1 /* 2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 3 * 4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 5 * 6 * Copyright (C) IBM Corporation, 2008 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24 #include <linux/module.h> 25 #include <linux/moduleparam.h> 26 #include <linux/dma-mapping.h> 27 #include <linux/dmapool.h> 28 #include <linux/delay.h> 29 #include <linux/interrupt.h> 30 #include <linux/kthread.h> 31 #include <linux/slab.h> 32 #include <linux/of.h> 33 #include <linux/pm.h> 34 #include <linux/stringify.h> 35 #include <linux/bsg-lib.h> 36 #include <asm/firmware.h> 37 #include <asm/irq.h> 38 #include <asm/vio.h> 39 #include <scsi/scsi.h> 40 #include <scsi/scsi_cmnd.h> 41 #include <scsi/scsi_host.h> 42 #include <scsi/scsi_device.h> 43 #include <scsi/scsi_tcq.h> 44 #include <scsi/scsi_transport_fc.h> 45 #include <scsi/scsi_bsg_fc.h> 46 #include "ibmvfc.h" 47 48 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 49 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 50 static u64 max_lun = IBMVFC_MAX_LUN; 51 static unsigned int max_targets = IBMVFC_MAX_TARGETS; 52 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 53 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 54 static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 55 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 56 static unsigned int cls3_error = IBMVFC_CLS3_ERROR; 57 static LIST_HEAD(ibmvfc_head); 58 static DEFINE_SPINLOCK(ibmvfc_driver_lock); 59 static struct scsi_transport_template *ibmvfc_transport_template; 60 61 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 62 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 63 MODULE_LICENSE("GPL"); 64 MODULE_VERSION(IBMVFC_DRIVER_VERSION); 65 66 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 67 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 68 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 69 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 70 MODULE_PARM_DESC(default_timeout, 71 "Default timeout in seconds for initialization and EH commands. " 72 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 73 module_param_named(max_requests, max_requests, uint, S_IRUGO); 74 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 75 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 76 module_param_named(max_lun, max_lun, ullong, S_IRUGO); 77 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 78 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 79 module_param_named(max_targets, max_targets, uint, S_IRUGO); 80 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 81 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 82 module_param_named(disc_threads, disc_threads, uint, S_IRUGO); 83 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 84 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 85 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 86 MODULE_PARM_DESC(debug, "Enable driver debug information. " 87 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 88 module_param_named(log_level, log_level, uint, 0); 89 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 90 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 91 module_param_named(cls3_error, cls3_error, uint, 0); 92 MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. " 93 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]"); 94 95 static const struct { 96 u16 status; 97 u16 error; 98 u8 result; 99 u8 retry; 100 int log; 101 char *name; 102 } cmd_status [] = { 103 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 104 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 105 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 106 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 107 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 108 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 109 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 110 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 111 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 112 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 115 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 116 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 117 118 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 119 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 120 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 121 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 122 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 123 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 124 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 125 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 126 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 127 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 128 129 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 131 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 132 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 133 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 134 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 135 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 136 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 137 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 138 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 139 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 140 141 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 142 }; 143 144 static void ibmvfc_npiv_login(struct ibmvfc_host *); 145 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 146 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 147 static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 148 static void ibmvfc_npiv_logout(struct ibmvfc_host *); 149 150 static const char *unknown_error = "unknown error"; 151 152 #ifdef CONFIG_SCSI_IBMVFC_TRACE 153 /** 154 * ibmvfc_trc_start - Log a start trace entry 155 * @evt: ibmvfc event struct 156 * 157 **/ 158 static void ibmvfc_trc_start(struct ibmvfc_event *evt) 159 { 160 struct ibmvfc_host *vhost = evt->vhost; 161 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 162 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 163 struct ibmvfc_trace_entry *entry; 164 165 entry = &vhost->trace[vhost->trace_index++]; 166 entry->evt = evt; 167 entry->time = jiffies; 168 entry->fmt = evt->crq.format; 169 entry->type = IBMVFC_TRC_START; 170 171 switch (entry->fmt) { 172 case IBMVFC_CMD_FORMAT: 173 entry->op_code = vfc_cmd->iu.cdb[0]; 174 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 175 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 176 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 177 entry->u.start.xfer_len = be32_to_cpu(vfc_cmd->iu.xfer_len); 178 break; 179 case IBMVFC_MAD_FORMAT: 180 entry->op_code = be32_to_cpu(mad->opcode); 181 break; 182 default: 183 break; 184 } 185 } 186 187 /** 188 * ibmvfc_trc_end - Log an end trace entry 189 * @evt: ibmvfc event struct 190 * 191 **/ 192 static void ibmvfc_trc_end(struct ibmvfc_event *evt) 193 { 194 struct ibmvfc_host *vhost = evt->vhost; 195 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 196 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 197 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; 198 199 entry->evt = evt; 200 entry->time = jiffies; 201 entry->fmt = evt->crq.format; 202 entry->type = IBMVFC_TRC_END; 203 204 switch (entry->fmt) { 205 case IBMVFC_CMD_FORMAT: 206 entry->op_code = vfc_cmd->iu.cdb[0]; 207 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 208 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 209 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 210 entry->u.end.status = be16_to_cpu(vfc_cmd->status); 211 entry->u.end.error = be16_to_cpu(vfc_cmd->error); 212 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; 213 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; 214 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; 215 break; 216 case IBMVFC_MAD_FORMAT: 217 entry->op_code = be32_to_cpu(mad->opcode); 218 entry->u.end.status = be16_to_cpu(mad->status); 219 break; 220 default: 221 break; 222 223 } 224 } 225 226 #else 227 #define ibmvfc_trc_start(evt) do { } while (0) 228 #define ibmvfc_trc_end(evt) do { } while (0) 229 #endif 230 231 /** 232 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 233 * @status: status / error class 234 * @error: error 235 * 236 * Return value: 237 * index into cmd_status / -EINVAL on failure 238 **/ 239 static int ibmvfc_get_err_index(u16 status, u16 error) 240 { 241 int i; 242 243 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 244 if ((cmd_status[i].status & status) == cmd_status[i].status && 245 cmd_status[i].error == error) 246 return i; 247 248 return -EINVAL; 249 } 250 251 /** 252 * ibmvfc_get_cmd_error - Find the error description for the fcp response 253 * @status: status / error class 254 * @error: error 255 * 256 * Return value: 257 * error description string 258 **/ 259 static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 260 { 261 int rc = ibmvfc_get_err_index(status, error); 262 if (rc >= 0) 263 return cmd_status[rc].name; 264 return unknown_error; 265 } 266 267 /** 268 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 269 * @vfc_cmd: ibmvfc command struct 270 * 271 * Return value: 272 * SCSI result value to return for completed command 273 **/ 274 static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) 275 { 276 int err; 277 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 278 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 279 280 if ((rsp->flags & FCP_RSP_LEN_VALID) && 281 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 282 rsp->data.info.rsp_code)) 283 return DID_ERROR << 16; 284 285 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 286 if (err >= 0) 287 return rsp->scsi_status | (cmd_status[err].result << 16); 288 return rsp->scsi_status | (DID_ERROR << 16); 289 } 290 291 /** 292 * ibmvfc_retry_cmd - Determine if error status is retryable 293 * @status: status / error class 294 * @error: error 295 * 296 * Return value: 297 * 1 if error should be retried / 0 if it should not 298 **/ 299 static int ibmvfc_retry_cmd(u16 status, u16 error) 300 { 301 int rc = ibmvfc_get_err_index(status, error); 302 303 if (rc >= 0) 304 return cmd_status[rc].retry; 305 return 1; 306 } 307 308 static const char *unknown_fc_explain = "unknown fc explain"; 309 310 static const struct { 311 u16 fc_explain; 312 char *name; 313 } ls_explain [] = { 314 { 0x00, "no additional explanation" }, 315 { 0x01, "service parameter error - options" }, 316 { 0x03, "service parameter error - initiator control" }, 317 { 0x05, "service parameter error - recipient control" }, 318 { 0x07, "service parameter error - received data field size" }, 319 { 0x09, "service parameter error - concurrent seq" }, 320 { 0x0B, "service parameter error - credit" }, 321 { 0x0D, "invalid N_Port/F_Port_Name" }, 322 { 0x0E, "invalid node/Fabric Name" }, 323 { 0x0F, "invalid common service parameters" }, 324 { 0x11, "invalid association header" }, 325 { 0x13, "association header required" }, 326 { 0x15, "invalid originator S_ID" }, 327 { 0x17, "invalid OX_ID-RX-ID combination" }, 328 { 0x19, "command (request) already in progress" }, 329 { 0x1E, "N_Port Login requested" }, 330 { 0x1F, "Invalid N_Port_ID" }, 331 }; 332 333 static const struct { 334 u16 fc_explain; 335 char *name; 336 } gs_explain [] = { 337 { 0x00, "no additional explanation" }, 338 { 0x01, "port identifier not registered" }, 339 { 0x02, "port name not registered" }, 340 { 0x03, "node name not registered" }, 341 { 0x04, "class of service not registered" }, 342 { 0x06, "initial process associator not registered" }, 343 { 0x07, "FC-4 TYPEs not registered" }, 344 { 0x08, "symbolic port name not registered" }, 345 { 0x09, "symbolic node name not registered" }, 346 { 0x0A, "port type not registered" }, 347 { 0xF0, "authorization exception" }, 348 { 0xF1, "authentication exception" }, 349 { 0xF2, "data base full" }, 350 { 0xF3, "data base empty" }, 351 { 0xF4, "processing request" }, 352 { 0xF5, "unable to verify connection" }, 353 { 0xF6, "devices not in a common zone" }, 354 }; 355 356 /** 357 * ibmvfc_get_ls_explain - Return the FC Explain description text 358 * @status: FC Explain status 359 * 360 * Returns: 361 * error string 362 **/ 363 static const char *ibmvfc_get_ls_explain(u16 status) 364 { 365 int i; 366 367 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 368 if (ls_explain[i].fc_explain == status) 369 return ls_explain[i].name; 370 371 return unknown_fc_explain; 372 } 373 374 /** 375 * ibmvfc_get_gs_explain - Return the FC Explain description text 376 * @status: FC Explain status 377 * 378 * Returns: 379 * error string 380 **/ 381 static const char *ibmvfc_get_gs_explain(u16 status) 382 { 383 int i; 384 385 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 386 if (gs_explain[i].fc_explain == status) 387 return gs_explain[i].name; 388 389 return unknown_fc_explain; 390 } 391 392 static const struct { 393 enum ibmvfc_fc_type fc_type; 394 char *name; 395 } fc_type [] = { 396 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 397 { IBMVFC_PORT_REJECT, "port reject" }, 398 { IBMVFC_LS_REJECT, "ELS reject" }, 399 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 400 { IBMVFC_PORT_BUSY, "port busy" }, 401 { IBMVFC_BASIC_REJECT, "basic reject" }, 402 }; 403 404 static const char *unknown_fc_type = "unknown fc type"; 405 406 /** 407 * ibmvfc_get_fc_type - Return the FC Type description text 408 * @status: FC Type error status 409 * 410 * Returns: 411 * error string 412 **/ 413 static const char *ibmvfc_get_fc_type(u16 status) 414 { 415 int i; 416 417 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 418 if (fc_type[i].fc_type == status) 419 return fc_type[i].name; 420 421 return unknown_fc_type; 422 } 423 424 /** 425 * ibmvfc_set_tgt_action - Set the next init action for the target 426 * @tgt: ibmvfc target struct 427 * @action: action to perform 428 * 429 **/ 430 static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 431 enum ibmvfc_target_action action) 432 { 433 switch (tgt->action) { 434 case IBMVFC_TGT_ACTION_DEL_RPORT: 435 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) 436 tgt->action = action; 437 case IBMVFC_TGT_ACTION_DELETED_RPORT: 438 break; 439 default: 440 if (action == IBMVFC_TGT_ACTION_DEL_RPORT) 441 tgt->add_rport = 0; 442 tgt->action = action; 443 break; 444 } 445 } 446 447 /** 448 * ibmvfc_set_host_state - Set the state for the host 449 * @vhost: ibmvfc host struct 450 * @state: state to set host to 451 * 452 * Returns: 453 * 0 if state changed / non-zero if not changed 454 **/ 455 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 456 enum ibmvfc_host_state state) 457 { 458 int rc = 0; 459 460 switch (vhost->state) { 461 case IBMVFC_HOST_OFFLINE: 462 rc = -EINVAL; 463 break; 464 default: 465 vhost->state = state; 466 break; 467 } 468 469 return rc; 470 } 471 472 /** 473 * ibmvfc_set_host_action - Set the next init action for the host 474 * @vhost: ibmvfc host struct 475 * @action: action to perform 476 * 477 **/ 478 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 479 enum ibmvfc_host_action action) 480 { 481 switch (action) { 482 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 483 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 484 vhost->action = action; 485 break; 486 case IBMVFC_HOST_ACTION_LOGO_WAIT: 487 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 488 vhost->action = action; 489 break; 490 case IBMVFC_HOST_ACTION_INIT_WAIT: 491 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 492 vhost->action = action; 493 break; 494 case IBMVFC_HOST_ACTION_QUERY: 495 switch (vhost->action) { 496 case IBMVFC_HOST_ACTION_INIT_WAIT: 497 case IBMVFC_HOST_ACTION_NONE: 498 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 499 vhost->action = action; 500 break; 501 default: 502 break; 503 } 504 break; 505 case IBMVFC_HOST_ACTION_TGT_INIT: 506 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 507 vhost->action = action; 508 break; 509 case IBMVFC_HOST_ACTION_INIT: 510 case IBMVFC_HOST_ACTION_TGT_DEL: 511 switch (vhost->action) { 512 case IBMVFC_HOST_ACTION_RESET: 513 case IBMVFC_HOST_ACTION_REENABLE: 514 break; 515 default: 516 vhost->action = action; 517 break; 518 } 519 break; 520 case IBMVFC_HOST_ACTION_LOGO: 521 case IBMVFC_HOST_ACTION_QUERY_TGTS: 522 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 523 case IBMVFC_HOST_ACTION_NONE: 524 case IBMVFC_HOST_ACTION_RESET: 525 case IBMVFC_HOST_ACTION_REENABLE: 526 default: 527 vhost->action = action; 528 break; 529 } 530 } 531 532 /** 533 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 534 * @vhost: ibmvfc host struct 535 * 536 * Return value: 537 * nothing 538 **/ 539 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 540 { 541 if (vhost->action == IBMVFC_HOST_ACTION_NONE) { 542 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 543 scsi_block_requests(vhost->host); 544 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 545 } 546 } else 547 vhost->reinit = 1; 548 549 wake_up(&vhost->work_wait_q); 550 } 551 552 /** 553 * ibmvfc_link_down - Handle a link down event from the adapter 554 * @vhost: ibmvfc host struct 555 * @state: ibmvfc host state to enter 556 * 557 **/ 558 static void ibmvfc_link_down(struct ibmvfc_host *vhost, 559 enum ibmvfc_host_state state) 560 { 561 struct ibmvfc_target *tgt; 562 563 ENTER; 564 scsi_block_requests(vhost->host); 565 list_for_each_entry(tgt, &vhost->targets, queue) 566 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 567 ibmvfc_set_host_state(vhost, state); 568 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 569 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 570 wake_up(&vhost->work_wait_q); 571 LEAVE; 572 } 573 574 /** 575 * ibmvfc_init_host - Start host initialization 576 * @vhost: ibmvfc host struct 577 * 578 * Return value: 579 * nothing 580 **/ 581 static void ibmvfc_init_host(struct ibmvfc_host *vhost) 582 { 583 struct ibmvfc_target *tgt; 584 585 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 586 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 587 dev_err(vhost->dev, 588 "Host initialization retries exceeded. Taking adapter offline\n"); 589 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 590 return; 591 } 592 } 593 594 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 595 memset(vhost->async_crq.msgs, 0, PAGE_SIZE); 596 vhost->async_crq.cur = 0; 597 598 list_for_each_entry(tgt, &vhost->targets, queue) 599 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 600 scsi_block_requests(vhost->host); 601 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 602 vhost->job_step = ibmvfc_npiv_login; 603 wake_up(&vhost->work_wait_q); 604 } 605 } 606 607 /** 608 * ibmvfc_send_crq - Send a CRQ 609 * @vhost: ibmvfc host struct 610 * @word1: the first 64 bits of the data 611 * @word2: the second 64 bits of the data 612 * 613 * Return value: 614 * 0 on success / other on failure 615 **/ 616 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 617 { 618 struct vio_dev *vdev = to_vio_dev(vhost->dev); 619 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 620 } 621 622 /** 623 * ibmvfc_send_crq_init - Send a CRQ init 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(struct ibmvfc_host *vhost) 630 { 631 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 632 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 633 } 634 635 /** 636 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 637 * @vhost: ibmvfc host struct 638 * 639 * Return value: 640 * 0 on success / other on failure 641 **/ 642 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 643 { 644 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 645 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 646 } 647 648 /** 649 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 650 * @vhost: ibmvfc host struct 651 * 652 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 653 * the crq with the hypervisor. 