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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / scsi / bnx2i / bnx2i_iscsi.c
blobcb71dc984797fd8293ded5f6c7806acfc6204ed1
1 /*
2 * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver.
3 *
4 * Copyright (c) 2006 - 2009 Broadcom Corporation
5 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
6 * Copyright (c) 2007, 2008 Mike Christie
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation.
11 *
12 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
13 */
14
15 #include <scsi/scsi_tcq.h>
16 #include <scsi/libiscsi.h>
17 #include "bnx2i.h"
18
19 struct scsi_transport_template *bnx2i_scsi_xport_template;
20 struct iscsi_transport bnx2i_iscsi_transport;
21 static struct scsi_host_template bnx2i_host_template;
22
23 /*
24 * Global endpoint resource info
25 */
26 static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */
27
28
29 static int bnx2i_adapter_ready(struct bnx2i_hba *hba)
30 {
31 int retval = 0;
32
33 if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
34 test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
35 test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
36 retval = -EPERM;
37 return retval;
38 }
39
40 /**
41 * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks
42 * @cmd: iscsi cmd struct pointer
43 * @buf_off: absolute buffer offset
44 * @start_bd_off: u32 pointer to return the offset within the BD
45 * indicated by 'start_bd_idx' on which 'buf_off' falls
46 * @start_bd_idx: index of the BD on which 'buf_off' falls
47 *
48 * identifies & marks various bd info for scsi command's imm data,
49 * unsolicited data and the first solicited data seq.
50 */
51 static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off,
52 u32 *start_bd_off, u32 *start_bd_idx)
53 {
54 struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl;
55 u32 cur_offset = 0;
56 u32 cur_bd_idx = 0;
57
58 if (buf_off) {
59 while (buf_off >= (cur_offset + bd_tbl->buffer_length)) {
60 cur_offset += bd_tbl->buffer_length;
61 cur_bd_idx++;
62 bd_tbl++;
63 }
64 }
65
66 *start_bd_off = buf_off - cur_offset;
67 *start_bd_idx = cur_bd_idx;
68 }
69
70 /**
71 * bnx2i_setup_write_cmd_bd_info - sets up BD various information
72 * @task: transport layer's cmd struct pointer
73 *
74 * identifies & marks various bd info for scsi command's immediate data,
75 * unsolicited data and first solicited data seq which includes BD start
76 * index & BD buf off. his function takes into account iscsi parameter such
77 * as immediate data and unsolicited data is support on this connection.
78 */
79 static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task)
80 {
81 struct bnx2i_cmd *cmd = task->dd_data;
82 u32 start_bd_offset;
83 u32 start_bd_idx;
84 u32 buffer_offset = 0;
85 u32 cmd_len = cmd->req.total_data_transfer_length;
86
87 /* if ImmediateData is turned off & IntialR2T is turned on,
88 * there will be no immediate or unsolicited data, just return.
89 */
90 if (!iscsi_task_has_unsol_data(task) && !task->imm_count)
91 return;
92
93 /* Immediate data */
94 buffer_offset += task->imm_count;
95 if (task->imm_count == cmd_len)
96 return;
97
98 if (iscsi_task_has_unsol_data(task)) {
99 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
100 &start_bd_offset, &start_bd_idx);
101 cmd->req.ud_buffer_offset = start_bd_offset;
102 cmd->req.ud_start_bd_index = start_bd_idx;
103 buffer_offset += task->unsol_r2t.data_length;
104 }
105
106 if (buffer_offset != cmd_len) {
107 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
108 &start_bd_offset, &start_bd_idx);
109 if ((start_bd_offset > task->conn->session->first_burst) ||
110 (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) {
111 int i = 0;
112
113 iscsi_conn_printk(KERN_ALERT, task->conn,
114 "bnx2i- error, buf offset 0x%x "
115 "bd_valid %d use_sg %d\n",
116 buffer_offset, cmd->io_tbl.bd_valid,
117 scsi_sg_count(cmd->scsi_cmd));
118 for (i = 0; i < cmd->io_tbl.bd_valid; i++)
119 iscsi_conn_printk(KERN_ALERT, task->conn,
120 "bnx2i err, bd[%d]: len %x\n",
121 i, cmd->io_tbl.bd_tbl[i].\
122 buffer_length);
123 }
124 cmd->req.sd_buffer_offset = start_bd_offset;
125 cmd->req.sd_start_bd_index = start_bd_idx;
126 }
127 }
128
129
130
131 /**
132 * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
133 * @hba: adapter instance
134 * @cmd: iscsi cmd struct pointer
135 *
136 * map SG list
137 */
138 static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
139 {
140 struct scsi_cmnd *sc = cmd->scsi_cmd;
141 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
142 struct scatterlist *sg;
143 int byte_count = 0;
144 int bd_count = 0;
145 int sg_count;
146 int sg_len;
147 u64 addr;
148 int i;
149
150 BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD);
151
152 sg_count = scsi_dma_map(sc);
153
154 scsi_for_each_sg(sc, sg, sg_count, i) {
155 sg_len = sg_dma_len(sg);
156 addr = (u64) sg_dma_address(sg);
157 bd[bd_count].buffer_addr_lo = addr & 0xffffffff;
158 bd[bd_count].buffer_addr_hi = addr >> 32;
159 bd[bd_count].buffer_length = sg_len;
160 bd[bd_count].flags = 0;
161 if (bd_count == 0)
162 bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;
163
164 byte_count += sg_len;
165 bd_count++;
166 }
167
168 if (bd_count)
169 bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
170
171 BUG_ON(byte_count != scsi_bufflen(sc));
172 return bd_count;
173 }
174
175 /**
176 * bnx2i_iscsi_map_sg_list - maps SG list
177 * @cmd: iscsi cmd struct pointer
178 *
179 * creates BD list table for the command
180 */
181 static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)
182 {
183 int bd_count;
184
185 bd_count = bnx2i_map_scsi_sg(cmd->conn->hba, cmd);
186 if (!bd_count) {
187 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
188
189 bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;
190 bd[0].buffer_length = bd[0].flags = 0;
191 }
192 cmd->io_tbl.bd_valid = bd_count;
193 }
194
195
196 /**
197 * bnx2i_iscsi_unmap_sg_list - unmaps SG list
198 * @cmd: iscsi cmd struct pointer
199 *
200 * unmap IO buffers and invalidate the BD table
201 */
202 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)
203 {
204 struct scsi_cmnd *sc = cmd->scsi_cmd;
205
206 if (cmd->io_tbl.bd_valid && sc) {
207 scsi_dma_unmap(sc);
208 cmd->io_tbl.bd_valid = 0;
209 }
210 }
211
212 static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)
213 {
214 memset(&cmd->req, 0x00, sizeof(cmd->req));
215 cmd->req.op_code = 0xFF;
216 cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma;
217 cmd->req.bd_list_addr_hi =
218 (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32);
219
220 }
221
222
223 /**
224 * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'
225 * @hba: pointer to adapter instance
226 * @conn: pointer to iscsi connection
227 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
228 *
229 * update iscsi cid table entry with connection pointer. This enables
230 * driver to quickly get hold of connection structure pointer in
231 * completion/interrupt thread using iscsi context ID
232 */
233 static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,
234 struct bnx2i_conn *bnx2i_conn,
235 u32 iscsi_cid)
236 {
237 if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {
238 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
239 "conn bind - entry #%d not free\n", iscsi_cid);
240 return -EBUSY;
241 }
242
243 hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn;
244 return 0;
245 }
246
247
248 /**
249 * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr
250 * @hba: pointer to adapter instance
251 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
252 */
253 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
254 u16 iscsi_cid)
255 {
256 if (!hba->cid_que.conn_cid_tbl) {
257 printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n");
258 return NULL;
259
260 } else if (iscsi_cid >= hba->max_active_conns) {
261 printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid);
262 return NULL;
263 }
264 return hba->cid_que.conn_cid_tbl[iscsi_cid];
265 }
266
267
268 /**
269 * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
270 * @hba: pointer to adapter instance
271 */
272 static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)
