ibmvfc.c revision d99e5f488ae28d9dfccc84435f4fd29bd1fe1b9b
1/* 2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 3 * 4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 5 * 6 * Copyright (C) IBM Corporation, 2008 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24#include <linux/module.h> 25#include <linux/moduleparam.h> 26#include <linux/dma-mapping.h> 27#include <linux/dmapool.h> 28#include <linux/delay.h> 29#include <linux/interrupt.h> 30#include <linux/kthread.h> 31#include <linux/slab.h> 32#include <linux/of.h> 33#include <linux/pm.h> 34#include <linux/stringify.h> 35#include <asm/firmware.h> 36#include <asm/irq.h> 37#include <asm/vio.h> 38#include <scsi/scsi.h> 39#include <scsi/scsi_cmnd.h> 40#include <scsi/scsi_host.h> 41#include <scsi/scsi_device.h> 42#include <scsi/scsi_tcq.h> 43#include <scsi/scsi_transport_fc.h> 44#include <scsi/scsi_bsg_fc.h> 45#include "ibmvfc.h" 46 47static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 48static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 49static unsigned int max_lun = IBMVFC_MAX_LUN; 50static unsigned int max_targets = IBMVFC_MAX_TARGETS; 51static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 52static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 53static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO; 54static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 55static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 56static LIST_HEAD(ibmvfc_head); 57static DEFINE_SPINLOCK(ibmvfc_driver_lock); 58static struct scsi_transport_template *ibmvfc_transport_template; 59 60MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 61MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 62MODULE_LICENSE("GPL"); 63MODULE_VERSION(IBMVFC_DRIVER_VERSION); 64 65module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 66MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 67 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 68module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 69MODULE_PARM_DESC(default_timeout, 70 "Default timeout in seconds for initialization and EH commands. " 71 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 72module_param_named(max_requests, max_requests, uint, S_IRUGO); 73MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 74 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 75module_param_named(max_lun, max_lun, uint, S_IRUGO); 76MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 77 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 78module_param_named(max_targets, max_targets, uint, S_IRUGO); 79MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 80 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 81module_param_named(disc_threads, disc_threads, uint, S_IRUGO); 82MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 83 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 84module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 85MODULE_PARM_DESC(debug, "Enable driver debug information. " 86 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 87module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR); 88MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC " 89 "transport should insulate the loss of a remote port. Once this " 90 "value is exceeded, the scsi target is removed. " 91 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]"); 92module_param_named(log_level, log_level, uint, 0); 93MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 94 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 95 96static const struct { 97 u16 status; 98 u16 error; 99 u8 result; 100 u8 retry; 101 int log; 102 char *name; 103} cmd_status [] = { 104 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 105 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 106 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 107 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 108 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 109 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 110 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 111 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 112 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 115 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 116 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 117 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 118 119 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 120 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 121 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 122 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 123 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 124 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 125 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 126 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 127 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 128 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 129 130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 131 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 132 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 133 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 134 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 135 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 136 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 137 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 138 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 139 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 140 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 141 142 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 143}; 144 145static void ibmvfc_npiv_login(struct ibmvfc_host *); 146static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 147static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 148static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 149static void ibmvfc_npiv_logout(struct ibmvfc_host *); 150 151static 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 **/ 159static 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 = 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 = vfc_cmd->iu.xfer_len; 179 break; 180 case IBMVFC_MAD_FORMAT: 181 entry->op_code = 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 **/ 193static 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 = 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 = vfc_cmd->status; 212 entry->u.end.error = 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 = mad->opcode; 219 entry->u.end.status = 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 **/ 240static 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 **/ 260static 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 **/ 275static 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 = 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(vfc_cmd->status, 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 **/ 300static 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 309static const char *unknown_fc_explain = "unknown fc explain"; 310 311static 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 334static 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 **/ 364static 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 **/ 382static 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 393static 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 405static 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 **/ 414static 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 **/ 431static 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 **/ 456static 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 **/ 479static 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 **/ 540static 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 **/ 559static 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 **/ 582static 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 **/ 617static 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 **/ 630static 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 **/ 643static 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 **/ 656static 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 **/ 684static 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 **/ 709static 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 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 727 728 /* Clean out the queue */ 729 memset(crq->msgs, 0, PAGE_SIZE); 730 crq->cur = 0; 731 732 /* And re-open it again */ 733 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 734 crq->msg_token, PAGE_SIZE); 735 736 if (rc == H_CLOSED) 737 /* Adapter is good, but other end is not ready */ 738 dev_warn(vhost->dev, "Partner adapter not ready\n"); 739 else if (rc != 0) 740 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 741 spin_unlock_irqrestore(vhost->host->host_lock, flags); 742 743 return rc; 744} 745 746/** 747 * ibmvfc_valid_event - Determines if event is valid. 748 * @pool: event_pool that contains the event 749 * @evt: ibmvfc event to be checked for validity 750 * 751 * Return value: 752 * 1 if event is valid / 0 if event is not valid 753 **/ 754static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 755 struct ibmvfc_event *evt) 756{ 757 int index = evt - pool->events; 758 if (index < 0 || index >= pool->size) /* outside of bounds */ 759 return 0; 760 if (evt != pool->events + index) /* unaligned */ 761 return 0; 762 return 1; 763} 764 765/** 766 * ibmvfc_free_event - Free the specified event 767 * @evt: ibmvfc_event to be freed 768 * 769 **/ 770static void ibmvfc_free_event(struct ibmvfc_event *evt) 771{ 772 struct ibmvfc_host *vhost = evt->vhost; 773 struct ibmvfc_event_pool *pool = &vhost->pool; 774 775 BUG_ON(!ibmvfc_valid_event(pool, evt)); 776 BUG_ON(atomic_inc_return(&evt->free) != 1); 777 list_add_tail(&evt->queue, &vhost->free); 778} 779 780/** 781 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 782 * @evt: ibmvfc event struct 783 * 784 * This function does not setup any error status, that must be done 785 * before this function gets called. 786 **/ 787static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 788{ 789 struct scsi_cmnd *cmnd = evt->cmnd; 790 791 if (cmnd) { 792 scsi_dma_unmap(cmnd); 793 cmnd->scsi_done(cmnd); 794 } 795 796 if (evt->eh_comp) 797 complete(evt->eh_comp); 798 799 ibmvfc_free_event(evt); 800} 801 802/** 803 * ibmvfc_fail_request - Fail request with specified error code 804 * @evt: ibmvfc event struct 805 * @error_code: error code to fail request with 806 * 807 * Return value: 808 * none 809 **/ 810static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 811{ 812 if (evt->cmnd) { 813 evt->cmnd->result = (error_code << 16); 814 evt->done = ibmvfc_scsi_eh_done; 815 } else 816 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; 817 818 list_del(&evt->queue); 819 del_timer(&evt->timer); 820 ibmvfc_trc_end(evt); 821 evt->done(evt); 822} 823 824/** 825 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 826 * @vhost: ibmvfc host struct 827 * @error_code: error code to fail requests with 828 * 829 * Return value: 830 * none 831 **/ 832static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 833{ 834 struct ibmvfc_event *evt, *pos; 835 836 ibmvfc_dbg(vhost, "Purging all requests\n"); 837 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 838 ibmvfc_fail_request(evt, error_code); 839} 840 841/** 842 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 843 * @vhost: struct ibmvfc host to reset 844 **/ 845static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 846{ 847 ibmvfc_purge_requests(vhost, DID_ERROR); 848 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 849 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 850} 851 852/** 853 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 854 * @vhost: struct ibmvfc host to reset 855 **/ 856static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 857{ 858 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 859 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 860 scsi_block_requests(vhost->host); 861 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 862 vhost->job_step = ibmvfc_npiv_logout; 863 wake_up(&vhost->work_wait_q); 864 } else 865 ibmvfc_hard_reset_host(vhost); 866} 867 868/** 869 * ibmvfc_reset_host - Reset the connection to the server 870 * @vhost: ibmvfc host struct 871 **/ 872static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 873{ 874 unsigned long flags; 875 876 spin_lock_irqsave(vhost->host->host_lock, flags); 877 __ibmvfc_reset_host(vhost); 878 spin_unlock_irqrestore(vhost->host->host_lock, flags); 879} 880 881/** 882 * ibmvfc_retry_host_init - Retry host initialization if allowed 883 * @vhost: ibmvfc host struct 884 * 885 * Returns: 1 if init will be retried / 0 if not 886 * 887 **/ 888static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 889{ 890 int retry = 0; 891 892 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 893 vhost->delay_init = 1; 894 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 895 dev_err(vhost->dev, 896 "Host initialization retries exceeded. Taking adapter offline\n"); 897 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 898 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 899 __ibmvfc_reset_host(vhost); 900 else { 901 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 902 retry = 1; 903 } 904 } 905 906 wake_up(&vhost->work_wait_q); 907 return retry; 908} 909 910/** 911 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 912 * @starget: scsi target struct 913 * 914 * Return value: 915 * ibmvfc_target struct / NULL if not found 916 **/ 917static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 918{ 919 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 920 struct ibmvfc_host *vhost = shost_priv(shost); 921 struct ibmvfc_target *tgt; 922 923 list_for_each_entry(tgt, &vhost->targets, queue) 924 if (tgt->target_id == starget->id) { 925 kref_get(&tgt->kref); 926 return tgt; 927 } 928 return NULL; 929} 930 931/** 932 * ibmvfc_get_target - Find the specified scsi_target 933 * @starget: scsi target struct 934 * 935 * Return value: 936 * ibmvfc_target struct / NULL if not found 937 **/ 938static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 939{ 940 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 941 struct ibmvfc_target *tgt; 942 unsigned long flags; 943 944 spin_lock_irqsave(shost->host_lock, flags); 945 tgt = __ibmvfc_get_target(starget); 946 spin_unlock_irqrestore(shost->host_lock, flags); 947 return tgt; 948} 949 950/** 951 * ibmvfc_get_host_speed - Get host port speed 952 * @shost: scsi host struct 953 * 954 * Return value: 955 * none 956 **/ 957static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 958{ 959 struct ibmvfc_host *vhost = shost_priv(shost); 960 unsigned long flags; 961 962 spin_lock_irqsave(shost->host_lock, flags); 963 if (vhost->state == IBMVFC_ACTIVE) { 964 switch (vhost->login_buf->resp.link_speed / 100) { 965 case 1: 966 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 967 break; 968 case 2: 969 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 970 break; 971 case 4: 972 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 973 break; 974 case 8: 975 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 976 break; 977 case 10: 978 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 979 break; 980 case 16: 981 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 982 break; 983 default: 984 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 985 vhost->login_buf->resp.link_speed / 100); 986 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 987 break; 988 } 989 } else 990 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 991 spin_unlock_irqrestore(shost->host_lock, flags); 992} 993 994/** 995 * ibmvfc_get_host_port_state - Get host port state 996 * @shost: scsi host struct 997 * 998 * Return value: 999 * none 1000 **/ 1001static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 1002{ 1003 struct ibmvfc_host *vhost = shost_priv(shost); 1004 unsigned long flags; 1005 1006 spin_lock_irqsave(shost->host_lock, flags); 1007 switch (vhost->state) { 1008 case IBMVFC_INITIALIZING: 1009 case IBMVFC_ACTIVE: 1010 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 1011 break; 1012 case IBMVFC_LINK_DOWN: 1013 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 1014 break; 1015 case IBMVFC_LINK_DEAD: 1016 case IBMVFC_HOST_OFFLINE: 1017 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1018 break; 1019 case IBMVFC_HALTED: 1020 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1021 break; 1022 case IBMVFC_NO_CRQ: 1023 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1024 break; 1025 default: 1026 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1027 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1028 break; 1029 } 1030 spin_unlock_irqrestore(shost->host_lock, flags); 1031} 1032 1033static void ibmvfc_set_host_def_dev_loss_tmo(struct Scsi_Host *shost) 1034{ 1035 fc_host_def_dev_loss_tmo(shost) = dev_loss_tmo; 1036} 1037 1038/** 1039 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1040 * @rport: rport struct 1041 * @timeout: timeout value 1042 * 1043 * Return value: 1044 * none 1045 **/ 1046static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1047{ 1048 if (timeout) 1049 rport->dev_loss_tmo = timeout; 1050 else 1051 rport->dev_loss_tmo = 1; 1052} 1053 1054/** 1055 * ibmvfc_release_tgt - Free memory allocated for a target 1056 * @kref: kref struct 1057 * 1058 **/ 1059static void ibmvfc_release_tgt(struct kref *kref) 1060{ 1061 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1062 kfree(tgt); 1063} 1064 1065/** 1066 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1067 * @starget: scsi target struct 1068 * 1069 * Return value: 1070 * none 1071 **/ 1072static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1073{ 1074 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1075 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1076 if (tgt) 1077 kref_put(&tgt->kref, ibmvfc_release_tgt); 1078} 1079 1080/** 1081 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1082 * @starget: scsi target struct 1083 * 1084 * Return value: 1085 * none 1086 **/ 1087static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1088{ 1089 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1090 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1091 if (tgt) 1092 kref_put(&tgt->kref, ibmvfc_release_tgt); 1093} 1094 1095/** 1096 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1097 * @starget: scsi target struct 1098 * 1099 * Return value: 1100 * none 1101 **/ 1102static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1103{ 1104 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1105 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1106 if (tgt) 1107 kref_put(&tgt->kref, ibmvfc_release_tgt); 1108} 1109 1110/** 1111 * ibmvfc_wait_while_resetting - Wait while the host resets 1112 * @vhost: ibmvfc host struct 1113 * 1114 * Return value: 1115 * 0 on success / other on failure 1116 **/ 1117static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1118{ 1119 long timeout = wait_event_timeout(vhost->init_wait_q, 1120 ((vhost->state == IBMVFC_ACTIVE || 1121 vhost->state == IBMVFC_HOST_OFFLINE || 1122 vhost->state == IBMVFC_LINK_DEAD) && 1123 vhost->action == IBMVFC_HOST_ACTION_NONE), 1124 (init_timeout * HZ)); 1125 1126 return timeout ? 