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->state == IBMVFC_ACTIVE) { 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 tmf->flags = (type | IBMVFC_TMF_LUA_VALID); 2194 tmf->cancel_key = (unsigned long)sdev->hostdata; 2195 tmf->my_cancel_key = (unsigned long)starget->hostdata; 2196 2197 evt->sync_iu = &rsp; 2198 init_completion(&evt->comp); 2199 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2200 } 2201 2202 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2203 2204 if (rsp_rc != 0) { 2205 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2206 return -EIO; 2207 } 2208 2209 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2210 2211 wait_for_completion(&evt->comp); 2212 status = rsp.mad_common.status; 2213 spin_lock_irqsave(vhost->host->host_lock, flags); 2214 ibmvfc_free_event(evt); 2215 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2216 2217 if (status != IBMVFC_MAD_SUCCESS) { 2218 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2219 return -EIO; 2220 } 2221 2222 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2223 return 0; 2224 } 2225 2226 /** 2227 * ibmvfc_match_key - Match function for specified cancel key 2228 * @evt: ibmvfc event struct 2229 * @key: cancel key to match 2230 * 2231 * Returns: 2232 * 1 if event matches key / 0 if event does not match key 2233 **/ 2234 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2235 { 2236 unsigned long cancel_key = (unsigned long)key; 2237 2238 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2239 evt->iu.cmd.cancel_key == cancel_key) 2240 return 1; 2241 return 0; 2242 } 2243 2244 /** 2245 * ibmvfc_match_evt - Match function for specified event 2246 * @evt: ibmvfc event struct 2247 * @match: event to match 2248 * 2249 * Returns: 2250 * 1 if event matches key / 0 if event does not match key 2251 **/ 2252 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) 2253 { 2254 if (evt == match) 2255 return 1; 2256 return 0; 2257 } 2258 2259 /** 2260 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2261 * @sdev: scsi device to abort commands 2262 * 2263 * This sends an Abort Task Set to the VIOS for the specified device. This does 2264 * NOT send any cancel to the VIOS. That must be done separately. 2265 * 2266 * Returns: 2267 * 0 on success / other on failure 2268 **/ 2269 static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2270 { 2271 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2272 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2273 struct ibmvfc_cmd *tmf; 2274 struct ibmvfc_event *evt, *found_evt; 2275 union ibmvfc_iu rsp_iu; 2276 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 2277 int rc, rsp_rc = -EBUSY; 2278 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2279 int rsp_code = 0; 2280 2281 spin_lock_irqsave(vhost->host->host_lock, flags); 2282 found_evt = NULL; 2283 list_for_each_entry(evt, &vhost->sent, queue) { 2284 if (evt->cmnd && evt->cmnd->device == sdev) { 2285 found_evt = evt; 2286 break; 2287 } 2288 } 2289 2290 if (!found_evt) { 2291 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2292 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2293 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2294 return 0; 2295 } 2296 2297 if (vhost->state == IBMVFC_ACTIVE) { 2298 evt = ibmvfc_get_event(vhost); 2299 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2300 2301 tmf = &evt->iu.cmd; 2302 memset(tmf, 0, sizeof(*tmf)); 2303 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 2304 tmf->resp.len = sizeof(tmf->rsp); 2305 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 2306 tmf->payload_len = sizeof(tmf->iu); 2307 tmf->resp_len = sizeof(tmf->rsp); 2308 tmf->cancel_key = (unsigned long)sdev->hostdata; 2309 tmf->tgt_scsi_id = rport->port_id; 2310 int_to_scsilun(sdev->lun, &tmf->iu.lun); 2311 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 2312 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 2313 evt->sync_iu = &rsp_iu; 2314 2315 init_completion(&evt->comp); 2316 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2317 } 2318 2319 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2320 2321 if (rsp_rc != 0) { 2322 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2323 return -EIO; 2324 } 2325 2326 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2327 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2328 2329 if (!timeout) { 2330 rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2331 if (!rc) { 2332 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2333 if (rc == SUCCESS) 2334 rc = 0; 2335 } 2336 2337 if (rc) { 2338 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2339 ibmvfc_reset_host(vhost); 2340 rsp_rc = -EIO; 2341 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2342 2343 if (rc == SUCCESS) 2344 rsp_rc = 0; 2345 2346 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); 2347 if (rc != SUCCESS) { 2348 spin_lock_irqsave(vhost->host->host_lock, flags); 2349 ibmvfc_hard_reset_host(vhost); 2350 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2351 rsp_rc = 0; 2352 } 2353 2354 goto out; 2355 } 2356 } 2357 2358 if (rsp_iu.cmd.status) 2359 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2360 2361 if (rsp_code) { 2362 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2363 rsp_code = fc_rsp->data.info.rsp_code; 2364 2365 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2366 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2367 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 2368 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2369 fc_rsp->scsi_status); 2370 rsp_rc = -EIO; 2371 } else 2372 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2373 2374 out: 2375 spin_lock_irqsave(vhost->host->host_lock, flags); 2376 ibmvfc_free_event(evt); 2377 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2378 return rsp_rc; 2379 } 2380 2381 /** 2382 * ibmvfc_eh_abort_handler - Abort a command 2383 * @cmd: scsi command to abort 2384 * 2385 * Returns: 2386 * SUCCESS / FAILED 2387 **/ 2388 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2389 { 2390 struct scsi_device *sdev = cmd->device; 2391 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2392 int cancel_rc, abort_rc; 2393 int rc = FAILED; 2394 2395 ENTER; 2396 fc_block_scsi_eh(cmd); 2397 ibmvfc_wait_while_resetting(vhost); 2398 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2399 abort_rc = ibmvfc_abort_task_set(sdev); 2400 2401 if (!cancel_rc && !abort_rc) 2402 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2403 2404 LEAVE; 2405 return rc; 2406 } 2407 2408 /** 2409 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2410 * @cmd: scsi command struct 2411 * 2412 * Returns: 2413 * SUCCESS / FAILED 2414 **/ 2415 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2416 { 2417 struct scsi_device *sdev = cmd->device; 2418 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2419 int cancel_rc, reset_rc; 2420 int rc = FAILED; 2421 2422 ENTER; 2423 fc_block_scsi_eh(cmd); 2424 ibmvfc_wait_while_resetting(vhost); 2425 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2426 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2427 2428 if (!cancel_rc && !reset_rc) 2429 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2430 2431 LEAVE; 2432 return rc; 2433 } 2434 2435 /** 2436 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2437 * @sdev: scsi device struct 2438 * @data: return code 2439 * 2440 **/ 2441 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2442 { 2443 unsigned long *rc = data; 2444 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2445 } 2446 2447 /** 2448 * ibmvfc_eh_target_reset_handler - Reset the target 2449 * @cmd: scsi command struct 2450 * 2451 * Returns: 2452 * SUCCESS / FAILED 2453 **/ 2454 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2455 { 2456 struct scsi_device *sdev = cmd->device; 2457 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2458 struct scsi_target *starget = scsi_target(sdev); 2459 int reset_rc; 2460 int rc = FAILED; 2461 unsigned long cancel_rc = 0; 2462 2463 ENTER; 2464 fc_block_scsi_eh(cmd); 2465 ibmvfc_wait_while_resetting(vhost); 2466 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2467 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2468 2469 if (!cancel_rc && !reset_rc) 2470 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2471 2472 LEAVE; 2473 return rc; 2474 } 2475 2476 /** 2477 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2478 * @cmd: struct scsi_cmnd having problems 2479 * 2480 **/ 2481 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2482 { 2483 int rc; 2484 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2485 2486 fc_block_scsi_eh(cmd); 2487 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2488 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2489 return rc ? FAILED : SUCCESS; 2490 } 2491 2492 /** 2493 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2494 * @rport: rport struct 2495 * 2496 * Return value: 2497 * none 2498 **/ 2499 static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2500 { 2501 struct Scsi_Host *shost = rport_to_shost(rport); 2502 struct ibmvfc_host *vhost = shost_priv(shost); 2503 struct fc_rport *dev_rport; 2504 struct scsi_device *sdev; 2505 unsigned long rc; 2506 2507 ENTER; 2508 shost_for_each_device(sdev, shost) { 2509 dev_rport = starget_to_rport(scsi_target(sdev)); 2510 if (dev_rport != rport) 2511 continue; 2512 ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2513 ibmvfc_abort_task_set(sdev); 2514 } 2515 2516 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 2517 2518 if (rc == FAILED) 2519 ibmvfc_issue_fc_host_lip(shost); 2520 LEAVE; 2521 } 2522 2523 static const struct ibmvfc_async_desc ae_desc [] = { 2524 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2525 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2526 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2527 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2528 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2529 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, 2530 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, 2531 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, 2532 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, 2533 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, 2534 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, 2535 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, 2536 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, 2537 }; 2538 2539 static const struct ibmvfc_async_desc unknown_ae = { 2540 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL 2541 }; 2542 2543 /** 2544 * ibmvfc_get_ae_desc - Get text description for async event 2545 * @ae: async event 2546 * 2547 **/ 2548 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 2549 { 2550 int