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RT-AC56 3.0.0.4.374.37 core
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / scsi / bnx2i / bnx2i_iscsi.c
bloba46ccc380ab197c1d90cf059b42839c462e52f5a
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 <linux/slab.h>
16 #include <scsi/scsi_tcq.h>
17 #include <scsi/libiscsi.h>
18 #include "bnx2i.h"
19
20 struct scsi_transport_template *bnx2i_scsi_xport_template;
21 struct iscsi_transport bnx2i_iscsi_transport;
22 static struct scsi_host_template bnx2i_host_template;
23
24 /*
25 * Global endpoint resource info
26 */
27 static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */
28
29
30 static int bnx2i_adapter_ready(struct bnx2i_hba *hba)
31 {
32 int retval = 0;
33
34 if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
35 test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
36 test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
37 retval = -EPERM;
38 return retval;
39 }
40
41 /**
42 * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks
43 * @cmd: iscsi cmd struct pointer
44 * @buf_off: absolute buffer offset
45 * @start_bd_off: u32 pointer to return the offset within the BD
46 * indicated by 'start_bd_idx' on which 'buf_off' falls
47 * @start_bd_idx: index of the BD on which 'buf_off' falls
48 *
49 * identifies & marks various bd info for scsi command's imm data,
50 * unsolicited data and the first solicited data seq.
51 */
52 static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off,
53 u32 *start_bd_off, u32 *start_bd_idx)
54 {
55 struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl;
56 u32 cur_offset = 0;
57 u32 cur_bd_idx = 0;
58
59 if (buf_off) {
60 while (buf_off >= (cur_offset + bd_tbl->buffer_length)) {
61 cur_offset += bd_tbl->buffer_length;
62 cur_bd_idx++;
63 bd_tbl++;
64 }
65 }
66
67 *start_bd_off = buf_off - cur_offset;
68 *start_bd_idx = cur_bd_idx;
69 }
70
71 /**
72 * bnx2i_setup_write_cmd_bd_info - sets up BD various information
73 * @task: transport layer's cmd struct pointer
74 *
75 * identifies & marks various bd info for scsi command's immediate data,
76 * unsolicited data and first solicited data seq which includes BD start
77 * index & BD buf off. his function takes into account iscsi parameter such
78 * as immediate data and unsolicited data is support on this connection.
79 */
80 static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task)
81 {
82 struct bnx2i_cmd *cmd = task->dd_data;
83 u32 start_bd_offset;
84 u32 start_bd_idx;
85 u32 buffer_offset = 0;
86 u32 cmd_len = cmd->req.total_data_transfer_length;
87
88 /* if ImmediateData is turned off & IntialR2T is turned on,
89 * there will be no immediate or unsolicited data, just return.
90 */
91 if (!iscsi_task_has_unsol_data(task) && !task->imm_count)
92 return;
93
94 /* Immediate data */
95 buffer_offset += task->imm_count;
96 if (task->imm_count == cmd_len)
97 return;
98
99 if (iscsi_task_has_unsol_data(task)) {
100 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
101 &start_bd_offset, &start_bd_idx);
102 cmd->req.ud_buffer_offset = start_bd_offset;
103 cmd->req.ud_start_bd_index = start_bd_idx;
104 buffer_offset += task->unsol_r2t.data_length;
105 }
106
107 if (buffer_offset != cmd_len) {
108 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
109 &start_bd_offset, &start_bd_idx);
110 if ((start_bd_offset > task->conn->session->first_burst) ||
111 (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) {
112 int i = 0;
113
114 iscsi_conn_printk(KERN_ALERT, task->conn,
115 "bnx2i- error, buf offset 0x%x "
116 "bd_valid %d use_sg %d\n",
117 buffer_offset, cmd->io_tbl.bd_valid,
118 scsi_sg_count(cmd->scsi_cmd));
119 for (i = 0; i < cmd->io_tbl.bd_valid; i++)
120 iscsi_conn_printk(KERN_ALERT, task->conn,
121 "bnx2i err, bd[%d]: len %x\n",
122 i, cmd->io_tbl.bd_tbl[i].\
123 buffer_length);
124 }
125 cmd->req.sd_buffer_offset = start_bd_offset;
126 cmd->req.sd_start_bd_index = start_bd_idx;
127 }
128 }
129
130
131
132 /**
133 * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
134 * @hba: adapter instance
135 * @cmd: iscsi cmd struct pointer
136 *
137 * map SG list
138 */
139 static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
140 {
141 struct scsi_cmnd *sc = cmd->scsi_cmd;
142 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
143 struct scatterlist *sg;
144 int byte_count = 0;
145 int bd_count = 0;
146 int sg_count;
147 int sg_len;
148 u64 addr;
149 int i;
150
151 BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD);
152
153 sg_count = scsi_dma_map(sc);
154
155 scsi_for_each_sg(sc, sg, sg_count, i) {
156 sg_len = sg_dma_len(sg);
157 addr = (u64) sg_dma_address(sg);
158 bd[bd_count].buffer_addr_lo = addr & 0xffffffff;
159 bd[bd_count].buffer_addr_hi = addr >> 32;
160 bd[bd_count].buffer_length = sg_len;
161 bd[bd_count].flags = 0;
162 if (bd_count == 0)
163 bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;
164
165 byte_count += sg_len;
166 bd_count++;
167 }
168
169 if (bd_count)
170 bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
171
172 BUG_ON(byte_count != scsi_bufflen(sc));
173 return bd_count;
174 }
175
176 /**
177 * bnx2i_iscsi_map_sg_list - maps SG list
178 * @cmd: iscsi cmd struct pointer
179 *
180 * creates BD list table for the command
181 */
182 static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)
183 {
184 int bd_count;
185
186 bd_count = bnx2i_map_scsi_sg(cmd->conn->hba, cmd);
187 if (!bd_count) {
188 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
189
190 bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;
191 bd[0].buffer_length = bd[0].flags = 0;
192 }
193 cmd->io_tbl.bd_valid = bd_count;
194 }
195
196
197 /**
198 * bnx2i_iscsi_unmap_sg_list - unmaps SG list
199 * @cmd: iscsi cmd struct pointer
200 *
201 * unmap IO buffers and invalidate the BD table
202 */
203 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)
204 {
205 struct scsi_cmnd *sc = cmd->scsi_cmd;
206
207 if (cmd->io_tbl.bd_valid && sc) {
208 scsi_dma_unmap(sc);
209 cmd->io_tbl.bd_valid = 0;
210 }
211 }
212
213 static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)
214 {
215 memset(&cmd->req, 0x00, sizeof(cmd->req));
216 cmd->req.op_code = 0xFF;
217 cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma;
218 cmd->req.bd_list_addr_hi =
219 (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32);
220
221 }
222
223
224 /**
225 * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'
226 * @hba: pointer to adapter instance
227 * @conn: pointer to iscsi connection
228 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
229 *
230 * update iscsi cid table entry with connection pointer. This enables
231 * driver to quickly get hold of connection structure pointer in
232 * completion/interrupt thread using iscsi context ID
233 */
234 static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,
235 struct bnx2i_conn *bnx2i_conn,
236 u32 iscsi_cid)
237 {
238 if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {
239 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
240 "conn bind - entry #%d not free\n", iscsi_cid);
241 return -EBUSY;
242 }
243
244 hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn;
245 return 0;
246 }
247
248
249 /**
250 * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr
251 * @hba: pointer to adapter instance
252 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
253 */
254 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
255 u16 iscsi_cid)
256 {
257 if (!hba->cid_que.conn_cid_tbl) {
258 printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n");
259 return NULL;
260
261 } else if (iscsi_cid >= hba->max_active_conns) {
262 printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid);
263 return NULL;
264 }
265 return hba->cid_que.conn_cid_tbl[iscsi_cid];
266 }
267
268
269 /**
270 * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
271 * @hba: pointer to adapter instance
272 */
273 static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)
274 {
275 int idx;
276
277 if (!hba->cid_que.cid_free_cnt)
278 return -1;
279
280 idx = hba->cid_que.cid_q_cons_idx;
281 hba->cid_que.cid_q_cons_idx++;
282 if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx)
