1 /* 2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 3 * 4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 5 * 6 * Copyright (C) IBM Corporation, 2008 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24 #include <linux/module.h> 25 #include <linux/moduleparam.h> 26 #include <linux/dma-mapping.h> 27 #include <linux/dmapool.h> 28 #include <linux/delay.h> 29 #include <linux/interrupt.h> 30 #include <linux/kthread.h> 31 #include <linux/slab.h> 32 #include <linux/of.h> 33 #include <linux/pm.h> 34 #include <linux/stringify.h> 35 #include <linux/bsg-lib.h> 36 #include <asm/firmware.h> 37 #include <asm/irq.h> 38 #include <asm/vio.h> 39 #include <scsi/scsi.h> 40 #include <scsi/scsi_cmnd.h> 41 #include <scsi/scsi_host.h> 42 #include <scsi/scsi_device.h> 43 #include <scsi/scsi_tcq.h> 44 #include <scsi/scsi_transport_fc.h> 45 #include <scsi/scsi_bsg_fc.h> 46 #include "ibmvfc.h" 47 48 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 49 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 50 static u64 max_lun = IBMVFC_MAX_LUN; 51 static unsigned int max_targets = IBMVFC_MAX_TARGETS; 52 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 53 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 54 static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 55 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 56 static unsigned int cls3_error = IBMVFC_CLS3_ERROR; 57 static LIST_HEAD(ibmvfc_head); 58 static DEFINE_SPINLOCK(ibmvfc_driver_lock); 59 static struct scsi_transport_template *ibmvfc_transport_template; 60 61 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 62 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 63 MODULE_LICENSE("GPL"); 64 MODULE_VERSION(IBMVFC_DRIVER_VERSION); 65 66 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 67 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 68 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 69 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 70 MODULE_PARM_DESC(default_timeout, 71 "Default timeout in seconds for initialization and EH commands. " 72 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 73 module_param_named(max_requests, max_requests, uint, S_IRUGO); 74 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 75 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 76 module_param_named(max_lun, max_lun, ullong, S_IRUGO); 77 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 78 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 79 module_param_named(max_targets, max_targets, uint, S_IRUGO); 80 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 81 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 82 module_param_named(disc_threads, disc_threads, uint, S_IRUGO); 83 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 84 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 85 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 86 MODULE_PARM_DESC(debug, "Enable driver debug information. " 87 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 88 module_param_named(log_level, log_level, uint, 0); 89 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 90 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 91 module_param_named(cls3_error, cls3_error, uint, 0); 92 MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. " 93 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]"); 94 95 static const struct { 96 u16 status; 97 u16 error; 98 u8 result; 99 u8 retry; 100 int log; 101 char *name; 102 } cmd_status [] = { 103 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 104 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 105 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 106 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 107 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 108 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 109 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 110 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 111 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 112 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 115 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 116 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 117 118 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 119 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 120 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 121 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 122 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 123 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 124 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 125 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 126 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 127 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 128 129 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 131 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 132 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 133 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 134 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 135 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 136 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 137 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 138 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 139 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 140 141 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 142 }; 143 144 static void ibmvfc_npiv_login(struct ibmvfc_host *); 145 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 146 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 147 static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 148 static void ibmvfc_npiv_logout(struct ibmvfc_host *); 149 150 static const char *unknown_error = "unknown error"; 151 152 #ifdef CONFIG_SCSI_IBMVFC_TRACE 153 /** 154 * ibmvfc_trc_start - Log a start trace entry 155 * @evt: ibmvfc event struct 156 * 157 **/ 158 static void ibmvfc_trc_start(struct ibmvfc_event *evt) 159 { 160 struct ibmvfc_host *vhost = evt->vhost; 161 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 162 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 163 struct ibmvfc_trace_entry *entry; 164 165 entry = &vhost->trace[vhost->trace_index++]; 166 entry->evt = evt; 167 entry->time = jiffies; 168 entry->fmt = evt->crq.format; 169 entry->type = IBMVFC_TRC_START; 170 171 switch (entry->fmt) { 172 case IBMVFC_CMD_FORMAT: 173 entry->op_code = vfc_cmd->iu.cdb[0]; 174 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 175 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 176 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 177 entry->u.start.xfer_len = be32_to_cpu(vfc_cmd->iu.xfer_len); 178 break; 179 case IBMVFC_MAD_FORMAT: 180 entry->op_code = be32_to_cpu(mad->opcode); 181 break; 182 default: 183 break; 184 }; 185 } 186 187 /** 188 * ibmvfc_trc_end - Log an end trace entry 189 * @evt: ibmvfc event struct 190 * 191 **/ 192 static void ibmvfc_trc_end(struct ibmvfc_event *evt) 193 { 194 struct ibmvfc_host *vhost = evt->vhost; 195 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 196 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 197 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; 198 199 entry->evt = evt; 200 entry->time = jiffies; 201 entry->fmt = evt->crq.format; 202 entry->type = IBMVFC_TRC_END; 203 204 switch (entry->fmt) { 205 case IBMVFC_CMD_FORMAT: 206 entry->op_code = vfc_cmd->iu.cdb[0]; 207 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 208 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 209 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 210 entry->u.end.status = be16_to_cpu(vfc_cmd->status); 211 entry->u.end.error = be16_to_cpu(vfc_cmd->error); 212 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; 213 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; 214 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; 215 break; 216 case IBMVFC_MAD_FORMAT: 217 entry->op_code = be32_to_cpu(mad->opcode); 218 entry->u.end.status = be16_to_cpu(mad->status); 219 break; 220 default: 221 break; 222 223 }; 224 } 225 226 #else 227 #define ibmvfc_trc_start(evt) do { } while (0) 228 #define ibmvfc_trc_end(evt) do { } while (0) 229 #endif 230 231 /** 232 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 233 * @status: status / error class 234 * @error: error 235 * 236 * Return value: 237 * index into cmd_status / -EINVAL on failure 238 **/ 239 static int ibmvfc_get_err_index(u16 status, u16 error) 240 { 241 int i; 242 243 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 244 if ((cmd_status[i].status & status) == cmd_status[i].status && 245 cmd_status[i].error == error) 246 return i; 247 248 return -EINVAL; 249 } 250 251 /** 252 * ibmvfc_get_cmd_error - Find the error description for the fcp response 253 * @status: status / error class 254 * @error: error 255 * 256 * Return value: 257 * error description string 258 **/ 259 static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 260 { 261 int rc = ibmvfc_get_err_index(status, error); 262 if (rc >= 0) 263 return cmd_status[rc].name; 264 return unknown_error; 265 } 266 267 /** 268 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 269 * @vfc_cmd: ibmvfc command struct 270 * 271 * Return value: 272 * SCSI result value to return for completed command 273 **/ 274 static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) 275 { 276 int err; 277 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 278 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 279 280 if ((rsp->flags & FCP_RSP_LEN_VALID) && 281 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 282 rsp->data.info.rsp_code)) 283 return DID_ERROR << 16; 284 285 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 286 if (err >= 0) 287 return rsp->scsi_status | (cmd_status[err].result << 16); 288 return rsp->scsi_status | (DID_ERROR << 16); 289 } 290 291 /** 292 * ibmvfc_retry_cmd - Determine if error status is retryable 293 * @status: status / error class 294 * @error: error 295 * 296 * Return value: 297 * 1 if error should be retried / 0 if it should not 298 **/ 299 static int ibmvfc_retry_cmd(u16 status, u16 error) 300 { 301 int rc = ibmvfc_get_err_index(status, error); 302 303 if (rc >= 0) 304 return cmd_status[rc].retry; 305 return 1; 306 } 307 308 static const char *unknown_fc_explain = "unknown fc explain"; 309 310 static const struct { 311 u16 fc_explain; 312 char *name; 313 } ls_explain [] = { 314 { 0x00, "no additional explanation" }, 315 { 0x01, "service parameter error - options" }, 316 { 0x03, "service parameter error - initiator control" }, 317 { 0x05, "service parameter error - recipient control" }, 318 { 0x07, "service parameter error - received data field size" }, 319 { 0x09, "service parameter error - concurrent seq" }, 320 { 0x0B, "service parameter error - credit" }, 321 { 0x0D, "invalid N_Port/F_Port_Name" }, 322 { 0x0E, "invalid node/Fabric Name" }, 323 { 0x0F, "invalid common service parameters" }, 324 { 0x11, "invalid association header" }, 325 { 0x13, "association header required" }, 326 { 0x15, "invalid originator S_ID" }, 327 { 0x17, "invalid OX_ID-RX-ID combination" }, 328 { 0x19, "command (request) already in progress" }, 329 { 0x1E, "N_Port Login requested" }, 330 { 0x1F, "Invalid N_Port_ID" }, 331 }; 332 333 static const struct { 334 u16 fc_explain; 335 char *name; 336 } gs_explain [] = { 337 { 0x00, "no additional explanation" }, 338 { 0x01, "port identifier not registered" }, 339 { 0x02, "port name not registered" }, 340 { 0x03, "node name not registered" }, 341 { 0x04, "class of service not registered" }, 342 { 0x06, "initial process associator not registered" }, 343 { 0x07, "FC-4 TYPEs not registered" }, 344 { 0x08, "symbolic port name not registered" }, 345 { 0x09, "symbolic node name not registered" }, 346 { 0x0A, "port type not registered" }, 347 { 0xF0, "authorization exception" }, 348 { 0xF1, "authentication exception" }, 349 { 0xF2, "data base full" }, 350 { 0xF3, "data base empty" }, 351 { 0xF4, "processing request" }, 352 { 0xF5, "unable to verify connection" }, 353 { 0xF6, "devices not in a common zone" }, 354 }; 355 356 /** 357 * ibmvfc_get_ls_explain - Return the FC Explain description text 358 * @status: FC Explain status 359 * 360 * Returns: 361 * error string 362 **/ 363 static const char *ibmvfc_get_ls_explain(u16 status) 364 { 365 int i; 366 367 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 368 if (ls_explain[i].fc_explain == status) 369 return ls_explain[i].name; 370 371 return unknown_fc_explain; 372 } 373 374 /** 375 * ibmvfc_get_gs_explain - Return the FC Explain description text 376 * @status: FC Explain status 377 * 378 * Returns: 379 * error string 380 **/ 381 static const char *ibmvfc_get_gs_explain(u16 status) 382 { 383 int i; 384 385 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 386 if (gs_explain[i].fc_explain == status) 387 return gs_explain[i].name; 388 389 return unknown_fc_explain; 390 } 391 392 static const struct { 393 enum ibmvfc_fc_type fc_type; 394 char *name; 395 } fc_type [] = { 396 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 397 { IBMVFC_PORT_REJECT, "port reject" }, 398 { IBMVFC_LS_REJECT, "ELS reject" }, 399 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 400 { IBMVFC_PORT_BUSY, "port busy" }, 401 { IBMVFC_BASIC_REJECT, "basic reject" }, 402 }; 403 404 static const char *unknown_fc_type = "unknown fc type"; 405 406 /** 407 * ibmvfc_get_fc_type - Return the FC Type description text 408 * @status: FC Type error status 409 * 410 * Returns: 411 * error string 412 **/ 413 static const char *ibmvfc_get_fc_type(u16 status) 414 { 415 int i; 416 417 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 418 if (fc_type[i].fc_type == status) 419 return fc_type[i].name; 420 421 return unknown_fc_type; 422 } 423 424 /** 425 * ibmvfc_set_tgt_action - Set the next init action for the target 426 * @tgt: ibmvfc target struct 427 * @action: action to perform 428 * 429 **/ 430 static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 431 enum ibmvfc_target_action action) 432 { 433 switch (tgt->action) { 434 case IBMVFC_TGT_ACTION_DEL_RPORT: 435 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) 436 tgt->action = action; 437 case IBMVFC_TGT_ACTION_DELETED_RPORT: 438 break; 439 default: 440 if (action == IBMVFC_TGT_ACTION_DEL_RPORT) 441 tgt->add_rport = 0; 442 tgt->action = action; 443 break; 444 } 445 } 446 447 /** 448 * ibmvfc_set_host_state - Set the state for the host 449 * @vhost: ibmvfc host struct 450 * @state: state to set host to 451 * 452 * Returns: 453 * 0 if state changed / non-zero if not changed 454 **/ 455 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 456 enum ibmvfc_host_state state) 457 { 458 int rc = 0; 459 460 switch (vhost->state) { 461 case IBMVFC_HOST_OFFLINE: 462 rc = -EINVAL; 463 break; 464 default: 465 vhost->state = state; 466 break; 467 }; 468 469 return rc; 470 } 471 472 /** 473 * ibmvfc_set_host_action - Set the next init action for the host 474 * @vhost: ibmvfc host struct 475 * @action: action to perform 476 * 477 **/ 478 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 479 enum ibmvfc_host_action action) 480 { 481 switch (action) { 482 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 483 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 484 vhost->action = action; 485 break; 486 case IBMVFC_HOST_ACTION_LOGO_WAIT: 487 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 488 vhost->action = action; 489 break; 490 case IBMVFC_HOST_ACTION_INIT_WAIT: 491 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 492 vhost->action = action; 493 break; 494 case IBMVFC_HOST_ACTION_QUERY: 495 switch (vhost->action) { 496 case IBMVFC_HOST_ACTION_INIT_WAIT: 497 case IBMVFC_HOST_ACTION_NONE: 498 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 499 vhost->action = action; 500 break; 501 default: 502 break; 503 }; 504 break; 505 case IBMVFC_HOST_ACTION_TGT_INIT: 506 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 507 vhost->action = action; 508 break; 509 case IBMVFC_HOST_ACTION_INIT: 510 case IBMVFC_HOST_ACTION_TGT_DEL: 511 switch (vhost->action) { 512 case IBMVFC_HOST_ACTION_RESET: 513 case IBMVFC_HOST_ACTION_REENABLE: 514 break; 515 default: 516 vhost->action = action; 517 break; 518 }; 519 break; 520 case IBMVFC_HOST_ACTION_LOGO: 521 case IBMVFC_HOST_ACTION_QUERY_TGTS: 522 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 523 case IBMVFC_HOST_ACTION_NONE: 524 case IBMVFC_HOST_ACTION_RESET: 525 case IBMVFC_HOST_ACTION_REENABLE: 526 default: 527 vhost->action = action; 528 break; 529 }; 530 } 531 532 /** 533 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 534 * @vhost: ibmvfc host struct 535 * 536 * Return value: 537 * nothing 538 **/ 539 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 540 { 541 if (vhost->action == IBMVFC_HOST_ACTION_NONE) { 542 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 543 scsi_block_requests(vhost->host); 544 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 545 } 546 } else 547 vhost->reinit = 1; 548 549 wake_up(&vhost->work_wait_q); 550 } 551 552 /** 553 * ibmvfc_link_down - Handle a link down event from the adapter 554 * @vhost: ibmvfc host struct 555 * @state: ibmvfc host state to enter 556 * 557 **/ 558 static void ibmvfc_link_down(struct ibmvfc_host *vhost, 559 enum ibmvfc_host_state state) 560 { 561 struct ibmvfc_target *tgt; 562 563 ENTER; 564 scsi_block_requests(vhost->host); 565 list_for_each_entry(tgt, &vhost->targets, queue) 566 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 567 ibmvfc_set_host_state(vhost, state); 568 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 569 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 570 wake_up(&vhost->work_wait_q); 571 LEAVE; 572 } 573 574 /** 575 * ibmvfc_init_host - Start host initialization 576 * @vhost: ibmvfc host struct 577 * 578 * Return value: 579 * nothing 580 **/ 581 static void ibmvfc_init_host(struct ibmvfc_host *vhost) 582 { 583 struct ibmvfc_target *tgt; 584 585 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 586 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 587 dev_err(vhost->dev, 588 "Host initialization retries exceeded. Taking adapter offline\n"); 589 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 590 return; 591 } 592 } 593 594 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 595 memset(vhost->async_crq.msgs, 0, PAGE_SIZE); 596 vhost->async_crq.cur = 0; 597 598 list_for_each_entry(tgt, &vhost->targets, queue) 599 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 600 scsi_block_requests(vhost->host); 601 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 602 vhost->job_step = ibmvfc_npiv_login; 603 wake_up(&vhost->work_wait_q); 604 } 605 } 606 607 /** 608 * ibmvfc_send_crq - Send a CRQ 609 * @vhost: ibmvfc host struct 610 * @word1: the first 64 bits of the data 611 * @word2: the second 64 bits of the data 612 * 613 * Return value: 614 * 0 on success / other on failure 615 **/ 616 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 617 { 618 struct vio_dev *vdev = to_vio_dev(vhost->dev); 619 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 620 } 621 622 /** 623 * ibmvfc_send_crq_init - Send a CRQ init message 624 * @vhost: ibmvfc host struct 625 * 626 * Return value: 627 * 0 on success / other on failure 628 **/ 629 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 630 { 631 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 632 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 633 } 634 635 /** 636 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 637 * @vhost: ibmvfc host struct 638 * 639 * Return value: 640 * 0 on success / other on failure 641 **/ 642 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 643 { 644 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 645 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 646 } 647 648 /** 649 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 650 * @vhost: ibmvfc host struct 651 * 652 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 653 * the crq with the hypervisor. 