Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[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 - 2009 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  */
14
15 #include <scsi/scsi_tcq.h>
16 #include <scsi/libiscsi.h>
17 #include "bnx2i.h"
18
19 struct scsi_transport_template *bnx2i_scsi_xport_template;
20 struct iscsi_transport bnx2i_iscsi_transport;
21 static struct scsi_host_template bnx2i_host_template;
22
23 /*
24  * Global endpoint resource info
25  */
26 static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */
27
28
29 static int bnx2i_adapter_ready(struct bnx2i_hba *hba)
30 {
31         int retval = 0;
32
33         if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
34             test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
35             test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
36                 retval = -EPERM;
37         return retval;
38 }
39
40 /**
41  * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks
42  * @cmd:                iscsi cmd struct pointer
43  * @buf_off:            absolute buffer offset
44  * @start_bd_off:       u32 pointer to return the offset within the BD
45  *                      indicated by 'start_bd_idx' on which 'buf_off' falls
46  * @start_bd_idx:       index of the BD on which 'buf_off' falls
47  *
48  * identifies & marks various bd info for scsi command's imm data,
49  * unsolicited data and the first solicited data seq.
50  */
51 static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off,
52                                        u32 *start_bd_off, u32 *start_bd_idx)
53 {
54         struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl;
55         u32 cur_offset = 0;
56         u32 cur_bd_idx = 0;
57
58         if (buf_off) {
59                 while (buf_off >= (cur_offset + bd_tbl->buffer_length)) {
60                         cur_offset += bd_tbl->buffer_length;
61                         cur_bd_idx++;
62                         bd_tbl++;
63                 }
64         }
65
66         *start_bd_off = buf_off - cur_offset;
67         *start_bd_idx = cur_bd_idx;
68 }
69
70 /**
71  * bnx2i_setup_write_cmd_bd_info - sets up BD various information
72  * @task:       transport layer's cmd struct pointer
73  *
74  * identifies & marks various bd info for scsi command's immediate data,
75  * unsolicited data and first solicited data seq which includes BD start
76  * index & BD buf off. his function takes into account iscsi parameter such
77  * as immediate data and unsolicited data is support on this connection.
78  */
79 static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task)
80 {
81         struct bnx2i_cmd *cmd = task->dd_data;
82         u32 start_bd_offset;
83         u32 start_bd_idx;
84         u32 buffer_offset = 0;
85         u32 cmd_len = cmd->req.total_data_transfer_length;
86
87         /* if ImmediateData is turned off & IntialR2T is turned on,
88          * there will be no immediate or unsolicited data, just return.
89          */
90         if (!iscsi_task_has_unsol_data(task) && !task->imm_count)
91                 return;
92
93         /* Immediate data */
94         buffer_offset += task->imm_count;
95         if (task->imm_count == cmd_len)
96                 return;
97
98         if (iscsi_task_has_unsol_data(task)) {
99                 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
100                                            &start_bd_offset, &start_bd_idx);
101                 cmd->req.ud_buffer_offset = start_bd_offset;
102                 cmd->req.ud_start_bd_index = start_bd_idx;
103                 buffer_offset += task->unsol_r2t.data_length;
104         }
105
106         if (buffer_offset != cmd_len) {
107                 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
108                                            &start_bd_offset, &start_bd_idx);
109                 if ((start_bd_offset > task->conn->session->first_burst) ||
110                     (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) {
111                         int i = 0;
112
113                         iscsi_conn_printk(KERN_ALERT, task->conn,
114                                           "bnx2i- error, buf offset 0x%x "
115                                           "bd_valid %d use_sg %d\n",
116                                           buffer_offset, cmd->io_tbl.bd_valid,
117                                           scsi_sg_count(cmd->scsi_cmd));
118                         for (i = 0; i < cmd->io_tbl.bd_valid; i++)
119                                 iscsi_conn_printk(KERN_ALERT, task->conn,
120                                                   "bnx2i err, bd[%d]: len %x\n",
121                                                   i, cmd->io_tbl.bd_tbl[i].\
122                                                   buffer_length);
123                 }
124                 cmd->req.sd_buffer_offset = start_bd_offset;
125                 cmd->req.sd_start_bd_index = start_bd_idx;
126         }
127 }
128
129
130
131 /**
132  * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
133  * @hba:        adapter instance
134  * @cmd:        iscsi cmd struct pointer
135  *
136  * map SG list
137  */
138 static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
139 {
140         struct scsi_cmnd *sc = cmd->scsi_cmd;
141         struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
142         struct scatterlist *sg;
143         int byte_count = 0;
144         int bd_count = 0;
145         int sg_count;
146         int sg_len;
147         u64 addr;
148         int i;
149
150         BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD);
151
152         sg_count = scsi_dma_map(sc);
153
154         scsi_for_each_sg(sc, sg, sg_count, i) {
155                 sg_len = sg_dma_len(sg);
156                 addr = (u64) sg_dma_address(sg);
157                 bd[bd_count].buffer_addr_lo = addr & 0xffffffff;
158                 bd[bd_count].buffer_addr_hi = addr >> 32;
159                 bd[bd_count].buffer_length = sg_len;
160                 bd[bd_count].flags = 0;
161                 if (bd_count == 0)
162                         bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;
163
164                 byte_count += sg_len;
165                 bd_count++;
166         }
167
168         if (bd_count)
169                 bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
170
171         BUG_ON(byte_count != scsi_bufflen(sc));
172         return bd_count;
173 }
174
175 /**
176  * bnx2i_iscsi_map_sg_list - maps SG list
177  * @cmd:        iscsi cmd struct pointer
178  *
179  * creates BD list table for the command
180  */
181 static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)
182 {
183         int bd_count;
184
185         bd_count  = bnx2i_map_scsi_sg(cmd->conn->hba, cmd);
186         if (!bd_count) {
187                 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
188
189                 bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;
190                 bd[0].buffer_length = bd[0].flags = 0;
191         }
192         cmd->io_tbl.bd_valid = bd_count;
193 }
194
195
196 /**
197  * bnx2i_iscsi_unmap_sg_list - unmaps SG list
198  * @cmd:        iscsi cmd struct pointer
199  *
200  * unmap IO buffers and invalidate the BD table
201  */
202 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)
203 {
204         struct scsi_cmnd *sc = cmd->scsi_cmd;
205
206         if (cmd->io_tbl.bd_valid && sc) {
207                 scsi_dma_unmap(sc);
208                 cmd->io_tbl.bd_valid = 0;
209         }
210 }
211
212 static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)
213 {
214         memset(&cmd->req, 0x00, sizeof(cmd->req));
215         cmd->req.op_code = 0xFF;
216         cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma;
217         cmd->req.bd_list_addr_hi =
218                 (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32);
219
220 }
221
222
223 /**
224  * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'
225  * @hba:        pointer to adapter instance
226  * @conn:       pointer to iscsi connection
227  * @iscsi_cid:  iscsi context ID, range 0 - (MAX_CONN - 1)
228  *
229  * update iscsi cid table entry with connection pointer. This enables
230  *      driver to quickly get hold of connection structure pointer in
231  *      completion/interrupt thread using iscsi context ID
232  */
233 static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,
234                                         struct bnx2i_conn *bnx2i_conn,
235                                         u32 iscsi_cid)
236 {
237         if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {
238                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
239                                  "conn bind - entry #%d not free\n", iscsi_cid);
240                 return -EBUSY;
241         }
242
243         hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn;
244         return 0;
245 }
246
247
248 /**
249  * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr
250  * @hba:        pointer to adapter instance
251  * @iscsi_cid:  iscsi context ID, range 0 - (MAX_CONN - 1)
252  */
253 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
254                                           u16 iscsi_cid)
255 {
256         if (!hba->cid_que.conn_cid_tbl) {
257                 printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n");
258                 return NULL;
259
260         } else if (iscsi_cid >= hba->max_active_conns) {
261                 printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid);
262                 return NULL;
263         }
264         return hba->cid_que.conn_cid_tbl[iscsi_cid];
265 }
266
267
268 /**
269  * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
270  * @hba:        pointer to adapter instance
271  */
272 static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)
273 {
274         int idx;
275
276         if (!hba->cid_que.cid_free_cnt)
277                 return -1;
278
279         idx = hba->cid_que.cid_q_cons_idx;
280         hba->cid_que.cid_q_cons_idx++;
