2d529c9fa1ad43b4388134305440f2ae6b27affc
[linux-2.6.git] / drivers / scsi / bnx2i / bnx2i_iscsi.c
1 /*
2  * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver.
3  *
4  * Copyright (c) 2006 - 2011 Broadcom Corporation
5  * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
6  * Copyright (c) 2007, 2008 Mike Christie
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation.
11  *
12  * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
13  * Maintained by: Eddie Wai (eddie.wai@broadcom.com)
14  */
15
16 #include <linux/slab.h>
17 #include <scsi/scsi_tcq.h>
18 #include <scsi/libiscsi.h>
19 #include "bnx2i.h"
20
21 struct scsi_transport_template *bnx2i_scsi_xport_template;
22 struct iscsi_transport bnx2i_iscsi_transport;
23 static struct scsi_host_template bnx2i_host_template;
24
25 /*
26  * Global endpoint resource info
27  */
28 static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */
29
30 DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
31
32 static int bnx2i_adapter_ready(struct bnx2i_hba *hba)
33 {
34         int retval = 0;
35
36         if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
37             test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
38             test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
39                 retval = -EPERM;
40         return retval;
41 }
42
43 /**
44  * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks
45  * @cmd:                iscsi cmd struct pointer
46  * @buf_off:            absolute buffer offset
47  * @start_bd_off:       u32 pointer to return the offset within the BD
48  *                      indicated by 'start_bd_idx' on which 'buf_off' falls
49  * @start_bd_idx:       index of the BD on which 'buf_off' falls
50  *
51  * identifies & marks various bd info for scsi command's imm data,
52  * unsolicited data and the first solicited data seq.
53  */
54 static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off,
55                                        u32 *start_bd_off, u32 *start_bd_idx)
56 {
57         struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl;
58         u32 cur_offset = 0;
59         u32 cur_bd_idx = 0;
60
61         if (buf_off) {
62                 while (buf_off >= (cur_offset + bd_tbl->buffer_length)) {
63                         cur_offset += bd_tbl->buffer_length;
64                         cur_bd_idx++;
65                         bd_tbl++;
66                 }
67         }
68
69         *start_bd_off = buf_off - cur_offset;
70         *start_bd_idx = cur_bd_idx;
71 }
72
73 /**
74  * bnx2i_setup_write_cmd_bd_info - sets up BD various information
75  * @task:       transport layer's cmd struct pointer
76  *
77  * identifies & marks various bd info for scsi command's immediate data,
78  * unsolicited data and first solicited data seq which includes BD start
79  * index & BD buf off. his function takes into account iscsi parameter such
80  * as immediate data and unsolicited data is support on this connection.
81  */
82 static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task)
83 {
84         struct bnx2i_cmd *cmd = task->dd_data;
85         u32 start_bd_offset;
86         u32 start_bd_idx;
87         u32 buffer_offset = 0;
88         u32 cmd_len = cmd->req.total_data_transfer_length;
89
90         /* if ImmediateData is turned off & IntialR2T is turned on,
91          * there will be no immediate or unsolicited data, just return.
92          */
93         if (!iscsi_task_has_unsol_data(task) && !task->imm_count)
94                 return;
95
96         /* Immediate data */
97         buffer_offset += task->imm_count;
98         if (task->imm_count == cmd_len)
99                 return;
100
101         if (iscsi_task_has_unsol_data(task)) {
102                 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
103                                            &start_bd_offset, &start_bd_idx);
104                 cmd->req.ud_buffer_offset = start_bd_offset;
105                 cmd->req.ud_start_bd_index = start_bd_idx;
106                 buffer_offset += task->unsol_r2t.data_length;
107         }
108
109         if (buffer_offset != cmd_len) {
110                 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
111                                            &start_bd_offset, &start_bd_idx);
112                 if ((start_bd_offset > task->conn->session->first_burst) ||
113                     (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) {
114                         int i = 0;
115
116                         iscsi_conn_printk(KERN_ALERT, task->conn,
117                                           "bnx2i- error, buf offset 0x%x "
118                                           "bd_valid %d use_sg %d\n",
119                                           buffer_offset, cmd->io_tbl.bd_valid,
120                                           scsi_sg_count(cmd->scsi_cmd));
121                         for (i = 0; i < cmd->io_tbl.bd_valid; i++)
122                                 iscsi_conn_printk(KERN_ALERT, task->conn,
123                                                   "bnx2i err, bd[%d]: len %x\n",
124                                                   i, cmd->io_tbl.bd_tbl[i].\
125                                                   buffer_length);
126                 }
127                 cmd->req.sd_buffer_offset = start_bd_offset;
128                 cmd->req.sd_start_bd_index = start_bd_idx;
129         }
130 }
131
132
133
134 /**
135  * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
136  * @hba:        adapter instance
137  * @cmd:        iscsi cmd struct pointer
138  *
139  * map SG list
140  */
141 static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
142 {
143         struct scsi_cmnd *sc = cmd->scsi_cmd;
144         struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
145         struct scatterlist *sg;
146         int byte_count = 0;
147         int bd_count = 0;
148         int sg_count;
149         int sg_len;
150         u64 addr;
151         int i;
152
153         BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD);
154
155         sg_count = scsi_dma_map(sc);
156
157         scsi_for_each_sg(sc, sg, sg_count, i) {
158                 sg_len = sg_dma_len(sg);
159                 addr = (u64) sg_dma_address(sg);
160                 bd[bd_count].buffer_addr_lo = addr & 0xffffffff;
161                 bd[bd_count].buffer_addr_hi = addr >> 32;
162                 bd[bd_count].buffer_length = sg_len;
163                 bd[bd_count].flags = 0;
164                 if (bd_count == 0)
165                         bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;
166
167                 byte_count += sg_len;
168                 bd_count++;
169         }
170
171         if (bd_count)
172                 bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
173
174         BUG_ON(byte_count != scsi_bufflen(sc));
175         return bd_count;
176 }
177
178 /**
179  * bnx2i_iscsi_map_sg_list - maps SG list
180  * @cmd:        iscsi cmd struct pointer
181  *
182  * creates BD list table for the command
183  */
184 static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)
185 {
186         int bd_count;
187
188         bd_count  = bnx2i_map_scsi_sg(cmd->conn->hba, cmd);
189         if (!bd_count) {
190                 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
191
192                 bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;
193                 bd[0].buffer_length = bd[0].flags = 0;
194         }
195         cmd->io_tbl.bd_valid = bd_count;
196 }
197
198
199 /**
200  * bnx2i_iscsi_unmap_sg_list - unmaps SG list
201  * @cmd:        iscsi cmd struct pointer
202  *
203  * unmap IO buffers and invalidate the BD table
204  */
205 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)
206 {
207         struct scsi_cmnd *sc = cmd->scsi_cmd;
208
209         if (cmd->io_tbl.bd_valid && sc) {
210                 scsi_dma_unmap(sc);
211                 cmd->io_tbl.bd_valid = 0;
212         }
213 }
214
215 static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)
216 {
217         memset(&cmd->req, 0x00, sizeof(cmd->req));
218         cmd->req.op_code = 0xFF;
219         cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma;
220         cmd->req.bd_list_addr_hi =
221                 (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32);
222
223 }
224
225
226 /**
227  * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'
228  * @hba:        pointer to adapter instance
229  * @conn:       pointer to iscsi connection
230  * @iscsi_cid:  iscsi context ID, range 0 - (MAX_CONN - 1)
231  *
232  * update iscsi cid table entry with connection pointer. This enables
233  *      driver to quickly get hold of connection structure pointer in
234  *      completion/interrupt thread using iscsi context ID
235  */
236 static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,
237                                         struct bnx2i_conn *bnx2i_conn,
238                                         u32 iscsi_cid)
239 {
240         if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {
241                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
242                                  "conn bind - entry #%d not free\n", iscsi_cid);
243                 return -EBUSY;
244         }
245
246         hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn;
247         return 0;
248 }
249
250
251 /**
252  * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr
253  * @hba:        pointer to adapter instance
254  * @iscsi_cid:  iscsi context ID, range 0 - (MAX_CONN - 1)
255  */
256 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
257                                           u16 iscsi_cid)
258 {
259         if (!hba->cid_que.conn_cid_tbl) {
260                 printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n");
261                 return NULL;
262
263         } else if (iscsi_cid >= hba->max_active_conns) {
264                 printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid);
265                 return NULL;
266         }
267         return hba->cid_que.conn_cid_tbl[iscsi_cid];
268 }
269
270
271 /**
272  * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
273  * @hba:        pointer to adapter instance
274  */
275 static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)
276 {
277         int idx;
278
279         if (!hba->cid_que.cid_free_cnt)
280                 return -1;
281
282         idx = hba->cid_que.cid_q_cons_idx;
283         hba->cid_que.cid_q_cons_idx++;
284         if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx)
