Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 1 | /* bnx2fc_io.c: Broadcom NetXtreme II Linux FCoE offload driver. |
| 2 | * IO manager and SCSI IO processing. |
| 3 | * |
| 4 | * Copyright (c) 2008 - 2010 Broadcom Corporation |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation. |
| 9 | * |
| 10 | * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com) |
| 11 | */ |
| 12 | |
| 13 | #include "bnx2fc.h" |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 14 | |
| 15 | #define RESERVE_FREE_LIST_INDEX num_possible_cpus() |
| 16 | |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 17 | static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, |
| 18 | int bd_index); |
| 19 | static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req); |
| 20 | static void bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req); |
| 21 | static int bnx2fc_post_io_req(struct bnx2fc_rport *tgt, |
| 22 | struct bnx2fc_cmd *io_req); |
| 23 | static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req); |
| 24 | static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req); |
| 25 | static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, |
| 26 | struct fcoe_fcp_rsp_payload *fcp_rsp, |
| 27 | u8 num_rq); |
| 28 | |
| 29 | void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req, |
| 30 | unsigned int timer_msec) |
| 31 | { |
| 32 | struct bnx2fc_hba *hba = io_req->port->priv; |
| 33 | |
| 34 | if (queue_delayed_work(hba->timer_work_queue, &io_req->timeout_work, |
| 35 | msecs_to_jiffies(timer_msec))) |
| 36 | kref_get(&io_req->refcount); |
| 37 | } |
| 38 | |
| 39 | static void bnx2fc_cmd_timeout(struct work_struct *work) |
| 40 | { |
| 41 | struct bnx2fc_cmd *io_req = container_of(work, struct bnx2fc_cmd, |
| 42 | timeout_work.work); |
| 43 | struct fc_lport *lport; |
| 44 | struct fc_rport_priv *rdata; |
| 45 | u8 cmd_type = io_req->cmd_type; |
| 46 | struct bnx2fc_rport *tgt = io_req->tgt; |
| 47 | int logo_issued; |
| 48 | int rc; |
| 49 | |
| 50 | BNX2FC_IO_DBG(io_req, "cmd_timeout, cmd_type = %d," |
| 51 | "req_flags = %lx\n", cmd_type, io_req->req_flags); |
| 52 | |
| 53 | spin_lock_bh(&tgt->tgt_lock); |
| 54 | if (test_and_clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags)) { |
| 55 | clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); |
| 56 | /* |
| 57 | * ideally we should hold the io_req until RRQ complets, |
| 58 | * and release io_req from timeout hold. |
| 59 | */ |
| 60 | spin_unlock_bh(&tgt->tgt_lock); |
| 61 | bnx2fc_send_rrq(io_req); |
| 62 | return; |
| 63 | } |
| 64 | if (test_and_clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags)) { |
| 65 | BNX2FC_IO_DBG(io_req, "IO ready for reuse now\n"); |
| 66 | goto done; |
| 67 | } |
| 68 | |
| 69 | switch (cmd_type) { |
| 70 | case BNX2FC_SCSI_CMD: |
| 71 | if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, |
| 72 | &io_req->req_flags)) { |
| 73 | /* Handle eh_abort timeout */ |
| 74 | BNX2FC_IO_DBG(io_req, "eh_abort timed out\n"); |
| 75 | complete(&io_req->tm_done); |
| 76 | } else if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, |
| 77 | &io_req->req_flags)) { |
| 78 | /* Handle internally generated ABTS timeout */ |
| 79 | BNX2FC_IO_DBG(io_req, "ABTS timed out refcnt = %d\n", |
| 80 | io_req->refcount.refcount.counter); |
| 81 | if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, |
| 82 | &io_req->req_flags))) { |
| 83 | |
| 84 | lport = io_req->port->lport; |
| 85 | rdata = io_req->tgt->rdata; |
| 86 | logo_issued = test_and_set_bit( |
| 87 | BNX2FC_FLAG_EXPL_LOGO, |
| 88 | &tgt->flags); |
| 89 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 90 | spin_unlock_bh(&tgt->tgt_lock); |
| 91 | |
| 92 | /* Explicitly logo the target */ |
| 93 | if (!logo_issued) { |
| 94 | BNX2FC_IO_DBG(io_req, "Explicit " |
| 95 | "logo - tgt flags = 0x%lx\n", |
| 96 | tgt->flags); |
| 97 | |
| 98 | mutex_lock(&lport->disc.disc_mutex); |
| 99 | lport->tt.rport_logoff(rdata); |
| 100 | mutex_unlock(&lport->disc.disc_mutex); |
| 101 | } |
| 102 | return; |
| 103 | } |
| 104 | } else { |
| 105 | /* Hanlde IO timeout */ |
| 106 | BNX2FC_IO_DBG(io_req, "IO timed out. issue ABTS\n"); |
| 107 | if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, |
| 108 | &io_req->req_flags)) { |
| 109 | BNX2FC_IO_DBG(io_req, "IO completed before " |
| 110 | " timer expiry\n"); |
| 111 | goto done; |
| 112 | } |
| 113 | |
| 114 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, |
| 115 | &io_req->req_flags)) { |
| 116 | rc = bnx2fc_initiate_abts(io_req); |
| 117 | if (rc == SUCCESS) |
| 118 | goto done; |
| 119 | /* |
| 120 | * Explicitly logo the target if |
| 121 | * abts initiation fails |
| 122 | */ |
| 123 | lport = io_req->port->lport; |
| 124 | rdata = io_req->tgt->rdata; |
| 125 | logo_issued = test_and_set_bit( |
| 126 | BNX2FC_FLAG_EXPL_LOGO, |
| 127 | &tgt->flags); |
| 128 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 129 | spin_unlock_bh(&tgt->tgt_lock); |
| 130 | |
| 131 | if (!logo_issued) { |
| 132 | BNX2FC_IO_DBG(io_req, "Explicit " |
| 133 | "logo - tgt flags = 0x%lx\n", |
| 134 | tgt->flags); |
| 135 | |
| 136 | |
| 137 | mutex_lock(&lport->disc.disc_mutex); |
| 138 | lport->tt.rport_logoff(rdata); |
| 139 | mutex_unlock(&lport->disc.disc_mutex); |
| 140 | } |
| 141 | return; |
| 142 | } else { |
| 143 | BNX2FC_IO_DBG(io_req, "IO already in " |
| 144 | "ABTS processing\n"); |
| 145 | } |
| 146 | } |
| 147 | break; |
| 148 | case BNX2FC_ELS: |
| 149 | |
| 150 | if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { |
| 151 | BNX2FC_IO_DBG(io_req, "ABTS for ELS timed out\n"); |
| 152 | |
| 153 | if (!test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, |
| 154 | &io_req->req_flags)) { |
| 155 | lport = io_req->port->lport; |
| 156 | rdata = io_req->tgt->rdata; |
| 157 | logo_issued = test_and_set_bit( |
| 158 | BNX2FC_FLAG_EXPL_LOGO, |
| 159 | &tgt->flags); |
| 160 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 161 | spin_unlock_bh(&tgt->tgt_lock); |
| 162 | |
| 163 | /* Explicitly logo the target */ |
| 164 | if (!logo_issued) { |
| 165 | BNX2FC_IO_DBG(io_req, "Explicitly logo" |
| 166 | "(els)\n"); |
| 167 | mutex_lock(&lport->disc.disc_mutex); |
| 168 | lport->tt.rport_logoff(rdata); |
| 169 | mutex_unlock(&lport->disc.disc_mutex); |
| 170 | } |
| 171 | return; |
| 172 | } |
| 173 | } else { |
| 174 | /* |
| 175 | * Handle ELS timeout. |
| 176 | * tgt_lock is used to sync compl path and timeout |
| 177 | * path. If els compl path is processing this IO, we |
| 178 | * have nothing to do here, just release the timer hold |
| 179 | */ |
| 180 | BNX2FC_IO_DBG(io_req, "ELS timed out\n"); |
| 181 | if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE, |
| 182 | &io_req->req_flags)) |
| 183 | goto done; |
| 184 | |
| 185 | /* Indicate the cb_func that this ELS is timed out */ |
| 186 | set_bit(BNX2FC_FLAG_ELS_TIMEOUT, &io_req->req_flags); |
| 187 | |
| 188 | if ((io_req->cb_func) && (io_req->cb_arg)) { |
| 189 | io_req->cb_func(io_req->cb_arg); |
| 190 | io_req->cb_arg = NULL; |
| 191 | } |
| 192 | } |
| 193 | break; |
| 194 | default: |
| 195 | printk(KERN_ERR PFX "cmd_timeout: invalid cmd_type %d\n", |
| 196 | cmd_type); |
| 197 | break; |
| 198 | } |
| 199 | |
| 200 | done: |
| 201 | /* release the cmd that was held when timer was set */ |
| 202 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 203 | spin_unlock_bh(&tgt->tgt_lock); |
| 204 | } |
| 205 | |
| 206 | static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code) |
| 207 | { |
| 208 | /* Called with host lock held */ |
| 209 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; |
| 210 | |
| 211 | /* |
| 212 | * active_cmd_queue may have other command types as well, |
| 213 | * and during flush operation, we want to error back only |
| 214 | * scsi commands. |
| 215 | */ |
| 216 | if (io_req->cmd_type != BNX2FC_SCSI_CMD) |
| 217 | return; |
| 218 | |
| 219 | BNX2FC_IO_DBG(io_req, "scsi_done. err_code = 0x%x\n", err_code); |
| 220 | bnx2fc_unmap_sg_list(io_req); |
| 221 | io_req->sc_cmd = NULL; |
| 222 | if (!sc_cmd) { |
| 223 | printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. " |
| 224 | "IO(0x%x) already cleaned up\n", |
| 225 | io_req->xid); |
| 226 | return; |
| 227 | } |
| 228 | sc_cmd->result = err_code << 16; |
| 229 | |
| 230 | BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n", |
| 231 | sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries, |
| 232 | sc_cmd->allowed); |
| 233 | scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); |
| 234 | sc_cmd->SCp.ptr = NULL; |
| 235 | sc_cmd->scsi_done(sc_cmd); |
| 236 | } |
| 237 | |
| 238 | struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba, |
| 239 | u16 min_xid, u16 max_xid) |
| 240 | { |
| 241 | struct bnx2fc_cmd_mgr *cmgr; |
| 242 | struct io_bdt *bdt_info; |
| 243 | struct bnx2fc_cmd *io_req; |
| 244 | size_t len; |
| 245 | u32 mem_size; |
| 246 | u16 xid; |
| 247 | int i; |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 248 | int num_ios, num_pri_ios; |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 249 | size_t bd_tbl_sz; |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 250 | int arr_sz = num_possible_cpus() + 1; |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 251 | |
| 252 | if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) { |
| 253 | printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \ |
| 254 | and max_xid 0x%x\n", min_xid, max_xid); |
| 255 | return NULL; |
| 256 | } |
| 257 | BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid); |
| 258 | |
| 259 | num_ios = max_xid - min_xid + 1; |
| 260 | len = (num_ios * (sizeof(struct bnx2fc_cmd *))); |
| 261 | len += sizeof(struct bnx2fc_cmd_mgr); |
| 262 | |
| 263 | cmgr = kzalloc(len, GFP_KERNEL); |
| 264 | if (!cmgr) { |
| 265 | printk(KERN_ERR PFX "failed to alloc cmgr\n"); |
| 266 | return NULL; |
| 267 | } |
| 268 | |
| 269 | cmgr->free_list = kzalloc(sizeof(*cmgr->free_list) * |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 270 | arr_sz, GFP_KERNEL); |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 271 | if (!cmgr->free_list) { |
| 272 | printk(KERN_ERR PFX "failed to alloc free_list\n"); |
| 273 | goto mem_err; |
| 274 | } |
| 275 | |
| 276 | cmgr->free_list_lock = kzalloc(sizeof(*cmgr->free_list_lock) * |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 277 | arr_sz, GFP_KERNEL); |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 278 | if (!cmgr->free_list_lock) { |
| 279 | printk(KERN_ERR PFX "failed to alloc free_list_lock\n"); |
| 280 | goto mem_err; |
| 281 | } |
| 282 | |
| 283 | cmgr->hba = hba; |
| 284 | cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1); |
| 285 | |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 286 | for (i = 0; i < arr_sz; i++) { |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 287 | INIT_LIST_HEAD(&cmgr->free_list[i]); |
| 288 | spin_lock_init(&cmgr->free_list_lock[i]); |
| 289 | } |
| 290 | |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 291 | /* |
| 292 | * Pre-allocated pool of bnx2fc_cmds. |
| 293 | * Last entry in the free list array is the free list |
| 294 | * of slow path requests. |
| 295 | */ |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 296 | xid = BNX2FC_MIN_XID; |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 297 | num_pri_ios = num_ios - BNX2FC_ELSTM_XIDS; |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 298 | for (i = 0; i < num_ios; i++) { |
| 299 | io_req = kzalloc(sizeof(*io_req), GFP_KERNEL); |
| 300 | |
| 301 | if (!io_req) { |
| 302 | printk(KERN_ERR PFX "failed to alloc io_req\n"); |
| 303 | goto mem_err; |
| 304 | } |
| 305 | |
| 306 | INIT_LIST_HEAD(&io_req->link); |
| 307 | INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout); |
| 308 | |
| 309 | io_req->xid = xid++; |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 310 | if (i < num_pri_ios) |
| 311 | list_add_tail(&io_req->link, |
| 312 | &cmgr->free_list[io_req->xid % |
| 313 | num_possible_cpus()]); |
| 314 | else |
| 315 | list_add_tail(&io_req->link, |
| 316 | &cmgr->free_list[num_possible_cpus()]); |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 317 | io_req++; |
| 318 | } |
| 319 | |
| 320 | /* Allocate pool of io_bdts - one for each bnx2fc_cmd */ |
| 321 | mem_size = num_ios * sizeof(struct io_bdt *); |
| 322 | cmgr->io_bdt_pool = kmalloc(mem_size, GFP_KERNEL); |
| 323 | if (!cmgr->io_bdt_pool) { |
| 324 | printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n"); |
| 325 | goto mem_err; |
| 326 | } |
| 327 | |
| 328 | mem_size = sizeof(struct io_bdt); |
| 329 | for (i = 0; i < num_ios; i++) { |
| 330 | cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL); |
| 331 | if (!cmgr->io_bdt_pool[i]) { |
| 332 | printk(KERN_ERR PFX "failed to alloc " |
| 333 | "io_bdt_pool[%d]\n", i); |
| 334 | goto mem_err; |
| 335 | } |
| 336 | } |
| 337 | |
| 338 | /* Allocate an map fcoe_bdt_ctx structures */ |
| 339 | bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx); |
| 340 | for (i = 0; i < num_ios; i++) { |
| 341 | bdt_info = cmgr->io_bdt_pool[i]; |
| 342 | bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, |
| 343 | bd_tbl_sz, |
| 344 | &bdt_info->bd_tbl_dma, |
| 345 | GFP_KERNEL); |
| 346 | if (!bdt_info->bd_tbl) { |
| 347 | printk(KERN_ERR PFX "failed to alloc " |
| 348 | "bdt_tbl[%d]\n", i); |
| 349 | goto mem_err; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | return cmgr; |
| 354 | |
| 355 | mem_err: |
| 356 | bnx2fc_cmd_mgr_free(cmgr); |
| 357 | return NULL; |
| 358 | } |
| 359 | |
| 360 | void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr) |
| 361 | { |
| 362 | struct io_bdt *bdt_info; |
| 363 | struct bnx2fc_hba *hba = cmgr->hba; |
| 364 | size_t bd_tbl_sz; |
| 365 | u16 min_xid = BNX2FC_MIN_XID; |
| 366 | u16 max_xid = BNX2FC_MAX_XID; |
| 367 | int num_ios; |
| 368 | int i; |
| 369 | |
| 370 | num_ios = max_xid - min_xid + 1; |
| 371 | |
| 372 | /* Free fcoe_bdt_ctx structures */ |
| 373 | if (!cmgr->io_bdt_pool) |
| 374 | goto free_cmd_pool; |
| 375 | |
| 376 | bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx); |
| 377 | for (i = 0; i < num_ios; i++) { |
| 378 | bdt_info = cmgr->io_bdt_pool[i]; |
| 379 | if (bdt_info->bd_tbl) { |
| 380 | dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz, |
| 381 | bdt_info->bd_tbl, |
| 382 | bdt_info->bd_tbl_dma); |
| 383 | bdt_info->bd_tbl = NULL; |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | /* Destroy io_bdt pool */ |
| 388 | for (i = 0; i < num_ios; i++) { |
| 389 | kfree(cmgr->io_bdt_pool[i]); |
| 390 | cmgr->io_bdt_pool[i] = NULL; |
| 391 | } |
| 392 | |
| 393 | kfree(cmgr->io_bdt_pool); |
| 394 | cmgr->io_bdt_pool = NULL; |
| 395 | |
| 396 | free_cmd_pool: |
| 397 | kfree(cmgr->free_list_lock); |
| 398 | |
| 399 | /* Destroy cmd pool */ |
| 400 | if (!cmgr->free_list) |
| 401 | goto free_cmgr; |
| 402 | |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 403 | for (i = 0; i < num_possible_cpus() + 1; i++) { |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 404 | struct list_head *list; |
| 405 | struct list_head *tmp; |
| 406 | |
| 407 | list_for_each_safe(list, tmp, &cmgr->free_list[i]) { |
| 408 | struct bnx2fc_cmd *io_req = (struct bnx2fc_cmd *)list; |
| 409 | list_del(&io_req->link); |
| 410 | kfree(io_req); |
| 411 | } |
| 412 | } |
| 413 | kfree(cmgr->free_list); |
| 414 | free_cmgr: |
| 415 | /* Free command manager itself */ |
| 416 | kfree(cmgr); |
| 417 | } |
| 418 | |
| 419 | struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type) |
| 420 | { |
| 421 | struct fcoe_port *port = tgt->port; |
| 422 | struct bnx2fc_hba *hba = port->priv; |
| 423 | struct bnx2fc_cmd_mgr *cmd_mgr = hba->cmd_mgr; |
| 424 | struct bnx2fc_cmd *io_req; |
| 425 | struct list_head *listp; |
| 426 | struct io_bdt *bd_tbl; |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 427 | int index = RESERVE_FREE_LIST_INDEX; |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 428 | u32 max_sqes; |
| 429 | u16 xid; |
| 430 | |
| 431 | max_sqes = tgt->max_sqes; |
| 432 | switch (type) { |
| 433 | case BNX2FC_TASK_MGMT_CMD: |
| 434 | max_sqes = BNX2FC_TM_MAX_SQES; |
| 435 | break; |
| 436 | case BNX2FC_ELS: |
| 437 | max_sqes = BNX2FC_ELS_MAX_SQES; |
| 438 | break; |
| 439 | default: |
| 440 | break; |
| 441 | } |
| 442 | |
| 443 | /* |
| 444 | * NOTE: Free list insertions and deletions are protected with |
| 445 | * cmgr lock |
| 446 | */ |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 447 | spin_lock_bh(&cmd_mgr->free_list_lock[index]); |
| 448 | if ((list_empty(&(cmd_mgr->free_list[index]))) || |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 449 | (tgt->num_active_ios.counter >= max_sqes)) { |
| 450 | BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available " |
| 451 | "ios(%d):sqes(%d)\n", |
| 452 | tgt->num_active_ios.counter, tgt->max_sqes); |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 453 | if (list_empty(&(cmd_mgr->free_list[index]))) |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 454 | printk(KERN_ERR PFX "elstm_alloc: list_empty\n"); |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 455 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 456 | return NULL; |
| 457 | } |
| 458 | |
| 459 | listp = (struct list_head *) |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 460 | cmd_mgr->free_list[index].next; |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 461 | list_del_init(listp); |
| 462 | io_req = (struct bnx2fc_cmd *) listp; |
| 463 | xid = io_req->xid; |
| 464 | cmd_mgr->cmds[xid] = io_req; |
| 465 | atomic_inc(&tgt->num_active_ios); |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 466 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 467 | |
| 468 | INIT_LIST_HEAD(&io_req->link); |
| 469 | |
| 470 | io_req->port = port; |
| 471 | io_req->cmd_mgr = cmd_mgr; |
| 472 | io_req->req_flags = 0; |
| 473 | io_req->cmd_type = type; |
| 474 | |
| 475 | /* Bind io_bdt for this io_req */ |
| 476 | /* Have a static link between io_req and io_bdt_pool */ |
| 477 | bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; |
| 478 | bd_tbl->io_req = io_req; |
| 479 | |
| 480 | /* Hold the io_req against deletion */ |
| 481 | kref_init(&io_req->refcount); |
| 482 | return io_req; |
| 483 | } |
| 484 | static struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt) |
| 485 | { |
| 486 | struct fcoe_port *port = tgt->port; |
| 487 | struct bnx2fc_hba *hba = port->priv; |
| 488 | struct bnx2fc_cmd_mgr *cmd_mgr = hba->cmd_mgr; |
| 489 | struct bnx2fc_cmd *io_req; |
| 490 | struct list_head *listp; |
| 491 | struct io_bdt *bd_tbl; |
| 492 | u32 max_sqes; |
| 493 | u16 xid; |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 494 | int index = get_cpu(); |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 495 | |
| 496 | max_sqes = BNX2FC_SCSI_MAX_SQES; |
| 497 | /* |
| 498 | * NOTE: Free list insertions and deletions are protected with |
| 499 | * cmgr lock |
| 500 | */ |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 501 | spin_lock_bh(&cmd_mgr->free_list_lock[index]); |
| 502 | if ((list_empty(&cmd_mgr->free_list[index])) || |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 503 | (tgt->num_active_ios.counter >= max_sqes)) { |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 504 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
| 505 | put_cpu(); |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 506 | return NULL; |
| 507 | } |
| 508 | |
| 509 | listp = (struct list_head *) |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 510 | cmd_mgr->free_list[index].next; |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 511 | list_del_init(listp); |
| 512 | io_req = (struct bnx2fc_cmd *) listp; |
| 513 | xid = io_req->xid; |
| 514 | cmd_mgr->cmds[xid] = io_req; |
| 515 | atomic_inc(&tgt->num_active_ios); |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 516 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
| 517 | put_cpu(); |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 518 | |
| 519 | INIT_LIST_HEAD(&io_req->link); |
| 520 | |
| 521 | io_req->port = port; |
| 522 | io_req->cmd_mgr = cmd_mgr; |
| 523 | io_req->req_flags = 0; |
| 524 | |
| 525 | /* Bind io_bdt for this io_req */ |
| 526 | /* Have a static link between io_req and io_bdt_pool */ |
| 527 | bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; |
| 528 | bd_tbl->io_req = io_req; |
| 529 | |
| 530 | /* Hold the io_req against deletion */ |
| 531 | kref_init(&io_req->refcount); |
| 532 | return io_req; |
| 533 | } |
| 534 | |
| 535 | void bnx2fc_cmd_release(struct kref *ref) |
| 536 | { |
| 537 | struct bnx2fc_cmd *io_req = container_of(ref, |
| 538 | struct bnx2fc_cmd, refcount); |
| 539 | struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr; |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 540 | int index; |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 541 | |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 542 | if (io_req->cmd_type == BNX2FC_SCSI_CMD) |
| 543 | index = io_req->xid % num_possible_cpus(); |
| 544 | else |
| 545 | index = RESERVE_FREE_LIST_INDEX; |
| 546 | |
| 547 | |
| 548 | spin_lock_bh(&cmd_mgr->free_list_lock[index]); |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 549 | if (io_req->cmd_type != BNX2FC_SCSI_CMD) |
| 550 | bnx2fc_free_mp_resc(io_req); |
| 551 | cmd_mgr->cmds[io_req->xid] = NULL; |
| 552 | /* Delete IO from retire queue */ |
| 553 | list_del_init(&io_req->link); |
| 554 | /* Add it to the free list */ |
| 555 | list_add(&io_req->link, |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 556 | &cmd_mgr->free_list[index]); |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 557 | atomic_dec(&io_req->tgt->num_active_ios); |
Bhanu Gollapudi | 0ea5c27 | 2011-03-17 17:13:29 -0700 | [diff] [blame] | 558 | spin_unlock_bh(&cmd_mgr->free_list_lock[index]); |
| 559 | |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 560 | } |
| 561 | |
| 562 | static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req) |
| 563 | { |
| 564 | struct bnx2fc_mp_req *mp_req = &(io_req->mp_req); |
| 565 | struct bnx2fc_hba *hba = io_req->port->priv; |
| 566 | size_t sz = sizeof(struct fcoe_bd_ctx); |
| 567 | |
| 568 | /* clear tm flags */ |
| 569 | mp_req->tm_flags = 0; |
| 570 | if (mp_req->mp_req_bd) { |
| 571 | dma_free_coherent(&hba->pcidev->dev, sz, |
| 572 | mp_req->mp_req_bd, |
| 573 | mp_req->mp_req_bd_dma); |
| 574 | mp_req->mp_req_bd = NULL; |
| 575 | } |
| 576 | if (mp_req->mp_resp_bd) { |
| 577 | dma_free_coherent(&hba->pcidev->dev, sz, |
| 578 | mp_req->mp_resp_bd, |
| 579 | mp_req->mp_resp_bd_dma); |
| 580 | mp_req->mp_resp_bd = NULL; |
| 581 | } |
| 582 | if (mp_req->req_buf) { |
| 583 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, |
| 584 | mp_req->req_buf, |
| 585 | mp_req->req_buf_dma); |
| 586 | mp_req->req_buf = NULL; |
| 587 | } |
| 588 | if (mp_req->resp_buf) { |
| 589 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, |
| 590 | mp_req->resp_buf, |
| 591 | mp_req->resp_buf_dma); |
| 592 | mp_req->resp_buf = NULL; |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req) |
| 597 | { |
| 598 | struct bnx2fc_mp_req *mp_req; |
| 599 | struct fcoe_bd_ctx *mp_req_bd; |
| 600 | struct fcoe_bd_ctx *mp_resp_bd; |
| 601 | struct bnx2fc_hba *hba = io_req->port->priv; |
| 602 | dma_addr_t addr; |
| 603 | size_t sz; |
| 604 | |
| 605 | mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); |
| 606 | memset(mp_req, 0, sizeof(struct bnx2fc_mp_req)); |
| 607 | |
| 608 | mp_req->req_len = sizeof(struct fcp_cmnd); |
| 609 | io_req->data_xfer_len = mp_req->req_len; |
| 610 | mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, |
| 611 | &mp_req->req_buf_dma, |
| 612 | GFP_ATOMIC); |
| 613 | if (!mp_req->req_buf) { |
| 614 | printk(KERN_ERR PFX "unable to alloc MP req buffer\n"); |
| 615 | bnx2fc_free_mp_resc(io_req); |
| 616 | return FAILED; |
| 617 | } |
| 618 | |
| 619 | mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, |
| 620 | &mp_req->resp_buf_dma, |
| 621 | GFP_ATOMIC); |
| 622 | if (!mp_req->resp_buf) { |
| 623 | printk(KERN_ERR PFX "unable to alloc TM resp buffer\n"); |
| 624 | bnx2fc_free_mp_resc(io_req); |
| 625 | return FAILED; |
| 626 | } |
| 627 | memset(mp_req->req_buf, 0, PAGE_SIZE); |
| 628 | memset(mp_req->resp_buf, 0, PAGE_SIZE); |
| 629 | |
| 630 | /* Allocate and map mp_req_bd and mp_resp_bd */ |
| 631 | sz = sizeof(struct fcoe_bd_ctx); |
| 632 | mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, |
| 633 | &mp_req->mp_req_bd_dma, |
| 634 | GFP_ATOMIC); |
| 635 | if (!mp_req->mp_req_bd) { |
| 636 | printk(KERN_ERR PFX "unable to alloc MP req bd\n"); |
| 637 | bnx2fc_free_mp_resc(io_req); |
| 638 | return FAILED; |
| 639 | } |
| 640 | mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, |
| 641 | &mp_req->mp_resp_bd_dma, |
| 642 | GFP_ATOMIC); |
| 643 | if (!mp_req->mp_req_bd) { |
| 644 | printk(KERN_ERR PFX "unable to alloc MP resp bd\n"); |
| 645 | bnx2fc_free_mp_resc(io_req); |
| 646 | return FAILED; |
| 647 | } |
| 648 | /* Fill bd table */ |
| 649 | addr = mp_req->req_buf_dma; |
| 650 | mp_req_bd = mp_req->mp_req_bd; |
| 651 | mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff; |
| 652 | mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32); |
| 653 | mp_req_bd->buf_len = PAGE_SIZE; |
| 654 | mp_req_bd->flags = 0; |
| 655 | |
| 656 | /* |
| 657 | * MP buffer is either a task mgmt command or an ELS. |
| 658 | * So the assumption is that it consumes a single bd |
| 659 | * entry in the bd table |
| 660 | */ |
| 661 | mp_resp_bd = mp_req->mp_resp_bd; |
| 662 | addr = mp_req->resp_buf_dma; |
| 663 | mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff; |
| 664 | mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32); |
| 665 | mp_resp_bd->buf_len = PAGE_SIZE; |
| 666 | mp_resp_bd->flags = 0; |
| 667 | |
| 668 | return SUCCESS; |
| 669 | } |
| 670 | |
| 671 | static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags) |
| 672 | { |
| 673 | struct fc_lport *lport; |
| 674 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); |
| 675 | struct fc_rport_libfc_priv *rp = rport->dd_data; |
| 676 | struct fcoe_port *port; |
| 677 | struct bnx2fc_hba *hba; |
| 678 | struct bnx2fc_rport *tgt; |
| 679 | struct bnx2fc_cmd *io_req; |
| 680 | struct bnx2fc_mp_req *tm_req; |
| 681 | struct fcoe_task_ctx_entry *task; |
| 682 | struct fcoe_task_ctx_entry *task_page; |
| 683 | struct Scsi_Host *host = sc_cmd->device->host; |
| 684 | struct fc_frame_header *fc_hdr; |
| 685 | struct fcp_cmnd *fcp_cmnd; |
| 686 | int task_idx, index; |
| 687 | int rc = SUCCESS; |
| 688 | u16 xid; |
| 689 | u32 sid, did; |
| 690 | unsigned long start = jiffies; |
| 691 | |
| 692 | lport = shost_priv(host); |
| 693 | port = lport_priv(lport); |
| 694 | hba = port->priv; |
| 695 | |
| 696 | if (rport == NULL) { |
| 697 | printk(KERN_ALERT PFX "device_reset: rport is NULL\n"); |
| 698 | rc = FAILED; |
| 699 | goto tmf_err; |
| 700 | } |
| 701 | |
| 702 | rc = fc_block_scsi_eh(sc_cmd); |
| 703 | if (rc) |
| 704 | return rc; |
| 705 | |
| 706 | if (lport->state != LPORT_ST_READY || !(lport->link_up)) { |
| 707 | printk(KERN_ERR PFX "device_reset: link is not ready\n"); |
| 708 | rc = FAILED; |
| 709 | goto tmf_err; |
| 710 | } |
| 711 | /* rport and tgt are allocated together, so tgt should be non-NULL */ |
| 712 | tgt = (struct bnx2fc_rport *)&rp[1]; |
| 713 | |
| 714 | if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) { |
| 715 | printk(KERN_ERR PFX "device_reset: tgt not offloaded\n"); |
| 716 | rc = FAILED; |
| 717 | goto tmf_err; |
| 718 | } |
| 719 | retry_tmf: |
| 720 | io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD); |
| 721 | if (!io_req) { |
| 722 | if (time_after(jiffies, start + HZ)) { |
| 723 | printk(KERN_ERR PFX "tmf: Failed TMF"); |
| 724 | rc = FAILED; |
| 725 | goto tmf_err; |
| 726 | } |
| 727 | msleep(20); |
| 728 | goto retry_tmf; |
| 729 | } |
| 730 | /* Initialize rest of io_req fields */ |
| 731 | io_req->sc_cmd = sc_cmd; |
| 732 | io_req->port = port; |
| 733 | io_req->tgt = tgt; |
| 734 | |
| 735 | tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); |
| 736 | |
| 737 | rc = bnx2fc_init_mp_req(io_req); |
| 738 | if (rc == FAILED) { |
| 739 | printk(KERN_ERR PFX "Task mgmt MP request init failed\n"); |
| 740 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 741 | goto tmf_err; |
| 742 | } |
| 743 | |
| 744 | /* Set TM flags */ |
| 745 | io_req->io_req_flags = 0; |
| 746 | tm_req->tm_flags = tm_flags; |
| 747 | |
| 748 | /* Fill FCP_CMND */ |
| 749 | bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf); |
| 750 | fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf; |
| 751 | memset(fcp_cmnd->fc_cdb, 0, sc_cmd->cmd_len); |
| 752 | fcp_cmnd->fc_dl = 0; |
| 753 | |
| 754 | /* Fill FC header */ |
| 755 | fc_hdr = &(tm_req->req_fc_hdr); |
| 756 | sid = tgt->sid; |
| 757 | did = rport->port_id; |
| 758 | __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid, |
| 759 | FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | |
| 760 | FC_FC_SEQ_INIT, 0); |
| 761 | /* Obtain exchange id */ |
| 762 | xid = io_req->xid; |
| 763 | |
| 764 | BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid); |
| 765 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; |
| 766 | index = xid % BNX2FC_TASKS_PER_PAGE; |
| 767 | |
| 768 | /* Initialize task context for this IO request */ |
| 769 | task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx]; |
| 770 | task = &(task_page[index]); |
| 771 | bnx2fc_init_mp_task(io_req, task); |
| 772 | |
| 773 | sc_cmd->SCp.ptr = (char *)io_req; |
| 774 | |
| 775 | /* Obtain free SQ entry */ |
| 776 | spin_lock_bh(&tgt->tgt_lock); |
| 777 | bnx2fc_add_2_sq(tgt, xid); |
| 778 | |
| 779 | /* Enqueue the io_req to active_tm_queue */ |
| 780 | io_req->on_tmf_queue = 1; |
| 781 | list_add_tail(&io_req->link, &tgt->active_tm_queue); |
| 782 | |
| 783 | init_completion(&io_req->tm_done); |
| 784 | io_req->wait_for_comp = 1; |
| 785 | |
| 786 | /* Ring doorbell */ |
| 787 | bnx2fc_ring_doorbell(tgt); |
| 788 | spin_unlock_bh(&tgt->tgt_lock); |
| 789 | |
| 790 | rc = wait_for_completion_timeout(&io_req->tm_done, |
| 791 | BNX2FC_TM_TIMEOUT * HZ); |
| 792 | spin_lock_bh(&tgt->tgt_lock); |
| 793 | |
| 794 | io_req->wait_for_comp = 0; |
| 795 | if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) |
| 796 | set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags); |
| 797 | |
| 798 | spin_unlock_bh(&tgt->tgt_lock); |
| 799 | |
| 800 | if (!rc) { |
| 801 | printk(KERN_ERR PFX "task mgmt command failed...\n"); |
| 802 | rc = FAILED; |
| 803 | } else { |
| 804 | printk(KERN_ERR PFX "task mgmt command success...\n"); |
| 805 | rc = SUCCESS; |
| 806 | } |
| 807 | tmf_err: |
| 808 | return rc; |
| 809 | } |
| 810 | |
| 811 | int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req) |
| 812 | { |
| 813 | struct fc_lport *lport; |
| 814 | struct bnx2fc_rport *tgt = io_req->tgt; |
| 815 | struct fc_rport *rport = tgt->rport; |
| 816 | struct fc_rport_priv *rdata = tgt->rdata; |
| 817 | struct bnx2fc_hba *hba; |
| 818 | struct fcoe_port *port; |
| 819 | struct bnx2fc_cmd *abts_io_req; |
| 820 | struct fcoe_task_ctx_entry *task; |
| 821 | struct fcoe_task_ctx_entry *task_page; |
| 822 | struct fc_frame_header *fc_hdr; |
| 823 | struct bnx2fc_mp_req *abts_req; |
| 824 | int task_idx, index; |
| 825 | u32 sid, did; |
| 826 | u16 xid; |
| 827 | int rc = SUCCESS; |
| 828 | u32 r_a_tov = rdata->r_a_tov; |
| 829 | |
| 830 | /* called with tgt_lock held */ |
| 831 | BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n"); |
| 832 | |
| 833 | port = io_req->port; |
| 834 | hba = port->priv; |
| 835 | lport = port->lport; |
| 836 | |
| 837 | if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { |
| 838 | printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n"); |
| 839 | rc = FAILED; |
| 840 | goto abts_err; |
| 841 | } |
| 842 | |
| 843 | if (rport == NULL) { |
| 844 | printk(KERN_ALERT PFX "initiate_abts: rport is NULL\n"); |
| 845 | rc = FAILED; |
| 846 | goto abts_err; |
| 847 | } |
| 848 | |
| 849 | if (lport->state != LPORT_ST_READY || !(lport->link_up)) { |
| 850 | printk(KERN_ERR PFX "initiate_abts: link is not ready\n"); |
| 851 | rc = FAILED; |
| 852 | goto abts_err; |
| 853 | } |
| 854 | |
| 855 | abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS); |
| 856 | if (!abts_io_req) { |
| 857 | printk(KERN_ERR PFX "abts: couldnt allocate cmd\n"); |
| 858 | rc = FAILED; |
| 859 | goto abts_err; |
| 860 | } |
| 861 | |
| 862 | /* Initialize rest of io_req fields */ |
| 863 | abts_io_req->sc_cmd = NULL; |
| 864 | abts_io_req->port = port; |
| 865 | abts_io_req->tgt = tgt; |
| 866 | abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */ |
| 867 | |
| 868 | abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req); |
| 869 | memset(abts_req, 0, sizeof(struct bnx2fc_mp_req)); |
| 870 | |
| 871 | /* Fill FC header */ |
| 872 | fc_hdr = &(abts_req->req_fc_hdr); |
| 873 | |
| 874 | /* Obtain oxid and rxid for the original exchange to be aborted */ |
| 875 | fc_hdr->fh_ox_id = htons(io_req->xid); |
| 876 | fc_hdr->fh_rx_id = htons(io_req->task->rx_wr_tx_rd.rx_id); |
| 877 | |
| 878 | sid = tgt->sid; |
| 879 | did = rport->port_id; |
| 880 | |
| 881 | __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid, |
| 882 | FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | |
| 883 | FC_FC_SEQ_INIT, 0); |
| 884 | |
| 885 | xid = abts_io_req->xid; |
| 886 | BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n"); |
| 887 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; |
| 888 | index = xid % BNX2FC_TASKS_PER_PAGE; |
| 889 | |
| 890 | /* Initialize task context for this IO request */ |
| 891 | task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx]; |
| 892 | task = &(task_page[index]); |
| 893 | bnx2fc_init_mp_task(abts_io_req, task); |
| 894 | |
| 895 | /* |
| 896 | * ABTS task is a temporary task that will be cleaned up |
| 897 | * irrespective of ABTS response. We need to start the timer |
| 898 | * for the original exchange, as the CQE is posted for the original |
| 899 | * IO request. |
| 900 | * |
| 901 | * Timer for ABTS is started only when it is originated by a |
| 902 | * TM request. For the ABTS issued as part of ULP timeout, |
| 903 | * scsi-ml maintains the timers. |
| 904 | */ |
| 905 | |
| 906 | /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/ |
| 907 | bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov); |
| 908 | |
| 909 | /* Obtain free SQ entry */ |
| 910 | bnx2fc_add_2_sq(tgt, xid); |
| 911 | |
| 912 | /* Ring doorbell */ |
| 913 | bnx2fc_ring_doorbell(tgt); |
| 914 | |
| 915 | abts_err: |
| 916 | return rc; |
| 917 | } |
| 918 | |
| 919 | int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req) |
| 920 | { |
| 921 | struct fc_lport *lport; |
| 922 | struct bnx2fc_rport *tgt = io_req->tgt; |
| 923 | struct bnx2fc_hba *hba; |
| 924 | struct fcoe_port *port; |
| 925 | struct bnx2fc_cmd *cleanup_io_req; |
| 926 | struct fcoe_task_ctx_entry *task; |
| 927 | struct fcoe_task_ctx_entry *task_page; |
| 928 | int task_idx, index; |
| 929 | u16 xid, orig_xid; |
| 930 | int rc = 0; |
| 931 | |
| 932 | /* ASSUMPTION: called with tgt_lock held */ |
| 933 | BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n"); |
| 934 | |
| 935 | port = io_req->port; |
| 936 | hba = port->priv; |
| 937 | lport = port->lport; |
| 938 | |
| 939 | cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP); |
| 940 | if (!cleanup_io_req) { |
| 941 | printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n"); |
| 942 | rc = -1; |
| 943 | goto cleanup_err; |
| 944 | } |
| 945 | |
| 946 | /* Initialize rest of io_req fields */ |
| 947 | cleanup_io_req->sc_cmd = NULL; |
| 948 | cleanup_io_req->port = port; |
| 949 | cleanup_io_req->tgt = tgt; |
| 950 | cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */ |
| 951 | |
| 952 | xid = cleanup_io_req->xid; |
| 953 | |
| 954 | task_idx = xid/BNX2FC_TASKS_PER_PAGE; |
| 955 | index = xid % BNX2FC_TASKS_PER_PAGE; |
| 956 | |
| 957 | /* Initialize task context for this IO request */ |
| 958 | task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx]; |
| 959 | task = &(task_page[index]); |
| 960 | orig_xid = io_req->xid; |
| 961 | |
| 962 | BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid); |
| 963 | |
| 964 | bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid); |
| 965 | |
| 966 | /* Obtain free SQ entry */ |
| 967 | bnx2fc_add_2_sq(tgt, xid); |
| 968 | |
| 969 | /* Ring doorbell */ |
| 970 | bnx2fc_ring_doorbell(tgt); |
| 971 | |
| 972 | cleanup_err: |
| 973 | return rc; |
| 974 | } |
| 975 | |
| 976 | /** |
| 977 | * bnx2fc_eh_target_reset: Reset a target |
| 978 | * |
| 979 | * @sc_cmd: SCSI command |
| 980 | * |
| 981 | * Set from SCSI host template to send task mgmt command to the target |
| 982 | * and wait for the response |
| 983 | */ |
| 984 | int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd) |
| 985 | { |
| 986 | return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET); |
| 987 | } |
| 988 | |
| 989 | /** |
| 990 | * bnx2fc_eh_device_reset - Reset a single LUN |
| 991 | * |
| 992 | * @sc_cmd: SCSI command |
| 993 | * |
| 994 | * Set from SCSI host template to send task mgmt command to the target |
| 995 | * and wait for the response |
| 996 | */ |
| 997 | int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd) |
| 998 | { |
| 999 | return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET); |
| 1000 | } |
| 1001 | |
| 1002 | /** |
| 1003 | * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding |
| 1004 | * SCSI command |
| 1005 | * |
| 1006 | * @sc_cmd: SCSI_ML command pointer |
| 1007 | * |
| 1008 | * SCSI abort request handler |
| 1009 | */ |
| 1010 | int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd) |
| 1011 | { |
| 1012 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); |
| 1013 | struct fc_rport_libfc_priv *rp = rport->dd_data; |
| 1014 | struct bnx2fc_cmd *io_req; |
| 1015 | struct fc_lport *lport; |
| 1016 | struct bnx2fc_rport *tgt; |
| 1017 | int rc = FAILED; |
| 1018 | |
| 1019 | |
| 1020 | rc = fc_block_scsi_eh(sc_cmd); |
| 1021 | if (rc) |
| 1022 | return rc; |
| 1023 | |
| 1024 | lport = shost_priv(sc_cmd->device->host); |
| 1025 | if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { |
| 1026 | printk(KERN_ALERT PFX "eh_abort: link not ready\n"); |
| 1027 | return rc; |
| 1028 | } |
| 1029 | |
| 1030 | tgt = (struct bnx2fc_rport *)&rp[1]; |
| 1031 | |
| 1032 | BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n"); |
| 1033 | |
| 1034 | spin_lock_bh(&tgt->tgt_lock); |
| 1035 | io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr; |
| 1036 | if (!io_req) { |
| 1037 | /* Command might have just completed */ |
| 1038 | printk(KERN_ERR PFX "eh_abort: io_req is NULL\n"); |
| 1039 | spin_unlock_bh(&tgt->tgt_lock); |
| 1040 | return SUCCESS; |
| 1041 | } |
| 1042 | BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n", |
| 1043 | io_req->refcount.refcount.counter); |
| 1044 | |
| 1045 | /* Hold IO request across abort processing */ |
| 1046 | kref_get(&io_req->refcount); |
| 1047 | |
| 1048 | BUG_ON(tgt != io_req->tgt); |
| 1049 | |
| 1050 | /* Remove the io_req from the active_q. */ |
| 1051 | /* |
| 1052 | * Task Mgmt functions (LUN RESET & TGT RESET) will not |
| 1053 | * issue an ABTS on this particular IO req, as the |
| 1054 | * io_req is no longer in the active_q. |
| 1055 | */ |
| 1056 | if (tgt->flush_in_prog) { |
| 1057 | printk(KERN_ALERT PFX "eh_abort: io_req (xid = 0x%x) " |
| 1058 | "flush in progress\n", io_req->xid); |
| 1059 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 1060 | spin_unlock_bh(&tgt->tgt_lock); |
| 1061 | return SUCCESS; |
| 1062 | } |
| 1063 | |
| 1064 | if (io_req->on_active_queue == 0) { |
| 1065 | printk(KERN_ALERT PFX "eh_abort: io_req (xid = 0x%x) " |
| 1066 | "not on active_q\n", io_req->xid); |
| 1067 | /* |
| 1068 | * This condition can happen only due to the FW bug, |
| 1069 | * where we do not receive cleanup response from |
| 1070 | * the FW. Handle this case gracefully by erroring |
| 1071 | * back the IO request to SCSI-ml |
| 1072 | */ |
| 1073 | bnx2fc_scsi_done(io_req, DID_ABORT); |
| 1074 | |
| 1075 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 1076 | spin_unlock_bh(&tgt->tgt_lock); |
| 1077 | return SUCCESS; |
| 1078 | } |
| 1079 | |
| 1080 | /* |
| 1081 | * Only eh_abort processing will remove the IO from |
| 1082 | * active_cmd_q before processing the request. this is |
| 1083 | * done to avoid race conditions between IOs aborted |
| 1084 | * as part of task management completion and eh_abort |
| 1085 | * processing |
| 1086 | */ |
| 1087 | list_del_init(&io_req->link); |
| 1088 | io_req->on_active_queue = 0; |
| 1089 | /* Move IO req to retire queue */ |
| 1090 | list_add_tail(&io_req->link, &tgt->io_retire_queue); |
| 1091 | |
| 1092 | init_completion(&io_req->tm_done); |
| 1093 | io_req->wait_for_comp = 1; |
| 1094 | |
| 1095 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { |
| 1096 | /* Cancel the current timer running on this io_req */ |
| 1097 | if (cancel_delayed_work(&io_req->timeout_work)) |
| 1098 | kref_put(&io_req->refcount, |
| 1099 | bnx2fc_cmd_release); /* drop timer hold */ |
| 1100 | set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags); |
| 1101 | rc = bnx2fc_initiate_abts(io_req); |
| 1102 | } else { |
| 1103 | printk(KERN_ALERT PFX "eh_abort: io_req (xid = 0x%x) " |
| 1104 | "already in abts processing\n", io_req->xid); |
| 1105 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 1106 | spin_unlock_bh(&tgt->tgt_lock); |
| 1107 | return SUCCESS; |
| 1108 | } |
| 1109 | if (rc == FAILED) { |
| 1110 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 1111 | spin_unlock_bh(&tgt->tgt_lock); |
| 1112 | return rc; |
| 1113 | } |
| 1114 | spin_unlock_bh(&tgt->tgt_lock); |
| 1115 | |
| 1116 | wait_for_completion(&io_req->tm_done); |
| 1117 | |
| 1118 | spin_lock_bh(&tgt->tgt_lock); |
| 1119 | io_req->wait_for_comp = 0; |
| 1120 | if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, |
| 1121 | &io_req->req_flags))) { |
| 1122 | /* Let the scsi-ml try to recover this command */ |
| 1123 | printk(KERN_ERR PFX "abort failed, xid = 0x%x\n", |
| 1124 | io_req->xid); |
| 1125 | rc = FAILED; |
| 1126 | } else { |
| 1127 | /* |
| 1128 | * We come here even when there was a race condition |
| 1129 | * between timeout and abts completion, and abts |
| 1130 | * completion happens just in time. |
| 1131 | */ |
| 1132 | BNX2FC_IO_DBG(io_req, "abort succeeded\n"); |
| 1133 | rc = SUCCESS; |
| 1134 | bnx2fc_scsi_done(io_req, DID_ABORT); |
| 1135 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 1136 | } |
| 1137 | |
| 1138 | /* release the reference taken in eh_abort */ |
| 1139 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 1140 | spin_unlock_bh(&tgt->tgt_lock); |
| 1141 | return rc; |
| 1142 | } |
| 1143 | |
| 1144 | void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req, |
| 1145 | struct fcoe_task_ctx_entry *task, |
| 1146 | u8 num_rq) |
| 1147 | { |
| 1148 | BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl " |
| 1149 | "refcnt = %d, cmd_type = %d\n", |
| 1150 | io_req->refcount.refcount.counter, io_req->cmd_type); |
| 1151 | bnx2fc_scsi_done(io_req, DID_ERROR); |
| 1152 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 1153 | } |
| 1154 | |
| 1155 | void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req, |
| 1156 | struct fcoe_task_ctx_entry *task, |
| 1157 | u8 num_rq) |
| 1158 | { |
| 1159 | u32 r_ctl; |
| 1160 | u32 r_a_tov = FC_DEF_R_A_TOV; |
| 1161 | u8 issue_rrq = 0; |
| 1162 | struct bnx2fc_rport *tgt = io_req->tgt; |
| 1163 | |
| 1164 | BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x" |
| 1165 | "refcnt = %d, cmd_type = %d\n", |
| 1166 | io_req->xid, |
| 1167 | io_req->refcount.refcount.counter, io_req->cmd_type); |
| 1168 | |
| 1169 | if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, |
| 1170 | &io_req->req_flags)) { |
| 1171 | BNX2FC_IO_DBG(io_req, "Timer context finished processing" |
| 1172 | " this io\n"); |
| 1173 | return; |
| 1174 | } |
| 1175 | |
| 1176 | /* Do not issue RRQ as this IO is already cleanedup */ |
| 1177 | if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP, |
| 1178 | &io_req->req_flags)) |
| 1179 | goto io_compl; |
| 1180 | |
| 1181 | /* |
| 1182 | * For ABTS issued due to SCSI eh_abort_handler, timeout |
| 1183 | * values are maintained by scsi-ml itself. Cancel timeout |
| 1184 | * in case ABTS issued as part of task management function |
| 1185 | * or due to FW error. |
| 1186 | */ |
| 1187 | if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) |
| 1188 | if (cancel_delayed_work(&io_req->timeout_work)) |
| 1189 | kref_put(&io_req->refcount, |
| 1190 | bnx2fc_cmd_release); /* drop timer hold */ |
| 1191 | |
| 1192 | r_ctl = task->cmn.general.rsp_info.abts_rsp.r_ctl; |
| 1193 | |
| 1194 | switch (r_ctl) { |
| 1195 | case FC_RCTL_BA_ACC: |
| 1196 | /* |
| 1197 | * Dont release this cmd yet. It will be relesed |
| 1198 | * after we get RRQ response |
| 1199 | */ |
| 1200 | BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n"); |
| 1201 | issue_rrq = 1; |
| 1202 | break; |
| 1203 | |
| 1204 | case FC_RCTL_BA_RJT: |
| 1205 | BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n"); |
| 1206 | break; |
| 1207 | default: |
| 1208 | printk(KERN_ERR PFX "Unknown ABTS response\n"); |
| 1209 | break; |
| 1210 | } |
| 1211 | |
| 1212 | if (issue_rrq) { |
| 1213 | BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n"); |
| 1214 | set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags); |
| 1215 | } |
| 1216 | set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); |
| 1217 | bnx2fc_cmd_timer_set(io_req, r_a_tov); |
| 1218 | |
| 1219 | io_compl: |
| 1220 | if (io_req->wait_for_comp) { |
| 1221 | if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, |
| 1222 | &io_req->req_flags)) |
| 1223 | complete(&io_req->tm_done); |
| 1224 | } else { |
| 1225 | /* |
| 1226 | * We end up here when ABTS is issued as |
| 1227 | * in asynchronous context, i.e., as part |
| 1228 | * of task management completion, or |
| 1229 | * when FW error is received or when the |
| 1230 | * ABTS is issued when the IO is timed |
| 1231 | * out. |
| 1232 | */ |
| 1233 | |
| 1234 | if (io_req->on_active_queue) { |
| 1235 | list_del_init(&io_req->link); |
| 1236 | io_req->on_active_queue = 0; |
| 1237 | /* Move IO req to retire queue */ |
| 1238 | list_add_tail(&io_req->link, &tgt->io_retire_queue); |
| 1239 | } |
| 1240 | bnx2fc_scsi_done(io_req, DID_ERROR); |
| 1241 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 1242 | } |
| 1243 | } |
| 1244 | |
| 1245 | static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req) |
| 1246 | { |
| 1247 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; |
| 1248 | struct bnx2fc_rport *tgt = io_req->tgt; |
| 1249 | struct list_head *list; |
| 1250 | struct list_head *tmp; |
| 1251 | struct bnx2fc_cmd *cmd; |
| 1252 | int tm_lun = sc_cmd->device->lun; |
| 1253 | int rc = 0; |
| 1254 | int lun; |
| 1255 | |
| 1256 | /* called with tgt_lock held */ |
| 1257 | BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n"); |
| 1258 | /* |
| 1259 | * Walk thru the active_ios queue and ABORT the IO |
| 1260 | * that matches with the LUN that was reset |
| 1261 | */ |
| 1262 | list_for_each_safe(list, tmp, &tgt->active_cmd_queue) { |
| 1263 | BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n"); |
| 1264 | cmd = (struct bnx2fc_cmd *)list; |
| 1265 | lun = cmd->sc_cmd->device->lun; |
| 1266 | if (lun == tm_lun) { |
| 1267 | /* Initiate ABTS on this cmd */ |
| 1268 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, |
| 1269 | &cmd->req_flags)) { |
| 1270 | /* cancel the IO timeout */ |
| 1271 | if (cancel_delayed_work(&io_req->timeout_work)) |
| 1272 | kref_put(&io_req->refcount, |
| 1273 | bnx2fc_cmd_release); |
| 1274 | /* timer hold */ |
| 1275 | rc = bnx2fc_initiate_abts(cmd); |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1276 | /* abts shouldn't fail in this context */ |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 1277 | WARN_ON(rc != SUCCESS); |
| 1278 | } else |
| 1279 | printk(KERN_ERR PFX "lun_rst: abts already in" |
| 1280 | " progress for this IO 0x%x\n", |
| 1281 | cmd->xid); |
| 1282 | } |
| 1283 | } |
| 1284 | } |
| 1285 | |
| 1286 | static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req) |
| 1287 | { |
| 1288 | struct bnx2fc_rport *tgt = io_req->tgt; |
| 1289 | struct list_head *list; |
| 1290 | struct list_head *tmp; |
| 1291 | struct bnx2fc_cmd *cmd; |
| 1292 | int rc = 0; |
| 1293 | |
| 1294 | /* called with tgt_lock held */ |
| 1295 | BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n"); |
| 1296 | /* |
| 1297 | * Walk thru the active_ios queue and ABORT the IO |
| 1298 | * that matches with the LUN that was reset |
| 1299 | */ |
| 1300 | list_for_each_safe(list, tmp, &tgt->active_cmd_queue) { |
| 1301 | BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n"); |
| 1302 | cmd = (struct bnx2fc_cmd *)list; |
| 1303 | /* Initiate ABTS */ |
| 1304 | if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, |
| 1305 | &cmd->req_flags)) { |
| 1306 | /* cancel the IO timeout */ |
| 1307 | if (cancel_delayed_work(&io_req->timeout_work)) |
| 1308 | kref_put(&io_req->refcount, |
| 1309 | bnx2fc_cmd_release); /* timer hold */ |
| 1310 | rc = bnx2fc_initiate_abts(cmd); |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1311 | /* abts shouldn't fail in this context */ |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 1312 | WARN_ON(rc != SUCCESS); |
| 1313 | |
| 1314 | } else |
| 1315 | printk(KERN_ERR PFX "tgt_rst: abts already in progress" |
| 1316 | " for this IO 0x%x\n", cmd->xid); |
| 1317 | } |
| 1318 | } |
| 1319 | |
| 1320 | void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req, |
| 1321 | struct fcoe_task_ctx_entry *task, u8 num_rq) |
| 1322 | { |
| 1323 | struct bnx2fc_mp_req *tm_req; |
| 1324 | struct fc_frame_header *fc_hdr; |
| 1325 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; |
| 1326 | u64 *hdr; |
| 1327 | u64 *temp_hdr; |
| 1328 | void *rsp_buf; |
| 1329 | |
| 1330 | /* Called with tgt_lock held */ |
| 1331 | BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n"); |
| 1332 | |
| 1333 | if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags))) |
| 1334 | set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags); |
| 1335 | else { |
| 1336 | /* TM has already timed out and we got |
| 1337 | * delayed completion. Ignore completion |
| 1338 | * processing. |
| 1339 | */ |
| 1340 | return; |
| 1341 | } |
| 1342 | |
| 1343 | tm_req = &(io_req->mp_req); |
| 1344 | fc_hdr = &(tm_req->resp_fc_hdr); |
| 1345 | hdr = (u64 *)fc_hdr; |
| 1346 | temp_hdr = (u64 *) |
| 1347 | &task->cmn.general.cmd_info.mp_fc_frame.fc_hdr; |
| 1348 | hdr[0] = cpu_to_be64(temp_hdr[0]); |
| 1349 | hdr[1] = cpu_to_be64(temp_hdr[1]); |
| 1350 | hdr[2] = cpu_to_be64(temp_hdr[2]); |
| 1351 | |
| 1352 | tm_req->resp_len = task->rx_wr_only.sgl_ctx.mul_sges.cur_sge_off; |
| 1353 | |
| 1354 | rsp_buf = tm_req->resp_buf; |
| 1355 | |
| 1356 | if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) { |
| 1357 | bnx2fc_parse_fcp_rsp(io_req, |
| 1358 | (struct fcoe_fcp_rsp_payload *) |
| 1359 | rsp_buf, num_rq); |
| 1360 | if (io_req->fcp_rsp_code == 0) { |
| 1361 | /* TM successful */ |
| 1362 | if (tm_req->tm_flags & FCP_TMF_LUN_RESET) |
| 1363 | bnx2fc_lun_reset_cmpl(io_req); |
| 1364 | else if (tm_req->tm_flags & FCP_TMF_TGT_RESET) |
| 1365 | bnx2fc_tgt_reset_cmpl(io_req); |
| 1366 | } |
| 1367 | } else { |
| 1368 | printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n", |
| 1369 | fc_hdr->fh_r_ctl); |
| 1370 | } |
| 1371 | if (!sc_cmd->SCp.ptr) { |
| 1372 | printk(KERN_ALERT PFX "tm_compl: SCp.ptr is NULL\n"); |
| 1373 | return; |
| 1374 | } |
| 1375 | switch (io_req->fcp_status) { |
| 1376 | case FC_GOOD: |
| 1377 | if (io_req->cdb_status == 0) { |
| 1378 | /* Good IO completion */ |
| 1379 | sc_cmd->result = DID_OK << 16; |
| 1380 | } else { |
| 1381 | /* Transport status is good, SCSI status not good */ |
| 1382 | sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; |
| 1383 | } |
| 1384 | if (io_req->fcp_resid) |
| 1385 | scsi_set_resid(sc_cmd, io_req->fcp_resid); |
| 1386 | break; |
| 1387 | |
| 1388 | default: |
| 1389 | BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n", |
| 1390 | io_req->fcp_status); |
| 1391 | break; |
| 1392 | } |
| 1393 | |
| 1394 | sc_cmd = io_req->sc_cmd; |
| 1395 | io_req->sc_cmd = NULL; |
| 1396 | |
| 1397 | /* check if the io_req exists in tgt's tmf_q */ |
| 1398 | if (io_req->on_tmf_queue) { |
| 1399 | |
| 1400 | list_del_init(&io_req->link); |
| 1401 | io_req->on_tmf_queue = 0; |
| 1402 | } else { |
| 1403 | |
| 1404 | printk(KERN_ALERT PFX "Command not on active_cmd_queue!\n"); |
| 1405 | return; |
| 1406 | } |
| 1407 | |
| 1408 | sc_cmd->SCp.ptr = NULL; |
| 1409 | sc_cmd->scsi_done(sc_cmd); |
| 1410 | |
| 1411 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 1412 | if (io_req->wait_for_comp) { |
| 1413 | BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n"); |
| 1414 | complete(&io_req->tm_done); |
| 1415 | } |
| 1416 | } |
| 1417 | |
| 1418 | static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, |
| 1419 | int bd_index) |
| 1420 | { |
| 1421 | struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; |
| 1422 | int frag_size, sg_frags; |
| 1423 | |
| 1424 | sg_frags = 0; |
| 1425 | while (sg_len) { |
| 1426 | if (sg_len >= BNX2FC_BD_SPLIT_SZ) |
| 1427 | frag_size = BNX2FC_BD_SPLIT_SZ; |
| 1428 | else |
| 1429 | frag_size = sg_len; |
| 1430 | bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff; |
| 1431 | bd[bd_index + sg_frags].buf_addr_hi = addr >> 32; |
| 1432 | bd[bd_index + sg_frags].buf_len = (u16)frag_size; |
| 1433 | bd[bd_index + sg_frags].flags = 0; |
| 1434 | |
| 1435 | addr += (u64) frag_size; |
| 1436 | sg_frags++; |
| 1437 | sg_len -= frag_size; |
| 1438 | } |
| 1439 | return sg_frags; |
| 1440 | |
| 1441 | } |
| 1442 | |
| 1443 | static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req) |
| 1444 | { |
| 1445 | struct scsi_cmnd *sc = io_req->sc_cmd; |
| 1446 | struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; |
| 1447 | struct scatterlist *sg; |
| 1448 | int byte_count = 0; |
| 1449 | int sg_count = 0; |
| 1450 | int bd_count = 0; |
| 1451 | int sg_frags; |
| 1452 | unsigned int sg_len; |
| 1453 | u64 addr; |
| 1454 | int i; |
| 1455 | |
| 1456 | sg_count = scsi_dma_map(sc); |
| 1457 | scsi_for_each_sg(sc, sg, sg_count, i) { |
| 1458 | sg_len = sg_dma_len(sg); |
| 1459 | addr = sg_dma_address(sg); |
| 1460 | if (sg_len > BNX2FC_MAX_BD_LEN) { |
| 1461 | sg_frags = bnx2fc_split_bd(io_req, addr, sg_len, |
| 1462 | bd_count); |
| 1463 | } else { |
| 1464 | |
| 1465 | sg_frags = 1; |
| 1466 | bd[bd_count].buf_addr_lo = addr & 0xffffffff; |
| 1467 | bd[bd_count].buf_addr_hi = addr >> 32; |
| 1468 | bd[bd_count].buf_len = (u16)sg_len; |
| 1469 | bd[bd_count].flags = 0; |
| 1470 | } |
| 1471 | bd_count += sg_frags; |
| 1472 | byte_count += sg_len; |
| 1473 | } |
| 1474 | if (byte_count != scsi_bufflen(sc)) |
| 1475 | printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, " |
| 1476 | "task_id = 0x%x\n", byte_count, scsi_bufflen(sc), |
| 1477 | io_req->xid); |
| 1478 | return bd_count; |
| 1479 | } |
| 1480 | |
| 1481 | static void bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req) |
| 1482 | { |
| 1483 | struct scsi_cmnd *sc = io_req->sc_cmd; |
| 1484 | struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; |
| 1485 | int bd_count; |
| 1486 | |
| 1487 | if (scsi_sg_count(sc)) |
| 1488 | bd_count = bnx2fc_map_sg(io_req); |
| 1489 | else { |
| 1490 | bd_count = 0; |
| 1491 | bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0; |
| 1492 | bd[0].buf_len = bd[0].flags = 0; |
| 1493 | } |
| 1494 | io_req->bd_tbl->bd_valid = bd_count; |
| 1495 | } |
| 1496 | |
| 1497 | static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req) |
| 1498 | { |
| 1499 | struct scsi_cmnd *sc = io_req->sc_cmd; |
| 1500 | |
| 1501 | if (io_req->bd_tbl->bd_valid && sc) { |
| 1502 | scsi_dma_unmap(sc); |
| 1503 | io_req->bd_tbl->bd_valid = 0; |
| 1504 | } |
| 1505 | } |
| 1506 | |
| 1507 | void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req, |
| 1508 | struct fcp_cmnd *fcp_cmnd) |
| 1509 | { |
| 1510 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; |
| 1511 | char tag[2]; |
| 1512 | |
| 1513 | memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); |
| 1514 | |
| 1515 | int_to_scsilun(sc_cmd->device->lun, |
| 1516 | (struct scsi_lun *) fcp_cmnd->fc_lun); |
| 1517 | |
| 1518 | |
| 1519 | fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len); |
| 1520 | memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len); |
| 1521 | |
| 1522 | fcp_cmnd->fc_cmdref = 0; |
| 1523 | fcp_cmnd->fc_pri_ta = 0; |
| 1524 | fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags; |
| 1525 | fcp_cmnd->fc_flags = io_req->io_req_flags; |
| 1526 | |
| 1527 | if (scsi_populate_tag_msg(sc_cmd, tag)) { |
| 1528 | switch (tag[0]) { |
| 1529 | case HEAD_OF_QUEUE_TAG: |
| 1530 | fcp_cmnd->fc_pri_ta = FCP_PTA_HEADQ; |
| 1531 | break; |
| 1532 | case ORDERED_QUEUE_TAG: |
| 1533 | fcp_cmnd->fc_pri_ta = FCP_PTA_ORDERED; |
| 1534 | break; |
| 1535 | default: |
| 1536 | fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE; |
| 1537 | break; |
| 1538 | } |
| 1539 | } else { |
| 1540 | fcp_cmnd->fc_pri_ta = 0; |
| 1541 | } |
| 1542 | } |
| 1543 | |
| 1544 | static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, |
| 1545 | struct fcoe_fcp_rsp_payload *fcp_rsp, |
| 1546 | u8 num_rq) |
| 1547 | { |
| 1548 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; |
| 1549 | struct bnx2fc_rport *tgt = io_req->tgt; |
| 1550 | u8 rsp_flags = fcp_rsp->fcp_flags.flags; |
| 1551 | u32 rq_buff_len = 0; |
| 1552 | int i; |
| 1553 | unsigned char *rq_data; |
| 1554 | unsigned char *dummy; |
| 1555 | int fcp_sns_len = 0; |
| 1556 | int fcp_rsp_len = 0; |
| 1557 | |
| 1558 | io_req->fcp_status = FC_GOOD; |
| 1559 | io_req->fcp_resid = fcp_rsp->fcp_resid; |
| 1560 | |
| 1561 | io_req->scsi_comp_flags = rsp_flags; |
| 1562 | CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status = |
| 1563 | fcp_rsp->scsi_status_code; |
| 1564 | |
| 1565 | /* Fetch fcp_rsp_info and fcp_sns_info if available */ |
| 1566 | if (num_rq) { |
| 1567 | |
| 1568 | /* |
| 1569 | * We do not anticipate num_rq >1, as the linux defined |
| 1570 | * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO |
| 1571 | * 256 bytes of single rq buffer is good enough to hold this. |
| 1572 | */ |
| 1573 | |
| 1574 | if (rsp_flags & |
| 1575 | FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) { |
| 1576 | fcp_rsp_len = rq_buff_len |
| 1577 | = fcp_rsp->fcp_rsp_len; |
| 1578 | } |
| 1579 | |
| 1580 | if (rsp_flags & |
| 1581 | FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) { |
| 1582 | fcp_sns_len = fcp_rsp->fcp_sns_len; |
| 1583 | rq_buff_len += fcp_rsp->fcp_sns_len; |
| 1584 | } |
| 1585 | |
| 1586 | io_req->fcp_rsp_len = fcp_rsp_len; |
| 1587 | io_req->fcp_sns_len = fcp_sns_len; |
| 1588 | |
| 1589 | if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) { |
| 1590 | /* Invalid sense sense length. */ |
| 1591 | printk(KERN_ALERT PFX "invalid sns length %d\n", |
| 1592 | rq_buff_len); |
| 1593 | /* reset rq_buff_len */ |
| 1594 | rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ; |
| 1595 | } |
| 1596 | |
| 1597 | rq_data = bnx2fc_get_next_rqe(tgt, 1); |
| 1598 | |
| 1599 | if (num_rq > 1) { |
| 1600 | /* We do not need extra sense data */ |
| 1601 | for (i = 1; i < num_rq; i++) |
| 1602 | dummy = bnx2fc_get_next_rqe(tgt, 1); |
| 1603 | } |
| 1604 | |
| 1605 | /* fetch fcp_rsp_code */ |
| 1606 | if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) { |
| 1607 | /* Only for task management function */ |
| 1608 | io_req->fcp_rsp_code = rq_data[3]; |
| 1609 | printk(KERN_ERR PFX "fcp_rsp_code = %d\n", |
| 1610 | io_req->fcp_rsp_code); |
| 1611 | } |
| 1612 | |
| 1613 | /* fetch sense data */ |
| 1614 | rq_data += fcp_rsp_len; |
| 1615 | |
| 1616 | if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) { |
| 1617 | printk(KERN_ERR PFX "Truncating sense buffer\n"); |
| 1618 | fcp_sns_len = SCSI_SENSE_BUFFERSIZE; |
| 1619 | } |
| 1620 | |
| 1621 | memset(sc_cmd->sense_buffer, 0, sizeof(sc_cmd->sense_buffer)); |
| 1622 | if (fcp_sns_len) |
| 1623 | memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len); |
| 1624 | |
| 1625 | /* return RQ entries */ |
| 1626 | for (i = 0; i < num_rq; i++) |
| 1627 | bnx2fc_return_rqe(tgt, 1); |
| 1628 | } |
| 1629 | } |
| 1630 | |
| 1631 | /** |
| 1632 | * bnx2fc_queuecommand - Queuecommand function of the scsi template |
| 1633 | * |
| 1634 | * @host: The Scsi_Host the command was issued to |
| 1635 | * @sc_cmd: struct scsi_cmnd to be executed |
| 1636 | * |
| 1637 | * This is the IO strategy routine, called by SCSI-ML |
| 1638 | **/ |
| 1639 | int bnx2fc_queuecommand(struct Scsi_Host *host, |
| 1640 | struct scsi_cmnd *sc_cmd) |
| 1641 | { |
| 1642 | struct fc_lport *lport = shost_priv(host); |
| 1643 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); |
| 1644 | struct fc_rport_libfc_priv *rp = rport->dd_data; |
| 1645 | struct bnx2fc_rport *tgt; |
| 1646 | struct bnx2fc_cmd *io_req; |
| 1647 | int rc = 0; |
| 1648 | int rval; |
| 1649 | |
| 1650 | rval = fc_remote_port_chkready(rport); |
| 1651 | if (rval) { |
| 1652 | sc_cmd->result = rval; |
| 1653 | sc_cmd->scsi_done(sc_cmd); |
| 1654 | return 0; |
| 1655 | } |
| 1656 | |
| 1657 | if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { |
| 1658 | rc = SCSI_MLQUEUE_HOST_BUSY; |
| 1659 | goto exit_qcmd; |
| 1660 | } |
| 1661 | |
| 1662 | /* rport and tgt are allocated together, so tgt should be non-NULL */ |
| 1663 | tgt = (struct bnx2fc_rport *)&rp[1]; |
| 1664 | |
| 1665 | if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { |
Nithin Nayak Sujir | 35dd71a | 2011-04-25 12:30:08 -0700 | [diff] [blame] | 1666 | if (test_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags)) { |
| 1667 | sc_cmd->result = DID_NO_CONNECT << 16; |
| 1668 | sc_cmd->scsi_done(sc_cmd); |
| 1669 | return 0; |
| 1670 | |
| 1671 | } |
Bhanu Gollapudi | 853e2bd | 2011-02-04 12:10:34 -0800 | [diff] [blame] | 1672 | /* |
| 1673 | * Session is not offloaded yet. Let SCSI-ml retry |
| 1674 | * the command. |
| 1675 | */ |
| 1676 | rc = SCSI_MLQUEUE_TARGET_BUSY; |
| 1677 | goto exit_qcmd; |
| 1678 | } |
| 1679 | |
| 1680 | io_req = bnx2fc_cmd_alloc(tgt); |
| 1681 | if (!io_req) { |
| 1682 | rc = SCSI_MLQUEUE_HOST_BUSY; |
| 1683 | goto exit_qcmd; |
| 1684 | } |
| 1685 | io_req->sc_cmd = sc_cmd; |
| 1686 | |
| 1687 | if (bnx2fc_post_io_req(tgt, io_req)) { |
| 1688 | printk(KERN_ERR PFX "Unable to post io_req\n"); |
| 1689 | rc = SCSI_MLQUEUE_HOST_BUSY; |
| 1690 | goto exit_qcmd; |
| 1691 | } |
| 1692 | exit_qcmd: |
| 1693 | return rc; |
| 1694 | } |
| 1695 | |
| 1696 | void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req, |
| 1697 | struct fcoe_task_ctx_entry *task, |
| 1698 | u8 num_rq) |
| 1699 | { |
| 1700 | struct fcoe_fcp_rsp_payload *fcp_rsp; |
| 1701 | struct bnx2fc_rport *tgt = io_req->tgt; |
| 1702 | struct scsi_cmnd *sc_cmd; |
| 1703 | struct Scsi_Host *host; |
| 1704 | |
| 1705 | |
| 1706 | /* scsi_cmd_cmpl is called with tgt lock held */ |
| 1707 | |
| 1708 | if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) { |
| 1709 | /* we will not receive ABTS response for this IO */ |
| 1710 | BNX2FC_IO_DBG(io_req, "Timer context finished processing " |
| 1711 | "this scsi cmd\n"); |
| 1712 | } |
| 1713 | |
| 1714 | /* Cancel the timeout_work, as we received IO completion */ |
| 1715 | if (cancel_delayed_work(&io_req->timeout_work)) |
| 1716 | kref_put(&io_req->refcount, |
| 1717 | bnx2fc_cmd_release); /* drop timer hold */ |
| 1718 | |
| 1719 | sc_cmd = io_req->sc_cmd; |
| 1720 | if (sc_cmd == NULL) { |
| 1721 | printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n"); |
| 1722 | return; |
| 1723 | } |
| 1724 | |
| 1725 | /* Fetch fcp_rsp from task context and perform cmd completion */ |
| 1726 | fcp_rsp = (struct fcoe_fcp_rsp_payload *) |
| 1727 | &(task->cmn.general.rsp_info.fcp_rsp.payload); |
| 1728 | |
| 1729 | /* parse fcp_rsp and obtain sense data from RQ if available */ |
| 1730 | bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq); |
| 1731 | |
| 1732 | host = sc_cmd->device->host; |
| 1733 | if (!sc_cmd->SCp.ptr) { |
| 1734 | printk(KERN_ERR PFX "SCp.ptr is NULL\n"); |
| 1735 | return; |
| 1736 | } |
| 1737 | io_req->sc_cmd = NULL; |
| 1738 | |
| 1739 | if (io_req->on_active_queue) { |
| 1740 | list_del_init(&io_req->link); |
| 1741 | io_req->on_active_queue = 0; |
| 1742 | /* Move IO req to retire queue */ |
| 1743 | list_add_tail(&io_req->link, &tgt->io_retire_queue); |
| 1744 | } else { |
| 1745 | /* This should not happen, but could have been pulled |
| 1746 | * by bnx2fc_flush_active_ios(), or during a race |
| 1747 | * between command abort and (late) completion. |
| 1748 | */ |
| 1749 | BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n"); |
| 1750 | if (io_req->wait_for_comp) |
| 1751 | if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, |
| 1752 | &io_req->req_flags)) |
| 1753 | complete(&io_req->tm_done); |
| 1754 | } |
| 1755 | |
| 1756 | bnx2fc_unmap_sg_list(io_req); |
| 1757 | |
| 1758 | switch (io_req->fcp_status) { |
| 1759 | case FC_GOOD: |
| 1760 | if (io_req->cdb_status == 0) { |
| 1761 | /* Good IO completion */ |
| 1762 | sc_cmd->result = DID_OK << 16; |
| 1763 | } else { |
| 1764 | /* Transport status is good, SCSI status not good */ |
| 1765 | BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d" |
| 1766 | " fcp_resid = 0x%x\n", |
| 1767 | io_req->cdb_status, io_req->fcp_resid); |
| 1768 | sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; |
| 1769 | } |
| 1770 | if (io_req->fcp_resid) |
| 1771 | scsi_set_resid(sc_cmd, io_req->fcp_resid); |
| 1772 | break; |
| 1773 | default: |
| 1774 | printk(KERN_ALERT PFX "scsi_cmd_compl: fcp_status = %d\n", |
| 1775 | io_req->fcp_status); |
| 1776 | break; |
| 1777 | } |
| 1778 | sc_cmd->SCp.ptr = NULL; |
| 1779 | sc_cmd->scsi_done(sc_cmd); |
| 1780 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 1781 | } |
| 1782 | |
| 1783 | static int bnx2fc_post_io_req(struct bnx2fc_rport *tgt, |
| 1784 | struct bnx2fc_cmd *io_req) |
| 1785 | { |
| 1786 | struct fcoe_task_ctx_entry *task; |
| 1787 | struct fcoe_task_ctx_entry *task_page; |
| 1788 | struct scsi_cmnd *sc_cmd = io_req->sc_cmd; |
| 1789 | struct fcoe_port *port = tgt->port; |
| 1790 | struct bnx2fc_hba *hba = port->priv; |
| 1791 | struct fc_lport *lport = port->lport; |
| 1792 | struct fcoe_dev_stats *stats; |
| 1793 | int task_idx, index; |
| 1794 | u16 xid; |
| 1795 | |
| 1796 | /* Initialize rest of io_req fields */ |
| 1797 | io_req->cmd_type = BNX2FC_SCSI_CMD; |
| 1798 | io_req->port = port; |
| 1799 | io_req->tgt = tgt; |
| 1800 | io_req->data_xfer_len = scsi_bufflen(sc_cmd); |
| 1801 | sc_cmd->SCp.ptr = (char *)io_req; |
| 1802 | |
| 1803 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
| 1804 | if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) { |
| 1805 | io_req->io_req_flags = BNX2FC_READ; |
| 1806 | stats->InputRequests++; |
| 1807 | stats->InputBytes += io_req->data_xfer_len; |
| 1808 | } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { |
| 1809 | io_req->io_req_flags = BNX2FC_WRITE; |
| 1810 | stats->OutputRequests++; |
| 1811 | stats->OutputBytes += io_req->data_xfer_len; |
| 1812 | } else { |
| 1813 | io_req->io_req_flags = 0; |
| 1814 | stats->ControlRequests++; |
| 1815 | } |
| 1816 | put_cpu(); |
| 1817 | |
| 1818 | xid = io_req->xid; |
| 1819 | |
| 1820 | /* Build buffer descriptor list for firmware from sg list */ |
| 1821 | bnx2fc_build_bd_list_from_sg(io_req); |
| 1822 | |
| 1823 | task_idx = xid / BNX2FC_TASKS_PER_PAGE; |
| 1824 | index = xid % BNX2FC_TASKS_PER_PAGE; |
| 1825 | |
| 1826 | /* Initialize task context for this IO request */ |
| 1827 | task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx]; |
| 1828 | task = &(task_page[index]); |
| 1829 | bnx2fc_init_task(io_req, task); |
| 1830 | |
| 1831 | spin_lock_bh(&tgt->tgt_lock); |
| 1832 | |
| 1833 | if (tgt->flush_in_prog) { |
| 1834 | printk(KERN_ERR PFX "Flush in progress..Host Busy\n"); |
| 1835 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 1836 | spin_unlock_bh(&tgt->tgt_lock); |
| 1837 | return -EAGAIN; |
| 1838 | } |
| 1839 | |
| 1840 | if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { |
| 1841 | printk(KERN_ERR PFX "Session not ready...post_io\n"); |
| 1842 | kref_put(&io_req->refcount, bnx2fc_cmd_release); |
| 1843 | spin_unlock_bh(&tgt->tgt_lock); |
| 1844 | return -EAGAIN; |
| 1845 | } |
| 1846 | |
| 1847 | /* Time IO req */ |
| 1848 | bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT); |
| 1849 | /* Obtain free SQ entry */ |
| 1850 | bnx2fc_add_2_sq(tgt, xid); |
| 1851 | |
| 1852 | /* Enqueue the io_req to active_cmd_queue */ |
| 1853 | |
| 1854 | io_req->on_active_queue = 1; |
| 1855 | /* move io_req from pending_queue to active_queue */ |
| 1856 | list_add_tail(&io_req->link, &tgt->active_cmd_queue); |
| 1857 | |
| 1858 | /* Ring doorbell */ |
| 1859 | bnx2fc_ring_doorbell(tgt); |
| 1860 | spin_unlock_bh(&tgt->tgt_lock); |
| 1861 | return 0; |
| 1862 | } |