1 /* 2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 3 * 4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 5 * 6 * Copyright (C) IBM Corporation, 2008 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24 #include <linux/module.h> 25 #include <linux/moduleparam.h> 26 #include <linux/dma-mapping.h> 27 #include <linux/dmapool.h> 28 #include <linux/delay.h> 29 #include <linux/interrupt.h> 30 #include <linux/kthread.h> 31 #include <linux/slab.h> 32 #include <linux/of.h> 33 #include <linux/pm.h> 34 #include <linux/stringify.h> 35 #include <asm/firmware.h> 36 #include <asm/irq.h> 37 #include <asm/vio.h> 38 #include <scsi/scsi.h> 39 #include <scsi/scsi_cmnd.h> 40 #include <scsi/scsi_host.h> 41 #include <scsi/scsi_device.h> 42 #include <scsi/scsi_tcq.h> 43 #include <scsi/scsi_transport_fc.h> 44 #include <scsi/scsi_bsg_fc.h> 45 #include "ibmvfc.h" 46 47 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 48 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 49 static u64 max_lun = IBMVFC_MAX_LUN; 50 static unsigned int max_targets = IBMVFC_MAX_TARGETS; 51 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 52 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 53 static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 54 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 55 static LIST_HEAD(ibmvfc_head); 56 static DEFINE_SPINLOCK(ibmvfc_driver_lock); 57 static struct scsi_transport_template *ibmvfc_transport_template; 58 59 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 60 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 61 MODULE_LICENSE("GPL"); 62 MODULE_VERSION(IBMVFC_DRIVER_VERSION); 63 64 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 65 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 66 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 67 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 68 MODULE_PARM_DESC(default_timeout, 69 "Default timeout in seconds for initialization and EH commands. " 70 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 71 module_param_named(max_requests, max_requests, uint, S_IRUGO); 72 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 73 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 74 module_param_named(max_lun, max_lun, ullong, S_IRUGO); 75 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 76 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 77 module_param_named(max_targets, max_targets, uint, S_IRUGO); 78 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 79 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 80 module_param_named(disc_threads, disc_threads, uint, S_IRUGO); 81 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 82 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 83 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 84 MODULE_PARM_DESC(debug, "Enable driver debug information. " 85 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 86 module_param_named(log_level, log_level, uint, 0); 87 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 88 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 89 90 static const struct { 91 u16 status; 92 u16 error; 93 u8 result; 94 u8 retry; 95 int log; 96 char *name; 97 } cmd_status [] = { 98 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 99 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 100 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 101 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 102 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 103 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 104 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 105 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 106 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 107 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 108 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 109 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 110 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 111 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 112 113 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 114 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 115 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 116 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 117 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 118 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 119 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 120 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 121 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 122 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 123 124 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 125 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 126 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 128 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 129 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 130 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 131 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 132 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 133 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 134 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 135 136 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 137 }; 138 139 static void ibmvfc_npiv_login(struct ibmvfc_host *); 140 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 141 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 142 static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 143 static void ibmvfc_npiv_logout(struct ibmvfc_host *); 144 145 static const char *unknown_error = "unknown error"; 146 147 #ifdef CONFIG_SCSI_IBMVFC_TRACE 148 /** 149 * ibmvfc_trc_start - Log a start trace entry 150 * @evt: ibmvfc event struct 151 * 152 **/ 153 static void ibmvfc_trc_start(struct ibmvfc_event *evt) 154 { 155 struct ibmvfc_host *vhost = evt->vhost; 156 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 157 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 158 struct ibmvfc_trace_entry *entry; 159 160 entry = &vhost->trace[vhost->trace_index++]; 161 entry->evt = evt; 162 entry->time = jiffies; 163 entry->fmt = evt->crq.format; 164 entry->type = IBMVFC_TRC_START; 165 166 switch (entry->fmt) { 167 case IBMVFC_CMD_FORMAT: 168 entry->op_code = vfc_cmd->iu.cdb[0]; 169 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 170 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 171 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 172 entry->u.start.xfer_len = be32_to_cpu(vfc_cmd->iu.xfer_len); 173 break; 174 case IBMVFC_MAD_FORMAT: 175 entry->op_code = be32_to_cpu(mad->opcode); 176 break; 177 default: 178 break; 179 }; 180 } 181 182 /** 183 * ibmvfc_trc_end - Log an end trace entry 184 * @evt: ibmvfc event struct 185 * 186 **/ 187 static void ibmvfc_trc_end(struct ibmvfc_event *evt) 188 { 189 struct ibmvfc_host *vhost = evt->vhost; 190 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 191 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 192 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; 193 194 entry->evt = evt; 195 entry->time = jiffies; 196 entry->fmt = evt->crq.format; 197 entry->type = IBMVFC_TRC_END; 198 199 switch (entry->fmt) { 200 case IBMVFC_CMD_FORMAT: 201 entry->op_code = vfc_cmd->iu.cdb[0]; 202 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 203 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 204 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 205 entry->u.end.status = be16_to_cpu(vfc_cmd->status); 206 entry->u.end.error = be16_to_cpu(vfc_cmd->error); 207 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; 208 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; 209 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; 210 break; 211 case IBMVFC_MAD_FORMAT: 212 entry->op_code = be32_to_cpu(mad->opcode); 213 entry->u.end.status = be16_to_cpu(mad->status); 214 break; 215 default: 216 break; 217 218 }; 219 } 220 221 #else 222 #define ibmvfc_trc_start(evt) do { } while (0) 223 #define ibmvfc_trc_end(evt) do { } while (0) 224 #endif 225 226 /** 227 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 228 * @status: status / error class 229 * @error: error 230 * 231 * Return value: 232 * index into cmd_status / -EINVAL on failure 233 **/ 234 static int ibmvfc_get_err_index(u16 status, u16 error) 235 { 236 int i; 237 238 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 239 if ((cmd_status[i].status & status) == cmd_status[i].status && 240 cmd_status[i].error == error) 241 return i; 242 243 return -EINVAL; 244 } 245 246 /** 247 * ibmvfc_get_cmd_error - Find the error description for the fcp response 248 * @status: status / error class 249 * @error: error 250 * 251 * Return value: 252 * error description string 253 **/ 254 static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 255 { 256 int rc = ibmvfc_get_err_index(status, error); 257 if (rc >= 0) 258 return cmd_status[rc].name; 259 return unknown_error; 260 } 261 262 /** 263 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 264 * @vfc_cmd: ibmvfc command struct 265 * 266 * Return value: 267 * SCSI result value to return for completed command 268 **/ 269 static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) 270 { 271 int err; 272 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 273 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 274 275 if ((rsp->flags & FCP_RSP_LEN_VALID) && 276 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 277 rsp->data.info.rsp_code)) 278 return DID_ERROR << 16; 279 280 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 281 if (err >= 0) 282 return rsp->scsi_status | (cmd_status[err].result << 16); 283 return rsp->scsi_status | (DID_ERROR << 16); 284 } 285 286 /** 287 * ibmvfc_retry_cmd - Determine if error status is retryable 288 * @status: status / error class 289 * @error: error 290 * 291 * Return value: 292 * 1 if error should be retried / 0 if it should not 293 **/ 294 static int ibmvfc_retry_cmd(u16 status, u16 error) 295 { 296 int rc = ibmvfc_get_err_index(status, error); 297 298 if (rc >= 0) 299 return cmd_status[rc].retry; 300 return 1; 301 } 302 303 static const char *unknown_fc_explain = "unknown fc explain"; 304 305 static const struct { 306 u16 fc_explain; 307 char *name; 308 } ls_explain [] = { 309 { 0x00, "no additional explanation" }, 310 { 0x01, "service parameter error - options" }, 311 { 0x03, "service parameter error - initiator control" }, 312 { 0x05, "service parameter error - recipient control" }, 313 { 0x07, "service parameter error - received data field size" }, 314 { 0x09, "service parameter error - concurrent seq" }, 315 { 0x0B, "service parameter error - credit" }, 316 { 0x0D, "invalid N_Port/F_Port_Name" }, 317 { 0x0E, "invalid node/Fabric Name" }, 318 { 0x0F, "invalid common service parameters" }, 319 { 0x11, "invalid association header" }, 320 { 0x13, "association header required" }, 321 { 0x15, "invalid originator S_ID" }, 322 { 0x17, "invalid OX_ID-RX-ID combination" }, 323 { 0x19, "command (request) already in progress" }, 324 { 0x1E, "N_Port Login requested" }, 325 { 0x1F, "Invalid N_Port_ID" }, 326 }; 327 328 static const struct { 329 u16 fc_explain; 330 char *name; 331 } gs_explain [] = { 332 { 0x00, "no additional explanation" }, 333 { 0x01, "port identifier not registered" }, 334 { 0x02, "port name not registered" }, 335 { 0x03, "node name not registered" }, 336 { 0x04, "class of service not registered" }, 337 { 0x06, "initial process associator not registered" }, 338 { 0x07, "FC-4 TYPEs not registered" }, 339 { 0x08, "symbolic port name not registered" }, 340 { 0x09, "symbolic node name not registered" }, 341 { 0x0A, "port type not registered" }, 342 { 0xF0, "authorization exception" }, 343 { 0xF1, "authentication exception" }, 344 { 0xF2, "data base full" }, 345 { 0xF3, "data base empty" }, 346 { 0xF4, "processing request" }, 347 { 0xF5, "unable to verify connection" }, 348 { 0xF6, "devices not in a common zone" }, 349 }; 350 351 /** 352 * ibmvfc_get_ls_explain - Return the FC Explain description text 353 * @status: FC Explain status 354 * 355 * Returns: 356 * error string 357 **/ 358 static const char *ibmvfc_get_ls_explain(u16 status) 359 { 360 int i; 361 362 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 363 if (ls_explain[i].fc_explain == status) 364 return ls_explain[i].name; 365 366 return unknown_fc_explain; 367 } 368 369 /** 370 * ibmvfc_get_gs_explain - Return the FC Explain description text 371 * @status: FC Explain status 372 * 373 * Returns: 374 * error string 375 **/ 376 static const char *ibmvfc_get_gs_explain(u16 status) 377 { 378 int i; 379 380 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 381 if (gs_explain[i].fc_explain == status) 382 return gs_explain[i].name; 383 384 return unknown_fc_explain; 385 } 386 387 static const struct { 388 enum ibmvfc_fc_type fc_type; 389 char *name; 390 } fc_type [] = { 391 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 392 { IBMVFC_PORT_REJECT, "port reject" }, 393 { IBMVFC_LS_REJECT, "ELS reject" }, 394 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 395 { IBMVFC_PORT_BUSY, "port busy" }, 396 { IBMVFC_BASIC_REJECT, "basic reject" }, 397 }; 398 399 static const char *unknown_fc_type = "unknown fc type"; 400 401 /** 402 * ibmvfc_get_fc_type - Return the FC Type description text 403 * @status: FC Type error status 404 * 405 * Returns: 406 * error string 407 **/ 408 static const char *ibmvfc_get_fc_type(u16 status) 409 { 410 int i; 411 412 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 413 if (fc_type[i].fc_type == status) 414 return fc_type[i].name; 415 416 return unknown_fc_type; 417 } 418 419 /** 420 * ibmvfc_set_tgt_action - Set the next init action for the target 421 * @tgt: ibmvfc target struct 422 * @action: action to perform 423 * 424 **/ 425 static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 426 enum ibmvfc_target_action action) 427 { 428 switch (tgt->action) { 429 case IBMVFC_TGT_ACTION_DEL_RPORT: 430 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) 431 tgt->action = action; 432 case IBMVFC_TGT_ACTION_DELETED_RPORT: 433 break; 434 default: 435 if (action == IBMVFC_TGT_ACTION_DEL_RPORT) 436 tgt->add_rport = 0; 437 tgt->action = action; 438 break; 439 } 440 } 441 442 /** 443 * ibmvfc_set_host_state - Set the state for the host 444 * @vhost: ibmvfc host struct 445 * @state: state to set host to 446 * 447 * Returns: 448 * 0 if state changed / non-zero if not changed 449 **/ 450 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 451 enum ibmvfc_host_state state) 452 { 453 int rc = 0; 454 455 switch (vhost->state) { 456 case IBMVFC_HOST_OFFLINE: 457 rc = -EINVAL; 458 break; 459 default: 460 vhost->state = state; 461 break; 462 }; 463 464 return rc; 465 } 466 467 /** 468 * ibmvfc_set_host_action - Set the next init action for the host 469 * @vhost: ibmvfc host struct 470 * @action: action to perform 471 * 472 **/ 473 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 474 enum ibmvfc_host_action action) 475 { 476 switch (action) { 477 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 478 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 479 vhost->action = action; 480 break; 481 case IBMVFC_HOST_ACTION_LOGO_WAIT: 482 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 483 vhost->action = action; 484 break; 485 case IBMVFC_HOST_ACTION_INIT_WAIT: 486 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 487 vhost->action = action; 488 break; 489 case IBMVFC_HOST_ACTION_QUERY: 490 switch (vhost->action) { 491 case IBMVFC_HOST_ACTION_INIT_WAIT: 492 case IBMVFC_HOST_ACTION_NONE: 493 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 494 vhost->action = action; 495 break; 496 default: 497 break; 498 }; 499 break; 500 case IBMVFC_HOST_ACTION_TGT_INIT: 501 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 502 vhost->action = action; 503 break; 504 case IBMVFC_HOST_ACTION_INIT: 505 case IBMVFC_HOST_ACTION_TGT_DEL: 506 switch (vhost->action) { 507 case IBMVFC_HOST_ACTION_RESET: 508 case IBMVFC_HOST_ACTION_REENABLE: 509 break; 510 default: 511 vhost->action = action; 512 break; 513 }; 514 break; 515 case IBMVFC_HOST_ACTION_LOGO: 516 case IBMVFC_HOST_ACTION_QUERY_TGTS: 517 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 518 case IBMVFC_HOST_ACTION_NONE: 519 case IBMVFC_HOST_ACTION_RESET: 520 case IBMVFC_HOST_ACTION_REENABLE: 521 default: 522 vhost->action = action; 523 break; 524 }; 525 } 526 527 /** 528 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 529 * @vhost: ibmvfc host struct 530 * 531 * Return value: 532 * nothing 533 **/ 534 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 535 { 536 if (vhost->action == IBMVFC_HOST_ACTION_NONE) { 537 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 538 scsi_block_requests(vhost->host); 539 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 540 } 541 } else 542 vhost->reinit = 1; 543 544 wake_up(&vhost->work_wait_q); 545 } 546 547 /** 548 * ibmvfc_link_down - Handle a link down event from the adapter 549 * @vhost: ibmvfc host struct 550 * @state: ibmvfc host state to enter 551 * 552 **/ 553 static void ibmvfc_link_down(struct ibmvfc_host *vhost, 554 enum ibmvfc_host_state state) 555 { 556 struct ibmvfc_target *tgt; 557 558 ENTER; 559 scsi_block_requests(vhost->host); 560 list_for_each_entry(tgt, &vhost->targets, queue) 561 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 562 ibmvfc_set_host_state(vhost, state); 563 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 564 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 565 wake_up(&vhost->work_wait_q); 566 LEAVE; 567 } 568 569 /** 570 * ibmvfc_init_host - Start host initialization 571 * @vhost: ibmvfc host struct 572 * 573 * Return value: 574 * nothing 575 **/ 576 static void ibmvfc_init_host(struct ibmvfc_host *vhost) 577 { 578 struct ibmvfc_target *tgt; 579 580 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 581 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 582 dev_err(vhost->dev, 583 "Host initialization retries exceeded. Taking adapter offline\n"); 584 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 585 return; 586 } 587 } 588 589 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 590 memset(vhost->async_crq.msgs, 0, PAGE_SIZE); 591 vhost->async_crq.cur = 0; 592 593 list_for_each_entry(tgt, &vhost->targets, queue) 594 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 595 scsi_block_requests(vhost->host); 596 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 597 vhost->job_step = ibmvfc_npiv_login; 598 wake_up(&vhost->work_wait_q); 599 } 600 } 601 602 /** 603 * ibmvfc_send_crq - Send a CRQ 604 * @vhost: ibmvfc host struct 605 * @word1: the first 64 bits of the data 606 * @word2: the second 64 bits of the data 607 * 608 * Return value: 609 * 0 on success / other on failure 610 **/ 611 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 612 { 613 struct vio_dev *vdev = to_vio_dev(vhost->dev); 614 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 615 } 616 617 /** 618 * ibmvfc_send_crq_init - Send a CRQ init message 619 * @vhost: ibmvfc host struct 620 * 621 * Return value: 622 * 0 on success / other on failure 623 **/ 624 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 625 { 626 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 627 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 628 } 629 630 /** 631 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 632 * @vhost: ibmvfc host struct 633 * 634 * Return value: 635 * 0 on success / other on failure 636 **/ 637 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 638 { 639 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 640 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 641 } 642 643 /** 644 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 645 * @vhost: ibmvfc host struct 646 * 647 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 648 * the crq with the hypervisor. 