1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 4 * 5 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 6 * 7 * Copyright (C) IBM Corporation, 2008 8 */ 9 10 #include <linux/module.h> 11 #include <linux/moduleparam.h> 12 #include <linux/dma-mapping.h> 13 #include <linux/dmapool.h> 14 #include <linux/delay.h> 15 #include <linux/interrupt.h> 16 #include <linux/kthread.h> 17 #include <linux/slab.h> 18 #include <linux/of.h> 19 #include <linux/pm.h> 20 #include <linux/stringify.h> 21 #include <linux/bsg-lib.h> 22 #include <asm/firmware.h> 23 #include <asm/irq.h> 24 #include <asm/vio.h> 25 #include <scsi/scsi.h> 26 #include <scsi/scsi_cmnd.h> 27 #include <scsi/scsi_host.h> 28 #include <scsi/scsi_device.h> 29 #include <scsi/scsi_tcq.h> 30 #include <scsi/scsi_transport_fc.h> 31 #include <scsi/scsi_bsg_fc.h> 32 #include "ibmvfc.h" 33 34 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 35 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 36 static u64 max_lun = IBMVFC_MAX_LUN; 37 static unsigned int max_targets = IBMVFC_MAX_TARGETS; 38 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 39 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 40 static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 41 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 42 static unsigned int cls3_error = IBMVFC_CLS3_ERROR; 43 static LIST_HEAD(ibmvfc_head); 44 static DEFINE_SPINLOCK(ibmvfc_driver_lock); 45 static struct scsi_transport_template *ibmvfc_transport_template; 46 47 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 48 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 49 MODULE_LICENSE("GPL"); 50 MODULE_VERSION(IBMVFC_DRIVER_VERSION); 51 52 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 53 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 54 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 55 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 56 MODULE_PARM_DESC(default_timeout, 57 "Default timeout in seconds for initialization and EH commands. " 58 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 59 module_param_named(max_requests, max_requests, uint, S_IRUGO); 60 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 61 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 62 module_param_named(max_lun, max_lun, ullong, S_IRUGO); 63 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 64 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 65 module_param_named(max_targets, max_targets, uint, S_IRUGO); 66 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 67 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 68 module_param_named(disc_threads, disc_threads, uint, S_IRUGO); 69 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 70 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 71 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 72 MODULE_PARM_DESC(debug, "Enable driver debug information. " 73 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 74 module_param_named(log_level, log_level, uint, 0); 75 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 76 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 77 module_param_named(cls3_error, cls3_error, uint, 0); 78 MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. " 79 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]"); 80 81 static const struct { 82 u16 status; 83 u16 error; 84 u8 result; 85 u8 retry; 86 int log; 87 char *name; 88 } cmd_status [] = { 89 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 90 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 91 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 92 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 93 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 94 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 95 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 96 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 97 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 98 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 99 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 100 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 101 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 102 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 103 104 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 105 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 106 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 107 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 108 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 109 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 110 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 111 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 112 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 113 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 114 115 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 116 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 117 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 118 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 119 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 120 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 121 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 122 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 123 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 124 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 125 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 126 127 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 128 { IBMVFC_FC_SCSI_ERROR, IBMVFC_COMMAND_FAILED, DID_ERROR, 0, 1, "PRLI to device failed." }, 129 }; 130 131 static void ibmvfc_npiv_login(struct ibmvfc_host *); 132 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 133 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 134 static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 135 static void ibmvfc_npiv_logout(struct ibmvfc_host *); 136 137 static const char *unknown_error = "unknown error"; 138 139 #ifdef CONFIG_SCSI_IBMVFC_TRACE 140 /** 141 * ibmvfc_trc_start - Log a start trace entry 142 * @evt: ibmvfc event struct 143 * 144 **/ 145 static void ibmvfc_trc_start(struct ibmvfc_event *evt) 146 { 147 struct ibmvfc_host *vhost = evt->vhost; 148 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 149 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 150 struct ibmvfc_trace_entry *entry; 151 152 entry = &vhost->trace[vhost->trace_index++]; 153 entry->evt = evt; 154 entry->time = jiffies; 155 entry->fmt = evt->crq.format; 156 entry->type = IBMVFC_TRC_START; 157 158 switch (entry->fmt) { 159 case IBMVFC_CMD_FORMAT: 160 entry->op_code = vfc_cmd->iu.cdb[0]; 161 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 162 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 163 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 164 entry->u.start.xfer_len = be32_to_cpu(vfc_cmd->iu.xfer_len); 165 break; 166 case IBMVFC_MAD_FORMAT: 167 entry->op_code = be32_to_cpu(mad->opcode); 168 break; 169 default: 170 break; 171 } 172 } 173 174 /** 175 * ibmvfc_trc_end - Log an end trace entry 176 * @evt: ibmvfc event struct 177 * 178 **/ 179 static void ibmvfc_trc_end(struct ibmvfc_event *evt) 180 { 181 struct ibmvfc_host *vhost = evt->vhost; 182 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 183 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 184 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; 185 186 entry->evt = evt; 187 entry->time = jiffies; 188 entry->fmt = evt->crq.format; 189 entry->type = IBMVFC_TRC_END; 190 191 switch (entry->fmt) { 192 case IBMVFC_CMD_FORMAT: 193 entry->op_code = vfc_cmd->iu.cdb[0]; 194 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 195 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 196 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 197 entry->u.end.status = be16_to_cpu(vfc_cmd->status); 198 entry->u.end.error = be16_to_cpu(vfc_cmd->error); 199 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; 200 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; 201 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; 202 break; 203 case IBMVFC_MAD_FORMAT: 204 entry->op_code = be32_to_cpu(mad->opcode); 205 entry->u.end.status = be16_to_cpu(mad->status); 206 break; 207 default: 208 break; 209 210 } 211 } 212 213 #else 214 #define ibmvfc_trc_start(evt) do { } while (0) 215 #define ibmvfc_trc_end(evt) do { } while (0) 216 #endif 217 218 /** 219 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 220 * @status: status / error class 221 * @error: error 222 * 223 * Return value: 224 * index into cmd_status / -EINVAL on failure 225 **/ 226 static int ibmvfc_get_err_index(u16 status, u16 error) 227 { 228 int i; 229 230 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 231 if ((cmd_status[i].status & status) == cmd_status[i].status && 232 cmd_status[i].error == error) 233 return i; 234 235 return -EINVAL; 236 } 237 238 /** 239 * ibmvfc_get_cmd_error - Find the error description for the fcp response 240 * @status: status / error class 241 * @error: error 242 * 243 * Return value: 244 * error description string 245 **/ 246 static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 247 { 248 int rc = ibmvfc_get_err_index(status, error); 249 if (rc >= 0) 250 return cmd_status[rc].name; 251 return unknown_error; 252 } 253 254 /** 255 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 256 * @vfc_cmd: ibmvfc command struct 257 * 258 * Return value: 259 * SCSI result value to return for completed command 260 **/ 261 static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) 262 { 263 int err; 264 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 265 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 266 267 if ((rsp->flags & FCP_RSP_LEN_VALID) && 268 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 269 rsp->data.info.rsp_code)) 270 return DID_ERROR << 16; 271 272 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 273 if (err >= 0) 274 return rsp->scsi_status | (cmd_status[err].result << 16); 275 return rsp->scsi_status | (DID_ERROR << 16); 276 } 277 278 /** 279 * ibmvfc_retry_cmd - Determine if error status is retryable 280 * @status: status / error class 281 * @error: error 282 * 283 * Return value: 284 * 1 if error should be retried / 0 if it should not 285 **/ 286 static int ibmvfc_retry_cmd(u16 status, u16 error) 287 { 288 int rc = ibmvfc_get_err_index(status, error); 289 290 if (rc >= 0) 291 return cmd_status[rc].retry; 292 return 1; 293 } 294 295 static const char *unknown_fc_explain = "unknown fc explain"; 296 297 static const struct { 298 u16 fc_explain; 299 char *name; 300 } ls_explain [] = { 301 { 0x00, "no additional explanation" }, 302 { 0x01, "service parameter error - options" }, 303 { 0x03, "service parameter error - initiator control" }, 304 { 0x05, "service parameter error - recipient control" }, 305 { 0x07, "service parameter error - received data field size" }, 306 { 0x09, "service parameter error - concurrent seq" }, 307 { 0x0B, "service parameter error - credit" }, 308 { 0x0D, "invalid N_Port/F_Port_Name" }, 309 { 0x0E, "invalid node/Fabric Name" }, 310 { 0x0F, "invalid common service parameters" }, 311 { 0x11, "invalid association header" }, 312 { 0x13, "association header required" }, 313 { 0x15, "invalid originator S_ID" }, 314 { 0x17, "invalid OX_ID-RX-ID combination" }, 315 { 0x19, "command (request) already in progress" }, 316 { 0x1E, "N_Port Login requested" }, 317 { 0x1F, "Invalid N_Port_ID" }, 318 }; 319 320 static const struct { 321 u16 fc_explain; 322 char *name; 323 } gs_explain [] = { 324 { 0x00, "no additional explanation" }, 325 { 0x01, "port identifier not registered" }, 326 { 0x02, "port name not registered" }, 327 { 0x03, "node name not registered" }, 328 { 0x04, "class of service not registered" }, 329 { 0x06, "initial process associator not registered" }, 330 { 0x07, "FC-4 TYPEs not registered" }, 331 { 0x08, "symbolic port name not registered" }, 332 { 0x09, "symbolic node name not registered" }, 333 { 0x0A, "port type not registered" }, 334 { 0xF0, "authorization exception" }, 335 { 0xF1, "authentication exception" }, 336 { 0xF2, "data base full" }, 337 { 0xF3, "data base empty" }, 338 { 0xF4, "processing request" }, 339 { 0xF5, "unable to verify connection" }, 340 { 0xF6, "devices not in a common zone" }, 341 }; 342 343 /** 344 * ibmvfc_get_ls_explain - Return the FC Explain description text 345 * @status: FC Explain status 346 * 347 * Returns: 348 * error string 349 **/ 350 static const char *ibmvfc_get_ls_explain(u16 status) 351 { 352 int i; 353 354 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 355 if (ls_explain[i].fc_explain == status) 356 return ls_explain[i].name; 357 358 return unknown_fc_explain; 359 } 360 361 /** 362 * ibmvfc_get_gs_explain - Return the FC Explain description text 363 * @status: FC Explain status 364 * 365 * Returns: 366 * error string 367 **/ 368 static const char *ibmvfc_get_gs_explain(u16 status) 369 { 370 int i; 371 372 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 373 if (gs_explain[i].fc_explain == status) 374 return gs_explain[i].name; 375 376 return unknown_fc_explain; 377 } 378 379 static const struct { 380 enum ibmvfc_fc_type fc_type; 381 char *name; 382 } fc_type [] = { 383 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 384 { IBMVFC_PORT_REJECT, "port reject" }, 385 { IBMVFC_LS_REJECT, "ELS reject" }, 386 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 387 { IBMVFC_PORT_BUSY, "port busy" }, 388 { IBMVFC_BASIC_REJECT, "basic reject" }, 389 }; 390 391 static const char *unknown_fc_type = "unknown fc type"; 392 393 /** 394 * ibmvfc_get_fc_type - Return the FC Type description text 395 * @status: FC Type error status 396 * 397 * Returns: 398 * error string 399 **/ 400 static const char *ibmvfc_get_fc_type(u16 status) 401 { 402 int i; 403 404 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 405 if (fc_type[i].fc_type == status) 406 return fc_type[i].name; 407 408 return unknown_fc_type; 409 } 410 411 /** 412 * ibmvfc_set_tgt_action - Set the next init action for the target 413 * @tgt: ibmvfc target struct 414 * @action: action to perform 415 * 416 **/ 417 static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 418 enum ibmvfc_target_action action) 419 { 420 switch (tgt->action) { 421 case IBMVFC_TGT_ACTION_DEL_RPORT: 422 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) 423 tgt->action = action; 424 case IBMVFC_TGT_ACTION_DELETED_RPORT: 425 break; 426 default: 427 if (action == IBMVFC_TGT_ACTION_DEL_RPORT) 428 tgt->add_rport = 0; 429 tgt->action = action; 430 break; 431 } 432 } 433 434 /** 435 * ibmvfc_set_host_state - Set the state for the host 436 * @vhost: ibmvfc host struct 437 * @state: state to set host to 438 * 439 * Returns: 440 * 0 if state changed / non-zero if not changed 441 **/ 442 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 443 enum ibmvfc_host_state state) 444 { 445 int rc = 0; 446 447 switch (vhost->state) { 448 case IBMVFC_HOST_OFFLINE: 449 rc = -EINVAL; 450 break; 451 default: 452 vhost->state = state; 453 break; 454 } 455 456 return rc; 457 } 458 459 /** 460 * ibmvfc_set_host_action - Set the next init action for the host 461 * @vhost: ibmvfc host struct 462 * @action: action to perform 463 * 464 **/ 465 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 466 enum ibmvfc_host_action action) 467 { 468 switch (action) { 469 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 470 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 471 vhost->action = action; 472 break; 473 case IBMVFC_HOST_ACTION_LOGO_WAIT: 474 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 475 vhost->action = action; 476 break; 477 case IBMVFC_HOST_ACTION_INIT_WAIT: 478 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 479 vhost->action = action; 480 break; 481 case IBMVFC_HOST_ACTION_QUERY: 482 switch (vhost->action) { 483 case IBMVFC_HOST_ACTION_INIT_WAIT: 484 case IBMVFC_HOST_ACTION_NONE: 485 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 486 vhost->action = action; 487 break; 488 default: 489 break; 490 } 491 break; 492 case IBMVFC_HOST_ACTION_TGT_INIT: 493 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 494 vhost->action = action; 495 break; 496 case IBMVFC_HOST_ACTION_INIT: 497 case IBMVFC_HOST_ACTION_TGT_DEL: 498 switch (vhost->action) { 499 case IBMVFC_HOST_ACTION_RESET: 500 case IBMVFC_HOST_ACTION_REENABLE: 501 break; 502 default: 503 vhost->action = action; 504 break; 505 } 506 break; 507 case IBMVFC_HOST_ACTION_LOGO: 508 case IBMVFC_HOST_ACTION_QUERY_TGTS: 509 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 510 case IBMVFC_HOST_ACTION_NONE: 511 case IBMVFC_HOST_ACTION_RESET: 512 case IBMVFC_HOST_ACTION_REENABLE: 513 default: 514 vhost->action = action; 515 break; 516 } 517 } 518 519 /** 520 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 521 * @vhost: ibmvfc host struct 522 * 523 * Return value: 524 * nothing 525 **/ 526 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 527 { 528 if (vhost->action == IBMVFC_HOST_ACTION_NONE) { 529 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 530 scsi_block_requests(vhost->host); 531 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 532 } 533 } else 534 vhost->reinit = 1; 535 536 wake_up(&vhost->work_wait_q); 537 } 538 539 /** 540 * ibmvfc_link_down - Handle a link down event from the adapter 541 * @vhost: ibmvfc host struct 542 * @state: ibmvfc host state to enter 543 * 544 **/ 545 static void ibmvfc_link_down(struct ibmvfc_host *vhost, 546 enum ibmvfc_host_state state) 547 { 548 struct ibmvfc_target *tgt; 549 550 ENTER; 551 scsi_block_requests(vhost->host); 552 list_for_each_entry(tgt, &vhost->targets, queue) 553 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 554 ibmvfc_set_host_state(vhost, state); 555 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 556 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 557 wake_up(&vhost->work_wait_q); 558 LEAVE; 559 } 560 561 /** 562 * ibmvfc_init_host - Start host initialization 563 * @vhost: ibmvfc host struct 564 * 565 * Return value: 566 * nothing 567 **/ 568 static void ibmvfc_init_host(struct ibmvfc_host *vhost) 569 { 570 struct ibmvfc_target *tgt; 571 572 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 573 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 574 dev_err(vhost->dev, 575 "Host initialization retries exceeded. Taking adapter offline\n"); 576 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 577 return; 578 } 579 } 580 581 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 582 memset(vhost->async_crq.msgs, 0, PAGE_SIZE); 583 vhost->async_crq.cur = 0; 584 585 list_for_each_entry(tgt, &vhost->targets, queue) 586 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 587 scsi_block_requests(vhost->host); 588 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 589 vhost->job_step = ibmvfc_npiv_login; 590 wake_up(&vhost->work_wait_q); 591 } 592 } 593 594 /** 595 * ibmvfc_send_crq - Send a CRQ 596 * @vhost: ibmvfc host struct 597 * @word1: the first 64 bits of the data 598 * @word2: the second 64 bits of the data 599 * 600 * Return value: 601 * 0 on success / other on failure 602 **/ 603 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 604 { 605 struct vio_dev *vdev = to_vio_dev(vhost->dev); 606 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 607 } 608 609 /** 610 * ibmvfc_send_crq_init - Send a CRQ init message 611 * @vhost: ibmvfc host struct 612 * 613 * Return value: 614 * 0 on success / other on failure 615 **/ 616 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 617 { 618 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 619 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 620 } 621 622 /** 623 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 624 * @vhost: ibmvfc host struct 625 * 626 * Return value: 627 * 0 on success / other on failure 628 **/ 629 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 630 { 631 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 632 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 633 } 634 635 /** 636 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 637 * @vhost: ibmvfc host struct 638 * 639 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 640 * the crq with the hypervisor. 