281         if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx)
282                 hba->cid_que.cid_q_cons_idx = 0;
283
284         hba->cid_que.cid_free_cnt--;
285         return hba->cid_que.cid_que[idx];
286 }
287
288
289 /**
290  * bnx2i_free_iscsi_cid - returns tcp port to free list
291  * @hba:                pointer to adapter instance
292  * @iscsi_cid:          iscsi context ID to free
293  */
294 static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)
295 {
296         int idx;
297
298         if (iscsi_cid == (u16) -1)
299                 return;
300
301         hba->cid_que.cid_free_cnt++;
302
303         idx = hba->cid_que.cid_q_prod_idx;
304         hba->cid_que.cid_que[idx] = iscsi_cid;
305         hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL;
306         hba->cid_que.cid_q_prod_idx++;
307         if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx)
308                 hba->cid_que.cid_q_prod_idx = 0;
309 }
310
311
312 /**
313  * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
314  * @hba:        pointer to adapter instance
315  *
316  * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
317  *      and initialize table attributes
318  */
319 static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)
320 {
321         int mem_size;
322         int i;
323
324         mem_size = hba->max_active_conns * sizeof(u32);
325         mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
326
327         hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL);
328         if (!hba->cid_que.cid_que_base)
329                 return -ENOMEM;
330
331         mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *);
332         mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
333         hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL);
334         if (!hba->cid_que.conn_cid_tbl) {
335                 kfree(hba->cid_que.cid_que_base);
336                 hba->cid_que.cid_que_base = NULL;
337                 return -ENOMEM;
338         }
339
340         hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base;
341         hba->cid_que.cid_q_prod_idx = 0;
342         hba->cid_que.cid_q_cons_idx = 0;
343         hba->cid_que.cid_q_max_idx = hba->max_active_conns;
344         hba->cid_que.cid_free_cnt = hba->max_active_conns;
345
346         for (i = 0; i < hba->max_active_conns; i++) {
347                 hba->cid_que.cid_que[i] = i;
348                 hba->cid_que.conn_cid_tbl[i] = NULL;
349         }
350         return 0;
351 }
352
353
354 /**
355  * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
356  * @hba:        pointer to adapter instance
357  */
358 static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)
359 {
360         kfree(hba->cid_que.cid_que_base);
361         hba->cid_que.cid_que_base = NULL;
362
363         kfree(hba->cid_que.conn_cid_tbl);
364         hba->cid_que.conn_cid_tbl = NULL;
365 }
366
367
368 /**
369  * bnx2i_alloc_ep - allocates ep structure from global pool
370  * @hba:        pointer to adapter instance
371  *
372  * routine allocates a free endpoint structure from global pool and
373  *      a tcp port to be used for this connection.  Global resource lock,
374  *      'bnx2i_resc_lock' is held while accessing shared global data structures
375  */
376 static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)
377 {
378         struct iscsi_endpoint *ep;
379         struct bnx2i_endpoint *bnx2i_ep;
380
381         ep = iscsi_create_endpoint(sizeof(*bnx2i_ep));
382         if (!ep) {
383                 printk(KERN_ERR "bnx2i: Could not allocate ep\n");
384                 return NULL;
385         }
386
387         bnx2i_ep = ep->dd_data;
388         INIT_LIST_HEAD(&bnx2i_ep->link);
389         bnx2i_ep->state = EP_STATE_IDLE;
390         bnx2i_ep->ep_iscsi_cid = (u16) -1;
391         bnx2i_ep->hba = hba;
392         bnx2i_ep->hba_age = hba->age;
393         hba->ofld_conns_active++;
394         init_waitqueue_head(&bnx2i_ep->ofld_wait);
395         return ep;
396 }
397
398
399 /**
400  * bnx2i_free_ep - free endpoint
401  * @ep:         pointer to iscsi endpoint structure
402  */
403 static void bnx2i_free_ep(struct iscsi_endpoint *ep)
404 {
405         struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
406         unsigned long flags;
407
408         spin_lock_irqsave(&bnx2i_resc_lock, flags);
409         bnx2i_ep->state = EP_STATE_IDLE;
410         bnx2i_ep->hba->ofld_conns_active--;
411
412         bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);
413         if (bnx2i_ep->conn) {
414                 bnx2i_ep->conn->ep = NULL;
415                 bnx2i_ep->conn = NULL;
416         }
417
418         bnx2i_ep->hba = NULL;
419         spin_unlock_irqrestore(&bnx2i_resc_lock, flags);
420         iscsi_destroy_endpoint(ep);
421 }
422
423
424 /**
425  * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
426  * @hba:        adapter instance pointer
427  * @session:    iscsi session pointer
428  * @cmd:        iscsi command structure
429  */
430 static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,
431                            struct bnx2i_cmd *cmd)
432 {
433         struct io_bdt *io = &cmd->io_tbl;
434         struct iscsi_bd *bd;
435
436         io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
437                                         ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),
438                                         &io->bd_tbl_dma, GFP_KERNEL);
439         if (!io->bd_tbl) {
440                 iscsi_session_printk(KERN_ERR, session, "Could not "
441                                      "allocate bdt.\n");
442                 return -ENOMEM;
443         }
444         io->bd_valid = 0;
445         return 0;
446 }
447
448 /**
449  * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
450  * @hba:        adapter instance pointer
451  * @session:    iscsi session pointer
452  * @cmd:        iscsi command structure
453  */
454 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
455                                    struct iscsi_session *session)
456 {
457         int i;
458
459         for (i = 0; i < session->cmds_max; i++) {
460                 struct iscsi_task *task = session->cmds[i];
461                 struct bnx2i_cmd *cmd = task->dd_data;
462
463                 if (cmd->io_tbl.bd_tbl)
464                         dma_free_coherent(&hba->pcidev->dev,
465                                           ISCSI_MAX_BDS_PER_CMD *
466                                           sizeof(struct iscsi_bd),
467                                           cmd->io_tbl.bd_tbl,
468                                           cmd->io_tbl.bd_tbl_dma);
469         }
470
471 }
472
473
474 /**
475  * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
476  * @hba:        adapter instance pointer
477  * @session:    iscsi session pointer
478  */
479 static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
480                                 struct iscsi_session *session)
481 {
482         int i;
483
484         for (i = 0; i < session->cmds_max; i++) {
485                 struct iscsi_task *task = session->cmds[i];
486                 struct bnx2i_cmd *cmd = task->dd_data;
487
488                 task->hdr = &cmd->hdr;
489                 task->hdr_max = sizeof(struct iscsi_hdr);
490
491                 if (bnx2i_alloc_bdt(hba, session, cmd))
492                         goto free_bdts;
493         }
494
495         return 0;
496
497 free_bdts:
498         bnx2i_destroy_cmd_pool(hba, session);
499         return -ENOMEM;
500 }
501
502
503 /**
504  * bnx2i_setup_mp_bdt - allocate BD table resources
505  * @hba:        pointer to adapter structure
506  *
507  * Allocate memory for dummy buffer and associated BD
508  * table to be used by middle path (MP) requests
509  */
510 static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
511 {
512         int rc = 0;
513         struct iscsi_bd *mp_bdt;
514         u64 addr;
515
516         hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
517                                             &hba->mp_bd_dma, GFP_KERNEL);
518         if (!hba->mp_bd_tbl) {
519                 printk(KERN_ERR "unable to allocate Middle Path BDT\n");
520                 rc = -1;
521                 goto out;
522         }
523
524         hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
525                                                &hba->dummy_buf_dma, GFP_KERNEL);
526         if (!hba->dummy_buffer) {
527                 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
528                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
529                                   hba->mp_bd_tbl, hba->mp_bd_dma);
530                 hba->mp_bd_tbl = NULL;
531                 rc = -1;
532                 goto out;
533         }
534
535         mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
536         addr = (unsigned long) hba->dummy_buf_dma;
537         mp_bdt->buffer_addr_lo = addr & 0xffffffff;
538         mp_bdt->buffer_addr_hi = addr >> 32;
539         mp_bdt->buffer_length = PAGE_SIZE;
540         mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
541                         ISCSI_BD_FIRST_IN_BD_CHAIN;
542 out:
543         return rc;
544 }
545
546
547 /**
548  * bnx2i_free_mp_bdt - releases ITT back to free pool
549  * @hba:        pointer to adapter instance
550  *
551  * free MP dummy buffer and associated BD table
552  */
553 static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
554 {
555         if (hba->mp_bd_tbl) {
556                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
557                                   hba->mp_bd_tbl, hba->mp_bd_dma);
558                 hba->mp_bd_tbl = NULL;
559         }
560         if (hba->dummy_buffer) {
561                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
562                                   hba->dummy_buffer, hba->dummy_buf_dma);
563                 hba->dummy_buffer = NULL;
564         }
565                 return;
566 }
567
568 /**
569  * bnx2i_drop_session - notifies iscsid of connection error.
