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 case FC_BSG_RPT_ELS: 1834 fc_flags = IBMVFC_FC_ELS; 1835 break; 1836 case FC_BSG_HST_CT: 1837 issue_login = 1; 1838 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) | 1839 (bsg_request->rqst_data.h_ct.port_id[1] << 8) | 1840 bsg_request->rqst_data.h_ct.port_id[2]; 1841 case FC_BSG_RPT_CT: 1842 fc_flags = IBMVFC_FC_CT_IU; 1843 break; 1844 default: 1845 return -ENOTSUPP; 1846 } 1847 1848 if (port_id == -1) 1849 return -EINVAL; 1850 if (!mutex_trylock(&vhost->passthru_mutex)) 1851 return -EBUSY; 1852 1853 job->dd_data = (void *)port_id; 1854 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 1855 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1856 1857 if (!req_seg) { 1858 mutex_unlock(&vhost->passthru_mutex); 1859 return -ENOMEM; 1860 } 1861 1862 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 1863 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1864 1865 if (!rsp_seg) { 1866 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1867 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1868 mutex_unlock(&vhost->passthru_mutex); 1869 return -ENOMEM; 1870 } 1871 1872 if (req_seg > 1 || rsp_seg > 1) { 1873 rc = -EINVAL; 1874 goto out; 1875 } 1876 1877 if (issue_login) 1878 rc = ibmvfc_bsg_plogi(vhost, port_id); 1879 1880 spin_lock_irqsave(vhost->host->host_lock, flags); 1881 1882 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 1883 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1884 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1885 goto out; 1886 } 1887 1888 evt = ibmvfc_get_event(vhost); 1889 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1890 mad = &evt->iu.passthru; 1891 1892 memset(mad, 0, sizeof(*mad)); 1893 mad->common.version = cpu_to_be32(1); 1894 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 1895 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 1896 1897 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + 1898 offsetof(struct ibmvfc_passthru_mad, iu)); 1899 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 1900 1901 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); 1902 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); 1903 mad->iu.flags = cpu_to_be32(fc_flags); 1904 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 1905 1906 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); 1907 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); 1908 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); 1909 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); 1910 mad->iu.scsi_id = cpu_to_be64(port_id); 1911 mad->iu.tag = cpu_to_be64((u64)evt); 1912 rsp_len = be32_to_cpu(mad->iu.rsp.len); 1913 1914 evt->sync_iu = &rsp_iu; 1915 init_completion(&evt->comp); 1916 rc = ibmvfc_send_event(evt, vhost, 0); 1917 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1918 1919 if (rc) { 1920 rc = -EIO; 1921 goto out; 1922 } 1923 1924 wait_for_completion(&evt->comp); 1925 1926 if (rsp_iu.passthru.common.status) 1927 rc = -EIO; 1928 else 1929 bsg_reply->reply_payload_rcv_len = rsp_len; 1930 1931 spin_lock_irqsave(vhost->host->host_lock, flags); 1932 ibmvfc_free_event(evt); 1933 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1934 bsg_reply->result = rc; 1935 bsg_job_done(job, bsg_reply->result, 1936 bsg_reply->reply_payload_rcv_len); 1937 rc = 0; 1938 out: 1939 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1940 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1941 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 1942 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1943 mutex_unlock(&vhost->passthru_mutex); 1944 LEAVE; 1945 return rc; 1946 } 1947 1948 /** 1949 * ibmvfc_reset_device - Reset the device with the specified reset type 1950 * @sdev: scsi device to reset 1951 * @type: reset type 1952 * @desc: reset type description for log messages 1953 * 1954 * Returns: 1955 * 0 on success / other on failure 1956 **/ 1957 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1958 { 1959 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1960 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1961 struct ibmvfc_cmd *tmf; 1962 struct ibmvfc_event *evt = NULL; 1963 union ibmvfc_iu rsp_iu; 1964 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1965 int rsp_rc = -EBUSY; 1966 unsigned long flags; 1967 int rsp_code = 0; 1968 1969 spin_lock_irqsave(vhost->host->host_lock, flags); 1970 if (vhost->state == IBMVFC_ACTIVE) { 1971 evt = ibmvfc_get_event(vhost); 1972 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1973 1974 tmf = &evt->iu.cmd; 1975 memset(tmf, 0, sizeof(*tmf)); 1976 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 1977 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); 1978 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1979 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); 1980 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); 1981 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 1982 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); 1983 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1984 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 1985 tmf->iu.tmf_flags = type; 1986 evt->sync_iu = &rsp_iu; 1987 1988 init_completion(&evt->comp); 1989 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1990 } 1991 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1992 1993 if (rsp_rc != 0) { 1994 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 1995 desc, rsp_rc); 1996 return -EIO; 1997 } 1998 1999 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2000 wait_for_completion(&evt->comp); 2001 2002 if (rsp_iu.cmd.status) 2003 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2004 2005 if (rsp_code) { 2006 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2007 rsp_code = fc_rsp->data.info.rsp_code; 2008 2009 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2010 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, 2011 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2012 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, 2013 fc_rsp->scsi_status); 2014 rsp_rc = -EIO; 2015 } else 2016 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2017 2018 spin_lock_irqsave(vhost->host->host_lock, flags); 2019 ibmvfc_free_event(evt); 2020 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2021 return rsp_rc; 2022 } 2023 2024 /** 2025 * ibmvfc_match_rport - Match function for specified remote port 2026 * @evt: ibmvfc event struct 2027 * @device: device to match (rport) 2028 * 2029 * Returns: 2030 * 1 if event matches rport / 0 if event does not match rport 2031 **/ 2032 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2033 { 2034 struct fc_rport *cmd_rport; 2035 2036 if (evt->cmnd) { 2037 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2038 if (cmd_rport == rport) 2039 return 1; 2040 } 2041 return 0; 2042 } 2043 2044 /** 2045 * ibmvfc_match_target - Match function for specified target 2046 * @evt: ibmvfc event struct 2047 * @device: device to match (starget) 2048 * 2049 * Returns: 2050 * 1 if event matches starget / 0 if event does not match starget 2051 **/ 2052 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2053 { 2054 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2055 return 1; 2056 return 0; 2057 } 2058 2059 /** 2060 * ibmvfc_match_lun - Match function for specified LUN 2061 * @evt: ibmvfc event struct 2062 * @device: device to match (sdev) 2063 * 2064 * Returns: 2065 * 1 if event matches sdev / 0 if event does not match sdev 2066 **/ 2067 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2068 { 2069 if (evt->cmnd && evt->cmnd->device == device) 2070 return 1; 2071 return 0; 2072 } 2073 2074 /** 2075 * ibmvfc_wait_for_ops - Wait for ops to complete 2076 * @vhost: ibmvfc host struct 2077 * @device: device to match (starget or sdev) 2078 * @match: match function 2079 * 2080 * Returns: 2081 * SUCCESS / FAILED 2082 **/ 2083 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2084 int (*match) (struct ibmvfc_event *, void *)) 2085 { 2086 struct ibmvfc_event *evt; 2087 DECLARE_COMPLETION_ONSTACK(comp); 2088 int wait; 2089 unsigned long flags; 2090 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2091 2092 ENTER; 2093 do { 2094 wait = 0; 2095 spin_lock_irqsave(vhost->host->host_lock, flags); 2096 list_for_each_entry(evt, &vhost->sent, queue) { 2097 if (match(evt, device)) { 2098 evt->eh_comp = ∁ 2099 wait++; 2100 } 2101 } 2102 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2103 2104 if (wait) { 2105 timeout = wait_for_completion_timeout(&comp, timeout); 2106 2107 if (!timeout) { 2108 wait = 0; 2109 spin_lock_irqsave(vhost->host->host_lock, flags); 2110 list_for_each_entry(evt, &vhost->sent, queue) { 2111 if (match(evt, device)) { 2112 evt->eh_comp = NULL; 2113 wait++; 2114 } 2115 } 2116 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2117 if (wait) 2118 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2119 LEAVE; 2120 return wait ? FAILED : SUCCESS; 2121 } 2122 } 2123 } while (wait); 2124 2125 LEAVE; 2126 return SUCCESS; 2127 } 2128 2129 /** 2130 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2131 * @sdev: scsi device to cancel commands 2132 * @type: type of error recovery being performed 2133 * 2134 * This sends a cancel to the VIOS for the specified device. This does 2135 * NOT send any abort to the actual device. That must be done separately. 2136 * 2137 * Returns: 2138 * 0 on success / other on failure 2139 **/ 2140 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2141 { 2142 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2143 struct scsi_target *starget = scsi_target(sdev); 2144 struct fc_rport *rport = starget_to_rport(starget); 2145 struct ibmvfc_tmf *tmf; 2146 struct ibmvfc_event *evt, *found_evt; 2147 union ibmvfc_iu rsp; 2148 int rsp_rc = -EBUSY; 2149 unsigned long flags; 2150 u16 status; 2151 2152 ENTER; 2153 spin_lock_irqsave(vhost->host->host_lock, flags); 2154 found_evt = NULL; 2155 list_for_each_entry(evt, &vhost->sent, queue) { 2156 if (evt->cmnd && evt->cmnd->device == sdev) { 2157 found_evt = evt; 2158 break; 2159 } 2160 } 2161 2162 if (!found_evt) { 2163 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2164 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2165 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2166 return 0; 2167 } 2168 2169 if (vhost->logged_in) { 2170 evt = ibmvfc_get_event(vhost); 2171 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2172 2173 tmf = &evt->iu.tmf; 2174 memset(tmf, 0, sizeof(*tmf)); 2175 tmf->common.version = cpu_to_be32(1); 2176 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2177 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2178 tmf->scsi_id = cpu_to_be64(rport->port_id); 2179 int_to_scsilun(sdev->lun, &tmf->lun); 2180 if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS)) 2181 type &= ~IBMVFC_TMF_SUPPRESS_ABTS; 2182 if (vhost->state == IBMVFC_ACTIVE) 2183 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); 2184 else 2185 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); 2186 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2187 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); 2188 2189 evt->sync_iu = &rsp; 2190 init_completion(&evt->comp); 2191 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2192 } 2193 2194 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2195 2196 if (rsp_rc != 0) { 2197 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2198 /* If failure is received, the host adapter is most likely going 2199 through reset, return success so the caller will wait for the command 2200 being cancelled to get returned */ 2201 return 0; 2202 } 2203 2204 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2205 2206 wait_for_completion(&evt->comp); 2207 status = be16_to_cpu(rsp.mad_common.status); 2208 spin_lock_irqsave(vhost->host->host_lock, flags); 2209 ibmvfc_free_event(evt); 2210 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2211 2212 if (status != IBMVFC_MAD_SUCCESS) { 2213 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2214 switch (status) { 2215 case IBMVFC_MAD_DRIVER_FAILED: 2216 case IBMVFC_MAD_CRQ_ERROR: 2217 /* Host adapter most likely going through reset, return success to 2218 the caller will wait for the command being cancelled to get returned */ 2219 return 0; 2220 default: 2221 return -EIO; 2222 }; 2223 } 2224 2225 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2226 return 0; 2227 } 2228 2229 /** 2230 * ibmvfc_match_key - Match function for specified cancel key 2231 * @evt: ibmvfc event struct 2232 * @key: cancel key to match 2233 * 2234 * Returns: 2235 * 1 if event matches key / 0 if event does not match key 2236 **/ 2237 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2238 { 2239 unsigned long cancel_key = (unsigned long)key; 2240 2241 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2242 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) 2243 return 1; 2244 return 0; 2245 } 2246 2247 /** 2248 * ibmvfc_match_evt - Match function for specified event 2249 * @evt: ibmvfc event struct 2250 * @match: event to match 2251 * 2252 * Returns: 2253 * 1 if event matches key / 0 if event does not match key 2254 **/ 2255 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) 2256 { 2257 if (evt == match) 2258 return 1; 2259 return 0; 2260 } 2261 2262 /** 2263 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2264 * @sdev: scsi device to abort commands 2265 * 2266 * This sends an Abort Task Set to the VIOS for the specified device. This does 2267 * NOT send any cancel to the VIOS. That must be done separately. 