2 * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver.
4 * Copyright (c) 2006 - 2010 Broadcom Corporation
5 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
6 * Copyright (c) 2007, 2008 Mike Christie
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.
12 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
13 * Maintained by: Eddie Wai (eddie.wai@broadcom.com)
16 #include <linux/slab.h>
17 #include <scsi/scsi_tcq.h>
18 #include <scsi/libiscsi.h>
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;
26 * Global endpoint resource info
28 static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */
31 static int bnx2i_adapter_ready(struct bnx2i_hba *hba)
35 if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
36 test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
37 test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
43 * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks
44 * @cmd: iscsi cmd struct pointer
45 * @buf_off: absolute buffer offset
46 * @start_bd_off: u32 pointer to return the offset within the BD
47 * indicated by 'start_bd_idx' on which 'buf_off' falls
48 * @start_bd_idx: index of the BD on which 'buf_off' falls
50 * identifies & marks various bd info for scsi command's imm data,
51 * unsolicited data and the first solicited data seq.
53 static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off,
54 u32 *start_bd_off, u32 *start_bd_idx)
56 struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl;
61 while (buf_off >= (cur_offset + bd_tbl->buffer_length)) {
62 cur_offset += bd_tbl->buffer_length;
68 *start_bd_off = buf_off - cur_offset;
69 *start_bd_idx = cur_bd_idx;
73 * bnx2i_setup_write_cmd_bd_info - sets up BD various information
74 * @task: transport layer's cmd struct pointer
76 * identifies & marks various bd info for scsi command's immediate data,
77 * unsolicited data and first solicited data seq which includes BD start
78 * index & BD buf off. his function takes into account iscsi parameter such
79 * as immediate data and unsolicited data is support on this connection.
81 static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task)
83 struct bnx2i_cmd *cmd = task->dd_data;
86 u32 buffer_offset = 0;
87 u32 cmd_len = cmd->req.total_data_transfer_length;
89 /* if ImmediateData is turned off & IntialR2T is turned on,
90 * there will be no immediate or unsolicited data, just return.
92 if (!iscsi_task_has_unsol_data(task) && !task->imm_count)
96 buffer_offset += task->imm_count;
97 if (task->imm_count == cmd_len)
100 if (iscsi_task_has_unsol_data(task)) {
101 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
102 &start_bd_offset, &start_bd_idx);
103 cmd->req.ud_buffer_offset = start_bd_offset;
104 cmd->req.ud_start_bd_index = start_bd_idx;
105 buffer_offset += task->unsol_r2t.data_length;
108 if (buffer_offset != cmd_len) {
109 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
110 &start_bd_offset, &start_bd_idx);
111 if ((start_bd_offset > task->conn->session->first_burst) ||
112 (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) {
115 iscsi_conn_printk(KERN_ALERT, task->conn,
116 "bnx2i- error, buf offset 0x%x "
117 "bd_valid %d use_sg %d\n",
118 buffer_offset, cmd->io_tbl.bd_valid,
119 scsi_sg_count(cmd->scsi_cmd));
120 for (i = 0; i < cmd->io_tbl.bd_valid; i++)
121 iscsi_conn_printk(KERN_ALERT, task->conn,
122 "bnx2i err, bd[%d]: len %x\n",
123 i, cmd->io_tbl.bd_tbl[i].\
126 cmd->req.sd_buffer_offset = start_bd_offset;
127 cmd->req.sd_start_bd_index = start_bd_idx;
134 * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
135 * @hba: adapter instance
136 * @cmd: iscsi cmd struct pointer
140 static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
142 struct scsi_cmnd *sc = cmd->scsi_cmd;
143 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
144 struct scatterlist *sg;
152 BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD);
154 sg_count = scsi_dma_map(sc);
156 scsi_for_each_sg(sc, sg, sg_count, i) {
157 sg_len = sg_dma_len(sg);
158 addr = (u64) sg_dma_address(sg);
159 bd[bd_count].buffer_addr_lo = addr & 0xffffffff;
160 bd[bd_count].buffer_addr_hi = addr >> 32;
161 bd[bd_count].buffer_length = sg_len;
162 bd[bd_count].flags = 0;
164 bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;
166 byte_count += sg_len;
171 bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
173 BUG_ON(byte_count != scsi_bufflen(sc));
178 * bnx2i_iscsi_map_sg_list - maps SG list
179 * @cmd: iscsi cmd struct pointer
181 * creates BD list table for the command
183 static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)
187 bd_count = bnx2i_map_scsi_sg(cmd->conn->hba, cmd);
189 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
191 bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;
192 bd[0].buffer_length = bd[0].flags = 0;
194 cmd->io_tbl.bd_valid = bd_count;
199 * bnx2i_iscsi_unmap_sg_list - unmaps SG list
200 * @cmd: iscsi cmd struct pointer
202 * unmap IO buffers and invalidate the BD table
204 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)
206 struct scsi_cmnd *sc = cmd->scsi_cmd;
208 if (cmd->io_tbl.bd_valid && sc) {
210 cmd->io_tbl.bd_valid = 0;
214 static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)
216 memset(&cmd->req, 0x00, sizeof(cmd->req));
217 cmd->req.op_code = 0xFF;
218 cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma;
219 cmd->req.bd_list_addr_hi =
220 (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32);
226 * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'
227 * @hba: pointer to adapter instance
228 * @conn: pointer to iscsi connection
229 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
231 * update iscsi cid table entry with connection pointer. This enables
232 * driver to quickly get hold of connection structure pointer in
233 * completion/interrupt thread using iscsi context ID
235 static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,
236 struct bnx2i_conn *bnx2i_conn,
239 if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {
240 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
241 "conn bind - entry #%d not free\n", iscsi_cid);
245 hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn;
251 * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr
252 * @hba: pointer to adapter instance
253 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
255 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
258 if (!hba->cid_que.conn_cid_tbl) {
259 printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n");
262 } else if (iscsi_cid >= hba->max_active_conns) {
263 printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid);
266 return hba->cid_que.conn_cid_tbl[iscsi_cid];
271 * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
272 * @hba: pointer to adapter instance
274 static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)
278 if (!hba->cid_que.cid_free_cnt)
281 idx = hba->cid_que.cid_q_cons_idx;
282 hba->cid_que.cid_q_cons_idx++;
283 if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx)
284 hba->cid_que.cid_q_cons_idx = 0;
286 hba->cid_que.cid_free_cnt--;
287 return hba->cid_que.cid_que[idx];
292 * bnx2i_free_iscsi_cid - returns tcp port to free list
293 * @hba: pointer to adapter instance
294 * @iscsi_cid: iscsi context ID to free
296 static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)
300 if (iscsi_cid == (u16) -1)
303 hba->cid_que.cid_free_cnt++;
305 idx = hba->cid_que.cid_q_prod_idx;
306 hba->cid_que.cid_que[idx] = iscsi_cid;
307 hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL;
308 hba->cid_que.cid_q_prod_idx++;
309 if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx)
310 hba->cid_que.cid_q_prod_idx = 0;
315 * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
316 * @hba: pointer to adapter instance
318 * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
319 * and initialize table attributes
321 static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)
326 mem_size = hba->max_active_conns * sizeof(u32);
327 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
329 hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL);
330 if (!hba->cid_que.cid_que_base)
333 mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *);
334 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
335 hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL);
336 if (!hba->cid_que.conn_cid_tbl) {
337 kfree(hba->cid_que.cid_que_base);
338 hba->cid_que.cid_que_base = NULL;
342 hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base;
343 hba->cid_que.cid_q_prod_idx = 0;
344 hba->cid_que.cid_q_cons_idx = 0;
345 hba->cid_que.cid_q_max_idx = hba->max_active_conns;
346 hba->cid_que.cid_free_cnt = hba->max_active_conns;
348 for (i = 0; i < hba->max_active_conns; i++) {
349 hba->cid_que.cid_que[i] = i;
350 hba->cid_que.conn_cid_tbl[i] = NULL;
357 * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
358 * @hba: pointer to adapter instance
360 static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)
362 kfree(hba->cid_que.cid_que_base);
363 hba->cid_que.cid_que_base = NULL;
365 kfree(hba->cid_que.conn_cid_tbl);
366 hba->cid_que.conn_cid_tbl = NULL;
371 * bnx2i_alloc_ep - allocates ep structure from global pool
372 * @hba: pointer to adapter instance
374 * routine allocates a free endpoint structure from global pool and
375 * a tcp port to be used for this connection. Global resource lock,
376 * 'bnx2i_resc_lock' is held while accessing shared global data structures
378 static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)
380 struct iscsi_endpoint *ep;
381 struct bnx2i_endpoint *bnx2i_ep;
383 ep = iscsi_create_endpoint(sizeof(*bnx2i_ep));
385 printk(KERN_ERR "bnx2i: Could not allocate ep\n");
389 bnx2i_ep = ep->dd_data;
390 bnx2i_ep->cls_ep = ep;
391 INIT_LIST_HEAD(&bnx2i_ep->link);
392 bnx2i_ep->state = EP_STATE_IDLE;
393 bnx2i_ep->ep_iscsi_cid = (u16) -1;
395 bnx2i_ep->hba_age = hba->age;
396 hba->ofld_conns_active++;
397 init_waitqueue_head(&bnx2i_ep->ofld_wait);
403 * bnx2i_free_ep - free endpoint
404 * @ep: pointer to iscsi endpoint structure
406 static void bnx2i_free_ep(struct iscsi_endpoint *ep)
408 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
411 spin_lock_irqsave(&bnx2i_resc_lock, flags);
412 bnx2i_ep->state = EP_STATE_IDLE;
413 bnx2i_ep->hba->ofld_conns_active--;
415 if (bnx2i_ep->ep_iscsi_cid != (u16) -1)
416 bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);
418 if (bnx2i_ep->conn) {
419 bnx2i_ep->conn->ep = NULL;
420 bnx2i_ep->conn = NULL;
423 bnx2i_ep->hba = NULL;
424 spin_unlock_irqrestore(&bnx2i_resc_lock, flags);
425 iscsi_destroy_endpoint(ep);
430 * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
431 * @hba: adapter instance pointer
432 * @session: iscsi session pointer
433 * @cmd: iscsi command structure
435 static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,
436 struct bnx2i_cmd *cmd)
438 struct io_bdt *io = &cmd->io_tbl;
441 io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
442 ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),
443 &io->bd_tbl_dma, GFP_KERNEL);
445 iscsi_session_printk(KERN_ERR, session, "Could not "
454 * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
455 * @hba: adapter instance pointer
456 * @session: iscsi session pointer
457 * @cmd: iscsi command structure
459 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
460 struct iscsi_session *session)
464 for (i = 0; i < session->cmds_max; i++) {
465 struct iscsi_task *task = session->cmds[i];
466 struct bnx2i_cmd *cmd = task->dd_data;
468 if (cmd->io_tbl.bd_tbl)
469 dma_free_coherent(&hba->pcidev->dev,
470 ISCSI_MAX_BDS_PER_CMD *
471 sizeof(struct iscsi_bd),
473 cmd->io_tbl.bd_tbl_dma);
480 * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
481 * @hba: adapter instance pointer
482 * @session: iscsi session pointer
484 static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
485 struct iscsi_session *session)
489 for (i = 0; i < session->cmds_max; i++) {
490 struct iscsi_task *task = session->cmds[i];
491 struct bnx2i_cmd *cmd = task->dd_data;
493 task->hdr = &cmd->hdr;
494 task->hdr_max = sizeof(struct iscsi_hdr);
496 if (bnx2i_alloc_bdt(hba, session, cmd))
503 bnx2i_destroy_cmd_pool(hba, session);
509 * bnx2i_setup_mp_bdt - allocate BD table resources
510 * @hba: pointer to adapter structure
512 * Allocate memory for dummy buffer and associated BD
513 * table to be used by middle path (MP) requests
515 static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
518 struct iscsi_bd *mp_bdt;
521 hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
522 &hba->mp_bd_dma, GFP_KERNEL);
523 if (!hba->mp_bd_tbl) {
524 printk(KERN_ERR "unable to allocate Middle Path BDT\n");
529 hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
530 &hba->dummy_buf_dma, GFP_KERNEL);
531 if (!hba->dummy_buffer) {
532 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
533 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
534 hba->mp_bd_tbl, hba->mp_bd_dma);
535 hba->mp_bd_tbl = NULL;
540 mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
541 addr = (unsigned long) hba->dummy_buf_dma;
542 mp_bdt->buffer_addr_lo = addr & 0xffffffff;
543 mp_bdt->buffer_addr_hi = addr >> 32;
544 mp_bdt->buffer_length = PAGE_SIZE;
545 mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
546 ISCSI_BD_FIRST_IN_BD_CHAIN;
553 * bnx2i_free_mp_bdt - releases ITT back to free pool
554 * @hba: pointer to adapter instance
556 * free MP dummy buffer and associated BD table
558 static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
560 if (hba->mp_bd_tbl) {
561 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
562 hba->mp_bd_tbl, hba->mp_bd_dma);
563 hba->mp_bd_tbl = NULL;
565 if (hba->dummy_buffer) {
566 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
567 hba->dummy_buffer, hba->dummy_buf_dma);
568 hba->dummy_buffer = NULL;
574 * bnx2i_drop_session - notifies iscsid of connection error.
575 * @hba: adapter instance pointer
576 * @session: iscsi session pointer
578 * This notifies iscsid that there is a error, so it can initiate
581 * This relies on caller using the iscsi class iterator so the object
582 * is refcounted and does not disapper from under us.
584 void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
586 iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
590 * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
591 * @hba: pointer to adapter instance
592 * @ep: pointer to endpoint (transport indentifier) structure
594 * EP destroy queue manager
596 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
597 struct bnx2i_endpoint *ep)
599 write_lock_bh(&hba->ep_rdwr_lock);
600 list_add_tail(&ep->link, &hba->ep_destroy_list);
601 write_unlock_bh(&hba->ep_rdwr_lock);
606 * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
608 * @hba: pointer to adapter instance
609 * @ep: pointer to endpoint (transport indentifier) structure
611 * EP destroy queue manager
613 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
614 struct bnx2i_endpoint *ep)
616 write_lock_bh(&hba->ep_rdwr_lock);
617 list_del_init(&ep->link);
618 write_unlock_bh(&hba->ep_rdwr_lock);
624 * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
625 * @hba: pointer to adapter instance
626 * @ep: pointer to endpoint (transport indentifier) structure
628 * pending conn offload completion queue manager
630 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
631 struct bnx2i_endpoint *ep)
633 write_lock_bh(&hba->ep_rdwr_lock);
634 list_add_tail(&ep->link, &hba->ep_ofld_list);
635 write_unlock_bh(&hba->ep_rdwr_lock);
640 * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
641 * @hba: pointer to adapter instance
642 * @ep: pointer to endpoint (transport indentifier) structure
644 * pending conn offload completion queue manager
646 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
647 struct bnx2i_endpoint *ep)
649 write_lock_bh(&hba->ep_rdwr_lock);
650 list_del_init(&ep->link);
651 write_unlock_bh(&hba->ep_rdwr_lock);
657 * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
659 * @hba: pointer to adapter instance
660 * @iscsi_cid: iscsi context ID to find
663 struct bnx2i_endpoint *
664 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
666 struct list_head *list;
667 struct list_head *tmp;
668 struct bnx2i_endpoint *ep;
670 read_lock_bh(&hba->ep_rdwr_lock);
671 list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
672 ep = (struct bnx2i_endpoint *)list;
674 if (ep->ep_iscsi_cid == iscsi_cid)
678 read_unlock_bh(&hba->ep_rdwr_lock);
681 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
686 * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
687 * @hba: pointer to adapter instance
688 * @iscsi_cid: iscsi context ID to find
691 struct bnx2i_endpoint *
692 bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
694 struct list_head *list;
695 struct list_head *tmp;
696 struct bnx2i_endpoint *ep;
698 read_lock_bh(&hba->ep_rdwr_lock);
699 list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
700 ep = (struct bnx2i_endpoint *)list;
702 if (ep->ep_iscsi_cid == iscsi_cid)
706 read_unlock_bh(&hba->ep_rdwr_lock);
709 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
715 * bnx2i_ep_active_list_add - add an entry to ep active list
716 * @hba: pointer to adapter instance
717 * @ep: pointer to endpoint (transport indentifier) structure
719 * current active conn queue manager
721 static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba,
722 struct bnx2i_endpoint *ep)
724 write_lock_bh(&hba->ep_rdwr_lock);
725 list_add_tail(&ep->link, &hba->ep_active_list);
726 write_unlock_bh(&hba->ep_rdwr_lock);
731 * bnx2i_ep_active_list_del - deletes an entry to ep active list
732 * @hba: pointer to adapter instance
733 * @ep: pointer to endpoint (transport indentifier) structure
735 * current active conn queue manager
737 static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba,
738 struct bnx2i_endpoint *ep)
740 write_lock_bh(&hba->ep_rdwr_lock);
741 list_del_init(&ep->link);
742 write_unlock_bh(&hba->ep_rdwr_lock);
747 * bnx2i_setup_host_queue_size - assigns shost->can_queue param
748 * @hba: pointer to adapter instance
749 * @shost: scsi host pointer
751 * Initializes 'can_queue' parameter based on how many outstanding commands
752 * the device can handle. Each device 5708/5709/57710 has different
755 static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
756 struct Scsi_Host *shost)
758 if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
759 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
760 else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
761 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
762 else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
763 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
765 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
770 * bnx2i_alloc_hba - allocate and init adapter instance
771 * @cnic: cnic device pointer
773 * allocate & initialize adapter structure and call other
774 * support routines to do per adapter initialization
776 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
778 struct Scsi_Host *shost;
779 struct bnx2i_hba *hba;
781 shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
784 shost->dma_boundary = cnic->pcidev->dma_mask;
785 shost->transportt = bnx2i_scsi_xport_template;
786 shost->max_id = ISCSI_MAX_CONNS_PER_HBA;
787 shost->max_channel = 0;
788 shost->max_lun = 512;
789 shost->max_cmd_len = 16;
791 hba = iscsi_host_priv(shost);
793 hba->netdev = cnic->netdev;
794 /* Get PCI related information and update hba struct members */
795 hba->pcidev = cnic->pcidev;
796 pci_dev_get(hba->pcidev);
797 hba->pci_did = hba->pcidev->device;
798 hba->pci_vid = hba->pcidev->vendor;
799 hba->pci_sdid = hba->pcidev->subsystem_device;
800 hba->pci_svid = hba->pcidev->subsystem_vendor;
801 hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
802 hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
804 bnx2i_identify_device(hba);
805 bnx2i_setup_host_queue_size(hba, shost);
807 if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
808 hba->regview = ioremap_nocache(hba->netdev->base_addr,
812 } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
813 hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096);
818 if (bnx2i_setup_mp_bdt(hba))
821 INIT_LIST_HEAD(&hba->ep_ofld_list);
822 INIT_LIST_HEAD(&hba->ep_active_list);
823 INIT_LIST_HEAD(&hba->ep_destroy_list);
824 rwlock_init(&hba->ep_rdwr_lock);
826 hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
828 /* different values for 5708/5709/57710 */
829 hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
831 if (bnx2i_setup_free_cid_que(hba))
834 /* SQ/RQ/CQ size can be changed via sysfx interface */
835 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
836 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
837 hba->max_sqes = sq_size;
839 hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
840 } else { /* 5706/5708/5709 */
841 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
842 hba->max_sqes = sq_size;
844 hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
847 hba->max_rqes = rq_size;
848 hba->max_cqes = hba->max_sqes + rq_size;
849 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
850 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
851 hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
852 } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
853 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
855 hba->num_ccell = hba->max_sqes / 2;
857 spin_lock_init(&hba->lock);
858 mutex_init(&hba->net_dev_lock);
859 init_waitqueue_head(&hba->eh_wait);
860 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
861 hba->hba_shutdown_tmo = 20 * HZ;
862 hba->conn_teardown_tmo = 20 * HZ;
863 hba->conn_ctx_destroy_tmo = 6 * HZ;
864 } else { /* 5706/5708/5709 */
865 hba->hba_shutdown_tmo = 20 * HZ;
866 hba->conn_teardown_tmo = 10 * HZ;
867 hba->conn_ctx_destroy_tmo = 2 * HZ;
870 if (iscsi_host_add(shost, &hba->pcidev->dev))
875 bnx2i_release_free_cid_que(hba);
877 bnx2i_free_mp_bdt(hba);
880 iounmap(hba->regview);
884 pci_dev_put(hba->pcidev);
885 scsi_host_put(shost);
890 * bnx2i_free_hba- releases hba structure and resources held by the adapter
891 * @hba: pointer to adapter instance
893 * free adapter structure and call various cleanup routines.
895 void bnx2i_free_hba(struct bnx2i_hba *hba)
897 struct Scsi_Host *shost = hba->shost;
899 iscsi_host_remove(shost);
900 INIT_LIST_HEAD(&hba->ep_ofld_list);
901 INIT_LIST_HEAD(&hba->ep_active_list);
902 INIT_LIST_HEAD(&hba->ep_destroy_list);
903 pci_dev_put(hba->pcidev);
906 iounmap(hba->regview);
909 bnx2i_free_mp_bdt(hba);
910 bnx2i_release_free_cid_que(hba);
911 iscsi_host_free(shost);
915 * bnx2i_conn_free_login_resources - free DMA resources used for login process
916 * @hba: pointer to adapter instance
917 * @bnx2i_conn: iscsi connection pointer
919 * Login related resources, mostly BDT & payload DMA memory is freed
921 static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
922 struct bnx2i_conn *bnx2i_conn)
924 if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
925 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
926 bnx2i_conn->gen_pdu.resp_bd_tbl,
927 bnx2i_conn->gen_pdu.resp_bd_dma);
928 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
931 if (bnx2i_conn->gen_pdu.req_bd_tbl) {
932 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
933 bnx2i_conn->gen_pdu.req_bd_tbl,
934 bnx2i_conn->gen_pdu.req_bd_dma);
935 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
938 if (bnx2i_conn->gen_pdu.resp_buf) {
939 dma_free_coherent(&hba->pcidev->dev,
940 ISCSI_DEF_MAX_RECV_SEG_LEN,
941 bnx2i_conn->gen_pdu.resp_buf,
942 bnx2i_conn->gen_pdu.resp_dma_addr);
943 bnx2i_conn->gen_pdu.resp_buf = NULL;
946 if (bnx2i_conn->gen_pdu.req_buf) {
947 dma_free_coherent(&hba->pcidev->dev,
948 ISCSI_DEF_MAX_RECV_SEG_LEN,
949 bnx2i_conn->gen_pdu.req_buf,
950 bnx2i_conn->gen_pdu.req_dma_addr);
951 bnx2i_conn->gen_pdu.req_buf = NULL;
956 * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
957 * @hba: pointer to adapter instance
958 * @bnx2i_conn: iscsi connection pointer
960 * Mgmt task DNA resources are allocated in this routine.
962 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
963 struct bnx2i_conn *bnx2i_conn)
965 /* Allocate memory for login request/response buffers */
966 bnx2i_conn->gen_pdu.req_buf =
967 dma_alloc_coherent(&hba->pcidev->dev,
968 ISCSI_DEF_MAX_RECV_SEG_LEN,
969 &bnx2i_conn->gen_pdu.req_dma_addr,
971 if (bnx2i_conn->gen_pdu.req_buf == NULL)
972 goto login_req_buf_failure;
974 bnx2i_conn->gen_pdu.req_buf_size = 0;
975 bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
977 bnx2i_conn->gen_pdu.resp_buf =
978 dma_alloc_coherent(&hba->pcidev->dev,
979 ISCSI_DEF_MAX_RECV_SEG_LEN,
980 &bnx2i_conn->gen_pdu.resp_dma_addr,
982 if (bnx2i_conn->gen_pdu.resp_buf == NULL)
983 goto login_resp_buf_failure;
985 bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
986 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
988 bnx2i_conn->gen_pdu.req_bd_tbl =
989 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
990 &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
991 if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
992 goto login_req_bd_tbl_failure;
994 bnx2i_conn->gen_pdu.resp_bd_tbl =
995 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
996 &bnx2i_conn->gen_pdu.resp_bd_dma,
998 if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
999 goto login_resp_bd_tbl_failure;
1003 login_resp_bd_tbl_failure:
1004 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
1005 bnx2i_conn->gen_pdu.req_bd_tbl,
1006 bnx2i_conn->gen_pdu.req_bd_dma);
1007 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
1009 login_req_bd_tbl_failure:
1010 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1011 bnx2i_conn->gen_pdu.resp_buf,
1012 bnx2i_conn->gen_pdu.resp_dma_addr);
1013 bnx2i_conn->gen_pdu.resp_buf = NULL;
1014 login_resp_buf_failure:
1015 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1016 bnx2i_conn->gen_pdu.req_buf,
1017 bnx2i_conn->gen_pdu.req_dma_addr);
1018 bnx2i_conn->gen_pdu.req_buf = NULL;
1019 login_req_buf_failure:
1020 iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
1021 "login resource alloc failed!!\n");
1028 * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
1029 * @bnx2i_conn: iscsi connection pointer
1031 * Allocates buffers and BD tables before shipping requests to cnic
1032 * for PDUs prepared by 'iscsid' daemon
1034 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
1036 struct iscsi_bd *bd_tbl;
1038 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
1040 bd_tbl->buffer_addr_hi =
1041 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
1042 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
1043 bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
1044 bnx2i_conn->gen_pdu.req_buf;
1045 bd_tbl->reserved0 = 0;
1046 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1047 ISCSI_BD_FIRST_IN_BD_CHAIN;
1049 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1050 bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1051 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1052 bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1053 bd_tbl->reserved0 = 0;
1054 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1055 ISCSI_BD_FIRST_IN_BD_CHAIN;
1060 * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1061 * @task: transport layer task pointer
1063 * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1064 * Nop-out and Logout requests flow through this path.
1066 static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1068 struct bnx2i_cmd *cmd = task->dd_data;
1069 struct bnx2i_conn *bnx2i_conn = cmd->conn;
1074 bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1075 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1076 case ISCSI_OP_LOGIN:
1077 bnx2i_send_iscsi_login(bnx2i_conn, task);
1079 case ISCSI_OP_NOOP_OUT:
1080 data_len = bnx2i_conn->gen_pdu.req_buf_size;
1081 buf = bnx2i_conn->gen_pdu.req_buf;
1083 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1086 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1089 case ISCSI_OP_LOGOUT:
1090 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1092 case ISCSI_OP_SCSI_TMFUNC:
1093 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1096 rc = bnx2i_send_iscsi_text(bnx2i_conn, task);
1099 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1100 "send_gen: unsupported op 0x%x\n",
1107 /**********************************************************************
1109 **********************************************************************/
1112 * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1113 * @sc: SCSI-ML command pointer
1114 * @cmd: iscsi cmd pointer
1116 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1124 int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1125 cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1126 cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1128 lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1129 srcp = (u8 *) sc->cmnd;
1130 dstp = (u32 *) cmd->req.cdb;
1132 memcpy(&dword, (const void *) srcp, 4);
1133 *dstp = cpu_to_be32(dword);
1137 if (sc->cmd_len & 0x3) {
1138 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1139 *dstp = cpu_to_be32(dword);
1143 static void bnx2i_cleanup_task(struct iscsi_task *task)
1145 struct iscsi_conn *conn = task->conn;
1146 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1147 struct bnx2i_hba *hba = bnx2i_conn->hba;
1150 * mgmt task or cmd was never sent to us to transmit.
1152 if (!task->sc || task->state == ISCSI_TASK_PENDING)
1155 * need to clean-up task context to claim dma buffers
1157 if (task->state == ISCSI_TASK_ABRT_TMF) {
1158 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1160 spin_unlock_bh(&conn->session->lock);
1161 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1162 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1163 spin_lock_bh(&conn->session->lock);
1165 bnx2i_iscsi_unmap_sg_list(task->dd_data);
1169 * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1170 * @conn: transport layer conn structure pointer
1171 * @task: transport layer command structure pointer
1174 bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1176 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1177 struct bnx2i_cmd *cmd = task->dd_data;
1179 memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1181 bnx2i_setup_cmd_wqe_template(cmd);
1182 bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1183 if (task->data_count) {
1184 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1186 bnx2i_conn->gen_pdu.req_wr_ptr =
1187 bnx2i_conn->gen_pdu.req_buf + task->data_count;
1189 cmd->conn = conn->dd_data;
1190 cmd->scsi_cmd = NULL;
1191 return bnx2i_iscsi_send_generic_request(task);
1195 * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1196 * @task: transport layer command structure pointer
1198 * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1200 static int bnx2i_task_xmit(struct iscsi_task *task)
1202 struct iscsi_conn *conn = task->conn;
1203 struct iscsi_session *session = conn->session;
1204 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1205 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1206 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1207 struct scsi_cmnd *sc = task->sc;
1208 struct bnx2i_cmd *cmd = task->dd_data;
1209 struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr;
1212 * If there is no scsi_cmnd this must be a mgmt task
1215 return bnx2i_mtask_xmit(conn, task);
1217 bnx2i_setup_cmd_wqe_template(cmd);
1218 cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1219 cmd->conn = bnx2i_conn;
1221 cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1222 cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1224 bnx2i_iscsi_map_sg_list(cmd);
1225 bnx2i_cpy_scsi_cdb(sc, cmd);
1227 cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1228 if (sc->sc_data_direction == DMA_TO_DEVICE) {
1229 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1230 cmd->req.itt = task->itt |
1231 (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1232 bnx2i_setup_write_cmd_bd_info(task);
1234 if (scsi_bufflen(sc))
1235 cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1236 cmd->req.itt = task->itt |
1237 (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1240 cmd->req.num_bds = cmd->io_tbl.bd_valid;
1241 if (!cmd->io_tbl.bd_valid) {
1242 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1243 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1244 cmd->req.num_bds = 1;
1247 bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1252 * bnx2i_session_create - create a new iscsi session
1253 * @cmds_max: max commands supported
1254 * @qdepth: scsi queue depth to support
1255 * @initial_cmdsn: initial iscsi CMDSN to be used for this session
1257 * Creates a new iSCSI session instance on given device.
1259 static struct iscsi_cls_session *
1260 bnx2i_session_create(struct iscsi_endpoint *ep,
1261 uint16_t cmds_max, uint16_t qdepth,
1262 uint32_t initial_cmdsn)
1264 struct Scsi_Host *shost;
1265 struct iscsi_cls_session *cls_session;
1266 struct bnx2i_hba *hba;
1267 struct bnx2i_endpoint *bnx2i_ep;
1270 printk(KERN_ERR "bnx2i: missing ep.\n");
1274 bnx2i_ep = ep->dd_data;
1275 shost = bnx2i_ep->hba->shost;
1276 hba = iscsi_host_priv(shost);
1277 if (bnx2i_adapter_ready(hba))
1281 * user can override hw limit as long as it is within
1284 if (cmds_max > hba->max_sqes)
1285 cmds_max = hba->max_sqes;
1286 else if (cmds_max < BNX2I_SQ_WQES_MIN)
1287 cmds_max = BNX2I_SQ_WQES_MIN;
1289 cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1290 cmds_max, 0, sizeof(struct bnx2i_cmd),
1291 initial_cmdsn, ISCSI_MAX_TARGET);
1295 if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1296 goto session_teardown;
1300 iscsi_session_teardown(cls_session);
1306 * bnx2i_session_destroy - destroys iscsi session
1307 * @cls_session: pointer to iscsi cls session
1309 * Destroys previously created iSCSI session instance and releases
1310 * all resources held by it
1312 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1314 struct iscsi_session *session = cls_session->dd_data;
1315 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1316 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1318 bnx2i_destroy_cmd_pool(hba, session);
1319 iscsi_session_teardown(cls_session);
1324 * bnx2i_conn_create - create iscsi connection instance
1325 * @cls_session: pointer to iscsi cls session
1326 * @cid: iscsi cid as per rfc (not NX2's CID terminology)
1328 * Creates a new iSCSI connection instance for a given session
1330 static struct iscsi_cls_conn *
1331 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1333 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1334 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1335 struct bnx2i_conn *bnx2i_conn;
1336 struct iscsi_cls_conn *cls_conn;
1337 struct iscsi_conn *conn;
1339 cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1343 conn = cls_conn->dd_data;
1345 bnx2i_conn = conn->dd_data;
1346 bnx2i_conn->cls_conn = cls_conn;
1347 bnx2i_conn->hba = hba;
1348 /* 'ep' ptr will be assigned in bind() call */
1349 bnx2i_conn->ep = NULL;
1350 init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1352 if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1353 iscsi_conn_printk(KERN_ALERT, conn,
1354 "conn_new: login resc alloc failed!!\n");
1361 iscsi_conn_teardown(cls_conn);
1366 * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1367 * @cls_session: pointer to iscsi cls session
1368 * @cls_conn: pointer to iscsi cls conn
1369 * @transport_fd: 64-bit EP handle
1370 * @is_leading: leading connection on this session?
1372 * Binds together iSCSI session instance, iSCSI connection instance
1373 * and the TCP connection. This routine returns error code if
1374 * TCP connection does not belong on the device iSCSI sess/conn
1377 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1378 struct iscsi_cls_conn *cls_conn,
1379 uint64_t transport_fd, int is_leading)
1381 struct iscsi_conn *conn = cls_conn->dd_data;
1382 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1383 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1384 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1385 struct bnx2i_endpoint *bnx2i_ep;
1386 struct iscsi_endpoint *ep;
1389 ep = iscsi_lookup_endpoint(transport_fd);
1393 * Forcefully terminate all in progress connection recovery at the
1394 * earliest, either in bind(), send_pdu(LOGIN), or conn_start()
1396 if (bnx2i_adapter_ready(hba))
1399 bnx2i_ep = ep->dd_data;
1400 if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1401 (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1402 /* Peer disconnect via' FIN or RST */
1405 if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1408 if (bnx2i_ep->hba != hba) {
1409 /* Error - TCP connection does not belong to this device
1411 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1412 "conn bind, ep=0x%p (%s) does not",
1413 bnx2i_ep, bnx2i_ep->hba->netdev->name);
1414 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1415 "belong to hba (%s)\n",
1419 bnx2i_ep->conn = bnx2i_conn;
1420 bnx2i_conn->ep = bnx2i_ep;
1421 bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1422 bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1424 ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1425 bnx2i_ep->ep_iscsi_cid);
1427 /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1428 * driver needs to explicitly replenish RQ index during setup.
1430 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1431 bnx2i_put_rq_buf(bnx2i_conn, 0);
1433 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1439 * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1440 * @cls_conn: pointer to iscsi cls conn
1442 * Destroy an iSCSI connection instance and release memory resources held by
1445 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1447 struct iscsi_conn *conn = cls_conn->dd_data;
1448 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1449 struct Scsi_Host *shost;
1450 struct bnx2i_hba *hba;
1452 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1453 hba = iscsi_host_priv(shost);
1455 bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1456 iscsi_conn_teardown(cls_conn);
1461 * bnx2i_ep_get_param - return iscsi ep parameter to caller
1462 * @ep: pointer to iscsi endpoint
1463 * @param: parameter type identifier
1464 * @buf: buffer pointer
1466 * returns iSCSI ep parameters
1468 static int bnx2i_ep_get_param(struct iscsi_endpoint *ep,
1469 enum iscsi_param param, char *buf)
1471 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
1472 struct bnx2i_hba *hba = bnx2i_ep->hba;
1473 int len = -ENOTCONN;
1479 case ISCSI_PARAM_CONN_PORT:
1480 mutex_lock(&hba->net_dev_lock);
1481 if (bnx2i_ep->cm_sk)
1482 len = sprintf(buf, "%hu\n", bnx2i_ep->cm_sk->dst_port);
1483 mutex_unlock(&hba->net_dev_lock);
1485 case ISCSI_PARAM_CONN_ADDRESS:
1486 mutex_lock(&hba->net_dev_lock);
1487 if (bnx2i_ep->cm_sk)
1488 len = sprintf(buf, "%pI4\n", &bnx2i_ep->cm_sk->dst_ip);
1489 mutex_unlock(&hba->net_dev_lock);
1499 * bnx2i_host_get_param - returns host (adapter) related parameters
1500 * @shost: scsi host pointer
1501 * @param: parameter type identifier
1502 * @buf: buffer pointer
1504 static int bnx2i_host_get_param(struct Scsi_Host *shost,
1505 enum iscsi_host_param param, char *buf)
1507 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1511 case ISCSI_HOST_PARAM_HWADDRESS:
1512 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1514 case ISCSI_HOST_PARAM_NETDEV_NAME:
1515 len = sprintf(buf, "%s\n", hba->netdev->name);
1517 case ISCSI_HOST_PARAM_IPADDRESS: {
1518 struct list_head *active_list = &hba->ep_active_list;
1520 read_lock_bh(&hba->ep_rdwr_lock);
1521 if (!list_empty(&hba->ep_active_list)) {
1522 struct bnx2i_endpoint *bnx2i_ep;
1523 struct cnic_sock *csk;
1525 bnx2i_ep = list_first_entry(active_list,
1526 struct bnx2i_endpoint,
1528 csk = bnx2i_ep->cm_sk;
1529 if (test_bit(SK_F_IPV6, &csk->flags))
1530 len = sprintf(buf, "%pI6\n", csk->src_ip);
1532 len = sprintf(buf, "%pI4\n", csk->src_ip);
1534 read_unlock_bh(&hba->ep_rdwr_lock);
1538 return iscsi_host_get_param(shost, param, buf);
1544 * bnx2i_conn_start - completes iscsi connection migration to FFP
1545 * @cls_conn: pointer to iscsi cls conn
1547 * last call in FFP migration to handover iscsi conn to the driver
1549 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1551 struct iscsi_conn *conn = cls_conn->dd_data;
1552 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1554 bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1555 bnx2i_update_iscsi_conn(conn);
1558 * this should normally not sleep for a long time so it should
1559 * not disrupt the caller.
1561 bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1562 bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1563 bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
1564 add_timer(&bnx2i_conn->ep->ofld_timer);
1565 /* update iSCSI context for this conn, wait for CNIC to complete */
1566 wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1567 bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1569 if (signal_pending(current))
1570 flush_signals(current);
1571 del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1573 iscsi_conn_start(cls_conn);
1579 * bnx2i_conn_get_stats - returns iSCSI stats
1580 * @cls_conn: pointer to iscsi cls conn
1581 * @stats: pointer to iscsi statistic struct
1583 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1584 struct iscsi_stats *stats)
1586 struct iscsi_conn *conn = cls_conn->dd_data;
1588 stats->txdata_octets = conn->txdata_octets;
1589 stats->rxdata_octets = conn->rxdata_octets;
1590 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1591 stats->dataout_pdus = conn->dataout_pdus_cnt;
1592 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1593 stats->datain_pdus = conn->datain_pdus_cnt;
1594 stats->r2t_pdus = conn->r2t_pdus_cnt;
1595 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1596 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1597 stats->custom_length = 3;
1598 strcpy(stats->custom[2].desc, "eh_abort_cnt");
1599 stats->custom[2].value = conn->eh_abort_cnt;
1600 stats->digest_err = 0;
1601 stats->timeout_err = 0;
1602 stats->custom_length = 0;
1607 * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1608 * @dst_addr: target IP address
1610 * check if route resolves to BNX2 device
1612 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1614 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1615 struct bnx2i_hba *hba;
1616 struct cnic_dev *cnic = NULL;
1618 hba = get_adapter_list_head();
1619 if (hba && hba->cnic)
1620 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1622 printk(KERN_ALERT "bnx2i: no route,"
1623 "can't connect using cnic\n");
1626 hba = bnx2i_find_hba_for_cnic(cnic);
1630 if (bnx2i_adapter_ready(hba)) {
1631 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1634 if (hba->netdev->mtu > hba->mtu_supported) {
1635 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1636 hba->netdev->name, hba->netdev->mtu);
1637 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1638 hba->mtu_supported);
1648 * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1649 * @hba: pointer to adapter instance
1650 * @ep: endpoint (transport indentifier) structure
1652 * destroys cm_sock structure and on chip iscsi context
1654 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1655 struct bnx2i_endpoint *ep)
1657 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk)
1658 hba->cnic->cm_destroy(ep->cm_sk);
1660 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1661 ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1662 if (ep->conn && ep->conn->cls_conn &&
1663 ep->conn->cls_conn->dd_data) {
1664 struct iscsi_conn *conn = ep->conn->cls_conn->dd_data;
1666 /* Must suspend all rx queue activity for this ep */
1667 set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
1669 /* CONN_DISCONNECT timeout may or may not be an issue depending
1670 * on what transcribed in TCP layer, different targets behave
1673 printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, "
1674 "please submit GRC Dump, NW/PCIe trace, "
1675 "driver msgs to developers for analysis\n",
1679 ep->state = EP_STATE_CLEANUP_START;
1680 init_timer(&ep->ofld_timer);
1681 ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies;
1682 ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1683 ep->ofld_timer.data = (unsigned long) ep;
1684 add_timer(&ep->ofld_timer);
1686 bnx2i_ep_destroy_list_add(hba, ep);
1688 /* destroy iSCSI context, wait for it to complete */
1689 if (bnx2i_send_conn_destroy(hba, ep))
1690 ep->state = EP_STATE_CLEANUP_CMPL;
1692 wait_event_interruptible(ep->ofld_wait,
1693 (ep->state != EP_STATE_CLEANUP_START));
1695 if (signal_pending(current))
1696 flush_signals(current);
1697 del_timer_sync(&ep->ofld_timer);
1699 bnx2i_ep_destroy_list_del(hba, ep);
1701 if (ep->state != EP_STATE_CLEANUP_CMPL)
1702 /* should never happen */
1703 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1710 * bnx2i_ep_connect - establish TCP connection to target portal
1712 * @dst_addr: target IP address
1713 * @non_blocking: blocking or non-blocking call
1715 * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1716 * with l5_core and the CNIC. This is a multi-step process of resolving
1717 * route to target, create a iscsi connection context, handshaking with
1718 * CNIC module to create/initialize the socket struct and finally
1719 * sending down option-2 request to complete TCP 3-way handshake
1721 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1722 struct sockaddr *dst_addr,
1725 u32 iscsi_cid = BNX2I_CID_RESERVED;
1726 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1727 struct sockaddr_in6 *desti6;
1728 struct bnx2i_endpoint *bnx2i_ep;
1729 struct bnx2i_hba *hba;
1730 struct cnic_dev *cnic;
1731 struct cnic_sockaddr saddr;
1732 struct iscsi_endpoint *ep;
1736 /* driver is given scsi host to work with */
1737 hba = iscsi_host_priv(shost);
1740 * check if the given destination can be reached through
1741 * a iscsi capable NetXtreme2 device
1743 hba = bnx2i_check_route(dst_addr);
1749 mutex_lock(&hba->net_dev_lock);
1751 if (bnx2i_adapter_ready(hba) || !hba->cid_que.cid_free_cnt) {
1756 ep = bnx2i_alloc_ep(hba);
1761 bnx2i_ep = ep->dd_data;
1763 bnx2i_ep->num_active_cmds = 0;
1764 iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1765 if (iscsi_cid == -1) {
1766 printk(KERN_ALERT "bnx2i (%s): alloc_ep - unable to allocate "
1767 "iscsi cid\n", hba->netdev->name);
1772 bnx2i_ep->hba_age = hba->age;
1774 rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1776 printk(KERN_ALERT "bnx2i (%s): ep_conn - alloc QP resc error"
1777 "\n", hba->netdev->name);
1782 bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1783 bnx2i_ep->state = EP_STATE_OFLD_START;
1784 bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1786 init_timer(&bnx2i_ep->ofld_timer);
1787 bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1788 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1789 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1790 add_timer(&bnx2i_ep->ofld_timer);
1792 if (bnx2i_send_conn_ofld_req(hba, bnx2i_ep)) {
1793 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1794 printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1795 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1799 printk(KERN_ALERT "bnx2i (%s): unable to send conn offld kwqe"
1800 "\n", hba->netdev->name);
1801 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1805 /* Wait for CNIC hardware to setup conn context and return 'cid' */
1806 wait_event_interruptible(bnx2i_ep->ofld_wait,
1807 bnx2i_ep->state != EP_STATE_OFLD_START);
1809 if (signal_pending(current))
1810 flush_signals(current);
1811 del_timer_sync(&bnx2i_ep->ofld_timer);
1813 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1815 if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1816 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1817 printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1818 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1825 rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1826 iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1829 /* Need to terminate and cleanup the connection */
1833 bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1834 bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1835 clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1837 memset(&saddr, 0, sizeof(saddr));
1838 if (dst_addr->sa_family == AF_INET) {
1839 desti = (struct sockaddr_in *) dst_addr;
1840 saddr.remote.v4 = *desti;
1841 saddr.local.v4.sin_family = desti->sin_family;
1842 } else if (dst_addr->sa_family == AF_INET6) {
1843 desti6 = (struct sockaddr_in6 *) dst_addr;
1844 saddr.remote.v6 = *desti6;
1845 saddr.local.v6.sin6_family = desti6->sin6_family;
1848 bnx2i_ep->timestamp = jiffies;
1849 bnx2i_ep->state = EP_STATE_CONNECT_START;
1850 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1854 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1858 bnx2i_ep_active_list_add(hba, bnx2i_ep);
1860 if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
1863 mutex_unlock(&hba->net_dev_lock);
1867 bnx2i_ep_active_list_del(hba, bnx2i_ep);
1869 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1870 mutex_unlock(&hba->net_dev_lock);
1874 bnx2i_free_qp_resc(hba, bnx2i_ep);
1878 mutex_unlock(&hba->net_dev_lock);
1885 * bnx2i_ep_poll - polls for TCP connection establishement
1886 * @ep: TCP connection (endpoint) handle
1887 * @timeout_ms: timeout value in milli secs
1889 * polls for TCP connect request to complete
1891 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1893 struct bnx2i_endpoint *bnx2i_ep;
1896 bnx2i_ep = ep->dd_data;
1897 if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1898 (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1899 (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1901 if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1904 rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1905 ((bnx2i_ep->state ==
1906 EP_STATE_OFLD_FAILED) ||
1908 EP_STATE_CONNECT_FAILED) ||
1910 EP_STATE_CONNECT_COMPL)),
1911 msecs_to_jiffies(timeout_ms));
1912 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED)
1918 return 0; /* timeout */
1925 * bnx2i_ep_tcp_conn_active - check EP state transition
1926 * @ep: endpoint pointer
1928 * check if underlying TCP connection is active
1930 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1933 int cnic_dev_10g = 0;
1935 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1938 switch (bnx2i_ep->state) {
1939 case EP_STATE_CLEANUP_FAILED:
1940 case EP_STATE_OFLD_FAILED:
1941 case EP_STATE_DISCONN_TIMEDOUT:
1944 case EP_STATE_CONNECT_START:
1945 case EP_STATE_CONNECT_FAILED:
1946 case EP_STATE_CONNECT_COMPL:
1947 case EP_STATE_ULP_UPDATE_START:
1948 case EP_STATE_ULP_UPDATE_COMPL:
1949 case EP_STATE_TCP_FIN_RCVD:
1950 case EP_STATE_LOGOUT_SENT:
1951 case EP_STATE_LOGOUT_RESP_RCVD:
1952 case EP_STATE_ULP_UPDATE_FAILED:
1955 case EP_STATE_TCP_RST_RCVD:
1970 * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw
1971 * @ep: TCP connection (bnx2i endpoint) handle
1973 * executes TCP connection teardown process
1975 int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep)
1977 struct bnx2i_hba *hba = bnx2i_ep->hba;
1978 struct cnic_dev *cnic;
1979 struct iscsi_session *session = NULL;
1980 struct iscsi_conn *conn = NULL;
1992 if (bnx2i_ep->state == EP_STATE_IDLE ||
1993 bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
1996 if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
1999 if (bnx2i_ep->conn) {
2000 conn = bnx2i_ep->conn->cls_conn->dd_data;
2001 session = conn->session;
2004 init_timer(&bnx2i_ep->ofld_timer);
2005 bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies;
2006 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
2007 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
2008 add_timer(&bnx2i_ep->ofld_timer);
2010 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
2014 spin_lock_bh(&session->lock);
2015 if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) {
2016 if (session->state == ISCSI_STATE_LOGGING_OUT) {
2017 if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) {
2018 /* Logout sent, but no resp */
2019 printk(KERN_ALERT "bnx2i (%s): WARNING"
2020 " logout response was not "
2022 bnx2i_ep->hba->netdev->name);
2023 } else if (bnx2i_ep->state ==
2024 EP_STATE_LOGOUT_RESP_RCVD)
2030 spin_unlock_bh(&session->lock);
2033 bnx2i_ep->state = EP_STATE_DISCONN_START;
2036 close_ret = cnic->cm_close(bnx2i_ep->cm_sk);
2038 close_ret = cnic->cm_abort(bnx2i_ep->cm_sk);
2041 printk(KERN_ALERT "bnx2i (%s): close/abort(%d) returned %d\n",
2042 bnx2i_ep->hba->netdev->name, close, close_ret);
2044 /* wait for option-2 conn teardown */
2045 wait_event_interruptible(bnx2i_ep->ofld_wait,
2046 bnx2i_ep->state != EP_STATE_DISCONN_START);
2048 if (signal_pending(current))
2049 flush_signals(current);
2050 del_timer_sync(&bnx2i_ep->ofld_timer);
2053 bnx2i_ep_active_list_del(hba, bnx2i_ep);
2054 if (bnx2i_tear_down_conn(hba, bnx2i_ep))
2057 bnx2i_ep->state = EP_STATE_IDLE;
2063 * bnx2i_ep_disconnect - executes TCP connection teardown process
2064 * @ep: TCP connection (iscsi endpoint) handle
2066 * executes TCP connection teardown process
2068 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
2070 struct bnx2i_endpoint *bnx2i_ep;
2071 struct bnx2i_conn *bnx2i_conn = NULL;
2072 struct iscsi_conn *conn = NULL;
2073 struct bnx2i_hba *hba;
2075 bnx2i_ep = ep->dd_data;
2077 /* driver should not attempt connection cleanup until TCP_CONNECT
2078 * completes either successfully or fails. Timeout is 9-secs, so
2079 * wait for it to complete
2081 while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
2082 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
2085 if (bnx2i_ep->conn) {
2086 bnx2i_conn = bnx2i_ep->conn;
2087 conn = bnx2i_conn->cls_conn->dd_data;
2088 iscsi_suspend_queue(conn);
2090 hba = bnx2i_ep->hba;
2092 mutex_lock(&hba->net_dev_lock);
2094 if (bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2097 if (bnx2i_ep->state == EP_STATE_IDLE)
2100 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
2101 (bnx2i_ep->hba_age != hba->age)) {
2102 bnx2i_ep_active_list_del(hba, bnx2i_ep);
2106 /* Do all chip cleanup here */
2107 if (bnx2i_hw_ep_disconnect(bnx2i_ep)) {
2108 mutex_unlock(&hba->net_dev_lock);
2112 bnx2i_free_qp_resc(hba, bnx2i_ep);
2115 bnx2i_conn->ep = NULL;
2119 mutex_unlock(&hba->net_dev_lock);
2121 wake_up_interruptible(&hba->eh_wait);
2126 * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
2127 * @buf: pointer to buffer containing iscsi path message
2130 static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
2132 struct bnx2i_hba *hba = iscsi_host_priv(shost);
2133 char *buf = (char *) params;
2134 u16 len = sizeof(*params);
2136 /* handled by cnic driver */
2137 hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
2145 * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
2146 * used while registering with the scsi host and iSCSI transport module.
2148 static struct scsi_host_template bnx2i_host_template = {
2149 .module = THIS_MODULE,
2150 .name = "Broadcom Offload iSCSI Initiator",
2151 .proc_name = "bnx2i",
2152 .queuecommand = iscsi_queuecommand,
2153 .eh_abort_handler = iscsi_eh_abort,
2154 .eh_device_reset_handler = iscsi_eh_device_reset,
2155 .eh_target_reset_handler = iscsi_eh_recover_target,
2156 .change_queue_depth = iscsi_change_queue_depth,
2161 .use_clustering = ENABLE_CLUSTERING,
2162 .sg_tablesize = ISCSI_MAX_BDS_PER_CMD,
2163 .shost_attrs = bnx2i_dev_attributes,
2166 struct iscsi_transport bnx2i_iscsi_transport = {
2167 .owner = THIS_MODULE,
2169 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST |
2170 CAP_MULTI_R2T | CAP_DATADGST |
2171 CAP_DATA_PATH_OFFLOAD |
2173 .param_mask = ISCSI_MAX_RECV_DLENGTH |
2174 ISCSI_MAX_XMIT_DLENGTH |
2177 ISCSI_INITIAL_R2T_EN |
2182 ISCSI_PDU_INORDER_EN |
2183 ISCSI_DATASEQ_INORDER_EN |
2186 ISCSI_CONN_ADDRESS |
2188 ISCSI_PERSISTENT_PORT |
2189 ISCSI_PERSISTENT_ADDRESS |
2190 ISCSI_TARGET_NAME | ISCSI_TPGT |
2191 ISCSI_USERNAME | ISCSI_PASSWORD |
2192 ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
2193 ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
2194 ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO |
2195 ISCSI_PING_TMO | ISCSI_RECV_TMO |
2196 ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
2197 .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
2198 ISCSI_HOST_NETDEV_NAME,
2199 .create_session = bnx2i_session_create,
2200 .destroy_session = bnx2i_session_destroy,
2201 .create_conn = bnx2i_conn_create,
2202 .bind_conn = bnx2i_conn_bind,
2203 .destroy_conn = bnx2i_conn_destroy,
2204 .set_param = iscsi_set_param,
2205 .get_conn_param = iscsi_conn_get_param,
2206 .get_session_param = iscsi_session_get_param,
2207 .get_host_param = bnx2i_host_get_param,
2208 .start_conn = bnx2i_conn_start,
2209 .stop_conn = iscsi_conn_stop,
2210 .send_pdu = iscsi_conn_send_pdu,
2211 .xmit_task = bnx2i_task_xmit,
2212 .get_stats = bnx2i_conn_get_stats,
2213 /* TCP connect - disconnect - option-2 interface calls */
2214 .get_ep_param = bnx2i_ep_get_param,
2215 .ep_connect = bnx2i_ep_connect,
2216 .ep_poll = bnx2i_ep_poll,
2217 .ep_disconnect = bnx2i_ep_disconnect,
2218 .set_path = bnx2i_nl_set_path,
2219 /* Error recovery timeout call */
2220 .session_recovery_timedout = iscsi_session_recovery_timedout,
2221 .cleanup_task = bnx2i_cleanup_task,