i; 2551 2552 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2553 if (ae_desc[i].ae == ae) 2554 return &ae_desc[i]; 2555 2556 return &unknown_ae; 2557 } 2558 2559 static const struct { 2560 enum ibmvfc_ae_link_state state; 2561 const char *desc; 2562 } link_desc [] = { 2563 { IBMVFC_AE_LS_LINK_UP, " link up" }, 2564 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 2565 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 2566 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 2567 }; 2568 2569 /** 2570 * ibmvfc_get_link_state - Get text description for link state 2571 * @state: link state 2572 * 2573 **/ 2574 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 2575 { 2576 int i; 2577 2578 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 2579 if (link_desc[i].state == state) 2580 return link_desc[i].desc; 2581 2582 return ""; 2583 } 2584 2585 /** 2586 * ibmvfc_handle_async - Handle an async event from the adapter 2587 * @crq: crq to process 2588 * @vhost: ibmvfc host struct 2589 * 2590 **/ 2591 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2592 struct ibmvfc_host *vhost) 2593 { 2594 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(crq->event); 2595 struct ibmvfc_target *tgt; 2596 2597 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 2598 " node_name: %llx%s\n", desc->desc, crq->scsi_id, crq->wwpn, crq->node_name, 2599 ibmvfc_get_link_state(crq->link_state)); 2600 2601 switch (crq->event) { 2602 case IBMVFC_AE_RESUME: 2603 switch (crq->link_state) { 2604 case IBMVFC_AE_LS_LINK_DOWN: 2605 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2606 break; 2607 case IBMVFC_AE_LS_LINK_DEAD: 2608 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2609 break; 2610 case IBMVFC_AE_LS_LINK_UP: 2611 case IBMVFC_AE_LS_LINK_BOUNCED: 2612 default: 2613 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2614 vhost->delay_init = 1; 2615 __ibmvfc_reset_host(vhost); 2616 break; 2617 }; 2618 2619 break; 2620 case IBMVFC_AE_LINK_UP: 2621 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2622 vhost->delay_init = 1; 2623 __ibmvfc_reset_host(vhost); 2624 break; 2625 case IBMVFC_AE_SCN_FABRIC: 2626 case IBMVFC_AE_SCN_DOMAIN: 2627 vhost->events_to_log |= IBMVFC_AE_RSCN; 2628 if (vhost->state < IBMVFC_HALTED) { 2629 vhost->delay_init = 1; 2630 __ibmvfc_reset_host(vhost); 2631 } 2632 break; 2633 case IBMVFC_AE_SCN_NPORT: 2634 case IBMVFC_AE_SCN_GROUP: 2635 vhost->events_to_log |= IBMVFC_AE_RSCN; 2636 ibmvfc_reinit_host(vhost); 2637 break; 2638 case IBMVFC_AE_ELS_LOGO: 2639 case IBMVFC_AE_ELS_PRLO: 2640 case IBMVFC_AE_ELS_PLOGI: 2641 list_for_each_entry(tgt, &vhost->targets, queue) { 2642 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 2643 break; 2644 if (crq->scsi_id && tgt->scsi_id != crq->scsi_id) 2645 continue; 2646 if (crq->wwpn && tgt->ids.port_name != crq->wwpn) 2647 continue; 2648 if (crq->node_name && tgt->ids.node_name != crq->node_name) 2649 continue; 2650 if (tgt->need_login && crq->event == IBMVFC_AE_ELS_LOGO) 2651 tgt->logo_rcvd = 1; 2652 if (!tgt->need_login || crq->event == IBMVFC_AE_ELS_PLOGI) { 2653 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2654 ibmvfc_reinit_host(vhost); 2655 } 2656 } 2657 break; 2658 case IBMVFC_AE_LINK_DOWN: 2659 case IBMVFC_AE_ADAPTER_FAILED: 2660 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2661 break; 2662 case IBMVFC_AE_LINK_DEAD: 2663 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2664 break; 2665 case IBMVFC_AE_HALT: 2666 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2667 break; 2668 default: 2669 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2670 break; 2671 }; 2672 } 2673 2674 /** 2675 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2676 * @crq: Command/Response queue 2677 * @vhost: ibmvfc host struct 2678 * 2679 **/ 2680 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2681 { 2682 long rc; 2683 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; 2684 2685 switch (crq->valid) { 2686 case IBMVFC_CRQ_INIT_RSP: 2687 switch (crq->format) { 2688 case IBMVFC_CRQ_INIT: 2689 dev_info(vhost->dev, "Partner initialized\n"); 2690 /* Send back a response */ 2691 rc = ibmvfc_send_crq_init_complete(vhost); 2692 if (rc == 0) 2693 ibmvfc_init_host(vhost); 2694 else 2695 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2696 break; 2697 case IBMVFC_CRQ_INIT_COMPLETE: 2698 dev_info(vhost->dev, "Partner initialization complete\n"); 2699 ibmvfc_init_host(vhost); 2700 break; 2701 default: 2702 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2703 } 2704 return; 2705 case IBMVFC_CRQ_XPORT_EVENT: 2706 vhost->state = IBMVFC_NO_CRQ; 2707 vhost->logged_in = 0; 2708 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2709 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2710 /* We need to re-setup the interpartition connection */ 2711 dev_info(vhost->dev, "Re-enabling adapter\n"); 2712 vhost->client_migrated = 1; 2713 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2714 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2715 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 2716 } else { 2717 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2718 ibmvfc_purge_requests(vhost, DID_ERROR); 2719 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2720 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 2721 } 2722 return; 2723 case IBMVFC_CRQ_CMD_RSP: 2724 break; 2725 default: 2726 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2727 return; 2728 } 2729 2730 if (crq->format == IBMVFC_ASYNC_EVENT) 2731 return; 2732 2733 /* The only kind of payload CRQs we should get are responses to 2734 * things we send. Make sure this response is to something we 2735 * actually sent 2736 */ 2737 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2738 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2739 crq->ioba); 2740 return; 2741 } 2742 2743 if (unlikely(atomic_read(&evt->free))) { 2744 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2745 crq->ioba); 2746 return; 2747 } 2748 2749 del_timer(&evt->timer); 2750 list_del(&evt->queue); 2751 ibmvfc_trc_end(evt); 2752 evt->done(evt); 2753 } 2754 2755 /** 2756 * ibmvfc_scan_finished - Check if the device scan is done. 2757 * @shost: scsi host struct 2758 * @time: current elapsed time 2759 * 2760 * Returns: 2761 * 0 if scan is not done / 1 if scan is done 2762 **/ 2763 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2764 { 2765 unsigned long flags; 2766 struct ibmvfc_host *vhost = shost_priv(shost); 2767 int done = 0; 2768 2769 spin_lock_irqsave(shost->host_lock, flags); 2770 if (time >= (init_timeout * HZ)) { 2771 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2772 "continuing initialization\n", init_timeout); 2773 done = 1; 2774 } 2775 2776 if (vhost->scan_complete) 2777 done = 1; 2778 spin_unlock_irqrestore(shost->host_lock, flags); 2779 return done; 2780 } 2781 2782 /** 2783 * ibmvfc_slave_alloc - Setup the device's task set value 2784 * @sdev: struct scsi_device device to configure 2785 * 2786 * Set the device's task set value so that error handling works as 2787 * expected. 2788 * 2789 * Returns: 2790 * 0 on success / -ENXIO if device does not exist 2791 **/ 2792 static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2793 { 2794 struct Scsi_Host *shost = sdev->host; 2795 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2796 struct ibmvfc_host *vhost = shost_priv(shost); 2797 unsigned long flags = 0; 2798 2799 if (!rport || fc_remote_port_chkready(rport)) 2800 return -ENXIO; 2801 2802 spin_lock_irqsave(shost->host_lock, flags); 2803 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2804 spin_unlock_irqrestore(shost->host_lock, flags); 2805 return 0; 2806 } 2807 2808 /** 2809 * ibmvfc_target_alloc - Setup the target's task set value 2810 * @starget: struct scsi_target 2811 * 2812 * Set the target's task set value so that error handling works as 2813 * expected. 2814 * 2815 * Returns: 2816 * 0 on success / -ENXIO if device does not exist 2817 **/ 2818 static int ibmvfc_target_alloc(struct scsi_target *starget) 2819 { 2820 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2821 struct ibmvfc_host *vhost = shost_priv(shost); 2822 unsigned long flags = 0; 2823 2824 spin_lock_irqsave(shost->host_lock, flags); 2825 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2826 spin_unlock_irqrestore(shost->host_lock, flags); 2827 return 0; 2828 } 2829 2830 /** 2831 * ibmvfc_slave_configure - Configure the device 2832 * @sdev: struct scsi_device device to configure 2833 * 2834 * Enable allow_restart for a device if it is a disk. Adjust the 2835 * queue_depth here also. 2836 * 2837 * Returns: 2838 * 0 2839 **/ 2840 static int ibmvfc_slave_configure(struct scsi_device *sdev) 2841 { 2842 struct Scsi_Host *shost = sdev->host; 2843 unsigned long flags = 0; 2844 2845 spin_lock_irqsave(shost->host_lock, flags); 2846 if (sdev->type == TYPE_DISK) 2847 sdev->allow_restart = 1; 2848 2849 if (sdev->tagged_supported) { 2850 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 2851 scsi_activate_tcq(sdev, sdev->queue_depth); 2852 } else 2853 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2854 spin_unlock_irqrestore(shost->host_lock, flags); 2855 return 0; 2856 } 2857 2858 /** 2859 * ibmvfc_change_queue_depth - Change the device's queue depth 2860 * @sdev: scsi device struct 2861 * @qdepth: depth to set 2862 * @reason: calling context 2863 * 2864 * Return value: 2865 * actual depth set 2866 **/ 2867 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth, 2868 int reason) 2869 { 2870 if (reason != SCSI_QDEPTH_DEFAULT) 2871 return -EOPNOTSUPP; 2872 2873 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2874 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2875 2876 scsi_adjust_queue_depth(sdev, 0, qdepth); 2877 return sdev->queue_depth; 2878 } 2879 2880 /** 2881 * ibmvfc_change_queue_type - Change the device's queue type 2882 * @sdev: scsi device struct 2883 * @tag_type: type of tags to use 2884 * 2885 * Return value: 2886 * actual queue type set 2887 **/ 2888 static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) 2889 { 2890 if (sdev->tagged_supported) { 2891 scsi_set_tag_type(sdev, tag_type); 2892 2893 if (tag_type) 2894 scsi_activate_tcq(sdev, sdev->queue_depth); 2895 else 2896 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2897 } else 2898 tag_type = 0; 2899 2900 return tag_type; 2901 } 2902 2903 static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2904 struct device_attribute *attr, char *buf) 2905 { 2906 struct Scsi_Host *shost = class_to_shost(dev); 2907 struct ibmvfc_host *vhost = shost_priv(shost); 2908 2909 return snprintf(buf, PAGE_SIZE, "%s\n", 2910 vhost->login_buf->resp.partition_name); 2911 } 2912 2913 static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2914 struct device_attribute *attr, char *buf) 2915 { 2916 struct Scsi_Host *shost = class_to_shost(dev); 2917 struct ibmvfc_host *vhost = shost_priv(shost); 2918 2919 return snprintf(buf, PAGE_SIZE, "%s\n", 2920 vhost->login_buf->resp.device_name); 2921 } 2922 2923 static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2924 struct device_attribute *attr, char *buf) 2925 { 2926 struct Scsi_Host *shost = class_to_shost(dev); 2927 struct ibmvfc_host *vhost = shost_priv(shost); 2928 2929 return snprintf(buf, PAGE_SIZE, "%s\n", 2930 vhost->login_buf->resp.port_loc_code); 2931 } 2932 2933 static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2934 struct device_attribute *attr, char *buf) 2935 { 2936 struct Scsi_Host *shost = class_to_shost(dev); 2937 struct ibmvfc_host *vhost = shost_priv(shost); 2938 2939 return snprintf(buf, PAGE_SIZE, "%s\n", 2940 vhost->login_buf->resp.drc_name); 2941 } 2942 2943 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2944 struct device_attribute *attr, char *buf) 2945 { 2946 struct Scsi_Host *shost = class_to_shost(dev); 2947 struct ibmvfc_host *vhost = shost_priv(shost); 2948 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2949 } 2950 2951 static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 2952 struct device_attribute *attr, char *buf) 2953 { 2954 struct Scsi_Host *shost = class_to_shost(dev); 2955 struct ibmvfc_host *vhost = shost_priv(shost); 2956 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); 2957 } 2958 2959 /** 2960 * ibmvfc_show_log_level - Show the adapter's error logging level 2961 * @dev: class device struct 2962 * @buf: buffer 2963 * 2964 * Return value: 2965 * number of bytes printed to buffer 2966 **/ 2967 static ssize_t ibmvfc_show_log_level(struct device *dev, 2968 struct device_attribute *attr, char *buf) 2969 { 2970 struct Scsi_Host *shost = class_to_shost(dev); 2971 struct ibmvfc_host *vhost = shost_priv(shost); 2972 unsigned long flags = 0; 2973 int len; 2974 2975 spin_lock_irqsave(shost->host_lock, flags); 2976 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2977 spin_unlock_irqrestore(shost->host_lock, flags); 2978 return len; 2979 } 2980 2981 /** 2982 * ibmvfc_store_log_level - Change the adapter's error logging level 2983 * @dev: class device struct 2984 * @buf: buffer 2985 * 2986 * Return value: 2987 * number of bytes printed to buffer 2988 **/ 2989 static ssize_t ibmvfc_store_log_level(struct device *dev, 2990 struct device_attribute *attr, 2991 const char *buf, size_t count) 2992 { 2993 struct Scsi_Host *shost = class_to_shost(dev); 2994 struct ibmvfc_host *vhost = shost_priv(shost); 2995 unsigned long flags = 0; 2996 2997 spin_lock_irqsave(shost->host_lock, flags); 2998 vhost->log_level = simple_strtoul(buf, NULL, 10); 2999 spin_unlock_irqrestore(shost->host_lock, flags); 3000 return strlen(buf); 3001 } 3002 3003 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 3004 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 3005 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 3006 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 3007 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 3008 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 3009 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 3010 ibmvfc_show_log_level, ibmvfc_store_log_level); 3011 3012 #ifdef CONFIG_SCSI_IBMVFC_TRACE 3013 /** 3014 * ibmvfc_read_trace - Dump the adapter trace 3015 * @filp: open sysfs file 3016 * @kobj: kobject struct 3017 * @bin_attr: bin_attribute struct 3018 * @buf: buffer 3019 * @off: offset 3020 * @count: buffer size 3021 * 3022 * Return value: 3023 * number of bytes printed to buffer 3024 **/ 3025 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 3026 struct bin_attribute *bin_attr, 3027 char *buf, loff_t off, size_t count) 3028 { 3029 struct device *dev = container_of(kobj, struct device, kobj); 3030 struct Scsi_Host *shost = class_to_shost(dev); 3031 struct ibmvfc_host *vhost = shost_priv(shost); 3032 unsigned long flags = 0; 3033 int size = IBMVFC_TRACE_SIZE; 3034 char *src = (char *)vhost->trace; 3035 3036 if (off > size) 3037 return 0; 3038 if (off + count > size) { 3039 size -= off; 3040 count = size; 3041 } 3042 3043 spin_lock_irqsave(shost->host_lock, flags); 3044 memcpy(buf, &src[off], count); 3045 spin_unlock_irqrestore(shost->host_lock, flags); 3046 return count; 3047 } 3048 3049 static struct bin_attribute ibmvfc_trace_attr = { 3050 .attr = { 3051 .name = "trace", 3052 .mode = S_IRUGO, 3053 }, 3054 .size = 0, 3055 .read = ibmvfc_read_trace, 3056 }; 3057 #endif 3058 3059 static struct device_attribute *ibmvfc_attrs[] = { 3060 &dev_attr_partition_name, 3061 &dev_attr_device_name, 3062 &dev_attr_port_loc_code, 3063 &dev_attr_drc_name, 3064 &dev_attr_npiv_version, 3065 &dev_attr_capabilities, 3066 &dev_attr_log_level, 3067 NULL 3068 }; 3069 3070 static struct scsi_host_template driver_template = { 3071 .module = THIS_MODULE, 3072 .name = "IBM POWER Virtual FC Adapter", 3073 .proc_name = IBMVFC_NAME, 3074 .queuecommand = ibmvfc_queuecommand, 3075 .eh_abort_handler = ibmvfc_eh_abort_handler, 3076 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3077 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3078 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3079 .slave_alloc = ibmvfc_slave_alloc, 3080 .slave_configure = ibmvfc_slave_configure, 3081 .target_alloc = ibmvfc_target_alloc, 3082 .scan_finished = ibmvfc_scan_finished, 3083 .change_queue_depth = ibmvfc_change_queue_depth, 3084 .change_queue_type = ibmvfc_change_queue_type, 3085 .cmd_per_lun = 16, 3086 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3087 .this_id = -1, 3088 .sg_tablesize = SG_ALL, 3089 .max_sectors = IBMVFC_MAX_SECTORS, 3090 .use_clustering = ENABLE_CLUSTERING, 3091 .shost_attrs = ibmvfc_attrs, 3092 }; 3093 3094 /** 3095 * ibmvfc_next_async_crq - Returns the next entry in async queue 3096 * @vhost: ibmvfc host struct 3097 * 3098 * Returns: 3099 * Pointer to next entry in queue / NULL if empty 3100 **/ 3101 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3102 { 3103 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 3104 struct ibmvfc_async_crq *crq; 3105 3106 crq = &async_crq->msgs[async_crq->cur]; 3107 if (crq->valid & 0x80) { 3108 if (++async_crq->cur == async_crq->size) 3109 async_crq->cur = 0; 3110 rmb(); 3111 } else 3112 crq = NULL; 3113 3114 return crq; 3115 } 3116 3117 /** 3118 * ibmvfc_next_crq - Returns the next entry in message queue 3119 * @vhost: ibmvfc host struct 3120 * 3121 * Returns: 3122 * Pointer to next entry in queue / NULL if empty 3123 **/ 3124 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3125 { 3126 struct ibmvfc_crq_queue *queue = &vhost->crq; 3127 struct ibmvfc_crq *crq; 3128 3129 crq = &queue->msgs[queue->cur]; 3130 if (crq->valid & 0x80) { 3131 if (++queue->cur == queue->size) 3132 queue->cur = 0; 3133 rmb(); 3134 } else 3135 crq = NULL; 3136 3137 return crq; 3138 } 3139 3140 /** 3141 * ibmvfc_interrupt - Interrupt handler 3142 * @irq: number of irq to handle, not used 3143 * @dev_instance: ibmvfc_host that received interrupt 3144 * 3145 * Returns: 3146 * IRQ_HANDLED 3147 **/ 3148 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3149 { 3150 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3151 unsigned long flags; 3152 3153 spin_lock_irqsave(vhost->host->host_lock, flags); 3154 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3155 tasklet_schedule(&vhost->tasklet); 3156 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3157 return IRQ_HANDLED; 3158 } 3159 3160 /** 3161 * ibmvfc_tasklet - Interrupt handler tasklet 3162 * @data: ibmvfc host struct 3163 * 3164 * Returns: 3165 * Nothing 3166 **/ 3167 static void ibmvfc_tasklet(void *data) 3168 { 3169 struct ibmvfc_host *vhost = data; 3170 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3171 struct ibmvfc_crq *crq; 3172 struct ibmvfc_async_crq *async; 3173 unsigned long flags; 3174 int done = 0; 3175 3176 spin_lock_irqsave(vhost->host->host_lock, flags); 3177 while (!done) { 3178 /* Pull all the valid messages off the async CRQ */ 3179 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3180 ibmvfc_handle_async(async, vhost); 3181 async->valid = 0; 3182 wmb(); 3183 } 3184 3185 /* Pull all the valid messages off the CRQ */ 3186 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3187 ibmvfc_handle_crq(crq, vhost); 3188 crq->valid = 0; 3189 wmb(); 3190 } 3191 3192 vio_enable_interrupts(vdev); 3193 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3194 vio_disable_interrupts(vdev); 3195 ibmvfc_handle_async(async, vhost); 3196 async->valid = 0; 3197 wmb(); 3198 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3199 vio_disable_interrupts(vdev); 3200 ibmvfc_handle_crq(crq, vhost); 3201 crq->valid = 0; 3202 wmb(); 3203 } else 3204 done = 1; 3205 } 3206 3207 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3208 } 3209 3210 /** 3211 * ibmvfc_init_tgt - Set the next init job step for the target 3212 * @tgt: ibmvfc target struct 3213 * @job_step: job step to perform 3214 * 3215 **/ 3216 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3217 void (*job_step) (struct ibmvfc_target *)) 3218 { 3219 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 3220 tgt->job_step = job_step; 3221 wake_up(&tgt->vhost->work_wait_q); 3222 } 3223 3224 /** 3225 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3226 * @tgt: ibmvfc target struct 3227 * @job_step: initialization job step 3228 * 3229 * Returns: 1 if step will be retried / 0 if not 3230 * 3231 **/ 3232 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3233 void (*job_step) (struct ibmvfc_target *)) 3234 { 3235 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3236 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3237 wake_up(&tgt->vhost->work_wait_q); 3238 return 0; 3239 } else 3240 ibmvfc_init_tgt(tgt, job_step); 3241 return 1; 3242 } 3243 3244 /* Defined in FC-LS */ 3245 static const struct { 3246 int code; 3247 int retry; 3248 int logged_in; 3249 } prli_rsp [] = { 3250 { 0, 1, 0 }, 3251 { 1, 0, 1 }, 3252 { 2, 1, 0 }, 3253 { 3, 1, 0 }, 3254 { 4, 0, 0 }, 3255 { 5, 0, 0 }, 3256 { 6, 0, 1 }, 3257 { 7, 0, 0 }, 3258 { 8, 1, 0 }, 3259 }; 3260 3261 /** 3262 * ibmvfc_get_prli_rsp - Find PRLI response index 3263 * @flags: PRLI response flags 3264 * 3265 **/ 3266 static int ibmvfc_get_prli_rsp(u16 flags) 3267 { 3268 int i; 3269 int code = (flags & 0x0f00) >> 8; 3270 3271 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3272 if (prli_rsp[i].code == code) 3273 return i; 3274 3275 return 0; 3276 } 3277 3278 /** 3279 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3280 * @evt: ibmvfc event struct 3281 * 3282 **/ 3283 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3284 { 3285 struct ibmvfc_target *tgt = evt->tgt; 3286 struct ibmvfc_host *vhost = evt->vhost; 3287 