2268 * 2269 * Returns: 2270 * 0 on success / other on failure 2271 **/ 2272 static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2273 { 2274 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2275 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2276 struct ibmvfc_cmd *tmf; 2277 struct ibmvfc_event *evt, *found_evt; 2278 union ibmvfc_iu rsp_iu; 2279 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 2280 int rc, rsp_rc = -EBUSY; 2281 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2282 int rsp_code = 0; 2283 2284 spin_lock_irqsave(vhost->host->host_lock, flags); 2285 found_evt = NULL; 2286 list_for_each_entry(evt, &vhost->sent, queue) { 2287 if (evt->cmnd && evt->cmnd->device == sdev) { 2288 found_evt = evt; 2289 break; 2290 } 2291 } 2292 2293 if (!found_evt) { 2294 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2295 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2296 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2297 return 0; 2298 } 2299 2300 if (vhost->state == IBMVFC_ACTIVE) { 2301 evt = ibmvfc_get_event(vhost); 2302 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2303 2304 tmf = &evt->iu.cmd; 2305 memset(tmf, 0, sizeof(*tmf)); 2306 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 2307 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); 2308 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 2309 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); 2310 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); 2311 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2312 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); 2313 int_to_scsilun(sdev->lun, &tmf->iu.lun); 2314 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2315 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 2316 evt->sync_iu = &rsp_iu; 2317 2318 init_completion(&evt->comp); 2319 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2320 } 2321 2322 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2323 2324 if (rsp_rc != 0) { 2325 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2326 return -EIO; 2327 } 2328 2329 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2330 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2331 2332 if (!timeout) { 2333 rc = ibmvfc_cancel_all(sdev, 0); 2334 if (!rc) { 2335 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2336 if (rc == SUCCESS) 2337 rc = 0; 2338 } 2339 2340 if (rc) { 2341 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2342 ibmvfc_reset_host(vhost); 2343 rsp_rc = -EIO; 2344 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2345 2346 if (rc == SUCCESS) 2347 rsp_rc = 0; 2348 2349 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); 2350 if (rc != SUCCESS) { 2351 spin_lock_irqsave(vhost->host->host_lock, flags); 2352 ibmvfc_hard_reset_host(vhost); 2353 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2354 rsp_rc = 0; 2355 } 2356 2357 goto out; 2358 } 2359 } 2360 2361 if (rsp_iu.cmd.status) 2362 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2363 2364 if (rsp_code) { 2365 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2366 rsp_code = fc_rsp->data.info.rsp_code; 2367 2368 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2369 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2370 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2371 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, 2372 fc_rsp->scsi_status); 2373 rsp_rc = -EIO; 2374 } else 2375 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2376 2377 out: 2378 spin_lock_irqsave(vhost->host->host_lock, flags); 2379 ibmvfc_free_event(evt); 2380 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2381 return rsp_rc; 2382 } 2383 2384 /** 2385 * ibmvfc_eh_abort_handler - Abort a command 2386 * @cmd: scsi command to abort 2387 * 2388 * Returns: 2389 * SUCCESS / FAST_IO_FAIL / FAILED 2390 **/ 2391 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2392 { 2393 struct scsi_device *sdev = cmd->device; 2394 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2395 int cancel_rc, block_rc; 2396 int rc = FAILED; 2397 2398 ENTER; 2399 block_rc = fc_block_scsi_eh(cmd); 2400 ibmvfc_wait_while_resetting(vhost); 2401 if (block_rc != FAST_IO_FAIL) { 2402 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2403 ibmvfc_abort_task_set(sdev); 2404 } else 2405 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2406 2407 if (!cancel_rc) 2408 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2409 2410 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2411 rc = FAST_IO_FAIL; 2412 2413 LEAVE; 2414 return rc; 2415 } 2416 2417 /** 2418 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2419 * @cmd: scsi command struct 2420 * 2421 * Returns: 2422 * SUCCESS / FAST_IO_FAIL / FAILED 2423 **/ 2424 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2425 { 2426 struct scsi_device *sdev = cmd->device; 2427 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2428 int cancel_rc, block_rc, reset_rc = 0; 2429 int rc = FAILED; 2430 2431 ENTER; 2432 block_rc = fc_block_scsi_eh(cmd); 2433 ibmvfc_wait_while_resetting(vhost); 2434 if (block_rc != FAST_IO_FAIL) { 2435 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2436 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2437 } else 2438 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2439 2440 if (!cancel_rc && !reset_rc) 2441 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2442 2443 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2444 rc = FAST_IO_FAIL; 2445 2446 LEAVE; 2447 return rc; 2448 } 2449 2450 /** 2451 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function 2452 * @sdev: scsi device struct 2453 * @data: return code 2454 * 2455 **/ 2456 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) 2457 { 2458 unsigned long *rc = data; 2459 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2460 } 2461 2462 /** 2463 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2464 * @sdev: scsi device struct 2465 * @data: return code 2466 * 2467 **/ 2468 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2469 { 2470 unsigned long *rc = data; 2471 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2472 } 2473 2474 /** 2475 * ibmvfc_eh_target_reset_handler - Reset the target 2476 * @cmd: scsi command struct 2477 * 2478 * Returns: 2479 * SUCCESS / FAST_IO_FAIL / FAILED 2480 **/ 2481 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2482 { 2483 struct scsi_device *sdev = cmd->device; 2484 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2485 struct scsi_target *starget = scsi_target(sdev); 2486 int block_rc; 2487 int reset_rc = 0; 2488 int rc = FAILED; 2489 unsigned long cancel_rc = 0; 2490 2491 ENTER; 2492 block_rc = fc_block_scsi_eh(cmd); 2493 ibmvfc_wait_while_resetting(vhost); 2494 if (block_rc != FAST_IO_FAIL) { 2495 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2496 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2497 } else 2498 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); 2499 2500 if (!cancel_rc && !reset_rc) 2501 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2502 2503 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2504 rc = FAST_IO_FAIL; 2505 2506 LEAVE; 2507 return rc; 2508 } 2509 2510 /** 2511 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2512 * @cmd: struct scsi_cmnd having problems 2513 * 2514 **/ 2515 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2516 { 2517 int rc; 2518 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2519 2520 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2521 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2522 2523 return rc ? FAILED : SUCCESS; 2524 } 2525 2526 /** 2527 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2528 * @rport: rport struct 2529 * 2530 * Return value: 2531 * none 2532 **/ 2533 static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2534 { 2535 struct Scsi_Host *shost = rport_to_shost(rport); 2536 struct ibmvfc_host *vhost = shost_priv(shost); 2537 struct fc_rport *dev_rport; 2538 struct scsi_device *sdev; 2539 unsigned long rc; 2540 2541 ENTER; 2542 shost_for_each_device(sdev, shost) { 2543 dev_rport = starget_to_rport(scsi_target(sdev)); 2544 if (dev_rport != rport) 2545 continue; 2546 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2547 } 2548 2549 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 2550 2551 if (rc == FAILED) 2552 ibmvfc_issue_fc_host_lip(shost); 2553 LEAVE; 2554 } 2555 2556 static const struct ibmvfc_async_desc ae_desc [] = { 2557 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2558 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2559 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2560 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2561 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2562 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, 2563 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, 2564 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, 2565 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, 2566 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, 2567 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, 2568 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, 2569 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, 2570 }; 2571 2572 static const struct ibmvfc_async_desc unknown_ae = { 2573 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL 2574 }; 2575 2576 /** 2577 * ibmvfc_get_ae_desc - Get text description for async event 2578 * @ae: async event 2579 * 2580 **/ 2581 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 2582 { 2583 int i; 2584 2585 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2586 if (ae_desc[i].ae == ae) 2587 return &ae_desc[i]; 2588 2589 return &unknown_ae; 2590 } 2591 2592 static const struct { 2593 enum ibmvfc_ae_link_state state; 2594 const char *desc; 2595 } link_desc [] = { 2596 { IBMVFC_AE_LS_LINK_UP, " link up" }, 2597 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 2598 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 2599 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 2600 }; 2601 2602 /** 2603 * ibmvfc_get_link_state - Get text description for link state 2604 * @state: link state 2605 * 2606 **/ 2607 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 2608 { 2609 int i; 2610 2611 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 2612 if (link_desc[i].state == state) 2613 return link_desc[i].desc; 2614 2615 return ""; 2616 } 2617 2618 /** 2619 * ibmvfc_handle_async - Handle an async event from the adapter 2620 * @crq: crq to process 2621 * @vhost: ibmvfc host struct 2622 * 2623 **/ 2624 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2625 struct ibmvfc_host *vhost) 2626 { 2627 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); 2628 struct ibmvfc_target *tgt; 2629 2630 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 2631 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id), 2632 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name), 2633 ibmvfc_get_link_state(crq->link_state)); 2634 2635 switch (be64_to_cpu(crq->event)) { 2636 case IBMVFC_AE_RESUME: 2637 switch (crq->link_state) { 2638 case IBMVFC_AE_LS_LINK_DOWN: 2639 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2640 break; 2641 case IBMVFC_AE_LS_LINK_DEAD: 2642 