ibmvfc.c revision 79111d0899a122fa3cf0a2921292c3e6a25452d0
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, 0, 0, "link halted" }, 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 115 116 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 117 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 118 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 119 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 120 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 121 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 122 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 123 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 124 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 125 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 126 127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 128 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 129 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 131 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 132 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 133 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 134 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 135 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 136 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 137 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 138 139 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 140}; 141 142static void ibmvfc_npiv_login(struct ibmvfc_host *); 143static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 144static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 145static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 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 if (vhost->client_migrated) 1173 login_info->flags = IBMVFC_CLIENT_MIGRATED; 1174 1175 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1176 login_info->capabilities = IBMVFC_CAN_MIGRATE; 1177 login_info->async.va = vhost->async_crq.msg_token; 1178 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); 1179 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1180 strncpy(login_info->device_name, 1181 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1182 1183 location = of_get_property(of_node, "ibm,loc-code", NULL); 1184 location = location ? location : dev_name(vhost->dev); 1185 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1186} 1187 1188/** 1189 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1190 * @vhost: ibmvfc host who owns the event pool 1191 * 1192 * Returns zero on success. 1193 **/ 1194static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1195{ 1196 int i; 1197 struct ibmvfc_event_pool *pool = &vhost->pool; 1198 1199 ENTER; 1200 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1201 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1202 if (!pool->events) 1203 return -ENOMEM; 1204 1205 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1206 pool->size * sizeof(*pool->iu_storage), 1207 &pool->iu_token, 0); 1208 1209 if (!pool->iu_storage) { 1210 kfree(pool->events); 1211 return -ENOMEM; 1212 } 1213 1214 for (i = 0; i < pool->size; ++i) { 1215 struct ibmvfc_event *evt = &pool->events[i]; 1216 atomic_set(&evt->free, 1); 1217 evt->crq.valid = 0x80; 1218 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); 1219 evt->xfer_iu = pool->iu_storage + i; 1220 evt->vhost = vhost; 1221 evt->ext_list = NULL; 1222 list_add_tail(&evt->queue, &vhost->free); 1223 } 1224 1225 LEAVE; 1226 return 0; 1227} 1228 1229/** 1230 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1231 * @vhost: ibmvfc host who owns the event pool 1232 * 1233 **/ 1234static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1235{ 1236 int i; 1237 struct ibmvfc_event_pool *pool = &vhost->pool; 1238 1239 ENTER; 1240 for (i = 0; i < pool->size; ++i) { 1241 list_del(&pool->events[i].queue); 1242 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1243 if (pool->events[i].ext_list) 1244 dma_pool_free(vhost->sg_pool, 1245 pool->events[i].ext_list, 1246 pool->events[i].ext_list_token); 1247 } 1248 1249 kfree(pool->events); 1250 dma_free_coherent(vhost->dev, 1251 pool->size * sizeof(*pool->iu_storage), 1252 pool->iu_storage, pool->iu_token); 1253 LEAVE; 1254} 1255 1256/** 1257 * ibmvfc_get_event - Gets the next free event in pool 1258 * @vhost: ibmvfc host struct 1259 * 1260 * Returns a free event from the pool. 1261 **/ 1262static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1263{ 1264 struct ibmvfc_event *evt; 1265 1266 BUG_ON(list_empty(&vhost->free)); 1267 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1268 atomic_set(&evt->free, 0); 1269 list_del(&evt->queue); 1270 return evt; 1271} 1272 1273/** 1274 * ibmvfc_init_event - Initialize fields in an event struct that are always 1275 * required. 1276 * @evt: The event 1277 * @done: Routine to call when the event is responded to 1278 * @format: SRP or MAD format 1279 **/ 1280static void ibmvfc_init_event(struct ibmvfc_event *evt, 1281 void (*done) (struct ibmvfc_event *), u8 format) 1282{ 1283 evt->cmnd = NULL; 1284 evt->sync_iu = NULL; 1285 evt->crq.format = format; 1286 evt->done = done; 1287 evt->eh_comp = NULL; 1288} 1289 1290/** 1291 * ibmvfc_map_sg_list - Initialize scatterlist 1292 * @scmd: scsi command struct 1293 * @nseg: number of scatterlist segments 1294 * @md: memory descriptor list to initialize 1295 **/ 1296static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1297 struct srp_direct_buf *md) 1298{ 1299 int i; 1300 struct scatterlist *sg; 1301 1302 scsi_for_each_sg(scmd, sg, nseg, i) { 1303 md[i].va = sg_dma_address(sg); 1304 md[i].len = sg_dma_len(sg); 1305 md[i].key = 0; 1306 } 1307} 1308 1309/** 1310 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1311 * @scmd: Scsi_Cmnd with the scatterlist 1312 * @evt: ibmvfc event struct 1313 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1314 * @dev: device for which to map dma memory 1315 * 1316 * Returns: 1317 * 0 on success / non-zero on failure 1318 **/ 1319static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1320 struct ibmvfc_event *evt, 1321 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1322{ 1323 1324 int sg_mapped; 1325 struct srp_direct_buf *data = &vfc_cmd->ioba; 1326 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1327 1328 sg_mapped = scsi_dma_map(scmd); 1329 if (!sg_mapped) { 1330 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; 1331 return 0; 1332 } else if (unlikely(sg_mapped < 0)) { 1333 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1334 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1335 return sg_mapped; 1336 } 1337 1338 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1339 vfc_cmd->flags |= IBMVFC_WRITE; 1340 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1341 } else { 1342 vfc_cmd->flags |= IBMVFC_READ; 1343 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1344 } 1345 1346 if (sg_mapped == 1) { 1347 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1348 return 0; 1349 } 1350 1351 vfc_cmd->flags |= IBMVFC_SCATTERLIST; 1352 1353 if (!evt->ext_list) { 1354 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1355 &evt->ext_list_token); 1356 1357 if (!evt->ext_list) { 1358 scsi_dma_unmap(scmd); 1359 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1360 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1361 return -ENOMEM; 1362 } 1363 } 1364 1365 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1366 1367 data->va = evt->ext_list_token; 1368 data->len = sg_mapped * sizeof(struct srp_direct_buf); 1369 data->key = 0; 1370 return 0; 1371} 1372 1373/** 1374 * ibmvfc_timeout - Internal command timeout handler 1375 * @evt: struct ibmvfc_event that timed out 1376 * 1377 * Called when an internally generated command times out 1378 **/ 1379static void ibmvfc_timeout(struct ibmvfc_event *evt) 1380{ 1381 struct ibmvfc_host *vhost = evt->vhost; 1382 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1383 ibmvfc_reset_host(vhost); 1384} 1385 1386/** 1387 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1388 * @evt: event to be sent 1389 * @vhost: ibmvfc host struct 1390 * @timeout: timeout in seconds - 0 means do not time command 1391 * 1392 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1393 **/ 1394static int ibmvfc_send_event(struct ibmvfc_event *evt, 1395 struct ibmvfc_host *vhost, unsigned long timeout) 1396{ 1397 u64 *crq_as_u64 = (u64 *) &evt->crq; 1398 int rc; 1399 1400 /* Copy the IU into the transfer area */ 1401 *evt->xfer_iu = evt->iu; 1402 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1403 evt->xfer_iu->cmd.tag = (u64)evt; 1404 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1405 evt->xfer_iu->mad_common.tag = (u64)evt; 1406 else 1407 BUG(); 1408 1409 list_add_tail(&evt->queue, &vhost->sent); 1410 init_timer(&evt->timer); 1411 1412 if (timeout) { 1413 evt->timer.data = (unsigned long) evt; 1414 evt->timer.expires = jiffies + (timeout * HZ); 1415 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; 1416 add_timer(&evt->timer); 1417 } 1418 1419 mb(); 1420 1421 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { 1422 list_del(&evt->queue); 1423 del_timer(&evt->timer); 1424 1425 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1426 * Firmware will send a CRQ with a transport event (0xFF) to 1427 * tell this client what has happened to the transport. This 1428 * will be handled in ibmvfc_handle_crq() 1429 */ 1430 if (rc == H_CLOSED) { 1431 if (printk_ratelimit()) 1432 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1433 if (evt->cmnd) 1434 scsi_dma_unmap(evt->cmnd); 1435 ibmvfc_free_event(evt); 1436 return SCSI_MLQUEUE_HOST_BUSY; 1437 } 1438 1439 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1440 if (evt->cmnd) { 1441 evt->cmnd->result = DID_ERROR << 16; 1442 evt->done = ibmvfc_scsi_eh_done; 1443 } else 1444 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; 1445 1446 evt->done(evt); 1447 } else 1448 ibmvfc_trc_start(evt); 1449 1450 return 0; 1451} 1452 1453/** 1454 * ibmvfc_log_error - Log an error for the failed command if appropriate 1455 * @evt: ibmvfc event to log 1456 * 1457 **/ 1458static void ibmvfc_log_error(struct ibmvfc_event *evt) 1459{ 1460 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1461 struct ibmvfc_host *vhost = evt->vhost; 1462 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1463 struct scsi_cmnd *cmnd = evt->cmnd; 1464 const char *err = unknown_error; 1465 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 1466 int logerr = 0; 1467 int rsp_code = 0; 1468 1469 if (index >= 0) { 1470 logerr = cmd_status[index].log; 1471 err = cmd_status[index].name; 1472 } 1473 1474 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1475 return; 1476 1477 if (rsp->flags & FCP_RSP_LEN_VALID) 1478 rsp_code = rsp->data.info.rsp_code; 1479 1480 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1481 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1482 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1483 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1484} 1485 1486/** 1487 * ibmvfc_scsi_done - Handle responses from commands 1488 * @evt: ibmvfc event to be handled 1489 * 1490 * Used as a callback when sending scsi cmds. 1491 **/ 1492static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1493{ 1494 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1495 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1496 struct scsi_cmnd *cmnd = evt->cmnd; 1497 u32 rsp_len = 0; 1498 u32 sense_len = rsp->fcp_sense_len; 1499 1500 if (cmnd) { 1501 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) 1502 scsi_set_resid(cmnd, vfc_cmd->adapter_resid); 1503 else if (rsp->flags & FCP_RESID_UNDER) 1504 scsi_set_resid(cmnd, rsp->fcp_resid); 1505 else 1506 scsi_set_resid(cmnd, 0); 1507 1508 if (vfc_cmd->status) { 1509 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1510 1511 if (rsp->flags & FCP_RSP_LEN_VALID) 1512 rsp_len = rsp->fcp_rsp_len; 1513 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1514 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1515 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1516 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1517 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED)) 1518 ibmvfc_reinit_host(evt->vhost); 1519 1520 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1521 cmnd->result = (DID_ERROR << 16); 1522 1523 ibmvfc_log_error(evt); 1524 } 1525 1526 if (!cmnd->result && 1527 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1528 cmnd->result = (DID_ERROR << 16); 1529 1530 scsi_dma_unmap(cmnd); 1531 cmnd->scsi_done(cmnd); 1532 } 1533 1534 if (evt->eh_comp) 1535 complete(evt->eh_comp); 1536 1537 ibmvfc_free_event(evt); 1538} 1539 1540/** 1541 * ibmvfc_host_chkready - Check if the host can accept