ibmvfc.c revision a5110f2983bdf931d9819f88505775b16de8b99e
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 ibmvfc_debug = IBMVFC_DEBUG; 54static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 55static LIST_HEAD(ibmvfc_head); 56static DEFINE_SPINLOCK(ibmvfc_driver_lock); 57static struct scsi_transport_template *ibmvfc_transport_template; 58 59MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 60MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 61MODULE_LICENSE("GPL"); 62MODULE_VERSION(IBMVFC_DRIVER_VERSION); 63 64module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 65MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 66 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 67module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 68MODULE_PARM_DESC(default_timeout, 69 "Default timeout in seconds for initialization and EH commands. " 70 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 71module_param_named(max_requests, max_requests, uint, S_IRUGO); 72MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 73 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 74module_param_named(max_lun, max_lun, uint, S_IRUGO); 75MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 76 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 77module_param_named(max_targets, max_targets, uint, S_IRUGO); 78MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 79 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 80module_param_named(disc_threads, disc_threads, uint, S_IRUGO); 81MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 82 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 83module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 84MODULE_PARM_DESC(debug, "Enable driver debug information. " 85 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 86module_param_named(log_level, log_level, uint, 0); 87MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 88 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 89 90static const struct { 91 u16 status; 92 u16 error; 93 u8 result; 94 u8 retry; 95 int log; 96 char *name; 97} cmd_status [] = { 98 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 99 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 100 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 101 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 102 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 103 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 104 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 105 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 106 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 107 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 108 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 109 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 110 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 111 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 112 113 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 114 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 115 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 116 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 117 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 118 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 119 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 120 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 121 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 122 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 123 124 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 125 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 126 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 128 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 129 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 130 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 131 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 132 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 133 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 134 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 135 136 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 137}; 138 139static void ibmvfc_npiv_login(struct ibmvfc_host *); 140static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 141static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 142static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 143static void ibmvfc_npiv_logout(struct ibmvfc_host *); 144 145static const char *unknown_error = "unknown error"; 146 147#ifdef CONFIG_SCSI_IBMVFC_TRACE 148/** 149 * ibmvfc_trc_start - Log a start trace entry 150 * @evt: ibmvfc event struct 151 * 152 **/ 153static void ibmvfc_trc_start(struct ibmvfc_event *evt) 154{ 155 struct ibmvfc_host *vhost = evt->vhost; 156 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 157 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 158 struct ibmvfc_trace_entry *entry; 159 160 entry = &vhost->trace[vhost->trace_index++]; 161 entry->evt = evt; 162 entry->time = jiffies; 163 entry->fmt = evt->crq.format; 164 entry->type = IBMVFC_TRC_START; 165 166 switch (entry->fmt) { 167 case IBMVFC_CMD_FORMAT: 168 entry->op_code = vfc_cmd->iu.cdb[0]; 169 entry->scsi_id = vfc_cmd->tgt_scsi_id; 170 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 171 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 172 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; 173 break; 174 case IBMVFC_MAD_FORMAT: 175 entry->op_code = mad->opcode; 176 break; 177 default: 178 break; 179 }; 180} 181 182/** 183 * ibmvfc_trc_end - Log an end trace entry 184 * @evt: ibmvfc event struct 185 * 186 **/ 187static void ibmvfc_trc_end(struct ibmvfc_event *evt) 188{ 189 struct ibmvfc_host *vhost = evt->vhost; 190 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 191 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 192 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; 193 194 entry->evt = evt; 195 entry->time = jiffies; 196 entry->fmt = evt->crq.format; 197 entry->type = IBMVFC_TRC_END; 198 199 switch (entry->fmt) { 200 case IBMVFC_CMD_FORMAT: 201 entry->op_code = vfc_cmd->iu.cdb[0]; 202 entry->scsi_id = vfc_cmd->tgt_scsi_id; 203 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 204 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 205 entry->u.end.status = vfc_cmd->status; 206 entry->u.end.error = vfc_cmd->error; 207 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; 208 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; 209 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; 210 break; 211 case IBMVFC_MAD_FORMAT: 212 entry->op_code = mad->opcode; 213 entry->u.end.status = mad->status; 214 break; 215 default: 216 break; 217 218 }; 219} 220 221#else 222#define ibmvfc_trc_start(evt) do { } while (0) 223#define ibmvfc_trc_end(evt) do { } while (0) 224#endif 225 226/** 227 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 228 * @status: status / error class 229 * @error: error 230 * 231 * Return value: 232 * index into cmd_status / -EINVAL on failure 233 **/ 234static int ibmvfc_get_err_index(u16 status, u16 error) 235{ 236 int i; 237 238 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 239 if ((cmd_status[i].status & status) == cmd_status[i].status && 240 cmd_status[i].error == error) 241 return i; 242 243 return -EINVAL; 244} 245 246/** 247 * ibmvfc_get_cmd_error - Find the error description for the fcp response 248 * @status: status / error class 249 * @error: error 250 * 251 * Return value: 252 * error description string 253 **/ 254static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 255{ 256 int rc = ibmvfc_get_err_index(status, error); 257 if (rc >= 0) 258 return cmd_status[rc].name; 259 return unknown_error; 260} 261 262/** 263 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 264 * @vfc_cmd: ibmvfc command struct 265 * 266 * Return value: 267 * SCSI result value to return for completed command 268 **/ 269static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) 270{ 271 int err; 272 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 273 int fc_rsp_len = rsp->fcp_rsp_len; 274 275 if ((rsp->flags & FCP_RSP_LEN_VALID) && 276 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 277 rsp->data.info.rsp_code)) 278 return DID_ERROR << 16; 279 280 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 281 if (err >= 0) 282 return rsp->scsi_status | (cmd_status[err].result << 16); 283 return rsp->scsi_status | (DID_ERROR << 16); 284} 285 286/** 287 * ibmvfc_retry_cmd - Determine if error status is retryable 288 * @status: status / error class 289 * @error: error 290 * 291 * Return value: 292 * 1 if error should be retried / 0 if it should not 293 **/ 294static int ibmvfc_retry_cmd(u16 status, u16 error) 295{ 296 int rc = ibmvfc_get_err_index(status, error); 297 298 if (rc >= 0) 299 return cmd_status[rc].retry; 300 return 1; 301} 302 303static const char *unknown_fc_explain = "unknown fc explain"; 304 305static const struct { 306 u16 fc_explain; 307 char *name; 308} ls_explain [] = { 309 { 0x00, "no additional explanation" }, 310 { 0x01, "service parameter error - options" }, 311 { 0x03, "service parameter error - initiator control" }, 312 { 0x05, "service parameter error - recipient control" }, 313 { 0x07, "service parameter error - received data field size" }, 314 { 0x09, "service parameter error - concurrent seq" }, 315 { 0x0B, "service parameter error - credit" }, 316 { 0x0D, "invalid N_Port/F_Port_Name" }, 317 { 0x0E, "invalid node/Fabric Name" }, 318 { 0x0F, "invalid common service parameters" }, 319 { 0x11, "invalid association header" }, 320 { 0x13, "association header required" }, 321 { 0x15, "invalid originator S_ID" }, 322 { 0x17, "invalid OX_ID-RX-ID combination" }, 323 { 0x19, "command (request) already in progress" }, 324 { 0x1E, "N_Port Login requested" }, 325 { 0x1F, "Invalid N_Port_ID" }, 326}; 327 328static const struct { 329 u16 fc_explain; 330 char *name; 331} gs_explain [] = { 332 { 0x00, "no additional explanation" }, 333 { 0x01, "port identifier not registered" }, 334 { 0x02, "port name not registered" }, 335 { 0x03, "node name not registered" }, 336 { 0x04, "class of service not registered" }, 337 { 0x06, "initial process associator not registered" }, 338 { 0x07, "FC-4 TYPEs not registered" }, 339 { 0x08, "symbolic port name not registered" }, 340 { 0x09, "symbolic node name not registered" }, 341 { 0x0A, "port type not registered" }, 342 { 0xF0, "authorization exception" }, 343 { 0xF1, "authentication exception" }, 344 { 0xF2, "data base full" }, 345 { 0xF3, "data base empty" }, 346 { 0xF4, "processing request" }, 347 { 0xF5, "unable to verify connection" }, 348 { 0xF6, "devices not in a common zone" }, 349}; 350 351/** 352 * ibmvfc_get_ls_explain - Return the FC Explain description text 353 * @status: FC Explain status 354 * 355 * Returns: 356 * error string 357 **/ 358static const char *ibmvfc_get_ls_explain(u16 status) 359{ 360 int i; 361 362 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 363 if (ls_explain[i].fc_explain == status) 364 return ls_explain[i].name; 365 366 return unknown_fc_explain; 367} 368 369/** 370 * ibmvfc_get_gs_explain - Return the FC Explain description text 371 * @status: FC Explain status 372 * 373 * Returns: 374 * error string 375 **/ 376static const char *ibmvfc_get_gs_explain(u16 status) 377{ 378 int i; 379 380 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 381 if (gs_explain[i].fc_explain == status) 382 return gs_explain[i].name; 383 384 return unknown_fc_explain; 385} 386 387static const struct { 388 enum ibmvfc_fc_type fc_type; 389 char *name; 390} fc_type [] = { 391 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 392 { IBMVFC_PORT_REJECT, "port reject" }, 393 { IBMVFC_LS_REJECT, "ELS reject" }, 394 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 395 { IBMVFC_PORT_BUSY, "port busy" }, 396 { IBMVFC_BASIC_REJECT, "basic reject" }, 397}; 398 399static const char *unknown_fc_type = "unknown fc type"; 400 401/** 402 * ibmvfc_get_fc_type - Return the FC Type description text 403 * @status: FC Type error status 404 * 405 * Returns: 406 * error string 407 **/ 408static const char *ibmvfc_get_fc_type(u16 status) 409{ 410 int i; 411 412 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 413 if (fc_type[i].fc_type == status) 414 return fc_type[i].name; 415 416 return unknown_fc_type; 417} 418 419/** 420 * ibmvfc_set_tgt_action - Set the next init action for the target 421 * @tgt: ibmvfc target struct 422 * @action: action to perform 423 * 424 **/ 425static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 426 enum ibmvfc_target_action action) 427{ 428 switch (tgt->action) { 429 case IBMVFC_TGT_ACTION_DEL_RPORT: 430 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) 431 tgt->action = action; 432 case IBMVFC_TGT_ACTION_DELETED_RPORT: 433 break; 434 default: 435 if (action == IBMVFC_TGT_ACTION_DEL_RPORT) 436 tgt->add_rport = 0; 437 tgt->action = action; 438 break; 439 } 440} 441 442/** 443 * ibmvfc_set_host_state - Set the state for the host 444 * @vhost: ibmvfc host struct 445 * @state: state to set host to 446 * 447 * Returns: 448 * 0 if state changed / non-zero if not changed 449 **/ 450static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 451 enum ibmvfc_host_state state) 452{ 453 int rc = 0; 454 455 switch (vhost->state) { 456 case IBMVFC_HOST_OFFLINE: 457 rc = -EINVAL; 458 break; 459 default: 460 vhost->state = state; 461 break; 462 }; 463 464 return rc; 465} 466 467/** 468 * ibmvfc_set_host_action - Set the next init action for the host 469 * @vhost: ibmvfc host struct 470 * @action: action to perform 471 * 472 **/ 473static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 474 enum ibmvfc_host_action action) 475{ 476 switch (action) { 477 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 478 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 479 vhost->action = action; 480 break; 481 case IBMVFC_HOST_ACTION_LOGO_WAIT: 482 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 483 vhost->action = action; 484 break; 485 case IBMVFC_HOST_ACTION_INIT_WAIT: 486 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 487 vhost->action = action; 488 break; 489 case IBMVFC_HOST_ACTION_QUERY: 490 switch (vhost->action) { 491 case IBMVFC_HOST_ACTION_INIT_WAIT: 492 case IBMVFC_HOST_ACTION_NONE: 493 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 494 vhost->action = action; 495 break; 496 default: 497 break; 498 }; 499 break; 500 case IBMVFC_HOST_ACTION_TGT_INIT: 501 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 502 vhost->action = action; 503 break; 504 case IBMVFC_HOST_ACTION_INIT: 505 case IBMVFC_HOST_ACTION_TGT_DEL: 506 switch (vhost->action) { 507 case IBMVFC_HOST_ACTION_RESET: 508 case IBMVFC_HOST_ACTION_REENABLE: 509 break; 510 default: 511 vhost->action = action; 512 break; 513 }; 514 break; 515 case IBMVFC_HOST_ACTION_LOGO: 516 case IBMVFC_HOST_ACTION_QUERY_TGTS: 517 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 518 case IBMVFC_HOST_ACTION_NONE: 519 case IBMVFC_HOST_ACTION_RESET: 520 case IBMVFC_HOST_ACTION_REENABLE: 521 default: 522 vhost->action = action; 523 break; 524 }; 525} 526 527/** 528 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 529 * @vhost: ibmvfc host struct 530 * 531 * Return value: 532 * nothing 533 **/ 534static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 535{ 536 if (vhost->action == IBMVFC_HOST_ACTION_NONE) { 537 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 538 scsi_block_requests(vhost->host); 539 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 540 } 541 } else 542 vhost->reinit = 1; 543 544 wake_up(&vhost->work_wait_q); 545} 546 547/** 548 * ibmvfc_link_down - Handle a link down event from the adapter 549 * @vhost: ibmvfc host struct 550 * @state: ibmvfc host state to enter 551 * 552 **/ 553static void ibmvfc_link_down(struct ibmvfc_host *vhost, 554 enum ibmvfc_host_state state) 555{ 556 struct ibmvfc_target *tgt; 557 558 ENTER; 559 scsi_block_requests(vhost->host); 560 list_for_each_entry(tgt, &vhost->targets, queue) 561 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 562 ibmvfc_set_host_state(vhost, state); 563 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 564 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 565 wake_up(&vhost->work_wait_q); 566 LEAVE; 567} 568 569/** 570 * ibmvfc_init_host - Start host initialization 571 * @vhost: ibmvfc host struct 572 * 573 * Return value: 574 * nothing 575 **/ 576static void ibmvfc_init_host(struct ibmvfc_host *vhost) 577{ 578 struct ibmvfc_target *tgt; 579 580 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 581 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 582 dev_err(vhost->dev, 583 "Host initialization retries exceeded. Taking adapter offline\n"); 584 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 585 return; 586 } 587 } 588 589 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 590 memset(vhost->async_crq.msgs, 0, PAGE_SIZE); 591 vhost->async_crq.cur = 0; 592 593 list_for_each_entry(tgt, &vhost->targets, queue) 594 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 595 scsi_block_requests(vhost->host); 596 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 597 vhost->job_step = ibmvfc_npiv_login; 598 wake_up(&vhost->work_wait_q); 599 } 600} 601 602/** 603 * ibmvfc_send_crq - Send a CRQ 604 * @vhost: ibmvfc host struct 605 * @word1: the first 64 bits of the data 606 * @word2: the second 64 bits of the data 607 * 608 * Return value: 609 * 0 on success / other on failure 610 **/ 611static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 612{ 613 struct vio_dev *vdev = to_vio_dev(vhost->dev); 614 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 615} 616 617/** 618 * ibmvfc_send_crq_init - Send a CRQ init message 619 * @vhost: ibmvfc host struct 620 * 621 * Return value: 622 * 0 on success / other on failure 623 **/ 624static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 625{ 626 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 627 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 628} 629 630/** 631 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 632 * @vhost: ibmvfc host struct 633 * 634 * Return value: 635 * 0 on success / other on failure 636 **/ 637static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 638{ 639 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 640 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 641} 642 643/** 644 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 645 * @vhost: ibmvfc host struct 646 * 647 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 648 * the crq with the hypervisor. 