570  * @hba:        adapter instance pointer
571  * @session:    iscsi session pointer
572  *
573  * This notifies iscsid that there is a error, so it can initiate
574  * recovery.
575  *
576  * This relies on caller using the iscsi class iterator so the object
577  * is refcounted and does not disapper from under us.
578  */
579 void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
580 {
581         iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
582 }
583
584 /**
585  * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
586  * @hba:        pointer to adapter instance
587  * @ep:         pointer to endpoint (transport indentifier) structure
588  *
589  * EP destroy queue manager
590  */
591 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
592                                      struct bnx2i_endpoint *ep)
593 {
594         write_lock_bh(&hba->ep_rdwr_lock);
595         list_add_tail(&ep->link, &hba->ep_destroy_list);
596         write_unlock_bh(&hba->ep_rdwr_lock);
597         return 0;
598 }
599
600 /**
601  * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
602  *
603  * @hba:                pointer to adapter instance
604  * @ep:                 pointer to endpoint (transport indentifier) structure
605  *
606  * EP destroy queue manager
607  */
608 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
609                                      struct bnx2i_endpoint *ep)
610 {
611         write_lock_bh(&hba->ep_rdwr_lock);
612         list_del_init(&ep->link);
613         write_unlock_bh(&hba->ep_rdwr_lock);
614
615         return 0;
616 }
617
618 /**
619  * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
620  * @hba:        pointer to adapter instance
621  * @ep:         pointer to endpoint (transport indentifier) structure
622  *
623  * pending conn offload completion queue manager
624  */
625 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
626                                   struct bnx2i_endpoint *ep)
627 {
628         write_lock_bh(&hba->ep_rdwr_lock);
629         list_add_tail(&ep->link, &hba->ep_ofld_list);
630         write_unlock_bh(&hba->ep_rdwr_lock);
631         return 0;
632 }
633
634 /**
635  * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
636  * @hba:                pointer to adapter instance
637  * @ep:                 pointer to endpoint (transport indentifier) structure
638  *
639  * pending conn offload completion queue manager
640  */
641 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
642                                   struct bnx2i_endpoint *ep)
643 {
644         write_lock_bh(&hba->ep_rdwr_lock);
645         list_del_init(&ep->link);
646         write_unlock_bh(&hba->ep_rdwr_lock);
647         return 0;
648 }
649
650
651 /**
652  * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
653  *
654  * @hba:                pointer to adapter instance
655  * @iscsi_cid:          iscsi context ID to find
656  *
657  */
658 struct bnx2i_endpoint *
659 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
660 {
661         struct list_head *list;
662         struct list_head *tmp;
663         struct bnx2i_endpoint *ep;
664
665         read_lock_bh(&hba->ep_rdwr_lock);
666         list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
667                 ep = (struct bnx2i_endpoint *)list;
668
669                 if (ep->ep_iscsi_cid == iscsi_cid)
670                         break;
671                 ep = NULL;
672         }
673         read_unlock_bh(&hba->ep_rdwr_lock);
674
675         if (!ep)
676                 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
677         return ep;
678 }
679
680
681 /**
682  * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
683  * @hba:                pointer to adapter instance
684  * @iscsi_cid:          iscsi context ID to find
685  *
686  */
687 struct bnx2i_endpoint *
688 bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
689 {
690         struct list_head *list;
691         struct list_head *tmp;
692         struct bnx2i_endpoint *ep;
693
694         read_lock_bh(&hba->ep_rdwr_lock);
695         list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
696                 ep = (struct bnx2i_endpoint *)list;
697
698                 if (ep->ep_iscsi_cid == iscsi_cid)
699                         break;
700                 ep = NULL;
701         }
702         read_unlock_bh(&hba->ep_rdwr_lock);
703
704         if (!ep)
705                 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
706
707         return ep;
708 }
709
710 /**
711  * bnx2i_setup_host_queue_size - assigns shost->can_queue param
712  * @hba:        pointer to adapter instance
713  * @shost:      scsi host pointer
714  *
715  * Initializes 'can_queue' parameter based on how many outstanding commands
716  *      the device can handle. Each device 5708/5709/57710 has different
717  *      capabilities
718  */
719 static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
720                                         struct Scsi_Host *shost)
721 {
722         if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
723                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
724         else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
725                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
726         else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
727                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
728         else
729                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
730 }
731
732
733 /**
734  * bnx2i_alloc_hba - allocate and init adapter instance
735  * @cnic:       cnic device pointer
736  *
737  * allocate & initialize adapter structure and call other
738  *      support routines to do per adapter initialization
739  */
740 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
741 {
742         struct Scsi_Host *shost;
743         struct bnx2i_hba *hba;
744
745         shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
746         if (!shost)
747                 return NULL;
748         shost->dma_boundary = cnic->pcidev->dma_mask;
749         shost->transportt = bnx2i_scsi_xport_template;
750         shost->max_id = ISCSI_MAX_CONNS_PER_HBA;
751         shost->max_channel = 0;
752         shost->max_lun = 512;
753         shost->max_cmd_len = 16;
754
755         hba = iscsi_host_priv(shost);
756         hba->shost = shost;
757         hba->netdev = cnic->netdev;
758         /* Get PCI related information and update hba struct members */
759         hba->pcidev = cnic->pcidev;
760         pci_dev_get(hba->pcidev);
761         hba->pci_did = hba->pcidev->device;
762         hba->pci_vid = hba->pcidev->vendor;
763         hba->pci_sdid = hba->pcidev->subsystem_device;
764         hba->pci_svid = hba->pcidev->subsystem_vendor;
765         hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
766         hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
767
768         bnx2i_identify_device(hba);
769         bnx2i_setup_host_queue_size(hba, shost);
770
771         if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
772                 hba->regview = ioremap_nocache(hba->netdev->base_addr,
773                                                BNX2_MQ_CONFIG2);
774                 if (!hba->regview)
775                         goto ioreg_map_err;
776         } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
777                 hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096);
778                 if (!hba->regview)
779                         goto ioreg_map_err;
780         }
781
782         if (bnx2i_setup_mp_bdt(hba))
783                 goto mp_bdt_mem_err;
784
785         INIT_LIST_HEAD(&hba->ep_ofld_list);
786         INIT_LIST_HEAD(&hba->ep_destroy_list);
787         rwlock_init(&hba->ep_rdwr_lock);
788
789         hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
790
791         /* different values for 5708/5709/57710 */
792         hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
793
794         if (bnx2i_setup_free_cid_que(hba))
795                 goto cid_que_err;
796
797         /* SQ/RQ/CQ size can be changed via sysfx interface */
798         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
799                 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
800                         hba->max_sqes = sq_size;
801                 else
802                         hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
803         } else {        /* 5706/5708/5709 */
804                 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
805                         hba->max_sqes = sq_size;
806                 else
807                         hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
808         }
809
810         hba->max_rqes = rq_size;
811         hba->max_cqes = hba->max_sqes + rq_size;
812         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
813                 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
814                         hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
815         } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
816                 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
817
818         hba->num_ccell = hba->max_sqes / 2;
819
820         spin_lock_init(&hba->lock);
821         mutex_init(&hba->net_dev_lock);
822
823         if (iscsi_host_add(shost, &hba->pcidev->dev))
824                 goto free_dump_mem;
825         return hba;
826
827 free_dump_mem:
828         bnx2i_release_free_cid_que(hba);
829 cid_que_err:
830         bnx2i_free_mp_bdt(hba);
831 mp_bdt_mem_err:
832         if (hba->regview) {
833                 iounmap(hba->regview);
834                 hba->regview = NULL;
835         }
836 ioreg_map_err:
837         pci_dev_put(hba->pcidev);
838         scsi_host_put(shost);
839         return NULL;
840 }
841
842 /**
843  * bnx2i_free_hba- releases hba structure and resources held by the adapter
844  * @hba:        pointer to adapter instance
845  *
846  * free adapter structure and call various cleanup routines.