641 **/ 642 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 643 { 644 long rc = 0; 645 struct vio_dev *vdev = to_vio_dev(vhost->dev); 646 struct ibmvfc_crq_queue *crq = &vhost->crq; 647 648 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 649 free_irq(vdev->irq, vhost); 650 tasklet_kill(&vhost->tasklet); 651 do { 652 if (rc) 653 msleep(100); 654 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 655 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 656 657 vhost->state = IBMVFC_NO_CRQ; 658 vhost->logged_in = 0; 659 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 660 free_page((unsigned long)crq->msgs); 661 } 662 663 /** 664 * ibmvfc_reenable_crq_queue - reenables the CRQ 665 * @vhost: ibmvfc host struct 666 * 667 * Return value: 668 * 0 on success / other on failure 669 **/ 670 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 671 { 672 int rc = 0; 673 struct vio_dev *vdev = to_vio_dev(vhost->dev); 674 675 /* Re-enable the CRQ */ 676 do { 677 if (rc) 678 msleep(100); 679 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 680 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 681 682 if (rc) 683 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 684 685 return rc; 686 } 687 688 /** 689 * ibmvfc_reset_crq - resets a crq after a failure 690 * @vhost: ibmvfc host struct 691 * 692 * Return value: 693 * 0 on success / other on failure 694 **/ 695 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 696 { 697 int rc = 0; 698 unsigned long flags; 699 struct vio_dev *vdev = to_vio_dev(vhost->dev); 700 struct ibmvfc_crq_queue *crq = &vhost->crq; 701 702 /* Close the CRQ */ 703 do { 704 if (rc) 705 msleep(100); 706 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 707 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 708 709 spin_lock_irqsave(vhost->host->host_lock, flags); 710 vhost->state = IBMVFC_NO_CRQ; 711 vhost->logged_in = 0; 712 713 /* Clean out the queue */ 714 memset(crq->msgs, 0, PAGE_SIZE); 715 crq->cur = 0; 716 717 /* And re-open it again */ 718 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 719 crq->msg_token, PAGE_SIZE); 720 721 if (rc == H_CLOSED) 722 /* Adapter is good, but other end is not ready */ 723 dev_warn(vhost->dev, "Partner adapter not ready\n"); 724 else if (rc != 0) 725 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 726 spin_unlock_irqrestore(vhost->host->host_lock, flags); 727 728 return rc; 729 } 730 731 /** 732 * ibmvfc_valid_event - Determines if event is valid. 733 * @pool: event_pool that contains the event 734 * @evt: ibmvfc event to be checked for validity 735 * 736 * Return value: 737 * 1 if event is valid / 0 if event is not valid 738 **/ 739 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 740 struct ibmvfc_event *evt) 741 { 742 int index = evt - pool->events; 743 if (index < 0 || index >= pool->size) /* outside of bounds */ 744 return 0; 745 if (evt != pool->events + index) /* unaligned */ 746 return 0; 747 return 1; 748 } 749 750 /** 751 * ibmvfc_free_event - Free the specified event 752 * @evt: ibmvfc_event to be freed 753 * 754 **/ 755 static void ibmvfc_free_event(struct ibmvfc_event *evt) 756 { 757 struct ibmvfc_host *vhost = evt->vhost; 758 struct ibmvfc_event_pool *pool = &vhost->pool; 759 760 BUG_ON(!ibmvfc_valid_event(pool, evt)); 761 BUG_ON(atomic_inc_return(&evt->free) != 1); 762 list_add_tail(&evt->queue, &vhost->free); 763 } 764 765 /** 766 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 767 * @evt: ibmvfc event struct 768 * 769 * This function does not setup any error status, that must be done 770 * before this function gets called. 771 **/ 772 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 773 { 774 struct scsi_cmnd *cmnd = evt->cmnd; 775 776 if (cmnd) { 777 scsi_dma_unmap(cmnd); 778 cmnd->scsi_done(cmnd); 779 } 780 781 if (evt->eh_comp) 782 complete(evt->eh_comp); 783 784 ibmvfc_free_event(evt); 785 } 786 787 /** 788 * ibmvfc_fail_request - Fail request with specified error code 789 * @evt: ibmvfc event struct 790 * @error_code: error code to fail request with 791 * 792 * Return value: 793 * none 794 **/ 795 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 796 { 797 if (evt->cmnd) { 798 evt->cmnd->result = (error_code << 16); 799 evt->done = ibmvfc_scsi_eh_done; 800 } else 801 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED); 802 803 list_del(&evt->queue); 804 del_timer(&evt->timer); 805 ibmvfc_trc_end(evt); 806 evt->done(evt); 807 } 808 809 /** 810 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 811 * @vhost: ibmvfc host struct 812 * @error_code: error code to fail requests with 813 * 814 * Return value: 815 * none 816 **/ 817 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 818 { 819 struct ibmvfc_event *evt, *pos; 820 821 ibmvfc_dbg(vhost, "Purging all requests\n"); 822 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 823 ibmvfc_fail_request(evt, error_code); 824 } 825 826 /** 827 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 828 * @vhost: struct ibmvfc host to reset 829 **/ 830 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 831 { 832 ibmvfc_purge_requests(vhost, DID_ERROR); 833 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 834 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 835 } 836 837 /** 838 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 839 * @vhost: struct ibmvfc host to reset 840 **/ 841 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 842 { 843 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 844 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 845 scsi_block_requests(vhost->host); 846 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 847 vhost->job_step = ibmvfc_npiv_logout; 848 wake_up(&vhost->work_wait_q); 849 } else 850 ibmvfc_hard_reset_host(vhost); 851 } 852 853 /** 854 * ibmvfc_reset_host - Reset the connection to the server 855 * @vhost: ibmvfc host struct 856 **/ 857 static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 858 { 859 unsigned long flags; 860 861 spin_lock_irqsave(vhost->host->host_lock, flags); 862 __ibmvfc_reset_host(vhost); 863 spin_unlock_irqrestore(vhost->host->host_lock, flags); 864 } 865 866 /** 867 * ibmvfc_retry_host_init - Retry host initialization if allowed 868 * @vhost: ibmvfc host struct 869 * 870 * Returns: 1 if init will be retried / 0 if not 871 * 872 **/ 873 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 874 { 875 int retry = 0; 876 877 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 878 vhost->delay_init = 1; 879 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 880 dev_err(vhost->dev, 881 "Host initialization retries exceeded. Taking adapter offline\n"); 882 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 883 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 884 __ibmvfc_reset_host(vhost); 885 else { 886 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 887 retry = 1; 888 } 889 } 890 891 wake_up(&vhost->work_wait_q); 892 return retry; 893 } 894 895 /** 896 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 897 * @starget: scsi target struct 898 * 899 * Return value: 900 * ibmvfc_target struct / NULL if not found 901 **/ 902 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 903 { 904 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 905 struct ibmvfc_host *vhost = shost_priv(shost); 906 struct ibmvfc_target *tgt; 907 908 list_for_each_entry(tgt, &vhost->targets, queue) 909 if (tgt->target_id == starget->id) { 910 kref_get(&tgt->kref); 911 return tgt; 912 } 913 return NULL; 914 } 915 916 /** 917 * ibmvfc_get_target - Find the specified scsi_target 918 * @starget: scsi target struct 919 * 920 * Return value: 921 * ibmvfc_target struct / NULL if not found 922 **/ 923 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 924 { 925 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 926 struct ibmvfc_target *tgt; 927 unsigned long flags; 928 929 spin_lock_irqsave(shost->host_lock, flags); 930 tgt = __ibmvfc_get_target(starget); 931 spin_unlock_irqrestore(shost->host_lock, flags); 932 return tgt; 933 } 934 935 /** 936 * ibmvfc_get_host_speed - Get host port speed 937 * @shost: scsi host struct 938 * 939 * Return value: 940 * none 941 **/ 942 static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 943 { 944 struct ibmvfc_host *vhost = shost_priv(shost); 945 unsigned long flags; 946 947 spin_lock_irqsave(shost->host_lock, flags); 948 if (vhost->state == IBMVFC_ACTIVE) { 949 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) { 950 case 1: 951 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 952 break; 953 case 2: 954 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 955 break; 956 case 4: 957 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 958 break; 959 case 8: 960 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 961 break; 962 case 10: 963 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 964 break; 965 case 16: 966 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 967 break; 968 default: 969 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 970 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100); 971 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 972 break; 973 } 974 } else 975 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 976 spin_unlock_irqrestore(shost->host_lock, flags); 977 } 978 979 /** 980 * ibmvfc_get_host_port_state - Get host port state 981 * @shost: scsi host struct 982 * 983 * Return value: 984 * none 985 **/ 986 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 987 { 988 struct ibmvfc_host *vhost = shost_priv(shost); 989 unsigned long flags; 990 991 spin_lock_irqsave(shost->host_lock, flags); 992 switch (vhost->state) { 993 case IBMVFC_INITIALIZING: 994 case IBMVFC_ACTIVE: 995 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 996 break; 997 case IBMVFC_LINK_DOWN: 998 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 999 break; 1000 case IBMVFC_LINK_DEAD: 1001 case IBMVFC_HOST_OFFLINE: 1002 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1003 break; 1004 case IBMVFC_HALTED: 1005 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1006 break; 1007 case IBMVFC_NO_CRQ: 1008 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1009 break; 1010 default: 1011 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1012 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1013 break; 1014 } 1015 spin_unlock_irqrestore(shost->host_lock, flags); 1016 } 1017 1018 /** 1019 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1020 * @rport: rport struct 1021 * @timeout: timeout value 1022 * 1023 * Return value: 1024 * none 1025 **/ 1026 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1027 { 1028 if (timeout) 1029 rport->dev_loss_tmo = timeout; 1030 else 1031 rport->dev_loss_tmo = 1; 1032 } 1033 1034 /** 1035 * ibmvfc_release_tgt - Free memory allocated for a target 1036 * @kref: kref struct 1037 * 1038 **/ 1039 static void ibmvfc_release_tgt(struct kref *kref) 1040 { 1041 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1042 kfree(tgt); 1043 } 1044 1045 /** 1046 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1047 * @starget: scsi target struct 1048 * 1049 * Return value: 1050 * none 1051 **/ 1052 static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1053 { 1054 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1055 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1056 if (tgt) 1057 kref_put(&tgt->kref, ibmvfc_release_tgt); 1058 } 1059 1060 /** 1061 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1062 * @starget: scsi target struct 1063 * 1064 * Return value: 1065 * none 1066 **/ 1067 static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1068 { 1069 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1070 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1071 if (tgt) 1072 kref_put(&tgt->kref, ibmvfc_release_tgt); 1073 } 1074 1075 /** 1076 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1077 * @starget: scsi target struct 1078 * 1079 * Return value: 1080 * none 1081 **/ 1082 static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1083 { 1084 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1085 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1086 if (tgt) 1087 kref_put(&tgt->kref, ibmvfc_release_tgt); 1088 } 1089 1090 /** 1091 * ibmvfc_wait_while_resetting - Wait while the host resets 1092 * @vhost: ibmvfc host struct 1093 * 1094 * Return value: 1095 * 0 on success / other on failure 1096 **/ 1097 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1098 { 1099 long timeout = wait_event_timeout(vhost->init_wait_q, 1100 ((vhost->state == IBMVFC_ACTIVE || 1101 vhost->state == IBMVFC_HOST_OFFLINE || 1102 vhost->state == IBMVFC_LINK_DEAD) && 1103 vhost->action == IBMVFC_HOST_ACTION_NONE), 1104 (init_timeout * HZ)); 1105 1106 return timeout ? 0 : -EIO; 1107 } 1108 1109 /** 1110 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1111 * @shost: scsi host struct 1112 * 1113 * Return value: 1114 * 0 on success / other on failure 1115 **/ 1116 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1117 { 1118 struct ibmvfc_host *vhost = shost_priv(shost); 1119 1120 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1121 ibmvfc_reset_host(vhost); 1122 return ibmvfc_wait_while_resetting(vhost); 1123 } 1124 1125 /** 1126 * ibmvfc_gather_partition_info - Gather info about the LPAR 1127 * 1128 * Return value: 1129 * none 1130 **/ 1131 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1132 { 1133 struct device_node *rootdn; 1134 const char *name; 1135 const unsigned int *num; 1136 1137 rootdn = of_find_node_by_path("/"); 1138 if (!rootdn) 1139 return; 1140 1141 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1142 if (name) 1143 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1144 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1145 if (num) 1146 vhost->partition_number = *num; 1147 of_node_put(rootdn); 1148 } 1149 1150 /** 1151 * ibmvfc_set_login_info - Setup info for NPIV login 1152 * @vhost: ibmvfc host struct 1153 * 1154 * Return value: 1155 * none 1156 **/ 1157 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1158 { 1159 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1160 struct device_node *of_node = vhost->dev->of_node; 1161 const char *location; 1162 1163 memset(login_info, 0, sizeof(*login_info)); 1164 1165 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX); 1166 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); 1167 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); 1168 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); 1169 login_info->partition_num = cpu_to_be32(vhost->partition_number); 1170 login_info->vfc_frame_version = cpu_to_be32(1); 1171 login_info->fcp_version = cpu_to_be16(3); 1172 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); 1173 if (vhost->client_migrated) 1174 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); 1175 1176 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ); 1177 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE); 1178 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); 1179 login_info->async.len = cpu_to_be32(vhost->async_crq.size * sizeof(*vhost->async_crq.msgs)); 1180 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1181 strncpy(login_info->device_name, 1182 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1183 1184 location = of_get_property(of_node, "ibm,loc-code", NULL); 1185 location = location ? location : dev_name(vhost->dev); 1186 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1187 } 1188 1189 /** 1190 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1191 * @vhost: ibmvfc host who owns the event pool 1192 * 1193 * Returns zero on success. 1194 **/ 1195 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1196 { 1197 int i; 1198 struct ibmvfc_event_pool *pool = &vhost->pool; 1199 1200 ENTER; 1201 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1202 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1203 if (!pool->events) 1204 return -ENOMEM; 1205 1206 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1207 pool->size * sizeof(*pool->iu_storage), 1208 &pool->iu_token, 0); 1209 1210 if (!pool->iu_storage) { 1211 kfree(pool->events); 1212 return -ENOMEM; 1213 } 1214 1215 for (i = 0; i < pool->size; ++i) { 1216 struct ibmvfc_event *evt = &pool->events[i]; 1217 atomic_set(&evt->free, 1); 1218 evt->crq.valid = 0x80; 1219 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i)); 1220 evt->xfer_iu = pool->iu_storage + i; 1221 evt->vhost = vhost; 1222 evt->ext_list = NULL; 1223 list_add_tail(&evt->queue, &vhost->free); 1224 } 1225 1226 LEAVE; 1227 return 0; 1228 } 1229 1230 /** 1231 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1232 * @vhost: ibmvfc host who owns the event pool 1233 * 1234 **/ 1235 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1236 { 1237 int i; 1238 struct ibmvfc_event_pool *pool = &vhost->pool; 1239 1240 ENTER; 1241 for (i = 0; i < pool->size; ++i) { 1242 list_del(&pool->events[i].queue); 1243 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1244 if (pool->events[i].ext_list) 1245 dma_pool_free(vhost->sg_pool, 1246 pool->events[i].ext_list, 1247 pool->events[i].ext_list_token); 1248 } 1249 1250 kfree(pool->events); 1251 dma_free_coherent(vhost->dev, 1252 pool->size * sizeof(*pool->iu_storage), 1253 pool->iu_storage, pool->iu_token); 1254 LEAVE; 1255 } 1256 1257 /** 1258 * ibmvfc_get_event - Gets the next free event in pool 1259 * @vhost: ibmvfc host struct 1260 * 1261 * Returns a free event from the pool. 1262 **/ 1263 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1264 { 1265 struct ibmvfc_event *evt; 1266 1267 BUG_ON(list_empty(&vhost->free)); 1268 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1269 atomic_set(&evt->free, 0); 1270 list_del(&evt->queue); 1271 return evt; 1272 } 1273 1274 /** 1275 * ibmvfc_init_event - Initialize fields in an event struct that are always 1276 * required. 