commands 1542 * @vhost: struct ibmvfc host 1543 * 1544 * Returns: 1545 * 1 if host can accept command / 0 if not 1546 **/ 1547static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1548{ 1549 int result = 0; 1550 1551 switch (vhost->state) { 1552 case IBMVFC_LINK_DEAD: 1553 case IBMVFC_HOST_OFFLINE: 1554 result = DID_NO_CONNECT << 16; 1555 break; 1556 case IBMVFC_NO_CRQ: 1557 case IBMVFC_INITIALIZING: 1558 case IBMVFC_HALTED: 1559 case IBMVFC_LINK_DOWN: 1560 result = DID_REQUEUE << 16; 1561 break; 1562 case IBMVFC_ACTIVE: 1563 result = 0; 1564 break; 1565 }; 1566 1567 return result; 1568} 1569 1570/** 1571 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1572 * @cmnd: struct scsi_cmnd to be executed 1573 * @done: Callback function to be called when cmnd is completed 1574 * 1575 * Returns: 1576 * 0 on success / other on failure 1577 **/ 1578static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, 1579 void (*done) (struct scsi_cmnd *)) 1580{ 1581 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1582 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1583 struct ibmvfc_cmd *vfc_cmd; 1584 struct ibmvfc_event *evt; 1585 u8 tag[2]; 1586 int rc; 1587 1588 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1589 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1590 cmnd->result = rc; 1591 done(cmnd); 1592 return 0; 1593 } 1594 1595 cmnd->result = (DID_OK << 16); 1596 evt = ibmvfc_get_event(vhost); 1597 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1598 evt->cmnd = cmnd; 1599 cmnd->scsi_done = done; 1600 vfc_cmd = &evt->iu.cmd; 1601 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1602 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1603 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); 1604 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; 1605 vfc_cmd->payload_len = sizeof(vfc_cmd->iu); 1606 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); 1607 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; 1608 vfc_cmd->tgt_scsi_id = rport->port_id; 1609 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); 1610 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1611 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1612 1613 if (scsi_populate_tag_msg(cmnd, tag)) { 1614 vfc_cmd->task_tag = tag[1]; 1615 switch (tag[0]) { 1616 case MSG_SIMPLE_TAG: 1617 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1618 break; 1619 case MSG_HEAD_TAG: 1620 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; 1621 break; 1622 case MSG_ORDERED_TAG: 1623 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; 1624 break; 1625 }; 1626 } 1627 1628 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1629 return ibmvfc_send_event(evt, vhost, 0); 1630 1631 ibmvfc_free_event(evt); 1632 if (rc == -ENOMEM) 1633 return SCSI_MLQUEUE_HOST_BUSY; 1634 1635 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1636 scmd_printk(KERN_ERR, cmnd, 1637 "Failed to map DMA buffer for command. rc=%d\n", rc); 1638 1639 cmnd->result = DID_ERROR << 16; 1640 done(cmnd); 1641 return 0; 1642} 1643 1644/** 1645 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1646 * @evt: ibmvfc event struct 1647 * 1648 **/ 1649static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1650{ 1651 /* copy the response back */ 1652 if (evt->sync_iu) 1653 *evt->sync_iu = *evt->xfer_iu; 1654 1655 complete(&evt->comp); 1656} 1657 1658/** 1659 * ibmvfc_reset_device - Reset the device with the specified reset type 1660 * @sdev: scsi device to reset 1661 * @type: reset type 1662 * @desc: reset type description for log messages 1663 * 1664 * Returns: 1665 * 0 on success / other on failure 1666 **/ 1667static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1668{ 1669 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1670 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1671 struct ibmvfc_cmd *tmf; 1672 struct ibmvfc_event *evt = NULL; 1673 union ibmvfc_iu rsp_iu; 1674 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1675 int rsp_rc = -EBUSY; 1676 unsigned long flags; 1677 int rsp_code = 0; 1678 1679 spin_lock_irqsave(vhost->host->host_lock, flags); 1680 if (vhost->state == IBMVFC_ACTIVE) { 1681 evt = ibmvfc_get_event(vhost); 1682 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1683 1684 tmf = &evt->iu.cmd; 1685 memset(tmf, 0, sizeof(*tmf)); 1686 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1687 tmf->resp.len = sizeof(tmf->rsp); 1688 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1689 tmf->payload_len = sizeof(tmf->iu); 1690 tmf->resp_len = sizeof(tmf->rsp); 1691 tmf->cancel_key = (unsigned long)sdev->hostdata; 1692 tmf->tgt_scsi_id = rport->port_id; 1693 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1694 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1695 tmf->iu.tmf_flags = type; 1696 evt->sync_iu = &rsp_iu; 1697 1698 init_completion(&evt->comp); 1699 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1700 } 1701 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1702 1703 if (rsp_rc != 0) { 1704 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 1705 desc, rsp_rc); 1706 return -EIO; 1707 } 1708 1709 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 1710 wait_for_completion(&evt->comp); 1711 1712 if (rsp_iu.cmd.status) { 1713 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 1714 rsp_code = fc_rsp->data.info.rsp_code; 1715 1716 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 1717 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 1718 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 1719 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 1720 fc_rsp->scsi_status); 1721 rsp_rc = -EIO; 1722 } else 1723 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 1724 1725 spin_lock_irqsave(vhost->host->host_lock, flags); 1726 ibmvfc_free_event(evt); 1727 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1728 return rsp_rc; 1729} 1730 1731/** 1732 * ibmvfc_abort_task_set - Abort outstanding commands to the device 1733 * @sdev: scsi device to abort commands 1734 * 1735 * This sends an Abort Task Set to the VIOS for the specified device. This does 1736 * NOT send any cancel to the VIOS. That must be done separately. 1737 * 1738 * Returns: 1739 * 0 on success / other on failure 1740 **/ 1741static int ibmvfc_abort_task_set(struct scsi_device *sdev) 1742{ 1743 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1744 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1745 struct ibmvfc_cmd *tmf; 1746 struct ibmvfc_event *evt, *found_evt; 1747 union ibmvfc_iu rsp_iu; 1748 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1749 int rsp_rc = -EBUSY; 1750 unsigned long flags; 1751 int rsp_code = 0; 1752 1753 spin_lock_irqsave(vhost->host->host_lock, flags); 1754 found_evt = NULL; 1755 list_for_each_entry(evt, &vhost->sent, queue) { 1756 if (evt->cmnd && evt->cmnd->device == sdev) { 1757 found_evt = evt; 1758 break; 1759 } 1760 } 1761 1762 if (!found_evt) { 1763 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1764 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 1765 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1766 return 0; 1767 } 1768 1769 if (vhost->state == IBMVFC_ACTIVE) { 1770 evt = ibmvfc_get_event(vhost); 1771 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1772 1773 tmf = &evt->iu.cmd; 1774 memset(tmf, 0, sizeof(*tmf)); 1775 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1776 tmf->resp.len = sizeof(tmf->rsp); 1777 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1778 tmf->payload_len = sizeof(tmf->iu); 1779 tmf->resp_len = sizeof(tmf->rsp); 1780 tmf->cancel_key = (unsigned long)sdev->hostdata; 1781 tmf->tgt_scsi_id = rport->port_id; 1782 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1783 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1784 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 1785 evt->sync_iu = &rsp_iu; 1786 1787 init_completion(&evt->comp); 1788 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1789 } 1790 1791 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1792 1793 if (rsp_rc != 0) { 1794 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 1795 return -EIO; 1796 } 1797 1798 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 1799 wait_for_completion(&evt->comp); 1800 1801 if (rsp_iu.cmd.status) { 1802 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 1803 rsp_code = fc_rsp->data.info.rsp_code; 1804 1805 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 1806 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 1807 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 1808 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 1809 fc_rsp->scsi_status); 1810 rsp_rc = -EIO; 1811 } else 1812 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 1813 1814 spin_lock_irqsave(vhost->host->host_lock, flags); 1815 ibmvfc_free_event(evt); 1816 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1817 return rsp_rc; 1818} 1819 1820/** 1821 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 1822 * @sdev: scsi device to cancel commands 1823 * @type: type of error recovery being performed 1824 * 1825 * This sends a cancel to the VIOS for the specified device. This does 1826 * NOT send any abort to the actual device. That must be done separately. 1827 * 1828 * Returns: 1829 * 0 on success / other on failure 1830 **/ 1831static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 1832{ 1833 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1834 struct scsi_target *starget = scsi_target(sdev); 1835 struct fc_rport *rport = starget_to_rport(starget); 1836 struct ibmvfc_tmf *tmf; 1837 struct ibmvfc_event *evt, *found_evt; 1838 union ibmvfc_iu rsp; 1839 int rsp_rc = -EBUSY; 1840 unsigned long flags; 1841 u16 status; 1842 1843 ENTER; 1844 spin_lock_irqsave(vhost->host->host_lock, flags); 1845 found_evt = NULL; 1846 list_for_each_entry(evt, &vhost->sent, queue) { 1847 if (evt->cmnd && evt->cmnd->device == sdev) { 1848 found_evt = evt; 1849 break; 1850 } 1851 } 1852 1853 if (!found_evt) { 1854 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1855 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 1856 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1857 return 0; 1858 } 1859 1860 if (vhost->state == IBMVFC_ACTIVE) { 1861 evt = ibmvfc_get_event(vhost); 1862 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1863 1864 tmf = &evt->iu.tmf; 1865 memset(tmf, 0, sizeof(*tmf)); 1866 tmf->common.version = 1; 1867 tmf->common.opcode = IBMVFC_TMF_MAD; 1868 tmf->common.length = sizeof(*tmf); 1869 tmf->scsi_id = rport->port_id; 1870 int_to_scsilun(sdev->lun, &tmf->lun); 1871 tmf->flags = (type | IBMVFC_TMF_LUA_VALID); 1872 tmf->cancel_key = (unsigned long)sdev->hostdata; 1873 tmf->my_cancel_key = (unsigned long)starget->hostdata; 1874 1875 evt->sync_iu = &rsp; 1876 init_completion(&evt->comp); 1877 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1878 } 1879 1880 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1881 1882 if (rsp_rc != 0) { 1883 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 1884 return -EIO; 1885 } 1886 1887 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 1888 1889 wait_for_completion(&evt->comp); 1890 status = rsp.mad_common.status; 1891 spin_lock_irqsave(vhost->host->host_lock, flags); 1892 ibmvfc_free_event(evt); 1893 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1894 1895 if (status != IBMVFC_MAD_SUCCESS) { 1896 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 1897 return -EIO; 1898 } 1899 1900 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 1901 return 0; 1902} 1903 1904/** 1905 * ibmvfc_match_target - Match function for specified target 1906 * @evt: ibmvfc event struct 1907 * @device: device to match (starget) 1908 * 1909 * Returns: 1910 * 1 if event matches starget / 0 if event does not match starget 1911 **/ 1912static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 1913{ 1914 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 1915 return 1; 1916 return 0; 1917} 1918 1919/** 1920 * ibmvfc_match_lun - Match function for specified LUN 1921 * @evt: ibmvfc event struct 1922 * @device: device to match (sdev) 1923 * 1924 * Returns: 1925 * 1 if event matches sdev / 0 if event does not match sdev 1926 **/ 1927static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 1928{ 1929 if (evt->cmnd && evt->cmnd->device == device) 1930 return 1; 1931 return 0; 1932} 1933 1934/** 1935 * ibmvfc_wait_for_ops - Wait for ops to complete 1936 * @vhost: ibmvfc host struct 1937 * @device: device to match (starget or sdev) 1938 * @match: match function 1939 * 1940 * Returns: 1941 * SUCCESS / FAILED 1942 **/ 1943static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 1944 int (*match) (struct ibmvfc_event *, void *)) 1945{ 1946 struct ibmvfc_event *evt; 