1de909d87SChad Dupuis /* bnx2fc_io.c: QLogic Linux FCoE offload driver.
2853e2bd2SBhanu Gollapudi * IO manager and SCSI IO processing.
3853e2bd2SBhanu Gollapudi *
4cf122191SBhanu Prakash Gollapudi * Copyright (c) 2008-2013 Broadcom Corporation
521144b80SChad Dupuis * Copyright (c) 2014-2016 QLogic Corporation
621144b80SChad Dupuis * Copyright (c) 2016-2017 Cavium Inc.
7853e2bd2SBhanu Gollapudi *
8853e2bd2SBhanu Gollapudi * This program is free software; you can redistribute it and/or modify
9853e2bd2SBhanu Gollapudi * it under the terms of the GNU General Public License as published by
10853e2bd2SBhanu Gollapudi * the Free Software Foundation.
11853e2bd2SBhanu Gollapudi *
12853e2bd2SBhanu Gollapudi * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com)
13853e2bd2SBhanu Gollapudi */
14853e2bd2SBhanu Gollapudi
15853e2bd2SBhanu Gollapudi #include "bnx2fc.h"
160ea5c275SBhanu Gollapudi
170ea5c275SBhanu Gollapudi #define RESERVE_FREE_LIST_INDEX num_possible_cpus()
180ea5c275SBhanu Gollapudi
19853e2bd2SBhanu Gollapudi static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
20853e2bd2SBhanu Gollapudi int bd_index);
21853e2bd2SBhanu Gollapudi static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req);
22822f2903SBhanu Prakash Gollapudi static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req);
23853e2bd2SBhanu Gollapudi static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req);
24853e2bd2SBhanu Gollapudi static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req);
25853e2bd2SBhanu Gollapudi static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
26853e2bd2SBhanu Gollapudi struct fcoe_fcp_rsp_payload *fcp_rsp,
2777331115SJaved Hasan u8 num_rq, unsigned char *rq_data);
28853e2bd2SBhanu Gollapudi
bnx2fc_cmd_timer_set(struct bnx2fc_cmd * io_req,unsigned int timer_msec)29853e2bd2SBhanu Gollapudi void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req,
30853e2bd2SBhanu Gollapudi unsigned int timer_msec)
31853e2bd2SBhanu Gollapudi {
32aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = io_req->port->priv;
33853e2bd2SBhanu Gollapudi
34aea71a02SBhanu Prakash Gollapudi if (queue_delayed_work(interface->timer_work_queue,
35aea71a02SBhanu Prakash Gollapudi &io_req->timeout_work,
36853e2bd2SBhanu Gollapudi msecs_to_jiffies(timer_msec)))
37853e2bd2SBhanu Gollapudi kref_get(&io_req->refcount);
38853e2bd2SBhanu Gollapudi }
39853e2bd2SBhanu Gollapudi
bnx2fc_cmd_timeout(struct work_struct * work)40853e2bd2SBhanu Gollapudi static void bnx2fc_cmd_timeout(struct work_struct *work)
41853e2bd2SBhanu Gollapudi {
42853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req = container_of(work, struct bnx2fc_cmd,
43853e2bd2SBhanu Gollapudi timeout_work.work);
44853e2bd2SBhanu Gollapudi u8 cmd_type = io_req->cmd_type;
45853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt;
46853e2bd2SBhanu Gollapudi int rc;
47853e2bd2SBhanu Gollapudi
48853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "cmd_timeout, cmd_type = %d,"
49853e2bd2SBhanu Gollapudi "req_flags = %lx\n", cmd_type, io_req->req_flags);
50853e2bd2SBhanu Gollapudi
51853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock);
52853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags)) {
53853e2bd2SBhanu Gollapudi clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);
54853e2bd2SBhanu Gollapudi /*
55853e2bd2SBhanu Gollapudi * ideally we should hold the io_req until RRQ complets,
56853e2bd2SBhanu Gollapudi * and release io_req from timeout hold.
57853e2bd2SBhanu Gollapudi */
58853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock);
59853e2bd2SBhanu Gollapudi bnx2fc_send_rrq(io_req);
60853e2bd2SBhanu Gollapudi return;
61853e2bd2SBhanu Gollapudi }
62853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags)) {
63853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "IO ready for reuse now\n");
64853e2bd2SBhanu Gollapudi goto done;
65853e2bd2SBhanu Gollapudi }
66853e2bd2SBhanu Gollapudi
67853e2bd2SBhanu Gollapudi switch (cmd_type) {
68853e2bd2SBhanu Gollapudi case BNX2FC_SCSI_CMD:
69853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
70853e2bd2SBhanu Gollapudi &io_req->req_flags)) {
71853e2bd2SBhanu Gollapudi /* Handle eh_abort timeout */
72853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "eh_abort timed out\n");
730e0fcef9SSaurav Kashyap complete(&io_req->abts_done);
74853e2bd2SBhanu Gollapudi } else if (test_bit(BNX2FC_FLAG_ISSUE_ABTS,
75853e2bd2SBhanu Gollapudi &io_req->req_flags)) {
76853e2bd2SBhanu Gollapudi /* Handle internally generated ABTS timeout */
77853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ABTS timed out refcnt = %d\n",
782c935bc5SPeter Zijlstra kref_read(&io_req->refcount));
79853e2bd2SBhanu Gollapudi if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
80853e2bd2SBhanu Gollapudi &io_req->req_flags))) {
8150a87414SChad Dupuis /*
8250a87414SChad Dupuis * Cleanup and return original command to
8350a87414SChad Dupuis * mid-layer.
8450a87414SChad Dupuis */
8550a87414SChad Dupuis bnx2fc_initiate_cleanup(io_req);
86853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
87853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock);
88853e2bd2SBhanu Gollapudi
89853e2bd2SBhanu Gollapudi return;
90853e2bd2SBhanu Gollapudi }
91853e2bd2SBhanu Gollapudi } else {
92853e2bd2SBhanu Gollapudi /* Hanlde IO timeout */
93853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "IO timed out. issue ABTS\n");
94853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL,
95853e2bd2SBhanu Gollapudi &io_req->req_flags)) {
96853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "IO completed before "
97853e2bd2SBhanu Gollapudi " timer expiry\n");
98853e2bd2SBhanu Gollapudi goto done;
99853e2bd2SBhanu Gollapudi }
100853e2bd2SBhanu Gollapudi
101853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
102853e2bd2SBhanu Gollapudi &io_req->req_flags)) {
103853e2bd2SBhanu Gollapudi rc = bnx2fc_initiate_abts(io_req);
104853e2bd2SBhanu Gollapudi if (rc == SUCCESS)
105853e2bd2SBhanu Gollapudi goto done;
10650a87414SChad Dupuis
107853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
108853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock);
109853e2bd2SBhanu Gollapudi
110853e2bd2SBhanu Gollapudi return;
111853e2bd2SBhanu Gollapudi } else {
112853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "IO already in "
113853e2bd2SBhanu Gollapudi "ABTS processing\n");
114853e2bd2SBhanu Gollapudi }
115853e2bd2SBhanu Gollapudi }
116853e2bd2SBhanu Gollapudi break;
117853e2bd2SBhanu Gollapudi case BNX2FC_ELS:
118853e2bd2SBhanu Gollapudi
119853e2bd2SBhanu Gollapudi if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
120853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ABTS for ELS timed out\n");
121853e2bd2SBhanu Gollapudi
122853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
123853e2bd2SBhanu Gollapudi &io_req->req_flags)) {
124853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
125853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock);
126853e2bd2SBhanu Gollapudi
127853e2bd2SBhanu Gollapudi return;
128853e2bd2SBhanu Gollapudi }
129853e2bd2SBhanu Gollapudi } else {
130853e2bd2SBhanu Gollapudi /*
131853e2bd2SBhanu Gollapudi * Handle ELS timeout.
132853e2bd2SBhanu Gollapudi * tgt_lock is used to sync compl path and timeout
133853e2bd2SBhanu Gollapudi * path. If els compl path is processing this IO, we
134853e2bd2SBhanu Gollapudi * have nothing to do here, just release the timer hold
135853e2bd2SBhanu Gollapudi */
136853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ELS timed out\n");
137853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE,
138853e2bd2SBhanu Gollapudi &io_req->req_flags))
139853e2bd2SBhanu Gollapudi goto done;
140853e2bd2SBhanu Gollapudi
141853e2bd2SBhanu Gollapudi /* Indicate the cb_func that this ELS is timed out */
142853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_ELS_TIMEOUT, &io_req->req_flags);
143853e2bd2SBhanu Gollapudi
144853e2bd2SBhanu Gollapudi if ((io_req->cb_func) && (io_req->cb_arg)) {
145853e2bd2SBhanu Gollapudi io_req->cb_func(io_req->cb_arg);
146853e2bd2SBhanu Gollapudi io_req->cb_arg = NULL;
147853e2bd2SBhanu Gollapudi }
148853e2bd2SBhanu Gollapudi }
149853e2bd2SBhanu Gollapudi break;
150853e2bd2SBhanu Gollapudi default:
151853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "cmd_timeout: invalid cmd_type %d\n",
152853e2bd2SBhanu Gollapudi cmd_type);
153853e2bd2SBhanu Gollapudi break;
154853e2bd2SBhanu Gollapudi }
155853e2bd2SBhanu Gollapudi
156853e2bd2SBhanu Gollapudi done:
157853e2bd2SBhanu Gollapudi /* release the cmd that was held when timer was set */
158853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
159853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock);
160853e2bd2SBhanu Gollapudi }
161853e2bd2SBhanu Gollapudi
bnx2fc_scsi_done(struct bnx2fc_cmd * io_req,int err_code)162853e2bd2SBhanu Gollapudi static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code)
163853e2bd2SBhanu Gollapudi {
164853e2bd2SBhanu Gollapudi /* Called with host lock held */
165853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
166853e2bd2SBhanu Gollapudi
167853e2bd2SBhanu Gollapudi /*
168853e2bd2SBhanu Gollapudi * active_cmd_queue may have other command types as well,
169853e2bd2SBhanu Gollapudi * and during flush operation, we want to error back only
170853e2bd2SBhanu Gollapudi * scsi commands.
171853e2bd2SBhanu Gollapudi */
172853e2bd2SBhanu Gollapudi if (io_req->cmd_type != BNX2FC_SCSI_CMD)
173853e2bd2SBhanu Gollapudi return;
174853e2bd2SBhanu Gollapudi
175853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "scsi_done. err_code = 0x%x\n", err_code);
17674446954SBhanu Prakash Gollapudi if (test_bit(BNX2FC_FLAG_CMD_LOST, &io_req->req_flags)) {
17774446954SBhanu Prakash Gollapudi /* Do not call scsi done for this IO */
17874446954SBhanu Prakash Gollapudi return;
17974446954SBhanu Prakash Gollapudi }
18074446954SBhanu Prakash Gollapudi
181853e2bd2SBhanu Gollapudi bnx2fc_unmap_sg_list(io_req);
182853e2bd2SBhanu Gollapudi io_req->sc_cmd = NULL;
183d02327a8SChad Dupuis
184d02327a8SChad Dupuis /* Sanity checks before returning command to mid-layer */
185853e2bd2SBhanu Gollapudi if (!sc_cmd) {
186853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. "
187853e2bd2SBhanu Gollapudi "IO(0x%x) already cleaned up\n",
188853e2bd2SBhanu Gollapudi io_req->xid);
189853e2bd2SBhanu Gollapudi return;
190853e2bd2SBhanu Gollapudi }
191d02327a8SChad Dupuis if (!sc_cmd->device) {
192d02327a8SChad Dupuis pr_err(PFX "0x%x: sc_cmd->device is NULL.\n", io_req->xid);
193d02327a8SChad Dupuis return;
194d02327a8SChad Dupuis }
195d02327a8SChad Dupuis if (!sc_cmd->device->host) {
196d02327a8SChad Dupuis pr_err(PFX "0x%x: sc_cmd->device->host is NULL.\n",
197d02327a8SChad Dupuis io_req->xid);
198d02327a8SChad Dupuis return;
199d02327a8SChad Dupuis }
200d02327a8SChad Dupuis
201853e2bd2SBhanu Gollapudi sc_cmd->result = err_code << 16;
202853e2bd2SBhanu Gollapudi
203853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n",
204853e2bd2SBhanu Gollapudi sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries,
205853e2bd2SBhanu Gollapudi sc_cmd->allowed);
206853e2bd2SBhanu Gollapudi scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd));
207f4b4216fSBart Van Assche bnx2fc_priv(sc_cmd)->io_req = NULL;
208a75af82aSBart Van Assche scsi_done(sc_cmd);
209853e2bd2SBhanu Gollapudi }
210853e2bd2SBhanu Gollapudi
bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba * hba)2110eb43b4bSBhanu Prakash Gollapudi struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba)
212853e2bd2SBhanu Gollapudi {
213853e2bd2SBhanu Gollapudi struct bnx2fc_cmd_mgr *cmgr;
214853e2bd2SBhanu Gollapudi struct io_bdt *bdt_info;
215853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req;
216853e2bd2SBhanu Gollapudi size_t len;
217853e2bd2SBhanu Gollapudi u32 mem_size;
218853e2bd2SBhanu Gollapudi u16 xid;
219853e2bd2SBhanu Gollapudi int i;
2200ea5c275SBhanu Gollapudi int num_ios, num_pri_ios;
221853e2bd2SBhanu Gollapudi size_t bd_tbl_sz;
2220ea5c275SBhanu Gollapudi int arr_sz = num_possible_cpus() + 1;
2230eb43b4bSBhanu Prakash Gollapudi u16 min_xid = BNX2FC_MIN_XID;
2240eb43b4bSBhanu Prakash Gollapudi u16 max_xid = hba->max_xid;
225853e2bd2SBhanu Gollapudi
226853e2bd2SBhanu Gollapudi if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) {
227853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \
228853e2bd2SBhanu Gollapudi and max_xid 0x%x\n", min_xid, max_xid);
229853e2bd2SBhanu Gollapudi return NULL;
230853e2bd2SBhanu Gollapudi }
231853e2bd2SBhanu Gollapudi BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid);
232853e2bd2SBhanu Gollapudi
233853e2bd2SBhanu Gollapudi num_ios = max_xid - min_xid + 1;
234853e2bd2SBhanu Gollapudi len = (num_ios * (sizeof(struct bnx2fc_cmd *)));
235853e2bd2SBhanu Gollapudi len += sizeof(struct bnx2fc_cmd_mgr);
236853e2bd2SBhanu Gollapudi
237853e2bd2SBhanu Gollapudi cmgr = kzalloc(len, GFP_KERNEL);
238853e2bd2SBhanu Gollapudi if (!cmgr) {
239853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc cmgr\n");
240853e2bd2SBhanu Gollapudi return NULL;
241853e2bd2SBhanu Gollapudi }
242853e2bd2SBhanu Gollapudi
243b2d3492fSDan Carpenter cmgr->hba = hba;
2446396bb22SKees Cook cmgr->free_list = kcalloc(arr_sz, sizeof(*cmgr->free_list),
2456396bb22SKees Cook GFP_KERNEL);
246853e2bd2SBhanu Gollapudi if (!cmgr->free_list) {
247853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc free_list\n");
248853e2bd2SBhanu Gollapudi goto mem_err;
249853e2bd2SBhanu Gollapudi }
250853e2bd2SBhanu Gollapudi
2516396bb22SKees Cook cmgr->free_list_lock = kcalloc(arr_sz, sizeof(*cmgr->free_list_lock),
2526396bb22SKees Cook GFP_KERNEL);
253853e2bd2SBhanu Gollapudi if (!cmgr->free_list_lock) {
254853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc free_list_lock\n");
2559172b763SMaurizio Lombardi kfree(cmgr->free_list);
2569172b763SMaurizio Lombardi cmgr->free_list = NULL;
257853e2bd2SBhanu Gollapudi goto mem_err;
258853e2bd2SBhanu Gollapudi }
259853e2bd2SBhanu Gollapudi
260853e2bd2SBhanu Gollapudi cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1);
261853e2bd2SBhanu Gollapudi
2620ea5c275SBhanu Gollapudi for (i = 0; i < arr_sz; i++) {
263853e2bd2SBhanu Gollapudi INIT_LIST_HEAD(&cmgr->free_list[i]);
264853e2bd2SBhanu Gollapudi spin_lock_init(&cmgr->free_list_lock[i]);
265853e2bd2SBhanu Gollapudi }
266853e2bd2SBhanu Gollapudi
2670ea5c275SBhanu Gollapudi /*
2680ea5c275SBhanu Gollapudi * Pre-allocated pool of bnx2fc_cmds.
2690ea5c275SBhanu Gollapudi * Last entry in the free list array is the free list
2700ea5c275SBhanu Gollapudi * of slow path requests.
