89e84c302aa04168768d65d9a1d6448a9ec4b029
[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                 /* Anil */
489                 task->hdr = &cmd->hdr;
490                 task->hdr_max = sizeof(struct iscsi_hdr);
491
492                 if (bnx2i_alloc_bdt(hba, session, cmd))
493                         goto free_bdts;
494         }
495
496         return 0;
497
498 free_bdts:
499         bnx2i_destroy_cmd_pool(hba, session);
500         return -ENOMEM;
501 }
502
503
504 /**
505  * bnx2i_setup_mp_bdt - allocate BD table resources
506  * @hba:        pointer to adapter structure
507  *
508  * Allocate memory for dummy buffer and associated BD
509  * table to be used by middle path (MP) requests
510  */
511 static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
512 {
513         int rc = 0;
514         struct iscsi_bd *mp_bdt;
515         u64 addr;
516
517         hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
518                                             &hba->mp_bd_dma, GFP_KERNEL);
519         if (!hba->mp_bd_tbl) {
520                 printk(KERN_ERR "unable to allocate Middle Path BDT\n");
521                 rc = -1;
522                 goto out;
523         }
524
525         hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
526                                                &hba->dummy_buf_dma, GFP_KERNEL);
527         if (!hba->dummy_buffer) {
528                 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
529                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
530                                   hba->mp_bd_tbl, hba->mp_bd_dma);
531                 hba->mp_bd_tbl = NULL;
532                 rc = -1;
533                 goto out;
534         }
535
536         mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
537         addr = (unsigned long) hba->dummy_buf_dma;
538         mp_bdt->buffer_addr_lo = addr & 0xffffffff;
539         mp_bdt->buffer_addr_hi = addr >> 32;
540         mp_bdt->buffer_length = PAGE_SIZE;
541         mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
542                         ISCSI_BD_FIRST_IN_BD_CHAIN;
543 out:
544         return rc;
545 }
546
547
548 /**
549  * bnx2i_free_mp_bdt - releases ITT back to free pool
550  * @hba:        pointer to adapter instance
551  *
552  * free MP dummy buffer and associated BD table
553  */
554 static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
555 {
556         if (hba->mp_bd_tbl) {
557                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
558                                   hba->mp_bd_tbl, hba->mp_bd_dma);
559                 hba->mp_bd_tbl = NULL;
560         }
561         if (hba->dummy_buffer) {
562                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
563                                   hba->dummy_buffer, hba->dummy_buf_dma);
564                 hba->dummy_buffer = NULL;
565         }
566                 return;
567 }
568
569 /**
570  * bnx2i_drop_session - notifies iscsid of connection error.
571  * @hba:        adapter instance pointer
572  * @session:    iscsi session pointer
573  *
574  * This notifies iscsid that there is a error, so it can initiate
575  * recovery.
576  *
577  * This relies on caller using the iscsi class iterator so the object
578  * is refcounted and does not disapper from under us.
579  */
580 void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
581 {
582         iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
583 }
584
585 /**
586  * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
587  * @hba:        pointer to adapter instance
588  * @ep:         pointer to endpoint (transport indentifier) structure
589  *
590  * EP destroy queue manager
591  */
592 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
593                                      struct bnx2i_endpoint *ep)
594 {
595         write_lock_bh(&hba->ep_rdwr_lock);
596         list_add_tail(&ep->link, &hba->ep_destroy_list);
597         write_unlock_bh(&hba->ep_rdwr_lock);
598         return 0;
599 }
600
601 /**
602  * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
603  *
604  * @hba:                pointer to adapter instance
605  * @ep:                 pointer to endpoint (transport indentifier) structure
606  *
607  * EP destroy queue manager
608  */
609 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
610                                      struct bnx2i_endpoint *ep)
611 {
612         write_lock_bh(&hba->ep_rdwr_lock);
613         list_del_init(&ep->link);
614         write_unlock_bh(&hba->ep_rdwr_lock);
615
616         return 0;
617 }
618
619 /**
620  * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
621  * @hba:        pointer to adapter instance
622  * @ep:         pointer to endpoint (transport indentifier) structure
623  *
624  * pending conn offload completion queue manager
625  */
626 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
627                                   struct bnx2i_endpoint *ep)
628 {
629         write_lock_bh(&hba->ep_rdwr_lock);
630         list_add_tail(&ep->link, &hba->ep_ofld_list);
631         write_unlock_bh(&hba->ep_rdwr_lock);
632         return 0;
633 }
634
635 /**
636  * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
637  * @hba:                pointer to adapter instance
638  * @ep:                 pointer to endpoint (transport indentifier) structure
639  *
640  * pending conn offload completion queue manager
641  */
642 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
643                                   struct bnx2i_endpoint *ep)
644 {
645         write_lock_bh(&hba->ep_rdwr_lock);
646         list_del_init(&ep->link);
647         write_unlock_bh(&hba->ep_rdwr_lock);
648         return 0;
649 }
650
651
652 /**
653  * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
654  *
655  * @hba:                pointer to adapter instance
656  * @iscsi_cid:          iscsi context ID to find
657  *
658  */
659 struct bnx2i_endpoint *
660 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
661 {
662         struct list_head *list;
663         struct list_head *tmp;
664         struct bnx2i_endpoint *ep;
665
666         read_lock_bh(&hba->ep_rdwr_lock);
667         list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
668                 ep = (struct bnx2i_endpoint *)list;
669
670                 if (ep->ep_iscsi_cid == iscsi_cid)
671                         break;
672                 ep = NULL;
673         }
674         read_unlock_bh(&hba->ep_rdwr_lock);
675
676         if (!ep)
677                 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
678         return ep;
679 }
680
681
682 /**
683  * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
684  * @hba:                pointer to adapter instance
685  * @iscsi_cid:          iscsi context ID to find
686  *
687  */
688 struct bnx2i_endpoint *
689 bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
690 {
691         struct list_head *list;
692         struct list_head *tmp;
693         struct bnx2i_endpoint *ep;
694
695         read_lock_bh(&hba->ep_rdwr_lock);
696         list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
697                 ep = (struct bnx2i_endpoint *)list;
698
699                 if (ep->ep_iscsi_cid == iscsi_cid)
700                         break;
701                 ep = NULL;
702         }
703         read_unlock_bh(&hba->ep_rdwr_lock);
704
705         if (!ep)
706                 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
707
708         return ep;
709 }
710
711 /**
712  * bnx2i_setup_host_queue_size - assigns shost->can_queue param
713  * @hba:        pointer to adapter instance
714  * @shost:      scsi host pointer
715  *
716  * Initializes 'can_queue' parameter based on how many outstanding commands
717  *      the device can handle. Each device 5708/5709/57710 has different
718  *      capabilities
719  */
720 static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