273 {
274 int idx;
275
276 if (!hba->cid_que.cid_free_cnt)
277 return -1;
278
279 idx = hba->cid_que.cid_q_cons_idx;
280 hba->cid_que.cid_q_cons_idx++;
281 if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx)
282 hba->cid_que.cid_q_cons_idx = 0;
283
284 hba->cid_que.cid_free_cnt--;
285 return hba->cid_que.cid_que[idx];
286 }
287
288
289 /**
290 * bnx2i_free_iscsi_cid - returns tcp port to free list
291 * @hba: pointer to adapter instance
292 * @iscsi_cid: iscsi context ID to free
293 */
294 static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)
295 {
296 int idx;
297
298 if (iscsi_cid == (u16) -1)
299 return;
300
301 hba->cid_que.cid_free_cnt++;
302
303 idx = hba->cid_que.cid_q_prod_idx;
304 hba->cid_que.cid_que[idx] = iscsi_cid;
305 hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL;
306 hba->cid_que.cid_q_prod_idx++;
307 if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx)
308 hba->cid_que.cid_q_prod_idx = 0;
309 }
310
311
312 /**
313 * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
314 * @hba: pointer to adapter instance
315 *
316 * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
317 * and initialize table attributes
318 */
319 static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)
320 {
321 int mem_size;
322 int i;
323
324 mem_size = hba->max_active_conns * sizeof(u32);
325 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
326
327 hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL);
328 if (!hba->cid_que.cid_que_base)
329 return -ENOMEM;
330
331 mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *);
332 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
333 hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL);
334 if (!hba->cid_que.conn_cid_tbl) {
335 kfree(hba->cid_que.cid_que_base);
336 hba->cid_que.cid_que_base = NULL;
337 return -ENOMEM;
338 }
339
340 hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base;
341 hba->cid_que.cid_q_prod_idx = 0;
342 hba->cid_que.cid_q_cons_idx = 0;
343 hba->cid_que.cid_q_max_idx = hba->max_active_conns;
344 hba->cid_que.cid_free_cnt = hba->max_active_conns;
345
346 for (i = 0; i < hba->max_active_conns; i++) {
347 hba->cid_que.cid_que[i] = i;
348 hba->cid_que.conn_cid_tbl[i] = NULL;
349 }
350 return 0;
351 }
352
353
354 /**
355 * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
356 * @hba: pointer to adapter instance
357 */
358 static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)
359 {
360 kfree(hba->cid_que.cid_que_base);
361 hba->cid_que.cid_que_base = NULL;
362
363 kfree(hba->cid_que.conn_cid_tbl);
364 hba->cid_que.conn_cid_tbl = NULL;
365 }
366
367
368 /**
369 * bnx2i_alloc_ep - allocates ep structure from global pool
370 * @hba: pointer to adapter instance
371 *
372 * routine allocates a free endpoint structure from global pool and
373 * a tcp port to be used for this connection. Global resource lock,
374 * 'bnx2i_resc_lock' is held while accessing shared global data structures
375 */
376 static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)
377 {
378 struct iscsi_endpoint *ep;
379 struct bnx2i_endpoint *bnx2i_ep;
380
381 ep = iscsi_create_endpoint(sizeof(*bnx2i_ep));
382 if (!ep) {
383 printk(KERN_ERR "bnx2i: Could not allocate ep\n");
384 return NULL;
385 }
386
387 bnx2i_ep = ep->dd_data;
388 INIT_LIST_HEAD(&bnx2i_ep->link);
389 bnx2i_ep->state = EP_STATE_IDLE;
390 bnx2i_ep->ep_iscsi_cid = (u16) -1;
391 bnx2i_ep->hba = hba;
392 bnx2i_ep->hba_age = hba->age;
393 hba->ofld_conns_active++;
394 init_waitqueue_head(&bnx2i_ep->ofld_wait);
395 return ep;
396 }
397
398
399 /**
400 * bnx2i_free_ep - free endpoint
401 * @ep: pointer to iscsi endpoint structure
402 */
403 static void bnx2i_free_ep(struct iscsi_endpoint *ep)
404 {
405 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
406 unsigned long flags;
407
408 spin_lock_irqsave(&bnx2i_resc_lock, flags);
409 bnx2i_ep->state = EP_STATE_IDLE;
410 bnx2i_ep->hba->ofld_conns_active--;
411
412 bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);
413 if (bnx2i_ep->conn) {
414 bnx2i_ep->conn->ep = NULL;
415 bnx2i_ep->conn = NULL;
416 }
417
418 bnx2i_ep->hba = NULL;
419 spin_unlock_irqrestore(&bnx2i_resc_lock, flags);
420 iscsi_destroy_endpoint(ep);
421 }
422
423
424 /**
425 * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
426 * @hba: adapter instance pointer
427 * @session: iscsi session pointer
428 * @cmd: iscsi command structure
429 */
430 static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,
431 struct bnx2i_cmd *cmd)
432 {
433 struct io_bdt *io = &cmd->io_tbl;
434 struct iscsi_bd *bd;
435
436 io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
437 ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),
438 &io->bd_tbl_dma, GFP_KERNEL);
439 if (!io->bd_tbl) {
440 iscsi_session_printk(KERN_ERR, session, "Could not "
441 "allocate bdt.\n");
442 return -ENOMEM;
443 }
444 io->bd_valid = 0;
445 return 0;
446 }
447
448 /**
449 * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
450 * @hba: adapter instance pointer
451 * @session: iscsi session pointer
452 * @cmd: iscsi command structure
453 */
454 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
455 struct iscsi_session *session)
456 {
457 int i;
458
459 for (i = 0; i < session->cmds_max; i++) {
460 struct iscsi_task *task = session->cmds[i];
461 struct bnx2i_cmd *cmd = task->dd_data;
462
463 if (cmd->io_tbl.bd_tbl)
464 dma_free_coherent(&hba->pcidev->dev,
465 ISCSI_MAX_BDS_PER_CMD *
466 sizeof(struct iscsi_bd),
467 cmd->io_tbl.bd_tbl,
468 cmd->io_tbl.bd_tbl_dma);
469 }
470
471 }
472
473
474 /**
475 * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
476 * @hba: adapter instance pointer
477 * @session: iscsi session pointer
478 */
479 static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
480 struct iscsi_session *session)
481 {
482 int i;
483
484 for (i = 0; i < session->cmds_max; i++) {
485 struct iscsi_task *task = session->cmds[i];
486 struct bnx2i_cmd *cmd = task->dd_data;
487
488 task->hdr = &cmd->hdr;
489 task->hdr_max = sizeof(struct iscsi_hdr);
490
491 if (bnx2i_alloc_bdt(hba, session, cmd))
492 goto free_bdts;
493 }
494
495 return 0;
496
497 free_bdts:
498 bnx2i_destroy_cmd_pool(hba, session);
499 return -ENOMEM;
500 }
501
502
503 /**
504 * bnx2i_setup_mp_bdt - allocate BD table resources
505 * @hba: pointer to adapter structure
506 *
507 * Allocate memory for dummy buffer and associated BD
508 * table to be used by middle path (MP) requests
509 */
510 static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
511 {
512 int rc = 0;
513 struct iscsi_bd *mp_bdt;
514 u64 addr;
515
516 hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
517 &hba->mp_bd_dma, GFP_KERNEL);
518 if (!hba->mp_bd_tbl) {
519 printk(KERN_ERR "unable to allocate Middle Path BDT\n");
520 rc = -1;
521 goto out;
522 }
523
524 hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
525 &hba->dummy_buf_dma, GFP_KERNEL);
526 if (!hba->dummy_buffer) {
527 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
528 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
529 hba->mp_bd_tbl, hba->mp_bd_dma);
530 hba->mp_bd_tbl = NULL;
531 rc = -1;
532 goto out;
533 }
534
535 mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
536 addr = (unsigned long) hba->dummy_buf_dma;
537 mp_bdt->buffer_addr_lo = addr & 0xffffffff;
538 mp_bdt->buffer_addr_hi = addr >> 32;
539 mp_bdt->buffer_length = PAGE_SIZE;
540 mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
541 ISCSI_BD_FIRST_IN_BD_CHAIN;
542 out:
543 return rc;
544 }
545
546
547 /**
548 * bnx2i_free_mp_bdt - releases ITT back to free pool
549 * @hba: pointer to adapter instance
550 *
551 * free MP dummy buffer and associated BD table
552 */
553 static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
554 {
555 if (hba->mp_bd_tbl) {
556 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
557 hba->mp_bd_tbl, hba->mp_bd_dma);
558 hba->mp_bd_tbl = NULL;
559 }
560 if (hba->dummy_buffer) {
561 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
562 hba->dummy_buffer, hba->dummy_buf_dma);
563 hba->dummy_buffer = NULL;
564 }
565 return;
566 }
567
568 /**
569 * bnx2i_drop_session - notifies iscsid of connection error.
570 * @hba: adapter instance pointer
571 * @session: iscsi session pointer
572 *
573 * This notifies iscsid that there is a error, so it can initiate
574 * recovery.
575 *
576 * This relies on caller using the iscsi class iterator so the object
577 * is refcounted and does not disapper from under us.
578 */
579 void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
580 {
581 iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
582 }
583
584 /**
585 * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
586 * @hba: pointer to adapter instance
587 * @ep: pointer to endpoint (transport indentifier) structure
588 *
589 * EP destroy queue manager
590 */
591 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
592 struct bnx2i_endpoint *ep)
593 {
594 write_lock_bh(&hba->ep_rdwr_lock);
595 list_add_tail(&ep->link, &hba->ep_destroy_list);
596 write_unlock_bh(&hba->ep_rdwr_lock);
597 return 0;
598 }
599
600 /**
601 * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
602 *
603 * @hba: pointer to adapter instance
604 * @ep: pointer to endpoint (transport indentifier) structure
605 *
606 * EP destroy queue manager
607 */
608 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
609 struct bnx2i_endpoint *ep)
610 {
611 write_lock_bh(&hba->ep_rdwr_lock);
612 list_del_init(&ep->link);
613 write_unlock_bh(&hba->ep_rdwr_lock);
614
615 return 0;
616 }
617
618 /**
619 * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
620 * @hba: pointer to adapter instance
621 * @ep: pointer to endpoint (transport indentifier) structure
622 *
623 * pending conn offload completion queue manager
624 */
625 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
626 struct bnx2i_endpoint *ep)
627 {
628 write_lock_bh(&hba->ep_rdwr_lock);
629 list_add_tail(&ep->link, &hba->ep_ofld_list);
630 write_unlock_bh(&hba->ep_rdwr_lock);
631 return 0;
632 }
633
634 /**
635 * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
636 * @hba: pointer to adapter instance
637 * @ep: pointer to endpoint (transport indentifier) structure
638 *
639 * pending conn offload completion queue manager
640 */
641 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
642 struct bnx2i_endpoint *ep)
643 {
644 write_lock_bh(&hba->ep_rdwr_lock);
645 list_del_init(&ep->link);
646 write_unlock_bh(&hba->ep_rdwr_lock);
647 return 0;
648 }
649
650
651 /**
652 * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
653 *
654 * @hba: pointer to adapter instance
655 * @iscsi_cid: iscsi context ID to find
656 *
657 */
658 struct bnx2i_endpoint *
659 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
660 {
661 struct list_head *list;
662 struct list_head *tmp;
663 struct bnx2i_endpoint *ep;
664
665 read_lock_bh(&hba->ep_rdwr_lock);
666 list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
667 ep = (struct bnx2i_endpoint *)list;
668
669 if (ep->ep_iscsi_cid == iscsi_cid)
670 break;
671 ep = NULL;
672 }
673 read_unlock_bh(&hba->ep_rdwr_lock);
674
675 if (!ep)
676 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
677 return ep;
678 }
679
680
681 /**
682 * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
683 * @hba: pointer to adapter instance
684 * @iscsi_cid: iscsi context ID to find
685 *
686 */
687 struct bnx2i_endpoint *
688 bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
689 {
690 struct list_head *list;
691 struct list_head *tmp;
692 struct bnx2i_endpoint *ep;
693
694 read_lock_bh(&hba->ep_rdwr_lock);
695 list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
696 ep = (struct bnx2i_endpoint *)list;
697
698 if (ep->ep_iscsi_cid == iscsi_cid)
699 break;
700 ep = NULL;
701 }
702 read_unlock_bh(&hba->ep_rdwr_lock);
703
704 if (!ep)
705 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
706
707 return ep;
708 }
709
710 /**
711 * bnx2i_setup_host_queue_size - assigns shost->can_queue param
712 * @hba: pointer to adapter instance
713 * @shost: scsi host pointer
714 *
715 * Initializes 'can_queue' parameter based on how many outstanding commands
716 * the device can handle. Each device 5708/5709/57710 has different
717 * capabilities
718 */
719 static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
720 struct Scsi_Host *shost)
721 {
722 if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
723 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
724 else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
725 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
726 else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
727 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
728 else
729 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
730 }
731
732
733 /**
734 * bnx2i_alloc_hba - allocate and init adapter instance
735 * @cnic: cnic device pointer
736 *
737 * allocate & initialize adapter structure and call other
738 * support routines to do per adapter initialization
739 */
740 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
741 {
742 struct Scsi_Host *shost;
743 struct bnx2i_hba *hba;
744
745 shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
746 if (!shost)
747 return NULL;
748 shost->dma_boundary = cnic->pcidev->dma_mask;
749 shost->transportt = bnx2i_scsi_xport_template;
750 shost->max_id = ISCSI_MAX_CONNS_PER_HBA;
751 shost->max_channel = 0;
752 shost->max_lun = 512;
753 shost->max_cmd_len = 16;
754
755 hba = iscsi_host_priv(shost);
756 hba->shost = shost;
757 hba->netdev = cnic->netdev;
758 /* Get PCI related information and update hba struct members */
759 hba->pcidev = cnic->pcidev;
760 pci_dev_get(hba->pcidev);
761 hba->pci_did = hba->pcidev->device;
762 hba->pci_vid = hba->pcidev->vendor;
763 hba->pci_sdid = hba->pcidev->subsystem_device;
764 hba->pci_svid = hba->pcidev->subsystem_vendor;
765 hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
766 hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
767
768 bnx2i_identify_device(hba);
769 bnx2i_setup_host_queue_size(hba, shost);
770
771 if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
772 hba->regview = ioremap_nocache(hba->netdev->base_addr,
773 BNX2_MQ_CONFIG2);
774 if (!hba->regview)
775 goto ioreg_map_err;
776 } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
777 hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096);
778 if (!hba->regview)
779 goto ioreg_map_err;
780 }
781
782 if (bnx2i_setup_mp_bdt(hba))
783 goto mp_bdt_mem_err;
784
785 INIT_LIST_HEAD(&hba->ep_ofld_list);
786 INIT_LIST_HEAD(&hba->ep_destroy_list);
787 rwlock_init(&hba->ep_rdwr_lock);
788
789 hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
790
791 /* different values for 5708/5709/57710 */
792 hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
793
794 if (bnx2i_setup_free_cid_que(hba))
795 goto cid_que_err;
796
797 /* SQ/RQ/CQ size can be changed via sysfx interface */
798 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
799 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
800 hba->max_sqes = sq_size;
801 else
802 hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
803 } else { /* 5706/5708/5709 */
804 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
805 hba->max_sqes = sq_size;
806 else
807 hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
808 }
809
810 hba->max_rqes = rq_size;
811 hba->max_cqes = hba->max_sqes + rq_size;
812 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
813 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
814 hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
815 } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
816 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
817
818 hba->num_ccell = hba->max_sqes / 2;
819
820 spin_lock_init(&hba->lock);
821 mutex_init(&hba->net_dev_lock);
822
823 if (iscsi_host_add(shost, &hba->pcidev->dev))
824 goto free_dump_mem;
825 return hba;
826
827 free_dump_mem:
828 bnx2i_release_free_cid_que(hba);
829 cid_que_err:
830 bnx2i_free_mp_bdt(hba);
831 mp_bdt_mem_err:
832 if (hba->regview) {
833 iounmap(hba->regview);
834 hba->regview = NULL;
835 }
836 ioreg_map_err:
837 pci_dev_put(hba->pcidev);
838 scsi_host_put(shost);
839 return NULL;
840 }
841
842 /**
843 * bnx2i_free_hba- releases hba structure and resources held by the adapter
844 * @hba: pointer to adapter instance
845 *
846 * free adapter structure and call various cleanup routines.
847 */
848 void bnx2i_free_hba(struct bnx2i_hba *hba)
849 {
850 struct Scsi_Host *shost = hba->shost;
851
852 iscsi_host_remove(shost);
853 INIT_LIST_HEAD(&hba->ep_ofld_list);
854 INIT_LIST_HEAD(&hba->ep_destroy_list);
855 pci_dev_put(hba->pcidev);
856
857 if (hba->regview) {
858 iounmap(hba->regview);
859 hba->regview = NULL;
860 }
861 bnx2i_free_mp_bdt(hba);
862 bnx2i_release_free_cid_que(hba);
863 iscsi_host_free(shost);
864 }
865
866 /**
867 * bnx2i_conn_free_login_resources - free DMA resources used for login process
868 * @hba: pointer to adapter instance
869 * @bnx2i_conn: iscsi connection pointer
870 *
871 * Login related resources, mostly BDT & payload DMA memory is freed
872 */
873 static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
874 struct bnx2i_conn *bnx2i_conn)
875 {
876 if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
877 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
878 bnx2i_conn->gen_pdu.resp_bd_tbl,
879 bnx2i_conn->gen_pdu.resp_bd_dma);
880 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
881 }
882
883 if (bnx2i_conn->gen_pdu.req_bd_tbl) {
884 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
885 bnx2i_conn->gen_pdu.req_bd_tbl,
886 bnx2i_conn->gen_pdu.req_bd_dma);
887 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
888 }
889
890 if (bnx2i_conn->gen_pdu.resp_buf) {
891 dma_free_coherent(&hba->pcidev->dev,
892 ISCSI_DEF_MAX_RECV_SEG_LEN,
893 bnx2i_conn->gen_pdu.resp_buf,
894 bnx2i_conn->gen_pdu.resp_dma_addr);
895 bnx2i_conn->gen_pdu.resp_buf = NULL;
896 }
897
898 if (bnx2i_conn->gen_pdu.req_buf) {
899 dma_free_coherent(&hba->pcidev->dev,
900 ISCSI_DEF_MAX_RECV_SEG_LEN,
901 bnx2i_conn->gen_pdu.req_buf,
902 bnx2i_conn->gen_pdu.req_dma_addr);
903 bnx2i_conn->gen_pdu.req_buf = NULL;
904 }
905 }
906
907 /**
908 * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
909 * @hba: pointer to adapter instance
910 * @bnx2i_conn: iscsi connection pointer
911 *
912 * Mgmt task DNA resources are allocated in this routine.
913 */
914 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
915 struct bnx2i_conn *bnx2i_conn)
916 {
917 /* Allocate memory for login request/response buffers */
918 bnx2i_conn->gen_pdu.req_buf =
919 dma_alloc_coherent(&hba->pcidev->dev,
920 ISCSI_DEF_MAX_RECV_SEG_LEN,
921 &bnx2i_conn->gen_pdu.req_dma_addr,
922 GFP_KERNEL);
923 if (bnx2i_conn->gen_pdu.req_buf == NULL)
924 goto login_req_buf_failure;
925
926 bnx2i_conn->gen_pdu.req_buf_size = 0;
927 bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
928
929 bnx2i_conn->gen_pdu.resp_buf =
930 dma_alloc_coherent(&hba->pcidev->dev,
931 ISCSI_DEF_MAX_RECV_SEG_LEN,
932 &bnx2i_conn->gen_pdu.resp_dma_addr,
933 GFP_KERNEL);
934 if (bnx2i_conn->gen_pdu.resp_buf == NULL)
935 goto login_resp_buf_failure;
936
937 bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
938 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
939
940 bnx2i_conn->gen_pdu.req_bd_tbl =
941 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
942 &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
943 if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
944 goto login_req_bd_tbl_failure;
945
946 bnx2i_conn->gen_pdu.resp_bd_tbl =
947 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
948 &bnx2i_conn->gen_pdu.resp_bd_dma,
949 GFP_KERNEL);
950 if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
951 goto login_resp_bd_tbl_failure;
952
953 return 0;
954
955 login_resp_bd_tbl_failure:
956 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
957 bnx2i_conn->gen_pdu.req_bd_tbl,
958 bnx2i_conn->gen_pdu.req_bd_dma);
959 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
960
961 login_req_bd_tbl_failure:
962 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
963 bnx2i_conn->gen_pdu.resp_buf,
964 bnx2i_conn->gen_pdu.resp_dma_addr);
965 bnx2i_conn->gen_pdu.resp_buf = NULL;
966 login_resp_buf_failure:
967 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
968 bnx2i_conn->gen_pdu.req_buf,
969 bnx2i_conn->gen_pdu.req_dma_addr);
970 bnx2i_conn->gen_pdu.req_buf = NULL;
971 login_req_buf_failure:
972 iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
973 "login resource alloc failed!!\n");
974 return -ENOMEM;
975
976 }
977
978
979 /**
980 * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
981 * @bnx2i_conn: iscsi connection pointer
982 *
983 * Allocates buffers and BD tables before shipping requests to cnic
984 * for PDUs prepared by 'iscsid' daemon
985 */
986 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
987 {
988 struct iscsi_bd *bd_tbl;
989
990 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
991
992 bd_tbl->buffer_addr_hi =
993 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
994 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
995 bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
996 bnx2i_conn->gen_pdu.req_buf;
997 bd_tbl->reserved0 = 0;
998 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
999 ISCSI_BD_FIRST_IN_BD_CHAIN;
1000
1001 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1002 bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1003 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1004 bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1005 bd_tbl->reserved0 = 0;
1006 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1007 ISCSI_BD_FIRST_IN_BD_CHAIN;
1008 }
1009
1010
1011 /**
1012 * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1013 * @task: transport layer task pointer
1014 *
1015 * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1016 * Nop-out and Logout requests flow through this path.
1017 */
1018 static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1019 {
1020 struct bnx2i_cmd *cmd = task->dd_data;
1021 struct bnx2i_conn *bnx2i_conn = cmd->conn;
1022 int rc = 0;
1023 char *buf;
1024 int data_len;
1025
1026 bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1027 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1028 case ISCSI_OP_LOGIN:
1029 bnx2i_send_iscsi_login(bnx2i_conn, task);
1030 break;
1031 case ISCSI_OP_NOOP_OUT:
1032 data_len = bnx2i_conn->gen_pdu.req_buf_size;
1033 buf = bnx2i_conn->gen_pdu.req_buf;
1034 if (data_len)
1035 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1036 RESERVED_ITT,
1037 buf, data_len, 1);
1038 else
1039 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1040 RESERVED_ITT,
1041 NULL, 0, 1);
1042 break;
1043 case ISCSI_OP_LOGOUT:
1044 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1045 break;
1046 case ISCSI_OP_SCSI_TMFUNC:
1047 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1048 break;
1049 default:
1050 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1051 "send_gen: unsupported op 0x%x\n",
1052 task->hdr->opcode);
1053 }
1054 return rc;
1055 }
1056
1057
1058 /**********************************************************************
1059 * SCSI-ML Interface
1060 **********************************************************************/
1061
1062 /**
1063 * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1064 * @sc: SCSI-ML command pointer
1065 * @cmd: iscsi cmd pointer
1066 */
1067 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1068 {
1069 u32 dword;
1070 int lpcnt;
1071 u8 *srcp;
1072 u32 *dstp;
1073 u32 scsi_lun[2];
1074
1075 int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1076 cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1077 cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1078
1079 lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1080 srcp = (u8 *) sc->cmnd;
1081 dstp = (u32 *) cmd->req.cdb;
1082 while (lpcnt--) {
1083 memcpy(&dword, (const void *) srcp, 4);
1084 *dstp = cpu_to_be32(dword);
1085 srcp += 4;
1086 dstp++;
1087 }
1088 if (sc->cmd_len & 0x3) {
1089 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1090 *dstp = cpu_to_be32(dword);
1091 }
1092 }
1093
1094 static void bnx2i_cleanup_task(struct iscsi_task *task)
1095 {
1096 struct iscsi_conn *conn = task->conn;
1097 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1098 struct bnx2i_hba *hba = bnx2i_conn->hba;
1099
1100 /*
1101 * mgmt task or cmd was never sent to us to transmit.
