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 u64 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, ullong, 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 = be64_to_cpu(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 = be32_to_cpu(vfc_cmd->iu.xfer_len); 173 break; 174 case IBMVFC_MAD_FORMAT: 175 entry->op_code = be32_to_cpu(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 = be64_to_cpu(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 = be16_to_cpu(vfc_cmd->status); 206 entry->u.end.error = be16_to_cpu(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 = be32_to_cpu(mad->opcode); 213 entry->u.end.status = be16_to_cpu(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 = be32_to_cpu(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(be16_to_cpu(vfc_cmd->status), be16_to_cpu(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 = cpu_to_be16(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 (be64_to_cpu(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 be64_to_cpu(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 = cpu_to_be32(IBMVFC_OS_LINUX); 1175 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); 1176 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); 1177 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); 1178 login_info->partition_num = cpu_to_be32(vhost->partition_number); 1179 login_info->vfc_frame_version = cpu_to_be32(1); 1180 login_info->fcp_version = cpu_to_be16(3); 1181 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); 1182 if (vhost->client_migrated) 1183 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); 1184 1185 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ); 1186 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE); 1187 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); 1188 login_info->async.len = cpu_to_be32(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 = cpu_to_be64(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 = cpu_to_be64(sg_dma_address(sg)); 1314 md[i].len = cpu_to_be32(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 |= cpu_to_be16(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 |= cpu_to_be16(IBMVFC_WRITE); 1350 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1351 } else { 1352 vfc_cmd->flags |= cpu_to_be16(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 |= cpu_to_be16(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 = cpu_to_be64(evt->ext_list_token); 1378 data->len = cpu_to_be32(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 __be64 *crq_as_u64 = (__be64 *) &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 = cpu_to_be64((u64)evt); 1414 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1415 evt->xfer_iu->mad_common.tag = cpu_to_be64((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, be64_to_cpu(crq_as_u64[0]), 1432 be64_to_cpu(crq_as_u64[1])))) { 1433 list_del(&evt->queue); 1434 del_timer(&evt->timer); 1435 1436 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1437 * Firmware will send a CRQ with a transport event (0xFF) to 1438 * tell this client what has happened to the transport. This 1439 * will be handled in ibmvfc_handle_crq() 1440 */ 1441 if (rc == H_CLOSED) { 1442 if (printk_ratelimit()) 1443 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1444 if (evt->cmnd) 1445 scsi_dma_unmap(evt->cmnd); 1446 ibmvfc_free_event(evt); 1447 return SCSI_MLQUEUE_HOST_BUSY; 1448 } 1449 1450 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1451 if (evt->cmnd) { 1452 evt->cmnd->result = DID_ERROR << 16; 1453 evt->done = ibmvfc_scsi_eh_done; 1454 } else 1455 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); 1456 1457 evt->done(evt); 1458 } else 1459 ibmvfc_trc_start(evt); 1460 1461 return 0; 1462 } 1463 1464 /** 1465 * ibmvfc_log_error - Log an error for the failed command if appropriate 1466 * @evt: ibmvfc event to log 1467 * 1468 **/ 1469 static void ibmvfc_log_error(struct ibmvfc_event *evt) 1470 { 1471 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1472 struct ibmvfc_host *vhost = evt->vhost; 1473 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1474 struct scsi_cmnd *cmnd = evt->cmnd; 1475 const char *err = unknown_error; 1476 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 1477 int logerr = 0; 1478 int rsp_code = 0; 1479 1480 if (index >= 0) { 1481 logerr = cmd_status[index].log; 1482 err = cmd_status[index].name; 1483 } 1484 1485 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1486 return; 1487 1488 if (rsp->flags & FCP_RSP_LEN_VALID) 1489 rsp_code = rsp->data.info.rsp_code; 1490 1491 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1492 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1493 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1494 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1495 } 1496 1497 /** 1498 * ibmvfc_relogin - Log back into the specified device 1499 * @sdev: scsi device struct 1500 * 1501 **/ 1502 static void ibmvfc_relogin(struct scsi_device *sdev) 1503 { 1504 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1505 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1506 struct ibmvfc_target *tgt; 1507 1508 list_for_each_entry(tgt, &vhost->targets, queue) { 1509 if (rport == tgt->rport) { 1510 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 1511 break; 1512 } 1513 } 1514 1515 ibmvfc_reinit_host(vhost); 1516 } 1517 1518 /** 1519 * ibmvfc_scsi_done - Handle responses from commands 1520 * @evt: ibmvfc event to be handled 1521 * 1522 * Used as a callback when sending scsi cmds. 1523 **/ 1524 static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1525 { 1526 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1527 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1528 struct scsi_cmnd *cmnd = evt->cmnd; 1529 u32 rsp_len = 0; 1530 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); 1531 1532 if (cmnd) { 1533 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) 1534 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); 1535 else if (rsp->flags & FCP_RESID_UNDER) 1536 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); 1537 else 1538 scsi_set_resid(cmnd, 0); 1539 1540 if (vfc_cmd->status) { 1541 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1542 1543 if (rsp->flags & FCP_RSP_LEN_VALID) 1544 rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 1545 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1546 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1547 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1548 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1549 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && 1550 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) 1551 ibmvfc_relogin(cmnd->device); 1552 1553 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1554 cmnd->result = (DID_ERROR << 16); 1555 1556 ibmvfc_log_error(evt); 1557 } 1558 1559 if (!cmnd->result && 1560 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1561 cmnd->result = (DID_ERROR << 16); 1562 1563 scsi_dma_unmap(cmnd); 1564 cmnd->scsi_done(cmnd); 1565 } 1566 1567 if (evt->eh_comp) 1568 complete(evt->eh_comp); 1569 1570 ibmvfc_free_event(evt); 1571 } 1572 1573 /** 1574 * ibmvfc_host_chkready - Check if the host can accept commands 1575 * @vhost: struct ibmvfc host 1576 * 1577 * Returns: 1578 * 1 if host can accept command / 0 if not 1579 **/ 1580 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1581 { 1582 int result = 0; 1583 1584 switch (vhost->state) { 1585 case IBMVFC_LINK_DEAD: 1586 case IBMVFC_HOST_OFFLINE: 1587 result = DID_NO_CONNECT << 16; 1588 break; 1589 case IBMVFC_NO_CRQ: 1590 case IBMVFC_INITIALIZING: 1591 case IBMVFC_HALTED: 1592 case IBMVFC_LINK_DOWN: 1593 result = DID_REQUEUE << 16; 1594 break; 1595 case IBMVFC_ACTIVE: 1596 result = 0; 1597 break; 1598 }; 1599 1600 return result; 1601 } 1602 1603 /** 1604 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1605 * @cmnd: struct scsi_cmnd to be executed 1606 * @done: Callback function to be called when cmnd is completed 1607 * 1608 * Returns: 1609 * 0 on success / other on failure 1610 **/ 1611 static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd, 1612 void (*done) (struct scsi_cmnd *)) 1613 { 1614 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1615 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1616 struct ibmvfc_cmd *vfc_cmd; 1617 struct ibmvfc_event *evt; 1618 int rc; 1619 1620 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1621 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1622 cmnd->result = rc; 1623 done(cmnd); 1624 return 0; 1625 } 1626 1627 cmnd->result = (DID_OK << 16); 1628 evt = ibmvfc_get_event(vhost); 1629 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1630 evt->cmnd = cmnd; 1631 cmnd->scsi_done = done; 1632 vfc_cmd = &evt->iu.cmd; 1633 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1634 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 1635 vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp)); 1636 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1637 vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu)); 1638 vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp)); 1639 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata); 1640 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); 1641 vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); 1642 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1643 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1644 1645 if (cmnd->flags & SCMD_TAGGED) { 1646 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag); 1647 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1648 } 1649 1650 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1651 return ibmvfc_send_event(evt, vhost, 0); 1652 1653 ibmvfc_free_event(evt); 1654 if (rc == -ENOMEM) 1655 return SCSI_MLQUEUE_HOST_BUSY; 1656 1657 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1658 scmd_printk(KERN_ERR, cmnd, 1659 "Failed to map DMA buffer for command. rc=%d\n", rc); 1660 1661 cmnd->result = DID_ERROR << 16; 1662 done(cmnd); 1663 return 0; 1664 } 1665 1666 static DEF_SCSI_QCMD(ibmvfc_queuecommand) 1667 1668 /** 1669 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1670 * @evt: ibmvfc event struct 1671 * 1672 **/ 1673 static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1674 { 1675 /* copy the response back */ 1676 if (evt->sync_iu) 1677 *evt->sync_iu = *evt->xfer_iu; 1678 1679 complete(&evt->comp); 1680 } 1681 1682 /** 1683 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 1684 * @evt: struct ibmvfc_event 1685 * 1686 **/ 1687 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 1688 { 1689 struct ibmvfc_host *vhost = evt->vhost; 1690 1691 ibmvfc_free_event(evt); 1692 vhost->aborting_passthru = 0; 1693 dev_info(vhost->dev, "Passthru command cancelled\n"); 1694 } 1695 1696 /** 1697 * ibmvfc_bsg_timeout - Handle a BSG timeout 1698 * @job: struct fc_bsg_job that timed out 1699 * 1700 * Returns: 1701 * 0 on success / other on failure 1702 **/ 1703 static int ibmvfc_bsg_timeout(struct fc_bsg_job *job) 1704 { 1705 struct ibmvfc_host *vhost = shost_priv(job->shost); 1706 unsigned long port_id = (unsigned long)job->dd_data; 1707 struct ibmvfc_event *evt; 1708 struct ibmvfc_tmf *tmf; 1709 unsigned long flags; 1710 int rc; 1711 1712 ENTER; 1713 spin_lock_irqsave(vhost->host->host_lock, flags); 1714 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 1715 __ibmvfc_reset_host(vhost); 1716 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1717 return 0; 1718 } 1719 1720 vhost->aborting_passthru = 1; 1721 evt = ibmvfc_get_event(vhost); 1722 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 1723 1724 tmf = &evt->iu.tmf; 1725 memset(tmf, 0, sizeof(*tmf)); 1726 tmf->common.version = cpu_to_be32(1); 1727 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 1728 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 1729 tmf->scsi_id = cpu_to_be64(port_id); 1730 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 1731 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); 1732 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1733 1734 if (rc != 0) { 1735 vhost->aborting_passthru = 0; 1736 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 1737 rc = -EIO; 1738 } else 1739 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 1740 port_id); 1741 1742 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1743 1744 LEAVE; 1745 return rc; 1746 } 1747 1748 /** 1749 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 1750 * @vhost: struct ibmvfc_host to send command 1751 * @port_id: port ID to send command 1752 * 1753 * Returns: 1754 * 0 on success / other on failure 1755 **/ 1756 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 1757 { 1758 struct ibmvfc_port_login *plogi; 1759 struct ibmvfc_target *tgt; 1760 struct ibmvfc_event *evt; 1761 union ibmvfc_iu rsp_iu; 1762 unsigned long flags; 1763 int rc = 0, issue_login = 1; 1764 1765 ENTER; 1766 spin_lock_irqsave(vhost->host->host_lock, flags); 1767 list_for_each_entry(tgt, &vhost->targets, queue) { 1768 if (tgt->scsi_id == port_id) { 1769 issue_login = 0; 1770 break; 1771 } 1772 } 1773 1774 if (!issue_login) 1775 goto unlock_out; 1776 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 1777 goto unlock_out; 1778 1779 evt = ibmvfc_get_event(vhost); 1780 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1781 plogi = &evt->iu.plogi; 1782 memset(plogi, 0, sizeof(*plogi)); 1783 plogi->common.version = cpu_to_be32(1); 1784 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 1785 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 1786 plogi->scsi_id = cpu_to_be64(port_id); 1787 evt->sync_iu = &rsp_iu; 1788 init_completion(&evt->comp); 1789 1790 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1791 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1792 1793 if (rc) 1794 return -EIO; 1795 1796 wait_for_completion(&evt->comp); 1797 1798 if (rsp_iu.plogi.common.status) 1799 rc = -EIO; 1800 1801 spin_lock_irqsave(vhost->host->host_lock, flags); 1802 ibmvfc_free_event(evt); 1803 unlock_out: 1804 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1805 LEAVE; 1806 return rc; 1807 } 1808 1809 /** 1810 * ibmvfc_bsg_request - Handle a BSG request 1811 * @job: struct fc_bsg_job to be executed 1812 * 1813 * Returns: 1814 * 0 on success / other on failure 1815 **/ 1816 static int ibmvfc_bsg_request(struct fc_bsg_job *job) 1817 { 1818 struct ibmvfc_host *vhost = shost_priv(job->shost); 1819 struct fc_rport *rport = job->rport; 1820 struct ibmvfc_passthru_mad *mad; 1821 struct ibmvfc_event *evt; 1822 union ibmvfc_iu rsp_iu; 1823 unsigned long flags, port_id = -1; 1824 unsigned int code = job->request->msgcode; 1825 int rc = 0, req_seg, rsp_seg, issue_login = 0; 1826 u32 fc_flags, rsp_len; 1827 1828 ENTER; 1829 job->reply->reply_payload_rcv_len = 0; 1830 if (rport) 1831 port_id = rport->port_id; 1832 1833 switch (code) { 1834 case FC_BSG_HST_ELS_NOLOGIN: 1835 port_id = (job->request->rqst_data.h_els.port_id[0] << 16) | 1836 (job->request->rqst_data.h_els.port_id[1] << 8) | 1837 job->request->rqst_data.h_els.port_id[2]; 1838 case FC_BSG_RPT_ELS: 1839 fc_flags = IBMVFC_FC_ELS; 1840 break; 1841 case FC_BSG_HST_CT: 1842 issue_login = 1; 1843 port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) | 1844 (job->request->rqst_data.h_ct.port_id[1] << 8) | 1845 job->request->rqst_data.h_ct.port_id[2]; 1846 case FC_BSG_RPT_CT: 1847 fc_flags = IBMVFC_FC_CT_IU; 1848 break; 1849 default: 1850 return -ENOTSUPP; 1851 }; 1852 1853 if (port_id == -1) 1854 return -EINVAL; 1855 if (!mutex_trylock(&vhost->passthru_mutex)) 1856 return -EBUSY; 1857 1858 job->dd_data = (void *)port_id; 1859 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 1860 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1861 1862 if (!req_seg) { 1863 mutex_unlock(&vhost->passthru_mutex); 1864 return -ENOMEM; 1865 } 1866 1867 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 1868 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1869 1870 if (!rsp_seg) { 1871 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1872 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1873 mutex_unlock(&vhost->passthru_mutex); 1874 return -ENOMEM; 1875 } 1876 1877 if (req_seg > 1 || rsp_seg > 1) { 1878 rc = -EINVAL; 1879 goto out; 1880 } 1881 1882 if (issue_login) 1883 rc = ibmvfc_bsg_plogi(vhost, port_id); 1884 1885 spin_lock_irqsave(vhost->host->host_lock, flags); 1886 1887 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 1888 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1889 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1890 goto out; 1891 } 1892 1893 evt = ibmvfc_get_event(vhost); 1894 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1895 mad = &evt->iu.passthru; 1896 1897 memset(mad, 0, sizeof(*mad)); 1898 mad->common.version = cpu_to_be32(1); 1899 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 1900 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 1901 1902 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + 1903 offsetof(struct ibmvfc_passthru_mad, iu)); 1904 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 1905 1906 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); 1907 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); 1908 mad->iu.flags = cpu_to_be32(fc_flags); 1909 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 1910 1911 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); 1912 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); 1913 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); 1914 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); 1915 mad->iu.scsi_id = cpu_to_be64(port_id); 1916 mad->iu.tag = cpu_to_be64((u64)evt); 1917 rsp_len = be32_to_cpu(mad->iu.rsp.len); 1918 1919 evt->sync_iu = &rsp_iu; 1920 init_completion(&evt->comp); 1921 rc = ibmvfc_send_event(evt, vhost, 0); 1922 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1923 1924 if (rc) { 1925 rc = -EIO; 1926 goto out; 1927 } 1928 1929 wait_for_completion(&evt->comp); 1930 1931 if (rsp_iu.passthru.common.status) 1932 rc = -EIO; 1933 else 1934 job->reply->reply_payload_rcv_len = rsp_len; 1935 1936 spin_lock_irqsave(vhost->host->host_lock, flags); 1937 ibmvfc_free_event(evt); 1938 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1939 job->reply->result = rc; 1940 job->job_done(job); 1941 rc = 0; 1942 out: 1943 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1944 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1945 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 1946 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1947 mutex_unlock(&vhost->passthru_mutex); 1948 LEAVE; 1949 return rc; 1950 } 1951 1952 /** 1953 * ibmvfc_reset_device - Reset the device with the specified reset type 1954 * @sdev: scsi device to reset 1955 * @type: reset type 1956 * @desc: reset type description for log messages 1957 * 1958 * Returns: 1959 * 0 on success / other on failure 1960 **/ 1961 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1962 { 1963 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1964 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1965 struct ibmvfc_cmd *tmf; 1966 struct ibmvfc_event *evt = NULL; 1967 union ibmvfc_iu rsp_iu; 1968 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1969 int rsp_rc = -EBUSY; 1970 unsigned long flags; 1971 int rsp_code = 0; 1972 1973 spin_lock_irqsave(vhost->host->host_lock, flags); 1974 if (vhost->state == IBMVFC_ACTIVE) { 1975 evt = ibmvfc_get_event(vhost); 1976 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1977 1978 tmf = &evt->iu.cmd; 1979 memset(tmf, 0, sizeof(*tmf)); 1980 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 1981 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); 1982 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1983 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); 1984 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); 1985 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 1986 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); 1987 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1988 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 1989 tmf->iu.tmf_flags = type; 1990 evt->sync_iu = &rsp_iu; 1991 1992 init_completion(&evt->comp); 1993 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1994 } 1995 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1996 1997 if (rsp_rc != 0) { 1998 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 1999 desc, rsp_rc); 2000 return -EIO; 2001 } 2002 2003 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2004 wait_for_completion(&evt->comp); 2005 2006 if (rsp_iu.cmd.status) 2007 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2008 2009 if (rsp_code) { 2010 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2011 rsp_code = fc_rsp->data.info.rsp_code; 2012 2013 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2014 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, 2015 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2016 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2017 fc_rsp->scsi_status); 2018 rsp_rc = -EIO; 2019 } else 2020 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2021 2022 spin_lock_irqsave(vhost->host->host_lock, flags); 2023 ibmvfc_free_event(evt); 2024 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2025 return rsp_rc; 2026 } 2027 2028 /** 2029 * ibmvfc_match_rport - Match function for specified remote port 2030 * @evt: ibmvfc event struct 2031 * @device: device to match (rport) 2032 * 2033 * Returns: 2034 * 1 if event matches rport / 0 if event does not match rport 2035 **/ 2036 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2037 { 2038 struct fc_rport *cmd_rport; 2039 2040 if (evt->cmnd) { 2041 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2042 if (cmd_rport == rport) 2043 return 1; 2044 } 2045 return 0; 2046 } 2047 2048 /** 2049 * ibmvfc_match_target - Match function for specified target 2050 * @evt: ibmvfc event struct 2051 * @device: device to match (starget) 2052 * 2053 * Returns: 2054 * 1 if event matches starget / 0 if event does not match starget 2055 **/ 2056 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2057 { 2058 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2059 return 1; 2060 return 0; 2061 } 2062 2063 /** 2064 * ibmvfc_match_lun - Match function for specified LUN 2065 * @evt: ibmvfc event struct 2066 * @device: device to match (sdev) 2067 * 2068 * Returns: 2069 * 1 if event matches sdev / 0 if event does not match sdev 2070 **/ 2071 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2072 { 2073 if (evt->cmnd && evt->cmnd->device == device) 2074 return 1; 2075 return 0; 2076 } 2077 2078 /** 2079 * ibmvfc_wait_for_ops - Wait for ops to complete 2080 * @vhost: ibmvfc host struct 2081 * @device: device to match (starget or sdev) 2082 * @match: match function 2083 * 2084 * Returns: 2085 * SUCCESS / FAILED 2086 **/ 2087 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2088 int (*match) (struct ibmvfc_event *, void *)) 2089 { 2090 struct ibmvfc_event *evt; 2091 DECLARE_COMPLETION_ONSTACK(comp); 2092 int wait; 2093 unsigned long flags; 2094 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2095 2096 ENTER; 2097 do { 2098 wait = 0; 2099 spin_lock_irqsave(vhost->host->host_lock, flags); 2100 list_for_each_entry(evt, &vhost->sent, queue) { 2101 if (match(evt, device)) { 2102 evt->eh_comp = ∁ 2103 wait++; 2104 } 2105 } 2106 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2107 2108 if (wait) { 2109 timeout = wait_for_completion_timeout(&comp, timeout); 2110 2111 if (!timeout) { 2112 wait = 0; 2113 spin_lock_irqsave(vhost->host->host_lock, flags); 2114 list_for_each_entry(evt, &vhost->sent, queue) { 2115 if (match(evt, device)) { 2116 evt->eh_comp = NULL; 2117 wait++; 2118 } 2119 } 2120 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2121 if (wait) 2122 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2123 LEAVE; 2124 return wait ? FAILED : SUCCESS; 2125 } 2126 } 2127 } while (wait); 2128 2129 LEAVE; 2130 return SUCCESS; 2131 } 2132 2133 /** 2134 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2135 * @sdev: scsi device to cancel commands 2136 * @type: type of error recovery being performed 2137 * 2138 * This sends a cancel to the VIOS for the specified device. This does 2139 * NOT send any abort to the actual device. That must be done separately. 2140 * 2141 * Returns: 2142 * 0 on success / other on failure 2143 **/ 2144 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2145 { 2146 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2147 struct scsi_target *starget = scsi_target(sdev); 2148 struct fc_rport *rport = starget_to_rport(starget); 2149 struct ibmvfc_tmf *tmf; 2150 struct ibmvfc_event *evt, *found_evt; 2151 union ibmvfc_iu rsp; 2152 int rsp_rc = -EBUSY; 2153 unsigned long flags; 2154 u16 status; 2155 2156 ENTER; 2157 spin_lock_irqsave(vhost->host->host_lock, flags); 2158 found_evt = NULL; 2159 list_for_each_entry(evt, &vhost->sent, queue) { 2160 if (evt->cmnd && evt->cmnd->device == sdev) { 2161 found_evt = evt; 2162 break; 2163 } 2164 } 2165 2166 if (!found_evt) { 2167 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2168 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2169 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2170 return 0; 2171 } 2172 2173 if (vhost->logged_in) { 2174 evt = ibmvfc_get_event(vhost); 2175 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2176 2177 tmf = &evt->iu.tmf; 2178 memset(tmf, 0, sizeof(*tmf)); 2179 tmf->common.version = cpu_to_be32(1); 2180 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2181 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2182 tmf->scsi_id = cpu_to_be64(rport->port_id); 2183 int_to_scsilun(sdev->lun, &tmf->lun); 2184 if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS)) 2185 type &= ~IBMVFC_TMF_SUPPRESS_ABTS; 2186 if (vhost->state == IBMVFC_ACTIVE) 2187 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); 2188 else 2189 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); 2190 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2191 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); 2192 2193 evt->sync_iu = &rsp; 2194 init_completion(&evt->comp); 2195 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2196 } 2197 2198 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2199 2200 if (rsp_rc != 0) { 2201 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2202 /* If failure is received, the host adapter is most likely going 2203 through reset, return success so the caller will wait for the command 2204 being cancelled to get returned */ 2205 return 0; 2206 } 2207 2208 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2209 2210 wait_for_completion(&evt->comp); 2211 status = be16_to_cpu(rsp.mad_common.status); 2212 spin_lock_irqsave(vhost->host->host_lock, flags); 2213 ibmvfc_free_event(evt); 2214 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2215 2216 if (status != IBMVFC_MAD_SUCCESS) { 2217 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2218 switch (status) { 2219 case IBMVFC_MAD_DRIVER_FAILED: 2220 case IBMVFC_MAD_CRQ_ERROR: 2221 /* Host adapter most likely going through reset, return success to 2222 the caller will wait for the command being cancelled to get returned */ 2223 return 0; 2224 default: 2225 return -EIO; 2226 }; 2227 } 2228 2229 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2230 return 0; 2231 } 2232 2233 /** 2234 * ibmvfc_match_key - Match function for specified cancel key 2235 * @evt: ibmvfc event struct 2236 * @key: cancel key to match 2237 * 2238 * Returns: 2239 * 1 if event matches key / 0 if event does not match key 2240 **/ 2241 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2242 { 2243 unsigned long cancel_key = (unsigned long)key; 2244 2245 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2246 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) 2247 return 1; 2248 return 0; 2249 } 2250 2251 /** 2252 * ibmvfc_match_evt - Match function for specified event 2253 * @evt: ibmvfc event struct 2254 * @match: event to match 2255 * 2256 * Returns: 2257 * 1 if event matches key / 0 if event does not match key 2258 **/ 2259 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) 2260 { 2261 if (evt == match) 2262 return 1; 2263 return 0; 2264 } 2265 2266 /** 2267 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2268 * @sdev: scsi device to abort commands 2269 * 2270 * This sends an Abort Task Set to the VIOS for the specified device. This does 2271 * NOT send any cancel to the VIOS. That must be done separately. 