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Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
[deliverable/linux.git] / drivers / scsi / bnx2i / bnx2i_iscsi.c
1 /*
2 * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver.
3 *
4 * Copyright (c) 2006 - 2012 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 DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
31
32 static int bnx2i_adapter_ready(struct bnx2i_hba *hba)
33 {
34 int retval = 0;
35
36 if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
37 test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
38 test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
39 retval = -EPERM;
40 return retval;
41 }
42
43 /**
44 * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks
45 * @cmd: iscsi cmd struct pointer
46 * @buf_off: absolute buffer offset
47 * @start_bd_off: u32 pointer to return the offset within the BD
48 * indicated by 'start_bd_idx' on which 'buf_off' falls
49 * @start_bd_idx: index of the BD on which 'buf_off' falls
50 *
51 * identifies & marks various bd info for scsi command's imm data,
52 * unsolicited data and the first solicited data seq.
53 */
54 static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off,
55 u32 *start_bd_off, u32 *start_bd_idx)
56 {
57 struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl;
58 u32 cur_offset = 0;
59 u32 cur_bd_idx = 0;
60
61 if (buf_off) {
62 while (buf_off >= (cur_offset + bd_tbl->buffer_length)) {
63 cur_offset += bd_tbl->buffer_length;
64 cur_bd_idx++;
65 bd_tbl++;
66 }
67 }
68
69 *start_bd_off = buf_off - cur_offset;
70 *start_bd_idx = cur_bd_idx;
71 }
72
73 /**
74 * bnx2i_setup_write_cmd_bd_info - sets up BD various information
75 * @task: transport layer's cmd struct pointer
76 *
77 * identifies & marks various bd info for scsi command's immediate data,
78 * unsolicited data and first solicited data seq which includes BD start
79 * index & BD buf off. his function takes into account iscsi parameter such
80 * as immediate data and unsolicited data is support on this connection.
81 */
82 static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task)
83 {
84 struct bnx2i_cmd *cmd = task->dd_data;
85 u32 start_bd_offset;
86 u32 start_bd_idx;
87 u32 buffer_offset = 0;
88 u32 cmd_len = cmd->req.total_data_transfer_length;
89
90 /* if ImmediateData is turned off & IntialR2T is turned on,
91 * there will be no immediate or unsolicited data, just return.
92 */
93 if (!iscsi_task_has_unsol_data(task) && !task->imm_count)
94 return;
95
96 /* Immediate data */
97 buffer_offset += task->imm_count;
98 if (task->imm_count == cmd_len)
99 return;
100
101 if (iscsi_task_has_unsol_data(task)) {
102 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
103 &start_bd_offset, &start_bd_idx);
104 cmd->req.ud_buffer_offset = start_bd_offset;
105 cmd->req.ud_start_bd_index = start_bd_idx;
106 buffer_offset += task->unsol_r2t.data_length;
107 }
108
109 if (buffer_offset != cmd_len) {
110 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
111 &start_bd_offset, &start_bd_idx);
112 if ((start_bd_offset > task->conn->session->first_burst) ||
113 (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) {
114 int i = 0;
115
116 iscsi_conn_printk(KERN_ALERT, task->conn,
117 "bnx2i- error, buf offset 0x%x "
118 "bd_valid %d use_sg %d\n",
119 buffer_offset, cmd->io_tbl.bd_valid,
120 scsi_sg_count(cmd->scsi_cmd));
121 for (i = 0; i < cmd->io_tbl.bd_valid; i++)
122 iscsi_conn_printk(KERN_ALERT, task->conn,
123 "bnx2i err, bd[%d]: len %x\n",
124 i, cmd->io_tbl.bd_tbl[i].\
125 buffer_length);
126 }
127 cmd->req.sd_buffer_offset = start_bd_offset;
128 cmd->req.sd_start_bd_index = start_bd_idx;
129 }
130 }
131
132
133
134 /**
135 * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
136 * @hba: adapter instance
137 * @cmd: iscsi cmd struct pointer
138 *
139 * map SG list
140 */
141 static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
142 {
143 struct scsi_cmnd *sc = cmd->scsi_cmd;
144 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
145 struct scatterlist *sg;
146 int byte_count = 0;
147 int bd_count = 0;
148 int sg_count;
149 int sg_len;
150 u64 addr;
151 int i;
152
153 BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD);
154
155 sg_count = scsi_dma_map(sc);
156
157 scsi_for_each_sg(sc, sg, sg_count, i) {
158 sg_len = sg_dma_len(sg);
159 addr = (u64) sg_dma_address(sg);
160 bd[bd_count].buffer_addr_lo = addr & 0xffffffff;
161 bd[bd_count].buffer_addr_hi = addr >> 32;
162 bd[bd_count].buffer_length = sg_len;
163 bd[bd_count].flags = 0;
164 if (bd_count == 0)
165 bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;
166
167 byte_count += sg_len;
168 bd_count++;
169 }
170
171 if (bd_count)
172 bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
173
174 BUG_ON(byte_count != scsi_bufflen(sc));
175 return bd_count;
176 }
177
178 /**
179 * bnx2i_iscsi_map_sg_list - maps SG list
180 * @cmd: iscsi cmd struct pointer
181 *
182 * creates BD list table for the command
183 */
184 static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)
185 {
186 int bd_count;
187
188 bd_count = bnx2i_map_scsi_sg(cmd->conn->hba, cmd);
189 if (!bd_count) {
190 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
191
192 bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;
193 bd[0].buffer_length = bd[0].flags = 0;
194 }
195 cmd->io_tbl.bd_valid = bd_count;
196 }
197
198
199 /**
200 * bnx2i_iscsi_unmap_sg_list - unmaps SG list
201 * @cmd: iscsi cmd struct pointer
202 *
203 * unmap IO buffers and invalidate the BD table
204 */
205 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)
206 {
207 struct scsi_cmnd *sc = cmd->scsi_cmd;
208
209 if (cmd->io_tbl.bd_valid && sc) {
210 scsi_dma_unmap(sc);
211 cmd->io_tbl.bd_valid = 0;
212 }
213 }
214
215 static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)
216 {
217 memset(&cmd->req, 0x00, sizeof(cmd->req));
218 cmd->req.op_code = 0xFF;
219 cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma;
220 cmd->req.bd_list_addr_hi =
221 (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32);
222
223 }
224
225
226 /**
227 * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'
228 * @hba: pointer to adapter instance
229 * @conn: pointer to iscsi connection
230 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
231 *
232 * update iscsi cid table entry with connection pointer. This enables
233 * driver to quickly get hold of connection structure pointer in
234 * completion/interrupt thread using iscsi context ID
235 */
236 static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,
237 struct bnx2i_conn *bnx2i_conn,
238 u32 iscsi_cid)
239 {
240 if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {
241 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
242 "conn bind - entry #%d not free\n", iscsi_cid);
243 return -EBUSY;
244 }
245
246 hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn;
247 return 0;
248 }
249
250
251 /**
252 * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr
253 * @hba: pointer to adapter instance
254 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
255 */
256 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
257 u16 iscsi_cid)
258 {
259 if (!hba->cid_que.conn_cid_tbl) {
260 printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n");
261 return NULL;
262
263 } else if (iscsi_cid >= hba->max_active_conns) {
264 printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid);
265 return NULL;
266 }
267 return hba->cid_que.conn_cid_tbl[iscsi_cid];
268 }
269
270
271 /**
272 * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
273 * @hba: pointer to adapter instance
274 */
275 static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)
276 {
277 int idx;
278
279 if (!hba->cid_que.cid_free_cnt)
280 return -1;
281
282 idx = hba->cid_que.cid_q_cons_idx;
283 hba->cid_que.cid_q_cons_idx++;
284 if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx)
285 hba->cid_que.cid_q_cons_idx = 0;
286
287 hba->cid_que.cid_free_cnt--;
288 return hba->cid_que.cid_que[idx];
289 }
290
291
292 /**
293 * bnx2i_free_iscsi_cid - returns tcp port to free list
294 * @hba: pointer to adapter instance
295 * @iscsi_cid: iscsi context ID to free