1102 */
1103 if (!task->sc || task->state == ISCSI_TASK_PENDING)
1104 return;
1105 /*
1106 * need to clean-up task context to claim dma buffers
1107 */
1108 if (task->state == ISCSI_TASK_ABRT_TMF) {
1109 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1110
1111 spin_unlock_bh(&conn->session->lock);
1112 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1113 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1114 spin_lock_bh(&conn->session->lock);
1115 }
1116 bnx2i_iscsi_unmap_sg_list(task->dd_data);
1117 }
1118
1119 /**
1120 * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1121 * @conn: transport layer conn structure pointer
1122 * @task: transport layer command structure pointer
1123 */
1124 static int
1125 bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1126 {
1127 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1128 struct bnx2i_cmd *cmd = task->dd_data;
1129
1130 memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1131
1132 bnx2i_setup_cmd_wqe_template(cmd);
1133 bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1134 if (task->data_count) {
1135 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1136 task->data_count);
1137 bnx2i_conn->gen_pdu.req_wr_ptr =
1138 bnx2i_conn->gen_pdu.req_buf + task->data_count;
1139 }
1140 cmd->conn = conn->dd_data;
1141 cmd->scsi_cmd = NULL;
1142 return bnx2i_iscsi_send_generic_request(task);
1143 }
1144
1145 /**
1146 * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1147 * @task: transport layer command structure pointer
1148 *
1149 * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1150 */
1151 static int bnx2i_task_xmit(struct iscsi_task *task)
1152 {
1153 struct iscsi_conn *conn = task->conn;
1154 struct iscsi_session *session = conn->session;
1155 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1156 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1157 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1158 struct scsi_cmnd *sc = task->sc;
1159 struct bnx2i_cmd *cmd = task->dd_data;
1160 struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr;
1161
1162 /*
1163 * If there is no scsi_cmnd this must be a mgmt task
1164 */
1165 if (!sc)
1166 return bnx2i_mtask_xmit(conn, task);
1167
1168 bnx2i_setup_cmd_wqe_template(cmd);
1169 cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1170 cmd->conn = bnx2i_conn;
1171 cmd->scsi_cmd = sc;
1172 cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1173 cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1174
1175 bnx2i_iscsi_map_sg_list(cmd);
1176 bnx2i_cpy_scsi_cdb(sc, cmd);
1177
1178 cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1179 if (sc->sc_data_direction == DMA_TO_DEVICE) {
1180 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1181 cmd->req.itt = task->itt |
1182 (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1183 bnx2i_setup_write_cmd_bd_info(task);
1184 } else {
1185 if (scsi_bufflen(sc))
1186 cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1187 cmd->req.itt = task->itt |
1188 (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1189 }
1190
1191 cmd->req.num_bds = cmd->io_tbl.bd_valid;
1192 if (!cmd->io_tbl.bd_valid) {
1193 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1194 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1195 cmd->req.num_bds = 1;
1196 }
1197
1198 bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1199 return 0;
1200 }
1201
1202 /**
1203 * bnx2i_session_create - create a new iscsi session
1204 * @cmds_max: max commands supported
1205 * @qdepth: scsi queue depth to support
1206 * @initial_cmdsn: initial iscsi CMDSN to be used for this session
1207 *
1208 * Creates a new iSCSI session instance on given device.
1209 */
1210 static struct iscsi_cls_session *
1211 bnx2i_session_create(struct iscsi_endpoint *ep,
1212 uint16_t cmds_max, uint16_t qdepth,
1213 uint32_t initial_cmdsn)
1214 {
1215 struct Scsi_Host *shost;
1216 struct iscsi_cls_session *cls_session;
1217 struct bnx2i_hba *hba;
1218 struct bnx2i_endpoint *bnx2i_ep;
1219
1220 if (!ep) {
1221 printk(KERN_ERR "bnx2i: missing ep.\n");
1222 return NULL;
1223 }
1224
1225 bnx2i_ep = ep->dd_data;
1226 shost = bnx2i_ep->hba->shost;
1227 hba = iscsi_host_priv(shost);
1228 if (bnx2i_adapter_ready(hba))
1229 return NULL;
1230
1231 /*
1232 * user can override hw limit as long as it is within
1233 * the min/max.
1234 */
1235 if (cmds_max > hba->max_sqes)
1236 cmds_max = hba->max_sqes;
1237 else if (cmds_max < BNX2I_SQ_WQES_MIN)
1238 cmds_max = BNX2I_SQ_WQES_MIN;
1239
1240 cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1241 cmds_max, 0, sizeof(struct bnx2i_cmd),
1242 initial_cmdsn, ISCSI_MAX_TARGET);
1243 if (!cls_session)
1244 return NULL;
1245
1246 if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1247 goto session_teardown;
1248 return cls_session;
1249
1250 session_teardown:
1251 iscsi_session_teardown(cls_session);
1252 return NULL;
1253 }
1254
1255
1256 /**
1257 * bnx2i_session_destroy - destroys iscsi session
1258 * @cls_session: pointer to iscsi cls session
1259 *
1260 * Destroys previously created iSCSI session instance and releases
1261 * all resources held by it
1262 */
1263 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1264 {
1265 struct iscsi_session *session = cls_session->dd_data;
1266 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1267 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1268
1269 bnx2i_destroy_cmd_pool(hba, session);
1270 iscsi_session_teardown(cls_session);
1271 }
1272
1273
1274 /**
1275 * bnx2i_conn_create - create iscsi connection instance
1276 * @cls_session: pointer to iscsi cls session
1277 * @cid: iscsi cid as per rfc (not NX2's CID terminology)
1278 *
1279 * Creates a new iSCSI connection instance for a given session
1280 */
1281 static struct iscsi_cls_conn *
1282 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1283 {
1284 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1285 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1286 struct bnx2i_conn *bnx2i_conn;
1287 struct iscsi_cls_conn *cls_conn;
1288 struct iscsi_conn *conn;
1289
1290 cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1291 cid);
1292 if (!cls_conn)
1293 return NULL;
1294 conn = cls_conn->dd_data;
1295
1296 bnx2i_conn = conn->dd_data;
1297 bnx2i_conn->cls_conn = cls_conn;
1298 bnx2i_conn->hba = hba;
1299 /* 'ep' ptr will be assigned in bind() call */
1300 bnx2i_conn->ep = NULL;
1301 init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1302
1303 if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1304 iscsi_conn_printk(KERN_ALERT, conn,
1305 "conn_new: login resc alloc failed!!\n");
1306 goto free_conn;
1307 }
1308
1309 return cls_conn;
1310
1311 free_conn:
1312 iscsi_conn_teardown(cls_conn);
1313 return NULL;
1314 }
1315
1316 /**
1317 * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1318 * @cls_session: pointer to iscsi cls session
1319 * @cls_conn: pointer to iscsi cls conn
1320 * @transport_fd: 64-bit EP handle
1321 * @is_leading: leading connection on this session?
