ibmvfc.c revision b0f4d4cf12d0eaa0bd766686bba843fc105b6a60
1/* 2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 3 * 4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 5 * 6 * Copyright (C) IBM Corporation, 2008 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24#include <linux/module.h> 25#include <linux/moduleparam.h> 26#include <linux/dma-mapping.h> 27#include <linux/dmapool.h> 28#include <linux/delay.h> 29#include <linux/interrupt.h> 30#include <linux/kthread.h> 31#include <linux/of.h> 32#include <linux/pm.h> 33#include <linux/stringify.h> 34#include <asm/firmware.h> 35#include <asm/irq.h> 36#include <asm/vio.h> 37#include <scsi/scsi.h> 38#include <scsi/scsi_cmnd.h> 39#include <scsi/scsi_host.h> 40#include <scsi/scsi_device.h> 41#include <scsi/scsi_tcq.h> 42#include <scsi/scsi_transport_fc.h> 43#include <scsi/scsi_bsg_fc.h> 44#include "ibmvfc.h" 45 46static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 47static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 48static unsigned int max_lun = IBMVFC_MAX_LUN; 49static unsigned int max_targets = IBMVFC_MAX_TARGETS; 50static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 51static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 52static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO; 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(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR); 87MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC " 88 "transport should insulate the loss of a remote port. Once this " 89 "value is exceeded, the scsi target is removed. " 90 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]"); 91module_param_named(log_level, log_level, uint, 0); 92MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 93 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 94 95static const struct { 96 u16 status; 97 u16 error; 98 u8 result; 99 u8 retry; 100 int log; 101 char *name; 102} cmd_status [] = { 103 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 104 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 105 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 106 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 107 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 108 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 109 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 110 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 111 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 112 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 115 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 116 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 117 118 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 119 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 120 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 121 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 122 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 123 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 124 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 125 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 126 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 127 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 128 129 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 131 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 132 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 133 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 134 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 135 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 136 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 137 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 138 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 139 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 140 141 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 142}; 143 144static void ibmvfc_npiv_login(struct ibmvfc_host *); 145static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 146static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 147static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 148static void ibmvfc_npiv_logout(struct ibmvfc_host *); 149 150static const char *unknown_error = "unknown error"; 151 152#ifdef CONFIG_SCSI_IBMVFC_TRACE 153/** 154 * ibmvfc_trc_start - Log a start trace entry 155 * @evt: ibmvfc event struct 156 * 157 **/ 158static void ibmvfc_trc_start(struct ibmvfc_event *evt) 159{ 160 struct ibmvfc_host *vhost = evt->vhost; 161 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 162 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 163 struct ibmvfc_trace_entry *entry; 164 165 entry = &vhost->trace[vhost->trace_index++]; 166 entry->evt = evt; 167 entry->time = jiffies; 168 entry->fmt = evt->crq.format; 169 entry->type = IBMVFC_TRC_START; 170 171 switch (entry->fmt) { 172 case IBMVFC_CMD_FORMAT: 173 entry->op_code = vfc_cmd->iu.cdb[0]; 174 entry->scsi_id = vfc_cmd->tgt_scsi_id; 175 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 176 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 177 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; 178 break; 179 case IBMVFC_MAD_FORMAT: 180 entry->op_code = mad->opcode; 181 break; 182 default: 183 break; 184 }; 185} 186 187/** 188 * ibmvfc_trc_end - Log an end trace entry 189 * @evt: ibmvfc event struct 190 * 191 **/ 192static void ibmvfc_trc_end(struct ibmvfc_event *evt) 193{ 194 struct ibmvfc_host *vhost = evt->vhost; 195 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 196 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 197 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; 198 199 entry->evt = evt; 200 entry->time = jiffies; 201 entry->fmt = evt->crq.format; 202 entry->type = IBMVFC_TRC_END; 203 204 switch (entry->fmt) { 205 case IBMVFC_CMD_FORMAT: 206 entry->op_code = vfc_cmd->iu.cdb[0]; 207 entry->scsi_id = vfc_cmd->tgt_scsi_id; 208 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 209 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 210 entry->u.end.status = vfc_cmd->status; 211 entry->u.end.error = vfc_cmd->error; 212 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; 213 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; 214 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; 215 break; 216 case IBMVFC_MAD_FORMAT: 217 entry->op_code = mad->opcode; 218 entry->u.end.status = mad->status; 219 break; 220 default: 221 break; 222 223 }; 224} 225 226#else 227#define ibmvfc_trc_start(evt) do { } while (0) 228#define ibmvfc_trc_end(evt) do { } while (0) 229#endif 230 231/** 232 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 233 * @status: status / error class 234 * @error: error 235 * 236 * Return value: 237 * index into cmd_status / -EINVAL on failure 238 **/ 239static int ibmvfc_get_err_index(u16 status, u16 error) 240{ 241 int i; 242 243 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 244 if ((cmd_status[i].status & status) == cmd_status[i].status && 245 cmd_status[i].error == error) 246 return i; 247 248 return -EINVAL; 249} 250 251/** 252 * ibmvfc_get_cmd_error - Find the error description for the fcp response 253 * @status: status / error class 254 * @error: error 255 * 256 * Return value: 257 * error description string 258 **/ 259static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 260{ 261 int rc = ibmvfc_get_err_index(status, error); 262 if (rc >= 0) 263 return cmd_status[rc].name; 264 return unknown_error; 265} 266 267/** 268 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 269 * @vfc_cmd: ibmvfc command struct 270 * 271 * Return value: 272 * SCSI result value to return for completed command 273 **/ 274static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) 275{ 276 int err; 277 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 278 int fc_rsp_len = rsp->fcp_rsp_len; 279 280 if ((rsp->flags & FCP_RSP_LEN_VALID) && 281 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 282 rsp->data.info.rsp_code)) 283 return DID_ERROR << 16; 284 285 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 286 if (err >= 0) 287 return rsp->scsi_status | (cmd_status[err].result << 16); 288 return rsp->scsi_status | (DID_ERROR << 16); 289} 290 291/** 292 * ibmvfc_retry_cmd - Determine if error status is retryable 293 * @status: status / error class 294 * @error: error 295 * 296 * Return value: 297 * 1 if error should be retried / 0 if it should not 298 **/ 299static int ibmvfc_retry_cmd(u16 status, u16 error) 300{ 301 int rc = ibmvfc_get_err_index(status, error); 302 303 if (rc >= 0) 304 return cmd_status[rc].retry; 305 return 1; 306} 307 308static const char *unknown_fc_explain = "unknown fc explain"; 309 310static const struct { 311 u16 fc_explain; 312 char *name; 313} ls_explain [] = { 314 { 0x00, "no additional explanation" }, 315 { 0x01, "service parameter error - options" }, 316 { 0x03, "service parameter error - initiator control" }, 317 { 0x05, "service parameter error - recipient control" }, 318 { 0x07, "service parameter error - received data field size" }, 319 { 0x09, "service parameter error - concurrent seq" }, 320 { 0x0B, "service parameter error - credit" }, 321 { 0x0D, "invalid N_Port/F_Port_Name" }, 322 { 0x0E, "invalid node/Fabric Name" }, 323 { 0x0F, "invalid common service parameters" }, 324 { 0x11, "invalid association header" }, 325 { 0x13, "association header required" }, 326 { 0x15, "invalid originator S_ID" }, 327 { 0x17, "invalid OX_ID-RX-ID combination" }, 328 { 0x19, "command (request) already in progress" }, 329 { 0x1E, "N_Port Login requested" }, 330 { 0x1F, "Invalid N_Port_ID" }, 331}; 332 333static const struct { 334 u16 fc_explain; 335 char *name; 336} gs_explain [] = { 337 { 0x00, "no additional explanation" }, 338 { 0x01, "port identifier not registered" }, 339 { 0x02, "port name not registered" }, 340 { 0x03, "node name not registered" }, 341 { 0x04, "class of service not registered" }, 342 { 0x06, "initial process associator not registered" }, 343 { 0x07, "FC-4 TYPEs not registered" }, 344 { 0x08, "symbolic port name not registered" }, 345 { 0x09, "symbolic node name not registered" }, 346 { 0x0A, "port type not registered" }, 347 { 0xF0, "authorization exception" }, 348 { 0xF1, "authentication exception" }, 349 { 0xF2, "data base full" }, 350 { 0xF3, "data base empty" }, 351 { 0xF4, "processing request" }, 352 { 0xF5, "unable to verify connection" }, 353 { 0xF6, "devices not in a common zone" }, 354}; 355 356/** 357 * ibmvfc_get_ls_explain - Return the FC Explain description text 358 * @status: FC Explain status 359 * 360 * Returns: 361 * error string 362 **/ 363static const char *ibmvfc_get_ls_explain(u16 status) 364{ 365 int i; 366 367 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 368 if (ls_explain[i].fc_explain == status) 369 return ls_explain[i].name; 370 371 return unknown_fc_explain; 372} 373 374/** 375 * ibmvfc_get_gs_explain - Return the FC Explain description text 376 * @status: FC Explain status 377 * 378 * Returns: 379 * error string 380 **/ 381static const char *ibmvfc_get_gs_explain(u16 status) 382{ 383 int i; 384 385 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 386 if (gs_explain[i].fc_explain == status) 387 return gs_explain[i].name; 388 389 return unknown_fc_explain; 390} 391 392static const struct { 393 enum ibmvfc_fc_type fc_type; 394 char *name; 395} fc_type [] = { 396 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 397 { IBMVFC_PORT_REJECT, "port reject" }, 398 { IBMVFC_LS_REJECT, "ELS reject" }, 399 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 400 { IBMVFC_PORT_BUSY, "port busy" }, 401 { IBMVFC_BASIC_REJECT, "basic reject" }, 402}; 403 404static const char *unknown_fc_type = "unknown fc type"; 405 406/** 407 * ibmvfc_get_fc_type - Return the FC Type description text 408 * @status: FC Type error status 409 * 410 * Returns: 411 * error string 412 **/ 413static const char *ibmvfc_get_fc_type(u16 status) 414{ 415 int i; 416 417 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 418 if (fc_type[i].fc_type == status) 419 return fc_type[i].name; 420 421 return unknown_fc_type; 422} 423 424/** 425 * ibmvfc_set_tgt_action - Set the next init action for the target 426 * @tgt: ibmvfc target struct 427 * @action: action to perform 428 * 429 **/ 430static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 431 enum ibmvfc_target_action action) 432{ 433 switch (tgt->action) { 434 case IBMVFC_TGT_ACTION_DEL_RPORT: 435 break; 436 default: 437 if (action == IBMVFC_TGT_ACTION_DEL_RPORT) 438 tgt->add_rport = 0; 439 tgt->action = action; 440 break; 441 } 442} 443 444/** 445 * ibmvfc_set_host_state - Set the state for the host 446 * @vhost: ibmvfc host struct 447 * @state: state to set host to 448 * 449 * Returns: 450 * 0 if state changed / non-zero if not changed 451 **/ 452static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 453 enum ibmvfc_host_state state) 454{ 455 int rc = 0; 456 457 switch (vhost->state) { 458 case IBMVFC_HOST_OFFLINE: 459 rc = -EINVAL; 460 break; 461 default: 462 vhost->state = state; 463 break; 464 }; 465 466 return rc; 467} 468 469/** 470 * ibmvfc_set_host_action - Set the next init action for the host 471 * @vhost: ibmvfc host struct 472 * @action: action to perform 473 * 474 **/ 475static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 476 enum ibmvfc_host_action action) 477{ 478 switch (action) { 479 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 480 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 481 vhost->action = action; 482 break; 483 case IBMVFC_HOST_ACTION_LOGO_WAIT: 484 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 485 vhost->action = action; 486 break; 487 case IBMVFC_HOST_ACTION_INIT_WAIT: 488 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 489 vhost->action = action; 490 break; 491 case IBMVFC_HOST_ACTION_QUERY: 492 switch (vhost->action) { 493 case IBMVFC_HOST_ACTION_INIT_WAIT: 494 case IBMVFC_HOST_ACTION_NONE: 495 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 496 vhost->action = action; 497 break; 498 default: 499 break; 500 }; 501 break; 502 case IBMVFC_HOST_ACTION_TGT_INIT: 503 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 504 vhost->action = action; 505 break; 506 case IBMVFC_HOST_ACTION_LOGO: 507 case IBMVFC_HOST_ACTION_INIT: 508 case IBMVFC_HOST_ACTION_TGT_DEL: 509 case IBMVFC_HOST_ACTION_QUERY_TGTS: 510 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 511 case IBMVFC_HOST_ACTION_NONE: 512 default: 513 vhost->action = action; 514 break; 515 }; 516} 517 518/** 519 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 520 * @vhost: ibmvfc host struct 521 * 522 * Return value: 523 * nothing 524 **/ 525static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 526{ 527 if (vhost->action == IBMVFC_HOST_ACTION_NONE) { 528 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 529 scsi_block_requests(vhost->host); 530 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 531 } 532 } else 533 vhost->reinit = 1; 534 535 wake_up(&vhost->work_wait_q); 536} 537 538/** 539 * ibmvfc_link_down - Handle a link down event from the adapter 540 * @vhost: ibmvfc host struct 541 * @state: ibmvfc host state to enter 542 * 543 **/ 544static void ibmvfc_link_down(struct ibmvfc_host *vhost, 545 enum ibmvfc_host_state state) 546{ 547 struct ibmvfc_target *tgt; 548 549 ENTER; 550 scsi_block_requests(vhost->host); 551 list_for_each_entry(tgt, &vhost->targets, queue) 552 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 553 ibmvfc_set_host_state(vhost, state); 554 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 555 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 556 wake_up(&vhost->work_wait_q); 557 LEAVE; 558} 559 560/** 561 * ibmvfc_init_host - Start host initialization 562 * @vhost: ibmvfc host struct 563 * 564 * Return value: 565 * nothing 566 **/ 567static void ibmvfc_init_host(struct ibmvfc_host *vhost) 568{ 569 struct ibmvfc_target *tgt; 570 571 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 572 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 573 dev_err(vhost->dev, 574 "Host initialization retries exceeded. Taking adapter offline\n"); 575 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 576 return; 577 } 578 } 579 580 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 581 memset(vhost->async_crq.msgs, 0, PAGE_SIZE); 582 vhost->async_crq.cur = 0; 583 584 list_for_each_entry(tgt, &vhost->targets, queue) 585 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 586 scsi_block_requests(vhost->host); 587 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 588 vhost->job_step = ibmvfc_npiv_login; 589 wake_up(&vhost->work_wait_q); 590 } 591} 592 593/** 594 * ibmvfc_send_crq - Send a CRQ 595 * @vhost: ibmvfc host struct 596 * @word1: the first 64 bits of the data 597 * @word2: the second 64 bits of the data 598 * 599 * Return value: 600 * 0 on success / other on failure 601 **/ 602static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 603{ 604 struct vio_dev *vdev = to_vio_dev(vhost->dev); 605 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 606} 607 608/** 609 * ibmvfc_send_crq_init - Send a CRQ init message 610 * @vhost: ibmvfc host struct 611 * 612 * Return value: 613 * 0 on success / other on failure 614 **/ 615static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 616{ 617 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 618 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 619} 620 621/** 622 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 623 * @vhost: ibmvfc host struct 624 * 625 * Return value: 626 * 0 on success / other on failure 627 **/ 628static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 629{ 630 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 631 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 632} 633 634/** 635 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 636 * @vhost: ibmvfc host struct 637 * 638 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 639 * the crq with the hypervisor. 