ibmvfc.c revision 497f9c504f76e7a751cd370604e1c8521743746d
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); 79MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 80 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 81module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 82MODULE_PARM_DESC(debug, "Enable driver debug information. " 83 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 84module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR); 85MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC " 86 "transport should insulate the loss of a remote port. Once this " 87 "value is exceeded, the scsi target is removed. " 88 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]"); 89module_param_named(log_level, log_level, uint, 0); 90MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 91 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 92 93static const struct { 94 u16 status; 95 u16 error; 96 u8 result; 97 u8 retry; 98 int log; 99 char *name; 100} cmd_status [] = { 101 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 102 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 103 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 104 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 105 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 106 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 107 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 108 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 109 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 110 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 111 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 112 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 115 116 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 117 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 118 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 119 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 120 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 121 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 122 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 123 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 124 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 125 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 126 127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 128 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 129 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 131 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 132 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 133 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 134 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 135 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 136 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 137 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 138 139 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 140}; 141 142static void ibmvfc_npiv_login(struct ibmvfc_host *); 143static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 144static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 145static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 146static void ibmvfc_npiv_logout(struct ibmvfc_host *); 147 148static const char *unknown_error = "unknown error"; 149 150#ifdef CONFIG_SCSI_IBMVFC_TRACE 151/** 152 * ibmvfc_trc_start - Log a start trace entry 153 * @evt: ibmvfc event struct 154 * 155 **/ 156static void ibmvfc_trc_start(struct ibmvfc_event *evt) 157{ 158 struct ibmvfc_host *vhost = evt->vhost; 159 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 160 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 161 struct ibmvfc_trace_entry *entry; 162 163 entry = &vhost->trace[vhost->trace_index++]; 164 entry->evt = evt; 165 entry->time = jiffies; 166 entry->fmt = evt->crq.format; 167 entry->type = IBMVFC_TRC_START; 168 169 switch (entry->fmt) { 170 case IBMVFC_CMD_FORMAT: 171 entry->op_code = vfc_cmd->iu.cdb[0]; 172 entry->scsi_id = vfc_cmd->tgt_scsi_id; 173 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 174 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 175 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; 176 break; 177 case IBMVFC_MAD_FORMAT: 178 entry->op_code = mad->opcode; 179 break; 180 default: 181 break; 182 }; 183} 184 185/** 186 * ibmvfc_trc_end - Log an end trace entry 187 * @evt: ibmvfc event struct 188 * 189 **/ 190static void ibmvfc_trc_end(struct ibmvfc_event *evt) 191{ 192 struct ibmvfc_host *vhost = evt->vhost; 193 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 194 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 195 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; 196 197 entry->evt = evt; 198 entry->time = jiffies; 199 entry->fmt = evt->crq.format; 200 entry->type = IBMVFC_TRC_END; 201 202 switch (entry->fmt) { 203 case IBMVFC_CMD_FORMAT: 204 entry->op_code = vfc_cmd->iu.cdb[0]; 205 entry->scsi_id = vfc_cmd->tgt_scsi_id; 206 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 207 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 208 entry->u.end.status = vfc_cmd->status; 209 entry->u.end.error = vfc_cmd->error; 210 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; 211 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; 212 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; 213 break; 214 case IBMVFC_MAD_FORMAT: 215 entry->op_code = mad->opcode; 216 entry->u.end.status = mad->status; 217 break; 218 default: 219 break; 220 221 }; 222} 223 224#else 225#define ibmvfc_trc_start(evt) do { } while (0) 226#define ibmvfc_trc_end(evt) do { } while (0) 227#endif 228 229/** 230 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 231 * @status: status / error class 232 * @error: error 233 * 234 * Return value: 235 * index into cmd_status / -EINVAL on failure 236 **/ 237static int ibmvfc_get_err_index(u16 status, u16 error) 238{ 239 int i; 240 241 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 242 if ((cmd_status[i].status & status) == cmd_status[i].status && 243 cmd_status[i].error == error) 244 return i; 245 246 return -EINVAL; 247} 248 249/** 250 * ibmvfc_get_cmd_error - Find the error description for the fcp response 251 * @status: status / error class 252 * @error: error 253 * 254 * Return value: 255 * error description string 256 **/ 257static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 258{ 259 int rc = ibmvfc_get_err_index(status, error); 260 if (rc >= 0) 261 return cmd_status[rc].name; 262 return unknown_error; 263} 264 265/** 266 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 267 * @vfc_cmd: ibmvfc command struct 268 * 269 * Return value: 270 * SCSI result value to return for completed command 271 **/ 272static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) 273{ 274 int err; 275 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 276 int fc_rsp_len = rsp->fcp_rsp_len; 277 278 if ((rsp->flags & FCP_RSP_LEN_VALID) && 279 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 280 rsp->data.info.rsp_code)) 281 return DID_ERROR << 16; 282 283 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 284 if (err >= 0) 285 return rsp->scsi_status | (cmd_status[err].result << 16); 286 return rsp->scsi_status | (DID_ERROR << 16); 287} 288 289/** 290 * ibmvfc_retry_cmd - Determine if error status is retryable 291 * @status: status / error class 292 * @error: error 293 * 294 * Return value: 295 * 1 if error should be retried / 0 if it should not 296 **/ 297static int ibmvfc_retry_cmd(u16 status, u16 error) 298{ 299 int rc = ibmvfc_get_err_index(status, error); 300 301 if (rc >= 0) 302 return cmd_status[rc].retry; 303 return 1; 304} 305 306static const char *unknown_fc_explain = "unknown fc explain"; 307 308static const struct { 309 u16 fc_explain; 310 char *name; 311} ls_explain [] = { 312 { 0x00, "no additional explanation" }, 313 { 0x01, "service parameter error - options" }, 314 { 0x03, "service parameter error - initiator control" }, 315 { 0x05, "service parameter error - recipient control" }, 316 { 0x07, "service parameter error - received data field size" }, 317 { 0x09, "service parameter error - concurrent seq" }, 318 { 0x0B, "service parameter error - credit" }, 319 { 0x0D, "invalid N_Port/F_Port_Name" }, 320 { 0x0E, "invalid node/Fabric Name" }, 321 { 0x0F, "invalid common service parameters" }, 322 { 0x11, "invalid association header" }, 323 { 0x13, "association header required" }, 324 { 0x15, "invalid originator S_ID" }, 325 { 0x17, "invalid OX_ID-RX-ID combination" }, 326 { 0x19, "command (request) already in progress" }, 327 { 0x1E, "N_Port Login requested" }, 328 { 0x1F, "Invalid N_Port_ID" }, 329}; 330 331static const struct { 332 u16 fc_explain; 333 char *name; 334} gs_explain [] = { 335 { 0x00, "no additional explanation" }, 336 { 0x01, "port identifier not registered" }, 337 { 0x02, "port name not registered" }, 338 { 0x03, "node name not registered" }, 339 { 0x04, "class of service not registered" }, 340 { 0x06, "initial process associator not registered" }, 341 { 0x07, "FC-4 TYPEs not registered" }, 342 { 0x08, "symbolic port name not registered" }, 343 { 0x09, "symbolic node name not registered" }, 344 { 0x0A, "port type not registered" }, 345 { 0xF0, "authorization exception" }, 346 { 0xF1, "authentication exception" }, 347 { 0xF2, "data base full" }, 348 { 0xF3, "data base empty" }, 349 { 0xF4, "processing request" }, 350 { 0xF5, "unable to verify connection" }, 351 { 0xF6, "devices not in a common zone" }, 352}; 353 354/** 355 * ibmvfc_get_ls_explain - Return the FC Explain description text 356 * @status: FC Explain status 357 * 358 * Returns: 359 * error string 360 **/ 361static const char *ibmvfc_get_ls_explain(u16 status) 362{ 363 int i; 364 365 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 366 if (ls_explain[i].fc_explain == status) 367 return ls_explain[i].name; 368 369 return unknown_fc_explain; 370} 371 372/** 373 * ibmvfc_get_gs_explain - Return the FC Explain description text 374 * @status: FC Explain status 375 * 376 * Returns: 377 * error string 378 **/ 379static const char *ibmvfc_get_gs_explain(u16 status) 380{ 381 int i; 382 383 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 384 if (gs_explain[i].fc_explain == status) 385 return gs_explain[i].name; 386 387 return unknown_fc_explain; 388} 389 390static const struct { 391 enum ibmvfc_fc_type fc_type; 392 char *name; 393} fc_type [] = { 394 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 395 { IBMVFC_PORT_REJECT, "port reject" }, 396 { IBMVFC_LS_REJECT, "ELS reject" }, 397 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 398 { IBMVFC_PORT_BUSY, "port busy" }, 399 { IBMVFC_BASIC_REJECT, "basic reject" }, 400}; 401 402static const char *unknown_fc_type = "unknown fc type"; 403 404/** 405 * ibmvfc_get_fc_type - Return the FC Type description text 406 * @status: FC Type error status 407 * 408 * Returns: 409 * error string 410 **/ 411static const char *ibmvfc_get_fc_type(u16 status) 412{ 413 int i; 414 415 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 416 if (fc_type[i].fc_type == status) 417 return fc_type[i].name; 418 419 return unknown_fc_type; 420} 421 422/** 423 * ibmvfc_set_tgt_action - Set the next init action for the target 424 * @tgt: ibmvfc target struct 425 * @action: action to perform 426 * 427 **/ 428static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 429 enum ibmvfc_target_action action) 430{ 431 switch (tgt->action) { 432 case IBMVFC_TGT_ACTION_DEL_RPORT: 433 break; 434 default: 435 if (action == IBMVFC_TGT_ACTION_DEL_RPORT) 436 tgt->add_rport = 0; 437 tgt->action = action; 438 break; 439 } 440} 441 442/** 443 * ibmvfc_set_host_state - Set the state for the host 444 * @vhost: ibmvfc host struct 445 * @state: state to set host to 446 * 447 * Returns: 448 * 0 if state changed / non-zero if not changed 449 **/ 450static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 451 enum ibmvfc_host_state state) 452{ 453 int rc = 0; 454 455 switch (vhost->state) { 456 case IBMVFC_HOST_OFFLINE: 457 rc = -EINVAL; 458 break; 459 default: 460 vhost->state = state; 461 break; 462 }; 463 464 return rc; 465} 466 467/** 468 * ibmvfc_set_host_action - Set the next init action for the host 469 * @vhost: ibmvfc host struct 470 * @action: action to perform 471 * 472 **/ 473static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 474 enum ibmvfc_host_action action) 475{ 476 switch (action) { 477 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 478 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 479 vhost->action = action; 480 break; 481 case IBMVFC_HOST_ACTION_LOGO_WAIT: 482 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 483 vhost->action = action; 484 break; 485 case IBMVFC_HOST_ACTION_INIT_WAIT: 486 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 487 vhost->action = action; 488 break; 489 case IBMVFC_HOST_ACTION_QUERY: 490 switch (vhost->action) { 491 case IBMVFC_HOST_ACTION_INIT_WAIT: 492 case IBMVFC_HOST_ACTION_NONE: 493 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 494 vhost->action = action; 495 break; 496 default: 497 break; 498 }; 499 break; 500 case IBMVFC_HOST_ACTION_TGT_INIT: 501 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 502 vhost->action = action; 503 break; 504 case IBMVFC_HOST_ACTION_LOGO: 505 case IBMVFC_HOST_ACTION_INIT: 506 case IBMVFC_HOST_ACTION_TGT_DEL: 507 case IBMVFC_HOST_ACTION_QUERY_TGTS: 508 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 509 case IBMVFC_HOST_ACTION_NONE: 510 default: 511 vhost->action = action; 512 break; 513 }; 514} 515 516/** 517 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 518 * @vhost: ibmvfc host struct 519 * 520 * Return value: 521 * nothing 522 **/ 523static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 524{ 525 if (vhost->action == IBMVFC_HOST_ACTION_NONE) { 526 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 527 scsi_block_requests(vhost->host); 528 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 529 } 530 } else 531 vhost->reinit = 1; 532 533 wake_up(&vhost->work_wait_q); 534} 535 536/** 537 * ibmvfc_link_down - Handle a link down event from the adapter 538 * @vhost: ibmvfc host struct 539 * @state: ibmvfc host state to enter 540 * 541 **/ 542static void ibmvfc_link_down(struct ibmvfc_host *vhost, 543 enum ibmvfc_host_state state) 544{ 545 struct ibmvfc_target *tgt; 546 547 ENTER; 548 scsi_block_requests(vhost->host); 549 list_for_each_entry(tgt, &vhost->targets, queue) 550 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 551 ibmvfc_set_host_state(vhost, state); 552 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 553 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 554 wake_up(&vhost->work_wait_q); 555 LEAVE; 556} 557 558/** 559 * ibmvfc_init_host - Start host initialization 560 * @vhost: ibmvfc host struct 561 * @relogin: is this a re-login? 562 * 563 * Return value: 564 * nothing 565 **/ 566static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin) 567{ 568 struct ibmvfc_target *tgt; 569 570 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 571 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 572 dev_err(vhost->dev, 573 "Host initialization retries exceeded. Taking adapter offline\n"); 574 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 575 return; 576 } 577 } 578 579 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 580 if (!relogin) { 581 memset(vhost->async_crq.msgs, 0, PAGE_SIZE); 582 vhost->async_crq.cur = 0; 583 } 584 585 list_for_each_entry(tgt, &vhost->targets, queue) 586 tgt->need_login = 1; 587 scsi_block_requests(vhost->host); 588 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 589 vhost->job_step = ibmvfc_npiv_login; 590 wake_up(&vhost->work_wait_q); 591 } 592} 593 594/** 595 * ibmvfc_send_crq - Send a CRQ 596 * @vhost: ibmvfc host struct 597 * @word1: the first 64 bits of the data 598 * @word2: the second 64 bits of the data 599 * 600 * Return value: 601 * 0 on success / other on failure 602 **/ 603static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 604{ 605 struct vio_dev *vdev = to_vio_dev(vhost->dev); 606 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 607} 608 609/** 610 * ibmvfc_send_crq_init - Send a CRQ init message 611 * @vhost: ibmvfc host struct 612 * 613 * Return value: 614 * 0 on success / other on failure 615 **/ 616static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 617{ 618 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 619 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 620} 621 622/** 623 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 624 * @vhost: ibmvfc host struct 625 * 626 * Return value: 627 * 0 on success / other on failure 628 **/ 629static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 630{ 631 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 632 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 633} 634 635/** 636 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 637 * @vhost: ibmvfc host struct 638 * 639 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 640 * the crq with the hypervisor. 