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bnx2i: Updated the connection shutdown/cleanup timeout
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / bnx2i / bnx2i_iscsi.c
blob0a46832f55c2c704d155d5aee08ac540ee03e83f
1 /*
2 * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver.
3 *
4 * Copyright (c) 2006 - 2010 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 * Maintained by: Eddie Wai (eddie.wai@broadcom.com)
14 */
15
16 #include <linux/slab.h>
17 #include <scsi/scsi_tcq.h>
18 #include <scsi/libiscsi.h>
19 #include "bnx2i.h"
20
21 struct scsi_transport_template *bnx2i_scsi_xport_template;
22 struct iscsi_transport bnx2i_iscsi_transport;
23 static struct scsi_host_template bnx2i_host_template;
24
25 /*
26 * Global endpoint resource info
27 */
28 static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */
29
30
31 static int bnx2i_adapter_ready(struct bnx2i_hba *hba)
32 {
33 int retval = 0;
34
35 if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
36 test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
37 test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
38 retval = -EPERM;
39 return retval;
40 }
41
42 /**
43 * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks
44 * @cmd: iscsi cmd struct pointer
45 * @buf_off: absolute buffer offset
46 * @start_bd_off: u32 pointer to return the offset within the BD
47 * indicated by 'start_bd_idx' on which 'buf_off' falls
48 * @start_bd_idx: index of the BD on which 'buf_off' falls
49 *
50 * identifies & marks various bd info for scsi command's imm data,
51 * unsolicited data and the first solicited data seq.
52 */
53 static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off,
54 u32 *start_bd_off, u32 *start_bd_idx)
55 {
56 struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl;
57 u32 cur_offset = 0;
58 u32 cur_bd_idx = 0;
59
60 if (buf_off) {
61 while (buf_off >= (cur_offset + bd_tbl->buffer_length)) {
62 cur_offset += bd_tbl->buffer_length;
63 cur_bd_idx++;
64 bd_tbl++;
65 }
66 }
67
68 *start_bd_off = buf_off - cur_offset;
69 *start_bd_idx = cur_bd_idx;
70 }
71
72 /**
73 * bnx2i_setup_write_cmd_bd_info - sets up BD various information
74 * @task: transport layer's cmd struct pointer
75 *
76 * identifies & marks various bd info for scsi command's immediate data,
77 * unsolicited data and first solicited data seq which includes BD start
78 * index & BD buf off. his function takes into account iscsi parameter such
79 * as immediate data and unsolicited data is support on this connection.
80 */
81 static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task)
82 {
83 struct bnx2i_cmd *cmd = task->dd_data;
84 u32 start_bd_offset;
85 u32 start_bd_idx;
86 u32 buffer_offset = 0;
87 u32 cmd_len = cmd->req.total_data_transfer_length;
88
89 /* if ImmediateData is turned off & IntialR2T is turned on,
90 * there will be no immediate or unsolicited data, just return.
91 */
92 if (!iscsi_task_has_unsol_data(task) && !task->imm_count)
93 return;
94
95 /* Immediate data */
96 buffer_offset += task->imm_count;
97 if (task->imm_count == cmd_len)
98 return;
99
100 if (iscsi_task_has_unsol_data(task)) {
101 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
102 &start_bd_offset, &start_bd_idx);
103 cmd->req.ud_buffer_offset = start_bd_offset;
104 cmd->req.ud_start_bd_index = start_bd_idx;
105 buffer_offset += task->unsol_r2t.data_length;
106 }
107
108 if (buffer_offset != cmd_len) {
109 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
110 &start_bd_offset, &start_bd_idx);
111 if ((start_bd_offset > task->conn->session->first_burst) ||
112 (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) {
113 int i = 0;
114
115 iscsi_conn_printk(KERN_ALERT, task->conn,
116 "bnx2i- error, buf offset 0x%x "
117 "bd_valid %d use_sg %d\n",
118 buffer_offset, cmd->io_tbl.bd_valid,
119 scsi_sg_count(cmd->scsi_cmd));
120 for (i = 0; i < cmd->io_tbl.bd_valid; i++)
121 iscsi_conn_printk(KERN_ALERT, task->conn,
122 "bnx2i err, bd[%d]: len %x\n",
123 i, cmd->io_tbl.bd_tbl[i].\
124 buffer_length);
125 }
126 cmd->req.sd_buffer_offset = start_bd_offset;
127 cmd->req.sd_start_bd_index = start_bd_idx;
128 }
129 }
130
131
132
133 /**
134 * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
135 * @hba: adapter instance
136 * @cmd: iscsi cmd struct pointer
137 *
138 * map SG list
139 */
140 static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
141 {
142 struct scsi_cmnd *sc = cmd->scsi_cmd;
143 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
144 struct scatterlist *sg;
145 int byte_count = 0;
146 int bd_count = 0;
147 int sg_count;
148 int sg_len;
149 u64 addr;
150 int i;
151
152 BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD);
153
154 sg_count = scsi_dma_map(sc);
155
156 scsi_for_each_sg(sc, sg, sg_count, i) {
157 sg_len = sg_dma_len(sg);
158 addr = (u64) sg_dma_address(sg);
159 bd[bd_count].buffer_addr_lo = addr & 0xffffffff;
160 bd[bd_count].buffer_addr_hi = addr >> 32;
161 bd[bd_count].buffer_length = sg_len;
162 bd[bd_count].flags = 0;
163 if (bd_count == 0)
164 bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;
165
166 byte_count += sg_len;
167 bd_count++;
168 }
169
170 if (bd_count)
171 bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
172
173 BUG_ON(byte_count != scsi_bufflen(sc));
174 return bd_count;
175 }
176
177 /**
178 * bnx2i_iscsi_map_sg_list - maps SG list
179 * @cmd: iscsi cmd struct pointer
180 *
181 * creates BD list table for the command
182 */
183 static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)
184 {
185 int bd_count;
186
187 bd_count = bnx2i_map_scsi_sg(cmd->conn->hba, cmd);
188 if (!bd_count) {
189 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
190
191 bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;
192 bd[0].buffer_length = bd[0].flags = 0;
193 }
194 cmd->io_tbl.bd_valid = bd_count;
195 }
196
197
198 /**
199 * bnx2i_iscsi_unmap_sg_list - unmaps SG list
200 * @cmd: iscsi cmd struct pointer
201 *
202 * unmap IO buffers and invalidate the BD table
203 */
204 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)
205 {
206 struct scsi_cmnd *sc = cmd->scsi_cmd;
207
208 if (cmd->io_tbl.bd_valid && sc) {
209 scsi_dma_unmap(sc);
210 cmd->io_tbl.bd_valid = 0;
211 }
212 }
213
214 static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)
215 {
216 memset(&cmd->req, 0x00, sizeof(cmd->req));
217 cmd->req.op_code = 0xFF;
218 cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma;
219 cmd->req.bd_list_addr_hi =
220 (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32);
221
222 }
223
224
225 /**
226 * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'
227 * @hba: pointer to adapter instance
228 * @conn: pointer to iscsi connection
229 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
230 *
231 * update iscsi cid table entry with connection pointer. This enables
232 * driver to quickly get hold of connection structure pointer in
233 * completion/interrupt thread using iscsi context ID
234 */
235 static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,
236 struct bnx2i_conn *bnx2i_conn,
237 u32 iscsi_cid)
238 {
239 if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {
240 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
241 "conn bind - entry #%d not free\n", iscsi_cid);
242 return -EBUSY;
243 }
244
245 hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn;
246 return 0;
247 }
248
249
250 /**
251 * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr
252 * @hba: pointer to adapter instance
253 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
254 */
255 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
256 u16 iscsi_cid)
257 {
258 if (!hba->cid_que.conn_cid_tbl) {
259 printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n");
260 return NULL;
261
262 } else if (iscsi_cid >= hba->max_active_conns) {
263 printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid);
264 return NULL;
265 }
266 return hba->cid_que.conn_cid_tbl[iscsi_cid];
267 }
268
269
270 /**
271 * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
272 * @hba: pointer to adapter instance
273 */
274 static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)
275 {
276 int idx;
277
278 if (!hba->cid_que.cid_free_cnt)
279 return -1;
280
281 idx = hba->cid_que.cid_q_cons_idx;
282 hba->cid_que.cid_q_cons_idx++;
283 if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx)