2272 * 2273 * Returns: 2274 * 0 on success / other on failure 2275 **/ 2276 static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2277 { 2278 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2279 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2280 struct ibmvfc_cmd *tmf; 2281 struct ibmvfc_event *evt, *found_evt; 2282 union ibmvfc_iu rsp_iu; 2283 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 2284 int rc, rsp_rc = -EBUSY; 2285 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2286 int rsp_code = 0; 2287 2288 spin_lock_irqsave(vhost->host->host_lock, flags); 2289 found_evt = NULL; 2290 list_for_each_entry(evt, &vhost->sent, queue) { 2291 if (evt->cmnd && evt->cmnd->device == sdev) { 2292 found_evt = evt; 2293 break; 2294 } 2295 } 2296 2297 if (!found_evt) { 2298 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2299 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2300 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2301 return 0; 2302 } 2303 2304 if (vhost->state == IBMVFC_ACTIVE) { 2305 evt = ibmvfc_get_event(vhost); 2306 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2307 2308 tmf = &evt->iu.cmd; 2309 memset(tmf, 0, sizeof(*tmf)); 2310 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 2311 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); 2312 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 2313 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); 2314 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); 2315 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2316 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); 2317 int_to_scsilun(sdev->lun, &tmf->iu.lun); 2318 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2319 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 2320 evt->sync_iu = &rsp_iu; 2321 2322 init_completion(&evt->comp); 2323 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2324 } 2325 2326 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2327 2328 if (rsp_rc != 0) { 2329 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2330 return -EIO; 2331 } 2332 2333 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2334 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2335 2336 if (!timeout) { 2337 rc = ibmvfc_cancel_all(sdev, 0); 2338 if (!rc) { 2339 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2340 if (rc == SUCCESS) 2341 rc = 0; 2342 } 2343 2344 if (rc) { 2345 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2346 ibmvfc_reset_host(vhost); 2347 rsp_rc = -EIO; 2348 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2349 2350 if (rc == SUCCESS) 2351 rsp_rc = 0; 2352 2353 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); 2354 if (rc != SUCCESS) { 2355 spin_lock_irqsave(vhost->host->host_lock, flags); 2356 ibmvfc_hard_reset_host(vhost); 2357 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2358 rsp_rc = 0; 2359 } 2360 2361 goto out; 2362 } 2363 } 2364 2365 if (rsp_iu.cmd.status) 2366 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2367 2368 if (rsp_code) { 2369 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2370 rsp_code = fc_rsp->data.info.rsp_code; 2371 2372 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2373 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2374 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2375 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2376 fc_rsp->scsi_status); 2377 rsp_rc = -EIO; 2378 } else 2379 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2380 2381 out: 2382 spin_lock_irqsave(vhost->host->host_lock, flags); 2383 ibmvfc_free_event(evt); 2384 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2385 return rsp_rc; 2386 } 2387 2388 /** 2389 * ibmvfc_eh_abort_handler - Abort a command 2390 * @cmd: scsi command to abort 2391 * 2392 * Returns: 2393 * SUCCESS / FAST_IO_FAIL / FAILED 2394 **/ 2395 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2396 { 2397 struct scsi_device *sdev = cmd->device; 2398 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2399 int cancel_rc, block_rc; 2400 int rc = FAILED; 2401 2402 ENTER; 2403 block_rc = fc_block_scsi_eh(cmd); 2404 ibmvfc_wait_while_resetting(vhost); 2405 if (block_rc != FAST_IO_FAIL) { 2406 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2407 ibmvfc_abort_task_set(sdev); 2408 } else 2409 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2410 2411 if (!cancel_rc) 2412 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2413 2414 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2415 rc = FAST_IO_FAIL; 2416 2417 LEAVE; 2418 return rc; 2419 } 2420 2421 /** 2422 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2423 * @cmd: scsi command struct 2424 * 2425 * Returns: 2426 * SUCCESS / FAST_IO_FAIL / FAILED 2427 **/ 2428 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2429 { 2430 struct scsi_device *sdev = cmd->device; 2431 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2432 int cancel_rc, block_rc, reset_rc = 0; 2433 int rc = FAILED; 2434 2435 ENTER; 2436 block_rc = fc_block_scsi_eh(cmd); 2437 ibmvfc_wait_while_resetting(vhost); 2438 if (block_rc != FAST_IO_FAIL) { 2439 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2440 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2441 } else 2442 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2443 2444 if (!cancel_rc && !reset_rc) 2445 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2446 2447 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2448 rc = FAST_IO_FAIL; 2449 2450 LEAVE; 2451 return rc; 2452 } 2453 2454 /** 2455 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function 2456 * @sdev: scsi device struct 2457 * @data: return code 2458 * 2459 **/ 2460 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) 2461 { 2462 unsigned long *rc = data; 2463 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2464 } 2465 2466 /** 2467 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2468 * @sdev: scsi device struct 2469 * @data: return code 2470 * 2471 **/ 2472 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2473 { 2474 unsigned long *rc = data; 2475 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2476 } 2477 2478 /** 2479 * ibmvfc_eh_target_reset_handler - Reset the target 2480 * @cmd: scsi command struct 2481 * 2482 * Returns: 2483 * SUCCESS / FAST_IO_FAIL / FAILED 2484 **/ 2485 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2486 { 2487 struct scsi_device *sdev = cmd->device; 2488 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2489 struct scsi_target *starget = scsi_target(sdev); 2490 int block_rc; 2491 int reset_rc = 0; 2492 int rc = FAILED; 2493 unsigned long cancel_rc = 0; 2494 2495 ENTER; 2496 block_rc = fc_block_scsi_eh(cmd); 2497 ibmvfc_wait_while_resetting(vhost); 2498 if (block_rc != FAST_IO_FAIL) { 2499 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2500 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2501 } else 2502 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); 2503 2504 if (!cancel_rc && !reset_rc) 2505 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2506 2507 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2508 rc = FAST_IO_FAIL; 2509 2510 LEAVE; 2511 return rc; 2512 } 2513 2514 /** 2515 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2516 * @cmd: struct scsi_cmnd having problems 2517 * 2518 **/ 2519 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2520 { 2521 int rc, block_rc; 2522 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2523 2524 block_rc = fc_block_scsi_eh(cmd); 2525 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2526 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2527 2528 if (block_rc == FAST_IO_FAIL) 2529 return FAST_IO_FAIL; 2530 2531 return rc ? FAILED : SUCCESS; 2532 } 2533 2534 /** 2535 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2536 * @rport: rport struct 2537 * 2538 * Return value: 2539 * none 2540 **/ 2541 static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2542 { 2543 struct Scsi_Host *shost = rport_to_shost(rport); 2544 struct ibmvfc_host *vhost = shost_priv(shost); 2545 struct fc_rport *dev_rport; 2546 struct scsi_device *sdev; 2547 unsigned long rc; 2548 2549 ENTER; 2550 shost_for_each_device(sdev, shost) { 2551 dev_rport = starget_to_rport(scsi_target(sdev)); 2552 if (dev_rport != rport) 2553 continue; 2554 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2555 } 2556 2557 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 2558 2559 if (rc == FAILED) 2560 ibmvfc_issue_fc_host_lip(shost); 2561 LEAVE; 2562 } 2563 2564 static const struct ibmvfc_async_desc ae_desc [] = { 2565 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2566 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2567 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2568 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2569 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2570 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, 2571 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, 2572 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, 2573 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, 2574 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, 2575 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, 2576 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, 2577 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, 2578 }; 2579 2580 static const struct ibmvfc_async_desc unknown_ae = { 2581 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL 2582 }; 2583 2584 /** 2585 * ibmvfc_get_ae_desc - Get text description for async event 2586 * @ae: async event 2587 * 2588 **/ 2589 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 2590 { 2591 int i; 2592 2593 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2594 if (ae_desc[i].ae == ae) 2595 return &ae_desc[i]; 2596 2597 return &unknown_ae; 2598 } 2599 2600 static const struct { 2601 enum ibmvfc_ae_link_state state; 2602 const char *desc; 2603 } link_desc [] = { 2604 { IBMVFC_AE_LS_LINK_UP, " link up" }, 2605 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 2606 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 2607 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 2608 }; 2609 2610 /** 2611 * ibmvfc_get_link_state - Get text description for link state 2612 * @state: link state 2613 * 2614 **/ 2615 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 2616 { 2617 int i; 2618 2619 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 2620 if (link_desc[i].state == state) 2621 return link_desc[i].desc; 2622 2623 return ""; 2624 } 2625 2626 /** 2627 * ibmvfc_handle_async - Handle an async event from the adapter 2628 * @crq: crq to process 2629 * @vhost: ibmvfc host struct 2630 * 2631 **/ 2632 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2633 struct ibmvfc_host *vhost) 2634 { 2635 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); 2636 struct ibmvfc_target *tgt; 2637 2638 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 2639 " node_name: %llx%s\n", desc->desc, crq->scsi_id, crq->wwpn, crq->node_name, 2640 ibmvfc_get_link_state(crq->link_state)); 2641 2642 switch (be64_to_cpu(crq->event)) { 2643 case IBMVFC_AE_RESUME: 2644 switch (crq->link_state) { 2645 case IBMVFC_AE_LS_LINK_DOWN: 2646 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2647 break; 2648 case IBMVFC_AE_LS_LINK_DEAD: 2649 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2650 break; 2651 case IBMVFC_AE_LS_LINK_UP: 2652 case IBMVFC_AE_LS_LINK_BOUNCED: 2653 default: 2654 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2655 vhost->delay_init = 1; 2656 __ibmvfc_reset_host(vhost); 2657 break; 2658 }; 2659 2660 break; 2661 case IBMVFC_AE_LINK_UP: 2662 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2663 vhost->delay_init = 1; 2664 __ibmvfc_reset_host(vhost); 2665 break; 2666 case IBMVFC_AE_SCN_FABRIC: 2667 case IBMVFC_AE_SCN_DOMAIN: 2668 vhost->events_to_log |= IBMVFC_AE_RSCN; 2669 if (vhost->state < IBMVFC_HALTED) { 2670 vhost->delay_init = 1; 2671 __ibmvfc_reset_host(vhost); 2672 } 2673 break; 2674 case IBMVFC_AE_SCN_NPORT: 2675 case IBMVFC_AE_SCN_GROUP: 2676 vhost->events_to_log |= IBMVFC_AE_RSCN; 2677 ibmvfc_reinit_host(vhost); 2678 break; 2679 case IBMVFC_AE_ELS_LOGO: 2680 case IBMVFC_AE_ELS_PRLO: 2681 case IBMVFC_AE_ELS_PLOGI: 2682 list_for_each_entry(tgt, &vhost->targets, queue) { 2683 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 2684 break; 2685 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) 2686 continue; 2687 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) 2688 continue; 2689 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) 2690 continue; 2691 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) 2692 tgt->logo_rcvd = 1; 2693 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { 2694 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2695 ibmvfc_reinit_host(vhost); 2696 } 2697 } 2698 break; 2699 case IBMVFC_AE_LINK_DOWN: 2700 case IBMVFC_AE_ADAPTER_FAILED: 2701 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2702 break; 2703 case IBMVFC_AE_LINK_DEAD: 2704 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2705 break; 2706 case IBMVFC_AE_HALT: 2707 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2708 break; 2709 default: 2710 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2711 break; 2712 }; 2713 } 2714 2715 /** 2716 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2717 * @crq: Command/Response queue 2718 * @vhost: ibmvfc host struct 2719 * 2720 **/ 2721 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2722 { 2723 long rc; 2724 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 2725 2726 switch (crq->valid) { 2727 case IBMVFC_CRQ_INIT_RSP: 2728 switch (crq->format) { 2729 case IBMVFC_CRQ_INIT: 2730 dev_info(vhost->dev, "Partner initialized\n"); 2731 /* Send back a response */ 2732 rc = ibmvfc_send_crq_init_complete(vhost); 2733 if (rc == 0) 2734 ibmvfc_init_host(vhost); 2735 else 2736 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2737 break; 2738 case IBMVFC_CRQ_INIT_COMPLETE: 2739 dev_info(vhost->dev, "Partner initialization complete\n"); 2740 ibmvfc_init_host(vhost); 2741 break; 2742 default: 2743 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2744 } 2745 return; 2746 case IBMVFC_CRQ_XPORT_EVENT: 2747 vhost->state = IBMVFC_NO_CRQ; 2748 vhost->logged_in = 0; 2749 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2750 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2751 /* We need to re-setup the interpartition connection */ 2752 dev_info(vhost->dev, "Re-enabling adapter\n"); 2753 vhost->client_migrated = 1; 2754 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2755 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2756 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 2757 } else { 2758 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2759 ibmvfc_purge_requests(vhost, DID_ERROR); 2760 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2761 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 2762 } 2763 return; 2764 case IBMVFC_CRQ_CMD_RSP: 2765 break; 2766 default: 2767 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2768 return; 2769 } 2770 2771 if (crq->format == IBMVFC_ASYNC_EVENT) 2772 return; 2773 2774 /* The only kind of payload CRQs we should get are responses to 2775 * things we send. Make sure this response is to something we 2776 * actually sent 2777 */ 2778 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2779 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2780 crq->ioba); 2781 return; 2782 } 2783 2784 if (unlikely(atomic_read(&evt->free))) { 2785 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2786 crq->ioba); 2787 return; 2788 } 2789 2790 del_timer(&evt->timer); 2791 list_del(&evt->queue); 2792 ibmvfc_trc_end(evt); 2793 evt->done(evt); 2794 } 2795 2796 /** 2797 * ibmvfc_scan_finished - Check if the device scan is done. 2798 * @shost: scsi host struct 2799 * @time: current elapsed time 2800 * 2801 * Returns: 2802 * 0 if scan is not done / 1 if scan is done 2803 **/ 2804 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2805 { 2806 unsigned long flags; 2807 struct ibmvfc_host *vhost = shost_priv(shost); 2808 int done = 0; 2809 2810 spin_lock_irqsave(shost->host_lock, flags); 2811 if (time >= (init_timeout * HZ)) { 2812 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2813 "continuing initialization\n", init_timeout); 2814 done = 1; 2815 } 2816 2817 if (vhost->scan_complete) 2818 done = 1; 2819 spin_unlock_irqrestore(shost->host_lock, flags); 2820 return done; 2821 } 2822 2823 /** 2824 * ibmvfc_slave_alloc - Setup the device's task set value 2825 * @sdev: struct scsi_device device to configure 2826 * 2827 * Set the device's task set value so that error handling works as 2828 * expected. 2829 * 2830 * Returns: 2831 * 0 on success / -ENXIO if device does not exist 2832 **/ 2833 static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2834 { 2835 struct Scsi_Host *shost = sdev->host; 2836 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2837 struct ibmvfc_host *vhost = shost_priv(shost); 2838 unsigned long flags = 0; 2839 2840 if (!rport || fc_remote_port_chkready(rport)) 2841 return -ENXIO; 2842 2843 spin_lock_irqsave(shost->host_lock, flags); 2844 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2845 spin_unlock_irqrestore(shost->host_lock, flags); 2846 return 0; 2847 } 2848 2849 /** 2850 * ibmvfc_target_alloc - Setup the target's task set value 2851 * @starget: struct scsi_target 2852 * 2853 * Set the target's task set value so that error handling works as 2854 * expected. 2855 * 2856 * Returns: 2857 * 0 on success / -ENXIO if device does not exist 2858 **/ 2859 static int ibmvfc_target_alloc(struct scsi_target *starget) 2860 { 2861 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2862 struct ibmvfc_host *vhost = shost_priv(shost); 2863 unsigned long flags = 0; 2864 2865 spin_lock_irqsave(shost->host_lock, flags); 2866 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2867 spin_unlock_irqrestore(shost->host_lock, flags); 2868 return 0; 2869 } 2870 2871 /** 2872 * ibmvfc_slave_configure - Configure the device 2873 * @sdev: struct scsi_device device to configure 2874 * 2875 * Enable allow_restart for a device if it is a disk. Adjust the 2876 * queue_depth here also. 2877 * 2878 * Returns: 2879 * 0 2880 **/ 2881 static int ibmvfc_slave_configure(struct scsi_device *sdev) 2882 { 2883 struct Scsi_Host *shost = sdev->host; 2884 unsigned long flags = 0; 2885 2886 spin_lock_irqsave(shost->host_lock, flags); 2887 if (sdev->type == TYPE_DISK) 2888 sdev->allow_restart = 1; 2889 spin_unlock_irqrestore(shost->host_lock, flags); 2890 return 0; 2891 } 2892 2893 /** 2894 * ibmvfc_change_queue_depth - Change the device's queue depth 2895 * @sdev: scsi device struct 2896 * @qdepth: depth to set 2897 * @reason: calling context 2898 * 2899 * Return value: 2900 * actual depth set 2901 **/ 2902 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 2903 { 2904 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2905 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2906 2907 return scsi_change_queue_depth(sdev, qdepth); 2908 } 2909 2910 static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2911 struct device_attribute *attr, char *buf) 2912 { 2913 struct Scsi_Host *shost = class_to_shost(dev); 2914 struct ibmvfc_host *vhost = shost_priv(shost); 2915 2916 return snprintf(buf, PAGE_SIZE, "%s\n", 2917 vhost->login_buf->resp.partition_name); 2918 } 2919 2920 static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2921 struct device_attribute *attr, char *buf) 2922 { 2923 struct Scsi_Host *shost = class_to_shost(dev); 2924 struct ibmvfc_host *vhost = shost_priv(shost); 2925 2926 return snprintf(buf, PAGE_SIZE, "%s\n", 2927 vhost->login_buf->resp.device_name); 2928 } 2929 2930 static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2931 struct device_attribute *attr, char *buf) 2932 { 2933 struct Scsi_Host *shost = class_to_shost(dev); 2934 struct ibmvfc_host *vhost = shost_priv(shost); 2935 2936 return snprintf(buf, PAGE_SIZE, "%s\n", 2937 vhost->login_buf->resp.port_loc_code); 2938 } 2939 2940 static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2941 struct device_attribute *attr, char *buf) 2942 { 2943 struct Scsi_Host *shost = class_to_shost(dev); 2944 struct ibmvfc_host *vhost = shost_priv(shost); 2945 2946 return snprintf(buf, PAGE_SIZE, "%s\n", 2947 vhost->login_buf->resp.drc_name); 2948 } 2949 2950 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2951 struct device_attribute *attr, char *buf) 2952 { 2953 struct Scsi_Host *shost = class_to_shost(dev); 2954 struct ibmvfc_host *vhost = shost_priv(shost); 2955 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2956 } 2957 2958 static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 2959 struct device_attribute *attr, char *buf) 2960 { 2961 struct Scsi_Host *shost = class_to_shost(dev); 2962 struct ibmvfc_host *vhost = shost_priv(shost); 2963 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); 2964 } 2965 2966 /** 2967 * ibmvfc_show_log_level - Show the adapter's error logging level 2968 * @dev: class device struct 2969 * @buf: buffer 2970 * 2971 * Return value: 2972 * number of bytes printed to buffer 2973 **/ 2974 static ssize_t ibmvfc_show_log_level(struct device *dev, 2975 struct device_attribute *attr, char *buf) 2976 { 2977 struct Scsi_Host *shost = class_to_shost(dev); 2978 struct ibmvfc_host *vhost = shost_priv(shost); 2979 unsigned long flags = 0; 2980 int len; 2981 2982 spin_lock_irqsave(shost->host_lock, flags); 2983 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2984 spin_unlock_irqrestore(shost->host_lock, flags); 2985 return len; 2986 } 2987 2988 /** 2989 * ibmvfc_store_log_level - Change the adapter's error logging level 2990 * @dev: class device struct 2991 * @buf: buffer 2992 * 2993 * Return value: 2994 * number of bytes printed to buffer 2995 **/ 2996 static ssize_t ibmvfc_store_log_level(struct device *dev, 2997 struct device_attribute *attr, 2998 const char *buf, size_t count) 2999 { 3000 struct Scsi_Host *shost = class_to_shost(dev); 3001 struct ibmvfc_host *vhost = shost_priv(shost); 3002 unsigned long flags = 0; 3003 3004 spin_lock_irqsave(shost->host_lock, flags); 3005 vhost->log_level = simple_strtoul(buf, NULL, 10); 3006 spin_unlock_irqrestore(shost->host_lock, flags); 3007 return strlen(buf); 3008 } 3009 3010 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 3011 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 3012 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 3013 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 3014 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 3015 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 3016 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 3017 ibmvfc_show_log_level, ibmvfc_store_log_level); 3018 3019 #ifdef CONFIG_SCSI_IBMVFC_TRACE 3020 /** 3021 * ibmvfc_read_trace - Dump the adapter trace 3022 * @filp: open sysfs file 3023 * @kobj: kobject struct 3024 * @bin_attr: bin_attribute struct 3025 * @buf: buffer 3026 * @off: offset 3027 * @count: buffer size 3028 * 3029 * Return value: 3030 * number of bytes printed to buffer 3031 **/ 3032 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 3033 struct bin_attribute *bin_attr, 3034 char *buf, loff_t off, size_t count) 3035 { 3036 struct device *dev = container_of(kobj, struct device, kobj); 3037 struct Scsi_Host *shost = class_to_shost(dev); 3038 struct ibmvfc_host *vhost = shost_priv(shost); 3039 unsigned long flags = 0; 3040 int size = IBMVFC_TRACE_SIZE; 3041 char *src = (char *)vhost->trace; 3042 3043 if (off > size) 3044 return 0; 3045 if (off + count > size) { 3046 size -= off; 3047 count = size; 3048 } 3049 3050 spin_lock_irqsave(shost->host_lock, flags); 3051 memcpy(buf, &src[off], count); 3052 spin_unlock_irqrestore(shost->host_lock, flags); 3053 return count; 3054 } 3055 3056 static struct bin_attribute ibmvfc_trace_attr = { 3057 .attr = { 3058 .name = "trace", 3059 .mode = S_IRUGO, 3060 }, 3061 .size = 0, 3062 .read = ibmvfc_read_trace, 3063 }; 3064 #endif 3065 3066 static struct device_attribute *ibmvfc_attrs[] = { 3067 &dev_attr_partition_name, 3068 &dev_attr_device_name, 3069 &dev_attr_port_loc_code, 3070 &dev_attr_drc_name, 3071 &dev_attr_npiv_version, 3072 &dev_attr_capabilities, 3073 &dev_attr_log_level, 3074 NULL 3075 }; 3076 3077 static struct scsi_host_template driver_template = { 3078 .module = THIS_MODULE, 3079 .name = "IBM POWER Virtual FC Adapter", 3080 .proc_name = IBMVFC_NAME, 3081 .queuecommand = ibmvfc_queuecommand, 3082 .eh_abort_handler = ibmvfc_eh_abort_handler, 3083 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3084 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3085 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3086 .slave_alloc = ibmvfc_slave_alloc, 3087 .slave_configure = ibmvfc_slave_configure, 3088 .target_alloc = ibmvfc_target_alloc, 3089 .scan_finished = ibmvfc_scan_finished, 3090 .change_queue_depth = ibmvfc_change_queue_depth, 3091 .cmd_per_lun = 16, 3092 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3093 .this_id = -1, 3094 .sg_tablesize = SG_ALL, 3095 .max_sectors = IBMVFC_MAX_SECTORS, 3096 .use_clustering = ENABLE_CLUSTERING, 3097 .shost_attrs = ibmvfc_attrs, 3098 .use_blk_tags = 1, 3099 .track_queue_depth = 1, 3100 }; 3101 3102 /** 3103 * ibmvfc_next_async_crq - Returns the next entry in async queue 3104 * @vhost: ibmvfc host struct 3105 * 3106 * Returns: 3107 * Pointer to next entry in queue / NULL if empty 3108 **/ 3109 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3110 { 3111 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 3112 struct ibmvfc_async_crq *crq; 3113 3114 crq = &async_crq->msgs[async_crq->cur]; 3115 if (crq->valid & 0x80) { 3116 if (++async_crq->cur == async_crq->size) 3117 async_crq->cur = 0; 3118 rmb(); 3119 } else 3120 crq = NULL; 3121 3122 return crq; 3123 } 3124 3125 /** 3126 * ibmvfc_next_crq - Returns the next entry in message queue 3127 * @vhost: ibmvfc host struct 3128 * 3129 * Returns: 3130 * Pointer to next entry in queue / NULL if empty 3131 **/ 3132 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3133 { 3134 struct ibmvfc_crq_queue *queue = &vhost->crq; 3135 struct ibmvfc_crq *crq; 3136 3137 crq = &queue->msgs[queue->cur]; 3138 if (crq->valid & 0x80) { 3139 if (++queue->cur == queue->size) 3140 queue->cur = 0; 3141 rmb(); 3142 } else 3143 crq = NULL; 3144 3145 return crq; 3146 } 3147 3148 /** 3149 * ibmvfc_interrupt - Interrupt handler 3150 * @irq: number of irq to handle, not used 3151 * @dev_instance: ibmvfc_host that received interrupt 3152 * 3153 * Returns: 3154 * IRQ_HANDLED 3155 **/ 3156 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3157 { 3158 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3159 unsigned long flags; 3160 3161 spin_lock_irqsave(vhost->host->host_lock, flags); 3162 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3163 tasklet_schedule(&vhost->tasklet); 3164 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3165 return IRQ_HANDLED; 3166 } 3167 3168 /** 3169 * ibmvfc_tasklet - Interrupt handler tasklet 3170 * @data: ibmvfc host struct 3171 * 3172 * Returns: 3173 * Nothing 3174 **/ 3175 static void ibmvfc_tasklet(void *data) 3176 { 3177 struct ibmvfc_host *vhost = data; 3178 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3179 struct ibmvfc_crq *crq; 3180 struct ibmvfc_async_crq *async; 3181 unsigned long flags; 3182 int done = 0; 3183 3184 spin_lock_irqsave(vhost->host->host_lock, flags); 3185 while (!done) { 3186 /* Pull all the valid messages off the async CRQ */ 3187 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3188 ibmvfc_handle_async(async, vhost); 3189 async->valid = 0; 3190 wmb(); 3191 } 3192 3193 /* Pull all the valid messages off the CRQ */ 3194 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3195 ibmvfc_handle_crq(crq, vhost); 3196 crq->valid = 0; 3197 wmb(); 3198 } 3199 3200 vio_enable_interrupts(vdev); 3201 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3202 vio_disable_interrupts(vdev); 3203 ibmvfc_handle_async(async, vhost); 3204 async->valid = 0; 3205 wmb(); 3206 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3207 vio_disable_interrupts(vdev); 3208 ibmvfc_handle_crq(crq, vhost); 3209 crq->valid = 0; 3210 wmb(); 3211 } else 3212 done = 1; 3213 } 3214 3215 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3216 } 3217 3218 /** 3219 * ibmvfc_init_tgt - Set the next