2710ea5c275SBhanu Gollapudi */
272853e2bd2SBhanu Gollapudi xid = BNX2FC_MIN_XID;
2730eb43b4bSBhanu Prakash Gollapudi num_pri_ios = num_ios - hba->elstm_xids;
274853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) {
275853e2bd2SBhanu Gollapudi io_req = kzalloc(sizeof(*io_req), GFP_KERNEL);
276853e2bd2SBhanu Gollapudi
277853e2bd2SBhanu Gollapudi if (!io_req) {
278853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc io_req\n");
279853e2bd2SBhanu Gollapudi goto mem_err;
280853e2bd2SBhanu Gollapudi }
281853e2bd2SBhanu Gollapudi
282853e2bd2SBhanu Gollapudi INIT_LIST_HEAD(&io_req->link);
283853e2bd2SBhanu Gollapudi INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout);
284853e2bd2SBhanu Gollapudi
285853e2bd2SBhanu Gollapudi io_req->xid = xid++;
2860ea5c275SBhanu Gollapudi if (i < num_pri_ios)
287853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link,
2880ea5c275SBhanu Gollapudi &cmgr->free_list[io_req->xid %
2890ea5c275SBhanu Gollapudi num_possible_cpus()]);
2900ea5c275SBhanu Gollapudi else
2910ea5c275SBhanu Gollapudi list_add_tail(&io_req->link,
2920ea5c275SBhanu Gollapudi &cmgr->free_list[num_possible_cpus()]);
293853e2bd2SBhanu Gollapudi io_req++;
294853e2bd2SBhanu Gollapudi }
295853e2bd2SBhanu Gollapudi
296853e2bd2SBhanu Gollapudi /* Allocate pool of io_bdts - one for each bnx2fc_cmd */
297853e2bd2SBhanu Gollapudi mem_size = num_ios * sizeof(struct io_bdt *);
298b2d3492fSDan Carpenter cmgr->io_bdt_pool = kzalloc(mem_size, GFP_KERNEL);
299853e2bd2SBhanu Gollapudi if (!cmgr->io_bdt_pool) {
300853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n");
301853e2bd2SBhanu Gollapudi goto mem_err;
302853e2bd2SBhanu Gollapudi }
303853e2bd2SBhanu Gollapudi
304853e2bd2SBhanu Gollapudi mem_size = sizeof(struct io_bdt);
305853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) {
306853e2bd2SBhanu Gollapudi cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL);
307853e2bd2SBhanu Gollapudi if (!cmgr->io_bdt_pool[i]) {
308853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc "
309853e2bd2SBhanu Gollapudi "io_bdt_pool[%d]\n", i);
310853e2bd2SBhanu Gollapudi goto mem_err;
311853e2bd2SBhanu Gollapudi }
312853e2bd2SBhanu Gollapudi }
313853e2bd2SBhanu Gollapudi
314853e2bd2SBhanu Gollapudi /* Allocate an map fcoe_bdt_ctx structures */
315853e2bd2SBhanu Gollapudi bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);
316853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) {
317853e2bd2SBhanu Gollapudi bdt_info = cmgr->io_bdt_pool[i];
318853e2bd2SBhanu Gollapudi bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
319853e2bd2SBhanu Gollapudi bd_tbl_sz,
320853e2bd2SBhanu Gollapudi &bdt_info->bd_tbl_dma,
321853e2bd2SBhanu Gollapudi GFP_KERNEL);
322853e2bd2SBhanu Gollapudi if (!bdt_info->bd_tbl) {
323853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "failed to alloc "
324853e2bd2SBhanu Gollapudi "bdt_tbl[%d]\n", i);
325853e2bd2SBhanu Gollapudi goto mem_err;
326853e2bd2SBhanu Gollapudi }
327853e2bd2SBhanu Gollapudi }
328853e2bd2SBhanu Gollapudi
329853e2bd2SBhanu Gollapudi return cmgr;
330853e2bd2SBhanu Gollapudi
331853e2bd2SBhanu Gollapudi mem_err:
332853e2bd2SBhanu Gollapudi bnx2fc_cmd_mgr_free(cmgr);
333853e2bd2SBhanu Gollapudi return NULL;
334853e2bd2SBhanu Gollapudi }
335853e2bd2SBhanu Gollapudi
bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr * cmgr)336853e2bd2SBhanu Gollapudi void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr)
337853e2bd2SBhanu Gollapudi {
338853e2bd2SBhanu Gollapudi struct io_bdt *bdt_info;
339853e2bd2SBhanu Gollapudi struct bnx2fc_hba *hba = cmgr->hba;
340853e2bd2SBhanu Gollapudi size_t bd_tbl_sz;
341853e2bd2SBhanu Gollapudi u16 min_xid = BNX2FC_MIN_XID;
3420eb43b4bSBhanu Prakash Gollapudi u16 max_xid = hba->max_xid;
343853e2bd2SBhanu Gollapudi int num_ios;
344853e2bd2SBhanu Gollapudi int i;
345853e2bd2SBhanu Gollapudi
346853e2bd2SBhanu Gollapudi num_ios = max_xid - min_xid + 1;
347853e2bd2SBhanu Gollapudi
348853e2bd2SBhanu Gollapudi /* Free fcoe_bdt_ctx structures */
349853e2bd2SBhanu Gollapudi if (!cmgr->io_bdt_pool)
350853e2bd2SBhanu Gollapudi goto free_cmd_pool;
351853e2bd2SBhanu Gollapudi
352853e2bd2SBhanu Gollapudi bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);
353853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) {
354853e2bd2SBhanu Gollapudi bdt_info = cmgr->io_bdt_pool[i];
355853e2bd2SBhanu Gollapudi if (bdt_info->bd_tbl) {
356853e2bd2SBhanu Gollapudi dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz,
357853e2bd2SBhanu Gollapudi bdt_info->bd_tbl,
358853e2bd2SBhanu Gollapudi bdt_info->bd_tbl_dma);
359853e2bd2SBhanu Gollapudi bdt_info->bd_tbl = NULL;
360853e2bd2SBhanu Gollapudi }
361853e2bd2SBhanu Gollapudi }
362853e2bd2SBhanu Gollapudi
363853e2bd2SBhanu Gollapudi /* Destroy io_bdt pool */
364853e2bd2SBhanu Gollapudi for (i = 0; i < num_ios; i++) {
365853e2bd2SBhanu Gollapudi kfree(cmgr->io_bdt_pool[i]);
366853e2bd2SBhanu Gollapudi cmgr->io_bdt_pool[i] = NULL;
367853e2bd2SBhanu Gollapudi }
368853e2bd2SBhanu Gollapudi
369853e2bd2SBhanu Gollapudi kfree(cmgr->io_bdt_pool);
370853e2bd2SBhanu Gollapudi cmgr->io_bdt_pool = NULL;
371853e2bd2SBhanu Gollapudi
372853e2bd2SBhanu Gollapudi free_cmd_pool:
373853e2bd2SBhanu Gollapudi kfree(cmgr->free_list_lock);
374853e2bd2SBhanu Gollapudi
375853e2bd2SBhanu Gollapudi /* Destroy cmd pool */
376853e2bd2SBhanu Gollapudi if (!cmgr->free_list)
377853e2bd2SBhanu Gollapudi goto free_cmgr;
378853e2bd2SBhanu Gollapudi
3790ea5c275SBhanu Gollapudi for (i = 0; i < num_possible_cpus() + 1; i++) {
380d71fb3bdSBhanu Prakash Gollapudi struct bnx2fc_cmd *tmp, *io_req;
381853e2bd2SBhanu Gollapudi
382d71fb3bdSBhanu Prakash Gollapudi list_for_each_entry_safe(io_req, tmp,
383d71fb3bdSBhanu Prakash Gollapudi &cmgr->free_list[i], link) {
384853e2bd2SBhanu Gollapudi list_del(&io_req->link);
385853e2bd2SBhanu Gollapudi kfree(io_req);
386853e2bd2SBhanu Gollapudi }
387853e2bd2SBhanu Gollapudi }
388853e2bd2SBhanu Gollapudi kfree(cmgr->free_list);
389853e2bd2SBhanu Gollapudi free_cmgr:
390853e2bd2SBhanu Gollapudi /* Free command manager itself */
391853e2bd2SBhanu Gollapudi kfree(cmgr);
392853e2bd2SBhanu Gollapudi }
393853e2bd2SBhanu Gollapudi
bnx2fc_elstm_alloc(struct bnx2fc_rport * tgt,int type)394853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type)
395853e2bd2SBhanu Gollapudi {
396853e2bd2SBhanu Gollapudi struct fcoe_port *port = tgt->port;
397aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = port->priv;
398aea71a02SBhanu Prakash Gollapudi struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr;
399853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req;
400853e2bd2SBhanu Gollapudi struct list_head *listp;
401853e2bd2SBhanu Gollapudi struct io_bdt *bd_tbl;
4020ea5c275SBhanu Gollapudi int index = RESERVE_FREE_LIST_INDEX;
403619c5cb6SVlad Zolotarov u32 free_sqes;
404853e2bd2SBhanu Gollapudi u32 max_sqes;
405853e2bd2SBhanu Gollapudi u16 xid;
406853e2bd2SBhanu Gollapudi
407853e2bd2SBhanu Gollapudi max_sqes = tgt->max_sqes;
408853e2bd2SBhanu Gollapudi switch (type) {
409853e2bd2SBhanu Gollapudi case BNX2FC_TASK_MGMT_CMD:
410853e2bd2SBhanu Gollapudi max_sqes = BNX2FC_TM_MAX_SQES;
411853e2bd2SBhanu Gollapudi break;
412853e2bd2SBhanu Gollapudi case BNX2FC_ELS:
413853e2bd2SBhanu Gollapudi max_sqes = BNX2FC_ELS_MAX_SQES;
414853e2bd2SBhanu Gollapudi break;
415853e2bd2SBhanu Gollapudi default:
416853e2bd2SBhanu Gollapudi break;
417853e2bd2SBhanu Gollapudi }
418853e2bd2SBhanu Gollapudi
419853e2bd2SBhanu Gollapudi /*
420853e2bd2SBhanu Gollapudi * NOTE: Free list insertions and deletions are protected with
421853e2bd2SBhanu Gollapudi * cmgr lock
422853e2bd2SBhanu Gollapudi */
4230ea5c275SBhanu Gollapudi spin_lock_bh(&cmd_mgr->free_list_lock[index]);
424619c5cb6SVlad Zolotarov free_sqes = atomic_read(&tgt->free_sqes);
4250ea5c275SBhanu Gollapudi if ((list_empty(&(cmd_mgr->free_list[index]))) ||
426619c5cb6SVlad Zolotarov (tgt->num_active_ios.counter >= max_sqes) ||
427619c5cb6SVlad Zolotarov (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) {
428853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available "
429853e2bd2SBhanu Gollapudi "ios(%d):sqes(%d)\n",
430853e2bd2SBhanu Gollapudi tgt->num_active_ios.counter, tgt->max_sqes);
4310ea5c275SBhanu Gollapudi if (list_empty(&(cmd_mgr->free_list[index])))
432853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "elstm_alloc: list_empty\n");
4330ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
434853e2bd2SBhanu Gollapudi return NULL;
435853e2bd2SBhanu Gollapudi }
436853e2bd2SBhanu Gollapudi
437853e2bd2SBhanu Gollapudi listp = (struct list_head *)
4380ea5c275SBhanu Gollapudi cmd_mgr->free_list[index].next;
439853e2bd2SBhanu Gollapudi list_del_init(listp);
440853e2bd2SBhanu Gollapudi io_req = (struct bnx2fc_cmd *) listp;
441853e2bd2SBhanu Gollapudi xid = io_req->xid;
442853e2bd2SBhanu Gollapudi cmd_mgr->cmds[xid] = io_req;
443853e2bd2SBhanu Gollapudi atomic_inc(&tgt->num_active_ios);
444619c5cb6SVlad Zolotarov atomic_dec(&tgt->free_sqes);
4450ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
446853e2bd2SBhanu Gollapudi
447853e2bd2SBhanu Gollapudi INIT_LIST_HEAD(&io_req->link);
448853e2bd2SBhanu Gollapudi
449853e2bd2SBhanu Gollapudi io_req->port = port;
450853e2bd2SBhanu Gollapudi io_req->cmd_mgr = cmd_mgr;
451853e2bd2SBhanu Gollapudi io_req->req_flags = 0;
452853e2bd2SBhanu Gollapudi io_req->cmd_type = type;
453853e2bd2SBhanu Gollapudi
454853e2bd2SBhanu Gollapudi /* Bind io_bdt for this io_req */
455853e2bd2SBhanu Gollapudi /* Have a static link between io_req and io_bdt_pool */
456853e2bd2SBhanu Gollapudi bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
457853e2bd2SBhanu Gollapudi bd_tbl->io_req = io_req;
458853e2bd2SBhanu Gollapudi
459853e2bd2SBhanu Gollapudi /* Hold the io_req against deletion */
460853e2bd2SBhanu Gollapudi kref_init(&io_req->refcount);
461853e2bd2SBhanu Gollapudi return io_req;
462853e2bd2SBhanu Gollapudi }
463aea71a02SBhanu Prakash Gollapudi
bnx2fc_cmd_alloc(struct bnx2fc_rport * tgt)464aea71a02SBhanu Prakash Gollapudi struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt)
465853e2bd2SBhanu Gollapudi {
466853e2bd2SBhanu Gollapudi struct fcoe_port *port = tgt->port;
467aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = port->priv;
468aea71a02SBhanu Prakash Gollapudi struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr;
469853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req;
470853e2bd2SBhanu Gollapudi struct list_head *listp;
471853e2bd2SBhanu Gollapudi struct io_bdt *bd_tbl;
472619c5cb6SVlad Zolotarov u32 free_sqes;
473853e2bd2SBhanu Gollapudi u32 max_sqes;
474853e2bd2SBhanu Gollapudi u16 xid;
475*20f8932fSSebastian Andrzej Siewior int index = raw_smp_processor_id();
476853e2bd2SBhanu Gollapudi
477853e2bd2SBhanu Gollapudi max_sqes = BNX2FC_SCSI_MAX_SQES;
478853e2bd2SBhanu Gollapudi /*
479853e2bd2SBhanu Gollapudi * NOTE: Free list insertions and deletions are protected with
480853e2bd2SBhanu Gollapudi * cmgr lock
481853e2bd2SBhanu Gollapudi */
4820ea5c275SBhanu Gollapudi spin_lock_bh(&cmd_mgr->free_list_lock[index]);
483619c5cb6SVlad Zolotarov free_sqes = atomic_read(&tgt->free_sqes);
4840ea5c275SBhanu Gollapudi if ((list_empty(&cmd_mgr->free_list[index])) ||
485619c5cb6SVlad Zolotarov (tgt->num_active_ios.counter >= max_sqes) ||
486619c5cb6SVlad Zolotarov (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) {
4870ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
488853e2bd2SBhanu Gollapudi return NULL;
489853e2bd2SBhanu Gollapudi }
490853e2bd2SBhanu Gollapudi
491853e2bd2SBhanu Gollapudi listp = (struct list_head *)
4920ea5c275SBhanu Gollapudi cmd_mgr->free_list[index].next;
493853e2bd2SBhanu Gollapudi list_del_init(listp);
494853e2bd2SBhanu Gollapudi io_req = (struct bnx2fc_cmd *) listp;
495853e2bd2SBhanu Gollapudi xid = io_req->xid;
496853e2bd2SBhanu Gollapudi cmd_mgr->cmds[xid] = io_req;
497853e2bd2SBhanu Gollapudi atomic_inc(&tgt->num_active_ios);
498619c5cb6SVlad Zolotarov atomic_dec(&tgt->free_sqes);
4990ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
500853e2bd2SBhanu Gollapudi
501853e2bd2SBhanu Gollapudi INIT_LIST_HEAD(&io_req->link);
502853e2bd2SBhanu Gollapudi
503853e2bd2SBhanu Gollapudi io_req->port = port;
504853e2bd2SBhanu Gollapudi io_req->cmd_mgr = cmd_mgr;
505853e2bd2SBhanu Gollapudi io_req->req_flags = 0;
506853e2bd2SBhanu Gollapudi
507853e2bd2SBhanu Gollapudi /* Bind io_bdt for this io_req */
508853e2bd2SBhanu Gollapudi /* Have a static link between io_req and io_bdt_pool */
509853e2bd2SBhanu Gollapudi bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
510853e2bd2SBhanu Gollapudi bd_tbl->io_req = io_req;
511853e2bd2SBhanu Gollapudi
512853e2bd2SBhanu Gollapudi /* Hold the io_req against deletion */
513853e2bd2SBhanu Gollapudi kref_init(&io_req->refcount);
514853e2bd2SBhanu Gollapudi return io_req;
515853e2bd2SBhanu Gollapudi }
516853e2bd2SBhanu Gollapudi
bnx2fc_cmd_release(struct kref * ref)517853e2bd2SBhanu Gollapudi void bnx2fc_cmd_release(struct kref *ref)
518853e2bd2SBhanu Gollapudi {
519853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req = container_of(ref,
520853e2bd2SBhanu Gollapudi struct bnx2fc_cmd, refcount);
521853e2bd2SBhanu Gollapudi struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr;
5220ea5c275SBhanu Gollapudi int index;
523853e2bd2SBhanu Gollapudi
5240ea5c275SBhanu Gollapudi if (io_req->cmd_type == BNX2FC_SCSI_CMD)
5250ea5c275SBhanu Gollapudi index = io_req->xid % num_possible_cpus();
5260ea5c275SBhanu Gollapudi else
5270ea5c275SBhanu Gollapudi index = RESERVE_FREE_LIST_INDEX;
5280ea5c275SBhanu Gollapudi
5290ea5c275SBhanu Gollapudi
5300ea5c275SBhanu Gollapudi spin_lock_bh(&cmd_mgr->free_list_lock[index]);
531853e2bd2SBhanu Gollapudi if (io_req->cmd_type != BNX2FC_SCSI_CMD)
532853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req);
533853e2bd2SBhanu Gollapudi cmd_mgr->cmds[io_req->xid] = NULL;
534853e2bd2SBhanu Gollapudi /* Delete IO from retire queue */
535853e2bd2SBhanu Gollapudi list_del_init(&io_req->link);
536853e2bd2SBhanu Gollapudi /* Add it to the free list */
537853e2bd2SBhanu Gollapudi list_add(&io_req->link,
5380ea5c275SBhanu Gollapudi &cmd_mgr->free_list[index]);
539853e2bd2SBhanu Gollapudi atomic_dec(&io_req->tgt->num_active_ios);
5400ea5c275SBhanu Gollapudi spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
5410ea5c275SBhanu Gollapudi
542853e2bd2SBhanu Gollapudi }
543853e2bd2SBhanu Gollapudi
bnx2fc_free_mp_resc(struct bnx2fc_cmd * io_req)544853e2bd2SBhanu Gollapudi static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req)
545853e2bd2SBhanu Gollapudi {
546853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *mp_req = &(io_req->mp_req);
547aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = io_req->port->priv;
548aea71a02SBhanu Prakash Gollapudi struct bnx2fc_hba *hba = interface->hba;
549853e2bd2SBhanu Gollapudi size_t sz = sizeof(struct fcoe_bd_ctx);
550853e2bd2SBhanu Gollapudi
551853e2bd2SBhanu Gollapudi /* clear tm flags */
552853e2bd2SBhanu Gollapudi mp_req->tm_flags = 0;
553853e2bd2SBhanu Gollapudi if (mp_req->mp_req_bd) {
554853e2bd2SBhanu Gollapudi dma_free_coherent(&hba->pcidev->dev, sz,
555853e2bd2SBhanu Gollapudi mp_req->mp_req_bd,
556853e2bd2SBhanu Gollapudi mp_req->mp_req_bd_dma);
557853e2bd2SBhanu Gollapudi mp_req->mp_req_bd = NULL;
558853e2bd2SBhanu Gollapudi }
559853e2bd2SBhanu Gollapudi if (mp_req->mp_resp_bd) {
560853e2bd2SBhanu Gollapudi dma_free_coherent(&hba->pcidev->dev, sz,
561853e2bd2SBhanu Gollapudi mp_req->mp_resp_bd,
562853e2bd2SBhanu Gollapudi mp_req->mp_resp_bd_dma);
563853e2bd2SBhanu Gollapudi mp_req->mp_resp_bd = NULL;
564853e2bd2SBhanu Gollapudi }
565853e2bd2SBhanu Gollapudi if (mp_req->req_buf) {
566be1fefc2SMichael Chan dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
567853e2bd2SBhanu Gollapudi mp_req->req_buf,
568853e2bd2SBhanu Gollapudi mp_req->req_buf_dma);
569853e2bd2SBhanu Gollapudi mp_req->req_buf = NULL;
570853e2bd2SBhanu Gollapudi }
571853e2bd2SBhanu Gollapudi if (mp_req->resp_buf) {
572be1fefc2SMichael Chan dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
573853e2bd2SBhanu Gollapudi mp_req->resp_buf,
574853e2bd2SBhanu Gollapudi mp_req->resp_buf_dma);
575853e2bd2SBhanu Gollapudi mp_req->resp_buf = NULL;
576853e2bd2SBhanu Gollapudi }
577853e2bd2SBhanu Gollapudi }
578853e2bd2SBhanu Gollapudi
bnx2fc_init_mp_req(struct bnx2fc_cmd * io_req)579853e2bd2SBhanu Gollapudi int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req)
580853e2bd2SBhanu Gollapudi {
581853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *mp_req;
582853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *mp_req_bd;
583853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *mp_resp_bd;
584aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = io_req->port->priv;
585aea71a02SBhanu Prakash Gollapudi struct bnx2fc_hba *hba = interface->hba;
586853e2bd2SBhanu Gollapudi dma_addr_t addr;
587853e2bd2SBhanu Gollapudi size_t sz;
588853e2bd2SBhanu Gollapudi
589853e2bd2SBhanu Gollapudi mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);
590853e2bd2SBhanu Gollapudi memset(mp_req, 0, sizeof(struct bnx2fc_mp_req));
591853e2bd2SBhanu Gollapudi
5921fffa199SChad Dupuis if (io_req->cmd_type != BNX2FC_ELS) {
593853e2bd2SBhanu Gollapudi mp_req->req_len = sizeof(struct fcp_cmnd);
594853e2bd2SBhanu Gollapudi io_req->data_xfer_len = mp_req->req_len;
5951fffa199SChad Dupuis } else
5961fffa199SChad Dupuis mp_req->req_len = io_req->data_xfer_len;
5971fffa199SChad Dupuis
598be1fefc2SMichael Chan mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
599853e2bd2SBhanu Gollapudi &mp_req->req_buf_dma,
600853e2bd2SBhanu Gollapudi GFP_ATOMIC);
601853e2bd2SBhanu Gollapudi if (!mp_req->req_buf) {
602853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "unable to alloc MP req buffer\n");
603853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req);
604853e2bd2SBhanu Gollapudi return FAILED;
605853e2bd2SBhanu Gollapudi }
606853e2bd2SBhanu Gollapudi
607be1fefc2SMichael Chan mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
608853e2bd2SBhanu Gollapudi &mp_req->resp_buf_dma,
609853e2bd2SBhanu Gollapudi GFP_ATOMIC);
610853e2bd2SBhanu Gollapudi if (!mp_req->resp_buf) {
611853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "unable to alloc TM resp buffer\n");
612853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req);
613853e2bd2SBhanu Gollapudi return FAILED;
614853e2bd2SBhanu Gollapudi }
615be1fefc2SMichael Chan memset(mp_req->req_buf, 0, CNIC_PAGE_SIZE);
616be1fefc2SMichael Chan memset(mp_req->resp_buf, 0, CNIC_PAGE_SIZE);
617853e2bd2SBhanu Gollapudi
618853e2bd2SBhanu Gollapudi /* Allocate and map mp_req_bd and mp_resp_bd */
619853e2bd2SBhanu Gollapudi sz = sizeof(struct fcoe_bd_ctx);
620853e2bd2SBhanu Gollapudi mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
621853e2bd2SBhanu Gollapudi &mp_req->mp_req_bd_dma,
622853e2bd2SBhanu Gollapudi GFP_ATOMIC);
623853e2bd2SBhanu Gollapudi if (!mp_req->mp_req_bd) {
624853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "unable to alloc MP req bd\n");
625853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req);
626853e2bd2SBhanu Gollapudi return FAILED;
627853e2bd2SBhanu Gollapudi }
628853e2bd2SBhanu Gollapudi mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
629853e2bd2SBhanu Gollapudi &mp_req->mp_resp_bd_dma,
630853e2bd2SBhanu Gollapudi GFP_ATOMIC);
631b0d5e15cSJulia Lawall if (!mp_req->mp_resp_bd) {
632853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "unable to alloc MP resp bd\n");
633853e2bd2SBhanu Gollapudi bnx2fc_free_mp_resc(io_req);
634853e2bd2SBhanu Gollapudi return FAILED;
635853e2bd2SBhanu Gollapudi }
636853e2bd2SBhanu Gollapudi /* Fill bd table */
637853e2bd2SBhanu Gollapudi addr = mp_req->req_buf_dma;
638853e2bd2SBhanu Gollapudi mp_req_bd = mp_req->mp_req_bd;
639853e2bd2SBhanu Gollapudi mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff;
640853e2bd2SBhanu Gollapudi mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32);
641be1fefc2SMichael Chan mp_req_bd->buf_len = CNIC_PAGE_SIZE;
642853e2bd2SBhanu Gollapudi mp_req_bd->flags = 0;
643853e2bd2SBhanu Gollapudi
644853e2bd2SBhanu Gollapudi /*
645853e2bd2SBhanu Gollapudi * MP buffer is either a task mgmt command or an ELS.
646853e2bd2SBhanu Gollapudi * So the assumption is that it consumes a single bd
647853e2bd2SBhanu Gollapudi * entry in the bd table
648853e2bd2SBhanu Gollapudi */
649853e2bd2SBhanu Gollapudi mp_resp_bd = mp_req->mp_resp_bd;
650853e2bd2SBhanu Gollapudi addr = mp_req->resp_buf_dma;
651853e2bd2SBhanu Gollapudi mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff;
652853e2bd2SBhanu Gollapudi mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32);
653be1fefc2SMichael Chan mp_resp_bd->buf_len = CNIC_PAGE_SIZE;
654853e2bd2SBhanu Gollapudi mp_resp_bd->flags = 0;
655853e2bd2SBhanu Gollapudi
656853e2bd2SBhanu Gollapudi return SUCCESS;
657853e2bd2SBhanu Gollapudi }
658853e2bd2SBhanu Gollapudi
bnx2fc_initiate_tmf(struct scsi_cmnd * sc_cmd,u8 tm_flags)659853e2bd2SBhanu Gollapudi static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags)
660853e2bd2SBhanu Gollapudi {
661853e2bd2SBhanu Gollapudi struct fc_lport *lport;
66233c7da05SJulia Lawall struct fc_rport *rport;
66333c7da05SJulia Lawall struct fc_rport_libfc_priv *rp;
664853e2bd2SBhanu Gollapudi struct fcoe_port *port;
665aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface;
666853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt;
667853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req;
668853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *tm_req;
669853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task;
670853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task_page;
671853e2bd2SBhanu Gollapudi struct Scsi_Host *host = sc_cmd->device->host;
672853e2bd2SBhanu Gollapudi struct fc_frame_header *fc_hdr;
673853e2bd2SBhanu Gollapudi struct fcp_cmnd *fcp_cmnd;
674853e2bd2SBhanu Gollapudi int task_idx, index;
675853e2bd2SBhanu Gollapudi int rc = SUCCESS;
676853e2bd2SBhanu Gollapudi u16 xid;
677853e2bd2SBhanu Gollapudi u32 sid, did;
678853e2bd2SBhanu Gollapudi unsigned long start = jiffies;
679853e2bd2SBhanu Gollapudi
680853e2bd2SBhanu Gollapudi lport = shost_priv(host);
68133c7da05SJulia Lawall rport = starget_to_rport(scsi_target(sc_cmd->device));
682853e2bd2SBhanu Gollapudi port = lport_priv(lport);
683aea71a02SBhanu Prakash Gollapudi interface = port->priv;
684853e2bd2SBhanu Gollapudi
685853e2bd2SBhanu Gollapudi if (rport == NULL) {
686b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "device_reset: rport is NULL\n");
687853e2bd2SBhanu Gollapudi rc = FAILED;
688853e2bd2SBhanu Gollapudi goto tmf_err;
689853e2bd2SBhanu Gollapudi }
69033c7da05SJulia Lawall rp = rport->dd_data;
691853e2bd2SBhanu Gollapudi
692853e2bd2SBhanu Gollapudi rc = fc_block_scsi_eh(sc_cmd);
693853e2bd2SBhanu Gollapudi if (rc)
694853e2bd2SBhanu Gollapudi return rc;
695853e2bd2SBhanu Gollapudi
696853e2bd2SBhanu Gollapudi if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
697853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "device_reset: link is not ready\n");
698853e2bd2SBhanu Gollapudi rc = FAILED;
699853e2bd2SBhanu Gollapudi goto tmf_err;
700853e2bd2SBhanu Gollapudi }
701853e2bd2SBhanu Gollapudi /* rport and tgt are allocated together, so tgt should be non-NULL */
702853e2bd2SBhanu Gollapudi tgt = (struct bnx2fc_rport *)&rp[1];
703853e2bd2SBhanu Gollapudi
704853e2bd2SBhanu Gollapudi if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) {
705853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "device_reset: tgt not offloaded\n");
706853e2bd2SBhanu Gollapudi rc = FAILED;
707853e2bd2SBhanu Gollapudi goto tmf_err;
708853e2bd2SBhanu Gollapudi }
709853e2bd2SBhanu Gollapudi retry_tmf:
710853e2bd2SBhanu Gollapudi io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD);
711853e2bd2SBhanu Gollapudi if (!io_req) {
712853e2bd2SBhanu Gollapudi if (time_after(jiffies, start + HZ)) {
713853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "tmf: Failed TMF");
714853e2bd2SBhanu Gollapudi rc = FAILED;
715853e2bd2SBhanu Gollapudi goto tmf_err;
716853e2bd2SBhanu Gollapudi }
717853e2bd2SBhanu Gollapudi msleep(20);
718853e2bd2SBhanu Gollapudi goto retry_tmf;
719853e2bd2SBhanu Gollapudi }
720853e2bd2SBhanu Gollapudi /* Initialize rest of io_req fields */
721853e2bd2SBhanu Gollapudi io_req->sc_cmd = sc_cmd;
722853e2bd2SBhanu Gollapudi io_req->port = port;
723853e2bd2SBhanu Gollapudi io_req->tgt = tgt;
724853e2bd2SBhanu Gollapudi
725853e2bd2SBhanu Gollapudi tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);
726853e2bd2SBhanu Gollapudi
727853e2bd2SBhanu Gollapudi rc = bnx2fc_init_mp_req(io_req);
728853e2bd2SBhanu Gollapudi if (rc == FAILED) {
729853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Task mgmt MP request init failed\n");
730bd4d5de8SBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock);
731853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
732bd4d5de8SBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock);
733853e2bd2SBhanu Gollapudi goto tmf_err;
734853e2bd2SBhanu Gollapudi }
735853e2bd2SBhanu Gollapudi
736853e2bd2SBhanu Gollapudi /* Set TM flags */
737853e2bd2SBhanu Gollapudi io_req->io_req_flags = 0;
738853e2bd2SBhanu Gollapudi tm_req->tm_flags = tm_flags;
739853e2bd2SBhanu Gollapudi
740853e2bd2SBhanu Gollapudi /* Fill FCP_CMND */
741853e2bd2SBhanu Gollapudi bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf);
742853e2bd2SBhanu Gollapudi fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf;
743853e2bd2SBhanu Gollapudi memset(fcp_cmnd->fc_cdb, 0, sc_cmd->cmd_len);
744853e2bd2SBhanu Gollapudi fcp_cmnd->fc_dl = 0;
745853e2bd2SBhanu Gollapudi
746853e2bd2SBhanu Gollapudi /* Fill FC header */
747853e2bd2SBhanu Gollapudi fc_hdr = &(tm_req->req_fc_hdr);
748853e2bd2SBhanu Gollapudi sid = tgt->sid;
749853e2bd2SBhanu Gollapudi did = rport->port_id;
750853e2bd2SBhanu Gollapudi __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid,
751853e2bd2SBhanu Gollapudi FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
752853e2bd2SBhanu Gollapudi FC_FC_SEQ_INIT, 0);
753853e2bd2SBhanu Gollapudi /* Obtain exchange id */
754853e2bd2SBhanu Gollapudi xid = io_req->xid;
755853e2bd2SBhanu Gollapudi
756853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid);
757853e2bd2SBhanu Gollapudi task_idx = xid/BNX2FC_TASKS_PER_PAGE;
758853e2bd2SBhanu Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE;
759853e2bd2SBhanu Gollapudi
760853e2bd2SBhanu Gollapudi /* Initialize task context for this IO request */
761aea71a02SBhanu Prakash Gollapudi task_page = (struct fcoe_task_ctx_entry *)
762aea71a02SBhanu Prakash Gollapudi interface->hba->task_ctx[task_idx];
763853e2bd2SBhanu Gollapudi task = &(task_page[index]);
764853e2bd2SBhanu Gollapudi bnx2fc_init_mp_task(io_req, task);
765853e2bd2SBhanu Gollapudi
766f4b4216fSBart Van Assche bnx2fc_priv(sc_cmd)->io_req = io_req;
767853e2bd2SBhanu Gollapudi
768853e2bd2SBhanu Gollapudi /* Obtain free SQ entry */
769853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock);
770853e2bd2SBhanu Gollapudi bnx2fc_add_2_sq(tgt, xid);
771853e2bd2SBhanu Gollapudi
772853e2bd2SBhanu Gollapudi /* Enqueue the io_req to active_tm_queue */
773853e2bd2SBhanu Gollapudi io_req->on_tmf_queue = 1;
774853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->active_tm_queue);
775853e2bd2SBhanu Gollapudi
7760e0fcef9SSaurav Kashyap init_completion(&io_req->abts_done);
7770e0fcef9SSaurav Kashyap io_req->wait_for_abts_comp = 1;
778853e2bd2SBhanu Gollapudi
779853e2bd2SBhanu Gollapudi /* Ring doorbell */
780853e2bd2SBhanu Gollapudi bnx2fc_ring_doorbell(tgt);
781853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock);
782853e2bd2SBhanu Gollapudi
7830e0fcef9SSaurav Kashyap rc = wait_for_completion_timeout(&io_req->abts_done,
78410755d3fSJoe Carnuccio interface->tm_timeout * HZ);
785853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock);
786853e2bd2SBhanu Gollapudi
7870e0fcef9SSaurav Kashyap io_req->wait_for_abts_comp = 0;
78892886c9cSBhanu Prakash Gollapudi if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) {
789853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags);
79092886c9cSBhanu Prakash Gollapudi if (io_req->on_tmf_queue) {
79192886c9cSBhanu Prakash Gollapudi list_del_init(&io_req->link);
79292886c9cSBhanu Prakash Gollapudi io_req->on_tmf_queue = 0;
79392886c9cSBhanu Prakash Gollapudi }
7940e0fcef9SSaurav Kashyap io_req->wait_for_cleanup_comp = 1;
7950e0fcef9SSaurav Kashyap init_completion(&io_req->cleanup_done);
79692886c9cSBhanu Prakash Gollapudi bnx2fc_initiate_cleanup(io_req);
79792886c9cSBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock);
7980e0fcef9SSaurav Kashyap rc = wait_for_completion_timeout(&io_req->cleanup_done,
79992886c9cSBhanu Prakash Gollapudi BNX2FC_FW_TIMEOUT);
80092886c9cSBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock);
8010e0fcef9SSaurav Kashyap io_req->wait_for_cleanup_comp = 0;
80292886c9cSBhanu Prakash Gollapudi if (!rc)
80392886c9cSBhanu Prakash Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
80492886c9cSBhanu Prakash Gollapudi }
805853e2bd2SBhanu Gollapudi
806853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock);
807853e2bd2SBhanu Gollapudi
808853e2bd2SBhanu Gollapudi if (!rc) {
809b2a554ffSBhanu Prakash Gollapudi BNX2FC_TGT_DBG(tgt, "task mgmt command failed...\n");
810853e2bd2SBhanu Gollapudi rc = FAILED;
811853e2bd2SBhanu Gollapudi } else {
812b2a554ffSBhanu Prakash Gollapudi BNX2FC_TGT_DBG(tgt, "task mgmt command success...\n");
813853e2bd2SBhanu Gollapudi rc = SUCCESS;
814853e2bd2SBhanu Gollapudi }
815853e2bd2SBhanu Gollapudi tmf_err:
816853e2bd2SBhanu Gollapudi return rc;
817853e2bd2SBhanu Gollapudi }
818853e2bd2SBhanu Gollapudi
bnx2fc_initiate_abts(struct bnx2fc_cmd * io_req)819853e2bd2SBhanu Gollapudi int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req)
820853e2bd2SBhanu Gollapudi {
821853e2bd2SBhanu Gollapudi struct fc_lport *lport;
822853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt;
823853e2bd2SBhanu Gollapudi struct fc_rport *rport = tgt->rport;
824853e2bd2SBhanu Gollapudi struct fc_rport_priv *rdata = tgt->rdata;
825aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface;
826853e2bd2SBhanu Gollapudi struct fcoe_port *port;
827853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *abts_io_req;
828853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task;
829853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task_page;
830853e2bd2SBhanu Gollapudi struct fc_frame_header *fc_hdr;
831853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *abts_req;
832853e2bd2SBhanu Gollapudi int task_idx, index;
833853e2bd2SBhanu Gollapudi u32 sid, did;
834853e2bd2SBhanu Gollapudi u16 xid;
835853e2bd2SBhanu Gollapudi int rc = SUCCESS;
836853e2bd2SBhanu Gollapudi u32 r_a_tov = rdata->r_a_tov;
837853e2bd2SBhanu Gollapudi
838853e2bd2SBhanu Gollapudi /* called with tgt_lock held */
839853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n");
840853e2bd2SBhanu Gollapudi
841853e2bd2SBhanu Gollapudi port = io_req->port;
842aea71a02SBhanu Prakash Gollapudi interface = port->priv;
843853e2bd2SBhanu Gollapudi lport = port->lport;
844853e2bd2SBhanu Gollapudi
845853e2bd2SBhanu Gollapudi if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
846853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n");
847853e2bd2SBhanu Gollapudi rc = FAILED;
848853e2bd2SBhanu Gollapudi goto abts_err;
849853e2bd2SBhanu Gollapudi }
850853e2bd2SBhanu Gollapudi
851853e2bd2SBhanu Gollapudi if (rport == NULL) {
852b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "initiate_abts: rport is NULL\n");
853853e2bd2SBhanu Gollapudi rc = FAILED;
854853e2bd2SBhanu Gollapudi goto abts_err;
855853e2bd2SBhanu Gollapudi }
856853e2bd2SBhanu Gollapudi
857853e2bd2SBhanu Gollapudi if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
858853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "initiate_abts: link is not ready\n");
859853e2bd2SBhanu Gollapudi rc = FAILED;
860853e2bd2SBhanu Gollapudi goto abts_err;
861853e2bd2SBhanu Gollapudi }
862853e2bd2SBhanu Gollapudi
863853e2bd2SBhanu Gollapudi abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS);
864853e2bd2SBhanu Gollapudi if (!abts_io_req) {
865886a0b54SColin Ian King printk(KERN_ERR PFX "abts: couldn't allocate cmd\n");
866853e2bd2SBhanu Gollapudi rc = FAILED;
867853e2bd2SBhanu Gollapudi goto abts_err;
868853e2bd2SBhanu Gollapudi }
869853e2bd2SBhanu Gollapudi
870853e2bd2SBhanu Gollapudi /* Initialize rest of io_req fields */
871853e2bd2SBhanu Gollapudi abts_io_req->sc_cmd = NULL;
872853e2bd2SBhanu Gollapudi abts_io_req->port = port;
873853e2bd2SBhanu Gollapudi abts_io_req->tgt = tgt;
874853e2bd2SBhanu Gollapudi abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */
875853e2bd2SBhanu Gollapudi
876853e2bd2SBhanu Gollapudi abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req);
877853e2bd2SBhanu Gollapudi memset(abts_req, 0, sizeof(struct bnx2fc_mp_req));
878853e2bd2SBhanu Gollapudi
879853e2bd2SBhanu Gollapudi /* Fill FC header */
880853e2bd2SBhanu Gollapudi fc_hdr = &(abts_req->req_fc_hdr);
881853e2bd2SBhanu Gollapudi
882853e2bd2SBhanu Gollapudi /* Obtain oxid and rxid for the original exchange to be aborted */
883853e2bd2SBhanu Gollapudi fc_hdr->fh_ox_id = htons(io_req->xid);
884619c5cb6SVlad Zolotarov fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id);
885853e2bd2SBhanu Gollapudi
886853e2bd2SBhanu Gollapudi sid = tgt->sid;
887853e2bd2SBhanu Gollapudi did = rport->port_id;
888853e2bd2SBhanu Gollapudi
889853e2bd2SBhanu Gollapudi __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid,
890853e2bd2SBhanu Gollapudi FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
891853e2bd2SBhanu Gollapudi FC_FC_SEQ_INIT, 0);
892853e2bd2SBhanu Gollapudi
893853e2bd2SBhanu Gollapudi xid = abts_io_req->xid;
894853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n");
895853e2bd2SBhanu Gollapudi task_idx = xid/BNX2FC_TASKS_PER_PAGE;
896853e2bd2SBhanu Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE;
897853e2bd2SBhanu Gollapudi
898853e2bd2SBhanu Gollapudi /* Initialize task context for this IO request */
899aea71a02SBhanu Prakash Gollapudi task_page = (struct fcoe_task_ctx_entry *)
900aea71a02SBhanu Prakash Gollapudi interface->hba->task_ctx[task_idx];
901853e2bd2SBhanu Gollapudi task = &(task_page[index]);
902853e2bd2SBhanu Gollapudi bnx2fc_init_mp_task(abts_io_req, task);
903853e2bd2SBhanu Gollapudi
904853e2bd2SBhanu Gollapudi /*
905853e2bd2SBhanu Gollapudi * ABTS task is a temporary task that will be cleaned up
906853e2bd2SBhanu Gollapudi * irrespective of ABTS response. We need to start the timer
907853e2bd2SBhanu Gollapudi * for the original exchange, as the CQE is posted for the original
908853e2bd2SBhanu Gollapudi * IO request.
909853e2bd2SBhanu Gollapudi *
910853e2bd2SBhanu Gollapudi * Timer for ABTS is started only when it is originated by a
911853e2bd2SBhanu Gollapudi * TM request. For the ABTS issued as part of ULP timeout,
912853e2bd2SBhanu Gollapudi * scsi-ml maintains the timers.
913853e2bd2SBhanu Gollapudi */
914853e2bd2SBhanu Gollapudi
915853e2bd2SBhanu Gollapudi /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/
916853e2bd2SBhanu Gollapudi bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov);
917853e2bd2SBhanu Gollapudi
918853e2bd2SBhanu Gollapudi /* Obtain free SQ entry */
919853e2bd2SBhanu Gollapudi bnx2fc_add_2_sq(tgt, xid);
920853e2bd2SBhanu Gollapudi
921853e2bd2SBhanu Gollapudi /* Ring doorbell */
922853e2bd2SBhanu Gollapudi bnx2fc_ring_doorbell(tgt);
923853e2bd2SBhanu Gollapudi
924853e2bd2SBhanu Gollapudi abts_err:
925853e2bd2SBhanu Gollapudi return rc;
926853e2bd2SBhanu Gollapudi }
927853e2bd2SBhanu Gollapudi
bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd * orig_io_req,u32 offset,enum fc_rctl r_ctl)9286c5a7ce4SBhanu Prakash Gollapudi int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset,
9296c5a7ce4SBhanu Prakash Gollapudi enum fc_rctl r_ctl)
9306c5a7ce4SBhanu Prakash Gollapudi {
9316c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_rport *tgt = orig_io_req->tgt;
9326c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_interface *interface;
9336c5a7ce4SBhanu Prakash Gollapudi struct fcoe_port *port;
9346c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_cmd *seq_clnp_req;
9356c5a7ce4SBhanu Prakash Gollapudi struct fcoe_task_ctx_entry *task;
9366c5a7ce4SBhanu Prakash Gollapudi struct fcoe_task_ctx_entry *task_page;
9376c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_els_cb_arg *cb_arg = NULL;
9386c5a7ce4SBhanu Prakash Gollapudi int task_idx, index;
9396c5a7ce4SBhanu Prakash Gollapudi u16 xid;
9406c5a7ce4SBhanu Prakash Gollapudi int rc = 0;
9416c5a7ce4SBhanu Prakash Gollapudi
9426c5a7ce4SBhanu Prakash Gollapudi BNX2FC_IO_DBG(orig_io_req, "bnx2fc_initiate_seq_cleanup xid = 0x%x\n",
9436c5a7ce4SBhanu Prakash Gollapudi orig_io_req->xid);
9446c5a7ce4SBhanu Prakash Gollapudi kref_get(&orig_io_req->refcount);
9456c5a7ce4SBhanu Prakash Gollapudi
9466c5a7ce4SBhanu Prakash Gollapudi port = orig_io_req->port;
9476c5a7ce4SBhanu Prakash Gollapudi interface = port->priv;
9486c5a7ce4SBhanu Prakash Gollapudi
9496c5a7ce4SBhanu Prakash Gollapudi cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
9506c5a7ce4SBhanu Prakash Gollapudi if (!cb_arg) {
9516c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n");
9526c5a7ce4SBhanu Prakash Gollapudi rc = -ENOMEM;
9536c5a7ce4SBhanu Prakash Gollapudi goto cleanup_err;
9546c5a7ce4SBhanu Prakash Gollapudi }
9556c5a7ce4SBhanu Prakash Gollapudi
9566c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP);
9576c5a7ce4SBhanu Prakash Gollapudi if (!seq_clnp_req) {
958886a0b54SColin Ian King printk(KERN_ERR PFX "cleanup: couldn't allocate cmd\n");
9596c5a7ce4SBhanu Prakash Gollapudi rc = -ENOMEM;
9606c5a7ce4SBhanu Prakash Gollapudi kfree(cb_arg);
9616c5a7ce4SBhanu Prakash Gollapudi goto cleanup_err;
9626c5a7ce4SBhanu Prakash Gollapudi }
9636c5a7ce4SBhanu Prakash Gollapudi /* Initialize rest of io_req fields */
9646c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->sc_cmd = NULL;
9656c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->port = port;
9666c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->tgt = tgt;
9676c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */
9686c5a7ce4SBhanu Prakash Gollapudi
9696c5a7ce4SBhanu Prakash Gollapudi xid = seq_clnp_req->xid;
9706c5a7ce4SBhanu Prakash Gollapudi
9716c5a7ce4SBhanu Prakash Gollapudi task_idx = xid/BNX2FC_TASKS_PER_PAGE;
9726c5a7ce4SBhanu Prakash Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE;
9736c5a7ce4SBhanu Prakash Gollapudi
9746c5a7ce4SBhanu Prakash Gollapudi /* Initialize task context for this IO request */
9756c5a7ce4SBhanu Prakash Gollapudi task_page = (struct fcoe_task_ctx_entry *)
9766c5a7ce4SBhanu Prakash Gollapudi interface->hba->task_ctx[task_idx];
9776c5a7ce4SBhanu Prakash Gollapudi task = &(task_page[index]);
9786c5a7ce4SBhanu Prakash Gollapudi cb_arg->aborted_io_req = orig_io_req;
9796c5a7ce4SBhanu Prakash Gollapudi cb_arg->io_req = seq_clnp_req;
9806c5a7ce4SBhanu Prakash Gollapudi cb_arg->r_ctl = r_ctl;
9816c5a7ce4SBhanu Prakash Gollapudi cb_arg->offset = offset;
9826c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->cb_arg = cb_arg;
9836c5a7ce4SBhanu Prakash Gollapudi
9846c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "call init_seq_cleanup_task\n");
9856c5a7ce4SBhanu Prakash Gollapudi bnx2fc_init_seq_cleanup_task(seq_clnp_req, task, orig_io_req, offset);
9866c5a7ce4SBhanu Prakash Gollapudi
9876c5a7ce4SBhanu Prakash Gollapudi /* Obtain free SQ entry */
9886c5a7ce4SBhanu Prakash Gollapudi bnx2fc_add_2_sq(tgt, xid);
9896c5a7ce4SBhanu Prakash Gollapudi
9906c5a7ce4SBhanu Prakash Gollapudi /* Ring doorbell */
9916c5a7ce4SBhanu Prakash Gollapudi bnx2fc_ring_doorbell(tgt);
9926c5a7ce4SBhanu Prakash Gollapudi cleanup_err:
9936c5a7ce4SBhanu Prakash Gollapudi return rc;
9946c5a7ce4SBhanu Prakash Gollapudi }
9956c5a7ce4SBhanu Prakash Gollapudi
bnx2fc_initiate_cleanup(struct bnx2fc_cmd * io_req)996853e2bd2SBhanu Gollapudi int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req)
997853e2bd2SBhanu Gollapudi {
998853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt;
999aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface;
1000853e2bd2SBhanu Gollapudi struct fcoe_port *port;
1001853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *cleanup_io_req;
1002853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task;
1003853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task_page;
1004853e2bd2SBhanu Gollapudi int task_idx, index;
1005853e2bd2SBhanu Gollapudi u16 xid, orig_xid;
1006853e2bd2SBhanu Gollapudi int rc = 0;
1007853e2bd2SBhanu Gollapudi
1008853e2bd2SBhanu Gollapudi /* ASSUMPTION: called with tgt_lock held */
1009853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n");
1010853e2bd2SBhanu Gollapudi
1011853e2bd2SBhanu Gollapudi port = io_req->port;
1012aea71a02SBhanu Prakash Gollapudi interface = port->priv;
1013853e2bd2SBhanu Gollapudi
1014853e2bd2SBhanu Gollapudi cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP);
1015853e2bd2SBhanu Gollapudi if (!cleanup_io_req) {
1016886a0b54SColin Ian King printk(KERN_ERR PFX "cleanup: couldn't allocate cmd\n");
1017853e2bd2SBhanu Gollapudi rc = -1;
1018853e2bd2SBhanu Gollapudi goto cleanup_err;
1019853e2bd2SBhanu Gollapudi }
1020853e2bd2SBhanu Gollapudi
1021853e2bd2SBhanu Gollapudi /* Initialize rest of io_req fields */
1022853e2bd2SBhanu Gollapudi cleanup_io_req->sc_cmd = NULL;
1023853e2bd2SBhanu Gollapudi cleanup_io_req->port = port;
1024853e2bd2SBhanu Gollapudi cleanup_io_req->tgt = tgt;
1025853e2bd2SBhanu Gollapudi cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */
1026853e2bd2SBhanu Gollapudi
1027853e2bd2SBhanu Gollapudi xid = cleanup_io_req->xid;
1028853e2bd2SBhanu Gollapudi
1029853e2bd2SBhanu Gollapudi task_idx = xid/BNX2FC_TASKS_PER_PAGE;
1030853e2bd2SBhanu Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE;
1031853e2bd2SBhanu Gollapudi
1032853e2bd2SBhanu Gollapudi /* Initialize task context for this IO request */
1033aea71a02SBhanu Prakash Gollapudi task_page = (struct fcoe_task_ctx_entry *)
1034aea71a02SBhanu Prakash Gollapudi interface->hba->task_ctx[task_idx];
1035853e2bd2SBhanu Gollapudi task = &(task_page[index]);
1036853e2bd2SBhanu Gollapudi orig_xid = io_req->xid;
1037853e2bd2SBhanu Gollapudi
1038853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid);
1039853e2bd2SBhanu Gollapudi
1040853e2bd2SBhanu Gollapudi bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid);
1041853e2bd2SBhanu Gollapudi
1042853e2bd2SBhanu Gollapudi /* Obtain free SQ entry */
1043853e2bd2SBhanu Gollapudi bnx2fc_add_2_sq(tgt, xid);
1044853e2bd2SBhanu Gollapudi
104525ad7394SSaurav Kashyap /* Set flag that cleanup request is pending with the firmware */
104625ad7394SSaurav Kashyap set_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags);
104725ad7394SSaurav Kashyap
1048853e2bd2SBhanu Gollapudi /* Ring doorbell */
1049853e2bd2SBhanu Gollapudi bnx2fc_ring_doorbell(tgt);
1050853e2bd2SBhanu Gollapudi
1051853e2bd2SBhanu Gollapudi cleanup_err:
1052853e2bd2SBhanu Gollapudi return rc;
1053853e2bd2SBhanu Gollapudi }
1054853e2bd2SBhanu Gollapudi
1055853e2bd2SBhanu Gollapudi /**
1056853e2bd2SBhanu Gollapudi * bnx2fc_eh_target_reset: Reset a target
1057853e2bd2SBhanu Gollapudi *
1058853e2bd2SBhanu Gollapudi * @sc_cmd: SCSI command
1059853e2bd2SBhanu Gollapudi *
1060853e2bd2SBhanu Gollapudi * Set from SCSI host template to send task mgmt command to the target
1061853e2bd2SBhanu Gollapudi * and wait for the response
1062853e2bd2SBhanu Gollapudi */
bnx2fc_eh_target_reset(struct scsi_cmnd * sc_cmd)1063853e2bd2SBhanu Gollapudi int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd)
1064853e2bd2SBhanu Gollapudi {
1065853e2bd2SBhanu Gollapudi return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET);
1066853e2bd2SBhanu Gollapudi }
1067853e2bd2SBhanu Gollapudi
1068853e2bd2SBhanu Gollapudi /**
1069853e2bd2SBhanu Gollapudi * bnx2fc_eh_device_reset - Reset a single LUN
1070853e2bd2SBhanu Gollapudi *
1071853e2bd2SBhanu Gollapudi * @sc_cmd: SCSI command
1072853e2bd2SBhanu Gollapudi *
1073853e2bd2SBhanu Gollapudi * Set from SCSI host template to send task mgmt command to the target
1074853e2bd2SBhanu Gollapudi * and wait for the response
1075853e2bd2SBhanu Gollapudi */
bnx2fc_eh_device_reset(struct scsi_cmnd * sc_cmd)1076853e2bd2SBhanu Gollapudi int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd)
1077853e2bd2SBhanu Gollapudi {
1078853e2bd2SBhanu Gollapudi return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET);
1079853e2bd2SBhanu Gollapudi }
1080853e2bd2SBhanu Gollapudi
bnx2fc_abts_cleanup(struct bnx2fc_cmd * io_req)10813f7d67daSBaoyou Xie static int bnx2fc_abts_cleanup(struct bnx2fc_cmd *io_req)
1082bc834e07SJules Irenge __must_hold(&tgt->tgt_lock)
1083c1bb4f33SBhanu Prakash Gollapudi {
1084c1bb4f33SBhanu Prakash Gollapudi struct bnx2fc_rport *tgt = io_req->tgt;
1085faae19beSChad Dupuis unsigned int time_left;
1086c1bb4f33SBhanu Prakash Gollapudi
10870e0fcef9SSaurav Kashyap init_completion(&io_req->cleanup_done);
10880e0fcef9SSaurav Kashyap io_req->wait_for_cleanup_comp = 1;
1089c1bb4f33SBhanu Prakash Gollapudi bnx2fc_initiate_cleanup(io_req);
1090c1bb4f33SBhanu Prakash Gollapudi
1091c1bb4f33SBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock);
1092c1bb4f33SBhanu Prakash Gollapudi
1093c1bb4f33SBhanu Prakash Gollapudi /*
1094faae19beSChad Dupuis * Can't wait forever on cleanup response lest we let the SCSI error
1095faae19beSChad Dupuis * handler wait forever
1096faae19beSChad Dupuis */
10970e0fcef9SSaurav Kashyap time_left = wait_for_completion_timeout(&io_req->cleanup_done,
1098faae19beSChad Dupuis BNX2FC_FW_TIMEOUT);
1099a92ac6eeSChad Dupuis if (!time_left) {
1100faae19beSChad Dupuis BNX2FC_IO_DBG(io_req, "%s(): Wait for cleanup timed out.\n",
1101faae19beSChad Dupuis __func__);
1102faae19beSChad Dupuis
1103faae19beSChad Dupuis /*
1104a92ac6eeSChad Dupuis * Put the extra reference to the SCSI command since it would
1105a92ac6eeSChad Dupuis * not have been returned in this case.
1106c1bb4f33SBhanu Prakash Gollapudi */
1107c1bb4f33SBhanu Prakash Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
1108a92ac6eeSChad Dupuis }
1109c1bb4f33SBhanu Prakash Gollapudi
1110c1bb4f33SBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock);
11110e0fcef9SSaurav Kashyap io_req->wait_for_cleanup_comp = 0;
11129e29a682SDing Xiang return SUCCESS;
1113c1bb4f33SBhanu Prakash Gollapudi }
1114faae19beSChad Dupuis
1115853e2bd2SBhanu Gollapudi /**
1116853e2bd2SBhanu Gollapudi * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding
1117853e2bd2SBhanu Gollapudi * SCSI command
1118853e2bd2SBhanu Gollapudi *
1119853e2bd2SBhanu Gollapudi * @sc_cmd: SCSI_ML command pointer
1120853e2bd2SBhanu Gollapudi *
1121853e2bd2SBhanu Gollapudi * SCSI abort request handler
1122853e2bd2SBhanu Gollapudi */
bnx2fc_eh_abort(struct scsi_cmnd * sc_cmd)1123853e2bd2SBhanu Gollapudi int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
1124853e2bd2SBhanu Gollapudi {
1125853e2bd2SBhanu Gollapudi struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
1126853e2bd2SBhanu Gollapudi struct fc_rport_libfc_priv *rp = rport->dd_data;
1127853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req;
1128853e2bd2SBhanu Gollapudi struct fc_lport *lport;
1129853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt;
1130617757deSMaurizio Lombardi int rc;
1131faae19beSChad Dupuis unsigned int time_left;
1132853e2bd2SBhanu Gollapudi
1133853e2bd2SBhanu Gollapudi rc = fc_block_scsi_eh(sc_cmd);
1134853e2bd2SBhanu Gollapudi if (rc)
1135853e2bd2SBhanu Gollapudi return rc;
1136853e2bd2SBhanu Gollapudi
1137853e2bd2SBhanu Gollapudi lport = shost_priv(sc_cmd->device->host);
1138853e2bd2SBhanu Gollapudi if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
1139b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "eh_abort: link not ready\n");
1140617757deSMaurizio Lombardi return FAILED;
1141853e2bd2SBhanu Gollapudi }
1142853e2bd2SBhanu Gollapudi
1143853e2bd2SBhanu Gollapudi tgt = (struct bnx2fc_rport *)&rp[1];
1144853e2bd2SBhanu Gollapudi
1145853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n");
1146853e2bd2SBhanu Gollapudi
1147853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock);
1148f4b4216fSBart Van Assche io_req = bnx2fc_priv(sc_cmd)->io_req;
1149853e2bd2SBhanu Gollapudi if (!io_req) {
1150853e2bd2SBhanu Gollapudi /* Command might have just completed */
1151853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "eh_abort: io_req is NULL\n");
1152853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock);
1153853e2bd2SBhanu Gollapudi return SUCCESS;
1154853e2bd2SBhanu Gollapudi }
1155853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n",
11562c935bc5SPeter Zijlstra kref_read(&io_req->refcount));
1157853e2bd2SBhanu Gollapudi
1158853e2bd2SBhanu Gollapudi /* Hold IO request across abort processing */
1159853e2bd2SBhanu Gollapudi kref_get(&io_req->refcount);
1160853e2bd2SBhanu Gollapudi
1161853e2bd2SBhanu Gollapudi BUG_ON(tgt != io_req->tgt);
1162853e2bd2SBhanu Gollapudi
1163853e2bd2SBhanu Gollapudi /* Remove the io_req from the active_q. */
1164853e2bd2SBhanu Gollapudi /*
1165853e2bd2SBhanu Gollapudi * Task Mgmt functions (LUN RESET & TGT RESET) will not
1166853e2bd2SBhanu Gollapudi * issue an ABTS on this particular IO req, as the
1167853e2bd2SBhanu Gollapudi * io_req is no longer in the active_q.
1168853e2bd2SBhanu Gollapudi */
1169853e2bd2SBhanu Gollapudi if (tgt->flush_in_prog) {
1170b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
1171853e2bd2SBhanu Gollapudi "flush in progress\n", io_req->xid);
1172853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
1173853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock);
1174853e2bd2SBhanu Gollapudi return SUCCESS;
1175853e2bd2SBhanu Gollapudi }
1176853e2bd2SBhanu Gollapudi
1177853e2bd2SBhanu Gollapudi if (io_req->on_active_queue == 0) {
1178b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
1179853e2bd2SBhanu Gollapudi "not on active_q\n", io_req->xid);
1180853e2bd2SBhanu Gollapudi /*
11815c63daf6SChad Dupuis * The IO is still with the FW.
11825c63daf6SChad Dupuis * Return failure and let SCSI-ml retry eh_abort.
1183853e2bd2SBhanu Gollapudi */
1184853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock);
11855c63daf6SChad Dupuis return FAILED;
1186853e2bd2SBhanu Gollapudi }
1187853e2bd2SBhanu Gollapudi
1188853e2bd2SBhanu Gollapudi /*
1189853e2bd2SBhanu Gollapudi * Only eh_abort processing will remove the IO from
1190853e2bd2SBhanu Gollapudi * active_cmd_q before processing the request. this is
1191853e2bd2SBhanu Gollapudi * done to avoid race conditions between IOs aborted
1192853e2bd2SBhanu Gollapudi * as part of task management completion and eh_abort
1193853e2bd2SBhanu Gollapudi * processing
1194853e2bd2SBhanu Gollapudi */
1195853e2bd2SBhanu Gollapudi list_del_init(&io_req->link);
1196853e2bd2SBhanu Gollapudi io_req->on_active_queue = 0;
1197853e2bd2SBhanu Gollapudi /* Move IO req to retire queue */
1198853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->io_retire_queue);
1199853e2bd2SBhanu Gollapudi
12000e0fcef9SSaurav Kashyap init_completion(&io_req->abts_done);
12010e0fcef9SSaurav Kashyap init_completion(&io_req->cleanup_done);
1202853e2bd2SBhanu Gollapudi
1203c1bb4f33SBhanu Prakash Gollapudi if (test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
1204b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
1205853e2bd2SBhanu Gollapudi "already in abts processing\n", io_req->xid);
120699cc600cSBhanu Prakash Gollapudi if (cancel_delayed_work(&io_req->timeout_work))
120799cc600cSBhanu Prakash Gollapudi kref_put(&io_req->refcount,
120899cc600cSBhanu Prakash Gollapudi bnx2fc_cmd_release); /* drop timer hold */
1209faae19beSChad Dupuis /*
1210faae19beSChad Dupuis * We don't want to hold off the upper layer timer so simply
1211faae19beSChad Dupuis * cleanup the command and return that I/O was successfully
1212faae19beSChad Dupuis * aborted.
1213faae19beSChad Dupuis */
121473b306a2SSeongJae Park bnx2fc_abts_cleanup(io_req);
121521837896SEddie Wai /* This only occurs when an task abort was requested while ABTS
121621837896SEddie Wai is in progress. Setting the IO_CLEANUP flag will skip the
121721837896SEddie Wai RRQ process in the case when the fw generated SCSI_CMD cmpl
121821837896SEddie Wai was a result from the ABTS request rather than the CLEANUP
121921837896SEddie Wai request */
122021837896SEddie Wai set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags);
1221122c81c5SJaved Hasan rc = FAILED;
1222faae19beSChad Dupuis goto done;
1223c1bb4f33SBhanu Prakash Gollapudi }
1224c1bb4f33SBhanu Prakash Gollapudi
1225c1bb4f33SBhanu Prakash Gollapudi /* Cancel the current timer running on this io_req */
1226c1bb4f33SBhanu Prakash Gollapudi if (cancel_delayed_work(&io_req->timeout_work))
1227c1bb4f33SBhanu Prakash Gollapudi kref_put(&io_req->refcount,
1228c1bb4f33SBhanu Prakash Gollapudi bnx2fc_cmd_release); /* drop timer hold */
1229c1bb4f33SBhanu Prakash Gollapudi set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags);
12300e0fcef9SSaurav Kashyap io_req->wait_for_abts_comp = 1;
1231c1bb4f33SBhanu Prakash Gollapudi rc = bnx2fc_initiate_abts(io_req);
1232c1bb4f33SBhanu Prakash Gollapudi if (rc == FAILED) {
12330e0fcef9SSaurav Kashyap io_req->wait_for_cleanup_comp = 1;
123499cc600cSBhanu Prakash Gollapudi bnx2fc_initiate_cleanup(io_req);
123599cc600cSBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock);
12360e0fcef9SSaurav Kashyap wait_for_completion(&io_req->cleanup_done);
123799cc600cSBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock);
12380e0fcef9SSaurav Kashyap io_req->wait_for_cleanup_comp = 0;
1239c1bb4f33SBhanu Prakash Gollapudi goto done;
1240853e2bd2SBhanu Gollapudi }
1241853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock);
1242853e2bd2SBhanu Gollapudi
1243faae19beSChad Dupuis /* Wait 2 * RA_TOV + 1 to be sure timeout function hasn't fired */
12440e0fcef9SSaurav Kashyap time_left = wait_for_completion_timeout(&io_req->abts_done,
124565309ef6SLaurence Oberman msecs_to_jiffies(2 * rp->r_a_tov + 1));
1246faae19beSChad Dupuis if (time_left)
12470e0fcef9SSaurav Kashyap BNX2FC_IO_DBG(io_req,
12480e0fcef9SSaurav Kashyap "Timed out in eh_abort waiting for abts_done");
1249853e2bd2SBhanu Gollapudi
1250853e2bd2SBhanu Gollapudi spin_lock_bh(&tgt->tgt_lock);
12510e0fcef9SSaurav Kashyap io_req->wait_for_abts_comp = 0;
12525d78f175SBhanu Prakash Gollapudi if (test_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) {
12535d78f175SBhanu Prakash Gollapudi BNX2FC_IO_DBG(io_req, "IO completed in a different context\n");
12545d78f175SBhanu Prakash Gollapudi rc = SUCCESS;
12555d78f175SBhanu Prakash Gollapudi } else if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
1256853e2bd2SBhanu Gollapudi &io_req->req_flags))) {
1257853e2bd2SBhanu Gollapudi /* Let the scsi-ml try to recover this command */
1258853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "abort failed, xid = 0x%x\n",
1259853e2bd2SBhanu Gollapudi io_req->xid);
1260faae19beSChad Dupuis /*
1261faae19beSChad Dupuis * Cleanup firmware residuals before returning control back
1262faae19beSChad Dupuis * to SCSI ML.
1263faae19beSChad Dupuis */
126450a87414SChad Dupuis rc = bnx2fc_abts_cleanup(io_req);
1265faae19beSChad Dupuis goto done;
1266853e2bd2SBhanu Gollapudi } else {
1267853e2bd2SBhanu Gollapudi /*
1268853e2bd2SBhanu Gollapudi * We come here even when there was a race condition
1269853e2bd2SBhanu Gollapudi * between timeout and abts completion, and abts
1270853e2bd2SBhanu Gollapudi * completion happens just in time.
1271853e2bd2SBhanu Gollapudi */
1272853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "abort succeeded\n");
1273853e2bd2SBhanu Gollapudi rc = SUCCESS;
1274853e2bd2SBhanu Gollapudi bnx2fc_scsi_done(io_req, DID_ABORT);
1275853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
1276853e2bd2SBhanu Gollapudi }
1277c1bb4f33SBhanu Prakash Gollapudi done:
1278853e2bd2SBhanu Gollapudi /* release the reference taken in eh_abort */
1279853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
1280853e2bd2SBhanu Gollapudi spin_unlock_bh(&tgt->tgt_lock);
1281853e2bd2SBhanu Gollapudi return rc;
1282853e2bd2SBhanu Gollapudi }
1283853e2bd2SBhanu Gollapudi
bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd * seq_clnp_req,struct fcoe_task_ctx_entry * task,u8 rx_state)12846c5a7ce4SBhanu Prakash Gollapudi void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req,
12856c5a7ce4SBhanu Prakash Gollapudi struct fcoe_task_ctx_entry *task,
12866c5a7ce4SBhanu Prakash Gollapudi u8 rx_state)
12876c5a7ce4SBhanu Prakash Gollapudi {
12886c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg;
12896c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req;
12906c5a7ce4SBhanu Prakash Gollapudi u32 offset = cb_arg->offset;
12916c5a7ce4SBhanu Prakash Gollapudi enum fc_rctl r_ctl = cb_arg->r_ctl;
12926c5a7ce4SBhanu Prakash Gollapudi int rc = 0;
12936c5a7ce4SBhanu Prakash Gollapudi struct bnx2fc_rport *tgt = orig_io_req->tgt;
12946c5a7ce4SBhanu Prakash Gollapudi
12956c5a7ce4SBhanu Prakash Gollapudi BNX2FC_IO_DBG(orig_io_req, "Entered process_cleanup_compl xid = 0x%x"
12966c5a7ce4SBhanu Prakash Gollapudi "cmd_type = %d\n",
12976c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->xid, seq_clnp_req->cmd_type);
12986c5a7ce4SBhanu Prakash Gollapudi
12996c5a7ce4SBhanu Prakash Gollapudi if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) {
13006c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n",
13016c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->xid);
13026c5a7ce4SBhanu Prakash Gollapudi goto free_cb_arg;
13036c5a7ce4SBhanu Prakash Gollapudi }
13046c5a7ce4SBhanu Prakash Gollapudi
13056c5a7ce4SBhanu Prakash Gollapudi spin_unlock_bh(&tgt->tgt_lock);
13066c5a7ce4SBhanu Prakash Gollapudi rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl);
13076c5a7ce4SBhanu Prakash Gollapudi spin_lock_bh(&tgt->tgt_lock);
13086c5a7ce4SBhanu Prakash Gollapudi
13096c5a7ce4SBhanu Prakash Gollapudi if (rc)
13106c5a7ce4SBhanu Prakash Gollapudi printk(KERN_ERR PFX "clnup_compl: Unable to send SRR"
13116c5a7ce4SBhanu Prakash Gollapudi " IO will abort\n");
13126c5a7ce4SBhanu Prakash Gollapudi seq_clnp_req->cb_arg = NULL;
13136c5a7ce4SBhanu Prakash Gollapudi kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
13146c5a7ce4SBhanu Prakash Gollapudi free_cb_arg:
13156c5a7ce4SBhanu Prakash Gollapudi kfree(cb_arg);
13166c5a7ce4SBhanu Prakash Gollapudi return;
13176c5a7ce4SBhanu Prakash Gollapudi }
13186c5a7ce4SBhanu Prakash Gollapudi
bnx2fc_process_cleanup_compl(struct bnx2fc_cmd * io_req,struct fcoe_task_ctx_entry * task,u8 num_rq)1319853e2bd2SBhanu Gollapudi void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req,
1320853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task,
1321853e2bd2SBhanu Gollapudi u8 num_rq)
1322853e2bd2SBhanu Gollapudi {
1323853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl "
1324853e2bd2SBhanu Gollapudi "refcnt = %d, cmd_type = %d\n",
13252c935bc5SPeter Zijlstra kref_read(&io_req->refcount), io_req->cmd_type);
132625ad7394SSaurav Kashyap /*
132725ad7394SSaurav Kashyap * Test whether there is a cleanup request pending. If not just
132825ad7394SSaurav Kashyap * exit.
132925ad7394SSaurav Kashyap */
133025ad7394SSaurav Kashyap if (!test_and_clear_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ,
133125ad7394SSaurav Kashyap &io_req->req_flags))
133225ad7394SSaurav Kashyap return;
133325ad7394SSaurav Kashyap /*
133425ad7394SSaurav Kashyap * If we receive a cleanup completion for this request then the
133525ad7394SSaurav Kashyap * firmware will not give us an abort completion for this request
133625ad7394SSaurav Kashyap * so clear any ABTS pending flags.
133725ad7394SSaurav Kashyap */
133825ad7394SSaurav Kashyap if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags) &&
133925ad7394SSaurav Kashyap !test_bit(BNX2FC_FLAG_ABTS_DONE, &io_req->req_flags)) {
134025ad7394SSaurav Kashyap set_bit(BNX2FC_FLAG_ABTS_DONE, &io_req->req_flags);
134125ad7394SSaurav Kashyap if (io_req->wait_for_abts_comp)
134225ad7394SSaurav Kashyap complete(&io_req->abts_done);
134325ad7394SSaurav Kashyap }
134425ad7394SSaurav Kashyap
1345853e2bd2SBhanu Gollapudi bnx2fc_scsi_done(io_req, DID_ERROR);
1346853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
13470e0fcef9SSaurav Kashyap if (io_req->wait_for_cleanup_comp)
13480e0fcef9SSaurav Kashyap complete(&io_req->cleanup_done);
1349853e2bd2SBhanu Gollapudi }
1350853e2bd2SBhanu Gollapudi
bnx2fc_process_abts_compl(struct bnx2fc_cmd * io_req,struct fcoe_task_ctx_entry * task,u8 num_rq)1351853e2bd2SBhanu Gollapudi void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req,
1352853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task,
1353853e2bd2SBhanu Gollapudi u8 num_rq)
1354853e2bd2SBhanu Gollapudi {
1355853e2bd2SBhanu Gollapudi u32 r_ctl;
1356853e2bd2SBhanu Gollapudi u32 r_a_tov = FC_DEF_R_A_TOV;
1357853e2bd2SBhanu Gollapudi u8 issue_rrq = 0;
1358853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt;
1359853e2bd2SBhanu Gollapudi
1360853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x"
1361853e2bd2SBhanu Gollapudi "refcnt = %d, cmd_type = %d\n",
1362853e2bd2SBhanu Gollapudi io_req->xid,
13632c935bc5SPeter Zijlstra kref_read(&io_req->refcount), io_req->cmd_type);
1364853e2bd2SBhanu Gollapudi
1365853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
1366853e2bd2SBhanu Gollapudi &io_req->req_flags)) {
1367853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Timer context finished processing"
1368853e2bd2SBhanu Gollapudi " this io\n");
1369853e2bd2SBhanu Gollapudi return;
1370853e2bd2SBhanu Gollapudi }
1371853e2bd2SBhanu Gollapudi
137225ad7394SSaurav Kashyap /*
137325ad7394SSaurav Kashyap * If we receive an ABTS completion here then we will not receive
137425ad7394SSaurav Kashyap * a cleanup completion so clear any cleanup pending flags.
137525ad7394SSaurav Kashyap */
137625ad7394SSaurav Kashyap if (test_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags)) {
137725ad7394SSaurav Kashyap clear_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags);
137825ad7394SSaurav Kashyap if (io_req->wait_for_cleanup_comp)
137925ad7394SSaurav Kashyap complete(&io_req->cleanup_done);
138025ad7394SSaurav Kashyap }
138125ad7394SSaurav Kashyap
1382853e2bd2SBhanu Gollapudi /* Do not issue RRQ as this IO is already cleanedup */
1383853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP,
1384853e2bd2SBhanu Gollapudi &io_req->req_flags))
1385853e2bd2SBhanu Gollapudi goto io_compl;
1386853e2bd2SBhanu Gollapudi
1387853e2bd2SBhanu Gollapudi /*
1388853e2bd2SBhanu Gollapudi * For ABTS issued due to SCSI eh_abort_handler, timeout
1389853e2bd2SBhanu Gollapudi * values are maintained by scsi-ml itself. Cancel timeout
1390853e2bd2SBhanu Gollapudi * in case ABTS issued as part of task management function
1391853e2bd2SBhanu Gollapudi * or due to FW error.
1392853e2bd2SBhanu Gollapudi */
1393853e2bd2SBhanu Gollapudi if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))
1394853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work))
1395853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount,
1396853e2bd2SBhanu Gollapudi bnx2fc_cmd_release); /* drop timer hold */
1397853e2bd2SBhanu Gollapudi
1398619c5cb6SVlad Zolotarov r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl;
1399853e2bd2SBhanu Gollapudi
1400853e2bd2SBhanu Gollapudi switch (r_ctl) {
1401853e2bd2SBhanu Gollapudi case FC_RCTL_BA_ACC:
1402853e2bd2SBhanu Gollapudi /*
1403853e2bd2SBhanu Gollapudi * Dont release this cmd yet. It will be relesed
1404853e2bd2SBhanu Gollapudi * after we get RRQ response
1405853e2bd2SBhanu Gollapudi */
1406853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n");
1407853e2bd2SBhanu Gollapudi issue_rrq = 1;
1408853e2bd2SBhanu Gollapudi break;
1409853e2bd2SBhanu Gollapudi
1410853e2bd2SBhanu Gollapudi case FC_RCTL_BA_RJT:
1411853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n");
1412853e2bd2SBhanu Gollapudi break;
1413853e2bd2SBhanu Gollapudi default:
1414853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Unknown ABTS response\n");
1415853e2bd2SBhanu Gollapudi break;
1416853e2bd2SBhanu Gollapudi }
1417853e2bd2SBhanu Gollapudi
1418853e2bd2SBhanu Gollapudi if (issue_rrq) {
1419853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n");
1420853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
1421853e2bd2SBhanu Gollapudi }
1422853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);
1423853e2bd2SBhanu Gollapudi bnx2fc_cmd_timer_set(io_req, r_a_tov);
1424853e2bd2SBhanu Gollapudi
1425853e2bd2SBhanu Gollapudi io_compl:
14260e0fcef9SSaurav Kashyap if (io_req->wait_for_abts_comp) {
1427853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
1428853e2bd2SBhanu Gollapudi &io_req->req_flags))
14290e0fcef9SSaurav Kashyap complete(&io_req->abts_done);
1430853e2bd2SBhanu Gollapudi } else {
1431853e2bd2SBhanu Gollapudi /*
1432853e2bd2SBhanu Gollapudi * We end up here when ABTS is issued as
1433853e2bd2SBhanu Gollapudi * in asynchronous context, i.e., as part
1434853e2bd2SBhanu Gollapudi * of task management completion, or
1435853e2bd2SBhanu Gollapudi * when FW error is received or when the
1436853e2bd2SBhanu Gollapudi * ABTS is issued when the IO is timed
1437853e2bd2SBhanu Gollapudi * out.
1438853e2bd2SBhanu Gollapudi */
1439853e2bd2SBhanu Gollapudi
1440853e2bd2SBhanu Gollapudi if (io_req->on_active_queue) {
1441853e2bd2SBhanu Gollapudi list_del_init(&io_req->link);
1442853e2bd2SBhanu Gollapudi io_req->on_active_queue = 0;
1443853e2bd2SBhanu Gollapudi /* Move IO req to retire queue */
1444853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->io_retire_queue);
1445853e2bd2SBhanu Gollapudi }
1446853e2bd2SBhanu Gollapudi bnx2fc_scsi_done(io_req, DID_ERROR);
1447853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
1448853e2bd2SBhanu Gollapudi }
1449853e2bd2SBhanu Gollapudi }
1450853e2bd2SBhanu Gollapudi
bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd * io_req)1451853e2bd2SBhanu Gollapudi static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req)
1452853e2bd2SBhanu Gollapudi {
1453853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1454853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt;
1455d71fb3bdSBhanu Prakash Gollapudi struct bnx2fc_cmd *cmd, *tmp;
14569cb78c16SHannes Reinecke u64 tm_lun = sc_cmd->device->lun;
14579cb78c16SHannes Reinecke u64 lun;
1458853e2bd2SBhanu Gollapudi int rc = 0;
1459853e2bd2SBhanu Gollapudi
1460853e2bd2SBhanu Gollapudi /* called with tgt_lock held */
1461853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n");
1462853e2bd2SBhanu Gollapudi /*
1463853e2bd2SBhanu Gollapudi * Walk thru the active_ios queue and ABORT the IO
1464853e2bd2SBhanu Gollapudi * that matches with the LUN that was reset
1465853e2bd2SBhanu Gollapudi */
1466d71fb3bdSBhanu Prakash Gollapudi list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {
1467853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n");
1468853e2bd2SBhanu Gollapudi lun = cmd->sc_cmd->device->lun;
1469853e2bd2SBhanu Gollapudi if (lun == tm_lun) {
1470853e2bd2SBhanu Gollapudi /* Initiate ABTS on this cmd */
1471853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
1472853e2bd2SBhanu Gollapudi &cmd->req_flags)) {
1473853e2bd2SBhanu Gollapudi /* cancel the IO timeout */
1474853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work))
1475853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount,
1476853e2bd2SBhanu Gollapudi bnx2fc_cmd_release);
1477853e2bd2SBhanu Gollapudi /* timer hold */
1478853e2bd2SBhanu Gollapudi rc = bnx2fc_initiate_abts(cmd);
147925985edcSLucas De Marchi /* abts shouldn't fail in this context */
1480853e2bd2SBhanu Gollapudi WARN_ON(rc != SUCCESS);
1481853e2bd2SBhanu Gollapudi } else
1482853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "lun_rst: abts already in"
1483853e2bd2SBhanu Gollapudi " progress for this IO 0x%x\n",
1484853e2bd2SBhanu Gollapudi cmd->xid);
1485853e2bd2SBhanu Gollapudi }
1486853e2bd2SBhanu Gollapudi }
1487853e2bd2SBhanu Gollapudi }
1488853e2bd2SBhanu Gollapudi
bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd * io_req)1489853e2bd2SBhanu Gollapudi static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req)
1490853e2bd2SBhanu Gollapudi {
1491853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt;
1492d71fb3bdSBhanu Prakash Gollapudi struct bnx2fc_cmd *cmd, *tmp;
1493853e2bd2SBhanu Gollapudi int rc = 0;
1494853e2bd2SBhanu Gollapudi
1495853e2bd2SBhanu Gollapudi /* called with tgt_lock held */
1496853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n");
1497853e2bd2SBhanu Gollapudi /*
1498853e2bd2SBhanu Gollapudi * Walk thru the active_ios queue and ABORT the IO
1499853e2bd2SBhanu Gollapudi * that matches with the LUN that was reset
1500853e2bd2SBhanu Gollapudi */
1501d71fb3bdSBhanu Prakash Gollapudi list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {
1502853e2bd2SBhanu Gollapudi BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n");
1503853e2bd2SBhanu Gollapudi /* Initiate ABTS */
1504853e2bd2SBhanu Gollapudi if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
1505853e2bd2SBhanu Gollapudi &cmd->req_flags)) {
1506853e2bd2SBhanu Gollapudi /* cancel the IO timeout */
1507853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work))
1508853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount,
1509853e2bd2SBhanu Gollapudi bnx2fc_cmd_release); /* timer hold */
1510853e2bd2SBhanu Gollapudi rc = bnx2fc_initiate_abts(cmd);
151125985edcSLucas De Marchi /* abts shouldn't fail in this context */
1512853e2bd2SBhanu Gollapudi WARN_ON(rc != SUCCESS);
1513853e2bd2SBhanu Gollapudi
1514853e2bd2SBhanu Gollapudi } else
1515853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "tgt_rst: abts already in progress"
1516853e2bd2SBhanu Gollapudi " for this IO 0x%x\n", cmd->xid);
1517853e2bd2SBhanu Gollapudi }
1518853e2bd2SBhanu Gollapudi }
1519853e2bd2SBhanu Gollapudi
bnx2fc_process_tm_compl(struct bnx2fc_cmd * io_req,struct fcoe_task_ctx_entry * task,u8 num_rq,unsigned char * rq_data)1520853e2bd2SBhanu Gollapudi void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req,
152177331115SJaved Hasan struct fcoe_task_ctx_entry *task, u8 num_rq,
152277331115SJaved Hasan unsigned char *rq_data)
1523853e2bd2SBhanu Gollapudi {
1524853e2bd2SBhanu Gollapudi struct bnx2fc_mp_req *tm_req;
1525853e2bd2SBhanu Gollapudi struct fc_frame_header *fc_hdr;
1526853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1527853e2bd2SBhanu Gollapudi u64 *hdr;
1528853e2bd2SBhanu Gollapudi u64 *temp_hdr;
1529853e2bd2SBhanu Gollapudi void *rsp_buf;
1530853e2bd2SBhanu Gollapudi
1531853e2bd2SBhanu Gollapudi /* Called with tgt_lock held */
1532853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n");
1533853e2bd2SBhanu Gollapudi
1534853e2bd2SBhanu Gollapudi if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags)))
1535853e2bd2SBhanu Gollapudi set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags);
1536853e2bd2SBhanu Gollapudi else {
1537853e2bd2SBhanu Gollapudi /* TM has already timed out and we got
1538853e2bd2SBhanu Gollapudi * delayed completion. Ignore completion
1539853e2bd2SBhanu Gollapudi * processing.
1540853e2bd2SBhanu Gollapudi */
1541853e2bd2SBhanu Gollapudi return;
1542853e2bd2SBhanu Gollapudi }
1543853e2bd2SBhanu Gollapudi
1544853e2bd2SBhanu Gollapudi tm_req = &(io_req->mp_req);
1545853e2bd2SBhanu Gollapudi fc_hdr = &(tm_req->resp_fc_hdr);
1546853e2bd2SBhanu Gollapudi hdr = (u64 *)fc_hdr;
1547853e2bd2SBhanu Gollapudi temp_hdr = (u64 *)
1548619c5cb6SVlad Zolotarov &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr;
1549853e2bd2SBhanu Gollapudi hdr[0] = cpu_to_be64(temp_hdr[0]);
1550853e2bd2SBhanu Gollapudi hdr[1] = cpu_to_be64(temp_hdr[1]);
1551853e2bd2SBhanu Gollapudi hdr[2] = cpu_to_be64(temp_hdr[2]);
1552853e2bd2SBhanu Gollapudi
1553619c5cb6SVlad Zolotarov tm_req->resp_len =
1554619c5cb6SVlad Zolotarov task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len;
1555853e2bd2SBhanu Gollapudi
1556853e2bd2SBhanu Gollapudi rsp_buf = tm_req->resp_buf;
1557853e2bd2SBhanu Gollapudi
1558853e2bd2SBhanu Gollapudi if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) {
1559853e2bd2SBhanu Gollapudi bnx2fc_parse_fcp_rsp(io_req,
1560853e2bd2SBhanu Gollapudi (struct fcoe_fcp_rsp_payload *)
156177331115SJaved Hasan rsp_buf, num_rq, rq_data);
1562853e2bd2SBhanu Gollapudi if (io_req->fcp_rsp_code == 0) {
1563853e2bd2SBhanu Gollapudi /* TM successful */
1564853e2bd2SBhanu Gollapudi if (tm_req->tm_flags & FCP_TMF_LUN_RESET)
1565853e2bd2SBhanu Gollapudi bnx2fc_lun_reset_cmpl(io_req);
1566853e2bd2SBhanu Gollapudi else if (tm_req->tm_flags & FCP_TMF_TGT_RESET)
1567853e2bd2SBhanu Gollapudi bnx2fc_tgt_reset_cmpl(io_req);
1568853e2bd2SBhanu Gollapudi }
1569853e2bd2SBhanu Gollapudi } else {
1570853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n",
1571853e2bd2SBhanu Gollapudi fc_hdr->fh_r_ctl);
1572853e2bd2SBhanu Gollapudi }
1573f4b4216fSBart Van Assche if (!bnx2fc_priv(sc_cmd)->io_req) {
1574f4b4216fSBart Van Assche printk(KERN_ERR PFX "tm_compl: io_req is NULL\n");
1575853e2bd2SBhanu Gollapudi return;
1576853e2bd2SBhanu Gollapudi }
1577853e2bd2SBhanu Gollapudi switch (io_req->fcp_status) {
1578853e2bd2SBhanu Gollapudi case FC_GOOD:
1579853e2bd2SBhanu Gollapudi if (io_req->cdb_status == 0) {
1580853e2bd2SBhanu Gollapudi /* Good IO completion */
1581853e2bd2SBhanu Gollapudi sc_cmd->result = DID_OK << 16;
1582853e2bd2SBhanu Gollapudi } else {
1583853e2bd2SBhanu Gollapudi /* Transport status is good, SCSI status not good */
1584853e2bd2SBhanu Gollapudi sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
1585853e2bd2SBhanu Gollapudi }
1586853e2bd2SBhanu Gollapudi if (io_req->fcp_resid)
1587853e2bd2SBhanu Gollapudi scsi_set_resid(sc_cmd, io_req->fcp_resid);
1588853e2bd2SBhanu Gollapudi break;
1589853e2bd2SBhanu Gollapudi
1590853e2bd2SBhanu Gollapudi default:
1591853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n",
1592853e2bd2SBhanu Gollapudi io_req->fcp_status);
1593853e2bd2SBhanu Gollapudi break;
1594853e2bd2SBhanu Gollapudi }
1595853e2bd2SBhanu Gollapudi
1596853e2bd2SBhanu Gollapudi sc_cmd = io_req->sc_cmd;
1597853e2bd2SBhanu Gollapudi io_req->sc_cmd = NULL;
1598853e2bd2SBhanu Gollapudi
1599853e2bd2SBhanu Gollapudi /* check if the io_req exists in tgt's tmf_q */
1600853e2bd2SBhanu Gollapudi if (io_req->on_tmf_queue) {
1601853e2bd2SBhanu Gollapudi
1602853e2bd2SBhanu Gollapudi list_del_init(&io_req->link);
1603853e2bd2SBhanu Gollapudi io_req->on_tmf_queue = 0;
1604853e2bd2SBhanu Gollapudi } else {
1605853e2bd2SBhanu Gollapudi
1606b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "Command not on active_cmd_queue!\n");
1607853e2bd2SBhanu Gollapudi return;
1608853e2bd2SBhanu Gollapudi }
1609853e2bd2SBhanu Gollapudi
1610f4b4216fSBart Van Assche bnx2fc_priv(sc_cmd)->io_req = NULL;
1611a75af82aSBart Van Assche scsi_done(sc_cmd);
1612853e2bd2SBhanu Gollapudi
1613853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
16140e0fcef9SSaurav Kashyap if (io_req->wait_for_abts_comp) {
1615853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n");
16160e0fcef9SSaurav Kashyap complete(&io_req->abts_done);
1617853e2bd2SBhanu Gollapudi }
1618853e2bd2SBhanu Gollapudi }
1619853e2bd2SBhanu Gollapudi
bnx2fc_split_bd(struct bnx2fc_cmd * io_req,u64 addr,int sg_len,int bd_index)1620853e2bd2SBhanu Gollapudi static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
1621853e2bd2SBhanu Gollapudi int bd_index)
1622853e2bd2SBhanu Gollapudi {
1623853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1624853e2bd2SBhanu Gollapudi int frag_size, sg_frags;
1625853e2bd2SBhanu Gollapudi
1626853e2bd2SBhanu Gollapudi sg_frags = 0;
1627853e2bd2SBhanu Gollapudi while (sg_len) {
1628853e2bd2SBhanu Gollapudi if (sg_len >= BNX2FC_BD_SPLIT_SZ)
1629853e2bd2SBhanu Gollapudi frag_size = BNX2FC_BD_SPLIT_SZ;
1630853e2bd2SBhanu Gollapudi else
1631853e2bd2SBhanu Gollapudi frag_size = sg_len;
1632853e2bd2SBhanu Gollapudi bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff;
1633853e2bd2SBhanu Gollapudi bd[bd_index + sg_frags].buf_addr_hi = addr >> 32;
1634853e2bd2SBhanu Gollapudi bd[bd_index + sg_frags].buf_len = (u16)frag_size;
1635853e2bd2SBhanu Gollapudi bd[bd_index + sg_frags].flags = 0;
1636853e2bd2SBhanu Gollapudi
1637853e2bd2SBhanu Gollapudi addr += (u64) frag_size;
1638853e2bd2SBhanu Gollapudi sg_frags++;
1639853e2bd2SBhanu Gollapudi sg_len -= frag_size;
1640853e2bd2SBhanu Gollapudi }
1641853e2bd2SBhanu Gollapudi return sg_frags;
1642853e2bd2SBhanu Gollapudi
1643853e2bd2SBhanu Gollapudi }
1644853e2bd2SBhanu Gollapudi
bnx2fc_map_sg(struct bnx2fc_cmd * io_req)1645853e2bd2SBhanu Gollapudi static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req)
1646853e2bd2SBhanu Gollapudi {
16473ce41ea1SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = io_req->port->priv;
16483ce41ea1SBhanu Prakash Gollapudi struct bnx2fc_hba *hba = interface->hba;
1649853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc = io_req->sc_cmd;
1650853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1651853e2bd2SBhanu Gollapudi struct scatterlist *sg;
1652853e2bd2SBhanu Gollapudi int byte_count = 0;
1653853e2bd2SBhanu Gollapudi int sg_count = 0;
1654853e2bd2SBhanu Gollapudi int bd_count = 0;
1655853e2bd2SBhanu Gollapudi int sg_frags;
1656853e2bd2SBhanu Gollapudi unsigned int sg_len;
1657853e2bd2SBhanu Gollapudi u64 addr;
1658853e2bd2SBhanu Gollapudi int i;
1659853e2bd2SBhanu Gollapudi
16603c97b569SSaurav Kashyap WARN_ON(scsi_sg_count(sc) > BNX2FC_MAX_BDS_PER_CMD);
16615565461eSChad Dupuis /*
16625565461eSChad Dupuis * Use dma_map_sg directly to ensure we're using the correct
16635565461eSChad Dupuis * dev struct off of pcidev.
16645565461eSChad Dupuis */
16653ce41ea1SBhanu Prakash Gollapudi sg_count = dma_map_sg(&hba->pcidev->dev, scsi_sglist(sc),
16663ce41ea1SBhanu Prakash Gollapudi scsi_sg_count(sc), sc->sc_data_direction);
1667853e2bd2SBhanu Gollapudi scsi_for_each_sg(sc, sg, sg_count, i) {
1668853e2bd2SBhanu Gollapudi sg_len = sg_dma_len(sg);
1669853e2bd2SBhanu Gollapudi addr = sg_dma_address(sg);
1670853e2bd2SBhanu Gollapudi if (sg_len > BNX2FC_MAX_BD_LEN) {
1671853e2bd2SBhanu Gollapudi sg_frags = bnx2fc_split_bd(io_req, addr, sg_len,
1672853e2bd2SBhanu Gollapudi bd_count);
1673853e2bd2SBhanu Gollapudi } else {
1674853e2bd2SBhanu Gollapudi
1675853e2bd2SBhanu Gollapudi sg_frags = 1;
1676853e2bd2SBhanu Gollapudi bd[bd_count].buf_addr_lo = addr & 0xffffffff;
1677853e2bd2SBhanu Gollapudi bd[bd_count].buf_addr_hi = addr >> 32;
1678853e2bd2SBhanu Gollapudi bd[bd_count].buf_len = (u16)sg_len;
1679853e2bd2SBhanu Gollapudi bd[bd_count].flags = 0;
1680853e2bd2SBhanu Gollapudi }
1681853e2bd2SBhanu Gollapudi bd_count += sg_frags;
1682853e2bd2SBhanu Gollapudi byte_count += sg_len;
1683853e2bd2SBhanu Gollapudi }
1684853e2bd2SBhanu Gollapudi if (byte_count != scsi_bufflen(sc))
1685853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, "
1686853e2bd2SBhanu Gollapudi "task_id = 0x%x\n", byte_count, scsi_bufflen(sc),
1687853e2bd2SBhanu Gollapudi io_req->xid);
1688853e2bd2SBhanu Gollapudi return bd_count;
1689853e2bd2SBhanu Gollapudi }
1690853e2bd2SBhanu Gollapudi
bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd * io_req)1691822f2903SBhanu Prakash Gollapudi static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req)
1692853e2bd2SBhanu Gollapudi {
1693853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc = io_req->sc_cmd;
1694853e2bd2SBhanu Gollapudi struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1695853e2bd2SBhanu Gollapudi int bd_count;
1696853e2bd2SBhanu Gollapudi
1697822f2903SBhanu Prakash Gollapudi if (scsi_sg_count(sc)) {
1698853e2bd2SBhanu Gollapudi bd_count = bnx2fc_map_sg(io_req);
1699822f2903SBhanu Prakash Gollapudi if (bd_count == 0)
1700822f2903SBhanu Prakash Gollapudi return -ENOMEM;
1701822f2903SBhanu Prakash Gollapudi } else {
1702853e2bd2SBhanu Gollapudi bd_count = 0;
1703853e2bd2SBhanu Gollapudi bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0;
1704853e2bd2SBhanu Gollapudi bd[0].buf_len = bd[0].flags = 0;
1705853e2bd2SBhanu Gollapudi }
1706853e2bd2SBhanu Gollapudi io_req->bd_tbl->bd_valid = bd_count;
1707822f2903SBhanu Prakash Gollapudi
17083c97b569SSaurav Kashyap /*
17093c97b569SSaurav Kashyap * Return the command to ML if BD count exceeds the max number
17103c97b569SSaurav Kashyap * that can be handled by FW.
17113c97b569SSaurav Kashyap */
17123c97b569SSaurav Kashyap if (bd_count > BNX2FC_FW_MAX_BDS_PER_CMD) {
17133c97b569SSaurav Kashyap pr_err("bd_count = %d exceeded FW supported max BD(255), task_id = 0x%x\n",
17143c97b569SSaurav Kashyap bd_count, io_req->xid);
17153c97b569SSaurav Kashyap return -ENOMEM;
17163c97b569SSaurav Kashyap }
17173c97b569SSaurav Kashyap
1718822f2903SBhanu Prakash Gollapudi return 0;
1719853e2bd2SBhanu Gollapudi }
1720853e2bd2SBhanu Gollapudi
bnx2fc_unmap_sg_list(struct bnx2fc_cmd * io_req)1721853e2bd2SBhanu Gollapudi static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req)
1722853e2bd2SBhanu Gollapudi {
1723853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc = io_req->sc_cmd;
17245565461eSChad Dupuis struct bnx2fc_interface *interface = io_req->port->priv;
17255565461eSChad Dupuis struct bnx2fc_hba *hba = interface->hba;
1726853e2bd2SBhanu Gollapudi
17275565461eSChad Dupuis /*
17285565461eSChad Dupuis * Use dma_unmap_sg directly to ensure we're using the correct
17295565461eSChad Dupuis * dev struct off of pcidev.
17305565461eSChad Dupuis */
17315565461eSChad Dupuis if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) {
17325565461eSChad Dupuis dma_unmap_sg(&hba->pcidev->dev, scsi_sglist(sc),
17335565461eSChad Dupuis scsi_sg_count(sc), sc->sc_data_direction);
1734853e2bd2SBhanu Gollapudi io_req->bd_tbl->bd_valid = 0;
1735853e2bd2SBhanu Gollapudi }
1736853e2bd2SBhanu Gollapudi }
1737853e2bd2SBhanu Gollapudi
bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd * io_req,struct fcp_cmnd * fcp_cmnd)1738853e2bd2SBhanu Gollapudi void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req,
1739853e2bd2SBhanu Gollapudi struct fcp_cmnd *fcp_cmnd)
1740853e2bd2SBhanu Gollapudi {
1741853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1742853e2bd2SBhanu Gollapudi
1743853e2bd2SBhanu Gollapudi memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
1744853e2bd2SBhanu Gollapudi
1745e35fa8c2SAndy Grover int_to_scsilun(sc_cmd->device->lun, &fcp_cmnd->fc_lun);
1746853e2bd2SBhanu Gollapudi
1747853e2bd2SBhanu Gollapudi fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len);
1748853e2bd2SBhanu Gollapudi memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len);
1749853e2bd2SBhanu Gollapudi
1750853e2bd2SBhanu Gollapudi fcp_cmnd->fc_cmdref = 0;
1751853e2bd2SBhanu Gollapudi fcp_cmnd->fc_pri_ta = 0;
1752853e2bd2SBhanu Gollapudi fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags;
1753853e2bd2SBhanu Gollapudi fcp_cmnd->fc_flags = io_req->io_req_flags;
1754853e2bd2SBhanu Gollapudi fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE;
1755853e2bd2SBhanu Gollapudi }
1756853e2bd2SBhanu Gollapudi
bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd * io_req,struct fcoe_fcp_rsp_payload * fcp_rsp,u8 num_rq,unsigned char * rq_data)1757853e2bd2SBhanu Gollapudi static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
1758853e2bd2SBhanu Gollapudi struct fcoe_fcp_rsp_payload *fcp_rsp,
175977331115SJaved Hasan u8 num_rq, unsigned char *rq_data)
1760853e2bd2SBhanu Gollapudi {
1761853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1762853e2bd2SBhanu Gollapudi u8 rsp_flags = fcp_rsp->fcp_flags.flags;
1763853e2bd2SBhanu Gollapudi u32 rq_buff_len = 0;
1764853e2bd2SBhanu Gollapudi int fcp_sns_len = 0;
1765853e2bd2SBhanu Gollapudi int fcp_rsp_len = 0;
1766853e2bd2SBhanu Gollapudi
1767853e2bd2SBhanu Gollapudi io_req->fcp_status = FC_GOOD;
1768adcf7dfbSChad Dupuis io_req->fcp_resid = 0;
1769adcf7dfbSChad Dupuis if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER |
1770adcf7dfbSChad Dupuis FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER))
1771853e2bd2SBhanu Gollapudi io_req->fcp_resid = fcp_rsp->fcp_resid;
1772853e2bd2SBhanu Gollapudi
1773853e2bd2SBhanu Gollapudi io_req->scsi_comp_flags = rsp_flags;
1774f4b4216fSBart Van Assche io_req->cdb_status = fcp_rsp->scsi_status_code;
1775853e2bd2SBhanu Gollapudi
1776853e2bd2SBhanu Gollapudi /* Fetch fcp_rsp_info and fcp_sns_info if available */
1777853e2bd2SBhanu Gollapudi if (num_rq) {
1778853e2bd2SBhanu Gollapudi
1779853e2bd2SBhanu Gollapudi /*
1780853e2bd2SBhanu Gollapudi * We do not anticipate num_rq >1, as the linux defined
1781853e2bd2SBhanu Gollapudi * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO
1782853e2bd2SBhanu Gollapudi * 256 bytes of single rq buffer is good enough to hold this.
1783853e2bd2SBhanu Gollapudi */
1784853e2bd2SBhanu Gollapudi
1785853e2bd2SBhanu Gollapudi if (rsp_flags &
1786853e2bd2SBhanu Gollapudi FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) {
1787853e2bd2SBhanu Gollapudi fcp_rsp_len = rq_buff_len
1788853e2bd2SBhanu Gollapudi = fcp_rsp->fcp_rsp_len;
1789853e2bd2SBhanu Gollapudi }
1790853e2bd2SBhanu Gollapudi
1791853e2bd2SBhanu Gollapudi if (rsp_flags &
1792853e2bd2SBhanu Gollapudi FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) {
1793853e2bd2SBhanu Gollapudi fcp_sns_len = fcp_rsp->fcp_sns_len;
1794853e2bd2SBhanu Gollapudi rq_buff_len += fcp_rsp->fcp_sns_len;
1795853e2bd2SBhanu Gollapudi }
1796853e2bd2SBhanu Gollapudi
1797853e2bd2SBhanu Gollapudi io_req->fcp_rsp_len = fcp_rsp_len;
1798853e2bd2SBhanu Gollapudi io_req->fcp_sns_len = fcp_sns_len;
1799853e2bd2SBhanu Gollapudi
1800853e2bd2SBhanu Gollapudi if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) {
1801853e2bd2SBhanu Gollapudi /* Invalid sense sense length. */
1802b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "invalid sns length %d\n",
1803853e2bd2SBhanu Gollapudi rq_buff_len);
1804853e2bd2SBhanu Gollapudi /* reset rq_buff_len */
1805853e2bd2SBhanu Gollapudi rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ;
1806853e2bd2SBhanu Gollapudi }
1807853e2bd2SBhanu Gollapudi
1808853e2bd2SBhanu Gollapudi /* fetch fcp_rsp_code */
1809853e2bd2SBhanu Gollapudi if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) {
1810853e2bd2SBhanu Gollapudi /* Only for task management function */
1811853e2bd2SBhanu Gollapudi io_req->fcp_rsp_code = rq_data[3];
18128a30a3c7SMaurizio Lombardi BNX2FC_IO_DBG(io_req, "fcp_rsp_code = %d\n",
1813853e2bd2SBhanu Gollapudi io_req->fcp_rsp_code);
1814853e2bd2SBhanu Gollapudi }
1815853e2bd2SBhanu Gollapudi
1816853e2bd2SBhanu Gollapudi /* fetch sense data */
1817853e2bd2SBhanu Gollapudi rq_data += fcp_rsp_len;
1818853e2bd2SBhanu Gollapudi
1819853e2bd2SBhanu Gollapudi if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) {
1820853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Truncating sense buffer\n");
1821853e2bd2SBhanu Gollapudi fcp_sns_len = SCSI_SENSE_BUFFERSIZE;
1822853e2bd2SBhanu Gollapudi }
1823853e2bd2SBhanu Gollapudi
182416da05b1SAndi Kleen memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1825853e2bd2SBhanu Gollapudi if (fcp_sns_len)
1826853e2bd2SBhanu Gollapudi memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len);
1827853e2bd2SBhanu Gollapudi
1828853e2bd2SBhanu Gollapudi }
1829853e2bd2SBhanu Gollapudi }
1830853e2bd2SBhanu Gollapudi
1831853e2bd2SBhanu Gollapudi /**
1832853e2bd2SBhanu Gollapudi * bnx2fc_queuecommand - Queuecommand function of the scsi template
1833853e2bd2SBhanu Gollapudi *
1834853e2bd2SBhanu Gollapudi * @host: The Scsi_Host the command was issued to
1835853e2bd2SBhanu Gollapudi * @sc_cmd: struct scsi_cmnd to be executed
1836853e2bd2SBhanu Gollapudi *
1837853e2bd2SBhanu Gollapudi * This is the IO strategy routine, called by SCSI-ML
1838853e2bd2SBhanu Gollapudi **/
bnx2fc_queuecommand(struct Scsi_Host * host,struct scsi_cmnd * sc_cmd)1839853e2bd2SBhanu Gollapudi int bnx2fc_queuecommand(struct Scsi_Host *host,
1840853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd)
1841853e2bd2SBhanu Gollapudi {
1842853e2bd2SBhanu Gollapudi struct fc_lport *lport = shost_priv(host);
1843853e2bd2SBhanu Gollapudi struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
1844853e2bd2SBhanu Gollapudi struct fc_rport_libfc_priv *rp = rport->dd_data;
1845853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt;
1846853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req;
1847853e2bd2SBhanu Gollapudi int rc = 0;
1848853e2bd2SBhanu Gollapudi int rval;
1849853e2bd2SBhanu Gollapudi
1850853e2bd2SBhanu Gollapudi rval = fc_remote_port_chkready(rport);
1851853e2bd2SBhanu Gollapudi if (rval) {
1852853e2bd2SBhanu Gollapudi sc_cmd->result = rval;
1853a75af82aSBart Van Assche scsi_done(sc_cmd);
1854853e2bd2SBhanu Gollapudi return 0;
1855853e2bd2SBhanu Gollapudi }
1856853e2bd2SBhanu Gollapudi
1857853e2bd2SBhanu Gollapudi if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
1858853e2bd2SBhanu Gollapudi rc = SCSI_MLQUEUE_HOST_BUSY;
1859853e2bd2SBhanu Gollapudi goto exit_qcmd;
1860853e2bd2SBhanu Gollapudi }
1861853e2bd2SBhanu Gollapudi
1862853e2bd2SBhanu Gollapudi /* rport and tgt are allocated together, so tgt should be non-NULL */
1863853e2bd2SBhanu Gollapudi tgt = (struct bnx2fc_rport *)&rp[1];
1864853e2bd2SBhanu Gollapudi
1865853e2bd2SBhanu Gollapudi if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
1866853e2bd2SBhanu Gollapudi /*
1867853e2bd2SBhanu Gollapudi * Session is not offloaded yet. Let SCSI-ml retry
1868853e2bd2SBhanu Gollapudi * the command.