721                                         struct Scsi_Host *shost)
722 {
723         if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
724                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
725         else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
726                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
727         else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
728                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
729         else
730                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
731 }
732
733
734 /**
735  * bnx2i_alloc_hba - allocate and init adapter instance
736  * @cnic:       cnic device pointer
737  *
738  * allocate & initialize adapter structure and call other
739  *      support routines to do per adapter initialization
740  */
741 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
742 {
743         struct Scsi_Host *shost;
744         struct bnx2i_hba *hba;
745
746         shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
747         if (!shost)
748                 return NULL;
749         shost->dma_boundary = cnic->pcidev->dma_mask;
750         shost->transportt = bnx2i_scsi_xport_template;
751         shost->max_id = ISCSI_MAX_CONNS_PER_HBA;
752         shost->max_channel = 0;
753         shost->max_lun = 512;
754         shost->max_cmd_len = 16;
755
756         hba = iscsi_host_priv(shost);
757         hba->shost = shost;
758         hba->netdev = cnic->netdev;
759         /* Get PCI related information and update hba struct members */
760         hba->pcidev = cnic->pcidev;
761         pci_dev_get(hba->pcidev);
762         hba->pci_did = hba->pcidev->device;
763         hba->pci_vid = hba->pcidev->vendor;
764         hba->pci_sdid = hba->pcidev->subsystem_device;
765         hba->pci_svid = hba->pcidev->subsystem_vendor;
766         hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
767         hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
768         bnx2i_identify_device(hba);
769
770         bnx2i_identify_device(hba);
771         bnx2i_setup_host_queue_size(hba, shost);
772
773         if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
774                 hba->regview = ioremap_nocache(hba->netdev->base_addr,
775                                                BNX2_MQ_CONFIG2);
776                 if (!hba->regview)
777                         goto ioreg_map_err;
778         } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
779                 hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096);
780                 if (!hba->regview)
781                         goto ioreg_map_err;
782         }
783
784         if (bnx2i_setup_mp_bdt(hba))
785                 goto mp_bdt_mem_err;
786
787         INIT_LIST_HEAD(&hba->ep_ofld_list);
788         INIT_LIST_HEAD(&hba->ep_destroy_list);
789         rwlock_init(&hba->ep_rdwr_lock);
790
791         hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
792
793         /* different values for 5708/5709/57710 */
794         hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
795
796         if (bnx2i_setup_free_cid_que(hba))
797                 goto cid_que_err;
798
799         /* SQ/RQ/CQ size can be changed via sysfx interface */
800         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
801                 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
802                         hba->max_sqes = sq_size;
803                 else
804                         hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
805         } else {        /* 5706/5708/5709 */
806                 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
807                         hba->max_sqes = sq_size;
808                 else
809                         hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
810         }
811
812         hba->max_rqes = rq_size;
813         hba->max_cqes = hba->max_sqes + rq_size;
814         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
815                 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
816                         hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
817         } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
818                 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
819
820         hba->num_ccell = hba->max_sqes / 2;
821
822         spin_lock_init(&hba->lock);
823         mutex_init(&hba->net_dev_lock);
824
825         if (iscsi_host_add(shost, &hba->pcidev->dev))
826                 goto free_dump_mem;
827         return hba;
828
829 free_dump_mem:
830         bnx2i_release_free_cid_que(hba);
831 cid_que_err:
832         bnx2i_free_mp_bdt(hba);
833 mp_bdt_mem_err:
834         if (hba->regview) {
835                 iounmap(hba->regview);
836                 hba->regview = NULL;
837         }
838 ioreg_map_err:
839         pci_dev_put(hba->pcidev);
840         scsi_host_put(shost);
841         return NULL;
842 }
843
844 /**
845  * bnx2i_free_hba- releases hba structure and resources held by the adapter
846  * @hba:        pointer to adapter instance
847  *
848  * free adapter structure and call various cleanup routines.
849  */
850 void bnx2i_free_hba(struct bnx2i_hba *hba)
851 {
852         struct Scsi_Host *shost = hba->shost;
853
854         iscsi_host_remove(shost);
855         INIT_LIST_HEAD(&hba->ep_ofld_list);
856         INIT_LIST_HEAD(&hba->ep_destroy_list);
857         pci_dev_put(hba->pcidev);
858
859         if (hba->regview) {
860                 iounmap(hba->regview);
861                 hba->regview = NULL;
862         }
863         bnx2i_free_mp_bdt(hba);
864         bnx2i_release_free_cid_que(hba);
865         iscsi_host_free(shost);
866 }
867
868 /**
869  * bnx2i_conn_free_login_resources - free DMA resources used for login process
870  * @hba:                pointer to adapter instance
871  * @bnx2i_conn:         iscsi connection pointer
872  *
873  * Login related resources, mostly BDT & payload DMA memory is freed
874  */
875 static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
876                                             struct bnx2i_conn *bnx2i_conn)
877 {
878         if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
879                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
880                                   bnx2i_conn->gen_pdu.resp_bd_tbl,
881                                   bnx2i_conn->gen_pdu.resp_bd_dma);
882                 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
883         }
884
885         if (bnx2i_conn->gen_pdu.req_bd_tbl) {
886                 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
887                                   bnx2i_conn->gen_pdu.req_bd_tbl,
888                                   bnx2i_conn->gen_pdu.req_bd_dma);
889                 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
890         }
891
892         if (bnx2i_conn->gen_pdu.resp_buf) {
893                 dma_free_coherent(&hba->pcidev->dev,
894                                   ISCSI_DEF_MAX_RECV_SEG_LEN,
895                                   bnx2i_conn->gen_pdu.resp_buf,
896                                   bnx2i_conn->gen_pdu.resp_dma_addr);
897                 bnx2i_conn->gen_pdu.resp_buf = NULL;
898         }
899
900         if (bnx2i_conn->gen_pdu.req_buf) {
901                 dma_free_coherent(&hba->pcidev->dev,
902                                   ISCSI_DEF_MAX_RECV_SEG_LEN,
903                                   bnx2i_conn->gen_pdu.req_buf,
904                                   bnx2i_conn->gen_pdu.req_dma_addr);
905                 bnx2i_conn->gen_pdu.req_buf = NULL;
906         }
907 }
908
909 /**
910  * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
911  * @hba:                pointer to adapter instance
912  * @bnx2i_conn:         iscsi connection pointer
913  *
914  * Mgmt task DNA resources are allocated in this routine.
