[SCSI] cnic: Add new Broadcom CNIC driver.
[linux-2.6.git] / drivers / net / cnic.c
1 /* cnic.c: Broadcom CNIC core network driver.
2  *
3  * Copyright (c) 2006-2009 Broadcom Corporation
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation.
8  *
9  * Original skeleton written by: John(Zongxi) Chen (zongxi@broadcom.com)
10  * Modified and maintained by: Michael Chan <mchan@broadcom.com>
11  */
12
13 #include <linux/module.h>
14
15 #include <linux/kernel.h>
16 #include <linux/errno.h>
17 #include <linux/list.h>
18 #include <linux/slab.h>
19 #include <linux/pci.h>
20 #include <linux/init.h>
21 #include <linux/netdevice.h>
22 #include <linux/uio_driver.h>
23 #include <linux/in.h>
24 #include <linux/dma-mapping.h>
25 #include <linux/delay.h>
26 #include <linux/ethtool.h>
27 #include <linux/if_vlan.h>
28 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
29 #define BCM_VLAN 1
30 #endif
31 #include <net/ip.h>
32 #include <net/tcp.h>
33 #include <net/route.h>
34 #include <net/ipv6.h>
35 #include <net/ip6_route.h>
36 #include <scsi/iscsi_if.h>
37
38 #include "cnic_if.h"
39 #include "bnx2.h"
40 #include "cnic.h"
41 #include "cnic_defs.h"
42
43 #define DRV_MODULE_NAME         "cnic"
44 #define PFX DRV_MODULE_NAME     ": "
45
46 static char version[] __devinitdata =
47         "Broadcom NetXtreme II CNIC Driver " DRV_MODULE_NAME " v" CNIC_MODULE_VERSION " (" CNIC_MODULE_RELDATE ")\n";
48
49 MODULE_AUTHOR("Michael Chan <mchan@broadcom.com> and John(Zongxi) "
50               "Chen (zongxi@broadcom.com");
51 MODULE_DESCRIPTION("Broadcom NetXtreme II CNIC Driver");
52 MODULE_LICENSE("GPL");
53 MODULE_VERSION(CNIC_MODULE_VERSION);
54
55 static LIST_HEAD(cnic_dev_list);
56 static DEFINE_RWLOCK(cnic_dev_lock);
57 static DEFINE_MUTEX(cnic_lock);
58
59 static struct cnic_ulp_ops *cnic_ulp_tbl[MAX_CNIC_ULP_TYPE];
60
61 static int cnic_service_bnx2(void *, void *);
62 static int cnic_ctl(void *, struct cnic_ctl_info *);
63
64 static struct cnic_ops cnic_bnx2_ops = {
65         .cnic_owner     = THIS_MODULE,
66         .cnic_handler   = cnic_service_bnx2,
67         .cnic_ctl       = cnic_ctl,
68 };
69
70 static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *);
71 static void cnic_init_bnx2_tx_ring(struct cnic_dev *);
72 static void cnic_init_bnx2_rx_ring(struct cnic_dev *);
73 static int cnic_cm_set_pg(struct cnic_sock *);
74
75 static int cnic_uio_open(struct uio_info *uinfo, struct inode *inode)
76 {
77         struct cnic_dev *dev = uinfo->priv;
78         struct cnic_local *cp = dev->cnic_priv;
79
80         if (!capable(CAP_NET_ADMIN))
81                 return -EPERM;
82
83         if (cp->uio_dev != -1)
84                 return -EBUSY;
85
86         cp->uio_dev = iminor(inode);
87
88         cnic_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
96 static 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
105 static inline void cnic_hold(struct cnic_dev *dev)
106 {
107         atomic_inc(&dev->ref_count);
108 }
109
110 static inline void cnic_put(struct cnic_dev *dev)
111 {
112         atomic_dec(&dev->ref_count);
113 }
114
115 static inline void csk_hold(struct cnic_sock *csk)
116 {
117         atomic_inc(&csk->ref_count);
118 }
119
120 static inline void csk_put(struct cnic_sock *csk)
121 {
122         atomic_dec(&csk->ref_count);
123 }
124
125 static struct cnic_dev *cnic_from_netdev(struct net_device *netdev)
126 {
127         struct cnic_dev *cdev;
128
129         read_lock(&cnic_dev_lock);
130         list_for_each_entry(cdev, &cnic_dev_list, list) {
131                 if (netdev == cdev->netdev) {
132                         cnic_hold(cdev);
133                         read_unlock(&cnic_dev_lock);
134                         return cdev;
135                 }
136         }
137         read_unlock(&cnic_dev_lock);
138         return NULL;
139 }
140
141 static 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
155 static 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
168 static 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
181 static int cnic_in_use(struct cnic_sock *csk)
182 {
183         return test_bit(SK_F_INUSE, &csk->flags);
184 }
185
186 static 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
197 static 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();
230         ulp_ops = rcu_dereference(cp->ulp_ops[CNIC_ULP_ISCSI]);
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
237 static 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
279 static 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
292 static 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
306 static 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
322 int cnic_register_driver(int ulp_type, struct cnic_ulp_ops *ulp_ops)
323 {
324         struct cnic_dev *dev;
325
326         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
327                 printk(KERN_ERR PFX "cnic_register_driver: Bad type %d\n",
328                        ulp_type);
329                 return -EINVAL;
330         }
331         mutex_lock(&cnic_lock);
332         if (cnic_ulp_tbl[ulp_type]) {
333                 printk(KERN_ERR PFX "cnic_register_driver: Type %d has already "
334                                     "been registered\n", ulp_type);
335                 mutex_unlock(&cnic_lock);
336                 return -EBUSY;
337         }
338
339         read_lock(&cnic_dev_lock);
340         list_for_each_entry(dev, &cnic_dev_list, list) {
341                 struct cnic_local *cp = dev->cnic_priv;
342
343                 clear_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]);
344         }
345         read_unlock(&cnic_dev_lock);
346
347         rcu_assign_pointer(cnic_ulp_tbl[ulp_type], ulp_ops);
348         mutex_unlock(&cnic_lock);
349
350         /* Prevent race conditions with netdev_event */
351         rtnl_lock();
352         read_lock(&cnic_dev_lock);
353         list_for_each_entry(dev, &cnic_dev_list, list) {
354                 struct cnic_local *cp = dev->cnic_priv;
355
356                 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]))
357                         ulp_ops->cnic_init(dev);
358         }
359         read_unlock(&cnic_dev_lock);
360         rtnl_unlock();
361
362         return 0;
363 }
364
365 int cnic_unregister_driver(int ulp_type)
366 {
367         struct cnic_dev *dev;
368
369         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
370                 printk(KERN_ERR PFX "cnic_unregister_driver: Bad type %d\n",
371                        ulp_type);
372                 return -EINVAL;
373         }
374         mutex_lock(&cnic_lock);
375         if (!cnic_ulp_tbl[ulp_type]) {
376                 printk(KERN_ERR PFX "cnic_unregister_driver: Type %d has not "
377                                     "been registered\n", ulp_type);
378                 goto out_unlock;
379         }
380         read_lock(&cnic_dev_lock);
381         list_for_each_entry(dev, &cnic_dev_list, list) {
382                 struct cnic_local *cp = dev->cnic_priv;
383
384                 if (rcu_dereference(cp->ulp_ops[ulp_type])) {
385                         printk(KERN_ERR PFX "cnic_unregister_driver: Type %d "
386                                "still has devices registered\n", ulp_type);
387                         read_unlock(&cnic_dev_lock);
388                         goto out_unlock;
389                 }
390         }
391         read_unlock(&cnic_dev_lock);
392
393         rcu_assign_pointer(cnic_ulp_tbl[ulp_type], NULL);
394
395         mutex_unlock(&cnic_lock);
396         synchronize_rcu();
397         return 0;
398
399 out_unlock:
400         mutex_unlock(&cnic_lock);
401         return -EINVAL;
402 }
403
404 static int cnic_start_hw(struct cnic_dev *);
405 static void cnic_stop_hw(struct cnic_dev *);
406
407 static int cnic_register_device(struct cnic_dev *dev, int ulp_type,
408                                 void *ulp_ctx)
409 {
410         struct cnic_local *cp = dev->cnic_priv;
411         struct cnic_ulp_ops *ulp_ops;
412
413         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
414                 printk(KERN_ERR PFX "cnic_register_device: Bad type %d\n",
415                        ulp_type);
416                 return -EINVAL;
417         }
418         mutex_lock(&cnic_lock);
419         if (cnic_ulp_tbl[ulp_type] == NULL) {
420                 printk(KERN_ERR PFX "cnic_register_device: Driver with type %d "
421                                     "has not been registered\n", ulp_type);
422                 mutex_unlock(&cnic_lock);
423                 return -EAGAIN;
424         }
425         if (rcu_dereference(cp->ulp_ops[ulp_type])) {
426                 printk(KERN_ERR PFX "cnic_register_device: Type %d has already "
427                        "been registered to this device\n", ulp_type);
428                 mutex_unlock(&cnic_lock);
429                 return -EBUSY;
430         }
431
432         clear_bit(ULP_F_START, &cp->ulp_flags[ulp_type]);
433         cp->ulp_handle[ulp_type] = ulp_ctx;
434         ulp_ops = cnic_ulp_tbl[ulp_type];
435         rcu_assign_pointer(cp->ulp_ops[ulp_type], ulp_ops);
436         cnic_hold(dev);
437
438         if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
439                 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[ulp_type]))
440                         ulp_ops->cnic_start(cp->ulp_handle[ulp_type]);
441
442         mutex_unlock(&cnic_lock);
443
444         return 0;
445
446 }
447 EXPORT_SYMBOL(cnic_register_driver);
448
449 static int cnic_unregister_device(struct cnic_dev *dev, int ulp_type)
450 {
451         struct cnic_local *cp = dev->cnic_priv;
452
453         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
454                 printk(KERN_ERR PFX "cnic_unregister_device: Bad type %d\n",
455                        ulp_type);
456                 return -EINVAL;
457         }
458         mutex_lock(&cnic_lock);
459         if (rcu_dereference(cp->ulp_ops[ulp_type])) {
460                 rcu_assign_pointer(cp->ulp_ops[ulp_type], NULL);
461                 cnic_put(dev);
462         } else {
463                 printk(KERN_ERR PFX "cnic_unregister_device: device not "
464                        "registered to this ulp type %d\n", ulp_type);
465                 mutex_unlock(&cnic_lock);
466                 return -EINVAL;
467         }
468         mutex_unlock(&cnic_lock);
469
470         synchronize_rcu();
471
472         return 0;
473 }
474 EXPORT_SYMBOL(cnic_unregister_driver);
475
476 static int cnic_init_id_tbl(struct cnic_id_tbl *id_tbl, u32 size, u32 start_id)
477 {
478         id_tbl->start = start_id;
479         id_tbl->max = size;
480         id_tbl->next = 0;
481         spin_lock_init(&id_tbl->lock);
482         id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
483         if (!id_tbl->table)
484                 return -ENOMEM;
485
486         return 0;
487 }
488
489 static void cnic_free_id_tbl(struct cnic_id_tbl *id_tbl)
490 {
491         kfree(id_tbl->table);
492         id_tbl->table = NULL;
493 }
494
495 static int cnic_alloc_id(struct cnic_id_tbl *id_tbl, u32 id)
496 {
497         int ret = -1;
498
499         id -= id_tbl->start;
500         if (id >= id_tbl->max)
501                 return ret;
502
503         spin_lock(&id_tbl->lock);
504         if (!test_bit(id, id_tbl->table)) {
505                 set_bit(id, id_tbl->table);
506                 ret = 0;
507         }
508         spin_unlock(&id_tbl->lock);
509         return ret;
510 }
511
512 /* Returns -1 if not successful */