1947 DECLARE_COMPLETION_ONSTACK(comp); 1948 int wait; 1949 unsigned long flags; 1950 signed long timeout = init_timeout * HZ; 1951 1952 ENTER; 1953 do { 1954 wait = 0; 1955 spin_lock_irqsave(vhost->host->host_lock, flags); 1956 list_for_each_entry(evt, &vhost->sent, queue) { 1957 if (match(evt, device)) { 1958 evt->eh_comp = ∁ 1959 wait++; 1960 } 1961 } 1962 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1963 1964 if (wait) { 1965 timeout = wait_for_completion_timeout(&comp, timeout); 1966 1967 if (!timeout) { 1968 wait = 0; 1969 spin_lock_irqsave(vhost->host->host_lock, flags); 1970 list_for_each_entry(evt, &vhost->sent, queue) { 1971 if (match(evt, device)) { 1972 evt->eh_comp = NULL; 1973 wait++; 1974 } 1975 } 1976 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1977 if (wait) 1978 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 1979 LEAVE; 1980 return wait ? FAILED : SUCCESS; 1981 } 1982 } 1983 } while (wait); 1984 1985 LEAVE; 1986 return SUCCESS; 1987} 1988 1989/** 1990 * ibmvfc_eh_abort_handler - Abort a command 1991 * @cmd: scsi command to abort 1992 * 1993 * Returns: 1994 * SUCCESS / FAILED 1995 **/ 1996static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 1997{ 1998 struct scsi_device *sdev = cmd->device; 1999 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2000 int cancel_rc, abort_rc; 2001 int rc = FAILED; 2002 2003 ENTER; 2004 ibmvfc_wait_while_resetting(vhost); 2005 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2006 abort_rc = ibmvfc_abort_task_set(sdev); 2007 2008 if (!cancel_rc && !abort_rc) 2009 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2010 2011 LEAVE; 2012 return rc; 2013} 2014 2015/** 2016 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2017 * @cmd: scsi command struct 2018 * 2019 * Returns: 2020 * SUCCESS / FAILED 2021 **/ 2022static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2023{ 2024 struct scsi_device *sdev = cmd->device; 2025 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2026 int cancel_rc, reset_rc; 2027 int rc = FAILED; 2028 2029 ENTER; 2030 ibmvfc_wait_while_resetting(vhost); 2031 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2032 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2033 2034 if (!cancel_rc && !reset_rc) 2035 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2036 2037 LEAVE; 2038 return rc; 2039} 2040 2041/** 2042 * ibmvfc_dev_cancel_all - Device iterated cancel all function 2043 * @sdev: scsi device struct 2044 * @data: return code 2045 * 2046 **/ 2047static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data) 2048{ 2049 unsigned long *rc = data; 2050 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2051} 2052 2053/** 2054 * ibmvfc_dev_abort_all - Device iterated abort task set function 2055 * @sdev: scsi device struct 2056 * @data: return code 2057 * 2058 **/ 2059static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) 2060{ 2061 unsigned long *rc = data; 2062 *rc |= ibmvfc_abort_task_set(sdev); 2063} 2064 2065/** 2066 * ibmvfc_eh_target_reset_handler - Reset the target 2067 * @cmd: scsi command struct 2068 * 2069 * Returns: 2070 * SUCCESS / FAILED 2071 **/ 2072static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2073{ 2074 struct scsi_device *sdev = cmd->device; 2075 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2076 struct scsi_target *starget = scsi_target(sdev); 2077 int reset_rc; 2078 int rc = FAILED; 2079 unsigned long cancel_rc = 0; 2080 2081 ENTER; 2082 ibmvfc_wait_while_resetting(vhost); 2083 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); 2084 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2085 2086 if (!cancel_rc && !reset_rc) 2087 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2088 2089 LEAVE; 2090 return rc; 2091} 2092 2093/** 2094 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2095 * @cmd: struct scsi_cmnd having problems 2096 * 2097 **/ 2098static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2099{ 2100 int rc; 2101 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2102 2103 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2104 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2105 return rc ? FAILED : SUCCESS; 2106} 2107 2108/** 2109 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2110 * @rport: rport struct 2111 * 2112 * Return value: 2113 * none 2114 **/ 2115static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2116{ 2117 struct scsi_target *starget = to_scsi_target(&rport->dev); 2118 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2119 struct ibmvfc_host *vhost = shost_priv(shost); 2120 unsigned long cancel_rc = 0; 2121 unsigned long abort_rc = 0; 2122 int rc = FAILED; 2123 2124 ENTER; 2125 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); 2126 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); 2127 2128 if (!cancel_rc && !abort_rc) 2129 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2130 2131 if (rc == FAILED) 2132 ibmvfc_issue_fc_host_lip(shost); 2133 LEAVE; 2134} 2135 2136static const struct { 2137 enum ibmvfc_async_event ae; 2138 const char *desc; 2139} ae_desc [] = { 2140 { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, 2141 { IBMVFC_AE_ELS_LOGO, "LOGO" }, 2142 { IBMVFC_AE_ELS_PRLO, "PRLO" }, 2143 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, 2144 { IBMVFC_AE_SCN_GROUP, "Group SCN" }, 2145 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, 2146 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, 2147 { IBMVFC_AE_LINK_UP, "Link Up" }, 2148 { IBMVFC_AE_LINK_DOWN, "Link Down" }, 2149 { IBMVFC_AE_LINK_DEAD, "Link Dead" }, 2150 { IBMVFC_AE_HALT, "Halt" }, 2151 { IBMVFC_AE_RESUME, "Resume" }, 2152 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, 2153}; 2154 2155static const char *unknown_ae = "Unknown async"; 2156 2157/** 2158 * ibmvfc_get_ae_desc - Get text description for async event 2159 * @ae: async event 2160 * 2161 **/ 2162static const char *ibmvfc_get_ae_desc(u64 ae) 2163{ 2164 int i; 2165 2166 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2167 if (ae_desc[i].ae == ae) 2168 return ae_desc[i].desc; 2169 2170 return unknown_ae; 2171} 2172 2173/** 2174 * ibmvfc_handle_async - Handle an async event from the adapter 2175 * @crq: crq to process 2176 * @vhost: ibmvfc host struct 2177 * 2178 **/ 2179static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2180 struct ibmvfc_host *vhost) 2181{ 2182 const char *desc = ibmvfc_get_ae_desc(crq->event); 2183 2184 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx," 2185 " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name); 2186 2187 switch (crq->event) { 2188 case IBMVFC_AE_LINK_UP: 2189 case IBMVFC_AE_RESUME: 2190 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2191 vhost->delay_init = 1; 2192 __ibmvfc_reset_host(vhost); 2193 break; 2194 case IBMVFC_AE_SCN_FABRIC: 2195 case IBMVFC_AE_SCN_DOMAIN: 2196 vhost->events_to_log |= IBMVFC_AE_RSCN; 2197 vhost->delay_init = 1; 2198 __ibmvfc_reset_host(vhost); 2199 break; 2200 case IBMVFC_AE_SCN_NPORT: 2201 case IBMVFC_AE_SCN_GROUP: 2202 vhost->events_to_log |= IBMVFC_AE_RSCN; 2203 case IBMVFC_AE_ELS_LOGO: 2204 case IBMVFC_AE_ELS_PRLO: 2205 case IBMVFC_AE_ELS_PLOGI: 2206 ibmvfc_reinit_host(vhost); 2207 break; 2208 case IBMVFC_AE_LINK_DOWN: 2209 case IBMVFC_AE_ADAPTER_FAILED: 2210 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2211 break; 2212 case IBMVFC_AE_LINK_DEAD: 2213 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2214 break; 2215 case IBMVFC_AE_HALT: 2216 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2217 break; 2218 default: 2219 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2220 break; 2221 }; 2222} 2223 2224/** 2225 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2226 * @crq: Command/Response queue 2227 * @vhost: ibmvfc host struct 2228 * 2229 **/ 2230static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2231{ 2232 long rc; 2233 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; 2234 2235 switch (crq->valid) { 2236 case IBMVFC_CRQ_INIT_RSP: 2237 switch (crq->format) { 2238 case IBMVFC_CRQ_INIT: 2239 dev_info(vhost->dev, "Partner initialized\n"); 2240 /* Send back a response */ 2241 rc = ibmvfc_send_crq_init_complete(vhost); 2242 if (rc == 0) 2243 ibmvfc_init_host(vhost, 0); 2244 else 2245 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2246 break; 2247 case IBMVFC_CRQ_INIT_COMPLETE: 2248 dev_info(vhost->dev, "Partner initialization complete\n"); 2249 ibmvfc_init_host(vhost, 0); 2250 break; 2251 default: 2252 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2253 } 2254 return; 2255 case IBMVFC_CRQ_XPORT_EVENT: 2256 vhost->state = IBMVFC_NO_CRQ; 2257 vhost->logged_in = 0; 2258 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2259 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2260 /* We need to re-setup the interpartition connection */ 2261 dev_info(vhost->dev, "Re-enabling adapter\n"); 2262 vhost->client_migrated = 1; 2263 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2264 if ((rc = ibmvfc_reenable_crq_queue(vhost)) || 2265 (rc = ibmvfc_send_crq_init(vhost))) { 2266 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2267 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); 2268 } else 2269 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2270 } else { 2271 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2272 2273 ibmvfc_purge_requests(vhost, DID_ERROR); 2274 if ((rc = ibmvfc_reset_crq(vhost)) || 2275 (rc = ibmvfc_send_crq_init(vhost))) { 2276 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2277 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); 2278 } else 2279 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2280 } 2281 return; 2282 case IBMVFC_CRQ_CMD_RSP: 2283 break; 2284 default: 2285 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2286 return; 2287 } 2288 2289 if (crq->format == IBMVFC_ASYNC_EVENT) 2290 return; 2291 2292 /* The only kind of payload CRQs we should get are responses to 2293 * things we send. Make sure this response is to something we 2294 * actually sent 2295 */ 2296 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2297 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2298 crq->ioba); 2299 return; 2300 } 2301 2302 if (unlikely(atomic_read(&evt->free))) { 2303 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2304 crq->ioba); 2305 return; 2306 } 2307 2308 del_timer(&evt->timer); 2309 list_del(&evt->queue); 2310 ibmvfc_trc_end(evt); 2311 evt->done(evt); 2312} 2313 2314/** 2315 * ibmvfc_scan_finished - Check if the device scan is done. 2316 * @shost: scsi host struct 2317 * @time: current elapsed time 2318 * 2319 * Returns: 2320 * 0 if scan is not done / 1 if scan is done 2321 **/ 2322static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2323{ 2324 unsigned long flags; 2325 struct ibmvfc_host *vhost = shost_priv(shost); 2326 int done = 0; 2327 2328 spin_lock_irqsave(shost->host_lock, flags); 2329 if (time >= (init_timeout * HZ)) { 2330 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2331 "continuing initialization\n", init_timeout); 2332 done = 1; 2333 } 2334 2335 if (vhost->scan_complete) 2336 done = 1; 2337 spin_unlock_irqrestore(shost->host_lock, flags); 2338 return done; 2339} 2340 2341/** 2342 * ibmvfc_slave_alloc - Setup the device's task set value 2343 * @sdev: struct scsi_device device to configure 2344 * 2345 * Set the device's task set value so that error handling works as 2346 * expected. 2347 * 2348 * Returns: 2349 * 0 on success / -ENXIO if device does not exist 2350 **/ 2351static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2352{ 2353 struct Scsi_Host *shost = sdev->host; 2354 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2355 struct ibmvfc_host *vhost = shost_priv(shost); 2356 unsigned long flags = 0; 2357 2358 if (!rport || fc_remote_port_chkready(rport)) 2359 return -ENXIO; 2360 2361 spin_lock_irqsave(shost->host_lock, flags); 2362 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2363 spin_unlock_irqrestore(shost->host_lock, flags); 2364 return 0; 2365} 2366 2367/** 2368 * ibmvfc_target_alloc - Setup the target's task set value 2369 * @starget: struct scsi_target 2370 * 2371 * Set the target's task set value so that error handling works as 2372 * expected. 