640 **/ 641static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 642{ 643 long rc; 644 struct vio_dev *vdev = to_vio_dev(vhost->dev); 645 struct ibmvfc_crq_queue *crq = &vhost->crq; 646 647 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 648 free_irq(vdev->irq, vhost); 649 tasklet_kill(&vhost->tasklet); 650 do { 651 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 652 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 653 654 vhost->state = IBMVFC_NO_CRQ; 655 vhost->logged_in = 0; 656 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 657 free_page((unsigned long)crq->msgs); 658} 659 660/** 661 * ibmvfc_reenable_crq_queue - reenables the CRQ 662 * @vhost: ibmvfc host struct 663 * 664 * Return value: 665 * 0 on success / other on failure 666 **/ 667static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 668{ 669 int rc; 670 struct vio_dev *vdev = to_vio_dev(vhost->dev); 671 672 /* Re-enable the CRQ */ 673 do { 674 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 675 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 676 677 if (rc) 678 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 679 680 return rc; 681} 682 683/** 684 * ibmvfc_reset_crq - resets a crq after a failure 685 * @vhost: ibmvfc host struct 686 * 687 * Return value: 688 * 0 on success / other on failure 689 **/ 690static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 691{ 692 int rc; 693 struct vio_dev *vdev = to_vio_dev(vhost->dev); 694 struct ibmvfc_crq_queue *crq = &vhost->crq; 695 696 /* Close the CRQ */ 697 do { 698 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 699 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 700 701 vhost->state = IBMVFC_NO_CRQ; 702 vhost->logged_in = 0; 703 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 704 705 /* Clean out the queue */ 706 memset(crq->msgs, 0, PAGE_SIZE); 707 crq->cur = 0; 708 709 /* And re-open it again */ 710 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 711 crq->msg_token, PAGE_SIZE); 712 713 if (rc == H_CLOSED) 714 /* Adapter is good, but other end is not ready */ 715 dev_warn(vhost->dev, "Partner adapter not ready\n"); 716 else if (rc != 0) 717 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 718 719 return rc; 720} 721 722/** 723 * ibmvfc_valid_event - Determines if event is valid. 724 * @pool: event_pool that contains the event 725 * @evt: ibmvfc event to be checked for validity 726 * 727 * Return value: 728 * 1 if event is valid / 0 if event is not valid 729 **/ 730static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 731 struct ibmvfc_event *evt) 732{ 733 int index = evt - pool->events; 734 if (index < 0 || index >= pool->size) /* outside of bounds */ 735 return 0; 736 if (evt != pool->events + index) /* unaligned */ 737 return 0; 738 return 1; 739} 740 741/** 742 * ibmvfc_free_event - Free the specified event 743 * @evt: ibmvfc_event to be freed 744 * 745 **/ 746static void ibmvfc_free_event(struct ibmvfc_event *evt) 747{ 748 struct ibmvfc_host *vhost = evt->vhost; 749 struct ibmvfc_event_pool *pool = &vhost->pool; 750 751 BUG_ON(!ibmvfc_valid_event(pool, evt)); 752 BUG_ON(atomic_inc_return(&evt->free) != 1); 753 list_add_tail(&evt->queue, &vhost->free); 754} 755 756/** 757 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 758 * @evt: ibmvfc event struct 759 * 760 * This function does not setup any error status, that must be done 761 * before this function gets called. 762 **/ 763static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 764{ 765 struct scsi_cmnd *cmnd = evt->cmnd; 766 767 if (cmnd) { 768 scsi_dma_unmap(cmnd); 769 cmnd->scsi_done(cmnd); 770 } 771 772 if (evt->eh_comp) 773 complete(evt->eh_comp); 774 775 ibmvfc_free_event(evt); 776} 777 778/** 779 * ibmvfc_fail_request - Fail request with specified error code 780 * @evt: ibmvfc event struct 781 * @error_code: error code to fail request with 782 * 783 * Return value: 784 * none 785 **/ 786static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 787{ 788 if (evt->cmnd) { 789 evt->cmnd->result = (error_code << 16); 790 evt->done = ibmvfc_scsi_eh_done; 791 } else 792 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; 793 794 list_del(&evt->queue); 795 del_timer(&evt->timer); 796 ibmvfc_trc_end(evt); 797 evt->done(evt); 798} 799 800/** 801 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 802 * @vhost: ibmvfc host struct 803 * @error_code: error code to fail requests with 804 * 805 * Return value: 806 * none 807 **/ 808static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 809{ 810 struct ibmvfc_event *evt, *pos; 811 812 ibmvfc_dbg(vhost, "Purging all requests\n"); 813 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 814 ibmvfc_fail_request(evt, error_code); 815} 816 817/** 818 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 819 * @vhost: struct ibmvfc host to reset 820 **/ 821static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 822{ 823 int rc; 824 825 scsi_block_requests(vhost->host); 826 ibmvfc_purge_requests(vhost, DID_ERROR); 827 if ((rc = ibmvfc_reset_crq(vhost)) || 828 (rc = ibmvfc_send_crq_init(vhost)) || 829 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 830 dev_err(vhost->dev, "Error after reset rc=%d\n", rc); 831 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 832 } else 833 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 834} 835 836/** 837 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 838 * @vhost: struct ibmvfc host to reset 839 **/ 840static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 841{ 842 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 843 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 844 scsi_block_requests(vhost->host); 845 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 846 vhost->job_step = ibmvfc_npiv_logout; 847 wake_up(&vhost->work_wait_q); 848 } else 849 ibmvfc_hard_reset_host(vhost); 850} 851 852/** 853 * ibmvfc_reset_host - Reset the connection to the server 854 * @vhost: ibmvfc host struct 855 **/ 856static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 857{ 858 unsigned long flags; 859 860 spin_lock_irqsave(vhost->host->host_lock, flags); 861 __ibmvfc_reset_host(vhost); 862 spin_unlock_irqrestore(vhost->host->host_lock, flags); 863} 864 865/** 866 * ibmvfc_retry_host_init - Retry host initialization if allowed 867 * @vhost: ibmvfc host struct 868 * 869 * Returns: 1 if init will be retried / 0 if not 870 * 871 **/ 872static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 873{ 874 int retry = 0; 875 876 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 877 vhost->delay_init = 1; 878 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 879 dev_err(vhost->dev, 880 "Host initialization retries exceeded. Taking adapter offline\n"); 881 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 882 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 883 __ibmvfc_reset_host(vhost); 884 else { 885 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 886 retry = 1; 887 } 888 } 889 890 wake_up(&vhost->work_wait_q); 891 return retry; 892} 893 894/** 895 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 896 * @starget: scsi target struct 897 * 898 * Return value: 899 * ibmvfc_target struct / NULL if not found 900 **/ 901static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 902{ 903 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 904 struct ibmvfc_host *vhost = shost_priv(shost); 905 struct ibmvfc_target *tgt; 906 907 list_for_each_entry(tgt, &vhost->targets, queue) 908 if (tgt->target_id == starget->id) { 909 kref_get(&tgt->kref); 910 return tgt; 911 } 912 return NULL; 913} 914 915/** 916 * ibmvfc_get_target - Find the specified scsi_target 917 * @starget: scsi target struct 918 * 919 * Return value: 920 * ibmvfc_target struct / NULL if not found 921 **/ 922static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 923{ 924 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 925 struct ibmvfc_target *tgt; 926 unsigned long flags; 927 928 spin_lock_irqsave(shost->host_lock, flags); 929 tgt = __ibmvfc_get_target(starget); 930 spin_unlock_irqrestore(shost->host_lock, flags); 931 return tgt; 932} 933 934/** 935 * ibmvfc_get_host_speed - Get host port speed 936 * @shost: scsi host struct 937 * 938 * Return value: 939 * none 940 **/ 941static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 942{ 943 struct ibmvfc_host *vhost = shost_priv(shost); 944 unsigned long flags; 945 946 spin_lock_irqsave(shost->host_lock, flags); 947 if (vhost->state == IBMVFC_ACTIVE) { 948 switch (vhost->login_buf->resp.link_speed / 100) { 949 case 1: 950 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 951 break; 952 case 2: 953 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 954 break; 955 case 4: 956 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 957 break; 958 case 8: 959 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 960 break; 961 case 10: 962 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 963 break; 964 case 16: 965 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 966 break; 967 default: 968 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 969 vhost->login_buf->resp.link_speed / 100); 970 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 971 break; 972 } 973 } else 974 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 975 spin_unlock_irqrestore(shost->host_lock, flags); 976} 977 978/** 979 * ibmvfc_get_host_port_state - Get host port state 980 * @shost: scsi host struct 981 * 982 * Return value: 983 * none 984 **/ 985static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 986{ 987 struct ibmvfc_host *vhost = shost_priv(shost); 988 unsigned long flags; 989 990 spin_lock_irqsave(shost->host_lock, flags); 991 switch (vhost->state) { 992 case IBMVFC_INITIALIZING: 993 case IBMVFC_ACTIVE: 994 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 995 break; 996 case IBMVFC_LINK_DOWN: 997 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 998 break; 999 case IBMVFC_LINK_DEAD: 1000 case IBMVFC_HOST_OFFLINE: 1001 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1002 break; 1003 case IBMVFC_HALTED: 1004 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1005 break; 1006 case IBMVFC_NO_CRQ: 1007 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1008 break; 1009 default: 1010 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1011 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1012 break; 1013 } 1014 spin_unlock_irqrestore(shost->host_lock, flags); 1015} 1016 1017/** 1018 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1019 * @rport: rport struct 1020 * @timeout: timeout value 1021 * 1022 * Return value: 1023 * none 1024 **/ 1025static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1026{ 1027 if (timeout) 1028 rport->dev_loss_tmo = timeout; 1029 else 1030 rport->dev_loss_tmo = 1; 1031} 1032 1033/** 1034 * ibmvfc_release_tgt - Free memory allocated for a target 1035 * @kref: kref struct 1036 * 1037 **/ 1038static void ibmvfc_release_tgt(struct kref *kref) 1039{ 1040 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1041 kfree(tgt); 1042} 1043 1044/** 1045 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1046 * @starget: scsi target struct 1047 * 1048 * Return value: 1049 * none 1050 **/ 1051static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1052{ 1053 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1054 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1055 if (tgt) 1056 kref_put(&tgt->kref, ibmvfc_release_tgt); 1057} 1058 1059/** 1060 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1061 * @starget: scsi target struct 1062 * 1063 * Return value: 1064 * none 1065 **/ 1066static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1067{ 1068 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1069 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1070 if (tgt) 1071 kref_put(&tgt->kref, ibmvfc_release_tgt); 1072} 1073 1074/** 1075 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1076 * @starget: scsi target struct 1077 * 1078 * Return value: 1079 * none 1080 **/ 1081static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1082{ 1083 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1084 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1085 if (tgt) 1086 kref_put(&tgt->kref, ibmvfc_release_tgt); 1087} 1088 1089/** 1090 * ibmvfc_wait_while_resetting - Wait while the host resets 1091 * @vhost: ibmvfc host struct 1092 * 1093 * Return value: 1094 * 0 on success / other on failure 1095 **/ 1096static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1097{ 1098 long timeout = wait_event_timeout(vhost->init_wait_q, 1099 ((vhost->state == IBMVFC_ACTIVE || 1100 vhost->state == IBMVFC_HOST_OFFLINE || 1101 vhost->state == IBMVFC_LINK_DEAD) && 1102 vhost->action == IBMVFC_HOST_ACTION_NONE), 1103 (init_timeout * HZ)); 1104 1105 return timeout ? 0 : -EIO; 1106} 1107 1108/** 1109 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1110 * @shost: scsi host struct 1111 * 1112 * Return value: 1113 * 0 on success / other on failure 1114 **/ 1115static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1116{ 1117 struct ibmvfc_host *vhost = shost_priv(shost); 1118 1119 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1120 ibmvfc_reset_host(vhost); 1121 return ibmvfc_wait_while_resetting(vhost); 1122} 1123 1124/** 1125 * ibmvfc_gather_partition_info - Gather info about the LPAR 1126 * 1127 * Return value: 1128 * none 1129 **/ 1130static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1131{ 1132 struct device_node *rootdn; 1133 const char *name; 1134 const unsigned int *num; 1135 1136 rootdn = of_find_node_by_path("/"); 1137 if (!rootdn) 1138 return; 1139 1140 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1141 if (name) 1142 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1143 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1144 if (num) 1145 vhost->partition_number = *num; 1146 of_node_put(rootdn); 1147} 1148 1149/** 1150 * ibmvfc_set_login_info - Setup info for NPIV login 1151 * @vhost: ibmvfc host struct 1152 * 1153 * Return value: 1154 * none 1155 **/ 1156static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1157{ 1158 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1159 struct device_node *of_node = vhost->dev->archdata.of_node; 1160 const char *location; 1161 1162 memset(login_info, 0, sizeof(*login_info)); 1163 1164 login_info->ostype = IBMVFC_OS_LINUX; 1165 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; 1166 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); 1167 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); 1168 login_info->partition_num = vhost->partition_number; 1169 login_info->vfc_frame_version = 1; 1170 login_info->fcp_version = 3; 1171 login_info->flags = IBMVFC_FLUSH_ON_HALT; 1172 if (vhost->client_migrated) 1173 login_info->flags |= IBMVFC_CLIENT_MIGRATED; 1174 1175 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1176 login_info->capabilities = IBMVFC_CAN_MIGRATE; 1177 login_info->async.va = vhost->async_crq.msg_token; 1178 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); 1179 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1180 strncpy(login_info->device_name, 1181 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1182 1183 location = of_get_property(of_node, "ibm,loc-code", NULL); 1184 location = location ? location : dev_name(vhost->dev); 1185 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1186} 1187 1188/** 1189 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1190 * @vhost: ibmvfc host who owns the event pool 1191 * 1192 * Returns zero on success. 1193 **/ 1194static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1195{ 1196 int i; 1197 struct ibmvfc_event_pool *pool = &vhost->pool; 1198 1199 ENTER; 1200 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1201 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1202 if (!pool->events) 1203 return -ENOMEM; 1204 1205 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1206 pool->size * sizeof(*pool->iu_storage), 1207 &pool->iu_token, 0); 1208 1209 if (!pool->iu_storage) { 1210 kfree(pool->events); 1211 return -ENOMEM; 1212 } 1213 1214 for (i = 0; i < pool->size; ++i) { 1215 struct ibmvfc_event *evt = &pool->events[i]; 1216 atomic_set(&evt->free, 1); 1217 evt->crq.valid = 0x80; 1218 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); 1219 evt->xfer_iu = pool->iu_storage + i; 1220 evt->vhost = vhost; 1221 evt->ext_list = NULL; 1222 list_add_tail(&evt->queue, &vhost->free); 1223 } 1224 1225 LEAVE; 1226 return 0; 1227} 1228 1229/** 1230 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1231 * @vhost: ibmvfc host who owns the event pool 1232 * 1233 **/ 1234static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1235{ 1236 int i; 1237 struct ibmvfc_event_pool *pool = &vhost->pool; 1238 1239 ENTER; 1240 for (i = 0; i < pool->size; ++i) { 1241 list_del(&pool->events[i].queue); 1242 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1243 if (pool->events[i].ext_list) 1244 dma_pool_free(vhost->sg_pool, 1245 pool->events[i].ext_list, 1246 pool->events[i].ext_list_token); 1247 } 1248 1249 kfree(pool->events); 1250 dma_free_coherent(vhost->dev, 1251 pool->size * sizeof(*pool->iu_storage), 1252 pool->iu_storage, pool->iu_token); 1253 LEAVE; 1254} 1255 1256/** 1257 * ibmvfc_get_event - Gets the next free event in pool 1258 * @vhost: ibmvfc host struct 1259 * 1260 * Returns a free event from the pool. 1261 **/ 1262static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1263{ 1264 struct ibmvfc_event *evt; 1265 1266 BUG_ON(list_empty(&vhost->free)); 1267 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1268 atomic_set(&evt->free, 0); 1269 list_del(&evt->queue); 1270 return evt; 1271} 1272 1273/** 1274 * ibmvfc_init_event - Initialize fields in an event struct that are always 1275 * required. 