ibmvfc.c revision daa142d1773dd3a986f02a8a4da929608d24daaa
1/* 2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 3 * 4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 5 * 6 * Copyright (C) IBM Corporation, 2008 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24#include <linux/module.h> 25#include <linux/moduleparam.h> 26#include <linux/dma-mapping.h> 27#include <linux/dmapool.h> 28#include <linux/delay.h> 29#include <linux/interrupt.h> 30#include <linux/kthread.h> 31#include <linux/slab.h> 32#include <linux/of.h> 33#include <linux/pm.h> 34#include <linux/stringify.h> 35#include <asm/firmware.h> 36#include <asm/irq.h> 37#include <asm/vio.h> 38#include <scsi/scsi.h> 39#include <scsi/scsi_cmnd.h> 40#include <scsi/scsi_host.h> 41#include <scsi/scsi_device.h> 42#include <scsi/scsi_tcq.h> 43#include <scsi/scsi_transport_fc.h> 44#include <scsi/scsi_bsg_fc.h> 45#include "ibmvfc.h" 46 47static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 48static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 49static unsigned int max_lun = IBMVFC_MAX_LUN; 50static unsigned int max_targets = IBMVFC_MAX_TARGETS; 51static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 52static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 53static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO; 54static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 55static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 56static LIST_HEAD(ibmvfc_head); 57static DEFINE_SPINLOCK(ibmvfc_driver_lock); 58static struct scsi_transport_template *ibmvfc_transport_template; 59 60MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 61MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 62MODULE_LICENSE("GPL"); 63MODULE_VERSION(IBMVFC_DRIVER_VERSION); 64 65module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 66MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 67 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 68module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 69MODULE_PARM_DESC(default_timeout, 70 "Default timeout in seconds for initialization and EH commands. " 71 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 72module_param_named(max_requests, max_requests, uint, S_IRUGO); 73MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 74 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 75module_param_named(max_lun, max_lun, uint, S_IRUGO); 76MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 77 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 78module_param_named(max_targets, max_targets, uint, S_IRUGO); 79MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 80 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 81module_param_named(disc_threads, disc_threads, uint, S_IRUGO); 82MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 83 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 84module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 85MODULE_PARM_DESC(debug, "Enable driver debug information. " 86 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 87module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR); 88MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC " 89 "transport should insulate the loss of a remote port. Once this " 90 "value is exceeded, the scsi target is removed. " 91 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]"); 92module_param_named(log_level, log_level, uint, 0); 93MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 94 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 95 96static const struct { 97 u16 status; 98 u16 error; 99 u8 result; 100 u8 retry; 101 int log; 102 char *name; 103} cmd_status [] = { 104 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 105 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 106 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 107 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 108 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 109 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 110 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 111 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 112 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 115 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 116 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 117 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 118 119 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 120 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 121 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 122 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 123 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 124 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 125 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 126 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 127 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 128 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 129 130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 131 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 132 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 133 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 134 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 135 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 136 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 137 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 138 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 139 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 140 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 141 142 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 143}; 144 145static void ibmvfc_npiv_login(struct ibmvfc_host *); 146static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 147static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 148static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 149static void ibmvfc_npiv_logout(struct ibmvfc_host *); 150 151static const char *unknown_error = "unknown error"; 152 153#ifdef CONFIG_SCSI_IBMVFC_TRACE 154/** 155 * ibmvfc_trc_start - Log a start trace entry 156 * @evt: ibmvfc event struct 157 * 158 **/ 159static void ibmvfc_trc_start(struct ibmvfc_event *evt) 160{ 161 struct ibmvfc_host *vhost = evt->vhost; 162 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 163 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 164 struct ibmvfc_trace_entry *entry; 165 166 entry = &vhost->trace[vhost->trace_index++]; 167 entry->evt = evt; 168 entry->time = jiffies; 169 entry->fmt = evt->crq.format; 170 entry->type = IBMVFC_TRC_START; 171 172 switch (entry->fmt) { 173 case IBMVFC_CMD_FORMAT: 174 entry->op_code = vfc_cmd->iu.cdb[0]; 175 entry->scsi_id = vfc_cmd->tgt_scsi_id; 176 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 177 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 178 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; 179 break; 180 case IBMVFC_MAD_FORMAT: 181 entry->op_code = mad->opcode; 182 break; 183 default: 184 break; 185 }; 186} 187 188/** 189 * ibmvfc_trc_end - Log an end trace entry 190 * @evt: ibmvfc event struct 191 * 192 **/ 193static void ibmvfc_trc_end(struct ibmvfc_event *evt) 194{ 195 struct ibmvfc_host *vhost = evt->vhost; 196 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 197 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 198 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; 199 200 entry->evt = evt; 201 entry->time = jiffies; 202 entry->fmt = evt->crq.format; 203 entry->type = IBMVFC_TRC_END; 204 205 switch (entry->fmt) { 206 case IBMVFC_CMD_FORMAT: 207 entry->op_code = vfc_cmd->iu.cdb[0]; 208 entry->scsi_id = vfc_cmd->tgt_scsi_id; 209 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 210 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 211 entry->u.end.status = vfc_cmd->status; 212 entry->u.end.error = vfc_cmd->error; 213 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; 214 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; 215 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; 216 break; 217 case IBMVFC_MAD_FORMAT: 218 entry->op_code = mad->opcode; 219 entry->u.end.status = mad->status; 220 break; 221 default: 222 break; 223 224 }; 225} 226 227#else 228#define ibmvfc_trc_start(evt) do { } while (0) 229#define ibmvfc_trc_end(evt) do { } while (0) 230#endif 231 232/** 233 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 234 * @status: status / error class 235 * @error: error 236 * 237 * Return value: 238 * index into cmd_status / -EINVAL on failure 239 **/ 240static int ibmvfc_get_err_index(u16 status, u16 error) 241{ 242 int i; 243 244 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 245 if ((cmd_status[i].status & status) == cmd_status[i].status && 246 cmd_status[i].error == error) 247 return i; 248 249 return -EINVAL; 250} 251 252/** 253 * ibmvfc_get_cmd_error - Find the error description for the fcp response 254 * @status: status / error class 255 * @error: error 256 * 257 * Return value: 258 * error description string 259 **/ 260static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 261{ 262 int rc = ibmvfc_get_err_index(status, error); 263 if (rc >= 0) 264 return cmd_status[rc].name; 265 return unknown_error; 266} 267 268/** 269 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 270 * @vfc_cmd: ibmvfc command struct 271 * 272 * Return value: 273 * SCSI result value to return for completed command 274 **/ 275static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) 276{ 277 int err; 278 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 279 int fc_rsp_len = rsp->fcp_rsp_len; 280 281 if ((rsp->flags & FCP_RSP_LEN_VALID) && 282 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 283 rsp->data.info.rsp_code)) 284 return DID_ERROR << 16; 285 286 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 287 if (err >= 0) 288 return rsp->scsi_status | (cmd_status[err].result << 16); 289 return rsp->scsi_status | (DID_ERROR << 16); 290} 291 292/** 293 * ibmvfc_retry_cmd - Determine if error status is retryable 294 * @status: status / error class 295 * @error: error 296 * 297 * Return value: 298 * 1 if error should be retried / 0 if it should not 299 **/ 300static int ibmvfc_retry_cmd(u16 status, u16 error) 301{ 302 int rc = ibmvfc_get_err_index(status, error); 303 304 if (rc >= 0) 305 return cmd_status[rc].retry; 306 return 1; 307} 308 309static const char *unknown_fc_explain = "unknown fc explain"; 310 311static const struct { 312 u16 fc_explain; 313 char *name; 314} ls_explain [] = { 315 { 0x00, "no additional explanation" }, 316 { 0x01, "service parameter error - options" }, 317 { 0x03, "service parameter error - initiator control" }, 318 { 0x05, "service parameter error - recipient control" }, 319 { 0x07, "service parameter error - received data field size" }, 320 { 0x09, "service parameter error - concurrent seq" }, 321 { 0x0B, "service parameter error - credit" }, 322 { 0x0D, "invalid N_Port/F_Port_Name" }, 323 { 0x0E, "invalid node/Fabric Name" }, 324 { 0x0F, "invalid common service parameters" }, 325 { 0x11, "invalid association header" }, 326 { 0x13, "association header required" }, 327 { 0x15, "invalid originator S_ID" }, 328 { 0x17, "invalid OX_ID-RX-ID combination" }, 329 { 0x19, "command (request) already in progress" }, 330 { 0x1E, "N_Port Login requested" }, 331 { 0x1F, "Invalid N_Port_ID" }, 332}; 333 334static const struct { 335 u16 fc_explain; 336 char *name; 337} gs_explain [] = { 338 { 0x00, "no additional explanation" }, 339 { 0x01, "port identifier not registered" }, 340 { 0x02, "port name not registered" }, 341 { 0x03, "node name not registered" }, 342 { 0x04, "class of service not registered" }, 343 { 0x06, "initial process associator not registered" }, 344 { 0x07, "FC-4 TYPEs not registered" }, 345 { 0x08, "symbolic port name not registered" }, 346 { 0x09, "symbolic node name not registered" }, 347 { 0x0A, "port type not registered" }, 348 { 0xF0, "authorization exception" }, 349 { 0xF1, "authentication exception" }, 350 { 0xF2, "data base full" }, 351 { 0xF3, "data base empty" }, 352 { 0xF4, "processing request" }, 353 { 0xF5, "unable to verify connection" }, 354 { 0xF6, "devices not in a common zone" }, 355}; 356 357/** 358 * ibmvfc_get_ls_explain - Return the FC Explain description text 359 * @status: FC Explain status 360 * 361 * Returns: 362 * error string 363 **/ 364static const char *ibmvfc_get_ls_explain(u16 status) 365{ 366 int i; 367 368 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 369 if (ls_explain[i].fc_explain == status) 370 return ls_explain[i].name; 371 372 return unknown_fc_explain; 373} 374 375/** 376 * ibmvfc_get_gs_explain - Return the FC Explain description text 377 * @status: FC Explain status 378 * 379 * Returns: 380 * error string 381 **/ 382static const char *ibmvfc_get_gs_explain(u16 status) 383{ 384 int i; 385 386 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 387 if (gs_explain[i].fc_explain == status) 388 return gs_explain[i].name; 389 390 return unknown_fc_explain; 391} 392 393static const struct { 394 enum ibmvfc_fc_type fc_type; 395 char *name; 396} fc_type [] = { 397 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 398 { IBMVFC_PORT_REJECT, "port reject" }, 399 { IBMVFC_LS_REJECT, "ELS reject" }, 400 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 401 { IBMVFC_PORT_BUSY, "port busy" }, 402 { IBMVFC_BASIC_REJECT, "basic reject" }, 403}; 404 405static const char *unknown_fc_type = "unknown fc type"; 406 407/** 408 * ibmvfc_get_fc_type - Return the FC Type description text 409 * @status: FC Type error status 410 * 411 * Returns: 412 * error string 413 **/ 414static const char *ibmvfc_get_fc_type(u16 status) 415{ 416 int i; 417 418 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 419 if (fc_type[i].fc_type == status) 420 return fc_type[i].name; 421 422 return unknown_fc_type; 423} 424 425/** 426 * ibmvfc_set_tgt_action - Set the next init action for the target 427 * @tgt: ibmvfc target struct 428 * @action: action to perform 429 * 430 **/ 431static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 432 enum ibmvfc_target_action action) 433{ 434 switch (tgt->action) { 435 case IBMVFC_TGT_ACTION_DEL_RPORT: 436 break; 437 default: 438 if (action == IBMVFC_TGT_ACTION_DEL_RPORT) 439 tgt->add_rport = 0; 440 tgt->action = action; 441 break; 442 } 443} 444 445/** 446 * ibmvfc_set_host_state - Set the state for the host 447 * @vhost: ibmvfc host struct 448 * @state: state to set host to 449 * 450 * Returns: 451 * 0 if state changed / non-zero if not changed 452 **/ 453static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 454 enum ibmvfc_host_state state) 455{ 456 int rc = 0; 457 458 switch (vhost->state) { 459 case IBMVFC_HOST_OFFLINE: 460 rc = -EINVAL; 461 break; 462 default: 463 vhost->state = state; 464 break; 465 }; 466 467 return rc; 468} 469 470/** 471 * ibmvfc_set_host_action - Set the next init action for the host 472 * @vhost: ibmvfc host struct 473 * @action: action to perform 474 * 475 **/ 476static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 477 enum ibmvfc_host_action action) 478{ 479 switch (action) { 480 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 481 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 482 vhost->action = action; 483 break; 484 case IBMVFC_HOST_ACTION_LOGO_WAIT: 485 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 486 vhost->action = action; 487 break; 488 case IBMVFC_HOST_ACTION_INIT_WAIT: 489 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 490 vhost->action = action; 491 break; 492 case IBMVFC_HOST_ACTION_QUERY: 493 switch (vhost->action) { 494 case IBMVFC_HOST_ACTION_INIT_WAIT: 495 case IBMVFC_HOST_ACTION_NONE: 496 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 497 vhost->action = action; 498 break; 499 default: 500 break; 501 }; 502 break; 503 case IBMVFC_HOST_ACTION_TGT_INIT: 504 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 505 vhost->action = action; 506 break; 507 case IBMVFC_HOST_ACTION_LOGO: 508 case IBMVFC_HOST_ACTION_INIT: 509 case IBMVFC_HOST_ACTION_TGT_DEL: 510 case IBMVFC_HOST_ACTION_QUERY_TGTS: 511 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 512 case IBMVFC_HOST_ACTION_NONE: 513 default: 514 vhost->action = action; 515 break; 516 }; 517} 518 519/** 520 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 521 * @vhost: ibmvfc host struct 522 * 523 * Return value: 524 * nothing 525 **/ 526static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 527{ 528 if (vhost->action == IBMVFC_HOST_ACTION_NONE) { 529 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 530 scsi_block_requests(vhost->host); 531 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 532 } 533 } else 534 vhost->reinit = 1; 535 536 wake_up(&vhost->work_wait_q); 537} 538 539/** 540 * ibmvfc_link_down - Handle a link down event from the adapter 541 * @vhost: ibmvfc host struct 542 * @state: ibmvfc host state to enter 543 * 544 **/ 545static void ibmvfc_link_down(struct ibmvfc_host *vhost, 546 enum ibmvfc_host_state state) 547{ 548 struct ibmvfc_target *tgt; 549 550 ENTER; 551 scsi_block_requests(vhost->host); 552 list_for_each_entry(tgt, &vhost->targets, queue) 553 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 554 ibmvfc_set_host_state(vhost, state); 555 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 556 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 557 wake_up(&vhost->work_wait_q); 558 LEAVE; 559} 560 561/** 562 * ibmvfc_init_host - Start host initialization 563 * @vhost: ibmvfc host struct 564 * 565 * Return value: 566 * nothing 567 **/ 568static void ibmvfc_init_host(struct ibmvfc_host *vhost) 569{ 570 struct ibmvfc_target *tgt; 571 572 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 573 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 574 dev_err(vhost->dev, 575 "Host initialization retries exceeded. Taking adapter offline\n"); 576 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 577 return; 578 } 579 } 580 581 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 582 memset(vhost->async_crq.msgs, 0, PAGE_SIZE); 583 vhost->async_crq.cur = 0; 584 585 list_for_each_entry(tgt, &vhost->targets, queue) 586 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 587 scsi_block_requests(vhost->host); 588 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 589 vhost->job_step = ibmvfc_npiv_login; 590 wake_up(&vhost->work_wait_q); 591 } 592} 593 594/** 595 * ibmvfc_send_crq - Send a CRQ 596 * @vhost: ibmvfc host struct 597 * @word1: the first 64 bits of the data 598 * @word2: the second 64 bits of the data 599 * 600 * Return value: 601 * 0 on success / other on failure 602 **/ 603static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 604{ 605 struct vio_dev *vdev = to_vio_dev(vhost->dev); 606 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 607} 608 609/** 610 * ibmvfc_send_crq_init - Send a CRQ init message 611 * @vhost: ibmvfc host struct 612 * 613 * Return value: 614 * 0 on success / other on failure 615 **/ 616static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 617{ 618 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 619 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 620} 621 622/** 623 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 624 * @vhost: ibmvfc host struct 625 * 626 * Return value: 627 * 0 on success / other on failure 628 **/ 629static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 630{ 631 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 632 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 633} 634 635/** 636 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 637 * @vhost: ibmvfc host struct 638 * 639 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 640 * the crq with the hypervisor. 641 **/ 642static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 643{ 644 long rc; 645 struct vio_dev *vdev = to_vio_dev(vhost->dev); 646 struct ibmvfc_crq_queue *crq = &vhost->crq; 647 648 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 649 free_irq(vdev->irq, vhost); 650 tasklet_kill(&vhost->tasklet); 651 do { 652 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 653 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 654 655 vhost->state = IBMVFC_NO_CRQ; 656 vhost->logged_in = 0; 657 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 658 free_page((unsigned long)crq->msgs); 659} 660 661/** 662 * ibmvfc_reenable_crq_queue - reenables the CRQ 663 * @vhost: ibmvfc host struct 664 * 665 * Return value: 666 * 0 on success / other on failure 667 **/ 668static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 669{ 670 int rc; 671 struct vio_dev *vdev = to_vio_dev(vhost->dev); 672 673 /* Re-enable the CRQ */ 674 do { 675 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 676 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 677 678 if (rc) 679 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 680 681 return rc; 682} 683 684/** 685 * ibmvfc_reset_crq - resets a crq after a failure 686 * @vhost: ibmvfc host struct 687 * 688 * Return value: 689 * 0 on success / other on failure 690 **/ 691static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 692{ 693 int rc; 694 struct vio_dev *vdev = to_vio_dev(vhost->dev); 695 struct ibmvfc_crq_queue *crq = &vhost->crq; 696 697 /* Close the CRQ */ 698 do { 699 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 700 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 701 702 vhost->state = IBMVFC_NO_CRQ; 703 vhost->logged_in = 0; 704 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 705 706 /* Clean out the queue */ 707 memset(crq->msgs, 0, PAGE_SIZE); 708 crq->cur = 0; 709 710 /* And re-open it again */ 711 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 712 crq->msg_token, PAGE_SIZE); 713 714 if (rc == H_CLOSED) 715 /* Adapter is good, but other end is not ready */ 716 dev_warn(vhost->dev, "Partner adapter not ready\n"); 717 else if (rc != 0) 718 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 719 720 return rc; 721} 722 723/** 724 * ibmvfc_valid_event - Determines if event is valid. 725 * @pool: event_pool that contains the event 726 * @evt: ibmvfc event to be checked for validity 727 * 728 * Return value: 729 * 1 if event is valid / 0 if event is not valid 730 **/ 731static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 732 struct ibmvfc_event *evt) 733{ 734 int index = evt - pool->events; 735 if (index < 0 || index >= pool->size) /* outside of bounds */ 736 return 0; 737 if (evt != pool->events + index) /* unaligned */ 738 return 0; 739 return 1; 740} 741 742/** 743 * ibmvfc_free_event - Free the specified event 744 * @evt: ibmvfc_event to be freed 745 * 746 **/ 747static void ibmvfc_free_event(struct ibmvfc_event *evt) 748{ 749 struct ibmvfc_host *vhost = evt->vhost; 750 struct ibmvfc_event_pool *pool = &vhost->pool; 751 752 BUG_ON(!ibmvfc_valid_event(pool, evt)); 753 BUG_ON(atomic_inc_return(&evt->free) != 1); 754 list_add_tail(&evt->queue, &vhost->free); 755} 756 757/** 758 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 759 * @evt: ibmvfc event struct 760 * 761 * This function does not setup any error status, that must be done 762 * before this function gets called. 763 **/ 764static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 765{ 766 struct scsi_cmnd *cmnd = evt->cmnd; 767 768 if (cmnd) { 769 scsi_dma_unmap(cmnd); 770 cmnd->scsi_done(cmnd); 771 } 772 773 if (evt->eh_comp) 774 complete(evt->eh_comp); 775 776 ibmvfc_free_event(evt); 777} 778 779/** 780 * ibmvfc_fail_request - Fail request with specified error code 781 * @evt: ibmvfc event struct 782 * @error_code: error code to fail request with 783 * 784 * Return value: 785 * none 786 **/ 787static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 788{ 789 if (evt->cmnd) { 790 evt->cmnd->result = (error_code << 16); 791 evt->done = ibmvfc_scsi_eh_done; 792 } else 793 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; 794 795 list_del(&evt->queue); 796 del_timer(&evt->timer); 797 ibmvfc_trc_end(evt); 798 evt->done(evt); 799} 800 801/** 802 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 803 * @vhost: ibmvfc host struct 804 * @error_code: error code to fail requests with 805 * 806 * Return value: 807 * none 808 **/ 809static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 810{ 811 struct ibmvfc_event *evt, *pos; 812 813 ibmvfc_dbg(vhost, "Purging all requests\n"); 814 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 815 ibmvfc_fail_request(evt, error_code); 816} 817 818/** 819 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 820 * @vhost: struct ibmvfc host to reset 821 **/ 822static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 823{ 824 int rc; 825 826 scsi_block_requests(vhost->host); 827 ibmvfc_purge_requests(vhost, DID_ERROR); 828 if ((rc = ibmvfc_reset_crq(vhost)) || 829 (rc = ibmvfc_send_crq_init(vhost)) || 830 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 831 dev_err(vhost->dev, "Error after reset rc=%d\n", rc); 832 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 833 } else 834 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 835} 836 837/** 838 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 839 * @vhost: struct ibmvfc host to reset 840 **/ 841static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 842{ 843 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 844 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 845 scsi_block_requests(vhost->host); 846 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 847 vhost->job_step = ibmvfc_npiv_logout; 848 wake_up(&vhost->work_wait_q); 849 } else 850 ibmvfc_hard_reset_host(vhost); 851} 852 853/** 854 * ibmvfc_reset_host - Reset the connection to the server 855 * @vhost: ibmvfc host struct 856 **/ 857static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 858{ 859 unsigned long flags; 860 861 spin_lock_irqsave(vhost->host->host_lock, flags); 862 __ibmvfc_reset_host(vhost); 863 spin_unlock_irqrestore(vhost->host->host_lock, flags); 864} 865 866/** 867 * ibmvfc_retry_host_init - Retry host initialization if allowed 868 * @vhost: ibmvfc host struct 869 * 870 * Returns: 1 if init will be retried / 0 if not 871 * 872 **/ 873static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 874{ 875 int retry = 0; 876 877 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 878 vhost->delay_init = 1; 879 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 880 dev_err(vhost->dev, 881 "Host initialization retries exceeded. Taking adapter offline\n"); 882 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 883 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 884 __ibmvfc_reset_host(vhost); 885 else { 886 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 887 retry = 1; 888 } 889 } 890 891 wake_up(&vhost->work_wait_q); 892 return retry; 893} 894 895/** 896 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 897 * @starget: scsi target struct 898 * 899 * Return value: 900 * ibmvfc_target struct / NULL if not found 901 **/ 902static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 903{ 904 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 905 struct ibmvfc_host *vhost = shost_priv(shost); 906 struct ibmvfc_target *tgt; 907 908 list_for_each_entry(tgt, &vhost->targets, queue) 909 if (tgt->target_id == starget->id) { 910 kref_get(&tgt->kref); 911 return tgt; 912 } 913 return NULL; 914} 915 916/** 917 * ibmvfc_get_target - Find the specified scsi_target 918 * @starget: scsi target struct 919 * 920 * Return value: 921 * ibmvfc_target struct / NULL if not found 922 **/ 923static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 924{ 925 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 926 struct ibmvfc_target *tgt; 927 unsigned long flags; 928 929 spin_lock_irqsave(shost->host_lock, flags); 930 tgt = __ibmvfc_get_target(starget); 931 spin_unlock_irqrestore(shost->host_lock, flags); 932 return tgt; 933} 934 935/** 936 * ibmvfc_get_host_speed - Get host port speed 937 * @shost: scsi host struct 938 * 939 * Return value: 940 * none 941 **/ 942static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 943{ 944 struct ibmvfc_host *vhost = shost_priv(shost); 945 unsigned long flags; 946 947 spin_lock_irqsave(shost->host_lock, flags); 948 if (vhost->state == IBMVFC_ACTIVE) { 949 switch (vhost->login_buf->resp.link_speed / 100) { 950 case 1: 951 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 952 break; 953 case 2: 954 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 955 break; 956 case 4: 957 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 958 break; 959 case 8: 960 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 961 break; 962 case 10: 963 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 964 break; 965 case 16: 966 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 967 break; 968 default: 969 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 970 vhost->login_buf->resp.link_speed / 100); 971 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 972 break; 973 } 974 } else 975 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 976 spin_unlock_irqrestore(shost->host_lock, flags); 977} 978 979/** 980 * ibmvfc_get_host_port_state - Get host port state 981 * @shost: scsi host struct 982 * 983 * Return value: 984 * none 985 **/ 986static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 987{ 988 struct ibmvfc_host *vhost = shost_priv(shost); 989 unsigned long flags; 990 991 spin_lock_irqsave(shost->host_lock, flags); 992 switch (vhost->state) { 993 case IBMVFC_INITIALIZING: 994 case IBMVFC_ACTIVE: 995 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 996 break; 997 case IBMVFC_LINK_DOWN: 998 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 999 break; 1000 case IBMVFC_LINK_DEAD: 1001 case IBMVFC_HOST_OFFLINE: 1002 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1003 break; 1004 case IBMVFC_HALTED: 1005 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1006 break; 1007 case IBMVFC_NO_CRQ: 1008 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1009 break; 1010 default: 1011 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1012 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1013 break; 1014 } 1015 spin_unlock_irqrestore(shost->host_lock, flags); 1016} 1017 1018/** 1019 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1020 * @rport: rport struct 1021 * @timeout: timeout value 1022 * 1023 * Return value: 1024 * none 1025 **/ 1026static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1027{ 1028 if (timeout) 1029 rport->dev_loss_tmo = timeout; 1030 else 1031 rport->dev_loss_tmo = 1; 1032} 1033 1034/** 1035 * ibmvfc_release_tgt - Free memory allocated for a target 1036 * @kref: kref struct 1037 * 1038 **/ 1039static void ibmvfc_release_tgt(struct kref *kref) 1040{ 1041 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1042 kfree(tgt); 1043} 1044 1045/** 1046 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1047 * @starget: scsi target struct 1048 * 1049 * Return value: 1050 * none 1051 **/ 1052static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1053{ 1054 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1055 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1056 if (tgt) 1057 kref_put(&tgt->kref, ibmvfc_release_tgt); 1058} 1059 1060/** 1061 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1062 * @starget: scsi target struct 1063 * 1064 * Return value: 1065 * none 1066 **/ 1067static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1068{ 1069 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1070 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1071 if (tgt) 1072 kref_put(&tgt->kref, ibmvfc_release_tgt); 1073} 1074 1075/** 1076 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1077 * @starget: scsi target struct 1078 * 1079 * Return value: 1080 * none 1081 **/ 1082static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1083{ 1084 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1085 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1086 if (tgt) 1087 kref_put(&tgt->kref, ibmvfc_release_tgt); 1088} 1089 1090/** 1091 * ibmvfc_wait_while_resetting - Wait while the host resets 1092 * @vhost: ibmvfc host struct 1093 * 1094 * Return value: 1095 * 0 on success / other on failure 1096 **/ 1097static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1098{ 1099 long timeout = wait_event_timeout(vhost->init_wait_q, 1100 ((vhost->state == IBMVFC_ACTIVE || 1101 vhost->state == IBMVFC_HOST_OFFLINE || 1102 vhost->state == IBMVFC_LINK_DEAD) && 1103 vhost->action == IBMVFC_HOST_ACTION_NONE), 1104 (init_timeout * HZ)); 1105 1106 return timeout ? 0 : -EIO; 1107} 1108 1109/** 1110 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1111 * @shost: scsi host struct 1112 * 1113 * Return value: 1114 * 0 on success / other on failure 1115 **/ 1116static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1117{ 1118 struct ibmvfc_host *vhost = shost_priv(shost); 1119 1120 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1121 ibmvfc_reset_host(vhost); 1122 return ibmvfc_wait_while_resetting(vhost); 1123} 1124 1125/** 1126 * ibmvfc_gather_partition_info - Gather info about the LPAR 1127 * 1128 * Return value: 1129 * none 1130 **/ 1131static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1132{ 1133 struct device_node *rootdn; 1134 const char *name; 1135 const unsigned int *num; 1136 1137 rootdn = of_find_node_by_path("/"); 1138 if (!rootdn) 1139 return; 1140 1141 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1142 if (name) 1143 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1144 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1145 if (num) 1146 vhost->partition_number = *num; 1147 of_node_put(rootdn); 1148} 1149 1150/** 1151 * ibmvfc_set_login_info - Setup info for NPIV login 1152 * @vhost: ibmvfc host struct 1153 * 1154 * Return value: 1155 * none 1156 **/ 1157static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1158{ 1159 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1160 struct device_node *of_node = vhost->dev->archdata.of_node; 1161 const char *location; 1162 1163 memset(login_info, 0, sizeof(*login_info)); 1164 1165 login_info->ostype = IBMVFC_OS_LINUX; 1166 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; 1167 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); 1168 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); 1169 login_info->partition_num = vhost->partition_number; 1170 login_info->vfc_frame_version = 1; 1171 login_info->fcp_version = 3; 1172 login_info->flags = IBMVFC_FLUSH_ON_HALT; 1173 if (vhost->client_migrated) 1174 login_info->flags |= IBMVFC_CLIENT_MIGRATED; 1175 1176 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1177 login_info->capabilities = IBMVFC_CAN_MIGRATE; 1178 login_info->async.va = vhost->async_crq.msg_token; 1179 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); 1180 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1181 strncpy(login_info->device_name, 1182 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1183 1184 location = of_get_property(of_node, "ibm,loc-code", NULL); 1185 location = location ? location : dev_name(vhost->dev); 1186 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1187} 1188 1189/** 1190 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1191 * @vhost: ibmvfc host who owns the event pool 1192 * 1193 * Returns zero on success. 1194 **/ 1195static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1196{ 1197 int i; 1198 struct ibmvfc_event_pool *pool = &vhost->pool; 1199 1200 ENTER; 1201 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1202 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1203 if (!pool->events) 1204 return -ENOMEM; 1205 1206 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1207 pool->size * sizeof(*pool->iu_storage), 1208 &pool->iu_token, 0); 1209 1210 if (!pool->iu_storage) { 1211 kfree(pool->events); 1212 return -ENOMEM; 1213 } 1214 1215 for (i = 0; i < pool->size; ++i) { 1216 struct ibmvfc_event *evt = &pool->events[i]; 1217 atomic_set(&evt->free, 1); 1218 evt->crq.valid = 0x80; 1219 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); 1220 evt->xfer_iu = pool->iu_storage + i; 1221 evt->vhost = vhost; 1222 evt->ext_list = NULL; 1223 list_add_tail(&evt->queue, &vhost->free); 1224 } 1225 1226 LEAVE; 1227 return 0; 1228} 1229 1230/** 1231 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1232 * @vhost: ibmvfc host who owns the event pool 1233 * 1234 **/ 1235static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1236{ 1237 int i; 1238 struct ibmvfc_event_pool *pool = &vhost->pool; 1239 1240 ENTER; 1241 for (i = 0; i < pool->size; ++i) { 1242 list_del(&pool->events[i].queue); 1243 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1244 if (pool->events[i].ext_list) 1245 dma_pool_free(vhost->sg_pool, 1246 pool->events[i].ext_list, 1247 pool->events[i].ext_list_token); 1248 } 1249 1250 kfree(pool->events); 1251 dma_free_coherent(vhost->dev, 1252 pool->size * sizeof(*pool->iu_storage), 1253 pool->iu_storage, pool->iu_token); 1254 LEAVE; 1255} 1256 1257/** 1258 * ibmvfc_get_event - Gets the next free event in pool 1259 * @vhost: ibmvfc host struct 1260 * 1261 * Returns a free event from the pool. 1262 **/ 1263static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1264{ 1265 struct ibmvfc_event *evt; 1266 1267 BUG_ON(list_empty(&vhost->free)); 1268 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1269 atomic_set(&evt->free, 0); 1270 list_del(&evt->queue); 1271 return evt; 1272} 1273 1274/** 1275 * ibmvfc_init_event - Initialize fields in an event struct that are always 1276 * required. 