283 hba->cid_que.cid_q_cons_idx = 0;
284
285 hba->cid_que.cid_free_cnt--;
286 return hba->cid_que.cid_que[idx];
287 }
288
289
290 /**
291 * bnx2i_free_iscsi_cid - returns tcp port to free list
292 * @hba: pointer to adapter instance
293 * @iscsi_cid: iscsi context ID to free
294 */
295 static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)
296 {
297 int idx;
298
299 if (iscsi_cid == (u16) -1)
300 return;
301
302 hba->cid_que.cid_free_cnt++;
303
304 idx = hba->cid_que.cid_q_prod_idx;
305 hba->cid_que.cid_que[idx] = iscsi_cid;
306 hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL;
307 hba->cid_que.cid_q_prod_idx++;
308 if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx)
309 hba->cid_que.cid_q_prod_idx = 0;
310 }
311
312
313 /**
314 * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
315 * @hba: pointer to adapter instance
316 *
317 * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
318 * and initialize table attributes
319 */
320 static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)
321 {
322 int mem_size;
323 int i;
324
325 mem_size = hba->max_active_conns * sizeof(u32);
326 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
327
328 hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL);
329 if (!hba->cid_que.cid_que_base)
330 return -ENOMEM;
331
332 mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *);
333 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
334 hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL);
335 if (!hba->cid_que.conn_cid_tbl) {
336 kfree(hba->cid_que.cid_que_base);
337 hba->cid_que.cid_que_base = NULL;
338 return -ENOMEM;
339 }
340
341 hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base;
342 hba->cid_que.cid_q_prod_idx = 0;
343 hba->cid_que.cid_q_cons_idx = 0;
344 hba->cid_que.cid_q_max_idx = hba->max_active_conns;
345 hba->cid_que.cid_free_cnt = hba->max_active_conns;
346
347 for (i = 0; i < hba->max_active_conns; i++) {
348 hba->cid_que.cid_que[i] = i;
349 hba->cid_que.conn_cid_tbl[i] = NULL;
350 }
351 return 0;
352 }
353
354
355 /**
356 * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
357 * @hba: pointer to adapter instance
358 */
359 static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)
360 {
361 kfree(hba->cid_que.cid_que_base);
362 hba->cid_que.cid_que_base = NULL;
363
364 kfree(hba->cid_que.conn_cid_tbl);
365 hba->cid_que.conn_cid_tbl = NULL;
366 }
367
368
369 /**
370 * bnx2i_alloc_ep - allocates ep structure from global pool
371 * @hba: pointer to adapter instance
372 *
373 * routine allocates a free endpoint structure from global pool and
374 * a tcp port to be used for this connection. Global resource lock,
375 * 'bnx2i_resc_lock' is held while accessing shared global data structures
376 */
377 static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)
378 {
379 struct iscsi_endpoint *ep;
380 struct bnx2i_endpoint *bnx2i_ep;
381
382 ep = iscsi_create_endpoint(sizeof(*bnx2i_ep));
383 if (!ep) {
384 printk(KERN_ERR "bnx2i: Could not allocate ep\n");
385 return NULL;
386 }
387
388 bnx2i_ep = ep->dd_data;
389 bnx2i_ep->cls_ep = ep;
390 INIT_LIST_HEAD(&bnx2i_ep->link);
391 bnx2i_ep->state = EP_STATE_IDLE;
392 bnx2i_ep->ep_iscsi_cid = (u16) -1;
393 bnx2i_ep->hba = hba;
394 bnx2i_ep->hba_age = hba->age;
395 hba->ofld_conns_active++;
396 init_waitqueue_head(&bnx2i_ep->ofld_wait);
397 return ep;
398 }
399
400
401 /**
402 * bnx2i_free_ep - free endpoint
403 * @ep: pointer to iscsi endpoint structure
404 */
405 static void bnx2i_free_ep(struct iscsi_endpoint *ep)
406 {
407 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
408 unsigned long flags;
409
410 spin_lock_irqsave(&bnx2i_resc_lock, flags);
411 bnx2i_ep->state = EP_STATE_IDLE;
412 bnx2i_ep->hba->ofld_conns_active--;
413
414 bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);
415 if (bnx2i_ep->conn) {
416 bnx2i_ep->conn->ep = NULL;
417 bnx2i_ep->conn = NULL;
418 }
419
420 bnx2i_ep->hba = NULL;
421 spin_unlock_irqrestore(&bnx2i_resc_lock, flags);
422 iscsi_destroy_endpoint(ep);
423 }
424
425
426 /**
427 * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
428 * @hba: adapter instance pointer
429 * @session: iscsi session pointer
430 * @cmd: iscsi command structure
431 */
432 static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,
433 struct bnx2i_cmd *cmd)
434 {
435 struct io_bdt *io = &cmd->io_tbl;
436 struct iscsi_bd *bd;
437
438 io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
439 ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),
440 &io->bd_tbl_dma, GFP_KERNEL);
441 if (!io->bd_tbl) {
442 iscsi_session_printk(KERN_ERR, session, "Could not "
443 "allocate bdt.\n");
444 return -ENOMEM;
445 }
446 io->bd_valid = 0;
447 return 0;
448 }
449
450 /**
451 * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
452 * @hba: adapter instance pointer
453 * @session: iscsi session pointer
454 * @cmd: iscsi command structure
455 */
456 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
457 struct iscsi_session *session)
458 {
459 int i;
460
461 for (i = 0; i < session->cmds_max; i++) {
462 struct iscsi_task *task = session->cmds[i];
463 struct bnx2i_cmd *cmd = task->dd_data;
464
465 if (cmd->io_tbl.bd_tbl)
466 dma_free_coherent(&hba->pcidev->dev,
467 ISCSI_MAX_BDS_PER_CMD *
468 sizeof(struct iscsi_bd),
469 cmd->io_tbl.bd_tbl,
470 cmd->io_tbl.bd_tbl_dma);
471 }
472
473 }
474
475
476 /**
477 * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
478 * @hba: adapter instance pointer
479 * @session: iscsi session pointer
480 */
481 static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
482 struct iscsi_session *session)
483 {
484 int i;
485
486 for (i = 0; i < session->cmds_max; i++) {
487 struct iscsi_task *task = session->cmds[i];
488 struct bnx2i_cmd *cmd = task->dd_data;
489
490 task->hdr = &cmd->hdr;
491 task->hdr_max = sizeof(struct iscsi_hdr);
492
493 if (bnx2i_alloc_bdt(hba, session, cmd))
494 goto free_bdts;
495 }
496
497 return 0;
498
499 free_bdts:
500 bnx2i_destroy_cmd_pool(hba, session);
501 return -ENOMEM;
502 }
503
504
505 /**
506 * bnx2i_setup_mp_bdt - allocate BD table resources
507 * @hba: pointer to adapter structure
508 *
509 * Allocate memory for dummy buffer and associated BD
510 * table to be used by middle path (MP) requests
511 */
512 static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
513 {
514 int rc = 0;
515 struct iscsi_bd *mp_bdt;
516 u64 addr;
517
518 hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
519 &hba->mp_bd_dma, GFP_KERNEL);
520 if (!hba->mp_bd_tbl) {
521 printk(KERN_ERR "unable to allocate Middle Path BDT\n");
522 rc = -1;
523 goto out;
524 }
525
526 hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
527 &hba->dummy_buf_dma, GFP_KERNEL);
528 if (!hba->dummy_buffer) {
529 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
530 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
531 hba->mp_bd_tbl, hba->mp_bd_dma);
532 hba->mp_bd_tbl = NULL;
533 rc = -1;
534 goto out;
535 }
536
537 mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
538 addr = (unsigned long) hba->dummy_buf_dma;
539 mp_bdt->buffer_addr_lo = addr & 0xffffffff;
540 mp_bdt->buffer_addr_hi = addr >> 32;
541 mp_bdt->buffer_length = PAGE_SIZE;
542 mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
543 ISCSI_BD_FIRST_IN_BD_CHAIN;
544 out:
545 return rc;
546 }
547
548
549 /**
550 * bnx2i_free_mp_bdt - releases ITT back to free pool
551 * @hba: pointer to adapter instance
552 *
553 * free MP dummy buffer and associated BD table
554 */
555 static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
556 {
557 if (hba->mp_bd_tbl) {
558 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
559 hba->mp_bd_tbl, hba->mp_bd_dma);
560 hba->mp_bd_tbl = NULL;
561 }
562 if (hba->dummy_buffer) {
563 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
564 hba->dummy_buffer, hba->dummy_buf_dma);
565 hba->dummy_buffer = NULL;
566 }
567 return;
568 }
569
570 /**
571 * bnx2i_drop_session - notifies iscsid of connection error.
572 * @hba: adapter instance pointer
573 * @session: iscsi session pointer
574 *
575 * This notifies iscsid that there is a error, so it can initiate
576 * recovery.