847  */
848 void bnx2i_free_hba(struct bnx2i_hba *hba)
849 {
850         struct Scsi_Host *shost = hba->shost;
851
852         iscsi_host_remove(shost);
853         INIT_LIST_HEAD(&hba->ep_ofld_list);
854         INIT_LIST_HEAD(&hba->ep_destroy_list);
855         pci_dev_put(hba->pcidev);
856
857         if (hba->regview) {
858                 iounmap(hba->regview);
859                 hba->regview = NULL;
860         }
861         bnx2i_free_mp_bdt(hba);
862         bnx2i_release_free_cid_que(hba);
863         iscsi_host_free(shost);
864 }
865
866 /**
867  * bnx2i_conn_free_login_resources - free DMA resources used for login process
868  * @hba:                pointer to adapter instance
869  * @bnx2i_conn:         iscsi connection pointer
870  *
871  * Login related resources, mostly BDT & payload DMA memory is freed
872  */
873 static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
874                                             struct bnx2i_conn *bnx2i_conn)
875 {
876         if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
877                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
878                                   bnx2i_conn->gen_pdu.resp_bd_tbl,
879                                   bnx2i_conn->gen_pdu.resp_bd_dma);
880                 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
881         }
882
883         if (bnx2i_conn->gen_pdu.req_bd_tbl) {
884                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
885                                   bnx2i_conn->gen_pdu.req_bd_tbl,
886                                   bnx2i_conn->gen_pdu.req_bd_dma);
887                 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
888         }
889
890         if (bnx2i_conn->gen_pdu.resp_buf) {
891                 dma_free_coherent(&hba->pcidev->dev,
892                                   ISCSI_DEF_MAX_RECV_SEG_LEN,
893                                   bnx2i_conn->gen_pdu.resp_buf,
894                                   bnx2i_conn->gen_pdu.resp_dma_addr);
895                 bnx2i_conn->gen_pdu.resp_buf = NULL;
896         }
897
898         if (bnx2i_conn->gen_pdu.req_buf) {
899                 dma_free_coherent(&hba->pcidev->dev,
900                                   ISCSI_DEF_MAX_RECV_SEG_LEN,
901                                   bnx2i_conn->gen_pdu.req_buf,
902                                   bnx2i_conn->gen_pdu.req_dma_addr);
903                 bnx2i_conn->gen_pdu.req_buf = NULL;
904         }
905 }
906
907 /**
908  * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
909  * @hba:                pointer to adapter instance
910  * @bnx2i_conn:         iscsi connection pointer
911  *
912  * Mgmt task DNA resources are allocated in this routine.
913  */
914 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
915                                             struct bnx2i_conn *bnx2i_conn)
916 {
917         /* Allocate memory for login request/response buffers */
918         bnx2i_conn->gen_pdu.req_buf =
919                 dma_alloc_coherent(&hba->pcidev->dev,
920                                    ISCSI_DEF_MAX_RECV_SEG_LEN,
921                                    &bnx2i_conn->gen_pdu.req_dma_addr,
922                                    GFP_KERNEL);
923         if (bnx2i_conn->gen_pdu.req_buf == NULL)
924                 goto login_req_buf_failure;
925
926         bnx2i_conn->gen_pdu.req_buf_size = 0;
927         bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
928
929         bnx2i_conn->gen_pdu.resp_buf =
930                 dma_alloc_coherent(&hba->pcidev->dev,
931                                    ISCSI_DEF_MAX_RECV_SEG_LEN,
932                                    &bnx2i_conn->gen_pdu.resp_dma_addr,
933                                    GFP_KERNEL);
934         if (bnx2i_conn->gen_pdu.resp_buf == NULL)
935                 goto login_resp_buf_failure;
936
937         bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
938         bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
939
940         bnx2i_conn->gen_pdu.req_bd_tbl =
941                 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
942                                    &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
943         if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
944                 goto login_req_bd_tbl_failure;
945
946         bnx2i_conn->gen_pdu.resp_bd_tbl =
947                 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
948                                    &bnx2i_conn->gen_pdu.resp_bd_dma,
949                                    GFP_KERNEL);
950         if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
951                 goto login_resp_bd_tbl_failure;
952
953         return 0;
954
955 login_resp_bd_tbl_failure:
956         dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
957                           bnx2i_conn->gen_pdu.req_bd_tbl,
958                           bnx2i_conn->gen_pdu.req_bd_dma);
959         bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
960
961 login_req_bd_tbl_failure:
962         dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
963                           bnx2i_conn->gen_pdu.resp_buf,
964                           bnx2i_conn->gen_pdu.resp_dma_addr);
965         bnx2i_conn->gen_pdu.resp_buf = NULL;
966 login_resp_buf_failure:
967         dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
968                           bnx2i_conn->gen_pdu.req_buf,
969                           bnx2i_conn->gen_pdu.req_dma_addr);
970         bnx2i_conn->gen_pdu.req_buf = NULL;
971 login_req_buf_failure:
972         iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
973                           "login resource alloc failed!!\n");
974         return -ENOMEM;
975
976 }
977
978
979 /**
980  * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
981  * @bnx2i_conn:         iscsi connection pointer
982  *
983  * Allocates buffers and BD tables before shipping requests to cnic
984  *      for PDUs prepared by 'iscsid' daemon
985  */
986 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
987 {
988         struct iscsi_bd *bd_tbl;
989
990         bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
991
992         bd_tbl->buffer_addr_hi =
993                 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
994         bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
995         bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
996                                 bnx2i_conn->gen_pdu.req_buf;
997         bd_tbl->reserved0 = 0;
998         bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
999                         ISCSI_BD_FIRST_IN_BD_CHAIN;
1000
1001         bd_tbl = (struct iscsi_bd  *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1002         bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1003         bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1004         bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1005         bd_tbl->reserved0 = 0;
1006         bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1007                         ISCSI_BD_FIRST_IN_BD_CHAIN;
1008 }
1009
1010
1011 /**
1012  * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1013  * @task:       transport layer task pointer
1014  *
1015  * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1016  *      Nop-out and Logout requests flow through this path.
1017  */
1018 static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1019 {
1020         struct bnx2i_cmd *cmd = task->dd_data;
1021         struct bnx2i_conn *bnx2i_conn = cmd->conn;
1022         int rc = 0;
1023         char *buf;
1024         int data_len;
1025
1026         bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1027         switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1028         case ISCSI_OP_LOGIN:
1029                 bnx2i_send_iscsi_login(bnx2i_conn, task);
1030                 break;
1031         case ISCSI_OP_NOOP_OUT:
1032                 data_len = bnx2i_conn->gen_pdu.req_buf_size;
1033                 buf = bnx2i_conn->gen_pdu.req_buf;
1034                 if (data_len)
1035                         rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1036                                                      RESERVED_ITT,
1037                                                      buf, data_len, 1);
1038                 else
1039                         rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1040                                                      RESERVED_ITT,
1041                                                      NULL, 0, 1);
1042                 break;
1043         case ISCSI_OP_LOGOUT:
1044                 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1045                 break;
1046         case ISCSI_OP_SCSI_TMFUNC:
1047                 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1048                 break;
1049         default:
1050                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1051                                   "send_gen: unsupported op 0x%x\n",
1052                                   task->hdr->opcode);
1053         }
1054         return rc;
1055 }
1056
1057
1058 /**********************************************************************
1059  *              SCSI-ML Interface
1060  **********************************************************************/
1061
1062 /**
1063  * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1064  * @sc:         SCSI-ML command pointer
1065  * @cmd:        iscsi cmd pointer
1066  */
1067 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1068 {
1069         u32 dword;
1070         int lpcnt;
1071         u8 *srcp;
1072         u32 *dstp;
1073         u32 scsi_lun[2];
1074
1075         int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1076         cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1077         cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1078
1079         lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1080         srcp = (u8 *) sc->cmnd;
1081         dstp = (u32 *) cmd->req.cdb;
1082         while (lpcnt--) {
1083                 memcpy(&dword, (const void *) srcp, 4);
1084                 *dstp = cpu_to_be32(dword);
1085                 srcp += 4;
1086                 dstp++;
1087         }
1088         if (sc->cmd_len & 0x3) {
1089                 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1090                 *dstp = cpu_to_be32(dword);
1091         }
1092 }
1093
1094 static void bnx2i_cleanup_task(struct iscsi_task *task)
1095 {
1096         struct iscsi_conn *conn = task->conn;
1097         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1098         struct bnx2i_hba *hba = bnx2i_conn->hba;
1099
1100         /*
1101          * mgmt task or cmd was never sent to us to transmit.
