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 ibmvfc_event *evt) 1397 { 1398 struct ibmvfc_host *vhost = evt->vhost; 1399 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1400 ibmvfc_reset_host(vhost); 1401 } 1402 1403 /** 1404 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1405 * @evt: event to be sent 1406 * @vhost: ibmvfc host struct 1407 * @timeout: timeout in seconds - 0 means do not time command 1408 * 1409 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1410 **/ 1411 static int ibmvfc_send_event(struct ibmvfc_event *evt, 1412 struct ibmvfc_host *vhost, unsigned long timeout) 1413 { 1414 __be64 *crq_as_u64 = (__be64 *) &evt->crq; 1415 int rc; 1416 1417 /* Copy the IU into the transfer area */ 1418 *evt->xfer_iu = evt->iu; 1419 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1420 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); 1421 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1422 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); 1423 else 1424 BUG(); 1425 1426 list_add_tail(&evt->queue, &vhost->sent); 1427 init_timer(&evt->timer); 1428 1429 if (timeout) { 1430 evt->timer.data = (unsigned long) evt; 1431 evt->timer.expires = jiffies + (timeout * HZ); 1432 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; 1433 add_timer(&evt->timer); 1434 } 1435 1436 mb(); 1437 1438 if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), 1439 be64_to_cpu(crq_as_u64[1])))) { 1440 list_del(&evt->queue); 1441 del_timer(&evt->timer); 1442 1443 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1444 * Firmware will send a CRQ with a transport event (0xFF) to 1445 * tell this client what has happened to the transport. This 1446 * will be handled in ibmvfc_handle_crq() 1447 */ 1448 if (rc == H_CLOSED) { 1449 if (printk_ratelimit()) 1450 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1451 if (evt->cmnd) 1452 scsi_dma_unmap(evt->cmnd); 1453 ibmvfc_free_event(evt); 1454 return SCSI_MLQUEUE_HOST_BUSY; 1455 } 1456 1457 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1458 if (evt->cmnd) { 1459 evt->cmnd->result = DID_ERROR << 16; 1460 evt->done = ibmvfc_scsi_eh_done; 1461 } else 1462 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); 1463 1464 evt->done(evt); 1465 } else 1466 ibmvfc_trc_start(evt); 1467 1468 return 0; 1469 } 1470 1471 /** 1472 * ibmvfc_log_error - Log an error for the failed command if appropriate 1473 * @evt: ibmvfc event to log 1474 * 1475 **/ 1476 static void ibmvfc_log_error(struct ibmvfc_event *evt) 1477 { 1478 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1479 struct ibmvfc_host *vhost = evt->vhost; 1480 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1481 struct scsi_cmnd *cmnd = evt->cmnd; 1482 const char *err = unknown_error; 1483 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 1484 int logerr = 0; 1485 int rsp_code = 0; 1486 1487 if (index >= 0) { 1488 logerr = cmd_status[index].log; 1489 err = cmd_status[index].name; 1490 } 1491 1492 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1493 return; 1494 1495 if (rsp->flags & FCP_RSP_LEN_VALID) 1496 rsp_code = rsp->data.info.rsp_code; 1497 1498 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1499 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1500 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1501 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1502 } 1503 1504 /** 1505 * ibmvfc_relogin - Log back into the specified device 1506 * @sdev: scsi device struct 1507 * 1508 **/ 1509 static void ibmvfc_relogin(struct scsi_device *sdev) 1510 { 1511 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1512 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1513 struct ibmvfc_target *tgt; 1514 1515 list_for_each_entry(tgt, &vhost->targets, queue) { 1516 if (rport == tgt->rport) { 1517 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 1518 break; 1519 } 1520 } 1521 1522 ibmvfc_reinit_host(vhost); 1523 } 1524 1525 /** 1526 * ibmvfc_scsi_done - Handle responses from commands 1527 * @evt: ibmvfc event to be handled 1528 * 1529 * Used as a callback when sending scsi cmds. 1530 **/ 1531 static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1532 { 1533 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1534 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1535 struct scsi_cmnd *cmnd = evt->cmnd; 1536 u32 rsp_len = 0; 1537 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); 1538 1539 if (cmnd) { 1540 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) 1541 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); 1542 else if (rsp->flags & FCP_RESID_UNDER) 1543 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); 1544 else 1545 scsi_set_resid(cmnd, 0); 1546 1547 if (vfc_cmd->status) { 1548 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1549 1550 if (rsp->flags & FCP_RSP_LEN_VALID) 1551 rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 1552 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1553 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1554 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1555 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1556 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && 1557 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) 1558 ibmvfc_relogin(cmnd->device); 1559 1560 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1561 cmnd->result = (DID_ERROR << 16); 1562 1563 ibmvfc_log_error(evt); 1564 } 1565 1566 if (!cmnd->result && 1567 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1568 cmnd->result = (DID_ERROR << 16); 1569 1570 scsi_dma_unmap(cmnd); 1571 cmnd->scsi_done(cmnd); 1572 } 1573 1574 if (evt->eh_comp) 1575 complete(evt->eh_comp); 1576 1577 ibmvfc_free_event(evt); 1578 } 1579 1580 /** 1581 * ibmvfc_host_chkready - Check if the host can accept commands 1582 * @vhost: struct ibmvfc host 1583 * 1584 * Returns: 1585 * 1 if host can accept command / 0 if not 1586 **/ 1587 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1588 { 1589 int result = 0; 1590 1591 switch (vhost->state) { 1592 case IBMVFC_LINK_DEAD: 1593 case IBMVFC_HOST_OFFLINE: 1594 result = DID_NO_CONNECT << 16; 1595 break; 1596 case IBMVFC_NO_CRQ: 1597 case IBMVFC_INITIALIZING: 1598 case IBMVFC_HALTED: 1599 case IBMVFC_LINK_DOWN: 1600 result = DID_REQUEUE << 16; 1601 break; 1602 case IBMVFC_ACTIVE: 1603 result = 0; 1604 break; 1605 }; 1606 1607 return result; 1608 } 1609 1610 /** 1611 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1612 * @cmnd: struct scsi_cmnd to be executed 1613 * @done: Callback function to be called when cmnd is completed 1614 * 1615 * Returns: 1616 * 0 on success / other on failure 1617 **/ 1618 static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd, 1619 void (*done) (struct scsi_cmnd *)) 1620 { 1621 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1622 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1623 struct ibmvfc_cmd *vfc_cmd; 1624 struct ibmvfc_event *evt; 1625 int rc; 1626 1627 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1628 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1629 cmnd->result = rc; 1630 done(cmnd); 1631 return 0; 1632 } 1633 1634 cmnd->result = (DID_OK << 16); 1635 evt = ibmvfc_get_event(vhost); 1636 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1637 evt->cmnd = cmnd; 1638 cmnd->scsi_done = done; 1639 vfc_cmd = &evt->iu.cmd; 1640 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1641 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 1642 vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp)); 1643 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1644 vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu)); 1645 vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp)); 1646 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata); 1647 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); 1648 vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); 1649 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1650 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1651 1652 if (cmnd->flags & SCMD_TAGGED) { 1653 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag); 1654 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1655 } 1656 1657 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1658 return ibmvfc_send_event(evt, vhost, 0); 1659 1660 ibmvfc_free_event(evt); 1661 if (rc == -ENOMEM) 1662 return SCSI_MLQUEUE_HOST_BUSY; 1663 1664 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1665 scmd_printk(KERN_ERR, cmnd, 1666 "Failed to map DMA buffer for command. rc=%d\n", rc); 1667 1668 cmnd->result = DID_ERROR << 16; 1669 done(cmnd); 1670 return 0; 1671 } 1672 1673 static DEF_SCSI_QCMD(ibmvfc_queuecommand) 1674 1675 /** 1676 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1677 * @evt: ibmvfc event struct 1678 * 1679 **/ 1680 static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1681 { 1682 /* copy the response back */ 1683 if (evt->sync_iu) 1684 *evt->sync_iu = *evt->xfer_iu; 1685 1686 complete(&evt->comp); 1687 } 1688 1689 /** 1690 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 1691 * @evt: struct ibmvfc_event 1692 * 1693 **/ 1694 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 1695 { 1696 struct ibmvfc_host *vhost = evt->vhost; 1697 1698 ibmvfc_free_event(evt); 1699 vhost->aborting_passthru = 0; 1700 dev_info(vhost->dev, "Passthru command cancelled\n"); 1701 } 1702 1703 /** 1704 * ibmvfc_bsg_timeout - Handle a BSG timeout 1705 * @job: struct bsg_job that timed out 1706 * 1707 * Returns: 1708 * 0 on success / other on failure 1709 **/ 1710 static int ibmvfc_bsg_timeout(struct bsg_job *job) 1711 { 1712 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 1713 unsigned long port_id = (unsigned long)job->dd_data; 1714 struct ibmvfc_event *evt; 1715 struct ibmvfc_tmf *tmf; 1716 unsigned long flags; 1717 int rc; 1718 1719 ENTER; 1720 spin_lock_irqsave(vhost->host->host_lock, flags); 1721 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 1722 __ibmvfc_reset_host(vhost); 1723 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1724 return 0; 1725 } 1726 1727 vhost->aborting_passthru = 1; 1728 evt = ibmvfc_get_event(vhost); 1729 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 1730 1731 tmf = &evt->iu.tmf; 1732 memset(tmf, 0, sizeof(*tmf)); 1733 tmf->common.version = cpu_to_be32(1); 1734 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 1735 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 1736 tmf->scsi_id = cpu_to_be64(port_id); 1737 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 1738 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); 1739 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1740 1741 if (rc != 0) { 1742 vhost->aborting_passthru = 0; 1743 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 1744 rc = -EIO; 1745 } else 1746 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 1747 port_id); 1748 1749 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1750 1751 LEAVE; 1752 return rc; 1753 } 1754 1755 /** 1756 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 1757 * @vhost: struct ibmvfc_host to send command 1758 * @port_id: port ID to send command 1759 * 1760 * Returns: 1761 * 0 on success / other on failure 1762 **/ 1763 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 1764 { 1765 struct ibmvfc_port_login *plogi; 1766 struct ibmvfc_target *tgt; 1767 struct ibmvfc_event *evt; 1768 union ibmvfc_iu rsp_iu; 1769 unsigned long flags; 1770 int rc = 0, issue_login = 1; 1771 1772 ENTER; 1773 spin_lock_irqsave(vhost->host->host_lock, flags); 1774 list_for_each_entry(tgt, &vhost->targets, queue) { 1775 if (tgt->scsi_id == port_id) { 1776 issue_login = 0; 1777 break; 1778 } 1779 } 1780 1781 if (!issue_login) 1782 goto unlock_out; 1783 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 1784 goto unlock_out; 1785 1786 evt = ibmvfc_get_event(vhost); 1787 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1788 plogi = &evt->iu.plogi; 1789 memset(plogi, 0, sizeof(*plogi)); 1790 plogi->common.version = cpu_to_be32(1); 1791 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 1792 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 1793 plogi->scsi_id = cpu_to_be64(port_id); 1794 evt->sync_iu = &rsp_iu; 1795 init_completion(&evt->comp); 1796 1797 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1798 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1799 1800 if (rc) 1801 return -EIO; 1802 1803 wait_for_completion(&evt->comp); 1804 1805 if (rsp_iu.plogi.common.status) 1806 rc = -EIO; 1807 1808 spin_lock_irqsave(vhost->host->host_lock, flags); 1809 ibmvfc_free_event(evt); 1810 unlock_out: 1811 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1812 LEAVE; 1813 return rc; 1814 } 1815 1816 /** 1817 * ibmvfc_bsg_request - Handle a BSG request 1818 * @job: struct bsg_job to be executed 1819 * 1820 * Returns: 1821 * 0 on success / other on failure 1822 **/ 1823 static int ibmvfc_bsg_request(struct bsg_job *job) 1824 { 1825 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 1826 struct fc_rport *rport = fc_bsg_to_rport(job); 1827 struct ibmvfc_passthru_mad *mad; 1828 struct ibmvfc_event *evt; 1829 union ibmvfc_iu rsp_iu; 1830 unsigned long flags, port_id = -1; 1831 struct fc_bsg_request *bsg_request = job->request; 1832 struct fc_bsg_reply *bsg_reply = job->reply; 1833 unsigned int code = bsg_request->msgcode; 1834 int rc = 0, req_seg, rsp_seg, issue_login = 0; 1835 u32 fc_flags, rsp_len; 1836 1837 ENTER; 1838 bsg_reply->reply_payload_rcv_len = 0; 1839 if (rport) 1840 port_id = rport->port_id; 1841 1842 switch (code) { 1843 case FC_BSG_HST_ELS_NOLOGIN: 1844 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) | 1845 (bsg_request->rqst_data.h_els.port_id[1] << 8) | 1846 bsg_request->rqst_data.h_els.port_id[2]; 1847 case FC_BSG_RPT_ELS: 1848 fc_flags = IBMVFC_FC_ELS; 1849 break; 1850 case FC_BSG_HST_CT: 1851 issue_login = 1; 1852 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) | 1853 (bsg_request->rqst_data.h_ct.port_id[1] << 8) | 1854 bsg_request->rqst_data.h_ct.port_id[2]; 1855 case FC_BSG_RPT_CT: 1856 fc_flags = IBMVFC_FC_CT_IU; 1857 break; 1858 