577 *
578 * This relies on caller using the iscsi class iterator so the object
579 * is refcounted and does not disapper from under us.
580 */
581 void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
582 {
583 iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
584 }
585
586 /**
587 * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
588 * @hba: pointer to adapter instance
589 * @ep: pointer to endpoint (transport indentifier) structure
590 *
591 * EP destroy queue manager
592 */
593 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
594 struct bnx2i_endpoint *ep)
595 {
596 write_lock_bh(&hba->ep_rdwr_lock);
597 list_add_tail(&ep->link, &hba->ep_destroy_list);
598 write_unlock_bh(&hba->ep_rdwr_lock);
599 return 0;
600 }
601
602 /**
603 * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
604 *
605 * @hba: pointer to adapter instance
606 * @ep: pointer to endpoint (transport indentifier) structure
607 *
608 * EP destroy queue manager
609 */
610 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
611 struct bnx2i_endpoint *ep)
612 {
613 write_lock_bh(&hba->ep_rdwr_lock);
614 list_del_init(&ep->link);
615 write_unlock_bh(&hba->ep_rdwr_lock);
616
617 return 0;
618 }
619
620 /**
621 * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
622 * @hba: pointer to adapter instance
623 * @ep: pointer to endpoint (transport indentifier) structure
624 *
625 * pending conn offload completion queue manager
626 */
627 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
628 struct bnx2i_endpoint *ep)
629 {
630 write_lock_bh(&hba->ep_rdwr_lock);
631 list_add_tail(&ep->link, &hba->ep_ofld_list);
632 write_unlock_bh(&hba->ep_rdwr_lock);
633 return 0;
634 }
635
636 /**
637 * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
638 * @hba: pointer to adapter instance
639 * @ep: pointer to endpoint (transport indentifier) structure
640 *
641 * pending conn offload completion queue manager
642 */
643 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
644 struct bnx2i_endpoint *ep)
645 {
646 write_lock_bh(&hba->ep_rdwr_lock);
647 list_del_init(&ep->link);
648 write_unlock_bh(&hba->ep_rdwr_lock);
649 return 0;
650 }
651
652
653 /**
654 * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
655 *
656 * @hba: pointer to adapter instance
657 * @iscsi_cid: iscsi context ID to find
658 *
659 */
660 struct bnx2i_endpoint *
661 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
662 {
663 struct list_head *list;
664 struct list_head *tmp;
665 struct bnx2i_endpoint *ep;
666
667 read_lock_bh(&hba->ep_rdwr_lock);
668 list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
669 ep = (struct bnx2i_endpoint *)list;
670
671 if (ep->ep_iscsi_cid == iscsi_cid)
672 break;
673 ep = NULL;
674 }
675 read_unlock_bh(&hba->ep_rdwr_lock);
676
677 if (!ep)
678 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
679 return ep;
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_ep_active_list_add - add an entry to ep active list
713 * @hba: pointer to adapter instance
714 * @ep: pointer to endpoint (transport indentifier) structure
715 *
716 * current active conn queue manager
717 */
718 static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba,
719 struct bnx2i_endpoint *ep)
720 {
721 write_lock_bh(&hba->ep_rdwr_lock);
722 list_add_tail(&ep->link, &hba->ep_active_list);
723 write_unlock_bh(&hba->ep_rdwr_lock);
724 }
725
726
727 /**
728 * bnx2i_ep_active_list_del - deletes an entry to ep active list
729 * @hba: pointer to adapter instance
730 * @ep: pointer to endpoint (transport indentifier) structure
731 *
732 * current active conn queue manager
733 */
734 static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba,
735 struct bnx2i_endpoint *ep)
736 {
737 write_lock_bh(&hba->ep_rdwr_lock);
738 list_del_init(&ep->link);
739 write_unlock_bh(&hba->ep_rdwr_lock);
740 }
741
742
743 /**
744 * bnx2i_setup_host_queue_size - assigns shost->can_queue param
745 * @hba: pointer to adapter instance
746 * @shost: scsi host pointer
747 *
748 * Initializes 'can_queue' parameter based on how many outstanding commands
749 * the device can handle. Each device 5708/5709/57710 has different
750 * capabilities
751 */
752 static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
753 struct Scsi_Host *shost)
754 {
755 if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
756 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
757 else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
758 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
759 else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
760 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
761 else
762 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
763 }
764
765
766 /**
767 * bnx2i_alloc_hba - allocate and init adapter instance
768 * @cnic: cnic device pointer
769 *
770 * allocate & initialize adapter structure and call other
771 * support routines to do per adapter initialization
772 */
773 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
774 {
775 struct Scsi_Host *shost;
776 struct bnx2i_hba *hba;
777
778 shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
779 if (!shost)
780 return NULL;
781 shost->dma_boundary = cnic->pcidev->dma_mask;
782 shost->transportt = bnx2i_scsi_xport_template;
783 shost->max_id = ISCSI_MAX_CONNS_PER_HBA;
784 shost->max_channel = 0;
785 shost->max_lun = 512;
786 shost->max_cmd_len = 16;
787
788 hba = iscsi_host_priv(shost);
789 hba->shost = shost;
790 hba->netdev = cnic->netdev;
791 /* Get PCI related information and update hba struct members */
792 hba->pcidev = cnic->pcidev;
793 pci_dev_get(hba->pcidev);
794 hba->pci_did = hba->pcidev->device;
795 hba->pci_vid = hba->pcidev->vendor;
796 hba->pci_sdid = hba->pcidev->subsystem_device;
797 hba->pci_svid = hba->pcidev->subsystem_vendor;
798 hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
799 hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
800
801 bnx2i_identify_device(hba);
802 bnx2i_setup_host_queue_size(hba, shost);
803
804 if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
805 hba->regview = ioremap_nocache(hba->netdev->base_addr,
806 BNX2_MQ_CONFIG2);
807 if (!hba->regview)
808 goto ioreg_map_err;
809 } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
810 hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096);
811 if (!hba->regview)
812 goto ioreg_map_err;
813 }
814
815 if (bnx2i_setup_mp_bdt(hba))
816 goto mp_bdt_mem_err;
817
818 INIT_LIST_HEAD(&hba->ep_ofld_list);
819 INIT_LIST_HEAD(&hba->ep_active_list);
820 INIT_LIST_HEAD(&hba->ep_destroy_list);
821 rwlock_init(&hba->ep_rdwr_lock);
822
823 hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
824
825 /* different values for 5708/5709/57710 */
826 hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
827
828 if (bnx2i_setup_free_cid_que(hba))
829 goto cid_que_err;
830
831 /* SQ/RQ/CQ size can be changed via sysfx interface */
832 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
833 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
834 hba->max_sqes = sq_size;
835 else
836 hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
837 } else { /* 5706/5708/5709 */
838 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
839 hba->max_sqes = sq_size;
840 else
841 hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
842 }
843
844 hba->max_rqes = rq_size;
845 hba->max_cqes = hba->max_sqes + rq_size;
846 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
847 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
848 hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
849 } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
850 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
851
852 hba->num_ccell = hba->max_sqes / 2;
853
854 spin_lock_init(&hba->lock);
855 mutex_init(&hba->net_dev_lock);
856 init_waitqueue_head(&hba->eh_wait);
857 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
858 hba->hba_shutdown_tmo = 20 * HZ;
859 hba->conn_teardown_tmo = 20 * HZ;
860 hba->conn_ctx_destroy_tmo = 6 * HZ;
861 } else { /* 5706/5708/5709 */
862 hba->hba_shutdown_tmo = 20 * HZ;
863 hba->conn_teardown_tmo = 10 * HZ;
864 hba->conn_ctx_destroy_tmo = 2 * HZ;
865 }
866
867 if (iscsi_host_add(shost, &hba->pcidev->dev))
868 goto free_dump_mem;
869 return hba;
870
871 free_dump_mem:
872 bnx2i_release_free_cid_que(hba);
873 cid_que_err:
874 bnx2i_free_mp_bdt(hba);
875 mp_bdt_mem_err:
876 if (hba->regview) {
877 iounmap(hba->regview);
878 hba->regview = NULL;
879 }
880 ioreg_map_err:
881 pci_dev_put(hba->pcidev);
882 scsi_host_put(shost);
883 return NULL;
884 }
885
886 /**
887 * bnx2i_free_hba- releases hba structure and resources held by the adapter
888 * @hba: pointer to adapter instance
889 *
890 * free adapter structure and call various cleanup routines.