513 static u32 cnic_alloc_new_id(struct cnic_id_tbl *id_tbl)
514 {
515         u32 id;
516
517         spin_lock(&id_tbl->lock);
518         id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
519         if (id >= id_tbl->max) {
520                 id = -1;
521                 if (id_tbl->next != 0) {
522                         id = find_first_zero_bit(id_tbl->table, id_tbl->next);
523                         if (id >= id_tbl->next)
524                                 id = -1;
525                 }
526         }
527
528         if (id < id_tbl->max) {
529                 set_bit(id, id_tbl->table);
530                 id_tbl->next = (id + 1) & (id_tbl->max - 1);
531                 id += id_tbl->start;
532         }
533
534         spin_unlock(&id_tbl->lock);
535
536         return id;
537 }
538
539 static void cnic_free_id(struct cnic_id_tbl *id_tbl, u32 id)
540 {
541         if (id == -1)
542                 return;
543
544         id -= id_tbl->start;
545         if (id >= id_tbl->max)
546                 return;
547
548         clear_bit(id, id_tbl->table);
549 }
550
551 static void cnic_free_dma(struct cnic_dev *dev, struct cnic_dma *dma)
552 {
553         int i;
554
555         if (!dma->pg_arr)
556                 return;
557
558         for (i = 0; i < dma->num_pages; i++) {
559                 if (dma->pg_arr[i]) {
560                         pci_free_consistent(dev->pcidev, BCM_PAGE_SIZE,
561                                             dma->pg_arr[i], dma->pg_map_arr[i]);
562                         dma->pg_arr[i] = NULL;
563                 }
564         }
565         if (dma->pgtbl) {
566                 pci_free_consistent(dev->pcidev, dma->pgtbl_size,
567                                     dma->pgtbl, dma->pgtbl_map);
568                 dma->pgtbl = NULL;
569         }
570         kfree(dma->pg_arr);
571         dma->pg_arr = NULL;
572         dma->num_pages = 0;
573 }
574
575 static void cnic_setup_page_tbl(struct cnic_dev *dev, struct cnic_dma *dma)
576 {
577         int i;
578         u32 *page_table = dma->pgtbl;
579
580         for (i = 0; i < dma->num_pages; i++) {
581                 /* Each entry needs to be in big endian format. */
582                 *page_table = (u32) ((u64) dma->pg_map_arr[i] >> 32);
583                 page_table++;
584                 *page_table = (u32) dma->pg_map_arr[i];
585                 page_table++;
586         }
587 }
588
589 static int cnic_alloc_dma(struct cnic_dev *dev, struct cnic_dma *dma,
590                           int pages, int use_pg_tbl)
591 {
592         int i, size;
593         struct cnic_local *cp = dev->cnic_priv;
594
595         size = pages * (sizeof(void *) + sizeof(dma_addr_t));
596         dma->pg_arr = kzalloc(size, GFP_ATOMIC);
597         if (dma->pg_arr == NULL)
598                 return -ENOMEM;
599
600         dma->pg_map_arr = (dma_addr_t *) (dma->pg_arr + pages);
601         dma->num_pages = pages;
602
603         for (i = 0; i < pages; i++) {
604                 dma->pg_arr[i] = pci_alloc_consistent(dev->pcidev,
605                                                       BCM_PAGE_SIZE,
606                                                       &dma->pg_map_arr[i]);
607                 if (dma->pg_arr[i] == NULL)
608                         goto error;
609         }
610         if (!use_pg_tbl)
611                 return 0;
612
613         dma->pgtbl_size = ((pages * 8) + BCM_PAGE_SIZE - 1) &
614                           ~(BCM_PAGE_SIZE - 1);
615         dma->pgtbl = pci_alloc_consistent(dev->pcidev, dma->pgtbl_size,
616                                           &dma->pgtbl_map);
617         if (dma->pgtbl == NULL)
618                 goto error;
619
620         cp->setup_pgtbl(dev, dma);
621
622         return 0;
623
624 error:
625         cnic_free_dma(dev, dma);
626         return -ENOMEM;
627 }
628
629 static void cnic_free_resc(struct cnic_dev *dev)
630 {
631         struct cnic_local *cp = dev->cnic_priv;
632         int i = 0;
633
634         if (cp->cnic_uinfo) {
635                 cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
636                 while (cp->uio_dev != -1 && i < 15) {
637                         msleep(100);
638                         i++;
639                 }
640                 uio_unregister_device(cp->cnic_uinfo);
641                 kfree(cp->cnic_uinfo);
642                 cp->cnic_uinfo = NULL;
643         }
644
645         if (cp->l2_buf) {
646                 pci_free_consistent(dev->pcidev, cp->l2_buf_size,
647                                     cp->l2_buf, cp->l2_buf_map);
648                 cp->l2_buf = NULL;
649         }
650
651         if (cp->l2_ring) {
652                 pci_free_consistent(dev->pcidev, cp->l2_ring_size,
653                                     cp->l2_ring, cp->l2_ring_map);
654                 cp->l2_ring = NULL;
655         }
656
657         for (i = 0; i < cp->ctx_blks; i++) {
658                 if (cp->ctx_arr[i].ctx) {
659                         pci_free_consistent(dev->pcidev, cp->ctx_blk_size,
660                                             cp->ctx_arr[i].ctx,
661                                             cp->ctx_arr[i].mapping);
662                         cp->ctx_arr[i].ctx = NULL;
663                 }
664         }
665         kfree(cp->ctx_arr);
666         cp->ctx_arr = NULL;
667         cp->ctx_blks = 0;
668
669         cnic_free_dma(dev, &cp->gbl_buf_info);
670         cnic_free_dma(dev, &cp->conn_buf_info);
671         cnic_free_dma(dev, &cp->kwq_info);
672         cnic_free_dma(dev, &cp->kcq_info);
673         kfree(cp->iscsi_tbl);
674         cp->iscsi_tbl = NULL;
675         kfree(cp->ctx_tbl);
676         cp->ctx_tbl = NULL;
677
678         cnic_free_id_tbl(&cp->cid_tbl);
679 }
680
681 static int cnic_alloc_context(struct cnic_dev *dev)
682 {
683         struct cnic_local *cp = dev->cnic_priv;
684
685         if (CHIP_NUM(cp) == CHIP_NUM_5709) {
686                 int i, k, arr_size;
687
688                 cp->ctx_blk_size = BCM_PAGE_SIZE;
689                 cp->cids_per_blk = BCM_PAGE_SIZE / 128;
690                 arr_size = BNX2_MAX_CID / cp->cids_per_blk *
691                            sizeof(struct cnic_ctx);
692                 cp->ctx_arr = kzalloc(arr_size, GFP_KERNEL);
693                 if (cp->ctx_arr == NULL)
694                         return -ENOMEM;
695
696                 k = 0;
697                 for (i = 0; i < 2; i++) {
698                         u32 j, reg, off, lo, hi;
699
700                         if (i == 0)
701                                 off = BNX2_PG_CTX_MAP;
702                         else
703                                 off = BNX2_ISCSI_CTX_MAP;
704
705                         reg = cnic_reg_rd_ind(dev, off);
706                         lo = reg >> 16;
707                         hi = reg & 0xffff;
708                         for (j = lo; j < hi; j += cp->cids_per_blk, k++)
709                                 cp->ctx_arr[k].cid = j;
710                 }
711
712                 cp->ctx_blks = k;
713                 if (cp->ctx_blks >= (BNX2_MAX_CID / cp->cids_per_blk)) {
714                         cp->ctx_blks = 0;
715                         return -ENOMEM;
716                 }
717
718                 for (i = 0; i < cp->ctx_blks; i++) {
719                         cp->ctx_arr[i].ctx =
720                                 pci_alloc_consistent(dev->pcidev, BCM_PAGE_SIZE,
721                                                      &cp->ctx_arr[i].mapping);
722                         if (cp->ctx_arr[i].ctx == NULL)
723                                 return -ENOMEM;
724                 }
725         }
726         return 0;
727 }
728
729 static int cnic_alloc_bnx2_resc(struct cnic_dev *dev)
730 {
731         struct cnic_local *cp = dev->cnic_priv;
732         struct uio_info *uinfo;
733         int ret;
734
735         ret = cnic_alloc_dma(dev, &cp->kwq_info, KWQ_PAGE_CNT, 1);
736         if (ret)
737                 goto error;
738         cp->kwq = (struct kwqe **) cp->kwq_info.pg_arr;
739
740         ret = cnic_alloc_dma(dev, &cp->kcq_info, KCQ_PAGE_CNT, 1);
741         if (ret)
742                 goto error;
743         cp->kcq = (struct kcqe **) cp->kcq_info.pg_arr;
744
745         ret = cnic_alloc_context(dev);
746         if (ret)
747                 goto error;
748
749         cp->l2_ring_size = 2 * 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                 goto error;
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                 goto error;
761
762         uinfo = kzalloc(sizeof(*uinfo), GFP_ATOMIC);
763         if (!uinfo)
764                 goto error;
765
766         uinfo->mem[0].addr = dev->netdev->base_addr;
767         uinfo->mem[0].internal_addr = dev->regview;
768         uinfo->mem[0].size = dev->netdev->mem_end - dev->netdev->mem_start;
769         uinfo->mem[0].memtype = UIO_MEM_PHYS;
770
771         uinfo->mem[1].addr = (unsigned long) cp->status_blk & PAGE_MASK;
772         if (cp->ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX)
773                 uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE * 9;
774         else
775                 uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE;
776         uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
777
778         uinfo->mem[2].addr = (unsigned long) cp->l2_ring;
779         uinfo->mem[2].size = cp->l2_ring_size;
780         uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
781
782         uinfo->mem[3].addr = (unsigned long) cp->l2_buf;
783         uinfo->mem[3].size = cp->l2_buf_size;
784         uinfo->mem[3].memtype = UIO_MEM_LOGICAL;
785
786         uinfo->name = "bnx2_cnic";
787         uinfo->version = CNIC_MODULE_VERSION;
788         uinfo->irq = UIO_IRQ_CUSTOM;
789
790         uinfo->open = cnic_uio_open;
791         uinfo->release = cnic_uio_close;
792
793         uinfo->priv = dev;
794
795         ret = uio_register_device(&dev->pcidev->dev, uinfo);
796         if (ret) {
797                 kfree(uinfo);
798                 goto error;
799         }
800
801         cp->cnic_uinfo = uinfo;
802
803         return 0;
804
805 error:
806         cnic_free_resc(dev);
807         return ret;
808 }
809
810 static inline u32 cnic_kwq_avail(struct cnic_local *cp)
811 {
812         return cp->max_kwq_idx -
813                 ((cp->kwq_prod_idx - cp->kwq_con_idx) & cp->max_kwq_idx);
814 }
815
816 static int cnic_submit_bnx2_kwqes(struct cnic_dev *dev, struct kwqe *wqes[],
817                                   u32 num_wqes)
818 {
819         struct cnic_local *cp = dev->cnic_priv;
820         struct kwqe *prod_qe;
821         u16 prod, sw_prod, i;
822
823         if (!test_bit(CNIC_F_CNIC_UP, &dev->flags))
824                 return -EAGAIN;         /* bnx2 is down */
825
826         spin_lock_bh(&cp->cnic_ulp_lock);
827         if (num_wqes > cnic_kwq_avail(cp) &&
828             !(cp->cnic_local_flags & CNIC_LCL_FL_KWQ_INIT)) {
829                 spin_unlock_bh(&cp->cnic_ulp_lock);
830                 return -EAGAIN;
831         }
832
833         cp->cnic_local_flags &= ~CNIC_LCL_FL_KWQ_INIT;
834
835         prod = cp->kwq_prod_idx;
836         sw_prod = prod & MAX_KWQ_IDX;
837         for (i = 0; i < num_wqes; i++) {
838                 prod_qe = &cp->kwq[KWQ_PG(sw_prod)][KWQ_IDX(sw_prod)];
839                 memcpy(prod_qe, wqes[i], sizeof(struct kwqe));
840                 prod++;
841                 sw_prod = prod & MAX_KWQ_IDX;
842         }
