1 /* 2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 3 * 4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 5 * 6 * Copyright (C) IBM Corporation, 2008 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24 #include <linux/module.h> 25 #include <linux/moduleparam.h> 26 #include <linux/dma-mapping.h> 27 #include <linux/dmapool.h> 28 #include <linux/delay.h> 29 #include <linux/interrupt.h> 30 #include <linux/kthread.h> 31 #include <linux/slab.h> 32 #include <linux/of.h> 33 #include <linux/pm.h> 34 #include <linux/stringify.h> 35 #include <asm/firmware.h> 36 #include <asm/irq.h> 37 #include <asm/vio.h> 38 #include <scsi/scsi.h> 39 #include <scsi/scsi_cmnd.h> 40 #include <scsi/scsi_host.h> 41 #include <scsi/scsi_device.h> 42 #include <scsi/scsi_tcq.h> 43 #include <scsi/scsi_transport_fc.h> 44 #include <scsi/scsi_bsg_fc.h> 45 #include "ibmvfc.h" 46 47 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 48 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 49 static u64 max_lun = IBMVFC_MAX_LUN; 50 static unsigned int max_targets = IBMVFC_MAX_TARGETS; 51 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 52 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 53 static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 54 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 55 static unsigned int cls3_error = IBMVFC_CLS3_ERROR; 56 static LIST_HEAD(ibmvfc_head); 57 static DEFINE_SPINLOCK(ibmvfc_driver_lock); 58 static struct scsi_transport_template *ibmvfc_transport_template; 59 60 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 61 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 62 MODULE_LICENSE("GPL"); 63 MODULE_VERSION(IBMVFC_DRIVER_VERSION); 64 65 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 66 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 67 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 68 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 69 MODULE_PARM_DESC(default_timeout, 70 "Default timeout in seconds for initialization and EH commands. " 71 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 72 module_param_named(max_requests, max_requests, uint, S_IRUGO); 73 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 74 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 75 module_param_named(max_lun, max_lun, ullong, S_IRUGO); 76 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 77 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 78 module_param_named(max_targets, max_targets, uint, S_IRUGO); 79 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 80 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 81 module_param_named(disc_threads, disc_threads, uint, S_IRUGO); 82 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 83 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 84 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 85 MODULE_PARM_DESC(debug, "Enable driver debug information. " 86 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 87 module_param_named(log_level, log_level, uint, 0); 88 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 89 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 90 module_param_named(cls3_error, cls3_error, uint, 0); 91 MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. " 92 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]"); 93 94 static const struct { 95 u16 status; 96 u16 error; 97 u8 result; 98 u8 retry; 99 int log; 100 char *name; 101 } cmd_status [] = { 102 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 103 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 104 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 105 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 106 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 107 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 108 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 109 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 110 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 111 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 112 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 115 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 116 117 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 118 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 119 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 120 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 121 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 122 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 123 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 124 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 125 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 126 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 127 128 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 129 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 130 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 131 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 132 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 133 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 134 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 135 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 136 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 137 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 138 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 139 140 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 141 }; 142 143 static void ibmvfc_npiv_login(struct ibmvfc_host *); 144 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 145 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 146 static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 147 static void ibmvfc_npiv_logout(struct ibmvfc_host *); 148 149 static const char *unknown_error = "unknown error"; 150 151 #ifdef CONFIG_SCSI_IBMVFC_TRACE 152 /** 153 * ibmvfc_trc_start - Log a start trace entry 154 * @evt: ibmvfc event struct 155 * 156 **/ 157 static void ibmvfc_trc_start(struct ibmvfc_event *evt) 158 { 159 struct ibmvfc_host *vhost = evt->vhost; 160 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 161 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 162 struct ibmvfc_trace_entry *entry; 163 164 entry = &vhost->trace[vhost->trace_index++]; 165 entry->evt = evt; 166 entry->time = jiffies; 167 entry->fmt = evt->crq.format; 168 entry->type = IBMVFC_TRC_START; 169 170 switch (entry->fmt) { 171 case IBMVFC_CMD_FORMAT: 172 entry->op_code = vfc_cmd->iu.cdb[0]; 173 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 174 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 175 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 176 entry->u.start.xfer_len = be32_to_cpu(vfc_cmd->iu.xfer_len); 177 break; 178 case IBMVFC_MAD_FORMAT: 179 entry->op_code = be32_to_cpu(mad->opcode); 180 break; 181 default: 182 break; 183 }; 184 } 185 186 /** 187 * ibmvfc_trc_end - Log an end trace entry 188 * @evt: ibmvfc event struct 189 * 190 **/ 191 static void ibmvfc_trc_end(struct ibmvfc_event *evt) 192 { 193 struct ibmvfc_host *vhost = evt->vhost; 194 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 195 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 196 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; 197 198 entry->evt = evt; 199 entry->time = jiffies; 200 entry->fmt = evt->crq.format; 201 entry->type = IBMVFC_TRC_END; 202 203 switch (entry->fmt) { 204 case IBMVFC_CMD_FORMAT: 205 entry->op_code = vfc_cmd->iu.cdb[0]; 206 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 207 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 208 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 209 entry->u.end.status = be16_to_cpu(vfc_cmd->status); 210 entry->u.end.error = be16_to_cpu(vfc_cmd->error); 211 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; 212 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; 213 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; 214 break; 215 case IBMVFC_MAD_FORMAT: 216 entry->op_code = be32_to_cpu(mad->opcode); 217 entry->u.end.status = be16_to_cpu(mad->status); 218 break; 219 default: 220 break; 221 222 }; 223 } 224 225 #else 226 #define ibmvfc_trc_start(evt) do { } while (0) 227 #define ibmvfc_trc_end(evt) do { } while (0) 228 #endif 229 230 /** 231 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 232 * @status: status / error class 233 * @error: error 234 * 235 * Return value: 236 * index into cmd_status / -EINVAL on failure 237 **/ 238 static int ibmvfc_get_err_index(u16 status, u16 error) 239 { 240 int i; 241 242 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 243 if ((cmd_status[i].status & status) == cmd_status[i].status && 244 cmd_status[i].error == error) 245 return i; 246 247 return -EINVAL; 248 } 249 250 /** 251 * ibmvfc_get_cmd_error - Find the error description for the fcp response 252 * @status: status / error class 253 * @error: error 254 * 255 * Return value: 256 * error description string 257 **/ 258 static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 259 { 260 int rc = ibmvfc_get_err_index(status, error); 261 if (rc >= 0) 262 return cmd_status[rc].name; 263 return unknown_error; 264 } 265 266 /** 267 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 268 * @vfc_cmd: ibmvfc command struct 269 * 270 * Return value: 271 * SCSI result value to return for completed command 272 **/ 273 static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) 274 { 275 int err; 276 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 277 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 278 279 if ((rsp->flags & FCP_RSP_LEN_VALID) && 280 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 281 rsp->data.info.rsp_code)) 282 return DID_ERROR << 16; 283 284 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 285 if (err >= 0) 286 return rsp->scsi_status | (cmd_status[err].result << 16); 287 return rsp->scsi_status | (DID_ERROR << 16); 288 } 289 290 /** 291 * ibmvfc_retry_cmd - Determine if error status is retryable 292 * @status: status / error class 293 * @error: error 294 * 295 * Return value: 296 * 1 if error should be retried / 0 if it should not 297 **/ 298 static int ibmvfc_retry_cmd(u16 status, u16 error) 299 { 300 int rc = ibmvfc_get_err_index(status, error); 301 302 if (rc >= 0) 303 return cmd_status[rc].retry; 304 return 1; 305 } 306 307 static const char *unknown_fc_explain = "unknown fc explain"; 308 309 static const struct { 310 u16 fc_explain; 311 char *name; 312 } ls_explain [] = { 313 { 0x00, "no additional explanation" }, 314 { 0x01, "service parameter error - options" }, 315 { 0x03, "service parameter error - initiator control" }, 316 { 0x05, "service parameter error - recipient control" }, 317 { 0x07, "service parameter error - received data field size" }, 318 { 0x09, "service parameter error - concurrent seq" }, 319 { 0x0B, "service parameter error - credit" }, 320 { 0x0D, "invalid N_Port/F_Port_Name" }, 321 { 0x0E, "invalid node/Fabric Name" }, 322 { 0x0F, "invalid common service parameters" }, 323 { 0x11, "invalid association header" }, 324 { 0x13, "association header required" }, 325 { 0x15, "invalid originator S_ID" }, 326 { 0x17, "invalid OX_ID-RX-ID combination" }, 327 { 0x19, "command (request) already in progress" }, 328 { 0x1E, "N_Port Login requested" }, 329 { 0x1F, "Invalid N_Port_ID" }, 330 }; 331 332 static const struct { 333 u16 fc_explain; 334 char *name; 335 } gs_explain [] = { 336 { 0x00, "no additional explanation" }, 337 { 0x01, "port identifier not registered" }, 338 { 0x02, "port name not registered" }, 339 { 0x03, "node name not registered" }, 340 { 0x04, "class of service not registered" }, 341 { 0x06, "initial process associator not registered" }, 342 { 0x07, "FC-4 TYPEs not registered" }, 343 { 0x08, "symbolic port name not registered" }, 344 { 0x09, "symbolic node name not registered" }, 345 { 0x0A, "port type not registered" }, 346 { 0xF0, "authorization exception" }, 347 { 0xF1, "authentication exception" }, 348 { 0xF2, "data base full" }, 349 { 0xF3, "data base empty" }, 350 { 0xF4, "processing request" }, 351 { 0xF5, "unable to verify connection" }, 352 { 0xF6, "devices not in a common zone" }, 353 }; 354 355 /** 356 * ibmvfc_get_ls_explain - Return the FC Explain description text 357 * @status: FC Explain status 358 * 359 * Returns: 360 * error string 361 **/ 362 static const char *ibmvfc_get_ls_explain(u16 status) 363 { 364 int i; 365 366 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 367 if (ls_explain[i].fc_explain == status) 368 return ls_explain[i].name; 369 370 return unknown_fc_explain; 371 } 372 373 /** 374 * ibmvfc_get_gs_explain - Return the FC Explain description text 375 * @status: FC Explain status 376 * 377 * Returns: 378 * error string 379 **/ 380 static const char *ibmvfc_get_gs_explain(u16 status) 381 { 382 int i; 383 384 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 385 if (gs_explain[i].fc_explain == status) 386 return gs_explain[i].name; 387 388 return unknown_fc_explain; 389 } 390 391 static const struct { 392 enum ibmvfc_fc_type fc_type; 393 char *name; 394 } fc_type [] = { 395 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 396 { IBMVFC_PORT_REJECT, "port reject" }, 397 { IBMVFC_LS_REJECT, "ELS reject" }, 398 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 399 { IBMVFC_PORT_BUSY, "port busy" }, 400 { IBMVFC_BASIC_REJECT, "basic reject" }, 401 }; 402 403 static const char *unknown_fc_type = "unknown fc type"; 404 405 /** 406 * ibmvfc_get_fc_type - Return the FC Type description text 407 * @status: FC Type error status 408 * 409 * Returns: 410 * error string 411 **/ 412 static const char *ibmvfc_get_fc_type(u16 status) 413 { 414 int i; 415 416 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 417 if (fc_type[i].fc_type == status) 418 return fc_type[i].name; 419 420 return unknown_fc_type; 421 } 422 423 /** 424 * ibmvfc_set_tgt_action - Set the next init action for the target 425 * @tgt: ibmvfc target struct 426 * @action: action to perform 427 * 428 **/ 429 static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 430 enum ibmvfc_target_action action) 431 { 432 switch (tgt->action) { 433 case IBMVFC_TGT_ACTION_DEL_RPORT: 434 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) 435 tgt->action = action; 436 case IBMVFC_TGT_ACTION_DELETED_RPORT: 437 break; 438 default: 439 if (action == IBMVFC_TGT_ACTION_DEL_RPORT) 440 tgt->add_rport = 0; 441 tgt->action = action; 442 break; 443 } 444 } 445 446 /** 447 * ibmvfc_set_host_state - Set the state for the host 448 * @vhost: ibmvfc host struct 449 * @state: state to set host to 450 * 451 * Returns: 452 * 0 if state changed / non-zero if not changed 453 **/ 454 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 455 enum ibmvfc_host_state state) 456 { 457 int rc = 0; 458 459 switch (vhost->state) { 460 case IBMVFC_HOST_OFFLINE: 461 rc = -EINVAL; 462 break; 463 default: 464 vhost->state = state; 465 break; 466 }; 467 468 return rc; 469 } 470 471 /** 472 * ibmvfc_set_host_action - Set the next init action for the host 473 * @vhost: ibmvfc host struct 474 * @action: action to perform 475 * 476 **/ 477 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 478 enum ibmvfc_host_action action) 479 { 480 switch (action) { 481 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 482 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 483 vhost->action = action; 484 break; 485 case IBMVFC_HOST_ACTION_LOGO_WAIT: 486 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 487 vhost->action = action; 488 break; 489 case IBMVFC_HOST_ACTION_INIT_WAIT: 490 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 491 vhost->action = action; 492 break; 493 case IBMVFC_HOST_ACTION_QUERY: 494 switch (vhost->action) { 495 case IBMVFC_HOST_ACTION_INIT_WAIT: 496 case IBMVFC_HOST_ACTION_NONE: 497 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 498 vhost->action = action; 499 break; 500 default: 501 break; 502 }; 503 break; 504 case IBMVFC_HOST_ACTION_TGT_INIT: 505 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 506 vhost->action = action; 507 break; 508 case IBMVFC_HOST_ACTION_INIT: 509 case IBMVFC_HOST_ACTION_TGT_DEL: 510 switch (vhost->action) { 511 case IBMVFC_HOST_ACTION_RESET: 512 case IBMVFC_HOST_ACTION_REENABLE: 513 break; 514 default: 515 vhost->action = action; 516 break; 517 }; 518 break; 519 case IBMVFC_HOST_ACTION_LOGO: 520 case IBMVFC_HOST_ACTION_QUERY_TGTS: 521 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 522 case IBMVFC_HOST_ACTION_NONE: 523 case IBMVFC_HOST_ACTION_RESET: 524 case IBMVFC_HOST_ACTION_REENABLE: 525 default: 526 vhost->action = action; 527 break; 528 }; 529 } 530 531 /** 532 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 533 * @vhost: ibmvfc host struct 534 * 535 * Return value: 536 * nothing 537 **/ 538 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 539 { 540 if (vhost->action == IBMVFC_HOST_ACTION_NONE) { 541 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 542 scsi_block_requests(vhost->host); 543 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 544 } 545 } else 546 vhost->reinit = 1; 547 548 wake_up(&vhost->work_wait_q); 549 } 550 551 /** 552 * ibmvfc_link_down - Handle a link down event from the adapter 553 * @vhost: ibmvfc host struct 554 * @state: ibmvfc host state to enter 555 * 556 **/ 557 static void ibmvfc_link_down(struct ibmvfc_host *vhost, 558 enum ibmvfc_host_state state) 559 { 560 struct ibmvfc_target *tgt; 561 562 ENTER; 563 scsi_block_requests(vhost->host); 564 list_for_each_entry(tgt, &vhost->targets, queue) 565 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 566 ibmvfc_set_host_state(vhost, state); 567 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 568 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 569 wake_up(&vhost->work_wait_q); 570 LEAVE; 571 } 572 573 /** 574 * ibmvfc_init_host - Start host initialization 575 * @vhost: ibmvfc host struct 576 * 577 * Return value: 578 * nothing 579 **/ 580 static void ibmvfc_init_host(struct ibmvfc_host *vhost) 581 { 582 struct ibmvfc_target *tgt; 583 584 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 585 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 586 dev_err(vhost->dev, 587 "Host initialization retries exceeded. Taking adapter offline\n"); 588 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 589 return; 590 } 591 } 592 593 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 594 memset(vhost->async_crq.msgs, 0, PAGE_SIZE); 595 vhost->async_crq.cur = 0; 596 597 list_for_each_entry(tgt, &vhost->targets, queue) 598 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 599 scsi_block_requests(vhost->host); 600 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 601 vhost->job_step = ibmvfc_npiv_login; 602 wake_up(&vhost->work_wait_q); 603 } 604 } 605 606 /** 607 * ibmvfc_send_crq - Send a CRQ 608 * @vhost: ibmvfc host struct 609 * @word1: the first 64 bits of the data 610 * @word2: the second 64 bits of the data 611 * 612 * Return value: 613 * 0 on success / other on failure 614 **/ 615 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 616 { 617 struct vio_dev *vdev = to_vio_dev(vhost->dev); 618 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 619 } 620 621 /** 622 * ibmvfc_send_crq_init - Send a CRQ init message 623 * @vhost: ibmvfc host struct 624 * 625 * Return value: 626 * 0 on success / other on failure 627 **/ 628 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 629 { 630 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 631 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 632 } 633 634 /** 635 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 636 * @vhost: ibmvfc host struct 637 * 638 * Return value: 639 * 0 on success / other on failure 640 **/ 641 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 642 { 643 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 644 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 645 } 646 647 /** 648 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 649 * @vhost: ibmvfc host struct 650 * 651 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 652 * the crq with the hypervisor. 653 **/ 654 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 655 { 656 long rc = 0; 657 struct vio_dev *vdev = to_vio_dev(vhost->dev); 658 struct ibmvfc_crq_queue *crq = &vhost->crq; 659 660 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 661 free_irq(vdev->irq, vhost); 662 tasklet_kill(&vhost->tasklet); 663 do { 664 if (rc) 665 msleep(100); 666 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 667 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 668 669 vhost->state = IBMVFC_NO_CRQ; 670 vhost->logged_in = 0; 671 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 672 free_page((unsigned long)crq->msgs); 673 } 674 675 /** 676 * ibmvfc_reenable_crq_queue - reenables the CRQ 677 * @vhost: ibmvfc host struct 678 * 679 * Return value: 680 * 0 on success / other on failure 681 **/ 682 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 683 { 684 int rc = 0; 685 struct vio_dev *vdev = to_vio_dev(vhost->dev); 686 687 /* Re-enable the CRQ */ 688 do { 689 if (rc) 690 msleep(100); 691 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 692 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 693 694 if (rc) 695 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 696 697 return rc; 698 } 699 700 /** 701 * ibmvfc_reset_crq - resets a crq after a failure 702 * @vhost: ibmvfc host struct 703 * 704 * Return value: 705 * 0 on success / other on failure 706 **/ 707 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 708 { 709 int rc = 0; 710 unsigned long flags; 711 struct vio_dev *vdev = to_vio_dev(vhost->dev); 712 struct ibmvfc_crq_queue *crq = &vhost->crq; 713 714 /* Close the CRQ */ 715 do { 716 if (rc) 717 msleep(100); 718 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 719 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 720 721 spin_lock_irqsave(vhost->host->host_lock, flags); 722 vhost->state = IBMVFC_NO_CRQ; 723 vhost->logged_in = 0; 724 725 /* Clean out the queue */ 726 memset(crq->msgs, 0, PAGE_SIZE); 727 crq->cur = 0; 728 729 /* And re-open it again */ 730 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 731 crq->msg_token, PAGE_SIZE); 732 733 if (rc == H_CLOSED) 734 /* Adapter is good, but other end is not ready */ 735 dev_warn(vhost->dev, "Partner adapter not ready\n"); 736 else if (rc != 0) 737 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 738 spin_unlock_irqrestore(vhost->host->host_lock, flags); 739 740 return rc; 741 } 742 743 /** 744 * ibmvfc_valid_event - Determines if event is valid. 745 * @pool: event_pool that contains the event 746 * @evt: ibmvfc event to be checked for validity 747 * 748 * Return value: 749 * 1 if event is valid / 0 if event is not valid 750 **/ 751 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 752 struct ibmvfc_event *evt) 753 { 754 int index = evt - pool->events; 755 if (index < 0 || index >= pool->size) /* outside of bounds */ 756 return 0; 757 if (evt != pool->events + index) /* unaligned */ 758 return 0; 759 return 1; 760 } 761 762 /** 763 * ibmvfc_free_event - Free the specified event 764 * @evt: ibmvfc_event to be freed 765 * 766 **/ 767 static void ibmvfc_free_event(struct ibmvfc_event *evt) 768 { 769 struct ibmvfc_host *vhost = evt->vhost; 770 struct ibmvfc_event_pool *pool = &vhost->pool; 771 772 BUG_ON(!ibmvfc_valid_event(pool, evt)); 773 BUG_ON(atomic_inc_return(&evt->free) != 1); 774 list_add_tail(&evt->queue, &vhost->free); 775 } 776 777 /** 778 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 779 * @evt: ibmvfc event struct 780 * 781 * This function does not setup any error status, that must be done 782 * before this function gets called. 783 **/ 784 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 785 { 786 struct scsi_cmnd *cmnd = evt->cmnd; 787 788 if (cmnd) { 789 scsi_dma_unmap(cmnd); 790 cmnd->scsi_done(cmnd); 791 } 792 793 if (evt->eh_comp) 794 complete(evt->eh_comp); 795 796 ibmvfc_free_event(evt); 797 } 798 799 /** 800 * ibmvfc_fail_request - Fail request with specified error code 801 * @evt: ibmvfc event struct 802 * @error_code: error code to fail request with 803 * 804 * Return value: 805 * none 806 **/ 807 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 808 { 809 if (evt->cmnd) { 810 evt->cmnd->result = (error_code << 16); 811 evt->done = ibmvfc_scsi_eh_done; 812 } else 813 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED); 814 815 list_del(&evt->queue); 816 del_timer(&evt->timer); 817 ibmvfc_trc_end(evt); 818 evt->done(evt); 819 } 820 821 /** 822 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 823 * @vhost: ibmvfc host struct 824 * @error_code: error code to fail requests with 825 * 826 * Return value: 827 * none 828 **/ 829 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 830 { 831 struct ibmvfc_event *evt, *pos; 832 833 ibmvfc_dbg(vhost, "Purging all requests\n"); 834 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 835 ibmvfc_fail_request(evt, error_code); 836 } 837 838 /** 839 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 840 * @vhost: struct ibmvfc host to reset 841 **/ 842 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 843 { 844 ibmvfc_purge_requests(vhost, DID_ERROR); 845 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 846 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 847 } 848 849 /** 850 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 851 * @vhost: struct ibmvfc host to reset 852 **/ 853 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 854 { 855 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 856 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 857 scsi_block_requests(vhost->host); 858 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 859 vhost->job_step = ibmvfc_npiv_logout; 860 wake_up(&vhost->work_wait_q); 861 } else 862 ibmvfc_hard_reset_host(vhost); 863 } 864 865 /** 866 * ibmvfc_reset_host - Reset the connection to the server 867 * @vhost: ibmvfc host struct 868 **/ 869 static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 870 { 871 unsigned long flags; 872 873 spin_lock_irqsave(vhost->host->host_lock, flags); 874 __ibmvfc_reset_host(vhost); 875 spin_unlock_irqrestore(vhost->host->host_lock, flags); 876 } 877 878 /** 879 * ibmvfc_retry_host_init - Retry host initialization if allowed 880 * @vhost: ibmvfc host struct 881 * 882 * Returns: 1 if init will be retried / 0 if not 883 * 884 **/ 885 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 886 { 887 int retry = 0; 888 889 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 890 vhost->delay_init = 1; 891 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 892 dev_err(vhost->dev, 893 "Host initialization retries exceeded. Taking adapter offline\n"); 894 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 895 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 896 __ibmvfc_reset_host(vhost); 897 else { 898 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 899 retry = 1; 900 } 901 } 902 903 wake_up(&vhost->work_wait_q); 904 return retry; 905 } 906 907 /** 908 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 909 * @starget: scsi target struct 910 * 911 * Return value: 912 * ibmvfc_target struct / NULL if not found 913 **/ 914 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 915 { 916 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 917 struct ibmvfc_host *vhost = shost_priv(shost); 918 struct ibmvfc_target *tgt; 919 920 list_for_each_entry(tgt, &vhost->targets, queue) 921 if (tgt->target_id == starget->id) { 922 kref_get(&tgt->kref); 923 return tgt; 924 } 925 return NULL; 926 } 927 928 /** 929 * ibmvfc_get_target - Find the specified scsi_target 930 * @starget: scsi target struct 931 * 932 * Return value: 933 * ibmvfc_target struct / NULL if not found 934 **/ 935 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 936 { 937 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 938 struct ibmvfc_target *tgt; 939 unsigned long flags; 940 941 spin_lock_irqsave(shost->host_lock, flags); 942 tgt = __ibmvfc_get_target(starget); 943 spin_unlock_irqrestore(shost->host_lock, flags); 944 return tgt; 945 } 946 947 /** 948 * ibmvfc_get_host_speed - Get host port speed 949 * @shost: scsi host struct 950 * 951 * Return value: 952 * none 953 **/ 954 static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 955 { 956 struct ibmvfc_host *vhost = shost_priv(shost); 957 unsigned long flags; 958 959 spin_lock_irqsave(shost->host_lock, flags); 960 if (vhost->state == IBMVFC_ACTIVE) { 961 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) { 962 case 1: 963 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 964 break; 965 case 2: 966 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 967 break; 968 case 4: 969 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 970 break; 971 case 8: 972 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 973 break; 974 case 10: 975 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 976 break; 977 case 16: 978 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 979 break; 980 default: 981 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 982 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100); 983 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 984 break; 985 } 986 } else 987 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 988 spin_unlock_irqrestore(shost->host_lock, flags); 989 } 990 991 /** 992 * ibmvfc_get_host_port_state - Get host port state 993 * @shost: scsi host struct 994 * 995 * Return value: 996 * none 997 **/ 998 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 999 { 1000 struct ibmvfc_host *vhost = shost_priv(shost); 1001 unsigned long flags; 1002 1003 spin_lock_irqsave(shost->host_lock, flags); 1004 switch (vhost->state) { 1005 case IBMVFC_INITIALIZING: 1006 case IBMVFC_ACTIVE: 1007 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 1008 break; 1009 case IBMVFC_LINK_DOWN: 1010 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 1011 break; 1012 case IBMVFC_LINK_DEAD: 1013 case IBMVFC_HOST_OFFLINE: 1014 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1015 break; 1016 case IBMVFC_HALTED: 1017 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1018 break; 1019 case IBMVFC_NO_CRQ: 1020 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1021 break; 1022 default: 1023 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1024 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1025 break; 1026 } 1027 spin_unlock_irqrestore(shost->host_lock, flags); 1028 } 1029 1030 /** 1031 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1032 * @rport: rport struct 1033 * @timeout: timeout value 1034 * 1035 * Return value: 1036 * none 1037 **/ 1038 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1039 { 1040 if (timeout) 1041 rport->dev_loss_tmo = timeout; 1042 else 1043 rport->dev_loss_tmo = 1; 1044 } 1045 1046 /** 1047 * ibmvfc_release_tgt - Free memory allocated for a target 1048 * @kref: kref struct 1049 * 1050 **/ 1051 static void ibmvfc_release_tgt(struct kref *kref) 1052 { 1053 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1054 kfree(tgt); 1055 } 1056 1057 /** 1058 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1059 * @starget: scsi target struct 1060 * 1061 * Return value: 1062 * none 1063 **/ 1064 static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1065 { 1066 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1067 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1068 if (tgt) 1069 kref_put(&tgt->kref, ibmvfc_release_tgt); 1070 } 1071 1072 /** 1073 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1074 * @starget: scsi target struct 1075 * 1076 * Return value: 1077 * none 1078 **/ 1079 static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1080 { 1081 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1082 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1083 if (tgt) 1084 kref_put(&tgt->kref, ibmvfc_release_tgt); 1085 } 1086 1087 /** 1088 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1089 * @starget: scsi target struct 1090 * 1091 * Return value: 1092 * none 1093 **/ 1094 static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1095 { 1096 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1097 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1098 if (tgt) 1099 kref_put(&tgt->kref, ibmvfc_release_tgt); 1100 } 1101 1102 /** 1103 * ibmvfc_wait_while_resetting - Wait while the host resets 1104 * @vhost: ibmvfc host struct 1105 * 1106 * Return value: 1107 * 0 on success / other on failure 1108 **/ 1109 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1110 { 1111 long timeout = wait_event_timeout(vhost->init_wait_q, 1112 ((vhost->state == IBMVFC_ACTIVE || 1113 vhost->state == IBMVFC_HOST_OFFLINE || 1114 vhost->state == IBMVFC_LINK_DEAD) && 1115 vhost->action == IBMVFC_HOST_ACTION_NONE), 1116 (init_timeout * HZ)); 1117 1118 return timeout ? 