654 **/ 655 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 656 { 657 long rc = 0; 658 struct vio_dev *vdev = to_vio_dev(vhost->dev); 659 struct ibmvfc_crq_queue *crq = &vhost->crq; 660 661 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 662 free_irq(vdev->irq, vhost); 663 tasklet_kill(&vhost->tasklet); 664 do { 665 if (rc) 666 msleep(100); 667 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 668 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 669 670 vhost->state = IBMVFC_NO_CRQ; 671 vhost->logged_in = 0; 672 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 673 free_page((unsigned long)crq->msgs); 674 } 675 676 /** 677 * ibmvfc_reenable_crq_queue - reenables the CRQ 678 * @vhost: ibmvfc host struct 679 * 680 * Return value: 681 * 0 on success / other on failure 682 **/ 683 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 684 { 685 int rc = 0; 686 struct vio_dev *vdev = to_vio_dev(vhost->dev); 687 688 /* Re-enable the CRQ */ 689 do { 690 if (rc) 691 msleep(100); 692 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 693 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 694 695 if (rc) 696 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 697 698 return rc; 699 } 700 701 /** 702 * ibmvfc_reset_crq - resets a crq after a failure 703 * @vhost: ibmvfc host struct 704 * 705 * Return value: 706 * 0 on success / other on failure 707 **/ 708 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 709 { 710 int rc = 0; 711 unsigned long flags; 712 struct vio_dev *vdev = to_vio_dev(vhost->dev); 713 struct ibmvfc_crq_queue *crq = &vhost->crq; 714 715 /* Close the CRQ */ 716 do { 717 if (rc) 718 msleep(100); 719 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 720 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 721 722 spin_lock_irqsave(vhost->host->host_lock, flags); 723 vhost->state = IBMVFC_NO_CRQ; 724 vhost->logged_in = 0; 725 726 /* Clean out the queue */ 727 memset(crq->msgs, 0, PAGE_SIZE); 728 crq->cur = 0; 729 730 /* And re-open it again */ 731 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 732 crq->msg_token, PAGE_SIZE); 733 734 if (rc == H_CLOSED) 735 /* Adapter is good, but other end is not ready */ 736 dev_warn(vhost->dev, "Partner adapter not ready\n"); 737 else if (rc != 0) 738 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 739 spin_unlock_irqrestore(vhost->host->host_lock, flags); 740 741 return rc; 742 } 743 744 /** 745 * ibmvfc_valid_event - Determines if event is valid. 746 * @pool: event_pool that contains the event 747 * @evt: ibmvfc event to be checked for validity 748 * 749 * Return value: 750 * 1 if event is valid / 0 if event is not valid 751 **/ 752 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 753 struct ibmvfc_event *evt) 754 { 755 int index = evt - pool->events; 756 if (index < 0 || index >= pool->size) /* outside of bounds */ 757 return 0; 758 if (evt != pool->events + index) /* unaligned */ 759 return 0; 760 return 1; 761 } 762 763 /** 764 * ibmvfc_free_event - Free the specified event 765 * @evt: ibmvfc_event to be freed 766 * 767 **/ 768 static void ibmvfc_free_event(struct ibmvfc_event *evt) 769 { 770 struct ibmvfc_host *vhost = evt->vhost; 771 struct ibmvfc_event_pool *pool = &vhost->pool; 772 773 BUG_ON(!ibmvfc_valid_event(pool, evt)); 774 BUG_ON(atomic_inc_return(&evt->free) != 1); 775 list_add_tail(&evt->queue, &vhost->free); 776 } 777 778 /** 779 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 780 * @evt: ibmvfc event struct 781 * 782 * This function does not setup any error status, that must be done 783 * before this function gets called. 784 **/ 785 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 786 { 787 struct scsi_cmnd *cmnd = evt->cmnd; 788 789 if (cmnd) { 790 scsi_dma_unmap(cmnd); 791 cmnd->scsi_done(cmnd); 792 } 793 794 if (evt->eh_comp) 795 complete(evt->eh_comp); 796 797 ibmvfc_free_event(evt); 798 } 799 800 /** 801 * ibmvfc_fail_request - Fail request with specified error code 802 * @evt: ibmvfc event struct 803 * @error_code: error code to fail request with 804 * 805 * Return value: 806 * none 807 **/ 808 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 809 { 810 if (evt->cmnd) { 811 evt->cmnd->result = (error_code << 16); 812 evt->done = ibmvfc_scsi_eh_done; 813 } else 814 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED); 815 816 list_del(&evt->queue); 817 del_timer(&evt->timer); 818 ibmvfc_trc_end(evt); 819 evt->done(evt); 820 } 821 822 /** 823 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 824 * @vhost: ibmvfc host struct 825 * @error_code: error code to fail requests with 826 * 827 * Return value: 828 * none 829 **/ 830 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 831 { 832 struct ibmvfc_event *evt, *pos; 833 834 ibmvfc_dbg(vhost, "Purging all requests\n"); 835 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 836 ibmvfc_fail_request(evt, error_code); 837 } 838 839 /** 840 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 841 * @vhost: struct ibmvfc host to reset 842 **/ 843 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 844 { 845 ibmvfc_purge_requests(vhost, DID_ERROR); 846 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 847 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 848 } 849 850 /** 851 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 852 * @vhost: struct ibmvfc host to reset 853 **/ 854 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 855 { 856 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 857 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 858 scsi_block_requests(vhost->host); 859 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 860 vhost->job_step = ibmvfc_npiv_logout; 861 wake_up(&vhost->work_wait_q); 862 } else 863 ibmvfc_hard_reset_host(vhost); 864 } 865 866 /** 867 * ibmvfc_reset_host - Reset the connection to the server 868 * @vhost: ibmvfc host struct 869 **/ 870 static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 871 { 872 unsigned long flags; 873 874 spin_lock_irqsave(vhost->host->host_lock, flags); 875 __ibmvfc_reset_host(vhost); 876 spin_unlock_irqrestore(vhost->host->host_lock, flags); 877 } 878 879 /** 880 * ibmvfc_retry_host_init - Retry host initialization if allowed 881 * @vhost: ibmvfc host struct 882 * 883 * Returns: 1 if init will be retried / 0 if not 884 * 885 **/ 886 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 887 { 888 int retry = 0; 889 890 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 891 vhost->delay_init = 1; 892 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 893 dev_err(vhost->dev, 894 "Host initialization retries exceeded. Taking adapter offline\n"); 895 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 896 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 897 __ibmvfc_reset_host(vhost); 898 else { 899 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 900 retry = 1; 901 } 902 } 903 904 wake_up(&vhost->work_wait_q); 905 return retry; 906 } 907 908 /** 909 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 910 * @starget: scsi target struct 911 * 912 * Return value: 913 * ibmvfc_target struct / NULL if not found 914 **/ 915 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 916 { 917 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 918 struct ibmvfc_host *vhost = shost_priv(shost); 919 struct ibmvfc_target *tgt; 920 921 list_for_each_entry(tgt, &vhost->targets, queue) 922 if (tgt->target_id == starget->id) { 923 kref_get(&tgt->kref); 924 return tgt; 925 } 926 return NULL; 927 } 928 929 /** 930 * ibmvfc_get_target - Find the specified scsi_target 931 * @starget: scsi target struct 932 * 933 * Return value: 934 * ibmvfc_target struct / NULL if not found 935 **/ 936 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 937 { 938 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 939 struct ibmvfc_target *tgt; 940 unsigned long flags; 941 942 spin_lock_irqsave(shost->host_lock, flags); 943 tgt = __ibmvfc_get_target(starget); 944 spin_unlock_irqrestore(shost->host_lock, flags); 945 return tgt; 946 } 947 948 /** 949 * ibmvfc_get_host_speed - Get host port speed 950 * @shost: scsi host struct 951 * 952 * Return value: 953 * none 954 **/ 955 static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 956 { 957 struct ibmvfc_host *vhost = shost_priv(shost); 958 unsigned long flags; 959 960 spin_lock_irqsave(shost->host_lock, flags); 961 if (vhost->state == IBMVFC_ACTIVE) { 962 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) { 963 case 1: 964 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 965 break; 966 case 2: 967 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 968 break; 969 case 4: 970 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 971 break; 972 case 8: 973 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 974 break; 975 case 10: 976 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 977 break; 978 case 16: 979 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 980 break; 981 default: 982 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 983 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100); 984 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 985 break; 986 } 987 } else 988 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 989 spin_unlock_irqrestore(shost->host_lock, flags); 990 } 991 992 /** 993 * ibmvfc_get_host_port_state - Get host port state 994 * @shost: scsi host struct 995 * 996 * Return value: 997 * none 998 **/ 999 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 1000 { 1001 struct ibmvfc_host *vhost = shost_priv(shost); 1002 unsigned long flags; 1003 1004 spin_lock_irqsave(shost->host_lock, flags); 1005 switch (vhost->state) { 1006 case IBMVFC_INITIALIZING: 1007 case IBMVFC_ACTIVE: 1008 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 1009 break; 1010 case IBMVFC_LINK_DOWN: 1011 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 1012 break; 1013 case IBMVFC_LINK_DEAD: 1014 case IBMVFC_HOST_OFFLINE: 1015 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1016 break; 1017 case IBMVFC_HALTED: 1018 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1019 break; 1020 case IBMVFC_NO_CRQ: 1021 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1022 break; 1023 default: 1024 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1025 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1026 break; 1027 } 1028 spin_unlock_irqrestore(shost->host_lock, flags); 1029 } 1030 1031 /** 1032 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1033 * @rport: rport struct 1034 * @timeout: timeout value 1035 * 1036 * Return value: 1037 * none 1038 **/ 1039 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1040 { 1041 if (timeout) 1042 rport->dev_loss_tmo = timeout; 1043 else 1044 rport->dev_loss_tmo = 1; 1045 } 1046 1047 /** 1048 * ibmvfc_release_tgt - Free memory allocated for a target 1049 * @kref: kref struct 1050 * 1051 **/ 1052 static void ibmvfc_release_tgt(struct kref *kref) 1053 { 1054 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1055 kfree(tgt); 1056 } 1057 1058 /** 1059 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1060 * @starget: scsi target struct 1061 * 1062 * Return value: 1063 * none 1064 **/ 1065 static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1066 { 1067 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1068 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1069 if (tgt) 1070 kref_put(&tgt->kref, ibmvfc_release_tgt); 1071 } 1072 1073 /** 1074 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1075 * @starget: scsi target struct 1076 * 1077 * Return value: 1078 * none 1079 **/ 1080 static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1081 { 1082 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1083 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1084 if (tgt) 1085 kref_put(&tgt->kref, ibmvfc_release_tgt); 1086 } 1087 1088 /** 1089 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1090 * @starget: scsi target struct 1091 * 1092 * Return value: 1093 * none 1094 **/ 1095 static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1096 { 1097 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1098 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1099 if (tgt) 1100 kref_put(&tgt->kref, ibmvfc_release_tgt); 1101 } 1102 1103 /** 1104 * ibmvfc_wait_while_resetting - Wait while the host resets 1105 * @vhost: ibmvfc host struct 1106 * 1107 * Return value: 1108 * 0 on success / other on failure 1109 **/ 1110 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1111 { 1112 long timeout = wait_event_timeout(vhost->init_wait_q, 1113 ((vhost->state == IBMVFC_ACTIVE || 1114 vhost->state == IBMVFC_HOST_OFFLINE || 1115 vhost->state == IBMVFC_LINK_DEAD) && 1116 vhost->action == IBMVFC_HOST_ACTION_NONE), 1117 (init_timeout * HZ)); 1118 1119 return timeout ? 0 : -EIO; 1120 } 1121 1122 /** 1123 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1124 * @shost: scsi host struct 1125 * 1126 * Return value: 1127 * 0 on success / other on failure 1128 **/ 1129 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1130 { 1131 struct ibmvfc_host *vhost = shost_priv(shost); 1132 1133 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1134 ibmvfc_reset_host(vhost); 1135 return ibmvfc_wait_while_resetting(vhost); 1136 } 1137 1138 /** 1139 * ibmvfc_gather_partition_info - Gather info about the LPAR 1140 * 1141 * Return value: 1142 * none 1143 **/ 1144 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1145 { 1146 struct device_node *rootdn; 1147 const char *name; 1148 const unsigned int *num; 1149 1150 rootdn = of_find_node_by_path("/"); 1151 if (!rootdn) 1152 return; 1153 1154 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1155 if (name) 1156 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1157 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1158 if (num) 1159 vhost->partition_number = *num; 1160 of_node_put(rootdn); 1161 } 1162 1163 /** 1164 * ibmvfc_set_login_info - Setup info for NPIV login 1165 * @vhost: ibmvfc host struct 1166 * 1167 * Return value: 1168 * none 1169 **/ 1170 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1171 { 1172 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1173 struct device_node *of_node = vhost->dev->of_node; 1174 const char *location; 1175 1176 memset(login_info, 0, sizeof(*login_info)); 1177 1178 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX); 1179 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); 1180 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); 1181 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); 1182 login_info->partition_num = cpu_to_be32(vhost->partition_number); 1183 login_info->vfc_frame_version = cpu_to_be32(1); 1184 login_info->fcp_version = cpu_to_be16(3); 1185 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); 1186 if (vhost->client_migrated) 1187 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); 1188 1189 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ); 1190 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE); 1191 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); 1192 login_info->async.len = cpu_to_be32(vhost->async_crq.size * sizeof(*vhost->async_crq.msgs)); 1193 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1194 strncpy(login_info->device_name, 1195 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1196 1197 location = of_get_property(of_node, "ibm,loc-code", NULL); 1198 location = location ? location : dev_name(vhost->dev); 1199 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1200 } 1201 1202 /** 1203 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1204 * @vhost: ibmvfc host who owns the event pool 1205 * 1206 * Returns zero on success. 1207 **/ 1208 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1209 { 1210 int i; 1211 struct ibmvfc_event_pool *pool = &vhost->pool; 1212 1213 ENTER; 1214 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1215 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1216 if (!pool->events) 1217 return -ENOMEM; 1218 1219 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1220 pool->size * sizeof(*pool->iu_storage), 1221 &pool->iu_token, 0); 1222 1223 if (!pool->iu_storage) { 1224 kfree(pool->events); 1225 return -ENOMEM; 1226 } 1227 1228 for (i = 0; i < pool->size; ++i) { 1229 struct ibmvfc_event *evt = &pool->events[i]; 1230 atomic_set(&evt->free, 1); 1231 evt->crq.valid = 0x80; 1232 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i)); 1233 evt->xfer_iu = pool->iu_storage + i; 1234 evt->vhost = vhost; 1235 evt->ext_list = NULL; 1236 list_add_tail(&evt->queue, &vhost->free); 1237 } 1238 1239 LEAVE; 1240 return 0; 1241 } 1242 1243 /** 1244 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1245 * @vhost: ibmvfc host who owns the event pool 1246 * 1247 **/ 1248 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1249 { 1250 int i; 1251 struct ibmvfc_event_pool *pool = &vhost->pool; 1252 1253 ENTER; 1254 for (i = 0; i < pool->size; ++i) { 1255 list_del(&pool->events[i].queue); 1256 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1257 if (pool->events[i].ext_list) 1258 dma_pool_free(vhost->sg_pool, 1259 pool->events[i].ext_list, 1260 pool->events[i].ext_list_token); 1261 } 1262 1263 kfree(pool->events); 1264 dma_free_coherent(vhost->dev, 1265 pool->size * sizeof(*pool->iu_storage), 1266 pool->iu_storage, pool->iu_token); 1267 LEAVE; 1268 } 1269 1270 /** 1271 * ibmvfc_get_event - Gets the next free event in pool 1272 * @vhost: ibmvfc host struct 1273 * 1274 * Returns a free event from the pool. 1275 **/ 1276 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1277 { 1278 struct ibmvfc_event *evt; 1279 1280 BUG_ON(list_empty(&vhost->free)); 1281 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1282 atomic_set(&evt->free, 0); 1283 list_del(&evt->queue); 1284 return evt; 1285 } 1286 1287 /** 1288 * ibmvfc_init_event - Initialize fields in an event struct that are always 1289 * required. 