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3288 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3289 u32 status = rsp->common.status; 3290 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3291 3292 vhost->discovery_threads--; 3293 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3294 switch (status) { 3295 case IBMVFC_MAD_SUCCESS: 3296 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3297 parms->type, parms->flags, parms->service_parms); 3298 3299 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3300 index = ibmvfc_get_prli_rsp(parms->flags); 3301 if (prli_rsp[index].logged_in) { 3302 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) { 3303 tgt->need_login = 0; 3304 tgt->ids.roles = 0; 3305 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC) 3306 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3307 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC) 3308 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3309 tgt->add_rport = 1; 3310 } else 3311 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3312 } else if (prli_rsp[index].retry) 3313 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3314 else 3315 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3316 } else 3317 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3318 break; 3319 case IBMVFC_MAD_DRIVER_FAILED: 3320 break; 3321 case IBMVFC_MAD_CRQ_ERROR: 3322 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3323 break; 3324 case IBMVFC_MAD_FAILED: 3325 default: 3326 if ((rsp->status & IBMVFC_VIOS_FAILURE) && rsp->error == IBMVFC_PLOGI_REQUIRED) 3327 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3328 else if (tgt->logo_rcvd) 3329 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3330 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3331 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3332 else 3333 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3334 3335 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3336 ibmvfc_get_cmd_error(rsp->status, rsp->error), 3337 rsp->status, rsp->error, status); 3338 break; 3339 }; 3340 3341 kref_put(&tgt->kref, ibmvfc_release_tgt); 3342 ibmvfc_free_event(evt); 3343 wake_up(&vhost->work_wait_q); 3344 } 3345 3346 /** 3347 * ibmvfc_tgt_send_prli - Send a process login 3348 * @tgt: ibmvfc target struct 3349 * 3350 **/ 3351 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3352 { 3353 struct ibmvfc_process_login *prli; 3354 struct ibmvfc_host *vhost = tgt->vhost; 3355 struct ibmvfc_event *evt; 3356 3357 if (vhost->discovery_threads >= disc_threads) 3358 return; 3359 3360 kref_get(&tgt->kref); 3361 evt = ibmvfc_get_event(vhost); 3362 vhost->discovery_threads++; 3363 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 3364 evt->tgt = tgt; 3365 prli = &evt->iu.prli; 3366 memset(prli, 0, sizeof(*prli)); 3367 prli->common.version = 1; 3368 prli->common.opcode = IBMVFC_PROCESS_LOGIN; 3369 prli->common.length = sizeof(*prli); 3370 prli->scsi_id = tgt->scsi_id; 3371 3372 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 3373 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; 3374 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; 3375 3376 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3377 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3378 vhost->discovery_threads--; 3379 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3380 kref_put(&tgt->kref, ibmvfc_release_tgt); 3381 } else 3382 tgt_dbg(tgt, "Sent process login\n"); 3383 } 3384 3385 /** 3386 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 3387 * @evt: ibmvfc event struct 3388 * 3389 **/ 3390 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 3391 { 3392 struct ibmvfc_target *tgt = evt->tgt; 3393 struct ibmvfc_host *vhost = evt->vhost; 3394 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 3395 u32 status = rsp->common.status; 3396 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3397 3398 vhost->discovery_threads--; 3399 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3400 switch (status) { 3401 case IBMVFC_MAD_SUCCESS: 3402 tgt_dbg(tgt, "Port Login succeeded\n"); 3403 if (tgt->ids.port_name && 3404 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 3405 vhost->reinit = 1; 3406 tgt_dbg(tgt, "Port re-init required\n"); 3407 break; 3408 } 3409 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3410 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3411 tgt->ids.port_id = tgt->scsi_id; 3412 memcpy(&tgt->service_parms, &rsp->service_parms, 3413 sizeof(tgt->service_parms)); 3414 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3415 sizeof(tgt->service_parms_change)); 3416 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3417 break; 3418 case IBMVFC_MAD_DRIVER_FAILED: 3419 break; 3420 case IBMVFC_MAD_CRQ_ERROR: 3421 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3422 break; 3423 case IBMVFC_MAD_FAILED: 3424 default: 3425 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3426 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3427 else 3428 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3429 3430 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3431 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3432 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3433 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); 3434 break; 3435 }; 3436 3437 kref_put(&tgt->kref, ibmvfc_release_tgt); 3438 ibmvfc_free_event(evt); 3439 wake_up(&vhost->work_wait_q); 3440 } 3441 3442 /** 3443 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3444 * @tgt: ibmvfc target struct 3445 * 3446 **/ 3447 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3448 { 3449 struct ibmvfc_port_login *plogi; 3450 struct ibmvfc_host *vhost = tgt->vhost; 3451 struct ibmvfc_event *evt; 3452 3453 if (vhost->discovery_threads >= disc_threads) 3454 return; 3455 3456 kref_get(&tgt->kref); 3457 tgt->logo_rcvd = 0; 3458 evt = ibmvfc_get_event(vhost); 3459 vhost->discovery_threads++; 3460 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3461 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3462 evt->tgt = tgt; 3463 plogi = &evt->iu.plogi; 3464 memset(plogi, 0, sizeof(*plogi)); 3465 plogi->common.version = 1; 3466 plogi->common.opcode = IBMVFC_PORT_LOGIN; 3467 plogi->common.length = sizeof(*plogi); 3468 plogi->scsi_id = tgt->scsi_id; 3469 3470 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3471 vhost->discovery_threads--; 3472 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3473 kref_put(&tgt->kref, ibmvfc_release_tgt); 3474 } else 3475 tgt_dbg(tgt, "Sent port login\n"); 3476 } 3477 3478 /** 3479 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3480 * @evt: ibmvfc event struct 3481 * 3482 **/ 3483 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3484 { 3485 struct ibmvfc_target *tgt = evt->tgt; 3486 struct ibmvfc_host *vhost = evt->vhost; 3487 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3488 u32 status = rsp->common.status; 3489 3490 vhost->discovery_threads--; 3491 ibmvfc_free_event(evt); 3492 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3493 3494 switch (status) { 3495 case IBMVFC_MAD_SUCCESS: 3496 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3497 break; 3498 case IBMVFC_MAD_DRIVER_FAILED: 3499 kref_put(&tgt->kref, ibmvfc_release_tgt); 3500 wake_up(&vhost->work_wait_q); 3501 return; 3502 case IBMVFC_MAD_FAILED: 3503 default: 3504 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3505 break; 3506 }; 3507 3508 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3509 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3510 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3511 tgt->scsi_id != tgt->new_scsi_id) 3512 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3513 kref_put(&tgt->kref, ibmvfc_release_tgt); 3514 wake_up(&vhost->work_wait_q); 3515 } 3516 3517 /** 3518 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3519 * @tgt: ibmvfc target struct 3520 * 3521 **/ 3522 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3523 { 3524 struct ibmvfc_implicit_logout *mad; 3525 struct ibmvfc_host *vhost = tgt->vhost; 3526 struct ibmvfc_event *evt; 3527 3528 if (vhost->discovery_threads >= disc_threads) 3529 return; 3530 3531 kref_get(&tgt->kref); 3532 evt = ibmvfc_get_event(vhost); 3533 vhost->discovery_threads++; 3534 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3535 evt->tgt = tgt; 3536 mad = &evt->iu.implicit_logout; 3537 memset(mad, 0, sizeof(*mad)); 3538 mad->common.version = 1; 3539 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; 3540 mad->common.length = sizeof(*mad); 3541 mad->old_scsi_id = tgt->scsi_id; 3542 3543 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3544 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3545 vhost->discovery_threads--; 3546 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3547 kref_put(&tgt->kref, ibmvfc_release_tgt); 3548 } else 3549 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3550 } 3551 3552 /** 3553 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3554 * @mad: ibmvfc passthru mad struct 3555 * @tgt: ibmvfc target struct 3556 * 3557 * Returns: 3558 * 1 if PLOGI needed / 0 if PLOGI not needed 3559 **/ 3560 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3561 struct ibmvfc_target *tgt) 3562 { 3563 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3564 sizeof(tgt->ids.port_name))) 3565 return 1; 3566 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3567 sizeof(tgt->ids.node_name))) 3568 return 1; 3569 if (mad->fc_iu.response[6] != tgt->scsi_id) 3570 return 1; 3571 return 0; 3572 } 3573 3574 /** 3575 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3576 * @evt: ibmvfc event struct 3577 * 3578 **/ 3579 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3580 { 3581 struct ibmvfc_target *tgt = evt->tgt; 3582 struct ibmvfc_host *vhost = evt->vhost; 3583 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3584 u32 status = mad->common.status; 3585 u8 fc_reason, fc_explain; 3586 3587 vhost->discovery_threads--; 3588 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3589 del_timer(&tgt->timer); 3590 3591 switch (status) { 3592 case IBMVFC_MAD_SUCCESS: 3593 tgt_dbg(tgt, "ADISC succeeded\n"); 3594 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3595 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3596 break; 3597 case IBMVFC_MAD_DRIVER_FAILED: 3598 break; 3599 case IBMVFC_MAD_FAILED: 3600 default: 3601 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3602 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; 3603 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; 3604 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3605 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), 3606 mad->iu.status, mad->iu.error, 3607 ibmvfc_get_fc_type(fc_reason), fc_reason, 3608 