915  */
916 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
917                                             struct bnx2i_conn *bnx2i_conn)
918 {
919         /* Allocate memory for login request/response buffers */
920         bnx2i_conn->gen_pdu.req_buf =
921                 dma_alloc_coherent(&hba->pcidev->dev,
922                                    ISCSI_DEF_MAX_RECV_SEG_LEN,
923                                    &bnx2i_conn->gen_pdu.req_dma_addr,
924                                    GFP_KERNEL);
925         if (bnx2i_conn->gen_pdu.req_buf == NULL)
926                 goto login_req_buf_failure;
927
928         bnx2i_conn->gen_pdu.req_buf_size = 0;
929         bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
930
931         bnx2i_conn->gen_pdu.resp_buf =
932                 dma_alloc_coherent(&hba->pcidev->dev,
933                                    ISCSI_DEF_MAX_RECV_SEG_LEN,
934                                    &bnx2i_conn->gen_pdu.resp_dma_addr,
935                                    GFP_KERNEL);
936         if (bnx2i_conn->gen_pdu.resp_buf == NULL)
937                 goto login_resp_buf_failure;
938
939         bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
940         bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
941
942         bnx2i_conn->gen_pdu.req_bd_tbl =
943                 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
944                                    &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
945         if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
946                 goto login_req_bd_tbl_failure;
947
948         bnx2i_conn->gen_pdu.resp_bd_tbl =
949                 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
950                                    &bnx2i_conn->gen_pdu.resp_bd_dma,
951                                    GFP_KERNEL);
952         if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
953                 goto login_resp_bd_tbl_failure;
954
955         return 0;
956
957 login_resp_bd_tbl_failure:
958         dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
959                           bnx2i_conn->gen_pdu.req_bd_tbl,
960                           bnx2i_conn->gen_pdu.req_bd_dma);
961         bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
962
963 login_req_bd_tbl_failure:
964         dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
965                           bnx2i_conn->gen_pdu.resp_buf,
966                           bnx2i_conn->gen_pdu.resp_dma_addr);
967         bnx2i_conn->gen_pdu.resp_buf = NULL;
968 login_resp_buf_failure:
969         dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
970                           bnx2i_conn->gen_pdu.req_buf,
971                           bnx2i_conn->gen_pdu.req_dma_addr);
972         bnx2i_conn->gen_pdu.req_buf = NULL;
973 login_req_buf_failure:
974         iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
975                           "login resource alloc failed!!\n");
976         return -ENOMEM;
977
978 }
979
980
981 /**
982  * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
983  * @bnx2i_conn:         iscsi connection pointer
984  *
985  * Allocates buffers and BD tables before shipping requests to cnic
986  *      for PDUs prepared by 'iscsid' daemon
987  */
988 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
989 {
990         struct iscsi_bd *bd_tbl;
991
992         bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
993
994         bd_tbl->buffer_addr_hi =
995                 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
996         bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
997         bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
998                                 bnx2i_conn->gen_pdu.req_buf;
999         bd_tbl->reserved0 = 0;
1000         bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1001                         ISCSI_BD_FIRST_IN_BD_CHAIN;
1002
1003         bd_tbl = (struct iscsi_bd  *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1004         bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1005         bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1006         bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1007         bd_tbl->reserved0 = 0;
1008         bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1009                         ISCSI_BD_FIRST_IN_BD_CHAIN;
1010 }
1011
1012
1013 /**
1014  * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1015  * @task:       transport layer task pointer
1016  *
1017  * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1018  *      Nop-out and Logout requests flow through this path.
1019  */
1020 static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1021 {
1022         struct bnx2i_cmd *cmd = task->dd_data;
1023         struct bnx2i_conn *bnx2i_conn = cmd->conn;
1024         int rc = 0;
1025         char *buf;
1026         int data_len;
1027
1028         bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1029         switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1030         case ISCSI_OP_LOGIN:
1031                 bnx2i_send_iscsi_login(bnx2i_conn, task);
1032                 break;
1033         case ISCSI_OP_NOOP_OUT:
1034                 data_len = bnx2i_conn->gen_pdu.req_buf_size;
1035                 buf = bnx2i_conn->gen_pdu.req_buf;
1036                 if (data_len)
1037                         rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1038                                                      RESERVED_ITT,
1039                                                      buf, data_len, 1);
1040                 else
1041                         rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1042                                                      RESERVED_ITT,
1043                                                      NULL, 0, 1);
1044                 break;
1045         case ISCSI_OP_LOGOUT:
1046                 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1047                 break;
1048         case ISCSI_OP_SCSI_TMFUNC:
1049                 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1050                 break;
1051         default:
1052                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1053                                   "send_gen: unsupported op 0x%x\n",
1054                                   task->hdr->opcode);
1055         }
1056         return rc;
1057 }
1058
1059
1060 /**********************************************************************
1061  *              SCSI-ML Interface
1062  **********************************************************************/
1063
1064 /**
1065  * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1066  * @sc:         SCSI-ML command pointer
1067  * @cmd:        iscsi cmd pointer
1068  */
1069 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1070 {
1071         u32 dword;
1072         int lpcnt;
1073         u8 *srcp;
1074         u32 *dstp;
1075         u32 scsi_lun[2];
1076
1077         int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1078         cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1079         cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1080
1081         lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1082         srcp = (u8 *) sc->cmnd;
1083         dstp = (u32 *) cmd->req.cdb;
1084         while (lpcnt--) {
1085                 memcpy(&dword, (const void *) srcp, 4);
1086                 *dstp = cpu_to_be32(dword);
1087                 srcp += 4;
1088                 dstp++;
1089         }
1090         if (sc->cmd_len & 0x3) {
1091                 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1092                 *dstp = cpu_to_be32(dword);
1093         }
1094 }
1095
1096 static void bnx2i_cleanup_task(struct iscsi_task *task)
1097 {
1098         struct iscsi_conn *conn = task->conn;
1099         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1100         struct bnx2i_hba *hba = bnx2i_conn->hba;
1101
1102         /*
1103          * mgmt task or cmd was never sent to us to transmit.