init job step for the target 3220 * @tgt: ibmvfc target struct 3221 * @job_step: job step to perform 3222 * 3223 **/ 3224 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3225 void (*job_step) (struct ibmvfc_target *)) 3226 { 3227 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 3228 tgt->job_step = job_step; 3229 wake_up(&tgt->vhost->work_wait_q); 3230 } 3231 3232 /** 3233 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3234 * @tgt: ibmvfc target struct 3235 * @job_step: initialization job step 3236 * 3237 * Returns: 1 if step will be retried / 0 if not 3238 * 3239 **/ 3240 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3241 void (*job_step) (struct ibmvfc_target *)) 3242 { 3243 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3244 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3245 wake_up(&tgt->vhost->work_wait_q); 3246 return 0; 3247 } else 3248 ibmvfc_init_tgt(tgt, job_step); 3249 return 1; 3250 } 3251 3252 /* Defined in FC-LS */ 3253 static const struct { 3254 int code; 3255 int retry; 3256 int logged_in; 3257 } prli_rsp [] = { 3258 { 0, 1, 0 }, 3259 { 1, 0, 1 }, 3260 { 2, 1, 0 }, 3261 { 3, 1, 0 }, 3262 { 4, 0, 0 }, 3263 { 5, 0, 0 }, 3264 { 6, 0, 1 }, 3265 { 7, 0, 0 }, 3266 { 8, 1, 0 }, 3267 }; 3268 3269 /** 3270 * ibmvfc_get_prli_rsp - Find PRLI response index 3271 * @flags: PRLI response flags 3272 * 3273 **/ 3274 static int ibmvfc_get_prli_rsp(u16 flags) 3275 { 3276 int i; 3277 int code = (flags & 0x0f00) >> 8; 3278 3279 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3280 if (prli_rsp[i].code == code) 3281 return i; 3282 3283 return 0; 3284 } 3285 3286 /** 3287 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3288 * @evt: ibmvfc event struct 3289 * 3290 **/ 3291 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3292 { 3293 struct ibmvfc_target *tgt = evt->tgt; 3294 struct ibmvfc_host *vhost = evt->vhost; 3295 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3296 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3297 u32 status = be16_to_cpu(rsp->common.status); 3298 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3299 3300 vhost->discovery_threads--; 3301 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3302 switch (status) { 3303 case IBMVFC_MAD_SUCCESS: 3304 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3305 parms->type, parms->flags, parms->service_parms); 3306 3307 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3308 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); 3309 if (prli_rsp[index].logged_in) { 3310 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { 3311 tgt->need_login = 0; 3312 tgt->ids.roles = 0; 3313 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) 3314 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3315 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) 3316 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3317 tgt->add_rport = 1; 3318 } else 3319 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3320 } else if (prli_rsp[index].retry) 3321 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3322 else 3323 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3324 } else 3325 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3326 break; 3327 case IBMVFC_MAD_DRIVER_FAILED: 3328 break; 3329 case IBMVFC_MAD_CRQ_ERROR: 3330 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3331 break; 3332 case IBMVFC_MAD_FAILED: 3333 default: 3334 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && 3335 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) 3336 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3337 else if (tgt->logo_rcvd) 3338 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3339 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3340 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3341 else 3342 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3343 3344 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3345 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3346 rsp->status, rsp->error, status); 3347 break; 3348 }; 3349 3350 kref_put(&tgt->kref, ibmvfc_release_tgt); 3351 ibmvfc_free_event(evt); 3352 wake_up(&vhost->work_wait_q); 3353 } 3354 3355 /** 3356 * ibmvfc_tgt_send_prli - Send a process login 3357 * @tgt: ibmvfc target struct 3358 * 3359 **/ 3360 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3361 { 3362 struct ibmvfc_process_login *prli; 3363 struct ibmvfc_host *vhost = tgt->vhost; 3364 struct ibmvfc_event *evt; 3365 3366 if (vhost->discovery_threads >= disc_threads) 3367 return; 3368 3369 kref_get(&tgt->kref); 3370 evt = ibmvfc_get_event(vhost); 3371 vhost->discovery_threads++; 3372 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 3373 evt->tgt = tgt; 3374 prli = &evt->iu.prli; 3375 memset(prli, 0, sizeof(*prli)); 3376 prli->common.version = cpu_to_be32(1); 3377 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); 3378 prli->common.length = cpu_to_be16(sizeof(*prli)); 3379 prli->scsi_id = cpu_to_be64(tgt->scsi_id); 3380 3381 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 3382 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); 3383 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); 3384 3385 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3386 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3387 vhost->discovery_threads--; 3388 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3389 kref_put(&tgt->kref, ibmvfc_release_tgt); 3390 } else 3391 tgt_dbg(tgt, "Sent process login\n"); 3392 } 3393 3394 /** 3395 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 3396 * @evt: ibmvfc event struct 3397 * 3398 **/ 3399 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 3400 { 3401 struct ibmvfc_target *tgt = evt->tgt; 3402 struct ibmvfc_host *vhost = evt->vhost; 3403 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 3404 u32 status = be16_to_cpu(rsp->common.status); 3405 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3406 3407 vhost->discovery_threads--; 3408 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3409 switch (status) { 3410 case IBMVFC_MAD_SUCCESS: 3411 tgt_dbg(tgt, "Port Login succeeded\n"); 3412 if (tgt->ids.port_name && 3413 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 3414 vhost->reinit = 1; 3415 tgt_dbg(tgt, "Port re-init required\n"); 3416 break; 3417 } 3418 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3419 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3420 tgt->ids.port_id = tgt->scsi_id; 3421 memcpy(&tgt->service_parms, &rsp->service_parms, 3422 sizeof(tgt->service_parms)); 3423 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3424 sizeof(tgt->service_parms_change)); 3425 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3426 break; 3427 case IBMVFC_MAD_DRIVER_FAILED: 3428 break; 3429 case IBMVFC_MAD_CRQ_ERROR: 3430 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3431 break; 3432 case IBMVFC_MAD_FAILED: 3433 default: 3434 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3435 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3436 else 3437 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3438 3439 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3440 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), rsp->status, rsp->error, 3441 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), rsp->fc_type, 3442 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), rsp->fc_explain, status); 3443 break; 3444 }; 3445 3446 kref_put(&tgt->kref, ibmvfc_release_tgt); 3447 ibmvfc_free_event(evt); 3448 wake_up(&vhost->work_wait_q); 3449 } 3450 3451 /** 3452 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3453 * @tgt: ibmvfc target struct 3454 * 3455 **/ 3456 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3457 { 3458 struct ibmvfc_port_login *plogi; 3459 struct ibmvfc_host *vhost = tgt->vhost; 3460 struct ibmvfc_event *evt; 3461 3462 if (vhost->discovery_threads >= disc_threads) 3463 return; 3464 3465 kref_get(&tgt->kref); 3466 tgt->logo_rcvd = 0; 3467 evt = ibmvfc_get_event(vhost); 3468 vhost->discovery_threads++; 3469 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3470 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3471 evt->tgt = tgt; 3472 plogi = &evt->iu.plogi; 3473 memset(plogi, 0, sizeof(*plogi)); 3474 plogi->common.version = cpu_to_be32(1); 3475 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 3476 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 3477 plogi->scsi_id = cpu_to_be64(tgt->scsi_id); 3478 3479 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3480 vhost->discovery_threads--; 3481 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3482 kref_put(&tgt->kref, ibmvfc_release_tgt); 3483 } else 3484 tgt_dbg(tgt, "Sent port login\n"); 3485 } 3486 3487 /** 3488 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3489 * @evt: ibmvfc event struct 3490 * 3491 **/ 3492 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3493 { 3494 struct ibmvfc_target *tgt = evt->tgt; 3495 struct ibmvfc_host *vhost = evt->vhost; 3496 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3497 u32 status = be16_to_cpu(rsp->common.status); 3498 3499 vhost->discovery_threads--; 3500 ibmvfc_free_event(evt); 3501 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3502 3503 switch (status) { 3504 case IBMVFC_MAD_SUCCESS: 3505 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3506 break; 3507 case IBMVFC_MAD_DRIVER_FAILED: 3508 kref_put(&tgt->kref, ibmvfc_release_tgt); 3509 wake_up(&vhost->work_wait_q); 3510 return; 3511 case IBMVFC_MAD_FAILED: 3512 default: 3513 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3514 break; 3515 }; 3516 3517 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3518 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3519 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3520 tgt->scsi_id != tgt->new_scsi_id) 3521 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3522 kref_put(&tgt->kref, ibmvfc_release_tgt); 3523 wake_up(&vhost->work_wait_q); 3524 } 3525 3526 /** 3527 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3528 * @tgt: ibmvfc target struct 3529 * 3530 **/ 3531 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3532 { 3533 struct ibmvfc_implicit_logout *mad; 3534 struct ibmvfc_host *vhost = tgt->vhost; 3535 struct ibmvfc_event *evt; 3536 3537 if (vhost->discovery_threads >= disc_threads) 3538 return; 3539 3540 kref_get(&tgt->kref); 3541 evt = ibmvfc_get_event(vhost); 3542 vhost->discovery_threads++; 3543 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3544 evt->tgt = tgt; 3545 mad = &evt->iu.implicit_logout; 3546 memset(mad, 0, sizeof(*mad)); 3547 mad->common.version = cpu_to_be32(1); 3548 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); 3549 mad->common.length = cpu_to_be16(sizeof(*mad)); 3550 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); 3551 3552 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3553 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3554 vhost->discovery_threads--; 3555 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3556 kref_put(&tgt->kref, ibmvfc_release_tgt); 3557 } else 3558 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3559 } 3560 3561 /** 3562 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3563 * @mad: ibmvfc passthru mad struct 3564 * @tgt: ibmvfc target struct 3565 * 3566 * Returns: 3567 * 1 if PLOGI needed / 0 if PLOGI not needed 3568 **/ 3569 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3570 struct ibmvfc_target *tgt) 3571 { 3572 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3573 sizeof(tgt->ids.port_name))) 3574 return 1; 3575 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3576 sizeof(tgt->ids.node_name))) 3577 return 1; 3578 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) 3579 return 1; 3580 return 0; 3581 } 3582 3583 /** 3584 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3585 * @evt: ibmvfc event struct 3586 * 3587 **/ 3588 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3589 { 3590 struct ibmvfc_target *tgt = evt->tgt; 3591 struct ibmvfc_host *vhost = evt->vhost; 3592 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3593 u32 status = be16_to_cpu(mad->common.status); 3594 u8 fc_reason, fc_explain; 3595 3596 vhost->discovery_threads--; 3597 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3598 del_timer(&tgt->timer); 3599 3600 switch (status) { 3601 case IBMVFC_MAD_SUCCESS: 3602 tgt_dbg(tgt, "ADISC succeeded\n"); 3603 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3604 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3605 break; 3606 case IBMVFC_MAD_DRIVER_FAILED: 3607 break; 3608 case IBMVFC_MAD_FAILED: 3609 default: 3610 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3611 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; 3612 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; 3613 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3614 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), 3615 mad->iu.status, mad->iu.error, 3616 ibmvfc_get_fc_type(fc_reason), fc_reason, 3617 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3618 break; 3619 }; 3620 3621 kref_put(&tgt->kref, ibmvfc_release_tgt); 3622 ibmvfc_free_event(evt); 3623 wake_up(&vhost->work_wait_q); 3624 } 3625 3626 /** 3627 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3628 * @evt: ibmvfc event struct 3629 * 3630 **/ 3631 static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3632 { 3633 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3634 3635 memset(mad, 0, sizeof(*mad)); 3636 mad->common.version = cpu_to_be32(1); 3637 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 3638 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 3639 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3640 offsetof(struct ibmvfc_passthru_mad, iu)); 3641 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 3642 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3643 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3644 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3645 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3646 offsetof(struct ibmvfc_passthru_fc_iu, payload)); 3647 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3648 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3649 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3650 offsetof(struct ibmvfc_passthru_fc_iu, response)); 3651 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3652 } 3653 3654 /** 3655 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3656 * @evt: ibmvfc event struct 3657 * 3658 * Just cleanup this event struct. Everything else is handled by 3659 * the ADISC completion handler. If the ADISC never actually comes 3660 * back, we still have the timer running on the ADISC event struct 3661 * which will fire and cause the CRQ to get reset. 