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3609 break; 3610 }; 3611 3612 kref_put(&tgt->kref, ibmvfc_release_tgt); 3613 ibmvfc_free_event(evt); 3614 wake_up(&vhost->work_wait_q); 3615 } 3616 3617 /** 3618 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3619 * @evt: ibmvfc event struct 3620 * 3621 **/ 3622 static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3623 { 3624 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3625 3626 memset(mad, 0, sizeof(*mad)); 3627 mad->common.version = 1; 3628 mad->common.opcode = IBMVFC_PASSTHRU; 3629 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 3630 mad->cmd_ioba.va = (u64)evt->crq.ioba + 3631 offsetof(struct ibmvfc_passthru_mad, iu); 3632 mad->cmd_ioba.len = sizeof(mad->iu); 3633 mad->iu.cmd_len = sizeof(mad->fc_iu.payload); 3634 mad->iu.rsp_len = sizeof(mad->fc_iu.response); 3635 mad->iu.cmd.va = (u64)evt->crq.ioba + 3636 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3637 offsetof(struct ibmvfc_passthru_fc_iu, payload); 3638 mad->iu.cmd.len = sizeof(mad->fc_iu.payload); 3639 mad->iu.rsp.va = (u64)evt->crq.ioba + 3640 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3641 offsetof(struct ibmvfc_passthru_fc_iu, response); 3642 mad->iu.rsp.len = sizeof(mad->fc_iu.response); 3643 } 3644 3645 /** 3646 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3647 * @evt: ibmvfc event struct 3648 * 3649 * Just cleanup this event struct. Everything else is handled by 3650 * the ADISC completion handler. If the ADISC never actually comes 3651 * back, we still have the timer running on the ADISC event struct 3652 * which will fire and cause the CRQ to get reset. 3653 * 3654 **/ 3655 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3656 { 3657 struct ibmvfc_host *vhost = evt->vhost; 3658 struct ibmvfc_target *tgt = evt->tgt; 3659 3660 tgt_dbg(tgt, "ADISC cancel complete\n"); 3661 vhost->abort_threads--; 3662 ibmvfc_free_event(evt); 3663 kref_put(&tgt->kref, ibmvfc_release_tgt); 3664 wake_up(&vhost->work_wait_q); 3665 } 3666 3667 /** 3668 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3669 * @tgt: ibmvfc target struct 3670 * 3671 * If an ADISC times out, send a cancel. If the cancel times 3672 * out, reset the CRQ. When the ADISC comes back as cancelled, 3673 * log back into the target. 3674 **/ 3675 static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) 3676 { 3677 struct ibmvfc_host *vhost = tgt->vhost; 3678 struct ibmvfc_event *evt; 3679 struct ibmvfc_tmf *tmf; 3680 unsigned long flags; 3681 int rc; 3682 3683 tgt_dbg(tgt, "ADISC timeout\n"); 3684 spin_lock_irqsave(vhost->host->host_lock, flags); 3685 if (vhost->abort_threads >= disc_threads || 3686 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3687 vhost->state != IBMVFC_INITIALIZING || 3688 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3689 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3690 return; 3691 } 3692 3693 vhost->abort_threads++; 3694 kref_get(&tgt->kref); 3695 evt = ibmvfc_get_event(vhost); 3696 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3697 3698 evt->tgt = tgt; 3699 tmf = &evt->iu.tmf; 3700 memset(tmf, 0, sizeof(*tmf)); 3701 tmf->common.version = 1; 3702 tmf->common.opcode = IBMVFC_TMF_MAD; 3703 tmf->common.length = sizeof(*tmf); 3704 tmf->scsi_id = tgt->scsi_id; 3705 tmf->cancel_key = tgt->cancel_key; 3706 3707 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3708 3709 if (rc) { 3710 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3711 vhost->abort_threads--; 3712 kref_put(&tgt->kref, ibmvfc_release_tgt); 3713 __ibmvfc_reset_host(vhost); 3714 } else 3715 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3716 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3717 } 3718 3719 /** 3720 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3721 * @tgt: ibmvfc target struct 3722 * 3723 * When sending an ADISC we end up with two timers running. The 3724 * first timer is the timer in the ibmvfc target struct. If this 3725 * fires, we send a cancel to the target. The second timer is the 3726 * timer on the ibmvfc event for the ADISC, which is longer. If that 3727 * fires, it means the ADISC timed out and our attempt to cancel it 3728 * also failed, so we need to reset the CRQ. 3729 **/ 3730 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3731 { 3732 struct ibmvfc_passthru_mad *mad; 3733 struct ibmvfc_host *vhost = tgt->vhost; 3734 struct ibmvfc_event *evt; 3735 3736 if (vhost->discovery_threads >= disc_threads) 3737 return; 3738 3739 kref_get(&tgt->kref); 3740 evt = ibmvfc_get_event(vhost); 3741 vhost->discovery_threads++; 3742 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3743 evt->tgt = tgt; 3744 3745 ibmvfc_init_passthru(evt); 3746 mad = &evt->iu.passthru; 3747 mad->iu.flags = IBMVFC_FC_ELS; 3748 mad->iu.scsi_id = tgt->scsi_id; 3749 mad->iu.cancel_key = tgt->cancel_key; 3750 3751 mad->fc_iu.payload[0] = IBMVFC_ADISC; 3752 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3753 sizeof(vhost->login_buf->resp.port_name)); 3754 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3755 sizeof(vhost->login_buf->resp.node_name)); 3756 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; 3757 3758 if (timer_pending(&tgt->timer)) 3759 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3760 else { 3761 tgt->timer.data = (unsigned long) tgt; 3762 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3763 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; 3764 add_timer(&tgt->timer); 3765 } 3766 3767 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3768 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3769 vhost->discovery_threads--; 3770 del_timer(&tgt->timer); 3771 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3772 kref_put(&tgt->kref, ibmvfc_release_tgt); 3773 } else 3774 tgt_dbg(tgt, "Sent ADISC\n"); 3775 } 3776 3777 /** 3778 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3779 * @evt: ibmvfc event struct 3780 * 3781 **/ 3782 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3783 { 3784 struct ibmvfc_target *tgt = evt->tgt; 3785 struct ibmvfc_host *vhost = evt->vhost; 3786 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3787 u32 status = rsp->common.status; 3788 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3789 3790 vhost->discovery_threads--; 3791 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3792 switch (status) { 3793 case IBMVFC_MAD_SUCCESS: 3794 tgt_dbg(tgt, "Query Target succeeded\n"); 3795 tgt->new_scsi_id = rsp->scsi_id; 3796 if (rsp->scsi_id != tgt->scsi_id) 3797 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3798 else 3799 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3800 break; 3801 case IBMVFC_MAD_DRIVER_FAILED: 3802 break; 3803 case IBMVFC_MAD_CRQ_ERROR: 3804 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3805 break; 3806 case IBMVFC_MAD_FAILED: 3807 default: 3808 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3809 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && 3810 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) 3811 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3812 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3813 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3814 else 3815 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3816 3817 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3818 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3819 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3820 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); 3821 break; 3822 }; 3823 3824 kref_put(&tgt->kref, ibmvfc_release_tgt); 3825 ibmvfc_free_event(evt); 3826 wake_up(&vhost->work_wait_q); 3827 } 3828 3829 /** 3830 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3831 * @tgt: ibmvfc target struct 3832 * 3833 **/ 3834 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3835 { 3836 struct ibmvfc_query_tgt *query_tgt; 3837 struct ibmvfc_host *vhost = tgt->vhost; 3838 struct ibmvfc_event *evt; 3839 3840 if (vhost->discovery_threads >= disc_threads) 3841 return; 3842 3843 kref_get(&tgt->kref); 3844 evt = ibmvfc_get_event(vhost); 3845 vhost->discovery_threads++; 3846 evt->tgt = tgt; 3847 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3848 query_tgt = &evt->iu.query_tgt; 3849 memset(query_tgt, 0, sizeof(*query_tgt)); 3850 query_tgt->common.version = 1; 3851 query_tgt->common.opcode = IBMVFC_QUERY_TARGET; 3852 query_tgt->common.length = sizeof(*query_tgt); 3853 query_tgt->wwpn = tgt->ids.port_name; 3854 3855 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3856 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3857 vhost->discovery_threads--; 3858 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3859 kref_put(&tgt->kref, ibmvfc_release_tgt); 3860 } else 3861 tgt_dbg(tgt, "Sent Query Target\n"); 3862 } 3863 3864 /** 3865 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3866 * @vhost: ibmvfc host struct 3867 * @scsi_id: SCSI ID to allocate target for 3868 * 3869 * Returns: 3870 * 0 on success / other on failure 3871 **/ 3872 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3873 { 3874 struct ibmvfc_target *tgt; 3875 unsigned long flags; 3876 3877 spin_lock_irqsave(vhost->host->host_lock, flags); 3878 list_for_each_entry(tgt, &vhost->targets, queue) { 3879 if (tgt->scsi_id == scsi_id) { 3880 if (tgt->need_login) 3881 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3882 goto unlock_out; 3883 } 3884 } 3885 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3886 3887 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3888 if (!tgt) { 3889 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", 3890 scsi_id); 3891 return -ENOMEM; 3892 } 3893 3894 memset(tgt, 0, sizeof(*tgt)); 3895 tgt->scsi_id = scsi_id; 3896 tgt->new_scsi_id = scsi_id; 3897 tgt->vhost = vhost; 3898 tgt->need_login = 1; 3899 tgt->cancel_key = vhost->task_set++; 3900 init_timer(&tgt->timer); 3901 kref_init(&tgt->kref); 3902 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3903 spin_lock_irqsave(vhost->host->host_lock, flags); 3904 list_add_tail(&tgt->queue, &vhost->targets); 3905 3906 unlock_out: 3907 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3908 return 0; 3909 } 3910 3911 /** 3912 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3913 * @vhost: ibmvfc host struct 3914 * 3915 * Returns: 3916 * 0 on success / other on failure 3917 **/ 3918 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3919 { 3920 int i, rc; 3921 3922 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3923 rc = ibmvfc_alloc_target(vhost, 3924 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); 3925 3926 return rc; 3927 } 3928 3929 /** 3930 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3931 * @evt: ibmvfc event struct 3932 * 3933 **/ 3934 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3935 { 3936 struct ibmvfc_host *vhost = evt->vhost; 3937 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3938 u32 mad_status = rsp->common.status; 3939 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3940 3941 switch (mad_status) { 3942 case IBMVFC_MAD_SUCCESS: 3943 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3944 vhost->num_targets = rsp->num_written; 3945 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3946 break; 3947 case IBMVFC_MAD_FAILED: 3948 level += ibmvfc_retry_host_init(vhost); 3949 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 3950 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3951 break; 3952 case IBMVFC_MAD_DRIVER_FAILED: 3953 break; 3954 default: 3955 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3956 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3957 break; 3958 } 3959 3960 ibmvfc_free_event(evt); 3961 wake_up(&vhost->work_wait_q); 3962 } 3963 3964 /** 3965 * ibmvfc_discover_targets - Send Discover Targets MAD 3966 * @vhost: ibmvfc host struct 3967 * 3968 **/ 3969 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3970 { 3971 struct ibmvfc_discover_targets *mad; 3972 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3973 3974 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3975 mad = &evt->iu.discover_targets; 3976 memset(mad, 0, sizeof(*mad)); 3977 mad->common.version = 1; 3978 mad->common.opcode = IBMVFC_DISC_TARGETS; 3979 mad->common.length = sizeof(*mad); 3980 mad->bufflen = vhost->disc_buf_sz; 3981 mad->buffer.va = vhost->disc_buf_dma; 3982 mad->buffer.len = vhost->disc_buf_sz; 3983 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3984 3985 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3986 ibmvfc_dbg(vhost, "Sent discover targets\n"); 3987 else 3988 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3989 } 3990 3991 /** 3992 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 3993 * @evt: ibmvfc event struct 3994 * 3995 **/ 3996 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 3997 { 3998 struct ibmvfc_host *vhost = evt->vhost; 3999 u32 mad_status = evt->xfer_iu->npiv_login.common.status; 4000 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 4001 unsigned int npiv_max_sectors; 4002 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4003 4004 switch (mad_status) { 4005 case IBMVFC_MAD_SUCCESS: 4006 ibmvfc_free_event(evt); 4007 break; 4008 case IBMVFC_MAD_FAILED: 4009 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 4010 level += ibmvfc_retry_host_init(vhost); 4011 else 4012 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4013 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 4014 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 4015 ibmvfc_free_event(evt); 4016 return; 4017 case IBMVFC_MAD_CRQ_ERROR: 4018 ibmvfc_retry_host_init(vhost); 4019 case IBMVFC_MAD_DRIVER_FAILED: 4020 ibmvfc_free_event(evt); 4021 return; 4022 default: 4023 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 4024 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4025 ibmvfc_free_event(evt); 4026 return; 4027 } 4028 4029 vhost->client_migrated = 0; 4030 4031 if (!(rsp->flags & IBMVFC_NATIVE_FC)) { 4032 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 4033 rsp->flags); 4034 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4035 wake_up(&vhost->work_wait_q); 4036 return; 4037 } 4038 4039 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { 4040 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 4041 rsp->max_cmds); 4042 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4043 wake_up(&vhost->work_wait_q); 4044 return; 4045 } 4046 4047 vhost->logged_in = 1; 4048 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); 4049 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 4050 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 4051 rsp->drc_name, npiv_max_sectors); 4052 4053 fc_host_fabric_name(vhost->host) = rsp->node_name; 4054 fc_host_node_name(vhost->host) = rsp->node_name; 4055 fc_host_port_name(vhost->host) = rsp->port_name; 4056 fc_host_port_id(vhost->host) = rsp->scsi_id; 4057 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 4058 fc_host_supported_classes(vhost->host) = 0; 4059 if (rsp->service_parms.class1_parms[0] & 0x80000000) 4060 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 4061 if (rsp->service_parms.class2_parms[0] & 0x80000000) 4062 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 4063 if (rsp->service_parms.class3_parms[0] & 0x80000000) 4064 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 4065 fc_host_maxframe_size(vhost->host) = 4066 rsp->service_parms.common.bb_rcv_sz & 0x0fff; 4067 4068 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; 4069 vhost->host->max_sectors = npiv_max_sectors; 4070 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4071 wake_up(&vhost->work_wait_q); 4072 } 4073 4074 /** 4075 * ibmvfc_npiv_login - Sends NPIV login 4076 * @vhost: ibmvfc host struct 4077 * 4078 **/ 4079 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 4080 { 4081 struct ibmvfc_npiv_login_mad *mad; 4082 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4083 4084 ibmvfc_gather_partition_info(vhost); 4085 ibmvfc_set_login_info(vhost); 4086 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 4087 4088 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 4089 mad = &evt->iu.npiv_login; 4090 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 4091 mad->common.version = 1; 4092 mad->common.opcode = IBMVFC_NPIV_LOGIN; 4093 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); 4094 mad->buffer.va = vhost->login_buf_dma; 4095 mad->buffer.len = sizeof(*vhost->login_buf); 4096 4097 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4098 4099 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4100 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 4101 else 4102 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4103 }; 4104 4105 /** 4106 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 4107 * @vhost: ibmvfc host struct 4108 * 4109 **/ 4110 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 4111 { 4112 struct ibmvfc_host *vhost = evt->vhost; 4113 u32 mad_status = evt->xfer_iu->npiv_logout.common.status; 4114 4115 ibmvfc_free_event(evt); 4116 4117 switch (mad_status) { 4118 case IBMVFC_MAD_SUCCESS: 4119 if (list_empty(&vhost->sent) && 4120 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 4121 ibmvfc_init_host(vhost); 4122 return; 4123 } 4124 break; 4125 case IBMVFC_MAD_FAILED: 4126 case IBMVFC_MAD_NOT_SUPPORTED: 4127 case IBMVFC_MAD_CRQ_ERROR: 4128 case IBMVFC_MAD_DRIVER_FAILED: 4129 default: 4130 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 4131 break; 4132 } 4133 4134 ibmvfc_hard_reset_host(vhost); 4135 } 4136 4137 /** 4138 * ibmvfc_npiv_logout - Issue an NPIV Logout 4139 * @vhost: ibmvfc host struct 4140 * 4141 **/ 4142 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 4143 { 4144 struct ibmvfc_npiv_logout_mad *mad; 4145 struct ibmvfc_event *evt; 4146 4147 evt = ibmvfc_get_event(vhost); 4148 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 4149 4150 mad = &evt->iu.npiv_logout; 4151 memset(mad, 0, sizeof(*mad)); 4152 mad->common.version = 1; 4153 mad->common.opcode = IBMVFC_NPIV_LOGOUT; 4154 mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad); 4155 4156 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 4157 4158 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4159 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 4160 else 4161 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4162 } 4163 4164 /** 4165 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 4166 * @vhost: ibmvfc host struct 4167 * 4168 * Returns: 4169 * 1 if work to do / 0 if not 4170 **/ 4171 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 4172 { 4173 struct ibmvfc_target *tgt; 4174 4175 list_for_each_entry(tgt, &vhost->targets, queue) { 4176 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 4177 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4178 return 1; 4179 } 4180 4181 return 0; 4182 } 4183 4184 /** 4185 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 4186 * @vhost: ibmvfc host struct 4187 * 4188 * Returns: 4189 * 1 if work to do / 0 if not 4190 **/ 4191 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4192 { 4193 struct ibmvfc_target *tgt; 4194 4195 if (kthread_should_stop()) 4196 return 1; 4197 switch (vhost->action) { 4198 case IBMVFC_HOST_ACTION_NONE: 4199 case IBMVFC_HOST_ACTION_INIT_WAIT: 4200 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4201 return 0; 4202 case IBMVFC_HOST_ACTION_TGT_INIT: 4203 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4204 if (vhost->discovery_threads == disc_threads) 4205 return 0; 4206 list_for_each_entry(tgt, &vhost->targets, queue) 4207 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 4208 return 1; 4209 list_for_each_entry(tgt, &vhost->targets, queue) 4210 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4211 return 0; 4212 return 1; 4213 case IBMVFC_HOST_ACTION_LOGO: 4214 case IBMVFC_HOST_ACTION_INIT: 4215 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4216 case IBMVFC_HOST_ACTION_TGT_DEL: 4217 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4218 case IBMVFC_HOST_ACTION_QUERY: 4219 case IBMVFC_HOST_ACTION_RESET: 4220 case IBMVFC_HOST_ACTION_REENABLE: 4221 default: 4222 break; 4223 }; 4224 4225 return 1; 4226 } 4227 4228 /** 4229 * ibmvfc_work_to_do - Is there task level work to do? 4230 * @vhost: ibmvfc host struct 4231 * 4232 * Returns: 4233 * 1 if work to do / 0 if not 4234 **/ 4235 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4236 { 4237 unsigned long flags; 4238 int rc; 4239 4240 spin_lock_irqsave(vhost->host->host_lock, flags); 4241 rc = __ibmvfc_work_to_do(vhost); 4242 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4243 return rc; 4244 } 4245 4246 /** 4247 * ibmvfc_log_ae - Log async events if necessary 4248 * @vhost: ibmvfc host struct 4249 * @events: events to log 4250 * 4251 **/ 4252 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 4253 { 4254 if (events & IBMVFC_AE_RSCN) 4255 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 4256 if ((events & IBMVFC_AE_LINKDOWN) && 4257 vhost->state >= IBMVFC_HALTED) 4258 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 4259 if ((events & IBMVFC_AE_LINKUP) && 4260 vhost->state == IBMVFC_INITIALIZING) 4261 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 4262 } 4263 4264 /** 4265 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 4266 * @tgt: ibmvfc target struct 4267 * 4268 **/ 4269 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 4270 { 4271 struct ibmvfc_host *vhost = tgt->vhost; 4272 struct fc_rport *rport; 4273 unsigned long flags; 4274 4275 tgt_dbg(tgt, "Adding rport\n"); 4276 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 4277 