641 **/ 642static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 643{ 644 long rc; 645 struct vio_dev *vdev = to_vio_dev(vhost->dev); 646 struct ibmvfc_crq_queue *crq = &vhost->crq; 647 648 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 649 free_irq(vdev->irq, vhost); 650 tasklet_kill(&vhost->tasklet); 651 do { 652 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 653 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 654 655 vhost->state = IBMVFC_NO_CRQ; 656 vhost->logged_in = 0; 657 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 658 free_page((unsigned long)crq->msgs); 659} 660 661/** 662 * ibmvfc_reenable_crq_queue - reenables the CRQ 663 * @vhost: ibmvfc host struct 664 * 665 * Return value: 666 * 0 on success / other on failure 667 **/ 668static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 669{ 670 int rc; 671 struct vio_dev *vdev = to_vio_dev(vhost->dev); 672 673 /* Re-enable the CRQ */ 674 do { 675 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 676 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 677 678 if (rc) 679 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 680 681 return rc; 682} 683 684/** 685 * ibmvfc_reset_crq - resets a crq after a failure 686 * @vhost: ibmvfc host struct 687 * 688 * Return value: 689 * 0 on success / other on failure 690 **/ 691static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 692{ 693 int rc; 694 struct vio_dev *vdev = to_vio_dev(vhost->dev); 695 struct ibmvfc_crq_queue *crq = &vhost->crq; 696 697 /* Close the CRQ */ 698 do { 699 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 700 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 701 702 vhost->state = IBMVFC_NO_CRQ; 703 vhost->logged_in = 0; 704 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 705 706 /* Clean out the queue */ 707 memset(crq->msgs, 0, PAGE_SIZE); 708 crq->cur = 0; 709 710 /* And re-open it again */ 711 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 712 crq->msg_token, PAGE_SIZE); 713 714 if (rc == H_CLOSED) 715 /* Adapter is good, but other end is not ready */ 716 dev_warn(vhost->dev, "Partner adapter not ready\n"); 717 else if (rc != 0) 718 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 719 720 return rc; 721} 722 723/** 724 * ibmvfc_valid_event - Determines if event is valid. 725 * @pool: event_pool that contains the event 726 * @evt: ibmvfc event to be checked for validity 727 * 728 * Return value: 729 * 1 if event is valid / 0 if event is not valid 730 **/ 731static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 732 struct ibmvfc_event *evt) 733{ 734 int index = evt - pool->events; 735 if (index < 0 || index >= pool->size) /* outside of bounds */ 736 return 0; 737 if (evt != pool->events + index) /* unaligned */ 738 return 0; 739 return 1; 740} 741 742/** 743 * ibmvfc_free_event - Free the specified event 744 * @evt: ibmvfc_event to be freed 745 * 746 **/ 747static void ibmvfc_free_event(struct ibmvfc_event *evt) 748{ 749 struct ibmvfc_host *vhost = evt->vhost; 750 struct ibmvfc_event_pool *pool = &vhost->pool; 751 752 BUG_ON(!ibmvfc_valid_event(pool, evt)); 753 BUG_ON(atomic_inc_return(&evt->free) != 1); 754 list_add_tail(&evt->queue, &vhost->free); 755} 756 757/** 758 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 759 * @evt: ibmvfc event struct 760 * 761 * This function does not setup any error status, that must be done 762 * before this function gets called. 763 **/ 764static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 765{ 766 struct scsi_cmnd *cmnd = evt->cmnd; 767 768 if (cmnd) { 769 scsi_dma_unmap(cmnd); 770 cmnd->scsi_done(cmnd); 771 } 772 773 if (evt->eh_comp) 774 complete(evt->eh_comp); 775 776 ibmvfc_free_event(evt); 777} 778 779/** 780 * ibmvfc_fail_request - Fail request with specified error code 781 * @evt: ibmvfc event struct 782 * @error_code: error code to fail request with 783 * 784 * Return value: 785 * none 786 **/ 787static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 788{ 789 if (evt->cmnd) { 790 evt->cmnd->result = (error_code << 16); 791 evt->done = ibmvfc_scsi_eh_done; 792 } else 793 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; 794 795 list_del(&evt->queue); 796 del_timer(&evt->timer); 797 ibmvfc_trc_end(evt); 798 evt->done(evt); 799} 800 801/** 802 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 803 * @vhost: ibmvfc host struct 804 * @error_code: error code to fail requests with 805 * 806 * Return value: 807 * none 808 **/ 809static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 810{ 811 struct ibmvfc_event *evt, *pos; 812 813 ibmvfc_dbg(vhost, "Purging all requests\n"); 814 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 815 ibmvfc_fail_request(evt, error_code); 816} 817 818/** 819 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 820 * @vhost: struct ibmvfc host to reset 821 **/ 822static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 823{ 824 int rc; 825 826 scsi_block_requests(vhost->host); 827 ibmvfc_purge_requests(vhost, DID_ERROR); 828 if ((rc = ibmvfc_reset_crq(vhost)) || 829 (rc = ibmvfc_send_crq_init(vhost)) || 830 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 831 dev_err(vhost->dev, "Error after reset rc=%d\n", rc); 832 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 833 } else 834 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 835} 836 837/** 838 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 839 * @vhost: struct ibmvfc host to reset 840 **/ 841static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 842{ 843 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 844 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 845 scsi_block_requests(vhost->host); 846 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 847 vhost->job_step = ibmvfc_npiv_logout; 848 wake_up(&vhost->work_wait_q); 849 } else 850 ibmvfc_hard_reset_host(vhost); 851} 852 853/** 854 * ibmvfc_reset_host - Reset the connection to the server 855 * @vhost: ibmvfc host struct 856 **/ 857static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 858{ 859 unsigned long flags; 860 861 spin_lock_irqsave(vhost->host->host_lock, flags); 862 __ibmvfc_reset_host(vhost); 863 spin_unlock_irqrestore(vhost->host->host_lock, flags); 864} 865 866/** 867 * ibmvfc_retry_host_init - Retry host initialization if allowed 868 * @vhost: ibmvfc host struct 869 * 870 * Returns: 1 if init will be retried / 0 if not 871 * 872 **/ 873static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 874{ 875 int retry = 0; 876 877 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 878 vhost->delay_init = 1; 879 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 880 dev_err(vhost->dev, 881 "Host initialization retries exceeded. Taking adapter offline\n"); 882 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 883 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 884 __ibmvfc_reset_host(vhost); 885 else { 886 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 887 retry = 1; 888 } 889 } 890 891 wake_up(&vhost->work_wait_q); 892 return retry; 893} 894 895/** 896 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 897 * @starget: scsi target struct 898 * 899 * Return value: 900 * ibmvfc_target struct / NULL if not found 901 **/ 902static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 903{ 904 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 905 struct ibmvfc_host *vhost = shost_priv(shost); 906 struct ibmvfc_target *tgt; 907 908 list_for_each_entry(tgt, &vhost->targets, queue) 909 if (tgt->target_id == starget->id) { 910 kref_get(&tgt->kref); 911 return tgt; 912 } 913 return NULL; 914} 915 916/** 917 * ibmvfc_get_target - Find the specified scsi_target 918 * @starget: scsi target struct 919 * 920 * Return value: 921 * ibmvfc_target struct / NULL if not found 922 **/ 923static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 924{ 925 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 926 struct ibmvfc_target *tgt; 927 unsigned long flags; 928 929 spin_lock_irqsave(shost->host_lock, flags); 930 tgt = __ibmvfc_get_target(starget); 931 spin_unlock_irqrestore(shost->host_lock, flags); 932 return tgt; 933} 934 935/** 936 * ibmvfc_get_host_speed - Get host port speed 937 * @shost: scsi host struct 938 * 939 * Return value: 940 * none 941 **/ 942static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 943{ 944 struct ibmvfc_host *vhost = shost_priv(shost); 945 unsigned long flags; 946 947 spin_lock_irqsave(shost->host_lock, flags); 948 if (vhost->state == IBMVFC_ACTIVE) { 949 switch (vhost->login_buf->resp.link_speed / 100) { 950 case 1: 951 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 952 break; 953 case 2: 954 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 955 break; 956 case 4: 957 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 958 break; 959 case 8: 960 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 961 break; 962 case 10: 963 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 964 break; 965 case 16: 966 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 967 break; 968 default: 969 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 970 vhost->login_buf->resp.link_speed / 100); 971 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 972 break; 973 } 974 } else 975 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 976 spin_unlock_irqrestore(shost->host_lock, flags); 977} 978 979/** 980 * ibmvfc_get_host_port_state - Get host port state 981 * @shost: scsi host struct 982 * 983 * Return value: 984 * none 985 **/ 986static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 987{ 988 struct ibmvfc_host *vhost = shost_priv(shost); 989 unsigned long flags; 990 991 spin_lock_irqsave(shost->host_lock, flags); 992 switch (vhost->state) { 993 case IBMVFC_INITIALIZING: 994 case IBMVFC_ACTIVE: 995 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 996 break; 997 case IBMVFC_LINK_DOWN: 998 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 999 break; 1000 case IBMVFC_LINK_DEAD: 1001 case IBMVFC_HOST_OFFLINE: 1002 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1003 break; 1004 case IBMVFC_HALTED: 1005 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1006 break; 1007 case IBMVFC_NO_CRQ: 1008 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1009 break; 1010 default: 1011 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1012 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1013 break; 1014 } 1015 spin_unlock_irqrestore(shost->host_lock, flags); 1016} 1017 1018/** 1019 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1020 * @rport: rport struct 1021 * @timeout: timeout value 1022 * 1023 * Return value: 1024 * none 1025 **/ 1026static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1027{ 1028 if (timeout) 1029 rport->dev_loss_tmo = timeout; 1030 else 1031 rport->dev_loss_tmo = 1; 1032} 1033 1034/** 1035 * ibmvfc_release_tgt - Free memory allocated for a target 1036 * @kref: kref struct 1037 * 1038 **/ 1039static void ibmvfc_release_tgt(struct kref *kref) 1040{ 1041 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1042 kfree(tgt); 1043} 1044 1045/** 1046 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1047 * @starget: scsi target struct 1048 * 1049 * Return value: 1050 * none 1051 **/ 1052static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1053{ 1054 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1055 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1056 if (tgt) 1057 kref_put(&tgt->kref, ibmvfc_release_tgt); 1058} 1059 1060/** 1061 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1062 * @starget: scsi target struct 1063 * 1064 * Return value: 1065 * none 1066 **/ 1067static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1068{ 1069 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1070 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1071 if (tgt) 1072 kref_put(&tgt->kref, ibmvfc_release_tgt); 1073} 1074 1075/** 1076 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1077 * @starget: scsi target struct 1078 * 1079 * Return value: 1080 * none 1081 **/ 1082static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1083{ 1084 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1085 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1086 if (tgt) 1087 kref_put(&tgt->kref, ibmvfc_release_tgt); 1088} 1089 1090/** 1091 * ibmvfc_wait_while_resetting - Wait while the host resets 1092 * @vhost: ibmvfc host struct 1093 * 1094 * Return value: 1095 * 0 on success / other on failure 1096 **/ 1097static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1098{ 1099 long timeout = wait_event_timeout(vhost->init_wait_q, 1100 ((vhost->state == IBMVFC_ACTIVE || 1101 vhost->state == IBMVFC_HOST_OFFLINE || 1102 vhost->state == IBMVFC_LINK_DEAD) && 1103 vhost->action == IBMVFC_HOST_ACTION_NONE), 1104 (init_timeout * HZ)); 1105 1106 return timeout ? 0 : -EIO; 1107} 1108 1109/** 1110 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1111 * @shost: scsi host struct 1112 * 1113 * Return value: 1114 * 0 on success / other on failure 1115 **/ 1116static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1117{ 1118 struct ibmvfc_host *vhost = shost_priv(shost); 1119 1120 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1121 ibmvfc_reset_host(vhost); 1122 return ibmvfc_wait_while_resetting(vhost); 1123} 1124 1125/** 1126 * ibmvfc_gather_partition_info - Gather info about the LPAR 1127 * 1128 * Return value: 1129 * none 1130 **/ 1131static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1132{ 1133 struct device_node *rootdn; 1134 const char *name; 1135 const unsigned int *num; 1136 1137 rootdn = of_find_node_by_path("/"); 1138 if (!rootdn) 1139 return; 1140 1141 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1142 if (name) 1143 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1144 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1145 if (num) 1146 vhost->partition_number = *num; 1147 of_node_put(rootdn); 1148} 1149 1150/** 1151 * ibmvfc_set_login_info - Setup info for NPIV login 1152 * @vhost: ibmvfc host struct 1153 * 1154 * Return value: 1155 * none 1156 **/ 1157static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1158{ 1159 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1160 struct device_node *of_node = vhost->dev->archdata.of_node; 1161 const char *location; 1162 1163 memset(login_info, 0, sizeof(*login_info)); 1164 1165 login_info->ostype = IBMVFC_OS_LINUX; 1166 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; 1167 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); 1168 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); 1169 login_info->partition_num = vhost->partition_number; 1170 login_info->vfc_frame_version = 1; 1171 login_info->fcp_version = 3; 1172 login_info->flags = IBMVFC_FLUSH_ON_HALT; 1173 if (vhost->client_migrated) 1174 login_info->flags |= IBMVFC_CLIENT_MIGRATED; 1175 1176 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1177 login_info->capabilities = IBMVFC_CAN_MIGRATE; 1178 login_info->async.va = vhost->async_crq.msg_token; 1179 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); 1180 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1181 strncpy(login_info->device_name, 1182 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1183 1184 location = of_get_property(of_node, "ibm,loc-code", NULL); 1185 location = location ? location : dev_name(vhost->dev); 1186 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1187} 1188 1189/** 1190 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1191 * @vhost: ibmvfc host who owns the event pool 1192 * 1193 * Returns zero on success. 