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_lck(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 1675static DEF_SCSI_QCMD(ibmvfc_queuecommand) 1676 1677/** 1678 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1679 * @evt: ibmvfc event struct 1680 * 1681 **/ 1682static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1683{ 1684 /* copy the response back */ 1685 if (evt->sync_iu) 1686 *evt->sync_iu = *evt->xfer_iu; 1687 1688 complete(&evt->comp); 1689} 1690 1691/** 1692 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 1693 * @evt: struct ibmvfc_event 1694 * 1695 **/ 1696static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 1697{ 1698 struct ibmvfc_host *vhost = evt->vhost; 1699 1700 ibmvfc_free_event(evt); 1701 vhost->aborting_passthru = 0; 1702 dev_info(vhost->dev, "Passthru command cancelled\n"); 1703} 1704 1705/** 1706 * ibmvfc_bsg_timeout - Handle a BSG timeout 1707 * @job: struct fc_bsg_job that timed out 1708 * 1709 * Returns: 1710 * 0 on success / other on failure 1711 **/ 1712static int ibmvfc_bsg_timeout(struct fc_bsg_job *job) 1713{ 1714 struct ibmvfc_host *vhost = shost_priv(job->shost); 1715 unsigned long port_id = (unsigned long)job->dd_data; 1716 struct ibmvfc_event *evt; 1717 struct ibmvfc_tmf *tmf; 1718 unsigned long flags; 1719 int rc; 1720 1721 ENTER; 1722 spin_lock_irqsave(vhost->host->host_lock, flags); 1723 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 1724 __ibmvfc_reset_host(vhost); 1725 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1726 return 0; 1727 } 1728 1729 vhost->aborting_passthru = 1; 1730 evt = ibmvfc_get_event(vhost); 1731 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 1732 1733 tmf = &evt->iu.tmf; 1734 memset(tmf, 0, sizeof(*tmf)); 1735 tmf->common.version = 1; 1736 tmf->common.opcode = IBMVFC_TMF_MAD; 1737 tmf->common.length = sizeof(*tmf); 1738 tmf->scsi_id = port_id; 1739 tmf->cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY; 1740 tmf->my_cancel_key = IBMVFC_INTERNAL_CANCEL_KEY; 1741 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1742 1743 if (rc != 0) { 1744 vhost->aborting_passthru = 0; 1745 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 1746 rc = -EIO; 1747 } else 1748 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 1749 port_id); 1750 1751 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1752 1753 LEAVE; 1754 return rc; 1755} 1756 1757/** 1758 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 1759 * @vhost: struct ibmvfc_host to send command 1760 * @port_id: port ID to send command 1761 * 1762 * Returns: 1763 * 0 on success / other on failure 1764 **/ 1765static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 1766{ 1767 struct ibmvfc_port_login *plogi; 1768 struct ibmvfc_target *tgt; 1769 struct ibmvfc_event *evt; 1770 union ibmvfc_iu rsp_iu; 1771 unsigned long flags; 1772 int rc = 0, issue_login = 1; 1773 1774 ENTER; 1775 spin_lock_irqsave(vhost->host->host_lock, flags); 1776 list_for_each_entry(tgt, &vhost->targets, queue) { 1777 if (tgt->scsi_id == port_id) { 1778 issue_login = 0; 1779 break; 1780 } 1781 } 1782 1783 if (!issue_login) 1784 goto unlock_out; 1785 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 1786 goto unlock_out; 1787 1788 evt = ibmvfc_get_event(vhost); 1789 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1790 plogi = &evt->iu.plogi; 1791 memset(plogi, 0, sizeof(*plogi)); 1792 plogi->common.version = 1; 1793 plogi->common.opcode = IBMVFC_PORT_LOGIN; 1794 plogi->common.length = sizeof(*plogi); 1795 plogi->scsi_id = port_id; 1796 evt->sync_iu = &rsp_iu; 1797 init_completion(&evt->comp); 1798 1799 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1800 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1801 1802 if (rc) 1803 return -EIO; 1804 1805 wait_for_completion(&evt->comp); 1806 1807 if (rsp_iu.plogi.common.status) 1808 rc = -EIO; 1809 1810 spin_lock_irqsave(vhost->host->host_lock, flags); 1811 ibmvfc_free_event(evt); 1812unlock_out: 1813 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1814 LEAVE; 1815 return rc; 1816} 1817 1818/** 1819 * ibmvfc_bsg_request - Handle a BSG request 1820 * @job: struct fc_bsg_job to be executed 1821 * 1822 * Returns: 1823 * 0 on success / other on failure 1824 **/ 1825static int ibmvfc_bsg_request(struct fc_bsg_job *job) 1826{ 1827 struct ibmvfc_host *vhost = shost_priv(job->shost); 1828 struct fc_rport *rport = job->rport; 1829 struct ibmvfc_passthru_mad *mad; 1830 struct ibmvfc_event *evt; 1831 union ibmvfc_iu rsp_iu; 1832 unsigned long flags, port_id = -1; 1833 unsigned int code = job->request->msgcode; 1834 int rc = 0, req_seg, rsp_seg, issue_login = 0; 1835 u32 fc_flags, rsp_len; 1836 1837 ENTER; 1838 job->reply->reply_payload_rcv_len = 0; 1839 if (rport) 1840 port_id = rport->port_id; 1841 1842 switch (code) { 1843 case FC_BSG_HST_ELS_NOLOGIN: 1844 port_id = (job->request->rqst_data.h_els.port_id[0] << 16) | 1845 (job->request->rqst_data.h_els.port_id[1] << 8) | 1846 job->request->rqst_data.h_els.port_id[2]; 1847 case FC_BSG_RPT_ELS: 1848 fc_flags = IBMVFC_FC_ELS; 1849 break; 1850 case FC_BSG_HST_CT: 1851 issue_login = 1; 1852 port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) | 1853 (job->request->rqst_data.h_ct.port_id[1] << 8) | 1854 job->request->rqst_data.h_ct.port_id[2]; 1855 case FC_BSG_RPT_CT: 1856 fc_flags = IBMVFC_FC_CT_IU; 1857 break; 1858 default: 1859 return -ENOTSUPP; 1860 }; 1861 1862 if (port_id == -1) 1863 return -EINVAL; 1864 if (!mutex_trylock(&vhost->passthru_mutex)) 1865 return -EBUSY; 1866 1867 job->dd_data = (void *)port_id; 1868 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 1869 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1870 1871 if (!req_seg) { 1872 mutex_unlock(&vhost->passthru_mutex); 1873 return -ENOMEM; 1874 } 1875 1876 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 1877 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1878 1879 if (!rsp_seg) { 1880 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1881 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1882 mutex_unlock(&vhost->passthru_mutex); 1883 return -ENOMEM; 1884 } 1885 1886 if (req_seg > 1 || rsp_seg > 1) { 1887 rc = -EINVAL; 1888 goto out; 1889 } 1890 1891 if (issue_login) 1892 rc = ibmvfc_bsg_plogi(vhost, port_id); 1893 1894 spin_lock_irqsave(vhost->host->host_lock, flags); 1895 1896 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 1897 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1898 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1899 goto out; 1900 } 1901 1902 evt = ibmvfc_get_event(vhost); 1903 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1904 mad = &evt->iu.passthru; 1905 1906 memset(mad, 0, sizeof(*mad)); 1907 mad->common.version = 1; 1908 mad->common.opcode = IBMVFC_PASSTHRU; 1909 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 1910 1911 mad->cmd_ioba.va = (u64)evt->crq.ioba + 1912 offsetof(struct ibmvfc_passthru_mad, iu); 1913 mad->cmd_ioba.len = sizeof(mad->iu); 1914 1915 mad->iu.cmd_len = job->request_payload.payload_len; 1916 mad->iu.rsp_len = job->reply_payload.payload_len; 1917 mad->iu.flags = fc_flags; 1918 mad->iu.cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY; 1919 1920 mad->iu.cmd.va = sg_dma_address(job->request_payload.sg_list); 1921 mad->iu.cmd.len = sg_dma_len(job->request_payload.sg_list); 1922 mad->iu.rsp.va = sg_dma_address(job->reply_payload.sg_list); 1923 mad->iu.rsp.len = sg_dma_len(job->reply_payload.sg_list); 1924 mad->iu.scsi_id = port_id; 1925 mad->iu.tag = (u64)evt; 1926 rsp_len = mad->iu.rsp.len; 1927 1928 evt->sync_iu = &rsp_iu; 1929 init_completion(&evt->comp); 1930 rc = ibmvfc_send_event(evt, vhost, 0); 1931 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1932 1933 if (rc) { 1934 rc = -EIO; 1935 goto out; 1936 } 1937 1938 wait_for_completion(&evt->comp); 1939 1940 if (rsp_iu.passthru.common.status) 1941 rc = -EIO; 1942 else 1943 job->reply->reply_payload_rcv_len = rsp_len; 1944 1945 spin_lock_irqsave(vhost->host->host_lock, flags); 1946 ibmvfc_free_event(evt); 1947 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1948 job->reply->result = rc; 1949 job->job_done(job); 1950 rc = 0; 1951out: 1952 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1953 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1954 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 1955 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1956 mutex_unlock(&vhost->passthru_mutex); 1957 LEAVE; 1958 return rc; 1959} 1960 1961/** 1962 * ibmvfc_reset_device - Reset the device with the specified reset type 1963 * @sdev: scsi device to reset 1964 * @type: reset type 1965 * @desc: reset type description for log messages 1966 * 1967 * Returns: 1968 * 0 on success / other on failure 1969 **/ 1970static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1971{ 1972 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1973 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1974 struct ibmvfc_cmd *tmf; 1975 struct ibmvfc_event *evt = NULL; 1976 union ibmvfc_iu rsp_iu; 1977 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1978 int rsp_rc = -EBUSY; 1979 unsigned long flags; 1980 int rsp_code = 0; 1981 1982 spin_lock_irqsave(vhost->host->host_lock, flags); 1983 if (vhost->state == IBMVFC_ACTIVE) { 1984 evt = ibmvfc_get_event(vhost); 1985 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1986 1987 tmf = &evt->iu.cmd; 1988 memset(tmf, 0, sizeof(*tmf)); 1989 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1990 tmf->resp.len = sizeof(tmf->rsp); 1991 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1992 tmf->payload_len = sizeof(tmf->iu); 1993 tmf->resp_len = sizeof(tmf->rsp); 1994 tmf->cancel_key = (unsigned long)sdev->hostdata; 1995 tmf->tgt_scsi_id = rport->port_id; 1996 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1997 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1998 tmf->iu.tmf_flags = type; 1999 evt->sync_iu = &rsp_iu; 2000 2001 init_completion(&evt->comp); 2002 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2003 } 2004 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2005 2006 if (rsp_rc != 0) { 2007 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 2008 desc, rsp_rc); 2009 return -EIO; 2010 } 2011 2012 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2013 wait_for_completion(&evt->comp); 2014 2015 if (rsp_iu.cmd.status) 2016 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2017 2018 if (rsp_code) { 2019 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2020 rsp_code = fc_rsp->data.info.rsp_code; 2021 2022 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2023 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2024 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 2025 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2026 fc_rsp->scsi_status); 2027 rsp_rc = -EIO; 2028 } else 2029 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2030 2031 spin_lock_irqsave(vhost->host->host_lock, flags); 2032 ibmvfc_free_event(evt); 2033 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2034 return rsp_rc; 2035} 2036 2037/** 2038 * ibmvfc_match_rport - Match function for specified remote port 2039 * @evt: ibmvfc event struct 2040 * @device: device to match (rport) 2041 * 2042 * Returns: 2043 * 1 if event matches rport / 0 if event does not match rport 2044 **/ 2045static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2046{ 2047 struct fc_rport *cmd_rport; 2048 2049 if (evt->cmnd) { 2050 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2051 if (cmd_rport == rport) 2052 return 1; 2053 } 2054 return 0; 2055} 2056 2057/** 2058 * ibmvfc_match_target - Match function for specified target 2059 * @evt: ibmvfc event struct 2060 * @device: device to match (starget) 2061 * 2062 * Returns: 2063 * 1 if event matches starget / 0 if event does not match starget 2064 **/ 2065static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2066{ 2067 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2068 return 1; 2069 return 0; 2070} 2071 2072/** 2073 * ibmvfc_match_lun - Match function for specified LUN 2074 * @evt: ibmvfc event struct 2075 * @device: device to match (sdev) 2076 * 2077 * Returns: 2078 * 1 if event matches sdev / 0 if event does not match sdev 2079 **/ 2080static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2081{ 2082 if (evt->cmnd && evt->cmnd->device == device) 2083 return 1; 2084 return 0; 2085} 2086 2087/** 2088 * ibmvfc_wait_for_ops - Wait for ops to complete 2089 * @vhost: ibmvfc host struct 2090 * @device: device to match (starget or sdev) 2091 * @match: match function 2092 * 2093 * Returns: 2094 * SUCCESS / FAILED 2095 **/ 2096static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2097 int (*match) (struct ibmvfc_event *, void *)) 2098{ 2099 struct ibmvfc_event *evt; 2100 DECLARE_COMPLETION_ONSTACK(comp); 2101 int wait; 2102 unsigned long flags; 2103 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2104 2105 ENTER; 2106 do { 2107 wait = 0; 2108 spin_lock_irqsave(vhost->host->host_lock, flags); 2109 list_for_each_entry(evt, &vhost->sent, queue) { 2110 if (match(evt, device)) { 2111 evt->eh_comp = ∁ 2112 wait++; 2113 } 2114 } 2115 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2116 2117 if (wait) { 2118 timeout = wait_for_completion_timeout(&comp, timeout); 2119 2120 if (!timeout) { 2121 wait = 0; 2122 spin_lock_irqsave(vhost->host->host_lock, flags); 2123 list_for_each_entry(evt, &vhost->sent, queue) { 2124 if (match(evt, device)) { 2125 evt->eh_comp = NULL; 2126 wait++; 2127 } 2128 } 2129 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2130 if (wait) 2131 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2132 LEAVE; 2133 return wait ? FAILED : SUCCESS; 2134 } 2135 } 2136 } while (wait); 2137 2138 LEAVE; 2139 return SUCCESS; 2140} 2141 2142/** 2143 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2144 * @sdev: scsi device to cancel commands 2145 * @type: type of error recovery being performed 2146 * 2147 * This sends a cancel to the VIOS for the specified device. This does 2148 * NOT send any abort to the actual device. That must be done separately. 