296 */
297 static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)
298 {
299 int idx;
300
301 if (iscsi_cid == (u16) -1)
302 return;
303
304 hba->cid_que.cid_free_cnt++;
305
306 idx = hba->cid_que.cid_q_prod_idx;
307 hba->cid_que.cid_que[idx] = iscsi_cid;
308 hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL;
309 hba->cid_que.cid_q_prod_idx++;
310 if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx)
311 hba->cid_que.cid_q_prod_idx = 0;
312 }
313
314
315 /**
316 * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
317 * @hba: pointer to adapter instance
318 *
319 * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
320 * and initialize table attributes
321 */
322 static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)
323 {
324 int mem_size;
325 int i;
326
327 mem_size = hba->max_active_conns * sizeof(u32);
328 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
329
330 hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL);
331 if (!hba->cid_que.cid_que_base)
332 return -ENOMEM;
333
334 mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *);
335 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
336 hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL);
337 if (!hba->cid_que.conn_cid_tbl) {
338 kfree(hba->cid_que.cid_que_base);
339 hba->cid_que.cid_que_base = NULL;
340 return -ENOMEM;
341 }
342
343 hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base;
344 hba->cid_que.cid_q_prod_idx = 0;
345 hba->cid_que.cid_q_cons_idx = 0;
346 hba->cid_que.cid_q_max_idx = hba->max_active_conns;
347 hba->cid_que.cid_free_cnt = hba->max_active_conns;
348
349 for (i = 0; i < hba->max_active_conns; i++) {
350 hba->cid_que.cid_que[i] = i;
351 hba->cid_que.conn_cid_tbl[i] = NULL;
352 }
353 return 0;
354 }
355
356
357 /**
358 * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
359 * @hba: pointer to adapter instance
360 */
361 static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)
362 {
363 kfree(hba->cid_que.cid_que_base);
364 hba->cid_que.cid_que_base = NULL;
365
366 kfree(hba->cid_que.conn_cid_tbl);
367 hba->cid_que.conn_cid_tbl = NULL;
368 }
369
370
371 /**
372 * bnx2i_alloc_ep - allocates ep structure from global pool
373 * @hba: pointer to adapter instance
374 *
375 * routine allocates a free endpoint structure from global pool and
376 * a tcp port to be used for this connection. Global resource lock,
377 * 'bnx2i_resc_lock' is held while accessing shared global data structures
378 */
379 static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)
380 {
381 struct iscsi_endpoint *ep;
382 struct bnx2i_endpoint *bnx2i_ep;
383 u32 ec_div;
384
385 ep = iscsi_create_endpoint(sizeof(*bnx2i_ep));
386 if (!ep) {
387 printk(KERN_ERR "bnx2i: Could not allocate ep\n");
388 return NULL;
389 }
390
391 bnx2i_ep = ep->dd_data;
392 bnx2i_ep->cls_ep = ep;
393 INIT_LIST_HEAD(&bnx2i_ep->link);
394 bnx2i_ep->state = EP_STATE_IDLE;
395 bnx2i_ep->ep_iscsi_cid = (u16) -1;
396 bnx2i_ep->hba = hba;
397 bnx2i_ep->hba_age = hba->age;
398
399 ec_div = event_coal_div;
400 while (ec_div >>= 1)
401 bnx2i_ep->ec_shift += 1;
402
403 hba->ofld_conns_active++;
404 init_waitqueue_head(&bnx2i_ep->ofld_wait);
405 return ep;
406 }
407
408
409 /**
410 * bnx2i_free_ep - free endpoint
411 * @ep: pointer to iscsi endpoint structure
412 */
413 static void bnx2i_free_ep(struct iscsi_endpoint *ep)
414 {
415 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
416 unsigned long flags;
417
418 spin_lock_irqsave(&bnx2i_resc_lock, flags);
419 bnx2i_ep->state = EP_STATE_IDLE;
420 bnx2i_ep->hba->ofld_conns_active--;
421
422 if (bnx2i_ep->ep_iscsi_cid != (u16) -1)
423 bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);
424
425 if (bnx2i_ep->conn) {
426 bnx2i_ep->conn->ep = NULL;
427 bnx2i_ep->conn = NULL;
428 }
429
430 bnx2i_ep->hba = NULL;
431 spin_unlock_irqrestore(&bnx2i_resc_lock, flags);
432 iscsi_destroy_endpoint(ep);
433 }
434
435
436 /**
437 * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
438 * @hba: adapter instance pointer
439 * @session: iscsi session pointer
440 * @cmd: iscsi command structure
441 */
442 static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,
443 struct bnx2i_cmd *cmd)
444 {
445 struct io_bdt *io = &cmd->io_tbl;
446 struct iscsi_bd *bd;
447
448 io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
449 ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),
450 &io->bd_tbl_dma, GFP_KERNEL);
451 if (!io->bd_tbl) {
452 iscsi_session_printk(KERN_ERR, session, "Could not "
453 "allocate bdt.\n");
454 return -ENOMEM;
455 }
456 io->bd_valid = 0;
457 return 0;
458 }
459
460 /**
461 * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
462 * @hba: adapter instance pointer
463 * @session: iscsi session pointer
464 * @cmd: iscsi command structure
465 */
466 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
467 struct iscsi_session *session)
468 {
469 int i;
470
471 for (i = 0; i < session->cmds_max; i++) {
472 struct iscsi_task *task = session->cmds[i];
473 struct bnx2i_cmd *cmd = task->dd_data;
474
475 if (cmd->io_tbl.bd_tbl)
476 dma_free_coherent(&hba->pcidev->dev,
477 ISCSI_MAX_BDS_PER_CMD *
478 sizeof(struct iscsi_bd),
479 cmd->io_tbl.bd_tbl,
480 cmd->io_tbl.bd_tbl_dma);
481 }
482
483 }
484
485
486 /**
487 * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
488 * @hba: adapter instance pointer
489 * @session: iscsi session pointer
490 */
491 static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
492 struct iscsi_session *session)
493 {
494 int i;
495
496 for (i = 0; i < session->cmds_max; i++) {
497 struct iscsi_task *task = session->cmds[i];
498 struct bnx2i_cmd *cmd = task->dd_data;
499
500 task->hdr = &cmd->hdr;
501 task->hdr_max = sizeof(struct iscsi_hdr);
502
503 if (bnx2i_alloc_bdt(hba, session, cmd))
504 goto free_bdts;
505 }
506
507 return 0;
508
509 free_bdts:
510 bnx2i_destroy_cmd_pool(hba, session);
511 return -ENOMEM;
512 }
513
514
515 /**
516 * bnx2i_setup_mp_bdt - allocate BD table resources
517 * @hba: pointer to adapter structure
518 *
519 * Allocate memory for dummy buffer and associated BD
520 * table to be used by middle path (MP) requests
521 */
522 static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
523 {
524 int rc = 0;
525 struct iscsi_bd *mp_bdt;
526 u64 addr;
527
528 hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
529 &hba->mp_bd_dma, GFP_KERNEL);
530 if (!hba->mp_bd_tbl) {
531 printk(KERN_ERR "unable to allocate Middle Path BDT\n");
532 rc = -1;
533 goto out;
534 }
535
536 hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
537 &hba->dummy_buf_dma, GFP_KERNEL);
538 if (!hba->dummy_buffer) {
539 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
540 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
541 hba->mp_bd_tbl, hba->mp_bd_dma);
542 hba->mp_bd_tbl = NULL;
543 rc = -1;
544 goto out;
545 }
546
547 mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
548 addr = (unsigned long) hba->dummy_buf_dma;
549 mp_bdt->buffer_addr_lo = addr & 0xffffffff;
550 mp_bdt->buffer_addr_hi = addr >> 32;
551 mp_bdt->buffer_length = PAGE_SIZE;
552 mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
553 ISCSI_BD_FIRST_IN_BD_CHAIN;
554 out:
555 return rc;
556 }
557
558
559 /**
560 * bnx2i_free_mp_bdt - releases ITT back to free pool
561 * @hba: pointer to adapter instance
562 *
563 * free MP dummy buffer and associated BD table
564 */
565 static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
566 {
567 if (hba->mp_bd_tbl) {
568 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
569 hba->mp_bd_tbl, hba->mp_bd_dma);
570 hba->mp_bd_tbl = NULL;
571 }
572 if (hba->dummy_buffer) {
573 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
574 hba->dummy_buffer, hba->dummy_buf_dma);
575 hba->dummy_buffer = NULL;
576 }
577 return;
578 }
579
580 /**
581 * bnx2i_drop_session - notifies iscsid of connection error.
582 * @hba: adapter instance pointer
583 * @session: iscsi session pointer
584 *
585 * This notifies iscsid that there is a error, so it can initiate
586 * recovery.
587 *
588 * This relies on caller using the iscsi class iterator so the object
589 * is refcounted and does not disapper from under us.