285                 hba->cid_que.cid_q_cons_idx = 0;
286
287         hba->cid_que.cid_free_cnt--;
288         return hba->cid_que.cid_que[idx];
289 }
290
291
292 /**
293  * bnx2i_free_iscsi_cid - returns tcp port to free list
294  * @hba:                pointer to adapter instance
295  * @iscsi_cid:          iscsi context ID to free
296  */
297 static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)
298 {
299         int idx;
300
301         if (iscsi_cid == (u16) -1)
302                 return;
303
304         hba->cid_que.cid_free_cnt++;
305
306         idx = hba->cid_que.cid_q_prod_idx;
307         hba->cid_que.cid_que[idx] = iscsi_cid;
308         hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL;
309         hba->cid_que.cid_q_prod_idx++;
310         if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx)
311                 hba->cid_que.cid_q_prod_idx = 0;
312 }
313
314
315 /**
316  * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
317  * @hba:        pointer to adapter instance
318  *
319  * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
320  *      and initialize table attributes
321  */
322 static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)
323 {
324         int mem_size;
325         int i;
326
327         mem_size = hba->max_active_conns * sizeof(u32);
328         mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
329
330         hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL);
331         if (!hba->cid_que.cid_que_base)
332                 return -ENOMEM;
333
334         mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *);
335         mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
336         hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL);
337         if (!hba->cid_que.conn_cid_tbl) {
338                 kfree(hba->cid_que.cid_que_base);
339                 hba->cid_que.cid_que_base = NULL;
340                 return -ENOMEM;
341         }
342
343         hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base;
344         hba->cid_que.cid_q_prod_idx = 0;
345         hba->cid_que.cid_q_cons_idx = 0;
346         hba->cid_que.cid_q_max_idx = hba->max_active_conns;
347         hba->cid_que.cid_free_cnt = hba->max_active_conns;
348
349         for (i = 0; i < hba->max_active_conns; i++) {
350                 hba->cid_que.cid_que[i] = i;
351                 hba->cid_que.conn_cid_tbl[i] = NULL;
352         }
353         return 0;
354 }
355
356
357 /**
358  * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
359  * @hba:        pointer to adapter instance
360  */
361 static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)
362 {
363         kfree(hba->cid_que.cid_que_base);
364         hba->cid_que.cid_que_base = NULL;
365
366         kfree(hba->cid_que.conn_cid_tbl);
367         hba->cid_que.conn_cid_tbl = NULL;
368 }
369
370
371 /**
372  * bnx2i_alloc_ep - allocates ep structure from global pool
373  * @hba:        pointer to adapter instance
374  *
375  * routine allocates a free endpoint structure from global pool and
376  *      a tcp port to be used for this connection.  Global resource lock,
377  *      'bnx2i_resc_lock' is held while accessing shared global data structures
378  */
379 static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)
380 {
381         struct iscsi_endpoint *ep;
382         struct bnx2i_endpoint *bnx2i_ep;
383         u32 ec_div;
384
385         ep = iscsi_create_endpoint(sizeof(*bnx2i_ep));
386         if (!ep) {
387                 printk(KERN_ERR "bnx2i: Could not allocate ep\n");
388                 return NULL;
389         }
390
391         bnx2i_ep = ep->dd_data;
392         bnx2i_ep->cls_ep = ep;
393         INIT_LIST_HEAD(&bnx2i_ep->link);
394         bnx2i_ep->state = EP_STATE_IDLE;
395         bnx2i_ep->ep_iscsi_cid = (u16) -1;
396         bnx2i_ep->hba = hba;
397         bnx2i_ep->hba_age = hba->age;
398
399         ec_div = event_coal_div;
400         while (ec_div >>= 1)
401                 bnx2i_ep->ec_shift += 1;
402
403         hba->ofld_conns_active++;
404         init_waitqueue_head(&bnx2i_ep->ofld_wait);
405         return ep;
406 }
407
408
409 /**
410  * bnx2i_free_ep - free endpoint
411  * @ep:         pointer to iscsi endpoint structure
412  */
413 static void bnx2i_free_ep(struct iscsi_endpoint *ep)
414 {
415         struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
416         unsigned long flags;
417
418         spin_lock_irqsave(&bnx2i_resc_lock, flags);
419         bnx2i_ep->state = EP_STATE_IDLE;
420         bnx2i_ep->hba->ofld_conns_active--;
421
422         if (bnx2i_ep->ep_iscsi_cid != (u16) -1)
423                 bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);
424
425         if (bnx2i_ep->conn) {
426                 bnx2i_ep->conn->ep = NULL;
427                 bnx2i_ep->conn = NULL;
428         }
429
430         bnx2i_ep->hba = NULL;
431         spin_unlock_irqrestore(&bnx2i_resc_lock, flags);
432         iscsi_destroy_endpoint(ep);
433 }
434
435
436 /**
437  * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
438  * @hba:        adapter instance pointer
439  * @session:    iscsi session pointer
440  * @cmd:        iscsi command structure
441  */
442 static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,
443                            struct bnx2i_cmd *cmd)
444 {
445         struct io_bdt *io = &cmd->io_tbl;
446         struct iscsi_bd *bd;
447
448         io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
449                                         ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),
450                                         &io->bd_tbl_dma, GFP_KERNEL);
451         if (!io->bd_tbl) {
452                 iscsi_session_printk(KERN_ERR, session, "Could not "
453                                      "allocate bdt.\n");
454                 return -ENOMEM;
455         }
456         io->bd_valid = 0;
457         return 0;
458 }
459
460 /**
461  * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
462  * @hba:        adapter instance pointer
463  * @session:    iscsi session pointer
464  * @cmd:        iscsi command structure
465  */
466 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
467                                    struct iscsi_session *session)
468 {
469         int i;
470
471         for (i = 0; i < session->cmds_max; i++) {
472                 struct iscsi_task *task = session->cmds[i];
473                 struct bnx2i_cmd *cmd = task->dd_data;
474
475                 if (cmd->io_tbl.bd_tbl)
476                         dma_free_coherent(&hba->pcidev->dev,
477                                           ISCSI_MAX_BDS_PER_CMD *
478                                           sizeof(struct iscsi_bd),
479                                           cmd->io_tbl.bd_tbl,
480                                           cmd->io_tbl.bd_tbl_dma);
481         }
482
483 }
484
485
486 /**
487  * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
488  * @hba:        adapter instance pointer
489  * @session:    iscsi session pointer
490  */
491 static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
492                                 struct iscsi_session *session)
493 {
494         int i;
495
496         for (i = 0; i < session->cmds_max; i++) {
497                 struct iscsi_task *task = session->cmds[i];
498                 struct bnx2i_cmd *cmd = task->dd_data;
499
500                 task->hdr = &cmd->hdr;
501                 task->hdr_max = sizeof(struct iscsi_hdr);
502
503                 if (bnx2i_alloc_bdt(hba, session, cmd))
504                         goto free_bdts;
505         }
506
507         return 0;
508
509 free_bdts:
510         bnx2i_destroy_cmd_pool(hba, session);
511         return -ENOMEM;
512 }
513
514
515 /**
516  * bnx2i_setup_mp_bdt - allocate BD table resources
517  * @hba:        pointer to adapter structure
518  *
519  * Allocate memory for dummy buffer and associated BD
520  * table to be used by middle path (MP) requests
521  */
522 static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
523 {
524         int rc = 0;
525         struct iscsi_bd *mp_bdt;
526         u64 addr;
527
528         hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
529                                             &hba->mp_bd_dma, GFP_KERNEL);
530         if (!hba->mp_bd_tbl) {
531                 printk(KERN_ERR "unable to allocate Middle Path BDT\n");
532                 rc = -1;
533                 goto out;
534         }
535
536         hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
537                                                &hba->dummy_buf_dma, GFP_KERNEL);
538         if (!hba->dummy_buffer) {
539                 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
540                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
541                                   hba->mp_bd_tbl, hba->mp_bd_dma);
542                 hba->mp_bd_tbl = NULL;
543                 rc = -1;
544                 goto out;
545         }
546
547         mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
548         addr = (unsigned long) hba->dummy_buf_dma;
549         mp_bdt->buffer_addr_lo = addr & 0xffffffff;
550         mp_bdt->buffer_addr_hi = addr >> 32;
551         mp_bdt->buffer_length = PAGE_SIZE;
552         mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
553                         ISCSI_BD_FIRST_IN_BD_CHAIN;
554 out:
555         return rc;
556 }
557
558
559 /**
560  * bnx2i_free_mp_bdt - releases ITT back to free pool
561  * @hba:        pointer to adapter instance
562  *
563  * free MP dummy buffer and associated BD table
564  */
565 static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
566 {
567         if (hba->mp_bd_tbl) {
568                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
569                                   hba->mp_bd_tbl, hba->mp_bd_dma);
570                 hba->mp_bd_tbl = NULL;
571         }
572         if (hba->dummy_buffer) {
573                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
574                                   hba->dummy_buffer, hba->dummy_buf_dma);
575                 hba->dummy_buffer = NULL;
576         }
577                 return;
578 }
579
580 /**
581  * bnx2i_drop_session - notifies iscsid of connection error.
582  * @hba:        adapter instance pointer
583  * @session:    iscsi session pointer
584  *
585  * This notifies iscsid that there is a error, so it can initiate
586  * recovery.
587  *
588  * This relies on caller using the iscsi class iterator so the object
589  * is refcounted and does not disapper from under us.