654 **/ 655 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 656 { 657 long rc = 0; 658 struct vio_dev *vdev = to_vio_dev(vhost->dev); 659 struct ibmvfc_crq_queue *crq = &vhost->crq; 660 661 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 662 free_irq(vdev->irq, vhost); 663 tasklet_kill(&vhost->tasklet); 664 do { 665 if (rc) 666 msleep(100); 667 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 668 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 669 670 vhost->state = IBMVFC_NO_CRQ; 671 vhost->logged_in = 0; 672 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 673 free_page((unsigned long)crq->msgs); 674 } 675 676 /** 677 * ibmvfc_reenable_crq_queue - reenables the CRQ 678 * @vhost: ibmvfc host struct 679 * 680 * Return value: 681 * 0 on success / other on failure 682 **/ 683 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 684 { 685 int rc = 0; 686 struct vio_dev *vdev = to_vio_dev(vhost->dev); 687 688 /* Re-enable the CRQ */ 689 do { 690 if (rc) 691 msleep(100); 692 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 693 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 694 695 if (rc) 696 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 697 698 return rc; 699 } 700 701 /** 702 * ibmvfc_reset_crq - resets a crq after a failure 703 * @vhost: ibmvfc host struct 704 * 705 * Return value: 706 * 0 on success / other on failure 707 **/ 708 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 709 { 710 int rc = 0; 711 unsigned long flags; 712 struct vio_dev *vdev = to_vio_dev(vhost->dev); 713 struct ibmvfc_crq_queue *crq = &vhost->crq; 714 715 /* Close the CRQ */ 716 do { 717 if (rc) 718 msleep(100); 719 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 720 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 721 722 spin_lock_irqsave(vhost->host->host_lock, flags); 723 vhost->state = IBMVFC_NO_CRQ; 724 vhost->logged_in = 0; 725 726 /* Clean out the queue */ 727 memset(crq->msgs, 0, PAGE_SIZE); 728 crq->cur = 0; 729 730 /* And re-open it again */ 731 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 732 crq->msg_token, PAGE_SIZE); 733 734 if (rc == H_CLOSED) 735 /* Adapter is good, but other end is not ready */ 736 dev_warn(vhost->dev, "Partner adapter not ready\n"); 737 else if (rc != 0) 738 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 739 spin_unlock_irqrestore(vhost->host->host_lock, flags); 740 741 return rc; 742 } 743 744 /** 745 * ibmvfc_valid_event - Determines if event is valid. 746 * @pool: event_pool that contains the event 747 * @evt: ibmvfc event to be checked for validity 748 * 749 * Return value: 750 * 1 if event is valid / 0 if event is not valid 751 **/ 752 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 753 struct ibmvfc_event *evt) 754 { 755 int index = evt - pool->events; 756 if (index < 0 || index >= pool->size) /* outside of bounds */ 757 return 0; 758 if (evt != pool->events + index) /* unaligned */ 759 return 0; 760 return 1; 761 } 762 763 /** 764 * ibmvfc_free_event - Free the specified event 765 * @evt: ibmvfc_event to be freed 766 * 767 **/ 768 static void ibmvfc_free_event(struct ibmvfc_event *evt) 769 { 770 struct ibmvfc_host *vhost = evt->vhost; 771 struct ibmvfc_event_pool *pool = &vhost->pool; 772 773 BUG_ON(!ibmvfc_valid_event(pool, evt)); 774 BUG_ON(atomic_inc_return(&evt->free) != 1); 775 list_add_tail(&evt->queue, &vhost->free); 776 } 777 778 /** 779 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 780 * @evt: ibmvfc event struct 781 * 782 * This function does not setup any error status, that must be done 783 * before this function gets called. 784 **/ 785 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 786 { 787 struct scsi_cmnd *cmnd = evt->cmnd; 788 789 if (cmnd) { 790 scsi_dma_unmap(cmnd); 791 cmnd->scsi_done(cmnd); 792 } 793 794 if (evt->eh_comp) 795 complete(evt->eh_comp); 796 797 ibmvfc_free_event(evt); 798 } 799 800 /** 801 * ibmvfc_fail_request - Fail request with specified error code 802 * @evt: ibmvfc event struct 803 * @error_code: error code to fail request with 804 * 805 * Return value: 806 * none 807 **/ 808 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 809 { 810 if (evt->cmnd) { 811 evt->cmnd->result = (error_code << 16); 812 evt->done = ibmvfc_scsi_eh_done; 813 } else 814 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED); 815 816 list_del(&evt->queue); 817 del_timer(&evt->timer); 818 ibmvfc_trc_end(evt); 819 evt->done(evt); 820 } 821 822 /** 823 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 824 * @vhost: ibmvfc host struct 825 * @error_code: error code to fail requests with 826 * 827 * Return value: 828 * none 829 **/ 830 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 831 { 832 struct ibmvfc_event *evt, *pos; 833 834 ibmvfc_dbg(vhost, "Purging all requests\n"); 835 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 836 ibmvfc_fail_request(evt, error_code); 837 } 838 839 /** 840 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 841 * @vhost: struct ibmvfc host to reset 842 **/ 843 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 844 { 845 ibmvfc_purge_requests(vhost, DID_ERROR); 846 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 847 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 848 } 849 850 /** 851 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 852 * @vhost: struct ibmvfc host to reset 853 **/ 854 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 855 { 856 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 857 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 858 scsi_block_requests(vhost->host); 859 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 860 vhost->job_step = ibmvfc_npiv_logout; 861 wake_up(&vhost->work_wait_q); 862 } else 863 ibmvfc_hard_reset_host(vhost); 864 } 865 866 /** 867 * ibmvfc_reset_host - Reset the connection to the server 868 * @vhost: ibmvfc host struct 869 **/ 870 static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 871 { 872 unsigned long flags; 873 874 spin_lock_irqsave(vhost->host->host_lock, flags); 875 __ibmvfc_reset_host(vhost); 876 spin_unlock_irqrestore(vhost->host->host_lock, flags); 877 } 878 879 /** 880 * ibmvfc_retry_host_init - Retry host initialization if allowed 881 * @vhost: ibmvfc host struct 882 * 883 * Returns: 1 if init will be retried / 0 if not 884 * 885 **/ 886 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 887 { 888 int retry = 0; 889 890 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 891 vhost->delay_init = 1; 892 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 893 dev_err(vhost->dev, 894 "Host initialization retries exceeded. Taking adapter offline\n"); 895 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 896 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 897 __ibmvfc_reset_host(vhost); 898 else { 899 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 900 retry = 1; 901 } 902 } 903 904 wake_up(&vhost->work_wait_q); 905 return retry; 906 } 907 908 /** 909 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 910 * @starget: scsi target struct 911 * 912 * Return value: 913 * ibmvfc_target struct / NULL if not found 914 **/ 915 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 916 { 917 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 918 struct ibmvfc_host *vhost = shost_priv(shost); 919 struct ibmvfc_target *tgt; 920 921 list_for_each_entry(tgt, &vhost->targets, queue) 922 if (tgt->target_id == starget->id) { 923 kref_get(&tgt->kref); 924 return tgt; 925 } 926 return NULL; 927 } 928 929 /** 930 * ibmvfc_get_target - Find the specified scsi_target 931 * @starget: scsi target struct 932 * 933 * Return value: 934 * ibmvfc_target struct / NULL if not found 935 **/ 936 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 937 { 938 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 939 struct ibmvfc_target *tgt; 940 unsigned long flags; 941 942 spin_lock_irqsave(shost->host_lock, flags); 943 tgt = __ibmvfc_get_target(starget); 944 spin_unlock_irqrestore(shost->host_lock, flags); 945 return tgt; 946 } 947 948 /** 949 * ibmvfc_get_host_speed - Get host port speed 950 * @shost: scsi host struct 951 * 952 * Return value: 953 * none 954 **/ 955 static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 956 { 957 struct ibmvfc_host *vhost = shost_priv(shost); 958 unsigned long flags; 959 960 spin_lock_irqsave(shost->host_lock, flags); 961 if (vhost->state == IBMVFC_ACTIVE) { 962 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) { 963 case 1: 964 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 965 break; 966 case 2: 967 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 968 break; 969 case 4: 970 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 971 break; 972 case 8: 973 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 974 break; 975 case 10: 976 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 977 break; 978 case 16: 979 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 980 break; 981 default: 982 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 983 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100); 984 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 985 break; 986 } 987 } else 988 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 989 spin_unlock_irqrestore(shost->host_lock, flags); 990 } 991 992 /** 993 * ibmvfc_get_host_port_state - Get host port state 994 * @shost: scsi host struct 995 * 996 * Return value: 997 * none 998 **/ 999 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 1000 { 1001 struct ibmvfc_host *vhost = shost_priv(shost); 1002 unsigned long flags; 1003 1004 spin_lock_irqsave(shost->host_lock, flags); 1005 switch (vhost->state) { 1006 case IBMVFC_INITIALIZING: 1007 case IBMVFC_ACTIVE: 1008 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 1009 break; 1010 case IBMVFC_LINK_DOWN: 1011 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 1012 break; 1013 case IBMVFC_LINK_DEAD: 1014 case IBMVFC_HOST_OFFLINE: 1015 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1016 break; 1017 case IBMVFC_HALTED: 1018 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1019 break; 1020 case IBMVFC_NO_CRQ: 1021 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1022 break; 1023 default: 1024 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1025 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1026 break; 1027 } 1028 spin_unlock_irqrestore(shost->host_lock, flags); 1029 } 1030 1031 /** 1032 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1033 * @rport: rport struct 1034 * @timeout: timeout value 1035 * 1036 * Return value: 1037 * none 1038 **/ 1039 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1040 { 1041 if (timeout) 1042 rport->dev_loss_tmo = timeout; 1043 else 1044 rport->dev_loss_tmo = 1; 1045 } 1046 1047 /** 1048 * ibmvfc_release_tgt - Free memory allocated for a target 1049 * @kref: kref struct 1050 * 1051 **/ 1052 static void ibmvfc_release_tgt(struct kref *kref) 1053 { 1054 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1055 kfree(tgt); 1056 } 1057 1058 /** 1059 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1060 * @starget: scsi target struct 1061 * 1062 * Return value: 1063 * none 1064 **/ 1065 static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1066 { 1067 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1068 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1069 if (tgt) 1070 kref_put(&tgt->kref, ibmvfc_release_tgt); 1071 } 1072 1073 /** 1074 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1075 * @starget: scsi target struct 1076 * 1077 * Return value: 1078 * none 1079 **/ 1080 static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1081 { 1082 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1083 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1084 if (tgt) 1085 kref_put(&tgt->kref, ibmvfc_release_tgt); 1086 } 1087 1088 /** 1089 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1090 * @starget: scsi target struct 1091 * 1092 * Return value: 1093 * none 1094 **/ 1095 static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1096 { 1097 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1098 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1099 if (tgt) 1100 kref_put(&tgt->kref, ibmvfc_release_tgt); 1101 } 1102 1103 /** 1104 * ibmvfc_wait_while_resetting - Wait while the host resets 1105 * @vhost: ibmvfc host struct 1106 * 1107 * Return value: 1108 * 0 on success / other on failure 1109 **/ 1110 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1111 { 1112 long timeout = wait_event_timeout(vhost->init_wait_q, 1113 ((vhost->state == IBMVFC_ACTIVE || 1114 vhost->state == IBMVFC_HOST_OFFLINE || 1115 vhost->state == IBMVFC_LINK_DEAD) && 1116 vhost->action == IBMVFC_HOST_ACTION_NONE), 1117 (init_timeout * HZ)); 1118 1119 return timeout ? 0 : -EIO; 1120 } 1121 1122 /** 1123 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1124 * @shost: scsi host struct 1125 * 1126 * Return value: 1127 * 0 on success / other on failure 1128 **/ 1129 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1130 { 1131 struct ibmvfc_host *vhost = shost_priv(shost); 1132 1133 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1134 ibmvfc_reset_host(vhost); 1135 return ibmvfc_wait_while_resetting(vhost); 1136 } 1137 1138 /** 1139 * ibmvfc_gather_partition_info - Gather info about the LPAR 1140 * 1141 * Return value: 1142 * none 1143 **/ 1144 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1145 { 1146 struct device_node *rootdn; 1147 const char *name; 1148 const unsigned int *num; 1149 1150 rootdn = of_find_node_by_path("/"); 1151 if (!rootdn) 1152 return; 1153 1154 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1155 if (name) 1156 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1157 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1158 if (num) 1159 vhost->partition_number = *num; 1160 of_node_put(rootdn); 1161 } 1162 1163 /** 1164 * ibmvfc_set_login_info - Setup info for NPIV login 1165 * @vhost: ibmvfc host struct 1166 * 1167 * Return value: 1168 * none 1169 **/ 1170 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1171 { 1172 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1173 struct device_node *of_node = vhost->dev->of_node; 1174 const char *location; 1175 1176 memset(login_info, 0, sizeof(*login_info)); 1177 1178 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX); 1179 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); 1180 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); 1181 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); 1182 login_info->partition_num = cpu_to_be32(vhost->partition_number); 1183 login_info->vfc_frame_version = cpu_to_be32(1); 1184 login_info->fcp_version = cpu_to_be16(3); 1185 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); 1186 if (vhost->client_migrated) 1187 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); 1188 1189 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ); 1190 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE); 1191 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); 1192 login_info->async.len = cpu_to_be32(vhost->async_crq.size * sizeof(*vhost->async_crq.msgs)); 1193 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1194 strncpy(login_info->device_name, 1195 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1196 1197 location = of_get_property(of_node, "ibm,loc-code", NULL); 1198 location = location ? location : dev_name(vhost->dev); 1199 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1200 } 1201 1202 /** 1203 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1204 * @vhost: ibmvfc host who owns the event pool 1205 * 1206 * Returns zero on success. 1207 **/ 1208 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1209 { 1210 int i; 1211 struct ibmvfc_event_pool *pool = &vhost->pool; 1212 1213 ENTER; 1214 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1215 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1216 if (!pool->events) 1217 return -ENOMEM; 1218 1219 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1220 pool->size * sizeof(*pool->iu_storage), 1221 &pool->iu_token, 0); 1222 1223 if (!pool->iu_storage) { 1224 kfree(pool->events); 1225 return -ENOMEM; 1226 } 1227 1228 for (i = 0; i < pool->size; ++i) { 1229 struct ibmvfc_event *evt = &pool->events[i]; 1230 atomic_set(&evt->free, 1); 1231 evt->crq.valid = 0x80; 1232 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i)); 1233 evt->xfer_iu = pool->iu_storage + i; 1234 evt->vhost = vhost; 1235 evt->ext_list = NULL; 1236 list_add_tail(&evt->queue, &vhost->free); 1237 } 1238 1239 LEAVE; 1240 return 0; 1241 } 1242 1243 /** 1244 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1245 * @vhost: ibmvfc host who owns the event pool 1246 * 1247 **/ 1248 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1249 { 1250 int i; 1251 struct ibmvfc_event_pool *pool = &vhost->pool; 1252 1253 ENTER; 1254 for (i = 0; i < pool->size; ++i) { 1255 list_del(&pool->events[i].queue); 1256 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1257 if (pool->events[i].ext_list) 1258 dma_pool_free(vhost->sg_pool, 1259 pool->events[i].ext_list, 1260 pool->events[i].ext_list_token); 1261 } 1262 1263 kfree(pool->events); 1264 dma_free_coherent(vhost->dev, 1265 pool->size * sizeof(*pool->iu_storage), 1266 pool->iu_storage, pool->iu_token); 1267 LEAVE; 1268 } 1269 1270 /** 1271 * ibmvfc_get_event - Gets the next free event in pool 1272 * @vhost: ibmvfc host struct 1273 * 1274 * Returns a free event from the pool. 1275 **/ 1276 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1277 { 1278 struct ibmvfc_event *evt; 1279 1280 BUG_ON(list_empty(&vhost->free)); 1281 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1282 atomic_set(&evt->free, 0); 1283 list_del(&evt->queue); 1284 return evt; 1285 } 1286 1287 /** 1288 * ibmvfc_init_event - Initialize fields in an event struct that are always 1289 * required. 