590 */
591 void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
592 {
593 iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
594 }
595
596 /**
597 * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
598 * @hba: pointer to adapter instance
599 * @ep: pointer to endpoint (transport indentifier) structure
600 *
601 * EP destroy queue manager
602 */
603 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
604 struct bnx2i_endpoint *ep)
605 {
606 write_lock_bh(&hba->ep_rdwr_lock);
607 list_add_tail(&ep->link, &hba->ep_destroy_list);
608 write_unlock_bh(&hba->ep_rdwr_lock);
609 return 0;
610 }
611
612 /**
613 * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
614 *
615 * @hba: pointer to adapter instance
616 * @ep: pointer to endpoint (transport indentifier) structure
617 *
618 * EP destroy queue manager
619 */
620 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
621 struct bnx2i_endpoint *ep)
622 {
623 write_lock_bh(&hba->ep_rdwr_lock);
624 list_del_init(&ep->link);
625 write_unlock_bh(&hba->ep_rdwr_lock);
626
627 return 0;
628 }
629
630 /**
631 * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
632 * @hba: pointer to adapter instance
633 * @ep: pointer to endpoint (transport indentifier) structure
634 *
635 * pending conn offload completion queue manager
636 */
637 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
638 struct bnx2i_endpoint *ep)
639 {
640 write_lock_bh(&hba->ep_rdwr_lock);
641 list_add_tail(&ep->link, &hba->ep_ofld_list);
642 write_unlock_bh(&hba->ep_rdwr_lock);
643 return 0;
644 }
645
646 /**
647 * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
648 * @hba: pointer to adapter instance
649 * @ep: pointer to endpoint (transport indentifier) structure
650 *
651 * pending conn offload completion queue manager
652 */
653 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
654 struct bnx2i_endpoint *ep)
655 {
656 write_lock_bh(&hba->ep_rdwr_lock);
657 list_del_init(&ep->link);
658 write_unlock_bh(&hba->ep_rdwr_lock);
659 return 0;
660 }
661
662
663 /**
664 * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
665 *
666 * @hba: pointer to adapter instance
667 * @iscsi_cid: iscsi context ID to find
668 *
669 */
670 struct bnx2i_endpoint *
671 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
672 {
673 struct list_head *list;
674 struct list_head *tmp;
675 struct bnx2i_endpoint *ep;
676
677 read_lock_bh(&hba->ep_rdwr_lock);
678 list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
679 ep = (struct bnx2i_endpoint *)list;
680
681 if (ep->ep_iscsi_cid == iscsi_cid)
682 break;
683 ep = NULL;
684 }
685 read_unlock_bh(&hba->ep_rdwr_lock);
686
687 if (!ep)
688 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
689 return ep;
690 }
691
692 /**
693 * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
694 * @hba: pointer to adapter instance
695 * @iscsi_cid: iscsi context ID to find
696 *
697 */
698 struct bnx2i_endpoint *
699 bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
700 {
701 struct list_head *list;
702 struct list_head *tmp;
703 struct bnx2i_endpoint *ep;
704
705 read_lock_bh(&hba->ep_rdwr_lock);
706 list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
707 ep = (struct bnx2i_endpoint *)list;
708
709 if (ep->ep_iscsi_cid == iscsi_cid)
710 break;
711 ep = NULL;
712 }
713 read_unlock_bh(&hba->ep_rdwr_lock);
714
715 if (!ep)
716 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
717
718 return ep;
719 }
720
721 /**
722 * bnx2i_ep_active_list_add - add an entry to ep active list
723 * @hba: pointer to adapter instance
724 * @ep: pointer to endpoint (transport indentifier) structure
725 *
726 * current active conn queue manager
727 */
728 static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba,
729 struct bnx2i_endpoint *ep)
730 {
731 write_lock_bh(&hba->ep_rdwr_lock);
732 list_add_tail(&ep->link, &hba->ep_active_list);
733 write_unlock_bh(&hba->ep_rdwr_lock);
734 }
735
736
737 /**
738 * bnx2i_ep_active_list_del - deletes an entry to ep active list
739 * @hba: pointer to adapter instance
740 * @ep: pointer to endpoint (transport indentifier) structure
741 *
742 * current active conn queue manager
743 */
744 static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba,
745 struct bnx2i_endpoint *ep)
746 {
747 write_lock_bh(&hba->ep_rdwr_lock);
748 list_del_init(&ep->link);
749 write_unlock_bh(&hba->ep_rdwr_lock);
750 }
751
752
753 /**
754 * bnx2i_setup_host_queue_size - assigns shost->can_queue param
755 * @hba: pointer to adapter instance
756 * @shost: scsi host pointer
757 *
758 * Initializes 'can_queue' parameter based on how many outstanding commands
759 * the device can handle. Each device 5708/5709/57710 has different
760 * capabilities
761 */
762 static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
763 struct Scsi_Host *shost)
764 {
765 if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
766 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
767 else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
768 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
769 else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
770 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
771 else
772 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
773 }
774
775
776 /**
777 * bnx2i_alloc_hba - allocate and init adapter instance
778 * @cnic: cnic device pointer
779 *
780 * allocate & initialize adapter structure and call other
781 * support routines to do per adapter initialization
782 */
783 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
784 {
785 struct Scsi_Host *shost;
786 struct bnx2i_hba *hba;
787
788 shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
789 if (!shost)
790 return NULL;
791 shost->dma_boundary = cnic->pcidev->dma_mask;
792 shost->transportt = bnx2i_scsi_xport_template;
793 shost->max_id = ISCSI_MAX_CONNS_PER_HBA;
794 shost->max_channel = 0;
795 shost->max_lun = 512;
796 shost->max_cmd_len = 16;
797
798 hba = iscsi_host_priv(shost);
799 hba->shost = shost;
800 hba->netdev = cnic->netdev;
801 /* Get PCI related information and update hba struct members */
802 hba->pcidev = cnic->pcidev;
803 pci_dev_get(hba->pcidev);
804 hba->pci_did = hba->pcidev->device;
805 hba->pci_vid = hba->pcidev->vendor;
806 hba->pci_sdid = hba->pcidev->subsystem_device;
807 hba->pci_svid = hba->pcidev->subsystem_vendor;
808 hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
809 hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
810
811 bnx2i_identify_device(hba);
812 bnx2i_setup_host_queue_size(hba, shost);
813
814 hba->reg_base = pci_resource_start(hba->pcidev, 0);
815 if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
816 hba->regview = pci_iomap(hba->pcidev, 0, BNX2_MQ_CONFIG2);
817 if (!hba->regview)
818 goto ioreg_map_err;
819 } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
820 hba->regview = pci_iomap(hba->pcidev, 0, 4096);
821 if (!hba->regview)
822 goto ioreg_map_err;
823 }
824
825 if (bnx2i_setup_mp_bdt(hba))
826 goto mp_bdt_mem_err;
827
828 INIT_LIST_HEAD(&hba->ep_ofld_list);
829 INIT_LIST_HEAD(&hba->ep_active_list);
830 INIT_LIST_HEAD(&hba->ep_destroy_list);
831 rwlock_init(&hba->ep_rdwr_lock);
832
833 hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
834
835 /* different values for 5708/5709/57710 */
836 hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
837
838 if (bnx2i_setup_free_cid_que(hba))
839 goto cid_que_err;
840
841 /* SQ/RQ/CQ size can be changed via sysfx interface */
842 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
843 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
844 hba->max_sqes = sq_size;
845 else
846 hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
847 } else { /* 5706/5708/5709 */
848 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
849 hba->max_sqes = sq_size;
850 else
851 hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
852 }
853
854 hba->max_rqes = rq_size;
855 hba->max_cqes = hba->max_sqes + rq_size;
856 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
857 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
858 hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
859 } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
860 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
861
862 hba->num_ccell = hba->max_sqes / 2;
863
864 spin_lock_init(&hba->lock);
865 mutex_init(&hba->net_dev_lock);
866 init_waitqueue_head(&hba->eh_wait);
867 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
868 hba->hba_shutdown_tmo = 30 * HZ;
869 hba->conn_teardown_tmo = 20 * HZ;
870 hba->conn_ctx_destroy_tmo = 6 * HZ;
871 } else { /* 5706/5708/5709 */
872 hba->hba_shutdown_tmo = 20 * HZ;
873 hba->conn_teardown_tmo = 10 * HZ;
874 hba->conn_ctx_destroy_tmo = 2 * HZ;
875 }
876
877 #ifdef CONFIG_32BIT
878 spin_lock_init(&hba->stat_lock);
879 #endif
880 memset(&hba->stats, 0, sizeof(struct iscsi_stats_info));
881
882 if (iscsi_host_add(shost, &hba->pcidev->dev))
883 goto free_dump_mem;
884 return hba;
885
886 free_dump_mem:
887 bnx2i_release_free_cid_que(hba);
888 cid_que_err:
889 bnx2i_free_mp_bdt(hba);
890 mp_bdt_mem_err:
891 if (hba->regview) {
892 pci_iounmap(hba->pcidev, hba->regview);
893 hba->regview = NULL;
894 }
895 ioreg_map_err:
896 pci_dev_put(hba->pcidev);
897 scsi_host_put(shost);
898 return NULL;
899 }
900
901 /**
902 * bnx2i_free_hba- releases hba structure and resources held by the adapter
903 * @hba: pointer to adapter instance
904 *
905 * free adapter structure and call various cleanup routines.