1276 * @evt: The event 1277 * @done: Routine to call when the event is responded to 1278 * @format: SRP or MAD format 1279 **/ 1280static void ibmvfc_init_event(struct ibmvfc_event *evt, 1281 void (*done) (struct ibmvfc_event *), u8 format) 1282{ 1283 evt->cmnd = NULL; 1284 evt->sync_iu = NULL; 1285 evt->crq.format = format; 1286 evt->done = done; 1287 evt->eh_comp = NULL; 1288} 1289 1290/** 1291 * ibmvfc_map_sg_list - Initialize scatterlist 1292 * @scmd: scsi command struct 1293 * @nseg: number of scatterlist segments 1294 * @md: memory descriptor list to initialize 1295 **/ 1296static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1297 struct srp_direct_buf *md) 1298{ 1299 int i; 1300 struct scatterlist *sg; 1301 1302 scsi_for_each_sg(scmd, sg, nseg, i) { 1303 md[i].va = sg_dma_address(sg); 1304 md[i].len = sg_dma_len(sg); 1305 md[i].key = 0; 1306 } 1307} 1308 1309/** 1310 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1311 * @scmd: Scsi_Cmnd with the scatterlist 1312 * @evt: ibmvfc event struct 1313 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1314 * @dev: device for which to map dma memory 1315 * 1316 * Returns: 1317 * 0 on success / non-zero on failure 1318 **/ 1319static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1320 struct ibmvfc_event *evt, 1321 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1322{ 1323 1324 int sg_mapped; 1325 struct srp_direct_buf *data = &vfc_cmd->ioba; 1326 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1327 1328 sg_mapped = scsi_dma_map(scmd); 1329 if (!sg_mapped) { 1330 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; 1331 return 0; 1332 } else if (unlikely(sg_mapped < 0)) { 1333 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1334 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1335 return sg_mapped; 1336 } 1337 1338 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1339 vfc_cmd->flags |= IBMVFC_WRITE; 1340 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1341 } else { 1342 vfc_cmd->flags |= IBMVFC_READ; 1343 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1344 } 1345 1346 if (sg_mapped == 1) { 1347 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1348 return 0; 1349 } 1350 1351 vfc_cmd->flags |= IBMVFC_SCATTERLIST; 1352 1353 if (!evt->ext_list) { 1354 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1355 &evt->ext_list_token); 1356 1357 if (!evt->ext_list) { 1358 scsi_dma_unmap(scmd); 1359 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1360 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1361 return -ENOMEM; 1362 } 1363 } 1364 1365 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1366 1367 data->va = evt->ext_list_token; 1368 data->len = sg_mapped * sizeof(struct srp_direct_buf); 1369 data->key = 0; 1370 return 0; 1371} 1372 1373/** 1374 * ibmvfc_timeout - Internal command timeout handler 1375 * @evt: struct ibmvfc_event that timed out 1376 * 1377 * Called when an internally generated command times out 1378 **/ 1379static void ibmvfc_timeout(struct ibmvfc_event *evt) 1380{ 1381 struct ibmvfc_host *vhost = evt->vhost; 1382 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1383 ibmvfc_reset_host(vhost); 1384} 1385 1386/** 1387 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1388 * @evt: event to be sent 1389 * @vhost: ibmvfc host struct 1390 * @timeout: timeout in seconds - 0 means do not time command 1391 * 1392 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1393 **/ 1394static int ibmvfc_send_event(struct ibmvfc_event *evt, 1395 struct ibmvfc_host *vhost, unsigned long timeout) 1396{ 1397 u64 *crq_as_u64 = (u64 *) &evt->crq; 1398 int rc; 1399 1400 /* Copy the IU into the transfer area */ 1401 *evt->xfer_iu = evt->iu; 1402 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1403 evt->xfer_iu->cmd.tag = (u64)evt; 1404 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1405 evt->xfer_iu->mad_common.tag = (u64)evt; 1406 else 1407 BUG(); 1408 1409 list_add_tail(&evt->queue, &vhost->sent); 1410 init_timer(&evt->timer); 1411 1412 if (timeout) { 1413 evt->timer.data = (unsigned long) evt; 1414 evt->timer.expires = jiffies + (timeout * HZ); 1415 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; 1416 add_timer(&evt->timer); 1417 } 1418 1419 mb(); 1420 1421 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { 1422 list_del(&evt->queue); 1423 del_timer(&evt->timer); 1424 1425 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1426 * Firmware will send a CRQ with a transport event (0xFF) to 1427 * tell this client what has happened to the transport. This 1428 * will be handled in ibmvfc_handle_crq() 1429 */ 1430 if (rc == H_CLOSED) { 1431 if (printk_ratelimit()) 1432 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1433 if (evt->cmnd) 1434 scsi_dma_unmap(evt->cmnd); 1435 ibmvfc_free_event(evt); 1436 return SCSI_MLQUEUE_HOST_BUSY; 1437 } 1438 1439 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1440 if (evt->cmnd) { 1441 evt->cmnd->result = DID_ERROR << 16; 1442 evt->done = ibmvfc_scsi_eh_done; 1443 } else 1444 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; 1445 1446 evt->done(evt); 1447 } else 1448 ibmvfc_trc_start(evt); 1449 1450 return 0; 1451} 1452 1453/** 1454 * ibmvfc_log_error - Log an error for the failed command if appropriate 1455 * @evt: ibmvfc event to log 1456 * 1457 **/ 1458static void ibmvfc_log_error(struct ibmvfc_event *evt) 1459{ 1460 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1461 struct ibmvfc_host *vhost = evt->vhost; 1462 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1463 struct scsi_cmnd *cmnd = evt->cmnd; 1464 const char *err = unknown_error; 1465 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 1466 int logerr = 0; 1467 int rsp_code = 0; 1468 1469 if (index >= 0) { 1470 logerr = cmd_status[index].log; 1471 err = cmd_status[index].name; 1472 } 1473 1474 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1475 return; 1476 1477 if (rsp->flags & FCP_RSP_LEN_VALID) 1478 rsp_code = rsp->data.info.rsp_code; 1479 1480 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1481 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1482 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1483 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1484} 1485 1486/** 1487 * ibmvfc_relogin - Log back into the specified device 1488 * @sdev: scsi device struct 1489 * 1490 **/ 1491static void ibmvfc_relogin(struct scsi_device *sdev) 1492{ 1493 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1494 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1495 struct ibmvfc_target *tgt; 1496 1497 list_for_each_entry(tgt, &vhost->targets, queue) { 1498 if (rport == tgt->rport) { 1499 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 1500 break; 1501 } 1502 } 1503 1504 ibmvfc_reinit_host(vhost); 1505} 1506 1507/** 1508 * ibmvfc_scsi_done - Handle responses from commands 1509 * @evt: ibmvfc event to be handled 1510 * 1511 * Used as a callback when sending scsi cmds. 1512 **/ 1513static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1514{ 1515 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1516 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1517 struct scsi_cmnd *cmnd = evt->cmnd; 1518 u32 rsp_len = 0; 1519 u32 sense_len = rsp->fcp_sense_len; 1520 1521 if (cmnd) { 1522 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) 1523 scsi_set_resid(cmnd, vfc_cmd->adapter_resid); 1524 else if (rsp->flags & FCP_RESID_UNDER) 1525 scsi_set_resid(cmnd, rsp->fcp_resid); 1526 else 1527 scsi_set_resid(cmnd, 0); 1528 1529 if (vfc_cmd->status) { 1530 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1531 1532 if (rsp->flags & FCP_RSP_LEN_VALID) 1533 rsp_len = rsp->fcp_rsp_len; 1534 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1535 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1536 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1537 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1538 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED)) 1539 ibmvfc_relogin(cmnd->device); 1540 1541 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1542 cmnd->result = (DID_ERROR << 16); 1543 1544 ibmvfc_log_error(evt); 1545 } 1546 1547 if (!cmnd->result && 1548 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1549 cmnd->result = (DID_ERROR << 16); 1550 1551 scsi_dma_unmap(cmnd); 1552 cmnd->scsi_done(cmnd); 1553 } 1554 1555 if (evt->eh_comp) 1556 complete(evt->eh_comp); 1557 1558 ibmvfc_free_event(evt); 1559} 1560 1561/** 1562 * ibmvfc_host_chkready - Check if the host can accept commands 1563 * @vhost: struct ibmvfc host 1564 * 1565 * Returns: 1566 * 1 if host can accept command / 0 if not 1567 **/ 1568static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1569{ 1570 int result = 0; 1571 1572 switch (vhost->state) { 1573 case IBMVFC_LINK_DEAD: 1574 case IBMVFC_HOST_OFFLINE: 1575 result = DID_NO_CONNECT << 16; 1576 break; 1577 case IBMVFC_NO_CRQ: 1578 case IBMVFC_INITIALIZING: 1579 case IBMVFC_HALTED: 1580 case IBMVFC_LINK_DOWN: 1581 result = DID_REQUEUE << 16; 1582 break; 1583 case IBMVFC_ACTIVE: 1584 result = 0; 1585 break; 1586 }; 1587 1588 return result; 1589} 1590 1591/** 1592 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1593 * @cmnd: struct scsi_cmnd to be executed 1594 * @done: Callback function to be called when cmnd is completed 1595 * 1596 * Returns: 1597 * 0 on success / other on failure 1598 **/ 1599static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, 1600 void (*done) (struct scsi_cmnd *)) 1601{ 1602 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1603 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1604 struct ibmvfc_cmd *vfc_cmd; 1605 struct ibmvfc_event *evt; 1606 u8 tag[2]; 1607 int rc; 1608 1609 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1610 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1611 cmnd->result = rc; 1612 done(cmnd); 1613 return 0; 1614 } 1615 1616 cmnd->result = (DID_OK << 16); 1617 evt = ibmvfc_get_event(vhost); 1618 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1619 evt->cmnd = cmnd; 1620 cmnd->scsi_done = done; 1621 vfc_cmd = &evt->iu.cmd; 1622 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1623 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1624 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); 1625 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; 1626 vfc_cmd->payload_len = sizeof(vfc_cmd->iu); 1627 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); 1628 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; 1629 vfc_cmd->tgt_scsi_id = rport->port_id; 1630 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); 1631 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1632 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1633 1634 if (scsi_populate_tag_msg(cmnd, tag)) { 1635 vfc_cmd->task_tag = tag[1]; 1636 switch (tag[0]) { 1637 case MSG_SIMPLE_TAG: 1638 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1639 break; 1640 case MSG_HEAD_TAG: 1641 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; 1642 break; 1643 case MSG_ORDERED_TAG: 1644 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; 1645 break; 1646 }; 1647 } 1648 1649 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1650 return ibmvfc_send_event(evt, vhost, 0); 1651 1652 ibmvfc_free_event(evt); 1653 if (rc == -ENOMEM) 1654 return SCSI_MLQUEUE_HOST_BUSY; 1655 1656 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1657 scmd_printk(KERN_ERR, cmnd, 1658 "Failed to map DMA buffer for command. rc=%d\n", rc); 1659 1660 cmnd->result = DID_ERROR << 16; 1661 done(cmnd); 1662 return 0; 1663} 1664 1665/** 1666 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1667 * @evt: ibmvfc event struct 1668 * 1669 **/ 1670static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1671{ 1672 /* copy the response back */ 1673 if (evt->sync_iu) 1674 *evt->sync_iu = *evt->xfer_iu; 1675 1676 complete(&evt->comp); 1677} 1678 1679/** 1680 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 1681 * @evt: struct ibmvfc_event 1682 * 1683 **/ 1684static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 1685{ 1686 struct ibmvfc_host *vhost = evt->vhost; 1687 1688 ibmvfc_free_event(evt); 1689 vhost->aborting_passthru = 0; 1690 dev_info(vhost->dev, "Passthru command cancelled\n"); 1691} 1692 1693/** 1694 * ibmvfc_bsg_timeout - Handle a BSG timeout 1695 * @job: struct fc_bsg_job that timed out 1696 * 1697 * Returns: 1698 * 0 on success / other on failure 1699 **/ 1700static int ibmvfc_bsg_timeout(struct fc_bsg_job *job) 1701{ 1702 struct ibmvfc_host *vhost = shost_priv(job->shost); 1703 unsigned long port_id = (unsigned long)job->dd_data; 1704 struct ibmvfc_event *evt; 1705 struct ibmvfc_tmf *tmf; 1706 unsigned long flags; 1707 int rc; 1708 1709 ENTER; 1710 spin_lock_irqsave(vhost->host->host_lock, flags); 1711 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 1712 __ibmvfc_reset_host(vhost); 1713 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1714 return 0; 1715 } 1716 1717 vhost->aborting_passthru = 1; 1718 evt = ibmvfc_get_event(vhost); 1719 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 1720 1721 tmf = &evt->iu.tmf; 1722 memset(tmf, 0, sizeof(*tmf)); 1723 tmf->common.version = 1; 1724 tmf->common.opcode = IBMVFC_TMF_MAD; 1725 tmf->common.length = sizeof(*tmf); 1726 tmf->scsi_id = port_id; 1727 tmf->cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY; 1728 tmf->my_cancel_key = IBMVFC_INTERNAL_CANCEL_KEY; 1729 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1730 1731 if (rc != 0) { 1732 vhost->aborting_passthru = 0; 1733 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 1734 rc = -EIO; 1735 } else 1736 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 1737 port_id); 1738 1739 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1740 1741 LEAVE; 1742 return rc; 1743} 1744 1745/** 1746 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 1747 * @vhost: struct ibmvfc_host to send command 1748 * @port_id: port ID to send command 1749 * 1750 * Returns: 1751 * 0 on success / other on failure 1752 **/ 1753static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 1754{ 1755 struct ibmvfc_port_login *plogi; 1756 struct ibmvfc_target *tgt; 1757 struct ibmvfc_event *evt; 1758 union ibmvfc_iu rsp_iu; 1759 unsigned long flags; 1760 int rc = 0, issue_login = 1; 1761 1762 ENTER; 1763 spin_lock_irqsave(vhost->host->host_lock, flags); 1764 list_for_each_entry(tgt, &vhost->targets, queue) { 1765 if (tgt->scsi_id == port_id) { 1766 issue_login = 0; 1767 break; 1768 } 1769 } 1770 1771 if (!issue_login) 1772 goto unlock_out; 1773 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 1774 goto unlock_out; 1775 1776 evt = ibmvfc_get_event(vhost); 1777 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1778 plogi = &evt->iu.plogi; 1779 memset(plogi, 0, sizeof(*plogi)); 1780 plogi->common.version = 1; 1781 plogi->common.opcode = IBMVFC_PORT_LOGIN; 1782 plogi->common.length = sizeof(*plogi); 1783 plogi->scsi_id = port_id; 1784 evt->sync_iu = &rsp_iu; 1785 init_completion(&evt->comp); 1786 1787 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1788 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1789 1790 if (rc) 1791 return -EIO; 1792 1793 wait_for_completion(&evt->comp); 1794 1795 if (rsp_iu.plogi.common.status) 1796 rc = -EIO; 1797 1798 spin_lock_irqsave(vhost->host->host_lock, flags); 1799 ibmvfc_free_event(evt); 1800unlock_out: 1801 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1802 LEAVE; 1803 return rc; 1804} 1805 1806/** 1807 * ibmvfc_bsg_request - Handle a BSG request 1808 * @job: struct fc_bsg_job to be executed 1809 * 1810 * Returns: 1811 * 0 on success / other on failure 1812 **/ 1813static int ibmvfc_bsg_request(struct fc_bsg_job *job) 1814{ 1815 struct ibmvfc_host *vhost = shost_priv(job->shost); 1816 struct fc_rport *rport = job->rport; 1817 struct ibmvfc_passthru_mad *mad; 1818 struct ibmvfc_event *evt; 1819 union ibmvfc_iu rsp_iu; 1820 unsigned long flags, port_id = -1; 1821 unsigned int code = job->request->msgcode; 1822 int rc = 0, req_seg, rsp_seg, issue_login = 0; 1823 u32 fc_flags, rsp_len; 1824 1825 ENTER; 1826 job->reply->reply_payload_rcv_len = 0; 1827 if (rport) 1828 port_id = rport->port_id; 1829 1830 switch (code) { 1831 case FC_BSG_HST_ELS_NOLOGIN: 1832 port_id = (job->request->rqst_data.h_els.port_id[0] << 16) | 1833 (job->request->rqst_data.h_els.port_id[1] << 8) | 1834 job->request->rqst_data.h_els.port_id[2]; 1835 case FC_BSG_RPT_ELS: 1836 fc_flags = IBMVFC_FC_ELS; 1837 break; 1838 case FC_BSG_HST_CT: 1839 issue_login = 1; 1840 port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) | 1841 (job->request->rqst_data.h_ct.port_id[1] << 8) | 1842 job->request->rqst_data.h_ct.port_id[2]; 1843 case FC_BSG_RPT_CT: 1844 fc_flags = IBMVFC_FC_CT_IU; 1845 break; 1846 default: 1847 return -ENOTSUPP; 1848 }; 1849 1850 if (port_id == -1) 1851 return -EINVAL; 1852 if (!mutex_trylock(&vhost->passthru_mutex)) 1853 return -EBUSY; 1854 1855 job->dd_data = (void *)port_id; 1856 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 1857 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1858 1859 if (!req_seg) { 1860 mutex_unlock(&vhost->passthru_mutex); 1861 return -ENOMEM; 1862 } 1863 1864 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 1865 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1866 1867 if (!rsp_seg) { 1868 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1869 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1870 mutex_unlock(&vhost->passthru_mutex); 1871 return -ENOMEM; 1872 } 1873 1874 if (req_seg > 1 || rsp_seg > 1) { 1875 rc = -EINVAL; 1876 goto out; 1877 } 1878 1879 if (issue_login) 1880 rc = ibmvfc_bsg_plogi(vhost, port_id); 1881 1882 spin_lock_irqsave(vhost->host->host_lock, flags); 1883 1884 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 1885 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1886 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1887 goto out; 1888 } 1889 1890 evt = ibmvfc_get_event(vhost); 1891 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1892 mad = &evt->iu.passthru; 1893 1894 memset(mad, 0, sizeof(*mad)); 1895 mad->common.version = 1; 1896 mad->common.opcode = IBMVFC_PASSTHRU; 1897 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 1898 1899 mad->cmd_ioba.va = (u64)evt->crq.ioba + 1900 offsetof(struct ibmvfc_passthru_mad, iu); 1901 mad->cmd_ioba.len = sizeof(mad->iu); 1902 1903 mad->iu.cmd_len = job->request_payload.payload_len; 1904 mad->iu.rsp_len = job->reply_payload.payload_len; 1905 mad->iu.flags = fc_flags; 1906 mad->iu.cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY; 