284 hba->cid_que.cid_q_cons_idx = 0;
285
286 hba->cid_que.cid_free_cnt--;
287 return hba->cid_que.cid_que[idx];
288 }
289
290
291 /**
292 * bnx2i_free_iscsi_cid - returns tcp port to free list
293 * @hba: pointer to adapter instance
294 * @iscsi_cid: iscsi context ID to free
295 */
296 static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)
297 {
298 int idx;
299
300 if (iscsi_cid == (u16) -1)
301 return;
302
303 hba->cid_que.cid_free_cnt++;
304
305 idx = hba->cid_que.cid_q_prod_idx;
306 hba->cid_que.cid_que[idx] = iscsi_cid;
307 hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL;
308 hba->cid_que.cid_q_prod_idx++;
309 if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx)
310 hba->cid_que.cid_q_prod_idx = 0;
311 }
312
313
314 /**
315 * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
316 * @hba: pointer to adapter instance
317 *
318 * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
319 * and initialize table attributes
320 */
321 static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)
322 {
323 int mem_size;
324 int i;
325
326 mem_size = hba->max_active_conns * sizeof(u32);
327 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
328
329 hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL);
330 if (!hba->cid_que.cid_que_base)
331 return -ENOMEM;
332
333 mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *);
334 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
335 hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL);
336 if (!hba->cid_que.conn_cid_tbl) {
337 kfree(hba->cid_que.cid_que_base);
338 hba->cid_que.cid_que_base = NULL;
339 return -ENOMEM;
340 }
341
342 hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base;
343 hba->cid_que.cid_q_prod_idx = 0;
344 hba->cid_que.cid_q_cons_idx = 0;
345 hba->cid_que.cid_q_max_idx = hba->max_active_conns;
346 hba->cid_que.cid_free_cnt = hba->max_active_conns;
347
348 for (i = 0; i < hba->max_active_conns; i++) {
349 hba->cid_que.cid_que[i] = i;
350 hba->cid_que.conn_cid_tbl[i] = NULL;
351 }
352 return 0;
353 }
354
355
356 /**
357 * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
358 * @hba: pointer to adapter instance
359 */
360 static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)
361 {
362 kfree(hba->cid_que.cid_que_base);
363 hba->cid_que.cid_que_base = NULL;
364
365 kfree(hba->cid_que.conn_cid_tbl);
366 hba->cid_que.conn_cid_tbl = NULL;
367 }
368
369
370 /**
371 * bnx2i_alloc_ep - allocates ep structure from global pool
372 * @hba: pointer to adapter instance
373 *
374 * routine allocates a free endpoint structure from global pool and
375 * a tcp port to be used for this connection. Global resource lock,
376 * 'bnx2i_resc_lock' is held while accessing shared global data structures
377 */
378 static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)
379 {
380 struct iscsi_endpoint *ep;
381 struct bnx2i_endpoint *bnx2i_ep;
382
383 ep = iscsi_create_endpoint(sizeof(*bnx2i_ep));
384 if (!ep) {
385 printk(KERN_ERR "bnx2i: Could not allocate ep\n");
386 return NULL;
387 }
388
389 bnx2i_ep = ep->dd_data;
390 bnx2i_ep->cls_ep = ep;
391 INIT_LIST_HEAD(&bnx2i_ep->link);
392 bnx2i_ep->state = EP_STATE_IDLE;
393 bnx2i_ep->ep_iscsi_cid = (u16) -1;
394 bnx2i_ep->hba = hba;
395 bnx2i_ep->hba_age = hba->age;
396 hba->ofld_conns_active++;
397 init_waitqueue_head(&bnx2i_ep->ofld_wait);
398 return ep;
399 }
400
401
402 /**
403 * bnx2i_free_ep - free endpoint
404 * @ep: pointer to iscsi endpoint structure
405 */
406 static void bnx2i_free_ep(struct iscsi_endpoint *ep)
407 {
408 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
409 unsigned long flags;
410
411 spin_lock_irqsave(&bnx2i_resc_lock, flags);
412 bnx2i_ep->state = EP_STATE_IDLE;
413 bnx2i_ep->hba->ofld_conns_active--;
414
415 if (bnx2i_ep->ep_iscsi_cid != (u16) -1)
416 bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);
417
418 if (bnx2i_ep->conn) {
419 bnx2i_ep->conn->ep = NULL;
420 bnx2i_ep->conn = NULL;
421 }
422
423 bnx2i_ep->hba = NULL;
424 spin_unlock_irqrestore(&bnx2i_resc_lock, flags);
425 iscsi_destroy_endpoint(ep);
426 }
427
428
429 /**
430 * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
431 * @hba: adapter instance pointer
432 * @session: iscsi session pointer
433 * @cmd: iscsi command structure
434 */
435 static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,
436 struct bnx2i_cmd *cmd)
437 {
438 struct io_bdt *io = &cmd->io_tbl;
439 struct iscsi_bd *bd;
440
441 io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
442 ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),
443 &io->bd_tbl_dma, GFP_KERNEL);
444 if (!io->bd_tbl) {
445 iscsi_session_printk(KERN_ERR, session, "Could not "
446 "allocate bdt.\n");
447 return -ENOMEM;
448 }
449 io->bd_valid = 0;
450 return 0;
451 }
452
453 /**
454 * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
455 * @hba: adapter instance pointer
456 * @session: iscsi session pointer
457 * @cmd: iscsi command structure
458 */
459 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
460 struct iscsi_session *session)
461 {
462 int i;
463
464 for (i = 0; i < session->cmds_max; i++) {
465 struct iscsi_task *task = session->cmds[i];
466 struct bnx2i_cmd *cmd = task->dd_data;
467
468 if (cmd->io_tbl.bd_tbl)
469 dma_free_coherent(&hba->pcidev->dev,
470 ISCSI_MAX_BDS_PER_CMD *
471 sizeof(struct iscsi_bd),
472 cmd->io_tbl.bd_tbl,
473 cmd->io_tbl.bd_tbl_dma);
474 }
475
476 }
477
478
479 /**
480 * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
481 * @hba: adapter instance pointer
482 * @session: iscsi session pointer
483 */
484 static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
485 struct iscsi_session *session)
486 {
487 int i;
488
489 for (i = 0; i < session->cmds_max; i++) {
490 struct iscsi_task *task = session->cmds[i];
491 struct bnx2i_cmd *cmd = task->dd_data;
492
493 task->hdr = &cmd->hdr;
494 task->hdr_max = sizeof(struct iscsi_hdr);
495
496 if (bnx2i_alloc_bdt(hba, session, cmd))
497 goto free_bdts;
498 }
499
500 return 0;
501
502 free_bdts:
503 bnx2i_destroy_cmd_pool(hba, session);
504 return -ENOMEM;
505 }
506
507
508 /**
509 * bnx2i_setup_mp_bdt - allocate BD table resources
510 * @hba: pointer to adapter structure
511 *
512 * Allocate memory for dummy buffer and associated BD
513 * table to be used by middle path (MP) requests
514 */
515 static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
516 {
517 int rc = 0;
518 struct iscsi_bd *mp_bdt;
519 u64 addr;
520
521 hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
522 &hba->mp_bd_dma, GFP_KERNEL);
523 if (!hba->mp_bd_tbl) {
524 printk(KERN_ERR "unable to allocate Middle Path BDT\n");
525 rc = -1;
526 goto out;
527 }
528
529 hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
530 &hba->dummy_buf_dma, GFP_KERNEL);
531 if (!hba->dummy_buffer) {
532 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
533 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
534 hba->mp_bd_tbl, hba->mp_bd_dma);
535 hba->mp_bd_tbl = NULL;
536 rc = -1;
537 goto out;
538 }
539
540 mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
541 addr = (unsigned long) hba->dummy_buf_dma;
542 mp_bdt->buffer_addr_lo = addr & 0xffffffff;
543 mp_bdt->buffer_addr_hi = addr >> 32;
544 mp_bdt->buffer_length = PAGE_SIZE;
545 mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
546 ISCSI_BD_FIRST_IN_BD_CHAIN;
547 out:
548 return rc;
549 }
550
551
552 /**
553 * bnx2i_free_mp_bdt - releases ITT back to free pool
554 * @hba: pointer to adapter instance
555 *
556 * free MP dummy buffer and associated BD table
557 */
558 static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
559 {
560 if (hba->mp_bd_tbl) {
561 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
562 hba->mp_bd_tbl, hba->mp_bd_dma);
563 hba->mp_bd_tbl = NULL;
564 }
565 if (hba->dummy_buffer) {
566 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
567 hba->dummy_buffer, hba->dummy_buf_dma);
568 hba->dummy_buffer = NULL;
569 }
570 return;
571 }
572
573 /**
574 * bnx2i_drop_session - notifies iscsid of connection error.
575 * @hba: adapter instance pointer
576 * @session: iscsi session pointer
577 *
578 * This notifies iscsid that there is a error, so it can initiate
579 * recovery.
580 *
581 * This relies on caller using the iscsi class iterator so the object
582 * is refcounted and does not disapper from under us.
