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asus-laptop: use pr_fmt and pr_<level>
[linux-2.6/linux-acpi-2.6.git] / drivers / scsi / bnx2i / bnx2i_iscsi.c
blobf7412196f2f8967579518fa7c85e82c72b3950b5
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->hba = hba;
391 bnx2i_ep->hba_age = hba->age;
392 hba->ofld_conns_active++;
393 init_waitqueue_head(&bnx2i_ep->ofld_wait);
394 return ep;
395 }
396
397
398 /**
399 * bnx2i_free_ep - free endpoint
400 * @ep: pointer to iscsi endpoint structure
401 */
402 static void bnx2i_free_ep(struct iscsi_endpoint *ep)
403 {
404 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
405 unsigned long flags;
406
407 spin_lock_irqsave(&bnx2i_resc_lock, flags);
408 bnx2i_ep->state = EP_STATE_IDLE;
409 bnx2i_ep->hba->ofld_conns_active--;
410
411 bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);
412 if (bnx2i_ep->conn) {
413 bnx2i_ep->conn->ep = NULL;
414 bnx2i_ep->conn = NULL;
415 }
416
417 bnx2i_ep->hba = NULL;
418 spin_unlock_irqrestore(&bnx2i_resc_lock, flags);
419 iscsi_destroy_endpoint(ep);
420 }
421
422
423 /**
424 * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
425 * @hba: adapter instance pointer
426 * @session: iscsi session pointer
427 * @cmd: iscsi command structure
428 */
429 static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,
430 struct bnx2i_cmd *cmd)
431 {
432 struct io_bdt *io = &cmd->io_tbl;
433 struct iscsi_bd *bd;
434
435 io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
436 ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),
437 &io->bd_tbl_dma, GFP_KERNEL);
438 if (!io->bd_tbl) {
439 iscsi_session_printk(KERN_ERR, session, "Could not "
440 "allocate bdt.\n");
441 return -ENOMEM;
442 }
443 io->bd_valid = 0;
444 return 0;
445 }
446
447 /**
448 * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
449 * @hba: adapter instance pointer
450 * @session: iscsi session pointer
451 * @cmd: iscsi command structure
452 */
453 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
454 struct iscsi_session *session)
455 {
456 int i;
457
458 for (i = 0; i < session->cmds_max; i++) {
459 struct iscsi_task *task = session->cmds[i];
460 struct bnx2i_cmd *cmd = task->dd_data;
461
462 if (cmd->io_tbl.bd_tbl)
463 dma_free_coherent(&hba->pcidev->dev,
464 ISCSI_MAX_BDS_PER_CMD *
465 sizeof(struct iscsi_bd),
466 cmd->io_tbl.bd_tbl,
467 cmd->io_tbl.bd_tbl_dma);
468 }
469
470 }
471
472
473 /**
474 * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
475 * @hba: adapter instance pointer
476 * @session: iscsi session pointer
477 */
478 static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
479 struct iscsi_session *session)
480 {
481 int i;
482
483 for (i = 0; i < session->cmds_max; i++) {
484 struct iscsi_task *task = session->cmds[i];
485 struct bnx2i_cmd *cmd = task->dd_data;
486
487 /* Anil */
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 bnx2i_identify_device(hba);
768
769 bnx2i_identify_device(hba);
770 bnx2i_setup_host_queue_size(hba, shost);
771
772 if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
773 hba->regview = ioremap_nocache(hba->netdev->base_addr,
774 BNX2_MQ_CONFIG2);
775 if (!hba->regview)
776 goto ioreg_map_err;
777 } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
778 hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096);
779 if (!hba->regview)
780 goto ioreg_map_err;
781 }
782
783 if (bnx2i_setup_mp_bdt(hba))
784 goto mp_bdt_mem_err;
785
786 INIT_LIST_HEAD(&hba->ep_ofld_list);
787 INIT_LIST_HEAD(&hba->ep_destroy_list);
788 rwlock_init(&hba->ep_rdwr_lock);
789
790 hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
791
792 /* different values for 5708/5709/57710 */
793 hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
794
795 if (bnx2i_setup_free_cid_que(hba))
796 goto cid_que_err;
797
798 /* SQ/RQ/CQ size can be changed via sysfx interface */
799 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
800 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
801 hba->max_sqes = sq_size;
802 else
803 hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
804 } else { /* 5706/5708/5709 */
805 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
806 hba->max_sqes = sq_size;
807 else
808 hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
809 }
810
811 hba->max_rqes = rq_size;
812 hba->max_cqes = hba->max_sqes + rq_size;
813 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
814 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
815 hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
816 } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
817 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
818
819 hba->num_ccell = hba->max_sqes / 2;
820
821 spin_lock_init(&hba->lock);
822 mutex_init(&hba->net_dev_lock);
823
824 if (iscsi_host_add(shost, &hba->pcidev->dev))
825 goto free_dump_mem;
826 return hba;
827
828 free_dump_mem:
829 bnx2i_release_free_cid_que(hba);
830 cid_que_err:
831 bnx2i_free_mp_bdt(hba);
832 mp_bdt_mem_err:
833 if (hba->regview) {
834 iounmap(hba->regview);
835 hba->regview = NULL;
836 }
837 ioreg_map_err:
838 pci_dev_put(hba->pcidev);
839 scsi_host_put(shost);
840 return NULL;
841 }
842
843 /**
844 * bnx2i_free_hba- releases hba structure and resources held by the adapter
845 * @hba: pointer to adapter instance
846 *
847 * free adapter structure and call various cleanup routines.
848 */
849 void bnx2i_free_hba(struct bnx2i_hba *hba)
850 {
851 struct Scsi_Host *shost = hba->shost;
852
853 iscsi_host_remove(shost);
854 INIT_LIST_HEAD(&hba->ep_ofld_list);
855 INIT_LIST_HEAD(&hba->ep_destroy_list);
856 pci_dev_put(hba->pcidev);
857
858 if (hba->regview) {
859 iounmap(hba->regview);
860 hba->regview = NULL;
861 }
862 bnx2i_free_mp_bdt(hba);
863 bnx2i_release_free_cid_que(hba);
864 iscsi_host_free(shost);
865 }
866
867 /**
868 * bnx2i_conn_free_login_resources - free DMA resources used for login process
869 * @hba: pointer to adapter instance
870 * @bnx2i_conn: iscsi connection pointer
871 *
872 * Login related resources, mostly BDT & payload DMA memory is freed
873 */
874 static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
875 struct bnx2i_conn *bnx2i_conn)
876 {
877 if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
878 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
879 bnx2i_conn->gen_pdu.resp_bd_tbl,
880 bnx2i_conn->gen_pdu.resp_bd_dma);
881 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
882 }
883
884 if (bnx2i_conn->gen_pdu.req_bd_tbl) {
885 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
886 bnx2i_conn->gen_pdu.req_bd_tbl,
887 bnx2i_conn->gen_pdu.req_bd_dma);
888 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
889 }
890
891 if (bnx2i_conn->gen_pdu.resp_buf) {
892 dma_free_coherent(&hba->pcidev->dev,
893 ISCSI_DEF_MAX_RECV_SEG_LEN,
894 bnx2i_conn->gen_pdu.resp_buf,
895 bnx2i_conn->gen_pdu.resp_dma_addr);
896 bnx2i_conn->gen_pdu.resp_buf = NULL;
897 }
898
899 if (bnx2i_conn->gen_pdu.req_buf) {
900 dma_free_coherent(&hba->pcidev->dev,
901 ISCSI_DEF_MAX_RECV_SEG_LEN,
902 bnx2i_conn->gen_pdu.req_buf,
903 bnx2i_conn->gen_pdu.req_dma_addr);
904 bnx2i_conn->gen_pdu.req_buf = NULL;
905 }
906 }
907
908 /**
909 * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
910 * @hba: pointer to adapter instance
911 * @bnx2i_conn: iscsi connection pointer
912 *
913 * Mgmt task DNA resources are allocated in this routine.
914 */
915 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
916 struct bnx2i_conn *bnx2i_conn)
917 {
918 /* Allocate memory for login request/response buffers */
919 bnx2i_conn->gen_pdu.req_buf =
920 dma_alloc_coherent(&hba->pcidev->dev,
921 ISCSI_DEF_MAX_RECV_SEG_LEN,
922 &bnx2i_conn->gen_pdu.req_dma_addr,
923 GFP_KERNEL);
924 if (bnx2i_conn->gen_pdu.req_buf == NULL)
925 goto login_req_buf_failure;
926
927 bnx2i_conn->gen_pdu.req_buf_size = 0;
928 bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
929
930 bnx2i_conn->gen_pdu.resp_buf =
931 dma_alloc_coherent(&hba->pcidev->dev,
932 ISCSI_DEF_MAX_RECV_SEG_LEN,
933 &bnx2i_conn->gen_pdu.resp_dma_addr,
934 GFP_KERNEL);
935 if (bnx2i_conn->gen_pdu.resp_buf == NULL)
936 goto login_resp_buf_failure;
937
938 bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
939 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
940
941 bnx2i_conn->gen_pdu.req_bd_tbl =
942 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
943 &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
944 if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
945 goto login_req_bd_tbl_failure;
946
947 bnx2i_conn->gen_pdu.resp_bd_tbl =
948 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
949 &bnx2i_conn->gen_pdu.resp_bd_dma,
950 GFP_KERNEL);
951 if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
952 goto login_resp_bd_tbl_failure;
953
954 return 0;
955
956 login_resp_bd_tbl_failure:
957 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
958 bnx2i_conn->gen_pdu.req_bd_tbl,
959 bnx2i_conn->gen_pdu.req_bd_dma);
960 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
961
962 login_req_bd_tbl_failure:
963 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
964 bnx2i_conn->gen_pdu.resp_buf,
965 bnx2i_conn->gen_pdu.resp_dma_addr);
966 bnx2i_conn->gen_pdu.resp_buf = NULL;
967 login_resp_buf_failure:
968 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
969 bnx2i_conn->gen_pdu.req_buf,
970 bnx2i_conn->gen_pdu.req_dma_addr);
971 bnx2i_conn->gen_pdu.req_buf = NULL;
972 login_req_buf_failure:
973 iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
974 "login resource alloc failed!!\n");
975 return -ENOMEM;
976
977 }
978
979
980 /**
981 * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
982 * @bnx2i_conn: iscsi connection pointer
983 *
984 * Allocates buffers and BD tables before shipping requests to cnic
985 * for PDUs prepared by 'iscsid' daemon
986 */
987 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
988 {
989 struct iscsi_bd *bd_tbl;
990
991 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
992
993 bd_tbl->buffer_addr_hi =
994 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
995 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
996 bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
997 bnx2i_conn->gen_pdu.req_buf;
998 bd_tbl->reserved0 = 0;
999 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1000 ISCSI_BD_FIRST_IN_BD_CHAIN;
1001
1002 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1003 bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1004 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1005 bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1006 bd_tbl->reserved0 = 0;
1007 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1008 ISCSI_BD_FIRST_IN_BD_CHAIN;
1009 }
1010
1011
1012 /**
1013 * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1014 * @task: transport layer task pointer
1015 *
1016 * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1017 * Nop-out and Logout requests flow through this path.
1018 */
1019 static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1020 {
1021 struct bnx2i_cmd *cmd = task->dd_data;
1022 struct bnx2i_conn *bnx2i_conn = cmd->conn;
1023 int rc = 0;
1024 char *buf;
1025 int data_len;
1026
1027 bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1028 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1029 case ISCSI_OP_LOGIN:
1030 bnx2i_send_iscsi_login(bnx2i_conn, task);
1031 break;
1032 case ISCSI_OP_NOOP_OUT:
1033 data_len = bnx2i_conn->gen_pdu.req_buf_size;
1034 buf = bnx2i_conn->gen_pdu.req_buf;
1035 if (data_len)
1036 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1037 RESERVED_ITT,
1038 buf, data_len, 1);
1039 else
1040 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1041 RESERVED_ITT,
1042 NULL, 0, 1);
1043 break;
1044 case ISCSI_OP_LOGOUT:
1045 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1046 break;
1047 case ISCSI_OP_SCSI_TMFUNC:
1048 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1049 break;
1050 default:
1051 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1052 "send_gen: unsupported op 0x%x\n",
1053 task->hdr->opcode);
1054 }
1055 return rc;
1056 }
1057
1058
1059 /**********************************************************************
1060 * SCSI-ML Interface
1061 **********************************************************************/
1062
1063 /**
1064 * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1065 * @sc: SCSI-ML command pointer
1066 * @cmd: iscsi cmd pointer
1067 */
1068 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1069 {
1070 u32 dword;
1071 int lpcnt;
1072 u8 *srcp;
1073 u32 *dstp;
1074 u32 scsi_lun[2];
1075
1076 int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1077 cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1078 cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1079
1080 lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1081 srcp = (u8 *) sc->cmnd;
1082 dstp = (u32 *) cmd->req.cdb;
1083 while (lpcnt--) {
1084 memcpy(&dword, (const void *) srcp, 4);
1085 *dstp = cpu_to_be32(dword);
1086 srcp += 4;
1087 dstp++;
1088 }
1089 if (sc->cmd_len & 0x3) {
1090 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1091 *dstp = cpu_to_be32(dword);
1092 }
1093 }
1094
1095 static void bnx2i_cleanup_task(struct iscsi_task *task)
1096 {
1097 struct iscsi_conn *conn = task->conn;
1098 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1099 struct bnx2i_hba *hba = bnx2i_conn->hba;
1100
1101 /*
1102 * mgmt task or cmd was never sent to us to transmit.
1103 */
1104 if (!task->sc || task->state == ISCSI_TASK_PENDING)
1105 return;
1106 /*
1107 * need to clean-up task context to claim dma buffers
1108 */
1109 if (task->state == ISCSI_TASK_ABRT_TMF) {
1110 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1111
1112 spin_unlock_bh(&conn->session->lock);
1113 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1114 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1115 spin_lock_bh(&conn->session->lock);
1116 }
1117 bnx2i_iscsi_unmap_sg_list(task->dd_data);
1118 }
1119
1120 /**
1121 * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1122 * @conn: transport layer conn structure pointer
1123 * @task: transport layer command structure pointer
1124 */
1125 static int
1126 bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1127 {
1128 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1129 struct bnx2i_cmd *cmd = task->dd_data;
1130
1131 memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1132
1133 bnx2i_setup_cmd_wqe_template(cmd);
1134 bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1135 if (task->data_count) {
1136 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1137 task->data_count);
1138 bnx2i_conn->gen_pdu.req_wr_ptr =
1139 bnx2i_conn->gen_pdu.req_buf + task->data_count;
1140 }
1141 cmd->conn = conn->dd_data;
1142 cmd->scsi_cmd = NULL;
1143 return bnx2i_iscsi_send_generic_request(task);
1144 }
1145
1146 /**
1147 * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1148 * @task: transport layer command structure pointer
1149 *
1150 * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1151 */
1152 static int bnx2i_task_xmit(struct iscsi_task *task)
1153 {
1154 struct iscsi_conn *conn = task->conn;
1155 struct iscsi_session *session = conn->session;
1156 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1157 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1158 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1159 struct scsi_cmnd *sc = task->sc;
1160 struct bnx2i_cmd *cmd = task->dd_data;
1161 struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr;
1162
1163 if (test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
1164 return -ENOTCONN;
1165
1166 if (!bnx2i_conn->is_bound)
1167 return -ENOTCONN;
1168
1169 /*
1170 * If there is no scsi_cmnd this must be a mgmt task
1171 */
1172 if (!sc)
1173 return bnx2i_mtask_xmit(conn, task);
1174
1175 bnx2i_setup_cmd_wqe_template(cmd);
1176 cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1177 cmd->conn = bnx2i_conn;
1178 cmd->scsi_cmd = sc;
1179 cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1180 cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1181
1182 bnx2i_iscsi_map_sg_list(cmd);
1183 bnx2i_cpy_scsi_cdb(sc, cmd);
1184
1185 cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1186 if (sc->sc_data_direction == DMA_TO_DEVICE) {
1187 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1188 cmd->req.itt = task->itt |
1189 (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1190 bnx2i_setup_write_cmd_bd_info(task);
1191 } else {
1192 if (scsi_bufflen(sc))
1193 cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1194 cmd->req.itt = task->itt |
1195 (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1196 }
1197
1198 cmd->req.num_bds = cmd->io_tbl.bd_valid;
1199 if (!cmd->io_tbl.bd_valid) {
1200 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1201 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1202 cmd->req.num_bds = 1;
1203 }
1204
1205 bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1206 return 0;
1207 }
1208
1209 /**
1210 * bnx2i_session_create - create a new iscsi session
1211 * @cmds_max: max commands supported
1212 * @qdepth: scsi queue depth to support
1213 * @initial_cmdsn: initial iscsi CMDSN to be used for this session
1214 *
1215 * Creates a new iSCSI session instance on given device.
1216 */
1217 static struct iscsi_cls_session *
1218 bnx2i_session_create(struct iscsi_endpoint *ep,
1219 uint16_t cmds_max, uint16_t qdepth,
1220 uint32_t initial_cmdsn)
1221 {
1222 struct Scsi_Host *shost;
1223 struct iscsi_cls_session *cls_session;
1224 struct bnx2i_hba *hba;
1225 struct bnx2i_endpoint *bnx2i_ep;
1226
1227 if (!ep) {
1228 printk(KERN_ERR "bnx2i: missing ep.\n");
1229 return NULL;
1230 }
1231
1232 bnx2i_ep = ep->dd_data;
1233 shost = bnx2i_ep->hba->shost;
1234 hba = iscsi_host_priv(shost);
1235 if (bnx2i_adapter_ready(hba))
1236 return NULL;
1237
1238 /*
1239 * user can override hw limit as long as it is within
1240 * the min/max.
1241 */
1242 if (cmds_max > hba->max_sqes)
1243 cmds_max = hba->max_sqes;
1244 else if (cmds_max < BNX2I_SQ_WQES_MIN)
1245 cmds_max = BNX2I_SQ_WQES_MIN;
1246
1247 cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1248 cmds_max, sizeof(struct bnx2i_cmd),
1249 initial_cmdsn, ISCSI_MAX_TARGET);
1250 if (!cls_session)
1251 return NULL;
1252
1253 if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1254 goto session_teardown;
1255 return cls_session;
1256
1257 session_teardown:
1258 iscsi_session_teardown(cls_session);
1259 return NULL;
1260 }
1261
1262
1263 /**
1264 * bnx2i_session_destroy - destroys iscsi session
1265 * @cls_session: pointer to iscsi cls session
1266 *
1267 * Destroys previously created iSCSI session instance and releases
1268 * all resources held by it
1269 */
1270 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1271 {
1272 struct iscsi_session *session = cls_session->dd_data;
1273 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1274 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1275
1276 bnx2i_destroy_cmd_pool(hba, session);
1277 iscsi_session_teardown(cls_session);
1278 }
1279
1280
1281 /**
1282 * bnx2i_conn_create - create iscsi connection instance
1283 * @cls_session: pointer to iscsi cls session
1284 * @cid: iscsi cid as per rfc (not NX2's CID terminology)
1285 *
1286 * Creates a new iSCSI connection instance for a given session
1287 */
1288 static struct iscsi_cls_conn *
1289 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1290 {
1291 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1292 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1293 struct bnx2i_conn *bnx2i_conn;
1294 struct iscsi_cls_conn *cls_conn;
1295 struct iscsi_conn *conn;
1296
1297 cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1298 cid);
1299 if (!cls_conn)
1300 return NULL;
1301 conn = cls_conn->dd_data;
1302
1303 bnx2i_conn = conn->dd_data;
1304 bnx2i_conn->cls_conn = cls_conn;
1305 bnx2i_conn->hba = hba;
1306 /* 'ep' ptr will be assigned in bind() call */
1307 bnx2i_conn->ep = NULL;
1308 init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1309
1310 if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1311 iscsi_conn_printk(KERN_ALERT, conn,
1312 "conn_new: login resc alloc failed!!\n");
1313 goto free_conn;
1314 }
1315
1316 return cls_conn;
1317
1318 free_conn:
1319 iscsi_conn_teardown(cls_conn);
1320 return NULL;
1321 }
1322
1323 /**
1324 * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1325 * @cls_session: pointer to iscsi cls session
1326 * @cls_conn: pointer to iscsi cls conn
1327 * @transport_fd: 64-bit EP handle
1328 * @is_leading: leading connection on this session?
1329 *
1330 * Binds together iSCSI session instance, iSCSI connection instance
1331 * and the TCP connection. This routine returns error code if
1332 * TCP connection does not belong on the device iSCSI sess/conn
1333 * is bound
1334 */
1335 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1336 struct iscsi_cls_conn *cls_conn,
1337 uint64_t transport_fd, int is_leading)
1338 {
1339 struct iscsi_conn *conn = cls_conn->dd_data;
1340 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1341 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1342 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1343 struct bnx2i_endpoint *bnx2i_ep;
1344 struct iscsi_endpoint *ep;
1345 int ret_code;
1346
1347 ep = iscsi_lookup_endpoint(transport_fd);
1348 if (!ep)
1349 return -EINVAL;
1350
1351 bnx2i_ep = ep->dd_data;
1352 if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1353 (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1354 /* Peer disconnect via' FIN or RST */
1355 return -EINVAL;
1356
1357 if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1358 return -EINVAL;
1359
1360 if (bnx2i_ep->hba != hba) {
1361 /* Error - TCP connection does not belong to this device
1362 */
1363 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1364 "conn bind, ep=0x%p (%s) does not",
1365 bnx2i_ep, bnx2i_ep->hba->netdev->name);
1366 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1367 "belong to hba (%s)\n",
1368 hba->netdev->name);
1369 return -EEXIST;
1370 }
1371
1372 bnx2i_ep->conn = bnx2i_conn;
1373 bnx2i_conn->ep = bnx2i_ep;
1374 bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1375 bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1376 bnx2i_conn->is_bound = 1;
1377
1378 ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1379 bnx2i_ep->ep_iscsi_cid);
1380
1381 /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1382 * driver needs to explicitly replenish RQ index during setup.
1383 */
1384 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1385 bnx2i_put_rq_buf(bnx2i_conn, 0);
1386
1387 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1388 return ret_code;
1389 }
1390
1391
1392 /**
1393 * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1394 * @cls_conn: pointer to iscsi cls conn
1395 *
1396 * Destroy an iSCSI connection instance and release memory resources held by
1397 * this connection
1398 */
1399 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1400 {
1401 struct iscsi_conn *conn = cls_conn->dd_data;
1402 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1403 struct Scsi_Host *shost;
1404 struct bnx2i_hba *hba;
1405
1406 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1407 hba = iscsi_host_priv(shost);
1408
1409 bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1410 iscsi_conn_teardown(cls_conn);
1411 }
1412
1413
1414 /**
1415 * bnx2i_conn_get_param - return iscsi connection parameter to caller
1416 * @cls_conn: pointer to iscsi cls conn
1417 * @param: parameter type identifier
1418 * @buf: buffer pointer
1419 *
1420 * returns iSCSI connection parameters
1421 */
1422 static int bnx2i_conn_get_param(struct iscsi_cls_conn *cls_conn,
1423 enum iscsi_param param, char *buf)
1424 {
1425 struct iscsi_conn *conn = cls_conn->dd_data;
1426 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1427 int len = 0;
1428
1429 switch (param) {
1430 case ISCSI_PARAM_CONN_PORT:
1431 if (bnx2i_conn->ep)
1432 len = sprintf(buf, "%hu\n",
1433 bnx2i_conn->ep->cm_sk->dst_port);
1434 break;
1435 case ISCSI_PARAM_CONN_ADDRESS:
1436 if (bnx2i_conn->ep)
1437 len = sprintf(buf, NIPQUAD_FMT "\n",
1438 NIPQUAD(bnx2i_conn->ep->cm_sk->dst_ip));
1439 break;
1440 default:
1441 return iscsi_conn_get_param(cls_conn, param, buf);
1442 }
1443
1444 return len;
1445 }
1446
1447 /**
1448 * bnx2i_host_get_param - returns host (adapter) related parameters
1449 * @shost: scsi host pointer
1450 * @param: parameter type identifier
1451 * @buf: buffer pointer
1452 */
1453 static int bnx2i_host_get_param(struct Scsi_Host *shost,
1454 enum iscsi_host_param param, char *buf)
1455 {
1456 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1457 int len = 0;
1458
1459 switch (param) {
1460 case ISCSI_HOST_PARAM_HWADDRESS:
1461 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1462 break;
1463 case ISCSI_HOST_PARAM_NETDEV_NAME:
1464 len = sprintf(buf, "%s\n", hba->netdev->name);
1465 break;
1466 default:
1467 return iscsi_host_get_param(shost, param, buf);
1468 }
1469 return len;
1470 }
1471
1472 /**
1473 * bnx2i_conn_start - completes iscsi connection migration to FFP
1474 * @cls_conn: pointer to iscsi cls conn
1475 *
1476 * last call in FFP migration to handover iscsi conn to the driver
1477 */
1478 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1479 {
1480 struct iscsi_conn *conn = cls_conn->dd_data;
1481 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1482
1483 bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1484 bnx2i_update_iscsi_conn(conn);
1485
1486 /*
1487 * this should normally not sleep for a long time so it should
1488 * not disrupt the caller.
1489 */
1490 bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1491 bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1492 bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
1493 add_timer(&bnx2i_conn->ep->ofld_timer);
1494 /* update iSCSI context for this conn, wait for CNIC to complete */
1495 wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1496 bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1497
1498 if (signal_pending(current))
1499 flush_signals(current);
1500 del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1501
1502 iscsi_conn_start(cls_conn);
1503 return 0;
1504 }
1505
1506
1507 /**
1508 * bnx2i_conn_get_stats - returns iSCSI stats
1509 * @cls_conn: pointer to iscsi cls conn
1510 * @stats: pointer to iscsi statistic struct
1511 */
1512 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1513 struct iscsi_stats *stats)
1514 {
1515 struct iscsi_conn *conn = cls_conn->dd_data;
1516
1517 stats->txdata_octets = conn->txdata_octets;
1518 stats->rxdata_octets = conn->rxdata_octets;
1519 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1520 stats->dataout_pdus = conn->dataout_pdus_cnt;
1521 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1522 stats->datain_pdus = conn->datain_pdus_cnt;
1523 stats->r2t_pdus = conn->r2t_pdus_cnt;
1524 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1525 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1526 stats->custom_length = 3;
1527 strcpy(stats->custom[2].desc, "eh_abort_cnt");
1528 stats->custom[2].value = conn->eh_abort_cnt;
1529 stats->digest_err = 0;
1530 stats->timeout_err = 0;
1531 stats->custom_length = 0;
1532 }
1533
1534
1535 /**
1536 * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1537 * @dst_addr: target IP address
1538 *
1539 * check if route resolves to BNX2 device
1540 */
1541 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1542 {
1543 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1544 struct bnx2i_hba *hba;
1545 struct cnic_dev *cnic = NULL;
1546
1547 bnx2i_reg_dev_all();