spin_lock_irqsave(vhost->host->host_lock, flags); 4278 4279 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4280 tgt_dbg(tgt, "Deleting rport\n"); 4281 list_del(&tgt->queue); 4282 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4283 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4284 fc_remote_port_delete(rport); 4285 del_timer_sync(&tgt->timer); 4286 kref_put(&tgt->kref, ibmvfc_release_tgt); 4287 return; 4288 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 4289 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4290 return; 4291 } 4292 4293 if (rport) { 4294 tgt_dbg(tgt, "rport add succeeded\n"); 4295 tgt->rport = rport; 4296 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; 4297 rport->supported_classes = 0; 4298 tgt->target_id = rport->scsi_target_id; 4299 if (tgt->service_parms.class1_parms[0] & 0x80000000) 4300 rport->supported_classes |= FC_COS_CLASS1; 4301 if (tgt->service_parms.class2_parms[0] & 0x80000000) 4302 rport->supported_classes |= FC_COS_CLASS2; 4303 if (tgt->service_parms.class3_parms[0] & 0x80000000) 4304 rport->supported_classes |= FC_COS_CLASS3; 4305 if (rport->rqst_q) 4306 blk_queue_max_segments(rport->rqst_q, 1); 4307 } else 4308 tgt_dbg(tgt, "rport add failed\n"); 4309 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4310 } 4311 4312 /** 4313 * ibmvfc_do_work - Do task level work 4314 * @vhost: ibmvfc host struct 4315 * 4316 **/ 4317 static void ibmvfc_do_work(struct ibmvfc_host *vhost) 4318 { 4319 struct ibmvfc_target *tgt; 4320 unsigned long flags; 4321 struct fc_rport *rport; 4322 int rc; 4323 4324 ibmvfc_log_ae(vhost, vhost->events_to_log); 4325 spin_lock_irqsave(vhost->host->host_lock, flags); 4326 vhost->events_to_log = 0; 4327 switch (vhost->action) { 4328 case IBMVFC_HOST_ACTION_NONE: 4329 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4330 case IBMVFC_HOST_ACTION_INIT_WAIT: 4331 break; 4332 case IBMVFC_HOST_ACTION_RESET: 4333 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4334 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4335 rc = ibmvfc_reset_crq(vhost); 4336 spin_lock_irqsave(vhost->host->host_lock, flags); 4337 if (rc == H_CLOSED) 4338 vio_enable_interrupts(to_vio_dev(vhost->dev)); 4339 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 4340 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 4341 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4342 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 4343 } 4344 break; 4345 case IBMVFC_HOST_ACTION_REENABLE: 4346 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4347 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4348 rc = ibmvfc_reenable_crq_queue(vhost); 4349 spin_lock_irqsave(vhost->host->host_lock, flags); 4350 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 4351 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4352 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 4353 } 4354 break; 4355 case IBMVFC_HOST_ACTION_LOGO: 4356 vhost->job_step(vhost); 4357 break; 4358 case IBMVFC_HOST_ACTION_INIT: 4359 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 4360 if (vhost->delay_init) { 4361 vhost->delay_init = 0; 4362 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4363 ssleep(15); 4364 return; 4365 } else 4366 vhost->job_step(vhost); 4367 break; 4368 case IBMVFC_HOST_ACTION_QUERY: 4369 list_for_each_entry(tgt, &vhost->targets, queue) 4370 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 4371 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 4372 break; 4373 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4374 list_for_each_entry(tgt, &vhost->targets, queue) { 4375 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4376 tgt->job_step(tgt); 4377 break; 4378 } 4379 } 4380 4381 if (!ibmvfc_dev_init_to_do(vhost)) 4382 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 4383 break; 4384 case IBMVFC_HOST_ACTION_TGT_DEL: 4385 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4386 list_for_each_entry(tgt, &vhost->targets, queue) { 4387 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4388 tgt_dbg(tgt, "Deleting rport\n"); 4389 rport = tgt->rport; 4390 tgt->rport = NULL; 4391 list_del(&tgt->queue); 4392 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4393 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4394 if (rport) 4395 fc_remote_port_delete(rport); 4396 del_timer_sync(&tgt->timer); 4397 kref_put(&tgt->kref, ibmvfc_release_tgt); 4398 return; 4399 } 4400 } 4401 4402 if (vhost->state == IBMVFC_INITIALIZING) { 4403 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 4404 if (vhost->reinit) { 4405 vhost->reinit = 0; 4406 scsi_block_requests(vhost->host); 4407 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4408 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4409 } else { 4410 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 4411 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4412 wake_up(&vhost->init_wait_q); 4413 schedule_work(&vhost->rport_add_work_q); 4414 vhost->init_retries = 0; 4415 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4416 scsi_unblock_requests(vhost->host); 4417 } 4418 4419 return; 4420 } else { 4421 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 4422 vhost->job_step = ibmvfc_discover_targets; 4423 } 4424 } else { 4425 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4426 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4427 scsi_unblock_requests(vhost->host); 4428 wake_up(&vhost->init_wait_q); 4429 return; 4430 } 4431 break; 4432 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4433 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4434 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4435 ibmvfc_alloc_targets(vhost); 4436 spin_lock_irqsave(vhost->host->host_lock, flags); 4437 break; 4438 case IBMVFC_HOST_ACTION_TGT_INIT: 4439 list_for_each_entry(tgt, &vhost->targets, queue) { 4440 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4441 tgt->job_step(tgt); 4442 break; 4443 } 4444 } 4445 4446 if (!ibmvfc_dev_init_to_do(vhost)) 4447 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4448 break; 4449 default: 4450 break; 4451 }; 4452 4453 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4454 } 4455 4456 /** 4457 * ibmvfc_work - Do task level work 4458 * @data: ibmvfc host struct 4459 * 4460 * Returns: 4461 * zero 4462 **/ 4463 static int ibmvfc_work(void *data) 4464 { 4465 struct ibmvfc_host *vhost = data; 4466 int rc; 4467 4468 set_user_nice(current, -20); 4469 4470 while (1) { 4471 rc = wait_event_interruptible(vhost->work_wait_q, 4472 ibmvfc_work_to_do(vhost)); 4473 4474 BUG_ON(rc); 4475 4476 if (kthread_should_stop()) 4477 break; 4478 4479 ibmvfc_do_work(vhost); 4480 } 4481 4482 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4483 return 0; 4484 } 4485 4486 /** 4487 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4488 * @vhost: ibmvfc host struct 4489 * 4490 * Allocates a page for messages, maps it for dma, and registers 4491 * the crq with the hypervisor. 4492 * 4493 * Return value: 4494 * zero on success / other on failure 4495 **/ 4496 static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4497 { 4498 int rc, retrc = -ENOMEM; 4499 struct device *dev = vhost->dev; 4500 struct vio_dev *vdev = to_vio_dev(dev); 4501 struct ibmvfc_crq_queue *crq = &vhost->crq; 4502 4503 ENTER; 4504 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4505 4506 if (!crq->msgs) 4507 return -ENOMEM; 4508 4509 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4510 crq->msg_token = dma_map_single(dev, crq->msgs, 4511 PAGE_SIZE, DMA_BIDIRECTIONAL); 4512 4513 if (dma_mapping_error(dev, crq->msg_token)) 4514 goto map_failed; 4515 4516 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4517 crq->msg_token, PAGE_SIZE); 4518 4519 if (rc == H_RESOURCE) 4520 /* maybe kexecing and resource is busy. try a reset */ 4521 retrc = rc = ibmvfc_reset_crq(vhost); 4522 4523 if (rc == H_CLOSED) 4524 dev_warn(dev, "Partner adapter not ready\n"); 4525 else if (rc) { 4526 dev_warn(dev, "Error %d opening adapter\n", rc); 4527 goto reg_crq_failed; 4528 } 4529 4530 retrc = 0; 4531 4532 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4533 4534 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4535 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4536 goto req_irq_failed; 4537 } 4538 4539 if ((rc = vio_enable_interrupts(vdev))) { 4540 dev_err(dev, "Error %d enabling interrupts\n", rc); 4541 goto req_irq_failed; 4542 } 4543 4544 crq->cur = 0; 4545 LEAVE; 4546 return retrc; 4547 4548 req_irq_failed: 4549 tasklet_kill(&vhost->tasklet); 4550 do { 4551 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4552 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4553 reg_crq_failed: 4554 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4555 map_failed: 4556 free_page((unsigned long)crq->msgs); 4557 return retrc; 4558 } 4559 4560 /** 4561 * ibmvfc_free_mem - Free memory for vhost 4562 * @vhost: ibmvfc host struct 4563 * 4564 * Return value: 4565 * none 4566 **/ 4567 static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4568 { 4569 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4570 4571 ENTER; 4572 mempool_destroy(vhost->tgt_pool); 4573 kfree(vhost->trace); 4574 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4575 vhost->disc_buf_dma); 4576 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4577 vhost->login_buf, vhost->login_buf_dma); 4578 dma_pool_destroy(vhost->sg_pool); 4579 dma_unmap_single(vhost->dev, async_q->msg_token, 4580 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4581 free_page((unsigned long)async_q->msgs); 4582 LEAVE; 4583 } 4584 4585 /** 4586 * ibmvfc_alloc_mem - Allocate memory for vhost 4587 * @vhost: ibmvfc host struct 4588 * 4589 * Return value: 4590 * 0 on success / non-zero on failure 4591 **/ 4592 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4593 { 4594 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4595 struct device *dev = vhost->dev; 4596 4597 ENTER; 4598 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4599 if (!async_q->msgs) { 4600 dev_err(dev, "Couldn't allocate async queue.