1907 1908 mad->iu.cmd.va = sg_dma_address(job->request_payload.sg_list); 1909 mad->iu.cmd.len = sg_dma_len(job->request_payload.sg_list); 1910 mad->iu.rsp.va = sg_dma_address(job->reply_payload.sg_list); 1911 mad->iu.rsp.len = sg_dma_len(job->reply_payload.sg_list); 1912 mad->iu.scsi_id = port_id; 1913 mad->iu.tag = (u64)evt; 1914 rsp_len = mad->iu.rsp.len; 1915 1916 evt->sync_iu = &rsp_iu; 1917 init_completion(&evt->comp); 1918 rc = ibmvfc_send_event(evt, vhost, 0); 1919 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1920 1921 if (rc) { 1922 rc = -EIO; 1923 goto out; 1924 } 1925 1926 wait_for_completion(&evt->comp); 1927 1928 if (rsp_iu.passthru.common.status) 1929 rc = -EIO; 1930 else 1931 job->reply->reply_payload_rcv_len = rsp_len; 1932 1933 spin_lock_irqsave(vhost->host->host_lock, flags); 1934 ibmvfc_free_event(evt); 1935 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1936 job->reply->result = rc; 1937 job->job_done(job); 1938 rc = 0; 1939out: 1940 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1941 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1942 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 1943 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1944 mutex_unlock(&vhost->passthru_mutex); 1945 LEAVE; 1946 return rc; 1947} 1948 1949/** 1950 * ibmvfc_reset_device - Reset the device with the specified reset type 1951 * @sdev: scsi device to reset 1952 * @type: reset type 1953 * @desc: reset type description for log messages 1954 * 1955 * Returns: 1956 * 0 on success / other on failure 1957 **/ 1958static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1959{ 1960 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1961 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1962 struct ibmvfc_cmd *tmf; 1963 struct ibmvfc_event *evt = NULL; 1964 union ibmvfc_iu rsp_iu; 1965 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1966 int rsp_rc = -EBUSY; 1967 unsigned long flags; 1968 int rsp_code = 0; 1969 1970 spin_lock_irqsave(vhost->host->host_lock, flags); 1971 if (vhost->state == IBMVFC_ACTIVE) { 1972 evt = ibmvfc_get_event(vhost); 1973 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1974 1975 tmf = &evt->iu.cmd; 1976 memset(tmf, 0, sizeof(*tmf)); 1977 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1978 tmf->resp.len = sizeof(tmf->rsp); 1979 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1980 tmf->payload_len = sizeof(tmf->iu); 1981 tmf->resp_len = sizeof(tmf->rsp); 1982 tmf->cancel_key = (unsigned long)sdev->hostdata; 1983 tmf->tgt_scsi_id = rport->port_id; 1984 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1985 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1986 tmf->iu.tmf_flags = type; 1987 evt->sync_iu = &rsp_iu; 1988 1989 init_completion(&evt->comp); 1990 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1991 } 1992 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1993 1994 if (rsp_rc != 0) { 1995 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 1996 desc, rsp_rc); 1997 return -EIO; 1998 } 1999 2000 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2001 wait_for_completion(&evt->comp); 2002 2003 if (rsp_iu.cmd.status) 2004 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2005 2006 if (rsp_code) { 2007 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2008 rsp_code = fc_rsp->data.info.rsp_code; 2009 2010 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2011 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2012 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 2013 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2014 fc_rsp->scsi_status); 2015 rsp_rc = -EIO; 2016 } else 2017 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2018 2019 spin_lock_irqsave(vhost->host->host_lock, flags); 2020 ibmvfc_free_event(evt); 2021 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2022 return rsp_rc; 2023} 2024 2025/** 2026 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2027 * @sdev: scsi device to abort commands 2028 * 2029 * This sends an Abort Task Set to the VIOS for the specified device. This does 2030 * NOT send any cancel to the VIOS. That must be done separately. 2031 * 2032 * Returns: 2033 * 0 on success / other on failure 2034 **/ 2035static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2036{ 2037 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2038 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2039 struct ibmvfc_cmd *tmf; 2040 struct ibmvfc_event *evt, *found_evt; 2041 union ibmvfc_iu rsp_iu; 2042 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 2043 int rsp_rc = -EBUSY; 2044 unsigned long flags; 2045 int rsp_code = 0; 2046 2047 spin_lock_irqsave(vhost->host->host_lock, flags); 2048 found_evt = NULL; 2049 list_for_each_entry(evt, &vhost->sent, queue) { 2050 if (evt->cmnd && evt->cmnd->device == sdev) { 2051 found_evt = evt; 2052 break; 2053 } 2054 } 2055 2056 if (!found_evt) { 2057 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2058 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2059 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2060 return 0; 2061 } 2062 2063 if (vhost->state == IBMVFC_ACTIVE) { 2064 evt = ibmvfc_get_event(vhost); 2065 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2066 2067 tmf = &evt->iu.cmd; 2068 memset(tmf, 0, sizeof(*tmf)); 2069 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 2070 tmf->resp.len = sizeof(tmf->rsp); 2071 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 2072 tmf->payload_len = sizeof(tmf->iu); 2073 tmf->resp_len = sizeof(tmf->rsp); 2074 tmf->cancel_key = (unsigned long)sdev->hostdata; 2075 tmf->tgt_scsi_id = rport->port_id; 2076 int_to_scsilun(sdev->lun, &tmf->iu.lun); 2077 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 2078 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 2079 evt->sync_iu = &rsp_iu; 2080 2081 init_completion(&evt->comp); 2082 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2083 } 2084 2085 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2086 2087 if (rsp_rc != 0) { 2088 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2089 return -EIO; 2090 } 2091 2092 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2093 wait_for_completion(&evt->comp); 2094 2095 if (rsp_iu.cmd.status) 2096 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2097 2098 if (rsp_code) { 2099 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2100 rsp_code = fc_rsp->data.info.rsp_code; 2101 2102 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2103 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2104 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 2105 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2106 fc_rsp->scsi_status); 2107 rsp_rc = -EIO; 2108 } else 2109 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2110 2111 spin_lock_irqsave(vhost->host->host_lock, flags); 2112 ibmvfc_free_event(evt); 2113 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2114 return rsp_rc; 2115} 2116 2117/** 2118 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2119 * @sdev: scsi device to cancel commands 2120 * @type: type of error recovery being performed 2121 * 2122 * This sends a cancel to the VIOS for the specified device. This does 2123 * NOT send any abort to the actual device. That must be done separately. 2124 * 2125 * Returns: 2126 * 0 on success / other on failure 2127 **/ 2128static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2129{ 2130 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2131 struct scsi_target *starget = scsi_target(sdev); 2132 struct fc_rport *rport = starget_to_rport(starget); 2133 struct ibmvfc_tmf *tmf; 2134 struct ibmvfc_event *evt, *found_evt; 2135 union ibmvfc_iu rsp; 2136 int rsp_rc = -EBUSY; 2137 unsigned long flags; 2138 u16 status; 2139 2140 ENTER; 2141 spin_lock_irqsave(vhost->host->host_lock, flags); 2142 found_evt = NULL; 2143 list_for_each_entry(evt, &vhost->sent, queue) { 2144 if (evt->cmnd && evt->cmnd->device == sdev) { 2145 found_evt = evt; 2146 break; 2147 } 2148 } 2149 2150 if (!found_evt) { 2151 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2152 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2153 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2154 return 0; 2155 } 2156 2157 if (vhost->state == IBMVFC_ACTIVE) { 2158 evt = ibmvfc_get_event(vhost); 2159 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2160 2161 tmf = &evt->iu.tmf; 2162 memset(tmf, 0, sizeof(*tmf)); 2163 tmf->common.version = 1; 2164 tmf->common.opcode = IBMVFC_TMF_MAD; 2165 tmf->common.length = sizeof(*tmf); 2166 tmf->scsi_id = rport->port_id; 2167 int_to_scsilun(sdev->lun, &tmf->lun); 2168 tmf->flags = (type | IBMVFC_TMF_LUA_VALID); 2169 tmf->cancel_key = (unsigned long)sdev->hostdata; 2170 tmf->my_cancel_key = (unsigned long)starget->hostdata; 2171 2172 evt->sync_iu = &rsp; 2173 init_completion(&evt->comp); 2174 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2175 } 2176 2177 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2178 2179 if (rsp_rc != 0) { 2180 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2181 return -EIO; 2182 } 2183 2184 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2185 2186 wait_for_completion(&evt->comp); 2187 status = rsp.mad_common.status; 2188 spin_lock_irqsave(vhost->host->host_lock, flags); 2189 ibmvfc_free_event(evt); 2190 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2191 2192 if (status != IBMVFC_MAD_SUCCESS) { 2193 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2194 return -EIO; 2195 } 2196 2197 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2198 return 0; 2199} 2200 2201/** 2202 * ibmvfc_match_target - Match function for specified target 2203 * @evt: ibmvfc event struct 2204 * @device: device to match (starget) 2205 * 2206 * Returns: 2207 * 1 if event matches starget / 0 if event does not match starget 2208 **/ 2209static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2210{ 2211 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2212 return 1; 2213 return 0; 2214} 2215 2216/** 2217 * ibmvfc_match_lun - Match function for specified LUN 2218 * @evt: ibmvfc event struct 2219 * @device: device to match (sdev) 2220 * 2221 * Returns: 2222 * 1 if event matches sdev / 0 if event does not match sdev 2223 **/ 2224static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2225{ 2226 if (evt->cmnd && evt->cmnd->device == device) 2227 return 1; 2228 return 0; 2229} 2230 2231/** 2232 * ibmvfc_wait_for_ops - Wait for ops to complete 2233 * @vhost: ibmvfc host struct 2234 * @device: device to match (starget or sdev) 2235 * @match: match function 2236 * 2237 * Returns: 2238 * SUCCESS / FAILED 2239 **/ 2240static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2241 int (*match) (struct ibmvfc_event *, void *)) 2242{ 2243 struct ibmvfc_event *evt; 2244 DECLARE_COMPLETION_ONSTACK(comp); 2245 int wait; 2246 unsigned long flags; 2247 signed long timeout = init_timeout * HZ; 2248 2249 ENTER; 2250 do { 2251 wait = 0; 2252 spin_lock_irqsave(vhost->host->host_lock, flags); 2253 list_for_each_entry(evt, &vhost->sent, queue) { 2254 if (match(evt, device)) { 2255 evt->eh_comp = ∁ 2256 wait++; 2257 } 2258 } 2259 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2260 2261 if (wait) { 2262 timeout = wait_for_completion_timeout(&comp, timeout); 2263 2264 if (!timeout) { 2265 wait = 0; 2266 spin_lock_irqsave(vhost->host->host_lock, flags); 2267 list_for_each_entry(evt, &vhost->sent, queue) { 2268 if (match(evt, device)) { 2269 evt->eh_comp = NULL; 2270 wait++; 2271 } 2272 } 2273 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2274 if (wait) 2275 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2276 LEAVE; 2277 return wait ? FAILED : SUCCESS; 2278 } 2279 } 2280 } while (wait); 2281 2282 LEAVE; 2283 return SUCCESS; 2284} 2285 2286/** 2287 * ibmvfc_eh_abort_handler - Abort a command 2288 * @cmd: scsi command to abort 2289 * 2290 * Returns: 2291 * SUCCESS / FAILED 2292 **/ 2293static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2294{ 2295 struct scsi_device *sdev = cmd->device; 2296 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2297 int cancel_rc, abort_rc; 2298 int rc = FAILED; 2299 2300 ENTER; 2301 ibmvfc_wait_while_resetting(vhost); 2302 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2303 abort_rc = ibmvfc_abort_task_set(sdev); 2304 2305 if (!cancel_rc && !abort_rc) 2306 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2307 2308 LEAVE; 2309 return rc; 2310} 2311 2312/** 2313 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2314 * @cmd: scsi command struct 2315 * 2316 * Returns: 2317 * SUCCESS / FAILED 2318 **/ 2319static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2320{ 2321 struct scsi_device *sdev = cmd->device; 2322 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2323 int cancel_rc, reset_rc; 2324 int rc = FAILED; 2325 2326 ENTER; 2327 ibmvfc_wait_while_resetting(vhost); 2328 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2329 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2330 2331 if (!cancel_rc && !reset_rc) 2332 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2333 2334 LEAVE; 2335 return rc; 2336} 2337 2338/** 2339 * ibmvfc_dev_cancel_all_abts - Device iterated cancel all function 2340 * @sdev: scsi device struct 2341 * @data: return code 2342 * 2343 **/ 2344static void ibmvfc_dev_cancel_all_abts(struct scsi_device *sdev, void *data) 2345{ 2346 unsigned long *rc = data; 2347 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2348} 2349 2350/** 2351 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2352 * @sdev: scsi device struct 2353 * @data: return code 2354 * 2355 **/ 2356static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2357{ 2358 unsigned long *rc = data; 2359 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2360} 2361 2362/** 2363 * ibmvfc_dev_abort_all - Device iterated abort task set function 2364 * @sdev: scsi device struct 2365 * @data: return code 2366 * 2367 **/ 2368static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) 2369{ 2370 unsigned long *rc = data; 2371 *rc |= ibmvfc_abort_task_set(sdev); 2372} 2373 2374/** 2375 * ibmvfc_eh_target_reset_handler - Reset the target 2376 * @cmd: scsi command struct 2377 * 2378 * Returns: 2379 * SUCCESS / FAILED 2380 **/ 2381static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2382{ 2383 struct scsi_device *sdev = cmd->device; 2384 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2385 struct scsi_target *starget = scsi_target(sdev); 2386 int reset_rc; 2387 int rc = FAILED; 2388 unsigned long cancel_rc = 0; 2389 2390 ENTER; 2391 ibmvfc_wait_while_resetting(vhost); 2392 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2393 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2394 2395 if (!cancel_rc && !reset_rc) 2396 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2397 2398 LEAVE; 2399 return rc; 2400} 2401 2402/** 2403 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2404 * @cmd: struct scsi_cmnd having problems 2405 * 2406 **/ 2407static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2408{ 2409 int rc; 2410 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2411 2412 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2413 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2414 return rc ? FAILED : SUCCESS; 2415} 2416 2417/** 2418 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2419 * @rport: rport struct 2420 * 2421 * Return value: 2422 * none 2423 **/ 2424static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2425{ 2426 struct scsi_target *starget = to_scsi_target(&rport->dev); 2427 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2428 struct ibmvfc_host *vhost = shost_priv(shost); 2429 unsigned long cancel_rc = 0; 2430 unsigned long abort_rc = 0; 2431 int rc = FAILED; 2432 2433 ENTER; 2434 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_abts); 2435 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); 2436 2437 if (!cancel_rc && !abort_rc) 2438 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2439 2440 if (rc == FAILED) 2441 ibmvfc_issue_fc_host_lip(shost); 2442 LEAVE; 2443} 2444 2445static const struct { 2446 enum ibmvfc_async_event ae; 2447 const char *desc; 2448} ae_desc [] = { 2449 { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, 2450 { IBMVFC_AE_ELS_LOGO, "LOGO" }, 2451 { IBMVFC_AE_ELS_PRLO, "PRLO" }, 2452 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, 2453 { IBMVFC_AE_SCN_GROUP, "Group SCN" }, 2454 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, 2455 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, 2456 { IBMVFC_AE_LINK_UP, "Link Up" }, 2457 { IBMVFC_AE_LINK_DOWN, "Link Down" }, 2458 { IBMVFC_AE_LINK_DEAD, "Link Dead" }, 2459 { IBMVFC_AE_HALT, "Halt" }, 2460 { IBMVFC_AE_RESUME, "Resume" }, 2461 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, 2462}; 2463 2464static const char *unknown_ae = "Unknown async"; 2465 2466/** 2467 * ibmvfc_get_ae_desc - Get text description for async event 2468 * @ae: async event 2469 * 2470 **/ 2471static const char *ibmvfc_get_ae_desc(u64 ae) 2472{ 2473 int i; 2474 2475 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2476 if (ae_desc[i].ae == ae) 2477 return ae_desc[i].desc; 2478 2479 return unknown_ae; 2480} 2481 2482/** 2483 * ibmvfc_handle_async - Handle an async event from the adapter 2484 * @crq: crq to process 2485 * @vhost: ibmvfc host struct 2486 * 2487 **/ 2488static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2489 struct ibmvfc_host *vhost) 2490{ 2491 const char *desc = ibmvfc_get_ae_desc(crq->event); 2492 struct ibmvfc_target *tgt; 2493 2494 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx," 2495 " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name); 2496 2497 switch (crq->event) { 2498 case IBMVFC_AE_RESUME: 2499 switch (crq->link_state) { 2500 case IBMVFC_AE_LS_LINK_DOWN: 2501 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2502 break; 2503 case IBMVFC_AE_LS_LINK_DEAD: 2504 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2505 break; 2506 case IBMVFC_AE_LS_LINK_UP: 2507 case IBMVFC_AE_LS_LINK_BOUNCED: 2508 default: 2509 