0 : -EIO; 1119 } 1120 1121 /** 1122 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1123 * @shost: scsi host struct 1124 * 1125 * Return value: 1126 * 0 on success / other on failure 1127 **/ 1128 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1129 { 1130 struct ibmvfc_host *vhost = shost_priv(shost); 1131 1132 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1133 ibmvfc_reset_host(vhost); 1134 return ibmvfc_wait_while_resetting(vhost); 1135 } 1136 1137 /** 1138 * ibmvfc_gather_partition_info - Gather info about the LPAR 1139 * 1140 * Return value: 1141 * none 1142 **/ 1143 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1144 { 1145 struct device_node *rootdn; 1146 const char *name; 1147 const unsigned int *num; 1148 1149 rootdn = of_find_node_by_path("/"); 1150 if (!rootdn) 1151 return; 1152 1153 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1154 if (name) 1155 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1156 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1157 if (num) 1158 vhost->partition_number = *num; 1159 of_node_put(rootdn); 1160 } 1161 1162 /** 1163 * ibmvfc_set_login_info - Setup info for NPIV login 1164 * @vhost: ibmvfc host struct 1165 * 1166 * Return value: 1167 * none 1168 **/ 1169 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1170 { 1171 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1172 struct device_node *of_node = vhost->dev->of_node; 1173 const char *location; 1174 1175 memset(login_info, 0, sizeof(*login_info)); 1176 1177 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX); 1178 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); 1179 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); 1180 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); 1181 login_info->partition_num = cpu_to_be32(vhost->partition_number); 1182 login_info->vfc_frame_version = cpu_to_be32(1); 1183 login_info->fcp_version = cpu_to_be16(3); 1184 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); 1185 if (vhost->client_migrated) 1186 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); 1187 1188 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ); 1189 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE); 1190 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); 1191 login_info->async.len = cpu_to_be32(vhost->async_crq.size * sizeof(*vhost->async_crq.msgs)); 1192 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1193 strncpy(login_info->device_name, 1194 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1195 1196 location = of_get_property(of_node, "ibm,loc-code", NULL); 1197 location = location ? location : dev_name(vhost->dev); 1198 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1199 } 1200 1201 /** 1202 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1203 * @vhost: ibmvfc host who owns the event pool 1204 * 1205 * Returns zero on success. 1206 **/ 1207 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1208 { 1209 int i; 1210 struct ibmvfc_event_pool *pool = &vhost->pool; 1211 1212 ENTER; 1213 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1214 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1215 if (!pool->events) 1216 return -ENOMEM; 1217 1218 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1219 pool->size * sizeof(*pool->iu_storage), 1220 &pool->iu_token, 0); 1221 1222 if (!pool->iu_storage) { 1223 kfree(pool->events); 1224 return -ENOMEM; 1225 } 1226 1227 for (i = 0; i < pool->size; ++i) { 1228 struct ibmvfc_event *evt = &pool->events[i]; 1229 atomic_set(&evt->free, 1); 1230 evt->crq.valid = 0x80; 1231 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i)); 1232 evt->xfer_iu = pool->iu_storage + i; 1233 evt->vhost = vhost; 1234 evt->ext_list = NULL; 1235 list_add_tail(&evt->queue, &vhost->free); 1236 } 1237 1238 LEAVE; 1239 return 0; 1240 } 1241 1242 /** 1243 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1244 * @vhost: ibmvfc host who owns the event pool 1245 * 1246 **/ 1247 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1248 { 1249 int i; 1250 struct ibmvfc_event_pool *pool = &vhost->pool; 1251 1252 ENTER; 1253 for (i = 0; i < pool->size; ++i) { 1254 list_del(&pool->events[i].queue); 1255 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1256 if (pool->events[i].ext_list) 1257 dma_pool_free(vhost->sg_pool, 1258 pool->events[i].ext_list, 1259 pool->events[i].ext_list_token); 1260 } 1261 1262 kfree(pool->events); 1263 dma_free_coherent(vhost->dev, 1264 pool->size * sizeof(*pool->iu_storage), 1265 pool->iu_storage, pool->iu_token); 1266 LEAVE; 1267 } 1268 1269 /** 1270 * ibmvfc_get_event - Gets the next free event in pool 1271 * @vhost: ibmvfc host struct 1272 * 1273 * Returns a free event from the pool. 1274 **/ 1275 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1276 { 1277 struct ibmvfc_event *evt; 1278 1279 BUG_ON(list_empty(&vhost->free)); 1280 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1281 atomic_set(&evt->free, 0); 1282 list_del(&evt->queue); 1283 return evt; 1284 } 1285 1286 /** 1287 * ibmvfc_init_event - Initialize fields in an event struct that are always 1288 * required. 1289 * @evt: The event 1290 * @done: Routine to call when the event is responded to 1291 * @format: SRP or MAD format 1292 **/ 1293 static void ibmvfc_init_event(struct ibmvfc_event *evt, 1294 void (*done) (struct ibmvfc_event *), u8 format) 1295 { 1296 evt->cmnd = NULL; 1297 evt->sync_iu = NULL; 1298 evt->crq.format = format; 1299 evt->done = done; 1300 evt->eh_comp = NULL; 1301 } 1302 1303 /** 1304 * ibmvfc_map_sg_list - Initialize scatterlist 1305 * @scmd: scsi command struct 1306 * @nseg: number of scatterlist segments 1307 * @md: memory descriptor list to initialize 1308 **/ 1309 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1310 struct srp_direct_buf *md) 1311 { 1312 int i; 1313 struct scatterlist *sg; 1314 1315 scsi_for_each_sg(scmd, sg, nseg, i) { 1316 md[i].va = cpu_to_be64(sg_dma_address(sg)); 1317 md[i].len = cpu_to_be32(sg_dma_len(sg)); 1318 md[i].key = 0; 1319 } 1320 } 1321 1322 /** 1323 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1324 * @scmd: Scsi_Cmnd with the scatterlist 1325 * @evt: ibmvfc event struct 1326 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1327 * @dev: device for which to map dma memory 1328 * 1329 * Returns: 1330 * 0 on success / non-zero on failure 1331 **/ 1332 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1333 struct ibmvfc_event *evt, 1334 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1335 { 1336 1337 int sg_mapped; 1338 struct srp_direct_buf *data = &vfc_cmd->ioba; 1339 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1340 1341 if (cls3_error) 1342 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR); 1343 1344 sg_mapped = scsi_dma_map(scmd); 1345 if (!sg_mapped) { 1346 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC); 1347 return 0; 1348 } else if (unlikely(sg_mapped < 0)) { 1349 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1350 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1351 return sg_mapped; 1352 } 1353 1354 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1355 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE); 1356 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1357 } else { 1358 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ); 1359 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1360 } 1361 1362 if (sg_mapped == 1) { 1363 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1364 return 0; 1365 } 1366 1367 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST); 1368 1369 if (!evt->ext_list) { 1370 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1371 &evt->ext_list_token); 1372 1373 if (!evt->ext_list) { 1374 scsi_dma_unmap(scmd); 1375 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1376 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1377 return -ENOMEM; 1378 } 1379 } 1380 1381 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1382 1383 data->va = cpu_to_be64(evt->ext_list_token); 1384 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf)); 1385 data->key = 0; 1386 return 0; 1387 } 1388 1389 /** 1390 * ibmvfc_timeout - Internal command timeout handler 1391 * @evt: struct ibmvfc_event that timed out 1392 * 1393 * Called when an internally generated command times out 1394 **/ 1395 static void ibmvfc_timeout(struct ibmvfc_event *evt) 1396 { 1397 struct ibmvfc_host *vhost = evt->vhost; 1398 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1399 ibmvfc_reset_host(vhost); 1400 } 1401 1402 /** 1403 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1404 * @evt: event to be sent 1405 * @vhost: ibmvfc host struct 1406 * @timeout: timeout in seconds - 0 means do not time command 1407 * 1408 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1409 **/ 1410 static int ibmvfc_send_event(struct ibmvfc_event *evt, 1411 struct ibmvfc_host *vhost, unsigned long timeout) 1412 { 1413 __be64 *crq_as_u64 = (__be64 *) &evt->crq; 1414 int rc; 1415 1416 /* Copy the IU into the transfer area */ 1417 *evt->xfer_iu = evt->iu; 1418 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1419 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); 1420 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1421 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); 1422 else 1423 BUG(); 1424 1425 list_add_tail(&evt->queue, &vhost->sent); 1426 init_timer(&evt->timer); 1427 1428 if (timeout) { 1429 evt->timer.data = (unsigned long) evt; 1430 evt->timer.expires = jiffies + (timeout * HZ); 1431 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; 1432 add_timer(&evt->timer); 1433 } 1434 1435 mb(); 1436 1437 if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), 1438 be64_to_cpu(crq_as_u64[1])))) { 1439 list_del(&evt->queue); 1440 del_timer(&evt->timer); 1441 1442 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1443 * Firmware will send a CRQ with a transport event (0xFF) to 1444 * tell this client what has happened to the transport. This 1445 * will be handled in ibmvfc_handle_crq() 1446 */ 1447 if (rc == H_CLOSED) { 1448 if (printk_ratelimit()) 1449 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1450 if (evt->cmnd) 1451 scsi_dma_unmap(evt->cmnd); 1452 ibmvfc_free_event(evt); 1453 return SCSI_MLQUEUE_HOST_BUSY; 1454 } 1455 1456 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1457 if (evt->cmnd) { 1458 evt->cmnd->result = DID_ERROR << 16; 1459 evt->done = ibmvfc_scsi_eh_done; 1460 } else 1461 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); 1462 1463 evt->done(evt); 1464 } else 1465 ibmvfc_trc_start(evt); 1466 1467 return 0; 1468 } 1469 1470 /** 1471 * ibmvfc_log_error - Log an error for the failed command if appropriate 1472 * @evt: ibmvfc event to log 1473 * 1474 **/ 1475 static void ibmvfc_log_error(struct ibmvfc_event *evt) 1476 { 1477 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1478 struct ibmvfc_host *vhost = evt->vhost; 1479 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1480 struct scsi_cmnd *cmnd = evt->cmnd; 1481 const char *err = unknown_error; 1482 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 1483 int logerr = 0; 1484 int rsp_code = 0; 1485 1486 if (index >= 0) { 1487 logerr = cmd_status[index].log; 1488 err = cmd_status[index].name; 1489 } 1490 1491 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1492 return; 1493 1494 if (rsp->flags & FCP_RSP_LEN_VALID) 1495 rsp_code = rsp->data.info.rsp_code; 1496 1497 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1498 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1499 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1500 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1501 } 1502 1503 /** 1504 * ibmvfc_relogin - Log back into the specified device 1505 * @sdev: scsi device struct 1506 * 1507 **/ 1508 static void ibmvfc_relogin(struct scsi_device *sdev) 1509 { 1510 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1511 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1512 struct ibmvfc_target *tgt; 1513 1514 list_for_each_entry(tgt, &vhost->targets, queue) { 1515 if (rport == tgt->rport) { 1516 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 1517 break; 1518 } 1519 } 1520 1521 ibmvfc_reinit_host(vhost); 1522 } 1523 1524 /** 1525 * ibmvfc_scsi_done - Handle responses from commands 1526 * @evt: ibmvfc event to be handled 1527 * 1528 * Used as a callback when sending scsi cmds. 1529 **/ 1530 static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1531 { 1532 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1533 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1534 struct scsi_cmnd *cmnd = evt->cmnd; 1535 u32 rsp_len = 0; 1536 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); 1537 1538 if (cmnd) { 1539 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) 1540 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); 1541 else if (rsp->flags & FCP_RESID_UNDER) 1542 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); 1543 else 1544 scsi_set_resid(cmnd, 0); 1545 1546 if (vfc_cmd->status) { 1547 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1548 1549 if (rsp->flags & FCP_RSP_LEN_VALID) 1550 rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 1551 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1552 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1553 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1554 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1555 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && 1556 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) 1557 ibmvfc_relogin(cmnd->device); 1558 1559 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1560 cmnd->result = (DID_ERROR << 16); 1561 1562 ibmvfc_log_error(evt); 1563 } 1564 1565 if (!cmnd->result && 1566 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1567 cmnd->result = (DID_ERROR << 16); 1568 1569 scsi_dma_unmap(cmnd); 1570 cmnd->scsi_done(cmnd); 1571 } 1572 1573 if (evt->eh_comp) 1574 complete(evt->eh_comp); 1575 1576 ibmvfc_free_event(evt); 1577 } 1578 1579 /** 1580 * ibmvfc_host_chkready - Check if the host can accept commands 1581 * @vhost: struct ibmvfc host 1582 * 1583 * Returns: 1584 * 1 if host can accept command / 0 if not 1585 **/ 1586 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1587 { 1588 int result = 0; 1589 1590 switch (vhost->state) { 1591 case IBMVFC_LINK_DEAD: 1592 case IBMVFC_HOST_OFFLINE: 1593 result = DID_NO_CONNECT << 16; 1594 break; 1595 case IBMVFC_NO_CRQ: 1596 case IBMVFC_INITIALIZING: 1597 case IBMVFC_HALTED: 1598 case IBMVFC_LINK_DOWN: 1599 result = DID_REQUEUE << 16; 1600 break; 1601 case IBMVFC_ACTIVE: 1602 result = 0; 1603 break; 1604 }; 1605 1606 return result; 1607 } 1608 1609 /** 1610 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1611 * @cmnd: struct scsi_cmnd to be executed 1612 * @done: Callback function to be called when cmnd is completed 1613 * 1614 * Returns: 1615 * 0 on success / other on failure 1616 **/ 1617 static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd, 1618 void (*done) (struct scsi_cmnd *)) 1619 { 1620 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1621 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1622 struct ibmvfc_cmd *vfc_cmd; 1623 struct ibmvfc_event *evt; 1624 int rc; 1625 1626 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1627 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1628 cmnd->result = rc; 1629 done(cmnd); 1630 return 0; 1631 } 1632 1633 cmnd->result = (DID_OK << 16); 1634 evt = ibmvfc_get_event(vhost); 1635 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1636 evt->cmnd = cmnd; 1637 cmnd->scsi_done = done; 1638 vfc_cmd = &evt->iu.cmd; 1639 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1640 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 1641 vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp)); 1642 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1643 vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu)); 1644 vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp)); 1645 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata); 1646 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); 1647 vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); 1648 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1649 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1650 1651 if (cmnd->flags & SCMD_TAGGED) { 1652 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag); 1653 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1654 } 1655 1656 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1657 return ibmvfc_send_event(evt, vhost, 0); 1658 1659 ibmvfc_free_event(evt); 1660 if (rc == -ENOMEM) 1661 return SCSI_MLQUEUE_HOST_BUSY; 1662 1663 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1664 scmd_printk(KERN_ERR, cmnd, 1665 "Failed to map DMA buffer for command. rc=%d\n", rc); 1666 1667 cmnd->result = DID_ERROR << 16; 1668 done(cmnd); 1669 return 0; 1670 } 1671 1672 static DEF_SCSI_QCMD(ibmvfc_queuecommand) 1673 1674 /** 1675 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1676 * @evt: ibmvfc event struct 1677 * 1678 **/ 1679 static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1680 { 1681 /* copy the response back */ 1682 if (evt->sync_iu) 1683 *evt->sync_iu = *evt->xfer_iu; 1684 1685 complete(&evt->comp); 1686 } 1687 1688 /** 1689 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 1690 * @evt: struct ibmvfc_event 1691 * 1692 **/ 1693 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 1694 { 1695 struct ibmvfc_host *vhost = evt->vhost; 1696 1697 ibmvfc_free_event(evt); 1698 vhost->aborting_passthru = 0; 1699 dev_info(vhost->dev, "Passthru command cancelled\n"); 1700 } 1701 1702 /** 1703 * ibmvfc_bsg_timeout - Handle a BSG timeout 1704 * @job: struct fc_bsg_job that timed out 1705 * 1706 * Returns: 1707 * 0 on success / other on failure 1708 **/ 1709 static int ibmvfc_bsg_timeout(struct fc_bsg_job *job) 1710 { 1711 struct ibmvfc_host *vhost = shost_priv(job->shost); 1712 unsigned long port_id = (unsigned long)job->dd_data; 1713 struct ibmvfc_event *evt; 1714 struct ibmvfc_tmf *tmf; 1715 unsigned long flags; 1716 int rc; 1717 1718 ENTER; 1719 spin_lock_irqsave(vhost->host->host_lock, flags); 1720 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 1721 __ibmvfc_reset_host(vhost); 1722 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1723 return 0; 1724 } 1725 1726 vhost->aborting_passthru = 1; 1727 evt = ibmvfc_get_event(vhost); 1728 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 1729 1730 tmf = &evt->iu.tmf; 1731 memset(tmf, 