1194 **/ 1195static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1196{ 1197 int i; 1198 struct ibmvfc_event_pool *pool = &vhost->pool; 1199 1200 ENTER; 1201 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1202 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1203 if (!pool->events) 1204 return -ENOMEM; 1205 1206 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1207 pool->size * sizeof(*pool->iu_storage), 1208 &pool->iu_token, 0); 1209 1210 if (!pool->iu_storage) { 1211 kfree(pool->events); 1212 return -ENOMEM; 1213 } 1214 1215 for (i = 0; i < pool->size; ++i) { 1216 struct ibmvfc_event *evt = &pool->events[i]; 1217 atomic_set(&evt->free, 1); 1218 evt->crq.valid = 0x80; 1219 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); 1220 evt->xfer_iu = pool->iu_storage + i; 1221 evt->vhost = vhost; 1222 evt->ext_list = NULL; 1223 list_add_tail(&evt->queue, &vhost->free); 1224 } 1225 1226 LEAVE; 1227 return 0; 1228} 1229 1230/** 1231 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1232 * @vhost: ibmvfc host who owns the event pool 1233 * 1234 **/ 1235static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1236{ 1237 int i; 1238 struct ibmvfc_event_pool *pool = &vhost->pool; 1239 1240 ENTER; 1241 for (i = 0; i < pool->size; ++i) { 1242 list_del(&pool->events[i].queue); 1243 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1244 if (pool->events[i].ext_list) 1245 dma_pool_free(vhost->sg_pool, 1246 pool->events[i].ext_list, 1247 pool->events[i].ext_list_token); 1248 } 1249 1250 kfree(pool->events); 1251 dma_free_coherent(vhost->dev, 1252 pool->size * sizeof(*pool->iu_storage), 1253 pool->iu_storage, pool->iu_token); 1254 LEAVE; 1255} 1256 1257/** 1258 * ibmvfc_get_event - Gets the next free event in pool 1259 * @vhost: ibmvfc host struct 1260 * 1261 * Returns a free event from the pool. 1262 **/ 1263static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1264{ 1265 struct ibmvfc_event *evt; 1266 1267 BUG_ON(list_empty(&vhost->free)); 1268 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1269 atomic_set(&evt->free, 0); 1270 list_del(&evt->queue); 1271 return evt; 1272} 1273 1274/** 1275 * ibmvfc_init_event - Initialize fields in an event struct that are always 1276 * required. 1277 * @evt: The event 1278 * @done: Routine to call when the event is responded to 1279 * @format: SRP or MAD format 1280 **/ 1281static void ibmvfc_init_event(struct ibmvfc_event *evt, 1282 void (*done) (struct ibmvfc_event *), u8 format) 1283{ 1284 evt->cmnd = NULL; 1285 evt->sync_iu = NULL; 1286 evt->crq.format = format; 1287 evt->done = done; 1288 evt->eh_comp = NULL; 1289} 1290 1291/** 1292 * ibmvfc_map_sg_list - Initialize scatterlist 1293 * @scmd: scsi command struct 1294 * @nseg: number of scatterlist segments 1295 * @md: memory descriptor list to initialize 1296 **/ 1297static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1298 struct srp_direct_buf *md) 1299{ 1300 int i; 1301 struct scatterlist *sg; 1302 1303 scsi_for_each_sg(scmd, sg, nseg, i) { 1304 md[i].va = sg_dma_address(sg); 1305 md[i].len = sg_dma_len(sg); 1306 md[i].key = 0; 1307 } 1308} 1309 1310/** 1311 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1312 * @scmd: Scsi_Cmnd with the scatterlist 1313 * @evt: ibmvfc event struct 1314 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1315 * @dev: device for which to map dma memory 1316 * 1317 * Returns: 1318 * 0 on success / non-zero on failure 1319 **/ 1320static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1321 struct ibmvfc_event *evt, 1322 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1323{ 1324 1325 int sg_mapped; 1326 struct srp_direct_buf *data = &vfc_cmd->ioba; 1327 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1328 1329 sg_mapped = scsi_dma_map(scmd); 1330 if (!sg_mapped) { 1331 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; 1332 return 0; 1333 } else if (unlikely(sg_mapped < 0)) { 1334 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1335 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1336 return sg_mapped; 1337 } 1338 1339 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1340 vfc_cmd->flags |= IBMVFC_WRITE; 1341 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1342 } else { 1343 vfc_cmd->flags |= IBMVFC_READ; 1344 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1345 } 1346 1347 if (sg_mapped == 1) { 1348 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1349 return 0; 1350 } 1351 1352 vfc_cmd->flags |= IBMVFC_SCATTERLIST; 1353 1354 if (!evt->ext_list) { 1355 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1356 &evt->ext_list_token); 1357 1358 if (!evt->ext_list) { 1359 scsi_dma_unmap(scmd); 1360 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1361 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1362 return -ENOMEM; 1363 } 1364 } 1365 1366 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1367 1368 data->va = evt->ext_list_token; 1369 data->len = sg_mapped * sizeof(struct srp_direct_buf); 1370 data->key = 0; 1371 return 0; 1372} 1373 1374/** 1375 * ibmvfc_timeout - Internal command timeout handler 1376 * @evt: struct ibmvfc_event that timed out 1377 * 1378 * Called when an internally generated command times out 1379 **/ 1380static void ibmvfc_timeout(struct ibmvfc_event *evt) 1381{ 1382 struct ibmvfc_host *vhost = evt->vhost; 1383 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1384 ibmvfc_reset_host(vhost); 1385} 1386 1387/** 1388 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1389 * @evt: event to be sent 1390 * @vhost: ibmvfc host struct 1391 * @timeout: timeout in seconds - 0 means do not time command 1392 * 1393 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1394 **/ 1395static int ibmvfc_send_event(struct ibmvfc_event *evt, 1396 struct ibmvfc_host *vhost, unsigned long timeout) 1397{ 1398 u64 *crq_as_u64 = (u64 *) &evt->crq; 1399 int rc; 1400 1401 /* Copy the IU into the transfer area */ 1402 *evt->xfer_iu = evt->iu; 1403 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1404 evt->xfer_iu->cmd.tag = (u64)evt; 1405 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1406 evt->xfer_iu->mad_common.tag = (u64)evt; 1407 else 1408 BUG(); 1409 1410 list_add_tail(&evt->queue, &vhost->sent); 1411 init_timer(&evt->timer); 1412 1413 if (timeout) { 1414 evt->timer.data = (unsigned long) evt; 1415 evt->timer.expires = jiffies + (timeout * HZ); 1416 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; 1417 add_timer(&evt->timer); 1418 } 1419 1420 mb(); 1421 1422 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { 1423 list_del(&evt->queue); 1424 del_timer(&evt->timer); 1425 1426 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1427 * Firmware will send a CRQ with a transport event (0xFF) to 1428 * tell this client what has happened to the transport. This 1429 * will be handled in ibmvfc_handle_crq() 1430 */ 1431 if (rc == H_CLOSED) { 1432 if (printk_ratelimit()) 1433 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1434 if (evt->cmnd) 1435 scsi_dma_unmap(evt->cmnd); 1436 ibmvfc_free_event(evt); 1437 return SCSI_MLQUEUE_HOST_BUSY; 1438 } 1439 1440 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1441 if (evt->cmnd) { 1442 evt->cmnd->result = DID_ERROR << 16; 1443 evt->done = ibmvfc_scsi_eh_done; 1444 } else 1445 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; 1446 1447 evt->done(evt); 1448 } else 1449 ibmvfc_trc_start(evt); 1450 1451 return 0; 1452} 1453 1454/** 1455 * ibmvfc_log_error - Log an error for the failed command if appropriate 1456 * @evt: ibmvfc event to log 1457 * 1458 **/ 1459static void ibmvfc_log_error(struct ibmvfc_event *evt) 1460{ 1461 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1462 struct ibmvfc_host *vhost = evt->vhost; 1463 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1464 struct scsi_cmnd *cmnd = evt->cmnd; 1465 const char *err = unknown_error; 1466 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 1467 int logerr = 0; 1468 int rsp_code = 0; 1469 1470 if (index >= 0) { 1471 logerr = cmd_status[index].log; 1472 err = cmd_status[index].name; 1473 } 1474 1475 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1476 return; 1477 1478 if (rsp->flags & FCP_RSP_LEN_VALID) 1479 rsp_code = rsp->data.info.rsp_code; 1480 1481 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1482 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1483 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1484 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1485} 1486 1487/** 1488 * ibmvfc_scsi_done - Handle responses from commands 1489 * @evt: ibmvfc event to be handled 1490 * 1491 * Used as a callback when sending scsi cmds. 1492 **/ 1493static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1494{ 1495 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1496 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1497 struct scsi_cmnd *cmnd = evt->cmnd; 1498 u32 rsp_len = 0; 1499 u32 sense_len = rsp->fcp_sense_len; 1500 1501 if (cmnd) { 1502 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) 1503 scsi_set_resid(cmnd, vfc_cmd->adapter_resid); 1504 else if (rsp->flags & FCP_RESID_UNDER) 1505 scsi_set_resid(cmnd, rsp->fcp_resid); 1506 else 1507 scsi_set_resid(cmnd, 0); 1508 1509 if (vfc_cmd->status) { 1510 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1511 1512 if (rsp->flags & FCP_RSP_LEN_VALID) 1513 rsp_len = rsp->fcp_rsp_len; 1514 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1515 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1516 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1517 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1518 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED)) 1519 ibmvfc_reinit_host(evt->vhost); 1520 1521 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1522 cmnd->result = (DID_ERROR << 16); 1523 1524 ibmvfc_log_error(evt); 1525 } 1526 1527 if (!cmnd->result && 1528 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1529 cmnd->result = (DID_ERROR << 16); 1530 1531 scsi_dma_unmap(cmnd); 1532 cmnd->scsi_done(cmnd); 1533 } 1534 1535 if (evt->eh_comp) 1536 complete(evt->eh_comp); 1537 1538 ibmvfc_free_event(evt); 1539} 1540 1541/** 1542 * ibmvfc_host_chkready - Check if the host can accept commands 1543 * @vhost: struct ibmvfc host 1544 * 1545 * Returns: 1546 * 1 if host can accept command / 0 if not 1547 **/ 1548static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1549{ 1550 int result = 0; 1551 1552 switch (vhost->state) { 1553 case IBMVFC_LINK_DEAD: 1554 case IBMVFC_HOST_OFFLINE: 1555 result = DID_NO_CONNECT << 16; 1556 break; 1557 case IBMVFC_NO_CRQ: 1558 case IBMVFC_INITIALIZING: 1559 case IBMVFC_HALTED: 1560 case IBMVFC_LINK_DOWN: 1561 result = DID_REQUEUE << 16; 1562 break; 1563 case IBMVFC_ACTIVE: 1564 result = 0; 1565 break; 1566 }; 1567 1568 return result; 1569} 1570 1571/** 1572 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1573 * @cmnd: struct scsi_cmnd to be executed 1574 * @done: Callback function to be called when cmnd is completed 1575 * 1576 * Returns: 1577 * 0 on success / other on failure 1578 **/ 1579static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, 1580 void (*done) (struct scsi_cmnd *)) 1581{ 1582 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1583 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1584 struct ibmvfc_cmd *vfc_cmd; 1585 struct ibmvfc_event *evt; 1586 u8 tag[2]; 1587 int rc; 1588 1589 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1590 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1591 cmnd->result = rc; 1592 done(cmnd); 1593 return 0; 1594 } 1595 1596 cmnd->result = (DID_OK << 16); 1597 evt = ibmvfc_get_event(vhost); 1598 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1599 evt->cmnd = cmnd; 1600 cmnd->scsi_done = done; 1601 vfc_cmd = &evt->iu.cmd; 1602 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1603 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1604 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); 1605 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; 1606 vfc_cmd->payload_len = sizeof(vfc_cmd->iu); 1607 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); 1608 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; 1609 vfc_cmd->tgt_scsi_id = rport->port_id; 1610 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); 1611 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1612 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1613 1614 if (scsi_populate_tag_msg(cmnd, tag)) { 1615 vfc_cmd->task_tag = tag[1]; 1616 switch (tag[0]) { 1617 case MSG_SIMPLE_TAG: 1618 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1619 break; 1620 case MSG_HEAD_TAG: 1621 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; 1622 break; 1623 case MSG_ORDERED_TAG: 1624 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; 1625 break; 1626 }; 1627 } 1628 1629 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1630 return ibmvfc_send_event(evt, vhost, 0); 1631 1632 ibmvfc_free_event(evt); 1633 if (rc == -ENOMEM) 1634 return SCSI_MLQUEUE_HOST_BUSY; 1635 1636 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1637 scmd_printk(KERN_ERR, cmnd, 1638 "Failed to map DMA buffer for command. rc=%d\n", rc); 1639 1640 cmnd->result = DID_ERROR << 16; 1641 done(cmnd); 1642 return 0; 1643} 1644 1645/** 1646 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1647 * @evt: ibmvfc event struct 1648 * 1649 **/ 1650static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1651{ 1652 /* copy the response back */ 1653 if (evt->sync_iu) 1654 *evt->sync_iu = *evt->xfer_iu; 1655 1656 complete(&evt->comp); 1657} 1658 1659/** 1660 * ibmvfc_reset_device - Reset the device with the specified reset type 1661 * @sdev: scsi device to reset 1662 * @type: reset type 1663 * @desc: reset type description for log messages 1664 * 1665 * Returns: 1666 * 0 on success / other on failure 1667 **/ 1668static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1669{ 1670 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1671 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1672 struct ibmvfc_cmd *tmf; 1673 struct ibmvfc_event *evt = NULL; 1674 union ibmvfc_iu rsp_iu; 1675 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1676 int rsp_rc = -EBUSY; 1677 unsigned long flags; 1678 int rsp_code = 0; 1679 1680 spin_lock_irqsave(vhost->host->host_lock, flags); 1681 if (vhost->state == IBMVFC_ACTIVE) { 1682 evt = ibmvfc_get_event(vhost); 1683 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1684 1685 tmf = &evt->iu.cmd; 1686 memset(tmf, 0, sizeof(*tmf)); 1687 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1688 tmf->resp.len = sizeof(tmf->rsp); 1689 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1690 tmf->payload_len = sizeof(tmf->iu); 1691 tmf->resp_len = sizeof(tmf->rsp); 1692 tmf->cancel_key = (unsigned long)sdev->hostdata; 1693 tmf->tgt_scsi_id = rport->port_id; 1694 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1695 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1696 tmf->iu.tmf_flags = type; 1697 evt->sync_iu = &rsp_iu; 1698 1699 init_completion(&evt->comp); 1700 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1701 } 1702 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1703 1704 if (rsp_rc != 0) { 1705 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 1706 desc, rsp_rc); 1707 return -EIO; 1708 } 1709 1710 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 1711 wait_for_completion(&evt->comp); 1712 1713 if (rsp_iu.cmd.status) { 1714 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 1715 rsp_code = fc_rsp->data.info.rsp_code; 1716 1717 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 1718 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 1719 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 1720 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 1721 fc_rsp->scsi_status); 1722 rsp_rc = -EIO; 1723 } else 1724 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 1725 1726 spin_lock_irqsave(vhost->host->host_lock, flags); 1727 ibmvfc_free_event(evt); 1728 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1729 return rsp_rc; 1730} 1731 1732/** 1733 * ibmvfc_abort_task_set - Abort outstanding commands to the device 1734 * @sdev: scsi device to abort commands 1735 * 1736 * This sends an Abort Task Set to the VIOS for the specified device. This does 1737 * NOT send any cancel to the VIOS. That must be done separately. 