = BNX2_HC_COALESCE_NOW;
2268 coal_val = 1 << (11 + sb_id);
2269 }
2270 i = 0;
2271 while (!(*cp->rx_cons_ptr != 0) && i < 10) {
2272 CNIC_WR(dev, coal_reg, coal_val);
2273 udelay(10);
2274 i++;
2275 barrier();
2276 }
2277 cp->rx_cons = *cp->rx_cons_ptr;
2278
2279 cid_addr = GET_CID_ADDR(2);
2280 val = BNX2_L2CTX_CTX_TYPE_CTX_BD_CHN_TYPE_VALUE |
2281 BNX2_L2CTX_CTX_TYPE_SIZE_L2 | (0x02 << 8);
2282 cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_CTX_TYPE, val);
2283
2284 if (sb_id == 0)
2285 val = 2 << BNX2_L2CTX_STATUSB_NUM_SHIFT;
2286 else
2287 val = BNX2_L2CTX_STATUSB_NUM(sb_id);
2288 cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_HOST_BDIDX, val);
2289
2290 rxbd = (struct rx_bd *) (cp->l2_ring + BCM_PAGE_SIZE);
2291 for (i = 0; i < MAX_RX_DESC_CNT; i++, rxbd++) {
2292 dma_addr_t buf_map;
2293 int n = (i % cp->l2_rx_ring_size) + 1;
2294
2295 buf_map = cp->l2_buf_map + (n * cp->l2_single_buf_size);
2296 rxbd->rx_bd_len = cp->l2_single_buf_size;
2297 rxbd->rx_bd_flags = RX_BD_FLAGS_START | RX_BD_FLAGS_END;
2298 rxbd->rx_bd_haddr_hi = (u64) buf_map >> 32;
2299 rxbd->rx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2300 }
2301 val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) >> 32;
2302 cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_HI, val);
2303 rxbd->rx_bd_haddr_hi = val;
2304
2305 val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) & 0xffffffff;
2306 cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_LO, val);
2307 rxbd->rx_bd_haddr_lo = val;
2308
2309 val = cnic_reg_rd_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD);
2310 cnic_reg_wr_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD, val | (1 << 2));
2311 }
2312
2313 static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *dev)
2314 {
2315 struct kwqe *wqes[1], l2kwqe;
2316
2317 memset(&l2kwqe, 0, sizeof(l2kwqe));
2318 wqes[0] = &l2kwqe;
2319 l2kwqe.kwqe_op_flag = (L2_LAYER_CODE << KWQE_FLAGS_LAYER_SHIFT) |
2320 (L2_KWQE_OPCODE_VALUE_FLUSH <<
2321 KWQE_OPCODE_SHIFT) | 2;
2322 dev->submit_kwqes(dev, wqes, 1);
2323 }
2324
2325 static void cnic_set_bnx2_mac(struct cnic_dev *dev)
2326 {
2327 struct cnic_local *cp = dev->cnic_priv;
2328 u32 val;
2329
2330 val = cp->func << 2;
2331
2332 cp->shmem_base = cnic_reg_rd_ind(dev, BNX2_SHM_HDR_ADDR_0 + val);
2333
2334 val = cnic_reg_rd_ind(dev, cp->shmem_base +
2335 BNX2_PORT_HW_CFG_ISCSI_MAC_UPPER);
2336 dev->mac_addr[0] = (u8) (val >> 8);
2337 dev->mac_addr[1] = (u8) val;
2338
2339 CNIC_WR(dev, BNX2_EMAC_MAC_MATCH4, val);
2340
2341 val = cnic_reg_rd_ind(dev, cp->shmem_base +
2342 BNX2_PORT_HW_CFG_ISCSI_MAC_LOWER);
2343 dev->mac_addr[2] = (u8) (val >> 24);
2344 dev->mac_addr[3] = (u8) (val >> 16);
2345 dev->mac_addr[4] = (u8) (val >> 8);
2346 dev->mac_addr[5] = (u8) val;
2347
2348 CNIC_WR(dev, BNX2_EMAC_MAC_MATCH5, val);
2349
2350 val = 4 | BNX2_RPM_SORT_USER2_BC_EN;