0, sizeof(*tmf)); 1732 tmf->common.version = cpu_to_be32(1); 1733 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 1734 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 1735 tmf->scsi_id = cpu_to_be64(port_id); 1736 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 1737 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); 1738 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1739 1740 if (rc != 0) { 1741 vhost->aborting_passthru = 0; 1742 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 1743 rc = -EIO; 1744 } else 1745 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 1746 port_id); 1747 1748 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1749 1750 LEAVE; 1751 return rc; 1752 } 1753 1754 /** 1755 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 1756 * @vhost: struct ibmvfc_host to send command 1757 * @port_id: port ID to send command 1758 * 1759 * Returns: 1760 * 0 on success / other on failure 1761 **/ 1762 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 1763 { 1764 struct ibmvfc_port_login *plogi; 1765 struct ibmvfc_target *tgt; 1766 struct ibmvfc_event *evt; 1767 union ibmvfc_iu rsp_iu; 1768 unsigned long flags; 1769 int rc = 0, issue_login = 1; 1770 1771 ENTER; 1772 spin_lock_irqsave(vhost->host->host_lock, flags); 1773 list_for_each_entry(tgt, &vhost->targets, queue) { 1774 if (tgt->scsi_id == port_id) { 1775 issue_login = 0; 1776 break; 1777 } 1778 } 1779 1780 if (!issue_login) 1781 goto unlock_out; 1782 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 1783 goto unlock_out; 1784 1785 evt = ibmvfc_get_event(vhost); 1786 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1787 plogi = &evt->iu.plogi; 1788 memset(plogi, 0, sizeof(*plogi)); 1789 plogi->common.version = cpu_to_be32(1); 1790 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 1791 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 1792 plogi->scsi_id = cpu_to_be64(port_id); 1793 evt->sync_iu = &rsp_iu; 1794 init_completion(&evt->comp); 1795 1796 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1797 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1798 1799 if (rc) 1800 return -EIO; 1801 1802 wait_for_completion(&evt->comp); 1803 1804 if (rsp_iu.plogi.common.status) 1805 rc = -EIO; 1806 1807 spin_lock_irqsave(vhost->host->host_lock, flags); 1808 ibmvfc_free_event(evt); 1809 unlock_out: 1810 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1811 LEAVE; 1812 return rc; 1813 } 1814 1815 /** 1816 * ibmvfc_bsg_request - Handle a BSG request 1817 * @job: struct fc_bsg_job to be executed 1818 * 1819 * Returns: 1820 * 0 on success / other on failure 1821 **/ 1822 static int ibmvfc_bsg_request(struct fc_bsg_job *job) 1823 { 1824 struct ibmvfc_host *vhost = shost_priv(job->shost); 1825 struct fc_rport *rport = job->rport; 1826 struct ibmvfc_passthru_mad *mad; 1827 struct ibmvfc_event *evt; 1828 union ibmvfc_iu rsp_iu; 1829 unsigned long flags, port_id = -1; 1830 unsigned int code = job->request->msgcode; 1831 int rc = 0, req_seg, rsp_seg, issue_login = 0; 1832 u32 fc_flags, rsp_len; 1833 1834 ENTER; 1835 job->reply->reply_payload_rcv_len = 0; 1836 if (rport) 1837 port_id = rport->port_id; 1838 1839 switch (code) { 1840 case FC_BSG_HST_ELS_NOLOGIN: 1841 port_id = (job->request->rqst_data.h_els.port_id[0] << 16) | 1842 (job->request->rqst_data.h_els.port_id[1] << 8) | 1843 job->request->rqst_data.h_els.port_id[2]; 1844 case FC_BSG_RPT_ELS: 1845 fc_flags = IBMVFC_FC_ELS; 1846 break; 1847 case FC_BSG_HST_CT: 1848 issue_login = 1; 1849 port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) | 1850 (job->request->rqst_data.h_ct.port_id[1] << 8) | 1851 job->request->rqst_data.h_ct.port_id[2]; 1852 case FC_BSG_RPT_CT: 1853 fc_flags = IBMVFC_FC_CT_IU; 1854 break; 1855 default: 1856 return -ENOTSUPP; 1857 }; 1858 1859 if (port_id == -1) 1860 return -EINVAL; 1861 if (!mutex_trylock(&vhost->passthru_mutex)) 1862 return -EBUSY; 1863 1864 job->dd_data = (void *)port_id; 1865 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 1866 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1867 1868 if (!req_seg) { 1869 mutex_unlock(&vhost->passthru_mutex); 1870 return -ENOMEM; 1871 } 1872 1873 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 1874 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1875 1876 if (!rsp_seg) { 1877 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1878 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1879 mutex_unlock(&vhost->passthru_mutex); 1880 return -ENOMEM; 1881 } 1882 1883 if (req_seg > 1 || rsp_seg > 1) { 1884 rc = -EINVAL; 1885 goto out; 1886 } 1887 1888 if (issue_login) 1889 rc = ibmvfc_bsg_plogi(vhost, port_id); 1890 1891 spin_lock_irqsave(vhost->host->host_lock, flags); 1892 1893 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 1894 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1895 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1896 goto out; 1897 } 1898 1899 evt = ibmvfc_get_event(vhost); 1900 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1901 mad = &evt->iu.passthru; 1902 1903 memset(mad, 0, sizeof(*mad)); 1904 mad->common.version = cpu_to_be32(1); 1905 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 1906 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 1907 1908 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + 1909 offsetof(struct ibmvfc_passthru_mad, iu)); 1910 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 1911 1912 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); 1913 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); 1914 mad->iu.flags = cpu_to_be32(fc_flags); 1915 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 1916 1917 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); 1918 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); 1919 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); 1920 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); 1921 mad->iu.scsi_id = cpu_to_be64(port_id); 1922 mad->iu.tag = cpu_to_be64((u64)evt); 1923 rsp_len = be32_to_cpu(mad->iu.rsp.len); 1924 1925 evt->sync_iu = &rsp_iu; 1926 init_completion(&evt->comp); 1927 rc = ibmvfc_send_event(evt, vhost, 0); 1928 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1929 1930 if (rc) { 1931 rc = -EIO; 1932 goto out; 1933 } 1934 1935 wait_for_completion(&evt->comp); 1936 1937 if (rsp_iu.passthru.common.status) 1938 rc = -EIO; 1939 else 1940 job->reply->reply_payload_rcv_len = rsp_len; 1941 1942 spin_lock_irqsave(vhost->host->host_lock, flags); 1943 ibmvfc_free_event(evt); 1944 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1945 job->reply->result = rc; 1946 job->job_done(job); 1947 rc = 0; 1948 out: 1949 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1950 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1951 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 1952 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1953 mutex_unlock(&vhost->passthru_mutex); 1954 LEAVE; 1955 return rc; 1956 } 1957 1958 /** 1959 * ibmvfc_reset_device - Reset the device with the specified reset type 1960 * @sdev: scsi device to reset 1961 * @type: reset type 1962 * @desc: reset type description for log messages 1963 * 1964 * Returns: 1965 * 0 on success / other on failure 1966 **/ 1967 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1968 { 1969 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1970 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1971 struct ibmvfc_cmd *tmf; 1972 struct ibmvfc_event *evt = NULL; 1973 union ibmvfc_iu rsp_iu; 1974 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1975 int rsp_rc = -EBUSY; 1976 unsigned long flags; 1977 int rsp_code = 0; 1978 1979 spin_lock_irqsave(vhost->host->host_lock, flags); 1980 if (vhost->state == IBMVFC_ACTIVE) { 1981 evt = ibmvfc_get_event(vhost); 1982 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1983 1984 tmf = &evt->iu.cmd; 1985 memset(tmf, 0, sizeof(*tmf)); 1986 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 1987 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); 1988 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1989 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); 1990 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); 1991 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 1992 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); 1993 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1994 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 1995 tmf->iu.tmf_flags = type; 1996 evt->sync_iu = &rsp_iu; 1997 1998 init_completion(&evt->comp); 1999 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2000 } 2001 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2002 2003 if (rsp_rc != 0) { 2004 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 2005 desc, rsp_rc); 2006 return -EIO; 2007 } 2008 2009 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2010 wait_for_completion(&evt->comp); 2011 2012 if (rsp_iu.cmd.status) 2013 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2014 2015 if (rsp_code) { 2016 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2017 rsp_code = fc_rsp->data.info.rsp_code; 2018 2019 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2020 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, 2021 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2022 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2023 fc_rsp->scsi_status); 2024 rsp_rc = -EIO; 2025 } else 2026 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2027 2028 spin_lock_irqsave(vhost->host->host_lock, flags); 2029 ibmvfc_free_event(evt); 2030 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2031 return rsp_rc; 2032 } 2033 2034 /** 2035 * ibmvfc_match_rport - Match function for specified remote port 2036 * @evt: ibmvfc event struct 2037 * @device: device to match (rport) 2038 * 2039 * Returns: 2040 * 1 if event matches rport / 0 if event does not match rport 2041 **/ 2042 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2043 { 2044 struct fc_rport *cmd_rport; 2045 2046 if (evt->cmnd) { 2047 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2048 if (cmd_rport == rport) 2049 return 1; 2050 } 2051 return 0; 2052 } 2053 2054 /** 2055 * ibmvfc_match_target - Match function for specified target 2056 * @evt: ibmvfc event struct 2057 * @device: device to match (starget) 2058 * 2059 * Returns: 2060 * 1 if event matches starget / 0 if event does not match starget 2061 **/ 2062 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2063 { 2064 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2065 return 1; 2066 return 0; 2067 } 2068 2069 /** 2070 * ibmvfc_match_lun - Match function for specified LUN 2071 * @evt: ibmvfc event struct 2072 * @device: device to match (sdev) 2073 * 2074 * Returns: 2075 * 1 if event matches sdev / 0 if event does not match sdev 2076 **/ 2077 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2078 { 2079 if (evt->cmnd && evt->cmnd->device == device) 2080 return 1; 2081 return 0; 2082 } 2083 2084 /** 2085 * ibmvfc_wait_for_ops - Wait for ops to complete 2086 * @vhost: ibmvfc host struct 2087 * @device: device to match (starget or sdev) 2088 * @match: match function 2089 * 2090 * Returns: 2091 * SUCCESS / FAILED 2092 **/ 2093 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2094 int (*match) (struct ibmvfc_event *, void *)) 2095 { 2096 struct ibmvfc_event *evt; 2097 DECLARE_COMPLETION_ONSTACK(comp); 2098 int wait; 2099 unsigned long flags; 2100 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2101 2102 ENTER; 2103 do { 2104 wait = 0; 2105 spin_lock_irqsave(vhost->host->host_lock, flags); 2106 list_for_each_entry(evt, &vhost->sent, queue) { 2107 if (match(evt, device)) { 2108 evt->eh_comp = ∁ 2109 wait++; 2110 } 2111 } 2112 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2113 2114 if (wait) { 2115 timeout = wait_for_completion_timeout(&comp, timeout); 2116 2117 if (!timeout) { 2118 wait = 0; 2119 spin_lock_irqsave(vhost->host->host_lock, flags); 2120 list_for_each_entry(evt, &vhost->sent, queue) { 2121 if (match(evt, device)) { 2122 evt->eh_comp = NULL; 2123 wait++; 2124 } 2125 } 2126 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2127 if (wait) 2128 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2129 LEAVE; 2130 return wait ? FAILED : SUCCESS; 2131 } 2132 } 2133 } while (wait); 2134 2135 LEAVE; 2136 return SUCCESS; 2137 } 2138 2139 /** 2140 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2141 * @sdev: scsi device to cancel commands 2142 * @type: type of error recovery being performed 2143 * 2144 * This sends a cancel to the VIOS for the specified device. This does 2145 * NOT send any abort to the actual device. That must be done separately. 2146 * 2147 * Returns: 2148 * 0 on success / other on failure 2149 **/ 2150 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2151 { 2152 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2153 struct scsi_target *starget = scsi_target(sdev); 2154 struct fc_rport *rport = starget_to_rport(starget); 2155 struct ibmvfc_tmf *tmf; 2156 struct ibmvfc_event *evt, *found_evt; 2157 union ibmvfc_iu rsp; 2158 int rsp_rc = -EBUSY; 2159 unsigned long flags; 2160 u16 status; 2161 2162 ENTER; 2163 spin_lock_irqsave(vhost->host->host_lock, flags); 2164 found_evt = NULL; 2165 list_for_each_entry(evt, &vhost->sent, queue) { 2166 if (evt->cmnd && evt->cmnd->device == sdev) { 2167 found_evt = evt; 2168 break; 2169 } 2170 } 2171 2172 if (!found_evt) { 2173 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2174 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2175 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2176 return 0; 2177 } 2178 2179 if (vhost->logged_in) { 2180 evt = ibmvfc_get_event(vhost); 2181 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2182 2183 tmf = &evt->iu.tmf; 2184 memset(tmf, 0, sizeof(*tmf)); 2185 tmf->common.version = cpu_to_be32(1); 2186 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2187 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2188 tmf->scsi_id = cpu_to_be64(rport->port_id); 2189 int_to_scsilun(sdev->lun, &tmf->lun); 2190 if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS)) 2191 type &= ~IBMVFC_TMF_SUPPRESS_ABTS; 2192 if (vhost->state == IBMVFC_ACTIVE) 2193 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); 2194 else 2195 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); 2196 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2197 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); 2198 2199 evt->sync_iu = &rsp; 2200 init_completion(&evt->comp); 2201 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2202 } 2203 2204 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2205 2206 if (rsp_rc != 0) { 2207 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2208 /* If failure is received, the host adapter is most likely going 2209 through reset, return success so the caller will wait for the command 2210 being cancelled to get returned */ 2211 return 0; 2212 } 2213 2214 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2215 2216 wait_for_completion(&evt->comp); 2217 status = be16_to_cpu(rsp.mad_common.status); 2218 spin_lock_irqsave(vhost->host->host_lock, flags); 2219 ibmvfc_free_event(evt); 2220 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2221 2222 if (status != IBMVFC_MAD_SUCCESS) { 2223 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2224 switch (status) { 2225 case IBMVFC_MAD_DRIVER_FAILED: 2226 case IBMVFC_MAD_CRQ_ERROR: 2227 /* Host adapter most likely going through reset, return success to 2228 the caller will wait for the command being cancelled to get returned */ 2229 return 0; 2230 default: 2231 return -EIO; 2232 }; 2233 } 2234 2235 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2236 return 0; 2237 } 2238 2239 /** 2240 * ibmvfc_match_key - Match function for specified cancel key 2241 * @evt: ibmvfc event struct 2242 * @key: cancel key to match 2243 * 2244 * Returns: 2245 * 1 if event matches key / 0 if event does not match key 2246 **/ 2247 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2248 { 2249 unsigned long cancel_key = (unsigned long)key; 2250 2251 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2252 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) 2253 return 1; 2254 return 0; 2255 } 2256 2257 /** 2258 * ibmvfc_match_evt - Match function for specified event 2259 * @evt: ibmvfc event struct 2260 * @match: event to match 2261 * 2262 * Returns: 2263 * 1 if event matches key / 0 if event does not match key 2264 **/ 2265 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) 2266 { 2267 if (evt == match) 2268 return 1; 2269 return 0; 2270 } 2271 2272 /** 2273 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2274 * @sdev: scsi device to abort commands 2275 * 2276 * This sends an Abort Task Set to the VIOS for the specified device. This does 2277 * NOT send any cancel to the VIOS. That must be done separately. 