906 */
907 void bnx2i_free_hba(struct bnx2i_hba *hba)
908 {
909 struct Scsi_Host *shost = hba->shost;
910
911 iscsi_host_remove(shost);
912 INIT_LIST_HEAD(&hba->ep_ofld_list);
913 INIT_LIST_HEAD(&hba->ep_active_list);
914 INIT_LIST_HEAD(&hba->ep_destroy_list);
915 pci_dev_put(hba->pcidev);
916
917 if (hba->regview) {
918 pci_iounmap(hba->pcidev, hba->regview);
919 hba->regview = NULL;
920 }
921 bnx2i_free_mp_bdt(hba);
922 bnx2i_release_free_cid_que(hba);
923 iscsi_host_free(shost);
924 }
925
926 /**
927 * bnx2i_conn_free_login_resources - free DMA resources used for login process
928 * @hba: pointer to adapter instance
929 * @bnx2i_conn: iscsi connection pointer
930 *
931 * Login related resources, mostly BDT & payload DMA memory is freed
932 */
933 static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
934 struct bnx2i_conn *bnx2i_conn)
935 {
936 if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
937 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
938 bnx2i_conn->gen_pdu.resp_bd_tbl,
939 bnx2i_conn->gen_pdu.resp_bd_dma);
940 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
941 }
942
943 if (bnx2i_conn->gen_pdu.req_bd_tbl) {
944 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
945 bnx2i_conn->gen_pdu.req_bd_tbl,
946 bnx2i_conn->gen_pdu.req_bd_dma);
947 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
948 }
949
950 if (bnx2i_conn->gen_pdu.resp_buf) {
951 dma_free_coherent(&hba->pcidev->dev,
952 ISCSI_DEF_MAX_RECV_SEG_LEN,
953 bnx2i_conn->gen_pdu.resp_buf,
954 bnx2i_conn->gen_pdu.resp_dma_addr);
955 bnx2i_conn->gen_pdu.resp_buf = NULL;
956 }
957
958 if (bnx2i_conn->gen_pdu.req_buf) {
959 dma_free_coherent(&hba->pcidev->dev,
960 ISCSI_DEF_MAX_RECV_SEG_LEN,
961 bnx2i_conn->gen_pdu.req_buf,
962 bnx2i_conn->gen_pdu.req_dma_addr);
963 bnx2i_conn->gen_pdu.req_buf = NULL;
964 }
965 }
966
967 /**
968 * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
969 * @hba: pointer to adapter instance
970 * @bnx2i_conn: iscsi connection pointer
971 *
972 * Mgmt task DNA resources are allocated in this routine.
973 */
974 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
975 struct bnx2i_conn *bnx2i_conn)
976 {
977 /* Allocate memory for login request/response buffers */
978 bnx2i_conn->gen_pdu.req_buf =
979 dma_alloc_coherent(&hba->pcidev->dev,
980 ISCSI_DEF_MAX_RECV_SEG_LEN,
981 &bnx2i_conn->gen_pdu.req_dma_addr,
982 GFP_KERNEL);
983 if (bnx2i_conn->gen_pdu.req_buf == NULL)
984 goto login_req_buf_failure;
985
986 bnx2i_conn->gen_pdu.req_buf_size = 0;
987 bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
988
989 bnx2i_conn->gen_pdu.resp_buf =
990 dma_alloc_coherent(&hba->pcidev->dev,
991 ISCSI_DEF_MAX_RECV_SEG_LEN,
992 &bnx2i_conn->gen_pdu.resp_dma_addr,
993 GFP_KERNEL);
994 if (bnx2i_conn->gen_pdu.resp_buf == NULL)
995 goto login_resp_buf_failure;
996
997 bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
998 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
999
1000 bnx2i_conn->gen_pdu.req_bd_tbl =
1001 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
1002 &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
1003 if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
1004 goto login_req_bd_tbl_failure;
1005
1006 bnx2i_conn->gen_pdu.resp_bd_tbl =
1007 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
1008 &bnx2i_conn->gen_pdu.resp_bd_dma,
1009 GFP_KERNEL);
1010 if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
1011 goto login_resp_bd_tbl_failure;
1012
1013 return 0;
1014
1015 login_resp_bd_tbl_failure:
1016 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
1017 bnx2i_conn->gen_pdu.req_bd_tbl,
1018 bnx2i_conn->gen_pdu.req_bd_dma);
1019 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
1020
1021 login_req_bd_tbl_failure:
1022 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1023 bnx2i_conn->gen_pdu.resp_buf,
1024 bnx2i_conn->gen_pdu.resp_dma_addr);
1025 bnx2i_conn->gen_pdu.resp_buf = NULL;
1026 login_resp_buf_failure:
1027 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1028 bnx2i_conn->gen_pdu.req_buf,
1029 bnx2i_conn->gen_pdu.req_dma_addr);
1030 bnx2i_conn->gen_pdu.req_buf = NULL;
1031 login_req_buf_failure:
1032 iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
1033 "login resource alloc failed!!\n");
1034 return -ENOMEM;
1035
1036 }
1037
1038
1039 /**
1040 * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
1041 * @bnx2i_conn: iscsi connection pointer
1042 *
1043 * Allocates buffers and BD tables before shipping requests to cnic
1044 * for PDUs prepared by 'iscsid' daemon
1045 */
1046 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
1047 {
1048 struct iscsi_bd *bd_tbl;
1049
1050 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
1051
1052 bd_tbl->buffer_addr_hi =
1053 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
1054 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
1055 bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
1056 bnx2i_conn->gen_pdu.req_buf;
1057 bd_tbl->reserved0 = 0;
1058 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1059 ISCSI_BD_FIRST_IN_BD_CHAIN;
1060
1061 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1062 bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1063 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1064 bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1065 bd_tbl->reserved0 = 0;
1066 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1067 ISCSI_BD_FIRST_IN_BD_CHAIN;
1068 }
1069
1070
1071 /**
1072 * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1073 * @task: transport layer task pointer
1074 *
1075 * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1076 * Nop-out and Logout requests flow through this path.
1077 */
1078 static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1079 {
1080 struct bnx2i_cmd *cmd = task->dd_data;
1081 struct bnx2i_conn *bnx2i_conn = cmd->conn;
1082 int rc = 0;
1083 char *buf;
1084 int data_len;
1085
1086 bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1087 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1088 case ISCSI_OP_LOGIN:
1089 bnx2i_send_iscsi_login(bnx2i_conn, task);
1090 break;
1091 case ISCSI_OP_NOOP_OUT:
1092 data_len = bnx2i_conn->gen_pdu.req_buf_size;
1093 buf = bnx2i_conn->gen_pdu.req_buf;
1094 if (data_len)
1095 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1096 buf, data_len, 1);
1097 else
1098 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1099 NULL, 0, 1);
1100 break;
1101 case ISCSI_OP_LOGOUT:
1102 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1103 break;
1104 case ISCSI_OP_SCSI_TMFUNC:
1105 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1106 break;
1107 case ISCSI_OP_TEXT:
1108 rc = bnx2i_send_iscsi_text(bnx2i_conn, task);
1109 break;
1110 default:
1111 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1112 "send_gen: unsupported op 0x%x\n",
1113 task->hdr->opcode);
1114 }
1115 return rc;
1116 }
1117
1118
1119 /**********************************************************************
1120 * SCSI-ML Interface
1121 **********************************************************************/
1122
1123 /**
1124 * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1125 * @sc: SCSI-ML command pointer
1126 * @cmd: iscsi cmd pointer
1127 */
1128 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1129 {
1130 u32 dword;
1131 int lpcnt;
1132 u8 *srcp;
1133 u32 *dstp;
1134 u32 scsi_lun[2];
1135
1136 int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1137 cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1138 cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1139
1140 lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1141 srcp = (u8 *) sc->cmnd;
1142 dstp = (u32 *) cmd->req.cdb;
1143 while (lpcnt--) {
1144 memcpy(&dword, (const void *) srcp, 4);
1145 *dstp = cpu_to_be32(dword);
1146 srcp += 4;
1147 dstp++;
1148 }
1149 if (sc->cmd_len & 0x3) {
1150 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1151 *dstp = cpu_to_be32(dword);
1152 }
1153 }
1154
1155 static void bnx2i_cleanup_task(struct iscsi_task *task)
1156 {
1157 struct iscsi_conn *conn = task->conn;
1158 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1159 struct bnx2i_hba *hba = bnx2i_conn->hba;
1160
1161 /*
1162 * mgmt task or cmd was never sent to us to transmit.
1163 */
1164 if (!task->sc || task->state == ISCSI_TASK_PENDING)
1165 return;
1166 /*
1167 * need to clean-up task context to claim dma buffers
1168 */
1169 if (task->state == ISCSI_TASK_ABRT_TMF) {
1170 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1171
1172 spin_unlock_bh(&conn->session->lock);
1173 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1174 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1175 spin_lock_bh(&conn->session->lock);
1176 }
1177 bnx2i_iscsi_unmap_sg_list(task->dd_data);
1178 }
1179
1180 /**
1181 * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1182 * @conn: transport layer conn structure pointer
1183 * @task: transport layer command structure pointer
1184 */
1185 static int
1186 bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1187 {
1188 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1189 struct bnx2i_hba *hba = bnx2i_conn->hba;
1190 struct bnx2i_cmd *cmd = task->dd_data;
1191
1192 memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1193
1194 bnx2i_setup_cmd_wqe_template(cmd);
1195 bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1196
1197 /* Tx PDU/data length count */
1198 ADD_STATS_64(hba, tx_pdus, 1);
1199 ADD_STATS_64(hba, tx_bytes, task->data_count);
1200
1201 if (task->data_count) {
1202 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1203 task->data_count);
1204 bnx2i_conn->gen_pdu.req_wr_ptr =
1205 bnx2i_conn->gen_pdu.req_buf + task->data_count;
1206 }
1207 cmd->conn = conn->dd_data;
1208 cmd->scsi_cmd = NULL;
1209 return bnx2i_iscsi_send_generic_request(task);
1210 }
1211
1212 /**
1213 * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1214 * @task: transport layer command structure pointer
1215 *
1216 * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1217 */
1218 static int bnx2i_task_xmit(struct iscsi_task *task)
1219 {
1220 struct iscsi_conn *conn = task->conn;
1221 struct iscsi_session *session = conn->session;
1222 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1223 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1224 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1225 struct scsi_cmnd *sc = task->sc;
1226 struct bnx2i_cmd *cmd = task->dd_data;
1227 struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
1228
1229 if (atomic_read(&bnx2i_conn->ep->num_active_cmds) + 1 >
1230 hba->max_sqes)
1231 return -ENOMEM;
1232
1233 /*
1234 * If there is no scsi_cmnd this must be a mgmt task
1235 */
1236 if (!sc)
1237 return bnx2i_mtask_xmit(conn, task);
1238
1239 bnx2i_setup_cmd_wqe_template(cmd);
1240 cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1241 cmd->conn = bnx2i_conn;
1242 cmd->scsi_cmd = sc;
1243 cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1244 cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1245
1246 bnx2i_iscsi_map_sg_list(cmd);
1247 bnx2i_cpy_scsi_cdb(sc, cmd);
1248
1249 cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1250 if (sc->sc_data_direction == DMA_TO_DEVICE) {
1251 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1252 cmd->req.itt = task->itt |
1253 (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1254 bnx2i_setup_write_cmd_bd_info(task);
1255 } else {
1256 if (scsi_bufflen(sc))
1257 cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1258 cmd->req.itt = task->itt |
1259 (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1260 }
1261
1262 cmd->req.num_bds = cmd->io_tbl.bd_valid;
1263 if (!cmd->io_tbl.bd_valid) {
1264 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1265 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1266 cmd->req.num_bds = 1;
1267 }
1268
1269 bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1270 return 0;
1271 }
1272
1273 /**
1274 * bnx2i_session_create - create a new iscsi session
1275 * @cmds_max: max commands supported
1276 * @qdepth: scsi queue depth to support
1277 * @initial_cmdsn: initial iscsi CMDSN to be used for this session
1278 *
1279 * Creates a new iSCSI session instance on given device.
1280 */
1281 static struct iscsi_cls_session *
1282 bnx2i_session_create(struct iscsi_endpoint *ep,
1283 uint16_t cmds_max, uint16_t qdepth,
1284 uint32_t initial_cmdsn)
1285 {
1286 struct Scsi_Host *shost;
1287 struct iscsi_cls_session *cls_session;
1288 struct bnx2i_hba *hba;
1289 struct bnx2i_endpoint *bnx2i_ep;
1290
1291 if (!ep) {
1292 printk(KERN_ERR "bnx2i: missing ep.\n");
1293 return NULL;
1294 }
1295
1296 bnx2i_ep = ep->dd_data;
1297 shost = bnx2i_ep->hba->shost;
1298 hba = iscsi_host_priv(shost);
1299 if (bnx2i_adapter_ready(hba))
1300 return NULL;
1301
1302 /*
1303 * user can override hw limit as long as it is within
1304 * the min/max.
1305 */
1306 if (cmds_max > hba->max_sqes)
1307 cmds_max = hba->max_sqes;
1308 else if (cmds_max < BNX2I_SQ_WQES_MIN)
1309 cmds_max = BNX2I_SQ_WQES_MIN;
1310
1311 cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1312 cmds_max, 0, sizeof(struct bnx2i_cmd),
1313 initial_cmdsn, ISCSI_MAX_TARGET);
1314 if (!cls_session)
1315 return NULL;
1316
1317 if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1318 goto session_teardown;
1319 return cls_session;
1320
1321 session_teardown:
1322 iscsi_session_teardown(cls_session);
1323 return NULL;
1324 }
1325
1326
1327 /**
1328 * bnx2i_session_destroy - destroys iscsi session
1329 * @cls_session: pointer to iscsi cls session
1330 *
1331 * Destroys previously created iSCSI session instance and releases
1332 * all resources held by it
1333 */
1334 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1335 {
1336 struct iscsi_session *session = cls_session->dd_data;
1337 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1338 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1339
1340 bnx2i_destroy_cmd_pool(hba, session);
1341 iscsi_session_teardown(cls_session);
1342 }
1343
1344
1345 /**
1346 * bnx2i_conn_create - create iscsi connection instance
1347 * @cls_session: pointer to iscsi cls session
1348 * @cid: iscsi cid as per rfc (not NX2's CID terminology)
1349 *
1350 * Creates a new iSCSI connection instance for a given session
1351 */
1352 static struct iscsi_cls_conn *
1353 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1354 {
1355 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1356 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1357 struct bnx2i_conn *bnx2i_conn;
1358 struct iscsi_cls_conn *cls_conn;
1359 struct iscsi_conn *conn;
1360
1361 cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1362 cid);
1363 if (!cls_conn)
1364 return NULL;
1365 conn = cls_conn->dd_data;
1366
1367 bnx2i_conn = conn->dd_data;
1368 bnx2i_conn->cls_conn = cls_conn;
1369 bnx2i_conn->hba = hba;
1370
1371 atomic_set(&bnx2i_conn->work_cnt, 0);
1372
1373 /* 'ep' ptr will be assigned in bind() call */
1374 bnx2i_conn->ep = NULL;
1375 init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1376
1377 if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1378 iscsi_conn_printk(KERN_ALERT, conn,
1379 "conn_new: login resc alloc failed!!\n");
1380 goto free_conn;
1381 }
1382
1383 return cls_conn;
1384
1385 free_conn:
1386 iscsi_conn_teardown(cls_conn);
1387 return NULL;
1388 }
1389
1390 /**
1391 * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1392 * @cls_session: pointer to iscsi cls session
1393 * @cls_conn: pointer to iscsi cls conn
1394 * @transport_fd: 64-bit EP handle
1395 * @is_leading: leading connection on this session?
1396 *
1397 * Binds together iSCSI session instance, iSCSI connection instance
1398 * and the TCP connection. This routine returns error code if
1399 * TCP connection does not belong on the device iSCSI sess/conn
1400 * is bound
1401 */
1402 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1403 struct iscsi_cls_conn *cls_conn,
1404 uint64_t transport_fd, int is_leading)
1405 {
1406 struct iscsi_conn *conn = cls_conn->dd_data;
1407 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1408 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1409 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1410 struct bnx2i_endpoint *bnx2i_ep;
1411 struct iscsi_endpoint *ep;
1412 int ret_code;
1413
1414 ep = iscsi_lookup_endpoint(transport_fd);
1415 if (!ep)
1416 return -EINVAL;
1417 /*
1418 * Forcefully terminate all in progress connection recovery at the
1419 * earliest, either in bind(), send_pdu(LOGIN), or conn_start()
1420 */
1421 if (bnx2i_adapter_ready(hba))
1422 return -EIO;
1423
1424 bnx2i_ep = ep->dd_data;
1425 if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1426 (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1427 /* Peer disconnect via' FIN or RST */
1428 return -EINVAL;
1429
1430 if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1431 return -EINVAL;
1432
1433 if (bnx2i_ep->hba != hba) {
1434 /* Error - TCP connection does not belong to this device
1435 */
1436 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1437 "conn bind, ep=0x%p (%s) does not",
1438 bnx2i_ep, bnx2i_ep->hba->netdev->name);
1439 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1440 "belong to hba (%s)\n",
1441 hba->netdev->name);
1442 return -EEXIST;
1443 }
1444 bnx2i_ep->conn = bnx2i_conn;
1445 bnx2i_conn->ep = bnx2i_ep;
1446 bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1447 bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1448
1449 ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1450 bnx2i_ep->ep_iscsi_cid);
1451
1452 /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1453 * driver needs to explicitly replenish RQ index during setup.