1277 * @evt: The event 1278 * @done: Routine to call when the event is responded to 1279 * @format: SRP or MAD format 1280 **/ 1281 static void ibmvfc_init_event(struct ibmvfc_event *evt, 1282 void (*done) (struct ibmvfc_event *), u8 format) 1283 { 1284 evt->cmnd = NULL; 1285 evt->sync_iu = NULL; 1286 evt->crq.format = format; 1287 evt->done = done; 1288 evt->eh_comp = NULL; 1289 } 1290 1291 /** 1292 * ibmvfc_map_sg_list - Initialize scatterlist 1293 * @scmd: scsi command struct 1294 * @nseg: number of scatterlist segments 1295 * @md: memory descriptor list to initialize 1296 **/ 1297 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1298 struct srp_direct_buf *md) 1299 { 1300 int i; 1301 struct scatterlist *sg; 1302 1303 scsi_for_each_sg(scmd, sg, nseg, i) { 1304 md[i].va = cpu_to_be64(sg_dma_address(sg)); 1305 md[i].len = cpu_to_be32(sg_dma_len(sg)); 1306 md[i].key = 0; 1307 } 1308 } 1309 1310 /** 1311 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1312 * @scmd: struct scsi_cmnd with the scatterlist 1313 * @evt: ibmvfc event struct 1314 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1315 * @dev: device for which to map dma memory 1316 * 1317 * Returns: 1318 * 0 on success / non-zero on failure 1319 **/ 1320 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1321 struct ibmvfc_event *evt, 1322 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1323 { 1324 1325 int sg_mapped; 1326 struct srp_direct_buf *data = &vfc_cmd->ioba; 1327 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1328 1329 if (cls3_error) 1330 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR); 1331 1332 sg_mapped = scsi_dma_map(scmd); 1333 if (!sg_mapped) { 1334 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC); 1335 return 0; 1336 } else if (unlikely(sg_mapped < 0)) { 1337 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1338 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1339 return sg_mapped; 1340 } 1341 1342 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1343 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE); 1344 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1345 } else { 1346 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ); 1347 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1348 } 1349 1350 if (sg_mapped == 1) { 1351 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1352 return 0; 1353 } 1354 1355 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST); 1356 1357 if (!evt->ext_list) { 1358 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1359 &evt->ext_list_token); 1360 1361 if (!evt->ext_list) { 1362 scsi_dma_unmap(scmd); 1363 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1364 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1365 return -ENOMEM; 1366 } 1367 } 1368 1369 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1370 1371 data->va = cpu_to_be64(evt->ext_list_token); 1372 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf)); 1373 data->key = 0; 1374 return 0; 1375 } 1376 1377 /** 1378 * ibmvfc_timeout - Internal command timeout handler 1379 * @evt: struct ibmvfc_event that timed out 1380 * 1381 * Called when an internally generated command times out 1382 **/ 1383 static void ibmvfc_timeout(struct timer_list *t) 1384 { 1385 struct ibmvfc_event *evt = from_timer(evt, t, timer); 1386 struct ibmvfc_host *vhost = evt->vhost; 1387 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1388 ibmvfc_reset_host(vhost); 1389 } 1390 1391 /** 1392 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1393 * @evt: event to be sent 1394 * @vhost: ibmvfc host struct 1395 * @timeout: timeout in seconds - 0 means do not time command 1396 * 1397 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1398 **/ 1399 static int ibmvfc_send_event(struct ibmvfc_event *evt, 1400 struct ibmvfc_host *vhost, unsigned long timeout) 1401 { 1402 __be64 *crq_as_u64 = (__be64 *) &evt->crq; 1403 int rc; 1404 1405 /* Copy the IU into the transfer area */ 1406 *evt->xfer_iu = evt->iu; 1407 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1408 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); 1409 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1410 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); 1411 else 1412 BUG(); 1413 1414 list_add_tail(&evt->queue, &vhost->sent); 1415 timer_setup(&evt->timer, ibmvfc_timeout, 0); 1416 1417 if (timeout) { 1418 evt->timer.expires = jiffies + (timeout * HZ); 1419 add_timer(&evt->timer); 1420 } 1421 1422 mb(); 1423 1424 if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), 1425 be64_to_cpu(crq_as_u64[1])))) { 1426 list_del(&evt->queue); 1427 del_timer(&evt->timer); 1428 1429 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1430 * Firmware will send a CRQ with a transport event (0xFF) to 1431 * tell this client what has happened to the transport. This 1432 * will be handled in ibmvfc_handle_crq() 1433 */ 1434 if (rc == H_CLOSED) { 1435 if (printk_ratelimit()) 1436 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1437 if (evt->cmnd) 1438 scsi_dma_unmap(evt->cmnd); 1439 ibmvfc_free_event(evt); 1440 return SCSI_MLQUEUE_HOST_BUSY; 1441 } 1442 1443 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1444 if (evt->cmnd) { 1445 evt->cmnd->result = DID_ERROR << 16; 1446 evt->done = ibmvfc_scsi_eh_done; 1447 } else 1448 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); 1449 1450 evt->done(evt); 1451 } else 1452 ibmvfc_trc_start(evt); 1453 1454 return 0; 1455 } 1456 1457 /** 1458 * ibmvfc_log_error - Log an error for the failed command if appropriate 1459 * @evt: ibmvfc event to log 1460 * 1461 **/ 1462 static void ibmvfc_log_error(struct ibmvfc_event *evt) 1463 { 1464 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1465 struct ibmvfc_host *vhost = evt->vhost; 1466 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1467 struct scsi_cmnd *cmnd = evt->cmnd; 1468 const char *err = unknown_error; 1469 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 1470 int logerr = 0; 1471 int rsp_code = 0; 1472 1473 if (index >= 0) { 1474 logerr = cmd_status[index].log; 1475 err = cmd_status[index].name; 1476 } 1477 1478 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1479 return; 1480 1481 if (rsp->flags & FCP_RSP_LEN_VALID) 1482 rsp_code = rsp->data.info.rsp_code; 1483 1484 scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) " 1485 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1486 cmnd->cmnd[0], err, be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error), 1487 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1488 } 1489 1490 /** 1491 * ibmvfc_relogin - Log back into the specified device 1492 * @sdev: scsi device struct 1493 * 1494 **/ 1495 static void ibmvfc_relogin(struct scsi_device *sdev) 1496 { 1497 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1498 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1499 struct ibmvfc_target *tgt; 1500 1501 list_for_each_entry(tgt, &vhost->targets, queue) { 1502 if (rport == tgt->rport) { 1503 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 1504 break; 1505 } 1506 } 1507 1508 ibmvfc_reinit_host(vhost); 1509 } 1510 1511 /** 1512 * ibmvfc_scsi_done - Handle responses from commands 1513 * @evt: ibmvfc event to be handled 1514 * 1515 * Used as a callback when sending scsi cmds. 1516 **/ 1517 static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1518 { 1519 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1520 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1521 struct scsi_cmnd *cmnd = evt->cmnd; 1522 u32 rsp_len = 0; 1523 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); 1524 1525 if (cmnd) { 1526 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) 1527 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); 1528 else if (rsp->flags & FCP_RESID_UNDER) 1529 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); 1530 else 1531 scsi_set_resid(cmnd, 0); 1532 1533 if (vfc_cmd->status) { 1534 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1535 1536 if (rsp->flags & FCP_RSP_LEN_VALID) 1537 rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 1538 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1539 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1540 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1541 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1542 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && 1543 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) 1544 ibmvfc_relogin(cmnd->device); 1545 1546 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1547 cmnd->result = (DID_ERROR << 16); 1548 1549 ibmvfc_log_error(evt); 1550 } 1551 1552 if (!cmnd->result && 1553 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1554 cmnd->result = (DID_ERROR << 16); 1555 1556 scsi_dma_unmap(cmnd); 1557 cmnd->scsi_done(cmnd); 1558 } 1559 1560 if (evt->eh_comp) 1561 complete(evt->eh_comp); 1562 1563 ibmvfc_free_event(evt); 1564 } 1565 1566 /** 1567 * ibmvfc_host_chkready - Check if the host can accept commands 1568 * @vhost: struct ibmvfc host 1569 * 1570 * Returns: 1571 * 1 if host can accept command / 0 if not 1572 **/ 1573 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1574 { 1575 int result = 0; 1576 1577 switch (vhost->state) { 1578 case IBMVFC_LINK_DEAD: 1579 case IBMVFC_HOST_OFFLINE: 1580 result = DID_NO_CONNECT << 16; 1581 break; 1582 case IBMVFC_NO_CRQ: 1583 case IBMVFC_INITIALIZING: 1584 case IBMVFC_HALTED: 1585 case IBMVFC_LINK_DOWN: 1586 result = DID_REQUEUE << 16; 1587 break; 1588 case IBMVFC_ACTIVE: 1589 result = 0; 1590 break; 1591 } 1592 1593 return result; 1594 } 1595 1596 /** 1597 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1598 * @cmnd: struct scsi_cmnd to be executed 1599 * @done: Callback function to be called when cmnd is completed 1600 * 1601 * Returns: 1602 * 0 on success / other on failure 1603 **/ 1604 static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd, 1605 void (*done) (struct scsi_cmnd *)) 1606 { 1607 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1608 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1609 struct ibmvfc_cmd *vfc_cmd; 1610 struct ibmvfc_event *evt; 1611 int rc; 1612 1613 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1614 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1615 cmnd->result = rc; 1616 done(cmnd); 1617 return 0; 1618 } 1619 1620 cmnd->result = (DID_OK << 16); 1621 evt = ibmvfc_get_event(vhost); 1622 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1623 evt->cmnd = cmnd; 1624 cmnd->scsi_done = done; 1625 vfc_cmd = &evt->iu.cmd; 1626 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1627 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 1628 vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp)); 1629 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1630 vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu)); 1631 vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp)); 1632 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata); 1633 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); 1634 vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); 1635 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1636 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1637 1638 if (cmnd->flags & SCMD_TAGGED) { 1639 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag); 1640 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1641 } 1642 1643 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1644 return ibmvfc_send_event(evt, vhost, 0); 1645 1646 ibmvfc_free_event(evt); 1647 if (rc == -ENOMEM) 1648 return SCSI_MLQUEUE_HOST_BUSY; 1649 1650 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1651 scmd_printk(KERN_ERR, cmnd, 1652 "Failed to map DMA buffer for command. rc=%d\n", rc); 1653 1654 cmnd->result = DID_ERROR << 16; 1655 done(cmnd); 1656 return 0; 1657 } 1658 1659 static DEF_SCSI_QCMD(ibmvfc_queuecommand) 1660 1661 /** 1662 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1663 * @evt: ibmvfc event struct 1664 * 1665 **/ 1666 static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1667 { 1668 /* copy the response back */ 1669 if (evt->sync_iu) 1670 *evt->sync_iu = *evt->xfer_iu; 1671 1672 complete(&evt->comp); 1673 } 1674 1675 /** 1676 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 1677 * @evt: struct ibmvfc_event 1678 * 1679 **/ 1680 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 1681 { 1682 struct ibmvfc_host *vhost = evt->vhost; 1683 1684 ibmvfc_free_event(evt); 1685 vhost->aborting_passthru = 0; 1686 dev_info(vhost->dev, "Passthru command cancelled\n"); 1687 } 1688 1689 /** 1690 * ibmvfc_bsg_timeout - Handle a BSG timeout 1691 * @job: struct bsg_job that timed out 1692 * 1693 * Returns: 1694 * 0 on success / other on failure 1695 **/ 1696 static int ibmvfc_bsg_timeout(struct bsg_job *job) 1697 { 1698 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 1699 unsigned long port_id = (unsigned long)job->dd_data; 1700 struct ibmvfc_event *evt; 1701 struct ibmvfc_tmf *tmf; 1702 unsigned long flags; 1703 int rc; 1704 1705 ENTER; 1706 spin_lock_irqsave(vhost->host->host_lock, flags); 1707 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 1708 __ibmvfc_reset_host(vhost); 1709 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1710 return 0; 1711 } 1712 1713 vhost->aborting_passthru = 1; 1714 evt = ibmvfc_get_event(vhost); 1715 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 1716 1717 tmf = &evt->iu.tmf; 1718 memset(tmf, 0, sizeof(*tmf)); 1719 tmf->common.version = cpu_to_be32(1); 1720 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 1721 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 1722 tmf->scsi_id = cpu_to_be64(port_id); 1723 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 1724 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); 1725 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1726 1727 if (rc != 0) { 1728 vhost->aborting_passthru = 0; 1729 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 1730 rc = -EIO; 1731 } else 1732 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 1733 port_id); 1734 1735 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1736 1737 LEAVE; 1738 return rc; 1739 } 1740 1741 /** 1742 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 1743 * @vhost: struct ibmvfc_host to send command 1744 * @port_id: port ID to send command 1745 * 1746 * Returns: 1747 * 0 on success / other on failure 1748 **/ 1749 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 1750 { 1751 struct ibmvfc_port_login *plogi; 1752 struct ibmvfc_target *tgt; 1753 struct ibmvfc_event *evt; 1754 union ibmvfc_iu rsp_iu; 1755 unsigned long flags; 1756 int rc = 0, issue_login = 1; 1757 1758 ENTER; 1759 spin_lock_irqsave(vhost->host->host_lock, flags); 1760 list_for_each_entry(tgt, &vhost->targets, queue) { 1761 if (tgt->scsi_id == port_id) { 1762 issue_login = 0; 1763 break; 1764 } 1765 } 1766 1767 if (!issue_login) 1768 goto unlock_out; 1769 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 1770 goto unlock_out; 1771 1772 evt = ibmvfc_get_event(vhost); 1773 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1774 plogi = &evt->iu.plogi; 1775 memset(plogi, 0, sizeof(*plogi)); 1776 plogi->common.version = cpu_to_be32(1); 1777 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 1778 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 1779 plogi->scsi_id = cpu_to_be64(port_id); 1780 evt->sync_iu = &rsp_iu; 1781 init_completion(&evt->comp); 1782 1783 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1784 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1785 1786 if (rc) 1787 return -EIO; 1788 1789 wait_for_completion(&evt->comp); 1790 1791 if (rsp_iu.plogi.common.status) 1792 rc = -EIO; 1793 1794 spin_lock_irqsave(vhost->host->host_lock, flags); 1795 ibmvfc_free_event(evt); 1796 unlock_out: 1797 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1798 LEAVE; 1799 return rc; 1800 } 1801 1802 /** 1803 * ibmvfc_bsg_request - Handle a BSG request 1804 * @job: struct bsg_job to be executed 1805 * 1806 * Returns: 1807 * 0 on success / other on failure 1808 **/ 1809 static int ibmvfc_bsg_request(struct bsg_job *job) 1810 { 1811 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 1812 struct fc_rport *rport = fc_bsg_to_rport(job); 1813 struct ibmvfc_passthru_mad *mad; 1814 struct ibmvfc_event *evt; 1815 union ibmvfc_iu rsp_iu; 1816 unsigned long flags, port_id = -1; 1817 struct fc_bsg_request *bsg_request = job->request; 1818 struct fc_bsg_reply *bsg_reply = job->reply; 1819 unsigned int code = bsg_request->msgcode; 1820 int rc = 0, req_seg, rsp_seg, issue_login = 0; 1821 u32 fc_flags, rsp_len; 1822 1823 ENTER; 1824 bsg_reply->reply_payload_rcv_len = 0; 1825 if (rport) 1826 port_id = rport->port_id; 1827 1828 switch (code) { 1829 case FC_BSG_HST_ELS_NOLOGIN: 1830 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) | 1831 (bsg_request->rqst_data.h_els.port_id[1] << 8) | 1832 bsg_request->rqst_data.h_els.port_id[2]; 1833 /* fall through */ 1834 case FC_BSG_RPT_ELS: 1835 fc_flags = IBMVFC_FC_ELS; 1836 break; 1837 case FC_BSG_HST_CT: 1838 issue_login = 1; 1839 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) | 1840 (bsg_request->rqst_data.h_ct.port_id[1] << 8) | 1841 bsg_request->rqst_data.h_ct.port_id[2]; 1842 /* fall through */ 1843 case FC_BSG_RPT_CT: 1844 fc_flags = IBMVFC_FC_CT_IU; 1845 break; 1846 default: 1847 return -ENOTSUPP; 1848 } 1849 1850 if (port_id == -1) 1851 return -EINVAL; 1852 if (!mutex_trylock(&vhost->passthru_mutex)) 1853 return -EBUSY; 1854 1855 job->dd_data = (void *)port_id; 1856 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 1857 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1858 1859 if (!req_seg) { 1860 mutex_unlock(&vhost->passthru_mutex); 1861 return -ENOMEM; 1862 } 1863 1864 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 1865 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1866 1867 if (!rsp_seg) { 1868 