891 */
892 void bnx2i_free_hba(struct bnx2i_hba *hba)
893 {
894 struct Scsi_Host *shost = hba->shost;
895
896 iscsi_host_remove(shost);
897 INIT_LIST_HEAD(&hba->ep_ofld_list);
898 INIT_LIST_HEAD(&hba->ep_active_list);
899 INIT_LIST_HEAD(&hba->ep_destroy_list);
900 pci_dev_put(hba->pcidev);
901
902 if (hba->regview) {
903 iounmap(hba->regview);
904 hba->regview = NULL;
905 }
906 bnx2i_free_mp_bdt(hba);
907 bnx2i_release_free_cid_que(hba);
908 iscsi_host_free(shost);
909 }
910
911 /**
912 * bnx2i_conn_free_login_resources - free DMA resources used for login process
913 * @hba: pointer to adapter instance
914 * @bnx2i_conn: iscsi connection pointer
915 *
916 * Login related resources, mostly BDT & payload DMA memory is freed
917 */
918 static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
919 struct bnx2i_conn *bnx2i_conn)
920 {
921 if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
922 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
923 bnx2i_conn->gen_pdu.resp_bd_tbl,
924 bnx2i_conn->gen_pdu.resp_bd_dma);
925 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
926 }
927
928 if (bnx2i_conn->gen_pdu.req_bd_tbl) {
929 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
930 bnx2i_conn->gen_pdu.req_bd_tbl,
931 bnx2i_conn->gen_pdu.req_bd_dma);
932 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
933 }
934
935 if (bnx2i_conn->gen_pdu.resp_buf) {
936 dma_free_coherent(&hba->pcidev->dev,
937 ISCSI_DEF_MAX_RECV_SEG_LEN,
938 bnx2i_conn->gen_pdu.resp_buf,
939 bnx2i_conn->gen_pdu.resp_dma_addr);
940 bnx2i_conn->gen_pdu.resp_buf = NULL;
941 }
942
943 if (bnx2i_conn->gen_pdu.req_buf) {
944 dma_free_coherent(&hba->pcidev->dev,
945 ISCSI_DEF_MAX_RECV_SEG_LEN,
946 bnx2i_conn->gen_pdu.req_buf,
947 bnx2i_conn->gen_pdu.req_dma_addr);
948 bnx2i_conn->gen_pdu.req_buf = NULL;
949 }
950 }
951
952 /**
953 * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
954 * @hba: pointer to adapter instance
955 * @bnx2i_conn: iscsi connection pointer
956 *
957 * Mgmt task DNA resources are allocated in this routine.
958 */
959 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
960 struct bnx2i_conn *bnx2i_conn)
961 {
962 /* Allocate memory for login request/response buffers */
963 bnx2i_conn->gen_pdu.req_buf =
964 dma_alloc_coherent(&hba->pcidev->dev,
965 ISCSI_DEF_MAX_RECV_SEG_LEN,
966 &bnx2i_conn->gen_pdu.req_dma_addr,
967 GFP_KERNEL);
968 if (bnx2i_conn->gen_pdu.req_buf == NULL)
969 goto login_req_buf_failure;
970
971 bnx2i_conn->gen_pdu.req_buf_size = 0;
972 bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
973
974 bnx2i_conn->gen_pdu.resp_buf =
975 dma_alloc_coherent(&hba->pcidev->dev,
976 ISCSI_DEF_MAX_RECV_SEG_LEN,
977 &bnx2i_conn->gen_pdu.resp_dma_addr,
978 GFP_KERNEL);
979 if (bnx2i_conn->gen_pdu.resp_buf == NULL)
980 goto login_resp_buf_failure;
981
982 bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
983 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
984
985 bnx2i_conn->gen_pdu.req_bd_tbl =
986 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
987 &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
988 if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
989 goto login_req_bd_tbl_failure;
990
991 bnx2i_conn->gen_pdu.resp_bd_tbl =
992 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
993 &bnx2i_conn->gen_pdu.resp_bd_dma,
994 GFP_KERNEL);
995 if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
996 goto login_resp_bd_tbl_failure;
997
998 return 0;
999
1000 login_resp_bd_tbl_failure:
1001 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
1002 bnx2i_conn->gen_pdu.req_bd_tbl,
1003 bnx2i_conn->gen_pdu.req_bd_dma);
1004 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
1005
1006 login_req_bd_tbl_failure:
1007 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1008 bnx2i_conn->gen_pdu.resp_buf,
1009 bnx2i_conn->gen_pdu.resp_dma_addr);
1010 bnx2i_conn->gen_pdu.resp_buf = NULL;
1011 login_resp_buf_failure:
1012 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1013 bnx2i_conn->gen_pdu.req_buf,
1014 bnx2i_conn->gen_pdu.req_dma_addr);
1015 bnx2i_conn->gen_pdu.req_buf = NULL;
1016 login_req_buf_failure:
1017 iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
1018 "login resource alloc failed!!\n");
1019 return -ENOMEM;
1020
1021 }
1022
1023
1024 /**
1025 * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
1026 * @bnx2i_conn: iscsi connection pointer
1027 *
1028 * Allocates buffers and BD tables before shipping requests to cnic
1029 * for PDUs prepared by 'iscsid' daemon
1030 */
1031 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
1032 {
1033 struct iscsi_bd *bd_tbl;
1034
1035 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
1036
1037 bd_tbl->buffer_addr_hi =
1038 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
1039 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
1040 bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
1041 bnx2i_conn->gen_pdu.req_buf;
1042 bd_tbl->reserved0 = 0;
1043 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1044 ISCSI_BD_FIRST_IN_BD_CHAIN;
1045
1046 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1047 bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1048 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1049 bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1050 bd_tbl->reserved0 = 0;
1051 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1052 ISCSI_BD_FIRST_IN_BD_CHAIN;
1053 }
1054
1055
1056 /**
1057 * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1058 * @task: transport layer task pointer
1059 *
1060 * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1061 * Nop-out and Logout requests flow through this path.
1062 */
1063 static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1064 {
1065 struct bnx2i_cmd *cmd = task->dd_data;
1066 struct bnx2i_conn *bnx2i_conn = cmd->conn;
1067 int rc = 0;
1068 char *buf;
1069 int data_len;
1070
1071 bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1072 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1073 case ISCSI_OP_LOGIN:
1074 bnx2i_send_iscsi_login(bnx2i_conn, task);
1075 break;
1076 case ISCSI_OP_NOOP_OUT:
1077 data_len = bnx2i_conn->gen_pdu.req_buf_size;
1078 buf = bnx2i_conn->gen_pdu.req_buf;
1079 if (data_len)
1080 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1081 RESERVED_ITT,
1082 buf, data_len, 1);
1083 else
1084 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1085 RESERVED_ITT,
1086 NULL, 0, 1);
1087 break;
1088 case ISCSI_OP_LOGOUT:
1089 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1090 break;
1091 case ISCSI_OP_SCSI_TMFUNC:
1092 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1093 break;
1094 default:
1095 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1096 "send_gen: unsupported op 0x%x\n",
1097 task->hdr->opcode);
1098 }
1099 return rc;
1100 }
1101
1102
1103 /**********************************************************************
1104 * SCSI-ML Interface
1105 **********************************************************************/
1106
1107 /**
1108 * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1109 * @sc: SCSI-ML command pointer
1110 * @cmd: iscsi cmd pointer
1111 */
1112 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1113 {
1114 u32 dword;
1115 int lpcnt;
1116 u8 *srcp;
1117 u32 *dstp;
1118 u32 scsi_lun[2];
1119
1120 int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1121 cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1122 cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1123
1124 lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1125 srcp = (u8 *) sc->cmnd;
1126 dstp = (u32 *) cmd->req.cdb;
1127 while (lpcnt--) {
1128 memcpy(&dword, (const void *) srcp, 4);
1129 *dstp = cpu_to_be32(dword);
1130 srcp += 4;
1131 dstp++;
1132 }
1133 if (sc->cmd_len & 0x3) {
1134 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1135 *dstp = cpu_to_be32(dword);
1136 }
1137 }
1138
1139 static void bnx2i_cleanup_task(struct iscsi_task *task)
1140 {
1141 struct iscsi_conn *conn = task->conn;
1142 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1143 struct bnx2i_hba *hba = bnx2i_conn->hba;
1144
1145 /*
1146 * mgmt task or cmd was never sent to us to transmit.