1290 * @evt: The event 1291 * @done: Routine to call when the event is responded to 1292 * @format: SRP or MAD format 1293 **/ 1294 static void ibmvfc_init_event(struct ibmvfc_event *evt, 1295 void (*done) (struct ibmvfc_event *), u8 format) 1296 { 1297 evt->cmnd = NULL; 1298 evt->sync_iu = NULL; 1299 evt->crq.format = format; 1300 evt->done = done; 1301 evt->eh_comp = NULL; 1302 } 1303 1304 /** 1305 * ibmvfc_map_sg_list - Initialize scatterlist 1306 * @scmd: scsi command struct 1307 * @nseg: number of scatterlist segments 1308 * @md: memory descriptor list to initialize 1309 **/ 1310 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1311 struct srp_direct_buf *md) 1312 { 1313 int i; 1314 struct scatterlist *sg; 1315 1316 scsi_for_each_sg(scmd, sg, nseg, i) { 1317 md[i].va = cpu_to_be64(sg_dma_address(sg)); 1318 md[i].len = cpu_to_be32(sg_dma_len(sg)); 1319 md[i].key = 0; 1320 } 1321 } 1322 1323 /** 1324 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1325 * @scmd: Scsi_Cmnd with the scatterlist 1326 * @evt: ibmvfc event struct 1327 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1328 * @dev: device for which to map dma memory 1329 * 1330 * Returns: 1331 * 0 on success / non-zero on failure 1332 **/ 1333 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1334 struct ibmvfc_event *evt, 1335 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1336 { 1337 1338 int sg_mapped; 1339 struct srp_direct_buf *data = &vfc_cmd->ioba; 1340 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1341 1342 if (cls3_error) 1343 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR); 1344 1345 sg_mapped = scsi_dma_map(scmd); 1346 if (!sg_mapped) { 1347 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC); 1348 return 0; 1349 } else if (unlikely(sg_mapped < 0)) { 1350 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1351 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1352 return sg_mapped; 1353 } 1354 1355 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1356 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE); 1357 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1358 } else { 1359 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ); 1360 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1361 } 1362 1363 if (sg_mapped == 1) { 1364 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1365 return 0; 1366 } 1367 1368 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST); 1369 1370 if (!evt->ext_list) { 1371 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1372 &evt->ext_list_token); 1373 1374 if (!evt->ext_list) { 1375 scsi_dma_unmap(scmd); 1376 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1377 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1378 return -ENOMEM; 1379 } 1380 } 1381 1382 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1383 1384 data->va = cpu_to_be64(evt->ext_list_token); 1385 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf)); 1386 data->key = 0; 1387 return 0; 1388 } 1389 1390 /** 1391 * ibmvfc_timeout - Internal command timeout handler 1392 * @evt: struct ibmvfc_event that timed out 1393 * 1394 * Called when an internally generated command times out 1395 **/ 1396 static void ibmvfc_timeout(struct timer_list *t) 1397 { 1398 struct ibmvfc_event *evt = from_timer(evt, t, timer); 1399 struct ibmvfc_host *vhost = evt->vhost; 1400 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1401 ibmvfc_reset_host(vhost); 1402 } 1403 1404 /** 1405 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1406 * @evt: event to be sent 1407 * @vhost: ibmvfc host struct 1408 * @timeout: timeout in seconds - 0 means do not time command 1409 * 1410 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1411 **/ 1412 static int ibmvfc_send_event(struct ibmvfc_event *evt, 1413 struct ibmvfc_host *vhost, unsigned long timeout) 1414 { 1415 __be64 *crq_as_u64 = (__be64 *) &evt->crq; 1416 int rc; 1417 1418 /* Copy the IU into the transfer area */ 1419 *evt->xfer_iu = evt->iu; 1420 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1421 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); 1422 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1423 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); 1424 else 1425 BUG(); 1426 1427 list_add_tail(&evt->queue, &vhost->sent); 1428 timer_setup(&evt->timer, ibmvfc_timeout, 0); 1429 1430 if (timeout) { 1431 evt->timer.expires = jiffies + (timeout * HZ); 1432 add_timer(&evt->timer); 1433 } 1434 1435 mb(); 1436 1437 if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), 1438 be64_to_cpu(crq_as_u64[1])))) { 1439 list_del(&evt->queue); 1440 del_timer(&evt->timer); 1441 1442 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1443 * Firmware will send a CRQ with a transport event (0xFF) to 1444 * tell this client what has happened to the transport. This 1445 * will be handled in ibmvfc_handle_crq() 1446 */ 1447 if (rc == H_CLOSED) { 1448 if (printk_ratelimit()) 1449 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1450 if (evt->cmnd) 1451 scsi_dma_unmap(evt->cmnd); 1452 ibmvfc_free_event(evt); 1453 return SCSI_MLQUEUE_HOST_BUSY; 1454 } 1455 1456 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1457 if (evt->cmnd) { 1458 evt->cmnd->result = DID_ERROR << 16; 1459 evt->done = ibmvfc_scsi_eh_done; 1460 } else 1461 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); 1462 1463 evt->done(evt); 1464 } else 1465 ibmvfc_trc_start(evt); 1466 1467 return 0; 1468 } 1469 1470 /** 1471 * ibmvfc_log_error - Log an error for the failed command if appropriate 1472 * @evt: ibmvfc event to log 1473 * 1474 **/ 1475 static void ibmvfc_log_error(struct ibmvfc_event *evt) 1476 { 1477 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1478 struct ibmvfc_host *vhost = evt->vhost; 1479 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1480 struct scsi_cmnd *cmnd = evt->cmnd; 1481 const char *err = unknown_error; 1482 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 1483 int logerr = 0; 1484 int rsp_code = 0; 1485 1486 if (index >= 0) { 1487 logerr = cmd_status[index].log; 1488 err = cmd_status[index].name; 1489 } 1490 1491 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1492 return; 1493 1494 if (rsp->flags & FCP_RSP_LEN_VALID) 1495 rsp_code = rsp->data.info.rsp_code; 1496 1497 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1498 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1499 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1500 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1501 } 1502 1503 /** 1504 * ibmvfc_relogin - Log back into the specified device 1505 * @sdev: scsi device struct 1506 * 1507 **/ 1508 static void ibmvfc_relogin(struct scsi_device *sdev) 1509 { 1510 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1511 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1512 struct ibmvfc_target *tgt; 1513 1514 list_for_each_entry(tgt, &vhost->targets, queue) { 1515 if (rport == tgt->rport) { 1516 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 1517 break; 1518 } 1519 } 1520 1521 ibmvfc_reinit_host(vhost); 1522 } 1523 1524 /** 1525 * ibmvfc_scsi_done - Handle responses from commands 1526 * @evt: ibmvfc event to be handled 1527 * 1528 * Used as a callback when sending scsi cmds. 1529 **/ 1530 static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1531 { 1532 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1533 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1534 struct scsi_cmnd *cmnd = evt->cmnd; 1535 u32 rsp_len = 0; 1536 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); 1537 1538 if (cmnd) { 1539 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) 1540 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); 1541 else if (rsp->flags & FCP_RESID_UNDER) 1542 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); 1543 else 1544 scsi_set_resid(cmnd, 0); 1545 1546 if (vfc_cmd->status) { 1547 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1548 1549 if (rsp->flags & FCP_RSP_LEN_VALID) 1550 rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 1551 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1552 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1553 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1554 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1555 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && 1556 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) 1557 ibmvfc_relogin(cmnd->device); 1558 1559 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1560 cmnd->result = (DID_ERROR << 16); 1561 1562 ibmvfc_log_error(evt); 1563 } 1564 1565 if (!cmnd->result && 1566 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1567 cmnd->result = (DID_ERROR << 16); 1568 1569 scsi_dma_unmap(cmnd); 1570 cmnd->scsi_done(cmnd); 1571 } 1572 1573 if (evt->eh_comp) 1574 complete(evt->eh_comp); 1575 1576 ibmvfc_free_event(evt); 1577 } 1578 1579 /** 1580 * ibmvfc_host_chkready - Check if the host can accept commands 1581 * @vhost: struct ibmvfc host 1582 * 1583 * Returns: 1584 * 1 if host can accept command / 0 if not 1585 **/ 1586 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1587 { 1588 int result = 0; 1589 1590 switch (vhost->state) { 1591 case IBMVFC_LINK_DEAD: 1592 case IBMVFC_HOST_OFFLINE: 1593 result = DID_NO_CONNECT << 16; 1594 break; 1595 case IBMVFC_NO_CRQ: 1596 case IBMVFC_INITIALIZING: 1597 case IBMVFC_HALTED: 1598 case IBMVFC_LINK_DOWN: 1599 result = DID_REQUEUE << 16; 1600 break; 1601 case IBMVFC_ACTIVE: 1602 result = 0; 1603 break; 1604 } 1605 1606 return result; 1607 } 1608 1609 /** 1610 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1611 * @cmnd: struct scsi_cmnd to be executed 1612 * @done: Callback function to be called when cmnd is completed 1613 * 1614 * Returns: 1615 * 0 on success / other on failure 1616 **/ 1617 static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd, 1618 void (*done) (struct scsi_cmnd *)) 1619 { 1620 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1621 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1622 struct ibmvfc_cmd *vfc_cmd; 1623 struct ibmvfc_event *evt; 1624 int rc; 1625 1626 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1627 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1628 cmnd->result = rc; 1629 done(cmnd); 1630 return 0; 1631 } 1632 1633 cmnd->result = (DID_OK << 16); 1634 evt = ibmvfc_get_event(vhost); 1635 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1636 evt->cmnd = cmnd; 1637 cmnd->scsi_done = done; 1638 vfc_cmd = &evt->iu.cmd; 1639 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1640 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 1641 vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp)); 1642 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1643 vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu)); 1644 vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp)); 1645 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata); 1646 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); 1647 vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); 1648 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1649 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1650 1651 if (cmnd->flags & SCMD_TAGGED) { 1652 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag); 1653 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1654 } 1655 1656 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1657 return ibmvfc_send_event(evt, vhost, 0); 1658 1659 ibmvfc_free_event(evt); 1660 if (rc == -ENOMEM) 1661 return SCSI_MLQUEUE_HOST_BUSY; 1662 1663 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1664 scmd_printk(KERN_ERR, cmnd, 1665 "Failed to map DMA buffer for command. rc=%d\n", rc); 1666 1667 cmnd->result = DID_ERROR << 16; 1668 done(cmnd); 1669 return 0; 1670 } 1671 1672 static DEF_SCSI_QCMD(ibmvfc_queuecommand) 1673 1674 /** 1675 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1676 * @evt: ibmvfc event struct 1677 * 1678 **/ 1679 static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1680 { 1681 /* copy the response back */ 1682 if (evt->sync_iu) 1683 *evt->sync_iu = *evt->xfer_iu; 1684 1685 complete(&evt->comp); 1686 } 1687 1688 /** 1689 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 1690 * @evt: struct ibmvfc_event 1691 * 1692 **/ 1693 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 1694 { 1695 struct ibmvfc_host *vhost = evt->vhost; 1696 1697 ibmvfc_free_event(evt); 1698 vhost->aborting_passthru = 0; 1699 dev_info(vhost->dev, "Passthru command cancelled\n"); 1700 } 1701 1702 /** 1703 * ibmvfc_bsg_timeout - Handle a BSG timeout 1704 * @job: struct bsg_job that timed out 1705 * 1706 * Returns: 1707 * 0 on success / other on failure 1708 **/ 1709 static int ibmvfc_bsg_timeout(struct bsg_job *job) 1710 { 1711 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 1712 unsigned long port_id = (unsigned long)job->dd_data; 1713 struct ibmvfc_event *evt; 1714 struct ibmvfc_tmf *tmf; 1715 unsigned long flags; 1716 int rc; 1717 1718 ENTER; 1719 spin_lock_irqsave(vhost->host->host_lock, flags); 1720 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 1721 __ibmvfc_reset_host(vhost); 1722 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1723 return 0; 1724 } 1725 1726 vhost->aborting_passthru = 1; 1727 evt = ibmvfc_get_event(vhost); 1728 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 1729 1730 tmf = &evt->iu.tmf; 1731 memset(tmf, 0, sizeof(*tmf)); 1732 tmf->common.version = cpu_to_be32(1); 1733 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 1734 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 1735 tmf->scsi_id = cpu_to_be64(port_id); 1736 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 1737 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); 1738 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1739 1740 if (rc != 0) { 1741 vhost->aborting_passthru = 0; 1742 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 1743 rc = -EIO; 1744 } else 1745 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 1746 port_id); 1747 1748 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1749 1750 LEAVE; 1751 return rc; 1752 } 1753 1754 /** 1755 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 1756 * @vhost: struct ibmvfc_host to send command 1757 * @port_id: port ID to send command 1758 * 1759 * Returns: 1760 * 0 on success / other on failure 1761 **/ 1762 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 1763 { 1764 struct ibmvfc_port_login *plogi; 1765 struct ibmvfc_target *tgt; 1766 struct ibmvfc_event *evt; 1767 union ibmvfc_iu rsp_iu; 1768 unsigned long flags; 1769 int rc = 0, issue_login = 1; 1770 1771 ENTER; 1772 spin_lock_irqsave(vhost->host->host_lock, flags); 1773 list_for_each_entry(tgt, &vhost->targets, queue) { 1774 if (tgt->scsi_id == port_id) { 1775 issue_login = 0; 1776 break; 1777 } 1778 } 1779 1780 if (!issue_login) 1781 goto unlock_out; 1782 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 1783 goto unlock_out; 1784 1785 evt = ibmvfc_get_event(vhost); 1786 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1787 plogi = &evt->iu.plogi; 1788 memset(plogi, 0, sizeof(*plogi)); 1789 plogi->common.version = cpu_to_be32(1); 1790 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 1791 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 1792 plogi->scsi_id = cpu_to_be64(port_id); 1793 evt->sync_iu = &rsp_iu; 1794 init_completion(&evt->comp); 1795 1796 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1797 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1798 1799 if (rc) 1800 return -EIO; 1801 1802 wait_for_completion(&evt->comp); 1803 1804 if (rsp_iu.plogi.common.status) 1805 rc = -EIO; 1806 1807 spin_lock_irqsave(vhost->host->host_lock, flags); 1808 ibmvfc_free_event(evt); 1809 unlock_out: 1810 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1811 LEAVE; 1812 return rc; 1813 } 1814 1815 /** 1816 * ibmvfc_bsg_request - Handle a BSG request 1817 * @job: struct bsg_job to be executed 1818 * 1819 * Returns: 1820 * 0 on success / other on failure 1821 **/ 1822 static int ibmvfc_bsg_request(struct bsg_job *job) 1823 { 1824 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 1825 struct fc_rport *rport = fc_bsg_to_rport(job); 1826 struct ibmvfc_passthru_mad *mad; 1827 struct ibmvfc_event *evt; 1828 union ibmvfc_iu rsp_iu; 1829 unsigned long flags, port_id = -1; 1830 struct fc_bsg_request *bsg_request = job->request; 1831 struct fc_bsg_reply *bsg_reply = job->reply; 1832 unsigned int code = bsg_request->msgcode; 1833 int rc = 0, req_seg, rsp_seg, issue_login = 0; 1834 u32 fc_flags, rsp_len; 1835 1836 ENTER; 1837 bsg_reply->reply_payload_rcv_len = 0; 1838 if (rport) 1839 port_id = rport->port_id; 1840 1841 switch (code) { 1842 case FC_BSG_HST_ELS_NOLOGIN: 1843 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) | 1844 (bsg_request->rqst_data.h_els.port_id[1] << 8) | 1845 bsg_request->rqst_data.h_els.port_id[2]; 1846 case FC_BSG_RPT_ELS: 1847 fc_flags = IBMVFC_FC_ELS; 1848 break; 1849 case FC_BSG_HST_CT: 1850 issue_login = 1; 1851 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) | 1852 (bsg_request->rqst_data.h_ct.port_id[1] << 8) | 1853 bsg_request->rqst_data.h_ct.port_id[2]; 1854 case FC_BSG_RPT_CT: 1855 fc_flags = IBMVFC_FC_CT_IU; 1856 break; 1857 default: 1858 return -ENOTSUPP; 1859 } 1860 1861 if (port_id == -1) 1862 return -EINVAL; 1863 if (!mutex_trylock(&vhost->passthru_mutex)) 1864 return -EBUSY; 1865 1866 job->dd_data = (void *)port_id; 1867 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 1868 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1869 1870 if (!req_seg) { 1871 mutex_unlock(&vhost->passthru_mutex); 1872 return -ENOMEM; 1873 } 1874 1875 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 1876 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1877 1878 if (!rsp_seg) { 1879 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1880 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1881 mutex_unlock(&vhost->passthru_mutex); 1882 return -ENOMEM; 1883 } 1884 1885 if (req_seg > 1 || rsp_seg > 1) { 1886 rc = -EINVAL; 1887 goto out; 1888 } 1889 1890 if (issue_login) 1891 rc = ibmvfc_bsg_plogi(vhost, port_id); 1892 1893 spin_lock_irqsave(vhost->host->host_lock, flags); 1894 1895 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 1896 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1897 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1898 goto out; 1899 } 1900 1901 evt = ibmvfc_get_event(vhost); 1902 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1903 mad = &evt->iu.passthru; 1904 1905 memset(mad, 0, sizeof(*mad)); 1906 mad->common.version = cpu_to_be32(1); 1907 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 1908 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 1909 1910 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + 1911 offsetof(struct ibmvfc_passthru_mad, iu)); 1912 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 1913 1914 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); 1915 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); 1916 mad->iu.flags = cpu_to_be32(fc_flags); 1917 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 1918 1919 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); 1920 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); 1921 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); 1922 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); 1923 mad->iu.scsi_id = cpu_to_be64(port_id); 1924 mad->iu.tag = cpu_to_be64((u64)evt); 1925 rsp_len = be32_to_cpu(mad->iu.rsp.len); 1926 1927 evt->sync_iu = &rsp_iu; 1928 init_completion(&evt->comp); 1929 rc = ibmvfc_send_event(evt, vhost, 0); 1930 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1931 1932 if (rc) { 1933 rc = -EIO; 1934 goto out; 1935 } 1936 1937 wait_for_completion(&evt->comp); 