2373 * 2374 * Returns: 2375 * 0 on success / -ENXIO if device does not exist 2376 **/ 2377static int ibmvfc_target_alloc(struct scsi_target *starget) 2378{ 2379 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2380 struct ibmvfc_host *vhost = shost_priv(shost); 2381 unsigned long flags = 0; 2382 2383 spin_lock_irqsave(shost->host_lock, flags); 2384 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2385 spin_unlock_irqrestore(shost->host_lock, flags); 2386 return 0; 2387} 2388 2389/** 2390 * ibmvfc_slave_configure - Configure the device 2391 * @sdev: struct scsi_device device to configure 2392 * 2393 * Enable allow_restart for a device if it is a disk. Adjust the 2394 * queue_depth here also. 2395 * 2396 * Returns: 2397 * 0 2398 **/ 2399static int ibmvfc_slave_configure(struct scsi_device *sdev) 2400{ 2401 struct Scsi_Host *shost = sdev->host; 2402 struct fc_rport *rport = starget_to_rport(sdev->sdev_target); 2403 unsigned long flags = 0; 2404 2405 spin_lock_irqsave(shost->host_lock, flags); 2406 if (sdev->type == TYPE_DISK) 2407 sdev->allow_restart = 1; 2408 2409 if (sdev->tagged_supported) { 2410 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 2411 scsi_activate_tcq(sdev, sdev->queue_depth); 2412 } else 2413 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2414 2415 rport->dev_loss_tmo = dev_loss_tmo; 2416 spin_unlock_irqrestore(shost->host_lock, flags); 2417 return 0; 2418} 2419 2420/** 2421 * ibmvfc_change_queue_depth - Change the device's queue depth 2422 * @sdev: scsi device struct 2423 * @qdepth: depth to set 2424 * 2425 * Return value: 2426 * actual depth set 2427 **/ 2428static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 2429{ 2430 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2431 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2432 2433 scsi_adjust_queue_depth(sdev, 0, qdepth); 2434 return sdev->queue_depth; 2435} 2436 2437/** 2438 * ibmvfc_change_queue_type - Change the device's queue type 2439 * @sdev: scsi device struct 2440 * @tag_type: type of tags to use 2441 * 2442 * Return value: 2443 * actual queue type set 2444 **/ 2445static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) 2446{ 2447 if (sdev->tagged_supported) { 2448 scsi_set_tag_type(sdev, tag_type); 2449 2450 if (tag_type) 2451 scsi_activate_tcq(sdev, sdev->queue_depth); 2452 else 2453 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2454 } else 2455 tag_type = 0; 2456 2457 return tag_type; 2458} 2459 2460static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2461 struct device_attribute *attr, char *buf) 2462{ 2463 struct Scsi_Host *shost = class_to_shost(dev); 2464 struct ibmvfc_host *vhost = shost_priv(shost); 2465 2466 return snprintf(buf, PAGE_SIZE, "%s\n", 2467 vhost->login_buf->resp.partition_name); 2468} 2469 2470static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2471 struct device_attribute *attr, char *buf) 2472{ 2473 struct Scsi_Host *shost = class_to_shost(dev); 2474 struct ibmvfc_host *vhost = shost_priv(shost); 2475 2476 return snprintf(buf, PAGE_SIZE, "%s\n", 2477 vhost->login_buf->resp.device_name); 2478} 2479 2480static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2481 struct device_attribute *attr, char *buf) 2482{ 2483 struct Scsi_Host *shost = class_to_shost(dev); 2484 struct ibmvfc_host *vhost = shost_priv(shost); 2485 2486 return snprintf(buf, PAGE_SIZE, "%s\n", 2487 vhost->login_buf->resp.port_loc_code); 2488} 2489 2490static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2491 struct device_attribute *attr, char *buf) 2492{ 2493 struct Scsi_Host *shost = class_to_shost(dev); 2494 struct ibmvfc_host *vhost = shost_priv(shost); 2495 2496 return snprintf(buf, PAGE_SIZE, "%s\n", 2497 vhost->login_buf->resp.drc_name); 2498} 2499 2500static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2501 struct device_attribute *attr, char *buf) 2502{ 2503 struct Scsi_Host *shost = class_to_shost(dev); 2504 struct ibmvfc_host *vhost = shost_priv(shost); 2505 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2506} 2507 2508/** 2509 * ibmvfc_show_log_level - Show the adapter's error logging level 2510 * @dev: class device struct 2511 * @buf: buffer 2512 * 2513 * Return value: 2514 * number of bytes printed to buffer 2515 **/ 2516static ssize_t ibmvfc_show_log_level(struct device *dev, 2517 struct device_attribute *attr, char *buf) 2518{ 2519 struct Scsi_Host *shost = class_to_shost(dev); 2520 struct ibmvfc_host *vhost = shost_priv(shost); 2521 unsigned long flags = 0; 2522 int len; 2523 2524 spin_lock_irqsave(shost->host_lock, flags); 2525 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2526 spin_unlock_irqrestore(shost->host_lock, flags); 2527 return len; 2528} 2529 2530/** 2531 * ibmvfc_store_log_level - Change the adapter's error logging level 2532 * @dev: class device struct 2533 * @buf: buffer 2534 * 2535 * Return value: 2536 * number of bytes printed to buffer 2537 **/ 2538static ssize_t ibmvfc_store_log_level(struct device *dev, 2539 struct device_attribute *attr, 2540 const char *buf, size_t count) 2541{ 2542 struct Scsi_Host *shost = class_to_shost(dev); 2543 struct ibmvfc_host *vhost = shost_priv(shost); 2544 unsigned long flags = 0; 2545 2546 spin_lock_irqsave(shost->host_lock, flags); 2547 vhost->log_level = simple_strtoul(buf, NULL, 10); 2548 spin_unlock_irqrestore(shost->host_lock, flags); 2549 return strlen(buf); 2550} 2551 2552static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 2553static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 2554static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 2555static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 2556static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 2557static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 2558 ibmvfc_show_log_level, ibmvfc_store_log_level); 2559 2560#ifdef CONFIG_SCSI_IBMVFC_TRACE 2561/** 2562 * ibmvfc_read_trace - Dump the adapter trace 2563 * @kobj: kobject struct 2564 * @bin_attr: bin_attribute struct 2565 * @buf: buffer 2566 * @off: offset 2567 * @count: buffer size 2568 * 2569 * Return value: 2570 * number of bytes printed to buffer 2571 **/ 2572static ssize_t ibmvfc_read_trace(struct kobject *kobj, 2573 struct bin_attribute *bin_attr, 2574 char *buf, loff_t off, size_t count) 2575{ 2576 struct device *dev = container_of(kobj, struct device, kobj); 2577 struct Scsi_Host *shost = class_to_shost(dev); 2578 struct ibmvfc_host *vhost = shost_priv(shost); 2579 unsigned long flags = 0; 2580 int size = IBMVFC_TRACE_SIZE; 2581 char *src = (char *)vhost->trace; 2582 2583 if (off > size) 2584 return 0; 2585 if (off + count > size) { 2586 size -= off; 2587 count = size; 2588 } 2589 2590 spin_lock_irqsave(shost->host_lock, flags); 2591 memcpy(buf, &src[off], count); 2592 spin_unlock_irqrestore(shost->host_lock, flags); 2593 return count; 2594} 2595 2596static struct bin_attribute ibmvfc_trace_attr = { 2597 .attr = { 2598 .name = "trace", 2599 .mode = S_IRUGO, 2600 }, 2601 .size = 0, 2602 .read = ibmvfc_read_trace, 2603}; 2604#endif 2605 2606static struct device_attribute *ibmvfc_attrs[] = { 2607 &dev_attr_partition_name, 2608 &dev_attr_device_name, 2609 &dev_attr_port_loc_code, 2610 &dev_attr_drc_name, 2611 &dev_attr_npiv_version, 2612 &dev_attr_log_level, 2613 NULL 2614}; 2615 2616static struct scsi_host_template driver_template = { 2617 .module = THIS_MODULE, 2618 .name = "IBM POWER Virtual FC Adapter", 2619 .proc_name = IBMVFC_NAME, 2620 .queuecommand = ibmvfc_queuecommand, 2621 .eh_abort_handler = ibmvfc_eh_abort_handler, 2622 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 2623 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 2624 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 2625 .slave_alloc = ibmvfc_slave_alloc, 2626 .slave_configure = ibmvfc_slave_configure, 2627 .target_alloc = ibmvfc_target_alloc, 2628 .scan_finished = ibmvfc_scan_finished, 2629 .change_queue_depth = ibmvfc_change_queue_depth, 2630 .change_queue_type = ibmvfc_change_queue_type, 2631 .cmd_per_lun = 16, 2632 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 2633 .this_id = -1, 2634 .sg_tablesize = SG_ALL, 2635 .max_sectors = IBMVFC_MAX_SECTORS, 2636 .use_clustering = ENABLE_CLUSTERING, 2637 .shost_attrs = ibmvfc_attrs, 2638}; 2639 2640/** 2641 * ibmvfc_next_async_crq - Returns the next entry in async queue 2642 * @vhost: ibmvfc host struct 2643 * 2644 * Returns: 2645 * Pointer to next entry in queue / NULL if empty 2646 **/ 2647static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 2648{ 2649 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 2650 struct ibmvfc_async_crq *crq; 2651 2652 crq = &async_crq->msgs[async_crq->cur]; 2653 if (crq->valid & 0x80) { 2654 if (++async_crq->cur == async_crq->size) 2655 async_crq->cur = 0; 2656 } else 2657 crq = NULL; 2658 2659 return crq; 2660} 2661 2662/** 2663 * ibmvfc_next_crq - Returns the next entry in message queue 2664 * @vhost: ibmvfc host struct 2665 * 2666 * Returns: 2667 * Pointer to next entry in queue / NULL if empty 2668 **/ 2669static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 2670{ 2671 struct ibmvfc_crq_queue *queue = &vhost->crq; 2672 struct ibmvfc_crq *crq; 2673 2674 crq = &queue->msgs[queue->cur]; 2675 if (crq->valid & 0x80) { 2676 if (++queue->cur == queue->size) 2677 queue->cur = 0; 2678 } else 2679 crq = NULL; 2680 2681 return crq; 2682} 2683 2684/** 2685 * ibmvfc_interrupt - Interrupt handler 2686 * @irq: number of irq to handle, not used 2687 * @dev_instance: ibmvfc_host that received interrupt 2688 * 2689 * Returns: 2690 * IRQ_HANDLED 2691 **/ 2692static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 2693{ 2694 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 2695 unsigned long flags; 2696 2697 spin_lock_irqsave(vhost->host->host_lock, flags); 2698 vio_disable_interrupts(to_vio_dev(vhost->dev)); 2699 tasklet_schedule(&vhost->tasklet); 2700 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2701 return IRQ_HANDLED; 2702} 2703 2704/** 2705 * ibmvfc_tasklet - Interrupt handler tasklet 2706 * @data: ibmvfc host struct 2707 * 2708 * Returns: 2709 * Nothing 2710 **/ 2711static void ibmvfc_tasklet(void *data) 2712{ 2713 struct ibmvfc_host *vhost = data; 2714 struct vio_dev *vdev = to_vio_dev(vhost->dev); 2715 struct ibmvfc_crq *crq; 2716 struct ibmvfc_async_crq *async; 2717 unsigned long flags; 2718 int done = 0; 2719 2720 spin_lock_irqsave(vhost->host->host_lock, flags); 2721 while (!done) { 2722 /* Pull all the valid messages off the CRQ */ 2723 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 2724 ibmvfc_handle_crq(crq, vhost); 2725 crq->valid = 0; 2726 } 2727 2728 /* Pull all the valid messages off the async CRQ */ 2729 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 2730 ibmvfc_handle_async(async, vhost); 2731 async->valid = 0; 2732 } 2733 2734 vio_enable_interrupts(vdev); 2735 if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 2736 vio_disable_interrupts(vdev); 2737 ibmvfc_handle_crq(crq, vhost); 2738 crq->valid = 0; 2739 } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 2740 vio_disable_interrupts(vdev); 2741 ibmvfc_handle_async(async, vhost); 2742 async->valid = 0; 2743 } else 2744 done = 1; 2745 } 2746 2747 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2748} 2749 2750/** 2751 * ibmvfc_init_tgt - Set the next init job step for the target 2752 * @tgt: ibmvfc target struct 2753 * @job_step: job step to perform 2754 * 2755 **/ 2756static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 2757 void (*job_step) (struct ibmvfc_target *)) 2758{ 2759 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 2760 tgt->job_step = job_step; 2761 wake_up(&tgt->vhost->work_wait_q); 2762} 2763 2764/** 2765 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 2766 * @tgt: ibmvfc target struct 2767 * @job_step: initialization job step 2768 * 2769 * Returns: 1 if step will be retried / 0 if not 2770 * 2771 **/ 2772static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 2773 void (*job_step) (struct ibmvfc_target *)) 2774{ 2775 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 2776 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2777 wake_up(&tgt->vhost->work_wait_q); 2778 return 0; 2779 } else 2780 ibmvfc_init_tgt(tgt, job_step); 2781 return 1; 2782} 2783 2784/* Defined in FC-LS */ 2785static const struct { 2786 int code; 2787 int retry; 2788 int logged_in; 2789} prli_rsp [] = { 2790 { 0, 1, 0 }, 2791 { 1, 0, 1 }, 2792 { 2, 1, 0 }, 2793 { 3, 1, 0 }, 2794 { 4, 0, 0 }, 2795 { 5, 0, 0 }, 2796 { 6, 0, 1 }, 2797 { 7, 0, 0 }, 2798 { 8, 1, 0 }, 2799}; 2800 2801/** 2802 * ibmvfc_get_prli_rsp - Find PRLI response index 2803 * @flags: PRLI response flags 2804 * 2805 **/ 2806static int ibmvfc_get_prli_rsp(u16 flags) 2807{ 2808 int i; 2809 int code = (flags & 0x0f00) >> 8; 2810 2811 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 2812 if (prli_rsp[i].code == code) 2813 return i; 2814 2815 return 0; 2816} 2817 2818/** 2819 * ibmvfc_tgt_prli_done - Completion handler for Process Login 2820 * @evt: ibmvfc event struct 2821 * 2822 **/ 2823static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 2824{ 2825 struct ibmvfc_target *tgt = evt->tgt; 2826 struct ibmvfc_host *vhost = evt->vhost; 2827 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 2828 