843         cp->kwq_prod_idx = prod;
844
845         CNIC_WR16(dev, cp->kwq_io_addr, cp->kwq_prod_idx);
846
847         spin_unlock_bh(&cp->cnic_ulp_lock);
848         return 0;
849 }
850
851 static void service_kcqes(struct cnic_dev *dev, int num_cqes)
852 {
853         struct cnic_local *cp = dev->cnic_priv;
854         int i, j;
855
856         i = 0;
857         j = 1;
858         while (num_cqes) {
859                 struct cnic_ulp_ops *ulp_ops;
860                 int ulp_type;
861                 u32 kcqe_op_flag = cp->completed_kcq[i]->kcqe_op_flag;
862                 u32 kcqe_layer = kcqe_op_flag & KCQE_FLAGS_LAYER_MASK;
863
864                 if (unlikely(kcqe_op_flag & KCQE_RAMROD_COMPLETION))
865                         cnic_kwq_completion(dev, 1);
866
867                 while (j < num_cqes) {
868                         u32 next_op = cp->completed_kcq[i + j]->kcqe_op_flag;
869
870                         if ((next_op & KCQE_FLAGS_LAYER_MASK) != kcqe_layer)
871                                 break;
872
873                         if (unlikely(next_op & KCQE_RAMROD_COMPLETION))
874                                 cnic_kwq_completion(dev, 1);
875                         j++;
876                 }
877
878                 if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_RDMA)
879                         ulp_type = CNIC_ULP_RDMA;
880                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_ISCSI)
881                         ulp_type = CNIC_ULP_ISCSI;
882                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L4)
883                         ulp_type = CNIC_ULP_L4;
884                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L2)
885                         goto end;
886                 else {
887                         printk(KERN_ERR PFX "%s: Unknown type of KCQE(0x%x)\n",
888                                dev->netdev->name, kcqe_op_flag);
889                         goto end;
890                 }
891
892                 rcu_read_lock();
893                 ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
894                 if (likely(ulp_ops)) {
895                         ulp_ops->indicate_kcqes(cp->ulp_handle[ulp_type],
896                                                   cp->completed_kcq + i, j);
897                 }
898                 rcu_read_unlock();
899 end:
900                 num_cqes -= j;
901                 i += j;
902                 j = 1;
903         }
904         return;
905 }
906
907 static u16 cnic_bnx2_next_idx(u16 idx)
908 {
909         return idx + 1;
910 }
911
912 static u16 cnic_bnx2_hw_idx(u16 idx)
913 {
914         return idx;
915 }
916
917 static int cnic_get_kcqes(struct cnic_dev *dev, u16 hw_prod, u16 *sw_prod)
918 {
919         struct cnic_local *cp = dev->cnic_priv;
920         u16 i, ri, last;
921         struct kcqe *kcqe;
922         int kcqe_cnt = 0, last_cnt = 0;
923
924         i = ri = last = *sw_prod;
925         ri &= MAX_KCQ_IDX;
926
927         while ((i != hw_prod) && (kcqe_cnt < MAX_COMPLETED_KCQE)) {
928                 kcqe = &cp->kcq[KCQ_PG(ri)][KCQ_IDX(ri)];
929                 cp->completed_kcq[kcqe_cnt++] = kcqe;
930                 i = cp->next_idx(i);
931                 ri = i & MAX_KCQ_IDX;
932                 if (likely(!(kcqe->kcqe_op_flag & KCQE_FLAGS_NEXT))) {
933                         last_cnt = kcqe_cnt;
934                         last = i;
935                 }
936         }
937
938         *sw_prod = last;
939         return last_cnt;
940 }
941
942 static void cnic_chk_bnx2_pkt_rings(struct cnic_local *cp)
943 {
944         u16 rx_cons = *cp->rx_cons_ptr;
945         u16 tx_cons = *cp->tx_cons_ptr;
946
947         if (cp->tx_cons != tx_cons || cp->rx_cons != rx_cons) {
948                 cp->tx_cons = tx_cons;
949                 cp->rx_cons = rx_cons;
950                 uio_event_notify(cp->cnic_uinfo);
951         }
952 }
953
954 static int cnic_service_bnx2(void *data, void *status_blk)
955 {
956         struct cnic_dev *dev = data;
957         struct status_block *sblk = status_blk;
958         struct cnic_local *cp = dev->cnic_priv;
959         u32 status_idx = sblk->status_idx;
960         u16 hw_prod, sw_prod;
961         int kcqe_cnt;
962
963         if (unlikely(!test_bit(CNIC_F_CNIC_UP, &dev->flags)))
964                 return status_idx;
965
966         cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
967
968         hw_prod = sblk->status_completion_producer_index;
969         sw_prod = cp->kcq_prod_idx;
970         while (sw_prod != hw_prod) {
971                 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
972                 if (kcqe_cnt == 0)
973                         goto done;
974
975                 service_kcqes(dev, kcqe_cnt);
976
977                 /* Tell compiler that status_blk fields can change. */
978                 barrier();
979                 if (status_idx != sblk->status_idx) {
980                         status_idx = sblk->status_idx;
981                         cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
982                         hw_prod = sblk->status_completion_producer_index;
983                 } else
984                         break;
985         }
986
987 done:
988         CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
989
990         cp->kcq_prod_idx = sw_prod;
991
992         cnic_chk_bnx2_pkt_rings(cp);
993         return status_idx;
994 }
995
996 static void cnic_service_bnx2_msix(unsigned long data)
997 {
998         struct cnic_dev *dev = (struct cnic_dev *) data;
999         struct cnic_local *cp = dev->cnic_priv;
1000         struct status_block_msix *status_blk = cp->bnx2_status_blk;
1001         u32 status_idx = status_blk->status_idx;
1002         u16 hw_prod, sw_prod;
1003         int kcqe_cnt;
1004
1005         cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1006
1007         hw_prod = status_blk->status_completion_producer_index;
1008         sw_prod = cp->kcq_prod_idx;
1009         while (sw_prod != hw_prod) {
1010                 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
1011                 if (kcqe_cnt == 0)
1012                         goto done;
1013
1014                 service_kcqes(dev, kcqe_cnt);
1015
1016                 /* Tell compiler that status_blk fields can change. */
1017                 barrier();
1018                 if (status_idx != status_blk->status_idx) {
1019                         status_idx = status_blk->status_idx;
1020                         cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1021                         hw_prod = status_blk->status_completion_producer_index;
1022                 } else
1023                         break;
1024         }
1025
1026 done:
1027         CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
1028         cp->kcq_prod_idx = sw_prod;
1029
1030         cnic_chk_bnx2_pkt_rings(cp);
1031
1032         cp->last_status_idx = status_idx;
1033         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
1034                 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
1035 }
1036
1037 static irqreturn_t cnic_irq(int irq, void *dev_instance)
1038 {
1039         struct cnic_dev *dev = dev_instance;
1040         struct cnic_local *cp = dev->cnic_priv;
1041         u16 prod = cp->kcq_prod_idx & MAX_KCQ_IDX;
1042
1043         if (cp->ack_int)
1044                 cp->ack_int(dev);
1045
1046         prefetch(cp->status_blk);
1047         prefetch(&cp->kcq[KCQ_PG(prod)][KCQ_IDX(prod)]);
1048
1049         if (likely(test_bit(CNIC_F_CNIC_UP, &dev->flags)))
1050                 tasklet_schedule(&cp->cnic_irq_task);
1051
1052         return IRQ_HANDLED;
1053 }
1054
1055 static void cnic_ulp_stop(struct cnic_dev *dev)
1056 {
1057         struct cnic_local *cp = dev->cnic_priv;
1058         int if_type;
1059
1060         rcu_read_lock();
1061         for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1062                 struct cnic_ulp_ops *ulp_ops;
1063
1064                 ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
1065                 if (!ulp_ops)
1066                         continue;
1067
1068                 if (test_and_clear_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1069                         ulp_ops->cnic_stop(cp->ulp_handle[if_type]);
1070         }
1071         rcu_read_unlock();
1072 }
1073
1074 static void cnic_ulp_start(struct cnic_dev *dev)
1075 {
1076         struct cnic_local *cp = dev->cnic_priv;
1077         int if_type;
1078
1079         rcu_read_lock();
1080         for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1081                 struct cnic_ulp_ops *ulp_ops;
1082
1083                 ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
1084                 if (!ulp_ops || !ulp_ops->cnic_start)
1085                         continue;
1086
1087                 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1088                         ulp_ops->cnic_start(cp->ulp_handle[if_type]);
1089         }
1090         rcu_read_unlock();
1091 }
1092
1093 static int cnic_ctl(void *data, struct cnic_ctl_info *info)
1094 {
1095         struct cnic_dev *dev = data;
1096
1097         switch (info->cmd) {
1098         case CNIC_CTL_STOP_CMD:
1099                 cnic_hold(dev);
1100                 mutex_lock(&cnic_lock);
1101
1102                 cnic_ulp_stop(dev);
1103                 cnic_stop_hw(dev);
1104
1105                 mutex_unlock(&cnic_lock);
1106                 cnic_put(dev);
1107                 break;
1108         case CNIC_CTL_START_CMD:
1109                 cnic_hold(dev);
1110                 mutex_lock(&cnic_lock);
1111
1112                 if (!cnic_start_hw(dev))
1113                         cnic_ulp_start(dev);
1114
1115                 mutex_unlock(&cnic_lock);
1116                 cnic_put(dev);
1117                 break;
1118         default:
1119                 return -EINVAL;
1120         }
1121         return 0;
1122 }
1123
1124 static void cnic_ulp_init(struct cnic_dev *dev)
1125 {
1126         int i;
1127         struct cnic_local *cp = dev->cnic_priv;
1128
1129         rcu_read_lock();
1130         for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1131                 struct cnic_ulp_ops *ulp_ops;
1132
1133                 ulp_ops = rcu_dereference(cnic_ulp_tbl[i]);
1134                 if (!ulp_ops || !ulp_ops->cnic_init)
1135                         continue;
1136
1137                 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1138                         ulp_ops->cnic_init(dev);
1139
1140         }
1141         rcu_read_unlock();
1142 }
1143
1144 static void cnic_ulp_exit(struct cnic_dev *dev)
1145 {
1146         int i;
1147         struct cnic_local *cp = dev->cnic_priv;
1148
1149         rcu_read_lock();
1150         for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1151                 struct cnic_ulp_ops *ulp_ops;
1152
1153                 ulp_ops = rcu_dereference(cnic_ulp_tbl[i]);
1154                 if (!ulp_ops || !ulp_ops->cnic_exit)
1155                         continue;
1156
1157                 if (test_and_clear_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1158                         ulp_ops->cnic_exit(dev);
1159
1160         }
1161         rcu_read_unlock();
1162 }
1163
1164 static int cnic_cm_offload_pg(struct cnic_sock *csk)
1165 {
1166         struct cnic_dev *dev = csk->dev;
1167         struct l4_kwq_offload_pg *l4kwqe;
1168         struct kwqe *wqes[1];
1169
1170         l4kwqe = (struct l4_kwq_offload_pg *) &csk->kwqe1;
1171         memset(l4kwqe, 0, sizeof(*l4kwqe));
1172         wqes[0] = (struct kwqe *) l4kwqe;
1173
1174         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_OFFLOAD_PG;
1175         l4kwqe->flags =
1176                 L4_LAYER_CODE << L4_KWQ_OFFLOAD_PG_LAYER_CODE_SHIFT;
1177         l4kwqe->l2hdr_nbytes = ETH_HLEN;
1178
1179         l4kwqe->da0 = csk->ha[0];
1180         l4kwqe->da1 = csk->ha[1];
1181         l4kwqe->da2 = csk->ha[2];
1182         l4kwqe->da3 = csk->ha[3];
1183         l4kwqe->da4 = csk->ha[4];
1184         l4kwqe->da5 = csk->ha[5];
1185
1186         l4kwqe->sa0 = dev->mac_addr[0];
1187         l4kwqe->sa1 = dev->mac_addr[1];
1188         l4kwqe->sa2 = dev->mac_addr[2];
1189         l4kwqe->sa3 = dev->mac_addr[3];
1190         l4kwqe->sa4 = dev->mac_addr[4];
1191         l4kwqe->sa5 = dev->mac_addr[5];
1192
1193         l4kwqe->etype = ETH_P_IP;
1194         l4kwqe->ipid_count = DEF_IPID_COUNT;
1195         l4kwqe->host_opaque = csk->l5_cid;
1196
1197         if (csk->vlan_id) {
1198                 l4kwqe->pg_flags |= L4_KWQ_OFFLOAD_PG_VLAN_TAGGING;
1199                 l4kwqe->vlan_tag = csk->vlan_id;
1200                 l4kwqe->l2hdr_nbytes += 4;
1201         }
1202
1203         return dev->submit_kwqes(dev, wqes, 1);
1204 }
1205
1206 static int cnic_cm_update_pg(struct cnic_sock *csk)
1207 {
1208         struct cnic_dev *dev = csk->dev;
1209         struct l4_kwq_update_pg *l4kwqe;
1210         struct kwqe *wqes[1];
1211
1212         l4kwqe = (struct l4_kwq_update_pg *) &csk->kwqe1;
1213         memset(l4kwqe, 0, sizeof(*l4kwqe));
1214         wqes[0] = (struct kwqe *) l4kwqe;
1215
1216         l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPDATE_PG;
1217         l4kwqe->flags =
1218                 L4_LAYER_CODE << L4_KWQ_UPDATE_PG_LAYER_CODE_SHIFT;
1219         l4kwqe->pg_cid = csk->pg_cid;
1220
1221         l4kwqe->da0 = csk->ha[0];
1222         l4kwqe->da1 = csk->ha[1];
1223         l4kwqe->da2 = csk->ha[2];
1224         l4kwqe->da3 = csk->ha[3];
1225         l4kwqe->da4 = csk->ha[4];
1226         l4kwqe->da5 = csk->ha[5];
1227
1228         l4kwqe->pg_host_opaque = csk->l5_cid;
1229         l4kwqe->pg_valids = L4_KWQ_UPDATE_PG_VALIDS_DA;
1230
1231         return dev->submit_kwqes(dev, wqes, 1);
1232 }
1233
1234 static int cnic_cm_upload_pg(struct cnic_sock *csk)
1235 {
1236         struct cnic_dev *dev = csk->dev;
1237         struct l4_kwq_upload *l4kwqe;
1238         struct kwqe *wqes[1];
1239
1240         l4kwqe = (struct l4_kwq_upload *) &csk->kwqe1;
1241         memset(l4kwqe, 0, sizeof(*l4kwqe));
1242         wqes[0] = (struct kwqe *) l4kwqe;
1243
1244         l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPLOAD_PG;
1245         l4kwqe->flags =
1246                 L4_LAYER_CODE << L4_KWQ_UPLOAD_LAYER_CODE_SHIFT;
1247         l4kwqe->cid = csk->pg_cid;
1248
1249         return dev->submit_kwqes(dev, wqes, 1);
1250 }
1251
1252 static int cnic_cm_conn_req(struct cnic_sock *csk)
1253 {
1254         struct cnic_dev *dev = csk->dev;
1255         struct l4_kwq_connect_req1 *l4kwqe1;
1256         struct l4_kwq_connect_req2 *l4kwqe2;
1257         struct l4_kwq_connect_req3 *l4kwqe3;
1258         struct kwqe *wqes[3];
1259         u8 tcp_flags = 0;
1260         int num_wqes = 2;
1261
1262         l4kwqe1 = (struct l4_kwq_connect_req1 *) &csk->kwqe1;
1263         l4kwqe2 = (struct l4_kwq_connect_req2 *) &csk->kwqe2;
1264         l4kwqe3 = (struct l4_kwq_connect_req3 *) &csk->kwqe3;
1265         memset(l4kwqe1, 0, sizeof(*l4kwqe1));
1266         memset(l4kwqe2, 0, sizeof(*l4kwqe2));
1267         memset(l4kwqe3, 0, sizeof(*l4kwqe3));
1268
1269         l4kwqe3->op_code = L4_KWQE_OPCODE_VALUE_CONNECT3;
1270         l4kwqe3->flags =
1271                 L4_LAYER_CODE << L4_KWQ_CONNECT_REQ3_LAYER_CODE_SHIFT;
1272         l4kwqe3->ka_timeout = csk->ka_timeout;
1273         l4kwqe3->ka_interval = csk->ka_interval;
1274         l4kwqe3->ka_max_probe_count = csk->ka_max_probe_count;
1275         l4kwqe3->tos = csk->tos;
1276         l4kwqe3->ttl = csk->ttl;
1277         l4kwqe3->snd_seq_scale = csk->snd_seq_scale;
1278         l4kwqe3->pmtu = csk->mtu;
1279         l4kwqe3->rcv_buf = csk->rcv_buf;
1280         l4kwqe3->snd_buf = csk->snd_buf;
1281         l4kwqe3->seed = csk->seed;
1282
1283         wqes[0] = (struct kwqe *) l4kwqe1;
1284         if (test_bit(SK_F_IPV6, &csk->flags)) {
1285                 wqes[1] = (struct kwqe *) l4kwqe2;
1286                 wqes[2] = (struct kwqe *) l4kwqe3;
1287                 num_wqes = 3;
1288
1289                 l4kwqe1->conn_flags = L4_KWQ_CONNECT_REQ1_IP_V6;
1290                 l4kwqe2->op_code = L4_KWQE_OPCODE_VALUE_CONNECT2;
1291                 l4kwqe2->flags =
1292                         L4_KWQ_CONNECT_REQ2_LINKED_WITH_NEXT |
1293                         L4_LAYER_CODE << L4_KWQ_CONNECT_REQ2_LAYER_CODE_SHIFT;
1294                 l4kwqe2->src_ip_v6_2 = be32_to_cpu(csk->src_ip[1]);
1295                 l4kwqe2->src_ip_v6_3 = be32_to_cpu(csk->src_ip[2]);
1296                 l4kwqe2->src_ip_v6_4 = be32_to_cpu(csk->src_ip[3]);
1297                 l4kwqe2->dst_ip_v6_2 = be32_to_cpu(csk->dst_ip[1]);
1298                 l4kwqe2->dst_ip_v6_3 = be32_to_cpu(csk->dst_ip[2]);
1299                 l4kwqe2->dst_ip_v6_4 = be32_to_cpu(csk->dst_ip[3]);
1300                 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct ipv6hdr) -
1301                                sizeof(struct tcphdr);
1302         } else {
1303                 wqes[1] = (struct kwqe *) l4kwqe3;
1304                 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct iphdr) -
1305                                sizeof(struct tcphdr);
1306         }
1307
1308         l4kwqe1->op_code = L4_KWQE_OPCODE_VALUE_CONNECT1;
1309         l4kwqe1->flags =
1310                 (L4_LAYER_CODE << L4_KWQ_CONNECT_REQ1_LAYER_CODE_SHIFT) |
1311                  L4_KWQ_CONNECT_REQ3_LINKED_WITH_NEXT;
1312         l4kwqe1->cid = csk->cid;
1313         l4kwqe1->pg_cid = csk->pg_cid;
1314         l4kwqe1->src_ip = be32_to_cpu(csk->src_ip[0]);
1315         l4kwqe1->dst_ip = be32_to_cpu(csk->dst_ip[0]);
1316         l4kwqe1->src_port = be16_to_cpu(csk->src_port);
1317         l4kwqe1->dst_port = be16_to_cpu(csk->dst_port);
1318         if (csk->tcp_flags & SK_TCP_NO_DELAY_ACK)
1319                 tcp_flags |= L4_KWQ_CONNECT_REQ1_NO_DELAY_ACK;
1320         if (csk->tcp_flags & SK_TCP_KEEP_ALIVE)
1321                 tcp_flags |= L4_KWQ_CONNECT_REQ1_KEEP_ALIVE;
1322         if (csk->tcp_flags & SK_TCP_NAGLE)
1323                 tcp_flags |= L4_KWQ_CONNECT_REQ1_NAGLE_ENABLE;
1324         if (csk->tcp_flags & SK_TCP_TIMESTAMP)
1325                 tcp_flags |= L4_KWQ_CONNECT_REQ1_TIME_STAMP;
1326         if (csk->tcp_flags & SK_TCP_SACK)
1327                 tcp_flags |= L4_KWQ_CONNECT_REQ1_SACK;
1328         if (csk->tcp_flags & SK_TCP_SEG_SCALING)
1329                 tcp_flags |= L4_KWQ_CONNECT_REQ1_SEG_SCALING;
1330
1331         l4kwqe1->tcp_flags = tcp_flags;
1332
1333         return dev->submit_kwqes(dev, wqes, num_wqes);
1334 }
1335
1336 static int cnic_cm_close_req(struct cnic_sock *csk)
1337 {
1338         struct cnic_dev *dev = csk->dev;
1339         struct l4_kwq_close_req *l4kwqe;
1340         struct kwqe *wqes[1];
1341
1342         l4kwqe = (struct l4_kwq_close_req *) &csk->kwqe2;
1343         memset(l4kwqe, 0, sizeof(*l4kwqe));
1344         wqes[0] = (struct kwqe *) l4kwqe;
1345
1346         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_CLOSE;
1347         l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_CLOSE_REQ_LAYER_CODE_SHIFT;
1348         l4kwqe->cid = csk->cid;
1349
1350         return dev->submit_kwqes(dev, wqes, 1);
1351 }
1352
1353 static int cnic_cm_abort_req(struct cnic_sock *csk)
1354 {
1355         struct cnic_dev *dev = csk->dev;
1356         struct l4_kwq_reset_req *l4kwqe;
1357         struct kwqe *wqes[1];
1358
1359         l4kwqe = (struct l4_kwq_reset_req *) &csk->kwqe2;
1360         memset(l4kwqe, 0, sizeof(*l4kwqe));
1361         wqes[0] = (struct kwqe *) l4kwqe;
1362
1363         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_RESET;
1364         l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_RESET_REQ_LAYER_CODE_SHIFT;
1365         l4kwqe->cid = csk->cid;
1366
1367         return dev->submit_kwqes(dev, wqes, 1);
1368 }
1369
1370 static int cnic_cm_create(struct cnic_dev *dev, int ulp_type, u32 cid,
1371                           u32 l5_cid, struct cnic_sock **csk, void *context)
1372 {
1373         struct cnic_local *cp = dev->cnic_priv;
1374         struct cnic_sock *csk1;
1375
1376         if (l5_cid >= MAX_CM_SK_TBL_SZ)
1377                 return -EINVAL;
1378
1379         csk1 = &cp->csk_tbl[l5_cid];
1380         if (atomic_read(&csk1->ref_count))
1381                 return -EAGAIN;
1382
1383         if (test_and_set_bit(SK_F_INUSE, &csk1->flags))
1384                 return -EBUSY;
1385
1386         csk1->dev = dev;
1387         csk1->cid = cid;
1388         csk1->l5_cid = l5_cid;
1389         csk1->ulp_type = ulp_type;
1390         csk1->context = context;
1391
1392         csk1->ka_timeout = DEF_KA_TIMEOUT;
1393         csk1->ka_interval = DEF_KA_INTERVAL;
1394         csk1->ka_max_probe_count = DEF_KA_MAX_PROBE_COUNT;
1395         csk1->tos = DEF_TOS;
1396         csk1->ttl = DEF_TTL;
1397         csk1->snd_seq_scale = DEF_SND_SEQ_SCALE;
1398         csk1->rcv_buf = DEF_RCV_BUF;
1399         csk1->snd_buf = DEF_SND_BUF;
1400         csk1->seed = DEF_SEED;
1401
1402         *csk = csk1;
1403         return 0;
1404 }
1405
1406 static void cnic_cm_cleanup(struct cnic_sock *csk)
1407 {
1408         if (csk->src_port) {
1409                 struct cnic_dev *dev = csk->dev;
1410                 struct cnic_local *cp = dev->cnic_priv;
1411
1412                 cnic_free_id(&cp->csk_port_tbl, csk->src_port);
1413                 csk->src_port = 0;
1414         }
1415 }
1416
1417 static void cnic_close_conn(struct cnic_sock *csk)
1418 {
1419         if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags)) {
1420                 cnic_cm_upload_pg(csk);
1421                 clear_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1422         }
1423         cnic_cm_cleanup(csk);
1424 }
1425
1426 static int cnic_cm_destroy(struct cnic_sock *csk)
1427 {
1428         if (!cnic_in_use(csk))
1429                 return -EINVAL;
1430
1431         csk_hold(csk);
1432         clear_bit(SK_F_INUSE, &csk->flags);
1433         smp_mb__after_clear_bit();
1434         while (atomic_read(&csk->ref_count) != 1)
1435                 msleep(1);
1436         cnic_cm_cleanup(csk);
1437
1438         csk->flags = 0;
1439         csk_put(csk);
1440         return 0;
1441 }
1442
1443 static inline u16 cnic_get_vlan(struct net_device *dev,
1444                                 struct net_device **vlan_dev)
1445 {
1446         if (dev->priv_flags & IFF_802_1Q_VLAN) {
1447                 *vlan_dev = vlan_dev_real_dev(dev);
1448                 return vlan_dev_vlan_id(dev);
1449         }
1450         *vlan_dev = dev;
1451         return 0;
1452 }
1453
1454 static int cnic_get_v4_route(struct sockaddr_in *dst_addr,
1455                              struct dst_entry **dst)
1456 {
1457         struct flowi fl;
1458         int err;
1459         struct rtable *rt;
1460
1461         memset(&fl, 0, sizeof(fl));
1462         fl.nl_u.ip4_u.daddr = dst_addr->sin_addr.s_addr;
1463
1464         err = ip_route_output_key(&init_net, &rt, &fl);