1147 */
1148 if (!task->sc || task->state == ISCSI_TASK_PENDING)
1149 return;
1150 /*
1151 * need to clean-up task context to claim dma buffers
1152 */
1153 if (task->state == ISCSI_TASK_ABRT_TMF) {
1154 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1155
1156 spin_unlock_bh(&conn->session->lock);
1157 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1158 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1159 spin_lock_bh(&conn->session->lock);
1160 }
1161 bnx2i_iscsi_unmap_sg_list(task->dd_data);
1162 }
1163
1164 /**
1165 * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1166 * @conn: transport layer conn structure pointer
1167 * @task: transport layer command structure pointer
1168 */
1169 static int
1170 bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1171 {
1172 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1173 struct bnx2i_cmd *cmd = task->dd_data;
1174
1175 memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1176
1177 bnx2i_setup_cmd_wqe_template(cmd);
1178 bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1179 if (task->data_count) {
1180 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1181 task->data_count);
1182 bnx2i_conn->gen_pdu.req_wr_ptr =
1183 bnx2i_conn->gen_pdu.req_buf + task->data_count;
1184 }
1185 cmd->conn = conn->dd_data;
1186 cmd->scsi_cmd = NULL;
1187 return bnx2i_iscsi_send_generic_request(task);
1188 }
1189
1190 /**
1191 * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1192 * @task: transport layer command structure pointer
1193 *
1194 * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1195 */
1196 static int bnx2i_task_xmit(struct iscsi_task *task)
1197 {
1198 struct iscsi_conn *conn = task->conn;
1199 struct iscsi_session *session = conn->session;
1200 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1201 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1202 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1203 struct scsi_cmnd *sc = task->sc;
1204 struct bnx2i_cmd *cmd = task->dd_data;
1205 struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr;
1206
1207 /*
1208 * If there is no scsi_cmnd this must be a mgmt task
1209 */
1210 if (!sc)
1211 return bnx2i_mtask_xmit(conn, task);
1212
1213 bnx2i_setup_cmd_wqe_template(cmd);
1214 cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1215 cmd->conn = bnx2i_conn;
1216 cmd->scsi_cmd = sc;
1217 cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1218 cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1219
1220 bnx2i_iscsi_map_sg_list(cmd);
1221 bnx2i_cpy_scsi_cdb(sc, cmd);
1222
1223 cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1224 if (sc->sc_data_direction == DMA_TO_DEVICE) {
1225 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1226 cmd->req.itt = task->itt |
1227 (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1228 bnx2i_setup_write_cmd_bd_info(task);
1229 } else {
1230 if (scsi_bufflen(sc))
1231 cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1232 cmd->req.itt = task->itt |
1233 (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1234 }
1235
1236 cmd->req.num_bds = cmd->io_tbl.bd_valid;
1237 if (!cmd->io_tbl.bd_valid) {
1238 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1239 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1240 cmd->req.num_bds = 1;
1241 }
1242
1243 bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1244 return 0;
1245 }
1246
1247 /**
1248 * bnx2i_session_create - create a new iscsi session
1249 * @cmds_max: max commands supported
1250 * @qdepth: scsi queue depth to support
1251 * @initial_cmdsn: initial iscsi CMDSN to be used for this session
1252 *
1253 * Creates a new iSCSI session instance on given device.
1254 */
1255 static struct iscsi_cls_session *
1256 bnx2i_session_create(struct iscsi_endpoint *ep,
1257 uint16_t cmds_max, uint16_t qdepth,
1258 uint32_t initial_cmdsn)
1259 {
1260 struct Scsi_Host *shost;
1261 struct iscsi_cls_session *cls_session;
1262 struct bnx2i_hba *hba;
1263 struct bnx2i_endpoint *bnx2i_ep;
1264
1265 if (!ep) {
1266 printk(KERN_ERR "bnx2i: missing ep.\n");
1267 return NULL;
1268 }
1269
1270 bnx2i_ep = ep->dd_data;
1271 shost = bnx2i_ep->hba->shost;
1272 hba = iscsi_host_priv(shost);
1273 if (bnx2i_adapter_ready(hba))
1274 return NULL;
1275
1276 /*
1277 * user can override hw limit as long as it is within
1278 * the min/max.
1279 */
1280 if (cmds_max > hba->max_sqes)
1281 cmds_max = hba->max_sqes;
1282 else if (cmds_max < BNX2I_SQ_WQES_MIN)
1283 cmds_max = BNX2I_SQ_WQES_MIN;
1284
1285 cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1286 cmds_max, 0, sizeof(struct bnx2i_cmd),
1287 initial_cmdsn, ISCSI_MAX_TARGET);
1288 if (!cls_session)
1289 return NULL;
1290
1291 if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1292 goto session_teardown;
1293 return cls_session;
1294
1295 session_teardown:
1296 iscsi_session_teardown(cls_session);
1297 return NULL;
1298 }
1299
1300
1301 /**
1302 * bnx2i_session_destroy - destroys iscsi session
1303 * @cls_session: pointer to iscsi cls session
1304 *
1305 * Destroys previously created iSCSI session instance and releases
1306 * all resources held by it
1307 */
1308 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1309 {
1310 struct iscsi_session *session = cls_session->dd_data;
1311 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1312 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1313
1314 bnx2i_destroy_cmd_pool(hba, session);
1315 iscsi_session_teardown(cls_session);
1316 }
1317
1318
1319 /**
1320 * bnx2i_conn_create - create iscsi connection instance
1321 * @cls_session: pointer to iscsi cls session
1322 * @cid: iscsi cid as per rfc (not NX2's CID terminology)
1323 *
1324 * Creates a new iSCSI connection instance for a given session
1325 */
1326 static struct iscsi_cls_conn *
1327 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1328 {
1329 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1330 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1331 struct bnx2i_conn *bnx2i_conn;
1332 struct iscsi_cls_conn *cls_conn;
1333 struct iscsi_conn *conn;
1334
1335 cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1336 cid);
1337 if (!cls_conn)
1338 return NULL;
1339 conn = cls_conn->dd_data;
1340
1341 bnx2i_conn = conn->dd_data;
1342 bnx2i_conn->cls_conn = cls_conn;
1343 bnx2i_conn->hba = hba;
1344 /* 'ep' ptr will be assigned in bind() call */
1345 bnx2i_conn->ep = NULL;
1346 init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1347
1348 if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1349 iscsi_conn_printk(KERN_ALERT, conn,
1350 "conn_new: login resc alloc failed!!\n");
1351 goto free_conn;
1352 }
1353
1354 return cls_conn;
1355
1356 free_conn:
1357 iscsi_conn_teardown(cls_conn);
1358 return NULL;
1359 }
1360
1361 /**
1362 * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1363 * @cls_session: pointer to iscsi cls session
1364 * @cls_conn: pointer to iscsi cls conn
1365 * @transport_fd: 64-bit EP handle
1366 * @is_leading: leading connection on this session?
1367 *
1368 * Binds together iSCSI session instance, iSCSI connection instance
1369 * and the TCP connection. This routine returns error code if
1370 * TCP connection does not belong on the device iSCSI sess/conn
1371 * is bound
1372 */
1373 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1374 struct iscsi_cls_conn *cls_conn,
1375 uint64_t transport_fd, int is_leading)
1376 {
1377 struct iscsi_conn *conn = cls_conn->dd_data;
1378 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1379 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1380 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1381 struct bnx2i_endpoint *bnx2i_ep;
1382 struct iscsi_endpoint *ep;
1383 int ret_code;
1384
1385 ep = iscsi_lookup_endpoint(transport_fd);
1386 if (!ep)
1387 return -EINVAL;
1388
1389 bnx2i_ep = ep->dd_data;
1390 if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1391 (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1392 /* Peer disconnect via' FIN or RST */
1393 return -EINVAL;
1394
1395 if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1396 return -EINVAL;
1397
1398 if (bnx2i_ep->hba != hba) {
1399 /* Error - TCP connection does not belong to this device
1400 */
1401 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1402 "conn bind, ep=0x%p (%s) does not",
1403 bnx2i_ep, bnx2i_ep->hba->netdev->name);
1404 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1405 "belong to hba (%s)\n",
1406 hba->netdev->name);
1407 return -EEXIST;
1408 }
1409
1410 bnx2i_ep->conn = bnx2i_conn;
1411 bnx2i_conn->ep = bnx2i_ep;
1412 bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1413 bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1414
1415 ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1416 bnx2i_ep->ep_iscsi_cid);
1417
1418 /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1419 * driver needs to explicitly replenish RQ index during setup.