1290 * @evt: The event 1291 * @done: Routine to call when the event is responded to 1292 * @format: SRP or MAD format 1293 **/ 1294 static void ibmvfc_init_event(struct ibmvfc_event *evt, 1295 void (*done) (struct ibmvfc_event *), u8 format) 1296 { 1297 evt->cmnd = NULL; 1298 evt->sync_iu = NULL; 1299 evt->crq.format = format; 1300 evt->done = done; 1301 evt->eh_comp = NULL; 1302 } 1303 1304 /** 1305 * ibmvfc_map_sg_list - Initialize scatterlist 1306 * @scmd: scsi command struct 1307 * @nseg: number of scatterlist segments 1308 * @md: memory descriptor list to initialize 1309 **/ 1310 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1311 struct srp_direct_buf *md) 1312 { 1313 int i; 1314 struct scatterlist *sg; 1315 1316 scsi_for_each_sg(scmd, sg, nseg, i) { 1317 md[i].va = cpu_to_be64(sg_dma_address(sg)); 1318 md[i].len = cpu_to_be32(sg_dma_len(sg)); 1319 md[i].key = 0; 1320 } 1321 } 1322 1323 /** 1324 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1325 * @scmd: Scsi_Cmnd with the scatterlist 1326 * @evt: ibmvfc event struct 1327 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1328 * @dev: device for which to map dma memory 1329 * 1330 * Returns: 1331 * 0 on success / non-zero on failure 1332 **/ 1333 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1334 struct ibmvfc_event *evt, 1335 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1336 { 1337 1338 int sg_mapped; 1339 struct srp_direct_buf *data = &vfc_cmd->ioba; 1340 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1341 1342 if (cls3_error) 1343 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR); 1344 1345 sg_mapped = scsi_dma_map(scmd); 1346 if (!sg_mapped) { 1347 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC); 1348 return 0; 1349 } else if (unlikely(sg_mapped < 0)) { 1350 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1351 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1352 return sg_mapped; 1353 } 1354 1355 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1356 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE); 1357 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1358 } else { 1359 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ); 1360 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1361 } 1362 1363 if (sg_mapped == 1) { 1364 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1365 return 0; 1366 } 1367 1368 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST); 1369 1370 if (!evt->ext_list) { 1371 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1372 &evt->ext_list_token); 1373 1374 if (!evt->ext_list) { 1375 scsi_dma_unmap(scmd); 1376 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1377 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1378 return -ENOMEM; 1379 } 1380 } 1381 1382 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1383 1384 data->va = cpu_to_be64(evt->ext_list_token); 1385 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf)); 1386 data->key = 0; 1387 return 0; 1388 } 1389 1390 /** 1391 * ibmvfc_timeout - Internal command timeout handler 1392 * @evt: struct ibmvfc_event that timed out 1393 * 1394 * Called when an internally generated command times out 1395 **/ 1396 static void ibmvfc_timeout(struct ibmvfc_event *evt) 1397 { 1398 struct ibmvfc_host *vhost = evt->vhost; 1399 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1400 ibmvfc_reset_host(vhost); 1401 } 1402 1403 /** 1404 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1405 * @evt: event to be sent 1406 * @vhost: ibmvfc host struct 1407 * @timeout: timeout in seconds - 0 means do not time command 1408 * 1409 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1410 **/ 1411 static int ibmvfc_send_event(struct ibmvfc_event *evt, 1412 struct ibmvfc_host *vhost, unsigned long timeout) 1413 { 1414 __be64 *crq_as_u64 = (__be64 *) &evt->crq; 1415 int rc; 1416 1417 /* Copy the IU into the transfer area */ 1418 *evt->xfer_iu = evt->iu; 1419 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1420 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); 1421 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1422 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); 1423 else 1424 BUG(); 1425 1426 list_add_tail(&evt->queue, &vhost->sent); 1427 init_timer(&evt->timer); 1428 1429 if (timeout) { 1430 evt->timer.data = (unsigned long) evt; 1431 evt->timer.expires = jiffies + (timeout * HZ); 1432 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; 1433 add_timer(&evt->timer); 1434 } 1435 1436 mb(); 1437 1438 if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), 1439 be64_to_cpu(crq_as_u64[1])))) { 1440 list_del(&evt->queue); 1441 del_timer(&evt->timer); 1442 1443 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1444 * Firmware will send a CRQ with a transport event (0xFF) to 1445 * tell this client what has happened to the transport. This 1446 * will be handled in ibmvfc_handle_crq() 1447 */ 1448 if (rc == H_CLOSED) { 1449 if (printk_ratelimit()) 1450 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1451 if (evt->cmnd) 1452 scsi_dma_unmap(evt->cmnd); 1453 ibmvfc_free_event(evt); 1454 return SCSI_MLQUEUE_HOST_BUSY; 1455 } 1456 1457 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1458 if (evt->cmnd) { 1459 evt->cmnd->result = DID_ERROR << 16; 1460 evt->done = ibmvfc_scsi_eh_done; 1461 } else 1462 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); 1463 1464 evt->done(evt); 1465 } else 1466 ibmvfc_trc_start(evt); 1467 1468 return 0; 1469 } 1470 1471 /** 1472 * ibmvfc_log_error - Log an error for the failed command if appropriate 1473 * @evt: ibmvfc event to log 1474 * 1475 **/ 1476 static void ibmvfc_log_error(struct ibmvfc_event *evt) 1477 { 1478 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1479 struct ibmvfc_host *vhost = evt->vhost; 1480 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1481 struct scsi_cmnd *cmnd = evt->cmnd; 1482 const char *err = unknown_error; 1483 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 1484 int logerr = 0; 1485 int rsp_code = 0; 1486 1487 if (index >= 0) { 1488 logerr = cmd_status[index].log; 1489 err = cmd_status[index].name; 1490 } 1491 1492 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1493 return; 1494 1495 if (rsp->flags & FCP_RSP_LEN_VALID) 1496 rsp_code = rsp->data.info.rsp_code; 1497 1498 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1499 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1500 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1501 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1502 } 1503 1504 /** 1505 * ibmvfc_relogin - Log back into the specified device 1506 * @sdev: scsi device struct 1507 * 1508 **/ 1509 static void ibmvfc_relogin(struct scsi_device *sdev) 1510 { 1511 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1512 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1513 struct ibmvfc_target *tgt; 1514 1515 list_for_each_entry(tgt, &vhost->targets, queue) { 1516 if (rport == tgt->rport) { 1517 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 1518 break; 1519 } 1520 } 1521 1522 ibmvfc_reinit_host(vhost); 1523 } 1524 1525 /** 1526 * ibmvfc_scsi_done - Handle responses from commands 1527 * @evt: ibmvfc event to be handled 1528 * 1529 * Used as a callback when sending scsi cmds. 1530 **/ 1531 static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1532 { 1533 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1534 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1535 struct scsi_cmnd *cmnd = evt->cmnd; 1536 u32 rsp_len = 0; 1537 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); 1538 1539 if (cmnd) { 1540 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) 1541 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); 1542 else if (rsp->flags & FCP_RESID_UNDER) 1543 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); 1544 else 1545 scsi_set_resid(cmnd, 0); 1546 1547 if (vfc_cmd->status) { 1548 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1549 1550 if (rsp->flags & FCP_RSP_LEN_VALID) 1551 rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 1552 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1553 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1554 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1555 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1556 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && 1557 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) 1558 ibmvfc_relogin(cmnd->device); 1559 1560 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1561 cmnd->result = (DID_ERROR << 16); 1562 1563 ibmvfc_log_error(evt); 1564 } 1565 1566 if (!cmnd->result && 1567 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1568 cmnd->result = (DID_ERROR << 16); 1569 1570 scsi_dma_unmap(cmnd); 1571 cmnd->scsi_done(cmnd); 1572 } 1573 1574 if (evt->eh_comp) 1575 complete(evt->eh_comp); 1576 1577 ibmvfc_free_event(evt); 1578 } 1579 1580 /** 1581 * ibmvfc_host_chkready - Check if the host can accept commands 1582 * @vhost: struct ibmvfc host 1583 * 1584 * Returns: 1585 * 1 if host can accept command / 0 if not 1586 **/ 1587 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1588 { 1589 int result = 0; 1590 1591 switch (vhost->state) { 1592 case IBMVFC_LINK_DEAD: 1593 case IBMVFC_HOST_OFFLINE: 1594 result = DID_NO_CONNECT << 16; 1595 break; 1596 case IBMVFC_NO_CRQ: 1597 case IBMVFC_INITIALIZING: 1598 case IBMVFC_HALTED: 1599 case IBMVFC_LINK_DOWN: 1600 result = DID_REQUEUE << 16; 1601 break; 1602 case IBMVFC_ACTIVE: 1603 result = 0; 1604 break; 1605 }; 1606 1607 return result; 1608 } 1609 1610 /** 1611 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1612 * @cmnd: struct scsi_cmnd to be executed 1613 * @done: Callback function to be called when cmnd is completed 1614 * 1615 * Returns: 1616 * 0 on success / other on failure 1617 **/ 1618 static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd, 1619 void (*done) (struct scsi_cmnd *)) 1620 { 1621 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1622 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1623 struct ibmvfc_cmd *vfc_cmd; 1624 struct ibmvfc_event *evt; 1625 int rc; 1626 1627 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1628 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1629 cmnd->result = rc; 1630 done(cmnd); 1631 return 0; 1632 } 1633 1634 cmnd->result = (DID_OK << 16); 1635 evt = ibmvfc_get_event(vhost); 1636 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1637 evt->cmnd = cmnd; 1638 cmnd->scsi_done = done; 1639 vfc_cmd = &evt->iu.cmd; 1640 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1641 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 1642 vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp)); 1643 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1644 vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu)); 1645 vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp)); 1646 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata); 1647 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); 1648 vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); 1649 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1650 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1651 1652 if (cmnd->flags & SCMD_TAGGED) { 1653 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag); 1654 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1655 } 1656 1657 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1658 return ibmvfc_send_event(evt, vhost, 0); 1659 1660 ibmvfc_free_event(evt); 1661 if (rc == -ENOMEM) 1662 return SCSI_MLQUEUE_HOST_BUSY; 1663 1664 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1665 scmd_printk(KERN_ERR, cmnd, 1666 "Failed to map DMA buffer for command. rc=%d\n", rc); 1667 1668 cmnd->result = DID_ERROR << 16; 1669 done(cmnd); 1670 return 0; 1671 } 1672 1673 static DEF_SCSI_QCMD(ibmvfc_queuecommand) 1674 1675 /** 1676 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1677 * @evt: ibmvfc event struct 1678 * 1679 **/ 1680 static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1681 { 1682 /* copy the response back */ 1683 if (evt->sync_iu) 1684 *evt->sync_iu = *evt->xfer_iu; 1685 1686 complete(&evt->comp); 1687 } 1688 1689 /** 1690 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 1691 * @evt: struct ibmvfc_event 1692 * 1693 **/ 1694 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 1695 { 1696 struct ibmvfc_host *vhost = evt->vhost; 1697 1698 ibmvfc_free_event(evt); 1699 vhost->aborting_passthru = 0; 1700 dev_info(vhost->dev, "Passthru command cancelled\n"); 1701 } 1702 1703 /** 1704 * ibmvfc_bsg_timeout - Handle a BSG timeout 1705 * @job: struct bsg_job that timed out 1706 * 1707 * Returns: 1708 * 0 on success / other on failure 1709 **/ 1710 static int ibmvfc_bsg_timeout(struct bsg_job *job) 1711 { 1712 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 1713 unsigned long port_id = (unsigned long)job->dd_data; 1714 struct ibmvfc_event *evt; 1715 struct ibmvfc_tmf *tmf; 1716 unsigned long flags; 1717 int rc; 1718 1719 ENTER; 1720 spin_lock_irqsave(vhost->host->host_lock, flags); 1721 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 1722 __ibmvfc_reset_host(vhost); 1723 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1724 return 0; 1725 } 1726 1727 vhost->aborting_passthru = 1; 1728 evt = ibmvfc_get_event(vhost); 1729 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 1730 1731 tmf = &evt->iu.tmf; 1732 memset(tmf, 0, sizeof(*tmf)); 1733 tmf->common.version = cpu_to_be32(1); 1734 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 1735 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 1736 tmf->scsi_id = cpu_to_be64(port_id); 1737 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 1738 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); 1739 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1740 1741 if (rc != 0) { 1742 vhost->aborting_passthru = 0; 1743 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 1744 rc = -EIO; 1745 } else 1746 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 1747 port_id); 1748 1749 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1750 1751 LEAVE; 1752 return rc; 1753 } 1754 1755 /** 1756 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 1757 * @vhost: struct ibmvfc_host to send command 1758 * @port_id: port ID to send command 1759 * 1760 * Returns: 1761 * 0 on success / other on failure 1762 **/ 1763 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 1764 { 1765 struct ibmvfc_port_login *plogi; 1766 struct ibmvfc_target *tgt; 1767 struct ibmvfc_event *evt; 1768 union ibmvfc_iu rsp_iu; 1769 unsigned long flags; 1770 int rc = 0, issue_login = 1; 1771 1772 ENTER; 1773 spin_lock_irqsave(vhost->host->host_lock, flags); 1774 list_for_each_entry(tgt, &vhost->targets, queue) { 1775 if (tgt->scsi_id == port_id) { 1776 issue_login = 0; 1777 break; 1778 } 1779 } 1780 1781 if (!issue_login) 1782 goto unlock_out; 1783 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 1784 goto unlock_out; 1785 1786 evt = ibmvfc_get_event(vhost); 1787 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1788 plogi = &evt->iu.plogi; 1789 memset(plogi, 0, sizeof(*plogi)); 1790 plogi->common.version = cpu_to_be32(1); 1791 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 1792 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 1793 plogi->scsi_id = cpu_to_be64(port_id); 1794 evt->sync_iu = &rsp_iu; 1795 init_completion(&evt->comp); 1796 1797 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1798 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1799 1800 if (rc) 1801 return -EIO; 1802 1803 wait_for_completion(&evt->comp); 1804 1805 if (rsp_iu.plogi.common.status) 1806 rc = -EIO; 1807 1808 spin_lock_irqsave(vhost->host->host_lock, flags); 1809 ibmvfc_free_event(evt); 1810 unlock_out: 1811 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1812 LEAVE; 1813 return rc; 1814 } 1815 1816 /** 1817 * ibmvfc_bsg_request - Handle a BSG request 1818 * @job: struct bsg_job to be executed 1819 * 1820 * Returns: 1821 * 0 on success / other on failure 1822 **/ 1823 static int ibmvfc_bsg_request(struct bsg_job *job) 1824 { 1825 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 1826 struct fc_rport *rport = fc_bsg_to_rport(job); 1827 struct ibmvfc_passthru_mad *mad; 1828 struct ibmvfc_event *evt; 1829 union ibmvfc_iu rsp_iu; 1830 unsigned long flags, port_id = -1; 1831 struct fc_bsg_request *bsg_request = job->request; 1832 struct fc_bsg_reply *bsg_reply = job->reply; 1833 unsigned int code = bsg_request->msgcode; 1834 int rc = 0, req_seg, rsp_seg, issue_login = 0; 1835 u32 fc_flags, rsp_len; 1836 1837 ENTER; 1838 bsg_reply->reply_payload_rcv_len = 0; 1839 if (rport) 1840 port_id = rport->port_id; 1841 1842 switch (code) { 1843 case FC_BSG_HST_ELS_NOLOGIN: 1844 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) | 1845 (bsg_request->rqst_data.h_els.port_id[1] << 8) | 1846 bsg_request->rqst_data.h_els.port_id[2]; 1847 case FC_BSG_RPT_ELS: 1848 fc_flags = IBMVFC_FC_ELS; 1849 break; 1850 case FC_BSG_HST_CT: 1851 issue_login = 1; 1852 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) | 1853 (bsg_request->rqst_data.h_ct.port_id[1] << 8) | 1854 bsg_request->rqst_data.h_ct.port_id[2]; 1855 case FC_BSG_RPT_CT: 1856 fc_flags = IBMVFC_FC_CT_IU; 1857 break; 1858 default: 1859 return -ENOTSUPP; 1860 }; 1861 1862 if (port_id == -1) 1863 return -EINVAL; 1864 if (!mutex_trylock(&vhost->passthru_mutex)) 1865 return -EBUSY; 1866 1867 job->dd_data = (void *)port_id; 1868 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 1869 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1870 1871 if (!req_seg) { 1872 mutex_unlock(&vhost->passthru_mutex); 1873 return -ENOMEM; 1874 } 1875 1876 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 1877 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1878 1879 if (!rsp_seg) { 1880 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1881 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1882 mutex_unlock(&vhost->passthru_mutex); 1883 return -ENOMEM; 1884 } 1885 1886 if (req_seg > 1 || rsp_seg > 1) { 1887 rc = -EINVAL; 1888 goto out; 1889 } 1890 1891 if (issue_login) 1892 rc = ibmvfc_bsg_plogi(vhost, port_id); 1893 1894 spin_lock_irqsave(vhost->host->host_lock, flags); 1895 1896 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 1897 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1898 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1899 goto out; 1900 } 1901 1902 evt = ibmvfc_get_event(vhost); 1903 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1904 mad = &evt->iu.passthru; 1905 1906 memset(mad, 0, sizeof(*mad)); 1907 mad->common.version = cpu_to_be32(1); 1908 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 1909 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 1910 1911 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + 1912 offsetof(struct ibmvfc_passthru_mad, iu)); 1913 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 1914 1915 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); 1916 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); 1917 mad->iu.flags = cpu_to_be32(fc_flags); 1918 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 1919 1920 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); 1921 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); 1922 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); 1923 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); 1924 mad->iu.scsi_id = cpu_to_be64(port_id); 1925 mad->iu.tag = cpu_to_be64((u64)evt); 1926 rsp_len = be32_to_cpu(mad->iu.rsp.len); 1927 1928 evt->sync_iu = &rsp_iu; 1929 init_completion(&evt->comp); 1930 rc = ibmvfc_send_event(evt, vhost, 0); 1931 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1932 1933 if (rc) { 1934 rc = -EIO; 1935 goto out; 1936 } 1937 1938 wait_for_completion(&evt->comp); 1939 1940 if (rsp_iu.passthru.common.status) 1941 rc = -EIO; 1942 else 1943 bsg_reply->reply_payload_rcv_len = rsp_len; 1944 1945 spin_lock_irqsave(vhost->host->host_lock, flags); 1946 ibmvfc_free_event(evt); 1947 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1948 bsg_reply->result = rc; 1949 bsg_job_done(job, bsg_reply->result, 1950 bsg_reply->reply_payload_rcv_len); 1951 rc = 0; 1952 out: 1953 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1954 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1955 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 1956 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1957 mutex_unlock(&vhost->passthru_mutex); 1958 LEAVE; 1959 return rc; 1960 } 1961 1962 /** 1963 * ibmvfc_reset_device - Reset the device with the specified reset type 1964 * @sdev: scsi device to reset 1965 * @type: reset type 1966 * @desc: reset type description for log messages 1967 * 1968 * Returns: 1969 * 0 on success / other on failure 1970 **/ 1971 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1972 { 1973 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1974 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1975 struct ibmvfc_cmd *tmf; 1976 struct ibmvfc_event *evt = NULL; 1977 union ibmvfc_iu rsp_iu; 1978 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1979 int rsp_rc = -EBUSY; 1980 unsigned long flags; 1981 int rsp_code = 0; 1982 1983 spin_lock_irqsave(vhost->host->host_lock, flags); 1984 if (vhost->state == IBMVFC_ACTIVE) { 1985 evt = ibmvfc_get_event(vhost); 1986 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1987 1988 tmf = &evt->iu.cmd; 1989 memset(tmf, 0, sizeof(*tmf)); 1990 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 1991 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); 1992 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1993 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); 1994 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); 1995 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 1996 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); 1997 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1998 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 1999 tmf->iu.tmf_flags = type; 2000 evt->sync_iu = &rsp_iu; 2001 2002 init_completion(&evt->comp); 2003 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2004 } 2005 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2006 2007 if (rsp_rc != 0) { 2008 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 2009 desc, rsp_rc); 2010 return -EIO; 2011 } 2012 2013 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2014 wait_for_completion(&evt->comp); 2015 2016 if (rsp_iu.cmd.status) 2017 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2018 2019 if (rsp_code) { 2020 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2021 rsp_code = fc_rsp->data.info.rsp_code; 2022 2023 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2024 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, 2025 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2026 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2027 fc_rsp->scsi_status); 2028 rsp_rc = -EIO; 2029 } else 2030 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2031 2032 spin_lock_irqsave(vhost->host->host_lock, flags); 2033 ibmvfc_free_event(evt); 2034 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2035 return rsp_rc; 2036 } 2037 2038 /** 2039 * ibmvfc_match_rport - Match function for specified remote port 2040 * @evt: ibmvfc event struct 2041 * @device: device to match (rport) 2042 * 2043 * Returns: 2044 * 1 if event matches rport / 0 if event does not match rport 2045 **/ 2046 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2047 { 2048 struct fc_rport *cmd_rport; 2049 2050 if (evt->cmnd) { 2051 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2052 if (cmd_rport == rport) 2053 return 1; 2054 } 2055 return 0; 2056 } 2057 2058 /** 2059 * ibmvfc_match_target - Match function for specified target 2060 * @evt: ibmvfc event struct 2061 * @device: device to match (starget) 2062 * 2063 * Returns: 2064 * 1 if event matches starget / 0 if event does not match starget 2065 **/ 2066 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2067 { 2068 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2069 return 1; 2070 return 0; 2071 } 2072 2073 /** 2074 * ibmvfc_match_lun - Match function for specified LUN 2075 * @evt: ibmvfc event struct 2076 * @device: device to match (sdev) 2077 * 2078 * Returns: 2079 * 1 if event matches sdev / 0 if event does not match sdev 2080 **/ 2081 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2082 { 2083 if (evt->cmnd && evt->cmnd->device == device) 2084 return 1; 2085 return 0; 2086 } 2087 2088 /** 2089 * ibmvfc_wait_for_ops - Wait for ops to complete 2090 * @vhost: ibmvfc host struct 2091 * @device: device to match (starget or sdev) 2092 * @match: match function 2093 * 2094 * Returns: 2095 * SUCCESS / FAILED 2096 **/ 2097 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2098 int (*match) (struct ibmvfc_event *, void *)) 2099 { 2100 struct ibmvfc_event *evt; 2101 DECLARE_COMPLETION_ONSTACK(comp); 2102 int wait; 2103 unsigned long flags; 2104 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2105 2106 ENTER; 2107 do { 2108 wait = 0; 2109 spin_lock_irqsave(vhost->host->host_lock, flags); 2110 list_for_each_entry(evt, &vhost->sent, queue) { 2111 if (match(evt, device)) { 2112 evt->eh_comp = ∁ 2113 wait++; 2114 } 2115 } 2116 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2117 2118 if (wait) { 2119 timeout = wait_for_completion_timeout(&comp, timeout); 2120 2121 if (!timeout) { 2122 wait = 0; 2123 spin_lock_irqsave(vhost->host->host_lock, flags); 2124 list_for_each_entry(evt, &vhost->sent, queue) { 2125 if (match(evt, device)) { 2126 evt->eh_comp = NULL; 2127 wait++; 2128 } 2129 } 2130 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2131 if (wait) 2132 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2133 LEAVE; 2134 return wait ? FAILED : SUCCESS; 2135 } 2136 } 2137 } while (wait); 2138 2139 LEAVE; 2140 return SUCCESS; 2141 } 2142 2143 /** 2144 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2145 * @sdev: scsi device to cancel commands 2146 * @type: type of error recovery being performed 2147 * 2148 * This sends a cancel to the VIOS for the specified device. This does 2149 * NOT send any abort to the actual device. That must be done separately. 2150 * 2151 * Returns: 2152 * 0 on success / other on failure 2153 **/ 2154 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2155 { 2156 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2157 struct scsi_target *starget = scsi_target(sdev); 2158 struct fc_rport *rport = starget_to_rport(starget); 2159 struct ibmvfc_tmf *tmf; 2160 struct ibmvfc_event *evt, *found_evt; 2161 union ibmvfc_iu rsp; 2162 int rsp_rc = -EBUSY; 2163 unsigned long flags; 2164 u16 status; 2165 2166 ENTER; 2167 spin_lock_irqsave(vhost->host->host_lock, flags); 2168 found_evt = NULL; 2169 list_for_each_entry(evt, &vhost->sent, queue) { 2170 if (evt->cmnd && evt->cmnd->device == sdev) { 2171 found_evt = evt; 2172 break; 2173 } 2174 } 2175 2176 if (!found_evt) { 2177 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2178 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2179 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2180 return 0; 2181 } 2182 2183 if (vhost->logged_in) { 2184 evt = ibmvfc_get_event(vhost); 2185 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2186 2187 tmf = &evt->iu.tmf; 2188 memset(tmf, 0, sizeof(*tmf)); 2189 tmf->common.version = cpu_to_be32(1); 2190 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2191 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2192 tmf->scsi_id = cpu_to_be64(rport->port_id); 2193 int_to_scsilun(sdev->lun, &tmf->lun); 2194 if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS)) 2195 type &= ~IBMVFC_TMF_SUPPRESS_ABTS; 2196 if (vhost->state == IBMVFC_ACTIVE) 2197 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); 2198 else 2199 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); 2200 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2201 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); 2202 2203 evt->sync_iu = &rsp; 2204 init_completion(&evt->comp); 2205 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2206 } 2207 2208 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2209 2210 if (rsp_rc != 0) { 2211 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2212 /* If failure is received, the host adapter is most likely going 2213 through reset, return success so the caller will wait for the command 2214 being cancelled to get returned */ 2215 return 0; 2216 } 2217 2218 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2219 2220 wait_for_completion(&evt->comp); 2221 status = be16_to_cpu(rsp.mad_common.status); 2222 spin_lock_irqsave(vhost->host->host_lock, flags); 2223 ibmvfc_free_event(evt); 2224 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2225 2226 if (status != IBMVFC_MAD_SUCCESS) { 2227 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2228 switch (status) { 2229 case IBMVFC_MAD_DRIVER_FAILED: 2230 case IBMVFC_MAD_CRQ_ERROR: 2231 /* Host adapter most likely going through reset, return success to 2232 the caller will wait for the command being cancelled to get returned */ 2233 return 0; 2234 default: 2235 return -EIO; 2236 }; 2237 } 2238 2239 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2240 return 0; 2241 } 2242 2243 /** 2244 * ibmvfc_match_key - Match function for specified cancel key 2245 * @evt: ibmvfc event struct 2246 * @key: cancel key to match 2247 * 2248 * Returns: 2249 * 1 if event matches key / 0 if event does not match key 2250 **/ 2251 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2252 { 2253 unsigned long cancel_key = (unsigned long)key; 2254 2255 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2256 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) 2257 return 1; 2258 return 0; 2259 } 2260 2261 /** 2262 * ibmvfc_match_evt - Match function for specified event 2263 * @evt: ibmvfc event struct 2264 * @match: event to match 2265 * 2266 * Returns: 2267 * 1 if event matches key / 0 if event does not match key 2268 **/ 2269 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) 2270 { 2271 if (evt == match) 2272 return 1; 2273 return 0; 2274 } 2275 2276 /** 2277 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2278 * @sdev: scsi device to abort commands 2279 * 2280 * This sends an Abort Task Set to the VIOS for the specified device. This does 2281 * NOT send any cancel to the VIOS. That must be done separately. 2282 * 2283 * Returns: 2284 * 0 on success / other on failure 2285 **/ 2286 static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2287 { 2288 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2289 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2290 struct ibmvfc_cmd *tmf; 2291 struct ibmvfc_event *evt, *found_evt; 2292 union ibmvfc_iu rsp_iu; 2293 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 2294 int rc, rsp_rc = -EBUSY; 2295 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2296 int rsp_code = 0; 2297 2298 spin_lock_irqsave(vhost->host->host_lock, flags); 2299 found_evt = NULL; 2300 list_for_each_entry(evt, &vhost->sent, queue) { 2301 if (evt->cmnd && evt->cmnd->device == sdev) { 2302 found_evt = evt; 2303 break; 2304 } 2305 } 2306 2307 if (!found_evt) { 2308 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2309 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2310 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2311 return 0; 2312 } 2313 2314 if (vhost->state == IBMVFC_ACTIVE) { 2315 evt = ibmvfc_get_event(vhost); 2316 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2317 2318 tmf = &evt->iu.cmd; 2319 memset(tmf, 0, sizeof(*tmf)); 2320 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 2321 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); 2322 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 2323 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); 2324 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); 2325 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2326 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); 2327 int_to_scsilun(sdev->lun, &tmf->iu.lun); 2328 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2329 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 2330 evt->sync_iu = &rsp_iu; 2331 2332 init_completion(&evt->comp); 2333 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2334 } 2335 2336 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2337 2338 if (rsp_rc != 0) { 2339 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2340 return -EIO; 2341 } 2342 2343 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2344 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2345 2346 if (!timeout) { 2347 rc = ibmvfc_cancel_all(sdev, 0); 2348 if (!rc) { 2349 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2350 if (rc == SUCCESS) 2351 rc = 0; 2352 } 2353 2354 if (rc) { 2355 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2356 ibmvfc_reset_host(vhost); 2357 rsp_rc = -EIO; 2358 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2359 2360 if (rc == SUCCESS) 2361 rsp_rc = 0; 2362 2363 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); 2364 if (rc != SUCCESS) { 2365 spin_lock_irqsave(vhost->host->host_lock, flags); 2366 ibmvfc_hard_reset_host(vhost); 2367 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2368 rsp_rc = 0; 2369 } 2370 2371 goto out; 2372 } 2373 } 2374 2375 if (rsp_iu.cmd.status) 2376 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2377 2378 if (rsp_code) { 2379 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2380 rsp_code = fc_rsp->data.info.rsp_code; 2381 2382 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2383 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2384 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2385 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2386 fc_rsp->scsi_status); 2387 rsp_rc = -EIO; 2388 } else 2389 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2390 2391 out: 2392 spin_lock_irqsave(vhost->host->host_lock, flags); 2393 ibmvfc_free_event(evt); 2394 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2395 return rsp_rc; 2396 } 2397 2398 /** 2399 * ibmvfc_eh_abort_handler - Abort a command 2400 * @cmd: scsi command to abort 2401 * 2402 * Returns: 2403 * SUCCESS / FAST_IO_FAIL / FAILED 2404 **/ 2405 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2406 { 2407 struct scsi_device *sdev = cmd->device; 2408 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2409 int cancel_rc, block_rc; 2410 int rc = FAILED; 2411 2412 ENTER; 2413 block_rc = fc_block_scsi_eh(cmd); 2414 ibmvfc_wait_while_resetting(vhost); 2415 if (block_rc != FAST_IO_FAIL) { 2416 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2417 ibmvfc_abort_task_set(sdev); 2418 } else 2419 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2420 2421 if (!cancel_rc) 2422 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2423 2424 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2425 rc = FAST_IO_FAIL; 2426 2427 LEAVE; 2428 return rc; 2429 } 2430 2431 /** 2432 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2433 * @cmd: scsi command struct 2434 * 2435 * Returns: 2436 * SUCCESS / FAST_IO_FAIL / FAILED 2437 **/ 2438 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2439 { 2440 struct scsi_device *sdev = cmd->device; 2441 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2442 int cancel_rc, block_rc, reset_rc = 0; 2443 int rc = FAILED; 2444 2445 ENTER; 2446 block_rc = fc_block_scsi_eh(cmd); 2447 ibmvfc_wait_while_resetting(vhost); 2448 if (block_rc != FAST_IO_FAIL) { 2449 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2450 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2451 } else 2452 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2453 2454 if (!cancel_rc && !reset_rc) 2455 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2456 2457 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2458 rc = FAST_IO_FAIL; 2459 2460 LEAVE; 2461 return rc; 2462 } 2463 2464 /** 2465 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function 2466 * @sdev: scsi device struct 2467 * @data: return code 2468 * 2469 **/ 2470 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) 2471 { 2472 unsigned long *rc = data; 2473 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2474 } 2475 2476 /** 2477 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2478 * @sdev: scsi device struct 2479 * @data: return code 2480 * 2481 **/ 2482 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2483 { 2484 unsigned long *rc = data; 2485 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2486 } 2487 2488 /** 2489 * ibmvfc_eh_target_reset_handler - Reset the target 2490 * @cmd: scsi command struct 2491 * 2492 * Returns: 2493 * SUCCESS / FAST_IO_FAIL / FAILED 2494 **/ 2495 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2496 { 2497 struct scsi_device *sdev = cmd->device; 2498 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2499 struct scsi_target *starget = scsi_target(sdev); 2500 int block_rc; 2501 int reset_rc = 0; 2502 int rc = FAILED; 2503 unsigned long cancel_rc = 0; 2504 2505 ENTER; 2506 block_rc = fc_block_scsi_eh(cmd); 2507 ibmvfc_wait_while_resetting(vhost); 2508 if (block_rc != FAST_IO_FAIL) { 2509 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2510 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2511 } else 2512 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); 2513 2514 if (!cancel_rc && !reset_rc) 2515 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2516 2517 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2518 rc = FAST_IO_FAIL; 2519 2520 LEAVE; 2521 return rc; 2522 } 2523 2524 /** 2525 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2526 * @cmd: struct scsi_cmnd having problems 2527 * 2528 **/ 2529 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2530 { 2531 int rc, block_rc; 2532 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2533 2534 block_rc = fc_block_scsi_eh(cmd); 2535 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2536 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2537 2538 if (block_rc == FAST_IO_FAIL) 2539 return FAST_IO_FAIL; 2540 2541 return rc ? FAILED : SUCCESS; 2542 } 2543 2544 /** 2545 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2546 * @rport: rport struct 2547 * 2548 * Return value: 2549 * none 2550 **/ 2551 static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2552 { 2553 struct Scsi_Host *shost = rport_to_shost(rport); 2554 struct ibmvfc_host *vhost = shost_priv(shost); 2555 struct fc_rport *dev_rport; 2556 struct scsi_device *sdev; 2557 unsigned long rc; 2558 2559 ENTER; 2560 shost_for_each_device(sdev, shost) { 2561 dev_rport = starget_to_rport(scsi_target(sdev)); 2562 if (dev_rport != rport) 2563 continue; 2564 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2565 } 2566 2567 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 2568 2569 if (rc == FAILED) 2570 ibmvfc_issue_fc_host_lip(shost); 2571 LEAVE; 2572 } 2573 2574 static const struct ibmvfc_async_desc ae_desc [] = { 2575 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2576 