1454 */
1455 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1456 bnx2i_put_rq_buf(bnx2i_conn, 0);
1457
1458 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1459 return ret_code;
1460 }
1461
1462
1463 /**
1464 * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1465 * @cls_conn: pointer to iscsi cls conn
1466 *
1467 * Destroy an iSCSI connection instance and release memory resources held by
1468 * this connection
1469 */
1470 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1471 {
1472 struct iscsi_conn *conn = cls_conn->dd_data;
1473 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1474 struct Scsi_Host *shost;
1475 struct bnx2i_hba *hba;
1476 struct bnx2i_work *work, *tmp;
1477 unsigned cpu = 0;
1478 struct bnx2i_percpu_s *p;
1479
1480 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1481 hba = iscsi_host_priv(shost);
1482
1483 bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1484
1485 if (atomic_read(&bnx2i_conn->work_cnt)) {
1486 for_each_online_cpu(cpu) {
1487 p = &per_cpu(bnx2i_percpu, cpu);
1488 spin_lock_bh(&p->p_work_lock);
1489 list_for_each_entry_safe(work, tmp,
1490 &p->work_list, list) {
1491 if (work->session == conn->session &&
1492 work->bnx2i_conn == bnx2i_conn) {
1493 list_del_init(&work->list);
1494 kfree(work);
1495 if (!atomic_dec_and_test(
1496 &bnx2i_conn->work_cnt))
1497 break;
1498 }
1499 }
1500 spin_unlock_bh(&p->p_work_lock);
1501 }
1502 }
1503
1504 iscsi_conn_teardown(cls_conn);
1505 }
1506
1507
1508 /**
1509 * bnx2i_ep_get_param - return iscsi ep parameter to caller
1510 * @ep: pointer to iscsi endpoint
1511 * @param: parameter type identifier
1512 * @buf: buffer pointer
1513 *
1514 * returns iSCSI ep parameters
1515 */
1516 static int bnx2i_ep_get_param(struct iscsi_endpoint *ep,
1517 enum iscsi_param param, char *buf)
1518 {
1519 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
1520 struct bnx2i_hba *hba = bnx2i_ep->hba;
1521 int len = -ENOTCONN;
1522
1523 if (!hba)
1524 return -ENOTCONN;
1525
1526 switch (param) {
1527 case ISCSI_PARAM_CONN_PORT:
1528 mutex_lock(&hba->net_dev_lock);
1529 if (bnx2i_ep->cm_sk)
1530 len = sprintf(buf, "%hu\n", bnx2i_ep->cm_sk->dst_port);
1531 mutex_unlock(&hba->net_dev_lock);
1532 break;
1533 case ISCSI_PARAM_CONN_ADDRESS:
1534 mutex_lock(&hba->net_dev_lock);
1535 if (bnx2i_ep->cm_sk)
1536 len = sprintf(buf, "%pI4\n", &bnx2i_ep->cm_sk->dst_ip);
1537 mutex_unlock(&hba->net_dev_lock);
1538 break;
1539 default:
1540 return -ENOSYS;
1541 }
1542
1543 return len;
1544 }
1545
1546 /**
1547 * bnx2i_host_get_param - returns host (adapter) related parameters
1548 * @shost: scsi host pointer
1549 * @param: parameter type identifier
1550 * @buf: buffer pointer
1551 */
1552 static int bnx2i_host_get_param(struct Scsi_Host *shost,
1553 enum iscsi_host_param param, char *buf)
1554 {
1555 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1556 int len = 0;
1557
1558 switch (param) {
1559 case ISCSI_HOST_PARAM_HWADDRESS:
1560 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1561 break;
1562 case ISCSI_HOST_PARAM_NETDEV_NAME:
1563 len = sprintf(buf, "%s\n", hba->netdev->name);
1564 break;
1565 case ISCSI_HOST_PARAM_IPADDRESS: {
1566 struct list_head *active_list = &hba->ep_active_list;
1567
1568 read_lock_bh(&hba->ep_rdwr_lock);
1569 if (!list_empty(&hba->ep_active_list)) {
1570 struct bnx2i_endpoint *bnx2i_ep;
1571 struct cnic_sock *csk;
1572
1573 bnx2i_ep = list_first_entry(active_list,
1574 struct bnx2i_endpoint,
1575 link);
1576 csk = bnx2i_ep->cm_sk;
1577 if (test_bit(SK_F_IPV6, &csk->flags))
1578 len = sprintf(buf, "%pI6\n", csk->src_ip);
1579 else
1580 len = sprintf(buf, "%pI4\n", csk->src_ip);
1581 }
1582 read_unlock_bh(&hba->ep_rdwr_lock);
1583 break;
1584 }
1585 default:
1586 return iscsi_host_get_param(shost, param, buf);
1587 }
1588 return len;
1589 }
1590
1591 /**
1592 * bnx2i_conn_start - completes iscsi connection migration to FFP
1593 * @cls_conn: pointer to iscsi cls conn
1594 *
1595 * last call in FFP migration to handover iscsi conn to the driver
1596 */
1597 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1598 {
1599 struct iscsi_conn *conn = cls_conn->dd_data;
1600 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1601
1602 bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1603 bnx2i_update_iscsi_conn(conn);
1604
1605 /*
1606 * this should normally not sleep for a long time so it should
1607 * not disrupt the caller.
1608 */
1609 bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1610 bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1611 bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
1612 add_timer(&bnx2i_conn->ep->ofld_timer);
1613 /* update iSCSI context for this conn, wait for CNIC to complete */
1614 wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1615 bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1616
1617 if (signal_pending(current))
1618 flush_signals(current);
1619 del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1620
1621 iscsi_conn_start(cls_conn);
1622 return 0;
1623 }
1624
1625
1626 /**
1627 * bnx2i_conn_get_stats - returns iSCSI stats
1628 * @cls_conn: pointer to iscsi cls conn
1629 * @stats: pointer to iscsi statistic struct
1630 */
1631 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1632 struct iscsi_stats *stats)
1633 {
1634 struct iscsi_conn *conn = cls_conn->dd_data;
1635
1636 stats->txdata_octets = conn->txdata_octets;
1637 stats->rxdata_octets = conn->rxdata_octets;
1638 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1639 stats->dataout_pdus = conn->dataout_pdus_cnt;
1640 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1641 stats->datain_pdus = conn->datain_pdus_cnt;
1642 stats->r2t_pdus = conn->r2t_pdus_cnt;
1643 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1644 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1645 stats->custom_length = 3;
1646 strcpy(stats->custom[2].desc, "eh_abort_cnt");
1647 stats->custom[2].value = conn->eh_abort_cnt;
1648 stats->digest_err = 0;
1649 stats->timeout_err = 0;
1650 stats->custom_length = 0;
1651 }
1652
1653
1654 /**
1655 * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1656 * @dst_addr: target IP address
1657 *
1658 * check if route resolves to BNX2 device
1659 */
1660 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1661 {
1662 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1663 struct bnx2i_hba *hba;
1664 struct cnic_dev *cnic = NULL;
1665
1666 hba = get_adapter_list_head();
1667 if (hba && hba->cnic)
1668 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1669 if (!cnic) {
1670 printk(KERN_ALERT "bnx2i: no route,"
1671 "can't connect using cnic\n");
1672 goto no_nx2_route;
1673 }
1674 hba = bnx2i_find_hba_for_cnic(cnic);
1675 if (!hba)
1676 goto no_nx2_route;
1677
1678 if (bnx2i_adapter_ready(hba)) {
1679 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1680 goto no_nx2_route;
1681 }
1682 if (hba->netdev->mtu > hba->mtu_supported) {
1683 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1684 hba->netdev->name, hba->netdev->mtu);
1685 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1686 hba->mtu_supported);
1687 goto no_nx2_route;
1688 }
1689 return hba;
1690 no_nx2_route:
1691 return NULL;
1692 }
1693
1694
1695 /**
1696 * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1697 * @hba: pointer to adapter instance
1698 * @ep: endpoint (transport indentifier) structure
1699 *
1700 * destroys cm_sock structure and on chip iscsi context
1701 */
1702 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1703 struct bnx2i_endpoint *ep)
1704 {
1705 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk)
1706 hba->cnic->cm_destroy(ep->cm_sk);
1707
1708 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1709 ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1710 if (ep->conn && ep->conn->cls_conn &&
1711 ep->conn->cls_conn->dd_data) {
1712 struct iscsi_conn *conn = ep->conn->cls_conn->dd_data;
1713
1714 /* Must suspend all rx queue activity for this ep */
1715 set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
1716 }
1717 /* CONN_DISCONNECT timeout may or may not be an issue depending
1718 * on what transcribed in TCP layer, different targets behave
1719 * differently
1720 */
1721 printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, "
1722 "please submit GRC Dump, NW/PCIe trace, "
1723 "driver msgs to developers for analysis\n",
1724 hba->netdev->name);
1725 }
1726
1727 ep->state = EP_STATE_CLEANUP_START;
1728 init_timer(&ep->ofld_timer);
1729 ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies;