1938 1939 if (rsp_iu.passthru.common.status) 1940 rc = -EIO; 1941 else 1942 bsg_reply->reply_payload_rcv_len = rsp_len; 1943 1944 spin_lock_irqsave(vhost->host->host_lock, flags); 1945 ibmvfc_free_event(evt); 1946 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1947 bsg_reply->result = rc; 1948 bsg_job_done(job, bsg_reply->result, 1949 bsg_reply->reply_payload_rcv_len); 1950 rc = 0; 1951 out: 1952 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1953 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1954 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 1955 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1956 mutex_unlock(&vhost->passthru_mutex); 1957 LEAVE; 1958 return rc; 1959 } 1960 1961 /** 1962 * ibmvfc_reset_device - Reset the device with the specified reset type 1963 * @sdev: scsi device to reset 1964 * @type: reset type 1965 * @desc: reset type description for log messages 1966 * 1967 * Returns: 1968 * 0 on success / other on failure 1969 **/ 1970 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1971 { 1972 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1973 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1974 struct ibmvfc_cmd *tmf; 1975 struct ibmvfc_event *evt = NULL; 1976 union ibmvfc_iu rsp_iu; 1977 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1978 int rsp_rc = -EBUSY; 1979 unsigned long flags; 1980 int rsp_code = 0; 1981 1982 spin_lock_irqsave(vhost->host->host_lock, flags); 1983 if (vhost->state == IBMVFC_ACTIVE) { 1984 evt = ibmvfc_get_event(vhost); 1985 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1986 1987 tmf = &evt->iu.cmd; 1988 memset(tmf, 0, sizeof(*tmf)); 1989 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 1990 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); 1991 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1992 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); 1993 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); 1994 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 1995 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); 1996 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1997 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 1998 tmf->iu.tmf_flags = type; 1999 evt->sync_iu = &rsp_iu; 2000 2001 init_completion(&evt->comp); 2002 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2003 } 2004 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2005 2006 if (rsp_rc != 0) { 2007 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 2008 desc, rsp_rc); 2009 return -EIO; 2010 } 2011 2012 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2013 wait_for_completion(&evt->comp); 2014 2015 if (rsp_iu.cmd.status) 2016 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2017 2018 if (rsp_code) { 2019 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2020 rsp_code = fc_rsp->data.info.rsp_code; 2021 2022 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2023 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, 2024 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2025 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2026 fc_rsp->scsi_status); 2027 rsp_rc = -EIO; 2028 } else 2029 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2030 2031 spin_lock_irqsave(vhost->host->host_lock, flags); 2032 ibmvfc_free_event(evt); 2033 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2034 return rsp_rc; 2035 } 2036 2037 /** 2038 * ibmvfc_match_rport - Match function for specified remote port 2039 * @evt: ibmvfc event struct 2040 * @device: device to match (rport) 2041 * 2042 * Returns: 2043 * 1 if event matches rport / 0 if event does not match rport 2044 **/ 2045 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2046 { 2047 struct fc_rport *cmd_rport; 2048 2049 if (evt->cmnd) { 2050 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2051 if (cmd_rport == rport) 2052 return 1; 2053 } 2054 return 0; 2055 } 2056 2057 /** 2058 * ibmvfc_match_target - Match function for specified target 2059 * @evt: ibmvfc event struct 2060 * @device: device to match (starget) 2061 * 2062 * Returns: 2063 * 1 if event matches starget / 0 if event does not match starget 2064 **/ 2065 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2066 { 2067 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2068 return 1; 2069 return 0; 2070 } 2071 2072 /** 2073 * ibmvfc_match_lun - Match function for specified LUN 2074 * @evt: ibmvfc event struct 2075 * @device: device to match (sdev) 2076 * 2077 * Returns: 2078 * 1 if event matches sdev / 0 if event does not match sdev 2079 **/ 2080 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2081 { 2082 if (evt->cmnd && evt->cmnd->device == device) 2083 return 1; 2084 return 0; 2085 } 2086 2087 /** 2088 * ibmvfc_wait_for_ops - Wait for ops to complete 2089 * @vhost: ibmvfc host struct 2090 * @device: device to match (starget or sdev) 2091 * @match: match function 2092 * 2093 * Returns: 2094 * SUCCESS / FAILED 2095 **/ 2096 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2097 int (*match) (struct ibmvfc_event *, void *)) 2098 { 2099 struct ibmvfc_event *evt; 2100 DECLARE_COMPLETION_ONSTACK(comp); 2101 int wait; 2102 unsigned long flags; 2103 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2104 2105 ENTER; 2106 do { 2107 wait = 0; 2108 spin_lock_irqsave(vhost->host->host_lock, flags); 2109 list_for_each_entry(evt, &vhost->sent, queue) { 2110 if (match(evt, device)) { 2111 evt->eh_comp = ∁ 2112 wait++; 2113 } 2114 } 2115 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2116 2117 if (wait) { 2118 timeout = wait_for_completion_timeout(&comp, timeout); 2119 2120 if (!timeout) { 2121 wait = 0; 2122 spin_lock_irqsave(vhost->host->host_lock, flags); 2123 list_for_each_entry(evt, &vhost->sent, queue) { 2124 if (match(evt, device)) { 2125 evt->eh_comp = NULL; 2126 wait++; 2127 } 2128 } 2129 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2130 if (wait) 2131 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2132 LEAVE; 2133 return wait ? FAILED : SUCCESS; 2134 } 2135 } 2136 } while (wait); 2137 2138 LEAVE; 2139 return SUCCESS; 2140 } 2141 2142 /** 2143 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2144 * @sdev: scsi device to cancel commands 2145 * @type: type of error recovery being performed 2146 * 2147 * This sends a cancel to the VIOS for the specified device. This does 2148 * NOT send any abort to the actual device. That must be done separately. 2149 * 2150 * Returns: 2151 * 0 on success / other on failure 2152 **/ 2153 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2154 { 2155 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2156 struct scsi_target *starget = scsi_target(sdev); 2157 struct fc_rport *rport = starget_to_rport(starget); 2158 struct ibmvfc_tmf *tmf; 2159 struct ibmvfc_event *evt, *found_evt; 2160 union ibmvfc_iu rsp; 2161 int rsp_rc = -EBUSY; 2162 unsigned long flags; 2163 u16 status; 2164 2165 ENTER; 2166 spin_lock_irqsave(vhost->host->host_lock, flags); 2167 found_evt = NULL; 2168 list_for_each_entry(evt, &vhost->sent, queue) { 2169 if (evt->cmnd && evt->cmnd->device == sdev) { 2170 found_evt = evt; 2171 break; 2172 } 2173 } 2174 2175 if (!found_evt) { 2176 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2177 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2178 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2179 return 0; 2180 } 2181 2182 if (vhost->logged_in) { 2183 evt = ibmvfc_get_event(vhost); 2184 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2185 2186 tmf = &evt->iu.tmf; 2187 memset(tmf, 0, sizeof(*tmf)); 2188 tmf->common.version = cpu_to_be32(1); 2189 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2190 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2191 tmf->scsi_id = cpu_to_be64(rport->port_id); 2192 int_to_scsilun(sdev->lun, &tmf->lun); 2193 if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS)) 2194 type &= ~IBMVFC_TMF_SUPPRESS_ABTS; 2195 if (vhost->state == IBMVFC_ACTIVE) 2196 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); 2197 else 2198 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); 2199 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2200 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); 2201 2202 evt->sync_iu = &rsp; 2203 init_completion(&evt->comp); 2204 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2205 } 2206 2207 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2208 2209 if (rsp_rc != 0) { 2210 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2211 /* If failure is received, the host adapter is most likely going 2212 through reset, return success so the caller will wait for the command 2213 being cancelled to get returned */ 2214 return 0; 2215 } 2216 2217 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2218 2219 wait_for_completion(&evt->comp); 2220 status = be16_to_cpu(rsp.mad_common.status); 2221 spin_lock_irqsave(vhost->host->host_lock, flags); 2222 ibmvfc_free_event(evt); 2223 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2224 2225 if (status != IBMVFC_MAD_SUCCESS) { 2226 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2227 switch (status) { 2228 case IBMVFC_MAD_DRIVER_FAILED: 2229 case IBMVFC_MAD_CRQ_ERROR: 2230 /* Host adapter most likely going through reset, return success to 2231 the caller will wait for the command being cancelled to get returned */ 2232 return 0; 2233 default: 2234 return -EIO; 2235 }; 2236 } 2237 2238 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2239 return 0; 2240 } 2241 2242 /** 2243 * ibmvfc_match_key - Match function for specified cancel key 2244 * @evt: ibmvfc event struct 2245 * @key: cancel key to match 2246 * 2247 * Returns: 2248 * 1 if event matches key / 0 if event does not match key 2249 **/ 2250 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2251 { 2252 unsigned long cancel_key = (unsigned long)key; 2253 2254 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2255 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) 2256 return 1; 2257 return 0; 2258 } 2259 2260 /** 2261 * ibmvfc_match_evt - Match function for specified event 2262 * @evt: ibmvfc event struct 2263 * @match: event to match 2264 * 2265 * Returns: 2266 * 1 if event matches key / 0 if event does not match key 2267 **/ 2268 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) 2269 { 2270 if (evt == match) 2271 return 1; 2272 return 0; 2273 } 2274 2275 /** 2276 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2277 * @sdev: scsi device to abort commands 2278 * 2279 * This sends an Abort Task Set to the VIOS for the specified device. This does 2280 * NOT send any cancel to the VIOS. That must be done separately. 2281 * 2282 * Returns: 2283 * 0 on success / other on failure 2284 **/ 2285 static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2286 { 2287 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2288 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2289 struct ibmvfc_cmd *tmf; 2290 struct ibmvfc_event *evt, *found_evt; 2291 union ibmvfc_iu rsp_iu; 2292 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 2293 int rc, rsp_rc = -EBUSY; 2294 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2295 int rsp_code = 0; 2296 2297 spin_lock_irqsave(vhost->host->host_lock, flags); 2298 found_evt = NULL; 2299 list_for_each_entry(evt, &vhost->sent, queue) { 2300 if (evt->cmnd && evt->cmnd->device == sdev) { 2301 found_evt = evt; 2302 break; 2303 } 2304 } 2305 2306 if (!found_evt) { 2307 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2308 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2309 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2310 return 0; 2311 } 2312 2313 if (vhost->state == IBMVFC_ACTIVE) { 2314 evt = ibmvfc_get_event(vhost); 2315 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2316 2317 tmf = &evt->iu.cmd; 2318 memset(tmf, 0, sizeof(*tmf)); 2319 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 2320 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); 2321 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 2322 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); 2323 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); 2324 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2325 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); 2326 int_to_scsilun(sdev->lun, &tmf->iu.lun); 2327 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2328 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 2329 evt->sync_iu = &rsp_iu; 2330 2331 init_completion(&evt->comp); 2332 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2333 } 2334 2335 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2336 2337 if (rsp_rc != 0) { 2338 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2339 return -EIO; 2340 } 2341 2342 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2343 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2344 2345 if (!timeout) { 2346 rc = ibmvfc_cancel_all(sdev, 0); 2347 if (!rc) { 2348 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2349 if (rc == SUCCESS) 2350 rc = 0; 2351 } 2352 2353 if (rc) { 2354 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2355 ibmvfc_reset_host(vhost); 2356 rsp_rc = -EIO; 2357 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2358 2359 if (rc == SUCCESS) 2360 rsp_rc = 0; 2361 2362 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); 2363 if (rc != SUCCESS) { 2364 spin_lock_irqsave(vhost->host->host_lock, flags); 2365 ibmvfc_hard_reset_host(vhost); 2366 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2367 rsp_rc = 0; 2368 } 2369 2370 goto out; 2371 } 2372 } 2373 2374 if (rsp_iu.cmd.status) 2375 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2376 2377 if (rsp_code) { 2378 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2379 rsp_code = fc_rsp->data.info.rsp_code; 2380 2381 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2382 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2383 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2384 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2385 fc_rsp->scsi_status); 2386 rsp_rc = -EIO; 2387 } else 2388 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2389 2390 out: 2391 spin_lock_irqsave(vhost->host->host_lock, flags); 2392 ibmvfc_free_event(evt); 2393 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2394 return rsp_rc; 2395 } 2396 2397 /** 2398 * ibmvfc_eh_abort_handler - Abort a command 2399 * @cmd: scsi command to abort 2400 * 2401 * Returns: 2402 * SUCCESS / FAST_IO_FAIL / FAILED 2403 **/ 2404 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2405 { 2406 struct scsi_device *sdev = cmd->device; 2407 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2408 int cancel_rc, block_rc; 2409 int rc = FAILED; 2410 2411 ENTER; 2412 block_rc = fc_block_scsi_eh(cmd); 2413 ibmvfc_wait_while_resetting(vhost); 2414 if (block_rc != FAST_IO_FAIL) { 2415 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2416 ibmvfc_abort_task_set(sdev); 2417 } else 2418 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2419 2420 if (!cancel_rc) 2421 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2422 2423 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2424 rc = FAST_IO_FAIL; 2425 2426 LEAVE; 2427 return rc; 2428 } 2429 2430 /** 2431 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2432 * @cmd: scsi command struct 2433 * 2434 * Returns: 2435 * SUCCESS / FAST_IO_FAIL / FAILED 2436 **/ 2437 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2438 { 2439 struct scsi_device *sdev = cmd->device; 2440 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2441 int cancel_rc, block_rc, reset_rc = 0; 2442 int rc = FAILED; 2443 2444 ENTER; 2445 block_rc = fc_block_scsi_eh(cmd); 2446 ibmvfc_wait_while_resetting(vhost); 2447 if (block_rc != FAST_IO_FAIL) { 2448 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2449 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2450 } else 2451 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2452 2453 if (!cancel_rc && !reset_rc) 2454 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2455 2456 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2457 rc = FAST_IO_FAIL; 2458 2459 LEAVE; 2460 return rc; 2461 } 2462 2463 /** 2464 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function 2465 * @sdev: scsi device struct 2466 * @data: return code 2467 * 2468 **/ 2469 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) 2470 { 2471 unsigned long *rc = data; 2472 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2473 } 2474 2475 /** 2476 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2477 * @sdev: scsi device struct 2478 * @data: return code 2479 * 2480 **/ 2481 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2482 { 2483 unsigned long *rc = data; 2484 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2485 } 2486 2487 /** 2488 * ibmvfc_eh_target_reset_handler - Reset the target 2489 * @cmd: scsi command struct 2490 * 2491 * Returns: 2492 * SUCCESS / FAST_IO_FAIL / FAILED 2493 **/ 2494 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2495 { 2496 struct scsi_device *sdev = cmd->device; 2497 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2498 struct scsi_target *starget = scsi_target(sdev); 2499 int block_rc; 2500 int reset_rc = 0; 2501 int rc = FAILED; 2502 unsigned long cancel_rc = 0; 2503 2504 ENTER; 2505 block_rc = fc_block_scsi_eh(cmd); 2506 ibmvfc_wait_while_resetting(vhost); 2507 if (block_rc != FAST_IO_FAIL) { 2508 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2509 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2510 } else 2511 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); 2512 2513 if (!cancel_rc && !reset_rc) 2514 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2515 2516 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2517 rc = FAST_IO_FAIL; 2518 2519 LEAVE; 2520 return rc; 2521 } 2522 2523 /** 2524 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2525 * @cmd: struct scsi_cmnd having problems 2526 * 2527 **/ 2528 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2529 { 2530 int rc; 2531 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2532 2533 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2534 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2535 2536 return rc ? FAILED : SUCCESS; 2537 } 2538 2539 /** 2540 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2541 * @rport: rport struct 2542 * 2543 * Return value: 2544 * none 2545 **/ 2546 static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2547 { 2548 struct Scsi_Host *shost = rport_to_shost(rport); 2549 struct ibmvfc_host *vhost = shost_priv(shost); 2550 struct fc_rport *dev_rport; 2551 struct scsi_device *sdev; 2552 unsigned long rc; 2553 2554 ENTER; 2555 shost_for_each_device(sdev, shost) { 2556 dev_rport = starget_to_rport(scsi_target(sdev)); 2557 if (dev_rport != rport) 2558 continue; 2559 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2560 } 2561 2562 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 2563 2564 if (rc == FAILED) 2565 ibmvfc_issue_fc_host_lip(shost); 2566 LEAVE; 2567 } 2568 2569 static const struct ibmvfc_async_desc ae_desc [] = { 2570 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2571 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2572 