1465         if (!err)
1466                 *dst = &rt->u.dst;
1467         return err;
1468 }
1469
1470 static int cnic_get_v6_route(struct sockaddr_in6 *dst_addr,
1471                              struct dst_entry **dst)
1472 {
1473 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1474         struct flowi fl;
1475
1476         memset(&fl, 0, sizeof(fl));
1477         ipv6_addr_copy(&fl.fl6_dst, &dst_addr->sin6_addr);
1478         if (ipv6_addr_type(&fl.fl6_dst) & IPV6_ADDR_LINKLOCAL)
1479                 fl.oif = dst_addr->sin6_scope_id;
1480
1481         *dst = ip6_route_output(&init_net, NULL, &fl);
1482         if (*dst)
1483                 return 0;
1484 #endif
1485
1486         return -ENETUNREACH;
1487 }
1488
1489 static struct cnic_dev *cnic_cm_select_dev(struct sockaddr_in *dst_addr,
1490                                            int ulp_type)
1491 {
1492         struct cnic_dev *dev = NULL;
1493         struct dst_entry *dst;
1494         struct net_device *netdev = NULL;
1495         int err = -ENETUNREACH;
1496
1497         if (dst_addr->sin_family == AF_INET)
1498                 err = cnic_get_v4_route(dst_addr, &dst);
1499         else if (dst_addr->sin_family == AF_INET6) {
1500                 struct sockaddr_in6 *dst_addr6 =
1501                         (struct sockaddr_in6 *) dst_addr;
1502
1503                 err = cnic_get_v6_route(dst_addr6, &dst);
1504         } else
1505                 return NULL;
1506
1507         if (err)
1508                 return NULL;
1509
1510         if (!dst->dev)
1511                 goto done;
1512
1513         cnic_get_vlan(dst->dev, &netdev);
1514
1515         dev = cnic_from_netdev(netdev);
1516
1517 done:
1518         dst_release(dst);
1519         if (dev)
1520                 cnic_put(dev);
1521         return dev;
1522 }
1523
1524 static int cnic_resolve_addr(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1525 {
1526         struct cnic_dev *dev = csk->dev;
1527         struct cnic_local *cp = dev->cnic_priv;
1528
1529         return cnic_send_nlmsg(cp, ISCSI_KEVENT_PATH_REQ, csk);
1530 }
1531
1532 static int cnic_get_route(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1533 {
1534         struct cnic_dev *dev = csk->dev;
1535         struct cnic_local *cp = dev->cnic_priv;
1536         int is_v6, err, rc = -ENETUNREACH;
1537         struct dst_entry *dst;
1538         struct net_device *realdev;
1539         u32 local_port;
1540
1541         if (saddr->local.v6.sin6_family == AF_INET6 &&
1542             saddr->remote.v6.sin6_family == AF_INET6)
1543                 is_v6 = 1;
1544         else if (saddr->local.v4.sin_family == AF_INET &&
1545                  saddr->remote.v4.sin_family == AF_INET)
1546                 is_v6 = 0;
1547         else
1548                 return -EINVAL;
1549
1550         clear_bit(SK_F_IPV6, &csk->flags);
1551
1552         if (is_v6) {
1553 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1554                 set_bit(SK_F_IPV6, &csk->flags);
1555                 err = cnic_get_v6_route(&saddr->remote.v6, &dst);
1556                 if (err)
1557                         return err;
1558
1559                 if (!dst || dst->error || !dst->dev)
1560                         goto err_out;
1561
1562                 memcpy(&csk->dst_ip[0], &saddr->remote.v6.sin6_addr,
1563                        sizeof(struct in6_addr));
1564                 csk->dst_port = saddr->remote.v6.sin6_port;
1565                 local_port = saddr->local.v6.sin6_port;
1566 #else
1567                 return rc;
1568 #endif
1569
1570         } else {
1571                 err = cnic_get_v4_route(&saddr->remote.v4, &dst);
1572                 if (err)
1573                         return err;
1574
1575                 if (!dst || dst->error || !dst->dev)
1576                         goto err_out;
1577
1578                 csk->dst_ip[0] = saddr->remote.v4.sin_addr.s_addr;
1579                 csk->dst_port = saddr->remote.v4.sin_port;
1580                 local_port = saddr->local.v4.sin_port;
1581         }
1582
1583         csk->vlan_id = cnic_get_vlan(dst->dev, &realdev);
1584         if (realdev != dev->netdev)
1585                 goto err_out;
1586
1587         if (local_port >= CNIC_LOCAL_PORT_MIN &&
1588             local_port < CNIC_LOCAL_PORT_MAX) {
1589                 if (cnic_alloc_id(&cp->csk_port_tbl, local_port))
1590                         local_port = 0;
1591         } else
1592                 local_port = 0;
1593
1594         if (!local_port) {
1595                 local_port = cnic_alloc_new_id(&cp->csk_port_tbl);
1596                 if (local_port == -1) {
1597                         rc = -ENOMEM;
1598                         goto err_out;
1599                 }
1600         }
1601         csk->src_port = local_port;
1602
1603         csk->mtu = dst_mtu(dst);
1604         rc = 0;
1605
1606 err_out:
1607         dst_release(dst);
1608         return rc;
1609 }
1610
1611 static void cnic_init_csk_state(struct cnic_sock *csk)
1612 {
1613         csk->state = 0;
1614         clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1615         clear_bit(SK_F_CLOSING, &csk->flags);
1616 }
1617
1618 static int cnic_cm_connect(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1619 {
1620         int err = 0;
1621
1622         if (!cnic_in_use(csk))
1623                 return -EINVAL;
1624
1625         if (test_and_set_bit(SK_F_CONNECT_START, &csk->flags))
1626                 return -EINVAL;
1627
1628         cnic_init_csk_state(csk);
1629
1630         err = cnic_get_route(csk, saddr);
1631         if (err)
1632                 goto err_out;
1633
1634         err = cnic_resolve_addr(csk, saddr);
1635         if (!err)
1636                 return 0;
1637
1638 err_out:
1639         clear_bit(SK_F_CONNECT_START, &csk->flags);
1640         return err;
1641 }
1642
1643 static int cnic_cm_abort(struct cnic_sock *csk)
1644 {
1645         struct cnic_local *cp = csk->dev->cnic_priv;
1646         u32 opcode;
1647
1648         if (!cnic_in_use(csk))
1649                 return -EINVAL;
1650
1651         if (cnic_abort_prep(csk))
1652                 return cnic_cm_abort_req(csk);
1653
1654         /* Getting here means that we haven't started connect, or
1655          * connect was not successful.
1656          */
1657
1658         csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
1659         if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1660                 opcode = csk->state;
1661         else
1662                 opcode = L5CM_RAMROD_CMD_ID_TERMINATE_OFFLOAD;
1663         cp->close_conn(csk, opcode);
1664
1665         return 0;
1666 }
1667
1668 static int cnic_cm_close(struct cnic_sock *csk)
1669 {
1670         if (!cnic_in_use(csk))
1671                 return -EINVAL;
1672
1673         if (cnic_close_prep(csk)) {
1674                 csk->state = L4_KCQE_OPCODE_VALUE_CLOSE_COMP;
1675                 return cnic_cm_close_req(csk);
1676         }
1677         return 0;
1678 }
1679
1680 static void cnic_cm_upcall(struct cnic_local *cp, struct cnic_sock *csk,
1681                            u8 opcode)
1682 {
1683         struct cnic_ulp_ops *ulp_ops;
1684         int ulp_type = csk->ulp_type;
1685
1686         rcu_read_lock();
1687         ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
1688         if (ulp_ops) {
1689                 if (opcode == L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE)
1690                         ulp_ops->cm_connect_complete(csk);
1691                 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)
1692                         ulp_ops->cm_close_complete(csk);
1693                 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED)
1694                         ulp_ops->cm_remote_abort(csk);
1695                 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_COMP)
1696                         ulp_ops->cm_abort_complete(csk);
1697                 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED)
1698                         ulp_ops->cm_remote_close(csk);
1699         }
1700         rcu_read_unlock();
1701 }
1702
1703 static int cnic_cm_set_pg(struct cnic_sock *csk)
1704 {
1705         if (cnic_offld_prep(csk)) {
1706                 if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1707                         cnic_cm_update_pg(csk);
1708                 else
1709                         cnic_cm_offload_pg(csk);
1710         }
1711         return 0;
1712 }
1713
1714 static void cnic_cm_process_offld_pg(struct cnic_dev *dev, struct l4_kcq *kcqe)
1715 {
1716         struct cnic_local *cp = dev->cnic_priv;
1717         u32 l5_cid = kcqe->pg_host_opaque;
1718         u8 opcode = kcqe->op_code;
1719         struct cnic_sock *csk = &cp->csk_tbl[l5_cid];
1720
1721         csk_hold(csk);
1722         if (!cnic_in_use(csk))
1723                 goto done;
1724
1725         if (opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1726                 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1727                 goto done;
1728         }
1729         csk->pg_cid = kcqe->pg_cid;
1730         set_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1731         cnic_cm_conn_req(csk);
1732
1733 done:
1734         csk_put(csk);
1735 }
1736
1737 static void cnic_cm_process_kcqe(struct cnic_dev *dev, struct kcqe *kcqe)
1738 {
1739         struct cnic_local *cp = dev->cnic_priv;
1740         struct l4_kcq *l4kcqe = (struct l4_kcq *) kcqe;
1741         u8 opcode = l4kcqe->op_code;
1742         u32 l5_cid;
1743         struct cnic_sock *csk;
1744
1745         if (opcode == L4_KCQE_OPCODE_VALUE_OFFLOAD_PG ||
1746             opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1747                 cnic_cm_process_offld_pg(dev, l4kcqe);
1748                 return;
1749         }
1750
1751         l5_cid = l4kcqe->conn_id;
1752         if (opcode & 0x80)
1753                 l5_cid = l4kcqe->cid;
1754         if (l5_cid >= MAX_CM_SK_TBL_SZ)
1755                 return;
1756
1757         csk = &cp->csk_tbl[l5_cid];
1758         csk_hold(csk);
1759
1760         if (!cnic_in_use(csk)) {
1761                 csk_put(csk);
1762                 return;
1763         }
1764
1765         switch (opcode) {
1766         case L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE:
1767                 if (l4kcqe->status == 0)
1768                         set_bit(SK_F_OFFLD_COMPLETE, &csk->flags);
1769
1770                 smp_mb__before_clear_bit();
1771                 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1772                 cnic_cm_upcall(cp, csk, opcode);
1773                 break;
1774
1775         case L4_KCQE_OPCODE_VALUE_RESET_RECEIVED:
1776                 if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags))
1777                         csk->state = opcode;
1778                 /* fall through */
1779         case L4_KCQE_OPCODE_VALUE_CLOSE_COMP:
1780         case L4_KCQE_OPCODE_VALUE_RESET_COMP:
1781                 cp->close_conn(csk, opcode);
1782                 break;
1783
1784         case L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED:
1785                 cnic_cm_upcall(cp, csk, opcode);
1786                 break;
1787         }
1788         csk_put(csk);
1789 }
1790
1791 static void cnic_cm_indicate_kcqe(void *data, struct kcqe *kcqe[], u32 num)
1792 {
1793         struct cnic_dev *dev = data;
1794         int i;
1795
1796         for (i = 0; i < num; i++)
1797                 cnic_cm_process_kcqe(dev, kcqe[i]);