2149 * 2150 * Returns: 2151 * 0 on success / other on failure 2152 **/ 2153static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2154{ 2155 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2156 struct scsi_target *starget = scsi_target(sdev); 2157 struct fc_rport *rport = starget_to_rport(starget); 2158 struct ibmvfc_tmf *tmf; 2159 struct ibmvfc_event *evt, *found_evt; 2160 union ibmvfc_iu rsp; 2161 int rsp_rc = -EBUSY; 2162 unsigned long flags; 2163 u16 status; 2164 2165 ENTER; 2166 spin_lock_irqsave(vhost->host->host_lock, flags); 2167 found_evt = NULL; 2168 list_for_each_entry(evt, &vhost->sent, queue) { 2169 if (evt->cmnd && evt->cmnd->device == sdev) { 2170 found_evt = evt; 2171 break; 2172 } 2173 } 2174 2175 if (!found_evt) { 2176 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2177 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2178 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2179 return 0; 2180 } 2181 2182 if (vhost->state == IBMVFC_ACTIVE) { 2183 evt = ibmvfc_get_event(vhost); 2184 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2185 2186 tmf = &evt->iu.tmf; 2187 memset(tmf, 0, sizeof(*tmf)); 2188 tmf->common.version = 1; 2189 tmf->common.opcode = IBMVFC_TMF_MAD; 2190 tmf->common.length = sizeof(*tmf); 2191 tmf->scsi_id = rport->port_id; 2192 int_to_scsilun(sdev->lun, &tmf->lun); 2193 tmf->flags = (type | IBMVFC_TMF_LUA_VALID); 2194 tmf->cancel_key = (unsigned long)sdev->hostdata; 2195 tmf->my_cancel_key = (unsigned long)starget->hostdata; 2196 2197 evt->sync_iu = &rsp; 2198 init_completion(&evt->comp); 2199 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2200 } 2201 2202 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2203 2204 if (rsp_rc != 0) { 2205 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2206 return -EIO; 2207 } 2208 2209 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2210 2211 wait_for_completion(&evt->comp); 2212 status = rsp.mad_common.status; 2213 spin_lock_irqsave(vhost->host->host_lock, flags); 2214 ibmvfc_free_event(evt); 2215 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2216 2217 if (status != IBMVFC_MAD_SUCCESS) { 2218 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2219 return -EIO; 2220 } 2221 2222 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2223 return 0; 2224} 2225 2226/** 2227 * ibmvfc_match_key - Match function for specified cancel key 2228 * @evt: ibmvfc event struct 2229 * @key: cancel key to match 2230 * 2231 * Returns: 2232 * 1 if event matches key / 0 if event does not match key 2233 **/ 2234static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2235{ 2236 unsigned long cancel_key = (unsigned long)key; 2237 2238 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2239 evt->iu.cmd.cancel_key == cancel_key) 2240 return 1; 2241 return 0; 2242} 2243 2244/** 2245 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2246 * @sdev: scsi device to abort commands 2247 * 2248 * This sends an Abort Task Set to the VIOS for the specified device. This does 2249 * NOT send any cancel to the VIOS. That must be done separately. 2250 * 2251 * Returns: 2252 * 0 on success / other on failure 2253 **/ 2254static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2255{ 2256 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2257 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2258 struct ibmvfc_cmd *tmf; 2259 struct ibmvfc_event *evt, *found_evt; 2260 union ibmvfc_iu rsp_iu; 2261 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 2262 int rc, rsp_rc = -EBUSY; 2263 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2264 int rsp_code = 0; 2265 2266 spin_lock_irqsave(vhost->host->host_lock, flags); 2267 found_evt = NULL; 2268 list_for_each_entry(evt, &vhost->sent, queue) { 2269 if (evt->cmnd && evt->cmnd->device == sdev) { 2270 found_evt = evt; 2271 break; 2272 } 2273 } 2274 2275 if (!found_evt) { 2276 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2277 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2278 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2279 return 0; 2280 } 2281 2282 if (vhost->state == IBMVFC_ACTIVE) { 2283 evt = ibmvfc_get_event(vhost); 2284 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2285 2286 tmf = &evt->iu.cmd; 2287 memset(tmf, 0, sizeof(*tmf)); 2288 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 2289 tmf->resp.len = sizeof(tmf->rsp); 2290 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 2291 tmf->payload_len = sizeof(tmf->iu); 2292 tmf->resp_len = sizeof(tmf->rsp); 2293 tmf->cancel_key = (unsigned long)sdev->hostdata; 2294 tmf->tgt_scsi_id = rport->port_id; 2295 int_to_scsilun(sdev->lun, &tmf->iu.lun); 2296 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 2297 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 2298 evt->sync_iu = &rsp_iu; 2299 2300 init_completion(&evt->comp); 2301 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2302 } 2303 2304 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2305 2306 if (rsp_rc != 0) { 2307 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2308 return -EIO; 2309 } 2310 2311 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2312 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2313 2314 if (!timeout) { 2315 rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2316 if (!rc) { 2317 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2318 if (rc == SUCCESS) 2319 rc = 0; 2320 } 2321 2322 if (rc) { 2323 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2324 ibmvfc_reset_host(vhost); 2325 rsp_rc = 0; 2326 goto out; 2327 } 2328 } 2329 2330 if (rsp_iu.cmd.status) 2331 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2332 2333 if (rsp_code) { 2334 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2335 rsp_code = fc_rsp->data.info.rsp_code; 2336 2337 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2338 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2339 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 2340 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2341 fc_rsp->scsi_status); 2342 rsp_rc = -EIO; 2343 } else 2344 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2345 2346out: 2347 spin_lock_irqsave(vhost->host->host_lock, flags); 2348 ibmvfc_free_event(evt); 2349 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2350 return rsp_rc; 2351} 2352 2353/** 2354 * ibmvfc_eh_abort_handler - Abort a command 2355 * @cmd: scsi command to abort 2356 * 2357 * Returns: 2358 * SUCCESS / FAILED 2359 **/ 2360static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2361{ 2362 struct scsi_device *sdev = cmd->device; 2363 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2364 int cancel_rc, abort_rc; 2365 int rc = FAILED; 2366 2367 ENTER; 2368 fc_block_scsi_eh(cmd); 2369 ibmvfc_wait_while_resetting(vhost); 2370 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2371 abort_rc = ibmvfc_abort_task_set(sdev); 2372 2373 if (!cancel_rc && !abort_rc) 2374 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2375 2376 LEAVE; 2377 return rc; 2378} 2379 2380/** 2381 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2382 * @cmd: scsi command struct 2383 * 2384 * Returns: 2385 * SUCCESS / FAILED 2386 **/ 2387static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2388{ 2389 struct scsi_device *sdev = cmd->device; 2390 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2391 int cancel_rc, reset_rc; 2392 int rc = FAILED; 2393 2394 ENTER; 2395 fc_block_scsi_eh(cmd); 2396 ibmvfc_wait_while_resetting(vhost); 2397 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2398 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2399 2400 if (!cancel_rc && !reset_rc) 2401 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2402 2403 LEAVE; 2404 return rc; 2405} 2406 2407/** 2408 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2409 * @sdev: scsi device struct 2410 * @data: return code 2411 * 2412 **/ 2413static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2414{ 2415 unsigned long *rc = data; 2416 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2417} 2418 2419/** 2420 * ibmvfc_eh_target_reset_handler - Reset the target 2421 * @cmd: scsi command struct 2422 * 2423 * Returns: 2424 * SUCCESS / FAILED 2425 **/ 2426static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2427{ 2428 struct scsi_device *sdev = cmd->device; 2429 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2430 struct scsi_target *starget = scsi_target(sdev); 2431 int reset_rc; 2432 int rc = FAILED; 2433 unsigned long cancel_rc = 0; 2434 2435 ENTER; 2436 fc_block_scsi_eh(cmd); 2437 ibmvfc_wait_while_resetting(vhost); 2438 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2439 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2440 2441 if (!cancel_rc && !reset_rc) 2442 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2443 2444 LEAVE; 2445 return rc; 2446} 2447 2448/** 2449 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2450 * @cmd: struct scsi_cmnd having problems 2451 * 2452 **/ 2453static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2454{ 2455 int rc; 2456 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2457 2458 fc_block_scsi_eh(cmd); 2459 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2460 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2461 return rc ? FAILED : SUCCESS; 2462} 2463 2464/** 2465 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2466 * @rport: rport struct 2467 * 2468 * Return value: 2469 * none 2470 **/ 2471static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2472{ 2473 struct Scsi_Host *shost = rport_to_shost(rport); 2474 struct ibmvfc_host *vhost = shost_priv(shost); 2475 struct fc_rport *dev_rport; 2476 struct scsi_device *sdev; 2477 unsigned long rc; 2478 2479 ENTER; 2480 shost_for_each_device(sdev, shost) { 2481 dev_rport = starget_to_rport(scsi_target(sdev)); 2482 if (dev_rport != rport) 2483 continue; 2484 ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2485 ibmvfc_abort_task_set(sdev); 2486 } 2487 2488 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 2489 2490 if (rc == FAILED) 2491 ibmvfc_issue_fc_host_lip(shost); 2492 LEAVE; 2493} 2494 2495static const struct ibmvfc_async_desc ae_desc [] = { 2496 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2497 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2498 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2499 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2500 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2501 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, 2502 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, 2503 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, 2504 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, 2505 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, 2506 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, 2507 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, 2508 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, 2509}; 2510 2511static const struct ibmvfc_async_desc unknown_ae = { 2512 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL 2513}; 2514 2515/** 2516 * ibmvfc_get_ae_desc - Get text description for async event 2517 * @ae: async event 2518 * 2519 **/ 2520static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 2521{ 2522 int i; 2523 2524 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2525 if (ae_desc[i].ae == ae) 2526 return &ae_desc[i]; 2527 2528 return &unknown_ae; 2529} 2530 2531static const struct { 2532 enum ibmvfc_ae_link_state state; 2533 const char *desc; 2534} link_desc [] = { 2535 { IBMVFC_AE_LS_LINK_UP, " link up" }, 2536 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 2537 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 2538 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 2539}; 2540 2541/** 2542 * ibmvfc_get_link_state - Get text description for link state 2543 * @state: link state 2544 * 2545 **/ 2546static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 2547{ 2548 int i; 2549 2550 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 2551 if (link_desc[i].state == state) 2552 return link_desc[i].desc; 2553 2554 return ""; 2555} 2556 2557/** 2558 * ibmvfc_handle_async - Handle an async event from the adapter 2559 * @crq: crq to process 2560 * @vhost: ibmvfc host struct 2561 * 2562 **/ 2563static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2564 struct ibmvfc_host *vhost) 2565{ 2566 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(crq->event); 2567 struct ibmvfc_target *tgt; 2568 2569 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 2570 " node_name: %llx%s\n", desc->desc, crq->scsi_id, crq->wwpn, crq->node_name, 2571 ibmvfc_get_link_state(crq->link_state)); 2572 2573 switch (crq->event) { 2574 case IBMVFC_AE_RESUME: 2575 switch (crq->link_state) { 2576 case IBMVFC_AE_LS_LINK_DOWN: 2577 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2578 break; 2579 case IBMVFC_AE_LS_LINK_DEAD: 2580 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2581 break; 2582 case IBMVFC_AE_LS_LINK_UP: 2583 case IBMVFC_AE_LS_LINK_BOUNCED: 2584 default: 2585 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2586 vhost->delay_init = 1; 2587 __ibmvfc_reset_host(vhost); 2588 break; 2589 }; 2590 2591 break; 2592 case IBMVFC_AE_LINK_UP: 2593 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2594 vhost->delay_init = 1; 2595 __ibmvfc_reset_host(vhost); 2596 break; 2597 case IBMVFC_AE_SCN_FABRIC: 2598 case IBMVFC_AE_SCN_DOMAIN: 2599 vhost->events_to_log |= IBMVFC_AE_RSCN; 2600 vhost->delay_init = 1; 2601 __ibmvfc_reset_host(vhost); 2602 break; 2603 case IBMVFC_AE_SCN_NPORT: 2604 case IBMVFC_AE_SCN_GROUP: 2605 vhost->events_to_log |= IBMVFC_AE_RSCN; 2606 ibmvfc_reinit_host(vhost); 2607 break; 2608 case IBMVFC_AE_ELS_LOGO: 2609 case IBMVFC_AE_ELS_PRLO: 2610 case IBMVFC_AE_ELS_PLOGI: 2611 list_for_each_entry(tgt, &vhost->targets, queue) { 2612 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 2613 break; 2614 if (crq->scsi_id && tgt->scsi_id != crq->scsi_id) 2615 continue; 2616 if (crq->wwpn && tgt->ids.port_name != crq->wwpn) 2617 continue; 2618 if (crq->node_name && tgt->ids.node_name != crq->node_name) 2619 continue; 2620 if (tgt->need_login && crq->event == IBMVFC_AE_ELS_LOGO) 2621 tgt->logo_rcvd = 1; 2622 if (!tgt->need_login || crq->event == IBMVFC_AE_ELS_PLOGI) { 2623 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2624 ibmvfc_reinit_host(vhost); 2625 } 2626 } 2627 break; 2628 case IBMVFC_AE_LINK_DOWN: 2629 case IBMVFC_AE_ADAPTER_FAILED: 2630 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2631 break; 2632 case IBMVFC_AE_LINK_DEAD: 2633 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2634 break; 2635 case IBMVFC_AE_HALT: 2636 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2637 break; 2638 default: 2639 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2640 break; 2641 }; 2642} 2643 2644/** 2645 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2646 * @crq: Command/Response queue 2647 * @vhost: ibmvfc host struct 2648 * 2649 **/ 2650static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2651{ 2652 long rc; 2653 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; 2654 2655 switch (crq->valid) { 2656 case IBMVFC_CRQ_INIT_RSP: 2657 switch (crq->format) { 2658 case IBMVFC_CRQ_INIT: 2659 dev_info(vhost->dev, "Partner initialized\n"); 2660 /* Send back a response */ 2661 rc = ibmvfc_send_crq_init_complete(vhost); 2662 if (rc == 0) 2663 ibmvfc_init_host(vhost); 2664 else 2665 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2666 break; 2667 case IBMVFC_CRQ_INIT_COMPLETE: 2668 dev_info(vhost->dev, "Partner initialization complete\n"); 2669 ibmvfc_init_host(vhost); 2670 break; 2671 default: 2672 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2673 } 2674 return; 2675 case IBMVFC_CRQ_XPORT_EVENT: 2676 vhost->state = IBMVFC_NO_CRQ; 2677 vhost->logged_in = 0; 2678 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2679 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2680 /* We need to re-setup the interpartition connection */ 2681 dev_info(vhost->dev, "Re-enabling adapter\n"); 2682 vhost->client_migrated = 1; 2683 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2684 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2685 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 2686 } else { 2687 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2688 ibmvfc_purge_requests(vhost, DID_ERROR); 2689 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2690 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 2691 } 2692 return; 2693 case IBMVFC_CRQ_CMD_RSP: 2694 break; 2695 default: 2696 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2697 return; 2698 } 2699 2700 if (crq->format == IBMVFC_ASYNC_EVENT) 2701 return; 2702 2703 /* The only kind of payload CRQs we should get are responses to 2704 * things we send. Make sure this response is to something we 2705 * actually sent 2706 */ 2707 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2708 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2709 crq->ioba); 2710 return; 2711 } 2712 2713 if (unlikely(atomic_read(&evt->free))) { 2714 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2715 crq->ioba); 2716 return; 2717 } 2718 2719 del_timer(&evt->timer); 2720 list_del(&evt->queue); 2721 ibmvfc_trc_end(evt); 2722 evt->done(evt); 2723} 2724 2725/** 2726 * ibmvfc_scan_finished - Check if the device scan is done. 2727 * @shost: scsi host struct 2728 * @time: current elapsed time 2729 * 2730 * Returns: 2731 * 0 if scan is not done / 1 if scan is done 2732 **/ 2733static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2734{ 2735 unsigned long flags; 2736 struct ibmvfc_host *vhost = shost_priv(shost); 2737 int done = 0; 2738 2739 spin_lock_irqsave(shost->host_lock, flags); 2740 if (time >= (init_timeout * HZ)) { 2741 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2742 "continuing initialization\n", init_timeout); 2743 done = 1; 2744 } 2745 2746 if (vhost->scan_complete) 2747 done = 1; 2748 spin_unlock_irqrestore(shost->host_lock, flags); 2749 return done; 2750} 2751 2752/** 2753 * ibmvfc_slave_alloc - Setup the device's task set value 2754 * @sdev: struct scsi_device device to configure 2755 * 2756 * Set the device's task set value so that error handling works as 2757 * expected. 2758 * 2759 * Returns: 2760 * 0 on success / -ENXIO if device does not exist 2761 **/ 2762static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2763{ 2764 struct Scsi_Host *shost = sdev->host; 2765 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2766 struct ibmvfc_host *vhost = shost_priv(shost); 2767 unsigned long flags = 0; 2768 2769 if (!rport || fc_remote_port_chkready(rport)) 2770 return -ENXIO; 2771 2772 spin_lock_irqsave(shost->host_lock, flags); 2773 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2774 spin_unlock_irqrestore(shost->host_lock, flags); 2775 return 0; 2776} 2777 2778/** 2779 * ibmvfc_target_alloc - Setup the target's task set value 2780 * @starget: struct scsi_target 2781 * 2782 * Set the target's task set value so that error handling works as 2783 * expected. 2784 * 2785 * Returns: 2786 * 0 on success / -ENXIO if device does not exist 2787 **/ 2788static int ibmvfc_target_alloc(struct scsi_target *starget) 2789{ 2790 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2791 struct ibmvfc_host *vhost = shost_priv(shost); 2792 unsigned long flags = 0; 2793 2794 spin_lock_irqsave(shost->host_lock, flags); 2795 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2796 spin_unlock_irqrestore(shost->host_lock, flags); 2797 return 0; 2798} 2799 2800/** 2801 * ibmvfc_slave_configure - Configure the device 2802 * @sdev: struct scsi_device device to configure 2803 * 2804 * Enable allow_restart for a device if it is a disk. Adjust the 2805 * queue_depth here also. 2806 * 2807 * Returns: 2808 * 0 2809 **/ 2810static int ibmvfc_slave_configure(struct scsi_device *sdev) 2811{ 2812 struct Scsi_Host *shost = sdev->host; 2813 unsigned long flags = 0; 2814 2815 spin_lock_irqsave(shost->host_lock, flags); 2816 if (sdev->type == TYPE_DISK) 2817 sdev->allow_restart = 1; 2818 2819 if (sdev->tagged_supported) { 2820 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 2821 scsi_activate_tcq(sdev, sdev->queue_depth); 2822 } else 2823 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2824 spin_unlock_irqrestore(shost->host_lock, flags); 2825 return 0; 2826} 2827 2828/** 2829 * ibmvfc_change_queue_depth - Change the device's queue depth 2830 * @sdev: scsi device struct 2831 * @qdepth: depth to set 2832 * @reason: calling context 2833 * 2834 * Return value: 2835 * actual depth set 2836 **/ 2837static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth, 2838 int reason) 2839{ 2840 if (reason != SCSI_QDEPTH_DEFAULT) 2841 return -EOPNOTSUPP; 2842 2843 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2844 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2845 2846 scsi_adjust_queue_depth(sdev, 0, qdepth); 2847 return sdev->queue_depth; 2848} 2849 2850/** 2851 * ibmvfc_change_queue_type - Change the device's queue type 2852 * @sdev: scsi device struct 2853 * @tag_type: type of tags to use 2854 * 2855 * Return value: 2856 * actual queue type set 2857 **/ 2858static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) 2859{ 2860 if (sdev->tagged_supported) { 2861 scsi_set_tag_type(sdev, tag_type); 2862 2863 if (tag_type) 2864 scsi_activate_tcq(sdev, sdev->queue_depth); 2865 else 2866 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2867 } else 2868 tag_type = 0; 2869 2870 return tag_type; 2871} 2872 2873static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2874 struct device_attribute *attr, char *buf) 2875{ 2876 struct Scsi_Host *shost = class_to_shost(dev); 2877 struct ibmvfc_host *vhost = shost_priv(shost); 2878 2879 return snprintf(buf, PAGE_SIZE, "%s\n", 2880 vhost->login_buf->resp.partition_name); 2881} 2882 2883static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2884 struct device_attribute *attr, char *buf) 2885{ 2886 struct Scsi_Host *shost = class_to_shost(dev); 2887 struct ibmvfc_host *vhost = shost_priv(shost); 2888 2889 return snprintf(buf, PAGE_SIZE, "%s\n", 2890 vhost->login_buf->resp.device_name); 2891} 2892 2893static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2894 struct device_attribute *attr, char *buf) 2895{ 2896 struct Scsi_Host *shost = class_to_shost(dev); 2897 struct ibmvfc_host *vhost = shost_priv(shost); 2898 2899 return snprintf(buf, PAGE_SIZE, "%s\n", 2900 vhost->login_buf->resp.port_loc_code); 2901} 2902 2903static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2904 struct device_attribute *attr, char *buf) 2905{ 2906 struct Scsi_Host *shost = class_to_shost(dev); 2907 struct ibmvfc_host *vhost = shost_priv(shost); 2908 2909 return snprintf(buf, PAGE_SIZE, "%s\n", 2910 vhost->login_buf->resp.drc_name); 2911} 2912 2913static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2914 struct device_attribute *attr, char *buf) 2915{ 2916 struct Scsi_Host *shost = class_to_shost(dev); 2917 struct ibmvfc_host *vhost = shost_priv(shost); 2918 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2919} 2920 2921static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 2922 struct device_attribute *attr, char *buf) 2923{ 2924 struct Scsi_Host *shost = class_to_shost(dev); 2925 struct ibmvfc_host *vhost = shost_priv(shost); 2926 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); 2927} 2928 2929/** 2930 * ibmvfc_show_log_level - Show the adapter's error logging level 2931 * @dev: class device struct 2932 * @buf: buffer 2933 * 2934 * Return value: 2935 * number of bytes printed to buffer 2936 **/ 2937static ssize_t ibmvfc_show_log_level(struct device *dev, 2938 