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2573 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2574 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2575 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, 2576 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, 2577 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, 2578 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, 2579 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, 2580 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, 2581 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, 2582 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, 2583 }; 2584 2585 static const struct ibmvfc_async_desc unknown_ae = { 2586 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL 2587 }; 2588 2589 /** 2590 * ibmvfc_get_ae_desc - Get text description for async event 2591 * @ae: async event 2592 * 2593 **/ 2594 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 2595 { 2596 int i; 2597 2598 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2599 if (ae_desc[i].ae == ae) 2600 return &ae_desc[i]; 2601 2602 return &unknown_ae; 2603 } 2604 2605 static const struct { 2606 enum ibmvfc_ae_link_state state; 2607 const char *desc; 2608 } link_desc [] = { 2609 { IBMVFC_AE_LS_LINK_UP, " link up" }, 2610 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 2611 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 2612 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 2613 }; 2614 2615 /** 2616 * ibmvfc_get_link_state - Get text description for link state 2617 * @state: link state 2618 * 2619 **/ 2620 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 2621 { 2622 int i; 2623 2624 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 2625 if (link_desc[i].state == state) 2626 return link_desc[i].desc; 2627 2628 return ""; 2629 } 2630 2631 /** 2632 * ibmvfc_handle_async - Handle an async event from the adapter 2633 * @crq: crq to process 2634 * @vhost: ibmvfc host struct 2635 * 2636 **/ 2637 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2638 struct ibmvfc_host *vhost) 2639 { 2640 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); 2641 struct ibmvfc_target *tgt; 2642 2643 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 2644 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id), 2645 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name), 2646 ibmvfc_get_link_state(crq->link_state)); 2647 2648 switch (be64_to_cpu(crq->event)) { 2649 case IBMVFC_AE_RESUME: 2650 switch (crq->link_state) { 2651 case IBMVFC_AE_LS_LINK_DOWN: 2652 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2653 break; 2654 case IBMVFC_AE_LS_LINK_DEAD: 2655 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2656 break; 2657 case IBMVFC_AE_LS_LINK_UP: 2658 case IBMVFC_AE_LS_LINK_BOUNCED: 2659 default: 2660 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2661 vhost->delay_init = 1; 2662 __ibmvfc_reset_host(vhost); 2663 break; 2664 } 2665 2666 break; 2667 case IBMVFC_AE_LINK_UP: 2668 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2669 vhost->delay_init = 1; 2670 __ibmvfc_reset_host(vhost); 2671 break; 2672 case IBMVFC_AE_SCN_FABRIC: 2673 case IBMVFC_AE_SCN_DOMAIN: 2674 vhost->events_to_log |= IBMVFC_AE_RSCN; 2675 if (vhost->state < IBMVFC_HALTED) { 2676 vhost->delay_init = 1; 2677 __ibmvfc_reset_host(vhost); 2678 } 2679 break; 2680 case IBMVFC_AE_SCN_NPORT: 2681 case IBMVFC_AE_SCN_GROUP: 2682 vhost->events_to_log |= IBMVFC_AE_RSCN; 2683 ibmvfc_reinit_host(vhost); 2684 break; 2685 case IBMVFC_AE_ELS_LOGO: 2686 case IBMVFC_AE_ELS_PRLO: 2687 case IBMVFC_AE_ELS_PLOGI: 2688 list_for_each_entry(tgt, &vhost->targets, queue) { 2689 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 2690 break; 2691 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) 2692 continue; 2693 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) 2694 continue; 2695 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) 2696 continue; 2697 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) 2698 tgt->logo_rcvd = 1; 2699 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { 2700 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2701 ibmvfc_reinit_host(vhost); 2702 } 2703 } 2704 break; 2705 case IBMVFC_AE_LINK_DOWN: 2706 case IBMVFC_AE_ADAPTER_FAILED: 2707 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2708 break; 2709 case IBMVFC_AE_LINK_DEAD: 2710 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2711 break; 2712 case IBMVFC_AE_HALT: 2713 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2714 break; 2715 default: 2716 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2717 break; 2718 } 2719 } 2720 2721 /** 2722 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2723 * @crq: Command/Response queue 2724 * @vhost: ibmvfc host struct 2725 * 2726 **/ 2727 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2728 { 2729 long rc; 2730 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 2731 2732 switch (crq->valid) { 2733 case IBMVFC_CRQ_INIT_RSP: 2734 switch (crq->format) { 2735 case IBMVFC_CRQ_INIT: 2736 dev_info(vhost->dev, "Partner initialized\n"); 2737 /* Send back a response */ 2738 rc = ibmvfc_send_crq_init_complete(vhost); 2739 if (rc == 0) 2740 ibmvfc_init_host(vhost); 2741 else 2742 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2743 break; 2744 case IBMVFC_CRQ_INIT_COMPLETE: 2745 dev_info(vhost->dev, "Partner initialization complete\n"); 2746 ibmvfc_init_host(vhost); 2747 break; 2748 default: 2749 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2750 } 2751 return; 2752 case IBMVFC_CRQ_XPORT_EVENT: 2753 vhost->state = IBMVFC_NO_CRQ; 2754 vhost->logged_in = 0; 2755 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2756 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2757 /* We need to re-setup the interpartition connection */ 2758 dev_info(vhost->dev, "Re-enabling adapter\n"); 2759 vhost->client_migrated = 1; 2760 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2761 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2762 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 2763 } else { 2764 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2765 ibmvfc_purge_requests(vhost, DID_ERROR); 2766 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2767 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 2768 } 2769 return; 2770 case IBMVFC_CRQ_CMD_RSP: 2771 break; 2772 default: 2773 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2774 return; 2775 } 2776 2777 if (crq->format == IBMVFC_ASYNC_EVENT) 2778 return; 2779 2780 /* The only kind of payload CRQs we should get are responses to 2781 * things we send. Make sure this response is to something we 2782 * actually sent 2783 */ 2784 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2785 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2786 crq->ioba); 2787 return; 2788 } 2789 2790 if (unlikely(atomic_read(&evt->free))) { 2791 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2792 crq->ioba); 2793 return; 2794 } 2795 2796 del_timer(&evt->timer); 2797 list_del(&evt->queue); 2798 ibmvfc_trc_end(evt); 2799 evt->done(evt); 2800 } 2801 2802 /** 2803 * ibmvfc_scan_finished - Check if the device scan is done. 2804 * @shost: scsi host struct 2805 * @time: current elapsed time 2806 * 2807 * Returns: 2808 * 0 if scan is not done / 1 if scan is done 2809 **/ 2810 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2811 { 2812 unsigned long flags; 2813 struct ibmvfc_host *vhost = shost_priv(shost); 2814 int done = 0; 2815 2816 spin_lock_irqsave(shost->host_lock, flags); 2817 if (time >= (init_timeout * HZ)) { 2818 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2819 "continuing initialization\n", init_timeout); 2820 done = 1; 2821 } 2822 2823 if (vhost->scan_complete) 2824 done = 1; 2825 spin_unlock_irqrestore(shost->host_lock, flags); 2826 return done; 2827 } 2828 2829 /** 2830 * ibmvfc_slave_alloc - Setup the device's task set value 2831 * @sdev: struct scsi_device device to configure 2832 * 2833 * Set the device's task set value so that error handling works as 2834 * expected. 2835 * 2836 * Returns: 2837 * 0 on success / -ENXIO if device does not exist 2838 **/ 2839 static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2840 { 2841 struct Scsi_Host *shost = sdev->host; 2842 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2843 struct ibmvfc_host *vhost = shost_priv(shost); 2844 unsigned long flags = 0; 2845 2846 if (!rport || fc_remote_port_chkready(rport)) 2847 return -ENXIO; 2848 2849 spin_lock_irqsave(shost->host_lock, flags); 2850 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2851 spin_unlock_irqrestore(shost->host_lock, flags); 2852 return 0; 2853 } 2854 2855 /** 2856 * ibmvfc_target_alloc - Setup the target's task set value 2857 * @starget: struct scsi_target 2858 * 2859 * Set the target's task set value so that error handling works as 2860 * expected. 2861 * 2862 * Returns: 2863 * 0 on success / -ENXIO if device does not exist 2864 **/ 2865 static int ibmvfc_target_alloc(struct scsi_target *starget) 2866 { 2867 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2868 struct ibmvfc_host *vhost = shost_priv(shost); 2869 unsigned long flags = 0; 2870 2871 spin_lock_irqsave(shost->host_lock, flags); 2872 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2873 spin_unlock_irqrestore(shost->host_lock, flags); 2874 return 0; 2875 } 2876 2877 /** 2878 * ibmvfc_slave_configure - Configure the device 2879 * @sdev: struct scsi_device device to configure 2880 * 2881 * Enable allow_restart for a device if it is a disk. Adjust the 2882 * queue_depth here also. 2883 * 2884 * Returns: 2885 * 0 2886 **/ 2887 static int ibmvfc_slave_configure(struct scsi_device *sdev) 2888 { 2889 struct Scsi_Host *shost = sdev->host; 2890 unsigned long flags = 0; 2891 2892 spin_lock_irqsave(shost->host_lock, flags); 2893 if (sdev->type == TYPE_DISK) 2894 sdev->allow_restart = 1; 2895 spin_unlock_irqrestore(shost->host_lock, flags); 2896 return 0; 2897 } 2898 2899 /** 2900 * ibmvfc_change_queue_depth - Change the device's queue depth 2901 * @sdev: scsi device struct 2902 * @qdepth: depth to set 2903 * @reason: calling context 2904 * 2905 * Return value: 2906 * actual depth set 2907 **/ 2908 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 2909 { 2910 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2911 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2912 2913 return scsi_change_queue_depth(sdev, qdepth); 2914 } 2915 2916 static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2917 struct device_attribute *attr, char *buf) 2918 { 2919 struct Scsi_Host *shost = class_to_shost(dev); 2920 struct ibmvfc_host *vhost = shost_priv(shost); 2921 2922 return snprintf(buf, PAGE_SIZE, "%s\n", 2923 vhost->login_buf->resp.partition_name); 2924 } 2925 2926 static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2927 struct device_attribute *attr, char *buf) 2928 { 2929 struct Scsi_Host *shost = class_to_shost(dev); 2930 struct ibmvfc_host *vhost = shost_priv(shost); 2931 2932 return snprintf(buf, PAGE_SIZE, "%s\n", 2933 vhost->login_buf->resp.device_name); 2934 } 2935 2936 static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2937 struct device_attribute *attr, char *buf) 2938 { 2939 struct Scsi_Host *shost = class_to_shost(dev); 2940 struct ibmvfc_host *vhost = shost_priv(shost); 2941 2942 return snprintf(buf, PAGE_SIZE, "%s\n", 2943 vhost->login_buf->resp.port_loc_code); 2944 } 2945 2946 static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2947 struct device_attribute *attr, char *buf) 2948 { 2949 struct Scsi_Host *shost = class_to_shost(dev); 2950 struct ibmvfc_host *vhost = shost_priv(shost); 2951 2952 return snprintf(buf, PAGE_SIZE, "%s\n", 2953 vhost->login_buf->resp.drc_name); 2954 } 2955 2956 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2957 struct device_attribute *attr, char *buf) 2958 { 2959 struct Scsi_Host *shost = class_to_shost(dev); 2960 struct ibmvfc_host *vhost = shost_priv(shost); 2961 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2962 } 2963 2964 static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 2965 struct device_attribute *attr, char *buf) 2966 { 2967 struct Scsi_Host *shost = class_to_shost(dev); 2968 struct ibmvfc_host *vhost = shost_priv(shost); 2969 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); 2970 } 2971 2972 /** 2973 * ibmvfc_show_log_level - Show the adapter's error logging level 2974 * @dev: class device struct 2975 * @buf: buffer 2976 * 2977 * Return value: 2978 * number of bytes printed to buffer 2979 **/ 2980 static ssize_t ibmvfc_show_log_level(struct device *dev, 2981 struct device_attribute *attr, char *buf) 2982 { 2983 struct Scsi_Host *shost = class_to_shost(dev); 2984 struct ibmvfc_host *vhost = shost_priv(shost); 2985 unsigned long flags = 0; 2986 int len; 2987 2988 spin_lock_irqsave(shost->host_lock, flags); 2989 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2990 spin_unlock_irqrestore(shost->host_lock, flags); 2991 return len; 2992 } 2993 2994 /** 2995 * ibmvfc_store_log_level - Change the adapter's error logging level 2996 * @dev: class device struct 2997 * @buf: buffer 2998 * 2999 * Return value: 3000 * number of bytes printed to buffer 3001 **/ 3002 static ssize_t ibmvfc_store_log_level(struct device *dev, 3003 struct device_attribute *attr, 3004 const char *buf, size_t count) 3005 { 3006 struct Scsi_Host *shost = class_to_shost(dev); 3007 struct ibmvfc_host *vhost = shost_priv(shost); 3008 unsigned long flags = 0; 3009 3010 spin_lock_irqsave(shost->host_lock, flags); 3011 vhost->log_level = simple_strtoul(buf, NULL, 10); 3012 spin_unlock_irqrestore(shost->host_lock, flags); 3013 return strlen(buf); 3014 } 3015 3016 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 3017 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 3018 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 3019 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 3020 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 3021 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 3022 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 3023 ibmvfc_show_log_level, ibmvfc_store_log_level); 3024 3025 #ifdef CONFIG_SCSI_IBMVFC_TRACE 3026 /** 3027 * ibmvfc_read_trace - Dump the adapter trace 3028 * @filp: open sysfs file 3029 * @kobj: kobject struct 3030 * @bin_attr: bin_attribute struct 3031 * @buf: buffer 3032 * @off: offset 3033 * @count: buffer size 3034 * 3035 * Return value: 3036 * number of bytes printed to buffer 3037 **/ 3038 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 3039 struct bin_attribute *bin_attr, 3040 char *buf, loff_t off, size_t count) 3041 { 3042 struct device *dev = container_of(kobj, struct device, kobj); 3043 struct Scsi_Host *shost = class_to_shost(dev); 3044 struct ibmvfc_host *vhost = shost_priv(shost); 3045 unsigned long flags = 0; 3046 int size = IBMVFC_TRACE_SIZE; 3047 char *src = (char *)vhost->trace; 3048 3049 if (off > size) 3050 return 0; 3051 if (off + count > size) { 3052 size -= off; 3053 count = size; 3054 } 3055 3056 spin_lock_irqsave(shost->host_lock, flags); 3057 memcpy(buf, &src[off], count); 3058 spin_unlock_irqrestore(shost->host_lock, flags); 3059 return count; 3060 } 3061 3062 static struct bin_attribute ibmvfc_trace_attr = { 3063 .attr = { 3064 .name = "trace", 3065 .mode = S_IRUGO, 3066 }, 3067 .size = 0, 3068 .read = ibmvfc_read_trace, 3069 }; 3070 #endif 3071 3072 static struct device_attribute *ibmvfc_attrs[] = { 3073 &dev_attr_partition_name, 3074 &dev_attr_device_name, 3075 &dev_attr_port_loc_code, 3076 &dev_attr_drc_name, 3077 &dev_attr_npiv_version, 3078 &dev_attr_capabilities, 3079 &dev_attr_log_level, 3080 NULL 3081 }; 3082 3083 static struct scsi_host_template driver_template = { 3084 .module = THIS_MODULE, 3085 .name = "IBM POWER Virtual FC Adapter", 3086 .proc_name = IBMVFC_NAME, 3087 .queuecommand = ibmvfc_queuecommand, 3088 .eh_timed_out = fc_eh_timed_out, 3089 .eh_abort_handler = ibmvfc_eh_abort_handler, 3090 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3091 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3092 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3093 .slave_alloc = ibmvfc_slave_alloc, 3094 .slave_configure = ibmvfc_slave_configure, 3095 .target_alloc = ibmvfc_target_alloc, 3096 .scan_finished = ibmvfc_scan_finished, 3097 .change_queue_depth = ibmvfc_change_queue_depth, 3098 .cmd_per_lun = 16, 3099 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3100 .this_id = -1, 3101 .sg_tablesize = SG_ALL, 3102 .max_sectors = IBMVFC_MAX_SECTORS, 3103 .use_clustering = ENABLE_CLUSTERING, 3104 .shost_attrs = ibmvfc_attrs, 3105 .track_queue_depth = 1, 3106 }; 3107 3108 /** 3109 * ibmvfc_next_async_crq - Returns the next entry in async queue 3110 * @vhost: ibmvfc host struct 3111 * 3112 * Returns: 3113 * Pointer to next entry in queue / NULL if empty 3114 **/ 3115 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3116 { 3117 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 3118 struct ibmvfc_async_crq *crq; 3119 3120 crq = &async_crq->msgs[async_crq->cur]; 3121 if (crq->valid & 0x80) { 3122 if (++async_crq->cur == async_crq->size) 3123 async_crq->cur = 0; 3124 rmb(); 3125 } else 3126 crq = NULL; 3127 3128 return crq; 3129 } 3130 3131 /** 3132 * ibmvfc_next_crq - Returns the next entry in message queue 3133 * @vhost: ibmvfc host struct 3134 * 3135 * Returns: 3136 * Pointer to next entry in queue / NULL if empty 3137 **/ 3138 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3139 { 3140 struct ibmvfc_crq_queue *queue = &vhost->crq; 3141 struct ibmvfc_crq *crq; 3142 3143 crq = &queue->msgs[queue->cur]; 3144 if (crq->valid & 0x80) { 3145 if (++queue->cur == queue->size) 3146 queue->cur = 0; 3147 rmb(); 3148 } else 3149 crq = NULL; 3150 3151 return crq; 3152 } 3153 3154 /** 3155 * ibmvfc_interrupt - Interrupt handler 3156 * @irq: number of irq to handle, not used 3157 * @dev_instance: ibmvfc_host that received interrupt 3158 * 3159 * Returns: 3160 * IRQ_HANDLED 3161 **/ 3162 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3163 { 3164 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3165 unsigned long flags; 3166 3167 spin_lock_irqsave(vhost->host->host_lock, flags); 3168 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3169 tasklet_schedule(&vhost->tasklet); 3170 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3171 return IRQ_HANDLED; 3172 } 3173 3174 /** 3175 * ibmvfc_tasklet - Interrupt handler tasklet 3176 * @data: ibmvfc host struct 3177 * 3178 * Returns: 3179 * Nothing 3180 **/ 3181 static void ibmvfc_tasklet(void *data) 3182 { 3183 struct ibmvfc_host *vhost = data; 3184 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3185 struct ibmvfc_crq *crq; 3186 struct ibmvfc_async_crq *async; 3187 unsigned long flags; 3188 int done = 0; 3189 3190 spin_lock_irqsave(vhost->host->host_lock, flags); 3191 while (!done) { 3192 /* Pull all the valid messages off the async CRQ */ 3193 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3194 ibmvfc_handle_async(async, vhost); 3195 async->valid = 0; 3196 wmb(); 3197 } 3198 3199 /* Pull all the valid messages off the CRQ */ 3200 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3201 