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2510 vhost->delay_init = 1; 2511 __ibmvfc_reset_host(vhost); 2512 break; 2513 }; 2514 2515 break; 2516 case IBMVFC_AE_LINK_UP: 2517 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2518 vhost->delay_init = 1; 2519 __ibmvfc_reset_host(vhost); 2520 break; 2521 case IBMVFC_AE_SCN_FABRIC: 2522 case IBMVFC_AE_SCN_DOMAIN: 2523 vhost->events_to_log |= IBMVFC_AE_RSCN; 2524 vhost->delay_init = 1; 2525 __ibmvfc_reset_host(vhost); 2526 break; 2527 case IBMVFC_AE_SCN_NPORT: 2528 case IBMVFC_AE_SCN_GROUP: 2529 vhost->events_to_log |= IBMVFC_AE_RSCN; 2530 ibmvfc_reinit_host(vhost); 2531 break; 2532 case IBMVFC_AE_ELS_LOGO: 2533 case IBMVFC_AE_ELS_PRLO: 2534 case IBMVFC_AE_ELS_PLOGI: 2535 list_for_each_entry(tgt, &vhost->targets, queue) { 2536 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 2537 break; 2538 if (crq->scsi_id && tgt->scsi_id != crq->scsi_id) 2539 continue; 2540 if (crq->wwpn && tgt->ids.port_name != crq->wwpn) 2541 continue; 2542 if (crq->node_name && tgt->ids.node_name != crq->node_name) 2543 continue; 2544 if (tgt->need_login && crq->event == IBMVFC_AE_ELS_LOGO) 2545 tgt->logo_rcvd = 1; 2546 if (!tgt->need_login || crq->event == IBMVFC_AE_ELS_PLOGI) { 2547 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2548 ibmvfc_reinit_host(vhost); 2549 } 2550 } 2551 break; 2552 case IBMVFC_AE_LINK_DOWN: 2553 case IBMVFC_AE_ADAPTER_FAILED: 2554 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2555 break; 2556 case IBMVFC_AE_LINK_DEAD: 2557 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2558 break; 2559 case IBMVFC_AE_HALT: 2560 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2561 break; 2562 default: 2563 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2564 break; 2565 }; 2566} 2567 2568/** 2569 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2570 * @crq: Command/Response queue 2571 * @vhost: ibmvfc host struct 2572 * 2573 **/ 2574static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2575{ 2576 long rc; 2577 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; 2578 2579 switch (crq->valid) { 2580 case IBMVFC_CRQ_INIT_RSP: 2581 switch (crq->format) { 2582 case IBMVFC_CRQ_INIT: 2583 dev_info(vhost->dev, "Partner initialized\n"); 2584 /* Send back a response */ 2585 rc = ibmvfc_send_crq_init_complete(vhost); 2586 if (rc == 0) 2587 ibmvfc_init_host(vhost); 2588 else 2589 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2590 break; 2591 case IBMVFC_CRQ_INIT_COMPLETE: 2592 dev_info(vhost->dev, "Partner initialization complete\n"); 2593 ibmvfc_init_host(vhost); 2594 break; 2595 default: 2596 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2597 } 2598 return; 2599 case IBMVFC_CRQ_XPORT_EVENT: 2600 vhost->state = IBMVFC_NO_CRQ; 2601 vhost->logged_in = 0; 2602 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2603 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2604 /* We need to re-setup the interpartition connection */ 2605 dev_info(vhost->dev, "Re-enabling adapter\n"); 2606 vhost->client_migrated = 1; 2607 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2608 if ((rc = ibmvfc_reenable_crq_queue(vhost)) || 2609 (rc = ibmvfc_send_crq_init(vhost))) { 2610 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2611 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); 2612 } else 2613 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2614 } else { 2615 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2616 2617 ibmvfc_purge_requests(vhost, DID_ERROR); 2618 if ((rc = ibmvfc_reset_crq(vhost)) || 2619 (rc = ibmvfc_send_crq_init(vhost))) { 2620 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2621 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); 2622 } else 2623 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2624 } 2625 return; 2626 case IBMVFC_CRQ_CMD_RSP: 2627 break; 2628 default: 2629 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2630 return; 2631 } 2632 2633 if (crq->format == IBMVFC_ASYNC_EVENT) 2634 return; 2635 2636 /* The only kind of payload CRQs we should get are responses to 2637 * things we send. Make sure this response is to something we 2638 * actually sent 2639 */ 2640 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2641 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2642 crq->ioba); 2643 return; 2644 } 2645 2646 if (unlikely(atomic_read(&evt->free))) { 2647 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2648 crq->ioba); 2649 return; 2650 } 2651 2652 del_timer(&evt->timer); 2653 list_del(&evt->queue); 2654 ibmvfc_trc_end(evt); 2655 evt->done(evt); 2656} 2657 2658/** 2659 * ibmvfc_scan_finished - Check if the device scan is done. 2660 * @shost: scsi host struct 2661 * @time: current elapsed time 2662 * 2663 * Returns: 2664 * 0 if scan is not done / 1 if scan is done 2665 **/ 2666static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2667{ 2668 unsigned long flags; 2669 struct ibmvfc_host *vhost = shost_priv(shost); 2670 int done = 0; 2671 2672 spin_lock_irqsave(shost->host_lock, flags); 2673 if (time >= (init_timeout * HZ)) { 2674 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2675 "continuing initialization\n", init_timeout); 2676 done = 1; 2677 } 2678 2679 if (vhost->scan_complete) 2680 done = 1; 2681 spin_unlock_irqrestore(shost->host_lock, flags); 2682 return done; 2683} 2684 2685/** 2686 * ibmvfc_slave_alloc - Setup the device's task set value 2687 * @sdev: struct scsi_device device to configure 2688 * 2689 * Set the device's task set value so that error handling works as 2690 * expected. 2691 * 2692 * Returns: 2693 * 0 on success / -ENXIO if device does not exist 2694 **/ 2695static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2696{ 2697 struct Scsi_Host *shost = sdev->host; 2698 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2699 struct ibmvfc_host *vhost = shost_priv(shost); 2700 unsigned long flags = 0; 2701 2702 if (!rport || fc_remote_port_chkready(rport)) 2703 return -ENXIO; 2704 2705 spin_lock_irqsave(shost->host_lock, flags); 2706 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2707 spin_unlock_irqrestore(shost->host_lock, flags); 2708 return 0; 2709} 2710 2711/** 2712 * ibmvfc_target_alloc - Setup the target's task set value 2713 * @starget: struct scsi_target 2714 * 2715 * Set the target's task set value so that error handling works as 2716 * expected. 2717 * 2718 * Returns: 2719 * 0 on success / -ENXIO if device does not exist 2720 **/ 2721static int ibmvfc_target_alloc(struct scsi_target *starget) 2722{ 2723 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2724 struct ibmvfc_host *vhost = shost_priv(shost); 2725 unsigned long flags = 0; 2726 2727 spin_lock_irqsave(shost->host_lock, flags); 2728 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2729 spin_unlock_irqrestore(shost->host_lock, flags); 2730 return 0; 2731} 2732 2733/** 2734 * ibmvfc_slave_configure - Configure the device 2735 * @sdev: struct scsi_device device to configure 2736 * 2737 * Enable allow_restart for a device if it is a disk. Adjust the 2738 * queue_depth here also. 2739 * 2740 * Returns: 2741 * 0 2742 **/ 2743static int ibmvfc_slave_configure(struct scsi_device *sdev) 2744{ 2745 struct Scsi_Host *shost = sdev->host; 2746 struct fc_rport *rport = starget_to_rport(sdev->sdev_target); 2747 unsigned long flags = 0; 2748 2749 spin_lock_irqsave(shost->host_lock, flags); 2750 if (sdev->type == TYPE_DISK) 2751 sdev->allow_restart = 1; 2752 2753 if (sdev->tagged_supported) { 2754 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 2755 scsi_activate_tcq(sdev, sdev->queue_depth); 2756 } else 2757 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2758 2759 rport->dev_loss_tmo = dev_loss_tmo; 2760 spin_unlock_irqrestore(shost->host_lock, flags); 2761 return 0; 2762} 2763 2764/** 2765 * ibmvfc_change_queue_depth - Change the device's queue depth 2766 * @sdev: scsi device struct 2767 * @qdepth: depth to set 2768 * @reason: calling context 2769 * 2770 * Return value: 2771 * actual depth set 2772 **/ 2773static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth, 2774 int reason) 2775{ 2776 if (reason != SCSI_QDEPTH_DEFAULT) 2777 return -EOPNOTSUPP; 2778 2779 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2780 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2781 2782 scsi_adjust_queue_depth(sdev, 0, qdepth); 2783 return sdev->queue_depth; 2784} 2785 2786/** 2787 * ibmvfc_change_queue_type - Change the device's queue type 2788 * @sdev: scsi device struct 2789 * @tag_type: type of tags to use 2790 * 2791 * Return value: 2792 * actual queue type set 2793 **/ 2794static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) 2795{ 2796 if (sdev->tagged_supported) { 2797 scsi_set_tag_type(sdev, tag_type); 2798 2799 if (tag_type) 2800 scsi_activate_tcq(sdev, sdev->queue_depth); 2801 else 2802 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2803 } else 2804 tag_type = 0; 2805 2806 return tag_type; 2807} 2808 2809static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2810 struct device_attribute *attr, char *buf) 2811{ 2812 struct Scsi_Host *shost = class_to_shost(dev); 2813 struct ibmvfc_host *vhost = shost_priv(shost); 2814 2815 return snprintf(buf, PAGE_SIZE, "%s\n", 2816 vhost->login_buf->resp.partition_name); 2817} 2818 2819static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2820 struct device_attribute *attr, char *buf) 2821{ 2822 struct Scsi_Host *shost = class_to_shost(dev); 2823 struct ibmvfc_host *vhost = shost_priv(shost); 2824 2825 return snprintf(buf, PAGE_SIZE, "%s\n", 2826 vhost->login_buf->resp.device_name); 2827} 2828 2829static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2830 struct device_attribute *attr, char *buf) 2831{ 2832 struct Scsi_Host *shost = class_to_shost(dev); 2833 struct ibmvfc_host *vhost = shost_priv(shost); 2834 2835 return snprintf(buf, PAGE_SIZE, "%s\n", 2836 vhost->login_buf->resp.port_loc_code); 2837} 2838 2839static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2840 struct device_attribute *attr, char *buf) 2841{ 2842 struct Scsi_Host *shost = class_to_shost(dev); 2843 struct ibmvfc_host *vhost = shost_priv(shost); 2844 2845 return snprintf(buf, PAGE_SIZE, "%s\n", 2846 vhost->login_buf->resp.drc_name); 2847} 2848 2849static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2850 struct device_attribute *attr, char *buf) 2851{ 2852 struct Scsi_Host *shost = class_to_shost(dev); 2853 struct ibmvfc_host *vhost = shost_priv(shost); 2854 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2855} 2856 2857static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 2858 struct device_attribute *attr, char *buf) 2859{ 2860 struct Scsi_Host *shost = class_to_shost(dev); 2861 struct ibmvfc_host *vhost = shost_priv(shost); 2862 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); 2863} 2864 2865/** 2866 * ibmvfc_show_log_level - Show the adapter's error logging level 2867 * @dev: class device struct 2868 * @buf: buffer 2869 * 2870 * Return value: 2871 * number of bytes printed to buffer 2872 **/ 2873static ssize_t ibmvfc_show_log_level(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 unsigned long flags = 0; 2879 int len; 2880 2881 spin_lock_irqsave(shost->host_lock, flags); 2882 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2883 spin_unlock_irqrestore(shost->host_lock, flags); 2884 return len; 2885} 2886 2887/** 2888 * ibmvfc_store_log_level - Change the adapter's error logging level 2889 * @dev: class device struct 2890 * @buf: buffer 2891 * 2892 * Return value: 2893 * number of bytes printed to buffer 2894 **/ 2895static ssize_t ibmvfc_store_log_level(struct device *dev, 2896 struct device_attribute *attr, 2897 const char *buf, size_t count) 2898{ 2899 struct Scsi_Host *shost = class_to_shost(dev); 2900 struct ibmvfc_host *vhost = shost_priv(shost); 2901 unsigned long flags = 0; 2902 2903 spin_lock_irqsave(shost->host_lock, flags); 2904 vhost->log_level = simple_strtoul(buf, NULL, 10); 2905 spin_unlock_irqrestore(shost->host_lock, flags); 2906 return strlen(buf); 2907} 2908 2909static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 2910static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 2911static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 2912static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 2913static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 2914static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 2915static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 2916 ibmvfc_show_log_level, ibmvfc_store_log_level); 2917 2918#ifdef CONFIG_SCSI_IBMVFC_TRACE 2919/** 2920 * ibmvfc_read_trace - Dump the adapter trace 2921 * @kobj: kobject struct 2922 * @bin_attr: bin_attribute struct 2923 * @buf: buffer 2924 * @off: offset 2925 * @count: buffer size 2926 * 2927 * Return value: 2928 * number of bytes printed to buffer 2929 **/ 2930static ssize_t ibmvfc_read_trace(struct kobject *kobj, 2931 struct bin_attribute *bin_attr, 2932 char *buf, loff_t off, size_t count) 2933{ 2934 struct device *dev = container_of(kobj, struct device, kobj); 2935 struct Scsi_Host *shost = class_to_shost(dev); 2936 struct ibmvfc_host *vhost = shost_priv(shost); 2937 unsigned long flags = 0; 2938 int size = IBMVFC_TRACE_SIZE; 2939 char *src = (char *)vhost->trace; 2940 2941 if (off > size) 2942 return 0; 2943 if (off + count > size) { 2944 size -= off; 2945 count = size; 2946 } 2947 2948 spin_lock_irqsave(shost->host_lock, flags); 2949 memcpy(buf, &src[off], count); 2950 spin_unlock_irqrestore(shost->host_lock, flags); 2951 return count; 2952} 2953 2954static struct bin_attribute ibmvfc_trace_attr = { 2955 .attr = { 2956 .name = "trace", 2957 .mode = S_IRUGO, 2958 }, 2959 .size = 0, 2960 .read = ibmvfc_read_trace, 2961}; 2962#endif 2963 2964static struct device_attribute *ibmvfc_attrs[] = { 2965 &dev_attr_partition_name, 2966 &dev_attr_device_name, 2967 &dev_attr_port_loc_code, 2968 &dev_attr_drc_name, 2969 &dev_attr_npiv_version, 2970 &dev_attr_capabilities, 2971 &dev_attr_log_level, 2972 NULL 2973}; 2974 2975static struct scsi_host_template driver_template = { 2976 .module = THIS_MODULE, 2977 .name = "IBM POWER Virtual FC Adapter", 2978 .proc_name = IBMVFC_NAME, 2979 .queuecommand = ibmvfc_queuecommand, 2980 .eh_abort_handler = ibmvfc_eh_abort_handler, 2981 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 2982 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 2983 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 2984 .slave_alloc = ibmvfc_slave_alloc, 2985 .slave_configure = ibmvfc_slave_configure, 2986 .target_alloc = ibmvfc_target_alloc, 2987 .scan_finished = ibmvfc_scan_finished, 2988 .change_queue_depth = ibmvfc_change_queue_depth, 2989 .change_queue_type = ibmvfc_change_queue_type, 2990 .cmd_per_lun = 16, 2991 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 2992 .this_id = -1, 2993 .sg_tablesize = SG_ALL, 2994 .max_sectors = IBMVFC_MAX_SECTORS, 2995 .use_clustering = ENABLE_CLUSTERING, 2996 .shost_attrs = ibmvfc_attrs, 2997}; 2998 2999/** 3000 * ibmvfc_next_async_crq - Returns the next entry in async queue 3001 * @vhost: ibmvfc host struct 3002 * 3003 * Returns: 3004 * Pointer to next entry in queue / NULL if empty 3005 **/ 3006static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3007{ 3008 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 3009 struct ibmvfc_async_crq *crq; 3010 3011 crq = &async_crq->msgs[async_crq->cur]; 3012 if (crq->valid & 0x80) { 3013 if (++async_crq->cur == async_crq->size) 3014 async_crq->cur = 0; 3015 } else 3016 crq = NULL; 3017 3018 return crq; 3019} 3020 3021/** 3022 * ibmvfc_next_crq - Returns the next entry in message queue 3023 * @vhost: ibmvfc host struct 3024 * 3025 * Returns: 3026 * Pointer to next entry in queue / NULL if empty 3027 **/ 3028static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3029{ 3030 struct ibmvfc_crq_queue *queue = &vhost->crq; 3031 struct ibmvfc_crq *crq; 3032 3033 crq = &queue->msgs[queue->cur]; 3034 if (crq->valid & 0x80) { 3035 if (++queue->cur == queue->size) 3036 queue->cur = 0; 3037 } else 3038 crq = NULL; 3039 3040 return crq; 3041} 3042 3043/** 3044 * ibmvfc_interrupt - Interrupt handler 3045 * @irq: number of irq to handle, not used 3046 * @dev_instance: ibmvfc_host that received interrupt 3047 * 3048 * Returns: 3049 * IRQ_HANDLED 3050 **/ 3051static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3052{ 3053 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3054 unsigned long flags; 3055 3056 spin_lock_irqsave(vhost->host->host_lock, flags); 3057 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3058 tasklet_schedule(&vhost->tasklet); 3059 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3060 return IRQ_HANDLED; 3061} 3062 3063/** 3064 * ibmvfc_tasklet - Interrupt handler tasklet 3065 * @data: ibmvfc host struct 3066 * 3067 * Returns: 3068 * Nothing 3069 **/ 3070static void ibmvfc_tasklet(void *data) 3071{ 3072 struct ibmvfc_host *vhost = data; 3073 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3074 struct ibmvfc_crq *crq; 3075 struct ibmvfc_async_crq *async; 3076 unsigned long flags; 3077 int done = 0; 3078 3079 spin_lock_irqsave(vhost->host->host_lock, flags); 3080 while (!done) { 3081 /* Pull all the valid messages off the async CRQ */ 3082 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3083 ibmvfc_handle_async(async, vhost); 3084 async->valid = 0; 3085 } 3086 3087 /* Pull all the valid messages off the CRQ */ 3088 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3089 ibmvfc_handle_crq(crq, vhost); 3090 crq->valid = 0; 3091 } 3092 3093 vio_enable_interrupts(vdev); 3094 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3095 vio_disable_interrupts(vdev); 3096 ibmvfc_handle_async(async, vhost); 3097 async->valid = 0; 3098 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3099 vio_disable_interrupts(vdev); 3100 ibmvfc_handle_crq(crq, vhost); 3101 crq->valid = 0; 3102 } else 3103 done = 1; 3104 } 3105 3106 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3107} 3108 3109/** 3110 * ibmvfc_init_tgt - Set the next init job step for the target 3111 * @tgt: ibmvfc target struct 3112 * @job_step: job step to perform 