0 : -EIO; 1127} 1128 1129/** 1130 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1131 * @shost: scsi host struct 1132 * 1133 * Return value: 1134 * 0 on success / other on failure 1135 **/ 1136static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1137{ 1138 struct ibmvfc_host *vhost = shost_priv(shost); 1139 1140 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1141 ibmvfc_reset_host(vhost); 1142 return ibmvfc_wait_while_resetting(vhost); 1143} 1144 1145/** 1146 * ibmvfc_gather_partition_info - Gather info about the LPAR 1147 * 1148 * Return value: 1149 * none 1150 **/ 1151static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1152{ 1153 struct device_node *rootdn; 1154 const char *name; 1155 const unsigned int *num; 1156 1157 rootdn = of_find_node_by_path("/"); 1158 if (!rootdn) 1159 return; 1160 1161 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1162 if (name) 1163 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1164 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1165 if (num) 1166 vhost->partition_number = *num; 1167 of_node_put(rootdn); 1168} 1169 1170/** 1171 * ibmvfc_set_login_info - Setup info for NPIV login 1172 * @vhost: ibmvfc host struct 1173 * 1174 * Return value: 1175 * none 1176 **/ 1177static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1178{ 1179 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1180 struct device_node *of_node = vhost->dev->of_node; 1181 const char *location; 1182 1183 memset(login_info, 0, sizeof(*login_info)); 1184 1185 login_info->ostype = IBMVFC_OS_LINUX; 1186 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; 1187 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); 1188 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); 1189 login_info->partition_num = vhost->partition_number; 1190 login_info->vfc_frame_version = 1; 1191 login_info->fcp_version = 3; 1192 login_info->flags = IBMVFC_FLUSH_ON_HALT; 1193 if (vhost->client_migrated) 1194 login_info->flags |= IBMVFC_CLIENT_MIGRATED; 1195 1196 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1197 login_info->capabilities = IBMVFC_CAN_MIGRATE; 1198 login_info->async.va = vhost->async_crq.msg_token; 1199 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); 1200 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1201 strncpy(login_info->device_name, 1202 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1203 1204 location = of_get_property(of_node, "ibm,loc-code", NULL); 1205 location = location ? location : dev_name(vhost->dev); 1206 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1207} 1208 1209/** 1210 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1211 * @vhost: ibmvfc host who owns the event pool 1212 * 1213 * Returns zero on success. 1214 **/ 1215static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1216{ 1217 int i; 1218 struct ibmvfc_event_pool *pool = &vhost->pool; 1219 1220 ENTER; 1221 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1222 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1223 if (!pool->events) 1224 return -ENOMEM; 1225 1226 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1227 pool->size * sizeof(*pool->iu_storage), 1228 &pool->iu_token, 0); 1229 1230 if (!pool->iu_storage) { 1231 kfree(pool->events); 1232 return -ENOMEM; 1233 } 1234 1235 for (i = 0; i < pool->size; ++i) { 1236 struct ibmvfc_event *evt = &pool->events[i]; 1237 atomic_set(&evt->free, 1); 1238 evt->crq.valid = 0x80; 1239 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); 1240 evt->xfer_iu = pool->iu_storage + i; 1241 evt->vhost = vhost; 1242 evt->ext_list = NULL; 1243 list_add_tail(&evt->queue, &vhost->free); 1244 } 1245 1246 LEAVE; 1247 return 0; 1248} 1249 1250/** 1251 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1252 * @vhost: ibmvfc host who owns the event pool 1253 * 1254 **/ 1255static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1256{ 1257 int i; 1258 struct ibmvfc_event_pool *pool = &vhost->pool; 1259 1260 ENTER; 1261 for (i = 0; i < pool->size; ++i) { 1262 list_del(&pool->events[i].queue); 1263 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1264 if (pool->events[i].ext_list) 1265 dma_pool_free(vhost->sg_pool, 1266 pool->events[i].ext_list, 1267 pool->events[i].ext_list_token); 1268 } 1269 1270 kfree(pool->events); 1271 dma_free_coherent(vhost->dev, 1272 pool->size * sizeof(*pool->iu_storage), 1273 pool->iu_storage, pool->iu_token); 1274 LEAVE; 1275} 1276 1277/** 1278 * ibmvfc_get_event - Gets the next free event in pool 1279 * @vhost: ibmvfc host struct 1280 * 1281 * Returns a free event from the pool. 1282 **/ 1283static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1284{ 1285 struct ibmvfc_event *evt; 1286 1287 BUG_ON(list_empty(&vhost->free)); 1288 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1289 atomic_set(&evt->free, 0); 1290 list_del(&evt->queue); 1291 return evt; 1292} 1293 1294/** 1295 * ibmvfc_init_event - Initialize fields in an event struct that are always 1296 * required. 1297 * @evt: The event 1298 * @done: Routine to call when the event is responded to 1299 * @format: SRP or MAD format 1300 **/ 1301static void ibmvfc_init_event(struct ibmvfc_event *evt, 1302 void (*done) (struct ibmvfc_event *), u8 format) 1303{ 1304 evt->cmnd = NULL; 1305 evt->sync_iu = NULL; 1306 evt->crq.format = format; 1307 evt->done = done; 1308 evt->eh_comp = NULL; 1309} 1310 1311/** 1312 * ibmvfc_map_sg_list - Initialize scatterlist 1313 * @scmd: scsi command struct 1314 * @nseg: number of scatterlist segments 1315 * @md: memory descriptor list to initialize 1316 **/ 1317static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1318 struct srp_direct_buf *md) 1319{ 1320 int i; 1321 struct scatterlist *sg; 1322 1323 scsi_for_each_sg(scmd, sg, nseg, i) { 1324 md[i].va = sg_dma_address(sg); 1325 md[i].len = sg_dma_len(sg); 1326 md[i].key = 0; 1327 } 1328} 1329 1330/** 1331 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1332 * @scmd: Scsi_Cmnd with the scatterlist 1333 * @evt: ibmvfc event struct 1334 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1335 * @dev: device for which to map dma memory 1336 * 1337 * Returns: 1338 * 0 on success / non-zero on failure 1339 **/ 1340static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1341 struct ibmvfc_event *evt, 1342 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1343{ 1344 1345 int sg_mapped; 1346 struct srp_direct_buf *data = &vfc_cmd->ioba; 1347 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1348 1349 sg_mapped = scsi_dma_map(scmd); 1350 if (!sg_mapped) { 1351 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; 1352 return 0; 1353 } else if (unlikely(sg_mapped < 0)) { 1354 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1355 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1356 return sg_mapped; 1357 } 1358 1359 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1360 vfc_cmd->flags |= IBMVFC_WRITE; 1361 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1362 } else { 1363 vfc_cmd->flags |= IBMVFC_READ; 1364 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1365 } 1366 1367 if (sg_mapped == 1) { 1368 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1369 return 0; 1370 } 1371 1372 vfc_cmd->flags |= IBMVFC_SCATTERLIST; 1373 1374 if (!evt->ext_list) { 1375 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1376 &evt->ext_list_token); 1377 1378 if (!evt->ext_list) { 1379 scsi_dma_unmap(scmd); 1380 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1381 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1382 return -ENOMEM; 1383 } 1384 } 1385 1386 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1387 1388 data->va = evt->ext_list_token; 1389 data->len = sg_mapped * sizeof(struct srp_direct_buf); 1390 data->key = 0; 1391 return 0; 1392} 1393 1394/** 1395 * ibmvfc_timeout - Internal command timeout handler 1396 * @evt: struct ibmvfc_event that timed out 1397 * 1398 * Called when an internally generated command times out 1399 **/ 1400static void ibmvfc_timeout(struct ibmvfc_event *evt) 1401{ 1402 struct ibmvfc_host *vhost = evt->vhost; 1403 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1404 ibmvfc_reset_host(vhost); 1405} 1406 1407/** 1408 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1409 * @evt: event to be sent 1410 * @vhost: ibmvfc host struct 1411 * @timeout: timeout in seconds - 0 means do not time command 1412 * 1413 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1414 **/ 1415static int ibmvfc_send_event(struct ibmvfc_event *evt, 1416 struct ibmvfc_host *vhost, unsigned long timeout) 1417{ 1418 u64 *crq_as_u64 = (u64 *) &evt->crq; 1419 int rc; 1420 1421 /* Copy the IU into the transfer area */ 1422 *evt->xfer_iu = evt->iu; 1423 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1424 evt->xfer_iu->cmd.tag = (u64)evt; 1425 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1426 evt->xfer_iu->mad_common.tag = (u64)evt; 1427 else 1428 BUG(); 1429 1430 list_add_tail(&evt->queue, &vhost->sent); 1431 init_timer(&evt->timer); 1432 1433 if (timeout) { 1434 evt->timer.data = (unsigned long) evt; 1435 evt->timer.expires = jiffies + (timeout * HZ); 1436 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; 1437 add_timer(&evt->timer); 1438 } 1439 1440 mb(); 1441 1442 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { 1443 list_del(&evt->queue); 1444 del_timer(&evt->timer); 1445 1446 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1447 * Firmware will send a CRQ with a transport event (0xFF) to 1448 * tell this client what has happened to the transport. This 1449 * will be handled in ibmvfc_handle_crq() 1450 */ 1451 if (rc == H_CLOSED) { 1452 if (printk_ratelimit()) 1453 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1454 if (evt->cmnd) 1455 scsi_dma_unmap(evt->cmnd); 1456 ibmvfc_free_event(evt); 1457 return SCSI_MLQUEUE_HOST_BUSY; 1458 } 1459 1460 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1461 if (evt->cmnd) { 1462 evt->cmnd->result = DID_ERROR << 16; 1463 evt->done = ibmvfc_scsi_eh_done; 1464 } else 1465 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; 1466 1467 evt->done(evt); 1468 } else 1469 ibmvfc_trc_start(evt); 1470 1471 return 0; 1472} 1473 1474/** 1475 * ibmvfc_log_error - Log an error for the failed command if appropriate 1476 * @evt: ibmvfc event to log 1477 * 1478 **/ 1479static void ibmvfc_log_error(struct ibmvfc_event *evt) 1480{ 1481 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1482 struct ibmvfc_host *vhost = evt->vhost; 1483 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1484 struct scsi_cmnd *cmnd = evt->cmnd; 1485 const char *err = unknown_error; 1486 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 1487 int logerr = 0; 1488 int rsp_code = 0; 1489 1490 if (index >= 0) { 1491 logerr = cmd_status[index].log; 1492 err = cmd_status[index].name; 1493 } 1494 1495 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1496 return; 1497 1498 if (rsp->flags & FCP_RSP_LEN_VALID) 1499 rsp_code = rsp->data.info.rsp_code; 1500 1501 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1502 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1503 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1504 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1505} 1506 1507/** 1508 * ibmvfc_relogin - Log back into the specified device 1509 * @sdev: scsi device struct 1510 * 1511 **/ 1512static void ibmvfc_relogin(struct scsi_device *sdev) 1513{ 1514 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1515 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1516 struct ibmvfc_target *tgt; 1517 1518 list_for_each_entry(tgt, &vhost->targets, queue) { 1519 if (rport == tgt->rport) { 1520 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 1521 break; 1522 } 1523 } 1524 1525 ibmvfc_reinit_host(vhost); 1526} 1527 1528/** 1529 * ibmvfc_scsi_done - Handle responses from commands 1530 * @evt: ibmvfc event to be handled 1531 * 1532 * Used as a callback when sending scsi cmds. 1533 **/ 1534static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1535{ 1536 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1537 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1538 struct scsi_cmnd *cmnd = evt->cmnd; 1539 u32 rsp_len = 0; 1540 u32 sense_len = rsp->fcp_sense_len; 1541 1542 if (cmnd) { 1543 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) 1544 scsi_set_resid(cmnd, vfc_cmd->adapter_resid); 1545 else if (rsp->flags & FCP_RESID_UNDER) 1546 scsi_set_resid(cmnd, rsp->fcp_resid); 1547 else 1548 scsi_set_resid(cmnd, 0); 1549 1550 if (vfc_cmd->status) { 1551 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1552 1553 if (rsp->flags & FCP_RSP_LEN_VALID) 1554 rsp_len = rsp->fcp_rsp_len; 1555 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1556 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1557 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1558 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1559 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED)) 1560 ibmvfc_relogin(cmnd->device); 1561 1562 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1563 cmnd->result = (DID_ERROR << 16); 1564 1565 ibmvfc_log_error(evt); 1566 } 1567 1568 if (!cmnd->result && 1569 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1570 cmnd->result = (DID_ERROR << 16); 1571 1572 scsi_dma_unmap(cmnd); 1573 cmnd->scsi_done(cmnd); 1574 } 1575 1576 if (evt->eh_comp) 1577 complete(evt->eh_comp); 1578 1579 ibmvfc_free_event(evt); 1580} 1581 1582/** 1583 * ibmvfc_host_chkready - Check if the host can accept commands 1584 * @vhost: struct ibmvfc host 1585 * 1586 * Returns: 1587 * 1 if host can accept command / 0 if not 1588 **/ 1589static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1590{ 1591 int result = 0; 1592 1593 switch (vhost->state) { 1594 case IBMVFC_LINK_DEAD: 1595 case IBMVFC_HOST_OFFLINE: 1596 result = DID_NO_CONNECT << 16; 1597 break; 1598 case IBMVFC_NO_CRQ: 1599 case IBMVFC_INITIALIZING: 1600 case IBMVFC_HALTED: 1601 case IBMVFC_LINK_DOWN: 1602 result = DID_REQUEUE << 16; 1603 break; 1604 case IBMVFC_ACTIVE: 1605 result = 0; 1606 break; 1607 }; 1608 1609 return result; 1610} 1611 1612/** 1613 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1614 * @cmnd: struct scsi_cmnd to be executed 1615 * @done: Callback function to be called when cmnd is completed 1616 * 1617 * Returns: 1618 * 0 on success / other on failure 1619 **/ 1620static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, 1621 void (*done) (struct scsi_cmnd *)) 1622{ 1623 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1624 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1625 struct ibmvfc_cmd *vfc_cmd; 1626 struct ibmvfc_event *evt; 1627 u8 tag[2]; 1628 int rc; 1629 1630 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1631 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1632 cmnd->result = rc; 1633 done(cmnd); 1634 return 0; 1635 } 1636 1637 cmnd->result = (DID_OK << 16); 1638 evt = ibmvfc_get_event(vhost); 1639 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1640 evt->cmnd = cmnd; 1641 cmnd->scsi_done = done; 1642 vfc_cmd = &evt->iu.cmd; 1643 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1644 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1645 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); 1646 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; 1647 vfc_cmd->payload_len = sizeof(vfc_cmd->iu); 1648 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); 1649 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; 1650 vfc_cmd->tgt_scsi_id = rport->port_id; 1651 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); 1652 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1653 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1654 1655 if (scsi_populate_tag_msg(cmnd, tag)) { 1656 vfc_cmd->task_tag = tag[1]; 1657 switch (tag[0]) { 1658 case MSG_SIMPLE_TAG: 1659 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1660 break; 1661 case MSG_HEAD_TAG: 1662 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; 1663 break; 1664 case MSG_ORDERED_TAG: 1665 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; 1666 break; 1667 }; 1668 } 1669 1670 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1671 return ibmvfc_send_event(evt, vhost, 0); 1672 1673 ibmvfc_free_event(evt); 1674 if (rc == -ENOMEM) 1675 return SCSI_MLQUEUE_HOST_BUSY; 1676 1677 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1678 scmd_printk(KERN_ERR, cmnd, 1679 "Failed to map DMA buffer for command. rc=%d\n", rc); 1680 1681 cmnd->result = DID_ERROR << 16; 1682 done(cmnd); 1683 return 0; 1684} 1685 1686/** 1687 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1688 * @evt: ibmvfc event struct 1689 * 1690 **/ 1691static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1692{ 1693 /* copy the response back */ 1694 if (evt->sync_iu) 1695 *evt->sync_iu = *evt->xfer_iu; 1696 1697 complete(&evt->comp); 1698} 1699 1700/** 1701 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 1702 * @evt: struct ibmvfc_event 1703 * 1704 **/ 1705static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 1706{ 1707 struct ibmvfc_host *vhost = evt->vhost; 1708 1709 ibmvfc_free_event(evt); 1710 vhost->aborting_passthru = 0; 1711 dev_info(vhost->dev, "Passthru command cancelled\n"); 1712} 1713 1714/** 1715 * ibmvfc_bsg_timeout - Handle a BSG timeout 1716 * @job: struct fc_bsg_job that timed out 1717 * 1718 * Returns: 1719 * 0 on success / other on failure 1720 **/ 1721static int ibmvfc_bsg_timeout(struct fc_bsg_job *job) 1722{ 1723 struct ibmvfc_host *vhost = shost_priv(job->shost); 1724 unsigned long port_id = (unsigned long)job->dd_data; 1725 struct ibmvfc_event *evt; 1726 struct ibmvfc_tmf *tmf; 1727 unsigned long flags; 1728 int rc; 1729 1730 ENTER; 1731 spin_lock_irqsave(vhost->host->host_lock, flags); 1732 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 1733 __ibmvfc_reset_host(vhost); 1734 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1735 return 0; 1736 } 1737 1738 vhost->aborting_passthru = 1; 1739 evt = ibmvfc_get_event(vhost); 1740 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 1741 1742 tmf = &evt->iu.tmf; 1743 memset(tmf, 0, sizeof(*tmf)); 1744 tmf->common.version = 1; 1745 tmf->common.opcode = IBMVFC_TMF_MAD; 1746 tmf->common.length = sizeof(*tmf); 1747 tmf->scsi_id = port_id; 1748 tmf->cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY; 1749 tmf->my_cancel_key = IBMVFC_INTERNAL_CANCEL_KEY; 1750 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1751 1752 if (rc != 0) { 1753 vhost->aborting_passthru = 0; 1754 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 1755 rc = -EIO; 1756 } else 1757 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 1758 port_id); 1759 1760 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1761 1762 LEAVE; 1763 return rc; 1764} 1765 1766/** 1767 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 1768 * @vhost: struct ibmvfc_host to send command 1769 * @port_id: port ID to send command 1770 * 1771 * Returns: 1772 * 0 on success / other on failure 1773 **/ 1774static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 1775{ 1776 struct ibmvfc_port_login *plogi; 1777 struct ibmvfc_target *tgt; 1778 struct ibmvfc_event *evt; 1779 union ibmvfc_iu rsp_iu; 1780 unsigned long flags; 1781 int rc = 0, issue_login = 1; 1782 1783 ENTER; 1784 spin_lock_irqsave(vhost->host->host_lock, flags); 1785 list_for_each_entry(tgt, &vhost->targets, queue) { 1786 if (tgt->scsi_id == port_id) { 1787 issue_login = 0; 1788 break; 1789 } 1790 } 1791 1792 if (!issue_login) 1793 goto unlock_out; 1794 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 1795 goto unlock_out; 1796 1797 evt = ibmvfc_get_event(vhost); 1798 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1799 plogi = &evt->iu.plogi; 1800 memset(plogi, 0, sizeof(*plogi)); 1801 plogi->common.version = 1; 1802 plogi->common.opcode = IBMVFC_PORT_LOGIN; 1803 plogi->common.length = sizeof(*plogi); 1804 plogi->scsi_id = port_id; 1805 evt->sync_iu = &rsp_iu; 1806 init_completion(&evt->comp); 1807 1808 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1809 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1810 1811 if (rc) 1812 return -EIO; 1813 1814 wait_for_completion(&evt->comp); 1815 1816 if (rsp_iu.plogi.common.status) 1817 rc = -EIO; 1818 1819 spin_lock_irqsave(vhost->host->host_lock, flags); 1820 ibmvfc_free_event(evt); 1821unlock_out: 1822 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1823 LEAVE; 1824 return rc; 1825} 1826 1827/** 1828 * ibmvfc_bsg_request - Handle a BSG request 1829 * @job: struct fc_bsg_job to be executed 1830 * 1831 * Returns: 1832 * 0 on success / other on failure 1833 **/ 1834static int ibmvfc_bsg_request(struct fc_bsg_job *job) 1835{ 1836 struct ibmvfc_host *vhost = shost_priv(job->shost); 1837 struct fc_rport *rport = job->rport; 1838 struct ibmvfc_passthru_mad *mad; 1839 struct ibmvfc_event *evt; 1840 union ibmvfc_iu rsp_iu; 1841 unsigned long flags, port_id = -1; 1842 unsigned int code = job->request->msgcode; 1843 int rc = 0, req_seg, rsp_seg, issue_login = 0; 1844 u32 fc_flags, rsp_len; 1845 1846 ENTER; 1847 job->reply->reply_payload_rcv_len = 0; 1848 if (rport) 1849 port_id = rport->port_id; 1850 1851 switch (code) { 1852 case FC_BSG_HST_ELS_NOLOGIN: 1853 port_id = (job->request->rqst_data.h_els.port_id[0] << 16) | 1854 (job->request->rqst_data.h_els.port_id[1] << 8) | 1855 job->request->rqst_data.h_els.port_id[2]; 1856 case FC_BSG_RPT_ELS: 1857 fc_flags = IBMVFC_FC_ELS; 1858 break; 1859 case FC_BSG_HST_CT: 1860 issue_login = 1; 1861 port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) | 1862 (job->request->rqst_data.h_ct.port_id[1] << 8) | 1863 job->request->rqst_data.h_ct.port_id[2]; 1864 case FC_BSG_RPT_CT: 1865 fc_flags = IBMVFC_FC_CT_IU; 1866 break; 1867 default: 1868 return -ENOTSUPP; 1869 }; 1870 1871 if (port_id == -1) 1872 return -EINVAL; 1873 if (!mutex_trylock(&vhost->passthru_mutex)) 1874 return -EBUSY; 1875 1876 job->dd_data = (void *)port_id; 1877 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 1878 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1879 1880 if (!req_seg) { 1881 mutex_unlock(&vhost->passthru_mutex); 1882 return -ENOMEM; 1883 } 1884 1885 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 1886 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1887 1888 if (!rsp_seg) { 1889 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1890 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1891 mutex_unlock(&vhost->passthru_mutex); 1892 return -ENOMEM; 1893 } 1894 1895 if (req_seg > 1 || rsp_seg > 1) { 1896 rc = -EINVAL; 1897 goto out; 1898 } 1899 1900 if (issue_login) 1901 rc = ibmvfc_bsg_plogi(vhost, port_id); 1902 1903 spin_lock_irqsave(vhost->host->host_lock, flags); 1904 1905 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 1906 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1907 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1908 goto out; 1909 } 1910 1911 evt = ibmvfc_get_event(vhost); 1912 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1913 mad = &evt->iu.passthru; 1914 1915 memset(mad, 0, sizeof(*mad)); 1916 mad->common.version = 1; 1917 mad->common.opcode = IBMVFC_PASSTHRU; 1918 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 1919 1920 mad->cmd_ioba.va = (u64)evt->crq.ioba + 1921 offsetof(struct ibmvfc_passthru_mad, iu); 1922 mad->cmd_ioba.len = sizeof(mad->iu); 1923 1924 mad->iu.cmd_len = job->request_payload.payload_len; 1925 mad->iu.rsp_len = job->reply_payload.payload_len; 1926 mad->iu.flags = fc_flags; 1927 mad->iu.cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY; 1928 1929 mad->iu.cmd.va = sg_dma_address(job->request_payload.sg_list); 1930 mad->iu.cmd.len = sg_dma_len(job->request_payload.sg_list); 1931 mad->iu.rsp.va = sg_dma_address(job->reply_payload.sg_list); 1932 mad->iu.rsp.len = sg_dma_len(job->reply_payload.sg_list); 1933 mad->iu.scsi_id = port_id; 1934 mad->iu.tag = (u64)evt; 1935 rsp_len = mad->iu.rsp.len; 1936 1937 evt->sync_iu = &rsp_iu; 1938 init_completion(&evt->comp); 1939 rc = ibmvfc_send_event(evt, vhost, 0); 1940 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1941 1942 if (rc) { 1943 rc = -EIO; 1944 goto out; 1945 } 1946 1947 wait_for_completion(&evt->comp); 1948 1949 if (rsp_iu.passthru.common.status) 1950 rc = -EIO; 1951 else 1952 job->reply->reply_payload_rcv_len = rsp_len; 1953 1954 spin_lock_irqsave(vhost->host->host_lock, flags); 1955 ibmvfc_free_event(evt); 1956 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1957 job->reply->result = rc; 1958 job->job_done(job); 1959 rc = 0; 1960out: 1961 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1962 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1963 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 1964 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1965 mutex_unlock(&vhost->passthru_mutex); 1966 LEAVE; 1967 return rc; 1968} 1969 1970/** 1971 * ibmvfc_reset_device - Reset the device with the specified reset type 1972 * @sdev: scsi device to reset 1973 * @type: reset type 1974 * @desc: reset type description for log messages 1975 * 1976 * Returns: 1977 * 0 on success / other on failure 1978 **/ 1979static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1980{ 1981 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1982 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1983 struct ibmvfc_cmd *tmf; 1984 struct ibmvfc_event *evt = NULL; 1985 union ibmvfc_iu rsp_iu; 1986 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1987 int rsp_rc = -EBUSY; 1988 unsigned long flags; 1989 int rsp_code = 0; 1990 1991 spin_lock_irqsave(vhost->host->host_lock, flags); 1992 if (vhost->state == IBMVFC_ACTIVE) { 1993 evt = ibmvfc_get_event(vhost); 1994 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1995 1996 tmf = &evt->iu.cmd; 1997 memset(tmf, 0, sizeof(*tmf)); 1998 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1999 tmf->resp.len = sizeof(tmf->rsp); 2000 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 2001 tmf->payload_len = sizeof(tmf->iu); 2002 tmf->resp_len = sizeof(tmf->rsp); 2003 tmf->cancel_key = (unsigned long)sdev->hostdata; 2004 tmf->tgt_scsi_id = rport->port_id; 2005 int_to_scsilun(sdev->lun, &tmf->iu.lun); 2006 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 2007 tmf->iu.tmf_flags = type; 2008 evt->sync_iu = &rsp_iu; 2009 2010 init_completion(&evt->comp); 2011 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2012 } 2013 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2014 2015 if (rsp_rc != 0) { 2016 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 2017 desc, rsp_rc); 2018 return -EIO; 2019 } 2020 2021 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2022 wait_for_completion(&evt->comp); 2023 2024 if (rsp_iu.cmd.status) 2025 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2026 2027 if (rsp_code) { 2028 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2029 rsp_code = fc_rsp->data.info.rsp_code; 2030 2031 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2032 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2033 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 2034 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2035 fc_rsp->scsi_status); 2036 rsp_rc = -EIO; 2037 } else 2038 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2039 2040 spin_lock_irqsave(vhost->host->host_lock, flags); 2041 ibmvfc_free_event(evt); 2042 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2043 return rsp_rc; 2044} 2045 2046/** 2047 * ibmvfc_match_rport - Match function for specified remote port 2048 * @evt: ibmvfc event struct 2049 * @device: device to match (rport) 2050 * 2051 * Returns: 2052 * 1 if event matches rport / 0 if event does not match rport 2053 **/ 2054static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2055{ 2056 struct fc_rport *cmd_rport; 2057 2058 if (evt->cmnd) { 2059 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2060 if (cmd_rport == rport) 2061 return 1; 2062 } 2063 return 0; 2064} 2065 2066/** 2067 * ibmvfc_match_target - Match function for specified target 2068 * @evt: ibmvfc event struct 2069 * @device: device to match (starget) 2070 * 2071 * Returns: 2072 * 1 if event matches starget / 0 if event does not match starget 2073 **/ 2074static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2075{ 2076 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2077 return 1; 2078 return 0; 2079} 2080 2081/** 2082 * ibmvfc_match_lun - Match function for specified LUN 2083 * @evt: ibmvfc event struct 2084 * @device: device to match (sdev) 2085 * 2086 * Returns: 2087 * 1 if event matches sdev / 0 if event does not match sdev 2088 **/ 2089static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2090{ 2091 if (evt->cmnd && evt->cmnd->device == device) 2092 return 1; 2093 return 0; 2094} 2095 2096/** 2097 * ibmvfc_wait_for_ops - Wait for ops to complete 2098 * @vhost: ibmvfc host struct 2099 * @device: device to match (starget or sdev) 2100 * @match: match function 2101 * 2102 * Returns: 2103 * SUCCESS / FAILED 2104 **/ 2105static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2106 int (*match) (struct ibmvfc_event *, void *)) 2107{ 2108 struct ibmvfc_event *evt; 2109 DECLARE_COMPLETION_ONSTACK(comp); 2110 int wait; 2111 unsigned long flags; 2112 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2113 2114 ENTER; 2115 do { 2116 wait = 0; 2117 spin_lock_irqsave(vhost->host->host_lock, flags); 2118 list_for_each_entry(evt, &vhost->sent, queue) { 2119 if (match(evt, device)) { 2120 evt->eh_comp = ∁ 2121 wait++; 2122 } 2123 } 2124 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2125 2126 if (wait) { 2127 timeout = wait_for_completion_timeout(&comp, timeout); 2128 2129 if (!timeout) { 2130 wait = 0; 2131 spin_lock_irqsave(vhost->host->host_lock, flags); 2132 list_for_each_entry(evt, &vhost->sent, queue) { 2133 if (match(evt, device)) { 2134 evt->eh_comp = NULL; 2135 wait++; 2136 } 2137 } 2138 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2139 if (wait) 2140 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2141 LEAVE; 2142 return wait ? FAILED : SUCCESS; 2143 } 2144 } 2145 } while (wait); 2146 2147 LEAVE; 2148 return SUCCESS; 2149} 2150 2151/** 2152 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2153 * @sdev: scsi device to cancel commands 2154 * @type: type of error recovery being performed 2155 * 2156 * This sends a cancel to the VIOS for the specified device. This does 2157 * NOT send any abort to the actual device. That must be done separately. 2158 * 2159 * Returns: 2160 * 0 on success / other on failure 2161 **/ 2162static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2163{ 2164 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2165 struct scsi_target *starget = scsi_target(sdev); 2166 struct fc_rport *rport = starget_to_rport(starget); 2167 struct ibmvfc_tmf *tmf; 2168 struct ibmvfc_event *evt, *found_evt; 2169 union ibmvfc_iu rsp; 2170 int rsp_rc = -EBUSY; 2171 unsigned long flags; 2172 u16 status; 2173 2174 ENTER; 2175 spin_lock_irqsave(vhost->host->host_lock, flags); 2176 found_evt = NULL; 2177 list_for_each_entry(evt, &vhost->sent, queue) { 2178 if (evt->cmnd && evt->cmnd->device == sdev) { 2179 found_evt = evt; 2180 break; 2181 } 2182 } 2183 2184 if (!found_evt) { 2185 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2186 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2187 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2188 return 0; 2189 } 2190 2191 if (vhost->state == IBMVFC_ACTIVE) { 2192 evt = ibmvfc_get_event(vhost); 2193 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2194 2195 tmf = &evt->iu.tmf; 2196 memset(tmf, 0, sizeof(*tmf)); 2197 tmf->common.version = 1; 2198 tmf->common.opcode = IBMVFC_TMF_MAD; 2199 tmf->common.length = sizeof(*tmf); 2200 tmf->scsi_id = rport->port_id; 2201 int_to_scsilun(sdev->lun, &tmf->lun); 2202 tmf->flags = (type | IBMVFC_TMF_LUA_VALID); 2203 tmf->cancel_key = (unsigned long)sdev->hostdata; 2204 tmf->my_cancel_key = (unsigned long)starget->hostdata; 2205 2206 evt->sync_iu = &rsp; 2207 init_completion(&evt->comp); 2208 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2209 } 2210 2211 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2212 2213 if (rsp_rc != 0) { 2214 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2215 return -EIO; 2216 } 2217 2218 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2219 2220 wait_for_completion(&evt->comp); 2221 status = 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 return -EIO; 2229 } 2230 2231 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2232 return 0; 2233} 2234 2235/** 2236 * ibmvfc_match_key - Match function for specified cancel key 2237 * @evt: ibmvfc event struct 2238 * @key: cancel key to match 2239 * 2240 * Returns: 2241 * 1 if event matches key / 0 if event does not match key 2242 **/ 2243static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2244{ 2245 unsigned long cancel_key = (unsigned long)key; 2246 2247 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2248 evt->iu.cmd.cancel_key == cancel_key) 2249 return 1; 2250 return 0; 2251} 2252 2253/** 2254 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2255 * @sdev: scsi device to abort commands 2256 * 2257 * This sends an Abort Task Set to the VIOS for the specified device. This does 2258 * NOT send any cancel to the VIOS. That must be done separately. 2259 * 2260 * Returns: 2261 * 0 on success / other on failure 2262 **/ 2263static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2264{ 2265 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2266 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2267 struct ibmvfc_cmd *tmf; 2268 struct ibmvfc_event *evt, *found_evt; 2269 union ibmvfc_iu rsp_iu; 2270 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 2271 int rc, rsp_rc = -EBUSY; 2272 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2273 int rsp_code = 0; 2274 2275 spin_lock_irqsave(vhost->host->host_lock, flags); 2276 found_evt = NULL; 2277 list_for_each_entry(evt, &vhost->sent, queue) { 2278 if (evt->cmnd && evt->cmnd->device == sdev) { 2279 found_evt = evt; 2280 break; 2281 } 2282 } 2283 2284 if (!found_evt) { 2285 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2286 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2287 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2288 return 0; 2289 } 2290 2291 if (vhost->state == IBMVFC_ACTIVE) { 2292 evt = ibmvfc_get_event(vhost); 2293 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2294 2295 tmf = &evt->iu.cmd; 2296 memset(tmf, 0, sizeof(*tmf)); 2297 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 2298 tmf->resp.len = sizeof(tmf->rsp); 2299 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 2300 tmf->payload_len = sizeof(tmf->iu); 2301 tmf->resp_len = sizeof(tmf->rsp); 2302 tmf->cancel_key = (unsigned long)sdev->hostdata; 2303 tmf->tgt_scsi_id = rport->port_id; 2304 int_to_scsilun(sdev->lun, &tmf->iu.lun); 2305 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 2306 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 2307 evt->sync_iu = &rsp_iu; 2308 2309 init_completion(&evt->comp); 2310 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2311 } 2312 2313 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2314 2315 if (rsp_rc != 0) { 2316 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2317 return -EIO; 2318 } 2319 2320 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2321 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2322 2323 if (!timeout) { 2324 rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2325 if (!rc) { 2326 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2327 if (rc == SUCCESS) 2328 rc = 0; 2329 } 2330 2331 if (rc) { 2332 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2333 ibmvfc_reset_host(vhost); 2334 rsp_rc = 0; 2335 goto out; 2336 } 2337 } 2338 2339 if (rsp_iu.cmd.status) 2340 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2341 2342 if (rsp_code) { 2343 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2344 rsp_code = fc_rsp->data.info.rsp_code; 2345 2346 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2347 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2348 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 2349 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2350 fc_rsp->scsi_status); 2351 rsp_rc = -EIO; 2352 } else 2353 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2354 2355out: 2356 spin_lock_irqsave(vhost->host->host_lock, flags); 2357 ibmvfc_free_event(evt); 2358 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2359 return rsp_rc; 2360} 2361 2362/** 2363 * ibmvfc_eh_abort_handler - Abort a command 2364 * @cmd: scsi command to abort 2365 * 2366 * Returns: 2367 * SUCCESS / FAILED 2368 **/ 2369static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2370{ 2371 struct scsi_device *sdev = cmd->device; 2372 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2373 int cancel_rc, abort_rc; 2374 int rc = FAILED; 2375 2376 ENTER; 2377 fc_block_scsi_eh(cmd); 2378 ibmvfc_wait_while_resetting(vhost); 2379 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2380 abort_rc = ibmvfc_abort_task_set(sdev); 2381 2382 if (!cancel_rc && !abort_rc) 2383 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2384 2385 LEAVE; 2386 return rc; 2387} 2388 2389/** 2390 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2391 * @cmd: scsi command struct 2392 * 2393 * Returns: 2394 * SUCCESS / FAILED 2395 **/ 2396static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2397{ 2398 struct scsi_device *sdev = cmd->device; 2399 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2400 int cancel_rc, reset_rc; 2401 int rc = FAILED; 2402 2403 ENTER; 2404 fc_block_scsi_eh(cmd); 2405 ibmvfc_wait_while_resetting(vhost); 2406 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2407 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2408 2409 if (!cancel_rc && !reset_rc) 2410 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2411 2412 LEAVE; 2413 return rc; 2414} 2415 2416/** 2417 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2418 * @sdev: scsi device struct 2419 * @data: return code 2420 * 2421 **/ 2422static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2423{ 2424 unsigned long *rc = data; 2425 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2426} 2427 2428/** 2429 * ibmvfc_eh_target_reset_handler - Reset the target 2430 * @cmd: scsi command struct 2431 * 2432 * Returns: 2433 * SUCCESS / FAILED 2434 **/ 2435static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2436{ 2437 struct scsi_device *sdev = cmd->device; 2438 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2439 struct scsi_target *starget = scsi_target(sdev); 2440 int reset_rc; 2441 int rc = FAILED; 2442 unsigned long cancel_rc = 0; 2443 2444 ENTER; 2445 fc_block_scsi_eh(cmd); 2446 ibmvfc_wait_while_resetting(vhost); 2447 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2448 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2449 2450 if (!cancel_rc && !reset_rc) 2451 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2452 2453 LEAVE; 2454 return rc; 2455} 2456 2457/** 2458 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2459 * @cmd: struct scsi_cmnd having problems 2460 * 2461 **/ 2462static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2463{ 2464 int rc; 2465 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2466 2467 fc_block_scsi_eh(cmd); 2468 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2469 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2470 return rc ? FAILED : SUCCESS; 2471} 2472 2473/** 2474 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2475 * @rport: rport struct 2476 * 2477 * Return value: 2478 * none 2479 **/ 2480static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2481{ 2482 struct Scsi_Host *shost = rport_to_shost(rport); 2483 struct ibmvfc_host *vhost = shost_priv(shost); 2484 struct fc_rport *dev_rport; 2485 struct scsi_device *sdev; 2486 unsigned long rc; 2487 2488 ENTER; 2489 shost_for_each_device(sdev, shost) { 2490 dev_rport = starget_to_rport(scsi_target(sdev)); 2491 if (dev_rport != rport) 2492 continue; 2493 ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2494 ibmvfc_abort_task_set(sdev); 2495 } 2496 2497 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 2498 2499 if (rc == FAILED) 2500 ibmvfc_issue_fc_host_lip(shost); 2501 LEAVE; 2502} 2503 2504static const struct ibmvfc_async_desc ae_desc [] = { 2505 { IBMVFC_AE_ELS_PLOGI, "PLOGI", IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2506 { IBMVFC_AE_ELS_LOGO, "LOGO", IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2507 { IBMVFC_AE_ELS_PRLO, "PRLO", IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2508 { IBMVFC_AE_SCN_NPORT, "N-Port SCN", IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2509 { IBMVFC_AE_SCN_GROUP, "Group SCN", IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2510 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN", IBMVFC_DEFAULT_LOG_LEVEL }, 2511 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN", IBMVFC_DEFAULT_LOG_LEVEL }, 2512 { IBMVFC_AE_LINK_UP, "Link Up", IBMVFC_DEFAULT_LOG_LEVEL }, 2513 { IBMVFC_AE_LINK_DOWN, "Link Down", IBMVFC_DEFAULT_LOG_LEVEL }, 2514 { IBMVFC_AE_LINK_DEAD, "Link Dead", IBMVFC_DEFAULT_LOG_LEVEL }, 2515 { IBMVFC_AE_HALT, "Halt", IBMVFC_DEFAULT_LOG_LEVEL }, 2516 { IBMVFC_AE_RESUME, "Resume", IBMVFC_DEFAULT_LOG_LEVEL }, 2517 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed", IBMVFC_DEFAULT_LOG_LEVEL }, 2518}; 2519 2520static const struct ibmvfc_async_desc unknown_ae = { 2521 0, "Unknown async", IBMVFC_DEFAULT_LOG_LEVEL 2522}; 2523 2524/** 2525 * ibmvfc_get_ae_desc - Get text description for async event 2526 * @ae: async event 2527 * 2528 **/ 2529static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 2530{ 2531 int i; 2532 2533 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2534 if (ae_desc[i].ae == ae) 2535 return &ae_desc[i]; 2536 2537 return &unknown_ae; 2538} 2539 2540static const struct { 2541 enum ibmvfc_ae_link_state state; 2542 const char *desc; 2543} link_desc [] = { 2544 { IBMVFC_AE_LS_LINK_UP, " link up" }, 2545 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 2546 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 2547 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 2548}; 2549 2550/** 2551 * ibmvfc_get_link_state - Get text description for link state 2552 * @state: link state 2553 * 2554 **/ 2555static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 2556{ 2557 int i; 2558 2559 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 2560 if (link_desc[i].state == state) 2561 return link_desc[i].desc; 2562 2563 return ""; 2564} 2565 2566/** 2567 * ibmvfc_handle_async - Handle an async event from the adapter 2568 * @crq: crq to process 2569 * @vhost: ibmvfc host struct 2570 * 2571 **/ 2572static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2573 struct ibmvfc_host *vhost) 2574{ 2575 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(crq->event); 2576 struct ibmvfc_target *tgt; 2577 2578 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 2579 " node_name: %llx%s\n", desc->desc, crq->scsi_id, crq->wwpn, crq->node_name, 2580 ibmvfc_get_link_state(crq->link_state)); 2581 2582 switch (crq->event) { 2583 case IBMVFC_AE_RESUME: 2584 switch (crq->link_state) { 2585 case IBMVFC_AE_LS_LINK_DOWN: 2586 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2587 break; 2588 case IBMVFC_AE_LS_LINK_DEAD: 2589 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2590 break; 2591 case IBMVFC_AE_LS_LINK_UP: 2592 case IBMVFC_AE_LS_LINK_BOUNCED: 2593 default: 2594 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2595 vhost->delay_init = 1; 2596 __ibmvfc_reset_host(vhost); 2597 break; 2598 }; 2599 2600 break; 2601 case IBMVFC_AE_LINK_UP: 2602 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2603 vhost->delay_init = 1; 2604 __ibmvfc_reset_host(vhost); 2605 break; 2606 case IBMVFC_AE_SCN_FABRIC: 2607 case IBMVFC_AE_SCN_DOMAIN: 2608 vhost->events_to_log |= IBMVFC_AE_RSCN; 2609 vhost->delay_init = 1; 2610 __ibmvfc_reset_host(vhost); 2611 break; 2612 case IBMVFC_AE_SCN_NPORT: 2613 case IBMVFC_AE_SCN_GROUP: 2614 vhost->events_to_log |= IBMVFC_AE_RSCN; 2615 ibmvfc_reinit_host(vhost); 2616 break; 2617 case IBMVFC_AE_ELS_LOGO: 2618 case IBMVFC_AE_ELS_PRLO: 2619 case IBMVFC_AE_ELS_PLOGI: 2620 list_for_each_entry(tgt, &vhost->targets, queue) { 2621 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 2622 break; 2623 if (crq->scsi_id && tgt->scsi_id != crq->scsi_id) 2624 continue; 2625 if (crq->wwpn && tgt->ids.port_name != crq->wwpn) 2626 continue; 2627 if (crq->node_name && tgt->ids.node_name != crq->node_name) 2628 continue; 2629 if (tgt->need_login && crq->event == IBMVFC_AE_ELS_LOGO) 2630 tgt->logo_rcvd = 1; 2631 if (!tgt->need_login || crq->event == IBMVFC_AE_ELS_PLOGI) { 2632 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2633 ibmvfc_reinit_host(vhost); 2634 } 2635 } 2636 break; 2637 case IBMVFC_AE_LINK_DOWN: 2638 case IBMVFC_AE_ADAPTER_FAILED: 2639 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2640 break; 2641 case IBMVFC_AE_LINK_DEAD: 2642 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2643 break; 2644 case IBMVFC_AE_HALT: 2645 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2646 break; 2647 default: 2648 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2649 break; 2650 }; 2651} 2652 2653/** 2654 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2655 * @crq: Command/Response queue 2656 * @vhost: ibmvfc host struct 2657 * 2658 **/ 2659static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2660{ 2661 long rc; 2662 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; 2663 2664 switch (crq->valid) { 2665 case IBMVFC_CRQ_INIT_RSP: 2666 switch (crq->format) { 2667 case IBMVFC_CRQ_INIT: 2668 dev_info(vhost->dev, "Partner initialized\n"); 2669 /* Send back a response */ 2670 rc = ibmvfc_send_crq_init_complete(vhost); 2671 if (rc == 0) 2672 ibmvfc_init_host(vhost); 2673 else 2674 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2675 break; 2676 case IBMVFC_CRQ_INIT_COMPLETE: 2677 dev_info(vhost->dev, "Partner initialization complete\n"); 2678 ibmvfc_init_host(vhost); 2679 break; 2680 default: 2681 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2682 } 2683 return; 2684 case IBMVFC_CRQ_XPORT_EVENT: 2685 vhost->state = IBMVFC_NO_CRQ; 2686 vhost->logged_in = 0; 2687 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2688 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2689 /* We need to re-setup the interpartition connection */ 2690 dev_info(vhost->dev, "Re-enabling adapter\n"); 2691 vhost->client_migrated = 1; 2692 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2693 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2694 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 2695 } else { 2696 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2697 ibmvfc_purge_requests(vhost, DID_ERROR); 2698 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2699 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 2700 } 2701 return; 2702 case IBMVFC_CRQ_CMD_RSP: 2703 break; 2704 default: 2705 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2706 return; 2707 } 2708 2709 if (crq->format == IBMVFC_ASYNC_EVENT) 2710 return; 2711 2712 /* The only kind of payload CRQs we should get are responses to 2713 * things we send. Make sure this response is to something we 2714 * actually sent 2715 */ 2716 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2717 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2718 crq->ioba); 2719 return; 2720 } 2721 2722 if (unlikely(atomic_read(&evt->free))) { 2723 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2724 crq->ioba); 2725 return; 2726 } 2727 2728 del_timer(&evt->timer); 2729 list_del(&evt->queue); 2730 ibmvfc_trc_end(evt); 2731 evt->done(evt); 2732} 2733 2734/** 2735 * ibmvfc_scan_finished - Check if the device scan is done. 2736 * @shost: scsi host struct 2737 * @time: current elapsed time 2738 * 2739 * Returns: 2740 * 0 if scan is not done / 1 if scan is done 2741 **/ 2742static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2743{ 2744 unsigned long flags; 2745 struct ibmvfc_host *vhost = shost_priv(shost); 2746 int done = 0; 2747 2748 spin_lock_irqsave(shost->host_lock, flags); 2749 if (time >= (init_timeout * HZ)) { 2750 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2751 "continuing initialization\n", init_timeout); 2752 done = 1; 2753 } 2754 2755 if (vhost->scan_complete) 2756 done = 1; 2757 spin_unlock_irqrestore(shost->host_lock, flags); 2758 return done; 2759} 2760 2761/** 2762 * ibmvfc_slave_alloc - Setup the device's task set value 2763 * @sdev: struct scsi_device device to configure 2764 * 2765 * Set the device's task set value so that error handling works as 2766 * expected. 2767 * 2768 * Returns: 2769 * 0 on success / -ENXIO if device does not exist 2770 **/ 2771static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2772{ 2773 struct Scsi_Host *shost = sdev->host; 2774 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2775 struct ibmvfc_host *vhost = shost_priv(shost); 2776 unsigned long flags = 0; 2777 2778 if (!rport || fc_remote_port_chkready(rport)) 2779 return -ENXIO; 2780 2781 spin_lock_irqsave(shost->host_lock, flags); 2782 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2783 spin_unlock_irqrestore(shost->host_lock, flags); 2784 return 0; 2785} 2786 2787/** 2788 * ibmvfc_target_alloc - Setup the target's task set value 2789 * @starget: struct scsi_target 2790 * 2791 * Set the target's task set value so that error handling works as 2792 * expected. 2793 * 2794 * Returns: 2795 * 0 on success / -ENXIO if device does not exist 2796 **/ 2797static int ibmvfc_target_alloc(struct scsi_target *starget) 2798{ 2799 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2800 struct ibmvfc_host *vhost = shost_priv(shost); 2801 unsigned long flags = 0; 2802 2803 spin_lock_irqsave(shost->host_lock, flags); 2804 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2805 spin_unlock_irqrestore(shost->host_lock, flags); 2806 return 0; 2807} 2808 2809/** 2810 * ibmvfc_slave_configure - Configure the device 2811 * @sdev: struct scsi_device device to configure 2812 * 2813 * Enable allow_restart for a device if it is a disk. Adjust the 2814 * queue_depth here also. 2815 * 2816 * Returns: 2817 * 0 2818 **/ 2819static int ibmvfc_slave_configure(struct scsi_device *sdev) 2820{ 2821 struct Scsi_Host *shost = sdev->host; 2822 unsigned long flags = 0; 2823 2824 spin_lock_irqsave(shost->host_lock, flags); 2825 if (sdev->type == TYPE_DISK) 2826 sdev->allow_restart = 1; 2827 2828 if (sdev->tagged_supported) { 2829 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 2830 scsi_activate_tcq(sdev, sdev->queue_depth); 2831 } else 2832 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2833 spin_unlock_irqrestore(shost->host_lock, flags); 2834 return 0; 2835} 2836 2837/** 2838 * ibmvfc_change_queue_depth - Change the device's queue depth 2839 * @sdev: scsi device struct 2840 * @qdepth: depth to set 2841 * @reason: calling context 2842 * 2843 * Return value: 2844 * actual depth set 2845 **/ 2846static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth, 2847 int reason) 2848{ 2849 if (reason != SCSI_QDEPTH_DEFAULT) 2850 return -EOPNOTSUPP; 2851 2852 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2853 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2854 2855 scsi_adjust_queue_depth(sdev, 0, qdepth); 2856 return sdev->queue_depth; 2857} 2858 2859/** 2860 * ibmvfc_change_queue_type - Change the device's queue type 2861 * @sdev: scsi device struct 2862 * @tag_type: type of tags to use 2863 * 2864 * Return value: 2865 * actual queue type set 2866 **/ 2867static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) 2868{ 2869 if (sdev->tagged_supported) { 2870 scsi_set_tag_type(sdev, tag_type); 2871 2872 if (tag_type) 2873 scsi_activate_tcq(sdev, sdev->queue_depth); 2874 else 2875 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2876 } else 2877 tag_type = 0; 2878 2879 return tag_type; 2880} 2881 2882static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2883 struct device_attribute *attr, char *buf) 2884{ 2885 struct Scsi_Host *shost = class_to_shost(dev); 2886 struct ibmvfc_host *vhost = shost_priv(shost); 2887 2888 return snprintf(buf, PAGE_SIZE, "%s\n", 2889 vhost->login_buf->resp.partition_name); 2890} 2891 2892static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2893 struct device_attribute *attr, char *buf) 2894{ 2895 struct Scsi_Host *shost = class_to_shost(dev); 2896 struct ibmvfc_host *vhost = shost_priv(shost); 2897 2898 return snprintf(buf, PAGE_SIZE, "%s\n", 2899 vhost->login_buf->resp.device_name); 2900} 2901 2902static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2903 struct device_attribute *attr, char *buf) 2904{ 2905 struct Scsi_Host *shost = class_to_shost(dev); 2906 struct ibmvfc_host *vhost = shost_priv(shost); 2907 2908 return snprintf(buf, PAGE_SIZE, "%s\n", 2909 vhost->login_buf->resp.port_loc_code); 2910} 2911 2912static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2913 struct device_attribute *attr, char *buf) 2914{ 2915 struct Scsi_Host *shost = class_to_shost(dev); 2916 struct ibmvfc_host *vhost = shost_priv(shost); 2917 2918 return snprintf(buf, PAGE_SIZE, "%s\n", 2919 vhost->login_buf->resp.drc_name); 2920} 2921 2922static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2923 struct device_attribute *attr, char *buf) 2924{ 2925 struct Scsi_Host *shost = class_to_shost(dev); 2926 struct ibmvfc_host *vhost = shost_priv(shost); 2927 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2928} 2929 2930static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 2931 struct device_attribute *attr, char *buf) 2932{ 2933 struct Scsi_Host *shost = class_to_shost(dev); 2934 struct ibmvfc_host *vhost = shost_priv(shost); 2935 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); 2936} 2937 2938/** 2939 * ibmvfc_show_log_level - Show the adapter's error logging level 2940 * @dev: class device struct 2941 * @buf: buffer 2942 * 2943 * Return value: 2944 * number of bytes printed to buffer 2945 **/ 2946static ssize_t ibmvfc_show_log_level(struct device *dev, 2947 struct device_attribute *attr, char *buf) 2948{ 2949 struct Scsi_Host *shost = class_to_shost(dev); 2950 struct ibmvfc_host *vhost = shost_priv(shost); 2951 unsigned long flags = 0; 2952 int len; 2953 2954 spin_lock_irqsave(shost->host_lock, flags); 2955 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2956 spin_unlock_irqrestore(shost->host_lock, flags); 2957 return len; 2958} 2959 2960/** 2961 * ibmvfc_store_log_level - Change the adapter's error logging level 2962 * @dev: class device struct 2963 * @buf: buffer 2964 * 2965 * Return value: 2966 * number of bytes printed to buffer 2967 **/ 2968static ssize_t ibmvfc_store_log_level(struct device *dev, 2969 struct device_attribute *attr, 2970 const char *buf, size_t count) 2971{ 2972 struct Scsi_Host *shost = class_to_shost(dev); 2973 struct ibmvfc_host *vhost = shost_priv(shost); 2974 unsigned long flags = 0; 2975 2976 spin_lock_irqsave(shost->host_lock, flags); 2977 vhost->log_level = simple_strtoul(buf, NULL, 10); 2978 spin_unlock_irqrestore(shost->host_lock, flags); 2979 return strlen(buf); 2980} 2981 2982static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 2983static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 2984static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 2985static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 2986static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 2987static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 2988static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 2989 ibmvfc_show_log_level, ibmvfc_store_log_level); 2990 2991#ifdef CONFIG_SCSI_IBMVFC_TRACE 2992/** 2993 * ibmvfc_read_trace - Dump the adapter trace 2994 * @filp: open sysfs file 2995 * @kobj: kobject struct 2996 * @bin_attr: bin_attribute struct 2997 * @buf: buffer 2998 * @off: offset 2999 * @count: buffer size 3000 * 3001 * Return value: 3002 * number of bytes printed to buffer 3003 **/ 3004static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 3005 struct bin_attribute *bin_attr, 3006 char *buf, loff_t off, size_t count) 3007{ 3008 struct device *dev = container_of(kobj, struct device, kobj); 3009 struct Scsi_Host *shost = class_to_shost(dev); 3010 struct ibmvfc_host *vhost = shost_priv(shost); 3011 unsigned long flags = 0; 3012 int size = IBMVFC_TRACE_SIZE; 3013 char *src = (char *)vhost->trace; 3014 3015 if (off > size) 3016 return 0; 3017 if (off + count > size) { 3018 size -= off; 3019 count = size; 3020 } 3021 3022 spin_lock_irqsave(shost->host_lock, flags); 3023 memcpy(buf, &src[off], count); 3024 spin_unlock_irqrestore(shost->host_lock, flags); 3025 return count; 3026} 3027 3028static struct bin_attribute ibmvfc_trace_attr = { 3029 .attr = { 3030 .name = "trace", 3031 .mode = S_IRUGO, 3032 }, 3033 .size = 0, 3034 .read = ibmvfc_read_trace, 3035}; 3036#endif 3037 3038static struct device_attribute *ibmvfc_attrs[] = { 3039 &dev_attr_partition_name, 3040 &dev_attr_device_name, 3041 &dev_attr_port_loc_code, 3042 &dev_attr_drc_name, 3043 &dev_attr_npiv_version, 3044 &dev_attr_capabilities, 3045 &dev_attr_log_level, 3046 NULL 3047}; 3048 3049static struct scsi_host_template driver_template = { 3050 .module = THIS_MODULE, 3051 .name = "IBM POWER Virtual FC Adapter", 3052 .proc_name = IBMVFC_NAME, 3053 .queuecommand = ibmvfc_queuecommand, 3054 .eh_abort_handler = ibmvfc_eh_abort_handler, 3055 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3056 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3057 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3058 .slave_alloc = ibmvfc_slave_alloc, 3059 .slave_configure = ibmvfc_slave_configure, 3060 .target_alloc = ibmvfc_target_alloc, 3061 .scan_finished = ibmvfc_scan_finished, 3062 .change_queue_depth = ibmvfc_change_queue_depth, 3063 .change_queue_type = ibmvfc_change_queue_type, 3064 .cmd_per_lun = 16, 3065 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3066 .this_id = -1, 3067 .sg_tablesize = SG_ALL, 3068 .max_sectors = IBMVFC_MAX_SECTORS, 3069 .use_clustering = ENABLE_CLUSTERING, 3070 .shost_attrs = ibmvfc_attrs, 3071}; 3072 3073/** 3074 * ibmvfc_next_async_crq - Returns the next entry in async queue 3075 * @vhost: ibmvfc host struct 3076 * 3077 * Returns: 3078 * Pointer to next entry in queue / NULL if empty 3079 **/ 3080static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3081{ 3082 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 3083 struct ibmvfc_async_crq *crq; 3084 3085 crq = &async_crq->msgs[async_crq->cur]; 3086 if (crq->valid & 0x80) { 3087 if (++async_crq->cur == async_crq->size) 3088 async_crq->cur = 0; 3089 rmb(); 3090 } else 3091 crq = NULL; 3092 3093 return crq; 3094} 3095 3096/** 3097 * ibmvfc_next_crq - Returns the next entry in message queue 3098 * @vhost: ibmvfc host struct 3099 * 3100 * Returns: 3101 * Pointer to next entry in queue / NULL if empty 3102 **/ 3103static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3104{ 3105 struct ibmvfc_crq_queue *queue = &vhost->crq; 3106 struct ibmvfc_crq *crq; 3107 3108 crq = &queue->msgs[queue->cur]; 3109 if (crq->valid & 0x80) { 3110 if (++queue->cur == queue->size) 3111 queue->cur = 0; 3112 rmb(); 3113 } else 3114 crq = NULL; 3115 3116 return crq; 3117} 3118 3119/** 3120 * ibmvfc_interrupt - Interrupt handler 3121 * @irq: number of irq to handle, not used 3122 * @dev_instance: ibmvfc_host that received interrupt 3123 * 3124 * Returns: 3125 * IRQ_HANDLED 3126 **/ 3127static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3128{ 3129 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3130 unsigned long flags; 3131 3132 spin_lock_irqsave(vhost->host->host_lock, flags); 3133 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3134 tasklet_schedule(&vhost->tasklet); 3135 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3136 return IRQ_HANDLED; 3137} 3138 3139/** 3140 * ibmvfc_tasklet - Interrupt handler tasklet 3141 * @data: ibmvfc host struct 3142 * 3143 * Returns: 3144 * Nothing 3145 **/ 3146static void ibmvfc_tasklet(void *data) 3147{ 3148 struct ibmvfc_host *vhost = data; 3149 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3150 struct ibmvfc_crq *crq; 3151 struct ibmvfc_async_crq *async; 3152 unsigned long flags; 3153 int done = 0; 3154 3155 spin_lock_irqsave(vhost->host->host_lock, flags); 3156 while (!done) { 3157 /* Pull all the valid messages off the async CRQ */ 3158 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3159 ibmvfc_handle_async(async, vhost); 3160 async->valid = 0; 3161 wmb(); 3162 } 3163 3164 /* Pull all the valid messages off the CRQ */ 3165 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3166 ibmvfc_handle_crq(crq, vhost); 3167 crq->valid = 0; 3168 wmb(); 3169 } 3170 3171 vio_enable_interrupts(vdev); 3172 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3173 vio_disable_interrupts(vdev); 3174 ibmvfc_handle_async(async, vhost); 3175 async->valid = 0; 3176 wmb(); 3177 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3178 vio_disable_interrupts(vdev); 3179 ibmvfc_handle_crq(crq, vhost); 3180 crq->valid = 0; 3181 wmb(); 3182 } else 3183 done = 1; 3184 } 3185 3186 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3187} 3188 3189/** 3190 * ibmvfc_init_tgt - Set the next init job step for the target 3191 * @tgt: ibmvfc target struct 3192 * @job_step: job step to perform 3193 * 3194 **/ 3195static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3196 void (*job_step) (struct ibmvfc_target *)) 3197{ 3198 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 3199 tgt->job_step = job_step; 3200 wake_up(&tgt->vhost->work_wait_q); 3201} 3202 3203/** 3204 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3205 * @tgt: ibmvfc target struct 3206 * @job_step: initialization job step 3207 * 3208 * Returns: 1 if step will be retried / 0 if not 3209 * 3210 **/ 3211static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3212 void (*job_step) (struct ibmvfc_target *)) 3213{ 3214 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3215 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3216 wake_up(&tgt->vhost->work_wait_q); 3217 return 0; 3218 } else 3219 ibmvfc_init_tgt(tgt, job_step); 3220 return 1; 3221} 3222 3223/* Defined in FC-LS */ 3224static const struct { 3225 int code; 3226 int retry; 3227 int logged_in; 3228} prli_rsp [] = { 3229 { 0, 1, 0 }, 3230 { 1, 0, 1 }, 3231 { 2, 1, 0 }, 3232 { 3, 1, 0 }, 3233 { 4, 0, 0 }, 3234 { 5, 0, 0 }, 3235 { 6, 0, 1 }, 3236 { 7, 0, 0 }, 3237 { 8, 1, 0 }, 3238}; 3239 3240/** 3241 * ibmvfc_get_prli_rsp - Find PRLI response index 3242 * @flags: PRLI response flags 3243 * 3244 **/ 3245static int ibmvfc_get_prli_rsp(u16 flags) 3246{ 3247 int i; 3248 int code = (flags & 0x0f00) >> 8; 3249 3250 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3251 if (prli_rsp[i].code == code) 3252 return i; 3253 3254 return 0; 3255} 3256 3257/** 3258 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3259 * @evt: ibmvfc event struct 3260 * 3261 **/ 3262static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3263{ 3264 struct ibmvfc_target *tgt = evt->tgt; 3265 struct ibmvfc_host *vhost = evt->vhost; 3266 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3267 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3268 u32 status = rsp->common.status; 3269 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3270 3271 vhost->discovery_threads--; 3272 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3273 switch (status) { 3274 case IBMVFC_MAD_SUCCESS: 3275 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3276 parms->type, parms->flags, parms->service_parms); 3277 3278 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3279 index = ibmvfc_get_prli_rsp(parms->flags); 3280 if (prli_rsp[index].logged_in) { 3281 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) { 3282 tgt->need_login = 0; 3283 tgt->ids.roles = 0; 3284 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC) 3285 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3286 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC) 3287 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3288 tgt->add_rport = 1; 3289 } else 3290 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3291 } else if (prli_rsp[index].retry) 3292 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3293 else 3294 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3295 } else 3296 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3297 break; 3298 case IBMVFC_MAD_DRIVER_FAILED: 3299 break; 3300 case IBMVFC_MAD_CRQ_ERROR: 3301 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3302 break; 3303 case IBMVFC_MAD_FAILED: 3304 default: 3305 if ((rsp->status & IBMVFC_VIOS_FAILURE) && rsp->error == IBMVFC_PLOGI_REQUIRED) 3306 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3307 else if (tgt->logo_rcvd) 3308 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3309 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3310 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3311 else 3312 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3313 3314 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3315 ibmvfc_get_cmd_error(rsp->status, rsp->error), 3316 rsp->status, rsp->error, status); 3317 break; 3318 }; 3319 3320 kref_put(&tgt->kref, ibmvfc_release_tgt); 3321 ibmvfc_free_event(evt); 3322 wake_up(&vhost->work_wait_q); 3323} 3324 3325/** 3326 * ibmvfc_tgt_send_prli - Send a process login 3327 * @tgt: ibmvfc target struct 3328 * 3329 **/ 3330static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3331{ 3332 struct ibmvfc_process_login *prli; 3333 struct ibmvfc_host *vhost = tgt->vhost; 3334 struct ibmvfc_event *evt; 3335 3336 if (vhost->discovery_threads >= disc_threads) 3337 return; 3338 3339 kref_get(&tgt->kref); 3340 evt = ibmvfc_get_event(vhost); 3341 vhost->discovery_threads++; 3342 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 3343 evt->tgt = tgt; 3344 prli = &evt->iu.prli; 3345 memset(prli, 0, sizeof(*prli)); 3346 prli->common.version = 1; 3347 prli->common.opcode = IBMVFC_PROCESS_LOGIN; 3348 prli->common.length = sizeof(*prli); 3349 prli->scsi_id = tgt->scsi_id; 3350 3351 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 3352 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; 3353 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; 3354 3355 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3356 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3357 vhost->discovery_threads--; 3358 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3359 kref_put(&tgt->kref, ibmvfc_release_tgt); 3360 } else 3361 tgt_dbg(tgt, "Sent process login\n"); 3362} 3363 3364/** 3365 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 3366 * @evt: ibmvfc event struct 3367 * 3368 **/ 3369static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 3370{ 3371 struct ibmvfc_target *tgt = evt->tgt; 3372 struct ibmvfc_host *vhost = evt->vhost; 3373 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 3374 u32 status = rsp->common.status; 3375 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3376 3377 vhost->discovery_threads--; 3378 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3379 switch (status) { 3380 case IBMVFC_MAD_SUCCESS: 3381 tgt_dbg(tgt, "Port Login succeeded\n"); 3382 if (tgt->ids.port_name && 3383 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 3384 vhost->reinit = 1; 3385 tgt_dbg(tgt, "Port re-init required\n"); 3386 break; 3387 } 3388 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3389 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3390 tgt->ids.port_id = tgt->scsi_id; 3391 memcpy(&tgt->service_parms, &rsp->service_parms, 3392 sizeof(tgt->service_parms)); 3393 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3394 sizeof(tgt->service_parms_change)); 3395 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3396 break; 3397 case IBMVFC_MAD_DRIVER_FAILED: 3398 break; 3399 case IBMVFC_MAD_CRQ_ERROR: 3400 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3401 break; 3402 case IBMVFC_MAD_FAILED: 3403 default: 3404 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3405 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3406 else 3407 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3408 3409 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3410 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3411 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3412 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); 3413 break; 3414 }; 3415 3416 kref_put(&tgt->kref, ibmvfc_release_tgt); 3417 ibmvfc_free_event(evt); 3418 wake_up(&vhost->work_wait_q); 3419} 3420 3421/** 3422 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3423 * @tgt: ibmvfc target struct 3424 * 3425 **/ 3426static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3427{ 3428 struct ibmvfc_port_login *plogi; 3429 struct ibmvfc_host *vhost = tgt->vhost; 3430 struct ibmvfc_event *evt; 3431 3432 if (vhost->discovery_threads >= disc_threads) 3433 return; 3434 3435 kref_get(&tgt->kref); 3436 tgt->logo_rcvd = 0; 3437 evt = ibmvfc_get_event(vhost); 3438 vhost->discovery_threads++; 3439 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3440 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3441 evt->tgt = tgt; 3442 plogi = &evt->iu.plogi; 3443 memset(plogi, 0, sizeof(*plogi)); 3444 plogi->common.version = 1; 3445 plogi->common.opcode = IBMVFC_PORT_LOGIN; 3446 plogi->common.length = sizeof(*plogi); 3447 plogi->scsi_id = tgt->scsi_id; 3448 3449 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3450 vhost->discovery_threads--; 3451 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3452 kref_put(&tgt->kref, ibmvfc_release_tgt); 3453 } else 3454 tgt_dbg(tgt, "Sent port login\n"); 3455} 3456 3457/** 3458 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3459 * @evt: ibmvfc event struct 3460 * 3461 **/ 3462static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3463{ 3464 struct ibmvfc_target *tgt = evt->tgt; 3465 struct ibmvfc_host *vhost = evt->vhost; 3466 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3467 u32 status = rsp->common.status; 3468 3469 vhost->discovery_threads--; 3470 ibmvfc_free_event(evt); 3471 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3472 3473 switch (status) { 3474 case IBMVFC_MAD_SUCCESS: 3475 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3476 break; 3477 case IBMVFC_MAD_DRIVER_FAILED: 3478 kref_put(&tgt->kref, ibmvfc_release_tgt); 3479 wake_up(&vhost->work_wait_q); 3480 return; 3481 case IBMVFC_MAD_FAILED: 3482 default: 3483 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3484 break; 3485 }; 3486 3487 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3488 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3489 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3490 tgt->scsi_id != tgt->new_scsi_id) 3491 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3492 kref_put(&tgt->kref, ibmvfc_release_tgt); 3493 wake_up(&vhost->work_wait_q); 3494} 3495 3496/** 3497 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3498 * @tgt: ibmvfc target struct 3499 * 3500 **/ 3501static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3502{ 3503 struct ibmvfc_implicit_logout *mad; 3504 struct ibmvfc_host *vhost = tgt->vhost; 3505 struct ibmvfc_event *evt; 3506 3507 if (vhost->discovery_threads >= disc_threads) 3508 return; 3509 3510 kref_get(&tgt->kref); 3511 evt = ibmvfc_get_event(vhost); 3512 vhost->discovery_threads++; 3513 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3514 evt->tgt = tgt; 3515 mad = &evt->iu.implicit_logout; 3516 memset(mad, 0, sizeof(*mad)); 3517 mad->common.version = 1; 3518 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; 3519 mad->common.length = sizeof(*mad); 3520 mad->old_scsi_id = tgt->scsi_id; 3521 3522 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3523 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3524 vhost->discovery_threads--; 3525 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3526 kref_put(&tgt->kref, ibmvfc_release_tgt); 3527 } else 3528 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3529} 3530 3531/** 3532 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3533 * @mad: ibmvfc passthru mad struct 3534 * @tgt: ibmvfc target struct 3535 * 3536 * Returns: 3537 * 1 if PLOGI needed / 0 if PLOGI not needed 3538 **/ 3539static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3540 struct ibmvfc_target *tgt) 3541{ 3542 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3543 sizeof(tgt->ids.port_name))) 3544 return 1; 3545 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3546 sizeof(tgt->ids.node_name))) 3547 return 1; 3548 if (mad->fc_iu.response[6] != tgt->scsi_id) 3549 return 1; 3550 return 0; 3551} 3552 3553/** 3554 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3555 * @evt: ibmvfc event struct 3556 * 3557 **/ 3558static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3559{ 3560 struct ibmvfc_target *tgt = evt->tgt; 3561 struct ibmvfc_host *vhost = evt->vhost; 3562 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3563 u32 status = mad->common.status; 3564 u8 fc_reason, fc_explain; 3565 3566 vhost->discovery_threads--; 3567 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3568 del_timer(&tgt->timer); 3569 3570 switch (status) { 3571 case IBMVFC_MAD_SUCCESS: 3572 tgt_dbg(tgt, "ADISC succeeded\n"); 3573 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3574 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3575 break; 3576 case IBMVFC_MAD_DRIVER_FAILED: 3577 break; 3578 case IBMVFC_MAD_FAILED: 3579 default: 3580 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3581 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; 3582 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; 3583 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3584 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), 3585 mad->iu.status, mad->iu.error, 3586 ibmvfc_get_fc_type(fc_reason), fc_reason, 3587 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3588 break; 3589 }; 3590 3591 kref_put(&tgt->kref, ibmvfc_release_tgt); 3592 ibmvfc_free_event(evt); 3593 wake_up(&vhost->work_wait_q); 3594} 3595 3596/** 3597 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3598 * @evt: ibmvfc event struct 3599 * 3600 **/ 3601static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3602{ 3603 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3604 3605 memset(mad, 0, sizeof(*mad)); 3606 mad->common.version = 1; 3607 mad->common.opcode = IBMVFC_PASSTHRU; 3608 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 3609 mad->cmd_ioba.va = (u64)evt->crq.ioba + 3610 offsetof(struct ibmvfc_passthru_mad, iu); 3611 mad->cmd_ioba.len = sizeof(mad->iu); 3612 mad->iu.cmd_len = sizeof(mad->fc_iu.payload); 3613 mad->iu.rsp_len = sizeof(mad->fc_iu.response); 3614 mad->iu.cmd.va = (u64)evt->crq.ioba + 3615 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3616 offsetof(struct ibmvfc_passthru_fc_iu, payload); 3617 mad->iu.cmd.len = sizeof(mad->fc_iu.payload); 3618 mad->iu.rsp.va = (u64)evt->crq.ioba + 3619 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3620 offsetof(struct ibmvfc_passthru_fc_iu, response); 3621 mad->iu.rsp.len = sizeof(mad->fc_iu.response); 3622} 3623 3624/** 3625 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3626 * @evt: ibmvfc event struct 3627 * 3628 * Just cleanup this event struct. Everything else is handled by 3629 * the ADISC completion handler. If the ADISC never actually comes 3630 * back, we still have the timer running on the ADISC event struct 3631 * which will fire and cause the CRQ to get reset. 3632 * 3633 **/ 3634static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3635{ 3636 struct ibmvfc_host *vhost = evt->vhost; 3637 struct ibmvfc_target *tgt = evt->tgt; 3638 3639 tgt_dbg(tgt, "ADISC cancel complete\n"); 3640 vhost->abort_threads--; 3641 ibmvfc_free_event(evt); 3642 kref_put(&tgt->kref, ibmvfc_release_tgt); 3643 wake_up(&vhost->work_wait_q); 3644} 3645 3646/** 3647 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3648 * @tgt: ibmvfc target struct 3649 * 3650 * If an ADISC times out, send a cancel. If the cancel times 3651 * out, reset the CRQ. When the ADISC comes back as cancelled, 3652 * log back into the target. 3653 **/ 3654static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) 3655{ 3656 struct ibmvfc_host *vhost = tgt->vhost; 3657 struct ibmvfc_event *evt; 3658 struct ibmvfc_tmf *tmf; 3659 unsigned long flags; 3660 int rc; 3661 3662 tgt_dbg(tgt, "ADISC timeout\n"); 3663 spin_lock_irqsave(vhost->host->host_lock, flags); 3664 if (vhost->abort_threads >= disc_threads || 3665 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3666 vhost->state != IBMVFC_INITIALIZING || 3667 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3668 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3669 return; 3670 } 3671 3672 vhost->abort_threads++; 3673 kref_get(&tgt->kref); 3674 evt = ibmvfc_get_event(vhost); 3675 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3676 3677 evt->tgt = tgt; 3678 tmf = &evt->iu.tmf; 3679 memset(tmf, 0, sizeof(*tmf)); 3680 tmf->common.version = 1; 3681 tmf->common.opcode = IBMVFC_TMF_MAD; 3682 tmf->common.length = sizeof(*tmf); 3683 tmf->scsi_id = tgt->scsi_id; 3684 tmf->cancel_key = tgt->cancel_key; 3685 3686 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3687 3688 if (rc) { 3689 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3690 vhost->abort_threads--; 3691 kref_put(&tgt->kref, ibmvfc_release_tgt); 3692 __ibmvfc_reset_host(vhost); 3693 } else 3694 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3695 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3696} 3697 3698/** 3699 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3700 * @tgt: ibmvfc target struct 3701 * 3702 * When sending an ADISC we end up with two timers running. The 3703 * first timer is the timer in the ibmvfc target struct. If this 3704 * fires, we send a cancel to the target. The second timer is the 3705 * timer on the ibmvfc event for the ADISC, which is longer. If that 3706 * fires, it means the ADISC timed out and our attempt to cancel it 3707 * also failed, so we need to reset the CRQ. 3708 **/ 3709static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3710{ 3711 struct ibmvfc_passthru_mad *mad; 3712 struct ibmvfc_host *vhost = tgt->vhost; 3713 struct ibmvfc_event *evt; 3714 3715 if (vhost->discovery_threads >= disc_threads) 3716 return; 3717 3718 kref_get(&tgt->kref); 3719 evt = ibmvfc_get_event(vhost); 3720 vhost->discovery_threads++; 3721 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3722 evt->tgt = tgt; 3723 3724 ibmvfc_init_passthru(evt); 3725 mad = &evt->iu.passthru; 3726 mad->iu.flags = IBMVFC_FC_ELS; 3727 mad->iu.scsi_id = tgt->scsi_id; 3728 mad->iu.cancel_key = tgt->cancel_key; 3729 3730 mad->fc_iu.payload[0] = IBMVFC_ADISC; 3731 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3732 sizeof(vhost->login_buf->resp.port_name)); 3733 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3734 sizeof(vhost->login_buf->resp.node_name)); 3735 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; 3736 3737 if (timer_pending(&tgt->timer)) 3738 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3739 else { 3740 tgt->timer.data = (unsigned long) tgt; 3741 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3742 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; 3743 add_timer(&tgt->timer); 3744 } 3745 3746 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3747 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3748 vhost->discovery_threads--; 3749 del_timer(&tgt->timer); 3750 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3751 kref_put(&tgt->kref, ibmvfc_release_tgt); 3752 } else 3753 tgt_dbg(tgt, "Sent ADISC\n"); 3754} 3755 3756/** 3757 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3758 * @evt: ibmvfc event struct 3759 * 3760 **/ 3761static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3762{ 3763 struct ibmvfc_target *tgt = evt->tgt; 3764 struct ibmvfc_host *vhost = evt->vhost; 3765 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3766 u32 status = rsp->common.status; 3767 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3768 3769 vhost->discovery_threads--; 3770 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3771 switch (status) { 3772 case IBMVFC_MAD_SUCCESS: 3773 tgt_dbg(tgt, "Query Target succeeded\n"); 3774 tgt->new_scsi_id = rsp->scsi_id; 3775 if (rsp->scsi_id != tgt->scsi_id) 3776 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3777 else 3778 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3779 break; 3780 case IBMVFC_MAD_DRIVER_FAILED: 3781 break; 3782 case IBMVFC_MAD_CRQ_ERROR: 3783 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3784 break; 3785 case IBMVFC_MAD_FAILED: 3786 default: 3787 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3788 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && 3789 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) 3790 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3791 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3792 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3793 else 3794 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3795 3796 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3797 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3798 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3799 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); 3800 break; 3801 }; 3802 3803 kref_put(&tgt->kref, ibmvfc_release_tgt); 3804 ibmvfc_free_event(evt); 3805 wake_up(&vhost->work_wait_q); 3806} 3807 3808/** 3809 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3810 * @tgt: ibmvfc target struct 3811 * 3812 **/ 3813static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3814{ 3815 struct ibmvfc_query_tgt *query_tgt; 3816 struct ibmvfc_host *vhost = tgt->vhost; 3817 struct ibmvfc_event *evt; 3818 3819 if (vhost->discovery_threads >= disc_threads) 3820 return; 3821 3822 kref_get(&tgt->kref); 3823 evt = ibmvfc_get_event(vhost); 3824 vhost->discovery_threads++; 3825 evt->tgt = tgt; 3826 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3827 query_tgt = &evt->iu.query_tgt; 3828 memset(query_tgt, 0, sizeof(*query_tgt)); 3829 query_tgt->common.version = 1; 3830 query_tgt->common.opcode = IBMVFC_QUERY_TARGET; 3831 query_tgt->common.length = sizeof(*query_tgt); 3832 query_tgt->wwpn = tgt->ids.port_name; 3833 3834 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3835 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3836 vhost->discovery_threads--; 3837 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3838 kref_put(&tgt->kref, ibmvfc_release_tgt); 3839 } else 3840 tgt_dbg(tgt, "Sent Query Target\n"); 3841} 3842 3843/** 3844 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3845 * @vhost: ibmvfc host struct 3846 * @scsi_id: SCSI ID to allocate target for 3847 * 3848 * Returns: 3849 * 0 on success / other on failure 3850 **/ 3851static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3852{ 3853 struct ibmvfc_target *tgt; 3854 unsigned long flags; 3855 3856 spin_lock_irqsave(vhost->host->host_lock, flags); 3857 list_for_each_entry(tgt, &vhost->targets, queue) { 3858 if (tgt->scsi_id == scsi_id) { 3859 if (tgt->need_login) 3860 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3861 goto unlock_out; 3862 } 3863 } 3864 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3865 3866 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3867 if (!tgt) { 3868 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", 3869 scsi_id); 3870 return -ENOMEM; 3871 } 3872 3873 memset(tgt, 0, sizeof(*tgt)); 3874 tgt->scsi_id = scsi_id; 3875 tgt->new_scsi_id = scsi_id; 3876 tgt->vhost = vhost; 3877 tgt->need_login = 1; 3878 tgt->cancel_key = vhost->task_set++; 3879 init_timer(&tgt->timer); 3880 kref_init(&tgt->kref); 3881 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3882 spin_lock_irqsave(vhost->host->host_lock, flags); 3883 list_add_tail(&tgt->queue, &vhost->targets); 3884 3885unlock_out: 3886 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3887 return 0; 3888} 3889 3890/** 3891 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3892 * @vhost: ibmvfc host struct 3893 * 3894 * Returns: 3895 * 0 on success / other on failure 3896 **/ 3897static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3898{ 3899 int i, rc; 3900 3901 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3902 rc = ibmvfc_alloc_target(vhost, 3903 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); 3904 3905 return rc; 3906} 3907 3908/** 3909 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3910 * @evt: ibmvfc event struct 3911 * 3912 **/ 3913static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3914{ 3915 struct ibmvfc_host *vhost = evt->vhost; 3916 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3917 u32 mad_status = rsp->common.status; 3918 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3919 3920 switch (mad_status) { 3921 case IBMVFC_MAD_SUCCESS: 3922 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3923 vhost->num_targets = rsp->num_written; 3924 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3925 break; 3926 case IBMVFC_MAD_FAILED: 3927 level += ibmvfc_retry_host_init(vhost); 3928 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 3929 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3930 break; 3931 case IBMVFC_MAD_DRIVER_FAILED: 3932 break; 3933 default: 3934 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3935 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3936 break; 3937 } 3938 3939 ibmvfc_free_event(evt); 3940 wake_up(&vhost->work_wait_q); 3941} 3942 3943/** 3944 * ibmvfc_discover_targets - Send Discover Targets MAD 3945 * @vhost: ibmvfc host struct 3946 * 3947 **/ 3948static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3949{ 3950 struct ibmvfc_discover_targets *mad; 3951 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3952 3953 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3954 mad = &evt->iu.discover_targets; 3955 memset(mad, 0, sizeof(*mad)); 3956 mad->common.version = 1; 3957 mad->common.opcode = IBMVFC_DISC_TARGETS; 3958 mad->common.length = sizeof(*mad); 3959 mad->bufflen = vhost->disc_buf_sz; 3960 mad->buffer.va = vhost->disc_buf_dma; 3961 mad->buffer.len = vhost->disc_buf_sz; 3962 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3963 3964 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3965 ibmvfc_dbg(vhost, "Sent discover targets\n"); 3966 else 3967 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3968} 3969 3970/** 3971 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 3972 * @evt: ibmvfc event struct 3973 * 3974 **/ 3975static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 3976{ 3977 struct ibmvfc_host *vhost = evt->vhost; 3978 u32 mad_status = evt->xfer_iu->npiv_login.common.status; 3979 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 3980 unsigned int npiv_max_sectors; 3981 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3982 3983 switch (mad_status) { 3984 case IBMVFC_MAD_SUCCESS: 3985 ibmvfc_free_event(evt); 3986 break; 3987 case IBMVFC_MAD_FAILED: 3988 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3989 level += ibmvfc_retry_host_init(vhost); 3990 else 3991 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3992 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 3993 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3994 ibmvfc_free_event(evt); 3995 return; 3996 case IBMVFC_MAD_CRQ_ERROR: 3997 ibmvfc_retry_host_init(vhost); 3998 case IBMVFC_MAD_DRIVER_FAILED: 3999 ibmvfc_free_event(evt); 4000 return; 4001 default: 4002 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 4003 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4004 ibmvfc_free_event(evt); 4005 return; 4006 } 4007 4008 vhost->client_migrated = 0; 4009 4010 if (!(rsp->flags & IBMVFC_NATIVE_FC)) { 4011 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 4012 rsp->flags); 4013 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4014 wake_up(&vhost->work_wait_q); 4015 return; 4016 } 4017 4018 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { 4019 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 4020 rsp->max_cmds); 4021 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4022 wake_up(&vhost->work_wait_q); 4023 return; 4024 } 4025 4026 vhost->logged_in = 1; 4027 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); 4028 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 4029 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 4030 rsp->drc_name, npiv_max_sectors); 4031 4032 fc_host_fabric_name(vhost->host) = rsp->node_name; 4033 fc_host_node_name(vhost->host) = rsp->node_name; 4034 fc_host_port_name(vhost->host) = rsp->port_name; 4035 fc_host_port_id(vhost->host) = rsp->scsi_id; 4036 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 4037 fc_host_supported_classes(vhost->host) = 0; 4038 if (rsp->service_parms.class1_parms[0] & 0x80000000) 4039 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 4040 if (rsp->service_parms.class2_parms[0] & 0x80000000) 4041 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 4042 if (rsp->service_parms.class3_parms[0] & 0x80000000) 4043 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 4044 fc_host_maxframe_size(vhost->host) = 4045 rsp->service_parms.common.bb_rcv_sz & 0x0fff; 4046 4047 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; 4048 vhost->host->max_sectors = npiv_max_sectors; 4049 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4050 wake_up(&vhost->work_wait_q); 4051} 4052 4053/** 4054 * ibmvfc_npiv_login - Sends NPIV login 4055 * @vhost: ibmvfc host struct 4056 * 4057 **/ 4058static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 4059{ 4060 struct ibmvfc_npiv_login_mad *mad; 4061 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4062 4063 ibmvfc_gather_partition_info(vhost); 4064 ibmvfc_set_login_info(vhost); 4065 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 4066 4067 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 4068 mad = &evt->iu.npiv_login; 4069 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 4070 mad->common.version = 1; 4071 mad->common.opcode = IBMVFC_NPIV_LOGIN; 4072 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); 4073 mad->buffer.va = vhost->login_buf_dma; 4074 mad->buffer.len = sizeof(*vhost->login_buf); 4075 4076 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4077 4078 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4079 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 4080 else 4081 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4082}; 4083 4084/** 4085 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 4086 * @vhost: ibmvfc host struct 4087 * 4088 **/ 4089static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 4090{ 4091 struct ibmvfc_host *vhost = evt->vhost; 4092 u32 mad_status = evt->xfer_iu->npiv_logout.common.status; 4093 4094 ibmvfc_free_event(evt); 4095 4096 switch (mad_status) { 4097 case IBMVFC_MAD_SUCCESS: 4098 if (list_empty(&vhost->sent) && 4099 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 4100 ibmvfc_init_host(vhost); 4101 return; 4102 } 4103 break; 4104 case IBMVFC_MAD_FAILED: 4105 case IBMVFC_MAD_NOT_SUPPORTED: 4106 case IBMVFC_MAD_CRQ_ERROR: 4107 case IBMVFC_MAD_DRIVER_FAILED: 4108 default: 4109 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 4110 break; 4111 } 4112 4113 ibmvfc_hard_reset_host(vhost); 4114} 4115 4116/** 4117 * ibmvfc_npiv_logout - Issue an NPIV Logout 4118 * @vhost: ibmvfc host struct 4119 * 4120 **/ 4121static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 4122{ 4123 struct ibmvfc_npiv_logout_mad *mad; 4124 struct ibmvfc_event *evt; 4125 4126 evt = ibmvfc_get_event(vhost); 4127 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 4128 4129 mad = &evt->iu.npiv_logout; 4130 memset(mad, 0, sizeof(*mad)); 4131 mad->common.version = 1; 4132 mad->common.opcode = IBMVFC_NPIV_LOGOUT; 4133 mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad); 4134 4135 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 4136 4137 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4138 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 4139 else 4140 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4141} 4142 4143/** 4144 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 4145 * @vhost: ibmvfc host struct 4146 * 4147 * Returns: 4148 * 1 if work to do / 0 if not 4149 **/ 4150static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 4151{ 4152 struct ibmvfc_target *tgt; 4153 4154 list_for_each_entry(tgt, &vhost->targets, queue) { 4155 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 4156 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4157 return 1; 4158 } 4159 4160 return 0; 4161} 4162 4163/** 4164 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 4165 * @vhost: ibmvfc host struct 4166 * 4167 * Returns: 4168 * 1 if work to do / 0 if not 4169 **/ 4170static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4171{ 4172 struct ibmvfc_target *tgt; 4173 4174 if (kthread_should_stop()) 4175 return 1; 4176 switch (vhost->action) { 4177 case IBMVFC_HOST_ACTION_NONE: 4178 case IBMVFC_HOST_ACTION_INIT_WAIT: 4179 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4180 return 0; 4181 case IBMVFC_HOST_ACTION_TGT_INIT: 4182 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4183 if (vhost->discovery_threads == disc_threads) 4184 return 0; 4185 list_for_each_entry(tgt, &vhost->targets, queue) 4186 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 4187 return 1; 4188 list_for_each_entry(tgt, &vhost->targets, queue) 4189 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4190 return 0; 4191 return 1; 4192 case IBMVFC_HOST_ACTION_LOGO: 4193 case IBMVFC_HOST_ACTION_INIT: 4194 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4195 case IBMVFC_HOST_ACTION_TGT_DEL: 4196 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4197 case IBMVFC_HOST_ACTION_QUERY: 4198 case IBMVFC_HOST_ACTION_RESET: 4199 case IBMVFC_HOST_ACTION_REENABLE: 4200 default: 4201 break; 4202 }; 4203 4204 return 1; 4205} 4206 4207/** 4208 * ibmvfc_work_to_do - Is there task level work to do? 4209 * @vhost: ibmvfc host struct 4210 * 4211 * Returns: 4212 * 1 if work to do / 0 if not 4213 **/ 4214static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4215{ 4216 unsigned long flags; 4217 int rc; 4218 4219 spin_lock_irqsave(vhost->host->host_lock, flags); 4220 rc = __ibmvfc_work_to_do(vhost); 4221 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4222 return rc; 4223} 4224 4225/** 4226 * ibmvfc_log_ae - Log async events if necessary 4227 * @vhost: ibmvfc host struct 4228 * @events: events to log 4229 * 4230 **/ 4231static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 4232{ 4233 if (events & IBMVFC_AE_RSCN) 4234 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 4235 if ((events & IBMVFC_AE_LINKDOWN) && 4236 vhost->state >= IBMVFC_HALTED) 4237 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 4238 if ((events & IBMVFC_AE_LINKUP) && 4239 vhost->state == IBMVFC_INITIALIZING) 4240 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 4241} 4242 4243/** 4244 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 4245 * @tgt: ibmvfc target struct 4246 * 4247 **/ 4248static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 4249{ 4250 struct ibmvfc_host *vhost = tgt->vhost; 4251 struct fc_rport *rport; 4252 unsigned long flags; 4253 4254 tgt_dbg(tgt, "Adding rport\n"); 4255 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 4256 spin_lock_irqsave(vhost->host->host_lock, flags); 4257 4258 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4259 tgt_dbg(tgt, "Deleting rport\n"); 4260 list_del(&tgt->queue); 4261 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4262 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4263 fc_remote_port_delete(rport); 4264 del_timer_sync(&tgt->timer); 4265 kref_put(&tgt->kref, ibmvfc_release_tgt); 4266 return; 4267 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 4268 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4269 return; 4270 } 4271 4272 if (rport) { 4273 tgt_dbg(tgt, "rport add succeeded\n"); 4274 tgt->rport = rport; 4275 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; 4276 rport->supported_classes = 0; 4277 tgt->target_id = rport->scsi_target_id; 4278 if (tgt->service_parms.class1_parms[0] & 0x80000000) 4279 rport->supported_classes |= FC_COS_CLASS1; 4280 if (tgt->service_parms.class2_parms[0] & 0x80000000) 4281 rport->supported_classes |= FC_COS_CLASS2; 4282 if (tgt->service_parms.class3_parms[0] & 0x80000000) 4283 rport->supported_classes |= FC_COS_CLASS3; 4284 if (rport->rqst_q) 4285 blk_queue_max_segments(rport->rqst_q, 1); 4286 } else 4287 tgt_dbg(tgt, "rport add failed\n"); 4288 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4289} 4290 4291/** 4292 * ibmvfc_do_work - Do task level work 4293 * @vhost: ibmvfc host struct 4294 * 4295 **/ 4296static void ibmvfc_do_work(struct ibmvfc_host *vhost) 4297{ 4298 struct ibmvfc_target *tgt; 4299 unsigned long flags; 4300 struct fc_rport *rport; 4301 int rc; 4302 4303 ibmvfc_log_ae(vhost, vhost->events_to_log); 4304 spin_lock_irqsave(vhost->host->host_lock, flags); 4305 vhost->events_to_log = 0; 4306 switch (vhost->action) { 4307 case IBMVFC_HOST_ACTION_NONE: 4308 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4309 case IBMVFC_HOST_ACTION_INIT_WAIT: 4310 break; 4311 case IBMVFC_HOST_ACTION_RESET: 4312 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4313 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4314 rc = ibmvfc_reset_crq(vhost); 4315 spin_lock_irqsave(vhost->host->host_lock, flags); 4316 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 4317 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 4318 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4319 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 4320 } 4321 break; 4322 case IBMVFC_HOST_ACTION_REENABLE: 4323 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4324 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4325 rc = ibmvfc_reenable_crq_queue(vhost); 4326 spin_lock_irqsave(vhost->host->host_lock, flags); 4327 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 4328 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4329 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 4330 } 4331 break; 4332 case IBMVFC_HOST_ACTION_LOGO: 4333 vhost->job_step(vhost); 4334 break; 4335 case IBMVFC_HOST_ACTION_INIT: 4336 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 4337 if (vhost->delay_init) { 4338 vhost->delay_init = 0; 4339 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4340 ssleep(15); 4341 return; 4342 } else 4343 vhost->job_step(vhost); 4344 break; 4345 case IBMVFC_HOST_ACTION_QUERY: 4346 list_for_each_entry(tgt, &vhost->targets, queue) 4347 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 4348 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 4349 break; 4350 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4351 list_for_each_entry(tgt, &vhost->targets, queue) { 4352 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4353 tgt->job_step(tgt); 4354 break; 4355 } 4356 } 4357 4358 if (!ibmvfc_dev_init_to_do(vhost)) 4359 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 4360 break; 4361 case IBMVFC_HOST_ACTION_TGT_DEL: 4362 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4363 list_for_each_entry(tgt, &vhost->targets, queue) { 4364 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4365 tgt_dbg(tgt, "Deleting rport\n"); 4366 rport = tgt->rport; 4367 tgt->rport = NULL; 4368 list_del(&tgt->queue); 4369 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4370 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4371 if (rport) 4372 fc_remote_port_delete(rport); 4373 del_timer_sync(&tgt->timer); 4374 kref_put(&tgt->kref, ibmvfc_release_tgt); 4375 return; 4376 } 4377 } 4378 4379 if (vhost->state == IBMVFC_INITIALIZING) { 4380 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 4381 if (vhost->reinit) { 4382 vhost->reinit = 0; 4383 scsi_block_requests(vhost->host); 4384 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4385 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4386 } else { 4387 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 4388 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4389 wake_up(&vhost->init_wait_q); 4390 schedule_work(&vhost->rport_add_work_q); 4391 vhost->init_retries = 0; 4392 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4393 scsi_unblock_requests(vhost->host); 4394 } 4395 4396 return; 4397 } else { 4398 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 4399 vhost->job_step = ibmvfc_discover_targets; 4400 } 4401 } else { 4402 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4403 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4404 scsi_unblock_requests(vhost->host); 4405 wake_up(&vhost->init_wait_q); 4406 return; 4407 } 4408 break; 4409 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4410 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4411 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4412 ibmvfc_alloc_targets(vhost); 4413 spin_lock_irqsave(vhost->host->host_lock, flags); 4414 break; 4415 case IBMVFC_HOST_ACTION_TGT_INIT: 4416 list_for_each_entry(tgt, &vhost->targets, queue) { 4417 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4418 tgt->job_step(tgt); 4419 break; 4420 } 4421 } 4422 4423 if (!ibmvfc_dev_init_to_do(vhost)) 4424 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4425 break; 4426 default: 4427 break; 4428 }; 4429 4430 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4431} 4432 4433/** 4434 * ibmvfc_work - Do task level work 4435 * @data: ibmvfc host struct 4436 * 4437 * Returns: 4438 * zero 4439 **/ 4440static int ibmvfc_work(void *data) 4441{ 4442 struct ibmvfc_host *vhost = data; 4443 int rc; 4444 4445 set_user_nice(current, -20); 4446 4447 while (1) { 4448 rc = wait_event_interruptible(vhost->work_wait_q, 4449 ibmvfc_work_to_do(vhost)); 4450 4451 BUG_ON(rc); 4452 4453 if (kthread_should_stop()) 4454 break; 4455 4456 ibmvfc_do_work(vhost); 4457 } 4458 4459 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4460 return 0; 4461} 4462 4463/** 4464 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4465 * @vhost: ibmvfc host struct 4466 * 4467 * Allocates a page for messages, maps it for dma, and registers 4468 * the crq with the hypervisor. 4469 * 4470 * Return value: 4471 * zero on success / other on failure 4472 **/ 4473static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4474{ 4475 int rc, retrc = -ENOMEM; 4476 struct device *dev = vhost->dev; 4477 struct vio_dev *vdev = to_vio_dev(dev); 4478 struct ibmvfc_crq_queue *crq = &vhost->crq; 4479 4480 ENTER; 4481 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4482 4483 if (!crq->msgs) 4484 return -ENOMEM; 4485 4486 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4487 crq->msg_token = dma_map_single(dev, crq->msgs, 4488 PAGE_SIZE, DMA_BIDIRECTIONAL); 4489 4490 if (dma_mapping_error(dev, crq->msg_token)) 4491 goto map_failed; 4492 4493 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4494 crq->msg_token, PAGE_SIZE); 4495 4496 if (rc == H_RESOURCE) 4497 /* maybe kexecing and resource is busy. try a reset */ 4498 retrc = rc = ibmvfc_reset_crq(vhost); 4499 4500 if (rc == H_CLOSED) 4501 dev_warn(dev, "Partner adapter not ready\n"); 4502 else if (rc) { 4503 dev_warn(dev, "Error %d opening adapter\n", rc); 4504 goto reg_crq_failed; 4505 } 4506 4507 retrc = 0; 4508 4509 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4510 4511 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4512 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4513 goto req_irq_failed; 4514 } 4515 4516 if ((rc = vio_enable_interrupts(vdev))) { 4517 dev_err(dev, "Error %d enabling interrupts\n", rc); 4518 goto req_irq_failed; 4519 } 4520 4521 crq->cur = 0; 4522 LEAVE; 4523 return retrc; 4524 4525req_irq_failed: 4526 tasklet_kill(&vhost->tasklet); 4527 do { 4528 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4529 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4530reg_crq_failed: 4531 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4532map_failed: 4533 free_page((unsigned long)crq->msgs); 4534 return retrc; 4535} 4536 4537/** 4538 * ibmvfc_free_mem - Free memory for vhost 4539 * @vhost: ibmvfc host struct 4540 * 4541 * Return value: 4542 * none 4543 **/ 4544static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4545{ 4546 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4547 4548 ENTER; 4549 mempool_destroy(vhost->tgt_pool); 4550 kfree(vhost->trace); 4551 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4552 vhost->disc_buf_dma); 4553 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4554 vhost->login_buf, vhost->login_buf_dma); 4555 dma_pool_destroy(vhost->sg_pool); 4556 dma_unmap_single(vhost->dev, async_q->msg_token, 4557 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4558 free_page((unsigned long)async_q->msgs); 4559 LEAVE; 4560} 4561 4562/** 4563 * ibmvfc_alloc_mem - Allocate memory for vhost 4564 * @vhost: ibmvfc host struct 4565 * 4566 * Return value: 4567 * 0 on success / non-zero on failure 4568 **/ 4569static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4570{ 4571 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4572 struct device *dev = vhost->dev; 4573 4574 ENTER; 4575 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4576 if (!async_q->msgs) { 4577 dev_err(dev, "Couldn't allocate async queue.\n"); 4578 goto nomem; 4579 } 4580 4581 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4582 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4583 async_q->size * sizeof(*async_q->msgs), 4584 DMA_BIDIRECTIONAL); 4585 4586 if (dma_mapping_error(dev, async_q->msg_token)) { 4587 dev_err(dev, "Failed to map async queue\n"); 4588 goto free_async_crq; 4589 } 4590 4591 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4592 SG_ALL * sizeof(struct srp_direct_buf), 4593 sizeof(struct srp_direct_buf), 0); 4594 4595 if (!vhost->sg_pool) { 4596 dev_err(dev, "Failed to allocate sg pool\n"); 4597 goto unmap_async_crq; 4598 } 4599 4600 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4601 &vhost->login_buf_dma, GFP_KERNEL); 4602 4603 if (!vhost->login_buf) { 4604 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4605 goto free_sg_pool; 4606 } 4607 4608 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4609 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4610 &vhost->disc_buf_dma, GFP_KERNEL); 4611 4612 if (!vhost->disc_buf) { 4613 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4614 goto free_login_buffer; 4615 } 4616 4617 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4618 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4619 4620 if (!vhost->trace) 4621 goto free_disc_buffer; 4622 4623 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4624 sizeof(struct ibmvfc_target)); 4625 4626 if (!vhost->tgt_pool) { 4627 dev_err(dev, "Couldn't allocate target memory pool\n"); 4628 goto free_trace; 4629 } 4630 4631 LEAVE; 4632 return 0; 4633 4634free_trace: 4635 kfree(vhost->trace); 4636free_disc_buffer: 4637 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4638 vhost->disc_buf_dma); 4639free_login_buffer: 4640 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4641 vhost->login_buf, vhost->login_buf_dma); 4642free_sg_pool: 4643 dma_pool_destroy(vhost->sg_pool); 4644unmap_async_crq: 4645 dma_unmap_single(dev, async_q->msg_token, 4646 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4647free_async_crq: 4648 free_page((unsigned long)async_q->msgs); 4649nomem: 4650 LEAVE; 4651 return -ENOMEM; 4652} 4653 4654/** 4655 * ibmvfc_rport_add_thread - Worker thread for rport adds 4656 * @work: work struct 4657 * 4658 **/ 4659static void ibmvfc_rport_add_thread(struct work_struct *work) 4660{ 4661 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4662 rport_add_work_q); 4663 struct ibmvfc_target *tgt; 4664 struct fc_rport *rport; 4665 unsigned long flags; 4666 int did_work; 4667 4668 ENTER; 4669 spin_lock_irqsave(vhost->host->host_lock, flags); 4670 do { 4671 did_work = 0; 4672 if (vhost->state != IBMVFC_ACTIVE) 4673 break; 4674 4675 list_for_each_entry(tgt, &vhost->targets, queue) { 4676 if (tgt->add_rport) { 4677 did_work = 1; 4678 tgt->add_rport = 0; 4679 kref_get(&tgt->kref); 4680 rport = tgt->rport; 4681 if (!rport) { 4682 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4683 ibmvfc_tgt_add_rport(tgt); 4684 } else if (get_device(&rport->dev)) { 4685 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4686 tgt_dbg(tgt, "Setting rport roles\n"); 4687 fc_remote_port_rolechg(rport, tgt->ids.roles); 4688 put_device(&rport->dev); 4689 } 4690 4691 kref_put(&tgt->kref, ibmvfc_release_tgt); 4692 spin_lock_irqsave(vhost->host->host_lock, flags); 4693 break; 4694 } 4695 } 4696 } while(did_work); 4697 4698 if (vhost->state == IBMVFC_ACTIVE) 4699 vhost->scan_complete = 1; 4700 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4701 LEAVE; 4702} 4703 4704/** 4705 * ibmvfc_probe - Adapter hot plug add entry point 4706 * @vdev: vio device struct 4707 * @id: vio device id struct 4708 * 4709 * Return value: 4710 * 0 on success / non-zero on failure 4711 **/ 4712static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4713{ 4714 struct ibmvfc_host *vhost; 4715 struct Scsi_Host *shost; 4716 struct device *dev = &vdev->dev; 4717 int rc = -ENOMEM; 4718 4719 ENTER; 4720 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4721 if (!shost) { 4722 dev_err(dev, "Couldn't allocate host data\n"); 4723 goto out; 4724 } 4725 4726 shost->transportt = ibmvfc_transport_template; 4727 shost->can_queue = max_requests; 4728 shost->max_lun = max_lun; 4729 shost->max_id = max_targets; 4730 shost->max_sectors = IBMVFC_MAX_SECTORS; 4731 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4732 shost->unique_id = shost->host_no; 4733 4734 vhost = shost_priv(shost); 4735 INIT_LIST_HEAD(&vhost->sent); 4736 INIT_LIST_HEAD(&vhost->free); 4737 INIT_LIST_HEAD(&vhost->targets); 4738 sprintf(vhost->name, IBMVFC_NAME); 4739 vhost->host = shost; 4740 vhost->dev = dev; 4741 vhost->partition_number = -1; 4742 vhost->log_level = log_level; 4743 vhost->task_set = 1; 4744 strcpy(vhost->partition_name, "UNKNOWN"); 4745 init_waitqueue_head(&vhost->work_wait_q); 4746 init_waitqueue_head(&vhost->init_wait_q); 4747 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4748 mutex_init(&vhost->passthru_mutex); 4749 4750 if ((rc = ibmvfc_alloc_mem(vhost))) 4751 goto free_scsi_host; 4752 4753 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4754 shost->host_no); 4755 4756 if (IS_ERR(vhost->work_thread)) { 4757 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4758 PTR_ERR(vhost->work_thread)); 4759 goto free_host_mem; 4760 } 4761 4762 if ((rc = ibmvfc_init_crq(vhost))) { 4763 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4764 goto kill_kthread; 4765 } 4766 4767 if ((rc = ibmvfc_init_event_pool(vhost))) { 4768 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4769 goto release_crq; 4770 } 4771 4772 if ((rc = scsi_add_host(shost, dev))) 4773 goto release_event_pool; 4774 4775 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4776 &ibmvfc_trace_attr))) { 4777 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4778 goto remove_shost; 4779 } 4780 4781 if (shost_to_fc_host(shost)->rqst_q) 4782 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 4783 dev_set_drvdata(dev, vhost); 4784 spin_lock(&ibmvfc_driver_lock); 4785 list_add_tail(&vhost->queue, &ibmvfc_head); 4786 spin_unlock(&ibmvfc_driver_lock); 4787 4788 ibmvfc_send_crq_init(vhost); 4789 scsi_scan_host(shost); 4790 return 0; 4791 4792remove_shost: 4793 scsi_remove_host(shost); 4794release_event_pool: 4795 ibmvfc_free_event_pool(vhost); 4796release_crq: 4797 ibmvfc_release_crq_queue(vhost); 4798kill_kthread: 4799 kthread_stop(vhost->work_thread); 4800free_host_mem: 4801 ibmvfc_free_mem(vhost); 4802free_scsi_host: 4803 scsi_host_put(shost); 4804out: 4805 LEAVE; 4806 return rc; 4807} 4808 4809/** 4810 * ibmvfc_remove - Adapter hot plug remove entry point 4811 * @vdev: vio device struct 4812 * 4813 * Return value: 4814 * 0 4815 **/ 4816static int ibmvfc_remove(struct vio_dev *vdev) 4817{ 4818 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4819 unsigned long flags; 4820 4821 ENTER; 4822 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4823 4824 spin_lock_irqsave(vhost->host->host_lock, flags); 4825 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4826 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4827 4828 ibmvfc_wait_while_resetting(vhost); 4829 ibmvfc_release_crq_queue(vhost); 4830 kthread_stop(vhost->work_thread); 4831 fc_remove_host(vhost->host); 4832 scsi_remove_host(vhost->host); 4833 4834 spin_lock_irqsave(vhost->host->host_lock, flags); 4835 ibmvfc_purge_requests(vhost, DID_ERROR); 4836 ibmvfc_free_event_pool(vhost); 4837 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4838 4839 ibmvfc_free_mem(vhost); 4840 spin_lock(&ibmvfc_driver_lock); 4841 list_del(&vhost->queue); 4842 spin_unlock(&ibmvfc_driver_lock); 4843 scsi_host_put(vhost->host); 4844 LEAVE; 4845 return 0; 4846} 4847 4848/** 4849 * ibmvfc_resume - Resume from suspend 4850 * @dev: device struct 4851 * 4852 * We may have lost an interrupt across suspend/resume, so kick the 4853 * interrupt handler 4854 * 4855 */ 4856static int ibmvfc_resume(struct device *dev) 4857{ 4858 unsigned long flags; 4859 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 4860 struct vio_dev *vdev = to_vio_dev(dev); 4861 4862 spin_lock_irqsave(vhost->host->host_lock, flags); 4863 vio_disable_interrupts(vdev); 4864 tasklet_schedule(&vhost->tasklet); 4865 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4866 return 0; 4867} 4868 4869/** 4870 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4871 * @vdev: vio device struct 4872 * 4873 * Return value: 4874 * Number of bytes the driver will need to DMA map at the same time in 4875 * order to perform well. 4876 */ 4877static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4878{ 4879 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4880 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4881} 4882 4883static struct vio_device_id ibmvfc_device_table[] __devinitdata = { 4884 {"fcp", "IBM,vfc-client"}, 4885 { "", "" } 4886}; 4887MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4888 4889static struct dev_pm_ops ibmvfc_pm_ops = { 4890 .resume = ibmvfc_resume 4891}; 4892 4893static struct vio_driver ibmvfc_driver = { 4894 .id_table = ibmvfc_device_table, 4895 .probe = ibmvfc_probe, 4896 .remove = ibmvfc_remove, 4897 .get_desired_dma = ibmvfc_get_desired_dma, 4898 .driver = { 4899 .name = IBMVFC_NAME, 4900 .owner = THIS_MODULE, 4901 .pm = &ibmvfc_pm_ops, 4902 } 4903}; 4904 4905static struct fc_function_template ibmvfc_transport_functions = { 4906 .show_host_fabric_name = 1, 4907 .show_host_node_name = 1, 4908 .show_host_port_name = 1, 4909 .show_host_supported_classes = 1, 4910 .show_host_port_type = 1, 4911 .show_host_port_id = 1, 4912 .show_host_maxframe_size = 1, 4913 4914 .get_host_port_state = ibmvfc_get_host_port_state, 4915 .show_host_port_state = 1, 4916 4917 .get_host_speed = ibmvfc_get_host_speed, 4918 .show_host_speed = 1, 4919 4920 .get_host_def_dev_loss_tmo = ibmvfc_set_host_def_dev_loss_tmo, 4921 4922 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4923 .terminate_rport_io = ibmvfc_terminate_rport_io, 4924 4925 .show_rport_maxframe_size = 1, 4926 .show_rport_supported_classes = 1, 4927 4928 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4929 .show_rport_dev_loss_tmo = 1, 4930 4931 .get_starget_node_name = ibmvfc_get_starget_node_name, 4932 .show_starget_node_name = 1, 4933 4934 .get_starget_port_name = ibmvfc_get_starget_port_name, 4935 .show_starget_port_name = 1, 4936 4937 .get_starget_port_id = ibmvfc_get_starget_port_id, 4938 .show_starget_port_id = 1, 4939 4940 .bsg_request = ibmvfc_bsg_request, 4941 .bsg_timeout = ibmvfc_bsg_timeout, 4942}; 4943 4944/** 4945 * ibmvfc_module_init - Initialize the ibmvfc module 4946 * 4947 * Return value: 4948 * 0 on success / other on failure 4949 **/ 4950static int __init ibmvfc_module_init(void) 4951{ 4952 int rc; 4953 4954 if (!firmware_has_feature(FW_FEATURE_VIO)) 4955 return -ENODEV; 4956 4957 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4958 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4959 4960 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4961 if (!ibmvfc_transport_template) 4962 return -ENOMEM; 4963 4964 rc = vio_register_driver(&ibmvfc_driver); 4965 if (rc) 4966 fc_release_transport(ibmvfc_transport_template); 4967 return rc; 4968} 4969 4970/** 4971 * ibmvfc_module_exit - Teardown the ibmvfc module 4972 * 4973 * Return value: 4974 * nothing 4975 **/ 4976static void __exit ibmvfc_module_exit(void) 4977{ 4978 vio_unregister_driver(&ibmvfc_driver); 4979 fc_release_transport(ibmvfc_transport_template); 4980} 4981 4982module_init(ibmvfc_module_init); 4983module_exit(ibmvfc_module_exit); 4984