ibmvfc_handle_crq(crq, vhost); 3202 crq->valid = 0; 3203 wmb(); 3204 } 3205 3206 vio_enable_interrupts(vdev); 3207 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3208 vio_disable_interrupts(vdev); 3209 ibmvfc_handle_async(async, vhost); 3210 async->valid = 0; 3211 wmb(); 3212 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3213 vio_disable_interrupts(vdev); 3214 ibmvfc_handle_crq(crq, vhost); 3215 crq->valid = 0; 3216 wmb(); 3217 } else 3218 done = 1; 3219 } 3220 3221 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3222 } 3223 3224 /** 3225 * ibmvfc_init_tgt - Set the next init job step for the target 3226 * @tgt: ibmvfc target struct 3227 * @job_step: job step to perform 3228 * 3229 **/ 3230 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3231 void (*job_step) (struct ibmvfc_target *)) 3232 { 3233 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 3234 tgt->job_step = job_step; 3235 wake_up(&tgt->vhost->work_wait_q); 3236 } 3237 3238 /** 3239 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3240 * @tgt: ibmvfc target struct 3241 * @job_step: initialization job step 3242 * 3243 * Returns: 1 if step will be retried / 0 if not 3244 * 3245 **/ 3246 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3247 void (*job_step) (struct ibmvfc_target *)) 3248 { 3249 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3250 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3251 wake_up(&tgt->vhost->work_wait_q); 3252 return 0; 3253 } else 3254 ibmvfc_init_tgt(tgt, job_step); 3255 return 1; 3256 } 3257 3258 /* Defined in FC-LS */ 3259 static const struct { 3260 int code; 3261 int retry; 3262 int logged_in; 3263 } prli_rsp [] = { 3264 { 0, 1, 0 }, 3265 { 1, 0, 1 }, 3266 { 2, 1, 0 }, 3267 { 3, 1, 0 }, 3268 { 4, 0, 0 }, 3269 { 5, 0, 0 }, 3270 { 6, 0, 1 }, 3271 { 7, 0, 0 }, 3272 { 8, 1, 0 }, 3273 }; 3274 3275 /** 3276 * ibmvfc_get_prli_rsp - Find PRLI response index 3277 * @flags: PRLI response flags 3278 * 3279 **/ 3280 static int ibmvfc_get_prli_rsp(u16 flags) 3281 { 3282 int i; 3283 int code = (flags & 0x0f00) >> 8; 3284 3285 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3286 if (prli_rsp[i].code == code) 3287 return i; 3288 3289 return 0; 3290 } 3291 3292 /** 3293 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3294 * @evt: ibmvfc event struct 3295 * 3296 **/ 3297 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3298 { 3299 struct ibmvfc_target *tgt = evt->tgt; 3300 struct ibmvfc_host *vhost = evt->vhost; 3301 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3302 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3303 u32 status = be16_to_cpu(rsp->common.status); 3304 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3305 3306 vhost->discovery_threads--; 3307 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3308 switch (status) { 3309 case IBMVFC_MAD_SUCCESS: 3310 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3311 parms->type, parms->flags, parms->service_parms); 3312 3313 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3314 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); 3315 if (prli_rsp[index].logged_in) { 3316 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { 3317 tgt->need_login = 0; 3318 tgt->ids.roles = 0; 3319 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) 3320 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3321 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) 3322 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3323 tgt->add_rport = 1; 3324 } else 3325 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3326 } else if (prli_rsp[index].retry) 3327 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3328 else 3329 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3330 } else 3331 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3332 break; 3333 case IBMVFC_MAD_DRIVER_FAILED: 3334 break; 3335 case IBMVFC_MAD_CRQ_ERROR: 3336 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3337 break; 3338 case IBMVFC_MAD_FAILED: 3339 default: 3340 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && 3341 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) 3342 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3343 else if (tgt->logo_rcvd) 3344 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3345 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3346 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3347 else 3348 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3349 3350 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3351 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3352 rsp->status, rsp->error, status); 3353 break; 3354 } 3355 3356 kref_put(&tgt->kref, ibmvfc_release_tgt); 3357 ibmvfc_free_event(evt); 3358 wake_up(&vhost->work_wait_q); 3359 } 3360 3361 /** 3362 * ibmvfc_tgt_send_prli - Send a process login 3363 * @tgt: ibmvfc target struct 3364 * 3365 **/ 3366 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3367 { 3368 struct ibmvfc_process_login *prli; 3369 struct ibmvfc_host *vhost = tgt->vhost; 3370 struct ibmvfc_event *evt; 3371 3372 if (vhost->discovery_threads >= disc_threads) 3373 return; 3374 3375 kref_get(&tgt->kref); 3376 evt = ibmvfc_get_event(vhost); 3377 vhost->discovery_threads++; 3378 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 3379 evt->tgt = tgt; 3380 prli = &evt->iu.prli; 3381 memset(prli, 0, sizeof(*prli)); 3382 prli->common.version = cpu_to_be32(1); 3383 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); 3384 prli->common.length = cpu_to_be16(sizeof(*prli)); 3385 prli->scsi_id = cpu_to_be64(tgt->scsi_id); 3386 3387 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 3388 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); 3389 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); 3390 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED); 3391 3392 if (cls3_error) 3393 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY); 3394 3395 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3396 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3397 vhost->discovery_threads--; 3398 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3399 kref_put(&tgt->kref, ibmvfc_release_tgt); 3400 } else 3401 tgt_dbg(tgt, "Sent process login\n"); 3402 } 3403 3404 /** 3405 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 3406 * @evt: ibmvfc event struct 3407 * 3408 **/ 3409 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 3410 { 3411 struct ibmvfc_target *tgt = evt->tgt; 3412 struct ibmvfc_host *vhost = evt->vhost; 3413 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 3414 u32 status = be16_to_cpu(rsp->common.status); 3415 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3416 3417 vhost->discovery_threads--; 3418 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3419 switch (status) { 3420 case IBMVFC_MAD_SUCCESS: 3421 tgt_dbg(tgt, "Port Login succeeded\n"); 3422 if (tgt->ids.port_name && 3423 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 3424 vhost->reinit = 1; 3425 tgt_dbg(tgt, "Port re-init required\n"); 3426 break; 3427 } 3428 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3429 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3430 tgt->ids.port_id = tgt->scsi_id; 3431 memcpy(&tgt->service_parms, &rsp->service_parms, 3432 sizeof(tgt->service_parms)); 3433 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3434 sizeof(tgt->service_parms_change)); 3435 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3436 break; 3437 case IBMVFC_MAD_DRIVER_FAILED: 3438 break; 3439 case IBMVFC_MAD_CRQ_ERROR: 3440 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3441 break; 3442 case IBMVFC_MAD_FAILED: 3443 default: 3444 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3445 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3446 else 3447 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3448 3449 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3450 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), rsp->status, rsp->error, 3451 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), rsp->fc_type, 3452 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), rsp->fc_explain, status); 3453 break; 3454 } 3455 3456 kref_put(&tgt->kref, ibmvfc_release_tgt); 3457 ibmvfc_free_event(evt); 3458 wake_up(&vhost->work_wait_q); 3459 } 3460 3461 /** 3462 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3463 * @tgt: ibmvfc target struct 3464 * 3465 **/ 3466 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3467 { 3468 struct ibmvfc_port_login *plogi; 3469 struct ibmvfc_host *vhost = tgt->vhost; 3470 struct ibmvfc_event *evt; 3471 3472 if (vhost->discovery_threads >= disc_threads) 3473 return; 3474 3475 kref_get(&tgt->kref); 3476 tgt->logo_rcvd = 0; 3477 evt = ibmvfc_get_event(vhost); 3478 vhost->discovery_threads++; 3479 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3480 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3481 evt->tgt = tgt; 3482 plogi = &evt->iu.plogi; 3483 memset(plogi, 0, sizeof(*plogi)); 3484 plogi->common.version = cpu_to_be32(1); 3485 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 3486 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 3487 plogi->scsi_id = cpu_to_be64(tgt->scsi_id); 3488 3489 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3490 vhost->discovery_threads--; 3491 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3492 kref_put(&tgt->kref, ibmvfc_release_tgt); 3493 } else 3494 tgt_dbg(tgt, "Sent port login\n"); 3495 } 3496 3497 /** 3498 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3499 * @evt: ibmvfc event struct 3500 * 3501 **/ 3502 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3503 { 3504 struct ibmvfc_target *tgt = evt->tgt; 3505 struct ibmvfc_host *vhost = evt->vhost; 3506 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3507 u32 status = be16_to_cpu(rsp->common.status); 3508 3509 vhost->discovery_threads--; 3510 ibmvfc_free_event(evt); 3511 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3512 3513 switch (status) { 3514 case IBMVFC_MAD_SUCCESS: 3515 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3516 break; 3517 case IBMVFC_MAD_DRIVER_FAILED: 3518 kref_put(&tgt->kref, ibmvfc_release_tgt); 3519 wake_up(&vhost->work_wait_q); 3520 return; 3521 case IBMVFC_MAD_FAILED: 3522 default: 3523 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3524 break; 3525 } 3526 3527 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3528 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3529 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3530 tgt->scsi_id != tgt->new_scsi_id) 3531 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3532 kref_put(&tgt->kref, ibmvfc_release_tgt); 3533 wake_up(&vhost->work_wait_q); 3534 } 3535 3536 /** 3537 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3538 * @tgt: ibmvfc target struct 3539 * 3540 **/ 3541 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3542 { 3543 struct ibmvfc_implicit_logout *mad; 3544 struct ibmvfc_host *vhost = tgt->vhost; 3545 struct ibmvfc_event *evt; 3546 3547 if (vhost->discovery_threads >= disc_threads) 3548 return; 3549 3550 kref_get(&tgt->kref); 3551 evt = ibmvfc_get_event(vhost); 3552 vhost->discovery_threads++; 3553 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3554 evt->tgt = tgt; 3555 mad = &evt->iu.implicit_logout; 3556 memset(mad, 0, sizeof(*mad)); 3557 mad->common.version = cpu_to_be32(1); 3558 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); 3559 mad->common.length = cpu_to_be16(sizeof(*mad)); 3560 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); 3561 3562 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3563 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3564 vhost->discovery_threads--; 3565 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3566 kref_put(&tgt->kref, ibmvfc_release_tgt); 3567 } else 3568 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3569 } 3570 3571 /** 3572 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3573 * @mad: ibmvfc passthru mad struct 3574 * @tgt: ibmvfc target struct 3575 * 3576 * Returns: 3577 * 1 if PLOGI needed / 0 if PLOGI not needed 3578 **/ 3579 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3580 struct ibmvfc_target *tgt) 3581 { 3582 if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name) 3583 return 1; 3584 if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name) 3585 return 1; 3586 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) 3587 return 1; 3588 return 0; 3589 } 3590 3591 /** 3592 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3593 * @evt: ibmvfc event struct 3594 * 3595 **/ 3596 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3597 { 3598 struct ibmvfc_target *tgt = evt->tgt; 3599 struct ibmvfc_host *vhost = evt->vhost; 3600 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3601 u32 status = be16_to_cpu(mad->common.status); 3602 u8 fc_reason, fc_explain; 3603 3604 vhost->discovery_threads--; 3605 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3606 del_timer(&tgt->timer); 3607 3608 switch (status) { 3609 case IBMVFC_MAD_SUCCESS: 3610 tgt_dbg(tgt, "ADISC succeeded\n"); 3611 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3612 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3613 break; 3614 case IBMVFC_MAD_DRIVER_FAILED: 3615 break; 3616 case IBMVFC_MAD_FAILED: 3617 default: 3618 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3619 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; 3620 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; 3621 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3622 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), 3623 mad->iu.status, mad->iu.error, 3624 ibmvfc_get_fc_type(fc_reason), fc_reason, 3625 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3626 break; 3627 } 3628 3629 kref_put(&tgt->kref, ibmvfc_release_tgt); 3630 ibmvfc_free_event(evt); 3631 wake_up(&vhost->work_wait_q); 3632 } 3633 3634 /** 3635 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3636 * @evt: ibmvfc event struct 3637 * 3638 **/ 3639 static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3640 { 3641 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3642 3643 memset(mad, 0, sizeof(*mad)); 3644 mad->common.version = cpu_to_be32(1); 3645 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 3646 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 3647 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3648 offsetof(struct ibmvfc_passthru_mad, iu)); 3649 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 3650 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3651 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3652 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3653 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3654 offsetof(struct ibmvfc_passthru_fc_iu, payload)); 3655 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3656 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3657 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3658 offsetof(struct ibmvfc_passthru_fc_iu, response)); 3659 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3660 } 3661 3662 /** 3663 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3664 * @evt: ibmvfc event struct 3665 * 3666 * Just cleanup this event struct. Everything else is handled by 3667 * the ADISC completion handler. If the ADISC never actually comes 3668 * back, we still have the timer running on the ADISC event struct 3669 * which will fire and cause the CRQ to get reset. 3670 * 3671 **/ 3672 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3673 { 3674 struct ibmvfc_host *vhost = evt->vhost; 3675 struct ibmvfc_target *tgt = evt->tgt; 3676 3677 tgt_dbg(tgt, "ADISC cancel complete\n"); 3678 vhost->abort_threads--; 3679 ibmvfc_free_event(evt); 3680 kref_put(&tgt->kref, ibmvfc_release_tgt); 3681 wake_up(&vhost->work_wait_q); 3682 } 3683 3684 /** 3685 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3686 * @tgt: ibmvfc target struct 3687 * 3688 * If an ADISC times out, send a cancel. If the cancel times 3689 * out, reset the CRQ. When the ADISC comes back as cancelled, 3690 * log back into the target. 3691 **/ 3692 static void ibmvfc_adisc_timeout(struct timer_list *t) 3693 { 3694 struct ibmvfc_target *tgt = from_timer(tgt, t, timer); 3695 struct ibmvfc_host *vhost = tgt->vhost; 3696 struct ibmvfc_event *evt; 3697 struct ibmvfc_tmf *tmf; 3698 unsigned long flags; 3699 int rc; 3700 3701 tgt_dbg(tgt, "ADISC timeout\n"); 3702 spin_lock_irqsave(vhost->host->host_lock, flags); 3703 if (vhost->abort_threads >= disc_threads || 3704 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3705 vhost->state != IBMVFC_INITIALIZING || 3706 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3707 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3708 return; 3709 } 3710 3711 vhost->abort_threads++; 3712 kref_get(&tgt->kref); 3713 evt = ibmvfc_get_event(vhost); 3714 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3715 3716 evt->tgt = tgt; 3717 tmf = &evt->iu.tmf; 3718 memset(tmf, 0, sizeof(*tmf)); 3719 tmf->common.version = cpu_to_be32(1); 3720 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 3721 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 3722 tmf->scsi_id = cpu_to_be64(tgt->scsi_id); 3723 tmf->cancel_key = cpu_to_be32(tgt->cancel_key); 3724 3725 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3726 3727 if (rc) { 3728 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3729 vhost->abort_threads--; 3730 kref_put(&tgt->kref, ibmvfc_release_tgt); 3731 __ibmvfc_reset_host(vhost); 3732 } else 3733 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3734 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3735 } 3736 3737 /** 3738 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3739 * @tgt: ibmvfc target struct 3740 * 3741 * When sending an ADISC we end up with two timers running. The 3742 * first timer is the timer in the ibmvfc target struct. If this 3743 * fires, we send a cancel to the target. The second timer is the 3744 * timer on the ibmvfc event for the ADISC, which is longer. If that 3745 * fires, it means the ADISC timed out and our attempt to cancel it 3746 * also failed, so we need to reset the CRQ. 3747 **/ 3748 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3749 { 3750 struct ibmvfc_passthru_mad *mad; 3751 struct ibmvfc_host *vhost = tgt->vhost; 3752 struct ibmvfc_event *evt; 3753 3754 if (vhost->discovery_threads >= disc_threads) 3755 return; 3756 3757 kref_get(&tgt->kref); 3758 evt = ibmvfc_get_event(vhost); 3759 vhost->discovery_threads++; 3760 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3761 evt->tgt = tgt; 3762 3763 ibmvfc_init_passthru(evt); 3764 mad = &evt->iu.passthru; 3765 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); 3766 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); 3767 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); 3768 3769 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); 3770 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3771 sizeof(vhost->login_buf->resp.port_name)); 3772 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3773 sizeof(vhost->login_buf->resp.node_name)); 3774 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); 3775 