1798 }
1799
1800 static struct cnic_ulp_ops cm_ulp_ops = {
1801         .indicate_kcqes         = cnic_cm_indicate_kcqe,
1802 };
1803
1804 static void cnic_cm_free_mem(struct cnic_dev *dev)
1805 {
1806         struct cnic_local *cp = dev->cnic_priv;
1807
1808         kfree(cp->csk_tbl);
1809         cp->csk_tbl = NULL;
1810         cnic_free_id_tbl(&cp->csk_port_tbl);
1811 }
1812
1813 static int cnic_cm_alloc_mem(struct cnic_dev *dev)
1814 {
1815         struct cnic_local *cp = dev->cnic_priv;
1816
1817         cp->csk_tbl = kzalloc(sizeof(struct cnic_sock) * MAX_CM_SK_TBL_SZ,
1818                               GFP_KERNEL);
1819         if (!cp->csk_tbl)
1820                 return -ENOMEM;
1821
1822         if (cnic_init_id_tbl(&cp->csk_port_tbl, CNIC_LOCAL_PORT_RANGE,
1823                              CNIC_LOCAL_PORT_MIN)) {
1824                 cnic_cm_free_mem(dev);
1825                 return -ENOMEM;
1826         }
1827         return 0;
1828 }
1829
1830 static int cnic_ready_to_close(struct cnic_sock *csk, u32 opcode)
1831 {
1832         if ((opcode == csk->state) ||
1833             (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED &&
1834              csk->state == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)) {
1835                 if (!test_and_set_bit(SK_F_CLOSING, &csk->flags))
1836                         return 1;
1837         }
1838         return 0;
1839 }
1840
1841 static void cnic_close_bnx2_conn(struct cnic_sock *csk, u32 opcode)
1842 {
1843         struct cnic_dev *dev = csk->dev;
1844         struct cnic_local *cp = dev->cnic_priv;
1845
1846         clear_bit(SK_F_CONNECT_START, &csk->flags);
1847         if (cnic_ready_to_close(csk, opcode)) {
1848                 cnic_close_conn(csk);
1849                 cnic_cm_upcall(cp, csk, opcode);
1850         }
1851 }
1852
1853 static void cnic_cm_stop_bnx2_hw(struct cnic_dev *dev)
1854 {
1855 }
1856
1857 static int cnic_cm_init_bnx2_hw(struct cnic_dev *dev)
1858 {
1859         u32 seed;
1860
1861         get_random_bytes(&seed, 4);
1862         cnic_ctx_wr(dev, 45, 0, seed);
1863         return 0;
1864 }
1865
1866 static int cnic_cm_open(struct cnic_dev *dev)
1867 {
1868         struct cnic_local *cp = dev->cnic_priv;
1869         int err;
1870
1871         err = cnic_cm_alloc_mem(dev);
1872         if (err)
1873                 return err;
1874
1875         err = cp->start_cm(dev);
1876
1877         if (err)
1878                 goto err_out;
1879
1880         dev->cm_create = cnic_cm_create;
1881         dev->cm_destroy = cnic_cm_destroy;
1882         dev->cm_connect = cnic_cm_connect;
1883         dev->cm_abort = cnic_cm_abort;
1884         dev->cm_close = cnic_cm_close;
1885         dev->cm_select_dev = cnic_cm_select_dev;
1886
1887         cp->ulp_handle[CNIC_ULP_L4] = dev;
1888         rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], &cm_ulp_ops);
1889         return 0;
1890
1891 err_out:
1892         cnic_cm_free_mem(dev);
1893         return err;
1894 }
1895
1896 static int cnic_cm_shutdown(struct cnic_dev *dev)
1897 {
1898         struct cnic_local *cp = dev->cnic_priv;
1899         int i;
1900
1901         cp->stop_cm(dev);
1902
1903         if (!cp->csk_tbl)
1904                 return 0;
1905
1906         for (i = 0; i < MAX_CM_SK_TBL_SZ; i++) {
1907                 struct cnic_sock *csk = &cp->csk_tbl[i];
1908
1909                 clear_bit(SK_F_INUSE, &csk->flags);
1910                 cnic_cm_cleanup(csk);
1911         }
1912         cnic_cm_free_mem(dev);
1913
1914         return 0;
1915 }
1916
1917 static void cnic_init_context(struct cnic_dev *dev, u32 cid)
1918 {
1919         struct cnic_local *cp = dev->cnic_priv;
1920         u32 cid_addr;
1921         int i;
1922
1923         if (CHIP_NUM(cp) == CHIP_NUM_5709)
1924                 return;
1925
1926         cid_addr = GET_CID_ADDR(cid);
1927
1928         for (i = 0; i < CTX_SIZE; i += 4)
1929                 cnic_ctx_wr(dev, cid_addr, i, 0);
1930 }
1931
1932 static int cnic_setup_5709_context(struct cnic_dev *dev, int valid)
1933 {
1934         struct cnic_local *cp = dev->cnic_priv;
1935         int ret = 0, i;
1936         u32 valid_bit = valid ? BNX2_CTX_HOST_PAGE_TBL_DATA0_VALID : 0;
1937
1938         if (CHIP_NUM(cp) != CHIP_NUM_5709)
1939                 return 0;
1940
1941         for (i = 0; i < cp->ctx_blks; i++) {
1942                 int j;
1943                 u32 idx = cp->ctx_arr[i].cid / cp->cids_per_blk;
1944                 u32 val;
1945
1946                 memset(cp->ctx_arr[i].ctx, 0, BCM_PAGE_SIZE);
1947
1948                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA0,
1949                         (cp->ctx_arr[i].mapping & 0xffffffff) | valid_bit);
1950                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA1,
1951                         (u64) cp->ctx_arr[i].mapping >> 32);
1952                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL, idx |
1953                         BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ);
1954                 for (j = 0; j < 10; j++) {
1955
1956                         val = CNIC_RD(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL);
1957                         if (!(val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ))
1958                                 break;
1959                         udelay(5);
1960                 }
1961                 if (val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ) {
1962                         ret = -EBUSY;
1963                         break;
1964                 }
1965         }
1966         return ret;
1967 }
1968
1969 static void cnic_free_irq(struct cnic_dev *dev)
1970 {
1971         struct cnic_local *cp = dev->cnic_priv;
1972         struct cnic_eth_dev *ethdev = cp->ethdev;
1973
1974         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
1975                 cp->disable_int_sync(dev);
1976                 tasklet_disable(&cp->cnic_irq_task);
1977                 free_irq(ethdev->irq_arr[0].vector, dev);
1978         }
1979 }
1980
1981 static int cnic_init_bnx2_irq(struct cnic_dev *dev)
1982 {
1983         struct cnic_local *cp = dev->cnic_priv;
1984         struct cnic_eth_dev *ethdev = cp->ethdev;
1985
1986         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
1987                 int err, i = 0;
1988                 int sblk_num = cp->status_blk_num;
1989                 u32 base = ((sblk_num - 1) * BNX2_HC_SB_CONFIG_SIZE) +
1990                            BNX2_HC_SB_CONFIG_1;
1991
1992                 CNIC_WR(dev, base, BNX2_HC_SB_CONFIG_1_ONE_SHOT);
1993
1994                 CNIC_WR(dev, base + BNX2_HC_COMP_PROD_TRIP_OFF, (2 << 16) | 8);
1995                 CNIC_WR(dev, base + BNX2_HC_COM_TICKS_OFF, (64 << 16) | 220);
1996                 CNIC_WR(dev, base + BNX2_HC_CMD_TICKS_OFF, (64 << 16) | 220);
1997
1998                 cp->bnx2_status_blk = cp->status_blk;
1999                 cp->last_status_idx = cp->bnx2_status_blk->status_idx;
2000                 tasklet_init(&cp->cnic_irq_task, &cnic_service_bnx2_msix,
2001                              (unsigned long) dev);
2002                 err = request_irq(ethdev->irq_arr[0].vector, cnic_irq, 0,
2003                                   "cnic", dev);
2004                 if (err) {
2005                         tasklet_disable(&cp->cnic_irq_task);
2006                         return err;
2007                 }
2008                 while (cp->bnx2_status_blk->status_completion_producer_index &&
2009                        i < 10) {
2010                         CNIC_WR(dev, BNX2_HC_COALESCE_NOW,
2011                                 1 << (11 + sblk_num));
2012                         udelay(10);
2013                         i++;
2014                         barrier();
2015                 }
2016                 if (cp->bnx2_status_blk->status_completion_producer_index) {
2017                         cnic_free_irq(dev);
2018                         goto failed;
2019                 }
2020
2021         } else {
2022                 struct status_block *sblk = cp->status_blk;
2023                 u32 hc_cmd = CNIC_RD(dev, BNX2_HC_COMMAND);
2024                 int i = 0;
2025
2026                 while (sblk->status_completion_producer_index && i < 10) {
2027                         CNIC_WR(dev, BNX2_HC_COMMAND,
2028                                 hc_cmd | BNX2_HC_COMMAND_COAL_NOW_WO_INT);
2029                         udelay(10);
2030                         i++;
2031                         barrier();
2032                 }
2033                 if (sblk->status_completion_producer_index)
2034                         goto failed;
2035
2036         }
2037         return 0;
2038
2039 failed:
2040         printk(KERN_ERR PFX "%s: " "KCQ index not resetting to 0.\n",
2041                dev->netdev->name);
2042         return -EBUSY;
2043 }
2044
2045 static void cnic_enable_bnx2_int(struct cnic_dev *dev)
2046 {
2047         struct cnic_local *cp = dev->cnic_priv;
2048         struct cnic_eth_dev *ethdev = cp->ethdev;
2049
2050         if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2051                 return;
2052
2053         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2054                 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
2055 }
2056
2057 static void cnic_disable_bnx2_int_sync(struct cnic_dev *dev)
2058 {
2059         struct cnic_local *cp = dev->cnic_priv;
2060         struct cnic_eth_dev *ethdev = cp->ethdev;
2061
2062         if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2063                 return;
2064
2065         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2066                 BNX2_PCICFG_INT_ACK_CMD_MASK_INT);
2067         CNIC_RD(dev, BNX2_PCICFG_INT_ACK_CMD);
2068         synchronize_irq(ethdev->irq_arr[0].vector);
2069 }
2070
2071 static void cnic_init_bnx2_tx_ring(struct cnic_dev *dev)
2072 {
2073         struct cnic_local *cp = dev->cnic_priv;
2074         struct cnic_eth_dev *ethdev = cp->ethdev;
2075         u32 cid_addr, tx_cid, sb_id;
2076         u32 val, offset0, offset1, offset2, offset3;
2077         int i;
2078         struct tx_bd *txbd;
2079         dma_addr_t buf_map;
2080         struct status_block *s_blk = cp->status_blk;
2081
2082         sb_id = cp->status_blk_num;
2083         tx_cid = 20;
2084         cnic_init_context(dev, tx_cid);
2085         cnic_init_context(dev, tx_cid + 1);
2086         cp->tx_cons_ptr = &s_blk->status_tx_quick_consumer_index2;
2087         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2088                 struct status_block_msix *sblk = cp->status_blk;
2089
2090                 tx_cid = TX_TSS_CID + sb_id - 1;
2091                 cnic_init_context(dev, tx_cid);
2092                 CNIC_WR(dev, BNX2_TSCH_TSS_CFG, (sb_id << 24) |
2093                         (TX_TSS_CID << 7));
2094                 cp->tx_cons_ptr = &sblk->status_tx_quick_consumer_index;
2095         }
2096         cp->tx_cons = *cp->tx_cons_ptr;
2097
2098         cid_addr = GET_CID_ADDR(tx_cid);
2099         if (CHIP_NUM(cp) == CHIP_NUM_5709) {
2100                 u32 cid_addr2 = GET_CID_ADDR(tx_cid + 4) + 0x40;
2101
2102                 for (i = 0; i < PHY_CTX_SIZE; i += 4)
2103                         cnic_ctx_wr(dev, cid_addr2, i, 0);
2104
2105                 offset0 = BNX2_L2CTX_TYPE_XI;
2106                 offset1 = BNX2_L2CTX_CMD_TYPE_XI;
2107                 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI_XI;