583 */
584 void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
585 {
586 iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
587 }
588
589 /**
590 * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
591 * @hba: pointer to adapter instance
592 * @ep: pointer to endpoint (transport indentifier) structure
593 *
594 * EP destroy queue manager
595 */
596 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
597 struct bnx2i_endpoint *ep)
598 {
599 write_lock_bh(&hba->ep_rdwr_lock);
600 list_add_tail(&ep->link, &hba->ep_destroy_list);
601 write_unlock_bh(&hba->ep_rdwr_lock);
602 return 0;
603 }
604
605 /**
606 * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
607 *
608 * @hba: pointer to adapter instance
609 * @ep: pointer to endpoint (transport indentifier) structure
610 *
611 * EP destroy queue manager
612 */
613 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
614 struct bnx2i_endpoint *ep)
615 {
616 write_lock_bh(&hba->ep_rdwr_lock);
617 list_del_init(&ep->link);
618 write_unlock_bh(&hba->ep_rdwr_lock);
619
620 return 0;
621 }
622
623 /**
624 * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
625 * @hba: pointer to adapter instance
626 * @ep: pointer to endpoint (transport indentifier) structure
627 *
628 * pending conn offload completion queue manager
629 */
630 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
631 struct bnx2i_endpoint *ep)
632 {
633 write_lock_bh(&hba->ep_rdwr_lock);
634 list_add_tail(&ep->link, &hba->ep_ofld_list);
635 write_unlock_bh(&hba->ep_rdwr_lock);
636 return 0;
637 }
638
639 /**
640 * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
641 * @hba: pointer to adapter instance
642 * @ep: pointer to endpoint (transport indentifier) structure
643 *
644 * pending conn offload completion queue manager
645 */
646 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
647 struct bnx2i_endpoint *ep)
648 {
649 write_lock_bh(&hba->ep_rdwr_lock);
650 list_del_init(&ep->link);
651 write_unlock_bh(&hba->ep_rdwr_lock);
652 return 0;
653 }
654
655
656 /**
657 * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
658 *
659 * @hba: pointer to adapter instance
660 * @iscsi_cid: iscsi context ID to find
661 *
662 */
663 struct bnx2i_endpoint *
664 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
665 {
666 struct list_head *list;
667 struct list_head *tmp;
668 struct bnx2i_endpoint *ep;
669
670 read_lock_bh(&hba->ep_rdwr_lock);
671 list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
672 ep = (struct bnx2i_endpoint *)list;
673
674 if (ep->ep_iscsi_cid == iscsi_cid)
675 break;
676 ep = NULL;
677 }
678 read_unlock_bh(&hba->ep_rdwr_lock);
679
680 if (!ep)
681 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
682 return ep;
683 }
684
685 /**
686 * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
687 * @hba: pointer to adapter instance
688 * @iscsi_cid: iscsi context ID to find
689 *
690 */
691 struct bnx2i_endpoint *
692 bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
693 {
694 struct list_head *list;
695 struct list_head *tmp;
696 struct bnx2i_endpoint *ep;
697
698 read_lock_bh(&hba->ep_rdwr_lock);
699 list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
700 ep = (struct bnx2i_endpoint *)list;
701
702 if (ep->ep_iscsi_cid == iscsi_cid)
703 break;
704 ep = NULL;
705 }
706 read_unlock_bh(&hba->ep_rdwr_lock);
707
708 if (!ep)
709 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
710
711 return ep;
712 }
713
714 /**
715 * bnx2i_ep_active_list_add - add an entry to ep active list
716 * @hba: pointer to adapter instance
717 * @ep: pointer to endpoint (transport indentifier) structure
718 *
719 * current active conn queue manager
720 */
721 static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba,
722 struct bnx2i_endpoint *ep)
723 {
724 write_lock_bh(&hba->ep_rdwr_lock);
725 list_add_tail(&ep->link, &hba->ep_active_list);
726 write_unlock_bh(&hba->ep_rdwr_lock);
727 }
728
729
730 /**
731 * bnx2i_ep_active_list_del - deletes an entry to ep active list
732 * @hba: pointer to adapter instance
733 * @ep: pointer to endpoint (transport indentifier) structure
734 *
735 * current active conn queue manager
736 */
737 static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba,
738 struct bnx2i_endpoint *ep)
739 {
740 write_lock_bh(&hba->ep_rdwr_lock);
741 list_del_init(&ep->link);
742 write_unlock_bh(&hba->ep_rdwr_lock);
743 }
744
745
746 /**
747 * bnx2i_setup_host_queue_size - assigns shost->can_queue param
748 * @hba: pointer to adapter instance
749 * @shost: scsi host pointer
750 *
751 * Initializes 'can_queue' parameter based on how many outstanding commands
752 * the device can handle. Each device 5708/5709/57710 has different
753 * capabilities
754 */
755 static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
756 struct Scsi_Host *shost)
757 {
758 if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
759 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
760 else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
761 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
762 else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
763 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
764 else
765 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
766 }
767
768
769 /**
770 * bnx2i_alloc_hba - allocate and init adapter instance
771 * @cnic: cnic device pointer
772 *
773 * allocate & initialize adapter structure and call other
774 * support routines to do per adapter initialization
775 */
776 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
777 {
778 struct Scsi_Host *shost;
779 struct bnx2i_hba *hba;
780
781 shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
782 if (!shost)
783 return NULL;
784 shost->dma_boundary = cnic->pcidev->dma_mask;
785 shost->transportt = bnx2i_scsi_xport_template;
786 shost->max_id = ISCSI_MAX_CONNS_PER_HBA;
787 shost->max_channel = 0;
788 shost->max_lun = 512;
789 shost->max_cmd_len = 16;
790
791 hba = iscsi_host_priv(shost);
792 hba->shost = shost;
793 hba->netdev = cnic->netdev;
794 /* Get PCI related information and update hba struct members */
795 hba->pcidev = cnic->pcidev;
796 pci_dev_get(hba->pcidev);
797 hba->pci_did = hba->pcidev->device;
798 hba->pci_vid = hba->pcidev->vendor;
799 hba->pci_sdid = hba->pcidev->subsystem_device;
800 hba->pci_svid = hba->pcidev->subsystem_vendor;
801 hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
802 hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
803
804 bnx2i_identify_device(hba);
805 bnx2i_setup_host_queue_size(hba, shost);
806
807 if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
808 hba->regview = ioremap_nocache(hba->netdev->base_addr,
809 BNX2_MQ_CONFIG2);
810 if (!hba->regview)
811 goto ioreg_map_err;
812 } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
813 hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096);
814 if (!hba->regview)
815 goto ioreg_map_err;
816 }
817
818 if (bnx2i_setup_mp_bdt(hba))
819 goto mp_bdt_mem_err;
820
821 INIT_LIST_HEAD(&hba->ep_ofld_list);
822 INIT_LIST_HEAD(&hba->ep_active_list);
823 INIT_LIST_HEAD(&hba->ep_destroy_list);
824 rwlock_init(&hba->ep_rdwr_lock);
825
826 hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
827
828 /* different values for 5708/5709/57710 */
829 hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
830
831 if (bnx2i_setup_free_cid_que(hba))
832 goto cid_que_err;
833
834 /* SQ/RQ/CQ size can be changed via sysfx interface */
835 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
836 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
837 hba->max_sqes = sq_size;
838 else
839 hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
840 } else { /* 5706/5708/5709 */
841 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
842 hba->max_sqes = sq_size;
843 else
844 hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
845 }
846
847 hba->max_rqes = rq_size;
848 hba->max_cqes = hba->max_sqes + rq_size;
849 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
850 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
851 hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
852 } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
853 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
854
855 hba->num_ccell = hba->max_sqes / 2;
856
857 spin_lock_init(&hba->lock);
858 mutex_init(&hba->net_dev_lock);
859 init_waitqueue_head(&hba->eh_wait);
860 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
861 hba->hba_shutdown_tmo = 30 * HZ;
862 hba->conn_teardown_tmo = 20 * HZ;
863 hba->conn_ctx_destroy_tmo = 6 * HZ;
864 } else { /* 5706/5708/5709 */
865 hba->hba_shutdown_tmo = 20 * HZ;
866 hba->conn_teardown_tmo = 10 * HZ;
867 hba->conn_ctx_destroy_tmo = 2 * HZ;
868 }
869
870 if (iscsi_host_add(shost, &hba->pcidev->dev))
871 goto free_dump_mem;
872 return hba;
873
874 free_dump_mem:
875 bnx2i_release_free_cid_que(hba);
876 cid_que_err:
877 bnx2i_free_mp_bdt(hba);
878 mp_bdt_mem_err:
879 if (hba->regview) {
880 iounmap(hba->regview);
881 hba->regview = NULL;
882 }
883 ioreg_map_err:
884 pci_dev_put(hba->pcidev);
885 scsi_host_put(shost);
886 return NULL;
887 }
888
889 /**
890 * bnx2i_free_hba- releases hba structure and resources held by the adapter
891 * @hba: pointer to adapter instance
892 *
893 * free adapter structure and call various cleanup routines.