3776 if (timer_pending(&tgt->timer)) 3777 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3778 else { 3779 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3780 add_timer(&tgt->timer); 3781 } 3782 3783 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3784 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3785 vhost->discovery_threads--; 3786 del_timer(&tgt->timer); 3787 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3788 kref_put(&tgt->kref, ibmvfc_release_tgt); 3789 } else 3790 tgt_dbg(tgt, "Sent ADISC\n"); 3791 } 3792 3793 /** 3794 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3795 * @evt: ibmvfc event struct 3796 * 3797 **/ 3798 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3799 { 3800 struct ibmvfc_target *tgt = evt->tgt; 3801 struct ibmvfc_host *vhost = evt->vhost; 3802 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3803 u32 status = be16_to_cpu(rsp->common.status); 3804 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3805 3806 vhost->discovery_threads--; 3807 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3808 switch (status) { 3809 case IBMVFC_MAD_SUCCESS: 3810 tgt_dbg(tgt, "Query Target succeeded\n"); 3811 tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id); 3812 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) 3813 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3814 else 3815 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3816 break; 3817 case IBMVFC_MAD_DRIVER_FAILED: 3818 break; 3819 case IBMVFC_MAD_CRQ_ERROR: 3820 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3821 break; 3822 case IBMVFC_MAD_FAILED: 3823 default: 3824 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3825 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && 3826 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) 3827 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3828 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3829 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3830 else 3831 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3832 3833 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3834 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3835 rsp->status, rsp->error, ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), 3836 rsp->fc_type, ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), 3837 rsp->fc_explain, status); 3838 break; 3839 } 3840 3841 kref_put(&tgt->kref, ibmvfc_release_tgt); 3842 ibmvfc_free_event(evt); 3843 wake_up(&vhost->work_wait_q); 3844 } 3845 3846 /** 3847 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3848 * @tgt: ibmvfc target struct 3849 * 3850 **/ 3851 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3852 { 3853 struct ibmvfc_query_tgt *query_tgt; 3854 struct ibmvfc_host *vhost = tgt->vhost; 3855 struct ibmvfc_event *evt; 3856 3857 if (vhost->discovery_threads >= disc_threads) 3858 return; 3859 3860 kref_get(&tgt->kref); 3861 evt = ibmvfc_get_event(vhost); 3862 vhost->discovery_threads++; 3863 evt->tgt = tgt; 3864 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3865 query_tgt = &evt->iu.query_tgt; 3866 memset(query_tgt, 0, sizeof(*query_tgt)); 3867 query_tgt->common.version = cpu_to_be32(1); 3868 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); 3869 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); 3870 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); 3871 3872 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3873 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3874 vhost->discovery_threads--; 3875 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3876 kref_put(&tgt->kref, ibmvfc_release_tgt); 3877 } else 3878 tgt_dbg(tgt, "Sent Query Target\n"); 3879 } 3880 3881 /** 3882 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3883 * @vhost: ibmvfc host struct 3884 * @scsi_id: SCSI ID to allocate target for 3885 * 3886 * Returns: 3887 * 0 on success / other on failure 3888 **/ 3889 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3890 { 3891 struct ibmvfc_target *tgt; 3892 unsigned long flags; 3893 3894 spin_lock_irqsave(vhost->host->host_lock, flags); 3895 list_for_each_entry(tgt, &vhost->targets, queue) { 3896 if (tgt->scsi_id == scsi_id) { 3897 if (tgt->need_login) 3898 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3899 goto unlock_out; 3900 } 3901 } 3902 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3903 3904 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3905 memset(tgt, 0, sizeof(*tgt)); 3906 tgt->scsi_id = scsi_id; 3907 tgt->new_scsi_id = scsi_id; 3908 tgt->vhost = vhost; 3909 tgt->need_login = 1; 3910 tgt->cancel_key = vhost->task_set++; 3911 timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0); 3912 kref_init(&tgt->kref); 3913 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3914 spin_lock_irqsave(vhost->host->host_lock, flags); 3915 list_add_tail(&tgt->queue, &vhost->targets); 3916 3917 unlock_out: 3918 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3919 return 0; 3920 } 3921 3922 /** 3923 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3924 * @vhost: ibmvfc host struct 3925 * 3926 * Returns: 3927 * 0 on success / other on failure 3928 **/ 3929 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3930 { 3931 int i, rc; 3932 3933 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3934 rc = ibmvfc_alloc_target(vhost, 3935 be32_to_cpu(vhost->disc_buf->scsi_id[i]) & 3936 IBMVFC_DISC_TGT_SCSI_ID_MASK); 3937 3938 return rc; 3939 } 3940 3941 /** 3942 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3943 * @evt: ibmvfc event struct 3944 * 3945 **/ 3946 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3947 { 3948 struct ibmvfc_host *vhost = evt->vhost; 3949 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3950 u32 mad_status = be16_to_cpu(rsp->common.status); 3951 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3952 3953 switch (mad_status) { 3954 case IBMVFC_MAD_SUCCESS: 3955 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3956 vhost->num_targets = be32_to_cpu(rsp->num_written); 3957 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3958 break; 3959 case IBMVFC_MAD_FAILED: 3960 level += ibmvfc_retry_host_init(vhost); 3961 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 3962 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3963 rsp->status, rsp->error); 3964 break; 3965 case IBMVFC_MAD_DRIVER_FAILED: 3966 break; 3967 default: 3968 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3969 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3970 break; 3971 } 3972 3973 ibmvfc_free_event(evt); 3974 wake_up(&vhost->work_wait_q); 3975 } 3976 3977 /** 3978 * ibmvfc_discover_targets - Send Discover Targets MAD 3979 * @vhost: ibmvfc host struct 3980 * 3981 **/ 3982 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3983 { 3984 struct ibmvfc_discover_targets *mad; 3985 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3986 3987 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3988 mad = &evt->iu.discover_targets; 3989 memset(mad, 0, sizeof(*mad)); 3990 mad->common.version = cpu_to_be32(1); 3991 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); 3992 mad->common.length = cpu_to_be16(sizeof(*mad)); 3993 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz); 3994 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma); 3995 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz); 3996 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3997 3998 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3999 ibmvfc_dbg(vhost, "Sent discover targets\n"); 4000 else 4001 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4002 } 4003 4004 /** 4005 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 4006 * @evt: ibmvfc event struct 4007 * 4008 **/ 4009 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 4010 { 4011 struct ibmvfc_host *vhost = evt->vhost; 4012 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); 4013 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 4014 unsigned int npiv_max_sectors; 4015 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4016 4017 switch (mad_status) { 4018 case IBMVFC_MAD_SUCCESS: 4019 ibmvfc_free_event(evt); 4020 break; 4021 case IBMVFC_MAD_FAILED: 4022 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4023 level += ibmvfc_retry_host_init(vhost); 4024 else 4025 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4026 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 4027 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4028 rsp->status, rsp->error); 4029 ibmvfc_free_event(evt); 4030 return; 4031 case IBMVFC_MAD_CRQ_ERROR: 4032 ibmvfc_retry_host_init(vhost); 4033 case IBMVFC_MAD_DRIVER_FAILED: 4034 ibmvfc_free_event(evt); 4035 return; 4036 default: 4037 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 4038 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4039 ibmvfc_free_event(evt); 4040 return; 4041 } 4042 4043 vhost->client_migrated = 0; 4044 4045 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { 4046 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 4047 rsp->flags); 4048 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4049 wake_up(&vhost->work_wait_q); 4050 return; 4051 } 4052 4053 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { 4054 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 4055 rsp->max_cmds); 4056 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4057 wake_up(&vhost->work_wait_q); 4058 return; 4059 } 4060 4061 vhost->logged_in = 1; 4062 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); 4063 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 4064 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 4065 rsp->drc_name, npiv_max_sectors); 4066 4067 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); 4068 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); 4069 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); 4070 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); 4071 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 4072 fc_host_supported_classes(vhost->host) = 0; 4073 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) 4074 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 4075 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) 4076 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 4077 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) 4078 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 4079 fc_host_maxframe_size(vhost->host) = 4080 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; 4081 4082 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; 4083 vhost->host->max_sectors = npiv_max_sectors; 4084 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4085 wake_up(&vhost->work_wait_q); 4086 } 4087 4088 /** 4089 * ibmvfc_npiv_login - Sends NPIV login 4090 * @vhost: ibmvfc host struct 4091 * 4092 **/ 4093 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 4094 { 4095 struct ibmvfc_npiv_login_mad *mad; 4096 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4097 4098 ibmvfc_gather_partition_info(vhost); 4099 ibmvfc_set_login_info(vhost); 4100 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 4101 4102 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 4103 mad = &evt->iu.npiv_login; 4104 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 4105 mad->common.version = cpu_to_be32(1); 4106 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); 4107 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); 4108 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); 4109 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); 4110 4111 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4112 4113 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4114 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 4115 else 4116 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4117 }; 4118 4119 /** 4120 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 4121 * @vhost: ibmvfc host struct 4122 * 4123 **/ 4124 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 4125 { 4126 struct ibmvfc_host *vhost = evt->vhost; 4127 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); 4128 4129 ibmvfc_free_event(evt); 4130 4131 switch (mad_status) { 4132 case IBMVFC_MAD_SUCCESS: 4133 if (list_empty(&vhost->sent) && 4134 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 4135 ibmvfc_init_host(vhost); 4136 return; 4137 } 4138 break; 4139 case IBMVFC_MAD_FAILED: 4140 case IBMVFC_MAD_NOT_SUPPORTED: 4141 case IBMVFC_MAD_CRQ_ERROR: 4142 case IBMVFC_MAD_DRIVER_FAILED: 4143 default: 4144 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 4145 break; 4146 } 4147 4148 ibmvfc_hard_reset_host(vhost); 4149 } 4150 4151 /** 4152 * ibmvfc_npiv_logout - Issue an NPIV Logout 4153 * @vhost: ibmvfc host struct 4154 * 4155 **/ 4156 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 4157 { 4158 struct ibmvfc_npiv_logout_mad *mad; 4159 struct ibmvfc_event *evt; 4160 4161 evt = ibmvfc_get_event(vhost); 4162 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 4163 4164 mad = &evt->iu.npiv_logout; 4165 memset(mad, 0, sizeof(*mad)); 4166 mad->common.version = cpu_to_be32(1); 4167 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); 4168 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); 4169 4170 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 4171 4172 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4173 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 4174 else 4175 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4176 } 4177 4178 /** 4179 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 4180 * @vhost: ibmvfc host struct 4181 * 4182 * Returns: 4183 * 1 if work to do / 0 if not 4184 **/ 4185 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 4186 { 4187 struct ibmvfc_target *tgt; 4188 4189 list_for_each_entry(tgt, &vhost->targets, queue) { 4190 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 4191 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4192 return 1; 4193 } 4194 4195 return 0; 4196 } 4197 4198 /** 4199 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 4200 * @vhost: ibmvfc host struct 4201 * 4202 * Returns: 4203 * 1 if work to do / 0 if not 4204 **/ 4205 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4206 { 4207 struct ibmvfc_target *tgt; 4208 4209 if (kthread_should_stop()) 4210 return 1; 4211 switch (vhost->action) { 4212 case IBMVFC_HOST_ACTION_NONE: 4213 case IBMVFC_HOST_ACTION_INIT_WAIT: 4214 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4215 return 0; 4216 case IBMVFC_HOST_ACTION_TGT_INIT: 4217 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4218 if (vhost->discovery_threads == disc_threads) 4219 return 0; 4220 list_for_each_entry(tgt, &vhost->targets, queue) 4221 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 4222 return 1; 4223 list_for_each_entry(tgt, &vhost->targets, queue) 4224 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4225 return 0; 4226 return 1; 4227 case IBMVFC_HOST_ACTION_LOGO: 4228 case IBMVFC_HOST_ACTION_INIT: 4229 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4230 case IBMVFC_HOST_ACTION_TGT_DEL: 4231 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4232 case IBMVFC_HOST_ACTION_QUERY: 4233 case IBMVFC_HOST_ACTION_RESET: 4234 case IBMVFC_HOST_ACTION_REENABLE: 4235 default: 4236 break; 4237 } 4238 4239 return 1; 4240 } 4241 4242 /** 4243 * ibmvfc_work_to_do - Is there task level work to do? 4244 * @vhost: ibmvfc host struct 4245 * 4246 * Returns: 4247 * 1 if work to do / 0 if not 4248 **/ 4249 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4250 { 4251 unsigned long flags; 4252 int rc; 4253 4254 spin_lock_irqsave(vhost->host->host_lock, flags); 4255 rc = __ibmvfc_work_to_do(vhost); 4256 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4257 return rc; 4258 } 4259 4260 /** 4261 * ibmvfc_log_ae - Log async events if necessary 4262 * @vhost: ibmvfc host struct 4263 * @events: events to log 4264 * 4265 **/ 4266 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 4267 { 4268 if (events & IBMVFC_AE_RSCN) 4269 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 4270 if ((events & IBMVFC_AE_LINKDOWN) && 4271 vhost->state >= IBMVFC_HALTED) 4272 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 4273 if ((events & IBMVFC_AE_LINKUP) && 4274 vhost->state == IBMVFC_INITIALIZING) 4275 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 4276 } 4277 4278 /** 4279 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 4280 * @tgt: ibmvfc target struct 4281 * 4282 **/ 4283 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 4284 { 4285 struct ibmvfc_host *vhost = tgt->vhost; 4286 struct fc_rport *rport; 4287 unsigned long flags; 4288 4289 tgt_dbg(tgt, "Adding rport\n"); 4290 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 4291 spin_lock_irqsave(vhost->host->host_lock, flags); 4292 4293 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4294 tgt_dbg(tgt, "Deleting rport\n"); 4295 list_del(&tgt->queue); 4296 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4297 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4298 fc_remote_port_delete(rport); 4299 del_timer_sync(&tgt->timer); 4300 kref_put(&tgt->kref, ibmvfc_release_tgt); 4301 return; 4302 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 4303 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4304 return; 4305 } 4306 4307 if (rport) { 4308 tgt_dbg(tgt, "rport add succeeded\n"); 4309 tgt->rport = rport; 4310 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; 4311 rport->supported_classes = 0; 4312 tgt->target_id = rport->scsi_target_id; 4313 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) 4314 rport->supported_classes |= FC_COS_CLASS1; 4315 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) 4316 rport->supported_classes |= FC_COS_CLASS2; 4317 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) 4318 rport->supported_classes |= FC_COS_CLASS3; 4319 if (rport->rqst_q) 4320 blk_queue_max_segments(rport->rqst_q, 1); 4321 } else 4322 tgt_dbg(tgt, "rport add failed\n"); 4323 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4324 } 4325 4326 /** 4327 * ibmvfc_do_work - Do task level work 4328 * @vhost: ibmvfc host struct 4329 * 4330 **/ 4331 static void ibmvfc_do_work(struct ibmvfc_host *vhost) 4332 { 4333 struct ibmvfc_target *tgt; 4334 unsigned long flags; 4335 struct fc_rport *rport; 4336 int rc; 4337 4338 ibmvfc_log_ae(vhost, vhost->events_to_log); 4339 spin_lock_irqsave(vhost->host->host_lock, flags); 4340 vhost->events_to_log = 0; 4341 switch (vhost->action) { 4342 case IBMVFC_HOST_ACTION_NONE: 4343 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4344 case IBMVFC_HOST_ACTION_INIT_WAIT: 4345 break; 4346 case IBMVFC_HOST_ACTION_RESET: 4347 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4348 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4349 rc = ibmvfc_reset_crq(vhost); 4350 spin_lock_irqsave(vhost->host->host_lock, flags); 4351 if (rc == H_CLOSED) 4352 vio_enable_interrupts(to_vio_dev(vhost->dev)); 4353 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 4354 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 4355 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4356 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 4357 } 4358 break; 4359 