\n"); 4601 goto nomem; 4602 } 4603 4604 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4605 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4606 async_q->size * sizeof(*async_q->msgs), 4607 DMA_BIDIRECTIONAL); 4608 4609 if (dma_mapping_error(dev, async_q->msg_token)) { 4610 dev_err(dev, "Failed to map async queue\n"); 4611 goto free_async_crq; 4612 } 4613 4614 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4615 SG_ALL * sizeof(struct srp_direct_buf), 4616 sizeof(struct srp_direct_buf), 0); 4617 4618 if (!vhost->sg_pool) { 4619 dev_err(dev, "Failed to allocate sg pool\n"); 4620 goto unmap_async_crq; 4621 } 4622 4623 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4624 &vhost->login_buf_dma, GFP_KERNEL); 4625 4626 if (!vhost->login_buf) { 4627 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4628 goto free_sg_pool; 4629 } 4630 4631 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4632 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4633 &vhost->disc_buf_dma, GFP_KERNEL); 4634 4635 if (!vhost->disc_buf) { 4636 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4637 goto free_login_buffer; 4638 } 4639 4640 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4641 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4642 4643 if (!vhost->trace) 4644 goto free_disc_buffer; 4645 4646 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4647 sizeof(struct ibmvfc_target)); 4648 4649 if (!vhost->tgt_pool) { 4650 dev_err(dev, "Couldn't allocate target memory pool\n"); 4651 goto free_trace; 4652 } 4653 4654 LEAVE; 4655 return 0; 4656 4657 free_trace: 4658 kfree(vhost->trace); 4659 free_disc_buffer: 4660 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4661 vhost->disc_buf_dma); 4662 free_login_buffer: 4663 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4664 vhost->login_buf, vhost->login_buf_dma); 4665 free_sg_pool: 4666 dma_pool_destroy(vhost->sg_pool); 4667 unmap_async_crq: 4668 dma_unmap_single(dev, async_q->msg_token, 4669 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4670 free_async_crq: 4671 free_page((unsigned long)async_q->msgs); 4672 nomem: 4673 LEAVE; 4674 return -ENOMEM; 4675 } 4676 4677 /** 4678 * ibmvfc_rport_add_thread - Worker thread for rport adds 4679 * @work: work struct 4680 * 4681 **/ 4682 static void ibmvfc_rport_add_thread(struct work_struct *work) 4683 { 4684 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4685 rport_add_work_q); 4686 struct ibmvfc_target *tgt; 4687 struct fc_rport *rport; 4688 unsigned long flags; 4689 int did_work; 4690 4691 ENTER; 4692 spin_lock_irqsave(vhost->host->host_lock, flags); 4693 do { 4694 did_work = 0; 4695 if (vhost->state != IBMVFC_ACTIVE) 4696 break; 4697 4698 list_for_each_entry(tgt, &vhost->targets, queue) { 4699 if (tgt->add_rport) { 4700 did_work = 1; 4701 tgt->add_rport = 0; 4702 kref_get(&tgt->kref); 4703 rport = tgt->rport; 4704 if (!rport) { 4705 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4706 ibmvfc_tgt_add_rport(tgt); 4707 } else if (get_device(&rport->dev)) { 4708 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4709 tgt_dbg(tgt, "Setting rport roles\n"); 4710 fc_remote_port_rolechg(rport, tgt->ids.roles); 4711 put_device(&rport->dev); 4712 } 4713 4714 kref_put(&tgt->kref, ibmvfc_release_tgt); 4715 spin_lock_irqsave(vhost->host->host_lock, flags); 4716 break; 4717 } 4718 } 4719 } while(did_work); 4720 4721 if (vhost->state == IBMVFC_ACTIVE) 4722 vhost->scan_complete = 1; 4723 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4724 LEAVE; 4725 } 4726 4727 /** 4728 * ibmvfc_probe - Adapter hot plug add entry point 4729 * @vdev: vio device struct 4730 * @id: vio device id struct 4731 * 4732 * Return value: 4733 * 0 on success / non-zero on failure 4734 **/ 4735 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4736 { 4737 struct ibmvfc_host *vhost; 4738 struct Scsi_Host *shost; 4739 struct device *dev = &vdev->dev; 4740 int rc = -ENOMEM; 4741 4742 ENTER; 4743 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4744 if (!shost) { 4745 dev_err(dev, "Couldn't allocate host data\n"); 4746 goto out; 4747 } 4748 4749 shost->transportt = ibmvfc_transport_template; 4750 shost->can_queue = max_requests; 4751 shost->max_lun = max_lun; 4752 shost->max_id = max_targets; 4753 shost->max_sectors = IBMVFC_MAX_SECTORS; 4754 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4755 shost->unique_id = shost->host_no; 4756 4757 vhost = shost_priv(shost); 4758 INIT_LIST_HEAD(&vhost->sent); 4759 INIT_LIST_HEAD(&vhost->free); 4760 INIT_LIST_HEAD(&vhost->targets); 4761 sprintf(vhost->name, IBMVFC_NAME); 4762 vhost->host = shost; 4763 vhost->dev = dev; 4764 vhost->partition_number = -1; 4765 vhost->log_level = log_level; 4766 vhost->task_set = 1; 4767 strcpy(vhost->partition_name, "UNKNOWN"); 4768 init_waitqueue_head(&vhost->work_wait_q); 4769 init_waitqueue_head(&vhost->init_wait_q); 4770 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4771 mutex_init(&vhost->passthru_mutex); 4772 4773 if ((rc = ibmvfc_alloc_mem(vhost))) 4774 goto free_scsi_host; 4775 4776 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4777 shost->host_no); 4778 4779 if (IS_ERR(vhost->work_thread)) { 4780 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4781 PTR_ERR(vhost->work_thread)); 4782 goto free_host_mem; 4783 } 4784 4785 if ((rc = ibmvfc_init_crq(vhost))) { 4786 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4787 goto kill_kthread; 4788 } 4789 4790 if ((rc = ibmvfc_init_event_pool(vhost))) { 4791 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4792 goto release_crq; 4793 } 4794 4795 if ((rc = scsi_add_host(shost, dev))) 4796 goto release_event_pool; 4797 4798 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 4799 4800 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4801 &ibmvfc_trace_attr))) { 4802 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4803 goto remove_shost; 4804 } 4805 4806 if (shost_to_fc_host(shost)->rqst_q) 4807 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 4808 dev_set_drvdata(dev, vhost); 4809 spin_lock(&ibmvfc_driver_lock); 4810 list_add_tail(&vhost->queue, &ibmvfc_head); 4811 spin_unlock(&ibmvfc_driver_lock); 4812 4813 ibmvfc_send_crq_init(vhost); 4814 scsi_scan_host(shost); 4815 return 0; 4816 4817 remove_shost: 4818 scsi_remove_host(shost); 4819 release_event_pool: 4820 ibmvfc_free_event_pool(vhost); 4821 release_crq: 4822 ibmvfc_release_crq_queue(vhost); 4823 kill_kthread: 4824 kthread_stop(vhost->work_thread); 4825 free_host_mem: 4826 ibmvfc_free_mem(vhost); 4827 free_scsi_host: 4828 scsi_host_put(shost); 4829 out: 4830 LEAVE; 4831 return rc; 4832 } 4833 4834 /** 4835 * ibmvfc_remove - Adapter hot plug remove entry point 4836 * @vdev: vio device struct 4837 * 4838 * Return value: 4839 * 0 4840 **/ 4841 static int ibmvfc_remove(struct vio_dev *vdev) 4842 { 4843 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4844 unsigned long flags; 4845 4846 ENTER; 4847 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4848 4849 spin_lock_irqsave(vhost->host->host_lock, flags); 4850 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4851 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4852 4853 ibmvfc_wait_while_resetting(vhost); 4854 ibmvfc_release_crq_queue(vhost); 4855 kthread_stop(vhost->work_thread); 4856 fc_remove_host(vhost->host); 4857 scsi_remove_host(vhost->host); 4858 4859 spin_lock_irqsave(vhost->host->host_lock, flags); 4860 ibmvfc_purge_requests(vhost, DID_ERROR); 4861 ibmvfc_free_event_pool(vhost); 4862 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4863 4864 ibmvfc_free_mem(vhost); 4865 spin_lock(&ibmvfc_driver_lock); 4866 list_del(&vhost->queue); 4867 spin_unlock(&ibmvfc_driver_lock); 4868 scsi_host_put(vhost->host); 4869 LEAVE; 4870 return 0; 4871 } 4872 4873 /** 4874 * ibmvfc_resume - Resume from suspend 4875 * @dev: device struct 4876 * 4877 * We may have lost an interrupt across suspend/resume, so kick the 4878 * interrupt handler 4879 * 4880 */ 4881 static int ibmvfc_resume(struct device *dev) 4882 { 4883 unsigned long flags; 4884 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 4885 struct vio_dev *vdev = to_vio_dev(dev); 4886 4887 spin_lock_irqsave(vhost->host->host_lock, flags); 4888 vio_disable_interrupts(vdev); 4889 tasklet_schedule(&vhost->tasklet); 4890 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4891 return 0; 4892 } 4893 4894 /** 4895 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4896 * @vdev: vio device struct 4897 * 4898 * Return value: 4899 * Number of bytes the driver will need to DMA map at the same time in 4900 * order to perform well. 4901 */ 4902 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4903 { 4904 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4905 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4906 } 4907 4908 static struct vio_device_id ibmvfc_device_table[] __devinitdata = { 4909 {"fcp", "IBM,vfc-client"}, 4910 { "", "" } 4911 }; 4912 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4913 4914 static struct dev_pm_ops ibmvfc_pm_ops = { 4915 .resume = ibmvfc_resume 4916 }; 4917 4918 static struct vio_driver ibmvfc_driver = { 4919 .id_table = ibmvfc_device_table, 4920 .probe = ibmvfc_probe, 4921 .remove = ibmvfc_remove, 4922 .get_desired_dma = ibmvfc_get_desired_dma, 4923 .name = IBMVFC_NAME, 4924 .pm = &ibmvfc_pm_ops, 4925 }; 4926 4927 static struct fc_function_template ibmvfc_transport_functions = { 4928 .show_host_fabric_name = 1, 4929 .show_host_node_name = 1, 4930 .show_host_port_name = 1, 4931 .show_host_supported_classes = 1, 4932 .show_host_port_type = 1, 4933 .show_host_port_id = 1, 4934 .show_host_maxframe_size = 1, 4935 4936 .get_host_port_state = ibmvfc_get_host_port_state, 4937 .show_host_port_state = 1, 4938 4939 .get_host_speed = ibmvfc_get_host_speed, 4940 .show_host_speed = 1, 4941 4942 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4943 .terminate_rport_io = ibmvfc_terminate_rport_io, 4944 4945 .show_rport_maxframe_size = 1, 4946 .show_rport_supported_classes = 1, 4947 4948 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4949 .show_rport_dev_loss_tmo = 1, 4950 4951 .get_starget_node_name = ibmvfc_get_starget_node_name, 4952 .show_starget_node_name = 1, 4953 4954 .get_starget_port_name = ibmvfc_get_starget_port_name, 4955 .show_starget_port_name = 1, 4956 4957 .get_starget_port_id = ibmvfc_get_starget_port_id, 4958 .show_starget_port_id = 1, 4959 4960 .bsg_request = ibmvfc_bsg_request, 4961 .bsg_timeout = ibmvfc_bsg_timeout, 4962 }; 4963 4964 /** 4965 * ibmvfc_module_init - Initialize the ibmvfc module 4966 * 4967 * Return value: 4968 * 0 on success / other on failure 4969 **/ 4970 static int __init ibmvfc_module_init(void) 4971 { 4972 int rc; 4973 4974 if (!firmware_has_feature(FW_FEATURE_VIO)) 4975 return -ENODEV; 4976 4977 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4978 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4979 4980 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4981 if (!ibmvfc_transport_template) 4982 return -ENOMEM; 4983 4984 rc = vio_register_driver(&ibmvfc_driver); 4985 if (rc) 4986 fc_release_transport(ibmvfc_transport_template); 4987 return rc; 4988 } 4989 4990 /** 4991 * ibmvfc_module_exit - Teardown the ibmvfc module 4992 * 4993 * Return value: 4994 * nothing 4995 **/ 4996 static void __exit ibmvfc_module_exit(void) 4997 { 4998 vio_unregister_driver(&ibmvfc_driver); 4999 fc_release_transport(ibmvfc_transport_template); 5000 } 5001 5002 module_init(ibmvfc_module_init); 5003 module_exit(ibmvfc_module_exit); 5004