1738 * 1739 * Returns: 1740 * 0 on success / other on failure 1741 **/ 1742static int ibmvfc_abort_task_set(struct scsi_device *sdev) 1743{ 1744 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1745 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1746 struct ibmvfc_cmd *tmf; 1747 struct ibmvfc_event *evt, *found_evt; 1748 union ibmvfc_iu rsp_iu; 1749 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1750 int rsp_rc = -EBUSY; 1751 unsigned long flags; 1752 int rsp_code = 0; 1753 1754 spin_lock_irqsave(vhost->host->host_lock, flags); 1755 found_evt = NULL; 1756 list_for_each_entry(evt, &vhost->sent, queue) { 1757 if (evt->cmnd && evt->cmnd->device == sdev) { 1758 found_evt = evt; 1759 break; 1760 } 1761 } 1762 1763 if (!found_evt) { 1764 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1765 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 1766 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1767 return 0; 1768 } 1769 1770 if (vhost->state == IBMVFC_ACTIVE) { 1771 evt = ibmvfc_get_event(vhost); 1772 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1773 1774 tmf = &evt->iu.cmd; 1775 memset(tmf, 0, sizeof(*tmf)); 1776 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1777 tmf->resp.len = sizeof(tmf->rsp); 1778 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1779 tmf->payload_len = sizeof(tmf->iu); 1780 tmf->resp_len = sizeof(tmf->rsp); 1781 tmf->cancel_key = (unsigned long)sdev->hostdata; 1782 tmf->tgt_scsi_id = rport->port_id; 1783 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1784 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1785 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 1786 evt->sync_iu = &rsp_iu; 1787 1788 init_completion(&evt->comp); 1789 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1790 } 1791 1792 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1793 1794 if (rsp_rc != 0) { 1795 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 1796 return -EIO; 1797 } 1798 1799 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 1800 wait_for_completion(&evt->comp); 1801 1802 if (rsp_iu.cmd.status) { 1803 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 1804 rsp_code = fc_rsp->data.info.rsp_code; 1805 1806 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 1807 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 1808 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 1809 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 1810 fc_rsp->scsi_status); 1811 rsp_rc = -EIO; 1812 } else 1813 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 1814 1815 spin_lock_irqsave(vhost->host->host_lock, flags); 1816 ibmvfc_free_event(evt); 1817 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1818 return rsp_rc; 1819} 1820 1821/** 1822 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 1823 * @sdev: scsi device to cancel commands 1824 * @type: type of error recovery being performed 1825 * 1826 * This sends a cancel to the VIOS for the specified device. This does 1827 * NOT send any abort to the actual device. That must be done separately. 1828 * 1829 * Returns: 1830 * 0 on success / other on failure 1831 **/ 1832static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 1833{ 1834 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1835 struct scsi_target *starget = scsi_target(sdev); 1836 struct fc_rport *rport = starget_to_rport(starget); 1837 struct ibmvfc_tmf *tmf; 1838 struct ibmvfc_event *evt, *found_evt; 1839 union ibmvfc_iu rsp; 1840 int rsp_rc = -EBUSY; 1841 unsigned long flags; 1842 u16 status; 1843 1844 ENTER; 1845 spin_lock_irqsave(vhost->host->host_lock, flags); 1846 found_evt = NULL; 1847 list_for_each_entry(evt, &vhost->sent, queue) { 1848 if (evt->cmnd && evt->cmnd->device == sdev) { 1849 found_evt = evt; 1850 break; 1851 } 1852 } 1853 1854 if (!found_evt) { 1855 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1856 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 1857 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1858 return 0; 1859 } 1860 1861 if (vhost->state == IBMVFC_ACTIVE) { 1862 evt = ibmvfc_get_event(vhost); 1863 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1864 1865 tmf = &evt->iu.tmf; 1866 memset(tmf, 0, sizeof(*tmf)); 1867 tmf->common.version = 1; 1868 tmf->common.opcode = IBMVFC_TMF_MAD; 1869 tmf->common.length = sizeof(*tmf); 1870 tmf->scsi_id = rport->port_id; 1871 int_to_scsilun(sdev->lun, &tmf->lun); 1872 tmf->flags = (type | IBMVFC_TMF_LUA_VALID); 1873 tmf->cancel_key = (unsigned long)sdev->hostdata; 1874 tmf->my_cancel_key = (unsigned long)starget->hostdata; 1875 1876 evt->sync_iu = &rsp; 1877 init_completion(&evt->comp); 1878 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1879 } 1880 1881 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1882 1883 if (rsp_rc != 0) { 1884 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 1885 return -EIO; 1886 } 1887 1888 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 1889 1890 wait_for_completion(&evt->comp); 1891 status = rsp.mad_common.status; 1892 spin_lock_irqsave(vhost->host->host_lock, flags); 1893 ibmvfc_free_event(evt); 1894 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1895 1896 if (status != IBMVFC_MAD_SUCCESS) { 1897 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 1898 return -EIO; 1899 } 1900 1901 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 1902 return 0; 1903} 1904 1905/** 1906 * ibmvfc_match_target - Match function for specified target 1907 * @evt: ibmvfc event struct 1908 * @device: device to match (starget) 1909 * 1910 * Returns: 1911 * 1 if event matches starget / 0 if event does not match starget 1912 **/ 1913static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 1914{ 1915 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 1916 return 1; 1917 return 0; 1918} 1919 1920/** 1921 * ibmvfc_match_lun - Match function for specified LUN 1922 * @evt: ibmvfc event struct 1923 * @device: device to match (sdev) 1924 * 1925 * Returns: 1926 * 1 if event matches sdev / 0 if event does not match sdev 1927 **/ 1928static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 1929{ 1930 if (evt->cmnd && evt->cmnd->device == device) 1931 return 1; 1932 return 0; 1933} 1934 1935/** 1936 * ibmvfc_wait_for_ops - Wait for ops to complete 1937 * @vhost: ibmvfc host struct 1938 * @device: device to match (starget or sdev) 1939 * @match: match function 1940 * 1941 * Returns: 1942 * SUCCESS / FAILED 1943 **/ 1944static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 1945 int (*match) (struct ibmvfc_event *, void *)) 1946{ 1947 struct ibmvfc_event *evt; 1948 DECLARE_COMPLETION_ONSTACK(comp); 1949 int wait; 1950 unsigned long flags; 1951 signed long timeout = init_timeout * HZ; 1952 1953 ENTER; 1954 do { 1955 wait = 0; 1956 spin_lock_irqsave(vhost->host->host_lock, flags); 1957 list_for_each_entry(evt, &vhost->sent, queue) { 1958 if (match(evt, device)) { 1959 evt->eh_comp = ∁ 1960 wait++; 1961 } 1962 } 1963 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1964 1965 if (wait) { 1966 timeout = wait_for_completion_timeout(&comp, timeout); 1967 1968 if (!timeout) { 1969 wait = 0; 1970 spin_lock_irqsave(vhost->host->host_lock, flags); 1971 list_for_each_entry(evt, &vhost->sent, queue) { 1972 if (match(evt, device)) { 1973 evt->eh_comp = NULL; 1974 wait++; 1975 } 1976 } 1977 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1978 if (wait) 1979 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 1980 LEAVE; 1981 return wait ? FAILED : SUCCESS; 1982 } 1983 } 1984 } while (wait); 1985 1986 LEAVE; 1987 return SUCCESS; 1988} 1989 1990/** 1991 * ibmvfc_eh_abort_handler - Abort a command 1992 * @cmd: scsi command to abort 1993 * 1994 * Returns: 1995 * SUCCESS / FAILED 1996 **/ 1997static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 1998{ 1999 struct scsi_device *sdev = cmd->device; 2000 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2001 int cancel_rc, abort_rc; 2002 int rc = FAILED; 2003 2004 ENTER; 2005 ibmvfc_wait_while_resetting(vhost); 2006 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2007 abort_rc = ibmvfc_abort_task_set(sdev); 2008 2009 if (!cancel_rc && !abort_rc) 2010 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2011 2012 LEAVE; 2013 return rc; 2014} 2015 2016/** 2017 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2018 * @cmd: scsi command struct 2019 * 2020 * Returns: 2021 * SUCCESS / FAILED 2022 **/ 2023static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2024{ 2025 struct scsi_device *sdev = cmd->device; 2026 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2027 int cancel_rc, reset_rc; 2028 int rc = FAILED; 2029 2030 ENTER; 2031 ibmvfc_wait_while_resetting(vhost); 2032 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2033 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2034 2035 if (!cancel_rc && !reset_rc) 2036 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2037 2038 LEAVE; 2039 return rc; 2040} 2041 2042/** 2043 * ibmvfc_dev_cancel_all - Device iterated cancel all function 2044 * @sdev: scsi device struct 2045 * @data: return code 2046 * 2047 **/ 2048static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data) 2049{ 2050 unsigned long *rc = data; 2051 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2052} 2053 2054/** 2055 * ibmvfc_dev_abort_all - Device iterated abort task set function 2056 * @sdev: scsi device struct 2057 * @data: return code 2058 * 2059 **/ 2060static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) 2061{ 2062 unsigned long *rc = data; 2063 *rc |= ibmvfc_abort_task_set(sdev); 2064} 2065 2066/** 2067 * ibmvfc_eh_target_reset_handler - Reset the target 2068 * @cmd: scsi command struct 2069 * 2070 * Returns: 2071 * SUCCESS / FAILED 2072 **/ 2073static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2074{ 2075 struct scsi_device *sdev = cmd->device; 2076 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2077 struct scsi_target *starget = scsi_target(sdev); 2078 int reset_rc; 2079 int rc = FAILED; 2080 unsigned long cancel_rc = 0; 2081 2082 ENTER; 2083 ibmvfc_wait_while_resetting(vhost); 2084 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); 2085 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2086 2087 if (!cancel_rc && !reset_rc) 2088 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2089 2090 LEAVE; 2091 return rc; 2092} 2093 2094/** 2095 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2096 * @cmd: struct scsi_cmnd having problems 2097 * 2098 **/ 2099static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2100{ 2101 int rc; 2102 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2103 2104 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2105 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2106 return rc ? FAILED : SUCCESS; 2107} 2108 2109/** 2110 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2111 * @rport: rport struct 2112 * 2113 * Return value: 2114 * none 2115 **/ 2116static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2117{ 2118 struct scsi_target *starget = to_scsi_target(&rport->dev); 2119 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2120 struct ibmvfc_host *vhost = shost_priv(shost); 2121 unsigned long cancel_rc = 0; 2122 unsigned long abort_rc = 0; 2123 int rc = FAILED; 2124 2125 ENTER; 2126 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); 2127 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); 2128 2129 if (!cancel_rc && !abort_rc) 2130 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2131 2132 if (rc == FAILED) 2133 ibmvfc_issue_fc_host_lip(shost); 2134 LEAVE; 2135} 2136 2137static const struct { 2138 enum ibmvfc_async_event ae; 2139 const char *desc; 2140} ae_desc [] = { 2141 { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, 2142 { IBMVFC_AE_ELS_LOGO, "LOGO" }, 2143 { IBMVFC_AE_ELS_PRLO, "PRLO" }, 2144 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, 2145 { IBMVFC_AE_SCN_GROUP, "Group SCN" }, 2146 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, 2147 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, 2148 { IBMVFC_AE_LINK_UP, "Link Up" }, 2149 { IBMVFC_AE_LINK_DOWN, "Link Down" }, 2150 { IBMVFC_AE_LINK_DEAD, "Link Dead" }, 2151 { IBMVFC_AE_HALT, "Halt" }, 2152 { IBMVFC_AE_RESUME, "Resume" }, 2153 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, 2154}; 2155 2156static const char *unknown_ae = "Unknown async"; 2157 2158/** 2159 * ibmvfc_get_ae_desc - Get text description for async event 2160 * @ae: async event 2161 * 2162 **/ 2163static const char *ibmvfc_get_ae_desc(u64 ae) 2164{ 2165 int i; 2166 2167 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2168 if (ae_desc[i].ae == ae) 2169 return ae_desc[i].desc; 2170 2171 return unknown_ae; 2172} 2173 2174/** 2175 * ibmvfc_handle_async - Handle an async event from the adapter 2176 * @crq: crq to process 2177 * @vhost: ibmvfc host struct 2178 * 2179 **/ 2180static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2181 struct ibmvfc_host *vhost) 2182{ 2183 const char *desc = ibmvfc_get_ae_desc(crq->event); 2184 2185 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx," 2186 " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name); 2187 2188 switch (crq->event) { 2189 case IBMVFC_AE_RESUME: 2190 switch (crq->link_state) { 2191 case IBMVFC_AE_LS_LINK_DOWN: 2192 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2193 break; 2194 case IBMVFC_AE_LS_LINK_DEAD: 2195 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2196 break; 2197 case IBMVFC_AE_LS_LINK_UP: 2198 case IBMVFC_AE_LS_LINK_BOUNCED: 2199 default: 2200 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2201 vhost->delay_init = 1; 2202 __ibmvfc_reset_host(vhost); 2203 break; 2204 }; 2205 2206 break; 2207 case IBMVFC_AE_LINK_UP: 2208 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2209 vhost->delay_init = 1; 2210 __ibmvfc_reset_host(vhost); 2211 break; 2212 case IBMVFC_AE_SCN_FABRIC: 2213 case IBMVFC_AE_SCN_DOMAIN: 2214 vhost->events_to_log |= IBMVFC_AE_RSCN; 2215 vhost->delay_init = 1; 2216 __ibmvfc_reset_host(vhost); 2217 break; 2218 case IBMVFC_AE_SCN_NPORT: 2219 case IBMVFC_AE_SCN_GROUP: 2220 vhost->events_to_log |= IBMVFC_AE_RSCN; 2221 case IBMVFC_AE_ELS_LOGO: 2222 case IBMVFC_AE_ELS_PRLO: 2223 case IBMVFC_AE_ELS_PLOGI: 2224 ibmvfc_reinit_host(vhost); 2225 break; 2226 case IBMVFC_AE_LINK_DOWN: 2227 case IBMVFC_AE_ADAPTER_FAILED: 2228 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2229 break; 2230 case IBMVFC_AE_LINK_DEAD: 2231 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2232 break; 2233 case IBMVFC_AE_HALT: 2234 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2235 break; 2236 default: 2237 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2238 break; 2239 }; 2240} 2241 2242/** 2243 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2244 * @crq: Command/Response queue 2245 * @vhost: ibmvfc host struct 2246 * 2247 **/ 2248static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2249{ 2250 long rc; 2251 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; 2252 2253 switch (crq->valid) { 2254 case IBMVFC_CRQ_INIT_RSP: 2255 switch (crq->format) { 2256 case IBMVFC_CRQ_INIT: 2257 dev_info(vhost->dev, "Partner initialized\n"); 2258 /* Send back a response */ 2259 rc = ibmvfc_send_crq_init_complete(vhost); 2260 if (rc == 0) 2261 ibmvfc_init_host(vhost, 0); 2262 else 2263 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2264 break; 2265 case IBMVFC_CRQ_INIT_COMPLETE: 2266 dev_info(vhost->dev, "Partner initialization complete\n"); 2267 ibmvfc_init_host(vhost, 0); 2268 break; 2269 default: 2270 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2271 } 2272 return; 2273 case IBMVFC_CRQ_XPORT_EVENT: 2274 vhost->state = IBMVFC_NO_CRQ; 2275 vhost->logged_in = 0; 2276 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2277 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2278 /* We need to re-setup the interpartition connection */ 2279 dev_info(vhost->dev, "Re-enabling adapter\n"); 2280 vhost->client_migrated = 1; 2281 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2282 if ((rc = ibmvfc_reenable_crq_queue(vhost)) || 2283 (rc = ibmvfc_send_crq_init(vhost))) { 2284 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2285 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); 2286 } else 2287 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2288 } else { 2289 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2290 2291 ibmvfc_purge_requests(vhost, DID_ERROR); 2292 if ((rc = ibmvfc_reset_crq(vhost)) || 2293 (rc = ibmvfc_send_crq_init(vhost))) { 2294 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2295 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); 2296 } else 2297 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2298 } 2299 return; 2300 case IBMVFC_CRQ_CMD_RSP: 2301 break; 2302 default: 2303 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2304 return; 2305 } 2306 2307 if (crq->format == IBMVFC_ASYNC_EVENT) 2308 return; 2309 2310 /* The only kind of payload CRQs we should get are responses to 2311 * things we send. Make sure this response is to something we 2312 * actually sent 2313 */ 2314 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2315 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2316 crq->ioba); 2317 return; 2318 } 2319 2320 if (unlikely(atomic_read(&evt->free))) { 2321 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2322 crq->ioba); 2323 return; 2324 } 2325 2326 del_timer(&evt->timer); 2327 list_del(&evt->queue); 2328 ibmvfc_trc_end(evt); 2329 evt->done(evt); 2330} 2331 2332/** 2333 * ibmvfc_scan_finished - Check if the device scan is done. 2334 * @shost: scsi host struct 2335 * @time: current elapsed time 2336 * 2337 * Returns: 2338 * 0 if scan is not done / 1 if scan is done 2339 **/ 2340static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2341{ 2342 unsigned long flags; 2343 struct ibmvfc_host *vhost = shost_priv(shost); 2344 int done = 0; 2345 2346 spin_lock_irqsave(shost->host_lock, flags); 2347 if (time >= (init_timeout * HZ)) { 2348 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2349 "continuing initialization\n", init_timeout); 2350 done = 1; 2351 } 2352 2353 if (vhost->scan_complete) 2354 done = 1; 2355 spin_unlock_irqrestore(shost->host_lock, flags); 2356 return done; 2357} 2358 2359/** 2360 * ibmvfc_slave_alloc - Setup the device's task set value 2361 * @sdev: struct scsi_device device to configure 2362 * 2363 * Set the device's task set value so that error handling works as 2364 * expected. 2365 * 2366 * Returns: 2367 * 0 on success / -ENXIO if device does not exist 2368 **/ 2369static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2370{ 2371 struct Scsi_Host *shost = sdev->host; 2372 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2373 struct ibmvfc_host *vhost = shost_priv(shost); 2374 unsigned long flags = 0; 2375 2376 if (!rport || fc_remote_port_chkready(rport)) 2377 return -ENXIO; 2378 2379 spin_lock_irqsave(shost->host_lock, flags); 2380 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2381 spin_unlock_irqrestore(shost->host_lock, flags); 2382 return 0; 2383} 2384 2385/** 2386 * ibmvfc_target_alloc - Setup the target's task set value 2387 * @starget: struct scsi_target 2388 * 2389 * Set the target's task set value so that error handling works as 2390 * expected. 2391 * 2392 * Returns: 2393 * 0 on success / -ENXIO if device does not exist 2394 **/ 2395static int ibmvfc_target_alloc(struct scsi_target *starget) 2396{ 2397 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2398 struct ibmvfc_host *vhost = shost_priv(shost); 2399 unsigned long flags = 0; 2400 2401 spin_lock_irqsave(shost->host_lock, flags); 2402 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2403 spin_unlock_irqrestore(shost->host_lock, flags); 2404 return 0; 2405} 2406 2407/** 2408 * ibmvfc_slave_configure - Configure the device 2409 * @sdev: struct scsi_device device to configure 2410 * 2411 * Enable allow_restart for a device if it is a disk. Adjust the 2412 * queue_depth here also. 2413 * 2414 * Returns: 2415 * 0 2416 **/ 2417static int ibmvfc_slave_configure(struct scsi_device *sdev) 2418{ 2419 struct Scsi_Host *shost = sdev->host; 2420 struct fc_rport *rport = starget_to_rport(sdev->sdev_target); 2421 unsigned long flags = 0; 2422 2423 spin_lock_irqsave(shost->host_lock, flags); 2424 if (sdev->type == TYPE_DISK) 2425 sdev->allow_restart = 1; 2426 2427 if (sdev->tagged_supported) { 2428 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 2429 scsi_activate_tcq(sdev, sdev->queue_depth); 2430 } else 2431 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2432 2433 rport->dev_loss_tmo = dev_loss_tmo; 2434 spin_unlock_irqrestore(shost->host_lock, flags); 2435 return 0; 2436} 2437 2438/** 2439 * ibmvfc_change_queue_depth - Change the device's queue depth 2440 * @sdev: scsi device struct 2441 * @qdepth: depth to set 2442 * 2443 * Return value: 2444 * actual depth set 2445 **/ 2446static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 2447{ 2448 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2449 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2450 2451 scsi_adjust_queue_depth(sdev, 0, qdepth); 2452 return sdev->queue_depth; 2453} 2454 2455/** 2456 * ibmvfc_change_queue_type - Change the device's queue type 2457 * @sdev: scsi device struct 2458 * @tag_type: type of tags to use 2459 * 2460 * Return value: 2461 * actual queue type set 2462 **/ 2463static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) 2464{ 2465 if (sdev->tagged_supported) { 2466 scsi_set_tag_type(sdev, tag_type); 2467 2468 if (tag_type) 2469 scsi_activate_tcq(sdev, sdev->queue_depth); 2470 else 2471 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2472 } else 2473 tag_type = 0; 2474 2475 return tag_type; 2476} 2477 2478static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2479 struct device_attribute *attr, char *buf) 2480{ 2481 struct Scsi_Host *shost = class_to_shost(dev); 2482 struct ibmvfc_host *vhost = shost_priv(shost); 2483 2484 return snprintf(buf, PAGE_SIZE, "%s\n", 2485 vhost->login_buf->resp.partition_name); 2486} 2487 2488static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2489 struct device_attribute *attr, char *buf) 2490{ 2491 struct Scsi_Host *shost = class_to_shost(dev); 2492 struct ibmvfc_host *vhost = shost_priv(shost); 2493 2494 return snprintf(buf, PAGE_SIZE, "%s\n", 2495 vhost->login_buf->resp.device_name); 2496} 2497 2498static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2499 struct device_attribute *attr, char *buf) 2500{ 2501 struct Scsi_Host *shost = class_to_shost(dev); 2502 struct ibmvfc_host *vhost = shost_priv(shost); 2503 2504 return snprintf(buf, PAGE_SIZE, "%s\n", 2505 vhost->login_buf->resp.port_loc_code); 2506} 2507 2508static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2509 struct device_attribute *attr, char *buf) 2510{ 2511 struct Scsi_Host *shost = class_to_shost(dev); 2512 struct ibmvfc_host *vhost = shost_priv(shost); 2513 2514 return snprintf(buf, PAGE_SIZE, "%s\n", 2515 vhost->login_buf->resp.drc_name); 2516} 2517 2518static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2519 struct device_attribute *attr, char *buf) 2520{ 2521 struct Scsi_Host *shost = class_to_shost(dev); 2522 struct ibmvfc_host *vhost = shost_priv(shost); 2523 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2524} 2525 2526static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 2527 struct device_attribute *attr, char *buf) 2528{ 2529 struct Scsi_Host *shost = class_to_shost(dev); 2530 struct ibmvfc_host *vhost = shost_priv(shost); 2531 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); 2532} 2533 2534/** 2535 * ibmvfc_show_log_level - Show the adapter's error logging level 2536 * @dev: class device struct 2537 * @buf: buffer 2538 * 2539 * Return value: 2540 * number of bytes printed to buffer 2541 **/ 2542static ssize_t ibmvfc_show_log_level(struct device *dev, 2543 struct device_attribute *attr, char *buf) 2544{ 2545 struct Scsi_Host *shost = class_to_shost(dev); 2546 struct ibmvfc_host *vhost = shost_priv(shost); 2547 unsigned long flags = 0; 2548 int len; 2549 2550 spin_lock_irqsave(shost->host_lock, flags); 2551 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2552 spin_unlock_irqrestore(shost->host_lock, flags); 2553 return len; 2554} 2555 2556/** 2557 * ibmvfc_store_log_level - Change the adapter's error logging level 2558 * @dev: class device struct 2559 * @buf: buffer 2560 * 2561 * Return value: 2562 * number of bytes printed to buffer 2563 **/ 2564static ssize_t ibmvfc_store_log_level(struct device *dev, 2565 struct device_attribute *attr, 2566 const char *buf, size_t count) 2567{ 2568 struct Scsi_Host *shost = class_to_shost(dev); 2569 struct ibmvfc_host *vhost = shost_priv(shost); 2570 unsigned long flags = 0; 2571 2572 spin_lock_irqsave(shost->host_lock, flags); 2573 vhost->log_level = simple_strtoul(buf, NULL, 10); 2574 spin_unlock_irqrestore(shost->host_lock, flags); 2575 return strlen(buf); 2576} 2577 2578static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 2579static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 2580static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 2581static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 2582static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 2583static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 2584static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 2585 ibmvfc_show_log_level, ibmvfc_store_log_level); 2586 2587#ifdef CONFIG_SCSI_IBMVFC_TRACE 2588/** 2589 * ibmvfc_read_trace - Dump the adapter trace 2590 * @kobj: kobject struct 2591 * @bin_attr: bin_attribute struct 2592 * @buf: buffer 2593 * @off: offset 2594 * @count: buffer size 2595 * 2596 * Return value: 2597 * number of bytes printed to buffer 2598 **/ 2599static ssize_t ibmvfc_read_trace(struct kobject *kobj, 2600 struct bin_attribute *bin_attr, 2601 char *buf, loff_t off, size_t count) 2602{ 2603 struct device *dev = container_of(kobj, struct device, kobj); 2604 struct Scsi_Host *shost = class_to_shost(dev); 2605 struct ibmvfc_host *vhost = shost_priv(shost); 2606 unsigned long flags = 0; 2607 int size = IBMVFC_TRACE_SIZE; 2608 char *src = (char *)vhost->trace; 2609 2610 if (off > size) 2611 return 0; 2612 if (off + count > size) { 2613 size -= off; 2614 count = size; 2615 } 2616 2617 spin_lock_irqsave(shost->host_lock, flags); 2618 memcpy(buf, &src[off], count); 2619 spin_unlock_irqrestore(shost->host_lock, flags); 2620 return count; 2621} 2622 2623static struct bin_attribute ibmvfc_trace_attr = { 2624 .attr = { 2625 .name = "trace", 2626 .mode = S_IRUGO, 2627 }, 2628 .size = 0, 2629 .read = ibmvfc_read_trace, 2630}; 2631#endif 2632 2633static struct device_attribute *ibmvfc_attrs[] = { 2634 &dev_attr_partition_name, 2635 &dev_attr_device_name, 2636 &dev_attr_port_loc_code, 2637 &dev_attr_drc_name, 2638 &dev_attr_npiv_version, 2639 &dev_attr_capabilities, 2640 &dev_attr_log_level, 2641 NULL 2642}; 2643 2644static struct scsi_host_template driver_template = { 2645 .module = THIS_MODULE, 2646 .name = "IBM POWER Virtual FC Adapter", 2647 .proc_name = IBMVFC_NAME, 2648 .queuecommand = ibmvfc_queuecommand, 2649 .eh_abort_handler = ibmvfc_eh_abort_handler, 2650 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 2651 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 2652 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 2653 .slave_alloc = ibmvfc_slave_alloc, 2654 .slave_configure = ibmvfc_slave_configure, 2655 .target_alloc = ibmvfc_target_alloc, 2656 .scan_finished = ibmvfc_scan_finished, 2657 .change_queue_depth = ibmvfc_change_queue_depth, 2658 .change_queue_type = ibmvfc_change_queue_type, 2659 .cmd_per_lun = 16, 2660 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 2661 .this_id = -1, 2662 .sg_tablesize = SG_ALL, 2663 .max_sectors = IBMVFC_MAX_SECTORS, 2664 .use_clustering = ENABLE_CLUSTERING, 2665 .shost_attrs = ibmvfc_attrs, 2666}; 2667 2668/** 2669 * ibmvfc_next_async_crq - Returns the next entry in async queue 2670 * @vhost: ibmvfc host struct 2671 * 2672 * Returns: 2673 * Pointer to next entry in queue / NULL if empty 2674 **/ 2675static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 2676{ 2677 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 2678 struct ibmvfc_async_crq *crq; 2679 2680 crq = &async_crq->msgs[async_crq->cur]; 2681 if (crq->valid & 0x80) { 2682 if (++async_crq->cur == async_crq->size) 2683 async_crq->cur = 0; 2684 } else 2685 crq = NULL; 2686 2687 return crq; 2688} 2689 2690/** 2691 * ibmvfc_next_crq - Returns the next entry in message queue 2692 * @vhost: ibmvfc host struct 2693 * 2694 * Returns: 2695 * Pointer to next entry in queue / NULL if empty 2696 **/ 2697static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 2698{ 2699 struct ibmvfc_crq_queue *queue = &vhost->crq; 2700 struct ibmvfc_crq *crq; 2701 2702 crq = &queue->msgs[queue->cur]; 2703 if (crq->valid & 0x80) { 2704 if (++queue->cur == queue->size) 2705 queue->cur = 0; 2706 } else 2707 crq = NULL; 2708 2709 return crq; 2710} 2711 2712/** 2713 * ibmvfc_interrupt - Interrupt handler 2714 * @irq: number of irq to handle, not used 2715 * @dev_instance: ibmvfc_host that received interrupt 2716 * 2717 * Returns: 2718 * IRQ_HANDLED 2719 **/ 2720static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 2721{ 2722 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 2723 unsigned long flags; 2724 2725 spin_lock_irqsave(vhost->host->host_lock, flags); 2726 vio_disable_interrupts(to_vio_dev(vhost->dev)); 2727 tasklet_schedule(&vhost->tasklet); 2728 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2729 return IRQ_HANDLED; 2730} 2731 2732/** 2733 * ibmvfc_tasklet - Interrupt handler tasklet 2734 * @data: ibmvfc host struct 2735 * 2736 * Returns: 2737 * Nothing 2738 **/ 2739static void ibmvfc_tasklet(void *data) 2740{ 2741 struct ibmvfc_host *vhost = data; 2742 struct vio_dev *vdev = to_vio_dev(vhost->dev); 2743 struct ibmvfc_crq *crq; 2744 struct ibmvfc_async_crq *async; 2745 unsigned long flags; 2746 int done = 0; 2747 2748 spin_lock_irqsave(vhost->host->host_lock, flags); 2749 while (!done) { 2750 /* Pull all the valid messages off the CRQ */ 2751 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 2752 ibmvfc_handle_crq(crq, vhost); 2753 crq->valid = 0; 2754 } 2755 2756 /* Pull all the valid messages off the async CRQ */ 2757 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 2758 ibmvfc_handle_async(async, vhost); 2759 async->valid = 0; 2760 } 2761 2762 vio_enable_interrupts(vdev); 2763 if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 2764 vio_disable_interrupts(vdev); 2765 ibmvfc_handle_crq(crq, vhost); 2766 crq->valid = 0; 2767 } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 2768 vio_disable_interrupts(vdev); 2769 ibmvfc_handle_async(async, vhost); 2770 async->valid = 0; 2771 } else 2772 done = 1; 2773 } 2774 2775 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2776} 2777 2778/** 2779 * ibmvfc_init_tgt - Set the next init job step for the target 2780 * @tgt: ibmvfc target struct 2781 * @job_step: job step to perform 2782 * 2783 **/ 2784static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 2785 void (*job_step) (struct ibmvfc_target *)) 2786{ 2787 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 2788 tgt->job_step = job_step; 2789 wake_up(&tgt->vhost->work_wait_q); 2790} 2791 2792/** 2793 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 2794 * @tgt: ibmvfc target struct 2795 * @job_step: initialization job step 2796 * 2797 * Returns: 1 if step will be retried / 0 if not 2798 * 2799 **/ 2800static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 2801 void (*job_step) (struct ibmvfc_target *)) 2802{ 2803 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 2804 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2805 wake_up(&tgt->vhost->work_wait_q); 2806 return 0; 2807 } else 2808 ibmvfc_init_tgt(tgt, job_step); 2809 return 1; 2810} 2811 2812/* Defined in FC-LS */ 2813static const struct { 2814 int code; 2815 int retry; 2816 int logged_in; 2817} prli_rsp [] = { 2818 { 0, 1, 0 }, 2819 { 1, 0, 1 }, 2820 { 2, 1, 0 }, 2821 { 3, 1, 0 }, 2822 { 4, 0, 0 }, 2823 { 5, 0, 0 }, 2824 { 6, 0, 1 }, 2825 { 7, 0, 0 }, 2826 { 8, 1, 0 }, 2827}; 2828 2829/** 2830 * ibmvfc_get_prli_rsp - Find PRLI response index 2831 * @flags: PRLI response flags 2832 * 2833 **/ 2834static int ibmvfc_get_prli_rsp(u16 flags) 2835{ 2836 int i; 2837 int code = (flags & 0x0f00) >> 8; 2838 2839 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 2840 if (prli_rsp[i].code == code) 2841 return i; 2842 2843 return 0; 2844} 2845 2846/** 2847 * ibmvfc_tgt_prli_done - Completion handler for Process Login 2848 * @evt: ibmvfc event struct 2849 * 2850 **/ 2851static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 2852{ 2853 struct ibmvfc_target *tgt = evt->tgt; 2854 struct ibmvfc_host *vhost = evt->vhost; 2855 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 2856 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 2857 u32 status = rsp->common.status; 2858 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 2859 2860 vhost->discovery_threads--; 2861 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2862 switch (status) { 2863 case IBMVFC_MAD_SUCCESS: 2864 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 2865 parms->type, parms->flags, parms->service_parms); 2866 2867 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 2868 index = ibmvfc_get_prli_rsp(parms->flags); 2869 if (prli_rsp[index].logged_in) { 2870 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) { 2871 tgt->need_login = 0; 2872 tgt->ids.roles = 0; 2873 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC) 2874 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 2875 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC) 2876 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 2877 tgt->add_rport = 1; 2878 } else 2879 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2880 } else if (prli_rsp[index].retry) 2881 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2882 else 2883 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2884 } else 2885 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2886 break; 2887 case IBMVFC_MAD_DRIVER_FAILED: 2888 break; 2889 case IBMVFC_MAD_CRQ_ERROR: 2890 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2891 break; 2892 case IBMVFC_MAD_FAILED: 2893 default: 2894 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 2895 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2896 else 2897 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2898 2899 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 2900 ibmvfc_get_cmd_error(rsp->status, rsp->error), 2901 rsp->status, rsp->error, status); 2902 break; 2903 }; 2904 2905 kref_put(&tgt->kref, ibmvfc_release_tgt); 2906 ibmvfc_free_event(evt); 2907 wake_up(&vhost->work_wait_q); 2908} 2909 2910/** 2911 * ibmvfc_tgt_send_prli - Send a process login 2912 * @tgt: ibmvfc target struct 2913 * 2914 **/ 2915static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 2916{ 2917 struct ibmvfc_process_login *prli; 2918 struct ibmvfc_host *vhost = tgt->vhost; 2919 struct ibmvfc_event *evt; 2920 2921 if (vhost->discovery_threads >= disc_threads) 2922 return; 2923 2924 kref_get(&tgt->kref); 2925 evt = ibmvfc_get_event(vhost); 2926 vhost->discovery_threads++; 2927 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 2928 evt->tgt = tgt; 2929 prli = &evt->iu.prli; 2930 memset(prli, 0, sizeof(*prli)); 2931 prli->common.version = 1; 2932 prli->common.opcode = IBMVFC_PROCESS_LOGIN; 2933 prli->common.length = sizeof(*prli); 2934 prli->scsi_id = tgt->scsi_id; 2935 2936 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 2937 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; 2938 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; 2939 2940 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 2941 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 2942 vhost->discovery_threads--; 2943 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2944 kref_put(&tgt->kref, ibmvfc_release_tgt); 2945 } else 2946 tgt_dbg(tgt, "Sent process login\n"); 2947} 2948 2949/** 2950 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 2951 * @evt: ibmvfc event struct 2952 * 2953 **/ 2954static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 2955{ 2956 struct ibmvfc_target *tgt = evt->tgt; 2957 struct ibmvfc_host *vhost = evt->vhost; 2958 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 2959 u32 status = rsp->common.status; 2960 int level = IBMVFC_DEFAULT_LOG_LEVEL; 2961 2962 vhost->discovery_threads--; 2963 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2964 switch (status) { 2965 case IBMVFC_MAD_SUCCESS: 2966 tgt_dbg(tgt, "Port Login succeeded\n"); 2967 if (tgt->ids.port_name && 2968 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 2969 vhost->reinit = 1; 2970 tgt_dbg(tgt, "Port re-init required\n"); 2971 break; 2972 } 2973 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 2974 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 2975 tgt->ids.port_id = tgt->scsi_id; 2976 memcpy(&tgt->service_parms, &rsp->service_parms, 2977 sizeof(tgt->service_parms)); 2978 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 2979 sizeof(tgt->service_parms_change)); 2980 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 2981 break; 2982 case IBMVFC_MAD_DRIVER_FAILED: 2983 break; 2984 case IBMVFC_MAD_CRQ_ERROR: 2985 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 2986 break; 2987 case IBMVFC_MAD_FAILED: 2988 default: 2989 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 2990 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 2991 else 2992 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2993 2994 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 2995 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 2996 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 2997 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); 2998 break; 2999 }; 3000 3001 kref_put(&tgt->kref, ibmvfc_release_tgt); 3002 ibmvfc_free_event(evt); 3003 wake_up(&vhost->work_wait_q); 3004} 3005 3006/** 3007 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3008 * @tgt: ibmvfc target struct 3009 * 3010 **/ 3011static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3012{ 3013 struct ibmvfc_port_login *plogi; 3014 struct ibmvfc_host *vhost = tgt->vhost; 3015 struct ibmvfc_event *evt; 3016 3017 if (vhost->discovery_threads >= disc_threads) 3018 return; 3019 3020 kref_get(&tgt->kref); 3021 evt = ibmvfc_get_event(vhost); 3022 vhost->discovery_threads++; 3023 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3024 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3025 evt->tgt = tgt; 3026 plogi = &evt->iu.plogi; 3027 memset(plogi, 0, sizeof(*plogi)); 3028 plogi->common.version = 1; 3029 plogi->common.opcode = IBMVFC_PORT_LOGIN; 3030 plogi->common.length = sizeof(*plogi); 3031 plogi->scsi_id = tgt->scsi_id; 3032 3033 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3034 vhost->discovery_threads--; 3035 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3036 kref_put(&tgt->kref, ibmvfc_release_tgt); 3037 } else 3038 tgt_dbg(tgt, "Sent port login\n"); 3039} 3040 3041/** 3042 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3043 * @evt: ibmvfc event struct 3044 * 3045 **/ 3046static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3047{ 3048 struct ibmvfc_target *tgt = evt->tgt; 3049 struct ibmvfc_host *vhost = evt->vhost; 3050 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3051 u32 status = rsp->common.status; 3052 3053 vhost->discovery_threads--; 3054 ibmvfc_free_event(evt); 3055 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3056 3057 switch (status) { 3058 case IBMVFC_MAD_SUCCESS: 3059 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3060 break; 3061 case IBMVFC_MAD_DRIVER_FAILED: 3062 kref_put(&tgt->kref, ibmvfc_release_tgt); 3063 wake_up(&vhost->work_wait_q); 3064 return; 3065 case IBMVFC_MAD_FAILED: 3066 default: 3067 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3068 break; 3069 }; 3070 3071 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3072 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3073 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3074 tgt->scsi_id != tgt->new_scsi_id) 3075 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3076 kref_put(&tgt->kref, ibmvfc_release_tgt); 3077 wake_up(&vhost->work_wait_q); 3078} 3079 3080/** 3081 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3082 * @tgt: ibmvfc target struct 3083 * 3084 **/ 3085static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3086{ 3087 struct ibmvfc_implicit_logout *mad; 3088 struct ibmvfc_host *vhost = tgt->vhost; 3089 struct ibmvfc_event *evt; 3090 3091 if (vhost->discovery_threads >= disc_threads) 3092 return; 3093 3094 kref_get(&tgt->kref); 3095 evt = ibmvfc_get_event(vhost); 3096 vhost->discovery_threads++; 3097 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3098 evt->tgt = tgt; 3099 mad = &evt->iu.implicit_logout; 3100 memset(mad, 0, sizeof(*mad)); 3101 mad->common.version = 1; 3102 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; 3103 mad->common.length = sizeof(*mad); 3104 mad->old_scsi_id = tgt->scsi_id; 3105 3106 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3107 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3108 vhost->discovery_threads--; 3109 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3110 kref_put(&tgt->kref, ibmvfc_release_tgt); 3111 } else 3112 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3113} 3114 3115/** 3116 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3117 * @mad: ibmvfc passthru mad struct 3118 * @tgt: ibmvfc target struct 3119 * 3120 * Returns: 3121 * 1 if PLOGI needed / 0 if PLOGI not needed 3122 **/ 3123static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3124 struct ibmvfc_target *tgt) 3125{ 3126 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3127 sizeof(tgt->ids.port_name))) 3128 return 1; 3129 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3130 sizeof(tgt->ids.node_name))) 3131 return 1; 3132 if (mad->fc_iu.response[6] != tgt->scsi_id) 3133 return 1; 3134 return 0; 3135} 3136 3137/** 3138 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3139 * @evt: ibmvfc event struct 3140 * 3141 **/ 3142static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3143{ 3144 struct ibmvfc_target *tgt = evt->tgt; 3145 struct ibmvfc_host *vhost = evt->vhost; 3146 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3147 u32 status = mad->common.status; 3148 u8 fc_reason, fc_explain; 3149 3150 vhost->discovery_threads--; 3151 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3152 del_timer(&tgt->timer); 3153 3154 switch (status) { 3155 case IBMVFC_MAD_SUCCESS: 3156 tgt_dbg(tgt, "ADISC succeeded\n"); 3157 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3158 tgt->need_login = 1; 3159 break; 3160 case IBMVFC_MAD_DRIVER_FAILED: 3161 break; 3162 case IBMVFC_MAD_FAILED: 3163 default: 3164 tgt->need_login = 1; 3165 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; 3166 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; 3167 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3168 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), 3169 mad->iu.status, mad->iu.error, 3170 ibmvfc_get_fc_type(fc_reason), fc_reason, 3171 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3172 break; 3173 }; 3174 3175 kref_put(&tgt->kref, ibmvfc_release_tgt); 3176 ibmvfc_free_event(evt); 3177 wake_up(&vhost->work_wait_q); 3178} 3179 3180/** 3181 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3182 * @evt: ibmvfc event struct 3183 * 3184 **/ 3185static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3186{ 3187 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3188 3189 memset(mad, 0, sizeof(*mad)); 3190 mad->common.version = 1; 3191 mad->common.opcode = IBMVFC_PASSTHRU; 3192 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 3193 mad->cmd_ioba.va = (u64)evt->crq.ioba + 3194 offsetof(struct ibmvfc_passthru_mad, iu); 3195 mad->cmd_ioba.len = sizeof(mad->iu); 3196 mad->iu.cmd_len = sizeof(mad->fc_iu.payload); 3197 mad->iu.rsp_len = sizeof(mad->fc_iu.response); 3198 mad->iu.cmd.va = (u64)evt->crq.ioba + 3199 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3200 offsetof(struct ibmvfc_passthru_fc_iu, payload); 3201 mad->iu.cmd.len = sizeof(mad->fc_iu.payload); 3202 mad->iu.rsp.va = (u64)evt->crq.ioba + 3203 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3204 offsetof(struct ibmvfc_passthru_fc_iu, response); 3205 mad->iu.rsp.len = sizeof(mad->fc_iu.response); 3206} 3207 3208/** 3209 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3210 * @evt: ibmvfc event struct 3211 * 3212 * Just cleanup this event struct. Everything else is handled by 3213 * the ADISC completion handler. If the ADISC never actually comes 3214 * back, we still have the timer running on the ADISC event struct 3215 * which will fire and cause the CRQ to get reset. 3216 * 3217 **/ 3218static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3219{ 3220 struct ibmvfc_host *vhost = evt->vhost; 3221 struct ibmvfc_target *tgt = evt->tgt; 3222 3223 tgt_dbg(tgt, "ADISC cancel complete\n"); 3224 vhost->abort_threads--; 3225 ibmvfc_free_event(evt); 3226 kref_put(&tgt->kref, ibmvfc_release_tgt); 3227 wake_up(&vhost->work_wait_q); 3228} 3229 3230/** 3231 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3232 * @tgt: ibmvfc target struct 3233 * 3234 * If an ADISC times out, send a cancel. If the cancel times 3235 * out, reset the CRQ. When the ADISC comes back as cancelled, 3236 * log back into the target. 3237 **/ 3238static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) 3239{ 3240 struct ibmvfc_host *vhost = tgt->vhost; 3241 struct ibmvfc_event *evt; 3242 struct ibmvfc_tmf *tmf; 3243 unsigned long flags; 3244 int rc; 3245 3246 tgt_dbg(tgt, "ADISC timeout\n"); 3247 spin_lock_irqsave(vhost->host->host_lock, flags); 3248 if (vhost->abort_threads >= disc_threads || 3249 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3250 vhost->state != IBMVFC_INITIALIZING || 3251 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3252 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3253 return; 3254 } 3255 3256 vhost->abort_threads++; 3257 kref_get(&tgt->kref); 3258 evt = ibmvfc_get_event(vhost); 3259 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3260 3261 evt->tgt = tgt; 3262 tmf = &evt->iu.tmf; 3263 memset(tmf, 0, sizeof(*tmf)); 3264 tmf->common.version = 1; 3265 tmf->common.opcode = IBMVFC_TMF_MAD; 3266 tmf->common.length = sizeof(*tmf); 3267 tmf->scsi_id = tgt->scsi_id; 3268 tmf->cancel_key = tgt->cancel_key; 3269 3270 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3271 3272 if (rc) { 3273 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3274 vhost->abort_threads--; 3275 kref_put(&tgt->kref, ibmvfc_release_tgt); 3276 __ibmvfc_reset_host(vhost); 3277 } else 3278 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3279 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3280} 3281 3282/** 3283 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3284 * @tgt: ibmvfc target struct 3285 * 3286 * When sending an ADISC we end up with two timers running. The 3287 * first timer is the timer in the ibmvfc target struct. If this 3288 * fires, we send a cancel to the target. The second timer is the 3289 * timer on the ibmvfc event for the ADISC, which is longer. If that 3290 * fires, it means the ADISC timed out and our attempt to cancel it 3291 * also failed, so we need to reset the CRQ. 3292 **/ 3293static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3294{ 3295 struct ibmvfc_passthru_mad *mad; 3296 struct ibmvfc_host *vhost = tgt->vhost; 3297 struct ibmvfc_event *evt; 3298 3299 if (vhost->discovery_threads >= disc_threads) 3300 return; 3301 3302 kref_get(&tgt->kref); 3303 evt = ibmvfc_get_event(vhost); 3304 vhost->discovery_threads++; 3305 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3306 evt->tgt = tgt; 3307 3308 ibmvfc_init_passthru(evt); 3309 mad = &evt->iu.passthru; 3310 mad->iu.flags = IBMVFC_FC_ELS; 3311 mad->iu.scsi_id = tgt->scsi_id; 3312 mad->iu.cancel_key = tgt->cancel_key; 3313 3314 mad->fc_iu.payload[0] = IBMVFC_ADISC; 3315 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3316 sizeof(vhost->login_buf->resp.port_name)); 3317 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3318 sizeof(vhost->login_buf->resp.node_name)); 3319 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; 3320 3321 if (timer_pending(&tgt->timer)) 3322 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3323 else { 3324 tgt->timer.data = (unsigned long) tgt; 3325 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3326 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; 3327 add_timer(&tgt->timer); 3328 } 3329 3330 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3331 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3332 vhost->discovery_threads--; 3333 del_timer(&tgt->timer); 3334 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3335 kref_put(&tgt->kref, ibmvfc_release_tgt); 3336 } else 3337 tgt_dbg(tgt, "Sent ADISC\n"); 3338} 3339 3340/** 3341 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3342 * @evt: ibmvfc event struct 3343 * 3344 **/ 3345static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3346{ 3347 struct ibmvfc_target *tgt = evt->tgt; 3348 struct ibmvfc_host *vhost = evt->vhost; 3349 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3350 u32 status = rsp->common.status; 3351 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3352 3353 vhost->discovery_threads--; 3354 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3355 switch (status) { 3356 case IBMVFC_MAD_SUCCESS: 3357 tgt_dbg(tgt, "Query Target succeeded\n"); 3358 tgt->new_scsi_id = rsp->scsi_id; 3359 if (rsp->scsi_id != tgt->scsi_id) 3360 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3361 else 3362 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3363 break; 3364 case IBMVFC_MAD_DRIVER_FAILED: 3365 break; 3366 case IBMVFC_MAD_CRQ_ERROR: 3367 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3368 break; 3369 case IBMVFC_MAD_FAILED: 3370 default: 3371 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3372 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && 3373 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) 3374 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3375 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3376 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3377 else 3378 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3379 3380 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3381 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3382 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3383 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); 3384 break; 3385 }; 3386 3387 kref_put(&tgt->kref, ibmvfc_release_tgt); 3388 ibmvfc_free_event(evt); 3389 wake_up(&vhost->work_wait_q); 3390} 3391 3392/** 3393 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3394 * @tgt: ibmvfc target struct 3395 * 3396 **/ 3397static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3398{ 3399 struct ibmvfc_query_tgt *query_tgt; 3400 struct ibmvfc_host *vhost = tgt->vhost; 3401 struct ibmvfc_event *evt; 3402 3403 if (vhost->discovery_threads >= disc_threads) 3404 return; 3405 3406 kref_get(&tgt->kref); 3407 evt = ibmvfc_get_event(vhost); 3408 vhost->discovery_threads++; 3409 evt->tgt = tgt; 3410 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3411 query_tgt = &evt->iu.query_tgt; 3412 memset(query_tgt, 0, sizeof(*query_tgt)); 3413 query_tgt->common.version = 1; 3414 query_tgt->common.opcode = IBMVFC_QUERY_TARGET; 3415 query_tgt->common.length = sizeof(*query_tgt); 3416 query_tgt->wwpn = tgt->ids.port_name; 3417 3418 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3419 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3420 vhost->discovery_threads--; 3421 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3422 kref_put(&tgt->kref, ibmvfc_release_tgt); 3423 } else 3424 tgt_dbg(tgt, "Sent Query Target\n"); 3425} 3426 3427/** 3428 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3429 * @vhost: ibmvfc host struct 3430 * @scsi_id: SCSI ID to allocate target for 3431 * 3432 * Returns: 3433 * 0 on success / other on failure 3434 **/ 3435static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3436{ 3437 struct ibmvfc_target *tgt; 3438 unsigned long flags; 3439 3440 spin_lock_irqsave(vhost->host->host_lock, flags); 3441 list_for_each_entry(tgt, &vhost->targets, queue) { 3442 if (tgt->scsi_id == scsi_id) { 3443 if (tgt->need_login) 3444 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3445 goto unlock_out; 3446 } 3447 } 3448 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3449 3450 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3451 if (!tgt) { 3452 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", 3453 scsi_id); 3454 return -ENOMEM; 3455 } 3456 3457 memset(tgt, 0, sizeof(*tgt)); 3458 tgt->scsi_id = scsi_id; 3459 tgt->new_scsi_id = scsi_id; 3460 tgt->vhost = vhost; 3461 tgt->need_login = 1; 3462 tgt->cancel_key = vhost->task_set++; 3463 init_timer(&tgt->timer); 3464 kref_init(&tgt->kref); 3465 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3466 spin_lock_irqsave(vhost->host->host_lock, flags); 3467 list_add_tail(&tgt->queue, &vhost->targets); 3468 3469unlock_out: 3470 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3471 return 0; 3472} 3473 3474/** 3475 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3476 * @vhost: ibmvfc host struct 3477 * 3478 * Returns: 3479 * 0 on success / other on failure 3480 **/ 3481static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3482{ 3483 int i, rc; 3484 3485 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3486 rc = ibmvfc_alloc_target(vhost, 3487 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); 3488 3489 return rc; 3490} 3491 3492/** 3493 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3494 * @evt: ibmvfc event struct 3495 * 3496 **/ 3497static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3498{ 3499 struct ibmvfc_host *vhost = evt->vhost; 3500 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3501 u32 mad_status = rsp->common.status; 3502 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3503 3504 switch (mad_status) { 3505 case IBMVFC_MAD_SUCCESS: 3506 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3507 vhost->num_targets = rsp->num_written; 3508 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3509 break; 3510 case IBMVFC_MAD_FAILED: 3511 level += ibmvfc_retry_host_init(vhost); 3512 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 3513 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3514 break; 3515 case IBMVFC_MAD_DRIVER_FAILED: 3516 break; 3517 default: 3518 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3519 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3520 break; 3521 } 3522 3523 ibmvfc_free_event(evt); 3524 wake_up(&vhost->work_wait_q); 3525} 3526 3527/** 3528 * ibmvfc_discover_targets - Send Discover Targets MAD 3529 * @vhost: ibmvfc host struct 3530 * 3531 **/ 3532static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3533{ 3534 struct ibmvfc_discover_targets *mad; 3535 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3536 3537 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3538 mad = &evt->iu.discover_targets; 3539 memset(mad, 0, sizeof(*mad)); 3540 mad->common.version = 1; 3541 mad->common.opcode = IBMVFC_DISC_TARGETS; 3542 mad->common.length = sizeof(*mad); 3543 mad->bufflen = vhost->disc_buf_sz; 3544 mad->buffer.va = vhost->disc_buf_dma; 3545 mad->buffer.len = vhost->disc_buf_sz; 3546 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3547 3548 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3549 ibmvfc_dbg(vhost, "Sent discover targets\n"); 3550 else 3551 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3552} 3553 3554/** 3555 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 3556 * @evt: ibmvfc event struct 3557 * 3558 **/ 3559static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 3560{ 3561 struct ibmvfc_host *vhost = evt->vhost; 3562 u32 mad_status = evt->xfer_iu->npiv_login.common.status; 3563 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 3564 unsigned int npiv_max_sectors; 3565 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3566 3567 switch (mad_status) { 3568 case IBMVFC_MAD_SUCCESS: 3569 ibmvfc_free_event(evt); 3570 break; 3571 case IBMVFC_MAD_FAILED: 3572 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3573 level += ibmvfc_retry_host_init(vhost); 3574 else 3575 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3576 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 3577 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3578 ibmvfc_free_event(evt); 3579 return; 3580 case IBMVFC_MAD_CRQ_ERROR: 3581 ibmvfc_retry_host_init(vhost); 3582 case IBMVFC_MAD_DRIVER_FAILED: 3583 ibmvfc_free_event(evt); 3584 return; 3585 default: 3586 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 3587 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3588 ibmvfc_free_event(evt); 3589 return; 3590 } 3591 3592 vhost->client_migrated = 0; 3593 3594 if (!(rsp->flags & IBMVFC_NATIVE_FC)) { 3595 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 3596 rsp->flags); 3597 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3598 wake_up(&vhost->work_wait_q); 3599 return; 3600 } 3601 3602 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { 3603 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 3604 rsp->max_cmds); 3605 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3606 wake_up(&vhost->work_wait_q); 3607 return; 3608 } 3609 3610 vhost->logged_in = 1; 3611 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); 3612 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 3613 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 3614 rsp->drc_name, npiv_max_sectors); 3615 3616 fc_host_fabric_name(vhost->host) = rsp->node_name; 3617 fc_host_node_name(vhost->host) = rsp->node_name; 3618 fc_host_port_name(vhost->host) = rsp->port_name; 3619 fc_host_port_id(vhost->host) = rsp->scsi_id; 3620 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 3621 fc_host_supported_classes(vhost->host) = 0; 3622 if (rsp->service_parms.class1_parms[0] & 0x80000000) 3623 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 3624 if (rsp->service_parms.class2_parms[0] & 0x80000000) 3625 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 3626 if (rsp->service_parms.class3_parms[0] & 0x80000000) 3627 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 3628 fc_host_maxframe_size(vhost->host) = 3629 rsp->service_parms.common.bb_rcv_sz & 0x0fff; 3630 3631 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; 3632 vhost->host->max_sectors = npiv_max_sectors; 3633 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 3634 wake_up(&vhost->work_wait_q); 3635} 3636 3637/** 3638 * ibmvfc_npiv_login - Sends NPIV login 3639 * @vhost: ibmvfc host struct 3640 * 3641 **/ 3642static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 3643{ 3644 struct ibmvfc_npiv_login_mad *mad; 3645 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3646 3647 ibmvfc_gather_partition_info(vhost); 3648 ibmvfc_set_login_info(vhost); 3649 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 3650 3651 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 3652 mad = &evt->iu.npiv_login; 3653 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 3654 mad->common.version = 1; 3655 mad->common.opcode = IBMVFC_NPIV_LOGIN; 3656 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); 3657 mad->buffer.va = vhost->login_buf_dma; 3658 mad->buffer.len = sizeof(*vhost->login_buf); 3659 3660 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3661 3662 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3663 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 3664 else 3665 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3666}; 3667 3668/** 3669 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 3670 * @vhost: ibmvfc host struct 3671 * 3672 **/ 3673static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 3674{ 3675 struct ibmvfc_host *vhost = evt->vhost; 3676 u32 mad_status = evt->xfer_iu->npiv_logout.common.status; 3677 3678 ibmvfc_free_event(evt); 3679 3680 switch (mad_status) { 3681 case IBMVFC_MAD_SUCCESS: 3682 if (list_empty(&vhost->sent) && 3683 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 3684 ibmvfc_init_host(vhost, 0); 3685 return; 3686 } 3687 break; 3688 case IBMVFC_MAD_FAILED: 3689 case IBMVFC_MAD_NOT_SUPPORTED: 3690 case IBMVFC_MAD_CRQ_ERROR: 3691 case IBMVFC_MAD_DRIVER_FAILED: 3692 default: 3693 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 3694 break; 3695 } 3696 3697 ibmvfc_hard_reset_host(vhost); 3698} 3699 3700/** 3701 * ibmvfc_npiv_logout - Issue an NPIV Logout 3702 * @vhost: ibmvfc host struct 3703 * 3704 **/ 3705static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 3706{ 3707 struct ibmvfc_npiv_logout_mad *mad; 3708 struct ibmvfc_event *evt; 3709 3710 evt = ibmvfc_get_event(vhost); 3711 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 3712 3713 mad = &evt->iu.npiv_logout; 3714 memset(mad, 0, sizeof(*mad)); 3715 mad->common.version = 1; 3716 mad->common.opcode = IBMVFC_NPIV_LOGOUT; 3717 mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad); 3718 3719 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 3720 3721 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3722 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 3723 else 3724 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3725} 3726 3727/** 3728 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 3729 * @vhost: ibmvfc host struct 3730 * 3731 * Returns: 3732 * 1 if work to do / 0 if not 3733 **/ 3734static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 3735{ 3736 struct ibmvfc_target *tgt; 3737 3738 list_for_each_entry(tgt, &vhost->targets, queue) { 3739 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 3740 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 3741 return 1; 3742 } 3743 3744 return 0; 3745} 3746 3747/** 3748 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 3749 * @vhost: ibmvfc host struct 3750 * 3751 * Returns: 3752 * 1 if work to do / 0 if not 3753 **/ 3754static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 3755{ 3756 struct ibmvfc_target *tgt; 3757 3758 if (kthread_should_stop()) 3759 return 1; 3760 switch (vhost->action) { 3761 case IBMVFC_HOST_ACTION_NONE: 3762 case IBMVFC_HOST_ACTION_INIT_WAIT: 3763 case IBMVFC_HOST_ACTION_LOGO_WAIT: 3764 return 0; 3765 case IBMVFC_HOST_ACTION_TGT_INIT: 3766 case IBMVFC_HOST_ACTION_QUERY_TGTS: 3767 if (vhost->discovery_threads == disc_threads) 3768 return 0; 3769 list_for_each_entry(tgt, &vhost->targets, queue) 3770 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 3771 return 1; 3772 list_for_each_entry(tgt, &vhost->targets, queue) 3773 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 3774 return 0; 3775 return 1; 3776 case IBMVFC_HOST_ACTION_LOGO: 3777 case IBMVFC_HOST_ACTION_INIT: 3778 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 3779 case IBMVFC_HOST_ACTION_TGT_DEL: 3780 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 3781 case IBMVFC_HOST_ACTION_QUERY: 3782 default: 3783 break; 3784 }; 3785 3786 return 1; 3787} 3788 3789/** 3790 * ibmvfc_work_to_do - Is there task level work to do? 3791 * @vhost: ibmvfc host struct 3792 * 3793 * Returns: 3794 * 1 if work to do / 0 if not 3795 **/ 3796static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 3797{ 3798 unsigned long flags; 3799 int rc; 3800 3801 spin_lock_irqsave(vhost->host->host_lock, flags); 3802 rc = __ibmvfc_work_to_do(vhost); 3803 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3804 return rc; 3805} 3806 3807/** 3808 * ibmvfc_log_ae - Log async events if necessary 3809 * @vhost: ibmvfc host struct 3810 * @events: events to log 3811 * 3812 **/ 3813static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 3814{ 3815 if (events & IBMVFC_AE_RSCN) 3816 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 3817 if ((events & IBMVFC_AE_LINKDOWN) && 3818 vhost->state >= IBMVFC_HALTED) 3819 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 3820 if ((events & IBMVFC_AE_LINKUP) && 3821 vhost->state == IBMVFC_INITIALIZING) 3822 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 3823} 3824 3825/** 3826 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 3827 * @tgt: ibmvfc target struct 3828 * 3829 **/ 3830static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 3831{ 3832 struct ibmvfc_host *vhost = tgt->vhost; 3833 struct fc_rport *rport; 3834 unsigned long flags; 3835 3836 tgt_dbg(tgt, "Adding rport\n"); 3837 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 3838 spin_lock_irqsave(vhost->host->host_lock, flags); 3839 3840 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 3841 tgt_dbg(tgt, "Deleting rport\n"); 3842 list_del(&tgt->queue); 3843 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3844 fc_remote_port_delete(rport); 3845 del_timer_sync(&tgt->timer); 3846 kref_put(&tgt->kref, ibmvfc_release_tgt); 3847 return; 3848 } 3849 3850 if (rport) { 3851 tgt_dbg(tgt, "rport add succeeded\n"); 3852 tgt->rport = rport; 3853 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; 3854 rport->supported_classes = 0; 3855 tgt->target_id = rport->scsi_target_id; 3856 if (tgt->service_parms.class1_parms[0] & 0x80000000) 3857 rport->supported_classes |= FC_COS_CLASS1; 3858 if (tgt->service_parms.class2_parms[0] & 0x80000000) 3859 rport->supported_classes |= FC_COS_CLASS2; 3860 if (tgt->service_parms.class3_parms[0] & 0x80000000) 3861 rport->supported_classes |= FC_COS_CLASS3; 3862 } else 3863 tgt_dbg(tgt, "rport add failed\n"); 3864 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3865} 3866 3867/** 3868 * ibmvfc_do_work - Do task level work 3869 * @vhost: ibmvfc host struct 3870 * 3871 **/ 3872static void ibmvfc_do_work(struct ibmvfc_host *vhost) 3873{ 3874 struct ibmvfc_target *tgt; 3875 unsigned long flags; 3876 struct fc_rport *rport; 3877 3878 ibmvfc_log_ae(vhost, vhost->events_to_log); 3879 spin_lock_irqsave(vhost->host->host_lock, flags); 3880 vhost->events_to_log = 0; 3881 switch (vhost->action) { 3882 case IBMVFC_HOST_ACTION_NONE: 3883 case IBMVFC_HOST_ACTION_LOGO_WAIT: 3884 case IBMVFC_HOST_ACTION_INIT_WAIT: 3885 break; 3886 case IBMVFC_HOST_ACTION_LOGO: 3887 vhost->job_step(vhost); 3888 break; 3889 case IBMVFC_HOST_ACTION_INIT: 3890 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 3891 if (vhost->delay_init) { 3892 vhost->delay_init = 0; 3893 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3894 ssleep(15); 3895 return; 3896 } else 3897 vhost->job_step(vhost); 3898 break; 3899 case IBMVFC_HOST_ACTION_QUERY: 3900 list_for_each_entry(tgt, &vhost->targets, queue) 3901 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 3902 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 3903 break; 3904 case IBMVFC_HOST_ACTION_QUERY_TGTS: 3905 list_for_each_entry(tgt, &vhost->targets, queue) { 3906 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 3907 tgt->job_step(tgt); 3908 break; 3909 } 3910 } 3911 3912 if (!ibmvfc_dev_init_to_do(vhost)) 3913 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 