1102          */
1103         if (!task->sc || task->state == ISCSI_TASK_PENDING)
1104                 return;
1105         /*
1106          * need to clean-up task context to claim dma buffers
1107          */
1108         if (task->state == ISCSI_TASK_ABRT_TMF) {
1109                 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1110
1111                 spin_unlock_bh(&conn->session->lock);
1112                 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1113                                 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1114                 spin_lock_bh(&conn->session->lock);
1115         }
1116         bnx2i_iscsi_unmap_sg_list(task->dd_data);
1117 }
1118
1119 /**
1120  * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1121  * @conn:       transport layer conn structure pointer
1122  * @task:       transport layer command structure pointer
1123  */
1124 static int
1125 bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1126 {
1127         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1128         struct bnx2i_cmd *cmd = task->dd_data;
1129
1130         memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1131
1132         bnx2i_setup_cmd_wqe_template(cmd);
1133         bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1134         if (task->data_count) {
1135                 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1136                        task->data_count);
1137                 bnx2i_conn->gen_pdu.req_wr_ptr =
1138                         bnx2i_conn->gen_pdu.req_buf + task->data_count;
1139         }
1140         cmd->conn = conn->dd_data;
1141         cmd->scsi_cmd = NULL;
1142         return bnx2i_iscsi_send_generic_request(task);
1143 }
1144
1145 /**
1146  * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1147  * @task:       transport layer command structure pointer
1148  *
1149  * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1150  */
1151 static int bnx2i_task_xmit(struct iscsi_task *task)
1152 {
1153         struct iscsi_conn *conn = task->conn;
1154         struct iscsi_session *session = conn->session;
1155         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1156         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1157         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1158         struct scsi_cmnd *sc = task->sc;
1159         struct bnx2i_cmd *cmd = task->dd_data;
1160         struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr;
1161
1162         /*
1163          * If there is no scsi_cmnd this must be a mgmt task
1164          */
1165         if (!sc)
1166                 return bnx2i_mtask_xmit(conn, task);
1167
1168         bnx2i_setup_cmd_wqe_template(cmd);
1169         cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1170         cmd->conn = bnx2i_conn;
1171         cmd->scsi_cmd = sc;
1172         cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1173         cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1174
1175         bnx2i_iscsi_map_sg_list(cmd);
1176         bnx2i_cpy_scsi_cdb(sc, cmd);
1177
1178         cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1179         if (sc->sc_data_direction == DMA_TO_DEVICE) {
1180                 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1181                 cmd->req.itt = task->itt |
1182                         (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1183                 bnx2i_setup_write_cmd_bd_info(task);
1184         } else {
1185                 if (scsi_bufflen(sc))
1186                         cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1187                 cmd->req.itt = task->itt |
1188                         (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1189         }
1190
1191         cmd->req.num_bds = cmd->io_tbl.bd_valid;
1192         if (!cmd->io_tbl.bd_valid) {
1193                 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1194                 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1195                 cmd->req.num_bds = 1;
1196         }
1197
1198         bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1199         return 0;
1200 }
1201
1202 /**
1203  * bnx2i_session_create - create a new iscsi session
1204  * @cmds_max:           max commands supported
1205  * @qdepth:             scsi queue depth to support
1206  * @initial_cmdsn:      initial iscsi CMDSN to be used for this session
1207  *
1208  * Creates a new iSCSI session instance on given device.
1209  */
1210 static struct iscsi_cls_session *
1211 bnx2i_session_create(struct iscsi_endpoint *ep,
1212                      uint16_t cmds_max, uint16_t qdepth,
1213                      uint32_t initial_cmdsn)
1214 {
1215         struct Scsi_Host *shost;
1216         struct iscsi_cls_session *cls_session;
1217         struct bnx2i_hba *hba;
1218         struct bnx2i_endpoint *bnx2i_ep;
1219
1220         if (!ep) {
1221                 printk(KERN_ERR "bnx2i: missing ep.\n");
1222                 return NULL;
1223         }
1224
1225         bnx2i_ep = ep->dd_data;
1226         shost = bnx2i_ep->hba->shost;
1227         hba = iscsi_host_priv(shost);
1228         if (bnx2i_adapter_ready(hba))
1229                 return NULL;
1230
1231         /*
1232          * user can override hw limit as long as it is within
1233          * the min/max.
1234          */
1235         if (cmds_max > hba->max_sqes)
1236                 cmds_max = hba->max_sqes;
1237         else if (cmds_max < BNX2I_SQ_WQES_MIN)
1238                 cmds_max = BNX2I_SQ_WQES_MIN;
1239
1240         cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1241                                           cmds_max, 0, sizeof(struct bnx2i_cmd),
1242                                           initial_cmdsn, ISCSI_MAX_TARGET);
1243         if (!cls_session)
1244                 return NULL;
1245
1246         if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1247                 goto session_teardown;
1248         return cls_session;
1249
1250 session_teardown:
1251         iscsi_session_teardown(cls_session);
1252         return NULL;
1253 }
1254
1255
1256 /**
1257  * bnx2i_session_destroy - destroys iscsi session
1258  * @cls_session:        pointer to iscsi cls session
1259  *
1260  * Destroys previously created iSCSI session instance and releases
1261  *      all resources held by it
1262  */
1263 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1264 {
1265         struct iscsi_session *session = cls_session->dd_data;
1266         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1267         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1268
1269         bnx2i_destroy_cmd_pool(hba, session);
1270         iscsi_session_teardown(cls_session);
1271 }
1272
1273
1274 /**
1275  * bnx2i_conn_create - create iscsi connection instance
1276  * @cls_session:        pointer to iscsi cls session
1277  * @cid:                iscsi cid as per rfc (not NX2's CID terminology)
1278  *
1279  * Creates a new iSCSI connection instance for a given session
1280  */
1281 static struct iscsi_cls_conn *
1282 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1283 {
1284         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1285         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1286         struct bnx2i_conn *bnx2i_conn;
1287         struct iscsi_cls_conn *cls_conn;
1288         struct iscsi_conn *conn;
1289
1290         cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1291                                     cid);
1292         if (!cls_conn)
1293                 return NULL;
1294         conn = cls_conn->dd_data;
1295
1296         bnx2i_conn = conn->dd_data;
1297         bnx2i_conn->cls_conn = cls_conn;
1298         bnx2i_conn->hba = hba;
1299         /* 'ep' ptr will be assigned in bind() call */
1300         bnx2i_conn->ep = NULL;
1301         init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1302
1303         if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1304                 iscsi_conn_printk(KERN_ALERT, conn,
1305                                   "conn_new: login resc alloc failed!!\n");
1306                 goto free_conn;
1307         }
1308
1309         return cls_conn;
1310
1311 free_conn:
1312         iscsi_conn_teardown(cls_conn);
1313         return NULL;
1314 }
1315
1316 /**
1317  * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1318  * @cls_session:        pointer to iscsi cls session
1319  * @cls_conn:           pointer to iscsi cls conn
1320  * @transport_fd:       64-bit EP handle
1321  * @is_leading:         leading connection on this session?