2351 if (CHIP_NUM(cp) != CHIP_NUM_5709)
2352 val |= BNX2_RPM_SORT_USER2_PROM_VLAN;
2353
2354 CNIC_WR(dev, BNX2_RPM_SORT_USER2, 0x0);
2355 CNIC_WR(dev, BNX2_RPM_SORT_USER2, val);
2356 CNIC_WR(dev, BNX2_RPM_SORT_USER2, val | BNX2_RPM_SORT_USER2_ENA);
2357 }
2358
2359 static int cnic_start_bnx2_hw(struct cnic_dev *dev)
2360 {
2361 struct cnic_local *cp = dev->cnic_priv;
2362 struct cnic_eth_dev *ethdev = cp->ethdev;
2363 struct status_block *sblk = cp->status_blk;
2364 u32 val;
2365 int err;
2366
2367 cnic_set_bnx2_mac(dev);
2368
2369 val = CNIC_RD(dev, BNX2_MQ_CONFIG);
2370 val &= ~BNX2_MQ_CONFIG_KNL_BYP_BLK_SIZE;
2371 if (BCM_PAGE_BITS > 12)
2372 val |= (12 - 8) << 4;
2373 else
2374 val |= (BCM_PAGE_BITS - 8) << 4;
2375
2376 CNIC_WR(dev, BNX2_MQ_CONFIG, val);
2377
2378 CNIC_WR(dev, BNX2_HC_COMP_PROD_TRIP, (2 << 16) | 8);
2379 CNIC_WR(dev, BNX2_HC_COM_TICKS, (64 << 16) | 220);
2380 CNIC_WR(dev, BNX2_HC_CMD_TICKS, (64 << 16) | 220);
2381
2382 err = cnic_setup_5709_context(dev, 1);
2383 if (err)
2384 return err;
2385
2386 cnic_init_context(dev, KWQ_CID);
2387 cnic_init_context(dev, KCQ_CID);
2388
2389 cp->kwq_cid_addr = GET_CID_ADDR(KWQ_CID);
2390 cp->kwq_io_addr = MB_GET_CID_ADDR(KWQ_CID) + L5_KRNLQ_HOST_QIDX;
2391
2392 cp->max_kwq_idx = MAX_KWQ_IDX;
2393 cp->kwq_prod_idx = 0;
2394 cp->kwq_con_idx = 0;
2395 cp->cnic_local_flags |= CNIC_LCL_FL_KWQ_INIT;
2396
2397 if (CHIP_NUM(cp) == CHIP_NUM_5706 || CHIP_NUM(cp) == CHIP_NUM_5708)
2398 cp->kwq_con_idx_ptr = &sblk->status_rx_quick_consumer_index15;
2399 else
2400 cp->kwq_con_idx_ptr = &sblk->status_cmd_consumer_index;
2401
2402 /* Initialize the kernel work queue context. */
2403 val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2404 (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2405 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_TYPE, val);
2406
2407 val = (BCM_PAGE_SIZE / sizeof(struct kwqe) - 1) << 16;
2408 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2409
2410 val = ((BCM_PAGE_SIZE / sizeof(struct kwqe)) << 16) | KWQ_PAGE_CNT;
2411 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2412
2413 val = (u32) ((u64) cp->kwq_info.pgtbl_map >> 32);
2414 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2415
2416 val = (u32) cp->kwq_info.pgtbl_map;
2417 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2418
2419 cp->kcq_cid_addr = GET_CID_ADDR(KCQ_CID);
2420 cp->kcq_io_addr = MB_GET_CID_ADDR(KCQ_CID) + L5_KRNLQ_HOST_QIDX;
2421
2422 cp->kcq_prod_idx = 0;
2423
2424 /* Initialize the kernel complete queue context. */
2425 val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2426 (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2427 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_TYPE, val);
2428
2429 val = (BCM_PAGE_SIZE / sizeof(struct kcqe) - 1) << 16;
2430 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2431