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 2829 u32 status = rsp->common.status; 2830 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 2831 2832 vhost->discovery_threads--; 2833 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2834 switch (status) { 2835 case IBMVFC_MAD_SUCCESS: 2836 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 2837 parms->type, parms->flags, parms->service_parms); 2838 2839 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 2840 index = ibmvfc_get_prli_rsp(parms->flags); 2841 if (prli_rsp[index].logged_in) { 2842 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) { 2843 tgt->need_login = 0; 2844 tgt->ids.roles = 0; 2845 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC) 2846 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 2847 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC) 2848 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 2849 tgt->add_rport = 1; 2850 } else 2851 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2852 } else if (prli_rsp[index].retry) 2853 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2854 else 2855 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2856 } else 2857 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2858 break; 2859 case IBMVFC_MAD_DRIVER_FAILED: 2860 break; 2861 case IBMVFC_MAD_CRQ_ERROR: 2862 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2863 break; 2864 case IBMVFC_MAD_FAILED: 2865 default: 2866 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 2867 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2868 else 2869 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2870 2871 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 2872 ibmvfc_get_cmd_error(rsp->status, rsp->error), 2873 rsp->status, rsp->error, status); 2874 break; 2875 }; 2876 2877 kref_put(&tgt->kref, ibmvfc_release_tgt); 2878 ibmvfc_free_event(evt); 2879 wake_up(&vhost->work_wait_q); 2880} 2881 2882/** 2883 * ibmvfc_tgt_send_prli - Send a process login 2884 * @tgt: ibmvfc target struct 2885 * 2886 **/ 2887static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 2888{ 2889 struct ibmvfc_process_login *prli; 2890 struct ibmvfc_host *vhost = tgt->vhost; 2891 struct ibmvfc_event *evt; 2892 2893 if (vhost->discovery_threads >= disc_threads) 2894 return; 2895 2896 kref_get(&tgt->kref); 2897 evt = ibmvfc_get_event(vhost); 2898 vhost->discovery_threads++; 2899 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 2900 evt->tgt = tgt; 2901 prli = &evt->iu.prli; 2902 memset(prli, 0, sizeof(*prli)); 2903 prli->common.version = 1; 2904 prli->common.opcode = IBMVFC_PROCESS_LOGIN; 2905 prli->common.length = sizeof(*prli); 2906 prli->scsi_id = tgt->scsi_id; 2907 2908 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 2909 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; 2910 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; 2911 2912 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 2913 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 2914 vhost->discovery_threads--; 2915 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2916 kref_put(&tgt->kref, ibmvfc_release_tgt); 2917 } else 2918 tgt_dbg(tgt, "Sent process login\n"); 2919} 2920 2921/** 2922 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 2923 * @evt: ibmvfc event struct 2924 * 2925 **/ 2926static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 2927{ 2928 struct ibmvfc_target *tgt = evt->tgt; 2929 struct ibmvfc_host *vhost = evt->vhost; 2930 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 2931 u32 status = rsp->common.status; 2932 int level = IBMVFC_DEFAULT_LOG_LEVEL; 2933 2934 vhost->discovery_threads--; 2935 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2936 switch (status) { 2937 case IBMVFC_MAD_SUCCESS: 2938 tgt_dbg(tgt, "Port Login succeeded\n"); 2939 if (tgt->ids.port_name && 2940 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 2941 vhost->reinit = 1; 2942 tgt_dbg(tgt, "Port re-init required\n"); 2943 break; 2944 } 2945 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 2946 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 2947 tgt->ids.port_id = tgt->scsi_id; 2948 memcpy(&tgt->service_parms, &rsp->service_parms, 2949 sizeof(tgt->service_parms)); 2950 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 2951 sizeof(tgt->service_parms_change)); 2952 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 2953 break; 2954 case IBMVFC_MAD_DRIVER_FAILED: 2955 break; 2956 case IBMVFC_MAD_CRQ_ERROR: 2957 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 2958 break; 2959 case IBMVFC_MAD_FAILED: 2960 default: 2961 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 2962 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 2963 else 2964 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2965 2966 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 2967 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 2968 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 2969 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); 2970 break; 2971 }; 2972 2973 kref_put(&tgt->kref, ibmvfc_release_tgt); 2974 ibmvfc_free_event(evt); 2975 wake_up(&vhost->work_wait_q); 2976} 2977 2978/** 2979 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 2980 * @tgt: ibmvfc target struct 2981 * 2982 **/ 2983static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 2984{ 2985 struct ibmvfc_port_login *plogi; 2986 struct ibmvfc_host *vhost = tgt->vhost; 2987 struct ibmvfc_event *evt; 2988 2989 if (vhost->discovery_threads >= disc_threads) 2990 return; 2991 2992 kref_get(&tgt->kref); 2993 evt = ibmvfc_get_event(vhost); 2994 vhost->discovery_threads++; 2995 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 2996 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 2997 evt->tgt = tgt; 2998 plogi = &evt->iu.plogi; 2999 memset(plogi, 0, sizeof(*plogi)); 3000 plogi->common.version = 1; 3001 plogi->common.opcode = IBMVFC_PORT_LOGIN; 3002 plogi->common.length = sizeof(*plogi); 3003 plogi->scsi_id = tgt->scsi_id; 3004 3005 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3006 vhost->discovery_threads--; 3007 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3008 kref_put(&tgt->kref, ibmvfc_release_tgt); 3009 } else 3010 tgt_dbg(tgt, "Sent port login\n"); 3011} 3012 3013/** 3014 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3015 * @evt: ibmvfc event struct 3016 * 3017 **/ 3018static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3019{ 3020 struct ibmvfc_target *tgt = evt->tgt; 3021 struct ibmvfc_host *vhost = evt->vhost; 3022 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3023 u32 status = rsp->common.status; 3024 3025 vhost->discovery_threads--; 3026 ibmvfc_free_event(evt); 3027 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3028 3029 switch (status) { 3030 case IBMVFC_MAD_SUCCESS: 3031 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3032 break; 3033 case IBMVFC_MAD_DRIVER_FAILED: 3034 kref_put(&tgt->kref, ibmvfc_release_tgt); 3035 wake_up(&vhost->work_wait_q); 3036 return; 3037 case IBMVFC_MAD_FAILED: 3038 default: 3039 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3040 break; 3041 }; 3042 3043 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3044 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3045 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3046 tgt->scsi_id != tgt->new_scsi_id) 3047 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3048 kref_put(&tgt->kref, ibmvfc_release_tgt); 3049 wake_up(&vhost->work_wait_q); 3050} 3051 3052/** 3053 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3054 * @tgt: ibmvfc target struct 3055 * 3056 **/ 3057static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3058{ 3059 struct ibmvfc_implicit_logout *mad; 3060 struct ibmvfc_host *vhost = tgt->vhost; 3061 struct ibmvfc_event *evt; 3062 3063 if (vhost->discovery_threads >= disc_threads) 3064 return; 3065 3066 kref_get(&tgt->kref); 3067 evt = ibmvfc_get_event(vhost); 3068 vhost->discovery_threads++; 3069 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3070 evt->tgt = tgt; 3071 mad = &evt->iu.implicit_logout; 3072 memset(mad, 0, sizeof(*mad)); 3073 mad->common.version = 1; 3074 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; 3075 mad->common.length = sizeof(*mad); 3076 mad->old_scsi_id = tgt->scsi_id; 3077 3078 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3079 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3080 vhost->discovery_threads--; 3081 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3082 kref_put(&tgt->kref, ibmvfc_release_tgt); 3083 } else 3084 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3085} 3086 3087/** 3088 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3089 * @mad: ibmvfc passthru mad struct 3090 * @tgt: ibmvfc target struct 3091 * 3092 * Returns: 3093 * 1 if PLOGI needed / 0 if PLOGI not needed 3094 **/ 3095static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3096 struct ibmvfc_target *tgt) 3097{ 3098 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3099 sizeof(tgt->ids.port_name))) 3100 return 1; 3101 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3102 sizeof(tgt->ids.node_name))) 3103 return 1; 3104 if (mad->fc_iu.response[6] != tgt->scsi_id) 3105 return 1; 3106 return 0; 3107} 3108 3109/** 3110 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3111 * @evt: ibmvfc event struct 3112 * 3113 **/ 3114static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3115{ 3116 struct ibmvfc_target *tgt = evt->tgt; 3117 struct ibmvfc_host *vhost = evt->vhost; 3118 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3119 u32 status = mad->common.status; 3120 u8 fc_reason, fc_explain; 3121 3122 vhost->discovery_threads--; 3123 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3124 del_timer(&tgt->timer); 3125 3126 switch (status) { 3127 case IBMVFC_MAD_SUCCESS: 3128 tgt_dbg(tgt, "ADISC succeeded\n"); 3129 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3130 tgt->need_login = 1; 3131 break; 3132 case IBMVFC_MAD_DRIVER_FAILED: 3133 break; 3134 case IBMVFC_MAD_FAILED: 3135 default: 3136 tgt->need_login = 1; 3137 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; 3138 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; 3139 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3140 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), 3141 mad->iu.status, mad->iu.error, 3142 ibmvfc_get_fc_type(fc_reason), fc_reason, 3143 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3144 break; 3145 }; 3146 3147 kref_put(&tgt->kref, ibmvfc_release_tgt); 3148 ibmvfc_free_event(evt); 3149 wake_up(&vhost->work_wait_q); 3150} 3151 3152/** 3153 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3154 * @evt: ibmvfc event struct 3155 * 3156 **/ 3157static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3158{ 3159 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3160 3161 memset(mad, 0, sizeof(*mad)); 3162 mad->common.version = 1; 3163 mad->common.opcode = IBMVFC_PASSTHRU; 3164 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 3165 mad->cmd_ioba.va = (u64)evt->crq.ioba + 3166 offsetof(struct ibmvfc_passthru_mad, iu); 3167 mad->cmd_ioba.len = sizeof(mad->iu); 3168 mad->iu.cmd_len = sizeof(mad->fc_iu.payload); 3169 mad->iu.rsp_len = sizeof(mad->fc_iu.response); 3170 mad->iu.cmd.va = (u64)evt->crq.ioba + 3171 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3172 offsetof(struct ibmvfc_passthru_fc_iu, payload); 3173 mad->iu.cmd.len = sizeof(mad->fc_iu.payload); 3174 mad->iu.rsp.va = (u64)evt->crq.ioba + 3175 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3176 offsetof(struct ibmvfc_passthru_fc_iu, response); 3177 mad->iu.rsp.len = sizeof(mad->fc_iu.response); 3178} 3179 3180/** 3181 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3182 * @evt: ibmvfc event struct 3183 * 3184 * Just cleanup this event struct. Everything else is handled by 3185 * the ADISC completion handler. If the ADISC never actually comes 3186 * back, we still have the timer running on the ADISC event struct 3187 * which will fire and cause the CRQ to get reset. 3188 * 3189 **/ 3190static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3191{ 3192 struct ibmvfc_host *vhost = evt->vhost; 3193 struct ibmvfc_target *tgt = evt->tgt; 3194 3195 tgt_dbg(tgt, "ADISC cancel complete\n"); 3196 vhost->abort_threads--; 3197 ibmvfc_free_event(evt); 3198 kref_put(&tgt->kref, ibmvfc_release_tgt); 3199 wake_up(&vhost->work_wait_q); 3200} 3201 3202/** 3203 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3204 * @tgt: ibmvfc target struct 3205 * 3206 * If an ADISC times out, send a cancel. If the cancel times 3207 * out, reset the CRQ. When the ADISC comes back as cancelled, 3208 * log back into the target. 