default: 1859 return -ENOTSUPP; 1860 }; 1861 1862 if (port_id == -1) 1863 return -EINVAL; 1864 if (!mutex_trylock(&vhost->passthru_mutex)) 1865 return -EBUSY; 1866 1867 job->dd_data = (void *)port_id; 1868 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 1869 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1870 1871 if (!req_seg) { 1872 mutex_unlock(&vhost->passthru_mutex); 1873 return -ENOMEM; 1874 } 1875 1876 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 1877 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1878 1879 if (!rsp_seg) { 1880 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1881 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1882 mutex_unlock(&vhost->passthru_mutex); 1883 return -ENOMEM; 1884 } 1885 1886 if (req_seg > 1 || rsp_seg > 1) { 1887 rc = -EINVAL; 1888 goto out; 1889 } 1890 1891 if (issue_login) 1892 rc = ibmvfc_bsg_plogi(vhost, port_id); 1893 1894 spin_lock_irqsave(vhost->host->host_lock, flags); 1895 1896 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 1897 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1898 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1899 goto out; 1900 } 1901 1902 evt = ibmvfc_get_event(vhost); 1903 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1904 mad = &evt->iu.passthru; 1905 1906 memset(mad, 0, sizeof(*mad)); 1907 mad->common.version = cpu_to_be32(1); 1908 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 1909 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 1910 1911 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + 1912 offsetof(struct ibmvfc_passthru_mad, iu)); 1913 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 1914 1915 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); 1916 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); 1917 mad->iu.flags = cpu_to_be32(fc_flags); 1918 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 1919 1920 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); 1921 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); 1922 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); 1923 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); 1924 mad->iu.scsi_id = cpu_to_be64(port_id); 1925 mad->iu.tag = cpu_to_be64((u64)evt); 1926 rsp_len = be32_to_cpu(mad->iu.rsp.len); 1927 1928 evt->sync_iu = &rsp_iu; 1929 init_completion(&evt->comp); 1930 rc = ibmvfc_send_event(evt, vhost, 0); 1931 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1932 1933 if (rc) { 1934 rc = -EIO; 1935 goto out; 1936 } 1937 1938 wait_for_completion(&evt->comp); 1939 1940 if (rsp_iu.passthru.common.status) 1941 rc = -EIO; 1942 else 1943 bsg_reply->reply_payload_rcv_len = rsp_len; 1944 1945 spin_lock_irqsave(vhost->host->host_lock, flags); 1946 ibmvfc_free_event(evt); 1947 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1948 bsg_reply->result = rc; 1949 bsg_job_done(job, bsg_reply->result, 1950 bsg_reply->reply_payload_rcv_len); 1951 rc = 0; 1952 out: 1953 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1954 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1955 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 1956 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1957 mutex_unlock(&vhost->passthru_mutex); 1958 LEAVE; 1959 return rc; 1960 } 1961 1962 /** 1963 * ibmvfc_reset_device - Reset the device with the specified reset type 1964 * @sdev: scsi device to reset 1965 * @type: reset type 1966 * @desc: reset type description for log messages 1967 * 1968 * Returns: 1969 * 0 on success / other on failure 1970 **/ 1971 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1972 { 1973 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1974 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1975 struct ibmvfc_cmd *tmf; 1976 struct ibmvfc_event *evt = NULL; 1977 union ibmvfc_iu rsp_iu; 1978 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1979 int rsp_rc = -EBUSY; 1980 unsigned long flags; 1981 int rsp_code = 0; 1982 1983 spin_lock_irqsave(vhost->host->host_lock, flags); 1984 if (vhost->state == IBMVFC_ACTIVE) { 1985 evt = ibmvfc_get_event(vhost); 1986 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1987 1988 tmf = &evt->iu.cmd; 1989 memset(tmf, 0, sizeof(*tmf)); 1990 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 1991 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); 1992 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1993 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); 1994 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); 1995 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 1996 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); 1997 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1998 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 1999 tmf->iu.tmf_flags = type; 2000 evt->sync_iu = &rsp_iu; 2001 2002 init_completion(&evt->comp); 2003 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2004 } 2005 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2006 2007 if (rsp_rc != 0) { 2008 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 2009 desc, rsp_rc); 2010 return -EIO; 2011 } 2012 2013 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2014 wait_for_completion(&evt->comp); 2015 2016 if (rsp_iu.cmd.status) 2017 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2018 2019 if (rsp_code) { 2020 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2021 rsp_code = fc_rsp->data.info.rsp_code; 2022 2023 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2024 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, 2025 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2026 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2027 fc_rsp->scsi_status); 2028 rsp_rc = -EIO; 2029 } else 2030 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2031 2032 spin_lock_irqsave(vhost->host->host_lock, flags); 2033 ibmvfc_free_event(evt); 2034 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2035 return rsp_rc; 2036 } 2037 2038 /** 2039 * ibmvfc_match_rport - Match function for specified remote port 2040 * @evt: ibmvfc event struct 2041 * @device: device to match (rport) 2042 * 2043 * Returns: 2044 * 1 if event matches rport / 0 if event does not match rport 2045 **/ 2046 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2047 { 2048 struct fc_rport *cmd_rport; 2049 2050 if (evt->cmnd) { 2051 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2052 if (cmd_rport == rport) 2053 return 1; 2054 } 2055 return 0; 2056 } 2057 2058 /** 2059 * ibmvfc_match_target - Match function for specified target 2060 * @evt: ibmvfc event struct 2061 * @device: device to match (starget) 2062 * 2063 * Returns: 2064 * 1 if event matches starget / 0 if event does not match starget 2065 **/ 2066 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2067 { 2068 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2069 return 1; 2070 return 0; 2071 } 2072 2073 /** 2074 * ibmvfc_match_lun - Match function for specified LUN 2075 * @evt: ibmvfc event struct 2076 * @device: device to match (sdev) 2077 * 2078 * Returns: 2079 * 1 if event matches sdev / 0 if event does not match sdev 2080 **/ 2081 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2082 { 2083 if (evt->cmnd && evt->cmnd->device == device) 2084 return 1; 2085 return 0; 2086 } 2087 2088 /** 2089 * ibmvfc_wait_for_ops - Wait for ops to complete 2090 * @vhost: ibmvfc host struct 2091 * @device: device to match (starget or sdev) 2092 * @match: match function 2093 * 2094 * Returns: 2095 * SUCCESS / FAILED 2096 **/ 2097 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2098 int (*match) (struct ibmvfc_event *, void *)) 2099 { 2100 struct ibmvfc_event *evt; 2101 DECLARE_COMPLETION_ONSTACK(comp); 2102 int wait; 2103 unsigned long flags; 2104 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2105 2106 ENTER; 2107 do { 2108 wait = 0; 2109 spin_lock_irqsave(vhost->host->host_lock, flags); 2110 list_for_each_entry(evt, &vhost->sent, queue) { 2111 if (match(evt, device)) { 2112 evt->eh_comp = ∁ 2113 wait++; 2114 } 2115 } 2116 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2117 2118 if (wait) { 2119 timeout = wait_for_completion_timeout(&comp, timeout); 2120 2121 if (!timeout) { 2122 wait = 0; 2123 spin_lock_irqsave(vhost->host->host_lock, flags); 2124 list_for_each_entry(evt, &vhost->sent, queue) { 2125 if (match(evt, device)) { 2126 evt->eh_comp = NULL; 2127 wait++; 2128 } 2129 } 2130 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2131 if (wait) 2132 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2133 LEAVE; 2134 return wait ? FAILED : SUCCESS; 2135 } 2136 } 2137 } while (wait); 2138 2139 LEAVE; 2140 return SUCCESS; 2141 } 2142 2143 /** 2144 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2145 * @sdev: scsi device to cancel commands 2146 * @type: type of error recovery being performed 2147 * 2148 * This sends a cancel to the VIOS for the specified device. This does 2149 * NOT send any abort to the actual device. That must be done separately. 2150 * 2151 * Returns: 2152 * 0 on success / other on failure 2153 **/ 2154 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2155 { 2156 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2157 struct scsi_target *starget = scsi_target(sdev); 2158 struct fc_rport *rport = starget_to_rport(starget); 2159 struct ibmvfc_tmf *tmf; 2160 struct ibmvfc_event *evt, *found_evt; 2161 union ibmvfc_iu rsp; 2162 int rsp_rc = -EBUSY; 2163 unsigned long flags; 2164 u16 status; 2165 2166 ENTER; 2167 spin_lock_irqsave(vhost->host->host_lock, flags); 2168 found_evt = NULL; 2169 list_for_each_entry(evt, &vhost->sent, queue) { 2170 if (evt->cmnd && evt->cmnd->device == sdev) { 2171 found_evt = evt; 2172 break; 2173 } 2174 } 2175 2176 if (!found_evt) { 2177 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2178 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2179 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2180 return 0; 2181 } 2182 2183 if (vhost->logged_in) { 2184 evt = ibmvfc_get_event(vhost); 2185 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2186 2187 tmf = &evt->iu.tmf; 2188 memset(tmf, 0, sizeof(*tmf)); 2189 tmf->common.version = cpu_to_be32(1); 2190 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2191 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2192 tmf->scsi_id = cpu_to_be64(rport->port_id); 2193 int_to_scsilun(sdev->lun, &tmf->lun); 2194 if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS)) 2195 type &= ~IBMVFC_TMF_SUPPRESS_ABTS; 2196 if (vhost->state == IBMVFC_ACTIVE) 2197 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); 2198 else 2199 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); 2200 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2201 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); 2202 2203 evt->sync_iu = &rsp; 2204 init_completion(&evt->comp); 2205 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2206 } 2207 2208 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2209 2210 if (rsp_rc != 0) { 2211 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2212 /* If failure is received, the host adapter is most likely going 2213 through reset, return success so the caller will wait for the command 2214 being cancelled to get returned */ 2215 return 0; 2216 } 2217 2218 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2219 2220 wait_for_completion(&evt->comp); 2221 status = be16_to_cpu(rsp.mad_common.status); 2222 spin_lock_irqsave(vhost->host->host_lock, flags); 2223 ibmvfc_free_event(evt); 2224 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2225 2226 if (status != IBMVFC_MAD_SUCCESS) { 2227 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2228 switch (status) { 2229 case IBMVFC_MAD_DRIVER_FAILED: 2230 case IBMVFC_MAD_CRQ_ERROR: 2231 /* Host adapter most likely going through reset, return success to 2232 the caller will wait for the command being cancelled to get returned */ 2233 return 0; 2234 default: 2235 return -EIO; 2236 }; 2237 } 2238 2239 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2240 return 0; 2241 } 2242 2243 /** 2244 * ibmvfc_match_key - Match function for specified cancel key 2245 * @evt: ibmvfc event struct 2246 * @key: cancel key to match 2247 * 2248 * Returns: 2249 * 1 if event matches key / 0 if event does not match key 2250 **/ 2251 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2252 { 2253 unsigned long cancel_key = (unsigned long)key; 2254 2255 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2256 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) 2257 return 1; 2258 return 0; 2259 } 2260 2261 /** 2262 * ibmvfc_match_evt - Match function for specified event 2263 * @evt: ibmvfc event struct 2264 * @match: event to match 2265 * 2266 * Returns: 2267 * 1 if event matches key / 0 if event does not match key 2268 **/ 2269 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) 2270 { 2271 if (evt == match) 2272 return 1; 2273 return 0; 2274 } 2275 2276 /** 2277 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2278 * @sdev: scsi device to abort commands 2279 * 2280 * This sends an Abort Task Set to the VIOS for the specified device. This does 2281 * NOT send any cancel to the VIOS. That must be done separately. 2282 * 2283 * Returns: 2284 * 0 on success / other on failure 2285 **/ 2286 static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2287 { 2288 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2289 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2290 struct ibmvfc_cmd *tmf; 2291 struct ibmvfc_event *evt, *found_evt; 2292 union ibmvfc_iu rsp_iu; 2293 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 2294 int rc, rsp_rc = -EBUSY; 2295 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2296 int rsp_code = 0; 2297 2298 spin_lock_irqsave(vhost->host->host_lock, flags); 2299 found_evt = NULL; 2300 list_for_each_entry(evt, &vhost->sent, queue) { 2301 if (evt->cmnd && evt->cmnd->device == sdev) { 2302 found_evt = evt; 2303 break; 2304 } 2305 } 2306 2307 if (!found_evt) { 2308 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2309 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2310 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2311 return 0; 2312 } 2313 2314 if (vhost->state == IBMVFC_ACTIVE) { 2315 evt = ibmvfc_get_event(vhost); 2316 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2317 2318 tmf = &evt->iu.cmd; 2319 memset(tmf, 0, sizeof(*tmf)); 2320 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 2321 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); 2322 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 2323 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); 2324 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); 2325 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2326 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); 2327 int_to_scsilun(sdev->lun, &tmf->iu.lun); 2328 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2329 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 2330 evt->sync_iu = &rsp_iu; 2331 2332 init_completion(&evt->comp); 2333 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2334 } 2335 2336 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2337 2338 if (rsp_rc != 0) { 2339 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2340 return -EIO; 2341 } 2342 2343 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2344 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2345 2346 if (!timeout) { 2347 rc = ibmvfc_cancel_all(sdev, 0); 2348 if (!rc) { 2349 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2350 if (rc == SUCCESS) 2351 rc = 0; 2352 } 2353 2354 if (rc) { 2355 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2356 ibmvfc_reset_host(vhost); 2357 rsp_rc = -EIO; 2358 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2359 2360 if (rc == SUCCESS) 2361 rsp_rc = 0; 2362 2363 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); 2364 if (rc != SUCCESS) { 2365 spin_lock_irqsave(vhost->host->host_lock, flags); 2366 ibmvfc_hard_reset_host(vhost); 2367 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2368 rsp_rc = 0; 2369 } 2370 2371 goto out; 2372 } 2373 } 2374 2375 if (rsp_iu.cmd.status) 2376 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2377 2378 if (rsp_code) { 2379 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2380 rsp_code = fc_rsp->data.info.rsp_code; 2381 2382 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2383 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2384 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2385 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2386 fc_rsp->scsi_status); 2387 rsp_rc = -EIO; 2388 } else 2389 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2390 2391 out: 2392 spin_lock_irqsave(vhost->host->host_lock, flags); 2393 ibmvfc_free_event(evt); 2394 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2395 return rsp_rc; 2396 } 2397 2398 /** 2399 * ibmvfc_eh_abort_handler - Abort a command 2400 * @cmd: scsi command to abort 2401 * 2402 * Returns: 2403 * SUCCESS / FAST_IO_FAIL / FAILED 2404 **/ 2405 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2406 { 2407 struct scsi_device *sdev = cmd->device; 2408 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2409 int cancel_rc, block_rc; 2410 int rc = FAILED; 2411 2412 ENTER; 2413 block_rc = fc_block_scsi_eh(cmd); 2414 ibmvfc_wait_while_resetting(vhost); 2415 if (block_rc != FAST_IO_FAIL) { 2416 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2417 ibmvfc_abort_task_set(sdev); 2418 } else 2419 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2420 2421 if (!cancel_rc) 2422 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2423 2424 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2425 rc = FAST_IO_FAIL; 2426 2427 LEAVE; 2428 return rc; 2429 } 2430 2431 /** 2432 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2433 * @cmd: scsi command struct 2434 * 2435 * Returns: 2436 * SUCCESS / FAST_IO_FAIL / FAILED 2437 **/ 2438 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2439 { 2440 struct scsi_device *sdev = cmd->device; 2441 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2442 int cancel_rc, block_rc, reset_rc = 0; 2443 int rc = FAILED; 2444 2445 ENTER; 2446 block_rc = fc_block_scsi_eh(cmd); 2447 ibmvfc_wait_while_resetting(vhost); 2448 if (block_rc != FAST_IO_FAIL) { 2449 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2450 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2451 } else 2452 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2453 2454 if (!cancel_rc && !reset_rc) 2455 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2456 2457 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2458 rc = FAST_IO_FAIL; 2459 2460 LEAVE; 2461 return rc; 2462 } 2463 2464 /** 2465 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function 2466 * @sdev: scsi device struct 2467 * @data: return code 2468 * 2469 **/ 2470 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) 2471 { 2472 unsigned long *rc = data; 2473 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2474 } 2475 2476 /** 2477 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2478 * @sdev: scsi device struct 2479 * @data: return code 2480 * 2481 **/ 2482 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2483 { 2484 unsigned long *rc = data; 2485 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2486 } 2487 2488 /** 2489 * ibmvfc_eh_target_reset_handler - Reset the target 2490 * @cmd: scsi command struct 2491 * 2492 * Returns: 2493 * SUCCESS / FAST_IO_FAIL / FAILED 2494 **/ 2495 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2496 { 2497 struct scsi_device *sdev = cmd->device; 2498 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2499 struct scsi_target *starget = scsi_target(sdev); 2500 int block_rc; 2501 int reset_rc = 0; 2502 int rc = FAILED; 2503 unsigned long cancel_rc = 0; 2504 2505 ENTER; 2506 block_rc = fc_block_scsi_eh(cmd); 2507 ibmvfc_wait_while_resetting(vhost); 2508 if (block_rc != FAST_IO_FAIL) { 2509 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2510 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2511 } else 2512 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); 2513 2514 if (!cancel_rc && !reset_rc) 2515 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2516 2517 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2518 rc = FAST_IO_FAIL; 2519 2520 LEAVE; 2521 return rc; 2522 } 2523 2524 /** 2525 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2526 * @cmd: struct scsi_cmnd having problems 2527 * 2528 **/ 2529 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2530 { 2531 int rc; 2532 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2533 2534 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2535 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2536 2537 return rc ? FAILED : SUCCESS; 2538 } 2539 2540 /** 2541 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2542 * @rport: rport struct 2543 * 2544 * Return value: 2545 * none 2546 **/ 2547 static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2548 { 2549 struct Scsi_Host *shost = rport_to_shost(rport); 2550 struct ibmvfc_host *vhost = shost_priv(shost); 2551 struct fc_rport *dev_rport; 2552 struct scsi_device *sdev; 2553 unsigned long rc; 2554 2555 ENTER; 2556 shost_for_each_device(sdev, shost) { 2557 dev_rport = starget_to_rport(scsi_target(sdev)); 2558 if (dev_rport != rport) 2559 continue; 2560 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2561 } 2562 2563 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 2564 2565 if (rc == FAILED) 2566 ibmvfc_issue_fc_host_lip(shost); 2567 LEAVE; 2568 } 2569 2570 static const struct ibmvfc_async_desc ae_desc [] = { 2571 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2572 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2573 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2574 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2575 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2576 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, 2577 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, 2578 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, 2579 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, 2580 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, 2581 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, 2582 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, 2583 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, 2584 }; 2585 2586 static const struct ibmvfc_async_desc unknown_ae = { 2587 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL 2588 }; 2589 2590 /** 2591 * ibmvfc_get_ae_desc - Get text description for async event 2592 * @ae: async event 2593 * 2594 **/ 2595 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 2596 { 2597 int i; 2598 2599 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2600 if (ae_desc[i].ae == ae) 2601 return &ae_desc[i]; 2602 2603 return &unknown_ae; 2604 } 2605 2606 static const struct { 2607 enum ibmvfc_ae_link_state state; 2608 const char *desc; 2609 } link_desc [] = { 2610 { IBMVFC_AE_LS_LINK_UP, " link up" }, 2611 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 2612 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 2613 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 2614 }; 2615 2616 /** 2617 * ibmvfc_get_link_state - Get text description for link state 2618 * @state: link state 2619 * 2620 **/ 2621 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 2622 { 2623 int i; 2624 2625 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 2626 if (link_desc[i].state == state) 2627 return link_desc[i].desc; 2628 2629 return ""; 2630 } 2631 2632 /** 2633 * ibmvfc_handle_async - Handle an async event from the adapter 2634 * @crq: crq to process 2635 * @vhost: ibmvfc host struct 2636 * 2637 **/ 2638 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2639 struct ibmvfc_host *vhost) 2640 { 2641 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); 2642 struct ibmvfc_target *tgt; 2643 2644 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 2645 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id), 2646 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name), 2647 ibmvfc_get_link_state(crq->link_state)); 2648 2649 switch (be64_to_cpu(crq->event)) { 2650 case IBMVFC_AE_RESUME: 2651 switch (crq->link_state) { 2652 case IBMVFC_AE_LS_LINK_DOWN: 2653 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2654 break; 2655 case IBMVFC_AE_LS_LINK_DEAD: 2656 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2657 break; 2658 case IBMVFC_AE_LS_LINK_UP: 2659 case IBMVFC_AE_LS_LINK_BOUNCED: 2660 default: 2661 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2662 vhost->delay_init = 1; 2663 __ibmvfc_reset_host(vhost); 2664 break; 2665 }; 2666 2667 break; 2668 case IBMVFC_AE_LINK_UP: 2669 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2670 vhost->delay_init = 1; 2671 __ibmvfc_reset_host(vhost); 2672 break; 2673 case IBMVFC_AE_SCN_FABRIC: 2674 case IBMVFC_AE_SCN_DOMAIN: 2675 vhost->events_to_log |= IBMVFC_AE_RSCN; 2676 if (vhost->state < IBMVFC_HALTED) { 2677 vhost->delay_init = 1; 2678 __ibmvfc_reset_host(vhost); 2679 } 2680 break; 2681 case IBMVFC_AE_SCN_NPORT: 2682 case IBMVFC_AE_SCN_GROUP: 2683 vhost->events_to_log |= IBMVFC_AE_RSCN; 2684 ibmvfc_reinit_host(vhost); 2685 break; 2686 case IBMVFC_AE_ELS_LOGO: 2687 case IBMVFC_AE_ELS_PRLO: 2688 case IBMVFC_AE_ELS_PLOGI: 2689 list_for_each_entry(tgt, &vhost->targets, queue) { 2690 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 2691 break; 2692 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) 2693 continue; 2694 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) 2695 continue; 2696 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) 2697 continue; 2698 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) 2699 tgt->logo_rcvd = 1; 2700 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { 2701 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2702 ibmvfc_reinit_host(vhost); 2703 } 2704 } 2705 break; 2706 case IBMVFC_AE_LINK_DOWN: 2707 case IBMVFC_AE_ADAPTER_FAILED: 2708 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2709 break; 2710 case IBMVFC_AE_LINK_DEAD: 2711 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2712 break; 2713 case IBMVFC_AE_HALT: 2714 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2715 break; 2716 default: 2717 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2718 break; 2719 }; 2720 } 2721 2722 /** 2723 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2724 * @crq: Command/Response queue 2725 * @vhost: ibmvfc host struct 2726 * 2727 **/ 2728 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2729 { 2730 long rc; 2731 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 2732 2733 switch (crq->valid) { 2734 case IBMVFC_CRQ_INIT_RSP: 2735 switch (crq->format) { 2736 case IBMVFC_CRQ_INIT: 2737 dev_info(vhost->dev, "Partner initialized\n"); 2738 /* Send back a response */ 2739 rc = ibmvfc_send_crq_init_complete(vhost); 2740 if (rc == 0) 2741 ibmvfc_init_host(vhost); 2742 else 2743 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2744 break; 2745 case IBMVFC_CRQ_INIT_COMPLETE: 2746 dev_info(vhost->dev, "Partner initialization complete\n"); 2747 ibmvfc_init_host(vhost); 2748 break; 2749 default: 2750 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2751 } 2752 return; 2753 case IBMVFC_CRQ_XPORT_EVENT: 2754 vhost->state = IBMVFC_NO_CRQ; 2755 vhost->logged_in = 0; 2756 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2757 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2758 /* We need to re-setup the interpartition connection */ 2759 dev_info(vhost->dev, "Re-enabling adapter\n"); 2760 vhost->client_migrated = 1; 2761 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2762 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2763 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 2764 } else { 2765 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2766 ibmvfc_purge_requests(vhost, DID_ERROR); 2767 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2768 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 2769 } 2770 return; 2771 case IBMVFC_CRQ_CMD_RSP: 2772 break; 2773 default: 2774 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2775 return; 2776 } 2777 2778 if (crq->format == IBMVFC_ASYNC_EVENT) 2779 return; 2780 2781 /* The only kind of payload CRQs we should get are responses to 2782 * things we send. Make sure this response is to something we 2783 * actually sent 2784 */ 2785 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2786 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2787 crq->ioba); 2788 return; 2789 } 2790 2791 if (unlikely(atomic_read(&evt->free))) { 2792 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2793 crq->ioba); 2794 return; 2795 } 2796 2797 del_timer(&evt->timer); 2798 list_del(&evt->queue); 2799 ibmvfc_trc_end(evt); 2800 evt->done(evt); 2801 } 2802 2803 /** 2804 * ibmvfc_scan_finished - Check if the device scan is done. 2805 * @shost: scsi host struct 2806 * @time: current elapsed time 2807 * 2808 * Returns: 2809 * 0 if scan is not done / 1 if scan is done 2810 **/ 2811 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2812 { 2813 unsigned long flags; 2814 struct ibmvfc_host *vhost = shost_priv(shost); 2815 int done = 0; 2816 2817 spin_lock_irqsave(shost->host_lock, flags); 2818 if (time >= (init_timeout * HZ)) { 2819 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2820 "continuing initialization\n", init_timeout); 2821 done = 1; 2822 } 2823 2824 if (vhost->scan_complete) 2825 done = 1; 2826 spin_unlock_irqrestore(shost->host_lock, flags); 2827 return done; 2828 } 2829 2830 /** 2831 * ibmvfc_slave_alloc - Setup the device's task set value 2832 * @sdev: struct scsi_device device to configure 2833 * 2834 * Set the device's task set value so that error handling works as 2835 * expected. 