struct device_attribute *attr, char *buf) 2939{ 2940 struct Scsi_Host *shost = class_to_shost(dev); 2941 struct ibmvfc_host *vhost = shost_priv(shost); 2942 unsigned long flags = 0; 2943 int len; 2944 2945 spin_lock_irqsave(shost->host_lock, flags); 2946 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2947 spin_unlock_irqrestore(shost->host_lock, flags); 2948 return len; 2949} 2950 2951/** 2952 * ibmvfc_store_log_level - Change the adapter's error logging level 2953 * @dev: class device struct 2954 * @buf: buffer 2955 * 2956 * Return value: 2957 * number of bytes printed to buffer 2958 **/ 2959static ssize_t ibmvfc_store_log_level(struct device *dev, 2960 struct device_attribute *attr, 2961 const char *buf, size_t count) 2962{ 2963 struct Scsi_Host *shost = class_to_shost(dev); 2964 struct ibmvfc_host *vhost = shost_priv(shost); 2965 unsigned long flags = 0; 2966 2967 spin_lock_irqsave(shost->host_lock, flags); 2968 vhost->log_level = simple_strtoul(buf, NULL, 10); 2969 spin_unlock_irqrestore(shost->host_lock, flags); 2970 return strlen(buf); 2971} 2972 2973static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 2974static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 2975static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 2976static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 2977static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 2978static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 2979static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 2980 ibmvfc_show_log_level, ibmvfc_store_log_level); 2981 2982#ifdef CONFIG_SCSI_IBMVFC_TRACE 2983/** 2984 * ibmvfc_read_trace - Dump the adapter trace 2985 * @filp: open sysfs file 2986 * @kobj: kobject struct 2987 * @bin_attr: bin_attribute struct 2988 * @buf: buffer 2989 * @off: offset 2990 * @count: buffer size 2991 * 2992 * Return value: 2993 * number of bytes printed to buffer 2994 **/ 2995static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 2996 struct bin_attribute *bin_attr, 2997 char *buf, loff_t off, size_t count) 2998{ 2999 struct device *dev = container_of(kobj, struct device, kobj); 3000 struct Scsi_Host *shost = class_to_shost(dev); 3001 struct ibmvfc_host *vhost = shost_priv(shost); 3002 unsigned long flags = 0; 3003 int size = IBMVFC_TRACE_SIZE; 3004 char *src = (char *)vhost->trace; 3005 3006 if (off > size) 3007 return 0; 3008 if (off + count > size) { 3009 size -= off; 3010 count = size; 3011 } 3012 3013 spin_lock_irqsave(shost->host_lock, flags); 3014 memcpy(buf, &src[off], count); 3015 spin_unlock_irqrestore(shost->host_lock, flags); 3016 return count; 3017} 3018 3019static struct bin_attribute ibmvfc_trace_attr = { 3020 .attr = { 3021 .name = "trace", 3022 .mode = S_IRUGO, 3023 }, 3024 .size = 0, 3025 .read = ibmvfc_read_trace, 3026}; 3027#endif 3028 3029static struct device_attribute *ibmvfc_attrs[] = { 3030 &dev_attr_partition_name, 3031 &dev_attr_device_name, 3032 &dev_attr_port_loc_code, 3033 &dev_attr_drc_name, 3034 &dev_attr_npiv_version, 3035 &dev_attr_capabilities, 3036 &dev_attr_log_level, 3037 NULL 3038}; 3039 3040static struct scsi_host_template driver_template = { 3041 .module = THIS_MODULE, 3042 .name = "IBM POWER Virtual FC Adapter", 3043 .proc_name = IBMVFC_NAME, 3044 .queuecommand = ibmvfc_queuecommand, 3045 .eh_abort_handler = ibmvfc_eh_abort_handler, 3046 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3047 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3048 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3049 .slave_alloc = ibmvfc_slave_alloc, 3050 .slave_configure = ibmvfc_slave_configure, 3051 .target_alloc = ibmvfc_target_alloc, 3052 .scan_finished = ibmvfc_scan_finished, 3053 .change_queue_depth = ibmvfc_change_queue_depth, 3054 .change_queue_type = ibmvfc_change_queue_type, 3055 .cmd_per_lun = 16, 3056 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3057 .this_id = -1, 3058 .sg_tablesize = SG_ALL, 3059 .max_sectors = IBMVFC_MAX_SECTORS, 3060 .use_clustering = ENABLE_CLUSTERING, 3061 .shost_attrs = ibmvfc_attrs, 3062}; 3063 3064/** 3065 * ibmvfc_next_async_crq - Returns the next entry in async queue 3066 * @vhost: ibmvfc host struct 3067 * 3068 * Returns: 3069 * Pointer to next entry in queue / NULL if empty 3070 **/ 3071static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3072{ 3073 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 3074 struct ibmvfc_async_crq *crq; 3075 3076 crq = &async_crq->msgs[async_crq->cur]; 3077 if (crq->valid & 0x80) { 3078 if (++async_crq->cur == async_crq->size) 3079 async_crq->cur = 0; 3080 rmb(); 3081 } else 3082 crq = NULL; 3083 3084 return crq; 3085} 3086 3087/** 3088 * ibmvfc_next_crq - Returns the next entry in message queue 3089 * @vhost: ibmvfc host struct 3090 * 3091 * Returns: 3092 * Pointer to next entry in queue / NULL if empty 3093 **/ 3094static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3095{ 3096 struct ibmvfc_crq_queue *queue = &vhost->crq; 3097 struct ibmvfc_crq *crq; 3098 3099 crq = &queue->msgs[queue->cur]; 3100 if (crq->valid & 0x80) { 3101 if (++queue->cur == queue->size) 3102 queue->cur = 0; 3103 rmb(); 3104 } else 3105 crq = NULL; 3106 3107 return crq; 3108} 3109 3110/** 3111 * ibmvfc_interrupt - Interrupt handler 3112 * @irq: number of irq to handle, not used 3113 * @dev_instance: ibmvfc_host that received interrupt 3114 * 3115 * Returns: 3116 * IRQ_HANDLED 3117 **/ 3118static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3119{ 3120 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3121 unsigned long flags; 3122 3123 spin_lock_irqsave(vhost->host->host_lock, flags); 3124 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3125 tasklet_schedule(&vhost->tasklet); 3126 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3127 return IRQ_HANDLED; 3128} 3129 3130/** 3131 * ibmvfc_tasklet - Interrupt handler tasklet 3132 * @data: ibmvfc host struct 3133 * 3134 * Returns: 3135 * Nothing 3136 **/ 3137static void ibmvfc_tasklet(void *data) 3138{ 3139 struct ibmvfc_host *vhost = data; 3140 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3141 struct ibmvfc_crq *crq; 3142 struct ibmvfc_async_crq *async; 3143 unsigned long flags; 3144 int done = 0; 3145 3146 spin_lock_irqsave(vhost->host->host_lock, flags); 3147 while (!done) { 3148 /* Pull all the valid messages off the async CRQ */ 3149 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3150 ibmvfc_handle_async(async, vhost); 3151 async->valid = 0; 3152 wmb(); 3153 } 3154 3155 /* Pull all the valid messages off the CRQ */ 3156 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3157 ibmvfc_handle_crq(crq, vhost); 3158 crq->valid = 0; 3159 wmb(); 3160 } 3161 3162 vio_enable_interrupts(vdev); 3163 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3164 vio_disable_interrupts(vdev); 3165 ibmvfc_handle_async(async, vhost); 3166 async->valid = 0; 3167 wmb(); 3168 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3169 vio_disable_interrupts(vdev); 3170 ibmvfc_handle_crq(crq, vhost); 3171 crq->valid = 0; 3172 wmb(); 3173 } else 3174 done = 1; 3175 } 3176 3177 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3178} 3179 3180/** 3181 * ibmvfc_init_tgt - Set the next init job step for the target 3182 * @tgt: ibmvfc target struct 3183 * @job_step: job step to perform 3184 * 3185 **/ 3186static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3187 void (*job_step) (struct ibmvfc_target *)) 3188{ 3189 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 3190 tgt->job_step = job_step; 3191 wake_up(&tgt->vhost->work_wait_q); 3192} 3193 3194/** 3195 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3196 * @tgt: ibmvfc target struct 3197 * @job_step: initialization job step 3198 * 3199 * Returns: 1 if step will be retried / 0 if not 3200 * 3201 **/ 3202static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3203 void (*job_step) (struct ibmvfc_target *)) 3204{ 3205 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3206 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3207 wake_up(&tgt->vhost->work_wait_q); 3208 return 0; 3209 } else 3210 ibmvfc_init_tgt(tgt, job_step); 3211 return 1; 3212} 3213 3214/* Defined in FC-LS */ 3215static const struct { 3216 int code; 3217 int retry; 3218 int logged_in; 3219} prli_rsp [] = { 3220 { 0, 1, 0 }, 3221 { 1, 0, 1 }, 3222 { 2, 1, 0 }, 3223 { 3, 1, 0 }, 3224 { 4, 0, 0 }, 3225 { 5, 0, 0 }, 3226 { 6, 0, 1 }, 3227 { 7, 0, 0 }, 3228 { 8, 1, 0 }, 3229}; 3230 3231/** 3232 * ibmvfc_get_prli_rsp - Find PRLI response index 3233 * @flags: PRLI response flags 3234 * 3235 **/ 3236static int ibmvfc_get_prli_rsp(u16 flags) 3237{ 3238 int i; 3239 int code = (flags & 0x0f00) >> 8; 3240 3241 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3242 if (prli_rsp[i].code == code) 3243 return i; 3244 3245 return 0; 3246} 3247 3248/** 3249 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3250 * @evt: ibmvfc event struct 3251 * 3252 **/ 3253static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3254{ 3255 struct ibmvfc_target *tgt = evt->tgt; 3256 struct ibmvfc_host *vhost = evt->vhost; 3257 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3258 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3259 u32 status = rsp->common.status; 3260 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3261 3262 vhost->discovery_threads--; 3263 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3264 switch (status) { 3265 case IBMVFC_MAD_SUCCESS: 3266 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3267 parms->type, parms->flags, parms->service_parms); 3268 3269 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3270 index = ibmvfc_get_prli_rsp(parms->flags); 3271 if (prli_rsp[index].logged_in) { 3272 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) { 3273 tgt->need_login = 0; 3274 tgt->ids.roles = 0; 3275 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC) 3276 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3277 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC) 3278 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3279 tgt->add_rport = 1; 3280 } else 3281 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3282 } else if (prli_rsp[index].retry) 3283 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3284 else 3285 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3286 } else 3287 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3288 break; 3289 case IBMVFC_MAD_DRIVER_FAILED: 3290 break; 3291 case IBMVFC_MAD_CRQ_ERROR: 3292 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3293 break; 3294 case IBMVFC_MAD_FAILED: 3295 default: 3296 if ((rsp->status & IBMVFC_VIOS_FAILURE) && rsp->error == IBMVFC_PLOGI_REQUIRED) 3297 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3298 else if (tgt->logo_rcvd) 3299 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3300 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3301 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3302 else 3303 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3304 3305 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3306 ibmvfc_get_cmd_error(rsp->status, rsp->error), 3307 rsp->status, rsp->error, status); 3308 break; 3309 }; 3310 3311 kref_put(&tgt->kref, ibmvfc_release_tgt); 3312 ibmvfc_free_event(evt); 3313 wake_up(&vhost->work_wait_q); 3314} 3315 3316/** 3317 * ibmvfc_tgt_send_prli - Send a process login 3318 * @tgt: ibmvfc target struct 3319 * 3320 **/ 3321static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3322{ 3323 struct ibmvfc_process_login *prli; 3324 struct ibmvfc_host *vhost = tgt->vhost; 3325 struct ibmvfc_event *evt; 3326 3327 if (vhost->discovery_threads >= disc_threads) 3328 return; 3329 3330 kref_get(&tgt->kref); 3331 evt = ibmvfc_get_event(vhost); 3332 vhost->discovery_threads++; 3333 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 3334 evt->tgt = tgt; 3335 prli = &evt->iu.prli; 3336 memset(prli, 0, sizeof(*prli)); 3337 prli->common.version = 1; 3338 prli->common.opcode = IBMVFC_PROCESS_LOGIN; 3339 prli->common.length = sizeof(*prli); 3340 prli->scsi_id = tgt->scsi_id; 3341 3342 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 3343 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; 3344 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; 3345 3346 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3347 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3348 vhost->discovery_threads--; 3349 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3350 kref_put(&tgt->kref, ibmvfc_release_tgt); 3351 } else 3352 tgt_dbg(tgt, "Sent process login\n"); 3353} 3354 3355/** 3356 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 3357 * @evt: ibmvfc event struct 3358 * 3359 **/ 3360static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 3361{ 3362 struct ibmvfc_target *tgt = evt->tgt; 3363 struct ibmvfc_host *vhost = evt->vhost; 3364 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 3365 u32 status = rsp->common.status; 3366 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3367 3368 vhost->discovery_threads--; 3369 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3370 switch (status) { 3371 case IBMVFC_MAD_SUCCESS: 3372 tgt_dbg(tgt, "Port Login succeeded\n"); 3373 if (tgt->ids.port_name && 3374 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 3375 vhost->reinit = 1; 3376 tgt_dbg(tgt, "Port re-init required\n"); 3377 break; 3378 } 3379 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3380 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3381 tgt->ids.port_id = tgt->scsi_id; 3382 memcpy(&tgt->service_parms, &rsp->service_parms, 3383 sizeof(tgt->service_parms)); 3384 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3385 sizeof(tgt->service_parms_change)); 3386 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3387 break; 3388 case IBMVFC_MAD_DRIVER_FAILED: 3389 break; 3390 case IBMVFC_MAD_CRQ_ERROR: 3391 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3392 break; 3393 case IBMVFC_MAD_FAILED: 3394 default: 3395 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3396 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3397 else 3398 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3399 3400 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3401 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3402 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3403 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); 3404 break; 3405 }; 3406 3407 kref_put(&tgt->kref, ibmvfc_release_tgt); 3408 ibmvfc_free_event(evt); 3409 wake_up(&vhost->work_wait_q); 3410} 3411 3412/** 3413 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3414 * @tgt: ibmvfc target struct 3415 * 3416 **/ 3417static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3418{ 3419 struct ibmvfc_port_login *plogi; 3420 struct ibmvfc_host *vhost = tgt->vhost; 3421 struct ibmvfc_event *evt; 3422 3423 if (vhost->discovery_threads >= disc_threads) 3424 return; 3425 3426 kref_get(&tgt->kref); 3427 tgt->logo_rcvd = 0; 3428 evt = ibmvfc_get_event(vhost); 3429 vhost->discovery_threads++; 3430 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3431 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3432 evt->tgt = tgt; 3433 plogi = &evt->iu.plogi; 3434 memset(plogi, 0, sizeof(*plogi)); 3435 plogi->common.version = 1; 3436 plogi->common.opcode = IBMVFC_PORT_LOGIN; 3437 plogi->common.length = sizeof(*plogi); 3438 plogi->scsi_id = tgt->scsi_id; 3439 3440 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3441 vhost->discovery_threads--; 3442 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3443 kref_put(&tgt->kref, ibmvfc_release_tgt); 3444 } else 3445 tgt_dbg(tgt, "Sent port login\n"); 3446} 3447 3448/** 3449 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3450 * @evt: ibmvfc event struct 3451 * 3452 **/ 3453static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3454{ 3455 struct ibmvfc_target *tgt = evt->tgt; 3456 struct ibmvfc_host *vhost = evt->vhost; 3457 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3458 u32 status = rsp->common.status; 3459 3460 vhost->discovery_threads--; 3461 ibmvfc_free_event(evt); 3462 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3463 3464 switch (status) { 3465 case IBMVFC_MAD_SUCCESS: 3466 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3467 break; 3468 case IBMVFC_MAD_DRIVER_FAILED: 3469 kref_put(&tgt->kref, ibmvfc_release_tgt); 3470 wake_up(&vhost->work_wait_q); 3471 return; 3472 case IBMVFC_MAD_FAILED: 3473 default: 3474 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3475 break; 3476 }; 3477 3478 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3479 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3480 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3481 tgt->scsi_id != tgt->new_scsi_id) 3482 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3483 kref_put(&tgt->kref, ibmvfc_release_tgt); 3484 wake_up(&vhost->work_wait_q); 3485} 3486 3487/** 3488 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3489 * @tgt: ibmvfc target struct 3490 * 3491 **/ 3492static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3493{ 3494 struct ibmvfc_implicit_logout *mad; 3495 struct ibmvfc_host *vhost = tgt->vhost; 3496 struct ibmvfc_event *evt; 3497 3498 if (vhost->discovery_threads >= disc_threads) 3499 return; 3500 3501 kref_get(&tgt->kref); 3502 evt = ibmvfc_get_event(vhost); 3503 vhost->discovery_threads++; 3504 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3505 evt->tgt = tgt; 3506 mad = &evt->iu.implicit_logout; 3507 memset(mad, 0, sizeof(*mad)); 3508 mad->common.version = 1; 3509 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; 3510 mad->common.length = sizeof(*mad); 3511 mad->old_scsi_id = tgt->scsi_id; 3512 3513 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3514 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3515 vhost->discovery_threads--; 3516 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3517 kref_put(&tgt->kref, ibmvfc_release_tgt); 3518 } else 3519 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3520} 3521 3522/** 3523 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3524 * @mad: ibmvfc passthru mad struct 3525 * @tgt: ibmvfc target struct 3526 * 3527 * Returns: 3528 * 1 if PLOGI needed / 0 if PLOGI not needed 3529 **/ 3530static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3531 struct ibmvfc_target *tgt) 3532{ 3533 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3534 sizeof(tgt->ids.port_name))) 3535 return 1; 3536 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3537 sizeof(tgt->ids.node_name))) 3538 return 1; 3539 if (mad->fc_iu.response[6] != tgt->scsi_id) 3540 return 1; 3541 return 0; 3542} 3543 3544/** 3545 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3546 * @evt: ibmvfc event struct 3547 * 3548 **/ 3549static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3550{ 3551 struct ibmvfc_target *tgt = evt->tgt; 3552 struct ibmvfc_host *vhost = evt->vhost; 3553 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3554 u32 status = mad->common.status; 3555 u8 fc_reason, fc_explain; 3556 3557 vhost->discovery_threads--; 3558 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3559 del_timer(&tgt->timer); 3560 3561 switch (status) { 3562 case IBMVFC_MAD_SUCCESS: 3563 tgt_dbg(tgt, "ADISC succeeded\n"); 3564 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3565 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3566 break; 3567 case IBMVFC_MAD_DRIVER_FAILED: 3568 break; 3569 case IBMVFC_MAD_FAILED: 3570 default: 3571 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3572 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; 3573 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; 3574 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3575 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), 3576 mad->iu.status, mad->iu.error, 3577 ibmvfc_get_fc_type(fc_reason), fc_reason, 3578 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3579 break; 3580 }; 3581 3582 kref_put(&tgt->kref, ibmvfc_release_tgt); 3583 ibmvfc_free_event(evt); 3584 wake_up(&vhost->work_wait_q); 3585} 3586 3587/** 3588 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3589 * @evt: ibmvfc event struct 3590 * 3591 **/ 3592static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3593{ 3594 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3595 3596 memset(mad, 0, sizeof(*mad)); 3597 mad->common.version = 1; 3598 mad->common.opcode = IBMVFC_PASSTHRU; 3599 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 3600 mad->cmd_ioba.va = (u64)evt->crq.ioba + 3601 offsetof(struct ibmvfc_passthru_mad, iu); 3602 mad->cmd_ioba.len = sizeof(mad->iu); 3603 mad->iu.cmd_len = sizeof(mad->fc_iu.payload); 3604 mad->iu.rsp_len = sizeof(mad->fc_iu.response); 3605 mad->iu.cmd.va = (u64)evt->crq.ioba + 3606 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3607 offsetof(struct ibmvfc_passthru_fc_iu, payload); 3608 mad->iu.cmd.len = sizeof(mad->fc_iu.payload); 3609 mad->iu.rsp.va = (u64)evt->crq.ioba + 3610 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3611 offsetof(struct ibmvfc_passthru_fc_iu, response); 3612 mad->iu.rsp.len = sizeof(mad->fc_iu.response); 3613} 3614 3615/** 3616 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3617 * @evt: ibmvfc event struct 3618 * 3619 * Just cleanup this event struct. Everything else is handled by 3620 * the ADISC completion handler. If the ADISC never actually comes 3621 * back, we still have the timer running on the ADISC event struct 3622 * which will fire and cause the CRQ to get reset. 3623 * 3624 **/ 3625static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3626{ 3627 struct ibmvfc_host *vhost = evt->vhost; 3628 struct ibmvfc_target *tgt = evt->tgt; 3629 3630 tgt_dbg(tgt, "ADISC cancel complete\n"); 3631 vhost->abort_threads--; 3632 ibmvfc_free_event(evt); 3633 kref_put(&tgt->kref, ibmvfc_release_tgt); 3634 wake_up(&vhost->work_wait_q); 3635} 3636 3637/** 3638 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3639 * @tgt: ibmvfc target struct 3640 * 3641 * If an ADISC times out, send a cancel. If the cancel times 3642 * out, reset the CRQ. When the ADISC comes back as cancelled, 3643 * log back into the target. 3644 **/ 3645static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) 3646{ 3647 struct ibmvfc_host *vhost = tgt->vhost; 3648 struct ibmvfc_event *evt; 3649 struct ibmvfc_tmf *tmf; 3650 unsigned long flags; 3651 int rc; 3652 3653 tgt_dbg(tgt, "ADISC timeout\n"); 3654 spin_lock_irqsave(vhost->host->host_lock, flags); 3655 if (vhost->abort_threads >= disc_threads || 3656 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3657 vhost->state != IBMVFC_INITIALIZING || 3658 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3659 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3660 return; 3661 } 3662 3663 vhost->abort_threads++; 3664 kref_get(&tgt->kref); 3665 evt = ibmvfc_get_event(vhost); 3666 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3667 3668 evt->tgt = tgt; 3669 tmf = &evt->iu.tmf; 3670 memset(tmf, 0, sizeof(*tmf)); 3671 tmf->common.version = 1; 3672 tmf->common.opcode = IBMVFC_TMF_MAD; 3673 tmf->common.length = sizeof(*tmf); 3674 tmf->scsi_id = tgt->scsi_id; 3675 tmf->cancel_key = tgt->cancel_key; 3676 3677 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3678 3679 if (rc) { 3680 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3681 vhost->abort_threads--; 3682 kref_put(&tgt->kref, ibmvfc_release_tgt); 3683 __ibmvfc_reset_host(vhost); 3684 } else 3685 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3686 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3687} 3688 3689/** 3690 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3691 * @tgt: ibmvfc target struct 3692 * 3693 * When sending an ADISC we end up with two timers running. The 3694 * first timer is the timer in the ibmvfc target struct. If this 3695 * fires, we send a cancel to the target. The second timer is the 3696 * timer on the ibmvfc event for the ADISC, which is longer. If that 3697 * fires, it means the ADISC timed out and our attempt to cancel it 3698 * also failed, so we need to reset the CRQ. 3699 **/ 3700static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3701{ 3702 struct ibmvfc_passthru_mad *mad; 3703 struct ibmvfc_host *vhost = tgt->vhost; 3704 struct ibmvfc_event *evt; 3705 3706 if (vhost->discovery_threads >= disc_threads) 3707 return; 3708 3709 kref_get(&tgt->kref); 3710 evt = ibmvfc_get_event(vhost); 3711 vhost->discovery_threads++; 3712 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3713 evt->tgt = tgt; 3714 3715 ibmvfc_init_passthru(evt); 3716 mad = &evt->iu.passthru; 3717 mad->iu.flags = IBMVFC_FC_ELS; 3718 mad->iu.scsi_id = tgt->scsi_id; 3719 mad->iu.cancel_key = tgt->cancel_key; 3720 3721 mad->fc_iu.payload[0] = IBMVFC_ADISC; 3722 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3723 sizeof(vhost->login_buf->resp.port_name)); 3724 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3725 sizeof(vhost->login_buf->resp.node_name)); 3726 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; 3727 3728 if (timer_pending(&tgt->timer)) 3729 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3730 else { 3731 tgt->timer.data = (unsigned long) tgt; 3732 