case IBMVFC_HOST_ACTION_REENABLE: 4360 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4361 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4362 rc = ibmvfc_reenable_crq_queue(vhost); 4363 spin_lock_irqsave(vhost->host->host_lock, flags); 4364 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 4365 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4366 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 4367 } 4368 break; 4369 case IBMVFC_HOST_ACTION_LOGO: 4370 vhost->job_step(vhost); 4371 break; 4372 case IBMVFC_HOST_ACTION_INIT: 4373 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 4374 if (vhost->delay_init) { 4375 vhost->delay_init = 0; 4376 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4377 ssleep(15); 4378 return; 4379 } else 4380 vhost->job_step(vhost); 4381 break; 4382 case IBMVFC_HOST_ACTION_QUERY: 4383 list_for_each_entry(tgt, &vhost->targets, queue) 4384 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 4385 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 4386 break; 4387 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4388 list_for_each_entry(tgt, &vhost->targets, queue) { 4389 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4390 tgt->job_step(tgt); 4391 break; 4392 } 4393 } 4394 4395 if (!ibmvfc_dev_init_to_do(vhost)) 4396 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 4397 break; 4398 case IBMVFC_HOST_ACTION_TGT_DEL: 4399 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4400 list_for_each_entry(tgt, &vhost->targets, queue) { 4401 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4402 tgt_dbg(tgt, "Deleting rport\n"); 4403 rport = tgt->rport; 4404 tgt->rport = NULL; 4405 list_del(&tgt->queue); 4406 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4407 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4408 if (rport) 4409 fc_remote_port_delete(rport); 4410 del_timer_sync(&tgt->timer); 4411 kref_put(&tgt->kref, ibmvfc_release_tgt); 4412 return; 4413 } 4414 } 4415 4416 if (vhost->state == IBMVFC_INITIALIZING) { 4417 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 4418 if (vhost->reinit) { 4419 vhost->reinit = 0; 4420 scsi_block_requests(vhost->host); 4421 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4422 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4423 } else { 4424 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 4425 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4426 wake_up(&vhost->init_wait_q); 4427 schedule_work(&vhost->rport_add_work_q); 4428 vhost->init_retries = 0; 4429 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4430 scsi_unblock_requests(vhost->host); 4431 } 4432 4433 return; 4434 } else { 4435 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 4436 vhost->job_step = ibmvfc_discover_targets; 4437 } 4438 } else { 4439 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4440 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4441 scsi_unblock_requests(vhost->host); 4442 wake_up(&vhost->init_wait_q); 4443 return; 4444 } 4445 break; 4446 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4447 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4448 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4449 ibmvfc_alloc_targets(vhost); 4450 spin_lock_irqsave(vhost->host->host_lock, flags); 4451 break; 4452 case IBMVFC_HOST_ACTION_TGT_INIT: 4453 list_for_each_entry(tgt, &vhost->targets, queue) { 4454 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4455 tgt->job_step(tgt); 4456 break; 4457 } 4458 } 4459 4460 if (!ibmvfc_dev_init_to_do(vhost)) 4461 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4462 break; 4463 default: 4464 break; 4465 } 4466 4467 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4468 } 4469 4470 /** 4471 * ibmvfc_work - Do task level work 4472 * @data: ibmvfc host struct 4473 * 4474 * Returns: 4475 * zero 4476 **/ 4477 static int ibmvfc_work(void *data) 4478 { 4479 struct ibmvfc_host *vhost = data; 4480 int rc; 4481 4482 set_user_nice(current, MIN_NICE); 4483 4484 while (1) { 4485 rc = wait_event_interruptible(vhost->work_wait_q, 4486 ibmvfc_work_to_do(vhost)); 4487 4488 BUG_ON(rc); 4489 4490 if (kthread_should_stop()) 4491 break; 4492 4493 ibmvfc_do_work(vhost); 4494 } 4495 4496 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4497 return 0; 4498 } 4499 4500 /** 4501 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4502 * @vhost: ibmvfc host struct 4503 * 4504 * Allocates a page for messages, maps it for dma, and registers 4505 * the crq with the hypervisor. 4506 * 4507 * Return value: 4508 * zero on success / other on failure 4509 **/ 4510 static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4511 { 4512 int rc, retrc = -ENOMEM; 4513 struct device *dev = vhost->dev; 4514 struct vio_dev *vdev = to_vio_dev(dev); 4515 struct ibmvfc_crq_queue *crq = &vhost->crq; 4516 4517 ENTER; 4518 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4519 4520 if (!crq->msgs) 4521 return -ENOMEM; 4522 4523 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4524 crq->msg_token = dma_map_single(dev, crq->msgs, 4525 PAGE_SIZE, DMA_BIDIRECTIONAL); 4526 4527 if (dma_mapping_error(dev, crq->msg_token)) 4528 goto map_failed; 4529 4530 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4531 crq->msg_token, PAGE_SIZE); 4532 4533 if (rc == H_RESOURCE) 4534 /* maybe kexecing and resource is busy. try a reset */ 4535 retrc = rc = ibmvfc_reset_crq(vhost); 4536 4537 if (rc == H_CLOSED) 4538 dev_warn(dev, "Partner adapter not ready\n"); 4539 else if (rc) { 4540 dev_warn(dev, "Error %d opening adapter\n", rc); 4541 goto reg_crq_failed; 4542 } 4543 4544 retrc = 0; 4545 4546 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4547 4548 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4549 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4550 goto req_irq_failed; 4551 } 4552 4553 if ((rc = vio_enable_interrupts(vdev))) { 4554 dev_err(dev, "Error %d enabling interrupts\n", rc); 4555 goto req_irq_failed; 4556 } 4557 4558 crq->cur = 0; 4559 LEAVE; 4560 return retrc; 4561 4562 req_irq_failed: 4563 tasklet_kill(&vhost->tasklet); 4564 do { 4565 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4566 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4567 reg_crq_failed: 4568 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4569 map_failed: 4570 free_page((unsigned long)crq->msgs); 4571 return retrc; 4572 } 4573 4574 /** 4575 * ibmvfc_free_mem - Free memory for vhost 4576 * @vhost: ibmvfc host struct 4577 * 4578 * Return value: 4579 * none 4580 **/ 4581 static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4582 { 4583 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4584 4585 ENTER; 4586 mempool_destroy(vhost->tgt_pool); 4587 kfree(vhost->trace); 4588 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4589 vhost->disc_buf_dma); 4590 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4591 vhost->login_buf, vhost->login_buf_dma); 4592 dma_pool_destroy(vhost->sg_pool); 4593 dma_unmap_single(vhost->dev, async_q->msg_token, 4594 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4595 free_page((unsigned long)async_q->msgs); 4596 LEAVE; 4597 } 4598 4599 /** 4600 * ibmvfc_alloc_mem - Allocate memory for vhost 4601 * @vhost: ibmvfc host struct 4602 * 4603 * Return value: 4604 * 0 on success / non-zero on failure 4605 **/ 4606 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4607 { 4608 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4609 struct device *dev = vhost->dev; 4610 4611 ENTER; 4612 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4613 if (!async_q->msgs) { 4614 dev_err(dev, "Couldn't allocate async queue.\n"); 4615 goto nomem; 4616 } 4617 4618 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4619 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4620 async_q->size * sizeof(*async_q->msgs), 4621 DMA_BIDIRECTIONAL); 4622 4623 if (dma_mapping_error(dev, async_q->msg_token)) { 4624 dev_err(dev, "Failed to map async queue\n"); 4625 goto free_async_crq; 4626 } 4627 4628 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4629 SG_ALL * sizeof(struct srp_direct_buf), 4630 sizeof(struct srp_direct_buf), 0); 4631 4632 if (!vhost->sg_pool) { 4633 dev_err(dev, "Failed to allocate sg pool\n"); 4634 goto unmap_async_crq; 4635 } 4636 4637 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4638 &vhost->login_buf_dma, GFP_KERNEL); 4639 4640 if (!vhost->login_buf) { 4641 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4642 goto free_sg_pool; 4643 } 4644 4645 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4646 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4647 &vhost->disc_buf_dma, GFP_KERNEL); 4648 4649 if (!vhost->disc_buf) { 4650 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4651 goto free_login_buffer; 4652 } 4653 4654 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4655 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4656 4657 if (!vhost->trace) 4658 goto free_disc_buffer; 4659 4660 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4661 sizeof(struct ibmvfc_target)); 4662 4663 if (!vhost->tgt_pool) { 4664 dev_err(dev, "Couldn't allocate target memory pool\n"); 4665 goto free_trace; 4666 } 4667 4668 LEAVE; 4669 return 0; 4670 4671 free_trace: 4672 kfree(vhost->trace); 4673 free_disc_buffer: 4674 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4675 vhost->disc_buf_dma); 4676 free_login_buffer: 4677 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4678 vhost->login_buf, vhost->login_buf_dma); 4679 free_sg_pool: 4680 dma_pool_destroy(vhost->sg_pool); 4681 unmap_async_crq: 4682 dma_unmap_single(dev, async_q->msg_token, 4683 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4684 free_async_crq: 4685 free_page((unsigned long)async_q->msgs); 4686 nomem: 4687 LEAVE; 4688 return -ENOMEM; 4689 } 4690 4691 /** 4692 * ibmvfc_rport_add_thread - Worker thread for rport adds 4693 * @work: work struct 4694 * 4695 **/ 4696 static void ibmvfc_rport_add_thread(struct work_struct *work) 4697 { 4698 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4699 rport_add_work_q); 4700 struct ibmvfc_target *tgt; 4701 struct fc_rport *rport; 4702 unsigned long flags; 4703 int did_work; 4704 4705 ENTER; 4706 spin_lock_irqsave(vhost->host->host_lock, flags); 4707 do { 4708 did_work = 0; 4709 if (vhost->state != IBMVFC_ACTIVE) 4710 break; 4711 4712 list_for_each_entry(tgt, &vhost->targets, queue) { 4713 if (tgt->add_rport) { 4714 did_work = 1; 4715 tgt->add_rport = 0; 4716 kref_get(&tgt->kref); 4717 rport = tgt->rport; 4718 if (!rport) { 4719 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4720 ibmvfc_tgt_add_rport(tgt); 4721 } else if (get_device(&rport->dev)) { 4722 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4723 tgt_dbg(tgt, "Setting rport roles\n"); 4724 fc_remote_port_rolechg(rport, tgt->ids.roles); 4725 put_device(&rport->dev); 4726 } else { 4727 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4728 } 4729 4730 kref_put(&tgt->kref, ibmvfc_release_tgt); 4731 spin_lock_irqsave(vhost->host->host_lock, flags); 4732 break; 4733 } 4734 } 4735 } while(did_work); 4736 4737 if (vhost->state == IBMVFC_ACTIVE) 4738 vhost->scan_complete = 1; 4739 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4740 LEAVE; 4741 } 4742 4743 /** 4744 * ibmvfc_probe - Adapter hot plug add entry point 4745 * @vdev: vio device struct 4746 * @id: vio device id struct 4747 * 4748 * Return value: 4749 * 0 on success / non-zero on failure 4750 **/ 4751 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4752 { 4753 struct ibmvfc_host *vhost; 4754 struct Scsi_Host *shost; 4755 struct device *dev = &vdev->dev; 4756 int rc = -ENOMEM; 4757 4758 ENTER; 4759 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4760 if (!shost) { 4761 dev_err(dev, "Couldn't allocate host data\n"); 4762 goto out; 4763 } 4764 4765 shost->transportt = ibmvfc_transport_template; 4766 shost->can_queue = max_requests; 4767 shost->max_lun = max_lun; 4768 shost->max_id = max_targets; 4769 shost->max_sectors = IBMVFC_MAX_SECTORS; 4770 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4771 shost->unique_id = shost->host_no; 4772 4773 vhost = shost_priv(shost); 4774 INIT_LIST_HEAD(&vhost->sent); 4775 INIT_LIST_HEAD(&vhost->free); 4776 INIT_LIST_HEAD(&vhost->targets); 4777 sprintf(vhost->name, IBMVFC_NAME); 4778 vhost->host = shost; 4779 vhost->dev = dev; 4780 vhost->partition_number = -1; 4781 vhost->log_level = log_level; 4782 vhost->task_set = 1; 4783 strcpy(vhost->partition_name, "UNKNOWN"); 4784 init_waitqueue_head(&vhost->work_wait_q); 4785 init_waitqueue_head(&vhost->init_wait_q); 4786 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4787 mutex_init(&vhost->passthru_mutex); 4788 4789 if ((rc = ibmvfc_alloc_mem(vhost))) 4790 goto free_scsi_host; 4791 4792 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4793 shost->host_no); 4794 4795 if (IS_ERR(vhost->work_thread)) { 4796 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4797 PTR_ERR(vhost->work_thread)); 4798 goto free_host_mem; 4799 } 4800 4801 if ((rc = ibmvfc_init_crq(vhost))) { 4802 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4803 goto kill_kthread; 4804 } 4805 4806 if ((rc = ibmvfc_init_event_pool(vhost))) { 4807 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4808 goto release_crq; 4809 } 4810 4811 if ((rc = scsi_add_host(shost, dev))) 4812 goto release_event_pool; 4813 4814 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 4815 4816 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4817 &ibmvfc_trace_attr))) { 4818 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4819 goto remove_shost; 4820 } 4821 4822 if (shost_to_fc_host(shost)->rqst_q) 4823 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 4824 dev_set_drvdata(dev, vhost); 4825 spin_lock(&ibmvfc_driver_lock); 4826 list_add_tail(&vhost->queue, &ibmvfc_head); 4827 spin_unlock(&ibmvfc_driver_lock); 4828 4829 ibmvfc_send_crq_init(vhost); 4830 scsi_scan_host(shost); 4831 return 0; 4832 4833 remove_shost: 4834 scsi_remove_host(shost); 4835 release_event_pool: 4836 ibmvfc_free_event_pool(vhost); 4837 release_crq: 4838 ibmvfc_release_crq_queue(vhost); 4839 kill_kthread: 4840 kthread_stop(vhost->work_thread); 4841 free_host_mem: 4842 ibmvfc_free_mem(vhost); 4843 free_scsi_host: 4844 scsi_host_put(shost); 4845 out: 4846 LEAVE; 4847 return rc; 4848 } 4849 4850 /** 4851 * ibmvfc_remove - Adapter hot plug remove entry point 4852 * @vdev: vio device struct 4853 * 4854 * Return value: 4855 * 0 4856 **/ 4857 static int ibmvfc_remove(struct vio_dev *vdev) 4858 { 4859 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4860 unsigned long flags; 4861 4862 ENTER; 4863 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4864 4865 spin_lock_irqsave(vhost->host->host_lock, flags); 4866 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4867 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4868 4869 ibmvfc_wait_while_resetting(vhost); 4870 ibmvfc_release_crq_queue(vhost); 4871 kthread_stop(vhost->work_thread); 4872 fc_remove_host(vhost->host); 4873 scsi_remove_host(vhost->host); 4874 4875 spin_lock_irqsave(vhost->host->host_lock, flags); 4876 ibmvfc_purge_requests(vhost, DID_ERROR); 4877 ibmvfc_free_event_pool(vhost); 4878 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4879 4880 ibmvfc_free_mem(vhost); 4881 spin_lock(&ibmvfc_driver_lock); 4882 list_del(&vhost->queue); 4883 spin_unlock(&ibmvfc_driver_lock); 4884 scsi_host_put(vhost->host); 4885 LEAVE; 4886 return 0; 4887 } 4888 4889 /** 4890 * ibmvfc_resume - Resume from suspend 4891 * @dev: device struct 4892 * 4893 * We may have lost an interrupt across suspend/resume, so kick the 4894 * interrupt handler 4895 * 4896 */ 4897 static int ibmvfc_resume(struct device *dev) 4898 { 4899 unsigned long flags; 4900 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 4901 struct vio_dev *vdev = to_vio_dev(dev); 4902 4903 spin_lock_irqsave(vhost->host->host_lock, flags); 4904 vio_disable_interrupts(vdev); 4905 tasklet_schedule(&vhost->tasklet); 4906 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4907 return 0; 4908 } 4909 4910 /** 4911 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4912 * @vdev: vio device struct 4913 * 4914 * Return value: 4915 * Number of bytes the driver will need to DMA map at the same time in 4916 * order to perform well. 4917 */ 4918 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4919 { 4920 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4921 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4922 } 4923 4924 static const struct vio_device_id ibmvfc_device_table[] = { 4925 {"fcp", "IBM,vfc-client"}, 4926 { "", "" } 4927 }; 4928 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4929 4930 static const struct dev_pm_ops ibmvfc_pm_ops = { 4931 .resume = ibmvfc_resume 4932 }; 4933 4934 static struct vio_driver ibmvfc_driver = { 4935 .id_table = ibmvfc_device_table, 4936 .probe = ibmvfc_probe, 4937 .remove = ibmvfc_remove, 4938 .get_desired_dma = ibmvfc_get_desired_dma, 4939 .name = IBMVFC_NAME, 4940 .pm = &ibmvfc_pm_ops, 4941 }; 4942 4943 static struct fc_function_template ibmvfc_transport_functions = { 4944 .show_host_fabric_name = 1, 4945 .show_host_node_name = 1, 4946 .show_host_port_name = 1, 4947 .show_host_supported_classes = 1, 4948 .show_host_port_type = 1, 4949 .show_host_port_id = 1, 4950 .show_host_maxframe_size = 1, 4951 4952 .get_host_port_state = ibmvfc_get_host_port_state, 4953 .show_host_port_state = 1, 4954 4955 .get_host_speed = ibmvfc_get_host_speed, 4956 .show_host_speed = 1, 4957 4958 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4959 .terminate_rport_io = ibmvfc_terminate_rport_io, 4960 4961 .show_rport_maxframe_size = 1, 4962 .show_rport_supported_classes = 1, 4963 4964 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4965 .show_rport_dev_loss_tmo = 1, 4966 4967 .get_starget_node_name = ibmvfc_get_starget_node_name, 4968 .show_starget_node_name = 1, 4969 4970 .get_starget_port_name = ibmvfc_get_starget_port_name, 4971 .show_starget_port_name = 1, 4972 4973 .get_starget_port_id = ibmvfc_get_starget_port_id, 4974 .show_starget_port_id = 1, 4975 4976 .bsg_request = ibmvfc_bsg_request, 4977 .bsg_timeout = ibmvfc_bsg_timeout, 4978 }; 4979 4980 /** 4981 * ibmvfc_module_init - Initialize the ibmvfc module 4982 * 4983 * Return value: 4984 * 0 on success / other on failure 4985 **/ 4986 static int __init ibmvfc_module_init(void) 4987 { 4988 int rc; 4989 4990 if (!firmware_has_feature(FW_FEATURE_VIO)) 4991 return -ENODEV; 4992 4993 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4994 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4995 4996 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4997 if (!ibmvfc_transport_template) 4998 return -ENOMEM; 4999 5000 rc = vio_register_driver(&ibmvfc_driver); 5001 if (rc) 5002 fc_release_transport(ibmvfc_transport_template); 5003 return rc; 5004 } 5005 5006 /** 5007 * ibmvfc_module_exit - Teardown the ibmvfc module 5008 * 5009 * Return value: 5010 * nothing 5011 **/ 5012 static void __exit ibmvfc_module_exit(void) 5013 { 5014 vio_unregister_driver(&ibmvfc_driver); 5015 fc_release_transport(ibmvfc_transport_template); 5016 } 5017 5018 module_init(ibmvfc_module_init); 5019 module_exit(ibmvfc_module_exit); 5020