ibmvfc.c revision a3b7aeaba29e3dd995ece05ba50db9e0650c16b6
1/* 2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 3 * 4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 5 * 6 * Copyright (C) IBM Corporation, 2008 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24#include <linux/module.h> 25#include <linux/moduleparam.h> 26#include <linux/dma-mapping.h> 27#include <linux/dmapool.h> 28#include <linux/delay.h> 29#include <linux/interrupt.h> 30#include <linux/kthread.h> 31#include <linux/of.h> 32#include <linux/stringify.h> 33#include <asm/firmware.h> 34#include <asm/irq.h> 35#include <asm/vio.h> 36#include <scsi/scsi.h> 37#include <scsi/scsi_cmnd.h> 38#include <scsi/scsi_host.h> 39#include <scsi/scsi_device.h> 40#include <scsi/scsi_tcq.h> 41#include <scsi/scsi_transport_fc.h> 42#include "ibmvfc.h" 43 44static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 45static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 46static unsigned int max_lun = IBMVFC_MAX_LUN; 47static unsigned int max_targets = IBMVFC_MAX_TARGETS; 48static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 49static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 50static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO; 51static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 52static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 53static LIST_HEAD(ibmvfc_head); 54static DEFINE_SPINLOCK(ibmvfc_driver_lock); 55static struct scsi_transport_template *ibmvfc_transport_template; 56 57MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 58MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 59MODULE_LICENSE("GPL"); 60MODULE_VERSION(IBMVFC_DRIVER_VERSION); 61 62module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 63MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 64 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 65module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 66MODULE_PARM_DESC(default_timeout, 67 "Default timeout in seconds for initialization and EH commands. " 68 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 69module_param_named(max_requests, max_requests, uint, S_IRUGO); 70MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 71 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 72module_param_named(max_lun, max_lun, uint, S_IRUGO); 73MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 74 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 75module_param_named(max_targets, max_targets, uint, S_IRUGO); 76MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 77 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 78module_param_named(disc_threads, disc_threads, uint, S_IRUGO | S_IWUSR); 79MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 80 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 81module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 82MODULE_PARM_DESC(debug, "Enable driver debug information. " 83 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 84module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR); 85MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC " 86 "transport should insulate the loss of a remote port. Once this " 87 "value is exceeded, the scsi target is removed. " 88 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]"); 89module_param_named(log_level, log_level, uint, 0); 90MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 91 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 92 93static const struct { 94 u16 status; 95 u16 error; 96 u8 result; 97 u8 retry; 98 int log; 99 char *name; 100} cmd_status [] = { 101 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 102 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 103 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 104 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 105 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 106 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 107 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 108 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 109 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 110 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 111 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 112 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 0, 0, "link halted" }, 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 115 116 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 117 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 118 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 119 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 120 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 121 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 122 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 123 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 124 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 125 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 126 127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 128 