2836 * 2837 * Returns: 2838 * 0 on success / -ENXIO if device does not exist 2839 **/ 2840 static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2841 { 2842 struct Scsi_Host *shost = sdev->host; 2843 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2844 struct ibmvfc_host *vhost = shost_priv(shost); 2845 unsigned long flags = 0; 2846 2847 if (!rport || fc_remote_port_chkready(rport)) 2848 return -ENXIO; 2849 2850 spin_lock_irqsave(shost->host_lock, flags); 2851 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2852 spin_unlock_irqrestore(shost->host_lock, flags); 2853 return 0; 2854 } 2855 2856 /** 2857 * ibmvfc_target_alloc - Setup the target's task set value 2858 * @starget: struct scsi_target 2859 * 2860 * Set the target's task set value so that error handling works as 2861 * expected. 2862 * 2863 * Returns: 2864 * 0 on success / -ENXIO if device does not exist 2865 **/ 2866 static int ibmvfc_target_alloc(struct scsi_target *starget) 2867 { 2868 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2869 struct ibmvfc_host *vhost = shost_priv(shost); 2870 unsigned long flags = 0; 2871 2872 spin_lock_irqsave(shost->host_lock, flags); 2873 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2874 spin_unlock_irqrestore(shost->host_lock, flags); 2875 return 0; 2876 } 2877 2878 /** 2879 * ibmvfc_slave_configure - Configure the device 2880 * @sdev: struct scsi_device device to configure 2881 * 2882 * Enable allow_restart for a device if it is a disk. Adjust the 2883 * queue_depth here also. 2884 * 2885 * Returns: 2886 * 0 2887 **/ 2888 static int ibmvfc_slave_configure(struct scsi_device *sdev) 2889 { 2890 struct Scsi_Host *shost = sdev->host; 2891 unsigned long flags = 0; 2892 2893 spin_lock_irqsave(shost->host_lock, flags); 2894 if (sdev->type == TYPE_DISK) 2895 sdev->allow_restart = 1; 2896 spin_unlock_irqrestore(shost->host_lock, flags); 2897 return 0; 2898 } 2899 2900 /** 2901 * ibmvfc_change_queue_depth - Change the device's queue depth 2902 * @sdev: scsi device struct 2903 * @qdepth: depth to set 2904 * @reason: calling context 2905 * 2906 * Return value: 2907 * actual depth set 2908 **/ 2909 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 2910 { 2911 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2912 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2913 2914 return scsi_change_queue_depth(sdev, qdepth); 2915 } 2916 2917 static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2918 struct device_attribute *attr, char *buf) 2919 { 2920 struct Scsi_Host *shost = class_to_shost(dev); 2921 struct ibmvfc_host *vhost = shost_priv(shost); 2922 2923 return snprintf(buf, PAGE_SIZE, "%s\n", 2924 vhost->login_buf->resp.partition_name); 2925 } 2926 2927 static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2928 struct device_attribute *attr, char *buf) 2929 { 2930 struct Scsi_Host *shost = class_to_shost(dev); 2931 struct ibmvfc_host *vhost = shost_priv(shost); 2932 2933 return snprintf(buf, PAGE_SIZE, "%s\n", 2934 vhost->login_buf->resp.device_name); 2935 } 2936 2937 static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2938 struct device_attribute *attr, char *buf) 2939 { 2940 struct Scsi_Host *shost = class_to_shost(dev); 2941 struct ibmvfc_host *vhost = shost_priv(shost); 2942 2943 return snprintf(buf, PAGE_SIZE, "%s\n", 2944 vhost->login_buf->resp.port_loc_code); 2945 } 2946 2947 static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2948 struct device_attribute *attr, char *buf) 2949 { 2950 struct Scsi_Host *shost = class_to_shost(dev); 2951 struct ibmvfc_host *vhost = shost_priv(shost); 2952 2953 return snprintf(buf, PAGE_SIZE, "%s\n", 2954 vhost->login_buf->resp.drc_name); 2955 } 2956 2957 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2958 struct device_attribute *attr, char *buf) 2959 { 2960 struct Scsi_Host *shost = class_to_shost(dev); 2961 struct ibmvfc_host *vhost = shost_priv(shost); 2962 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2963 } 2964 2965 static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 2966 struct device_attribute *attr, char *buf) 2967 { 2968 struct Scsi_Host *shost = class_to_shost(dev); 2969 struct ibmvfc_host *vhost = shost_priv(shost); 2970 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); 2971 } 2972 2973 /** 2974 * ibmvfc_show_log_level - Show the adapter's error logging level 2975 * @dev: class device struct 2976 * @buf: buffer 2977 * 2978 * Return value: 2979 * number of bytes printed to buffer 2980 **/ 2981 static ssize_t ibmvfc_show_log_level(struct device *dev, 2982 struct device_attribute *attr, char *buf) 2983 { 2984 struct Scsi_Host *shost = class_to_shost(dev); 2985 struct ibmvfc_host *vhost = shost_priv(shost); 2986 unsigned long flags = 0; 2987 int len; 2988 2989 spin_lock_irqsave(shost->host_lock, flags); 2990 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2991 spin_unlock_irqrestore(shost->host_lock, flags); 2992 return len; 2993 } 2994 2995 /** 2996 * ibmvfc_store_log_level - Change the adapter's error logging level 2997 * @dev: class device struct 2998 * @buf: buffer 2999 * 3000 * Return value: 3001 * number of bytes printed to buffer 3002 **/ 3003 static ssize_t ibmvfc_store_log_level(struct device *dev, 3004 struct device_attribute *attr, 3005 const char *buf, size_t count) 3006 { 3007 struct Scsi_Host *shost = class_to_shost(dev); 3008 struct ibmvfc_host *vhost = shost_priv(shost); 3009 unsigned long flags = 0; 3010 3011 spin_lock_irqsave(shost->host_lock, flags); 3012 vhost->log_level = simple_strtoul(buf, NULL, 10); 3013 spin_unlock_irqrestore(shost->host_lock, flags); 3014 return strlen(buf); 3015 } 3016 3017 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 3018 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 3019 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 3020 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 3021 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 3022 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 3023 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 3024 ibmvfc_show_log_level, ibmvfc_store_log_level); 3025 3026 #ifdef CONFIG_SCSI_IBMVFC_TRACE 3027 /** 3028 * ibmvfc_read_trace - Dump the adapter trace 3029 * @filp: open sysfs file 3030 * @kobj: kobject struct 3031 * @bin_attr: bin_attribute struct 3032 * @buf: buffer 3033 * @off: offset 3034 * @count: buffer size 3035 * 3036 * Return value: 3037 * number of bytes printed to buffer 3038 **/ 3039 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 3040 struct bin_attribute *bin_attr, 3041 char *buf, loff_t off, size_t count) 3042 { 3043 struct device *dev = container_of(kobj, struct device, kobj); 3044 struct Scsi_Host *shost = class_to_shost(dev); 3045 struct ibmvfc_host *vhost = shost_priv(shost); 3046 unsigned long flags = 0; 3047 int size = IBMVFC_TRACE_SIZE; 3048 char *src = (char *)vhost->trace; 3049 3050 if (off > size) 3051 return 0; 3052 if (off + count > size) { 3053 size -= off; 3054 count = size; 3055 } 3056 3057 spin_lock_irqsave(shost->host_lock, flags); 3058 memcpy(buf, &src[off], count); 3059 spin_unlock_irqrestore(shost->host_lock, flags); 3060 return count; 3061 } 3062 3063 static struct bin_attribute ibmvfc_trace_attr = { 3064 .attr = { 3065 .name = "trace", 3066 .mode = S_IRUGO, 3067 }, 3068 .size = 0, 3069 .read = ibmvfc_read_trace, 3070 }; 3071 #endif 3072 3073 static struct device_attribute *ibmvfc_attrs[] = { 3074 &dev_attr_partition_name, 3075 &dev_attr_device_name, 3076 &dev_attr_port_loc_code, 3077 &dev_attr_drc_name, 3078 &dev_attr_npiv_version, 3079 &dev_attr_capabilities, 3080 &dev_attr_log_level, 3081 NULL 3082 }; 3083 3084 static struct scsi_host_template driver_template = { 3085 .module = THIS_MODULE, 3086 .name = "IBM POWER Virtual FC Adapter", 3087 .proc_name = IBMVFC_NAME, 3088 .queuecommand = ibmvfc_queuecommand, 3089 .eh_timed_out = fc_eh_timed_out, 3090 .eh_abort_handler = ibmvfc_eh_abort_handler, 3091 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3092 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3093 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3094 .slave_alloc = ibmvfc_slave_alloc, 3095 .slave_configure = ibmvfc_slave_configure, 3096 .target_alloc = ibmvfc_target_alloc, 3097 .scan_finished = ibmvfc_scan_finished, 3098 .change_queue_depth = ibmvfc_change_queue_depth, 3099 .cmd_per_lun = 16, 3100 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3101 .this_id = -1, 3102 .sg_tablesize = SG_ALL, 3103 .max_sectors = IBMVFC_MAX_SECTORS, 3104 .use_clustering = ENABLE_CLUSTERING, 3105 .shost_attrs = ibmvfc_attrs, 3106 .track_queue_depth = 1, 3107 }; 3108 3109 /** 3110 * ibmvfc_next_async_crq - Returns the next entry in async queue 3111 * @vhost: ibmvfc host struct 3112 * 3113 * Returns: 3114 * Pointer to next entry in queue / NULL if empty 3115 **/ 3116 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3117 { 3118 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 3119 struct ibmvfc_async_crq *crq; 3120 3121 crq = &async_crq->msgs[async_crq->cur]; 3122 if (crq->valid & 0x80) { 3123 if (++async_crq->cur == async_crq->size) 3124 async_crq->cur = 0; 3125 rmb(); 3126 } else 3127 crq = NULL; 3128 3129 return crq; 3130 } 3131 3132 /** 3133 * ibmvfc_next_crq - Returns the next entry in message queue 3134 * @vhost: ibmvfc host struct 3135 * 3136 * Returns: 3137 * Pointer to next entry in queue / NULL if empty 3138 **/ 3139 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3140 { 3141 struct ibmvfc_crq_queue *queue = &vhost->crq; 3142 struct ibmvfc_crq *crq; 3143 3144 crq = &queue->msgs[queue->cur]; 3145 if (crq->valid & 0x80) { 3146 if (++queue->cur == queue->size) 3147 queue->cur = 0; 3148 rmb(); 3149 } else 3150 crq = NULL; 3151 3152 return crq; 3153 } 3154 3155 /** 3156 * ibmvfc_interrupt - Interrupt handler 3157 * @irq: number of irq to handle, not used 3158 * @dev_instance: ibmvfc_host that received interrupt 3159 * 3160 * Returns: 3161 * IRQ_HANDLED 3162 **/ 3163 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3164 { 3165 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3166 unsigned long flags; 3167 3168 spin_lock_irqsave(vhost->host->host_lock, flags); 3169 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3170 tasklet_schedule(&vhost->tasklet); 3171 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3172 return IRQ_HANDLED; 3173 } 3174 3175 /** 3176 * ibmvfc_tasklet - Interrupt handler tasklet 3177 * @data: ibmvfc host struct 3178 * 3179 * Returns: 3180 * Nothing 3181 **/ 3182 static void ibmvfc_tasklet(void *data) 3183 { 3184 struct ibmvfc_host *vhost = data; 3185 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3186 struct ibmvfc_crq *crq; 3187 struct ibmvfc_async_crq *async; 3188 unsigned long flags; 3189 int done = 0; 3190 3191 spin_lock_irqsave(vhost->host->host_lock, flags); 3192 while (!done) { 3193 /* Pull all the valid messages off the async CRQ */ 3194 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3195 ibmvfc_handle_async(async, vhost); 3196 async->valid = 0; 3197 wmb(); 3198 } 3199 3200 /* Pull all the valid messages off the CRQ */ 3201 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3202 ibmvfc_handle_crq(crq, vhost); 3203 crq->valid = 0; 3204 wmb(); 3205 } 3206 3207 vio_enable_interrupts(vdev); 3208 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3209 vio_disable_interrupts(vdev); 3210 ibmvfc_handle_async(async, vhost); 3211 async->valid = 0; 3212 wmb(); 3213 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3214 vio_disable_interrupts(vdev); 3215 ibmvfc_handle_crq(crq, vhost); 3216 crq->valid = 0; 3217 wmb(); 3218 } else 3219 done = 1; 3220 } 3221 3222 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3223 } 3224 3225 /** 3226 * ibmvfc_init_tgt - Set the next init job step for the target 3227 * @tgt: ibmvfc target struct 3228 * @job_step: job step to perform 3229 * 3230 **/ 3231 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3232 void (*job_step) (struct ibmvfc_target *)) 3233 { 3234 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 3235 tgt->job_step = job_step; 3236 wake_up(&tgt->vhost->work_wait_q); 3237 } 3238 3239 /** 3240 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3241 * @tgt: ibmvfc target struct 3242 * @job_step: initialization job step 3243 * 3244 * Returns: 1 if step will be retried / 0 if not 3245 * 3246 **/ 3247 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3248 void (*job_step) (struct ibmvfc_target *)) 3249 { 3250 