894 */
895 void bnx2i_free_hba(struct bnx2i_hba *hba)
896 {
897 struct Scsi_Host *shost = hba->shost;
898
899 iscsi_host_remove(shost);
900 INIT_LIST_HEAD(&hba->ep_ofld_list);
901 INIT_LIST_HEAD(&hba->ep_active_list);
902 INIT_LIST_HEAD(&hba->ep_destroy_list);
903 pci_dev_put(hba->pcidev);
904
905 if (hba->regview) {
906 iounmap(hba->regview);
907 hba->regview = NULL;
908 }
909 bnx2i_free_mp_bdt(hba);
910 bnx2i_release_free_cid_que(hba);
911 iscsi_host_free(shost);
912 }
913
914 /**
915 * bnx2i_conn_free_login_resources - free DMA resources used for login process
916 * @hba: pointer to adapter instance
917 * @bnx2i_conn: iscsi connection pointer
918 *
919 * Login related resources, mostly BDT & payload DMA memory is freed
920 */
921 static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
922 struct bnx2i_conn *bnx2i_conn)
923 {
924 if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
925 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
926 bnx2i_conn->gen_pdu.resp_bd_tbl,
927 bnx2i_conn->gen_pdu.resp_bd_dma);
928 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
929 }
930
931 if (bnx2i_conn->gen_pdu.req_bd_tbl) {
932 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
933 bnx2i_conn->gen_pdu.req_bd_tbl,
934 bnx2i_conn->gen_pdu.req_bd_dma);
935 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
936 }
937
938 if (bnx2i_conn->gen_pdu.resp_buf) {
939 dma_free_coherent(&hba->pcidev->dev,
940 ISCSI_DEF_MAX_RECV_SEG_LEN,
941 bnx2i_conn->gen_pdu.resp_buf,
942 bnx2i_conn->gen_pdu.resp_dma_addr);
943 bnx2i_conn->gen_pdu.resp_buf = NULL;
944 }
945
946 if (bnx2i_conn->gen_pdu.req_buf) {
947 dma_free_coherent(&hba->pcidev->dev,
948 ISCSI_DEF_MAX_RECV_SEG_LEN,
949 bnx2i_conn->gen_pdu.req_buf,
950 bnx2i_conn->gen_pdu.req_dma_addr);
951 bnx2i_conn->gen_pdu.req_buf = NULL;
952 }
953 }
954
955 /**
956 * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
957 * @hba: pointer to adapter instance
958 * @bnx2i_conn: iscsi connection pointer
959 *
960 * Mgmt task DNA resources are allocated in this routine.
961 */
962 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
963 struct bnx2i_conn *bnx2i_conn)
964 {
965 /* Allocate memory for login request/response buffers */
966 bnx2i_conn->gen_pdu.req_buf =
967 dma_alloc_coherent(&hba->pcidev->dev,
968 ISCSI_DEF_MAX_RECV_SEG_LEN,
969 &bnx2i_conn->gen_pdu.req_dma_addr,
970 GFP_KERNEL);
971 if (bnx2i_conn->gen_pdu.req_buf == NULL)
972 goto login_req_buf_failure;
973
974 bnx2i_conn->gen_pdu.req_buf_size = 0;
975 bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
976
977 bnx2i_conn->gen_pdu.resp_buf =
978 dma_alloc_coherent(&hba->pcidev->dev,
979 ISCSI_DEF_MAX_RECV_SEG_LEN,
980 &bnx2i_conn->gen_pdu.resp_dma_addr,
981 GFP_KERNEL);
982 if (bnx2i_conn->gen_pdu.resp_buf == NULL)
983 goto login_resp_buf_failure;
984
985 bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
986 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
987
988 bnx2i_conn->gen_pdu.req_bd_tbl =
989 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
990 &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
991 if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
992 goto login_req_bd_tbl_failure;
993
994 bnx2i_conn->gen_pdu.resp_bd_tbl =
995 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
996 &bnx2i_conn->gen_pdu.resp_bd_dma,
997 GFP_KERNEL);
998 if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
999 goto login_resp_bd_tbl_failure;
1000
1001 return 0;
1002
1003 login_resp_bd_tbl_failure:
1004 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
1005 bnx2i_conn->gen_pdu.req_bd_tbl,
1006 bnx2i_conn->gen_pdu.req_bd_dma);
1007 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
1008
1009 login_req_bd_tbl_failure:
1010 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1011 bnx2i_conn->gen_pdu.resp_buf,
1012 bnx2i_conn->gen_pdu.resp_dma_addr);
1013 bnx2i_conn->gen_pdu.resp_buf = NULL;
1014 login_resp_buf_failure:
1015 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1016 bnx2i_conn->gen_pdu.req_buf,
1017 bnx2i_conn->gen_pdu.req_dma_addr);
1018 bnx2i_conn->gen_pdu.req_buf = NULL;
1019 login_req_buf_failure:
1020 iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
1021 "login resource alloc failed!!\n");
1022 return -ENOMEM;
1023
1024 }
1025
1026
1027 /**
1028 * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
1029 * @bnx2i_conn: iscsi connection pointer
1030 *
1031 * Allocates buffers and BD tables before shipping requests to cnic
1032 * for PDUs prepared by 'iscsid' daemon
1033 */
1034 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
1035 {
1036 struct iscsi_bd *bd_tbl;
1037
1038 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
1039
1040 bd_tbl->buffer_addr_hi =
1041 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
1042 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
1043 bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
1044 bnx2i_conn->gen_pdu.req_buf;
1045 bd_tbl->reserved0 = 0;
1046 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1047 ISCSI_BD_FIRST_IN_BD_CHAIN;
1048
1049 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1050 bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1051 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1052 bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1053 bd_tbl->reserved0 = 0;
1054 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1055 ISCSI_BD_FIRST_IN_BD_CHAIN;
1056 }
1057
1058
1059 /**
1060 * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1061 * @task: transport layer task pointer
1062 *
1063 * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1064 * Nop-out and Logout requests flow through this path.
1065 */
1066 static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1067 {
1068 struct bnx2i_cmd *cmd = task->dd_data;
1069 struct bnx2i_conn *bnx2i_conn = cmd->conn;
1070 int rc = 0;
1071 char *buf;
1072 int data_len;
1073
1074 bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1075 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1076 case ISCSI_OP_LOGIN:
1077 bnx2i_send_iscsi_login(bnx2i_conn, task);
1078 break;
1079 case ISCSI_OP_NOOP_OUT:
1080 data_len = bnx2i_conn->gen_pdu.req_buf_size;
1081 buf = bnx2i_conn->gen_pdu.req_buf;
1082 if (data_len)
1083 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1084 buf, data_len, 1);
1085 else
1086 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1087 NULL, 0, 1);
1088 break;
1089 case ISCSI_OP_LOGOUT:
1090 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1091 break;
1092 case ISCSI_OP_SCSI_TMFUNC:
1093 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1094 break;
1095 default:
1096 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1097 "send_gen: unsupported op 0x%x\n",
1098 task->hdr->opcode);
1099 }
1100 return rc;
1101 }
1102
1103
1104 /**********************************************************************
1105 * SCSI-ML Interface
1106 **********************************************************************/
1107
1108 /**
1109 * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1110 * @sc: SCSI-ML command pointer
1111 * @cmd: iscsi cmd pointer
1112 */
1113 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1114 {
1115 u32 dword;
1116 int lpcnt;
1117 u8 *srcp;
1118 u32 *dstp;
1119 u32 scsi_lun[2];
1120
1121 int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1122 cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1123 cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1124
1125 lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1126 srcp = (u8 *) sc->cmnd;
1127 dstp = (u32 *) cmd->req.cdb;
1128 while (lpcnt--) {
1129 memcpy(&dword, (const void *) srcp, 4);
1130 *dstp = cpu_to_be32(dword);
1131 srcp += 4;
1132 dstp++;
1133 }
1134 if (sc->cmd_len & 0x3) {
1135 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1136 *dstp = cpu_to_be32(dword);
1137 }
1138 }
1139
1140 static void bnx2i_cleanup_task(struct iscsi_task *task)
1141 {
1142 struct iscsi_conn *conn = task->conn;
1143 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1144 struct bnx2i_hba *hba = bnx2i_conn->hba;
1145
1146 /*
1147 * mgmt task or cmd was never sent to us to transmit.