2108                 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO_XI;
2109         } else {
2110                 offset0 = BNX2_L2CTX_TYPE;
2111                 offset1 = BNX2_L2CTX_CMD_TYPE;
2112                 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI;
2113                 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO;
2114         }
2115         val = BNX2_L2CTX_TYPE_TYPE_L2 | BNX2_L2CTX_TYPE_SIZE_L2;
2116         cnic_ctx_wr(dev, cid_addr, offset0, val);
2117
2118         val = BNX2_L2CTX_CMD_TYPE_TYPE_L2 | (8 << 16);
2119         cnic_ctx_wr(dev, cid_addr, offset1, val);
2120
2121         txbd = (struct tx_bd *) cp->l2_ring;
2122
2123         buf_map = cp->l2_buf_map;
2124         for (i = 0; i < MAX_TX_DESC_CNT; i++, txbd++) {
2125                 txbd->tx_bd_haddr_hi = (u64) buf_map >> 32;
2126                 txbd->tx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2127         }
2128         val = (u64) cp->l2_ring_map >> 32;
2129         cnic_ctx_wr(dev, cid_addr, offset2, val);
2130         txbd->tx_bd_haddr_hi = val;
2131
2132         val = (u64) cp->l2_ring_map & 0xffffffff;
2133         cnic_ctx_wr(dev, cid_addr, offset3, val);
2134         txbd->tx_bd_haddr_lo = val;
2135 }
2136
2137 static void cnic_init_bnx2_rx_ring(struct cnic_dev *dev)
2138 {
2139         struct cnic_local *cp = dev->cnic_priv;
2140         struct cnic_eth_dev *ethdev = cp->ethdev;
2141         u32 cid_addr, sb_id, val, coal_reg, coal_val;
2142         int i;
2143         struct rx_bd *rxbd;
2144         struct status_block *s_blk = cp->status_blk;
2145
2146         sb_id = cp->status_blk_num;
2147         cnic_init_context(dev, 2);
2148         cp->rx_cons_ptr = &s_blk->status_rx_quick_consumer_index2;
2149         coal_reg = BNX2_HC_COMMAND;
2150         coal_val = CNIC_RD(dev, coal_reg);
2151         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2152                 struct status_block_msix *sblk = cp->status_blk;
2153
2154                 cp->rx_cons_ptr = &sblk->status_rx_quick_consumer_index;
2155                 coal_reg = BNX2_HC_COALESCE_NOW;
2156                 coal_val = 1 << (11 + sb_id);
2157         }
2158         i = 0;
2159         while (!(*cp->rx_cons_ptr != 0) && i < 10) {
2160                 CNIC_WR(dev, coal_reg, coal_val);
2161                 udelay(10);
2162                 i++;
2163                 barrier();
2164         }
2165         cp->rx_cons = *cp->rx_cons_ptr;
2166
2167         cid_addr = GET_CID_ADDR(2);
2168         val = BNX2_L2CTX_CTX_TYPE_CTX_BD_CHN_TYPE_VALUE |
2169               BNX2_L2CTX_CTX_TYPE_SIZE_L2 | (0x02 << 8);
2170         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_CTX_TYPE, val);
2171
2172         if (sb_id == 0)
2173                 val = 2 << BNX2_L2CTX_STATUSB_NUM_SHIFT;
2174         else
2175                 val = BNX2_L2CTX_STATUSB_NUM(sb_id);
2176         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_HOST_BDIDX, val);
2177
2178         rxbd = (struct rx_bd *) (cp->l2_ring + BCM_PAGE_SIZE);
2179         for (i = 0; i < MAX_RX_DESC_CNT; i++, rxbd++) {
2180                 dma_addr_t buf_map;
2181                 int n = (i % cp->l2_rx_ring_size) + 1;
2182
2183                 buf_map = cp->l2_buf_map + (n * cp->l2_single_buf_size);
2184                 rxbd->rx_bd_len = cp->l2_single_buf_size;
2185                 rxbd->rx_bd_flags = RX_BD_FLAGS_START | RX_BD_FLAGS_END;
2186                 rxbd->rx_bd_haddr_hi = (u64) buf_map >> 32;
2187                 rxbd->rx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2188         }
2189         val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) >> 32;
2190         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_HI, val);
2191         rxbd->rx_bd_haddr_hi = val;
2192
2193         val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) & 0xffffffff;
2194         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_LO, val);
2195         rxbd->rx_bd_haddr_lo = val;
2196
2197         val = cnic_reg_rd_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD);
2198         cnic_reg_wr_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD, val | (1 << 2));
2199 }
2200
2201 static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *dev)
2202 {
2203         struct kwqe *wqes[1], l2kwqe;
2204
2205         memset(&l2kwqe, 0, sizeof(l2kwqe));
2206         wqes[0] = &l2kwqe;
2207         l2kwqe.kwqe_op_flag = (L2_LAYER_CODE << KWQE_FLAGS_LAYER_SHIFT) |
2208                               (L2_KWQE_OPCODE_VALUE_FLUSH <<
2209                                KWQE_OPCODE_SHIFT) | 2;
2210         dev->submit_kwqes(dev, wqes, 1);
2211 }
2212
2213 static void cnic_set_bnx2_mac(struct cnic_dev *dev)
2214 {
2215         struct cnic_local *cp = dev->cnic_priv;
2216         u32 val;
2217
2218         val = cp->func << 2;
2219
2220         cp->shmem_base = cnic_reg_rd_ind(dev, BNX2_SHM_HDR_ADDR_0 + val);
2221
2222         val = cnic_reg_rd_ind(dev, cp->shmem_base +
2223                               BNX2_PORT_HW_CFG_ISCSI_MAC_UPPER);
2224         dev->mac_addr[0] = (u8) (val >> 8);
2225         dev->mac_addr[1] = (u8) val;
2226
2227         CNIC_WR(dev, BNX2_EMAC_MAC_MATCH4, val);
2228
2229         val = cnic_reg_rd_ind(dev, cp->shmem_base +
2230                               BNX2_PORT_HW_CFG_ISCSI_MAC_LOWER);
2231         dev->mac_addr[2] = (u8) (val >> 24);
2232         dev->mac_addr[3] = (u8) (val >> 16);
2233         dev->mac_addr[4] = (u8) (val >> 8);
2234         dev->mac_addr[5] = (u8) val;
2235
2236         CNIC_WR(dev, BNX2_EMAC_MAC_MATCH5, val);
2237
2238         val = 4 | BNX2_RPM_SORT_USER2_BC_EN;
2239         if (CHIP_NUM(cp) != CHIP_NUM_5709)
2240                 val |= BNX2_RPM_SORT_USER2_PROM_VLAN;
2241
2242         CNIC_WR(dev, BNX2_RPM_SORT_USER2, 0x0);
2243         CNIC_WR(dev, BNX2_RPM_SORT_USER2, val);
2244         CNIC_WR(dev, BNX2_RPM_SORT_USER2, val | BNX2_RPM_SORT_USER2_ENA);
2245 }
2246
2247 static int cnic_start_bnx2_hw(struct cnic_dev *dev)
2248 {
2249         struct cnic_local *cp = dev->cnic_priv;
2250         struct cnic_eth_dev *ethdev = cp->ethdev;
2251         struct status_block *sblk = cp->status_blk;
2252         u32 val;
2253         int err;
2254
2255         cnic_set_bnx2_mac(dev);
2256
2257         val = CNIC_RD(dev, BNX2_MQ_CONFIG);
2258         val &= ~BNX2_MQ_CONFIG_KNL_BYP_BLK_SIZE;
2259         if (BCM_PAGE_BITS > 12)
2260                 val |= (12 - 8)  << 4;
2261         else
2262                 val |= (BCM_PAGE_BITS - 8)  << 4;
2263
2264         CNIC_WR(dev, BNX2_MQ_CONFIG, val);
2265
2266         CNIC_WR(dev, BNX2_HC_COMP_PROD_TRIP, (2 << 16) | 8);
2267         CNIC_WR(dev, BNX2_HC_COM_TICKS, (64 << 16) | 220);
2268         CNIC_WR(dev, BNX2_HC_CMD_TICKS, (64 << 16) | 220);
2269
2270         err = cnic_setup_5709_context(dev, 1);
2271         if (err)
2272                 return err;
2273
2274         cnic_init_context(dev, KWQ_CID);
2275         cnic_init_context(dev, KCQ_CID);
2276
2277         cp->kwq_cid_addr = GET_CID_ADDR(KWQ_CID);
2278         cp->kwq_io_addr = MB_GET_CID_ADDR(KWQ_CID) + L5_KRNLQ_HOST_QIDX;
2279
2280         cp->max_kwq_idx = MAX_KWQ_IDX;
2281         cp->kwq_prod_idx = 0;
2282         cp->kwq_con_idx = 0;
2283         cp->cnic_local_flags |= CNIC_LCL_FL_KWQ_INIT;
2284
2285         if (CHIP_NUM(cp) == CHIP_NUM_5706 || CHIP_NUM(cp) == CHIP_NUM_5708)
2286                 cp->kwq_con_idx_ptr = &sblk->status_rx_quick_consumer_index15;
2287         else
2288                 cp->kwq_con_idx_ptr = &sblk->status_cmd_consumer_index;
2289
2290         /* Initialize the kernel work queue context. */
2291         val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2292               (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2293         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_TYPE, val);
2294
2295         val = (BCM_PAGE_SIZE / sizeof(struct kwqe) - 1) << 16;
2296         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2297
2298         val = ((BCM_PAGE_SIZE / sizeof(struct kwqe)) << 16) | KWQ_PAGE_CNT;
2299         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2300
2301         val = (u32) ((u64) cp->kwq_info.pgtbl_map >> 32);
2302         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2303
2304         val = (u32) cp->kwq_info.pgtbl_map;
2305         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2306
2307         cp->kcq_cid_addr = GET_CID_ADDR(KCQ_CID);
2308         cp->kcq_io_addr = MB_GET_CID_ADDR(KCQ_CID) + L5_KRNLQ_HOST_QIDX;
2309
2310         cp->kcq_prod_idx = 0;
2311
2312         /* Initialize the kernel complete queue context. */
2313         val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2314               (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2315         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_TYPE, val);
2316
2317         val = (BCM_PAGE_SIZE / sizeof(struct kcqe) - 1) << 16;
2318         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2319
2320         val = ((BCM_PAGE_SIZE / sizeof(struct kcqe)) << 16) | KCQ_PAGE_CNT;
2321         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2322
2323         val = (u32) ((u64) cp->kcq_info.pgtbl_map >> 32);
2324         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2325
2326         val = (u32) cp->kcq_info.pgtbl_map;
2327         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2328
2329         cp->int_num = 0;
2330         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2331                 u32 sb_id = cp->status_blk_num;
2332                 u32 sb = BNX2_L2CTX_STATUSB_NUM(sb_id);
2333
2334                 cp->int_num = sb_id << BNX2_PCICFG_INT_ACK_CMD_INT_NUM_SHIFT;
2335                 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2336                 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2337         }
2338
2339         /* Enable Commnad Scheduler notification when we write to the
2340          * host producer index of the kernel contexts. */
2341         CNIC_WR(dev, BNX2_MQ_KNL_CMD_MASK1, 2);
2342
2343         /* Enable Command Scheduler notification when we write to either
2344          * the Send Queue or Receive Queue producer indexes of the kernel
2345          * bypass contexts. */
2346         CNIC_WR(dev, BNX2_MQ_KNL_BYP_CMD_MASK1, 7);
2347         CNIC_WR(dev, BNX2_MQ_KNL_BYP_WRITE_MASK1, 7);
2348
2349         /* Notify COM when the driver post an application buffer. */
2350         CNIC_WR(dev, BNX2_MQ_KNL_RX_V2P_MASK2, 0x2000);
2351
2352         /* Set the CP and COM doorbells.  These two processors polls the
2353          * doorbell for a non zero value before running.  This must be done
2354          * after setting up the kernel queue contexts. */
2355         cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 1);
2356         cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 1);
2357
2358         cnic_init_bnx2_tx_ring(dev);
2359         cnic_init_bnx2_rx_ring(dev);
2360
2361         err = cnic_init_bnx2_irq(dev);
2362         if (err) {
2363                 printk(KERN_ERR PFX "%s: cnic_init_irq failed\n",
2364                        dev->netdev->name);
2365                 cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2366                 cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2367                 return err;
2368         }
2369
2370         return 0;
2371 }
2372
2373 static int cnic_start_hw(struct cnic_dev *dev)
2374 {
2375         struct cnic_local *cp = dev->cnic_priv;