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3733 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; 3734 add_timer(&tgt->timer); 3735 } 3736 3737 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3738 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3739 vhost->discovery_threads--; 3740 del_timer(&tgt->timer); 3741 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3742 kref_put(&tgt->kref, ibmvfc_release_tgt); 3743 } else 3744 tgt_dbg(tgt, "Sent ADISC\n"); 3745} 3746 3747/** 3748 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3749 * @evt: ibmvfc event struct 3750 * 3751 **/ 3752static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3753{ 3754 struct ibmvfc_target *tgt = evt->tgt; 3755 struct ibmvfc_host *vhost = evt->vhost; 3756 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3757 u32 status = rsp->common.status; 3758 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3759 3760 vhost->discovery_threads--; 3761 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3762 switch (status) { 3763 case IBMVFC_MAD_SUCCESS: 3764 tgt_dbg(tgt, "Query Target succeeded\n"); 3765 tgt->new_scsi_id = rsp->scsi_id; 3766 if (rsp->scsi_id != tgt->scsi_id) 3767 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3768 else 3769 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3770 break; 3771 case IBMVFC_MAD_DRIVER_FAILED: 3772 break; 3773 case IBMVFC_MAD_CRQ_ERROR: 3774 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3775 break; 3776 case IBMVFC_MAD_FAILED: 3777 default: 3778 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3779 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && 3780 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) 3781 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3782 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3783 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3784 else 3785 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3786 3787 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3788 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3789 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3790 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); 3791 break; 3792 }; 3793 3794 kref_put(&tgt->kref, ibmvfc_release_tgt); 3795 ibmvfc_free_event(evt); 3796 wake_up(&vhost->work_wait_q); 3797} 3798 3799/** 3800 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3801 * @tgt: ibmvfc target struct 3802 * 3803 **/ 3804static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3805{ 3806 struct ibmvfc_query_tgt *query_tgt; 3807 struct ibmvfc_host *vhost = tgt->vhost; 3808 struct ibmvfc_event *evt; 3809 3810 if (vhost->discovery_threads >= disc_threads) 3811 return; 3812 3813 kref_get(&tgt->kref); 3814 evt = ibmvfc_get_event(vhost); 3815 vhost->discovery_threads++; 3816 evt->tgt = tgt; 3817 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3818 query_tgt = &evt->iu.query_tgt; 3819 memset(query_tgt, 0, sizeof(*query_tgt)); 3820 query_tgt->common.version = 1; 3821 query_tgt->common.opcode = IBMVFC_QUERY_TARGET; 3822 query_tgt->common.length = sizeof(*query_tgt); 3823 query_tgt->wwpn = tgt->ids.port_name; 3824 3825 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3826 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3827 vhost->discovery_threads--; 3828 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3829 kref_put(&tgt->kref, ibmvfc_release_tgt); 3830 } else 3831 tgt_dbg(tgt, "Sent Query Target\n"); 3832} 3833 3834/** 3835 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3836 * @vhost: ibmvfc host struct 3837 * @scsi_id: SCSI ID to allocate target for 3838 * 3839 * Returns: 3840 * 0 on success / other on failure 3841 **/ 3842static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3843{ 3844 struct ibmvfc_target *tgt; 3845 unsigned long flags; 3846 3847 spin_lock_irqsave(vhost->host->host_lock, flags); 3848 list_for_each_entry(tgt, &vhost->targets, queue) { 3849 if (tgt->scsi_id == scsi_id) { 3850 if (tgt->need_login) 3851 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3852 goto unlock_out; 3853 } 3854 } 3855 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3856 3857 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3858 if (!tgt) { 3859 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", 3860 scsi_id); 3861 return -ENOMEM; 3862 } 3863 3864 memset(tgt, 0, sizeof(*tgt)); 3865 tgt->scsi_id = scsi_id; 3866 tgt->new_scsi_id = scsi_id; 3867 tgt->vhost = vhost; 3868 tgt->need_login = 1; 3869 tgt->cancel_key = vhost->task_set++; 3870 init_timer(&tgt->timer); 3871 kref_init(&tgt->kref); 3872 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3873 spin_lock_irqsave(vhost->host->host_lock, flags); 3874 list_add_tail(&tgt->queue, &vhost->targets); 3875 3876unlock_out: 3877 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3878 return 0; 3879} 3880 3881/** 3882 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3883 * @vhost: ibmvfc host struct 3884 * 3885 * Returns: 3886 * 0 on success / other on failure 3887 **/ 3888static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3889{ 3890 int i, rc; 3891 3892 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3893 rc = ibmvfc_alloc_target(vhost, 3894 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); 3895 3896 return rc; 3897} 3898 3899/** 3900 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3901 * @evt: ibmvfc event struct 3902 * 3903 **/ 3904static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3905{ 3906 struct ibmvfc_host *vhost = evt->vhost; 3907 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3908 u32 mad_status = rsp->common.status; 3909 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3910 3911 switch (mad_status) { 3912 case IBMVFC_MAD_SUCCESS: 3913 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3914 vhost->num_targets = rsp->num_written; 3915 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3916 break; 3917 case IBMVFC_MAD_FAILED: 3918 level += ibmvfc_retry_host_init(vhost); 3919 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 3920 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3921 break; 3922 case IBMVFC_MAD_DRIVER_FAILED: 3923 break; 3924 default: 3925 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3926 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3927 break; 3928 } 3929 3930 ibmvfc_free_event(evt); 3931 wake_up(&vhost->work_wait_q); 3932} 3933 3934/** 3935 * ibmvfc_discover_targets - Send Discover Targets MAD 3936 * @vhost: ibmvfc host struct 3937 * 3938 **/ 3939static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3940{ 3941 struct ibmvfc_discover_targets *mad; 3942 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3943 3944 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3945 mad = &evt->iu.discover_targets; 3946 memset(mad, 0, sizeof(*mad)); 3947 mad->common.version = 1; 3948 mad->common.opcode = IBMVFC_DISC_TARGETS; 3949 mad->common.length = sizeof(*mad); 3950 mad->bufflen = vhost->disc_buf_sz; 3951 mad->buffer.va = vhost->disc_buf_dma; 3952 mad->buffer.len = vhost->disc_buf_sz; 3953 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3954 3955 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3956 ibmvfc_dbg(vhost, "Sent discover targets\n"); 3957 else 3958 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3959} 3960 3961/** 3962 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 3963 * @evt: ibmvfc event struct 3964 * 3965 **/ 3966static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 3967{ 3968 struct ibmvfc_host *vhost = evt->vhost; 3969 u32 mad_status = evt->xfer_iu->npiv_login.common.status; 3970 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 3971 unsigned int npiv_max_sectors; 3972 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3973 3974 switch (mad_status) { 3975 case IBMVFC_MAD_SUCCESS: 3976 ibmvfc_free_event(evt); 3977 break; 3978 case IBMVFC_MAD_FAILED: 3979 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3980 level += ibmvfc_retry_host_init(vhost); 3981 else 3982 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3983 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 3984 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3985 ibmvfc_free_event(evt); 3986 return; 3987 case IBMVFC_MAD_CRQ_ERROR: 3988 ibmvfc_retry_host_init(vhost); 3989 case IBMVFC_MAD_DRIVER_FAILED: 3990 ibmvfc_free_event(evt); 3991 return; 3992 default: 3993 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 3994 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3995 ibmvfc_free_event(evt); 3996 return; 3997 } 3998 3999 vhost->client_migrated = 0; 4000 4001 if (!(rsp->flags & IBMVFC_NATIVE_FC)) { 4002 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 4003 rsp->flags); 4004 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4005 wake_up(&vhost->work_wait_q); 4006 return; 4007 } 4008 4009 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { 4010 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 4011 rsp->max_cmds); 4012 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4013 wake_up(&vhost->work_wait_q); 4014 return; 4015 } 4016 4017 vhost->logged_in = 1; 4018 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); 4019 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 4020 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 4021 rsp->drc_name, npiv_max_sectors); 4022 4023 fc_host_fabric_name(vhost->host) = rsp->node_name; 4024 fc_host_node_name(vhost->host) = rsp->node_name; 4025 fc_host_port_name(vhost->host) = rsp->port_name; 4026 fc_host_port_id(vhost->host) = rsp->scsi_id; 4027 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 4028 fc_host_supported_classes(vhost->host) = 0; 4029 if (rsp->service_parms.class1_parms[0] & 0x80000000) 4030 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 4031 if (rsp->service_parms.class2_parms[0] & 0x80000000) 4032 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 4033 if (rsp->service_parms.class3_parms[0] & 0x80000000) 4034 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 4035 fc_host_maxframe_size(vhost->host) = 4036 rsp->service_parms.common.bb_rcv_sz & 0x0fff; 4037 4038 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; 4039 vhost->host->max_sectors = npiv_max_sectors; 4040 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4041 wake_up(&vhost->work_wait_q); 4042} 4043 4044/** 4045 * ibmvfc_npiv_login - Sends NPIV login 4046 * @vhost: ibmvfc host struct 4047 * 4048 **/ 4049static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 4050{ 4051 struct ibmvfc_npiv_login_mad *mad; 4052 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4053 4054 ibmvfc_gather_partition_info(vhost); 4055 ibmvfc_set_login_info(vhost); 4056 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 4057 4058 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 4059 mad = &evt->iu.npiv_login; 4060 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 4061 mad->common.version = 1; 4062 mad->common.opcode = IBMVFC_NPIV_LOGIN; 4063 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); 4064 mad->buffer.va = vhost->login_buf_dma; 4065 mad->buffer.len = sizeof(*vhost->login_buf); 4066 4067 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4068 4069 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4070 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 4071 else 4072 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4073}; 4074 4075/** 4076 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 4077 * @vhost: ibmvfc host struct 4078 * 4079 **/ 4080static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 4081{ 4082 struct ibmvfc_host *vhost = evt->vhost; 4083 u32 mad_status = evt->xfer_iu->npiv_logout.common.status; 4084 4085 ibmvfc_free_event(evt); 4086 4087 switch (mad_status) { 4088 case IBMVFC_MAD_SUCCESS: 4089 if (list_empty(&vhost->sent) && 4090 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 4091 ibmvfc_init_host(vhost); 4092 return; 4093 } 4094 break; 4095 case IBMVFC_MAD_FAILED: 4096 case IBMVFC_MAD_NOT_SUPPORTED: 4097 case IBMVFC_MAD_CRQ_ERROR: 4098 case IBMVFC_MAD_DRIVER_FAILED: 4099 default: 4100 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 4101 break; 4102 } 4103 4104 ibmvfc_hard_reset_host(vhost); 4105} 4106 4107/** 4108 * ibmvfc_npiv_logout - Issue an NPIV Logout 4109 * @vhost: ibmvfc host struct 4110 * 4111 **/ 4112static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 4113{ 4114 struct ibmvfc_npiv_logout_mad *mad; 4115 struct ibmvfc_event *evt; 4116 4117 evt = ibmvfc_get_event(vhost); 4118 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 4119 4120 mad = &evt->iu.npiv_logout; 4121 memset(mad, 0, sizeof(*mad)); 4122 