3209 **/ 3210static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) 3211{ 3212 struct ibmvfc_host *vhost = tgt->vhost; 3213 struct ibmvfc_event *evt; 3214 struct ibmvfc_tmf *tmf; 3215 unsigned long flags; 3216 int rc; 3217 3218 tgt_dbg(tgt, "ADISC timeout\n"); 3219 spin_lock_irqsave(vhost->host->host_lock, flags); 3220 if (vhost->abort_threads >= disc_threads || 3221 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3222 vhost->state != IBMVFC_INITIALIZING || 3223 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3224 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3225 return; 3226 } 3227 3228 vhost->abort_threads++; 3229 kref_get(&tgt->kref); 3230 evt = ibmvfc_get_event(vhost); 3231 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3232 3233 evt->tgt = tgt; 3234 tmf = &evt->iu.tmf; 3235 memset(tmf, 0, sizeof(*tmf)); 3236 tmf->common.version = 1; 3237 tmf->common.opcode = IBMVFC_TMF_MAD; 3238 tmf->common.length = sizeof(*tmf); 3239 tmf->scsi_id = tgt->scsi_id; 3240 tmf->cancel_key = tgt->cancel_key; 3241 3242 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3243 3244 if (rc) { 3245 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3246 vhost->abort_threads--; 3247 kref_put(&tgt->kref, ibmvfc_release_tgt); 3248 __ibmvfc_reset_host(vhost); 3249 } else 3250 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3251 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3252} 3253 3254/** 3255 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3256 * @tgt: ibmvfc target struct 3257 * 3258 * When sending an ADISC we end up with two timers running. The 3259 * first timer is the timer in the ibmvfc target struct. If this 3260 * fires, we send a cancel to the target. The second timer is the 3261 * timer on the ibmvfc event for the ADISC, which is longer. If that 3262 * fires, it means the ADISC timed out and our attempt to cancel it 3263 * also failed, so we need to reset the CRQ. 3264 **/ 3265static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3266{ 3267 struct ibmvfc_passthru_mad *mad; 3268 struct ibmvfc_host *vhost = tgt->vhost; 3269 struct ibmvfc_event *evt; 3270 3271 if (vhost->discovery_threads >= disc_threads) 3272 return; 3273 3274 kref_get(&tgt->kref); 3275 evt = ibmvfc_get_event(vhost); 3276 vhost->discovery_threads++; 3277 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3278 evt->tgt = tgt; 3279 3280 ibmvfc_init_passthru(evt); 3281 mad = &evt->iu.passthru; 3282 mad->iu.flags = IBMVFC_FC_ELS; 3283 mad->iu.scsi_id = tgt->scsi_id; 3284 mad->iu.cancel_key = tgt->cancel_key; 3285 3286 mad->fc_iu.payload[0] = IBMVFC_ADISC; 3287 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3288 sizeof(vhost->login_buf->resp.port_name)); 3289 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3290 sizeof(vhost->login_buf->resp.node_name)); 3291 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; 3292 3293 if (timer_pending(&tgt->timer)) 3294 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3295 else { 3296 tgt->timer.data = (unsigned long) tgt; 3297 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3298 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; 3299 add_timer(&tgt->timer); 3300 } 3301 3302 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3303 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3304 vhost->discovery_threads--; 3305 del_timer(&tgt->timer); 3306 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3307 kref_put(&tgt->kref, ibmvfc_release_tgt); 3308 } else 3309 tgt_dbg(tgt, "Sent ADISC\n"); 3310} 3311 3312/** 3313 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3314 * @evt: ibmvfc event struct 3315 * 3316 **/ 3317static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3318{ 3319 struct ibmvfc_target *tgt = evt->tgt; 3320 struct ibmvfc_host *vhost = evt->vhost; 3321 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3322 u32 status = rsp->common.status; 3323 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3324 3325 vhost->discovery_threads--; 3326 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3327 switch (status) { 3328 case IBMVFC_MAD_SUCCESS: 3329 tgt_dbg(tgt, "Query Target succeeded\n"); 3330 tgt->new_scsi_id = rsp->scsi_id; 3331 if (rsp->scsi_id != tgt->scsi_id) 3332 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3333 else 3334 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3335 break; 3336 case IBMVFC_MAD_DRIVER_FAILED: 3337 break; 3338 case IBMVFC_MAD_CRQ_ERROR: 3339 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3340 break; 3341 case IBMVFC_MAD_FAILED: 3342 default: 3343 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3344 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && 3345 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) 3346 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3347 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3348 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3349 else 3350 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3351 3352 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3353 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3354 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3355 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); 3356 break; 3357 }; 3358 3359 kref_put(&tgt->kref, ibmvfc_release_tgt); 3360 ibmvfc_free_event(evt); 3361 wake_up(&vhost->work_wait_q); 3362} 3363 3364/** 3365 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3366 * @tgt: ibmvfc target struct 3367 * 3368 **/ 3369static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3370{ 3371 struct ibmvfc_query_tgt *query_tgt; 3372 struct ibmvfc_host *vhost = tgt->vhost; 3373 struct ibmvfc_event *evt; 3374 3375 if (vhost->discovery_threads >= disc_threads) 3376 return; 3377 3378 kref_get(&tgt->kref); 3379 evt = ibmvfc_get_event(vhost); 3380 vhost->discovery_threads++; 3381 evt->tgt = tgt; 3382 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3383 query_tgt = &evt->iu.query_tgt; 3384 memset(query_tgt, 0, sizeof(*query_tgt)); 3385 query_tgt->common.version = 1; 3386 query_tgt->common.opcode = IBMVFC_QUERY_TARGET; 3387 query_tgt->common.length = sizeof(*query_tgt); 3388 query_tgt->wwpn = tgt->ids.port_name; 3389 3390 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3391 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3392 vhost->discovery_threads--; 3393 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3394 kref_put(&tgt->kref, ibmvfc_release_tgt); 3395 } else 3396 tgt_dbg(tgt, "Sent Query Target\n"); 3397} 3398 3399/** 3400 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3401 * @vhost: ibmvfc host struct 3402 * @scsi_id: SCSI ID to allocate target for 3403 * 3404 * Returns: 3405 * 0 on success / other on failure 3406 **/ 3407static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3408{ 3409 struct ibmvfc_target *tgt; 3410 unsigned long flags; 3411 3412 spin_lock_irqsave(vhost->host->host_lock, flags); 3413 list_for_each_entry(tgt, &vhost->targets, queue) { 3414 if (tgt->scsi_id == scsi_id) { 3415 if (tgt->need_login) 3416 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3417 goto unlock_out; 3418 } 3419 } 3420 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3421 3422 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3423 if (!tgt) { 3424 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", 3425 scsi_id); 3426 return -ENOMEM; 3427 } 3428 3429 memset(tgt, 0, sizeof(*tgt)); 3430 tgt->scsi_id = scsi_id; 3431 tgt->new_scsi_id = scsi_id; 3432 tgt->vhost = vhost; 3433 tgt->need_login = 1; 3434 tgt->cancel_key = vhost->task_set++; 3435 init_timer(&tgt->timer); 3436 kref_init(&tgt->kref); 3437 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3438 spin_lock_irqsave(vhost->host->host_lock, flags); 3439 list_add_tail(&tgt->queue, &vhost->targets); 3440 3441unlock_out: 3442 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3443 return 0; 3444} 3445 3446/** 3447 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3448 * @vhost: ibmvfc host struct 3449 * 3450 * Returns: 3451 * 0 on success / other on failure 3452 **/ 3453static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3454{ 3455 int i, rc; 3456 3457 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3458 rc = ibmvfc_alloc_target(vhost, 3459 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); 3460 3461 return rc; 3462} 3463 3464/** 3465 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3466 * @evt: ibmvfc event struct 3467 * 3468 **/ 3469static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3470{ 3471 struct ibmvfc_host *vhost = evt->vhost; 3472 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3473 u32 mad_status = rsp->common.status; 3474 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3475 3476 switch (mad_status) { 3477 case IBMVFC_MAD_SUCCESS: 3478 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3479 vhost->num_targets = rsp->num_written; 3480 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3481 break; 3482 case IBMVFC_MAD_FAILED: 3483 level += ibmvfc_retry_host_init(vhost); 3484 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 3485 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3486 break; 3487 case IBMVFC_MAD_DRIVER_FAILED: 3488 break; 3489 default: 3490 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3491 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3492 break; 3493 } 3494 3495 ibmvfc_free_event(evt); 3496 wake_up(&vhost->work_wait_q); 3497} 3498 3499/** 3500 * ibmvfc_discover_targets - Send Discover Targets MAD 3501 * @vhost: ibmvfc host struct 3502 * 3503 **/ 3504static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3505{ 3506 struct ibmvfc_discover_targets *mad; 3507 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3508 3509 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3510 mad = &evt->iu.discover_targets; 3511 memset(mad, 0, sizeof(*mad)); 3512 mad->common.version = 1; 3513 mad->common.opcode = IBMVFC_DISC_TARGETS; 3514 mad->common.length = sizeof(*mad); 3515 mad->bufflen = vhost->disc_buf_sz; 3516 mad->buffer.va = vhost->disc_buf_dma; 3517 mad->buffer.len = vhost->disc_buf_sz; 3518 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3519 3520 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3521 ibmvfc_dbg(vhost, "Sent discover targets\n"); 3522 else 3523 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3524} 3525 3526/** 3527 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 3528 * @evt: ibmvfc event struct 3529 * 3530 **/ 3531static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 3532{ 3533 struct ibmvfc_host *vhost = evt->vhost; 3534 u32 mad_status = evt->xfer_iu->npiv_login.common.status; 3535 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 3536 unsigned int npiv_max_sectors; 3537 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3538 3539 switch (mad_status) { 3540 case IBMVFC_MAD_SUCCESS: 3541 ibmvfc_free_event(evt); 3542 break; 3543 case IBMVFC_MAD_FAILED: 3544 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3545 level += ibmvfc_retry_host_init(vhost); 3546 else 3547 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3548 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 3549 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3550 ibmvfc_free_event(evt); 3551 return; 3552 case IBMVFC_MAD_CRQ_ERROR: 3553 ibmvfc_retry_host_init(vhost); 3554 case IBMVFC_MAD_DRIVER_FAILED: 3555 ibmvfc_free_event(evt); 3556 return; 3557 default: 3558 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 3559 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3560 ibmvfc_free_event(evt); 3561 return; 3562 } 3563 3564 vhost->client_migrated = 0; 3565 3566 if (!