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3251 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3252 wake_up(&tgt->vhost->work_wait_q); 3253 return 0; 3254 } else 3255 ibmvfc_init_tgt(tgt, job_step); 3256 return 1; 3257 } 3258 3259 /* Defined in FC-LS */ 3260 static const struct { 3261 int code; 3262 int retry; 3263 int logged_in; 3264 } prli_rsp [] = { 3265 { 0, 1, 0 }, 3266 { 1, 0, 1 }, 3267 { 2, 1, 0 }, 3268 { 3, 1, 0 }, 3269 { 4, 0, 0 }, 3270 { 5, 0, 0 }, 3271 { 6, 0, 1 }, 3272 { 7, 0, 0 }, 3273 { 8, 1, 0 }, 3274 }; 3275 3276 /** 3277 * ibmvfc_get_prli_rsp - Find PRLI response index 3278 * @flags: PRLI response flags 3279 * 3280 **/ 3281 static int ibmvfc_get_prli_rsp(u16 flags) 3282 { 3283 int i; 3284 int code = (flags & 0x0f00) >> 8; 3285 3286 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3287 if (prli_rsp[i].code == code) 3288 return i; 3289 3290 return 0; 3291 } 3292 3293 /** 3294 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3295 * @evt: ibmvfc event struct 3296 * 3297 **/ 3298 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3299 { 3300 struct ibmvfc_target *tgt = evt->tgt; 3301 struct ibmvfc_host *vhost = evt->vhost; 3302 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3303 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3304 u32 status = be16_to_cpu(rsp->common.status); 3305 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3306 3307 vhost->discovery_threads--; 3308 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3309 switch (status) { 3310 case IBMVFC_MAD_SUCCESS: 3311 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3312 parms->type, parms->flags, parms->service_parms); 3313 3314 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3315 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); 3316 if (prli_rsp[index].logged_in) { 3317 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { 3318 tgt->need_login = 0; 3319 tgt->ids.roles = 0; 3320 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) 3321 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3322 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) 3323 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3324 tgt->add_rport = 1; 3325 } else 3326 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3327 } else if (prli_rsp[index].retry) 3328 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3329 else 3330 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3331 } else 3332 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3333 break; 3334 case IBMVFC_MAD_DRIVER_FAILED: 3335 break; 3336 case IBMVFC_MAD_CRQ_ERROR: 3337 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3338 break; 3339 case IBMVFC_MAD_FAILED: 3340 default: 3341 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && 3342 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) 3343 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3344 else if (tgt->logo_rcvd) 3345 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3346 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3347 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3348 else 3349 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3350 3351 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3352 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3353 rsp->status, rsp->error, status); 3354 break; 3355 }; 3356 3357 kref_put(&tgt->kref, ibmvfc_release_tgt); 3358 ibmvfc_free_event(evt); 3359 wake_up(&vhost->work_wait_q); 3360 } 3361 3362 /** 3363 * ibmvfc_tgt_send_prli - Send a process login 3364 * @tgt: ibmvfc target struct 3365 * 3366 **/ 3367 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3368 { 3369 struct ibmvfc_process_login *prli; 3370 struct ibmvfc_host *vhost = tgt->vhost; 3371 struct ibmvfc_event *evt; 3372 3373 if (vhost->discovery_threads >= disc_threads) 3374 return; 3375 3376 kref_get(&tgt->kref); 3377 evt = ibmvfc_get_event(vhost); 3378 vhost->discovery_threads++; 3379 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 3380 evt->tgt = tgt; 3381 prli = &evt->iu.prli; 3382 memset(prli, 0, sizeof(*prli)); 3383 prli->common.version = cpu_to_be32(1); 3384 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); 3385 prli->common.length = cpu_to_be16(sizeof(*prli)); 3386 prli->scsi_id = cpu_to_be64(tgt->scsi_id); 3387 3388 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 3389 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); 3390 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); 3391 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED); 3392 3393 if (cls3_error) 3394 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY); 3395 3396 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3397 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3398 vhost->discovery_threads--; 3399 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3400 kref_put(&tgt->kref, ibmvfc_release_tgt); 3401 } else 3402 tgt_dbg(tgt, "Sent process login\n"); 3403 } 3404 3405 /** 3406 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 3407 * @evt: ibmvfc event struct 3408 * 3409 **/ 3410 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 3411 { 3412 struct ibmvfc_target *tgt = evt->tgt; 3413 struct ibmvfc_host *vhost = evt->vhost; 3414 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 3415 u32 status = be16_to_cpu(rsp->common.status); 3416 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3417 3418 vhost->discovery_threads--; 3419 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3420 switch (status) { 3421 case IBMVFC_MAD_SUCCESS: 3422 tgt_dbg(tgt, "Port Login succeeded\n"); 3423 if (tgt->ids.port_name && 3424 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 3425 vhost->reinit = 1; 3426 tgt_dbg(tgt, "Port re-init required\n"); 3427 break; 3428 } 3429 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3430 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3431 tgt->ids.port_id = tgt->scsi_id; 3432 memcpy(&tgt->service_parms, &rsp->service_parms, 3433 sizeof(tgt->service_parms)); 3434 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3435 sizeof(tgt->service_parms_change)); 3436 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3437 break; 3438 case IBMVFC_MAD_DRIVER_FAILED: 3439 break; 3440 case IBMVFC_MAD_CRQ_ERROR: 3441 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3442 break; 3443 case IBMVFC_MAD_FAILED: 3444 default: 3445 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3446 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3447 else 3448 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3449 3450 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3451 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), rsp->status, rsp->error, 3452 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), rsp->fc_type, 3453 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), rsp->fc_explain, status); 3454 break; 3455 }; 3456 3457 kref_put(&tgt->kref, ibmvfc_release_tgt); 3458 ibmvfc_free_event(evt); 3459 wake_up(&vhost->work_wait_q); 3460 } 3461 3462 /** 3463 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3464 * @tgt: ibmvfc target struct 3465 * 3466 **/ 3467 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3468 { 3469 struct ibmvfc_port_login *plogi; 3470 struct ibmvfc_host *vhost = tgt->vhost; 3471 struct ibmvfc_event *evt; 3472 3473 if (vhost->discovery_threads >= disc_threads) 3474 return; 3475 3476 kref_get(&tgt->kref); 3477 tgt->logo_rcvd = 0; 3478 evt = ibmvfc_get_event(vhost); 3479 vhost->discovery_threads++; 3480 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3481 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3482 evt->tgt = tgt; 3483 plogi = &evt->iu.plogi; 3484 memset(plogi, 0, sizeof(*plogi)); 3485 plogi->common.version = cpu_to_be32(1); 3486 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 3487 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 3488 plogi->scsi_id = cpu_to_be64(tgt->scsi_id); 3489 3490 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3491 vhost->discovery_threads--; 3492 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3493 kref_put(&tgt->kref, ibmvfc_release_tgt); 3494 } else 3495 tgt_dbg(tgt, "Sent port login\n"); 3496 } 3497 3498 /** 3499 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3500 * @evt: ibmvfc event struct 3501 * 3502 **/ 3503 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3504 { 3505 struct ibmvfc_target *tgt = evt->tgt; 3506 struct ibmvfc_host *vhost = evt->vhost; 3507 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3508 u32 status = be16_to_cpu(rsp->common.status); 3509 3510 vhost->discovery_threads--; 3511 ibmvfc_free_event(evt); 3512 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3513 3514 switch (status) { 3515 case IBMVFC_MAD_SUCCESS: 3516 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3517 break; 3518 case IBMVFC_MAD_DRIVER_FAILED: 3519 kref_put(&tgt->kref, ibmvfc_release_tgt); 3520 wake_up(&vhost->work_wait_q); 3521 return; 3522 case IBMVFC_MAD_FAILED: 3523 default: 3524 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3525 break; 3526 }; 3527 3528 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3529 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3530 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3531 tgt->scsi_id != tgt->new_scsi_id) 3532 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3533 kref_put(&tgt->kref, ibmvfc_release_tgt); 3534 wake_up(&vhost->work_wait_q); 3535 } 3536 3537 /** 3538 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3539 * @tgt: ibmvfc target struct 3540 * 3541 **/ 3542 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3543 { 3544 struct ibmvfc_implicit_logout *mad; 3545 struct ibmvfc_host *vhost = tgt->vhost; 3546 struct ibmvfc_event *evt; 3547 3548 if (vhost->discovery_threads >= disc_threads) 3549 return; 3550 3551 kref_get(&tgt->kref); 3552 evt = ibmvfc_get_event(vhost); 3553 vhost->discovery_threads++; 3554 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3555 evt->tgt = tgt; 3556 mad = &evt->iu.implicit_logout; 3557 memset(mad, 0, sizeof(*mad)); 3558 mad->common.version = cpu_to_be32(1); 3559 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); 3560 mad->common.length = cpu_to_be16(sizeof(*mad)); 3561 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); 3562 3563 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3564 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3565 vhost->discovery_threads--; 3566 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3567 kref_put(&tgt->kref, ibmvfc_release_tgt); 3568 } else 3569 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3570 } 3571 3572 /** 3573 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3574 * @mad: ibmvfc passthru mad struct 3575 * @tgt: ibmvfc target struct 3576 * 3577 * Returns: 3578 * 1 if PLOGI needed / 0 if PLOGI not needed 3579 **/ 3580 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3581 struct ibmvfc_target *tgt) 3582 { 3583 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3584 sizeof(tgt->ids.port_name))) 3585 return 1; 3586 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3587 sizeof(tgt->ids.node_name))) 3588 return 1; 3589 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) 3590 return 1; 3591 return 0; 3592 } 3593 3594 /** 3595 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3596 * @evt: ibmvfc event struct 3597 * 3598 **/ 3599 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3600 { 3601 struct ibmvfc_target *tgt = evt->tgt; 3602 struct ibmvfc_host *vhost = evt->vhost; 3603 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3604 u32 status = be16_to_cpu(mad->common.status); 3605 u8 fc_reason, fc_explain; 3606 3607 vhost->discovery_threads--; 3608 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3609 del_timer(&tgt->timer); 3610 3611 switch (status) { 3612 case IBMVFC_MAD_SUCCESS: 3613 tgt_dbg(tgt, "ADISC succeeded\n"); 3614 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3615 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3616 break; 3617 case IBMVFC_MAD_DRIVER_FAILED: 3618 break; 3619 case IBMVFC_MAD_FAILED: 3620 default: 3621 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3622 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; 3623 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; 3624 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3625 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), 3626 mad->iu.status, mad->iu.error, 3627 ibmvfc_get_fc_type(fc_reason), fc_reason, 3628 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3629 break; 3630 }; 3631 3632 kref_put(&tgt->kref, ibmvfc_release_tgt); 3633 ibmvfc_free_event(evt); 3634 wake_up(&vhost->work_wait_q); 3635 } 3636 3637 /** 3638 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3639 * @evt: ibmvfc event struct 3640 * 3641 **/ 3642 static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3643 { 3644 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3645 3646 memset(mad, 0, sizeof(*mad)); 3647 mad->common.version = cpu_to_be32(1); 3648 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 3649 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 3650 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3651 offsetof(struct ibmvfc_passthru_mad, iu)); 3652 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 3653 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3654 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3655 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3656 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3657 offsetof(struct ibmvfc_passthru_fc_iu, payload)); 3658 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3659 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3660 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3661 offsetof(struct ibmvfc_passthru_fc_iu, response)); 3662 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3663 } 3664 3665 /** 3666 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3667 * @evt: ibmvfc event struct 3668 * 3669 * Just cleanup this event struct. Everything else is handled by 3670 * the ADISC completion handler. If the ADISC never actually comes 3671 * back, we still have the timer running on the ADISC event struct 3672 * which will fire and cause the CRQ to get reset. 