1 /* 2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 3 * 4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 5 * 6 * Copyright (C) IBM Corporation, 2008 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24 #include <linux/module.h> 25 #include <linux/moduleparam.h> 26 #include <linux/dma-mapping.h> 27 #include <linux/dmapool.h> 28 #include <linux/delay.h> 29 #include <linux/interrupt.h> 30 #include <linux/kthread.h> 31 #include <linux/slab.h> 32 #include <linux/of.h> 33 #include <linux/pm.h> 34 #include <linux/stringify.h> 35 #include <asm/firmware.h> 36 #include <asm/irq.h> 37 #include <asm/vio.h> 38 #include <scsi/scsi.h> 39 #include <scsi/scsi_cmnd.h> 40 #include <scsi/scsi_host.h> 41 #include <scsi/scsi_device.h> 42 #include <scsi/scsi_tcq.h> 43 #include <scsi/scsi_transport_fc.h> 44 #include <scsi/scsi_bsg_fc.h> 45 #include "ibmvfc.h" 46 47 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 48 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 49 static unsigned int max_lun = IBMVFC_MAX_LUN; 50 static unsigned int max_targets = IBMVFC_MAX_TARGETS; 51 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 52 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 53 static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 54 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 55 static LIST_HEAD(ibmvfc_head); 56 static DEFINE_SPINLOCK(ibmvfc_driver_lock); 57 static struct scsi_transport_template *ibmvfc_transport_template; 58 59 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 60 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 61 MODULE_LICENSE("GPL"); 62 MODULE_VERSION(IBMVFC_DRIVER_VERSION); 63 64 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 65 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 66 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 67 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 68 MODULE_PARM_DESC(default_timeout, 69 "Default timeout in seconds for initialization and EH commands. " 70 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 71 module_param_named(max_requests, max_requests, uint, S_IRUGO); 72 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 73 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 74 module_param_named(max_lun, max_lun, uint, S_IRUGO); 75 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 76 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 77 module_param_named(max_targets, max_targets, uint, S_IRUGO); 78 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 79 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 80 module_param_named(disc_threads, disc_threads, uint, S_IRUGO); 81 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 82 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 83 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 84 MODULE_PARM_DESC(debug, "Enable driver debug information. " 85 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 86 module_param_named(log_level, log_level, uint, 0); 87 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 88 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 89 90 static const struct { 91 u16 status; 92 u16 error; 93 u8 result; 94 u8 retry; 95 int log; 96 char *name; 97 } cmd_status [] = { 98 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 99 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 100 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 101 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 102 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 103 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 104 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 105 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 106 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 107 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 108 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 109 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 110 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 111 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 112 113 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 114 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 115 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 116 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 117 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 118 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 119 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 120 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 121 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 122 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 123 124 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 125 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 126 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 128 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 129 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 130 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 131 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 132 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 133 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 134 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 135 136 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 137 }; 138 139 static void ibmvfc_npiv_login(struct ibmvfc_host *); 140 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 141 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 142 static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 143 static void ibmvfc_npiv_logout(struct ibmvfc_host *); 144 145 static const char *unknown_error = "unknown error"; 146 147 #ifdef CONFIG_SCSI_IBMVFC_TRACE 148 /** 149 * ibmvfc_trc_start - Log a start trace entry 150 * @evt: ibmvfc event struct 151 * 152 **/ 153 static void ibmvfc_trc_start(struct ibmvfc_event *evt) 154 { 155 struct ibmvfc_host *vhost = evt->vhost; 156 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 157 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 158 struct ibmvfc_trace_entry *entry; 159 160 entry = &vhost->trace[vhost->trace_index++]; 161 entry->evt = evt; 162 entry->time = jiffies; 163 entry->fmt = evt->crq.format; 164 entry->type = IBMVFC_TRC_START; 165 166 switch (entry->fmt) { 167 case IBMVFC_CMD_FORMAT: 168 entry->op_code = vfc_cmd->iu.cdb[0]; 169 entry->scsi_id = vfc_cmd->tgt_scsi_id; 170 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 171 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 172 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; 173 break; 174 case IBMVFC_MAD_FORMAT: 175 entry->op_code = mad->opcode; 176 break; 177 default: 178 break; 179 }; 180 } 181 182 /** 183 * ibmvfc_trc_end - Log an end trace entry 184 * @evt: ibmvfc event struct 185 * 186 **/ 187 static void ibmvfc_trc_end(struct ibmvfc_event *evt) 188 { 189 struct ibmvfc_host *vhost = evt->vhost; 190 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 191 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 192 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; 193 194 entry->evt = evt; 195 entry->time = jiffies; 196 entry->fmt = evt->crq.format; 197 entry->type = IBMVFC_TRC_END; 198 199 switch (entry->fmt) { 200 case IBMVFC_CMD_FORMAT: 201 entry->op_code = vfc_cmd->iu.cdb[0]; 202 entry->scsi_id = vfc_cmd->tgt_scsi_id; 203 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 204 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 205 entry->u.end.status = vfc_cmd->status; 206 entry->u.end.error = vfc_cmd->error; 207 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; 208 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; 209 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; 210 break; 211 case IBMVFC_MAD_FORMAT: 212 entry->op_code = mad->opcode; 213 entry->u.end.status = mad->status; 214 break; 215 default: 216 break; 217 218 }; 219 } 220 221 #else 222 #define ibmvfc_trc_start(evt) do { } while (0) 223 #define ibmvfc_trc_end(evt) do { } while (0) 224 #endif 225 226 /** 227 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 228 * @status: status / error class 229 * @error: error 230 * 231 * Return value: 232 * index into cmd_status / -EINVAL on failure 233 **/ 234 static int ibmvfc_get_err_index(u16 status, u16 error) 235 { 236 int i; 237 238 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 239 if ((cmd_status[i].status & status) == cmd_status[i].status && 240 cmd_status[i].error == error) 241 return i; 242 243 return -EINVAL; 244 } 245 246 /** 247 * ibmvfc_get_cmd_error - Find the error description for the fcp response 248 * @status: status / error class 249 * @error: error 250 * 251 * Return value: 252 * error description string 253 **/ 254 static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 255 { 256 int rc = ibmvfc_get_err_index(status, error); 257 if (rc >= 0) 258 return cmd_status[rc].name; 259 return unknown_error; 260 } 261 262 /** 263 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 264 * @vfc_cmd: ibmvfc command struct 265 * 266 * Return value: 267 * SCSI result value to return for completed command 268 **/ 269 static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) 270 { 271 int err; 272 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 273 int fc_rsp_len = rsp->fcp_rsp_len; 274 275 if ((rsp->flags & FCP_RSP_LEN_VALID) && 276 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 277 rsp->data.info.rsp_code)) 278 return DID_ERROR << 16; 279 280 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 281 if (err >= 0) 282 return rsp->scsi_status | (cmd_status[err].result << 16); 283 return rsp->scsi_status | (DID_ERROR << 16); 284 } 285 286 /** 287 * ibmvfc_retry_cmd - Determine if error status is retryable 288 * @status: status / error class 289 * @error: error 290 * 291 * Return value: 292 * 1 if error should be retried / 0 if it should not 293 **/ 294 static int ibmvfc_retry_cmd(u16 status, u16 error) 295 { 296 int rc = ibmvfc_get_err_index(status, error); 297 298 if (rc >= 0) 299 return cmd_status[rc].retry; 300 return 1; 301 } 302 303 static const char *unknown_fc_explain = "unknown fc explain"; 304 305 static const struct { 306 u16 fc_explain; 307 char *name; 308 } ls_explain [] = { 309 { 0x00, "no additional explanation" }, 310 { 0x01, "service parameter error - options" }, 311 { 0x03, "service parameter error - initiator control" }, 312 { 0x05, "service parameter error - recipient control" }, 313 { 0x07, "service parameter error - received data field size" }, 314 { 0x09, "service parameter error - concurrent seq" }, 315 { 0x0B, "service parameter error - credit" }, 316 { 0x0D, "invalid N_Port/F_Port_Name" }, 317 { 0x0E, "invalid node/Fabric Name" }, 318 { 0x0F, "invalid common service parameters" }, 319 { 0x11, "invalid association header" }, 320 { 0x13, "association header required" }, 321 { 0x15, "invalid originator S_ID" }, 322 { 0x17, "invalid OX_ID-RX-ID combination" }, 323 { 0x19, "command (request) already in progress" }, 324 { 0x1E, "N_Port Login requested" }, 325 { 0x1F, "Invalid N_Port_ID" }, 326 }; 327 328 static const struct { 329 u16 fc_explain; 330 char *name; 331 } gs_explain [] = { 332 { 0x00, "no additional explanation" }, 333 { 0x01, "port identifier not registered" }, 334 { 0x02, "port name not registered" }, 335 { 0x03, "node name not registered" }, 336 { 0x04, "class of service not registered" }, 337 { 0x06, "initial process associator not registered" }, 338 { 0x07, "FC-4 TYPEs not registered" }, 339 { 0x08, "symbolic port name not registered" }, 340 { 0x09, "symbolic node name not registered" }, 341 { 0x0A, "port type not registered" }, 342 { 0xF0, "authorization exception" }, 343 { 0xF1, "authentication exception" }, 344 { 0xF2, "data base full" }, 345 { 0xF3, "data base empty" }, 346 { 0xF4, "processing request" }, 347 { 0xF5, "unable to verify connection" }, 348 { 0xF6, "devices not in a common zone" }, 349 }; 350 351 /** 352 * ibmvfc_get_ls_explain - Return the FC Explain description text 353 * @status: FC Explain status 354 * 355 * Returns: 356 * error string 357 **/ 358 static const char *ibmvfc_get_ls_explain(u16 status) 359 { 360 int i; 361 362 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 363 if (ls_explain[i].fc_explain == status) 364 return ls_explain[i].name; 365 366 return unknown_fc_explain; 367 } 368 369 /** 370 * ibmvfc_get_gs_explain - Return the FC Explain description text 371 * @status: FC Explain status 372 * 373 * Returns: 374 * error string 375 **/ 376 static const char *ibmvfc_get_gs_explain(u16 status) 377 { 378 int i; 379 380 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 381 if (gs_explain[i].fc_explain == status) 382 return gs_explain[i].name; 383 384 return unknown_fc_explain; 385 } 386 387 static const struct { 388 enum ibmvfc_fc_type fc_type; 389 char *name; 390 } fc_type [] = { 391 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 392 { IBMVFC_PORT_REJECT, "port reject" }, 393 { IBMVFC_LS_REJECT, "ELS reject" }, 394 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 395 { IBMVFC_PORT_BUSY, "port busy" }, 396 { IBMVFC_BASIC_REJECT, "basic reject" }, 397 }; 398 399 static const char *unknown_fc_type = "unknown fc type"; 400 401 /** 402 * ibmvfc_get_fc_type - Return the FC Type description text 403 * @status: FC Type error status 404 * 405 * Returns: 406 * error string 407 **/ 408 static const char *ibmvfc_get_fc_type(u16 status) 409 { 410 int i; 411 412 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 413 if (fc_type[i].fc_type == status) 414 return fc_type[i].name; 415 416 return unknown_fc_type; 417 } 418 419 /** 420 * ibmvfc_set_tgt_action - Set the next init action for the target 421 * @tgt: ibmvfc target struct 422 * @action: action to perform 423 * 424 **/ 425 static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 426 enum ibmvfc_target_action action) 427 { 428 switch (tgt->action) { 429 case IBMVFC_TGT_ACTION_DEL_RPORT: 430 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) 431 tgt->action = action; 432 case IBMVFC_TGT_ACTION_DELETED_RPORT: 433 break; 434 default: 435 if (action == IBMVFC_TGT_ACTION_DEL_RPORT) 436 tgt->add_rport = 0; 437 tgt->action = action; 438 break; 439 } 440 } 441 442 /** 443 * ibmvfc_set_host_state - Set the state for the host 444 * @vhost: ibmvfc host struct 445 * @state: state to set host to 446 * 447 * Returns: 448 * 0 if state changed / non-zero if not changed 449 **/ 450 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 451 enum ibmvfc_host_state state) 452 { 453 int rc = 0; 454 455 switch (vhost->state) { 456 case IBMVFC_HOST_OFFLINE: 457 rc = -EINVAL; 458 break; 459 default: 460 vhost->state = state; 461 break; 462 }; 463 464 return rc; 465 } 466 467 /** 468 * ibmvfc_set_host_action - Set the next init action for the host 469 * @vhost: ibmvfc host struct 470 * @action: action to perform 471 * 472 **/ 473 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 474 enum ibmvfc_host_action action) 475 { 476 switch (action) { 477 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 478 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 479 vhost->action = action; 480 break; 481 case IBMVFC_HOST_ACTION_LOGO_WAIT: 482 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 483 vhost->action = action; 484 break; 485 case IBMVFC_HOST_ACTION_INIT_WAIT: 486 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 487 vhost->action = action; 488 break; 489 case IBMVFC_HOST_ACTION_QUERY: 490 switch (vhost->action) { 491 case IBMVFC_HOST_ACTION_INIT_WAIT: 492 case IBMVFC_HOST_ACTION_NONE: 493 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 494 vhost->action = action; 495 break; 496 default: 497 break; 498 }; 499 break; 500 case IBMVFC_HOST_ACTION_TGT_INIT: 501 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 502 vhost->action = action; 503 break; 504 case IBMVFC_HOST_ACTION_INIT: 505 case IBMVFC_HOST_ACTION_TGT_DEL: 506 switch (vhost->action) { 507 case IBMVFC_HOST_ACTION_RESET: 508 case IBMVFC_HOST_ACTION_REENABLE: 509 break; 510 default: 511 vhost->action = action; 512 break; 513 }; 514 break; 515 case IBMVFC_HOST_ACTION_LOGO: 516 case IBMVFC_HOST_ACTION_QUERY_TGTS: 517 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 518 case IBMVFC_HOST_ACTION_NONE: 519 case IBMVFC_HOST_ACTION_RESET: 520 case IBMVFC_HOST_ACTION_REENABLE: 521 default: 522 vhost->action = action; 523 break; 524 }; 525 } 526 527 /** 528 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 529 * @vhost: ibmvfc host struct 530 * 531 * Return value: 532 * nothing 533 **/ 534 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 535 { 536 if (vhost->action == IBMVFC_HOST_ACTION_NONE) { 537 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 538 scsi_block_requests(vhost->host); 539 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 540 } 541 } else 542 vhost->reinit = 1; 543 544 wake_up(&vhost->work_wait_q); 545 } 546 547 /** 548 * ibmvfc_link_down - Handle a link down event from the adapter 549 * @vhost: ibmvfc host struct 550 * @state: ibmvfc host state to enter 551 * 552 **/ 553 static void ibmvfc_link_down(struct ibmvfc_host *vhost, 554 enum ibmvfc_host_state state) 555 { 556 struct ibmvfc_target *tgt; 557 558 ENTER; 559 scsi_block_requests(vhost->host); 560 list_for_each_entry(tgt, &vhost->targets, queue) 561 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 562 ibmvfc_set_host_state(vhost, state); 563 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 564 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 565 wake_up(&vhost->work_wait_q); 566 LEAVE; 567 } 568 569 /** 570 * ibmvfc_init_host - Start host initialization 571 * @vhost: ibmvfc host struct 572 * 573 * Return value: 574 * nothing 575 **/ 576 static void ibmvfc_init_host(struct ibmvfc_host *vhost) 577 { 578 struct ibmvfc_target *tgt; 579 580 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 581 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 582 dev_err(vhost->dev, 583 "Host initialization retries exceeded. Taking adapter offline\n"); 584 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 585 return; 586 } 587 } 588 589 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 590 memset(vhost->async_crq.msgs, 0, PAGE_SIZE); 591 vhost->async_crq.cur = 0; 592 593 list_for_each_entry(tgt, &vhost->targets, queue) 594 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 595 scsi_block_requests(vhost->host); 596 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 597 vhost->job_step = ibmvfc_npiv_login; 598 wake_up(&vhost->work_wait_q); 599 } 600 } 601 602 /** 603 * ibmvfc_send_crq - Send a CRQ 604 * @vhost: ibmvfc host struct 605 * @word1: the first 64 bits of the data 606 * @word2: the second 64 bits of the data 607 * 608 * Return value: 609 * 0 on success / other on failure 610 **/ 611 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 612 { 613 struct vio_dev *vdev = to_vio_dev(vhost->dev); 614 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 615 } 616 617 /** 618 * ibmvfc_send_crq_init - Send a CRQ init message 619 * @vhost: ibmvfc host struct 620 * 621 * Return value: 622 * 0 on success / other on failure 623 **/ 624 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 625 { 626 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 627 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 628 } 629 630 /** 631 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 632 * @vhost: ibmvfc host struct 633 * 634 * Return value: 635 * 0 on success / other on failure 636 **/ 637 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 638 { 639 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 640 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 641 } 642 643 /** 644 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 645 * @vhost: ibmvfc host struct 646 * 647 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 648 * the crq with the hypervisor. 