649 **/ 650 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 651 { 652 long rc = 0; 653 struct vio_dev *vdev = to_vio_dev(vhost->dev); 654 struct ibmvfc_crq_queue *crq = &vhost->crq; 655 656 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 657 free_irq(vdev->irq, vhost); 658 tasklet_kill(&vhost->tasklet); 659 do { 660 if (rc) 661 msleep(100); 662 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 663 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 664 665 vhost->state = IBMVFC_NO_CRQ; 666 vhost->logged_in = 0; 667 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 668 free_page((unsigned long)crq->msgs); 669 } 670 671 /** 672 * ibmvfc_reenable_crq_queue - reenables the CRQ 673 * @vhost: ibmvfc host struct 674 * 675 * Return value: 676 * 0 on success / other on failure 677 **/ 678 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 679 { 680 int rc = 0; 681 struct vio_dev *vdev = to_vio_dev(vhost->dev); 682 683 /* Re-enable the CRQ */ 684 do { 685 if (rc) 686 msleep(100); 687 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 688 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 689 690 if (rc) 691 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 692 693 return rc; 694 } 695 696 /** 697 * ibmvfc_reset_crq - resets a crq after a failure 698 * @vhost: ibmvfc host struct 699 * 700 * Return value: 701 * 0 on success / other on failure 702 **/ 703 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 704 { 705 int rc = 0; 706 unsigned long flags; 707 struct vio_dev *vdev = to_vio_dev(vhost->dev); 708 struct ibmvfc_crq_queue *crq = &vhost->crq; 709 710 /* Close the CRQ */ 711 do { 712 if (rc) 713 msleep(100); 714 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 715 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 716 717 spin_lock_irqsave(vhost->host->host_lock, flags); 718 vhost->state = IBMVFC_NO_CRQ; 719 vhost->logged_in = 0; 720 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 721 722 /* Clean out the queue */ 723 memset(crq->msgs, 0, PAGE_SIZE); 724 crq->cur = 0; 725 726 /* And re-open it again */ 727 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 728 crq->msg_token, PAGE_SIZE); 729 730 if (rc == H_CLOSED) 731 /* Adapter is good, but other end is not ready */ 732 dev_warn(vhost->dev, "Partner adapter not ready\n"); 733 else if (rc != 0) 734 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 735 spin_unlock_irqrestore(vhost->host->host_lock, flags); 736 737 return rc; 738 } 739 740 /** 741 * ibmvfc_valid_event - Determines if event is valid. 742 * @pool: event_pool that contains the event 743 * @evt: ibmvfc event to be checked for validity 744 * 745 * Return value: 746 * 1 if event is valid / 0 if event is not valid 747 **/ 748 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 749 struct ibmvfc_event *evt) 750 { 751 int index = evt - pool->events; 752 if (index < 0 || index >= pool->size) /* outside of bounds */ 753 return 0; 754 if (evt != pool->events + index) /* unaligned */ 755 return 0; 756 return 1; 757 } 758 759 /** 760 * ibmvfc_free_event - Free the specified event 761 * @evt: ibmvfc_event to be freed 762 * 763 **/ 764 static void ibmvfc_free_event(struct ibmvfc_event *evt) 765 { 766 struct ibmvfc_host *vhost = evt->vhost; 767 struct ibmvfc_event_pool *pool = &vhost->pool; 768 769 BUG_ON(!ibmvfc_valid_event(pool, evt)); 770 BUG_ON(atomic_inc_return(&evt->free) != 1); 771 list_add_tail(&evt->queue, &vhost->free); 772 } 773 774 /** 775 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 776 * @evt: ibmvfc event struct 777 * 778 * This function does not setup any error status, that must be done 779 * before this function gets called. 780 **/ 781 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 782 { 783 struct scsi_cmnd *cmnd = evt->cmnd; 784 785 if (cmnd) { 786 scsi_dma_unmap(cmnd); 787 cmnd->scsi_done(cmnd); 788 } 789 790 if (evt->eh_comp) 791 complete(evt->eh_comp); 792 793 ibmvfc_free_event(evt); 794 } 795 796 /** 797 * ibmvfc_fail_request - Fail request with specified error code 798 * @evt: ibmvfc event struct 799 * @error_code: error code to fail request with 800 * 801 * Return value: 802 * none 803 **/ 804 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 805 { 806 if (evt->cmnd) { 807 evt->cmnd->result = (error_code << 16); 808 evt->done = ibmvfc_scsi_eh_done; 809 } else 810 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED); 811 812 list_del(&evt->queue); 813 del_timer(&evt->timer); 814 ibmvfc_trc_end(evt); 815 evt->done(evt); 816 } 817 818 /** 819 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 820 * @vhost: ibmvfc host struct 821 * @error_code: error code to fail requests with 822 * 823 * Return value: 824 * none 825 **/ 826 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 827 { 828 struct ibmvfc_event *evt, *pos; 829 830 ibmvfc_dbg(vhost, "Purging all requests\n"); 831 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 832 ibmvfc_fail_request(evt, error_code); 833 } 834 835 /** 836 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 837 * @vhost: struct ibmvfc host to reset 838 **/ 839 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 840 { 841 ibmvfc_purge_requests(vhost, DID_ERROR); 842 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 843 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 844 } 845 846 /** 847 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 848 * @vhost: struct ibmvfc host to reset 849 **/ 850 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 851 { 852 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 853 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 854 scsi_block_requests(vhost->host); 855 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 856 vhost->job_step = ibmvfc_npiv_logout; 857 wake_up(&vhost->work_wait_q); 858 } else 859 ibmvfc_hard_reset_host(vhost); 860 } 861 862 /** 863 * ibmvfc_reset_host - Reset the connection to the server 864 * @vhost: ibmvfc host struct 865 **/ 866 static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 867 { 868 unsigned long flags; 869 870 spin_lock_irqsave(vhost->host->host_lock, flags); 871 __ibmvfc_reset_host(vhost); 872 spin_unlock_irqrestore(vhost->host->host_lock, flags); 873 } 874 875 /** 876 * ibmvfc_retry_host_init - Retry host initialization if allowed 877 * @vhost: ibmvfc host struct 878 * 879 * Returns: 1 if init will be retried / 0 if not 880 * 881 **/ 882 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 883 { 884 int retry = 0; 885 886 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 887 vhost->delay_init = 1; 888 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 889 dev_err(vhost->dev, 890 "Host initialization retries exceeded. Taking adapter offline\n"); 891 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 892 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 893 __ibmvfc_reset_host(vhost); 894 else { 895 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 896 retry = 1; 897 } 898 } 899 900 wake_up(&vhost->work_wait_q); 901 return retry; 902 } 903 904 /** 905 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 906 * @starget: scsi target struct 907 * 908 * Return value: 909 * ibmvfc_target struct / NULL if not found 910 **/ 911 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 912 { 913 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 914 struct ibmvfc_host *vhost = shost_priv(shost); 915 struct ibmvfc_target *tgt; 916 917 list_for_each_entry(tgt, &vhost->targets, queue) 918 if (tgt->target_id == starget->id) { 919 kref_get(&tgt->kref); 920 return tgt; 921 } 922 return NULL; 923 } 924 925 /** 926 * ibmvfc_get_target - Find the specified scsi_target 927 * @starget: scsi target struct 928 * 929 * Return value: 930 * ibmvfc_target struct / NULL if not found 931 **/ 932 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 933 { 934 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 935 struct ibmvfc_target *tgt; 936 unsigned long flags; 937 938 spin_lock_irqsave(shost->host_lock, flags); 939 tgt = __ibmvfc_get_target(starget); 940 spin_unlock_irqrestore(shost->host_lock, flags); 941 return tgt; 942 } 943 944 /** 945 * ibmvfc_get_host_speed - Get host port speed 946 * @shost: scsi host struct 947 * 948 * Return value: 949 * none 950 **/ 951 static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 952 { 953 struct ibmvfc_host *vhost = shost_priv(shost); 954 unsigned long flags; 955 956 spin_lock_irqsave(shost->host_lock, flags); 957 if (vhost->state == IBMVFC_ACTIVE) { 958 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) { 959 case 1: 960 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 961 break; 962 case 2: 963 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 964 break; 965 case 4: 966 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 967 break; 968 case 8: 969 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 970 break; 971 case 10: 972 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 973 break; 974 case 16: 975 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 976 break; 977 default: 978 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 979 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100); 980 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 981 break; 982 } 983 } else 984 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 985 spin_unlock_irqrestore(shost->host_lock, flags); 986 } 987 988 /** 989 * ibmvfc_get_host_port_state - Get host port state 990 * @shost: scsi host struct 991 * 992 * Return value: 993 * none 994 **/ 995 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 996 { 997 struct ibmvfc_host *vhost = shost_priv(shost); 998 unsigned long flags; 999 1000 spin_lock_irqsave(shost->host_lock, flags); 1001 switch (vhost->state) { 1002 case IBMVFC_INITIALIZING: 1003 case IBMVFC_ACTIVE: 1004 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 1005 break; 1006 case IBMVFC_LINK_DOWN: 1007 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 1008 break; 1009 case IBMVFC_LINK_DEAD: 1010 case IBMVFC_HOST_OFFLINE: 1011 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1012 break; 1013 case IBMVFC_HALTED: 1014 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1015 break; 1016 case IBMVFC_NO_CRQ: 1017 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1018 break; 1019 default: 1020 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1021 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1022 break; 1023 } 1024 spin_unlock_irqrestore(shost->host_lock, flags); 1025 } 1026 1027 /** 1028 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1029 * @rport: rport struct 1030 * @timeout: timeout value 1031 * 1032 * Return value: 1033 * none 1034 **/ 1035 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1036 { 1037 if (timeout) 1038 rport->dev_loss_tmo = timeout; 1039 else 1040 rport->dev_loss_tmo = 1; 1041 } 1042 1043 /** 1044 * ibmvfc_release_tgt - Free memory allocated for a target 1045 * @kref: kref struct 1046 * 1047 **/ 1048 static void ibmvfc_release_tgt(struct kref *kref) 1049 { 1050 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1051 kfree(tgt); 1052 } 1053 1054 /** 1055 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1056 * @starget: scsi target struct 1057 * 1058 * Return value: 1059 * none 1060 **/ 1061 static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1062 { 1063 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1064 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1065 if (tgt) 1066 kref_put(&tgt->kref, ibmvfc_release_tgt); 1067 } 1068 1069 /** 1070 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1071 * @starget: scsi target struct 1072 * 1073 * Return value: 1074 * none 1075 **/ 1076 static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1077 { 1078 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1079 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1080 if (tgt) 1081 kref_put(&tgt->kref, ibmvfc_release_tgt); 1082 } 1083 1084 /** 1085 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1086 * @starget: scsi target struct 1087 * 1088 * Return value: 1089 * none 1090 **/ 1091 static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1092 { 1093 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1094 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1095 if (tgt) 1096 kref_put(&tgt->kref, ibmvfc_release_tgt); 1097 } 1098 1099 /** 1100 * ibmvfc_wait_while_resetting - Wait while the host resets 1101 * @vhost: ibmvfc host struct 1102 * 1103 * Return value: 1104 * 0 on success / other on failure 1105 **/ 1106 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1107 { 1108 long timeout = wait_event_timeout(vhost->init_wait_q, 1109 ((vhost->state == IBMVFC_ACTIVE || 1110 vhost->state == IBMVFC_HOST_OFFLINE || 1111 vhost->state == IBMVFC_LINK_DEAD) && 1112 vhost->action == IBMVFC_HOST_ACTION_NONE), 1113 (init_timeout * HZ)); 1114 1115 return timeout ? 0 : -EIO; 1116 } 1117 1118 /** 1119 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1120 * @shost: scsi host struct 1121 * 1122 * Return value: 1123 * 0 on success / other on failure 1124 **/ 1125 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1126 { 1127 struct ibmvfc_host *vhost = shost_priv(shost); 1128 1129 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1130 ibmvfc_reset_host(vhost); 1131 return ibmvfc_wait_while_resetting(vhost); 1132 } 1133 1134 /** 1135 * ibmvfc_gather_partition_info - Gather info about the LPAR 1136 * 1137 * Return value: 1138 * none 1139 **/ 1140 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1141 { 1142 struct device_node *rootdn; 1143 const char *name; 1144 const unsigned int *num; 1145 1146 rootdn = of_find_node_by_path("/"); 1147 if (!rootdn) 1148 return; 1149 1150 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1151 if (name) 1152 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1153 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1154 if (num) 1155 vhost->partition_number = *num; 1156 of_node_put(rootdn); 1157 } 1158 1159 /** 1160 * ibmvfc_set_login_info - Setup info for NPIV login 1161 * @vhost: ibmvfc host struct 1162 * 1163 * Return value: 1164 * none 1165 **/ 1166 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1167 { 1168 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1169 struct device_node *of_node = vhost->dev->of_node; 1170 const char *location; 1171 1172 memset(login_info, 0, sizeof(*login_info)); 1173 1174 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX); 1175 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); 1176 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); 1177 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); 1178 login_info->partition_num = cpu_to_be32(vhost->partition_number); 1179 login_info->vfc_frame_version = cpu_to_be32(1); 1180 login_info->fcp_version = cpu_to_be16(3); 1181 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); 1182 if (vhost->client_migrated) 1183 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); 1184 1185 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ); 1186 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE); 1187 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); 1188 login_info->async.len = cpu_to_be32(vhost->async_crq.size * sizeof(*vhost->async_crq.msgs)); 1189 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1190 strncpy(login_info->device_name, 1191 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1192 1193 location = of_get_property(of_node, "ibm,loc-code", NULL); 1194 location = location ? location : dev_name(vhost->dev); 1195 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1196 } 1197 1198 /** 1199 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1200 * @vhost: ibmvfc host who owns the event pool 1201 * 1202 * Returns zero on success. 1203 **/ 1204 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1205 { 1206 int i; 1207 struct ibmvfc_event_pool *pool = &vhost->pool; 1208 1209 ENTER; 1210 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1211 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1212 if (!pool->events) 1213 return -ENOMEM; 1214 1215 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1216 pool->size * sizeof(*pool->iu_storage), 1217 &pool->iu_token, 0); 1218 1219 if (!pool->iu_storage) { 1220 kfree(pool->events); 1221 return -ENOMEM; 1222 } 1223 1224 for (i = 0; i < pool->size; ++i) { 1225 struct ibmvfc_event *evt = &pool->events[i]; 1226 atomic_set(&evt->free, 1); 1227 evt->crq.valid = 0x80; 1228 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i)); 1229 evt->xfer_iu = pool->iu_storage + i; 1230 evt->vhost = vhost; 1231 evt->ext_list = NULL; 1232 list_add_tail(&evt->queue, &vhost->free); 1233 } 1234 1235 LEAVE; 1236 return 0; 1237 } 1238 1239 /** 1240 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1241 * @vhost: ibmvfc host who owns the event pool 1242 * 1243 **/ 1244 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1245 { 1246 int i; 1247 struct ibmvfc_event_pool *pool = &vhost->pool; 1248 1249 ENTER; 1250 for (i = 0; i < pool->size; ++i) { 1251 list_del(&pool->events[i].queue); 1252 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1253 if (pool->events[i].ext_list) 1254 dma_pool_free(vhost->sg_pool, 1255 pool->events[i].ext_list, 1256 pool->events[i].ext_list_token); 1257 } 1258 1259 kfree(pool->events); 1260 dma_free_coherent(vhost->dev, 1261 pool->size * sizeof(*pool->iu_storage), 1262 pool->iu_storage, pool->iu_token); 1263 LEAVE; 1264 } 1265 1266 /** 1267 * ibmvfc_get_event - Gets the next free event in pool 1268 * @vhost: ibmvfc host struct 1269 * 1270 * Returns a free event from the pool. 1271 **/ 1272 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1273 { 1274 struct ibmvfc_event *evt; 1275 1276 BUG_ON(list_empty(&vhost->free)); 1277 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1278 atomic_set(&evt->free, 0); 1279 list_del(&evt->queue); 1280 return evt; 1281 } 1282 1283 /** 1284 * ibmvfc_init_event - Initialize fields in an event struct that are always 1285 * required. 1286 * @evt: The event 1287 * @done: Routine to call when the event is responded to 1288 * @format: SRP or MAD format 1289 **/ 1290 static void ibmvfc_init_event(struct ibmvfc_event *evt, 1291 void (*done) (struct ibmvfc_event *), u8 format) 1292 { 1293 evt->cmnd = NULL; 1294 evt->sync_iu = NULL; 1295 evt->crq.format = format; 1296 evt->done = done; 1297 evt->eh_comp = NULL; 1298 } 1299 1300 /** 1301 * ibmvfc_map_sg_list - Initialize scatterlist 1302 * @scmd: scsi command struct 1303 * @nseg: number of scatterlist segments 1304 * @md: memory descriptor list to initialize 1305 **/ 1306 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1307 struct srp_direct_buf *md) 1308 { 1309 int i; 1310 struct scatterlist *sg; 1311 1312 scsi_for_each_sg(scmd, sg, nseg, i) { 1313 md[i].va = cpu_to_be64(sg_dma_address(sg)); 1314 md[i].len = cpu_to_be32(sg_dma_len(sg)); 1315 md[i].key = 0; 1316 } 1317 } 1318 1319 /** 1320 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1321 * @scmd: Scsi_Cmnd with the scatterlist 1322 * @evt: ibmvfc event struct 1323 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1324 * @dev: device for which to map dma memory 1325 * 1326 * Returns: 1327 * 0 on success / non-zero on failure 1328 **/ 1329 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1330 struct ibmvfc_event *evt, 1331 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1332 { 1333 1334 int sg_mapped; 1335 struct srp_direct_buf *data = &vfc_cmd->ioba; 1336 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1337 1338 sg_mapped = scsi_dma_map(scmd); 1339 if (!sg_mapped) { 1340 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC); 1341 return 0; 1342 } else if (unlikely(sg_mapped < 0)) { 1343 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1344 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1345 return sg_mapped; 1346 } 1347 1348 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1349 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE); 1350 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1351 } else { 1352 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ); 1353 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1354 } 1355 1356 if (sg_mapped == 1) { 1357 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1358 return 0; 1359 } 1360 1361 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST); 1362 1363 if (!evt->ext_list) { 1364 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1365 &evt->ext_list_token); 1366 1367 if (!evt->ext_list) { 1368 scsi_dma_unmap(scmd); 1369 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1370 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1371 return -ENOMEM; 1372 } 1373 } 1374 1375 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1376 1377 data->va = cpu_to_be64(evt->ext_list_token); 1378 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf)); 1379 data->key = 0; 1380 return 0; 1381 } 1382 1383 /** 1384 * ibmvfc_timeout - Internal command timeout handler 1385 * @evt: struct ibmvfc_event that timed out 1386 * 1387 * Called when an internally generated command times out 1388 **/ 1389 static void ibmvfc_timeout(struct ibmvfc_event *evt) 1390 { 1391 struct ibmvfc_host *vhost = evt->vhost; 1392 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1393 ibmvfc_reset_host(vhost); 1394 } 1395 1396 /** 1397 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1398 * @evt: event to be sent 1399 * @vhost: ibmvfc host struct 1400 * @timeout: timeout in seconds - 0 means do not time command 1401 * 1402 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1403 **/ 1404 static int ibmvfc_send_event(struct ibmvfc_event *evt, 1405 struct ibmvfc_host *vhost, unsigned long timeout) 1406 { 1407 __be64 *crq_as_u64 = (__be64 *) &evt->crq; 1408 int rc; 1409 1410 /* Copy the IU into the transfer area */ 1411 *evt->xfer_iu = evt->iu; 1412 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1413 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); 1414 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1415 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); 1416 else 1417 BUG(); 1418 1419 list_add_tail(&evt->queue, &vhost->sent); 1420 init_timer(&evt->timer); 1421 1422 if (timeout) { 1423 evt->timer.data = (unsigned long) evt; 1424 evt->timer.expires = jiffies + (timeout * HZ); 1425 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; 1426 add_timer(&evt->timer); 1427 } 1428 1429 mb(); 1430 1431 if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), 1432 be64_to_cpu(crq_as_u64[1])))) { 1433 list_del(&evt->queue); 1434 del_timer(&evt->timer); 1435 1436 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1437 * Firmware will send a CRQ with a transport event (0xFF) to 1438 * tell this client what has happened to the transport. This 1439 * will be handled in ibmvfc_handle_crq() 1440 */ 1441 if (rc == H_CLOSED) { 1442 if (printk_ratelimit()) 1443 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1444 if (evt->cmnd) 1445 scsi_dma_unmap(evt->cmnd); 1446 ibmvfc_free_event(evt); 1447 return SCSI_MLQUEUE_HOST_BUSY; 1448 } 1449 1450 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1451 if (evt->cmnd) { 1452 evt->cmnd->result = DID_ERROR << 16; 1453 evt->done = ibmvfc_scsi_eh_done; 1454 } else 1455 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); 1456 1457 evt->done(evt); 1458 } else 1459 ibmvfc_trc_start(evt); 1460 1461 return 0; 1462 } 1463 1464 /** 1465 * ibmvfc_log_error - Log an error for the failed command if appropriate 1466 * @evt: ibmvfc event to log 1467 * 1468 **/ 1469 static void ibmvfc_log_error(struct ibmvfc_event *evt) 1470 { 1471 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1472 struct ibmvfc_host *vhost = evt->vhost; 1473 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1474 struct scsi_cmnd *cmnd = evt->cmnd; 1475 const char *err = unknown_error; 1476 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 1477 int logerr = 0; 1478 int rsp_code = 0; 1479 1480 if (index >= 0) { 1481 logerr = cmd_status[index].log; 1482 err = cmd_status[index].name; 1483 } 1484 1485 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1486 return; 1487 1488 if (rsp->flags & FCP_RSP_LEN_VALID) 1489 rsp_code = rsp->data.info.rsp_code; 1490 1491 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1492 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1493 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1494 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1495 } 1496 1497 /** 1498 * ibmvfc_relogin - Log back into the specified device 1499 * @sdev: scsi device struct 1500 * 1501 **/ 1502 static void ibmvfc_relogin(struct scsi_device *sdev) 1503 { 1504 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1505 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1506 struct ibmvfc_target *tgt; 1507 1508 list_for_each_entry(tgt, &vhost->targets, queue) { 1509 if (rport == tgt->rport) { 1510 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 1511 break; 1512 } 1513 } 1514 1515 ibmvfc_reinit_host(vhost); 1516 } 1517 1518 /** 1519 * ibmvfc_scsi_done - Handle responses from commands 1520 * @evt: ibmvfc event to be handled 1521 * 1522 * Used as a callback when sending scsi cmds. 1523 **/ 1524 static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1525 { 1526 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1527 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1528 struct scsi_cmnd *cmnd = evt->cmnd; 1529 u32 rsp_len = 0; 1530 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); 1531 1532 if (cmnd) { 1533 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) 1534 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); 1535 else if (rsp->flags & FCP_RESID_UNDER) 1536 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); 1537 else 1538 scsi_set_resid(cmnd, 0); 1539 1540 if (vfc_cmd->status) { 1541 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1542 1543 if (rsp->flags & FCP_RSP_LEN_VALID) 1544 rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 1545 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1546 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1547 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1548 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1549 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && 1550 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) 1551 ibmvfc_relogin(cmnd->device); 1552 1553 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1554 cmnd->result = (DID_ERROR << 16); 1555 1556 ibmvfc_log_error(evt); 1557 } 1558 1559 if (!cmnd->result && 1560 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1561 cmnd->result = (DID_ERROR << 16); 1562 1563 scsi_dma_unmap(cmnd); 1564 cmnd->scsi_done(cmnd); 1565 } 1566 1567 if (evt->eh_comp) 1568 complete(evt->eh_comp); 1569 1570 ibmvfc_free_event(evt); 1571 } 1572 1573 /** 1574 * ibmvfc_host_chkready - Check if the host can accept commands 1575 * @vhost: struct ibmvfc host 1576 * 1577 * Returns: 1578 * 1 if host can accept command / 0 if not 1579 **/ 1580 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1581 { 1582 int result = 0; 1583 1584 switch (vhost->state) { 1585 case IBMVFC_LINK_DEAD: 1586 case IBMVFC_HOST_OFFLINE: 1587 result = DID_NO_CONNECT << 16; 1588 break; 1589 case IBMVFC_NO_CRQ: 1590 case IBMVFC_INITIALIZING: 1591 case IBMVFC_HALTED: 1592 case IBMVFC_LINK_DOWN: 1593 result = DID_REQUEUE << 16; 1594 break; 1595 case IBMVFC_ACTIVE: 1596 result = 0; 1597 break; 1598 }; 1599 1600 return result; 1601 } 1602 1603 /** 1604 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1605 * @cmnd: struct scsi_cmnd to be executed 1606 * @done: Callback function to be called when cmnd is completed 1607 * 1608 * Returns: 1609 * 0 on success / other on failure 1610 **/ 1611 static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd, 1612 void (*done) (struct scsi_cmnd *)) 1613 { 1614 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1615 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1616 struct ibmvfc_cmd *vfc_cmd; 1617 struct ibmvfc_event *evt; 1618 u8 tag[2]; 1619 int rc; 1620 1621 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1622 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1623 cmnd->result = rc; 1624 done(cmnd); 1625 return 0; 1626 } 1627 1628 cmnd->result = (DID_OK << 16); 1629 evt = ibmvfc_get_event(vhost); 1630 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1631 evt->cmnd = cmnd; 1632 cmnd->scsi_done = done; 1633 vfc_cmd = &evt->iu.cmd; 1634 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1635 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 1636 vfc_cmd->resp.len = cpu_to_be32(sizeof(vfc_cmd->rsp)); 1637 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1638 vfc_cmd->payload_len = cpu_to_be32(sizeof(vfc_cmd->iu)); 1639 vfc_cmd->resp_len = cpu_to_be32(sizeof(vfc_cmd->rsp)); 1640 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)cmnd->device->hostdata); 1641 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); 1642 vfc_cmd->iu.xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); 1643 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1644 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1645 1646 if (scsi_populate_tag_msg(cmnd, tag)) { 1647 vfc_cmd->task_tag = cpu_to_be64(tag[1]); 1648 switch (tag[0]) { 1649 case MSG_SIMPLE_TAG: 1650 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1651 break; 1652 case MSG_HEAD_TAG: 1653 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; 1654 break; 1655 case MSG_ORDERED_TAG: 1656 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; 1657 break; 1658 }; 1659 } 1660 1661 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1662 return ibmvfc_send_event(evt, vhost, 0); 1663 1664 ibmvfc_free_event(evt); 1665 if (rc == -ENOMEM) 1666 return SCSI_MLQUEUE_HOST_BUSY; 1667 1668 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1669 scmd_printk(KERN_ERR, cmnd, 1670 "Failed to map DMA buffer for command. rc=%d\n", rc); 1671 1672 cmnd->result = DID_ERROR << 16; 1673 done(cmnd); 1674 return 0; 1675 } 1676 1677 static DEF_SCSI_QCMD(ibmvfc_queuecommand) 1678 1679 /** 1680 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1681 * @evt: ibmvfc event struct 1682 * 1683 **/ 1684 static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1685 { 1686 /* copy the response back */ 1687 if (evt->sync_iu) 1688 *evt->sync_iu = *evt->xfer_iu; 1689 1690 complete(&evt->comp); 1691 } 1692 1693 /** 1694 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 1695 * @evt: struct ibmvfc_event 1696 * 1697 **/ 1698 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 1699 { 1700 struct ibmvfc_host *vhost = evt->vhost; 1701 1702 ibmvfc_free_event(evt); 1703 vhost->aborting_passthru = 0; 1704 dev_info(vhost->dev, "Passthru command cancelled\n"); 1705 } 1706 1707 /** 1708 * ibmvfc_bsg_timeout - Handle a BSG timeout 1709 * @job: struct fc_bsg_job that timed out 1710 * 1711 * Returns: 1712 * 0 on success / other on failure 1713 **/ 1714 static int ibmvfc_bsg_timeout(struct fc_bsg_job *job) 1715 { 1716 struct ibmvfc_host *vhost = shost_priv(job->shost); 1717 unsigned long port_id = (unsigned long)job->dd_data; 1718 struct ibmvfc_event *evt; 1719 struct ibmvfc_tmf *tmf; 1720 unsigned long flags; 1721 int rc; 1722 1723 ENTER; 1724 spin_lock_irqsave(vhost->host->host_lock, flags); 1725 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 1726 __ibmvfc_reset_host(vhost); 1727 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1728 return 0; 1729 } 1730 1731 vhost->aborting_passthru = 1; 1732 evt = ibmvfc_get_event(vhost); 1733 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 1734 1735 tmf = &evt->iu.tmf; 1736 memset(tmf, 0, sizeof(*tmf)); 1737 tmf->common.version = cpu_to_be32(1); 1738 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 1739 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 1740 tmf->scsi_id = cpu_to_be64(port_id); 1741 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 1742 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); 1743 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1744 1745 if (rc != 0) { 1746 vhost->aborting_passthru = 0; 1747 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 1748 rc = -EIO; 1749 } else 1750 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 1751 port_id); 1752 1753 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1754 1755 LEAVE; 1756 return rc; 1757 } 1758 1759 /** 1760 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 1761 * @vhost: struct ibmvfc_host to send command 1762 * @port_id: port ID to send command 1763 * 1764 * Returns: 1765 * 0 on success / other on failure 1766 **/ 1767 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 1768 { 1769 struct ibmvfc_port_login *plogi; 1770 struct ibmvfc_target *tgt; 1771 struct ibmvfc_event *evt; 1772 union ibmvfc_iu rsp_iu; 1773 unsigned long flags; 1774 int rc = 0, issue_login = 1; 1775 1776 ENTER; 1777 spin_lock_irqsave(vhost->host->host_lock, flags); 1778 list_for_each_entry(tgt, &vhost->targets, queue) { 1779 if (tgt->scsi_id == port_id) { 1780 issue_login = 0; 1781 break; 1782 } 1783 } 1784 1785 if (!issue_login) 1786 goto unlock_out; 1787 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 1788 goto unlock_out; 1789 1790 evt = ibmvfc_get_event(vhost); 1791 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1792 plogi = &evt->iu.plogi; 1793 memset(plogi, 0, sizeof(*plogi)); 1794 plogi->common.version = cpu_to_be32(1); 1795 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 1796 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 1797 plogi->scsi_id = cpu_to_be64(port_id); 1798 evt->sync_iu = &rsp_iu; 1799 init_completion(&evt->comp); 1800 1801 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1802 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1803 1804 if (rc) 1805 return -EIO; 1806 1807 wait_for_completion(&evt->comp); 1808 1809 if (rsp_iu.plogi.common.status) 1810 rc = -EIO; 1811 1812 spin_lock_irqsave(vhost->host->host_lock, flags); 1813 ibmvfc_free_event(evt); 1814 unlock_out: 1815 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1816 LEAVE; 1817 return rc; 1818 } 1819 1820 /** 1821 * ibmvfc_bsg_request - Handle a BSG request 1822 * @job: struct fc_bsg_job to be executed 1823 * 1824 * Returns: 1825 * 0 on success / other on failure 1826 **/ 1827 static int ibmvfc_bsg_request(struct fc_bsg_job *job) 1828 { 1829 struct ibmvfc_host *vhost = shost_priv(job->shost); 1830 struct fc_rport *rport = job->rport; 1831 struct ibmvfc_passthru_mad *mad; 1832 struct ibmvfc_event *evt; 1833 union ibmvfc_iu rsp_iu; 1834 unsigned long flags, port_id = -1; 1835 unsigned int code = job->request->msgcode; 1836 int rc = 0, req_seg, rsp_seg, issue_login = 0; 1837 u32 fc_flags, rsp_len; 1838 1839 ENTER; 1840 job->reply->reply_payload_rcv_len = 0; 1841 if (rport) 1842 port_id = rport->port_id; 1843 1844 switch (code) { 1845 case FC_BSG_HST_ELS_NOLOGIN: 1846 port_id = (job->request->rqst_data.h_els.port_id[0] << 16) | 1847 (job->request->rqst_data.h_els.port_id[1] << 8) | 1848 job->request->rqst_data.h_els.port_id[2]; 1849 case FC_BSG_RPT_ELS: 1850 fc_flags = IBMVFC_FC_ELS; 1851 break; 1852 case FC_BSG_HST_CT: 1853 issue_login = 1; 1854 port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) | 1855 (job->request->rqst_data.h_ct.port_id[1] << 8) | 1856 job->request->rqst_data.h_ct.port_id[2]; 1857 case FC_BSG_RPT_CT: 1858 fc_flags = IBMVFC_FC_CT_IU; 1859 break; 1860 default: 1861 return -ENOTSUPP; 1862 }; 1863 1864 if (port_id == -1) 1865 return -EINVAL; 1866 if (!mutex_trylock(&vhost->passthru_mutex)) 1867 return -EBUSY; 1868 1869 job->dd_data = (void *)port_id; 1870 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 1871 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1872 1873 if (!req_seg) { 1874 mutex_unlock(&vhost->passthru_mutex); 1875 return -ENOMEM; 1876 } 1877 1878 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 1879 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1880 1881 if (!rsp_seg) { 1882 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1883 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1884 mutex_unlock(&vhost->passthru_mutex); 1885 return -ENOMEM; 1886 } 1887 1888 if (req_seg > 1 || rsp_seg > 1) { 1889 rc = -EINVAL; 1890 goto out; 1891 } 1892 1893 if (issue_login) 1894 rc = ibmvfc_bsg_plogi(vhost, port_id); 1895 1896 spin_lock_irqsave(vhost->host->host_lock, flags); 1897 1898 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 1899 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1900 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1901 goto out; 1902 } 1903 1904 evt = ibmvfc_get_event(vhost); 1905 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1906 mad = &evt->iu.passthru; 1907 1908 memset(mad, 0, sizeof(*mad)); 1909 mad->common.version = cpu_to_be32(1); 1910 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 1911 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 1912 1913 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + 1914 offsetof(struct ibmvfc_passthru_mad, iu)); 1915 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 1916 1917 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); 1918 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); 1919 mad->iu.flags = cpu_to_be32(fc_flags); 1920 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 1921 1922 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); 1923 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); 1924 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); 1925 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); 1926 mad->iu.scsi_id = cpu_to_be64(port_id); 1927 mad->iu.tag = cpu_to_be64((u64)evt); 1928 rsp_len = be32_to_cpu(mad->iu.rsp.len); 1929 1930 evt->sync_iu = &rsp_iu; 1931 init_completion(&evt->comp); 1932 rc = ibmvfc_send_event(evt, vhost, 0); 1933 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1934 1935 if (rc) { 1936 rc = -EIO; 1937 goto out; 1938 } 1939 1940 wait_for_completion(&evt->comp); 1941 1942 if (rsp_iu.passthru.common.status) 1943 rc = -EIO; 1944 else 1945 job->reply->reply_payload_rcv_len = rsp_len; 1946 1947 spin_lock_irqsave(vhost->host->host_lock, flags); 1948 ibmvfc_free_event(evt); 1949 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1950 job->reply->result = rc; 1951 job->job_done(job); 1952 rc = 0; 1953 out: 1954 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1955 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1956 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 1957 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1958 mutex_unlock(&vhost->passthru_mutex); 1959 LEAVE; 1960 return rc; 1961 } 1962 1963 /** 1964 * ibmvfc_reset_device - Reset the device with the specified reset type 1965 * @sdev: scsi device to reset 1966 * @type: reset type 1967 * @desc: reset type description for log messages 1968 * 1969 * Returns: 1970 * 0 on success / other on failure 1971 **/ 1972 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1973 { 1974 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1975 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1976 struct ibmvfc_cmd *tmf; 1977 struct ibmvfc_event *evt = NULL; 1978 union ibmvfc_iu rsp_iu; 1979 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1980 int rsp_rc = -EBUSY; 1981 unsigned long flags; 1982 int rsp_code = 0; 1983 1984 spin_lock_irqsave(vhost->host->host_lock, flags); 1985 if (vhost->state == IBMVFC_ACTIVE) { 1986 evt = ibmvfc_get_event(vhost); 1987 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1988 1989 tmf = &evt->iu.cmd; 1990 memset(tmf, 0, sizeof(*tmf)); 1991 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 1992 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); 1993 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1994 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); 1995 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); 1996 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 1997 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); 1998 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1999 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2000 tmf->iu.tmf_flags = type; 2001 evt->sync_iu = &rsp_iu; 2002 2003 init_completion(&evt->comp); 2004 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2005 } 2006 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2007 2008 if (rsp_rc != 0) { 2009 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 2010 desc, rsp_rc); 2011 return -EIO; 2012 } 2013 2014 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2015 wait_for_completion(&evt->comp); 2016 2017 if (rsp_iu.cmd.status) 2018 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2019 2020 if (rsp_code) { 2021 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2022 rsp_code = fc_rsp->data.info.rsp_code; 2023 2024 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2025 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, 2026 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2027 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2028 fc_rsp->scsi_status); 2029 rsp_rc = -EIO; 2030 } else 2031 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2032 2033 spin_lock_irqsave(vhost->host->host_lock, flags); 2034 ibmvfc_free_event(evt); 2035 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2036 return rsp_rc; 2037 } 2038 2039 /** 2040 * ibmvfc_match_rport - Match function for specified remote port 2041 * @evt: ibmvfc event struct 2042 * @device: device to match (rport) 2043 * 2044 * Returns: 2045 * 1 if event matches rport / 0 if event does not match rport 2046 **/ 2047 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2048 { 2049 struct fc_rport *cmd_rport; 2050 2051 if (evt->cmnd) { 2052 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2053 if (cmd_rport == rport) 2054 return 1; 2055 } 2056 return 0; 2057 } 2058 2059 /** 2060 * ibmvfc_match_target - Match function for specified target 2061 * @evt: ibmvfc event struct 2062 * @device: device to match (starget) 2063 * 2064 * Returns: 2065 * 1 if event matches starget / 0 if event does not match starget 2066 **/ 2067 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2068 { 2069 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2070 return 1; 2071 return 0; 2072 } 2073 2074 /** 2075 * ibmvfc_match_lun - Match function for specified LUN 2076 * @evt: ibmvfc event struct 2077 * @device: device to match (sdev) 2078 * 2079 * Returns: 2080 * 1 if event matches sdev / 0 if event does not match sdev 2081 **/ 2082 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2083 { 2084 if (evt->cmnd && evt->cmnd->device == device) 2085 return 1; 2086 return 0; 2087 } 2088 2089 /** 2090 * ibmvfc_wait_for_ops - Wait for ops to complete 2091 * @vhost: ibmvfc host struct 2092 * @device: device to match (starget or sdev) 2093 * @match: match function 2094 * 2095 * Returns: 2096 * SUCCESS / FAILED 2097 **/ 2098 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2099 int (*match) (struct ibmvfc_event *, void *)) 2100 { 2101 struct ibmvfc_event *evt; 2102 DECLARE_COMPLETION_ONSTACK(comp); 2103 int wait; 2104 unsigned long flags; 2105 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2106 2107 ENTER; 2108 do { 2109 wait = 0; 2110 spin_lock_irqsave(vhost->host->host_lock, flags); 2111 list_for_each_entry(evt, &vhost->sent, queue) { 2112 if (match(evt, device)) { 2113 evt->eh_comp = ∁ 2114 wait++; 2115 } 2116 } 2117 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2118 2119 if (wait) { 2120 timeout = wait_for_completion_timeout(&comp, timeout); 2121 2122 if (!timeout) { 2123 wait = 0; 2124 spin_lock_irqsave(vhost->host->host_lock, flags); 2125 list_for_each_entry(evt, &vhost->sent, queue) { 2126 if (match(evt, device)) { 2127 evt->eh_comp = NULL; 2128 wait++; 2129 } 2130 } 2131 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2132 if (wait) 2133 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2134 LEAVE; 2135 return wait ? FAILED : SUCCESS; 2136 } 2137 } 2138 } while (wait); 2139 2140 LEAVE; 2141 return SUCCESS; 2142 } 2143 2144 /** 2145 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2146 * @sdev: scsi device to cancel commands 2147 * @type: type of error recovery being performed 2148 * 2149 * This sends a cancel to the VIOS for the specified device. This does 2150 * NOT send any abort to the actual device. That must be done separately. 2151 * 2152 * Returns: 2153 * 0 on success / other on failure 2154 **/ 2155 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2156 { 2157 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2158 struct scsi_target *starget = scsi_target(sdev); 2159 struct fc_rport *rport = starget_to_rport(starget); 2160 struct ibmvfc_tmf *tmf; 2161 struct ibmvfc_event *evt, *found_evt; 2162 union ibmvfc_iu rsp; 2163 int rsp_rc = -EBUSY; 2164 unsigned long flags; 2165 u16 status; 2166 2167 ENTER; 2168 spin_lock_irqsave(vhost->host->host_lock, flags); 2169 found_evt = NULL; 2170 list_for_each_entry(evt, &vhost->sent, queue) { 2171 if (evt->cmnd && evt->cmnd->device == sdev) { 2172 found_evt = evt; 2173 break; 2174 } 2175 } 2176 2177 if (!found_evt) { 2178 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2179 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2180 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2181 return 0; 2182 } 2183 2184 if (vhost->logged_in) { 2185 evt = ibmvfc_get_event(vhost); 2186 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2187 2188 tmf = &evt->iu.tmf; 2189 memset(tmf, 0, sizeof(*tmf)); 2190 tmf->common.version = cpu_to_be32(1); 2191 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2192 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2193 tmf->scsi_id = cpu_to_be64(rport->port_id); 2194 int_to_scsilun(sdev->lun, &tmf->lun); 2195 if (!(be64_to_cpu(vhost->login_buf->resp.capabilities) & IBMVFC_CAN_SUPPRESS_ABTS)) 2196 type &= ~IBMVFC_TMF_SUPPRESS_ABTS; 2197 if (vhost->state == IBMVFC_ACTIVE) 2198 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); 2199 else 2200 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); 2201 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2202 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); 2203 2204 evt->sync_iu = &rsp; 2205 init_completion(&evt->comp); 2206 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2207 } 2208 2209 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2210 2211 if (rsp_rc != 0) { 2212 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2213 /* If failure is received, the host adapter is most likely going 2214 through reset, return success so the caller will wait for the command 2215 being cancelled to get returned */ 2216 return 0; 2217 } 2218 2219 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2220 2221 wait_for_completion(&evt->comp); 2222 status = be16_to_cpu(rsp.mad_common.status); 2223 spin_lock_irqsave(vhost->host->host_lock, flags); 2224 ibmvfc_free_event(evt); 2225 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2226 2227 if (status != IBMVFC_MAD_SUCCESS) { 2228 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2229 switch (status) { 2230 case IBMVFC_MAD_DRIVER_FAILED: 2231 case IBMVFC_MAD_CRQ_ERROR: 2232 /* Host adapter most likely going through reset, return success to 2233 the caller will wait for the command being cancelled to get returned */ 2234 return 0; 2235 default: 2236 return -EIO; 2237 }; 2238 } 2239 2240 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2241 return 0; 2242 } 2243 2244 /** 2245 * ibmvfc_match_key - Match function for specified cancel key 2246 * @evt: ibmvfc event struct 2247 * @key: cancel key to match 2248 * 2249 * Returns: 2250 * 1 if event matches key / 0 if event does not match key 2251 **/ 2252 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2253 { 2254 unsigned long cancel_key = (unsigned long)key; 2255 2256 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2257 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) 2258 return 1; 2259 return 0; 2260 } 2261 2262 /** 2263 * ibmvfc_match_evt - Match function for specified event 2264 * @evt: ibmvfc event struct 2265 * @match: event to match 2266 * 2267 * Returns: 2268 * 1 if event matches key / 0 if event does not match key 2269 **/ 2270 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) 2271 { 2272 if (evt == match) 2273 return 1; 2274 return 0; 2275 } 2276 2277 /** 2278 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2279 * @sdev: scsi device to abort commands 2280 * 2281 * This sends an Abort Task Set to the VIOS for the specified device. This does 2282 * NOT send any cancel to the VIOS. That must be done separately. 2283 * 2284 * Returns: 2285 * 0 on success / other on failure 2286 **/ 2287 static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2288 { 2289 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2290 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2291 struct ibmvfc_cmd *tmf; 2292 struct ibmvfc_event *evt, *found_evt; 2293 union ibmvfc_iu rsp_iu; 2294 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 2295 int rc, rsp_rc = -EBUSY; 2296 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2297 int rsp_code = 0; 2298 2299 spin_lock_irqsave(vhost->host->host_lock, flags); 2300 found_evt = NULL; 2301 list_for_each_entry(evt, &vhost->sent, queue) { 2302 if (evt->cmnd && evt->cmnd->device == sdev) { 2303 found_evt = evt; 2304 break; 2305 } 2306 } 2307 2308 if (!found_evt) { 2309 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2310 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2311 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2312 return 0; 2313 } 2314 2315 if (vhost->state == IBMVFC_ACTIVE) { 2316 evt = ibmvfc_get_event(vhost); 2317 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2318 2319 tmf = &evt->iu.cmd; 2320 memset(tmf, 0, sizeof(*tmf)); 2321 tmf->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_cmd, rsp)); 2322 tmf->resp.len = cpu_to_be32(sizeof(tmf->rsp)); 2323 tmf->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 2324 tmf->payload_len = cpu_to_be32(sizeof(tmf->iu)); 2325 tmf->resp_len = cpu_to_be32(sizeof(tmf->rsp)); 2326 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2327 tmf->tgt_scsi_id = cpu_to_be64(rport->port_id); 2328 int_to_scsilun(sdev->lun, &tmf->iu.lun); 2329 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2330 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 2331 evt->sync_iu = &rsp_iu; 2332 2333 init_completion(&evt->comp); 2334 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2335 } 2336 2337 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2338 2339 if (rsp_rc != 0) { 2340 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2341 return -EIO; 2342 } 2343 2344 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2345 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2346 2347 if (!timeout) { 2348 rc = ibmvfc_cancel_all(sdev, 0); 2349 if (!rc) { 2350 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2351 if (rc == SUCCESS) 2352 rc = 0; 2353 } 2354 2355 if (rc) { 2356 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2357 ibmvfc_reset_host(vhost); 2358 rsp_rc = -EIO; 2359 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2360 2361 if (rc == SUCCESS) 2362 rsp_rc = 0; 2363 2364 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); 2365 if (rc != SUCCESS) { 2366 spin_lock_irqsave(vhost->host->host_lock, flags); 2367 ibmvfc_hard_reset_host(vhost); 2368 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2369 rsp_rc = 0; 2370 } 2371 2372 goto out; 2373 } 2374 } 2375 2376 if (rsp_iu.cmd.status) 2377 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2378 2379 if (rsp_code) { 2380 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2381 rsp_code = fc_rsp->data.info.rsp_code; 2382 2383 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2384 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2385 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2386 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2387 fc_rsp->scsi_status); 2388 rsp_rc = -EIO; 2389 } else 2390 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2391 2392 out: 2393 spin_lock_irqsave(vhost->host->host_lock, flags); 2394 ibmvfc_free_event(evt); 2395 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2396 return rsp_rc; 2397 } 2398 2399 /** 2400 * ibmvfc_eh_abort_handler - Abort a command 2401 * @cmd: scsi command to abort 2402 * 2403 * Returns: 2404 * SUCCESS / FAST_IO_FAIL / FAILED 2405 **/ 2406 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2407 { 2408 struct scsi_device *sdev = cmd->device; 2409 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2410 int cancel_rc, block_rc; 2411 int rc = FAILED; 2412 2413 ENTER; 2414 block_rc = fc_block_scsi_eh(cmd); 2415 ibmvfc_wait_while_resetting(vhost); 2416 if (block_rc != FAST_IO_FAIL) { 2417 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2418 ibmvfc_abort_task_set(sdev); 2419 } else 2420 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2421 2422 if (!cancel_rc) 2423 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2424 2425 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2426 rc = FAST_IO_FAIL; 2427 2428 LEAVE; 2429 return rc; 2430 } 2431 2432 /** 2433 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2434 * @cmd: scsi command struct 2435 * 2436 * Returns: 2437 * SUCCESS / FAST_IO_FAIL / FAILED 2438 **/ 2439 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2440 { 2441 struct scsi_device *sdev = cmd->device; 2442 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2443 int cancel_rc, block_rc, reset_rc = 0; 2444 int rc = FAILED; 2445 2446 ENTER; 2447 block_rc = fc_block_scsi_eh(cmd); 2448 ibmvfc_wait_while_resetting(vhost); 2449 if (block_rc != FAST_IO_FAIL) { 2450 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2451 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2452 } else 2453 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2454 2455 if (!cancel_rc && !reset_rc) 2456 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2457 2458 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2459 rc = FAST_IO_FAIL; 2460 2461 LEAVE; 2462 return rc; 2463 } 2464 2465 /** 2466 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function 2467 * @sdev: scsi device struct 2468 * @data: return code 2469 * 2470 **/ 2471 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) 2472 { 2473 unsigned long *rc = data; 2474 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2475 } 2476 2477 /** 2478 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2479 * @sdev: scsi device struct 2480 * @data: return code 2481 * 2482 **/ 2483 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2484 { 2485 unsigned long *rc = data; 2486 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2487 } 2488 2489 /** 2490 * ibmvfc_eh_target_reset_handler - Reset the target 2491 * @cmd: scsi command struct 2492 * 2493 * Returns: 2494 * SUCCESS / FAST_IO_FAIL / FAILED 2495 **/ 2496 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2497 { 2498 struct scsi_device *sdev = cmd->device; 2499 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2500 struct scsi_target *starget = scsi_target(sdev); 2501 int block_rc; 2502 int reset_rc = 0; 2503 int rc = FAILED; 2504 unsigned long cancel_rc = 0; 2505 2506 ENTER; 2507 block_rc = fc_block_scsi_eh(cmd); 2508 ibmvfc_wait_while_resetting(vhost); 2509 if (block_rc != FAST_IO_FAIL) { 2510 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2511 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2512 } else 2513 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); 2514 2515 if (!cancel_rc && !reset_rc) 2516 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2517 2518 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2519 rc = FAST_IO_FAIL; 2520 2521 LEAVE; 2522 return rc; 2523 } 2524 2525 /** 2526 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2527 * @cmd: struct scsi_cmnd having problems 2528 * 2529 **/ 2530 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2531 { 2532 int rc, block_rc; 2533 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2534 2535 block_rc = fc_block_scsi_eh(cmd); 2536 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2537 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2538 2539 if (block_rc == FAST_IO_FAIL) 2540 return FAST_IO_FAIL; 2541 2542 return rc ? FAILED : SUCCESS; 2543 } 2544 2545 /** 2546 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2547 * @rport: rport struct 2548 * 2549 * Return value: 2550 * none 2551 **/ 2552 static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2553 { 2554 struct Scsi_Host *shost = rport_to_shost(rport); 2555 struct ibmvfc_host *vhost = shost_priv(shost); 2556 struct fc_rport *dev_rport; 2557 struct scsi_device *sdev; 2558 unsigned long rc; 2559 2560 ENTER; 2561 shost_for_each_device(sdev, shost) { 2562 dev_rport = starget_to_rport(scsi_target(sdev)); 2563 if (dev_rport != rport) 2564 continue; 2565 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2566 } 2567 2568 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 2569 2570 if (rc == FAILED) 2571 ibmvfc_issue_fc_host_lip(shost); 2572 LEAVE; 2573 } 2574 2575 static const struct ibmvfc_async_desc ae_desc [] = { 2576 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2577 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2578 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2579 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2580 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2581 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, 2582 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, 2583 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, 2584 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, 2585 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, 2586 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, 2587 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, 2588 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, 2589 }; 2590 2591 static const struct ibmvfc_async_desc unknown_ae = { 2592 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL 2593 }; 2594 2595 /** 2596 * ibmvfc_get_ae_desc - Get text description for async event 2597 * @ae: async event 2598 * 2599 **/ 2600 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 2601 { 2602 int i; 2603 2604 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2605 if (ae_desc[i].ae == ae) 2606 return &ae_desc[i]; 2607 2608 return &unknown_ae; 2609 } 2610 2611 static const struct { 2612 enum ibmvfc_ae_link_state state; 2613 const char *desc; 2614 } link_desc [] = { 2615 { IBMVFC_AE_LS_LINK_UP, " link up" }, 2616 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 2617 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 2618 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 2619 }; 2620 2621 /** 2622 * ibmvfc_get_link_state - Get text description for link state 2623 * @state: link state 2624 * 2625 **/ 2626 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 2627 { 2628 int i; 2629 2630 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 2631 if (link_desc[i].state == state) 2632 return link_desc[i].desc; 2633 2634 return ""; 2635 } 2636 2637 /** 2638 * ibmvfc_handle_async - Handle an async event from the adapter 2639 * @crq: crq to process 2640 * @vhost: ibmvfc host struct 2641 * 2642 **/ 2643 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2644 struct ibmvfc_host *vhost) 2645 { 2646 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); 2647 struct ibmvfc_target *tgt; 2648 2649 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 2650 " node_name: %llx%s\n", desc->desc, crq->scsi_id, crq->wwpn, 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 2901 if (sdev->tagged_supported) { 2902 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 2903 scsi_activate_tcq(sdev, sdev->queue_depth); 2904 } else 2905 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2906 spin_unlock_irqrestore(shost->host_lock, flags); 2907 return 0; 2908 } 2909 2910 /** 2911 * ibmvfc_change_queue_depth - Change the device's queue depth 2912 * @sdev: scsi device struct 2913 * @qdepth: depth to set 2914 * @reason: calling context 2915 * 2916 * Return value: 2917 * actual depth set 2918 **/ 2919 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth, 2920 int reason) 2921 { 2922 if (reason != SCSI_QDEPTH_DEFAULT) 2923 return -EOPNOTSUPP; 2924 2925 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2926 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2927 2928 scsi_adjust_queue_depth(sdev, 0, qdepth); 2929 return sdev->queue_depth; 2930 } 2931 2932 /** 2933 * ibmvfc_change_queue_type - Change the device's queue type 2934 * @sdev: scsi device struct 2935 * @tag_type: type of tags to use 2936 * 2937 * Return value: 2938 * actual queue type set 2939 **/ 2940 static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) 2941 { 2942 if (sdev->tagged_supported) { 2943 scsi_set_tag_type(sdev, tag_type); 2944 2945 if (tag_type) 2946 scsi_activate_tcq(sdev, sdev->queue_depth); 2947 else 2948 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2949 } else 2950 tag_type = 0; 2951 2952 return tag_type; 2953 } 2954 2955 static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2956 struct device_attribute *attr, char *buf) 2957 { 2958 struct Scsi_Host *shost = class_to_shost(dev); 2959 struct ibmvfc_host *vhost = shost_priv(shost); 2960 2961 return snprintf(buf, PAGE_SIZE, "%s\n", 2962 vhost->login_buf->resp.partition_name); 2963 } 2964 2965 static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2966 struct device_attribute *attr, char *buf) 2967 { 2968 struct Scsi_Host *shost = class_to_shost(dev); 2969 struct ibmvfc_host *vhost = shost_priv(shost); 2970 2971 return snprintf(buf, PAGE_SIZE, "%s\n", 2972 vhost->login_buf->resp.device_name); 2973 } 2974 2975 static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2976 struct device_attribute *attr, char *buf) 2977 { 2978 struct Scsi_Host *shost = class_to_shost(dev); 2979 struct ibmvfc_host *vhost = shost_priv(shost); 2980 2981 return snprintf(buf, PAGE_SIZE, "%s\n", 2982 vhost->login_buf->resp.port_loc_code); 2983 } 2984 2985 static ssize_t ibmvfc_show_host_drc_name(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 2991 return snprintf(buf, PAGE_SIZE, "%s\n", 2992 vhost->login_buf->resp.drc_name); 2993 } 2994 2995 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2996 struct device_attribute *attr, char *buf) 2997 { 2998 struct Scsi_Host *shost = class_to_shost(dev); 2999 struct ibmvfc_host *vhost = shost_priv(shost); 3000 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 3001 } 3002 3003 static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 3004 struct device_attribute *attr, char *buf) 3005 { 3006 struct Scsi_Host *shost = class_to_shost(dev); 3007 struct ibmvfc_host *vhost = shost_priv(shost); 3008 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); 3009 } 3010 3011 /** 3012 * ibmvfc_show_log_level - Show the adapter's error logging level 3013 * @dev: class device struct 3014 * @buf: buffer 3015 * 3016 * Return value: 3017 * number of bytes printed to buffer 3018 **/ 3019 static ssize_t ibmvfc_show_log_level(struct device *dev, 3020 struct device_attribute *attr, char *buf) 3021 { 3022 struct Scsi_Host *shost = class_to_shost(dev); 3023 struct ibmvfc_host *vhost = shost_priv(shost); 3024 unsigned long flags = 0; 3025 int len; 3026 3027 spin_lock_irqsave(shost->host_lock, flags); 3028 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 3029 spin_unlock_irqrestore(shost->host_lock, flags); 3030 return len; 3031 } 3032 3033 /** 3034 * ibmvfc_store_log_level - Change the adapter's error logging level 3035 * @dev: class device struct 3036 * @buf: buffer 3037 * 3038 * Return value: 3039 * number of bytes printed to buffer 3040 **/ 3041 static ssize_t ibmvfc_store_log_level(struct device *dev, 3042 struct device_attribute *attr, 3043 const char *buf, size_t count) 3044 { 3045 struct Scsi_Host *shost = class_to_shost(dev); 3046 struct ibmvfc_host *vhost = shost_priv(shost); 3047 unsigned long flags = 0; 3048 3049 spin_lock_irqsave(shost->host_lock, flags); 3050 vhost->log_level = simple_strtoul(buf, NULL, 10); 3051 spin_unlock_irqrestore(shost->host_lock, flags); 3052 return strlen(buf); 3053 } 3054 3055 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 3056 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 3057 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 3058 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 3059 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 3060 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 3061 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 3062 ibmvfc_show_log_level, ibmvfc_store_log_level); 3063 3064 #ifdef CONFIG_SCSI_IBMVFC_TRACE 3065 /** 3066 * ibmvfc_read_trace - Dump the adapter trace 3067 * @filp: open sysfs file 3068 * @kobj: kobject struct 3069 * @bin_attr: bin_attribute struct 3070 * @buf: buffer 3071 * @off: offset 3072 * @count: buffer size 3073 * 3074 * Return value: 3075 * number of bytes printed to buffer 3076 **/ 3077 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 3078 struct bin_attribute *bin_attr, 3079 char *buf, loff_t off, size_t count) 3080 { 3081 struct device *dev = container_of(kobj, struct device, kobj); 3082 struct Scsi_Host *shost = class_to_shost(dev); 3083 struct ibmvfc_host *vhost = shost_priv(shost); 3084 unsigned long flags = 0; 3085 int size = IBMVFC_TRACE_SIZE; 3086 char *src = (char *)vhost->trace; 3087 3088 if (off > size) 3089 return 0; 3090 if (off + count > size) { 3091 size -= off; 3092 count = size; 3093 } 3094 3095 spin_lock_irqsave(shost->host_lock, flags); 3096 memcpy(buf, &src[off], count); 3097 spin_unlock_irqrestore(shost->host_lock, flags); 3098 return count; 3099 } 3100 3101 static struct bin_attribute ibmvfc_trace_attr = { 3102 .attr = { 3103 .name = "trace", 3104 .mode = S_IRUGO, 3105 }, 3106 .size = 0, 3107 .read = ibmvfc_read_trace, 3108 }; 3109 #endif 3110 3111 static struct device_attribute *ibmvfc_attrs[] = { 3112 &dev_attr_partition_name, 3113 &dev_attr_device_name, 3114 &dev_attr_port_loc_code, 3115 &dev_attr_drc_name, 3116 &dev_attr_npiv_version, 3117 &dev_attr_capabilities, 3118 &dev_attr_log_level, 3119 NULL 3120 }; 3121 3122 static struct scsi_host_template driver_template = { 3123 .module = THIS_MODULE, 3124 .name = "IBM POWER Virtual FC Adapter", 3125 .proc_name = IBMVFC_NAME, 3126 .queuecommand = ibmvfc_queuecommand, 3127 .eh_abort_handler = ibmvfc_eh_abort_handler, 3128 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3129 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3130 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3131 .slave_alloc = ibmvfc_slave_alloc, 3132 .slave_configure = ibmvfc_slave_configure, 3133 .target_alloc = ibmvfc_target_alloc, 3134 .scan_finished = ibmvfc_scan_finished, 3135 .change_queue_depth = ibmvfc_change_queue_depth, 3136 .change_queue_type = ibmvfc_change_queue_type, 3137 .cmd_per_lun = 16, 3138 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3139 .this_id = -1, 3140 .sg_tablesize = SG_ALL, 3141 .max_sectors = IBMVFC_MAX_SECTORS, 3142 .use_clustering = ENABLE_CLUSTERING, 3143 .shost_attrs = ibmvfc_attrs, 3144 }; 3145 3146 /** 3147 * ibmvfc_next_async_crq - Returns the next entry in async queue 3148 * @vhost: ibmvfc host struct 3149 * 3150 * Returns: 3151 * Pointer to next entry in queue / NULL if empty 3152 **/ 3153 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3154 { 3155 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 3156 struct ibmvfc_async_crq *crq; 3157 3158 crq = &async_crq->msgs[async_crq->cur]; 3159 if (crq->valid & 0x80) { 3160 if (++async_crq->cur == async_crq->size) 3161 async_crq->cur = 0; 3162 rmb(); 3163 } else 3164 crq = NULL; 3165 3166 return crq; 3167 } 3168 3169 /** 3170 * ibmvfc_next_crq - Returns the next entry in message queue 3171 * @vhost: ibmvfc host struct 3172 * 3173 * Returns: 3174 * Pointer to next entry in queue / NULL if empty 3175 **/ 3176 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3177 { 3178 struct ibmvfc_crq_queue *queue = &vhost->crq; 3179 struct ibmvfc_crq *crq; 3180 3181 crq = &queue->msgs[queue->cur]; 3182 if (crq->valid & 0x80) { 3183 if (++queue->cur == queue->size) 3184 queue->cur = 0; 3185 rmb(); 3186 } else 3187 crq = NULL; 3188 3189 return crq; 3190 } 3191 3192 /** 3193 * ibmvfc_interrupt - Interrupt handler 3194 * @irq: number of irq to handle, not used 3195 * @dev_instance: ibmvfc_host that received interrupt 3196 * 3197 * Returns: 3198 * IRQ_HANDLED 3199 **/ 3200 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3201 { 3202 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3203 unsigned long flags; 3204 3205 spin_lock_irqsave(vhost->host->host_lock, flags); 3206 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3207 tasklet_schedule(&vhost->tasklet); 3208 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3209 return IRQ_HANDLED; 3210 } 3211 3212 /** 3213 * ibmvfc_tasklet - Interrupt handler tasklet 3214 * @data: ibmvfc host struct 3215 * 3216 * Returns: 3217 * Nothing 3218 **/ 3219 static void ibmvfc_tasklet(void *data) 3220 { 3221 struct ibmvfc_host *vhost = data; 3222 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3223 struct ibmvfc_crq *crq; 3224 struct ibmvfc_async_crq *async; 3225 unsigned long flags; 3226 int done = 0; 3227 3228 spin_lock_irqsave(vhost->host->host_lock, flags); 3229 while (!done) { 3230 /* Pull all the valid messages off the async CRQ */ 3231 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3232 ibmvfc_handle_async(async, vhost); 3233 async->valid = 0; 3234 wmb(); 3235 } 3236 3237 /* Pull all the valid messages off the CRQ */ 3238 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3239 ibmvfc_handle_crq(crq, vhost); 3240 crq->valid = 0; 3241 wmb(); 3242 } 3243 3244 vio_enable_interrupts(vdev); 3245 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3246 vio_disable_interrupts(vdev); 3247 ibmvfc_handle_async(async, vhost); 3248 async->valid = 0; 3249 wmb(); 3250 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3251 vio_disable_interrupts(vdev); 3252 ibmvfc_handle_crq(crq, vhost); 3253 crq->valid = 0; 3254 wmb(); 3255 } else 3256 done = 1; 3257 } 3258 3259 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3260 } 3261 3262 /** 3263 * ibmvfc_init_tgt - Set the next init job step for the target 3264 * @tgt: ibmvfc target struct 3265 * @job_step: job step to perform 3266 * 3267 **/ 3268 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3269 void (*job_step) (struct ibmvfc_target *)) 3270 { 3271 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 3272 tgt->job_step = job_step; 3273 wake_up(&tgt->vhost->work_wait_q); 3274 } 3275 3276 /** 3277 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3278 * @tgt: ibmvfc target struct 3279 * @job_step: initialization job step 3280 * 3281 * Returns: 1 if step will be retried / 0 if not 3282 * 3283 **/ 3284 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3285 void (*job_step) (struct ibmvfc_target *)) 3286 { 3287 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3288 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3289 wake_up(&tgt->vhost->work_wait_q); 3290 return 0; 3291 } else 3292 ibmvfc_init_tgt(tgt, job_step); 3293 return 1; 3294 } 3295 3296 /* Defined in FC-LS */ 3297 static const struct { 3298 int code; 3299 int retry; 3300 int logged_in; 3301 } prli_rsp [] = { 3302 { 0, 1, 0 }, 3303 { 1, 0, 1 }, 3304 { 2, 1, 0 }, 3305 { 3, 1, 0 }, 3306 { 4, 0, 0 }, 3307 { 5, 0, 0 }, 3308 { 6, 0, 1 }, 3309 { 7, 0, 0 }, 3310 { 8, 1, 0 }, 3311 }; 3312 3313 /** 3314 * ibmvfc_get_prli_rsp - Find PRLI response index 3315 * @flags: PRLI response flags 3316 * 3317 **/ 3318 static int ibmvfc_get_prli_rsp(u16 flags) 3319 { 3320 int i; 3321 int code = (flags & 0x0f00) >> 8; 3322 3323 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3324 if (prli_rsp[i].code == code) 3325 return i; 3326 3327 return 0; 3328 } 3329 3330 /** 3331 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3332 * @evt: ibmvfc event struct 3333 * 3334 **/ 3335 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3336 { 3337 struct ibmvfc_target *tgt = evt->tgt; 3338 struct ibmvfc_host *vhost = evt->vhost; 3339 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3340 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3341 u32 status = be16_to_cpu(rsp->common.status); 3342 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3343 3344 vhost->discovery_threads--; 3345 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3346 switch (status) { 3347 case IBMVFC_MAD_SUCCESS: 3348 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3349 parms->type, parms->flags, parms->service_parms); 3350 3351 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3352 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); 3353 if (prli_rsp[index].logged_in) { 3354 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { 3355 tgt->need_login = 0; 3356 tgt->ids.roles = 0; 3357 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) 3358 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3359 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) 3360 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3361 tgt->add_rport = 1; 3362 } else 3363 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3364 } else if (prli_rsp[index].retry) 3365 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3366 else 3367 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3368 } else 3369 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3370 break; 3371 case IBMVFC_MAD_DRIVER_FAILED: 3372 break; 3373 case IBMVFC_MAD_CRQ_ERROR: 3374 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3375 break; 3376 case IBMVFC_MAD_FAILED: 3377 default: 3378 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && 3379 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) 3380 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3381 else if (tgt->logo_rcvd) 3382 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3383 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3384 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3385 else 3386 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3387 3388 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3389 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3390 rsp->status, rsp->error, status); 3391 break; 3392 }; 3393 3394 kref_put(&tgt->kref, ibmvfc_release_tgt); 3395 ibmvfc_free_event(evt); 3396 wake_up(&vhost->work_wait_q); 3397 } 3398 3399 /** 3400 * ibmvfc_tgt_send_prli - Send a process login 3401 * @tgt: ibmvfc target struct 3402 * 3403 **/ 3404 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3405 { 3406 struct ibmvfc_process_login *prli; 3407 struct ibmvfc_host *vhost = tgt->vhost; 3408 struct ibmvfc_event *evt; 3409 3410 if (vhost->discovery_threads >= disc_threads) 3411 return; 3412 3413 kref_get(&tgt->kref); 3414 evt = ibmvfc_get_event(vhost); 3415 vhost->discovery_threads++; 3416 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 3417 evt->tgt = tgt; 3418 prli = &evt->iu.prli; 3419 memset(prli, 0, sizeof(*prli)); 3420 prli->common.version = cpu_to_be32(1); 3421 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); 3422 prli->common.length = cpu_to_be16(sizeof(*prli)); 3423 prli->scsi_id = cpu_to_be64(tgt->scsi_id); 3424 3425 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 3426 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); 3427 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); 3428 3429 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3430 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3431 vhost->discovery_threads--; 3432 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3433 kref_put(&tgt->kref, ibmvfc_release_tgt); 3434 } else 3435 tgt_dbg(tgt, "Sent process login\n"); 3436 } 3437 3438 /** 3439 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 3440 * @evt: ibmvfc event struct 3441 * 3442 **/ 3443 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 3444 { 3445 struct ibmvfc_target *tgt = evt->tgt; 3446 struct ibmvfc_host *vhost = evt->vhost; 3447 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 3448 u32 status = be16_to_cpu(rsp->common.status); 3449 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3450 3451 vhost->discovery_threads--; 3452 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3453 switch (status) { 3454 case IBMVFC_MAD_SUCCESS: 3455 tgt_dbg(tgt, "Port Login succeeded\n"); 3456 if (tgt->ids.port_name && 3457 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 3458 vhost->reinit = 1; 3459 tgt_dbg(tgt, "Port re-init required\n"); 3460 break; 3461 } 3462 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3463 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3464 tgt->ids.port_id = tgt->scsi_id; 3465 memcpy(&tgt->service_parms, &rsp->service_parms, 3466 sizeof(tgt->service_parms)); 3467 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3468 sizeof(tgt->service_parms_change)); 3469 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3470 break; 3471 case IBMVFC_MAD_DRIVER_FAILED: 3472 break; 3473 case IBMVFC_MAD_CRQ_ERROR: 3474 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3475 break; 3476 case IBMVFC_MAD_FAILED: 3477 default: 3478 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3479 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3480 else 3481 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3482 3483 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3484 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), rsp->status, rsp->error, 3485 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), rsp->fc_type, 3486 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), rsp->fc_explain, status); 3487 break; 3488 }; 3489 3490 kref_put(&tgt->kref, ibmvfc_release_tgt); 3491 ibmvfc_free_event(evt); 3492 wake_up(&vhost->work_wait_q); 3493 } 3494 3495 /** 3496 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3497 * @tgt: ibmvfc target struct 3498 * 3499 **/ 3500 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3501 { 3502 struct ibmvfc_port_login *plogi; 3503 struct ibmvfc_host *vhost = tgt->vhost; 3504 struct ibmvfc_event *evt; 3505 3506 if (vhost->discovery_threads >= disc_threads) 3507 return; 3508 3509 kref_get(&tgt->kref); 3510 tgt->logo_rcvd = 0; 3511 evt = ibmvfc_get_event(vhost); 3512 vhost->discovery_threads++; 3513 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3514 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3515 evt->tgt = tgt; 3516 plogi = &evt->iu.plogi; 3517 memset(plogi, 0, sizeof(*plogi)); 3518 plogi->common.version = cpu_to_be32(1); 3519 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 3520 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 3521 plogi->scsi_id = cpu_to_be64(tgt->scsi_id); 3522 3523 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3524 vhost->discovery_threads--; 3525 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3526 kref_put(&tgt->kref, ibmvfc_release_tgt); 3527 } else 3528 tgt_dbg(tgt, "Sent port login\n"); 3529 } 3530 3531 /** 3532 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3533 * @evt: ibmvfc event struct 3534 * 3535 **/ 3536 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3537 { 3538 struct ibmvfc_target *tgt = evt->tgt; 3539 struct ibmvfc_host *vhost = evt->vhost; 3540 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3541 u32 status = be16_to_cpu(rsp->common.status); 3542 3543 vhost->discovery_threads--; 3544 ibmvfc_free_event(evt); 3545 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3546 3547 switch (status) { 3548 case IBMVFC_MAD_SUCCESS: 3549 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3550 break; 3551 case IBMVFC_MAD_DRIVER_FAILED: 3552 kref_put(&tgt->kref, ibmvfc_release_tgt); 3553 wake_up(&vhost->work_wait_q); 3554 return; 3555 case IBMVFC_MAD_FAILED: 3556 default: 3557 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3558 break; 3559 }; 3560 3561 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3562 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3563 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3564 tgt->scsi_id != tgt->new_scsi_id) 3565 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3566 kref_put(&tgt->kref, ibmvfc_release_tgt); 3567 wake_up(&vhost->work_wait_q); 3568 } 3569 3570 /** 3571 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3572 * @tgt: ibmvfc target struct 3573 * 3574 **/ 3575 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3576 { 3577 struct ibmvfc_implicit_logout *mad; 3578 struct ibmvfc_host *vhost = tgt->vhost; 3579 struct ibmvfc_event *evt; 3580 3581 if (vhost->discovery_threads >= disc_threads) 3582 return; 3583 3584 kref_get(&tgt->kref); 3585 evt = ibmvfc_get_event(vhost); 3586 vhost->discovery_threads++; 3587 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3588 evt->tgt = tgt; 3589 mad = &evt->iu.implicit_logout; 3590 memset(mad, 0, sizeof(*mad)); 3591 mad->common.version = cpu_to_be32(1); 3592 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); 3593 mad->common.length = cpu_to_be16(sizeof(*mad)); 3594 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); 3595 3596 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3597 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3598 vhost->discovery_threads--; 3599 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3600 kref_put(&tgt->kref, ibmvfc_release_tgt); 3601 } else 3602 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3603 } 3604 3605 /** 3606 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3607 * @mad: ibmvfc passthru mad struct 3608 * @tgt: ibmvfc target struct 3609 * 3610 * Returns: 3611 * 1 if PLOGI needed / 0 if PLOGI not needed 3612 **/ 3613 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3614 struct ibmvfc_target *tgt) 3615 { 3616 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3617 sizeof(tgt->ids.port_name))) 3618 return 1; 3619 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3620 sizeof(tgt->ids.node_name))) 3621 return 1; 3622 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) 3623 return 1; 3624 return 0; 3625 } 3626 3627 /** 3628 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3629 * @evt: ibmvfc event struct 3630 * 3631 **/ 3632 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3633 { 3634 struct ibmvfc_target *tgt = evt->tgt; 3635 struct ibmvfc_host *vhost = evt->vhost; 3636 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3637 u32 status = be16_to_cpu(mad->common.status); 3638 u8 fc_reason, fc_explain; 3639 3640 vhost->discovery_threads--; 3641 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3642 del_timer(&tgt->timer); 3643 3644 switch (status) { 3645 case IBMVFC_MAD_SUCCESS: 3646 tgt_dbg(tgt, "ADISC succeeded\n"); 3647 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3648 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3649 break; 3650 case IBMVFC_MAD_DRIVER_FAILED: 3651 break; 3652 case IBMVFC_MAD_FAILED: 3653 default: 3654 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3655 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; 3656 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; 3657 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3658 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), 3659 mad->iu.status, mad->iu.error, 3660 ibmvfc_get_fc_type(fc_reason), fc_reason, 3661 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3662 break; 3663 }; 3664 3665 kref_put(&tgt->kref, ibmvfc_release_tgt); 3666 ibmvfc_free_event(evt); 3667 wake_up(&vhost->work_wait_q); 3668 } 3669 3670 /** 3671 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3672 * @evt: ibmvfc event struct 3673 * 3674 **/ 3675 static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3676 { 3677 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3678 3679 memset(mad, 0, sizeof(*mad)); 3680 mad->common.version = cpu_to_be32(1); 3681 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 3682 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 3683 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3684 offsetof(struct ibmvfc_passthru_mad, iu)); 3685 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 3686 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3687 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3688 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3689 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3690 offsetof(struct ibmvfc_passthru_fc_iu, payload)); 3691 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3692 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3693 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3694 offsetof(struct ibmvfc_passthru_fc_iu, response)); 3695 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3696 } 3697 3698 /** 3699 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3700 * @evt: ibmvfc event struct 3701 * 3702 * Just cleanup this event struct. Everything else is handled by 3703 * the ADISC completion handler. If the ADISC never actually comes 3704 * back, we still have the timer running on the ADISC event struct 3705 * which will fire and cause the CRQ to get reset. 3706 * 3707 **/ 3708 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3709 { 3710 struct ibmvfc_host *vhost = evt->vhost; 3711 struct ibmvfc_target *tgt = evt->tgt; 3712 3713 tgt_dbg(tgt, "ADISC cancel complete\n"); 3714 vhost->abort_threads--; 3715 ibmvfc_free_event(evt); 3716 kref_put(&tgt->kref, ibmvfc_release_tgt); 3717 wake_up(&vhost->work_wait_q); 3718 } 3719 3720 /** 3721 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3722 * @tgt: ibmvfc target struct 3723 * 3724 * If an ADISC times out, send a cancel. If the cancel times 3725 * out, reset the CRQ. When the ADISC comes back as cancelled, 3726 * log back into the target. 3727 **/ 3728 static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) 3729 { 3730 struct ibmvfc_host *vhost = tgt->vhost; 3731 struct ibmvfc_event *evt; 3732 struct ibmvfc_tmf *tmf; 3733 unsigned long flags; 3734 int rc; 3735 3736 tgt_dbg(tgt, "ADISC timeout\n"); 3737 spin_lock_irqsave(vhost->host->host_lock, flags); 3738 if (vhost->abort_threads >= disc_threads || 3739 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3740 vhost->state != IBMVFC_INITIALIZING || 3741 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3742 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3743 return; 3744 } 3745 3746 vhost->abort_threads++; 3747 kref_get(&tgt->kref); 3748 evt = ibmvfc_get_event(vhost); 3749 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3750 3751 evt->tgt = tgt; 3752 tmf = &evt->iu.tmf; 3753 memset(tmf, 0, sizeof(*tmf)); 3754 tmf->common.version = cpu_to_be32(1); 3755 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 3756 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 3757 tmf->scsi_id = cpu_to_be64(tgt->scsi_id); 3758 tmf->cancel_key = cpu_to_be32(tgt->cancel_key); 3759 3760 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3761 3762 if (rc) { 3763 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3764 vhost->abort_threads--; 3765 kref_put(&tgt->kref, ibmvfc_release_tgt); 3766 __ibmvfc_reset_host(vhost); 3767 } else 3768 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3769 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3770 } 3771 3772 /** 3773 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3774 * @tgt: ibmvfc target struct 3775 * 3776 * When sending an ADISC we end up with two timers running. The 3777 * first timer is the timer in the ibmvfc target struct. If this 3778 * fires, we send a cancel to the target. The second timer is the 3779 * timer on the ibmvfc event for the ADISC, which is longer. If that 3780 * fires, it means the ADISC timed out and our attempt to cancel it 3781 * also failed, so we need to reset the CRQ. 3782 **/ 3783 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3784 { 3785 struct ibmvfc_passthru_mad *mad; 3786 struct ibmvfc_host *vhost = tgt->vhost; 3787 struct ibmvfc_event *evt; 3788 3789 if (vhost->discovery_threads >= disc_threads) 3790 return; 3791 3792 kref_get(&tgt->kref); 3793 evt = ibmvfc_get_event(vhost); 3794 vhost->discovery_threads++; 3795 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3796 evt->tgt = tgt; 3797 3798 ibmvfc_init_passthru(evt); 3799 mad = &evt->iu.passthru; 3800 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); 3801 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); 3802 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); 3803 3804 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); 3805 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3806 sizeof(vhost->login_buf->resp.port_name)); 3807 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3808 sizeof(vhost->login_buf->resp.node_name)); 3809 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); 3810 3811 if (timer_pending(&tgt->timer)) 3812 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3813 else { 3814 tgt->timer.data = (unsigned long) tgt; 3815 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3816 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; 3817 add_timer(&tgt->timer); 3818 } 3819 3820 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3821 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3822 vhost->discovery_threads--; 3823 del_timer(&tgt->timer); 3824 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3825 kref_put(&tgt->kref, ibmvfc_release_tgt); 3826 } else 3827 tgt_dbg(tgt, "Sent ADISC\n"); 3828 } 3829 3830 /** 3831 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3832 * @evt: ibmvfc event struct 3833 * 3834 **/ 3835 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3836 { 3837 struct ibmvfc_target *tgt = evt->tgt; 3838 struct ibmvfc_host *vhost = evt->vhost; 3839 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3840 u32 status = be16_to_cpu(rsp->common.status); 3841 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3842 3843 vhost->discovery_threads--; 3844 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3845 switch (status) { 3846 case IBMVFC_MAD_SUCCESS: 3847 tgt_dbg(tgt, "Query Target succeeded\n"); 3848 tgt->new_scsi_id = be64_to_cpu(rsp->scsi_id); 3849 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) 3850 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3851 else 3852 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3853 break; 3854 case IBMVFC_MAD_DRIVER_FAILED: 3855 break; 3856 case IBMVFC_MAD_CRQ_ERROR: 3857 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3858 break; 3859 case IBMVFC_MAD_FAILED: 3860 default: 3861 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3862 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && 3863 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) 3864 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3865 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3866 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3867 else 3868 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3869 3870 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3871 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3872 rsp->status, rsp->error, ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), 3873 rsp->fc_type, ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), 3874 rsp->fc_explain, status); 3875 break; 3876 }; 3877 3878 kref_put(&tgt->kref, ibmvfc_release_tgt); 3879 ibmvfc_free_event(evt); 3880 wake_up(&vhost->work_wait_q); 3881 } 3882 3883 /** 3884 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3885 * @tgt: ibmvfc target struct 3886 * 3887 **/ 3888 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3889 { 3890 struct ibmvfc_query_tgt *query_tgt; 3891 struct ibmvfc_host *vhost = tgt->vhost; 3892 struct ibmvfc_event *evt; 3893 3894 if (vhost->discovery_threads >= disc_threads) 3895 return; 3896 3897 kref_get(&tgt->kref); 3898 evt = ibmvfc_get_event(vhost); 3899 vhost->discovery_threads++; 3900 evt->tgt = tgt; 3901 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3902 query_tgt = &evt->iu.query_tgt; 3903 memset(query_tgt, 0, sizeof(*query_tgt)); 3904 query_tgt->common.version = cpu_to_be32(1); 3905 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); 3906 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); 3907 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); 3908 3909 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3910 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3911 vhost->discovery_threads--; 3912 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3913 kref_put(&tgt->kref, ibmvfc_release_tgt); 3914 } else 3915 tgt_dbg(tgt, "Sent Query Target\n"); 3916 } 3917 3918 /** 3919 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3920 * @vhost: ibmvfc host struct 3921 * @scsi_id: SCSI ID to allocate target for 3922 * 3923 * Returns: 3924 * 0 on success / other on failure 3925 **/ 3926 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3927 { 3928 struct ibmvfc_target *tgt; 3929 unsigned long flags; 3930 3931 spin_lock_irqsave(vhost->host->host_lock, flags); 3932 list_for_each_entry(tgt, &vhost->targets, queue) { 3933 if (tgt->scsi_id == scsi_id) { 3934 if (tgt->need_login) 3935 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3936 goto unlock_out; 3937 } 3938 } 3939 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3940 3941 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3942 if (!tgt) { 3943 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", 3944 scsi_id); 3945 return -ENOMEM; 3946 } 3947 3948 memset(tgt, 0, sizeof(*tgt)); 3949 tgt->scsi_id = scsi_id; 3950 tgt->new_scsi_id = scsi_id; 3951 tgt->vhost = vhost; 3952 tgt->need_login = 1; 3953 tgt->cancel_key = vhost->task_set++; 3954 init_timer(&tgt->timer); 3955 kref_init(&tgt->kref); 3956 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3957 spin_lock_irqsave(vhost->host->host_lock, flags); 3958 list_add_tail(&tgt->queue, &vhost->targets); 3959 3960 unlock_out: 3961 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3962 return 0; 3963 } 3964 3965 /** 3966 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3967 * @vhost: ibmvfc host struct 3968 * 3969 * Returns: 3970 * 0 on success / other on failure 3971 **/ 3972 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3973 { 3974 int i, rc; 3975 3976 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3977 rc = ibmvfc_alloc_target(vhost, 3978 be32_to_cpu(vhost->disc_buf->scsi_id[i]) & 3979 IBMVFC_DISC_TGT_SCSI_ID_MASK); 3980 3981 return rc; 3982 } 3983 3984 /** 3985 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3986 * @evt: ibmvfc event struct 3987 * 3988 **/ 3989 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3990 { 3991 struct ibmvfc_host *vhost = evt->vhost; 3992 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3993 u32 mad_status = be16_to_cpu(rsp->common.status); 3994 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3995 3996 switch (mad_status) { 3997 case IBMVFC_MAD_SUCCESS: 3998 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3999 vhost->num_targets = be32_to_cpu(rsp->num_written); 4000 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 4001 break; 4002 case IBMVFC_MAD_FAILED: 4003 level += ibmvfc_retry_host_init(vhost); 4004 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 4005 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4006 rsp->status, rsp->error); 4007 break; 4008 case IBMVFC_MAD_DRIVER_FAILED: 4009 break; 4010 default: 4011 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 4012 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4013 break; 4014 } 4015 4016 ibmvfc_free_event(evt); 4017 wake_up(&vhost->work_wait_q); 4018 } 4019 4020 /** 4021 * ibmvfc_discover_targets - Send Discover Targets MAD 4022 * @vhost: ibmvfc host struct 4023 * 4024 **/ 4025 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 4026 { 4027 struct ibmvfc_discover_targets *mad; 4028 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4029 4030 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 4031 mad = &evt->iu.discover_targets; 4032 memset(mad, 0, sizeof(*mad)); 4033 mad->common.version = cpu_to_be32(1); 4034 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); 4035 mad->common.length = cpu_to_be16(sizeof(*mad)); 4036 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz); 4037 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma); 4038 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz); 4039 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4040 4041 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4042 ibmvfc_dbg(vhost, "Sent discover targets\n"); 4043 else 4044 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4045 } 4046 4047 /** 4048 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 4049 * @evt: ibmvfc event struct 4050 * 4051 **/ 4052 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 4053 { 4054 struct ibmvfc_host *vhost = evt->vhost; 4055 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); 4056 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 4057 unsigned int npiv_max_sectors; 4058 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4059 4060 switch (mad_status) { 4061 case IBMVFC_MAD_SUCCESS: 4062 ibmvfc_free_event(evt); 4063 break; 4064 case IBMVFC_MAD_FAILED: 4065 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4066 level += ibmvfc_retry_host_init(vhost); 4067 else 4068 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4069 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 4070 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4071 rsp->status, rsp->error); 4072 ibmvfc_free_event(evt); 4073 return; 4074 case IBMVFC_MAD_CRQ_ERROR: 4075 ibmvfc_retry_host_init(vhost); 4076 case IBMVFC_MAD_DRIVER_FAILED: 4077 ibmvfc_free_event(evt); 4078 return; 4079 default: 4080 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 4081 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4082 ibmvfc_free_event(evt); 4083 return; 4084 } 4085 4086 vhost->client_migrated = 0; 4087 4088 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { 4089 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 4090 rsp->flags); 4091 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4092 wake_up(&vhost->work_wait_q); 4093 return; 4094 } 4095 4096 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { 4097 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 4098 rsp->max_cmds); 4099 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4100 wake_up(&vhost->work_wait_q); 4101 return; 4102 } 4103 4104 vhost->logged_in = 1; 4105 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); 4106 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 4107 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 4108 rsp->drc_name, npiv_max_sectors); 4109 4110 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); 4111 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); 4112 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); 4113 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); 4114 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 4115 fc_host_supported_classes(vhost->host) = 0; 4116 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) 4117 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 4118 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) 4119 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 4120 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) 4121 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 4122 fc_host_maxframe_size(vhost->host) = 4123 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; 4124 4125 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; 4126 vhost->host->max_sectors = npiv_max_sectors; 4127 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4128 wake_up(&vhost->work_wait_q); 4129 } 4130 4131 /** 4132 * ibmvfc_npiv_login - Sends NPIV login 4133 * @vhost: ibmvfc host struct 4134 * 4135 **/ 4136 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 4137 { 4138 struct ibmvfc_npiv_login_mad *mad; 4139 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4140 4141 ibmvfc_gather_partition_info(vhost); 4142 ibmvfc_set_login_info(vhost); 4143 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 4144 4145 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 4146 mad = &evt->iu.npiv_login; 4147 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 4148 mad->common.version = cpu_to_be32(1); 4149 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); 4150 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); 4151 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); 4152 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); 4153 4154 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4155 4156 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4157 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 4158 else 4159 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4160 }; 4161 4162 /** 4163 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 4164 * @vhost: ibmvfc host struct 4165 * 4166 **/ 4167 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 4168 { 4169 struct ibmvfc_host *vhost = evt->vhost; 4170 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); 4171 4172 ibmvfc_free_event(evt); 4173 4174 switch (mad_status) { 4175 case IBMVFC_MAD_SUCCESS: 4176 if (list_empty(&vhost->sent) && 4177 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 4178 ibmvfc_init_host(vhost); 4179 return; 4180 } 4181 break; 4182 case IBMVFC_MAD_FAILED: 4183 case IBMVFC_MAD_NOT_SUPPORTED: 4184 case IBMVFC_MAD_CRQ_ERROR: 4185 case IBMVFC_MAD_DRIVER_FAILED: 4186 default: 4187 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 4188 break; 4189 } 4190 4191 ibmvfc_hard_reset_host(vhost); 4192 } 4193 4194 /** 4195 * ibmvfc_npiv_logout - Issue an NPIV Logout 4196 * @vhost: ibmvfc host struct 4197 * 4198 **/ 4199 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 4200 { 4201 struct ibmvfc_npiv_logout_mad *mad; 4202 struct ibmvfc_event *evt; 4203 4204 evt = ibmvfc_get_event(vhost); 4205 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 4206 4207 mad = &evt->iu.npiv_logout; 4208 memset(mad, 0, sizeof(*mad)); 4209 mad->common.version = cpu_to_be32(1); 4210 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); 4211 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); 4212 4213 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 4214 4215 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4216 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 4217 else 4218 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4219 } 4220 4221 /** 4222 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 4223 * @vhost: ibmvfc host struct 4224 * 4225 * Returns: 4226 * 1 if work to do / 0 if not 4227 **/ 4228 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 4229 { 4230 struct ibmvfc_target *tgt; 4231 4232 list_for_each_entry(tgt, &vhost->targets, queue) { 4233 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 4234 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4235 return 1; 4236 } 4237 4238 return 0; 4239 } 4240 4241 /** 4242 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 4243 * @vhost: ibmvfc host struct 4244 * 4245 * Returns: 4246 * 1 if work to do / 0 if not 4247 **/ 4248 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4249 { 4250 struct ibmvfc_target *tgt; 4251 4252 if (kthread_should_stop()) 4253 return 1; 4254 switch (vhost->action) { 4255 case IBMVFC_HOST_ACTION_NONE: 4256 case IBMVFC_HOST_ACTION_INIT_WAIT: 4257 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4258 return 0; 4259 case IBMVFC_HOST_ACTION_TGT_INIT: 4260 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4261 if (vhost->discovery_threads == disc_threads) 4262 return 0; 4263 list_for_each_entry(tgt, &vhost->targets, queue) 4264 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 4265 return 1; 4266 list_for_each_entry(tgt, &vhost->targets, queue) 4267 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4268 return 0; 4269 return 1; 4270 case IBMVFC_HOST_ACTION_LOGO: 4271 case IBMVFC_HOST_ACTION_INIT: 4272 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4273 case IBMVFC_HOST_ACTION_TGT_DEL: 4274 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4275 case IBMVFC_HOST_ACTION_QUERY: 4276 case IBMVFC_HOST_ACTION_RESET: 4277 case IBMVFC_HOST_ACTION_REENABLE: 4278 default: 4279 break; 4280 }; 4281 4282 return 1; 4283 } 4284 4285 /** 4286 * ibmvfc_work_to_do - Is there task level work to do? 4287 * @vhost: ibmvfc host struct 4288 * 4289 * Returns: 4290 * 1 if work to do / 0 if not 4291 **/ 4292 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4293 { 4294 unsigned long flags; 4295 int rc; 4296 4297 spin_lock_irqsave(vhost->host->host_lock, flags); 4298 rc = __ibmvfc_work_to_do(vhost); 4299 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4300 return rc; 4301 } 4302 4303 /** 4304 * ibmvfc_log_ae - Log async events if necessary 4305 * @vhost: ibmvfc host struct 4306 * @events: events to log 4307 * 4308 **/ 4309 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 4310 { 4311 if (events & IBMVFC_AE_RSCN) 4312 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 4313 if ((events & IBMVFC_AE_LINKDOWN) && 4314 vhost->state >= IBMVFC_HALTED) 4315 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 4316 if ((events & IBMVFC_AE_LINKUP) && 4317 vhost->state == IBMVFC_INITIALIZING) 4318 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 4319 } 4320 4321 /** 4322 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 4323 * @tgt: ibmvfc target struct 4324 * 4325 **/ 4326 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 4327 { 4328 struct ibmvfc_host *vhost = tgt->vhost; 4329 struct fc_rport *rport; 4330 unsigned long flags; 4331 4332 tgt_dbg(tgt, "Adding rport\n"); 4333 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 4334 spin_lock_irqsave(vhost->host->host_lock, flags); 4335 4336 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4337 tgt_dbg(tgt, "Deleting rport\n"); 4338 list_del(&tgt->queue); 4339 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4340 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4341 fc_remote_port_delete(rport); 4342 del_timer_sync(&tgt->timer); 4343 kref_put(&tgt->kref, ibmvfc_release_tgt); 4344 return; 4345 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 4346 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4347 return; 4348 } 4349 4350 if (rport) { 4351 tgt_dbg(tgt, "rport add succeeded\n"); 4352 tgt->rport = rport; 4353 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; 4354 rport->supported_classes = 0; 4355 tgt->target_id = rport->scsi_target_id; 4356 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) 4357 rport->supported_classes |= FC_COS_CLASS1; 4358 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) 4359 rport->supported_classes |= FC_COS_CLASS2; 4360 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) 4361 rport->supported_classes |= FC_COS_CLASS3; 4362 if (rport->rqst_q) 4363 blk_queue_max_segments(rport->rqst_q, 1); 4364 } else 4365 tgt_dbg(tgt, "rport add failed\n"); 4366 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4367 } 4368 4369 /** 4370 * ibmvfc_do_work - Do task level work 4371 * @vhost: ibmvfc host struct 4372 * 4373 **/ 4374 static void ibmvfc_do_work(struct ibmvfc_host *vhost) 4375 { 4376 struct ibmvfc_target *tgt; 4377 unsigned long flags; 4378 struct fc_rport *rport; 4379 int rc; 4380 4381 ibmvfc_log_ae(vhost, vhost->events_to_log); 4382 spin_lock_irqsave(vhost->host->host_lock, flags); 4383 vhost->events_to_log = 0; 4384 switch (vhost->action) { 4385 case IBMVFC_HOST_ACTION_NONE: 4386 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4387 case IBMVFC_HOST_ACTION_INIT_WAIT: 4388 break; 4389 case IBMVFC_HOST_ACTION_RESET: 4390 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4391 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4392 rc = ibmvfc_reset_crq(vhost); 4393 spin_lock_irqsave(vhost->host->host_lock, flags); 4394 if (rc == H_CLOSED) 4395 vio_enable_interrupts(to_vio_dev(vhost->dev)); 4396 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 4397 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 4398 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4399 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 4400 } 4401 break; 4402 case IBMVFC_HOST_ACTION_REENABLE: 4403 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4404 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4405 rc = ibmvfc_reenable_crq_queue(vhost); 4406 spin_lock_irqsave(vhost->host->host_lock, flags); 4407 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 4408 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4409 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 4410 } 4411 break; 4412 case IBMVFC_HOST_ACTION_LOGO: 4413 vhost->job_step(vhost); 4414 break; 4415 case IBMVFC_HOST_ACTION_INIT: 4416 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 4417 if (vhost->delay_init) { 4418 vhost->delay_init = 0; 4419 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4420 ssleep(15); 