2278 * 2279 * Returns: 2280 * 0 on success / other on failure 2281 **/ 2282 static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2283 { 2284 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2285 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2286 struct ibmvfc_cmd *tmf; 2287 struct ibmvfc_event *evt, *found_evt; 2288 union ibmvfc_iu rsp_iu; 2289 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 2290 int rc, rsp_rc = -EBUSY; 2291 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2292 int rsp_code = 0; 2293 2294 spin_lock_irqsave(vhost->host->host_lock, flags); 2295 found_evt = NULL; 2296 list_for_each_entry(evt, &vhost->sent, queue) { 2297 if (evt->cmnd && evt->cmnd->device == sdev) { 2298 found_evt = evt; 2299 break; 2300 } 2301 } 2302 2303 if (!found_evt) { 2304 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2305 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2306 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2307 return 0; 2308 } 2309 2310 if (vhost->state == IBMVFC_ACTIVE) { 2311 evt = ibmvfc_get_event(vhost); 2312 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2313 2314 tmf = &evt->iu.cmd; 2315 memset(tmf, 0, sizeof(*tmf)); 2316 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 2317 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); 2318 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 2319 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); 2320 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); 2321 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2322 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); 2323 int_to_scsilun(sdev->lun, &tmf->iu.lun); 2324 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2325 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 2326 evt->sync_iu = &rsp_iu; 2327 2328 init_completion(&evt->comp); 2329 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2330 } 2331 2332 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2333 2334 if (rsp_rc != 0) { 2335 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2336 return -EIO; 2337 } 2338 2339 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2340 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2341 2342 if (!timeout) { 2343 rc = ibmvfc_cancel_all(sdev, 0); 2344 if (!rc) { 2345 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2346 if (rc == SUCCESS) 2347 rc = 0; 2348 } 2349 2350 if (rc) { 2351 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2352 ibmvfc_reset_host(vhost); 2353 rsp_rc = -EIO; 2354 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2355 2356 if (rc == SUCCESS) 2357 rsp_rc = 0; 2358 2359 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); 2360 if (rc != SUCCESS) { 2361 spin_lock_irqsave(vhost->host->host_lock, flags); 2362 ibmvfc_hard_reset_host(vhost); 2363 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2364 rsp_rc = 0; 2365 } 2366 2367 goto out; 2368 } 2369 } 2370 2371 if (rsp_iu.cmd.status) 2372 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2373 2374 if (rsp_code) { 2375 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2376 rsp_code = fc_rsp->data.info.rsp_code; 2377 2378 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2379 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2380 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2381 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2382 fc_rsp->scsi_status); 2383 rsp_rc = -EIO; 2384 } else 2385 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2386 2387 out: 2388 spin_lock_irqsave(vhost->host->host_lock, flags); 2389 ibmvfc_free_event(evt); 2390 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2391 return rsp_rc; 2392 } 2393 2394 /** 2395 * ibmvfc_eh_abort_handler - Abort a command 2396 * @cmd: scsi command to abort 2397 * 2398 * Returns: 2399 * SUCCESS / FAST_IO_FAIL / FAILED 2400 **/ 2401 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2402 { 2403 struct scsi_device *sdev = cmd->device; 2404 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2405 int cancel_rc, block_rc; 2406 int rc = FAILED; 2407 2408 ENTER; 2409 block_rc = fc_block_scsi_eh(cmd); 2410 ibmvfc_wait_while_resetting(vhost); 2411 if (block_rc != FAST_IO_FAIL) { 2412 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2413 ibmvfc_abort_task_set(sdev); 2414 } else 2415 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2416 2417 if (!cancel_rc) 2418 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2419 2420 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2421 rc = FAST_IO_FAIL; 2422 2423 LEAVE; 2424 return rc; 2425 } 2426 2427 /** 2428 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2429 * @cmd: scsi command struct 2430 * 2431 * Returns: 2432 * SUCCESS / FAST_IO_FAIL / FAILED 2433 **/ 2434 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2435 { 2436 struct scsi_device *sdev = cmd->device; 2437 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2438 int cancel_rc, block_rc, reset_rc = 0; 2439 int rc = FAILED; 2440 2441 ENTER; 2442 block_rc = fc_block_scsi_eh(cmd); 2443 ibmvfc_wait_while_resetting(vhost); 2444 if (block_rc != FAST_IO_FAIL) { 2445 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2446 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2447 } else 2448 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2449 2450 if (!cancel_rc && !reset_rc) 2451 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2452 2453 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2454 rc = FAST_IO_FAIL; 2455 2456 LEAVE; 2457 return rc; 2458 } 2459 2460 /** 2461 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function 2462 * @sdev: scsi device struct 2463 * @data: return code 2464 * 2465 **/ 2466 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) 2467 { 2468 unsigned long *rc = data; 2469 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2470 } 2471 2472 /** 2473 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2474 * @sdev: scsi device struct 2475 * @data: return code 2476 * 2477 **/ 2478 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2479 { 2480 unsigned long *rc = data; 2481 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2482 } 2483 2484 /** 2485 * ibmvfc_eh_target_reset_handler - Reset the target 2486 * @cmd: scsi command struct 2487 * 2488 * Returns: 2489 * SUCCESS / FAST_IO_FAIL / FAILED 2490 **/ 2491 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2492 { 2493 struct scsi_device *sdev = cmd->device; 2494 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2495 struct scsi_target *starget = scsi_target(sdev); 2496 int block_rc; 2497 int reset_rc = 0; 2498 int rc = FAILED; 2499 unsigned long cancel_rc = 0; 2500 2501 ENTER; 2502 block_rc = fc_block_scsi_eh(cmd); 2503 ibmvfc_wait_while_resetting(vhost); 2504 if (block_rc != FAST_IO_FAIL) { 2505 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2506 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2507 } else 2508 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); 2509 2510 if (!cancel_rc && !reset_rc) 2511 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2512 2513 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2514 rc = FAST_IO_FAIL; 2515 2516 LEAVE; 2517 return rc; 2518 } 2519 2520 /** 2521 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2522 * @cmd: struct scsi_cmnd having problems 2523 * 2524 **/ 2525 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2526 { 2527 int rc, block_rc; 2528 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2529 2530 block_rc = fc_block_scsi_eh(cmd); 2531 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2532 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2533 2534 if (block_rc == FAST_IO_FAIL) 2535 return FAST_IO_FAIL; 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_abort_handler = ibmvfc_eh_abort_handler, 3090 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3091 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3092 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3093 .slave_alloc = ibmvfc_slave_alloc, 3094 .slave_configure = ibmvfc_slave_configure, 3095 .target_alloc = ibmvfc_target_alloc, 3096 .scan_finished = ibmvfc_scan_finished, 3097 .change_queue_depth = ibmvfc_change_queue_depth, 3098 .cmd_per_lun = 16, 3099 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3100 .this_id = -1, 3101 .sg_tablesize = SG_ALL, 3102 .max_sectors = IBMVFC_MAX_SECTORS, 3103 .use_clustering = ENABLE_CLUSTERING, 3104 .shost_attrs = ibmvfc_attrs, 3105 .track_queue_depth = 1, 3106 }; 3107 3108 /** 3109 * ibmvfc_next_async_crq - Returns the next entry in async queue 3110 * @vhost: ibmvfc host struct 3111 * 3112 * Returns: 3113 * Pointer to next entry in queue / NULL if empty 3114 **/ 3115 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3116 { 3117 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 3118 struct ibmvfc_async_crq *crq; 3119 3120 crq = &async_crq->msgs[async_crq->cur]; 3121 if (crq->valid & 0x80) { 3122 if (++async_crq->cur == async_crq->size) 3123 async_crq->cur = 0; 3124 rmb(); 3125 } else 3126 crq = NULL; 3127 3128 return crq; 3129 } 3130 3131 /** 3132 * ibmvfc_next_crq - Returns the next entry in message queue 3133 * @vhost: ibmvfc host struct 3134 * 3135 * Returns: 3136 * Pointer to next entry in queue / NULL if empty 3137 **/ 3138 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3139 { 3140 struct ibmvfc_crq_queue *queue = &vhost->crq; 3141 struct ibmvfc_crq *crq; 3142 3143 crq = &queue->msgs[queue->cur]; 3144 if (crq->valid & 0x80) { 3145 if (++queue->cur == queue->size) 3146 queue->cur = 0; 3147 rmb(); 3148 } else 3149 crq = NULL; 3150 3151 return crq; 3152 } 3153 3154 /** 3155 * ibmvfc_interrupt - Interrupt handler 3156 * @irq: number of irq to handle, not used 3157 * @dev_instance: ibmvfc_host that received interrupt 3158 * 3159 * Returns: 3160 * IRQ_HANDLED 3161 **/ 3162 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3163 { 3164 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3165 unsigned long flags; 3166 3167 spin_lock_irqsave(vhost->host->host_lock, flags); 3168 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3169 tasklet_schedule(&vhost->tasklet); 3170 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3171 return IRQ_HANDLED; 3172 } 3173 3174 /** 3175 * ibmvfc_tasklet - Interrupt handler tasklet 3176 * @data: ibmvfc host struct 3177 * 3178 * Returns: 3179 * Nothing 3180 **/ 3181 static void ibmvfc_tasklet(void *data) 3182 { 3183 struct ibmvfc_host *vhost = data; 3184 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3185 struct ibmvfc_crq *crq; 3186 struct ibmvfc_async_crq *async; 3187 unsigned long flags; 3188 int done = 0; 3189 3190 spin_lock_irqsave(vhost->host->host_lock, flags); 3191 while (!done) { 3192 /* Pull all the valid messages off the async CRQ */ 3193 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3194 ibmvfc_handle_async(async, vhost); 3195 async->valid = 0; 3196 wmb(); 3197 } 3198 3199 /* Pull all the valid messages off the CRQ */ 3200 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3201 ibmvfc_handle_crq(crq, vhost); 3202 crq->valid = 0; 3203 wmb(); 3204 } 3205 3206 vio_enable_interrupts(vdev); 3207 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3208 vio_disable_interrupts(vdev); 3209 ibmvfc_handle_async(async, vhost); 3210 async->valid = 0; 3211 wmb(); 3212 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3213 vio_disable_interrupts(vdev); 3214 ibmvfc_handle_crq(crq, vhost); 3215 crq->valid = 0; 3216 wmb(); 3217 } else 3218 done = 1; 3219 } 3220 3221 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3222 } 3223 3224 /** 3225 * ibmvfc_init_tgt - Set the next init job step for the target 3226 * @tgt: ibmvfc target struct 3227 * @job_step: job step to perform 3228 * 3229 **/ 3230 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3231 void (*job_step) (struct ibmvfc_target *)) 3232 { 3233 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 3234 tgt->job_step = job_step; 3235 wake_up(&tgt->vhost->work_wait_q); 3236 } 3237 3238 /** 3239 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3240 * @tgt: ibmvfc target struct 3241 * @job_step: initialization job step 3242 * 3243 * Returns: 1 if step will be retried / 0 if not 3244 * 3245 **/ 3246 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3247 void (*job_step) (struct ibmvfc_target *)) 3248 { 3249 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3250 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3251 wake_up(&tgt->vhost->work_wait_q); 3252 return 0; 3253 } else 3254 ibmvfc_init_tgt(tgt, job_step); 3255 return 1; 3256 } 3257 3258 /* Defined in FC-LS */ 3259 static const struct { 3260 int code; 3261 int retry; 3262 int logged_in; 3263 } prli_rsp [] = { 3264 { 0, 1, 0 }, 3265 { 1, 0, 1 }, 3266 { 2, 1, 0 }, 3267 { 3, 1, 0 }, 3268 { 4, 0, 0 }, 3269 { 5, 0, 0 }, 3270 { 6, 0, 1 }, 3271 { 7, 0, 0 }, 3272 { 8, 1, 0 }, 3273 }; 3274 3275 /** 3276 * ibmvfc_get_prli_rsp - Find PRLI response index 3277 * @flags: PRLI response flags 3278 * 3279 **/ 3280 static int ibmvfc_get_prli_rsp(u16 flags) 3281 { 3282 int i; 3283 int code = (flags & 0x0f00) >> 8; 3284 3285 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3286 if (prli_rsp[i].code == code) 3287 return i; 3288 3289 return 0; 3290 } 3291 3292 /** 3293 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3294 * @evt: ibmvfc event struct 3295 * 3296 **/ 3297 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3298 { 3299 struct ibmvfc_target *tgt = evt->tgt; 3300 struct ibmvfc_host *vhost = evt->vhost; 3301 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3302 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3303 u32 status = be16_to_cpu(rsp->common.status); 3304 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3305 3306 vhost->discovery_threads--; 3307 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3308 switch (status) { 3309 case IBMVFC_MAD_SUCCESS: 3310 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3311 parms->type, parms->flags, parms->service_parms); 3312 3313 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3314 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); 3315 if (prli_rsp[index].logged_in) { 3316 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { 3317 tgt->need_login = 0; 3318 tgt->ids.roles = 0; 3319 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) 3320 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3321 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) 3322 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3323 tgt->add_rport = 1; 3324 } else 3325 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3326 } else if (prli_rsp[index].retry) 3327 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3328 else 3329 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3330 } else 3331 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3332 break; 3333 case IBMVFC_MAD_DRIVER_FAILED: 3334 break; 3335 case IBMVFC_MAD_CRQ_ERROR: 3336 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3337 break; 3338 case IBMVFC_MAD_FAILED: 3339 default: 3340 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && 3341 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) 3342 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3343 else if (tgt->logo_rcvd) 3344 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3345 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3346 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3347 else 3348 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3349 3350 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3351 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3352 rsp->status, rsp->error, status); 3353 break; 3354 }; 3355 3356 kref_put(&tgt->kref, ibmvfc_release_tgt); 3357 ibmvfc_free_event(evt); 3358 wake_up(&vhost->work_wait_q); 3359 } 3360 3361 /** 3362 * ibmvfc_tgt_send_prli - Send a process login 3363 * @tgt: ibmvfc target struct 3364 * 3365 **/ 3366 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3367 { 3368 struct ibmvfc_process_login *prli; 3369 struct ibmvfc_host *vhost = tgt->vhost; 3370 struct ibmvfc_event *evt; 3371 3372 if (vhost->discovery_threads >= disc_threads) 3373 return; 3374 3375 kref_get(&tgt->kref); 3376 evt = ibmvfc_get_event(vhost); 3377 vhost->discovery_threads++; 3378 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 3379 evt->tgt = tgt; 3380 prli = &evt->iu.prli; 3381 memset(prli, 0, sizeof(*prli)); 3382 prli->common.version = cpu_to_be32(1); 3383 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); 3384 prli->common.length = cpu_to_be16(sizeof(*prli)); 3385 prli->scsi_id = cpu_to_be64(tgt->scsi_id); 3386 3387 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 3388 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); 3389 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); 3390 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED); 3391 3392 if (cls3_error) 3393 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY); 3394 3395 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3396 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3397 vhost->discovery_threads--; 3398 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3399 kref_put(&tgt->kref, ibmvfc_release_tgt); 3400 } else 3401 tgt_dbg(tgt, "Sent process login\n"); 3402 } 3403 3404 /** 3405 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 3406 * @evt: ibmvfc event struct 3407 * 3408 **/ 3409 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 