590  */
591 void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
592 {
593         iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
594 }
595
596 /**
597  * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
598  * @hba:        pointer to adapter instance
599  * @ep:         pointer to endpoint (transport indentifier) structure
600  *
601  * EP destroy queue manager
602  */
603 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
604                                      struct bnx2i_endpoint *ep)
605 {
606         write_lock_bh(&hba->ep_rdwr_lock);
607         list_add_tail(&ep->link, &hba->ep_destroy_list);
608         write_unlock_bh(&hba->ep_rdwr_lock);
609         return 0;
610 }
611
612 /**
613  * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
614  *
615  * @hba:                pointer to adapter instance
616  * @ep:                 pointer to endpoint (transport indentifier) structure
617  *
618  * EP destroy queue manager
619  */
620 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
621                                      struct bnx2i_endpoint *ep)
622 {
623         write_lock_bh(&hba->ep_rdwr_lock);
624         list_del_init(&ep->link);
625         write_unlock_bh(&hba->ep_rdwr_lock);
626
627         return 0;
628 }
629
630 /**
631  * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
632  * @hba:        pointer to adapter instance
633  * @ep:         pointer to endpoint (transport indentifier) structure
634  *
635  * pending conn offload completion queue manager
636  */
637 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
638                                   struct bnx2i_endpoint *ep)
639 {
640         write_lock_bh(&hba->ep_rdwr_lock);
641         list_add_tail(&ep->link, &hba->ep_ofld_list);
642         write_unlock_bh(&hba->ep_rdwr_lock);
643         return 0;
644 }
645
646 /**
647  * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
648  * @hba:                pointer to adapter instance
649  * @ep:                 pointer to endpoint (transport indentifier) structure
650  *
651  * pending conn offload completion queue manager
652  */
653 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
654                                   struct bnx2i_endpoint *ep)
655 {
656         write_lock_bh(&hba->ep_rdwr_lock);
657         list_del_init(&ep->link);
658         write_unlock_bh(&hba->ep_rdwr_lock);
659         return 0;
660 }
661
662
663 /**
664  * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
665  *
666  * @hba:                pointer to adapter instance
667  * @iscsi_cid:          iscsi context ID to find
668  *
669  */
670 struct bnx2i_endpoint *
671 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
672 {
673         struct list_head *list;
674         struct list_head *tmp;
675         struct bnx2i_endpoint *ep;
676
677         read_lock_bh(&hba->ep_rdwr_lock);
678         list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
679                 ep = (struct bnx2i_endpoint *)list;
680
681                 if (ep->ep_iscsi_cid == iscsi_cid)
682                         break;
683                 ep = NULL;
684         }
685         read_unlock_bh(&hba->ep_rdwr_lock);
686
687         if (!ep)
688                 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
689         return ep;
690 }
691
692 /**
693  * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
694  * @hba:                pointer to adapter instance
695  * @iscsi_cid:          iscsi context ID to find
696  *
697  */
698 struct bnx2i_endpoint *
699 bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
700 {
701         struct list_head *list;
702         struct list_head *tmp;
703         struct bnx2i_endpoint *ep;
704
705         read_lock_bh(&hba->ep_rdwr_lock);
706         list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
707                 ep = (struct bnx2i_endpoint *)list;
708
709                 if (ep->ep_iscsi_cid == iscsi_cid)
710                         break;
711                 ep = NULL;
712         }
713         read_unlock_bh(&hba->ep_rdwr_lock);
714
715         if (!ep)
716                 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
717
718         return ep;
719 }
720
721 /**
722  * bnx2i_ep_active_list_add - add an entry to ep active list
723  * @hba:        pointer to adapter instance
724  * @ep:         pointer to endpoint (transport indentifier) structure
725  *
726  * current active conn queue manager
727  */
728 static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba,
729                                      struct bnx2i_endpoint *ep)
730 {
731         write_lock_bh(&hba->ep_rdwr_lock);
732         list_add_tail(&ep->link, &hba->ep_active_list);
733         write_unlock_bh(&hba->ep_rdwr_lock);
734 }
735
736
737 /**
738  * bnx2i_ep_active_list_del - deletes an entry to ep active list
739  * @hba:        pointer to adapter instance
740  * @ep:         pointer to endpoint (transport indentifier) structure
741  *
742  * current active conn queue manager
743  */
744 static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba,
745                                      struct bnx2i_endpoint *ep)
746 {
747         write_lock_bh(&hba->ep_rdwr_lock);
748         list_del_init(&ep->link);
749         write_unlock_bh(&hba->ep_rdwr_lock);
750 }
751
752
753 /**
754  * bnx2i_setup_host_queue_size - assigns shost->can_queue param
755  * @hba:        pointer to adapter instance
756  * @shost:      scsi host pointer
757  *
758  * Initializes 'can_queue' parameter based on how many outstanding commands
759  *      the device can handle. Each device 5708/5709/57710 has different
760  *      capabilities
761  */
762 static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
763                                         struct Scsi_Host *shost)
764 {
765         if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
766                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
767         else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
768                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
769         else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
770                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
771         else
772                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
773 }
774
775
776 /**
777  * bnx2i_alloc_hba - allocate and init adapter instance
778  * @cnic:       cnic device pointer
779  *
780  * allocate & initialize adapter structure and call other
781  *      support routines to do per adapter initialization
782  */
783 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
784 {
785         struct Scsi_Host *shost;
786         struct bnx2i_hba *hba;
787
788         shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
789         if (!shost)
790                 return NULL;
791         shost->dma_boundary = cnic->pcidev->dma_mask;
792         shost->transportt = bnx2i_scsi_xport_template;
793         shost->max_id = ISCSI_MAX_CONNS_PER_HBA;
794         shost->max_channel = 0;
795         shost->max_lun = 512;
796         shost->max_cmd_len = 16;
797
798         hba = iscsi_host_priv(shost);
799         hba->shost = shost;
800         hba->netdev = cnic->netdev;
801         /* Get PCI related information and update hba struct members */
802         hba->pcidev = cnic->pcidev;
803         pci_dev_get(hba->pcidev);
804         hba->pci_did = hba->pcidev->device;
805         hba->pci_vid = hba->pcidev->vendor;
806         hba->pci_sdid = hba->pcidev->subsystem_device;
807         hba->pci_svid = hba->pcidev->subsystem_vendor;
808         hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
809         hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
810
811         bnx2i_identify_device(hba);
812         bnx2i_setup_host_queue_size(hba, shost);
813
814         if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
815                 hba->regview = ioremap_nocache(hba->netdev->base_addr,
816                                                BNX2_MQ_CONFIG2);
817                 if (!hba->regview)
818                         goto ioreg_map_err;
819         } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
820                 hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096);
821                 if (!hba->regview)
822                         goto ioreg_map_err;
823         }
824
825         if (bnx2i_setup_mp_bdt(hba))
826                 goto mp_bdt_mem_err;
827
828         INIT_LIST_HEAD(&hba->ep_ofld_list);
829         INIT_LIST_HEAD(&hba->ep_active_list);
830         INIT_LIST_HEAD(&hba->ep_destroy_list);
831         rwlock_init(&hba->ep_rdwr_lock);
832
833         hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
834
835         /* different values for 5708/5709/57710 */
836         hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
837
838         if (bnx2i_setup_free_cid_que(hba))
839                 goto cid_que_err;
840
841         /* SQ/RQ/CQ size can be changed via sysfx interface */
842         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
843                 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
844                         hba->max_sqes = sq_size;
845                 else
846                         hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
847         } else {        /* 5706/5708/5709 */
848                 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
849                         hba->max_sqes = sq_size;
850                 else
851                         hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
852         }
853
854         hba->max_rqes = rq_size;
855         hba->max_cqes = hba->max_sqes + rq_size;
856         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
857                 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
858                         hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
859         } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
860                 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
861
862         hba->num_ccell = hba->max_sqes / 2;
863
864         spin_lock_init(&hba->lock);
865         mutex_init(&hba->net_dev_lock);
866         init_waitqueue_head(&hba->eh_wait);
867         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
868                 hba->hba_shutdown_tmo = 30 * HZ;
869                 hba->conn_teardown_tmo = 20 * HZ;
870                 hba->conn_ctx_destroy_tmo = 6 * HZ;
871         } else {        /* 5706/5708/5709 */
872                 hba->hba_shutdown_tmo = 20 * HZ;
873                 hba->conn_teardown_tmo = 10 * HZ;
874                 hba->conn_ctx_destroy_tmo = 2 * HZ;
875         }
876
877         if (iscsi_host_add(shost, &hba->pcidev->dev))
878                 goto free_dump_mem;
879         return hba;
880
881 free_dump_mem:
882         bnx2i_release_free_cid_que(hba);
883 cid_que_err:
884         bnx2i_free_mp_bdt(hba);
885 mp_bdt_mem_err:
886         if (hba->regview) {
887                 iounmap(hba->regview);
888                 hba->regview = NULL;
889         }
890 ioreg_map_err:
891         pci_dev_put(hba->pcidev);
892         scsi_host_put(shost);
893         return NULL;
894 }
895
896 /**
897  * bnx2i_free_hba- releases hba structure and resources held by the adapter
898  * @hba:        pointer to adapter instance
899  *
900  * free adapter structure and call various cleanup routines.
901  */
902 void bnx2i_free_hba(struct bnx2i_hba *hba)
903 {
904         struct Scsi_Host *shost = hba->shost;
905
906         iscsi_host_remove(shost);
907         INIT_LIST_HEAD(&hba->ep_ofld_list);
908         INIT_LIST_HEAD(&hba->ep_active_list);
909         INIT_LIST_HEAD(&hba->ep_destroy_list);
910         pci_dev_put(hba->pcidev);
911
912         if (hba->regview) {
913                 iounmap(hba->regview);
914                 hba->regview = NULL;
915         }
916         bnx2i_free_mp_bdt(hba);
917         bnx2i_release_free_cid_que(hba);
918         iscsi_host_free(shost);
919 }
920
921 /**
922  * bnx2i_conn_free_login_resources - free DMA resources used for login process
923  * @hba:                pointer to adapter instance
924  * @bnx2i_conn:         iscsi connection pointer
925  *
926  * Login related resources, mostly BDT & payload DMA memory is freed
927  */
928 static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
929                                             struct bnx2i_conn *bnx2i_conn)
930 {
931         if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
932                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
933                                   bnx2i_conn->gen_pdu.resp_bd_tbl,
934                                   bnx2i_conn->gen_pdu.resp_bd_dma);
935                 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
936         }
937
938         if (bnx2i_conn->gen_pdu.req_bd_tbl) {
939                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
940                                   bnx2i_conn->gen_pdu.req_bd_tbl,
941                                   bnx2i_conn->gen_pdu.req_bd_dma);
942                 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
943         }
944
945         if (bnx2i_conn->gen_pdu.resp_buf) {
946                 dma_free_coherent(&hba->pcidev->dev,
947                                   ISCSI_DEF_MAX_RECV_SEG_LEN,
948                                   bnx2i_conn->gen_pdu.resp_buf,
949                                   bnx2i_conn->gen_pdu.resp_dma_addr);
950                 bnx2i_conn->gen_pdu.resp_buf = NULL;
951         }
952
953         if (bnx2i_conn->gen_pdu.req_buf) {
954                 dma_free_coherent(&hba->pcidev->dev,
955                                   ISCSI_DEF_MAX_RECV_SEG_LEN,
956                                   bnx2i_conn->gen_pdu.req_buf,
957                                   bnx2i_conn->gen_pdu.req_dma_addr);
958                 bnx2i_conn->gen_pdu.req_buf = NULL;
959         }
960 }
961
962 /**
963  * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
964  * @hba:                pointer to adapter instance
965  * @bnx2i_conn:         iscsi connection pointer
966  *
967  * Mgmt task DNA resources are allocated in this routine.
968  */
969 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
970                                             struct bnx2i_conn *bnx2i_conn)
971 {
972         /* Allocate memory for login request/response buffers */
973         bnx2i_conn->gen_pdu.req_buf =
974                 dma_alloc_coherent(&hba->pcidev->dev,
975                                    ISCSI_DEF_MAX_RECV_SEG_LEN,
976                                    &bnx2i_conn->gen_pdu.req_dma_addr,
977                                    GFP_KERNEL);
978         if (bnx2i_conn->gen_pdu.req_buf == NULL)
979                 goto login_req_buf_failure;
980
981         bnx2i_conn->gen_pdu.req_buf_size = 0;
982         bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
983
984         bnx2i_conn->gen_pdu.resp_buf =
985                 dma_alloc_coherent(&hba->pcidev->dev,
986                                    ISCSI_DEF_MAX_RECV_SEG_LEN,
987                                    &bnx2i_conn->gen_pdu.resp_dma_addr,
988                                    GFP_KERNEL);
989         if (bnx2i_conn->gen_pdu.resp_buf == NULL)
990                 goto login_resp_buf_failure;
991
992         bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
993         bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
994
995         bnx2i_conn->gen_pdu.req_bd_tbl =
996                 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
997                                    &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
998         if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
999                 goto login_req_bd_tbl_failure;
1000
1001         bnx2i_conn->gen_pdu.resp_bd_tbl =
1002                 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
1003                                    &bnx2i_conn->gen_pdu.resp_bd_dma,
1004                                    GFP_KERNEL);
1005         if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
1006                 goto login_resp_bd_tbl_failure;
1007
1008         return 0;
1009
1010 login_resp_bd_tbl_failure:
1011         dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
1012                           bnx2i_conn->gen_pdu.req_bd_tbl,
1013                           bnx2i_conn->gen_pdu.req_bd_dma);
1014         bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
1015
1016 login_req_bd_tbl_failure:
1017         dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1018                           bnx2i_conn->gen_pdu.resp_buf,
1019                           bnx2i_conn->gen_pdu.resp_dma_addr);
1020         bnx2i_conn->gen_pdu.resp_buf = NULL;
1021 login_resp_buf_failure:
1022         dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1023                           bnx2i_conn->gen_pdu.req_buf,
1024                           bnx2i_conn->gen_pdu.req_dma_addr);
1025         bnx2i_conn->gen_pdu.req_buf = NULL;
1026 login_req_buf_failure:
1027         iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
1028                           "login resource alloc failed!!\n");
1029         return -ENOMEM;
1030
1031 }
1032
1033
1034 /**
1035  * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
1036  * @bnx2i_conn:         iscsi connection pointer
1037  *
1038  * Allocates buffers and BD tables before shipping requests to cnic
1039  *      for PDUs prepared by 'iscsid' daemon
1040  */
1041 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
1042 {
1043         struct iscsi_bd *bd_tbl;
1044
1045         bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
1046
1047         bd_tbl->buffer_addr_hi =
1048                 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
1049         bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
1050         bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
1051                                 bnx2i_conn->gen_pdu.req_buf;
1052         bd_tbl->reserved0 = 0;
1053         bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1054                         ISCSI_BD_FIRST_IN_BD_CHAIN;
1055
1056         bd_tbl = (struct iscsi_bd  *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1057         bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1058         bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1059         bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1060         bd_tbl->reserved0 = 0;
1061         bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1062                         ISCSI_BD_FIRST_IN_BD_CHAIN;
1063 }
1064
1065
1066 /**
1067  * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1068  * @task:       transport layer task pointer
1069  *
1070  * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1071  *      Nop-out and Logout requests flow through this path.
1072  */
1073 static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1074 {
1075         struct bnx2i_cmd *cmd = task->dd_data;
1076         struct bnx2i_conn *bnx2i_conn = cmd->conn;
1077         int rc = 0;
1078         char *buf;
1079         int data_len;
1080
1081         bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1082         switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1083         case ISCSI_OP_LOGIN:
1084                 bnx2i_send_iscsi_login(bnx2i_conn, task);
1085                 break;
1086         case ISCSI_OP_NOOP_OUT:
1087                 data_len = bnx2i_conn->gen_pdu.req_buf_size;
1088                 buf = bnx2i_conn->gen_pdu.req_buf;
1089                 if (data_len)
1090                         rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1091                                                      buf, data_len, 1);
1092                 else
1093                         rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1094                                                      NULL, 0, 1);
1095                 break;
1096         case ISCSI_OP_LOGOUT:
1097                 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1098                 break;
1099         case ISCSI_OP_SCSI_TMFUNC:
1100                 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1101                 break;
1102         case ISCSI_OP_TEXT:
1103                 rc = bnx2i_send_iscsi_text(bnx2i_conn, task);
1104                 break;
1105         default:
1106                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1107                                   "send_gen: unsupported op 0x%x\n",
1108                                   task->hdr->opcode);
1109         }
1110         return rc;
1111 }
1112
1113
1114 /**********************************************************************
1115  *              SCSI-ML Interface
1116  **********************************************************************/
1117
1118 /**
1119  * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1120  * @sc:         SCSI-ML command pointer
1121  * @cmd:        iscsi cmd pointer
1122  */
1123 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1124 {
1125         u32 dword;
1126         int lpcnt;
1127         u8 *srcp;
1128         u32 *dstp;
1129         u32 scsi_lun[2];
1130
1131         int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1132         cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1133         cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1134
1135         lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1136         srcp = (u8 *) sc->cmnd;
1137         dstp = (u32 *) cmd->req.cdb;
1138         while (lpcnt--) {
1139                 memcpy(&dword, (const void *) srcp, 4);
1140                 *dstp = cpu_to_be32(dword);
1141                 srcp += 4;
1142                 dstp++;
1143         }
1144         if (sc->cmd_len & 0x3) {
1145                 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1146                 *dstp = cpu_to_be32(dword);
1147         }
1148 }
1149
1150 static void bnx2i_cleanup_task(struct iscsi_task *task)
1151 {
1152         struct iscsi_conn *conn = task->conn;
1153         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1154         struct bnx2i_hba *hba = bnx2i_conn->hba;
1155
1156         /*
1157          * mgmt task or cmd was never sent to us to transmit.
1158          */
1159         if (!task->sc || task->state == ISCSI_TASK_PENDING)
1160                 return;
1161         /*
1162          * need to clean-up task context to claim dma buffers
1163          */
1164         if (task->state == ISCSI_TASK_ABRT_TMF) {
1165                 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1166
1167                 spin_unlock_bh(&conn->session->lock);
1168                 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1169                                 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1170                 spin_lock_bh(&conn->session->lock);
1171         }
1172         bnx2i_iscsi_unmap_sg_list(task->dd_data);
1173 }
1174
1175 /**
1176  * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1177  * @conn:       transport layer conn structure pointer
1178  * @task:       transport layer command structure pointer
1179  */
1180 static int
1181 bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1182 {
1183         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1184         struct bnx2i_cmd *cmd = task->dd_data;
1185
1186         memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1187
1188         bnx2i_setup_cmd_wqe_template(cmd);
1189         bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1190         if (task->data_count) {
1191                 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1192                        task->data_count);
1193                 bnx2i_conn->gen_pdu.req_wr_ptr =
1194                         bnx2i_conn->gen_pdu.req_buf + task->data_count;
1195         }
1196         cmd->conn = conn->dd_data;
1197         cmd->scsi_cmd = NULL;
1198         return bnx2i_iscsi_send_generic_request(task);
1199 }
1200
1201 /**
1202  * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1203  * @task:       transport layer command structure pointer
1204  *
1205  * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1206  */
1207 static int bnx2i_task_xmit(struct iscsi_task *task)
1208 {
1209         struct iscsi_conn *conn = task->conn;
1210         struct iscsi_session *session = conn->session;
1211         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1212         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1213         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1214         struct scsi_cmnd *sc = task->sc;
1215         struct bnx2i_cmd *cmd = task->dd_data;
1216         struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
1217
1218         if (atomic_read(&bnx2i_conn->ep->num_active_cmds) + 1  >
1219             hba->max_sqes)
1220                 return -ENOMEM;
1221
1222         /*
1223          * If there is no scsi_cmnd this must be a mgmt task
1224          */
1225         if (!sc)
1226                 return bnx2i_mtask_xmit(conn, task);
1227
1228         bnx2i_setup_cmd_wqe_template(cmd);
1229         cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1230         cmd->conn = bnx2i_conn;
1231         cmd->scsi_cmd = sc;
1232         cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1233         cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1234
1235         bnx2i_iscsi_map_sg_list(cmd);
1236         bnx2i_cpy_scsi_cdb(sc, cmd);
1237
1238         cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1239         if (sc->sc_data_direction == DMA_TO_DEVICE) {
1240                 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1241                 cmd->req.itt = task->itt |
1242                         (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1243                 bnx2i_setup_write_cmd_bd_info(task);
1244         } else {
1245                 if (scsi_bufflen(sc))
1246                         cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1247                 cmd->req.itt = task->itt |
1248                         (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1249         }
1250
1251         cmd->req.num_bds = cmd->io_tbl.bd_valid;
1252         if (!cmd->io_tbl.bd_valid) {
1253                 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1254                 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1255                 cmd->req.num_bds = 1;
1256         }
1257
1258         bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1259         return 0;
1260 }
1261
1262 /**
1263  * bnx2i_session_create - create a new iscsi session
1264  * @cmds_max:           max commands supported
1265  * @qdepth:             scsi queue depth to support
1266  * @initial_cmdsn:      initial iscsi CMDSN to be used for this session
1267  *
1268  * Creates a new iSCSI session instance on given device.
1269  */
1270 static struct iscsi_cls_session *
1271 bnx2i_session_create(struct iscsi_endpoint *ep,
1272                      uint16_t cmds_max, uint16_t qdepth,
1273                      uint32_t initial_cmdsn)
1274 {
1275         struct Scsi_Host *shost;
1276         struct iscsi_cls_session *cls_session;
1277         struct bnx2i_hba *hba;
1278         struct bnx2i_endpoint *bnx2i_ep;
1279
1280         if (!ep) {
1281                 printk(KERN_ERR "bnx2i: missing ep.\n");
1282                 return NULL;
1283         }
1284
1285         bnx2i_ep = ep->dd_data;
1286         shost = bnx2i_ep->hba->shost;
1287         hba = iscsi_host_priv(shost);
1288         if (bnx2i_adapter_ready(hba))
1289                 return NULL;
1290
1291         /*
1292          * user can override hw limit as long as it is within
1293          * the min/max.
1294          */
1295         if (cmds_max > hba->max_sqes)
1296                 cmds_max = hba->max_sqes;
1297         else if (cmds_max < BNX2I_SQ_WQES_MIN)
1298                 cmds_max = BNX2I_SQ_WQES_MIN;
1299
1300         cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1301                                           cmds_max, 0, sizeof(struct bnx2i_cmd),
1302                                           initial_cmdsn, ISCSI_MAX_TARGET);
1303         if (!cls_session)
1304                 return NULL;
1305
1306         if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1307                 goto session_teardown;
1308         return cls_session;
1309
1310 session_teardown:
1311         iscsi_session_teardown(cls_session);
1312         return NULL;
1313 }
1314
1315
1316 /**
1317  * bnx2i_session_destroy - destroys iscsi session
1318  * @cls_session:        pointer to iscsi cls session
1319  *
1320  * Destroys previously created iSCSI session instance and releases
1321  *      all resources held by it
1322  */
1323 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1324 {
1325         struct iscsi_session *session = cls_session->dd_data;
1326         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1327         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1328
1329         bnx2i_destroy_cmd_pool(hba, session);
1330         iscsi_session_teardown(cls_session);
1331 }
1332
1333
1334 /**
1335  * bnx2i_conn_create - create iscsi connection instance
1336  * @cls_session:        pointer to iscsi cls session
1337  * @cid:                iscsi cid as per rfc (not NX2's CID terminology)
1338  *
1339  * Creates a new iSCSI connection instance for a given session
1340  */
1341 static struct iscsi_cls_conn *
1342 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1343 {
1344         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1345         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1346         struct bnx2i_conn *bnx2i_conn;
1347         struct iscsi_cls_conn *cls_conn;
1348         struct iscsi_conn *conn;
1349
1350         cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1351                                     cid);
1352         if (!cls_conn)
1353                 return NULL;
1354         conn = cls_conn->dd_data;
1355
1356         bnx2i_conn = conn->dd_data;
1357         bnx2i_conn->cls_conn = cls_conn;
1358         bnx2i_conn->hba = hba;
1359
1360         atomic_set(&bnx2i_conn->work_cnt, 0);
1361
1362         /* 'ep' ptr will be assigned in bind() call */
1363         bnx2i_conn->ep = NULL;
1364         init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1365
1366         if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1367                 iscsi_conn_printk(KERN_ALERT, conn,
1368                                   "conn_new: login resc alloc failed!!\n");
1369                 goto free_conn;
1370         }
1371
1372         return cls_conn;
1373
1374 free_conn:
1375         iscsi_conn_teardown(cls_conn);
1376         return NULL;
1377 }
1378
1379 /**
1380  * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1381  * @cls_session:        pointer to iscsi cls session
1382  * @cls_conn:           pointer to iscsi cls conn
1383  * @transport_fd:       64-bit EP handle
1384  * @is_leading:         leading connection on this session?
1385  *
1386  * Binds together iSCSI session instance, iSCSI connection instance
1387  *      and the TCP connection. This routine returns error code if
1388  *      TCP connection does not belong on the device iSCSI sess/conn
1389  *      is bound
1390  */
1391 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1392                            struct iscsi_cls_conn *cls_conn,
1393                            uint64_t transport_fd, int is_leading)
1394 {
1395         struct iscsi_conn *conn = cls_conn->dd_data;
1396         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1397         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1398         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1399         struct bnx2i_endpoint *bnx2i_ep;
1400         struct iscsi_endpoint *ep;
1401         int ret_code;
1402
1403         ep = iscsi_lookup_endpoint(transport_fd);
1404         if (!ep)
1405                 return -EINVAL;
1406         /*
1407          * Forcefully terminate all in progress connection recovery at the
1408          * earliest, either in bind(), send_pdu(LOGIN), or conn_start()
1409          */
1410         if (bnx2i_adapter_ready(hba))
1411                 return -EIO;
1412
1413         bnx2i_ep = ep->dd_data;
1414         if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1415             (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1416                 /* Peer disconnect via' FIN or RST */
1417                 return -EINVAL;
1418
1419         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1420                 return -EINVAL;
1421
1422         if (bnx2i_ep->hba != hba) {
1423                 /* Error - TCP connection does not belong to this device
1424                  */
1425                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1426                                   "conn bind, ep=0x%p (%s) does not",
1427                                   bnx2i_ep, bnx2i_ep->hba->netdev->name);
1428                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1429                                   "belong to hba (%s)\n",
1430                                   hba->netdev->name);
1431                 return -EEXIST;
1432         }
1433         bnx2i_ep->conn = bnx2i_conn;
1434         bnx2i_conn->ep = bnx2i_ep;
1435         bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1436         bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1437
1438         ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1439                                                 bnx2i_ep->ep_iscsi_cid);
1440
1441         /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1442          * driver needs to explicitly replenish RQ index during setup.