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1869 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1870 mutex_unlock(&vhost->passthru_mutex); 1871 return -ENOMEM; 1872 } 1873 1874 if (req_seg > 1 || rsp_seg > 1) { 1875 rc = -EINVAL; 1876 goto out; 1877 } 1878 1879 if (issue_login) 1880 rc = ibmvfc_bsg_plogi(vhost, port_id); 1881 1882 spin_lock_irqsave(vhost->host->host_lock, flags); 1883 1884 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 1885 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1886 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1887 goto out; 1888 } 1889 1890 evt = ibmvfc_get_event(vhost); 1891 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1892 mad = &evt->iu.passthru; 1893 1894 memset(mad, 0, sizeof(*mad)); 1895 mad->common.version = cpu_to_be32(1); 1896 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 1897 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 1898 1899 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + 1900 offsetof(struct ibmvfc_passthru_mad, iu)); 1901 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 1902 1903 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); 1904 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); 1905 mad->iu.flags = cpu_to_be32(fc_flags); 1906 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 1907 1908 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); 1909 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); 1910 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); 1911 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); 1912 mad->iu.scsi_id = cpu_to_be64(port_id); 1913 mad->iu.tag = cpu_to_be64((u64)evt); 1914 rsp_len = be32_to_cpu(mad->iu.rsp.len); 1915 1916 evt->sync_iu = &rsp_iu; 1917 init_completion(&evt->comp); 1918 rc = ibmvfc_send_event(evt, vhost, 0); 1919 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1920 1921 if (rc) { 1922 rc = -EIO; 1923 goto out; 1924 } 1925 1926 wait_for_completion(&evt->comp); 1927 1928 if (rsp_iu.passthru.common.status) 1929 rc = -EIO; 1930 else 1931 bsg_reply->reply_payload_rcv_len = rsp_len; 1932 1933 spin_lock_irqsave(vhost->host->host_lock, flags); 1934 ibmvfc_free_event(evt); 1935 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1936 bsg_reply->result = rc; 1937 bsg_job_done(job, bsg_reply->result, 1938 bsg_reply->reply_payload_rcv_len); 1939 rc = 0; 1940 out: 1941 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1942 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1943 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 1944 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1945 mutex_unlock(&vhost->passthru_mutex); 1946 LEAVE; 1947 return rc; 1948 } 1949 1950 /** 1951 * ibmvfc_reset_device - Reset the device with the specified reset type 1952 * @sdev: scsi device to reset 1953 * @type: reset type 1954 * @desc: reset type description for log messages 1955 * 1956 * Returns: 1957 * 0 on success / other on failure 1958 **/ 1959 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1960 { 1961 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1962 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1963 struct ibmvfc_cmd *tmf; 1964 struct ibmvfc_event *evt = NULL; 1965 union ibmvfc_iu rsp_iu; 1966 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1967 int rsp_rc = -EBUSY; 1968 unsigned long flags; 1969 int rsp_code = 0; 1970 1971 spin_lock_irqsave(vhost->host->host_lock, flags); 1972 if (vhost->state == IBMVFC_ACTIVE) { 1973 evt = ibmvfc_get_event(vhost); 1974 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1975 1976 tmf = &evt->iu.cmd; 1977 memset(tmf, 0, sizeof(*tmf)); 1978 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 1979 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); 1980 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1981 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); 1982 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); 1983 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 1984 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); 1985 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1986 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 1987 tmf->iu.tmf_flags = type; 1988 evt->sync_iu = &rsp_iu; 1989 1990 init_completion(&evt->comp); 1991 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1992 } 1993 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1994 1995 if (rsp_rc != 0) { 1996 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 1997 desc, rsp_rc); 1998 return -EIO; 1999 } 2000 2001 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2002 wait_for_completion(&evt->comp); 2003 2004 if (rsp_iu.cmd.status) 2005 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2006 2007 if (rsp_code) { 2008 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2009 rsp_code = fc_rsp->data.info.rsp_code; 2010 2011 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2012 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, 2013 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2014 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, 2015 fc_rsp->scsi_status); 2016 rsp_rc = -EIO; 2017 } else 2018 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2019 2020 spin_lock_irqsave(vhost->host->host_lock, flags); 2021 ibmvfc_free_event(evt); 2022 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2023 return rsp_rc; 2024 } 2025 2026 /** 2027 * ibmvfc_match_rport - Match function for specified remote port 2028 * @evt: ibmvfc event struct 2029 * @device: device to match (rport) 2030 * 2031 * Returns: 2032 * 1 if event matches rport / 0 if event does not match rport 2033 **/ 2034 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2035 { 2036 struct fc_rport *cmd_rport; 2037 2038 if (evt->cmnd) { 2039 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2040 if (cmd_rport == rport) 2041 return 1; 2042 } 2043 return 0; 2044 } 2045 2046 /** 2047 * ibmvfc_match_target - Match function for specified target 2048 * @evt: ibmvfc event struct 2049 * @device: device to match (starget) 2050 * 2051 * Returns: 2052 * 1 if event matches starget / 0 if event does not match starget 2053 **/ 2054 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2055 { 2056 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2057 return 1; 2058 return 0; 2059 } 2060 2061 /** 2062 * ibmvfc_match_lun - Match function for specified LUN 2063 * @evt: ibmvfc event struct 2064 * @device: device to match (sdev) 2065 * 2066 * Returns: 2067 * 1 if event matches sdev / 0 if event does not match sdev 2068 **/ 2069 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2070 { 2071 if (evt->cmnd && evt->cmnd->device == device) 2072 return 1; 2073 return 0; 2074 } 2075 2076 /** 2077 * ibmvfc_wait_for_ops - Wait for ops to complete 2078 * @vhost: ibmvfc host struct 2079 * @device: device to match (starget or sdev) 2080 * @match: match function 2081 * 2082 * Returns: 2083 * SUCCESS / FAILED 2084 **/ 2085 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2086 int (*match) (struct ibmvfc_event *, void *)) 2087 { 2088 struct ibmvfc_event *evt; 2089 DECLARE_COMPLETION_ONSTACK(comp); 2090 int wait; 2091 unsigned long flags; 2092 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2093 2094 ENTER; 2095 do { 2096 wait = 0; 2097 spin_lock_irqsave(vhost->host->host_lock, flags); 2098 list_for_each_entry(evt, &vhost->sent, queue) { 2099 if (match(evt, device)) { 2100 evt->eh_comp = ∁ 2101 wait++; 2102 } 2103 } 2104 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2105 2106 if (wait) { 2107 timeout = wait_for_completion_timeout(&comp, timeout); 2108 2109 if (!timeout) { 2110 wait = 0; 2111 spin_lock_irqsave(vhost->host->host_lock, flags); 2112 list_for_each_entry(evt, &vhost->sent, queue) { 2113 if (match(evt, device)) { 2114 evt->eh_comp = NULL; 2115 wait++; 2116 } 2117 } 2118 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2119 if (wait) 2120 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2121 LEAVE; 2122 return wait ? FAILED : SUCCESS; 2123 } 2124 } 2125 } while (wait); 2126 2127 LEAVE; 2128 return SUCCESS; 2129 } 2130 2131 /** 2132 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2133 * @sdev: scsi device to cancel commands 2134 * @type: type of error recovery being performed 2135 * 2136 * This sends a cancel to the VIOS for the specified device. This does 2137 * NOT send any abort to the actual device. That must be done separately. 2138 * 2139 * Returns: 2140 * 0 on success / other on failure 2141 **/ 2142 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2143 { 2144 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2145 struct scsi_target *starget = scsi_target(sdev); 2146 struct fc_rport *rport = starget_to_rport(starget); 2147 struct ibmvfc_tmf *tmf; 2148 struct ibmvfc_event *evt, *found_evt; 2149 union ibmvfc_iu rsp; 2150 int rsp_rc = -EBUSY; 2151 unsigned long flags; 2152 u16 status; 2153 2154 ENTER; 2155 spin_lock_irqsave(vhost->host->host_lock, flags); 2156 found_evt = NULL; 2157 list_for_each_entry(evt, &vhost->sent, queue) { 2158 if (evt->cmnd && evt->cmnd->device == sdev) { 2159 found_evt = evt; 2160 break; 2161 } 2162 } 2163 2164 if (!found_evt) { 2165 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2166 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2167 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2168 return 0; 2169 } 2170 2171 if (vhost->logged_in) { 2172 evt = ibmvfc_get_event(vhost); 2173 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2174 2175 tmf = &evt->iu.tmf; 2176 memset(tmf, 0, sizeof(*tmf)); 2177 tmf->common.version = cpu_to_be32(1); 2178 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2179 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2180 tmf->scsi_id = cpu_to_be64(rport->port_id); 2181 int_to_scsilun(sdev->lun, &tmf->lun); 2182 if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS)) 2183 type &= ~IBMVFC_TMF_SUPPRESS_ABTS; 2184 if (vhost->state == IBMVFC_ACTIVE) 2185 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); 2186 else 2187 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); 2188 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2189 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); 2190 2191 evt->sync_iu = &rsp; 2192 init_completion(&evt->comp); 2193 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2194 } 2195 2196 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2197 2198 if (rsp_rc != 0) { 2199 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2200 /* If failure is received, the host adapter is most likely going 2201 through reset, return success so the caller will wait for the command 2202 being cancelled to get returned */ 2203 return 0; 2204 } 2205 2206 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2207 2208 wait_for_completion(&evt->comp); 2209 status = be16_to_cpu(rsp.mad_common.status); 2210 spin_lock_irqsave(vhost->host->host_lock, flags); 2211 ibmvfc_free_event(evt); 2212 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2213 2214 if (status != IBMVFC_MAD_SUCCESS) { 2215 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2216 switch (status) { 2217 case IBMVFC_MAD_DRIVER_FAILED: 2218 case IBMVFC_MAD_CRQ_ERROR: 2219 /* Host adapter most likely going through reset, return success to 2220 the caller will wait for the command being cancelled to get returned */ 2221 return 0; 2222 default: 2223 return -EIO; 2224 }; 2225 } 2226 2227 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2228 return 0; 2229 } 2230 2231 /** 2232 * ibmvfc_match_key - Match function for specified cancel key 2233 * @evt: ibmvfc event struct 2234 * @key: cancel key to match 2235 * 2236 * Returns: 2237 * 1 if event matches key / 0 if event does not match key 2238 **/ 2239 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2240 { 2241 unsigned long cancel_key = (unsigned long)key; 2242 2243 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2244 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) 2245 return 1; 2246 return 0; 2247 } 2248 2249 /** 2250 * ibmvfc_match_evt - Match function for specified event 2251 * @evt: ibmvfc event struct 2252 * @match: event to match 2253 * 2254 * Returns: 2255 * 1 if event matches key / 0 if event does not match key 2256 **/ 2257 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) 2258 { 2259 if (evt == match) 2260 return 1; 2261 return 0; 2262 } 2263 2264 /** 2265 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2266 * @sdev: scsi device to abort commands 2267 * 2268 * This sends an Abort Task Set to the VIOS for the specified device. This does 2269 * NOT send any cancel to the VIOS. That must be done separately. 2270 * 2271 * Returns: 2272 * 0 on success / other on failure 2273 **/ 2274 static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2275 { 2276 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2277 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2278 struct ibmvfc_cmd *tmf; 2279 struct ibmvfc_event *evt, *found_evt; 2280 union ibmvfc_iu rsp_iu; 2281 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 2282 int rc, rsp_rc = -EBUSY; 2283 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2284 int rsp_code = 0; 2285 2286 spin_lock_irqsave(vhost->host->host_lock, flags); 2287 found_evt = NULL; 2288 list_for_each_entry(evt, &vhost->sent, queue) { 2289 if (evt->cmnd && evt->cmnd->device == sdev) { 2290 found_evt = evt; 2291 break; 2292 } 2293 } 2294 2295 if (!found_evt) { 2296 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2297 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2298 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2299 return 0; 2300 } 2301 2302 if (vhost->state == IBMVFC_ACTIVE) { 2303 evt = ibmvfc_get_event(vhost); 2304 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2305 2306 tmf = &evt->iu.cmd; 2307 memset(tmf, 0, sizeof(*tmf)); 2308 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 2309 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); 2310 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 2311 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); 2312 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); 2313 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2314 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); 2315 int_to_scsilun(sdev->lun, &tmf->iu.lun); 2316 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2317 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 2318 evt->sync_iu = &rsp_iu; 2319 2320 init_completion(&evt->comp); 2321 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2322 } 2323 2324 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2325 2326 if (rsp_rc != 0) { 2327 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2328 return -EIO; 2329 } 2330 2331 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2332 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2333 2334 if (!timeout) { 2335 rc = ibmvfc_cancel_all(sdev, 0); 2336 if (!rc) { 2337 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2338 if (rc == SUCCESS) 2339 rc = 0; 2340 } 2341 2342 if (rc) { 2343 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2344 ibmvfc_reset_host(vhost); 2345 rsp_rc = -EIO; 2346 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2347 2348 if (rc == SUCCESS) 2349 rsp_rc = 0; 2350 2351 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); 2352 if (rc != SUCCESS) { 2353 spin_lock_irqsave(vhost->host->host_lock, flags); 2354 ibmvfc_hard_reset_host(vhost); 2355 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2356 rsp_rc = 0; 2357 } 2358 2359 goto out; 2360 } 2361 } 2362 2363 if (rsp_iu.cmd.status) 2364 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2365 2366 if (rsp_code) { 2367 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2368 rsp_code = fc_rsp->data.info.rsp_code; 2369 2370 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2371 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2372 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2373 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, 2374 fc_rsp->scsi_status); 2375 rsp_rc = -EIO; 2376 } else 2377 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2378 2379 out: 2380 spin_lock_irqsave(vhost->host->host_lock, flags); 2381 ibmvfc_free_event(evt); 2382 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2383 return rsp_rc; 2384 } 2385 2386 /** 2387 * ibmvfc_eh_abort_handler - Abort a command 2388 * @cmd: scsi command to abort 2389 * 2390 * Returns: 2391 * SUCCESS / FAST_IO_FAIL / FAILED 2392 **/ 2393 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2394 { 2395 struct scsi_device *sdev = cmd->device; 2396 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2397 int cancel_rc, block_rc; 2398 int rc = FAILED; 2399 2400 ENTER; 2401 block_rc = fc_block_scsi_eh(cmd); 2402 ibmvfc_wait_while_resetting(vhost); 2403 if (block_rc != FAST_IO_FAIL) { 2404 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2405 ibmvfc_abort_task_set(sdev); 2406 } else 2407 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2408 2409 if (!cancel_rc) 2410 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2411 2412 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2413 rc = FAST_IO_FAIL; 2414 2415 LEAVE; 2416 return rc; 2417 } 2418 2419 /** 2420 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2421 * @cmd: scsi command struct 2422 * 2423 * Returns: 2424 * SUCCESS / FAST_IO_FAIL / FAILED 2425 **/ 2426 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2427 { 2428 struct scsi_device *sdev = cmd->device; 2429 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2430 int cancel_rc, block_rc, reset_rc = 0; 2431 int rc = FAILED; 2432 2433 ENTER; 2434 block_rc = fc_block_scsi_eh(cmd); 2435 ibmvfc_wait_while_resetting(vhost); 2436 if (block_rc != FAST_IO_FAIL) { 2437 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2438 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2439 } else 2440 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2441 2442 if (!cancel_rc && !reset_rc) 2443 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2444 2445 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2446 rc = FAST_IO_FAIL; 2447 2448 LEAVE; 2449 return rc; 2450 } 2451 2452 /** 2453 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function 2454 * @sdev: scsi device struct 2455 * @data: return code 2456 * 2457 **/ 2458 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) 2459 { 2460 unsigned long *rc = data; 2461 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2462 } 2463 2464 /** 2465 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2466 * @sdev: scsi device struct 2467 * @data: return code 2468 * 2469 **/ 2470 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2471 { 2472 unsigned long *rc = data; 2473 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2474 } 2475 2476 /** 2477 * ibmvfc_eh_target_reset_handler - Reset the target 2478 * @cmd: scsi command struct 2479 * 2480 * Returns: 2481 * SUCCESS / FAST_IO_FAIL / FAILED 2482 **/ 2483 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2484 { 2485 struct scsi_device *sdev = cmd->device; 2486 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2487 struct scsi_target *starget = scsi_target(sdev); 2488 int block_rc; 2489 int reset_rc = 0; 2490 int rc = FAILED; 2491 unsigned long cancel_rc = 0; 2492 2493 ENTER; 2494 block_rc = fc_block_scsi_eh(cmd); 2495 ibmvfc_wait_while_resetting(vhost); 2496 if (block_rc != FAST_IO_FAIL) { 2497 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2498 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2499 } else 2500 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); 2501 2502 if (!cancel_rc && !reset_rc) 2503 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2504 2505 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2506 rc = FAST_IO_FAIL; 2507 2508 LEAVE; 2509 return rc; 2510 } 2511 2512 /** 2513 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2514 * @cmd: struct scsi_cmnd having problems 2515 * 2516 **/ 2517 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2518 { 2519 int rc; 2520 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2521 2522 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2523 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2524 2525 return rc ? FAILED : SUCCESS; 2526 } 2527 2528 /** 2529 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2530 * @rport: rport struct 2531 * 2532 * Return value: 2533 * none 2534 **/ 2535 static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2536 { 2537 struct Scsi_Host *shost = rport_to_shost(rport); 2538 struct ibmvfc_host *vhost = shost_priv(shost); 2539 struct fc_rport *dev_rport; 2540 struct scsi_device *sdev; 2541 unsigned long rc; 2542 2543 ENTER; 2544 shost_for_each_device(sdev, shost) { 2545 dev_rport = starget_to_rport(scsi_target(sdev)); 2546 if (dev_rport != rport) 2547 continue; 2548 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2549 } 2550 2551 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 2552 2553 if (rc == FAILED) 2554 ibmvfc_issue_fc_host_lip(shost); 2555 LEAVE; 2556 } 2557 2558 static const struct ibmvfc_async_desc ae_desc [] = { 2559 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2560 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2561 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2562 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2563 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2564 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, 2565 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, 2566 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, 2567 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, 2568 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, 2569 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, 2570 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, 2571 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, 2572 }; 2573 2574 static const struct ibmvfc_async_desc unknown_ae = { 2575 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL 2576 }; 2577 2578 /** 2579 * ibmvfc_get_ae_desc - Get text description for async event 2580 * @ae: async event 2581 * 2582 **/ 2583 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 2584 { 2585 int i; 2586 2587 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2588 if (ae_desc[i].ae == ae) 2589 return &ae_desc[i]; 2590 2591 return &unknown_ae; 2592 } 2593 2594 static const struct { 2595 enum ibmvfc_ae_link_state state; 2596 const char *desc; 2597 } link_desc [] = { 2598 { IBMVFC_AE_LS_LINK_UP, " link up" }, 2599 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 2600 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 2601 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 2602 }; 2603 2604 /** 2605 * ibmvfc_get_link_state - Get text description for link state 2606 * @state: link state 2607 * 2608 **/ 2609 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 2610 { 2611 int i; 2612 2613 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 2614 if (link_desc[i].state == state) 2615 return link_desc[i].desc; 2616 2617 return ""; 2618 } 2619 2620 /** 2621 * ibmvfc_handle_async - Handle an async event from the adapter 2622 * @crq: crq to process 2623 * @vhost: ibmvfc host struct 2624 * 2625 **/ 2626 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2627 struct ibmvfc_host *vhost) 2628 { 2629 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); 2630 struct ibmvfc_target *tgt; 2631 2632 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 2633 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id), 2634 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name), 2635 ibmvfc_get_link_state(crq->link_state)); 2636 2637 switch (be64_to_cpu(crq->event)) { 2638 case IBMVFC_AE_RESUME: 2639 switch (crq->link_state) { 2640 case IBMVFC_AE_LS_LINK_DOWN: 2641 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2642 break; 2643 case IBMVFC_AE_LS_LINK_DEAD: 2644 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2645 break; 2646 case IBMVFC_AE_LS_LINK_UP: 2647 case IBMVFC_AE_LS_LINK_BOUNCED: 2648 default: 2649 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2650 vhost->delay_init = 1; 2651 __ibmvfc_reset_host(vhost); 2652 break; 2653 } 2654 2655 break; 2656 case IBMVFC_AE_LINK_UP: 2657 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2658 vhost->delay_init = 1; 2659 __ibmvfc_reset_host(vhost); 2660 break; 2661 case IBMVFC_AE_SCN_FABRIC: 2662 case IBMVFC_AE_SCN_DOMAIN: 2663 vhost->events_to_log |= IBMVFC_AE_RSCN; 2664 if (vhost->state < IBMVFC_HALTED) { 2665 vhost->delay_init = 1; 2666 __ibmvfc_reset_host(vhost); 2667 } 2668 break; 2669 case IBMVFC_AE_SCN_NPORT: 2670 case IBMVFC_AE_SCN_GROUP: 2671 vhost->events_to_log |= IBMVFC_AE_RSCN; 2672 ibmvfc_reinit_host(vhost); 2673 break; 2674 case IBMVFC_AE_ELS_LOGO: 2675 case IBMVFC_AE_ELS_PRLO: 2676 case IBMVFC_AE_ELS_PLOGI: 2677 list_for_each_entry(tgt, &vhost->targets, queue) { 2678 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 2679 break; 2680 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) 2681 continue; 2682 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) 2683 continue; 2684 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) 2685 continue; 2686 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) 2687 tgt->logo_rcvd = 1; 2688 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { 2689 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2690 ibmvfc_reinit_host(vhost); 2691 } 2692 } 2693 break; 2694 case IBMVFC_AE_LINK_DOWN: 2695 case IBMVFC_AE_ADAPTER_FAILED: 2696 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2697 break; 2698 case IBMVFC_AE_LINK_DEAD: 2699 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2700 break; 2701 case IBMVFC_AE_HALT: 2702 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2703 break; 2704 default: 2705 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2706 break; 2707 } 2708 } 2709 2710 /** 2711 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2712 * @crq: Command/Response queue 2713 * @vhost: ibmvfc host struct 2714 * 2715 **/ 2716 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2717 { 2718 long rc; 2719 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 2720 2721 switch (crq->valid) { 2722 case IBMVFC_CRQ_INIT_RSP: 2723 switch (crq->format) { 2724 case IBMVFC_CRQ_INIT: 2725 dev_info(vhost->dev, "Partner initialized\n"); 2726 /* Send back a response */ 2727 rc = ibmvfc_send_crq_init_complete(vhost); 2728 if (rc == 0) 2729 ibmvfc_init_host(vhost); 2730 else 2731 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2732 break; 2733 case IBMVFC_CRQ_INIT_COMPLETE: 2734 dev_info(vhost->dev, "Partner initialization complete\n"); 2735 ibmvfc_init_host(vhost); 2736 break; 2737 default: 2738 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2739 } 2740 return; 2741 case IBMVFC_CRQ_XPORT_EVENT: 2742 vhost->state = IBMVFC_NO_CRQ; 2743 vhost->logged_in = 0; 2744 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2745 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2746 /* We need to re-setup the interpartition connection */ 2747 dev_info(vhost->dev, "Partition migrated, Re-enabling adapter\n"); 2748 vhost->client_migrated = 1; 2749 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2750 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2751 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 2752 } else if (crq->format == IBMVFC_PARTNER_FAILED || crq->format == IBMVFC_PARTNER_DEREGISTER) { 2753 dev_err(vhost->dev, "Host partner adapter deregistered or failed (rc=%d)\n", crq->format); 2754 ibmvfc_purge_requests(vhost, DID_ERROR); 2755 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2756 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 2757 } else { 2758 dev_err(vhost->dev, "Received unknown transport event from partner (rc=%d)\n", crq->format); 2759 } 2760 return; 2761 case IBMVFC_CRQ_CMD_RSP: 2762 break; 2763 default: 2764 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2765 return; 2766 } 2767 2768 if (crq->format == IBMVFC_ASYNC_EVENT) 2769 return; 2770 2771 /* The only kind of payload CRQs we should get are responses to 2772 * things we send. Make sure this response is to something we 2773 * actually sent 2774 */ 2775 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2776 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2777 crq->ioba); 2778 return; 2779 } 2780 2781 if (unlikely(atomic_read(&evt->free))) { 2782 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2783 crq->ioba); 2784 return; 2785 } 2786 2787 del_timer(&evt->timer); 2788 list_del(&evt->queue); 2789 ibmvfc_trc_end(evt); 2790 evt->done(evt); 2791 } 2792 2793 /** 2794 * ibmvfc_scan_finished - Check if the device scan is done. 2795 * @shost: scsi host struct 2796 * @time: current elapsed time 2797 * 2798 * Returns: 2799 * 0 if scan is not done / 1 if scan is done 2800 **/ 2801 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2802 { 2803 unsigned long flags; 2804 struct ibmvfc_host *vhost = shost_priv(shost); 2805 int done = 0; 2806 2807 spin_lock_irqsave(shost->host_lock, flags); 2808 if (time >= (init_timeout * HZ)) { 2809 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2810 "continuing initialization\n", init_timeout); 2811 done = 1; 2812 } 2813 2814 if (vhost->scan_complete) 2815 done = 1; 2816 spin_unlock_irqrestore(shost->host_lock, flags); 2817 return done; 2818 } 2819 2820 /** 2821 * ibmvfc_slave_alloc - Setup the device's task set value 2822 * @sdev: struct scsi_device device to configure 2823 * 2824 * Set the device's task set value so that error handling works as 2825 * expected. 2826 * 2827 * Returns: 2828 * 0 on success / -ENXIO if device does not exist 2829 **/ 2830 static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2831 { 2832 struct Scsi_Host *shost = sdev->host; 2833 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2834 struct ibmvfc_host *vhost = shost_priv(shost); 2835 unsigned long flags = 0; 2836 2837 if (!rport || fc_remote_port_chkready(rport)) 2838 return -ENXIO; 2839 2840 spin_lock_irqsave(shost->host_lock, flags); 2841 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2842 spin_unlock_irqrestore(shost->host_lock, flags); 2843 return 0; 2844 } 2845 2846 /** 2847 * ibmvfc_target_alloc - Setup the target's task set value 2848 * @starget: struct scsi_target 2849 * 2850 * Set the target's task set value so that error handling works as 2851 * expected. 2852 * 2853 * Returns: 2854 * 0 on success / -ENXIO if device does not exist 2855 **/ 2856 static int ibmvfc_target_alloc(struct scsi_target *starget) 2857 { 2858 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2859 struct ibmvfc_host *vhost = shost_priv(shost); 2860 unsigned long flags = 0; 2861 2862 spin_lock_irqsave(shost->host_lock, flags); 2863 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2864 spin_unlock_irqrestore(shost->host_lock, flags); 2865 return 0; 2866 } 2867 2868 /** 2869 * ibmvfc_slave_configure - Configure the device 2870 * @sdev: struct scsi_device device to configure 2871 * 2872 * Enable allow_restart for a device if it is a disk. Adjust the 2873 * queue_depth here also. 2874 * 2875 * Returns: 2876 * 0 2877 **/ 2878 static int ibmvfc_slave_configure(struct scsi_device *sdev) 2879 { 2880 struct Scsi_Host *shost = sdev->host; 2881 unsigned long flags = 0; 2882 2883 spin_lock_irqsave(shost->host_lock, flags); 2884 if (sdev->type == TYPE_DISK) 2885 sdev->allow_restart = 1; 2886 spin_unlock_irqrestore(shost->host_lock, flags); 2887 return 0; 2888 } 2889 2890 /** 2891 * ibmvfc_change_queue_depth - Change the device's queue depth 2892 * @sdev: scsi device struct 2893 * @qdepth: depth to set 2894 * @reason: calling context 2895 * 2896 * Return value: 2897 * actual depth set 2898 **/ 2899 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 2900 { 2901 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2902 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2903 2904 return scsi_change_queue_depth(sdev, qdepth); 2905 } 2906 2907 static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2908 struct device_attribute *attr, char *buf) 2909 { 2910 struct Scsi_Host *shost = class_to_shost(dev); 2911 struct ibmvfc_host *vhost = shost_priv(shost); 2912 2913 return snprintf(buf, PAGE_SIZE, "%s\n", 2914 vhost->login_buf->resp.partition_name); 2915 } 2916 2917 static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2918 struct device_attribute *attr, char *buf) 2919 { 2920 struct Scsi_Host *shost = class_to_shost(dev); 2921 struct ibmvfc_host *vhost = shost_priv(shost); 2922 2923 return snprintf(buf, PAGE_SIZE, "%s\n", 2924 vhost->login_buf->resp.device_name); 2925 } 2926 2927 static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2928 struct device_attribute *attr, char *buf) 2929 { 2930 struct Scsi_Host *shost = class_to_shost(dev); 2931 struct ibmvfc_host *vhost = shost_priv(shost); 2932 2933 return snprintf(buf, PAGE_SIZE, "%s\n", 2934 vhost->login_buf->resp.port_loc_code); 2935 } 2936 2937 static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2938 struct device_attribute *attr, char *buf) 2939 { 2940 struct Scsi_Host *shost = class_to_shost(dev); 2941 struct ibmvfc_host *vhost = shost_priv(shost); 2942 2943 return snprintf(buf, PAGE_SIZE, "%s\n", 2944 vhost->login_buf->resp.drc_name); 2945 } 2946 2947 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2948 struct device_attribute *attr, char *buf) 2949 { 2950 struct Scsi_Host *shost = class_to_shost(dev); 2951 struct ibmvfc_host *vhost = shost_priv(shost); 2952 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2953 } 2954 2955 static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 2956 struct device_attribute *attr, char *buf) 2957 { 2958 struct Scsi_Host *shost = class_to_shost(dev); 2959 struct ibmvfc_host *vhost = shost_priv(shost); 2960 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); 2961 } 2962 2963 /** 2964 * ibmvfc_show_log_level - Show the adapter's error logging level 2965 * @dev: class device struct 2966 * @buf: buffer 2967 * 2968 * Return value: 2969 * number of bytes printed to buffer 2970 **/ 2971 static ssize_t ibmvfc_show_log_level(struct device *dev, 2972 struct device_attribute *attr, char *buf) 2973 { 2974 struct Scsi_Host *shost = class_to_shost(dev); 2975 struct ibmvfc_host *vhost = shost_priv(shost); 2976 unsigned long flags = 0; 2977 int len; 2978 2979 spin_lock_irqsave(shost->host_lock, flags); 2980 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2981 spin_unlock_irqrestore(shost->host_lock, flags); 2982 return len; 2983 } 2984 2985 /** 2986 * ibmvfc_store_log_level - Change the adapter's error logging level 2987 * @dev: class device struct 2988 * @buf: buffer 2989 * 2990 * Return value: 2991 * number of bytes printed to buffer 2992 **/ 2993 static ssize_t ibmvfc_store_log_level(struct device *dev, 2994 struct device_attribute *attr, 2995 const char *buf, size_t count) 2996 { 2997 struct Scsi_Host *shost = class_to_shost(dev); 2998 struct ibmvfc_host *vhost = shost_priv(shost); 2999 unsigned long flags = 0; 3000 3001 spin_lock_irqsave(shost->host_lock, flags); 3002 vhost->log_level = simple_strtoul(buf, NULL, 10); 3003 spin_unlock_irqrestore(shost->host_lock, flags); 3004 return strlen(buf); 3005 } 3006 3007 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 3008 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 3009 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 3010 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 3011 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 3012 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 3013 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 3014 ibmvfc_show_log_level, ibmvfc_store_log_level); 3015 3016 #ifdef CONFIG_SCSI_IBMVFC_TRACE 3017 /** 3018 * ibmvfc_read_trace - Dump the adapter trace 3019 * @filp: open sysfs file 3020 * @kobj: kobject struct 3021 * @bin_attr: bin_attribute struct 3022 * @buf: buffer 3023 * @off: offset 3024 * @count: buffer size 3025 * 3026 * Return value: 3027 * number of bytes printed to buffer 3028 **/ 3029 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 3030 struct bin_attribute *bin_attr, 3031 char *buf, loff_t off, size_t count) 3032 { 3033 struct device *dev = container_of(kobj, struct device, kobj); 3034 struct Scsi_Host *shost = class_to_shost(dev); 3035 struct ibmvfc_host *vhost = shost_priv(shost); 3036 unsigned long flags = 0; 3037 int size = IBMVFC_TRACE_SIZE; 3038 char *src = (char *)vhost->trace; 3039 3040 if (off > size) 3041 return 0; 3042 if (off + count > size) { 3043 size -= off; 3044 count = size; 3045 } 3046 3047 spin_lock_irqsave(shost->host_lock, flags); 3048 memcpy(buf, &src[off], count); 3049 spin_unlock_irqrestore(shost->host_lock, flags); 3050 return count; 3051 } 3052 3053 static struct bin_attribute ibmvfc_trace_attr = { 3054 .attr = { 3055 .name = "trace", 3056 .mode = S_IRUGO, 3057 }, 3058 .size = 0, 3059 .read = ibmvfc_read_trace, 3060 }; 3061 #endif 3062 3063 static struct device_attribute *ibmvfc_attrs[] = { 3064 &dev_attr_partition_name, 3065 &dev_attr_device_name, 3066 &dev_attr_port_loc_code, 3067 &dev_attr_drc_name, 3068 &dev_attr_npiv_version, 3069 &dev_attr_capabilities, 3070 &dev_attr_log_level, 3071 NULL 3072 }; 3073 3074 static struct scsi_host_template driver_template = { 3075 .module = THIS_MODULE, 3076 .name = "IBM POWER Virtual FC Adapter", 3077 .proc_name = IBMVFC_NAME, 3078 .queuecommand = ibmvfc_queuecommand, 3079 .eh_timed_out = fc_eh_timed_out, 3080 .eh_abort_handler = ibmvfc_eh_abort_handler, 3081 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3082 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3083 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3084 .slave_alloc = ibmvfc_slave_alloc, 3085 .slave_configure = ibmvfc_slave_configure, 3086 .target_alloc = ibmvfc_target_alloc, 3087 .scan_finished = ibmvfc_scan_finished, 3088 .change_queue_depth = ibmvfc_change_queue_depth, 3089 .cmd_per_lun = 16, 3090 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3091 .this_id = -1, 3092 .sg_tablesize = SG_ALL, 3093 .max_sectors = IBMVFC_MAX_SECTORS, 3094 .shost_attrs = ibmvfc_attrs, 3095 .track_queue_depth = 1, 3096 }; 3097 3098 /** 3099 * ibmvfc_next_async_crq - Returns the next entry in async queue 3100 * @vhost: ibmvfc host struct 3101 * 3102 * Returns: 3103 * Pointer to next entry in queue / NULL if empty 3104 **/ 3105 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3106 { 3107 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 3108 struct ibmvfc_async_crq *crq; 3109 3110 crq = &async_crq->msgs[async_crq->cur]; 3111 if (crq->valid & 0x80) { 3112 if (++async_crq->cur == async_crq->size) 3113 async_crq->cur = 0; 3114 rmb(); 3115 } else 3116 crq = NULL; 3117 3118 return crq; 3119 } 3120 3121 /** 3122 * ibmvfc_next_crq - Returns the next entry in message queue 3123 * @vhost: ibmvfc host struct 3124 * 3125 * Returns: 3126 * Pointer to next entry in queue / NULL if empty 3127 **/ 3128 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3129 { 3130 struct ibmvfc_crq_queue *queue = &vhost->crq; 3131 struct ibmvfc_crq *crq; 3132 3133 crq = &queue->msgs[queue->cur]; 3134 if (crq->valid & 0x80) { 3135 if (++queue->cur == queue->size) 3136 queue->cur = 0; 3137 rmb(); 3138 } else 3139 crq = NULL; 3140 3141 return crq; 3142 } 3143 3144 /** 3145 * ibmvfc_interrupt - Interrupt handler 3146 * @irq: number of irq to handle, not used 3147 * @dev_instance: ibmvfc_host that received interrupt 3148 * 3149 * Returns: 3150 * IRQ_HANDLED 3151 **/ 3152 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3153 { 3154 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3155 unsigned long flags; 3156 3157 spin_lock_irqsave(vhost->host->host_lock, flags); 3158 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3159 tasklet_schedule(&vhost->tasklet); 3160 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3161 return IRQ_HANDLED; 3162 } 3163 3164 /** 3165 * ibmvfc_tasklet - Interrupt handler tasklet 3166 * @data: ibmvfc host struct 3167 * 3168 * Returns: 3169 * Nothing 3170 **/ 3171 static void ibmvfc_tasklet(void *data) 3172 { 3173 struct ibmvfc_host *vhost = data; 3174 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3175 struct ibmvfc_crq *crq; 3176 struct ibmvfc_async_crq *async; 3177 unsigned long flags; 3178 int done = 0; 3179 3180 spin_lock_irqsave(vhost->host->host_lock, flags); 3181 while (!done) { 3182 /* Pull all the valid messages off the async CRQ */ 3183 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3184 ibmvfc_handle_async(async, vhost); 3185 async->valid = 0; 3186 wmb(); 3187 } 3188 3189 /* Pull all the valid messages off the CRQ */ 3190 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3191 ibmvfc_handle_crq(crq, vhost); 3192 crq->valid = 0; 3193 wmb(); 3194 } 3195 3196 vio_enable_interrupts(vdev); 3197 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3198 vio_disable_interrupts(vdev); 3199 ibmvfc_handle_async(async, vhost); 3200 async->valid = 0; 3201 wmb(); 3202 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3203 vio_disable_interrupts(vdev); 3204 ibmvfc_handle_crq(crq, vhost); 3205 crq->valid = 0; 3206 wmb(); 3207 } else 3208 done = 1; 3209 } 3210 3211 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3212 } 3213 3214 /** 3215 * ibmvfc_init_tgt - Set the next init job step for the target 3216 * @tgt: ibmvfc target struct 3217 * @job_step: job step to perform 3218 * 3219 **/ 3220 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3221 void (*job_step) (struct ibmvfc_target *)) 3222 { 3223 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 3224 tgt->job_step = job_step; 3225 wake_up(&tgt->vhost->work_wait_q); 3226 } 3227 3228 /** 3229 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3230 * @tgt: ibmvfc target struct 3231 * @job_step: initialization job step 3232 * 3233 * Returns: 1 if step will be retried / 0 if not 3234 * 3235 **/ 3236 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3237 void (*job_step) (struct ibmvfc_target *)) 3238 { 3239 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3240 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3241 wake_up(&tgt->vhost->work_wait_q); 3242 return 0; 3243 } else 3244 ibmvfc_init_tgt(tgt, job_step); 3245 return 1; 3246 } 3247 3248 /* Defined in FC-LS */ 3249 static const struct { 3250 int code; 3251 int retry; 3252 int logged_in; 3253 } prli_rsp [] = { 3254 { 0, 1, 0 }, 3255 { 1, 0, 1 }, 3256 { 2, 1, 0 }, 3257 { 3, 1, 0 }, 3258 { 4, 0, 0 }, 3259 { 5, 0, 0 }, 3260 { 6, 0, 1 }, 3261 { 7, 0, 0 }, 3262 { 8, 1, 0 }, 3263 }; 3264 3265 /** 3266 * ibmvfc_get_prli_rsp - Find PRLI response index 3267 * @flags: PRLI response flags 3268 * 3269 **/ 3270 static int ibmvfc_get_prli_rsp(u16 flags) 3271 { 3272 int i; 3273 int code = (flags & 0x0f00) >> 8; 3274 3275 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3276 if (prli_rsp[i].code == code) 3277 return i; 3278 3279 return 0; 3280 } 3281 3282 /** 3283 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3284 * @evt: ibmvfc event struct 3285 * 3286 **/ 3287 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3288 { 3289 struct ibmvfc_target *tgt = evt->tgt; 3290 struct ibmvfc_host *vhost = evt->vhost; 3291 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3292 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3293 u32 status = be16_to_cpu(rsp->common.status); 3294 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3295 3296 vhost->discovery_threads--; 3297 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3298 switch (status) { 3299 case IBMVFC_MAD_SUCCESS: 3300 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3301 parms->type, parms->flags, parms->service_parms); 3302 3303 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3304 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); 3305 if (prli_rsp[index].logged_in) { 3306 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { 3307 tgt->need_login = 0; 3308 tgt->ids.roles = 0; 3309 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) 3310 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3311 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) 3312 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3313 tgt->add_rport = 1; 3314 } else 3315 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3316 } else if (prli_rsp[index].retry) 3317 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3318 else 3319 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3320 } else 3321 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3322 break; 3323 case IBMVFC_MAD_DRIVER_FAILED: 3324 break; 3325 case IBMVFC_MAD_CRQ_ERROR: 3326 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3327 break; 3328 case IBMVFC_MAD_FAILED: 3329 default: 3330 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && 3331 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) 3332 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3333 else if (tgt->logo_rcvd) 3334 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3335 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3336 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3337 else 3338 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3339 3340 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3341 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3342 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), status); 3343 break; 3344 } 3345 3346 kref_put(&tgt->kref, ibmvfc_release_tgt); 3347 ibmvfc_free_event(evt); 3348 wake_up(&vhost->work_wait_q); 3349 } 3350 3351 /** 3352 * ibmvfc_tgt_send_prli - Send a process login 3353 * @tgt: ibmvfc target struct 3354 * 3355 **/ 3356 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3357 { 3358 struct ibmvfc_process_login *prli; 3359 struct ibmvfc_host *vhost = tgt->vhost; 3360 struct ibmvfc_event *evt; 3361 3362 if (vhost->discovery_threads >= disc_threads) 3363 return; 3364 3365 kref_get(&tgt->kref); 3366 evt = ibmvfc_get_event(vhost); 3367 vhost->discovery_threads++; 3368 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 3369 evt->tgt = tgt; 3370 prli = &evt->iu.prli; 3371 memset(prli, 0, sizeof(*prli)); 3372 prli->common.version = cpu_to_be32(1); 3373 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); 3374 prli->common.length = cpu_to_be16(sizeof(*prli)); 3375 prli->scsi_id = cpu_to_be64(tgt->scsi_id); 3376 3377 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 3378 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); 3379 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); 3380 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED); 3381 3382 if (cls3_error) 3383 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY); 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)), 3441 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), 3442 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), 3443 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status); 3444 break; 3445 } 3446 3447 kref_put(&tgt->kref, ibmvfc_release_tgt); 3448 ibmvfc_free_event(evt); 3449 wake_up(&vhost->work_wait_q); 3450 } 3451 3452 /** 3453 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3454 * @tgt: ibmvfc target struct 3455 * 3456 **/ 3457 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3458 { 3459 struct ibmvfc_port_login *plogi; 3460 struct ibmvfc_host *vhost = tgt->vhost; 3461 struct ibmvfc_event *evt; 3462 3463 if (vhost->discovery_threads >= disc_threads) 3464 return; 3465 3466 kref_get(&tgt->kref); 3467 tgt->logo_rcvd = 0; 3468 evt = ibmvfc_get_event(vhost); 3469 vhost->discovery_threads++; 3470 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3471 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3472 evt->tgt = tgt; 3473 plogi = &evt->iu.plogi; 3474 memset(plogi, 0, sizeof(*plogi)); 3475 plogi->common.version = cpu_to_be32(1); 3476 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 3477 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 3478 plogi->scsi_id = cpu_to_be64(tgt->scsi_id); 3479 3480 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3481 vhost->discovery_threads--; 3482 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3483 kref_put(&tgt->kref, ibmvfc_release_tgt); 3484 } else 3485 tgt_dbg(tgt, "Sent port login\n"); 3486 } 3487 3488 /** 3489 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3490 * @evt: ibmvfc event struct 3491 * 3492 **/ 3493 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3494 { 3495 struct ibmvfc_target *tgt = evt->tgt; 3496 struct ibmvfc_host *vhost = evt->vhost; 3497 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3498 u32 status = be16_to_cpu(rsp->common.status); 3499 3500 vhost->discovery_threads--; 3501 ibmvfc_free_event(evt); 3502 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3503 3504 switch (status) { 3505 case IBMVFC_MAD_SUCCESS: 3506 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3507 break; 3508 case IBMVFC_MAD_DRIVER_FAILED: 3509 kref_put(&tgt->kref, ibmvfc_release_tgt); 3510 wake_up(&vhost->work_wait_q); 3511 return; 3512 case IBMVFC_MAD_FAILED: 3513 default: 3514 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3515 break; 3516 } 3517 3518 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3519 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3520 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3521 tgt->scsi_id != tgt->new_scsi_id) 3522 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3523 kref_put(&tgt->kref, ibmvfc_release_tgt); 3524 wake_up(&vhost->work_wait_q); 3525 } 3526 3527 /** 3528 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3529 * @tgt: ibmvfc target struct 3530 * 3531 **/ 3532 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3533 { 3534 struct ibmvfc_implicit_logout *mad; 3535 struct ibmvfc_host *vhost = tgt->vhost; 3536 struct ibmvfc_event *evt; 3537 3538 if (vhost->discovery_threads >= disc_threads) 3539 return; 3540 3541 kref_get(&tgt->kref); 3542 evt = ibmvfc_get_event(vhost); 3543 vhost->discovery_threads++; 3544 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3545 evt->tgt = tgt; 3546 mad = &evt->iu.implicit_logout; 3547 memset(mad, 0, sizeof(*mad)); 3548 mad->common.version = cpu_to_be32(1); 3549 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); 3550 mad->common.length = cpu_to_be16(sizeof(*mad)); 3551 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); 3552 3553 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3554 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3555 vhost->discovery_threads--; 3556 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3557 kref_put(&tgt->kref, ibmvfc_release_tgt); 3558 } else 3559 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3560 } 3561 3562 /** 3563 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3564 * @mad: ibmvfc passthru mad struct 3565 * @tgt: ibmvfc target struct 3566 * 3567 * Returns: 3568 * 1 if PLOGI needed / 0 if PLOGI not needed 3569 **/ 3570 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3571 struct ibmvfc_target *tgt) 3572 { 3573 if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name) 3574 return 1; 3575 if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name) 3576 return 1; 3577 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) 3578 return 1; 3579 return 0; 3580 } 3581 3582 /** 3583 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3584 * @evt: ibmvfc event struct 3585 * 3586 **/ 3587 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3588 { 3589 struct ibmvfc_target *tgt = evt->tgt; 3590 struct ibmvfc_host *vhost = evt->vhost; 3591 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3592 u32 status = be16_to_cpu(mad->common.status); 3593 u8 fc_reason, fc_explain; 3594 3595 vhost->discovery_threads--; 3596 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3597 del_timer(&tgt->timer); 3598 3599 switch (status) { 3600 case IBMVFC_MAD_SUCCESS: 3601 tgt_dbg(tgt, "ADISC succeeded\n"); 3602 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3603 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3604 break; 3605 case IBMVFC_MAD_DRIVER_FAILED: 3606 break; 3607 case IBMVFC_MAD_FAILED: 3608 default: 3609 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3610 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; 3611 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; 3612 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3613 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), 3614 be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error), 3615 ibmvfc_get_fc_type(fc_reason), fc_reason, 3616 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3617 break; 3618 } 3619 3620 kref_put(&tgt->kref, ibmvfc_release_tgt); 3621 ibmvfc_free_event(evt); 3622 wake_up(&vhost->work_wait_q); 3623 } 3624 3625 /** 3626 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3627 * @evt: ibmvfc event struct 3628 * 3629 **/ 3630 static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3631 { 3632 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3633 3634 memset(mad, 0, sizeof(*mad)); 3635 mad->common.version = cpu_to_be32(1); 3636 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 3637 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 3638 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3639 offsetof(struct ibmvfc_passthru_mad, iu)); 3640 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 3641 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3642 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3643 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3644 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3645 offsetof(struct ibmvfc_passthru_fc_iu, payload)); 3646 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3647 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3648 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3649 offsetof(struct ibmvfc_passthru_fc_iu, response)); 3650 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3651 } 3652 3653 /** 3654 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3655 * @evt: ibmvfc event struct 3656 * 3657 * Just cleanup this event struct. Everything else is handled by 3658 * the ADISC completion handler. If the ADISC never actually comes 3659 * back, we still have the timer running on the ADISC event struct 3660 * which will fire and cause the CRQ to get reset. 3661 * 3662 **/ 3663 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3664 { 3665 struct ibmvfc_host *vhost = evt->vhost; 3666 struct ibmvfc_target *tgt = evt->tgt; 3667 3668 tgt_dbg(tgt, "ADISC cancel complete\n"); 3669 vhost->abort_threads--; 3670 ibmvfc_free_event(evt); 3671 kref_put(&tgt->kref, ibmvfc_release_tgt); 3672 wake_up(&vhost->work_wait_q); 3673 } 3674 3675 /** 3676 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3677 * @tgt: ibmvfc target struct 3678 * 3679 * If an ADISC times out, send a cancel. If the cancel times 3680 * out, reset the CRQ. When the ADISC comes back as cancelled, 3681 * log back into the target. 3682 **/ 3683 static void ibmvfc_adisc_timeout(struct timer_list *t) 3684 { 3685 struct ibmvfc_target *tgt = from_timer(tgt, t, timer); 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.