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irda: convert to netdev_tx_t
[deliverable/linux.git] / drivers / net / cnic.c
CommitLineData
a4636960
MC		 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
46static char version[] __devinitdata =
47 "Broadcom NetXtreme II CNIC Driver " DRV_MODULE_NAME " v" CNIC_MODULE_VERSION " (" CNIC_MODULE_RELDATE ")\n";
48
49MODULE_AUTHOR("Michael Chan <mchan@broadcom.com> and John(Zongxi) "
50 "Chen (zongxi@broadcom.com");
51MODULE_DESCRIPTION("Broadcom NetXtreme II CNIC Driver");
52MODULE_LICENSE("GPL");
53MODULE_VERSION(CNIC_MODULE_VERSION);
54
55static LIST_HEAD(cnic_dev_list);
56static DEFINE_RWLOCK(cnic_dev_lock);
57static DEFINE_MUTEX(cnic_lock);
58
59static struct cnic_ulp_ops *cnic_ulp_tbl[MAX_CNIC_ULP_TYPE];
60
61static int cnic_service_bnx2(void *, void *);
62static int cnic_ctl(void *, struct cnic_ctl_info *);
63
64static struct cnic_ops cnic_bnx2_ops = {
65 .cnic_owner = THIS_MODULE,
66 .cnic_handler = cnic_service_bnx2,
67 .cnic_ctl = cnic_ctl,
68};
69
70static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *);
71static void cnic_init_bnx2_tx_ring(struct cnic_dev *);
72static void cnic_init_bnx2_rx_ring(struct cnic_dev *);
73static int cnic_cm_set_pg(struct cnic_sock *);
74
75static 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_shutdown_bnx2_rx_ring(dev);
89
90 cnic_init_bnx2_tx_ring(dev);
91 cnic_init_bnx2_rx_ring(dev);
92
93 return 0;
94}
95
96static int cnic_uio_close(struct uio_info *uinfo, struct inode *inode)
97{
98 struct cnic_dev *dev = uinfo->priv;
99 struct cnic_local *cp = dev->cnic_priv;
100
101 cp->uio_dev = -1;
102 return 0;
103}
104
105static inline void cnic_hold(struct cnic_dev *dev)
106{
107 atomic_inc(&dev->ref_count);
108}
109
110static inline void cnic_put(struct cnic_dev *dev)
111{
112 atomic_dec(&dev->ref_count);
113}
114
115static inline void csk_hold(struct cnic_sock *csk)
116{
117 atomic_inc(&csk->ref_count);
118}
119
120static inline void csk_put(struct cnic_sock *csk)
121{
122 atomic_dec(&csk->ref_count);
123}
124
125static 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
141static void cnic_ctx_wr(struct cnic_dev *dev, u32 cid_addr, u32 off, u32 val)
142{
143 struct cnic_local *cp = dev->cnic_priv;
144 struct cnic_eth_dev *ethdev = cp->ethdev;
145 struct drv_ctl_info info;
146 struct drv_ctl_io *io = &info.data.io;
147
148 info.cmd = DRV_CTL_CTX_WR_CMD;
149 io->cid_addr = cid_addr;
150 io->offset = off;
151 io->data = val;
152 ethdev->drv_ctl(dev->netdev, &info);
153}
154
155static void cnic_reg_wr_ind(struct cnic_dev *dev, u32 off, u32 val)
156{
157 struct cnic_local *cp = dev->cnic_priv;
158 struct cnic_eth_dev *ethdev = cp->ethdev;
159 struct drv_ctl_info info;
160 struct drv_ctl_io *io = &info.data.io;
161
162 info.cmd = DRV_CTL_IO_WR_CMD;
163 io->offset = off;
164 io->data = val;
165 ethdev->drv_ctl(dev->netdev, &info);
166}
167
168static u32 cnic_reg_rd_ind(struct cnic_dev *dev, u32 off)
169{
170 struct cnic_local *cp = dev->cnic_priv;
171 struct cnic_eth_dev *ethdev = cp->ethdev;
172 struct drv_ctl_info info;
173 struct drv_ctl_io *io = &info.data.io;
174
175 info.cmd = DRV_CTL_IO_RD_CMD;
176 io->offset = off;
177 ethdev->drv_ctl(dev->netdev, &info);
178 return io->data;
179}
180
181static int cnic_in_use(struct cnic_sock *csk)
182{
183 return test_bit(SK_F_INUSE, &csk->flags);
184}
185
186static void cnic_kwq_completion(struct cnic_dev *dev, u32 count)
187{
188 struct cnic_local *cp = dev->cnic_priv;
189 struct cnic_eth_dev *ethdev = cp->ethdev;
190 struct drv_ctl_info info;
191
192 info.cmd = DRV_CTL_COMPLETION_CMD;
193 info.data.comp.comp_count = count;
194 ethdev->drv_ctl(dev->netdev, &info);
195}
196
197static int cnic_send_nlmsg(struct cnic_local *cp, u32 type,
198 struct cnic_sock *csk)
199{
200 struct iscsi_path path_req;
201 char *buf = NULL;
202 u16 len = 0;
203 u32 msg_type = ISCSI_KEVENT_IF_DOWN;
204 struct cnic_ulp_ops *ulp_ops;
205
206 if (cp->uio_dev == -1)
207 return -ENODEV;
208
209 if (csk) {
210 len = sizeof(path_req);
211 buf = (char *) &path_req;
212 memset(&path_req, 0, len);
213
214 msg_type = ISCSI_KEVENT_PATH_REQ;
215 path_req.handle = (u64) csk->l5_cid;
216 if (test_bit(SK_F_IPV6, &csk->flags)) {
217 memcpy(&path_req.dst.v6_addr, &csk->dst_ip[0],
218 sizeof(struct in6_addr));
219 path_req.ip_addr_len = 16;
220 } else {
221 memcpy(&path_req.dst.v4_addr, &csk->dst_ip[0],
222 sizeof(struct in_addr));
223 path_req.ip_addr_len = 4;
224 }
225 path_req.vlan_id = csk->vlan_id;
226 path_req.pmtu = csk->mtu;
227 }
228
229 rcu_read_lock();
6d7760a8 230 ulp_ops = rcu_dereference(cnic_ulp_tbl[CNIC_ULP_ISCSI]);
a4636960
MC		 231 if (ulp_ops)
232 ulp_ops->iscsi_nl_send_msg(cp->dev, msg_type, buf, len);
233 rcu_read_unlock();
234 return 0;
235}
236
237static int cnic_iscsi_nl_msg_recv(struct cnic_dev *dev, u32 msg_type,
238 char *buf, u16 len)
239{
240 int rc = -EINVAL;
241
242 switch (msg_type) {
243 case ISCSI_UEVENT_PATH_UPDATE: {
244 struct cnic_local *cp;
245 u32 l5_cid;
246 struct cnic_sock *csk;
247 struct iscsi_path *path_resp;
248
249 if (len < sizeof(*path_resp))
250 break;
251
252 path_resp = (struct iscsi_path *) buf;
253 cp = dev->cnic_priv;
254 l5_cid = (u32) path_resp->handle;
255 if (l5_cid >= MAX_CM_SK_TBL_SZ)
256 break;
257
258 csk = &cp->csk_tbl[l5_cid];
259 csk_hold(csk);
260 if (cnic_in_use(csk)) {
261 memcpy(csk->ha, path_resp->mac_addr, 6);
262 if (test_bit(SK_F_IPV6, &csk->flags))
263 memcpy(&csk->src_ip[0], &path_resp->src.v6_addr,
264 sizeof(struct in6_addr));
265 else
266 memcpy(&csk->src_ip[0], &path_resp->src.v4_addr,
267 sizeof(struct in_addr));
268 if (is_valid_ether_addr(csk->ha))
269 cnic_cm_set_pg(csk);
270 }
271 csk_put(csk);
272 rc = 0;
273 }
274 }
275
276 return rc;
277}
278
279static int cnic_offld_prep(struct cnic_sock *csk)
280{
281 if (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
282 return 0;
283
284 if (!test_bit(SK_F_CONNECT_START, &csk->flags)) {
285 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
286 return 0;
287 }
288
289 return 1;
290}
291
292static int cnic_close_prep(struct cnic_sock *csk)
293{
294 clear_bit(SK_F_CONNECT_START, &csk->flags);
295 smp_mb__after_clear_bit();
296
297 if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags)) {
298 while (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
299 msleep(1);
300
301 return 1;
302 }
303 return 0;
304}
305
306static int cnic_abort_prep(struct cnic_sock *csk)
307{
308 clear_bit(SK_F_CONNECT_START, &csk->flags);
309 smp_mb__after_clear_bit();
310
311 while (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
312 msleep(1);
313
314 if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags)) {
315 csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
316 return 1;
317 }
318
319 return 0;
320}
321
6d7760a8
MC		 322static void cnic_uio_stop(void)
323{
324 struct cnic_dev *dev;
325
326 read_lock(&cnic_dev_lock);
327 list_for_each_entry(dev, &cnic_dev_list, list) {
328 struct cnic_local *cp = dev->cnic_priv;
329
330 if (cp->cnic_uinfo)
331 cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
332 }
333 read_unlock(&cnic_dev_lock);
334}
335
a4636960
MC		 336int cnic_register_driver(int ulp_type, struct cnic_ulp_ops *ulp_ops)
337{
338 struct cnic_dev *dev;
339
340 if (ulp_type >= MAX_CNIC_ULP_TYPE) {
341 printk(KERN_ERR PFX "cnic_register_driver: Bad type %d\n",
342 ulp_type);
343 return -EINVAL;
344 }
345 mutex_lock(&cnic_lock);
346 if (cnic_ulp_tbl[ulp_type]) {
347 printk(KERN_ERR PFX "cnic_register_driver: Type %d has already "
348 "been registered\n", ulp_type);
349 mutex_unlock(&cnic_lock);
350 return -EBUSY;
351 }
352
353 read_lock(&cnic_dev_lock);
354 list_for_each_entry(dev, &cnic_dev_list, list) {
355 struct cnic_local *cp = dev->cnic_priv;
356
357 clear_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]);
358 }
359 read_unlock(&cnic_dev_lock);
360
361 rcu_assign_pointer(cnic_ulp_tbl[ulp_type], ulp_ops);
362 mutex_unlock(&cnic_lock);
363
364 /* Prevent race conditions with netdev_event */
365 rtnl_lock();
366 read_lock(&cnic_dev_lock);
367 list_for_each_entry(dev, &cnic_dev_list, list) {
368 struct cnic_local *cp = dev->cnic_priv;
369
370 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]))
371 ulp_ops->cnic_init(dev);
372 }
373 read_unlock(&cnic_dev_lock);
374 rtnl_unlock();
375
376 return 0;
377}
378
379int cnic_unregister_driver(int ulp_type)
380{
381 struct cnic_dev *dev;
382
383 if (ulp_type >= MAX_CNIC_ULP_TYPE) {
384 printk(KERN_ERR PFX "cnic_unregister_driver: Bad type %d\n",
385 ulp_type);
386 return -EINVAL;
387 }
388 mutex_lock(&cnic_lock);
389 if (!cnic_ulp_tbl[ulp_type]) {
390 printk(KERN_ERR PFX "cnic_unregister_driver: Type %d has not "
391 "been registered\n", ulp_type);
392 goto out_unlock;
393 }
394 read_lock(&cnic_dev_lock);
395 list_for_each_entry(dev, &cnic_dev_list, list) {
396 struct cnic_local *cp = dev->cnic_priv;
397
398 if (rcu_dereference(cp->ulp_ops[ulp_type])) {
399 printk(KERN_ERR PFX "cnic_unregister_driver: Type %d "
400 "still has devices registered\n", ulp_type);
401 read_unlock(&cnic_dev_lock);
402 goto out_unlock;
403 }
404 }
405 read_unlock(&cnic_dev_lock);
406
6d7760a8
MC		 407 if (ulp_type == CNIC_ULP_ISCSI)
408 cnic_uio_stop();
409
a4636960
MC		 410 rcu_assign_pointer(cnic_ulp_tbl[ulp_type], NULL);
411
412 mutex_unlock(&cnic_lock);
413 synchronize_rcu();
414 return 0;
415
416out_unlock:
417 mutex_unlock(&cnic_lock);
418 return -EINVAL;
419}
420
421static int cnic_start_hw(struct cnic_dev *);
422static void cnic_stop_hw(struct cnic_dev *);
423
424static int cnic_register_device(struct cnic_dev *dev, int ulp_type,
425 void *ulp_ctx)
426{
427 struct cnic_local *cp = dev->cnic_priv;
428 struct cnic_ulp_ops *ulp_ops;
429
430 if (ulp_type >= MAX_CNIC_ULP_TYPE) {
431 printk(KERN_ERR PFX "cnic_register_device: Bad type %d\n",
432 ulp_type);
433 return -EINVAL;
434 }
435 mutex_lock(&cnic_lock);
436 if (cnic_ulp_tbl[ulp_type] == NULL) {
437 printk(KERN_ERR PFX "cnic_register_device: Driver with type %d "
438 "has not been registered\n", ulp_type);
439 mutex_unlock(&cnic_lock);
440 return -EAGAIN;
441 }
442 if (rcu_dereference(cp->ulp_ops[ulp_type])) {
443 printk(KERN_ERR PFX "cnic_register_device: Type %d has already "
444 "been registered to this device\n", ulp_type);
445 mutex_unlock(&cnic_lock);
446 return -EBUSY;
447 }
448
449 clear_bit(ULP_F_START, &cp->ulp_flags[ulp_type]);
450 cp->ulp_handle[ulp_type] = ulp_ctx;
451 ulp_ops = cnic_ulp_tbl[ulp_type];
452 rcu_assign_pointer(cp->ulp_ops[ulp_type], ulp_ops);
453 cnic_hold(dev);
454
455 if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
456 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[ulp_type]))
457 ulp_ops->cnic_start(cp->ulp_handle[ulp_type]);
458
459 mutex_unlock(&cnic_lock);
460
461 return 0;
462
463}
464EXPORT_SYMBOL(cnic_register_driver);
465
466static int cnic_unregister_device(struct cnic_dev *dev, int ulp_type)
467{
468 struct cnic_local *cp = dev->cnic_priv;
469
470 if (ulp_type >= MAX_CNIC_ULP_TYPE) {
471 printk(KERN_ERR PFX "cnic_unregister_device: Bad type %d\n",
472 ulp_type);
473 return -EINVAL;
474 }
475 mutex_lock(&cnic_lock);
476 if (rcu_dereference(cp->ulp_ops[ulp_type])) {
477 rcu_assign_pointer(cp->ulp_ops[ulp_type], NULL);
478 cnic_put(dev);
479 } else {
480 printk(KERN_ERR PFX "cnic_unregister_device: device not "
481 "registered to this ulp type %d\n", ulp_type);
482 mutex_unlock(&cnic_lock);
483 return -EINVAL;
484 }
485 mutex_unlock(&cnic_lock);
486
487 synchronize_rcu();
488
489 return 0;
490}
491EXPORT_SYMBOL(cnic_unregister_driver);
492
493static int cnic_init_id_tbl(struct cnic_id_tbl *id_tbl, u32 size, u32 start_id)
494{
495 id_tbl->start = start_id;
496 id_tbl->max = size;
497 id_tbl->next = 0;
498 spin_lock_init(&id_tbl->lock);
499 id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
500 if (!id_tbl->table)
501 return -ENOMEM;
502
503 return 0;
504}
505
506static void cnic_free_id_tbl(struct cnic_id_tbl *id_tbl)
507{
508 kfree(id_tbl->table);
509 id_tbl->table = NULL;
510}
511
512static int cnic_alloc_id(struct cnic_id_tbl *id_tbl, u32 id)
513{
514 int ret = -1;
515
516 id -= id_tbl->start;
517 if (id >= id_tbl->max)
518 return ret;
519
520 spin_lock(&id_tbl->lock);
521 if (!test_bit(id, id_tbl->table)) {
522 set_bit(id, id_tbl->table);
523 ret = 0;
524 }
525 spin_unlock(&id_tbl->lock);
526 return ret;
527}
528
529/* Returns -1 if not successful */
530static u32 cnic_alloc_new_id(struct cnic_id_tbl *id_tbl)
531{
532 u32 id;
533
534 spin_lock(&id_tbl->lock);
535 id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
536 if (id >= id_tbl->max) {
537 id = -1;
538 if (id_tbl->next != 0) {
539 id = find_first_zero_bit(id_tbl->table, id_tbl->next);
540 if (id >= id_tbl->next)
541 id = -1;
542 }
543 }
544
545 if (id < id_tbl->max) {
546 set_bit(id, id_tbl->table);
547 id_tbl->next = (id + 1) & (id_tbl->max - 1);
548 id += id_tbl->start;
549 }
550
551 spin_unlock(&id_tbl->lock);
552
553 return id;
554}
555
556static void cnic_free_id(struct cnic_id_tbl *id_tbl, u32 id)
557{
558 if (id == -1)
559 return;
560
561 id -= id_tbl->start;
562 if (id >= id_tbl->max)
563 return;
564
565 clear_bit(id, id_tbl->table);
566}
567
568static void cnic_free_dma(struct cnic_dev *dev, struct cnic_dma *dma)
569{
570 int i;
571
572 if (!dma->pg_arr)
573 return;
574
575 for (i = 0; i < dma->num_pages; i++) {
576 if (dma->pg_arr[i]) {
577 pci_free_consistent(dev->pcidev, BCM_PAGE_SIZE,
578 dma->pg_arr[i], dma->pg_map_arr[i]);
579 dma->pg_arr[i] = NULL;
580 }
581 }
582 if (dma->pgtbl) {
583 pci_free_consistent(dev->pcidev, dma->pgtbl_size,
584 dma->pgtbl, dma->pgtbl_map);
585 dma->pgtbl = NULL;
586 }
587 kfree(dma->pg_arr);
588 dma->pg_arr = NULL;
589 dma->num_pages = 0;
590}
591
592static void cnic_setup_page_tbl(struct cnic_dev *dev, struct cnic_dma *dma)
593{
594 int i;
595 u32 *page_table = dma->pgtbl;
596
597 for (i = 0; i < dma->num_pages; i++) {
598 /* Each entry needs to be in big endian format. */
599 *page_table = (u32) ((u64) dma->pg_map_arr[i] >> 32);
600 page_table++;
601 *page_table = (u32) dma->pg_map_arr[i];
602 page_table++;
603 }
604}
605
606static int cnic_alloc_dma(struct cnic_dev *dev, struct cnic_dma *dma,
607 int pages, int use_pg_tbl)
608{
609 int i, size;
610 struct cnic_local *cp = dev->cnic_priv;
611
612 size = pages * (sizeof(void *) + sizeof(dma_addr_t));
613 dma->pg_arr = kzalloc(size, GFP_ATOMIC);
614 if (dma->pg_arr == NULL)
615 return -ENOMEM;
616
617 dma->pg_map_arr = (dma_addr_t *) (dma->pg_arr + pages);
618 dma->num_pages = pages;
619
620 for (i = 0; i < pages; i++) {
621 dma->pg_arr[i] = pci_alloc_consistent(dev->pcidev,
622 BCM_PAGE_SIZE,
623 &dma->pg_map_arr[i]);
624 if (dma->pg_arr[i] == NULL)
625 goto error;
626 }
627 if (!use_pg_tbl)
628 return 0;
629
630 dma->pgtbl_size = ((pages * 8) + BCM_PAGE_SIZE - 1) &
631 ~(BCM_PAGE_SIZE - 1);
632 dma->pgtbl = pci_alloc_consistent(dev->pcidev, dma->pgtbl_size,
633 &dma->pgtbl_map);
634 if (dma->pgtbl == NULL)
635 goto error;
636
637 cp->setup_pgtbl(dev, dma);
638
639 return 0;
640
641error:
642 cnic_free_dma(dev, dma);
643 return -ENOMEM;
644}
645
646static void cnic_free_resc(struct cnic_dev *dev)
647{
648 struct cnic_local *cp = dev->cnic_priv;
649 int i = 0;
650
651 if (cp->cnic_uinfo) {
a4636960
MC		 652 while (cp->uio_dev != -1 && i < 15) {
653 msleep(100);
654 i++;
655 }
656 uio_unregister_device(cp->cnic_uinfo);
657 kfree(cp->cnic_uinfo);
658 cp->cnic_uinfo = NULL;
659 }
660
661 if (cp->l2_buf) {
662 pci_free_consistent(dev->pcidev, cp->l2_buf_size,
663 cp->l2_buf, cp->l2_buf_map);
664 cp->l2_buf = NULL;
665 }
666
667 if (cp->l2_ring) {
668 pci_free_consistent(dev->pcidev, cp->l2_ring_size,
669 cp->l2_ring, cp->l2_ring_map);
670 cp->l2_ring = NULL;
671 }
672
673 for (i = 0; i < cp->ctx_blks; i++) {
674 if (cp->ctx_arr[i].ctx) {
675 pci_free_consistent(dev->pcidev, cp->ctx_blk_size,
676 cp->ctx_arr[i].ctx,
677 cp->ctx_arr[i].mapping);
678 cp->ctx_arr[i].ctx = NULL;
679 }
680 }
681 kfree(cp->ctx_arr);
682 cp->ctx_arr = NULL;
683 cp->ctx_blks = 0;
684
685 cnic_free_dma(dev, &cp->gbl_buf_info);
686 cnic_free_dma(dev, &cp->conn_buf_info);
687 cnic_free_dma(dev, &cp->kwq_info);
688 cnic_free_dma(dev, &cp->kcq_info);
689 kfree(cp->iscsi_tbl);
690 cp->iscsi_tbl = NULL;
691 kfree(cp->ctx_tbl);
692 cp->ctx_tbl = NULL;
693
694 cnic_free_id_tbl(&cp->cid_tbl);
695}
696
697static int cnic_alloc_context(struct cnic_dev *dev)
698{
699 struct cnic_local *cp = dev->cnic_priv;
700
701 if (CHIP_NUM(cp) == CHIP_NUM_5709) {
702 int i, k, arr_size;
703
704 cp->ctx_blk_size = BCM_PAGE_SIZE;
705 cp->cids_per_blk = BCM_PAGE_SIZE / 128;
706 arr_size = BNX2_MAX_CID / cp->cids_per_blk *
707 sizeof(struct cnic_ctx);
708 cp->ctx_arr = kzalloc(arr_size, GFP_KERNEL);
709 if (cp->ctx_arr == NULL)
710 return -ENOMEM;
711
712 k = 0;
713 for (i = 0; i < 2; i++) {
714 u32 j, reg, off, lo, hi;
715
716 if (i == 0)
717 off = BNX2_PG_CTX_MAP;
718 else
719 off = BNX2_ISCSI_CTX_MAP;
720
721 reg = cnic_reg_rd_ind(dev, off);
722 lo = reg >> 16;
723 hi = reg & 0xffff;
724 for (j = lo; j < hi; j += cp->cids_per_blk, k++)
725 cp->ctx_arr[k].cid = j;
726 }
727
728 cp->ctx_blks = k;
729 if (cp->ctx_blks >= (BNX2_MAX_CID / cp->cids_per_blk)) {
730 cp->ctx_blks = 0;
731 return -ENOMEM;
732 }
733
734 for (i = 0; i < cp->ctx_blks; i++) {
735 cp->ctx_arr[i].ctx =
736 pci_alloc_consistent(dev->pcidev, BCM_PAGE_SIZE,
737 &cp->ctx_arr[i].mapping);
738 if (cp->ctx_arr[i].ctx == NULL)
739 return -ENOMEM;
740 }
741 }
742 return 0;
743}
744
ec0248ea
MC		 745static int cnic_alloc_l2_rings(struct cnic_dev *dev, int pages)
746{
747 struct cnic_local *cp = dev->cnic_priv;
748
749 cp->l2_ring_size = pages * BCM_PAGE_SIZE;
750 cp->l2_ring = pci_alloc_consistent(dev->pcidev, cp->l2_ring_size,
751 &cp->l2_ring_map);
752 if (!cp->l2_ring)
753 return -ENOMEM;
754
755 cp->l2_buf_size = (cp->l2_rx_ring_size + 1) * cp->l2_single_buf_size;
756 cp->l2_buf_size = PAGE_ALIGN(cp->l2_buf_size);
757 cp->l2_buf = pci_alloc_consistent(dev->pcidev, cp->l2_buf_size,
758 &cp->l2_buf_map);
759 if (!cp->l2_buf)
760 return -ENOMEM;
761
762 return 0;
763}
764
5e9b2dbf 765static int cnic_alloc_uio(struct cnic_dev *dev) {
a4636960
MC		 766 struct cnic_local *cp = dev->cnic_priv;
767 struct uio_info *uinfo;
768 int ret;
769
a4636960
MC		 770 uinfo = kzalloc(sizeof(*uinfo), GFP_ATOMIC);
771 if (!uinfo)
5e9b2dbf 772 return -ENOMEM;
a4636960
MC		 773
774 uinfo->mem[0].addr = dev->netdev->base_addr;
775 uinfo->mem[0].internal_addr = dev->regview;
776 uinfo->mem[0].size = dev->netdev->mem_end - dev->netdev->mem_start;
777 uinfo->mem[0].memtype = UIO_MEM_PHYS;
778
779 uinfo->mem[1].addr = (unsigned long) cp->status_blk & PAGE_MASK;
5e9b2dbf
MC		 780 if (test_bit(CNIC_F_BNX2_CLASS, &dev->flags)) {
781 if (cp->ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX)
782 uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE * 9;
783 else
784 uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE;
785
786 uinfo->name = "bnx2_cnic";
787 }
788
a4636960
MC		 789 uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
790
791 uinfo->mem[2].addr = (unsigned long) cp->l2_ring;
792 uinfo->mem[2].size = cp->l2_ring_size;
793 uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
794
795 uinfo->mem[3].addr = (unsigned long) cp->l2_buf;
796 uinfo->mem[3].size = cp->l2_buf_size;
797 uinfo->mem[3].memtype = UIO_MEM_LOGICAL;
798
a4636960
MC		 799 uinfo->version = CNIC_MODULE_VERSION;
800 uinfo->irq = UIO_IRQ_CUSTOM;
801
802 uinfo->open = cnic_uio_open;
803 uinfo->release = cnic_uio_close;
804
805 uinfo->priv = dev;
806
807 ret = uio_register_device(&dev->pcidev->dev, uinfo);
808 if (ret) {
809 kfree(uinfo);
5e9b2dbf 810 return ret;
a4636960
MC		 811 }
812
813 cp->cnic_uinfo = uinfo;
5e9b2dbf
MC		 814 return 0;
815}
816
817static int cnic_alloc_bnx2_resc(struct cnic_dev *dev)
818{
819 struct cnic_local *cp = dev->cnic_priv;
820 int ret;
821
822 ret = cnic_alloc_dma(dev, &cp->kwq_info, KWQ_PAGE_CNT, 1);
823 if (ret)
824 goto error;
825 cp->kwq = (struct kwqe **) cp->kwq_info.pg_arr;
826
827 ret = cnic_alloc_dma(dev, &cp->kcq_info, KCQ_PAGE_CNT, 1);
828 if (ret)
829 goto error;
830 cp->kcq = (struct kcqe **) cp->kcq_info.pg_arr;
831
832 ret = cnic_alloc_context(dev);
833 if (ret)
834 goto error;
835
836 ret = cnic_alloc_l2_rings(dev, 2);
837 if (ret)
838 goto error;
839
840 ret = cnic_alloc_uio(dev);
841 if (ret)
842 goto error;
a4636960
MC		 843
844 return 0;
845
846error:
847 cnic_free_resc(dev);
848 return ret;
849}
850
851static inline u32 cnic_kwq_avail(struct cnic_local *cp)
852{
853 return cp->max_kwq_idx -
854 ((cp->kwq_prod_idx - cp->kwq_con_idx) & cp->max_kwq_idx);
855}
856
857static int cnic_submit_bnx2_kwqes(struct cnic_dev *dev, struct kwqe *wqes[],
858 u32 num_wqes)
859{
860 struct cnic_local *cp = dev->cnic_priv;
861 struct kwqe *prod_qe;
862 u16 prod, sw_prod, i;
863
864 if (!test_bit(CNIC_F_CNIC_UP, &dev->flags))
865 return -EAGAIN; /* bnx2 is down */
866
867 spin_lock_bh(&cp->cnic_ulp_lock);
868 if (num_wqes > cnic_kwq_avail(cp) &&
869 !(cp->cnic_local_flags & CNIC_LCL_FL_KWQ_INIT)) {
870 spin_unlock_bh(&cp->cnic_ulp_lock);
871 return -EAGAIN;
872 }
873
874 cp->cnic_local_flags &= ~CNIC_LCL_FL_KWQ_INIT;
875
876 prod = cp->kwq_prod_idx;
877 sw_prod = prod & MAX_KWQ_IDX;
878 for (i = 0; i < num_wqes; i++) {
879 prod_qe = &cp->kwq[KWQ_PG(sw_prod)][KWQ_IDX(sw_prod)];
880 memcpy(prod_qe, wqes[i], sizeof(struct kwqe));
881 prod++;
882 sw_prod = prod & MAX_KWQ_IDX;
883 }
884 cp->kwq_prod_idx = prod;
885
886 CNIC_WR16(dev, cp->kwq_io_addr, cp->kwq_prod_idx);
887
888 spin_unlock_bh(&cp->cnic_ulp_lock);
889 return 0;
890}
891
892static void service_kcqes(struct cnic_dev *dev, int num_cqes)
893{
894 struct cnic_local *cp = dev->cnic_priv;
895 int i, j;
896
897 i = 0;
898 j = 1;
899 while (num_cqes) {
900 struct cnic_ulp_ops *ulp_ops;
901 int ulp_type;
902 u32 kcqe_op_flag = cp->completed_kcq[i]->kcqe_op_flag;
903 u32 kcqe_layer = kcqe_op_flag & KCQE_FLAGS_LAYER_MASK;
904
905 if (unlikely(kcqe_op_flag & KCQE_RAMROD_COMPLETION))
906 cnic_kwq_completion(dev, 1);
907
908 while (j < num_cqes) {
909 u32 next_op = cp->completed_kcq[i + j]->kcqe_op_flag;
910
911 if ((next_op & KCQE_FLAGS_LAYER_MASK) != kcqe_layer)
912 break;
913
914 if (unlikely(next_op & KCQE_RAMROD_COMPLETION))
915 cnic_kwq_completion(dev, 1);
916 j++;
917 }
918
919 if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_RDMA)
920 ulp_type = CNIC_ULP_RDMA;
921 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_ISCSI)
922 ulp_type = CNIC_ULP_ISCSI;
923 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L4)
924 ulp_type = CNIC_ULP_L4;
925 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L2)
926 goto end;
927 else {
928 printk(KERN_ERR PFX "%s: Unknown type of KCQE(0x%x)\n",
929 dev->netdev->name, kcqe_op_flag);
930 goto end;
931 }
932
933 rcu_read_lock();
934 ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
935 if (likely(ulp_ops)) {
936 ulp_ops->indicate_kcqes(cp->ulp_handle[ulp_type],
937 cp->completed_kcq + i, j);
938 }
939 rcu_read_unlock();
940end:
941 num_cqes -= j;
942 i += j;
943 j = 1;
944 }
945 return;
946}
947
948static u16 cnic_bnx2_next_idx(u16 idx)
949{
950 return idx + 1;
951}
952
953static u16 cnic_bnx2_hw_idx(u16 idx)
954{
955 return idx;
956}
957
958static int cnic_get_kcqes(struct cnic_dev *dev, u16 hw_prod, u16 *sw_prod)
959{
960 struct cnic_local *cp = dev->cnic_priv;
961 u16 i, ri, last;
962 struct kcqe *kcqe;
963 int kcqe_cnt = 0, last_cnt = 0;
964
965 i = ri = last = *sw_prod;
966 ri &= MAX_KCQ_IDX;
967
968 while ((i != hw_prod) && (kcqe_cnt < MAX_COMPLETED_KCQE)) {
969 kcqe = &cp->kcq[KCQ_PG(ri)][KCQ_IDX(ri)];
970 cp->completed_kcq[kcqe_cnt++] = kcqe;
971 i = cp->next_idx(i);
972 ri = i & MAX_KCQ_IDX;
973 if (likely(!(kcqe->kcqe_op_flag & KCQE_FLAGS_NEXT))) {
974 last_cnt = kcqe_cnt;
975 last = i;
976 }
977 }
978
979 *sw_prod = last;
980 return last_cnt;
981}
982
983static void cnic_chk_bnx2_pkt_rings(struct cnic_local *cp)
984{
985 u16 rx_cons = *cp->rx_cons_ptr;
986 u16 tx_cons = *cp->tx_cons_ptr;
987
988 if (cp->tx_cons != tx_cons || cp->rx_cons != rx_cons) {
989 cp->tx_cons = tx_cons;
990 cp->rx_cons = rx_cons;
991 uio_event_notify(cp->cnic_uinfo);
992 }
993}
994
995static int cnic_service_bnx2(void *data, void *status_blk)
996{
997 struct cnic_dev *dev = data;
998 struct status_block *sblk = status_blk;
999 struct cnic_local *cp = dev->cnic_priv;
1000 u32 status_idx = sblk->status_idx;
1001 u16 hw_prod, sw_prod;
1002 int kcqe_cnt;
1003
1004 if (unlikely(!test_bit(CNIC_F_CNIC_UP, &dev->flags)))
1005 return status_idx;
1006
1007 cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
1008
1009 hw_prod = sblk->status_completion_producer_index;
1010 sw_prod = cp->kcq_prod_idx;
1011 while (sw_prod != hw_prod) {
1012 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
1013 if (kcqe_cnt == 0)
1014 goto done;
1015
1016 service_kcqes(dev, kcqe_cnt);
1017
1018 /* Tell compiler that status_blk fields can change. */
1019 barrier();
1020 if (status_idx != sblk->status_idx) {
1021 status_idx = sblk->status_idx;
1022 cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
1023 hw_prod = sblk->status_completion_producer_index;
1024 } else
1025 break;
1026 }
1027
1028done:
1029 CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
1030
1031 cp->kcq_prod_idx = sw_prod;
1032
1033 cnic_chk_bnx2_pkt_rings(cp);
1034 return status_idx;
1035}
1036
1037static void cnic_service_bnx2_msix(unsigned long data)
1038{
1039 struct cnic_dev *dev = (struct cnic_dev *) data;
1040 struct cnic_local *cp = dev->cnic_priv;
1041 struct status_block_msix *status_blk = cp->bnx2_status_blk;
1042 u32 status_idx = status_blk->status_idx;
1043 u16 hw_prod, sw_prod;
1044 int kcqe_cnt;
1045
1046 cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1047
1048 hw_prod = status_blk->status_completion_producer_index;
1049 sw_prod = cp->kcq_prod_idx;
1050 while (sw_prod != hw_prod) {
1051 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
1052 if (kcqe_cnt == 0)
1053 goto done;
1054
1055 service_kcqes(dev, kcqe_cnt);
1056
1057 /* Tell compiler that status_blk fields can change. */
1058 barrier();
1059 if (status_idx != status_blk->status_idx) {
1060 status_idx = status_blk->status_idx;
1061 cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1062 hw_prod = status_blk->status_completion_producer_index;
1063 } else
1064 break;
1065 }
1066
1067done:
1068 CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
1069 cp->kcq_prod_idx = sw_prod;
1070
1071 cnic_chk_bnx2_pkt_rings(cp);
1072
1073 cp->last_status_idx = status_idx;
1074 CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
1075 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
1076}
1077
1078static irqreturn_t cnic_irq(int irq, void *dev_instance)
1079{
1080 struct cnic_dev *dev = dev_instance;
1081 struct cnic_local *cp = dev->cnic_priv;
1082 u16 prod = cp->kcq_prod_idx & MAX_KCQ_IDX;
1083
1084 if (cp->ack_int)
1085 cp->ack_int(dev);
1086
1087 prefetch(cp->status_blk);
1088 prefetch(&cp->kcq[KCQ_PG(prod)][KCQ_IDX(prod)]);
1089
1090 if (likely(test_bit(CNIC_F_CNIC_UP, &dev->flags)))
1091 tasklet_schedule(&cp->cnic_irq_task);
1092
1093 return IRQ_HANDLED;
1094}
1095
1096static void cnic_ulp_stop(struct cnic_dev *dev)
1097{
1098 struct cnic_local *cp = dev->cnic_priv;
1099 int if_type;
1100
6d7760a8
MC		 1101 if (cp->cnic_uinfo)
1102 cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
1103
a4636960
MC		 1104 rcu_read_lock();
1105 for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1106 struct cnic_ulp_ops *ulp_ops;
1107
1108 ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
1109 if (!ulp_ops)
1110 continue;
1111
1112 if (test_and_clear_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1113 ulp_ops->cnic_stop(cp->ulp_handle[if_type]);
1114 }
1115 rcu_read_unlock();
1116}
1117
1118static void cnic_ulp_start(struct cnic_dev *dev)
1119{
1120 struct cnic_local *cp = dev->cnic_priv;
1121 int if_type;
1122
1123 rcu_read_lock();
1124 for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1125 struct cnic_ulp_ops *ulp_ops;
1126
1127 ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
1128 if (!ulp_ops || !ulp_ops->cnic_start)
1129 continue;
1130
1131 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1132 ulp_ops->cnic_start(cp->ulp_handle[if_type]);
1133 }
1134 rcu_read_unlock();
1135}
1136
1137static int cnic_ctl(void *data, struct cnic_ctl_info *info)
1138{
1139 struct cnic_dev *dev = data;
1140
1141 switch (info->cmd) {
1142 case CNIC_CTL_STOP_CMD:
1143 cnic_hold(dev);
1144 mutex_lock(&cnic_lock);
1145
1146 cnic_ulp_stop(dev);
1147 cnic_stop_hw(dev);
1148
1149 mutex_unlock(&cnic_lock);
1150 cnic_put(dev);
1151 break;
1152 case CNIC_CTL_START_CMD:
1153 cnic_hold(dev);
1154 mutex_lock(&cnic_lock);
1155
1156 if (!cnic_start_hw(dev))
1157 cnic_ulp_start(dev);
1158
1159 mutex_unlock(&cnic_lock);
1160 cnic_put(dev);
1161 break;
1162 default:
1163 return -EINVAL;
1164 }
1165 return 0;
1166}
1167
1168static void cnic_ulp_init(struct cnic_dev *dev)
1169{
1170 int i;
1171 struct cnic_local *cp = dev->cnic_priv;
1172
1173 rcu_read_lock();
1174 for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1175 struct cnic_ulp_ops *ulp_ops;
1176
1177 ulp_ops = rcu_dereference(cnic_ulp_tbl[i]);
1178 if (!ulp_ops || !ulp_ops->cnic_init)
1179 continue;
1180
1181 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1182 ulp_ops->cnic_init(dev);
1183
1184 }
1185 rcu_read_unlock();
1186}
1187
1188static void cnic_ulp_exit(struct cnic_dev *dev)
1189{
1190 int i;
1191 struct cnic_local *cp = dev->cnic_priv;
1192
1193 rcu_read_lock();
1194 for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1195 struct cnic_ulp_ops *ulp_ops;
1196
1197 ulp_ops = rcu_dereference(cnic_ulp_tbl[i]);
1198 if (!ulp_ops || !ulp_ops->cnic_exit)
1199 continue;
1200
1201 if (test_and_clear_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1202 ulp_ops->cnic_exit(dev);
1203
1204 }
1205 rcu_read_unlock();
1206}
1207
1208static int cnic_cm_offload_pg(struct cnic_sock *csk)
1209{
1210 struct cnic_dev *dev = csk->dev;
1211 struct l4_kwq_offload_pg *l4kwqe;
1212 struct kwqe *wqes[1];
1213
1214 l4kwqe = (struct l4_kwq_offload_pg *) &csk->kwqe1;
1215 memset(l4kwqe, 0, sizeof(*l4kwqe));
1216 wqes[0] = (struct kwqe *) l4kwqe;
1217
1218 l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_OFFLOAD_PG;
1219 l4kwqe->flags =
1220 L4_LAYER_CODE << L4_KWQ_OFFLOAD_PG_LAYER_CODE_SHIFT;
1221 l4kwqe->l2hdr_nbytes = ETH_HLEN;
1222
1223 l4kwqe->da0 = csk->ha[0];
1224 l4kwqe->da1 = csk->ha[1];
1225 l4kwqe->da2 = csk->ha[2];
1226 l4kwqe->da3 = csk->ha[3];
1227 l4kwqe->da4 = csk->ha[4];
1228 l4kwqe->da5 = csk->ha[5];
1229
1230 l4kwqe->sa0 = dev->mac_addr[0];
1231 l4kwqe->sa1 = dev->mac_addr[1];
1232 l4kwqe->sa2 = dev->mac_addr[2];
1233 l4kwqe->sa3 = dev->mac_addr[3];
1234 l4kwqe->sa4 = dev->mac_addr[4];
1235 l4kwqe->sa5 = dev->mac_addr[5];
1236
1237 l4kwqe->etype = ETH_P_IP;
1238 l4kwqe->ipid_count = DEF_IPID_COUNT;
1239 l4kwqe->host_opaque = csk->l5_cid;
1240
1241 if (csk->vlan_id) {
1242 l4kwqe->pg_flags |= L4_KWQ_OFFLOAD_PG_VLAN_TAGGING;
1243 l4kwqe->vlan_tag = csk->vlan_id;
1244 l4kwqe->l2hdr_nbytes += 4;
1245 }
1246
1247 return dev->submit_kwqes(dev, wqes, 1);
1248}
1249
1250static int cnic_cm_update_pg(struct cnic_sock *csk)
1251{
1252 struct cnic_dev *dev = csk->dev;
1253 struct l4_kwq_update_pg *l4kwqe;
1254 struct kwqe *wqes[1];
1255
1256 l4kwqe = (struct l4_kwq_update_pg *) &csk->kwqe1;
1257 memset(l4kwqe, 0, sizeof(*l4kwqe));
1258 wqes[0] = (struct kwqe *) l4kwqe;
1259
1260 l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPDATE_PG;
1261 l4kwqe->flags =
1262 L4_LAYER_CODE << L4_KWQ_UPDATE_PG_LAYER_CODE_SHIFT;
1263 l4kwqe->pg_cid = csk->pg_cid;
1264
1265 l4kwqe->da0 = csk->ha[0];
1266 l4kwqe->da1 = csk->ha[1];
1267 l4kwqe->da2 = csk->ha[2];
1268 l4kwqe->da3 = csk->ha[3];
1269 l4kwqe->da4 = csk->ha[4];
1270 l4kwqe->da5 = csk->ha[5];
1271
1272 l4kwqe->pg_host_opaque = csk->l5_cid;
1273 l4kwqe->pg_valids = L4_KWQ_UPDATE_PG_VALIDS_DA;
1274
1275 return dev->submit_kwqes(dev, wqes, 1);
1276}
1277
1278static int cnic_cm_upload_pg(struct cnic_sock *csk)
1279{
1280 struct cnic_dev *dev = csk->dev;
1281 struct l4_kwq_upload *l4kwqe;
1282 struct kwqe *wqes[1];
1283
1284 l4kwqe = (struct l4_kwq_upload *) &csk->kwqe1;
1285 memset(l4kwqe, 0, sizeof(*l4kwqe));
1286 wqes[0] = (struct kwqe *) l4kwqe;
1287
1288 l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPLOAD_PG;
1289 l4kwqe->flags =
1290 L4_LAYER_CODE << L4_KWQ_UPLOAD_LAYER_CODE_SHIFT;
1291 l4kwqe->cid = csk->pg_cid;
1292
1293 return dev->submit_kwqes(dev, wqes, 1);
1294}
1295
1296static int cnic_cm_conn_req(struct cnic_sock *csk)
1297{
1298 struct cnic_dev *dev = csk->dev;
1299 struct l4_kwq_connect_req1 *l4kwqe1;
1300 struct l4_kwq_connect_req2 *l4kwqe2;
1301 struct l4_kwq_connect_req3 *l4kwqe3;
1302 struct kwqe *wqes[3];
1303 u8 tcp_flags = 0;
1304 int num_wqes = 2;
1305
1306 l4kwqe1 = (struct l4_kwq_connect_req1 *) &csk->kwqe1;
1307 l4kwqe2 = (struct l4_kwq_connect_req2 *) &csk->kwqe2;
1308 l4kwqe3 = (struct l4_kwq_connect_req3 *) &csk->kwqe3;
1309 memset(l4kwqe1, 0, sizeof(*l4kwqe1));
1310 memset(l4kwqe2, 0, sizeof(*l4kwqe2));
1311 memset(l4kwqe3, 0, sizeof(*l4kwqe3));
1312
1313 l4kwqe3->op_code = L4_KWQE_OPCODE_VALUE_CONNECT3;
1314 l4kwqe3->flags =
1315 L4_LAYER_CODE << L4_KWQ_CONNECT_REQ3_LAYER_CODE_SHIFT;
1316 l4kwqe3->ka_timeout = csk->ka_timeout;
1317 l4kwqe3->ka_interval = csk->ka_interval;
1318 l4kwqe3->ka_max_probe_count = csk->ka_max_probe_count;
1319 l4kwqe3->tos = csk->tos;
1320 l4kwqe3->ttl = csk->ttl;
1321 l4kwqe3->snd_seq_scale = csk->snd_seq_scale;
1322 l4kwqe3->pmtu = csk->mtu;
1323 l4kwqe3->rcv_buf = csk->rcv_buf;
1324 l4kwqe3->snd_buf = csk->snd_buf;
1325 l4kwqe3->seed = csk->seed;
1326
1327 wqes[0] = (struct kwqe *) l4kwqe1;
1328 if (test_bit(SK_F_IPV6, &csk->flags)) {
1329 wqes[1] = (struct kwqe *) l4kwqe2;
1330 wqes[2] = (struct kwqe *) l4kwqe3;
1331 num_wqes = 3;
1332
1333 l4kwqe1->conn_flags = L4_KWQ_CONNECT_REQ1_IP_V6;
1334 l4kwqe2->op_code = L4_KWQE_OPCODE_VALUE_CONNECT2;
1335 l4kwqe2->flags =
1336 L4_KWQ_CONNECT_REQ2_LINKED_WITH_NEXT |
1337 L4_LAYER_CODE << L4_KWQ_CONNECT_REQ2_LAYER_CODE_SHIFT;
1338 l4kwqe2->src_ip_v6_2 = be32_to_cpu(csk->src_ip[1]);
1339 l4kwqe2->src_ip_v6_3 = be32_to_cpu(csk->src_ip[2]);
1340 l4kwqe2->src_ip_v6_4 = be32_to_cpu(csk->src_ip[3]);
1341 l4kwqe2->dst_ip_v6_2 = be32_to_cpu(csk->dst_ip[1]);
1342 l4kwqe2->dst_ip_v6_3 = be32_to_cpu(csk->dst_ip[2]);
1343 l4kwqe2->dst_ip_v6_4 = be32_to_cpu(csk->dst_ip[3]);
1344 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct ipv6hdr) -
1345 sizeof(struct tcphdr);
1346 } else {
1347 wqes[1] = (struct kwqe *) l4kwqe3;
1348 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct iphdr) -
1349 sizeof(struct tcphdr);
1350 }
1351
1352 l4kwqe1->op_code = L4_KWQE_OPCODE_VALUE_CONNECT1;
1353 l4kwqe1->flags =
1354 (L4_LAYER_CODE << L4_KWQ_CONNECT_REQ1_LAYER_CODE_SHIFT) |
1355 L4_KWQ_CONNECT_REQ3_LINKED_WITH_NEXT;
1356 l4kwqe1->cid = csk->cid;
1357 l4kwqe1->pg_cid = csk->pg_cid;
1358 l4kwqe1->src_ip = be32_to_cpu(csk->src_ip[0]);
1359 l4kwqe1->dst_ip = be32_to_cpu(csk->dst_ip[0]);
1360 l4kwqe1->src_port = be16_to_cpu(csk->src_port);
1361 l4kwqe1->dst_port = be16_to_cpu(csk->dst_port);
1362 if (csk->tcp_flags & SK_TCP_NO_DELAY_ACK)
1363 tcp_flags |= L4_KWQ_CONNECT_REQ1_NO_DELAY_ACK;
1364 if (csk->tcp_flags & SK_TCP_KEEP_ALIVE)
1365 tcp_flags |= L4_KWQ_CONNECT_REQ1_KEEP_ALIVE;
1366 if (csk->tcp_flags & SK_TCP_NAGLE)
1367 tcp_flags |= L4_KWQ_CONNECT_REQ1_NAGLE_ENABLE;
1368 if (csk->tcp_flags & SK_TCP_TIMESTAMP)
1369 tcp_flags |= L4_KWQ_CONNECT_REQ1_TIME_STAMP;
1370 if (csk->tcp_flags & SK_TCP_SACK)
1371 tcp_flags |= L4_KWQ_CONNECT_REQ1_SACK;
1372 if (csk->tcp_flags & SK_TCP_SEG_SCALING)
1373 tcp_flags |= L4_KWQ_CONNECT_REQ1_SEG_SCALING;
1374
1375 l4kwqe1->tcp_flags = tcp_flags;
1376
1377 return dev->submit_kwqes(dev, wqes, num_wqes);
1378}
1379
1380static int cnic_cm_close_req(struct cnic_sock *csk)
1381{
1382 struct cnic_dev *dev = csk->dev;
1383 struct l4_kwq_close_req *l4kwqe;
1384 struct kwqe *wqes[1];
1385
1386 l4kwqe = (struct l4_kwq_close_req *) &csk->kwqe2;
1387 memset(l4kwqe, 0, sizeof(*l4kwqe));
1388 wqes[0] = (struct kwqe *) l4kwqe;
1389
1390 l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_CLOSE;
1391 l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_CLOSE_REQ_LAYER_CODE_SHIFT;
1392 l4kwqe->cid = csk->cid;
1393
1394 return dev->submit_kwqes(dev, wqes, 1);
1395}
1396
1397static int cnic_cm_abort_req(struct cnic_sock *csk)
1398{
1399 struct cnic_dev *dev = csk->dev;
1400 struct l4_kwq_reset_req *l4kwqe;
1401 struct kwqe *wqes[1];
1402
1403 l4kwqe = (struct l4_kwq_reset_req *) &csk->kwqe2;
1404 memset(l4kwqe, 0, sizeof(*l4kwqe));
1405 wqes[0] = (struct kwqe *) l4kwqe;
1406
1407 l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_RESET;
1408 l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_RESET_REQ_LAYER_CODE_SHIFT;
1409 l4kwqe->cid = csk->cid;
1410
1411 return dev->submit_kwqes(dev, wqes, 1);
1412}
1413
1414static int cnic_cm_create(struct cnic_dev *dev, int ulp_type, u32 cid,
1415 u32 l5_cid, struct cnic_sock **csk, void *context)
1416{
1417 struct cnic_local *cp = dev->cnic_priv;
1418 struct cnic_sock *csk1;
1419
1420 if (l5_cid >= MAX_CM_SK_TBL_SZ)
1421 return -EINVAL;
1422
1423 csk1 = &cp->csk_tbl[l5_cid];
1424 if (atomic_read(&csk1->ref_count))
1425 return -EAGAIN;
1426
1427 if (test_and_set_bit(SK_F_INUSE, &csk1->flags))
1428 return -EBUSY;
1429
1430 csk1->dev = dev;
1431 csk1->cid = cid;
1432 csk1->l5_cid = l5_cid;
1433 csk1->ulp_type = ulp_type;
1434 csk1->context = context;
1435
1436 csk1->ka_timeout = DEF_KA_TIMEOUT;
1437 csk1->ka_interval = DEF_KA_INTERVAL;
1438 csk1->ka_max_probe_count = DEF_KA_MAX_PROBE_COUNT;
1439 csk1->tos = DEF_TOS;
1440 csk1->ttl = DEF_TTL;
1441 csk1->snd_seq_scale = DEF_SND_SEQ_SCALE;
1442 csk1->rcv_buf = DEF_RCV_BUF;
1443 csk1->snd_buf = DEF_SND_BUF;
1444 csk1->seed = DEF_SEED;
1445
1446 *csk = csk1;
1447 return 0;
1448}
1449
1450static void cnic_cm_cleanup(struct cnic_sock *csk)
1451{
1452 if (csk->src_port) {
1453 struct cnic_dev *dev = csk->dev;
1454 struct cnic_local *cp = dev->cnic_priv;
1455
1456 cnic_free_id(&cp->csk_port_tbl, csk->src_port);
1457 csk->src_port = 0;
1458 }
1459}
1460
1461static void cnic_close_conn(struct cnic_sock *csk)
1462{
1463 if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags)) {
1464 cnic_cm_upload_pg(csk);
1465 clear_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1466 }
1467 cnic_cm_cleanup(csk);
1468}
1469
1470static int cnic_cm_destroy(struct cnic_sock *csk)
1471{
1472 if (!cnic_in_use(csk))
1473 return -EINVAL;
1474
1475 csk_hold(csk);
1476 clear_bit(SK_F_INUSE, &csk->flags);
1477 smp_mb__after_clear_bit();
1478 while (atomic_read(&csk->ref_count) != 1)
1479 msleep(1);
1480 cnic_cm_cleanup(csk);
1481
1482 csk->flags = 0;
1483 csk_put(csk);
1484 return 0;
1485}
1486
1487static inline u16 cnic_get_vlan(struct net_device *dev,
1488 struct net_device **vlan_dev)
1489{
1490 if (dev->priv_flags & IFF_802_1Q_VLAN) {
1491 *vlan_dev = vlan_dev_real_dev(dev);
1492 return vlan_dev_vlan_id(dev);
1493 }
1494 *vlan_dev = dev;
1495 return 0;
1496}
1497
1498static int cnic_get_v4_route(struct sockaddr_in *dst_addr,
1499 struct dst_entry **dst)
1500{
faea56c9 1501#if defined(CONFIG_INET)
a4636960
MC		 1502 struct flowi fl;
1503 int err;
1504 struct rtable *rt;
1505
1506 memset(&fl, 0, sizeof(fl));
1507 fl.nl_u.ip4_u.daddr = dst_addr->sin_addr.s_addr;
1508
1509 err = ip_route_output_key(&init_net, &rt, &fl);
1510 if (!err)
1511 *dst = &rt->u.dst;
1512 return err;
faea56c9
RD		 1513#else
1514 return -ENETUNREACH;
1515#endif
a4636960
MC		 1516}
1517
1518static int cnic_get_v6_route(struct sockaddr_in6 *dst_addr,
1519 struct dst_entry **dst)
1520{
faea56c9 1521#if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
a4636960
MC		 1522 struct flowi fl;
1523
1524 memset(&fl, 0, sizeof(fl));
1525 ipv6_addr_copy(&fl.fl6_dst, &dst_addr->sin6_addr);
1526 if (ipv6_addr_type(&fl.fl6_dst) & IPV6_ADDR_LINKLOCAL)
1527 fl.oif = dst_addr->sin6_scope_id;
1528
1529 *dst = ip6_route_output(&init_net, NULL, &fl);
1530 if (*dst)
1531 return 0;
1532#endif
1533
1534 return -ENETUNREACH;
1535}
1536
1537static struct cnic_dev *cnic_cm_select_dev(struct sockaddr_in *dst_addr,
1538 int ulp_type)
1539{
1540 struct cnic_dev *dev = NULL;
1541 struct dst_entry *dst;
1542 struct net_device *netdev = NULL;
1543 int err = -ENETUNREACH;
1544
1545 if (dst_addr->sin_family == AF_INET)
1546 err = cnic_get_v4_route(dst_addr, &dst);
1547 else if (dst_addr->sin_family == AF_INET6) {
1548 struct sockaddr_in6 *dst_addr6 =
1549 (struct sockaddr_in6 *) dst_addr;
1550
1551 err = cnic_get_v6_route(dst_addr6, &dst);
1552 } else
1553 return NULL;
1554
1555 if (err)
1556 return NULL;
1557
1558 if (!dst->dev)
1559 goto done;
1560
1561 cnic_get_vlan(dst->dev, &netdev);
1562
1563 dev = cnic_from_netdev(netdev);
1564
1565done:
1566 dst_release(dst);
1567 if (dev)
1568 cnic_put(dev);
1569 return dev;
1570}
1571
1572static int cnic_resolve_addr(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1573{
1574 struct cnic_dev *dev = csk->dev;
1575 struct cnic_local *cp = dev->cnic_priv;
1576
1577 return cnic_send_nlmsg(cp, ISCSI_KEVENT_PATH_REQ, csk);
1578}
1579
1580static int cnic_get_route(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1581{
1582 struct cnic_dev *dev = csk->dev;
1583 struct cnic_local *cp = dev->cnic_priv;
1584 int is_v6, err, rc = -ENETUNREACH;
1585 struct dst_entry *dst;
1586 struct net_device *realdev;
1587 u32 local_port;
1588
1589 if (saddr->local.v6.sin6_family == AF_INET6 &&
1590 saddr->remote.v6.sin6_family == AF_INET6)
1591 is_v6 = 1;
1592 else if (saddr->local.v4.sin_family == AF_INET &&
1593 saddr->remote.v4.sin_family == AF_INET)
1594 is_v6 = 0;
1595 else
1596 return -EINVAL;
1597
1598 clear_bit(SK_F_IPV6, &csk->flags);
1599
1600 if (is_v6) {
faea56c9 1601#if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
a4636960
MC		 1602 set_bit(SK_F_IPV6, &csk->flags);
1603 err = cnic_get_v6_route(&saddr->remote.v6, &dst);
1604 if (err)
1605 return err;
1606
1607 if (!dst || dst->error || !dst->dev)
1608 goto err_out;
1609
1610 memcpy(&csk->dst_ip[0], &saddr->remote.v6.sin6_addr,
1611 sizeof(struct in6_addr));
1612 csk->dst_port = saddr->remote.v6.sin6_port;
1613 local_port = saddr->local.v6.sin6_port;
1614#else
1615 return rc;
1616#endif
1617
1618 } else {
1619 err = cnic_get_v4_route(&saddr->remote.v4, &dst);
1620 if (err)
1621 return err;
1622
1623 if (!dst || dst->error || !dst->dev)
1624 goto err_out;
1625
1626 csk->dst_ip[0] = saddr->remote.v4.sin_addr.s_addr;
1627 csk->dst_port = saddr->remote.v4.sin_port;
1628 local_port = saddr->local.v4.sin_port;
1629 }
1630
1631 csk->vlan_id = cnic_get_vlan(dst->dev, &realdev);
1632 if (realdev != dev->netdev)
1633 goto err_out;
1634
1635 if (local_port >= CNIC_LOCAL_PORT_MIN &&
1636 local_port < CNIC_LOCAL_PORT_MAX) {
1637 if (cnic_alloc_id(&cp->csk_port_tbl, local_port))
1638 local_port = 0;
1639 } else
1640 local_port = 0;
1641
1642 if (!local_port) {
1643 local_port = cnic_alloc_new_id(&cp->csk_port_tbl);
1644 if (local_port == -1) {
1645 rc = -ENOMEM;
1646 goto err_out;
1647 }
1648 }
1649 csk->src_port = local_port;
1650
1651 csk->mtu = dst_mtu(dst);
1652 rc = 0;
1653
1654err_out:
1655 dst_release(dst);
1656 return rc;
1657}
1658
1659static void cnic_init_csk_state(struct cnic_sock *csk)
1660{
1661 csk->state = 0;
1662 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1663 clear_bit(SK_F_CLOSING, &csk->flags);
1664}
1665
1666static int cnic_cm_connect(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1667{
1668 int err = 0;
1669
1670 if (!cnic_in_use(csk))
1671 return -EINVAL;
1672
1673 if (test_and_set_bit(SK_F_CONNECT_START, &csk->flags))
1674 return -EINVAL;
1675
1676 cnic_init_csk_state(csk);
1677
1678 err = cnic_get_route(csk, saddr);
1679 if (err)
1680 goto err_out;
1681
1682 err = cnic_resolve_addr(csk, saddr);
1683 if (!err)
1684 return 0;
1685
1686err_out:
1687 clear_bit(SK_F_CONNECT_START, &csk->flags);
1688 return err;
1689}
1690
1691static int cnic_cm_abort(struct cnic_sock *csk)
1692{
1693 struct cnic_local *cp = csk->dev->cnic_priv;
1694 u32 opcode;
1695
1696 if (!cnic_in_use(csk))
1697 return -EINVAL;
1698
1699 if (cnic_abort_prep(csk))
1700 return cnic_cm_abort_req(csk);
1701
1702 /* Getting here means that we haven't started connect, or
1703 * connect was not successful.
1704 */
1705
1706 csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
1707 if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1708 opcode = csk->state;
1709 else
1710 opcode = L5CM_RAMROD_CMD_ID_TERMINATE_OFFLOAD;
1711 cp->close_conn(csk, opcode);
1712
1713 return 0;
1714}
1715
1716static int cnic_cm_close(struct cnic_sock *csk)
1717{
1718 if (!cnic_in_use(csk))
1719 return -EINVAL;
1720
1721 if (cnic_close_prep(csk)) {
1722 csk->state = L4_KCQE_OPCODE_VALUE_CLOSE_COMP;
1723 return cnic_cm_close_req(csk);
1724 }
1725 return 0;
1726}
1727
1728static void cnic_cm_upcall(struct cnic_local *cp, struct cnic_sock *csk,
1729 u8 opcode)
1730{
1731 struct cnic_ulp_ops *ulp_ops;
1732 int ulp_type = csk->ulp_type;
1733
1734 rcu_read_lock();
1735 ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
1736 if (ulp_ops) {
1737 if (opcode == L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE)
1738 ulp_ops->cm_connect_complete(csk);
1739 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)
1740 ulp_ops->cm_close_complete(csk);
1741 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED)
1742 ulp_ops->cm_remote_abort(csk);
1743 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_COMP)
1744 ulp_ops->cm_abort_complete(csk);
1745 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED)
1746 ulp_ops->cm_remote_close(csk);
1747 }
1748 rcu_read_unlock();
1749}
1750
1751static int cnic_cm_set_pg(struct cnic_sock *csk)
1752{
1753 if (cnic_offld_prep(csk)) {
1754 if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1755 cnic_cm_update_pg(csk);
1756 else
1757 cnic_cm_offload_pg(csk);
1758 }
1759 return 0;
1760}
1761
1762static void cnic_cm_process_offld_pg(struct cnic_dev *dev, struct l4_kcq *kcqe)
1763{
1764 struct cnic_local *cp = dev->cnic_priv;
1765 u32 l5_cid = kcqe->pg_host_opaque;
1766 u8 opcode = kcqe->op_code;
1767 struct cnic_sock *csk = &cp->csk_tbl[l5_cid];
1768
1769 csk_hold(csk);
1770 if (!cnic_in_use(csk))
1771 goto done;
1772
1773 if (opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1774 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1775 goto done;
1776 }
1777 csk->pg_cid = kcqe->pg_cid;
1778 set_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1779 cnic_cm_conn_req(csk);
1780
1781done:
1782 csk_put(csk);
1783}
1784
1785static void cnic_cm_process_kcqe(struct cnic_dev *dev, struct kcqe *kcqe)
1786{
1787 struct cnic_local *cp = dev->cnic_priv;
1788 struct l4_kcq *l4kcqe = (struct l4_kcq *) kcqe;
1789 u8 opcode = l4kcqe->op_code;
1790 u32 l5_cid;
1791 struct cnic_sock *csk;
1792
1793 if (opcode == L4_KCQE_OPCODE_VALUE_OFFLOAD_PG ||
1794 opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1795 cnic_cm_process_offld_pg(dev, l4kcqe);
1796 return;
1797 }
1798
1799 l5_cid = l4kcqe->conn_id;
1800 if (opcode & 0x80)
1801 l5_cid = l4kcqe->cid;
1802 if (l5_cid >= MAX_CM_SK_TBL_SZ)
1803 return;
1804
1805 csk = &cp->csk_tbl[l5_cid];
1806 csk_hold(csk);
1807
1808 if (!cnic_in_use(csk)) {
1809 csk_put(csk);
1810 return;
1811 }
1812
1813 switch (opcode) {
1814 case L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE:
1815 if (l4kcqe->status == 0)
1816 set_bit(SK_F_OFFLD_COMPLETE, &csk->flags);
1817
1818 smp_mb__before_clear_bit();
1819 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1820 cnic_cm_upcall(cp, csk, opcode);
1821 break;
1822
1823 case L4_KCQE_OPCODE_VALUE_RESET_RECEIVED:
1824 if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags))
1825 csk->state = opcode;
1826 /* fall through */
1827 case L4_KCQE_OPCODE_VALUE_CLOSE_COMP:
1828 case L4_KCQE_OPCODE_VALUE_RESET_COMP:
1829 cp->close_conn(csk, opcode);
1830 break;
1831
1832 case L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED:
1833 cnic_cm_upcall(cp, csk, opcode);
1834 break;
1835 }
1836 csk_put(csk);
1837}
1838
1839static void cnic_cm_indicate_kcqe(void *data, struct kcqe *kcqe[], u32 num)
1840{
1841 struct cnic_dev *dev = data;
1842 int i;
1843
1844 for (i = 0; i < num; i++)
1845 cnic_cm_process_kcqe(dev, kcqe[i]);
1846}
1847
1848static struct cnic_ulp_ops cm_ulp_ops = {
1849 .indicate_kcqes = cnic_cm_indicate_kcqe,
1850};
1851
1852static void cnic_cm_free_mem(struct cnic_dev *dev)
1853{
1854 struct cnic_local *cp = dev->cnic_priv;
1855
1856 kfree(cp->csk_tbl);
1857 cp->csk_tbl = NULL;
1858 cnic_free_id_tbl(&cp->csk_port_tbl);
1859}
1860
1861static int cnic_cm_alloc_mem(struct cnic_dev *dev)
1862{
1863 struct cnic_local *cp = dev->cnic_priv;
1864
1865 cp->csk_tbl = kzalloc(sizeof(struct cnic_sock) * MAX_CM_SK_TBL_SZ,
1866 GFP_KERNEL);
1867 if (!cp->csk_tbl)
1868 return -ENOMEM;
1869
1870 if (cnic_init_id_tbl(&cp->csk_port_tbl, CNIC_LOCAL_PORT_RANGE,
1871 CNIC_LOCAL_PORT_MIN)) {
1872 cnic_cm_free_mem(dev);
1873 return -ENOMEM;
1874 }
1875 return 0;
1876}
1877
1878static int cnic_ready_to_close(struct cnic_sock *csk, u32 opcode)
1879{
1880 if ((opcode == csk->state) ||
1881 (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED &&
1882 csk->state == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)) {
1883 if (!test_and_set_bit(SK_F_CLOSING, &csk->flags))
1884 return 1;
1885 }
1886 return 0;
1887}
1888
1889static void cnic_close_bnx2_conn(struct cnic_sock *csk, u32 opcode)
1890{
1891 struct cnic_dev *dev = csk->dev;
1892 struct cnic_local *cp = dev->cnic_priv;
1893
1894 clear_bit(SK_F_CONNECT_START, &csk->flags);
1895 if (cnic_ready_to_close(csk, opcode)) {
1896 cnic_close_conn(csk);
1897 cnic_cm_upcall(cp, csk, opcode);
1898 }
1899}
1900
1901static void cnic_cm_stop_bnx2_hw(struct cnic_dev *dev)
1902{
1903}
1904
1905static int cnic_cm_init_bnx2_hw(struct cnic_dev *dev)
1906{
1907 u32 seed;
1908
1909 get_random_bytes(&seed, 4);
1910 cnic_ctx_wr(dev, 45, 0, seed);
1911 return 0;
1912}
1913
1914static int cnic_cm_open(struct cnic_dev *dev)
1915{
1916 struct cnic_local *cp = dev->cnic_priv;
1917 int err;
1918
1919 err = cnic_cm_alloc_mem(dev);
1920 if (err)
1921 return err;
1922
1923 err = cp->start_cm(dev);
1924
1925 if (err)
1926 goto err_out;
1927
1928 dev->cm_create = cnic_cm_create;
1929 dev->cm_destroy = cnic_cm_destroy;
1930 dev->cm_connect = cnic_cm_connect;
1931 dev->cm_abort = cnic_cm_abort;
1932 dev->cm_close = cnic_cm_close;
1933 dev->cm_select_dev = cnic_cm_select_dev;
1934
1935 cp->ulp_handle[CNIC_ULP_L4] = dev;
1936 rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], &cm_ulp_ops);
1937 return 0;
1938
1939err_out:
1940 cnic_cm_free_mem(dev);
1941 return err;
1942}
1943
1944static int cnic_cm_shutdown(struct cnic_dev *dev)
1945{
1946 struct cnic_local *cp = dev->cnic_priv;
1947 int i;
1948
1949 cp->stop_cm(dev);
1950
1951 if (!cp->csk_tbl)
1952 return 0;
1953
1954 for (i = 0; i < MAX_CM_SK_TBL_SZ; i++) {
1955 struct cnic_sock *csk = &cp->csk_tbl[i];
1956
1957 clear_bit(SK_F_INUSE, &csk->flags);
1958 cnic_cm_cleanup(csk);
1959 }
1960 cnic_cm_free_mem(dev);
1961
1962 return 0;
1963}
1964
1965static void cnic_init_context(struct cnic_dev *dev, u32 cid)
1966{
1967 struct cnic_local *cp = dev->cnic_priv;
1968 u32 cid_addr;
1969 int i;
1970
1971 if (CHIP_NUM(cp) == CHIP_NUM_5709)
1972 return;
1973
1974 cid_addr = GET_CID_ADDR(cid);
1975
1976 for (i = 0; i < CTX_SIZE; i += 4)
1977 cnic_ctx_wr(dev, cid_addr, i, 0);
1978}
1979
1980static int cnic_setup_5709_context(struct cnic_dev *dev, int valid)
1981{
1982 struct cnic_local *cp = dev->cnic_priv;
1983 int ret = 0, i;
1984 u32 valid_bit = valid ? BNX2_CTX_HOST_PAGE_TBL_DATA0_VALID : 0;
1985
1986 if (CHIP_NUM(cp) != CHIP_NUM_5709)
1987 return 0;
1988
1989 for (i = 0; i < cp->ctx_blks; i++) {
1990 int j;
1991 u32 idx = cp->ctx_arr[i].cid / cp->cids_per_blk;
1992 u32 val;
1993
1994 memset(cp->ctx_arr[i].ctx, 0, BCM_PAGE_SIZE);
1995
1996 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA0,
1997 (cp->ctx_arr[i].mapping & 0xffffffff) | valid_bit);
1998 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA1,
1999 (u64) cp->ctx_arr[i].mapping >> 32);
2000 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL, idx |
2001 BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ);
2002 for (j = 0; j < 10; j++) {
2003
2004 val = CNIC_RD(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL);
2005 if (!(val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ))
2006 break;
2007 udelay(5);
2008 }
2009 if (val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ) {
2010 ret = -EBUSY;
2011 break;
2012 }
2013 }
2014 return ret;
2015}
2016
2017static void cnic_free_irq(struct cnic_dev *dev)
2018{
2019 struct cnic_local *cp = dev->cnic_priv;
2020 struct cnic_eth_dev *ethdev = cp->ethdev;
2021
2022 if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2023 cp->disable_int_sync(dev);
2024 tasklet_disable(&cp->cnic_irq_task);
2025 free_irq(ethdev->irq_arr[0].vector, dev);
2026 }
2027}
2028
2029static int cnic_init_bnx2_irq(struct cnic_dev *dev)
2030{
2031 struct cnic_local *cp = dev->cnic_priv;
2032 struct cnic_eth_dev *ethdev = cp->ethdev;
2033
2034 if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2035 int err, i = 0;
2036 int sblk_num = cp->status_blk_num;
2037 u32 base = ((sblk_num - 1) * BNX2_HC_SB_CONFIG_SIZE) +
2038 BNX2_HC_SB_CONFIG_1;
2039
2040 CNIC_WR(dev, base, BNX2_HC_SB_CONFIG_1_ONE_SHOT);
2041
2042 CNIC_WR(dev, base + BNX2_HC_COMP_PROD_TRIP_OFF, (2 << 16) | 8);
2043 CNIC_WR(dev, base + BNX2_HC_COM_TICKS_OFF, (64 << 16) | 220);
2044 CNIC_WR(dev, base + BNX2_HC_CMD_TICKS_OFF, (64 << 16) | 220);
2045
2046 cp->bnx2_status_blk = cp->status_blk;
2047 cp->last_status_idx = cp->bnx2_status_blk->status_idx;
2048 tasklet_init(&cp->cnic_irq_task, &cnic_service_bnx2_msix,
2049 (unsigned long) dev);
2050 err = request_irq(ethdev->irq_arr[0].vector, cnic_irq, 0,
2051 "cnic", dev);
2052 if (err) {
2053 tasklet_disable(&cp->cnic_irq_task);
2054 return err;
2055 }
2056 while (cp->bnx2_status_blk->status_completion_producer_index &&
2057 i < 10) {
2058 CNIC_WR(dev, BNX2_HC_COALESCE_NOW,
2059 1 << (11 + sblk_num));
2060 udelay(10);
2061 i++;
2062 barrier();
2063 }
2064 if (cp->bnx2_status_blk->status_completion_producer_index) {
2065 cnic_free_irq(dev);
2066 goto failed;
2067 }
2068
2069 } else {
2070 struct status_block *sblk = cp->status_blk;
2071 u32 hc_cmd = CNIC_RD(dev, BNX2_HC_COMMAND);
2072 int i = 0;
2073
2074 while (sblk->status_completion_producer_index && i < 10) {
2075 CNIC_WR(dev, BNX2_HC_COMMAND,
2076 hc_cmd | BNX2_HC_COMMAND_COAL_NOW_WO_INT);
2077 udelay(10);
2078 i++;
2079 barrier();
2080 }
2081 if (sblk->status_completion_producer_index)
2082 goto failed;
2083
2084 }
2085 return 0;
2086
2087failed:
2088 printk(KERN_ERR PFX "%s: " "KCQ index not resetting to 0.\n",
2089 dev->netdev->name);
2090 return -EBUSY;
2091}
2092
2093static void cnic_enable_bnx2_int(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 return;
2100
2101 CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2102 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
2103}
2104
2105static void cnic_disable_bnx2_int_sync(struct cnic_dev *dev)
2106{
2107 struct cnic_local *cp = dev->cnic_priv;
2108 struct cnic_eth_dev *ethdev = cp->ethdev;
2109
2110 if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2111 return;
2112
2113 CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2114 BNX2_PCICFG_INT_ACK_CMD_MASK_INT);
2115 CNIC_RD(dev, BNX2_PCICFG_INT_ACK_CMD);
2116 synchronize_irq(ethdev->irq_arr[0].vector);
2117}
2118
2119static void cnic_init_bnx2_tx_ring(struct cnic_dev *dev)
2120{
2121 struct cnic_local *cp = dev->cnic_priv;
2122 struct cnic_eth_dev *ethdev = cp->ethdev;
2123 u32 cid_addr, tx_cid, sb_id;
2124 u32 val, offset0, offset1, offset2, offset3;
2125 int i;
2126 struct tx_bd *txbd;
2127 dma_addr_t buf_map;
2128 struct status_block *s_blk = cp->status_blk;
2129
2130 sb_id = cp->status_blk_num;
2131 tx_cid = 20;
2132 cnic_init_context(dev, tx_cid);
2133 cnic_init_context(dev, tx_cid + 1);
2134 cp->tx_cons_ptr = &s_blk->status_tx_quick_consumer_index2;
2135 if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2136 struct status_block_msix *sblk = cp->status_blk;
2137
2138 tx_cid = TX_TSS_CID + sb_id - 1;
2139 cnic_init_context(dev, tx_cid);
2140 CNIC_WR(dev, BNX2_TSCH_TSS_CFG, (sb_id << 24) |
2141 (TX_TSS_CID << 7));
2142 cp->tx_cons_ptr = &sblk->status_tx_quick_consumer_index;
2143 }
2144 cp->tx_cons = *cp->tx_cons_ptr;
2145
2146 cid_addr = GET_CID_ADDR(tx_cid);
2147 if (CHIP_NUM(cp) == CHIP_NUM_5709) {
2148 u32 cid_addr2 = GET_CID_ADDR(tx_cid + 4) + 0x40;
2149
2150 for (i = 0; i < PHY_CTX_SIZE; i += 4)
2151 cnic_ctx_wr(dev, cid_addr2, i, 0);
2152
2153 offset0 = BNX2_L2CTX_TYPE_XI;
2154 offset1 = BNX2_L2CTX_CMD_TYPE_XI;
2155 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI_XI;
2156 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO_XI;
2157 } else {
2158 offset0 = BNX2_L2CTX_TYPE;
2159 offset1 = BNX2_L2CTX_CMD_TYPE;
2160 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI;
2161 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO;
2162 }
2163 val = BNX2_L2CTX_TYPE_TYPE_L2 | BNX2_L2CTX_TYPE_SIZE_L2;
2164 cnic_ctx_wr(dev, cid_addr, offset0, val);
2165
2166 val = BNX2_L2CTX_CMD_TYPE_TYPE_L2 | (8 << 16);
2167 cnic_ctx_wr(dev, cid_addr, offset1, val);
2168
2169 txbd = (struct tx_bd *) cp->l2_ring;
2170
2171 buf_map = cp->l2_buf_map;
2172 for (i = 0; i < MAX_TX_DESC_CNT; i++, txbd++) {
2173 txbd->tx_bd_haddr_hi = (u64) buf_map >> 32;
2174 txbd->tx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2175 }
2176 val = (u64) cp->l2_ring_map >> 32;
2177 cnic_ctx_wr(dev, cid_addr, offset2, val);
2178 txbd->tx_bd_haddr_hi = val;
2179
2180 val = (u64) cp->l2_ring_map & 0xffffffff;
2181 cnic_ctx_wr(dev, cid_addr, offset3, val);
2182 txbd->tx_bd_haddr_lo = val;
2183}
2184
2185static void cnic_init_bnx2_rx_ring(struct cnic_dev *dev)
2186{
2187 struct cnic_local *cp = dev->cnic_priv;
2188 struct cnic_eth_dev *ethdev = cp->ethdev;
2189 u32 cid_addr, sb_id, val, coal_reg, coal_val;
2190 int i;
2191 struct rx_bd *rxbd;
2192 struct status_block *s_blk = cp->status_blk;
2193
2194 sb_id = cp->status_blk_num;
2195 cnic_init_context(dev, 2);
2196 cp->rx_cons_ptr = &s_blk->status_rx_quick_consumer_index2;
2197 coal_reg = BNX2_HC_COMMAND;
2198 coal_val = CNIC_RD(dev, coal_reg);
2199 if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2200 struct status_block_msix *sblk = cp->status_blk;
2201
2202 cp->rx_cons_ptr = &sblk->status_rx_quick_consumer_index;
2203 coal_reg = BNX2_HC_COALESCE_NOW;
2204 coal_val = 1 << (11 + sb_id);
2205 }
2206 i = 0;
2207 while (!(*cp->rx_cons_ptr != 0) && i < 10) {
2208 CNIC_WR(dev, coal_reg, coal_val);
2209 udelay(10);
2210 i++;
2211 barrier();
2212 }
2213 cp->rx_cons = *cp->rx_cons_ptr;
2214
2215 cid_addr = GET_CID_ADDR(2);
2216 val = BNX2_L2CTX_CTX_TYPE_CTX_BD_CHN_TYPE_VALUE |
2217 BNX2_L2CTX_CTX_TYPE_SIZE_L2 | (0x02 << 8);
2218 cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_CTX_TYPE, val);
2219
2220 if (sb_id == 0)
2221 val = 2 << BNX2_L2CTX_STATUSB_NUM_SHIFT;
2222 else
2223 val = BNX2_L2CTX_STATUSB_NUM(sb_id);
2224 cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_HOST_BDIDX, val);
2225
2226 rxbd = (struct rx_bd *) (cp->l2_ring + BCM_PAGE_SIZE);
2227 for (i = 0; i < MAX_RX_DESC_CNT; i++, rxbd++) {
2228 dma_addr_t buf_map;
2229 int n = (i % cp->l2_rx_ring_size) + 1;
2230
2231 buf_map = cp->l2_buf_map + (n * cp->l2_single_buf_size);
2232 rxbd->rx_bd_len = cp->l2_single_buf_size;
2233 rxbd->rx_bd_flags = RX_BD_FLAGS_START | RX_BD_FLAGS_END;
2234 rxbd->rx_bd_haddr_hi = (u64) buf_map >> 32;
2235 rxbd->rx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2236 }
2237 val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) >> 32;
2238 cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_HI, val);
2239 rxbd->rx_bd_haddr_hi = val;
2240
2241 val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) & 0xffffffff;
2242 cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_LO, val);
2243 rxbd->rx_bd_haddr_lo = val;
2244
2245 val = cnic_reg_rd_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD);
2246 cnic_reg_wr_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD, val | (1 << 2));
2247}
2248
2249static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *dev)
2250{
2251 struct kwqe *wqes[1], l2kwqe;
2252
2253 memset(&l2kwqe, 0, sizeof(l2kwqe));
2254 wqes[0] = &l2kwqe;
2255 l2kwqe.kwqe_op_flag = (L2_LAYER_CODE << KWQE_FLAGS_LAYER_SHIFT) |
2256 (L2_KWQE_OPCODE_VALUE_FLUSH <<
2257 KWQE_OPCODE_SHIFT) | 2;
2258 dev->submit_kwqes(dev, wqes, 1);
2259}
2260
2261static void cnic_set_bnx2_mac(struct cnic_dev *dev)
2262{
2263 struct cnic_local *cp = dev->cnic_priv;
2264 u32 val;
2265
2266 val = cp->func << 2;
2267
2268 cp->shmem_base = cnic_reg_rd_ind(dev, BNX2_SHM_HDR_ADDR_0 + val);
2269
2270 val = cnic_reg_rd_ind(dev, cp->shmem_base +
2271 BNX2_PORT_HW_CFG_ISCSI_MAC_UPPER);
2272 dev->mac_addr[0] = (u8) (val >> 8);
2273 dev->mac_addr[1] = (u8) val;
2274
2275 CNIC_WR(dev, BNX2_EMAC_MAC_MATCH4, val);
2276
2277 val = cnic_reg_rd_ind(dev, cp->shmem_base +
2278 BNX2_PORT_HW_CFG_ISCSI_MAC_LOWER);
2279 dev->mac_addr[2] = (u8) (val >> 24);
2280 dev->mac_addr[3] = (u8) (val >> 16);
2281 dev->mac_addr[4] = (u8) (val >> 8);
2282 dev->mac_addr[5] = (u8) val;
2283
2284 CNIC_WR(dev, BNX2_EMAC_MAC_MATCH5, val);
2285
2286 val = 4 | BNX2_RPM_SORT_USER2_BC_EN;
2287 if (CHIP_NUM(cp) != CHIP_NUM_5709)
2288 val |= BNX2_RPM_SORT_USER2_PROM_VLAN;
2289
2290 CNIC_WR(dev, BNX2_RPM_SORT_USER2, 0x0);
2291 CNIC_WR(dev, BNX2_RPM_SORT_USER2, val);
2292 CNIC_WR(dev, BNX2_RPM_SORT_USER2, val | BNX2_RPM_SORT_USER2_ENA);
2293}
2294
2295static int cnic_start_bnx2_hw(struct cnic_dev *dev)
2296{
2297 struct cnic_local *cp = dev->cnic_priv;
2298 struct cnic_eth_dev *ethdev = cp->ethdev;
2299 struct status_block *sblk = cp->status_blk;
2300 u32 val;
2301 int err;
2302
2303 cnic_set_bnx2_mac(dev);
2304
2305 val = CNIC_RD(dev, BNX2_MQ_CONFIG);
2306 val &= ~BNX2_MQ_CONFIG_KNL_BYP_BLK_SIZE;
2307 if (BCM_PAGE_BITS > 12)
2308 val |= (12 - 8) << 4;
2309 else
2310 val |= (BCM_PAGE_BITS - 8) << 4;
2311
2312 CNIC_WR(dev, BNX2_MQ_CONFIG, val);
2313
2314 CNIC_WR(dev, BNX2_HC_COMP_PROD_TRIP, (2 << 16) | 8);
2315 CNIC_WR(dev, BNX2_HC_COM_TICKS, (64 << 16) | 220);
2316 CNIC_WR(dev, BNX2_HC_CMD_TICKS, (64 << 16) | 220);
2317
2318 err = cnic_setup_5709_context(dev, 1);
2319 if (err)
2320 return err;
2321
2322 cnic_init_context(dev, KWQ_CID);
2323 cnic_init_context(dev, KCQ_CID);
2324
2325 cp->kwq_cid_addr = GET_CID_ADDR(KWQ_CID);
2326 cp->kwq_io_addr = MB_GET_CID_ADDR(KWQ_CID) + L5_KRNLQ_HOST_QIDX;
2327
2328 cp->max_kwq_idx = MAX_KWQ_IDX;
2329 cp->kwq_prod_idx = 0;
2330 cp->kwq_con_idx = 0;
2331 cp->cnic_local_flags |= CNIC_LCL_FL_KWQ_INIT;
2332
2333 if (CHIP_NUM(cp) == CHIP_NUM_5706 || CHIP_NUM(cp) == CHIP_NUM_5708)
2334 cp->kwq_con_idx_ptr = &sblk->status_rx_quick_consumer_index15;
2335 else
2336 cp->kwq_con_idx_ptr = &sblk->status_cmd_consumer_index;
2337
2338 /* Initialize the kernel work queue context. */
2339 val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2340 (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2341 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_TYPE, val);
2342
2343 val = (BCM_PAGE_SIZE / sizeof(struct kwqe) - 1) << 16;
2344 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2345
2346 val = ((BCM_PAGE_SIZE / sizeof(struct kwqe)) << 16) | KWQ_PAGE_CNT;
2347 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2348
2349 val = (u32) ((u64) cp->kwq_info.pgtbl_map >> 32);
2350 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2351
2352 val = (u32) cp->kwq_info.pgtbl_map;
2353 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2354
2355 cp->kcq_cid_addr = GET_CID_ADDR(KCQ_CID);
2356 cp->kcq_io_addr = MB_GET_CID_ADDR(KCQ_CID) + L5_KRNLQ_HOST_QIDX;
2357
2358 cp->kcq_prod_idx = 0;
2359
2360 /* Initialize the kernel complete queue context. */
2361 val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2362 (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2363 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_TYPE, val);
2364
2365 val = (BCM_PAGE_SIZE / sizeof(struct kcqe) - 1) << 16;
2366 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2367
2368 val = ((BCM_PAGE_SIZE / sizeof(struct kcqe)) << 16) | KCQ_PAGE_CNT;
2369 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2370
2371 val = (u32) ((u64) cp->kcq_info.pgtbl_map >> 32);
2372 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2373
2374 val = (u32) cp->kcq_info.pgtbl_map;
2375 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2376
2377 cp->int_num = 0;
2378 if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2379 u32 sb_id = cp->status_blk_num;