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2643 break; 2644 case IBMVFC_AE_LS_LINK_UP: 2645 case IBMVFC_AE_LS_LINK_BOUNCED: 2646 default: 2647 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2648 vhost->delay_init = 1; 2649 __ibmvfc_reset_host(vhost); 2650 break; 2651 } 2652 2653 break; 2654 case IBMVFC_AE_LINK_UP: 2655 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2656 vhost->delay_init = 1; 2657 __ibmvfc_reset_host(vhost); 2658 break; 2659 case IBMVFC_AE_SCN_FABRIC: 2660 case IBMVFC_AE_SCN_DOMAIN: 2661 vhost->events_to_log |= IBMVFC_AE_RSCN; 2662 if (vhost->state < IBMVFC_HALTED) { 2663 vhost->delay_init = 1; 2664 __ibmvfc_reset_host(vhost); 2665 } 2666 break; 2667 case IBMVFC_AE_SCN_NPORT: 2668 case IBMVFC_AE_SCN_GROUP: 2669 vhost->events_to_log |= IBMVFC_AE_RSCN; 2670 ibmvfc_reinit_host(vhost); 2671 break; 2672 case IBMVFC_AE_ELS_LOGO: 2673 case IBMVFC_AE_ELS_PRLO: 2674 case IBMVFC_AE_ELS_PLOGI: 2675 list_for_each_entry(tgt, &vhost->targets, queue) { 2676 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 2677 break; 2678 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) 2679 continue; 2680 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) 2681 continue; 2682 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) 2683 continue; 2684 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) 2685 tgt->logo_rcvd = 1; 2686 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { 2687 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2688 ibmvfc_reinit_host(vhost); 2689 } 2690 } 2691 break; 2692 case IBMVFC_AE_LINK_DOWN: 2693 case IBMVFC_AE_ADAPTER_FAILED: 2694 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2695 break; 2696 case IBMVFC_AE_LINK_DEAD: 2697 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2698 break; 2699 case IBMVFC_AE_HALT: 2700 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2701 break; 2702 default: 2703 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2704 break; 2705 } 2706 } 2707 2708 /** 2709 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2710 * @crq: Command/Response queue 2711 * @vhost: ibmvfc host struct 2712 * 2713 **/ 2714 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2715 { 2716 long rc; 2717 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 2718 2719 switch (crq->valid) { 2720 case IBMVFC_CRQ_INIT_RSP: 2721 switch (crq->format) { 2722 case IBMVFC_CRQ_INIT: 2723 dev_info(vhost->dev, "Partner initialized\n"); 2724 /* Send back a response */ 2725 rc = ibmvfc_send_crq_init_complete(vhost); 2726 if (rc == 0) 2727 ibmvfc_init_host(vhost); 2728 else 2729 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2730 break; 2731 case IBMVFC_CRQ_INIT_COMPLETE: 2732 dev_info(vhost->dev, "Partner initialization complete\n"); 2733 ibmvfc_init_host(vhost); 2734 break; 2735 default: 2736 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2737 } 2738 return; 2739 case IBMVFC_CRQ_XPORT_EVENT: 2740 vhost->state = IBMVFC_NO_CRQ; 2741 vhost->logged_in = 0; 2742 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2743 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2744 /* We need to re-setup the interpartition connection */ 2745 dev_info(vhost->dev, "Partition migrated, Re-enabling adapter\n"); 2746 vhost->client_migrated = 1; 2747 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2748 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2749 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 2750 } else if (crq->format == IBMVFC_PARTNER_FAILED || crq->format == IBMVFC_PARTNER_DEREGISTER) { 2751 dev_err(vhost->dev, "Host partner adapter deregistered or failed (rc=%d)\n", crq->format); 2752 ibmvfc_purge_requests(vhost, DID_ERROR); 2753 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2754 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 2755 } else { 2756 dev_err(vhost->dev, "Received unknown transport event from partner (rc=%d)\n", crq->format); 2757 } 2758 return; 2759 case IBMVFC_CRQ_CMD_RSP: 2760 break; 2761 default: 2762 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2763 return; 2764 } 2765 2766 if (crq->format == IBMVFC_ASYNC_EVENT) 2767 return; 2768 2769 /* The only kind of payload CRQs we should get are responses to 2770 * things we send. Make sure this response is to something we 2771 * actually sent 2772 */ 2773 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2774 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2775 crq->ioba); 2776 return; 2777 } 2778 2779 if (unlikely(atomic_read(&evt->free))) { 2780 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2781 crq->ioba); 2782 return; 2783 } 2784 2785 del_timer(&evt->timer); 2786 list_del(&evt->queue); 2787 ibmvfc_trc_end(evt); 2788 evt->done(evt); 2789 } 2790 2791 /** 2792 * ibmvfc_scan_finished - Check if the device scan is done. 2793 * @shost: scsi host struct 2794 * @time: current elapsed time 2795 * 2796 * Returns: 2797 * 0 if scan is not done / 1 if scan is done 2798 **/ 2799 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2800 { 2801 unsigned long flags; 2802 struct ibmvfc_host *vhost = shost_priv(shost); 2803 int done = 0; 2804 2805 spin_lock_irqsave(shost->host_lock, flags); 2806 if (time >= (init_timeout * HZ)) { 2807 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2808 "continuing initialization\n", init_timeout); 2809 done = 1; 2810 } 2811 2812 if (vhost->scan_complete) 2813 done = 1; 2814 spin_unlock_irqrestore(shost->host_lock, flags); 2815 return done; 2816 } 2817 2818 /** 2819 * ibmvfc_slave_alloc - Setup the device's task set value 2820 * @sdev: struct scsi_device device to configure 2821 * 2822 * Set the device's task set value so that error handling works as 2823 * expected. 2824 * 2825 * Returns: 2826 * 0 on success / -ENXIO if device does not exist 2827 **/ 2828 static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2829 { 2830 struct Scsi_Host *shost = sdev->host; 2831 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2832 struct ibmvfc_host *vhost = shost_priv(shost); 2833 unsigned long flags = 0; 2834 2835 if (!rport || fc_remote_port_chkready(rport)) 2836 return -ENXIO; 2837 2838 spin_lock_irqsave(shost->host_lock, flags); 2839 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2840 spin_unlock_irqrestore(shost->host_lock, flags); 2841 return 0; 2842 } 2843 2844 /** 2845 * ibmvfc_target_alloc - Setup the target's task set value 2846 * @starget: struct scsi_target 2847 * 2848 * Set the target's task set value so that error handling works as 2849 * expected. 2850 * 2851 * Returns: 2852 * 0 on success / -ENXIO if device does not exist 2853 **/ 2854 static int ibmvfc_target_alloc(struct scsi_target *starget) 2855 { 2856 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2857 struct ibmvfc_host *vhost = shost_priv(shost); 2858 unsigned long flags = 0; 2859 2860 spin_lock_irqsave(shost->host_lock, flags); 2861 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2862 spin_unlock_irqrestore(shost->host_lock, flags); 2863 return 0; 2864 } 2865 2866 /** 2867 * ibmvfc_slave_configure - Configure the device 2868 * @sdev: struct scsi_device device to configure 2869 * 2870 * Enable allow_restart for a device if it is a disk. Adjust the 2871 * queue_depth here also. 2872 * 2873 * Returns: 2874 * 0 2875 **/ 2876 static int ibmvfc_slave_configure(struct scsi_device *sdev) 2877 { 2878 struct Scsi_Host *shost = sdev->host; 2879 unsigned long flags = 0; 2880 2881 spin_lock_irqsave(shost->host_lock, flags); 2882 if (sdev->type == TYPE_DISK) 2883 sdev->allow_restart = 1; 2884 spin_unlock_irqrestore(shost->host_lock, flags); 2885 return 0; 2886 } 2887 2888 /** 2889 * ibmvfc_change_queue_depth - Change the device's queue depth 2890 * @sdev: scsi device struct 2891 * @qdepth: depth to set 2892 * @reason: calling context 2893 * 2894 * Return value: 2895 * actual depth set 2896 **/ 2897 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 2898 { 2899 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2900 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2901 2902 return scsi_change_queue_depth(sdev, qdepth); 2903 } 2904 2905 static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2906 struct device_attribute *attr, char *buf) 2907 { 2908 struct Scsi_Host *shost = class_to_shost(dev); 2909 struct ibmvfc_host *vhost = shost_priv(shost); 2910 2911 return snprintf(buf, PAGE_SIZE, "%s\n", 2912 vhost->login_buf->resp.partition_name); 2913 } 2914 2915 static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2916 struct device_attribute *attr, char *buf) 2917 { 2918 struct Scsi_Host *shost = class_to_shost(dev); 2919 struct ibmvfc_host *vhost = shost_priv(shost); 2920 2921 return snprintf(buf, PAGE_SIZE, "%s\n", 2922 vhost->login_buf->resp.device_name); 2923 } 2924 2925 static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2926 struct device_attribute *attr, char *buf) 2927 { 2928 struct Scsi_Host *shost = class_to_shost(dev); 2929 struct ibmvfc_host *vhost = shost_priv(shost); 2930 2931 return snprintf(buf, PAGE_SIZE, "%s\n", 2932 vhost->login_buf->resp.port_loc_code); 2933 } 2934 2935 static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2936 struct device_attribute *attr, char *buf) 2937 { 2938 struct Scsi_Host *shost = class_to_shost(dev); 2939 struct ibmvfc_host *vhost = shost_priv(shost); 2940 2941 return snprintf(buf, PAGE_SIZE, "%s\n", 2942 vhost->login_buf->resp.drc_name); 2943 } 2944 2945 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2946 struct device_attribute *attr, char *buf) 2947 { 2948 struct Scsi_Host *shost = class_to_shost(dev); 2949 struct ibmvfc_host *vhost = shost_priv(shost); 2950 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2951 } 2952 2953 static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 2954 struct device_attribute *attr, char *buf) 2955 { 2956 struct Scsi_Host *shost = class_to_shost(dev); 2957 struct ibmvfc_host *vhost = shost_priv(shost); 2958 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); 2959 } 2960 2961 /** 2962 * ibmvfc_show_log_level - Show the adapter's error logging level 2963 * @dev: class device struct 2964 * @buf: buffer 2965 * 2966 * Return value: 2967 * number of bytes printed to buffer 2968 **/ 2969 static ssize_t ibmvfc_show_log_level(struct device *dev, 2970 struct device_attribute *attr, char *buf) 2971 { 2972 struct Scsi_Host *shost = class_to_shost(dev); 2973 struct ibmvfc_host *vhost = shost_priv(shost); 2974 unsigned long flags = 0; 2975 int len; 2976 2977 spin_lock_irqsave(shost->host_lock, flags); 2978 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2979 spin_unlock_irqrestore(shost->host_lock, flags); 2980 return len; 2981 } 2982 2983 /** 2984 * ibmvfc_store_log_level - Change the adapter's error logging level 2985 * @dev: class device struct 2986 * @buf: buffer 2987 * 2988 * Return value: 2989 * number of bytes printed to buffer 2990 **/ 2991 static ssize_t ibmvfc_store_log_level(struct device *dev, 2992 struct device_attribute *attr, 2993 const char *buf, size_t count) 2994 { 2995 struct Scsi_Host *shost = class_to_shost(dev); 2996 struct ibmvfc_host *vhost = shost_priv(shost); 2997 unsigned long flags = 0; 2998 2999 spin_lock_irqsave(shost->host_lock, flags); 3000 vhost->log_level = simple_strtoul(buf, NULL, 10); 3001 spin_unlock_irqrestore(shost->host_lock, flags); 3002 return strlen(buf); 3003 } 3004 3005 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 3006 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 3007 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 3008 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 3009 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 3010 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 3011 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 3012 ibmvfc_show_log_level, ibmvfc_store_log_level); 3013 3014 #ifdef CONFIG_SCSI_IBMVFC_TRACE 3015 /** 3016 * ibmvfc_read_trace - Dump the adapter trace 3017 * @filp: open sysfs file 3018 * @kobj: kobject struct 3019 * @bin_attr: bin_attribute struct 3020 * @buf: buffer 3021 * @off: offset 3022 * @count: buffer size 3023 * 3024 * Return value: 3025 * number of bytes printed to buffer 3026 **/ 3027 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 3028 struct bin_attribute *bin_attr, 3029 char *buf, loff_t off, size_t count) 3030 { 3031 struct device *dev = container_of(kobj, struct device, kobj); 3032 struct Scsi_Host *shost = class_to_shost(dev); 3033 struct ibmvfc_host *vhost = shost_priv(shost); 