1322 *
1323 * Binds together iSCSI session instance, iSCSI connection instance
1324 * and the TCP connection. This routine returns error code if
1325 * TCP connection does not belong on the device iSCSI sess/conn
1326 * is bound
1327 */
1328 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1329 struct iscsi_cls_conn *cls_conn,
1330 uint64_t transport_fd, int is_leading)
1331 {
1332 struct iscsi_conn *conn = cls_conn->dd_data;
1333 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1334 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1335 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1336 struct bnx2i_endpoint *bnx2i_ep;
1337 struct iscsi_endpoint *ep;
1338 int ret_code;
1339
1340 ep = iscsi_lookup_endpoint(transport_fd);
1341 if (!ep)
1342 return -EINVAL;
1343
1344 bnx2i_ep = ep->dd_data;
1345 if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1346 (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1347 /* Peer disconnect via' FIN or RST */
1348 return -EINVAL;
1349
1350 if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1351 return -EINVAL;
1352
1353 if (bnx2i_ep->hba != hba) {
1354 /* Error - TCP connection does not belong to this device
1355 */
1356 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1357 "conn bind, ep=0x%p (%s) does not",
1358 bnx2i_ep, bnx2i_ep->hba->netdev->name);
1359 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1360 "belong to hba (%s)\n",
1361 hba->netdev->name);
1362 return -EEXIST;
1363 }
1364
1365 bnx2i_ep->conn = bnx2i_conn;
1366 bnx2i_conn->ep = bnx2i_ep;
1367 bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1368 bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1369
1370 ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1371 bnx2i_ep->ep_iscsi_cid);
1372
1373 /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1374 * driver needs to explicitly replenish RQ index during setup.
1375 */
1376 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1377 bnx2i_put_rq_buf(bnx2i_conn, 0);
1378
1379 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1380 return ret_code;
1381 }
1382
1383
1384 /**
1385 * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1386 * @cls_conn: pointer to iscsi cls conn
1387 *
1388 * Destroy an iSCSI connection instance and release memory resources held by
1389 * this connection
1390 */
1391 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1392 {
1393 struct iscsi_conn *conn = cls_conn->dd_data;
1394 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1395 struct Scsi_Host *shost;
1396 struct bnx2i_hba *hba;
1397
1398 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1399 hba = iscsi_host_priv(shost);
1400
1401 bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1402 iscsi_conn_teardown(cls_conn);
1403 }
1404
1405
1406 /**
1407 * bnx2i_conn_get_param - return iscsi connection parameter to caller
1408 * @cls_conn: pointer to iscsi cls conn
1409 * @param: parameter type identifier
1410 * @buf: buffer pointer
1411 *
1412 * returns iSCSI connection parameters
1413 */
1414 static int bnx2i_conn_get_param(struct iscsi_cls_conn *cls_conn,
1415 enum iscsi_param param, char *buf)
1416 {
1417 struct iscsi_conn *conn = cls_conn->dd_data;
1418 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1419 int len = 0;
1420
1421 switch (param) {
1422 case ISCSI_PARAM_CONN_PORT:
1423 if (bnx2i_conn->ep)
1424 len = sprintf(buf, "%hu\n",
1425 bnx2i_conn->ep->cm_sk->dst_port);
1426 break;
1427 case ISCSI_PARAM_CONN_ADDRESS:
1428 if (bnx2i_conn->ep)
1429 len = sprintf(buf, "%pI4\n",
1430 &bnx2i_conn->ep->cm_sk->dst_ip);
1431 break;
1432 default:
1433 return iscsi_conn_get_param(cls_conn, param, buf);
1434 }
1435
1436 return len;
1437 }
1438
1439 /**
1440 * bnx2i_host_get_param - returns host (adapter) related parameters
1441 * @shost: scsi host pointer
1442 * @param: parameter type identifier
1443 * @buf: buffer pointer
1444 */
1445 static int bnx2i_host_get_param(struct Scsi_Host *shost,
1446 enum iscsi_host_param param, char *buf)
1447 {
1448 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1449 int len = 0;
1450
1451 switch (param) {
1452 case ISCSI_HOST_PARAM_HWADDRESS:
1453 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1454 break;
1455 case ISCSI_HOST_PARAM_NETDEV_NAME:
1456 len = sprintf(buf, "%s\n", hba->netdev->name);
1457 break;
1458 default:
1459 return iscsi_host_get_param(shost, param, buf);
1460 }
1461 return len;
1462 }
1463
1464 /**
1465 * bnx2i_conn_start - completes iscsi connection migration to FFP
1466 * @cls_conn: pointer to iscsi cls conn
1467 *
1468 * last call in FFP migration to handover iscsi conn to the driver
1469 */
1470 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1471 {
1472 struct iscsi_conn *conn = cls_conn->dd_data;
1473 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1474
1475 bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1476 bnx2i_update_iscsi_conn(conn);
1477
1478 /*
1479 * this should normally not sleep for a long time so it should
1480 * not disrupt the caller.
1481 */
1482 bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1483 bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1484 bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
1485 add_timer(&bnx2i_conn->ep->ofld_timer);
1486 /* update iSCSI context for this conn, wait for CNIC to complete */
1487 wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1488 bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1489
1490 if (signal_pending(current))
1491 flush_signals(current);
1492 del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1493
1494 iscsi_conn_start(cls_conn);
1495 return 0;
1496 }
1497
1498
1499 /**
1500 * bnx2i_conn_get_stats - returns iSCSI stats
1501 * @cls_conn: pointer to iscsi cls conn
1502 * @stats: pointer to iscsi statistic struct
1503 */
1504 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1505 struct iscsi_stats *stats)
1506 {
1507 struct iscsi_conn *conn = cls_conn->dd_data;
1508
1509 stats->txdata_octets = conn->txdata_octets;
1510 stats->rxdata_octets = conn->rxdata_octets;
1511 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1512 stats->dataout_pdus = conn->dataout_pdus_cnt;
1513 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1514 stats->datain_pdus = conn->datain_pdus_cnt;
1515 stats->r2t_pdus = conn->r2t_pdus_cnt;
1516 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1517 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1518 stats->custom_length = 3;
1519 strcpy(stats->custom[2].desc, "eh_abort_cnt");
1520 stats->custom[2].value = conn->eh_abort_cnt;
1521 stats->digest_err = 0;
1522 stats->timeout_err = 0;
1523 stats->custom_length = 0;
1524 }
1525
1526
1527 /**
1528 * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1529 * @dst_addr: target IP address
1530 *
1531 * check if route resolves to BNX2 device
1532 */
1533 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1534 {
1535 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1536 struct bnx2i_hba *hba;
1537 struct cnic_dev *cnic = NULL;
1538
1539 bnx2i_reg_dev_all();
1540
1541 hba = get_adapter_list_head();
1542 if (hba && hba->cnic)
1543 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1544 if (!cnic) {
1545 printk(KERN_ALERT "bnx2i: no route,"
1546 "can't connect using cnic\n");
1547 goto no_nx2_route;
1548 }
1549 hba = bnx2i_find_hba_for_cnic(cnic);
1550 if (!hba)
1551 goto no_nx2_route;
1552
1553 if (bnx2i_adapter_ready(hba)) {
1554 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1555 goto no_nx2_route;
1556 }