1869853e2bd2SBhanu Gollapudi */
1870853e2bd2SBhanu Gollapudi rc = SCSI_MLQUEUE_TARGET_BUSY;
1871853e2bd2SBhanu Gollapudi goto exit_qcmd;
1872853e2bd2SBhanu Gollapudi }
1873245a5754SEddie Wai if (tgt->retry_delay_timestamp) {
1874245a5754SEddie Wai if (time_after(jiffies, tgt->retry_delay_timestamp)) {
1875245a5754SEddie Wai tgt->retry_delay_timestamp = 0;
1876245a5754SEddie Wai } else {
1877245a5754SEddie Wai /* If retry_delay timer is active, flow off the ML */
1878245a5754SEddie Wai rc = SCSI_MLQUEUE_TARGET_BUSY;
1879245a5754SEddie Wai goto exit_qcmd;
1880245a5754SEddie Wai }
1881245a5754SEddie Wai }
1882dc6311ddSMaurizio Lombardi
1883dc6311ddSMaurizio Lombardi spin_lock_bh(&tgt->tgt_lock);
1884dc6311ddSMaurizio Lombardi
1885853e2bd2SBhanu Gollapudi io_req = bnx2fc_cmd_alloc(tgt);
1886853e2bd2SBhanu Gollapudi if (!io_req) {
1887853e2bd2SBhanu Gollapudi rc = SCSI_MLQUEUE_HOST_BUSY;
1888dc6311ddSMaurizio Lombardi goto exit_qcmd_tgtlock;
1889853e2bd2SBhanu Gollapudi }
1890853e2bd2SBhanu Gollapudi io_req->sc_cmd = sc_cmd;
1891853e2bd2SBhanu Gollapudi
1892853e2bd2SBhanu Gollapudi if (bnx2fc_post_io_req(tgt, io_req)) {
1893853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Unable to post io_req\n");
1894853e2bd2SBhanu Gollapudi rc = SCSI_MLQUEUE_HOST_BUSY;
1895dc6311ddSMaurizio Lombardi goto exit_qcmd_tgtlock;
1896853e2bd2SBhanu Gollapudi }
1897dc6311ddSMaurizio Lombardi
1898dc6311ddSMaurizio Lombardi exit_qcmd_tgtlock:
1899dc6311ddSMaurizio Lombardi spin_unlock_bh(&tgt->tgt_lock);
1900853e2bd2SBhanu Gollapudi exit_qcmd:
1901853e2bd2SBhanu Gollapudi return rc;
1902853e2bd2SBhanu Gollapudi }
1903853e2bd2SBhanu Gollapudi
bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd * io_req,struct fcoe_task_ctx_entry * task,u8 num_rq,unsigned char * rq_data)1904853e2bd2SBhanu Gollapudi void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req,
1905853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task,
190677331115SJaved Hasan u8 num_rq, unsigned char *rq_data)
1907853e2bd2SBhanu Gollapudi {
1908853e2bd2SBhanu Gollapudi struct fcoe_fcp_rsp_payload *fcp_rsp;
1909853e2bd2SBhanu Gollapudi struct bnx2fc_rport *tgt = io_req->tgt;
1910853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd;
1911c9c53749SLaurence Oberman u16 scope = 0, qualifier = 0;
1912853e2bd2SBhanu Gollapudi
1913853e2bd2SBhanu Gollapudi /* scsi_cmd_cmpl is called with tgt lock held */
1914853e2bd2SBhanu Gollapudi
1915853e2bd2SBhanu Gollapudi if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) {
1916853e2bd2SBhanu Gollapudi /* we will not receive ABTS response for this IO */
1917853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "Timer context finished processing "
1918853e2bd2SBhanu Gollapudi "this scsi cmd\n");
191930e73671SSaurav Kashyap if (test_and_clear_bit(BNX2FC_FLAG_IO_CLEANUP,
192030e73671SSaurav Kashyap &io_req->req_flags)) {
192130e73671SSaurav Kashyap BNX2FC_IO_DBG(io_req,
192230e73671SSaurav Kashyap "Actual completion after cleanup request cleaning up\n");
192330e73671SSaurav Kashyap bnx2fc_process_cleanup_compl(io_req, task, num_rq);
192430e73671SSaurav Kashyap }
1925ecf7ff49SChad Dupuis return;
1926853e2bd2SBhanu Gollapudi }
1927853e2bd2SBhanu Gollapudi
1928853e2bd2SBhanu Gollapudi /* Cancel the timeout_work, as we received IO completion */
1929853e2bd2SBhanu Gollapudi if (cancel_delayed_work(&io_req->timeout_work))
1930853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount,
1931853e2bd2SBhanu Gollapudi bnx2fc_cmd_release); /* drop timer hold */
1932853e2bd2SBhanu Gollapudi
1933853e2bd2SBhanu Gollapudi sc_cmd = io_req->sc_cmd;
1934853e2bd2SBhanu Gollapudi if (sc_cmd == NULL) {
1935853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n");
1936853e2bd2SBhanu Gollapudi return;
1937853e2bd2SBhanu Gollapudi }
1938853e2bd2SBhanu Gollapudi
1939853e2bd2SBhanu Gollapudi /* Fetch fcp_rsp from task context and perform cmd completion */
1940853e2bd2SBhanu Gollapudi fcp_rsp = (struct fcoe_fcp_rsp_payload *)
1941619c5cb6SVlad Zolotarov &(task->rxwr_only.union_ctx.comp_info.fcp_rsp.payload);
1942853e2bd2SBhanu Gollapudi
1943853e2bd2SBhanu Gollapudi /* parse fcp_rsp and obtain sense data from RQ if available */
194477331115SJaved Hasan bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq, rq_data);
1945853e2bd2SBhanu Gollapudi
1946f4b4216fSBart Van Assche if (!bnx2fc_priv(sc_cmd)->io_req) {
1947f4b4216fSBart Van Assche printk(KERN_ERR PFX "io_req is NULL\n");
1948853e2bd2SBhanu Gollapudi return;
1949853e2bd2SBhanu Gollapudi }
1950853e2bd2SBhanu Gollapudi
1951853e2bd2SBhanu Gollapudi if (io_req->on_active_queue) {
1952853e2bd2SBhanu Gollapudi list_del_init(&io_req->link);
1953853e2bd2SBhanu Gollapudi io_req->on_active_queue = 0;
1954853e2bd2SBhanu Gollapudi /* Move IO req to retire queue */
1955853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->io_retire_queue);
1956853e2bd2SBhanu Gollapudi } else {
1957853e2bd2SBhanu Gollapudi /* This should not happen, but could have been pulled
1958853e2bd2SBhanu Gollapudi * by bnx2fc_flush_active_ios(), or during a race
1959853e2bd2SBhanu Gollapudi * between command abort and (late) completion.
1960853e2bd2SBhanu Gollapudi */
1961853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n");
19620e0fcef9SSaurav Kashyap if (io_req->wait_for_abts_comp)
1963853e2bd2SBhanu Gollapudi if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
1964853e2bd2SBhanu Gollapudi &io_req->req_flags))
19650e0fcef9SSaurav Kashyap complete(&io_req->abts_done);
1966853e2bd2SBhanu Gollapudi }
1967853e2bd2SBhanu Gollapudi
1968853e2bd2SBhanu Gollapudi bnx2fc_unmap_sg_list(io_req);
1969b5a95fe7SBhanu Prakash Gollapudi io_req->sc_cmd = NULL;
1970853e2bd2SBhanu Gollapudi
1971853e2bd2SBhanu Gollapudi switch (io_req->fcp_status) {
1972853e2bd2SBhanu Gollapudi case FC_GOOD:
1973853e2bd2SBhanu Gollapudi if (io_req->cdb_status == 0) {
1974853e2bd2SBhanu Gollapudi /* Good IO completion */
1975853e2bd2SBhanu Gollapudi sc_cmd->result = DID_OK << 16;
1976853e2bd2SBhanu Gollapudi } else {
1977853e2bd2SBhanu Gollapudi /* Transport status is good, SCSI status not good */
1978853e2bd2SBhanu Gollapudi BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d"
1979853e2bd2SBhanu Gollapudi " fcp_resid = 0x%x\n",
1980853e2bd2SBhanu Gollapudi io_req->cdb_status, io_req->fcp_resid);
1981853e2bd2SBhanu Gollapudi sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
1982245a5754SEddie Wai
1983245a5754SEddie Wai if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL ||
1984245a5754SEddie Wai io_req->cdb_status == SAM_STAT_BUSY) {
1985c9c53749SLaurence Oberman /* Newer array firmware with BUSY or
1986c9c53749SLaurence Oberman * TASK_SET_FULL may return a status that needs
1987c9c53749SLaurence Oberman * the scope bits masked.
1988c9c53749SLaurence Oberman * Or a huge delay timestamp up to 27 minutes
1989c9c53749SLaurence Oberman * can result.
1990c9c53749SLaurence Oberman */
1991c9c53749SLaurence Oberman if (fcp_rsp->retry_delay_timer) {
1992c9c53749SLaurence Oberman /* Upper 2 bits */
1993c9c53749SLaurence Oberman scope = fcp_rsp->retry_delay_timer
1994c9c53749SLaurence Oberman & 0xC000;
1995c9c53749SLaurence Oberman /* Lower 14 bits */
1996c9c53749SLaurence Oberman qualifier = fcp_rsp->retry_delay_timer
1997c9c53749SLaurence Oberman & 0x3FFF;
1998245a5754SEddie Wai }
1999c9c53749SLaurence Oberman if (scope > 0 && qualifier > 0 &&
2000c9c53749SLaurence Oberman qualifier <= 0x3FEF) {
2001c9c53749SLaurence Oberman /* Set the jiffies +
2002c9c53749SLaurence Oberman * retry_delay_timer * 100ms
2003c9c53749SLaurence Oberman * for the rport/tgt
2004c9c53749SLaurence Oberman */
2005c9c53749SLaurence Oberman tgt->retry_delay_timestamp = jiffies +
2006c9c53749SLaurence Oberman (qualifier * HZ / 10);
2007c9c53749SLaurence Oberman }
2008c9c53749SLaurence Oberman }
2009853e2bd2SBhanu Gollapudi }
2010853e2bd2SBhanu Gollapudi if (io_req->fcp_resid)
2011853e2bd2SBhanu Gollapudi scsi_set_resid(sc_cmd, io_req->fcp_resid);
2012853e2bd2SBhanu Gollapudi break;
2013853e2bd2SBhanu Gollapudi default:
2014b2a554ffSBhanu Prakash Gollapudi printk(KERN_ERR PFX "scsi_cmd_compl: fcp_status = %d\n",
2015853e2bd2SBhanu Gollapudi io_req->fcp_status);
2016853e2bd2SBhanu Gollapudi break;
2017853e2bd2SBhanu Gollapudi }
2018f4b4216fSBart Van Assche bnx2fc_priv(sc_cmd)->io_req = NULL;
2019a75af82aSBart Van Assche scsi_done(sc_cmd);
2020853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
2021853e2bd2SBhanu Gollapudi }
2022853e2bd2SBhanu Gollapudi
bnx2fc_post_io_req(struct bnx2fc_rport * tgt,struct bnx2fc_cmd * io_req)202374446954SBhanu Prakash Gollapudi int bnx2fc_post_io_req(struct bnx2fc_rport *tgt,
2024853e2bd2SBhanu Gollapudi struct bnx2fc_cmd *io_req)
2025853e2bd2SBhanu Gollapudi {
2026853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task;
2027853e2bd2SBhanu Gollapudi struct fcoe_task_ctx_entry *task_page;
2028853e2bd2SBhanu Gollapudi struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
2029853e2bd2SBhanu Gollapudi struct fcoe_port *port = tgt->port;
2030aea71a02SBhanu Prakash Gollapudi struct bnx2fc_interface *interface = port->priv;
2031aea71a02SBhanu Prakash Gollapudi struct bnx2fc_hba *hba = interface->hba;
2032853e2bd2SBhanu Gollapudi struct fc_lport *lport = port->lport;
2033853e2bd2SBhanu Gollapudi int task_idx, index;
2034853e2bd2SBhanu Gollapudi u16 xid;
2035853e2bd2SBhanu Gollapudi
2036dc6311ddSMaurizio Lombardi /* bnx2fc_post_io_req() is called with the tgt_lock held */
2037dc6311ddSMaurizio Lombardi
2038853e2bd2SBhanu Gollapudi /* Initialize rest of io_req fields */
2039853e2bd2SBhanu Gollapudi io_req->cmd_type = BNX2FC_SCSI_CMD;
2040853e2bd2SBhanu Gollapudi io_req->port = port;
2041853e2bd2SBhanu Gollapudi io_req->tgt = tgt;
2042853e2bd2SBhanu Gollapudi io_req->data_xfer_len = scsi_bufflen(sc_cmd);
2043f4b4216fSBart Van Assche bnx2fc_priv(sc_cmd)->io_req = io_req;
2044853e2bd2SBhanu Gollapudi
2045853e2bd2SBhanu Gollapudi if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) {
2046853e2bd2SBhanu Gollapudi io_req->io_req_flags = BNX2FC_READ;
2047a912460eSSebastian Andrzej Siewior this_cpu_inc(lport->stats->InputRequests);
2048a912460eSSebastian Andrzej Siewior this_cpu_add(lport->stats->InputBytes, io_req->data_xfer_len);
2049853e2bd2SBhanu Gollapudi } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
2050853e2bd2SBhanu Gollapudi io_req->io_req_flags = BNX2FC_WRITE;
2051a912460eSSebastian Andrzej Siewior this_cpu_inc(lport->stats->OutputRequests);
2052a912460eSSebastian Andrzej Siewior this_cpu_add(lport->stats->OutputBytes, io_req->data_xfer_len);
2053853e2bd2SBhanu Gollapudi } else {
2054853e2bd2SBhanu Gollapudi io_req->io_req_flags = 0;
2055a912460eSSebastian Andrzej Siewior this_cpu_inc(lport->stats->ControlRequests);
2056853e2bd2SBhanu Gollapudi }
2057853e2bd2SBhanu Gollapudi
2058853e2bd2SBhanu Gollapudi xid = io_req->xid;
2059853e2bd2SBhanu Gollapudi
2060853e2bd2SBhanu Gollapudi /* Build buffer descriptor list for firmware from sg list */
2061822f2903SBhanu Prakash Gollapudi if (bnx2fc_build_bd_list_from_sg(io_req)) {
2062822f2903SBhanu Prakash Gollapudi printk(KERN_ERR PFX "BD list creation failed\n");
2063822f2903SBhanu Prakash Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
2064822f2903SBhanu Prakash Gollapudi return -EAGAIN;
2065822f2903SBhanu Prakash Gollapudi }
2066853e2bd2SBhanu Gollapudi
2067853e2bd2SBhanu Gollapudi task_idx = xid / BNX2FC_TASKS_PER_PAGE;
2068853e2bd2SBhanu Gollapudi index = xid % BNX2FC_TASKS_PER_PAGE;
2069853e2bd2SBhanu Gollapudi
2070853e2bd2SBhanu Gollapudi /* Initialize task context for this IO request */
2071853e2bd2SBhanu Gollapudi task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx];
2072853e2bd2SBhanu Gollapudi task = &(task_page[index]);
2073853e2bd2SBhanu Gollapudi bnx2fc_init_task(io_req, task);
2074853e2bd2SBhanu Gollapudi
2075853e2bd2SBhanu Gollapudi if (tgt->flush_in_prog) {
2076853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Flush in progress..Host Busy\n");
2077853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
2078853e2bd2SBhanu Gollapudi return -EAGAIN;
2079853e2bd2SBhanu Gollapudi }
2080853e2bd2SBhanu Gollapudi
2081853e2bd2SBhanu Gollapudi if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
2082853e2bd2SBhanu Gollapudi printk(KERN_ERR PFX "Session not ready...post_io\n");
2083853e2bd2SBhanu Gollapudi kref_put(&io_req->refcount, bnx2fc_cmd_release);
2084853e2bd2SBhanu Gollapudi return -EAGAIN;
2085853e2bd2SBhanu Gollapudi }
2086853e2bd2SBhanu Gollapudi
2087853e2bd2SBhanu Gollapudi /* Time IO req */
2088b252f4c7SBhanu Prakash Gollapudi if (tgt->io_timeout)
2089853e2bd2SBhanu Gollapudi bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT);
2090853e2bd2SBhanu Gollapudi /* Obtain free SQ entry */
2091853e2bd2SBhanu Gollapudi bnx2fc_add_2_sq(tgt, xid);
2092853e2bd2SBhanu Gollapudi
2093853e2bd2SBhanu Gollapudi /* Enqueue the io_req to active_cmd_queue */
2094853e2bd2SBhanu Gollapudi
2095853e2bd2SBhanu Gollapudi io_req->on_active_queue = 1;
2096853e2bd2SBhanu Gollapudi /* move io_req from pending_queue to active_queue */
2097853e2bd2SBhanu Gollapudi list_add_tail(&io_req->link, &tgt->active_cmd_queue);
2098853e2bd2SBhanu Gollapudi
2099853e2bd2SBhanu Gollapudi /* Ring doorbell */
2100853e2bd2SBhanu Gollapudi bnx2fc_ring_doorbell(tgt);
2101853e2bd2SBhanu Gollapudi return 0;
2102853e2bd2SBhanu Gollapudi }
2103