649 **/ 650static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 651{ 652 long rc = 0; 653 struct vio_dev *vdev = to_vio_dev(vhost->dev); 654 struct ibmvfc_crq_queue *crq = &vhost->crq; 655 656 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 657 free_irq(vdev->irq, vhost); 658 tasklet_kill(&vhost->tasklet); 659 do { 660 if (rc) 661 msleep(100); 662 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 663 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 664 665 vhost->state = IBMVFC_NO_CRQ; 666 vhost->logged_in = 0; 667 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 668 free_page((unsigned long)crq->msgs); 669} 670 671/** 672 * ibmvfc_reenable_crq_queue - reenables the CRQ 673 * @vhost: ibmvfc host struct 674 * 675 * Return value: 676 * 0 on success / other on failure 677 **/ 678static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 679{ 680 int rc = 0; 681 struct vio_dev *vdev = to_vio_dev(vhost->dev); 682 683 /* Re-enable the CRQ */ 684 do { 685 if (rc) 686 msleep(100); 687 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 688 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 689 690 if (rc) 691 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 692 693 return rc; 694} 695 696/** 697 * ibmvfc_reset_crq - resets a crq after a failure 698 * @vhost: ibmvfc host struct 699 * 700 * Return value: 701 * 0 on success / other on failure 702 **/ 703static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 704{ 705 int rc = 0; 706 unsigned long flags; 707 struct vio_dev *vdev = to_vio_dev(vhost->dev); 708 struct ibmvfc_crq_queue *crq = &vhost->crq; 709 710 /* Close the CRQ */ 711 do { 712 if (rc) 713 msleep(100); 714 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 715 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 716 717 spin_lock_irqsave(vhost->host->host_lock, flags); 718 vhost->state = IBMVFC_NO_CRQ; 719 vhost->logged_in = 0; 720 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 721 722 /* Clean out the queue */ 723 memset(crq->msgs, 0, PAGE_SIZE); 724 crq->cur = 0; 725 726 /* And re-open it again */ 727 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 728 crq->msg_token, PAGE_SIZE); 729 730 if (rc == H_CLOSED) 731 /* Adapter is good, but other end is not ready */ 732 dev_warn(vhost->dev, "Partner adapter not ready\n"); 733 else if (rc != 0) 734 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 735 spin_unlock_irqrestore(vhost->host->host_lock, flags); 736 737 return rc; 738} 739 740/** 741 * ibmvfc_valid_event - Determines if event is valid. 742 * @pool: event_pool that contains the event 743 * @evt: ibmvfc event to be checked for validity 744 * 745 * Return value: 746 * 1 if event is valid / 0 if event is not valid 747 **/ 748static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 749 struct ibmvfc_event *evt) 750{ 751 int index = evt - pool->events; 752 if (index < 0 || index >= pool->size) /* outside of bounds */ 753 return 0; 754 if (evt != pool->events + index) /* unaligned */ 755 return 0; 756 return 1; 757} 758 759/** 760 * ibmvfc_free_event - Free the specified event 761 * @evt: ibmvfc_event to be freed 762 * 763 **/ 764static void ibmvfc_free_event(struct ibmvfc_event *evt) 765{ 766 struct ibmvfc_host *vhost = evt->vhost; 767 struct ibmvfc_event_pool *pool = &vhost->pool; 768 769 BUG_ON(!ibmvfc_valid_event(pool, evt)); 770 BUG_ON(atomic_inc_return(&evt->free) != 1); 771 list_add_tail(&evt->queue, &vhost->free); 772} 773 774/** 775 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 776 * @evt: ibmvfc event struct 777 * 778 * This function does not setup any error status, that must be done 779 * before this function gets called. 780 **/ 781static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 782{ 783 struct scsi_cmnd *cmnd = evt->cmnd; 784 785 if (cmnd) { 786 scsi_dma_unmap(cmnd); 787 cmnd->scsi_done(cmnd); 788 } 789 790 if (evt->eh_comp) 791 complete(evt->eh_comp); 792 793 ibmvfc_free_event(evt); 794} 795 796/** 797 * ibmvfc_fail_request - Fail request with specified error code 798 * @evt: ibmvfc event struct 799 * @error_code: error code to fail request with 800 * 801 * Return value: 802 * none 803 **/ 804static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 805{ 806 if (evt->cmnd) { 807 evt->cmnd->result = (error_code << 16); 808 evt->done = ibmvfc_scsi_eh_done; 809 } else 810 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; 811 812 list_del(&evt->queue); 813 del_timer(&evt->timer); 814 ibmvfc_trc_end(evt); 815 evt->done(evt); 816} 817 818/** 819 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 820 * @vhost: ibmvfc host struct 821 * @error_code: error code to fail requests with 822 * 823 * Return value: 824 * none 825 **/ 826static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 827{ 828 struct ibmvfc_event *evt, *pos; 829 830 ibmvfc_dbg(vhost, "Purging all requests\n"); 831 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 832 ibmvfc_fail_request(evt, error_code); 833} 834 835/** 836 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 837 * @vhost: struct ibmvfc host to reset 838 **/ 839static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 840{ 841 ibmvfc_purge_requests(vhost, DID_ERROR); 842 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 843 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 844} 845 846/** 847 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 848 * @vhost: struct ibmvfc host to reset 849 **/ 850static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 851{ 852 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 853 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 854 scsi_block_requests(vhost->host); 855 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 856 vhost->job_step = ibmvfc_npiv_logout; 857 wake_up(&vhost->work_wait_q); 858 } else 859 ibmvfc_hard_reset_host(vhost); 860} 861 862/** 863 * ibmvfc_reset_host - Reset the connection to the server 864 * @vhost: ibmvfc host struct 865 **/ 866static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 867{ 868 unsigned long flags; 869 870 spin_lock_irqsave(vhost->host->host_lock, flags); 871 __ibmvfc_reset_host(vhost); 872 spin_unlock_irqrestore(vhost->host->host_lock, flags); 873} 874 875/** 876 * ibmvfc_retry_host_init - Retry host initialization if allowed 877 * @vhost: ibmvfc host struct 878 * 879 * Returns: 1 if init will be retried / 0 if not 880 * 881 **/ 882static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 883{ 884 int retry = 0; 885 886 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 887 vhost->delay_init = 1; 888 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 889 dev_err(vhost->dev, 890 "Host initialization retries exceeded. Taking adapter offline\n"); 891 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 892 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 893 __ibmvfc_reset_host(vhost); 894 else { 895 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 896 retry = 1; 897 } 898 } 899 900 wake_up(&vhost->work_wait_q); 901 return retry; 902} 903 904/** 905 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 906 * @starget: scsi target struct 907 * 908 * Return value: 909 * ibmvfc_target struct / NULL if not found 910 **/ 911static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 912{ 913 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 914 struct ibmvfc_host *vhost = shost_priv(shost); 915 struct ibmvfc_target *tgt; 916 917 list_for_each_entry(tgt, &vhost->targets, queue) 918 if (tgt->target_id == starget->id) { 919 kref_get(&tgt->kref); 920 return tgt; 921 } 922 return NULL; 923} 924 925/** 926 * ibmvfc_get_target - Find the specified scsi_target 927 * @starget: scsi target struct 928 * 929 * Return value: 930 * ibmvfc_target struct / NULL if not found 931 **/ 932static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 933{ 934 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 935 struct ibmvfc_target *tgt; 936 unsigned long flags; 937 938 spin_lock_irqsave(shost->host_lock, flags); 939 tgt = __ibmvfc_get_target(starget); 940 spin_unlock_irqrestore(shost->host_lock, flags); 941 return tgt; 942} 943 944/** 945 * ibmvfc_get_host_speed - Get host port speed 946 * @shost: scsi host struct 947 * 948 * Return value: 949 * none 950 **/ 951static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 952{ 953 struct ibmvfc_host *vhost = shost_priv(shost); 954 unsigned long flags; 955 956 spin_lock_irqsave(shost->host_lock, flags); 957 if (vhost->state == IBMVFC_ACTIVE) { 958 switch (vhost->login_buf->resp.link_speed / 100) { 959 case 1: 960 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 961 break; 962 case 2: 963 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 964 break; 965 case 4: 966 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 967 break; 968 case 8: 969 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 970 break; 971 case 10: 972 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 973 break; 974 case 16: 975 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 976 break; 977 default: 978 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 979 vhost->login_buf->resp.link_speed / 100); 980 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 981 break; 982 } 983 } else 984 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 985 spin_unlock_irqrestore(shost->host_lock, flags); 986} 987 988/** 989 * ibmvfc_get_host_port_state - Get host port state 990 * @shost: scsi host struct 991 * 992 * Return value: 993 * none 994 **/ 995static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 996{ 997 struct ibmvfc_host *vhost = shost_priv(shost); 998 unsigned long flags; 999 1000 spin_lock_irqsave(shost->host_lock, flags); 1001 switch (vhost->state) { 1002 case IBMVFC_INITIALIZING: 1003 case IBMVFC_ACTIVE: 1004 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 1005 break; 1006 case IBMVFC_LINK_DOWN: 1007 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 1008 break; 1009 case IBMVFC_LINK_DEAD: 1010 case IBMVFC_HOST_OFFLINE: 1011 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1012 break; 1013 case IBMVFC_HALTED: 1014 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1015 break; 1016 case IBMVFC_NO_CRQ: 1017 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1018 break; 1019 default: 1020 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1021 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1022 break; 1023 } 1024 spin_unlock_irqrestore(shost->host_lock, flags); 1025} 1026 1027/** 1028 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1029 * @rport: rport struct 1030 * @timeout: timeout value 1031 * 1032 * Return value: 1033 * none 1034 **/ 1035static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1036{ 1037 if (timeout) 1038 rport->dev_loss_tmo = timeout; 1039 else 1040 rport->dev_loss_tmo = 1; 1041} 1042 1043/** 1044 * ibmvfc_release_tgt - Free memory allocated for a target 1045 * @kref: kref struct 1046 * 1047 **/ 1048static void ibmvfc_release_tgt(struct kref *kref) 1049{ 1050 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1051 kfree(tgt); 1052} 1053 1054/** 1055 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1056 * @starget: scsi target struct 1057 * 1058 * Return value: 1059 * none 1060 **/ 1061static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1062{ 1063 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1064 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1065 if (tgt) 1066 kref_put(&tgt->kref, ibmvfc_release_tgt); 1067} 1068 1069/** 1070 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1071 * @starget: scsi target struct 1072 * 1073 * Return value: 1074 * none 1075 **/ 1076static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1077{ 1078 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1079 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1080 if (tgt) 1081 kref_put(&tgt->kref, ibmvfc_release_tgt); 1082} 1083 1084/** 1085 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1086 * @starget: scsi target struct 1087 * 1088 * Return value: 1089 * none 1090 **/ 1091static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1092{ 1093 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1094 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1095 if (tgt) 1096 kref_put(&tgt->kref, ibmvfc_release_tgt); 1097} 1098 1099/** 1100 * ibmvfc_wait_while_resetting - Wait while the host resets 1101 * @vhost: ibmvfc host struct 1102 * 1103 * Return value: 1104 * 0 on success / other on failure 1105 **/ 1106static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1107{ 1108 long timeout = wait_event_timeout(vhost->init_wait_q, 1109 ((vhost->state == IBMVFC_ACTIVE || 1110 vhost->state == IBMVFC_HOST_OFFLINE || 1111 vhost->state == IBMVFC_LINK_DEAD) && 1112 vhost->action == IBMVFC_HOST_ACTION_NONE), 1113 (init_timeout * HZ)); 1114 1115 return timeout ? 0 : -EIO; 1116} 1117 1118/** 1119 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1120 * @shost: scsi host struct 1121 * 1122 * Return value: 1123 * 0 on success / other on failure 1124 **/ 1125static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1126{ 1127 struct ibmvfc_host *vhost = shost_priv(shost); 1128 1129 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1130 ibmvfc_reset_host(vhost); 1131 return ibmvfc_wait_while_resetting(vhost); 1132} 1133 1134/** 1135 * ibmvfc_gather_partition_info - Gather info about the LPAR 1136 * 1137 * Return value: 1138 * none 1139 **/ 1140static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1141{ 1142 struct device_node *rootdn; 1143 const char *name; 1144 const unsigned int *num; 1145 1146 rootdn = of_find_node_by_path("/"); 1147 if (!rootdn) 1148 return; 1149 1150 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1151 if (name) 1152 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1153 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1154 if (num) 1155 vhost->partition_number = *num; 1156 of_node_put(rootdn); 1157} 1158 1159/** 1160 * ibmvfc_set_login_info - Setup info for NPIV login 1161 * @vhost: ibmvfc host struct 1162 * 1163 * Return value: 1164 * none 1165 **/ 1166static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1167{ 1168 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1169 struct device_node *of_node = vhost->dev->of_node; 1170 const char *location; 1171 1172 memset(login_info, 0, sizeof(*login_info)); 1173 1174 login_info->ostype = IBMVFC_OS_LINUX; 1175 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; 1176 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); 1177 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); 1178 login_info->partition_num = vhost->partition_number; 1179 login_info->vfc_frame_version = 1; 1180 login_info->fcp_version = 3; 1181 login_info->flags = IBMVFC_FLUSH_ON_HALT; 1182 if (vhost->client_migrated) 1183 login_info->flags |= IBMVFC_CLIENT_MIGRATED; 1184 1185 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1186 login_info->capabilities = IBMVFC_CAN_MIGRATE; 1187 login_info->async.va = vhost->async_crq.msg_token; 1188 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); 1189 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1190 strncpy(login_info->device_name, 1191 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1192 1193 location = of_get_property(of_node, "ibm,loc-code", NULL); 1194 location = location ? location : dev_name(vhost->dev); 1195 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1196} 1197 1198/** 1199 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1200 * @vhost: ibmvfc host who owns the event pool 1201 * 1202 * Returns zero on success. 1203 **/ 1204static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1205{ 1206 int i; 1207 struct ibmvfc_event_pool *pool = &vhost->pool; 1208 1209 ENTER; 1210 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1211 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1212 if (!pool->events) 1213 return -ENOMEM; 1214 1215 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1216 pool->size * sizeof(*pool->iu_storage), 1217 &pool->iu_token, 0); 1218 1219 if (!pool->iu_storage) { 1220 kfree(pool->events); 1221 return -ENOMEM; 1222 } 1223 1224 for (i = 0; i < pool->size; ++i) { 1225 struct ibmvfc_event *evt = &pool->events[i]; 1226 atomic_set(&evt->free, 1); 1227 evt->crq.valid = 0x80; 1228 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); 1229 evt->xfer_iu = pool->iu_storage + i; 1230 evt->vhost = vhost; 1231 evt->ext_list = NULL; 1232 list_add_tail(&evt->queue, &vhost->free); 1233 } 1234 1235 LEAVE; 1236 return 0; 1237} 1238 1239/** 1240 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1241 * @vhost: ibmvfc host who owns the event pool 1242 * 1243 **/ 1244static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1245{ 1246 int i; 1247 struct ibmvfc_event_pool *pool = &vhost->pool; 1248 1249 ENTER; 1250 for (i = 0; i < pool->size; ++i) { 1251 list_del(&pool->events[i].queue); 1252 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1253 if (pool->events[i].ext_list) 1254 dma_pool_free(vhost->sg_pool, 1255 pool->events[i].ext_list, 1256 pool->events[i].ext_list_token); 1257 } 1258 1259 kfree(pool->events); 1260 dma_free_coherent(vhost->dev, 1261 pool->size * sizeof(*pool->iu_storage), 1262 pool->iu_storage, pool->iu_token); 1263 LEAVE; 1264} 1265 1266/** 1267 * ibmvfc_get_event - Gets the next free event in pool 1268 * @vhost: ibmvfc host struct 1269 * 1270 * Returns a free event from the pool. 1271 **/ 1272static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1273{ 1274 struct ibmvfc_event *evt; 1275 1276 BUG_ON(list_empty(&vhost->free)); 1277 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1278 atomic_set(&evt->free, 0); 1279 list_del(&evt->queue); 1280 return evt; 1281} 1282 1283/** 1284 * ibmvfc_init_event - Initialize fields in an event struct that are always 1285 * required. 