3113 * 3114 **/ 3115static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3116 void (*job_step) (struct ibmvfc_target *)) 3117{ 3118 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 3119 tgt->job_step = job_step; 3120 wake_up(&tgt->vhost->work_wait_q); 3121} 3122 3123/** 3124 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3125 * @tgt: ibmvfc target struct 3126 * @job_step: initialization job step 3127 * 3128 * Returns: 1 if step will be retried / 0 if not 3129 * 3130 **/ 3131static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3132 void (*job_step) (struct ibmvfc_target *)) 3133{ 3134 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3135 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3136 wake_up(&tgt->vhost->work_wait_q); 3137 return 0; 3138 } else 3139 ibmvfc_init_tgt(tgt, job_step); 3140 return 1; 3141} 3142 3143/* Defined in FC-LS */ 3144static const struct { 3145 int code; 3146 int retry; 3147 int logged_in; 3148} prli_rsp [] = { 3149 { 0, 1, 0 }, 3150 { 1, 0, 1 }, 3151 { 2, 1, 0 }, 3152 { 3, 1, 0 }, 3153 { 4, 0, 0 }, 3154 { 5, 0, 0 }, 3155 { 6, 0, 1 }, 3156 { 7, 0, 0 }, 3157 { 8, 1, 0 }, 3158}; 3159 3160/** 3161 * ibmvfc_get_prli_rsp - Find PRLI response index 3162 * @flags: PRLI response flags 3163 * 3164 **/ 3165static int ibmvfc_get_prli_rsp(u16 flags) 3166{ 3167 int i; 3168 int code = (flags & 0x0f00) >> 8; 3169 3170 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3171 if (prli_rsp[i].code == code) 3172 return i; 3173 3174 return 0; 3175} 3176 3177/** 3178 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3179 * @evt: ibmvfc event struct 3180 * 3181 **/ 3182static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3183{ 3184 struct ibmvfc_target *tgt = evt->tgt; 3185 struct ibmvfc_host *vhost = evt->vhost; 3186 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3187 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3188 u32 status = rsp->common.status; 3189 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3190 3191 vhost->discovery_threads--; 3192 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3193 switch (status) { 3194 case IBMVFC_MAD_SUCCESS: 3195 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3196 parms->type, parms->flags, parms->service_parms); 3197 3198 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3199 index = ibmvfc_get_prli_rsp(parms->flags); 3200 if (prli_rsp[index].logged_in) { 3201 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) { 3202 tgt->need_login = 0; 3203 tgt->ids.roles = 0; 3204 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC) 3205 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3206 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC) 3207 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3208 tgt->add_rport = 1; 3209 } else 3210 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3211 } else if (prli_rsp[index].retry) 3212 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3213 else 3214 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3215 } else 3216 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3217 break; 3218 case IBMVFC_MAD_DRIVER_FAILED: 3219 break; 3220 case IBMVFC_MAD_CRQ_ERROR: 3221 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3222 break; 3223 case IBMVFC_MAD_FAILED: 3224 default: 3225 if ((rsp->status & IBMVFC_VIOS_FAILURE) && rsp->error == IBMVFC_PLOGI_REQUIRED) 3226 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3227 else if (tgt->logo_rcvd) 3228 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3229 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3230 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3231 else 3232 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3233 3234 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3235 ibmvfc_get_cmd_error(rsp->status, rsp->error), 3236 rsp->status, rsp->error, status); 3237 break; 3238 }; 3239 3240 kref_put(&tgt->kref, ibmvfc_release_tgt); 3241 ibmvfc_free_event(evt); 3242 wake_up(&vhost->work_wait_q); 3243} 3244 3245/** 3246 * ibmvfc_tgt_send_prli - Send a process login 3247 * @tgt: ibmvfc target struct 3248 * 3249 **/ 3250static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3251{ 3252 struct ibmvfc_process_login *prli; 3253 struct ibmvfc_host *vhost = tgt->vhost; 3254 struct ibmvfc_event *evt; 3255 3256 if (vhost->discovery_threads >= disc_threads) 3257 return; 3258 3259 kref_get(&tgt->kref); 3260 evt = ibmvfc_get_event(vhost); 3261 vhost->discovery_threads++; 3262 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 3263 evt->tgt = tgt; 3264 prli = &evt->iu.prli; 3265 memset(prli, 0, sizeof(*prli)); 3266 prli->common.version = 1; 3267 prli->common.opcode = IBMVFC_PROCESS_LOGIN; 3268 prli->common.length = sizeof(*prli); 3269 prli->scsi_id = tgt->scsi_id; 3270 3271 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 3272 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; 3273 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; 3274 3275 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3276 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3277 vhost->discovery_threads--; 3278 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3279 kref_put(&tgt->kref, ibmvfc_release_tgt); 3280 } else 3281 tgt_dbg(tgt, "Sent process login\n"); 3282} 3283 3284/** 3285 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 3286 * @evt: ibmvfc event struct 3287 * 3288 **/ 3289static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 3290{ 3291 struct ibmvfc_target *tgt = evt->tgt; 3292 struct ibmvfc_host *vhost = evt->vhost; 3293 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 3294 u32 status = rsp->common.status; 3295 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3296 3297 vhost->discovery_threads--; 3298 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3299 switch (status) { 3300 case IBMVFC_MAD_SUCCESS: 3301 tgt_dbg(tgt, "Port Login succeeded\n"); 3302 if (tgt->ids.port_name && 3303 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 3304 vhost->reinit = 1; 3305 tgt_dbg(tgt, "Port re-init required\n"); 3306 break; 3307 } 3308 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3309 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3310 tgt->ids.port_id = tgt->scsi_id; 3311 memcpy(&tgt->service_parms, &rsp->service_parms, 3312 sizeof(tgt->service_parms)); 3313 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3314 sizeof(tgt->service_parms_change)); 3315 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3316 break; 3317 case IBMVFC_MAD_DRIVER_FAILED: 3318 break; 3319 case IBMVFC_MAD_CRQ_ERROR: 3320 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3321 break; 3322 case IBMVFC_MAD_FAILED: 3323 default: 3324 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3325 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3326 else 3327 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3328 3329 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3330 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3331 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3332 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); 3333 break; 3334 }; 3335 3336 kref_put(&tgt->kref, ibmvfc_release_tgt); 3337 ibmvfc_free_event(evt); 3338 wake_up(&vhost->work_wait_q); 3339} 3340 3341/** 3342 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3343 * @tgt: ibmvfc target struct 3344 * 3345 **/ 3346static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3347{ 3348 struct ibmvfc_port_login *plogi; 3349 struct ibmvfc_host *vhost = tgt->vhost; 3350 struct ibmvfc_event *evt; 3351 3352 if (vhost->discovery_threads >= disc_threads) 3353 return; 3354 3355 kref_get(&tgt->kref); 3356 tgt->logo_rcvd = 0; 3357 evt = ibmvfc_get_event(vhost); 3358 vhost->discovery_threads++; 3359 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3360 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3361 evt->tgt = tgt; 3362 plogi = &evt->iu.plogi; 3363 memset(plogi, 0, sizeof(*plogi)); 3364 plogi->common.version = 1; 3365 plogi->common.opcode = IBMVFC_PORT_LOGIN; 3366 plogi->common.length = sizeof(*plogi); 3367 plogi->scsi_id = tgt->scsi_id; 3368 3369 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3370 vhost->discovery_threads--; 3371 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3372 kref_put(&tgt->kref, ibmvfc_release_tgt); 3373 } else 3374 tgt_dbg(tgt, "Sent port login\n"); 3375} 3376 3377/** 3378 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3379 * @evt: ibmvfc event struct 3380 * 3381 **/ 3382static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3383{ 3384 struct ibmvfc_target *tgt = evt->tgt; 3385 struct ibmvfc_host *vhost = evt->vhost; 3386 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3387 u32 status = rsp->common.status; 3388 3389 vhost->discovery_threads--; 3390 ibmvfc_free_event(evt); 3391 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3392 3393 switch (status) { 3394 case IBMVFC_MAD_SUCCESS: 3395 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3396 break; 3397 case IBMVFC_MAD_DRIVER_FAILED: 3398 kref_put(&tgt->kref, ibmvfc_release_tgt); 3399 wake_up(&vhost->work_wait_q); 3400 return; 3401 case IBMVFC_MAD_FAILED: 3402 default: 3403 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3404 break; 3405 }; 3406 3407 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3408 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3409 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3410 tgt->scsi_id != tgt->new_scsi_id) 3411 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3412 kref_put(&tgt->kref, ibmvfc_release_tgt); 3413 wake_up(&vhost->work_wait_q); 3414} 3415 3416/** 3417 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3418 * @tgt: ibmvfc target struct 3419 * 3420 **/ 3421static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3422{ 3423 struct ibmvfc_implicit_logout *mad; 3424 struct ibmvfc_host *vhost = tgt->vhost; 3425 struct ibmvfc_event *evt; 3426 3427 if (vhost->discovery_threads >= disc_threads) 3428 return; 3429 3430 kref_get(&tgt->kref); 3431 evt = ibmvfc_get_event(vhost); 3432 vhost->discovery_threads++; 3433 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3434 evt->tgt = tgt; 3435 mad = &evt->iu.implicit_logout; 3436 memset(mad, 0, sizeof(*mad)); 3437 mad->common.version = 1; 3438 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; 3439 mad->common.length = sizeof(*mad); 3440 mad->old_scsi_id = tgt->scsi_id; 3441 3442 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3443 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3444 vhost->discovery_threads--; 3445 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3446 kref_put(&tgt->kref, ibmvfc_release_tgt); 3447 } else 3448 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3449} 3450 3451/** 3452 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3453 * @mad: ibmvfc passthru mad struct 3454 * @tgt: ibmvfc target struct 3455 * 3456 * Returns: 3457 * 1 if PLOGI needed / 0 if PLOGI not needed 3458 **/ 3459static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3460 struct ibmvfc_target *tgt) 3461{ 3462 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3463 sizeof(tgt->ids.port_name))) 3464 return 1; 3465 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3466 sizeof(tgt->ids.node_name))) 3467 return 1; 3468 if (mad->fc_iu.response[6] != tgt->scsi_id) 3469 return 1; 3470 return 0; 3471} 3472 3473/** 3474 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3475 * @evt: ibmvfc event struct 3476 * 3477 **/ 3478static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3479{ 3480 struct ibmvfc_target *tgt = evt->tgt; 3481 struct ibmvfc_host *vhost = evt->vhost; 3482 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3483 u32 status = mad->common.status; 3484 u8 fc_reason, fc_explain; 3485 3486 vhost->discovery_threads--; 3487 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3488 del_timer(&tgt->timer); 3489 3490 switch (status) { 3491 case IBMVFC_MAD_SUCCESS: 3492 tgt_dbg(tgt, "ADISC succeeded\n"); 3493 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3494 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3495 break; 3496 case IBMVFC_MAD_DRIVER_FAILED: 3497 break; 3498 case IBMVFC_MAD_FAILED: 3499 default: 3500 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3501 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; 3502 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; 3503 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3504 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), 3505 mad->iu.status, mad->iu.error, 3506 ibmvfc_get_fc_type(fc_reason), fc_reason, 3507 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3508 break; 3509 }; 3510 3511 kref_put(&tgt->kref, ibmvfc_release_tgt); 3512 ibmvfc_free_event(evt); 3513 wake_up(&vhost->work_wait_q); 3514} 3515 3516/** 3517 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3518 * @evt: ibmvfc event struct 3519 * 3520 **/ 3521static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3522{ 3523 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3524 3525 memset(mad, 0, sizeof(*mad)); 3526 mad->common.version = 1; 3527 mad->common.opcode = IBMVFC_PASSTHRU; 3528 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 3529 mad->cmd_ioba.va = (u64)evt->crq.ioba + 3530 offsetof(struct ibmvfc_passthru_mad, iu); 3531 mad->cmd_ioba.len = sizeof(mad->iu); 3532 mad->iu.cmd_len = sizeof(mad->fc_iu.payload); 3533 mad->iu.rsp_len = sizeof(mad->fc_iu.response); 3534 mad->iu.cmd.va = (u64)evt->crq.ioba + 3535 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3536 offsetof(struct ibmvfc_passthru_fc_iu, payload); 3537 mad->iu.cmd.len = sizeof(mad->fc_iu.payload); 3538 mad->iu.rsp.va = (u64)evt->crq.ioba + 3539 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3540 offsetof(struct ibmvfc_passthru_fc_iu, response); 3541 mad->iu.rsp.len = sizeof(mad->fc_iu.response); 3542} 3543 3544/** 3545 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3546 * @evt: ibmvfc event struct 3547 * 3548 * Just cleanup this event struct. Everything else is handled by 3549 * the ADISC completion handler. If the ADISC never actually comes 3550 * back, we still have the timer running on the ADISC event struct 3551 * which will fire and cause the CRQ to get reset. 3552 * 3553 **/ 3554static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3555{ 3556 struct ibmvfc_host *vhost = evt->vhost; 3557 struct ibmvfc_target *tgt = evt->tgt; 3558 3559 tgt_dbg(tgt, "ADISC cancel complete\n"); 3560 vhost->abort_threads--; 3561 ibmvfc_free_event(evt); 3562 kref_put(&tgt->kref, ibmvfc_release_tgt); 3563 wake_up(&vhost->work_wait_q); 3564} 3565 3566/** 3567 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3568 * @tgt: ibmvfc target struct 3569 * 3570 * If an ADISC times out, send a cancel. If the cancel times 3571 * out, reset the CRQ. When the ADISC comes back as cancelled, 3572 * log back into the target. 3573 **/ 3574static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) 3575{ 3576 struct ibmvfc_host *vhost = tgt->vhost; 3577 struct ibmvfc_event *evt; 3578 struct ibmvfc_tmf *tmf; 3579 unsigned long flags; 3580 int rc; 3581 3582 tgt_dbg(tgt, "ADISC timeout\n"); 3583 spin_lock_irqsave(vhost->host->host_lock, flags); 3584 if (vhost->abort_threads >= disc_threads || 3585 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3586 vhost->state != IBMVFC_INITIALIZING || 3587 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3588 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3589 return; 3590 } 3591 3592 vhost->abort_threads++; 3593 kref_get(&tgt->kref); 3594 evt = ibmvfc_get_event(vhost); 3595 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3596 3597 evt->tgt = tgt; 3598 tmf = &evt->iu.tmf; 3599 memset(tmf, 0, sizeof(*tmf)); 3600 tmf->common.version = 1; 3601 tmf->common.opcode = IBMVFC_TMF_MAD; 3602 tmf->common.length = sizeof(*tmf); 3603 tmf->scsi_id = tgt->scsi_id; 3604 tmf->cancel_key = tgt->cancel_key; 3605 3606 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3607 3608 if (rc) { 3609 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3610 vhost->abort_threads--; 3611 kref_put(&tgt->kref, ibmvfc_release_tgt); 3612 __ibmvfc_reset_host(vhost); 3613 } else 3614 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3615 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3616} 3617 3618/** 3619 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3620 * @tgt: ibmvfc target struct 3621 * 3622 * When sending an ADISC we end up with two timers running. The 3623 * first timer is the timer in the ibmvfc target struct. If this 3624 * fires, we send a cancel to the target. The second timer is the 3625 * timer on the ibmvfc event for the ADISC, which is longer. If that 3626 * fires, it means the ADISC timed out and our attempt to cancel it 3627 * also failed, so we need to reset the CRQ. 3628 **/ 3629static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3630{ 3631 struct ibmvfc_passthru_mad *mad; 3632 struct ibmvfc_host *vhost = tgt->vhost; 3633 struct ibmvfc_event *evt; 3634 3635 if (vhost->discovery_threads >= disc_threads) 3636 return; 3637 3638 kref_get(&tgt->kref); 3639 evt = ibmvfc_get_event(vhost); 3640 vhost->discovery_threads++; 3641 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3642 evt->tgt = tgt; 3643 3644 ibmvfc_init_passthru(evt); 3645 mad = &evt->iu.passthru; 3646 mad->iu.flags = IBMVFC_FC_ELS; 3647 mad->iu.scsi_id = tgt->scsi_id; 3648 mad->iu.cancel_key = tgt->cancel_key; 3649 3650 mad->fc_iu.payload[0] = IBMVFC_ADISC; 3651 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3652 sizeof(vhost->login_buf->resp.port_name)); 3653 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3654 sizeof(vhost->login_buf->resp.node_name)); 3655 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; 3656 3657 if (timer_pending(&tgt->timer)) 3658 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3659 else { 3660 tgt->timer.data = (unsigned long) tgt; 3661 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3662 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; 3663 add_timer(&tgt->timer); 3664 } 3665 3666 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3667 