3034 unsigned long flags = 0; 3035 int size = IBMVFC_TRACE_SIZE; 3036 char *src = (char *)vhost->trace; 3037 3038 if (off > size) 3039 return 0; 3040 if (off + count > size) { 3041 size -= off; 3042 count = size; 3043 } 3044 3045 spin_lock_irqsave(shost->host_lock, flags); 3046 memcpy(buf, &src[off], count); 3047 spin_unlock_irqrestore(shost->host_lock, flags); 3048 return count; 3049 } 3050 3051 static struct bin_attribute ibmvfc_trace_attr = { 3052 .attr = { 3053 .name = "trace", 3054 .mode = S_IRUGO, 3055 }, 3056 .size = 0, 3057 .read = ibmvfc_read_trace, 3058 }; 3059 #endif 3060 3061 static struct device_attribute *ibmvfc_attrs[] = { 3062 &dev_attr_partition_name, 3063 &dev_attr_device_name, 3064 &dev_attr_port_loc_code, 3065 &dev_attr_drc_name, 3066 &dev_attr_npiv_version, 3067 &dev_attr_capabilities, 3068 &dev_attr_log_level, 3069 NULL 3070 }; 3071 3072 static struct scsi_host_template driver_template = { 3073 .module = THIS_MODULE, 3074 .name = "IBM POWER Virtual FC Adapter", 3075 .proc_name = IBMVFC_NAME, 3076 .queuecommand = ibmvfc_queuecommand, 3077 .eh_timed_out = fc_eh_timed_out, 3078 .eh_abort_handler = ibmvfc_eh_abort_handler, 3079 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3080 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3081 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3082 .slave_alloc = ibmvfc_slave_alloc, 3083 .slave_configure = ibmvfc_slave_configure, 3084 .target_alloc = ibmvfc_target_alloc, 3085 .scan_finished = ibmvfc_scan_finished, 3086 .change_queue_depth = ibmvfc_change_queue_depth, 3087 .cmd_per_lun = 16, 3088 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3089 .this_id = -1, 3090 .sg_tablesize = SG_ALL, 3091 .max_sectors = IBMVFC_MAX_SECTORS, 3092 .shost_attrs = ibmvfc_attrs, 3093 .track_queue_depth = 1, 3094 }; 3095 3096 /** 3097 * ibmvfc_next_async_crq - Returns the next entry in async queue 3098 * @vhost: ibmvfc host struct 3099 * 3100 * Returns: 3101 * Pointer to next entry in queue / NULL if empty 3102 **/ 3103 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3104 { 3105 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 3106 struct ibmvfc_async_crq *crq; 3107 3108 crq = &async_crq->msgs[async_crq->cur]; 3109 if (crq->valid & 0x80) { 3110 if (++async_crq->cur == async_crq->size) 3111 async_crq->cur = 0; 3112 rmb(); 3113 } else 3114 crq = NULL; 3115 3116 return crq; 3117 } 3118 3119 /** 3120 * ibmvfc_next_crq - Returns the next entry in message queue 3121 * @vhost: ibmvfc host struct 3122 * 3123 * Returns: 3124 * Pointer to next entry in queue / NULL if empty 3125 **/ 3126 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3127 { 3128 struct ibmvfc_crq_queue *queue = &vhost->crq; 3129 struct ibmvfc_crq *crq; 3130 3131 crq = &queue->msgs[queue->cur]; 3132 if (crq->valid & 0x80) { 3133 if (++queue->cur == queue->size) 3134 queue->cur = 0; 3135 rmb(); 3136 } else 3137 crq = NULL; 3138 3139 return crq; 3140 } 3141 3142 /** 3143 * ibmvfc_interrupt - Interrupt handler 3144 * @irq: number of irq to handle, not used 3145 * @dev_instance: ibmvfc_host that received interrupt 3146 * 3147 * Returns: 3148 * IRQ_HANDLED 3149 **/ 3150 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3151 { 3152 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3153 unsigned long flags; 3154 3155 spin_lock_irqsave(vhost->host->host_lock, flags); 3156 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3157 tasklet_schedule(&vhost->tasklet); 3158 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3159 return IRQ_HANDLED; 3160 } 3161 3162 /** 3163 * ibmvfc_tasklet - Interrupt handler tasklet 3164 * @data: ibmvfc host struct 3165 * 3166 * Returns: 3167 * Nothing 3168 **/ 3169 static void ibmvfc_tasklet(void *data) 3170 { 3171 struct ibmvfc_host *vhost = data; 3172 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3173 struct ibmvfc_crq *crq; 3174 struct ibmvfc_async_crq *async; 3175 unsigned long flags; 3176 int done = 0; 3177 3178 spin_lock_irqsave(vhost->host->host_lock, flags); 3179 while (!done) { 3180 /* Pull all the valid messages off the async CRQ */ 3181 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3182 ibmvfc_handle_async(async, vhost); 3183 async->valid = 0; 3184 wmb(); 3185 } 3186 3187 /* Pull all the valid messages off the CRQ */ 3188 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3189 ibmvfc_handle_crq(crq, vhost); 3190 crq->valid = 0; 3191 wmb(); 3192 } 3193 3194 vio_enable_interrupts(vdev); 3195 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3196 vio_disable_interrupts(vdev); 3197 ibmvfc_handle_async(async, vhost); 3198 async->valid = 0; 3199 wmb(); 3200 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3201 vio_disable_interrupts(vdev); 3202 ibmvfc_handle_crq(crq, vhost); 3203 crq->valid = 0; 3204 wmb(); 3205 } else 3206 done = 1; 3207 } 3208 3209 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3210 } 3211 3212 /** 3213 * ibmvfc_init_tgt - Set the next init job step for the target 3214 * @tgt: ibmvfc target struct 3215 * @job_step: job step to perform 3216 * 3217 **/ 3218 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3219 void (*job_step) (struct ibmvfc_target *)) 3220 { 3221 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 3222 tgt->job_step = job_step; 3223 wake_up(&tgt->vhost->work_wait_q); 3224 } 3225 3226 /** 3227 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3228 * @tgt: ibmvfc target struct 3229 * @job_step: initialization job step 3230 * 3231 * Returns: 1 if step will be retried / 0 if not 3232 * 3233 **/ 3234 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3235 void (*job_step) (struct ibmvfc_target *)) 3236 { 3237 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3238 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3239 wake_up(&tgt->vhost->work_wait_q); 3240 return 0; 3241 } else 3242 ibmvfc_init_tgt(tgt, job_step); 3243 return 1; 3244 } 3245 3246 /* Defined in FC-LS */ 3247 static const struct { 3248 int code; 3249 int retry; 3250 int logged_in; 3251 } prli_rsp [] = { 3252 { 0, 1, 0 }, 3253 { 1, 0, 1 }, 3254 { 2, 1, 0 }, 3255 { 3, 1, 0 }, 3256 { 4, 0, 0 }, 3257 { 5, 0, 0 }, 3258 { 6, 0, 1 }, 3259 { 7, 0, 0 }, 3260 { 8, 1, 0 }, 3261 }; 3262 3263 /** 3264 * ibmvfc_get_prli_rsp - Find PRLI response index 3265 * @flags: PRLI response flags 3266 * 3267 **/ 3268 static int ibmvfc_get_prli_rsp(u16 flags) 3269 { 3270 int i; 3271 int code = (flags & 0x0f00) >> 8; 3272 3273 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3274 if (prli_rsp[i].code == code) 3275 return i; 3276 3277 return 0; 3278 } 3279 3280 /** 3281 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3282 * @evt: ibmvfc event struct 3283 * 3284 **/ 3285 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3286 { 3287 struct ibmvfc_target *tgt = evt->tgt; 3288 struct ibmvfc_host *vhost = evt->vhost; 3289 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3290 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3291 u32 status = be16_to_cpu(rsp->common.status); 3292 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3293 3294 vhost->discovery_threads--; 3295 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3296 switch (status) { 3297 case IBMVFC_MAD_SUCCESS: 3298 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3299 parms->type, parms->flags, parms->service_parms); 3300 3301 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3302 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); 3303 if (prli_rsp[index].logged_in) { 3304 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { 3305 tgt->need_login = 0; 3306 tgt->ids.roles = 0; 3307 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) 3308 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3309 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) 3310 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3311 tgt->add_rport = 1; 3312 } else 3313 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3314 } else if (prli_rsp[index].retry) 3315 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3316 else 3317 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3318 } else 3319 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3320 break; 3321 case IBMVFC_MAD_DRIVER_FAILED: 3322 break; 3323 case IBMVFC_MAD_CRQ_ERROR: 3324 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3325 break; 3326 case IBMVFC_MAD_FAILED: 3327 default: 3328 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && 3329 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) 3330 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3331 else if (tgt->logo_rcvd) 3332 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3333 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3334 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3335 else 3336 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3337 3338 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3339 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3340 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), status); 3341 break; 3342 } 3343 3344 kref_put(&tgt->kref, ibmvfc_release_tgt); 3345 ibmvfc_free_event(evt); 3346 wake_up(&vhost->work_wait_q); 3347 } 3348 3349 /** 3350 * ibmvfc_tgt_send_prli - Send a process login 3351 * @tgt: ibmvfc target struct 3352 * 3353 **/ 3354 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3355 { 3356 struct ibmvfc_process_login *prli; 3357 struct ibmvfc_host *vhost = tgt->vhost; 3358 struct ibmvfc_event *evt; 3359 3360 if (vhost->discovery_threads >= disc_threads) 3361 return; 3362 3363 kref_get(&tgt->kref); 3364 evt = ibmvfc_get_event(vhost); 3365 vhost->discovery_threads++; 3366 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 3367 evt->tgt = tgt; 3368 prli = &evt->iu.prli; 3369 memset(prli, 0, sizeof(*prli)); 3370 prli->common.version = cpu_to_be32(1); 3371 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); 3372 prli->common.length = cpu_to_be16(sizeof(*prli)); 3373 prli->scsi_id = cpu_to_be64(tgt->scsi_id); 3374 3375 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 3376 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); 3377 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); 3378 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED); 3379 3380 if (cls3_error) 3381 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY); 3382 3383 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3384 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3385 vhost->discovery_threads--; 3386 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3387 kref_put(&tgt->kref, ibmvfc_release_tgt); 3388 } else 3389 tgt_dbg(tgt, "Sent process login\n"); 3390 } 3391 3392 /** 3393 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 3394 * @evt: ibmvfc event struct 3395 * 3396 **/ 3397 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 3398 { 3399 struct ibmvfc_target *tgt = evt->tgt; 3400 struct ibmvfc_host *vhost = evt->vhost; 3401 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 3402 u32 status = be16_to_cpu(rsp->common.status); 3403 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3404 3405 vhost->discovery_threads--; 3406 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3407 switch (status) { 3408 case IBMVFC_MAD_SUCCESS: 3409 tgt_dbg(tgt, "Port Login succeeded\n"); 3410 if (tgt->ids.port_name && 3411 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 3412 vhost->reinit = 1; 3413 tgt_dbg(tgt, "Port re-init required\n"); 3414 break; 3415 } 3416 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3417 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3418 tgt->ids.port_id = tgt->scsi_id; 3419 memcpy(&tgt->service_parms, &rsp->service_parms, 3420 sizeof(tgt->service_parms)); 3421 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3422 sizeof(tgt->service_parms_change)); 3423 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3424 break; 3425 case IBMVFC_MAD_DRIVER_FAILED: 3426 break; 3427 case IBMVFC_MAD_CRQ_ERROR: 3428 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3429 break; 3430 case IBMVFC_MAD_FAILED: 3431 default: 3432 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3433 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3434 else 3435 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3436 3437 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3438 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3439 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), 3440 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), 