1286 * @evt: The event 1287 * @done: Routine to call when the event is responded to 1288 * @format: SRP or MAD format 1289 **/ 1290static void ibmvfc_init_event(struct ibmvfc_event *evt, 1291 void (*done) (struct ibmvfc_event *), u8 format) 1292{ 1293 evt->cmnd = NULL; 1294 evt->sync_iu = NULL; 1295 evt->crq.format = format; 1296 evt->done = done; 1297 evt->eh_comp = NULL; 1298} 1299 1300/** 1301 * ibmvfc_map_sg_list - Initialize scatterlist 1302 * @scmd: scsi command struct 1303 * @nseg: number of scatterlist segments 1304 * @md: memory descriptor list to initialize 1305 **/ 1306static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1307 struct srp_direct_buf *md) 1308{ 1309 int i; 1310 struct scatterlist *sg; 1311 1312 scsi_for_each_sg(scmd, sg, nseg, i) { 1313 md[i].va = sg_dma_address(sg); 1314 md[i].len = sg_dma_len(sg); 1315 md[i].key = 0; 1316 } 1317} 1318 1319/** 1320 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1321 * @scmd: Scsi_Cmnd with the scatterlist 1322 * @evt: ibmvfc event struct 1323 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1324 * @dev: device for which to map dma memory 1325 * 1326 * Returns: 1327 * 0 on success / non-zero on failure 1328 **/ 1329static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1330 struct ibmvfc_event *evt, 1331 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1332{ 1333 1334 int sg_mapped; 1335 struct srp_direct_buf *data = &vfc_cmd->ioba; 1336 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1337 1338 sg_mapped = scsi_dma_map(scmd); 1339 if (!sg_mapped) { 1340 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; 1341 return 0; 1342 } else if (unlikely(sg_mapped < 0)) { 1343 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1344 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1345 return sg_mapped; 1346 } 1347 1348 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1349 vfc_cmd->flags |= IBMVFC_WRITE; 1350 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1351 } else { 1352 vfc_cmd->flags |= IBMVFC_READ; 1353 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1354 } 1355 1356 if (sg_mapped == 1) { 1357 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1358 return 0; 1359 } 1360 1361 vfc_cmd->flags |= IBMVFC_SCATTERLIST; 1362 1363 if (!evt->ext_list) { 1364 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1365 &evt->ext_list_token); 1366 1367 if (!evt->ext_list) { 1368 scsi_dma_unmap(scmd); 1369 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1370 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1371 return -ENOMEM; 1372 } 1373 } 1374 1375 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1376 1377 data->va = evt->ext_list_token; 1378 data->len = sg_mapped * sizeof(struct srp_direct_buf); 1379 data->key = 0; 1380 return 0; 1381} 1382 1383/** 1384 * ibmvfc_timeout - Internal command timeout handler 1385 * @evt: struct ibmvfc_event that timed out 1386 * 1387 * Called when an internally generated command times out 1388 **/ 1389static void ibmvfc_timeout(struct ibmvfc_event *evt) 1390{ 1391 struct ibmvfc_host *vhost = evt->vhost; 1392 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1393 ibmvfc_reset_host(vhost); 1394} 1395 1396/** 1397 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1398 * @evt: event to be sent 1399 * @vhost: ibmvfc host struct 1400 * @timeout: timeout in seconds - 0 means do not time command 1401 * 1402 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1403 **/ 1404static int ibmvfc_send_event(struct ibmvfc_event *evt, 1405 struct ibmvfc_host *vhost, unsigned long timeout) 1406{ 1407 u64 *crq_as_u64 = (u64 *) &evt->crq; 1408 int rc; 1409 1410 /* Copy the IU into the transfer area */ 1411 *evt->xfer_iu = evt->iu; 1412 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1413 evt->xfer_iu->cmd.tag = (u64)evt; 1414 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1415 evt->xfer_iu->mad_common.tag = (u64)evt; 1416 else 1417 BUG(); 1418 1419 list_add_tail(&evt->queue, &vhost->sent); 1420 init_timer(&evt->timer); 1421 1422 if (timeout) { 1423 evt->timer.data = (unsigned long) evt; 1424 evt->timer.expires = jiffies + (timeout * HZ); 1425 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; 1426 add_timer(&evt->timer); 1427 } 1428 1429 mb(); 1430 1431 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { 1432 list_del(&evt->queue); 1433 del_timer(&evt->timer); 1434 1435 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1436 * Firmware will send a CRQ with a transport event (0xFF) to 1437 * tell this client what has happened to the transport. This 1438 * will be handled in ibmvfc_handle_crq() 1439 */ 1440 if (rc == H_CLOSED) { 1441 if (printk_ratelimit()) 1442 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1443 if (evt->cmnd) 1444 scsi_dma_unmap(evt->cmnd); 1445 ibmvfc_free_event(evt); 1446 return SCSI_MLQUEUE_HOST_BUSY; 1447 } 1448 1449 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1450 if (evt->cmnd) { 1451 evt->cmnd->result = DID_ERROR << 16; 1452 evt->done = ibmvfc_scsi_eh_done; 1453 } else 1454 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; 1455 1456 evt->done(evt); 1457 } else 1458 ibmvfc_trc_start(evt); 1459 1460 return 0; 1461} 1462 1463/** 1464 * ibmvfc_log_error - Log an error for the failed command if appropriate 1465 * @evt: ibmvfc event to log 1466 * 1467 **/ 1468static void ibmvfc_log_error(struct ibmvfc_event *evt) 1469{ 1470 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1471 struct ibmvfc_host *vhost = evt->vhost; 1472 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1473 struct scsi_cmnd *cmnd = evt->cmnd; 1474 const char *err = unknown_error; 1475 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 1476 int logerr = 0; 1477 int rsp_code = 0; 1478 1479 if (index >= 0) { 1480 logerr = cmd_status[index].log; 1481 err = cmd_status[index].name; 1482 } 1483 1484 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1485 return; 1486 1487 if (rsp->flags & FCP_RSP_LEN_VALID) 1488 rsp_code = rsp->data.info.rsp_code; 1489 1490 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1491 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1492 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1493 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1494} 1495 1496/** 1497 * ibmvfc_relogin - Log back into the specified device 1498 * @sdev: scsi device struct 1499 * 1500 **/ 1501static void ibmvfc_relogin(struct scsi_device *sdev) 1502{ 1503 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1504 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1505 struct ibmvfc_target *tgt; 1506 1507 list_for_each_entry(tgt, &vhost->targets, queue) { 1508 if (rport == tgt->rport) { 1509 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 1510 break; 1511 } 1512 } 1513 1514 ibmvfc_reinit_host(vhost); 1515} 1516 1517/** 1518 * ibmvfc_scsi_done - Handle responses from commands 1519 * @evt: ibmvfc event to be handled 1520 * 1521 * Used as a callback when sending scsi cmds. 1522 **/ 1523static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1524{ 1525 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1526 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1527 struct scsi_cmnd *cmnd = evt->cmnd; 1528 u32 rsp_len = 0; 1529 u32 sense_len = rsp->fcp_sense_len; 1530 1531 if (cmnd) { 1532 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) 1533 scsi_set_resid(cmnd, vfc_cmd->adapter_resid); 1534 else if (rsp->flags & FCP_RESID_UNDER) 1535 scsi_set_resid(cmnd, rsp->fcp_resid); 1536 else 1537 scsi_set_resid(cmnd, 0); 1538 1539 if (vfc_cmd->status) { 1540 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1541 1542 if (rsp->flags & FCP_RSP_LEN_VALID) 1543 rsp_len = rsp->fcp_rsp_len; 1544 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1545 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1546 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1547 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1548 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED)) 1549 ibmvfc_relogin(cmnd->device); 1550 1551 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1552 cmnd->result = (DID_ERROR << 16); 1553 1554 ibmvfc_log_error(evt); 1555 } 1556 1557 if (!cmnd->result && 1558 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1559 cmnd->result = (DID_ERROR << 16); 1560 1561 scsi_dma_unmap(cmnd); 1562 cmnd->scsi_done(cmnd); 1563 } 1564 1565 if (evt->eh_comp) 1566 complete(evt->eh_comp); 1567 1568 ibmvfc_free_event(evt); 1569} 1570 1571/** 1572 * ibmvfc_host_chkready - Check if the host can accept commands 1573 * @vhost: struct ibmvfc host 1574 * 1575 * Returns: 1576 * 1 if host can accept command / 0 if not 1577 **/ 1578static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1579{ 1580 int result = 0; 1581 1582 switch (vhost->state) { 1583 case IBMVFC_LINK_DEAD: 1584 case IBMVFC_HOST_OFFLINE: 1585 result = DID_NO_CONNECT << 16; 1586 break; 1587 case IBMVFC_NO_CRQ: 1588 case IBMVFC_INITIALIZING: 1589 case IBMVFC_HALTED: 1590 case IBMVFC_LINK_DOWN: 1591 result = DID_REQUEUE << 16; 1592 break; 1593 case IBMVFC_ACTIVE: 1594 result = 0; 1595 break; 1596 }; 1597 1598 return result; 1599} 1600 1601/** 1602 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1603 * @cmnd: struct scsi_cmnd to be executed 1604 * @done: Callback function to be called when cmnd is completed 1605 * 1606 * Returns: 1607 * 0 on success / other on failure 1608 **/ 1609static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, 1610 void (*done) (struct scsi_cmnd *)) 1611{ 1612 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1613 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1614 struct ibmvfc_cmd *vfc_cmd; 1615 struct ibmvfc_event *evt; 1616 u8 tag[2]; 1617 int rc; 1618 1619 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1620 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1621 cmnd->result = rc; 1622 done(cmnd); 1623 return 0; 1624 } 1625 1626 cmnd->result = (DID_OK << 16); 1627 evt = ibmvfc_get_event(vhost); 1628 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1629 evt->cmnd = cmnd; 1630 cmnd->scsi_done = done; 1631 vfc_cmd = &evt->iu.cmd; 1632 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1633 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1634 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); 1635 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; 1636 vfc_cmd->payload_len = sizeof(vfc_cmd->iu); 1637 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); 1638 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; 1639 vfc_cmd->tgt_scsi_id = rport->port_id; 1640 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); 1641 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1642 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1643 1644 if (scsi_populate_tag_msg(cmnd, tag)) { 1645 vfc_cmd->task_tag = tag[1]; 1646 switch (tag[0]) { 1647 case MSG_SIMPLE_TAG: 1648 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1649 break; 1650 case MSG_HEAD_TAG: 1651 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; 1652 break; 1653 case MSG_ORDERED_TAG: 1654 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; 1655 break; 1656 }; 1657 } 1658 1659 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1660 return ibmvfc_send_event(evt, vhost, 0); 1661 1662 ibmvfc_free_event(evt); 1663 if (rc == -ENOMEM) 1664 return SCSI_MLQUEUE_HOST_BUSY; 1665 1666 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1667 scmd_printk(KERN_ERR, cmnd, 1668 "Failed to map DMA buffer for command. rc=%d\n", rc); 1669 1670 cmnd->result = DID_ERROR << 16; 1671 done(cmnd); 1672 return 0; 1673} 1674 1675/** 1676 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1677 * @evt: ibmvfc event struct 1678 * 1679 **/ 1680static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1681{ 1682 /* copy the response back */ 1683 if (evt->sync_iu) 1684 *evt->sync_iu = *evt->xfer_iu; 1685 1686 complete(&evt->comp); 1687} 1688 1689/** 1690 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 1691 * @evt: struct ibmvfc_event 1692 * 1693 **/ 1694static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 1695{ 1696 struct ibmvfc_host *vhost = evt->vhost; 1697 1698 ibmvfc_free_event(evt); 1699 vhost->aborting_passthru = 0; 1700 dev_info(vhost->dev, "Passthru command cancelled\n"); 1701} 1702 1703/** 1704 * ibmvfc_bsg_timeout - Handle a BSG timeout 1705 * @job: struct fc_bsg_job that timed out 1706 * 1707 * Returns: 1708 * 0 on success / other on failure 1709 **/ 1710static int ibmvfc_bsg_timeout(struct fc_bsg_job *job) 1711{ 1712 struct ibmvfc_host *vhost = shost_priv(job->shost); 1713 unsigned long port_id = (unsigned long)job->dd_data; 1714 struct ibmvfc_event *evt; 1715 struct ibmvfc_tmf *tmf; 1716 unsigned long flags; 1717 int rc; 1718 1719 ENTER; 1720 spin_lock_irqsave(vhost->host->host_lock, flags); 1721 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 1722 __ibmvfc_reset_host(vhost); 1723 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1724 return 0; 1725 } 1726 1727 vhost->aborting_passthru = 1; 1728 evt = ibmvfc_get_event(vhost); 1729 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 1730 1731 tmf = &evt->iu.tmf; 1732 memset(tmf, 0, sizeof(*tmf)); 1733 tmf->common.version = 1; 1734 tmf->common.opcode = IBMVFC_TMF_MAD; 1735 tmf->common.length = sizeof(*tmf); 1736 tmf->scsi_id = port_id; 1737 tmf->cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY; 1738 tmf->my_cancel_key = IBMVFC_INTERNAL_CANCEL_KEY; 1739 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1740 1741 if (rc != 0) { 1742 vhost->aborting_passthru = 0; 1743 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 1744 rc = -EIO; 1745 } else 1746 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 1747 port_id); 1748 1749 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1750 1751 LEAVE; 1752 return rc; 1753} 1754 1755/** 1756 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 1757 * @vhost: struct ibmvfc_host to send command 1758 * @port_id: port ID to send command 1759 * 1760 * Returns: 1761 * 0 on success / other on failure 1762 **/ 1763static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 1764{ 1765 struct ibmvfc_port_login *plogi; 1766 struct ibmvfc_target *tgt; 1767 struct ibmvfc_event *evt; 1768 union ibmvfc_iu rsp_iu; 1769 unsigned long flags; 1770 int rc = 0, issue_login = 1; 1771 1772 ENTER; 1773 spin_lock_irqsave(vhost->host->host_lock, flags); 1774 list_for_each_entry(tgt, &vhost->targets, queue) { 1775 if (tgt->scsi_id == port_id) { 1776 issue_login = 0; 1777 break; 1778 } 1779 } 1780 1781 if (!issue_login) 1782 goto unlock_out; 1783 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 1784 goto unlock_out; 1785 1786 evt = ibmvfc_get_event(vhost); 1787 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1788 plogi = &evt->iu.plogi; 1789 memset(plogi, 0, sizeof(*plogi)); 1790 plogi->common.version = 1; 1791 plogi->common.opcode = IBMVFC_PORT_LOGIN; 1792 plogi->common.length = sizeof(*plogi); 1793 plogi->scsi_id = port_id; 1794 evt->sync_iu = &rsp_iu; 1795 init_completion(&evt->comp); 1796 1797 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1798 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1799 1800 if (rc) 1801 return -EIO; 1802 1803 wait_for_completion(&evt->comp); 1804 1805 if (rsp_iu.plogi.common.status) 1806 rc = -EIO; 1807 1808 spin_lock_irqsave(vhost->host->host_lock, flags); 1809 ibmvfc_free_event(evt); 1810unlock_out: 1811 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1812 LEAVE; 1813 return rc; 1814} 1815 1816/** 1817 * ibmvfc_bsg_request - Handle a BSG request 1818 * @job: struct fc_bsg_job to be executed 1819 * 1820 * Returns: 1821 * 0 on success / other on failure 1822 **/ 1823static int ibmvfc_bsg_request(struct fc_bsg_job *job) 1824{ 1825 struct ibmvfc_host *vhost = shost_priv(job->shost); 1826 struct fc_rport *rport = job->rport; 1827 struct ibmvfc_passthru_mad *mad; 1828 struct ibmvfc_event *evt; 1829 union ibmvfc_iu rsp_iu; 1830 unsigned long flags, port_id = -1; 1831 unsigned int code = job->request->msgcode; 1832 int rc = 0, req_seg, rsp_seg, issue_login = 0; 1833 u32 fc_flags, rsp_len; 1834 1835 ENTER; 1836 job->reply->reply_payload_rcv_len = 0; 1837 if (rport) 1838 port_id = rport->port_id; 1839 1840 switch (code) { 1841 case FC_BSG_HST_ELS_NOLOGIN: 1842 port_id = (job->request->rqst_data.h_els.port_id[0] << 16) | 1843 (job->request->rqst_data.h_els.port_id[1] << 8) | 1844 job->request->rqst_data.h_els.port_id[2]; 1845 case FC_BSG_RPT_ELS: 1846 fc_flags = IBMVFC_FC_ELS; 1847 break; 1848 case FC_BSG_HST_CT: 1849 issue_login = 1; 1850 port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) | 1851 (job->request->rqst_data.h_ct.port_id[1] << 8) | 1852 job->request->rqst_data.h_ct.port_id[2]; 1853 case FC_BSG_RPT_CT: 1854 fc_flags = IBMVFC_FC_CT_IU; 1855 break; 1856 default: 1857 return -ENOTSUPP; 1858 }; 1859 1860 if (port_id == -1) 1861 return -EINVAL; 1862 if (!mutex_trylock(&vhost->passthru_mutex)) 1863 return -EBUSY; 1864 1865 job->dd_data = (void *)port_id; 1866 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 1867 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1868 1869 if (!req_seg) { 1870 mutex_unlock(&vhost->passthru_mutex); 1871 return -ENOMEM; 1872 } 1873 1874 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 1875 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1876 1877 if (!rsp_seg) { 1878 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1879 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1880 mutex_unlock(&vhost->passthru_mutex); 1881 return -ENOMEM; 1882 } 1883 1884 if (req_seg > 1 || rsp_seg > 1) { 1885 rc = -EINVAL; 1886 goto out; 1887 } 1888 1889 if (issue_login) 1890 rc = ibmvfc_bsg_plogi(vhost, port_id); 1891 1892 spin_lock_irqsave(vhost->host->host_lock, flags); 1893 1894 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 1895 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1896 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1897 goto out; 1898 } 1899 1900 evt = ibmvfc_get_event(vhost); 1901 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1902 mad = &evt->iu.passthru; 1903 1904 memset(mad, 0, sizeof(*mad)); 1905 mad->common.version = 1; 1906 mad->common.opcode = IBMVFC_PASSTHRU; 1907 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 1908 1909 mad->cmd_ioba.va = (u64)evt->crq.ioba + 1910 offsetof(struct ibmvfc_passthru_mad, iu); 1911 mad->cmd_ioba.len = sizeof(mad->iu); 1912 1913 mad->iu.cmd_len = job->request_payload.payload_len; 1914 mad->iu.rsp_len = job->reply_payload.payload_len; 1915 mad->iu.flags = fc_flags; 1916 mad->iu.cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY; 1917 1918 mad->iu.cmd.va = sg_dma_address(job->request_payload.sg_list); 1919 mad->iu.cmd.len = sg_dma_len(job->request_payload.sg_list); 1920 mad->iu.rsp.va = sg_dma_address(job->reply_payload.sg_list); 1921 mad->iu.rsp.len = sg_dma_len(job->reply_payload.sg_list); 1922 mad->iu.scsi_id = port_id; 1923 mad->iu.tag = (u64)evt; 1924 rsp_len = mad->iu.rsp.len; 1925 1926 evt->sync_iu = &rsp_iu; 1927 init_completion(&evt->comp); 1928 rc = ibmvfc_send_event(evt, vhost, 0); 1929 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1930 1931 if (rc) { 1932 rc = -EIO; 1933 goto out; 1934 } 1935 1936 wait_for_completion(&evt->comp); 1937 1938 if (rsp_iu.passthru.common.status) 1939 rc = -EIO; 1940 else 1941 job->reply->reply_payload_rcv_len = rsp_len; 1942 1943 spin_lock_irqsave(vhost->host->host_lock, flags); 1944 