3914 break; 3915 case IBMVFC_HOST_ACTION_TGT_DEL: 3916 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 3917 list_for_each_entry(tgt, &vhost->targets, queue) { 3918 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 3919 tgt_dbg(tgt, "Deleting rport\n"); 3920 rport = tgt->rport; 3921 tgt->rport = NULL; 3922 list_del(&tgt->queue); 3923 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3924 if (rport) 3925 fc_remote_port_delete(rport); 3926 del_timer_sync(&tgt->timer); 3927 kref_put(&tgt->kref, ibmvfc_release_tgt); 3928 return; 3929 } 3930 } 3931 3932 if (vhost->state == IBMVFC_INITIALIZING) { 3933 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 3934 if (vhost->reinit) { 3935 vhost->reinit = 0; 3936 scsi_block_requests(vhost->host); 3937 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 3938 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3939 } else { 3940 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 3941 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3942 wake_up(&vhost->init_wait_q); 3943 schedule_work(&vhost->rport_add_work_q); 3944 vhost->init_retries = 0; 3945 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3946 scsi_unblock_requests(vhost->host); 3947 } 3948 3949 return; 3950 } else { 3951 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 3952 vhost->job_step = ibmvfc_discover_targets; 3953 } 3954 } else { 3955 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3956 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3957 scsi_unblock_requests(vhost->host); 3958 wake_up(&vhost->init_wait_q); 3959 return; 3960 } 3961 break; 3962 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 3963 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 3964 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3965 ibmvfc_alloc_targets(vhost); 3966 spin_lock_irqsave(vhost->host->host_lock, flags); 3967 break; 3968 case IBMVFC_HOST_ACTION_TGT_INIT: 3969 list_for_each_entry(tgt, &vhost->targets, queue) { 3970 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 3971 tgt->job_step(tgt); 3972 break; 3973 } 3974 } 3975 3976 if (!ibmvfc_dev_init_to_do(vhost)) 3977 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 3978 break; 3979 default: 3980 break; 3981 }; 3982 3983 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3984} 3985 3986/** 3987 * ibmvfc_work - Do task level work 3988 * @data: ibmvfc host struct 3989 * 3990 * Returns: 3991 * zero 3992 **/ 3993static int ibmvfc_work(void *data) 3994{ 3995 struct ibmvfc_host *vhost = data; 3996 int rc; 3997 3998 set_user_nice(current, -20); 3999 4000 while (1) { 4001 rc = wait_event_interruptible(vhost->work_wait_q, 4002 ibmvfc_work_to_do(vhost)); 4003 4004 BUG_ON(rc); 4005 4006 if (kthread_should_stop()) 4007 break; 4008 4009 ibmvfc_do_work(vhost); 4010 } 4011 4012 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4013 return 0; 4014} 4015 4016/** 4017 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4018 * @vhost: ibmvfc host struct 4019 * 4020 * Allocates a page for messages, maps it for dma, and registers 4021 * the crq with the hypervisor. 4022 * 4023 * Return value: 4024 * zero on success / other on failure 4025 **/ 4026static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4027{ 4028 int rc, retrc = -ENOMEM; 4029 struct device *dev = vhost->dev; 4030 struct vio_dev *vdev = to_vio_dev(dev); 4031 struct ibmvfc_crq_queue *crq = &vhost->crq; 4032 4033 ENTER; 4034 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4035 4036 if (!crq->msgs) 4037 return -ENOMEM; 4038 4039 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4040 crq->msg_token = dma_map_single(dev, crq->msgs, 4041 PAGE_SIZE, DMA_BIDIRECTIONAL); 4042 4043 if (dma_mapping_error(dev, crq->msg_token)) 4044 goto map_failed; 4045 4046 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4047 crq->msg_token, PAGE_SIZE); 4048 4049 if (rc == H_RESOURCE) 4050 /* maybe kexecing and resource is busy. try a reset */ 4051 retrc = rc = ibmvfc_reset_crq(vhost); 4052 4053 if (rc == H_CLOSED) 4054 dev_warn(dev, "Partner adapter not ready\n"); 4055 else if (rc) { 4056 dev_warn(dev, "Error %d opening adapter\n", rc); 4057 goto reg_crq_failed; 4058 } 4059 4060 retrc = 0; 4061 4062 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4063 4064 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4065 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4066 goto req_irq_failed; 4067 } 4068 4069 if ((rc = vio_enable_interrupts(vdev))) { 4070 dev_err(dev, "Error %d enabling interrupts\n", rc); 4071 goto req_irq_failed; 4072 } 4073 4074 crq->cur = 0; 4075 LEAVE; 4076 return retrc; 4077 4078req_irq_failed: 4079 tasklet_kill(&vhost->tasklet); 4080 do { 4081 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4082 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4083reg_crq_failed: 4084 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4085map_failed: 4086 free_page((unsigned long)crq->msgs); 4087 return retrc; 4088} 4089 4090/** 4091 * ibmvfc_free_mem - Free memory for vhost 4092 * @vhost: ibmvfc host struct 4093 * 4094 * Return value: 4095 * none 4096 **/ 4097static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4098{ 4099 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4100 4101 ENTER; 4102 mempool_destroy(vhost->tgt_pool); 4103 kfree(vhost->trace); 4104 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4105 vhost->disc_buf_dma); 4106 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4107 vhost->login_buf, vhost->login_buf_dma); 4108 dma_pool_destroy(vhost->sg_pool); 4109 dma_unmap_single(vhost->dev, async_q->msg_token, 4110 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4111 free_page((unsigned long)async_q->msgs); 4112 LEAVE; 4113} 4114 4115/** 4116 * ibmvfc_alloc_mem - Allocate memory for vhost 4117 * @vhost: ibmvfc host struct 4118 * 4119 * Return value: 4120 * 0 on success / non-zero on failure 4121 **/ 4122static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4123{ 4124 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4125 struct device *dev = vhost->dev; 4126 4127 ENTER; 4128 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4129 if (!async_q->msgs) { 4130 dev_err(dev, "Couldn't allocate async queue.\n"); 4131 goto nomem; 4132 } 4133 4134 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4135 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4136 async_q->size * sizeof(*async_q->msgs), 4137 DMA_BIDIRECTIONAL); 4138 4139 if (dma_mapping_error(dev, async_q->msg_token)) { 4140 dev_err(dev, "Failed to map async queue\n"); 4141 goto free_async_crq; 4142 } 4143 4144 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4145 SG_ALL * sizeof(struct srp_direct_buf), 4146 sizeof(struct srp_direct_buf), 0); 4147 4148 if (!vhost->sg_pool) { 4149 dev_err(dev, "Failed to allocate sg pool\n"); 4150 goto unmap_async_crq; 4151 } 4152 4153 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4154 &vhost->login_buf_dma, GFP_KERNEL); 4155 4156 if (!vhost->login_buf) { 4157 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4158 goto free_sg_pool; 4159 } 4160 4161 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4162 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4163 &vhost->disc_buf_dma, GFP_KERNEL); 4164 4165 if (!vhost->disc_buf) { 4166 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4167 goto free_login_buffer; 4168 } 4169 4170 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4171 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4172 4173 if (!vhost->trace) 4174 goto free_disc_buffer; 4175 4176 vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4177 sizeof(struct ibmvfc_target)); 4178 4179 if (!vhost->tgt_pool) { 4180 dev_err(dev, "Couldn't allocate target memory pool\n"); 4181 goto free_trace; 4182 } 4183 4184 LEAVE; 4185 return 0; 4186 4187free_trace: 4188 kfree(vhost->trace); 4189free_disc_buffer: 4190 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4191 vhost->disc_buf_dma); 4192free_login_buffer: 4193 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4194 vhost->login_buf, vhost->login_buf_dma); 4195free_sg_pool: 4196 dma_pool_destroy(vhost->sg_pool); 4197unmap_async_crq: 4198 dma_unmap_single(dev, async_q->msg_token, 4199 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4200free_async_crq: 4201 free_page((unsigned long)async_q->msgs); 4202nomem: 4203 LEAVE; 4204 return -ENOMEM; 4205} 4206 4207/** 4208 * ibmvfc_rport_add_thread - Worker thread for rport adds 4209 * @work: work struct 4210 * 4211 **/ 4212static void ibmvfc_rport_add_thread(struct work_struct *work) 4213{ 4214 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4215 rport_add_work_q); 4216 struct ibmvfc_target *tgt; 4217 struct fc_rport *rport; 4218 unsigned long flags; 4219 int did_work; 4220 4221 ENTER; 4222 spin_lock_irqsave(vhost->host->host_lock, flags); 4223 do { 4224 did_work = 0; 4225 if (vhost->state != IBMVFC_ACTIVE) 4226 break; 4227 4228 list_for_each_entry(tgt, &vhost->targets, queue) { 4229 if (tgt->add_rport) { 4230 did_work = 1; 4231 tgt->add_rport = 0; 4232 kref_get(&tgt->kref); 4233 rport = tgt->rport; 4234 if (!rport) { 4235 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4236 ibmvfc_tgt_add_rport(tgt); 4237 } else if (get_device(&rport->dev)) { 4238 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4239 tgt_dbg(tgt, "Setting rport roles\n"); 4240 fc_remote_port_rolechg(rport, tgt->ids.roles); 4241 put_device(&rport->dev); 4242 } 4243 4244 kref_put(&tgt->kref, ibmvfc_release_tgt); 4245 spin_lock_irqsave(vhost->host->host_lock, flags); 4246 break; 4247 } 4248 } 4249 } while(did_work); 4250 4251 if (vhost->state == IBMVFC_ACTIVE) 4252 vhost->scan_complete = 1; 4253 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4254 LEAVE; 4255} 4256 4257/** 4258 * ibmvfc_probe - Adapter hot plug add entry point 4259 * @vdev: vio device struct 4260 * @id: vio device id struct 4261 * 4262 * Return value: 4263 * 0 on success / non-zero on failure 4264 **/ 4265static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4266{ 4267 struct ibmvfc_host *vhost; 4268 struct Scsi_Host *shost; 4269 struct device *dev = &vdev->dev; 4270 int rc = -ENOMEM; 4271 4272 ENTER; 4273 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4274 if (!shost) { 4275 dev_err(dev, "Couldn't allocate host data\n"); 4276 goto out; 4277 } 4278 4279 shost->transportt = ibmvfc_transport_template; 4280 shost->can_queue = max_requests; 4281 shost->max_lun = max_lun; 4282 shost->max_id = max_targets; 4283 shost->max_sectors = IBMVFC_MAX_SECTORS; 4284 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4285 shost->unique_id = shost->host_no; 4286 4287 vhost = shost_priv(shost); 4288 INIT_LIST_HEAD(&vhost->sent); 4289 INIT_LIST_HEAD(&vhost->free); 4290 INIT_LIST_HEAD(&vhost->targets); 4291 sprintf(vhost->name, IBMVFC_NAME); 4292 vhost->host = shost; 4293 vhost->dev = dev; 4294 vhost->partition_number = -1; 4295 vhost->log_level = log_level; 4296 vhost->task_set = 1; 4297 strcpy(vhost->partition_name, "UNKNOWN"); 4298 init_waitqueue_head(&vhost->work_wait_q); 4299 init_waitqueue_head(&vhost->init_wait_q); 4300 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4301 4302 if ((rc = ibmvfc_alloc_mem(vhost))) 4303 goto free_scsi_host; 4304 4305 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4306 shost->host_no); 4307 4308 if (IS_ERR(vhost->work_thread)) { 4309 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4310 PTR_ERR(vhost->work_thread)); 4311 goto free_host_mem; 4312 } 4313 4314 if ((rc = ibmvfc_init_crq(vhost))) { 4315 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4316 goto kill_kthread; 4317 } 4318 4319 if ((rc = ibmvfc_init_event_pool(vhost))) { 4320 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4321 goto release_crq; 4322 } 4323 4324 if ((rc = scsi_add_host(shost, dev))) 4325 goto release_event_pool; 4326 4327 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4328 &ibmvfc_trace_attr))) { 4329 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4330 goto remove_shost; 4331 } 4332 4333 dev_set_drvdata(dev, vhost); 4334 spin_lock(&ibmvfc_driver_lock); 4335 list_add_tail(&vhost->queue, &ibmvfc_head); 4336 spin_unlock(&ibmvfc_driver_lock); 4337 4338 ibmvfc_send_crq_init(vhost); 4339 scsi_scan_host(shost); 4340 return 0; 4341 4342remove_shost: 4343 scsi_remove_host(shost); 4344release_event_pool: 4345 ibmvfc_free_event_pool(vhost); 4346release_crq: 4347 ibmvfc_release_crq_queue(vhost); 4348kill_kthread: 4349 kthread_stop(vhost->work_thread); 4350free_host_mem: 4351 ibmvfc_free_mem(vhost); 4352free_scsi_host: 4353 scsi_host_put(shost); 4354out: 4355 LEAVE; 4356 return rc; 4357} 4358 4359/** 4360 * ibmvfc_remove - Adapter hot plug remove entry point 4361 * @vdev: vio device struct 4362 * 4363 * Return value: 4364 * 0 4365 **/ 4366static int ibmvfc_remove(struct vio_dev *vdev) 4367{ 4368 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4369 unsigned long flags; 4370 4371 ENTER; 4372 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4373 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4374 ibmvfc_wait_while_resetting(vhost); 4375 ibmvfc_release_crq_queue(vhost); 4376 kthread_stop(vhost->work_thread); 4377 fc_remove_host(vhost->host); 4378 scsi_remove_host(vhost->host); 4379 4380 spin_lock_irqsave(vhost->host->host_lock, flags); 4381 ibmvfc_purge_requests(vhost, DID_ERROR); 4382 ibmvfc_free_event_pool(vhost); 4383 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4384 4385 ibmvfc_free_mem(vhost); 4386 spin_lock(&ibmvfc_driver_lock); 4387 list_del(&vhost->queue); 4388 spin_unlock(&ibmvfc_driver_lock); 4389 scsi_host_put(vhost->host); 4390 LEAVE; 4391 return 0; 4392} 4393 4394/** 4395 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4396 * @vdev: vio device struct 4397 * 4398 * Return value: 4399 * Number of bytes the driver will need to DMA map at the same time in 4400 * order to perform well. 4401 */ 4402static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4403{ 4404 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4405 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4406} 4407 4408static struct vio_device_id ibmvfc_device_table[] __devinitdata = { 4409 {"fcp", "IBM,vfc-client"}, 4410 { "", "" } 4411}; 4412MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4413 4414static struct vio_driver ibmvfc_driver = { 4415 .id_table = ibmvfc_device_table, 4416 .probe = ibmvfc_probe, 4417 .remove = ibmvfc_remove, 4418 .get_desired_dma = ibmvfc_get_desired_dma, 4419 .driver = { 4420 .name = IBMVFC_NAME, 4421 .owner = THIS_MODULE, 4422 } 4423}; 4424 4425static struct fc_function_template ibmvfc_transport_functions = { 4426 .show_host_fabric_name = 1, 4427 .show_host_node_name = 1, 4428 .show_host_port_name = 1, 4429 .show_host_supported_classes = 1, 4430 .show_host_port_type = 1, 4431 .show_host_port_id = 1, 4432 .show_host_maxframe_size = 1, 4433 4434 .get_host_port_state = ibmvfc_get_host_port_state, 4435 .show_host_port_state = 1, 4436 4437 .get_host_speed = ibmvfc_get_host_speed, 4438 .show_host_speed = 1, 4439 4440 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4441 .terminate_rport_io = ibmvfc_terminate_rport_io, 4442 4443 .show_rport_maxframe_size = 1, 4444 .show_rport_supported_classes = 1, 4445 4446 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4447 .show_rport_dev_loss_tmo = 1, 4448 4449 .get_starget_node_name = ibmvfc_get_starget_node_name, 4450 .show_starget_node_name = 1, 4451 4452 .get_starget_port_name = ibmvfc_get_starget_port_name, 4453 .show_starget_port_name = 1, 4454 4455 .get_starget_port_id = ibmvfc_get_starget_port_id, 4456 .show_starget_port_id = 1, 4457}; 4458 4459/** 4460 * ibmvfc_module_init - Initialize the ibmvfc module 4461 * 4462 * Return value: 4463 * 0 on success / other on failure 4464 **/ 4465static int __init ibmvfc_module_init(void) 4466{ 4467 int rc; 4468 4469 if (!firmware_has_feature(FW_FEATURE_VIO)) 4470 return -ENODEV; 4471 4472 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4473 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4474 4475 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4476 if (!ibmvfc_transport_template) 4477 return -ENOMEM; 4478 4479 rc = vio_register_driver(&ibmvfc_driver); 4480 if (rc) 4481 fc_release_transport(ibmvfc_transport_template); 4482 return rc; 4483} 4484 4485/** 4486 * ibmvfc_module_exit - Teardown the ibmvfc module 4487 * 4488 * Return value: 4489 * nothing 4490 **/ 4491static void __exit ibmvfc_module_exit(void) 4492{ 4493 vio_unregister_driver(&ibmvfc_driver); 4494 fc_release_transport(ibmvfc_transport_template); 4495} 4496 4497module_init(ibmvfc_module_init); 4498module_exit(ibmvfc_module_exit); 4499