3441 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status); 3442 break; 3443 } 3444 3445 kref_put(&tgt->kref, ibmvfc_release_tgt); 3446 ibmvfc_free_event(evt); 3447 wake_up(&vhost->work_wait_q); 3448 } 3449 3450 /** 3451 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3452 * @tgt: ibmvfc target struct 3453 * 3454 **/ 3455 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3456 { 3457 struct ibmvfc_port_login *plogi; 3458 struct ibmvfc_host *vhost = tgt->vhost; 3459 struct ibmvfc_event *evt; 3460 3461 if (vhost->discovery_threads >= disc_threads) 3462 return; 3463 3464 kref_get(&tgt->kref); 3465 tgt->logo_rcvd = 0; 3466 evt = ibmvfc_get_event(vhost); 3467 vhost->discovery_threads++; 3468 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3469 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3470 evt->tgt = tgt; 3471 plogi = &evt->iu.plogi; 3472 memset(plogi, 0, sizeof(*plogi)); 3473 plogi->common.version = cpu_to_be32(1); 3474 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 3475 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 3476 plogi->scsi_id = cpu_to_be64(tgt->scsi_id); 3477 3478 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3479 vhost->discovery_threads--; 3480 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3481 kref_put(&tgt->kref, ibmvfc_release_tgt); 3482 } else 3483 tgt_dbg(tgt, "Sent port login\n"); 3484 } 3485 3486 /** 3487 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3488 * @evt: ibmvfc event struct 3489 * 3490 **/ 3491 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3492 { 3493 struct ibmvfc_target *tgt = evt->tgt; 3494 struct ibmvfc_host *vhost = evt->vhost; 3495 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3496 u32 status = be16_to_cpu(rsp->common.status); 3497 3498 vhost->discovery_threads--; 3499 ibmvfc_free_event(evt); 3500 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3501 3502 switch (status) { 3503 case IBMVFC_MAD_SUCCESS: 3504 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3505 break; 3506 case IBMVFC_MAD_DRIVER_FAILED: 3507 kref_put(&tgt->kref, ibmvfc_release_tgt); 3508 wake_up(&vhost->work_wait_q); 3509 return; 3510 case IBMVFC_MAD_FAILED: 3511 default: 3512 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3513 break; 3514 } 3515 3516 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3517 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3518 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3519 tgt->scsi_id != tgt->new_scsi_id) 3520 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3521 kref_put(&tgt->kref, ibmvfc_release_tgt); 3522 wake_up(&vhost->work_wait_q); 3523 } 3524 3525 /** 3526 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3527 * @tgt: ibmvfc target struct 3528 * 3529 **/ 3530 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3531 { 3532 struct ibmvfc_implicit_logout *mad; 3533 struct ibmvfc_host *vhost = tgt->vhost; 3534 struct ibmvfc_event *evt; 3535 3536 if (vhost->discovery_threads >= disc_threads) 3537 return; 3538 3539 kref_get(&tgt->kref); 3540 evt = ibmvfc_get_event(vhost); 3541 vhost->discovery_threads++; 3542 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3543 evt->tgt = tgt; 3544 mad = &evt->iu.implicit_logout; 3545 memset(mad, 0, sizeof(*mad)); 3546 mad->common.version = cpu_to_be32(1); 3547 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); 3548 mad->common.length = cpu_to_be16(sizeof(*mad)); 3549 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); 3550 3551 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3552 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3553 vhost->discovery_threads--; 3554 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3555 kref_put(&tgt->kref, ibmvfc_release_tgt); 3556 } else 3557 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3558 } 3559 3560 /** 3561 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3562 * @mad: ibmvfc passthru mad struct 3563 * @tgt: ibmvfc target struct 3564 * 3565 * Returns: 3566 * 1 if PLOGI needed / 0 if PLOGI not needed 3567 **/ 3568 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3569 struct ibmvfc_target *tgt) 3570 { 3571 if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name) 3572 return 1; 3573 if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name) 3574 return 1; 3575 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) 3576 return 1; 3577 return 0; 3578 } 3579 3580 /** 3581 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3582 * @evt: ibmvfc event struct 3583 * 3584 **/ 3585 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3586 { 3587 struct ibmvfc_target *tgt = evt->tgt; 3588 struct ibmvfc_host *vhost = evt->vhost; 3589 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3590 u32 status = be16_to_cpu(mad->common.status); 3591 u8 fc_reason, fc_explain; 3592 3593 vhost->discovery_threads--; 3594 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3595 del_timer(&tgt->timer); 3596 3597 switch (status) { 3598 case IBMVFC_MAD_SUCCESS: 3599 tgt_dbg(tgt, "ADISC succeeded\n"); 3600 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3601 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3602 break; 3603 case IBMVFC_MAD_DRIVER_FAILED: 3604 break; 3605 case IBMVFC_MAD_FAILED: 3606 default: 3607 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3608 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; 3609 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; 3610 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3611 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), 3612 be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error), 3613 ibmvfc_get_fc_type(fc_reason), fc_reason, 3614 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3615 break; 3616 } 3617 3618 kref_put(&tgt->kref, ibmvfc_release_tgt); 3619 ibmvfc_free_event(evt); 3620 wake_up(&vhost->work_wait_q); 3621 } 3622 3623 /** 3624 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3625 * @evt: ibmvfc event struct 3626 * 3627 **/ 3628 static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3629 { 3630 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3631 3632 memset(mad, 0, sizeof(*mad)); 3633 mad->common.version = cpu_to_be32(1); 3634 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 3635 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 3636 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3637 offsetof(struct ibmvfc_passthru_mad, iu)); 3638 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 3639 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3640 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3641 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3642 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3643 offsetof(struct ibmvfc_passthru_fc_iu, payload)); 3644 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3645 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3646 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3647 offsetof(struct ibmvfc_passthru_fc_iu, response)); 3648 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3649 } 3650 3651 /** 3652 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3653 * @evt: ibmvfc event struct 3654 * 3655 * Just cleanup this event struct. Everything else is handled by 3656 * the ADISC completion handler. If the ADISC never actually comes 3657 * back, we still have the timer running on the ADISC event struct 3658 * which will fire and cause the CRQ to get reset. 3659 * 3660 **/ 3661 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3662 { 3663 struct ibmvfc_host *vhost = evt->vhost; 3664 struct ibmvfc_target *tgt = evt->tgt; 3665 3666 tgt_dbg(tgt, "ADISC cancel complete\n"); 3667 vhost->abort_threads--; 3668 ibmvfc_free_event(evt); 3669 kref_put(&tgt->kref, ibmvfc_release_tgt); 3670 wake_up(&vhost->work_wait_q); 3671 } 3672 3673 /** 3674 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3675 * @tgt: ibmvfc target struct 3676 * 3677 * If an ADISC times out, send a cancel. If the cancel times 3678 * out, reset the CRQ. When the ADISC comes back as cancelled, 3679 * log back into the target. 3680 **/ 3681 static void ibmvfc_adisc_timeout(struct timer_list *t) 3682 { 3683 struct ibmvfc_target *tgt = from_timer(tgt, t, timer); 3684 struct ibmvfc_host *vhost = tgt->vhost; 3685 struct ibmvfc_event *evt; 3686 struct ibmvfc_tmf *tmf; 3687 unsigned long flags; 3688 int rc; 3689 3690 tgt_dbg(tgt, "ADISC timeout\n"); 3691 spin_lock_irqsave(vhost->host->host_lock, flags); 3692 if (vhost->abort_threads >= disc_threads || 3693 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3694 vhost->state != IBMVFC_INITIALIZING || 3695 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3696 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3697 return; 3698 } 3699 3700 vhost->abort_threads++; 3701 kref_get(&tgt->kref); 3702 evt = ibmvfc_get_event(vhost); 3703 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3704 3705 evt->tgt = tgt; 3706 tmf = &evt->iu.tmf; 3707 memset(tmf, 0, sizeof(*tmf)); 3708 tmf->common.version = cpu_to_be32(1); 3709 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 3710 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 3711 tmf->scsi_id = cpu_to_be64(tgt->scsi_id); 3712 tmf->cancel_key = cpu_to_be32(tgt->cancel_key); 3713 3714 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3715 3716 if (rc) { 3717 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3718 vhost->abort_threads--; 3719 kref_put(&tgt->kref, ibmvfc_release_tgt); 3720 __ibmvfc_reset_host(vhost); 3721 } else 3722 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3723 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3724 } 3725 3726 /** 3727 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3728 * @tgt: ibmvfc target struct 3729 * 3730 * When sending an ADISC we end up with two timers running. The 3731 * first timer is the timer in the ibmvfc target struct. If this 3732 * fires, we send a cancel to the target. The second timer is the 3733 * timer on the ibmvfc event for the ADISC, which is longer. If that 3734 * fires, it means the ADISC timed out and our attempt to cancel it 3735 * also failed, so we need to reset the CRQ. 3736 **/ 3737 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3738 { 3739 struct ibmvfc_passthru_mad *mad; 3740 struct ibmvfc_host *vhost = tgt->vhost; 3741 struct ibmvfc_event *evt; 3742 3743 if (vhost->discovery_threads >= disc_threads) 3744 return; 3745 3746 kref_get(&tgt->kref); 3747 evt = ibmvfc_get_event(vhost); 3748 vhost->discovery_threads++; 3749 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3750 evt->tgt = tgt; 3751 3752 ibmvfc_init_passthru(evt); 3753 mad = &evt->iu.passthru; 3754 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); 3755 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); 3756 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); 3757 3758 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); 3759 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3760 sizeof(vhost->login_buf->resp.port_name)); 3761 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3762 sizeof(vhost->login_buf->resp.node_name)); 3763 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); 3764 3765 if (timer_pending(&tgt->timer)) 3766 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3767 else { 3768 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3769 add_timer(&tgt->timer); 3770 } 3771 3772 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3773 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3774 vhost->discovery_threads--; 3775 del_timer(&tgt->timer); 3776 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3777 kref_put(&tgt->kref, ibmvfc_release_tgt); 3778 } else 3779 tgt_dbg(tgt, "Sent ADISC\n"); 3780 } 3781 3782 /** 3783 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3784 * @evt: ibmvfc event struct 3785 * 3786 **/ 3787 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3788 { 3789 struct ibmvfc_target *tgt = evt->tgt; 3790 struct ibmvfc_host *vhost = evt->vhost; 3791 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3792 u32 status = be16_to_cpu(rsp->common.status); 3793 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3794 3795 vhost->discovery_threads--; 3796 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3797 switch (status) { 3798 case IBMVFC_MAD_SUCCESS: 3799 tgt_dbg(tgt, "Query Target succeeded\n"); 3800 tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id); 