4421 return; 4422 } else 4423 vhost->job_step(vhost); 4424 break; 4425 case IBMVFC_HOST_ACTION_QUERY: 4426 list_for_each_entry(tgt, &vhost->targets, queue) 4427 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 4428 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 4429 break; 4430 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4431 list_for_each_entry(tgt, &vhost->targets, queue) { 4432 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4433 tgt->job_step(tgt); 4434 break; 4435 } 4436 } 4437 4438 if (!ibmvfc_dev_init_to_do(vhost)) 4439 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 4440 break; 4441 case IBMVFC_HOST_ACTION_TGT_DEL: 4442 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4443 list_for_each_entry(tgt, &vhost->targets, queue) { 4444 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4445 tgt_dbg(tgt, "Deleting rport\n"); 4446 rport = tgt->rport; 4447 tgt->rport = NULL; 4448 list_del(&tgt->queue); 4449 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4450 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4451 if (rport) 4452 fc_remote_port_delete(rport); 4453 del_timer_sync(&tgt->timer); 4454 kref_put(&tgt->kref, ibmvfc_release_tgt); 4455 return; 4456 } 4457 } 4458 4459 if (vhost->state == IBMVFC_INITIALIZING) { 4460 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 4461 if (vhost->reinit) { 4462 vhost->reinit = 0; 4463 scsi_block_requests(vhost->host); 4464 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4465 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4466 } else { 4467 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 4468 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4469 wake_up(&vhost->init_wait_q); 4470 schedule_work(&vhost->rport_add_work_q); 4471 vhost->init_retries = 0; 4472 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4473 scsi_unblock_requests(vhost->host); 4474 } 4475 4476 return; 4477 } else { 4478 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 4479 vhost->job_step = ibmvfc_discover_targets; 4480 } 4481 } else { 4482 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4483 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4484 scsi_unblock_requests(vhost->host); 4485 wake_up(&vhost->init_wait_q); 4486 return; 4487 } 4488 break; 4489 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4490 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4491 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4492 ibmvfc_alloc_targets(vhost); 4493 spin_lock_irqsave(vhost->host->host_lock, flags); 4494 break; 4495 case IBMVFC_HOST_ACTION_TGT_INIT: 4496 list_for_each_entry(tgt, &vhost->targets, queue) { 4497 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4498 tgt->job_step(tgt); 4499 break; 4500 } 4501 } 4502 4503 if (!ibmvfc_dev_init_to_do(vhost)) 4504 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4505 break; 4506 default: 4507 break; 4508 }; 4509 4510 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4511 } 4512 4513 /** 4514 * ibmvfc_work - Do task level work 4515 * @data: ibmvfc host struct 4516 * 4517 * Returns: 4518 * zero 4519 **/ 4520 static int ibmvfc_work(void *data) 4521 { 4522 struct ibmvfc_host *vhost = data; 4523 int rc; 4524 4525 set_user_nice(current, MIN_NICE); 4526 4527 while (1) { 4528 rc = wait_event_interruptible(vhost->work_wait_q, 4529 ibmvfc_work_to_do(vhost)); 4530 4531 BUG_ON(rc); 4532 4533 if (kthread_should_stop()) 4534 break; 4535 4536 ibmvfc_do_work(vhost); 4537 } 4538 4539 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4540 return 0; 4541 } 4542 4543 /** 4544 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4545 * @vhost: ibmvfc host struct 4546 * 4547 * Allocates a page for messages, maps it for dma, and registers 4548 * the crq with the hypervisor. 4549 * 4550 * Return value: 4551 * zero on success / other on failure 4552 **/ 4553 static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4554 { 4555 int rc, retrc = -ENOMEM; 4556 struct device *dev = vhost->dev; 4557 struct vio_dev *vdev = to_vio_dev(dev); 4558 struct ibmvfc_crq_queue *crq = &vhost->crq; 4559 4560 ENTER; 4561 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4562 4563 if (!crq->msgs) 4564 return -ENOMEM; 4565 4566 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4567 crq->msg_token = dma_map_single(dev, crq->msgs, 4568 PAGE_SIZE, DMA_BIDIRECTIONAL); 4569 4570 if (dma_mapping_error(dev, crq->msg_token)) 4571 goto map_failed; 4572 4573 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4574 crq->msg_token, PAGE_SIZE); 4575 4576 if (rc == H_RESOURCE) 4577 /* maybe kexecing and resource is busy. try a reset */ 4578 retrc = rc = ibmvfc_reset_crq(vhost); 4579 4580 if (rc == H_CLOSED) 4581 dev_warn(dev, "Partner adapter not ready\n"); 4582 else if (rc) { 4583 dev_warn(dev, "Error %d opening adapter\n", rc); 4584 goto reg_crq_failed; 4585 } 4586 4587 retrc = 0; 4588 4589 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4590 4591 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4592 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4593 goto req_irq_failed; 4594 } 4595 4596 if ((rc = vio_enable_interrupts(vdev))) { 4597 dev_err(dev, "Error %d enabling interrupts\n", rc); 4598 goto req_irq_failed; 4599 } 4600 4601 crq->cur = 0; 4602 LEAVE; 4603 return retrc; 4604 4605 req_irq_failed: 4606 tasklet_kill(&vhost->tasklet); 4607 do { 4608 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4609 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4610 reg_crq_failed: 4611 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4612 map_failed: 4613 free_page((unsigned long)crq->msgs); 4614 return retrc; 4615 } 4616 4617 /** 4618 * ibmvfc_free_mem - Free memory for vhost 4619 * @vhost: ibmvfc host struct 4620 * 4621 * Return value: 4622 * none 4623 **/ 4624 static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4625 { 4626 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4627 4628 ENTER; 4629 mempool_destroy(vhost->tgt_pool); 4630 kfree(vhost->trace); 4631 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4632 vhost->disc_buf_dma); 4633 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4634 vhost->login_buf, vhost->login_buf_dma); 4635 dma_pool_destroy(vhost->sg_pool); 4636 dma_unmap_single(vhost->dev, async_q->msg_token, 4637 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4638 free_page((unsigned long)async_q->msgs); 4639 LEAVE; 4640 } 4641 4642 /** 4643 * ibmvfc_alloc_mem - Allocate memory for vhost 4644 * @vhost: ibmvfc host struct 4645 * 4646 * Return value: 4647 * 0 on success / non-zero on failure 4648 **/ 4649 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4650 { 4651 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4652 struct device *dev = vhost->dev; 4653 4654 ENTER; 4655 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4656 if (!async_q->msgs) { 4657 dev_err(dev, "Couldn't allocate async queue.\n"); 4658 goto nomem; 4659 } 4660 4661 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4662 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4663 async_q->size * sizeof(*async_q->msgs), 4664 DMA_BIDIRECTIONAL); 4665 4666 if (dma_mapping_error(dev, async_q->msg_token)) { 4667 dev_err(dev, "Failed to map async queue\n"); 4668 goto free_async_crq; 4669 } 4670 4671 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4672 SG_ALL * sizeof(struct srp_direct_buf), 4673 sizeof(struct srp_direct_buf), 0); 4674 4675 if (!vhost->sg_pool) { 4676 dev_err(dev, "Failed to allocate sg pool\n"); 4677 goto unmap_async_crq; 4678 } 4679 4680 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4681 &vhost->login_buf_dma, GFP_KERNEL); 4682 4683 if (!vhost->login_buf) { 4684 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4685 goto free_sg_pool; 4686 } 4687 4688 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4689 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4690 &vhost->disc_buf_dma, GFP_KERNEL); 4691 4692 if (!vhost->disc_buf) { 4693 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4694 goto free_login_buffer; 4695 } 4696 4697 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4698 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4699 4700 if (!vhost->trace) 4701 goto free_disc_buffer; 4702 4703 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4704 sizeof(struct ibmvfc_target)); 4705 4706 if (!vhost->tgt_pool) { 4707 dev_err(dev, "Couldn't allocate target memory pool\n"); 4708 goto free_trace; 4709 } 4710 4711 LEAVE; 4712 return 0; 4713 4714 free_trace: 4715 kfree(vhost->trace); 4716 free_disc_buffer: 4717 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4718 vhost->disc_buf_dma); 4719 free_login_buffer: 4720 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4721 vhost->login_buf, vhost->login_buf_dma); 4722 free_sg_pool: 4723 dma_pool_destroy(vhost->sg_pool); 4724 unmap_async_crq: 4725 dma_unmap_single(dev, async_q->msg_token, 4726 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4727 free_async_crq: 4728 free_page((unsigned long)async_q->msgs); 4729 nomem: 4730 LEAVE; 4731 return -ENOMEM; 4732 } 4733 4734 /** 4735 * ibmvfc_rport_add_thread - Worker thread for rport adds 4736 * @work: work struct 4737 * 4738 **/ 4739 static void ibmvfc_rport_add_thread(struct work_struct *work) 4740 { 4741 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4742 rport_add_work_q); 4743 struct ibmvfc_target *tgt; 4744 struct fc_rport *rport; 4745 unsigned long flags; 4746 int did_work; 4747 4748 ENTER; 4749 spin_lock_irqsave(vhost->host->host_lock, flags); 4750 do { 4751 did_work = 0; 4752 if (vhost->state != IBMVFC_ACTIVE) 4753 break; 4754 4755 list_for_each_entry(tgt, &vhost->targets, queue) { 4756 if (tgt->add_rport) { 4757 did_work = 1; 4758 tgt->add_rport = 0; 4759 kref_get(&tgt->kref); 4760 rport = tgt->rport; 4761 if (!rport) { 4762 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4763 ibmvfc_tgt_add_rport(tgt); 4764 } else if (get_device(&rport->dev)) { 4765 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4766 tgt_dbg(tgt, "Setting rport roles\n"); 4767 fc_remote_port_rolechg(rport, tgt->ids.roles); 4768 put_device(&rport->dev); 4769 } 4770 4771 kref_put(&tgt->kref, ibmvfc_release_tgt); 4772 spin_lock_irqsave(vhost->host->host_lock, flags); 4773 break; 4774 } 4775 } 4776 } while(did_work); 4777 4778 if (vhost->state == IBMVFC_ACTIVE) 4779 vhost->scan_complete = 1; 4780 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4781 LEAVE; 4782 } 4783 4784 /** 4785 * ibmvfc_probe - Adapter hot plug add entry point 4786 * @vdev: vio device struct 4787 * @id: vio device id struct 4788 * 4789 * Return value: 4790 * 0 on success / non-zero on failure 4791 **/ 4792 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4793 { 4794 struct ibmvfc_host *vhost; 4795 struct Scsi_Host *shost; 4796 struct device *dev = &vdev->dev; 4797 int rc = -ENOMEM; 4798 4799 ENTER; 4800 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4801 if (!shost) { 4802 dev_err(dev, "Couldn't allocate host data\n"); 4803 goto out; 4804 } 4805 4806 shost->transportt = ibmvfc_transport_template; 4807 shost->can_queue = max_requests; 4808 shost->max_lun = max_lun; 4809 shost->max_id = max_targets; 4810 shost->max_sectors = IBMVFC_MAX_SECTORS; 4811 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4812 shost->unique_id = shost->host_no; 4813 4814 vhost = shost_priv(shost); 4815 INIT_LIST_HEAD(&vhost->sent); 4816 INIT_LIST_HEAD(&vhost->free); 4817 INIT_LIST_HEAD(&vhost->targets); 4818 sprintf(vhost->name, IBMVFC_NAME); 4819 vhost->host = shost; 4820 vhost->dev = dev; 4821 vhost->partition_number = -1; 4822 vhost->log_level = log_level; 4823 vhost->task_set = 1; 4824 strcpy(vhost->partition_name, "UNKNOWN"); 4825 init_waitqueue_head(&vhost->work_wait_q); 4826 init_waitqueue_head(&vhost->init_wait_q); 4827 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4828 mutex_init(&vhost->passthru_mutex); 4829 4830 if ((rc = ibmvfc_alloc_mem(vhost))) 4831 goto free_scsi_host; 4832 4833 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4834 shost->host_no); 4835 4836 if (IS_ERR(vhost->work_thread)) { 4837 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4838 PTR_ERR(vhost->work_thread)); 4839 goto free_host_mem; 4840 } 4841 4842 if ((rc = ibmvfc_init_crq(vhost))) { 4843 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4844 goto kill_kthread; 4845 } 4846 4847 if ((rc = ibmvfc_init_event_pool(vhost))) { 4848 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4849 goto release_crq; 4850 } 4851 4852 if ((rc = scsi_add_host(shost, dev))) 4853 goto release_event_pool; 4854 4855 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 4856 4857 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4858 &ibmvfc_trace_attr))) { 4859 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4860 goto remove_shost; 4861 } 4862 4863 if (shost_to_fc_host(shost)->rqst_q) 4864 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 4865 dev_set_drvdata(dev, vhost); 4866 spin_lock(&ibmvfc_driver_lock); 4867 list_add_tail(&vhost->queue, &ibmvfc_head); 4868 spin_unlock(&ibmvfc_driver_lock); 4869 4870 ibmvfc_send_crq_init(vhost); 4871 scsi_scan_host(shost); 4872 return 0; 4873 4874 remove_shost: 4875 scsi_remove_host(shost); 4876 release_event_pool: 4877 ibmvfc_free_event_pool(vhost); 4878 release_crq: 4879 ibmvfc_release_crq_queue(vhost); 4880 kill_kthread: 4881 kthread_stop(vhost->work_thread); 4882 free_host_mem: 4883 ibmvfc_free_mem(vhost); 4884 free_scsi_host: 4885 scsi_host_put(shost); 4886 out: 4887 LEAVE; 4888 return rc; 4889 } 4890 4891 /** 4892 * ibmvfc_remove - Adapter hot plug remove entry point 4893 * @vdev: vio device struct 4894 * 4895 * Return value: 4896 * 0 4897 **/ 4898 static int ibmvfc_remove(struct vio_dev *vdev) 4899 { 4900 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4901 unsigned long flags; 4902 4903 ENTER; 4904 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4905 4906 spin_lock_irqsave(vhost->host->host_lock, flags); 4907 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4908 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4909 4910 ibmvfc_wait_while_resetting(vhost); 4911 ibmvfc_release_crq_queue(vhost); 4912 kthread_stop(vhost->work_thread); 4913 fc_remove_host(vhost->host); 4914 scsi_remove_host(vhost->host); 4915 4916 spin_lock_irqsave(vhost->host->host_lock, flags); 4917 ibmvfc_purge_requests(vhost, DID_ERROR); 4918 ibmvfc_free_event_pool(vhost); 4919 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4920 4921 ibmvfc_free_mem(vhost); 4922 spin_lock(&ibmvfc_driver_lock); 4923 list_del(&vhost->queue); 4924 spin_unlock(&ibmvfc_driver_lock); 4925 scsi_host_put(vhost->host); 4926 LEAVE; 4927 return 0; 4928 } 4929 4930 /** 4931 * ibmvfc_resume - Resume from suspend 4932 * @dev: device struct 4933 * 4934 * We may have lost an interrupt across suspend/resume, so kick the 4935 * interrupt handler 4936 * 4937 */ 4938 static int ibmvfc_resume(struct device *dev) 4939 { 4940 unsigned long flags; 4941 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 4942 struct vio_dev *vdev = to_vio_dev(dev); 4943 4944 spin_lock_irqsave(vhost->host->host_lock, flags); 4945 vio_disable_interrupts(vdev); 4946 tasklet_schedule(&vhost->tasklet); 4947 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4948 return 0; 4949 } 4950 4951 /** 4952 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4953 * @vdev: vio device struct 4954 * 4955 * Return value: 4956 * Number of bytes the driver will need to DMA map at the same time in 4957 * order to perform well. 4958 */ 4959 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4960 { 4961 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4962 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4963 } 4964 4965 static struct vio_device_id ibmvfc_device_table[] = { 4966 {"fcp", "IBM,vfc-client"}, 4967 { "", "" } 4968 }; 4969 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4970 4971 static struct dev_pm_ops ibmvfc_pm_ops = { 4972 .resume = ibmvfc_resume 4973 }; 4974 4975 static struct vio_driver ibmvfc_driver = { 4976 .id_table = ibmvfc_device_table, 4977 .probe = ibmvfc_probe, 4978 .remove = ibmvfc_remove, 4979 .get_desired_dma = ibmvfc_get_desired_dma, 4980 .name = IBMVFC_NAME, 4981 .pm = &ibmvfc_pm_ops, 4982 }; 4983 4984 static struct fc_function_template ibmvfc_transport_functions = { 4985 .show_host_fabric_name = 1, 4986 .show_host_node_name = 1, 4987 .show_host_port_name = 1, 4988 .show_host_supported_classes = 1, 4989 .show_host_port_type = 1, 4990 .show_host_port_id = 1, 4991 .show_host_maxframe_size = 1, 4992 4993 .get_host_port_state = ibmvfc_get_host_port_state, 4994 .show_host_port_state = 1, 4995 4996 .get_host_speed = ibmvfc_get_host_speed, 4997 .show_host_speed = 1, 4998 4999 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 5000 .terminate_rport_io = ibmvfc_terminate_rport_io, 5001 5002 .show_rport_maxframe_size = 1, 5003 .show_rport_supported_classes = 1, 5004 5005 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 5006 .show_rport_dev_loss_tmo = 1, 5007 5008 .get_starget_node_name = ibmvfc_get_starget_node_name, 5009 .show_starget_node_name = 1, 5010 5011 .get_starget_port_name = ibmvfc_get_starget_port_name, 5012 .show_starget_port_name = 1, 5013 5014 .get_starget_port_id = ibmvfc_get_starget_port_id, 5015 .show_starget_port_id = 1, 5016 5017 .bsg_request = ibmvfc_bsg_request, 5018 .bsg_timeout = ibmvfc_bsg_timeout, 5019 }; 5020 5021 /** 5022 * ibmvfc_module_init - Initialize the ibmvfc module 5023 * 5024 * Return value: 5025 * 0 on success / other on failure 5026 **/ 5027 static int __init ibmvfc_module_init(void) 5028 { 5029 int rc; 5030 5031 if (!firmware_has_feature(FW_FEATURE_VIO)) 5032 return -ENODEV; 5033 5034 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 5035 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 5036 5037 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 5038 if (!ibmvfc_transport_template) 5039 return -ENOMEM; 5040 5041 rc = vio_register_driver(&ibmvfc_driver); 5042 if (rc) 5043 fc_release_transport(ibmvfc_transport_template); 5044 return rc; 5045 } 5046 5047 /** 5048 * ibmvfc_module_exit - Teardown the ibmvfc module 5049 * 5050 * Return value: 5051 * nothing 5052 **/ 5053 static void __exit ibmvfc_module_exit(void) 5054 { 5055 vio_unregister_driver(&ibmvfc_driver); 5056 fc_release_transport(ibmvfc_transport_template); 5057 } 5058 5059 module_init(ibmvfc_module_init); 5060 module_exit(ibmvfc_module_exit); 5061