1148 */
1149 if (!task->sc || task->state == ISCSI_TASK_PENDING)
1150 return;
1151 /*
1152 * need to clean-up task context to claim dma buffers
1153 */
1154 if (task->state == ISCSI_TASK_ABRT_TMF) {
1155 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1156
1157 spin_unlock_bh(&conn->session->lock);
1158 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1159 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1160 spin_lock_bh(&conn->session->lock);
1161 }
1162 bnx2i_iscsi_unmap_sg_list(task->dd_data);
1163 }
1164
1165 /**
1166 * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1167 * @conn: transport layer conn structure pointer
1168 * @task: transport layer command structure pointer
1169 */
1170 static int
1171 bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1172 {
1173 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1174 struct bnx2i_cmd *cmd = task->dd_data;
1175
1176 memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1177
1178 bnx2i_setup_cmd_wqe_template(cmd);
1179 bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1180 if (task->data_count) {
1181 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1182 task->data_count);
1183 bnx2i_conn->gen_pdu.req_wr_ptr =
1184 bnx2i_conn->gen_pdu.req_buf + task->data_count;
1185 }
1186 cmd->conn = conn->dd_data;
1187 cmd->scsi_cmd = NULL;
1188 return bnx2i_iscsi_send_generic_request(task);
1189 }
1190
1191 /**
1192 * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1193 * @task: transport layer command structure pointer
1194 *
1195 * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1196 */
1197 static int bnx2i_task_xmit(struct iscsi_task *task)
1198 {
1199 struct iscsi_conn *conn = task->conn;
1200 struct iscsi_session *session = conn->session;
1201 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1202 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1203 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1204 struct scsi_cmnd *sc = task->sc;
1205 struct bnx2i_cmd *cmd = task->dd_data;
1206 struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr;
1207
1208 if (bnx2i_conn->ep->num_active_cmds + 1 > hba->max_sqes)
1209 return -ENOMEM;
1210
1211 /*
1212 * If there is no scsi_cmnd this must be a mgmt task
1213 */
1214 if (!sc)
1215 return bnx2i_mtask_xmit(conn, task);
1216
1217 bnx2i_setup_cmd_wqe_template(cmd);
1218 cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1219 cmd->conn = bnx2i_conn;
1220 cmd->scsi_cmd = sc;
1221 cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1222 cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1223
1224 bnx2i_iscsi_map_sg_list(cmd);
1225 bnx2i_cpy_scsi_cdb(sc, cmd);
1226
1227 cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1228 if (sc->sc_data_direction == DMA_TO_DEVICE) {
1229 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1230 cmd->req.itt = task->itt |
1231 (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1232 bnx2i_setup_write_cmd_bd_info(task);
1233 } else {
1234 if (scsi_bufflen(sc))
1235 cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1236 cmd->req.itt = task->itt |
1237 (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1238 }
1239
1240 cmd->req.num_bds = cmd->io_tbl.bd_valid;
1241 if (!cmd->io_tbl.bd_valid) {
1242 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1243 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1244 cmd->req.num_bds = 1;
1245 }
1246
1247 bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1248 return 0;
1249 }
1250
1251 /**
1252 * bnx2i_session_create - create a new iscsi session
1253 * @cmds_max: max commands supported
1254 * @qdepth: scsi queue depth to support
1255 * @initial_cmdsn: initial iscsi CMDSN to be used for this session
1256 *
1257 * Creates a new iSCSI session instance on given device.
1258 */
1259 static struct iscsi_cls_session *
1260 bnx2i_session_create(struct iscsi_endpoint *ep,
1261 uint16_t cmds_max, uint16_t qdepth,
1262 uint32_t initial_cmdsn)
1263 {
1264 struct Scsi_Host *shost;
1265 struct iscsi_cls_session *cls_session;
1266 struct bnx2i_hba *hba;
1267 struct bnx2i_endpoint *bnx2i_ep;
1268
1269 if (!ep) {
1270 printk(KERN_ERR "bnx2i: missing ep.\n");
1271 return NULL;
1272 }
1273
1274 bnx2i_ep = ep->dd_data;
1275 shost = bnx2i_ep->hba->shost;
1276 hba = iscsi_host_priv(shost);
1277 if (bnx2i_adapter_ready(hba))
1278 return NULL;
1279
1280 /*
1281 * user can override hw limit as long as it is within
1282 * the min/max.
1283 */
1284 if (cmds_max > hba->max_sqes)
1285 cmds_max = hba->max_sqes;
1286 else if (cmds_max < BNX2I_SQ_WQES_MIN)
1287 cmds_max = BNX2I_SQ_WQES_MIN;
1288
1289 cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1290 cmds_max, 0, sizeof(struct bnx2i_cmd),
1291 initial_cmdsn, ISCSI_MAX_TARGET);
1292 if (!cls_session)
1293 return NULL;
1294
1295 if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1296 goto session_teardown;
1297 return cls_session;
1298
1299 session_teardown:
1300 iscsi_session_teardown(cls_session);
1301 return NULL;
1302 }
1303
1304
1305 /**
1306 * bnx2i_session_destroy - destroys iscsi session
1307 * @cls_session: pointer to iscsi cls session
1308 *
1309 * Destroys previously created iSCSI session instance and releases
1310 * all resources held by it
1311 */
1312 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1313 {
1314 struct iscsi_session *session = cls_session->dd_data;
1315 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1316 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1317
1318 bnx2i_destroy_cmd_pool(hba, session);
1319 iscsi_session_teardown(cls_session);
1320 }
1321
1322
1323 /**
1324 * bnx2i_conn_create - create iscsi connection instance
1325 * @cls_session: pointer to iscsi cls session
1326 * @cid: iscsi cid as per rfc (not NX2's CID terminology)
1327 *
1328 * Creates a new iSCSI connection instance for a given session
1329 */
1330 static struct iscsi_cls_conn *
1331 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1332 {
1333 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1334 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1335 struct bnx2i_conn *bnx2i_conn;
1336 struct iscsi_cls_conn *cls_conn;
1337 struct iscsi_conn *conn;
1338
1339 cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1340 cid);
1341 if (!cls_conn)
1342 return NULL;
1343 conn = cls_conn->dd_data;
1344
1345 bnx2i_conn = conn->dd_data;
1346 bnx2i_conn->cls_conn = cls_conn;
1347 bnx2i_conn->hba = hba;
1348 /* 'ep' ptr will be assigned in bind() call */
1349 bnx2i_conn->ep = NULL;
1350 init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1351
1352 if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1353 iscsi_conn_printk(KERN_ALERT, conn,
1354 "conn_new: login resc alloc failed!!\n");
1355 goto free_conn;
1356 }
1357
1358 return cls_conn;
1359
1360 free_conn:
1361 iscsi_conn_teardown(cls_conn);
1362 return NULL;
1363 }
1364
1365 /**
1366 * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1367 * @cls_session: pointer to iscsi cls session
1368 * @cls_conn: pointer to iscsi cls conn
1369 * @transport_fd: 64-bit EP handle
1370 * @is_leading: leading connection on this session?
1371 *
1372 * Binds together iSCSI session instance, iSCSI connection instance
1373 * and the TCP connection. This routine returns error code if
1374 * TCP connection does not belong on the device iSCSI sess/conn
1375 * is bound
1376 */
1377 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1378 struct iscsi_cls_conn *cls_conn,
1379 uint64_t transport_fd, int is_leading)
1380 {
1381 struct iscsi_conn *conn = cls_conn->dd_data;
1382 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1383 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1384 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1385 struct bnx2i_endpoint *bnx2i_ep;
1386 struct iscsi_endpoint *ep;
1387 int ret_code;
1388
1389 ep = iscsi_lookup_endpoint(transport_fd);
1390 if (!ep)
1391 return -EINVAL;
1392 /*
1393 * Forcefully terminate all in progress connection recovery at the
1394 * earliest, either in bind(), send_pdu(LOGIN), or conn_start()
1395 */
1396 if (bnx2i_adapter_ready(hba))
1397 return -EIO;
1398
1399 bnx2i_ep = ep->dd_data;
1400 if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1401 (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1402 /* Peer disconnect via' FIN or RST */
1403 return -EINVAL;
1404
1405 if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1406 return -EINVAL;
1407
1408 if (bnx2i_ep->hba != hba) {
1409 /* Error - TCP connection does not belong to this device
1410 */
1411 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1412 "conn bind, ep=0x%p (%s) does not",
1413 bnx2i_ep, bnx2i_ep->hba->netdev->name);
1414 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1415 "belong to hba (%s)\n",
1416 hba->netdev->name);
1417 return -EEXIST;
1418 }
1419 bnx2i_ep->conn = bnx2i_conn;
1420 bnx2i_conn->ep = bnx2i_ep;
1421 bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1422 bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1423
1424 ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1425 bnx2i_ep->ep_iscsi_cid);
1426
1427 /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1428 * driver needs to explicitly replenish RQ index during setup.