1420 */
1421 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1422 bnx2i_put_rq_buf(bnx2i_conn, 0);
1423
1424 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1425 return ret_code;
1426 }
1427
1428
1429 /**
1430 * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1431 * @cls_conn: pointer to iscsi cls conn
1432 *
1433 * Destroy an iSCSI connection instance and release memory resources held by
1434 * this connection
1435 */
1436 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1437 {
1438 struct iscsi_conn *conn = cls_conn->dd_data;
1439 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1440 struct Scsi_Host *shost;
1441 struct bnx2i_hba *hba;
1442
1443 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1444 hba = iscsi_host_priv(shost);
1445
1446 bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1447 iscsi_conn_teardown(cls_conn);
1448 }
1449
1450
1451 /**
1452 * bnx2i_conn_get_param - return iscsi connection parameter to caller
1453 * @cls_conn: pointer to iscsi cls conn
1454 * @param: parameter type identifier
1455 * @buf: buffer pointer
1456 *
1457 * returns iSCSI connection parameters
1458 */
1459 static int bnx2i_conn_get_param(struct iscsi_cls_conn *cls_conn,
1460 enum iscsi_param param, char *buf)
1461 {
1462 struct iscsi_conn *conn = cls_conn->dd_data;
1463 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1464 int len = 0;
1465
1466 switch (param) {
1467 case ISCSI_PARAM_CONN_PORT:
1468 if (bnx2i_conn->ep)
1469 len = sprintf(buf, "%hu\n",
1470 bnx2i_conn->ep->cm_sk->dst_port);
1471 break;
1472 case ISCSI_PARAM_CONN_ADDRESS:
1473 if (bnx2i_conn->ep)
1474 len = sprintf(buf, "%pI4\n",
1475 &bnx2i_conn->ep->cm_sk->dst_ip);
1476 break;
1477 default:
1478 return iscsi_conn_get_param(cls_conn, param, buf);
1479 }
1480
1481 return len;
1482 }
1483
1484 /**
1485 * bnx2i_host_get_param - returns host (adapter) related parameters
1486 * @shost: scsi host pointer
1487 * @param: parameter type identifier
1488 * @buf: buffer pointer
1489 */
1490 static int bnx2i_host_get_param(struct Scsi_Host *shost,
1491 enum iscsi_host_param param, char *buf)
1492 {
1493 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1494 int len = 0;
1495
1496 switch (param) {
1497 case ISCSI_HOST_PARAM_HWADDRESS:
1498 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1499 break;
1500 case ISCSI_HOST_PARAM_NETDEV_NAME:
1501 len = sprintf(buf, "%s\n", hba->netdev->name);
1502 break;
1503 case ISCSI_HOST_PARAM_IPADDRESS: {
1504 struct list_head *active_list = &hba->ep_active_list;
1505
1506 read_lock_bh(&hba->ep_rdwr_lock);
1507 if (!list_empty(&hba->ep_active_list)) {
1508 struct bnx2i_endpoint *bnx2i_ep;
1509 struct cnic_sock *csk;
1510
1511 bnx2i_ep = list_first_entry(active_list,
1512 struct bnx2i_endpoint,
1513 link);
1514 csk = bnx2i_ep->cm_sk;
1515 if (test_bit(SK_F_IPV6, &csk->flags))
1516 len = sprintf(buf, "%pI6\n", csk->src_ip);
1517 else
1518 len = sprintf(buf, "%pI4\n", csk->src_ip);
1519 }
1520 read_unlock_bh(&hba->ep_rdwr_lock);
1521 break;
1522 }
1523 default:
1524 return iscsi_host_get_param(shost, param, buf);
1525 }
1526 return len;
1527 }
1528
1529 /**
1530 * bnx2i_conn_start - completes iscsi connection migration to FFP
1531 * @cls_conn: pointer to iscsi cls conn
1532 *
1533 * last call in FFP migration to handover iscsi conn to the driver
1534 */
1535 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1536 {
1537 struct iscsi_conn *conn = cls_conn->dd_data;
1538 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1539
1540 bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1541 bnx2i_update_iscsi_conn(conn);
1542
1543 /*
1544 * this should normally not sleep for a long time so it should
1545 * not disrupt the caller.
1546 */
1547 bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1548 bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1549 bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
1550 add_timer(&bnx2i_conn->ep->ofld_timer);
1551 /* update iSCSI context for this conn, wait for CNIC to complete */
1552 wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1553 bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1554
1555 if (signal_pending(current))
1556 flush_signals(current);
1557 del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1558
1559 iscsi_conn_start(cls_conn);
1560 return 0;
1561 }
1562
1563
1564 /**
1565 * bnx2i_conn_get_stats - returns iSCSI stats
1566 * @cls_conn: pointer to iscsi cls conn
1567 * @stats: pointer to iscsi statistic struct
1568 */
1569 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1570 struct iscsi_stats *stats)
1571 {
1572 struct iscsi_conn *conn = cls_conn->dd_data;
1573
1574 stats->txdata_octets = conn->txdata_octets;
1575 stats->rxdata_octets = conn->rxdata_octets;
1576 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1577 stats->dataout_pdus = conn->dataout_pdus_cnt;
1578 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1579 stats->datain_pdus = conn->datain_pdus_cnt;
1580 stats->r2t_pdus = conn->r2t_pdus_cnt;
1581 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1582 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1583 stats->custom_length = 3;
1584 strcpy(stats->custom[2].desc, "eh_abort_cnt");
1585 stats->custom[2].value = conn->eh_abort_cnt;
1586 stats->digest_err = 0;
1587 stats->timeout_err = 0;
1588 stats->custom_length = 0;
1589 }
1590
1591
1592 /**
1593 * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1594 * @dst_addr: target IP address
1595 *
1596 * check if route resolves to BNX2 device
1597 */
1598 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1599 {
1600 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1601 struct bnx2i_hba *hba;
1602 struct cnic_dev *cnic = NULL;
1603
1604 bnx2i_reg_dev_all();
1605
1606 hba = get_adapter_list_head();
1607 if (hba && hba->cnic)
1608 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1609 if (!cnic) {
1610 printk(KERN_ALERT "bnx2i: no route,"
1611 "can't connect using cnic\n");
1612 goto no_nx2_route;
1613 }
1614 hba = bnx2i_find_hba_for_cnic(cnic);
1615 if (!hba)
1616 goto no_nx2_route;
1617
1618 if (bnx2i_adapter_ready(hba)) {
1619 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1620 goto no_nx2_route;
1621 }
1622 if (hba->netdev->mtu > hba->mtu_supported) {
1623 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1624 hba->netdev->name, hba->netdev->mtu);
1625 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1626 hba->mtu_supported);
1627 goto no_nx2_route;
1628 }
1629 return hba;
1630 no_nx2_route:
1631 return NULL;
1632 }
1633
1634
1635 /**
1636 * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1637 * @hba: pointer to adapter instance
1638 * @ep: endpoint (transport indentifier) structure
1639 *
1640 * destroys cm_sock structure and on chip iscsi context
1641 */
1642 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1643 struct bnx2i_endpoint *ep)
1644 {
1645 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
1646 hba->cnic->cm_destroy(ep->cm_sk);
1647
1648 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
1649 ep->state = EP_STATE_DISCONN_COMPL;
1650
1651 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1652 ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1653 printk(KERN_ALERT "bnx2i - ERROR - please submit GRC Dump,"
1654 " NW/PCIe trace, driver msgs to developers"
1655 " for analysis\n");
1656 return 1;
1657 }
1658
1659 ep->state = EP_STATE_CLEANUP_START;
1660 init_timer(&ep->ofld_timer);
1661 ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies;
1662 ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1663 ep->ofld_timer.data = (unsigned long) ep;
1664 add_timer(&ep->ofld_timer);
1665
1666 bnx2i_ep_destroy_list_add(hba, ep);
1667
1668 /* destroy iSCSI context, wait for it to complete */
1669 bnx2i_send_conn_destroy(hba, ep);
1670 wait_event_interruptible(ep->ofld_wait,
1671 (ep->state != EP_STATE_CLEANUP_START));
1672
1673 if (signal_pending(current))
1674 flush_signals(current);
1675 del_timer_sync(&ep->ofld_timer);
1676
1677 bnx2i_ep_destroy_list_del(hba, ep);
1678
1679 if (ep->state != EP_STATE_CLEANUP_CMPL)
1680 /* should never happen */
1681 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1682
1683 return 0;
1684 }
1685
1686
1687 /**
1688 * bnx2i_ep_connect - establish TCP connection to target portal
1689 * @shost: scsi host
1690 * @dst_addr: target IP address
1691 * @non_blocking: blocking or non-blocking call
1692 *
1693 * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1694 * with l5_core and the CNIC. This is a multi-step process of resolving
1695 * route to target, create a iscsi connection context, handshaking with
1696 * CNIC module to create/initialize the socket struct and finally
1697 * sending down option-2 request to complete TCP 3-way handshake
1698 */
1699 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1700 struct sockaddr *dst_addr,
1701 int non_blocking)
1702 {
1703 u32 iscsi_cid = BNX2I_CID_RESERVED;
1704 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1705 struct sockaddr_in6 *desti6;
1706 struct bnx2i_endpoint *bnx2i_ep;
1707 struct bnx2i_hba *hba;
1708 struct cnic_dev *cnic;
1709 struct cnic_sockaddr saddr;
1710 struct iscsi_endpoint *ep;
1711 int rc = 0;
1712
1713 if (shost) {
1714 /* driver is given scsi host to work with */
1715 hba = iscsi_host_priv(shost);
1716 /* Register the device with cnic if not already done so */
1717 bnx2i_register_device(hba);
1718 } else
1719 /*
1720 * check if the given destination can be reached through
1721 * a iscsi capable NetXtreme2 device
1722 */
1723 hba = bnx2i_check_route(dst_addr);
1724
1725 if (!hba || test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state)) {
1726 rc = -EINVAL;
1727 goto nohba;
1728 }
1729
1730 cnic = hba->cnic;
1731 mutex_lock(&hba->net_dev_lock);
1732 ep = bnx2i_alloc_ep(hba);
1733 if (!ep) {
1734 rc = -ENOMEM;
1735 goto check_busy;
1736 }
1737 bnx2i_ep = ep->dd_data;
1738
1739 if (bnx2i_adapter_ready(hba)) {
1740 rc = -EPERM;
1741 goto net_if_down;
1742 }
1743
1744 bnx2i_ep->num_active_cmds = 0;
1745 iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1746 if (iscsi_cid == -1) {
1747 printk(KERN_ALERT "alloc_ep: unable to allocate iscsi cid\n");
1748 rc = -ENOMEM;
1749 goto iscsi_cid_err;
1750 }
1751 bnx2i_ep->hba_age = hba->age;
1752
1753 rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1754 if (rc != 0) {
1755 printk(KERN_ALERT "bnx2i: ep_conn, alloc QP resc error\n");
1756 rc = -ENOMEM;
1757 goto qp_resc_err;
1758 }
1759
1760 bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1761 bnx2i_ep->state = EP_STATE_OFLD_START;
1762 bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1763
1764 init_timer(&bnx2i_ep->ofld_timer);
1765 bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1766 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1767 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1768 add_timer(&bnx2i_ep->ofld_timer);
1769
1770 bnx2i_send_conn_ofld_req(hba, bnx2i_ep);
1771
1772 /* Wait for CNIC hardware to setup conn context and return 'cid' */
1773 wait_event_interruptible(bnx2i_ep->ofld_wait,
1774 bnx2i_ep->state != EP_STATE_OFLD_START);
1775
1776 if (signal_pending(current))
1777 flush_signals(current);
1778 del_timer_sync(&bnx2i_ep->ofld_timer);
1779
1780 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1781
1782 if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1783 rc = -ENOSPC;
1784 goto conn_failed;
1785 }
1786
1787 rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1788 iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1789 if (rc) {
1790 rc = -EINVAL;
1791 goto conn_failed;
1792 }
1793
1794 bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1795 bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1796 clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1797
1798 memset(&saddr, 0, sizeof(saddr));
1799 if (dst_addr->sa_family == AF_INET) {
1800 desti = (struct sockaddr_in *) dst_addr;
1801 saddr.remote.v4 = *desti;
1802 saddr.local.v4.sin_family = desti->sin_family;
1803 } else if (dst_addr->sa_family == AF_INET6) {
1804 desti6 = (struct sockaddr_in6 *) dst_addr;
1805 saddr.remote.v6 = *desti6;
1806 saddr.local.v6.sin6_family = desti6->sin6_family;
1807 }
1808
1809 bnx2i_ep->timestamp = jiffies;
1810 bnx2i_ep->state = EP_STATE_CONNECT_START;
1811 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1812 rc = -EINVAL;
1813 goto conn_failed;
1814 } else
1815 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1816 if (rc)
1817 goto release_ep;
1818
1819 bnx2i_ep_active_list_add(hba, bnx2i_ep);
1820
1821 if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
1822 goto del_active_ep;
1823
1824 mutex_unlock(&hba->net_dev_lock);
1825 return ep;
1826
1827 del_active_ep:
1828 bnx2i_ep_active_list_del(hba, bnx2i_ep);
1829 release_ep:
1830 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1831 mutex_unlock(&hba->net_dev_lock);
1832 return ERR_PTR(rc);
1833 }
1834 conn_failed:
1835 net_if_down:
1836 iscsi_cid_err:
1837 bnx2i_free_qp_resc(hba, bnx2i_ep);
1838 qp_resc_err:
1839 bnx2i_free_ep(ep);
1840 check_busy:
1841 mutex_unlock(&hba->net_dev_lock);
1842 nohba:
1843 bnx2i_unreg_dev_all();
1844 return ERR_PTR(rc);
1845 }
1846
1847
1848 /**
1849 * bnx2i_ep_poll - polls for TCP connection establishement
1850 * @ep: TCP connection (endpoint) handle
1851 * @timeout_ms: timeout value in milli secs
1852 *
1853 * polls for TCP connect request to complete
1854 */
1855 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1856 {
1857 struct bnx2i_endpoint *bnx2i_ep;
1858 int rc = 0;
1859
1860 bnx2i_ep = ep->dd_data;
1861 if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1862 (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1863 (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1864 return -1;
1865 if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1866 return 1;
1867
1868 rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1869 ((bnx2i_ep->state ==
1870 EP_STATE_OFLD_FAILED) ||
1871 (bnx2i_ep->state ==
1872 EP_STATE_CONNECT_FAILED) ||
1873 (bnx2i_ep->state ==
1874 EP_STATE_CONNECT_COMPL)),
1875 msecs_to_jiffies(timeout_ms));
1876 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED)
1877 rc = -1;
1878
1879 if (rc > 0)
1880 return 1;
1881 else if (!rc)
1882 return 0; /* timeout */
1883 else
1884 return rc;
1885 }
1886
1887
1888 /**
1889 * bnx2i_ep_tcp_conn_active - check EP state transition
1890 * @ep: endpoint pointer
1891 *
1892 * check if underlying TCP connection is active
1893 */
1894 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1895 {
1896 int ret;
1897 int cnic_dev_10g = 0;
1898
1899 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1900 cnic_dev_10g = 1;
1901
1902 switch (bnx2i_ep->state) {
1903 case EP_STATE_CONNECT_START:
1904 case EP_STATE_CLEANUP_FAILED:
1905 case EP_STATE_OFLD_FAILED:
1906 case EP_STATE_DISCONN_TIMEDOUT:
1907 ret = 0;
1908 break;
1909 case EP_STATE_CONNECT_COMPL:
1910 case EP_STATE_ULP_UPDATE_START:
1911 case EP_STATE_ULP_UPDATE_COMPL:
1912 case EP_STATE_TCP_FIN_RCVD:
1913 case EP_STATE_LOGOUT_SENT:
1914 case EP_STATE_LOGOUT_RESP_RCVD:
1915 case EP_STATE_ULP_UPDATE_FAILED:
1916 ret = 1;
1917 break;
1918 case EP_STATE_TCP_RST_RCVD:
1919 ret = 0;
1920 break;
1921 case EP_STATE_CONNECT_FAILED:
1922 if (cnic_dev_10g)
1923 ret = 1;
1924 else
1925 ret = 0;
1926 break;
1927 default:
1928 ret = 0;
1929 }
1930
1931 return ret;
1932 }
1933
1934
1935 /*
1936 * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw
1937 * @ep: TCP connection (bnx2i endpoint) handle
1938 *
1939 * executes TCP connection teardown process
1940 */
1941 int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep)
1942 {
1943 struct bnx2i_hba *hba = bnx2i_ep->hba;
1944 struct cnic_dev *cnic;
1945 struct iscsi_session *session = NULL;
1946 struct iscsi_conn *conn = NULL;
1947 int ret = 0;
1948 int close = 0;
1949 int close_ret = 0;
1950
1951 if (!hba)
1952 return 0;
1953
1954 cnic = hba->cnic;
1955 if (!cnic)
1956 return 0;
1957
1958 if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
1959 goto destroy_conn;
1960
1961 if (bnx2i_ep->conn) {
1962 conn = bnx2i_ep->conn->cls_conn->dd_data;
1963 session = conn->session;
1964 }
1965
1966 init_timer(&bnx2i_ep->ofld_timer);
1967 bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies;
1968 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1969 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1970 add_timer(&bnx2i_ep->ofld_timer);
1971
1972 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
1973 goto out;
1974
1975 if (session) {
1976 spin_lock_bh(&session->lock);
1977 if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) {
1978 if (session->state == ISCSI_STATE_LOGGING_OUT) {
1979 if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) {
1980 /* Logout sent, but no resp */
1981 printk(KERN_ALERT "bnx2i - WARNING "
1982 "logout response was not "
1983 "received!\n");
1984 } else if (bnx2i_ep->state ==
1985 EP_STATE_LOGOUT_RESP_RCVD)
1986 close = 1;
1987 }
1988 } else
1989 close = 1;
1990
1991 spin_unlock_bh(&session->lock);
1992 }
1993
1994 bnx2i_ep->state = EP_STATE_DISCONN_START;
1995
1996 if (close)
1997 close_ret = cnic->cm_close(bnx2i_ep->cm_sk);
1998 else
1999 close_ret = cnic->cm_abort(bnx2i_ep->cm_sk);
2000
2001 if (close_ret)
2002 bnx2i_ep->state = EP_STATE_DISCONN_COMPL;
2003
2004 /* wait for option-2 conn teardown */
2005 wait_event_interruptible(bnx2i_ep->ofld_wait,
2006 bnx2i_ep->state != EP_STATE_DISCONN_START);
2007
2008 if (signal_pending(current))
2009 flush_signals(current);
2010 del_timer_sync(&bnx2i_ep->ofld_timer);
2011
2012 destroy_conn:
2013 bnx2i_ep_active_list_del(hba, bnx2i_ep);
2014 if (bnx2i_tear_down_conn(hba, bnx2i_ep))
2015 ret = -EINVAL;
2016 out:
2017 bnx2i_ep->state = EP_STATE_IDLE;
2018 return ret;
2019 }
2020
2021
2022 /**
2023 * bnx2i_ep_disconnect - executes TCP connection teardown process
2024 * @ep: TCP connection (iscsi endpoint) handle
2025 *
2026 * executes TCP connection teardown process
2027 */
2028 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
2029 {
2030 struct bnx2i_endpoint *bnx2i_ep;
2031 struct bnx2i_conn *bnx2i_conn = NULL;
2032 struct iscsi_conn *conn = NULL;
2033 struct bnx2i_hba *hba;
2034
2035 bnx2i_ep = ep->dd_data;
2036
2037 /* driver should not attempt connection cleanup until TCP_CONNECT
2038 * completes either successfully or fails. Timeout is 9-secs, so
2039 * wait for it to complete
2040 */
2041 while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
2042 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
2043 msleep(250);
2044
2045 if (bnx2i_ep->conn) {
2046 bnx2i_conn = bnx2i_ep->conn;
2047 conn = bnx2i_conn->cls_conn->dd_data;
2048 iscsi_suspend_queue(conn);
2049 }
2050 hba = bnx2i_ep->hba;
2051
2052 mutex_lock(&hba->net_dev_lock);
2053
2054 if (bnx2i_ep->state == EP_STATE_IDLE)
2055 goto return_bnx2i_ep;
2056
2057 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2058 goto free_resc;
2059
2060 if (bnx2i_ep->hba_age != hba->age)
2061 goto free_resc;
2062
2063 /* Do all chip cleanup here */
2064 if (bnx2i_hw_ep_disconnect(bnx2i_ep)) {
2065 mutex_unlock(&hba->net_dev_lock);
2066 return;
2067 }
2068 free_resc:
2069 bnx2i_free_qp_resc(hba, bnx2i_ep);
2070 return_bnx2i_ep:
2071 if (bnx2i_conn)
2072 bnx2i_conn->ep = NULL;
2073
2074 bnx2i_free_ep(ep);
2075 mutex_unlock(&hba->net_dev_lock);
2076 if (!hba->ofld_conns_active)
2077 bnx2i_unreg_dev_all();
2078
2079 wake_up_interruptible(&hba->eh_wait);
2080 }
2081
2082
2083 /**
2084 * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
2085 * @buf: pointer to buffer containing iscsi path message
2086 *
2087 */
2088 static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
2089 {
2090 struct bnx2i_hba *hba = iscsi_host_priv(shost);
2091 char *buf = (char *) params;
2092 u16 len = sizeof(*params);
2093
2094 /* handled by cnic driver */
2095 hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
2096 len);
2097
2098 return 0;
2099 }
2100
2101
2102 /*
2103 * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
2104 * used while registering with the scsi host and iSCSI transport module.
2105 */
2106 static struct scsi_host_template bnx2i_host_template = {
2107 .module = THIS_MODULE,
2108 .name = "Broadcom Offload iSCSI Initiator",
2109 .proc_name = "bnx2i",
2110 .queuecommand = iscsi_queuecommand,
2111 .eh_abort_handler = iscsi_eh_abort,
2112 .eh_device_reset_handler = iscsi_eh_device_reset,
2113 .eh_target_reset_handler = iscsi_eh_recover_target,
2114 .change_queue_depth = iscsi_change_queue_depth,
2115 .can_queue = 1024,
2116 .max_sectors = 127,
2117 .cmd_per_lun = 32,
2118 .this_id = -1,
2119 .use_clustering = ENABLE_CLUSTERING,
2120 .sg_tablesize = ISCSI_MAX_BDS_PER_CMD,
2121 .shost_attrs = bnx2i_dev_attributes,
2122 };
2123
2124 struct iscsi_transport bnx2i_iscsi_transport = {
2125 .owner = THIS_MODULE,
2126 .name = "bnx2i",
2127 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST |
2128 CAP_MULTI_R2T | CAP_DATADGST |
2129 CAP_DATA_PATH_OFFLOAD,
2130 .param_mask = ISCSI_MAX_RECV_DLENGTH |
2131 ISCSI_MAX_XMIT_DLENGTH |
2132 ISCSI_HDRDGST_EN |
2133 ISCSI_DATADGST_EN |
2134 ISCSI_INITIAL_R2T_EN |
2135 ISCSI_MAX_R2T |
2136 ISCSI_IMM_DATA_EN |
2137 ISCSI_FIRST_BURST |
2138 ISCSI_MAX_BURST |
2139 ISCSI_PDU_INORDER_EN |
2140 ISCSI_DATASEQ_INORDER_EN |
2141 ISCSI_ERL |
2142 ISCSI_CONN_PORT |
2143 ISCSI_CONN_ADDRESS |
2144 ISCSI_EXP_STATSN |
2145 ISCSI_PERSISTENT_PORT |
2146 ISCSI_PERSISTENT_ADDRESS |
2147 ISCSI_TARGET_NAME | ISCSI_TPGT |
2148 ISCSI_USERNAME | ISCSI_PASSWORD |
2149 ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
2150 ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
2151 ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO |
2152 ISCSI_PING_TMO | ISCSI_RECV_TMO |
2153 ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
2154 .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
2155 ISCSI_HOST_NETDEV_NAME,
2156 .create_session = bnx2i_session_create,
2157 .destroy_session = bnx2i_session_destroy,
2158 .create_conn = bnx2i_conn_create,
2159 .bind_conn = bnx2i_conn_bind,
2160 .destroy_conn = bnx2i_conn_destroy,
2161 .set_param = iscsi_set_param,
2162 .get_conn_param = bnx2i_conn_get_param,
2163 .get_session_param = iscsi_session_get_param,
2164 .get_host_param = bnx2i_host_get_param,
2165 .start_conn = bnx2i_conn_start,
2166 .stop_conn = iscsi_conn_stop,
2167 .send_pdu = iscsi_conn_send_pdu,
2168 .xmit_task = bnx2i_task_xmit,
2169 .get_stats = bnx2i_conn_get_stats,
2170 /* TCP connect - disconnect - option-2 interface calls */
2171 .ep_connect = bnx2i_ep_connect,
2172 .ep_poll = bnx2i_ep_poll,
2173 .ep_disconnect = bnx2i_ep_disconnect,
2174 .set_path = bnx2i_nl_set_path,
2175 /* Error recovery timeout call */
2176 .session_recovery_timedout = iscsi_session_recovery_timedout,
2177 .cleanup_task = bnx2i_cleanup_task,
2178 };
Tomato firmware and modifications.