1548
1549 hba = get_adapter_list_head();
1550 if (hba && hba->cnic)
1551 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1552 if (!cnic) {
1553 printk(KERN_ALERT "bnx2i: no route,"
1554 "can't connect using cnic\n");
1555 goto no_nx2_route;
1556 }
1557 hba = bnx2i_find_hba_for_cnic(cnic);
1558 if (!hba)
1559 goto no_nx2_route;
1560
1561 if (bnx2i_adapter_ready(hba)) {
1562 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1563 goto no_nx2_route;
1564 }
1565 if (hba->netdev->mtu > hba->mtu_supported) {
1566 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1567 hba->netdev->name, hba->netdev->mtu);
1568 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1569 hba->mtu_supported);
1570 goto no_nx2_route;
1571 }
1572 return hba;
1573 no_nx2_route:
1574 return NULL;
1575 }
1576
1577
1578 /**
1579 * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1580 * @hba: pointer to adapter instance
1581 * @ep: endpoint (transport indentifier) structure
1582 *
1583 * destroys cm_sock structure and on chip iscsi context
1584 */
1585 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1586 struct bnx2i_endpoint *ep)
1587 {
1588 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
1589 hba->cnic->cm_destroy(ep->cm_sk);
1590
1591 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
1592 ep->state = EP_STATE_DISCONN_COMPL;
1593
1594 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1595 ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1596 printk(KERN_ALERT "bnx2i - ERROR - please submit GRC Dump,"
1597 " NW/PCIe trace, driver msgs to developers"
1598 " for analysis\n");
1599 return 1;
1600 }
1601
1602 ep->state = EP_STATE_CLEANUP_START;
1603 init_timer(&ep->ofld_timer);
1604 ep->ofld_timer.expires = 10*HZ + jiffies;
1605 ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1606 ep->ofld_timer.data = (unsigned long) ep;
1607 add_timer(&ep->ofld_timer);
1608
1609 bnx2i_ep_destroy_list_add(hba, ep);
1610
1611 /* destroy iSCSI context, wait for it to complete */
1612 bnx2i_send_conn_destroy(hba, ep);
1613 wait_event_interruptible(ep->ofld_wait,
1614 (ep->state != EP_STATE_CLEANUP_START));
1615
1616 if (signal_pending(current))
1617 flush_signals(current);
1618 del_timer_sync(&ep->ofld_timer);
1619
1620 bnx2i_ep_destroy_list_del(hba, ep);
1621
1622 if (ep->state != EP_STATE_CLEANUP_CMPL)
1623 /* should never happen */
1624 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1625
1626 return 0;
1627 }
1628
1629
1630 /**
1631 * bnx2i_ep_connect - establish TCP connection to target portal
1632 * @shost: scsi host
1633 * @dst_addr: target IP address
1634 * @non_blocking: blocking or non-blocking call
1635 *
1636 * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1637 * with l5_core and the CNIC. This is a multi-step process of resolving
1638 * route to target, create a iscsi connection context, handshaking with
1639 * CNIC module to create/initialize the socket struct and finally
1640 * sending down option-2 request to complete TCP 3-way handshake
1641 */
1642 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1643 struct sockaddr *dst_addr,
1644 int non_blocking)
1645 {
1646 u32 iscsi_cid = BNX2I_CID_RESERVED;
1647 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1648 struct sockaddr_in6 *desti6;
1649 struct bnx2i_endpoint *bnx2i_ep;
1650 struct bnx2i_hba *hba;
1651 struct cnic_dev *cnic;
1652 struct cnic_sockaddr saddr;
1653 struct iscsi_endpoint *ep;
1654 int rc = 0;
1655
1656 if (shost)
1657 /* driver is given scsi host to work with */
1658 hba = iscsi_host_priv(shost);
1659 else
1660 /*
1661 * check if the given destination can be reached through
1662 * a iscsi capable NetXtreme2 device
1663 */
1664 hba = bnx2i_check_route(dst_addr);
1665 if (!hba) {
1666 rc = -ENOMEM;
1667 goto check_busy;
1668 }
1669
1670 cnic = hba->cnic;
1671 ep = bnx2i_alloc_ep(hba);
1672 if (!ep) {
1673 rc = -ENOMEM;
1674 goto check_busy;
1675 }
1676 bnx2i_ep = ep->dd_data;
1677
1678 mutex_lock(&hba->net_dev_lock);
1679 if (bnx2i_adapter_ready(hba)) {
1680 rc = -EPERM;
1681 goto net_if_down;
1682 }
1683
1684 bnx2i_ep->state = EP_STATE_IDLE;
1685 bnx2i_ep->ep_iscsi_cid = (u16) -1;
1686 bnx2i_ep->num_active_cmds = 0;
1687 iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1688 if (iscsi_cid == -1) {
1689 printk(KERN_ALERT "alloc_ep: unable to allocate iscsi cid\n");
1690 rc = -ENOMEM;
1691 goto iscsi_cid_err;
1692 }
1693 bnx2i_ep->hba_age = hba->age;
1694
1695 rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1696 if (rc != 0) {
1697 printk(KERN_ALERT "bnx2i: ep_conn, alloc QP resc error\n");
1698 rc = -ENOMEM;
1699 goto qp_resc_err;
1700 }
1701
1702 bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1703 bnx2i_ep->state = EP_STATE_OFLD_START;
1704 bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1705
1706 init_timer(&bnx2i_ep->ofld_timer);
1707 bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1708 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1709 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1710 add_timer(&bnx2i_ep->ofld_timer);
1711
1712 bnx2i_send_conn_ofld_req(hba, bnx2i_ep);
1713
1714 /* Wait for CNIC hardware to setup conn context and return 'cid' */
1715 wait_event_interruptible(bnx2i_ep->ofld_wait,
1716 bnx2i_ep->state != EP_STATE_OFLD_START);
1717
1718 if (signal_pending(current))
1719 flush_signals(current);
1720 del_timer_sync(&bnx2i_ep->ofld_timer);
1721
1722 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1723
1724 if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1725 rc = -ENOSPC;
1726 goto conn_failed;
1727 }
1728
1729 rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1730 iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1731 if (rc) {
1732 rc = -EINVAL;
1733 goto conn_failed;
1734 }
1735
1736 bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1737 bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1738 clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1739
1740 memset(&saddr, 0, sizeof(saddr));
1741 if (dst_addr->sa_family == AF_INET) {
1742 desti = (struct sockaddr_in *) dst_addr;
1743 saddr.remote.v4 = *desti;
1744 saddr.local.v4.sin_family = desti->sin_family;
1745 } else if (dst_addr->sa_family == AF_INET6) {
1746 desti6 = (struct sockaddr_in6 *) dst_addr;
1747 saddr.remote.v6 = *desti6;
1748 saddr.local.v6.sin6_family = desti6->sin6_family;
1749 }
1750
1751 bnx2i_ep->timestamp = jiffies;
1752 bnx2i_ep->state = EP_STATE_CONNECT_START;
1753 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1754 rc = -EINVAL;
1755 goto conn_failed;
1756 } else
1757 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1758
1759 if (rc)
1760 goto release_ep;
1761
1762 if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
1763 goto release_ep;
1764 mutex_unlock(&hba->net_dev_lock);
1765 return ep;
1766
1767 release_ep:
1768 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1769 mutex_unlock(&hba->net_dev_lock);
1770 return ERR_PTR(rc);
1771 }
1772 conn_failed:
1773 net_if_down:
1774 iscsi_cid_err:
1775 bnx2i_free_qp_resc(hba, bnx2i_ep);
1776 qp_resc_err:
1777 bnx2i_free_ep(ep);
1778 mutex_unlock(&hba->net_dev_lock);
1779 check_busy:
1780 bnx2i_unreg_dev_all();
1781 return ERR_PTR(rc);
1782 }
1783
1784
1785 /**
1786 * bnx2i_ep_poll - polls for TCP connection establishement
1787 * @ep: TCP connection (endpoint) handle
1788 * @timeout_ms: timeout value in milli secs
1789 *
1790 * polls for TCP connect request to complete
1791 */
1792 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1793 {
1794 struct bnx2i_endpoint *bnx2i_ep;
1795 int rc = 0;
1796
1797 bnx2i_ep = ep->dd_data;
1798 if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1799 (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1800 (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1801 return -1;
1802 if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1803 return 1;
1804
1805 rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1806 ((bnx2i_ep->state ==
1807 EP_STATE_OFLD_FAILED) ||
1808 (bnx2i_ep->state ==
1809 EP_STATE_CONNECT_FAILED) ||
1810 (bnx2i_ep->state ==
1811 EP_STATE_CONNECT_COMPL)),
1812 msecs_to_jiffies(timeout_ms));
1813 if (!rc || (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1814 rc = -1;
1815
1816 if (rc > 0)
1817 return 1;
1818 else if (!rc)
1819 return 0; /* timeout */
1820 else
1821 return rc;
1822 }
1823
1824
1825 /**
1826 * bnx2i_ep_tcp_conn_active - check EP state transition
1827 * @ep: endpoint pointer
1828 *
1829 * check if underlying TCP connection is active
1830 */
1831 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1832 {
1833 int ret;
1834 int cnic_dev_10g = 0;
1835
1836 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1837 cnic_dev_10g = 1;
1838
1839 switch (bnx2i_ep->state) {
1840 case EP_STATE_CONNECT_START:
1841 case EP_STATE_CLEANUP_FAILED:
1842 case EP_STATE_OFLD_FAILED:
1843 case EP_STATE_DISCONN_TIMEDOUT:
1844 ret = 0;
1845 break;
1846 case EP_STATE_CONNECT_COMPL:
1847 case EP_STATE_ULP_UPDATE_START:
1848 case EP_STATE_ULP_UPDATE_COMPL:
1849 case EP_STATE_TCP_FIN_RCVD:
1850 case EP_STATE_ULP_UPDATE_FAILED:
1851 ret = 1;
1852 break;
1853 case EP_STATE_TCP_RST_RCVD:
1854 ret = 0;
1855 break;
1856 case EP_STATE_CONNECT_FAILED:
1857 if (cnic_dev_10g)
1858 ret = 1;
1859 else
1860 ret = 0;
1861 break;
1862 default:
1863 ret = 0;
1864 }
1865
1866 return ret;
1867 }
1868
1869
1870 /**
1871 * bnx2i_ep_disconnect - executes TCP connection teardown process
1872 * @ep: TCP connection (endpoint) handle
1873 *
1874 * executes TCP connection teardown process
1875 */
1876 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
1877 {
1878 struct bnx2i_endpoint *bnx2i_ep;
1879 struct bnx2i_conn *bnx2i_conn = NULL;
1880 struct iscsi_session *session = NULL;
1881 struct iscsi_conn *conn;
1882 struct cnic_dev *cnic;
1883 struct bnx2i_hba *hba;
1884
1885 bnx2i_ep = ep->dd_data;
1886
1887 /* driver should not attempt connection cleanup untill TCP_CONNECT
1888 * completes either successfully or fails. Timeout is 9-secs, so
1889 * wait for it to complete
1890 */
1891 while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
1892 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
1893 msleep(250);
1894
1895 if (bnx2i_ep->conn) {
1896 bnx2i_conn = bnx2i_ep->conn;
1897 conn = bnx2i_conn->cls_conn->dd_data;
1898 session = conn->session;
1899
1900 spin_lock_bh(&session->lock);