3662 * 3663 **/ 3664 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3665 { 3666 struct ibmvfc_host *vhost = evt->vhost; 3667 struct ibmvfc_target *tgt = evt->tgt; 3668 3669 tgt_dbg(tgt, "ADISC cancel complete\n"); 3670 vhost->abort_threads--; 3671 ibmvfc_free_event(evt); 3672 kref_put(&tgt->kref, ibmvfc_release_tgt); 3673 wake_up(&vhost->work_wait_q); 3674 } 3675 3676 /** 3677 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3678 * @tgt: ibmvfc target struct 3679 * 3680 * If an ADISC times out, send a cancel. If the cancel times 3681 * out, reset the CRQ. When the ADISC comes back as cancelled, 3682 * log back into the target. 3683 **/ 3684 static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) 3685 { 3686 struct ibmvfc_host *vhost = tgt->vhost; 3687 struct ibmvfc_event *evt; 3688 struct ibmvfc_tmf *tmf; 3689 unsigned long flags; 3690 int rc; 3691 3692 tgt_dbg(tgt, "ADISC timeout\n"); 3693 spin_lock_irqsave(vhost->host->host_lock, flags); 3694 if (vhost->abort_threads >= disc_threads || 3695 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3696 vhost->state != IBMVFC_INITIALIZING || 3697 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3698 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3699 return; 3700 } 3701 3702 vhost->abort_threads++; 3703 kref_get(&tgt->kref); 3704 evt = ibmvfc_get_event(vhost); 3705 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3706 3707 evt->tgt = tgt; 3708 tmf = &evt->iu.tmf; 3709 memset(tmf, 0, sizeof(*tmf)); 3710 tmf->common.version = cpu_to_be32(1); 3711 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 3712 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 3713 tmf->scsi_id = cpu_to_be64(tgt->scsi_id); 3714 tmf->cancel_key = cpu_to_be32(tgt->cancel_key); 3715 3716 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3717 3718 if (rc) { 3719 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3720 vhost->abort_threads--; 3721 kref_put(&tgt->kref, ibmvfc_release_tgt); 3722 __ibmvfc_reset_host(vhost); 3723 } else 3724 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3725 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3726 } 3727 3728 /** 3729 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3730 * @tgt: ibmvfc target struct 3731 * 3732 * When sending an ADISC we end up with two timers running. The 3733 * first timer is the timer in the ibmvfc target struct. If this 3734 * fires, we send a cancel to the target. The second timer is the 3735 * timer on the ibmvfc event for the ADISC, which is longer. If that 3736 * fires, it means the ADISC timed out and our attempt to cancel it 3737 * also failed, so we need to reset the CRQ. 3738 **/ 3739 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3740 { 3741 struct ibmvfc_passthru_mad *mad; 3742 struct ibmvfc_host *vhost = tgt->vhost; 3743 struct ibmvfc_event *evt; 3744 3745 if (vhost->discovery_threads >= disc_threads) 3746 return; 3747 3748 kref_get(&tgt->kref); 3749 evt = ibmvfc_get_event(vhost); 3750 vhost->discovery_threads++; 3751 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3752 evt->tgt = tgt; 3753 3754 ibmvfc_init_passthru(evt); 3755 mad = &evt->iu.passthru; 3756 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); 3757 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); 3758 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); 3759 3760 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); 3761 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3762 sizeof(vhost->login_buf->resp.port_name)); 3763 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3764 sizeof(vhost->login_buf->resp.node_name)); 3765 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); 3766 3767 if (timer_pending(&tgt->timer)) 3768 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3769 else { 3770 tgt->timer.data = (unsigned long) tgt; 3771 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3772 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; 3773 add_timer(&tgt->timer); 3774 } 3775 3776 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3777 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3778 vhost->discovery_threads--; 3779 del_timer(&tgt->timer); 3780 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3781 kref_put(&tgt->kref, ibmvfc_release_tgt); 3782 } else 3783 tgt_dbg(tgt, "Sent ADISC\n"); 3784 } 3785 3786 /** 3787 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3788 * @evt: ibmvfc event struct 3789 * 3790 **/ 3791 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3792 { 3793 struct ibmvfc_target *tgt = evt->tgt; 3794 struct ibmvfc_host *vhost = evt->vhost; 3795 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3796 u32 status = be16_to_cpu(rsp->common.status); 3797 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3798 3799 vhost->discovery_threads--; 3800 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3801 switch (status) { 3802 case IBMVFC_MAD_SUCCESS: 3803 tgt_dbg(tgt, "Query Target succeeded\n"); 3804 tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id); 3805 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) 3806 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3807 else 3808 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3809 break; 3810 case IBMVFC_MAD_DRIVER_FAILED: 3811 break; 3812 case IBMVFC_MAD_CRQ_ERROR: 3813 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3814 break; 3815 case IBMVFC_MAD_FAILED: 3816 default: 3817 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3818 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && 3819 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) 3820 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3821 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3822 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3823 else 3824 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3825 3826 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3827 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3828 rsp->status, rsp->error, ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), 3829 rsp->fc_type, ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), 3830 rsp->fc_explain, status); 3831 break; 3832 }; 3833 3834 kref_put(&tgt->kref, ibmvfc_release_tgt); 3835 ibmvfc_free_event(evt); 3836 wake_up(&vhost->work_wait_q); 3837 } 3838 3839 /** 3840 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3841 * @tgt: ibmvfc target struct 3842 * 3843 **/ 3844 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3845 { 3846 struct ibmvfc_query_tgt *query_tgt; 3847 struct ibmvfc_host *vhost = tgt->vhost; 3848 struct ibmvfc_event *evt; 3849 3850 if (vhost->discovery_threads >= disc_threads) 3851 return; 3852 3853 kref_get(&tgt->kref); 3854 evt = ibmvfc_get_event(vhost); 3855 vhost->discovery_threads++; 3856 evt->tgt = tgt; 3857 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3858 query_tgt = &evt->iu.query_tgt; 3859 memset(query_tgt, 0, sizeof(*query_tgt)); 3860 query_tgt->common.version = cpu_to_be32(1); 3861 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); 3862 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); 3863 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); 3864 3865 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3866 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3867 vhost->discovery_threads--; 3868 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3869 kref_put(&tgt->kref, ibmvfc_release_tgt); 3870 } else 3871 tgt_dbg(tgt, "Sent Query Target\n"); 3872 } 3873 3874 /** 3875 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3876 * @vhost: ibmvfc host struct 3877 * @scsi_id: SCSI ID to allocate target for 3878 * 3879 * Returns: 3880 * 0 on success / other on failure 3881 **/ 3882 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3883 { 3884 struct ibmvfc_target *tgt; 3885 unsigned long flags; 3886 3887 spin_lock_irqsave(vhost->host->host_lock, flags); 3888 list_for_each_entry(tgt, &vhost->targets, queue) { 3889 if (tgt->scsi_id == scsi_id) { 3890 if (tgt->need_login) 3891 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3892 goto unlock_out; 3893 } 3894 } 3895 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3896 3897 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3898 if (!tgt) { 3899 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", 3900 scsi_id); 3901 return -ENOMEM; 3902 } 3903 3904 memset(tgt, 0, sizeof(*tgt)); 3905 tgt->scsi_id = scsi_id; 3906 tgt->new_scsi_id = scsi_id; 3907 tgt->vhost = vhost; 3908 tgt->need_login = 1; 3909 tgt->cancel_key = vhost->task_set++; 3910 init_timer(&tgt->timer); 3911 kref_init(&tgt->kref); 3912 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3913 spin_lock_irqsave(vhost->host->host_lock, flags); 3914 list_add_tail(&tgt->queue, &vhost->targets); 3915 3916 unlock_out: 3917 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3918 return 0; 3919 } 3920 3921 /** 3922 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3923 * @vhost: ibmvfc host struct 3924 * 3925 * Returns: 3926 * 0 on success / other on failure 3927 **/ 3928 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3929 { 3930 int i, rc; 3931 3932 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3933 rc = ibmvfc_alloc_target(vhost, 3934 be32_to_cpu(vhost->disc_buf->scsi_id[i]) & 3935 IBMVFC_DISC_TGT_SCSI_ID_MASK); 3936 3937 return rc; 3938 } 3939 3940 /** 3941 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3942 * @evt: ibmvfc event struct 3943 * 3944 **/ 3945 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3946 { 3947 struct ibmvfc_host *vhost = evt->vhost; 3948 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3949 u32 mad_status = be16_to_cpu(rsp->common.status); 3950 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3951 3952 switch (mad_status) { 3953 case IBMVFC_MAD_SUCCESS: 3954 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3955 vhost->num_targets = be32_to_cpu(rsp->num_written); 3956 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3957 break; 3958 case IBMVFC_MAD_FAILED: 3959 level += ibmvfc_retry_host_init(vhost); 3960 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 3961 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3962 rsp->status, rsp->error); 3963 break; 3964 case IBMVFC_MAD_DRIVER_FAILED: 3965 break; 3966 default: 3967 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3968 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3969 break; 3970 } 3971 3972 ibmvfc_free_event(evt); 3973 wake_up(&vhost->work_wait_q); 3974 } 3975 3976 /** 3977 * ibmvfc_discover_targets - Send Discover Targets MAD 3978 * @vhost: ibmvfc host struct 3979 * 3980 **/ 3981 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3982 { 3983 struct ibmvfc_discover_targets *mad; 3984 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3985 3986 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3987 mad = &evt->iu.discover_targets; 3988 memset(mad, 0, sizeof(*mad)); 3989 mad->common.version = cpu_to_be32(1); 3990 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); 3991 mad->common.length = cpu_to_be16(sizeof(*mad)); 3992 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz); 3993 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma); 3994 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz); 3995 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3996 3997 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3998 ibmvfc_dbg(vhost, "Sent discover targets\n"); 3999 else 4000 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4001 } 4002 4003 /** 4004 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 4005 * @evt: ibmvfc event struct 4006 * 4007 **/ 4008 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 4009 { 4010 struct ibmvfc_host *vhost = evt->vhost; 4011 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); 4012 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 4013 unsigned int npiv_max_sectors; 4014 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4015 4016 switch (mad_status) { 4017 case IBMVFC_MAD_SUCCESS: 4018 ibmvfc_free_event(evt); 4019 break; 4020 case IBMVFC_MAD_FAILED: 4021 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4022 level += ibmvfc_retry_host_init(vhost); 4023 else 4024 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4025 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 4026 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4027 rsp->status, rsp->error); 4028 ibmvfc_free_event(evt); 4029 return; 4030 case IBMVFC_MAD_CRQ_ERROR: 4031 ibmvfc_retry_host_init(vhost); 4032 case IBMVFC_MAD_DRIVER_FAILED: 4033 ibmvfc_free_event(evt); 4034 return; 4035 default: 4036 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 4037 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4038 ibmvfc_free_event(evt); 4039 return; 4040 } 4041 4042 vhost->client_migrated = 0; 4043 4044 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { 4045 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 4046 rsp->flags); 4047 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4048 wake_up(&vhost->work_wait_q); 4049 return; 4050 } 4051 4052 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { 4053 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 4054 rsp->max_cmds); 4055 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4056 wake_up(&vhost->work_wait_q); 4057 return; 4058 } 4059 4060 vhost->logged_in = 1; 4061 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); 4062 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 4063 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 4064 rsp->drc_name, npiv_max_sectors); 4065 4066 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); 4067 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); 4068 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); 