1104          */
1105         if (!task->sc || task->state == ISCSI_TASK_PENDING)
1106                 return;
1107         /*
1108          * need to clean-up task context to claim dma buffers
1109          */
1110         if (task->state == ISCSI_TASK_ABRT_TMF) {
1111                 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1112
1113                 spin_unlock_bh(&conn->session->lock);
1114                 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1115                                 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1116                 spin_lock_bh(&conn->session->lock);
1117         }
1118         bnx2i_iscsi_unmap_sg_list(task->dd_data);
1119 }
1120
1121 /**
1122  * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1123  * @conn:       transport layer conn structure pointer
1124  * @task:       transport layer command structure pointer
1125  */
1126 static int
1127 bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1128 {
1129         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1130         struct bnx2i_cmd *cmd = task->dd_data;
1131
1132         memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1133
1134         bnx2i_setup_cmd_wqe_template(cmd);
1135         bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1136         if (task->data_count) {
1137                 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1138                        task->data_count);
1139                 bnx2i_conn->gen_pdu.req_wr_ptr =
1140                         bnx2i_conn->gen_pdu.req_buf + task->data_count;
1141         }
1142         cmd->conn = conn->dd_data;
1143         cmd->scsi_cmd = NULL;
1144         return bnx2i_iscsi_send_generic_request(task);
1145 }
1146
1147 /**
1148  * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1149  * @task:       transport layer command structure pointer
1150  *
1151  * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1152  */
1153 static int bnx2i_task_xmit(struct iscsi_task *task)
1154 {
1155         struct iscsi_conn *conn = task->conn;
1156         struct iscsi_session *session = conn->session;
1157         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1158         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1159         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1160         struct scsi_cmnd *sc = task->sc;
1161         struct bnx2i_cmd *cmd = task->dd_data;
1162         struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr;
1163
1164         /*
1165          * If there is no scsi_cmnd this must be a mgmt task
1166          */
1167         if (!sc)
1168                 return bnx2i_mtask_xmit(conn, task);
1169
1170         bnx2i_setup_cmd_wqe_template(cmd);
1171         cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1172         cmd->conn = bnx2i_conn;
1173         cmd->scsi_cmd = sc;
1174         cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1175         cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1176
1177         bnx2i_iscsi_map_sg_list(cmd);
1178         bnx2i_cpy_scsi_cdb(sc, cmd);
1179
1180         cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1181         if (sc->sc_data_direction == DMA_TO_DEVICE) {
1182                 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1183                 cmd->req.itt = task->itt |
1184                         (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1185                 bnx2i_setup_write_cmd_bd_info(task);
1186         } else {
1187                 if (scsi_bufflen(sc))
1188                         cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1189                 cmd->req.itt = task->itt |
1190                         (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1191         }
1192
1193         cmd->req.num_bds = cmd->io_tbl.bd_valid;
1194         if (!cmd->io_tbl.bd_valid) {
1195                 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1196                 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1197                 cmd->req.num_bds = 1;
1198         }
1199
1200         bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1201         return 0;
1202 }
1203
1204 /**
1205  * bnx2i_session_create - create a new iscsi session
1206  * @cmds_max:           max commands supported
1207  * @qdepth:             scsi queue depth to support
1208  * @initial_cmdsn:      initial iscsi CMDSN to be used for this session
1209  *
1210  * Creates a new iSCSI session instance on given device.
1211  */
1212 static struct iscsi_cls_session *
1213 bnx2i_session_create(struct iscsi_endpoint *ep,
1214                      uint16_t cmds_max, uint16_t qdepth,
1215                      uint32_t initial_cmdsn)
1216 {
1217         struct Scsi_Host *shost;
1218         struct iscsi_cls_session *cls_session;
1219         struct bnx2i_hba *hba;
1220         struct bnx2i_endpoint *bnx2i_ep;
1221
1222         if (!ep) {
1223                 printk(KERN_ERR "bnx2i: missing ep.\n");
1224                 return NULL;
1225         }
1226
1227         bnx2i_ep = ep->dd_data;
1228         shost = bnx2i_ep->hba->shost;
1229         hba = iscsi_host_priv(shost);
1230         if (bnx2i_adapter_ready(hba))
1231                 return NULL;
1232
1233         /*
1234          * user can override hw limit as long as it is within
1235          * the min/max.
1236          */
1237         if (cmds_max > hba->max_sqes)
1238                 cmds_max = hba->max_sqes;
1239         else if (cmds_max < BNX2I_SQ_WQES_MIN)
1240                 cmds_max = BNX2I_SQ_WQES_MIN;
1241
1242         cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1243                                           cmds_max, 0, sizeof(struct bnx2i_cmd),
1244                                           initial_cmdsn, ISCSI_MAX_TARGET);
1245         if (!cls_session)
1246                 return NULL;
1247
1248         if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1249                 goto session_teardown;
1250         return cls_session;
1251
1252 session_teardown:
1253         iscsi_session_teardown(cls_session);
1254         return NULL;
1255 }
1256
1257
1258 /**
1259  * bnx2i_session_destroy - destroys iscsi session
1260  * @cls_session:        pointer to iscsi cls session
1261  *
1262  * Destroys previously created iSCSI session instance and releases
1263  *      all resources held by it
1264  */
1265 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1266 {
1267         struct iscsi_session *session = cls_session->dd_data;
1268         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1269         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1270
1271         bnx2i_destroy_cmd_pool(hba, session);
1272         iscsi_session_teardown(cls_session);
1273 }
1274
1275
1276 /**
1277  * bnx2i_conn_create - create iscsi connection instance
1278  * @cls_session:        pointer to iscsi cls session
1279  * @cid:                iscsi cid as per rfc (not NX2's CID terminology)
1280  *
1281  * Creates a new iSCSI connection instance for a given session
1282  */
1283 static struct iscsi_cls_conn *
1284 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1285 {
1286         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1287         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1288         struct bnx2i_conn *bnx2i_conn;
1289         struct iscsi_cls_conn *cls_conn;
1290         struct iscsi_conn *conn;
1291
1292         cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1293                                     cid);
1294         if (!cls_conn)
1295                 return NULL;
1296         conn = cls_conn->dd_data;
1297
1298         bnx2i_conn = conn->dd_data;
1299         bnx2i_conn->cls_conn = cls_conn;
1300         bnx2i_conn->hba = hba;
1301         /* 'ep' ptr will be assigned in bind() call */
1302         bnx2i_conn->ep = NULL;
1303         init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1304
1305         if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1306                 iscsi_conn_printk(KERN_ALERT, conn,
1307                                   "conn_new: login resc alloc failed!!\n");
1308                 goto free_conn;
1309         }
1310
1311         return cls_conn;
1312
1313 free_conn:
1314         iscsi_conn_teardown(cls_conn);
1315         return NULL;
1316 }
1317
1318 /**
1319  * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1320  * @cls_session:        pointer to iscsi cls session
1321  * @cls_conn:           pointer to iscsi cls conn
1322  * @transport_fd:       64-bit EP handle
1323  * @is_leading:         leading connection on this session?