3673 * 3674 **/ 3675 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3676 { 3677 struct ibmvfc_host *vhost = evt->vhost; 3678 struct ibmvfc_target *tgt = evt->tgt; 3679 3680 tgt_dbg(tgt, "ADISC cancel complete\n"); 3681 vhost->abort_threads--; 3682 ibmvfc_free_event(evt); 3683 kref_put(&tgt->kref, ibmvfc_release_tgt); 3684 wake_up(&vhost->work_wait_q); 3685 } 3686 3687 /** 3688 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3689 * @tgt: ibmvfc target struct 3690 * 3691 * If an ADISC times out, send a cancel. If the cancel times 3692 * out, reset the CRQ. When the ADISC comes back as cancelled, 3693 * log back into the target. 3694 **/ 3695 static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) 3696 { 3697 struct ibmvfc_host *vhost = tgt->vhost; 3698 struct ibmvfc_event *evt; 3699 struct ibmvfc_tmf *tmf; 3700 unsigned long flags; 3701 int rc; 3702 3703 tgt_dbg(tgt, "ADISC timeout\n"); 3704 spin_lock_irqsave(vhost->host->host_lock, flags); 3705 if (vhost->abort_threads >= disc_threads || 3706 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3707 vhost->state != IBMVFC_INITIALIZING || 3708 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3709 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3710 return; 3711 } 3712 3713 vhost->abort_threads++; 3714 kref_get(&tgt->kref); 3715 evt = ibmvfc_get_event(vhost); 3716 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3717 3718 evt->tgt = tgt; 3719 tmf = &evt->iu.tmf; 3720 memset(tmf, 0, sizeof(*tmf)); 3721 tmf->common.version = cpu_to_be32(1); 3722 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 3723 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 3724 tmf->scsi_id = cpu_to_be64(tgt->scsi_id); 3725 tmf->cancel_key = cpu_to_be32(tgt->cancel_key); 3726 3727 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3728 3729 if (rc) { 3730 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3731 vhost->abort_threads--; 3732 kref_put(&tgt->kref, ibmvfc_release_tgt); 3733 __ibmvfc_reset_host(vhost); 3734 } else 3735 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3736 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3737 } 3738 3739 /** 3740 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3741 * @tgt: ibmvfc target struct 3742 * 3743 * When sending an ADISC we end up with two timers running. The 3744 * first timer is the timer in the ibmvfc target struct. If this 3745 * fires, we send a cancel to the target. The second timer is the 3746 * timer on the ibmvfc event for the ADISC, which is longer. If that 3747 * fires, it means the ADISC timed out and our attempt to cancel it 3748 * also failed, so we need to reset the CRQ. 3749 **/ 3750 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3751 { 3752 struct ibmvfc_passthru_mad *mad; 3753 struct ibmvfc_host *vhost = tgt->vhost; 3754 struct ibmvfc_event *evt; 3755 3756 if (vhost->discovery_threads >= disc_threads) 3757 return; 3758 3759 kref_get(&tgt->kref); 3760 evt = ibmvfc_get_event(vhost); 3761 vhost->discovery_threads++; 3762 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3763 evt->tgt = tgt; 3764 3765 ibmvfc_init_passthru(evt); 3766 mad = &evt->iu.passthru; 3767 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); 3768 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); 3769 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); 3770 3771 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); 3772 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3773 sizeof(vhost->login_buf->resp.port_name)); 3774 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3775 sizeof(vhost->login_buf->resp.node_name)); 3776 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); 3777 3778 if (timer_pending(&tgt->timer)) 3779 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3780 else { 3781 tgt->timer.data = (unsigned long) tgt; 3782 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3783 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; 3784 add_timer(&tgt->timer); 3785 } 3786 3787 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3788 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3789 vhost->discovery_threads--; 3790 del_timer(&tgt->timer); 3791 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3792 kref_put(&tgt->kref, ibmvfc_release_tgt); 3793 } else 3794 tgt_dbg(tgt, "Sent ADISC\n"); 3795 } 3796 3797 /** 3798 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3799 * @evt: ibmvfc event struct 3800 * 3801 **/ 3802 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3803 { 3804 struct ibmvfc_target *tgt = evt->tgt; 3805 struct ibmvfc_host *vhost = evt->vhost; 3806 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3807 u32 status = be16_to_cpu(rsp->common.status); 3808 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3809 3810 vhost->discovery_threads--; 3811 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3812 switch (status) { 3813 case IBMVFC_MAD_SUCCESS: 3814 tgt_dbg(tgt, "Query Target succeeded\n"); 3815 tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id); 3816 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) 3817 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3818 else 3819 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3820 break; 3821 case IBMVFC_MAD_DRIVER_FAILED: 3822 break; 3823 case IBMVFC_MAD_CRQ_ERROR: 3824 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3825 break; 3826 case IBMVFC_MAD_FAILED: 3827 default: 3828 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3829 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && 3830 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) 3831 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3832 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3833 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3834 else 3835 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3836 3837 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3838 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3839 rsp->status, rsp->error, ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), 3840 rsp->fc_type, ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), 3841 rsp->fc_explain, status); 3842 break; 3843 }; 3844 3845 kref_put(&tgt->kref, ibmvfc_release_tgt); 3846 ibmvfc_free_event(evt); 3847 wake_up(&vhost->work_wait_q); 3848 } 3849 3850 /** 3851 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3852 * @tgt: ibmvfc target struct 3853 * 3854 **/ 3855 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3856 { 3857 struct ibmvfc_query_tgt *query_tgt; 3858 struct ibmvfc_host *vhost = tgt->vhost; 3859 struct ibmvfc_event *evt; 3860 3861 if (vhost->discovery_threads >= disc_threads) 3862 return; 3863 3864 kref_get(&tgt->kref); 3865 evt = ibmvfc_get_event(vhost); 3866 vhost->discovery_threads++; 3867 evt->tgt = tgt; 3868 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3869 query_tgt = &evt->iu.query_tgt; 3870 memset(query_tgt, 0, sizeof(*query_tgt)); 3871 query_tgt->common.version = cpu_to_be32(1); 3872 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); 3873 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); 3874 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); 3875 3876 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3877 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3878 vhost->discovery_threads--; 3879 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3880 kref_put(&tgt->kref, ibmvfc_release_tgt); 3881 } else 3882 tgt_dbg(tgt, "Sent Query Target\n"); 3883 } 3884 3885 /** 3886 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3887 * @vhost: ibmvfc host struct 3888 * @scsi_id: SCSI ID to allocate target for 3889 * 3890 * Returns: 3891 * 0 on success / other on failure 3892 **/ 3893 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3894 { 3895 struct ibmvfc_target *tgt; 3896 unsigned long flags; 3897 3898 spin_lock_irqsave(vhost->host->host_lock, flags); 3899 list_for_each_entry(tgt, &vhost->targets, queue) { 3900 if (tgt->scsi_id == scsi_id) { 3901 if (tgt->need_login) 3902 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3903 goto unlock_out; 3904 } 3905 } 3906 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3907 3908 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3909 memset(tgt, 0, sizeof(*tgt)); 3910 tgt->scsi_id = scsi_id; 3911 tgt->new_scsi_id = scsi_id; 3912 tgt->vhost = vhost; 3913 tgt->need_login = 1; 3914 tgt->cancel_key = vhost->task_set++; 3915 init_timer(&tgt->timer); 3916 kref_init(&tgt->kref); 3917 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3918 spin_lock_irqsave(vhost->host->host_lock, flags); 3919 list_add_tail(&tgt->queue, &vhost->targets); 3920 3921 unlock_out: 3922 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3923 return 0; 3924 } 3925 3926 /** 3927 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3928 * @vhost: ibmvfc host struct 3929 * 3930 * Returns: 3931 * 0 on success / other on failure 3932 **/ 3933 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3934 { 3935 int i, rc; 3936 3937 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3938 rc = ibmvfc_alloc_target(vhost, 3939 be32_to_cpu(vhost->disc_buf->scsi_id[i]) & 3940 IBMVFC_DISC_TGT_SCSI_ID_MASK); 3941 3942 return rc; 3943 } 3944 3945 /** 3946 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3947 * @evt: ibmvfc event struct 3948 * 3949 **/ 3950 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3951 { 3952 struct ibmvfc_host *vhost = evt->vhost; 3953 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3954 u32 mad_status = be16_to_cpu(rsp->common.status); 3955 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3956 3957 switch (mad_status) { 3958 case IBMVFC_MAD_SUCCESS: 3959 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3960 vhost->num_targets = be32_to_cpu(rsp->num_written); 3961 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3962 break; 3963 case IBMVFC_MAD_FAILED: 3964 level += ibmvfc_retry_host_init(vhost); 3965 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 3966 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3967 rsp->status, rsp->error); 3968 break; 3969 case IBMVFC_MAD_DRIVER_FAILED: 3970 break; 3971 default: 3972 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3973 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3974 break; 3975 } 3976 3977 ibmvfc_free_event(evt); 3978 wake_up(&vhost->work_wait_q); 3979 } 3980 3981 /** 3982 * ibmvfc_discover_targets - Send Discover Targets MAD 3983 * @vhost: ibmvfc host struct 3984 * 3985 **/ 3986 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3987 { 3988 struct ibmvfc_discover_targets *mad; 3989 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3990 3991 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3992 mad = &evt->iu.discover_targets; 3993 memset(mad, 0, sizeof(*mad)); 3994 mad->common.version = cpu_to_be32(1); 3995 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); 3996 mad->common.length = cpu_to_be16(sizeof(*mad)); 3997 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz); 3998 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma); 3999 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz); 4000 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4001 4002 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4003 ibmvfc_dbg(vhost, "Sent discover targets\n"); 4004 else 4005 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4006 } 4007 4008 /** 4009 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 4010 * @evt: ibmvfc event struct 4011 * 4012 **/ 4013 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 4014 { 4015 struct ibmvfc_host *vhost = evt->vhost; 4016 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); 4017 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 4018 unsigned int npiv_max_sectors; 4019 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4020 4021 switch (mad_status) { 4022 case IBMVFC_MAD_SUCCESS: 4023 ibmvfc_free_event(evt); 4024 break; 4025 case IBMVFC_MAD_FAILED: 4026 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4027 level += ibmvfc_retry_host_init(vhost); 4028 else 4029 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4030 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 4031 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4032 rsp->status, rsp->error); 4033 ibmvfc_free_event(evt); 4034 return; 4035 case IBMVFC_MAD_CRQ_ERROR: 4036 ibmvfc_retry_host_init(vhost); 4037 case IBMVFC_MAD_DRIVER_FAILED: 4038 ibmvfc_free_event(evt); 4039 return; 4040 default: 4041 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 4042 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4043 ibmvfc_free_event(evt); 4044 return; 4045 } 4046 4047 vhost->client_migrated = 0; 4048 4049 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { 4050 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 4051 rsp->flags); 4052 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4053 wake_up(&vhost->work_wait_q); 4054 return; 4055 } 4056 4057 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { 4058 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 4059 rsp->max_cmds); 4060 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4061 wake_up(&vhost->work_wait_q); 4062 return; 4063 } 4064 4065 vhost->logged_in = 1; 4066 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); 4067 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 4068 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 4069 rsp->drc_name, npiv_max_sectors); 4070 4071 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); 4072 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); 4073 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); 4074 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); 4075 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 4076 fc_host_supported_classes(vhost->host) = 0; 4077 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) 4078 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 4079 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) 4080 