2432 val = ((BCM_PAGE_SIZE / sizeof(struct kcqe)) << 16) | KCQ_PAGE_CNT;
2433 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2434
2435 val = (u32) ((u64) cp->kcq_info.pgtbl_map >> 32);
2436 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2437
2438 val = (u32) cp->kcq_info.pgtbl_map;
2439 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2440
2441 cp->int_num = 0;
2442 if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2443 u32 sb_id = cp->status_blk_num;
2444 u32 sb = BNX2_L2CTX_STATUSB_NUM(sb_id);
2445
2446 cp->int_num = sb_id << BNX2_PCICFG_INT_ACK_CMD_INT_NUM_SHIFT;
2447 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2448 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2449 }
2450
2451 /* Enable Commnad Scheduler notification when we write to the
2452 * host producer index of the kernel contexts. */
2453 CNIC_WR(dev, BNX2_MQ_KNL_CMD_MASK1, 2);
2454
2455 /* Enable Command Scheduler notification when we write to either
2456 * the Send Queue or Receive Queue producer indexes of the kernel
2457 * bypass contexts. */
2458 CNIC_WR(dev, BNX2_MQ_KNL_BYP_CMD_MASK1, 7);
2459 CNIC_WR(dev, BNX2_MQ_KNL_BYP_WRITE_MASK1, 7);
2460
2461 /* Notify COM when the driver post an application buffer. */
2462 CNIC_WR(dev, BNX2_MQ_KNL_RX_V2P_MASK2, 0x2000);
2463
2464 /* Set the CP and COM doorbells. These two processors polls the
2465 * doorbell for a non zero value before running. This must be done
2466 * after setting up the kernel queue contexts. */
2467 cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 1);
2468 cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 1);
2469
2470 cnic_init_bnx2_tx_ring(dev);
2471 cnic_init_bnx2_rx_ring(dev);
2472
2473 err = cnic_init_bnx2_irq(dev);
2474 if (err) {
2475 printk(KERN_ERR PFX "%s: cnic_init_irq failed\n",
2476 dev->netdev->name);
2477 cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2478 cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2479 return err;
2480 }
2481
2482 return 0;
2483 }
2484
2485 static void cnic_init_rings(struct cnic_dev *dev)
2486 {
2487 if (test_bit(CNIC_F_BNX2_CLASS, &dev->flags)) {
2488 cnic_init_bnx2_tx_ring(dev);
2489 cnic_init_bnx2_rx_ring(dev);
2490 }
2491 }
2492
2493 static void cnic_shutdown_rings(struct cnic_dev *dev)
2494 {
2495 if (test_bit(CNIC_F_BNX2_CLASS, &dev->flags)) {
2496 cnic_shutdown_bnx2_rx_ring(dev);
2497 }
2498 }
2499
2500 static int cnic_register_netdev(struct cnic_dev *dev)
2501 {
2502 struct cnic_local *cp = dev->cnic_priv;
2503 struct cnic_eth_dev *ethdev = cp->ethdev;
2504 int err;
2505
2506 if (!ethdev)
2507 return -ENODEV;
2508
2509 if (ethdev->drv_state & CNIC_DRV_STATE_REGD)
2510 return 0;
2511
2512 err = ethdev->drv_register_cnic(dev->netdev, cp->cnic_ops, dev);
2513 if (err)
2514 printk(KERN_ERR PFX "%s: register_cnic failed\n",
2515 dev->netdev->name);
2516
2517 return err;
2518 }
2519
