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Btrfs: Fix race in btrfs_mark_extent_written
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / bnx2i / bnx2i_iscsi.c
blobcafb888c237625c55aa4e35d848b8f5d23eaf194
1 /*
2 * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver.
3 *
4 * Copyright (c) 2006 - 2009 Broadcom Corporation
5 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
6 * Copyright (c) 2007, 2008 Mike Christie
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation.
11 *
12 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
13 */
14
15 #include <scsi/scsi_tcq.h>
16 #include <scsi/libiscsi.h>
17 #include "bnx2i.h"
18
19 struct scsi_transport_template *bnx2i_scsi_xport_template;
20 struct iscsi_transport bnx2i_iscsi_transport;
21 static struct scsi_host_template bnx2i_host_template;
22
23 /*
24 * Global endpoint resource info
25 */
26 static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */
27
28
29 static int bnx2i_adapter_ready(struct bnx2i_hba *hba)
30 {
31 int retval = 0;
32
33 if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
34 test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
35 test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
36 retval = -EPERM;
37 return retval;
38 }
39
40 /**
41 * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks
42 * @cmd: iscsi cmd struct pointer
43 * @buf_off: absolute buffer offset
44 * @start_bd_off: u32 pointer to return the offset within the BD
45 * indicated by 'start_bd_idx' on which 'buf_off' falls
46 * @start_bd_idx: index of the BD on which 'buf_off' falls
47 *
48 * identifies & marks various bd info for scsi command's imm data,
49 * unsolicited data and the first solicited data seq.
50 */
51 static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off,
52 u32 *start_bd_off, u32 *start_bd_idx)
53 {
54 struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl;
55 u32 cur_offset = 0;
56 u32 cur_bd_idx = 0;
57
58 if (buf_off) {
59 while (buf_off >= (cur_offset + bd_tbl->buffer_length)) {
60 cur_offset += bd_tbl->buffer_length;
61 cur_bd_idx++;
62 bd_tbl++;
63 }
64 }
65
66 *start_bd_off = buf_off - cur_offset;
67 *start_bd_idx = cur_bd_idx;
68 }
69
70 /**
71 * bnx2i_setup_write_cmd_bd_info - sets up BD various information
72 * @task: transport layer's cmd struct pointer
73 *
74 * identifies & marks various bd info for scsi command's immediate data,
75 * unsolicited data and first solicited data seq which includes BD start
76 * index & BD buf off. his function takes into account iscsi parameter such
77 * as immediate data and unsolicited data is support on this connection.
78 */
79 static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task)
80 {
81 struct bnx2i_cmd *cmd = task->dd_data;
82 u32 start_bd_offset;
83 u32 start_bd_idx;
84 u32 buffer_offset = 0;
85 u32 cmd_len = cmd->req.total_data_transfer_length;
86
87 /* if ImmediateData is turned off & IntialR2T is turned on,
88 * there will be no immediate or unsolicited data, just return.
89 */
90 if (!iscsi_task_has_unsol_data(task) && !task->imm_count)
91 return;
92
93 /* Immediate data */
94 buffer_offset += task->imm_count;
95 if (task->imm_count == cmd_len)
96 return;
97
98 if (iscsi_task_has_unsol_data(task)) {
99 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
100 &start_bd_offset, &start_bd_idx);
101 cmd->req.ud_buffer_offset = start_bd_offset;
102 cmd->req.ud_start_bd_index = start_bd_idx;
103 buffer_offset += task->unsol_r2t.data_length;
104 }
105
106 if (buffer_offset != cmd_len) {
107 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
108 &start_bd_offset, &start_bd_idx);
109 if ((start_bd_offset > task->conn->session->first_burst) ||
110 (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) {
111 int i = 0;
112
113 iscsi_conn_printk(KERN_ALERT, task->conn,
114 "bnx2i- error, buf offset 0x%x "
115 "bd_valid %d use_sg %d\n",
116 buffer_offset, cmd->io_tbl.bd_valid,
117 scsi_sg_count(cmd->scsi_cmd));
118 for (i = 0; i < cmd->io_tbl.bd_valid; i++)
119 iscsi_conn_printk(KERN_ALERT, task->conn,
120 "bnx2i err, bd[%d]: len %x\n",
121 i, cmd->io_tbl.bd_tbl[i].\
122 buffer_length);
123 }
124 cmd->req.sd_buffer_offset = start_bd_offset;
125 cmd->req.sd_start_bd_index = start_bd_idx;
126 }
127 }
128
129
130
131 /**
132 * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
133 * @hba: adapter instance
134 * @cmd: iscsi cmd struct pointer
135 *
136 * map SG list
137 */
138 static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
139 {
140 struct scsi_cmnd *sc = cmd->scsi_cmd;
141 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
142 struct scatterlist *sg;
143 int byte_count = 0;
144 int bd_count = 0;
145 int sg_count;
146 int sg_len;
147 u64 addr;
148 int i;
149
150 BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD);
151
152 sg_count = scsi_dma_map(sc);
153
154 scsi_for_each_sg(sc, sg, sg_count, i) {
155 sg_len = sg_dma_len(sg);
156 addr = (u64) sg_dma_address(sg);
157 bd[bd_count].buffer_addr_lo = addr & 0xffffffff;
158 bd[bd_count].buffer_addr_hi = addr >> 32;
159 bd[bd_count].buffer_length = sg_len;
160 bd[bd_count].flags = 0;
161 if (bd_count == 0)
162 bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;
163
164 byte_count += sg_len;
165 bd_count++;
166 }
167
168 if (bd_count)
169 bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
170
171 BUG_ON(byte_count != scsi_bufflen(sc));
172 return bd_count;
173 }
174
175 /**
176 * bnx2i_iscsi_map_sg_list - maps SG list
177 * @cmd: iscsi cmd struct pointer
178 *
179 * creates BD list table for the command
180 */
181 static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)
182 {
183 int bd_count;
184
185 bd_count = bnx2i_map_scsi_sg(cmd->conn->hba, cmd);
186 if (!bd_count) {
187 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
188
189 bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;
190 bd[0].buffer_length = bd[0].flags = 0;
191 }
192 cmd->io_tbl.bd_valid = bd_count;
193 }
194
195
196 /**
197 * bnx2i_iscsi_unmap_sg_list - unmaps SG list
198 * @cmd: iscsi cmd struct pointer
199 *
200 * unmap IO buffers and invalidate the BD table
201 */
202 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)
203 {
204 struct scsi_cmnd *sc = cmd->scsi_cmd;
205
206 if (cmd->io_tbl.bd_valid && sc) {
207 scsi_dma_unmap(sc);
208 cmd->io_tbl.bd_valid = 0;
209 }
210 }
211
212 static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)
213 {
214 memset(&cmd->req, 0x00, sizeof(cmd->req));
215 cmd->req.op_code = 0xFF;
216 cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma;
217 cmd->req.bd_list_addr_hi =
218 (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32);
219
220 }
221
222
223 /**
224 * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'
225 * @hba: pointer to adapter instance
226 * @conn: pointer to iscsi connection
227 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
228 *
229 * update iscsi cid table entry with connection pointer. This enables
230 * driver to quickly get hold of connection structure pointer in
231 * completion/interrupt thread using iscsi context ID
232 */
233 static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,
234 struct bnx2i_conn *bnx2i_conn,
235 u32 iscsi_cid)
236 {
237 if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {
238 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
239 "conn bind - entry #%d not free\n", iscsi_cid);
240 return -EBUSY;
241 }
242
243 hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn;
244 return 0;
245 }
246
247
248 /**
249 * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr
250 * @hba: pointer to adapter instance
251 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
252 */
253 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
254 u16 iscsi_cid)
255 {
256 if (!hba->cid_que.conn_cid_tbl) {
257 printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n");
258 return NULL;
259
260 } else if (iscsi_cid >= hba->max_active_conns) {
261 printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid);
262 return NULL;
263 }
264 return hba->cid_que.conn_cid_tbl[iscsi_cid];
265 }
266
267
268 /**
269 * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
270 * @hba: pointer to adapter instance
271 */