3801 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) 3802 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3803 else 3804 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3805 break; 3806 case IBMVFC_MAD_DRIVER_FAILED: 3807 break; 3808 case IBMVFC_MAD_CRQ_ERROR: 3809 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3810 break; 3811 case IBMVFC_MAD_FAILED: 3812 default: 3813 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3814 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && 3815 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) 3816 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3817 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3818 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3819 else 3820 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3821 3822 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3823 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3824 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), 3825 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), 3826 ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), 3827 status); 3828 break; 3829 } 3830 3831 kref_put(&tgt->kref, ibmvfc_release_tgt); 3832 ibmvfc_free_event(evt); 3833 wake_up(&vhost->work_wait_q); 3834 } 3835 3836 /** 3837 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3838 * @tgt: ibmvfc target struct 3839 * 3840 **/ 3841 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3842 { 3843 struct ibmvfc_query_tgt *query_tgt; 3844 struct ibmvfc_host *vhost = tgt->vhost; 3845 struct ibmvfc_event *evt; 3846 3847 if (vhost->discovery_threads >= disc_threads) 3848 return; 3849 3850 kref_get(&tgt->kref); 3851 evt = ibmvfc_get_event(vhost); 3852 vhost->discovery_threads++; 3853 evt->tgt = tgt; 3854 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3855 query_tgt = &evt->iu.query_tgt; 3856 memset(query_tgt, 0, sizeof(*query_tgt)); 3857 query_tgt->common.version = cpu_to_be32(1); 3858 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); 3859 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); 3860 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); 3861 3862 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3863 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3864 vhost->discovery_threads--; 3865 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3866 kref_put(&tgt->kref, ibmvfc_release_tgt); 3867 } else 3868 tgt_dbg(tgt, "Sent Query Target\n"); 3869 } 3870 3871 /** 3872 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3873 * @vhost: ibmvfc host struct 3874 * @scsi_id: SCSI ID to allocate target for 3875 * 3876 * Returns: 3877 * 0 on success / other on failure 3878 **/ 3879 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3880 { 3881 struct ibmvfc_target *tgt; 3882 unsigned long flags; 3883 3884 spin_lock_irqsave(vhost->host->host_lock, flags); 3885 list_for_each_entry(tgt, &vhost->targets, queue) { 3886 if (tgt->scsi_id == scsi_id) { 3887 if (tgt->need_login) 3888 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3889 goto unlock_out; 3890 } 3891 } 3892 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3893 3894 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3895 memset(tgt, 0, sizeof(*tgt)); 3896 tgt->scsi_id = scsi_id; 3897 tgt->new_scsi_id = scsi_id; 3898 tgt->vhost = vhost; 3899 tgt->need_login = 1; 3900 tgt->cancel_key = vhost->task_set++; 3901 timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0); 3902 kref_init(&tgt->kref); 3903 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3904 spin_lock_irqsave(vhost->host->host_lock, flags); 3905 list_add_tail(&tgt->queue, &vhost->targets); 3906 3907 unlock_out: 3908 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3909 return 0; 3910 } 3911 3912 /** 3913 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3914 * @vhost: ibmvfc host struct 3915 * 3916 * Returns: 3917 * 0 on success / other on failure 3918 **/ 3919 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3920 { 3921 int i, rc; 3922 3923 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3924 rc = ibmvfc_alloc_target(vhost, 3925 be32_to_cpu(vhost->disc_buf->scsi_id[i]) & 3926 IBMVFC_DISC_TGT_SCSI_ID_MASK); 3927 3928 return rc; 3929 } 3930 3931 /** 3932 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3933 * @evt: ibmvfc event struct 3934 * 3935 **/ 3936 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3937 { 3938 struct ibmvfc_host *vhost = evt->vhost; 3939 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3940 u32 mad_status = be16_to_cpu(rsp->common.status); 3941 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3942 3943 switch (mad_status) { 3944 case IBMVFC_MAD_SUCCESS: 3945 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3946 vhost->num_targets = be32_to_cpu(rsp->num_written); 3947 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3948 break; 3949 case IBMVFC_MAD_FAILED: 3950 level += ibmvfc_retry_host_init(vhost); 3951 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 3952 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3953 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); 3954 break; 3955 case IBMVFC_MAD_DRIVER_FAILED: 3956 break; 3957 default: 3958 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3959 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3960 break; 3961 } 3962 3963 ibmvfc_free_event(evt); 3964 wake_up(&vhost->work_wait_q); 3965 } 3966 3967 /** 3968 * ibmvfc_discover_targets - Send Discover Targets MAD 3969 * @vhost: ibmvfc host struct 3970 * 3971 **/ 3972 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3973 { 3974 struct ibmvfc_discover_targets *mad; 3975 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3976 3977 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3978 mad = &evt->iu.discover_targets; 3979 memset(mad, 0, sizeof(*mad)); 3980 mad->common.version = cpu_to_be32(1); 3981 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); 3982 mad->common.length = cpu_to_be16(sizeof(*mad)); 3983 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz); 3984 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma); 3985 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz); 3986 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3987 3988 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3989 ibmvfc_dbg(vhost, "Sent discover targets\n"); 3990 else 3991 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3992 } 3993 3994 /** 3995 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 3996 * @evt: ibmvfc event struct 3997 * 3998 **/ 3999 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 4000 { 4001 struct ibmvfc_host *vhost = evt->vhost; 4002 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); 4003 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 4004 unsigned int npiv_max_sectors; 4005 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4006 4007 switch (mad_status) { 4008 case IBMVFC_MAD_SUCCESS: 4009 ibmvfc_free_event(evt); 4010 break; 4011 case IBMVFC_MAD_FAILED: 4012 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4013 level += ibmvfc_retry_host_init(vhost); 4014 else 4015 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4016 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 4017 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4018 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); 4019 ibmvfc_free_event(evt); 4020 return; 4021 case IBMVFC_MAD_CRQ_ERROR: 4022 ibmvfc_retry_host_init(vhost); 4023 case IBMVFC_MAD_DRIVER_FAILED: 4024 ibmvfc_free_event(evt); 4025 return; 4026 default: 4027 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 4028 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4029 ibmvfc_free_event(evt); 4030 return; 4031 } 4032 4033 vhost->client_migrated = 0; 4034 4035 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { 4036 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 4037 rsp->flags); 4038 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4039 wake_up(&vhost->work_wait_q); 4040 return; 4041 } 4042 4043 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { 4044 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 4045 rsp->max_cmds); 4046 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4047 wake_up(&vhost->work_wait_q); 4048 return; 4049 } 4050 4051 vhost->logged_in = 1; 4052 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); 4053 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 4054 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 4055 rsp->drc_name, npiv_max_sectors); 4056 4057 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); 4058 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); 4059 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); 4060 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); 4061 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 4062 fc_host_supported_classes(vhost->host) = 0; 4063 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) 4064 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 4065 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) 4066 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 4067 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) 4068 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 4069 fc_host_maxframe_size(vhost->host) = 4070 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; 4071 4072 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; 4073 vhost->host->max_sectors = npiv_max_sectors; 4074 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4075 wake_up(&vhost->work_wait_q); 4076 } 4077 4078 /** 4079 * ibmvfc_npiv_login - Sends NPIV login 4080 * @vhost: ibmvfc host struct 4081 * 4082 **/ 4083 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 4084 { 4085 struct ibmvfc_npiv_login_mad *mad; 4086 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4087 4088 ibmvfc_gather_partition_info(vhost); 4089 ibmvfc_set_login_info(vhost); 4090 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 4091 4092 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 4093 mad = &evt->iu.npiv_login; 4094 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 4095 mad->common.version = cpu_to_be32(1); 4096 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); 4097 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); 4098 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); 4099 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); 4100 4101 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4102 4103 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4104 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 4105 else 4106 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4107 }; 4108 4109 /** 4110 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 4111 * @vhost: ibmvfc host struct 4112 * 4113 **/ 4114 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 4115 { 4116 struct ibmvfc_host *vhost = evt->vhost; 4117 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); 4118 4119 ibmvfc_free_event(evt); 4120 4121 switch (mad_status) { 4122 case IBMVFC_MAD_SUCCESS: 4123 if (list_empty(&vhost->sent) && 4124 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 4125 ibmvfc_init_host(vhost); 4126 return; 4127 } 4128 break; 4129 case IBMVFC_MAD_FAILED: 4130 case IBMVFC_MAD_NOT_SUPPORTED: 4131 case IBMVFC_MAD_CRQ_ERROR: 4132 case IBMVFC_MAD_DRIVER_FAILED: 4133 default: 4134 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 4135 break; 4136 } 4137 4138 ibmvfc_hard_reset_host(vhost); 4139 } 4140 4141 /** 4142 * ibmvfc_npiv_logout - Issue an NPIV Logout 4143 * @vhost: ibmvfc host struct 4144 * 4145 **/ 4146 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 4147 { 4148 struct ibmvfc_npiv_logout_mad *mad; 4149 struct ibmvfc_event *evt; 4150 4151 evt = ibmvfc_get_event(vhost); 4152 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 4153 4154 mad = &evt->iu.npiv_logout; 4155 memset(mad, 0, sizeof(*mad)); 4156 mad->common.version = cpu_to_be32(1); 4157 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); 4158 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); 4159 4160 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 4161 4162 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4163 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 4164 else 4165 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4166 } 4167 4168 /** 4169 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 4170 * @vhost: ibmvfc host struct 