4069 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); 4070 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 4071 fc_host_supported_classes(vhost->host) = 0; 4072 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) 4073 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 4074 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) 4075 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 4076 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) 4077 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 4078 fc_host_maxframe_size(vhost->host) = 4079 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; 4080 4081 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; 4082 vhost->host->max_sectors = npiv_max_sectors; 4083 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4084 wake_up(&vhost->work_wait_q); 4085 } 4086 4087 /** 4088 * ibmvfc_npiv_login - Sends NPIV login 4089 * @vhost: ibmvfc host struct 4090 * 4091 **/ 4092 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 4093 { 4094 struct ibmvfc_npiv_login_mad *mad; 4095 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4096 4097 ibmvfc_gather_partition_info(vhost); 4098 ibmvfc_set_login_info(vhost); 4099 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 4100 4101 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 4102 mad = &evt->iu.npiv_login; 4103 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 4104 mad->common.version = cpu_to_be32(1); 4105 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); 4106 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); 4107 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); 4108 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); 4109 4110 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4111 4112 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4113 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 4114 else 4115 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4116 }; 4117 4118 /** 4119 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 4120 * @vhost: ibmvfc host struct 4121 * 4122 **/ 4123 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 4124 { 4125 struct ibmvfc_host *vhost = evt->vhost; 4126 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); 4127 4128 ibmvfc_free_event(evt); 4129 4130 switch (mad_status) { 4131 case IBMVFC_MAD_SUCCESS: 4132 if (list_empty(&vhost->sent) && 4133 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 4134 ibmvfc_init_host(vhost); 4135 return; 4136 } 4137 break; 4138 case IBMVFC_MAD_FAILED: 4139 case IBMVFC_MAD_NOT_SUPPORTED: 4140 case IBMVFC_MAD_CRQ_ERROR: 4141 case IBMVFC_MAD_DRIVER_FAILED: 4142 default: 4143 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 4144 break; 4145 } 4146 4147 ibmvfc_hard_reset_host(vhost); 4148 } 4149 4150 /** 4151 * ibmvfc_npiv_logout - Issue an NPIV Logout 4152 * @vhost: ibmvfc host struct 4153 * 4154 **/ 4155 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 4156 { 4157 struct ibmvfc_npiv_logout_mad *mad; 4158 struct ibmvfc_event *evt; 4159 4160 evt = ibmvfc_get_event(vhost); 4161 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 4162 4163 mad = &evt->iu.npiv_logout; 4164 memset(mad, 0, sizeof(*mad)); 4165 mad->common.version = cpu_to_be32(1); 4166 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); 4167 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); 4168 4169 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 4170 4171 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4172 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 4173 else 4174 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4175 } 4176 4177 /** 4178 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 4179 * @vhost: ibmvfc host struct 4180 * 4181 * Returns: 4182 * 1 if work to do / 0 if not 4183 **/ 4184 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 4185 { 4186 struct ibmvfc_target *tgt; 4187 4188 list_for_each_entry(tgt, &vhost->targets, queue) { 4189 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 4190 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4191 return 1; 4192 } 4193 4194 return 0; 4195 } 4196 4197 /** 4198 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 4199 * @vhost: ibmvfc host struct 4200 * 4201 * Returns: 4202 * 1 if work to do / 0 if not 4203 **/ 4204 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4205 { 4206 struct ibmvfc_target *tgt; 4207 4208 if (kthread_should_stop()) 4209 return 1; 4210 switch (vhost->action) { 4211 case IBMVFC_HOST_ACTION_NONE: 4212 case IBMVFC_HOST_ACTION_INIT_WAIT: 4213 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4214 return 0; 4215 case IBMVFC_HOST_ACTION_TGT_INIT: 4216 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4217 if (vhost->discovery_threads == disc_threads) 4218 return 0; 4219 list_for_each_entry(tgt, &vhost->targets, queue) 4220 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 4221 return 1; 4222 list_for_each_entry(tgt, &vhost->targets, queue) 4223 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4224 return 0; 4225 return 1; 4226 case IBMVFC_HOST_ACTION_LOGO: 4227 case IBMVFC_HOST_ACTION_INIT: 4228 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4229 case IBMVFC_HOST_ACTION_TGT_DEL: 4230 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4231 case IBMVFC_HOST_ACTION_QUERY: 4232 case IBMVFC_HOST_ACTION_RESET: 4233 case IBMVFC_HOST_ACTION_REENABLE: 4234 default: 4235 break; 4236 }; 4237 4238 return 1; 4239 } 4240 4241 /** 4242 * ibmvfc_work_to_do - Is there task level work to do? 4243 * @vhost: ibmvfc host struct 4244 * 4245 * Returns: 4246 * 1 if work to do / 0 if not 4247 **/ 4248 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4249 { 4250 unsigned long flags; 4251 int rc; 4252 4253 spin_lock_irqsave(vhost->host->host_lock, flags); 4254 rc = __ibmvfc_work_to_do(vhost); 4255 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4256 return rc; 4257 } 4258 4259 /** 4260 * ibmvfc_log_ae - Log async events if necessary 4261 * @vhost: ibmvfc host struct 4262 * @events: events to log 4263 * 4264 **/ 4265 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 4266 { 4267 if (events & IBMVFC_AE_RSCN) 4268 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 4269 if ((events & IBMVFC_AE_LINKDOWN) && 4270 vhost->state >= IBMVFC_HALTED) 4271 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 4272 if ((events & IBMVFC_AE_LINKUP) && 4273 vhost->state == IBMVFC_INITIALIZING) 4274 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 4275 } 4276 4277 /** 4278 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 4279 * @tgt: ibmvfc target struct 4280 * 4281 **/ 4282 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 4283 { 4284 struct ibmvfc_host *vhost = tgt->vhost; 4285 struct fc_rport *rport; 4286 unsigned long flags; 4287 4288 tgt_dbg(tgt, "Adding rport\n"); 4289 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 4290 spin_lock_irqsave(vhost->host->host_lock, flags); 4291 4292 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4293 tgt_dbg(tgt, "Deleting rport\n"); 4294 list_del(&tgt->queue); 4295 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4296 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4297 fc_remote_port_delete(rport); 4298 del_timer_sync(&tgt->timer); 4299 kref_put(&tgt->kref, ibmvfc_release_tgt); 4300 return; 4301 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 4302 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4303 return; 4304 } 4305 4306 if (rport) { 4307 tgt_dbg(tgt, "rport add succeeded\n"); 4308 tgt->rport = rport; 4309 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; 4310 rport->supported_classes = 0; 4311 tgt->target_id = rport->scsi_target_id; 4312 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) 4313 rport->supported_classes |= FC_COS_CLASS1; 4314 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) 4315 rport->supported_classes |= FC_COS_CLASS2; 4316 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) 4317 rport->supported_classes |= FC_COS_CLASS3; 4318 if (rport->rqst_q) 4319 blk_queue_max_segments(rport->rqst_q, 1); 4320 } else 4321 tgt_dbg(tgt, "rport add failed\n"); 4322 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4323 } 4324 4325 /** 4326 * ibmvfc_do_work - Do task level work 4327 * @vhost: ibmvfc host struct 4328 * 4329 **/ 4330 static void ibmvfc_do_work(struct ibmvfc_host *vhost) 4331 { 4332 struct ibmvfc_target *tgt; 4333 unsigned long flags; 4334 struct fc_rport *rport; 4335 int rc; 4336 4337 ibmvfc_log_ae(vhost, vhost->events_to_log); 4338 spin_lock_irqsave(vhost->host->host_lock, flags); 4339 vhost->events_to_log = 0; 4340 switch (vhost->action) { 4341 case IBMVFC_HOST_ACTION_NONE: 4342 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4343 case IBMVFC_HOST_ACTION_INIT_WAIT: 4344 break; 4345 case IBMVFC_HOST_ACTION_RESET: 4346 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4347 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4348 rc = ibmvfc_reset_crq(vhost); 4349 spin_lock_irqsave(vhost->host->host_lock, flags); 4350 if (rc == H_CLOSED) 4351 vio_enable_interrupts(to_vio_dev(vhost->dev)); 4352 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 4353 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 4354 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4355 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 4356 } 4357 break; 4358 case IBMVFC_HOST_ACTION_REENABLE: 4359 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4360 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4361 rc = ibmvfc_reenable_crq_queue(vhost); 4362 spin_lock_irqsave(vhost->host->host_lock, flags); 4363 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 4364 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4365 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 4366 } 4367 break; 4368 case IBMVFC_HOST_ACTION_LOGO: 4369 vhost->job_step(vhost); 4370 break; 4371 case IBMVFC_HOST_ACTION_INIT: 4372 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 4373 if (vhost->delay_init) { 4374 vhost->delay_init = 0; 4375 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4376 ssleep(15); 4377 return; 4378 } else 4379 vhost->job_step(vhost); 4380 break; 4381 case IBMVFC_HOST_ACTION_QUERY: 4382 list_for_each_entry(tgt, &vhost->targets, queue) 4383 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 4384 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 4385 break; 4386 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4387 list_for_each_entry(tgt, &vhost->targets, queue) { 4388 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4389 tgt->job_step(tgt); 4390 break; 4391 } 4392 } 4393 4394 if (!ibmvfc_dev_init_to_do(vhost)) 4395 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 4396 break; 4397 case IBMVFC_HOST_ACTION_TGT_DEL: 4398 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4399 list_for_each_entry(tgt, &vhost->targets, queue) { 4400 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4401 tgt_dbg(tgt, "Deleting rport\n"); 4402 rport = tgt->rport; 4403 tgt->rport = NULL; 4404 list_del(&tgt->queue); 4405 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4406 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4407 if (rport) 4408 fc_remote_port_delete(rport); 4409 del_timer_sync(&tgt->timer); 4410 kref_put(&tgt->kref, ibmvfc_release_tgt); 4411 return; 4412 } 4413 } 4414 4415 if (vhost->state == IBMVFC_INITIALIZING) { 4416 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 4417 if (vhost->reinit) { 4418 vhost->reinit = 0; 4419 scsi_block_requests(vhost->host); 4420 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4421 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4422 } else { 4423 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 4424 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4425 wake_up(&vhost->init_wait_q); 4426 schedule_work(&vhost->rport_add_work_q); 4427 vhost->init_retries = 0; 4428 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4429 scsi_unblock_requests(vhost->host); 4430 } 4431 4432 return; 4433 } else { 4434 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 4435 vhost->job_step = ibmvfc_discover_targets; 4436 } 4437 } else { 4438 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4439 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4440 scsi_unblock_requests(vhost->host); 4441 wake_up(&vhost->init_wait_q); 4442 return; 4443 } 4444 break; 4445 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4446 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4447 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4448 ibmvfc_alloc_targets(vhost); 4449 spin_lock_irqsave(vhost->host->host_lock, flags); 4450 break; 4451 case IBMVFC_HOST_ACTION_TGT_INIT: 4452 list_for_each_entry(tgt, &vhost->targets, queue) { 4453 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4454 tgt->job_step(tgt); 4455 break; 4456 } 4457 } 4458 4459 if (!ibmvfc_dev_init_to_do(vhost)) 4460 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4461 break; 4462 default: 4463 break; 4464 }; 4465 4466 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4467 } 4468 4469 /** 4470 * ibmvfc_work - Do task level work 4471 * @data: ibmvfc host struct 4472 * 4473 * Returns: 4474 * zero 4475 **/ 4476 static int ibmvfc_work(void *data) 4477 { 4478 struct ibmvfc_host *vhost = data; 4479 int rc; 4480 4481 set_user_nice(current, MIN_NICE); 4482 4483 while (1) { 4484 rc = wait_event_interruptible(vhost->work_wait_q, 4485 ibmvfc_work_to_do(vhost)); 4486 4487 BUG_ON(rc); 4488 4489 if (kthread_should_stop()) 4490 break; 4491 4492 ibmvfc_do_work(vhost); 4493 } 4494 4495 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4496 return 0; 4497 } 4498 4499 /** 4500 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4501 * @vhost: ibmvfc host struct 4502 * 4503 * Allocates a page for messages, maps it for dma, and registers 4504 * the crq with the hypervisor. 