1429 */
1430 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1431 bnx2i_put_rq_buf(bnx2i_conn, 0);
1432
1433 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1434 return ret_code;
1435 }
1436
1437
1438 /**
1439 * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1440 * @cls_conn: pointer to iscsi cls conn
1441 *
1442 * Destroy an iSCSI connection instance and release memory resources held by
1443 * this connection
1444 */
1445 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1446 {
1447 struct iscsi_conn *conn = cls_conn->dd_data;
1448 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1449 struct Scsi_Host *shost;
1450 struct bnx2i_hba *hba;
1451
1452 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1453 hba = iscsi_host_priv(shost);
1454
1455 bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1456 iscsi_conn_teardown(cls_conn);
1457 }
1458
1459
1460 /**
1461 * bnx2i_conn_get_param - return iscsi connection parameter to caller
1462 * @cls_conn: pointer to iscsi cls conn
1463 * @param: parameter type identifier
1464 * @buf: buffer pointer
1465 *
1466 * returns iSCSI connection parameters
1467 */
1468 static int bnx2i_conn_get_param(struct iscsi_cls_conn *cls_conn,
1469 enum iscsi_param param, char *buf)
1470 {
1471 struct iscsi_conn *conn = cls_conn->dd_data;
1472 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1473 int len = 0;
1474
1475 if (!(bnx2i_conn && bnx2i_conn->ep && bnx2i_conn->ep->hba))
1476 goto out;
1477
1478 switch (param) {
1479 case ISCSI_PARAM_CONN_PORT:
1480 mutex_lock(&bnx2i_conn->ep->hba->net_dev_lock);
1481 if (bnx2i_conn->ep->cm_sk)
1482 len = sprintf(buf, "%hu\n",
1483 bnx2i_conn->ep->cm_sk->dst_port);
1484 mutex_unlock(&bnx2i_conn->ep->hba->net_dev_lock);
1485 break;
1486 case ISCSI_PARAM_CONN_ADDRESS:
1487 mutex_lock(&bnx2i_conn->ep->hba->net_dev_lock);
1488 if (bnx2i_conn->ep->cm_sk)
1489 len = sprintf(buf, "%pI4\n",
1490 &bnx2i_conn->ep->cm_sk->dst_ip);
1491 mutex_unlock(&bnx2i_conn->ep->hba->net_dev_lock);
1492 break;
1493 default:
1494 return iscsi_conn_get_param(cls_conn, param, buf);
1495 }
1496 out:
1497 return len;
1498 }
1499
1500 /**
1501 * bnx2i_host_get_param - returns host (adapter) related parameters
1502 * @shost: scsi host pointer
1503 * @param: parameter type identifier
1504 * @buf: buffer pointer
1505 */
1506 static int bnx2i_host_get_param(struct Scsi_Host *shost,
1507 enum iscsi_host_param param, char *buf)
1508 {
1509 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1510 int len = 0;
1511
1512 switch (param) {
1513 case ISCSI_HOST_PARAM_HWADDRESS:
1514 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1515 break;
1516 case ISCSI_HOST_PARAM_NETDEV_NAME:
1517 len = sprintf(buf, "%s\n", hba->netdev->name);
1518 break;
1519 case ISCSI_HOST_PARAM_IPADDRESS: {
1520 struct list_head *active_list = &hba->ep_active_list;
1521
1522 read_lock_bh(&hba->ep_rdwr_lock);
1523 if (!list_empty(&hba->ep_active_list)) {
1524 struct bnx2i_endpoint *bnx2i_ep;
1525 struct cnic_sock *csk;
1526
1527 bnx2i_ep = list_first_entry(active_list,
1528 struct bnx2i_endpoint,
1529 link);
1530 csk = bnx2i_ep->cm_sk;
1531 if (test_bit(SK_F_IPV6, &csk->flags))
1532 len = sprintf(buf, "%pI6\n", csk->src_ip);
1533 else
1534 len = sprintf(buf, "%pI4\n", csk->src_ip);
1535 }
1536 read_unlock_bh(&hba->ep_rdwr_lock);
1537 break;
1538 }
1539 default:
1540 return iscsi_host_get_param(shost, param, buf);
1541 }
1542 return len;
1543 }
1544
1545 /**
1546 * bnx2i_conn_start - completes iscsi connection migration to FFP
1547 * @cls_conn: pointer to iscsi cls conn
1548 *
1549 * last call in FFP migration to handover iscsi conn to the driver
1550 */
1551 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1552 {
1553 struct iscsi_conn *conn = cls_conn->dd_data;
1554 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1555
1556 bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1557 bnx2i_update_iscsi_conn(conn);
1558
1559 /*
1560 * this should normally not sleep for a long time so it should
1561 * not disrupt the caller.
1562 */
1563 bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1564 bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1565 bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
1566 add_timer(&bnx2i_conn->ep->ofld_timer);
1567 /* update iSCSI context for this conn, wait for CNIC to complete */
1568 wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1569 bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1570
1571 if (signal_pending(current))
1572 flush_signals(current);
1573 del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1574
1575 iscsi_conn_start(cls_conn);
1576 return 0;
1577 }
1578
1579
1580 /**
1581 * bnx2i_conn_get_stats - returns iSCSI stats
1582 * @cls_conn: pointer to iscsi cls conn
1583 * @stats: pointer to iscsi statistic struct
1584 */
1585 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1586 struct iscsi_stats *stats)
1587 {
1588 struct iscsi_conn *conn = cls_conn->dd_data;
1589
1590 stats->txdata_octets = conn->txdata_octets;
1591 stats->rxdata_octets = conn->rxdata_octets;
1592 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1593 stats->dataout_pdus = conn->dataout_pdus_cnt;
1594 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1595 stats->datain_pdus = conn->datain_pdus_cnt;
1596 stats->r2t_pdus = conn->r2t_pdus_cnt;
1597 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1598 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1599 stats->custom_length = 3;
1600 strcpy(stats->custom[2].desc, "eh_abort_cnt");
1601 stats->custom[2].value = conn->eh_abort_cnt;
1602 stats->digest_err = 0;
1603 stats->timeout_err = 0;
1604 stats->custom_length = 0;
1605 }
1606
1607
1608 /**
1609 * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1610 * @dst_addr: target IP address
1611 *
1612 * check if route resolves to BNX2 device
1613 */
1614 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1615 {
1616 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1617 struct bnx2i_hba *hba;
1618 struct cnic_dev *cnic = NULL;
1619
1620 hba = get_adapter_list_head();
1621 if (hba && hba->cnic)
1622 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1623 if (!cnic) {
1624 printk(KERN_ALERT "bnx2i: no route,"
1625 "can't connect using cnic\n");
1626 goto no_nx2_route;
1627 }
1628 hba = bnx2i_find_hba_for_cnic(cnic);
1629 if (!hba)
1630 goto no_nx2_route;
1631
1632 if (bnx2i_adapter_ready(hba)) {
1633 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1634 goto no_nx2_route;
1635 }
1636 if (hba->netdev->mtu > hba->mtu_supported) {
1637 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1638 hba->netdev->name, hba->netdev->mtu);
1639 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1640 hba->mtu_supported);
1641 goto no_nx2_route;
1642 }
1643 return hba;
1644 no_nx2_route:
1645 return NULL;
1646 }
1647
1648
1649 /**
1650 * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1651 * @hba: pointer to adapter instance
1652 * @ep: endpoint (transport indentifier) structure
1653 *
1654 * destroys cm_sock structure and on chip iscsi context
1655 */
1656 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1657 struct bnx2i_endpoint *ep)
1658 {
1659 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk)
1660 hba->cnic->cm_destroy(ep->cm_sk);
1661
1662 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1663 ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1664 if (ep->conn && ep->conn->cls_conn &&
1665 ep->conn->cls_conn->dd_data) {
1666 struct iscsi_conn *conn = ep->conn->cls_conn->dd_data;
1667
1668 /* Must suspend all rx queue activity for this ep */
1669 set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
1670 }
1671 /* CONN_DISCONNECT timeout may or may not be an issue depending
1672 * on what transcribed in TCP layer, different targets behave
1673 * differently
1674 */
1675 printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, "
1676 "please submit GRC Dump, NW/PCIe trace, "
1677 "driver msgs to developers for analysis\n",
1678 hba->netdev->name);
1679 }
1680
1681 ep->state = EP_STATE_CLEANUP_START;
1682 init_timer(&ep->ofld_timer);
