ibmvfc.c revision 752b32329b48e0b7481e82a5f891aa5bf01f3782
1/* 2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 3 * 4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 5 * 6 * Copyright (C) IBM Corporation, 2008 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24#include <linux/module.h> 25#include <linux/moduleparam.h> 26#include <linux/dma-mapping.h> 27#include <linux/dmapool.h> 28#include <linux/delay.h> 29#include <linux/interrupt.h> 30#include <linux/kthread.h> 31#include <linux/of.h> 32#include <linux/stringify.h> 33#include <asm/firmware.h> 34#include <asm/irq.h> 35#include <asm/vio.h> 36#include <scsi/scsi.h> 37#include <scsi/scsi_cmnd.h> 38#include <scsi/scsi_host.h> 39#include <scsi/scsi_device.h> 40#include <scsi/scsi_tcq.h> 41#include <scsi/scsi_transport_fc.h> 42#include "ibmvfc.h" 43 44static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 45static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 46static unsigned int max_lun = IBMVFC_MAX_LUN; 47static unsigned int max_targets = IBMVFC_MAX_TARGETS; 48static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 49static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 50static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO; 51static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 52static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 53static LIST_HEAD(ibmvfc_head); 54static DEFINE_SPINLOCK(ibmvfc_driver_lock); 55static struct scsi_transport_template *ibmvfc_transport_template; 56 57MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 58MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 59MODULE_LICENSE("GPL"); 60MODULE_VERSION(IBMVFC_DRIVER_VERSION); 61 62module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 63MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 64 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 65module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 66MODULE_PARM_DESC(default_timeout, 67 "Default timeout in seconds for initialization and EH commands. " 68 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 69module_param_named(max_requests, max_requests, uint, S_IRUGO); 70MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 71 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 72module_param_named(max_lun, max_lun, uint, S_IRUGO); 73MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 74 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 75module_param_named(max_targets, max_targets, uint, S_IRUGO); 76MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 77 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 78module_param_named(disc_threads, disc_threads, uint, S_IRUGO | S_IWUSR); 79MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 80 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 81module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 82MODULE_PARM_DESC(debug, "Enable driver debug information. " 83 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 84module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR); 85MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC " 86 "transport should insulate the loss of a remote port. Once this " 87 "value is exceeded, the scsi target is removed. " 88 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]"); 89module_param_named(log_level, log_level, uint, 0); 90MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 91 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 92 93static const struct { 94 u16 status; 95 u16 error; 96 u8 result; 97 u8 retry; 98 int log; 99 char *name; 100} cmd_status [] = { 101 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 102 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 103 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 104 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 105 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 106 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 107 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 108 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 109 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 110 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 111 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 112 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 0, 0, "link halted" }, 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 115 116 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 117 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 118 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 119 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 120 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 121 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 122 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 123 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 124 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 125 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 126 127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 128 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 129 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 131 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 132 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 133 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 134 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 135 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 136 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 137 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 138 139 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 140}; 141 142static void ibmvfc_npiv_login(struct ibmvfc_host *); 143static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 144static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 145static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 146 147static const char *unknown_error = "unknown error"; 148 149#ifdef CONFIG_SCSI_IBMVFC_TRACE 150/** 151 * ibmvfc_trc_start - Log a start trace entry 152 * @evt: ibmvfc event struct 153 * 154 **/ 155static void ibmvfc_trc_start(struct ibmvfc_event *evt) 156{ 157 struct ibmvfc_host *vhost = evt->vhost; 158 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 159 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 160 struct ibmvfc_trace_entry *entry; 161 162 entry = &vhost->trace[vhost->trace_index++]; 163 entry->evt = evt; 164 entry->time = jiffies; 165 entry->fmt = evt->crq.format; 166 entry->type = IBMVFC_TRC_START; 167 168 switch (entry->fmt) { 169 case IBMVFC_CMD_FORMAT: 170 entry->op_code = vfc_cmd->iu.cdb[0]; 171 entry->scsi_id = vfc_cmd->tgt_scsi_id; 172 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 173 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 174 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; 175 break; 176 case IBMVFC_MAD_FORMAT: 177 entry->op_code = mad->opcode; 178 break; 179 default: 180 break; 181 }; 182} 183 184/** 185 * ibmvfc_trc_end - Log an end trace entry 186 * @evt: ibmvfc event struct 187 * 188 **/ 189static void ibmvfc_trc_end(struct ibmvfc_event *evt) 190{ 191 struct ibmvfc_host *vhost = evt->vhost; 192 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 193 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 194 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; 195 196 entry->evt = evt; 197 entry->time = jiffies; 198 entry->fmt = evt->crq.format; 199 entry->type = IBMVFC_TRC_END; 200 201 switch (entry->fmt) { 202 case IBMVFC_CMD_FORMAT: 203 entry->op_code = vfc_cmd->iu.cdb[0]; 204 entry->scsi_id = vfc_cmd->tgt_scsi_id; 205 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 206 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 207 entry->u.end.status = vfc_cmd->status; 208 entry->u.end.error = vfc_cmd->error; 209 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; 210 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; 211 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; 212 break; 213 case IBMVFC_MAD_FORMAT: 214 entry->op_code = mad->opcode; 215 entry->u.end.status = mad->status; 216 break; 217 default: 218 break; 219 220 }; 221} 222 223#else 224#define ibmvfc_trc_start(evt) do { } while (0) 225#define ibmvfc_trc_end(evt) do { } while (0) 226#endif 227 228/** 229 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 230 * @status: status / error class 231 * @error: error 232 * 233 * Return value: 234 * index into cmd_status / -EINVAL on failure 235 **/ 236static int ibmvfc_get_err_index(u16 status, u16 error) 237{ 238 int i; 239 240 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 241 if ((cmd_status[i].status & status) == cmd_status[i].status && 242 cmd_status[i].error == error) 243 return i; 244 245 return -EINVAL; 246} 247 248/** 249 * ibmvfc_get_cmd_error - Find the error description for the fcp response 250 * @status: status / error class 251 * @error: error 252 * 253 * Return value: 254 * error description string 255 **/ 256static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 257{ 258 int rc = ibmvfc_get_err_index(status, error); 259 if (rc >= 0) 260 return cmd_status[rc].name; 261 return unknown_error; 262} 263 264/** 265 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 266 * @vfc_cmd: ibmvfc command struct 267 * 268 * Return value: 269 * SCSI result value to return for completed command 270 **/ 271static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) 272{ 273 int err; 274 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 275 int fc_rsp_len = rsp->fcp_rsp_len; 276 277 if ((rsp->flags & FCP_RSP_LEN_VALID) && 278 ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 279 rsp->data.info.rsp_code)) 280 return DID_ERROR << 16; 281 282 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 283 if (err >= 0) 284 return rsp->scsi_status | (cmd_status[err].result << 16); 285 return rsp->scsi_status | (DID_ERROR << 16); 286} 287 288/** 289 * ibmvfc_retry_cmd - Determine if error status is retryable 290 * @status: status / error class 291 * @error: error 292 * 293 * Return value: 294 * 1 if error should be retried / 0 if it should not 295 **/ 296static int ibmvfc_retry_cmd(u16 status, u16 error) 297{ 298 int rc = ibmvfc_get_err_index(status, error); 299 300 if (rc >= 0) 301 return cmd_status[rc].retry; 302 return 1; 303} 304 305static const char *unknown_fc_explain = "unknown fc explain"; 306 307static const struct { 308 u16 fc_explain; 309 char *name; 310} ls_explain [] = { 311 { 0x00, "no additional explanation" }, 312 { 0x01, "service parameter error - options" }, 313 { 0x03, "service parameter error - initiator control" }, 314 { 0x05, "service parameter error - recipient control" }, 315 { 0x07, "service parameter error - received data field size" }, 316 { 0x09, "service parameter error - concurrent seq" }, 317 { 0x0B, "service parameter error - credit" }, 318 { 0x0D, "invalid N_Port/F_Port_Name" }, 319 { 0x0E, "invalid node/Fabric Name" }, 320 { 0x0F, "invalid common service parameters" }, 321 { 0x11, "invalid association header" }, 322 { 0x13, "association header required" }, 323 { 0x15, "invalid originator S_ID" }, 324 { 0x17, "invalid OX_ID-RX-ID combination" }, 325 { 0x19, "command (request) already in progress" }, 326 { 0x1E, "N_Port Login requested" }, 327 { 0x1F, "Invalid N_Port_ID" }, 328}; 329 330static const struct { 331 u16 fc_explain; 332 char *name; 333} gs_explain [] = { 334 { 0x00, "no additional explanation" }, 335 { 0x01, "port identifier not registered" }, 336 { 0x02, "port name not registered" }, 337 { 0x03, "node name not registered" }, 338 { 0x04, "class of service not registered" }, 339 { 0x06, "initial process associator not registered" }, 340 { 0x07, "FC-4 TYPEs not registered" }, 341 { 0x08, "symbolic port name not registered" }, 342 { 0x09, "symbolic node name not registered" }, 343 { 0x0A, "port type not registered" }, 344 { 0xF0, "authorization exception" }, 345 { 0xF1, "authentication exception" }, 346 { 0xF2, "data base full" }, 347 { 0xF3, "data base empty" }, 348 { 0xF4, "processing request" }, 349 { 0xF5, "unable to verify connection" }, 350 { 0xF6, "devices not in a common zone" }, 351}; 352 353/** 354 * ibmvfc_get_ls_explain - Return the FC Explain description text 355 * @status: FC Explain status 356 * 357 * Returns: 358 * error string 359 **/ 360static const char *ibmvfc_get_ls_explain(u16 status) 361{ 362 int i; 363 364 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 365 if (ls_explain[i].fc_explain == status) 366 return ls_explain[i].name; 367 368 return unknown_fc_explain; 369} 370 371/** 372 * ibmvfc_get_gs_explain - Return the FC Explain description text 373 * @status: FC Explain status 374 * 375 * Returns: 376 * error string 377 **/ 378static const char *ibmvfc_get_gs_explain(u16 status) 379{ 380 int i; 381 382 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 383 if (gs_explain[i].fc_explain == status) 384 return gs_explain[i].name; 385 386 return unknown_fc_explain; 387} 388 389static const struct { 390 enum ibmvfc_fc_type fc_type; 391 char *name; 392} fc_type [] = { 393 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 394 { IBMVFC_PORT_REJECT, "port reject" }, 395 { IBMVFC_LS_REJECT, "ELS reject" }, 396 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 397 { IBMVFC_PORT_BUSY, "port busy" }, 398 { IBMVFC_BASIC_REJECT, "basic reject" }, 399}; 400 401static const char *unknown_fc_type = "unknown fc type"; 402 403/** 404 * ibmvfc_get_fc_type - Return the FC Type description text 405 * @status: FC Type error status 406 * 407 * Returns: 408 * error string 409 **/ 410static const char *ibmvfc_get_fc_type(u16 status) 411{ 412 int i; 413 414 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 415 if (fc_type[i].fc_type == status) 416 return fc_type[i].name; 417 418 return unknown_fc_type; 419} 420 421/** 422 * ibmvfc_set_tgt_action - Set the next init action for the target 423 * @tgt: ibmvfc target struct 424 * @action: action to perform 425 * 426 **/ 427static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 428 enum ibmvfc_target_action action) 429{ 430 switch (tgt->action) { 431 case IBMVFC_TGT_ACTION_DEL_RPORT: 432 break; 433 default: 434 tgt->action = action; 435 break; 436 } 437} 438 439/** 440 * ibmvfc_set_host_state - Set the state for the host 441 * @vhost: ibmvfc host struct 442 * @state: state to set host to 443 * 444 * Returns: 445 * 0 if state changed / non-zero if not changed 446 **/ 447static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 448 enum ibmvfc_host_state state) 449{ 450 int rc = 0; 451 452 switch (vhost->state) { 453 case IBMVFC_HOST_OFFLINE: 454 rc = -EINVAL; 455 break; 456 default: 457 vhost->state = state; 458 break; 459 }; 460 461 return rc; 462} 463 464/** 465 * ibmvfc_set_host_action - Set the next init action for the host 466 * @vhost: ibmvfc host struct 467 * @action: action to perform 468 * 469 **/ 470static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 471 enum ibmvfc_host_action action) 472{ 473 switch (action) { 474 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 475 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 476 vhost->action = action; 477 break; 478 case IBMVFC_HOST_ACTION_INIT_WAIT: 479 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 480 vhost->action = action; 481 break; 482 case IBMVFC_HOST_ACTION_QUERY: 483 switch (vhost->action) { 484 case IBMVFC_HOST_ACTION_INIT_WAIT: 485 case IBMVFC_HOST_ACTION_NONE: 486 case IBMVFC_HOST_ACTION_TGT_ADD: 487 vhost->action = action; 488 break; 489 default: 490 break; 491 }; 492 break; 493 case IBMVFC_HOST_ACTION_TGT_INIT: 494 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 495 vhost->action = action; 496 break; 497 case IBMVFC_HOST_ACTION_INIT: 498 case IBMVFC_HOST_ACTION_TGT_DEL: 499 case IBMVFC_HOST_ACTION_QUERY_TGTS: 500 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 501 case IBMVFC_HOST_ACTION_TGT_ADD: 502 case IBMVFC_HOST_ACTION_NONE: 503 default: 504 vhost->action = action; 505 break; 506 }; 507} 508 509/** 510 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 511 * @vhost: ibmvfc host struct 512 * 513 * Return value: 514 * nothing 515 **/ 516static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 517{ 518 if (vhost->action == IBMVFC_HOST_ACTION_NONE) { 519 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 520 scsi_block_requests(vhost->host); 521 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 522 } 523 } else 524 vhost->reinit = 1; 525 526 wake_up(&vhost->work_wait_q); 527} 528 529/** 530 * ibmvfc_link_down - Handle a link down event from the adapter 531 * @vhost: ibmvfc host struct 532 * @state: ibmvfc host state to enter 533 * 534 **/ 535static void ibmvfc_link_down(struct ibmvfc_host *vhost, 536 enum ibmvfc_host_state state) 537{ 538 struct ibmvfc_target *tgt; 539 540 ENTER; 541 scsi_block_requests(vhost->host); 542 list_for_each_entry(tgt, &vhost->targets, queue) 543 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 544 ibmvfc_set_host_state(vhost, state); 545 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 546 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 547 wake_up(&vhost->work_wait_q); 548 LEAVE; 549} 550 551/** 552 * ibmvfc_init_host - Start host initialization 553 * @vhost: ibmvfc host struct 554 * @relogin: is this a re-login? 555 * 556 * Return value: 557 * nothing 558 **/ 559static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin) 560{ 561 struct ibmvfc_target *tgt; 562 563 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 564 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 565 dev_err(vhost->dev, 566 "Host initialization retries exceeded. Taking adapter offline\n"); 567 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 568 return; 569 } 570 } 571 572 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 573 if (!relogin) { 574 memset(vhost->async_crq.msgs, 0, PAGE_SIZE); 575 vhost->async_crq.cur = 0; 576 } 577 578 list_for_each_entry(tgt, &vhost->targets, queue) 579 tgt->need_login = 1; 580 scsi_block_requests(vhost->host); 581 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 582 vhost->job_step = ibmvfc_npiv_login; 583 wake_up(&vhost->work_wait_q); 584 } 585} 586 587/** 588 * ibmvfc_send_crq - Send a CRQ 589 * @vhost: ibmvfc host struct 590 * @word1: the first 64 bits of the data 591 * @word2: the second 64 bits of the data 592 * 593 * Return value: 594 * 0 on success / other on failure 595 **/ 596static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 597{ 598 struct vio_dev *vdev = to_vio_dev(vhost->dev); 599 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 600} 601 602/** 603 * ibmvfc_send_crq_init - Send a CRQ init message 604 * @vhost: ibmvfc host struct 605 * 606 * Return value: 607 * 0 on success / other on failure 608 **/ 609static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 610{ 611 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 612 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 613} 614 615/** 616 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 617 * @vhost: ibmvfc host struct 618 * 619 * Return value: 620 * 0 on success / other on failure 621 **/ 622static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 623{ 624 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 625 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 626} 627 628/** 629 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 630 * @vhost: ibmvfc host struct 631 * 632 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 633 * the crq with the hypervisor. 634 **/ 635static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 636{ 637 long rc; 638 struct vio_dev *vdev = to_vio_dev(vhost->dev); 639 struct ibmvfc_crq_queue *crq = &vhost->crq; 640 641 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 642 free_irq(vdev->irq, vhost); 643 do { 644 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 645 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 646 647 vhost->state = IBMVFC_NO_CRQ; 648 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 649 free_page((unsigned long)crq->msgs); 650} 651 652/** 653 * ibmvfc_reenable_crq_queue - reenables the CRQ 654 * @vhost: ibmvfc host struct 655 * 656 * Return value: 657 * 0 on success / other on failure 658 **/ 659static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 660{ 661 int rc; 662 struct vio_dev *vdev = to_vio_dev(vhost->dev); 663 664 /* Re-enable the CRQ */ 665 do { 666 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 667 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 668 669 if (rc) 670 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 671 672 return rc; 673} 674 675/** 676 * ibmvfc_reset_crq - resets a crq after a failure 677 * @vhost: ibmvfc host struct 678 * 679 * Return value: 680 * 0 on success / other on failure 681 **/ 682static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 683{ 684 int rc; 685 struct vio_dev *vdev = to_vio_dev(vhost->dev); 686 struct ibmvfc_crq_queue *crq = &vhost->crq; 687 688 /* Close the CRQ */ 689 do { 690 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 691 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 692 693 vhost->state = IBMVFC_NO_CRQ; 694 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 695 696 /* Clean out the queue */ 697 memset(crq->msgs, 0, PAGE_SIZE); 698 crq->cur = 0; 699 700 /* And re-open it again */ 701 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 702 crq->msg_token, PAGE_SIZE); 703 704 if (rc == H_CLOSED) 705 /* Adapter is good, but other end is not ready */ 706 dev_warn(vhost->dev, "Partner adapter not ready\n"); 707 else if (rc != 0) 708 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 709 710 return rc; 711} 712 713/** 714 * ibmvfc_valid_event - Determines if event is valid. 715 * @pool: event_pool that contains the event 716 * @evt: ibmvfc event to be checked for validity 717 * 718 * Return value: 719 * 1 if event is valid / 0 if event is not valid 720 **/ 721static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 722 struct ibmvfc_event *evt) 723{ 724 int index = evt - pool->events; 725 if (index < 0 || index >= pool->size) /* outside of bounds */ 726 return 0; 727 if (evt != pool->events + index) /* unaligned */ 728 return 0; 729 return 1; 730} 731 732/** 733 * ibmvfc_free_event - Free the specified event 734 * @evt: ibmvfc_event to be freed 735 * 736 **/ 737static void ibmvfc_free_event(struct ibmvfc_event *evt) 738{ 739 struct ibmvfc_host *vhost = evt->vhost; 740 struct ibmvfc_event_pool *pool = &vhost->pool; 741 742 BUG_ON(!ibmvfc_valid_event(pool, evt)); 743 BUG_ON(atomic_inc_return(&evt->free) != 1); 744 list_add_tail(&evt->queue, &vhost->free); 745} 746 747/** 748 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 749 * @evt: ibmvfc event struct 750 * 751 * This function does not setup any error status, that must be done 752 * before this function gets called. 753 **/ 754static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 755{ 756 struct scsi_cmnd *cmnd = evt->cmnd; 757 758 if (cmnd) { 759 scsi_dma_unmap(cmnd); 760 cmnd->scsi_done(cmnd); 761 } 762 763 if (evt->eh_comp) 764 complete(evt->eh_comp); 765 766 ibmvfc_free_event(evt); 767} 768 769/** 770 * ibmvfc_fail_request - Fail request with specified error code 771 * @evt: ibmvfc event struct 772 * @error_code: error code to fail request with 773 * 774 * Return value: 775 * none 776 **/ 777static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 778{ 779 if (evt->cmnd) { 780 evt->cmnd->result = (error_code << 16); 781 evt->done = ibmvfc_scsi_eh_done; 782 } else 783 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; 784 785 list_del(&evt->queue); 786 del_timer(&evt->timer); 787 ibmvfc_trc_end(evt); 788 evt->done(evt); 789} 790 791/** 792 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 793 * @vhost: ibmvfc host struct 794 * @error_code: error code to fail requests with 795 * 796 * Return value: 797 * none 798 **/ 799static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 800{ 801 struct ibmvfc_event *evt, *pos; 802 803 ibmvfc_dbg(vhost, "Purging all requests\n"); 804 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 805 ibmvfc_fail_request(evt, error_code); 806} 807 808/** 809 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 810 * @vhost: struct ibmvfc host to reset 811 **/ 812static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 813{ 814 int rc; 815 816 scsi_block_requests(vhost->host); 817 ibmvfc_purge_requests(vhost, DID_ERROR); 818 if ((rc = ibmvfc_reset_crq(vhost)) || 819 (rc = ibmvfc_send_crq_init(vhost)) || 820 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 821 dev_err(vhost->dev, "Error after reset rc=%d\n", rc); 822 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 823 } else 824 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 825} 826 827/** 828 * ibmvfc_reset_host - Reset the connection to the server 829 * @vhost: struct ibmvfc host to reset 830 **/ 831static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 832{ 833 unsigned long flags; 834 835 spin_lock_irqsave(vhost->host->host_lock, flags); 836 __ibmvfc_reset_host(vhost); 837 spin_unlock_irqrestore(vhost->host->host_lock, flags); 838} 839 840/** 841 * ibmvfc_retry_host_init - Retry host initialization if allowed 842 * @vhost: ibmvfc host struct 843 * 844 **/ 845static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 846{ 847 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 848 vhost->delay_init = 1; 849 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 850 dev_err(vhost->dev, 851 "Host initialization retries exceeded. Taking adapter offline\n"); 852 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 853 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 854 __ibmvfc_reset_host(vhost); 855 else 856 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 857 } 858 859 wake_up(&vhost->work_wait_q); 860} 861 862/** 863 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 864 * @starget: scsi target struct 865 * 866 * Return value: 867 * ibmvfc_target struct / NULL if not found 868 **/ 869static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 870{ 871 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 872 struct ibmvfc_host *vhost = shost_priv(shost); 873 struct ibmvfc_target *tgt; 874 875 list_for_each_entry(tgt, &vhost->targets, queue) 876 if (tgt->target_id == starget->id) { 877 kref_get(&tgt->kref); 878 return tgt; 879 } 880 return NULL; 881} 882 883/** 884 * ibmvfc_get_target - Find the specified scsi_target 885 * @starget: scsi target struct 886 * 887 * Return value: 888 * ibmvfc_target struct / NULL if not found 889 **/ 890static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 891{ 892 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 893 struct ibmvfc_target *tgt; 894 unsigned long flags; 895 896 spin_lock_irqsave(shost->host_lock, flags); 897 tgt = __ibmvfc_get_target(starget); 898 spin_unlock_irqrestore(shost->host_lock, flags); 899 return tgt; 900} 901 902/** 903 * ibmvfc_get_host_speed - Get host port speed 904 * @shost: scsi host struct 905 * 906 * Return value: 907 * none 908 **/ 909static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 910{ 911 struct ibmvfc_host *vhost = shost_priv(shost); 912 unsigned long flags; 913 914 spin_lock_irqsave(shost->host_lock, flags); 915 if (vhost->state == IBMVFC_ACTIVE) { 916 switch (vhost->login_buf->resp.link_speed / 100) { 917 case 1: 918 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 919 break; 920 case 2: 921 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 922 break; 923 case 4: 924 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 925 break; 926 case 8: 927 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 928 break; 929 case 10: 930 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 931 break; 932 case 16: 933 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 934 break; 935 default: 936 ibmvfc_log(vhost, 3, "Unknown port speed: %ld Gbit\n", 937 vhost->login_buf->resp.link_speed / 100); 938 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 939 break; 940 } 941 } else 942 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 943 spin_unlock_irqrestore(shost->host_lock, flags); 944} 945 946/** 947 * ibmvfc_get_host_port_state - Get host port state 948 * @shost: scsi host struct 949 * 950 * Return value: 951 * none 952 **/ 953static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 954{ 955 struct ibmvfc_host *vhost = shost_priv(shost); 956 unsigned long flags; 957 958 spin_lock_irqsave(shost->host_lock, flags); 959 switch (vhost->state) { 960 case IBMVFC_INITIALIZING: 961 case IBMVFC_ACTIVE: 962 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 963 break; 964 case IBMVFC_LINK_DOWN: 965 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 966 break; 967 case IBMVFC_LINK_DEAD: 968 case IBMVFC_HOST_OFFLINE: 969 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 970 break; 971 case IBMVFC_HALTED: 972 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 973 break; 974 case IBMVFC_NO_CRQ: 975 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 976 break; 977 default: 978 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 979 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 980 break; 981 } 982 spin_unlock_irqrestore(shost->host_lock, flags); 983} 984 985/** 986 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 987 * @rport: rport struct 988 * @timeout: timeout value 989 * 990 * Return value: 991 * none 992 **/ 993static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 994{ 995 if (timeout) 996 rport->dev_loss_tmo = timeout; 997 else 998 rport->dev_loss_tmo = 1; 999} 1000 1001/** 1002 * ibmvfc_release_tgt - Free memory allocated for a target 1003 * @kref: kref struct 1004 * 1005 **/ 1006static void ibmvfc_release_tgt(struct kref *kref) 1007{ 1008 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1009 kfree(tgt); 1010} 1011 1012/** 1013 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1014 * @starget: scsi target struct 1015 * 1016 * Return value: 1017 * none 1018 **/ 1019static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1020{ 1021 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1022 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1023 if (tgt) 1024 kref_put(&tgt->kref, ibmvfc_release_tgt); 1025} 1026 1027/** 1028 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1029 * @starget: scsi target struct 1030 * 1031 * Return value: 1032 * none 1033 **/ 1034static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1035{ 1036 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1037 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1038 if (tgt) 1039 kref_put(&tgt->kref, ibmvfc_release_tgt); 1040} 1041 1042/** 1043 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1044 * @starget: scsi target struct 1045 * 1046 * Return value: 1047 * none 1048 **/ 1049static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1050{ 1051 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1052 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1053 if (tgt) 1054 kref_put(&tgt->kref, ibmvfc_release_tgt); 1055} 1056 1057/** 1058 * ibmvfc_wait_while_resetting - Wait while the host resets 1059 * @vhost: ibmvfc host struct 1060 * 1061 * Return value: 1062 * 0 on success / other on failure 1063 **/ 1064static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1065{ 1066 long timeout = wait_event_timeout(vhost->init_wait_q, 1067 ((vhost->state == IBMVFC_ACTIVE || 1068 vhost->state == IBMVFC_HOST_OFFLINE || 1069 vhost->state == IBMVFC_LINK_DEAD) && 1070 vhost->action == IBMVFC_HOST_ACTION_NONE), 1071 (init_timeout * HZ)); 1072 1073 return timeout ? 0 : -EIO; 1074} 1075 1076/** 1077 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1078 * @shost: scsi host struct 1079 * 1080 * Return value: 1081 * 0 on success / other on failure 1082 **/ 1083static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1084{ 1085 struct ibmvfc_host *vhost = shost_priv(shost); 1086 1087 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1088 ibmvfc_reset_host(vhost); 1089 return ibmvfc_wait_while_resetting(vhost); 1090} 1091 1092/** 1093 * ibmvfc_gather_partition_info - Gather info about the LPAR 1094 * 1095 * Return value: 1096 * none 1097 **/ 1098static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1099{ 1100 struct device_node *rootdn; 1101 const char *name; 1102 const unsigned int *num; 1103 1104 rootdn = of_find_node_by_path("/"); 1105 if (!rootdn) 1106 return; 1107 1108 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1109 if (name) 1110 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1111 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1112 if (num) 1113 vhost->partition_number = *num; 1114 of_node_put(rootdn); 1115} 1116 1117/** 1118 * ibmvfc_set_login_info - Setup info for NPIV login 1119 * @vhost: ibmvfc host struct 1120 * 1121 * Return value: 1122 * none 1123 **/ 1124static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1125{ 1126 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1127 struct device_node *of_node = vhost->dev->archdata.of_node; 1128 const char *location; 1129 1130 memset(login_info, 0, sizeof(*login_info)); 1131 1132 login_info->ostype = IBMVFC_OS_LINUX; 1133 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; 1134 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); 1135 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); 1136 login_info->partition_num = vhost->partition_number; 1137 login_info->vfc_frame_version = 1; 1138 login_info->fcp_version = 3; 1139 if (vhost->client_migrated) 1140 login_info->flags = IBMVFC_CLIENT_MIGRATED; 1141 1142 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1143 login_info->capabilities = IBMVFC_CAN_MIGRATE; 1144 login_info->async.va = vhost->async_crq.msg_token; 1145 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); 1146 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1147 strncpy(login_info->device_name, 1148 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1149 1150 location = of_get_property(of_node, "ibm,loc-code", NULL); 1151 location = location ? location : dev_name(vhost->dev); 1152 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1153} 1154 1155/** 1156 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1157 * @vhost: ibmvfc host who owns the event pool 1158 * 1159 * Returns zero on success. 1160 **/ 1161static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1162{ 1163 int i; 1164 struct ibmvfc_event_pool *pool = &vhost->pool; 1165 1166 ENTER; 1167 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1168 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1169 if (!pool->events) 1170 return -ENOMEM; 1171 1172 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1173 pool->size * sizeof(*pool->iu_storage), 1174 &pool->iu_token, 0); 1175 1176 if (!pool->iu_storage) { 1177 kfree(pool->events); 1178 return -ENOMEM; 1179 } 1180 1181 for (i = 0; i < pool->size; ++i) { 1182 struct ibmvfc_event *evt = &pool->events[i]; 1183 atomic_set(&evt->free, 1); 1184 evt->crq.valid = 0x80; 1185 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); 1186 evt->xfer_iu = pool->iu_storage + i; 1187 evt->vhost = vhost; 1188 evt->ext_list = NULL; 1189 list_add_tail(&evt->queue, &vhost->free); 1190 } 1191 1192 LEAVE; 1193 return 0; 1194} 1195 1196/** 1197 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1198 * @vhost: ibmvfc host who owns the event pool 1199 * 1200 **/ 1201static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1202{ 1203 int i; 1204 struct ibmvfc_event_pool *pool = &vhost->pool; 1205 1206 ENTER; 1207 for (i = 0; i < pool->size; ++i) { 1208 list_del(&pool->events[i].queue); 1209 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1210 if (pool->events[i].ext_list) 1211 dma_pool_free(vhost->sg_pool, 1212 pool->events[i].ext_list, 1213 pool->events[i].ext_list_token); 1214 } 1215 1216 kfree(pool->events); 1217 dma_free_coherent(vhost->dev, 1218 pool->size * sizeof(*pool->iu_storage), 1219 pool->iu_storage, pool->iu_token); 1220 LEAVE; 1221} 1222 1223/** 1224 * ibmvfc_get_event - Gets the next free event in pool 1225 * @vhost: ibmvfc host struct 1226 * 1227 * Returns a free event from the pool. 1228 **/ 1229static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1230{ 1231 struct ibmvfc_event *evt; 1232 1233 BUG_ON(list_empty(&vhost->free)); 1234 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1235 atomic_set(&evt->free, 0); 1236 list_del(&evt->queue); 1237 return evt; 1238} 1239 1240/** 1241 * ibmvfc_init_event - Initialize fields in an event struct that are always 1242 * required. 1243 * @evt: The event 1244 * @done: Routine to call when the event is responded to 1245 * @format: SRP or MAD format 1246 **/ 1247static void ibmvfc_init_event(struct ibmvfc_event *evt, 1248 void (*done) (struct ibmvfc_event *), u8 format) 1249{ 1250 evt->cmnd = NULL; 1251 evt->sync_iu = NULL; 1252 evt->crq.format = format; 1253 evt->done = done; 1254 evt->eh_comp = NULL; 1255} 1256 1257/** 1258 * ibmvfc_map_sg_list - Initialize scatterlist 1259 * @scmd: scsi command struct 1260 * @nseg: number of scatterlist segments 1261 * @md: memory descriptor list to initialize 1262 **/ 1263static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1264 struct srp_direct_buf *md) 1265{ 1266 int i; 1267 struct scatterlist *sg; 1268 1269 scsi_for_each_sg(scmd, sg, nseg, i) { 1270 md[i].va = sg_dma_address(sg); 1271 md[i].len = sg_dma_len(sg); 1272 md[i].key = 0; 1273 } 1274} 1275 1276/** 1277 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1278 * @scmd: Scsi_Cmnd with the scatterlist 1279 * @evt: ibmvfc event struct 1280 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1281 * @dev: device for which to map dma memory 1282 * 1283 * Returns: 1284 * 0 on success / non-zero on failure 1285 **/ 1286static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1287 struct ibmvfc_event *evt, 1288 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1289{ 1290 1291 int sg_mapped; 1292 struct srp_direct_buf *data = &vfc_cmd->ioba; 1293 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1294 1295 sg_mapped = scsi_dma_map(scmd); 1296 if (!sg_mapped) { 1297 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; 1298 return 0; 1299 } else if (unlikely(sg_mapped < 0)) { 1300 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1301 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1302 return sg_mapped; 1303 } 1304 1305 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1306 vfc_cmd->flags |= IBMVFC_WRITE; 1307 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1308 } else { 1309 vfc_cmd->flags |= IBMVFC_READ; 1310 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1311 } 1312 1313 if (sg_mapped == 1) { 1314 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1315 return 0; 1316 } 1317 1318 vfc_cmd->flags |= IBMVFC_SCATTERLIST; 1319 1320 if (!evt->ext_list) { 1321 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1322 &evt->ext_list_token); 1323 1324 if (!evt->ext_list) { 1325 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1326 return -ENOMEM; 1327 } 1328 } 1329 1330 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1331 1332 data->va = evt->ext_list_token; 1333 data->len = sg_mapped * sizeof(struct srp_direct_buf); 1334 data->key = 0; 1335 return 0; 1336} 1337 1338/** 1339 * ibmvfc_timeout - Internal command timeout handler 1340 * @evt: struct ibmvfc_event that timed out 1341 * 1342 * Called when an internally generated command times out 1343 **/ 1344static void ibmvfc_timeout(struct ibmvfc_event *evt) 1345{ 1346 struct ibmvfc_host *vhost = evt->vhost; 1347 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1348 ibmvfc_reset_host(vhost); 1349} 1350 1351/** 1352 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1353 * @evt: event to be sent 1354 * @vhost: ibmvfc host struct 1355 * @timeout: timeout in seconds - 0 means do not time command 1356 * 1357 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1358 **/ 1359static int ibmvfc_send_event(struct ibmvfc_event *evt, 1360 struct ibmvfc_host *vhost, unsigned long timeout) 1361{ 1362 u64 *crq_as_u64 = (u64 *) &evt->crq; 1363 int rc; 1364 1365 /* Copy the IU into the transfer area */ 1366 *evt->xfer_iu = evt->iu; 1367 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1368 evt->xfer_iu->cmd.tag = (u64)evt; 1369 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1370 evt->xfer_iu->mad_common.tag = (u64)evt; 1371 else 1372 BUG(); 1373 1374 list_add_tail(&evt->queue, &vhost->sent); 1375 init_timer(&evt->timer); 1376 1377 if (timeout) { 1378 evt->timer.data = (unsigned long) evt; 1379 evt->timer.expires = jiffies + (timeout * HZ); 1380 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; 1381 add_timer(&evt->timer); 1382 } 1383 1384 mb(); 1385 1386 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { 1387 list_del(&evt->queue); 1388 del_timer(&evt->timer); 1389 1390 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1391 * Firmware will send a CRQ with a transport event (0xFF) to 1392 * tell this client what has happened to the transport. This 1393 * will be handled in ibmvfc_handle_crq() 1394 */ 1395 if (rc == H_CLOSED) { 1396 if (printk_ratelimit()) 1397 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1398 if (evt->cmnd) 1399 scsi_dma_unmap(evt->cmnd); 1400 ibmvfc_free_event(evt); 1401 return SCSI_MLQUEUE_HOST_BUSY; 1402 } 1403 1404 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1405 if (evt->cmnd) { 1406 evt->cmnd->result = DID_ERROR << 16; 1407 evt->done = ibmvfc_scsi_eh_done; 1408 } else 1409 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; 1410 1411 evt->done(evt); 1412 } else 1413 ibmvfc_trc_start(evt); 1414 1415 return 0; 1416} 1417 1418/** 1419 * ibmvfc_log_error - Log an error for the failed command if appropriate 1420 * @evt: ibmvfc event to log 1421 * 1422 **/ 1423static void ibmvfc_log_error(struct ibmvfc_event *evt) 1424{ 1425 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1426 struct ibmvfc_host *vhost = evt->vhost; 1427 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1428 struct scsi_cmnd *cmnd = evt->cmnd; 1429 const char *err = unknown_error; 1430 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 1431 int logerr = 0; 1432 int rsp_code = 0; 1433 1434 if (index >= 0) { 1435 logerr = cmd_status[index].log; 1436 err = cmd_status[index].name; 1437 } 1438 1439 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1440 return; 1441 1442 if (rsp->flags & FCP_RSP_LEN_VALID) 1443 rsp_code = rsp->data.info.rsp_code; 1444 1445 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1446 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1447 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1448 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1449} 1450 1451/** 1452 * ibmvfc_scsi_done - Handle responses from commands 1453 * @evt: ibmvfc event to be handled 1454 * 1455 * Used as a callback when sending scsi cmds. 1456 **/ 1457static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1458{ 1459 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1460 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1461 struct scsi_cmnd *cmnd = evt->cmnd; 1462 u32 rsp_len = 0; 1463 u32 sense_len = rsp->fcp_sense_len; 1464 1465 if (cmnd) { 1466 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) 1467 scsi_set_resid(cmnd, vfc_cmd->adapter_resid); 1468 else if (rsp->flags & FCP_RESID_UNDER) 1469 scsi_set_resid(cmnd, rsp->fcp_resid); 1470 else 1471 scsi_set_resid(cmnd, 0); 1472 1473 if (vfc_cmd->status) { 1474 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1475 1476 if (rsp->flags & FCP_RSP_LEN_VALID) 1477 rsp_len = rsp->fcp_rsp_len; 1478 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1479 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1480 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1481 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1482 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED)) 1483 ibmvfc_reinit_host(evt->vhost); 1484 1485 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1486 cmnd->result = (DID_ERROR << 16); 1487 1488 ibmvfc_log_error(evt); 1489 } 1490 1491 if (!cmnd->result && 1492 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1493 cmnd->result = (DID_ERROR << 16); 1494 1495 scsi_dma_unmap(cmnd); 1496 cmnd->scsi_done(cmnd); 1497 } 1498 1499 if (evt->eh_comp) 1500 complete(evt->eh_comp); 1501 1502 ibmvfc_free_event(evt); 1503} 1504 1505/** 1506 * ibmvfc_host_chkready - Check if the host can accept commands 1507 * @vhost: struct ibmvfc host 1508 * 1509 * Returns: 1510 * 1 if host can accept command / 0 if not 1511 **/ 1512static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1513{ 1514 int result = 0; 1515 1516 switch (vhost->state) { 1517 case IBMVFC_LINK_DEAD: 1518 case IBMVFC_HOST_OFFLINE: 1519 result = DID_NO_CONNECT << 16; 1520 break; 1521 case IBMVFC_NO_CRQ: 1522 case IBMVFC_INITIALIZING: 1523 case IBMVFC_HALTED: 1524 case IBMVFC_LINK_DOWN: 1525 result = DID_REQUEUE << 16; 1526 break; 1527 case IBMVFC_ACTIVE: 1528 result = 0; 1529 break; 1530 }; 1531 1532 return result; 1533} 1534 1535/** 1536 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1537 * @cmnd: struct scsi_cmnd to be executed 1538 * @done: Callback function to be called when cmnd is completed 1539 * 1540 * Returns: 1541 * 0 on success / other on failure 1542 **/ 1543static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, 1544 void (*done) (struct scsi_cmnd *)) 1545{ 1546 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1547 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1548 struct ibmvfc_cmd *vfc_cmd; 1549 struct ibmvfc_event *evt; 1550 u8 tag[2]; 1551 int rc; 1552 1553 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1554 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1555 cmnd->result = rc; 1556 done(cmnd); 1557 return 0; 1558 } 1559 1560 cmnd->result = (DID_OK << 16); 1561 evt = ibmvfc_get_event(vhost); 1562 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1563 evt->cmnd = cmnd; 1564 cmnd->scsi_done = done; 1565 vfc_cmd = &evt->iu.cmd; 1566 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1567 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1568 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); 1569 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; 1570 vfc_cmd->payload_len = sizeof(vfc_cmd->iu); 1571 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); 1572 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; 1573 vfc_cmd->tgt_scsi_id = rport->port_id; 1574 if ((rport->supported_classes & FC_COS_CLASS3) && 1575 (fc_host_supported_classes(vhost->host) & FC_COS_CLASS3)) 1576 vfc_cmd->flags = IBMVFC_CLASS_3_ERR; 1577 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); 1578 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1579 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1580 1581 if (scsi_populate_tag_msg(cmnd, tag)) { 1582 vfc_cmd->task_tag = tag[1]; 1583 switch (tag[0]) { 1584 case MSG_SIMPLE_TAG: 1585 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1586 break; 1587 case MSG_HEAD_TAG: 1588 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; 1589 break; 1590 case MSG_ORDERED_TAG: 1591 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; 1592 break; 1593 }; 1594 } 1595 1596 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1597 return ibmvfc_send_event(evt, vhost, 0); 1598 1599 ibmvfc_free_event(evt); 1600 if (rc == -ENOMEM) 1601 return SCSI_MLQUEUE_HOST_BUSY; 1602 1603 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1604 scmd_printk(KERN_ERR, cmnd, 1605 "Failed to map DMA buffer for command. rc=%d\n", rc); 1606 1607 cmnd->result = DID_ERROR << 16; 1608 done(cmnd); 1609 return 0; 1610} 1611 1612/** 1613 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1614 * @evt: ibmvfc event struct 1615 * 1616 **/ 1617static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1618{ 1619 /* copy the response back */ 1620 if (evt->sync_iu) 1621 *evt->sync_iu = *evt->xfer_iu; 1622 1623 complete(&evt->comp); 1624} 1625 1626/** 1627 * ibmvfc_reset_device - Reset the device with the specified reset type 1628 * @sdev: scsi device to reset 1629 * @type: reset type 1630 * @desc: reset type description for log messages 1631 * 1632 * Returns: 1633 * 0 on success / other on failure 1634 **/ 1635static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1636{ 1637 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1638 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1639 struct ibmvfc_cmd *tmf; 1640 struct ibmvfc_event *evt = NULL; 1641 union ibmvfc_iu rsp_iu; 1642 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1643 int rsp_rc = -EBUSY; 1644 unsigned long flags; 1645 int rsp_code = 0; 1646 1647 spin_lock_irqsave(vhost->host->host_lock, flags); 1648 if (vhost->state == IBMVFC_ACTIVE) { 1649 evt = ibmvfc_get_event(vhost); 1650 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1651 1652 tmf = &evt->iu.cmd; 1653 memset(tmf, 0, sizeof(*tmf)); 1654 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1655 tmf->resp.len = sizeof(tmf->rsp); 1656 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1657 tmf->payload_len = sizeof(tmf->iu); 1658 tmf->resp_len = sizeof(tmf->rsp); 1659 tmf->cancel_key = (unsigned long)sdev->hostdata; 1660 tmf->tgt_scsi_id = rport->port_id; 1661 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1662 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1663 tmf->iu.tmf_flags = type; 1664 evt->sync_iu = &rsp_iu; 1665 1666 init_completion(&evt->comp); 1667 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1668 } 1669 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1670 1671 if (rsp_rc != 0) { 1672 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 1673 desc, rsp_rc); 1674 return -EIO; 1675 } 1676 1677 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 1678 wait_for_completion(&evt->comp); 1679 1680 if (rsp_iu.cmd.status) { 1681 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 1682 rsp_code = fc_rsp->data.info.rsp_code; 1683 1684 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 1685 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 1686 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 1687 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 1688 fc_rsp->scsi_status); 1689 rsp_rc = -EIO; 1690 } else 1691 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 1692 1693 spin_lock_irqsave(vhost->host->host_lock, flags); 1694 ibmvfc_free_event(evt); 1695 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1696 return rsp_rc; 1697} 1698 1699/** 1700 * ibmvfc_abort_task_set - Abort outstanding commands to the device 1701 * @sdev: scsi device to abort commands 1702 * 1703 * This sends an Abort Task Set to the VIOS for the specified device. This does 1704 * NOT send any cancel to the VIOS. That must be done separately. 1705 * 1706 * Returns: 1707 * 0 on success / other on failure 1708 **/ 1709static int ibmvfc_abort_task_set(struct scsi_device *sdev) 1710{ 1711 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1712 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1713 struct ibmvfc_cmd *tmf; 1714 struct ibmvfc_event *evt, *found_evt; 1715 union ibmvfc_iu rsp_iu; 1716 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1717 int rsp_rc = -EBUSY; 1718 unsigned long flags; 1719 int rsp_code = 0; 1720 1721 spin_lock_irqsave(vhost->host->host_lock, flags); 1722 found_evt = NULL; 1723 list_for_each_entry(evt, &vhost->sent, queue) { 1724 if (evt->cmnd && evt->cmnd->device == sdev) { 1725 found_evt = evt; 1726 break; 1727 } 1728 } 1729 1730 if (!found_evt) { 1731 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1732 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 1733 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1734 return 0; 1735 } 1736 1737 if (vhost->state == IBMVFC_ACTIVE) { 1738 evt = ibmvfc_get_event(vhost); 1739 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1740 1741 tmf = &evt->iu.cmd; 1742 memset(tmf, 0, sizeof(*tmf)); 1743 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1744 tmf->resp.len = sizeof(tmf->rsp); 1745 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1746 tmf->payload_len = sizeof(tmf->iu); 1747 tmf->resp_len = sizeof(tmf->rsp); 1748 tmf->cancel_key = (unsigned long)sdev->hostdata; 1749 tmf->tgt_scsi_id = rport->port_id; 1750 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1751 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1752 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 1753 evt->sync_iu = &rsp_iu; 1754 1755 init_completion(&evt->comp); 1756 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1757 } 1758 1759 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1760 1761 if (rsp_rc != 0) { 1762 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 1763 return -EIO; 1764 } 1765 1766 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 1767 wait_for_completion(&evt->comp); 1768 1769 if (rsp_iu.cmd.status) { 1770 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 1771 rsp_code = fc_rsp->data.info.rsp_code; 1772 1773 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 1774 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 1775 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 1776 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 1777 fc_rsp->scsi_status); 1778 rsp_rc = -EIO; 1779 } else 1780 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 1781 1782 spin_lock_irqsave(vhost->host->host_lock, flags); 1783 ibmvfc_free_event(evt); 1784 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1785 return rsp_rc; 1786} 1787 1788/** 1789 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 1790 * @sdev: scsi device to cancel commands 1791 * @type: type of error recovery being performed 1792 * 1793 * This sends a cancel to the VIOS for the specified device. This does 1794 * NOT send any abort to the actual device. That must be done separately. 1795 * 1796 * Returns: 1797 * 0 on success / other on failure 1798 **/ 1799static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 1800{ 1801 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1802 struct scsi_target *starget = scsi_target(sdev); 1803 struct fc_rport *rport = starget_to_rport(starget); 1804 struct ibmvfc_tmf *tmf; 1805 struct ibmvfc_event *evt, *found_evt; 1806 union ibmvfc_iu rsp; 1807 int rsp_rc = -EBUSY; 1808 unsigned long flags; 1809 u16 status; 1810 1811 ENTER; 1812 spin_lock_irqsave(vhost->host->host_lock, flags); 1813 found_evt = NULL; 1814 list_for_each_entry(evt, &vhost->sent, queue) { 1815 if (evt->cmnd && evt->cmnd->device == sdev) { 1816 found_evt = evt; 1817 break; 1818 } 1819 } 1820 1821 if (!found_evt) { 1822 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1823 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 1824 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1825 return 0; 1826 } 1827 1828 if (vhost->state == IBMVFC_ACTIVE) { 1829 evt = ibmvfc_get_event(vhost); 1830 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1831 1832 tmf = &evt->iu.tmf; 1833 memset(tmf, 0, sizeof(*tmf)); 1834 tmf->common.version = 1; 1835 tmf->common.opcode = IBMVFC_TMF_MAD; 1836 tmf->common.length = sizeof(*tmf); 1837 tmf->scsi_id = rport->port_id; 1838 int_to_scsilun(sdev->lun, &tmf->lun); 1839 tmf->flags = (type | IBMVFC_TMF_LUA_VALID); 1840 tmf->cancel_key = (unsigned long)sdev->hostdata; 1841 tmf->my_cancel_key = (unsigned long)starget->hostdata; 1842 1843 evt->sync_iu = &rsp; 1844 init_completion(&evt->comp); 1845 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1846 } 1847 1848 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1849 1850 if (rsp_rc != 0) { 1851 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 1852 return -EIO; 1853 } 1854 1855 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 1856 1857 wait_for_completion(&evt->comp); 1858 status = rsp.mad_common.status; 1859 spin_lock_irqsave(vhost->host->host_lock, flags); 1860 ibmvfc_free_event(evt); 1861 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1862 1863 if (status != IBMVFC_MAD_SUCCESS) { 1864 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 1865 return -EIO; 1866 } 1867 1868 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 1869 return 0; 1870} 1871 1872/** 1873 * ibmvfc_match_target - Match function for specified target 1874 * @evt: ibmvfc event struct 1875 * @device: device to match (starget) 1876 * 1877 * Returns: 1878 * 1 if event matches starget / 0 if event does not match starget 1879 **/ 1880static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 1881{ 1882 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 1883 return 1; 1884 return 0; 1885} 1886 1887/** 1888 * ibmvfc_match_lun - Match function for specified LUN 1889 * @evt: ibmvfc event struct 1890 * @device: device to match (sdev) 1891 * 1892 * Returns: 1893 * 1 if event matches sdev / 0 if event does not match sdev 1894 **/ 1895static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 1896{ 1897 if (evt->cmnd && evt->cmnd->device == device) 1898 return 1; 1899 return 0; 1900} 1901 1902/** 1903 * ibmvfc_wait_for_ops - Wait for ops to complete 1904 * @vhost: ibmvfc host struct 1905 * @device: device to match (starget or sdev) 1906 * @match: match function 1907 * 1908 * Returns: 1909 * SUCCESS / FAILED 1910 **/ 1911static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 1912 int (*match) (struct ibmvfc_event *, void *)) 1913{ 1914 struct ibmvfc_event *evt; 1915 DECLARE_COMPLETION_ONSTACK(comp); 1916 int wait; 1917 unsigned long flags; 1918 signed long timeout = init_timeout * HZ; 1919 1920 ENTER; 1921 do { 1922 wait = 0; 1923 spin_lock_irqsave(vhost->host->host_lock, flags); 1924 list_for_each_entry(evt, &vhost->sent, queue) { 1925 if (match(evt, device)) { 1926 evt->eh_comp = ∁ 1927 wait++; 1928 } 1929 } 1930 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1931 1932 if (wait) { 1933 timeout = wait_for_completion_timeout(&comp, timeout); 1934 1935 if (!timeout) { 1936 wait = 0; 1937 spin_lock_irqsave(vhost->host->host_lock, flags); 1938 list_for_each_entry(evt, &vhost->sent, queue) { 1939 if (match(evt, device)) { 1940 evt->eh_comp = NULL; 1941 wait++; 1942 } 1943 } 1944 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1945 if (wait) 1946 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 1947 LEAVE; 1948 return wait ? FAILED : SUCCESS; 1949 } 1950 } 1951 } while (wait); 1952 1953 LEAVE; 1954 return SUCCESS; 1955} 1956 1957/** 1958 * ibmvfc_eh_abort_handler - Abort a command 1959 * @cmd: scsi command to abort 1960 * 1961 * Returns: 1962 * SUCCESS / FAILED 1963 **/ 1964static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 1965{ 1966 struct scsi_device *sdev = cmd->device; 1967 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1968 int cancel_rc, abort_rc; 1969 int rc = FAILED; 1970 1971 ENTER; 1972 ibmvfc_wait_while_resetting(vhost); 1973 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 1974 abort_rc = ibmvfc_abort_task_set(sdev); 1975 1976 if (!cancel_rc && !abort_rc) 1977 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 1978 1979 LEAVE; 1980 return rc; 1981} 1982 1983/** 1984 * ibmvfc_eh_device_reset_handler - Reset a single LUN 1985 * @cmd: scsi command struct 1986 * 1987 * Returns: 1988 * SUCCESS / FAILED 1989 **/ 1990static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 1991{ 1992 struct scsi_device *sdev = cmd->device; 1993 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1994 int cancel_rc, reset_rc; 1995 int rc = FAILED; 1996 1997 ENTER; 1998 ibmvfc_wait_while_resetting(vhost); 1999 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2000 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2001 2002 if (!cancel_rc && !reset_rc) 2003 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2004 2005 LEAVE; 2006 return rc; 2007} 2008 2009/** 2010 * ibmvfc_dev_cancel_all - Device iterated cancel all function 2011 * @sdev: scsi device struct 2012 * @data: return code 2013 * 2014 **/ 2015static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data) 2016{ 2017 unsigned long *rc = data; 2018 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2019} 2020 2021/** 2022 * ibmvfc_dev_abort_all - Device iterated abort task set function 2023 * @sdev: scsi device struct 2024 * @data: return code 2025 * 2026 **/ 2027static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) 2028{ 2029 unsigned long *rc = data; 2030 *rc |= ibmvfc_abort_task_set(sdev); 2031} 2032 2033/** 2034 * ibmvfc_eh_target_reset_handler - Reset the target 2035 * @cmd: scsi command struct 2036 * 2037 * Returns: 2038 * SUCCESS / FAILED 2039 **/ 2040static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2041{ 2042 struct scsi_device *sdev = cmd->device; 2043 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2044 struct scsi_target *starget = scsi_target(sdev); 2045 int reset_rc; 2046 int rc = FAILED; 2047 unsigned long cancel_rc = 0; 2048 2049 ENTER; 2050 ibmvfc_wait_while_resetting(vhost); 2051 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); 2052 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2053 2054 if (!cancel_rc && !reset_rc) 2055 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2056 2057 LEAVE; 2058 return rc; 2059} 2060 2061/** 2062 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2063 * @cmd: struct scsi_cmnd having problems 2064 * 2065 **/ 2066static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2067{ 2068 int rc; 2069 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2070 2071 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2072 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2073 return rc ? FAILED : SUCCESS; 2074} 2075 2076/** 2077 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2078 * @rport: rport struct 2079 * 2080 * Return value: 2081 * none 2082 **/ 2083static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2084{ 2085 struct scsi_target *starget = to_scsi_target(&rport->dev); 2086 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2087 struct ibmvfc_host *vhost = shost_priv(shost); 2088 unsigned long cancel_rc = 0; 2089 unsigned long abort_rc = 0; 2090 int rc = FAILED; 2091 2092 ENTER; 2093 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); 2094 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); 2095 2096 if (!cancel_rc && !abort_rc) 2097 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2098 2099 if (rc == FAILED) 2100 ibmvfc_issue_fc_host_lip(shost); 2101 LEAVE; 2102} 2103 2104static const struct { 2105 enum ibmvfc_async_event ae; 2106 const char *desc; 2107} ae_desc [] = { 2108 { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, 2109 { IBMVFC_AE_ELS_LOGO, "LOGO" }, 2110 { IBMVFC_AE_ELS_PRLO, "PRLO" }, 2111 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, 2112 { IBMVFC_AE_SCN_GROUP, "Group SCN" }, 2113 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, 2114 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, 2115 { IBMVFC_AE_LINK_UP, "Link Up" }, 2116 { IBMVFC_AE_LINK_DOWN, "Link Down" }, 2117 { IBMVFC_AE_LINK_DEAD, "Link Dead" }, 2118 { IBMVFC_AE_HALT, "Halt" }, 2119 { IBMVFC_AE_RESUME, "Resume" }, 2120 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, 2121}; 2122 2123static const char *unknown_ae = "Unknown async"; 2124 2125/** 2126 * ibmvfc_get_ae_desc - Get text description for async event 2127 * @ae: async event 2128 * 2129 **/ 2130static const char *ibmvfc_get_ae_desc(u64 ae) 2131{ 2132 int i; 2133 2134 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2135 if (ae_desc[i].ae == ae) 2136 return ae_desc[i].desc; 2137 2138 return unknown_ae; 2139} 2140 2141/** 2142 * ibmvfc_handle_async - Handle an async event from the adapter 2143 * @crq: crq to process 2144 * @vhost: ibmvfc host struct 2145 * 2146 **/ 2147static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2148 struct ibmvfc_host *vhost) 2149{ 2150 const char *desc = ibmvfc_get_ae_desc(crq->event); 2151 2152 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %lx, wwpn: %lx," 2153 " node_name: %lx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name); 2154 2155 switch (crq->event) { 2156 case IBMVFC_AE_LINK_UP: 2157 case IBMVFC_AE_RESUME: 2158 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2159 vhost->delay_init = 1; 2160 __ibmvfc_reset_host(vhost); 2161 break; 2162 case IBMVFC_AE_SCN_FABRIC: 2163 case IBMVFC_AE_SCN_DOMAIN: 2164 vhost->events_to_log |= IBMVFC_AE_RSCN; 2165 vhost->delay_init = 1; 2166 __ibmvfc_reset_host(vhost); 2167 break; 2168 case IBMVFC_AE_SCN_NPORT: 2169 case IBMVFC_AE_SCN_GROUP: 2170 vhost->events_to_log |= IBMVFC_AE_RSCN; 2171 case IBMVFC_AE_ELS_LOGO: 2172 case IBMVFC_AE_ELS_PRLO: 2173 case IBMVFC_AE_ELS_PLOGI: 2174 ibmvfc_reinit_host(vhost); 2175 break; 2176 case IBMVFC_AE_LINK_DOWN: 2177 case IBMVFC_AE_ADAPTER_FAILED: 2178 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2179 break; 2180 case IBMVFC_AE_LINK_DEAD: 2181 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2182 break; 2183 case IBMVFC_AE_HALT: 2184 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2185 break; 2186 default: 2187 dev_err(vhost->dev, "Unknown async event received: %ld\n", crq->event); 2188 break; 2189 }; 2190} 2191 2192/** 2193 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2194 * @crq: Command/Response queue 2195 * @vhost: ibmvfc host struct 2196 * 2197 **/ 2198static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2199{ 2200 long rc; 2201 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; 2202 2203 switch (crq->valid) { 2204 case IBMVFC_CRQ_INIT_RSP: 2205 switch (crq->format) { 2206 case IBMVFC_CRQ_INIT: 2207 dev_info(vhost->dev, "Partner initialized\n"); 2208 /* Send back a response */ 2209 rc = ibmvfc_send_crq_init_complete(vhost); 2210 if (rc == 0) 2211 ibmvfc_init_host(vhost, 0); 2212 else 2213 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2214 break; 2215 case IBMVFC_CRQ_INIT_COMPLETE: 2216 dev_info(vhost->dev, "Partner initialization complete\n"); 2217 ibmvfc_init_host(vhost, 0); 2218 break; 2219 default: 2220 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2221 } 2222 return; 2223 case IBMVFC_CRQ_XPORT_EVENT: 2224 vhost->state = IBMVFC_NO_CRQ; 2225 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2226 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2227 /* We need to re-setup the interpartition connection */ 2228 dev_info(vhost->dev, "Re-enabling adapter\n"); 2229 vhost->client_migrated = 1; 2230 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2231 if ((rc = ibmvfc_reenable_crq_queue(vhost)) || 2232 (rc = ibmvfc_send_crq_init(vhost))) { 2233 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2234 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); 2235 } else 2236 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2237 } else { 2238 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2239 2240 ibmvfc_purge_requests(vhost, DID_ERROR); 2241 if ((rc = ibmvfc_reset_crq(vhost)) || 2242 (rc = ibmvfc_send_crq_init(vhost))) { 2243 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2244 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); 2245 } else 2246 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2247 } 2248 return; 2249 case IBMVFC_CRQ_CMD_RSP: 2250 break; 2251 default: 2252 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2253 return; 2254 } 2255 2256 if (crq->format == IBMVFC_ASYNC_EVENT) 2257 return; 2258 2259 /* The only kind of payload CRQs we should get are responses to 2260 * things we send. Make sure this response is to something we 2261 * actually sent 2262 */ 2263 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2264 dev_err(vhost->dev, "Returned correlation_token 0x%08lx is invalid!\n", 2265 crq->ioba); 2266 return; 2267 } 2268 2269 if (unlikely(atomic_read(&evt->free))) { 2270 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08lx!\n", 2271 crq->ioba); 2272 return; 2273 } 2274 2275 del_timer(&evt->timer); 2276 list_del(&evt->queue); 2277 ibmvfc_trc_end(evt); 2278 evt->done(evt); 2279} 2280 2281/** 2282 * ibmvfc_scan_finished - Check if the device scan is done. 2283 * @shost: scsi host struct 2284 * @time: current elapsed time 2285 * 2286 * Returns: 2287 * 0 if scan is not done / 1 if scan is done 2288 **/ 2289static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2290{ 2291 unsigned long flags; 2292 struct ibmvfc_host *vhost = shost_priv(shost); 2293 int done = 0; 2294 2295 spin_lock_irqsave(shost->host_lock, flags); 2296 if (time >= (init_timeout * HZ)) { 2297 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2298 "continuing initialization\n", init_timeout); 2299 done = 1; 2300 } 2301 2302 if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE) 2303 done = 1; 2304 spin_unlock_irqrestore(shost->host_lock, flags); 2305 return done; 2306} 2307 2308/** 2309 * ibmvfc_slave_alloc - Setup the device's task set value 2310 * @sdev: struct scsi_device device to configure 2311 * 2312 * Set the device's task set value so that error handling works as 2313 * expected. 2314 * 2315 * Returns: 2316 * 0 on success / -ENXIO if device does not exist 2317 **/ 2318static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2319{ 2320 struct Scsi_Host *shost = sdev->host; 2321 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2322 struct ibmvfc_host *vhost = shost_priv(shost); 2323 unsigned long flags = 0; 2324 2325 if (!rport || fc_remote_port_chkready(rport)) 2326 return -ENXIO; 2327 2328 spin_lock_irqsave(shost->host_lock, flags); 2329 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2330 spin_unlock_irqrestore(shost->host_lock, flags); 2331 return 0; 2332} 2333 2334/** 2335 * ibmvfc_target_alloc - Setup the target's task set value 2336 * @starget: struct scsi_target 2337 * 2338 * Set the target's task set value so that error handling works as 2339 * expected. 2340 * 2341 * Returns: 2342 * 0 on success / -ENXIO if device does not exist 2343 **/ 2344static int ibmvfc_target_alloc(struct scsi_target *starget) 2345{ 2346 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2347 struct ibmvfc_host *vhost = shost_priv(shost); 2348 unsigned long flags = 0; 2349 2350 spin_lock_irqsave(shost->host_lock, flags); 2351 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2352 spin_unlock_irqrestore(shost->host_lock, flags); 2353 return 0; 2354} 2355 2356/** 2357 * ibmvfc_slave_configure - Configure the device 2358 * @sdev: struct scsi_device device to configure 2359 * 2360 * Enable allow_restart for a device if it is a disk. Adjust the 2361 * queue_depth here also. 2362 * 2363 * Returns: 2364 * 0 2365 **/ 2366static int ibmvfc_slave_configure(struct scsi_device *sdev) 2367{ 2368 struct Scsi_Host *shost = sdev->host; 2369 struct fc_rport *rport = starget_to_rport(sdev->sdev_target); 2370 unsigned long flags = 0; 2371 2372 spin_lock_irqsave(shost->host_lock, flags); 2373 if (sdev->type == TYPE_DISK) 2374 sdev->allow_restart = 1; 2375 2376 if (sdev->tagged_supported) { 2377 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 2378 scsi_activate_tcq(sdev, sdev->queue_depth); 2379 } else 2380 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2381 2382 rport->dev_loss_tmo = dev_loss_tmo; 2383 spin_unlock_irqrestore(shost->host_lock, flags); 2384 return 0; 2385} 2386 2387/** 2388 * ibmvfc_change_queue_depth - Change the device's queue depth 2389 * @sdev: scsi device struct 2390 * @qdepth: depth to set 2391 * 2392 * Return value: 2393 * actual depth set 2394 **/ 2395static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 2396{ 2397 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2398 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2399 2400 scsi_adjust_queue_depth(sdev, 0, qdepth); 2401 return sdev->queue_depth; 2402} 2403 2404/** 2405 * ibmvfc_change_queue_type - Change the device's queue type 2406 * @sdev: scsi device struct 2407 * @tag_type: type of tags to use 2408 * 2409 * Return value: 2410 * actual queue type set 2411 **/ 2412static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) 2413{ 2414 if (sdev->tagged_supported) { 2415 scsi_set_tag_type(sdev, tag_type); 2416 2417 if (tag_type) 2418 scsi_activate_tcq(sdev, sdev->queue_depth); 2419 else 2420 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2421 } else 2422 tag_type = 0; 2423 2424 return tag_type; 2425} 2426 2427static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2428 struct device_attribute *attr, char *buf) 2429{ 2430 struct Scsi_Host *shost = class_to_shost(dev); 2431 struct ibmvfc_host *vhost = shost_priv(shost); 2432 2433 return snprintf(buf, PAGE_SIZE, "%s\n", 2434 vhost->login_buf->resp.partition_name); 2435} 2436 2437static struct device_attribute ibmvfc_host_partition_name = { 2438 .attr = { 2439 .name = "partition_name", 2440 .mode = S_IRUGO, 2441 }, 2442 .show = ibmvfc_show_host_partition_name, 2443}; 2444 2445static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2446 struct device_attribute *attr, char *buf) 2447{ 2448 struct Scsi_Host *shost = class_to_shost(dev); 2449 struct ibmvfc_host *vhost = shost_priv(shost); 2450 2451 return snprintf(buf, PAGE_SIZE, "%s\n", 2452 vhost->login_buf->resp.device_name); 2453} 2454 2455static struct device_attribute ibmvfc_host_device_name = { 2456 .attr = { 2457 .name = "device_name", 2458 .mode = S_IRUGO, 2459 }, 2460 .show = ibmvfc_show_host_device_name, 2461}; 2462 2463static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2464 struct device_attribute *attr, char *buf) 2465{ 2466 struct Scsi_Host *shost = class_to_shost(dev); 2467 struct ibmvfc_host *vhost = shost_priv(shost); 2468 2469 return snprintf(buf, PAGE_SIZE, "%s\n", 2470 vhost->login_buf->resp.port_loc_code); 2471} 2472 2473static struct device_attribute ibmvfc_host_loc_code = { 2474 .attr = { 2475 .name = "port_loc_code", 2476 .mode = S_IRUGO, 2477 }, 2478 .show = ibmvfc_show_host_loc_code, 2479}; 2480 2481static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2482 struct device_attribute *attr, char *buf) 2483{ 2484 struct Scsi_Host *shost = class_to_shost(dev); 2485 struct ibmvfc_host *vhost = shost_priv(shost); 2486 2487 return snprintf(buf, PAGE_SIZE, "%s\n", 2488 vhost->login_buf->resp.drc_name); 2489} 2490 2491static struct device_attribute ibmvfc_host_drc_name = { 2492 .attr = { 2493 .name = "drc_name", 2494 .mode = S_IRUGO, 2495 }, 2496 .show = ibmvfc_show_host_drc_name, 2497}; 2498 2499static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2500 struct device_attribute *attr, char *buf) 2501{ 2502 struct Scsi_Host *shost = class_to_shost(dev); 2503 struct ibmvfc_host *vhost = shost_priv(shost); 2504 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2505} 2506 2507static struct device_attribute ibmvfc_host_npiv_version = { 2508 .attr = { 2509 .name = "npiv_version", 2510 .mode = S_IRUGO, 2511 }, 2512 .show = ibmvfc_show_host_npiv_version, 2513}; 2514 2515/** 2516 * ibmvfc_show_log_level - Show the adapter's error logging level 2517 * @dev: class device struct 2518 * @buf: buffer 2519 * 2520 * Return value: 2521 * number of bytes printed to buffer 2522 **/ 2523static ssize_t ibmvfc_show_log_level(struct device *dev, 2524 struct device_attribute *attr, char *buf) 2525{ 2526 struct Scsi_Host *shost = class_to_shost(dev); 2527 struct ibmvfc_host *vhost = shost_priv(shost); 2528 unsigned long flags = 0; 2529 int len; 2530 2531 spin_lock_irqsave(shost->host_lock, flags); 2532 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2533 spin_unlock_irqrestore(shost->host_lock, flags); 2534 return len; 2535} 2536 2537/** 2538 * ibmvfc_store_log_level - Change the adapter's error logging level 2539 * @dev: class device struct 2540 * @buf: buffer 2541 * 2542 * Return value: 2543 * number of bytes printed to buffer 2544 **/ 2545static ssize_t ibmvfc_store_log_level(struct device *dev, 2546 struct device_attribute *attr, 2547 const char *buf, size_t count) 2548{ 2549 struct Scsi_Host *shost = class_to_shost(dev); 2550 struct ibmvfc_host *vhost = shost_priv(shost); 2551 unsigned long flags = 0; 2552 2553 spin_lock_irqsave(shost->host_lock, flags); 2554 vhost->log_level = simple_strtoul(buf, NULL, 10); 2555 spin_unlock_irqrestore(shost->host_lock, flags); 2556 return strlen(buf); 2557} 2558 2559static struct device_attribute ibmvfc_log_level_attr = { 2560 .attr = { 2561 .name = "log_level", 2562 .mode = S_IRUGO | S_IWUSR, 2563 }, 2564 .show = ibmvfc_show_log_level, 2565 .store = ibmvfc_store_log_level 2566}; 2567 2568#ifdef CONFIG_SCSI_IBMVFC_TRACE 2569/** 2570 * ibmvfc_read_trace - Dump the adapter trace 2571 * @kobj: kobject struct 2572 * @bin_attr: bin_attribute struct 2573 * @buf: buffer 2574 * @off: offset 2575 * @count: buffer size 2576 * 2577 * Return value: 2578 * number of bytes printed to buffer 2579 **/ 2580static ssize_t ibmvfc_read_trace(struct kobject *kobj, 2581 struct bin_attribute *bin_attr, 2582 char *buf, loff_t off, size_t count) 2583{ 2584 struct device *dev = container_of(kobj, struct device, kobj); 2585 struct Scsi_Host *shost = class_to_shost(dev); 2586 struct ibmvfc_host *vhost = shost_priv(shost); 2587 unsigned long flags = 0; 2588 int size = IBMVFC_TRACE_SIZE; 2589 char *src = (char *)vhost->trace; 2590 2591 if (off > size) 2592 return 0; 2593 if (off + count > size) { 2594 size -= off; 2595 count = size; 2596 } 2597 2598 spin_lock_irqsave(shost->host_lock, flags); 2599 memcpy(buf, &src[off], count); 2600 spin_unlock_irqrestore(shost->host_lock, flags); 2601 return count; 2602} 2603 2604static struct bin_attribute ibmvfc_trace_attr = { 2605 .attr = { 2606 .name = "trace", 2607 .mode = S_IRUGO, 2608 }, 2609 .size = 0, 2610 .read = ibmvfc_read_trace, 2611}; 2612#endif 2613 2614static struct device_attribute *ibmvfc_attrs[] = { 2615 &ibmvfc_host_partition_name, 2616 &ibmvfc_host_device_name, 2617 &ibmvfc_host_loc_code, 2618 &ibmvfc_host_drc_name, 2619 &ibmvfc_host_npiv_version, 2620 &ibmvfc_log_level_attr, 2621 NULL 2622}; 2623 2624static struct scsi_host_template driver_template = { 2625 .module = THIS_MODULE, 2626 .name = "IBM POWER Virtual FC Adapter", 2627 .proc_name = IBMVFC_NAME, 2628 .queuecommand = ibmvfc_queuecommand, 2629 .eh_abort_handler = ibmvfc_eh_abort_handler, 2630 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 2631 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 2632 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 2633 .slave_alloc = ibmvfc_slave_alloc, 2634 .slave_configure = ibmvfc_slave_configure, 2635 .target_alloc = ibmvfc_target_alloc, 2636 .scan_finished = ibmvfc_scan_finished, 2637 .change_queue_depth = ibmvfc_change_queue_depth, 2638 .change_queue_type = ibmvfc_change_queue_type, 2639 .cmd_per_lun = 16, 2640 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 2641 .this_id = -1, 2642 .sg_tablesize = SG_ALL, 2643 .max_sectors = IBMVFC_MAX_SECTORS, 2644 .use_clustering = ENABLE_CLUSTERING, 2645 .shost_attrs = ibmvfc_attrs, 2646}; 2647 2648/** 2649 * ibmvfc_next_async_crq - Returns the next entry in async queue 2650 * @vhost: ibmvfc host struct 2651 * 2652 * Returns: 2653 * Pointer to next entry in queue / NULL if empty 2654 **/ 2655static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 2656{ 2657 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 2658 struct ibmvfc_async_crq *crq; 2659 2660 crq = &async_crq->msgs[async_crq->cur]; 2661 if (crq->valid & 0x80) { 2662 if (++async_crq->cur == async_crq->size) 2663 async_crq->cur = 0; 2664 } else 2665 crq = NULL; 2666 2667 return crq; 2668} 2669 2670/** 2671 * ibmvfc_next_crq - Returns the next entry in message queue 2672 * @vhost: ibmvfc host struct 2673 * 2674 * Returns: 2675 * Pointer to next entry in queue / NULL if empty 2676 **/ 2677static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 2678{ 2679 struct ibmvfc_crq_queue *queue = &vhost->crq; 2680 struct ibmvfc_crq *crq; 2681 2682 crq = &queue->msgs[queue->cur]; 2683 if (crq->valid & 0x80) { 2684 if (++queue->cur == queue->size) 2685 queue->cur = 0; 2686 } else 2687 crq = NULL; 2688 2689 return crq; 2690} 2691 2692/** 2693 * ibmvfc_interrupt - Interrupt handler 2694 * @irq: number of irq to handle, not used 2695 * @dev_instance: ibmvfc_host that received interrupt 2696 * 2697 * Returns: 2698 * IRQ_HANDLED 2699 **/ 2700static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 2701{ 2702 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 2703 struct vio_dev *vdev = to_vio_dev(vhost->dev); 2704 struct ibmvfc_crq *crq; 2705 struct ibmvfc_async_crq *async; 2706 unsigned long flags; 2707 int done = 0; 2708 2709 spin_lock_irqsave(vhost->host->host_lock, flags); 2710 vio_disable_interrupts(to_vio_dev(vhost->dev)); 2711 while (!done) { 2712 /* Pull all the valid messages off the CRQ */ 2713 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 2714 ibmvfc_handle_crq(crq, vhost); 2715 crq->valid = 0; 2716 } 2717 2718 /* Pull all the valid messages off the async CRQ */ 2719 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 2720 ibmvfc_handle_async(async, vhost); 2721 async->valid = 0; 2722 } 2723 2724 vio_enable_interrupts(vdev); 2725 if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 2726 vio_disable_interrupts(vdev); 2727 ibmvfc_handle_crq(crq, vhost); 2728 crq->valid = 0; 2729 } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 2730 vio_disable_interrupts(vdev); 2731 ibmvfc_handle_async(async, vhost); 2732 async->valid = 0; 2733 } else 2734 done = 1; 2735 } 2736 2737 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2738 return IRQ_HANDLED; 2739} 2740 2741/** 2742 * ibmvfc_init_tgt - Set the next init job step for the target 2743 * @tgt: ibmvfc target struct 2744 * @job_step: job step to perform 2745 * 2746 **/ 2747static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 2748 void (*job_step) (struct ibmvfc_target *)) 2749{ 2750 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 2751 tgt->job_step = job_step; 2752 wake_up(&tgt->vhost->work_wait_q); 2753} 2754 2755/** 2756 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 2757 * @tgt: ibmvfc target struct 2758 * @job_step: initialization job step 2759 * 2760 **/ 2761static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 2762 void (*job_step) (struct ibmvfc_target *)) 2763{ 2764 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 2765 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2766 wake_up(&tgt->vhost->work_wait_q); 2767 } else 2768 ibmvfc_init_tgt(tgt, job_step); 2769} 2770 2771/** 2772 * ibmvfc_tgt_prli_done - Completion handler for Process Login 2773 * @evt: ibmvfc event struct 2774 * 2775 **/ 2776static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 2777{ 2778 struct ibmvfc_target *tgt = evt->tgt; 2779 struct ibmvfc_host *vhost = evt->vhost; 2780 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 2781 u32 status = rsp->common.status; 2782 2783 vhost->discovery_threads--; 2784 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2785 switch (status) { 2786 case IBMVFC_MAD_SUCCESS: 2787 tgt_dbg(tgt, "Process Login succeeded\n"); 2788 tgt->need_login = 0; 2789 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT); 2790 break; 2791 case IBMVFC_MAD_DRIVER_FAILED: 2792 break; 2793 case IBMVFC_MAD_CRQ_ERROR: 2794 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2795 break; 2796 case IBMVFC_MAD_FAILED: 2797 default: 2798 tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 2799 ibmvfc_get_cmd_error(rsp->status, rsp->error), 2800 rsp->status, rsp->error, status); 2801 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 2802 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2803 else 2804 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2805 break; 2806 }; 2807 2808 kref_put(&tgt->kref, ibmvfc_release_tgt); 2809 ibmvfc_free_event(evt); 2810 wake_up(&vhost->work_wait_q); 2811} 2812 2813/** 2814 * ibmvfc_tgt_send_prli - Send a process login 2815 * @tgt: ibmvfc target struct 2816 * 2817 **/ 2818static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 2819{ 2820 struct ibmvfc_process_login *prli; 2821 struct ibmvfc_host *vhost = tgt->vhost; 2822 struct ibmvfc_event *evt; 2823 2824 if (vhost->discovery_threads >= disc_threads) 2825 return; 2826 2827 kref_get(&tgt->kref); 2828 evt = ibmvfc_get_event(vhost); 2829 vhost->discovery_threads++; 2830 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 2831 evt->tgt = tgt; 2832 prli = &evt->iu.prli; 2833 memset(prli, 0, sizeof(*prli)); 2834 prli->common.version = 1; 2835 prli->common.opcode = IBMVFC_PROCESS_LOGIN; 2836 prli->common.length = sizeof(*prli); 2837 prli->scsi_id = tgt->scsi_id; 2838 2839 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 2840 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; 2841 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; 2842 2843 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 2844 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 2845 vhost->discovery_threads--; 2846 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2847 kref_put(&tgt->kref, ibmvfc_release_tgt); 2848 } else 2849 tgt_dbg(tgt, "Sent process login\n"); 2850} 2851 2852/** 2853 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 2854 * @evt: ibmvfc event struct 2855 * 2856 **/ 2857static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 2858{ 2859 struct ibmvfc_target *tgt = evt->tgt; 2860 struct ibmvfc_host *vhost = evt->vhost; 2861 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 2862 u32 status = rsp->common.status; 2863 2864 vhost->discovery_threads--; 2865 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2866 switch (status) { 2867 case IBMVFC_MAD_SUCCESS: 2868 tgt_dbg(tgt, "Port Login succeeded\n"); 2869 if (tgt->ids.port_name && 2870 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 2871 vhost->reinit = 1; 2872 tgt_dbg(tgt, "Port re-init required\n"); 2873 break; 2874 } 2875 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 2876 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 2877 tgt->ids.port_id = tgt->scsi_id; 2878 tgt->ids.roles = FC_PORT_ROLE_FCP_TARGET; 2879 memcpy(&tgt->service_parms, &rsp->service_parms, 2880 sizeof(tgt->service_parms)); 2881 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 2882 sizeof(tgt->service_parms_change)); 2883 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 2884 break; 2885 case IBMVFC_MAD_DRIVER_FAILED: 2886 break; 2887 case IBMVFC_MAD_CRQ_ERROR: 2888 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 2889 break; 2890 case IBMVFC_MAD_FAILED: 2891 default: 2892 tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 2893 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 2894 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 2895 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); 2896 2897 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 2898 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 2899 else 2900 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2901 break; 2902 }; 2903 2904 kref_put(&tgt->kref, ibmvfc_release_tgt); 2905 ibmvfc_free_event(evt); 2906 wake_up(&vhost->work_wait_q); 2907} 2908 2909/** 2910 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 2911 * @tgt: ibmvfc target struct 2912 * 2913 **/ 2914static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 2915{ 2916 struct ibmvfc_port_login *plogi; 2917 struct ibmvfc_host *vhost = tgt->vhost; 2918 struct ibmvfc_event *evt; 2919 2920 if (vhost->discovery_threads >= disc_threads) 2921 return; 2922 2923 kref_get(&tgt->kref); 2924 evt = ibmvfc_get_event(vhost); 2925 vhost->discovery_threads++; 2926 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 2927 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 2928 evt->tgt = tgt; 2929 plogi = &evt->iu.plogi; 2930 memset(plogi, 0, sizeof(*plogi)); 2931 plogi->common.version = 1; 2932 plogi->common.opcode = IBMVFC_PORT_LOGIN; 2933 plogi->common.length = sizeof(*plogi); 2934 plogi->scsi_id = tgt->scsi_id; 2935 2936 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 2937 vhost->discovery_threads--; 2938 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2939 kref_put(&tgt->kref, ibmvfc_release_tgt); 2940 } else 2941 tgt_dbg(tgt, "Sent port login\n"); 2942} 2943 2944/** 2945 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 2946 * @evt: ibmvfc event struct 2947 * 2948 **/ 2949static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 2950{ 2951 struct ibmvfc_target *tgt = evt->tgt; 2952 struct ibmvfc_host *vhost = evt->vhost; 2953 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 2954 u32 status = rsp->common.status; 2955 2956 vhost->discovery_threads--; 2957 ibmvfc_free_event(evt); 2958 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2959 2960 switch (status) { 2961 case IBMVFC_MAD_SUCCESS: 2962 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 2963 break; 2964 case IBMVFC_MAD_DRIVER_FAILED: 2965 kref_put(&tgt->kref, ibmvfc_release_tgt); 2966 wake_up(&vhost->work_wait_q); 2967 return; 2968 case IBMVFC_MAD_FAILED: 2969 default: 2970 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 2971 break; 2972 }; 2973 2974 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 2975 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 2976 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 2977 tgt->scsi_id != tgt->new_scsi_id) 2978 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2979 kref_put(&tgt->kref, ibmvfc_release_tgt); 2980 wake_up(&vhost->work_wait_q); 2981} 2982 2983/** 2984 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 2985 * @tgt: ibmvfc target struct 2986 * 2987 **/ 2988static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 2989{ 2990 struct ibmvfc_implicit_logout *mad; 2991 struct ibmvfc_host *vhost = tgt->vhost; 2992 struct ibmvfc_event *evt; 2993 2994 if (vhost->discovery_threads >= disc_threads) 2995 return; 2996 2997 kref_get(&tgt->kref); 2998 evt = ibmvfc_get_event(vhost); 2999 vhost->discovery_threads++; 3000 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3001 evt->tgt = tgt; 3002 mad = &evt->iu.implicit_logout; 3003 memset(mad, 0, sizeof(*mad)); 3004 mad->common.version = 1; 3005 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; 3006 mad->common.length = sizeof(*mad); 3007 mad->old_scsi_id = tgt->scsi_id; 3008 3009 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3010 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3011 vhost->discovery_threads--; 3012 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3013 kref_put(&tgt->kref, ibmvfc_release_tgt); 3014 } else 3015 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3016} 3017 3018/** 3019 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3020 * @mad: ibmvfc passthru mad struct 3021 * @tgt: ibmvfc target struct 3022 * 3023 * Returns: 3024 * 1 if PLOGI needed / 0 if PLOGI not needed 3025 **/ 3026static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3027 struct ibmvfc_target *tgt) 3028{ 3029 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3030 sizeof(tgt->ids.port_name))) 3031 return 1; 3032 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3033 sizeof(tgt->ids.node_name))) 3034 return 1; 3035 if (mad->fc_iu.response[6] != tgt->scsi_id) 3036 return 1; 3037 return 0; 3038} 3039 3040/** 3041 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3042 * @evt: ibmvfc event struct 3043 * 3044 **/ 3045static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3046{ 3047 struct ibmvfc_target *tgt = evt->tgt; 3048 struct ibmvfc_host *vhost = evt->vhost; 3049 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3050 u32 status = mad->common.status; 3051 u8 fc_reason, fc_explain; 3052 3053 vhost->discovery_threads--; 3054 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3055 3056 switch (status) { 3057 case IBMVFC_MAD_SUCCESS: 3058 tgt_dbg(tgt, "ADISC succeeded\n"); 3059 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3060 tgt->need_login = 1; 3061 break; 3062 case IBMVFC_MAD_DRIVER_FAILED: 3063 break; 3064 case IBMVFC_MAD_FAILED: 3065 default: 3066 tgt->need_login = 1; 3067 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; 3068 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; 3069 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3070 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), 3071 mad->iu.status, mad->iu.error, 3072 ibmvfc_get_fc_type(fc_reason), fc_reason, 3073 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3074 break; 3075 }; 3076 3077 kref_put(&tgt->kref, ibmvfc_release_tgt); 3078 ibmvfc_free_event(evt); 3079 wake_up(&vhost->work_wait_q); 3080} 3081 3082/** 3083 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3084 * @evt: ibmvfc event struct 3085 * 3086 **/ 3087static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3088{ 3089 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3090 3091 memset(mad, 0, sizeof(*mad)); 3092 mad->common.version = 1; 3093 mad->common.opcode = IBMVFC_PASSTHRU; 3094 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 3095 mad->cmd_ioba.va = (u64)evt->crq.ioba + 3096 offsetof(struct ibmvfc_passthru_mad, iu); 3097 mad->cmd_ioba.len = sizeof(mad->iu); 3098 mad->iu.cmd_len = sizeof(mad->fc_iu.payload); 3099 mad->iu.rsp_len = sizeof(mad->fc_iu.response); 3100 mad->iu.cmd.va = (u64)evt->crq.ioba + 3101 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3102 offsetof(struct ibmvfc_passthru_fc_iu, payload); 3103 mad->iu.cmd.len = sizeof(mad->fc_iu.payload); 3104 mad->iu.rsp.va = (u64)evt->crq.ioba + 3105 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3106 offsetof(struct ibmvfc_passthru_fc_iu, response); 3107 mad->iu.rsp.len = sizeof(mad->fc_iu.response); 3108} 3109 3110/** 3111 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3112 * @tgt: ibmvfc target struct 3113 * 3114 **/ 3115static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3116{ 3117 struct ibmvfc_passthru_mad *mad; 3118 struct ibmvfc_host *vhost = tgt->vhost; 3119 struct ibmvfc_event *evt; 3120 3121 if (vhost->discovery_threads >= disc_threads) 3122 return; 3123 3124 kref_get(&tgt->kref); 3125 evt = ibmvfc_get_event(vhost); 3126 vhost->discovery_threads++; 3127 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3128 evt->tgt = tgt; 3129 3130 ibmvfc_init_passthru(evt); 3131 mad = &evt->iu.passthru; 3132 mad->iu.flags = IBMVFC_FC_ELS; 3133 mad->iu.scsi_id = tgt->scsi_id; 3134 3135 mad->fc_iu.payload[0] = IBMVFC_ADISC; 3136 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3137 sizeof(vhost->login_buf->resp.port_name)); 3138 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3139 sizeof(vhost->login_buf->resp.node_name)); 3140 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; 3141 3142 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3143 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3144 vhost->discovery_threads--; 3145 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3146 kref_put(&tgt->kref, ibmvfc_release_tgt); 3147 } else 3148 tgt_dbg(tgt, "Sent ADISC\n"); 3149} 3150 3151/** 3152 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3153 * @evt: ibmvfc event struct 3154 * 3155 **/ 3156static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3157{ 3158 struct ibmvfc_target *tgt = evt->tgt; 3159 struct ibmvfc_host *vhost = evt->vhost; 3160 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3161 u32 status = rsp->common.status; 3162 3163 vhost->discovery_threads--; 3164 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3165 switch (status) { 3166 case IBMVFC_MAD_SUCCESS: 3167 tgt_dbg(tgt, "Query Target succeeded\n"); 3168 tgt->new_scsi_id = rsp->scsi_id; 3169 if (rsp->scsi_id != tgt->scsi_id) 3170 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3171 else 3172 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3173 break; 3174 case IBMVFC_MAD_DRIVER_FAILED: 3175 break; 3176 case IBMVFC_MAD_CRQ_ERROR: 3177 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3178 break; 3179 case IBMVFC_MAD_FAILED: 3180 default: 3181 tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3182 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3183 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3184 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); 3185 3186 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3187 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && 3188 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) 3189 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3190 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3191 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3192 else 3193 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3194 break; 3195 }; 3196 3197 kref_put(&tgt->kref, ibmvfc_release_tgt); 3198 ibmvfc_free_event(evt); 3199 wake_up(&vhost->work_wait_q); 3200} 3201 3202/** 3203 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3204 * @tgt: ibmvfc target struct 3205 * 3206 **/ 3207static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3208{ 3209 struct ibmvfc_query_tgt *query_tgt; 3210 struct ibmvfc_host *vhost = tgt->vhost; 3211 struct ibmvfc_event *evt; 3212 3213 if (vhost->discovery_threads >= disc_threads) 3214 return; 3215 3216 kref_get(&tgt->kref); 3217 evt = ibmvfc_get_event(vhost); 3218 vhost->discovery_threads++; 3219 evt->tgt = tgt; 3220 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3221 query_tgt = &evt->iu.query_tgt; 3222 memset(query_tgt, 0, sizeof(*query_tgt)); 3223 query_tgt->common.version = 1; 3224 query_tgt->common.opcode = IBMVFC_QUERY_TARGET; 3225 query_tgt->common.length = sizeof(*query_tgt); 3226 query_tgt->wwpn = tgt->ids.port_name; 3227 3228 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3229 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3230 vhost->discovery_threads--; 3231 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3232 kref_put(&tgt->kref, ibmvfc_release_tgt); 3233 } else 3234 tgt_dbg(tgt, "Sent Query Target\n"); 3235} 3236 3237/** 3238 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3239 * @vhost: ibmvfc host struct 3240 * @scsi_id: SCSI ID to allocate target for 3241 * 3242 * Returns: 3243 * 0 on success / other on failure 3244 **/ 3245static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3246{ 3247 struct ibmvfc_target *tgt; 3248 unsigned long flags; 3249 3250 spin_lock_irqsave(vhost->host->host_lock, flags); 3251 list_for_each_entry(tgt, &vhost->targets, queue) { 3252 if (tgt->scsi_id == scsi_id) { 3253 if (tgt->need_login) 3254 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3255 goto unlock_out; 3256 } 3257 } 3258 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3259 3260 tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL); 3261 if (!tgt) { 3262 dev_err(vhost->dev, "Target allocation failure for scsi id %08lx\n", 3263 scsi_id); 3264 return -ENOMEM; 3265 } 3266 3267 tgt->scsi_id = scsi_id; 3268 tgt->new_scsi_id = scsi_id; 3269 tgt->vhost = vhost; 3270 tgt->need_login = 1; 3271 kref_init(&tgt->kref); 3272 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3273 spin_lock_irqsave(vhost->host->host_lock, flags); 3274 list_add_tail(&tgt->queue, &vhost->targets); 3275 3276unlock_out: 3277 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3278 return 0; 3279} 3280 3281/** 3282 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3283 * @vhost: ibmvfc host struct 3284 * 3285 * Returns: 3286 * 0 on success / other on failure 3287 **/ 3288static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3289{ 3290 int i, rc; 3291 3292 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3293 rc = ibmvfc_alloc_target(vhost, 3294 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); 3295 3296 return rc; 3297} 3298 3299/** 3300 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3301 * @evt: ibmvfc event struct 3302 * 3303 **/ 3304static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3305{ 3306 struct ibmvfc_host *vhost = evt->vhost; 3307 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3308 u32 mad_status = rsp->common.status; 3309 3310 switch (mad_status) { 3311 case IBMVFC_MAD_SUCCESS: 3312 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3313 vhost->num_targets = rsp->num_written; 3314 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3315 break; 3316 case IBMVFC_MAD_FAILED: 3317 dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n", 3318 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3319 ibmvfc_retry_host_init(vhost); 3320 break; 3321 case IBMVFC_MAD_DRIVER_FAILED: 3322 break; 3323 default: 3324 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3325 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3326 break; 3327 } 3328 3329 ibmvfc_free_event(evt); 3330 wake_up(&vhost->work_wait_q); 3331} 3332 3333/** 3334 * ibmvfc_discover_targets - Send Discover Targets MAD 3335 * @vhost: ibmvfc host struct 3336 * 3337 **/ 3338static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3339{ 3340 struct ibmvfc_discover_targets *mad; 3341 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3342 3343 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3344 mad = &evt->iu.discover_targets; 3345 memset(mad, 0, sizeof(*mad)); 3346 mad->common.version = 1; 3347 mad->common.opcode = IBMVFC_DISC_TARGETS; 3348 mad->common.length = sizeof(*mad); 3349 mad->bufflen = vhost->disc_buf_sz; 3350 mad->buffer.va = vhost->disc_buf_dma; 3351 mad->buffer.len = vhost->disc_buf_sz; 3352 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3353 3354 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3355 ibmvfc_dbg(vhost, "Sent discover targets\n"); 3356 else 3357 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3358} 3359 3360/** 3361 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 3362 * @evt: ibmvfc event struct 3363 * 3364 **/ 3365static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 3366{ 3367 struct ibmvfc_host *vhost = evt->vhost; 3368 u32 mad_status = evt->xfer_iu->npiv_login.common.status; 3369 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 3370 unsigned int npiv_max_sectors; 3371 3372 switch (mad_status) { 3373 case IBMVFC_MAD_SUCCESS: 3374 ibmvfc_free_event(evt); 3375 break; 3376 case IBMVFC_MAD_FAILED: 3377 dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n", 3378 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3379 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3380 ibmvfc_retry_host_init(vhost); 3381 else 3382 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3383 ibmvfc_free_event(evt); 3384 return; 3385 case IBMVFC_MAD_CRQ_ERROR: 3386 ibmvfc_retry_host_init(vhost); 3387 case IBMVFC_MAD_DRIVER_FAILED: 3388 ibmvfc_free_event(evt); 3389 return; 3390 default: 3391 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 3392 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3393 ibmvfc_free_event(evt); 3394 return; 3395 } 3396 3397 vhost->client_migrated = 0; 3398 3399 if (!(rsp->flags & IBMVFC_NATIVE_FC)) { 3400 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 3401 rsp->flags); 3402 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3403 wake_up(&vhost->work_wait_q); 3404 return; 3405 } 3406 3407 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { 3408 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 3409 rsp->max_cmds); 3410 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3411 wake_up(&vhost->work_wait_q); 3412 return; 3413 } 3414 3415 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); 3416 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 3417 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 3418 rsp->drc_name, npiv_max_sectors); 3419 3420 fc_host_fabric_name(vhost->host) = rsp->node_name; 3421 fc_host_node_name(vhost->host) = rsp->node_name; 3422 fc_host_port_name(vhost->host) = rsp->port_name; 3423 fc_host_port_id(vhost->host) = rsp->scsi_id; 3424 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 3425 fc_host_supported_classes(vhost->host) = 0; 3426 if (rsp->service_parms.class1_parms[0] & 0x80000000) 3427 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 3428 if (rsp->service_parms.class2_parms[0] & 0x80000000) 3429 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 3430 if (rsp->service_parms.class3_parms[0] & 0x80000000) 3431 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 3432 fc_host_maxframe_size(vhost->host) = 3433 rsp->service_parms.common.bb_rcv_sz & 0x0fff; 3434 3435 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; 3436 vhost->host->max_sectors = npiv_max_sectors; 3437 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 3438 wake_up(&vhost->work_wait_q); 3439} 3440 3441/** 3442 * ibmvfc_npiv_login - Sends NPIV login 3443 * @vhost: ibmvfc host struct 3444 * 3445 **/ 3446static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 3447{ 3448 struct ibmvfc_npiv_login_mad *mad; 3449 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3450 3451 ibmvfc_gather_partition_info(vhost); 3452 ibmvfc_set_login_info(vhost); 3453 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 3454 3455 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 3456 mad = &evt->iu.npiv_login; 3457 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 3458 mad->common.version = 1; 3459 mad->common.opcode = IBMVFC_NPIV_LOGIN; 3460 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); 3461 mad->buffer.va = vhost->login_buf_dma; 3462 mad->buffer.len = sizeof(*vhost->login_buf); 3463 3464 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3465 3466 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3467 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 3468 else 3469 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3470}; 3471 3472/** 3473 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 3474 * @vhost: ibmvfc host struct 3475 * 3476 * Returns: 3477 * 1 if work to do / 0 if not 3478 **/ 3479static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 3480{ 3481 struct ibmvfc_target *tgt; 3482 3483 list_for_each_entry(tgt, &vhost->targets, queue) { 3484 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 3485 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 3486 return 1; 3487 } 3488 3489 return 0; 3490} 3491 3492/** 3493 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 3494 * @vhost: ibmvfc host struct 3495 * 3496 * Returns: 3497 * 1 if work to do / 0 if not 3498 **/ 3499static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 3500{ 3501 struct ibmvfc_target *tgt; 3502 3503 if (kthread_should_stop()) 3504 return 1; 3505 switch (vhost->action) { 3506 case IBMVFC_HOST_ACTION_NONE: 3507 case IBMVFC_HOST_ACTION_INIT_WAIT: 3508 return 0; 3509 case IBMVFC_HOST_ACTION_TGT_INIT: 3510 case IBMVFC_HOST_ACTION_QUERY_TGTS: 3511 if (vhost->discovery_threads == disc_threads) 3512 return 0; 3513 list_for_each_entry(tgt, &vhost->targets, queue) 3514 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 3515 return 1; 3516 list_for_each_entry(tgt, &vhost->targets, queue) 3517 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 3518 return 0; 3519 return 1; 3520 case IBMVFC_HOST_ACTION_INIT: 3521 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 3522 case IBMVFC_HOST_ACTION_TGT_ADD: 3523 case IBMVFC_HOST_ACTION_TGT_DEL: 3524 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 3525 case IBMVFC_HOST_ACTION_QUERY: 3526 default: 3527 break; 3528 }; 3529 3530 return 1; 3531} 3532 3533/** 3534 * ibmvfc_work_to_do - Is there task level work to do? 3535 * @vhost: ibmvfc host struct 3536 * 3537 * Returns: 3538 * 1 if work to do / 0 if not 3539 **/ 3540static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 3541{ 3542 unsigned long flags; 3543 int rc; 3544 3545 spin_lock_irqsave(vhost->host->host_lock, flags); 3546 rc = __ibmvfc_work_to_do(vhost); 3547 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3548 return rc; 3549} 3550 3551/** 3552 * ibmvfc_log_ae - Log async events if necessary 3553 * @vhost: ibmvfc host struct 3554 * @events: events to log 3555 * 3556 **/ 3557static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 3558{ 3559 if (events & IBMVFC_AE_RSCN) 3560 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 3561 if ((events & IBMVFC_AE_LINKDOWN) && 3562 vhost->state >= IBMVFC_HALTED) 3563 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 3564 if ((events & IBMVFC_AE_LINKUP) && 3565 vhost->state == IBMVFC_INITIALIZING) 3566 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 3567} 3568 3569/** 3570 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 3571 * @tgt: ibmvfc target struct 3572 * 3573 **/ 3574static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 3575{ 3576 struct ibmvfc_host *vhost = tgt->vhost; 3577 struct fc_rport *rport; 3578 unsigned long flags; 3579 3580 tgt_dbg(tgt, "Adding rport\n"); 3581 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 3582 spin_lock_irqsave(vhost->host->host_lock, flags); 3583 tgt->rport = rport; 3584 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3585 if (rport) { 3586 tgt_dbg(tgt, "rport add succeeded\n"); 3587 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; 3588 rport->supported_classes = 0; 3589 tgt->target_id = rport->scsi_target_id; 3590 if (tgt->service_parms.class1_parms[0] & 0x80000000) 3591 rport->supported_classes |= FC_COS_CLASS1; 3592 if (tgt->service_parms.class2_parms[0] & 0x80000000) 3593 rport->supported_classes |= FC_COS_CLASS2; 3594 if (tgt->service_parms.class3_parms[0] & 0x80000000) 3595 rport->supported_classes |= FC_COS_CLASS3; 3596 } else 3597 tgt_dbg(tgt, "rport add failed\n"); 3598 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3599} 3600 3601/** 3602 * ibmvfc_do_work - Do task level work 3603 * @vhost: ibmvfc host struct 3604 * 3605 **/ 3606static void ibmvfc_do_work(struct ibmvfc_host *vhost) 3607{ 3608 struct ibmvfc_target *tgt; 3609 unsigned long flags; 3610 struct fc_rport *rport; 3611 3612 ibmvfc_log_ae(vhost, vhost->events_to_log); 3613 spin_lock_irqsave(vhost->host->host_lock, flags); 3614 vhost->events_to_log = 0; 3615 switch (vhost->action) { 3616 case IBMVFC_HOST_ACTION_NONE: 3617 case IBMVFC_HOST_ACTION_INIT_WAIT: 3618 break; 3619 case IBMVFC_HOST_ACTION_INIT: 3620 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 3621 if (vhost->delay_init) { 3622 vhost->delay_init = 0; 3623 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3624 ssleep(15); 3625 return; 3626 } else 3627 vhost->job_step(vhost); 3628 break; 3629 case IBMVFC_HOST_ACTION_QUERY: 3630 list_for_each_entry(tgt, &vhost->targets, queue) 3631 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 3632 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 3633 break; 3634 case IBMVFC_HOST_ACTION_QUERY_TGTS: 3635 list_for_each_entry(tgt, &vhost->targets, queue) { 3636 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 3637 tgt->job_step(tgt); 3638 break; 3639 } 3640 } 3641 3642 if (!ibmvfc_dev_init_to_do(vhost)) 3643 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 3644 break; 3645 case IBMVFC_HOST_ACTION_TGT_DEL: 3646 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 3647 list_for_each_entry(tgt, &vhost->targets, queue) { 3648 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 3649 tgt_dbg(tgt, "Deleting rport\n"); 3650 rport = tgt->rport; 3651 tgt->rport = NULL; 3652 list_del(&tgt->queue); 3653 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3654 if (rport) 3655 fc_remote_port_delete(rport); 3656 kref_put(&tgt->kref, ibmvfc_release_tgt); 3657 return; 3658 } 3659 } 3660 3661 if (vhost->state == IBMVFC_INITIALIZING) { 3662 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 3663 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 3664 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD); 3665 vhost->init_retries = 0; 3666 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3667 scsi_unblock_requests(vhost->host); 3668 return; 3669 } else { 3670 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 3671 vhost->job_step = ibmvfc_discover_targets; 3672 } 3673 } else { 3674 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3675 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3676 scsi_unblock_requests(vhost->host); 3677 wake_up(&vhost->init_wait_q); 3678 return; 3679 } 3680 break; 3681 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 3682 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 3683 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3684 ibmvfc_alloc_targets(vhost); 3685 spin_lock_irqsave(vhost->host->host_lock, flags); 3686 break; 3687 case IBMVFC_HOST_ACTION_TGT_INIT: 3688 list_for_each_entry(tgt, &vhost->targets, queue) { 3689 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 3690 tgt->job_step(tgt); 3691 break; 3692 } 3693 } 3694 3695 if (!ibmvfc_dev_init_to_do(vhost)) 3696 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 3697 break; 3698 case IBMVFC_HOST_ACTION_TGT_ADD: 3699 list_for_each_entry(tgt, &vhost->targets, queue) { 3700 if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) { 3701 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3702 ibmvfc_tgt_add_rport(tgt); 3703 return; 3704 } 3705 } 3706 3707 if (vhost->reinit && !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 3708 vhost->reinit = 0; 3709 scsi_block_requests(vhost->host); 3710 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 3711 } else { 3712 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3713 wake_up(&vhost->init_wait_q); 3714 } 3715 break; 3716 default: 3717 break; 3718 }; 3719 3720 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3721} 3722 3723/** 3724 * ibmvfc_work - Do task level work 3725 * @data: ibmvfc host struct 3726 * 3727 * Returns: 3728 * zero 3729 **/ 3730static int ibmvfc_work(void *data) 3731{ 3732 struct ibmvfc_host *vhost = data; 3733 int rc; 3734 3735 set_user_nice(current, -20); 3736 3737 while (1) { 3738 rc = wait_event_interruptible(vhost->work_wait_q, 3739 ibmvfc_work_to_do(vhost)); 3740 3741 BUG_ON(rc); 3742 3743 if (kthread_should_stop()) 3744 break; 3745 3746 ibmvfc_do_work(vhost); 3747 } 3748 3749 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 3750 return 0; 3751} 3752 3753/** 3754 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 3755 * @vhost: ibmvfc host struct 3756 * 3757 * Allocates a page for messages, maps it for dma, and registers 3758 * the crq with the hypervisor. 3759 * 3760 * Return value: 3761 * zero on success / other on failure 3762 **/ 3763static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 3764{ 3765 int rc, retrc = -ENOMEM; 3766 struct device *dev = vhost->dev; 3767 struct vio_dev *vdev = to_vio_dev(dev); 3768 struct ibmvfc_crq_queue *crq = &vhost->crq; 3769 3770 ENTER; 3771 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 3772 3773 if (!crq->msgs) 3774 return -ENOMEM; 3775 3776 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 3777 crq->msg_token = dma_map_single(dev, crq->msgs, 3778 PAGE_SIZE, DMA_BIDIRECTIONAL); 3779 3780 if (dma_mapping_error(dev, crq->msg_token)) 3781 goto map_failed; 3782 3783 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3784 crq->msg_token, PAGE_SIZE); 3785 3786 if (rc == H_RESOURCE) 3787 /* maybe kexecing and resource is busy. try a reset */ 3788 retrc = rc = ibmvfc_reset_crq(vhost); 3789 3790 if (rc == H_CLOSED) 3791 dev_warn(dev, "Partner adapter not ready\n"); 3792 else if (rc) { 3793 dev_warn(dev, "Error %d opening adapter\n", rc); 3794 goto reg_crq_failed; 3795 } 3796 3797 retrc = 0; 3798 3799 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 3800 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 3801 goto req_irq_failed; 3802 } 3803 3804 if ((rc = vio_enable_interrupts(vdev))) { 3805 dev_err(dev, "Error %d enabling interrupts\n", rc); 3806 goto req_irq_failed; 3807 } 3808 3809 crq->cur = 0; 3810 LEAVE; 3811 return retrc; 3812 3813req_irq_failed: 3814 do { 3815 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3816 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3817reg_crq_failed: 3818 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 3819map_failed: 3820 free_page((unsigned long)crq->msgs); 3821 return retrc; 3822} 3823 3824/** 3825 * ibmvfc_free_mem - Free memory for vhost 3826 * @vhost: ibmvfc host struct 3827 * 3828 * Return value: 3829 * none 3830 **/ 3831static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 3832{ 3833 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 3834 3835 ENTER; 3836 mempool_destroy(vhost->tgt_pool); 3837 kfree(vhost->trace); 3838 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 3839 vhost->disc_buf_dma); 3840 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 3841 vhost->login_buf, vhost->login_buf_dma); 3842 dma_pool_destroy(vhost->sg_pool); 3843 dma_unmap_single(vhost->dev, async_q->msg_token, 3844 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 3845 free_page((unsigned long)async_q->msgs); 3846 LEAVE; 3847} 3848 3849/** 3850 * ibmvfc_alloc_mem - Allocate memory for vhost 3851 * @vhost: ibmvfc host struct 3852 * 3853 * Return value: 3854 * 0 on success / non-zero on failure 3855 **/ 3856static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 3857{ 3858 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 3859 struct device *dev = vhost->dev; 3860 3861 ENTER; 3862 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 3863 if (!async_q->msgs) { 3864 dev_err(dev, "Couldn't allocate async queue.\n"); 3865 goto nomem; 3866 } 3867 3868 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 3869 async_q->msg_token = dma_map_single(dev, async_q->msgs, 3870 async_q->size * sizeof(*async_q->msgs), 3871 DMA_BIDIRECTIONAL); 3872 3873 if (dma_mapping_error(dev, async_q->msg_token)) { 3874 dev_err(dev, "Failed to map async queue\n"); 3875 goto free_async_crq; 3876 } 3877 3878 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 3879 SG_ALL * sizeof(struct srp_direct_buf), 3880 sizeof(struct srp_direct_buf), 0); 3881 3882 if (!vhost->sg_pool) { 3883 dev_err(dev, "Failed to allocate sg pool\n"); 3884 goto unmap_async_crq; 3885 } 3886 3887 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 3888 &vhost->login_buf_dma, GFP_KERNEL); 3889 3890 if (!vhost->login_buf) { 3891 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 3892 goto free_sg_pool; 3893 } 3894 3895 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 3896 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 3897 &vhost->disc_buf_dma, GFP_KERNEL); 3898 3899 if (!vhost->disc_buf) { 3900 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 3901 goto free_login_buffer; 3902 } 3903 3904 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 3905 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 3906 3907 if (!vhost->trace) 3908 goto free_disc_buffer; 3909 3910 vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 3911 sizeof(struct ibmvfc_target)); 3912 3913 if (!vhost->tgt_pool) { 3914 dev_err(dev, "Couldn't allocate target memory pool\n"); 3915 goto free_trace; 3916 } 3917 3918 LEAVE; 3919 return 0; 3920 3921free_trace: 3922 kfree(vhost->trace); 3923free_disc_buffer: 3924 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 3925 vhost->disc_buf_dma); 3926free_login_buffer: 3927 dma_free_coherent(dev, sizeof(*vhost->login_buf), 3928 vhost->login_buf, vhost->login_buf_dma); 3929free_sg_pool: 3930 dma_pool_destroy(vhost->sg_pool); 3931unmap_async_crq: 3932 dma_unmap_single(dev, async_q->msg_token, 3933 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 3934free_async_crq: 3935 free_page((unsigned long)async_q->msgs); 3936nomem: 3937 LEAVE; 3938 return -ENOMEM; 3939} 3940 3941/** 3942 * ibmvfc_probe - Adapter hot plug add entry point 3943 * @vdev: vio device struct 3944 * @id: vio device id struct 3945 * 3946 * Return value: 3947 * 0 on success / non-zero on failure 3948 **/ 3949static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 3950{ 3951 struct ibmvfc_host *vhost; 3952 struct Scsi_Host *shost; 3953 struct device *dev = &vdev->dev; 3954 int rc = -ENOMEM; 3955 3956 ENTER; 3957 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 3958 if (!shost) { 3959 dev_err(dev, "Couldn't allocate host data\n"); 3960 goto out; 3961 } 3962 3963 shost->transportt = ibmvfc_transport_template; 3964 shost->can_queue = max_requests; 3965 shost->max_lun = max_lun; 3966 shost->max_id = max_targets; 3967 shost->max_sectors = IBMVFC_MAX_SECTORS; 3968 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 3969 shost->unique_id = shost->host_no; 3970 3971 vhost = shost_priv(shost); 3972 INIT_LIST_HEAD(&vhost->sent); 3973 INIT_LIST_HEAD(&vhost->free); 3974 INIT_LIST_HEAD(&vhost->targets); 3975 sprintf(vhost->name, IBMVFC_NAME); 3976 vhost->host = shost; 3977 vhost->dev = dev; 3978 vhost->partition_number = -1; 3979 vhost->log_level = log_level; 3980 strcpy(vhost->partition_name, "UNKNOWN"); 3981 init_waitqueue_head(&vhost->work_wait_q); 3982 init_waitqueue_head(&vhost->init_wait_q); 3983 3984 if ((rc = ibmvfc_alloc_mem(vhost))) 3985 goto free_scsi_host; 3986 3987 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 3988 shost->host_no); 3989 3990 if (IS_ERR(vhost->work_thread)) { 3991 dev_err(dev, "Couldn't create kernel thread: %ld\n", 3992 PTR_ERR(vhost->work_thread)); 3993 goto free_host_mem; 3994 } 3995 3996 if ((rc = ibmvfc_init_crq(vhost))) { 3997 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 3998 goto kill_kthread; 3999 } 4000 4001 if ((rc = ibmvfc_init_event_pool(vhost))) { 4002 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4003 goto release_crq; 4004 } 4005 4006 if ((rc = scsi_add_host(shost, dev))) 4007 goto release_event_pool; 4008 4009 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4010 &ibmvfc_trace_attr))) { 4011 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4012 goto remove_shost; 4013 } 4014 4015 dev_set_drvdata(dev, vhost); 4016 spin_lock(&ibmvfc_driver_lock); 4017 list_add_tail(&vhost->queue, &ibmvfc_head); 4018 spin_unlock(&ibmvfc_driver_lock); 4019 4020 ibmvfc_send_crq_init(vhost); 4021 scsi_scan_host(shost); 4022 return 0; 4023 4024remove_shost: 4025 scsi_remove_host(shost); 4026release_event_pool: 4027 ibmvfc_free_event_pool(vhost); 4028release_crq: 4029 ibmvfc_release_crq_queue(vhost); 4030kill_kthread: 4031 kthread_stop(vhost->work_thread); 4032free_host_mem: 4033 ibmvfc_free_mem(vhost); 4034free_scsi_host: 4035 scsi_host_put(shost); 4036out: 4037 LEAVE; 4038 return rc; 4039} 4040 4041/** 4042 * ibmvfc_remove - Adapter hot plug remove entry point 4043 * @vdev: vio device struct 4044 * 4045 * Return value: 4046 * 0 4047 **/ 4048static int ibmvfc_remove(struct vio_dev *vdev) 4049{ 4050 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4051 unsigned long flags; 4052 4053 ENTER; 4054 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4055 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4056 ibmvfc_wait_while_resetting(vhost); 4057 ibmvfc_release_crq_queue(vhost); 4058 kthread_stop(vhost->work_thread); 4059 fc_remove_host(vhost->host); 4060 scsi_remove_host(vhost->host); 4061 4062 spin_lock_irqsave(vhost->host->host_lock, flags); 4063 ibmvfc_purge_requests(vhost, DID_ERROR); 4064 ibmvfc_free_event_pool(vhost); 4065 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4066 4067 ibmvfc_free_mem(vhost); 4068 spin_lock(&ibmvfc_driver_lock); 4069 list_del(&vhost->queue); 4070 spin_unlock(&ibmvfc_driver_lock); 4071 scsi_host_put(vhost->host); 4072 LEAVE; 4073 return 0; 4074} 4075 4076/** 4077 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4078 * @vdev: vio device struct 4079 * 4080 * Return value: 4081 * Number of bytes the driver will need to DMA map at the same time in 4082 * order to perform well. 4083 */ 4084static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4085{ 4086 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4087 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4088} 4089 4090static struct vio_device_id ibmvfc_device_table[] __devinitdata = { 4091 {"fcp", "IBM,vfc-client"}, 4092 { "", "" } 4093}; 4094MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4095 4096static struct vio_driver ibmvfc_driver = { 4097 .id_table = ibmvfc_device_table, 4098 .probe = ibmvfc_probe, 4099 .remove = ibmvfc_remove, 4100 .get_desired_dma = ibmvfc_get_desired_dma, 4101 .driver = { 4102 .name = IBMVFC_NAME, 4103 .owner = THIS_MODULE, 4104 } 4105}; 4106 4107static struct fc_function_template ibmvfc_transport_functions = { 4108 .show_host_fabric_name = 1, 4109 .show_host_node_name = 1, 4110 .show_host_port_name = 1, 4111 .show_host_supported_classes = 1, 4112 .show_host_port_type = 1, 4113 .show_host_port_id = 1, 4114 4115 .get_host_port_state = ibmvfc_get_host_port_state, 4116 .show_host_port_state = 1, 4117 4118 .get_host_speed = ibmvfc_get_host_speed, 4119 .show_host_speed = 1, 4120 4121 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4122 .terminate_rport_io = ibmvfc_terminate_rport_io, 4123 4124 .show_rport_maxframe_size = 1, 4125 .show_rport_supported_classes = 1, 4126 4127 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4128 .show_rport_dev_loss_tmo = 1, 4129 4130 .get_starget_node_name = ibmvfc_get_starget_node_name, 4131 .show_starget_node_name = 1, 4132 4133 .get_starget_port_name = ibmvfc_get_starget_port_name, 4134 .show_starget_port_name = 1, 4135 4136 .get_starget_port_id = ibmvfc_get_starget_port_id, 4137 .show_starget_port_id = 1, 4138}; 4139 4140/** 4141 * ibmvfc_module_init - Initialize the ibmvfc module 4142 * 4143 * Return value: 4144 * 0 on success / other on failure 4145 **/ 4146static int __init ibmvfc_module_init(void) 4147{ 4148 int rc; 4149 4150 if (!firmware_has_feature(FW_FEATURE_VIO)) 4151 return -ENODEV; 4152 4153 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4154 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4155 4156 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4157 if (!ibmvfc_transport_template) 4158 return -ENOMEM; 4159 4160 rc = vio_register_driver(&ibmvfc_driver); 4161 if (rc) 4162 fc_release_transport(ibmvfc_transport_template); 4163 return rc; 4164} 4165 4166/** 4167 * ibmvfc_module_exit - Teardown the ibmvfc module 4168 * 4169 * Return value: 4170 * nothing 4171 **/ 4172static void __exit ibmvfc_module_exit(void) 4173{ 4174 vio_unregister_driver(&ibmvfc_driver); 4175 fc_release_transport(ibmvfc_transport_template); 4176} 4177 4178module_init(ibmvfc_module_init); 4179module_exit(ibmvfc_module_exit); 4180