1730 ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1731 ep->ofld_timer.data = (unsigned long) ep;
1732 add_timer(&ep->ofld_timer);
1733
1734 bnx2i_ep_destroy_list_add(hba, ep);
1735
1736 /* destroy iSCSI context, wait for it to complete */
1737 if (bnx2i_send_conn_destroy(hba, ep))
1738 ep->state = EP_STATE_CLEANUP_CMPL;
1739
1740 wait_event_interruptible(ep->ofld_wait,
1741 (ep->state != EP_STATE_CLEANUP_START));
1742
1743 if (signal_pending(current))
1744 flush_signals(current);
1745 del_timer_sync(&ep->ofld_timer);
1746
1747 bnx2i_ep_destroy_list_del(hba, ep);
1748
1749 if (ep->state != EP_STATE_CLEANUP_CMPL)
1750 /* should never happen */
1751 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1752
1753 return 0;
1754 }
1755
1756
1757 /**
1758 * bnx2i_ep_connect - establish TCP connection to target portal
1759 * @shost: scsi host
1760 * @dst_addr: target IP address
1761 * @non_blocking: blocking or non-blocking call
1762 *
1763 * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1764 * with l5_core and the CNIC. This is a multi-step process of resolving
1765 * route to target, create a iscsi connection context, handshaking with
1766 * CNIC module to create/initialize the socket struct and finally
1767 * sending down option-2 request to complete TCP 3-way handshake
1768 */
1769 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1770 struct sockaddr *dst_addr,
1771 int non_blocking)
1772 {
1773 u32 iscsi_cid = BNX2I_CID_RESERVED;
1774 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1775 struct sockaddr_in6 *desti6;
1776 struct bnx2i_endpoint *bnx2i_ep;
1777 struct bnx2i_hba *hba;
1778 struct cnic_dev *cnic;
1779 struct cnic_sockaddr saddr;
1780 struct iscsi_endpoint *ep;
1781 int rc = 0;
1782
1783 if (shost) {
1784 /* driver is given scsi host to work with */
1785 hba = iscsi_host_priv(shost);
1786 } else
1787 /*
1788 * check if the given destination can be reached through
1789 * a iscsi capable NetXtreme2 device
1790 */
1791 hba = bnx2i_check_route(dst_addr);
1792
1793 if (!hba) {
1794 rc = -EINVAL;
1795 goto nohba;
1796 }
1797 mutex_lock(&hba->net_dev_lock);
1798
1799 if (bnx2i_adapter_ready(hba) || !hba->cid_que.cid_free_cnt) {
1800 rc = -EPERM;
1801 goto check_busy;
1802 }
1803 cnic = hba->cnic;
1804 ep = bnx2i_alloc_ep(hba);
1805 if (!ep) {
1806 rc = -ENOMEM;
1807 goto check_busy;
1808 }
1809 bnx2i_ep = ep->dd_data;
1810
1811 atomic_set(&bnx2i_ep->num_active_cmds, 0);
1812 iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1813 if (iscsi_cid == -1) {
1814 printk(KERN_ALERT "bnx2i (%s): alloc_ep - unable to allocate "
1815 "iscsi cid\n", hba->netdev->name);
1816 rc = -ENOMEM;
1817 bnx2i_free_ep(ep);
1818 goto check_busy;
1819 }
1820 bnx2i_ep->hba_age = hba->age;
1821
1822 rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1823 if (rc != 0) {
1824 printk(KERN_ALERT "bnx2i (%s): ep_conn - alloc QP resc error"
1825 "\n", hba->netdev->name);
1826 rc = -ENOMEM;
1827 goto qp_resc_err;
1828 }
1829
1830 bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1831 bnx2i_ep->state = EP_STATE_OFLD_START;
1832 bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1833
1834 init_timer(&bnx2i_ep->ofld_timer);
1835 bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1836 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1837 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1838 add_timer(&bnx2i_ep->ofld_timer);
1839
1840 if (bnx2i_send_conn_ofld_req(hba, bnx2i_ep)) {
1841 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1842 printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1843 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1844 rc = -EBUSY;
1845 } else
1846 rc = -ENOSPC;
1847 printk(KERN_ALERT "bnx2i (%s): unable to send conn offld kwqe"
1848 "\n", hba->netdev->name);
1849 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1850 goto conn_failed;
1851 }
1852
1853 /* Wait for CNIC hardware to setup conn context and return 'cid' */
1854 wait_event_interruptible(bnx2i_ep->ofld_wait,
1855 bnx2i_ep->state != EP_STATE_OFLD_START);
1856
1857 if (signal_pending(current))
1858 flush_signals(current);
1859 del_timer_sync(&bnx2i_ep->ofld_timer);
1860
1861 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1862
1863 if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1864 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1865 printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1866 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1867 rc = -EBUSY;
1868 } else
1869 rc = -ENOSPC;
1870 goto conn_failed;
1871 }
1872
1873 rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1874 iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1875 if (rc) {
1876 rc = -EINVAL;
1877 /* Need to terminate and cleanup the connection */
1878 goto release_ep;
1879 }
1880
1881 bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1882 bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1883 clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1884
1885 memset(&saddr, 0, sizeof(saddr));
1886 if (dst_addr->sa_family == AF_INET) {
1887 desti = (struct sockaddr_in *) dst_addr;
1888 saddr.remote.v4 = *desti;
1889 saddr.local.v4.sin_family = desti->sin_family;
1890 } else if (dst_addr->sa_family == AF_INET6) {
1891 desti6 = (struct sockaddr_in6 *) dst_addr;
1892 saddr.remote.v6 = *desti6;
1893 saddr.local.v6.sin6_family = desti6->sin6_family;
1894 }
1895
1896 bnx2i_ep->timestamp = jiffies;
1897 bnx2i_ep->state = EP_STATE_CONNECT_START;
1898 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1899 rc = -EINVAL;
1900 goto conn_failed;
1901 } else
1902 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1903 if (rc)
1904 goto release_ep;
1905
1906 bnx2i_ep_active_list_add(hba, bnx2i_ep);
1907
1908 if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
1909 goto del_active_ep;
1910
1911 mutex_unlock(&hba->net_dev_lock);
1912 return ep;
1913
1914 del_active_ep:
1915 bnx2i_ep_active_list_del(hba, bnx2i_ep);
1916 release_ep:
1917 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1918 mutex_unlock(&hba->net_dev_lock);
1919 return ERR_PTR(rc);
1920 }
1921 conn_failed:
1922 bnx2i_free_qp_resc(hba, bnx2i_ep);
1923 qp_resc_err:
1924 bnx2i_free_ep(ep);
1925 check_busy:
1926 mutex_unlock(&hba->net_dev_lock);
1927 nohba:
1928 return ERR_PTR(rc);
1929 }
1930
1931
1932 /**
1933 * bnx2i_ep_poll - polls for TCP connection establishement
1934 * @ep: TCP connection (endpoint) handle
1935 * @timeout_ms: timeout value in milli secs
1936 *
1937 * polls for TCP connect request to complete
1938 */
1939 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1940 {
1941 struct bnx2i_endpoint *bnx2i_ep;
1942 int rc = 0;
1943
1944 bnx2i_ep = ep->dd_data;
1945 if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1946 (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1947 (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1948 return -1;
1949 if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1950 return 1;
1951
1952 rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1953 ((bnx2i_ep->state ==
1954 EP_STATE_OFLD_FAILED) ||
1955 (bnx2i_ep->state ==
1956 EP_STATE_CONNECT_FAILED) ||
1957 (bnx2i_ep->state ==
1958 EP_STATE_CONNECT_COMPL)),
1959 msecs_to_jiffies(timeout_ms));
1960 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED)
1961 rc = -1;
1962
1963 if (rc > 0)
1964 return 1;
1965 else if (!rc)
1966 return 0; /* timeout */
1967 else
1968 return rc;
1969 }
1970
1971
1972 /**
1973 * bnx2i_ep_tcp_conn_active - check EP state transition
1974 * @ep: endpoint pointer
1975 *
1976 * check if underlying TCP connection is active
1977 */
1978 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1979 {
1980 int ret;
1981 int cnic_dev_10g = 0;
1982
1983 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1984 cnic_dev_10g = 1;
1985
1986 switch (bnx2i_ep->state) {
1987 case EP_STATE_CLEANUP_FAILED:
1988 case EP_STATE_OFLD_FAILED:
1989 case EP_STATE_DISCONN_TIMEDOUT:
1990 ret = 0;
1991 break;
1992 case EP_STATE_CONNECT_START:
1993 case EP_STATE_CONNECT_FAILED:
1994 case EP_STATE_CONNECT_COMPL:
1995 case EP_STATE_ULP_UPDATE_START:
1996 case EP_STATE_ULP_UPDATE_COMPL:
1997 case EP_STATE_TCP_FIN_RCVD:
1998 case EP_STATE_LOGOUT_SENT:
1999 case EP_STATE_LOGOUT_RESP_RCVD:
2000 case EP_STATE_ULP_UPDATE_FAILED:
2001 ret = 1;
2002 break;
2003 case EP_STATE_TCP_RST_RCVD:
2004 if (cnic_dev_10g)
2005 ret = 0;
2006 else
2007 ret = 1;
2008 break;
2009 default:
2010 ret = 0;
2011 }
2012
2013 return ret;
2014 }
2015
2016
2017 /*
2018 * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw
2019 * @ep: TCP connection (bnx2i endpoint) handle
2020 *
2021 * executes TCP connection teardown process
2022 */
2023 int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep)
2024 {
2025 struct bnx2i_hba *hba = bnx2i_ep->hba;
2026 struct cnic_dev *cnic;
2027 struct iscsi_session *session = NULL;
2028 struct iscsi_conn *conn = NULL;
2029 int ret = 0;
2030 int close = 0;
2031 int close_ret = 0;
2032
2033 if (!hba)
2034 return 0;
2035
2036 cnic = hba->cnic;
2037 if (!cnic)
2038 return 0;
2039
2040 if (bnx2i_ep->state == EP_STATE_IDLE ||
2041 bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2042 return 0;
2043
2044 if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
2045 goto destroy_conn;
2046
2047 if (bnx2i_ep->conn) {
2048 conn = bnx2i_ep->conn->cls_conn->dd_data;
2049 session = conn->session;
2050 }
2051
2052 init_timer(&bnx2i_ep->ofld_timer);
2053 bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies;
2054 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
2055 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
2056 add_timer(&bnx2i_ep->ofld_timer);
2057
2058 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
2059 goto out;
2060
2061 if (session) {
2062 spin_lock_bh(&session->lock);
2063 if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) {
2064 if (session->state == ISCSI_STATE_LOGGING_OUT) {
2065 if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) {
2066 /* Logout sent, but no resp */
2067 printk(KERN_ALERT "bnx2i (%s): WARNING"
2068 " logout response was not "
2069 "received!\n",
2070 bnx2i_ep->hba->netdev->name);
2071 } else if (bnx2i_ep->state ==
2072 EP_STATE_LOGOUT_RESP_RCVD)
2073 close = 1;
2074 }
2075 } else
2076 close = 1;
2077
2078 spin_unlock_bh(&session->lock);
2079 }
2080
2081 bnx2i_ep->state = EP_STATE_DISCONN_START;
2082
2083 if (close)
2084 close_ret = cnic->cm_close(bnx2i_ep->cm_sk);
2085 else
2086 close_ret = cnic->cm_abort(bnx2i_ep->cm_sk);
2087
2088 if (close_ret)
2089 printk(KERN_ALERT "bnx2i (%s): close/abort(%d) returned %d\n",
2090 bnx2i_ep->hba->netdev->name, close, close_ret);
2091 else
2092 /* wait for option-2 conn teardown */
2093 wait_event_interruptible(bnx2i_ep->ofld_wait,
2094 bnx2i_ep->state != EP_STATE_DISCONN_START);
2095
2096 if (signal_pending(current))
2097 flush_signals(current);
2098 del_timer_sync(&bnx2i_ep->ofld_timer);
2099
2100 destroy_conn:
2101 bnx2i_ep_active_list_del(hba, bnx2i_ep);
2102 if (bnx2i_tear_down_conn(hba, bnx2i_ep))
2103 return -EINVAL;
2104 out:
2105 bnx2i_ep->state = EP_STATE_IDLE;
2106 return ret;
2107 }
2108
2109
2110 /**
2111 * bnx2i_ep_disconnect - executes TCP connection teardown process
2112 * @ep: TCP connection (iscsi endpoint) handle
2113 *
2114 * executes TCP connection teardown process
2115 */
2116 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
2117 {
2118 struct bnx2i_endpoint *bnx2i_ep;
2119 struct bnx2i_conn *bnx2i_conn = NULL;
2120 struct iscsi_conn *conn = NULL;
2121 struct bnx2i_hba *hba;
2122
2123 bnx2i_ep = ep->dd_data;
2124
2125 /* driver should not attempt connection cleanup until TCP_CONNECT
2126 * completes either successfully or fails. Timeout is 9-secs, so
2127 * wait for it to complete
2128 */
2129 while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
2130 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
2131 msleep(250);
2132
2133 if (bnx2i_ep->conn) {
2134 bnx2i_conn = bnx2i_ep->conn;
2135 conn = bnx2i_conn->cls_conn->dd_data;
2136 iscsi_suspend_queue(conn);
2137 }
2138 hba = bnx2i_ep->hba;
2139
2140 mutex_lock(&hba->net_dev_lock);
2141
2142 if (bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2143 goto out;
2144
2145 if (bnx2i_ep->state == EP_STATE_IDLE)
2146 goto free_resc;
2147
2148 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
2149 (bnx2i_ep->hba_age != hba->age)) {
2150 bnx2i_ep_active_list_del(hba, bnx2i_ep);
2151 goto free_resc;
2152 }
2153
2154 /* Do all chip cleanup here */
2155 if (bnx2i_hw_ep_disconnect(bnx2i_ep)) {
2156 mutex_unlock(&hba->net_dev_lock);
2157 return;
2158 }
2159 free_resc:
2160 bnx2i_free_qp_resc(hba, bnx2i_ep);
2161
2162 if (bnx2i_conn)
2163 bnx2i_conn->ep = NULL;
2164
2165 bnx2i_free_ep(ep);
2166 out:
2167 mutex_unlock(&hba->net_dev_lock);
2168
2169 wake_up_interruptible(&hba->eh_wait);
2170 }
2171
2172
2173 /**
2174 * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
2175 * @buf: pointer to buffer containing iscsi path message
2176 *
2177 */
2178 static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
2179 {
2180 struct bnx2i_hba *hba = iscsi_host_priv(shost);
2181 char *buf = (char *) params;
2182 u16 len = sizeof(*params);
2183
2184 /* handled by cnic driver */
2185 hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
2186 len);
2187
2188 return 0;
2189 }
2190
2191 static umode_t bnx2i_attr_is_visible(int param_type, int param)
2192 {
2193 switch (param_type) {
2194 case ISCSI_HOST_PARAM:
2195 switch (param) {
2196 case ISCSI_HOST_PARAM_NETDEV_NAME:
2197 case ISCSI_HOST_PARAM_HWADDRESS:
2198 case ISCSI_HOST_PARAM_IPADDRESS:
2199 return S_IRUGO;
2200 default:
2201 return 0;
2202 }
2203 case ISCSI_PARAM:
2204 switch (param) {
2205 case ISCSI_PARAM_MAX_RECV_DLENGTH:
2206 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
2207 case ISCSI_PARAM_HDRDGST_EN:
2208 case ISCSI_PARAM_DATADGST_EN:
2209 case ISCSI_PARAM_CONN_ADDRESS:
2210 case ISCSI_PARAM_CONN_PORT:
2211 case ISCSI_PARAM_EXP_STATSN:
2212 case ISCSI_PARAM_PERSISTENT_ADDRESS:
2213 case ISCSI_PARAM_PERSISTENT_PORT:
2214 case ISCSI_PARAM_PING_TMO:
2215 case ISCSI_PARAM_RECV_TMO:
2216 case ISCSI_PARAM_INITIAL_R2T_EN:
2217 case ISCSI_PARAM_MAX_R2T:
2218 case ISCSI_PARAM_IMM_DATA_EN:
2219 case ISCSI_PARAM_FIRST_BURST:
2220 case ISCSI_PARAM_MAX_BURST:
2221 case ISCSI_PARAM_PDU_INORDER_EN:
2222 case ISCSI_PARAM_DATASEQ_INORDER_EN:
2223 case ISCSI_PARAM_ERL:
2224 case ISCSI_PARAM_TARGET_NAME:
2225 case ISCSI_PARAM_TPGT:
2226 case ISCSI_PARAM_USERNAME:
2227 case ISCSI_PARAM_PASSWORD:
2228 case ISCSI_PARAM_USERNAME_IN:
2229 case ISCSI_PARAM_PASSWORD_IN:
2230 case ISCSI_PARAM_FAST_ABORT:
2231 case ISCSI_PARAM_ABORT_TMO:
2232 case ISCSI_PARAM_LU_RESET_TMO:
2233 case ISCSI_PARAM_TGT_RESET_TMO:
2234 case ISCSI_PARAM_IFACE_NAME:
2235 case ISCSI_PARAM_INITIATOR_NAME:
2236 return S_IRUGO;
2237 default:
2238 return 0;
2239 }
2240 }
2241
2242 return 0;
2243 }
2244
2245 /*
2246 * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
2247 * used while registering with the scsi host and iSCSI transport module.
2248 */
2249 static struct scsi_host_template bnx2i_host_template = {
2250 .module = THIS_MODULE,
2251 .name = "Broadcom Offload iSCSI Initiator",
2252 .proc_name = "bnx2i",
2253 .queuecommand = iscsi_queuecommand,
2254 .eh_abort_handler = iscsi_eh_abort,
2255 .eh_device_reset_handler = iscsi_eh_device_reset,
2256 .eh_target_reset_handler = iscsi_eh_recover_target,
2257 .change_queue_depth = iscsi_change_queue_depth,
2258 .target_alloc = iscsi_target_alloc,
2259 .can_queue = 2048,
2260 .max_sectors = 127,
2261 .cmd_per_lun = 128,
2262 .this_id = -1,
2263 .use_clustering = ENABLE_CLUSTERING,
2264 .sg_tablesize = ISCSI_MAX_BDS_PER_CMD,
2265 .shost_attrs = bnx2i_dev_attributes,
2266 };
2267
2268 struct iscsi_transport bnx2i_iscsi_transport = {
2269 .owner = THIS_MODULE,
2270 .name = "bnx2i",
2271 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST |
2272 CAP_MULTI_R2T | CAP_DATADGST |
2273 CAP_DATA_PATH_OFFLOAD |
2274 CAP_TEXT_NEGO,
2275 .create_session = bnx2i_session_create,
2276 .destroy_session = bnx2i_session_destroy,
2277 .create_conn = bnx2i_conn_create,
2278 .bind_conn = bnx2i_conn_bind,
2279 .destroy_conn = bnx2i_conn_destroy,
2280 .attr_is_visible = bnx2i_attr_is_visible,
2281 .set_param = iscsi_set_param,
2282 .get_conn_param = iscsi_conn_get_param,
2283 .get_session_param = iscsi_session_get_param,
2284 .get_host_param = bnx2i_host_get_param,
2285 .start_conn = bnx2i_conn_start,
2286 .stop_conn = iscsi_conn_stop,
2287 .send_pdu = iscsi_conn_send_pdu,
2288 .xmit_task = bnx2i_task_xmit,
2289 .get_stats = bnx2i_conn_get_stats,
2290 /* TCP connect - disconnect - option-2 interface calls */
2291 .get_ep_param = bnx2i_ep_get_param,
2292 .ep_connect = bnx2i_ep_connect,
2293 .ep_poll = bnx2i_ep_poll,
2294 .ep_disconnect = bnx2i_ep_disconnect,
2295 .set_path = bnx2i_nl_set_path,
2296 /* Error recovery timeout call */
2297 .session_recovery_timedout = iscsi_session_recovery_timedout,
2298 .cleanup_task = bnx2i_cleanup_task,
2299 };
Linux kernel - Deliverables
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