4505 * 4506 * Return value: 4507 * zero on success / other on failure 4508 **/ 4509 static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4510 { 4511 int rc, retrc = -ENOMEM; 4512 struct device *dev = vhost->dev; 4513 struct vio_dev *vdev = to_vio_dev(dev); 4514 struct ibmvfc_crq_queue *crq = &vhost->crq; 4515 4516 ENTER; 4517 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4518 4519 if (!crq->msgs) 4520 return -ENOMEM; 4521 4522 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4523 crq->msg_token = dma_map_single(dev, crq->msgs, 4524 PAGE_SIZE, DMA_BIDIRECTIONAL); 4525 4526 if (dma_mapping_error(dev, crq->msg_token)) 4527 goto map_failed; 4528 4529 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4530 crq->msg_token, PAGE_SIZE); 4531 4532 if (rc == H_RESOURCE) 4533 /* maybe kexecing and resource is busy. try a reset */ 4534 retrc = rc = ibmvfc_reset_crq(vhost); 4535 4536 if (rc == H_CLOSED) 4537 dev_warn(dev, "Partner adapter not ready\n"); 4538 else if (rc) { 4539 dev_warn(dev, "Error %d opening adapter\n", rc); 4540 goto reg_crq_failed; 4541 } 4542 4543 retrc = 0; 4544 4545 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4546 4547 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4548 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4549 goto req_irq_failed; 4550 } 4551 4552 if ((rc = vio_enable_interrupts(vdev))) { 4553 dev_err(dev, "Error %d enabling interrupts\n", rc); 4554 goto req_irq_failed; 4555 } 4556 4557 crq->cur = 0; 4558 LEAVE; 4559 return retrc; 4560 4561 req_irq_failed: 4562 tasklet_kill(&vhost->tasklet); 4563 do { 4564 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4565 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4566 reg_crq_failed: 4567 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4568 map_failed: 4569 free_page((unsigned long)crq->msgs); 4570 return retrc; 4571 } 4572 4573 /** 4574 * ibmvfc_free_mem - Free memory for vhost 4575 * @vhost: ibmvfc host struct 4576 * 4577 * Return value: 4578 * none 4579 **/ 4580 static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4581 { 4582 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4583 4584 ENTER; 4585 mempool_destroy(vhost->tgt_pool); 4586 kfree(vhost->trace); 4587 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4588 vhost->disc_buf_dma); 4589 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4590 vhost->login_buf, vhost->login_buf_dma); 4591 dma_pool_destroy(vhost->sg_pool); 4592 dma_unmap_single(vhost->dev, async_q->msg_token, 4593 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4594 free_page((unsigned long)async_q->msgs); 4595 LEAVE; 4596 } 4597 4598 /** 4599 * ibmvfc_alloc_mem - Allocate memory for vhost 4600 * @vhost: ibmvfc host struct 4601 * 4602 * Return value: 4603 * 0 on success / non-zero on failure 4604 **/ 4605 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4606 { 4607 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4608 struct device *dev = vhost->dev; 4609 4610 ENTER; 4611 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4612 if (!async_q->msgs) { 4613 dev_err(dev, "Couldn't allocate async queue.\n"); 4614 goto nomem; 4615 } 4616 4617 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4618 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4619 async_q->size * sizeof(*async_q->msgs), 4620 DMA_BIDIRECTIONAL); 4621 4622 if (dma_mapping_error(dev, async_q->msg_token)) { 4623 dev_err(dev, "Failed to map async queue\n"); 4624 goto free_async_crq; 4625 } 4626 4627 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4628 SG_ALL * sizeof(struct srp_direct_buf), 4629 sizeof(struct srp_direct_buf), 0); 4630 4631 if (!vhost->sg_pool) { 4632 dev_err(dev, "Failed to allocate sg pool\n"); 4633 goto unmap_async_crq; 4634 } 4635 4636 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4637 &vhost->login_buf_dma, GFP_KERNEL); 4638 4639 if (!vhost->login_buf) { 4640 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4641 goto free_sg_pool; 4642 } 4643 4644 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4645 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4646 &vhost->disc_buf_dma, GFP_KERNEL); 4647 4648 if (!vhost->disc_buf) { 4649 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4650 goto free_login_buffer; 4651 } 4652 4653 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4654 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4655 4656 if (!vhost->trace) 4657 goto free_disc_buffer; 4658 4659 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4660 sizeof(struct ibmvfc_target)); 4661 4662 if (!vhost->tgt_pool) { 4663 dev_err(dev, "Couldn't allocate target memory pool\n"); 4664 goto free_trace; 4665 } 4666 4667 LEAVE; 4668 return 0; 4669 4670 free_trace: 4671 kfree(vhost->trace); 4672 free_disc_buffer: 4673 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4674 vhost->disc_buf_dma); 4675 free_login_buffer: 4676 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4677 vhost->login_buf, vhost->login_buf_dma); 4678 free_sg_pool: 4679 dma_pool_destroy(vhost->sg_pool); 4680 unmap_async_crq: 4681 dma_unmap_single(dev, async_q->msg_token, 4682 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4683 free_async_crq: 4684 free_page((unsigned long)async_q->msgs); 4685 nomem: 4686 LEAVE; 4687 return -ENOMEM; 4688 } 4689 4690 /** 4691 * ibmvfc_rport_add_thread - Worker thread for rport adds 4692 * @work: work struct 4693 * 4694 **/ 4695 static void ibmvfc_rport_add_thread(struct work_struct *work) 4696 { 4697 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4698 rport_add_work_q); 4699 struct ibmvfc_target *tgt; 4700 struct fc_rport *rport; 4701 unsigned long flags; 4702 int did_work; 4703 4704 ENTER; 4705 spin_lock_irqsave(vhost->host->host_lock, flags); 4706 do { 4707 did_work = 0; 4708 if (vhost->state != IBMVFC_ACTIVE) 4709 break; 4710 4711 list_for_each_entry(tgt, &vhost->targets, queue) { 4712 if (tgt->add_rport) { 4713 did_work = 1; 4714 tgt->add_rport = 0; 4715 kref_get(&tgt->kref); 4716 rport = tgt->rport; 4717 if (!rport) { 4718 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4719 ibmvfc_tgt_add_rport(tgt); 4720 } else if (get_device(&rport->dev)) { 4721 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4722 tgt_dbg(tgt, "Setting rport roles\n"); 4723 fc_remote_port_rolechg(rport, tgt->ids.roles); 4724 put_device(&rport->dev); 4725 } 4726 4727 kref_put(&tgt->kref, ibmvfc_release_tgt); 4728 spin_lock_irqsave(vhost->host->host_lock, flags); 4729 break; 4730 } 4731 } 4732 } while(did_work); 4733 4734 if (vhost->state == IBMVFC_ACTIVE) 4735 vhost->scan_complete = 1; 4736 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4737 LEAVE; 4738 } 4739 4740 /** 4741 * ibmvfc_probe - Adapter hot plug add entry point 4742 * @vdev: vio device struct 4743 * @id: vio device id struct 4744 * 4745 * Return value: 4746 * 0 on success / non-zero on failure 4747 **/ 4748 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4749 { 4750 struct ibmvfc_host *vhost; 4751 struct Scsi_Host *shost; 4752 struct device *dev = &vdev->dev; 4753 int rc = -ENOMEM; 4754 4755 ENTER; 4756 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4757 if (!shost) { 4758 dev_err(dev, "Couldn't allocate host data\n"); 4759 goto out; 4760 } 4761 4762 shost->transportt = ibmvfc_transport_template; 4763 shost->can_queue = max_requests; 4764 shost->max_lun = max_lun; 4765 shost->max_id = max_targets; 4766 shost->max_sectors = IBMVFC_MAX_SECTORS; 4767 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4768 shost->unique_id = shost->host_no; 4769 4770 vhost = shost_priv(shost); 4771 INIT_LIST_HEAD(&vhost->sent); 4772 INIT_LIST_HEAD(&vhost->free); 4773 INIT_LIST_HEAD(&vhost->targets); 4774 sprintf(vhost->name, IBMVFC_NAME); 4775 vhost->host = shost; 4776 vhost->dev = dev; 4777 vhost->partition_number = -1; 4778 vhost->log_level = log_level; 4779 vhost->task_set = 1; 4780 strcpy(vhost->partition_name, "UNKNOWN"); 4781 init_waitqueue_head(&vhost->work_wait_q); 4782 init_waitqueue_head(&vhost->init_wait_q); 4783 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4784 mutex_init(&vhost->passthru_mutex); 4785 4786 if ((rc = ibmvfc_alloc_mem(vhost))) 4787 goto free_scsi_host; 4788 4789 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4790 shost->host_no); 4791 4792 if (IS_ERR(vhost->work_thread)) { 4793 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4794 PTR_ERR(vhost->work_thread)); 4795 goto free_host_mem; 4796 } 4797 4798 if ((rc = ibmvfc_init_crq(vhost))) { 4799 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4800 goto kill_kthread; 4801 } 4802 4803 if ((rc = ibmvfc_init_event_pool(vhost))) { 4804 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4805 goto release_crq; 4806 } 4807 4808 if ((rc = scsi_add_host(shost, dev))) 4809 goto release_event_pool; 4810 4811 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 4812 4813 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4814 &ibmvfc_trace_attr))) { 4815 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4816 goto remove_shost; 4817 } 4818 4819 if (shost_to_fc_host(shost)->rqst_q) 4820 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 4821 dev_set_drvdata(dev, vhost); 4822 spin_lock(&ibmvfc_driver_lock); 4823 list_add_tail(&vhost->queue, &ibmvfc_head); 4824 spin_unlock(&ibmvfc_driver_lock); 4825 4826 ibmvfc_send_crq_init(vhost); 4827 scsi_scan_host(shost); 4828 return 0; 4829 4830 remove_shost: 4831 scsi_remove_host(shost); 4832 release_event_pool: 4833 ibmvfc_free_event_pool(vhost); 4834 release_crq: 4835 ibmvfc_release_crq_queue(vhost); 4836 kill_kthread: 4837 kthread_stop(vhost->work_thread); 4838 free_host_mem: 4839 ibmvfc_free_mem(vhost); 4840 free_scsi_host: 4841 scsi_host_put(shost); 4842 out: 4843 LEAVE; 4844 return rc; 4845 } 4846 4847 /** 4848 * ibmvfc_remove - Adapter hot plug remove entry point 4849 * @vdev: vio device struct 4850 * 4851 * Return value: 4852 * 0 4853 **/ 4854 static int ibmvfc_remove(struct vio_dev *vdev) 4855 { 4856 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4857 unsigned long flags; 4858 4859 ENTER; 4860 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4861 4862 spin_lock_irqsave(vhost->host->host_lock, flags); 4863 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4864 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4865 4866 ibmvfc_wait_while_resetting(vhost); 4867 ibmvfc_release_crq_queue(vhost); 4868 kthread_stop(vhost->work_thread); 4869 fc_remove_host(vhost->host); 4870 scsi_remove_host(vhost->host); 4871 4872 spin_lock_irqsave(vhost->host->host_lock, flags); 4873 ibmvfc_purge_requests(vhost, DID_ERROR); 4874 ibmvfc_free_event_pool(vhost); 4875 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4876 4877 ibmvfc_free_mem(vhost); 4878 spin_lock(&ibmvfc_driver_lock); 4879 list_del(&vhost->queue); 4880 spin_unlock(&ibmvfc_driver_lock); 4881 scsi_host_put(vhost->host); 4882 LEAVE; 4883 return 0; 4884 } 4885 4886 /** 4887 * ibmvfc_resume - Resume from suspend 4888 * @dev: device struct 4889 * 4890 * We may have lost an interrupt across suspend/resume, so kick the 4891 * interrupt handler 4892 * 4893 */ 4894 static int ibmvfc_resume(struct device *dev) 4895 { 4896 unsigned long flags; 4897 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 4898 struct vio_dev *vdev = to_vio_dev(dev); 4899 4900 spin_lock_irqsave(vhost->host->host_lock, flags); 4901 vio_disable_interrupts(vdev); 4902 tasklet_schedule(&vhost->tasklet); 4903 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4904 return 0; 4905 } 4906 4907 /** 4908 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4909 * @vdev: vio device struct 4910 * 4911 * Return value: 4912 * Number of bytes the driver will need to DMA map at the same time in 4913 * order to perform well. 4914 */ 4915 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4916 { 4917 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4918 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4919 } 4920 4921 static struct vio_device_id ibmvfc_device_table[] = { 4922 {"fcp", "IBM,vfc-client"}, 4923 { "", "" } 4924 }; 4925 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4926 4927 static struct dev_pm_ops ibmvfc_pm_ops = { 4928 .resume = ibmvfc_resume 4929 }; 4930 4931 static struct vio_driver ibmvfc_driver = { 4932 .id_table = ibmvfc_device_table, 4933 .probe = ibmvfc_probe, 4934 .remove = ibmvfc_remove, 4935 .get_desired_dma = ibmvfc_get_desired_dma, 4936 .name = IBMVFC_NAME, 4937 .pm = &ibmvfc_pm_ops, 4938 }; 4939 4940 static struct fc_function_template ibmvfc_transport_functions = { 4941 .show_host_fabric_name = 1, 4942 .show_host_node_name = 1, 4943 .show_host_port_name = 1, 4944 .show_host_supported_classes = 1, 4945 .show_host_port_type = 1, 4946 .show_host_port_id = 1, 4947 .show_host_maxframe_size = 1, 4948 4949 .get_host_port_state = ibmvfc_get_host_port_state, 4950 .show_host_port_state = 1, 4951 4952 .get_host_speed = ibmvfc_get_host_speed, 4953 .show_host_speed = 1, 4954 4955 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4956 .terminate_rport_io = ibmvfc_terminate_rport_io, 4957 4958 .show_rport_maxframe_size = 1, 4959 .show_rport_supported_classes = 1, 4960 4961 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4962 .show_rport_dev_loss_tmo = 1, 4963 4964 .get_starget_node_name = ibmvfc_get_starget_node_name, 4965 .show_starget_node_name = 1, 4966 4967 .get_starget_port_name = ibmvfc_get_starget_port_name, 4968 .show_starget_port_name = 1, 4969 4970 .get_starget_port_id = ibmvfc_get_starget_port_id, 4971 .show_starget_port_id = 1, 4972 4973 .bsg_request = ibmvfc_bsg_request, 4974 .bsg_timeout = ibmvfc_bsg_timeout, 4975 }; 4976 4977 /** 4978 * ibmvfc_module_init - Initialize the ibmvfc module 4979 * 4980 * Return value: 4981 * 0 on success / other on failure 4982 **/ 4983 static int __init ibmvfc_module_init(void) 4984 { 4985 int rc; 4986 4987 if (!firmware_has_feature(FW_FEATURE_VIO)) 4988 return -ENODEV; 4989 4990 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4991 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4992 4993 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4994 if (!ibmvfc_transport_template) 4995 return -ENOMEM; 4996 4997 rc = vio_register_driver(&ibmvfc_driver); 4998 if (rc) 4999 fc_release_transport(ibmvfc_transport_template); 5000 return rc; 5001 } 5002 5003 /** 5004 * ibmvfc_module_exit - Teardown the ibmvfc module 5005 * 5006 * Return value: 5007 * nothing 5008 **/ 5009 static void __exit ibmvfc_module_exit(void) 5010 { 5011 vio_unregister_driver(&ibmvfc_driver); 5012 fc_release_transport(ibmvfc_transport_template); 5013 } 5014 5015 module_init(ibmvfc_module_init); 5016 module_exit(ibmvfc_module_exit); 5017