4171 * 4172 * Returns: 4173 * 1 if work to do / 0 if not 4174 **/ 4175 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 4176 { 4177 struct ibmvfc_target *tgt; 4178 4179 list_for_each_entry(tgt, &vhost->targets, queue) { 4180 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 4181 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4182 return 1; 4183 } 4184 4185 return 0; 4186 } 4187 4188 /** 4189 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 4190 * @vhost: ibmvfc host struct 4191 * 4192 * Returns: 4193 * 1 if work to do / 0 if not 4194 **/ 4195 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4196 { 4197 struct ibmvfc_target *tgt; 4198 4199 if (kthread_should_stop()) 4200 return 1; 4201 switch (vhost->action) { 4202 case IBMVFC_HOST_ACTION_NONE: 4203 case IBMVFC_HOST_ACTION_INIT_WAIT: 4204 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4205 return 0; 4206 case IBMVFC_HOST_ACTION_TGT_INIT: 4207 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4208 if (vhost->discovery_threads == disc_threads) 4209 return 0; 4210 list_for_each_entry(tgt, &vhost->targets, queue) 4211 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 4212 return 1; 4213 list_for_each_entry(tgt, &vhost->targets, queue) 4214 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4215 return 0; 4216 return 1; 4217 case IBMVFC_HOST_ACTION_LOGO: 4218 case IBMVFC_HOST_ACTION_INIT: 4219 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4220 case IBMVFC_HOST_ACTION_TGT_DEL: 4221 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4222 case IBMVFC_HOST_ACTION_QUERY: 4223 case IBMVFC_HOST_ACTION_RESET: 4224 case IBMVFC_HOST_ACTION_REENABLE: 4225 default: 4226 break; 4227 } 4228 4229 return 1; 4230 } 4231 4232 /** 4233 * ibmvfc_work_to_do - Is there task level work to do? 4234 * @vhost: ibmvfc host struct 4235 * 4236 * Returns: 4237 * 1 if work to do / 0 if not 4238 **/ 4239 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4240 { 4241 unsigned long flags; 4242 int rc; 4243 4244 spin_lock_irqsave(vhost->host->host_lock, flags); 4245 rc = __ibmvfc_work_to_do(vhost); 4246 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4247 return rc; 4248 } 4249 4250 /** 4251 * ibmvfc_log_ae - Log async events if necessary 4252 * @vhost: ibmvfc host struct 4253 * @events: events to log 4254 * 4255 **/ 4256 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 4257 { 4258 if (events & IBMVFC_AE_RSCN) 4259 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 4260 if ((events & IBMVFC_AE_LINKDOWN) && 4261 vhost->state >= IBMVFC_HALTED) 4262 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 4263 if ((events & IBMVFC_AE_LINKUP) && 4264 vhost->state == IBMVFC_INITIALIZING) 4265 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 4266 } 4267 4268 /** 4269 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 4270 * @tgt: ibmvfc target struct 4271 * 4272 **/ 4273 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 4274 { 4275 struct ibmvfc_host *vhost = tgt->vhost; 4276 struct fc_rport *rport; 4277 unsigned long flags; 4278 4279 tgt_dbg(tgt, "Adding rport\n"); 4280 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 4281 spin_lock_irqsave(vhost->host->host_lock, flags); 4282 4283 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4284 tgt_dbg(tgt, "Deleting rport\n"); 4285 list_del(&tgt->queue); 4286 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4287 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4288 fc_remote_port_delete(rport); 4289 del_timer_sync(&tgt->timer); 4290 kref_put(&tgt->kref, ibmvfc_release_tgt); 4291 return; 4292 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 4293 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4294 return; 4295 } 4296 4297 if (rport) { 4298 tgt_dbg(tgt, "rport add succeeded\n"); 4299 tgt->rport = rport; 4300 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; 4301 rport->supported_classes = 0; 4302 tgt->target_id = rport->scsi_target_id; 4303 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) 4304 rport->supported_classes |= FC_COS_CLASS1; 4305 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) 4306 rport->supported_classes |= FC_COS_CLASS2; 4307 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) 4308 rport->supported_classes |= FC_COS_CLASS3; 4309 if (rport->rqst_q) 4310 blk_queue_max_segments(rport->rqst_q, 1); 4311 } else 4312 tgt_dbg(tgt, "rport add failed\n"); 4313 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4314 } 4315 4316 /** 4317 * ibmvfc_do_work - Do task level work 4318 * @vhost: ibmvfc host struct 4319 * 4320 **/ 4321 static void ibmvfc_do_work(struct ibmvfc_host *vhost) 4322 { 4323 struct ibmvfc_target *tgt; 4324 unsigned long flags; 4325 struct fc_rport *rport; 4326 int rc; 4327 4328 ibmvfc_log_ae(vhost, vhost->events_to_log); 4329 spin_lock_irqsave(vhost->host->host_lock, flags); 4330 vhost->events_to_log = 0; 4331 switch (vhost->action) { 4332 case IBMVFC_HOST_ACTION_NONE: 4333 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4334 case IBMVFC_HOST_ACTION_INIT_WAIT: 4335 break; 4336 case IBMVFC_HOST_ACTION_RESET: 4337 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4338 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4339 rc = ibmvfc_reset_crq(vhost); 4340 spin_lock_irqsave(vhost->host->host_lock, flags); 4341 if (rc == H_CLOSED) 4342 vio_enable_interrupts(to_vio_dev(vhost->dev)); 4343 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 4344 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 4345 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4346 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 4347 } 4348 break; 4349 case IBMVFC_HOST_ACTION_REENABLE: 4350 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4351 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4352 rc = ibmvfc_reenable_crq_queue(vhost); 4353 spin_lock_irqsave(vhost->host->host_lock, flags); 4354 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 4355 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4356 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 4357 } 4358 break; 4359 case IBMVFC_HOST_ACTION_LOGO: 4360 vhost->job_step(vhost); 4361 break; 4362 case IBMVFC_HOST_ACTION_INIT: 4363 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 4364 if (vhost->delay_init) { 4365 vhost->delay_init = 0; 4366 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4367 ssleep(15); 4368 return; 4369 } else 4370 vhost->job_step(vhost); 4371 break; 4372 case IBMVFC_HOST_ACTION_QUERY: 4373 list_for_each_entry(tgt, &vhost->targets, queue) 4374 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 4375 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 4376 break; 4377 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4378 list_for_each_entry(tgt, &vhost->targets, queue) { 4379 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4380 tgt->job_step(tgt); 4381 break; 4382 } 4383 } 4384 4385 if (!ibmvfc_dev_init_to_do(vhost)) 4386 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 4387 break; 4388 case IBMVFC_HOST_ACTION_TGT_DEL: 4389 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4390 list_for_each_entry(tgt, &vhost->targets, queue) { 4391 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4392 tgt_dbg(tgt, "Deleting rport\n"); 4393 rport = tgt->rport; 4394 tgt->rport = NULL; 4395 list_del(&tgt->queue); 4396 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4397 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4398 if (rport) 4399 fc_remote_port_delete(rport); 4400 del_timer_sync(&tgt->timer); 4401 kref_put(&tgt->kref, ibmvfc_release_tgt); 4402 return; 4403 } 4404 } 4405 4406 if (vhost->state == IBMVFC_INITIALIZING) { 4407 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 4408 if (vhost->reinit) { 4409 vhost->reinit = 0; 4410 scsi_block_requests(vhost->host); 4411 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4412 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4413 } else { 4414 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 4415 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4416 wake_up(&vhost->init_wait_q); 4417 schedule_work(&vhost->rport_add_work_q); 4418 vhost->init_retries = 0; 4419 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4420 scsi_unblock_requests(vhost->host); 4421 } 4422 4423 return; 4424 } else { 4425 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 4426 vhost->job_step = ibmvfc_discover_targets; 4427 } 4428 } else { 4429 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4430 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4431 scsi_unblock_requests(vhost->host); 4432 wake_up(&vhost->init_wait_q); 4433 return; 4434 } 4435 break; 4436 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4437 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4438 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4439 ibmvfc_alloc_targets(vhost); 4440 spin_lock_irqsave(vhost->host->host_lock, flags); 4441 break; 4442 case IBMVFC_HOST_ACTION_TGT_INIT: 4443 list_for_each_entry(tgt, &vhost->targets, queue) { 4444 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4445 tgt->job_step(tgt); 4446 break; 4447 } 4448 } 4449 4450 if (!ibmvfc_dev_init_to_do(vhost)) 4451 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4452 break; 4453 default: 4454 break; 4455 } 4456 4457 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4458 } 4459 4460 /** 4461 * ibmvfc_work - Do task level work 4462 * @data: ibmvfc host struct 4463 * 4464 * Returns: 4465 * zero 4466 **/ 4467 static int ibmvfc_work(void *data) 4468 { 4469 struct ibmvfc_host *vhost = data; 4470 int rc; 4471 4472 set_user_nice(current, MIN_NICE); 4473 4474 while (1) { 4475 rc = wait_event_interruptible(vhost->work_wait_q, 4476 ibmvfc_work_to_do(vhost)); 4477 4478 BUG_ON(rc); 4479 4480 if (kthread_should_stop()) 4481 break; 4482 4483 ibmvfc_do_work(vhost); 4484 } 4485 4486 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4487 return 0; 4488 } 4489 4490 /** 4491 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4492 * @vhost: ibmvfc host struct 4493 * 4494 * Allocates a page for messages, maps it for dma, and registers 4495 * the crq with the hypervisor. 4496 * 4497 * Return value: 4498 * zero on success / other on failure 4499 **/ 4500 static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4501 { 4502 int rc, retrc = -ENOMEM; 4503 struct device *dev = vhost->dev; 4504 struct vio_dev *vdev = to_vio_dev(dev); 4505 struct ibmvfc_crq_queue *crq = &vhost->crq; 4506 4507 ENTER; 4508 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4509 4510 if (!crq->msgs) 4511 return -ENOMEM; 4512 4513 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4514 crq->msg_token = dma_map_single(dev, crq->msgs, 4515 PAGE_SIZE, DMA_BIDIRECTIONAL); 4516 4517 if (dma_mapping_error(dev, crq->msg_token)) 4518 goto map_failed; 4519 4520 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4521 crq->msg_token, PAGE_SIZE); 4522 4523 if (rc == H_RESOURCE) 4524 /* maybe kexecing and resource is busy. try a reset */ 4525 retrc = rc = ibmvfc_reset_crq(vhost); 4526 4527 if (rc == H_CLOSED) 4528 dev_warn(dev, "Partner adapter not ready\n"); 4529 else if (rc) { 4530 dev_warn(dev, "Error %d opening adapter\n", rc); 4531 goto reg_crq_failed; 4532 } 4533 4534 retrc = 0; 4535 4536 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4537 4538 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4539 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4540 goto req_irq_failed; 4541 } 4542 4543 if ((rc = vio_enable_interrupts(vdev))) { 4544 dev_err(dev, "Error %d enabling interrupts\n", rc); 4545 goto req_irq_failed; 4546 } 4547 4548 crq->cur = 0; 4549 LEAVE; 4550 return retrc; 4551 4552 req_irq_failed: 4553 tasklet_kill(&vhost->tasklet); 4554 do { 4555 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4556 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4557 reg_crq_failed: 4558 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4559 map_failed: 4560 free_page((unsigned long)crq->msgs); 4561 return retrc; 4562 } 4563 4564 /** 4565 * ibmvfc_free_mem - Free memory for vhost 4566 * @vhost: ibmvfc host struct 4567 * 4568 * Return value: 4569 * none 4570 **/ 4571 static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4572 { 4573 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4574 4575 ENTER; 4576 mempool_destroy(vhost->tgt_pool); 4577 kfree(vhost->trace); 4578 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4579 vhost->disc_buf_dma); 4580 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4581 vhost->login_buf, vhost->login_buf_dma); 4582 dma_pool_destroy(vhost->sg_pool); 4583 dma_unmap_single(vhost->dev, async_q->msg_token, 4584 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4585 free_page((unsigned long)async_q->msgs); 4586 LEAVE; 4587 } 4588 4589 /** 4590 * ibmvfc_alloc_mem - Allocate memory for vhost 4591 * @vhost: ibmvfc host struct 4592 * 4593 * Return value: 4594 * 0 on success / non-zero on failure 4595 **/ 4596 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4597 { 4598 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4599 struct device *dev = vhost->dev; 4600 4601 ENTER; 4602 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4603 if (!async_q->msgs) { 4604 dev_err(dev, "Couldn't allocate async queue.