(rsp->flags & IBMVFC_NATIVE_FC)) { 3567 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 3568 rsp->flags); 3569 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3570 wake_up(&vhost->work_wait_q); 3571 return; 3572 } 3573 3574 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { 3575 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 3576 rsp->max_cmds); 3577 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3578 wake_up(&vhost->work_wait_q); 3579 return; 3580 } 3581 3582 vhost->logged_in = 1; 3583 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); 3584 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 3585 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 3586 rsp->drc_name, npiv_max_sectors); 3587 3588 fc_host_fabric_name(vhost->host) = rsp->node_name; 3589 fc_host_node_name(vhost->host) = rsp->node_name; 3590 fc_host_port_name(vhost->host) = rsp->port_name; 3591 fc_host_port_id(vhost->host) = rsp->scsi_id; 3592 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 3593 fc_host_supported_classes(vhost->host) = 0; 3594 if (rsp->service_parms.class1_parms[0] & 0x80000000) 3595 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 3596 if (rsp->service_parms.class2_parms[0] & 0x80000000) 3597 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 3598 if (rsp->service_parms.class3_parms[0] & 0x80000000) 3599 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 3600 fc_host_maxframe_size(vhost->host) = 3601 rsp->service_parms.common.bb_rcv_sz & 0x0fff; 3602 3603 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; 3604 vhost->host->max_sectors = npiv_max_sectors; 3605 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 3606 wake_up(&vhost->work_wait_q); 3607} 3608 3609/** 3610 * ibmvfc_npiv_login - Sends NPIV login 3611 * @vhost: ibmvfc host struct 3612 * 3613 **/ 3614static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 3615{ 3616 struct ibmvfc_npiv_login_mad *mad; 3617 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3618 3619 ibmvfc_gather_partition_info(vhost); 3620 ibmvfc_set_login_info(vhost); 3621 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 3622 3623 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 3624 mad = &evt->iu.npiv_login; 3625 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 3626 mad->common.version = 1; 3627 mad->common.opcode = IBMVFC_NPIV_LOGIN; 3628 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); 3629 mad->buffer.va = vhost->login_buf_dma; 3630 mad->buffer.len = sizeof(*vhost->login_buf); 3631 3632 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3633 3634 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3635 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 3636 else 3637 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3638}; 3639 3640/** 3641 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 3642 * @vhost: ibmvfc host struct 3643 * 3644 **/ 3645static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 3646{ 3647 struct ibmvfc_host *vhost = evt->vhost; 3648 u32 mad_status = evt->xfer_iu->npiv_logout.common.status; 3649 3650 ibmvfc_free_event(evt); 3651 3652 switch (mad_status) { 3653 case IBMVFC_MAD_SUCCESS: 3654 if (list_empty(&vhost->sent) && 3655 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 3656 ibmvfc_init_host(vhost, 0); 3657 return; 3658 } 3659 break; 3660 case IBMVFC_MAD_FAILED: 3661 case IBMVFC_MAD_NOT_SUPPORTED: 3662 case IBMVFC_MAD_CRQ_ERROR: 3663 case IBMVFC_MAD_DRIVER_FAILED: 3664 default: 3665 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 3666 break; 3667 } 3668 3669 ibmvfc_hard_reset_host(vhost); 3670} 3671 3672/** 3673 * ibmvfc_npiv_logout - Issue an NPIV Logout 3674 * @vhost: ibmvfc host struct 3675 * 3676 **/ 3677static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 3678{ 3679 struct ibmvfc_npiv_logout_mad *mad; 3680 struct ibmvfc_event *evt; 3681 3682 evt = ibmvfc_get_event(vhost); 3683 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 3684 3685 mad = &evt->iu.npiv_logout; 3686 memset(mad, 0, sizeof(*mad)); 3687 mad->common.version = 1; 3688 mad->common.opcode = IBMVFC_NPIV_LOGOUT; 3689 mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad); 3690 3691 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 3692 3693 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3694 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 3695 else 3696 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3697} 3698 3699/** 3700 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 3701 * @vhost: ibmvfc host struct 3702 * 3703 * Returns: 3704 * 1 if work to do / 0 if not 3705 **/ 3706static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 3707{ 3708 struct ibmvfc_target *tgt; 3709 3710 list_for_each_entry(tgt, &vhost->targets, queue) { 3711 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 3712 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 3713 return 1; 3714 } 3715 3716 return 0; 3717} 3718 3719/** 3720 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 3721 * @vhost: ibmvfc host struct 3722 * 3723 * Returns: 3724 * 1 if work to do / 0 if not 3725 **/ 3726static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 3727{ 3728 struct ibmvfc_target *tgt; 3729 3730 if (kthread_should_stop()) 3731 return 1; 3732 switch (vhost->action) { 3733 case IBMVFC_HOST_ACTION_NONE: 3734 case IBMVFC_HOST_ACTION_INIT_WAIT: 3735 case IBMVFC_HOST_ACTION_LOGO_WAIT: 3736 return 0; 3737 case IBMVFC_HOST_ACTION_TGT_INIT: 3738 case IBMVFC_HOST_ACTION_QUERY_TGTS: 3739 if (vhost->discovery_threads == disc_threads) 3740 return 0; 3741 list_for_each_entry(tgt, &vhost->targets, queue) 3742 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 3743 return 1; 3744 list_for_each_entry(tgt, &vhost->targets, queue) 3745 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 3746 return 0; 3747 return 1; 3748 case IBMVFC_HOST_ACTION_LOGO: 3749 case IBMVFC_HOST_ACTION_INIT: 3750 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 3751 case IBMVFC_HOST_ACTION_TGT_DEL: 3752 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 3753 case IBMVFC_HOST_ACTION_QUERY: 3754 default: 3755 break; 3756 }; 3757 3758 return 1; 3759} 3760 3761/** 3762 * ibmvfc_work_to_do - Is there task level work to do? 3763 * @vhost: ibmvfc host struct 3764 * 3765 * Returns: 3766 * 1 if work to do / 0 if not 3767 **/ 3768static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 3769{ 3770 unsigned long flags; 3771 int rc; 3772 3773 spin_lock_irqsave(vhost->host->host_lock, flags); 3774 rc = __ibmvfc_work_to_do(vhost); 3775 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3776 return rc; 3777} 3778 3779/** 3780 * ibmvfc_log_ae - Log async events if necessary 3781 * @vhost: ibmvfc host struct 3782 * @events: events to log 3783 * 3784 **/ 3785static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 3786{ 3787 if (events & IBMVFC_AE_RSCN) 3788 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 3789 if ((events & IBMVFC_AE_LINKDOWN) && 3790 vhost->state >= IBMVFC_HALTED) 3791 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 3792 if ((events & IBMVFC_AE_LINKUP) && 3793 vhost->state == IBMVFC_INITIALIZING) 3794 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 3795} 3796 3797/** 3798 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 3799 * @tgt: ibmvfc target struct 3800 * 3801 **/ 3802static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 3803{ 3804 struct ibmvfc_host *vhost = tgt->vhost; 3805 struct fc_rport *rport; 3806 unsigned long flags; 3807 3808 tgt_dbg(tgt, "Adding rport\n"); 3809 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 3810 spin_lock_irqsave(vhost->host->host_lock, flags); 3811 3812 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 3813 tgt_dbg(tgt, "Deleting rport\n"); 3814 list_del(&tgt->queue); 3815 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3816 fc_remote_port_delete(rport); 3817 del_timer_sync(&tgt->timer); 3818 kref_put(&tgt->kref, ibmvfc_release_tgt); 3819 return; 3820 } 3821 3822 if (rport) { 3823 tgt_dbg(tgt, "rport add succeeded\n"); 3824 tgt->rport = rport; 3825 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; 3826 rport->supported_classes = 0; 3827 tgt->target_id = rport->scsi_target_id; 3828 if (tgt->service_parms.class1_parms[0] & 0x80000000) 3829 rport->supported_classes |= FC_COS_CLASS1; 3830 if (tgt->service_parms.class2_parms[0] & 0x80000000) 3831 rport->supported_classes |= FC_COS_CLASS2; 3832 if (tgt->service_parms.class3_parms[0] & 0x80000000) 3833 rport->supported_classes |= FC_COS_CLASS3; 3834 } else 3835 tgt_dbg(tgt, "rport add failed\n"); 3836 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3837} 3838 3839/** 3840 * ibmvfc_do_work - Do task level work 3841 * @vhost: ibmvfc host struct 3842 * 3843 **/ 3844static void ibmvfc_do_work(struct ibmvfc_host *vhost) 3845{ 3846 struct ibmvfc_target *tgt; 3847 unsigned long flags; 3848 struct fc_rport *rport; 3849 3850 ibmvfc_log_ae(vhost, vhost->events_to_log); 3851 spin_lock_irqsave(vhost->host->host_lock, flags); 3852 vhost->events_to_log = 0; 3853 switch (vhost->action) { 3854 case IBMVFC_HOST_ACTION_NONE: 3855 case IBMVFC_HOST_ACTION_LOGO_WAIT: 3856 case IBMVFC_HOST_ACTION_INIT_WAIT: 3857 break; 3858 case IBMVFC_HOST_ACTION_LOGO: 3859 vhost->job_step(vhost); 3860 break; 3861 case IBMVFC_HOST_ACTION_INIT: 3862 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 3863 if (vhost->delay_init) { 3864 vhost->delay_init = 0; 3865 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3866 ssleep(15); 3867 return; 3868 } else 3869 vhost->job_step(vhost); 3870 break; 3871 case IBMVFC_HOST_ACTION_QUERY: 3872 list_for_each_entry(tgt, &vhost->targets, queue) 3873 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 3874 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 3875 break; 3876 case IBMVFC_HOST_ACTION_QUERY_TGTS: 3877 list_for_each_entry(tgt, &vhost->targets, queue) { 3878 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 3879 tgt->job_step(tgt); 3880 break; 3881 } 3882 } 3883 3884 if (!ibmvfc_dev_init_to_do(vhost)) 3885 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 3886 break; 3887 case IBMVFC_HOST_ACTION_TGT_DEL: 3888 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 3889 list_for_each_entry(tgt, &vhost->targets, queue) { 3890 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 3891 tgt_dbg(tgt, "Deleting rport\n"); 3892 rport = tgt->rport; 3893 tgt->rport = NULL; 3894 list_del(&tgt->queue); 3895 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3896 if (rport) 3897 fc_remote_port_delete(rport); 3898 del_timer_sync(&tgt->timer); 3899 kref_put(&tgt->kref, ibmvfc_release_tgt); 3900 return; 3901 } 3902 } 3903 3904 if (vhost->state == IBMVFC_INITIALIZING) { 3905 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 3906 if (vhost->reinit) { 3907 vhost->reinit = 0; 3908 scsi_block_requests(vhost->host); 3909 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 3910 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3911 } else { 3912 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 3913 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3914 wake_up(&vhost->init_wait_q); 3915 schedule_work(&vhost->rport_add_work_q); 3916 vhost->init_retries = 0; 3917 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3918 scsi_unblock_requests(vhost->host); 3919 } 3920 3921 return; 3922 } else { 3923 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 3924 vhost->job_step = ibmvfc_discover_targets; 3925 } 3926 } else { 3927 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3928 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3929 scsi_unblock_requests(vhost->host); 3930 wake_up(&vhost->init_wait_q); 3931 return; 3932 } 3933 break; 3934 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 3935 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 3936 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3937 ibmvfc_alloc_targets(vhost); 3938 spin_lock_irqsave(vhost->host->host_lock, flags); 3939 break; 3940 case IBMVFC_HOST_ACTION_TGT_INIT: 3941 list_for_each_entry(tgt, &vhost->targets, queue) { 3942 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 3943 tgt->job_step(tgt); 3944 break; 3945 } 3946 } 3947 3948 if (!ibmvfc_dev_init_to_do(vhost)) 3949 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 3950 break; 3951 default: 3952 break; 3953 }; 3954 3955 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3956} 3957 3958/** 3959 * ibmvfc_work - Do task level work 3960 * @data: ibmvfc host struct 3961 * 3962 * Returns: 3963 * zero 3964 **/ 3965static int ibmvfc_work(void *data) 3966{ 3967 struct ibmvfc_host *vhost = data; 3968 int rc; 3969 3970 set_user_nice(current, -20); 3971 3972 while (1) { 3973 rc = wait_event_interruptible(vhost->work_wait_q, 3974 ibmvfc_work_to_do(vhost)); 3975 3976 BUG_ON(rc); 3977 3978 if (kthread_should_stop()) 3979 break; 3980 3981 ibmvfc_do_work(vhost); 3982 } 3983 3984 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 3985 return 0; 3986} 3987 3988/** 3989 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 3990 * @vhost: ibmvfc host struct 3991 * 3992 * Allocates a page for messages, maps it for dma, and registers 3993 * the crq with the hypervisor. 