649 **/ 650 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 651 { 652 long rc = 0; 653 struct vio_dev *vdev = to_vio_dev(vhost->dev); 654 struct ibmvfc_crq_queue *crq = &vhost->crq; 655 656 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 657 free_irq(vdev->irq, vhost); 658 tasklet_kill(&vhost->tasklet); 659 do { 660 if (rc) 661 msleep(100); 662 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 663 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 664 665 vhost->state = IBMVFC_NO_CRQ; 666 vhost->logged_in = 0; 667 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 668 free_page((unsigned long)crq->msgs); 669 } 670 671 /** 672 * ibmvfc_reenable_crq_queue - reenables the CRQ 673 * @vhost: ibmvfc host struct 674 * 675 * Return value: 676 * 0 on success / other on failure 677 **/ 678 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 679 { 680 int rc = 0; 681 struct vio_dev *vdev = to_vio_dev(vhost->dev); 682 683 /* Re-enable the CRQ */ 684 do { 685 if (rc) 686 msleep(100); 687 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 688 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 689 690 if (rc) 691 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 692 693 return rc; 694 } 695 696 /** 697 * ibmvfc_reset_crq - resets a crq after a failure 698 * @vhost: ibmvfc host struct 699 * 700 * Return value: 701 * 0 on success / other on failure 702 **/ 703 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 704 { 705 int rc = 0; 706 unsigned long flags; 707 struct vio_dev *vdev = to_vio_dev(vhost->dev); 708 struct ibmvfc_crq_queue *crq = &vhost->crq; 709 710 /* Close the CRQ */ 711 do { 712 if (rc) 713 msleep(100); 714 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 715 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 716 717 spin_lock_irqsave(vhost->host->host_lock, flags); 718 vhost->state = IBMVFC_NO_CRQ; 719 vhost->logged_in = 0; 720 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 721 722 /* Clean out the queue */ 723 memset(crq->msgs, 0, PAGE_SIZE); 724 crq->cur = 0; 725 726 /* And re-open it again */ 727 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 728 crq->msg_token, PAGE_SIZE); 729 730 if (rc == H_CLOSED) 731 /* Adapter is good, but other end is not ready */ 732 dev_warn(vhost->dev, "Partner adapter not ready\n"); 733 else if (rc != 0) 734 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 735 spin_unlock_irqrestore(vhost->host->host_lock, flags); 736 737 return rc; 738 } 739 740 /** 741 * ibmvfc_valid_event - Determines if event is valid. 742 * @pool: event_pool that contains the event 743 * @evt: ibmvfc event to be checked for validity 744 * 745 * Return value: 746 * 1 if event is valid / 0 if event is not valid 747 **/ 748 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 749 struct ibmvfc_event *evt) 750 { 751 int index = evt - pool->events; 752 if (index < 0 || index >= pool->size) /* outside of bounds */ 753 return 0; 754 if (evt != pool->events + index) /* unaligned */ 755 return 0; 756 return 1; 757 } 758 759 /** 760 * ibmvfc_free_event - Free the specified event 761 * @evt: ibmvfc_event to be freed 762 * 763 **/ 764 static void ibmvfc_free_event(struct ibmvfc_event *evt) 765 { 766 struct ibmvfc_host *vhost = evt->vhost; 767 struct ibmvfc_event_pool *pool = &vhost->pool; 768 769 BUG_ON(!ibmvfc_valid_event(pool, evt)); 770 BUG_ON(atomic_inc_return(&evt->free) != 1); 771 list_add_tail(&evt->queue, &vhost->free); 772 } 773 774 /** 775 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 776 * @evt: ibmvfc event struct 777 * 778 * This function does not setup any error status, that must be done 779 * before this function gets called. 780 **/ 781 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 782 { 783 struct scsi_cmnd *cmnd = evt->cmnd; 784 785 if (cmnd) { 786 scsi_dma_unmap(cmnd); 787 cmnd->scsi_done(cmnd); 788 } 789 790 if (evt->eh_comp) 791 complete(evt->eh_comp); 792 793 ibmvfc_free_event(evt); 794 } 795 796 /** 797 * ibmvfc_fail_request - Fail request with specified error code 798 * @evt: ibmvfc event struct 799 * @error_code: error code to fail request with 800 * 801 * Return value: 802 * none 803 **/ 804 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 805 { 806 if (evt->cmnd) { 807 evt->cmnd->result = (error_code << 16); 808 evt->done = ibmvfc_scsi_eh_done; 809 } else 810 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; 811 812 list_del(&evt->queue); 813 del_timer(&evt->timer); 814 ibmvfc_trc_end(evt); 815 evt->done(evt); 816 } 817 818 /** 819 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 820 * @vhost: ibmvfc host struct 821 * @error_code: error code to fail requests with 822 * 823 * Return value: 824 * none 825 **/ 826 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 827 { 828 struct ibmvfc_event *evt, *pos; 829 830 ibmvfc_dbg(vhost, "Purging all requests\n"); 831 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 832 ibmvfc_fail_request(evt, error_code); 833 } 834 835 /** 836 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 837 * @vhost: struct ibmvfc host to reset 838 **/ 839 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 840 { 841 ibmvfc_purge_requests(vhost, DID_ERROR); 842 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 843 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 844 } 845 846 /** 847 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 848 * @vhost: struct ibmvfc host to reset 849 **/ 850 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 851 { 852 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 853 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 854 scsi_block_requests(vhost->host); 855 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 856 vhost->job_step = ibmvfc_npiv_logout; 857 wake_up(&vhost->work_wait_q); 858 } else 859 ibmvfc_hard_reset_host(vhost); 860 } 861 862 /** 863 * ibmvfc_reset_host - Reset the connection to the server 864 * @vhost: ibmvfc host struct 865 **/ 866 static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 867 { 868 unsigned long flags; 869 870 spin_lock_irqsave(vhost->host->host_lock, flags); 871 __ibmvfc_reset_host(vhost); 872 spin_unlock_irqrestore(vhost->host->host_lock, flags); 873 } 874 875 /** 876 * ibmvfc_retry_host_init - Retry host initialization if allowed 877 * @vhost: ibmvfc host struct 878 * 879 * Returns: 1 if init will be retried / 0 if not 880 * 881 **/ 882 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 883 { 884 int retry = 0; 885 886 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 887 vhost->delay_init = 1; 888 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 889 dev_err(vhost->dev, 890 "Host initialization retries exceeded. Taking adapter offline\n"); 891 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 892 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 893 __ibmvfc_reset_host(vhost); 894 else { 895 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 896 retry = 1; 897 } 898 } 899 900 wake_up(&vhost->work_wait_q); 901 return retry; 902 } 903 904 /** 905 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 906 * @starget: scsi target struct 907 * 908 * Return value: 909 * ibmvfc_target struct / NULL if not found 910 **/ 911 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 912 { 913 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 914 struct ibmvfc_host *vhost = shost_priv(shost); 915 struct ibmvfc_target *tgt; 916 917 list_for_each_entry(tgt, &vhost->targets, queue) 918 if (tgt->target_id == starget->id) { 919 kref_get(&tgt->kref); 920 return tgt; 921 } 922 return NULL; 923 } 924 925 /** 926 * ibmvfc_get_target - Find the specified scsi_target 927 * @starget: scsi target struct 928 * 929 * Return value: 930 * ibmvfc_target struct / NULL if not found 931 **/ 932 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 933 { 934 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 935 struct ibmvfc_target *tgt; 936 unsigned long flags; 937 938 spin_lock_irqsave(shost->host_lock, flags); 939 tgt = __ibmvfc_get_target(starget); 940 spin_unlock_irqrestore(shost->host_lock, flags); 941 return tgt; 942 } 943 944 /** 945 * ibmvfc_get_host_speed - Get host port speed 946 * @shost: scsi host struct 947 * 948 * Return value: 949 * none 950 **/ 951 static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 952 { 953 struct ibmvfc_host *vhost = shost_priv(shost); 954 unsigned long flags; 955 956 spin_lock_irqsave(shost->host_lock, flags); 957 if (vhost->state == IBMVFC_ACTIVE) { 958 switch (vhost->login_buf->resp.link_speed / 100) { 959 case 1: 960 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 961 break; 962 case 2: 963 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 964 break; 965 case 4: 966 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 967 break; 968 case 8: 969 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 970 break; 971 case 10: 972 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 973 break; 974 case 16: 975 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 976 break; 977 default: 978 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 979 vhost->login_buf->resp.link_speed / 100); 980 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 981 break; 982 } 983 } else 984 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 985 spin_unlock_irqrestore(shost->host_lock, flags); 986 } 987 988 /** 989 * ibmvfc_get_host_port_state - Get host port state 990 * @shost: scsi host struct 991 * 992 * Return value: 993 * none 994 **/ 995 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 996 { 997 struct ibmvfc_host *vhost = shost_priv(shost); 998 unsigned long flags; 999 1000 spin_lock_irqsave(shost->host_lock, flags); 1001 switch (vhost->state) { 1002 case IBMVFC_INITIALIZING: 1003 case IBMVFC_ACTIVE: 1004 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 1005 break; 1006 case IBMVFC_LINK_DOWN: 1007 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 1008 break; 1009 case IBMVFC_LINK_DEAD: 1010 case IBMVFC_HOST_OFFLINE: 1011 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1012 break; 1013 case IBMVFC_HALTED: 1014 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1015 break; 1016 case IBMVFC_NO_CRQ: 1017 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1018 break; 1019 default: 1020 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1021 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1022 break; 1023 } 1024 spin_unlock_irqrestore(shost->host_lock, flags); 1025 } 1026 1027 /** 1028 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1029 * @rport: rport struct 1030 * @timeout: timeout value 1031 * 1032 * Return value: 1033 * none 1034 **/ 1035 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1036 { 1037 if (timeout) 1038 rport->dev_loss_tmo = timeout; 1039 else 1040 rport->dev_loss_tmo = 1; 1041 } 1042 1043 /** 1044 * ibmvfc_release_tgt - Free memory allocated for a target 1045 * @kref: kref struct 1046 * 1047 **/ 1048 static void ibmvfc_release_tgt(struct kref *kref) 1049 { 1050 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1051 kfree(tgt); 1052 } 1053 1054 /** 1055 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1056 * @starget: scsi target struct 1057 * 1058 * Return value: 1059 * none 1060 **/ 1061 static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1062 { 1063 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1064 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1065 if (tgt) 1066 kref_put(&tgt->kref, ibmvfc_release_tgt); 1067 } 1068 1069 /** 1070 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1071 * @starget: scsi target struct 1072 * 1073 * Return value: 1074 * none 1075 **/ 1076 static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1077 { 1078 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1079 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1080 if (tgt) 1081 kref_put(&tgt->kref, ibmvfc_release_tgt); 1082 } 1083 1084 /** 1085 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1086 * @starget: scsi target struct 1087 * 1088 * Return value: 1089 * none 1090 **/ 1091 static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1092 { 1093 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1094 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1095 if (tgt) 1096 kref_put(&tgt->kref, ibmvfc_release_tgt); 1097 } 1098 1099 /** 1100 * ibmvfc_wait_while_resetting - Wait while the host resets 1101 * @vhost: ibmvfc host struct 1102 * 1103 * Return value: 1104 * 0 on success / other on failure 1105 **/ 1106 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1107 { 1108 long timeout = wait_event_timeout(vhost->init_wait_q, 1109 ((vhost->state == IBMVFC_ACTIVE || 1110 vhost->state == IBMVFC_HOST_OFFLINE || 1111 vhost->state == IBMVFC_LINK_DEAD) && 1112 vhost->action == IBMVFC_HOST_ACTION_NONE), 1113 (init_timeout * HZ)); 1114 1115 return timeout ? 0 : -EIO; 1116 } 1117 1118 /** 1119 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1120 * @shost: scsi host struct 1121 * 1122 * Return value: 1123 * 0 on success / other on failure 1124 **/ 1125 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1126 { 1127 struct ibmvfc_host *vhost = shost_priv(shost); 1128 1129 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1130 ibmvfc_reset_host(vhost); 1131 return ibmvfc_wait_while_resetting(vhost); 1132 } 1133 1134 /** 1135 * ibmvfc_gather_partition_info - Gather info about the LPAR 1136 * 1137 * Return value: 1138 * none 1139 **/ 1140 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1141 { 1142 struct device_node *rootdn; 1143 const char *name; 1144 const unsigned int *num; 1145 1146 rootdn = of_find_node_by_path("/"); 1147 if (!rootdn) 1148 return; 1149 1150 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1151 if (name) 1152 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1153 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1154 if (num) 1155 vhost->partition_number = *num; 1156 of_node_put(rootdn); 1157 } 1158 1159 /** 1160 * ibmvfc_set_login_info - Setup info for NPIV login 1161 * @vhost: ibmvfc host struct 1162 * 1163 * Return value: 1164 * none 1165 **/ 1166 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1167 { 1168 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1169 struct device_node *of_node = vhost->dev->of_node; 1170 const char *location; 1171 1172 memset(login_info, 0, sizeof(*login_info)); 1173 1174 login_info->ostype = IBMVFC_OS_LINUX; 1175 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; 1176 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); 1177 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); 1178 login_info->partition_num = vhost->partition_number; 1179 login_info->vfc_frame_version = 1; 1180 login_info->fcp_version = 3; 1181 login_info->flags = IBMVFC_FLUSH_ON_HALT; 1182 if (vhost->client_migrated) 1183 login_info->flags |= IBMVFC_CLIENT_MIGRATED; 1184 1185 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1186 login_info->capabilities = IBMVFC_CAN_MIGRATE; 1187 login_info->async.va = vhost->async_crq.msg_token; 1188 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); 1189 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1190 strncpy(login_info->device_name, 1191 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1192 1193 location = of_get_property(of_node, "ibm,loc-code", NULL); 1194 location = location ? location : dev_name(vhost->dev); 1195 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1196 } 1197 1198 /** 1199 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1200 * @vhost: ibmvfc host who owns the event pool 1201 * 1202 * Returns zero on success. 1203 **/ 1204 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1205 { 1206 int i; 1207 struct ibmvfc_event_pool *pool = &vhost->pool; 1208 1209 ENTER; 1210 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1211 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1212 if (!pool->events) 1213 return -ENOMEM; 1214 1215 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1216 pool->size * sizeof(*pool->iu_storage), 1217 &pool->iu_token, 0); 1218 1219 if (!pool->iu_storage) { 1220 kfree(pool->events); 1221 return -ENOMEM; 1222 } 1223 1224 for (i = 0; i < pool->size; ++i) { 1225 struct ibmvfc_event *evt = &pool->events[i]; 1226 atomic_set(&evt->free, 1); 1227 evt->crq.valid = 0x80; 1228 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); 1229 evt->xfer_iu = pool->iu_storage + i; 1230 evt->vhost = vhost; 1231 evt->ext_list = NULL; 1232 list_add_tail(&evt->queue, &vhost->free); 1233 } 1234 1235 LEAVE; 1236 return 0; 1237 } 1238 1239 /** 1240 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1241 * @vhost: ibmvfc host who owns the event pool 1242 * 1243 **/ 1244 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1245 { 1246 int i; 1247 struct ibmvfc_event_pool *pool = &vhost->pool; 1248 1249 ENTER; 1250 for (i = 0; i < pool->size; ++i) { 1251 list_del(&pool->events[i].queue); 1252 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1253 if (pool->events[i].ext_list) 1254 dma_pool_free(vhost->sg_pool, 1255 pool->events[i].ext_list, 1256 pool->events[i].ext_list_token); 1257 } 1258 1259 kfree(pool->events); 1260 dma_free_coherent(vhost->dev, 1261 pool->size * sizeof(*pool->iu_storage), 1262 pool->iu_storage, pool->iu_token); 1263 LEAVE; 1264 } 1265 1266 /** 1267 * ibmvfc_get_event - Gets the next free event in pool 1268 * @vhost: ibmvfc host struct 1269 * 1270 * Returns a free event from the pool. 1271 **/ 1272 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1273 { 1274 struct ibmvfc_event *evt; 1275 1276 BUG_ON(list_empty(&vhost->free)); 1277 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1278 atomic_set(&evt->free, 0); 1279 list_del(&evt->queue); 1280 return evt; 1281 } 1282 1283 /** 1284 * ibmvfc_init_event - Initialize fields in an event struct that are always 1285 * required. 1286 * @evt: The event 1287 * @done: Routine to call when the event is responded to 1288 * @format: SRP or MAD format 1289 **/ 1290 static void ibmvfc_init_event(struct ibmvfc_event *evt, 1291 void (*done) (struct ibmvfc_event *), u8 format) 1292 { 1293 evt->cmnd = NULL; 1294 evt->sync_iu = NULL; 1295 evt->crq.format = format; 1296 evt->done = done; 1297 evt->eh_comp = NULL; 1298 } 1299 1300 /** 1301 * ibmvfc_map_sg_list - Initialize scatterlist 1302 * @scmd: scsi command struct 1303 * @nseg: number of scatterlist segments 1304 * @md: memory descriptor list to initialize 1305 **/ 1306 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1307 struct srp_direct_buf *md) 1308 { 1309 int i; 1310 struct scatterlist *sg; 1311 1312 scsi_for_each_sg(scmd, sg, nseg, i) { 1313 md[i].va = sg_dma_address(sg); 1314 md[i].len = sg_dma_len(sg); 1315 md[i].key = 0; 1316 } 1317 } 1318 1319 /** 1320 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1321 * @scmd: Scsi_Cmnd with the scatterlist 1322 * @evt: ibmvfc event struct 1323 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1324 * @dev: device for which to map dma memory 1325 * 1326 * Returns: 1327 * 0 on success / non-zero on failure 1328 **/ 1329 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1330 struct ibmvfc_event *evt, 1331 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1332 { 1333 1334 int sg_mapped; 1335 struct srp_direct_buf *data = &vfc_cmd->ioba; 1336 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1337 1338 sg_mapped = scsi_dma_map(scmd); 1339 if (!sg_mapped) { 1340 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; 1341 return 0; 1342 } else if (unlikely(sg_mapped < 0)) { 1343 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1344 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1345 return sg_mapped; 1346 } 1347 1348 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1349 vfc_cmd->flags |= IBMVFC_WRITE; 1350 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1351 } else { 1352 vfc_cmd->flags |= IBMVFC_READ; 1353 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1354 } 1355 1356 if (sg_mapped == 1) { 1357 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1358 return 0; 1359 } 1360 1361 vfc_cmd->flags |= IBMVFC_SCATTERLIST; 1362 1363 if (!evt->ext_list) { 1364 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1365 &evt->ext_list_token); 1366 1367 if (!evt->ext_list) { 1368 scsi_dma_unmap(scmd); 1369 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1370 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1371 return -ENOMEM; 1372 } 1373 } 1374 1375 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1376 1377 data->va = evt->ext_list_token; 1378 data->len = sg_mapped * sizeof(struct srp_direct_buf); 1379 data->key = 0; 1380 return 0; 1381 } 1382 1383 /** 1384 * ibmvfc_timeout - Internal command timeout handler 1385 * @evt: struct ibmvfc_event that timed out 1386 * 1387 * Called when an internally generated command times out 1388 **/ 1389 static void ibmvfc_timeout(struct ibmvfc_event *evt) 1390 { 1391 struct ibmvfc_host *vhost = evt->vhost; 1392 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1393 ibmvfc_reset_host(vhost); 1394 } 1395 1396 /** 1397 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1398 * @evt: event to be sent 1399 * @vhost: ibmvfc host struct 1400 * @timeout: timeout in seconds - 0 means do not time command 1401 * 1402 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1403 **/ 1404 static int ibmvfc_send_event(struct ibmvfc_event *evt, 1405 struct ibmvfc_host *vhost, unsigned long timeout) 1406 { 1407 u64 *crq_as_u64 = (u64 *) &evt->crq; 1408 int rc; 1409 1410 /* Copy the IU into the transfer area */ 1411 *evt->xfer_iu = evt->iu; 1412 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1413 evt->xfer_iu->cmd.tag = (u64)evt; 1414 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1415 evt->xfer_iu->mad_common.tag = (u64)evt; 1416 else 1417 BUG(); 1418 1419 list_add_tail(&evt->queue, &vhost->sent); 1420 init_timer(&evt->timer); 1421 1422 if (timeout) { 1423 evt->timer.data = (unsigned long) evt; 1424 evt->timer.expires = jiffies + (timeout * HZ); 1425 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; 1426 add_timer(&evt->timer); 1427 } 1428 1429 mb(); 1430 1431 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { 1432 list_del(&evt->queue); 1433 del_timer(&evt->timer); 1434 1435 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1436 * Firmware will send a CRQ with a transport event (0xFF) to 1437 * tell this client what has happened to the transport. This 1438 * will be handled in ibmvfc_handle_crq() 1439 */ 1440 if (rc == H_CLOSED) { 1441 if (printk_ratelimit()) 1442 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1443 if (evt->cmnd) 1444 scsi_dma_unmap(evt->cmnd); 1445 ibmvfc_free_event(evt); 1446 return SCSI_MLQUEUE_HOST_BUSY; 1447 } 1448 1449 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1450 if (evt->cmnd) { 1451 evt->cmnd->result = DID_ERROR << 16; 1452 evt->done = ibmvfc_scsi_eh_done; 1453 } else 1454 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; 1455 1456 evt->done(evt); 1457 } else 1458 ibmvfc_trc_start(evt); 1459 1460 return 0; 1461 } 1462 1463 /** 1464 * ibmvfc_log_error - Log an error for the failed command if appropriate 1465 * @evt: ibmvfc event to log 1466 * 1467 **/ 1468 static void ibmvfc_log_error(struct ibmvfc_event *evt) 1469 { 1470 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1471 struct ibmvfc_host *vhost = evt->vhost; 1472 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1473 struct scsi_cmnd *cmnd = evt->cmnd; 1474 const char *err = unknown_error; 1475 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 1476 int logerr = 0; 1477 int rsp_code = 0; 1478 1479 if (index >= 0) { 1480 logerr = cmd_status[index].log; 1481 err = cmd_status[index].name; 1482 } 1483 1484 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1485 return; 1486 1487 if (rsp->flags & FCP_RSP_LEN_VALID) 1488 rsp_code = rsp->data.info.rsp_code; 1489 1490 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1491 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1492 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1493 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1494 } 1495 1496 /** 1497 * ibmvfc_relogin - Log back into the specified device 1498 * @sdev: scsi device struct 1499 * 1500 **/ 1501 static void ibmvfc_relogin(struct scsi_device *sdev) 1502 { 1503 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1504 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1505 struct ibmvfc_target *tgt; 1506 1507 list_for_each_entry(tgt, &vhost->targets, queue) { 1508 if (rport == tgt->rport) { 1509 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 1510 break; 1511 } 1512 } 1513 1514 ibmvfc_reinit_host(vhost); 1515 } 1516 1517 /** 1518 * ibmvfc_scsi_done - Handle responses from commands 1519 * @evt: ibmvfc event to be handled 1520 * 1521 * Used as a callback when sending scsi cmds. 1522 **/ 1523 static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1524 { 1525 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1526 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1527 struct scsi_cmnd *cmnd = evt->cmnd; 1528 u32 rsp_len = 0; 1529 u32 sense_len = rsp->fcp_sense_len; 1530 1531 if (cmnd) { 1532 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) 1533 scsi_set_resid(cmnd, vfc_cmd->adapter_resid); 1534 else if (rsp->flags & FCP_RESID_UNDER) 1535 scsi_set_resid(cmnd, rsp->fcp_resid); 1536 else 1537 scsi_set_resid(cmnd, 0); 1538 1539 if (vfc_cmd->status) { 1540 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1541 1542 if (rsp->flags & FCP_RSP_LEN_VALID) 1543 rsp_len = rsp->fcp_rsp_len; 1544 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1545 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1546 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1547 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1548 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED)) 1549 ibmvfc_relogin(cmnd->device); 1550 1551 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1552 cmnd->result = (DID_ERROR << 16); 1553 1554 ibmvfc_log_error(evt); 1555 } 1556 1557 if (!cmnd->result && 1558 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1559 cmnd->result = (DID_ERROR << 16); 1560 1561 scsi_dma_unmap(cmnd); 1562 cmnd->scsi_done(cmnd); 1563 } 1564 1565 if (evt->eh_comp) 1566 complete(evt->eh_comp); 1567 1568 ibmvfc_free_event(evt); 1569 } 1570 1571 /** 1572 * ibmvfc_host_chkready - Check if the host can accept commands 1573 * @vhost: struct ibmvfc host 1574 * 1575 * Returns: 1576 * 1 if host can accept command / 0 if not 1577 **/ 1578 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1579 { 1580 int result = 0; 1581 1582 switch (vhost->state) { 1583 case IBMVFC_LINK_DEAD: 1584 case IBMVFC_HOST_OFFLINE: 1585 result = DID_NO_CONNECT << 16; 1586 break; 1587 case IBMVFC_NO_CRQ: 1588 case IBMVFC_INITIALIZING: 1589 case IBMVFC_HALTED: 1590 case IBMVFC_LINK_DOWN: 1591 result = DID_REQUEUE << 16; 1592 break; 1593 case IBMVFC_ACTIVE: 1594 result = 0; 1595 break; 1596 }; 1597 1598 return result; 1599 } 1600 1601 /** 1602 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1603 * @cmnd: struct scsi_cmnd to be executed 1604 * @done: Callback function to be called when cmnd is completed 1605 * 1606 * Returns: 1607 * 0 on success / other on failure 1608 **/ 1609 static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd, 1610 void (*done) (struct scsi_cmnd *)) 1611 { 1612 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1613 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1614 struct ibmvfc_cmd *vfc_cmd; 1615 struct ibmvfc_event *evt; 1616 u8 tag[2]; 1617 int rc; 1618 1619 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1620 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1621 cmnd->result = rc; 1622 done(cmnd); 1623 return 0; 1624 } 1625 1626 cmnd->result = (DID_OK << 16); 1627 evt = ibmvfc_get_event(vhost); 1628 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1629 evt->cmnd = cmnd; 1630 cmnd->scsi_done = done; 1631 vfc_cmd = &evt->iu.cmd; 1632 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1633 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1634 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); 1635 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; 1636 vfc_cmd->payload_len = sizeof(vfc_cmd->iu); 1637 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); 1638 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; 1639 vfc_cmd->tgt_scsi_id = rport->port_id; 1640 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); 1641 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1642 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1643 1644 if (scsi_populate_tag_msg(cmnd, tag)) { 1645 vfc_cmd->task_tag = tag[1]; 1646 switch (tag[0]) { 1647 case MSG_SIMPLE_TAG: 1648 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1649 break; 1650 case MSG_HEAD_TAG: 1651 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; 1652 break; 1653 case MSG_ORDERED_TAG: 1654 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; 1655 break; 1656 }; 1657 } 1658 1659 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1660 return ibmvfc_send_event(evt, vhost, 0); 1661 1662 ibmvfc_free_event(evt); 1663 if (rc == -ENOMEM) 1664 return SCSI_MLQUEUE_HOST_BUSY; 1665 1666 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1667 scmd_printk(KERN_ERR, cmnd, 1668 "Failed to map DMA buffer for command. rc=%d\n", rc); 1669 1670 cmnd->result = DID_ERROR << 16; 1671 done(cmnd); 1672 return 0; 1673 } 1674 1675 static DEF_SCSI_QCMD(ibmvfc_queuecommand) 1676 1677 /** 1678 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1679 * @evt: ibmvfc event struct 1680 * 1681 **/ 1682 static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1683 { 1684 /* copy the response back */ 1685 if (evt->sync_iu) 1686 *evt->sync_iu = *evt->xfer_iu; 1687 1688 complete(&evt->comp); 1689 } 1690 1691 /** 1692 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 1693 * @evt: struct ibmvfc_event 1694 * 1695 **/ 1696 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 1697 { 1698 struct ibmvfc_host *vhost = evt->vhost; 1699 1700 ibmvfc_free_event(evt); 1701 vhost->aborting_passthru = 0; 1702 dev_info(vhost->dev, "Passthru command cancelled\n"); 1703 } 1704 1705 /** 1706 * ibmvfc_bsg_timeout - Handle a BSG timeout 1707 * @job: struct fc_bsg_job that timed out 1708 * 1709 * Returns: 1710 * 0 on success / other on failure 1711 **/ 1712 static int ibmvfc_bsg_timeout(struct fc_bsg_job *job) 1713 { 1714 struct ibmvfc_host *vhost = shost_priv(job->shost); 1715 unsigned long port_id = (unsigned long)job->dd_data; 1716 struct ibmvfc_event *evt; 1717 struct ibmvfc_tmf *tmf; 1718 unsigned long flags; 1719 int rc; 1720 1721 ENTER; 1722 spin_lock_irqsave(vhost->host->host_lock, flags); 1723 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 1724 __ibmvfc_reset_host(vhost); 1725 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1726 return 0; 1727 } 1728 1729 vhost->aborting_passthru = 1; 1730 evt = ibmvfc_get_event(vhost); 1731 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 1732 1733 tmf = &evt->iu.tmf; 1734 memset(tmf, 0, sizeof(*tmf)); 1735 tmf->common.version = 1; 1736 tmf->common.opcode = IBMVFC_TMF_MAD; 1737 tmf->common.length = sizeof(*tmf); 1738 tmf->scsi_id = port_id; 1739 tmf->cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY; 1740 tmf->my_cancel_key = IBMVFC_INTERNAL_CANCEL_KEY; 1741 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1742 1743 if (rc != 0) { 1744 vhost->aborting_passthru = 0; 1745 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 1746 rc = -EIO; 1747 } else 1748 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 1749 port_id); 1750 1751 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1752 1753 LEAVE; 1754 return rc; 1755 } 1756 1757 /** 1758 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 1759 * @vhost: struct ibmvfc_host to send command 1760 * @port_id: port ID to send command 1761 * 1762 * Returns: 1763 * 0 on success / other on failure 1764 **/ 1765 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 1766 { 1767 struct ibmvfc_port_login *plogi; 1768 struct ibmvfc_target *tgt; 1769 struct ibmvfc_event *evt; 1770 union ibmvfc_iu rsp_iu; 1771 unsigned long flags; 1772 int rc = 0, issue_login = 1; 1773 1774 ENTER; 1775 spin_lock_irqsave(vhost->host->host_lock, flags); 1776 list_for_each_entry(tgt, &vhost->targets, queue) { 1777 if (tgt->scsi_id == port_id) { 1778 issue_login = 0; 1779 break; 1780 } 1781 } 1782 1783 if (!issue_login) 1784 goto unlock_out; 1785 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 1786 goto unlock_out; 1787 1788 evt = ibmvfc_get_event(vhost); 1789 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1790 plogi = &evt->iu.plogi; 1791 memset(plogi, 0, sizeof(*plogi)); 1792 plogi->common.version = 1; 1793 plogi->common.opcode = IBMVFC_PORT_LOGIN; 1794 plogi->common.length = sizeof(*plogi); 1795 plogi->scsi_id = port_id; 1796 evt->sync_iu = &rsp_iu; 1797 init_completion(&evt->comp); 1798 1799 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1800 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1801 1802 if (rc) 1803 return -EIO; 1804 1805 wait_for_completion(&evt->comp); 1806 1807 if (rsp_iu.plogi.common.status) 1808 rc = -EIO; 1809 1810 spin_lock_irqsave(vhost->host->host_lock, flags); 1811 ibmvfc_free_event(evt); 1812 unlock_out: 1813 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1814 LEAVE; 1815 return rc; 1816 } 1817 1818 /** 1819 * ibmvfc_bsg_request - Handle a BSG request 1820 * @job: struct fc_bsg_job to be executed 1821 * 1822 * Returns: 1823 * 0 on success / other on failure 1824 **/ 1825 static int ibmvfc_bsg_request(struct fc_bsg_job *job) 1826 { 1827 struct ibmvfc_host *vhost = shost_priv(job->shost); 1828 struct fc_rport *rport = job->rport; 1829 struct ibmvfc_passthru_mad *mad; 1830 struct ibmvfc_event *evt; 1831 union ibmvfc_iu rsp_iu; 1832 unsigned long flags, port_id = -1; 1833 unsigned int code = job->request->msgcode; 1834 int rc = 0, req_seg, rsp_seg, issue_login = 0; 1835 u32 fc_flags, rsp_len; 1836 1837 ENTER; 1838 job->reply->reply_payload_rcv_len = 0; 1839 if (rport) 1840 port_id = rport->port_id; 1841 1842 switch (code) { 1843 case FC_BSG_HST_ELS_NOLOGIN: 1844 port_id = (job->request->rqst_data.h_els.port_id[0] << 16) | 1845 (job->request->rqst_data.h_els.port_id[1] << 8) | 1846 job->request->rqst_data.h_els.port_id[2]; 1847 case FC_BSG_RPT_ELS: 1848 fc_flags = IBMVFC_FC_ELS; 1849 break; 1850 case FC_BSG_HST_CT: 1851 issue_login = 1; 1852 port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) | 1853 (job->request->rqst_data.h_ct.port_id[1] << 8) | 1854 job->request->rqst_data.h_ct.port_id[2]; 1855 case FC_BSG_RPT_CT: 1856 fc_flags = IBMVFC_FC_CT_IU; 1857 break; 1858 default: 1859 return -ENOTSUPP; 1860 }; 1861 1862 if (port_id == -1) 1863 return -EINVAL; 1864 if (!mutex_trylock(&vhost->passthru_mutex)) 1865 return -EBUSY; 1866 1867 job->dd_data = (void *)port_id; 1868 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 1869 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1870 1871 if (!req_seg) { 1872 mutex_unlock(&vhost->passthru_mutex); 1873 return -ENOMEM; 1874 } 1875 1876 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 1877 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1878 1879 if (!rsp_seg) { 1880 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1881 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1882 mutex_unlock(&vhost->passthru_mutex); 1883 return -ENOMEM; 1884 } 1885 1886 if (req_seg > 1 || rsp_seg > 1) { 1887 rc = -EINVAL; 1888 goto out; 1889 } 1890 1891 if (issue_login) 1892 rc = ibmvfc_bsg_plogi(vhost, port_id); 1893 1894 spin_lock_irqsave(vhost->host->host_lock, flags); 1895 1896 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 1897 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1898 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1899 goto out; 1900 } 1901 1902 evt = ibmvfc_get_event(vhost); 1903 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1904 mad = &evt->iu.passthru; 1905 1906 memset(mad, 0, sizeof(*mad)); 1907 mad->common.version = 1; 1908 mad->common.opcode = IBMVFC_PASSTHRU; 1909 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 1910 1911 mad->cmd_ioba.va = (u64)evt->crq.ioba + 1912 offsetof(struct ibmvfc_passthru_mad, iu); 1913 mad->cmd_ioba.len = sizeof(mad->iu); 1914 1915 mad->iu.cmd_len = job->request_payload.payload_len; 1916 mad->iu.rsp_len = job->reply_payload.payload_len; 1917 mad->iu.flags = fc_flags; 1918 mad->iu.cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY; 1919 1920 mad->iu.cmd.va = sg_dma_address(job->request_payload.sg_list); 1921 mad->iu.cmd.len = sg_dma_len(job->request_payload.sg_list); 1922 mad->iu.rsp.va = sg_dma_address(job->reply_payload.sg_list); 1923 mad->iu.rsp.len = sg_dma_len(job->reply_payload.sg_list); 1924 mad->iu.scsi_id = port_id; 1925 mad->iu.tag = (u64)evt; 1926 rsp_len = mad->iu.rsp.len; 1927 1928 evt->sync_iu = &rsp_iu; 1929 init_completion(&evt->comp); 1930 rc = ibmvfc_send_event(evt, vhost, 0); 1931 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1932 1933 if (rc) { 1934 rc = -EIO; 1935 goto out; 1936 } 1937 1938 wait_for_completion(&evt->comp); 1939 1940 if (rsp_iu.passthru.common.status) 1941 rc = -EIO; 1942 else 1943 job->reply->reply_payload_rcv_len = rsp_len; 1944 1945 spin_lock_irqsave(vhost->host->host_lock, flags); 1946 ibmvfc_free_event(evt); 1947 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1948 job->reply->result = rc; 1949 job->job_done(job); 1950 rc = 0; 1951 out: 1952 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1953 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1954 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 1955 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1956 mutex_unlock(&vhost->passthru_mutex); 1957 LEAVE; 1958 return rc; 1959 } 1960 1961 /** 1962 * ibmvfc_reset_device - Reset the device with the specified reset type 1963 * @sdev: scsi device to reset 1964 * @type: reset type 1965 * @desc: reset type description for log messages 1966 * 1967 * Returns: 1968 * 0 on success / other on failure 1969 **/ 1970 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1971 { 1972 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1973 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1974 struct ibmvfc_cmd *tmf; 1975 struct ibmvfc_event *evt = NULL; 1976 union ibmvfc_iu rsp_iu; 1977 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1978 int rsp_rc = -EBUSY; 1979 unsigned long flags; 1980 int rsp_code = 0; 1981 1982 spin_lock_irqsave(vhost->host->host_lock, flags); 1983 if (vhost->state == IBMVFC_ACTIVE) { 1984 evt = ibmvfc_get_event(vhost); 1985 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1986 1987 tmf = &evt->iu.cmd; 1988 memset(tmf, 0, sizeof(*tmf)); 1989 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1990 tmf->resp.len = sizeof(tmf->rsp); 1991 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1992 tmf->payload_len = sizeof(tmf->iu); 1993 tmf->resp_len = sizeof(tmf->rsp); 1994 tmf->cancel_key = (unsigned long)sdev->hostdata; 1995 tmf->tgt_scsi_id = rport->port_id; 1996 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1997 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1998 tmf->iu.tmf_flags = type; 1999 evt->sync_iu = &rsp_iu; 2000 2001 init_completion(&evt->comp); 2002 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2003 } 2004 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2005 2006 if (rsp_rc != 0) { 2007 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 2008 desc, rsp_rc); 2009 return -EIO; 2010 } 2011 2012 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2013 wait_for_completion(&evt->comp); 2014 2015 if (rsp_iu.cmd.status) 2016 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2017 2018 if (rsp_code) { 2019 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2020 rsp_code = fc_rsp->data.info.rsp_code; 2021 2022 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2023 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2024 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 2025 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2026 fc_rsp->scsi_status); 2027 rsp_rc = -EIO; 2028 } else 2029 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2030 2031 spin_lock_irqsave(vhost->host->host_lock, flags); 2032 ibmvfc_free_event(evt); 2033 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2034 return rsp_rc; 2035 } 2036 2037 /** 2038 * ibmvfc_match_rport - Match function for specified remote port 2039 * @evt: ibmvfc event struct 2040 * @device: device to match (rport) 2041 * 2042 * Returns: 2043 * 1 if event matches rport / 0 if event does not match rport 2044 **/ 2045 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2046 { 2047 struct fc_rport *cmd_rport; 2048 2049 if (evt->cmnd) { 2050 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2051 if (cmd_rport == rport) 2052 return 1; 2053 } 2054 return 0; 2055 } 2056 2057 /** 2058 * ibmvfc_match_target - Match function for specified target 2059 * @evt: ibmvfc event struct 2060 * @device: device to match (starget) 2061 * 2062 * Returns: 2063 * 1 if event matches starget / 0 if event does not match starget 2064 **/ 2065 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2066 { 2067 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2068 return 1; 2069 return 0; 2070 } 2071 2072 /** 2073 * ibmvfc_match_lun - Match function for specified LUN 2074 * @evt: ibmvfc event struct 2075 * @device: device to match (sdev) 2076 * 2077 * Returns: 2078 * 1 if event matches sdev / 0 if event does not match sdev 2079 **/ 2080 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2081 { 2082 if (evt->cmnd && evt->cmnd->device == device) 2083 return 1; 2084 return 0; 2085 } 2086 2087 /** 2088 * ibmvfc_wait_for_ops - Wait for ops to complete 2089 * @vhost: ibmvfc host struct 2090 * @device: device to match (starget or sdev) 2091 * @match: match function 2092 * 2093 * Returns: 2094 * SUCCESS / FAILED 2095 **/ 2096 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2097 int (*match) (struct ibmvfc_event *, void *)) 2098 { 2099 struct ibmvfc_event *evt; 2100 DECLARE_COMPLETION_ONSTACK(comp); 2101 int wait; 2102 unsigned long flags; 2103 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2104 2105 ENTER; 2106 do { 2107 wait = 0; 2108 spin_lock_irqsave(vhost->host->host_lock, flags); 2109 list_for_each_entry(evt, &vhost->sent, queue) { 2110 if (match(evt, device)) { 2111 evt->eh_comp = ∁ 2112 wait++; 2113 } 2114 } 2115 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2116 2117 if (wait) { 2118 timeout = wait_for_completion_timeout(&comp, timeout); 2119 2120 if (!timeout) { 2121 wait = 0; 2122 spin_lock_irqsave(vhost->host->host_lock, flags); 2123 list_for_each_entry(evt, &vhost->sent, queue) { 2124 if (match(evt, device)) { 2125 evt->eh_comp = NULL; 2126 wait++; 2127 } 2128 } 2129 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2130 if (wait) 2131 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2132 LEAVE; 2133 return wait ? FAILED : SUCCESS; 2134 } 2135 } 2136 } while (wait); 2137 2138 LEAVE; 2139 return SUCCESS; 2140 } 2141 2142 /** 2143 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2144 * @sdev: scsi device to cancel commands 2145 * @type: type of error recovery being performed 2146 * 2147 * This sends a cancel to the VIOS for the specified device. This does 2148 * NOT send any abort to the actual device. That must be done separately. 2149 * 2150 * Returns: 2151 * 0 on success / other on failure 2152 **/ 2153 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2154 { 2155 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2156 struct scsi_target *starget = scsi_target(sdev); 2157 struct fc_rport *rport = starget_to_rport(starget); 2158 struct ibmvfc_tmf *tmf; 2159 struct ibmvfc_event *evt, *found_evt; 2160 union ibmvfc_iu rsp; 2161 int rsp_rc = -EBUSY; 2162 unsigned long flags; 2163 u16 status; 2164 2165 ENTER; 2166 spin_lock_irqsave(vhost->host->host_lock, flags); 2167 found_evt = NULL; 2168 list_for_each_entry(evt, &vhost->sent, queue) { 2169 if (evt->cmnd && evt->cmnd->device == sdev) { 2170 found_evt = evt; 2171 break; 2172 } 2173 } 2174 2175 if (!found_evt) { 2176 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2177 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2178 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2179 return 0; 2180 } 2181 2182 if (vhost->logged_in) { 2183 evt = ibmvfc_get_event(vhost); 2184 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2185 2186 tmf = &evt->iu.tmf; 2187 memset(tmf, 0, sizeof(*tmf)); 2188 tmf->common.version = 1; 2189 tmf->common.opcode = IBMVFC_TMF_MAD; 2190 tmf->common.length = sizeof(*tmf); 2191 tmf->scsi_id = rport->port_id; 2192 int_to_scsilun(sdev->lun, &tmf->lun); 2193 if (!(vhost->login_buf->resp.capabilities & IBMVFC_CAN_SUPPRESS_ABTS)) 2194 type &= ~IBMVFC_TMF_SUPPRESS_ABTS; 2195 if (vhost->state == IBMVFC_ACTIVE) 2196 tmf->flags = (type | IBMVFC_TMF_LUA_VALID); 2197 else 2198 tmf->flags = ((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID); 2199 tmf->cancel_key = (unsigned long)sdev->hostdata; 2200 tmf->my_cancel_key = (unsigned long)starget->hostdata; 2201 2202 evt->sync_iu = &rsp; 2203 init_completion(&evt->comp); 2204 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2205 } 2206 2207 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2208 2209 if (rsp_rc != 0) { 2210 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2211 /* If failure is received, the host adapter is most likely going 2212 through reset, return success so the caller will wait for the command 2213 being cancelled to get returned */ 2214 return 0; 2215 } 2216 2217 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2218 2219 wait_for_completion(&evt->comp); 2220 status = rsp.mad_common.status; 2221 spin_lock_irqsave(vhost->host->host_lock, flags); 2222 ibmvfc_free_event(evt); 2223 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2224 2225 if (status != IBMVFC_MAD_SUCCESS) { 2226 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2227 switch (status) { 2228 case IBMVFC_MAD_DRIVER_FAILED: 2229 case IBMVFC_MAD_CRQ_ERROR: 2230 /* Host adapter most likely going through reset, return success to 2231 the caller will wait for the command being cancelled to get returned */ 2232 return 0; 2233 default: 2234 return -EIO; 2235 }; 2236 } 2237 2238 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2239 return 0; 2240 } 2241 2242 /** 2243 * ibmvfc_match_key - Match function for specified cancel key 2244 * @evt: ibmvfc event struct 2245 * @key: cancel key to match 2246 * 2247 * Returns: 2248 * 1 if event matches key / 0 if event does not match key 2249 **/ 2250 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2251 { 2252 unsigned long cancel_key = (unsigned long)key; 2253 2254 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2255 evt->iu.cmd.cancel_key == cancel_key) 2256 return 1; 2257 return 0; 2258 } 2259 2260 /** 2261 * ibmvfc_match_evt - Match function for specified event 2262 * @evt: ibmvfc event struct 2263 * @match: event to match 2264 * 2265 * Returns: 2266 * 1 if event matches key / 0 if event does not match key 2267 **/ 2268 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) 2269 { 2270 if (evt == match) 2271 return 1; 2272 return 0; 2273 } 2274 2275 /** 2276 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2277 * @sdev: scsi device to abort commands 2278 * 2279 * This sends an Abort Task Set to the VIOS for the specified device. This does 2280 * NOT send any cancel to the VIOS. That must be done separately. 2281 * 2282 * Returns: 2283 * 0 on success / other on failure 2284 **/ 2285 static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2286 { 2287 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2288 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2289 struct ibmvfc_cmd *tmf; 2290 struct ibmvfc_event *evt, *found_evt; 2291 union ibmvfc_iu rsp_iu; 2292 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 2293 int rc, rsp_rc = -EBUSY; 2294 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2295 int rsp_code = 0; 2296 2297 spin_lock_irqsave(vhost->host->host_lock, flags); 2298 found_evt = NULL; 2299 list_for_each_entry(evt, &vhost->sent, queue) { 2300 if (evt->cmnd && evt->cmnd->device == sdev) { 2301 found_evt = evt; 2302 break; 2303 } 2304 } 2305 2306 if (!found_evt) { 2307 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2308 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2309 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2310 return 0; 2311 } 2312 2313 if (vhost->state == IBMVFC_ACTIVE) { 2314 evt = ibmvfc_get_event(vhost); 2315 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2316 2317 tmf = &evt->iu.cmd; 2318 memset(tmf, 0, sizeof(*tmf)); 2319 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 2320 tmf->resp.len = sizeof(tmf->rsp); 2321 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 2322 tmf->payload_len = sizeof(tmf->iu); 2323 tmf->resp_len = sizeof(tmf->rsp); 2324 tmf->cancel_key = (unsigned long)sdev->hostdata; 2325 tmf->tgt_scsi_id = rport->port_id; 2326 int_to_scsilun(sdev->lun, &tmf->iu.lun); 2327 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 2328 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 2329 evt->sync_iu = &rsp_iu; 2330 2331 init_completion(&evt->comp); 2332 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2333 } 2334 2335 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2336 2337 if (rsp_rc != 0) { 2338 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2339 return -EIO; 2340 } 2341 2342 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2343 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2344 2345 if (!timeout) { 2346 rc = ibmvfc_cancel_all(sdev, 0); 2347 if (!rc) { 2348 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2349 if (rc == SUCCESS) 2350 rc = 0; 2351 } 2352 2353 if (rc) { 2354 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2355 ibmvfc_reset_host(vhost); 2356 rsp_rc = -EIO; 2357 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2358 2359 if (rc == SUCCESS) 2360 rsp_rc = 0; 2361 2362 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); 2363 if (rc != SUCCESS) { 2364 spin_lock_irqsave(vhost->host->host_lock, flags); 2365 ibmvfc_hard_reset_host(vhost); 2366 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2367 rsp_rc = 0; 2368 } 2369 2370 goto out; 2371 } 2372 } 2373 2374 if (rsp_iu.cmd.status) 2375 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2376 2377 if (rsp_code) { 2378 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2379 rsp_code = fc_rsp->data.info.rsp_code; 2380 2381 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2382 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2383 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 2384 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2385 fc_rsp->scsi_status); 2386 rsp_rc = -EIO; 2387 } else 2388 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2389 2390 out: 2391 spin_lock_irqsave(vhost->host->host_lock, flags); 2392 ibmvfc_free_event(evt); 2393 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2394 return rsp_rc; 2395 } 2396 2397 /** 2398 * ibmvfc_eh_abort_handler - Abort a command 2399 * @cmd: scsi command to abort 2400 * 2401 * Returns: 2402 * SUCCESS / FAST_IO_FAIL / FAILED 2403 **/ 2404 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2405 { 2406 struct scsi_device *sdev = cmd->device; 2407 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2408 int cancel_rc, block_rc; 2409 int rc = FAILED; 2410 2411 ENTER; 2412 block_rc = fc_block_scsi_eh(cmd); 2413 ibmvfc_wait_while_resetting(vhost); 2414 if (block_rc != FAST_IO_FAIL) { 2415 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2416 ibmvfc_abort_task_set(sdev); 2417 } else 2418 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2419 2420 if (!cancel_rc) 2421 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2422 2423 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2424 rc = FAST_IO_FAIL; 2425 2426 LEAVE; 2427 return rc; 2428 } 2429 2430 /** 2431 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2432 * @cmd: scsi command struct 2433 * 2434 * Returns: 2435 * SUCCESS / FAST_IO_FAIL / FAILED 2436 **/ 2437 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2438 { 2439 struct scsi_device *sdev = cmd->device; 2440 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2441 int cancel_rc, block_rc, reset_rc = 0; 2442 int rc = FAILED; 2443 2444 ENTER; 2445 block_rc = fc_block_scsi_eh(cmd); 2446 ibmvfc_wait_while_resetting(vhost); 2447 if (block_rc != FAST_IO_FAIL) { 2448 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2449 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2450 } else 2451 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2452 2453 if (!cancel_rc && !reset_rc) 2454 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2455 2456 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2457 rc = FAST_IO_FAIL; 2458 2459 LEAVE; 2460 return rc; 2461 } 2462 2463 /** 2464 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function 2465 * @sdev: scsi device struct 2466 * @data: return code 2467 * 2468 **/ 2469 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) 2470 { 2471 unsigned long *rc = data; 2472 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2473 } 2474 2475 /** 2476 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2477 * @sdev: scsi device struct 2478 * @data: return code 2479 * 2480 **/ 2481 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2482 { 2483 unsigned long *rc = data; 2484 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2485 } 2486 2487 /** 2488 * ibmvfc_eh_target_reset_handler - Reset the target 2489 * @cmd: scsi command struct 2490 * 2491 * Returns: 2492 * SUCCESS / FAST_IO_FAIL / FAILED 2493 **/ 2494 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2495 { 2496 struct scsi_device *sdev = cmd->device; 2497 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2498 struct scsi_target *starget = scsi_target(sdev); 2499 int block_rc; 2500 int reset_rc = 0; 2501 int rc = FAILED; 2502 unsigned long cancel_rc = 0; 2503 2504 ENTER; 2505 block_rc = fc_block_scsi_eh(cmd); 2506 ibmvfc_wait_while_resetting(vhost); 2507 if (block_rc != FAST_IO_FAIL) { 2508 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2509 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2510 } else 2511 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); 2512 2513 if (!cancel_rc && !reset_rc) 2514 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2515 2516 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2517 rc = FAST_IO_FAIL; 2518 2519 LEAVE; 2520 return rc; 2521 } 2522 2523 /** 2524 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2525 * @cmd: struct scsi_cmnd having problems 2526 * 2527 **/ 2528 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2529 { 2530 int rc, block_rc; 2531 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2532 2533 block_rc = fc_block_scsi_eh(cmd); 2534 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2535 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2536 2537 if (block_rc == FAST_IO_FAIL) 2538 return FAST_IO_FAIL; 2539 2540 return rc ? FAILED : SUCCESS; 2541 } 2542 2543 /** 2544 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2545 * @rport: rport struct 2546 * 2547 * Return value: 2548 * none 2549 **/ 2550 static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2551 { 2552 struct Scsi_Host *shost = rport_to_shost(rport); 2553 struct ibmvfc_host *vhost = shost_priv(shost); 2554 struct fc_rport *dev_rport; 2555 struct scsi_device *sdev; 2556 unsigned long rc; 2557 2558 ENTER; 2559 shost_for_each_device(sdev, shost) { 2560 dev_rport = starget_to_rport(scsi_target(sdev)); 2561 if (dev_rport != rport) 2562 continue; 2563 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2564 } 2565 2566 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 2567 2568 if (rc == FAILED) 2569 ibmvfc_issue_fc_host_lip(shost); 2570 LEAVE; 2571 } 2572 2573 static const struct ibmvfc_async_desc ae_desc [] = { 2574 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2575 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2576 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2577 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2578 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2579 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, 2580 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, 2581 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, 2582 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, 2583 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, 2584 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, 2585 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, 2586 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, 2587 }; 2588 2589 static const struct ibmvfc_async_desc unknown_ae = { 2590 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL 2591 }; 2592 2593 /** 2594 * ibmvfc_get_ae_desc - Get text description for async event 2595 * @ae: async event 2596 * 2597 **/ 2598 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 2599 { 2600 int i; 2601 2602 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2603 if (ae_desc[i].ae == ae) 2604 return &ae_desc[i]; 2605 2606 return &unknown_ae; 2607 } 2608 2609 static const struct { 2610 enum ibmvfc_ae_link_state state; 2611 const char *desc; 2612 } link_desc [] = { 2613 { IBMVFC_AE_LS_LINK_UP, " link up" }, 2614 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 2615 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 2616 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 2617 }; 2618 2619 /** 2620 * ibmvfc_get_link_state - Get text description for link state 2621 * @state: link state 2622 * 2623 **/ 2624 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 2625 { 2626 int i; 2627 2628 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 2629 if (link_desc[i].state == state) 2630 return link_desc[i].desc; 2631 2632 return ""; 2633 } 2634 2635 /** 2636 * ibmvfc_handle_async - Handle an async event from the adapter 2637 * @crq: crq to process 2638 * @vhost: ibmvfc host struct 2639 * 2640 **/ 2641 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2642 struct ibmvfc_host *vhost) 2643 { 2644 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(crq->event); 2645 struct ibmvfc_target *tgt; 2646 2647 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 2648 " node_name: %llx%s\n", desc->desc, crq->scsi_id, crq->wwpn, crq->node_name, 2649 ibmvfc_get_link_state(crq->link_state)); 2650 2651 switch (crq->event) { 2652 case IBMVFC_AE_RESUME: 2653 switch (crq->link_state) { 2654 case IBMVFC_AE_LS_LINK_DOWN: 2655 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2656 break; 2657 case IBMVFC_AE_LS_LINK_DEAD: 2658 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2659 break; 2660 case IBMVFC_AE_LS_LINK_UP: 2661 case IBMVFC_AE_LS_LINK_BOUNCED: 2662 default: 2663 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2664 vhost->delay_init = 1; 2665 __ibmvfc_reset_host(vhost); 2666 break; 2667 }; 2668 2669 break; 2670 case IBMVFC_AE_LINK_UP: 2671 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2672 vhost->delay_init = 1; 2673 __ibmvfc_reset_host(vhost); 2674 break; 2675 case IBMVFC_AE_SCN_FABRIC: 2676 case IBMVFC_AE_SCN_DOMAIN: 2677 vhost->events_to_log |= IBMVFC_AE_RSCN; 2678 if (vhost->state < IBMVFC_HALTED) { 2679 vhost->delay_init = 1; 2680 __ibmvfc_reset_host(vhost); 2681 } 2682 break; 2683 case IBMVFC_AE_SCN_NPORT: 2684 case IBMVFC_AE_SCN_GROUP: 2685 vhost->events_to_log |= IBMVFC_AE_RSCN; 2686 ibmvfc_reinit_host(vhost); 2687 break; 2688 case IBMVFC_AE_ELS_LOGO: 2689 case IBMVFC_AE_ELS_PRLO: 2690 case IBMVFC_AE_ELS_PLOGI: 2691 list_for_each_entry(tgt, &vhost->targets, queue) { 2692 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 2693 break; 2694 if (crq->scsi_id && tgt->scsi_id != crq->scsi_id) 2695 continue; 2696 if (crq->wwpn && tgt->ids.port_name != crq->wwpn) 2697 continue; 2698 if (crq->node_name && tgt->ids.node_name != crq->node_name) 2699 continue; 2700 if (tgt->need_login && crq->event == IBMVFC_AE_ELS_LOGO) 2701 tgt->logo_rcvd = 1; 2702 if (!tgt->need_login || crq->event == IBMVFC_AE_ELS_PLOGI) { 2703 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2704 ibmvfc_reinit_host(vhost); 2705 } 2706 } 2707 break; 2708 case IBMVFC_AE_LINK_DOWN: 2709 case IBMVFC_AE_ADAPTER_FAILED: 2710 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2711 break; 2712 case IBMVFC_AE_LINK_DEAD: 2713 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2714 break; 2715 case IBMVFC_AE_HALT: 2716 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2717 break; 2718 default: 2719 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2720 break; 2721 }; 2722 } 2723 2724 /** 2725 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2726 * @crq: Command/Response queue 2727 * @vhost: ibmvfc host struct 2728 * 2729 **/ 2730 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2731 { 2732 long rc; 2733 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; 2734 2735 switch (crq->valid) { 2736 case IBMVFC_CRQ_INIT_RSP: 2737 switch (crq->format) { 2738 case IBMVFC_CRQ_INIT: 2739 dev_info(vhost->dev, "Partner initialized\n"); 2740 /* Send back a response */ 2741 rc = ibmvfc_send_crq_init_complete(vhost); 2742 if (rc == 0) 2743 ibmvfc_init_host(vhost); 2744 else 2745 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2746 break; 2747 case IBMVFC_CRQ_INIT_COMPLETE: 2748 dev_info(vhost->dev, "Partner initialization complete\n"); 2749 ibmvfc_init_host(vhost); 2750 break; 2751 default: 2752 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2753 } 2754 return; 2755 case IBMVFC_CRQ_XPORT_EVENT: 2756 vhost->state = IBMVFC_NO_CRQ; 2757 vhost->logged_in = 0; 2758 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2759 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2760 /* We need to re-setup the interpartition connection */ 2761 dev_info(vhost->dev, "Re-enabling adapter\n"); 2762 vhost->client_migrated = 1; 2763 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2764 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2765 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 2766 } else { 2767 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2768 ibmvfc_purge_requests(vhost, DID_ERROR); 2769 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2770 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 2771 } 2772 return; 2773 case IBMVFC_CRQ_CMD_RSP: 2774 break; 2775 default: 2776 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2777 return; 2778 } 2779 2780 if (crq->format == IBMVFC_ASYNC_EVENT) 2781 return; 2782 2783 /* The only kind of payload CRQs we should get are responses to 2784 * things we send. Make sure this response is to something we 2785 * actually sent 2786 */ 2787 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2788 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2789 crq->ioba); 2790 return; 2791 } 2792 2793 if (unlikely(atomic_read(&evt->free))) { 2794 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2795 crq->ioba); 2796 return; 2797 } 2798 2799 del_timer(&evt->timer); 2800 list_del(&evt->queue); 2801 ibmvfc_trc_end(evt); 2802 evt->done(evt); 2803 } 2804 2805 /** 2806 * ibmvfc_scan_finished - Check if the device scan is done. 2807 * @shost: scsi host struct 2808 * @time: current elapsed time 2809 * 2810 * Returns: 2811 * 0 if scan is not done / 1 if scan is done 2812 **/ 2813 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2814 { 2815 unsigned long flags; 2816 struct ibmvfc_host *vhost = shost_priv(shost); 2817 int done = 0; 2818 2819 spin_lock_irqsave(shost->host_lock, flags); 2820 if (time >= (init_timeout * HZ)) { 2821 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2822 "continuing initialization\n", init_timeout); 2823 done = 1; 2824 } 2825 2826 if (vhost->scan_complete) 2827 done = 1; 2828 spin_unlock_irqrestore(shost->host_lock, flags); 2829 return done; 2830 } 2831 2832 /** 2833 * ibmvfc_slave_alloc - Setup the device's task set value 2834 * @sdev: struct scsi_device device to configure 2835 * 2836 * Set the device's task set value so that error handling works as 2837 * expected. 2838 * 2839 * Returns: 2840 * 0 on success / -ENXIO if device does not exist 2841 **/ 2842 static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2843 { 2844 struct Scsi_Host *shost = sdev->host; 2845 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2846 struct ibmvfc_host *vhost = shost_priv(shost); 2847 unsigned long flags = 0; 2848 2849 if (!rport || fc_remote_port_chkready(rport)) 2850 return -ENXIO; 2851 2852 spin_lock_irqsave(shost->host_lock, flags); 2853 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2854 spin_unlock_irqrestore(shost->host_lock, flags); 2855 return 0; 2856 } 2857 2858 /** 2859 * ibmvfc_target_alloc - Setup the target's task set value 2860 * @starget: struct scsi_target 2861 * 2862 * Set the target's task set value so that error handling works as 2863 * expected. 2864 * 2865 * Returns: 2866 * 0 on success / -ENXIO if device does not exist 2867 **/ 2868 static int ibmvfc_target_alloc(struct scsi_target *starget) 2869 { 2870 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2871 struct ibmvfc_host *vhost = shost_priv(shost); 2872 unsigned long flags = 0; 2873 2874 spin_lock_irqsave(shost->host_lock, flags); 2875 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2876 spin_unlock_irqrestore(shost->host_lock, flags); 2877 return 0; 2878 } 2879 2880 /** 2881 * ibmvfc_slave_configure - Configure the device 2882 * @sdev: struct scsi_device device to configure 2883 * 2884 * Enable allow_restart for a device if it is a disk. Adjust the 2885 * queue_depth here also. 2886 * 2887 * Returns: 2888 * 0 2889 **/ 2890 static int ibmvfc_slave_configure(struct scsi_device *sdev) 2891 { 2892 struct Scsi_Host *shost = sdev->host; 2893 unsigned long flags = 0; 2894 2895 spin_lock_irqsave(shost->host_lock, flags); 2896 if (sdev->type == TYPE_DISK) 2897 sdev->allow_restart = 1; 2898 2899 if (sdev->tagged_supported) { 2900 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 2901 scsi_activate_tcq(sdev, sdev->queue_depth); 2902 } else 2903 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2904 spin_unlock_irqrestore(shost->host_lock, flags); 2905 return 0; 2906 } 2907 2908 /** 2909 * ibmvfc_change_queue_depth - Change the device's queue depth 2910 * @sdev: scsi device struct 2911 * @qdepth: depth to set 2912 * @reason: calling context 2913 * 2914 * Return value: 2915 * actual depth set 2916 **/ 2917 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth, 2918 int reason) 2919 { 2920 if (reason != SCSI_QDEPTH_DEFAULT) 2921 return -EOPNOTSUPP; 2922 2923 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2924 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2925 2926 scsi_adjust_queue_depth(sdev, 0, qdepth); 2927 return sdev->queue_depth; 2928 } 2929 2930 /** 2931 * ibmvfc_change_queue_type - Change the device's queue type 2932 * @sdev: scsi device struct 2933 * @tag_type: type of tags to use 2934 * 2935 * Return value: 2936 * actual queue type set 2937 **/ 2938 static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) 2939 { 2940 if (sdev->tagged_supported) { 2941 scsi_set_tag_type(sdev, tag_type); 2942 2943 if (tag_type) 2944 scsi_activate_tcq(sdev, sdev->queue_depth); 2945 else 2946 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2947 } else 2948 tag_type = 0; 2949 2950 return tag_type; 2951 } 2952 2953 static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2954 struct device_attribute *attr, char *buf) 2955 { 2956 struct Scsi_Host *shost = class_to_shost(dev); 2957 struct ibmvfc_host *vhost = shost_priv(shost); 2958 2959 return snprintf(buf, PAGE_SIZE, "%s\n", 2960 vhost->login_buf->resp.partition_name); 2961 } 2962 2963 static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2964 struct device_attribute *attr, char *buf) 2965 { 2966 struct Scsi_Host *shost = class_to_shost(dev); 2967 struct ibmvfc_host *vhost = shost_priv(shost); 2968 2969 return snprintf(buf, PAGE_SIZE, "%s\n", 2970 vhost->login_buf->resp.device_name); 2971 } 2972 2973 static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2974 struct device_attribute *attr, char *buf) 2975 { 2976 struct Scsi_Host *shost = class_to_shost(dev); 2977 struct ibmvfc_host *vhost = shost_priv(shost); 2978 2979 return snprintf(buf, PAGE_SIZE, "%s\n", 2980 vhost->login_buf->resp.port_loc_code); 2981 } 2982 2983 static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2984 struct device_attribute *attr, char *buf) 2985 { 2986 struct Scsi_Host *shost = class_to_shost(dev); 2987 struct ibmvfc_host *vhost = shost_priv(shost); 2988 2989 return snprintf(buf, PAGE_SIZE, "%s\n", 2990 vhost->login_buf->resp.drc_name); 2991 } 2992 2993 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2994 struct device_attribute *attr, char *buf) 2995 { 2996 struct Scsi_Host *shost = class_to_shost(dev); 2997 struct ibmvfc_host *vhost = shost_priv(shost); 2998 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2999 } 3000 3001 static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 3002 struct device_attribute *attr, char *buf) 3003 { 3004 struct Scsi_Host *shost = class_to_shost(dev); 3005 struct ibmvfc_host *vhost = shost_priv(shost); 3006 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); 3007 } 3008 3009 /** 3010 * ibmvfc_show_log_level - Show the adapter's error logging level 3011 * @dev: class device struct 3012 * @buf: buffer 3013 * 3014 * Return value: 3015 * number of bytes printed to buffer 3016 **/ 3017 static ssize_t ibmvfc_show_log_level(struct device *dev, 3018 struct device_attribute *attr, char *buf) 3019 { 3020 struct Scsi_Host *shost = class_to_shost(dev); 3021 struct ibmvfc_host *vhost = shost_priv(shost); 3022 unsigned long flags = 0; 3023 int len; 3024 3025 spin_lock_irqsave(shost->host_lock, flags); 3026 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 3027 spin_unlock_irqrestore(shost->host_lock, flags); 3028 return len; 3029 } 3030 3031 /** 3032 * ibmvfc_store_log_level - Change the adapter's error logging level 3033 * @dev: class device struct 3034 * @buf: buffer 3035 * 3036 * Return value: 3037 * number of bytes printed to buffer 3038 **/ 3039 static ssize_t ibmvfc_store_log_level(struct device *dev, 3040 struct device_attribute *attr, 3041 const char *buf, size_t count) 3042 { 3043 struct Scsi_Host *shost = class_to_shost(dev); 3044 struct ibmvfc_host *vhost = shost_priv(shost); 3045 unsigned long flags = 0; 3046 3047 spin_lock_irqsave(shost->host_lock, flags); 3048 vhost->log_level = simple_strtoul(buf, NULL, 10); 3049 spin_unlock_irqrestore(shost->host_lock, flags); 3050 return strlen(buf); 3051 } 3052 3053 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 3054 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 3055 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 3056 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 3057 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 3058 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 3059 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 3060 ibmvfc_show_log_level, ibmvfc_store_log_level); 3061 3062 #ifdef CONFIG_SCSI_IBMVFC_TRACE 3063 /** 3064 * ibmvfc_read_trace - Dump the adapter trace 3065 * @filp: open sysfs file 3066 * @kobj: kobject struct 3067 * @bin_attr: bin_attribute struct 3068 * @buf: buffer 3069 * @off: offset 3070 * @count: buffer size 3071 * 3072 * Return value: 3073 * number of bytes printed to buffer 3074 **/ 3075 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 3076 struct bin_attribute *bin_attr, 3077 char *buf, loff_t off, size_t count) 3078 { 3079 struct device *dev = container_of(kobj, struct device, kobj); 3080 struct Scsi_Host *shost = class_to_shost(dev); 3081 struct ibmvfc_host *vhost = shost_priv(shost); 3082 unsigned long flags = 0; 3083 int size = IBMVFC_TRACE_SIZE; 3084 char *src = (char *)vhost->trace; 3085 3086 if (off > size) 3087 return 0; 3088 if (off + count > size) { 3089 size -= off; 3090 count = size; 3091 } 3092 3093 spin_lock_irqsave(shost->host_lock, flags); 3094 memcpy(buf, &src[off], count); 3095 spin_unlock_irqrestore(shost->host_lock, flags); 3096 return count; 3097 } 3098 3099 static struct bin_attribute ibmvfc_trace_attr = { 3100 .attr = { 3101 .name = "trace", 3102 .mode = S_IRUGO, 3103 }, 3104 .size = 0, 3105 .read = ibmvfc_read_trace, 3106 }; 3107 #endif 3108 3109 static struct device_attribute *ibmvfc_attrs[] = { 3110 &dev_attr_partition_name, 3111 &dev_attr_device_name, 3112 &dev_attr_port_loc_code, 3113 &dev_attr_drc_name, 3114 &dev_attr_npiv_version, 3115 &dev_attr_capabilities, 3116 &dev_attr_log_level, 3117 NULL 3118 }; 3119 3120 static struct scsi_host_template driver_template = { 3121 .module = THIS_MODULE, 3122 .name = "IBM POWER Virtual FC Adapter", 3123 .proc_name = IBMVFC_NAME, 3124 .queuecommand = ibmvfc_queuecommand, 3125 .eh_abort_handler = ibmvfc_eh_abort_handler, 3126 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3127 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3128 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3129 .slave_alloc = ibmvfc_slave_alloc, 3130 .slave_configure = ibmvfc_slave_configure, 3131 .target_alloc = ibmvfc_target_alloc, 3132 .scan_finished = ibmvfc_scan_finished, 3133 .change_queue_depth = ibmvfc_change_queue_depth, 3134 .change_queue_type = ibmvfc_change_queue_type, 3135 .cmd_per_lun = 16, 3136 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3137 .this_id = -1, 3138 .sg_tablesize = SG_ALL, 3139 .max_sectors = IBMVFC_MAX_SECTORS, 3140 .use_clustering = ENABLE_CLUSTERING, 3141 .shost_attrs = ibmvfc_attrs, 3142 }; 3143 3144 /** 3145 * ibmvfc_next_async_crq - Returns the next entry in async queue 3146 * @vhost: ibmvfc host struct 3147 * 3148 * Returns: 3149 * Pointer to next entry in queue / NULL if empty 3150 **/ 3151 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3152 { 3153 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 3154 struct ibmvfc_async_crq *crq; 3155 3156 crq = &async_crq->msgs[async_crq->cur]; 3157 if (crq->valid & 0x80) { 3158 if (++async_crq->cur == async_crq->size) 3159 async_crq->cur = 0; 3160 rmb(); 3161 } else 3162 crq = NULL; 3163 3164 return crq; 3165 } 3166 3167 /** 3168 * ibmvfc_next_crq - Returns the next entry in message queue 3169 * @vhost: ibmvfc host struct 3170 * 3171 * Returns: 3172 * Pointer to next entry in queue / NULL if empty 3173 **/ 3174 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3175 { 3176 struct ibmvfc_crq_queue *queue = &vhost->crq; 3177 struct ibmvfc_crq *crq; 3178 3179 crq = &queue->msgs[queue->cur]; 3180 if (crq->valid & 0x80) { 3181 if (++queue->cur == queue->size) 3182 queue->cur = 0; 3183 rmb(); 3184 } else 3185 crq = NULL; 3186 3187 return crq; 3188 } 3189 3190 /** 3191 * ibmvfc_interrupt - Interrupt handler 3192 * @irq: number of irq to handle, not used 3193 * @dev_instance: ibmvfc_host that received interrupt 3194 * 3195 * Returns: 3196 * IRQ_HANDLED 3197 **/ 3198 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3199 { 3200 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3201 unsigned long flags; 3202 3203 spin_lock_irqsave(vhost->host->host_lock, flags); 3204 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3205 tasklet_schedule(&vhost->tasklet); 3206 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3207 return IRQ_HANDLED; 3208 } 3209 3210 /** 3211 * ibmvfc_tasklet - Interrupt handler tasklet 3212 * @data: ibmvfc host struct 3213 * 3214 * Returns: 3215 * Nothing 3216 **/ 3217 static void ibmvfc_tasklet(void *data) 3218 { 3219 struct ibmvfc_host *vhost = data; 3220 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3221 struct ibmvfc_crq *crq; 3222 struct ibmvfc_async_crq *async; 3223 unsigned long flags; 3224 int done = 0; 3225 3226 spin_lock_irqsave(vhost->host->host_lock, flags); 3227 while (!done) { 3228 /* Pull all the valid messages off the async CRQ */ 3229 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3230 ibmvfc_handle_async(async, vhost); 3231 async->valid = 0; 3232 wmb(); 3233 } 3234 3235 /* Pull all the valid messages off the CRQ */ 3236 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3237 ibmvfc_handle_crq(crq, vhost); 3238 crq->valid = 0; 3239 wmb(); 3240 } 3241 3242 vio_enable_interrupts(vdev); 3243 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3244 vio_disable_interrupts(vdev); 3245 ibmvfc_handle_async(async, vhost); 3246 async->valid = 0; 3247 wmb(); 3248 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3249 vio_disable_interrupts(vdev); 3250 ibmvfc_handle_crq(crq, vhost); 3251 crq->valid = 0; 3252 wmb(); 3253 } else 3254 done = 1; 3255 } 3256 3257 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3258 } 3259 3260 /** 3261 * ibmvfc_init_tgt - Set the next init job step for the target 3262 * @tgt: ibmvfc target struct 3263 * @job_step: job step to perform 3264 * 3265 **/ 3266 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3267 void (*job_step) (struct ibmvfc_target *)) 3268 { 3269 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 3270 tgt->job_step = job_step; 3271 wake_up(&tgt->vhost->work_wait_q); 3272 } 3273 3274 /** 3275 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3276 * @tgt: ibmvfc target struct 3277 * @job_step: initialization job step 3278 * 3279 * Returns: 1 if step will be retried / 0 if not 3280 * 3281 **/ 3282 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3283 void (*job_step) (struct ibmvfc_target *)) 3284 { 3285 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3286 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3287 wake_up(&tgt->vhost->work_wait_q); 3288 return 0; 3289 } else 3290 ibmvfc_init_tgt(tgt, job_step); 3291 return 1; 3292 } 3293 3294 /* Defined in FC-LS */ 3295 static const struct { 3296 int code; 3297 int retry; 3298 int logged_in; 3299 } prli_rsp [] = { 3300 { 0, 1, 0 }, 3301 { 1, 0, 1 }, 3302 { 2, 1, 0 }, 3303 { 3, 1, 0 }, 3304 { 4, 0, 0 }, 3305 { 5, 0, 0 }, 3306 { 6, 0, 1 }, 3307 { 7, 0, 0 }, 3308 { 8, 1, 0 }, 3309 }; 3310 3311 /** 3312 * ibmvfc_get_prli_rsp - Find PRLI response index 3313 * @flags: PRLI response flags 3314 * 3315 **/ 3316 static int ibmvfc_get_prli_rsp(u16 flags) 3317 { 3318 int i; 3319 int code = (flags & 0x0f00) >> 8; 3320 3321 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3322 if (prli_rsp[i].code == code) 3323 return i; 3324 3325 return 0; 3326 } 3327 3328 /** 3329 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3330 * @evt: ibmvfc event struct 3331 * 3332 **/ 3333 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3334 { 3335 struct ibmvfc_target *tgt = evt->tgt; 3336 struct ibmvfc_host *vhost = evt->vhost; 3337 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3338 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3339 u32 status = rsp->common.status; 3340 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3341 3342 vhost->discovery_threads--; 3343 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3344 switch (status) { 3345 case IBMVFC_MAD_SUCCESS: 3346 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3347 parms->type, parms->flags, parms->service_parms); 3348 3349 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3350 index = ibmvfc_get_prli_rsp(parms->flags); 3351 if (prli_rsp[index].logged_in) { 3352 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) { 3353 tgt->need_login = 0; 3354 tgt->ids.roles = 0; 3355 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC) 3356 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3357 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC) 3358 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3359 tgt->add_rport = 1; 3360 } else 3361 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3362 } else if (prli_rsp[index].retry) 3363 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3364 else 3365 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3366 } else 3367 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3368 break; 3369 case IBMVFC_MAD_DRIVER_FAILED: 3370 break; 3371 case IBMVFC_MAD_CRQ_ERROR: 3372 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3373 break; 3374 case IBMVFC_MAD_FAILED: 3375 default: 3376 if ((rsp->status & IBMVFC_VIOS_FAILURE) && rsp->error == IBMVFC_PLOGI_REQUIRED) 3377 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3378 else if (tgt->logo_rcvd) 3379 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3380 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3381 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3382 else 3383 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3384 3385 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3386 ibmvfc_get_cmd_error(rsp->status, rsp->error), 3387 rsp->status, rsp->error, status); 3388 break; 3389 }; 3390 3391 kref_put(&tgt->kref, ibmvfc_release_tgt); 3392 ibmvfc_free_event(evt); 3393 wake_up(&vhost->work_wait_q); 3394 } 3395 3396 /** 3397 * ibmvfc_tgt_send_prli - Send a process login 3398 * @tgt: ibmvfc target struct 3399 * 3400 **/ 3401 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3402 { 3403 struct ibmvfc_process_login *prli; 3404 struct ibmvfc_host *vhost = tgt->vhost; 3405 struct ibmvfc_event *evt; 3406 3407 if (vhost->discovery_threads >= disc_threads) 3408 return; 3409 3410 kref_get(&tgt->kref); 3411 evt = ibmvfc_get_event(vhost); 3412 vhost->discovery_threads++; 3413 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 3414 evt->tgt = tgt; 3415 prli = &evt->iu.prli; 3416 memset(prli, 0, sizeof(*prli)); 3417 prli->common.version = 1; 3418 prli->common.opcode = IBMVFC_PROCESS_LOGIN; 3419 prli->common.length = sizeof(*prli); 3420 prli->scsi_id = tgt->scsi_id; 3421 3422 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 3423 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; 3424 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; 3425 3426 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3427 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3428 vhost->discovery_threads--; 3429 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3430 kref_put(&tgt->kref, ibmvfc_release_tgt); 3431 } else 3432 tgt_dbg(tgt, "Sent process login\n"); 3433 } 3434 3435 /** 3436 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 3437 * @evt: ibmvfc event struct 3438 * 3439 **/ 3440 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 3441 { 3442 struct ibmvfc_target *tgt = evt->tgt; 3443 struct ibmvfc_host *vhost = evt->vhost; 3444 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 3445 u32 status = rsp->common.status; 3446 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3447 3448 vhost->discovery_threads--; 3449 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3450 switch (status) { 3451 case IBMVFC_MAD_SUCCESS: 3452 tgt_dbg(tgt, "Port Login succeeded\n"); 3453 if (tgt->ids.port_name && 3454 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 3455 vhost->reinit = 1; 3456 tgt_dbg(tgt, "Port re-init required\n"); 3457 break; 3458 } 3459 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3460 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3461 tgt->ids.port_id = tgt->scsi_id; 3462 memcpy(&tgt->service_parms, &rsp->service_parms, 3463 sizeof(tgt->service_parms)); 3464 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3465 sizeof(tgt->service_parms_change)); 3466 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3467 break; 3468 case IBMVFC_MAD_DRIVER_FAILED: 3469 break; 3470 case IBMVFC_MAD_CRQ_ERROR: 3471 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3472 break; 3473 case IBMVFC_MAD_FAILED: 3474 default: 3475 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3476 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3477 else 3478 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3479 3480 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3481 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3482 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3483 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); 3484 break; 3485 }; 3486 3487 kref_put(&tgt->kref, ibmvfc_release_tgt); 3488 ibmvfc_free_event(evt); 3489 wake_up(&vhost->work_wait_q); 3490 } 3491 3492 /** 3493 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3494 * @tgt: ibmvfc target struct 3495 * 3496 **/ 3497 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3498 { 3499 struct ibmvfc_port_login *plogi; 3500 struct ibmvfc_host *vhost = tgt->vhost; 3501 struct ibmvfc_event *evt; 3502 3503 if (vhost->discovery_threads >= disc_threads) 3504 return; 3505 3506 kref_get(&tgt->kref); 3507 tgt->logo_rcvd = 0; 3508 evt = ibmvfc_get_event(vhost); 3509 vhost->discovery_threads++; 3510 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3511 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3512 evt->tgt = tgt; 3513 plogi = &evt->iu.plogi; 3514 memset(plogi, 0, sizeof(*plogi)); 3515 plogi->common.version = 1; 3516 plogi->common.opcode = IBMVFC_PORT_LOGIN; 3517 plogi->common.length = sizeof(*plogi); 3518 plogi->scsi_id = tgt->scsi_id; 3519 3520 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3521 vhost->discovery_threads--; 3522 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3523 kref_put(&tgt->kref, ibmvfc_release_tgt); 3524 } else 3525 tgt_dbg(tgt, "Sent port login\n"); 3526 } 3527 3528 /** 3529 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3530 * @evt: ibmvfc event struct 3531 * 3532 **/ 3533 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3534 { 3535 struct ibmvfc_target *tgt = evt->tgt; 3536 struct ibmvfc_host *vhost = evt->vhost; 3537 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3538 u32 status = rsp->common.status; 3539 3540 vhost->discovery_threads--; 3541 ibmvfc_free_event(evt); 3542 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3543 3544 switch (status) { 3545 case IBMVFC_MAD_SUCCESS: 3546 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3547 break; 3548 case IBMVFC_MAD_DRIVER_FAILED: 3549 kref_put(&tgt->kref, ibmvfc_release_tgt); 3550 wake_up(&vhost->work_wait_q); 3551 return; 3552 case IBMVFC_MAD_FAILED: 3553 default: 3554 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3555 break; 3556 }; 3557 3558 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3559 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3560 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3561 tgt->scsi_id != tgt->new_scsi_id) 3562 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3563 kref_put(&tgt->kref, ibmvfc_release_tgt); 3564 wake_up(&vhost->work_wait_q); 3565 } 3566 3567 /** 3568 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3569 * @tgt: ibmvfc target struct 3570 * 3571 **/ 3572 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3573 { 3574 struct ibmvfc_implicit_logout *mad; 3575 struct ibmvfc_host *vhost = tgt->vhost; 3576 struct ibmvfc_event *evt; 3577 3578 if (vhost->discovery_threads >= disc_threads) 3579 return; 3580 3581 kref_get(&tgt->kref); 3582 evt = ibmvfc_get_event(vhost); 3583 vhost->discovery_threads++; 3584 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3585 evt->tgt = tgt; 3586 mad = &evt->iu.implicit_logout; 3587 memset(mad, 0, sizeof(*mad)); 3588 mad->common.version = 1; 3589 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; 3590 mad->common.length = sizeof(*mad); 3591 mad->old_scsi_id = tgt->scsi_id; 3592 3593 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3594 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3595 vhost->discovery_threads--; 3596 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3597 kref_put(&tgt->kref, ibmvfc_release_tgt); 3598 } else 3599 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3600 } 3601 3602 /** 3603 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3604 * @mad: ibmvfc passthru mad struct 3605 * @tgt: ibmvfc target struct 3606 * 3607 * Returns: 3608 * 1 if PLOGI needed / 0 if PLOGI not needed 3609 **/ 3610 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3611 struct ibmvfc_target *tgt) 3612 { 3613 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3614 sizeof(tgt->ids.port_name))) 3615 return 1; 3616 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3617 sizeof(tgt->ids.node_name))) 3618 return 1; 3619 if (mad->fc_iu.response[6] != tgt->scsi_id) 3620 return 1; 3621 return 0; 3622 } 3623 3624 /** 3625 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3626 * @evt: ibmvfc event struct 3627 * 3628 **/ 3629 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3630 { 3631 struct ibmvfc_target *tgt = evt->tgt; 3632 struct ibmvfc_host *vhost = evt->vhost; 3633 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3634 u32 status = mad->common.status; 3635 u8 fc_reason, fc_explain; 3636 3637 vhost->discovery_threads--; 3638 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3639 del_timer(&tgt->timer); 3640 3641 switch (status) { 3642 case IBMVFC_MAD_SUCCESS: 3643 tgt_dbg(tgt, "ADISC succeeded\n"); 3644 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3645 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3646 break; 3647 case IBMVFC_MAD_DRIVER_FAILED: 3648 break; 3649 case IBMVFC_MAD_FAILED: 3650 default: 3651 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3652 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; 3653 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; 3654 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3655 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), 3656 mad->iu.status, mad->iu.error, 3657 ibmvfc_get_fc_type(fc_reason), fc_reason, 3658 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3659 break; 3660 }; 3661 3662 kref_put(&tgt->kref, ibmvfc_release_tgt); 3663 ibmvfc_free_event(evt); 3664 wake_up(&vhost->work_wait_q); 3665 } 3666 3667 /** 3668 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3669 * @evt: ibmvfc event struct 3670 * 3671 **/ 3672 static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3673 { 3674 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3675 3676 memset(mad, 0, sizeof(*mad)); 3677 mad->common.version = 1; 3678 mad->common.opcode = IBMVFC_PASSTHRU; 3679 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 3680 mad->cmd_ioba.va = (u64)evt->crq.ioba + 3681 offsetof(struct ibmvfc_passthru_mad, iu); 3682 mad->cmd_ioba.len = sizeof(mad->iu); 3683 mad->iu.cmd_len = sizeof(mad->fc_iu.payload); 3684 mad->iu.rsp_len = sizeof(mad->fc_iu.response); 3685 mad->iu.cmd.va = (u64)evt->crq.ioba + 3686 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3687 offsetof(struct ibmvfc_passthru_fc_iu, payload); 3688 mad->iu.cmd.len = sizeof(mad->fc_iu.payload); 3689 mad->iu.rsp.va = (u64)evt->crq.ioba + 3690 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3691 offsetof(struct ibmvfc_passthru_fc_iu, response); 3692 mad->iu.rsp.len = sizeof(mad->fc_iu.response); 3693 } 3694 3695 /** 3696 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3697 * @evt: ibmvfc event struct 3698 * 3699 * Just cleanup this event struct. Everything else is handled by 3700 * the ADISC completion handler. If the ADISC never actually comes 3701 * back, we still have the timer running on the ADISC event struct 3702 * which will fire and cause the CRQ to get reset. 3703 * 3704 **/ 3705 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3706 { 3707 struct ibmvfc_host *vhost = evt->vhost; 3708 struct ibmvfc_target *tgt = evt->tgt; 3709 3710 tgt_dbg(tgt, "ADISC cancel complete\n"); 3711 vhost->abort_threads--; 3712 ibmvfc_free_event(evt); 3713 kref_put(&tgt->kref, ibmvfc_release_tgt); 3714 wake_up(&vhost->work_wait_q); 3715 } 3716 3717 /** 3718 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3719 * @tgt: ibmvfc target struct 3720 * 3721 * If an ADISC times out, send a cancel. If the cancel times 3722 * out, reset the CRQ. When the ADISC comes back as cancelled, 3723 * log back into the target. 3724 **/ 3725 static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) 3726 { 3727 struct ibmvfc_host *vhost = tgt->vhost; 3728 struct ibmvfc_event *evt; 3729 struct ibmvfc_tmf *tmf; 3730 unsigned long flags; 3731 int rc; 3732 3733 tgt_dbg(tgt, "ADISC timeout\n"); 3734 spin_lock_irqsave(vhost->host->host_lock, flags); 3735 if (vhost->abort_threads >= disc_threads || 3736 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3737 vhost->state != IBMVFC_INITIALIZING || 3738 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3739 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3740 return; 3741 } 3742 3743 vhost->abort_threads++; 3744 kref_get(&tgt->kref); 3745 evt = ibmvfc_get_event(vhost); 3746 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3747 3748 evt->tgt = tgt; 3749 tmf = &evt->iu.tmf; 3750 memset(tmf, 0, sizeof(*tmf)); 3751 tmf->common.version = 1; 3752 tmf->common.opcode = IBMVFC_TMF_MAD; 3753 tmf->common.length = sizeof(*tmf); 3754 tmf->scsi_id = tgt->scsi_id; 3755 tmf->cancel_key = tgt->cancel_key; 3756 3757 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3758 3759 if (rc) { 3760 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3761 vhost->abort_threads--; 3762 kref_put(&tgt->kref, ibmvfc_release_tgt); 3763 __ibmvfc_reset_host(vhost); 3764 } else 3765 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3766 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3767 } 3768 3769 /** 3770 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3771 * @tgt: ibmvfc target struct 3772 * 3773 * When sending an ADISC we end up with two timers running. The 3774 * first timer is the timer in the ibmvfc target struct. If this 3775 * fires, we send a cancel to the target. The second timer is the 3776 * timer on the ibmvfc event for the ADISC, which is longer. If that 3777 * fires, it means the ADISC timed out and our attempt to cancel it 3778 * also failed, so we need to reset the CRQ. 3779 **/ 3780 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3781 { 3782 struct ibmvfc_passthru_mad *mad; 3783 struct ibmvfc_host *vhost = tgt->vhost; 3784 struct ibmvfc_event *evt; 3785 3786 if (vhost->discovery_threads >= disc_threads) 3787 return; 3788 3789 kref_get(&tgt->kref); 3790 evt = ibmvfc_get_event(vhost); 3791 vhost->discovery_threads++; 3792 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3793 evt->tgt = tgt; 3794 3795 ibmvfc_init_passthru(evt); 3796 mad = &evt->iu.passthru; 3797 mad->iu.flags = IBMVFC_FC_ELS; 3798 mad->iu.scsi_id = tgt->scsi_id; 3799 mad->iu.cancel_key = tgt->cancel_key; 3800 3801 mad->fc_iu.payload[0] = IBMVFC_ADISC; 3802 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3803 sizeof(vhost->login_buf->resp.port_name)); 3804 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3805 sizeof(vhost->login_buf->resp.node_name)); 3806 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; 3807 3808 if (timer_pending(&tgt->timer)) 3809 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3810 else { 3811 tgt->timer.data = (unsigned long) tgt; 3812 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3813 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; 3814 add_timer(&tgt->timer); 3815 } 3816 3817 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3818 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3819 vhost->discovery_threads--; 3820 del_timer(&tgt->timer); 3821 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3822 kref_put(&tgt->kref, ibmvfc_release_tgt); 3823 } else 3824 tgt_dbg(tgt, "Sent ADISC\n"); 3825 } 3826 3827 /** 3828 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3829 * @evt: ibmvfc event struct 3830 * 3831 **/ 3832 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3833 { 3834 struct ibmvfc_target *tgt = evt->tgt; 3835 struct ibmvfc_host *vhost = evt->vhost; 3836 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3837 u32 status = rsp->common.status; 3838 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3839 3840 vhost->discovery_threads--; 3841 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3842 switch (status) { 3843 case IBMVFC_MAD_SUCCESS: 3844 tgt_dbg(tgt, "Query Target succeeded\n"); 3845 tgt->new_scsi_id = rsp->scsi_id; 3846 if (rsp->scsi_id != tgt->scsi_id) 3847 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3848 else 3849 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3850 break; 3851 case IBMVFC_MAD_DRIVER_FAILED: 3852 break; 3853 case IBMVFC_MAD_CRQ_ERROR: 3854 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3855 break; 3856 case IBMVFC_MAD_FAILED: 3857 default: 3858 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3859 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && 3860 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) 3861 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3862 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3863 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3864 else 3865 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3866 3867 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3868 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3869 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3870 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); 3871 break; 3872 }; 3873 3874 kref_put(&tgt->kref, ibmvfc_release_tgt); 3875 ibmvfc_free_event(evt); 3876 wake_up(&vhost->work_wait_q); 3877 } 3878 3879 /** 3880 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3881 * @tgt: ibmvfc target struct 3882 * 3883 **/ 3884 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3885 { 3886 struct ibmvfc_query_tgt *query_tgt; 3887 struct ibmvfc_host *vhost = tgt->vhost; 3888 struct ibmvfc_event *evt; 3889 3890 if (vhost->discovery_threads >= disc_threads) 3891 return; 3892 3893 kref_get(&tgt->kref); 3894 evt = ibmvfc_get_event(vhost); 3895 vhost->discovery_threads++; 3896 evt->tgt = tgt; 3897 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3898 query_tgt = &evt->iu.query_tgt; 3899 memset(query_tgt, 0, sizeof(*query_tgt)); 3900 query_tgt->common.version = 1; 3901 query_tgt->common.opcode = IBMVFC_QUERY_TARGET; 3902 query_tgt->common.length = sizeof(*query_tgt); 3903 query_tgt->wwpn = tgt->ids.port_name; 3904 3905 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3906 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3907 vhost->discovery_threads--; 3908 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3909 kref_put(&tgt->kref, ibmvfc_release_tgt); 3910 } else 3911 tgt_dbg(tgt, "Sent Query Target\n"); 3912 } 3913 3914 /** 3915 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3916 * @vhost: ibmvfc host struct 3917 * @scsi_id: SCSI ID to allocate target for 3918 * 3919 * Returns: 3920 * 0 on success / other on failure 3921 **/ 3922 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3923 { 3924 struct ibmvfc_target *tgt; 3925 unsigned long flags; 3926 3927 spin_lock_irqsave(vhost->host->host_lock, flags); 3928 list_for_each_entry(tgt, &vhost->targets, queue) { 3929 if (tgt->scsi_id == scsi_id) { 3930 if (tgt->need_login) 3931 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3932 goto unlock_out; 3933 } 3934 } 3935 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3936 3937 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3938 if (!tgt) { 3939 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", 3940 scsi_id); 3941 return -ENOMEM; 3942 } 3943 3944 memset(tgt, 0, sizeof(*tgt)); 3945 tgt->scsi_id = scsi_id; 3946 tgt->new_scsi_id = scsi_id; 3947 tgt->vhost = vhost; 3948 tgt->need_login = 1; 3949 tgt->cancel_key = vhost->task_set++; 3950 init_timer(&tgt->timer); 3951 kref_init(&tgt->kref); 3952 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3953 spin_lock_irqsave(vhost->host->host_lock, flags); 3954 list_add_tail(&tgt->queue, &vhost->targets); 3955 3956 unlock_out: 3957 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3958 return 0; 3959 } 3960 3961 /** 3962 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3963 * @vhost: ibmvfc host struct 3964 * 3965 * Returns: 3966 * 0 on success / other on failure 3967 **/ 3968 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3969 { 3970 int i, rc; 3971 3972 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3973 rc = ibmvfc_alloc_target(vhost, 3974 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); 3975 3976 return rc; 3977 } 3978 3979 /** 3980 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3981 * @evt: ibmvfc event struct 3982 * 3983 **/ 3984 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3985 { 3986 struct ibmvfc_host *vhost = evt->vhost; 3987 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3988 u32 mad_status = rsp->common.status; 3989 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3990 3991 switch (mad_status) { 3992 case IBMVFC_MAD_SUCCESS: 3993 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3994 vhost->num_targets = rsp->num_written; 3995 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3996 break; 3997 case IBMVFC_MAD_FAILED: 3998 level += ibmvfc_retry_host_init(vhost); 3999 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 4000 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 4001 break; 4002 case IBMVFC_MAD_DRIVER_FAILED: 4003 break; 4004 default: 4005 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 4006 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4007 break; 4008 } 4009 4010 ibmvfc_free_event(evt); 4011 wake_up(&vhost->work_wait_q); 4012 } 4013 4014 /** 4015 * ibmvfc_discover_targets - Send Discover Targets MAD 4016 * @vhost: ibmvfc host struct 4017 * 4018 **/ 4019 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 4020 { 4021 struct ibmvfc_discover_targets *mad; 4022 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4023 4024 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 4025 mad = &evt->iu.discover_targets; 4026 memset(mad, 0, sizeof(*mad)); 4027 mad->common.version = 1; 4028 mad->common.opcode = IBMVFC_DISC_TARGETS; 4029 mad->common.length = sizeof(*mad); 4030 mad->bufflen = vhost->disc_buf_sz; 4031 mad->buffer.va = vhost->disc_buf_dma; 4032 mad->buffer.len = vhost->disc_buf_sz; 4033 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4034 4035 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4036 ibmvfc_dbg(vhost, "Sent discover targets\n"); 4037 else 4038 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4039 } 4040 4041 /** 4042 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 4043 * @evt: ibmvfc event struct 4044 * 4045 **/ 4046 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 4047 { 4048 struct ibmvfc_host *vhost = evt->vhost; 4049 u32 mad_status = evt->xfer_iu->npiv_login.common.status; 4050 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 4051 unsigned int npiv_max_sectors; 4052 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4053 4054 switch (mad_status) { 4055 case IBMVFC_MAD_SUCCESS: 4056 ibmvfc_free_event(evt); 4057 break; 4058 case IBMVFC_MAD_FAILED: 4059 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 4060 level += ibmvfc_retry_host_init(vhost); 4061 else 4062 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4063 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 4064 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 4065 ibmvfc_free_event(evt); 4066 return; 4067 case IBMVFC_MAD_CRQ_ERROR: 4068 ibmvfc_retry_host_init(vhost); 4069 case IBMVFC_MAD_DRIVER_FAILED: 4070 ibmvfc_free_event(evt); 4071 return; 4072 default: 4073 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 4074 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4075 ibmvfc_free_event(evt); 4076 return; 4077 } 4078 4079 vhost->client_migrated = 0; 4080 4081 if (!(rsp->flags & IBMVFC_NATIVE_FC)) { 4082 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 4083 rsp->flags); 4084 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4085 wake_up(&vhost->work_wait_q); 4086 return; 4087 } 4088 4089 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { 4090 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 4091 rsp->max_cmds); 4092 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4093 wake_up(&vhost->work_wait_q); 4094 return; 4095 } 4096 4097 vhost->logged_in = 1; 4098 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); 4099 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 4100 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 4101 rsp->drc_name, npiv_max_sectors); 4102 4103 fc_host_fabric_name(vhost->host) = rsp->node_name; 4104 fc_host_node_name(vhost->host) = rsp->node_name; 4105 fc_host_port_name(vhost->host) = rsp->port_name; 4106 fc_host_port_id(vhost->host) = rsp->scsi_id; 4107 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 4108 fc_host_supported_classes(vhost->host) = 0; 4109 if (rsp->service_parms.class1_parms[0] & 0x80000000) 4110 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 4111 if (rsp->service_parms.class2_parms[0] & 0x80000000) 4112 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 4113 if (rsp->service_parms.class3_parms[0] & 0x80000000) 4114 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 4115 fc_host_maxframe_size(vhost->host) = 4116 rsp->service_parms.common.bb_rcv_sz & 0x0fff; 4117 4118 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; 4119 vhost->host->max_sectors = npiv_max_sectors; 4120 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4121 wake_up(&vhost->work_wait_q); 4122 } 4123 4124 /** 4125 * ibmvfc_npiv_login - Sends NPIV login 4126 * @vhost: ibmvfc host struct 4127 * 4128 **/ 4129 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 4130 { 4131 struct ibmvfc_npiv_login_mad *mad; 4132 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4133 4134 ibmvfc_gather_partition_info(vhost); 4135 ibmvfc_set_login_info(vhost); 4136 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 4137 4138 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 4139 mad = &evt->iu.npiv_login; 4140 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 4141 mad->common.version = 1; 4142 mad->common.opcode = IBMVFC_NPIV_LOGIN; 4143 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); 4144 mad->buffer.va = vhost->login_buf_dma; 4145 mad->buffer.len = sizeof(*vhost->login_buf); 4146 4147 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4148 4149 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4150 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 4151 else 4152 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4153 }; 4154 4155 /** 4156 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 4157 * @vhost: ibmvfc host struct 4158 * 4159 **/ 4160 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 4161 { 4162 struct ibmvfc_host *vhost = evt->vhost; 4163 u32 mad_status = evt->xfer_iu->npiv_logout.common.status; 4164 4165 ibmvfc_free_event(evt); 4166 4167 switch (mad_status) { 4168 case IBMVFC_MAD_SUCCESS: 4169 if (list_empty(&vhost->sent) && 4170 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 4171 ibmvfc_init_host(vhost); 4172 return; 4173 } 4174 break; 4175 case IBMVFC_MAD_FAILED: 4176 case IBMVFC_MAD_NOT_SUPPORTED: 4177 case IBMVFC_MAD_CRQ_ERROR: 4178 case IBMVFC_MAD_DRIVER_FAILED: 4179 default: 4180 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 4181 break; 4182 } 4183 4184 ibmvfc_hard_reset_host(vhost); 4185 } 4186 4187 /** 4188 * ibmvfc_npiv_logout - Issue an NPIV Logout 4189 * @vhost: ibmvfc host struct 4190 * 4191 **/ 4192 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 4193 { 4194 struct ibmvfc_npiv_logout_mad *mad; 4195 struct ibmvfc_event *evt; 4196 4197 evt = ibmvfc_get_event(vhost); 4198 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 4199 4200 mad = &evt->iu.npiv_logout; 4201 memset(mad, 0, sizeof(*mad)); 4202 mad->common.version = 1; 4203 mad->common.opcode = IBMVFC_NPIV_LOGOUT; 4204 mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad); 4205 4206 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 4207 4208 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4209 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 4210 else 4211 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4212 } 4213 4214 /** 4215 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 4216 * @vhost: ibmvfc host struct 4217 * 4218 * Returns: 4219 * 1 if work to do / 0 if not 4220 **/ 4221 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 4222 { 4223 struct ibmvfc_target *tgt; 4224 4225 list_for_each_entry(tgt, &vhost->targets, queue) { 4226 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 4227 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4228 return 1; 4229 } 4230 4231 return 0; 4232 } 4233 4234 /** 4235 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 4236 * @vhost: ibmvfc host struct 4237 * 4238 * Returns: 4239 * 1 if work to do / 0 if not 4240 **/ 4241 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4242 { 4243 struct ibmvfc_target *tgt; 4244 4245 if (kthread_should_stop()) 4246 return 1; 4247 switch (vhost->action) { 4248 case IBMVFC_HOST_ACTION_NONE: 4249 case IBMVFC_HOST_ACTION_INIT_WAIT: 4250 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4251 return 0; 4252 case IBMVFC_HOST_ACTION_TGT_INIT: 4253 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4254 if (vhost->discovery_threads == disc_threads) 4255 return 0; 4256 list_for_each_entry(tgt, &vhost->targets, queue) 4257 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 4258 return 1; 4259 list_for_each_entry(tgt, &vhost->targets, queue) 4260 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4261 return 0; 4262 return 1; 4263 case IBMVFC_HOST_ACTION_LOGO: 4264 case IBMVFC_HOST_ACTION_INIT: 4265 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4266 case IBMVFC_HOST_ACTION_TGT_DEL: 4267 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4268 case IBMVFC_HOST_ACTION_QUERY: 4269 case IBMVFC_HOST_ACTION_RESET: 4270 case IBMVFC_HOST_ACTION_REENABLE: 4271 default: 4272 break; 4273 }; 4274 4275 return 1; 4276 } 4277 4278 /** 4279 * ibmvfc_work_to_do - Is there task level work to do? 4280 * @vhost: ibmvfc host struct 4281 * 4282 * Returns: 4283 * 1 if work to do / 0 if not 4284 **/ 4285 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4286 { 4287 unsigned long flags; 4288 int rc; 4289 4290 spin_lock_irqsave(vhost->host->host_lock, flags); 4291 rc = __ibmvfc_work_to_do(vhost); 4292 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4293 return rc; 4294 } 4295 4296 /** 4297 * ibmvfc_log_ae - Log async events if necessary 4298 * @vhost: ibmvfc host struct 4299 * @events: events to log 4300 * 4301 **/ 4302 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 4303 { 4304 if (events & IBMVFC_AE_RSCN) 4305 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 4306 if ((events & IBMVFC_AE_LINKDOWN) && 4307 vhost->state >= IBMVFC_HALTED) 4308 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 4309 if ((events & IBMVFC_AE_LINKUP) && 4310 vhost->state == IBMVFC_INITIALIZING) 4311 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 4312 } 4313 4314 /** 4315 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 4316 * @tgt: ibmvfc target struct 4317 * 4318 **/ 4319 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 4320 { 4321 struct ibmvfc_host *vhost = tgt->vhost; 4322 struct fc_rport *rport; 4323 unsigned long flags; 4324 4325 tgt_dbg(tgt, "Adding rport\n"); 4326 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 4327 spin_lock_irqsave(vhost->host->host_lock, flags); 4328 4329 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4330 tgt_dbg(tgt, "Deleting rport\n"); 4331 list_del(&tgt->queue); 4332 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4333 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4334 fc_remote_port_delete(rport); 4335 del_timer_sync(&tgt->timer); 4336 kref_put(&tgt->kref, ibmvfc_release_tgt); 4337 return; 4338 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 4339 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4340 return; 4341 } 4342 4343 if (rport) { 4344 tgt_dbg(tgt, "rport add succeeded\n"); 4345 tgt->rport = rport; 4346 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; 4347 rport->supported_classes = 0; 4348 tgt->target_id = rport->scsi_target_id; 4349 if (tgt->service_parms.class1_parms[0] & 0x80000000) 4350 rport->supported_classes |= FC_COS_CLASS1; 4351 if (tgt->service_parms.class2_parms[0] & 0x80000000) 4352 rport->supported_classes |= FC_COS_CLASS2; 4353 if (tgt->service_parms.class3_parms[0] & 0x80000000) 4354 rport->supported_classes |= FC_COS_CLASS3; 4355 if (rport->rqst_q) 4356 blk_queue_max_segments(rport->rqst_q, 1); 4357 } else 4358 tgt_dbg(tgt, "rport add failed\n"); 4359 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4360 } 4361 4362 /** 4363 * ibmvfc_do_work - Do task level work 4364 * @vhost: ibmvfc host struct 4365 * 4366 **/ 4367 static void ibmvfc_do_work(struct ibmvfc_host *vhost) 4368 { 4369 struct ibmvfc_target *tgt; 4370 unsigned long flags; 4371 struct fc_rport *rport; 4372 int rc; 4373 4374 ibmvfc_log_ae(vhost, vhost->events_to_log); 4375 spin_lock_irqsave(vhost->host->host_lock, flags); 4376 vhost->events_to_log = 0; 4377 switch (vhost->action) { 4378 case IBMVFC_HOST_ACTION_NONE: 4379 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4380 case IBMVFC_HOST_ACTION_INIT_WAIT: 4381 break; 4382 case IBMVFC_HOST_ACTION_RESET: 4383 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4384 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4385 rc = ibmvfc_reset_crq(vhost); 4386 spin_lock_irqsave(vhost->host->host_lock, flags); 4387 if (rc == H_CLOSED) 4388 vio_enable_interrupts(to_vio_dev(vhost->dev)); 4389 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 4390 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 4391 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4392 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 4393 } 4394 break; 4395 case IBMVFC_HOST_ACTION_REENABLE: 4396 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4397 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4398 rc = ibmvfc_reenable_crq_queue(vhost); 4399 spin_lock_irqsave(vhost->host->host_lock, flags); 4400 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 4401 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4402 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 4403 } 4404 break; 4405 case IBMVFC_HOST_ACTION_LOGO: 4406 vhost->job_step(vhost); 4407 break; 4408 case IBMVFC_HOST_ACTION_INIT: 4409 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 4410 if (vhost->delay_init) { 4411 vhost->delay_init = 0; 4412 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4413 ssleep(15); 4414 return; 4415 } else 4416 vhost->job_step(vhost); 4417 break; 4418 case IBMVFC_HOST_ACTION_QUERY: 4419 list_for_each_entry(tgt, &vhost->targets, queue) 4420 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 4421 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 4422 break; 4423 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4424 list_for_each_entry(tgt, &vhost->targets, queue) { 4425 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4426 tgt->job_step(tgt); 4427 break; 4428 } 4429 } 4430 4431 if (!ibmvfc_dev_init_to_do(vhost)) 4432 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 4433 break; 4434 case IBMVFC_HOST_ACTION_TGT_DEL: 4435 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4436 list_for_each_entry(tgt, &vhost->targets, queue) { 4437 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4438 tgt_dbg(tgt, "Deleting rport\n"); 4439 rport = tgt->rport; 4440 tgt->rport = NULL; 4441 list_del(&tgt->queue); 4442 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4443 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4444 if (rport) 4445 fc_remote_port_delete(rport); 4446 del_timer_sync(&tgt->timer); 4447 kref_put(&tgt->kref, ibmvfc_release_tgt); 4448 return; 4449 } 4450 } 4451 4452 if (vhost->state == IBMVFC_INITIALIZING) { 4453 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 4454 if (vhost->reinit) { 4455 vhost->reinit = 0; 4456 scsi_block_requests(vhost->host); 4457 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4458 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4459 } else { 4460 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 4461 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4462 wake_up(&vhost->init_wait_q); 4463 schedule_work(&vhost->rport_add_work_q); 4464 vhost->init_retries = 0; 4465 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4466 scsi_unblock_requests(vhost->host); 4467 } 4468 4469 return; 4470 } else { 4471 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 4472 vhost->job_step = ibmvfc_discover_targets; 4473 } 4474 } else { 4475 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4476 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4477 scsi_unblock_requests(vhost->host); 4478 wake_up(&vhost->init_wait_q); 4479 return; 4480 } 4481 break; 4482 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4483 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4484 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4485 ibmvfc_alloc_targets(vhost); 4486 spin_lock_irqsave(vhost->host->host_lock, flags); 4487 break; 4488 case IBMVFC_HOST_ACTION_TGT_INIT: 4489 list_for_each_entry(tgt, &vhost->targets, queue) { 4490 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4491 tgt->job_step(tgt); 4492 break; 4493 } 4494 } 4495 4496 if (!ibmvfc_dev_init_to_do(vhost)) 4497 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4498 break; 4499 default: 4500 break; 4501 }; 4502 4503 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4504 } 4505 4506 /** 4507 * ibmvfc_work - Do task level work 4508 * @data: ibmvfc host struct 4509 * 4510 * Returns: 4511 * zero 4512 **/ 4513 static int ibmvfc_work(void *data) 4514 { 4515 struct ibmvfc_host *vhost = data; 4516 int rc; 4517 4518 set_user_nice(current, -20); 4519 4520 while (1) { 4521 rc = wait_event_interruptible(vhost->work_wait_q, 4522 ibmvfc_work_to_do(vhost)); 4523 4524 BUG_ON(rc); 4525 4526 if (kthread_should_stop()) 4527 break; 4528 4529 ibmvfc_do_work(vhost); 4530 } 4531 4532 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4533 return 0; 4534 } 4535 4536 /** 4537 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4538 * @vhost: ibmvfc host struct 4539 * 4540 * Allocates a page for messages, maps it for dma, and registers 4541 * the crq with the hypervisor. 4542 * 4543 * Return value: 4544 * zero on success / other on failure 4545 **/ 4546 static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4547 { 4548 int rc, retrc = -ENOMEM; 4549 struct device *dev = vhost->dev; 4550 struct vio_dev *vdev = to_vio_dev(dev); 4551 struct ibmvfc_crq_queue *crq = &vhost->crq; 4552 4553 ENTER; 4554 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4555 4556 if (!crq->msgs) 4557 return -ENOMEM; 4558 4559 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4560 crq->msg_token = dma_map_single(dev, crq->msgs, 4561 PAGE_SIZE, DMA_BIDIRECTIONAL); 4562 4563 if (dma_mapping_error(dev, crq->msg_token)) 4564 goto map_failed; 4565 4566 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4567 crq->msg_token, PAGE_SIZE); 4568 4569 if (rc == H_RESOURCE) 4570 /* maybe kexecing and resource is busy. try a reset */ 4571 retrc = rc = ibmvfc_reset_crq(vhost); 4572 4573 if (rc == H_CLOSED) 4574 dev_warn(dev, "Partner adapter not ready\n"); 4575 else if (rc) { 4576 dev_warn(dev, "Error %d opening adapter\n", rc); 4577 goto reg_crq_failed; 4578 } 4579 4580 retrc = 0; 4581 4582 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4583 4584 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4585 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4586 goto req_irq_failed; 4587 } 4588 4589 if ((rc = vio_enable_interrupts(vdev))) { 4590 dev_err(dev, "Error %d enabling interrupts\n", rc); 4591 goto req_irq_failed; 4592 } 4593 4594 crq->cur = 0; 4595 LEAVE; 4596 return retrc; 4597 4598 req_irq_failed: 4599 tasklet_kill(&vhost->tasklet); 4600 do { 4601 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4602 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4603 reg_crq_failed: 4604 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4605 map_failed: 4606 free_page((unsigned long)crq->msgs); 4607 return retrc; 4608 } 4609 4610 /** 4611 * ibmvfc_free_mem - Free memory for vhost 4612 * @vhost: ibmvfc host struct 4613 * 4614 * Return value: 4615 * none 4616 **/ 4617 static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4618 { 4619 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4620 4621 ENTER; 4622 mempool_destroy(vhost->tgt_pool); 4623 kfree(vhost->trace); 4624 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4625 vhost->disc_buf_dma); 4626 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4627 vhost->login_buf, vhost->login_buf_dma); 4628 dma_pool_destroy(vhost->sg_pool); 4629 dma_unmap_single(vhost->dev, async_q->msg_token, 4630 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4631 free_page((unsigned long)async_q->msgs); 4632 LEAVE; 4633 } 4634 4635 /** 4636 * ibmvfc_alloc_mem - Allocate memory for vhost 4637 * @vhost: ibmvfc host struct 4638 * 4639 * Return value: 4640 * 0 on success / non-zero on failure 4641 **/ 4642 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4643 { 4644 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4645 struct device *dev = vhost->dev; 4646 4647 ENTER; 4648 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4649 if (!async_q->msgs) { 4650 dev_err(dev, "Couldn't allocate async queue.\n"); 4651 goto nomem; 4652 } 4653 4654 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4655 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4656 async_q->size * sizeof(*async_q->msgs), 4657 DMA_BIDIRECTIONAL); 4658 4659 if (dma_mapping_error(dev, async_q->msg_token)) { 4660 dev_err(dev, "Failed to map async queue\n"); 4661 goto free_async_crq; 4662 } 4663 4664 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4665 SG_ALL * sizeof(struct srp_direct_buf), 4666 sizeof(struct srp_direct_buf), 0); 4667 4668 if (!vhost->sg_pool) { 4669 dev_err(dev, "Failed to allocate sg pool\n"); 4670 goto unmap_async_crq; 4671 } 4672 4673 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4674 &vhost->login_buf_dma, GFP_KERNEL); 4675 4676 if (!vhost->login_buf) { 4677 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4678 goto free_sg_pool; 4679 } 4680 4681 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4682 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4683 &vhost->disc_buf_dma, GFP_KERNEL); 4684 4685 if (!vhost->disc_buf) { 4686 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4687 goto free_login_buffer; 4688 } 4689 4690 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4691 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4692 4693 if (!vhost->trace) 4694 goto free_disc_buffer; 4695 4696 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4697 sizeof(struct ibmvfc_target)); 4698 4699 if (!vhost->tgt_pool) { 4700 dev_err(dev, "Couldn't allocate target memory pool\n"); 4701 goto free_trace; 4702 } 4703 4704 LEAVE; 4705 return 0; 4706 4707 free_trace: 4708 kfree(vhost->trace); 4709 free_disc_buffer: 4710 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4711 vhost->disc_buf_dma); 4712 free_login_buffer: 4713 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4714 vhost->login_buf, vhost->login_buf_dma); 4715 free_sg_pool: 4716 dma_pool_destroy(vhost->sg_pool); 4717 unmap_async_crq: 4718 dma_unmap_single(dev, async_q->msg_token, 4719 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4720 free_async_crq: 4721 free_page((unsigned long)async_q->msgs); 4722 nomem: 4723 LEAVE; 4724 return -ENOMEM; 4725 } 4726 4727 /** 4728 * ibmvfc_rport_add_thread - Worker thread for rport adds 4729 * @work: work struct 4730 * 4731 **/ 4732 static void ibmvfc_rport_add_thread(struct work_struct *work) 4733 { 4734 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4735 rport_add_work_q); 4736 struct ibmvfc_target *tgt; 4737 struct fc_rport *rport; 4738 unsigned long flags; 4739 int did_work; 4740 4741 ENTER; 4742 spin_lock_irqsave(vhost->host->host_lock, flags); 4743 do { 4744 did_work = 0; 4745 if (vhost->state != IBMVFC_ACTIVE) 4746 break; 4747 4748 list_for_each_entry(tgt, &vhost->targets, queue) { 4749 if (tgt->add_rport) { 4750 did_work = 1; 4751 tgt->add_rport = 0; 4752 kref_get(&tgt->kref); 4753 rport = tgt->rport; 4754 if (!rport) { 4755 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4756 ibmvfc_tgt_add_rport(tgt); 4757 } else if (get_device(&rport->dev)) { 4758 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4759 tgt_dbg(tgt, "Setting rport roles\n"); 4760 fc_remote_port_rolechg(rport, tgt->ids.roles); 4761 put_device(&rport->dev); 4762 } 4763 4764 kref_put(&tgt->kref, ibmvfc_release_tgt); 4765 spin_lock_irqsave(vhost->host->host_lock, flags); 4766 break; 4767 } 4768 } 4769 } while(did_work); 4770 4771 if (vhost->state == IBMVFC_ACTIVE) 4772 vhost->scan_complete = 1; 4773 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4774 LEAVE; 4775 } 4776 4777 /** 4778 * ibmvfc_probe - Adapter hot plug add entry point 4779 * @vdev: vio device struct 4780 * @id: vio device id struct 4781 * 4782 * Return value: 4783 * 0 on success / non-zero on failure 4784 **/ 4785 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4786 { 4787 struct ibmvfc_host *vhost; 4788 struct Scsi_Host *shost; 4789 struct device *dev = &vdev->dev; 4790 int rc = -ENOMEM; 4791 4792 ENTER; 4793 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4794 if (!shost) { 4795 dev_err(dev, "Couldn't allocate host data\n"); 4796 goto out; 4797 } 4798 4799 shost->transportt = ibmvfc_transport_template; 4800 shost->can_queue = max_requests; 4801 shost->max_lun = max_lun; 4802 shost->max_id = max_targets; 4803 shost->max_sectors = IBMVFC_MAX_SECTORS; 4804 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4805 shost->unique_id = shost->host_no; 4806 4807 vhost = shost_priv(shost); 4808 INIT_LIST_HEAD(&vhost->sent); 4809 INIT_LIST_HEAD(&vhost->free); 4810 INIT_LIST_HEAD(&vhost->targets); 4811 sprintf(vhost->name, IBMVFC_NAME); 4812 vhost->host = shost; 4813 vhost->dev = dev; 4814 vhost->partition_number = -1; 4815 vhost->log_level = log_level; 4816 vhost->task_set = 1; 4817 strcpy(vhost->partition_name, "UNKNOWN"); 4818 init_waitqueue_head(&vhost->work_wait_q); 4819 init_waitqueue_head(&vhost->init_wait_q); 4820 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4821 mutex_init(&vhost->passthru_mutex); 4822 4823 if ((rc = ibmvfc_alloc_mem(vhost))) 4824 goto free_scsi_host; 4825 4826 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4827 shost->host_no); 4828 4829 if (IS_ERR(vhost->work_thread)) { 4830 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4831 PTR_ERR(vhost->work_thread)); 4832 goto free_host_mem; 4833 } 4834 4835 if ((rc = ibmvfc_init_crq(vhost))) { 4836 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4837 goto kill_kthread; 4838 } 4839 4840 if ((rc = ibmvfc_init_event_pool(vhost))) { 4841 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4842 goto release_crq; 4843 } 4844 4845 if ((rc = scsi_add_host(shost, dev))) 4846 goto release_event_pool; 4847 4848 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 4849 4850 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4851 &ibmvfc_trace_attr))) { 4852 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4853 goto remove_shost; 4854 } 4855 4856 if (shost_to_fc_host(shost)->rqst_q) 4857 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 4858 dev_set_drvdata(dev, vhost); 4859 spin_lock(&ibmvfc_driver_lock); 4860 list_add_tail(&vhost->queue, &ibmvfc_head); 4861 spin_unlock(&ibmvfc_driver_lock); 4862 4863 ibmvfc_send_crq_init(vhost); 4864 scsi_scan_host(shost); 4865 return 0; 4866 4867 remove_shost: 4868 scsi_remove_host(shost); 4869 release_event_pool: 4870 ibmvfc_free_event_pool(vhost); 4871 release_crq: 4872 ibmvfc_release_crq_queue(vhost); 4873 kill_kthread: 4874 kthread_stop(vhost->work_thread); 4875 free_host_mem: 4876 ibmvfc_free_mem(vhost); 4877 free_scsi_host: 4878 scsi_host_put(shost); 4879 out: 4880 LEAVE; 4881 return rc; 4882 } 4883 4884 /** 4885 * ibmvfc_remove - Adapter hot plug remove entry point 4886 * @vdev: vio device struct 4887 * 4888 * Return value: 4889 * 0 4890 **/ 4891 static int ibmvfc_remove(struct vio_dev *vdev) 4892 { 4893 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4894 unsigned long flags; 4895 4896 ENTER; 4897 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4898 4899 spin_lock_irqsave(vhost->host->host_lock, flags); 4900 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4901 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4902 4903 ibmvfc_wait_while_resetting(vhost); 4904 ibmvfc_release_crq_queue(vhost); 4905 kthread_stop(vhost->work_thread); 4906 fc_remove_host(vhost->host); 4907 scsi_remove_host(vhost->host); 4908 4909 spin_lock_irqsave(vhost->host->host_lock, flags); 4910 ibmvfc_purge_requests(vhost, DID_ERROR); 4911 ibmvfc_free_event_pool(vhost); 4912 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4913 4914 ibmvfc_free_mem(vhost); 4915 spin_lock(&ibmvfc_driver_lock); 4916 list_del(&vhost->queue); 4917 spin_unlock(&ibmvfc_driver_lock); 4918 scsi_host_put(vhost->host); 4919 LEAVE; 4920 return 0; 4921 } 4922 4923 /** 4924 * ibmvfc_resume - Resume from suspend 4925 * @dev: device struct 4926 * 4927 * We may have lost an interrupt across suspend/resume, so kick the 4928 * interrupt handler 4929 * 4930 */ 4931 static int ibmvfc_resume(struct device *dev) 4932 { 4933 unsigned long flags; 4934 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 4935 struct vio_dev *vdev = to_vio_dev(dev); 4936 4937 spin_lock_irqsave(vhost->host->host_lock, flags); 4938 vio_disable_interrupts(vdev); 4939 tasklet_schedule(&vhost->tasklet); 4940 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4941 return 0; 4942 } 4943 4944 /** 4945 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4946 * @vdev: vio device struct 4947 * 4948 * Return value: 4949 * Number of bytes the driver will need to DMA map at the same time in 4950 * order to perform well. 4951 */ 4952 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4953 { 4954 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4955 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4956 } 4957 4958 static struct vio_device_id ibmvfc_device_table[] = { 4959 {"fcp", "IBM,vfc-client"}, 4960 { "", "" } 4961 }; 4962 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4963 4964 static struct dev_pm_ops ibmvfc_pm_ops = { 4965 .resume = ibmvfc_resume 4966 }; 4967 4968 static struct vio_driver ibmvfc_driver = { 4969 .id_table = ibmvfc_device_table, 4970 .probe = ibmvfc_probe, 4971 .remove = ibmvfc_remove, 4972 .get_desired_dma = ibmvfc_get_desired_dma, 4973 .name = IBMVFC_NAME, 4974 .pm = &ibmvfc_pm_ops, 4975 }; 4976 4977 static struct fc_function_template ibmvfc_transport_functions = { 4978 .show_host_fabric_name = 1, 4979 .show_host_node_name = 1, 4980 .show_host_port_name = 1, 4981 .show_host_supported_classes = 1, 4982 .show_host_port_type = 1, 4983 .show_host_port_id = 1, 4984 .show_host_maxframe_size = 1, 4985 4986 .get_host_port_state = ibmvfc_get_host_port_state, 4987 .show_host_port_state = 1, 4988 4989 .get_host_speed = ibmvfc_get_host_speed, 4990 .show_host_speed = 1, 4991 4992 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4993 .terminate_rport_io = ibmvfc_terminate_rport_io, 4994 4995 .show_rport_maxframe_size = 1, 4996 .show_rport_supported_classes = 1, 4997 4998 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4999 .show_rport_dev_loss_tmo = 1, 5000 5001 .get_starget_node_name = ibmvfc_get_starget_node_name, 5002 .show_starget_node_name = 1, 5003 5004 .get_starget_port_name = ibmvfc_get_starget_port_name, 5005 .show_starget_port_name = 1, 5006 5007 .get_starget_port_id = ibmvfc_get_starget_port_id, 5008 .show_starget_port_id = 1, 5009 5010 .bsg_request = ibmvfc_bsg_request, 5011 .bsg_timeout = ibmvfc_bsg_timeout, 5012 }; 5013 5014 /** 5015 * ibmvfc_module_init - Initialize the ibmvfc module 5016 * 5017 * Return value: 5018 * 0 on success / other on failure 5019 **/ 5020 static int __init ibmvfc_module_init(void) 5021 { 5022 int rc; 5023 5024 if (!firmware_has_feature(FW_FEATURE_VIO)) 5025 return -ENODEV; 5026 5027 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 5028 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 5029 5030 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 5031 if (!ibmvfc_transport_template) 5032 return -ENOMEM; 5033 5034 rc = vio_register_driver(&ibmvfc_driver); 5035 if (rc) 5036 fc_release_transport(ibmvfc_transport_template); 5037 return rc; 5038 } 5039 5040 /** 5041 * ibmvfc_module_exit - Teardown the ibmvfc module 5042 * 5043 * Return value: 5044 * nothing 5045 **/ 5046 static void __exit ibmvfc_module_exit(void) 5047 { 5048 vio_unregister_driver(&ibmvfc_driver); 5049 fc_release_transport(ibmvfc_transport_template); 5050 } 5051 5052 module_init(ibmvfc_module_init); 5053 module_exit(ibmvfc_module_exit); 5054