1683 ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies;
1684 ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1685 ep->ofld_timer.data = (unsigned long) ep;
1686 add_timer(&ep->ofld_timer);
1687
1688 bnx2i_ep_destroy_list_add(hba, ep);
1689
1690 /* destroy iSCSI context, wait for it to complete */
1691 if (bnx2i_send_conn_destroy(hba, ep))
1692 ep->state = EP_STATE_CLEANUP_CMPL;
1693
1694 wait_event_interruptible(ep->ofld_wait,
1695 (ep->state != EP_STATE_CLEANUP_START));
1696
1697 if (signal_pending(current))
1698 flush_signals(current);
1699 del_timer_sync(&ep->ofld_timer);
1700
1701 bnx2i_ep_destroy_list_del(hba, ep);
1702
1703 if (ep->state != EP_STATE_CLEANUP_CMPL)
1704 /* should never happen */
1705 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1706
1707 return 0;
1708 }
1709
1710
1711 /**
1712 * bnx2i_ep_connect - establish TCP connection to target portal
1713 * @shost: scsi host
1714 * @dst_addr: target IP address
1715 * @non_blocking: blocking or non-blocking call
1716 *
1717 * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1718 * with l5_core and the CNIC. This is a multi-step process of resolving
1719 * route to target, create a iscsi connection context, handshaking with
1720 * CNIC module to create/initialize the socket struct and finally
1721 * sending down option-2 request to complete TCP 3-way handshake
1722 */
1723 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1724 struct sockaddr *dst_addr,
1725 int non_blocking)
1726 {
1727 u32 iscsi_cid = BNX2I_CID_RESERVED;
1728 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1729 struct sockaddr_in6 *desti6;
1730 struct bnx2i_endpoint *bnx2i_ep;
1731 struct bnx2i_hba *hba;
1732 struct cnic_dev *cnic;
1733 struct cnic_sockaddr saddr;
1734 struct iscsi_endpoint *ep;
1735 int rc = 0;
1736
1737 if (shost) {
1738 /* driver is given scsi host to work with */
1739 hba = iscsi_host_priv(shost);
1740 } else
1741 /*
1742 * check if the given destination can be reached through
1743 * a iscsi capable NetXtreme2 device
1744 */
1745 hba = bnx2i_check_route(dst_addr);
1746
1747 if (!hba) {
1748 rc = -EINVAL;
1749 goto nohba;
1750 }
1751 mutex_lock(&hba->net_dev_lock);
1752
1753 if (bnx2i_adapter_ready(hba) || !hba->cid_que.cid_free_cnt) {
1754 rc = -EPERM;
1755 goto check_busy;
1756 }
1757 cnic = hba->cnic;
1758 ep = bnx2i_alloc_ep(hba);
1759 if (!ep) {
1760 rc = -ENOMEM;
1761 goto check_busy;
1762 }
1763 bnx2i_ep = ep->dd_data;
1764
1765 bnx2i_ep->num_active_cmds = 0;
1766 iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1767 if (iscsi_cid == -1) {
1768 printk(KERN_ALERT "bnx2i (%s): alloc_ep - unable to allocate "
1769 "iscsi cid\n", hba->netdev->name);
1770 rc = -ENOMEM;
1771 bnx2i_free_ep(ep);
1772 goto check_busy;
1773 }
1774 bnx2i_ep->hba_age = hba->age;
1775
1776 rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1777 if (rc != 0) {
1778 printk(KERN_ALERT "bnx2i (%s): ep_conn - alloc QP resc error"
1779 "\n", hba->netdev->name);
1780 rc = -ENOMEM;
1781 goto qp_resc_err;
1782 }
1783
1784 bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1785 bnx2i_ep->state = EP_STATE_OFLD_START;
1786 bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1787
1788 init_timer(&bnx2i_ep->ofld_timer);
1789 bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1790 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1791 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1792 add_timer(&bnx2i_ep->ofld_timer);
1793
1794 if (bnx2i_send_conn_ofld_req(hba, bnx2i_ep)) {
1795 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1796 printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1797 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1798 rc = -EBUSY;
1799 } else
1800 rc = -ENOSPC;
1801 printk(KERN_ALERT "bnx2i (%s): unable to send conn offld kwqe"
1802 "\n", hba->netdev->name);
1803 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1804 goto conn_failed;
1805 }
1806
1807 /* Wait for CNIC hardware to setup conn context and return 'cid' */
1808 wait_event_interruptible(bnx2i_ep->ofld_wait,
1809 bnx2i_ep->state != EP_STATE_OFLD_START);
1810
1811 if (signal_pending(current))
1812 flush_signals(current);
1813 del_timer_sync(&bnx2i_ep->ofld_timer);
1814
1815 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1816
1817 if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1818 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1819 printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1820 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1821 rc = -EBUSY;
1822 } else
1823 rc = -ENOSPC;
1824 goto conn_failed;
1825 }
1826
1827 rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1828 iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1829 if (rc) {
1830 rc = -EINVAL;
1831 /* Need to terminate and cleanup the connection */
1832 goto release_ep;
1833 }
1834
1835 bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1836 bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1837 clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1838
1839 memset(&saddr, 0, sizeof(saddr));
1840 if (dst_addr->sa_family == AF_INET) {
1841 desti = (struct sockaddr_in *) dst_addr;
1842 saddr.remote.v4 = *desti;
1843 saddr.local.v4.sin_family = desti->sin_family;
1844 } else if (dst_addr->sa_family == AF_INET6) {
1845 desti6 = (struct sockaddr_in6 *) dst_addr;
1846 saddr.remote.v6 = *desti6;
1847 saddr.local.v6.sin6_family = desti6->sin6_family;
1848 }
1849
1850 bnx2i_ep->timestamp = jiffies;
1851 bnx2i_ep->state = EP_STATE_CONNECT_START;
1852 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1853 rc = -EINVAL;
1854 goto conn_failed;
1855 } else
1856 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1857 if (rc)
1858 goto release_ep;
1859
1860 bnx2i_ep_active_list_add(hba, bnx2i_ep);
1861
1862 if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
1863 goto del_active_ep;
1864
1865 mutex_unlock(&hba->net_dev_lock);
1866 return ep;
1867
1868 del_active_ep:
1869 bnx2i_ep_active_list_del(hba, bnx2i_ep);
1870 release_ep:
1871 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1872 mutex_unlock(&hba->net_dev_lock);
1873 return ERR_PTR(rc);
1874 }
1875 conn_failed:
1876 bnx2i_free_qp_resc(hba, bnx2i_ep);
1877 qp_resc_err:
1878 bnx2i_free_ep(ep);
1879 check_busy:
1880 mutex_unlock(&hba->net_dev_lock);
1881 nohba:
1882 return ERR_PTR(rc);
1883 }
1884
1885
1886 /**
1887 * bnx2i_ep_poll - polls for TCP connection establishement
1888 * @ep: TCP connection (endpoint) handle
1889 * @timeout_ms: timeout value in milli secs
1890 *
1891 * polls for TCP connect request to complete
1892 */
1893 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1894 {
1895 struct bnx2i_endpoint *bnx2i_ep;
1896 int rc = 0;
1897
1898 bnx2i_ep = ep->dd_data;
1899 if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1900 (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1901 (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1902 return -1;
1903 if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1904 return 1;
1905
1906 rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1907 ((bnx2i_ep->state ==
1908 EP_STATE_OFLD_FAILED) ||
1909 (bnx2i_ep->state ==
1910 EP_STATE_CONNECT_FAILED) ||
1911 (bnx2i_ep->state ==
1912 EP_STATE_CONNECT_COMPL)),
1913 msecs_to_jiffies(timeout_ms));
1914 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED)
1915 rc = -1;
1916
1917 if (rc > 0)
1918 return 1;
1919 else if (!rc)
1920 return 0; /* timeout */
1921 else
1922 return rc;
1923 }
1924
1925
1926 /**
1927 * bnx2i_ep_tcp_conn_active - check EP state transition
1928 * @ep: endpoint pointer
1929 *
1930 * check if underlying TCP connection is active
1931 */
1932 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1933 {
1934 int ret;
1935 int cnic_dev_10g = 0;
1936
1937 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1938 cnic_dev_10g = 1;
1939
1940 switch (bnx2i_ep->state) {
1941 case EP_STATE_CONNECT_FAILED:
1942 case EP_STATE_CLEANUP_FAILED:
1943 case EP_STATE_OFLD_FAILED:
1944 case EP_STATE_DISCONN_TIMEDOUT:
1945 ret = 0;
1946 break;
1947 case EP_STATE_CONNECT_START:
1948 case EP_STATE_CONNECT_COMPL:
1949 case EP_STATE_ULP_UPDATE_START:
1950 case EP_STATE_ULP_UPDATE_COMPL:
1951 case EP_STATE_TCP_FIN_RCVD:
1952 case EP_STATE_LOGOUT_SENT:
1953 case EP_STATE_LOGOUT_RESP_RCVD:
1954 case EP_STATE_ULP_UPDATE_FAILED:
1955 ret = 1;
1956 break;
1957 case EP_STATE_TCP_RST_RCVD:
1958 if (cnic_dev_10g)
1959 ret = 0;
1960 else
1961 ret = 1;
1962 break;
1963 default:
1964 ret = 0;
1965 }
1966
1967 return ret;
1968 }
1969
1970
1971 /*
1972 * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw
1973 * @ep: TCP connection (bnx2i endpoint) handle
1974 *
1975 * executes TCP connection teardown process
1976 */
1977 int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep)
1978 {
1979 struct bnx2i_hba *hba = bnx2i_ep->hba;
1980 struct cnic_dev *cnic;
1981 struct iscsi_session *session = NULL;
1982 struct iscsi_conn *conn = NULL;
1983 int ret = 0;
1984 int close = 0;
1985 int close_ret = 0;
1986
1987 if (!hba)
1988 return 0;
1989
1990 cnic = hba->cnic;
1991 if (!cnic)
1992 return 0;
1993
1994 if (bnx2i_ep->state == EP_STATE_IDLE ||
1995 bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
1996 return 0;
1997
1998 if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
1999 goto destroy_conn;
2000
2001 if (bnx2i_ep->conn) {
2002 conn = bnx2i_ep->conn->cls_conn->dd_data;
2003 session = conn->session;
2004 }
2005
2006 init_timer(&bnx2i_ep->ofld_timer);
2007 bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies;
2008 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
2009 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
2010 add_timer(&bnx2i_ep->ofld_timer);
2011
2012 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
2013 goto out;
2014
2015 if (session) {
2016 spin_lock_bh(&session->lock);
2017 if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) {
2018 if (session->state == ISCSI_STATE_LOGGING_OUT) {
2019 if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) {
2020 /* Logout sent, but no resp */
2021 printk(KERN_ALERT "bnx2i (%s): WARNING"
2022 " logout response was not "
2023 "received!\n",
2024 bnx2i_ep->hba->netdev->name);
2025 } else if (bnx2i_ep->state ==
2026 EP_STATE_LOGOUT_RESP_RCVD)
2027 close = 1;
2028 }
2029 } else
2030 close = 1;
2031
2032 spin_unlock_bh(&session->lock);
2033 }
2034
2035 bnx2i_ep->state = EP_STATE_DISCONN_START;
2036
2037 if (close)
2038 close_ret = cnic->cm_close(bnx2i_ep->cm_sk);
2039 else
2040 close_ret = cnic->cm_abort(bnx2i_ep->cm_sk);
2041
2042 if (close_ret)
2043 printk(KERN_ALERT "bnx2i (%s): close/abort(%d) returned %d\n",
2044 bnx2i_ep->hba->netdev->name, close, close_ret);
2045 else
2046 /* wait for option-2 conn teardown */
2047 wait_event_interruptible(bnx2i_ep->ofld_wait,
2048 bnx2i_ep->state != EP_STATE_DISCONN_START);
2049
2050 if (signal_pending(current))
2051 flush_signals(current);
2052 del_timer_sync(&bnx2i_ep->ofld_timer);
2053
2054 destroy_conn:
2055 bnx2i_ep_active_list_del(hba, bnx2i_ep);
2056 if (bnx2i_tear_down_conn(hba, bnx2i_ep))
2057 return -EINVAL;
2058 out:
2059 bnx2i_ep->state = EP_STATE_IDLE;
2060 return ret;
2061 }
2062
2063
2064 /**
2065 * bnx2i_ep_disconnect - executes TCP connection teardown process
2066 * @ep: TCP connection (iscsi endpoint) handle
2067 *
2068 * executes TCP connection teardown process
2069 */
2070 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
2071 {
2072 struct bnx2i_endpoint *bnx2i_ep;
2073 struct bnx2i_conn *bnx2i_conn = NULL;
2074 struct iscsi_conn *conn = NULL;
2075 struct bnx2i_hba *hba;
2076
2077 bnx2i_ep = ep->dd_data;
2078
2079 /* driver should not attempt connection cleanup until TCP_CONNECT
2080 * completes either successfully or fails. Timeout is 9-secs, so
2081 * wait for it to complete
2082 */
2083 while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
2084 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
2085 msleep(250);
2086
2087 if (bnx2i_ep->conn) {
2088 bnx2i_conn = bnx2i_ep->conn;
2089 conn = bnx2i_conn->cls_conn->dd_data;
2090 iscsi_suspend_queue(conn);
2091 }
2092 hba = bnx2i_ep->hba;
2093
2094 mutex_lock(&hba->net_dev_lock);
2095
2096 if (bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2097 goto out;
2098
2099 if (bnx2i_ep->state == EP_STATE_IDLE)
2100 goto free_resc;
2101
2102 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
2103 (bnx2i_ep->hba_age != hba->age)) {
2104 bnx2i_ep_active_list_del(hba, bnx2i_ep);
2105 goto free_resc;
2106 }
2107
2108 /* Do all chip cleanup here */
2109 if (bnx2i_hw_ep_disconnect(bnx2i_ep)) {
2110 mutex_unlock(&hba->net_dev_lock);
2111 return;
2112 }
2113 free_resc:
2114 bnx2i_free_qp_resc(hba, bnx2i_ep);
2115
2116 if (bnx2i_conn)
2117 bnx2i_conn->ep = NULL;
2118
2119 bnx2i_free_ep(ep);
2120 out:
2121 mutex_unlock(&hba->net_dev_lock);
2122
2123 wake_up_interruptible(&hba->eh_wait);
2124 }
2125
2126
2127 /**
2128 * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
2129 * @buf: pointer to buffer containing iscsi path message
2130 *
2131 */
2132 static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
2133 {
2134 struct bnx2i_hba *hba = iscsi_host_priv(shost);
2135 char *buf = (char *) params;
2136 u16 len = sizeof(*params);
2137
2138 /* handled by cnic driver */
2139 hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
2140 len);
2141
2142 return 0;
2143 }
2144
2145
2146 /*
2147 * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
2148 * used while registering with the scsi host and iSCSI transport module.
2149 */
2150 static struct scsi_host_template bnx2i_host_template = {
2151 .module = THIS_MODULE,
2152 .name = "Broadcom Offload iSCSI Initiator",
2153 .proc_name = "bnx2i",
2154 .queuecommand = iscsi_queuecommand,
2155 .eh_abort_handler = iscsi_eh_abort,
2156 .eh_device_reset_handler = iscsi_eh_device_reset,
2157 .eh_target_reset_handler = iscsi_eh_recover_target,
2158 .change_queue_depth = iscsi_change_queue_depth,
2159 .can_queue = 1024,
2160 .max_sectors = 127,
2161 .cmd_per_lun = 32,
2162 .this_id = -1,
2163 .use_clustering = ENABLE_CLUSTERING,
2164 .sg_tablesize = ISCSI_MAX_BDS_PER_CMD,
2165 .shost_attrs = bnx2i_dev_attributes,
2166 };
2167
2168 struct iscsi_transport bnx2i_iscsi_transport = {
2169 .owner = THIS_MODULE,
2170 .name = "bnx2i",
2171 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST |
2172 CAP_MULTI_R2T | CAP_DATADGST |
2173 CAP_DATA_PATH_OFFLOAD,
2174 .param_mask = ISCSI_MAX_RECV_DLENGTH |
2175 ISCSI_MAX_XMIT_DLENGTH |
2176 ISCSI_HDRDGST_EN |
2177 ISCSI_DATADGST_EN |
2178 ISCSI_INITIAL_R2T_EN |
2179 ISCSI_MAX_R2T |
2180 ISCSI_IMM_DATA_EN |
2181 ISCSI_FIRST_BURST |
2182 ISCSI_MAX_BURST |
2183 ISCSI_PDU_INORDER_EN |
2184 ISCSI_DATASEQ_INORDER_EN |
2185 ISCSI_ERL |
2186 ISCSI_CONN_PORT |
2187 ISCSI_CONN_ADDRESS |
2188 ISCSI_EXP_STATSN |
2189 ISCSI_PERSISTENT_PORT |
2190 ISCSI_PERSISTENT_ADDRESS |
2191 ISCSI_TARGET_NAME | ISCSI_TPGT |
2192 ISCSI_USERNAME | ISCSI_PASSWORD |
2193 ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
2194 ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
2195 ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO |
2196 ISCSI_PING_TMO | ISCSI_RECV_TMO |
2197 ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
2198 .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
2199 ISCSI_HOST_NETDEV_NAME,
2200 .create_session = bnx2i_session_create,
2201 .destroy_session = bnx2i_session_destroy,
2202 .create_conn = bnx2i_conn_create,
2203 .bind_conn = bnx2i_conn_bind,
2204 .destroy_conn = bnx2i_conn_destroy,
2205 .set_param = iscsi_set_param,
2206 .get_conn_param = bnx2i_conn_get_param,
2207 .get_session_param = iscsi_session_get_param,
2208 .get_host_param = bnx2i_host_get_param,
2209 .start_conn = bnx2i_conn_start,
2210 .stop_conn = iscsi_conn_stop,
2211 .send_pdu = iscsi_conn_send_pdu,
2212 .xmit_task = bnx2i_task_xmit,
2213 .get_stats = bnx2i_conn_get_stats,
2214 /* TCP connect - disconnect - option-2 interface calls */
2215 .ep_connect = bnx2i_ep_connect,
2216 .ep_poll = bnx2i_ep_poll,
2217 .ep_disconnect = bnx2i_ep_disconnect,
2218 .set_path = bnx2i_nl_set_path,
2219 /* Error recovery timeout call */
2220 .session_recovery_timedout = iscsi_session_recovery_timedout,
2221 .cleanup_task = bnx2i_cleanup_task,
2222 };
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree