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