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3668 vhost->discovery_threads--; 3669 del_timer(&tgt->timer); 3670 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3671 kref_put(&tgt->kref, ibmvfc_release_tgt); 3672 } else 3673 tgt_dbg(tgt, "Sent ADISC\n"); 3674} 3675 3676/** 3677 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3678 * @evt: ibmvfc event struct 3679 * 3680 **/ 3681static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3682{ 3683 struct ibmvfc_target *tgt = evt->tgt; 3684 struct ibmvfc_host *vhost = evt->vhost; 3685 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3686 u32 status = rsp->common.status; 3687 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3688 3689 vhost->discovery_threads--; 3690 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3691 switch (status) { 3692 case IBMVFC_MAD_SUCCESS: 3693 tgt_dbg(tgt, "Query Target succeeded\n"); 3694 tgt->new_scsi_id = rsp->scsi_id; 3695 if (rsp->scsi_id != tgt->scsi_id) 3696 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3697 else 3698 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3699 break; 3700 case IBMVFC_MAD_DRIVER_FAILED: 3701 break; 3702 case IBMVFC_MAD_CRQ_ERROR: 3703 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3704 break; 3705 case IBMVFC_MAD_FAILED: 3706 default: 3707 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3708 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && 3709 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) 3710 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3711 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3712 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3713 else 3714 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3715 3716 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3717 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3718 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3719 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); 3720 break; 3721 }; 3722 3723 kref_put(&tgt->kref, ibmvfc_release_tgt); 3724 ibmvfc_free_event(evt); 3725 wake_up(&vhost->work_wait_q); 3726} 3727 3728/** 3729 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3730 * @tgt: ibmvfc target struct 3731 * 3732 **/ 3733static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3734{ 3735 struct ibmvfc_query_tgt *query_tgt; 3736 struct ibmvfc_host *vhost = tgt->vhost; 3737 struct ibmvfc_event *evt; 3738 3739 if (vhost->discovery_threads >= disc_threads) 3740 return; 3741 3742 kref_get(&tgt->kref); 3743 evt = ibmvfc_get_event(vhost); 3744 vhost->discovery_threads++; 3745 evt->tgt = tgt; 3746 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3747 query_tgt = &evt->iu.query_tgt; 3748 memset(query_tgt, 0, sizeof(*query_tgt)); 3749 query_tgt->common.version = 1; 3750 query_tgt->common.opcode = IBMVFC_QUERY_TARGET; 3751 query_tgt->common.length = sizeof(*query_tgt); 3752 query_tgt->wwpn = tgt->ids.port_name; 3753 3754 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3755 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3756 vhost->discovery_threads--; 3757 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3758 kref_put(&tgt->kref, ibmvfc_release_tgt); 3759 } else 3760 tgt_dbg(tgt, "Sent Query Target\n"); 3761} 3762 3763/** 3764 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3765 * @vhost: ibmvfc host struct 3766 * @scsi_id: SCSI ID to allocate target for 3767 * 3768 * Returns: 3769 * 0 on success / other on failure 3770 **/ 3771static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3772{ 3773 struct ibmvfc_target *tgt; 3774 unsigned long flags; 3775 3776 spin_lock_irqsave(vhost->host->host_lock, flags); 3777 list_for_each_entry(tgt, &vhost->targets, queue) { 3778 if (tgt->scsi_id == scsi_id) { 3779 if (tgt->need_login) 3780 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3781 goto unlock_out; 3782 } 3783 } 3784 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3785 3786 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3787 if (!tgt) { 3788 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", 3789 scsi_id); 3790 return -ENOMEM; 3791 } 3792 3793 memset(tgt, 0, sizeof(*tgt)); 3794 tgt->scsi_id = scsi_id; 3795 tgt->new_scsi_id = scsi_id; 3796 tgt->vhost = vhost; 3797 tgt->need_login = 1; 3798 tgt->cancel_key = vhost->task_set++; 3799 init_timer(&tgt->timer); 3800 kref_init(&tgt->kref); 3801 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3802 spin_lock_irqsave(vhost->host->host_lock, flags); 3803 list_add_tail(&tgt->queue, &vhost->targets); 3804 3805unlock_out: 3806 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3807 return 0; 3808} 3809 3810/** 3811 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3812 * @vhost: ibmvfc host struct 3813 * 3814 * Returns: 3815 * 0 on success / other on failure 3816 **/ 3817static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3818{ 3819 int i, rc; 3820 3821 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3822 rc = ibmvfc_alloc_target(vhost, 3823 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); 3824 3825 return rc; 3826} 3827 3828/** 3829 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3830 * @evt: ibmvfc event struct 3831 * 3832 **/ 3833static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3834{ 3835 struct ibmvfc_host *vhost = evt->vhost; 3836 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3837 u32 mad_status = rsp->common.status; 3838 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3839 3840 switch (mad_status) { 3841 case IBMVFC_MAD_SUCCESS: 3842 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3843 vhost->num_targets = rsp->num_written; 3844 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3845 break; 3846 case IBMVFC_MAD_FAILED: 3847 level += ibmvfc_retry_host_init(vhost); 3848 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 3849 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3850 break; 3851 case IBMVFC_MAD_DRIVER_FAILED: 3852 break; 3853 default: 3854 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3855 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3856 break; 3857 } 3858 3859 ibmvfc_free_event(evt); 3860 wake_up(&vhost->work_wait_q); 3861} 3862 3863/** 3864 * ibmvfc_discover_targets - Send Discover Targets MAD 3865 * @vhost: ibmvfc host struct 3866 * 3867 **/ 3868static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3869{ 3870 struct ibmvfc_discover_targets *mad; 3871 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3872 3873 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3874 mad = &evt->iu.discover_targets; 3875 memset(mad, 0, sizeof(*mad)); 3876 mad->common.version = 1; 3877 mad->common.opcode = IBMVFC_DISC_TARGETS; 3878 mad->common.length = sizeof(*mad); 3879 mad->bufflen = vhost->disc_buf_sz; 3880 mad->buffer.va = vhost->disc_buf_dma; 3881 mad->buffer.len = vhost->disc_buf_sz; 3882 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3883 3884 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3885 ibmvfc_dbg(vhost, "Sent discover targets\n"); 3886 else 3887 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3888} 3889 3890/** 3891 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 3892 * @evt: ibmvfc event struct 3893 * 3894 **/ 3895static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 3896{ 3897 struct ibmvfc_host *vhost = evt->vhost; 3898 u32 mad_status = evt->xfer_iu->npiv_login.common.status; 3899 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 3900 unsigned int npiv_max_sectors; 3901 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3902 3903 switch (mad_status) { 3904 case IBMVFC_MAD_SUCCESS: 3905 ibmvfc_free_event(evt); 3906 break; 3907 case IBMVFC_MAD_FAILED: 3908 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3909 level += ibmvfc_retry_host_init(vhost); 3910 else 3911 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3912 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 3913 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3914 ibmvfc_free_event(evt); 3915 return; 3916 case IBMVFC_MAD_CRQ_ERROR: 3917 ibmvfc_retry_host_init(vhost); 3918 case IBMVFC_MAD_DRIVER_FAILED: 3919 ibmvfc_free_event(evt); 3920 return; 3921 default: 3922 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 3923 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3924 ibmvfc_free_event(evt); 3925 return; 3926 } 3927 3928 vhost->client_migrated = 0; 3929 3930 if (!(rsp->flags & IBMVFC_NATIVE_FC)) { 3931 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 3932 rsp->flags); 3933 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3934 wake_up(&vhost->work_wait_q); 3935 return; 3936 } 3937 3938 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { 3939 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 3940 rsp->max_cmds); 3941 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3942 wake_up(&vhost->work_wait_q); 3943 return; 3944 } 3945 3946 vhost->logged_in = 1; 3947 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); 3948 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 3949 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 3950 rsp->drc_name, npiv_max_sectors); 3951 3952 fc_host_fabric_name(vhost->host) = rsp->node_name; 3953 fc_host_node_name(vhost->host) = rsp->node_name; 3954 fc_host_port_name(vhost->host) = rsp->port_name; 3955 fc_host_port_id(vhost->host) = rsp->scsi_id; 3956 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 3957 fc_host_supported_classes(vhost->host) = 0; 3958 if (rsp->service_parms.class1_parms[0] & 0x80000000) 3959 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 3960 if (rsp->service_parms.class2_parms[0] & 0x80000000) 3961 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 3962 if (rsp->service_parms.class3_parms[0] & 0x80000000) 3963 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 3964 fc_host_maxframe_size(vhost->host) = 3965 rsp->service_parms.common.bb_rcv_sz & 0x0fff; 3966 3967 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; 3968 vhost->host->max_sectors = npiv_max_sectors; 3969 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 3970 wake_up(&vhost->work_wait_q); 3971} 3972 3973/** 3974 * ibmvfc_npiv_login - Sends NPIV login 3975 * @vhost: ibmvfc host struct 3976 * 3977 **/ 3978static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 3979{ 3980 struct ibmvfc_npiv_login_mad *mad; 3981 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3982 3983 ibmvfc_gather_partition_info(vhost); 3984 ibmvfc_set_login_info(vhost); 3985 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 3986 3987 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 3988 mad = &evt->iu.npiv_login; 3989 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 3990 mad->common.version = 1; 3991 mad->common.opcode = IBMVFC_NPIV_LOGIN; 3992 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); 3993 mad->buffer.va = vhost->login_buf_dma; 3994 mad->buffer.len = sizeof(*vhost->login_buf); 3995 3996 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3997 3998 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3999 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 4000 else 4001 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4002}; 4003 4004/** 4005 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 4006 * @vhost: ibmvfc host struct 4007 * 4008 **/ 4009static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 4010{ 4011 struct ibmvfc_host *vhost = evt->vhost; 4012 u32 mad_status = evt->xfer_iu->npiv_logout.common.status; 4013 4014 ibmvfc_free_event(evt); 4015 4016 switch (mad_status) { 4017 case IBMVFC_MAD_SUCCESS: 4018 if (list_empty(&vhost->sent) && 4019 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 4020 ibmvfc_init_host(vhost); 4021 return; 4022 } 4023 break; 4024 case IBMVFC_MAD_FAILED: 4025 case IBMVFC_MAD_NOT_SUPPORTED: 4026 case IBMVFC_MAD_CRQ_ERROR: 4027 case IBMVFC_MAD_DRIVER_FAILED: 4028 default: 4029 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 4030 break; 4031 } 4032 4033 ibmvfc_hard_reset_host(vhost); 4034} 4035 4036/** 4037 * ibmvfc_npiv_logout - Issue an NPIV Logout 4038 * @vhost: ibmvfc host struct 4039 * 4040 **/ 4041static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 4042{ 4043 struct ibmvfc_npiv_logout_mad *mad; 4044 struct ibmvfc_event *evt; 4045 4046 evt = ibmvfc_get_event(vhost); 4047 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 4048 4049 mad = &evt->iu.npiv_logout; 4050 memset(mad, 0, sizeof(*mad)); 4051 mad->common.version = 1; 4052 mad->common.opcode = IBMVFC_NPIV_LOGOUT; 4053 mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad); 4054 4055 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 4056 4057 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4058 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 4059 else 4060 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4061} 4062 4063/** 4064 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 4065 * @vhost: ibmvfc host struct 4066 * 4067 * Returns: 4068 * 1 if work to do / 0 if not 4069 **/ 4070static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 4071{ 4072 struct ibmvfc_target *tgt; 4073 4074 list_for_each_entry(tgt, &vhost->targets, queue) { 4075 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 4076 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4077 return 1; 4078 } 4079 4080 return 0; 4081} 4082 4083/** 4084 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 4085 * @vhost: ibmvfc host struct 4086 * 4087 * Returns: 4088 * 1 if work to do / 0 if not 4089 **/ 4090static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4091{ 4092 struct ibmvfc_target *tgt; 4093 4094 if (kthread_should_stop()) 4095 return 1; 4096 switch (vhost->action) { 4097 case IBMVFC_HOST_ACTION_NONE: 4098 case IBMVFC_HOST_ACTION_INIT_WAIT: 4099 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4100 return 0; 4101 case IBMVFC_HOST_ACTION_TGT_INIT: 4102 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4103 if (vhost->discovery_threads == disc_threads) 4104 return 0; 4105 list_for_each_entry(tgt, &vhost->targets, queue) 4106 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 4107 return 1; 4108 list_for_each_entry(tgt, &vhost->targets, queue) 4109 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4110 return 0; 4111 return 1; 4112 case IBMVFC_HOST_ACTION_LOGO: 4113 case IBMVFC_HOST_ACTION_INIT: 4114 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4115 case IBMVFC_HOST_ACTION_TGT_DEL: 4116 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4117 case IBMVFC_HOST_ACTION_QUERY: 4118 default: 4119 break; 4120 }; 4121 4122 return 1; 4123} 4124 4125/** 4126 * ibmvfc_work_to_do - Is there task level work to do? 4127 * @vhost: ibmvfc host struct 4128 * 4129 * Returns: 4130 * 1 if work to do / 0 if not 4131 **/ 4132static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4133{ 4134 unsigned long flags; 4135 int rc; 4136 4137 spin_lock_irqsave(vhost->host->host_lock, flags); 4138 rc = __ibmvfc_work_to_do(vhost); 4139 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4140 return rc; 4141} 4142 4143/** 4144 * ibmvfc_log_ae - Log async events if necessary 4145 * @vhost: ibmvfc host struct 4146 * @events: events to log 4147 * 4148 **/ 4149static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 4150{ 4151 if (events & IBMVFC_AE_RSCN) 4152 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 4153 if ((events & IBMVFC_AE_LINKDOWN) && 4154 vhost->state >= IBMVFC_HALTED) 4155 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 4156 if ((events & IBMVFC_AE_LINKUP) && 4157 vhost->state == IBMVFC_INITIALIZING) 4158 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 4159} 4160 4161/** 4162 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 4163 * @tgt: ibmvfc target struct 4164 * 4165 **/ 4166static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 4167{ 4168 struct ibmvfc_host *vhost = tgt->vhost; 4169 struct fc_rport *rport; 4170 unsigned long flags; 4171 4172 tgt_dbg(tgt, "Adding rport\n"); 4173 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 4174 spin_lock_irqsave(vhost->host->host_lock, flags); 4175 4176 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4177 tgt_dbg(tgt, "Deleting rport\n"); 4178 list_del(&tgt->queue); 4179 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4180 fc_remote_port_delete(rport); 4181 del_timer_sync(&tgt->timer); 4182 kref_put(&tgt->kref, ibmvfc_release_tgt); 4183 return; 4184 } 4185 4186 if (rport) { 4187 tgt_dbg(tgt, "rport add succeeded\n"); 4188 tgt->rport = rport; 4189 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; 4190 rport->supported_classes = 0; 4191 tgt->target_id = rport->scsi_target_id; 4192 if (tgt->service_parms.class1_parms[0] & 0x80000000) 4193 rport->supported_classes |= FC_COS_CLASS1; 4194 if (tgt->service_parms.class2_parms[0] & 0x80000000) 4195 rport->supported_classes |= FC_COS_CLASS2; 4196 if (tgt->service_parms.class3_parms[0] & 0x80000000) 4197 rport->supported_classes |= FC_COS_CLASS3; 4198 if (rport->rqst_q) 4199 blk_queue_max_segments(rport->rqst_q, 1); 4200 } else 4201 tgt_dbg(tgt, "rport add failed\n"); 4202 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4203} 4204 4205/** 4206 * ibmvfc_do_work - Do task level work 4207 * @vhost: ibmvfc host struct 4208 * 4209 **/ 4210static void ibmvfc_do_work(struct ibmvfc_host *vhost) 4211{ 4212 struct ibmvfc_target *tgt; 4213 unsigned long flags; 4214 struct fc_rport *rport; 4215 4216 ibmvfc_log_ae(vhost, vhost->events_to_log); 4217 spin_lock_irqsave(vhost->host->host_lock, flags); 4218 vhost->events_to_log = 0; 4219 switch (vhost->action) { 4220 case IBMVFC_HOST_ACTION_NONE: 4221 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4222 case IBMVFC_HOST_ACTION_INIT_WAIT: 4223 break; 4224 case IBMVFC_HOST_ACTION_LOGO: 4225 vhost->job_step(vhost); 4226 break; 4227 case IBMVFC_HOST_ACTION_INIT: 4228 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 4229 if (vhost->delay_init) { 4230 vhost->delay_init = 0; 4231 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4232 ssleep(15); 4233 return; 4234 } else 4235 vhost->job_step(vhost); 4236 break; 4237 case IBMVFC_HOST_ACTION_QUERY: 4238 list_for_each_entry(tgt, &vhost->targets, queue) 4239 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 4240 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 4241 break; 4242 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4243 list_for_each_entry(tgt, &vhost->targets, queue) { 4244 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4245 tgt->job_step(tgt); 4246 break; 4247 } 4248 } 4249 4250 if (!ibmvfc_dev_init_to_do(vhost)) 4251 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 4252 break; 4253 case IBMVFC_HOST_ACTION_TGT_DEL: 4254 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4255 list_for_each_entry(tgt, &vhost->targets, queue) { 4256 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4257 tgt_dbg(tgt, "Deleting rport\n"); 4258 rport = tgt->rport; 4259 tgt->rport = NULL; 4260 list_del(&tgt->queue); 4261 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4262 if (rport) 4263 fc_remote_port_delete(rport); 4264 del_timer_sync(&tgt->timer); 4265 kref_put(&tgt->kref, ibmvfc_release_tgt); 4266 return; 4267 } 4268 } 4269 4270 if (vhost->state == IBMVFC_INITIALIZING) { 4271 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 4272 if (vhost->reinit) { 4273 vhost->reinit = 0; 4274 scsi_block_requests(vhost->host); 4275 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4276 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4277 } else { 4278 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 4279 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4280 wake_up(&vhost->init_wait_q); 4281 schedule_work(&vhost->rport_add_work_q); 4282 vhost->init_retries = 0; 4283 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4284 scsi_unblock_requests(vhost->host); 4285 } 4286 4287 return; 4288 } else { 4289 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 4290 vhost->job_step = ibmvfc_discover_targets; 4291 } 4292 } else { 4293 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4294 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4295 scsi_unblock_requests(vhost->host); 4296 wake_up(&vhost->init_wait_q); 4297 return; 4298 } 4299 break; 4300 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4301 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4302 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4303 ibmvfc_alloc_targets(vhost); 4304 spin_lock_irqsave(vhost->host->host_lock, flags); 4305 break; 4306 case IBMVFC_HOST_ACTION_TGT_INIT: 4307 list_for_each_entry(tgt, &vhost->targets, queue) { 4308 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4309 tgt->job_step(tgt); 4310 break; 4311 } 4312 } 4313 4314 if (!ibmvfc_dev_init_to_do(vhost)) 4315 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4316 break; 4317 default: 4318 break; 4319 }; 4320 4321 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4322} 4323 4324/** 4325 * ibmvfc_work - Do task level work 4326 * @data: ibmvfc host struct 4327 * 4328 * Returns: 4329 * zero 4330 **/ 4331static int ibmvfc_work(void *data) 4332{ 4333 struct ibmvfc_host *vhost = data; 4334 int rc; 4335 4336 set_user_nice(current, -20); 4337 4338 while (1) { 4339 rc = wait_event_interruptible(vhost->work_wait_q, 4340 ibmvfc_work_to_do(vhost)); 4341 4342 BUG_ON(rc); 4343 4344 if (kthread_should_stop()) 4345 break; 4346 4347 ibmvfc_do_work(vhost); 4348 } 4349 4350 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4351 return 0; 4352} 4353 4354/** 4355 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4356 * @vhost: ibmvfc host struct 4357 * 4358 * Allocates a page for messages, maps it for dma, and registers 4359 * the crq with the hypervisor. 4360 * 4361 * Return value: 4362 * zero on success / other on failure 4363 **/ 4364static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4365{ 4366 int rc, retrc = -ENOMEM; 4367 struct device *dev = vhost->dev; 4368 struct vio_dev *vdev = to_vio_dev(dev); 4369 struct ibmvfc_crq_queue *crq = &vhost->crq; 4370 4371 ENTER; 4372 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4373 4374 if (!crq->msgs) 4375 return -ENOMEM; 4376 4377 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4378 crq->msg_token = dma_map_single(dev, crq->msgs, 4379 PAGE_SIZE, DMA_BIDIRECTIONAL); 4380 4381 if (dma_mapping_error(dev, crq->msg_token)) 4382 goto map_failed; 4383 4384 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4385 crq->msg_token, PAGE_SIZE); 4386 4387 if (rc == H_RESOURCE) 4388 /* maybe kexecing and resource is busy. try a reset */ 4389 retrc = rc = ibmvfc_reset_crq(vhost); 4390 4391 if (rc == H_CLOSED) 4392 dev_warn(dev, "Partner adapter not ready\n"); 4393 else if (rc) { 4394 dev_warn(dev, "Error %d opening adapter\n", rc); 4395 goto reg_crq_failed; 4396 } 4397 4398 retrc = 0; 4399 4400 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4401 4402 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4403 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4404 goto req_irq_failed; 4405 } 4406 4407 if ((rc = vio_enable_interrupts(vdev))) { 4408 dev_err(dev, "Error %d enabling interrupts\n", rc); 4409 goto req_irq_failed; 4410 } 4411 4412 crq->cur = 0; 4413 LEAVE; 4414 return retrc; 4415 4416req_irq_failed: 4417 tasklet_kill(&vhost->tasklet); 4418 do { 4419 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4420 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4421reg_crq_failed: 4422 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4423map_failed: 4424 free_page((unsigned long)crq->msgs); 4425 return retrc; 4426} 4427 4428/** 4429 * ibmvfc_free_mem - Free memory for vhost 4430 * @vhost: ibmvfc host struct 4431 * 4432 * Return value: 4433 * none 4434 **/ 4435static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4436{ 4437 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4438 4439 ENTER; 4440 mempool_destroy(vhost->tgt_pool); 4441 kfree(vhost->trace); 4442 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4443 vhost->disc_buf_dma); 4444 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4445 vhost->login_buf, vhost->login_buf_dma); 4446 dma_pool_destroy(vhost->sg_pool); 4447 dma_unmap_single(vhost->dev, async_q->msg_token, 4448 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4449 free_page((unsigned long)async_q->msgs); 4450 LEAVE; 4451} 4452 4453/** 4454 * ibmvfc_alloc_mem - Allocate memory for vhost 4455 * @vhost: ibmvfc host struct 4456 * 4457 * Return value: 4458 * 0 on success / non-zero on failure 4459 **/ 4460static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4461{ 4462 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4463 struct device *dev = vhost->dev; 4464 4465 ENTER; 4466 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4467 if (!async_q->msgs) { 4468 dev_err(dev, "Couldn't allocate async queue.\n"); 4469 goto nomem; 4470 } 4471 4472 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4473 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4474 async_q->size * sizeof(*async_q->msgs), 4475 DMA_BIDIRECTIONAL); 4476 4477 if (dma_mapping_error(dev, async_q->msg_token)) { 4478 dev_err(dev, "Failed to map async queue\n"); 4479 goto free_async_crq; 4480 } 4481 4482 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4483 SG_ALL * sizeof(struct srp_direct_buf), 4484 sizeof(struct srp_direct_buf), 0); 4485 4486 if (!vhost->sg_pool) { 4487 dev_err(dev, "Failed to allocate sg pool\n"); 4488 goto unmap_async_crq; 4489 } 4490 4491 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4492 &vhost->login_buf_dma, GFP_KERNEL); 4493 4494 if (!vhost->login_buf) { 4495 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4496 goto free_sg_pool; 4497 } 4498 4499 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4500 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4501 &vhost->disc_buf_dma, GFP_KERNEL); 4502 4503 if (!vhost->disc_buf) { 4504 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4505 goto free_login_buffer; 4506 } 4507 4508 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4509 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4510 4511 if (!vhost->trace) 4512 goto free_disc_buffer; 4513 4514 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4515 sizeof(struct ibmvfc_target)); 4516 4517 if (!vhost->tgt_pool) { 4518 dev_err(dev, "Couldn't allocate target memory pool\n"); 4519 goto free_trace; 4520 } 4521 4522 LEAVE; 4523 return 0; 4524 4525free_trace: 4526 kfree(vhost->trace); 4527free_disc_buffer: 4528 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4529 vhost->disc_buf_dma); 4530free_login_buffer: 4531 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4532 vhost->login_buf, vhost->login_buf_dma); 4533free_sg_pool: 4534 dma_pool_destroy(vhost->sg_pool); 4535unmap_async_crq: 4536 dma_unmap_single(dev, async_q->msg_token, 4537 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4538free_async_crq: 4539 free_page((unsigned long)async_q->msgs); 4540nomem: 4541 LEAVE; 4542 return -ENOMEM; 4543} 4544 4545/** 4546 * ibmvfc_rport_add_thread - Worker thread for rport adds 4547 * @work: work struct 4548 * 4549 **/ 4550static void ibmvfc_rport_add_thread(struct work_struct *work) 4551{ 4552 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4553 rport_add_work_q); 4554 struct ibmvfc_target *tgt; 4555 struct fc_rport *rport; 4556 unsigned long flags; 4557 int did_work; 4558 4559 ENTER; 4560 spin_lock_irqsave(vhost->host->host_lock, flags); 4561 do { 4562 did_work = 0; 4563 if (vhost->state != IBMVFC_ACTIVE) 4564 break; 4565 4566 list_for_each_entry(tgt, &vhost->targets, queue) { 4567 if (tgt->add_rport) { 4568 did_work = 1; 4569 tgt->add_rport = 0; 4570 kref_get(&tgt->kref); 4571 rport = tgt->rport; 4572 if (!rport) { 4573 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4574 ibmvfc_tgt_add_rport(tgt); 4575 } else if (get_device(&rport->dev)) { 4576 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4577 tgt_dbg(tgt, "Setting rport roles\n"); 4578 fc_remote_port_rolechg(rport, tgt->ids.roles); 4579 put_device(&rport->dev); 4580 } 4581 4582 kref_put(&tgt->kref, ibmvfc_release_tgt); 4583 spin_lock_irqsave(vhost->host->host_lock, flags); 4584 break; 4585 } 4586 } 4587 } while(did_work); 4588 4589 if (vhost->state == IBMVFC_ACTIVE) 4590 vhost->scan_complete = 1; 4591 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4592 LEAVE; 4593} 4594 4595/** 4596 * ibmvfc_probe - Adapter hot plug add entry point 4597 * @vdev: vio device struct 4598 * @id: vio device id struct 4599 * 4600 * Return value: 4601 * 0 on success / non-zero on failure 4602 **/ 4603static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4604{ 4605 struct ibmvfc_host *vhost; 4606 struct Scsi_Host *shost; 4607 struct device *dev = &vdev->dev; 4608 int rc = -ENOMEM; 4609 4610 ENTER; 4611 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4612 if (!shost) { 4613 dev_err(dev, "Couldn't allocate host data\n"); 4614 goto out; 4615 } 4616 4617 shost->transportt = ibmvfc_transport_template; 4618 shost->can_queue = max_requests; 4619 shost->max_lun = max_lun; 4620 shost->max_id = max_targets; 4621 shost->max_sectors = IBMVFC_MAX_SECTORS; 4622 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4623 shost->unique_id = shost->host_no; 4624 4625 vhost = shost_priv(shost); 4626 INIT_LIST_HEAD(&vhost->sent); 4627 INIT_LIST_HEAD(&vhost->free); 4628 INIT_LIST_HEAD(&vhost->targets); 4629 sprintf(vhost->name, IBMVFC_NAME); 4630 vhost->host = shost; 4631 vhost->dev = dev; 4632 vhost->partition_number = -1; 4633 vhost->log_level = log_level; 4634 vhost->task_set = 1; 4635 strcpy(vhost->partition_name, "UNKNOWN"); 4636 init_waitqueue_head(&vhost->work_wait_q); 4637 init_waitqueue_head(&vhost->init_wait_q); 4638 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4639 mutex_init(&vhost->passthru_mutex); 4640 4641 if ((rc = ibmvfc_alloc_mem(vhost))) 4642 goto free_scsi_host; 4643 4644 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4645 shost->host_no); 4646 4647 if (IS_ERR(vhost->work_thread)) { 4648 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4649 PTR_ERR(vhost->work_thread)); 4650 goto free_host_mem; 4651 } 4652 4653 if ((rc = ibmvfc_init_crq(vhost))) { 4654 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4655 goto kill_kthread; 4656 } 4657 4658 if ((rc = ibmvfc_init_event_pool(vhost))) { 4659 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4660 goto release_crq; 4661 } 4662 4663 if ((rc = scsi_add_host(shost, dev))) 4664 goto release_event_pool; 4665 4666 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4667 &ibmvfc_trace_attr))) { 4668 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4669 goto remove_shost; 4670 } 4671 4672 if (shost_to_fc_host(shost)->rqst_q) 4673 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 4674 dev_set_drvdata(dev, vhost); 4675 spin_lock(&ibmvfc_driver_lock); 4676 list_add_tail(&vhost->queue, &ibmvfc_head); 4677 spin_unlock(&ibmvfc_driver_lock); 4678 4679 ibmvfc_send_crq_init(vhost); 4680 scsi_scan_host(shost); 4681 return 0; 4682 4683remove_shost: 4684 scsi_remove_host(shost); 4685release_event_pool: 4686 ibmvfc_free_event_pool(vhost); 4687release_crq: 4688 ibmvfc_release_crq_queue(vhost); 4689kill_kthread: 4690 kthread_stop(vhost->work_thread); 4691free_host_mem: 4692 ibmvfc_free_mem(vhost); 4693free_scsi_host: 4694 scsi_host_put(shost); 4695out: 4696 LEAVE; 4697 return rc; 4698} 4699 4700/** 4701 * ibmvfc_remove - Adapter hot plug remove entry point 4702 * @vdev: vio device struct 4703 * 4704 * Return value: 4705 * 0 4706 **/ 4707static int ibmvfc_remove(struct vio_dev *vdev) 4708{ 4709 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4710 unsigned long flags; 4711 4712 ENTER; 4713 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4714 4715 spin_lock_irqsave(vhost->host->host_lock, flags); 4716 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4717 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4718 4719 ibmvfc_wait_while_resetting(vhost); 4720 ibmvfc_release_crq_queue(vhost); 4721 kthread_stop(vhost->work_thread); 4722 fc_remove_host(vhost->host); 4723 scsi_remove_host(vhost->host); 4724 4725 spin_lock_irqsave(vhost->host->host_lock, flags); 4726 ibmvfc_purge_requests(vhost, DID_ERROR); 4727 ibmvfc_free_event_pool(vhost); 4728 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4729 4730 ibmvfc_free_mem(vhost); 4731 spin_lock(&ibmvfc_driver_lock); 4732 list_del(&vhost->queue); 4733 spin_unlock(&ibmvfc_driver_lock); 4734 scsi_host_put(vhost->host); 4735 LEAVE; 4736 return 0; 4737} 4738 4739/** 4740 * ibmvfc_resume - Resume from suspend 4741 * @dev: device struct 4742 * 4743 * We may have lost an interrupt across suspend/resume, so kick the 4744 * interrupt handler 4745 * 4746 */ 4747static int ibmvfc_resume(struct device *dev) 4748{ 4749 unsigned long flags; 4750 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 4751 struct vio_dev *vdev = to_vio_dev(dev); 4752 4753 spin_lock_irqsave(vhost->host->host_lock, flags); 4754 vio_disable_interrupts(vdev); 4755 tasklet_schedule(&vhost->tasklet); 4756 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4757 return 0; 4758} 4759 4760/** 4761 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4762 * @vdev: vio device struct 4763 * 4764 * Return value: 4765 * Number of bytes the driver will need to DMA map at the same time in 4766 * order to perform well. 4767 */ 4768static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4769{ 4770 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4771 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4772} 4773 4774static struct vio_device_id ibmvfc_device_table[] __devinitdata = { 4775 {"fcp", "IBM,vfc-client"}, 4776 { "", "" } 4777}; 4778MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4779 4780static struct dev_pm_ops ibmvfc_pm_ops = { 4781 .resume = ibmvfc_resume 4782}; 4783 4784static struct vio_driver ibmvfc_driver = { 4785 .id_table = ibmvfc_device_table, 4786 .probe = ibmvfc_probe, 4787 .remove = ibmvfc_remove, 4788 .get_desired_dma = ibmvfc_get_desired_dma, 4789 .driver = { 4790 .name = IBMVFC_NAME, 4791 .owner = THIS_MODULE, 4792 .pm = &ibmvfc_pm_ops, 4793 } 4794}; 4795 4796static struct fc_function_template ibmvfc_transport_functions = { 4797 .show_host_fabric_name = 1, 4798 .show_host_node_name = 1, 4799 .show_host_port_name = 1, 4800 .show_host_supported_classes = 1, 4801 .show_host_port_type = 1, 4802 .show_host_port_id = 1, 4803 .show_host_maxframe_size = 1, 4804 4805 .get_host_port_state = ibmvfc_get_host_port_state, 4806 .show_host_port_state = 1, 4807 4808 .get_host_speed = ibmvfc_get_host_speed, 4809 .show_host_speed = 1, 4810 4811 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4812 .terminate_rport_io = ibmvfc_terminate_rport_io, 4813 4814 .show_rport_maxframe_size = 1, 4815 .show_rport_supported_classes = 1, 4816 4817 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4818 .show_rport_dev_loss_tmo = 1, 4819 4820 .get_starget_node_name = ibmvfc_get_starget_node_name, 4821 .show_starget_node_name = 1, 4822 4823 .get_starget_port_name = ibmvfc_get_starget_port_name, 4824 .show_starget_port_name = 1, 4825 4826 .get_starget_port_id = ibmvfc_get_starget_port_id, 4827 .show_starget_port_id = 1, 4828 4829 .bsg_request = ibmvfc_bsg_request, 4830 .bsg_timeout = ibmvfc_bsg_timeout, 4831}; 4832 4833/** 4834 * ibmvfc_module_init - Initialize the ibmvfc module 4835 * 4836 * Return value: 4837 * 0 on success / other on failure 4838 **/ 4839static int __init ibmvfc_module_init(void) 4840{ 4841 int rc; 4842 4843 if (!firmware_has_feature(FW_FEATURE_VIO)) 4844 return -ENODEV; 4845 4846 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4847 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4848 4849 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4850 if (!ibmvfc_transport_template) 4851 return -ENOMEM; 4852 4853 rc = vio_register_driver(&ibmvfc_driver); 4854 if (rc) 4855 fc_release_transport(ibmvfc_transport_template); 4856 return rc; 4857} 4858 4859/** 4860 * ibmvfc_module_exit - Teardown the ibmvfc module 4861 * 4862 * Return value: 4863 * nothing 4864 **/ 4865static void __exit ibmvfc_module_exit(void) 4866{ 4867 vio_unregister_driver(&ibmvfc_driver); 4868 fc_release_transport(ibmvfc_transport_template); 4869} 4870 4871module_init(ibmvfc_module_init); 4872module_exit(ibmvfc_module_exit); 4873