1557 if (hba->netdev->mtu > hba->mtu_supported) {
1558 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1559 hba->netdev->name, hba->netdev->mtu);
1560 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1561 hba->mtu_supported);
1562 goto no_nx2_route;
1563 }
1564 return hba;
1565 no_nx2_route:
1566 return NULL;
1567 }
1568
1569
1570 /**
1571 * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1572 * @hba: pointer to adapter instance
1573 * @ep: endpoint (transport indentifier) structure
1574 *
1575 * destroys cm_sock structure and on chip iscsi context
1576 */
1577 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1578 struct bnx2i_endpoint *ep)
1579 {
1580 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
1581 hba->cnic->cm_destroy(ep->cm_sk);
1582
1583 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
1584 ep->state = EP_STATE_DISCONN_COMPL;
1585
1586 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1587 ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1588 printk(KERN_ALERT "bnx2i - ERROR - please submit GRC Dump,"
1589 " NW/PCIe trace, driver msgs to developers"
1590 " for analysis\n");
1591 return 1;
1592 }
1593
1594 ep->state = EP_STATE_CLEANUP_START;
1595 init_timer(&ep->ofld_timer);
1596 ep->ofld_timer.expires = 10*HZ + jiffies;
1597 ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1598 ep->ofld_timer.data = (unsigned long) ep;
1599 add_timer(&ep->ofld_timer);
1600
1601 bnx2i_ep_destroy_list_add(hba, ep);
1602
1603 /* destroy iSCSI context, wait for it to complete */
1604 bnx2i_send_conn_destroy(hba, ep);
1605 wait_event_interruptible(ep->ofld_wait,
1606 (ep->state != EP_STATE_CLEANUP_START));
1607
1608 if (signal_pending(current))
1609 flush_signals(current);
1610 del_timer_sync(&ep->ofld_timer);
1611
1612 bnx2i_ep_destroy_list_del(hba, ep);
1613
1614 if (ep->state != EP_STATE_CLEANUP_CMPL)
1615 /* should never happen */
1616 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1617
1618 return 0;
1619 }
1620
1621
1622 /**
1623 * bnx2i_ep_connect - establish TCP connection to target portal
1624 * @shost: scsi host
1625 * @dst_addr: target IP address
1626 * @non_blocking: blocking or non-blocking call
1627 *
1628 * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1629 * with l5_core and the CNIC. This is a multi-step process of resolving
1630 * route to target, create a iscsi connection context, handshaking with
1631 * CNIC module to create/initialize the socket struct and finally
1632 * sending down option-2 request to complete TCP 3-way handshake
1633 */
1634 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1635 struct sockaddr *dst_addr,
1636 int non_blocking)
1637 {
1638 u32 iscsi_cid = BNX2I_CID_RESERVED;
1639 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1640 struct sockaddr_in6 *desti6;
1641 struct bnx2i_endpoint *bnx2i_ep;
1642 struct bnx2i_hba *hba;
1643 struct cnic_dev *cnic;
1644 struct cnic_sockaddr saddr;
1645 struct iscsi_endpoint *ep;
1646 int rc = 0;
1647
1648 if (shost) {
1649 /* driver is given scsi host to work with */
1650 hba = iscsi_host_priv(shost);
1651 /* Register the device with cnic if not already done so */
1652 bnx2i_register_device(hba);
1653 } else
1654 /*
1655 * check if the given destination can be reached through
1656 * a iscsi capable NetXtreme2 device
1657 */
1658 hba = bnx2i_check_route(dst_addr);
1659
1660 if (!hba) {
1661 rc = -ENOMEM;
1662 goto check_busy;
1663 }
1664
1665 cnic = hba->cnic;
1666 ep = bnx2i_alloc_ep(hba);
1667 if (!ep) {
1668 rc = -ENOMEM;
1669 goto check_busy;
1670 }
1671 bnx2i_ep = ep->dd_data;
1672
1673 mutex_lock(&hba->net_dev_lock);
1674 if (bnx2i_adapter_ready(hba)) {
1675 rc = -EPERM;
1676 goto net_if_down;
1677 }
1678
1679 bnx2i_ep->num_active_cmds = 0;
1680 iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1681 if (iscsi_cid == -1) {
1682 printk(KERN_ALERT "alloc_ep: unable to allocate iscsi cid\n");
1683 rc = -ENOMEM;
1684 goto iscsi_cid_err;
1685 }
1686 bnx2i_ep->hba_age = hba->age;
1687
1688 rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1689 if (rc != 0) {
1690 printk(KERN_ALERT "bnx2i: ep_conn, alloc QP resc error\n");
1691 rc = -ENOMEM;
1692 goto qp_resc_err;
1693 }
1694
1695 bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1696 bnx2i_ep->state = EP_STATE_OFLD_START;
1697 bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1698
1699 init_timer(&bnx2i_ep->ofld_timer);
1700 bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1701 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1702 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1703 add_timer(&bnx2i_ep->ofld_timer);
1704
1705 bnx2i_send_conn_ofld_req(hba, bnx2i_ep);
1706
1707 /* Wait for CNIC hardware to setup conn context and return 'cid' */
1708 wait_event_interruptible(bnx2i_ep->ofld_wait,
1709 bnx2i_ep->state != EP_STATE_OFLD_START);
1710
1711 if (signal_pending(current))
1712 flush_signals(current);
1713 del_timer_sync(&bnx2i_ep->ofld_timer);
1714
1715 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1716
1717 if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1718 rc = -ENOSPC;
1719 goto conn_failed;
1720 }
1721
1722 rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1723 iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1724 if (rc) {
1725 rc = -EINVAL;
1726 goto conn_failed;
1727 }
1728
1729 bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1730 bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1731 clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1732
1733 memset(&saddr, 0, sizeof(saddr));
1734 if (dst_addr->sa_family == AF_INET) {
1735 desti = (struct sockaddr_in *) dst_addr;
1736 saddr.remote.v4 = *desti;
1737 saddr.local.v4.sin_family = desti->sin_family;
1738 } else if (dst_addr->sa_family == AF_INET6) {
1739 desti6 = (struct sockaddr_in6 *) dst_addr;
1740 saddr.remote.v6 = *desti6;
1741 saddr.local.v6.sin6_family = desti6->sin6_family;
1742 }
1743
1744 bnx2i_ep->timestamp = jiffies;
1745 bnx2i_ep->state = EP_STATE_CONNECT_START;
1746 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1747 rc = -EINVAL;
1748 goto conn_failed;
1749 } else
1750 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1751
1752 if (rc)
1753 goto release_ep;
1754
1755 if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
1756 goto release_ep;
1757 mutex_unlock(&hba->net_dev_lock);
1758 return ep;
1759
1760 release_ep:
1761 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1762 mutex_unlock(&hba->net_dev_lock);
1763 return ERR_PTR(rc);
1764 }
1765 conn_failed:
1766 net_if_down:
1767 iscsi_cid_err:
1768 bnx2i_free_qp_resc(hba, bnx2i_ep);
1769 qp_resc_err:
1770 bnx2i_free_ep(ep);
1771 mutex_unlock(&hba->net_dev_lock);
1772 check_busy:
1773 bnx2i_unreg_dev_all();
1774 return ERR_PTR(rc);
1775 }
1776
1777
1778 /**
1779 * bnx2i_ep_poll - polls for TCP connection establishement
1780 * @ep: TCP connection (endpoint) handle
1781 * @timeout_ms: timeout value in milli secs
1782 *
1783 * polls for TCP connect request to complete
1784 */
1785 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1786 {
1787 struct bnx2i_endpoint *bnx2i_ep;
1788 int rc = 0;
1789
1790 bnx2i_ep = ep->dd_data;
1791 if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1792 (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1793 (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1794 return -1;
1795 if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1796 return 1;
1797
1798 rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1799 ((bnx2i_ep->state ==