1277 * @evt: The event 1278 * @done: Routine to call when the event is responded to 1279 * @format: SRP or MAD format 1280 **/ 1281static void ibmvfc_init_event(struct ibmvfc_event *evt, 1282 void (*done) (struct ibmvfc_event *), u8 format) 1283{ 1284 evt->cmnd = NULL; 1285 evt->sync_iu = NULL; 1286 evt->crq.format = format; 1287 evt->done = done; 1288 evt->eh_comp = NULL; 1289} 1290 1291/** 1292 * ibmvfc_map_sg_list - Initialize scatterlist 1293 * @scmd: scsi command struct 1294 * @nseg: number of scatterlist segments 1295 * @md: memory descriptor list to initialize 1296 **/ 1297static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1298 struct srp_direct_buf *md) 1299{ 1300 int i; 1301 struct scatterlist *sg; 1302 1303 scsi_for_each_sg(scmd, sg, nseg, i) { 1304 md[i].va = sg_dma_address(sg); 1305 md[i].len = sg_dma_len(sg); 1306 md[i].key = 0; 1307 } 1308} 1309 1310/** 1311 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1312 * @scmd: Scsi_Cmnd with the scatterlist 1313 * @evt: ibmvfc event struct 1314 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1315 * @dev: device for which to map dma memory 1316 * 1317 * Returns: 1318 * 0 on success / non-zero on failure 1319 **/ 1320static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1321 struct ibmvfc_event *evt, 1322 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1323{ 1324 1325 int sg_mapped; 1326 struct srp_direct_buf *data = &vfc_cmd->ioba; 1327 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1328 1329 sg_mapped = scsi_dma_map(scmd); 1330 if (!sg_mapped) { 1331 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; 1332 return 0; 1333 } else if (unlikely(sg_mapped < 0)) { 1334 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1335 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1336 return sg_mapped; 1337 } 1338 1339 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1340 vfc_cmd->flags |= IBMVFC_WRITE; 1341 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1342 } else { 1343 vfc_cmd->flags |= IBMVFC_READ; 1344 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1345 } 1346 1347 if (sg_mapped == 1) { 1348 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1349 return 0; 1350 } 1351 1352 vfc_cmd->flags |= IBMVFC_SCATTERLIST; 1353 1354 if (!evt->ext_list) { 1355 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1356 &evt->ext_list_token); 1357 1358 if (!evt->ext_list) { 1359 scsi_dma_unmap(scmd); 1360 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1361 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1362 return -ENOMEM; 1363 } 1364 } 1365 1366 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1367 1368 data->va = evt->ext_list_token; 1369 data->len = sg_mapped * sizeof(struct srp_direct_buf); 1370 data->key = 0; 1371 return 0; 1372} 1373 1374/** 1375 * ibmvfc_timeout - Internal command timeout handler 1376 * @evt: struct ibmvfc_event that timed out 1377 * 1378 * Called when an internally generated command times out 1379 **/ 1380static void ibmvfc_timeout(struct ibmvfc_event *evt) 1381{ 1382 struct ibmvfc_host *vhost = evt->vhost; 1383 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1384 ibmvfc_reset_host(vhost); 1385} 1386 1387/** 1388 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1389 * @evt: event to be sent 1390 * @vhost: ibmvfc host struct 1391 * @timeout: timeout in seconds - 0 means do not time command 1392 * 1393 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1394 **/ 1395static int ibmvfc_send_event(struct ibmvfc_event *evt, 1396 struct ibmvfc_host *vhost, unsigned long timeout) 1397{ 1398 u64 *crq_as_u64 = (u64 *) &evt->crq; 1399 int rc; 1400 1401 /* Copy the IU into the transfer area */ 1402 *evt->xfer_iu = evt->iu; 1403 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1404 evt->xfer_iu->cmd.tag = (u64)evt; 1405 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1406 evt->xfer_iu->mad_common.tag = (u64)evt; 1407 else 1408 BUG(); 1409 1410 list_add_tail(&evt->queue, &vhost->sent); 1411 init_timer(&evt->timer); 1412 1413 if (timeout) { 1414 evt->timer.data = (unsigned long) evt; 1415 evt->timer.expires = jiffies + (timeout * HZ); 1416 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; 1417 add_timer(&evt->timer); 1418 } 1419 1420 mb(); 1421 1422 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { 1423 list_del(&evt->queue); 1424 del_timer(&evt->timer); 1425 1426 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1427 * Firmware will send a CRQ with a transport event (0xFF) to 1428 * tell this client what has happened to the transport. This 1429 * will be handled in ibmvfc_handle_crq() 1430 */ 1431 if (rc == H_CLOSED) { 1432 if (printk_ratelimit()) 1433 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1434 if (evt->cmnd) 1435 scsi_dma_unmap(evt->cmnd); 1436 ibmvfc_free_event(evt); 1437 return SCSI_MLQUEUE_HOST_BUSY; 1438 } 1439 1440 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1441 if (evt->cmnd) { 1442 evt->cmnd->result = DID_ERROR << 16; 1443 evt->done = ibmvfc_scsi_eh_done; 1444 } else 1445 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; 1446 1447 evt->done(evt); 1448 } else 1449 ibmvfc_trc_start(evt); 1450 1451 return 0; 1452} 1453 1454/** 1455 * ibmvfc_log_error - Log an error for the failed command if appropriate 1456 * @evt: ibmvfc event to log 1457 * 1458 **/ 1459static void ibmvfc_log_error(struct ibmvfc_event *evt) 1460{ 1461 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1462 struct ibmvfc_host *vhost = evt->vhost; 1463 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1464 struct scsi_cmnd *cmnd = evt->cmnd; 1465 const char *err = unknown_error; 1466 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 1467 int logerr = 0; 1468 int rsp_code = 0; 1469 1470 if (index >= 0) { 1471 logerr = cmd_status[index].log; 1472 err = cmd_status[index].name; 1473 } 1474 1475 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1476 return; 1477 1478 if (rsp->flags & FCP_RSP_LEN_VALID) 1479 rsp_code = rsp->data.info.rsp_code; 1480 1481 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1482 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1483 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1484 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1485} 1486 1487/** 1488 * ibmvfc_relogin - Log back into the specified device 1489 * @sdev: scsi device struct 1490 * 1491 **/ 1492static void ibmvfc_relogin(struct scsi_device *sdev) 1493{ 1494 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1495 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1496 struct ibmvfc_target *tgt; 1497 1498 list_for_each_entry(tgt, &vhost->targets, queue) { 1499 if (rport == tgt->rport) { 1500 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 1501 break; 1502 } 1503 } 1504 1505 ibmvfc_reinit_host(vhost); 1506} 1507 1508/** 1509 * ibmvfc_scsi_done - Handle responses from commands 1510 * @evt: ibmvfc event to be handled 1511 * 1512 * Used as a callback when sending scsi cmds. 1513 **/ 1514static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1515{ 1516 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1517 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1518 struct scsi_cmnd *cmnd = evt->cmnd; 1519 u32 rsp_len = 0; 1520 u32 sense_len = rsp->fcp_sense_len; 1521 1522 if (cmnd) { 1523 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) 1524 scsi_set_resid(cmnd, vfc_cmd->adapter_resid); 1525 else if (rsp->flags & FCP_RESID_UNDER) 1526 scsi_set_resid(cmnd, rsp->fcp_resid); 1527 else 1528 scsi_set_resid(cmnd, 0); 1529 1530 if (vfc_cmd->status) { 1531 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1532 1533 if (rsp->flags & FCP_RSP_LEN_VALID) 1534 rsp_len = rsp->fcp_rsp_len; 1535 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1536 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1537 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1538 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1539 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED)) 1540 ibmvfc_relogin(cmnd->device); 1541 1542 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1543 cmnd->result = (DID_ERROR << 16); 1544 1545 ibmvfc_log_error(evt); 1546 } 1547 1548 if (!cmnd->result && 1549 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1550 cmnd->result = (DID_ERROR << 16); 1551 1552 scsi_dma_unmap(cmnd); 1553 cmnd->scsi_done(cmnd); 1554 } 1555 1556 if (evt->eh_comp) 1557 complete(evt->eh_comp); 1558 1559 ibmvfc_free_event(evt); 1560} 1561 1562/** 1563 * ibmvfc_host_chkready - Check if the host can accept commands 1564 * @vhost: struct ibmvfc host 1565 * 1566 * Returns: 1567 * 1 if host can accept command / 0 if not 1568 **/ 1569static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1570{ 1571 int result = 0; 1572 1573 switch (vhost->state) { 1574 case IBMVFC_LINK_DEAD: 1575 case IBMVFC_HOST_OFFLINE: 1576 result = DID_NO_CONNECT << 16; 1577 break; 1578 case IBMVFC_NO_CRQ: 1579 case IBMVFC_INITIALIZING: 1580 case IBMVFC_HALTED: 1581 case IBMVFC_LINK_DOWN: 1582 result = DID_REQUEUE << 16; 1583 break; 1584 case IBMVFC_ACTIVE: 1585 result = 0; 1586 break; 1587 }; 1588 1589 return result; 1590} 1591 1592/** 1593 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1594 * @cmnd: struct scsi_cmnd to be executed 1595 * @done: Callback function to be called when cmnd is completed 1596 * 1597 * Returns: 1598 * 0 on success / other on failure 1599 **/ 1600static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, 1601 void (*done) (struct scsi_cmnd *)) 1602{ 1603 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1604 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1605 struct ibmvfc_cmd *vfc_cmd; 1606 struct ibmvfc_event *evt; 1607 u8 tag[2]; 1608 int rc; 1609 1610 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1611 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1612 cmnd->result = rc; 1613 done(cmnd); 1614 return 0; 1615 } 1616 1617 cmnd->result = (DID_OK << 16); 1618 evt = ibmvfc_get_event(vhost); 1619 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1620 evt->cmnd = cmnd; 1621 cmnd->scsi_done = done; 1622 vfc_cmd = &evt->iu.cmd; 1623 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1624 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1625 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); 1626 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; 1627 vfc_cmd->payload_len = sizeof(vfc_cmd->iu); 1628 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); 1629 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; 1630 vfc_cmd->tgt_scsi_id = rport->port_id; 1631 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); 1632 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1633 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1634 1635 if (scsi_populate_tag_msg(cmnd, tag)) { 1636 vfc_cmd->task_tag = tag[1]; 1637 switch (tag[0]) { 1638 case MSG_SIMPLE_TAG: 1639 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1640 break; 1641 case MSG_HEAD_TAG: 1642 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; 1643 break; 1644 case MSG_ORDERED_TAG: 1645 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; 1646 break; 1647 }; 1648 } 1649 1650 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1651 return ibmvfc_send_event(evt, vhost, 0); 1652 1653 ibmvfc_free_event(evt); 1654 if (rc == -ENOMEM) 1655 return SCSI_MLQUEUE_HOST_BUSY; 1656 1657 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1658 scmd_printk(KERN_ERR, cmnd, 1659 "Failed to map DMA buffer for command. rc=%d\n", rc); 1660 1661 cmnd->result = DID_ERROR << 16; 1662 done(cmnd); 1663 return 0; 1664} 1665 1666/** 1667 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1668 * @evt: ibmvfc event struct 1669 * 1670 **/ 1671static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1672{ 1673 /* copy the response back */ 1674 if (evt->sync_iu) 1675 *evt->sync_iu = *evt->xfer_iu; 1676 1677 complete(&evt->comp); 1678} 1679 1680/** 1681 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 1682 * @evt: struct ibmvfc_event 1683 * 1684 **/ 1685static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 1686{ 1687 struct ibmvfc_host *vhost = evt->vhost; 1688 1689 ibmvfc_free_event(evt); 1690 vhost->aborting_passthru = 0; 1691 dev_info(vhost->dev, "Passthru command cancelled\n"); 1692} 1693 1694/** 1695 * ibmvfc_bsg_timeout - Handle a BSG timeout 1696 * @job: struct fc_bsg_job that timed out 1697 * 1698 * Returns: 1699 * 0 on success / other on failure 1700 **/ 1701static int ibmvfc_bsg_timeout(struct fc_bsg_job *job) 1702{ 1703 struct ibmvfc_host *vhost = shost_priv(job->shost); 1704 unsigned long port_id = (unsigned long)job->dd_data; 1705 struct ibmvfc_event *evt; 1706 struct ibmvfc_tmf *tmf; 1707 unsigned long flags; 1708 int rc; 1709 1710 ENTER; 1711 spin_lock_irqsave(vhost->host->host_lock, flags); 1712 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 1713 __ibmvfc_reset_host(vhost); 1714 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1715 return 0; 1716 } 1717 1718 vhost->aborting_passthru = 1; 1719 evt = ibmvfc_get_event(vhost); 1720 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 1721 1722 tmf = &evt->iu.tmf; 1723 memset(tmf, 0, sizeof(*tmf)); 1724 tmf->common.version = 1; 1725 tmf->common.opcode = IBMVFC_TMF_MAD; 1726 tmf->common.length = sizeof(*tmf); 1727 tmf->scsi_id = port_id; 1728 tmf->cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY; 1729 tmf->my_cancel_key = IBMVFC_INTERNAL_CANCEL_KEY; 1730 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1731 1732 if (rc != 0) { 1733 vhost->aborting_passthru = 0; 1734 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 1735 rc = -EIO; 1736 } else 1737 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 1738 port_id); 1739 1740 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1741 1742 LEAVE; 1743 return rc; 1744} 1745 1746/** 1747 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 1748 * @vhost: struct ibmvfc_host to send command 1749 * @port_id: port ID to send command 1750 * 1751 * Returns: 1752 * 0 on success / other on failure 1753 **/ 1754static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 1755{ 1756 struct ibmvfc_port_login *plogi; 1757 struct ibmvfc_target *tgt; 1758 struct ibmvfc_event *evt; 1759 union ibmvfc_iu rsp_iu; 1760 unsigned long flags; 1761 int rc = 0, issue_login = 1; 1762 1763 ENTER; 1764 spin_lock_irqsave(vhost->host->host_lock, flags); 1765 list_for_each_entry(tgt, &vhost->targets, queue) { 1766 if (tgt->scsi_id == port_id) { 1767 issue_login = 0; 1768 break; 1769 } 1770 } 1771 1772 if (!issue_login) 1773 goto unlock_out; 1774 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 1775 goto unlock_out; 1776 1777 evt = ibmvfc_get_event(vhost); 1778 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1779 plogi = &evt->iu.plogi; 1780 memset(plogi, 0, sizeof(*plogi)); 1781 plogi->common.version = 1; 1782 plogi->common.opcode = IBMVFC_PORT_LOGIN; 1783 plogi->common.length = sizeof(*plogi); 1784 plogi->scsi_id = port_id; 1785 evt->sync_iu = &rsp_iu; 1786 init_completion(&evt->comp); 1787 1788 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1789 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1790 1791 if (rc) 1792 return -EIO; 1793 1794 wait_for_completion(&evt->comp); 1795 1796 if (rsp_iu.plogi.common.status) 1797 rc = -EIO; 1798 1799 spin_lock_irqsave(vhost->host->host_lock, flags); 1800 ibmvfc_free_event(evt); 1801unlock_out: 1802 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1803 LEAVE; 1804 return rc; 1805} 1806 1807/** 1808 * ibmvfc_bsg_request - Handle a BSG request 1809 * @job: struct fc_bsg_job to be executed 1810 * 1811 * Returns: 1812 * 0 on success / other on failure 1813 **/ 1814static int ibmvfc_bsg_request(struct fc_bsg_job *job) 1815{ 1816 struct ibmvfc_host *vhost = shost_priv(job->shost); 1817 struct fc_rport *rport = job->rport; 1818 struct ibmvfc_passthru_mad *mad; 1819 struct ibmvfc_event *evt; 1820 union ibmvfc_iu rsp_iu; 1821 unsigned long flags, port_id = -1; 1822 unsigned int code = job->request->msgcode; 1823 int rc = 0, req_seg, rsp_seg, issue_login = 0; 1824 u32 fc_flags, rsp_len; 1825 1826 ENTER; 1827 job->reply->reply_payload_rcv_len = 0; 1828 if (rport) 1829 port_id = rport->port_id; 1830 1831 switch (code) { 1832 case FC_BSG_HST_ELS_NOLOGIN: 1833 port_id = (job->request->rqst_data.h_els.port_id[0] << 16) | 1834 (job->request->rqst_data.h_els.port_id[1] << 8) | 1835 job->request->rqst_data.h_els.port_id[2]; 1836 case FC_BSG_RPT_ELS: 1837 fc_flags = IBMVFC_FC_ELS; 1838 break; 1839 case FC_BSG_HST_CT: 1840 issue_login = 1; 1841 port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) | 1842 (job->request->rqst_data.h_ct.port_id[1] << 8) | 1843 job->request->rqst_data.h_ct.port_id[2]; 1844 case FC_BSG_RPT_CT: 1845 fc_flags = IBMVFC_FC_CT_IU; 1846 break; 1847 default: 1848 return -ENOTSUPP; 1849 }; 1850 1851 if (port_id == -1) 1852 return -EINVAL; 1853 if (!mutex_trylock(&vhost->passthru_mutex)) 1854 return -EBUSY; 1855 1856 job->dd_data = (void *)port_id; 1857 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 1858 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1859 1860 if (!req_seg) { 1861 mutex_unlock(&vhost->passthru_mutex); 1862 return -ENOMEM; 1863 } 1864 1865 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 1866 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1867 1868 if (!rsp_seg) { 1869 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1870 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1871 mutex_unlock(&vhost->passthru_mutex); 1872 return -ENOMEM; 1873 } 1874 1875 if (req_seg > 1 || rsp_seg > 1) { 1876 rc = -EINVAL; 1877 goto out; 1878 } 1879 1880 if (issue_login) 1881 rc = ibmvfc_bsg_plogi(vhost, port_id); 1882 1883 spin_lock_irqsave(vhost->host->host_lock, flags); 1884 1885 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 1886 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1887 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1888 goto out; 1889 } 1890 1891 evt = ibmvfc_get_event(vhost); 1892 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1893 mad = &evt->iu.passthru; 1894 1895 memset(mad, 0, sizeof(*mad)); 1896 mad->common.version = 1; 1897 mad->common.opcode = IBMVFC_PASSTHRU; 1898 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 1899 1900 mad->cmd_ioba.va = (u64)evt->crq.ioba + 1901 offsetof(struct ibmvfc_passthru_mad, iu); 1902 mad->cmd_ioba.len = sizeof(mad->iu); 1903 1904 mad->iu.cmd_len = job->request_payload.payload_len; 1905 mad->iu.rsp_len = job->reply_payload.payload_len; 1906 mad->iu.flags = fc_flags; 1907 mad->iu.cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY; 1908 1909 mad->iu.cmd.va = sg_dma_address(job->request_payload.sg_list); 1910 mad->iu.cmd.len = sg_dma_len(job->request_payload.sg_list); 1911 mad->iu.rsp.va = sg_dma_address(job->reply_payload.sg_list); 1912 mad->iu.rsp.len = sg_dma_len(job->reply_payload.sg_list); 1913 mad->iu.scsi_id = port_id; 1914 mad->iu.tag = (u64)evt; 1915 rsp_len = mad->iu.rsp.len; 1916 1917 evt->sync_iu = &rsp_iu; 1918 init_completion(&evt->comp); 1919 rc = ibmvfc_send_event(evt, vhost, 0); 1920 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1921 1922 if (rc) { 1923 rc = -EIO; 1924 goto out; 1925 } 1926 1927 wait_for_completion(&evt->comp); 1928 1929 if (rsp_iu.passthru.common.status) 1930 rc = -EIO; 1931 else 1932 job->reply->reply_payload_rcv_len = rsp_len; 1933 1934 spin_lock_irqsave(vhost->host->host_lock, flags); 1935 ibmvfc_free_event(evt); 1936 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1937 job->reply->result = rc; 1938 job->job_done(job); 1939 rc = 0; 1940out: 1941 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1942 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1943 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 1944 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1945 mutex_unlock(&vhost->passthru_mutex); 1946 LEAVE; 1947 return rc; 1948} 1949 1950/** 1951 * ibmvfc_reset_device - Reset the device with the specified reset type 1952 * @sdev: scsi device to reset 1953 * @type: reset type 1954 * @desc: reset type description for log messages 1955 * 1956 * Returns: 1957 * 0 on success / other on failure 1958 **/ 1959static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1960{ 1961 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1962 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1963 struct ibmvfc_cmd *tmf; 1964 struct ibmvfc_event *evt = NULL; 1965 union ibmvfc_iu rsp_iu; 1966 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1967 int rsp_rc = -EBUSY; 1968 unsigned long flags; 1969 int rsp_code = 0; 1970 1971 spin_lock_irqsave(vhost->host->host_lock, flags); 1972 if (vhost->state == IBMVFC_ACTIVE) { 1973 evt = ibmvfc_get_event(vhost); 1974 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1975 1976 tmf = &evt->iu.cmd; 1977 memset(tmf, 0, sizeof(*tmf)); 1978 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1979 tmf->resp.len = sizeof(tmf->rsp); 1980 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1981 tmf->payload_len = sizeof(tmf->iu); 1982 tmf->resp_len = sizeof(tmf->rsp); 1983 tmf->cancel_key = (unsigned long)sdev->hostdata; 1984 tmf->tgt_scsi_id = rport->port_id; 1985 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1986 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1987 tmf->iu.tmf_flags = type; 1988 evt->sync_iu = &rsp_iu; 1989 1990 init_completion(&evt->comp); 1991 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1992 } 1993 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1994 1995 if (rsp_rc != 0) { 1996 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 1997 desc, rsp_rc); 1998 return -EIO; 1999 } 2000 2001 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2002 wait_for_completion(&evt->comp); 2003 2004 if (rsp_iu.cmd.status) 2005 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2006 2007 if (rsp_code) { 2008 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2009 rsp_code = fc_rsp->data.info.rsp_code; 2010 2011 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2012 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2013 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 2014 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2015 fc_rsp->scsi_status); 2016 rsp_rc = -EIO; 2017 } else 2018 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2019 2020 spin_lock_irqsave(vhost->host->host_lock, flags); 2021 ibmvfc_free_event(evt); 2022 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2023 return rsp_rc; 2024} 2025 2026/** 2027 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2028 * @sdev: scsi device to abort commands 2029 * 2030 * This sends an Abort Task Set to the VIOS for the specified device. This does 2031 * NOT send any cancel to the VIOS. That must be done separately. 2032 * 2033 * Returns: 2034 * 0 on success / other on failure 2035 **/ 2036static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2037{ 2038 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2039 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2040 struct ibmvfc_cmd *tmf; 2041 struct ibmvfc_event *evt, *found_evt; 2042 union ibmvfc_iu rsp_iu; 2043 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 2044 int rsp_rc = -EBUSY; 2045 unsigned long flags; 2046 int rsp_code = 0; 2047 2048 spin_lock_irqsave(vhost->host->host_lock, flags); 2049 found_evt = NULL; 2050 list_for_each_entry(evt, &vhost->sent, queue) { 2051 if (evt->cmnd && evt->cmnd->device == sdev) { 2052 found_evt = evt; 2053 break; 2054 } 2055 } 2056 2057 if (!found_evt) { 2058 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2059 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2060 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2061 return 0; 2062 } 2063 2064 if (vhost->state == IBMVFC_ACTIVE) { 2065 evt = ibmvfc_get_event(vhost); 2066 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2067 2068 tmf = &evt->iu.cmd; 2069 memset(tmf, 0, sizeof(*tmf)); 2070 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 2071 tmf->resp.len = sizeof(tmf->rsp); 2072 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 2073 tmf->payload_len = sizeof(tmf->iu); 2074 tmf->resp_len = sizeof(tmf->rsp); 2075 tmf->cancel_key = (unsigned long)sdev->hostdata; 2076 tmf->tgt_scsi_id = rport->port_id; 2077 int_to_scsilun(sdev->lun, &tmf->iu.lun); 2078 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 2079 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 2080 evt->sync_iu = &rsp_iu; 2081 2082 init_completion(&evt->comp); 2083 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2084 } 2085 2086 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2087 2088 if (rsp_rc != 0) { 2089 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2090 return -EIO; 2091 } 2092 2093 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2094 wait_for_completion(&evt->comp); 2095 2096 if (rsp_iu.cmd.status) 2097 rsp_code = ibmvfc_get_err_result(&rsp_iu.cmd); 2098 2099 if (rsp_code) { 2100 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2101 rsp_code = fc_rsp->data.info.rsp_code; 2102 2103 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2104 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2105 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 2106 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 2107 fc_rsp->scsi_status); 2108 rsp_rc = -EIO; 2109 } else 2110 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2111 2112 spin_lock_irqsave(vhost->host->host_lock, flags); 2113 ibmvfc_free_event(evt); 2114 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2115 return rsp_rc; 2116} 2117 2118/** 2119 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2120 * @sdev: scsi device to cancel commands 2121 * @type: type of error recovery being performed 2122 * 2123 * This sends a cancel to the VIOS for the specified device. This does 2124 * NOT send any abort to the actual device. That must be done separately. 2125 * 2126 * Returns: 2127 * 0 on success / other on failure 2128 **/ 2129static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2130{ 2131 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2132 struct scsi_target *starget = scsi_target(sdev); 2133 struct fc_rport *rport = starget_to_rport(starget); 2134 struct ibmvfc_tmf *tmf; 2135 struct ibmvfc_event *evt, *found_evt; 2136 union ibmvfc_iu rsp; 2137 int rsp_rc = -EBUSY; 2138 unsigned long flags; 2139 u16 status; 2140 2141 ENTER; 2142 spin_lock_irqsave(vhost->host->host_lock, flags); 2143 found_evt = NULL; 2144 list_for_each_entry(evt, &vhost->sent, queue) { 2145 if (evt->cmnd && evt->cmnd->device == sdev) { 2146 found_evt = evt; 2147 break; 2148 } 2149 } 2150 2151 if (!found_evt) { 2152 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2153 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2154 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2155 return 0; 2156 } 2157 2158 if (vhost->state == IBMVFC_ACTIVE) { 2159 evt = ibmvfc_get_event(vhost); 2160 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2161 2162 tmf = &evt->iu.tmf; 2163 memset(tmf, 0, sizeof(*tmf)); 2164 tmf->common.version = 1; 2165 tmf->common.opcode = IBMVFC_TMF_MAD; 2166 tmf->common.length = sizeof(*tmf); 2167 tmf->scsi_id = rport->port_id; 2168 int_to_scsilun(sdev->lun, &tmf->lun); 2169 tmf->flags = (type | IBMVFC_TMF_LUA_VALID); 2170 tmf->cancel_key = (unsigned long)sdev->hostdata; 2171 tmf->my_cancel_key = (unsigned long)starget->hostdata; 2172 2173 evt->sync_iu = &rsp; 2174 init_completion(&evt->comp); 2175 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2176 } 2177 2178 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2179 2180 if (rsp_rc != 0) { 2181 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2182 return -EIO; 2183 } 2184 2185 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2186 2187 wait_for_completion(&evt->comp); 2188 status = rsp.mad_common.status; 2189 spin_lock_irqsave(vhost->host->host_lock, flags); 2190 ibmvfc_free_event(evt); 2191 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2192 2193 if (status != IBMVFC_MAD_SUCCESS) { 2194 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2195 return -EIO; 2196 } 2197 2198 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2199 return 0; 2200} 2201 2202/** 2203 * ibmvfc_match_target - Match function for specified target 2204 * @evt: ibmvfc event struct 2205 * @device: device to match (starget) 2206 * 2207 * Returns: 2208 * 1 if event matches starget / 0 if event does not match starget 2209 **/ 2210static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2211{ 2212 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2213 return 1; 2214 return 0; 2215} 2216 2217/** 2218 * ibmvfc_match_lun - Match function for specified LUN 2219 * @evt: ibmvfc event struct 2220 * @device: device to match (sdev) 2221 * 2222 * Returns: 2223 * 1 if event matches sdev / 0 if event does not match sdev 2224 **/ 2225static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2226{ 2227 if (evt->cmnd && evt->cmnd->device == device) 2228 return 1; 2229 return 0; 2230} 2231 2232/** 2233 * ibmvfc_wait_for_ops - Wait for ops to complete 2234 * @vhost: ibmvfc host struct 2235 * @device: device to match (starget or sdev) 2236 * @match: match function 2237 * 2238 * Returns: 2239 * SUCCESS / FAILED 2240 **/ 2241static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2242 int (*match) (struct ibmvfc_event *, void *)) 2243{ 2244 struct ibmvfc_event *evt; 2245 DECLARE_COMPLETION_ONSTACK(comp); 2246 int wait; 2247 unsigned long flags; 2248 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2249 2250 ENTER; 2251 do { 2252 wait = 0; 2253 spin_lock_irqsave(vhost->host->host_lock, flags); 2254 list_for_each_entry(evt, &vhost->sent, queue) { 2255 if (match(evt, device)) { 2256 evt->eh_comp = ∁ 2257 wait++; 2258 } 2259 } 2260 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2261 2262 if (wait) { 2263 timeout = wait_for_completion_timeout(&comp, timeout); 2264 2265 if (!timeout) { 2266 wait = 0; 2267 spin_lock_irqsave(vhost->host->host_lock, flags); 2268 list_for_each_entry(evt, &vhost->sent, queue) { 2269 if (match(evt, device)) { 2270 evt->eh_comp = NULL; 2271 wait++; 2272 } 2273 } 2274 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2275 if (wait) 2276 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2277 LEAVE; 2278 return wait ? FAILED : SUCCESS; 2279 } 2280 } 2281 } while (wait); 2282 2283 LEAVE; 2284 return SUCCESS; 2285} 2286 2287/** 2288 * ibmvfc_eh_abort_handler - Abort a command 2289 * @cmd: scsi command to abort 2290 * 2291 * Returns: 2292 * SUCCESS / FAILED 2293 **/ 2294static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2295{ 2296 struct scsi_device *sdev = cmd->device; 2297 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2298 int cancel_rc, abort_rc; 2299 int rc = FAILED; 2300 2301 ENTER; 2302 ibmvfc_wait_while_resetting(vhost); 2303 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2304 abort_rc = ibmvfc_abort_task_set(sdev); 2305 2306 if (!cancel_rc && !abort_rc) 2307 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2308 2309 LEAVE; 2310 return rc; 2311} 2312 2313/** 2314 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2315 * @cmd: scsi command struct 2316 * 2317 * Returns: 2318 * SUCCESS / FAILED 2319 **/ 2320static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2321{ 2322 struct scsi_device *sdev = cmd->device; 2323 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2324 int cancel_rc, reset_rc; 2325 int rc = FAILED; 2326 2327 ENTER; 2328 ibmvfc_wait_while_resetting(vhost); 2329 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2330 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2331 2332 if (!cancel_rc && !reset_rc) 2333 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2334 2335 LEAVE; 2336 return rc; 2337} 2338 2339/** 2340 * ibmvfc_dev_cancel_all_abts - Device iterated cancel all function 2341 * @sdev: scsi device struct 2342 * @data: return code 2343 * 2344 **/ 2345static void ibmvfc_dev_cancel_all_abts(struct scsi_device *sdev, void *data) 2346{ 2347 unsigned long *rc = data; 2348 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2349} 2350 2351/** 2352 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2353 * @sdev: scsi device struct 2354 * @data: return code 2355 * 2356 **/ 2357static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2358{ 2359 unsigned long *rc = data; 2360 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2361} 2362 2363/** 2364 * ibmvfc_dev_abort_all - Device iterated abort task set function 2365 * @sdev: scsi device struct 2366 * @data: return code 2367 * 2368 **/ 2369static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) 2370{ 2371 unsigned long *rc = data; 2372 *rc |= ibmvfc_abort_task_set(sdev); 2373} 2374 2375/** 2376 * ibmvfc_eh_target_reset_handler - Reset the target 2377 * @cmd: scsi command struct 2378 * 2379 * Returns: 2380 * SUCCESS / FAILED 2381 **/ 2382static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2383{ 2384 struct scsi_device *sdev = cmd->device; 2385 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2386 struct scsi_target *starget = scsi_target(sdev); 2387 int reset_rc; 2388 int rc = FAILED; 2389 unsigned long cancel_rc = 0; 2390 2391 ENTER; 2392 ibmvfc_wait_while_resetting(vhost); 2393 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2394 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2395 2396 if (!cancel_rc && !reset_rc) 2397 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2398 2399 LEAVE; 2400 return rc; 2401} 2402 2403/** 2404 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2405 * @cmd: struct scsi_cmnd having problems 2406 * 2407 **/ 2408static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2409{ 2410 int rc; 2411 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2412 2413 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2414 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2415 return rc ? FAILED : SUCCESS; 2416} 2417 2418/** 2419 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2420 * @rport: rport struct 2421 * 2422 * Return value: 2423 * none 2424 **/ 2425static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2426{ 2427 struct scsi_target *starget = to_scsi_target(&rport->dev); 2428 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2429 struct ibmvfc_host *vhost = shost_priv(shost); 2430 unsigned long cancel_rc = 0; 2431 unsigned long abort_rc = 0; 2432 int rc = FAILED; 2433 2434 ENTER; 2435 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_abts); 2436 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); 2437 2438 if (!cancel_rc && !abort_rc) 2439 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2440 2441 if (rc == FAILED) 2442 ibmvfc_issue_fc_host_lip(shost); 2443 LEAVE; 2444} 2445 2446static const struct { 2447 enum ibmvfc_async_event ae; 2448 const char *desc; 2449} ae_desc [] = { 2450 { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, 2451 { IBMVFC_AE_ELS_LOGO, "LOGO" }, 2452 { IBMVFC_AE_ELS_PRLO, "PRLO" }, 2453 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, 2454 { IBMVFC_AE_SCN_GROUP, "Group SCN" }, 2455 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, 2456 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, 2457 { IBMVFC_AE_LINK_UP, "Link Up" }, 2458 { IBMVFC_AE_LINK_DOWN, "Link Down" }, 2459 { IBMVFC_AE_LINK_DEAD, "Link Dead" }, 2460 { IBMVFC_AE_HALT, "Halt" }, 2461 { IBMVFC_AE_RESUME, "Resume" }, 2462 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, 2463}; 2464 2465static const char *unknown_ae = "Unknown async"; 2466 2467/** 2468 * ibmvfc_get_ae_desc - Get text description for async event 2469 * @ae: async event 2470 * 2471 **/ 2472static const char *ibmvfc_get_ae_desc(u64 ae) 2473{ 2474 int i; 2475 2476 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2477 if (ae_desc[i].ae == ae) 2478 return ae_desc[i].desc; 2479 2480 return unknown_ae; 2481} 2482 2483/** 2484 * ibmvfc_handle_async - Handle an async event from the adapter 2485 * @crq: crq to process 2486 * @vhost: ibmvfc host struct 2487 * 2488 **/ 2489static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2490 struct ibmvfc_host *vhost) 2491{ 2492 const char *desc = ibmvfc_get_ae_desc(crq->event); 2493 struct ibmvfc_target *tgt; 2494 2495 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx," 2496 " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name); 2497 2498 switch (crq->event) { 2499 case IBMVFC_AE_RESUME: 2500 switch (crq->link_state) { 2501 case IBMVFC_AE_LS_LINK_DOWN: 2502 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2503 break; 2504 case IBMVFC_AE_LS_LINK_DEAD: 2505 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2506 break; 2507 case IBMVFC_AE_LS_LINK_UP: 2508 case IBMVFC_AE_LS_LINK_BOUNCED: 2509 default: 2510 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2511 vhost->delay_init = 1; 2512 __ibmvfc_reset_host(vhost); 2513 break; 2514 }; 2515 2516 break; 2517 case IBMVFC_AE_LINK_UP: 2518 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2519 vhost->delay_init = 1; 2520 __ibmvfc_reset_host(vhost); 2521 break; 2522 case IBMVFC_AE_SCN_FABRIC: 2523 case IBMVFC_AE_SCN_DOMAIN: 2524 vhost->events_to_log |= IBMVFC_AE_RSCN; 2525 vhost->delay_init = 1; 2526 __ibmvfc_reset_host(vhost); 2527 break; 2528 case IBMVFC_AE_SCN_NPORT: 2529 case IBMVFC_AE_SCN_GROUP: 2530 vhost->events_to_log |= IBMVFC_AE_RSCN; 2531 ibmvfc_reinit_host(vhost); 2532 break; 2533 case IBMVFC_AE_ELS_LOGO: 2534 case IBMVFC_AE_ELS_PRLO: 2535 case IBMVFC_AE_ELS_PLOGI: 2536 list_for_each_entry(tgt, &vhost->targets, queue) { 2537 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 2538 break; 2539 if (crq->scsi_id && tgt->scsi_id != crq->scsi_id) 2540 continue; 2541 if (crq->wwpn && tgt->ids.port_name != crq->wwpn) 2542 continue; 2543 if (crq->node_name && tgt->ids.node_name != crq->node_name) 2544 continue; 2545 if (tgt->need_login && crq->event == IBMVFC_AE_ELS_LOGO) 2546 tgt->logo_rcvd = 1; 2547 if (!tgt->need_login || crq->event == IBMVFC_AE_ELS_PLOGI) { 2548 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2549 ibmvfc_reinit_host(vhost); 2550 } 2551 } 2552 break; 2553 case IBMVFC_AE_LINK_DOWN: 2554 case IBMVFC_AE_ADAPTER_FAILED: 2555 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2556 break; 2557 case IBMVFC_AE_LINK_DEAD: 2558 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2559 break; 2560 case IBMVFC_AE_HALT: 2561 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2562 break; 2563 default: 2564 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2565 break; 2566 }; 2567} 2568 2569/** 2570 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2571 * @crq: Command/Response queue 2572 * @vhost: ibmvfc host struct 2573 * 2574 **/ 2575static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2576{ 2577 long rc; 2578 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; 2579 2580 switch (crq->valid) { 2581 case IBMVFC_CRQ_INIT_RSP: 2582 switch (crq->format) { 2583 case IBMVFC_CRQ_INIT: 2584 dev_info(vhost->dev, "Partner initialized\n"); 2585 /* Send back a response */ 2586 rc = ibmvfc_send_crq_init_complete(vhost); 2587 if (rc == 0) 2588 ibmvfc_init_host(vhost); 2589 else 2590 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2591 break; 2592 case IBMVFC_CRQ_INIT_COMPLETE: 2593 dev_info(vhost->dev, "Partner initialization complete\n"); 2594 ibmvfc_init_host(vhost); 2595 break; 2596 default: 2597 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2598 } 2599 return; 2600 case IBMVFC_CRQ_XPORT_EVENT: 2601 vhost->state = IBMVFC_NO_CRQ; 2602 vhost->logged_in = 0; 2603 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2604 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2605 /* We need to re-setup the interpartition connection */ 2606 dev_info(vhost->dev, "Re-enabling adapter\n"); 2607 vhost->client_migrated = 1; 2608 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2609 if ((rc = ibmvfc_reenable_crq_queue(vhost)) || 2610 (rc = ibmvfc_send_crq_init(vhost))) { 2611 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2612 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); 2613 } else 2614 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2615 } else { 2616 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2617 2618 ibmvfc_purge_requests(vhost, DID_ERROR); 2619 if ((rc = ibmvfc_reset_crq(vhost)) || 2620 (rc = ibmvfc_send_crq_init(vhost))) { 2621 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2622 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); 2623 } else 2624 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2625 } 2626 return; 2627 case IBMVFC_CRQ_CMD_RSP: 2628 break; 2629 default: 2630 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2631 return; 2632 } 2633 2634 if (crq->format == IBMVFC_ASYNC_EVENT) 2635 return; 2636 2637 /* The only kind of payload CRQs we should get are responses to 2638 * things we send. Make sure this response is to something we 2639 * actually sent 2640 */ 2641 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2642 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2643 crq->ioba); 2644 return; 2645 } 2646 2647 if (unlikely(atomic_read(&evt->free))) { 2648 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2649 crq->ioba); 2650 return; 2651 } 2652 2653 del_timer(&evt->timer); 2654 list_del(&evt->queue); 2655 ibmvfc_trc_end(evt); 2656 evt->done(evt); 2657} 2658 2659/** 2660 * ibmvfc_scan_finished - Check if the device scan is done. 2661 * @shost: scsi host struct 2662 * @time: current elapsed time 2663 * 2664 * Returns: 2665 * 0 if scan is not done / 1 if scan is done 2666 **/ 2667static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2668{ 2669 unsigned long flags; 2670 struct ibmvfc_host *vhost = shost_priv(shost); 2671 int done = 0; 2672 2673 spin_lock_irqsave(shost->host_lock, flags); 2674 if (time >= (init_timeout * HZ)) { 2675 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2676 "continuing initialization\n", init_timeout); 2677 done = 1; 2678 } 2679 2680 if (vhost->scan_complete) 2681 done = 1; 2682 spin_unlock_irqrestore(shost->host_lock, flags); 2683 return done; 2684} 2685 2686/** 2687 * ibmvfc_slave_alloc - Setup the device's task set value 2688 * @sdev: struct scsi_device device to configure 2689 * 2690 * Set the device's task set value so that error handling works as 2691 * expected. 2692 * 2693 * Returns: 2694 * 0 on success / -ENXIO if device does not exist 2695 **/ 2696static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2697{ 2698 struct Scsi_Host *shost = sdev->host; 2699 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2700 struct ibmvfc_host *vhost = shost_priv(shost); 2701 unsigned long flags = 0; 2702 2703 if (!rport || fc_remote_port_chkready(rport)) 2704 return -ENXIO; 2705 2706 spin_lock_irqsave(shost->host_lock, flags); 2707 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2708 spin_unlock_irqrestore(shost->host_lock, flags); 2709 return 0; 2710} 2711 2712/** 2713 * ibmvfc_target_alloc - Setup the target's task set value 2714 * @starget: struct scsi_target 2715 * 2716 * Set the target's task set value so that error handling works as 2717 * expected. 2718 * 2719 * Returns: 2720 * 0 on success / -ENXIO if device does not exist 2721 **/ 2722static int ibmvfc_target_alloc(struct scsi_target *starget) 2723{ 2724 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2725 struct ibmvfc_host *vhost = shost_priv(shost); 2726 unsigned long flags = 0; 2727 2728 spin_lock_irqsave(shost->host_lock, flags); 2729 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2730 spin_unlock_irqrestore(shost->host_lock, flags); 2731 return 0; 2732} 2733 2734/** 2735 * ibmvfc_slave_configure - Configure the device 2736 * @sdev: struct scsi_device device to configure 2737 * 2738 * Enable allow_restart for a device if it is a disk. Adjust the 2739 * queue_depth here also. 2740 * 2741 * Returns: 2742 * 0 2743 **/ 2744static int ibmvfc_slave_configure(struct scsi_device *sdev) 2745{ 2746 struct Scsi_Host *shost = sdev->host; 2747 struct fc_rport *rport = starget_to_rport(sdev->sdev_target); 2748 unsigned long flags = 0; 2749 2750 spin_lock_irqsave(shost->host_lock, flags); 2751 if (sdev->type == TYPE_DISK) 2752 sdev->allow_restart = 1; 2753 2754 if (sdev->tagged_supported) { 2755 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 2756 scsi_activate_tcq(sdev, sdev->queue_depth); 2757 } else 2758 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2759 2760 rport->dev_loss_tmo = dev_loss_tmo; 2761 spin_unlock_irqrestore(shost->host_lock, flags); 2762 return 0; 2763} 2764 2765/** 2766 * ibmvfc_change_queue_depth - Change the device's queue depth 2767 * @sdev: scsi device struct 2768 * @qdepth: depth to set 2769 * @reason: calling context 2770 * 2771 * Return value: 2772 * actual depth set 2773 **/ 2774static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth, 2775 int reason) 2776{ 2777 if (reason != SCSI_QDEPTH_DEFAULT) 2778 return -EOPNOTSUPP; 2779 2780 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2781 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2782 2783 scsi_adjust_queue_depth(sdev, 0, qdepth); 2784 return sdev->queue_depth; 2785} 2786 2787/** 2788 * ibmvfc_change_queue_type - Change the device's queue type 2789 * @sdev: scsi device struct 2790 * @tag_type: type of tags to use 2791 * 2792 * Return value: 2793 * actual queue type set 2794 **/ 2795static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) 2796{ 2797 if (sdev->tagged_supported) { 2798 scsi_set_tag_type(sdev, tag_type); 2799 2800 if (tag_type) 2801 scsi_activate_tcq(sdev, sdev->queue_depth); 2802 else 2803 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2804 } else 2805 tag_type = 0; 2806 2807 return tag_type; 2808} 2809 2810static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2811 struct device_attribute *attr, char *buf) 2812{ 2813 struct Scsi_Host *shost = class_to_shost(dev); 2814 struct ibmvfc_host *vhost = shost_priv(shost); 2815 2816 return snprintf(buf, PAGE_SIZE, "%s\n", 2817 vhost->login_buf->resp.partition_name); 2818} 2819 2820static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2821 struct device_attribute *attr, char *buf) 2822{ 2823 struct Scsi_Host *shost = class_to_shost(dev); 2824 struct ibmvfc_host *vhost = shost_priv(shost); 2825 2826 return snprintf(buf, PAGE_SIZE, "%s\n", 2827 vhost->login_buf->resp.device_name); 2828} 2829 2830static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2831 struct device_attribute *attr, char *buf) 2832{ 2833 struct Scsi_Host *shost = class_to_shost(dev); 2834 struct ibmvfc_host *vhost = shost_priv(shost); 2835 2836 return snprintf(buf, PAGE_SIZE, "%s\n", 2837 vhost->login_buf->resp.port_loc_code); 2838} 2839 2840static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2841 struct device_attribute *attr, char *buf) 2842{ 2843 struct Scsi_Host *shost = class_to_shost(dev); 2844 struct ibmvfc_host *vhost = shost_priv(shost); 2845 2846 return snprintf(buf, PAGE_SIZE, "%s\n", 2847 vhost->login_buf->resp.drc_name); 2848} 2849 2850static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2851 struct device_attribute *attr, char *buf) 2852{ 2853 struct Scsi_Host *shost = class_to_shost(dev); 2854 struct ibmvfc_host *vhost = shost_priv(shost); 2855 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2856} 2857 2858static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 2859 struct device_attribute *attr, char *buf) 2860{ 2861 struct Scsi_Host *shost = class_to_shost(dev); 2862 struct ibmvfc_host *vhost = shost_priv(shost); 2863 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); 2864} 2865 2866/** 2867 * ibmvfc_show_log_level - Show the adapter's error logging level 2868 * @dev: class device struct 2869 * @buf: buffer 2870 * 2871 * Return value: 2872 * number of bytes printed to buffer 2873 **/ 2874static ssize_t ibmvfc_show_log_level(struct device *dev, 2875 struct device_attribute *attr, char *buf) 2876{ 2877 struct Scsi_Host *shost = class_to_shost(dev); 2878 struct ibmvfc_host *vhost = shost_priv(shost); 2879 unsigned long flags = 0; 2880 int len; 2881 2882 spin_lock_irqsave(shost->host_lock, flags); 2883 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2884 spin_unlock_irqrestore(shost->host_lock, flags); 2885 return len; 2886} 2887 2888/** 2889 * ibmvfc_store_log_level - Change the adapter's error logging level 2890 * @dev: class device struct 2891 * @buf: buffer 2892 * 2893 * Return value: 2894 * number of bytes printed to buffer 2895 **/ 2896static ssize_t ibmvfc_store_log_level(struct device *dev, 2897 struct device_attribute *attr, 2898 const char *buf, size_t count) 2899{ 2900 struct Scsi_Host *shost = class_to_shost(dev); 2901 struct ibmvfc_host *vhost = shost_priv(shost); 2902 unsigned long flags = 0; 2903 2904 spin_lock_irqsave(shost->host_lock, flags); 2905 vhost->log_level = simple_strtoul(buf, NULL, 10); 2906 spin_unlock_irqrestore(shost->host_lock, flags); 2907 return strlen(buf); 2908} 2909 2910static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 2911static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 2912static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 2913static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 2914static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 2915static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 2916static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 2917 ibmvfc_show_log_level, ibmvfc_store_log_level); 2918 2919#ifdef CONFIG_SCSI_IBMVFC_TRACE 2920/** 2921 * ibmvfc_read_trace - Dump the adapter trace 2922 * @kobj: kobject struct 2923 * @bin_attr: bin_attribute struct 2924 * @buf: buffer 2925 * @off: offset 2926 * @count: buffer size 2927 * 2928 * Return value: 2929 * number of bytes printed to buffer 2930 **/ 2931static ssize_t ibmvfc_read_trace(struct kobject *kobj, 2932 struct bin_attribute *bin_attr, 2933 char *buf, loff_t off, size_t count) 2934{ 2935 struct device *dev = container_of(kobj, struct device, kobj); 2936 struct Scsi_Host *shost = class_to_shost(dev); 2937 struct ibmvfc_host *vhost = shost_priv(shost); 2938 unsigned long flags = 0; 2939 int size = IBMVFC_TRACE_SIZE; 2940 char *src = (char *)vhost->trace; 2941 2942 if (off > size) 2943 return 0; 2944 if (off + count > size) { 2945 size -= off; 2946 count = size; 2947 } 2948 2949 spin_lock_irqsave(shost->host_lock, flags); 2950 memcpy(buf, &src[off], count); 2951 spin_unlock_irqrestore(shost->host_lock, flags); 2952 return count; 2953} 2954 2955static struct bin_attribute ibmvfc_trace_attr = { 2956 .attr = { 2957 .name = "trace", 2958 .mode = S_IRUGO, 2959 }, 2960 .size = 0, 2961 .read = ibmvfc_read_trace, 2962}; 2963#endif 2964 2965static struct device_attribute *ibmvfc_attrs[] = { 2966 &dev_attr_partition_name, 2967 &dev_attr_device_name, 2968 &dev_attr_port_loc_code, 2969 &dev_attr_drc_name, 2970 &dev_attr_npiv_version, 2971 &dev_attr_capabilities, 2972 &dev_attr_log_level, 2973 NULL 2974}; 2975 2976static struct scsi_host_template driver_template = { 2977 .module = THIS_MODULE, 2978 .name = "IBM POWER Virtual FC Adapter", 2979 .proc_name = IBMVFC_NAME, 2980 .queuecommand = ibmvfc_queuecommand, 2981 .eh_abort_handler = ibmvfc_eh_abort_handler, 2982 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 2983 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 2984 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 2985 .slave_alloc = ibmvfc_slave_alloc, 2986 .slave_configure = ibmvfc_slave_configure, 2987 .target_alloc = ibmvfc_target_alloc, 2988 .scan_finished = ibmvfc_scan_finished, 2989 .change_queue_depth = ibmvfc_change_queue_depth, 2990 .change_queue_type = ibmvfc_change_queue_type, 2991 .cmd_per_lun = 16, 2992 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 2993 .this_id = -1, 2994 .sg_tablesize = SG_ALL, 2995 .max_sectors = IBMVFC_MAX_SECTORS, 2996 .use_clustering = ENABLE_CLUSTERING, 2997 .shost_attrs = ibmvfc_attrs, 2998}; 2999 3000/** 3001 * ibmvfc_next_async_crq - Returns the next entry in async queue 3002 * @vhost: ibmvfc host struct 3003 * 3004 * Returns: 3005 * Pointer to next entry in queue / NULL if empty 3006 **/ 3007static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3008{ 3009 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 3010 struct ibmvfc_async_crq *crq; 3011 3012 crq = &async_crq->msgs[async_crq->cur]; 3013 if (crq->valid & 0x80) { 3014 if (++async_crq->cur == async_crq->size) 3015 async_crq->cur = 0; 3016 rmb(); 3017 } else 3018 crq = NULL; 3019 3020 return crq; 3021} 3022 3023/** 3024 * ibmvfc_next_crq - Returns the next entry in message queue 3025 * @vhost: ibmvfc host struct 3026 * 3027 * Returns: 3028 * Pointer to next entry in queue / NULL if empty 3029 **/ 3030static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3031{ 3032 struct ibmvfc_crq_queue *queue = &vhost->crq; 3033 struct ibmvfc_crq *crq; 3034 3035 crq = &queue->msgs[queue->cur]; 3036 if (crq->valid & 0x80) { 3037 if (++queue->cur == queue->size) 3038 queue->cur = 0; 3039 rmb(); 3040 } else 3041 crq = NULL; 3042 3043 return crq; 3044} 3045 3046/** 3047 * ibmvfc_interrupt - Interrupt handler 3048 * @irq: number of irq to handle, not used 3049 * @dev_instance: ibmvfc_host that received interrupt 3050 * 3051 * Returns: 3052 * IRQ_HANDLED 3053 **/ 3054static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3055{ 3056 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3057 unsigned long flags; 3058 3059 spin_lock_irqsave(vhost->host->host_lock, flags); 3060 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3061 tasklet_schedule(&vhost->tasklet); 3062 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3063 return IRQ_HANDLED; 3064} 3065 3066/** 3067 * ibmvfc_tasklet - Interrupt handler tasklet 3068 * @data: ibmvfc host struct 3069 * 3070 * Returns: 3071 * Nothing 3072 **/ 3073static void ibmvfc_tasklet(void *data) 3074{ 3075 struct ibmvfc_host *vhost = data; 3076 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3077 struct ibmvfc_crq *crq; 3078 struct ibmvfc_async_crq *async; 3079 unsigned long flags; 3080 int done = 0; 3081 3082 spin_lock_irqsave(vhost->host->host_lock, flags); 3083 while (!done) { 3084 /* Pull all the valid messages off the async CRQ */ 3085 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3086 ibmvfc_handle_async(async, vhost); 3087 async->valid = 0; 3088 wmb(); 3089 } 3090 3091 /* Pull all the valid messages off the CRQ */ 3092 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3093 ibmvfc_handle_crq(crq, vhost); 3094 crq->valid = 0; 3095 wmb(); 3096 } 3097 3098 vio_enable_interrupts(vdev); 3099 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3100 vio_disable_interrupts(vdev); 3101 ibmvfc_handle_async(async, vhost); 3102 async->valid = 0; 3103 wmb(); 3104 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3105 vio_disable_interrupts(vdev); 3106 ibmvfc_handle_crq(crq, vhost); 3107 crq->valid = 0; 3108 wmb(); 3109 } else 3110 done = 1; 3111 } 3112 3113 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3114} 3115 3116/** 3117 * ibmvfc_init_tgt - Set the next init job step for the target 3118 * @tgt: ibmvfc target struct 3119 * @job_step: job step to perform 3120 * 3121 **/ 3122static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3123 void (*job_step) (struct ibmvfc_target *)) 3124{ 3125 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 3126 tgt->job_step = job_step; 3127 wake_up(&tgt->vhost->work_wait_q); 3128} 3129 3130/** 3131 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3132 * @tgt: ibmvfc target struct 3133 * @job_step: initialization job step 3134 * 3135 * Returns: 1 if step will be retried / 0 if not 3136 * 3137 **/ 3138static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3139 void (*job_step) (struct ibmvfc_target *)) 3140{ 3141 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3142 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3143 wake_up(&tgt->vhost->work_wait_q); 3144 return 0; 3145 } else 3146 ibmvfc_init_tgt(tgt, job_step); 3147 return 1; 3148} 3149 3150/* Defined in FC-LS */ 3151static const struct { 3152 int code; 3153 int retry; 3154 int logged_in; 3155} prli_rsp [] = { 3156 { 0, 1, 0 }, 3157 { 1, 0, 1 }, 3158 { 2, 1, 0 }, 3159 { 3, 1, 0 }, 3160 { 4, 0, 0 }, 3161 { 5, 0, 0 }, 3162 { 6, 0, 1 }, 3163 { 7, 0, 0 }, 3164 { 8, 1, 0 }, 3165}; 3166 3167/** 3168 * ibmvfc_get_prli_rsp - Find PRLI response index 3169 * @flags: PRLI response flags 3170 * 3171 **/ 3172static int ibmvfc_get_prli_rsp(u16 flags) 3173{ 3174 int i; 3175 int code = (flags & 0x0f00) >> 8; 3176 3177 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3178 if (prli_rsp[i].code == code) 3179 return i; 3180 3181 return 0; 3182} 3183 3184/** 3185 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3186 * @evt: ibmvfc event struct 3187 * 3188 **/ 3189static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3190{ 3191 struct ibmvfc_target *tgt = evt->tgt; 3192 struct ibmvfc_host *vhost = evt->vhost; 3193 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3194 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3195 u32 status = rsp->common.status; 3196 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3197 3198 vhost->discovery_threads--; 3199 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3200 switch (status) { 3201 case IBMVFC_MAD_SUCCESS: 3202 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3203 parms->type, parms->flags, parms->service_parms); 3204 3205 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3206 index = ibmvfc_get_prli_rsp(parms->flags); 3207 if (prli_rsp[index].logged_in) { 3208 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) { 3209 tgt->need_login = 0; 3210 tgt->ids.roles = 0; 3211 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC) 3212 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3213 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC) 3214 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3215 tgt->add_rport = 1; 3216 } else 3217 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3218 } else if (prli_rsp[index].retry) 3219 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3220 else 3221 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3222 } else 3223 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3224 break; 3225 case IBMVFC_MAD_DRIVER_FAILED: 3226 break; 3227 case IBMVFC_MAD_CRQ_ERROR: 3228 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3229 break; 3230 case IBMVFC_MAD_FAILED: 3231 default: 3232 if ((rsp->status & IBMVFC_VIOS_FAILURE) && rsp->error == IBMVFC_PLOGI_REQUIRED) 3233 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3234 else if (tgt->logo_rcvd) 3235 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3236 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3237 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3238 else 3239 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3240 3241 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3242 ibmvfc_get_cmd_error(rsp->status, rsp->error), 3243 rsp->status, rsp->error, status); 3244 break; 3245 }; 3246 3247 kref_put(&tgt->kref, ibmvfc_release_tgt); 3248 ibmvfc_free_event(evt); 3249 wake_up(&vhost->work_wait_q); 3250} 3251 3252/** 3253 * ibmvfc_tgt_send_prli - Send a process login 3254 * @tgt: ibmvfc target struct 3255 * 3256 **/ 3257static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3258{ 3259 struct ibmvfc_process_login *prli; 3260 struct ibmvfc_host *vhost = tgt->vhost; 3261 struct ibmvfc_event *evt; 3262 3263 if (vhost->discovery_threads >= disc_threads) 3264 return; 3265 3266 kref_get(&tgt->kref); 3267 evt = ibmvfc_get_event(vhost); 3268 vhost->discovery_threads++; 3269 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 3270 evt->tgt = tgt; 3271 prli = &evt->iu.prli; 3272 memset(prli, 0, sizeof(*prli)); 3273 prli->common.version = 1; 3274 prli->common.opcode = IBMVFC_PROCESS_LOGIN; 3275 prli->common.length = sizeof(*prli); 3276 prli->scsi_id = tgt->scsi_id; 3277 3278 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 3279 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; 3280 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; 3281 3282 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3283 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3284 vhost->discovery_threads--; 3285 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3286 kref_put(&tgt->kref, ibmvfc_release_tgt); 3287 } else 3288 tgt_dbg(tgt, "Sent process login\n"); 3289} 3290 3291/** 3292 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 3293 * @evt: ibmvfc event struct 3294 * 3295 **/ 3296static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 3297{ 3298 struct ibmvfc_target *tgt = evt->tgt; 3299 struct ibmvfc_host *vhost = evt->vhost; 3300 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 3301 u32 status = rsp->common.status; 3302 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3303 3304 vhost->discovery_threads--; 3305 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3306 switch (status) { 3307 case IBMVFC_MAD_SUCCESS: 3308 tgt_dbg(tgt, "Port Login succeeded\n"); 3309 if (tgt->ids.port_name && 3310 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 3311 vhost->reinit = 1; 3312 tgt_dbg(tgt, "Port re-init required\n"); 3313 break; 3314 } 3315 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3316 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3317 tgt->ids.port_id = tgt->scsi_id; 3318 memcpy(&tgt->service_parms, &rsp->service_parms, 3319 sizeof(tgt->service_parms)); 3320 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3321 sizeof(tgt->service_parms_change)); 3322 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3323 break; 3324 case IBMVFC_MAD_DRIVER_FAILED: 3325 break; 3326 case IBMVFC_MAD_CRQ_ERROR: 3327 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3328 break; 3329 case IBMVFC_MAD_FAILED: 3330 default: 3331 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3332 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3333 else 3334 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3335 3336 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3337 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3338 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3339 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); 3340 break; 3341 }; 3342 3343 kref_put(&tgt->kref, ibmvfc_release_tgt); 3344 ibmvfc_free_event(evt); 3345 wake_up(&vhost->work_wait_q); 3346} 3347 3348/** 3349 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3350 * @tgt: ibmvfc target struct 3351 * 3352 **/ 3353static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3354{ 3355 struct ibmvfc_port_login *plogi; 3356 struct ibmvfc_host *vhost = tgt->vhost; 3357 struct ibmvfc_event *evt; 3358 3359 if (vhost->discovery_threads >= disc_threads) 3360 return; 3361 3362 kref_get(&tgt->kref); 3363 tgt->logo_rcvd = 0; 3364 evt = ibmvfc_get_event(vhost); 3365 vhost->discovery_threads++; 3366 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3367 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3368 evt->tgt = tgt; 3369 plogi = &evt->iu.plogi; 3370 memset(plogi, 0, sizeof(*plogi)); 3371 plogi->common.version = 1; 3372 plogi->common.opcode = IBMVFC_PORT_LOGIN; 3373 plogi->common.length = sizeof(*plogi); 3374 plogi->scsi_id = tgt->scsi_id; 3375 3376 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3377 vhost->discovery_threads--; 3378 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3379 kref_put(&tgt->kref, ibmvfc_release_tgt); 3380 } else 3381 tgt_dbg(tgt, "Sent port login\n"); 3382} 3383 3384/** 3385 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3386 * @evt: ibmvfc event struct 3387 * 3388 **/ 3389static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3390{ 3391 struct ibmvfc_target *tgt = evt->tgt; 3392 struct ibmvfc_host *vhost = evt->vhost; 3393 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3394 u32 status = rsp->common.status; 3395 3396 vhost->discovery_threads--; 3397 ibmvfc_free_event(evt); 3398 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3399 3400 switch (status) { 3401 case IBMVFC_MAD_SUCCESS: 3402 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3403 break; 3404 case IBMVFC_MAD_DRIVER_FAILED: 3405 kref_put(&tgt->kref, ibmvfc_release_tgt); 3406 wake_up(&vhost->work_wait_q); 3407 return; 3408 case IBMVFC_MAD_FAILED: 3409 default: 3410 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3411 break; 3412 }; 3413 3414 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3415 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3416 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3417 tgt->scsi_id != tgt->new_scsi_id) 3418 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3419 kref_put(&tgt->kref, ibmvfc_release_tgt); 3420 wake_up(&vhost->work_wait_q); 3421} 3422 3423/** 3424 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3425 * @tgt: ibmvfc target struct 3426 * 3427 **/ 3428static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3429{ 3430 struct ibmvfc_implicit_logout *mad; 3431 struct ibmvfc_host *vhost = tgt->vhost; 3432 struct ibmvfc_event *evt; 3433 3434 if (vhost->discovery_threads >= disc_threads) 3435 return; 3436 3437 kref_get(&tgt->kref); 3438 evt = ibmvfc_get_event(vhost); 3439 vhost->discovery_threads++; 3440 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3441 evt->tgt = tgt; 3442 mad = &evt->iu.implicit_logout; 3443 memset(mad, 0, sizeof(*mad)); 3444 mad->common.version = 1; 3445 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; 3446 mad->common.length = sizeof(*mad); 3447 mad->old_scsi_id = tgt->scsi_id; 3448 3449 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3450 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3451 vhost->discovery_threads--; 3452 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3453 kref_put(&tgt->kref, ibmvfc_release_tgt); 3454 } else 3455 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3456} 3457 3458/** 3459 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3460 * @mad: ibmvfc passthru mad struct 3461 * @tgt: ibmvfc target struct 3462 * 3463 * Returns: 3464 * 1 if PLOGI needed / 0 if PLOGI not needed 3465 **/ 3466static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3467 struct ibmvfc_target *tgt) 3468{ 3469 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3470 sizeof(tgt->ids.port_name))) 3471 return 1; 3472 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3473 sizeof(tgt->ids.node_name))) 3474 return 1; 3475 if (mad->fc_iu.response[6] != tgt->scsi_id) 3476 return 1; 3477 return 0; 3478} 3479 3480/** 3481 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3482 * @evt: ibmvfc event struct 3483 * 3484 **/ 3485static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3486{ 3487 struct ibmvfc_target *tgt = evt->tgt; 3488 struct ibmvfc_host *vhost = evt->vhost; 3489 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3490 u32 status = mad->common.status; 3491 u8 fc_reason, fc_explain; 3492 3493 vhost->discovery_threads--; 3494 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3495 del_timer(&tgt->timer); 3496 3497 switch (status) { 3498 case IBMVFC_MAD_SUCCESS: 3499 tgt_dbg(tgt, "ADISC succeeded\n"); 3500 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3501 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3502 break; 3503 case IBMVFC_MAD_DRIVER_FAILED: 3504 break; 3505 case IBMVFC_MAD_FAILED: 3506 default: 3507 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3508 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; 3509 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; 3510 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3511 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), 3512 mad->iu.status, mad->iu.error, 3513 ibmvfc_get_fc_type(fc_reason), fc_reason, 3514 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3515 break; 3516 }; 3517 3518 kref_put(&tgt->kref, ibmvfc_release_tgt); 3519 ibmvfc_free_event(evt); 3520 wake_up(&vhost->work_wait_q); 3521} 3522 3523/** 3524 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3525 * @evt: ibmvfc event struct 3526 * 3527 **/ 3528static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3529{ 3530 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3531 3532 memset(mad, 0, sizeof(*mad)); 3533 mad->common.version = 1; 3534 mad->common.opcode = IBMVFC_PASSTHRU; 3535 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 3536 mad->cmd_ioba.va = (u64)evt->crq.ioba + 3537 offsetof(struct ibmvfc_passthru_mad, iu); 3538 mad->cmd_ioba.len = sizeof(mad->iu); 3539 mad->iu.cmd_len = sizeof(mad->fc_iu.payload); 3540 mad->iu.rsp_len = sizeof(mad->fc_iu.response); 3541 mad->iu.cmd.va = (u64)evt->crq.ioba + 3542 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3543 offsetof(struct ibmvfc_passthru_fc_iu, payload); 3544 mad->iu.cmd.len = sizeof(mad->fc_iu.payload); 3545 mad->iu.rsp.va = (u64)evt->crq.ioba + 3546 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3547 offsetof(struct ibmvfc_passthru_fc_iu, response); 3548 mad->iu.rsp.len = sizeof(mad->fc_iu.response); 3549} 3550 3551/** 3552 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3553 * @evt: ibmvfc event struct 3554 * 3555 * Just cleanup this event struct. Everything else is handled by 3556 * the ADISC completion handler. If the ADISC never actually comes 3557 * back, we still have the timer running on the ADISC event struct 3558 * which will fire and cause the CRQ to get reset. 3559 * 3560 **/ 3561static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3562{ 3563 struct ibmvfc_host *vhost = evt->vhost; 3564 struct ibmvfc_target *tgt = evt->tgt; 3565 3566 tgt_dbg(tgt, "ADISC cancel complete\n"); 3567 vhost->abort_threads--; 3568 ibmvfc_free_event(evt); 3569 kref_put(&tgt->kref, ibmvfc_release_tgt); 3570 wake_up(&vhost->work_wait_q); 3571} 3572 3573/** 3574 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3575 * @tgt: ibmvfc target struct 3576 * 3577 * If an ADISC times out, send a cancel. If the cancel times 3578 * out, reset the CRQ. When the ADISC comes back as cancelled, 3579 * log back into the target. 3580 **/ 3581static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) 3582{ 3583 struct ibmvfc_host *vhost = tgt->vhost; 3584 struct ibmvfc_event *evt; 3585 struct ibmvfc_tmf *tmf; 3586 unsigned long flags; 3587 int rc; 3588 3589 tgt_dbg(tgt, "ADISC timeout\n"); 3590 spin_lock_irqsave(vhost->host->host_lock, flags); 3591 if (vhost->abort_threads >= disc_threads || 3592 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3593 vhost->state != IBMVFC_INITIALIZING || 3594 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3595 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3596 return; 3597 } 3598 3599 vhost->abort_threads++; 3600 kref_get(&tgt->kref); 3601 evt = ibmvfc_get_event(vhost); 3602 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3603 3604 evt->tgt = tgt; 3605 tmf = &evt->iu.tmf; 3606 memset(tmf, 0, sizeof(*tmf)); 3607 tmf->common.version = 1; 3608 tmf->common.opcode = IBMVFC_TMF_MAD; 3609 tmf->common.length = sizeof(*tmf); 3610 tmf->scsi_id = tgt->scsi_id; 3611 tmf->cancel_key = tgt->cancel_key; 3612 3613 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3614 3615 if (rc) { 3616 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3617 vhost->abort_threads--; 3618 kref_put(&tgt->kref, ibmvfc_release_tgt); 3619 __ibmvfc_reset_host(vhost); 3620 } else 3621 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3622 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3623} 3624 3625/** 3626 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3627 * @tgt: ibmvfc target struct 3628 * 3629 * When sending an ADISC we end up with two timers running. The 3630 * first timer is the timer in the ibmvfc target struct. If this 3631 * fires, we send a cancel to the target. The second timer is the 3632 * timer on the ibmvfc event for the ADISC, which is longer. If that 3633 * fires, it means the ADISC timed out and our attempt to cancel it 3634 * also failed, so we need to reset the CRQ. 3635 **/ 3636static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3637{ 3638 struct ibmvfc_passthru_mad *mad; 3639 struct ibmvfc_host *vhost = tgt->vhost; 3640 struct ibmvfc_event *evt; 3641 3642 if (vhost->discovery_threads >= disc_threads) 3643 return; 3644 3645 kref_get(&tgt->kref); 3646 evt = ibmvfc_get_event(vhost); 3647 vhost->discovery_threads++; 3648 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3649 evt->tgt = tgt; 3650 3651 ibmvfc_init_passthru(evt); 3652 mad = &evt->iu.passthru; 3653 mad->iu.flags = IBMVFC_FC_ELS; 3654 mad->iu.scsi_id = tgt->scsi_id; 3655 mad->iu.cancel_key = tgt->cancel_key; 3656 3657 mad->fc_iu.payload[0] = IBMVFC_ADISC; 3658 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3659 sizeof(vhost->login_buf->resp.port_name)); 3660 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3661 sizeof(vhost->login_buf->resp.node_name)); 3662 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; 3663 3664 if (timer_pending(&tgt->timer)) 3665 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3666 else { 3667 tgt->timer.data = (unsigned long) tgt; 3668 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3669 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; 3670 add_timer(&tgt->timer); 3671 } 3672 3673 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3674 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3675 vhost->discovery_threads--; 3676 del_timer(&tgt->timer); 3677 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3678 kref_put(&tgt->kref, ibmvfc_release_tgt); 3679 } else 3680 tgt_dbg(tgt, "Sent ADISC\n"); 3681} 3682 3683/** 3684 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3685 * @evt: ibmvfc event struct 3686 * 3687 **/ 3688static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3689{ 3690 struct ibmvfc_target *tgt = evt->tgt; 3691 struct ibmvfc_host *vhost = evt->vhost; 3692 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3693 u32 status = rsp->common.status; 3694 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3695 3696 vhost->discovery_threads--; 3697 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3698 switch (status) { 3699 case IBMVFC_MAD_SUCCESS: 3700 tgt_dbg(tgt, "Query Target succeeded\n"); 3701 tgt->new_scsi_id = rsp->scsi_id; 3702 if (rsp->scsi_id != tgt->scsi_id) 3703 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3704 else 3705 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3706 break; 3707 case IBMVFC_MAD_DRIVER_FAILED: 3708 break; 3709 case IBMVFC_MAD_CRQ_ERROR: 3710 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3711 break; 3712 case IBMVFC_MAD_FAILED: 3713 default: 3714 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3715 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && 3716 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) 3717 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3718 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3719 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3720 else 3721 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3722 3723 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3724 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3725 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3726 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); 3727 break; 3728 }; 3729 3730 kref_put(&tgt->kref, ibmvfc_release_tgt); 3731 ibmvfc_free_event(evt); 3732 wake_up(&vhost->work_wait_q); 3733} 3734 3735/** 3736 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3737 * @tgt: ibmvfc target struct 3738 * 3739 **/ 3740static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3741{ 3742 struct ibmvfc_query_tgt *query_tgt; 3743 struct ibmvfc_host *vhost = tgt->vhost; 3744 struct ibmvfc_event *evt; 3745 3746 if (vhost->discovery_threads >= disc_threads) 3747 return; 3748 3749 kref_get(&tgt->kref); 3750 evt = ibmvfc_get_event(vhost); 3751 vhost->discovery_threads++; 3752 evt->tgt = tgt; 3753 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3754 query_tgt = &evt->iu.query_tgt; 3755 memset(query_tgt, 0, sizeof(*query_tgt)); 3756 query_tgt->common.version = 1; 3757 query_tgt->common.opcode = IBMVFC_QUERY_TARGET; 3758 query_tgt->common.length = sizeof(*query_tgt); 3759 query_tgt->wwpn = tgt->ids.port_name; 3760 3761 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3762 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3763 vhost->discovery_threads--; 3764 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3765 kref_put(&tgt->kref, ibmvfc_release_tgt); 3766 } else 3767 tgt_dbg(tgt, "Sent Query Target\n"); 3768} 3769 3770/** 3771 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3772 * @vhost: ibmvfc host struct 3773 * @scsi_id: SCSI ID to allocate target for 3774 * 3775 * Returns: 3776 * 0 on success / other on failure 3777 **/ 3778static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3779{ 3780 struct ibmvfc_target *tgt; 3781 unsigned long flags; 3782 3783 spin_lock_irqsave(vhost->host->host_lock, flags); 3784 list_for_each_entry(tgt, &vhost->targets, queue) { 3785 if (tgt->scsi_id == scsi_id) { 3786 if (tgt->need_login) 3787 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3788 goto unlock_out; 3789 } 3790 } 3791 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3792 3793 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3794 if (!tgt) { 3795 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", 3796 scsi_id); 3797 return -ENOMEM; 3798 } 3799 3800 memset(tgt, 0, sizeof(*tgt)); 3801 tgt->scsi_id = scsi_id; 3802 tgt->new_scsi_id = scsi_id; 3803 tgt->vhost = vhost; 3804 tgt->need_login = 1; 3805 tgt->cancel_key = vhost->task_set++; 3806 init_timer(&tgt->timer); 3807 kref_init(&tgt->kref); 3808 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3809 spin_lock_irqsave(vhost->host->host_lock, flags); 3810 list_add_tail(&tgt->queue, &vhost->targets); 3811 3812unlock_out: 3813 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3814 return 0; 3815} 3816 3817/** 3818 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3819 * @vhost: ibmvfc host struct 3820 * 3821 * Returns: 3822 * 0 on success / other on failure 3823 **/ 3824static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3825{ 3826 int i, rc; 3827 3828 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3829 rc = ibmvfc_alloc_target(vhost, 3830 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); 3831 3832 return rc; 3833} 3834 3835/** 3836 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3837 * @evt: ibmvfc event struct 3838 * 3839 **/ 3840static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3841{ 3842 struct ibmvfc_host *vhost = evt->vhost; 3843 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3844 u32 mad_status = rsp->common.status; 3845 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3846 3847 switch (mad_status) { 3848 case IBMVFC_MAD_SUCCESS: 3849 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3850 vhost->num_targets = rsp->num_written; 3851 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3852 break; 3853 case IBMVFC_MAD_FAILED: 3854 level += ibmvfc_retry_host_init(vhost); 3855 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 3856 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3857 break; 3858 case IBMVFC_MAD_DRIVER_FAILED: 3859 break; 3860 default: 3861 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3862 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3863 break; 3864 } 3865 3866 ibmvfc_free_event(evt); 3867 wake_up(&vhost->work_wait_q); 3868} 3869 3870/** 3871 * ibmvfc_discover_targets - Send Discover Targets MAD 3872 * @vhost: ibmvfc host struct 3873 * 3874 **/ 3875static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3876{ 3877 struct ibmvfc_discover_targets *mad; 3878 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3879 3880 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3881 mad = &evt->iu.discover_targets; 3882 memset(mad, 0, sizeof(*mad)); 3883 mad->common.version = 1; 3884 mad->common.opcode = IBMVFC_DISC_TARGETS; 3885 mad->common.length = sizeof(*mad); 3886 mad->bufflen = vhost->disc_buf_sz; 3887 mad->buffer.va = vhost->disc_buf_dma; 3888 mad->buffer.len = vhost->disc_buf_sz; 3889 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3890 3891 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3892 ibmvfc_dbg(vhost, "Sent discover targets\n"); 3893 else 3894 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3895} 3896 3897/** 3898 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 3899 * @evt: ibmvfc event struct 3900 * 3901 **/ 3902static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 3903{ 3904 struct ibmvfc_host *vhost = evt->vhost; 3905 u32 mad_status = evt->xfer_iu->npiv_login.common.status; 3906 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 3907 unsigned int npiv_max_sectors; 3908 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3909 3910 switch (mad_status) { 3911 case IBMVFC_MAD_SUCCESS: 3912 ibmvfc_free_event(evt); 3913 break; 3914 case IBMVFC_MAD_FAILED: 3915 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3916 level += ibmvfc_retry_host_init(vhost); 3917 else 3918 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3919 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 3920 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3921 ibmvfc_free_event(evt); 3922 return; 3923 case IBMVFC_MAD_CRQ_ERROR: 3924 ibmvfc_retry_host_init(vhost); 3925 case IBMVFC_MAD_DRIVER_FAILED: 3926 ibmvfc_free_event(evt); 3927 return; 3928 default: 3929 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 3930 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3931 ibmvfc_free_event(evt); 3932 return; 3933 } 3934 3935 vhost->client_migrated = 0; 3936 3937 if (!(rsp->flags & IBMVFC_NATIVE_FC)) { 3938 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 3939 rsp->flags); 3940 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3941 wake_up(&vhost->work_wait_q); 3942 return; 3943 } 3944 3945 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { 3946 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 3947 rsp->max_cmds); 3948 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3949 wake_up(&vhost->work_wait_q); 3950 return; 3951 } 3952 3953 vhost->logged_in = 1; 3954 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); 3955 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 3956 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 3957 rsp->drc_name, npiv_max_sectors); 3958 3959 fc_host_fabric_name(vhost->host) = rsp->node_name; 3960 fc_host_node_name(vhost->host) = rsp->node_name; 3961 fc_host_port_name(vhost->host) = rsp->port_name; 3962 fc_host_port_id(vhost->host) = rsp->scsi_id; 3963 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 3964 fc_host_supported_classes(vhost->host) = 0; 3965 if (rsp->service_parms.class1_parms[0] & 0x80000000) 3966 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 3967 if (rsp->service_parms.class2_parms[0] & 0x80000000) 3968 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 3969 if (rsp->service_parms.class3_parms[0] & 0x80000000) 3970 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 3971 fc_host_maxframe_size(vhost->host) = 3972 rsp->service_parms.common.bb_rcv_sz & 0x0fff; 3973 3974 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; 3975 vhost->host->max_sectors = npiv_max_sectors; 3976 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 3977 wake_up(&vhost->work_wait_q); 3978} 3979 3980/** 3981 * ibmvfc_npiv_login - Sends NPIV login 3982 * @vhost: ibmvfc host struct 3983 * 3984 **/ 3985static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 3986{ 3987 struct ibmvfc_npiv_login_mad *mad; 3988 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3989 3990 ibmvfc_gather_partition_info(vhost); 3991 ibmvfc_set_login_info(vhost); 3992 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 3993 3994 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 3995 mad = &evt->iu.npiv_login; 3996 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 3997 mad->common.version = 1; 3998 mad->common.opcode = IBMVFC_NPIV_LOGIN; 3999 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); 4000 mad->buffer.va = vhost->login_buf_dma; 4001 mad->buffer.len = sizeof(*vhost->login_buf); 4002 4003 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4004 4005 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4006 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 4007 else 4008 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4009}; 4010 4011/** 4012 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 4013 * @vhost: ibmvfc host struct 4014 * 4015 **/ 4016static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 4017{ 4018 struct ibmvfc_host *vhost = evt->vhost; 4019 u32 mad_status = evt->xfer_iu->npiv_logout.common.status; 4020 4021 ibmvfc_free_event(evt); 4022 4023 switch (mad_status) { 4024 case IBMVFC_MAD_SUCCESS: 4025 if (list_empty(&vhost->sent) && 4026 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 4027 ibmvfc_init_host(vhost); 4028 return; 4029 } 4030 break; 4031 case IBMVFC_MAD_FAILED: 4032 case IBMVFC_MAD_NOT_SUPPORTED: 4033 case IBMVFC_MAD_CRQ_ERROR: 4034 case IBMVFC_MAD_DRIVER_FAILED: 4035 default: 4036 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 4037 break; 4038 } 4039 4040 ibmvfc_hard_reset_host(vhost); 4041} 4042 4043/** 4044 * ibmvfc_npiv_logout - Issue an NPIV Logout 4045 * @vhost: ibmvfc host struct 4046 * 4047 **/ 4048static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 4049{ 4050 struct ibmvfc_npiv_logout_mad *mad; 4051 struct ibmvfc_event *evt; 4052 4053 evt = ibmvfc_get_event(vhost); 4054 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 4055 4056 mad = &evt->iu.npiv_logout; 4057 memset(mad, 0, sizeof(*mad)); 4058 mad->common.version = 1; 4059 mad->common.opcode = IBMVFC_NPIV_LOGOUT; 4060 mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad); 4061 4062 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 4063 4064 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4065 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 4066 else 4067 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4068} 4069 4070/** 4071 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 4072 * @vhost: ibmvfc host struct 4073 * 4074 * Returns: 4075 * 1 if work to do / 0 if not 4076 **/ 4077static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 4078{ 4079 struct ibmvfc_target *tgt; 4080 4081 list_for_each_entry(tgt, &vhost->targets, queue) { 4082 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 4083 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4084 return 1; 4085 } 4086 4087 return 0; 4088} 4089 4090/** 4091 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 4092 * @vhost: ibmvfc host struct 4093 * 4094 * Returns: 4095 * 1 if work to do / 0 if not 4096 **/ 4097static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4098{ 4099 struct ibmvfc_target *tgt; 4100 4101 if (kthread_should_stop()) 4102 return 1; 4103 switch (vhost->action) { 4104 case IBMVFC_HOST_ACTION_NONE: 4105 case IBMVFC_HOST_ACTION_INIT_WAIT: 4106 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4107 return 0; 4108 case IBMVFC_HOST_ACTION_TGT_INIT: 4109 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4110 if (vhost->discovery_threads == disc_threads) 4111 return 0; 4112 list_for_each_entry(tgt, &vhost->targets, queue) 4113 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 4114 return 1; 4115 list_for_each_entry(tgt, &vhost->targets, queue) 4116 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4117 return 0; 4118 return 1; 4119 case IBMVFC_HOST_ACTION_LOGO: 4120 case IBMVFC_HOST_ACTION_INIT: 4121 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4122 case IBMVFC_HOST_ACTION_TGT_DEL: 4123 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4124 case IBMVFC_HOST_ACTION_QUERY: 4125 default: 4126 break; 4127 }; 4128 4129 return 1; 4130} 4131 4132/** 4133 * ibmvfc_work_to_do - Is there task level work to do? 4134 * @vhost: ibmvfc host struct 4135 * 4136 * Returns: 4137 * 1 if work to do / 0 if not 4138 **/ 4139static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4140{ 4141 unsigned long flags; 4142 int rc; 4143 4144 spin_lock_irqsave(vhost->host->host_lock, flags); 4145 rc = __ibmvfc_work_to_do(vhost); 4146 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4147 return rc; 4148} 4149 4150/** 4151 * ibmvfc_log_ae - Log async events if necessary 4152 * @vhost: ibmvfc host struct 4153 * @events: events to log 4154 * 4155 **/ 4156static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 4157{ 4158 if (events & IBMVFC_AE_RSCN) 4159 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 4160 if ((events & IBMVFC_AE_LINKDOWN) && 4161 vhost->state >= IBMVFC_HALTED) 4162 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 4163 if ((events & IBMVFC_AE_LINKUP) && 4164 vhost->state == IBMVFC_INITIALIZING) 4165 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 4166} 4167 4168/** 4169 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 4170 * @tgt: ibmvfc target struct 4171 * 4172 **/ 4173static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 4174{ 4175 struct ibmvfc_host *vhost = tgt->vhost; 4176 struct fc_rport *rport; 4177 unsigned long flags; 4178 4179 tgt_dbg(tgt, "Adding rport\n"); 4180 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 4181 spin_lock_irqsave(vhost->host->host_lock, flags); 4182 4183 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4184 tgt_dbg(tgt, "Deleting rport\n"); 4185 list_del(&tgt->queue); 4186 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4187 fc_remote_port_delete(rport); 4188 del_timer_sync(&tgt->timer); 4189 kref_put(&tgt->kref, ibmvfc_release_tgt); 4190 return; 4191 } 4192 4193 if (rport) { 4194 tgt_dbg(tgt, "rport add succeeded\n"); 4195 tgt->rport = rport; 4196 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; 4197 rport->supported_classes = 0; 4198 tgt->target_id = rport->scsi_target_id; 4199 if (tgt->service_parms.class1_parms[0] & 0x80000000) 4200 rport->supported_classes |= FC_COS_CLASS1; 4201 if (tgt->service_parms.class2_parms[0] & 0x80000000) 4202 rport->supported_classes |= FC_COS_CLASS2; 4203 if (tgt->service_parms.class3_parms[0] & 0x80000000) 4204 rport->supported_classes |= FC_COS_CLASS3; 4205 if (rport->rqst_q) 4206 blk_queue_max_segments(rport->rqst_q, 1); 4207 } else 4208 tgt_dbg(tgt, "rport add failed\n"); 4209 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4210} 4211 4212/** 4213 * ibmvfc_do_work - Do task level work 4214 * @vhost: ibmvfc host struct 4215 * 4216 **/ 4217static void ibmvfc_do_work(struct ibmvfc_host *vhost) 4218{ 4219 struct ibmvfc_target *tgt; 4220 unsigned long flags; 4221 struct fc_rport *rport; 4222 4223 ibmvfc_log_ae(vhost, vhost->events_to_log); 4224 spin_lock_irqsave(vhost->host->host_lock, flags); 4225 vhost->events_to_log = 0; 4226 switch (vhost->action) { 4227 case IBMVFC_HOST_ACTION_NONE: 4228 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4229 case IBMVFC_HOST_ACTION_INIT_WAIT: 4230 break; 4231 case IBMVFC_HOST_ACTION_LOGO: 4232 vhost->job_step(vhost); 4233 break; 4234 case IBMVFC_HOST_ACTION_INIT: 4235 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 4236 if (vhost->delay_init) { 4237 vhost->delay_init = 0; 4238 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4239 ssleep(15); 4240 return; 4241 } else 4242 vhost->job_step(vhost); 4243 break; 4244 case IBMVFC_HOST_ACTION_QUERY: 4245 list_for_each_entry(tgt, &vhost->targets, queue) 4246 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 4247 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 4248 break; 4249 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4250 list_for_each_entry(tgt, &vhost->targets, queue) { 4251 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4252 tgt->job_step(tgt); 4253 break; 4254 } 4255 } 4256 4257 if (!ibmvfc_dev_init_to_do(vhost)) 4258 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 4259 break; 4260 case IBMVFC_HOST_ACTION_TGT_DEL: 4261 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4262 list_for_each_entry(tgt, &vhost->targets, queue) { 4263 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4264 tgt_dbg(tgt, "Deleting rport\n"); 4265 rport = tgt->rport; 4266 tgt->rport = NULL; 4267 list_del(&tgt->queue); 4268 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4269 if (rport) 4270 fc_remote_port_delete(rport); 4271 del_timer_sync(&tgt->timer); 4272 kref_put(&tgt->kref, ibmvfc_release_tgt); 4273 return; 4274 } 4275 } 4276 4277 if (vhost->state == IBMVFC_INITIALIZING) { 4278 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 4279 if (vhost->reinit) { 4280 vhost->reinit = 0; 4281 scsi_block_requests(vhost->host); 4282 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4283 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4284 } else { 4285 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 4286 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4287 wake_up(&vhost->init_wait_q); 4288 schedule_work(&vhost->rport_add_work_q); 4289 vhost->init_retries = 0; 4290 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4291 scsi_unblock_requests(vhost->host); 4292 } 4293 4294 return; 4295 } else { 4296 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 4297 vhost->job_step = ibmvfc_discover_targets; 4298 } 4299 } else { 4300 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4301 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4302 scsi_unblock_requests(vhost->host); 4303 wake_up(&vhost->init_wait_q); 4304 return; 4305 } 4306 break; 4307 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4308 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4309 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4310 ibmvfc_alloc_targets(vhost); 4311 spin_lock_irqsave(vhost->host->host_lock, flags); 4312 break; 4313 case IBMVFC_HOST_ACTION_TGT_INIT: 4314 list_for_each_entry(tgt, &vhost->targets, queue) { 4315 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4316 tgt->job_step(tgt); 4317 break; 4318 } 4319 } 4320 4321 if (!ibmvfc_dev_init_to_do(vhost)) 4322 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4323 break; 4324 default: 4325 break; 4326 }; 4327 4328 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4329} 4330 4331/** 4332 * ibmvfc_work - Do task level work 4333 * @data: ibmvfc host struct 4334 * 4335 * Returns: 4336 * zero 4337 **/ 4338static int ibmvfc_work(void *data) 4339{ 4340 struct ibmvfc_host *vhost = data; 4341 int rc; 4342 4343 set_user_nice(current, -20); 4344 4345 while (1) { 4346 rc = wait_event_interruptible(vhost->work_wait_q, 4347 ibmvfc_work_to_do(vhost)); 4348 4349 BUG_ON(rc); 4350 4351 if (kthread_should_stop()) 4352 break; 4353 4354 ibmvfc_do_work(vhost); 4355 } 4356 4357 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4358 return 0; 4359} 4360 4361/** 4362 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4363 * @vhost: ibmvfc host struct 4364 * 4365 * Allocates a page for messages, maps it for dma, and registers 4366 * the crq with the hypervisor. 4367 * 4368 * Return value: 4369 * zero on success / other on failure 4370 **/ 4371static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4372{ 4373 int rc, retrc = -ENOMEM; 4374 struct device *dev = vhost->dev; 4375 struct vio_dev *vdev = to_vio_dev(dev); 4376 struct ibmvfc_crq_queue *crq = &vhost->crq; 4377 4378 ENTER; 4379 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4380 4381 if (!crq->msgs) 4382 return -ENOMEM; 4383 4384 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4385 crq->msg_token = dma_map_single(dev, crq->msgs, 4386 PAGE_SIZE, DMA_BIDIRECTIONAL); 4387 4388 if (dma_mapping_error(dev, crq->msg_token)) 4389 goto map_failed; 4390 4391 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4392 crq->msg_token, PAGE_SIZE); 4393 4394 if (rc == H_RESOURCE) 4395 /* maybe kexecing and resource is busy. try a reset */ 4396 retrc = rc = ibmvfc_reset_crq(vhost); 4397 4398 if (rc == H_CLOSED) 4399 dev_warn(dev, "Partner adapter not ready\n"); 4400 else if (rc) { 4401 dev_warn(dev, "Error %d opening adapter\n", rc); 4402 goto reg_crq_failed; 4403 } 4404 4405 retrc = 0; 4406 4407 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4408 4409 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4410 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4411 goto req_irq_failed; 4412 } 4413 4414 if ((rc = vio_enable_interrupts(vdev))) { 4415 dev_err(dev, "Error %d enabling interrupts\n", rc); 4416 goto req_irq_failed; 4417 } 4418 4419 crq->cur = 0; 4420 LEAVE; 4421 return retrc; 4422 4423req_irq_failed: 4424 tasklet_kill(&vhost->tasklet); 4425 do { 4426 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4427 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4428reg_crq_failed: 4429 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4430map_failed: 4431 free_page((unsigned long)crq->msgs); 4432 return retrc; 4433} 4434 4435/** 4436 * ibmvfc_free_mem - Free memory for vhost 4437 * @vhost: ibmvfc host struct 4438 * 4439 * Return value: 4440 * none 4441 **/ 4442static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4443{ 4444 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4445 4446 ENTER; 4447 mempool_destroy(vhost->tgt_pool); 4448 kfree(vhost->trace); 4449 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4450 vhost->disc_buf_dma); 4451 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4452 vhost->login_buf, vhost->login_buf_dma); 4453 dma_pool_destroy(vhost->sg_pool); 4454 dma_unmap_single(vhost->dev, async_q->msg_token, 4455 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4456 free_page((unsigned long)async_q->msgs); 4457 LEAVE; 4458} 4459 4460/** 4461 * ibmvfc_alloc_mem - Allocate memory for vhost 4462 * @vhost: ibmvfc host struct 4463 * 4464 * Return value: 4465 * 0 on success / non-zero on failure 4466 **/ 4467static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4468{ 4469 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4470 struct device *dev = vhost->dev; 4471 4472 ENTER; 4473 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4474 if (!async_q->msgs) { 4475 dev_err(dev, "Couldn't allocate async queue.\n"); 4476 goto nomem; 4477 } 4478 4479 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4480 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4481 async_q->size * sizeof(*async_q->msgs), 4482 DMA_BIDIRECTIONAL); 4483 4484 if (dma_mapping_error(dev, async_q->msg_token)) { 4485 dev_err(dev, "Failed to map async queue\n"); 4486 goto free_async_crq; 4487 } 4488 4489 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4490 SG_ALL * sizeof(struct srp_direct_buf), 4491 sizeof(struct srp_direct_buf), 0); 4492 4493 if (!vhost->sg_pool) { 4494 dev_err(dev, "Failed to allocate sg pool\n"); 4495 goto unmap_async_crq; 4496 } 4497 4498 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4499 &vhost->login_buf_dma, GFP_KERNEL); 4500 4501 if (!vhost->login_buf) { 4502 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4503 goto free_sg_pool; 4504 } 4505 4506 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4507 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4508 &vhost->disc_buf_dma, GFP_KERNEL); 4509 4510 if (!vhost->disc_buf) { 4511 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4512 goto free_login_buffer; 4513 } 4514 4515 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4516 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4517 4518 if (!vhost->trace) 4519 goto free_disc_buffer; 4520 4521 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4522 sizeof(struct ibmvfc_target)); 4523 4524 if (!vhost->tgt_pool) { 4525 dev_err(dev, "Couldn't allocate target memory pool\n"); 4526 goto free_trace; 4527 } 4528 4529 LEAVE; 4530 return 0; 4531 4532free_trace: 4533 kfree(vhost->trace); 4534free_disc_buffer: 4535 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4536 vhost->disc_buf_dma); 4537free_login_buffer: 4538 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4539 vhost->login_buf, vhost->login_buf_dma); 4540free_sg_pool: 4541 dma_pool_destroy(vhost->sg_pool); 4542unmap_async_crq: 4543 dma_unmap_single(dev, async_q->msg_token, 4544 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4545free_async_crq: 4546 free_page((unsigned long)async_q->msgs); 4547nomem: 4548 LEAVE; 4549 return -ENOMEM; 4550} 4551 4552/** 4553 * ibmvfc_rport_add_thread - Worker thread for rport adds 4554 * @work: work struct 4555 * 4556 **/ 4557static void ibmvfc_rport_add_thread(struct work_struct *work) 4558{ 4559 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4560 rport_add_work_q); 4561 struct ibmvfc_target *tgt; 4562 struct fc_rport *rport; 4563 unsigned long flags; 4564 int did_work; 4565 4566 ENTER; 4567 spin_lock_irqsave(vhost->host->host_lock, flags); 4568 do { 4569 did_work = 0; 4570 if (vhost->state != IBMVFC_ACTIVE) 4571 break; 4572 4573 list_for_each_entry(tgt, &vhost->targets, queue) { 4574 if (tgt->add_rport) { 4575 did_work = 1; 4576 tgt->add_rport = 0; 4577 kref_get(&tgt->kref); 4578 rport = tgt->rport; 4579 if (!rport) { 4580 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4581 ibmvfc_tgt_add_rport(tgt); 4582 } else if (get_device(&rport->dev)) { 4583 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4584 tgt_dbg(tgt, "Setting rport roles\n"); 4585 fc_remote_port_rolechg(rport, tgt->ids.roles); 4586 put_device(&rport->dev); 4587 } 4588 4589 kref_put(&tgt->kref, ibmvfc_release_tgt); 4590 spin_lock_irqsave(vhost->host->host_lock, flags); 4591 break; 4592 } 4593 } 4594 } while(did_work); 4595 4596 if (vhost->state == IBMVFC_ACTIVE) 4597 vhost->scan_complete = 1; 4598 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4599 LEAVE; 4600} 4601 4602/** 4603 * ibmvfc_probe - Adapter hot plug add entry point 4604 * @vdev: vio device struct 4605 * @id: vio device id struct 4606 * 4607 * Return value: 4608 * 0 on success / non-zero on failure 4609 **/ 4610static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4611{ 4612 struct ibmvfc_host *vhost; 4613 struct Scsi_Host *shost; 4614 struct device *dev = &vdev->dev; 4615 int rc = -ENOMEM; 4616 4617 ENTER; 4618 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4619 if (!shost) { 4620 dev_err(dev, "Couldn't allocate host data\n"); 4621 goto out; 4622 } 4623 4624 shost->transportt = ibmvfc_transport_template; 4625 shost->can_queue = max_requests; 4626 shost->max_lun = max_lun; 4627 shost->max_id = max_targets; 4628 shost->max_sectors = IBMVFC_MAX_SECTORS; 4629 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4630 shost->unique_id = shost->host_no; 4631 4632 vhost = shost_priv(shost); 4633 INIT_LIST_HEAD(&vhost->sent); 4634 INIT_LIST_HEAD(&vhost->free); 4635 INIT_LIST_HEAD(&vhost->targets); 4636 sprintf(vhost->name, IBMVFC_NAME); 4637 vhost->host = shost; 4638 vhost->dev = dev; 4639 vhost->partition_number = -1; 4640 vhost->log_level = log_level; 4641 vhost->task_set = 1; 4642 strcpy(vhost->partition_name, "UNKNOWN"); 4643 init_waitqueue_head(&vhost->work_wait_q); 4644 init_waitqueue_head(&vhost->init_wait_q); 4645 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4646 mutex_init(&vhost->passthru_mutex); 4647 4648 if ((rc = ibmvfc_alloc_mem(vhost))) 4649 goto free_scsi_host; 4650 4651 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4652 shost->host_no); 4653 4654 if (IS_ERR(vhost->work_thread)) { 4655 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4656 PTR_ERR(vhost->work_thread)); 4657 goto free_host_mem; 4658 } 4659 4660 if ((rc = ibmvfc_init_crq(vhost))) { 4661 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4662 goto kill_kthread; 4663 } 4664 4665 if ((rc = ibmvfc_init_event_pool(vhost))) { 4666 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4667 goto release_crq; 4668 } 4669 4670 if ((rc = scsi_add_host(shost, dev))) 4671 goto release_event_pool; 4672 4673 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4674 &ibmvfc_trace_attr))) { 4675 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4676 goto remove_shost; 4677 } 4678 4679 if (shost_to_fc_host(shost)->rqst_q) 4680 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 4681 dev_set_drvdata(dev, vhost); 4682 spin_lock(&ibmvfc_driver_lock); 4683 list_add_tail(&vhost->queue, &ibmvfc_head); 4684 spin_unlock(&ibmvfc_driver_lock); 4685 4686 ibmvfc_send_crq_init(vhost); 4687 scsi_scan_host(shost); 4688 return 0; 4689 4690remove_shost: 4691 scsi_remove_host(shost); 4692release_event_pool: 4693 ibmvfc_free_event_pool(vhost); 4694release_crq: 4695 ibmvfc_release_crq_queue(vhost); 4696kill_kthread: 4697 kthread_stop(vhost->work_thread); 4698free_host_mem: 4699 ibmvfc_free_mem(vhost); 4700free_scsi_host: 4701 scsi_host_put(shost); 4702out: 4703 LEAVE; 4704 return rc; 4705} 4706 4707/** 4708 * ibmvfc_remove - Adapter hot plug remove entry point 4709 * @vdev: vio device struct 4710 * 4711 * Return value: 4712 * 0 4713 **/ 4714static int ibmvfc_remove(struct vio_dev *vdev) 4715{ 4716 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4717 unsigned long flags; 4718 4719 ENTER; 4720 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4721 4722 spin_lock_irqsave(vhost->host->host_lock, flags); 4723 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4724 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4725 4726 ibmvfc_wait_while_resetting(vhost); 4727 ibmvfc_release_crq_queue(vhost); 4728 kthread_stop(vhost->work_thread); 4729 fc_remove_host(vhost->host); 4730 scsi_remove_host(vhost->host); 4731 4732 spin_lock_irqsave(vhost->host->host_lock, flags); 4733 ibmvfc_purge_requests(vhost, DID_ERROR); 4734 ibmvfc_free_event_pool(vhost); 4735 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4736 4737 ibmvfc_free_mem(vhost); 4738 spin_lock(&ibmvfc_driver_lock); 4739 list_del(&vhost->queue); 4740 spin_unlock(&ibmvfc_driver_lock); 4741 scsi_host_put(vhost->host); 4742 LEAVE; 4743 return 0; 4744} 4745 4746/** 4747 * ibmvfc_resume - Resume from suspend 4748 * @dev: device struct 4749 * 4750 * We may have lost an interrupt across suspend/resume, so kick the 4751 * interrupt handler 4752 * 4753 */ 4754static int ibmvfc_resume(struct device *dev) 4755{ 4756 unsigned long flags; 4757 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 4758 struct vio_dev *vdev = to_vio_dev(dev); 4759 4760 spin_lock_irqsave(vhost->host->host_lock, flags); 4761 vio_disable_interrupts(vdev); 4762 tasklet_schedule(&vhost->tasklet); 4763 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4764 return 0; 4765} 4766 4767/** 4768 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4769 * @vdev: vio device struct 4770 * 4771 * Return value: 4772 * Number of bytes the driver will need to DMA map at the same time in 4773 * order to perform well. 4774 */ 4775static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4776{ 4777 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4778 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4779} 4780 4781static struct vio_device_id ibmvfc_device_table[] __devinitdata = { 4782 {"fcp", "IBM,vfc-client"}, 4783 { "", "" } 4784}; 4785MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4786 4787static struct dev_pm_ops ibmvfc_pm_ops = { 4788 .resume = ibmvfc_resume 4789}; 4790 4791static struct vio_driver ibmvfc_driver = { 4792 .id_table = ibmvfc_device_table, 4793 .probe = ibmvfc_probe, 4794 .remove = ibmvfc_remove, 4795 .get_desired_dma = ibmvfc_get_desired_dma, 4796 .driver = { 4797 .name = IBMVFC_NAME, 4798 .owner = THIS_MODULE, 4799 .pm = &ibmvfc_pm_ops, 4800 } 4801}; 4802 4803static struct fc_function_template ibmvfc_transport_functions = { 4804 .show_host_fabric_name = 1, 4805 .show_host_node_name = 1, 4806 .show_host_port_name = 1, 4807 .show_host_supported_classes = 1, 4808 .show_host_port_type = 1, 4809 .show_host_port_id = 1, 4810 .show_host_maxframe_size = 1, 4811 4812 .get_host_port_state = ibmvfc_get_host_port_state, 4813 .show_host_port_state = 1, 4814 4815 .get_host_speed = ibmvfc_get_host_speed, 4816 .show_host_speed = 1, 4817 4818 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4819 .terminate_rport_io = ibmvfc_terminate_rport_io, 4820 4821 .show_rport_maxframe_size = 1, 4822 .show_rport_supported_classes = 1, 4823 4824 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4825 .show_rport_dev_loss_tmo = 1, 4826 4827 .get_starget_node_name = ibmvfc_get_starget_node_name, 4828 .show_starget_node_name = 1, 4829 4830 .get_starget_port_name = ibmvfc_get_starget_port_name, 4831 .show_starget_port_name = 1, 4832 4833 .get_starget_port_id = ibmvfc_get_starget_port_id, 4834 .show_starget_port_id = 1, 4835 4836 .bsg_request = ibmvfc_bsg_request, 4837 .bsg_timeout = ibmvfc_bsg_timeout, 4838}; 4839 4840/** 4841 * ibmvfc_module_init - Initialize the ibmvfc module 4842 * 4843 * Return value: 4844 * 0 on success / other on failure 4845 **/ 4846static int __init ibmvfc_module_init(void) 4847{ 4848 int rc; 4849 4850 if (!firmware_has_feature(FW_FEATURE_VIO)) 4851 return -ENODEV; 4852 4853 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4854 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4855 4856 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4857 if (!ibmvfc_transport_template) 4858 return -ENOMEM; 4859 4860 rc = vio_register_driver(&ibmvfc_driver); 4861 if (rc) 4862 fc_release_transport(ibmvfc_transport_template); 4863 return rc; 4864} 4865 4866/** 4867 * ibmvfc_module_exit - Teardown the ibmvfc module 4868 * 4869 * Return value: 4870 * nothing 4871 **/ 4872static void __exit ibmvfc_module_exit(void) 4873{ 4874 vio_unregister_driver(&ibmvfc_driver); 4875 fc_release_transport(ibmvfc_transport_template); 4876} 4877 4878module_init(ibmvfc_module_init); 4879module_exit(ibmvfc_module_exit); 4880