1322  *
1323  * Binds together iSCSI session instance, iSCSI connection instance
1324  *      and the TCP connection. This routine returns error code if
1325  *      TCP connection does not belong on the device iSCSI sess/conn
1326  *      is bound
1327  */
1328 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1329                            struct iscsi_cls_conn *cls_conn,
1330                            uint64_t transport_fd, int is_leading)
1331 {
1332         struct iscsi_conn *conn = cls_conn->dd_data;
1333         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1334         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1335         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1336         struct bnx2i_endpoint *bnx2i_ep;
1337         struct iscsi_endpoint *ep;
1338         int ret_code;
1339
1340         ep = iscsi_lookup_endpoint(transport_fd);
1341         if (!ep)
1342                 return -EINVAL;
1343
1344         bnx2i_ep = ep->dd_data;
1345         if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1346             (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1347                 /* Peer disconnect via' FIN or RST */
1348                 return -EINVAL;
1349
1350         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1351                 return -EINVAL;
1352
1353         if (bnx2i_ep->hba != hba) {
1354                 /* Error - TCP connection does not belong to this device
1355                  */
1356                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1357                                   "conn bind, ep=0x%p (%s) does not",
1358                                   bnx2i_ep, bnx2i_ep->hba->netdev->name);
1359                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1360                                   "belong to hba (%s)\n",
1361                                   hba->netdev->name);
1362                 return -EEXIST;
1363         }
1364
1365         bnx2i_ep->conn = bnx2i_conn;
1366         bnx2i_conn->ep = bnx2i_ep;
1367         bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1368         bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1369
1370         ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1371                                                 bnx2i_ep->ep_iscsi_cid);
1372
1373         /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1374          * driver needs to explicitly replenish RQ index during setup.
1375          */
1376         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1377                 bnx2i_put_rq_buf(bnx2i_conn, 0);
1378
1379         bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1380         return ret_code;
1381 }
1382
1383
1384 /**
1385  * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1386  * @cls_conn:   pointer to iscsi cls conn
1387  *
1388  * Destroy an iSCSI connection instance and release memory resources held by
1389  *      this connection
1390  */
1391 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1392 {
1393         struct iscsi_conn *conn = cls_conn->dd_data;
1394         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1395         struct Scsi_Host *shost;
1396         struct bnx2i_hba *hba;
1397
1398         shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1399         hba = iscsi_host_priv(shost);
1400
1401         bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1402         iscsi_conn_teardown(cls_conn);
1403 }
1404
1405
1406 /**
1407  * bnx2i_conn_get_param - return iscsi connection parameter to caller
1408  * @cls_conn:   pointer to iscsi cls conn
1409  * @param:      parameter type identifier
1410  * @buf:        buffer pointer
1411  *
1412  * returns iSCSI connection parameters
1413  */
1414 static int bnx2i_conn_get_param(struct iscsi_cls_conn *cls_conn,
1415                                 enum iscsi_param param, char *buf)
1416 {
1417         struct iscsi_conn *conn = cls_conn->dd_data;
1418         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1419         int len = 0;
1420
1421         switch (param) {
1422         case ISCSI_PARAM_CONN_PORT:
1423                 if (bnx2i_conn->ep)
1424                         len = sprintf(buf, "%hu\n",
1425                                       bnx2i_conn->ep->cm_sk->dst_port);
1426                 break;
1427         case ISCSI_PARAM_CONN_ADDRESS:
1428                 if (bnx2i_conn->ep)
1429                         len = sprintf(buf, "%pI4\n",
1430                                       &bnx2i_conn->ep->cm_sk->dst_ip);
1431                 break;
1432         default:
1433                 return iscsi_conn_get_param(cls_conn, param, buf);
1434         }
1435
1436         return len;
1437 }
1438
1439 /**
1440  * bnx2i_host_get_param - returns host (adapter) related parameters
1441  * @shost:      scsi host pointer
1442  * @param:      parameter type identifier
1443  * @buf:        buffer pointer
1444  */
1445 static int bnx2i_host_get_param(struct Scsi_Host *shost,
1446                                 enum iscsi_host_param param, char *buf)
1447 {
1448         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1449         int len = 0;
1450
1451         switch (param) {
1452         case ISCSI_HOST_PARAM_HWADDRESS:
1453                 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1454                 break;
1455         case ISCSI_HOST_PARAM_NETDEV_NAME:
1456                 len = sprintf(buf, "%s\n", hba->netdev->name);
1457                 break;
1458         default:
1459                 return iscsi_host_get_param(shost, param, buf);
1460         }
1461         return len;
1462 }
1463
1464 /**
1465  * bnx2i_conn_start - completes iscsi connection migration to FFP
1466  * @cls_conn:   pointer to iscsi cls conn
1467  *
1468  * last call in FFP migration to handover iscsi conn to the driver
1469  */
1470 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1471 {
1472         struct iscsi_conn *conn = cls_conn->dd_data;
1473         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1474
1475         bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1476         bnx2i_update_iscsi_conn(conn);
1477
1478         /*
1479          * this should normally not sleep for a long time so it should
1480          * not disrupt the caller.
1481          */
1482         bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1483         bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1484         bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
1485         add_timer(&bnx2i_conn->ep->ofld_timer);
1486         /* update iSCSI context for this conn, wait for CNIC to complete */
1487         wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1488                         bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1489
1490         if (signal_pending(current))
1491                 flush_signals(current);
1492         del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1493
1494         iscsi_conn_start(cls_conn);
1495         return 0;
1496 }
1497
1498
1499 /**
1500  * bnx2i_conn_get_stats - returns iSCSI stats
1501  * @cls_conn:   pointer to iscsi cls conn
1502  * @stats:      pointer to iscsi statistic struct
1503  */
1504 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1505                                  struct iscsi_stats *stats)
1506 {
1507         struct iscsi_conn *conn = cls_conn->dd_data;
1508
1509         stats->txdata_octets = conn->txdata_octets;
1510         stats->rxdata_octets = conn->rxdata_octets;
1511         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1512         stats->dataout_pdus = conn->dataout_pdus_cnt;
1513         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1514         stats->datain_pdus = conn->datain_pdus_cnt;
1515         stats->r2t_pdus = conn->r2t_pdus_cnt;
1516         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1517         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1518         stats->custom_length = 3;
1519         strcpy(stats->custom[2].desc, "eh_abort_cnt");
1520         stats->custom[2].value = conn->eh_abort_cnt;
1521         stats->digest_err = 0;
1522         stats->timeout_err = 0;
1523         stats->custom_length = 0;
1524 }
1525
1526
1527 /**
1528  * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1529  * @dst_addr:   target IP address
1530  *
1531  * check if route resolves to BNX2 device
1532  */
1533 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1534 {
1535         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1536         struct bnx2i_hba *hba;
1537         struct cnic_dev *cnic = NULL;
1538
1539         bnx2i_reg_dev_all();
1540
1541         hba = get_adapter_list_head();
1542         if (hba && hba->cnic)
1543                 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1544         if (!cnic) {
1545                 printk(KERN_ALERT "bnx2i: no route,"
1546                        "can't connect using cnic\n");
1547                 goto no_nx2_route;
1548         }
1549         hba = bnx2i_find_hba_for_cnic(cnic);
1550         if (!hba)
1551                 goto no_nx2_route;
1552
1553         if (bnx2i_adapter_ready(hba)) {
1554                 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1555                 goto no_nx2_route;
1556         }
1557         if (hba->netdev->mtu > hba->mtu_supported) {
1558                 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1559                                   hba->netdev->name, hba->netdev->mtu);
1560                 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1561                                   hba->mtu_supported);
1562                 goto no_nx2_route;
1563         }
1564         return hba;
1565 no_nx2_route:
1566         return NULL;
1567 }
1568
1569
1570 /**
1571  * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1572  * @hba:        pointer to adapter instance