1800 EP_STATE_OFLD_FAILED) ||
1801 (bnx2i_ep->state ==
1802 EP_STATE_CONNECT_FAILED) ||
1803 (bnx2i_ep->state ==
1804 EP_STATE_CONNECT_COMPL)),
1805 msecs_to_jiffies(timeout_ms));
1806 if (!rc || (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1807 rc = -1;
1808
1809 if (rc > 0)
1810 return 1;
1811 else if (!rc)
1812 return 0; /* timeout */
1813 else
1814 return rc;
1815 }
1816
1817
1818 /**
1819 * bnx2i_ep_tcp_conn_active - check EP state transition
1820 * @ep: endpoint pointer
1821 *
1822 * check if underlying TCP connection is active
1823 */
1824 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1825 {
1826 int ret;
1827 int cnic_dev_10g = 0;
1828
1829 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1830 cnic_dev_10g = 1;
1831
1832 switch (bnx2i_ep->state) {
1833 case EP_STATE_CONNECT_START:
1834 case EP_STATE_CLEANUP_FAILED:
1835 case EP_STATE_OFLD_FAILED:
1836 case EP_STATE_DISCONN_TIMEDOUT:
1837 ret = 0;
1838 break;
1839 case EP_STATE_CONNECT_COMPL:
1840 case EP_STATE_ULP_UPDATE_START:
1841 case EP_STATE_ULP_UPDATE_COMPL:
1842 case EP_STATE_TCP_FIN_RCVD:
1843 case EP_STATE_ULP_UPDATE_FAILED:
1844 ret = 1;
1845 break;
1846 case EP_STATE_TCP_RST_RCVD:
1847 ret = 0;
1848 break;
1849 case EP_STATE_CONNECT_FAILED:
1850 if (cnic_dev_10g)
1851 ret = 1;
1852 else
1853 ret = 0;
1854 break;
1855 default:
1856 ret = 0;
1857 }
1858
1859 return ret;
1860 }
1861
1862
1863 /**
1864 * bnx2i_ep_disconnect - executes TCP connection teardown process
1865 * @ep: TCP connection (endpoint) handle
1866 *
1867 * executes TCP connection teardown process
1868 */
1869 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
1870 {
1871 struct bnx2i_endpoint *bnx2i_ep;
1872 struct bnx2i_conn *bnx2i_conn = NULL;
1873 struct iscsi_session *session = NULL;
1874 struct iscsi_conn *conn;
1875 struct cnic_dev *cnic;
1876 struct bnx2i_hba *hba;
1877
1878 bnx2i_ep = ep->dd_data;
1879
1880 /* driver should not attempt connection cleanup until TCP_CONNECT
1881 * completes either successfully or fails. Timeout is 9-secs, so
1882 * wait for it to complete
1883 */
1884 while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
1885 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
1886 msleep(250);
1887
1888 if (bnx2i_ep->conn) {
1889 bnx2i_conn = bnx2i_ep->conn;
1890 conn = bnx2i_conn->cls_conn->dd_data;
1891 session = conn->session;
1892
1893 iscsi_suspend_queue(conn);
1894 }
1895
1896 hba = bnx2i_ep->hba;
1897 if (bnx2i_ep->state == EP_STATE_IDLE)
1898 goto return_bnx2i_ep;
1899 cnic = hba->cnic;
1900
1901 mutex_lock(&hba->net_dev_lock);
1902
1903 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
1904 goto free_resc;
1905 if (bnx2i_ep->hba_age != hba->age)
1906 goto free_resc;
1907
1908 if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
1909 goto destory_conn;
1910
1911 bnx2i_ep->state = EP_STATE_DISCONN_START;
1912
1913 init_timer(&bnx2i_ep->ofld_timer);
1914 bnx2i_ep->ofld_timer.expires = 10*HZ + jiffies;
1915 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1916 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1917 add_timer(&bnx2i_ep->ofld_timer);
1918
1919 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1920 int close = 0;
1921
1922 if (session) {
1923 spin_lock_bh(&session->lock);
1924 if (session->state == ISCSI_STATE_LOGGING_OUT)
1925 close = 1;
1926 spin_unlock_bh(&session->lock);
1927 }
1928 if (close)
1929 cnic->cm_close(bnx2i_ep->cm_sk);
1930 else
1931 cnic->cm_abort(bnx2i_ep->cm_sk);
1932 } else
1933 goto free_resc;
1934
1935 /* wait for option-2 conn teardown */
1936 wait_event_interruptible(bnx2i_ep->ofld_wait,
1937 bnx2i_ep->state != EP_STATE_DISCONN_START);
1938
1939 if (signal_pending(current))
1940 flush_signals(current);
1941 del_timer_sync(&bnx2i_ep->ofld_timer);
1942
1943 destory_conn:
1944 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1945 mutex_unlock(&hba->net_dev_lock);
1946 return;
1947 }
1948 free_resc:
1949 mutex_unlock(&hba->net_dev_lock);
1950 bnx2i_free_qp_resc(hba, bnx2i_ep);
1951 return_bnx2i_ep:
1952 if (bnx2i_conn)
1953 bnx2i_conn->ep = NULL;
1954
1955 bnx2i_free_ep(ep);
1956
1957 if (!hba->ofld_conns_active)
1958 bnx2i_unreg_dev_all();
1959 }
1960
1961
1962 /**
1963 * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
1964 * @buf: pointer to buffer containing iscsi path message
1965 *
1966 */
1967 static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
1968 {
1969 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1970 char *buf = (char *) params;
1971 u16 len = sizeof(*params);
1972
1973 /* handled by cnic driver */
1974 hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
1975 len);
1976
1977 return 0;
1978 }
1979
1980
1981 /*
1982 * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
1983 * used while registering with the scsi host and iSCSI transport module.
1984 */
1985 static struct scsi_host_template bnx2i_host_template = {
1986 .module = THIS_MODULE,
1987 .name = "Broadcom Offload iSCSI Initiator",
1988 .proc_name = "bnx2i",
1989 .queuecommand = iscsi_queuecommand,
1990 .eh_abort_handler = iscsi_eh_abort,
1991 .eh_device_reset_handler = iscsi_eh_device_reset,
1992 .eh_target_reset_handler = iscsi_eh_recover_target,
1993 .change_queue_depth = iscsi_change_queue_depth,
1994 .can_queue = 1024,
1995 .max_sectors = 127,
1996 .cmd_per_lun = 32,
1997 .this_id = -1,
1998 .use_clustering = ENABLE_CLUSTERING,
1999 .sg_tablesize = ISCSI_MAX_BDS_PER_CMD,
2000 .shost_attrs = bnx2i_dev_attributes,
2001 };
2002
2003 struct iscsi_transport bnx2i_iscsi_transport = {
2004 .owner = THIS_MODULE,
2005 .name = "bnx2i",
2006 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST |
2007 CAP_MULTI_R2T | CAP_DATADGST |
2008 CAP_DATA_PATH_OFFLOAD,
2009 .param_mask = ISCSI_MAX_RECV_DLENGTH |
2010 ISCSI_MAX_XMIT_DLENGTH |
2011 ISCSI_HDRDGST_EN |
2012 ISCSI_DATADGST_EN |
2013 ISCSI_INITIAL_R2T_EN |
2014 ISCSI_MAX_R2T |
2015 ISCSI_IMM_DATA_EN |
2016 ISCSI_FIRST_BURST |
2017 ISCSI_MAX_BURST |
2018 ISCSI_PDU_INORDER_EN |
2019 ISCSI_DATASEQ_INORDER_EN |
2020 ISCSI_ERL |
2021 ISCSI_CONN_PORT |
2022 ISCSI_CONN_ADDRESS |
2023 ISCSI_EXP_STATSN |
2024 ISCSI_PERSISTENT_PORT |
2025 ISCSI_PERSISTENT_ADDRESS |
2026 ISCSI_TARGET_NAME | ISCSI_TPGT |
2027 ISCSI_USERNAME | ISCSI_PASSWORD |
2028 ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
2029 ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
2030 ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO |
2031 ISCSI_PING_TMO | ISCSI_RECV_TMO |
2032 ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
2033 .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_NETDEV_NAME,
2034 .create_session = bnx2i_session_create,
2035 .destroy_session = bnx2i_session_destroy,
2036 .create_conn = bnx2i_conn_create,
2037 .bind_conn = bnx2i_conn_bind,
2038 .destroy_conn = bnx2i_conn_destroy,
2039 .set_param = iscsi_set_param,
2040 .get_conn_param = bnx2i_conn_get_param,
2041 .get_session_param = iscsi_session_get_param,
2042 .get_host_param = bnx2i_host_get_param,
2043 .start_conn = bnx2i_conn_start,
2044 .stop_conn = iscsi_conn_stop,
2045 .send_pdu = iscsi_conn_send_pdu,
2046 .xmit_task = bnx2i_task_xmit,
2047 .get_stats = bnx2i_conn_get_stats,
2048 /* TCP connect - disconnect - option-2 interface calls */
2049 .ep_connect = bnx2i_ep_connect,
2050 .ep_poll = bnx2i_ep_poll,
2051 .ep_disconnect = bnx2i_ep_disconnect,
2052 .set_path = bnx2i_nl_set_path,
2053 /* Error recovery timeout call */
2054 .session_recovery_timedout = iscsi_session_recovery_timedout,
2055 .cleanup_task = bnx2i_cleanup_task,
2056 };