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3771 add_timer(&tgt->timer); 3772 } 3773 3774 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3775 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3776 vhost->discovery_threads--; 3777 del_timer(&tgt->timer); 3778 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3779 kref_put(&tgt->kref, ibmvfc_release_tgt); 3780 } else 3781 tgt_dbg(tgt, "Sent ADISC\n"); 3782 } 3783 3784 /** 3785 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3786 * @evt: ibmvfc event struct 3787 * 3788 **/ 3789 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3790 { 3791 struct ibmvfc_target *tgt = evt->tgt; 3792 struct ibmvfc_host *vhost = evt->vhost; 3793 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3794 u32 status = be16_to_cpu(rsp->common.status); 3795 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3796 3797 vhost->discovery_threads--; 3798 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3799 switch (status) { 3800 case IBMVFC_MAD_SUCCESS: 3801 tgt_dbg(tgt, "Query Target succeeded\n"); 3802 tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id); 3803 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) 3804 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3805 else 3806 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3807 break; 3808 case IBMVFC_MAD_DRIVER_FAILED: 3809 break; 3810 case IBMVFC_MAD_CRQ_ERROR: 3811 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3812 break; 3813 case IBMVFC_MAD_FAILED: 3814 default: 3815 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3816 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && 3817 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) 3818 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3819 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3820 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3821 else 3822 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3823 3824 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3825 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3826 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), 3827 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), 3828 ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), 3829 status); 3830 break; 3831 } 3832 3833 kref_put(&tgt->kref, ibmvfc_release_tgt); 3834 ibmvfc_free_event(evt); 3835 wake_up(&vhost->work_wait_q); 3836 } 3837 3838 /** 3839 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3840 * @tgt: ibmvfc target struct 3841 * 3842 **/ 3843 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3844 { 3845 struct ibmvfc_query_tgt *query_tgt; 3846 struct ibmvfc_host *vhost = tgt->vhost; 3847 struct ibmvfc_event *evt; 3848 3849 if (vhost->discovery_threads >= disc_threads) 3850 return; 3851 3852 kref_get(&tgt->kref); 3853 evt = ibmvfc_get_event(vhost); 3854 vhost->discovery_threads++; 3855 evt->tgt = tgt; 3856 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3857 query_tgt = &evt->iu.query_tgt; 3858 memset(query_tgt, 0, sizeof(*query_tgt)); 3859 query_tgt->common.version = cpu_to_be32(1); 3860 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); 3861 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); 3862 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); 3863 3864 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3865 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3866 vhost->discovery_threads--; 3867 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3868 kref_put(&tgt->kref, ibmvfc_release_tgt); 3869 } else 3870 tgt_dbg(tgt, "Sent Query Target\n"); 3871 } 3872 3873 /** 3874 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3875 * @vhost: ibmvfc host struct 3876 * @scsi_id: SCSI ID to allocate target for 3877 * 3878 * Returns: 3879 * 0 on success / other on failure 3880 **/ 3881 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3882 { 3883 struct ibmvfc_target *tgt; 3884 unsigned long flags; 3885 3886 spin_lock_irqsave(vhost->host->host_lock, flags); 3887 list_for_each_entry(tgt, &vhost->targets, queue) { 3888 if (tgt->scsi_id == scsi_id) { 3889 if (tgt->need_login) 3890 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3891 goto unlock_out; 3892 } 3893 } 3894 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3895 3896 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3897 memset(tgt, 0, sizeof(*tgt)); 3898 tgt->scsi_id = scsi_id; 3899 tgt->new_scsi_id = scsi_id; 3900 tgt->vhost = vhost; 3901 tgt->need_login = 1; 3902 tgt->cancel_key = vhost->task_set++; 3903 timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0); 3904 kref_init(&tgt->kref); 3905 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3906 spin_lock_irqsave(vhost->host->host_lock, flags); 3907 list_add_tail(&tgt->queue, &vhost->targets); 3908 3909 unlock_out: 3910 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3911 return 0; 3912 } 3913 3914 /** 3915 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3916 * @vhost: ibmvfc host struct 3917 * 3918 * Returns: 3919 * 0 on success / other on failure 3920 **/ 3921 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3922 { 3923 int i, rc; 3924 3925 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3926 rc = ibmvfc_alloc_target(vhost, 3927 be32_to_cpu(vhost->disc_buf->scsi_id[i]) & 3928 IBMVFC_DISC_TGT_SCSI_ID_MASK); 3929 3930 return rc; 3931 } 3932 3933 /** 3934 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3935 * @evt: ibmvfc event struct 3936 * 3937 **/ 3938 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3939 { 3940 struct ibmvfc_host *vhost = evt->vhost; 3941 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3942 u32 mad_status = be16_to_cpu(rsp->common.status); 3943 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3944 3945 switch (mad_status) { 3946 case IBMVFC_MAD_SUCCESS: 3947 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3948 vhost->num_targets = be32_to_cpu(rsp->num_written); 3949 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3950 break; 3951 case IBMVFC_MAD_FAILED: 3952 level += ibmvfc_retry_host_init(vhost); 3953 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 3954 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3955 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); 3956 break; 3957 case IBMVFC_MAD_DRIVER_FAILED: 3958 break; 3959 default: 3960 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3961 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3962 break; 3963 } 3964 3965 ibmvfc_free_event(evt); 3966 wake_up(&vhost->work_wait_q); 3967 } 3968 3969 /** 3970 * ibmvfc_discover_targets - Send Discover Targets MAD 3971 * @vhost: ibmvfc host struct 3972 * 3973 **/ 3974 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3975 { 3976 struct ibmvfc_discover_targets *mad; 3977 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3978 3979 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3980 mad = &evt->iu.discover_targets; 3981 memset(mad, 0, sizeof(*mad)); 3982 mad->common.version = cpu_to_be32(1); 3983 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); 3984 mad->common.length = cpu_to_be16(sizeof(*mad)); 3985 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz); 3986 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma); 3987 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz); 3988 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3989 3990 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3991 ibmvfc_dbg(vhost, "Sent discover targets\n"); 3992 else 3993 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3994 } 3995 3996 /** 3997 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 3998 * @evt: ibmvfc event struct 3999 * 4000 **/ 4001 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 4002 { 4003 struct ibmvfc_host *vhost = evt->vhost; 4004 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); 4005 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 4006 unsigned int npiv_max_sectors; 4007 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4008 4009 switch (mad_status) { 4010 case IBMVFC_MAD_SUCCESS: 4011 ibmvfc_free_event(evt); 4012 break; 4013 case IBMVFC_MAD_FAILED: 4014 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4015 level += ibmvfc_retry_host_init(vhost); 4016 else 4017 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4018 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 4019 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4020 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); 4021 ibmvfc_free_event(evt); 4022 return; 4023 case IBMVFC_MAD_CRQ_ERROR: 4024 ibmvfc_retry_host_init(vhost); 4025 /* fall through */ 4026 case IBMVFC_MAD_DRIVER_FAILED: 4027 ibmvfc_free_event(evt); 4028 return; 4029 default: 4030 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 4031 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4032 ibmvfc_free_event(evt); 4033 return; 4034 } 4035 4036 vhost->client_migrated = 0; 4037 4038 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { 4039 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 4040 rsp->flags); 4041 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4042 wake_up(&vhost->work_wait_q); 4043 return; 4044 } 4045 4046 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { 4047 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 4048 rsp->max_cmds); 4049 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4050 wake_up(&vhost->work_wait_q); 4051 return; 4052 } 4053 4054 vhost->logged_in = 1; 4055 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); 4056 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 4057 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 4058 rsp->drc_name, npiv_max_sectors); 4059 4060 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); 4061 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); 4062 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); 4063 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); 4064 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 4065 fc_host_supported_classes(vhost->host) = 0; 4066 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) 4067 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 4068 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) 4069 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 4070 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) 4071 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 4072 fc_host_maxframe_size(vhost->host) = 4073 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; 4074 4075 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; 4076 vhost->host->max_sectors = npiv_max_sectors; 4077 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4078 wake_up(&vhost->work_wait_q); 4079 } 4080 4081 /** 4082 * ibmvfc_npiv_login - Sends NPIV login 4083 * @vhost: ibmvfc host struct 4084 * 4085 **/ 4086 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 4087 { 4088 struct ibmvfc_npiv_login_mad *mad; 4089 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4090 4091 ibmvfc_gather_partition_info(vhost); 4092 ibmvfc_set_login_info(vhost); 4093 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 4094 4095 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 4096 mad = &evt->iu.npiv_login; 4097 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 4098 mad->common.version = cpu_to_be32(1); 4099 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); 4100 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); 4101 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); 4102 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); 4103 4104 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4105 4106 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4107 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 4108 else 4109 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4110 }; 4111 4112 /** 4113 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 4114 * @vhost: ibmvfc host struct 4115 * 4116 **/ 4117 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 4118 { 4119 struct ibmvfc_host *vhost = evt->vhost; 4120 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); 4121 4122 ibmvfc_free_event(evt); 4123 4124 switch (mad_status) { 4125 case IBMVFC_MAD_SUCCESS: 4126 if (list_empty(&vhost->sent) && 4127 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 4128 ibmvfc_init_host(vhost); 4129 return; 4130 } 4131 break; 4132 case IBMVFC_MAD_FAILED: 4133 case IBMVFC_MAD_NOT_SUPPORTED: 4134 case IBMVFC_MAD_CRQ_ERROR: 4135 case IBMVFC_MAD_DRIVER_FAILED: 4136 default: 4137 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 4138 break; 4139 } 4140 4141 ibmvfc_hard_reset_host(vhost); 4142 } 4143 4144 /** 4145 * ibmvfc_npiv_logout - Issue an NPIV Logout 4146 * @vhost: ibmvfc host struct 4147 * 4148 **/ 4149 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 4150 { 4151 struct ibmvfc_npiv_logout_mad *mad; 4152 struct ibmvfc_event *evt; 4153 4154 evt = ibmvfc_get_event(vhost); 4155 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 4156 4157 mad = &evt->iu.npiv_logout; 4158 memset(mad, 0, sizeof(*mad)); 4159 mad->common.version = cpu_to_be32(1); 4160 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); 4161 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); 4162 4163 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 4164 4165 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4166 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 4167 else 4168 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4169 } 4170 4171 /** 4172 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 4173 * @vhost: ibmvfc host struct 4174 * 4175 * Returns: 4176 * 1 if work to do / 0 if not 4177 **/ 4178 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 4179 { 4180 struct ibmvfc_target *tgt; 4181 4182 list_for_each_entry(tgt, &vhost->targets, queue) { 4183 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 4184 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4185 return 1; 4186 } 4187 4188 return 0; 4189 } 4190 4191 /** 4192 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 4193 * @vhost: ibmvfc host struct 4194 * 4195 * Returns: 4196 * 1 if work to do / 0 if not 4197 **/ 4198 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4199 { 4200 struct ibmvfc_target *tgt; 4201 4202 if (kthread_should_stop()) 4203 return 1; 4204 switch (vhost->action) { 4205 case IBMVFC_HOST_ACTION_NONE: 4206 case IBMVFC_HOST_ACTION_INIT_WAIT: 4207 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4208 return 0; 4209 case IBMVFC_HOST_ACTION_TGT_INIT: 4210 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4211 if (vhost->discovery_threads == disc_threads) 4212 return 0; 4213 list_for_each_entry(tgt, &vhost->targets, queue) 4214 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 4215 return 1; 4216 list_for_each_entry(tgt, &vhost->targets, queue) 4217 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4218 return 0; 4219 return 1; 4220 case IBMVFC_HOST_ACTION_LOGO: 4221 case IBMVFC_HOST_ACTION_INIT: 4222 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4223 case IBMVFC_HOST_ACTION_TGT_DEL: 4224 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4225 case IBMVFC_HOST_ACTION_QUERY: 4226 case IBMVFC_HOST_ACTION_RESET: 4227 case IBMVFC_HOST_ACTION_REENABLE: 4228 default: 4229 break; 4230 } 4231 4232 return 1; 4233 } 4234 4235 /** 4236 * ibmvfc_work_to_do - Is there task level work to do? 4237 * @vhost: ibmvfc host struct 4238 * 4239 * Returns: 4240 * 1 if work to do / 0 if not 4241 **/ 4242 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4243 { 4244 unsigned long flags; 4245 int rc; 4246 4247 spin_lock_irqsave(vhost->host->host_lock, flags); 4248 rc = __ibmvfc_work_to_do(vhost); 4249 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4250 return rc; 4251 } 4252 4253 /** 4254 * ibmvfc_log_ae - Log async events if necessary 4255 * @vhost: ibmvfc host struct 4256 * @events: events to log 4257 * 4258 **/ 4259 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 4260 { 4261 if (events & IBMVFC_AE_RSCN) 4262 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 4263 if ((events & IBMVFC_AE_LINKDOWN) && 4264 vhost->state >= IBMVFC_HALTED) 4265 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 4266 if ((events & IBMVFC_AE_LINKUP) && 4267 vhost->state == IBMVFC_INITIALIZING) 4268 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 4269 } 4270 4271 /** 4272 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 4273 * @tgt: ibmvfc target struct 4274 * 4275 **/ 4276 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 4277 { 4278 struct ibmvfc_host *vhost = tgt->vhost; 4279 struct fc_rport *rport; 4280 unsigned long flags; 4281 4282 tgt_dbg(tgt, "Adding rport\n"); 4283 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 4284 spin_lock_irqsave(vhost->host->host_lock, flags); 4285 4286 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4287 tgt_dbg(tgt, "Deleting rport\n"); 4288 list_del(&tgt->queue); 4289 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4290 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4291 fc_remote_port_delete(rport); 4292 del_timer_sync(&tgt->timer); 4293 kref_put(&tgt->kref, ibmvfc_release_tgt); 4294 return; 4295 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 4296 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4297 return; 4298 } 4299 4300 if (rport) { 4301 tgt_dbg(tgt, "rport add succeeded\n"); 4302 tgt->rport = rport; 4303 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; 4304 rport->supported_classes = 0; 4305 tgt->target_id = rport->scsi_target_id; 4306 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) 4307 rport->supported_classes |= FC_COS_CLASS1; 4308 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) 4309 rport->supported_classes |= FC_COS_CLASS2; 4310 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) 4311 rport->supported_classes |= FC_COS_CLASS3; 4312 if (rport->rqst_q) 4313 blk_queue_max_segments(rport->rqst_q, 1); 4314 } else 4315 tgt_dbg(tgt, "rport add failed\n"); 4316 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4317 } 4318 4319 /** 4320 * ibmvfc_do_work - Do task level work 4321 * @vhost: ibmvfc host struct 4322 * 4323 **/ 4324 static void ibmvfc_do_work(struct ibmvfc_host *vhost) 4325 { 4326 struct ibmvfc_target *tgt; 4327 unsigned long flags; 4328 struct fc_rport *rport; 4329 int rc; 4330 4331 ibmvfc_log_ae(vhost, vhost->events_to_log); 4332 spin_lock_irqsave(vhost->host->host_lock, flags); 4333 vhost->events_to_log = 0; 4334 switch (vhost->action) { 4335 case IBMVFC_HOST_ACTION_NONE: 4336 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4337 case IBMVFC_HOST_ACTION_INIT_WAIT: 4338 break; 4339 case IBMVFC_HOST_ACTION_RESET: 4340 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4341 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4342 rc = ibmvfc_reset_crq(vhost); 4343 spin_lock_irqsave(vhost->host->host_lock, flags); 4344 if (rc == H_CLOSED) 4345 vio_enable_interrupts(to_vio_dev(vhost->dev)); 4346 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 4347 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 4348 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4349 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 4350 } 4351 break; 4352 case IBMVFC_HOST_ACTION_REENABLE: 4353 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4354 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4355 rc = ibmvfc_reenable_crq_queue(vhost); 4356 spin_lock_irqsave(vhost->host->host_lock, flags); 4357 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 4358 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4359 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 4360 } 4361 break; 4362 case IBMVFC_HOST_ACTION_LOGO: 4363 vhost->job_step(vhost); 4364 break; 4365 case