ibmvfc_free_event(evt); 1945 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1946 job->reply->result = rc; 1947 job->job_done(job); 1948 rc = 0; 1949out: 1950 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1951 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1952 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 1953 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1954 mutex_unlock(&vhost->passthru_mutex); 1955 LEAVE; 1956 return rc; 1957} 1958 1959/** 1960 * ibmvfc_reset_device - Reset the device with the specified reset type 1961 * @sdev: scsi device to reset 1962 * @type: reset type 1963 * @desc: reset type description for log messages 1964 * 1965 * Returns: 1966 * 0 on success / other on failure 1967 **/ 1968static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1969{ 1970 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1971 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1972 struct ibmvfc_cmd *tmf; 1973 struct ibmvfc_event *evt = NULL; 1974 union ibmvfc_iu rsp_iu; 1975 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1976 int rsp_rc = -EBUSY; 1977 unsigned long flags; 1978 int rsp_code = 0; 1979 1980 spin_lock_irqsave(vhost->host->host_lock, flags); 1981 if (vhost->state == IBMVFC_ACTIVE) { 1982 evt = ibmvfc_get_event(vhost); 1983 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1984 1985 tmf = &evt->iu.cmd; 1986 memset(tmf, 0, sizeof(*tmf)); 1987 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1988 tmf->resp.len = sizeof(tmf->rsp); 1989 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1990 tmf->payload_len = sizeof(tmf->iu); 1991 tmf->resp_len = sizeof(tmf->rsp); 1992 tmf->cancel_key = (unsigned long)sdev->hostdata; 1993 tmf->tgt_scsi_id = rport->port_id; 1994 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1995 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1996 tmf->iu.tmf_flags = type; 1997 evt->sync_iu = &rsp_iu; 1998 1999 init_completion(&evt->comp); 2000 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2001 } 2002 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2003 2004 if (rsp_rc != 0) { 2005 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 2006 desc, rsp_rc); 2007 return -EIO; 2008 } 2009 2010 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2011 wait_for_completion(&evt->comp); 2012 2013 if (rsp_iu.cmd.status) 2014 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2015 2016 if (rsp_code) { 2017 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2018 rsp_code = fc_rsp->data.info.rsp_code; 2019 2020 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2021 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2022 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 2023 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2024 fc_rsp->scsi_status); 2025 rsp_rc = -EIO; 2026 } else 2027 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2028 2029 spin_lock_irqsave(vhost->host->host_lock, flags); 2030 ibmvfc_free_event(evt); 2031 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2032 return rsp_rc; 2033} 2034 2035/** 2036 * ibmvfc_match_rport - Match function for specified remote port 2037 * @evt: ibmvfc event struct 2038 * @device: device to match (rport) 2039 * 2040 * Returns: 2041 * 1 if event matches rport / 0 if event does not match rport 2042 **/ 2043static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2044{ 2045 struct fc_rport *cmd_rport; 2046 2047 if (evt->cmnd) { 2048 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2049 if (cmd_rport == rport) 2050 return 1; 2051 } 2052 return 0; 2053} 2054 2055/** 2056 * ibmvfc_match_target - Match function for specified target 2057 * @evt: ibmvfc event struct 2058 * @device: device to match (starget) 2059 * 2060 * Returns: 2061 * 1 if event matches starget / 0 if event does not match starget 2062 **/ 2063static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2064{ 2065 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2066 return 1; 2067 return 0; 2068} 2069 2070/** 2071 * ibmvfc_match_lun - Match function for specified LUN 2072 * @evt: ibmvfc event struct 2073 * @device: device to match (sdev) 2074 * 2075 * Returns: 2076 * 1 if event matches sdev / 0 if event does not match sdev 2077 **/ 2078static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2079{ 2080 if (evt->cmnd && evt->cmnd->device == device) 2081 return 1; 2082 return 0; 2083} 2084 2085/** 2086 * ibmvfc_wait_for_ops - Wait for ops to complete 2087 * @vhost: ibmvfc host struct 2088 * @device: device to match (starget or sdev) 2089 * @match: match function 2090 * 2091 * Returns: 2092 * SUCCESS / FAILED 2093 **/ 2094static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2095 int (*match) (struct ibmvfc_event *, void *)) 2096{ 2097 struct ibmvfc_event *evt; 2098 DECLARE_COMPLETION_ONSTACK(comp); 2099 int wait; 2100 unsigned long flags; 2101 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2102 2103 ENTER; 2104 do { 2105 wait = 0; 2106 spin_lock_irqsave(vhost->host->host_lock, flags); 2107 list_for_each_entry(evt, &vhost->sent, queue) { 2108 if (match(evt, device)) { 2109 evt->eh_comp = ∁ 2110 wait++; 2111 } 2112 } 2113 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2114 2115 if (wait) { 2116 timeout = wait_for_completion_timeout(&comp, timeout); 2117 2118 if (!timeout) { 2119 wait = 0; 2120 spin_lock_irqsave(vhost->host->host_lock, flags); 2121 list_for_each_entry(evt, &vhost->sent, queue) { 2122 if (match(evt, device)) { 2123 evt->eh_comp = NULL; 2124 wait++; 2125 } 2126 } 2127 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2128 if (wait) 2129 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2130 LEAVE; 2131 return wait ? FAILED : SUCCESS; 2132 } 2133 } 2134 } while (wait); 2135 2136 LEAVE; 2137 return SUCCESS; 2138} 2139 2140/** 2141 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2142 * @sdev: scsi device to cancel commands 2143 * @type: type of error recovery being performed 2144 * 2145 * This sends a cancel to the VIOS for the specified device. This does 2146 * NOT send any abort to the actual device. That must be done separately. 2147 * 2148 * Returns: 2149 * 0 on success / other on failure 2150 **/ 2151static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2152{ 2153 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2154 struct scsi_target *starget = scsi_target(sdev); 2155 struct fc_rport *rport = starget_to_rport(starget); 2156 struct ibmvfc_tmf *tmf; 2157 struct ibmvfc_event *evt, *found_evt; 2158 union ibmvfc_iu rsp; 2159 int rsp_rc = -EBUSY; 2160 unsigned long flags; 2161 u16 status; 2162 2163 ENTER; 2164 spin_lock_irqsave(vhost->host->host_lock, flags); 2165 found_evt = NULL; 2166 list_for_each_entry(evt, &vhost->sent, queue) { 2167 if (evt->cmnd && evt->cmnd->device == sdev) { 2168 found_evt = evt; 2169 break; 2170 } 2171 } 2172 2173 if (!found_evt) { 2174 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2175 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2176 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2177 return 0; 2178 } 2179 2180 if (vhost->state == IBMVFC_ACTIVE) { 2181 evt = ibmvfc_get_event(vhost); 2182 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2183 2184 tmf = &evt->iu.tmf; 2185 memset(tmf, 0, sizeof(*tmf)); 2186 tmf->common.version = 1; 2187 tmf->common.opcode = IBMVFC_TMF_MAD; 2188 tmf->common.length = sizeof(*tmf); 2189 tmf->scsi_id = rport->port_id; 2190 int_to_scsilun(sdev->lun, &tmf->lun); 2191 tmf->flags = (type | IBMVFC_TMF_LUA_VALID); 2192 tmf->cancel_key = (unsigned long)sdev->hostdata; 2193 tmf->my_cancel_key = (unsigned long)starget->hostdata; 2194 2195 evt->sync_iu = &rsp; 2196 init_completion(&evt->comp); 2197 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2198 } 2199 2200 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2201 2202 if (rsp_rc != 0) { 2203 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2204 return -EIO; 2205 } 2206 2207 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2208 2209 wait_for_completion(&evt->comp); 2210 status = rsp.mad_common.status; 2211 spin_lock_irqsave(vhost->host->host_lock, flags); 2212 ibmvfc_free_event(evt); 2213 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2214 2215 if (status != IBMVFC_MAD_SUCCESS) { 2216 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2217 return -EIO; 2218 } 2219 2220 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2221 return 0; 2222} 2223 2224/** 2225 * ibmvfc_match_key - Match function for specified cancel key 2226 * @evt: ibmvfc event struct 2227 * @key: cancel key to match 2228 * 2229 * Returns: 2230 * 1 if event matches key / 0 if event does not match key 2231 **/ 2232static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2233{ 2234 unsigned long cancel_key = (unsigned long)key; 2235 2236 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2237 evt->iu.cmd.cancel_key == cancel_key) 2238 return 1; 2239 return 0; 2240} 2241 2242/** 2243 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2244 * @sdev: scsi device to abort commands 2245 * 2246 * This sends an Abort Task Set to the VIOS for the specified device. This does 2247 * NOT send any cancel to the VIOS. That must be done separately. 2248 * 2249 * Returns: 2250 * 0 on success / other on failure 2251 **/ 2252static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2253{ 2254 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2255 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2256 struct ibmvfc_cmd *tmf; 2257 struct ibmvfc_event *evt, *found_evt; 2258 union ibmvfc_iu rsp_iu; 2259 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 2260 int rc, rsp_rc = -EBUSY; 2261 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2262 int rsp_code = 0; 2263 2264 spin_lock_irqsave(vhost->host->host_lock, flags); 2265 found_evt = NULL; 2266 list_for_each_entry(evt, &vhost->sent, queue) { 2267 if (evt->cmnd && evt->cmnd->device == sdev) { 2268 found_evt = evt; 2269 break; 2270 } 2271 } 2272 2273 if (!found_evt) { 2274 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2275 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2276 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2277 return 0; 2278 } 2279 2280 if (vhost->state == IBMVFC_ACTIVE) { 2281 evt = ibmvfc_get_event(vhost); 2282 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2283 2284 tmf = &evt->iu.cmd; 2285 memset(tmf, 0, sizeof(*tmf)); 2286 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 2287 tmf->resp.len = sizeof(tmf->rsp); 2288 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 2289 tmf->payload_len = sizeof(tmf->iu); 2290 tmf->resp_len = sizeof(tmf->rsp); 2291 tmf->cancel_key = (unsigned long)sdev->hostdata; 2292 tmf->tgt_scsi_id = rport->port_id; 2293 int_to_scsilun(sdev->lun, &tmf->iu.lun); 2294 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 2295 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 2296 evt->sync_iu = &rsp_iu; 2297 2298 init_completion(&evt->comp); 2299 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2300 } 2301 2302 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2303 2304 if (rsp_rc != 0) { 2305 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2306 return -EIO; 2307 } 2308 2309 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2310 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2311 2312 if (!timeout) { 2313 rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2314 if (!rc) { 2315 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2316 if (rc == SUCCESS) 2317 rc = 0; 2318 } 2319 2320 if (rc) { 2321 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2322 ibmvfc_reset_host(vhost); 2323 rsp_rc = 0; 2324 goto out; 2325 } 2326 } 2327 2328 if (rsp_iu.cmd.status) 2329 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2330 2331 if (rsp_code) { 2332 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2333 rsp_code = fc_rsp->data.info.rsp_code; 2334 2335 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2336 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2337 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 2338 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2339 fc_rsp->scsi_status); 2340 rsp_rc = -EIO; 2341 } else 2342 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2343 2344out: 2345 spin_lock_irqsave(vhost->host->host_lock, flags); 2346 ibmvfc_free_event(evt); 2347 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2348 return rsp_rc; 2349} 2350 2351/** 2352 * ibmvfc_eh_abort_handler - Abort a command 2353 * @cmd: scsi command to abort 2354 * 2355 * Returns: 2356 * SUCCESS / FAILED 2357 **/ 2358static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2359{ 2360 struct scsi_device *sdev = cmd->device; 2361 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2362 int cancel_rc, abort_rc; 2363 int rc = FAILED; 2364 2365 ENTER; 2366 fc_block_scsi_eh(cmd); 2367 ibmvfc_wait_while_resetting(vhost); 2368 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2369 abort_rc = ibmvfc_abort_task_set(sdev); 2370 2371 if (!cancel_rc && !abort_rc) 2372 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2373 2374 LEAVE; 2375 return rc; 2376} 2377 2378/** 2379 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2380 * @cmd: scsi command struct 2381 * 2382 * Returns: 2383 * SUCCESS / FAILED 2384 **/ 2385static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2386{ 2387 struct scsi_device *sdev = cmd->device; 2388 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2389 int cancel_rc, reset_rc; 2390 int rc = FAILED; 2391 2392 ENTER; 2393 fc_block_scsi_eh(cmd); 2394 ibmvfc_wait_while_resetting(vhost); 2395 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2396 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2397 2398 if (!cancel_rc && !reset_rc) 2399 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2400 2401 LEAVE; 2402 return rc; 2403} 2404 2405/** 2406 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2407 * @sdev: scsi device struct 2408 * @data: return code 2409 * 2410 **/ 2411static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2412{ 2413 unsigned long *rc = data; 2414 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2415} 2416 2417/** 2418 * ibmvfc_eh_target_reset_handler - Reset the target 2419 * @cmd: scsi command struct 2420 * 2421 * Returns: 2422 * SUCCESS / FAILED 2423 **/ 2424static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2425{ 2426 struct scsi_device *sdev = cmd->device; 2427 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2428 struct scsi_target *starget = scsi_target(sdev); 2429 int reset_rc; 2430 int rc = FAILED; 2431 unsigned long cancel_rc = 0; 2432 2433 ENTER; 2434 fc_block_scsi_eh(cmd); 2435 ibmvfc_wait_while_resetting(vhost); 2436 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2437 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2438 2439 if (!cancel_rc && !reset_rc) 2440 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2441 2442 LEAVE; 2443 return rc; 2444} 2445 2446/** 2447 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2448 * @cmd: struct scsi_cmnd having problems 2449 * 2450 **/ 2451static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2452{ 2453 int rc; 2454 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2455 2456 fc_block_scsi_eh(cmd); 2457 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2458 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2459 return rc ? FAILED : SUCCESS; 2460} 2461 2462/** 2463 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2464 * @rport: rport struct 2465 * 2466 * Return value: 2467 * none 2468 **/ 2469static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2470{ 2471 struct Scsi_Host *shost = rport_to_shost(rport); 2472 struct ibmvfc_host *vhost = shost_priv(shost); 2473 struct fc_rport *dev_rport; 2474 struct scsi_device *sdev; 2475 unsigned long rc; 2476 2477 ENTER; 2478 shost_for_each_device(sdev, shost) { 2479 dev_rport = starget_to_rport(scsi_target(sdev)); 2480 if (dev_rport != rport) 2481 continue; 2482 ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2483 ibmvfc_abort_task_set(sdev); 2484 } 2485 2486 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 2487 2488 if (rc == FAILED) 2489 ibmvfc_issue_fc_host_lip(shost); 2490 LEAVE; 2491} 2492 2493static const struct ibmvfc_async_desc ae_desc [] = { 2494 { IBMVFC_AE_ELS_PLOGI, "PLOGI", IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2495 { IBMVFC_AE_ELS_LOGO, "LOGO", IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2496 { IBMVFC_AE_ELS_PRLO, "PRLO", IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2497 { IBMVFC_AE_SCN_NPORT, "N-Port SCN", IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2498 { IBMVFC_AE_SCN_GROUP, "Group SCN", IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2499 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN", IBMVFC_DEFAULT_LOG_LEVEL }, 2500 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN", IBMVFC_DEFAULT_LOG_LEVEL }, 2501 { IBMVFC_AE_LINK_UP, "Link Up", IBMVFC_DEFAULT_LOG_LEVEL }, 2502 { IBMVFC_AE_LINK_DOWN, "Link Down", IBMVFC_DEFAULT_LOG_LEVEL }, 2503 { IBMVFC_AE_LINK_DEAD, "Link Dead", IBMVFC_DEFAULT_LOG_LEVEL }, 2504 { IBMVFC_AE_HALT, "Halt", IBMVFC_DEFAULT_LOG_LEVEL }, 2505 { IBMVFC_AE_RESUME, "Resume", IBMVFC_DEFAULT_LOG_LEVEL }, 2506 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed", IBMVFC_DEFAULT_LOG_LEVEL }, 2507}; 2508 2509static const struct ibmvfc_async_desc unknown_ae = { 2510 0, "Unknown async", IBMVFC_DEFAULT_LOG_LEVEL 2511}; 2512 2513/** 2514 * ibmvfc_get_ae_desc - Get text description for async event 2515 * @ae: async event 2516 * 2517 **/ 2518static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 2519{ 2520 int i; 2521 2522 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2523 if (ae_desc[i].ae == ae) 2524 return &ae_desc[i]; 2525 2526 return &unknown_ae; 2527} 2528 2529static const struct { 2530 enum ibmvfc_ae_link_state state; 2531 const char *desc; 2532} link_desc [] = { 2533 { IBMVFC_AE_LS_LINK_UP, " link up" }, 2534 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 2535 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 2536 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 2537}; 2538 2539/** 2540 * ibmvfc_get_link_state - Get text description for link state 2541 * @state: link state 2542 * 2543 **/ 2544static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 2545{ 2546 int i; 2547 2548 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 2549 if (link_desc[i].state == state) 2550 return link_desc[i].desc; 2551 2552 return ""; 2553} 2554 2555/** 2556 * ibmvfc_handle_async - Handle an async event from the adapter 2557 * @crq: crq to process 2558 * @vhost: ibmvfc host struct 2559 * 2560 **/ 2561static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2562 struct ibmvfc_host *vhost) 2563{ 2564 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(crq->event); 2565 struct ibmvfc_target *tgt; 2566 2567 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 2568 " node_name: %llx%s\n", desc->desc, crq->scsi_id, crq->wwpn, crq->node_name, 2569 ibmvfc_get_link_state(crq->link_state)); 2570 2571 switch (crq->event) { 2572 case IBMVFC_AE_RESUME: 2573 switch (crq->link_state) { 2574 case IBMVFC_AE_LS_LINK_DOWN: 2575 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2576 break; 2577 case IBMVFC_AE_LS_LINK_DEAD: 2578 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2579 break; 2580 case IBMVFC_AE_LS_LINK_UP: 2581 case IBMVFC_AE_LS_LINK_BOUNCED: 2582 default: 2583 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2584 vhost->delay_init = 1; 2585 __ibmvfc_reset_host(vhost); 2586 break; 2587 }; 2588 2589 break; 2590 case IBMVFC_AE_LINK_UP: 2591 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2592 vhost->delay_init = 1; 2593 __ibmvfc_reset_host(vhost); 2594 break; 2595 case IBMVFC_AE_SCN_FABRIC: 2596 case IBMVFC_AE_SCN_DOMAIN: 2597 vhost->events_to_log |= IBMVFC_AE_RSCN; 2598 vhost->delay_init = 1; 2599 __ibmvfc_reset_host(vhost); 2600 break; 2601 case IBMVFC_AE_SCN_NPORT: 2602 case IBMVFC_AE_SCN_GROUP: 2603 vhost->events_to_log |= IBMVFC_AE_RSCN; 2604 ibmvfc_reinit_host(vhost); 2605 break; 2606 case IBMVFC_AE_ELS_LOGO: 2607 case IBMVFC_AE_ELS_PRLO: 2608 case IBMVFC_AE_ELS_PLOGI: 2609 list_for_each_entry(tgt, &vhost->targets, queue) { 2610 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 2611 break; 2612 if (crq->scsi_id && tgt->scsi_id != crq->scsi_id) 2613 continue; 2614 if (crq->wwpn && tgt->ids.port_name != crq->wwpn) 2615 continue; 2616 if (crq->node_name && tgt->ids.node_name != crq->node_name) 2617 continue; 2618 if (tgt->need_login && crq->event == IBMVFC_AE_ELS_LOGO) 2619 tgt->logo_rcvd = 1; 2620 if (!tgt->need_login || crq->event == IBMVFC_AE_ELS_PLOGI) { 2621 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2622 ibmvfc_reinit_host(vhost); 2623 } 2624 } 2625 break; 2626 case IBMVFC_AE_LINK_DOWN: 2627 case IBMVFC_AE_ADAPTER_FAILED: 2628 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2629 break; 2630 case IBMVFC_AE_LINK_DEAD: 2631 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2632 break; 2633 case IBMVFC_AE_HALT: 2634 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2635 break; 2636 default: 2637 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2638 break; 2639 }; 2640} 2641 2642/** 2643 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2644 * @crq: Command/Response queue 2645 * @vhost: ibmvfc host struct 2646 * 2647 **/ 2648static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2649{ 2650 long rc; 2651 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; 2652 2653 switch (crq->valid) { 2654 case IBMVFC_CRQ_INIT_RSP: 2655 switch (crq->format) { 2656 case IBMVFC_CRQ_INIT: 2657 dev_info(vhost->dev, "Partner initialized\n"); 2658 /* Send back a response */ 2659 rc = ibmvfc_send_crq_init_complete(vhost); 2660 if (rc == 0) 2661 ibmvfc_init_host(vhost); 2662 else 2663 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2664 break; 2665 case IBMVFC_CRQ_INIT_COMPLETE: 2666 dev_info(vhost->dev, "Partner initialization complete\n"); 2667 ibmvfc_init_host(vhost); 2668 break; 2669 default: 2670 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2671 } 2672 return; 2673 case IBMVFC_CRQ_XPORT_EVENT: 2674 vhost->state = IBMVFC_NO_CRQ; 2675 vhost->logged_in = 0; 2676 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2677 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2678 /* We need to re-setup the interpartition connection */ 2679 dev_info(vhost->dev, "Re-enabling adapter\n"); 2680 vhost->client_migrated = 1; 2681 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2682 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2683 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 2684 } else { 2685 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2686 ibmvfc_purge_requests(vhost, DID_ERROR); 2687 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2688 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 2689 } 2690 return; 2691 case IBMVFC_CRQ_CMD_RSP: 2692 break; 2693 default: 2694 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2695 return; 2696 } 2697 2698 if (crq->format == IBMVFC_ASYNC_EVENT) 2699 return; 2700 2701 /* The only kind of payload CRQs we should get are responses to 2702 * things we send. Make sure this response is to something we 2703 * actually sent 2704 */ 2705 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2706 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2707 crq->ioba); 2708 return; 2709 } 2710 2711 if (unlikely(atomic_read(&evt->free))) { 2712 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2713 crq->ioba); 2714 return; 2715 } 2716 2717 del_timer(&evt->timer); 2718 list_del(&evt->queue); 2719 ibmvfc_trc_end(evt); 2720 evt->done(evt); 2721} 2722 2723/** 2724 * ibmvfc_scan_finished - Check if the device scan is done. 2725 * @shost: scsi host struct 2726 * @time: current elapsed time 2727 * 2728 * Returns: 2729 * 0 if scan is not done / 1 if scan is done 2730 **/ 2731static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2732{ 2733 unsigned long flags; 2734 struct ibmvfc_host *vhost = shost_priv(shost); 2735 int done = 0; 2736 2737 spin_lock_irqsave(shost->host_lock, flags); 2738 if (time >= (init_timeout * HZ)) { 2739 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2740 "continuing initialization\n", init_timeout); 2741 done = 1; 2742 } 2743 2744 if (vhost->scan_complete) 2745 done = 1; 2746 spin_unlock_irqrestore(shost->host_lock, flags); 2747 return done; 2748} 2749 2750/** 2751 * ibmvfc_slave_alloc - Setup the device's task set value 2752 * @sdev: struct scsi_device device to configure 2753 * 2754 * Set the device's task set value so that error handling works as 2755 * expected. 2756 * 2757 * Returns: 2758 * 0 on success / -ENXIO if device does not exist 2759 **/ 2760static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2761{ 2762 struct Scsi_Host *shost = sdev->host; 2763 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2764 struct ibmvfc_host *vhost = shost_priv(shost); 2765 unsigned long flags = 0; 2766 2767 if (!rport || fc_remote_port_chkready(rport)) 2768 return -ENXIO; 2769 2770 spin_lock_irqsave(shost->host_lock, flags); 2771 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2772 spin_unlock_irqrestore(shost->host_lock, flags); 2773 return 0; 2774} 2775 2776/** 2777 * ibmvfc_target_alloc - Setup the target's task set value 2778 * @starget: struct scsi_target 2779 * 2780 * Set the target's task set value so that error handling works as 2781 * expected. 2782 * 2783 * Returns: 2784 * 0 on success / -ENXIO if device does not exist 2785 **/ 2786static int ibmvfc_target_alloc(struct scsi_target *starget) 2787{ 2788 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2789 struct ibmvfc_host *vhost = shost_priv(shost); 2790 unsigned long flags = 0; 2791 2792 spin_lock_irqsave(shost->host_lock, flags); 2793 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2794 spin_unlock_irqrestore(shost->host_lock, flags); 2795 return 0; 2796} 2797 2798/** 2799 * ibmvfc_slave_configure - Configure the device 2800 * @sdev: struct scsi_device device to configure 2801 * 2802 * Enable allow_restart for a device if it is a disk. Adjust the 2803 * queue_depth here also. 2804 * 2805 * Returns: 2806 * 0 2807 **/ 2808static int ibmvfc_slave_configure(struct scsi_device *sdev) 2809{ 2810 struct Scsi_Host *shost = sdev->host; 2811 unsigned long flags = 0; 2812 2813 spin_lock_irqsave(shost->host_lock, flags); 2814 if (sdev->type == TYPE_DISK) 2815 sdev->allow_restart = 1; 2816 2817 if (sdev->tagged_supported) { 2818 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 2819 scsi_activate_tcq(sdev, sdev->queue_depth); 2820 } else 2821 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2822 spin_unlock_irqrestore(shost->host_lock, flags); 2823 return 0; 2824} 2825 2826/** 2827 * ibmvfc_change_queue_depth - Change the device's queue depth 2828 * @sdev: scsi device struct 2829 * @qdepth: depth to set 2830 * @reason: calling context 2831 * 2832 * Return value: 2833 * actual depth set 2834 **/ 2835static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth, 2836 int reason) 2837{ 2838 if (reason != SCSI_QDEPTH_DEFAULT) 2839 return -EOPNOTSUPP; 2840 2841 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2842 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2843 2844 scsi_adjust_queue_depth(sdev, 0, qdepth); 2845 return sdev->queue_depth; 2846} 2847 2848/** 2849 * ibmvfc_change_queue_type - Change the device's queue type 2850 * @sdev: scsi device struct 2851 * @tag_type: type of tags to use 2852 * 2853 * Return value: 2854 * actual queue type set 2855 **/ 2856static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) 2857{ 2858 if (sdev->tagged_supported) { 2859 scsi_set_tag_type(sdev, tag_type); 2860 2861 if (tag_type) 2862 scsi_activate_tcq(sdev, sdev->queue_depth); 2863 else 2864 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2865 } else 2866 tag_type = 0; 2867 2868 return tag_type; 2869} 2870 2871static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2872 struct device_attribute *attr, char *buf) 2873{ 2874 struct Scsi_Host *shost = class_to_shost(dev); 2875 struct ibmvfc_host *vhost = shost_priv(shost); 2876 2877 return snprintf(buf, PAGE_SIZE, "%s\n", 2878 vhost->login_buf->resp.partition_name); 2879} 2880 2881static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2882 struct device_attribute *attr, char *buf) 2883{ 2884 struct Scsi_Host *shost = class_to_shost(dev); 2885 struct ibmvfc_host *vhost = shost_priv(shost); 2886 2887 return snprintf(buf, PAGE_SIZE, "%s\n", 2888 vhost->login_buf->resp.device_name); 2889} 2890 2891static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2892 struct device_attribute *attr, char *buf) 2893{ 2894 struct Scsi_Host *shost = class_to_shost(dev); 2895 struct ibmvfc_host *vhost = shost_priv(shost); 2896 2897 return snprintf(buf, PAGE_SIZE, "%s\n", 2898 vhost->login_buf->resp.port_loc_code); 2899} 2900 2901static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2902 struct device_attribute *attr, char *buf) 2903{ 2904 struct Scsi_Host *shost = class_to_shost(dev); 2905 struct ibmvfc_host *vhost = shost_priv(shost); 2906 2907 return snprintf(buf, PAGE_SIZE, "%s\n", 2908 vhost->login_buf->resp.drc_name); 2909} 2910 2911static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2912 struct device_attribute *attr, char *buf) 2913{ 2914 struct Scsi_Host *shost = class_to_shost(dev); 2915 struct ibmvfc_host *vhost = shost_priv(shost); 2916 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2917} 2918 2919static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 2920 struct device_attribute *attr, char *buf) 2921{ 2922 struct Scsi_Host *shost = class_to_shost(dev); 2923 struct ibmvfc_host *vhost = shost_priv(shost); 2924 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); 2925} 2926 2927/** 2928 * ibmvfc_show_log_level - Show the adapter's error logging level 2929 * @dev: class device struct 2930 * @buf: buffer 2931 * 2932 * Return value: 2933 * number of bytes printed to buffer 2934 **/ 2935static ssize_t ibmvfc_show_log_level(struct device *dev, 2936 struct device_attribute *attr, char *buf) 2937{ 2938 struct Scsi_Host *shost = class_to_shost(dev); 2939 struct ibmvfc_host *vhost = shost_priv(shost); 2940 unsigned long flags = 0; 2941 int len; 2942 2943 spin_lock_irqsave(shost->host_lock, flags); 2944 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2945 spin_unlock_irqrestore(shost->host_lock, flags); 2946 return len; 2947} 2948 2949/** 2950 * ibmvfc_store_log_level - Change the adapter's error logging level 2951 * @dev: class device struct 2952 * @buf: buffer 2953 * 2954 * Return value: 2955 * number of bytes printed to buffer 2956 **/ 2957static ssize_t ibmvfc_store_log_level(struct device *dev, 2958 struct device_attribute *attr, 2959 const char *buf, size_t count) 2960{ 2961 struct Scsi_Host *shost = class_to_shost(dev); 2962 struct ibmvfc_host *vhost = shost_priv(shost); 2963 unsigned long flags = 0; 2964 2965 spin_lock_irqsave(shost->host_lock, flags); 2966 vhost->log_level = simple_strtoul(buf, NULL, 10); 2967 spin_unlock_irqrestore(shost->host_lock, flags); 2968 return strlen(buf); 2969} 2970 2971static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 2972static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 2973static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 2974static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 2975static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 2976static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 2977static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 2978 ibmvfc_show_log_level, ibmvfc_store_log_level); 2979 2980#ifdef CONFIG_SCSI_IBMVFC_TRACE 2981/** 2982 * ibmvfc_read_trace - Dump the adapter trace 2983 * @filp: open sysfs file 2984 * @kobj: kobject struct 2985 * @bin_attr: bin_attribute struct 2986 * @buf: buffer 2987 * @off: offset 2988 * @count: buffer size 2989 * 2990 * Return value: 2991 * number of bytes printed to buffer 2992 **/ 2993static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 2994 struct bin_attribute *bin_attr, 2995 char *buf, loff_t off, size_t count) 2996{ 2997 struct device *dev = container_of(kobj, struct device, kobj); 2998 struct Scsi_Host *shost = class_to_shost(dev); 2999 struct ibmvfc_host *vhost = shost_priv(shost); 3000 unsigned long flags = 0; 3001 int size = IBMVFC_TRACE_SIZE; 3002 char *src = (char *)vhost->trace; 3003 3004 if (off > size) 3005 return 0; 3006 if (off + count > size) { 3007 size -= off; 3008 count = size; 3009 } 3010 3011 spin_lock_irqsave(shost->host_lock, flags); 3012 memcpy(buf, &src[off], count); 3013 spin_unlock_irqrestore(shost->host_lock, flags); 3014 return count; 3015} 3016 3017static struct bin_attribute ibmvfc_trace_attr = { 3018 .attr = { 3019 .name = "trace", 3020 .mode = S_IRUGO, 3021 }, 3022 .size = 0, 3023 .read = ibmvfc_read_trace, 3024}; 3025#endif 3026 3027static struct device_attribute *ibmvfc_attrs[] = { 3028 &dev_attr_partition_name, 3029 &dev_attr_device_name, 3030 &dev_attr_port_loc_code, 3031 &dev_attr_drc_name, 3032 &dev_attr_npiv_version, 3033 &dev_attr_capabilities, 3034 &dev_attr_log_level, 3035 NULL 3036}; 3037 3038static struct scsi_host_template driver_template = { 3039 .module = THIS_MODULE, 3040 .name = "IBM POWER Virtual FC Adapter", 3041 .proc_name = IBMVFC_NAME, 3042 .queuecommand = ibmvfc_queuecommand, 3043 .eh_abort_handler = ibmvfc_eh_abort_handler, 3044 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3045 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3046 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3047 .slave_alloc = ibmvfc_slave_alloc, 3048 .slave_configure = ibmvfc_slave_configure, 3049 .target_alloc = ibmvfc_target_alloc, 3050 .scan_finished = ibmvfc_scan_finished, 3051 .change_queue_depth = ibmvfc_change_queue_depth, 3052 .change_queue_type = ibmvfc_change_queue_type, 3053 .cmd_per_lun = 16, 3054 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3055 .this_id = -1, 3056 .sg_tablesize = SG_ALL, 3057 .max_sectors = IBMVFC_MAX_SECTORS, 3058 .use_clustering = ENABLE_CLUSTERING, 3059 .shost_attrs = ibmvfc_attrs, 3060}; 3061 3062/** 3063 * ibmvfc_next_async_crq - Returns the next entry in async queue 3064 * @vhost: ibmvfc host struct 3065 * 3066 * Returns: 3067 * Pointer to next entry in queue / NULL if empty 3068 **/ 3069static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3070{ 3071 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 3072 struct ibmvfc_async_crq *crq; 3073 3074 crq = &async_crq->msgs[async_crq->cur]; 3075 if (crq->valid & 0x80) { 3076 if (++async_crq->cur == async_crq->size) 3077 async_crq->cur = 0; 3078 rmb(); 3079 } else 3080 crq = NULL; 3081 3082 return crq; 3083} 3084 3085/** 3086 * ibmvfc_next_crq - Returns the next entry in message queue 3087 * @vhost: ibmvfc host struct 3088 * 3089 * Returns: 3090 * Pointer to next entry in queue / NULL if empty 3091 **/ 3092static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3093{ 3094 struct ibmvfc_crq_queue *queue = &vhost->crq; 3095 struct ibmvfc_crq *crq; 3096 3097 crq = &queue->msgs[queue->cur]; 3098 if (crq->valid & 0x80) { 3099 if (++queue->cur == queue->size) 3100 queue->cur = 0; 3101 rmb(); 3102 } else 3103 crq = NULL; 3104 3105 return crq; 3106} 3107 3108/** 3109 * ibmvfc_interrupt - Interrupt handler 3110 * @irq: number of irq to handle, not used 3111 * @dev_instance: ibmvfc_host that received interrupt 3112 * 3113 * Returns: 3114 * IRQ_HANDLED 3115 **/ 3116static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3117{ 3118 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3119 unsigned long flags; 3120 3121 spin_lock_irqsave(vhost->host->host_lock, flags); 3122 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3123 tasklet_schedule(&vhost->tasklet); 3124 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3125 return IRQ_HANDLED; 3126} 3127 3128/** 3129 * ibmvfc_tasklet - Interrupt handler tasklet 3130 * @data: ibmvfc host struct 3131 * 3132 * Returns: 3133 * Nothing 3134 **/ 3135static void ibmvfc_tasklet(void *data) 3136{ 3137 struct ibmvfc_host *vhost = data; 3138 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3139 struct ibmvfc_crq *crq; 3140 struct ibmvfc_async_crq *async; 3141 unsigned long flags; 3142 int done = 0; 3143 3144 spin_lock_irqsave(vhost->host->host_lock, flags); 3145 while (!done) { 3146 /* Pull all the valid messages off the async CRQ */ 3147 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3148 ibmvfc_handle_async(async, vhost); 3149 async->valid = 0; 3150 wmb(); 3151 } 3152 3153 /* Pull all the valid messages off the CRQ */ 3154 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3155 ibmvfc_handle_crq(crq, vhost); 3156 crq->valid = 0; 3157 wmb(); 3158 } 3159 3160 vio_enable_interrupts(vdev); 3161 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3162 vio_disable_interrupts(vdev); 3163 ibmvfc_handle_async(async, vhost); 3164 async->valid = 0; 3165 wmb(); 3166 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3167 vio_disable_interrupts(vdev); 3168 ibmvfc_handle_crq(crq, vhost); 3169 crq->valid = 0; 3170 wmb(); 3171 } else 3172 done = 1; 3173 } 3174 3175 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3176} 3177 3178/** 