3410 { 3411 struct ibmvfc_target *tgt = evt->tgt; 3412 struct ibmvfc_host *vhost = evt->vhost; 3413 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 3414 u32 status = be16_to_cpu(rsp->common.status); 3415 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3416 3417 vhost->discovery_threads--; 3418 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3419 switch (status) { 3420 case IBMVFC_MAD_SUCCESS: 3421 tgt_dbg(tgt, "Port Login succeeded\n"); 3422 if (tgt->ids.port_name && 3423 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 3424 vhost->reinit = 1; 3425 tgt_dbg(tgt, "Port re-init required\n"); 3426 break; 3427 } 3428 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3429 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3430 tgt->ids.port_id = tgt->scsi_id; 3431 memcpy(&tgt->service_parms, &rsp->service_parms, 3432 sizeof(tgt->service_parms)); 3433 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3434 sizeof(tgt->service_parms_change)); 3435 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3436 break; 3437 case IBMVFC_MAD_DRIVER_FAILED: 3438 break; 3439 case IBMVFC_MAD_CRQ_ERROR: 3440 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3441 break; 3442 case IBMVFC_MAD_FAILED: 3443 default: 3444 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3445 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3446 else 3447 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3448 3449 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3450 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), rsp->status, rsp->error, 3451 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), rsp->fc_type, 3452 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), rsp->fc_explain, status); 3453 break; 3454 }; 3455 3456 kref_put(&tgt->kref, ibmvfc_release_tgt); 3457 ibmvfc_free_event(evt); 3458 wake_up(&vhost->work_wait_q); 3459 } 3460 3461 /** 3462 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3463 * @tgt: ibmvfc target struct 3464 * 3465 **/ 3466 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3467 { 3468 struct ibmvfc_port_login *plogi; 3469 struct ibmvfc_host *vhost = tgt->vhost; 3470 struct ibmvfc_event *evt; 3471 3472 if (vhost->discovery_threads >= disc_threads) 3473 return; 3474 3475 kref_get(&tgt->kref); 3476 tgt->logo_rcvd = 0; 3477 evt = ibmvfc_get_event(vhost); 3478 vhost->discovery_threads++; 3479 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3480 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3481 evt->tgt = tgt; 3482 plogi = &evt->iu.plogi; 3483 memset(plogi, 0, sizeof(*plogi)); 3484 plogi->common.version = cpu_to_be32(1); 3485 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 3486 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 3487 plogi->scsi_id = cpu_to_be64(tgt->scsi_id); 3488 3489 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3490 vhost->discovery_threads--; 3491 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3492 kref_put(&tgt->kref, ibmvfc_release_tgt); 3493 } else 3494 tgt_dbg(tgt, "Sent port login\n"); 3495 } 3496 3497 /** 3498 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3499 * @evt: ibmvfc event struct 3500 * 3501 **/ 3502 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3503 { 3504 struct ibmvfc_target *tgt = evt->tgt; 3505 struct ibmvfc_host *vhost = evt->vhost; 3506 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3507 u32 status = be16_to_cpu(rsp->common.status); 3508 3509 vhost->discovery_threads--; 3510 ibmvfc_free_event(evt); 3511 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3512 3513 switch (status) { 3514 case IBMVFC_MAD_SUCCESS: 3515 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3516 break; 3517 case IBMVFC_MAD_DRIVER_FAILED: 3518 kref_put(&tgt->kref, ibmvfc_release_tgt); 3519 wake_up(&vhost->work_wait_q); 3520 return; 3521 case IBMVFC_MAD_FAILED: 3522 default: 3523 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3524 break; 3525 }; 3526 3527 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3528 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3529 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3530 tgt->scsi_id != tgt->new_scsi_id) 3531 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3532 kref_put(&tgt->kref, ibmvfc_release_tgt); 3533 wake_up(&vhost->work_wait_q); 3534 } 3535 3536 /** 3537 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3538 * @tgt: ibmvfc target struct 3539 * 3540 **/ 3541 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3542 { 3543 struct ibmvfc_implicit_logout *mad; 3544 struct ibmvfc_host *vhost = tgt->vhost; 3545 struct ibmvfc_event *evt; 3546 3547 if (vhost->discovery_threads >= disc_threads) 3548 return; 3549 3550 kref_get(&tgt->kref); 3551 evt = ibmvfc_get_event(vhost); 3552 vhost->discovery_threads++; 3553 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3554 evt->tgt = tgt; 3555 mad = &evt->iu.implicit_logout; 3556 memset(mad, 0, sizeof(*mad)); 3557 mad->common.version = cpu_to_be32(1); 3558 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); 3559 mad->common.length = cpu_to_be16(sizeof(*mad)); 3560 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); 3561 3562 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3563 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3564 vhost->discovery_threads--; 3565 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3566 kref_put(&tgt->kref, ibmvfc_release_tgt); 3567 } else 3568 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3569 } 3570 3571 /** 3572 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3573 * @mad: ibmvfc passthru mad struct 3574 * @tgt: ibmvfc target struct 3575 * 3576 * Returns: 3577 * 1 if PLOGI needed / 0 if PLOGI not needed 3578 **/ 3579 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3580 struct ibmvfc_target *tgt) 3581 { 3582 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3583 sizeof(tgt->ids.port_name))) 3584 return 1; 3585 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3586 sizeof(tgt->ids.node_name))) 3587 return 1; 3588 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) 3589 return 1; 3590 return 0; 3591 } 3592 3593 /** 3594 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3595 * @evt: ibmvfc event struct 3596 * 3597 **/ 3598 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3599 { 3600 struct ibmvfc_target *tgt = evt->tgt; 3601 struct ibmvfc_host *vhost = evt->vhost; 3602 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3603 u32 status = be16_to_cpu(mad->common.status); 3604 u8 fc_reason, fc_explain; 3605 3606 vhost->discovery_threads--; 3607 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3608 del_timer(&tgt->timer); 3609 3610 switch (status) { 3611 case IBMVFC_MAD_SUCCESS: 3612 tgt_dbg(tgt, "ADISC succeeded\n"); 3613 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3614 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3615 break; 3616 case IBMVFC_MAD_DRIVER_FAILED: 3617 break; 3618 case IBMVFC_MAD_FAILED: 3619 default: 3620 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3621 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; 3622 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; 3623 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3624 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), 3625 mad->iu.status, mad->iu.error, 3626 ibmvfc_get_fc_type(fc_reason), fc_reason, 3627 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3628 break; 3629 }; 3630 3631 kref_put(&tgt->kref, ibmvfc_release_tgt); 3632 ibmvfc_free_event(evt); 3633 wake_up(&vhost->work_wait_q); 3634 } 3635 3636 /** 3637 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3638 * @evt: ibmvfc event struct 3639 * 3640 **/ 3641 static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3642 { 3643 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3644 3645 memset(mad, 0, sizeof(*mad)); 3646 mad->common.version = cpu_to_be32(1); 3647 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 3648 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 3649 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3650 offsetof(struct ibmvfc_passthru_mad, iu)); 3651 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 3652 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3653 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3654 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3655 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3656 offsetof(struct ibmvfc_passthru_fc_iu, payload)); 3657 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3658 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3659 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3660 offsetof(struct ibmvfc_passthru_fc_iu, response)); 3661 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3662 } 3663 3664 /** 3665 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3666 * @evt: ibmvfc event struct 3667 * 3668 * Just cleanup this event struct. Everything else is handled by 3669 * the ADISC completion handler. If the ADISC never actually comes 3670 * back, we still have the timer running on the ADISC event struct 3671 * which will fire and cause the CRQ to get reset. 3672 * 3673 **/ 3674 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3675 { 3676 struct ibmvfc_host *vhost = evt->vhost; 3677 struct ibmvfc_target *tgt = evt->tgt; 3678 3679 tgt_dbg(tgt, "ADISC cancel complete\n"); 3680 vhost->abort_threads--; 3681 ibmvfc_free_event(evt); 3682 kref_put(&tgt->kref, ibmvfc_release_tgt); 3683 wake_up(&vhost->work_wait_q); 3684 } 3685 3686 /** 3687 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3688 * @tgt: ibmvfc target struct 3689 * 3690 * If an ADISC times out, send a cancel. If the cancel times 3691 * out, reset the CRQ. When the ADISC comes back as cancelled, 3692 * log back into the target. 3693 **/ 3694 static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) 3695 { 3696 struct ibmvfc_host *vhost = tgt->vhost; 3697 struct ibmvfc_event *evt; 3698 struct ibmvfc_tmf *tmf; 3699 unsigned long flags; 3700 int rc; 3701 3702 tgt_dbg(tgt, "ADISC timeout\n"); 3703 spin_lock_irqsave(vhost->host->host_lock, flags); 3704 if (vhost->abort_threads >= disc_threads || 3705 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3706 vhost->state != IBMVFC_INITIALIZING || 3707 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3708 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3709 return; 3710 } 3711 3712 vhost->abort_threads++; 3713 kref_get(&tgt->kref); 3714 evt = ibmvfc_get_event(vhost); 3715 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3716 3717 evt->tgt = tgt; 3718 tmf = &evt->iu.tmf; 3719 memset(tmf, 0, sizeof(*tmf)); 3720 tmf->common.version = cpu_to_be32(1); 3721 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 3722 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 3723 tmf->scsi_id = cpu_to_be64(tgt->scsi_id); 3724 tmf->cancel_key = cpu_to_be32(tgt->cancel_key); 3725 3726 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3727 3728 if (rc) { 3729 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3730 vhost->abort_threads--; 3731 kref_put(&tgt->kref, ibmvfc_release_tgt); 3732 __ibmvfc_reset_host(vhost); 3733 } else 3734 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3735 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3736 } 3737 3738 /** 3739 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3740 * @tgt: ibmvfc target struct 3741 * 3742 * When sending an ADISC we end up with two timers running. The 3743 * first timer is the timer in the ibmvfc target struct. If this 3744 * fires, we send a cancel to the target. The second timer is the 3745 * timer on the ibmvfc event for the ADISC, which is longer. If that 3746 * fires, it means the ADISC timed out and our attempt to cancel it 3747 * also failed, so we need to reset the CRQ. 3748 **/ 3749 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3750 { 3751 struct ibmvfc_passthru_mad *mad; 3752 struct ibmvfc_host *vhost = tgt->vhost; 3753 struct ibmvfc_event *evt; 3754 3755 if (vhost->discovery_threads >= disc_threads) 3756 return; 3757 3758 kref_get(&tgt->kref); 3759 evt = ibmvfc_get_event(vhost); 3760 vhost->discovery_threads++; 3761 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3762 evt->tgt = tgt; 3763 3764 ibmvfc_init_passthru(evt); 3765 mad = &evt->iu.passthru; 3766 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); 3767 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); 3768 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); 3769 3770 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); 3771 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3772 sizeof(vhost->login_buf->resp.port_name)); 3773 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3774 sizeof(vhost->login_buf->resp.node_name)); 3775 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); 3776 3777 if (timer_pending(&tgt->timer)) 3778 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3779 else { 3780 tgt->timer.data = (unsigned long) tgt; 3781 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3782 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; 3783 add_timer(&tgt->timer); 3784 } 3785 3786 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3787 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3788 vhost->discovery_threads--; 3789 del_timer(&tgt->timer); 3790 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3791 kref_put(&tgt->kref, ibmvfc_release_tgt); 3792 } else 3793 tgt_dbg(tgt, "Sent ADISC\n"); 3794 } 3795 3796 /** 3797 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3798 * @evt: ibmvfc event struct 3799 * 3800 **/ 3801 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3802 { 3803 struct ibmvfc_target *tgt = evt->tgt; 3804 struct ibmvfc_host *vhost = evt->vhost; 3805 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3806 u32 status = be16_to_cpu(rsp->common.status); 3807 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3808 3809 vhost->discovery_threads--; 3810 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3811 switch (status) { 3812 case IBMVFC_MAD_SUCCESS: 3813 tgt_dbg(tgt, "Query Target succeeded\n"); 3814 tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id); 3815 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) 3816 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3817 else 3818 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3819 break; 3820 case IBMVFC_MAD_DRIVER_FAILED: 3821 break; 3822 case IBMVFC_MAD_CRQ_ERROR: 3823 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3824 break; 3825 case IBMVFC_MAD_FAILED: 3826 default: 3827 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3828 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && 3829 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) 3830 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3831 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3832 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3833 else 3834 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3835 3836 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3837 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3838 rsp->status, rsp->error, ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), 3839 rsp->fc_type, ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), 3840 rsp->fc_explain, status); 3841 break; 3842 }; 3843 3844 kref_put(&tgt->kref, ibmvfc_release_tgt); 3845 ibmvfc_free_event(evt); 3846 wake_up(&vhost->work_wait_q); 3847 } 3848 3849 /** 3850 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3851 * @tgt: ibmvfc target struct 3852 * 3853 **/ 3854 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3855 { 3856 struct ibmvfc_query_tgt *query_tgt; 3857 struct ibmvfc_host *vhost = tgt->vhost; 3858 struct ibmvfc_event *evt; 3859 3860 if (vhost->discovery_threads >= disc_threads) 3861 return; 3862 3863 kref_get(&tgt->kref); 3864 evt = ibmvfc_get_event(vhost); 3865 vhost->discovery_threads++; 3866 evt->tgt = tgt; 3867 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3868 query_tgt = &evt->iu.query_tgt; 3869 memset(query_tgt, 0, sizeof(*query_tgt)); 3870 query_tgt->common.version = cpu_to_be32(1); 3871 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); 3872 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); 3873 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); 3874 3875 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3876 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3877 vhost->discovery_threads--; 3878 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3879 kref_put(&tgt->kref, ibmvfc_release_tgt); 3880 } else 3881 tgt_dbg(tgt, "Sent Query Target\n"); 3882 } 3883 3884 /** 3885 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3886 * @vhost: ibmvfc host struct 3887 * @scsi_id: SCSI ID to allocate target for 3888 * 3889 * Returns: 3890 * 0 on success / other on failure 3891 **/ 3892 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3893 { 3894 struct ibmvfc_target *tgt; 3895 unsigned long flags; 3896 3897 spin_lock_irqsave(vhost->host->host_lock, flags); 3898 list_for_each_entry(tgt, &vhost->targets, queue) { 3899 if (tgt->scsi_id == scsi_id) { 3900 if (tgt->need_login) 3901 