2376         struct cnic_eth_dev *ethdev = cp->ethdev;
2377         int err;
2378
2379         if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
2380                 return -EALREADY;
2381
2382         err = ethdev->drv_register_cnic(dev->netdev, cp->cnic_ops, dev);
2383         if (err) {
2384                 printk(KERN_ERR PFX "%s: register_cnic failed\n",
2385                        dev->netdev->name);
2386                 goto err2;
2387         }
2388
2389         dev->regview = ethdev->io_base;
2390         cp->chip_id = ethdev->chip_id;
2391         pci_dev_get(dev->pcidev);
2392         cp->func = PCI_FUNC(dev->pcidev->devfn);
2393         cp->status_blk = ethdev->irq_arr[0].status_blk;
2394         cp->status_blk_num = ethdev->irq_arr[0].status_blk_num;
2395
2396         err = cp->alloc_resc(dev);
2397         if (err) {
2398                 printk(KERN_ERR PFX "%s: allocate resource failure\n",
2399                        dev->netdev->name);
2400                 goto err1;
2401         }
2402
2403         err = cp->start_hw(dev);
2404         if (err)
2405                 goto err1;
2406
2407         err = cnic_cm_open(dev);
2408         if (err)
2409                 goto err1;
2410
2411         set_bit(CNIC_F_CNIC_UP, &dev->flags);
2412
2413         cp->enable_int(dev);
2414
2415         return 0;
2416
2417 err1:
2418         ethdev->drv_unregister_cnic(dev->netdev);
2419         cp->free_resc(dev);
2420         pci_dev_put(dev->pcidev);
2421 err2:
2422         return err;
2423 }
2424
2425 static void cnic_stop_bnx2_hw(struct cnic_dev *dev)
2426 {
2427         struct cnic_local *cp = dev->cnic_priv;
2428         struct cnic_eth_dev *ethdev = cp->ethdev;
2429
2430         cnic_disable_bnx2_int_sync(dev);
2431
2432         cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2433         cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2434
2435         cnic_init_context(dev, KWQ_CID);
2436         cnic_init_context(dev, KCQ_CID);
2437
2438         cnic_setup_5709_context(dev, 0);
2439         cnic_free_irq(dev);
2440
2441         ethdev->drv_unregister_cnic(dev->netdev);
2442
2443         cnic_free_resc(dev);
2444 }
2445
2446 static void cnic_stop_hw(struct cnic_dev *dev)
2447 {
2448         if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2449                 struct cnic_local *cp = dev->cnic_priv;
2450
2451                 clear_bit(CNIC_F_CNIC_UP, &dev->flags);
2452                 rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], NULL);
2453                 synchronize_rcu();
2454                 cnic_cm_shutdown(dev);
2455                 cp->stop_hw(dev);
2456                 pci_dev_put(dev->pcidev);
2457         }
2458 }
2459
2460 static void cnic_free_dev(struct cnic_dev *dev)
2461 {
2462         int i = 0;
2463
2464         while ((atomic_read(&dev->ref_count) != 0) && i < 10) {
2465                 msleep(100);
2466                 i++;
2467         }
2468         if (atomic_read(&dev->ref_count) != 0)
2469                 printk(KERN_ERR PFX "%s: Failed waiting for ref count to go"
2470                                     " to zero.\n", dev->netdev->name);
2471
2472         printk(KERN_INFO PFX "Removed CNIC device: %s\n", dev->netdev->name);
2473         dev_put(dev->netdev);
2474         kfree(dev);
2475 }
2476
2477 static struct cnic_dev *cnic_alloc_dev(struct net_device *dev,
2478                                        struct pci_dev *pdev)
2479 {
2480         struct cnic_dev *cdev;
2481         struct cnic_local *cp;
2482         int alloc_size;
2483
2484         alloc_size = sizeof(struct cnic_dev) + sizeof(struct cnic_local);
2485
2486         cdev = kzalloc(alloc_size , GFP_KERNEL);
2487         if (cdev == NULL) {
2488                 printk(KERN_ERR PFX "%s: allocate dev struct failure\n",
2489                        dev->name);
2490                 return NULL;
2491         }
2492
2493         cdev->netdev = dev;
2494         cdev->cnic_priv = (char *)cdev + sizeof(struct cnic_dev);
2495         cdev->register_device = cnic_register_device;
2496         cdev->unregister_device = cnic_unregister_device;
2497         cdev->iscsi_nl_msg_recv = cnic_iscsi_nl_msg_recv;
2498
2499         cp = cdev->cnic_priv;
2500         cp->dev = cdev;
2501         cp->uio_dev = -1;
2502         cp->l2_single_buf_size = 0x400;
2503         cp->l2_rx_ring_size = 3;
2504
2505         spin_lock_init(&cp->cnic_ulp_lock);
2506
2507         printk(KERN_INFO PFX "Added CNIC device: %s\n", dev->name);
2508
2509         return cdev;
2510 }
2511
2512 static struct cnic_dev *init_bnx2_cnic(struct net_device *dev)
2513 {
2514         struct pci_dev *pdev;
2515         struct cnic_dev *cdev;
2516         struct cnic_local *cp;
2517         struct cnic_eth_dev *ethdev = NULL;
2518         struct cnic_eth_dev *(*probe)(void *) = NULL;
2519
2520         probe = __symbol_get("bnx2_cnic_probe");
2521         if (probe) {
2522                 ethdev = (*probe)(dev);
2523                 symbol_put_addr(probe);
2524         }
2525         if (!ethdev)
2526                 return NULL;
2527
2528         pdev = ethdev->pdev;
2529         if (!pdev)
2530                 return NULL;
2531
2532         dev_hold(dev);
2533         pci_dev_get(pdev);
2534         if (pdev->device == PCI_DEVICE_ID_NX2_5709 ||
2535             pdev->device == PCI_DEVICE_ID_NX2_5709S) {
2536                 u8 rev;
2537
2538                 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
2539                 if (rev < 0x10) {
2540                         pci_dev_put(pdev);
2541                         goto cnic_err;
2542                 }
2543         }
2544         pci_dev_put(pdev);
2545
2546         cdev = cnic_alloc_dev(dev, pdev);
2547         if (cdev == NULL)
2548                 goto cnic_err;
2549
2550         set_bit(CNIC_F_BNX2_CLASS, &cdev->flags);
2551         cdev->submit_kwqes = cnic_submit_bnx2_kwqes;
2552
2553         cp = cdev->cnic_priv;
2554         cp->ethdev = ethdev;
2555         cdev->pcidev = pdev;
2556
2557         cp->cnic_ops = &cnic_bnx2_ops;
2558         cp->start_hw = cnic_start_bnx2_hw;
2559         cp->stop_hw = cnic_stop_bnx2_hw;
2560         cp->setup_pgtbl = cnic_setup_page_tbl;
2561         cp->alloc_resc = cnic_alloc_bnx2_resc;
2562         cp->free_resc = cnic_free_resc;
2563         cp->start_cm = cnic_cm_init_bnx2_hw;
2564         cp->stop_cm = cnic_cm_stop_bnx2_hw;
2565         cp->enable_int = cnic_enable_bnx2_int;
2566         cp->disable_int_sync = cnic_disable_bnx2_int_sync;
2567         cp->close_conn = cnic_close_bnx2_conn;
2568         cp->next_idx = cnic_bnx2_next_idx;
2569         cp->hw_idx = cnic_bnx2_hw_idx;
2570         return cdev;
2571
2572 cnic_err:
2573         dev_put(dev);
2574         return NULL;
2575 }
2576
2577 static struct cnic_dev *is_cnic_dev(struct net_device *dev)
2578 {
2579         struct ethtool_drvinfo drvinfo;
2580         struct cnic_dev *cdev = NULL;
2581
2582         if (dev->ethtool_ops && dev->ethtool_ops->get_drvinfo) {
2583                 memset(&drvinfo, 0, sizeof(drvinfo));
2584                 dev->ethtool_ops->get_drvinfo(dev, &drvinfo);
2585
2586                 if (!strcmp(drvinfo.driver, "bnx2"))
2587                         cdev = init_bnx2_cnic(dev);
2588                 if (cdev) {
2589                         write_lock(&cnic_dev_lock);
2590                         list_add(&cdev->list, &cnic_dev_list);
2591                         write_unlock(&cnic_dev_lock);
2592                 }
2593         }
2594         return cdev;
2595 }
2596
2597 /**
2598  * netdev event handler
2599  */
2600 static int cnic_netdev_event(struct notifier_block *this, unsigned long event,
2601                                                          void *ptr)
2602 {
2603         struct net_device *netdev = ptr;
2604         struct cnic_dev *dev;
2605         int if_type;
2606         int new_dev = 0;
2607
2608         dev = cnic_from_netdev(netdev);
2609
2610         if (!dev && (event == NETDEV_REGISTER || event == NETDEV_UP)) {
2611                 /* Check for the hot-plug device */
2612                 dev = is_cnic_dev(netdev);
2613                 if (dev) {
2614                         new_dev = 1;
2615                         cnic_hold(dev);
2616                 }
2617         }
2618         if (dev) {
2619                 struct cnic_local *cp = dev->cnic_priv;
2620
2621                 if (new_dev)
2622                         cnic_ulp_init(dev);
2623                 else if (event == NETDEV_UNREGISTER)
2624                         cnic_ulp_exit(dev);
2625                 else if (event == NETDEV_UP) {
2626                         mutex_lock(&cnic_lock);
2627                         if (!cnic_start_hw(dev))
2628                                 cnic_ulp_start(dev);
2629                         mutex_unlock(&cnic_lock);
2630                 }
2631
2632                 rcu_read_lock();
2633                 for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
2634                         struct cnic_ulp_ops *ulp_ops;
2635                         void *ctx;
2636
2637                         ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
2638                         if (!ulp_ops || !ulp_ops->indicate_netevent)
2639                                 continue;
2640
2641                         ctx = cp->ulp_handle[if_type];
2642
2643                         ulp_ops->indicate_netevent(ctx, event);
2644                 }
2645                 rcu_read_unlock();
2646
2647                 if (event == NETDEV_GOING_DOWN) {
2648                         mutex_lock(&cnic_lock);
2649                         cnic_ulp_stop(dev);
2650                         cnic_stop_hw(dev);
2651                         mutex_unlock(&cnic_lock);
2652                 } else if (event == NETDEV_UNREGISTER) {
2653                         write_lock(&cnic_dev_lock);
2654                         list_del_init(&dev->list);
2655                         write_unlock(&cnic_dev_lock);
2656
2657                         cnic_put(dev);
2658                         cnic_free_dev(dev);
2659                         goto done;
2660                 }
2661                 cnic_put(dev);
2662         }
2663 done:
2664         return NOTIFY_DONE;
2665 }
2666
2667 static struct notifier_block cnic_netdev_notifier = {
2668         .notifier_call = cnic_netdev_event
2669 };
2670
2671 static void cnic_release(void)
2672 {
2673         struct cnic_dev *dev;
2674
2675         while (!list_empty(&cnic_dev_list)) {
2676                 dev = list_entry(cnic_dev_list.next, struct cnic_dev, list);
2677                 if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2678                         cnic_ulp_stop(dev);
2679                         cnic_stop_hw(dev);
2680                 }
2681
2682                 cnic_ulp_exit(dev);
2683                 list_del_init(&dev->list);
2684                 cnic_free_dev(dev);
2685         }
2686 }
2687
2688 static int __init cnic_init(void)
2689 {
2690         int rc = 0;
2691
2692         printk(KERN_INFO "%s", version);
2693
2694         rc = register_netdevice_notifier(&cnic_netdev_notifier);
2695         if (rc) {
2696                 cnic_release();
2697                 return rc;
2698         }
2699
2700         return 0;
2701 }
2702
2703 static void __exit cnic_exit(void)
2704 {
2705         unregister_netdevice_notifier(&cnic_netdev_notifier);
2706         cnic_release();
2707         return;
2708 }
2709
2710 module_init(cnic_init);
2711 module_exit(cnic_exit);