3179 * ibmvfc_init_tgt - Set the next init job step for the target 3180 * @tgt: ibmvfc target struct 3181 * @job_step: job step to perform 3182 * 3183 **/ 3184static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3185 void (*job_step) (struct ibmvfc_target *)) 3186{ 3187 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 3188 tgt->job_step = job_step; 3189 wake_up(&tgt->vhost->work_wait_q); 3190} 3191 3192/** 3193 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3194 * @tgt: ibmvfc target struct 3195 * @job_step: initialization job step 3196 * 3197 * Returns: 1 if step will be retried / 0 if not 3198 * 3199 **/ 3200static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3201 void (*job_step) (struct ibmvfc_target *)) 3202{ 3203 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3204 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3205 wake_up(&tgt->vhost->work_wait_q); 3206 return 0; 3207 } else 3208 ibmvfc_init_tgt(tgt, job_step); 3209 return 1; 3210} 3211 3212/* Defined in FC-LS */ 3213static const struct { 3214 int code; 3215 int retry; 3216 int logged_in; 3217} prli_rsp [] = { 3218 { 0, 1, 0 }, 3219 { 1, 0, 1 }, 3220 { 2, 1, 0 }, 3221 { 3, 1, 0 }, 3222 { 4, 0, 0 }, 3223 { 5, 0, 0 }, 3224 { 6, 0, 1 }, 3225 { 7, 0, 0 }, 3226 { 8, 1, 0 }, 3227}; 3228 3229/** 3230 * ibmvfc_get_prli_rsp - Find PRLI response index 3231 * @flags: PRLI response flags 3232 * 3233 **/ 3234static int ibmvfc_get_prli_rsp(u16 flags) 3235{ 3236 int i; 3237 int code = (flags & 0x0f00) >> 8; 3238 3239 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3240 if (prli_rsp[i].code == code) 3241 return i; 3242 3243 return 0; 3244} 3245 3246/** 3247 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3248 * @evt: ibmvfc event struct 3249 * 3250 **/ 3251static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3252{ 3253 struct ibmvfc_target *tgt = evt->tgt; 3254 struct ibmvfc_host *vhost = evt->vhost; 3255 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3256 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3257 u32 status = rsp->common.status; 3258 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3259 3260 vhost->discovery_threads--; 3261 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3262 switch (status) { 3263 case IBMVFC_MAD_SUCCESS: 3264 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3265 parms->type, parms->flags, parms->service_parms); 3266 3267 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3268 index = ibmvfc_get_prli_rsp(parms->flags); 3269 if (prli_rsp[index].logged_in) { 3270 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) { 3271 tgt->need_login = 0; 3272 tgt->ids.roles = 0; 3273 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC) 3274 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3275 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC) 3276 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3277 tgt->add_rport = 1; 3278 } else 3279 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3280 } else if (prli_rsp[index].retry) 3281 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3282 else 3283 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3284 } else 3285 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3286 break; 3287 case IBMVFC_MAD_DRIVER_FAILED: 3288 break; 3289 case IBMVFC_MAD_CRQ_ERROR: 3290 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3291 break; 3292 case IBMVFC_MAD_FAILED: 3293 default: 3294 if ((rsp->status & IBMVFC_VIOS_FAILURE) && rsp->error == IBMVFC_PLOGI_REQUIRED) 3295 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3296 else if (tgt->logo_rcvd) 3297 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3298 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3299 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3300 else 3301 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3302 3303 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3304 ibmvfc_get_cmd_error(rsp->status, rsp->error), 3305 rsp->status, rsp->error, status); 3306 break; 3307 }; 3308 3309 kref_put(&tgt->kref, ibmvfc_release_tgt); 3310 ibmvfc_free_event(evt); 3311 wake_up(&vhost->work_wait_q); 3312} 3313 3314/** 3315 * ibmvfc_tgt_send_prli - Send a process login 3316 * @tgt: ibmvfc target struct 3317 * 3318 **/ 3319static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3320{ 3321 struct ibmvfc_process_login *prli; 3322 struct ibmvfc_host *vhost = tgt->vhost; 3323 struct ibmvfc_event *evt; 3324 3325 if (vhost->discovery_threads >= disc_threads) 3326 return; 3327 3328 kref_get(&tgt->kref); 3329 evt = ibmvfc_get_event(vhost); 3330 vhost->discovery_threads++; 3331 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 3332 evt->tgt = tgt; 3333 prli = &evt->iu.prli; 3334 memset(prli, 0, sizeof(*prli)); 3335 prli->common.version = 1; 3336 prli->common.opcode = IBMVFC_PROCESS_LOGIN; 3337 prli->common.length = sizeof(*prli); 3338 prli->scsi_id = tgt->scsi_id; 3339 3340 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 3341 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; 3342 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; 3343 3344 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3345 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3346 vhost->discovery_threads--; 3347 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3348 kref_put(&tgt->kref, ibmvfc_release_tgt); 3349 } else 3350 tgt_dbg(tgt, "Sent process login\n"); 3351} 3352 3353/** 3354 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 3355 * @evt: ibmvfc event struct 3356 * 3357 **/ 3358static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 3359{ 3360 struct ibmvfc_target *tgt = evt->tgt; 3361 struct ibmvfc_host *vhost = evt->vhost; 3362 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 3363 u32 status = rsp->common.status; 3364 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3365 3366 vhost->discovery_threads--; 3367 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3368 switch (status) { 3369 case IBMVFC_MAD_SUCCESS: 3370 tgt_dbg(tgt, "Port Login succeeded\n"); 3371 if (tgt->ids.port_name && 3372 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 3373 vhost->reinit = 1; 3374 tgt_dbg(tgt, "Port re-init required\n"); 3375 break; 3376 } 3377 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3378 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3379 tgt->ids.port_id = tgt->scsi_id; 3380 memcpy(&tgt->service_parms, &rsp->service_parms, 3381 sizeof(tgt->service_parms)); 3382 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3383 sizeof(tgt->service_parms_change)); 3384 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3385 break; 3386 case IBMVFC_MAD_DRIVER_FAILED: 3387 break; 3388 case IBMVFC_MAD_CRQ_ERROR: 3389 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3390 break; 3391 case IBMVFC_MAD_FAILED: 3392 default: 3393 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3394 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3395 else 3396 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3397 3398 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3399 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3400 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3401 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); 3402 break; 3403 }; 3404 3405 kref_put(&tgt->kref, ibmvfc_release_tgt); 3406 ibmvfc_free_event(evt); 3407 wake_up(&vhost->work_wait_q); 3408} 3409 3410/** 3411 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3412 * @tgt: ibmvfc target struct 3413 * 3414 **/ 3415static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3416{ 3417 struct ibmvfc_port_login *plogi; 3418 struct ibmvfc_host *vhost = tgt->vhost; 3419 struct ibmvfc_event *evt; 3420 3421 if (vhost->discovery_threads >= disc_threads) 3422 return; 3423 3424 kref_get(&tgt->kref); 3425 tgt->logo_rcvd = 0; 3426 evt = ibmvfc_get_event(vhost); 3427 vhost->discovery_threads++; 3428 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3429 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3430 evt->tgt = tgt; 3431 plogi = &evt->iu.plogi; 3432 memset(plogi, 0, sizeof(*plogi)); 3433 plogi->common.version = 1; 3434 plogi->common.opcode = IBMVFC_PORT_LOGIN; 3435 plogi->common.length = sizeof(*plogi); 3436 plogi->scsi_id = tgt->scsi_id; 3437 3438 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3439 vhost->discovery_threads--; 3440 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3441 kref_put(&tgt->kref, ibmvfc_release_tgt); 3442 } else 3443 tgt_dbg(tgt, "Sent port login\n"); 3444} 3445 3446/** 3447 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3448 * @evt: ibmvfc event struct 3449 * 3450 **/ 3451static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3452{ 3453 struct ibmvfc_target *tgt = evt->tgt; 3454 struct ibmvfc_host *vhost = evt->vhost; 3455 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3456 u32 status = rsp->common.status; 3457 3458 vhost->discovery_threads--; 3459 ibmvfc_free_event(evt); 3460 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3461 3462 switch (status) { 3463 case IBMVFC_MAD_SUCCESS: 3464 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3465 break; 3466 case IBMVFC_MAD_DRIVER_FAILED: 3467 kref_put(&tgt->kref, ibmvfc_release_tgt); 3468 wake_up(&vhost->work_wait_q); 3469 return; 3470 case IBMVFC_MAD_FAILED: 3471 default: 3472 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3473 break; 3474 }; 3475 3476 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3477 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3478 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3479 tgt->scsi_id != tgt->new_scsi_id) 3480 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3481 kref_put(&tgt->kref, ibmvfc_release_tgt); 3482 wake_up(&vhost->work_wait_q); 3483} 3484 3485/** 3486 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3487 * @tgt: ibmvfc target struct 3488 * 3489 **/ 3490static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3491{ 3492 struct ibmvfc_implicit_logout *mad; 3493 struct ibmvfc_host *vhost = tgt->vhost; 3494 struct ibmvfc_event *evt; 3495 3496 if (vhost->discovery_threads >= disc_threads) 3497 return; 3498 3499 kref_get(&tgt->kref); 3500 evt = ibmvfc_get_event(vhost); 3501 vhost->discovery_threads++; 3502 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3503 evt->tgt = tgt; 3504 mad = &evt->iu.implicit_logout; 3505 memset(mad, 0, sizeof(*mad)); 3506 mad->common.version = 1; 3507 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; 3508 mad->common.length = sizeof(*mad); 3509 mad->old_scsi_id = tgt->scsi_id; 3510 3511 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3512 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3513 vhost->discovery_threads--; 3514 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3515 kref_put(&tgt->kref, ibmvfc_release_tgt); 3516 } else 3517 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3518} 3519 3520/** 3521 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3522 * @mad: ibmvfc passthru mad struct 3523 * @tgt: ibmvfc target struct 3524 * 3525 * Returns: 3526 * 1 if PLOGI needed / 0 if PLOGI not needed 3527 **/ 3528static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3529 struct ibmvfc_target *tgt) 3530{ 3531 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3532 sizeof(tgt->ids.port_name))) 3533 return 1; 3534 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3535 sizeof(tgt->ids.node_name))) 3536 return 1; 3537 if (mad->fc_iu.response[6] != tgt->scsi_id) 3538 return 1; 3539 return 0; 3540} 3541 3542/** 3543 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3544 * @evt: ibmvfc event struct 3545 * 3546 **/ 3547static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3548{ 3549 struct ibmvfc_target *tgt = evt->tgt; 3550 struct ibmvfc_host *vhost = evt->vhost; 3551 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3552 u32 status = mad->common.status; 3553 u8 fc_reason, fc_explain; 3554 3555 vhost->discovery_threads--; 3556 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3557 del_timer(&tgt->timer); 3558 3559 switch (status) { 3560 case IBMVFC_MAD_SUCCESS: 3561 tgt_dbg(tgt, "ADISC succeeded\n"); 3562 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3563 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3564 break; 3565 case IBMVFC_MAD_DRIVER_FAILED: 3566 break; 3567 case IBMVFC_MAD_FAILED: 3568 default: 3569 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3570 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; 3571 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; 3572 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3573 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), 3574 mad->iu.status, mad->iu.error, 3575 ibmvfc_get_fc_type(fc_reason), fc_reason, 3576 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3577 break; 3578 }; 3579 3580 kref_put(&tgt->kref, ibmvfc_release_tgt); 3581 ibmvfc_free_event(evt); 3582 wake_up(&vhost->work_wait_q); 3583} 3584 3585/** 3586 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3587 * @evt: ibmvfc event struct 3588 * 3589 **/ 3590static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3591{ 3592 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3593 3594 memset(mad, 0, sizeof(*mad)); 3595 mad->common.version = 1; 3596 mad->common.opcode = IBMVFC_PASSTHRU; 3597 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 3598 mad->cmd_ioba.va = (u64)evt->crq.ioba + 3599 offsetof(struct ibmvfc_passthru_mad, iu); 3600 mad->cmd_ioba.len = sizeof(mad->iu); 3601 mad->iu.cmd_len = sizeof(mad->fc_iu.payload); 3602 mad->iu.rsp_len = sizeof(mad->fc_iu.response); 3603 mad->iu.cmd.va = (u64)evt->crq.ioba + 3604 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3605 offsetof(struct ibmvfc_passthru_fc_iu, payload); 3606 mad->iu.cmd.len = sizeof(mad->fc_iu.payload); 3607 mad->iu.rsp.va = (u64)evt->crq.ioba + 3608 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3609 offsetof(struct ibmvfc_passthru_fc_iu, response); 3610 mad->iu.rsp.len = sizeof(mad->fc_iu.response); 3611} 3612 3613/** 3614 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3615 * @evt: ibmvfc event struct 3616 * 3617 * Just cleanup this event struct. Everything else is handled by 3618 * the ADISC completion handler. If the ADISC never actually comes 3619 * back, we still have the timer running on the ADISC event struct 3620 * which will fire and cause the CRQ to get reset. 3621 * 3622 **/ 3623static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3624{ 3625 struct ibmvfc_host *vhost = evt->vhost; 3626 struct ibmvfc_target *tgt = evt->tgt; 3627 3628 tgt_dbg(tgt, "ADISC cancel complete\n"); 3629 vhost->abort_threads--; 3630 ibmvfc_free_event(evt); 3631 kref_put(&tgt->kref, ibmvfc_release_tgt); 3632 wake_up(&vhost->work_wait_q); 3633} 3634 3635/** 3636 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3637 * @tgt: ibmvfc target struct 3638 * 3639 * If an ADISC times out, send a cancel. If the cancel times 3640 * out, reset the CRQ. When the ADISC comes back as cancelled, 3641 * log back into the target. 3642 **/ 3643static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) 3644{ 3645 struct ibmvfc_host *vhost = tgt->vhost; 3646 struct ibmvfc_event *evt; 3647 struct ibmvfc_tmf *tmf; 3648 unsigned long flags; 3649 int rc; 3650 3651 tgt_dbg(tgt, "ADISC timeout\n"); 3652 spin_lock_irqsave(vhost->host->host_lock, flags); 3653 if (vhost->abort_threads >= disc_threads || 3654 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3655 vhost->state != IBMVFC_INITIALIZING || 3656 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3657 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3658 return; 3659 } 3660 3661 vhost->abort_threads++; 3662 kref_get(&tgt->kref); 3663 evt = ibmvfc_get_event(vhost); 3664 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3665 3666 evt->tgt = tgt; 3667 tmf = &evt->iu.tmf; 3668 memset(tmf, 0, sizeof(*tmf)); 3669 tmf->common.version = 1; 3670 tmf->common.opcode = IBMVFC_TMF_MAD; 3671 tmf->common.length = sizeof(*tmf); 3672 tmf->scsi_id = tgt->scsi_id; 3673 tmf->cancel_key = tgt->cancel_key; 3674 3675 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3676 3677 if (rc) { 3678 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3679 vhost->abort_threads--; 3680 kref_put(&tgt->kref, ibmvfc_release_tgt); 3681 __ibmvfc_reset_host(vhost); 3682 } else 3683 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3684 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3685} 3686 3687/** 3688 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3689 * @tgt: ibmvfc target struct 3690 * 3691 * When sending an ADISC we end up with two timers running. The 3692 * first timer is the timer in the ibmvfc target struct. If this 3693 * fires, we send a cancel to the target. The second timer is the 3694 * timer on the ibmvfc event for the ADISC, which is longer. If that 3695 * fires, it means the ADISC timed out and our attempt to cancel it 3696 * also failed, so we need to reset the CRQ. 3697 **/ 3698static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3699{ 3700 struct ibmvfc_passthru_mad *mad; 3701 struct ibmvfc_host *vhost = tgt->vhost; 3702 struct ibmvfc_event *evt; 3703 3704 if (vhost->discovery_threads >= disc_threads) 3705 return; 3706 3707 kref_get(&tgt->kref); 3708 evt = ibmvfc_get_event(vhost); 3709 vhost->discovery_threads++; 3710 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3711 evt->tgt = tgt; 3712 3713 ibmvfc_init_passthru(evt); 3714 mad = &evt->iu.passthru; 3715 mad->iu.flags = IBMVFC_FC_ELS; 3716 mad->iu.scsi_id = tgt->scsi_id; 3717 mad->iu.cancel_key = tgt->cancel_key; 3718 3719 mad->fc_iu.payload[0] = IBMVFC_ADISC; 3720 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3721 sizeof(vhost->login_buf->resp.port_name)); 3722 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3723 sizeof(vhost->login_buf->resp.node_name)); 3724 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; 3725 3726 if (timer_pending(&tgt->timer)) 3727 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3728 else { 3729 tgt->timer.data = (unsigned long) tgt; 3730 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3731 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; 3732 add_timer(&tgt->timer); 3733 } 3734 3735 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3736 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3737 vhost->discovery_threads--; 3738 del_timer(&tgt->timer); 3739 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3740 kref_put(&tgt->kref, ibmvfc_release_tgt); 3741 } else 3742 tgt_dbg(tgt, "Sent ADISC\n"); 3743} 3744 3745/** 3746 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3747 * @evt: ibmvfc event struct 3748 * 3749 **/ 3750static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3751{ 3752 struct ibmvfc_target *tgt = evt->tgt; 3753 struct ibmvfc_host *vhost = evt->vhost; 3754 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3755 u32 status = rsp->common.status; 3756 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3757 3758 vhost->discovery_threads--; 3759 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3760 switch (status) { 3761 case IBMVFC_MAD_SUCCESS: 3762 tgt_dbg(tgt, "Query Target succeeded\n"); 3763 tgt->new_scsi_id = rsp->scsi_id; 3764 if (rsp->scsi_id != tgt->scsi_id) 3765 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3766 else 3767 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3768 break; 3769 case IBMVFC_MAD_DRIVER_FAILED: 3770 break; 3771 case IBMVFC_MAD_CRQ_ERROR: 3772 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3773 break; 3774 case IBMVFC_MAD_FAILED: 3775 default: 3776 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3777 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && 3778 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) 3779 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3780 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3781 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3782 else 3783 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3784 3785 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3786 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3787 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3788 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); 3789 break; 3790 }; 3791 3792 kref_put(&tgt->kref, ibmvfc_release_tgt); 3793 ibmvfc_free_event(evt); 3794 wake_up(&vhost->work_wait_q); 3795} 3796 3797/** 3798 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3799 * @tgt: ibmvfc target struct 3800 * 3801 **/ 3802static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3803{ 3804 struct ibmvfc_query_tgt *query_tgt; 3805 struct ibmvfc_host *vhost = tgt->vhost; 3806 struct ibmvfc_event *evt; 3807 3808 if (vhost->discovery_threads >= disc_threads) 3809 return; 3810 3811 kref_get(&tgt->kref); 3812 evt = ibmvfc_get_event(vhost); 3813 vhost->discovery_threads++; 3814 evt->tgt = tgt; 3815 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3816 query_tgt = &evt->iu.query_tgt; 3817 memset(query_tgt, 0, sizeof(*query_tgt)); 3818 query_tgt->common.version = 1; 3819 query_tgt->common.opcode = IBMVFC_QUERY_TARGET; 3820 query_tgt->common.length = sizeof(*query_tgt); 3821 query_tgt->wwpn = tgt->ids.port_name; 3822 3823 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3824 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3825 vhost->discovery_threads--; 3826 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3827 kref_put(&tgt->kref, ibmvfc_release_tgt); 3828 } else 3829 tgt_dbg(tgt, "Sent Query Target\n"); 3830} 3831 3832/** 3833 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3834 * @vhost: ibmvfc host struct 3835 * @scsi_id: SCSI ID to allocate target for 3836 * 3837 * Returns: 3838 * 0 on success / other on failure 3839 **/ 3840static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3841{ 3842 struct ibmvfc_target *tgt; 3843 unsigned long flags; 3844 3845 spin_lock_irqsave(vhost->host->host_lock, flags); 3846 list_for_each_entry(tgt, &vhost->targets, queue) { 3847 if (tgt->scsi_id == scsi_id) { 3848 if (tgt->need_login) 3849 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3850 goto unlock_out; 3851 } 3852 } 3853 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3854 3855 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3856 if (!tgt) { 3857 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", 3858 scsi_id); 3859 return -ENOMEM; 3860 } 3861 3862 memset(tgt, 0, sizeof(*tgt)); 3863 tgt->scsi_id = scsi_id; 3864 tgt->new_scsi_id = scsi_id; 3865 tgt->vhost = vhost; 3866 tgt->need_login = 1; 3867 tgt->cancel_key = vhost->task_set++; 3868 init_timer(&tgt->timer); 3869 kref_init(&tgt->kref); 3870 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3871 spin_lock_irqsave(vhost->host->host_lock, flags); 3872 list_add_tail(&tgt->queue, &vhost->targets); 3873 3874unlock_out: 3875 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3876 return 0; 3877} 3878 3879/** 3880 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3881 * @vhost: ibmvfc host struct 3882 * 3883 * Returns: 3884 * 0 on success / other on failure 3885 **/ 3886static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3887{ 3888 int i, rc; 3889 3890 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3891 rc = ibmvfc_alloc_target(vhost, 3892 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); 3893 3894 return rc; 3895} 3896 3897/** 3898 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3899 * @evt: ibmvfc event struct 3900 * 3901 **/ 3902static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3903{ 3904 struct ibmvfc_host *vhost = evt->vhost; 3905 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3906 u32 mad_status = rsp->common.status; 3907 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3908 3909 switch (mad_status) { 3910 case IBMVFC_MAD_SUCCESS: 3911 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3912 vhost->num_targets = rsp->num_written; 3913 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3914 break; 3915 case IBMVFC_MAD_FAILED: 3916 level += ibmvfc_retry_host_init(vhost); 3917 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 3918 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3919 break; 3920 case IBMVFC_MAD_DRIVER_FAILED: 3921 break; 3922 default: 3923 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3924 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3925 break; 3926 } 3927 3928 ibmvfc_free_event(evt); 3929 wake_up(&vhost->work_wait_q); 3930} 3931 3932/** 3933 * ibmvfc_discover_targets - Send Discover Targets MAD 3934 * @vhost: ibmvfc host struct 3935 * 3936 **/ 3937static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3938{ 3939 struct ibmvfc_discover_targets *mad; 3940 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3941 3942 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3943 mad = &evt->iu.discover_targets; 3944 memset(mad, 0, sizeof(*mad)); 3945 mad->common.version = 1; 3946 mad->common.opcode = IBMVFC_DISC_TARGETS; 3947 mad->common.length = sizeof(*mad); 3948 mad->bufflen = vhost->disc_buf_sz; 3949 mad->buffer.va = vhost->disc_buf_dma; 3950 mad->buffer.len = vhost->disc_buf_sz; 3951 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3952 3953 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3954 ibmvfc_dbg(vhost, "Sent discover targets\n"); 3955 else 3956 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3957} 3958 3959/** 3960 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 3961 * @evt: ibmvfc event struct 3962 * 3963 **/ 3964static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 3965{ 3966 struct ibmvfc_host *vhost = evt->vhost; 3967 u32 mad_status = evt->xfer_iu->npiv_login.common.status; 3968 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 3969 unsigned int npiv_max_sectors; 3970 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3971 3972 switch (mad_status) { 3973 case IBMVFC_MAD_SUCCESS: 3974 ibmvfc_free_event(evt); 3975 break; 3976 case IBMVFC_MAD_FAILED: 3977 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3978 level += ibmvfc_retry_host_init(vhost); 3979 else 3980 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3981 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 3982 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3983 ibmvfc_free_event(evt); 3984 return; 3985 case IBMVFC_MAD_CRQ_ERROR: 3986 ibmvfc_retry_host_init(vhost); 3987 case IBMVFC_MAD_DRIVER_FAILED: 3988 ibmvfc_free_event(evt); 3989 return; 3990 default: 3991 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 3992 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3993 ibmvfc_free_event(evt); 3994 return; 3995 } 3996 3997 vhost->client_migrated = 0; 3998 3999 if (!(rsp->flags & IBMVFC_NATIVE_FC)) { 4000 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 4001 rsp->flags); 4002 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4003 wake_up(&vhost->work_wait_q); 4004 return; 4005 } 4006 4007 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { 4008 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 4009 rsp->max_cmds); 4010 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4011 wake_up(&vhost->work_wait_q); 4012 return; 4013 } 4014 4015 vhost->logged_in = 1; 4016 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); 4017 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 4018 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 4019 rsp->drc_name, npiv_max_sectors); 4020 4021 fc_host_fabric_name(vhost->host) = rsp->node_name; 4022 fc_host_node_name(vhost->host) = rsp->node_name; 4023 fc_host_port_name(vhost->host) = rsp->port_name; 4024 fc_host_port_id(vhost->host) = rsp->scsi_id; 4025 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 4026 fc_host_supported_classes(vhost->host) = 0; 4027 if (rsp->service_parms.class1_parms[0] & 0x80000000) 4028 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 4029 if (rsp->service_parms.class2_parms[0] & 0x80000000) 4030 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 4031 if (rsp->service_parms.class3_parms[0] & 0x80000000) 4032 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 4033 fc_host_maxframe_size(vhost->host) = 4034 rsp->service_parms.common.bb_rcv_sz & 0x0fff; 4035 4036 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; 4037 vhost->host->max_sectors = npiv_max_sectors; 4038 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4039 wake_up(&vhost->work_wait_q); 4040} 4041 4042/** 4043 * ibmvfc_npiv_login - Sends NPIV login 4044 * @vhost: ibmvfc host struct 4045 * 4046 **/ 4047static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 4048{ 4049 struct ibmvfc_npiv_login_mad *mad; 4050 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4051 4052 ibmvfc_gather_partition_info(vhost); 4053 ibmvfc_set_login_info(vhost); 4054 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 4055 4056 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 4057 mad = &evt->iu.npiv_login; 4058 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 4059 mad->common.version = 1; 4060 mad->common.opcode = IBMVFC_NPIV_LOGIN; 4061 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); 4062 mad->buffer.va = vhost->login_buf_dma; 4063 mad->buffer.len = sizeof(*vhost->login_buf); 4064 4065 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4066 4067 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4068 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 4069 else 4070 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4071}; 4072 4073/** 4074 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 4075 * @vhost: ibmvfc host struct 4076 * 4077 **/ 4078static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 4079{ 4080 struct ibmvfc_host *vhost = evt->vhost; 4081 u32 mad_status = evt->xfer_iu->npiv_logout.common.status; 4082 4083 ibmvfc_free_event(evt); 4084 4085 switch (mad_status) { 4086 case IBMVFC_MAD_SUCCESS: 4087 if (list_empty(&vhost->sent) && 4088 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 4089 ibmvfc_init_host(vhost); 4090 return; 4091 } 4092 break; 4093 case IBMVFC_MAD_FAILED: 4094 case IBMVFC_MAD_NOT_SUPPORTED: 4095 case IBMVFC_MAD_CRQ_ERROR: 4096 case IBMVFC_MAD_DRIVER_FAILED: 4097 default: 4098 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 4099 break; 4100 } 4101 4102 ibmvfc_hard_reset_host(vhost); 4103} 4104 4105/** 4106 * ibmvfc_npiv_logout - Issue an NPIV Logout 4107 * @vhost: ibmvfc host struct 4108 * 4109 **/ 4110static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 4111{ 4112 struct ibmvfc_npiv_logout_mad *mad; 4113 struct ibmvfc_event *evt; 4114 4115 evt = ibmvfc_get_event(vhost); 4116 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 4117 4118 mad = &evt->iu.npiv_logout; 4119 memset(mad, 0, sizeof(*mad)); 4120 mad->common.version = 1; 4121 mad->common.opcode = IBMVFC_NPIV_LOGOUT; 4122 mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad); 4123 4124 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 4125 4126 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4127 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 4128 else 4129 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4130} 4131 4132/** 4133 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 4134 * @vhost: ibmvfc host struct 4135 * 4136 * Returns: 4137 * 1 if work to do / 0 if not 4138 **/ 4139static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 4140{ 4141 struct ibmvfc_target *tgt; 4142 4143 list_for_each_entry(tgt, &vhost->targets, queue) { 4144 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 4145 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4146 return 1; 4147 } 4148 4149 return 0; 4150} 4151 4152/** 4153 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 4154 * @vhost: ibmvfc host struct 4155 * 4156 * Returns: 4157 * 1 if work to do / 0 if not 4158 **/ 4159static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4160{ 4161 struct ibmvfc_target *tgt; 4162 4163 if (kthread_should_stop()) 4164 return 1; 4165 switch (vhost->action) { 4166 case IBMVFC_HOST_ACTION_NONE: 4167 case IBMVFC_HOST_ACTION_INIT_WAIT: 4168 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4169 return 0; 4170 case IBMVFC_HOST_ACTION_TGT_INIT: 4171 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4172 if (vhost->discovery_threads == disc_threads) 4173 return 0; 4174 list_for_each_entry(tgt, &vhost->targets, queue) 4175 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 4176 return 1; 4177 list_for_each_entry(tgt, &vhost->targets, queue) 4178 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4179 return 0; 4180 return 1; 4181 case IBMVFC_HOST_ACTION_LOGO: 4182 case IBMVFC_HOST_ACTION_INIT: 4183 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4184 case IBMVFC_HOST_ACTION_TGT_DEL: 4185 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4186 case IBMVFC_HOST_ACTION_QUERY: 4187 case IBMVFC_HOST_ACTION_RESET: 4188 case IBMVFC_HOST_ACTION_REENABLE: 4189 default: 4190 break; 4191 }; 4192 4193 return 1; 4194} 4195 4196/** 4197 * ibmvfc_work_to_do - Is there task level work to do? 4198 * @vhost: ibmvfc host struct 4199 * 4200 * Returns: 4201 * 1 if work to do / 0 if not 4202 **/ 4203static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4204{ 4205 unsigned long flags; 4206 int rc; 4207 4208 spin_lock_irqsave(vhost->host->host_lock, flags); 4209 rc = __ibmvfc_work_to_do(vhost); 4210 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4211 return rc; 4212} 4213 4214/** 4215 * ibmvfc_log_ae - Log async events if necessary 4216 * @vhost: ibmvfc host struct 4217 * @events: events to log 4218 * 4219 **/ 4220static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 4221{ 4222 if (events & IBMVFC_AE_RSCN) 4223 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 4224 if ((events & IBMVFC_AE_LINKDOWN) && 4225 vhost->state >= IBMVFC_HALTED) 4226 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 4227 if ((events & IBMVFC_AE_LINKUP) && 4228 vhost->state == IBMVFC_INITIALIZING) 4229 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 4230} 4231 4232/** 4233 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 4234 * @tgt: ibmvfc target struct 4235 * 4236 **/ 4237static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 4238{ 4239 struct ibmvfc_host *vhost = tgt->vhost; 4240 struct fc_rport *rport; 4241 unsigned long flags; 4242 4243 tgt_dbg(tgt, "Adding rport\n"); 4244 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 4245 spin_lock_irqsave(vhost->host->host_lock, flags); 4246 4247 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4248 tgt_dbg(tgt, "Deleting rport\n"); 4249 list_del(&tgt->queue); 4250 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4251 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4252 fc_remote_port_delete(rport); 4253 del_timer_sync(&tgt->timer); 4254 kref_put(&tgt->kref, ibmvfc_release_tgt); 4255 return; 4256 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 4257 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4258 return; 4259 } 4260 4261 if (rport) { 4262 tgt_dbg(tgt, "rport add succeeded\n"); 4263 tgt->rport = rport; 4264 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; 4265 rport->supported_classes = 0; 4266 tgt->target_id = rport->scsi_target_id; 4267 if (tgt->service_parms.class1_parms[0] & 0x80000000) 4268 rport->supported_classes |= FC_COS_CLASS1; 4269 if (tgt->service_parms.class2_parms[0] & 0x80000000) 4270 rport->supported_classes |= FC_COS_CLASS2; 4271 if (tgt->service_parms.class3_parms[0] & 0x80000000) 4272 rport->supported_classes |= FC_COS_CLASS3; 4273 if (rport->rqst_q) 4274 blk_queue_max_segments(rport->rqst_q, 1); 4275 } else 4276 tgt_dbg(tgt, "rport add failed\n"); 4277 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4278} 4279 4280/** 4281 * ibmvfc_do_work - Do task level work 4282 * @vhost: ibmvfc host struct 4283 * 4284 **/ 4285static void ibmvfc_do_work(struct ibmvfc_host *vhost) 4286{ 4287 struct ibmvfc_target *tgt; 4288 unsigned long flags; 4289 struct fc_rport *rport; 4290 int rc; 4291 4292 ibmvfc_log_ae(vhost, vhost->events_to_log); 4293 spin_lock_irqsave(vhost->host->host_lock, flags); 4294 vhost->events_to_log = 0; 4295 switch (vhost->action) { 4296 case IBMVFC_HOST_ACTION_NONE: 4297 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4298 case IBMVFC_HOST_ACTION_INIT_WAIT: 4299 break; 4300 case IBMVFC_HOST_ACTION_RESET: 4301 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4302 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4303 rc = ibmvfc_reset_crq(vhost); 4304 spin_lock_irqsave(vhost->host->host_lock, flags); 4305 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 4306 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 4307 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4308 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 4309 } 4310 break; 4311 case IBMVFC_HOST_ACTION_REENABLE: 4312 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4313 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4314 rc = ibmvfc_reenable_crq_queue(vhost); 4315 spin_lock_irqsave(vhost->host->host_lock, flags); 4316 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 4317 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4318 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 4319 } 4320 break; 4321 case IBMVFC_HOST_ACTION_LOGO: 4322 vhost->job_step(vhost); 4323 break; 