1324  *
1325  * Binds together iSCSI session instance, iSCSI connection instance
1326  *      and the TCP connection. This routine returns error code if
1327  *      TCP connection does not belong on the device iSCSI sess/conn
1328  *      is bound
1329  */
1330 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1331                            struct iscsi_cls_conn *cls_conn,
1332                            uint64_t transport_fd, int is_leading)
1333 {
1334         struct iscsi_conn *conn = cls_conn->dd_data;
1335         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1336         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1337         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1338         struct bnx2i_endpoint *bnx2i_ep;
1339         struct iscsi_endpoint *ep;
1340         int ret_code;
1341
1342         ep = iscsi_lookup_endpoint(transport_fd);
1343         if (!ep)
1344                 return -EINVAL;
1345
1346         bnx2i_ep = ep->dd_data;
1347         if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1348             (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1349                 /* Peer disconnect via' FIN or RST */
1350                 return -EINVAL;
1351
1352         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1353                 return -EINVAL;
1354
1355         if (bnx2i_ep->hba != hba) {
1356                 /* Error - TCP connection does not belong to this device
1357                  */
1358                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1359                                   "conn bind, ep=0x%p (%s) does not",
1360                                   bnx2i_ep, bnx2i_ep->hba->netdev->name);
1361                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1362                                   "belong to hba (%s)\n",
1363                                   hba->netdev->name);
1364                 return -EEXIST;
1365         }
1366
1367         bnx2i_ep->conn = bnx2i_conn;
1368         bnx2i_conn->ep = bnx2i_ep;
1369         bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1370         bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1371
1372         ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1373                                                 bnx2i_ep->ep_iscsi_cid);
1374
1375         /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1376          * driver needs to explicitly replenish RQ index during setup.
1377          */
1378         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1379                 bnx2i_put_rq_buf(bnx2i_conn, 0);
1380
1381         bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1382         return ret_code;
1383 }
1384
1385
1386 /**
1387  * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1388  * @cls_conn:   pointer to iscsi cls conn
1389  *
1390  * Destroy an iSCSI connection instance and release memory resources held by
1391  *      this connection
1392  */
1393 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1394 {
1395         struct iscsi_conn *conn = cls_conn->dd_data;
1396         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1397         struct Scsi_Host *shost;
1398         struct bnx2i_hba *hba;
1399
1400         shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1401         hba = iscsi_host_priv(shost);
1402
1403         bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1404         iscsi_conn_teardown(cls_conn);
1405 }
1406
1407
1408 /**
1409  * bnx2i_conn_get_param - return iscsi connection parameter to caller
1410  * @cls_conn:   pointer to iscsi cls conn
1411  * @param:      parameter type identifier
1412  * @buf:        buffer pointer
1413  *
1414  * returns iSCSI connection parameters
1415  */
1416 static int bnx2i_conn_get_param(struct iscsi_cls_conn *cls_conn,
1417                                 enum iscsi_param param, char *buf)
1418 {
1419         struct iscsi_conn *conn = cls_conn->dd_data;
1420         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1421         int len = 0;
1422
1423         switch (param) {
1424         case ISCSI_PARAM_CONN_PORT:
1425                 if (bnx2i_conn->ep)
1426                         len = sprintf(buf, "%hu\n",
1427                                       bnx2i_conn->ep->cm_sk->dst_port);
1428                 break;
1429         case ISCSI_PARAM_CONN_ADDRESS:
1430                 if (bnx2i_conn->ep)
1431                         len = sprintf(buf, NIPQUAD_FMT "\n",
1432                                       NIPQUAD(bnx2i_conn->ep->cm_sk->dst_ip));
1433                 break;
1434         default:
1435                 return iscsi_conn_get_param(cls_conn, param, buf);
1436         }
1437
1438         return len;
1439 }
1440
1441 /**
1442  * bnx2i_host_get_param - returns host (adapter) related parameters
1443  * @shost:      scsi host pointer
1444  * @param:      parameter type identifier
1445  * @buf:        buffer pointer
1446  */
1447 static int bnx2i_host_get_param(struct Scsi_Host *shost,
1448                                 enum iscsi_host_param param, char *buf)
1449 {
1450         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1451         int len = 0;
1452
1453         switch (param) {
1454         case ISCSI_HOST_PARAM_HWADDRESS:
1455                 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1456                 break;
1457         case ISCSI_HOST_PARAM_NETDEV_NAME:
1458                 len = sprintf(buf, "%s\n", hba->netdev->name);
1459                 break;
1460         default:
1461                 return iscsi_host_get_param(shost, param, buf);
1462         }
1463         return len;
1464 }
1465
1466 /**
1467  * bnx2i_conn_start - completes iscsi connection migration to FFP
1468  * @cls_conn:   pointer to iscsi cls conn
1469  *
1470  * last call in FFP migration to handover iscsi conn to the driver
1471  */
1472 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1473 {
1474         struct iscsi_conn *conn = cls_conn->dd_data;
1475         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1476
1477         bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1478         bnx2i_update_iscsi_conn(conn);
1479
1480         /*
1481          * this should normally not sleep for a long time so it should
1482          * not disrupt the caller.