2520 static void cnic_unregister_netdev(struct cnic_dev *dev)
2521 {
2522 struct cnic_local *cp = dev->cnic_priv;
2523 struct cnic_eth_dev *ethdev = cp->ethdev;
2524
2525 if (!ethdev)
2526 return;
2527
2528 ethdev->drv_unregister_cnic(dev->netdev);
2529 }
2530
2531 static int cnic_start_hw(struct cnic_dev *dev)
2532 {
2533 struct cnic_local *cp = dev->cnic_priv;
2534 struct cnic_eth_dev *ethdev = cp->ethdev;
2535 int err;
2536
2537 if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
2538 return -EALREADY;
2539
2540 dev->regview = ethdev->io_base;
2541 cp->chip_id = ethdev->chip_id;
2542 pci_dev_get(dev->pcidev);
2543 cp->func = PCI_FUNC(dev->pcidev->devfn);
2544 cp->status_blk = ethdev->irq_arr[0].status_blk;
2545 cp->status_blk_num = ethdev->irq_arr[0].status_blk_num;
2546
2547 err = cp->alloc_resc(dev);
2548 if (err) {
2549 printk(KERN_ERR PFX "%s: allocate resource failure\n",
2550 dev->netdev->name);
2551 goto err1;
2552 }
2553
2554 err = cp->start_hw(dev);
2555 if (err)
2556 goto err1;
2557
2558 err = cnic_cm_open(dev);
2559 if (err)
2560 goto err1;
2561
2562 set_bit(CNIC_F_CNIC_UP, &dev->flags);
2563
2564 cp->enable_int(dev);
2565
2566 return 0;
2567
2568 err1:
2569 cp->free_resc(dev);
2570 pci_dev_put(dev->pcidev);
2571 return err;
2572 }
2573
2574 static void cnic_stop_bnx2_hw(struct cnic_dev *dev)
2575 {
2576 cnic_disable_bnx2_int_sync(dev);
2577
2578 cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2579 cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2580
2581 cnic_init_context(dev, KWQ_CID);
2582 cnic_init_context(dev, KCQ_CID);
2583
2584 cnic_setup_5709_context(dev, 0);
2585 cnic_free_irq(dev);
2586
2587 cnic_free_resc(dev);
2588 }
2589
2590 static void cnic_stop_hw(struct cnic_dev *dev)
2591 {
2592 if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2593 struct cnic_local *cp = dev->cnic_priv;
2594
2595 clear_bit(CNIC_F_CNIC_UP, &dev->flags);
2596 rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], NULL);
2597 synchronize_rcu();
2598 cnic_cm_shutdown(dev);
2599 cp->stop_hw(dev);
2600 pci_dev_put(dev->pcidev);
2601 }
2602 }
2603
2604 static void cnic_free_dev(struct cnic_dev *dev)
2605 {
2606 int i = 0;
2607
2608 while ((atomic_read(&dev->ref_count) != 0) && i < 10) {
2609 msleep(100);
2610 i++;
2611 }
2612 if (atomic_read(&dev->ref_count) != 0)
2613 printk(KERN_ERR PFX "%s: Failed waiting for ref count to go"
2614 " to zero.\n", dev->netdev->name);
2615
2616 printk(KERN_INFO PFX "Removed CNIC device: %s\n", dev->netdev->name);
2617 dev_put(dev->netdev);
2618 kfree(dev);
2619 }
2620
2621 static struct cnic_dev *cnic_alloc_dev(struct net_device *dev,
2622 struct pci_dev *pdev)
2623 {
2624 struct cnic_dev *cdev;
2625 struct cnic_local *cp;
2626 int alloc_size;
2627
2628 alloc_size = sizeof(struct cnic_dev) + sizeof(struct cnic_local);
2629
2630 cdev = kzalloc(alloc_size , GFP_KERNEL);