mad->common.version = 1; 4123 mad->common.opcode = IBMVFC_NPIV_LOGOUT; 4124 mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad); 4125 4126 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 4127 4128 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4129 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 4130 else 4131 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4132} 4133 4134/** 4135 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 4136 * @vhost: ibmvfc host struct 4137 * 4138 * Returns: 4139 * 1 if work to do / 0 if not 4140 **/ 4141static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 4142{ 4143 struct ibmvfc_target *tgt; 4144 4145 list_for_each_entry(tgt, &vhost->targets, queue) { 4146 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 4147 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4148 return 1; 4149 } 4150 4151 return 0; 4152} 4153 4154/** 4155 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 4156 * @vhost: ibmvfc host struct 4157 * 4158 * Returns: 4159 * 1 if work to do / 0 if not 4160 **/ 4161static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4162{ 4163 struct ibmvfc_target *tgt; 4164 4165 if (kthread_should_stop()) 4166 return 1; 4167 switch (vhost->action) { 4168 case IBMVFC_HOST_ACTION_NONE: 4169 case IBMVFC_HOST_ACTION_INIT_WAIT: 4170 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4171 return 0; 4172 case IBMVFC_HOST_ACTION_TGT_INIT: 4173 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4174 if (vhost->discovery_threads == disc_threads) 4175 return 0; 4176 list_for_each_entry(tgt, &vhost->targets, queue) 4177 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 4178 return 1; 4179 list_for_each_entry(tgt, &vhost->targets, queue) 4180 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4181 return 0; 4182 return 1; 4183 case IBMVFC_HOST_ACTION_LOGO: 4184 case IBMVFC_HOST_ACTION_INIT: 4185 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4186 case IBMVFC_HOST_ACTION_TGT_DEL: 4187 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4188 case IBMVFC_HOST_ACTION_QUERY: 4189 case IBMVFC_HOST_ACTION_RESET: 4190 case IBMVFC_HOST_ACTION_REENABLE: 4191 default: 4192 break; 4193 }; 4194 4195 return 1; 4196} 4197 4198/** 4199 * ibmvfc_work_to_do - Is there task level work to do? 4200 * @vhost: ibmvfc host struct 4201 * 4202 * Returns: 4203 * 1 if work to do / 0 if not 4204 **/ 4205static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4206{ 4207 unsigned long flags; 4208 int rc; 4209 4210 spin_lock_irqsave(vhost->host->host_lock, flags); 4211 rc = __ibmvfc_work_to_do(vhost); 4212 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4213 return rc; 4214} 4215 4216/** 4217 * ibmvfc_log_ae - Log async events if necessary 4218 * @vhost: ibmvfc host struct 4219 * @events: events to log 4220 * 4221 **/ 4222static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 4223{ 4224 if (events & IBMVFC_AE_RSCN) 4225 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 4226 if ((events & IBMVFC_AE_LINKDOWN) && 4227 vhost->state >= IBMVFC_HALTED) 4228 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 4229 if ((events & IBMVFC_AE_LINKUP) && 4230 vhost->state == IBMVFC_INITIALIZING) 4231 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 4232} 4233 4234/** 4235 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 4236 * @tgt: ibmvfc target struct 4237 * 4238 **/ 4239static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 4240{ 4241 struct ibmvfc_host *vhost = tgt->vhost; 4242 struct fc_rport *rport; 4243 unsigned long flags; 4244 4245 tgt_dbg(tgt, "Adding rport\n"); 4246 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 4247 spin_lock_irqsave(vhost->host->host_lock, flags); 4248 4249 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4250 tgt_dbg(tgt, "Deleting rport\n"); 4251 list_del(&tgt->queue); 4252 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4253 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4254 fc_remote_port_delete(rport); 4255 del_timer_sync(&tgt->timer); 4256 kref_put(&tgt->kref, ibmvfc_release_tgt); 4257 return; 4258 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 4259 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4260 return; 4261 } 4262 4263 if (rport) { 4264 tgt_dbg(tgt, "rport add succeeded\n"); 4265 tgt->rport = rport; 4266 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; 4267 rport->supported_classes = 0; 4268 tgt->target_id = rport->scsi_target_id; 4269 if (tgt->service_parms.class1_parms[0] & 0x80000000) 4270 rport->supported_classes |= FC_COS_CLASS1; 4271 if (tgt->service_parms.class2_parms[0] & 0x80000000) 4272 rport->supported_classes |= FC_COS_CLASS2; 4273 if (tgt->service_parms.class3_parms[0] & 0x80000000) 4274 rport->supported_classes |= FC_COS_CLASS3; 4275 if (rport->rqst_q) 4276 blk_queue_max_segments(rport->rqst_q, 1); 4277 } else 4278 tgt_dbg(tgt, "rport add failed\n"); 4279 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4280} 4281 4282/** 4283 * ibmvfc_do_work - Do task level work 4284 * @vhost: ibmvfc host struct 4285 * 4286 **/ 4287static void ibmvfc_do_work(struct ibmvfc_host *vhost) 4288{ 4289 struct ibmvfc_target *tgt; 4290 unsigned long flags; 4291 struct fc_rport *rport; 4292 int rc; 4293 4294 ibmvfc_log_ae(vhost, vhost->events_to_log); 4295 spin_lock_irqsave(vhost->host->host_lock, flags); 4296 vhost->events_to_log = 0; 4297 switch (vhost->action) { 4298 case IBMVFC_HOST_ACTION_NONE: 4299 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4300 case IBMVFC_HOST_ACTION_INIT_WAIT: 4301 break; 4302 case IBMVFC_HOST_ACTION_RESET: 4303 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4304 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4305 rc = ibmvfc_reset_crq(vhost); 4306 spin_lock_irqsave(vhost->host->host_lock, flags); 4307 if (rc == H_CLOSED) 4308 vio_enable_interrupts(to_vio_dev(vhost->dev)); 4309 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 4310 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 4311 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4312 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 4313 } 4314 break; 4315 case IBMVFC_HOST_ACTION_REENABLE: 4316 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4317 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4318 rc = ibmvfc_reenable_crq_queue(vhost); 4319 spin_lock_irqsave(vhost->host->host_lock, flags); 4320 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 4321 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4322 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 4323 } 4324 break; 4325 case IBMVFC_HOST_ACTION_LOGO: 4326 vhost->job_step(vhost); 4327 break; 4328 case IBMVFC_HOST_ACTION_INIT: 4329 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 4330 if (vhost->delay_init) { 4331 vhost->delay_init = 0; 4332 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4333 ssleep(15); 4334 return; 4335 } else 4336 vhost->job_step(vhost); 4337 break; 4338 case IBMVFC_HOST_ACTION_QUERY: 4339 list_for_each_entry(tgt, &vhost->targets, queue) 4340 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 4341 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 4342 break; 4343 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4344 list_for_each_entry(tgt, &vhost->targets, queue) { 4345 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4346 tgt->job_step(tgt); 4347 break; 4348 } 4349 } 4350 4351 if (!ibmvfc_dev_init_to_do(vhost)) 4352 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 4353 break; 4354 case IBMVFC_HOST_ACTION_TGT_DEL: 4355 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4356 list_for_each_entry(tgt, &vhost->targets, queue) { 4357 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4358 tgt_dbg(tgt, "Deleting rport\n"); 4359 rport = tgt->rport; 4360 tgt->rport = NULL; 4361 list_del(&tgt->queue); 4362 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4363 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4364 if (rport) 4365 fc_remote_port_delete(rport); 4366 del_timer_sync(&tgt->timer); 4367 kref_put(&tgt->kref, ibmvfc_release_tgt); 4368 return; 4369 } 4370 } 4371 4372 if (vhost->state == IBMVFC_INITIALIZING) { 4373 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 4374 if (vhost->reinit) { 4375 vhost->reinit = 0; 4376 scsi_block_requests(vhost->host); 4377 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4378 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4379 } else { 4380 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 4381 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4382 wake_up(&vhost->init_wait_q); 4383 schedule_work(&vhost->rport_add_work_q); 4384 vhost->init_retries = 0; 4385 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4386 scsi_unblock_requests(vhost->host); 4387 } 4388 4389 return; 4390 } else { 4391 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 4392 vhost->job_step = ibmvfc_discover_targets; 4393 } 4394 } else { 4395 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4396 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4397 scsi_unblock_requests(vhost->host); 4398 wake_up(&vhost->init_wait_q); 4399 return; 4400 } 4401 break; 4402 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4403 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4404 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4405 ibmvfc_alloc_targets(vhost); 4406 spin_lock_irqsave(vhost->host->host_lock, flags); 4407 break; 4408 case IBMVFC_HOST_ACTION_TGT_INIT: 4409 list_for_each_entry(tgt, &vhost->targets, queue) { 4410 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4411 tgt->job_step(tgt); 4412 break; 4413 } 4414 } 4415 4416 if (!ibmvfc_dev_init_to_do(vhost)) 4417 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4418 break; 4419 default: 4420 break; 4421 }; 4422 4423 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4424} 4425 4426/** 4427 * ibmvfc_work - Do task level work 4428 * @data: ibmvfc host struct 4429 * 4430 * Returns: 4431 * zero 4432 **/ 4433static int ibmvfc_work(void *data) 4434{ 4435 struct ibmvfc_host *vhost = data; 4436 int rc; 4437 4438 set_user_nice(current, -20); 4439 4440 while (1) { 4441 rc = wait_event_interruptible(vhost->work_wait_q, 4442 ibmvfc_work_to_do(vhost)); 4443 4444 BUG_ON(rc); 4445 4446 if (kthread_should_stop()) 4447 break; 4448 4449 ibmvfc_do_work(vhost); 4450 } 4451 4452 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4453 return 0; 4454} 4455 4456/** 4457 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4458 * @vhost: ibmvfc host struct 4459 * 4460 * Allocates a page for messages, maps it for dma, and registers 4461 * the crq with the hypervisor. 4462 * 4463 * Return value: 4464 * zero on success / other on failure 4465 **/ 4466static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4467{ 4468 int rc, retrc = -ENOMEM; 4469 struct device *dev = vhost->dev; 4470 struct vio_dev *vdev = to_vio_dev(dev); 4471 struct ibmvfc_crq_queue *crq = &vhost->crq; 4472 4473 ENTER; 4474 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4475 4476 if (!crq->msgs) 4477 return -ENOMEM; 4478 4479 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4480 crq->msg_token = dma_map_single(dev, crq->msgs, 4481 PAGE_SIZE, DMA_BIDIRECTIONAL); 4482 4483 if (dma_mapping_error(dev, crq->msg_token)) 4484 goto map_failed; 4485 4486 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4487 crq->msg_token, PAGE_SIZE); 4488 4489 if (rc == H_RESOURCE) 4490 /* maybe kexecing and resource is busy. try a reset */ 4491 retrc = rc = ibmvfc_reset_crq(vhost); 4492 4493 if (rc == H_CLOSED) 4494 dev_warn(dev, "Partner adapter not ready\n"); 4495 else if (rc) { 4496 dev_warn(dev, "Error %d opening adapter\n", rc); 4497 goto reg_crq_failed; 4498 } 4499 4500 retrc = 0; 4501 4502 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4503 4504 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4505 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4506 goto req_irq_failed; 4507 } 4508 4509 if ((rc = vio_enable_interrupts(vdev))) { 4510 dev_err(dev, "Error %d enabling interrupts\n", rc); 4511 goto req_irq_failed; 4512 } 4513 4514 crq->cur = 0; 4515 LEAVE; 4516 return retrc; 4517 4518req_irq_failed: 4519 tasklet_kill(&vhost->tasklet); 4520 do { 4521 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4522 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4523reg_crq_failed: 4524 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4525map_failed: 4526 free_page((unsigned long)crq->msgs); 4527 return retrc; 4528} 4529 4530/** 4531 * ibmvfc_free_mem - Free memory for vhost 4532 * @vhost: ibmvfc host struct 4533 * 4534 * Return value: 4535 * none 4536 **/ 4537static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4538{ 4539 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4540 4541 ENTER; 4542 mempool_destroy(vhost->tgt_pool); 4543 kfree(vhost->trace); 4544 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4545 vhost->disc_buf_dma); 4546 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4547 vhost->login_buf, vhost->login_buf_dma); 4548 dma_pool_destroy(vhost->sg_pool); 4549 dma_unmap_single(vhost->dev, async_q->msg_token, 4550 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4551 free_page((unsigned long)async_q->msgs); 4552 LEAVE; 4553} 4554 4555/** 4556 * ibmvfc_alloc_mem - Allocate memory for vhost 4557 * @vhost: ibmvfc host struct 4558 * 4559 * Return value: 4560 * 0 on success / non-zero on failure 4561 **/ 4562static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4563{ 4564 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4565 struct device *dev = vhost->dev; 4566 4567 ENTER; 4568 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4569 if (!async_q->msgs) { 4570 dev_err(dev, "Couldn't allocate async queue.