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 4081 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) 4082 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 4083 fc_host_maxframe_size(vhost->host) = 4084 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; 4085 4086 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; 4087 vhost->host->max_sectors = npiv_max_sectors; 4088 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4089 wake_up(&vhost->work_wait_q); 4090 } 4091 4092 /** 4093 * ibmvfc_npiv_login - Sends NPIV login 4094 * @vhost: ibmvfc host struct 4095 * 4096 **/ 4097 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 4098 { 4099 struct ibmvfc_npiv_login_mad *mad; 4100 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4101 4102 ibmvfc_gather_partition_info(vhost); 4103 ibmvfc_set_login_info(vhost); 4104 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 4105 4106 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 4107 mad = &evt->iu.npiv_login; 4108 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 4109 mad->common.version = cpu_to_be32(1); 4110 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); 4111 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); 4112 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); 4113 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); 4114 4115 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4116 4117 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4118 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 4119 else 4120 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4121 }; 4122 4123 /** 4124 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 4125 * @vhost: ibmvfc host struct 4126 * 4127 **/ 4128 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 4129 { 4130 struct ibmvfc_host *vhost = evt->vhost; 4131 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); 4132 4133 ibmvfc_free_event(evt); 4134 4135 switch (mad_status) { 4136 case IBMVFC_MAD_SUCCESS: 4137 if (list_empty(&vhost->sent) && 4138 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 4139 ibmvfc_init_host(vhost); 4140 return; 4141 } 4142 break; 4143 case IBMVFC_MAD_FAILED: 4144 case IBMVFC_MAD_NOT_SUPPORTED: 4145 case IBMVFC_MAD_CRQ_ERROR: 4146 case IBMVFC_MAD_DRIVER_FAILED: 4147 default: 4148 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 4149 break; 4150 } 4151 4152 ibmvfc_hard_reset_host(vhost); 4153 } 4154 4155 /** 4156 * ibmvfc_npiv_logout - Issue an NPIV Logout 4157 * @vhost: ibmvfc host struct 4158 * 4159 **/ 4160 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 4161 { 4162 struct ibmvfc_npiv_logout_mad *mad; 4163 struct ibmvfc_event *evt; 4164 4165 evt = ibmvfc_get_event(vhost); 4166 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 4167 4168 mad = &evt->iu.npiv_logout; 4169 memset(mad, 0, sizeof(*mad)); 4170 mad->common.version = cpu_to_be32(1); 4171 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); 4172 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); 4173 4174 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 4175 4176 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4177 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 4178 else 4179 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4180 } 4181 4182 /** 4183 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 4184 * @vhost: ibmvfc host struct 4185 * 4186 * Returns: 4187 * 1 if work to do / 0 if not 4188 **/ 4189 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 4190 { 4191 struct ibmvfc_target *tgt; 4192 4193 list_for_each_entry(tgt, &vhost->targets, queue) { 4194 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 4195 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4196 return 1; 4197 } 4198 4199 return 0; 4200 } 4201 4202 /** 4203 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 4204 * @vhost: ibmvfc host struct 4205 * 4206 * Returns: 4207 * 1 if work to do / 0 if not 4208 **/ 4209 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4210 { 4211 struct ibmvfc_target *tgt; 4212 4213 if (kthread_should_stop()) 4214 return 1; 4215 switch (vhost->action) { 4216 case IBMVFC_HOST_ACTION_NONE: 4217 case IBMVFC_HOST_ACTION_INIT_WAIT: 4218 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4219 return 0; 4220 case IBMVFC_HOST_ACTION_TGT_INIT: 4221 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4222 if (vhost->discovery_threads == disc_threads) 4223 return 0; 4224 list_for_each_entry(tgt, &vhost->targets, queue) 4225 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 4226 return 1; 4227 list_for_each_entry(tgt, &vhost->targets, queue) 4228 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4229 return 0; 4230 return 1; 4231 case IBMVFC_HOST_ACTION_LOGO: 4232 case IBMVFC_HOST_ACTION_INIT: 4233 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4234 case IBMVFC_HOST_ACTION_TGT_DEL: 4235 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4236 case IBMVFC_HOST_ACTION_QUERY: 4237 case IBMVFC_HOST_ACTION_RESET: 4238 case IBMVFC_HOST_ACTION_REENABLE: 4239 default: 4240 break; 4241 }; 4242 4243 return 1; 4244 } 4245 4246 /** 4247 * ibmvfc_work_to_do - Is there task level work to do? 4248 * @vhost: ibmvfc host struct 4249 * 4250 * Returns: 4251 * 1 if work to do / 0 if not 4252 **/ 4253 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4254 { 4255 unsigned long flags; 4256 int rc; 4257 4258 spin_lock_irqsave(vhost->host->host_lock, flags); 4259 rc = __ibmvfc_work_to_do(vhost); 4260 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4261 return rc; 4262 } 4263 4264 /** 4265 * ibmvfc_log_ae - Log async events if necessary 4266 * @vhost: ibmvfc host struct 4267 * @events: events to log 4268 * 4269 **/ 4270 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 4271 { 4272 if (events & IBMVFC_AE_RSCN) 4273 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 4274 if ((events & IBMVFC_AE_LINKDOWN) && 4275 vhost->state >= IBMVFC_HALTED) 4276 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 4277 if ((events & IBMVFC_AE_LINKUP) && 4278 vhost->state == IBMVFC_INITIALIZING) 4279 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 4280 } 4281 4282 /** 4283 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 4284 * @tgt: ibmvfc target struct 4285 * 4286 **/ 4287 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 4288 { 4289 struct ibmvfc_host *vhost = tgt->vhost; 4290 struct fc_rport *rport; 4291 unsigned long flags; 4292 4293 tgt_dbg(tgt, "Adding rport\n"); 4294 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 4295 spin_lock_irqsave(vhost->host->host_lock, flags); 4296 4297 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4298 tgt_dbg(tgt, "Deleting rport\n"); 4299 list_del(&tgt->queue); 4300 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4301 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4302 fc_remote_port_delete(rport); 4303 del_timer_sync(&tgt->timer); 4304 kref_put(&tgt->kref, ibmvfc_release_tgt); 4305 return; 4306 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 4307 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4308 return; 4309 } 4310 4311 if (rport) { 4312 tgt_dbg(tgt, "rport add succeeded\n"); 4313 tgt->rport = rport; 4314 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; 4315 rport->supported_classes = 0; 4316 tgt->target_id = rport->scsi_target_id; 4317 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) 4318 rport->supported_classes |= FC_COS_CLASS1; 4319 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) 4320 rport->supported_classes |= FC_COS_CLASS2; 4321 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) 4322 rport->supported_classes |= FC_COS_CLASS3; 4323 if (rport->rqst_q) 4324 blk_queue_max_segments(rport->rqst_q, 1); 4325 } else 4326 tgt_dbg(tgt, "rport add failed\n"); 4327 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4328 } 4329 4330 /** 4331 * ibmvfc_do_work - Do task level work 4332 * @vhost: ibmvfc host struct 4333 * 4334 **/ 4335 static void ibmvfc_do_work(struct ibmvfc_host *vhost) 4336 { 4337 struct ibmvfc_target *tgt; 4338 unsigned long flags; 4339 struct fc_rport *rport; 4340 int rc; 4341 4342 ibmvfc_log_ae(vhost, vhost->events_to_log); 4343 spin_lock_irqsave(vhost->host->host_lock, flags); 4344 vhost->events_to_log = 0; 4345 switch (vhost->action) { 4346 case IBMVFC_HOST_ACTION_NONE: 4347 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4348 case IBMVFC_HOST_ACTION_INIT_WAIT: 4349 break; 4350 case IBMVFC_HOST_ACTION_RESET: 4351 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4352 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4353 rc = ibmvfc_reset_crq(vhost); 4354 spin_lock_irqsave(vhost->host->host_lock, flags); 4355 if (rc == H_CLOSED) 4356 vio_enable_interrupts(to_vio_dev(vhost->dev)); 4357 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 4358 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 4359 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4360 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 4361 } 4362 break; 4363 case IBMVFC_HOST_ACTION_REENABLE: 4364 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4365 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4366 rc = ibmvfc_reenable_crq_queue(vhost); 4367 spin_lock_irqsave(vhost->host->host_lock, flags); 4368 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 4369 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4370 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 4371 } 4372 break; 4373 case IBMVFC_HOST_ACTION_LOGO: 4374 vhost->job_step(vhost); 4375 break; 4376 case IBMVFC_HOST_ACTION_INIT: 4377 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 4378 if (vhost->delay_init) { 4379 vhost->delay_init = 0; 4380 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4381 ssleep(15); 4382 return; 4383 } else 4384 vhost->job_step(vhost); 4385 break; 4386 case IBMVFC_HOST_ACTION_QUERY: 4387 list_for_each_entry(tgt, &vhost->targets, queue) 4388 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 4389 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 4390 break; 4391 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4392 list_for_each_entry(tgt, &vhost->targets, queue) { 4393 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4394 tgt->job_step(tgt); 4395 break; 4396 } 4397 } 4398 4399 if (!ibmvfc_dev_init_to_do(vhost)) 4400 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 4401 break; 4402 case IBMVFC_HOST_ACTION_TGT_DEL: 4403 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4404 list_for_each_entry(tgt, &vhost->targets, queue) { 4405 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4406 tgt_dbg(tgt, "Deleting rport\n"); 4407 rport = tgt->rport; 4408 tgt->rport = NULL; 4409 list_del(&tgt->queue); 4410 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4411 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4412 if (rport) 4413 fc_remote_port_delete(rport); 4414 del_timer_sync(&tgt->timer); 4415 kref_put(&tgt->kref, ibmvfc_release_tgt); 4416 return; 4417 } 4418 } 4419 4420 if (vhost->state == IBMVFC_INITIALIZING) { 4421 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 4422 if (vhost->reinit) { 4423 vhost->reinit = 0; 4424 scsi_block_requests(vhost->host); 4425 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4426 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4427 } else { 4428 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 4429 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4430 wake_up(&vhost->init_wait_q); 4431 schedule_work(&vhost->rport_add_work_q); 4432 vhost->init_retries = 0; 4433 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4434 scsi_unblock_requests(vhost->host); 4435 } 4436 4437 return; 4438 } else { 4439 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 4440 vhost->job_step = ibmvfc_discover_targets; 4441 } 4442 } else { 4443 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4444 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4445 scsi_unblock_requests(vhost->host); 4446 wake_up(&vhost->init_wait_q); 4447 return; 4448 } 4449 break; 4450 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4451 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4452 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4453 ibmvfc_alloc_targets(vhost); 4454 spin_lock_irqsave(vhost->host->host_lock, flags); 4455 break; 4456 case IBMVFC_HOST_ACTION_TGT_INIT: 4457 list_for_each_entry(tgt, &vhost->targets, queue) { 4458 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4459 tgt->job_step(tgt); 4460 break; 4461 } 4462 } 4463 4464 if (!ibmvfc_dev_init_to_do(vhost)) 4465 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4466 break; 4467 default: 4468 break; 4469 }; 4470 4471 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4472 } 4473 4474 /** 4475 * ibmvfc_work - Do task level work 4476 * @data: ibmvfc host struct 4477 * 4478 * Returns: 4479 * zero 4480 **/ 4481 static int ibmvfc_work(void *data) 4482 { 4483 struct ibmvfc_host *vhost = data; 4484 int rc; 4485 4486 set_user_nice(current, MIN_NICE); 4487 4488 while (1) { 4489 rc = wait_event_interruptible(vhost->work_wait_q, 4490 ibmvfc_work_to_do(vhost)); 4491 4492 BUG_ON(rc); 4493 4494 if (kthread_should_stop()) 4495 break; 4496 4497 ibmvfc_do_work(vhost); 4498 } 4499 4500 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4501 return 0; 4502 } 4503 4504 /** 4505 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4506 * @vhost: ibmvfc host struct 4507 * 4508 * Allocates a page for messages, maps it for dma, and registers 4509 * the crq with the hypervisor. 