1573  * @ep:         endpoint (transport indentifier) structure
1574  *
1575  * destroys cm_sock structure and on chip iscsi context
1576  */
1577 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1578                                  struct bnx2i_endpoint *ep)
1579 {
1580         if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
1581                 hba->cnic->cm_destroy(ep->cm_sk);
1582
1583         if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
1584                 ep->state = EP_STATE_DISCONN_COMPL;
1585
1586         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1587             ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1588                 printk(KERN_ALERT "bnx2i - ERROR - please submit GRC Dump,"
1589                                   " NW/PCIe trace, driver msgs to developers"
1590                                   " for analysis\n");
1591                 return 1;
1592         }
1593
1594         ep->state = EP_STATE_CLEANUP_START;
1595         init_timer(&ep->ofld_timer);
1596         ep->ofld_timer.expires = 10*HZ + jiffies;
1597         ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1598         ep->ofld_timer.data = (unsigned long) ep;
1599         add_timer(&ep->ofld_timer);
1600
1601         bnx2i_ep_destroy_list_add(hba, ep);
1602
1603         /* destroy iSCSI context, wait for it to complete */
1604         bnx2i_send_conn_destroy(hba, ep);
1605         wait_event_interruptible(ep->ofld_wait,
1606                                  (ep->state != EP_STATE_CLEANUP_START));
1607
1608         if (signal_pending(current))
1609                 flush_signals(current);
1610         del_timer_sync(&ep->ofld_timer);
1611
1612         bnx2i_ep_destroy_list_del(hba, ep);
1613
1614         if (ep->state != EP_STATE_CLEANUP_CMPL)
1615                 /* should never happen */
1616                 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1617
1618         return 0;
1619 }
1620
1621
1622 /**
1623  * bnx2i_ep_connect - establish TCP connection to target portal
1624  * @shost:              scsi host
1625  * @dst_addr:           target IP address
1626  * @non_blocking:       blocking or non-blocking call
1627  *
1628  * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1629  *      with l5_core and the CNIC. This is a multi-step process of resolving
1630  *      route to target, create a iscsi connection context, handshaking with
1631  *      CNIC module to create/initialize the socket struct and finally
1632  *      sending down option-2 request to complete TCP 3-way handshake
1633  */
1634 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1635                                                struct sockaddr *dst_addr,
1636                                                int non_blocking)
1637 {
1638         u32 iscsi_cid = BNX2I_CID_RESERVED;
1639         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1640         struct sockaddr_in6 *desti6;
1641         struct bnx2i_endpoint *bnx2i_ep;
1642         struct bnx2i_hba *hba;
1643         struct cnic_dev *cnic;
1644         struct cnic_sockaddr saddr;
1645         struct iscsi_endpoint *ep;
1646         int rc = 0;
1647
1648         if (shost) {
1649                 /* driver is given scsi host to work with */
1650                 hba = iscsi_host_priv(shost);
1651                 /* Register the device with cnic if not already done so */
1652                 bnx2i_register_device(hba);
1653         } else
1654                 /*
1655                  * check if the given destination can be reached through
1656                  * a iscsi capable NetXtreme2 device
1657                  */
1658                 hba = bnx2i_check_route(dst_addr);
1659
1660         if (!hba) {
1661                 rc = -ENOMEM;
1662                 goto check_busy;
1663         }
1664
1665         cnic = hba->cnic;
1666         ep = bnx2i_alloc_ep(hba);
1667         if (!ep) {
1668                 rc = -ENOMEM;
1669                 goto check_busy;
1670         }
1671         bnx2i_ep = ep->dd_data;
1672
1673         mutex_lock(&hba->net_dev_lock);
1674         if (bnx2i_adapter_ready(hba)) {
1675                 rc = -EPERM;
1676                 goto net_if_down;
1677         }
1678
1679         bnx2i_ep->num_active_cmds = 0;
1680         iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1681         if (iscsi_cid == -1) {
1682                 printk(KERN_ALERT "alloc_ep: unable to allocate iscsi cid\n");
1683                 rc = -ENOMEM;
1684                 goto iscsi_cid_err;
1685         }
1686         bnx2i_ep->hba_age = hba->age;
1687
1688         rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1689         if (rc != 0) {
1690                 printk(KERN_ALERT "bnx2i: ep_conn, alloc QP resc error\n");
1691                 rc = -ENOMEM;
1692                 goto qp_resc_err;
1693         }
1694
1695         bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1696         bnx2i_ep->state = EP_STATE_OFLD_START;
1697         bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1698
1699         init_timer(&bnx2i_ep->ofld_timer);
1700         bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1701         bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1702         bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1703         add_timer(&bnx2i_ep->ofld_timer);
1704
1705         bnx2i_send_conn_ofld_req(hba, bnx2i_ep);
1706
1707         /* Wait for CNIC hardware to setup conn context and return 'cid' */
1708         wait_event_interruptible(bnx2i_ep->ofld_wait,
1709                                  bnx2i_ep->state != EP_STATE_OFLD_START);
1710
1711         if (signal_pending(current))
1712                 flush_signals(current);
1713         del_timer_sync(&bnx2i_ep->ofld_timer);
1714
1715         bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1716
1717         if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1718                 rc = -ENOSPC;
1719                 goto conn_failed;
1720         }
1721
1722         rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1723                              iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1724         if (rc) {
1725                 rc = -EINVAL;
1726                 goto conn_failed;
1727         }
1728
1729         bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1730         bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1731         clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1732
1733         memset(&saddr, 0, sizeof(saddr));
1734         if (dst_addr->sa_family == AF_INET) {
1735                 desti = (struct sockaddr_in *) dst_addr;
1736                 saddr.remote.v4 = *desti;
1737                 saddr.local.v4.sin_family = desti->sin_family;
1738         } else if (dst_addr->sa_family == AF_INET6) {
1739                 desti6 = (struct sockaddr_in6 *) dst_addr;
1740                 saddr.remote.v6 = *desti6;
1741                 saddr.local.v6.sin6_family = desti6->sin6_family;
1742         }
1743
1744         bnx2i_ep->timestamp = jiffies;
1745         bnx2i_ep->state = EP_STATE_CONNECT_START;
1746         if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1747                 rc = -EINVAL;
1748                 goto conn_failed;
1749         } else
1750                 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1751
1752         if (rc)
1753                 goto release_ep;
1754
1755         if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
1756                 goto release_ep;
1757         mutex_unlock(&hba->net_dev_lock);
1758         return ep;
1759
1760 release_ep:
1761         if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1762                 mutex_unlock(&hba->net_dev_lock);
1763                 return ERR_PTR(rc);
1764         }
1765 conn_failed:
1766 net_if_down:
1767 iscsi_cid_err:
1768         bnx2i_free_qp_resc(hba, bnx2i_ep);
1769 qp_resc_err:
1770         bnx2i_free_ep(ep);
1771         mutex_unlock(&hba->net_dev_lock);
1772 check_busy:
1773         bnx2i_unreg_dev_all();
1774         return ERR_PTR(rc);
1775 }
1776
1777
1778 /**
1779  * bnx2i_ep_poll - polls for TCP connection establishement
1780  * @ep:                 TCP connection (endpoint) handle
1781  * @timeout_ms:         timeout value in milli secs
1782  *
1783  * polls for TCP connect request to complete
1784  */
1785 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1786 {
1787         struct bnx2i_endpoint *bnx2i_ep;
1788         int rc = 0;
1789
1790         bnx2i_ep = ep->dd_data;
1791         if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1792             (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1793             (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1794                 return -1;
1795         if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1796                 return 1;
1797
1798         rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1799                                               ((bnx2i_ep->state ==
1800                                                 EP_STATE_OFLD_FAILED) ||
1801                                                (bnx2i_ep->state ==
1802                                                 EP_STATE_CONNECT_FAILED) ||
1803                                                (bnx2i_ep->state ==
1804                                                 EP_STATE_CONNECT_COMPL)),
1805                                               msecs_to_jiffies(timeout_ms));
1806         if (!rc || (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1807                 rc = -1;
1808
1809         if (rc > 0)
1810                 return 1;
1811         else if (!rc)
1812                 return 0;       /* timeout */
1813         else
1814                 return rc;
1815 }
1816
1817
1818 /**
1819  * bnx2i_ep_tcp_conn_active - check EP state transition
1820  * @ep:         endpoint pointer
1821  *
1822  * check if underlying TCP connection is active
1823  */
1824 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1825 {
1826         int ret;
1827         int cnic_dev_10g = 0;
1828
1829         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1830                 cnic_dev_10g = 1;
1831
1832         switch (bnx2i_ep->state) {
1833         case EP_STATE_CONNECT_START:
1834         case EP_STATE_CLEANUP_FAILED:
1835         case EP_STATE_OFLD_FAILED:
1836         case EP_STATE_DISCONN_TIMEDOUT:
1837                 ret = 0;
1838                 break;
1839         case EP_STATE_CONNECT_COMPL:
1840         case EP_STATE_ULP_UPDATE_START:
1841         case EP_STATE_ULP_UPDATE_COMPL:
1842         case EP_STATE_TCP_FIN_RCVD:
1843         case EP_STATE_ULP_UPDATE_FAILED:
1844                 ret = 1;
1845                 break;
1846         case EP_STATE_TCP_RST_RCVD:
1847                 ret = 0;
1848                 break;
1849         case EP_STATE_CONNECT_FAILED:
1850                 if (cnic_dev_10g)
1851                         ret = 1;
1852                 else
1853                         ret = 0;
1854                 break;
1855         default:
1856                 ret = 0;
1857         }
1858
1859         return ret;
1860 }
1861
1862
1863 /**
1864  * bnx2i_ep_disconnect - executes TCP connection teardown process
1865  * @ep:         TCP connection (endpoint) handle
1866  *
1867  * executes  TCP connection teardown process
1868  */
1869 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
1870 {
1871         struct bnx2i_endpoint *bnx2i_ep;
1872         struct bnx2i_conn *bnx2i_conn = NULL;
1873         struct iscsi_session *session = NULL;
1874         struct iscsi_conn *conn;
1875         struct cnic_dev *cnic;
1876         struct bnx2i_hba *hba;
1877
1878         bnx2i_ep = ep->dd_data;
1879
1880         /* driver should not attempt connection cleanup until TCP_CONNECT
1881          * completes either successfully or fails. Timeout is 9-secs, so
1882          * wait for it to complete
1883          */
1884         while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
1885                 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
1886                 msleep(250);
1887
1888         if (bnx2i_ep->conn) {
1889                 bnx2i_conn = bnx2i_ep->conn;
1890                 conn = bnx2i_conn->cls_conn->dd_data;
1891                 session = conn->session;
1892
1893                 iscsi_suspend_queue(conn);
1894         }
1895
1896         hba = bnx2i_ep->hba;
1897         if (bnx2i_ep->state == EP_STATE_IDLE)
1898                 goto return_bnx2i_ep;
1899         cnic = hba->cnic;
1900
1901         mutex_lock(&hba->net_dev_lock);
1902
1903         if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
1904                 goto free_resc;
1905         if (bnx2i_ep->hba_age != hba->age)
1906                 goto free_resc;
1907
1908         if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
1909                 goto destory_conn;
1910
1911         bnx2i_ep->state = EP_STATE_DISCONN_START;
1912
1913         init_timer(&bnx2i_ep->ofld_timer);
1914         bnx2i_ep->ofld_timer.expires = 10*HZ + jiffies;
1915         bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1916         bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1917         add_timer(&bnx2i_ep->ofld_timer);
1918
1919         if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1920                 int close = 0;
1921
1922                 if (session) {
1923                         spin_lock_bh(&session->lock);
1924                         if (session->state == ISCSI_STATE_LOGGING_OUT)
1925                                 close = 1;
1926                         spin_unlock_bh(&session->lock);
1927                 }
1928                 if (close)
1929                         cnic->cm_close(bnx2i_ep->cm_sk);
1930                 else
1931                         cnic->cm_abort(bnx2i_ep->cm_sk);
1932         } else
1933                 goto free_resc;
1934
1935         /* wait for option-2 conn teardown */
1936         wait_event_interruptible(bnx2i_ep->ofld_wait,
1937                                  bnx2i_ep->state != EP_STATE_DISCONN_START);
1938
1939         if (signal_pending(current))
1940                 flush_signals(current);
1941         del_timer_sync(&bnx2i_ep->ofld_timer);
1942
1943 destory_conn:
1944         if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1945                 mutex_unlock(&hba->net_dev_lock);
1946                 return;
1947         }
1948 free_resc:
1949         mutex_unlock(&hba->net_dev_lock);
1950         bnx2i_free_qp_resc(hba, bnx2i_ep);
1951 return_bnx2i_ep:
1952         if (bnx2i_conn)
1953                 bnx2i_conn->ep = NULL;
1954
1955         bnx2i_free_ep(ep);
1956
1957         if (!hba->ofld_conns_active)
1958                 bnx2i_unreg_dev_all();
1959 }
1960
1961
1962 /**
1963  * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
1964  * @buf:        pointer to buffer containing iscsi path message
1965  *
1966  */
1967 static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
1968 {
1969         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1970         char *buf = (char *) params;
1971         u16 len = sizeof(*params);
1972
1973         /* handled by cnic driver */
1974         hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
1975                                      len);
1976
1977         return 0;
1978 }
1979
1980
1981 /*
1982  * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
1983  * used while registering with the scsi host and iSCSI transport module.
1984  */
1985 static struct scsi_host_template bnx2i_host_template = {
1986         .module                 = THIS_MODULE,
1987         .name                   = "Broadcom Offload iSCSI Initiator",
1988         .proc_name              = "bnx2i",
1989         .queuecommand           = iscsi_queuecommand,
1990         .eh_abort_handler       = iscsi_eh_abort,
1991         .eh_device_reset_handler = iscsi_eh_device_reset,
1992         .eh_target_reset_handler = iscsi_eh_recover_target,
1993         .change_queue_depth     = iscsi_change_queue_depth,
1994         .can_queue              = 1024,
1995         .max_sectors            = 127,
1996         .cmd_per_lun            = 32,
1997         .this_id                = -1,
1998         .use_clustering         = ENABLE_CLUSTERING,
1999         .sg_tablesize           = ISCSI_MAX_BDS_PER_CMD,
2000         .shost_attrs            = bnx2i_dev_attributes,
2001 };
2002
2003 struct iscsi_transport bnx2i_iscsi_transport = {
2004         .owner                  = THIS_MODULE,
2005         .name                   = "bnx2i",
2006         .caps                   = CAP_RECOVERY_L0 | CAP_HDRDGST |
2007                                   CAP_MULTI_R2T | CAP_DATADGST |
2008                                   CAP_DATA_PATH_OFFLOAD,
2009         .param_mask             = ISCSI_MAX_RECV_DLENGTH |
2010                                   ISCSI_MAX_XMIT_DLENGTH |
2011                                   ISCSI_HDRDGST_EN |
2012                                   ISCSI_DATADGST_EN |
2013                                   ISCSI_INITIAL_R2T_EN |
2014                                   ISCSI_MAX_R2T |
2015                                   ISCSI_IMM_DATA_EN |
2016                                   ISCSI_FIRST_BURST |
2017                                   ISCSI_MAX_BURST |
2018                                   ISCSI_PDU_INORDER_EN |
2019                                   ISCSI_DATASEQ_INORDER_EN |
2020                                   ISCSI_ERL |
2021                                   ISCSI_CONN_PORT |
2022                                   ISCSI_CONN_ADDRESS |
2023                                   ISCSI_EXP_STATSN |
2024                                   ISCSI_PERSISTENT_PORT |
2025                                   ISCSI_PERSISTENT_ADDRESS |
2026                                   ISCSI_TARGET_NAME | ISCSI_TPGT |
2027                                   ISCSI_USERNAME | ISCSI_PASSWORD |
2028                                   ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
2029                                   ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
2030                                   ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO |
2031                                   ISCSI_PING_TMO | ISCSI_RECV_TMO |
2032                                   ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
2033         .host_param_mask        = ISCSI_HOST_HWADDRESS | ISCSI_HOST_NETDEV_NAME,
2034         .create_session         = bnx2i_session_create,
2035         .destroy_session        = bnx2i_session_destroy,
2036         .create_conn            = bnx2i_conn_create,
2037         .bind_conn              = bnx2i_conn_bind,
2038         .destroy_conn           = bnx2i_conn_destroy,
2039         .set_param              = iscsi_set_param,
2040         .get_conn_param         = bnx2i_conn_get_param,
2041         .get_session_param      = iscsi_session_get_param,
2042         .get_host_param         = bnx2i_host_get_param,
2043         .start_conn             = bnx2i_conn_start,
2044         .stop_conn              = iscsi_conn_stop,
2045         .send_pdu               = iscsi_conn_send_pdu,
2046         .xmit_task              = bnx2i_task_xmit,
2047         .get_stats              = bnx2i_conn_get_stats,
2048         /* TCP connect - disconnect - option-2 interface calls */
2049         .ep_connect             = bnx2i_ep_connect,
2050         .ep_poll                = bnx2i_ep_poll,
2051         .ep_disconnect          = bnx2i_ep_disconnect,
2052         .set_path               = bnx2i_nl_set_path,
2053         /* Error recovery timeout call */
2054         .session_recovery_timedout = iscsi_session_recovery_timedout,
2055         .cleanup_task           = bnx2i_cleanup_task,
2056 };