\n"); 4605 goto nomem; 4606 } 4607 4608 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4609 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4610 async_q->size * sizeof(*async_q->msgs), 4611 DMA_BIDIRECTIONAL); 4612 4613 if (dma_mapping_error(dev, async_q->msg_token)) { 4614 dev_err(dev, "Failed to map async queue\n"); 4615 goto free_async_crq; 4616 } 4617 4618 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4619 SG_ALL * sizeof(struct srp_direct_buf), 4620 sizeof(struct srp_direct_buf), 0); 4621 4622 if (!vhost->sg_pool) { 4623 dev_err(dev, "Failed to allocate sg pool\n"); 4624 goto unmap_async_crq; 4625 } 4626 4627 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4628 &vhost->login_buf_dma, GFP_KERNEL); 4629 4630 if (!vhost->login_buf) { 4631 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4632 goto free_sg_pool; 4633 } 4634 4635 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4636 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4637 &vhost->disc_buf_dma, GFP_KERNEL); 4638 4639 if (!vhost->disc_buf) { 4640 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4641 goto free_login_buffer; 4642 } 4643 4644 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4645 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4646 4647 if (!vhost->trace) 4648 goto free_disc_buffer; 4649 4650 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4651 sizeof(struct ibmvfc_target)); 4652 4653 if (!vhost->tgt_pool) { 4654 dev_err(dev, "Couldn't allocate target memory pool\n"); 4655 goto free_trace; 4656 } 4657 4658 LEAVE; 4659 return 0; 4660 4661 free_trace: 4662 kfree(vhost->trace); 4663 free_disc_buffer: 4664 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4665 vhost->disc_buf_dma); 4666 free_login_buffer: 4667 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4668 vhost->login_buf, vhost->login_buf_dma); 4669 free_sg_pool: 4670 dma_pool_destroy(vhost->sg_pool); 4671 unmap_async_crq: 4672 dma_unmap_single(dev, async_q->msg_token, 4673 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4674 free_async_crq: 4675 free_page((unsigned long)async_q->msgs); 4676 nomem: 4677 LEAVE; 4678 return -ENOMEM; 4679 } 4680 4681 /** 4682 * ibmvfc_rport_add_thread - Worker thread for rport adds 4683 * @work: work struct 4684 * 4685 **/ 4686 static void ibmvfc_rport_add_thread(struct work_struct *work) 4687 { 4688 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4689 rport_add_work_q); 4690 struct ibmvfc_target *tgt; 4691 struct fc_rport *rport; 4692 unsigned long flags; 4693 int did_work; 4694 4695 ENTER; 4696 spin_lock_irqsave(vhost->host->host_lock, flags); 4697 do { 4698 did_work = 0; 4699 if (vhost->state != IBMVFC_ACTIVE) 4700 break; 4701 4702 list_for_each_entry(tgt, &vhost->targets, queue) { 4703 if (tgt->add_rport) { 4704 did_work = 1; 4705 tgt->add_rport = 0; 4706 kref_get(&tgt->kref); 4707 rport = tgt->rport; 4708 if (!rport) { 4709 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4710 ibmvfc_tgt_add_rport(tgt); 4711 } else if (get_device(&rport->dev)) { 4712 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4713 tgt_dbg(tgt, "Setting rport roles\n"); 4714 fc_remote_port_rolechg(rport, tgt->ids.roles); 4715 put_device(&rport->dev); 4716 } else { 4717 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4718 } 4719 4720 kref_put(&tgt->kref, ibmvfc_release_tgt); 4721 spin_lock_irqsave(vhost->host->host_lock, flags); 4722 break; 4723 } 4724 } 4725 } while(did_work); 4726 4727 if (vhost->state == IBMVFC_ACTIVE) 4728 vhost->scan_complete = 1; 4729 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4730 LEAVE; 4731 } 4732 4733 /** 4734 * ibmvfc_probe - Adapter hot plug add entry point 4735 * @vdev: vio device struct 4736 * @id: vio device id struct 4737 * 4738 * Return value: 4739 * 0 on success / non-zero on failure 4740 **/ 4741 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4742 { 4743 struct ibmvfc_host *vhost; 4744 struct Scsi_Host *shost; 4745 struct device *dev = &vdev->dev; 4746 int rc = -ENOMEM; 4747 4748 ENTER; 4749 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4750 if (!shost) { 4751 dev_err(dev, "Couldn't allocate host data\n"); 4752 goto out; 4753 } 4754 4755 shost->transportt = ibmvfc_transport_template; 4756 shost->can_queue = max_requests; 4757 shost->max_lun = max_lun; 4758 shost->max_id = max_targets; 4759 shost->max_sectors = IBMVFC_MAX_SECTORS; 4760 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4761 shost->unique_id = shost->host_no; 4762 4763 vhost = shost_priv(shost); 4764 INIT_LIST_HEAD(&vhost->sent); 4765 INIT_LIST_HEAD(&vhost->free); 4766 INIT_LIST_HEAD(&vhost->targets); 4767 sprintf(vhost->name, IBMVFC_NAME); 4768 vhost->host = shost; 4769 vhost->dev = dev; 4770 vhost->partition_number = -1; 4771 vhost->log_level = log_level; 4772 vhost->task_set = 1; 4773 strcpy(vhost->partition_name, "UNKNOWN"); 4774 init_waitqueue_head(&vhost->work_wait_q); 4775 init_waitqueue_head(&vhost->init_wait_q); 4776 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4777 mutex_init(&vhost->passthru_mutex); 4778 4779 if ((rc = ibmvfc_alloc_mem(vhost))) 4780 goto free_scsi_host; 4781 4782 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4783 shost->host_no); 4784 4785 if (IS_ERR(vhost->work_thread)) { 4786 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4787 PTR_ERR(vhost->work_thread)); 4788 goto free_host_mem; 4789 } 4790 4791 if ((rc = ibmvfc_init_crq(vhost))) { 4792 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4793 goto kill_kthread; 4794 } 4795 4796 if ((rc = ibmvfc_init_event_pool(vhost))) { 4797 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4798 goto release_crq; 4799 } 4800 4801 if ((rc = scsi_add_host(shost, dev))) 4802 goto release_event_pool; 4803 4804 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 4805 4806 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4807 &ibmvfc_trace_attr))) { 4808 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4809 goto remove_shost; 4810 } 4811 4812 if (shost_to_fc_host(shost)->rqst_q) 4813 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 4814 dev_set_drvdata(dev, vhost); 4815 spin_lock(&ibmvfc_driver_lock); 4816 list_add_tail(&vhost->queue, &ibmvfc_head); 4817 spin_unlock(&ibmvfc_driver_lock); 4818 4819 ibmvfc_send_crq_init(vhost); 4820 scsi_scan_host(shost); 4821 return 0; 4822 4823 remove_shost: 4824 scsi_remove_host(shost); 4825 release_event_pool: 4826 ibmvfc_free_event_pool(vhost); 4827 release_crq: 4828 ibmvfc_release_crq_queue(vhost); 4829 kill_kthread: 4830 kthread_stop(vhost->work_thread); 4831 free_host_mem: 4832 ibmvfc_free_mem(vhost); 4833 free_scsi_host: 4834 scsi_host_put(shost); 4835 out: 4836 LEAVE; 4837 return rc; 4838 } 4839 4840 /** 4841 * ibmvfc_remove - Adapter hot plug remove entry point 4842 * @vdev: vio device struct 4843 * 4844 * Return value: 4845 * 0 4846 **/ 4847 static int ibmvfc_remove(struct vio_dev *vdev) 4848 { 4849 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4850 unsigned long flags; 4851 4852 ENTER; 4853 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4854 4855 spin_lock_irqsave(vhost->host->host_lock, flags); 4856 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4857 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4858 4859 ibmvfc_wait_while_resetting(vhost); 4860 ibmvfc_release_crq_queue(vhost); 4861 kthread_stop(vhost->work_thread); 4862 fc_remove_host(vhost->host); 4863 scsi_remove_host(vhost->host); 4864 4865 spin_lock_irqsave(vhost->host->host_lock, flags); 4866 ibmvfc_purge_requests(vhost, DID_ERROR); 4867 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4868 ibmvfc_free_event_pool(vhost); 4869 4870 ibmvfc_free_mem(vhost); 4871 spin_lock(&ibmvfc_driver_lock); 4872 list_del(&vhost->queue); 4873 spin_unlock(&ibmvfc_driver_lock); 4874 scsi_host_put(vhost->host); 4875 LEAVE; 4876 return 0; 4877 } 4878 4879 /** 4880 * ibmvfc_resume - Resume from suspend 4881 * @dev: device struct 4882 * 4883 * We may have lost an interrupt across suspend/resume, so kick the 4884 * interrupt handler 4885 * 4886 */ 4887 static int ibmvfc_resume(struct device *dev) 4888 { 4889 unsigned long flags; 4890 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 4891 struct vio_dev *vdev = to_vio_dev(dev); 4892 4893 spin_lock_irqsave(vhost->host->host_lock, flags); 4894 vio_disable_interrupts(vdev); 4895 tasklet_schedule(&vhost->tasklet); 4896 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4897 return 0; 4898 } 4899 4900 /** 4901 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4902 * @vdev: vio device struct 4903 * 4904 * Return value: 4905 * Number of bytes the driver will need to DMA map at the same time in 4906 * order to perform well. 4907 */ 4908 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4909 { 4910 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4911 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4912 } 4913 4914 static const struct vio_device_id ibmvfc_device_table[] = { 4915 {"fcp", "IBM,vfc-client"}, 4916 { "", "" } 4917 }; 4918 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4919 4920 static const struct dev_pm_ops ibmvfc_pm_ops = { 4921 .resume = ibmvfc_resume 4922 }; 4923 4924 static struct vio_driver ibmvfc_driver = { 4925 .id_table = ibmvfc_device_table, 4926 .probe = ibmvfc_probe, 4927 .remove = ibmvfc_remove, 4928 .get_desired_dma = ibmvfc_get_desired_dma, 4929 .name = IBMVFC_NAME, 4930 .pm = &ibmvfc_pm_ops, 4931 }; 4932 4933 static struct fc_function_template ibmvfc_transport_functions = { 4934 .show_host_fabric_name = 1, 4935 .show_host_node_name = 1, 4936 .show_host_port_name = 1, 4937 .show_host_supported_classes = 1, 4938 .show_host_port_type = 1, 4939 .show_host_port_id = 1, 4940 .show_host_maxframe_size = 1, 4941 4942 .get_host_port_state = ibmvfc_get_host_port_state, 4943 .show_host_port_state = 1, 4944 4945 .get_host_speed = ibmvfc_get_host_speed, 4946 .show_host_speed = 1, 4947 4948 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4949 .terminate_rport_io = ibmvfc_terminate_rport_io, 4950 4951 .show_rport_maxframe_size = 1, 4952 .show_rport_supported_classes = 1, 4953 4954 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4955 .show_rport_dev_loss_tmo = 1, 4956 4957 .get_starget_node_name = ibmvfc_get_starget_node_name, 4958 .show_starget_node_name = 1, 4959 4960 .get_starget_port_name = ibmvfc_get_starget_port_name, 4961 .show_starget_port_name = 1, 4962 4963 .get_starget_port_id = ibmvfc_get_starget_port_id, 4964 .show_starget_port_id = 1, 4965 4966 .bsg_request = ibmvfc_bsg_request, 4967 .bsg_timeout = ibmvfc_bsg_timeout, 4968 }; 4969 4970 /** 4971 * ibmvfc_module_init - Initialize the ibmvfc module 4972 * 4973 * Return value: 4974 * 0 on success / other on failure 4975 **/ 4976 static int __init ibmvfc_module_init(void) 4977 { 4978 int rc; 4979 4980 if (!firmware_has_feature(FW_FEATURE_VIO)) 4981 return -ENODEV; 4982 4983 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4984 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4985 4986 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4987 if (!ibmvfc_transport_template) 4988 return -ENOMEM; 4989 4990 rc = vio_register_driver(&ibmvfc_driver); 4991 if (rc) 4992 fc_release_transport(ibmvfc_transport_template); 4993 return rc; 4994 } 4995 4996 /** 4997 * ibmvfc_module_exit - Teardown the ibmvfc module 4998 * 4999 * Return value: 5000 * nothing 5001 **/ 5002 static void __exit ibmvfc_module_exit(void) 5003 { 5004 vio_unregister_driver(&ibmvfc_driver); 5005 fc_release_transport(ibmvfc_transport_template); 5006 } 5007 5008 module_init(ibmvfc_module_init); 5009 module_exit(ibmvfc_module_exit); 5010