272 static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)
273 {
274 int idx;
275
276 if (!hba->cid_que.cid_free_cnt)
277 return -1;
278
279 idx = hba->cid_que.cid_q_cons_idx;
280 hba->cid_que.cid_q_cons_idx++;
281 if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx)
282 hba->cid_que.cid_q_cons_idx = 0;
283
284 hba->cid_que.cid_free_cnt--;
285 return hba->cid_que.cid_que[idx];
286 }
287
288
289 /**
290 * bnx2i_free_iscsi_cid - returns tcp port to free list
291 * @hba: pointer to adapter instance
292 * @iscsi_cid: iscsi context ID to free
293 */
294 static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)
295 {
296 int idx;
297
298 if (iscsi_cid == (u16) -1)
299 return;
300
301 hba->cid_que.cid_free_cnt++;
302
303 idx = hba->cid_que.cid_q_prod_idx;
304 hba->cid_que.cid_que[idx] = iscsi_cid;
305 hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL;
306 hba->cid_que.cid_q_prod_idx++;
307 if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx)
308 hba->cid_que.cid_q_prod_idx = 0;
309 }
310
311
312 /**
313 * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
314 * @hba: pointer to adapter instance
315 *
316 * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
317 * and initialize table attributes
318 */
319 static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)
320 {
321 int mem_size;
322 int i;
323
324 mem_size = hba->max_active_conns * sizeof(u32);
325 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
326
327 hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL);
328 if (!hba->cid_que.cid_que_base)
329 return -ENOMEM;
330
331 mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *);
332 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
333 hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL);
334 if (!hba->cid_que.conn_cid_tbl) {
335 kfree(hba->cid_que.cid_que_base);
336 hba->cid_que.cid_que_base = NULL;
337 return -ENOMEM;
338 }
339
340 hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base;
341 hba->cid_que.cid_q_prod_idx = 0;
342 hba->cid_que.cid_q_cons_idx = 0;
343 hba->cid_que.cid_q_max_idx = hba->max_active_conns;
344 hba->cid_que.cid_free_cnt = hba->max_active_conns;
345
346 for (i = 0; i < hba->max_active_conns; i++) {
347 hba->cid_que.cid_que[i] = i;
348 hba->cid_que.conn_cid_tbl[i] = NULL;
349 }
350 return 0;
351 }
352
353
354 /**
355 * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
356 * @hba: pointer to adapter instance
357 */
358 static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)
359 {
360 kfree(hba->cid_que.cid_que_base);
361 hba->cid_que.cid_que_base = NULL;
362
363 kfree(hba->cid_que.conn_cid_tbl);
364 hba->cid_que.conn_cid_tbl = NULL;
365 }
366
367
368 /**
369 * bnx2i_alloc_ep - allocates ep structure from global pool
370 * @hba: pointer to adapter instance
371 *
372 * routine allocates a free endpoint structure from global pool and
373 * a tcp port to be used for this connection. Global resource lock,
374 * 'bnx2i_resc_lock' is held while accessing shared global data structures
375 */
376 static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)
377 {
378 struct iscsi_endpoint *ep;
379 struct bnx2i_endpoint *bnx2i_ep;
380
381 ep = iscsi_create_endpoint(sizeof(*bnx2i_ep));
382 if (!ep) {
383 printk(KERN_ERR "bnx2i: Could not allocate ep\n");
384 return NULL;
385 }
386
387 bnx2i_ep = ep->dd_data;
388 INIT_LIST_HEAD(&bnx2i_ep->link);
389 bnx2i_ep->state = EP_STATE_IDLE;
390 bnx2i_ep->ep_iscsi_cid = (u16) -1;
391 bnx2i_ep->hba = hba;
392 bnx2i_ep->hba_age = hba->age;
393 hba->ofld_conns_active++;
394 init_waitqueue_head(&bnx2i_ep->ofld_wait);
395 return ep;
396 }
397
398
399 /**
400 * bnx2i_free_ep - free endpoint
401 * @ep: pointer to iscsi endpoint structure
402 */
403 static void bnx2i_free_ep(struct iscsi_endpoint *ep)
404 {
405 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
406 unsigned long flags;
407
408 spin_lock_irqsave(&bnx2i_resc_lock, flags);
409 bnx2i_ep->state = EP_STATE_IDLE;
410 bnx2i_ep->hba->ofld_conns_active--;
411
412 bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);
413 if (bnx2i_ep->conn) {
414 bnx2i_ep->conn->ep = NULL;
415 bnx2i_ep->conn = NULL;
416 }
417
418 bnx2i_ep->hba = NULL;
419 spin_unlock_irqrestore(&bnx2i_resc_lock, flags);
420 iscsi_destroy_endpoint(ep);
421 }
422
423
424 /**
425 * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
426 * @hba: adapter instance pointer
427 * @session: iscsi session pointer
428 * @cmd: iscsi command structure
429 */
430 static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,
431 struct bnx2i_cmd *cmd)
432 {
433 struct io_bdt *io = &cmd->io_tbl;
434 struct iscsi_bd *bd;
435
436 io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
437 ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),
438 &io->bd_tbl_dma, GFP_KERNEL);
439 if (!io->bd_tbl) {
440 iscsi_session_printk(KERN_ERR, session, "Could not "
441 "allocate bdt.\n");
442 return -ENOMEM;
443 }
444 io->bd_valid = 0;
445 return 0;
446 }
447
448 /**
449 * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
450 * @hba: adapter instance pointer
451 * @session: iscsi session pointer
452 * @cmd: iscsi command structure
453 */
454 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
455 struct iscsi_session *session)
456 {
457 int i;
458
459 for (i = 0; i < session->cmds_max; i++) {
460 struct iscsi_task *task = session->cmds[i];
461 struct bnx2i_cmd *cmd = task->dd_data;
462
463 if (cmd->io_tbl.bd_tbl)
464 dma_free_coherent(&hba->pcidev->dev,
465 ISCSI_MAX_BDS_PER_CMD *
466 sizeof(struct iscsi_bd),
467 cmd->io_tbl.bd_tbl,
468 cmd->io_tbl.bd_tbl_dma);
469 }
470
471 }
472
473
474 /**
475 * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
476 * @hba: adapter instance pointer
477 * @session: iscsi session pointer
478 */
479 static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
480 struct iscsi_session *session)
481 {
482 int i;
483
484 for (i = 0; i < session->cmds_max; i++) {
485 struct iscsi_task *task = session->cmds[i];
486 struct bnx2i_cmd *cmd = task->dd_data;
487
488 /* Anil */
489 task->hdr = &cmd->hdr;
490 task->hdr_max = sizeof(struct iscsi_hdr);
491
492 if (bnx2i_alloc_bdt(hba, session, cmd))
493 goto free_bdts;
494 }
495
496 return 0;
497
498 free_bdts:
499 bnx2i_destroy_cmd_pool(hba, session);
500 return -ENOMEM;
501 }
502
503
504 /**
505 * bnx2i_setup_mp_bdt - allocate BD table resources
506 * @hba: pointer to adapter structure
507 *
508 * Allocate memory for dummy buffer and associated BD
509 * table to be used by middle path (MP) requests
510 */
511 static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
512 {
513 int rc = 0;
514 struct iscsi_bd *mp_bdt;
515 u64 addr;
516
517 hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
518 &hba->mp_bd_dma, GFP_KERNEL);
519 if (!hba->mp_bd_tbl) {
520 printk(KERN_ERR "unable to allocate Middle Path BDT\n");
521 rc = -1;
522 goto out;
523 }
524
525 hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
526 &hba->dummy_buf_dma, GFP_KERNEL);
527 if (!hba->dummy_buffer) {
528 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
529 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
530 hba->mp_bd_tbl, hba->mp_bd_dma);
531 hba->mp_bd_tbl = NULL;
532 rc = -1;
533 goto out;
534 }
535
536 mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
537 addr = (unsigned long) hba->dummy_buf_dma;
538 mp_bdt->buffer_addr_lo = addr & 0xffffffff;
539 mp_bdt->buffer_addr_hi = addr >> 32;
540 mp_bdt->buffer_length = PAGE_SIZE;
541 mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
542 ISCSI_BD_FIRST_IN_BD_CHAIN;
543 out:
544 return rc;
545 }
546
547
548 /**
549 * bnx2i_free_mp_bdt - releases ITT back to free pool
550 * @hba: pointer to adapter instance
551 *
552 * free MP dummy buffer and associated BD table
553 */
554 static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
555 {
556 if (hba->mp_bd_tbl) {
557 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
558 hba->mp_bd_tbl, hba->mp_bd_dma);
559 hba->mp_bd_tbl = NULL;
560 }
561 if (hba->dummy_buffer) {
562 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
563 hba->dummy_buffer, hba->dummy_buf_dma);
564 hba->dummy_buffer = NULL;
565 }
566 return;
567 }
568
569 /**
570 * bnx2i_drop_session - notifies iscsid of connection error.