1483          */
1484         bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1485         bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1486         bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
1487         add_timer(&bnx2i_conn->ep->ofld_timer);
1488         /* update iSCSI context for this conn, wait for CNIC to complete */
1489         wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1490                         bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1491
1492         if (signal_pending(current))
1493                 flush_signals(current);
1494         del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1495
1496         iscsi_conn_start(cls_conn);
1497         return 0;
1498 }
1499
1500
1501 /**
1502  * bnx2i_conn_get_stats - returns iSCSI stats
1503  * @cls_conn:   pointer to iscsi cls conn
1504  * @stats:      pointer to iscsi statistic struct
1505  */
1506 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1507                                  struct iscsi_stats *stats)
1508 {
1509         struct iscsi_conn *conn = cls_conn->dd_data;
1510
1511         stats->txdata_octets = conn->txdata_octets;
1512         stats->rxdata_octets = conn->rxdata_octets;
1513         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1514         stats->dataout_pdus = conn->dataout_pdus_cnt;
1515         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1516         stats->datain_pdus = conn->datain_pdus_cnt;
1517         stats->r2t_pdus = conn->r2t_pdus_cnt;
1518         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1519         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1520         stats->custom_length = 3;
1521         strcpy(stats->custom[2].desc, "eh_abort_cnt");
1522         stats->custom[2].value = conn->eh_abort_cnt;
1523         stats->digest_err = 0;
1524         stats->timeout_err = 0;
1525         stats->custom_length = 0;
1526 }
1527
1528
1529 /**
1530  * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1531  * @dst_addr:   target IP address
1532  *
1533  * check if route resolves to BNX2 device
1534  */
1535 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1536 {
1537         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1538         struct bnx2i_hba *hba;
1539         struct cnic_dev *cnic = NULL;
1540
1541         bnx2i_reg_dev_all();
1542
1543         hba = get_adapter_list_head();
1544         if (hba && hba->cnic)
1545                 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1546         if (!cnic) {
1547                 printk(KERN_ALERT "bnx2i: no route,"
1548                        "can't connect using cnic\n");
1549                 goto no_nx2_route;
1550         }
1551         hba = bnx2i_find_hba_for_cnic(cnic);
1552         if (!hba)
1553                 goto no_nx2_route;
1554
1555         if (bnx2i_adapter_ready(hba)) {
1556                 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1557                 goto no_nx2_route;
1558         }
1559         if (hba->netdev->mtu > hba->mtu_supported) {
1560                 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1561                                   hba->netdev->name, hba->netdev->mtu);
1562                 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1563                                   hba->mtu_supported);
1564                 goto no_nx2_route;
1565         }
1566         return hba;
1567 no_nx2_route:
1568         return NULL;
1569 }
1570
1571
1572 /**
1573  * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1574  * @hba:        pointer to adapter instance
1575  * @ep:         endpoint (transport indentifier) structure
1576  *
1577  * destroys cm_sock structure and on chip iscsi context
1578  */
1579 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1580                                  struct bnx2i_endpoint *ep)
1581 {
1582         if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
1583                 hba->cnic->cm_destroy(ep->cm_sk);
1584
1585         if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
1586                 ep->state = EP_STATE_DISCONN_COMPL;
1587
1588         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1589             ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1590                 printk(KERN_ALERT "bnx2i - ERROR - please submit GRC Dump,"
1591                                   " NW/PCIe trace, driver msgs to developers"
1592                                   " for analysis\n");
1593                 return 1;
1594         }
1595
1596         ep->state = EP_STATE_CLEANUP_START;
1597         init_timer(&ep->ofld_timer);
1598         ep->ofld_timer.expires = 10*HZ + jiffies;
1599         ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1600         ep->ofld_timer.data = (unsigned long) ep;
1601         add_timer(&ep->ofld_timer);
1602
1603         bnx2i_ep_destroy_list_add(hba, ep);
1604
1605         /* destroy iSCSI context, wait for it to complete */
1606         bnx2i_send_conn_destroy(hba, ep);
1607         wait_event_interruptible(ep->ofld_wait,
1608                                  (ep->state != EP_STATE_CLEANUP_START));
1609
1610         if (signal_pending(current))
1611                 flush_signals(current);
1612         del_timer_sync(&ep->ofld_timer);
1613
1614         bnx2i_ep_destroy_list_del(hba, ep);
1615
1616         if (ep->state != EP_STATE_CLEANUP_CMPL)
1617                 /* should never happen */
1618                 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1619
1620         return 0;
1621 }
1622
1623
1624 /**
1625  * bnx2i_ep_connect - establish TCP connection to target portal
1626  * @shost:              scsi host
1627  * @dst_addr:           target IP address
1628  * @non_blocking:       blocking or non-blocking call
1629  *
1630  * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1631  *      with l5_core and the CNIC. This is a multi-step process of resolving
1632  *      route to target, create a iscsi connection context, handshaking with
1633  *      CNIC module to create/initialize the socket struct and finally
1634  *      sending down option-2 request to complete TCP 3-way handshake
1635  */
1636 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1637                                                struct sockaddr *dst_addr,
1638                                                int non_blocking)
1639 {
1640         u32 iscsi_cid = BNX2I_CID_RESERVED;
1641         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1642         struct sockaddr_in6 *desti6;
1643         struct bnx2i_endpoint *bnx2i_ep;
1644         struct bnx2i_hba *hba;
1645         struct cnic_dev *cnic;
1646         struct cnic_sockaddr saddr;
1647         struct iscsi_endpoint *ep;
1648         int rc = 0;
1649
1650         if (shost) {
1651                 /* driver is given scsi host to work with */
1652                 hba = iscsi_host_priv(shost);
1653                 /* Register the device with cnic if not already done so */
1654                 bnx2i_register_device(hba);
1655         } else
1656                 /*
1657                  * check if the given destination can be reached through
1658                  * a iscsi capable NetXtreme2 device
1659                  */
1660                 hba = bnx2i_check_route(dst_addr);
1661
1662         if (!hba) {
1663                 rc = -ENOMEM;
1664                 goto check_busy;
1665         }
1666
1667         cnic = hba->cnic;
1668         ep = bnx2i_alloc_ep(hba);
1669         if (!ep) {
1670                 rc = -ENOMEM;
1671                 goto check_busy;
1672         }
1673         bnx2i_ep = ep->dd_data;
1674
1675         mutex_lock(&hba->net_dev_lock);
1676         if (bnx2i_adapter_ready(hba)) {
1677                 rc = -EPERM;