IBMVFC_HOST_ACTION_INIT: 4366 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 4367 if (vhost->delay_init) { 4368 vhost->delay_init = 0; 4369 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4370 ssleep(15); 4371 return; 4372 } else 4373 vhost->job_step(vhost); 4374 break; 4375 case IBMVFC_HOST_ACTION_QUERY: 4376 list_for_each_entry(tgt, &vhost->targets, queue) 4377 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 4378 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 4379 break; 4380 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4381 list_for_each_entry(tgt, &vhost->targets, queue) { 4382 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4383 tgt->job_step(tgt); 4384 break; 4385 } 4386 } 4387 4388 if (!ibmvfc_dev_init_to_do(vhost)) 4389 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 4390 break; 4391 case IBMVFC_HOST_ACTION_TGT_DEL: 4392 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4393 list_for_each_entry(tgt, &vhost->targets, queue) { 4394 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4395 tgt_dbg(tgt, "Deleting rport\n"); 4396 rport = tgt->rport; 4397 tgt->rport = NULL; 4398 list_del(&tgt->queue); 4399 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4400 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4401 if (rport) 4402 fc_remote_port_delete(rport); 4403 del_timer_sync(&tgt->timer); 4404 kref_put(&tgt->kref, ibmvfc_release_tgt); 4405 return; 4406 } 4407 } 4408 4409 if (vhost->state == IBMVFC_INITIALIZING) { 4410 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 4411 if (vhost->reinit) { 4412 vhost->reinit = 0; 4413 scsi_block_requests(vhost->host); 4414 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4415 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4416 } else { 4417 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 4418 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4419 wake_up(&vhost->init_wait_q); 4420 schedule_work(&vhost->rport_add_work_q); 4421 vhost->init_retries = 0; 4422 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4423 scsi_unblock_requests(vhost->host); 4424 } 4425 4426 return; 4427 } else { 4428 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 4429 vhost->job_step = ibmvfc_discover_targets; 4430 } 4431 } else { 4432 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4433 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4434 scsi_unblock_requests(vhost->host); 4435 wake_up(&vhost->init_wait_q); 4436 return; 4437 } 4438 break; 4439 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4440 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4441 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4442 ibmvfc_alloc_targets(vhost); 4443 spin_lock_irqsave(vhost->host->host_lock, flags); 4444 break; 4445 case IBMVFC_HOST_ACTION_TGT_INIT: 4446 list_for_each_entry(tgt, &vhost->targets, queue) { 4447 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4448 tgt->job_step(tgt); 4449 break; 4450 } 4451 } 4452 4453 if (!ibmvfc_dev_init_to_do(vhost)) 4454 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4455 break; 4456 default: 4457 break; 4458 } 4459 4460 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4461 } 4462 4463 /** 4464 * ibmvfc_work - Do task level work 4465 * @data: ibmvfc host struct 4466 * 4467 * Returns: 4468 * zero 4469 **/ 4470 static int ibmvfc_work(void *data) 4471 { 4472 struct ibmvfc_host *vhost = data; 4473 int rc; 4474 4475 set_user_nice(current, MIN_NICE); 4476 4477 while (1) { 4478 rc = wait_event_interruptible(vhost->work_wait_q, 4479 ibmvfc_work_to_do(vhost)); 4480 4481 BUG_ON(rc); 4482 4483 if (kthread_should_stop()) 4484 break; 4485 4486 ibmvfc_do_work(vhost); 4487 } 4488 4489 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4490 return 0; 4491 } 4492 4493 /** 4494 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4495 * @vhost: ibmvfc host struct 4496 * 4497 * Allocates a page for messages, maps it for dma, and registers 4498 * the crq with the hypervisor. 4499 * 4500 * Return value: 4501 * zero on success / other on failure 4502 **/ 4503 static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4504 { 4505 int rc, retrc = -ENOMEM; 4506 struct device *dev = vhost->dev; 4507 struct vio_dev *vdev = to_vio_dev(dev); 4508 struct ibmvfc_crq_queue *crq = &vhost->crq; 4509 4510 ENTER; 4511 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4512 4513 if (!crq->msgs) 4514 return -ENOMEM; 4515 4516 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4517 crq->msg_token = dma_map_single(dev, crq->msgs, 4518 PAGE_SIZE, DMA_BIDIRECTIONAL); 4519 4520 if (dma_mapping_error(dev, crq->msg_token)) 4521 goto map_failed; 4522 4523 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4524 crq->msg_token, PAGE_SIZE); 4525 4526 if (rc == H_RESOURCE) 4527 /* maybe kexecing and resource is busy. try a reset */ 4528 retrc = rc = ibmvfc_reset_crq(vhost); 4529 4530 if (rc == H_CLOSED) 4531 dev_warn(dev, "Partner adapter not ready\n"); 4532 else if (rc) { 4533 dev_warn(dev, "Error %d opening adapter\n", rc); 4534 goto reg_crq_failed; 4535 } 4536 4537 retrc = 0; 4538 4539 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4540 4541 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4542 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4543 goto req_irq_failed; 4544 } 4545 4546 if ((rc = vio_enable_interrupts(vdev))) { 4547 dev_err(dev, "Error %d enabling interrupts\n", rc); 4548 goto req_irq_failed; 4549 } 4550 4551 crq->cur = 0; 4552 LEAVE; 4553 return retrc; 4554 4555 req_irq_failed: 4556 tasklet_kill(&vhost->tasklet); 4557 do { 4558 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4559 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4560 reg_crq_failed: 4561 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4562 map_failed: 4563 free_page((unsigned long)crq->msgs); 4564 return retrc; 4565 } 4566 4567 /** 4568 * ibmvfc_free_mem - Free memory for vhost 4569 * @vhost: ibmvfc host struct 4570 * 4571 * Return value: 4572 * none 4573 **/ 4574 static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4575 { 4576 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4577 4578 ENTER; 4579 mempool_destroy(vhost->tgt_pool); 4580 kfree(vhost->trace); 4581 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4582 vhost->disc_buf_dma); 4583 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4584 vhost->login_buf, vhost->login_buf_dma); 4585 dma_pool_destroy(vhost->sg_pool); 4586 dma_unmap_single(vhost->dev, async_q->msg_token, 4587 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4588 free_page((unsigned long)async_q->msgs); 4589 LEAVE; 4590 } 4591 4592 /** 4593 * ibmvfc_alloc_mem - Allocate memory for vhost 4594 * @vhost: ibmvfc host struct 4595 * 4596 * Return value: 4597 * 0 on success / non-zero on failure 4598 **/ 4599 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4600 { 4601 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4602 struct device *dev = vhost->dev; 4603 4604 ENTER; 4605 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4606 if (!async_q->msgs) { 4607 dev_err(dev, "Couldn't allocate async queue.\n"); 4608 goto nomem; 4609 } 4610 4611 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4612 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4613 async_q->size * sizeof(*async_q->msgs), 4614 DMA_BIDIRECTIONAL); 4615 4616 if (dma_mapping_error(dev, async_q->msg_token)) { 4617 dev_err(dev, "Failed to map async queue\n"); 4618 goto free_async_crq; 4619 } 4620 4621 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4622 SG_ALL * sizeof(struct srp_direct_buf), 4623 sizeof(struct srp_direct_buf), 0); 4624 4625 if (!vhost->sg_pool) { 4626 dev_err(dev, "Failed to allocate sg pool\n"); 4627 goto unmap_async_crq; 4628 } 4629 4630 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4631 &vhost->login_buf_dma, GFP_KERNEL); 4632 4633 if (!vhost->login_buf) { 4634 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4635 goto free_sg_pool; 4636 } 4637 4638 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4639 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4640 &vhost->disc_buf_dma, GFP_KERNEL); 4641 4642 if (!vhost->disc_buf) { 4643 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4644 goto free_login_buffer; 4645 } 4646 4647 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4648 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4649 4650 if (!vhost->trace) 4651 goto free_disc_buffer; 4652 4653 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4654 sizeof(struct ibmvfc_target)); 4655 4656 if (!vhost->tgt_pool) { 4657 dev_err(dev, "Couldn't allocate target memory pool\n"); 4658 goto free_trace; 4659 } 4660 4661 LEAVE; 4662 return 0; 4663 4664 free_trace: 4665 kfree(vhost->trace); 4666 free_disc_buffer: 4667 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4668 vhost->disc_buf_dma); 4669 free_login_buffer: 4670 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4671 vhost->login_buf, vhost->login_buf_dma); 4672 free_sg_pool: 4673 dma_pool_destroy(vhost->sg_pool); 4674 unmap_async_crq: 4675 dma_unmap_single(dev, async_q->msg_token, 4676 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4677 free_async_crq: 4678 free_page((unsigned long)async_q->msgs); 4679 nomem: 4680 LEAVE; 4681 return -ENOMEM; 4682 } 4683 4684 /** 4685 * ibmvfc_rport_add_thread - Worker thread for rport adds 4686 * @work: work struct 4687 * 4688 **/ 4689 static void ibmvfc_rport_add_thread(struct work_struct *work) 4690 { 4691 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4692 rport_add_work_q); 4693 struct ibmvfc_target *tgt; 4694 struct fc_rport *rport; 4695 unsigned long flags; 4696 int did_work; 4697 4698 ENTER; 4699 spin_lock_irqsave(vhost->host->host_lock, flags); 4700 do { 4701 did_work = 0; 4702 if (vhost->state != IBMVFC_ACTIVE) 4703 break; 4704 4705 list_for_each_entry(tgt, &vhost->targets, queue) { 4706 if (tgt->add_rport) { 4707 did_work = 1; 4708 tgt->add_rport = 0; 4709 kref_get(&tgt->kref); 4710 rport = tgt->rport; 4711 if (!rport) { 4712 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4713 ibmvfc_tgt_add_rport(tgt); 4714 } else if (get_device(&rport->dev)) { 4715 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4716 tgt_dbg(tgt, "Setting rport roles\n"); 4717 fc_remote_port_rolechg(rport, tgt->ids.roles); 4718 put_device(&rport->dev); 4719 } else { 4720 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4721 } 4722 4723 kref_put(&tgt->kref, ibmvfc_release_tgt); 4724 spin_lock_irqsave(vhost->host->host_lock, flags); 4725 break; 4726 } 4727 } 4728 } while(did_work); 4729 4730 if (vhost->state == IBMVFC_ACTIVE) 4731 vhost->scan_complete = 1; 4732 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4733 LEAVE; 4734 } 4735 4736 /** 4737 * ibmvfc_probe - Adapter hot plug add entry point 4738 * @vdev: vio device struct 4739 * @id: vio device id struct 4740 * 4741 * Return value: 4742 * 0 on success / non-zero on failure 4743 **/ 4744 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4745 { 4746 struct ibmvfc_host *vhost; 4747 struct Scsi_Host *shost; 4748 struct device *dev = &vdev->dev; 4749 int rc = -ENOMEM; 4750 4751 ENTER; 4752 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4753 if (!shost) { 4754 dev_err(dev, "Couldn't allocate host data\n"); 4755 goto out; 4756 } 4757 4758 shost->transportt = ibmvfc_transport_template; 4759 shost->can_queue = max_requests; 4760 shost->max_lun = max_lun; 4761 shost->max_id = max_targets; 4762 shost->max_sectors = IBMVFC_MAX_SECTORS; 4763 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4764 shost->unique_id = shost->host_no; 4765 4766 vhost = shost_priv(shost); 4767 INIT_LIST_HEAD(&vhost->sent); 4768 INIT_LIST_HEAD(&vhost->free); 4769 INIT_LIST_HEAD(&vhost->targets); 4770 sprintf(vhost->name, IBMVFC_NAME); 4771 vhost->host = shost; 4772 vhost->dev = dev; 4773 vhost->partition_number = -1; 4774 vhost->log_level = log_level; 4775 vhost->task_set = 1; 4776 strcpy(vhost->partition_name, "UNKNOWN"); 4777 init_waitqueue_head(&vhost->work_wait_q); 4778 init_waitqueue_head(&vhost->init_wait_q); 4779 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4780 mutex_init(&vhost->passthru_mutex); 4781 4782 if ((rc = ibmvfc_alloc_mem(vhost))) 4783 goto free_scsi_host; 4784 4785 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4786 shost->host_no); 4787 4788 if (IS_ERR(vhost->work_thread)) { 4789 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4790 PTR_ERR(vhost->work_thread)); 4791 goto free_host_mem; 4792 } 4793 4794 if ((rc = ibmvfc_init_crq(vhost))) { 4795 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4796 goto kill_kthread; 4797 } 4798 4799 if ((rc = ibmvfc_init_event_pool(vhost))) { 4800 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4801 goto release_crq; 4802 } 4803 4804 if ((rc = scsi_add_host(shost, dev))) 4805 goto release_event_pool; 4806 4807 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 4808 4809 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4810 &ibmvfc_trace_attr))) { 4811 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4812 goto remove_shost; 4813 } 4814 4815 if (shost_to_fc_host(shost)->rqst_q) 4816 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 4817 dev_set_drvdata(dev, vhost); 4818 spin_lock(&ibmvfc_driver_lock); 4819 list_add_tail(&vhost->queue, &ibmvfc_head); 4820 spin_unlock(&ibmvfc_driver_lock); 4821 4822 ibmvfc_send_crq_init(vhost); 4823 scsi_scan_host(shost); 4824 return 0; 4825 4826 remove_shost: 4827 scsi_remove_host(shost); 4828 release_event_pool: 4829 ibmvfc_free_event_pool(vhost); 4830 release_crq: 4831 ibmvfc_release_crq_queue(vhost); 4832 kill_kthread: 4833 kthread_stop(vhost->work_thread); 4834 free_host_mem: 4835 ibmvfc_free_mem(vhost); 4836 free_scsi_host: 4837 scsi_host_put(shost); 4838 out: 4839 LEAVE; 4840 return rc; 4841 } 4842 4843 /** 4844 * ibmvfc_remove - Adapter hot plug remove entry point 4845 * @vdev: vio device struct 4846 * 4847 * Return value: 4848 * 0 4849 **/ 4850 static int ibmvfc_remove(struct vio_dev *vdev) 4851 { 4852 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4853 unsigned long flags; 4854 4855 ENTER; 4856 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4857 4858 spin_lock_irqsave(vhost->host->host_lock, flags); 4859 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4860 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4861 4862 ibmvfc_wait_while_resetting(vhost); 4863 ibmvfc_release_crq_queue(vhost); 4864 kthread_stop(vhost->work_thread); 4865 fc_remove_host(vhost->host); 4866 scsi_remove_host(vhost->host); 4867 4868 spin_lock_irqsave(vhost->host->host_lock, flags); 4869 ibmvfc_purge_requests(vhost, DID_ERROR); 4870 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4871 ibmvfc_free_event_pool(vhost); 4872 4873 ibmvfc_free_mem(vhost); 4874 spin_lock(&ibmvfc_driver_lock); 4875 list_del(&vhost->queue); 4876 spin_unlock(&ibmvfc_driver_lock); 4877 scsi_host_put(vhost->host); 4878 LEAVE; 4879 return 0; 4880 } 4881 4882 /** 4883 * ibmvfc_resume - Resume from suspend 4884 * @dev: device struct 4885 * 4886 * We may have lost an interrupt across suspend/resume, so kick the 4887 * interrupt handler 4888 * 4889 */ 4890 static int ibmvfc_resume(struct device *dev) 4891 { 4892 unsigned long flags; 4893 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 4894 struct vio_dev *vdev = to_vio_dev(dev); 4895 4896 spin_lock_irqsave(vhost->host->host_lock, flags); 4897 vio_disable_interrupts(vdev); 4898 tasklet_schedule(&vhost->tasklet); 4899 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4900 return 0; 4901 } 4902 4903 /** 4904 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4905 * @vdev: vio device struct 4906 * 4907 * Return value: 4908 * Number of bytes the driver will need to DMA map at the same time in 4909 * order to perform well. 4910 */ 4911 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4912 { 4913 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4914 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4915 } 4916 4917 static const struct vio_device_id ibmvfc_device_table[] = { 4918 {"fcp", "IBM,vfc-client"}, 4919 { "", "" } 4920 }; 4921 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4922 4923 static const struct dev_pm_ops ibmvfc_pm_ops = { 4924 .resume = ibmvfc_resume 4925 }; 4926 4927 static struct vio_driver ibmvfc_driver = { 4928 .id_table = ibmvfc_device_table, 4929 .probe = ibmvfc_probe, 4930 .remove = ibmvfc_remove, 4931 .get_desired_dma = ibmvfc_get_desired_dma, 4932 .name = IBMVFC_NAME, 4933 .pm = &ibmvfc_pm_ops, 4934 }; 4935 4936 static struct fc_function_template ibmvfc_transport_functions = { 4937 .show_host_fabric_name = 1, 4938 .show_host_node_name = 1, 4939 .show_host_port_name = 1, 4940 .show_host_supported_classes = 1, 4941 .show_host_port_type = 1, 4942 .show_host_port_id = 1, 4943 .show_host_maxframe_size = 1, 4944 4945 .get_host_port_state = ibmvfc_get_host_port_state, 4946 .show_host_port_state = 1, 4947 4948 .get_host_speed = ibmvfc_get_host_speed, 4949 .show_host_speed = 1, 4950 4951 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4952 .terminate_rport_io = ibmvfc_terminate_rport_io, 4953 4954 .show_rport_maxframe_size = 1, 4955 .show_rport_supported_classes = 1, 4956 4957 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4958 .show_rport_dev_loss_tmo = 1, 4959 4960 .get_starget_node_name = ibmvfc_get_starget_node_name, 4961 .show_starget_node_name = 1, 4962 4963 .get_starget_port_name = ibmvfc_get_starget_port_name, 4964 .show_starget_port_name = 1, 4965 4966 .get_starget_port_id = ibmvfc_get_starget_port_id, 4967 .show_starget_port_id = 1, 4968 4969 .bsg_request = ibmvfc_bsg_request, 4970 .bsg_timeout = ibmvfc_bsg_timeout, 4971 }; 4972 4973 /** 4974 * ibmvfc_module_init - Initialize the ibmvfc module 4975 * 4976 * Return value: 4977 * 0 on success / other on failure 4978 **/ 4979 static int __init ibmvfc_module_init(void) 4980 { 4981 int rc; 4982 4983 if (!firmware_has_feature(FW_FEATURE_VIO)) 4984 return -ENODEV; 4985 4986 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4987 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4988 4989 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4990 if (!ibmvfc_transport_template) 4991 return -ENOMEM; 4992 4993 rc = vio_register_driver(&ibmvfc_driver); 4994 if (rc) 4995 fc_release_transport(ibmvfc_transport_template); 4996 return rc; 4997 } 4998 4999 /** 5000 * ibmvfc_module_exit - Teardown the ibmvfc module 5001 * 5002 * Return value: 5003 * nothing 5004 **/ 5005 static void __exit ibmvfc_module_exit(void) 5006 { 5007 vio_unregister_driver(&ibmvfc_driver); 5008 fc_release_transport(ibmvfc_transport_template); 5009 } 5010 5011 module_init(ibmvfc_module_init); 5012 module_exit(ibmvfc_module_exit); 5013