1443          */
1444         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1445                 bnx2i_put_rq_buf(bnx2i_conn, 0);
1446
1447         bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1448         return ret_code;
1449 }
1450
1451
1452 /**
1453  * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1454  * @cls_conn:   pointer to iscsi cls conn
1455  *
1456  * Destroy an iSCSI connection instance and release memory resources held by
1457  *      this connection
1458  */
1459 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1460 {
1461         struct iscsi_conn *conn = cls_conn->dd_data;
1462         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1463         struct Scsi_Host *shost;
1464         struct bnx2i_hba *hba;
1465         struct bnx2i_work *work, *tmp;
1466         unsigned cpu = 0;
1467         struct bnx2i_percpu_s *p;
1468
1469         shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1470         hba = iscsi_host_priv(shost);
1471
1472         bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1473
1474         if (atomic_read(&bnx2i_conn->work_cnt)) {
1475                 for_each_online_cpu(cpu) {
1476                         p = &per_cpu(bnx2i_percpu, cpu);
1477                         spin_lock_bh(&p->p_work_lock);
1478                         list_for_each_entry_safe(work, tmp,
1479                                                  &p->work_list, list) {
1480                                 if (work->session == conn->session &&
1481                                     work->bnx2i_conn == bnx2i_conn) {
1482                                         list_del_init(&work->list);
1483                                         kfree(work);
1484                                         if (!atomic_dec_and_test(
1485                                                         &bnx2i_conn->work_cnt))
1486                                                 break;
1487                                 }
1488                         }
1489                         spin_unlock_bh(&p->p_work_lock);
1490                 }
1491         }
1492
1493         iscsi_conn_teardown(cls_conn);
1494 }
1495
1496
1497 /**
1498  * bnx2i_ep_get_param - return iscsi ep parameter to caller
1499  * @ep:         pointer to iscsi endpoint
1500  * @param:      parameter type identifier
1501  * @buf:        buffer pointer
1502  *
1503  * returns iSCSI ep parameters
1504  */
1505 static int bnx2i_ep_get_param(struct iscsi_endpoint *ep,
1506                               enum iscsi_param param, char *buf)
1507 {
1508         struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
1509         struct bnx2i_hba *hba = bnx2i_ep->hba;
1510         int len = -ENOTCONN;
1511
1512         if (!hba)
1513                 return -ENOTCONN;
1514
1515         switch (param) {
1516         case ISCSI_PARAM_CONN_PORT:
1517                 mutex_lock(&hba->net_dev_lock);
1518                 if (bnx2i_ep->cm_sk)
1519                         len = sprintf(buf, "%hu\n", bnx2i_ep->cm_sk->dst_port);
1520                 mutex_unlock(&hba->net_dev_lock);
1521                 break;
1522         case ISCSI_PARAM_CONN_ADDRESS:
1523                 mutex_lock(&hba->net_dev_lock);
1524                 if (bnx2i_ep->cm_sk)
1525                         len = sprintf(buf, "%pI4\n", &bnx2i_ep->cm_sk->dst_ip);
1526                 mutex_unlock(&hba->net_dev_lock);
1527                 break;
1528         default:
1529                 return -ENOSYS;
1530         }
1531
1532         return len;
1533 }
1534
1535 /**
1536  * bnx2i_host_get_param - returns host (adapter) related parameters
1537  * @shost:      scsi host pointer
1538  * @param:      parameter type identifier
1539  * @buf:        buffer pointer
1540  */
1541 static int bnx2i_host_get_param(struct Scsi_Host *shost,
1542                                 enum iscsi_host_param param, char *buf)
1543 {
1544         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1545         int len = 0;
1546
1547         switch (param) {
1548         case ISCSI_HOST_PARAM_HWADDRESS:
1549                 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1550                 break;
1551         case ISCSI_HOST_PARAM_NETDEV_NAME:
1552                 len = sprintf(buf, "%s\n", hba->netdev->name);
1553                 break;
1554         case ISCSI_HOST_PARAM_IPADDRESS: {
1555                 struct list_head *active_list = &hba->ep_active_list;
1556
1557                 read_lock_bh(&hba->ep_rdwr_lock);
1558                 if (!list_empty(&hba->ep_active_list)) {
1559                         struct bnx2i_endpoint *bnx2i_ep;
1560                         struct cnic_sock *csk;
1561
1562                         bnx2i_ep = list_first_entry(active_list,
1563                                                     struct bnx2i_endpoint,
1564                                                     link);
1565                         csk = bnx2i_ep->cm_sk;
1566                         if (test_bit(SK_F_IPV6, &csk->flags))
1567                                 len = sprintf(buf, "%pI6\n", csk->src_ip);
1568                         else
1569                                 len = sprintf(buf, "%pI4\n", csk->src_ip);
1570                 }
1571                 read_unlock_bh(&hba->ep_rdwr_lock);
1572                 break;
1573         }
1574         default:
1575                 return iscsi_host_get_param(shost, param, buf);
1576         }
1577         return len;
1578 }
1579
1580 /**
1581  * bnx2i_conn_start - completes iscsi connection migration to FFP
1582  * @cls_conn:   pointer to iscsi cls conn
1583  *
1584  * last call in FFP migration to handover iscsi conn to the driver
1585  */
1586 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1587 {
1588         struct iscsi_conn *conn = cls_conn->dd_data;
1589         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1590
1591         bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1592         bnx2i_update_iscsi_conn(conn);
1593
1594         /*
1595          * this should normally not sleep for a long time so it should
1596          * not disrupt the caller.
1597          */
1598         bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1599         bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1600         bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
1601         add_timer(&bnx2i_conn->ep->ofld_timer);
1602         /* update iSCSI context for this conn, wait for CNIC to complete */
1603         wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1604                         bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1605
1606         if (signal_pending(current))
1607                 flush_signals(current);
1608         del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1609
1610         iscsi_conn_start(cls_conn);
1611         return 0;
1612 }
1613
1614
1615 /**
1616  * bnx2i_conn_get_stats - returns iSCSI stats
1617  * @cls_conn:   pointer to iscsi cls conn
1618  * @stats:      pointer to iscsi statistic struct
1619  */
1620 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1621                                  struct iscsi_stats *stats)
1622 {
1623         struct iscsi_conn *conn = cls_conn->dd_data;
1624
1625         stats->txdata_octets = conn->txdata_octets;
1626         stats->rxdata_octets = conn->rxdata_octets;
1627         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1628         stats->dataout_pdus = conn->dataout_pdus_cnt;
1629         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1630         stats->datain_pdus = conn->datain_pdus_cnt;
1631         stats->r2t_pdus = conn->r2t_pdus_cnt;
1632         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1633         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1634         stats->custom_length = 3;
1635         strcpy(stats->custom[2].desc, "eh_abort_cnt");
1636         stats->custom[2].value = conn->eh_abort_cnt;
1637         stats->digest_err = 0;
1638         stats->timeout_err = 0;
1639         stats->custom_length = 0;
1640 }
1641
1642
1643 /**
1644  * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1645  * @dst_addr:   target IP address
1646  *
1647  * check if route resolves to BNX2 device
1648  */
1649 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1650 {
1651         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1652         struct bnx2i_hba *hba;
1653         struct cnic_dev *cnic = NULL;
1654
1655         hba = get_adapter_list_head();
1656         if (hba && hba->cnic)
1657                 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1658         if (!cnic) {
1659                 printk(KERN_ALERT "bnx2i: no route,"
1660                        "can't connect using cnic\n");
1661                 goto no_nx2_route;
1662         }
1663         hba = bnx2i_find_hba_for_cnic(cnic);
1664         if (!hba)
1665                 goto no_nx2_route;
1666
1667         if (bnx2i_adapter_ready(hba)) {
1668                 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1669                 goto no_nx2_route;
1670         }
1671         if (hba->netdev->mtu > hba->mtu_supported) {
1672                 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1673                                   hba->netdev->name, hba->netdev->mtu);
1674                 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1675                                   hba->mtu_supported);
1676                 goto no_nx2_route;
1677         }
1678         return hba;
1679 no_nx2_route:
1680         return NULL;
1681 }
1682
1683
1684 /**
1685  * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1686  * @hba:        pointer to adapter instance
1687  * @ep:         endpoint (transport indentifier) structure
1688  *
1689  * destroys cm_sock structure and on chip iscsi context
1690  */
1691 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1692                                  struct bnx2i_endpoint *ep)
1693 {
1694         if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk)
1695                 hba->cnic->cm_destroy(ep->cm_sk);
1696
1697         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1698             ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1699                 if (ep->conn && ep->conn->cls_conn &&
1700                     ep->conn->cls_conn->dd_data) {
1701                         struct iscsi_conn *conn = ep->conn->cls_conn->dd_data;
1702
1703                         /* Must suspend all rx queue activity for this ep */
1704                         set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
1705                 }
1706                 /* CONN_DISCONNECT timeout may or may not be an issue depending
1707                  * on what transcribed in TCP layer, different targets behave
1708                  * differently
1709                  */
1710                 printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, "
1711                                   "please submit GRC Dump, NW/PCIe trace, "
1712                                   "driver msgs to developers for analysis\n",
1713                                   hba->netdev->name);
1714         }
1715
1716         ep->state = EP_STATE_CLEANUP_START;
1717         init_timer(&ep->ofld_timer);
1718         ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies;