1678                 goto net_if_down;
1679         }
1680
1681         bnx2i_ep->num_active_cmds = 0;
1682         iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1683         if (iscsi_cid == -1) {
1684                 printk(KERN_ALERT "alloc_ep: unable to allocate iscsi cid\n");
1685                 rc = -ENOMEM;
1686                 goto iscsi_cid_err;
1687         }
1688         bnx2i_ep->hba_age = hba->age;
1689
1690         rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1691         if (rc != 0) {
1692                 printk(KERN_ALERT "bnx2i: ep_conn, alloc QP resc error\n");
1693                 rc = -ENOMEM;
1694                 goto qp_resc_err;
1695         }
1696
1697         bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1698         bnx2i_ep->state = EP_STATE_OFLD_START;
1699         bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1700
1701         init_timer(&bnx2i_ep->ofld_timer);
1702         bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1703         bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1704         bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1705         add_timer(&bnx2i_ep->ofld_timer);
1706
1707         bnx2i_send_conn_ofld_req(hba, bnx2i_ep);
1708
1709         /* Wait for CNIC hardware to setup conn context and return 'cid' */
1710         wait_event_interruptible(bnx2i_ep->ofld_wait,
1711                                  bnx2i_ep->state != EP_STATE_OFLD_START);
1712
1713         if (signal_pending(current))
1714                 flush_signals(current);
1715         del_timer_sync(&bnx2i_ep->ofld_timer);
1716
1717         bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1718
1719         if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1720                 rc = -ENOSPC;
1721                 goto conn_failed;
1722         }
1723
1724         rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1725                              iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1726         if (rc) {
1727                 rc = -EINVAL;
1728                 goto conn_failed;
1729         }
1730
1731         bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1732         bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1733         clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1734
1735         memset(&saddr, 0, sizeof(saddr));
1736         if (dst_addr->sa_family == AF_INET) {
1737                 desti = (struct sockaddr_in *) dst_addr;
1738                 saddr.remote.v4 = *desti;
1739                 saddr.local.v4.sin_family = desti->sin_family;
1740         } else if (dst_addr->sa_family == AF_INET6) {
1741                 desti6 = (struct sockaddr_in6 *) dst_addr;
1742                 saddr.remote.v6 = *desti6;
1743                 saddr.local.v6.sin6_family = desti6->sin6_family;
1744         }
1745
1746         bnx2i_ep->timestamp = jiffies;
1747         bnx2i_ep->state = EP_STATE_CONNECT_START;
1748         if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1749                 rc = -EINVAL;
1750                 goto conn_failed;
1751         } else
1752                 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1753
1754         if (rc)
1755                 goto release_ep;
1756
1757         if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
1758                 goto release_ep;
1759         mutex_unlock(&hba->net_dev_lock);
1760         return ep;
1761
1762 release_ep:
1763         if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1764                 mutex_unlock(&hba->net_dev_lock);
1765                 return ERR_PTR(rc);
1766         }
1767 conn_failed:
1768 net_if_down:
1769 iscsi_cid_err:
1770         bnx2i_free_qp_resc(hba, bnx2i_ep);
1771 qp_resc_err:
1772         bnx2i_free_ep(ep);
1773         mutex_unlock(&hba->net_dev_lock);
1774 check_busy:
1775         bnx2i_unreg_dev_all();
1776         return ERR_PTR(rc);
1777 }
1778
1779
1780 /**
1781  * bnx2i_ep_poll - polls for TCP connection establishement
1782  * @ep:                 TCP connection (endpoint) handle
1783  * @timeout_ms:         timeout value in milli secs
1784  *
1785  * polls for TCP connect request to complete
1786  */
1787 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1788 {
1789         struct bnx2i_endpoint *bnx2i_ep;
1790         int rc = 0;
1791
1792         bnx2i_ep = ep->dd_data;
1793         if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1794             (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1795             (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1796                 return -1;
1797         if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1798                 return 1;
1799
1800         rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1801                                               ((bnx2i_ep->state ==
1802                                                 EP_STATE_OFLD_FAILED) ||
1803                                                (bnx2i_ep->state ==
1804                                                 EP_STATE_CONNECT_FAILED) ||
1805                                                (bnx2i_ep->state ==
1806                                                 EP_STATE_CONNECT_COMPL)),
1807                                               msecs_to_jiffies(timeout_ms));
1808         if (!rc || (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1809                 rc = -1;
1810
1811         if (rc > 0)
1812                 return 1;
1813         else if (!rc)
1814                 return 0;       /* timeout */
1815         else
1816                 return rc;
1817 }
1818
1819
1820 /**
1821  * bnx2i_ep_tcp_conn_active - check EP state transition
1822  * @ep:         endpoint pointer
1823  *
1824  * check if underlying TCP connection is active
1825  */
1826 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1827 {
1828         int ret;
1829         int cnic_dev_10g = 0;
1830
1831         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1832                 cnic_dev_10g = 1;
1833
1834         switch (bnx2i_ep->state) {
1835         case EP_STATE_CONNECT_START:
1836         case EP_STATE_CLEANUP_FAILED:
1837         case EP_STATE_OFLD_FAILED:
1838         case EP_STATE_DISCONN_TIMEDOUT:
1839                 ret = 0;
1840                 break;
1841         case EP_STATE_CONNECT_COMPL:
1842         case EP_STATE_ULP_UPDATE_START:
1843         case EP_STATE_ULP_UPDATE_COMPL:
1844         case EP_STATE_TCP_FIN_RCVD:
1845         case EP_STATE_ULP_UPDATE_FAILED:
1846                 ret = 1;
1847                 break;
1848         case EP_STATE_TCP_RST_RCVD:
1849                 ret = 0;
1850                 break;
1851         case EP_STATE_CONNECT_FAILED:
1852                 if (cnic_dev_10g)
1853                         ret = 1;
1854                 else
1855                         ret = 0;
1856                 break;
1857         default:
1858                 ret = 0;
1859         }
1860
1861         return ret;
1862 }
1863
1864
1865 /**
1866  * bnx2i_ep_disconnect - executes TCP connection teardown process
1867  * @ep:         TCP connection (endpoint) handle
1868  *
1869  * executes  TCP connection teardown process
1870  */
1871 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
1872 {
1873         struct bnx2i_endpoint *bnx2i_ep;
1874         struct bnx2i_conn *bnx2i_conn = NULL;
1875         struct iscsi_session *session = NULL;
1876         struct iscsi_conn *conn;
1877         struct cnic_dev *cnic;
1878         struct bnx2i_hba *hba;
1879
1880         bnx2i_ep = ep->dd_data;
1881
1882         /* driver should not attempt connection cleanup untill TCP_CONNECT
1883          * completes either successfully or fails. Timeout is 9-secs, so
1884          * wait for it to complete
