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