3994 * 3995 * Return value: 3996 * zero on success / other on failure 3997 **/ 3998static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 3999{ 4000 int rc, retrc = -ENOMEM; 4001 struct device *dev = vhost->dev; 4002 struct vio_dev *vdev = to_vio_dev(dev); 4003 struct ibmvfc_crq_queue *crq = &vhost->crq; 4004 4005 ENTER; 4006 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4007 4008 if (!crq->msgs) 4009 return -ENOMEM; 4010 4011 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4012 crq->msg_token = dma_map_single(dev, crq->msgs, 4013 PAGE_SIZE, DMA_BIDIRECTIONAL); 4014 4015 if (dma_mapping_error(dev, crq->msg_token)) 4016 goto map_failed; 4017 4018 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4019 crq->msg_token, PAGE_SIZE); 4020 4021 if (rc == H_RESOURCE) 4022 /* maybe kexecing and resource is busy. try a reset */ 4023 retrc = rc = ibmvfc_reset_crq(vhost); 4024 4025 if (rc == H_CLOSED) 4026 dev_warn(dev, "Partner adapter not ready\n"); 4027 else if (rc) { 4028 dev_warn(dev, "Error %d opening adapter\n", rc); 4029 goto reg_crq_failed; 4030 } 4031 4032 retrc = 0; 4033 4034 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4035 4036 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4037 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4038 goto req_irq_failed; 4039 } 4040 4041 if ((rc = vio_enable_interrupts(vdev))) { 4042 dev_err(dev, "Error %d enabling interrupts\n", rc); 4043 goto req_irq_failed; 4044 } 4045 4046 crq->cur = 0; 4047 LEAVE; 4048 return retrc; 4049 4050req_irq_failed: 4051 tasklet_kill(&vhost->tasklet); 4052 do { 4053 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4054 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4055reg_crq_failed: 4056 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4057map_failed: 4058 free_page((unsigned long)crq->msgs); 4059 return retrc; 4060} 4061 4062/** 4063 * ibmvfc_free_mem - Free memory for vhost 4064 * @vhost: ibmvfc host struct 4065 * 4066 * Return value: 4067 * none 4068 **/ 4069static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4070{ 4071 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4072 4073 ENTER; 4074 mempool_destroy(vhost->tgt_pool); 4075 kfree(vhost->trace); 4076 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4077 vhost->disc_buf_dma); 4078 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4079 vhost->login_buf, vhost->login_buf_dma); 4080 dma_pool_destroy(vhost->sg_pool); 4081 dma_unmap_single(vhost->dev, async_q->msg_token, 4082 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4083 free_page((unsigned long)async_q->msgs); 4084 LEAVE; 4085} 4086 4087/** 4088 * ibmvfc_alloc_mem - Allocate memory for vhost 4089 * @vhost: ibmvfc host struct 4090 * 4091 * Return value: 4092 * 0 on success / non-zero on failure 4093 **/ 4094static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4095{ 4096 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4097 struct device *dev = vhost->dev; 4098 4099 ENTER; 4100 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4101 if (!async_q->msgs) { 4102 dev_err(dev, "Couldn't allocate async queue.\n"); 4103 goto nomem; 4104 } 4105 4106 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4107 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4108 async_q->size * sizeof(*async_q->msgs), 4109 DMA_BIDIRECTIONAL); 4110 4111 if (dma_mapping_error(dev, async_q->msg_token)) { 4112 dev_err(dev, "Failed to map async queue\n"); 4113 goto free_async_crq; 4114 } 4115 4116 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4117 SG_ALL * sizeof(struct srp_direct_buf), 4118 sizeof(struct srp_direct_buf), 0); 4119 4120 if (!vhost->sg_pool) { 4121 dev_err(dev, "Failed to allocate sg pool\n"); 4122 goto unmap_async_crq; 4123 } 4124 4125 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4126 &vhost->login_buf_dma, GFP_KERNEL); 4127 4128 if (!vhost->login_buf) { 4129 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4130 goto free_sg_pool; 4131 } 4132 4133 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4134 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4135 &vhost->disc_buf_dma, GFP_KERNEL); 4136 4137 if (!vhost->disc_buf) { 4138 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4139 goto free_login_buffer; 4140 } 4141 4142 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4143 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4144 4145 if (!vhost->trace) 4146 goto free_disc_buffer; 4147 4148 vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4149 sizeof(struct ibmvfc_target)); 4150 4151 if (!vhost->tgt_pool) { 4152 dev_err(dev, "Couldn't allocate target memory pool\n"); 4153 goto free_trace; 4154 } 4155 4156 LEAVE; 4157 return 0; 4158 4159free_trace: 4160 kfree(vhost->trace); 4161free_disc_buffer: 4162 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4163 vhost->disc_buf_dma); 4164free_login_buffer: 4165 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4166 vhost->login_buf, vhost->login_buf_dma); 4167free_sg_pool: 4168 dma_pool_destroy(vhost->sg_pool); 4169unmap_async_crq: 4170 dma_unmap_single(dev, async_q->msg_token, 4171 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4172free_async_crq: 4173 free_page((unsigned long)async_q->msgs); 4174nomem: 4175 LEAVE; 4176 return -ENOMEM; 4177} 4178 4179/** 4180 * ibmvfc_rport_add_thread - Worker thread for rport adds 4181 * @work: work struct 4182 * 4183 **/ 4184static void ibmvfc_rport_add_thread(struct work_struct *work) 4185{ 4186 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4187 rport_add_work_q); 4188 struct ibmvfc_target *tgt; 4189 struct fc_rport *rport; 4190 unsigned long flags; 4191 int did_work; 4192 4193 ENTER; 4194 spin_lock_irqsave(vhost->host->host_lock, flags); 4195 do { 4196 did_work = 0; 4197 if (vhost->state != IBMVFC_ACTIVE) 4198 break; 4199 4200 list_for_each_entry(tgt, &vhost->targets, queue) { 4201 if (tgt->add_rport) { 4202 did_work = 1; 4203 tgt->add_rport = 0; 4204 kref_get(&tgt->kref); 4205 rport = tgt->rport; 4206 if (!rport) { 4207 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4208 ibmvfc_tgt_add_rport(tgt); 4209 } else if (get_device(&rport->dev)) { 4210 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4211 tgt_dbg(tgt, "Setting rport roles\n"); 4212 fc_remote_port_rolechg(rport, tgt->ids.roles); 4213 put_device(&rport->dev); 4214 } 4215 4216 kref_put(&tgt->kref, ibmvfc_release_tgt); 4217 spin_lock_irqsave(vhost->host->host_lock, flags); 4218 break; 4219 } 4220 } 4221 } while(did_work); 4222 4223 if (vhost->state == IBMVFC_ACTIVE) 4224 vhost->scan_complete = 1; 4225 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4226 LEAVE; 4227} 4228 4229/** 4230 * ibmvfc_probe - Adapter hot plug add entry point 4231 * @vdev: vio device struct 4232 * @id: vio device id struct 4233 * 4234 * Return value: 4235 * 0 on success / non-zero on failure 4236 **/ 4237static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4238{ 4239 struct ibmvfc_host *vhost; 4240 struct Scsi_Host *shost; 4241 struct device *dev = &vdev->dev; 4242 int rc = -ENOMEM; 4243 4244 ENTER; 4245 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4246 if (!shost) { 4247 dev_err(dev, "Couldn't allocate host data\n"); 4248 goto out; 4249 } 4250 4251 shost->transportt = ibmvfc_transport_template; 4252 shost->can_queue = max_requests; 4253 shost->max_lun = max_lun; 4254 shost->max_id = max_targets; 4255 shost->max_sectors = IBMVFC_MAX_SECTORS; 4256 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4257 shost->unique_id = shost->host_no; 4258 4259 vhost = shost_priv(shost); 4260 INIT_LIST_HEAD(&vhost->sent); 4261 INIT_LIST_HEAD(&vhost->free); 4262 INIT_LIST_HEAD(&vhost->targets); 4263 sprintf(vhost->name, IBMVFC_NAME); 4264 vhost->host = shost; 4265 vhost->dev = dev; 4266 vhost->partition_number = -1; 4267 vhost->log_level = log_level; 4268 vhost->task_set = 1; 4269 strcpy(vhost->partition_name, "UNKNOWN"); 4270 init_waitqueue_head(&vhost->work_wait_q); 4271 init_waitqueue_head(&vhost->init_wait_q); 4272 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4273 4274 if ((rc = ibmvfc_alloc_mem(vhost))) 4275 goto free_scsi_host; 4276 4277 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4278 shost->host_no); 4279 4280 if (IS_ERR(vhost->work_thread)) { 4281 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4282 PTR_ERR(vhost->work_thread)); 4283 goto free_host_mem; 4284 } 4285 4286 if ((rc = ibmvfc_init_crq(vhost))) { 4287 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4288 goto kill_kthread; 4289 } 4290 4291 if ((rc = ibmvfc_init_event_pool(vhost))) { 4292 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4293 goto release_crq; 4294 } 4295 4296 if ((rc = scsi_add_host(shost, dev))) 4297 goto release_event_pool; 4298 4299 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4300 &ibmvfc_trace_attr))) { 4301 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4302 goto remove_shost; 4303 } 4304 4305 dev_set_drvdata(dev, vhost); 4306 spin_lock(&ibmvfc_driver_lock); 4307 list_add_tail(&vhost->queue, &ibmvfc_head); 4308 spin_unlock(&ibmvfc_driver_lock); 4309 4310 ibmvfc_send_crq_init(vhost); 4311 scsi_scan_host(shost); 4312 return 0; 4313 4314remove_shost: 4315 scsi_remove_host(shost); 4316release_event_pool: 4317 ibmvfc_free_event_pool(vhost); 4318release_crq: 4319 ibmvfc_release_crq_queue(vhost); 4320kill_kthread: 4321 kthread_stop(vhost->work_thread); 4322free_host_mem: 4323 ibmvfc_free_mem(vhost); 4324free_scsi_host: 4325 scsi_host_put(shost); 4326out: 4327 LEAVE; 4328 return rc; 4329} 4330 4331/** 4332 * ibmvfc_remove - Adapter hot plug remove entry point 4333 * @vdev: vio device struct 4334 * 4335 * Return value: 4336 * 0 4337 **/ 4338static int ibmvfc_remove(struct vio_dev *vdev) 4339{ 4340 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4341 unsigned long flags; 4342 4343 ENTER; 4344 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4345 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4346 ibmvfc_wait_while_resetting(vhost); 4347 ibmvfc_release_crq_queue(vhost); 4348 kthread_stop(vhost->work_thread); 4349 fc_remove_host(vhost->host); 4350 scsi_remove_host(vhost->host); 4351 4352 spin_lock_irqsave(vhost->host->host_lock, flags); 4353 ibmvfc_purge_requests(vhost, DID_ERROR); 4354 ibmvfc_free_event_pool(vhost); 4355 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4356 4357 ibmvfc_free_mem(vhost); 4358 spin_lock(&ibmvfc_driver_lock); 4359 list_del(&vhost->queue); 4360 spin_unlock(&ibmvfc_driver_lock); 4361 scsi_host_put(vhost->host); 4362 LEAVE; 4363 return 0; 4364} 4365 4366/** 4367 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4368 * @vdev: vio device struct 4369 * 4370 * Return value: 4371 * Number of bytes the driver will need to DMA map at the same time in 4372 * order to perform well. 4373 */ 4374static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4375{ 4376 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4377 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4378} 4379 4380static struct vio_device_id ibmvfc_device_table[] __devinitdata = { 4381 {"fcp", "IBM,vfc-client"}, 4382 { "", "" } 4383}; 4384MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4385 4386static struct vio_driver ibmvfc_driver = { 4387 .id_table = ibmvfc_device_table, 4388 .probe = ibmvfc_probe, 4389 .remove = ibmvfc_remove, 4390 .get_desired_dma = ibmvfc_get_desired_dma, 4391 .driver = { 4392 .name = IBMVFC_NAME, 4393 .owner = THIS_MODULE, 4394 } 4395}; 4396 4397static struct fc_function_template ibmvfc_transport_functions = { 4398 .show_host_fabric_name = 1, 4399 .show_host_node_name = 1, 4400 .show_host_port_name = 1, 4401 .show_host_supported_classes = 1, 4402 .show_host_port_type = 1, 4403 .show_host_port_id = 1, 4404 .show_host_maxframe_size = 1, 4405 4406 .get_host_port_state = ibmvfc_get_host_port_state, 4407 .show_host_port_state = 1, 4408 4409 .get_host_speed = ibmvfc_get_host_speed, 4410 .show_host_speed = 1, 4411 4412 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4413 .terminate_rport_io = ibmvfc_terminate_rport_io, 4414 4415 .show_rport_maxframe_size = 1, 4416 .show_rport_supported_classes = 1, 4417 4418 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4419 .show_rport_dev_loss_tmo = 1, 4420 4421 .get_starget_node_name = ibmvfc_get_starget_node_name, 4422 .show_starget_node_name = 1, 4423 4424 .get_starget_port_name = ibmvfc_get_starget_port_name, 4425 .show_starget_port_name = 1, 4426 4427 .get_starget_port_id = ibmvfc_get_starget_port_id, 4428 .show_starget_port_id = 1, 4429}; 4430 4431/** 4432 * ibmvfc_module_init - Initialize the ibmvfc module 4433 * 4434 * Return value: 4435 * 0 on success / other on failure 4436 **/ 4437static int __init ibmvfc_module_init(void) 4438{ 4439 int rc; 4440 4441 if (!firmware_has_feature(FW_FEATURE_VIO)) 4442 return -ENODEV; 4443 4444 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4445 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4446 4447 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4448 if (!ibmvfc_transport_template) 4449 return -ENOMEM; 4450 4451 rc = vio_register_driver(&ibmvfc_driver); 4452 if (rc) 4453 fc_release_transport(ibmvfc_transport_template); 4454 return rc; 4455} 4456 4457/** 4458 * ibmvfc_module_exit - Teardown the ibmvfc module 4459 * 4460 * Return value: 4461 * nothing 4462 **/ 4463static void __exit ibmvfc_module_exit(void) 4464{ 4465 vio_unregister_driver(&ibmvfc_driver); 4466 fc_release_transport(ibmvfc_transport_template); 4467} 4468 4469module_init(ibmvfc_module_init); 4470module_exit(ibmvfc_module_exit); 4471