2380 u32 sb = BNX2_L2CTX_STATUSB_NUM(sb_id);
2381
2382 cp->int_num = sb_id << BNX2_PCICFG_INT_ACK_CMD_INT_NUM_SHIFT;
2383 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2384 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2385 }
2386
2387 /* Enable Commnad Scheduler notification when we write to the
2388 * host producer index of the kernel contexts. */
2389 CNIC_WR(dev, BNX2_MQ_KNL_CMD_MASK1, 2);
2390
2391 /* Enable Command Scheduler notification when we write to either
2392 * the Send Queue or Receive Queue producer indexes of the kernel
2393 * bypass contexts. */
2394 CNIC_WR(dev, BNX2_MQ_KNL_BYP_CMD_MASK1, 7);
2395 CNIC_WR(dev, BNX2_MQ_KNL_BYP_WRITE_MASK1, 7);
2396
2397 /* Notify COM when the driver post an application buffer. */
2398 CNIC_WR(dev, BNX2_MQ_KNL_RX_V2P_MASK2, 0x2000);
2399
2400 /* Set the CP and COM doorbells. These two processors polls the
2401 * doorbell for a non zero value before running. This must be done
2402 * after setting up the kernel queue contexts. */
2403 cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 1);
2404 cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 1);
2405
2406 cnic_init_bnx2_tx_ring(dev);
2407 cnic_init_bnx2_rx_ring(dev);
2408
2409 err = cnic_init_bnx2_irq(dev);
2410 if (err) {
2411 printk(KERN_ERR PFX "%s: cnic_init_irq failed\n",
2412 dev->netdev->name);
2413 cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2414 cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2415 return err;
2416 }
2417
2418 return 0;
2419}
2420
2421static int cnic_start_hw(struct cnic_dev *dev)
2422{
2423 struct cnic_local *cp = dev->cnic_priv;
2424 struct cnic_eth_dev *ethdev = cp->ethdev;
2425 int err;
2426
2427 if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
2428 return -EALREADY;
2429
2430 err = ethdev->drv_register_cnic(dev->netdev, cp->cnic_ops, dev);
2431 if (err) {
2432 printk(KERN_ERR PFX "%s: register_cnic failed\n",
2433 dev->netdev->name);
2434 goto err2;
2435 }
2436
2437 dev->regview = ethdev->io_base;
2438 cp->chip_id = ethdev->chip_id;
2439 pci_dev_get(dev->pcidev);
2440 cp->func = PCI_FUNC(dev->pcidev->devfn);
2441 cp->status_blk = ethdev->irq_arr[0].status_blk;
2442 cp->status_blk_num = ethdev->irq_arr[0].status_blk_num;
2443
2444 err = cp->alloc_resc(dev);
2445 if (err) {
2446 printk(KERN_ERR PFX "%s: allocate resource failure\n",
2447 dev->netdev->name);
2448 goto err1;
2449 }
2450
2451 err = cp->start_hw(dev);
2452 if (err)
2453 goto err1;
2454
2455 err = cnic_cm_open(dev);
2456 if (err)
2457 goto err1;
2458
2459 set_bit(CNIC_F_CNIC_UP, &dev->flags);
2460
2461 cp->enable_int(dev);
2462
2463 return 0;
2464
2465err1:
2466 ethdev->drv_unregister_cnic(dev->netdev);
2467 cp->free_resc(dev);
2468 pci_dev_put(dev->pcidev);
2469err2:
2470 return err;
2471}
2472
2473static void cnic_stop_bnx2_hw(struct cnic_dev *dev)
2474{
2475 struct cnic_local *cp = dev->cnic_priv;
2476 struct cnic_eth_dev *ethdev = cp->ethdev;
2477
2478 cnic_disable_bnx2_int_sync(dev);
2479
2480 cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2481 cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2482
2483 cnic_init_context(dev, KWQ_CID);
2484 cnic_init_context(dev, KCQ_CID);
2485
2486 cnic_setup_5709_context(dev, 0);
2487 cnic_free_irq(dev);
2488
2489 ethdev->drv_unregister_cnic(dev->netdev);
2490
2491 cnic_free_resc(dev);
2492}
2493
2494static void cnic_stop_hw(struct cnic_dev *dev)
2495{
2496 if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2497 struct cnic_local *cp = dev->cnic_priv;
2498
2499 clear_bit(CNIC_F_CNIC_UP, &dev->flags);
2500 rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], NULL);
2501 synchronize_rcu();
2502 cnic_cm_shutdown(dev);
2503 cp->stop_hw(dev);
2504 pci_dev_put(dev->pcidev);
2505 }
2506}
2507
2508static void cnic_free_dev(struct cnic_dev *dev)
2509{
2510 int i = 0;
2511
2512 while ((atomic_read(&dev->ref_count) != 0) && i < 10) {
2513 msleep(100);
2514 i++;
2515 }
2516 if (atomic_read(&dev->ref_count) != 0)
2517 printk(KERN_ERR PFX "%s: Failed waiting for ref count to go"
2518 " to zero.\n", dev->netdev->name);
2519
2520 printk(KERN_INFO PFX "Removed CNIC device: %s\n", dev->netdev->name);
2521 dev_put(dev->netdev);
2522 kfree(dev);
2523}
2524
2525static struct cnic_dev *cnic_alloc_dev(struct net_device *dev,
2526 struct pci_dev *pdev)
2527{
2528 struct cnic_dev *cdev;
2529 struct cnic_local *cp;
2530 int alloc_size;
2531
2532 alloc_size = sizeof(struct cnic_dev) + sizeof(struct cnic_local);
2533
2534 cdev = kzalloc(alloc_size , GFP_KERNEL);
2535 if (cdev == NULL) {
2536 printk(KERN_ERR PFX "%s: allocate dev struct failure\n",
2537 dev->name);
2538 return NULL;
2539 }
2540
2541 cdev->netdev = dev;
2542 cdev->cnic_priv = (char *)cdev + sizeof(struct cnic_dev);
2543 cdev->register_device = cnic_register_device;
2544 cdev->unregister_device = cnic_unregister_device;
2545 cdev->iscsi_nl_msg_recv = cnic_iscsi_nl_msg_recv;
2546
2547 cp = cdev->cnic_priv;
2548 cp->dev = cdev;
2549 cp->uio_dev = -1;
2550 cp->l2_single_buf_size = 0x400;
2551 cp->l2_rx_ring_size = 3;
2552
2553 spin_lock_init(&cp->cnic_ulp_lock);
2554
2555 printk(KERN_INFO PFX "Added CNIC device: %s\n", dev->name);
2556
2557 return cdev;
2558}
2559
2560static struct cnic_dev *init_bnx2_cnic(struct net_device *dev)
2561{
2562 struct pci_dev *pdev;
2563 struct cnic_dev *cdev;
2564 struct cnic_local *cp;
2565 struct cnic_eth_dev *ethdev = NULL;
e2ee3616 2566 struct cnic_eth_dev *(*probe)(struct net_device *) = NULL;
a4636960 2567
e2ee3616 2568 probe = symbol_get(bnx2_cnic_probe);
a4636960
MC		 2569 if (probe) {
2570 ethdev = (*probe)(dev);
2571 symbol_put_addr(probe);
2572 }
2573 if (!ethdev)
2574 return NULL;
2575
2576 pdev = ethdev->pdev;
2577 if (!pdev)
2578 return NULL;
2579
2580 dev_hold(dev);
2581 pci_dev_get(pdev);
2582 if (pdev->device == PCI_DEVICE_ID_NX2_5709 ||
2583 pdev->device == PCI_DEVICE_ID_NX2_5709S) {
2584 u8 rev;
2585
2586 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
2587 if (rev < 0x10) {
2588 pci_dev_put(pdev);
2589 goto cnic_err;
2590 }
2591 }
2592 pci_dev_put(pdev);
2593
2594 cdev = cnic_alloc_dev(dev, pdev);
2595 if (cdev == NULL)
2596 goto cnic_err;
2597
2598 set_bit(CNIC_F_BNX2_CLASS, &cdev->flags);
2599 cdev->submit_kwqes = cnic_submit_bnx2_kwqes;
2600
2601 cp = cdev->cnic_priv;
2602 cp->ethdev = ethdev;
2603 cdev->pcidev = pdev;
2604
2605 cp->cnic_ops = &cnic_bnx2_ops;
2606 cp->start_hw = cnic_start_bnx2_hw;
2607 cp->stop_hw = cnic_stop_bnx2_hw;
2608 cp->setup_pgtbl = cnic_setup_page_tbl;
2609 cp->alloc_resc = cnic_alloc_bnx2_resc;
2610 cp->free_resc = cnic_free_resc;
2611 cp->start_cm = cnic_cm_init_bnx2_hw;
2612 cp->stop_cm = cnic_cm_stop_bnx2_hw;
2613 cp->enable_int = cnic_enable_bnx2_int;
2614 cp->disable_int_sync = cnic_disable_bnx2_int_sync;
2615 cp->close_conn = cnic_close_bnx2_conn;
2616 cp->next_idx = cnic_bnx2_next_idx;
2617 cp->hw_idx = cnic_bnx2_hw_idx;
2618 return cdev;
2619
2620cnic_err:
2621 dev_put(dev);
2622 return NULL;
2623}
2624
2625static struct cnic_dev *is_cnic_dev(struct net_device *dev)
2626{
2627 struct ethtool_drvinfo drvinfo;
2628 struct cnic_dev *cdev = NULL;
2629
2630 if (dev->ethtool_ops && dev->ethtool_ops->get_drvinfo) {
2631 memset(&drvinfo, 0, sizeof(drvinfo));
2632 dev->ethtool_ops->get_drvinfo(dev, &drvinfo);
2633
2634 if (!strcmp(drvinfo.driver, "bnx2"))
2635 cdev = init_bnx2_cnic(dev);
2636 if (cdev) {
2637 write_lock(&cnic_dev_lock);
2638 list_add(&cdev->list, &cnic_dev_list);
2639 write_unlock(&cnic_dev_lock);
2640 }
2641 }
2642 return cdev;
2643}
2644
2645/**
2646 * netdev event handler
2647 */
2648static int cnic_netdev_event(struct notifier_block *this, unsigned long event,
2649 void *ptr)
2650{
2651 struct net_device *netdev = ptr;
2652 struct cnic_dev *dev;
2653 int if_type;
2654 int new_dev = 0;
2655
2656 dev = cnic_from_netdev(netdev);
2657
2658 if (!dev && (event == NETDEV_REGISTER || event == NETDEV_UP)) {
2659 /* Check for the hot-plug device */
2660 dev = is_cnic_dev(netdev);
2661 if (dev) {
2662 new_dev = 1;
2663 cnic_hold(dev);
2664 }
2665 }
2666 if (dev) {
2667 struct cnic_local *cp = dev->cnic_priv;
2668
2669 if (new_dev)
2670 cnic_ulp_init(dev);
2671 else if (event == NETDEV_UNREGISTER)
2672 cnic_ulp_exit(dev);
2673 else if (event == NETDEV_UP) {
2674 mutex_lock(&cnic_lock);
2675 if (!cnic_start_hw(dev))
2676 cnic_ulp_start(dev);
2677 mutex_unlock(&cnic_lock);
2678 }
2679
2680 rcu_read_lock();
2681 for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
2682 struct cnic_ulp_ops *ulp_ops;
2683 void *ctx;
2684
2685 ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
2686 if (!ulp_ops || !ulp_ops->indicate_netevent)
2687 continue;
2688
2689 ctx = cp->ulp_handle[if_type];
2690
2691 ulp_ops->indicate_netevent(ctx, event);
2692 }
2693 rcu_read_unlock();
2694
2695 if (event == NETDEV_GOING_DOWN) {
2696 mutex_lock(&cnic_lock);
2697 cnic_ulp_stop(dev);
2698 cnic_stop_hw(dev);
2699 mutex_unlock(&cnic_lock);
2700 } else if (event == NETDEV_UNREGISTER) {
2701 write_lock(&cnic_dev_lock);
2702 list_del_init(&dev->list);
2703 write_unlock(&cnic_dev_lock);
2704
2705 cnic_put(dev);
2706 cnic_free_dev(dev);
2707 goto done;
2708 }
2709 cnic_put(dev);
2710 }
2711done:
2712 return NOTIFY_DONE;
2713}
2714
2715static struct notifier_block cnic_netdev_notifier = {
2716 .notifier_call = cnic_netdev_event
2717};
2718
2719static void cnic_release(void)
2720{
2721 struct cnic_dev *dev;
2722
2723 while (!list_empty(&cnic_dev_list)) {
2724 dev = list_entry(cnic_dev_list.next, struct cnic_dev, list);
2725 if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2726 cnic_ulp_stop(dev);
2727 cnic_stop_hw(dev);
2728 }
2729
2730 cnic_ulp_exit(dev);
2731 list_del_init(&dev->list);
2732 cnic_free_dev(dev);
2733 }
2734}
2735
2736static int __init cnic_init(void)
2737{
2738 int rc = 0;
2739
2740 printk(KERN_INFO "%s", version);
2741
2742 rc = register_netdevice_notifier(&cnic_netdev_notifier);
2743 if (rc) {
2744 cnic_release();
2745 return rc;
2746 }
2747
2748 return 0;
2749}
2750
2751static void __exit cnic_exit(void)
2752{
2753 unregister_netdevice_notifier(&cnic_netdev_notifier);
2754 cnic_release();
2755 return;
2756}
2757
2758module_init(cnic_init);
2759module_exit(cnic_exit);
Linux kernel - Deliverables
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