1719         ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1720         ep->ofld_timer.data = (unsigned long) ep;
1721         add_timer(&ep->ofld_timer);
1722
1723         bnx2i_ep_destroy_list_add(hba, ep);
1724
1725         /* destroy iSCSI context, wait for it to complete */
1726         if (bnx2i_send_conn_destroy(hba, ep))
1727                 ep->state = EP_STATE_CLEANUP_CMPL;
1728
1729         wait_event_interruptible(ep->ofld_wait,
1730                                  (ep->state != EP_STATE_CLEANUP_START));
1731
1732         if (signal_pending(current))
1733                 flush_signals(current);
1734         del_timer_sync(&ep->ofld_timer);
1735
1736         bnx2i_ep_destroy_list_del(hba, ep);
1737
1738         if (ep->state != EP_STATE_CLEANUP_CMPL)
1739                 /* should never happen */
1740                 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1741
1742         return 0;
1743 }
1744
1745
1746 /**
1747  * bnx2i_ep_connect - establish TCP connection to target portal
1748  * @shost:              scsi host
1749  * @dst_addr:           target IP address
1750  * @non_blocking:       blocking or non-blocking call
1751  *
1752  * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1753  *      with l5_core and the CNIC. This is a multi-step process of resolving
1754  *      route to target, create a iscsi connection context, handshaking with
1755  *      CNIC module to create/initialize the socket struct and finally
1756  *      sending down option-2 request to complete TCP 3-way handshake
1757  */
1758 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1759                                                struct sockaddr *dst_addr,
1760                                                int non_blocking)
1761 {
1762         u32 iscsi_cid = BNX2I_CID_RESERVED;
1763         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1764         struct sockaddr_in6 *desti6;
1765         struct bnx2i_endpoint *bnx2i_ep;
1766         struct bnx2i_hba *hba;
1767         struct cnic_dev *cnic;
1768         struct cnic_sockaddr saddr;
1769         struct iscsi_endpoint *ep;
1770         int rc = 0;
1771
1772         if (shost) {
1773                 /* driver is given scsi host to work with */
1774                 hba = iscsi_host_priv(shost);
1775         } else
1776                 /*
1777                  * check if the given destination can be reached through
1778                  * a iscsi capable NetXtreme2 device
1779                  */
1780                 hba = bnx2i_check_route(dst_addr);
1781
1782         if (!hba) {
1783                 rc = -EINVAL;
1784                 goto nohba;
1785         }
1786         mutex_lock(&hba->net_dev_lock);
1787
1788         if (bnx2i_adapter_ready(hba) || !hba->cid_que.cid_free_cnt) {
1789                 rc = -EPERM;
1790                 goto check_busy;
1791         }
1792         cnic = hba->cnic;
1793         ep = bnx2i_alloc_ep(hba);
1794         if (!ep) {
1795                 rc = -ENOMEM;
1796                 goto check_busy;
1797         }
1798         bnx2i_ep = ep->dd_data;
1799
1800         atomic_set(&bnx2i_ep->num_active_cmds, 0);
1801         iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1802         if (iscsi_cid == -1) {
1803                 printk(KERN_ALERT "bnx2i (%s): alloc_ep - unable to allocate "
1804                         "iscsi cid\n", hba->netdev->name);
1805                 rc = -ENOMEM;
1806                 bnx2i_free_ep(ep);
1807                 goto check_busy;
1808         }
1809         bnx2i_ep->hba_age = hba->age;
1810
1811         rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1812         if (rc != 0) {
1813                 printk(KERN_ALERT "bnx2i (%s): ep_conn - alloc QP resc error"
1814                         "\n", hba->netdev->name);
1815                 rc = -ENOMEM;
1816                 goto qp_resc_err;
1817         }
1818
1819         bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1820         bnx2i_ep->state = EP_STATE_OFLD_START;
1821         bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1822
1823         init_timer(&bnx2i_ep->ofld_timer);
1824         bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1825         bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1826         bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1827         add_timer(&bnx2i_ep->ofld_timer);
1828
1829         if (bnx2i_send_conn_ofld_req(hba, bnx2i_ep)) {
1830                 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1831                         printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1832                                 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1833                         rc = -EBUSY;
1834                 } else
1835                         rc = -ENOSPC;
1836                 printk(KERN_ALERT "bnx2i (%s): unable to send conn offld kwqe"
1837                         "\n", hba->netdev->name);
1838                 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1839                 goto conn_failed;
1840         }
1841
1842         /* Wait for CNIC hardware to setup conn context and return 'cid' */
1843         wait_event_interruptible(bnx2i_ep->ofld_wait,
1844                                  bnx2i_ep->state != EP_STATE_OFLD_START);
1845
1846         if (signal_pending(current))
1847                 flush_signals(current);
1848         del_timer_sync(&bnx2i_ep->ofld_timer);
1849
1850         bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1851
1852         if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1853                 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1854                         printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1855                                 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1856                         rc = -EBUSY;
1857                 } else
1858                         rc = -ENOSPC;
1859                 goto conn_failed;
1860         }
1861
1862         rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1863                              iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1864         if (rc) {
1865                 rc = -EINVAL;
1866                 /* Need to terminate and cleanup the connection */
1867                 goto release_ep;
1868         }
1869
1870         bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1871         bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1872         clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1873
1874         memset(&saddr, 0, sizeof(saddr));
1875         if (dst_addr->sa_family == AF_INET) {
1876                 desti = (struct sockaddr_in *) dst_addr;
1877                 saddr.remote.v4 = *desti;
1878                 saddr.local.v4.sin_family = desti->sin_family;
1879         } else if (dst_addr->sa_family == AF_INET6) {
1880                 desti6 = (struct sockaddr_in6 *) dst_addr;
1881                 saddr.remote.v6 = *desti6;
1882                 saddr.local.v6.sin6_family = desti6->sin6_family;
1883         }
1884
1885         bnx2i_ep->timestamp = jiffies;
1886         bnx2i_ep->state = EP_STATE_CONNECT_START;
1887         if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1888                 rc = -EINVAL;
1889                 goto conn_failed;
1890         } else
1891                 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1892         if (rc)
1893                 goto release_ep;
1894
1895         bnx2i_ep_active_list_add(hba, bnx2i_ep);
1896
1897         if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
1898                 goto del_active_ep;
1899
1900         mutex_unlock(&hba->net_dev_lock);
1901         return ep;
1902
1903 del_active_ep:
1904         bnx2i_ep_active_list_del(hba, bnx2i_ep);
1905 release_ep:
1906         if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1907                 mutex_unlock(&hba->net_dev_lock);
1908                 return ERR_PTR(rc);
1909         }
1910 conn_failed:
1911         bnx2i_free_qp_resc(hba, bnx2i_ep);
1912 qp_resc_err:
1913         bnx2i_free_ep(ep);
1914 check_busy:
1915         mutex_unlock(&hba->net_dev_lock);
1916 nohba:
1917         return ERR_PTR(rc);
1918 }
1919
1920
1921 /**
1922  * bnx2i_ep_poll - polls for TCP connection establishement
1923  * @ep:                 TCP connection (endpoint) handle
1924  * @timeout_ms:         timeout value in milli secs
1925  *
1926  * polls for TCP connect request to complete
1927  */
1928 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1929 {
1930         struct bnx2i_endpoint *bnx2i_ep;
1931         int rc = 0;
1932
1933         bnx2i_ep = ep->dd_data;
1934         if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1935             (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1936             (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1937                 return -1;
1938         if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1939                 return 1;
1940
1941         rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1942                                               ((bnx2i_ep->state ==
1943                                                 EP_STATE_OFLD_FAILED) ||
1944                                                (bnx2i_ep->state ==
1945                                                 EP_STATE_CONNECT_FAILED) ||
1946                                                (bnx2i_ep->state ==
1947                                                 EP_STATE_CONNECT_COMPL)),
1948                                               msecs_to_jiffies(timeout_ms));
1949         if (bnx2i_ep->state == EP_STATE_OFLD_FAILED)
1950                 rc = -1;
1951
1952         if (rc > 0)
1953                 return 1;
1954         else if (!rc)
1955                 return 0;       /* timeout */
1956         else
1957                 return rc;
1958 }
1959
1960
1961 /**
1962  * bnx2i_ep_tcp_conn_active - check EP state transition
1963  * @ep:         endpoint pointer
1964  *
1965  * check if underlying TCP connection is active
1966  */
1967 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1968 {
1969         int ret;
1970         int cnic_dev_10g = 0;
1971
1972         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1973                 cnic_dev_10g = 1;
1974
1975         switch (bnx2i_ep->state) {
1976         case EP_STATE_CLEANUP_FAILED:
1977         case EP_STATE_OFLD_FAILED:
1978         case EP_STATE_DISCONN_TIMEDOUT:
1979                 ret = 0;
1980                 break;
1981         case EP_STATE_CONNECT_START:
1982         case EP_STATE_CONNECT_FAILED:
1983         case EP_STATE_CONNECT_COMPL:
1984         case EP_STATE_ULP_UPDATE_START:
1985         case EP_STATE_ULP_UPDATE_COMPL:
1986         case EP_STATE_TCP_FIN_RCVD:
1987         case EP_STATE_LOGOUT_SENT:
1988         case EP_STATE_LOGOUT_RESP_RCVD:
1989         case EP_STATE_ULP_UPDATE_FAILED:
1990                 ret = 1;
1991                 break;
1992         case EP_STATE_TCP_RST_RCVD:
1993                 if (cnic_dev_10g)
1994                         ret = 0;
1995                 else
1996                         ret = 1;
1997                 break;
1998         default:
1999                 ret = 0;
2000         }
2001
2002         return ret;
2003 }
2004
2005
2006 /*
2007  * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw
2008  * @ep:         TCP connection (bnx2i endpoint) handle
2009  *
2010  * executes  TCP connection teardown process
2011  */
2012 int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep)
2013 {
2014         struct bnx2i_hba *hba = bnx2i_ep->hba;
2015         struct cnic_dev *cnic;
2016         struct iscsi_session *session = NULL;
2017         struct iscsi_conn *conn = NULL;
2018         int ret = 0;
2019         int close = 0;
2020         int close_ret = 0;
2021
2022         if (!hba)
2023                 return 0;
2024
2025         cnic = hba->cnic;
2026         if (!cnic)
2027                 return 0;
2028
2029         if (bnx2i_ep->state == EP_STATE_IDLE ||
2030             bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2031                 return 0;
2032
2033         if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
2034                 goto destroy_conn;
2035
2036         if (bnx2i_ep->conn) {
2037                 conn = bnx2i_ep->conn->cls_conn->dd_data;
2038                 session = conn->session;
2039         }
2040
2041         init_timer(&bnx2i_ep->ofld_timer);
2042         bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies;
2043         bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
2044         bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
2045         add_timer(&bnx2i_ep->ofld_timer);
2046
2047         if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
2048                 goto out;
2049
2050         if (session) {
2051                 spin_lock_bh(&session->lock);
2052                 if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) {
2053                         if (session->state == ISCSI_STATE_LOGGING_OUT) {
2054                                 if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) {
2055                                         /* Logout sent, but no resp */
2056                                         printk(KERN_ALERT "bnx2i (%s): WARNING"
2057                                                 " logout response was not "
2058                                                 "received!\n",
2059                                                 bnx2i_ep->hba->netdev->name);
2060                                 } else if (bnx2i_ep->state ==
2061                                            EP_STATE_LOGOUT_RESP_RCVD)
2062                                         close = 1;
2063                         }
2064                 } else
2065                         close = 1;
2066
2067                 spin_unlock_bh(&session->lock);
2068         }
2069
2070         bnx2i_ep->state = EP_STATE_DISCONN_START;
2071
2072         if (close)
2073                 close_ret = cnic->cm_close(bnx2i_ep->cm_sk);
2074         else
2075                 close_ret = cnic->cm_abort(bnx2i_ep->cm_sk);
2076
2077         if (close_ret)
2078                 printk(KERN_ALERT "bnx2i (%s): close/abort(%d) returned %d\n",
2079                         bnx2i_ep->hba->netdev->name, close, close_ret);
2080         else
2081                 /* wait for option-2 conn teardown */
2082                 wait_event_interruptible(bnx2i_ep->ofld_wait,
2083                                  bnx2i_ep->state != EP_STATE_DISCONN_START);
2084
2085         if (signal_pending(current))
2086                 flush_signals(current);
2087         del_timer_sync(&bnx2i_ep->ofld_timer);
2088
2089 destroy_conn:
2090         bnx2i_ep_active_list_del(hba, bnx2i_ep);
2091         if (bnx2i_tear_down_conn(hba, bnx2i_ep))
2092                 return -EINVAL;
2093 out:
2094         bnx2i_ep->state = EP_STATE_IDLE;
2095         return ret;
2096 }
2097
2098
2099 /**
2100  * bnx2i_ep_disconnect - executes TCP connection teardown process
2101  * @ep:         TCP connection (iscsi endpoint) handle
2102  *
2103  * executes  TCP connection teardown process
2104  */
2105 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
2106 {
2107         struct bnx2i_endpoint *bnx2i_ep;
2108         struct bnx2i_conn *bnx2i_conn = NULL;
2109         struct iscsi_conn *conn = NULL;
2110         struct bnx2i_hba *hba;
2111
2112         bnx2i_ep = ep->dd_data;
2113
2114         /* driver should not attempt connection cleanup until TCP_CONNECT
2115          * completes either successfully or fails. Timeout is 9-secs, so
2116          * wait for it to complete
2117          */
2118         while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
2119                 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
2120                 msleep(250);
2121
2122         if (bnx2i_ep->conn) {
2123                 bnx2i_conn = bnx2i_ep->conn;
2124                 conn = bnx2i_conn->cls_conn->dd_data;
2125                 iscsi_suspend_queue(conn);
2126         }
2127         hba = bnx2i_ep->hba;
2128
2129         mutex_lock(&hba->net_dev_lock);
2130
2131         if (bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2132                 goto out;
2133
2134         if (bnx2i_ep->state == EP_STATE_IDLE)
2135                 goto free_resc;
2136
2137         if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
2138             (bnx2i_ep->hba_age != hba->age)) {
2139                 bnx2i_ep_active_list_del(hba, bnx2i_ep);
2140                 goto free_resc;
2141         }
2142
2143         /* Do all chip cleanup here */
2144         if (bnx2i_hw_ep_disconnect(bnx2i_ep)) {
2145                 mutex_unlock(&hba->net_dev_lock);
2146                 return;
2147         }
2148 free_resc:
2149         bnx2i_free_qp_resc(hba, bnx2i_ep);
2150
2151         if (bnx2i_conn)
2152                 bnx2i_conn->ep = NULL;
2153
2154         bnx2i_free_ep(ep);
2155 out:
2156         mutex_unlock(&hba->net_dev_lock);
2157
2158         wake_up_interruptible(&hba->eh_wait);
2159 }
2160
2161
2162 /**
2163  * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
2164  * @buf:        pointer to buffer containing iscsi path message
2165  *
2166  */
2167 static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
2168 {
2169         struct bnx2i_hba *hba = iscsi_host_priv(shost);
2170         char *buf = (char *) params;
2171         u16 len = sizeof(*params);
2172
2173         /* handled by cnic driver */
2174         hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
2175                                      len);
2176
2177         return 0;
2178 }
2179
2180 static mode_t bnx2i_attr_is_visible(int param_type, int param)
2181 {
2182         switch (param_type) {
2183         case ISCSI_PARAM:
2184                 switch (param) {
2185                 case ISCSI_PARAM_MAX_RECV_DLENGTH:
2186                 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
2187                 case ISCSI_PARAM_HDRDGST_EN:
2188                 case ISCSI_PARAM_DATADGST_EN:
2189                 case ISCSI_PARAM_CONN_ADDRESS:
2190                 case ISCSI_PARAM_CONN_PORT:
2191                 case ISCSI_PARAM_EXP_STATSN:
2192                 case ISCSI_PARAM_PERSISTENT_ADDRESS:
2193                 case ISCSI_PARAM_PERSISTENT_PORT:
2194                 case ISCSI_PARAM_PING_TMO:
2195                 case ISCSI_PARAM_RECV_TMO:
2196                         return S_IRUGO;
2197                 default:
2198                         return 0;
2199                 }
2200         }
2201
2202         return 0;
2203 }
2204
2205 /*
2206  * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
2207  * used while registering with the scsi host and iSCSI transport module.
2208  */
2209 static struct scsi_host_template bnx2i_host_template = {
2210         .module                 = THIS_MODULE,
2211         .name                   = "Broadcom Offload iSCSI Initiator",
2212         .proc_name              = "bnx2i",
2213         .queuecommand           = iscsi_queuecommand,
2214         .eh_abort_handler       = iscsi_eh_abort,
2215         .eh_device_reset_handler = iscsi_eh_device_reset,
2216         .eh_target_reset_handler = iscsi_eh_recover_target,
2217         .change_queue_depth     = iscsi_change_queue_depth,
2218         .can_queue              = 2048,
2219         .max_sectors            = 127,
2220         .cmd_per_lun            = 128,
2221         .this_id                = -1,
2222         .use_clustering         = ENABLE_CLUSTERING,
2223         .sg_tablesize           = ISCSI_MAX_BDS_PER_CMD,
2224         .shost_attrs            = bnx2i_dev_attributes,
2225 };
2226
2227 struct iscsi_transport bnx2i_iscsi_transport = {
2228         .owner                  = THIS_MODULE,
2229         .name                   = "bnx2i",
2230         .caps                   = CAP_RECOVERY_L0 | CAP_HDRDGST |
2231                                   CAP_MULTI_R2T | CAP_DATADGST |
2232                                   CAP_DATA_PATH_OFFLOAD |
2233                                   CAP_TEXT_NEGO,
2234         .param_mask             = ISCSI_INITIAL_R2T_EN |
2235                                   ISCSI_MAX_R2T |
2236                                   ISCSI_IMM_DATA_EN |
2237                                   ISCSI_FIRST_BURST |
2238                                   ISCSI_MAX_BURST |
2239                                   ISCSI_PDU_INORDER_EN |
2240                                   ISCSI_DATASEQ_INORDER_EN |
2241                                   ISCSI_ERL |
2242                                   ISCSI_TARGET_NAME | ISCSI_TPGT |
2243                                   ISCSI_USERNAME | ISCSI_PASSWORD |
2244                                   ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
2245                                   ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
2246                                   ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO |
2247                                   ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
2248         .host_param_mask        = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
2249                                   ISCSI_HOST_NETDEV_NAME,
2250         .create_session         = bnx2i_session_create,
2251         .destroy_session        = bnx2i_session_destroy,
2252         .create_conn            = bnx2i_conn_create,
2253         .bind_conn              = bnx2i_conn_bind,
2254         .destroy_conn           = bnx2i_conn_destroy,
2255         .attr_is_visible        = bnx2i_attr_is_visible,
2256         .set_param              = iscsi_set_param,
2257         .get_conn_param         = iscsi_conn_get_param,
2258         .get_session_param      = iscsi_session_get_param,
2259         .get_host_param         = bnx2i_host_get_param,
2260         .start_conn             = bnx2i_conn_start,
2261         .stop_conn              = iscsi_conn_stop,
2262         .send_pdu               = iscsi_conn_send_pdu,
2263         .xmit_task              = bnx2i_task_xmit,
2264         .get_stats              = bnx2i_conn_get_stats,
2265         /* TCP connect - disconnect - option-2 interface calls */
2266         .get_ep_param           = bnx2i_ep_get_param,
2267         .ep_connect             = bnx2i_ep_connect,
2268         .ep_poll                = bnx2i_ep_poll,
2269         .ep_disconnect          = bnx2i_ep_disconnect,
2270         .set_path               = bnx2i_nl_set_path,
2271         /* Error recovery timeout call */
2272         .session_recovery_timedout = iscsi_session_recovery_timedout,
2273         .cleanup_task           = bnx2i_cleanup_task,
2274 };