4324 case IBMVFC_HOST_ACTION_INIT: 4325 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 4326 if (vhost->delay_init) { 4327 vhost->delay_init = 0; 4328 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4329 ssleep(15); 4330 return; 4331 } else 4332 vhost->job_step(vhost); 4333 break; 4334 case IBMVFC_HOST_ACTION_QUERY: 4335 list_for_each_entry(tgt, &vhost->targets, queue) 4336 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 4337 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 4338 break; 4339 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4340 list_for_each_entry(tgt, &vhost->targets, queue) { 4341 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4342 tgt->job_step(tgt); 4343 break; 4344 } 4345 } 4346 4347 if (!ibmvfc_dev_init_to_do(vhost)) 4348 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 4349 break; 4350 case IBMVFC_HOST_ACTION_TGT_DEL: 4351 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4352 list_for_each_entry(tgt, &vhost->targets, queue) { 4353 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4354 tgt_dbg(tgt, "Deleting rport\n"); 4355 rport = tgt->rport; 4356 tgt->rport = NULL; 4357 list_del(&tgt->queue); 4358 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4359 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4360 if (rport) 4361 fc_remote_port_delete(rport); 4362 del_timer_sync(&tgt->timer); 4363 kref_put(&tgt->kref, ibmvfc_release_tgt); 4364 return; 4365 } 4366 } 4367 4368 if (vhost->state == IBMVFC_INITIALIZING) { 4369 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 4370 if (vhost->reinit) { 4371 vhost->reinit = 0; 4372 scsi_block_requests(vhost->host); 4373 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4374 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4375 } else { 4376 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 4377 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4378 wake_up(&vhost->init_wait_q); 4379 schedule_work(&vhost->rport_add_work_q); 4380 vhost->init_retries = 0; 4381 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4382 scsi_unblock_requests(vhost->host); 4383 } 4384 4385 return; 4386 } else { 4387 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 4388 vhost->job_step = ibmvfc_discover_targets; 4389 } 4390 } else { 4391 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4392 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4393 scsi_unblock_requests(vhost->host); 4394 wake_up(&vhost->init_wait_q); 4395 return; 4396 } 4397 break; 4398 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4399 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4400 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4401 ibmvfc_alloc_targets(vhost); 4402 spin_lock_irqsave(vhost->host->host_lock, flags); 4403 break; 4404 case IBMVFC_HOST_ACTION_TGT_INIT: 4405 list_for_each_entry(tgt, &vhost->targets, queue) { 4406 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4407 tgt->job_step(tgt); 4408 break; 4409 } 4410 } 4411 4412 if (!ibmvfc_dev_init_to_do(vhost)) 4413 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4414 break; 4415 default: 4416 break; 4417 }; 4418 4419 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4420} 4421 4422/** 4423 * ibmvfc_work - Do task level work 4424 * @data: ibmvfc host struct 4425 * 4426 * Returns: 4427 * zero 4428 **/ 4429static int ibmvfc_work(void *data) 4430{ 4431 struct ibmvfc_host *vhost = data; 4432 int rc; 4433 4434 set_user_nice(current, -20); 4435 4436 while (1) { 4437 rc = wait_event_interruptible(vhost->work_wait_q, 4438 ibmvfc_work_to_do(vhost)); 4439 4440 BUG_ON(rc); 4441 4442 if (kthread_should_stop()) 4443 break; 4444 4445 ibmvfc_do_work(vhost); 4446 } 4447 4448 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4449 return 0; 4450} 4451 4452/** 4453 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4454 * @vhost: ibmvfc host struct 4455 * 4456 * Allocates a page for messages, maps it for dma, and registers 4457 * the crq with the hypervisor. 4458 * 4459 * Return value: 4460 * zero on success / other on failure 4461 **/ 4462static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4463{ 4464 int rc, retrc = -ENOMEM; 4465 struct device *dev = vhost->dev; 4466 struct vio_dev *vdev = to_vio_dev(dev); 4467 struct ibmvfc_crq_queue *crq = &vhost->crq; 4468 4469 ENTER; 4470 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4471 4472 if (!crq->msgs) 4473 return -ENOMEM; 4474 4475 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4476 crq->msg_token = dma_map_single(dev, crq->msgs, 4477 PAGE_SIZE, DMA_BIDIRECTIONAL); 4478 4479 if (dma_mapping_error(dev, crq->msg_token)) 4480 goto map_failed; 4481 4482 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4483 crq->msg_token, PAGE_SIZE); 4484 4485 if (rc == H_RESOURCE) 4486 /* maybe kexecing and resource is busy. try a reset */ 4487 retrc = rc = ibmvfc_reset_crq(vhost); 4488 4489 if (rc == H_CLOSED) 4490 dev_warn(dev, "Partner adapter not ready\n"); 4491 else if (rc) { 4492 dev_warn(dev, "Error %d opening adapter\n", rc); 4493 goto reg_crq_failed; 4494 } 4495 4496 retrc = 0; 4497 4498 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4499 4500 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4501 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4502 goto req_irq_failed; 4503 } 4504 4505 if ((rc = vio_enable_interrupts(vdev))) { 4506 dev_err(dev, "Error %d enabling interrupts\n", rc); 4507 goto req_irq_failed; 4508 } 4509 4510 crq->cur = 0; 4511 LEAVE; 4512 return retrc; 4513 4514req_irq_failed: 4515 tasklet_kill(&vhost->tasklet); 4516 do { 4517 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4518 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4519reg_crq_failed: 4520 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4521map_failed: 4522 free_page((unsigned long)crq->msgs); 4523 return retrc; 4524} 4525 4526/** 4527 * ibmvfc_free_mem - Free memory for vhost 4528 * @vhost: ibmvfc host struct 4529 * 4530 * Return value: 4531 * none 4532 **/ 4533static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4534{ 4535 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4536 4537 ENTER; 4538 mempool_destroy(vhost->tgt_pool); 4539 kfree(vhost->trace); 4540 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4541 vhost->disc_buf_dma); 4542 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4543 vhost->login_buf, vhost->login_buf_dma); 4544 dma_pool_destroy(vhost->sg_pool); 4545 dma_unmap_single(vhost->dev, async_q->msg_token, 4546 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4547 free_page((unsigned long)async_q->msgs); 4548 LEAVE; 4549} 4550 4551/** 4552 * ibmvfc_alloc_mem - Allocate memory for vhost 4553 * @vhost: ibmvfc host struct 4554 * 4555 * Return value: 4556 * 0 on success / non-zero on failure 4557 **/ 4558static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4559{ 4560 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4561 struct device *dev = vhost->dev; 4562 4563 ENTER; 4564 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4565 if (!async_q->msgs) { 4566 dev_err(dev, "Couldn't allocate async queue.\n"); 4567 goto nomem; 4568 } 4569 4570 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4571 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4572 async_q->size * sizeof(*async_q->msgs), 4573 DMA_BIDIRECTIONAL); 4574 4575 if (dma_mapping_error(dev, async_q->msg_token)) { 4576 dev_err(dev, "Failed to map async queue\n"); 4577 goto free_async_crq; 4578 } 4579 4580 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4581 SG_ALL * sizeof(struct srp_direct_buf), 4582 sizeof(struct srp_direct_buf), 0); 4583 4584 if (!vhost->sg_pool) { 4585 dev_err(dev, "Failed to allocate sg pool\n"); 4586 goto unmap_async_crq; 4587 } 4588 4589 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4590 &vhost->login_buf_dma, GFP_KERNEL); 4591 4592 if (!vhost->login_buf) { 4593 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4594 goto free_sg_pool; 4595 } 4596 4597 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4598 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4599 &vhost->disc_buf_dma, GFP_KERNEL); 4600 4601 if (!vhost->disc_buf) { 4602 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4603 goto free_login_buffer; 4604 } 4605 4606 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4607 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4608 4609 if (!vhost->trace) 4610 goto free_disc_buffer; 4611 4612 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4613 sizeof(struct ibmvfc_target)); 4614 4615 if (!vhost->tgt_pool) { 4616 dev_err(dev, "Couldn't allocate target memory pool\n"); 4617 goto free_trace; 4618 } 4619 4620 LEAVE; 4621 return 0; 4622 4623free_trace: 4624 kfree(vhost->trace); 4625free_disc_buffer: 4626 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4627 vhost->disc_buf_dma); 4628free_login_buffer: 4629 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4630 vhost->login_buf, vhost->login_buf_dma); 4631free_sg_pool: 4632 dma_pool_destroy(vhost->sg_pool); 4633unmap_async_crq: 4634 dma_unmap_single(dev, async_q->msg_token, 4635 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4636free_async_crq: 4637 free_page((unsigned long)async_q->msgs); 4638nomem: 4639 LEAVE; 4640 return -ENOMEM; 4641} 4642 4643/** 4644 * ibmvfc_rport_add_thread - Worker thread for rport adds 4645 * @work: work struct 4646 * 4647 **/ 4648static void ibmvfc_rport_add_thread(struct work_struct *work) 4649{ 4650 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4651 rport_add_work_q); 4652 struct ibmvfc_target *tgt; 4653 struct fc_rport *rport; 4654 unsigned long flags; 4655 int did_work; 4656 4657 ENTER; 4658 spin_lock_irqsave(vhost->host->host_lock, flags); 4659 do { 4660 did_work = 0; 4661 if (vhost->state != IBMVFC_ACTIVE) 4662 break; 4663 4664 list_for_each_entry(tgt, &vhost->targets, queue) { 4665 if (tgt->add_rport) { 4666 did_work = 1; 4667 tgt->add_rport = 0; 4668 kref_get(&tgt->kref); 4669 rport = tgt->rport; 4670 if (!rport) { 4671 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4672 ibmvfc_tgt_add_rport(tgt); 4673 } else if (get_device(&rport->dev)) { 4674 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4675 tgt_dbg(tgt, "Setting rport roles\n"); 4676 fc_remote_port_rolechg(rport, tgt->ids.roles); 4677 put_device(&rport->dev); 4678 } 4679 4680 kref_put(&tgt->kref, ibmvfc_release_tgt); 4681 spin_lock_irqsave(vhost->host->host_lock, flags); 4682 break; 4683 } 4684 } 4685 } while(did_work); 4686 4687 if (vhost->state == IBMVFC_ACTIVE) 4688 vhost->scan_complete = 1; 4689 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4690 LEAVE; 4691} 4692 4693/** 4694 * ibmvfc_probe - Adapter hot plug add entry point 4695 * @vdev: vio device struct 4696 * @id: vio device id struct 4697 * 4698 * Return value: 4699 * 0 on success / non-zero on failure 4700 **/ 4701static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4702{ 4703 struct ibmvfc_host *vhost; 4704 struct Scsi_Host *shost; 4705 struct device *dev = &vdev->dev; 4706 int rc = -ENOMEM; 4707 4708 ENTER; 4709 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4710 if (!shost) { 4711 dev_err(dev, "Couldn't allocate host data\n"); 4712 goto out; 4713 } 4714 4715 shost->transportt = ibmvfc_transport_template; 4716 shost->can_queue = max_requests; 4717 shost->max_lun = max_lun; 4718 shost->max_id = max_targets; 4719 shost->max_sectors = IBMVFC_MAX_SECTORS; 4720 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4721 shost->unique_id = shost->host_no; 4722 4723 vhost = shost_priv(shost); 4724 INIT_LIST_HEAD(&vhost->sent); 4725 INIT_LIST_HEAD(&vhost->free); 4726 INIT_LIST_HEAD(&vhost->targets); 4727 sprintf(vhost->name, IBMVFC_NAME); 4728 vhost->host = shost; 4729 vhost->dev = dev; 4730 vhost->partition_number = -1; 4731 vhost->log_level = log_level; 4732 vhost->task_set = 1; 4733 strcpy(vhost->partition_name, "UNKNOWN"); 4734 init_waitqueue_head(&vhost->work_wait_q); 4735 init_waitqueue_head(&vhost->init_wait_q); 4736 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4737 mutex_init(&vhost->passthru_mutex); 4738 4739 if ((rc = ibmvfc_alloc_mem(vhost))) 4740 goto free_scsi_host; 4741 4742 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4743 shost->host_no); 4744 4745 if (IS_ERR(vhost->work_thread)) { 4746 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4747 PTR_ERR(vhost->work_thread)); 4748 goto free_host_mem; 4749 } 4750 4751 if ((rc = ibmvfc_init_crq(vhost))) { 4752 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4753 goto kill_kthread; 4754 } 4755 4756 if ((rc = ibmvfc_init_event_pool(vhost))) { 4757 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4758 goto release_crq; 4759 } 4760 4761 if ((rc = scsi_add_host(shost, dev))) 4762 goto release_event_pool; 4763 4764 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 4765 4766 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4767 &ibmvfc_trace_attr))) { 4768 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4769 goto remove_shost; 4770 } 4771 4772 if (shost_to_fc_host(shost)->rqst_q) 4773 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 4774 dev_set_drvdata(dev, vhost); 4775 spin_lock(&ibmvfc_driver_lock); 4776 list_add_tail(&vhost->queue, &ibmvfc_head); 4777 spin_unlock(&ibmvfc_driver_lock); 4778 4779 ibmvfc_send_crq_init(vhost); 4780 scsi_scan_host(shost); 4781 return 0; 4782 4783remove_shost: 4784 scsi_remove_host(shost); 4785release_event_pool: 4786 ibmvfc_free_event_pool(vhost); 4787release_crq: 4788 ibmvfc_release_crq_queue(vhost); 4789kill_kthread: 4790 kthread_stop(vhost->work_thread); 4791free_host_mem: 4792 ibmvfc_free_mem(vhost); 4793free_scsi_host: 4794 scsi_host_put(shost); 4795out: 4796 LEAVE; 4797 return rc; 4798} 4799 4800/** 4801 * ibmvfc_remove - Adapter hot plug remove entry point 4802 * @vdev: vio device struct 4803 * 4804 * Return value: 4805 * 0 4806 **/ 4807static int ibmvfc_remove(struct vio_dev *vdev) 4808{ 4809 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4810 unsigned long flags; 4811 4812 ENTER; 4813 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4814 4815 spin_lock_irqsave(vhost->host->host_lock, flags); 4816 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4817 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4818 4819 ibmvfc_wait_while_resetting(vhost); 4820 ibmvfc_release_crq_queue(vhost); 4821 kthread_stop(vhost->work_thread); 4822 fc_remove_host(vhost->host); 4823 scsi_remove_host(vhost->host); 4824 4825 spin_lock_irqsave(vhost->host->host_lock, flags); 4826 ibmvfc_purge_requests(vhost, DID_ERROR); 4827 ibmvfc_free_event_pool(vhost); 4828 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4829 4830 ibmvfc_free_mem(vhost); 4831 spin_lock(&ibmvfc_driver_lock); 4832 list_del(&vhost->queue); 4833 spin_unlock(&ibmvfc_driver_lock); 4834 scsi_host_put(vhost->host); 4835 LEAVE; 4836 return 0; 4837} 4838 4839/** 4840 * ibmvfc_resume - Resume from suspend 4841 * @dev: device struct 4842 * 4843 * We may have lost an interrupt across suspend/resume, so kick the 4844 * interrupt handler 4845 * 4846 */ 4847static int ibmvfc_resume(struct device *dev) 4848{ 4849 unsigned long flags; 4850 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 4851 struct vio_dev *vdev = to_vio_dev(dev); 4852 4853 spin_lock_irqsave(vhost->host->host_lock, flags); 4854 vio_disable_interrupts(vdev); 4855 tasklet_schedule(&vhost->tasklet); 4856 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4857 return 0; 4858} 4859 4860/** 4861 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4862 * @vdev: vio device struct 4863 * 4864 * Return value: 4865 * Number of bytes the driver will need to DMA map at the same time in 4866 * order to perform well. 4867 */ 4868static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4869{ 4870 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4871 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4872} 4873 4874static struct vio_device_id ibmvfc_device_table[] __devinitdata = { 4875 {"fcp", "IBM,vfc-client"}, 4876 { "", "" } 4877}; 4878MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4879 4880static struct dev_pm_ops ibmvfc_pm_ops = { 4881 .resume = ibmvfc_resume 4882}; 4883 4884static struct vio_driver ibmvfc_driver = { 4885 .id_table = ibmvfc_device_table, 4886 .probe = ibmvfc_probe, 4887 .remove = ibmvfc_remove, 4888 .get_desired_dma = ibmvfc_get_desired_dma, 4889 .driver = { 4890 .name = IBMVFC_NAME, 4891 .owner = THIS_MODULE, 4892 .pm = &ibmvfc_pm_ops, 4893 } 4894}; 4895 4896static struct fc_function_template ibmvfc_transport_functions = { 4897 .show_host_fabric_name = 1, 4898 .show_host_node_name = 1, 4899 .show_host_port_name = 1, 4900 .show_host_supported_classes = 1, 4901 .show_host_port_type = 1, 4902 .show_host_port_id = 1, 4903 .show_host_maxframe_size = 1, 4904 4905 .get_host_port_state = ibmvfc_get_host_port_state, 4906 .show_host_port_state = 1, 4907 4908 .get_host_speed = ibmvfc_get_host_speed, 4909 .show_host_speed = 1, 4910 4911 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4912 .terminate_rport_io = ibmvfc_terminate_rport_io, 4913 4914 .show_rport_maxframe_size = 1, 4915 .show_rport_supported_classes = 1, 4916 4917 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4918 .show_rport_dev_loss_tmo = 1, 4919 4920 .get_starget_node_name = ibmvfc_get_starget_node_name, 4921 .show_starget_node_name = 1, 4922 4923 .get_starget_port_name = ibmvfc_get_starget_port_name, 4924 .show_starget_port_name = 1, 4925 4926 .get_starget_port_id = ibmvfc_get_starget_port_id, 4927 .show_starget_port_id = 1, 4928 4929 .bsg_request = ibmvfc_bsg_request, 4930 .bsg_timeout = ibmvfc_bsg_timeout, 4931}; 4932 4933/** 4934 * ibmvfc_module_init - Initialize the ibmvfc module 4935 * 4936 * Return value: 4937 * 0 on success / other on failure 4938 **/ 4939static int __init ibmvfc_module_init(void) 4940{ 4941 int rc; 4942 4943 if (!firmware_has_feature(FW_FEATURE_VIO)) 4944 return -ENODEV; 4945 4946 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4947 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4948 4949 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4950 if (!ibmvfc_transport_template) 4951 return -ENOMEM; 4952 4953 rc = vio_register_driver(&ibmvfc_driver); 4954 if (rc) 4955 fc_release_transport(ibmvfc_transport_template); 4956 return rc; 4957} 4958 4959/** 4960 * ibmvfc_module_exit - Teardown the ibmvfc module 4961 * 4962 * Return value: 4963 * nothing 4964 **/ 4965static void __exit ibmvfc_module_exit(void) 4966{ 4967 vio_unregister_driver(&ibmvfc_driver); 4968 fc_release_transport(ibmvfc_transport_template); 4969} 4970 4971module_init(ibmvfc_module_init); 4972module_exit(ibmvfc_module_exit); 4973