2631 if (cdev == NULL) {
2632 printk(KERN_ERR PFX "%s: allocate dev struct failure\n",
2633 dev->name);
2634 return NULL;
2635 }
2636
2637 cdev->netdev = dev;
2638 cdev->cnic_priv = (char *)cdev + sizeof(struct cnic_dev);
2639 cdev->register_device = cnic_register_device;
2640 cdev->unregister_device = cnic_unregister_device;
2641 cdev->iscsi_nl_msg_recv = cnic_iscsi_nl_msg_recv;
2642
2643 cp = cdev->cnic_priv;
2644 cp->dev = cdev;
2645 cp->uio_dev = -1;
2646 cp->l2_single_buf_size = 0x400;
2647 cp->l2_rx_ring_size = 3;
2648
2649 spin_lock_init(&cp->cnic_ulp_lock);
2650
2651 printk(KERN_INFO PFX "Added CNIC device: %s\n", dev->name);
2652
2653 return cdev;
2654 }
2655
2656 static struct cnic_dev *init_bnx2_cnic(struct net_device *dev)
2657 {
2658 struct pci_dev *pdev;
2659 struct cnic_dev *cdev;
2660 struct cnic_local *cp;
2661 struct cnic_eth_dev *ethdev = NULL;
2662 struct cnic_eth_dev *(*probe)(struct net_device *) = NULL;
2663
2664 probe = symbol_get(bnx2_cnic_probe);
2665 if (probe) {
2666 ethdev = (*probe)(dev);
2667 symbol_put(bnx2_cnic_probe);
2668 }
2669 if (!ethdev)
2670 return NULL;
2671
2672 pdev = ethdev->pdev;
2673 if (!pdev)
2674 return NULL;
2675
2676 dev_hold(dev);
2677 pci_dev_get(pdev);
2678 if (pdev->device == PCI_DEVICE_ID_NX2_5709 ||
2679 pdev->device == PCI_DEVICE_ID_NX2_5709S) {
2680 u8 rev;
2681
2682 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
2683 if (rev < 0x10) {
2684 pci_dev_put(pdev);
2685 goto cnic_err;
2686 }
2687 }
2688 pci_dev_put(pdev);
2689
2690 cdev = cnic_alloc_dev(dev, pdev);
2691 if (cdev == NULL)
2692 goto cnic_err;
2693
2694 set_bit(CNIC_F_BNX2_CLASS, &cdev->flags);
2695 cdev->submit_kwqes = cnic_submit_bnx2_kwqes;
2696
2697 cp = cdev->cnic_priv;
2698 cp->ethdev = ethdev;
2699 cdev->pcidev = pdev;
2700
2701 cp->cnic_ops = &cnic_bnx2_ops;
2702 cp->start_hw = cnic_start_bnx2_hw;
2703 cp->stop_hw = cnic_stop_bnx2_hw;
2704 cp->setup_pgtbl = cnic_setup_page_tbl;
2705 cp->alloc_resc = cnic_alloc_bnx2_resc;
2706 cp->free_resc = cnic_free_resc;
2707 cp->start_cm = cnic_cm_init_bnx2_hw;
2708 cp->stop_cm = cnic_cm_stop_bnx2_hw;
2709 cp->enable_int = cnic_enable_bnx2_int;
2710 cp->disable_int_sync = cnic_disable_bnx2_int_sync;
2711 cp->close_conn = cnic_close_bnx2_conn;
2712 cp->next_idx = cnic_bnx2_next_idx;
2713 cp->hw_idx = cnic_bnx2_hw_idx;
2714 return cdev;
2715
2716 cnic_err:
2717 dev_put(dev);
2718 return NULL;
2719 }
2720
2721 static struct cnic_dev *is_cnic_dev(struct net_device *dev)
2722 {
2723 struct ethtool_drvinfo drvinfo;
2724 struct cnic_dev *cdev = NULL;
2725
2726 if (dev->ethtool_ops && dev->ethtool_ops->get_drvinfo) {
2727 memset(&drvinfo, 0, sizeof(drvinfo));
2728 dev->ethtool_ops->get_drvinfo(dev, &drvinfo);
2729
2730 if (!strcmp(drvinfo.driver, "bnx2"))
2731 cdev = init_bnx2_cnic(dev);
2732 if (cdev) {
2733 write_lock(&cnic_dev_lock);
2734 list_add(&cdev->list, &cnic_dev_list);