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2577 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2578 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2579 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2580 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, 2581 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, 2582 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, 2583 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, 2584 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, 2585 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, 2586 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, 2587 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, 2588 }; 2589 2590 static const struct ibmvfc_async_desc unknown_ae = { 2591 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL 2592 }; 2593 2594 /** 2595 * ibmvfc_get_ae_desc - Get text description for async event 2596 * @ae: async event 2597 * 2598 **/ 2599 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 2600 { 2601 int i; 2602 2603 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2604 if (ae_desc[i].ae == ae) 2605 return &ae_desc[i]; 2606 2607 return &unknown_ae; 2608 } 2609 2610 static const struct { 2611 enum ibmvfc_ae_link_state state; 2612 const char *desc; 2613 } link_desc [] = { 2614 { IBMVFC_AE_LS_LINK_UP, " link up" }, 2615 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 2616 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 2617 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 2618 }; 2619 2620 /** 2621 * ibmvfc_get_link_state - Get text description for link state 2622 * @state: link state 2623 * 2624 **/ 2625 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 2626 { 2627 int i; 2628 2629 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 2630 if (link_desc[i].state == state) 2631 return link_desc[i].desc; 2632 2633 return ""; 2634 } 2635 2636 /** 2637 * ibmvfc_handle_async - Handle an async event from the adapter 2638 * @crq: crq to process 2639 * @vhost: ibmvfc host struct 2640 * 2641 **/ 2642 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2643 struct ibmvfc_host *vhost) 2644 { 2645 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); 2646 struct ibmvfc_target *tgt; 2647 2648 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 2649 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id), 2650 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name), 2651 ibmvfc_get_link_state(crq->link_state)); 2652 2653 switch (be64_to_cpu(crq->event)) { 2654 case IBMVFC_AE_RESUME: 2655 switch (crq->link_state) { 2656 case IBMVFC_AE_LS_LINK_DOWN: 2657 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2658 break; 2659 case IBMVFC_AE_LS_LINK_DEAD: 2660 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2661 break; 2662 case IBMVFC_AE_LS_LINK_UP: 2663 case IBMVFC_AE_LS_LINK_BOUNCED: 2664 default: 2665 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2666 vhost->delay_init = 1; 2667 __ibmvfc_reset_host(vhost); 2668 break; 2669 }; 2670 2671 break; 2672 case IBMVFC_AE_LINK_UP: 2673 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2674 vhost->delay_init = 1; 2675 __ibmvfc_reset_host(vhost); 2676 break; 2677 case IBMVFC_AE_SCN_FABRIC: 2678 case IBMVFC_AE_SCN_DOMAIN: 2679 vhost->events_to_log |= IBMVFC_AE_RSCN; 2680 if (vhost->state < IBMVFC_HALTED) { 2681 vhost->delay_init = 1; 2682 __ibmvfc_reset_host(vhost); 2683 } 2684 break; 2685 case IBMVFC_AE_SCN_NPORT: 2686 case IBMVFC_AE_SCN_GROUP: 2687 vhost->events_to_log |= IBMVFC_AE_RSCN; 2688 ibmvfc_reinit_host(vhost); 2689 break; 2690 case IBMVFC_AE_ELS_LOGO: 2691 case IBMVFC_AE_ELS_PRLO: 2692 case IBMVFC_AE_ELS_PLOGI: 2693 list_for_each_entry(tgt, &vhost->targets, queue) { 2694 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 2695 break; 2696 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) 2697 continue; 2698 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) 2699 continue; 2700 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) 2701 continue; 2702 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) 2703 tgt->logo_rcvd = 1; 2704 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { 2705 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2706 ibmvfc_reinit_host(vhost); 2707 } 2708 } 2709 break; 2710 case IBMVFC_AE_LINK_DOWN: 2711 case IBMVFC_AE_ADAPTER_FAILED: 2712 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2713 break; 2714 case IBMVFC_AE_LINK_DEAD: 2715 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2716 break; 2717 case IBMVFC_AE_HALT: 2718 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2719 break; 2720 default: 2721 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2722 break; 2723 }; 2724 } 2725 2726 /** 2727 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2728 * @crq: Command/Response queue 2729 * @vhost: ibmvfc host struct 2730 * 2731 **/ 2732 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2733 { 2734 long rc; 2735 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 2736 2737 switch (crq->valid) { 2738 case IBMVFC_CRQ_INIT_RSP: 2739 switch (crq->format) { 2740 case IBMVFC_CRQ_INIT: 2741 dev_info(vhost->dev, "Partner initialized\n"); 2742 /* Send back a response */ 2743 rc = ibmvfc_send_crq_init_complete(vhost); 2744 if (rc == 0) 2745 ibmvfc_init_host(vhost); 2746 else 2747 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2748 break; 2749 case IBMVFC_CRQ_INIT_COMPLETE: 2750 dev_info(vhost->dev, "Partner initialization complete\n"); 2751 ibmvfc_init_host(vhost); 2752 break; 2753 default: 2754 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2755 } 2756 return; 2757 case IBMVFC_CRQ_XPORT_EVENT: 2758 vhost->state = IBMVFC_NO_CRQ; 2759 vhost->logged_in = 0; 2760 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2761 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2762 /* We need to re-setup the interpartition connection */ 2763 dev_info(vhost->dev, "Re-enabling adapter\n"); 2764 vhost->client_migrated = 1; 2765 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2766 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2767 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 2768 } else { 2769 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2770 ibmvfc_purge_requests(vhost, DID_ERROR); 2771 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2772 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 2773 } 2774 return; 2775 case IBMVFC_CRQ_CMD_RSP: 2776 break; 2777 default: 2778 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2779 return; 2780 } 2781 2782 if (crq->format == IBMVFC_ASYNC_EVENT) 2783 return; 2784 2785 /* The only kind of payload CRQs we should get are responses to 2786 * things we send. Make sure this response is to something we 2787 * actually sent 2788 */ 2789 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2790 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2791 crq->ioba); 2792 return; 2793 } 2794 2795 if (unlikely(atomic_read(&evt->free))) { 2796 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2797 crq->ioba); 2798 return; 2799 } 2800 2801 del_timer(&evt->timer); 2802 list_del(&evt->queue); 2803 ibmvfc_trc_end(evt); 2804 evt->done(evt); 2805 } 2806 2807 /** 2808 * ibmvfc_scan_finished - Check if the device scan is done. 2809 * @shost: scsi host struct 2810 * @time: current elapsed time 2811 * 2812 * Returns: 2813 * 0 if scan is not done / 1 if scan is done 2814 **/ 2815 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2816 { 2817 unsigned long flags; 2818 struct ibmvfc_host *vhost = shost_priv(shost); 2819 int done = 0; 2820 2821 spin_lock_irqsave(shost->host_lock, flags); 2822 if (time >= (init_timeout * HZ)) { 2823 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2824 "continuing initialization\n", init_timeout); 2825 done = 1; 2826 } 2827 2828 if (vhost->scan_complete) 2829 done = 1; 2830 spin_unlock_irqrestore(shost->host_lock, flags); 2831 return done; 2832 } 2833 2834 /** 2835 * ibmvfc_slave_alloc - Setup the device's task set value 2836 * @sdev: struct scsi_device device to configure 2837 * 2838 * Set the device's task set value so that error handling works as 2839 * expected. 2840 * 2841 * Returns: 2842 * 0 on success / -ENXIO if device does not exist 2843 **/ 2844 static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2845 { 2846 struct Scsi_Host *shost = sdev->host; 2847 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2848 struct ibmvfc_host *vhost = shost_priv(shost); 2849 unsigned long flags = 0; 2850 2851 if (!rport || fc_remote_port_chkready(rport)) 2852 return -ENXIO; 2853 2854 spin_lock_irqsave(shost->host_lock, flags); 2855 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2856 spin_unlock_irqrestore(shost->host_lock, flags); 2857 return 0; 2858 } 2859 2860 /** 2861 * ibmvfc_target_alloc - Setup the target's task set value 2862 * @starget: struct scsi_target 2863 * 2864 * Set the target's task set value so that error handling works as 2865 * expected. 2866 * 2867 * Returns: 2868 * 0 on success / -ENXIO if device does not exist 2869 **/ 2870 static int ibmvfc_target_alloc(struct scsi_target *starget) 2871 { 2872 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2873 struct ibmvfc_host *vhost = shost_priv(shost); 2874 unsigned long flags = 0; 2875 2876 spin_lock_irqsave(shost->host_lock, flags); 2877 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2878 spin_unlock_irqrestore(shost->host_lock, flags); 2879 return 0; 2880 } 2881 2882 /** 2883 * ibmvfc_slave_configure - Configure the device 2884 * @sdev: struct scsi_device device to configure 2885 * 2886 * Enable allow_restart for a device if it is a disk. Adjust the 2887 * queue_depth here also. 2888 * 2889 * Returns: 2890 * 0 2891 **/ 2892 static int ibmvfc_slave_configure(struct scsi_device *sdev) 2893 { 2894 struct Scsi_Host *shost = sdev->host; 2895 unsigned long flags = 0; 2896 2897 spin_lock_irqsave(shost->host_lock, flags); 2898 if (sdev->type == TYPE_DISK) 2899 sdev->allow_restart = 1; 2900 spin_unlock_irqrestore(shost->host_lock, flags); 2901 return 0; 2902 } 2903 2904 /** 2905 * ibmvfc_change_queue_depth - Change the device's queue depth 2906 * @sdev: scsi device struct 2907 * @qdepth: depth to set 2908 * @reason: calling context 2909 * 2910 * Return value: 2911 * actual depth set 2912 **/ 2913 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 2914 { 2915 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2916 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2917 2918 return scsi_change_queue_depth(sdev, qdepth); 2919 } 2920 2921 static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2922 struct device_attribute *attr, char *buf) 2923 { 2924 struct Scsi_Host *shost = class_to_shost(dev); 2925 struct ibmvfc_host *vhost = shost_priv(shost); 2926 2927 return snprintf(buf, PAGE_SIZE, "%s\n", 2928 vhost->login_buf->resp.partition_name); 2929 } 2930 2931 static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2932 struct device_attribute *attr, char *buf) 2933 { 2934 struct Scsi_Host *shost = class_to_shost(dev); 2935 struct ibmvfc_host *vhost = shost_priv(shost); 2936 2937 return snprintf(buf, PAGE_SIZE, "%s\n", 2938 vhost->login_buf->resp.device_name); 2939 } 2940 2941 static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2942 struct device_attribute *attr, char *buf) 2943 { 2944 struct Scsi_Host *shost = class_to_shost(dev); 2945 struct ibmvfc_host *vhost = shost_priv(shost); 2946 2947 return snprintf(buf, PAGE_SIZE, "%s\n", 2948 vhost->login_buf->resp.port_loc_code); 2949 } 2950 2951 static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2952 struct device_attribute *attr, char *buf) 2953 { 2954 struct Scsi_Host *shost = class_to_shost(dev); 2955 struct ibmvfc_host *vhost = shost_priv(shost); 2956 2957 return snprintf(buf, PAGE_SIZE, "%s\n", 2958 vhost->login_buf->resp.drc_name); 2959 } 2960 2961 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2962 struct device_attribute *attr, char *buf) 2963 { 2964 struct Scsi_Host *shost = class_to_shost(dev); 2965 struct ibmvfc_host *vhost = shost_priv(shost); 2966 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2967 } 2968 2969 static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 2970 struct device_attribute *attr, char *buf) 2971 { 2972 struct Scsi_Host *shost = class_to_shost(dev); 2973 struct ibmvfc_host *vhost = shost_priv(shost); 2974 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); 2975 } 2976 2977 /** 2978 * ibmvfc_show_log_level - Show the adapter's error logging level 2979 * @dev: class device struct 2980 * @buf: buffer 2981 * 2982 * Return value: 2983 * number of bytes printed to buffer 2984 **/ 2985 static ssize_t ibmvfc_show_log_level(struct device *dev, 2986 struct device_attribute *attr, char *buf) 2987 { 2988 struct Scsi_Host *shost = class_to_shost(dev); 2989 struct ibmvfc_host *vhost = shost_priv(shost); 2990 unsigned long flags = 0; 2991 int len; 2992 2993 spin_lock_irqsave(shost->host_lock, flags); 2994 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2995 spin_unlock_irqrestore(shost->host_lock, flags); 2996 return len; 2997 } 2998 2999 /** 3000 * ibmvfc_store_log_level - Change the adapter's error logging level 3001 * @dev: class device struct 3002 * @buf: buffer 3003 * 3004 * Return value: 3005 * number of bytes printed to buffer 3006 **/ 3007 static ssize_t ibmvfc_store_log_level(struct device *dev, 3008 struct device_attribute *attr, 3009 const char *buf, size_t count) 3010 { 3011 struct Scsi_Host *shost = class_to_shost(dev); 3012 struct ibmvfc_host *vhost = shost_priv(shost); 3013 unsigned long flags = 0; 3014 3015 spin_lock_irqsave(shost->host_lock, flags); 3016 vhost->log_level = simple_strtoul(buf, NULL, 10); 3017 spin_unlock_irqrestore(shost->host_lock, flags); 3018 return strlen(buf); 3019 } 3020 3021 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 3022 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 3023 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 3024 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 3025 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 3026 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 3027 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 3028 ibmvfc_show_log_level, ibmvfc_store_log_level); 3029 3030 #ifdef CONFIG_SCSI_IBMVFC_TRACE 3031 /** 3032 * ibmvfc_read_trace - Dump the adapter trace 3033 * @filp: open sysfs file 3034 * @kobj: kobject struct 3035 * @bin_attr: bin_attribute struct 3036 * @buf: buffer 3037 * @off: offset 3038 * @count: buffer size 3039 * 3040 * Return value: 3041 * number of bytes printed to buffer 3042 **/ 3043 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 3044 struct bin_attribute *bin_attr, 3045 char *buf, loff_t off, size_t count) 3046 { 3047 struct device *dev = container_of(kobj, struct device, kobj); 3048 struct Scsi_Host *shost = class_to_shost(dev); 3049 struct ibmvfc_host *vhost = shost_priv(shost); 3050 unsigned long flags = 0; 3051 int size = IBMVFC_TRACE_SIZE; 3052 char *src = (char *)vhost->trace; 3053 3054 if (off > size) 3055 return 0; 3056 if (off + count > size) { 3057 size -= off; 3058 count = size; 3059 } 3060 3061 spin_lock_irqsave(shost->host_lock, flags); 3062 memcpy(buf, &src[off], count); 3063 spin_unlock_irqrestore(shost->host_lock, flags); 3064 return count; 3065 } 3066 3067 static struct bin_attribute ibmvfc_trace_attr = { 3068 .attr = { 3069 .name = "trace", 3070 .mode = S_IRUGO, 3071 }, 3072 .size = 0, 3073 .read = ibmvfc_read_trace, 3074 }; 3075 #endif 3076 3077 static struct device_attribute *ibmvfc_attrs[] = { 3078 &dev_attr_partition_name, 3079 &dev_attr_device_name, 3080 &dev_attr_port_loc_code, 3081 &dev_attr_drc_name, 3082 &dev_attr_npiv_version, 3083 &dev_attr_capabilities, 3084 &dev_attr_log_level, 3085 NULL 3086 }; 3087 3088 static struct scsi_host_template driver_template = { 3089 .module = THIS_MODULE, 3090 .name = "IBM POWER Virtual FC Adapter", 3091 .proc_name = IBMVFC_NAME, 3092 .queuecommand = ibmvfc_queuecommand, 3093 .eh_timed_out = fc_eh_timed_out, 3094 .eh_abort_handler = ibmvfc_eh_abort_handler, 3095 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3096 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3097 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3098 .slave_alloc = ibmvfc_slave_alloc, 3099 .slave_configure = ibmvfc_slave_configure, 3100 .target_alloc = ibmvfc_target_alloc, 3101 .scan_finished = ibmvfc_scan_finished, 3102 .change_queue_depth = ibmvfc_change_queue_depth, 3103 .cmd_per_lun = 16, 3104 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3105 .this_id = -1, 3106 .sg_tablesize = SG_ALL, 3107 .max_sectors = IBMVFC_MAX_SECTORS, 3108 .use_clustering = ENABLE_CLUSTERING, 3109 .shost_attrs = ibmvfc_attrs, 3110 .track_queue_depth = 1, 3111 }; 3112 3113 /** 3114 * ibmvfc_next_async_crq - Returns the next entry in async queue 3115 * @vhost: ibmvfc host struct 3116 * 3117 * Returns: 3118 * Pointer to next entry in queue / NULL if empty 3119 **/ 3120 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3121 { 3122 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 3123 struct ibmvfc_async_crq *crq; 3124 3125 crq = &async_crq->msgs[async_crq->cur]; 3126 if (crq->valid & 0x80) { 3127 if (++async_crq->cur == async_crq->size) 3128 async_crq->cur = 0; 3129 rmb(); 3130 } else 3131 crq = NULL; 3132 3133 return crq; 3134 } 3135 3136 /** 3137 * ibmvfc_next_crq - Returns the next entry in message queue 3138 * @vhost: ibmvfc host struct 3139 * 3140 * Returns: 3141 * Pointer to next entry in queue / NULL if empty 3142 **/ 3143 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3144 { 3145 struct ibmvfc_crq_queue *queue = &vhost->crq; 3146 struct ibmvfc_crq *crq; 3147 3148 crq = &queue->msgs[queue->cur]; 3149 if (crq->valid & 0x80) { 3150 if (++queue->cur == queue->size) 3151 queue->cur = 0; 3152 rmb(); 3153 } else 3154 crq = NULL; 3155 3156 return crq; 3157 } 3158 3159 /** 3160 * ibmvfc_interrupt - Interrupt handler 3161 * @irq: number of irq to handle, not used 3162 * @dev_instance: ibmvfc_host that received interrupt 3163 * 3164 * Returns: 3165 * IRQ_HANDLED 3166 **/ 3167 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3168 { 3169 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3170 unsigned long flags; 3171 3172 spin_lock_irqsave(vhost->host->host_lock, flags); 3173 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3174 tasklet_schedule(&vhost->tasklet); 3175 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3176 return IRQ_HANDLED; 3177 } 3178 3179 /** 3180 * ibmvfc_tasklet - Interrupt handler tasklet 3181 * @data: ibmvfc host struct 3182 * 3183 * Returns: 3184 * Nothing 3185 **/ 3186 static void ibmvfc_tasklet(void *data) 3187 { 3188 struct ibmvfc_host *vhost = data; 3189 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3190 struct ibmvfc_crq *crq; 3191 struct ibmvfc_async_crq *async; 3192 unsigned long flags; 3193 int done = 0; 3194 3195 spin_lock_irqsave(vhost->host->host_lock, flags); 3196 while (!done) { 3197 /* Pull all the valid messages off the async CRQ */ 3198 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3199 ibmvfc_handle_async(async, vhost); 3200 async->valid = 0; 3201 wmb(); 3202 } 3203 3204 /* Pull all the valid messages off the CRQ */ 3205 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3206 ibmvfc_handle_crq(crq, vhost); 3207 crq->valid = 0; 3208 wmb(); 3209 } 3210 3211 vio_enable_interrupts(vdev); 3212 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3213 vio_disable_interrupts(vdev); 3214 ibmvfc_handle_async(async, vhost); 3215 async->valid = 0; 3216 wmb(); 3217 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3218 vio_disable_interrupts(vdev); 3219 ibmvfc_handle_crq(crq, vhost); 3220 crq->valid = 0; 3221 wmb(); 3222 } else 3223 done = 1; 3224 } 3225 3226 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3227 } 3228 3229 /** 3230 * ibmvfc_init_tgt - Set the next init job step for the target 3231 * @tgt: ibmvfc target struct 3232 * @job_step: job step to perform 3233 * 3234 **/ 3235 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3236 void (*job_step) (struct ibmvfc_target *)) 3237 { 3238 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 3239 tgt->job_step = job_step; 3240 wake_up(&tgt->vhost->work_wait_q); 3241 } 3242 3243 /** 3244 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3245 * @tgt: ibmvfc target struct 3246 * @job_step: initialization job step 3247 * 3248 * Returns: 1 if step will be retried / 0 if not 3249 * 3250 **/ 3251 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3252 void (*job_step) (struct ibmvfc_target *)) 3253 { 3254 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3255 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3256 wake_up(&tgt->vhost->work_wait_q); 3257 return 0; 3258 } else 3259 ibmvfc_init_tgt(tgt, job_step); 3260 return 1; 3261 } 3262 3263 /* Defined in FC-LS */ 3264 static const struct { 3265 int code; 3266 int retry; 3267 int logged_in; 3268 } prli_rsp [] = { 3269 { 0, 1, 0 }, 3270 { 1, 0, 1 }, 3271 { 2, 1, 0 }, 3272 { 3, 1, 0 }, 3273 { 4, 0, 0 }, 3274 { 5, 0, 0 }, 3275 { 6, 0, 1 }, 3276 { 7, 0, 0 }, 3277 { 8, 1, 0 }, 3278 }; 3279 3280 /** 3281 * ibmvfc_get_prli_rsp - Find PRLI response index 3282 * @flags: PRLI response flags 3283 * 3284 **/ 3285 static int ibmvfc_get_prli_rsp(u16 flags) 3286 { 3287 int i; 3288 int code = (flags & 0x0f00) >> 8; 3289 3290 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3291 if (prli_rsp[i].code == code) 3292 return i; 3293 3294 return 0; 3295 } 3296 3297 /** 3298 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3299 * @evt: ibmvfc event struct 3300 * 3301 **/ 3302 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3303 { 3304 struct ibmvfc_target *tgt = evt->tgt; 3305 struct ibmvfc_host *vhost = evt->vhost; 3306 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3307 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3308 u32 status = be16_to_cpu(rsp->common.status); 3309 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3310 3311 vhost->discovery_threads--; 3312 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3313 switch (status) { 3314 case IBMVFC_MAD_SUCCESS: 3315 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3316 parms->type, parms->flags, parms->service_parms); 3317 3318 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3319 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); 3320 if (prli_rsp[index].logged_in) { 3321 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { 3322 tgt->need_login = 0; 3323 tgt->ids.roles = 0; 3324 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) 3325 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3326 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) 3327 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3328 tgt->add_rport = 1; 3329 } else 3330 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3331 } else if (prli_rsp[index].retry) 3332 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3333 else 3334 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3335 } else 3336 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3337 break; 3338 case IBMVFC_MAD_DRIVER_FAILED: 3339 break; 3340 case IBMVFC_MAD_CRQ_ERROR: 3341 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3342 break; 3343 case IBMVFC_MAD_FAILED: 3344 default: 3345 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && 3346 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) 3347 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3348 else if (tgt->logo_rcvd) 3349 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3350 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3351 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3352 else 3353 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3354 3355 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3356 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3357 rsp->status, rsp->error, status); 3358 break; 3359 }; 3360 3361 kref_put(&tgt->kref, ibmvfc_release_tgt); 3362 ibmvfc_free_event(evt); 3363 wake_up(&vhost->work_wait_q); 3364 } 3365 3366 /** 3367 * ibmvfc_tgt_send_prli - Send a process login 3368 * @tgt: ibmvfc target struct 3369 * 3370 **/ 3371 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3372 { 3373 struct ibmvfc_process_login *prli; 3374 struct ibmvfc_host *vhost = tgt->vhost; 3375 struct ibmvfc_event *evt; 3376 3377 if (vhost->discovery_threads >= disc_threads) 3378 return; 3379 3380 kref_get(&tgt->kref); 3381 evt = ibmvfc_get_event(vhost); 3382 vhost->discovery_threads++; 3383 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 3384 evt->tgt = tgt; 3385 prli = &evt->iu.prli; 3386 memset(prli, 0, sizeof(*prli)); 3387 prli->common.version = cpu_to_be32(1); 3388 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); 3389 prli->common.length = cpu_to_be16(sizeof(*prli)); 3390 prli->scsi_id = cpu_to_be64(tgt->scsi_id); 3391 3392 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 3393 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); 3394 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); 3395 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED); 3396 3397 if (cls3_error) 3398 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY); 3399 3400 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3401 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3402 vhost->discovery_threads--; 3403 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3404 kref_put(&tgt->kref, ibmvfc_release_tgt); 3405 } else 3406 tgt_dbg(tgt, "Sent process login\n"); 3407 } 3408 3409 /** 3410 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 3411 * @evt: ibmvfc event struct 3412 * 3413 **/ 3414 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 3415 { 3416 struct ibmvfc_target *tgt = evt->tgt; 3417 struct ibmvfc_host *vhost = evt->vhost; 3418 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 3419 u32 status = be16_to_cpu(rsp->common.status); 3420 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3421 3422 vhost->discovery_threads--; 3423 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3424 switch (status) { 3425 case IBMVFC_MAD_SUCCESS: 3426 tgt_dbg(tgt, "Port Login succeeded\n"); 3427 if (tgt->ids.port_name && 3428 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 3429 vhost->reinit = 1; 3430 tgt_dbg(tgt, "Port re-init required\n"); 3431 break; 3432 } 3433 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3434 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3435 tgt->ids.port_id = tgt->scsi_id; 3436 memcpy(&tgt->service_parms, &rsp->service_parms, 3437 sizeof(tgt->service_parms)); 3438 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3439 sizeof(tgt->service_parms_change)); 3440 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3441 break; 3442 case IBMVFC_MAD_DRIVER_FAILED: 3443 break; 3444 case IBMVFC_MAD_CRQ_ERROR: 3445 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3446 break; 3447 case IBMVFC_MAD_FAILED: 3448 default: 3449 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3450 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3451 else 3452 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3453 3454 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3455 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), rsp->status, rsp->error, 3456 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), rsp->fc_type, 3457 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), rsp->fc_explain, status); 3458 break; 3459 }; 3460 3461 kref_put(&tgt->kref, ibmvfc_release_tgt); 3462 ibmvfc_free_event(evt); 3463 wake_up(&vhost->work_wait_q); 3464 } 3465 3466 /** 3467 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3468 * @tgt: ibmvfc target struct 3469 * 3470 **/ 3471 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3472 { 3473 struct ibmvfc_port_login *plogi; 3474 struct ibmvfc_host *vhost = tgt->vhost; 3475 struct ibmvfc_event *evt; 3476 3477 if (vhost->discovery_threads >= disc_threads) 3478 return; 3479 3480 kref_get(&tgt->kref); 3481 tgt->logo_rcvd = 0; 3482 evt = ibmvfc_get_event(vhost); 3483 vhost->discovery_threads++; 3484 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3485 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3486 evt->tgt = tgt; 3487 plogi = &evt->iu.plogi; 3488 memset(plogi, 0, sizeof(*plogi)); 3489 plogi->common.version = cpu_to_be32(1); 3490 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 3491 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 3492 plogi->scsi_id = cpu_to_be64(tgt->scsi_id); 3493 3494 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3495 vhost->discovery_threads--; 3496 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3497 kref_put(&tgt->kref, ibmvfc_release_tgt); 3498 } else 3499 tgt_dbg(tgt, "Sent port login\n"); 3500 } 3501 3502 /** 3503 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3504 * @evt: ibmvfc event struct 3505 * 3506 **/ 3507 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3508 { 3509 struct ibmvfc_target *tgt = evt->tgt; 3510 struct ibmvfc_host *vhost = evt->vhost; 3511 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3512 u32 status = be16_to_cpu(rsp->common.status); 3513 3514 vhost->discovery_threads--; 3515 ibmvfc_free_event(evt); 3516 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3517 3518 switch (status) { 3519 case IBMVFC_MAD_SUCCESS: 3520 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3521 break; 3522 case IBMVFC_MAD_DRIVER_FAILED: 3523 kref_put(&tgt->kref, ibmvfc_release_tgt); 3524 wake_up(&vhost->work_wait_q); 3525 return; 3526 case IBMVFC_MAD_FAILED: 3527 default: 3528 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3529 break; 3530 }; 3531 3532 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3533 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3534 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3535 tgt->scsi_id != tgt->new_scsi_id) 3536 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3537 kref_put(&tgt->kref, ibmvfc_release_tgt); 3538 wake_up(&vhost->work_wait_q); 3539 } 3540 3541 /** 3542 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3543 * @tgt: ibmvfc target struct 3544 * 3545 **/ 3546 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3547 { 3548 struct ibmvfc_implicit_logout *mad; 3549 struct ibmvfc_host *vhost = tgt->vhost; 3550 struct ibmvfc_event *evt; 3551 3552 if (vhost->discovery_threads >= disc_threads) 3553 return; 3554 3555 kref_get(&tgt->kref); 3556 evt = ibmvfc_get_event(vhost); 3557 vhost->discovery_threads++; 3558 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3559 evt->tgt = tgt; 3560 mad = &evt->iu.implicit_logout; 3561 memset(mad, 0, sizeof(*mad)); 3562 mad->common.version = cpu_to_be32(1); 3563 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); 3564 mad->common.length = cpu_to_be16(sizeof(*mad)); 3565 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); 3566 3567 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3568 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3569 vhost->discovery_threads--; 3570 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3571 kref_put(&tgt->kref, ibmvfc_release_tgt); 3572 } else 3573 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3574 } 3575 3576 /** 3577 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3578 * @mad: ibmvfc passthru mad struct 3579 * @tgt: ibmvfc target struct 3580 * 3581 * Returns: 3582 * 1 if PLOGI needed / 0 if PLOGI not needed 3583 **/ 3584 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3585 struct ibmvfc_target *tgt) 3586 { 3587 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3588 sizeof(tgt->ids.port_name))) 3589 return 1; 3590 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3591 sizeof(tgt->ids.node_name))) 3592 return 1; 3593 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) 3594 return 1; 3595 return 0; 3596 } 3597 3598 /** 3599 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3600 * @evt: ibmvfc event struct 3601 * 3602 **/ 3603 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3604 { 3605 struct ibmvfc_target *tgt = evt->tgt; 3606 struct ibmvfc_host *vhost = evt->vhost; 3607 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3608 u32 status = be16_to_cpu(mad->common.status); 3609 u8 fc_reason, fc_explain; 3610 3611 vhost->discovery_threads--; 3612 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3613 del_timer(&tgt->timer); 3614 3615 switch (status) { 3616 case IBMVFC_MAD_SUCCESS: 3617 tgt_dbg(tgt, "ADISC succeeded\n"); 3618 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3619 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3620 break; 3621 case IBMVFC_MAD_DRIVER_FAILED: 3622 break; 3623 case IBMVFC_MAD_FAILED: 3624 default: 3625 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3626 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; 3627 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; 3628 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3629 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), 3630 mad->iu.status, mad->iu.error, 3631 ibmvfc_get_fc_type(fc_reason), fc_reason, 3632 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3633 break; 3634 }; 3635 3636 kref_put(&tgt->kref, ibmvfc_release_tgt); 3637 ibmvfc_free_event(evt); 3638 wake_up(&vhost->work_wait_q); 3639 } 3640 3641 /** 3642 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3643 * @evt: ibmvfc event struct 3644 * 3645 **/ 3646 static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3647 { 3648 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3649 3650 memset(mad, 0, sizeof(*mad)); 3651 mad->common.version = cpu_to_be32(1); 3652 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 3653 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 3654 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3655 offsetof(struct ibmvfc_passthru_mad, iu)); 3656 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 3657 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3658 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3659 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3660 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3661 offsetof(struct ibmvfc_passthru_fc_iu, payload)); 3662 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3663 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3664 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3665 offsetof(struct ibmvfc_passthru_fc_iu, response)); 3666 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3667 } 3668 3669 /** 3670 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3671 * @evt: ibmvfc event struct 3672 * 3673 * Just cleanup this event struct. Everything else is handled by 3674 * the ADISC completion handler. If the ADISC never actually comes 3675 * back, we still have the timer running on the ADISC event struct 3676 * which will fire and cause the CRQ to get reset. 3677 * 3678 **/ 3679 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3680 { 3681 struct ibmvfc_host *vhost = evt->vhost; 3682 struct ibmvfc_target *tgt = evt->tgt; 3683 3684 tgt_dbg(tgt, "ADISC cancel complete\n"); 3685 vhost->abort_threads--; 3686 ibmvfc_free_event(evt); 3687 kref_put(&tgt->kref, ibmvfc_release_tgt); 3688 wake_up(&vhost->work_wait_q); 3689 } 3690 3691 /** 3692 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3693 * @tgt: ibmvfc target struct 3694 * 3695 * If an ADISC times out, send a cancel. If the cancel times 3696 * out, reset the CRQ. When the ADISC comes back as cancelled, 3697 * log back into the target. 3698 **/ 3699 static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) 3700 { 3701 struct ibmvfc_host *vhost = tgt->vhost; 3702 struct ibmvfc_event *evt; 3703 struct ibmvfc_tmf *tmf; 3704 unsigned long flags; 3705 int rc; 3706 3707 tgt_dbg(tgt, "ADISC timeout\n"); 3708 spin_lock_irqsave(vhost->host->host_lock, flags); 3709 if (vhost->abort_threads >= disc_threads || 3710 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3711 vhost->state != IBMVFC_INITIALIZING || 3712 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3713 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3714 return; 3715 } 3716 3717 vhost->abort_threads++; 3718 kref_get(&tgt->kref); 3719 evt = ibmvfc_get_event(vhost); 3720 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3721 3722 evt->tgt = tgt; 3723 tmf = &evt->iu.tmf; 3724 memset(tmf, 0, sizeof(*tmf)); 3725 tmf->common.version = cpu_to_be32(1); 3726 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 3727 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 3728 tmf->scsi_id = cpu_to_be64(tgt->scsi_id); 3729 tmf->cancel_key = cpu_to_be32(tgt->cancel_key); 3730 3731 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3732 3733 if (rc) { 3734 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3735 vhost->abort_threads--; 3736 kref_put(&tgt->kref, ibmvfc_release_tgt); 3737 __ibmvfc_reset_host(vhost); 3738 } else 3739 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3740 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3741 } 3742 3743 /** 3744 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3745 * @tgt: ibmvfc target struct 3746 * 3747 * When sending an ADISC we end up with two timers running. The 3748 * first timer is the timer in the ibmvfc target struct. If this 3749 * fires, we send a cancel to the target. The second timer is the 3750 * timer on the ibmvfc event for the ADISC, which is longer. If that 3751 * fires, it means the ADISC timed out and our attempt to cancel it 3752 * also failed, so we need to reset the CRQ. 3753 **/ 3754 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3755 { 3756 struct ibmvfc_passthru_mad *mad; 3757 struct ibmvfc_host *vhost = tgt->vhost; 3758 struct ibmvfc_event *evt; 3759 3760 if (vhost->discovery_threads >= disc_threads) 3761 return; 3762 3763 kref_get(&tgt->kref); 3764 evt = ibmvfc_get_event(vhost); 3765 vhost->discovery_threads++; 3766 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3767 evt->tgt = tgt; 3768 3769 ibmvfc_init_passthru(evt); 3770 mad = &evt->iu.passthru; 3771 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); 3772 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); 3773 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); 3774 3775 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); 3776 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3777 sizeof(vhost->login_buf->resp.port_name)); 3778 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3779 sizeof(vhost->login_buf->resp.node_name)); 3780 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); 3781 3782 if (timer_pending(&tgt->timer)) 3783 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3784 else { 3785 tgt->timer.data = (unsigned long) tgt; 3786 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3787 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; 3788 add_timer(&tgt->timer); 3789 } 3790 3791 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3792 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3793 vhost->discovery_threads--; 3794 del_timer(&tgt->timer); 3795 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3796 kref_put(&tgt->kref, ibmvfc_release_tgt); 3797 } else 3798 tgt_dbg(tgt, "Sent ADISC\n"); 3799 } 3800 3801 /** 3802 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3803 * @evt: ibmvfc event struct 3804 * 3805 **/ 3806 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3807 { 3808 struct ibmvfc_target *tgt = evt->tgt; 3809 struct ibmvfc_host *vhost = evt->vhost; 3810 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3811 u32 status = be16_to_cpu(rsp->common.status); 3812 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3813 3814 vhost->discovery_threads--; 3815 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3816 switch (status) { 3817 case IBMVFC_MAD_SUCCESS: 3818 tgt_dbg(tgt, "Query Target succeeded\n"); 3819 tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id); 3820 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) 3821 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3822 else 3823 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3824 break; 3825 case IBMVFC_MAD_DRIVER_FAILED: 3826 break; 3827 case IBMVFC_MAD_CRQ_ERROR: 3828 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3829 break; 3830 case IBMVFC_MAD_FAILED: 3831 default: 3832 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3833 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && 3834 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) 3835 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3836 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3837 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3838 else 3839 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3840 3841 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3842 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3843 rsp->status, rsp->error, ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), 3844 rsp->fc_type, ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), 3845 rsp->fc_explain, status); 3846 break; 3847 }; 3848 3849 kref_put(&tgt->kref, ibmvfc_release_tgt); 3850 ibmvfc_free_event(evt); 3851 wake_up(&vhost->work_wait_q); 3852 } 3853 3854 /** 3855 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3856 * @tgt: ibmvfc target struct 3857 * 3858 **/ 3859 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3860 { 3861 struct ibmvfc_query_tgt *query_tgt; 3862 struct ibmvfc_host *vhost = tgt->vhost; 3863 struct ibmvfc_event *evt; 3864 3865 if (vhost->discovery_threads >= disc_threads) 3866 return; 3867 3868 kref_get(&tgt->kref); 3869 evt = ibmvfc_get_event(vhost); 3870 vhost->discovery_threads++; 3871 evt->tgt = tgt; 3872 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3873 query_tgt = &evt->iu.query_tgt; 3874 memset(query_tgt, 0, sizeof(*query_tgt)); 3875 query_tgt->common.version = cpu_to_be32(1); 3876 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); 3877 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); 3878 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); 3879 3880 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3881 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3882 vhost->discovery_threads--; 3883 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3884 kref_put(&tgt->kref, ibmvfc_release_tgt); 3885 } else 3886 tgt_dbg(tgt, "Sent Query Target\n"); 3887 } 3888 3889 /** 3890 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3891 * @vhost: ibmvfc host struct 3892 * @scsi_id: SCSI ID to allocate target for 3893 * 3894 * Returns: 3895 * 0 on success / other on failure 3896 **/ 3897 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3898 { 3899 struct ibmvfc_target *tgt; 3900 unsigned long flags; 3901 3902 spin_lock_irqsave(vhost->host->host_lock, flags); 3903 list_for_each_entry(tgt, &vhost->targets, queue) { 3904 if (tgt->scsi_id == scsi_id) { 3905 if (tgt->need_login) 3906 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3907 goto unlock_out; 3908 } 3909 } 3910 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3911 3912 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3913 if (!tgt) { 3914 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", 3915 scsi_id); 3916 return -ENOMEM; 3917 } 3918 3919 memset(tgt, 0, sizeof(*tgt)); 3920 tgt->scsi_id = scsi_id; 3921 tgt->new_scsi_id = scsi_id; 3922 tgt->vhost = vhost; 3923 tgt->need_login = 1; 3924 tgt->cancel_key = vhost->task_set++; 3925 init_timer(&tgt->timer); 3926 kref_init(&tgt->kref); 3927 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3928 spin_lock_irqsave(vhost->host->host_lock, flags); 3929 list_add_tail(&tgt->queue, &vhost->targets); 3930 3931 unlock_out: 3932 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3933 return 0; 3934 } 3935 3936 /** 3937 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3938 * @vhost: ibmvfc host struct 3939 * 3940 * Returns: 3941 * 0 on success / other on failure 3942 **/ 3943 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3944 { 3945 int i, rc; 3946 3947 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3948 rc = ibmvfc_alloc_target(vhost, 3949 be32_to_cpu(vhost->disc_buf->scsi_id[i]) & 3950 IBMVFC_DISC_TGT_SCSI_ID_MASK); 3951 3952 return rc; 3953 } 3954 3955 /** 3956 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3957 * @evt: ibmvfc event struct 3958 * 3959 **/ 3960 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3961 { 3962 struct ibmvfc_host *vhost = evt->vhost; 3963 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3964 u32 mad_status = be16_to_cpu(rsp->common.status); 3965 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3966 3967 switch (mad_status) { 3968 case IBMVFC_MAD_SUCCESS: 3969 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3970 vhost->num_targets = be32_to_cpu(rsp->num_written); 3971 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3972 break; 3973 case IBMVFC_MAD_FAILED: 3974 level += ibmvfc_retry_host_init(vhost); 3975 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 3976 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3977 rsp->status, rsp->error); 3978 break; 3979 case IBMVFC_MAD_DRIVER_FAILED: 3980 break; 3981 default: 3982 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3983 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3984 break; 3985 } 3986 3987 ibmvfc_free_event(evt); 3988 wake_up(&vhost->work_wait_q); 3989 } 3990 3991 /** 3992 * ibmvfc_discover_targets - Send Discover Targets MAD 3993 * @vhost: ibmvfc host struct 3994 * 3995 **/ 3996 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3997 { 3998 struct ibmvfc_discover_targets *mad; 3999 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4000 4001 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 4002 mad = &evt->iu.discover_targets; 4003 memset(mad, 0, sizeof(*mad)); 4004 mad->common.version = cpu_to_be32(1); 4005 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); 4006 mad->common.length = cpu_to_be16(sizeof(*mad)); 4007 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz); 4008 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma); 4009 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz); 4010 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4011 4012 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4013 ibmvfc_dbg(vhost, "Sent discover targets\n"); 4014 else 4015 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4016 } 4017 4018 /** 4019 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 4020 * @evt: ibmvfc event struct 4021 * 4022 **/ 4023 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 4024 { 4025 struct ibmvfc_host *vhost = evt->vhost; 4026 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); 4027 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 4028 unsigned int npiv_max_sectors; 4029 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4030 4031 switch (mad_status) { 4032 case IBMVFC_MAD_SUCCESS: 4033 ibmvfc_free_event(evt); 4034 break; 4035 case IBMVFC_MAD_FAILED: 4036 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4037 level += ibmvfc_retry_host_init(vhost); 4038 else 4039 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4040 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 4041 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4042 rsp->status, rsp->error); 4043 ibmvfc_free_event(evt); 4044 return; 4045 case IBMVFC_MAD_CRQ_ERROR: 4046 ibmvfc_retry_host_init(vhost); 4047 case IBMVFC_MAD_DRIVER_FAILED: 4048 ibmvfc_free_event(evt); 4049 return; 4050 default: 4051 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 4052 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4053 ibmvfc_free_event(evt); 4054 return; 4055 } 4056 4057 vhost->client_migrated = 0; 4058 4059 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { 4060 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 4061 rsp->flags); 4062 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4063 wake_up(&vhost->work_wait_q); 4064 return; 4065 } 4066 4067 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { 4068 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 4069 rsp->max_cmds); 4070 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4071 wake_up(&vhost->work_wait_q); 4072 return; 4073 } 4074 4075 vhost->logged_in = 1; 4076 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); 4077 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 4078 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 4079 rsp->drc_name, npiv_max_sectors); 4080 4081 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); 4082 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); 4083 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); 4084 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); 4085 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 4086 fc_host_supported_classes(vhost->host) = 0; 4087 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) 4088 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 4089 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) 4090 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 4091 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) 4092 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 4093 fc_host_maxframe_size(vhost->host) = 4094 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; 4095 4096 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; 4097 vhost->host->max_sectors = npiv_max_sectors; 4098 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4099 wake_up(&vhost->work_wait_q); 4100 } 4101 4102 /** 4103 * ibmvfc_npiv_login - Sends NPIV login 4104 * @vhost: ibmvfc host struct 4105 * 4106 **/ 4107 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 4108 { 4109 struct ibmvfc_npiv_login_mad *mad; 4110 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4111 4112 ibmvfc_gather_partition_info(vhost); 4113 ibmvfc_set_login_info(vhost); 4114 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 4115 4116 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 4117 mad = &evt->iu.npiv_login; 4118 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 4119 mad->common.version = cpu_to_be32(1); 4120 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); 4121 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); 4122 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); 4123 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); 4124 4125 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4126 4127 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4128 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 4129 else 4130 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4131 }; 4132 4133 /** 4134 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 4135 * @vhost: ibmvfc host struct 4136 * 4137 **/ 4138 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 4139 { 4140 struct ibmvfc_host *vhost = evt->vhost; 4141 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); 4142 4143 ibmvfc_free_event(evt); 4144 4145 switch (mad_status) { 4146 case IBMVFC_MAD_SUCCESS: 4147 if (list_empty(&vhost->sent) && 4148 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 4149 ibmvfc_init_host(vhost); 4150 return; 4151 } 4152 break; 4153 case IBMVFC_MAD_FAILED: 4154 case IBMVFC_MAD_NOT_SUPPORTED: 4155 case IBMVFC_MAD_CRQ_ERROR: 4156 case IBMVFC_MAD_DRIVER_FAILED: 4157 default: 4158 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 4159 break; 4160 } 4161 4162 ibmvfc_hard_reset_host(vhost); 4163 } 4164 4165 /** 4166 * ibmvfc_npiv_logout - Issue an NPIV Logout 4167 * @vhost: ibmvfc host struct 4168 * 4169 **/ 4170 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 4171 { 4172 struct ibmvfc_npiv_logout_mad *mad; 4173 struct ibmvfc_event *evt; 4174 4175 evt = ibmvfc_get_event(vhost); 4176 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 4177 4178 mad = &evt->iu.npiv_logout; 4179 memset(mad, 0, sizeof(*mad)); 4180 mad->common.version = cpu_to_be32(1); 4181 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); 4182 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); 4183 4184 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 4185 4186 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4187 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 4188 else 4189 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4190 } 4191 4192 /** 4193 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 4194 * @vhost: ibmvfc host struct 4195 * 4196 * Returns: 4197 * 1 if work to do / 0 if not 4198 **/ 4199 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 4200 { 4201 struct ibmvfc_target *tgt; 4202 4203 list_for_each_entry(tgt, &vhost->targets, queue) { 4204 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 4205 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4206 return 1; 4207 } 4208 4209 return 0; 4210 } 4211 4212 /** 4213 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 4214 * @vhost: ibmvfc host struct 4215 * 4216 * Returns: 4217 * 1 if work to do / 0 if not 4218 **/ 4219 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4220 { 4221 struct ibmvfc_target *tgt; 4222 4223 if (kthread_should_stop()) 4224 return 1; 4225 switch (vhost->action) { 4226 case IBMVFC_HOST_ACTION_NONE: 4227 case IBMVFC_HOST_ACTION_INIT_WAIT: 4228 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4229 return 0; 4230 case IBMVFC_HOST_ACTION_TGT_INIT: 4231 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4232 if (vhost->discovery_threads == disc_threads) 4233 return 0; 4234 list_for_each_entry(tgt, &vhost->targets, queue) 4235 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 4236 return 1; 4237 list_for_each_entry(tgt, &vhost->targets, queue) 4238 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4239 return 0; 4240 return 1; 4241 case IBMVFC_HOST_ACTION_LOGO: 4242 case IBMVFC_HOST_ACTION_INIT: 4243 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4244 case IBMVFC_HOST_ACTION_TGT_DEL: 4245 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4246 case IBMVFC_HOST_ACTION_QUERY: 4247 case IBMVFC_HOST_ACTION_RESET: 4248 case IBMVFC_HOST_ACTION_REENABLE: 4249 default: 4250 break; 4251 }; 4252 4253 return 1; 4254 } 4255 4256 /** 4257 * ibmvfc_work_to_do - Is there task level work to do? 4258 * @vhost: ibmvfc host struct 4259 * 4260 * Returns: 4261 * 1 if work to do / 0 if not 4262 **/ 4263 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4264 { 4265 unsigned long flags; 4266 int rc; 4267 4268 spin_lock_irqsave(vhost->host->host_lock, flags); 4269 rc = __ibmvfc_work_to_do(vhost); 4270 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4271 return rc; 4272 } 4273 4274 /** 4275 * ibmvfc_log_ae - Log async events if necessary 4276 * @vhost: ibmvfc host struct 4277 * @events: events to log 4278 * 4279 **/ 4280 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 4281 { 4282 if (events & IBMVFC_AE_RSCN) 4283 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 4284 if ((events & IBMVFC_AE_LINKDOWN) && 4285 vhost->state >= IBMVFC_HALTED) 4286 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 4287 if ((events & IBMVFC_AE_LINKUP) && 4288 vhost->state == IBMVFC_INITIALIZING) 4289 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 4290 } 4291 4292 /** 4293 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 4294 * @tgt: ibmvfc target struct 4295 * 4296 **/ 4297 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 4298 { 4299 struct ibmvfc_host *vhost = tgt->vhost; 4300 struct fc_rport *rport; 4301 unsigned long flags; 4302 4303 tgt_dbg(tgt, "Adding rport\n"); 4304 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 4305 spin_lock_irqsave(vhost->host->host_lock, flags); 4306 4307 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4308 tgt_dbg(tgt, "Deleting rport\n"); 4309 list_del(&tgt->queue); 4310 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4311 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4312 fc_remote_port_delete(rport); 4313 del_timer_sync(&tgt->timer); 4314 kref_put(&tgt->kref, ibmvfc_release_tgt); 4315 return; 4316 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 4317 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4318 return; 4319 } 4320 4321 if (rport) { 4322 tgt_dbg(tgt, "rport add succeeded\n"); 4323 tgt->rport = rport; 4324 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; 4325 rport->supported_classes = 0; 4326 tgt->target_id = rport->scsi_target_id; 4327 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) 4328 rport->supported_classes |= FC_COS_CLASS1; 4329 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) 4330 rport->supported_classes |= FC_COS_CLASS2; 4331 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) 4332 rport->supported_classes |= FC_COS_CLASS3; 4333 if (rport->rqst_q) 4334 blk_queue_max_segments(rport->rqst_q, 1); 4335 } else 4336 tgt_dbg(tgt, "rport add failed\n"); 4337 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4338 } 4339 4340 /** 4341 * ibmvfc_do_work - Do task level work 4342 * @vhost: ibmvfc host struct 4343 * 4344 **/ 4345 static void ibmvfc_do_work(struct ibmvfc_host *vhost) 4346 { 4347 struct ibmvfc_target *tgt; 4348 unsigned long flags; 4349 struct fc_rport *rport; 4350 int rc; 4351 4352 ibmvfc_log_ae(vhost, vhost->events_to_log); 4353 spin_lock_irqsave(vhost->host->host_lock, flags); 4354 vhost->events_to_log = 0; 4355 switch (vhost->action) { 4356 case IBMVFC_HOST_ACTION_NONE: 4357 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4358 case IBMVFC_HOST_ACTION_INIT_WAIT: 4359 break; 4360 case IBMVFC_HOST_ACTION_RESET: 4361 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4362 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4363 rc = ibmvfc_reset_crq(vhost); 4364 spin_lock_irqsave(vhost->host->host_lock, flags); 4365 if (rc == H_CLOSED) 4366 vio_enable_interrupts(to_vio_dev(vhost->dev)); 4367 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 4368 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 4369 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4370 