1901 bnx2i_conn->is_bound = 0;
1902 spin_unlock_bh(&session->lock);
1903 }
1904
1905 hba = bnx2i_ep->hba;
1906 if (bnx2i_ep->state == EP_STATE_IDLE)
1907 goto return_bnx2i_ep;
1908 cnic = hba->cnic;
1909
1910 mutex_lock(&hba->net_dev_lock);
1911
1912 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
1913 goto free_resc;
1914 if (bnx2i_ep->hba_age != hba->age)
1915 goto free_resc;
1916
1917 if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
1918 goto destory_conn;
1919
1920 bnx2i_ep->state = EP_STATE_DISCONN_START;
1921
1922 init_timer(&bnx2i_ep->ofld_timer);
1923 bnx2i_ep->ofld_timer.expires = 10*HZ + jiffies;
1924 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1925 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1926 add_timer(&bnx2i_ep->ofld_timer);
1927
1928 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1929 int close = 0;
1930
1931 if (session) {
1932 spin_lock_bh(&session->lock);
1933 if (session->state == ISCSI_STATE_LOGGING_OUT)
1934 close = 1;
1935 spin_unlock_bh(&session->lock);
1936 }
1937 if (close)
1938 cnic->cm_close(bnx2i_ep->cm_sk);
1939 else
1940 cnic->cm_abort(bnx2i_ep->cm_sk);
1941 } else
1942 goto free_resc;
1943
1944 /* wait for option-2 conn teardown */
1945 wait_event_interruptible(bnx2i_ep->ofld_wait,
1946 bnx2i_ep->state != EP_STATE_DISCONN_START);
1947
1948 if (signal_pending(current))
1949 flush_signals(current);
1950 del_timer_sync(&bnx2i_ep->ofld_timer);
1951
1952 destory_conn:
1953 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1954 mutex_unlock(&hba->net_dev_lock);
1955 return;
1956 }
1957 free_resc:
1958 mutex_unlock(&hba->net_dev_lock);
1959 bnx2i_free_qp_resc(hba, bnx2i_ep);
1960 return_bnx2i_ep:
1961 if (bnx2i_conn)
1962 bnx2i_conn->ep = NULL;
1963
1964 bnx2i_free_ep(ep);
1965
1966 if (!hba->ofld_conns_active)
1967 bnx2i_unreg_dev_all();
1968 }
1969
1970
1971 /**
1972 * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
1973 * @buf: pointer to buffer containing iscsi path message
1974 *
1975 */
1976 static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
1977 {
1978 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1979 char *buf = (char *) params;
1980 u16 len = sizeof(*params);
1981
1982 /* handled by cnic driver */
1983 hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
1984 len);
1985
1986 return 0;
1987 }
1988
1989
1990 /*
1991 * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
1992 * used while registering with the scsi host and iSCSI transport module.
1993 */
1994 static struct scsi_host_template bnx2i_host_template = {
1995 .module = THIS_MODULE,
1996 .name = "Broadcom Offload iSCSI Initiator",
1997 .proc_name = "bnx2i",
1998 .queuecommand = iscsi_queuecommand,
1999 .eh_abort_handler = iscsi_eh_abort,
2000 .eh_device_reset_handler = iscsi_eh_device_reset,
2001 .eh_target_reset_handler = iscsi_eh_target_reset,
2002 .can_queue = 1024,
2003 .max_sectors = 127,
2004 .cmd_per_lun = 32,
2005 .this_id = -1,
2006 .use_clustering = ENABLE_CLUSTERING,
2007 .sg_tablesize = ISCSI_MAX_BDS_PER_CMD,
2008 .shost_attrs = bnx2i_dev_attributes,
2009 };
2010
2011 struct iscsi_transport bnx2i_iscsi_transport = {
2012 .owner = THIS_MODULE,
2013 .name = "bnx2i",
2014 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST |
2015 CAP_MULTI_R2T | CAP_DATADGST |
2016 CAP_DATA_PATH_OFFLOAD,
2017 .param_mask = ISCSI_MAX_RECV_DLENGTH |
2018 ISCSI_MAX_XMIT_DLENGTH |
2019 ISCSI_HDRDGST_EN |
2020 ISCSI_DATADGST_EN |
2021 ISCSI_INITIAL_R2T_EN |
2022 ISCSI_MAX_R2T |
2023 ISCSI_IMM_DATA_EN |
2024 ISCSI_FIRST_BURST |
2025 ISCSI_MAX_BURST |
2026 ISCSI_PDU_INORDER_EN |
2027 ISCSI_DATASEQ_INORDER_EN |
2028 ISCSI_ERL |
2029 ISCSI_CONN_PORT |
2030 ISCSI_CONN_ADDRESS |
2031 ISCSI_EXP_STATSN |
2032 ISCSI_PERSISTENT_PORT |
2033 ISCSI_PERSISTENT_ADDRESS |
2034 ISCSI_TARGET_NAME | ISCSI_TPGT |
2035 ISCSI_USERNAME | ISCSI_PASSWORD |
2036 ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
2037 ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
2038 ISCSI_LU_RESET_TMO |
2039 ISCSI_PING_TMO | ISCSI_RECV_TMO |
2040 ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
2041 .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_NETDEV_NAME,
2042 .create_session = bnx2i_session_create,
2043 .destroy_session = bnx2i_session_destroy,
2044 .create_conn = bnx2i_conn_create,
2045 .bind_conn = bnx2i_conn_bind,
2046 .destroy_conn = bnx2i_conn_destroy,
2047 .set_param = iscsi_set_param,
2048 .get_conn_param = bnx2i_conn_get_param,
2049 .get_session_param = iscsi_session_get_param,
2050 .get_host_param = bnx2i_host_get_param,
2051 .start_conn = bnx2i_conn_start,
2052 .stop_conn = iscsi_conn_stop,
2053 .send_pdu = iscsi_conn_send_pdu,
2054 .xmit_task = bnx2i_task_xmit,
2055 .get_stats = bnx2i_conn_get_stats,
2056 /* TCP connect - disconnect - option-2 interface calls */
2057 .ep_connect = bnx2i_ep_connect,
2058 .ep_poll = bnx2i_ep_poll,
2059 .ep_disconnect = bnx2i_ep_disconnect,
2060 .set_path = bnx2i_nl_set_path,
2061 /* Error recovery timeout call */
2062 .session_recovery_timedout = iscsi_session_recovery_timedout,
2063 .cleanup_task = bnx2i_cleanup_task,
2064 };
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