\n"); 4571 goto nomem; 4572 } 4573 4574 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4575 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4576 async_q->size * sizeof(*async_q->msgs), 4577 DMA_BIDIRECTIONAL); 4578 4579 if (dma_mapping_error(dev, async_q->msg_token)) { 4580 dev_err(dev, "Failed to map async queue\n"); 4581 goto free_async_crq; 4582 } 4583 4584 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4585 SG_ALL * sizeof(struct srp_direct_buf), 4586 sizeof(struct srp_direct_buf), 0); 4587 4588 if (!vhost->sg_pool) { 4589 dev_err(dev, "Failed to allocate sg pool\n"); 4590 goto unmap_async_crq; 4591 } 4592 4593 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4594 &vhost->login_buf_dma, GFP_KERNEL); 4595 4596 if (!vhost->login_buf) { 4597 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4598 goto free_sg_pool; 4599 } 4600 4601 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4602 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4603 &vhost->disc_buf_dma, GFP_KERNEL); 4604 4605 if (!vhost->disc_buf) { 4606 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4607 goto free_login_buffer; 4608 } 4609 4610 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4611 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4612 4613 if (!vhost->trace) 4614 goto free_disc_buffer; 4615 4616 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4617 sizeof(struct ibmvfc_target)); 4618 4619 if (!vhost->tgt_pool) { 4620 dev_err(dev, "Couldn't allocate target memory pool\n"); 4621 goto free_trace; 4622 } 4623 4624 LEAVE; 4625 return 0; 4626 4627free_trace: 4628 kfree(vhost->trace); 4629free_disc_buffer: 4630 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4631 vhost->disc_buf_dma); 4632free_login_buffer: 4633 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4634 vhost->login_buf, vhost->login_buf_dma); 4635free_sg_pool: 4636 dma_pool_destroy(vhost->sg_pool); 4637unmap_async_crq: 4638 dma_unmap_single(dev, async_q->msg_token, 4639 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4640free_async_crq: 4641 free_page((unsigned long)async_q->msgs); 4642nomem: 4643 LEAVE; 4644 return -ENOMEM; 4645} 4646 4647/** 4648 * ibmvfc_rport_add_thread - Worker thread for rport adds 4649 * @work: work struct 4650 * 4651 **/ 4652static void ibmvfc_rport_add_thread(struct work_struct *work) 4653{ 4654 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4655 rport_add_work_q); 4656 struct ibmvfc_target *tgt; 4657 struct fc_rport *rport; 4658 unsigned long flags; 4659 int did_work; 4660 4661 ENTER; 4662 spin_lock_irqsave(vhost->host->host_lock, flags); 4663 do { 4664 did_work = 0; 4665 if (vhost->state != IBMVFC_ACTIVE) 4666 break; 4667 4668 list_for_each_entry(tgt, &vhost->targets, queue) { 4669 if (tgt->add_rport) { 4670 did_work = 1; 4671 tgt->add_rport = 0; 4672 kref_get(&tgt->kref); 4673 rport = tgt->rport; 4674 if (!rport) { 4675 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4676 ibmvfc_tgt_add_rport(tgt); 4677 } else if (get_device(&rport->dev)) { 4678 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4679 tgt_dbg(tgt, "Setting rport roles\n"); 4680 fc_remote_port_rolechg(rport, tgt->ids.roles); 4681 put_device(&rport->dev); 4682 } 4683 4684 kref_put(&tgt->kref, ibmvfc_release_tgt); 4685 spin_lock_irqsave(vhost->host->host_lock, flags); 4686 break; 4687 } 4688 } 4689 } while(did_work); 4690 4691 if (vhost->state == IBMVFC_ACTIVE) 4692 vhost->scan_complete = 1; 4693 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4694 LEAVE; 4695} 4696 4697/** 4698 * ibmvfc_probe - Adapter hot plug add entry point 4699 * @vdev: vio device struct 4700 * @id: vio device id struct 4701 * 4702 * Return value: 4703 * 0 on success / non-zero on failure 4704 **/ 4705static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4706{ 4707 struct ibmvfc_host *vhost; 4708 struct Scsi_Host *shost; 4709 struct device *dev = &vdev->dev; 4710 int rc = -ENOMEM; 4711 4712 ENTER; 4713 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4714 if (!shost) { 4715 dev_err(dev, "Couldn't allocate host data\n"); 4716 goto out; 4717 } 4718 4719 shost->transportt = ibmvfc_transport_template; 4720 shost->can_queue = max_requests; 4721 shost->max_lun = max_lun; 4722 shost->max_id = max_targets; 4723 shost->max_sectors = IBMVFC_MAX_SECTORS; 4724 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4725 shost->unique_id = shost->host_no; 4726 4727 vhost = shost_priv(shost); 4728 INIT_LIST_HEAD(&vhost->sent); 4729 INIT_LIST_HEAD(&vhost->free); 4730 INIT_LIST_HEAD(&vhost->targets); 4731 sprintf(vhost->name, IBMVFC_NAME); 4732 vhost->host = shost; 4733 vhost->dev = dev; 4734 vhost->partition_number = -1; 4735 vhost->log_level = log_level; 4736 vhost->task_set = 1; 4737 strcpy(vhost->partition_name, "UNKNOWN"); 4738 init_waitqueue_head(&vhost->work_wait_q); 4739 init_waitqueue_head(&vhost->init_wait_q); 4740 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4741 mutex_init(&vhost->passthru_mutex); 4742 4743 if ((rc = ibmvfc_alloc_mem(vhost))) 4744 goto free_scsi_host; 4745 4746 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4747 shost->host_no); 4748 4749 if (IS_ERR(vhost->work_thread)) { 4750 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4751 PTR_ERR(vhost->work_thread)); 4752 goto free_host_mem; 4753 } 4754 4755 if ((rc = ibmvfc_init_crq(vhost))) { 4756 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4757 goto kill_kthread; 4758 } 4759 4760 if ((rc = ibmvfc_init_event_pool(vhost))) { 4761 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4762 goto release_crq; 4763 } 4764 4765 if ((rc = scsi_add_host(shost, dev))) 4766 goto release_event_pool; 4767 4768 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 4769 4770 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4771 &ibmvfc_trace_attr))) { 4772 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4773 goto remove_shost; 4774 } 4775 4776 if (shost_to_fc_host(shost)->rqst_q) 4777 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 4778 dev_set_drvdata(dev, vhost); 4779 spin_lock(&ibmvfc_driver_lock); 4780 list_add_tail(&vhost->queue, &ibmvfc_head); 4781 spin_unlock(&ibmvfc_driver_lock); 4782 4783 ibmvfc_send_crq_init(vhost); 4784 scsi_scan_host(shost); 4785 return 0; 4786 4787remove_shost: 4788 scsi_remove_host(shost); 4789release_event_pool: 4790 ibmvfc_free_event_pool(vhost); 4791release_crq: 4792 ibmvfc_release_crq_queue(vhost); 4793kill_kthread: 4794 kthread_stop(vhost->work_thread); 4795free_host_mem: 4796 ibmvfc_free_mem(vhost); 4797free_scsi_host: 4798 scsi_host_put(shost); 4799out: 4800 LEAVE; 4801 return rc; 4802} 4803 4804/** 4805 * ibmvfc_remove - Adapter hot plug remove entry point 4806 * @vdev: vio device struct 4807 * 4808 * Return value: 4809 * 0 4810 **/ 4811static int ibmvfc_remove(struct vio_dev *vdev) 4812{ 4813 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4814 unsigned long flags; 4815 4816 ENTER; 4817 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4818 4819 spin_lock_irqsave(vhost->host->host_lock, flags); 4820 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4821 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4822 4823 ibmvfc_wait_while_resetting(vhost); 4824 ibmvfc_release_crq_queue(vhost); 4825 kthread_stop(vhost->work_thread); 4826 fc_remove_host(vhost->host); 4827 scsi_remove_host(vhost->host); 4828 4829 spin_lock_irqsave(vhost->host->host_lock, flags); 4830 ibmvfc_purge_requests(vhost, DID_ERROR); 4831 ibmvfc_free_event_pool(vhost); 4832 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4833 4834 ibmvfc_free_mem(vhost); 4835 spin_lock(&ibmvfc_driver_lock); 4836 list_del(&vhost->queue); 4837 spin_unlock(&ibmvfc_driver_lock); 4838 scsi_host_put(vhost->host); 4839 LEAVE; 4840 return 0; 4841} 4842 4843/** 4844 * ibmvfc_resume - Resume from suspend 4845 * @dev: device struct 4846 * 4847 * We may have lost an interrupt across suspend/resume, so kick the 4848 * interrupt handler 4849 * 4850 */ 4851static int ibmvfc_resume(struct device *dev) 4852{ 4853 unsigned long flags; 4854 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 4855 struct vio_dev *vdev = to_vio_dev(dev); 4856 4857 spin_lock_irqsave(vhost->host->host_lock, flags); 4858 vio_disable_interrupts(vdev); 4859 tasklet_schedule(&vhost->tasklet); 4860 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4861 return 0; 4862} 4863 4864/** 4865 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4866 * @vdev: vio device struct 4867 * 4868 * Return value: 4869 * Number of bytes the driver will need to DMA map at the same time in 4870 * order to perform well. 4871 */ 4872static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4873{ 4874 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4875 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4876} 4877 4878static struct vio_device_id ibmvfc_device_table[] __devinitdata = { 4879 {"fcp", "IBM,vfc-client"}, 4880 { "", "" } 4881}; 4882MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4883 4884static struct dev_pm_ops ibmvfc_pm_ops = { 4885 .resume = ibmvfc_resume 4886}; 4887 4888static struct vio_driver ibmvfc_driver = { 4889 .id_table = ibmvfc_device_table, 4890 .probe = ibmvfc_probe, 4891 .remove = ibmvfc_remove, 4892 .get_desired_dma = ibmvfc_get_desired_dma, 4893 .name = IBMVFC_NAME, 4894 .pm = &ibmvfc_pm_ops, 4895}; 4896 4897static struct fc_function_template ibmvfc_transport_functions = { 4898 .show_host_fabric_name = 1, 4899 .show_host_node_name = 1, 4900 .show_host_port_name = 1, 4901 .show_host_supported_classes = 1, 4902 .show_host_port_type = 1, 4903 .show_host_port_id = 1, 4904 .show_host_maxframe_size = 1, 4905 4906 .get_host_port_state = ibmvfc_get_host_port_state, 4907 .show_host_port_state = 1, 4908 4909 .get_host_speed = ibmvfc_get_host_speed, 4910 .show_host_speed = 1, 4911 4912 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4913 .terminate_rport_io = ibmvfc_terminate_rport_io, 4914 4915 .show_rport_maxframe_size = 1, 4916 .show_rport_supported_classes = 1, 4917 4918 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4919 .show_rport_dev_loss_tmo = 1, 4920 4921 .get_starget_node_name = ibmvfc_get_starget_node_name, 4922 .show_starget_node_name = 1, 4923 4924 .get_starget_port_name = ibmvfc_get_starget_port_name, 4925 .show_starget_port_name = 1, 4926 4927 .get_starget_port_id = ibmvfc_get_starget_port_id, 4928 .show_starget_port_id = 1, 4929 4930 .bsg_request = ibmvfc_bsg_request, 4931 .bsg_timeout = ibmvfc_bsg_timeout, 4932}; 4933 4934/** 4935 * ibmvfc_module_init - Initialize the ibmvfc module 4936 * 4937 * Return value: 4938 * 0 on success / other on failure 4939 **/ 4940static int __init ibmvfc_module_init(void) 4941{ 4942 int rc; 4943 4944 if (!firmware_has_feature(FW_FEATURE_VIO)) 4945 return -ENODEV; 4946 4947 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4948 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4949 4950 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4951 if (!ibmvfc_transport_template) 4952 return -ENOMEM; 4953 4954 rc = vio_register_driver(&ibmvfc_driver); 4955 if (rc) 4956 fc_release_transport(ibmvfc_transport_template); 4957 return rc; 4958} 4959 4960/** 4961 * ibmvfc_module_exit - Teardown the ibmvfc module 4962 * 4963 * Return value: 4964 * nothing 4965 **/ 4966static void __exit ibmvfc_module_exit(void) 4967{ 4968 vio_unregister_driver(&ibmvfc_driver); 4969 fc_release_transport(ibmvfc_transport_template); 4970} 4971 4972module_init(ibmvfc_module_init); 4973module_exit(ibmvfc_module_exit); 4974