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3902 goto unlock_out; 3903 } 3904 } 3905 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3906 3907 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3908 if (!tgt) { 3909 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", 3910 scsi_id); 3911 return -ENOMEM; 3912 } 3913 3914 memset(tgt, 0, sizeof(*tgt)); 3915 tgt->scsi_id = scsi_id; 3916 tgt->new_scsi_id = scsi_id; 3917 tgt->vhost = vhost; 3918 tgt->need_login = 1; 3919 tgt->cancel_key = vhost->task_set++; 3920 init_timer(&tgt->timer); 3921 kref_init(&tgt->kref); 3922 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3923 spin_lock_irqsave(vhost->host->host_lock, flags); 3924 list_add_tail(&tgt->queue, &vhost->targets); 3925 3926 unlock_out: 3927 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3928 return 0; 3929 } 3930 3931 /** 3932 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3933 * @vhost: ibmvfc host struct 3934 * 3935 * Returns: 3936 * 0 on success / other on failure 3937 **/ 3938 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3939 { 3940 int i, rc; 3941 3942 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3943 rc = ibmvfc_alloc_target(vhost, 3944 be32_to_cpu(vhost->disc_buf->scsi_id[i]) & 3945 IBMVFC_DISC_TGT_SCSI_ID_MASK); 3946 3947 return rc; 3948 } 3949 3950 /** 3951 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3952 * @evt: ibmvfc event struct 3953 * 3954 **/ 3955 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3956 { 3957 struct ibmvfc_host *vhost = evt->vhost; 3958 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3959 u32 mad_status = be16_to_cpu(rsp->common.status); 3960 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3961 3962 switch (mad_status) { 3963 case IBMVFC_MAD_SUCCESS: 3964 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3965 vhost->num_targets = be32_to_cpu(rsp->num_written); 3966 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3967 break; 3968 case IBMVFC_MAD_FAILED: 3969 level += ibmvfc_retry_host_init(vhost); 3970 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 3971 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3972 rsp->status, rsp->error); 3973 break; 3974 case IBMVFC_MAD_DRIVER_FAILED: 3975 break; 3976 default: 3977 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3978 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3979 break; 3980 } 3981 3982 ibmvfc_free_event(evt); 3983 wake_up(&vhost->work_wait_q); 3984 } 3985 3986 /** 3987 * ibmvfc_discover_targets - Send Discover Targets MAD 3988 * @vhost: ibmvfc host struct 3989 * 3990 **/ 3991 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3992 { 3993 struct ibmvfc_discover_targets *mad; 3994 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3995 3996 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3997 mad = &evt->iu.discover_targets; 3998 memset(mad, 0, sizeof(*mad)); 3999 mad->common.version = cpu_to_be32(1); 4000 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); 4001 mad->common.length = cpu_to_be16(sizeof(*mad)); 4002 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz); 4003 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma); 4004 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz); 4005 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4006 4007 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4008 ibmvfc_dbg(vhost, "Sent discover targets\n"); 4009 else 4010 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4011 } 4012 4013 /** 4014 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 4015 * @evt: ibmvfc event struct 4016 * 4017 **/ 4018 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 4019 { 4020 struct ibmvfc_host *vhost = evt->vhost; 4021 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); 4022 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 4023 unsigned int npiv_max_sectors; 4024 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4025 4026 switch (mad_status) { 4027 case IBMVFC_MAD_SUCCESS: 4028 ibmvfc_free_event(evt); 4029 break; 4030 case IBMVFC_MAD_FAILED: 4031 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4032 level += ibmvfc_retry_host_init(vhost); 4033 else 4034 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4035 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 4036 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4037 rsp->status, rsp->error); 4038 ibmvfc_free_event(evt); 4039 return; 4040 case IBMVFC_MAD_CRQ_ERROR: 4041 ibmvfc_retry_host_init(vhost); 4042 case IBMVFC_MAD_DRIVER_FAILED: 4043 ibmvfc_free_event(evt); 4044 return; 4045 default: 4046 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 4047 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4048 ibmvfc_free_event(evt); 4049 return; 4050 } 4051 4052 vhost->client_migrated = 0; 4053 4054 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { 4055 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 4056 rsp->flags); 4057 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4058 wake_up(&vhost->work_wait_q); 4059 return; 4060 } 4061 4062 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { 4063 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 4064 rsp->max_cmds); 4065 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4066 wake_up(&vhost->work_wait_q); 4067 return; 4068 } 4069 4070 vhost->logged_in = 1; 4071 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); 4072 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 4073 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 4074 rsp->drc_name, npiv_max_sectors); 4075 4076 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); 4077 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); 4078 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); 4079 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); 4080 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 4081 fc_host_supported_classes(vhost->host) = 0; 4082 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) 4083 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 4084 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) 4085 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 4086 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) 4087 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 4088 fc_host_maxframe_size(vhost->host) = 4089 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; 4090 4091 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; 4092 vhost->host->max_sectors = npiv_max_sectors; 4093 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4094 wake_up(&vhost->work_wait_q); 4095 } 4096 4097 /** 4098 * ibmvfc_npiv_login - Sends NPIV login 4099 * @vhost: ibmvfc host struct 4100 * 4101 **/ 4102 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 4103 { 4104 struct ibmvfc_npiv_login_mad *mad; 4105 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4106 4107 ibmvfc_gather_partition_info(vhost); 4108 ibmvfc_set_login_info(vhost); 4109 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 4110 4111 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 4112 mad = &evt->iu.npiv_login; 4113 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 4114 mad->common.version = cpu_to_be32(1); 4115 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); 4116 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); 4117 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); 4118 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); 4119 4120 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4121 4122 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4123 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 4124 else 4125 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4126 }; 4127 4128 /** 4129 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 4130 * @vhost: ibmvfc host struct 4131 * 4132 **/ 4133 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 4134 { 4135 struct ibmvfc_host *vhost = evt->vhost; 4136 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); 4137 4138 ibmvfc_free_event(evt); 4139 4140 switch (mad_status) { 4141 case IBMVFC_MAD_SUCCESS: 4142 if (list_empty(&vhost->sent) && 4143 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 4144 ibmvfc_init_host(vhost); 4145 return; 4146 } 4147 break; 4148 case IBMVFC_MAD_FAILED: 4149 case IBMVFC_MAD_NOT_SUPPORTED: 4150 case IBMVFC_MAD_CRQ_ERROR: 4151 case IBMVFC_MAD_DRIVER_FAILED: 4152 default: 4153 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 4154 break; 4155 } 4156 4157 ibmvfc_hard_reset_host(vhost); 4158 } 4159 4160 /** 4161 * ibmvfc_npiv_logout - Issue an NPIV Logout 4162 * @vhost: ibmvfc host struct 4163 * 4164 **/ 4165 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 4166 { 4167 struct ibmvfc_npiv_logout_mad *mad; 4168 struct ibmvfc_event *evt; 4169 4170 evt = ibmvfc_get_event(vhost); 4171 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 4172 4173 mad = &evt->iu.npiv_logout; 4174 memset(mad, 0, sizeof(*mad)); 4175 mad->common.version = cpu_to_be32(1); 4176 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); 4177 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); 4178 4179 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 4180 4181 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4182 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 4183 else 4184 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4185 } 4186 4187 /** 4188 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 4189 * @vhost: ibmvfc host struct 4190 * 4191 * Returns: 4192 * 1 if work to do / 0 if not 4193 **/ 4194 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 4195 { 4196 struct ibmvfc_target *tgt; 4197 4198 list_for_each_entry(tgt, &vhost->targets, queue) { 4199 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 4200 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4201 return 1; 4202 } 4203 4204 return 0; 4205 } 4206 4207 /** 4208 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 4209 * @vhost: ibmvfc host struct 4210 * 4211 * Returns: 4212 * 1 if work to do / 0 if not 4213 **/ 4214 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4215 { 4216 struct ibmvfc_target *tgt; 4217 4218 if (kthread_should_stop()) 4219 return 1; 4220 switch (vhost->action) { 4221 case IBMVFC_HOST_ACTION_NONE: 4222 case IBMVFC_HOST_ACTION_INIT_WAIT: 4223 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4224 return 0; 4225 case IBMVFC_HOST_ACTION_TGT_INIT: 4226 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4227 if (vhost->discovery_threads == disc_threads) 4228 return 0; 4229 list_for_each_entry(tgt, &vhost->targets, queue) 4230 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 4231 return 1; 4232 list_for_each_entry(tgt, &vhost->targets, queue) 4233 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4234 return 0; 4235 return 1; 4236 case IBMVFC_HOST_ACTION_LOGO: 4237 case IBMVFC_HOST_ACTION_INIT: 4238 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4239 case IBMVFC_HOST_ACTION_TGT_DEL: 4240 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4241 case IBMVFC_HOST_ACTION_QUERY: 4242 case IBMVFC_HOST_ACTION_RESET: 4243 case IBMVFC_HOST_ACTION_REENABLE: 4244 default: 4245 break; 4246 }; 4247 4248 return 1; 4249 } 4250 4251 /** 4252 * ibmvfc_work_to_do - Is there task level work to do? 4253 * @vhost: ibmvfc host struct 4254 * 4255 * Returns: 4256 * 1 if work to do / 0 if not 4257 **/ 4258 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4259 { 4260 unsigned long flags; 4261 int rc; 4262 4263 spin_lock_irqsave(vhost->host->host_lock, flags); 4264 rc = __ibmvfc_work_to_do(vhost); 4265 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4266 return rc; 4267 } 4268 4269 /** 4270 * ibmvfc_log_ae - Log async events if necessary 4271 * @vhost: ibmvfc host struct 4272 * @events: events to log 4273 * 4274 **/ 4275 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 4276 { 4277 if (events & IBMVFC_AE_RSCN) 4278 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 4279 if ((events & IBMVFC_AE_LINKDOWN) && 4280 vhost->state >= IBMVFC_HALTED) 4281 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 4282 if ((events & IBMVFC_AE_LINKUP) && 4283 vhost->state == IBMVFC_INITIALIZING) 4284 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 4285 } 4286 4287 /** 4288 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 4289 * @tgt: ibmvfc target struct 4290 * 4291 **/ 4292 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 4293 { 4294 struct ibmvfc_host *vhost = tgt->vhost; 4295 struct fc_rport *rport; 4296 unsigned long flags; 4297 4298 tgt_dbg(tgt, "Adding rport\n"); 4299 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 4300 spin_lock_irqsave(vhost->host->host_lock, flags); 4301 4302 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4303 tgt_dbg(tgt, "Deleting rport\n"); 4304 list_del(&tgt->queue); 4305 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4306 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4307 fc_remote_port_delete(rport); 4308 del_timer_sync(&tgt->timer); 4309 kref_put(&tgt->kref, ibmvfc_release_tgt); 4310 return; 4311 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 4312 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4313 return; 4314 } 4315 4316 if (rport) { 4317 tgt_dbg(tgt, "rport add succeeded\n"); 4318 tgt->rport = rport; 4319 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; 4320 rport->supported_classes = 0; 4321 tgt->target_id = rport->scsi_target_id; 4322 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) 4323 rport->supported_classes |= FC_COS_CLASS1; 4324 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) 4325 rport->supported_classes |= FC_COS_CLASS2; 4326 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) 4327 rport->supported_classes |= FC_COS_CLASS3; 4328 if (rport->rqst_q) 4329 blk_queue_max_segments(rport->rqst_q, 1); 4330 } else 4331 tgt_dbg(tgt, "rport add failed\n"); 4332 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4333 } 4334 4335 /** 4336 * ibmvfc_do_work - Do task level work 4337 * @vhost: ibmvfc host struct 4338 * 4339 **/ 4340 static void ibmvfc_do_work(struct ibmvfc_host *vhost) 4341 { 4342 struct ibmvfc_target *tgt; 4343 unsigned long flags; 4344 struct fc_rport *rport; 4345 int rc; 4346 4347 ibmvfc_log_ae(vhost, vhost->events_to_log); 4348 spin_lock_irqsave(vhost->host->host_lock, flags); 4349 vhost->events_to_log = 0; 4350 switch (vhost->action) { 4351 case IBMVFC_HOST_ACTION_NONE: 4352 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4353 case IBMVFC_HOST_ACTION_INIT_WAIT: 4354 break; 4355 case IBMVFC_HOST_ACTION_RESET: 4356 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4357 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4358 rc = ibmvfc_reset_crq(vhost); 4359 spin_lock_irqsave(vhost->host->host_lock, flags); 4360 if (rc == H_CLOSED) 4361 vio_enable_interrupts(to_vio_dev(vhost->dev)); 4362 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 4363 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 4364 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4365 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 4366 } 4367 break; 4368 case IBMVFC_HOST_ACTION_REENABLE: 4369 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4370 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4371 rc = ibmvfc_reenable_crq_queue(vhost); 4372 spin_lock_irqsave(vhost->host->host_lock, flags); 4373 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 4374 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4375 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 4376 } 4377 break; 4378 case IBMVFC_HOST_ACTION_LOGO: 4379 vhost->job_step(vhost); 4380 break; 4381 case IBMVFC_HOST_ACTION_INIT: 4382 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 4383 if (vhost->delay_init) { 4384 vhost->delay_init = 0; 4385 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4386 ssleep(15); 4387 return; 4388 } else 4389 vhost->job_step(vhost); 4390 break; 4391 case IBMVFC_HOST_ACTION_QUERY: 4392 list_for_each_entry(tgt, &vhost->targets, queue) 4393 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 4394 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 4395 break; 4396 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4397 list_for_each_entry(tgt, &vhost->targets, queue) { 4398 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4399 tgt->job_step(tgt); 4400 break; 4401 } 4402 } 4403 4404 if (!ibmvfc_dev_init_to_do(vhost)) 4405 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 4406 break; 4407 case IBMVFC_HOST_ACTION_TGT_DEL: 4408 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4409 list_for_each_entry(tgt, &vhost->targets, queue) { 4410 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4411 tgt_dbg(tgt, "Deleting rport\n"); 4412 rport = tgt->rport; 4413 tgt->rport = NULL; 4414 list_del(&tgt->queue); 4415 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4416 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4417 if (rport) 4418 fc_remote_port_delete(rport); 4419 del_timer_sync(&tgt->timer); 4420 kref_put(&tgt->kref, ibmvfc_release_tgt); 4421 return; 4422 } 4423 } 4424 4425 if (vhost->state == IBMVFC_INITIALIZING) { 4426 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 4427 if (vhost->reinit) { 4428 vhost->reinit = 0; 4429 scsi_block_requests(vhost->host); 4430 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4431 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4432 } else { 4433 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 4434 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4435 wake_up(&vhost->init_wait_q); 4436 schedule_work(&vhost->rport_add_work_q); 4437 vhost->init_retries = 0; 4438 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4439 scsi_unblock_requests(vhost->host); 4440 } 4441 4442 return; 4443 } else { 4444 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 4445 vhost->job_step = ibmvfc_discover_targets; 4446 } 4447 } else { 4448 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4449 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4450 scsi_unblock_requests(vhost->host); 4451 wake_up(&vhost->init_wait_q); 4452 return; 4453 } 4454 break; 4455 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4456 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4457 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4458 ibmvfc_alloc_targets(vhost); 4459 spin_lock_irqsave(vhost->host->host_lock, flags); 4460 break; 4461 case IBMVFC_HOST_ACTION_TGT_INIT: 4462 list_for_each_entry(tgt, &vhost->targets, queue) { 4463 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4464 tgt->job_step(tgt); 4465 break; 4466 } 4467 } 4468 4469 if (!ibmvfc_dev_init_to_do(vhost)) 4470 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4471 break; 4472 default: 4473 break; 4474 }; 4475 4476 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4477 } 4478 4479 /** 4480 * ibmvfc_work - Do task level work 4481 * @data: ibmvfc host struct 4482 * 4483 * Returns: 4484 * zero 4485 **/ 4486 static int ibmvfc_work(void *data) 4487 { 4488 struct ibmvfc_host *vhost = data; 4489 int rc; 4490 4491 set_user_nice(current, MIN_NICE); 4492 4493 while (1) { 4494 rc = wait_event_interruptible(vhost->work_wait_q, 4495 ibmvfc_work_to_do(vhost)); 4496 4497 BUG_ON(rc); 4498 4499 if (kthread_should_stop()) 4500 break; 4501 4502 ibmvfc_do_work(vhost); 4503 } 4504 4505 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4506 return 0; 4507 } 4508 4509 /** 4510 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4511 * @vhost: ibmvfc host struct 4512 * 4513 * Allocates a page for messages, maps it for dma, and registers 4514 * the crq with the hypervisor. 