4510 * 4511 * Return value: 4512 * zero on success / other on failure 4513 **/ 4514 static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4515 { 4516 int rc, retrc = -ENOMEM; 4517 struct device *dev = vhost->dev; 4518 struct vio_dev *vdev = to_vio_dev(dev); 4519 struct ibmvfc_crq_queue *crq = &vhost->crq; 4520 4521 ENTER; 4522 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4523 4524 if (!crq->msgs) 4525 return -ENOMEM; 4526 4527 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4528 crq->msg_token = dma_map_single(dev, crq->msgs, 4529 PAGE_SIZE, DMA_BIDIRECTIONAL); 4530 4531 if (dma_mapping_error(dev, crq->msg_token)) 4532 goto map_failed; 4533 4534 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4535 crq->msg_token, PAGE_SIZE); 4536 4537 if (rc == H_RESOURCE) 4538 /* maybe kexecing and resource is busy. try a reset */ 4539 retrc = rc = ibmvfc_reset_crq(vhost); 4540 4541 if (rc == H_CLOSED) 4542 dev_warn(dev, "Partner adapter not ready\n"); 4543 else if (rc) { 4544 dev_warn(dev, "Error %d opening adapter\n", rc); 4545 goto reg_crq_failed; 4546 } 4547 4548 retrc = 0; 4549 4550 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4551 4552 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4553 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4554 goto req_irq_failed; 4555 } 4556 4557 if ((rc = vio_enable_interrupts(vdev))) { 4558 dev_err(dev, "Error %d enabling interrupts\n", rc); 4559 goto req_irq_failed; 4560 } 4561 4562 crq->cur = 0; 4563 LEAVE; 4564 return retrc; 4565 4566 req_irq_failed: 4567 tasklet_kill(&vhost->tasklet); 4568 do { 4569 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4570 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4571 reg_crq_failed: 4572 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4573 map_failed: 4574 free_page((unsigned long)crq->msgs); 4575 return retrc; 4576 } 4577 4578 /** 4579 * ibmvfc_free_mem - Free memory for vhost 4580 * @vhost: ibmvfc host struct 4581 * 4582 * Return value: 4583 * none 4584 **/ 4585 static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4586 { 4587 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4588 4589 ENTER; 4590 mempool_destroy(vhost->tgt_pool); 4591 kfree(vhost->trace); 4592 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4593 vhost->disc_buf_dma); 4594 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4595 vhost->login_buf, vhost->login_buf_dma); 4596 dma_pool_destroy(vhost->sg_pool); 4597 dma_unmap_single(vhost->dev, async_q->msg_token, 4598 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4599 free_page((unsigned long)async_q->msgs); 4600 LEAVE; 4601 } 4602 4603 /** 4604 * ibmvfc_alloc_mem - Allocate memory for vhost 4605 * @vhost: ibmvfc host struct 4606 * 4607 * Return value: 4608 * 0 on success / non-zero on failure 4609 **/ 4610 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4611 { 4612 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4613 struct device *dev = vhost->dev; 4614 4615 ENTER; 4616 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4617 if (!async_q->msgs) { 4618 dev_err(dev, "Couldn't allocate async queue.\n"); 4619 goto nomem; 4620 } 4621 4622 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4623 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4624 async_q->size * sizeof(*async_q->msgs), 4625 DMA_BIDIRECTIONAL); 4626 4627 if (dma_mapping_error(dev, async_q->msg_token)) { 4628 dev_err(dev, "Failed to map async queue\n"); 4629 goto free_async_crq; 4630 } 4631 4632 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4633 SG_ALL * sizeof(struct srp_direct_buf), 4634 sizeof(struct srp_direct_buf), 0); 4635 4636 if (!vhost->sg_pool) { 4637 dev_err(dev, "Failed to allocate sg pool\n"); 4638 goto unmap_async_crq; 4639 } 4640 4641 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4642 &vhost->login_buf_dma, GFP_KERNEL); 4643 4644 if (!vhost->login_buf) { 4645 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4646 goto free_sg_pool; 4647 } 4648 4649 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4650 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4651 &vhost->disc_buf_dma, GFP_KERNEL); 4652 4653 if (!vhost->disc_buf) { 4654 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4655 goto free_login_buffer; 4656 } 4657 4658 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4659 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4660 4661 if (!vhost->trace) 4662 goto free_disc_buffer; 4663 4664 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4665 sizeof(struct ibmvfc_target)); 4666 4667 if (!vhost->tgt_pool) { 4668 dev_err(dev, "Couldn't allocate target memory pool\n"); 4669 goto free_trace; 4670 } 4671 4672 LEAVE; 4673 return 0; 4674 4675 free_trace: 4676 kfree(vhost->trace); 4677 free_disc_buffer: 4678 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4679 vhost->disc_buf_dma); 4680 free_login_buffer: 4681 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4682 vhost->login_buf, vhost->login_buf_dma); 4683 free_sg_pool: 4684 dma_pool_destroy(vhost->sg_pool); 4685 unmap_async_crq: 4686 dma_unmap_single(dev, async_q->msg_token, 4687 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4688 free_async_crq: 4689 free_page((unsigned long)async_q->msgs); 4690 nomem: 4691 LEAVE; 4692 return -ENOMEM; 4693 } 4694 4695 /** 4696 * ibmvfc_rport_add_thread - Worker thread for rport adds 4697 * @work: work struct 4698 * 4699 **/ 4700 static void ibmvfc_rport_add_thread(struct work_struct *work) 4701 { 4702 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4703 rport_add_work_q); 4704 struct ibmvfc_target *tgt; 4705 struct fc_rport *rport; 4706 unsigned long flags; 4707 int did_work; 4708 4709 ENTER; 4710 spin_lock_irqsave(vhost->host->host_lock, flags); 4711 do { 4712 did_work = 0; 4713 if (vhost->state != IBMVFC_ACTIVE) 4714 break; 4715 4716 list_for_each_entry(tgt, &vhost->targets, queue) { 4717 if (tgt->add_rport) { 4718 did_work = 1; 4719 tgt->add_rport = 0; 4720 kref_get(&tgt->kref); 4721 rport = tgt->rport; 4722 if (!rport) { 4723 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4724 ibmvfc_tgt_add_rport(tgt); 4725 } else if (get_device(&rport->dev)) { 4726 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4727 tgt_dbg(tgt, "Setting rport roles\n"); 4728 fc_remote_port_rolechg(rport, tgt->ids.roles); 4729 put_device(&rport->dev); 4730 } else { 4731 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4732 } 4733 4734 kref_put(&tgt->kref, ibmvfc_release_tgt); 4735 spin_lock_irqsave(vhost->host->host_lock, flags); 4736 break; 4737 } 4738 } 4739 } while(did_work); 4740 4741 if (vhost->state == IBMVFC_ACTIVE) 4742 vhost->scan_complete = 1; 4743 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4744 LEAVE; 4745 } 4746 4747 /** 4748 * ibmvfc_probe - Adapter hot plug add entry point 4749 * @vdev: vio device struct 4750 * @id: vio device id struct 4751 * 4752 * Return value: 4753 * 0 on success / non-zero on failure 4754 **/ 4755 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4756 { 4757 struct ibmvfc_host *vhost; 4758 struct Scsi_Host *shost; 4759 struct device *dev = &vdev->dev; 4760 int rc = -ENOMEM; 4761 4762 ENTER; 4763 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4764 if (!shost) { 4765 dev_err(dev, "Couldn't allocate host data\n"); 4766 goto out; 4767 } 4768 4769 shost->transportt = ibmvfc_transport_template; 4770 shost->can_queue = max_requests; 4771 shost->max_lun = max_lun; 4772 shost->max_id = max_targets; 4773 shost->max_sectors = IBMVFC_MAX_SECTORS; 4774 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4775 shost->unique_id = shost->host_no; 4776 4777 vhost = shost_priv(shost); 4778 INIT_LIST_HEAD(&vhost->sent); 4779 INIT_LIST_HEAD(&vhost->free); 4780 INIT_LIST_HEAD(&vhost->targets); 4781 sprintf(vhost->name, IBMVFC_NAME); 4782 vhost->host = shost; 4783 vhost->dev = dev; 4784 vhost->partition_number = -1; 4785 vhost->log_level = log_level; 4786 vhost->task_set = 1; 4787 strcpy(vhost->partition_name, "UNKNOWN"); 4788 init_waitqueue_head(&vhost->work_wait_q); 4789 init_waitqueue_head(&vhost->init_wait_q); 4790 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4791 mutex_init(&vhost->passthru_mutex); 4792 4793 if ((rc = ibmvfc_alloc_mem(vhost))) 4794 goto free_scsi_host; 4795 4796 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4797 shost->host_no); 4798 4799 if (IS_ERR(vhost->work_thread)) { 4800 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4801 PTR_ERR(vhost->work_thread)); 4802 goto free_host_mem; 4803 } 4804 4805 if ((rc = ibmvfc_init_crq(vhost))) { 4806 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4807 goto kill_kthread; 4808 } 4809 4810 if ((rc = ibmvfc_init_event_pool(vhost))) { 4811 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4812 goto release_crq; 4813 } 4814 4815 if ((rc = scsi_add_host(shost, dev))) 4816 goto release_event_pool; 4817 4818 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 4819 4820 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4821 &ibmvfc_trace_attr))) { 4822 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4823 goto remove_shost; 4824 } 4825 4826 if (shost_to_fc_host(shost)->rqst_q) 4827 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 4828 dev_set_drvdata(dev, vhost); 4829 spin_lock(&ibmvfc_driver_lock); 4830 list_add_tail(&vhost->queue, &ibmvfc_head); 4831 spin_unlock(&ibmvfc_driver_lock); 4832 4833 ibmvfc_send_crq_init(vhost); 4834 scsi_scan_host(shost); 4835 return 0; 4836 4837 remove_shost: 4838 scsi_remove_host(shost); 4839 release_event_pool: 4840 ibmvfc_free_event_pool(vhost); 4841 release_crq: 4842 ibmvfc_release_crq_queue(vhost); 4843 kill_kthread: 4844 kthread_stop(vhost->work_thread); 4845 free_host_mem: 4846 ibmvfc_free_mem(vhost); 4847 free_scsi_host: 4848 scsi_host_put(shost); 4849 out: 4850 LEAVE; 4851 return rc; 4852 } 4853 4854 /** 4855 * ibmvfc_remove - Adapter hot plug remove entry point 4856 * @vdev: vio device struct 4857 * 4858 * Return value: 4859 * 0 4860 **/ 4861 static int ibmvfc_remove(struct vio_dev *vdev) 4862 { 4863 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4864 unsigned long flags; 4865 4866 ENTER; 4867 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4868 4869 spin_lock_irqsave(vhost->host->host_lock, flags); 4870 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4871 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4872 4873 ibmvfc_wait_while_resetting(vhost); 4874 ibmvfc_release_crq_queue(vhost); 4875 kthread_stop(vhost->work_thread); 4876 fc_remove_host(vhost->host); 4877 scsi_remove_host(vhost->host); 4878 4879 spin_lock_irqsave(vhost->host->host_lock, flags); 4880 ibmvfc_purge_requests(vhost, DID_ERROR); 4881 ibmvfc_free_event_pool(vhost); 4882 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4883 4884 ibmvfc_free_mem(vhost); 4885 spin_lock(&ibmvfc_driver_lock); 4886 list_del(&vhost->queue); 4887 spin_unlock(&ibmvfc_driver_lock); 4888 scsi_host_put(vhost->host); 4889 LEAVE; 4890 return 0; 4891 } 4892 4893 /** 4894 * ibmvfc_resume - Resume from suspend 4895 * @dev: device struct 4896 * 4897 * We may have lost an interrupt across suspend/resume, so kick the 4898 * interrupt handler 4899 * 4900 */ 4901 static int ibmvfc_resume(struct device *dev) 4902 { 4903 unsigned long flags; 4904 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 4905 struct vio_dev *vdev = to_vio_dev(dev); 4906 4907 spin_lock_irqsave(vhost->host->host_lock, flags); 4908 vio_disable_interrupts(vdev); 4909 tasklet_schedule(&vhost->tasklet); 4910 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4911 return 0; 4912 } 4913 4914 /** 4915 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4916 * @vdev: vio device struct 4917 * 4918 * Return value: 4919 * Number of bytes the driver will need to DMA map at the same time in 4920 * order to perform well. 4921 */ 4922 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4923 { 4924 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4925 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4926 } 4927 4928 static const struct vio_device_id ibmvfc_device_table[] = { 4929 {"fcp", "IBM,vfc-client"}, 4930 { "", "" } 4931 }; 4932 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4933 4934 static const struct dev_pm_ops ibmvfc_pm_ops = { 4935 .resume = ibmvfc_resume 4936 }; 4937 4938 static struct vio_driver ibmvfc_driver = { 4939 .id_table = ibmvfc_device_table, 4940 .probe = ibmvfc_probe, 4941 .remove = ibmvfc_remove, 4942 .get_desired_dma = ibmvfc_get_desired_dma, 4943 .name = IBMVFC_NAME, 4944 .pm = &ibmvfc_pm_ops, 4945 }; 4946 4947 static struct fc_function_template ibmvfc_transport_functions = { 4948 .show_host_fabric_name = 1, 4949 .show_host_node_name = 1, 4950 .show_host_port_name = 1, 4951 .show_host_supported_classes = 1, 4952 .show_host_port_type = 1, 4953 .show_host_port_id = 1, 4954 .show_host_maxframe_size = 1, 4955 4956 .get_host_port_state = ibmvfc_get_host_port_state, 4957 .show_host_port_state = 1, 4958 4959 .get_host_speed = ibmvfc_get_host_speed, 4960 .show_host_speed = 1, 4961 4962 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4963 .terminate_rport_io = ibmvfc_terminate_rport_io, 4964 4965 .show_rport_maxframe_size = 1, 4966 .show_rport_supported_classes = 1, 4967 4968 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4969 .show_rport_dev_loss_tmo = 1, 4970 4971 .get_starget_node_name = ibmvfc_get_starget_node_name, 4972 .show_starget_node_name = 1, 4973 4974 .get_starget_port_name = ibmvfc_get_starget_port_name, 4975 .show_starget_port_name = 1, 4976 4977 .get_starget_port_id = ibmvfc_get_starget_port_id, 4978 .show_starget_port_id = 1, 4979 4980 .bsg_request = ibmvfc_bsg_request, 4981 .bsg_timeout = ibmvfc_bsg_timeout, 4982 }; 4983 4984 /** 4985 * ibmvfc_module_init - Initialize the ibmvfc module 4986 * 4987 * Return value: 4988 * 0 on success / other on failure 4989 **/ 4990 static int __init ibmvfc_module_init(void) 4991 { 4992 int rc; 4993 4994 if (!firmware_has_feature(FW_FEATURE_VIO)) 4995 return -ENODEV; 4996 4997 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4998 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4999 5000 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 5001 if (!ibmvfc_transport_template) 5002 return -ENOMEM; 5003 5004 rc = vio_register_driver(&ibmvfc_driver); 5005 if (rc) 5006 fc_release_transport(ibmvfc_transport_template); 5007 return rc; 5008 } 5009 5010 /** 5011 * ibmvfc_module_exit - Teardown the ibmvfc module 5012 * 5013 * Return value: 5014 * nothing 5015 **/ 5016 static void __exit ibmvfc_module_exit(void) 5017 { 5018 vio_unregister_driver(&ibmvfc_driver); 5019 fc_release_transport(ibmvfc_transport_template); 5020 } 5021 5022 module_init(ibmvfc_module_init); 5023 module_exit(ibmvfc_module_exit); 5024