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 4371 } 4372 break; 4373 case IBMVFC_HOST_ACTION_REENABLE: 4374 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4375 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4376 rc = ibmvfc_reenable_crq_queue(vhost); 4377 spin_lock_irqsave(vhost->host->host_lock, flags); 4378 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 4379 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4380 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 4381 } 4382 break; 4383 case IBMVFC_HOST_ACTION_LOGO: 4384 vhost->job_step(vhost); 4385 break; 4386 case IBMVFC_HOST_ACTION_INIT: 4387 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 4388 if (vhost->delay_init) { 4389 vhost->delay_init = 0; 4390 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4391 ssleep(15); 4392 return; 4393 } else 4394 vhost->job_step(vhost); 4395 break; 4396 case IBMVFC_HOST_ACTION_QUERY: 4397 list_for_each_entry(tgt, &vhost->targets, queue) 4398 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 4399 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 4400 break; 4401 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4402 list_for_each_entry(tgt, &vhost->targets, queue) { 4403 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4404 tgt->job_step(tgt); 4405 break; 4406 } 4407 } 4408 4409 if (!ibmvfc_dev_init_to_do(vhost)) 4410 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 4411 break; 4412 case IBMVFC_HOST_ACTION_TGT_DEL: 4413 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4414 list_for_each_entry(tgt, &vhost->targets, queue) { 4415 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4416 tgt_dbg(tgt, "Deleting rport\n"); 4417 rport = tgt->rport; 4418 tgt->rport = NULL; 4419 list_del(&tgt->queue); 4420 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4421 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4422 if (rport) 4423 fc_remote_port_delete(rport); 4424 del_timer_sync(&tgt->timer); 4425 kref_put(&tgt->kref, ibmvfc_release_tgt); 4426 return; 4427 } 4428 } 4429 4430 if (vhost->state == IBMVFC_INITIALIZING) { 4431 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 4432 if (vhost->reinit) { 4433 vhost->reinit = 0; 4434 scsi_block_requests(vhost->host); 4435 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4436 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4437 } else { 4438 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 4439 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4440 wake_up(&vhost->init_wait_q); 4441 schedule_work(&vhost->rport_add_work_q); 4442 vhost->init_retries = 0; 4443 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4444 scsi_unblock_requests(vhost->host); 4445 } 4446 4447 return; 4448 } else { 4449 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 4450 vhost->job_step = ibmvfc_discover_targets; 4451 } 4452 } else { 4453 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4454 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4455 scsi_unblock_requests(vhost->host); 4456 wake_up(&vhost->init_wait_q); 4457 return; 4458 } 4459 break; 4460 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4461 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4462 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4463 ibmvfc_alloc_targets(vhost); 4464 spin_lock_irqsave(vhost->host->host_lock, flags); 4465 break; 4466 case IBMVFC_HOST_ACTION_TGT_INIT: 4467 list_for_each_entry(tgt, &vhost->targets, queue) { 4468 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4469 tgt->job_step(tgt); 4470 break; 4471 } 4472 } 4473 4474 if (!ibmvfc_dev_init_to_do(vhost)) 4475 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4476 break; 4477 default: 4478 break; 4479 }; 4480 4481 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4482 } 4483 4484 /** 4485 * ibmvfc_work - Do task level work 4486 * @data: ibmvfc host struct 4487 * 4488 * Returns: 4489 * zero 4490 **/ 4491 static int ibmvfc_work(void *data) 4492 { 4493 struct ibmvfc_host *vhost = data; 4494 int rc; 4495 4496 set_user_nice(current, MIN_NICE); 4497 4498 while (1) { 4499 rc = wait_event_interruptible(vhost->work_wait_q, 4500 ibmvfc_work_to_do(vhost)); 4501 4502 BUG_ON(rc); 4503 4504 if (kthread_should_stop()) 4505 break; 4506 4507 ibmvfc_do_work(vhost); 4508 } 4509 4510 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4511 return 0; 4512 } 4513 4514 /** 4515 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4516 * @vhost: ibmvfc host struct 4517 * 4518 * Allocates a page for messages, maps it for dma, and registers 4519 * the crq with the hypervisor. 4520 * 4521 * Return value: 4522 * zero on success / other on failure 4523 **/ 4524 static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4525 { 4526 int rc, retrc = -ENOMEM; 4527 struct device *dev = vhost->dev; 4528 struct vio_dev *vdev = to_vio_dev(dev); 4529 struct ibmvfc_crq_queue *crq = &vhost->crq; 4530 4531 ENTER; 4532 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4533 4534 if (!crq->msgs) 4535 return -ENOMEM; 4536 4537 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4538 crq->msg_token = dma_map_single(dev, crq->msgs, 4539 PAGE_SIZE, DMA_BIDIRECTIONAL); 4540 4541 if (dma_mapping_error(dev, crq->msg_token)) 4542 goto map_failed; 4543 4544 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4545 crq->msg_token, PAGE_SIZE); 4546 4547 if (rc == H_RESOURCE) 4548 /* maybe kexecing and resource is busy. try a reset */ 4549 retrc = rc = ibmvfc_reset_crq(vhost); 4550 4551 if (rc == H_CLOSED) 4552 dev_warn(dev, "Partner adapter not ready\n"); 4553 else if (rc) { 4554 dev_warn(dev, "Error %d opening adapter\n", rc); 4555 goto reg_crq_failed; 4556 } 4557 4558 retrc = 0; 4559 4560 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4561 4562 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4563 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4564 goto req_irq_failed; 4565 } 4566 4567 if ((rc = vio_enable_interrupts(vdev))) { 4568 dev_err(dev, "Error %d enabling interrupts\n", rc); 4569 goto req_irq_failed; 4570 } 4571 4572 crq->cur = 0; 4573 LEAVE; 4574 return retrc; 4575 4576 req_irq_failed: 4577 tasklet_kill(&vhost->tasklet); 4578 do { 4579 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4580 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4581 reg_crq_failed: 4582 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4583 map_failed: 4584 free_page((unsigned long)crq->msgs); 4585 return retrc; 4586 } 4587 4588 /** 4589 * ibmvfc_free_mem - Free memory for vhost 4590 * @vhost: ibmvfc host struct 4591 * 4592 * Return value: 4593 * none 4594 **/ 4595 static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4596 { 4597 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4598 4599 ENTER; 4600 mempool_destroy(vhost->tgt_pool); 4601 kfree(vhost->trace); 4602 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4603 vhost->disc_buf_dma); 4604 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4605 vhost->login_buf, vhost->login_buf_dma); 4606 dma_pool_destroy(vhost->sg_pool); 4607 dma_unmap_single(vhost->dev, async_q->msg_token, 4608 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4609 free_page((unsigned long)async_q->msgs); 4610 LEAVE; 4611 } 4612 4613 /** 4614 * ibmvfc_alloc_mem - Allocate memory for vhost 4615 * @vhost: ibmvfc host struct 4616 * 4617 * Return value: 4618 * 0 on success / non-zero on failure 4619 **/ 4620 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4621 { 4622 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4623 struct device *dev = vhost->dev; 4624 4625 ENTER; 4626 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4627 if (!async_q->msgs) { 4628 dev_err(dev, "Couldn't allocate async queue.\n"); 4629 goto nomem; 4630 } 4631 4632 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4633 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4634 async_q->size * sizeof(*async_q->msgs), 4635 DMA_BIDIRECTIONAL); 4636 4637 if (dma_mapping_error(dev, async_q->msg_token)) { 4638 dev_err(dev, "Failed to map async queue\n"); 4639 goto free_async_crq; 4640 } 4641 4642 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4643 SG_ALL * sizeof(struct srp_direct_buf), 4644 sizeof(struct srp_direct_buf), 0); 4645 4646 if (!vhost->sg_pool) { 4647 dev_err(dev, "Failed to allocate sg pool\n"); 4648 goto unmap_async_crq; 4649 } 4650 4651 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4652 &vhost->login_buf_dma, GFP_KERNEL); 4653 4654 if (!vhost->login_buf) { 4655 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4656 goto free_sg_pool; 4657 } 4658 4659 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4660 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4661 &vhost->disc_buf_dma, GFP_KERNEL); 4662 4663 if (!vhost->disc_buf) { 4664 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4665 goto free_login_buffer; 4666 } 4667 4668 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4669 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4670 4671 if (!vhost->trace) 4672 goto free_disc_buffer; 4673 4674 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4675 sizeof(struct ibmvfc_target)); 4676 4677 if (!vhost->tgt_pool) { 4678 dev_err(dev, "Couldn't allocate target memory pool\n"); 4679 goto free_trace; 4680 } 4681 4682 LEAVE; 4683 return 0; 4684 4685 free_trace: 4686 kfree(vhost->trace); 4687 free_disc_buffer: 4688 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4689 vhost->disc_buf_dma); 4690 free_login_buffer: 4691 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4692 vhost->login_buf, vhost->login_buf_dma); 4693 free_sg_pool: 4694 dma_pool_destroy(vhost->sg_pool); 4695 unmap_async_crq: 4696 dma_unmap_single(dev, async_q->msg_token, 4697 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4698 free_async_crq: 4699 free_page((unsigned long)async_q->msgs); 4700 nomem: 4701 LEAVE; 4702 return -ENOMEM; 4703 } 4704 4705 /** 4706 * ibmvfc_rport_add_thread - Worker thread for rport adds 4707 * @work: work struct 4708 * 4709 **/ 4710 static void ibmvfc_rport_add_thread(struct work_struct *work) 4711 { 4712 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4713 rport_add_work_q); 4714 struct ibmvfc_target *tgt; 4715 struct fc_rport *rport; 4716 unsigned long flags; 4717 int did_work; 4718 4719 ENTER; 4720 spin_lock_irqsave(vhost->host->host_lock, flags); 4721 do { 4722 did_work = 0; 4723 if (vhost->state != IBMVFC_ACTIVE) 4724 break; 4725 4726 list_for_each_entry(tgt, &vhost->targets, queue) { 4727 if (tgt->add_rport) { 4728 did_work = 1; 4729 tgt->add_rport = 0; 4730 kref_get(&tgt->kref); 4731 rport = tgt->rport; 4732 if (!rport) { 4733 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4734 ibmvfc_tgt_add_rport(tgt); 4735 } else if (get_device(&rport->dev)) { 4736 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4737 tgt_dbg(tgt, "Setting rport roles\n"); 4738 fc_remote_port_rolechg(rport, tgt->ids.roles); 4739 put_device(&rport->dev); 4740 } else { 4741 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4742 } 4743 4744 kref_put(&tgt->kref, ibmvfc_release_tgt); 4745 spin_lock_irqsave(vhost->host->host_lock, flags); 4746 break; 4747 } 4748 } 4749 } while(did_work); 4750 4751 if (vhost->state == IBMVFC_ACTIVE) 4752 vhost->scan_complete = 1; 4753 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4754 LEAVE; 4755 } 4756 4757 /** 4758 * ibmvfc_probe - Adapter hot plug add entry point 4759 * @vdev: vio device struct 4760 * @id: vio device id struct 4761 * 4762 * Return value: 4763 * 0 on success / non-zero on failure 4764 **/ 4765 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4766 { 4767 struct ibmvfc_host *vhost; 4768 struct Scsi_Host *shost; 4769 struct device *dev = &vdev->dev; 4770 int rc = -ENOMEM; 4771 4772 ENTER; 4773 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4774 if (!shost) { 4775 dev_err(dev, "Couldn't allocate host data\n"); 4776 goto out; 4777 } 4778 4779 shost->transportt = ibmvfc_transport_template; 4780 shost->can_queue = max_requests; 4781 shost->max_lun = max_lun; 4782 shost->max_id = max_targets; 4783 shost->max_sectors = IBMVFC_MAX_SECTORS; 4784 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4785 shost->unique_id = shost->host_no; 4786 4787 vhost = shost_priv(shost); 4788 INIT_LIST_HEAD(&vhost->sent); 4789 INIT_LIST_HEAD(&vhost->free); 4790 INIT_LIST_HEAD(&vhost->targets); 4791 sprintf(vhost->name, IBMVFC_NAME); 4792 vhost->host = shost; 4793 vhost->dev = dev; 4794 vhost->partition_number = -1; 4795 vhost->log_level = log_level; 4796 vhost->task_set = 1; 4797 strcpy(vhost->partition_name, "UNKNOWN"); 4798 init_waitqueue_head(&vhost->work_wait_q); 4799 init_waitqueue_head(&vhost->init_wait_q); 4800 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4801 mutex_init(&vhost->passthru_mutex); 4802 4803 if ((rc = ibmvfc_alloc_mem(vhost))) 4804 goto free_scsi_host; 4805 4806 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4807 shost->host_no); 4808 4809 if (IS_ERR(vhost->work_thread)) { 4810 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4811 PTR_ERR(vhost->work_thread)); 4812 goto free_host_mem; 4813 } 4814 4815 if ((rc = ibmvfc_init_crq(vhost))) { 4816 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4817 goto kill_kthread; 4818 } 4819 4820 if ((rc = ibmvfc_init_event_pool(vhost))) { 4821 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4822 goto release_crq; 4823 } 4824 4825 if ((rc = scsi_add_host(shost, dev))) 4826 goto release_event_pool; 4827 4828 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 4829 4830 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4831 &ibmvfc_trace_attr))) { 4832 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4833 goto remove_shost; 4834 } 4835 4836 if (shost_to_fc_host(shost)->rqst_q) 4837 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 4838 dev_set_drvdata(dev, vhost); 4839 spin_lock(&ibmvfc_driver_lock); 4840 list_add_tail(&vhost->queue, &ibmvfc_head); 4841 spin_unlock(&ibmvfc_driver_lock); 4842 4843 ibmvfc_send_crq_init(vhost); 4844 scsi_scan_host(shost); 4845 return 0; 4846 4847 remove_shost: 4848 scsi_remove_host(shost); 4849 release_event_pool: 4850 ibmvfc_free_event_pool(vhost); 4851 release_crq: 4852 ibmvfc_release_crq_queue(vhost); 4853 kill_kthread: 4854 kthread_stop(vhost->work_thread); 4855 free_host_mem: 4856 ibmvfc_free_mem(vhost); 4857 free_scsi_host: 4858 scsi_host_put(shost); 4859 out: 4860 LEAVE; 4861 return rc; 4862 } 4863 4864 /** 4865 * ibmvfc_remove - Adapter hot plug remove entry point 4866 * @vdev: vio device struct 4867 * 4868 * Return value: 4869 * 0 4870 **/ 4871 static int ibmvfc_remove(struct vio_dev *vdev) 4872 { 4873 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4874 unsigned long flags; 4875 4876 ENTER; 4877 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4878 4879 spin_lock_irqsave(vhost->host->host_lock, flags); 4880 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4881 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4882 4883 ibmvfc_wait_while_resetting(vhost); 4884 ibmvfc_release_crq_queue(vhost); 4885 kthread_stop(vhost->work_thread); 4886 fc_remove_host(vhost->host); 4887 scsi_remove_host(vhost->host); 4888 4889 spin_lock_irqsave(vhost->host->host_lock, flags); 4890 ibmvfc_purge_requests(vhost, DID_ERROR); 4891 ibmvfc_free_event_pool(vhost); 4892 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4893 4894 ibmvfc_free_mem(vhost); 4895 spin_lock(&ibmvfc_driver_lock); 4896 list_del(&vhost->queue); 4897 spin_unlock(&ibmvfc_driver_lock); 4898 scsi_host_put(vhost->host); 4899 LEAVE; 4900 return 0; 4901 } 4902 4903 /** 4904 * ibmvfc_resume - Resume from suspend 4905 * @dev: device struct 4906 * 4907 * We may have lost an interrupt across suspend/resume, so kick the 4908 * interrupt handler 4909 * 4910 */ 4911 static int ibmvfc_resume(struct device *dev) 4912 { 4913 unsigned long flags; 4914 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 4915 struct vio_dev *vdev = to_vio_dev(dev); 4916 4917 spin_lock_irqsave(vhost->host->host_lock, flags); 4918 vio_disable_interrupts(vdev); 4919 tasklet_schedule(&vhost->tasklet); 4920 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4921 return 0; 4922 } 4923 4924 /** 4925 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4926 * @vdev: vio device struct 4927 * 4928 * Return value: 4929 * Number of bytes the driver will need to DMA map at the same time in 4930 * order to perform well. 4931 */ 4932 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4933 { 4934 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4935 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4936 } 4937 4938 static struct vio_device_id ibmvfc_device_table[] = { 4939 {"fcp", "IBM,vfc-client"}, 4940 { "", "" } 4941 }; 4942 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4943 4944 static struct dev_pm_ops ibmvfc_pm_ops = { 4945 .resume = ibmvfc_resume 4946 }; 4947 4948 static struct vio_driver ibmvfc_driver = { 4949 .id_table = ibmvfc_device_table, 4950 .probe = ibmvfc_probe, 4951 .remove = ibmvfc_remove, 4952 .get_desired_dma = ibmvfc_get_desired_dma, 4953 .name = IBMVFC_NAME, 4954 .pm = &ibmvfc_pm_ops, 4955 }; 4956 4957 static struct fc_function_template ibmvfc_transport_functions = { 4958 .show_host_fabric_name = 1, 4959 .show_host_node_name = 1, 4960 .show_host_port_name = 1, 4961 .show_host_supported_classes = 1, 4962 .show_host_port_type = 1, 4963 .show_host_port_id = 1, 4964 .show_host_maxframe_size = 1, 4965 4966 .get_host_port_state = ibmvfc_get_host_port_state, 4967 .show_host_port_state = 1, 4968 4969 .get_host_speed = ibmvfc_get_host_speed, 4970 .show_host_speed = 1, 4971 4972 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4973 .terminate_rport_io = ibmvfc_terminate_rport_io, 4974 4975 .show_rport_maxframe_size = 1, 4976 .show_rport_supported_classes = 1, 4977 4978 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4979 .show_rport_dev_loss_tmo = 1, 4980 4981 .get_starget_node_name = ibmvfc_get_starget_node_name, 4982 .show_starget_node_name = 1, 4983 4984 .get_starget_port_name = ibmvfc_get_starget_port_name, 4985 .show_starget_port_name = 1, 4986 4987 .get_starget_port_id = ibmvfc_get_starget_port_id, 4988 .show_starget_port_id = 1, 4989 4990 .bsg_request = ibmvfc_bsg_request, 4991 .bsg_timeout = ibmvfc_bsg_timeout, 4992 }; 4993 4994 /** 4995 * ibmvfc_module_init - Initialize the ibmvfc module 4996 * 4997 * Return value: 4998 * 0 on success / other on failure 4999 **/ 5000 static int __init ibmvfc_module_init(void) 5001 { 5002 int rc; 5003 5004 if (!firmware_has_feature(FW_FEATURE_VIO)) 5005 return -ENODEV; 5006 5007 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 5008 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 5009 5010 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 5011 if (!ibmvfc_transport_template) 5012 return -ENOMEM; 5013 5014 rc = vio_register_driver(&ibmvfc_driver); 5015 if (rc) 5016 fc_release_transport(ibmvfc_transport_template); 5017 return rc; 5018 } 5019 5020 /** 5021 * ibmvfc_module_exit - Teardown the ibmvfc module 5022 * 5023 * Return value: 5024 * nothing 5025 **/ 5026 static void __exit ibmvfc_module_exit(void) 5027 { 5028 vio_unregister_driver(&ibmvfc_driver); 5029 fc_release_transport(ibmvfc_transport_template); 5030 } 5031 5032 module_init(ibmvfc_module_init); 5033 module_exit(ibmvfc_module_exit); 5034