4515 * 4516 * Return value: 4517 * zero on success / other on failure 4518 **/ 4519 static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4520 { 4521 int rc, retrc = -ENOMEM; 4522 struct device *dev = vhost->dev; 4523 struct vio_dev *vdev = to_vio_dev(dev); 4524 struct ibmvfc_crq_queue *crq = &vhost->crq; 4525 4526 ENTER; 4527 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4528 4529 if (!crq->msgs) 4530 return -ENOMEM; 4531 4532 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4533 crq->msg_token = dma_map_single(dev, crq->msgs, 4534 PAGE_SIZE, DMA_BIDIRECTIONAL); 4535 4536 if (dma_mapping_error(dev, crq->msg_token)) 4537 goto map_failed; 4538 4539 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4540 crq->msg_token, PAGE_SIZE); 4541 4542 if (rc == H_RESOURCE) 4543 /* maybe kexecing and resource is busy. try a reset */ 4544 retrc = rc = ibmvfc_reset_crq(vhost); 4545 4546 if (rc == H_CLOSED) 4547 dev_warn(dev, "Partner adapter not ready\n"); 4548 else if (rc) { 4549 dev_warn(dev, "Error %d opening adapter\n", rc); 4550 goto reg_crq_failed; 4551 } 4552 4553 retrc = 0; 4554 4555 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4556 4557 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4558 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4559 goto req_irq_failed; 4560 } 4561 4562 if ((rc = vio_enable_interrupts(vdev))) { 4563 dev_err(dev, "Error %d enabling interrupts\n", rc); 4564 goto req_irq_failed; 4565 } 4566 4567 crq->cur = 0; 4568 LEAVE; 4569 return retrc; 4570 4571 req_irq_failed: 4572 tasklet_kill(&vhost->tasklet); 4573 do { 4574 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4575 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4576 reg_crq_failed: 4577 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4578 map_failed: 4579 free_page((unsigned long)crq->msgs); 4580 return retrc; 4581 } 4582 4583 /** 4584 * ibmvfc_free_mem - Free memory for vhost 4585 * @vhost: ibmvfc host struct 4586 * 4587 * Return value: 4588 * none 4589 **/ 4590 static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4591 { 4592 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4593 4594 ENTER; 4595 mempool_destroy(vhost->tgt_pool); 4596 kfree(vhost->trace); 4597 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4598 vhost->disc_buf_dma); 4599 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4600 vhost->login_buf, vhost->login_buf_dma); 4601 dma_pool_destroy(vhost->sg_pool); 4602 dma_unmap_single(vhost->dev, async_q->msg_token, 4603 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4604 free_page((unsigned long)async_q->msgs); 4605 LEAVE; 4606 } 4607 4608 /** 4609 * ibmvfc_alloc_mem - Allocate memory for vhost 4610 * @vhost: ibmvfc host struct 4611 * 4612 * Return value: 4613 * 0 on success / non-zero on failure 4614 **/ 4615 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4616 { 4617 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4618 struct device *dev = vhost->dev; 4619 4620 ENTER; 4621 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4622 if (!async_q->msgs) { 4623 dev_err(dev, "Couldn't allocate async queue.\n"); 4624 goto nomem; 4625 } 4626 4627 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4628 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4629 async_q->size * sizeof(*async_q->msgs), 4630 DMA_BIDIRECTIONAL); 4631 4632 if (dma_mapping_error(dev, async_q->msg_token)) { 4633 dev_err(dev, "Failed to map async queue\n"); 4634 goto free_async_crq; 4635 } 4636 4637 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4638 SG_ALL * sizeof(struct srp_direct_buf), 4639 sizeof(struct srp_direct_buf), 0); 4640 4641 if (!vhost->sg_pool) { 4642 dev_err(dev, "Failed to allocate sg pool\n"); 4643 goto unmap_async_crq; 4644 } 4645 4646 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4647 &vhost->login_buf_dma, GFP_KERNEL); 4648 4649 if (!vhost->login_buf) { 4650 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4651 goto free_sg_pool; 4652 } 4653 4654 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4655 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4656 &vhost->disc_buf_dma, GFP_KERNEL); 4657 4658 if (!vhost->disc_buf) { 4659 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4660 goto free_login_buffer; 4661 } 4662 4663 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4664 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4665 4666 if (!vhost->trace) 4667 goto free_disc_buffer; 4668 4669 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4670 sizeof(struct ibmvfc_target)); 4671 4672 if (!vhost->tgt_pool) { 4673 dev_err(dev, "Couldn't allocate target memory pool\n"); 4674 goto free_trace; 4675 } 4676 4677 LEAVE; 4678 return 0; 4679 4680 free_trace: 4681 kfree(vhost->trace); 4682 free_disc_buffer: 4683 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4684 vhost->disc_buf_dma); 4685 free_login_buffer: 4686 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4687 vhost->login_buf, vhost->login_buf_dma); 4688 free_sg_pool: 4689 dma_pool_destroy(vhost->sg_pool); 4690 unmap_async_crq: 4691 dma_unmap_single(dev, async_q->msg_token, 4692 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4693 free_async_crq: 4694 free_page((unsigned long)async_q->msgs); 4695 nomem: 4696 LEAVE; 4697 return -ENOMEM; 4698 } 4699 4700 /** 4701 * ibmvfc_rport_add_thread - Worker thread for rport adds 4702 * @work: work struct 4703 * 4704 **/ 4705 static void ibmvfc_rport_add_thread(struct work_struct *work) 4706 { 4707 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4708 rport_add_work_q); 4709 struct ibmvfc_target *tgt; 4710 struct fc_rport *rport; 4711 unsigned long flags; 4712 int did_work; 4713 4714 ENTER; 4715 spin_lock_irqsave(vhost->host->host_lock, flags); 4716 do { 4717 did_work = 0; 4718 if (vhost->state != IBMVFC_ACTIVE) 4719 break; 4720 4721 list_for_each_entry(tgt, &vhost->targets, queue) { 4722 if (tgt->add_rport) { 4723 did_work = 1; 4724 tgt->add_rport = 0; 4725 kref_get(&tgt->kref); 4726 rport = tgt->rport; 4727 if (!rport) { 4728 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4729 ibmvfc_tgt_add_rport(tgt); 4730 } else if (get_device(&rport->dev)) { 4731 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4732 tgt_dbg(tgt, "Setting rport roles\n"); 4733 fc_remote_port_rolechg(rport, tgt->ids.roles); 4734 put_device(&rport->dev); 4735 } else { 4736 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4737 } 4738 4739 kref_put(&tgt->kref, ibmvfc_release_tgt); 4740 spin_lock_irqsave(vhost->host->host_lock, flags); 4741 break; 4742 } 4743 } 4744 } while(did_work); 4745 4746 if (vhost->state == IBMVFC_ACTIVE) 4747 vhost->scan_complete = 1; 4748 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4749 LEAVE; 4750 } 4751 4752 /** 4753 * ibmvfc_probe - Adapter hot plug add entry point 4754 * @vdev: vio device struct 4755 * @id: vio device id struct 4756 * 4757 * Return value: 4758 * 0 on success / non-zero on failure 4759 **/ 4760 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4761 { 4762 struct ibmvfc_host *vhost; 4763 struct Scsi_Host *shost; 4764 struct device *dev = &vdev->dev; 4765 int rc = -ENOMEM; 4766 4767 ENTER; 4768 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4769 if (!shost) { 4770 dev_err(dev, "Couldn't allocate host data\n"); 4771 goto out; 4772 } 4773 4774 shost->transportt = ibmvfc_transport_template; 4775 shost->can_queue = max_requests; 4776 shost->max_lun = max_lun; 4777 shost->max_id = max_targets; 4778 shost->max_sectors = IBMVFC_MAX_SECTORS; 4779 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4780 shost->unique_id = shost->host_no; 4781 4782 vhost = shost_priv(shost); 4783 INIT_LIST_HEAD(&vhost->sent); 4784 INIT_LIST_HEAD(&vhost->free); 4785 INIT_LIST_HEAD(&vhost->targets); 4786 sprintf(vhost->name, IBMVFC_NAME); 4787 vhost->host = shost; 4788 vhost->dev = dev; 4789 vhost->partition_number = -1; 4790 vhost->log_level = log_level; 4791 vhost->task_set = 1; 4792 strcpy(vhost->partition_name, "UNKNOWN"); 4793 init_waitqueue_head(&vhost->work_wait_q); 4794 init_waitqueue_head(&vhost->init_wait_q); 4795 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4796 mutex_init(&vhost->passthru_mutex); 4797 4798 if ((rc = ibmvfc_alloc_mem(vhost))) 4799 goto free_scsi_host; 4800 4801 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4802 shost->host_no); 4803 4804 if (IS_ERR(vhost->work_thread)) { 4805 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4806 PTR_ERR(vhost->work_thread)); 4807 goto free_host_mem; 4808 } 4809 4810 if ((rc = ibmvfc_init_crq(vhost))) { 4811 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4812 goto kill_kthread; 4813 } 4814 4815 if ((rc = ibmvfc_init_event_pool(vhost))) { 4816 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4817 goto release_crq; 4818 } 4819 4820 if ((rc = scsi_add_host(shost, dev))) 4821 goto release_event_pool; 4822 4823 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 4824 4825 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4826 &ibmvfc_trace_attr))) { 4827 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4828 goto remove_shost; 4829 } 4830 4831 if (shost_to_fc_host(shost)->rqst_q) 4832 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 4833 dev_set_drvdata(dev, vhost); 4834 spin_lock(&ibmvfc_driver_lock); 4835 list_add_tail(&vhost->queue, &ibmvfc_head); 4836 spin_unlock(&ibmvfc_driver_lock); 4837 4838 ibmvfc_send_crq_init(vhost); 4839 scsi_scan_host(shost); 4840 return 0; 4841 4842 remove_shost: 4843 scsi_remove_host(shost); 4844 release_event_pool: 4845 ibmvfc_free_event_pool(vhost); 4846 release_crq: 4847 ibmvfc_release_crq_queue(vhost); 4848 kill_kthread: 4849 kthread_stop(vhost->work_thread); 4850 free_host_mem: 4851 ibmvfc_free_mem(vhost); 4852 free_scsi_host: 4853 scsi_host_put(shost); 4854 out: 4855 LEAVE; 4856 return rc; 4857 } 4858 4859 /** 4860 * ibmvfc_remove - Adapter hot plug remove entry point 4861 * @vdev: vio device struct 4862 * 4863 * Return value: 4864 * 0 4865 **/ 4866 static int ibmvfc_remove(struct vio_dev *vdev) 4867 { 4868 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4869 unsigned long flags; 4870 4871 ENTER; 4872 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4873 4874 spin_lock_irqsave(vhost->host->host_lock, flags); 4875 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4876 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4877 4878 ibmvfc_wait_while_resetting(vhost); 4879 ibmvfc_release_crq_queue(vhost); 4880 kthread_stop(vhost->work_thread); 4881 fc_remove_host(vhost->host); 4882 scsi_remove_host(vhost->host); 4883 4884 spin_lock_irqsave(vhost->host->host_lock, flags); 4885 ibmvfc_purge_requests(vhost, DID_ERROR); 4886 ibmvfc_free_event_pool(vhost); 4887 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4888 4889 ibmvfc_free_mem(vhost); 4890 spin_lock(&ibmvfc_driver_lock); 4891 list_del(&vhost->queue); 4892 spin_unlock(&ibmvfc_driver_lock); 4893 scsi_host_put(vhost->host); 4894 LEAVE; 4895 return 0; 4896 } 4897 4898 /** 4899 * ibmvfc_resume - Resume from suspend 4900 * @dev: device struct 4901 * 4902 * We may have lost an interrupt across suspend/resume, so kick the 4903 * interrupt handler 4904 * 4905 */ 4906 static int ibmvfc_resume(struct device *dev) 4907 { 4908 unsigned long flags; 4909 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 4910 struct vio_dev *vdev = to_vio_dev(dev); 4911 4912 spin_lock_irqsave(vhost->host->host_lock, flags); 4913 vio_disable_interrupts(vdev); 4914 tasklet_schedule(&vhost->tasklet); 4915 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4916 return 0; 4917 } 4918 4919 /** 4920 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4921 * @vdev: vio device struct 4922 * 4923 * Return value: 4924 * Number of bytes the driver will need to DMA map at the same time in 4925 * order to perform well. 4926 */ 4927 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4928 { 4929 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4930 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4931 } 4932 4933 static struct vio_device_id ibmvfc_device_table[] = { 4934 {"fcp", "IBM,vfc-client"}, 4935 { "", "" } 4936 }; 4937 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4938 4939 static struct dev_pm_ops ibmvfc_pm_ops = { 4940 .resume = ibmvfc_resume 4941 }; 4942 4943 static struct vio_driver ibmvfc_driver = { 4944 .id_table = ibmvfc_device_table, 4945 .probe = ibmvfc_probe, 4946 .remove = ibmvfc_remove, 4947 .get_desired_dma = ibmvfc_get_desired_dma, 4948 .name = IBMVFC_NAME, 4949 .pm = &ibmvfc_pm_ops, 4950 }; 4951 4952 static struct fc_function_template ibmvfc_transport_functions = { 4953 .show_host_fabric_name = 1, 4954 .show_host_node_name = 1, 4955 .show_host_port_name = 1, 4956 .show_host_supported_classes = 1, 4957 .show_host_port_type = 1, 4958 .show_host_port_id = 1, 4959 .show_host_maxframe_size = 1, 4960 4961 .get_host_port_state = ibmvfc_get_host_port_state, 4962 .show_host_port_state = 1, 4963 4964 .get_host_speed = ibmvfc_get_host_speed, 4965 .show_host_speed = 1, 4966 4967 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4968 .terminate_rport_io = ibmvfc_terminate_rport_io, 4969 4970 .show_rport_maxframe_size = 1, 4971 .show_rport_supported_classes = 1, 4972 4973 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4974 .show_rport_dev_loss_tmo = 1, 4975 4976 .get_starget_node_name = ibmvfc_get_starget_node_name, 4977 .show_starget_node_name = 1, 4978 4979 .get_starget_port_name = ibmvfc_get_starget_port_name, 4980 .show_starget_port_name = 1, 4981 4982 .get_starget_port_id = ibmvfc_get_starget_port_id, 4983 .show_starget_port_id = 1, 4984 4985 .bsg_request = ibmvfc_bsg_request, 4986 .bsg_timeout = ibmvfc_bsg_timeout, 4987 }; 4988 4989 /** 4990 * ibmvfc_module_init - Initialize the ibmvfc module 4991 * 4992 * Return value: 4993 * 0 on success / other on failure 4994 **/ 4995 static int __init ibmvfc_module_init(void) 4996 { 4997 int rc; 4998 4999 if (!firmware_has_feature(FW_FEATURE_VIO)) 5000 return -ENODEV; 5001 5002 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 5003 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 5004 5005 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 5006 if (!ibmvfc_transport_template) 5007 return -ENOMEM; 5008 5009 rc = vio_register_driver(&ibmvfc_driver); 5010 if (rc) 5011 fc_release_transport(ibmvfc_transport_template); 5012 return rc; 5013 } 5014 5015 /** 5016 * ibmvfc_module_exit - Teardown the ibmvfc module 5017 * 5018 * Return value: 5019 * nothing 5020 **/ 5021 static void __exit ibmvfc_module_exit(void) 5022 { 5023 vio_unregister_driver(&ibmvfc_driver); 5024 fc_release_transport(ibmvfc_transport_template); 5025 } 5026 5027 module_init(ibmvfc_module_init); 5028 module_exit(ibmvfc_module_exit); 5029