2735 write_unlock(&cnic_dev_lock);
2736 }
2737 }
2738 return cdev;
2739 }
2740
2741 /**
2742 * netdev event handler
2743 */
2744 static int cnic_netdev_event(struct notifier_block *this, unsigned long event,
2745 void *ptr)
2746 {
2747 struct net_device *netdev = ptr;
2748 struct cnic_dev *dev;
2749 int if_type;
2750 int new_dev = 0;
2751
2752 dev = cnic_from_netdev(netdev);
2753
2754 if (!dev && (event == NETDEV_REGISTER || event == NETDEV_UP)) {
2755 /* Check for the hot-plug device */
2756 dev = is_cnic_dev(netdev);
2757 if (dev) {
2758 new_dev = 1;
2759 cnic_hold(dev);
2760 }
2761 }
2762 if (dev) {
2763 struct cnic_local *cp = dev->cnic_priv;
2764
2765 if (new_dev)
2766 cnic_ulp_init(dev);
2767 else if (event == NETDEV_UNREGISTER)
2768 cnic_ulp_exit(dev);
2769
2770 if (event == NETDEV_UP) {
2771 if (cnic_register_netdev(dev) != 0) {
2772 cnic_put(dev);
2773 goto done;
2774 }
2775 if (!cnic_start_hw(dev))
2776 cnic_ulp_start(dev);
2777 }
2778
2779 rcu_read_lock();
2780 for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
2781 struct cnic_ulp_ops *ulp_ops;
2782 void *ctx;
2783
2784 ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
2785 if (!ulp_ops || !ulp_ops->indicate_netevent)
2786 continue;
2787
2788 ctx = cp->ulp_handle[if_type];
2789
2790 ulp_ops->indicate_netevent(ctx, event);
2791 }
2792 rcu_read_unlock();
2793
2794 if (event == NETDEV_GOING_DOWN) {
2795 cnic_ulp_stop(dev);
2796 cnic_stop_hw(dev);
2797 cnic_unregister_netdev(dev);
2798 } else if (event == NETDEV_UNREGISTER) {
2799 write_lock(&cnic_dev_lock);
2800 list_del_init(&dev->list);
2801 write_unlock(&cnic_dev_lock);
2802
2803 cnic_put(dev);
2804 cnic_free_dev(dev);
2805 goto done;
2806 }
2807 cnic_put(dev);
2808 }
2809 done:
2810 return NOTIFY_DONE;
2811 }
2812
2813 static struct notifier_block cnic_netdev_notifier = {
2814 .notifier_call = cnic_netdev_event
2815 };
2816
2817 static void cnic_release(void)
2818 {
2819 struct cnic_dev *dev;
2820
2821 while (!list_empty(&cnic_dev_list)) {
2822 dev = list_entry(cnic_dev_list.next, struct cnic_dev, list);
2823 if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2824 cnic_ulp_stop(dev);
2825 cnic_stop_hw(dev);
2826 }
2827
2828 cnic_ulp_exit(dev);
2829 cnic_unregister_netdev(dev);
2830 list_del_init(&dev->list);
2831 cnic_free_dev(dev);
2832 }
2833 }
2834
2835 static int __init cnic_init(void)
2836 {
2837 int rc = 0;
2838
2839 printk(KERN_INFO "%s", version);
2840
2841 rc = register_netdevice_notifier(&cnic_netdev_notifier);
2842 if (rc) {
2843 cnic_release();
2844 return rc;
2845 }
2846
2847 return 0;
2848 }
2849
2850 static void __exit cnic_exit(void)
2851 {
2852 unregister_netdevice_notifier(&cnic_netdev_notifier);
2853 cnic_release();
2854 return;
2855 }
2856
2857 module_init(cnic_init);
2858 module_exit(cnic_exit);
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