571 * @hba: adapter instance pointer
572 * @session: iscsi session pointer
573 *
574 * This notifies iscsid that there is a error, so it can initiate
575 * recovery.
576 *
577 * This relies on caller using the iscsi class iterator so the object
578 * is refcounted and does not disapper from under us.
579 */
580 void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
581 {
582 iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
583 }
584
585 /**
586 * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
587 * @hba: pointer to adapter instance
588 * @ep: pointer to endpoint (transport indentifier) structure
589 *
590 * EP destroy queue manager
591 */
592 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
593 struct bnx2i_endpoint *ep)
594 {
595 write_lock_bh(&hba->ep_rdwr_lock);
596 list_add_tail(&ep->link, &hba->ep_destroy_list);
597 write_unlock_bh(&hba->ep_rdwr_lock);
598 return 0;
599 }
600
601 /**
602 * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
603 *
604 * @hba: pointer to adapter instance
605 * @ep: pointer to endpoint (transport indentifier) structure
606 *
607 * EP destroy queue manager
608 */
609 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
610 struct bnx2i_endpoint *ep)
611 {
612 write_lock_bh(&hba->ep_rdwr_lock);
613 list_del_init(&ep->link);
614 write_unlock_bh(&hba->ep_rdwr_lock);
615
616 return 0;
617 }
618
619 /**
620 * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
621 * @hba: pointer to adapter instance
622 * @ep: pointer to endpoint (transport indentifier) structure
623 *
624 * pending conn offload completion queue manager
625 */
626 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
627 struct bnx2i_endpoint *ep)
628 {
629 write_lock_bh(&hba->ep_rdwr_lock);
630 list_add_tail(&ep->link, &hba->ep_ofld_list);
631 write_unlock_bh(&hba->ep_rdwr_lock);
632 return 0;
633 }
634
635 /**
636 * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
637 * @hba: pointer to adapter instance
638 * @ep: pointer to endpoint (transport indentifier) structure
639 *
640 * pending conn offload completion queue manager
641 */
642 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
643 struct bnx2i_endpoint *ep)
644 {
645 write_lock_bh(&hba->ep_rdwr_lock);
646 list_del_init(&ep->link);
647 write_unlock_bh(&hba->ep_rdwr_lock);
648 return 0;
649 }
650
651
652 /**
653 * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
654 *
655 * @hba: pointer to adapter instance
656 * @iscsi_cid: iscsi context ID to find
657 *
658 */
659 struct bnx2i_endpoint *
660 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
661 {
662 struct list_head *list;
663 struct list_head *tmp;
664 struct bnx2i_endpoint *ep;
665
666 read_lock_bh(&hba->ep_rdwr_lock);
667 list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
668 ep = (struct bnx2i_endpoint *)list;
669
670 if (ep->ep_iscsi_cid == iscsi_cid)
671 break;
672 ep = NULL;
673 }
674 read_unlock_bh(&hba->ep_rdwr_lock);
675
676 if (!ep)
677 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
678 return ep;
679 }
680
681
682 /**
683 * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
684 * @hba: pointer to adapter instance
685 * @iscsi_cid: iscsi context ID to find
686 *
687 */
688 struct bnx2i_endpoint *
689 bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
690 {
691 struct list_head *list;
692 struct list_head *tmp;
693 struct bnx2i_endpoint *ep;
694
695 read_lock_bh(&hba->ep_rdwr_lock);
696 list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
697 ep = (struct bnx2i_endpoint *)list;
698
699 if (ep->ep_iscsi_cid == iscsi_cid)
700 break;
701 ep = NULL;
702 }
703 read_unlock_bh(&hba->ep_rdwr_lock);
704
705 if (!ep)
706 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
707
708 return ep;
709 }
710
711 /**
712 * bnx2i_setup_host_queue_size - assigns shost->can_queue param
713 * @hba: pointer to adapter instance
714 * @shost: scsi host pointer
715 *
716 * Initializes 'can_queue' parameter based on how many outstanding commands
717 * the device can handle. Each device 5708/5709/57710 has different
718 * capabilities
719 */
720 static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
721 struct Scsi_Host *shost)
722 {
723 if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
724 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
725 else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
726 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
727 else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
728 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
729 else
730 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
731 }
732
733
734 /**
735 * bnx2i_alloc_hba - allocate and init adapter instance
736 * @cnic: cnic device pointer
737 *
738 * allocate & initialize adapter structure and call other
739 * support routines to do per adapter initialization
740 */
741 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
742 {
743 struct Scsi_Host *shost;
744 struct bnx2i_hba *hba;
745
746 shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
747 if (!shost)
748 return NULL;
749 shost->dma_boundary = cnic->pcidev->dma_mask;
750 shost->transportt = bnx2i_scsi_xport_template;
751 shost->max_id = ISCSI_MAX_CONNS_PER_HBA;
752 shost->max_channel = 0;
753 shost->max_lun = 512;
754 shost->max_cmd_len = 16;
755
756 hba = iscsi_host_priv(shost);
757 hba->shost = shost;
758 hba->netdev = cnic->netdev;
759 /* Get PCI related information and update hba struct members */
760 hba->pcidev = cnic->pcidev;
761 pci_dev_get(hba->pcidev);
762 hba->pci_did = hba->pcidev->device;
763 hba->pci_vid = hba->pcidev->vendor;
764 hba->pci_sdid = hba->pcidev->subsystem_device;
765 hba->pci_svid = hba->pcidev->subsystem_vendor;
766 hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
767 hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
768 bnx2i_identify_device(hba);
769
770 bnx2i_identify_device(hba);
771 bnx2i_setup_host_queue_size(hba, shost);
772
773 if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
774 hba->regview = ioremap_nocache(hba->netdev->base_addr,
775 BNX2_MQ_CONFIG2);
776 if (!hba->regview)
777 goto ioreg_map_err;
778 } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
779 hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096);
780 if (!hba->regview)
781 goto ioreg_map_err;
782 }
783
784 if (bnx2i_setup_mp_bdt(hba))
785 goto mp_bdt_mem_err;
786
787 INIT_LIST_HEAD(&hba->ep_ofld_list);
788 INIT_LIST_HEAD(&hba->ep_destroy_list);
789 rwlock_init(&hba->ep_rdwr_lock);
790
791 hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
792
793 /* different values for 5708/5709/57710 */
794 hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
795
796 if (bnx2i_setup_free_cid_que(hba))
797 goto cid_que_err;
798
799 /* SQ/RQ/CQ size can be changed via sysfx interface */
800 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
801 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
802 hba->max_sqes = sq_size;
803 else
804 hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
805 } else { /* 5706/5708/5709 */
806 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
807 hba->max_sqes = sq_size;
808 else
809 hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
810 }
811
812 hba->max_rqes = rq_size;
813 hba->max_cqes = hba->max_sqes + rq_size;
814 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
815 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
816 hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
817 } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
818 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
819
820 hba->num_ccell = hba->max_sqes / 2;
821
822 spin_lock_init(&hba->lock);
823 mutex_init(&hba->net_dev_lock);
824
825 if (iscsi_host_add(shost, &hba->pcidev->dev))
826 goto free_dump_mem;
827 return hba;
828
829 free_dump_mem:
830 bnx2i_release_free_cid_que(hba);
831 cid_que_err:
832 bnx2i_free_mp_bdt(hba);
833 mp_bdt_mem_err:
834 if (hba->regview) {
835 iounmap(hba->regview);
836 hba->regview = NULL;
837 }
838 ioreg_map_err:
839 pci_dev_put(hba->pcidev);
840 scsi_host_put(shost);
841 return NULL;
842 }
843
844 /**
845 * bnx2i_free_hba- releases hba structure and resources held by the adapter
846 * @hba: pointer to adapter instance
847 *
848 * free adapter structure and call various cleanup routines.
849 */
850 void bnx2i_free_hba(struct bnx2i_hba *hba)
851 {
852 struct Scsi_Host *shost = hba->shost;
853
854 iscsi_host_remove(shost);
855 INIT_LIST_HEAD(&hba->ep_ofld_list);
856 INIT_LIST_HEAD(&hba->ep_destroy_list);
857 pci_dev_put(hba->pcidev);
858
859 if (hba->regview) {
860 iounmap(hba->regview);
861 hba->regview = NULL;
862 }
863 bnx2i_free_mp_bdt(hba);
864 bnx2i_release_free_cid_que(hba);
865 iscsi_host_free(shost);
866 }
867
868 /**
869 * bnx2i_conn_free_login_resources - free DMA resources used for login process
870 * @hba: pointer to adapter instance
871 * @bnx2i_conn: iscsi connection pointer
872 *
873 * Login related resources, mostly BDT & payload DMA memory is freed
874 */
875 static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
876 struct bnx2i_conn *bnx2i_conn)
877 {
878 if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
879 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
880 bnx2i_conn->gen_pdu.resp_bd_tbl,
881 bnx2i_conn->gen_pdu.resp_bd_dma);
882 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
883 }
884
885 if (bnx2i_conn->gen_pdu.req_bd_tbl) {
886 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
887 bnx2i_conn->gen_pdu.req_bd_tbl,
888 bnx2i_conn->gen_pdu.req_bd_dma);
889 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
890 }
891
892 if (bnx2i_conn->gen_pdu.resp_buf) {
893 dma_free_coherent(&hba->pcidev->dev,
894 ISCSI_DEF_MAX_RECV_SEG_LEN,
895 bnx2i_conn->gen_pdu.resp_buf,
896 bnx2i_conn->gen_pdu.resp_dma_addr);
897 bnx2i_conn->gen_pdu.resp_buf = NULL;
898 }
899
900 if (bnx2i_conn->gen_pdu.req_buf) {
901 dma_free_coherent(&hba->pcidev->dev,
902 ISCSI_DEF_MAX_RECV_SEG_LEN,
903 bnx2i_conn->gen_pdu.req_buf,
904 bnx2i_conn->gen_pdu.req_dma_addr);
905 bnx2i_conn->gen_pdu.req_buf = NULL;
906 }
907 }
908
909 /**
910 * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
911 * @hba: pointer to adapter instance
912 * @bnx2i_conn: iscsi connection pointer
913 *
914 * Mgmt task DNA resources are allocated in this routine.
915 */
916 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
917 struct bnx2i_conn *bnx2i_conn)
918 {
919 /* Allocate memory for login request/response buffers */
920 bnx2i_conn->gen_pdu.req_buf =
921 dma_alloc_coherent(&hba->pcidev->dev,
922 ISCSI_DEF_MAX_RECV_SEG_LEN,
923 &bnx2i_conn->gen_pdu.req_dma_addr,
924 GFP_KERNEL);
925 if (bnx2i_conn->gen_pdu.req_buf == NULL)
926 goto login_req_buf_failure;
927
928 bnx2i_conn->gen_pdu.req_buf_size = 0;
929 bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
930
931 bnx2i_conn->gen_pdu.resp_buf =
932 dma_alloc_coherent(&hba->pcidev->dev,
933 ISCSI_DEF_MAX_RECV_SEG_LEN,
934 &bnx2i_conn->gen_pdu.resp_dma_addr,
935 GFP_KERNEL);
936 if (bnx2i_conn->gen_pdu.resp_buf == NULL)
937 goto login_resp_buf_failure;
938
939 bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
940 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
941
942 bnx2i_conn->gen_pdu.req_bd_tbl =
943 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
944 &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
945 if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
946 goto login_req_bd_tbl_failure;
947
948 bnx2i_conn->gen_pdu.resp_bd_tbl =
949 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
950 &bnx2i_conn->gen_pdu.resp_bd_dma,
951 GFP_KERNEL);
952 if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
953 goto login_resp_bd_tbl_failure;
954
955 return 0;
956
957 login_resp_bd_tbl_failure:
958 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
959 bnx2i_conn->gen_pdu.req_bd_tbl,
960 bnx2i_conn->gen_pdu.req_bd_dma);
961 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
962
963 login_req_bd_tbl_failure:
964 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
965 bnx2i_conn->gen_pdu.resp_buf,
966 bnx2i_conn->gen_pdu.resp_dma_addr);
967 bnx2i_conn->gen_pdu.resp_buf = NULL;
968 login_resp_buf_failure:
969 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
970 bnx2i_conn->gen_pdu.req_buf,
971 bnx2i_conn->gen_pdu.req_dma_addr);
972 bnx2i_conn->gen_pdu.req_buf = NULL;
973 login_req_buf_failure:
974 iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
975 "login resource alloc failed!!\n");
976 return -ENOMEM;
977
978 }
979
980
981 /**
982 * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
983 * @bnx2i_conn: iscsi connection pointer
984 *
985 * Allocates buffers and BD tables before shipping requests to cnic
986 * for PDUs prepared by 'iscsid' daemon
987 */
988 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
989 {
990 struct iscsi_bd *bd_tbl;
991
992 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
993
994 bd_tbl->buffer_addr_hi =
995 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
996 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
997 bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
998 bnx2i_conn->gen_pdu.req_buf;
999 bd_tbl->reserved0 = 0;
1000 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1001 ISCSI_BD_FIRST_IN_BD_CHAIN;
1002
1003 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1004 bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1005 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1006 bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1007 bd_tbl->reserved0 = 0;
1008 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1009 ISCSI_BD_FIRST_IN_BD_CHAIN;
1010 }
1011
1012
1013 /**
1014 * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1015 * @task: transport layer task pointer
1016 *
1017 * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1018 * Nop-out and Logout requests flow through this path.
1019 */
1020 static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1021 {
1022 struct bnx2i_cmd *cmd = task->dd_data;
1023 struct bnx2i_conn *bnx2i_conn = cmd->conn;
1024 int rc = 0;
1025 char *buf;
1026 int data_len;
1027
1028 bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1029 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1030 case ISCSI_OP_LOGIN:
1031 bnx2i_send_iscsi_login(bnx2i_conn, task);
1032 break;
1033 case ISCSI_OP_NOOP_OUT:
1034 data_len = bnx2i_conn->gen_pdu.req_buf_size;
1035 buf = bnx2i_conn->gen_pdu.req_buf;
1036 if (data_len)
1037 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1038 RESERVED_ITT,
1039 buf, data_len, 1);
1040 else
1041 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1042 RESERVED_ITT,
1043 NULL, 0, 1);
1044 break;
1045 case ISCSI_OP_LOGOUT:
1046 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1047 break;
1048 case ISCSI_OP_SCSI_TMFUNC:
1049 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1050 break;
1051 default:
1052 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1053 "send_gen: unsupported op 0x%x\n",
1054 task->hdr->opcode);
1055 }
1056 return rc;
1057 }
1058
1059
1060 /**********************************************************************
1061 * SCSI-ML Interface
1062 **********************************************************************/
1063
1064 /**
1065 * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1066 * @sc: SCSI-ML command pointer
1067 * @cmd: iscsi cmd pointer
1068 */
1069 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1070 {
1071 u32 dword;
1072 int lpcnt;
1073 u8 *srcp;
1074 u32 *dstp;
1075 u32 scsi_lun[2];
1076
1077 int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1078 cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1079 cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1080
1081 lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1082 srcp = (u8 *) sc->cmnd;
1083 dstp = (u32 *) cmd->req.cdb;
1084 while (lpcnt--) {
1085 memcpy(&dword, (const void *) srcp, 4);
1086 *dstp = cpu_to_be32(dword);
1087 srcp += 4;
1088 dstp++;
1089 }
1090 if (sc->cmd_len & 0x3) {
1091 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1092 *dstp = cpu_to_be32(dword);
1093 }
1094 }
1095
1096 static void bnx2i_cleanup_task(struct iscsi_task *task)
1097 {
1098 struct iscsi_conn *conn = task->conn;
1099 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1100 struct bnx2i_hba *hba = bnx2i_conn->hba;
1101
1102 /*
1103 * mgmt task or cmd was never sent to us to transmit.
1104 */
1105 if (!task->sc || task->state == ISCSI_TASK_PENDING)
1106 return;
1107 /*
1108 * need to clean-up task context to claim dma buffers
1109 */
1110 if (task->state == ISCSI_TASK_ABRT_TMF) {
1111 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1112
1113 spin_unlock_bh(&conn->session->lock);
1114 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1115 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1116 spin_lock_bh(&conn->session->lock);
1117 }
1118 bnx2i_iscsi_unmap_sg_list(task->dd_data);
1119 }
1120
1121 /**
1122 * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1123 * @conn: transport layer conn structure pointer
1124 * @task: transport layer command structure pointer
1125 */
1126 static int
1127 bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1128 {
1129 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1130 struct bnx2i_cmd *cmd = task->dd_data;
1131
1132 memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1133
1134 bnx2i_setup_cmd_wqe_template(cmd);
1135 bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1136 if (task->data_count) {
1137 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1138 task->data_count);
1139 bnx2i_conn->gen_pdu.req_wr_ptr =
1140 bnx2i_conn->gen_pdu.req_buf + task->data_count;
1141 }
1142 cmd->conn = conn->dd_data;
1143 cmd->scsi_cmd = NULL;
1144 return bnx2i_iscsi_send_generic_request(task);
1145 }
1146
1147 /**
1148 * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1149 * @task: transport layer command structure pointer
1150 *
1151 * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1152 */
1153 static int bnx2i_task_xmit(struct iscsi_task *task)
1154 {
1155 struct iscsi_conn *conn = task->conn;
1156 struct iscsi_session *session = conn->session;
1157 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1158 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1159 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1160 struct scsi_cmnd *sc = task->sc;
1161 struct bnx2i_cmd *cmd = task->dd_data;
1162 struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr;
1163
1164 if (!bnx2i_conn->is_bound)
1165 return -ENOTCONN;
1166
1167 /*
1168 * If there is no scsi_cmnd this must be a mgmt task
1169 */
1170 if (!sc)
1171 return bnx2i_mtask_xmit(conn, task);
1172
1173 bnx2i_setup_cmd_wqe_template(cmd);
1174 cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1175 cmd->conn = bnx2i_conn;
1176 cmd->scsi_cmd = sc;
1177 cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1178 cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1179
1180 bnx2i_iscsi_map_sg_list(cmd);
1181 bnx2i_cpy_scsi_cdb(sc, cmd);
1182
1183 cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1184 if (sc->sc_data_direction == DMA_TO_DEVICE) {
1185 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1186 cmd->req.itt = task->itt |
1187 (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1188 bnx2i_setup_write_cmd_bd_info(task);
1189 } else {
1190 if (scsi_bufflen(sc))
1191 cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1192 cmd->req.itt = task->itt |
1193 (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1194 }
1195
1196 cmd->req.num_bds = cmd->io_tbl.bd_valid;
1197 if (!cmd->io_tbl.bd_valid) {
1198 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1199 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1200 cmd->req.num_bds = 1;
1201 }
1202
1203 bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1204 return 0;
1205 }
1206
1207 /**
1208 * bnx2i_session_create - create a new iscsi session
1209 * @cmds_max: max commands supported
1210 * @qdepth: scsi queue depth to support
1211 * @initial_cmdsn: initial iscsi CMDSN to be used for this session
1212 *
1213 * Creates a new iSCSI session instance on given device.
1214 */
1215 static struct iscsi_cls_session *
1216 bnx2i_session_create(struct iscsi_endpoint *ep,
1217 uint16_t cmds_max, uint16_t qdepth,
1218 uint32_t initial_cmdsn)
1219 {
1220 struct Scsi_Host *shost;
1221 struct iscsi_cls_session *cls_session;
1222 struct bnx2i_hba *hba;
1223 struct bnx2i_endpoint *bnx2i_ep;
1224
1225 if (!ep) {
1226 printk(KERN_ERR "bnx2i: missing ep.\n");
1227 return NULL;
1228 }
1229
1230 bnx2i_ep = ep->dd_data;
1231 shost = bnx2i_ep->hba->shost;
1232 hba = iscsi_host_priv(shost);
1233 if (bnx2i_adapter_ready(hba))
1234 return NULL;
1235
1236 /*
1237 * user can override hw limit as long as it is within
1238 * the min/max.
1239 */
1240 if (cmds_max > hba->max_sqes)
1241 cmds_max = hba->max_sqes;
1242 else if (cmds_max < BNX2I_SQ_WQES_MIN)
1243 cmds_max = BNX2I_SQ_WQES_MIN;
1244
1245 cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1246 cmds_max, 0, sizeof(struct bnx2i_cmd),
1247 initial_cmdsn, ISCSI_MAX_TARGET);
1248 if (!cls_session)
1249 return NULL;
1250
1251 if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1252 goto session_teardown;
1253 return cls_session;
1254
1255 session_teardown:
1256 iscsi_session_teardown(cls_session);
1257 return NULL;
1258 }
1259
1260
1261 /**
1262 * bnx2i_session_destroy - destroys iscsi session
1263 * @cls_session: pointer to iscsi cls session
1264 *
1265 * Destroys previously created iSCSI session instance and releases
1266 * all resources held by it
1267 */
1268 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1269 {
1270 struct iscsi_session *session = cls_session->dd_data;
1271 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1272 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1273
1274 bnx2i_destroy_cmd_pool(hba, session);
1275 iscsi_session_teardown(cls_session);
1276 }
1277
1278
1279 /**
1280 * bnx2i_conn_create - create iscsi connection instance
1281 * @cls_session: pointer to iscsi cls session
1282 * @cid: iscsi cid as per rfc (not NX2's CID terminology)
1283 *
1284 * Creates a new iSCSI connection instance for a given session
1285 */
1286 static struct iscsi_cls_conn *
1287 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1288 {
1289 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1290 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1291 struct bnx2i_conn *bnx2i_conn;
1292 struct iscsi_cls_conn *cls_conn;
1293 struct iscsi_conn *conn;
1294
1295 cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1296 cid);
1297 if (!cls_conn)
1298 return NULL;
1299 conn = cls_conn->dd_data;
1300
1301 bnx2i_conn = conn->dd_data;
1302 bnx2i_conn->cls_conn = cls_conn;
1303 bnx2i_conn->hba = hba;
1304 /* 'ep' ptr will be assigned in bind() call */
1305 bnx2i_conn->ep = NULL;
1306 init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1307
1308 if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1309 iscsi_conn_printk(KERN_ALERT, conn,
1310 "conn_new: login resc alloc failed!!\n");
1311 goto free_conn;
1312 }
1313
1314 return cls_conn;
1315
1316 free_conn:
1317 iscsi_conn_teardown(cls_conn);
1318 return NULL;
1319 }
1320
1321 /**
1322 * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1323 * @cls_session: pointer to iscsi cls session
1324 * @cls_conn: pointer to iscsi cls conn
1325 * @transport_fd: 64-bit EP handle
1326 * @is_leading: leading connection on this session?
1327 *
1328 * Binds together iSCSI session instance, iSCSI connection instance
1329 * and the TCP connection. This routine returns error code if
1330 * TCP connection does not belong on the device iSCSI sess/conn
1331 * is bound
1332 */
1333 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1334 struct iscsi_cls_conn *cls_conn,
1335 uint64_t transport_fd, int is_leading)
1336 {
1337 struct iscsi_conn *conn = cls_conn->dd_data;
1338 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1339 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1340 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1341 struct bnx2i_endpoint *bnx2i_ep;
1342 struct iscsi_endpoint *ep;
1343 int ret_code;
1344
1345 ep = iscsi_lookup_endpoint(transport_fd);
1346 if (!ep)
1347 return -EINVAL;
1348
1349 bnx2i_ep = ep->dd_data;
1350 if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1351 (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1352 /* Peer disconnect via' FIN or RST */
1353 return -EINVAL;
1354
1355 if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1356 return -EINVAL;
1357
1358 if (bnx2i_ep->hba != hba) {
1359 /* Error - TCP connection does not belong to this device
1360 */
1361 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1362 "conn bind, ep=0x%p (%s) does not",
1363 bnx2i_ep, bnx2i_ep->hba->netdev->name);
1364 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1365 "belong to hba (%s)\n",
1366 hba->netdev->name);
1367 return -EEXIST;
1368 }
1369
1370 bnx2i_ep->conn = bnx2i_conn;
1371 bnx2i_conn->ep = bnx2i_ep;
1372 bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1373 bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1374 bnx2i_conn->is_bound = 1;
1375
1376 ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1377 bnx2i_ep->ep_iscsi_cid);
1378
1379 /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1380 * driver needs to explicitly replenish RQ index during setup.
1381 */
1382 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1383 bnx2i_put_rq_buf(bnx2i_conn, 0);
1384
1385 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1386 return ret_code;
1387 }
1388
1389
1390 /**
1391 * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1392 * @cls_conn: pointer to iscsi cls conn
1393 *
1394 * Destroy an iSCSI connection instance and release memory resources held by
1395 * this connection
1396 */
1397 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1398 {
1399 struct iscsi_conn *conn = cls_conn->dd_data;
1400 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1401 struct Scsi_Host *shost;
1402 struct bnx2i_hba *hba;
1403
1404 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1405 hba = iscsi_host_priv(shost);
1406
1407 bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1408 iscsi_conn_teardown(cls_conn);
1409 }
1410
1411
1412 /**
1413 * bnx2i_conn_get_param - return iscsi connection parameter to caller
1414 * @cls_conn: pointer to iscsi cls conn
1415 * @param: parameter type identifier
1416 * @buf: buffer pointer
1417 *
1418 * returns iSCSI connection parameters
1419 */
1420 static int bnx2i_conn_get_param(struct iscsi_cls_conn *cls_conn,
1421 enum iscsi_param param, char *buf)
1422 {
1423 struct iscsi_conn *conn = cls_conn->dd_data;
1424 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1425 int len = 0;
1426
1427 switch (param) {
1428 case ISCSI_PARAM_CONN_PORT:
1429 if (bnx2i_conn->ep)
1430 len = sprintf(buf, "%hu\n",
1431 bnx2i_conn->ep->cm_sk->dst_port);
1432 break;
1433 case ISCSI_PARAM_CONN_ADDRESS:
1434 if (bnx2i_conn->ep)
1435 len = sprintf(buf, NIPQUAD_FMT "\n",
1436 NIPQUAD(bnx2i_conn->ep->cm_sk->dst_ip));
1437 break;
1438 default:
1439 return iscsi_conn_get_param(cls_conn, param, buf);
1440 }
1441
1442 return len;
1443 }
1444
1445 /**
1446 * bnx2i_host_get_param - returns host (adapter) related parameters
1447 * @shost: scsi host pointer
1448 * @param: parameter type identifier
1449 * @buf: buffer pointer
1450 */
1451 static int bnx2i_host_get_param(struct Scsi_Host *shost,
1452 enum iscsi_host_param param, char *buf)
1453 {
1454 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1455 int len = 0;
1456
1457 switch (param) {
1458 case ISCSI_HOST_PARAM_HWADDRESS:
1459 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1460 break;
1461 case ISCSI_HOST_PARAM_NETDEV_NAME:
1462 len = sprintf(buf, "%s\n", hba->netdev->name);
1463 break;
1464 default:
1465 return iscsi_host_get_param(shost, param, buf);
1466 }
1467 return len;
1468 }
1469
1470 /**
1471 * bnx2i_conn_start - completes iscsi connection migration to FFP
1472 * @cls_conn: pointer to iscsi cls conn
1473 *
1474 * last call in FFP migration to handover iscsi conn to the driver
1475 */
1476 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1477 {
1478 struct iscsi_conn *conn = cls_conn->dd_data;
1479 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1480
1481 bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1482 bnx2i_update_iscsi_conn(conn);
1483
1484 /*
1485 * this should normally not sleep for a long time so it should
1486 * not disrupt the caller.
1487 */
1488 bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1489 bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1490 bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
1491 add_timer(&bnx2i_conn->ep->ofld_timer);
1492 /* update iSCSI context for this conn, wait for CNIC to complete */
1493 wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1494 bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1495
1496 if (signal_pending(current))
1497 flush_signals(current);
1498 del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1499
1500 iscsi_conn_start(cls_conn);
1501 return 0;
1502 }
1503
1504
1505 /**
1506 * bnx2i_conn_get_stats - returns iSCSI stats
1507 * @cls_conn: pointer to iscsi cls conn
1508 * @stats: pointer to iscsi statistic struct
1509 */
1510 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1511 struct iscsi_stats *stats)
1512 {
1513 struct iscsi_conn *conn = cls_conn->dd_data;
1514
1515 stats->txdata_octets = conn->txdata_octets;
1516 stats->rxdata_octets = conn->rxdata_octets;
1517 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1518 stats->dataout_pdus = conn->dataout_pdus_cnt;
1519 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1520 stats->datain_pdus = conn->datain_pdus_cnt;
1521 stats->r2t_pdus = conn->r2t_pdus_cnt;
1522 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1523 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1524 stats->custom_length = 3;
1525 strcpy(stats->custom[2].desc, "eh_abort_cnt");
1526 stats->custom[2].value = conn->eh_abort_cnt;
1527 stats->digest_err = 0;
1528 stats->timeout_err = 0;
1529 stats->custom_length = 0;
1530 }
1531
1532
1533 /**
1534 * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1535 * @dst_addr: target IP address
1536 *
1537 * check if route resolves to BNX2 device
1538 */
1539 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1540 {
1541 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1542 struct bnx2i_hba *hba;
1543 struct cnic_dev *cnic = NULL;
1544
1545 bnx2i_reg_dev_all();
1546
1547 hba = get_adapter_list_head();
1548 if (hba && hba->cnic)
1549 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1550 if (!cnic) {
1551 printk(KERN_ALERT "bnx2i: no route,"
1552 "can't connect using cnic\n");
1553 goto no_nx2_route;
1554 }
1555 hba = bnx2i_find_hba_for_cnic(cnic);
1556 if (!hba)
1557 goto no_nx2_route;
1558
1559 if (bnx2i_adapter_ready(hba)) {
1560 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1561 goto no_nx2_route;
1562 }
1563 if (hba->netdev->mtu > hba->mtu_supported) {
1564 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1565 hba->netdev->name, hba->netdev->mtu);
1566 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1567 hba->mtu_supported);
1568 goto no_nx2_route;
1569 }
1570 return hba;
1571 no_nx2_route:
1572 return NULL;
1573 }
1574
1575
1576 /**
1577 * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1578 * @hba: pointer to adapter instance
1579 * @ep: endpoint (transport indentifier) structure
1580 *
1581 * destroys cm_sock structure and on chip iscsi context
1582 */
1583 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1584 struct bnx2i_endpoint *ep)
1585 {
1586 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
1587 hba->cnic->cm_destroy(ep->cm_sk);
1588
1589 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
1590 ep->state = EP_STATE_DISCONN_COMPL;
1591
1592 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1593 ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1594 printk(KERN_ALERT "bnx2i - ERROR - please submit GRC Dump,"
1595 " NW/PCIe trace, driver msgs to developers"
1596 " for analysis\n");
1597 return 1;
1598 }
1599
1600 ep->state = EP_STATE_CLEANUP_START;
1601 init_timer(&ep->ofld_timer);
1602 ep->ofld_timer.expires = 10*HZ + jiffies;
1603 ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1604 ep->ofld_timer.data = (unsigned long) ep;
1605 add_timer(&ep->ofld_timer);
1606
1607 bnx2i_ep_destroy_list_add(hba, ep);
1608
1609 /* destroy iSCSI context, wait for it to complete */
1610 bnx2i_send_conn_destroy(hba, ep);
1611 wait_event_interruptible(ep->ofld_wait,
1612 (ep->state != EP_STATE_CLEANUP_START));
1613
1614 if (signal_pending(current))
1615 flush_signals(current);
1616 del_timer_sync(&ep->ofld_timer);
1617
1618 bnx2i_ep_destroy_list_del(hba, ep);
1619
1620 if (ep->state != EP_STATE_CLEANUP_CMPL)
1621 /* should never happen */
1622 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1623
1624 return 0;
1625 }
1626
1627
1628 /**
1629 * bnx2i_ep_connect - establish TCP connection to target portal
1630 * @shost: scsi host
1631 * @dst_addr: target IP address
1632 * @non_blocking: blocking or non-blocking call
1633 *
1634 * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1635 * with l5_core and the CNIC. This is a multi-step process of resolving
1636 * route to target, create a iscsi connection context, handshaking with
1637 * CNIC module to create/initialize the socket struct and finally
1638 * sending down option-2 request to complete TCP 3-way handshake
1639 */
1640 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1641 struct sockaddr *dst_addr,
1642 int non_blocking)
1643 {
1644 u32 iscsi_cid = BNX2I_CID_RESERVED;
1645 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1646 struct sockaddr_in6 *desti6;
1647 struct bnx2i_endpoint *bnx2i_ep;
1648 struct bnx2i_hba *hba;
1649 struct cnic_dev *cnic;
1650 struct cnic_sockaddr saddr;
1651 struct iscsi_endpoint *ep;
1652 int rc = 0;
1653
1654 if (shost) {
1655 /* driver is given scsi host to work with */
1656 hba = iscsi_host_priv(shost);
1657 /* Register the device with cnic if not already done so */
1658 bnx2i_register_device(hba);
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
1666 if (!hba) {
1667 rc = -ENOMEM;
1668 goto check_busy;
1669 }
1670
1671 cnic = hba->cnic;
1672 ep = bnx2i_alloc_ep(hba);
1673 if (!ep) {
1674 rc = -ENOMEM;
1675 goto check_busy;
1676 }
1677 bnx2i_ep = ep->dd_data;
1678
1679 mutex_lock(&hba->net_dev_lock);
1680 if (bnx2i_adapter_ready(hba)) {
1681 rc = -EPERM;
1682 goto net_if_down;
1683 }
1684
1685 bnx2i_ep->num_active_cmds = 0;
1686 iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1687 if (iscsi_cid == -1) {
1688 printk(KERN_ALERT "alloc_ep: unable to allocate iscsi cid\n");
1689 rc = -ENOMEM;
1690 goto iscsi_cid_err;
1691 }
1692 bnx2i_ep->hba_age = hba->age;
1693
1694 rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1695 if (rc != 0) {
1696 printk(KERN_ALERT "bnx2i: ep_conn, alloc QP resc error\n");
1697 rc = -ENOMEM;
1698 goto qp_resc_err;
1699 }
1700
1701 bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1702 bnx2i_ep->state = EP_STATE_OFLD_START;
1703 bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1704
1705 init_timer(&bnx2i_ep->ofld_timer);
1706 bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1707 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1708 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1709 add_timer(&bnx2i_ep->ofld_timer);
1710
1711 bnx2i_send_conn_ofld_req(hba, bnx2i_ep);
1712
1713 /* Wait for CNIC hardware to setup conn context and return 'cid' */
1714 wait_event_interruptible(bnx2i_ep->ofld_wait,
1715 bnx2i_ep->state != EP_STATE_OFLD_START);
1716
1717 if (signal_pending(current))
1718 flush_signals(current);
1719 del_timer_sync(&bnx2i_ep->ofld_timer);
1720
1721 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1722
1723 if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1724 rc = -ENOSPC;
1725 goto conn_failed;
1726 }
1727
1728 rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1729 iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1730 if (rc) {
1731 rc = -EINVAL;
1732 goto conn_failed;
1733 }
1734
1735 bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1736 bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1737 clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1738
1739 memset(&saddr, 0, sizeof(saddr));
1740 if (dst_addr->sa_family == AF_INET) {
1741 desti = (struct sockaddr_in *) dst_addr;
1742 saddr.remote.v4 = *desti;
1743 saddr.local.v4.sin_family = desti->sin_family;
1744 } else if (dst_addr->sa_family == AF_INET6) {
1745 desti6 = (struct sockaddr_in6 *) dst_addr;
1746 saddr.remote.v6 = *desti6;
1747 saddr.local.v6.sin6_family = desti6->sin6_family;
1748 }
1749
1750 bnx2i_ep->timestamp = jiffies;
1751 bnx2i_ep->state = EP_STATE_CONNECT_START;
1752 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1753 rc = -EINVAL;
1754 goto conn_failed;
1755 } else
1756 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1757
1758 if (rc)
1759 goto release_ep;
1760
1761 if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
1762 goto release_ep;
1763 mutex_unlock(&hba->net_dev_lock);
1764 return ep;
1765
1766 release_ep:
1767 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1768 mutex_unlock(&hba->net_dev_lock);
1769 return ERR_PTR(rc);
1770 }
1771 conn_failed:
1772 net_if_down:
1773 iscsi_cid_err:
1774 bnx2i_free_qp_resc(hba, bnx2i_ep);
1775 qp_resc_err:
1776 bnx2i_free_ep(ep);
1777 mutex_unlock(&hba->net_dev_lock);
1778 check_busy:
1779 bnx2i_unreg_dev_all();
1780 return ERR_PTR(rc);
1781 }
1782
1783
1784 /**
1785 * bnx2i_ep_poll - polls for TCP connection establishement
1786 * @ep: TCP connection (endpoint) handle
1787 * @timeout_ms: timeout value in milli secs
1788 *
1789 * polls for TCP connect request to complete
1790 */
1791 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1792 {
1793 struct bnx2i_endpoint *bnx2i_ep;
1794 int rc = 0;
1795
1796 bnx2i_ep = ep->dd_data;
1797 if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1798 (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1799 (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1800 return -1;
1801 if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1802 return 1;
1803
1804 rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1805 ((bnx2i_ep->state ==
1806 EP_STATE_OFLD_FAILED) ||
1807 (bnx2i_ep->state ==
1808 EP_STATE_CONNECT_FAILED) ||
1809 (bnx2i_ep->state ==
1810 EP_STATE_CONNECT_COMPL)),
1811 msecs_to_jiffies(timeout_ms));
1812 if (!rc || (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1813 rc = -1;
1814
1815 if (rc > 0)
1816 return 1;
1817 else if (!rc)
1818 return 0; /* timeout */
1819 else
1820 return rc;
1821 }
1822
1823
1824 /**
1825 * bnx2i_ep_tcp_conn_active - check EP state transition
1826 * @ep: endpoint pointer
1827 *
1828 * check if underlying TCP connection is active
1829 */
1830 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1831 {
1832 int ret;
1833 int cnic_dev_10g = 0;
1834
1835 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1836 cnic_dev_10g = 1;
1837
1838 switch (bnx2i_ep->state) {
1839 case EP_STATE_CONNECT_START:
1840 case EP_STATE_CLEANUP_FAILED:
1841 case EP_STATE_OFLD_FAILED:
1842 case EP_STATE_DISCONN_TIMEDOUT:
1843 ret = 0;
1844 break;
1845 case EP_STATE_CONNECT_COMPL:
1846 case EP_STATE_ULP_UPDATE_START:
1847 case EP_STATE_ULP_UPDATE_COMPL:
1848 case EP_STATE_TCP_FIN_RCVD:
1849 case EP_STATE_ULP_UPDATE_FAILED:
1850 ret = 1;
1851 break;
1852 case EP_STATE_TCP_RST_RCVD:
1853 ret = 0;
1854 break;
1855 case EP_STATE_CONNECT_FAILED:
1856 if (cnic_dev_10g)
1857 ret = 1;
1858 else
1859 ret = 0;
1860 break;
1861 default:
1862 ret = 0;
1863 }
1864
1865 return ret;
1866 }
1867
1868
1869 /**
1870 * bnx2i_ep_disconnect - executes TCP connection teardown process
1871 * @ep: TCP connection (endpoint) handle
1872 *
1873 * executes TCP connection teardown process
1874 */
1875 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
1876 {
1877 struct bnx2i_endpoint *bnx2i_ep;
1878 struct bnx2i_conn *bnx2i_conn = NULL;
1879 struct iscsi_session *session = NULL;
1880 struct iscsi_conn *conn;
1881 struct cnic_dev *cnic;
1882 struct bnx2i_hba *hba;
1883
1884 bnx2i_ep = ep->dd_data;
1885
1886 /* driver should not attempt connection cleanup untill TCP_CONNECT
1887 * completes either successfully or fails. Timeout is 9-secs, so
1888 * wait for it to complete
1889 */
1890 while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
1891 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
1892 msleep(250);
1893
1894 if (bnx2i_ep->conn) {
1895 bnx2i_conn = bnx2i_ep->conn;
1896 conn = bnx2i_conn->cls_conn->dd_data;
1897 session = conn->session;
1898
1899 spin_lock_bh(&session->lock);
1900 bnx2i_conn->is_bound = 0;
1901 spin_unlock_bh(&session->lock);
1902 }
1903
1904 hba = bnx2i_ep->hba;
1905 if (bnx2i_ep->state == EP_STATE_IDLE)
1906 goto return_bnx2i_ep;
1907 cnic = hba->cnic;
1908
1909 mutex_lock(&hba->net_dev_lock);
1910
1911 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
1912 goto free_resc;
1913 if (bnx2i_ep->hba_age != hba->age)
1914 goto free_resc;
1915
1916 if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
1917 goto destory_conn;
1918
1919 bnx2i_ep->state = EP_STATE_DISCONN_START;
1920
1921 init_timer(&bnx2i_ep->ofld_timer);
1922 bnx2i_ep->ofld_timer.expires = 10*HZ + jiffies;
1923 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1924 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1925 add_timer(&bnx2i_ep->ofld_timer);
1926
1927 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1928 int close = 0;
1929
1930 if (session) {
1931 spin_lock_bh(&session->lock);
1932 if (session->state == ISCSI_STATE_LOGGING_OUT)
1933 close = 1;
1934 spin_unlock_bh(&session->lock);
1935 }
1936 if (close)
1937 cnic->cm_close(bnx2i_ep->cm_sk);
1938 else
1939 cnic->cm_abort(bnx2i_ep->cm_sk);
1940 } else
1941 goto free_resc;
1942
1943 /* wait for option-2 conn teardown */
1944 wait_event_interruptible(bnx2i_ep->ofld_wait,
1945 bnx2i_ep->state != EP_STATE_DISCONN_START);
1946
1947 if (signal_pending(current))
1948 flush_signals(current);
1949 del_timer_sync(&bnx2i_ep->ofld_timer);
1950
1951 destory_conn:
1952 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1953 mutex_unlock(&hba->net_dev_lock);
1954 return;
1955 }
1956 free_resc:
1957 mutex_unlock(&hba->net_dev_lock);
1958 bnx2i_free_qp_resc(hba, bnx2i_ep);
1959 return_bnx2i_ep:
1960 if (bnx2i_conn)
1961 bnx2i_conn->ep = NULL;
1962
1963 bnx2i_free_ep(ep);
1964
1965 if (!hba->ofld_conns_active)
1966 bnx2i_unreg_dev_all();
1967 }
1968
1969
1970 /**
1971 * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
1972 * @buf: pointer to buffer containing iscsi path message
1973 *
1974 */
1975 static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
1976 {
1977 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1978 char *buf = (char *) params;
1979 u16 len = sizeof(*params);
1980
1981 /* handled by cnic driver */
1982 hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
1983 len);
1984
1985 return 0;
1986 }
1987
1988
1989 /*
1990 * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
1991 * used while registering with the scsi host and iSCSI transport module.
1992 */
1993 static struct scsi_host_template bnx2i_host_template = {
1994 .module = THIS_MODULE,
1995 .name = "Broadcom Offload iSCSI Initiator",
1996 .proc_name = "bnx2i",
1997 .queuecommand = iscsi_queuecommand,
1998 .eh_abort_handler = iscsi_eh_abort,
1999 .eh_device_reset_handler = iscsi_eh_device_reset,
2000 .eh_target_reset_handler = iscsi_eh_target_reset,
2001 .can_queue = 1024,
2002 .max_sectors = 127,
2003 .cmd_per_lun = 32,
2004 .this_id = -1,
2005 .use_clustering = ENABLE_CLUSTERING,
2006 .sg_tablesize = ISCSI_MAX_BDS_PER_CMD,
2007 .shost_attrs = bnx2i_dev_attributes,
2008 };
2009
2010 struct iscsi_transport bnx2i_iscsi_transport = {
2011 .owner = THIS_MODULE,
2012 .name = "bnx2i",
2013 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST |
2014 CAP_MULTI_R2T | CAP_DATADGST |
2015 CAP_DATA_PATH_OFFLOAD,
2016 .param_mask = ISCSI_MAX_RECV_DLENGTH |
2017 ISCSI_MAX_XMIT_DLENGTH |
2018 ISCSI_HDRDGST_EN |
2019 ISCSI_DATADGST_EN |
2020 ISCSI_INITIAL_R2T_EN |
2021 ISCSI_MAX_R2T |
2022 ISCSI_IMM_DATA_EN |
2023 ISCSI_FIRST_BURST |
2024 ISCSI_MAX_BURST |
2025 ISCSI_PDU_INORDER_EN |
2026 ISCSI_DATASEQ_INORDER_EN |
2027 ISCSI_ERL |
2028 ISCSI_CONN_PORT |
2029 ISCSI_CONN_ADDRESS |
2030 ISCSI_EXP_STATSN |
2031 ISCSI_PERSISTENT_PORT |
2032 ISCSI_PERSISTENT_ADDRESS |
2033 ISCSI_TARGET_NAME | ISCSI_TPGT |
2034 ISCSI_USERNAME | ISCSI_PASSWORD |
2035 ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
2036 ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
2037 ISCSI_LU_RESET_TMO |
2038 ISCSI_PING_TMO | ISCSI_RECV_TMO |
2039 ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
2040 .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_NETDEV_NAME,
2041 .create_session = bnx2i_session_create,
2042 .destroy_session = bnx2i_session_destroy,
2043 .create_conn = bnx2i_conn_create,
2044 .bind_conn = bnx2i_conn_bind,
2045 .destroy_conn = bnx2i_conn_destroy,
2046 .set_param = iscsi_set_param,
2047 .get_conn_param = bnx2i_conn_get_param,
2048 .get_session_param = iscsi_session_get_param,
2049 .get_host_param = bnx2i_host_get_param,
2050 .start_conn = bnx2i_conn_start,
2051 .stop_conn = iscsi_conn_stop,
2052 .send_pdu = iscsi_conn_send_pdu,
2053 .xmit_task = bnx2i_task_xmit,
2054 .get_stats = bnx2i_conn_get_stats,
2055 /* TCP connect - disconnect - option-2 interface calls */
2056 .ep_connect = bnx2i_ep_connect,
2057 .ep_poll = bnx2i_ep_poll,
2058 .ep_disconnect = bnx2i_ep_disconnect,
2059 .set_path = bnx2i_nl_set_path,
2060 /* Error recovery timeout call */
2061 .session_recovery_timedout = iscsi_session_recovery_timedout,
2062 .cleanup_task = bnx2i_cleanup_task,
2063 };
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree