ibmvfc.c revision 10e794996ed00a0f09ff0745f87e3a3dd5de4606
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_NO_CONNECT, 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_ABORT, 0, 1, "invalid parameter" }, 119 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ABORT, 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_ABORT, 0, 1, "transaction cancelled" }, 122 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ABORT, 0, 1, "transaction cancelled implicit" }, 123 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 124 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 125 126 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 128 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 129 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 130 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 131 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 132 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 133 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 134 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 135 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 136 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 137 138 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 139}; 140 141static void ibmvfc_npiv_login(struct ibmvfc_host *); 142static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 143static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 144static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 145 146static const char *unknown_error = "unknown error"; 147 148#ifdef CONFIG_SCSI_IBMVFC_TRACE 149/** 150 * ibmvfc_trc_start - Log a start trace entry 151 * @evt: ibmvfc event struct 152 * 153 **/ 154static void ibmvfc_trc_start(struct ibmvfc_event *evt) 155{ 156 struct ibmvfc_host *vhost = evt->vhost; 157 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 158 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 159 struct ibmvfc_trace_entry *entry; 160 161 entry = &vhost->trace[vhost->trace_index++]; 162 entry->evt = evt; 163 entry->time = jiffies; 164 entry->fmt = evt->crq.format; 165 entry->type = IBMVFC_TRC_START; 166 167 switch (entry->fmt) { 168 case IBMVFC_CMD_FORMAT: 169 entry->op_code = vfc_cmd->iu.cdb[0]; 170 entry->scsi_id = vfc_cmd->tgt_scsi_id; 171 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 172 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 173 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; 174 break; 175 case IBMVFC_MAD_FORMAT: 176 entry->op_code = mad->opcode; 177 break; 178 default: 179 break; 180 }; 181} 182 183/** 184 * ibmvfc_trc_end - Log an end trace entry 185 * @evt: ibmvfc event struct 186 * 187 **/ 188static void ibmvfc_trc_end(struct ibmvfc_event *evt) 189{ 190 struct ibmvfc_host *vhost = evt->vhost; 191 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 192 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 193 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; 194 195 entry->evt = evt; 196 entry->time = jiffies; 197 entry->fmt = evt->crq.format; 198 entry->type = IBMVFC_TRC_END; 199 200 switch (entry->fmt) { 201 case IBMVFC_CMD_FORMAT: 202 entry->op_code = vfc_cmd->iu.cdb[0]; 203 entry->scsi_id = vfc_cmd->tgt_scsi_id; 204 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 205 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 206 entry->u.end.status = vfc_cmd->status; 207 entry->u.end.error = vfc_cmd->error; 208 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; 209 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; 210 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; 211 break; 212 case IBMVFC_MAD_FORMAT: 213 entry->op_code = mad->opcode; 214 entry->u.end.status = mad->status; 215 break; 216 default: 217 break; 218 219 }; 220} 221 222#else 223#define ibmvfc_trc_start(evt) do { } while (0) 224#define ibmvfc_trc_end(evt) do { } while (0) 225#endif 226 227/** 228 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 229 * @status: status / error class 230 * @error: error 231 * 232 * Return value: 233 * index into cmd_status / -EINVAL on failure 234 **/ 235static int ibmvfc_get_err_index(u16 status, u16 error) 236{ 237 int i; 238 239 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 240 if ((cmd_status[i].status & status) == cmd_status[i].status && 241 cmd_status[i].error == error) 242 return i; 243 244 return -EINVAL; 245} 246 247/** 248 * ibmvfc_get_cmd_error - Find the error description for the fcp response 249 * @status: status / error class 250 * @error: error 251 * 252 * Return value: 253 * error description string 254 **/ 255static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 256{ 257 int rc = ibmvfc_get_err_index(status, error); 258 if (rc >= 0) 259 return cmd_status[rc].name; 260 return unknown_error; 261} 262 263/** 264 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 265 * @vfc_cmd: ibmvfc command struct 266 * 267 * Return value: 268 * SCSI result value to return for completed command 269 **/ 270static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) 271{ 272 int err; 273 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 274 int fc_rsp_len = rsp->fcp_rsp_len; 275 276 if ((rsp->flags & FCP_RSP_LEN_VALID) && 277 ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 278 rsp->data.info.rsp_code)) 279 return DID_ERROR << 16; 280 281 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 282 if (err >= 0) 283 return rsp->scsi_status | (cmd_status[err].result << 16); 284 return rsp->scsi_status | (DID_ERROR << 16); 285} 286 287/** 288 * ibmvfc_retry_cmd - Determine if error status is retryable 289 * @status: status / error class 290 * @error: error 291 * 292 * Return value: 293 * 1 if error should be retried / 0 if it should not 294 **/ 295static int ibmvfc_retry_cmd(u16 status, u16 error) 296{ 297 int rc = ibmvfc_get_err_index(status, error); 298 299 if (rc >= 0) 300 return cmd_status[rc].retry; 301 return 1; 302} 303 304static const char *unknown_fc_explain = "unknown fc explain"; 305 306static const struct { 307 u16 fc_explain; 308 char *name; 309} ls_explain [] = { 310 { 0x00, "no additional explanation" }, 311 { 0x01, "service parameter error - options" }, 312 { 0x03, "service parameter error - initiator control" }, 313 { 0x05, "service parameter error - recipient control" }, 314 { 0x07, "service parameter error - received data field size" }, 315 { 0x09, "service parameter error - concurrent seq" }, 316 { 0x0B, "service parameter error - credit" }, 317 { 0x0D, "invalid N_Port/F_Port_Name" }, 318 { 0x0E, "invalid node/Fabric Name" }, 319 { 0x0F, "invalid common service parameters" }, 320 { 0x11, "invalid association header" }, 321 { 0x13, "association header required" }, 322 { 0x15, "invalid originator S_ID" }, 323 { 0x17, "invalid OX_ID-RX-ID combination" }, 324 { 0x19, "command (request) already in progress" }, 325 { 0x1E, "N_Port Login requested" }, 326 { 0x1F, "Invalid N_Port_ID" }, 327}; 328 329static const struct { 330 u16 fc_explain; 331 char *name; 332} gs_explain [] = { 333 { 0x00, "no additional explanation" }, 334 { 0x01, "port identifier not registered" }, 335 { 0x02, "port name not registered" }, 336 { 0x03, "node name not registered" }, 337 { 0x04, "class of service not registered" }, 338 { 0x06, "initial process associator not registered" }, 339 { 0x07, "FC-4 TYPEs not registered" }, 340 { 0x08, "symbolic port name not registered" }, 341 { 0x09, "symbolic node name not registered" }, 342 { 0x0A, "port type not registered" }, 343 { 0xF0, "authorization exception" }, 344 { 0xF1, "authentication exception" }, 345 { 0xF2, "data base full" }, 346 { 0xF3, "data base empty" }, 347 { 0xF4, "processing request" }, 348 { 0xF5, "unable to verify connection" }, 349 { 0xF6, "devices not in a common zone" }, 350}; 351 352/** 353 * ibmvfc_get_ls_explain - Return the FC Explain description text 354 * @status: FC Explain status 355 * 356 * Returns: 357 * error string 358 **/ 359static const char *ibmvfc_get_ls_explain(u16 status) 360{ 361 int i; 362 363 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 364 if (ls_explain[i].fc_explain == status) 365 return ls_explain[i].name; 366 367 return unknown_fc_explain; 368} 369 370/** 371 * ibmvfc_get_gs_explain - Return the FC Explain description text 372 * @status: FC Explain status 373 * 374 * Returns: 375 * error string 376 **/ 377static const char *ibmvfc_get_gs_explain(u16 status) 378{ 379 int i; 380 381 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 382 if (gs_explain[i].fc_explain == status) 383 return gs_explain[i].name; 384 385 return unknown_fc_explain; 386} 387 388static const struct { 389 enum ibmvfc_fc_type fc_type; 390 char *name; 391} fc_type [] = { 392 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 393 { IBMVFC_PORT_REJECT, "port reject" }, 394 { IBMVFC_LS_REJECT, "ELS reject" }, 395 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 396 { IBMVFC_PORT_BUSY, "port busy" }, 397 { IBMVFC_BASIC_REJECT, "basic reject" }, 398}; 399 400static const char *unknown_fc_type = "unknown fc type"; 401 402/** 403 * ibmvfc_get_fc_type - Return the FC Type description text 404 * @status: FC Type error status 405 * 406 * Returns: 407 * error string 408 **/ 409static const char *ibmvfc_get_fc_type(u16 status) 410{ 411 int i; 412 413 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 414 if (fc_type[i].fc_type == status) 415 return fc_type[i].name; 416 417 return unknown_fc_type; 418} 419 420/** 421 * ibmvfc_set_tgt_action - Set the next init action for the target 422 * @tgt: ibmvfc target struct 423 * @action: action to perform 424 * 425 **/ 426static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 427 enum ibmvfc_target_action action) 428{ 429 switch (tgt->action) { 430 case IBMVFC_TGT_ACTION_DEL_RPORT: 431 break; 432 default: 433 tgt->action = action; 434 break; 435 } 436} 437 438/** 439 * ibmvfc_set_host_state - Set the state for the host 440 * @vhost: ibmvfc host struct 441 * @state: state to set host to 442 * 443 * Returns: 444 * 0 if state changed / non-zero if not changed 445 **/ 446static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 447 enum ibmvfc_host_state state) 448{ 449 int rc = 0; 450 451 switch (vhost->state) { 452 case IBMVFC_HOST_OFFLINE: 453 rc = -EINVAL; 454 break; 455 default: 456 vhost->state = state; 457 break; 458 }; 459 460 return rc; 461} 462 463/** 464 * ibmvfc_set_host_action - Set the next init action for the host 465 * @vhost: ibmvfc host struct 466 * @action: action to perform 467 * 468 **/ 469static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 470 enum ibmvfc_host_action action) 471{ 472 switch (action) { 473 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 474 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 475 vhost->action = action; 476 break; 477 case IBMVFC_HOST_ACTION_INIT_WAIT: 478 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 479 vhost->action = action; 480 break; 481 case IBMVFC_HOST_ACTION_QUERY: 482 switch (vhost->action) { 483 case IBMVFC_HOST_ACTION_INIT_WAIT: 484 case IBMVFC_HOST_ACTION_NONE: 485 case IBMVFC_HOST_ACTION_TGT_ADD: 486 vhost->action = action; 487 break; 488 default: 489 break; 490 }; 491 break; 492 case IBMVFC_HOST_ACTION_TGT_INIT: 493 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 494 vhost->action = action; 495 break; 496 case IBMVFC_HOST_ACTION_INIT: 497 case IBMVFC_HOST_ACTION_TGT_DEL: 498 case IBMVFC_HOST_ACTION_QUERY_TGTS: 499 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 500 case IBMVFC_HOST_ACTION_TGT_ADD: 501 case IBMVFC_HOST_ACTION_NONE: 502 default: 503 vhost->action = action; 504 break; 505 }; 506} 507 508/** 509 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 510 * @vhost: ibmvfc host struct 511 * 512 * Return value: 513 * nothing 514 **/ 515static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 516{ 517 if (vhost->action == IBMVFC_HOST_ACTION_NONE) { 518 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 519 scsi_block_requests(vhost->host); 520 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 521 } 522 } else 523 vhost->reinit = 1; 524 525 wake_up(&vhost->work_wait_q); 526} 527 528/** 529 * ibmvfc_link_down - Handle a link down event from the adapter 530 * @vhost: ibmvfc host struct 531 * @state: ibmvfc host state to enter 532 * 533 **/ 534static void ibmvfc_link_down(struct ibmvfc_host *vhost, 535 enum ibmvfc_host_state state) 536{ 537 struct ibmvfc_target *tgt; 538 539 ENTER; 540 scsi_block_requests(vhost->host); 541 list_for_each_entry(tgt, &vhost->targets, queue) 542 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 543 ibmvfc_set_host_state(vhost, state); 544 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 545 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 546 wake_up(&vhost->work_wait_q); 547 LEAVE; 548} 549 550/** 551 * ibmvfc_init_host - Start host initialization 552 * @vhost: ibmvfc host struct 553 * @relogin: is this a re-login? 554 * 555 * Return value: 556 * nothing 557 **/ 558static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin) 559{ 560 struct ibmvfc_target *tgt; 561 562 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 563 if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) { 564 dev_err(vhost->dev, 565 "Host initialization retries exceeded. Taking adapter offline\n"); 566 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 567 return; 568 } 569 } 570 571 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 572 if (!relogin) { 573 memset(vhost->async_crq.msgs, 0, PAGE_SIZE); 574 vhost->async_crq.cur = 0; 575 } 576 577 list_for_each_entry(tgt, &vhost->targets, queue) 578 tgt->need_login = 1; 579 scsi_block_requests(vhost->host); 580 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 581 vhost->job_step = ibmvfc_npiv_login; 582 wake_up(&vhost->work_wait_q); 583 } 584} 585 586/** 587 * ibmvfc_send_crq - Send a CRQ 588 * @vhost: ibmvfc host struct 589 * @word1: the first 64 bits of the data 590 * @word2: the second 64 bits of the data 591 * 592 * Return value: 593 * 0 on success / other on failure 594 **/ 595static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 596{ 597 struct vio_dev *vdev = to_vio_dev(vhost->dev); 598 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 599} 600 601/** 602 * ibmvfc_send_crq_init - Send a CRQ init message 603 * @vhost: ibmvfc host struct 604 * 605 * Return value: 606 * 0 on success / other on failure 607 **/ 608static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 609{ 610 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 611 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 612} 613 614/** 615 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 616 * @vhost: ibmvfc host struct 617 * 618 * Return value: 619 * 0 on success / other on failure 620 **/ 621static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 622{ 623 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 624 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 625} 626 627/** 628 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 629 * @vhost: ibmvfc host struct 630 * 631 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 632 * the crq with the hypervisor. 633 **/ 634static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 635{ 636 long rc; 637 struct vio_dev *vdev = to_vio_dev(vhost->dev); 638 struct ibmvfc_crq_queue *crq = &vhost->crq; 639 640 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 641 free_irq(vdev->irq, vhost); 642 do { 643 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 644 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 645 646 vhost->state = IBMVFC_NO_CRQ; 647 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 648 free_page((unsigned long)crq->msgs); 649} 650 651/** 652 * ibmvfc_reenable_crq_queue - reenables the CRQ 653 * @vhost: ibmvfc host struct 654 * 655 * Return value: 656 * 0 on success / other on failure 657 **/ 658static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 659{ 660 int rc; 661 struct vio_dev *vdev = to_vio_dev(vhost->dev); 662 663 /* Re-enable the CRQ */ 664 do { 665 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 666 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 667 668 if (rc) 669 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 670 671 return rc; 672} 673 674/** 675 * ibmvfc_reset_crq - resets a crq after a failure 676 * @vhost: ibmvfc host struct 677 * 678 * Return value: 679 * 0 on success / other on failure 680 **/ 681static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 682{ 683 int rc; 684 struct vio_dev *vdev = to_vio_dev(vhost->dev); 685 struct ibmvfc_crq_queue *crq = &vhost->crq; 686 687 /* Close the CRQ */ 688 do { 689 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 690 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 691 692 vhost->state = IBMVFC_NO_CRQ; 693 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 694 695 /* Clean out the queue */ 696 memset(crq->msgs, 0, PAGE_SIZE); 697 crq->cur = 0; 698 699 /* And re-open it again */ 700 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 701 crq->msg_token, PAGE_SIZE); 702 703 if (rc == H_CLOSED) 704 /* Adapter is good, but other end is not ready */ 705 dev_warn(vhost->dev, "Partner adapter not ready\n"); 706 else if (rc != 0) 707 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 708 709 return rc; 710} 711 712/** 713 * ibmvfc_valid_event - Determines if event is valid. 714 * @pool: event_pool that contains the event 715 * @evt: ibmvfc event to be checked for validity 716 * 717 * Return value: 718 * 1 if event is valid / 0 if event is not valid 719 **/ 720static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 721 struct ibmvfc_event *evt) 722{ 723 int index = evt - pool->events; 724 if (index < 0 || index >= pool->size) /* outside of bounds */ 725 return 0; 726 if (evt != pool->events + index) /* unaligned */ 727 return 0; 728 return 1; 729} 730 731/** 732 * ibmvfc_free_event - Free the specified event 733 * @evt: ibmvfc_event to be freed 734 * 735 **/ 736static void ibmvfc_free_event(struct ibmvfc_event *evt) 737{ 738 struct ibmvfc_host *vhost = evt->vhost; 739 struct ibmvfc_event_pool *pool = &vhost->pool; 740 741 BUG_ON(!ibmvfc_valid_event(pool, evt)); 742 BUG_ON(atomic_inc_return(&evt->free) != 1); 743 list_add_tail(&evt->queue, &vhost->free); 744} 745 746/** 747 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 748 * @evt: ibmvfc event struct 749 * 750 * This function does not setup any error status, that must be done 751 * before this function gets called. 752 **/ 753static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 754{ 755 struct scsi_cmnd *cmnd = evt->cmnd; 756 757 if (cmnd) { 758 scsi_dma_unmap(cmnd); 759 cmnd->scsi_done(cmnd); 760 } 761 762 if (evt->eh_comp) 763 complete(evt->eh_comp); 764 765 ibmvfc_free_event(evt); 766} 767 768/** 769 * ibmvfc_fail_request - Fail request with specified error code 770 * @evt: ibmvfc event struct 771 * @error_code: error code to fail request with 772 * 773 * Return value: 774 * none 775 **/ 776static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 777{ 778 if (evt->cmnd) { 779 evt->cmnd->result = (error_code << 16); 780 evt->done = ibmvfc_scsi_eh_done; 781 } else 782 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; 783 784 list_del(&evt->queue); 785 del_timer(&evt->timer); 786 ibmvfc_trc_end(evt); 787 evt->done(evt); 788} 789 790/** 791 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 792 * @vhost: ibmvfc host struct 793 * @error_code: error code to fail requests with 794 * 795 * Return value: 796 * none 797 **/ 798static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 799{ 800 struct ibmvfc_event *evt, *pos; 801 802 ibmvfc_dbg(vhost, "Purging all requests\n"); 803 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 804 ibmvfc_fail_request(evt, error_code); 805} 806 807/** 808 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 809 * @vhost: struct ibmvfc host to reset 810 **/ 811static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 812{ 813 int rc; 814 815 scsi_block_requests(vhost->host); 816 ibmvfc_purge_requests(vhost, DID_ERROR); 817 if ((rc = ibmvfc_reset_crq(vhost)) || 818 (rc = ibmvfc_send_crq_init(vhost)) || 819 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 820 dev_err(vhost->dev, "Error after reset rc=%d\n", rc); 821 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 822 } else 823 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 824} 825 826/** 827 * ibmvfc_reset_host - Reset the connection to the server 828 * @vhost: struct ibmvfc host to reset 829 **/ 830static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 831{ 832 unsigned long flags; 833 834 spin_lock_irqsave(vhost->host->host_lock, flags); 835 __ibmvfc_reset_host(vhost); 836 spin_unlock_irqrestore(vhost->host->host_lock, flags); 837} 838 839/** 840 * ibmvfc_retry_host_init - Retry host initialization if allowed 841 * @vhost: ibmvfc host struct 842 * 843 **/ 844static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 845{ 846 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 847 if (++vhost->init_retries > IBMVFC_MAX_INIT_RETRIES) { 848 dev_err(vhost->dev, 849 "Host initialization retries exceeded. Taking adapter offline\n"); 850 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 851 } else if (vhost->init_retries == IBMVFC_MAX_INIT_RETRIES) 852 __ibmvfc_reset_host(vhost); 853 else 854 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 855 } 856 857 wake_up(&vhost->work_wait_q); 858} 859 860/** 861 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 862 * @starget: scsi target struct 863 * 864 * Return value: 865 * ibmvfc_target struct / NULL if not found 866 **/ 867static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 868{ 869 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 870 struct ibmvfc_host *vhost = shost_priv(shost); 871 struct ibmvfc_target *tgt; 872 873 list_for_each_entry(tgt, &vhost->targets, queue) 874 if (tgt->target_id == starget->id) { 875 kref_get(&tgt->kref); 876 return tgt; 877 } 878 return NULL; 879} 880 881/** 882 * ibmvfc_get_target - Find the specified scsi_target 883 * @starget: scsi target struct 884 * 885 * Return value: 886 * ibmvfc_target struct / NULL if not found 887 **/ 888static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 889{ 890 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 891 struct ibmvfc_target *tgt; 892 unsigned long flags; 893 894 spin_lock_irqsave(shost->host_lock, flags); 895 tgt = __ibmvfc_get_target(starget); 896 spin_unlock_irqrestore(shost->host_lock, flags); 897 return tgt; 898} 899 900/** 901 * ibmvfc_get_host_speed - Get host port speed 902 * @shost: scsi host struct 903 * 904 * Return value: 905 * none 906 **/ 907static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 908{ 909 struct ibmvfc_host *vhost = shost_priv(shost); 910 unsigned long flags; 911 912 spin_lock_irqsave(shost->host_lock, flags); 913 if (vhost->state == IBMVFC_ACTIVE) { 914 switch (vhost->login_buf->resp.link_speed / 100) { 915 case 1: 916 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 917 break; 918 case 2: 919 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 920 break; 921 case 4: 922 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 923 break; 924 case 8: 925 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 926 break; 927 case 10: 928 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 929 break; 930 case 16: 931 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 932 break; 933 default: 934 ibmvfc_log(vhost, 3, "Unknown port speed: %ld Gbit\n", 935 vhost->login_buf->resp.link_speed / 100); 936 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 937 break; 938 } 939 } else 940 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 941 spin_unlock_irqrestore(shost->host_lock, flags); 942} 943 944/** 945 * ibmvfc_get_host_port_state - Get host port state 946 * @shost: scsi host struct 947 * 948 * Return value: 949 * none 950 **/ 951static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 952{ 953 struct ibmvfc_host *vhost = shost_priv(shost); 954 unsigned long flags; 955 956 spin_lock_irqsave(shost->host_lock, flags); 957 switch (vhost->state) { 958 case IBMVFC_INITIALIZING: 959 case IBMVFC_ACTIVE: 960 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 961 break; 962 case IBMVFC_LINK_DOWN: 963 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 964 break; 965 case IBMVFC_LINK_DEAD: 966 case IBMVFC_HOST_OFFLINE: 967 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 968 break; 969 case IBMVFC_HALTED: 970 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 971 break; 972 case IBMVFC_NO_CRQ: 973 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 974 break; 975 default: 976 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 977 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 978 break; 979 } 980 spin_unlock_irqrestore(shost->host_lock, flags); 981} 982 983/** 984 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 985 * @rport: rport struct 986 * @timeout: timeout value 987 * 988 * Return value: 989 * none 990 **/ 991static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 992{ 993 if (timeout) 994 rport->dev_loss_tmo = timeout; 995 else 996 rport->dev_loss_tmo = 1; 997} 998 999/** 1000 * ibmvfc_release_tgt - Free memory allocated for a target 1001 * @kref: kref struct 1002 * 1003 **/ 1004static void ibmvfc_release_tgt(struct kref *kref) 1005{ 1006 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1007 kfree(tgt); 1008} 1009 1010/** 1011 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1012 * @starget: scsi target struct 1013 * 1014 * Return value: 1015 * none 1016 **/ 1017static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1018{ 1019 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1020 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1021 if (tgt) 1022 kref_put(&tgt->kref, ibmvfc_release_tgt); 1023} 1024 1025/** 1026 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1027 * @starget: scsi target struct 1028 * 1029 * Return value: 1030 * none 1031 **/ 1032static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1033{ 1034 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1035 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1036 if (tgt) 1037 kref_put(&tgt->kref, ibmvfc_release_tgt); 1038} 1039 1040/** 1041 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1042 * @starget: scsi target struct 1043 * 1044 * Return value: 1045 * none 1046 **/ 1047static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1048{ 1049 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1050 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1051 if (tgt) 1052 kref_put(&tgt->kref, ibmvfc_release_tgt); 1053} 1054 1055/** 1056 * ibmvfc_wait_while_resetting - Wait while the host resets 1057 * @vhost: ibmvfc host struct 1058 * 1059 * Return value: 1060 * 0 on success / other on failure 1061 **/ 1062static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1063{ 1064 long timeout = wait_event_timeout(vhost->init_wait_q, 1065 ((vhost->state == IBMVFC_ACTIVE || 1066 vhost->state == IBMVFC_HOST_OFFLINE || 1067 vhost->state == IBMVFC_LINK_DEAD) && 1068 vhost->action == IBMVFC_HOST_ACTION_NONE), 1069 (init_timeout * HZ)); 1070 1071 return timeout ? 0 : -EIO; 1072} 1073 1074/** 1075 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1076 * @shost: scsi host struct 1077 * 1078 * Return value: 1079 * 0 on success / other on failure 1080 **/ 1081static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1082{ 1083 struct ibmvfc_host *vhost = shost_priv(shost); 1084 1085 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1086 ibmvfc_reset_host(vhost); 1087 return ibmvfc_wait_while_resetting(vhost); 1088} 1089 1090/** 1091 * ibmvfc_gather_partition_info - Gather info about the LPAR 1092 * 1093 * Return value: 1094 * none 1095 **/ 1096static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1097{ 1098 struct device_node *rootdn; 1099 const char *name; 1100 const unsigned int *num; 1101 1102 rootdn = of_find_node_by_path("/"); 1103 if (!rootdn) 1104 return; 1105 1106 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1107 if (name) 1108 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1109 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1110 if (num) 1111 vhost->partition_number = *num; 1112 of_node_put(rootdn); 1113} 1114 1115/** 1116 * ibmvfc_set_login_info - Setup info for NPIV login 1117 * @vhost: ibmvfc host struct 1118 * 1119 * Return value: 1120 * none 1121 **/ 1122static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1123{ 1124 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1125 struct device_node *of_node = vhost->dev->archdata.of_node; 1126 const char *location; 1127 1128 memset(login_info, 0, sizeof(*login_info)); 1129 1130 login_info->ostype = IBMVFC_OS_LINUX; 1131 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; 1132 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); 1133 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); 1134 login_info->partition_num = vhost->partition_number; 1135 login_info->vfc_frame_version = 1; 1136 login_info->fcp_version = 3; 1137 if (vhost->client_migrated) 1138 login_info->flags = IBMVFC_CLIENT_MIGRATED; 1139 1140 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1141 login_info->capabilities = IBMVFC_CAN_MIGRATE; 1142 login_info->async.va = vhost->async_crq.msg_token; 1143 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); 1144 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1145 strncpy(login_info->device_name, 1146 vhost->host->shost_gendev.bus_id, IBMVFC_MAX_NAME); 1147 1148 location = of_get_property(of_node, "ibm,loc-code", NULL); 1149 location = location ? location : vhost->dev->bus_id; 1150 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1151} 1152 1153/** 1154 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1155 * @vhost: ibmvfc host who owns the event pool 1156 * 1157 * Returns zero on success. 1158 **/ 1159static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1160{ 1161 int i; 1162 struct ibmvfc_event_pool *pool = &vhost->pool; 1163 1164 ENTER; 1165 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1166 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1167 if (!pool->events) 1168 return -ENOMEM; 1169 1170 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1171 pool->size * sizeof(*pool->iu_storage), 1172 &pool->iu_token, 0); 1173 1174 if (!pool->iu_storage) { 1175 kfree(pool->events); 1176 return -ENOMEM; 1177 } 1178 1179 for (i = 0; i < pool->size; ++i) { 1180 struct ibmvfc_event *evt = &pool->events[i]; 1181 atomic_set(&evt->free, 1); 1182 evt->crq.valid = 0x80; 1183 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); 1184 evt->xfer_iu = pool->iu_storage + i; 1185 evt->vhost = vhost; 1186 evt->ext_list = NULL; 1187 list_add_tail(&evt->queue, &vhost->free); 1188 } 1189 1190 LEAVE; 1191 return 0; 1192} 1193 1194/** 1195 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1196 * @vhost: ibmvfc host who owns the event pool 1197 * 1198 **/ 1199static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1200{ 1201 int i; 1202 struct ibmvfc_event_pool *pool = &vhost->pool; 1203 1204 ENTER; 1205 for (i = 0; i < pool->size; ++i) { 1206 list_del(&pool->events[i].queue); 1207 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1208 if (pool->events[i].ext_list) 1209 dma_pool_free(vhost->sg_pool, 1210 pool->events[i].ext_list, 1211 pool->events[i].ext_list_token); 1212 } 1213 1214 kfree(pool->events); 1215 dma_free_coherent(vhost->dev, 1216 pool->size * sizeof(*pool->iu_storage), 1217 pool->iu_storage, pool->iu_token); 1218 LEAVE; 1219} 1220 1221/** 1222 * ibmvfc_get_event - Gets the next free event in pool 1223 * @vhost: ibmvfc host struct 1224 * 1225 * Returns a free event from the pool. 1226 **/ 1227static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1228{ 1229 struct ibmvfc_event *evt; 1230 1231 BUG_ON(list_empty(&vhost->free)); 1232 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1233 atomic_set(&evt->free, 0); 1234 list_del(&evt->queue); 1235 return evt; 1236} 1237 1238/** 1239 * ibmvfc_init_event - Initialize fields in an event struct that are always 1240 * required. 1241 * @evt: The event 1242 * @done: Routine to call when the event is responded to 1243 * @format: SRP or MAD format 1244 **/ 1245static void ibmvfc_init_event(struct ibmvfc_event *evt, 1246 void (*done) (struct ibmvfc_event *), u8 format) 1247{ 1248 evt->cmnd = NULL; 1249 evt->sync_iu = NULL; 1250 evt->crq.format = format; 1251 evt->done = done; 1252 evt->eh_comp = NULL; 1253} 1254 1255/** 1256 * ibmvfc_map_sg_list - Initialize scatterlist 1257 * @scmd: scsi command struct 1258 * @nseg: number of scatterlist segments 1259 * @md: memory descriptor list to initialize 1260 **/ 1261static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1262 struct srp_direct_buf *md) 1263{ 1264 int i; 1265 struct scatterlist *sg; 1266 1267 scsi_for_each_sg(scmd, sg, nseg, i) { 1268 md[i].va = sg_dma_address(sg); 1269 md[i].len = sg_dma_len(sg); 1270 md[i].key = 0; 1271 } 1272} 1273 1274/** 1275 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1276 * @scmd: Scsi_Cmnd with the scatterlist 1277 * @evt: ibmvfc event struct 1278 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1279 * @dev: device for which to map dma memory 1280 * 1281 * Returns: 1282 * 0 on success / non-zero on failure 1283 **/ 1284static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1285 struct ibmvfc_event *evt, 1286 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1287{ 1288 1289 int sg_mapped; 1290 struct srp_direct_buf *data = &vfc_cmd->ioba; 1291 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1292 1293 sg_mapped = scsi_dma_map(scmd); 1294 if (!sg_mapped) { 1295 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; 1296 return 0; 1297 } else if (unlikely(sg_mapped < 0)) { 1298 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1299 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1300 return sg_mapped; 1301 } 1302 1303 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1304 vfc_cmd->flags |= IBMVFC_WRITE; 1305 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1306 } else { 1307 vfc_cmd->flags |= IBMVFC_READ; 1308 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1309 } 1310 1311 if (sg_mapped == 1) { 1312 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1313 return 0; 1314 } 1315 1316 vfc_cmd->flags |= IBMVFC_SCATTERLIST; 1317 1318 if (!evt->ext_list) { 1319 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1320 &evt->ext_list_token); 1321 1322 if (!evt->ext_list) { 1323 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1324 return -ENOMEM; 1325 } 1326 } 1327 1328 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1329 1330 data->va = evt->ext_list_token; 1331 data->len = sg_mapped * sizeof(struct srp_direct_buf); 1332 data->key = 0; 1333 return 0; 1334} 1335 1336/** 1337 * ibmvfc_timeout - Internal command timeout handler 1338 * @evt: struct ibmvfc_event that timed out 1339 * 1340 * Called when an internally generated command times out 1341 **/ 1342static void ibmvfc_timeout(struct ibmvfc_event *evt) 1343{ 1344 struct ibmvfc_host *vhost = evt->vhost; 1345 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1346 ibmvfc_reset_host(vhost); 1347} 1348 1349/** 1350 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1351 * @evt: event to be sent 1352 * @vhost: ibmvfc host struct 1353 * @timeout: timeout in seconds - 0 means do not time command 1354 * 1355 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1356 **/ 1357static int ibmvfc_send_event(struct ibmvfc_event *evt, 1358 struct ibmvfc_host *vhost, unsigned long timeout) 1359{ 1360 u64 *crq_as_u64 = (u64 *) &evt->crq; 1361 int rc; 1362 1363 /* Copy the IU into the transfer area */ 1364 *evt->xfer_iu = evt->iu; 1365 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1366 evt->xfer_iu->cmd.tag = (u64)evt; 1367 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1368 evt->xfer_iu->mad_common.tag = (u64)evt; 1369 else 1370 BUG(); 1371 1372 list_add_tail(&evt->queue, &vhost->sent); 1373 init_timer(&evt->timer); 1374 1375 if (timeout) { 1376 evt->timer.data = (unsigned long) evt; 1377 evt->timer.expires = jiffies + (timeout * HZ); 1378 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; 1379 add_timer(&evt->timer); 1380 } 1381 1382 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { 1383 list_del(&evt->queue); 1384 del_timer(&evt->timer); 1385 1386 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1387 * Firmware will send a CRQ with a transport event (0xFF) to 1388 * tell this client what has happened to the transport. This 1389 * will be handled in ibmvfc_handle_crq() 1390 */ 1391 if (rc == H_CLOSED) { 1392 if (printk_ratelimit()) 1393 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1394 if (evt->cmnd) 1395 scsi_dma_unmap(evt->cmnd); 1396 ibmvfc_free_event(evt); 1397 return SCSI_MLQUEUE_HOST_BUSY; 1398 } 1399 1400 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1401 if (evt->cmnd) { 1402 evt->cmnd->result = DID_ERROR << 16; 1403 evt->done = ibmvfc_scsi_eh_done; 1404 } else 1405 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; 1406 1407 evt->done(evt); 1408 } else 1409 ibmvfc_trc_start(evt); 1410 1411 return 0; 1412} 1413 1414/** 1415 * ibmvfc_log_error - Log an error for the failed command if appropriate 1416 * @evt: ibmvfc event to log 1417 * 1418 **/ 1419static void ibmvfc_log_error(struct ibmvfc_event *evt) 1420{ 1421 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1422 struct ibmvfc_host *vhost = evt->vhost; 1423 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1424 struct scsi_cmnd *cmnd = evt->cmnd; 1425 const char *err = unknown_error; 1426 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 1427 int logerr = 0; 1428 int rsp_code = 0; 1429 1430 if (index >= 0) { 1431 logerr = cmd_status[index].log; 1432 err = cmd_status[index].name; 1433 } 1434 1435 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1436 return; 1437 1438 if (rsp->flags & FCP_RSP_LEN_VALID) 1439 rsp_code = rsp->data.info.rsp_code; 1440 1441 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1442 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1443 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1444 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1445} 1446 1447/** 1448 * ibmvfc_scsi_done - Handle responses from commands 1449 * @evt: ibmvfc event to be handled 1450 * 1451 * Used as a callback when sending scsi cmds. 1452 **/ 1453static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1454{ 1455 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1456 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1457 struct scsi_cmnd *cmnd = evt->cmnd; 1458 u32 rsp_len = 0; 1459 u32 sense_len = rsp->fcp_sense_len; 1460 1461 if (cmnd) { 1462 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) 1463 scsi_set_resid(cmnd, vfc_cmd->adapter_resid); 1464 else if (rsp->flags & FCP_RESID_UNDER) 1465 scsi_set_resid(cmnd, rsp->fcp_resid); 1466 else 1467 scsi_set_resid(cmnd, 0); 1468 1469 if (vfc_cmd->status) { 1470 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1471 1472 if (rsp->flags & FCP_RSP_LEN_VALID) 1473 rsp_len = rsp->fcp_rsp_len; 1474 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1475 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1476 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1477 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1478 1479 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1480 cmnd->result = (DID_ERROR << 16); 1481 1482 ibmvfc_log_error(evt); 1483 } 1484 1485 if (!cmnd->result && 1486 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1487 cmnd->result = (DID_ERROR << 16); 1488 1489 scsi_dma_unmap(cmnd); 1490 cmnd->scsi_done(cmnd); 1491 } 1492 1493 if (evt->eh_comp) 1494 complete(evt->eh_comp); 1495 1496 ibmvfc_free_event(evt); 1497} 1498 1499/** 1500 * ibmvfc_host_chkready - Check if the host can accept commands 1501 * @vhost: struct ibmvfc host 1502 * 1503 * Returns: 1504 * 1 if host can accept command / 0 if not 1505 **/ 1506static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1507{ 1508 int result = 0; 1509 1510 switch (vhost->state) { 1511 case IBMVFC_LINK_DEAD: 1512 case IBMVFC_HOST_OFFLINE: 1513 result = DID_NO_CONNECT << 16; 1514 break; 1515 case IBMVFC_NO_CRQ: 1516 case IBMVFC_INITIALIZING: 1517 case IBMVFC_HALTED: 1518 case IBMVFC_LINK_DOWN: 1519 result = DID_REQUEUE << 16; 1520 break; 1521 case IBMVFC_ACTIVE: 1522 result = 0; 1523 break; 1524 }; 1525 1526 return result; 1527} 1528 1529/** 1530 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1531 * @cmnd: struct scsi_cmnd to be executed 1532 * @done: Callback function to be called when cmnd is completed 1533 * 1534 * Returns: 1535 * 0 on success / other on failure 1536 **/ 1537static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, 1538 void (*done) (struct scsi_cmnd *)) 1539{ 1540 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1541 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1542 struct ibmvfc_cmd *vfc_cmd; 1543 struct ibmvfc_event *evt; 1544 u8 tag[2]; 1545 int rc; 1546 1547 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1548 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1549 cmnd->result = rc; 1550 done(cmnd); 1551 return 0; 1552 } 1553 1554 cmnd->result = (DID_OK << 16); 1555 evt = ibmvfc_get_event(vhost); 1556 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1557 evt->cmnd = cmnd; 1558 cmnd->scsi_done = done; 1559 vfc_cmd = &evt->iu.cmd; 1560 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1561 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1562 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); 1563 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; 1564 vfc_cmd->payload_len = sizeof(vfc_cmd->iu); 1565 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); 1566 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; 1567 vfc_cmd->tgt_scsi_id = rport->port_id; 1568 if ((rport->supported_classes & FC_COS_CLASS3) && 1569 (fc_host_supported_classes(vhost->host) & FC_COS_CLASS3)) 1570 vfc_cmd->flags = IBMVFC_CLASS_3_ERR; 1571 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); 1572 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1573 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1574 1575 if (scsi_populate_tag_msg(cmnd, tag)) { 1576 vfc_cmd->task_tag = tag[1]; 1577 switch (tag[0]) { 1578 case MSG_SIMPLE_TAG: 1579 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1580 break; 1581 case MSG_HEAD_TAG: 1582 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; 1583 break; 1584 case MSG_ORDERED_TAG: 1585 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; 1586 break; 1587 }; 1588 } 1589 1590 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1591 return ibmvfc_send_event(evt, vhost, 0); 1592 1593 ibmvfc_free_event(evt); 1594 if (rc == -ENOMEM) 1595 return SCSI_MLQUEUE_HOST_BUSY; 1596 1597 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1598 scmd_printk(KERN_ERR, cmnd, 1599 "Failed to map DMA buffer for command. rc=%d\n", rc); 1600 1601 cmnd->result = DID_ERROR << 16; 1602 done(cmnd); 1603 return 0; 1604} 1605 1606/** 1607 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1608 * @evt: ibmvfc event struct 1609 * 1610 **/ 1611static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1612{ 1613 /* copy the response back */ 1614 if (evt->sync_iu) 1615 *evt->sync_iu = *evt->xfer_iu; 1616 1617 complete(&evt->comp); 1618} 1619 1620/** 1621 * ibmvfc_reset_device - Reset the device with the specified reset type 1622 * @sdev: scsi device to reset 1623 * @type: reset type 1624 * @desc: reset type description for log messages 1625 * 1626 * Returns: 1627 * 0 on success / other on failure 1628 **/ 1629static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1630{ 1631 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1632 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1633 struct ibmvfc_cmd *tmf; 1634 struct ibmvfc_event *evt; 1635 union ibmvfc_iu rsp_iu; 1636 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1637 int rsp_rc = -EBUSY; 1638 unsigned long flags; 1639 int rsp_code = 0; 1640 1641 spin_lock_irqsave(vhost->host->host_lock, flags); 1642 if (vhost->state == IBMVFC_ACTIVE) { 1643 evt = ibmvfc_get_event(vhost); 1644 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1645 1646 tmf = &evt->iu.cmd; 1647 memset(tmf, 0, sizeof(*tmf)); 1648 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1649 tmf->resp.len = sizeof(tmf->rsp); 1650 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1651 tmf->payload_len = sizeof(tmf->iu); 1652 tmf->resp_len = sizeof(tmf->rsp); 1653 tmf->cancel_key = (unsigned long)sdev->hostdata; 1654 tmf->tgt_scsi_id = rport->port_id; 1655 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1656 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1657 tmf->iu.tmf_flags = type; 1658 evt->sync_iu = &rsp_iu; 1659 1660 init_completion(&evt->comp); 1661 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1662 } 1663 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1664 1665 if (rsp_rc != 0) { 1666 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 1667 desc, rsp_rc); 1668 return -EIO; 1669 } 1670 1671 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 1672 wait_for_completion(&evt->comp); 1673 1674 if (rsp_iu.cmd.status) { 1675 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 1676 rsp_code = fc_rsp->data.info.rsp_code; 1677 1678 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 1679 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 1680 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 1681 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 1682 fc_rsp->scsi_status); 1683 rsp_rc = -EIO; 1684 } else 1685 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 1686 1687 spin_lock_irqsave(vhost->host->host_lock, flags); 1688 ibmvfc_free_event(evt); 1689 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1690 return rsp_rc; 1691} 1692 1693/** 1694 * ibmvfc_abort_task_set - Abort outstanding commands to the device 1695 * @sdev: scsi device to abort commands 1696 * 1697 * This sends an Abort Task Set to the VIOS for the specified device. This does 1698 * NOT send any cancel to the VIOS. That must be done separately. 1699 * 1700 * Returns: 1701 * 0 on success / other on failure 1702 **/ 1703static int ibmvfc_abort_task_set(struct scsi_device *sdev) 1704{ 1705 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1706 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1707 struct ibmvfc_cmd *tmf; 1708 struct ibmvfc_event *evt, *found_evt; 1709 union ibmvfc_iu rsp_iu; 1710 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1711 int rsp_rc = -EBUSY; 1712 unsigned long flags; 1713 int rsp_code = 0; 1714 1715 spin_lock_irqsave(vhost->host->host_lock, flags); 1716 found_evt = NULL; 1717 list_for_each_entry(evt, &vhost->sent, queue) { 1718 if (evt->cmnd && evt->cmnd->device == sdev) { 1719 found_evt = evt; 1720 break; 1721 } 1722 } 1723 1724 if (!found_evt) { 1725 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1726 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 1727 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1728 return 0; 1729 } 1730 1731 if (vhost->state == IBMVFC_ACTIVE) { 1732 evt = ibmvfc_get_event(vhost); 1733 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1734 1735 tmf = &evt->iu.cmd; 1736 memset(tmf, 0, sizeof(*tmf)); 1737 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1738 tmf->resp.len = sizeof(tmf->rsp); 1739 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1740 tmf->payload_len = sizeof(tmf->iu); 1741 tmf->resp_len = sizeof(tmf->rsp); 1742 tmf->cancel_key = (unsigned long)sdev->hostdata; 1743 tmf->tgt_scsi_id = rport->port_id; 1744 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1745 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1746 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 1747 evt->sync_iu = &rsp_iu; 1748 1749 init_completion(&evt->comp); 1750 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1751 } 1752 1753 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1754 1755 if (rsp_rc != 0) { 1756 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 1757 return -EIO; 1758 } 1759 1760 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 1761 wait_for_completion(&evt->comp); 1762 1763 if (rsp_iu.cmd.status) { 1764 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 1765 rsp_code = fc_rsp->data.info.rsp_code; 1766 1767 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 1768 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 1769 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 1770 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 1771 fc_rsp->scsi_status); 1772 rsp_rc = -EIO; 1773 } else 1774 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 1775 1776 spin_lock_irqsave(vhost->host->host_lock, flags); 1777 ibmvfc_free_event(evt); 1778 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1779 return rsp_rc; 1780} 1781 1782/** 1783 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 1784 * @sdev: scsi device to cancel commands 1785 * @type: type of error recovery being performed 1786 * 1787 * This sends a cancel to the VIOS for the specified device. This does 1788 * NOT send any abort to the actual device. That must be done separately. 1789 * 1790 * Returns: 1791 * 0 on success / other on failure 1792 **/ 1793static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 1794{ 1795 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1796 struct scsi_target *starget = scsi_target(sdev); 1797 struct fc_rport *rport = starget_to_rport(starget); 1798 struct ibmvfc_tmf *tmf; 1799 struct ibmvfc_event *evt, *found_evt; 1800 union ibmvfc_iu rsp; 1801 int rsp_rc = -EBUSY; 1802 unsigned long flags; 1803 u16 status; 1804 1805 ENTER; 1806 spin_lock_irqsave(vhost->host->host_lock, flags); 1807 found_evt = NULL; 1808 list_for_each_entry(evt, &vhost->sent, queue) { 1809 if (evt->cmnd && evt->cmnd->device == sdev) { 1810 found_evt = evt; 1811 break; 1812 } 1813 } 1814 1815 if (!found_evt) { 1816 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1817 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 1818 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1819 return 0; 1820 } 1821 1822 if (vhost->state == IBMVFC_ACTIVE) { 1823 evt = ibmvfc_get_event(vhost); 1824 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1825 1826 tmf = &evt->iu.tmf; 1827 memset(tmf, 0, sizeof(*tmf)); 1828 tmf->common.version = 1; 1829 tmf->common.opcode = IBMVFC_TMF_MAD; 1830 tmf->common.length = sizeof(*tmf); 1831 tmf->scsi_id = rport->port_id; 1832 int_to_scsilun(sdev->lun, &tmf->lun); 1833 tmf->flags = (type | IBMVFC_TMF_LUA_VALID); 1834 tmf->cancel_key = (unsigned long)sdev->hostdata; 1835 tmf->my_cancel_key = (unsigned long)starget->hostdata; 1836 1837 evt->sync_iu = &rsp; 1838 init_completion(&evt->comp); 1839 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1840 } 1841 1842 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1843 1844 if (rsp_rc != 0) { 1845 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 1846 return -EIO; 1847 } 1848 1849 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 1850 1851 wait_for_completion(&evt->comp); 1852 status = rsp.mad_common.status; 1853 spin_lock_irqsave(vhost->host->host_lock, flags); 1854 ibmvfc_free_event(evt); 1855 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1856 1857 if (status != IBMVFC_MAD_SUCCESS) { 1858 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 1859 return -EIO; 1860 } 1861 1862 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 1863 return 0; 1864} 1865 1866/** 1867 * ibmvfc_match_target - Match function for specified target 1868 * @evt: ibmvfc event struct 1869 * @device: device to match (starget) 1870 * 1871 * Returns: 1872 * 1 if event matches starget / 0 if event does not match starget 1873 **/ 1874static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 1875{ 1876 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 1877 return 1; 1878 return 0; 1879} 1880 1881/** 1882 * ibmvfc_match_lun - Match function for specified LUN 1883 * @evt: ibmvfc event struct 1884 * @device: device to match (sdev) 1885 * 1886 * Returns: 1887 * 1 if event matches sdev / 0 if event does not match sdev 1888 **/ 1889static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 1890{ 1891 if (evt->cmnd && evt->cmnd->device == device) 1892 return 1; 1893 return 0; 1894} 1895 1896/** 1897 * ibmvfc_wait_for_ops - Wait for ops to complete 1898 * @vhost: ibmvfc host struct 1899 * @device: device to match (starget or sdev) 1900 * @match: match function 1901 * 1902 * Returns: 1903 * SUCCESS / FAILED 1904 **/ 1905static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 1906 int (*match) (struct ibmvfc_event *, void *)) 1907{ 1908 struct ibmvfc_event *evt; 1909 DECLARE_COMPLETION_ONSTACK(comp); 1910 int wait; 1911 unsigned long flags; 1912 signed long timeout = init_timeout * HZ; 1913 1914 ENTER; 1915 do { 1916 wait = 0; 1917 spin_lock_irqsave(vhost->host->host_lock, flags); 1918 list_for_each_entry(evt, &vhost->sent, queue) { 1919 if (match(evt, device)) { 1920 evt->eh_comp = ∁ 1921 wait++; 1922 } 1923 } 1924 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1925 1926 if (wait) { 1927 timeout = wait_for_completion_timeout(&comp, timeout); 1928 1929 if (!timeout) { 1930 wait = 0; 1931 spin_lock_irqsave(vhost->host->host_lock, flags); 1932 list_for_each_entry(evt, &vhost->sent, queue) { 1933 if (match(evt, device)) { 1934 evt->eh_comp = NULL; 1935 wait++; 1936 } 1937 } 1938 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1939 if (wait) 1940 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 1941 LEAVE; 1942 return wait ? FAILED : SUCCESS; 1943 } 1944 } 1945 } while (wait); 1946 1947 LEAVE; 1948 return SUCCESS; 1949} 1950 1951/** 1952 * ibmvfc_eh_abort_handler - Abort a command 1953 * @cmd: scsi command to abort 1954 * 1955 * Returns: 1956 * SUCCESS / FAILED 1957 **/ 1958static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 1959{ 1960 struct scsi_device *sdev = cmd->device; 1961 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1962 int cancel_rc, abort_rc; 1963 int rc = FAILED; 1964 1965 ENTER; 1966 ibmvfc_wait_while_resetting(vhost); 1967 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 1968 abort_rc = ibmvfc_abort_task_set(sdev); 1969 1970 if (!cancel_rc && !abort_rc) 1971 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 1972 1973 LEAVE; 1974 return rc; 1975} 1976 1977/** 1978 * ibmvfc_eh_device_reset_handler - Reset a single LUN 1979 * @cmd: scsi command struct 1980 * 1981 * Returns: 1982 * SUCCESS / FAILED 1983 **/ 1984static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 1985{ 1986 struct scsi_device *sdev = cmd->device; 1987 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1988 int cancel_rc, reset_rc; 1989 int rc = FAILED; 1990 1991 ENTER; 1992 ibmvfc_wait_while_resetting(vhost); 1993 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 1994 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 1995 1996 if (!cancel_rc && !reset_rc) 1997 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 1998 1999 LEAVE; 2000 return rc; 2001} 2002 2003/** 2004 * ibmvfc_dev_cancel_all - Device iterated cancel all function 2005 * @sdev: scsi device struct 2006 * @data: return code 2007 * 2008 **/ 2009static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data) 2010{ 2011 unsigned long *rc = data; 2012 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2013} 2014 2015/** 2016 * ibmvfc_dev_abort_all - Device iterated abort task set function 2017 * @sdev: scsi device struct 2018 * @data: return code 2019 * 2020 **/ 2021static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) 2022{ 2023 unsigned long *rc = data; 2024 *rc |= ibmvfc_abort_task_set(sdev); 2025} 2026 2027/** 2028 * ibmvfc_eh_target_reset_handler - Reset the target 2029 * @cmd: scsi command struct 2030 * 2031 * Returns: 2032 * SUCCESS / FAILED 2033 **/ 2034static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2035{ 2036 struct scsi_device *sdev = cmd->device; 2037 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2038 struct scsi_target *starget = scsi_target(sdev); 2039 int reset_rc; 2040 int rc = FAILED; 2041 unsigned long cancel_rc = 0; 2042 2043 ENTER; 2044 ibmvfc_wait_while_resetting(vhost); 2045 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); 2046 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2047 2048 if (!cancel_rc && !reset_rc) 2049 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2050 2051 LEAVE; 2052 return rc; 2053} 2054 2055/** 2056 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2057 * @cmd: struct scsi_cmnd having problems 2058 * 2059 **/ 2060static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2061{ 2062 int rc; 2063 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2064 2065 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2066 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2067 return rc ? FAILED : SUCCESS; 2068} 2069 2070/** 2071 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2072 * @rport: rport struct 2073 * 2074 * Return value: 2075 * none 2076 **/ 2077static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2078{ 2079 struct scsi_target *starget = to_scsi_target(&rport->dev); 2080 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2081 struct ibmvfc_host *vhost = shost_priv(shost); 2082 unsigned long cancel_rc = 0; 2083 unsigned long abort_rc = 0; 2084 int rc = FAILED; 2085 2086 ENTER; 2087 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); 2088 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); 2089 2090 if (!cancel_rc && !abort_rc) 2091 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2092 2093 if (rc == FAILED) 2094 ibmvfc_issue_fc_host_lip(shost); 2095 LEAVE; 2096} 2097 2098static const struct { 2099 enum ibmvfc_async_event ae; 2100 const char *desc; 2101} ae_desc [] = { 2102 { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, 2103 { IBMVFC_AE_ELS_LOGO, "LOGO" }, 2104 { IBMVFC_AE_ELS_PRLO, "PRLO" }, 2105 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, 2106 { IBMVFC_AE_SCN_GROUP, "Group SCN" }, 2107 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, 2108 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, 2109 { IBMVFC_AE_LINK_UP, "Link Up" }, 2110 { IBMVFC_AE_LINK_DOWN, "Link Down" }, 2111 { IBMVFC_AE_LINK_DEAD, "Link Dead" }, 2112 { IBMVFC_AE_HALT, "Halt" }, 2113 { IBMVFC_AE_RESUME, "Resume" }, 2114 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, 2115}; 2116 2117static const char *unknown_ae = "Unknown async"; 2118 2119/** 2120 * ibmvfc_get_ae_desc - Get text description for async event 2121 * @ae: async event 2122 * 2123 **/ 2124static const char *ibmvfc_get_ae_desc(u64 ae) 2125{ 2126 int i; 2127 2128 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2129 if (ae_desc[i].ae == ae) 2130 return ae_desc[i].desc; 2131 2132 return unknown_ae; 2133} 2134 2135/** 2136 * ibmvfc_handle_async - Handle an async event from the adapter 2137 * @crq: crq to process 2138 * @vhost: ibmvfc host struct 2139 * 2140 **/ 2141static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2142 struct ibmvfc_host *vhost) 2143{ 2144 const char *desc = ibmvfc_get_ae_desc(crq->event); 2145 2146 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %lx, wwpn: %lx," 2147 " node_name: %lx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name); 2148 2149 switch (crq->event) { 2150 case IBMVFC_AE_LINK_UP: 2151 case IBMVFC_AE_RESUME: 2152 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2153 ibmvfc_init_host(vhost, 1); 2154 break; 2155 case IBMVFC_AE_SCN_FABRIC: 2156 vhost->events_to_log |= IBMVFC_AE_RSCN; 2157 ibmvfc_init_host(vhost, 1); 2158 break; 2159 case IBMVFC_AE_SCN_NPORT: 2160 case IBMVFC_AE_SCN_GROUP: 2161 case IBMVFC_AE_SCN_DOMAIN: 2162 vhost->events_to_log |= IBMVFC_AE_RSCN; 2163 case IBMVFC_AE_ELS_LOGO: 2164 case IBMVFC_AE_ELS_PRLO: 2165 case IBMVFC_AE_ELS_PLOGI: 2166 ibmvfc_reinit_host(vhost); 2167 break; 2168 case IBMVFC_AE_LINK_DOWN: 2169 case IBMVFC_AE_ADAPTER_FAILED: 2170 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2171 break; 2172 case IBMVFC_AE_LINK_DEAD: 2173 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2174 break; 2175 case IBMVFC_AE_HALT: 2176 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2177 break; 2178 default: 2179 dev_err(vhost->dev, "Unknown async event received: %ld\n", crq->event); 2180 break; 2181 }; 2182} 2183 2184/** 2185 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2186 * @crq: Command/Response queue 2187 * @vhost: ibmvfc host struct 2188 * 2189 **/ 2190static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2191{ 2192 long rc; 2193 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; 2194 2195 switch (crq->valid) { 2196 case IBMVFC_CRQ_INIT_RSP: 2197 switch (crq->format) { 2198 case IBMVFC_CRQ_INIT: 2199 dev_info(vhost->dev, "Partner initialized\n"); 2200 /* Send back a response */ 2201 rc = ibmvfc_send_crq_init_complete(vhost); 2202 if (rc == 0) 2203 ibmvfc_init_host(vhost, 0); 2204 else 2205 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2206 break; 2207 case IBMVFC_CRQ_INIT_COMPLETE: 2208 dev_info(vhost->dev, "Partner initialization complete\n"); 2209 ibmvfc_init_host(vhost, 0); 2210 break; 2211 default: 2212 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2213 } 2214 return; 2215 case IBMVFC_CRQ_XPORT_EVENT: 2216 vhost->state = IBMVFC_NO_CRQ; 2217 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2218 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2219 /* We need to re-setup the interpartition connection */ 2220 dev_info(vhost->dev, "Re-enabling adapter\n"); 2221 vhost->client_migrated = 1; 2222 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2223 if ((rc = ibmvfc_reenable_crq_queue(vhost)) || 2224 (rc = ibmvfc_send_crq_init(vhost))) { 2225 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2226 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); 2227 } else 2228 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2229 } else { 2230 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2231 2232 ibmvfc_purge_requests(vhost, DID_ERROR); 2233 if ((rc = ibmvfc_reset_crq(vhost)) || 2234 (rc = ibmvfc_send_crq_init(vhost))) { 2235 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2236 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); 2237 } else 2238 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2239 } 2240 return; 2241 case IBMVFC_CRQ_CMD_RSP: 2242 break; 2243 default: 2244 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2245 return; 2246 } 2247 2248 if (crq->format == IBMVFC_ASYNC_EVENT) 2249 return; 2250 2251 /* The only kind of payload CRQs we should get are responses to 2252 * things we send. Make sure this response is to something we 2253 * actually sent 2254 */ 2255 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2256 dev_err(vhost->dev, "Returned correlation_token 0x%08lx is invalid!\n", 2257 crq->ioba); 2258 return; 2259 } 2260 2261 if (unlikely(atomic_read(&evt->free))) { 2262 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08lx!\n", 2263 crq->ioba); 2264 return; 2265 } 2266 2267 del_timer(&evt->timer); 2268 list_del(&evt->queue); 2269 ibmvfc_trc_end(evt); 2270 evt->done(evt); 2271} 2272 2273/** 2274 * ibmvfc_scan_finished - Check if the device scan is done. 2275 * @shost: scsi host struct 2276 * @time: current elapsed time 2277 * 2278 * Returns: 2279 * 0 if scan is not done / 1 if scan is done 2280 **/ 2281static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2282{ 2283 unsigned long flags; 2284 struct ibmvfc_host *vhost = shost_priv(shost); 2285 int done = 0; 2286 2287 spin_lock_irqsave(shost->host_lock, flags); 2288 if (time >= (init_timeout * HZ)) { 2289 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2290 "continuing initialization\n", init_timeout); 2291 done = 1; 2292 } 2293 2294 if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE) 2295 done = 1; 2296 spin_unlock_irqrestore(shost->host_lock, flags); 2297 return done; 2298} 2299 2300/** 2301 * ibmvfc_slave_alloc - Setup the device's task set value 2302 * @sdev: struct scsi_device device to configure 2303 * 2304 * Set the device's task set value so that error handling works as 2305 * expected. 2306 * 2307 * Returns: 2308 * 0 on success / -ENXIO if device does not exist 2309 **/ 2310static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2311{ 2312 struct Scsi_Host *shost = sdev->host; 2313 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2314 struct ibmvfc_host *vhost = shost_priv(shost); 2315 unsigned long flags = 0; 2316 2317 if (!rport || fc_remote_port_chkready(rport)) 2318 return -ENXIO; 2319 2320 spin_lock_irqsave(shost->host_lock, flags); 2321 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2322 spin_unlock_irqrestore(shost->host_lock, flags); 2323 return 0; 2324} 2325 2326/** 2327 * ibmvfc_target_alloc - Setup the target's task set value 2328 * @starget: struct scsi_target 2329 * 2330 * Set the target's task set value so that error handling works as 2331 * expected. 2332 * 2333 * Returns: 2334 * 0 on success / -ENXIO if device does not exist 2335 **/ 2336static int ibmvfc_target_alloc(struct scsi_target *starget) 2337{ 2338 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2339 struct ibmvfc_host *vhost = shost_priv(shost); 2340 unsigned long flags = 0; 2341 2342 spin_lock_irqsave(shost->host_lock, flags); 2343 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2344 spin_unlock_irqrestore(shost->host_lock, flags); 2345 return 0; 2346} 2347 2348/** 2349 * ibmvfc_slave_configure - Configure the device 2350 * @sdev: struct scsi_device device to configure 2351 * 2352 * Enable allow_restart for a device if it is a disk. Adjust the 2353 * queue_depth here also. 2354 * 2355 * Returns: 2356 * 0 2357 **/ 2358static int ibmvfc_slave_configure(struct scsi_device *sdev) 2359{ 2360 struct Scsi_Host *shost = sdev->host; 2361 struct fc_rport *rport = starget_to_rport(sdev->sdev_target); 2362 unsigned long flags = 0; 2363 2364 spin_lock_irqsave(shost->host_lock, flags); 2365 if (sdev->type == TYPE_DISK) 2366 sdev->allow_restart = 1; 2367 2368 if (sdev->tagged_supported) { 2369 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 2370 scsi_activate_tcq(sdev, sdev->queue_depth); 2371 } else 2372 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2373 2374 rport->dev_loss_tmo = dev_loss_tmo; 2375 spin_unlock_irqrestore(shost->host_lock, flags); 2376 return 0; 2377} 2378 2379/** 2380 * ibmvfc_change_queue_depth - Change the device's queue depth 2381 * @sdev: scsi device struct 2382 * @qdepth: depth to set 2383 * 2384 * Return value: 2385 * actual depth set 2386 **/ 2387static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 2388{ 2389 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2390 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2391 2392 scsi_adjust_queue_depth(sdev, 0, qdepth); 2393 return sdev->queue_depth; 2394} 2395 2396/** 2397 * ibmvfc_change_queue_type - Change the device's queue type 2398 * @sdev: scsi device struct 2399 * @tag_type: type of tags to use 2400 * 2401 * Return value: 2402 * actual queue type set 2403 **/ 2404static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) 2405{ 2406 if (sdev->tagged_supported) { 2407 scsi_set_tag_type(sdev, tag_type); 2408 2409 if (tag_type) 2410 scsi_activate_tcq(sdev, sdev->queue_depth); 2411 else 2412 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2413 } else 2414 tag_type = 0; 2415 2416 return tag_type; 2417} 2418 2419static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2420 struct device_attribute *attr, char *buf) 2421{ 2422 struct Scsi_Host *shost = class_to_shost(dev); 2423 struct ibmvfc_host *vhost = shost_priv(shost); 2424 2425 return snprintf(buf, PAGE_SIZE, "%s\n", 2426 vhost->login_buf->resp.partition_name); 2427} 2428 2429static struct device_attribute ibmvfc_host_partition_name = { 2430 .attr = { 2431 .name = "partition_name", 2432 .mode = S_IRUGO, 2433 }, 2434 .show = ibmvfc_show_host_partition_name, 2435}; 2436 2437static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2438 struct device_attribute *attr, char *buf) 2439{ 2440 struct Scsi_Host *shost = class_to_shost(dev); 2441 struct ibmvfc_host *vhost = shost_priv(shost); 2442 2443 return snprintf(buf, PAGE_SIZE, "%s\n", 2444 vhost->login_buf->resp.device_name); 2445} 2446 2447static struct device_attribute ibmvfc_host_device_name = { 2448 .attr = { 2449 .name = "device_name", 2450 .mode = S_IRUGO, 2451 }, 2452 .show = ibmvfc_show_host_device_name, 2453}; 2454 2455static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2456 struct device_attribute *attr, char *buf) 2457{ 2458 struct Scsi_Host *shost = class_to_shost(dev); 2459 struct ibmvfc_host *vhost = shost_priv(shost); 2460 2461 return snprintf(buf, PAGE_SIZE, "%s\n", 2462 vhost->login_buf->resp.port_loc_code); 2463} 2464 2465static struct device_attribute ibmvfc_host_loc_code = { 2466 .attr = { 2467 .name = "port_loc_code", 2468 .mode = S_IRUGO, 2469 }, 2470 .show = ibmvfc_show_host_loc_code, 2471}; 2472 2473static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2474 struct device_attribute *attr, char *buf) 2475{ 2476 struct Scsi_Host *shost = class_to_shost(dev); 2477 struct ibmvfc_host *vhost = shost_priv(shost); 2478 2479 return snprintf(buf, PAGE_SIZE, "%s\n", 2480 vhost->login_buf->resp.drc_name); 2481} 2482 2483static struct device_attribute ibmvfc_host_drc_name = { 2484 .attr = { 2485 .name = "drc_name", 2486 .mode = S_IRUGO, 2487 }, 2488 .show = ibmvfc_show_host_drc_name, 2489}; 2490 2491static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2492 struct device_attribute *attr, char *buf) 2493{ 2494 struct Scsi_Host *shost = class_to_shost(dev); 2495 struct ibmvfc_host *vhost = shost_priv(shost); 2496 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2497} 2498 2499static struct device_attribute ibmvfc_host_npiv_version = { 2500 .attr = { 2501 .name = "npiv_version", 2502 .mode = S_IRUGO, 2503 }, 2504 .show = ibmvfc_show_host_npiv_version, 2505}; 2506 2507/** 2508 * ibmvfc_show_log_level - Show the adapter's error logging level 2509 * @dev: class device struct 2510 * @buf: buffer 2511 * 2512 * Return value: 2513 * number of bytes printed to buffer 2514 **/ 2515static ssize_t ibmvfc_show_log_level(struct device *dev, 2516 struct device_attribute *attr, char *buf) 2517{ 2518 struct Scsi_Host *shost = class_to_shost(dev); 2519 struct ibmvfc_host *vhost = shost_priv(shost); 2520 unsigned long flags = 0; 2521 int len; 2522 2523 spin_lock_irqsave(shost->host_lock, flags); 2524 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2525 spin_unlock_irqrestore(shost->host_lock, flags); 2526 return len; 2527} 2528 2529/** 2530 * ibmvfc_store_log_level - Change the adapter's error logging level 2531 * @dev: class device struct 2532 * @buf: buffer 2533 * 2534 * Return value: 2535 * number of bytes printed to buffer 2536 **/ 2537static ssize_t ibmvfc_store_log_level(struct device *dev, 2538 struct device_attribute *attr, 2539 const char *buf, size_t count) 2540{ 2541 struct Scsi_Host *shost = class_to_shost(dev); 2542 struct ibmvfc_host *vhost = shost_priv(shost); 2543 unsigned long flags = 0; 2544 2545 spin_lock_irqsave(shost->host_lock, flags); 2546 vhost->log_level = simple_strtoul(buf, NULL, 10); 2547 spin_unlock_irqrestore(shost->host_lock, flags); 2548 return strlen(buf); 2549} 2550 2551static struct device_attribute ibmvfc_log_level_attr = { 2552 .attr = { 2553 .name = "log_level", 2554 .mode = S_IRUGO | S_IWUSR, 2555 }, 2556 .show = ibmvfc_show_log_level, 2557 .store = ibmvfc_store_log_level 2558}; 2559 2560#ifdef CONFIG_SCSI_IBMVFC_TRACE 2561/** 2562 * ibmvfc_read_trace - Dump the adapter trace 2563 * @kobj: kobject struct 2564 * @bin_attr: bin_attribute struct 2565 * @buf: buffer 2566 * @off: offset 2567 * @count: buffer size 2568 * 2569 * Return value: 2570 * number of bytes printed to buffer 2571 **/ 2572static ssize_t ibmvfc_read_trace(struct kobject *kobj, 2573 struct bin_attribute *bin_attr, 2574 char *buf, loff_t off, size_t count) 2575{ 2576 struct device *dev = container_of(kobj, struct device, kobj); 2577 struct Scsi_Host *shost = class_to_shost(dev); 2578 struct ibmvfc_host *vhost = shost_priv(shost); 2579 unsigned long flags = 0; 2580 int size = IBMVFC_TRACE_SIZE; 2581 char *src = (char *)vhost->trace; 2582 2583 if (off > size) 2584 return 0; 2585 if (off + count > size) { 2586 size -= off; 2587 count = size; 2588 } 2589 2590 spin_lock_irqsave(shost->host_lock, flags); 2591 memcpy(buf, &src[off], count); 2592 spin_unlock_irqrestore(shost->host_lock, flags); 2593 return count; 2594} 2595 2596static struct bin_attribute ibmvfc_trace_attr = { 2597 .attr = { 2598 .name = "trace", 2599 .mode = S_IRUGO, 2600 }, 2601 .size = 0, 2602 .read = ibmvfc_read_trace, 2603}; 2604#endif 2605 2606static struct device_attribute *ibmvfc_attrs[] = { 2607 &ibmvfc_host_partition_name, 2608 &ibmvfc_host_device_name, 2609 &ibmvfc_host_loc_code, 2610 &ibmvfc_host_drc_name, 2611 &ibmvfc_host_npiv_version, 2612 &ibmvfc_log_level_attr, 2613 NULL 2614}; 2615 2616static struct scsi_host_template driver_template = { 2617 .module = THIS_MODULE, 2618 .name = "IBM POWER Virtual FC Adapter", 2619 .proc_name = IBMVFC_NAME, 2620 .queuecommand = ibmvfc_queuecommand, 2621 .eh_abort_handler = ibmvfc_eh_abort_handler, 2622 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 2623 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 2624 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 2625 .slave_alloc = ibmvfc_slave_alloc, 2626 .slave_configure = ibmvfc_slave_configure, 2627 .target_alloc = ibmvfc_target_alloc, 2628 .scan_finished = ibmvfc_scan_finished, 2629 .change_queue_depth = ibmvfc_change_queue_depth, 2630 .change_queue_type = ibmvfc_change_queue_type, 2631 .cmd_per_lun = 16, 2632 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 2633 .this_id = -1, 2634 .sg_tablesize = SG_ALL, 2635 .max_sectors = IBMVFC_MAX_SECTORS, 2636 .use_clustering = ENABLE_CLUSTERING, 2637 .shost_attrs = ibmvfc_attrs, 2638}; 2639 2640/** 2641 * ibmvfc_next_async_crq - Returns the next entry in async queue 2642 * @vhost: ibmvfc host struct 2643 * 2644 * Returns: 2645 * Pointer to next entry in queue / NULL if empty 2646 **/ 2647static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 2648{ 2649 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 2650 struct ibmvfc_async_crq *crq; 2651 2652 crq = &async_crq->msgs[async_crq->cur]; 2653 if (crq->valid & 0x80) { 2654 if (++async_crq->cur == async_crq->size) 2655 async_crq->cur = 0; 2656 } else 2657 crq = NULL; 2658 2659 return crq; 2660} 2661 2662/** 2663 * ibmvfc_next_crq - Returns the next entry in message queue 2664 * @vhost: ibmvfc host struct 2665 * 2666 * Returns: 2667 * Pointer to next entry in queue / NULL if empty 2668 **/ 2669static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 2670{ 2671 struct ibmvfc_crq_queue *queue = &vhost->crq; 2672 struct ibmvfc_crq *crq; 2673 2674 crq = &queue->msgs[queue->cur]; 2675 if (crq->valid & 0x80) { 2676 if (++queue->cur == queue->size) 2677 queue->cur = 0; 2678 } else 2679 crq = NULL; 2680 2681 return crq; 2682} 2683 2684/** 2685 * ibmvfc_interrupt - Interrupt handler 2686 * @irq: number of irq to handle, not used 2687 * @dev_instance: ibmvfc_host that received interrupt 2688 * 2689 * Returns: 2690 * IRQ_HANDLED 2691 **/ 2692static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 2693{ 2694 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 2695 struct vio_dev *vdev = to_vio_dev(vhost->dev); 2696 struct ibmvfc_crq *crq; 2697 struct ibmvfc_async_crq *async; 2698 unsigned long flags; 2699 int done = 0; 2700 2701 spin_lock_irqsave(vhost->host->host_lock, flags); 2702 vio_disable_interrupts(to_vio_dev(vhost->dev)); 2703 while (!done) { 2704 /* Pull all the valid messages off the CRQ */ 2705 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 2706 ibmvfc_handle_crq(crq, vhost); 2707 crq->valid = 0; 2708 } 2709 2710 /* Pull all the valid messages off the async CRQ */ 2711 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 2712 ibmvfc_handle_async(async, vhost); 2713 async->valid = 0; 2714 } 2715 2716 vio_enable_interrupts(vdev); 2717 if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 2718 vio_disable_interrupts(vdev); 2719 ibmvfc_handle_crq(crq, vhost); 2720 crq->valid = 0; 2721 } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 2722 vio_disable_interrupts(vdev); 2723 ibmvfc_handle_async(async, vhost); 2724 crq->valid = 0; 2725 } else 2726 done = 1; 2727 } 2728 2729 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2730 return IRQ_HANDLED; 2731} 2732 2733/** 2734 * ibmvfc_init_tgt - Set the next init job step for the target 2735 * @tgt: ibmvfc target struct 2736 * @job_step: job step to perform 2737 * 2738 **/ 2739static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 2740 void (*job_step) (struct ibmvfc_target *)) 2741{ 2742 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 2743 tgt->job_step = job_step; 2744 wake_up(&tgt->vhost->work_wait_q); 2745} 2746 2747/** 2748 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 2749 * @tgt: ibmvfc target struct 2750 * @job_step: initialization job step 2751 * 2752 **/ 2753static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 2754 void (*job_step) (struct ibmvfc_target *)) 2755{ 2756 if (++tgt->init_retries > IBMVFC_MAX_INIT_RETRIES) { 2757 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2758 wake_up(&tgt->vhost->work_wait_q); 2759 } else 2760 ibmvfc_init_tgt(tgt, job_step); 2761} 2762 2763/** 2764 * ibmvfc_tgt_prli_done - Completion handler for Process Login 2765 * @evt: ibmvfc event struct 2766 * 2767 **/ 2768static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 2769{ 2770 struct ibmvfc_target *tgt = evt->tgt; 2771 struct ibmvfc_host *vhost = evt->vhost; 2772 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 2773 u32 status = rsp->common.status; 2774 2775 vhost->discovery_threads--; 2776 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2777 switch (status) { 2778 case IBMVFC_MAD_SUCCESS: 2779 tgt_dbg(tgt, "Process Login succeeded\n"); 2780 tgt->need_login = 0; 2781 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT); 2782 break; 2783 case IBMVFC_MAD_DRIVER_FAILED: 2784 break; 2785 case IBMVFC_MAD_CRQ_ERROR: 2786 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2787 break; 2788 case IBMVFC_MAD_FAILED: 2789 default: 2790 tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 2791 ibmvfc_get_cmd_error(rsp->status, rsp->error), 2792 rsp->status, rsp->error, status); 2793 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 2794 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2795 else 2796 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2797 break; 2798 }; 2799 2800 kref_put(&tgt->kref, ibmvfc_release_tgt); 2801 ibmvfc_free_event(evt); 2802 wake_up(&vhost->work_wait_q); 2803} 2804 2805/** 2806 * ibmvfc_tgt_send_prli - Send a process login 2807 * @tgt: ibmvfc target struct 2808 * 2809 **/ 2810static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 2811{ 2812 struct ibmvfc_process_login *prli; 2813 struct ibmvfc_host *vhost = tgt->vhost; 2814 struct ibmvfc_event *evt; 2815 2816 if (vhost->discovery_threads >= disc_threads) 2817 return; 2818 2819 kref_get(&tgt->kref); 2820 evt = ibmvfc_get_event(vhost); 2821 vhost->discovery_threads++; 2822 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 2823 evt->tgt = tgt; 2824 prli = &evt->iu.prli; 2825 memset(prli, 0, sizeof(*prli)); 2826 prli->common.version = 1; 2827 prli->common.opcode = IBMVFC_PROCESS_LOGIN; 2828 prli->common.length = sizeof(*prli); 2829 prli->scsi_id = tgt->scsi_id; 2830 2831 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 2832 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; 2833 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; 2834 2835 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 2836 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 2837 vhost->discovery_threads--; 2838 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2839 kref_put(&tgt->kref, ibmvfc_release_tgt); 2840 } else 2841 tgt_dbg(tgt, "Sent process login\n"); 2842} 2843 2844/** 2845 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 2846 * @evt: ibmvfc event struct 2847 * 2848 **/ 2849static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 2850{ 2851 struct ibmvfc_target *tgt = evt->tgt; 2852 struct ibmvfc_host *vhost = evt->vhost; 2853 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 2854 u32 status = rsp->common.status; 2855 2856 vhost->discovery_threads--; 2857 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2858 switch (status) { 2859 case IBMVFC_MAD_SUCCESS: 2860 tgt_dbg(tgt, "Port Login succeeded\n"); 2861 if (tgt->ids.port_name && 2862 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 2863 vhost->reinit = 1; 2864 tgt_dbg(tgt, "Port re-init required\n"); 2865 break; 2866 } 2867 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 2868 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 2869 tgt->ids.port_id = tgt->scsi_id; 2870 tgt->ids.roles = FC_PORT_ROLE_FCP_TARGET; 2871 memcpy(&tgt->service_parms, &rsp->service_parms, 2872 sizeof(tgt->service_parms)); 2873 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 2874 sizeof(tgt->service_parms_change)); 2875 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 2876 break; 2877 case IBMVFC_MAD_DRIVER_FAILED: 2878 break; 2879 case IBMVFC_MAD_CRQ_ERROR: 2880 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 2881 break; 2882 case IBMVFC_MAD_FAILED: 2883 default: 2884 tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 2885 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 2886 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 2887 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); 2888 2889 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 2890 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 2891 else 2892 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2893 break; 2894 }; 2895 2896 kref_put(&tgt->kref, ibmvfc_release_tgt); 2897 ibmvfc_free_event(evt); 2898 wake_up(&vhost->work_wait_q); 2899} 2900 2901/** 2902 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 2903 * @tgt: ibmvfc target struct 2904 * 2905 **/ 2906static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 2907{ 2908 struct ibmvfc_port_login *plogi; 2909 struct ibmvfc_host *vhost = tgt->vhost; 2910 struct ibmvfc_event *evt; 2911 2912 if (vhost->discovery_threads >= disc_threads) 2913 return; 2914 2915 kref_get(&tgt->kref); 2916 evt = ibmvfc_get_event(vhost); 2917 vhost->discovery_threads++; 2918 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 2919 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 2920 evt->tgt = tgt; 2921 plogi = &evt->iu.plogi; 2922 memset(plogi, 0, sizeof(*plogi)); 2923 plogi->common.version = 1; 2924 plogi->common.opcode = IBMVFC_PORT_LOGIN; 2925 plogi->common.length = sizeof(*plogi); 2926 plogi->scsi_id = tgt->scsi_id; 2927 2928 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 2929 vhost->discovery_threads--; 2930 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2931 kref_put(&tgt->kref, ibmvfc_release_tgt); 2932 } else 2933 tgt_dbg(tgt, "Sent port login\n"); 2934} 2935 2936/** 2937 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 2938 * @evt: ibmvfc event struct 2939 * 2940 **/ 2941static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 2942{ 2943 struct ibmvfc_target *tgt = evt->tgt; 2944 struct ibmvfc_host *vhost = evt->vhost; 2945 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 2946 u32 status = rsp->common.status; 2947 2948 vhost->discovery_threads--; 2949 ibmvfc_free_event(evt); 2950 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2951 2952 switch (status) { 2953 case IBMVFC_MAD_SUCCESS: 2954 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 2955 break; 2956 case IBMVFC_MAD_DRIVER_FAILED: 2957 kref_put(&tgt->kref, ibmvfc_release_tgt); 2958 wake_up(&vhost->work_wait_q); 2959 return; 2960 case IBMVFC_MAD_FAILED: 2961 default: 2962 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 2963 break; 2964 }; 2965 2966 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 2967 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 2968 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 2969 tgt->scsi_id != tgt->new_scsi_id) 2970 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2971 kref_put(&tgt->kref, ibmvfc_release_tgt); 2972 wake_up(&vhost->work_wait_q); 2973} 2974 2975/** 2976 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 2977 * @tgt: ibmvfc target struct 2978 * 2979 **/ 2980static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 2981{ 2982 struct ibmvfc_implicit_logout *mad; 2983 struct ibmvfc_host *vhost = tgt->vhost; 2984 struct ibmvfc_event *evt; 2985 2986 if (vhost->discovery_threads >= disc_threads) 2987 return; 2988 2989 kref_get(&tgt->kref); 2990 evt = ibmvfc_get_event(vhost); 2991 vhost->discovery_threads++; 2992 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 2993 evt->tgt = tgt; 2994 mad = &evt->iu.implicit_logout; 2995 memset(mad, 0, sizeof(*mad)); 2996 mad->common.version = 1; 2997 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; 2998 mad->common.length = sizeof(*mad); 2999 mad->old_scsi_id = tgt->scsi_id; 3000 3001 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3002 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3003 vhost->discovery_threads--; 3004 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3005 kref_put(&tgt->kref, ibmvfc_release_tgt); 3006 } else 3007 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3008} 3009 3010/** 3011 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3012 * @mad: ibmvfc passthru mad struct 3013 * @tgt: ibmvfc target struct 3014 * 3015 * Returns: 3016 * 1 if PLOGI needed / 0 if PLOGI not needed 3017 **/ 3018static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3019 struct ibmvfc_target *tgt) 3020{ 3021 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3022 sizeof(tgt->ids.port_name))) 3023 return 1; 3024 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3025 sizeof(tgt->ids.node_name))) 3026 return 1; 3027 if (mad->fc_iu.response[6] != tgt->scsi_id) 3028 return 1; 3029 return 0; 3030} 3031 3032/** 3033 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3034 * @evt: ibmvfc event struct 3035 * 3036 **/ 3037static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3038{ 3039 struct ibmvfc_target *tgt = evt->tgt; 3040 struct ibmvfc_host *vhost = evt->vhost; 3041 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3042 u32 status = mad->common.status; 3043 u8 fc_reason, fc_explain; 3044 3045 vhost->discovery_threads--; 3046 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3047 3048 switch (status) { 3049 case IBMVFC_MAD_SUCCESS: 3050 tgt_dbg(tgt, "ADISC succeeded\n"); 3051 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3052 tgt->need_login = 1; 3053 break; 3054 case IBMVFC_MAD_DRIVER_FAILED: 3055 break; 3056 case IBMVFC_MAD_FAILED: 3057 default: 3058 tgt->need_login = 1; 3059 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; 3060 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; 3061 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3062 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), 3063 mad->iu.status, mad->iu.error, 3064 ibmvfc_get_fc_type(fc_reason), fc_reason, 3065 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3066 break; 3067 }; 3068 3069 kref_put(&tgt->kref, ibmvfc_release_tgt); 3070 ibmvfc_free_event(evt); 3071 wake_up(&vhost->work_wait_q); 3072} 3073 3074/** 3075 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3076 * @evt: ibmvfc event struct 3077 * 3078 **/ 3079static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3080{ 3081 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3082 3083 memset(mad, 0, sizeof(*mad)); 3084 mad->common.version = 1; 3085 mad->common.opcode = IBMVFC_PASSTHRU; 3086 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 3087 mad->cmd_ioba.va = (u64)evt->crq.ioba + 3088 offsetof(struct ibmvfc_passthru_mad, iu); 3089 mad->cmd_ioba.len = sizeof(mad->iu); 3090 mad->iu.cmd_len = sizeof(mad->fc_iu.payload); 3091 mad->iu.rsp_len = sizeof(mad->fc_iu.response); 3092 mad->iu.cmd.va = (u64)evt->crq.ioba + 3093 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3094 offsetof(struct ibmvfc_passthru_fc_iu, payload); 3095 mad->iu.cmd.len = sizeof(mad->fc_iu.payload); 3096 mad->iu.rsp.va = (u64)evt->crq.ioba + 3097 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3098 offsetof(struct ibmvfc_passthru_fc_iu, response); 3099 mad->iu.rsp.len = sizeof(mad->fc_iu.response); 3100} 3101 3102/** 3103 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3104 * @tgt: ibmvfc target struct 3105 * 3106 **/ 3107static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3108{ 3109 struct ibmvfc_passthru_mad *mad; 3110 struct ibmvfc_host *vhost = tgt->vhost; 3111 struct ibmvfc_event *evt; 3112 3113 if (vhost->discovery_threads >= disc_threads) 3114 return; 3115 3116 kref_get(&tgt->kref); 3117 evt = ibmvfc_get_event(vhost); 3118 vhost->discovery_threads++; 3119 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3120 evt->tgt = tgt; 3121 3122 ibmvfc_init_passthru(evt); 3123 mad = &evt->iu.passthru; 3124 mad->iu.flags = IBMVFC_FC_ELS; 3125 mad->iu.scsi_id = tgt->scsi_id; 3126 3127 mad->fc_iu.payload[0] = IBMVFC_ADISC; 3128 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3129 sizeof(vhost->login_buf->resp.port_name)); 3130 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3131 sizeof(vhost->login_buf->resp.node_name)); 3132 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; 3133 3134 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3135 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3136 vhost->discovery_threads--; 3137 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3138 kref_put(&tgt->kref, ibmvfc_release_tgt); 3139 } else 3140 tgt_dbg(tgt, "Sent ADISC\n"); 3141} 3142 3143/** 3144 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3145 * @evt: ibmvfc event struct 3146 * 3147 **/ 3148static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3149{ 3150 struct ibmvfc_target *tgt = evt->tgt; 3151 struct ibmvfc_host *vhost = evt->vhost; 3152 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3153 u32 status = rsp->common.status; 3154 3155 vhost->discovery_threads--; 3156 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3157 switch (status) { 3158 case IBMVFC_MAD_SUCCESS: 3159 tgt_dbg(tgt, "Query Target succeeded\n"); 3160 tgt->new_scsi_id = rsp->scsi_id; 3161 if (rsp->scsi_id != tgt->scsi_id) 3162 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3163 else 3164 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3165 break; 3166 case IBMVFC_MAD_DRIVER_FAILED: 3167 break; 3168 case IBMVFC_MAD_CRQ_ERROR: 3169 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3170 break; 3171 case IBMVFC_MAD_FAILED: 3172 default: 3173 tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3174 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3175 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3176 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); 3177 3178 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3179 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && 3180 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) 3181 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3182 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3183 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3184 else 3185 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3186 break; 3187 }; 3188 3189 kref_put(&tgt->kref, ibmvfc_release_tgt); 3190 ibmvfc_free_event(evt); 3191 wake_up(&vhost->work_wait_q); 3192} 3193 3194/** 3195 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3196 * @tgt: ibmvfc target struct 3197 * 3198 **/ 3199static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3200{ 3201 struct ibmvfc_query_tgt *query_tgt; 3202 struct ibmvfc_host *vhost = tgt->vhost; 3203 struct ibmvfc_event *evt; 3204 3205 if (vhost->discovery_threads >= disc_threads) 3206 return; 3207 3208 kref_get(&tgt->kref); 3209 evt = ibmvfc_get_event(vhost); 3210 vhost->discovery_threads++; 3211 evt->tgt = tgt; 3212 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3213 query_tgt = &evt->iu.query_tgt; 3214 memset(query_tgt, 0, sizeof(*query_tgt)); 3215 query_tgt->common.version = 1; 3216 query_tgt->common.opcode = IBMVFC_QUERY_TARGET; 3217 query_tgt->common.length = sizeof(*query_tgt); 3218 query_tgt->wwpn = tgt->ids.port_name; 3219 3220 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3221 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3222 vhost->discovery_threads--; 3223 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3224 kref_put(&tgt->kref, ibmvfc_release_tgt); 3225 } else 3226 tgt_dbg(tgt, "Sent Query Target\n"); 3227} 3228 3229/** 3230 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3231 * @vhost: ibmvfc host struct 3232 * @scsi_id: SCSI ID to allocate target for 3233 * 3234 * Returns: 3235 * 0 on success / other on failure 3236 **/ 3237static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3238{ 3239 struct ibmvfc_target *tgt; 3240 unsigned long flags; 3241 3242 spin_lock_irqsave(vhost->host->host_lock, flags); 3243 list_for_each_entry(tgt, &vhost->targets, queue) { 3244 if (tgt->scsi_id == scsi_id) { 3245 if (tgt->need_login) 3246 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3247 goto unlock_out; 3248 } 3249 } 3250 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3251 3252 tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL); 3253 if (!tgt) { 3254 dev_err(vhost->dev, "Target allocation failure for scsi id %08lx\n", 3255 scsi_id); 3256 return -ENOMEM; 3257 } 3258 3259 tgt->scsi_id = scsi_id; 3260 tgt->new_scsi_id = scsi_id; 3261 tgt->vhost = vhost; 3262 tgt->need_login = 1; 3263 kref_init(&tgt->kref); 3264 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3265 spin_lock_irqsave(vhost->host->host_lock, flags); 3266 list_add_tail(&tgt->queue, &vhost->targets); 3267 3268unlock_out: 3269 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3270 return 0; 3271} 3272 3273/** 3274 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3275 * @vhost: ibmvfc host struct 3276 * 3277 * Returns: 3278 * 0 on success / other on failure 3279 **/ 3280static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3281{ 3282 int i, rc; 3283 3284 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3285 rc = ibmvfc_alloc_target(vhost, 3286 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); 3287 3288 return rc; 3289} 3290 3291/** 3292 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3293 * @evt: ibmvfc event struct 3294 * 3295 **/ 3296static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3297{ 3298 struct ibmvfc_host *vhost = evt->vhost; 3299 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3300 u32 mad_status = rsp->common.status; 3301 3302 switch (mad_status) { 3303 case IBMVFC_MAD_SUCCESS: 3304 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3305 vhost->num_targets = rsp->num_written; 3306 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3307 break; 3308 case IBMVFC_MAD_FAILED: 3309 dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n", 3310 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3311 ibmvfc_retry_host_init(vhost); 3312 break; 3313 case IBMVFC_MAD_DRIVER_FAILED: 3314 break; 3315 default: 3316 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3317 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3318 break; 3319 } 3320 3321 ibmvfc_free_event(evt); 3322 wake_up(&vhost->work_wait_q); 3323} 3324 3325/** 3326 * ibmvfc_discover_targets - Send Discover Targets MAD 3327 * @vhost: ibmvfc host struct 3328 * 3329 **/ 3330static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3331{ 3332 struct ibmvfc_discover_targets *mad; 3333 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3334 3335 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3336 mad = &evt->iu.discover_targets; 3337 memset(mad, 0, sizeof(*mad)); 3338 mad->common.version = 1; 3339 mad->common.opcode = IBMVFC_DISC_TARGETS; 3340 mad->common.length = sizeof(*mad); 3341 mad->bufflen = vhost->disc_buf_sz; 3342 mad->buffer.va = vhost->disc_buf_dma; 3343 mad->buffer.len = vhost->disc_buf_sz; 3344 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3345 3346 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3347 ibmvfc_dbg(vhost, "Sent discover targets\n"); 3348 else 3349 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3350} 3351 3352/** 3353 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 3354 * @evt: ibmvfc event struct 3355 * 3356 **/ 3357static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 3358{ 3359 struct ibmvfc_host *vhost = evt->vhost; 3360 u32 mad_status = evt->xfer_iu->npiv_login.common.status; 3361 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 3362 unsigned int npiv_max_sectors; 3363 3364 switch (mad_status) { 3365 case IBMVFC_MAD_SUCCESS: 3366 ibmvfc_free_event(evt); 3367 break; 3368 case IBMVFC_MAD_FAILED: 3369 dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n", 3370 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3371 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3372 ibmvfc_retry_host_init(vhost); 3373 else 3374 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3375 ibmvfc_free_event(evt); 3376 return; 3377 case IBMVFC_MAD_CRQ_ERROR: 3378 ibmvfc_retry_host_init(vhost); 3379 case IBMVFC_MAD_DRIVER_FAILED: 3380 ibmvfc_free_event(evt); 3381 return; 3382 default: 3383 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 3384 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3385 ibmvfc_free_event(evt); 3386 return; 3387 } 3388 3389 vhost->client_migrated = 0; 3390 3391 if (!(rsp->flags & IBMVFC_NATIVE_FC)) { 3392 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 3393 rsp->flags); 3394 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3395 wake_up(&vhost->work_wait_q); 3396 return; 3397 } 3398 3399 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { 3400 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 3401 rsp->max_cmds); 3402 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3403 wake_up(&vhost->work_wait_q); 3404 return; 3405 } 3406 3407 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); 3408 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 3409 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 3410 rsp->drc_name, npiv_max_sectors); 3411 3412 fc_host_fabric_name(vhost->host) = rsp->node_name; 3413 fc_host_node_name(vhost->host) = rsp->node_name; 3414 fc_host_port_name(vhost->host) = rsp->port_name; 3415 fc_host_port_id(vhost->host) = rsp->scsi_id; 3416 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 3417 fc_host_supported_classes(vhost->host) = 0; 3418 if (rsp->service_parms.class1_parms[0] & 0x80000000) 3419 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 3420 if (rsp->service_parms.class2_parms[0] & 0x80000000) 3421 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 3422 if (rsp->service_parms.class3_parms[0] & 0x80000000) 3423 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 3424 fc_host_maxframe_size(vhost->host) = 3425 rsp->service_parms.common.bb_rcv_sz & 0x0fff; 3426 3427 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; 3428 vhost->host->max_sectors = npiv_max_sectors; 3429 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 3430 wake_up(&vhost->work_wait_q); 3431} 3432 3433/** 3434 * ibmvfc_npiv_login - Sends NPIV login 3435 * @vhost: ibmvfc host struct 3436 * 3437 **/ 3438static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 3439{ 3440 struct ibmvfc_npiv_login_mad *mad; 3441 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3442 3443 ibmvfc_gather_partition_info(vhost); 3444 ibmvfc_set_login_info(vhost); 3445 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 3446 3447 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 3448 mad = &evt->iu.npiv_login; 3449 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 3450 mad->common.version = 1; 3451 mad->common.opcode = IBMVFC_NPIV_LOGIN; 3452 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); 3453 mad->buffer.va = vhost->login_buf_dma; 3454 mad->buffer.len = sizeof(*vhost->login_buf); 3455 3456 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3457 3458 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3459 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 3460 else 3461 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3462}; 3463 3464/** 3465 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 3466 * @vhost: ibmvfc host struct 3467 * 3468 * Returns: 3469 * 1 if work to do / 0 if not 3470 **/ 3471static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 3472{ 3473 struct ibmvfc_target *tgt; 3474 3475 list_for_each_entry(tgt, &vhost->targets, queue) { 3476 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 3477 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 3478 return 1; 3479 } 3480 3481 return 0; 3482} 3483 3484/** 3485 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 3486 * @vhost: ibmvfc host struct 3487 * 3488 * Returns: 3489 * 1 if work to do / 0 if not 3490 **/ 3491static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 3492{ 3493 struct ibmvfc_target *tgt; 3494 3495 if (kthread_should_stop()) 3496 return 1; 3497 switch (vhost->action) { 3498 case IBMVFC_HOST_ACTION_NONE: 3499 case IBMVFC_HOST_ACTION_INIT_WAIT: 3500 return 0; 3501 case IBMVFC_HOST_ACTION_TGT_INIT: 3502 case IBMVFC_HOST_ACTION_QUERY_TGTS: 3503 if (vhost->discovery_threads == disc_threads) 3504 return 0; 3505 list_for_each_entry(tgt, &vhost->targets, queue) 3506 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 3507 return 1; 3508 list_for_each_entry(tgt, &vhost->targets, queue) 3509 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 3510 return 0; 3511 return 1; 3512 case IBMVFC_HOST_ACTION_INIT: 3513 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 3514 case IBMVFC_HOST_ACTION_TGT_ADD: 3515 case IBMVFC_HOST_ACTION_TGT_DEL: 3516 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 3517 case IBMVFC_HOST_ACTION_QUERY: 3518 default: 3519 break; 3520 }; 3521 3522 return 1; 3523} 3524 3525/** 3526 * ibmvfc_work_to_do - Is there task level work to do? 3527 * @vhost: ibmvfc host struct 3528 * 3529 * Returns: 3530 * 1 if work to do / 0 if not 3531 **/ 3532static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 3533{ 3534 unsigned long flags; 3535 int rc; 3536 3537 spin_lock_irqsave(vhost->host->host_lock, flags); 3538 rc = __ibmvfc_work_to_do(vhost); 3539 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3540 return rc; 3541} 3542 3543/** 3544 * ibmvfc_log_ae - Log async events if necessary 3545 * @vhost: ibmvfc host struct 3546 * @events: events to log 3547 * 3548 **/ 3549static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 3550{ 3551 if (events & IBMVFC_AE_RSCN) 3552 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 3553 if ((events & IBMVFC_AE_LINKDOWN) && 3554 vhost->state >= IBMVFC_HALTED) 3555 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 3556 if ((events & IBMVFC_AE_LINKUP) && 3557 vhost->state == IBMVFC_INITIALIZING) 3558 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 3559} 3560 3561/** 3562 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 3563 * @tgt: ibmvfc target struct 3564 * 3565 **/ 3566static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 3567{ 3568 struct ibmvfc_host *vhost = tgt->vhost; 3569 struct fc_rport *rport; 3570 unsigned long flags; 3571 3572 tgt_dbg(tgt, "Adding rport\n"); 3573 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 3574 spin_lock_irqsave(vhost->host->host_lock, flags); 3575 tgt->rport = rport; 3576 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3577 if (rport) { 3578 tgt_dbg(tgt, "rport add succeeded\n"); 3579 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; 3580 rport->supported_classes = 0; 3581 tgt->target_id = rport->scsi_target_id; 3582 if (tgt->service_parms.class1_parms[0] & 0x80000000) 3583 rport->supported_classes |= FC_COS_CLASS1; 3584 if (tgt->service_parms.class2_parms[0] & 0x80000000) 3585 rport->supported_classes |= FC_COS_CLASS2; 3586 if (tgt->service_parms.class3_parms[0] & 0x80000000) 3587 rport->supported_classes |= FC_COS_CLASS3; 3588 } else 3589 tgt_dbg(tgt, "rport add failed\n"); 3590 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3591} 3592 3593/** 3594 * ibmvfc_do_work - Do task level work 3595 * @vhost: ibmvfc host struct 3596 * 3597 **/ 3598static void ibmvfc_do_work(struct ibmvfc_host *vhost) 3599{ 3600 struct ibmvfc_target *tgt; 3601 unsigned long flags; 3602 struct fc_rport *rport; 3603 3604 ibmvfc_log_ae(vhost, vhost->events_to_log); 3605 spin_lock_irqsave(vhost->host->host_lock, flags); 3606 vhost->events_to_log = 0; 3607 switch (vhost->action) { 3608 case IBMVFC_HOST_ACTION_NONE: 3609 case IBMVFC_HOST_ACTION_INIT_WAIT: 3610 break; 3611 case IBMVFC_HOST_ACTION_INIT: 3612 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 3613 vhost->job_step(vhost); 3614 break; 3615 case IBMVFC_HOST_ACTION_QUERY: 3616 list_for_each_entry(tgt, &vhost->targets, queue) 3617 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 3618 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 3619 break; 3620 case IBMVFC_HOST_ACTION_QUERY_TGTS: 3621 list_for_each_entry(tgt, &vhost->targets, queue) { 3622 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 3623 tgt->job_step(tgt); 3624 break; 3625 } 3626 } 3627 3628 if (!ibmvfc_dev_init_to_do(vhost)) 3629 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 3630 break; 3631 case IBMVFC_HOST_ACTION_TGT_DEL: 3632 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 3633 list_for_each_entry(tgt, &vhost->targets, queue) { 3634 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 3635 tgt_dbg(tgt, "Deleting rport\n"); 3636 rport = tgt->rport; 3637 tgt->rport = NULL; 3638 list_del(&tgt->queue); 3639 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3640 if (rport) 3641 fc_remote_port_delete(rport); 3642 kref_put(&tgt->kref, ibmvfc_release_tgt); 3643 return; 3644 } 3645 } 3646 3647 if (vhost->state == IBMVFC_INITIALIZING) { 3648 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 3649 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 3650 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD); 3651 vhost->init_retries = 0; 3652 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3653 scsi_unblock_requests(vhost->host); 3654 return; 3655 } else { 3656 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 3657 vhost->job_step = ibmvfc_discover_targets; 3658 } 3659 } else { 3660 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3661 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3662 scsi_unblock_requests(vhost->host); 3663 wake_up(&vhost->init_wait_q); 3664 return; 3665 } 3666 break; 3667 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 3668 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 3669 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3670 ibmvfc_alloc_targets(vhost); 3671 spin_lock_irqsave(vhost->host->host_lock, flags); 3672 break; 3673 case IBMVFC_HOST_ACTION_TGT_INIT: 3674 list_for_each_entry(tgt, &vhost->targets, queue) { 3675 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 3676 tgt->job_step(tgt); 3677 break; 3678 } 3679 } 3680 3681 if (!ibmvfc_dev_init_to_do(vhost)) 3682 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 3683 break; 3684 case IBMVFC_HOST_ACTION_TGT_ADD: 3685 list_for_each_entry(tgt, &vhost->targets, queue) { 3686 if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) { 3687 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3688 ibmvfc_tgt_add_rport(tgt); 3689 return; 3690 } 3691 } 3692 3693 if (vhost->reinit && !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 3694 vhost->reinit = 0; 3695 scsi_block_requests(vhost->host); 3696 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 3697 } else { 3698 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3699 wake_up(&vhost->init_wait_q); 3700 } 3701 break; 3702 default: 3703 break; 3704 }; 3705 3706 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3707} 3708 3709/** 3710 * ibmvfc_work - Do task level work 3711 * @data: ibmvfc host struct 3712 * 3713 * Returns: 3714 * zero 3715 **/ 3716static int ibmvfc_work(void *data) 3717{ 3718 struct ibmvfc_host *vhost = data; 3719 int rc; 3720 3721 set_user_nice(current, -20); 3722 3723 while (1) { 3724 rc = wait_event_interruptible(vhost->work_wait_q, 3725 ibmvfc_work_to_do(vhost)); 3726 3727 BUG_ON(rc); 3728 3729 if (kthread_should_stop()) 3730 break; 3731 3732 ibmvfc_do_work(vhost); 3733 } 3734 3735 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 3736 return 0; 3737} 3738 3739/** 3740 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 3741 * @vhost: ibmvfc host struct 3742 * 3743 * Allocates a page for messages, maps it for dma, and registers 3744 * the crq with the hypervisor. 3745 * 3746 * Return value: 3747 * zero on success / other on failure 3748 **/ 3749static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 3750{ 3751 int rc, retrc = -ENOMEM; 3752 struct device *dev = vhost->dev; 3753 struct vio_dev *vdev = to_vio_dev(dev); 3754 struct ibmvfc_crq_queue *crq = &vhost->crq; 3755 3756 ENTER; 3757 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 3758 3759 if (!crq->msgs) 3760 return -ENOMEM; 3761 3762 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 3763 crq->msg_token = dma_map_single(dev, crq->msgs, 3764 PAGE_SIZE, DMA_BIDIRECTIONAL); 3765 3766 if (dma_mapping_error(dev, crq->msg_token)) 3767 goto map_failed; 3768 3769 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3770 crq->msg_token, PAGE_SIZE); 3771 3772 if (rc == H_RESOURCE) 3773 /* maybe kexecing and resource is busy. try a reset */ 3774 retrc = rc = ibmvfc_reset_crq(vhost); 3775 3776 if (rc == H_CLOSED) 3777 dev_warn(dev, "Partner adapter not ready\n"); 3778 else if (rc) { 3779 dev_warn(dev, "Error %d opening adapter\n", rc); 3780 goto reg_crq_failed; 3781 } 3782 3783 retrc = 0; 3784 3785 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 3786 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 3787 goto req_irq_failed; 3788 } 3789 3790 if ((rc = vio_enable_interrupts(vdev))) { 3791 dev_err(dev, "Error %d enabling interrupts\n", rc); 3792 goto req_irq_failed; 3793 } 3794 3795 crq->cur = 0; 3796 LEAVE; 3797 return retrc; 3798 3799req_irq_failed: 3800 do { 3801 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3802 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3803reg_crq_failed: 3804 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 3805map_failed: 3806 free_page((unsigned long)crq->msgs); 3807 return retrc; 3808} 3809 3810/** 3811 * ibmvfc_free_mem - Free memory for vhost 3812 * @vhost: ibmvfc host struct 3813 * 3814 * Return value: 3815 * none 3816 **/ 3817static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 3818{ 3819 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 3820 3821 ENTER; 3822 mempool_destroy(vhost->tgt_pool); 3823 kfree(vhost->trace); 3824 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 3825 vhost->disc_buf_dma); 3826 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 3827 vhost->login_buf, vhost->login_buf_dma); 3828 dma_pool_destroy(vhost->sg_pool); 3829 dma_unmap_single(vhost->dev, async_q->msg_token, 3830 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 3831 free_page((unsigned long)async_q->msgs); 3832 LEAVE; 3833} 3834 3835/** 3836 * ibmvfc_alloc_mem - Allocate memory for vhost 3837 * @vhost: ibmvfc host struct 3838 * 3839 * Return value: 3840 * 0 on success / non-zero on failure 3841 **/ 3842static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 3843{ 3844 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 3845 struct device *dev = vhost->dev; 3846 3847 ENTER; 3848 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 3849 if (!async_q->msgs) { 3850 dev_err(dev, "Couldn't allocate async queue.\n"); 3851 goto nomem; 3852 } 3853 3854 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 3855 async_q->msg_token = dma_map_single(dev, async_q->msgs, 3856 async_q->size * sizeof(*async_q->msgs), 3857 DMA_BIDIRECTIONAL); 3858 3859 if (dma_mapping_error(dev, async_q->msg_token)) { 3860 dev_err(dev, "Failed to map async queue\n"); 3861 goto free_async_crq; 3862 } 3863 3864 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 3865 SG_ALL * sizeof(struct srp_direct_buf), 3866 sizeof(struct srp_direct_buf), 0); 3867 3868 if (!vhost->sg_pool) { 3869 dev_err(dev, "Failed to allocate sg pool\n"); 3870 goto unmap_async_crq; 3871 } 3872 3873 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 3874 &vhost->login_buf_dma, GFP_KERNEL); 3875 3876 if (!vhost->login_buf) { 3877 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 3878 goto free_sg_pool; 3879 } 3880 3881 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 3882 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 3883 &vhost->disc_buf_dma, GFP_KERNEL); 3884 3885 if (!vhost->disc_buf) { 3886 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 3887 goto free_login_buffer; 3888 } 3889 3890 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 3891 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 3892 3893 if (!vhost->trace) 3894 goto free_disc_buffer; 3895 3896 vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 3897 sizeof(struct ibmvfc_target)); 3898 3899 if (!vhost->tgt_pool) { 3900 dev_err(dev, "Couldn't allocate target memory pool\n"); 3901 goto free_trace; 3902 } 3903 3904 LEAVE; 3905 return 0; 3906 3907free_trace: 3908 kfree(vhost->trace); 3909free_disc_buffer: 3910 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 3911 vhost->disc_buf_dma); 3912free_login_buffer: 3913 dma_free_coherent(dev, sizeof(*vhost->login_buf), 3914 vhost->login_buf, vhost->login_buf_dma); 3915free_sg_pool: 3916 dma_pool_destroy(vhost->sg_pool); 3917unmap_async_crq: 3918 dma_unmap_single(dev, async_q->msg_token, 3919 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 3920free_async_crq: 3921 free_page((unsigned long)async_q->msgs); 3922nomem: 3923 LEAVE; 3924 return -ENOMEM; 3925} 3926 3927/** 3928 * ibmvfc_probe - Adapter hot plug add entry point 3929 * @vdev: vio device struct 3930 * @id: vio device id struct 3931 * 3932 * Return value: 3933 * 0 on success / non-zero on failure 3934 **/ 3935static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 3936{ 3937 struct ibmvfc_host *vhost; 3938 struct Scsi_Host *shost; 3939 struct device *dev = &vdev->dev; 3940 int rc = -ENOMEM; 3941 3942 ENTER; 3943 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 3944 if (!shost) { 3945 dev_err(dev, "Couldn't allocate host data\n"); 3946 goto out; 3947 } 3948 3949 shost->transportt = ibmvfc_transport_template; 3950 shost->can_queue = max_requests; 3951 shost->max_lun = max_lun; 3952 shost->max_id = max_targets; 3953 shost->max_sectors = IBMVFC_MAX_SECTORS; 3954 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 3955 shost->unique_id = shost->host_no; 3956 3957 vhost = shost_priv(shost); 3958 INIT_LIST_HEAD(&vhost->sent); 3959 INIT_LIST_HEAD(&vhost->free); 3960 INIT_LIST_HEAD(&vhost->targets); 3961 sprintf(vhost->name, IBMVFC_NAME); 3962 vhost->host = shost; 3963 vhost->dev = dev; 3964 vhost->partition_number = -1; 3965 vhost->log_level = log_level; 3966 strcpy(vhost->partition_name, "UNKNOWN"); 3967 init_waitqueue_head(&vhost->work_wait_q); 3968 init_waitqueue_head(&vhost->init_wait_q); 3969 3970 if ((rc = ibmvfc_alloc_mem(vhost))) 3971 goto free_scsi_host; 3972 3973 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 3974 shost->host_no); 3975 3976 if (IS_ERR(vhost->work_thread)) { 3977 dev_err(dev, "Couldn't create kernel thread: %ld\n", 3978 PTR_ERR(vhost->work_thread)); 3979 goto free_host_mem; 3980 } 3981 3982 if ((rc = ibmvfc_init_crq(vhost))) { 3983 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 3984 goto kill_kthread; 3985 } 3986 3987 if ((rc = ibmvfc_init_event_pool(vhost))) { 3988 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 3989 goto release_crq; 3990 } 3991 3992 if ((rc = scsi_add_host(shost, dev))) 3993 goto release_event_pool; 3994 3995 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 3996 &ibmvfc_trace_attr))) { 3997 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 3998 goto remove_shost; 3999 } 4000 4001 dev_set_drvdata(dev, vhost); 4002 spin_lock(&ibmvfc_driver_lock); 4003 list_add_tail(&vhost->queue, &ibmvfc_head); 4004 spin_unlock(&ibmvfc_driver_lock); 4005 4006 ibmvfc_send_crq_init(vhost); 4007 scsi_scan_host(shost); 4008 return 0; 4009 4010remove_shost: 4011 scsi_remove_host(shost); 4012release_event_pool: 4013 ibmvfc_free_event_pool(vhost); 4014release_crq: 4015 ibmvfc_release_crq_queue(vhost); 4016kill_kthread: 4017 kthread_stop(vhost->work_thread); 4018free_host_mem: 4019 ibmvfc_free_mem(vhost); 4020free_scsi_host: 4021 scsi_host_put(shost); 4022out: 4023 LEAVE; 4024 return rc; 4025} 4026 4027/** 4028 * ibmvfc_remove - Adapter hot plug remove entry point 4029 * @vdev: vio device struct 4030 * 4031 * Return value: 4032 * 0 4033 **/ 4034static int ibmvfc_remove(struct vio_dev *vdev) 4035{ 4036 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4037 unsigned long flags; 4038 4039 ENTER; 4040 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4041 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4042 ibmvfc_wait_while_resetting(vhost); 4043 ibmvfc_release_crq_queue(vhost); 4044 kthread_stop(vhost->work_thread); 4045 fc_remove_host(vhost->host); 4046 scsi_remove_host(vhost->host); 4047 4048 spin_lock_irqsave(vhost->host->host_lock, flags); 4049 ibmvfc_purge_requests(vhost, DID_ERROR); 4050 ibmvfc_free_event_pool(vhost); 4051 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4052 4053 ibmvfc_free_mem(vhost); 4054 spin_lock(&ibmvfc_driver_lock); 4055 list_del(&vhost->queue); 4056 spin_unlock(&ibmvfc_driver_lock); 4057 scsi_host_put(vhost->host); 4058 LEAVE; 4059 return 0; 4060} 4061 4062/** 4063 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4064 * @vdev: vio device struct 4065 * 4066 * Return value: 4067 * Number of bytes the driver will need to DMA map at the same time in 4068 * order to perform well. 4069 */ 4070static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4071{ 4072 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4073 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4074} 4075 4076static struct vio_device_id ibmvfc_device_table[] __devinitdata = { 4077 {"fcp", "IBM,vfc-client"}, 4078 { "", "" } 4079}; 4080MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4081 4082static struct vio_driver ibmvfc_driver = { 4083 .id_table = ibmvfc_device_table, 4084 .probe = ibmvfc_probe, 4085 .remove = ibmvfc_remove, 4086 .get_desired_dma = ibmvfc_get_desired_dma, 4087 .driver = { 4088 .name = IBMVFC_NAME, 4089 .owner = THIS_MODULE, 4090 } 4091}; 4092 4093static struct fc_function_template ibmvfc_transport_functions = { 4094 .show_host_fabric_name = 1, 4095 .show_host_node_name = 1, 4096 .show_host_port_name = 1, 4097 .show_host_supported_classes = 1, 4098 .show_host_port_type = 1, 4099 .show_host_port_id = 1, 4100 4101 .get_host_port_state = ibmvfc_get_host_port_state, 4102 .show_host_port_state = 1, 4103 4104 .get_host_speed = ibmvfc_get_host_speed, 4105 .show_host_speed = 1, 4106 4107 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4108 .terminate_rport_io = ibmvfc_terminate_rport_io, 4109 4110 .show_rport_maxframe_size = 1, 4111 .show_rport_supported_classes = 1, 4112 4113 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4114 .show_rport_dev_loss_tmo = 1, 4115 4116 .get_starget_node_name = ibmvfc_get_starget_node_name, 4117 .show_starget_node_name = 1, 4118 4119 .get_starget_port_name = ibmvfc_get_starget_port_name, 4120 .show_starget_port_name = 1, 4121 4122 .get_starget_port_id = ibmvfc_get_starget_port_id, 4123 .show_starget_port_id = 1, 4124}; 4125 4126/** 4127 * ibmvfc_module_init - Initialize the ibmvfc module 4128 * 4129 * Return value: 4130 * 0 on success / other on failure 4131 **/ 4132static int __init ibmvfc_module_init(void) 4133{ 4134 int rc; 4135 4136 if (!firmware_has_feature(FW_FEATURE_VIO)) 4137 return -ENODEV; 4138 4139 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4140 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4141 4142 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4143 if (!ibmvfc_transport_template) 4144 return -ENOMEM; 4145 4146 rc = vio_register_driver(&ibmvfc_driver); 4147 if (rc) 4148 fc_release_transport(ibmvfc_transport_template); 4149 return rc; 4150} 4151 4152/** 4153 * ibmvfc_module_exit - Teardown the ibmvfc module 4154 * 4155 * Return value: 4156 * nothing 4157 **/ 4158static void __exit ibmvfc_module_exit(void) 4159{ 4160 vio_unregister_driver(&ibmvfc_driver); 4161 fc_release_transport(ibmvfc_transport_template); 4162} 4163 4164module_init(ibmvfc_module_init); 4165module_exit(ibmvfc_module_exit); 4166