1885          */
1886         while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
1887                 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
1888                 msleep(250);
1889
1890         if (bnx2i_ep->conn) {
1891                 bnx2i_conn = bnx2i_ep->conn;
1892                 conn = bnx2i_conn->cls_conn->dd_data;
1893                 session = conn->session;
1894
1895                 iscsi_suspend_queue(conn);
1896         }
1897
1898         hba = bnx2i_ep->hba;
1899         if (bnx2i_ep->state == EP_STATE_IDLE)
1900                 goto return_bnx2i_ep;
1901         cnic = hba->cnic;
1902
1903         mutex_lock(&hba->net_dev_lock);
1904
1905         if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
1906                 goto free_resc;
1907         if (bnx2i_ep->hba_age != hba->age)
1908                 goto free_resc;
1909
1910         if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
1911                 goto destory_conn;
1912
1913         bnx2i_ep->state = EP_STATE_DISCONN_START;
1914
1915         init_timer(&bnx2i_ep->ofld_timer);
1916         bnx2i_ep->ofld_timer.expires = 10*HZ + jiffies;
1917         bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1918         bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1919         add_timer(&bnx2i_ep->ofld_timer);
1920
1921         if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1922                 int close = 0;
1923
1924                 if (session) {
1925                         spin_lock_bh(&session->lock);
1926                         if (session->state == ISCSI_STATE_LOGGING_OUT)
1927                                 close = 1;
1928                         spin_unlock_bh(&session->lock);
1929                 }
1930                 if (close)
1931                         cnic->cm_close(bnx2i_ep->cm_sk);
1932                 else
1933                         cnic->cm_abort(bnx2i_ep->cm_sk);
1934         } else
1935                 goto free_resc;
1936
1937         /* wait for option-2 conn teardown */
1938         wait_event_interruptible(bnx2i_ep->ofld_wait,
1939                                  bnx2i_ep->state != EP_STATE_DISCONN_START);
1940
1941         if (signal_pending(current))
1942                 flush_signals(current);
1943         del_timer_sync(&bnx2i_ep->ofld_timer);
1944
1945 destory_conn:
1946         if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1947                 mutex_unlock(&hba->net_dev_lock);
1948                 return;
1949         }
1950 free_resc:
1951         mutex_unlock(&hba->net_dev_lock);
1952         bnx2i_free_qp_resc(hba, bnx2i_ep);
1953 return_bnx2i_ep:
1954         if (bnx2i_conn)
1955                 bnx2i_conn->ep = NULL;
1956
1957         bnx2i_free_ep(ep);
1958
1959         if (!hba->ofld_conns_active)
1960                 bnx2i_unreg_dev_all();
1961 }
1962
1963
1964 /**
1965  * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
1966  * @buf:        pointer to buffer containing iscsi path message
1967  *
1968  */
1969 static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
1970 {
1971         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1972         char *buf = (char *) params;
1973         u16 len = sizeof(*params);
1974
1975         /* handled by cnic driver */
1976         hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
1977                                      len);
1978
1979         return 0;
1980 }
1981
1982
1983 /*
1984  * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
1985  * used while registering with the scsi host and iSCSI transport module.
1986  */
1987 static struct scsi_host_template bnx2i_host_template = {
1988         .module                 = THIS_MODULE,
1989         .name                   = "Broadcom Offload iSCSI Initiator",
1990         .proc_name              = "bnx2i",
1991         .queuecommand           = iscsi_queuecommand,
1992         .eh_abort_handler       = iscsi_eh_abort,
1993         .eh_device_reset_handler = iscsi_eh_device_reset,
1994         .eh_target_reset_handler = iscsi_eh_target_reset,
1995         .can_queue              = 1024,
1996         .max_sectors            = 127,
1997         .cmd_per_lun            = 32,
1998         .this_id                = -1,
1999         .use_clustering         = ENABLE_CLUSTERING,
2000         .sg_tablesize           = ISCSI_MAX_BDS_PER_CMD,
2001         .shost_attrs            = bnx2i_dev_attributes,
2002 };
2003
2004 struct iscsi_transport bnx2i_iscsi_transport = {
2005         .owner                  = THIS_MODULE,
2006         .name                   = "bnx2i",
2007         .caps                   = CAP_RECOVERY_L0 | CAP_HDRDGST |
2008                                   CAP_MULTI_R2T | CAP_DATADGST |
2009                                   CAP_DATA_PATH_OFFLOAD,
2010         .param_mask             = ISCSI_MAX_RECV_DLENGTH |
2011                                   ISCSI_MAX_XMIT_DLENGTH |
2012                                   ISCSI_HDRDGST_EN |
2013                                   ISCSI_DATADGST_EN |
2014                                   ISCSI_INITIAL_R2T_EN |
2015                                   ISCSI_MAX_R2T |
2016                                   ISCSI_IMM_DATA_EN |
2017                                   ISCSI_FIRST_BURST |
2018                                   ISCSI_MAX_BURST |
2019                                   ISCSI_PDU_INORDER_EN |
2020                                   ISCSI_DATASEQ_INORDER_EN |
2021                                   ISCSI_ERL |
2022                                   ISCSI_CONN_PORT |
2023                                   ISCSI_CONN_ADDRESS |
2024                                   ISCSI_EXP_STATSN |
2025                                   ISCSI_PERSISTENT_PORT |
2026                                   ISCSI_PERSISTENT_ADDRESS |
2027                                   ISCSI_TARGET_NAME | ISCSI_TPGT |
2028                                   ISCSI_USERNAME | ISCSI_PASSWORD |
2029                                   ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
2030                                   ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
2031                                   ISCSI_LU_RESET_TMO |
2032                                   ISCSI_PING_TMO | ISCSI_RECV_TMO |
2033                                   ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
2034         .host_param_mask        = ISCSI_HOST_HWADDRESS | ISCSI_HOST_NETDEV_NAME,
2035         .create_session         = bnx2i_session_create,
2036         .destroy_session        = bnx2i_session_destroy,
2037         .create_conn            = bnx2i_conn_create,
2038         .bind_conn              = bnx2i_conn_bind,
2039         .destroy_conn           = bnx2i_conn_destroy,
2040         .set_param              = iscsi_set_param,
2041         .get_conn_param         = bnx2i_conn_get_param,
2042         .get_session_param      = iscsi_session_get_param,
2043         .get_host_param         = bnx2i_host_get_param,
2044         .start_conn             = bnx2i_conn_start,
2045         .stop_conn              = iscsi_conn_stop,
2046         .send_pdu               = iscsi_conn_send_pdu,
2047         .xmit_task              = bnx2i_task_xmit,
2048         .get_stats              = bnx2i_conn_get_stats,
2049         /* TCP connect - disconnect - option-2 interface calls */
2050         .ep_connect             = bnx2i_ep_connect,
2051         .ep_poll                = bnx2i_ep_poll,
2052         .ep_disconnect          = bnx2i_ep_disconnect,
2053         .set_path               = bnx2i_nl_set_path,
2054         /* Error recovery timeout call */
2055         .session_recovery_timedout = iscsi_session_recovery_timedout,
2056         .cleanup_task           = bnx2i_cleanup_task,
2057 };