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 129 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 131 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 132 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 133 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 134 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 135 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 136 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 137 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 138 139 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 140}; 141 142static void ibmvfc_npiv_login(struct ibmvfc_host *); 143static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 144static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 145static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 146 147static const char *unknown_error = "unknown error"; 148 149#ifdef CONFIG_SCSI_IBMVFC_TRACE 150/** 151 * ibmvfc_trc_start - Log a start trace entry 152 * @evt: ibmvfc event struct 153 * 154 **/ 155static void ibmvfc_trc_start(struct ibmvfc_event *evt) 156{ 157 struct ibmvfc_host *vhost = evt->vhost; 158 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 159 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 160 struct ibmvfc_trace_entry *entry; 161 162 entry = &vhost->trace[vhost->trace_index++]; 163 entry->evt = evt; 164 entry->time = jiffies; 165 entry->fmt = evt->crq.format; 166 entry->type = IBMVFC_TRC_START; 167 168 switch (entry->fmt) { 169 case IBMVFC_CMD_FORMAT: 170 entry->op_code = vfc_cmd->iu.cdb[0]; 171 entry->scsi_id = vfc_cmd->tgt_scsi_id; 172 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 173 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 174 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; 175 break; 176 case IBMVFC_MAD_FORMAT: 177 entry->op_code = mad->opcode; 178 break; 179 default: 180 break; 181 }; 182} 183 184/** 185 * ibmvfc_trc_end - Log an end trace entry 186 * @evt: ibmvfc event struct 187 * 188 **/ 189static void ibmvfc_trc_end(struct ibmvfc_event *evt) 190{ 191 struct ibmvfc_host *vhost = evt->vhost; 192 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 193 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 194 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; 195 196 entry->evt = evt; 197 entry->time = jiffies; 198 entry->fmt = evt->crq.format; 199 entry->type = IBMVFC_TRC_END; 200 201 switch (entry->fmt) { 202 case IBMVFC_CMD_FORMAT: 203 entry->op_code = vfc_cmd->iu.cdb[0]; 204 entry->scsi_id = vfc_cmd->tgt_scsi_id; 205 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 206 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 207 entry->u.end.status = vfc_cmd->status; 208 entry->u.end.error = vfc_cmd->error; 209 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; 210 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; 211 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; 212 break; 213 case IBMVFC_MAD_FORMAT: 214 entry->op_code = mad->opcode; 215 entry->u.end.status = mad->status; 216 break; 217 default: 218 break; 219 220 }; 221} 222 223#else 224#define ibmvfc_trc_start(evt) do { } while (0) 225#define ibmvfc_trc_end(evt) do { } while (0) 226#endif 227 228/** 229 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 230 * @status: status / error class 231 * @error: error 232 * 233 * Return value: 234 * index into cmd_status / -EINVAL on failure 235 **/ 236static int ibmvfc_get_err_index(u16 status, u16 error) 237{ 238 int i; 239 240 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 241 if ((cmd_status[i].status & status) == cmd_status[i].status && 242 cmd_status[i].error == error) 243 return i; 244 245 return -EINVAL; 246} 247 248/** 249 * ibmvfc_get_cmd_error - Find the error description for the fcp response 250 * @status: status / error class 251 * @error: error 252 * 253 * Return value: 254 * error description string 255 **/ 256static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 257{ 258 int rc = ibmvfc_get_err_index(status, error); 259 if (rc >= 0) 260 return cmd_status[rc].name; 261 return unknown_error; 262} 263 264/** 265 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 266 * @vfc_cmd: ibmvfc command struct 267 * 268 * Return value: 269 * SCSI result value to return for completed command 270 **/ 271static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) 272{ 273 int err; 274 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 275 int fc_rsp_len = rsp->fcp_rsp_len; 276 277 if ((rsp->flags & FCP_RSP_LEN_VALID) && 278 ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 279 rsp->data.info.rsp_code)) 280 return DID_ERROR << 16; 281 282 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 283 if (err >= 0) 284 return rsp->scsi_status | (cmd_status[err].result << 16); 285 return rsp->scsi_status | (DID_ERROR << 16); 286} 287 288/** 289 * ibmvfc_retry_cmd - Determine if error status is retryable 290 * @status: status / error class 291 * @error: error 292 * 293 * Return value: 294 * 1 if error should be retried / 0 if it should not 295 **/ 296static int ibmvfc_retry_cmd(u16 status, u16 error) 297{ 298 int rc = ibmvfc_get_err_index(status, error); 299 300 if (rc >= 0) 301 return cmd_status[rc].retry; 302 return 1; 303} 304 305static const char *unknown_fc_explain = "unknown fc explain"; 306 307static const struct { 308 u16 fc_explain; 309 char *name; 310} ls_explain [] = { 311 { 0x00, "no additional explanation" }, 312 { 0x01, "service parameter error - options" }, 313 { 0x03, "service parameter error - initiator control" }, 314 { 0x05, "service parameter error - recipient control" }, 315 { 0x07, "service parameter error - received data field size" }, 316 { 0x09, "service parameter error - concurrent seq" }, 317 { 0x0B, "service parameter error - credit" }, 318 { 0x0D, "invalid N_Port/F_Port_Name" }, 319 { 0x0E, "invalid node/Fabric Name" }, 320 { 0x0F, "invalid common service parameters" }, 321 { 0x11, "invalid association header" }, 322 { 0x13, "association header required" }, 323 { 0x15, "invalid originator S_ID" }, 324 { 0x17, "invalid OX_ID-RX-ID combination" }, 325 { 0x19, "command (request) already in progress" }, 326 { 0x1E, "N_Port Login requested" }, 327 { 0x1F, "Invalid N_Port_ID" }, 328}; 329 330static const struct { 331 u16 fc_explain; 332 char *name; 333} gs_explain [] = { 334 { 0x00, "no additional explanation" }, 335 { 0x01, "port identifier not registered" }, 336 { 0x02, "port name not registered" }, 337 { 0x03, "node name not registered" }, 338 { 0x04, "class of service not registered" }, 339 { 0x06, "initial process associator not registered" }, 340 { 0x07, "FC-4 TYPEs not registered" }, 341 { 0x08, "symbolic port name not registered" }, 342 { 0x09, "symbolic node name not registered" }, 343 { 0x0A, "port type not registered" }, 344 { 0xF0, "authorization exception" }, 345 { 0xF1, "authentication exception" }, 346 { 0xF2, "data base full" }, 347 { 0xF3, "data base empty" }, 348 { 0xF4, "processing request" }, 349 { 0xF5, "unable to verify connection" }, 350 { 0xF6, "devices not in a common zone" }, 351}; 352 353/** 354 * ibmvfc_get_ls_explain - Return the FC Explain description text 355 * @status: FC Explain status 356 * 357 * Returns: 358 * error string 359 **/ 360static const char *ibmvfc_get_ls_explain(u16 status) 361{ 362 int i; 363 364 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 365 if (ls_explain[i].fc_explain == status) 366 return ls_explain[i].name; 367 368 return unknown_fc_explain; 369} 370 371/** 372 * ibmvfc_get_gs_explain - Return the FC Explain description text 373 * @status: FC Explain status 374 * 375 * Returns: 376 * error string 377 **/ 378static const char *ibmvfc_get_gs_explain(u16 status) 379{ 380 int i; 381 382 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 383 if (gs_explain[i].fc_explain == status) 384 return gs_explain[i].name; 385 386 return unknown_fc_explain; 387} 388 389static const struct { 390 enum ibmvfc_fc_type fc_type; 391 char *name; 392} fc_type [] = { 393 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 394 { IBMVFC_PORT_REJECT, "port reject" }, 395 { IBMVFC_LS_REJECT, "ELS reject" }, 396 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 397 { IBMVFC_PORT_BUSY, "port busy" }, 398 { IBMVFC_BASIC_REJECT, "basic reject" }, 399}; 400 401static const char *unknown_fc_type = "unknown fc type"; 402 403/** 404 * ibmvfc_get_fc_type - Return the FC Type description text 405 * @status: FC Type error status 406 * 407 * Returns: 408 * error string 409 **/ 410static const char *ibmvfc_get_fc_type(u16 status) 411{ 412 int i; 413 414 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 415 if (fc_type[i].fc_type == status) 416 return fc_type[i].name; 417 418 return unknown_fc_type; 419} 420 421/** 422 * ibmvfc_set_tgt_action - Set the next init action for the target 423 * @tgt: ibmvfc target struct 424 * @action: action to perform 425 * 426 **/ 427static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 428 enum ibmvfc_target_action action) 429{ 430 switch (tgt->action) { 431 case IBMVFC_TGT_ACTION_DEL_RPORT: 432 break; 433 default: 434 tgt->action = action; 435 break; 436 } 437} 438 439/** 440 * ibmvfc_set_host_state - Set the state for the host 441 * @vhost: ibmvfc host struct 442 * @state: state to set host to 443 * 444 * Returns: 445 * 0 if state changed / non-zero if not changed 446 **/ 447static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 448 enum ibmvfc_host_state state) 449{ 450 int rc = 0; 451 452 switch (vhost->state) { 453 case IBMVFC_HOST_OFFLINE: 454 rc = -EINVAL; 455 break; 456 default: 457 vhost->state = state; 458 break; 459 }; 460 461 return rc; 462} 463 464/** 465 * ibmvfc_set_host_action - Set the next init action for the host 466 * @vhost: ibmvfc host struct 467 * @action: action to perform 468 * 469 **/ 470static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 471 enum ibmvfc_host_action action) 472{ 473 switch (action) { 474 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 475 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 476 vhost->action = action; 477 break; 478 case IBMVFC_HOST_ACTION_INIT_WAIT: 479 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 480 vhost->action = action; 481 break; 482 case IBMVFC_HOST_ACTION_QUERY: 483 switch (vhost->action) { 484 case IBMVFC_HOST_ACTION_INIT_WAIT: 485 case IBMVFC_HOST_ACTION_NONE: 486 case IBMVFC_HOST_ACTION_TGT_ADD: 487 vhost->action = action; 488 break; 489 default: 490 break; 491 }; 492 break; 493 case IBMVFC_HOST_ACTION_TGT_INIT: 494 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 495 vhost->action = action; 496 break; 497 case IBMVFC_HOST_ACTION_INIT: 498 case IBMVFC_HOST_ACTION_TGT_DEL: 499 case IBMVFC_HOST_ACTION_QUERY_TGTS: 500 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 501 case IBMVFC_HOST_ACTION_TGT_ADD: 502 case IBMVFC_HOST_ACTION_NONE: 503 default: 504 vhost->action = action; 505 break; 506 }; 507} 508 509/** 510 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 511 * @vhost: ibmvfc host struct 512 * 513 * Return value: 514 * nothing 515 **/ 516static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 517{ 518 if (vhost->action == IBMVFC_HOST_ACTION_NONE) { 519 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 520 scsi_block_requests(vhost->host); 521 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 522 } 523 } else 524 vhost->reinit = 1; 525 526 wake_up(&vhost->work_wait_q); 527} 528 529/** 530 * ibmvfc_link_down - Handle a link down event from the adapter 531 * @vhost: ibmvfc host struct 532 * @state: ibmvfc host state to enter 533 * 534 **/ 535static void ibmvfc_link_down(struct ibmvfc_host *vhost, 536 enum ibmvfc_host_state state) 537{ 538 struct ibmvfc_target *tgt; 539 540 ENTER; 541 scsi_block_requests(vhost->host); 542 list_for_each_entry(tgt, &vhost->targets, queue) 543 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 544 ibmvfc_set_host_state(vhost, state); 545 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 546 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 547 wake_up(&vhost->work_wait_q); 548 LEAVE; 549} 550 551/** 552 * ibmvfc_init_host - Start host initialization 553 * @vhost: ibmvfc host struct 554 * @relogin: is this a re-login? 555 * 556 * Return value: 557 * nothing 558 **/ 559static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin) 560{ 561 struct ibmvfc_target *tgt; 562 563 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 564 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 565 dev_err(vhost->dev, 566 "Host initialization retries exceeded. Taking adapter offline\n"); 567 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 568 return; 569 } 570 } 571 572 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 573 if (!relogin) { 574 memset(vhost->async_crq.msgs, 0, PAGE_SIZE); 575 vhost->async_crq.cur = 0; 576 } 577 578 list_for_each_entry(tgt, &vhost->targets, queue) 579 tgt->need_login = 1; 580 scsi_block_requests(vhost->host); 581 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 582 vhost->job_step = ibmvfc_npiv_login; 583 wake_up(&vhost->work_wait_q); 584 } 585} 586 587/** 588 * ibmvfc_send_crq - Send a CRQ 589 * @vhost: ibmvfc host struct 590 * @word1: the first 64 bits of the data 591 * @word2: the second 64 bits of the data 592 * 593 * Return value: 594 * 0 on success / other on failure 595 **/ 596static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 597{ 598 struct vio_dev *vdev = to_vio_dev(vhost->dev); 599 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 600} 601 602/** 603 * ibmvfc_send_crq_init - Send a CRQ init message 604 * @vhost: ibmvfc host struct 605 * 606 * Return value: 607 * 0 on success / other on failure 608 **/ 609static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 610{ 611 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 612 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 613} 614 615/** 616 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 617 * @vhost: ibmvfc host struct 618 * 619 * Return value: 620 * 0 on success / other on failure 621 **/ 622static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 623{ 624 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 625 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 626} 627 628/** 629 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 630 * @vhost: ibmvfc host struct 631 * 632 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 633 * the crq with the hypervisor. 634 **/ 635static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 636{ 637 long rc; 638 struct vio_dev *vdev = to_vio_dev(vhost->dev); 639 struct ibmvfc_crq_queue *crq = &vhost->crq; 640 641 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 642 free_irq(vdev->irq, vhost); 643 do { 644 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 645 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 646 647 vhost->state = IBMVFC_NO_CRQ; 648 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 649 free_page((unsigned long)crq->msgs); 650} 651 652/** 653 * ibmvfc_reenable_crq_queue - reenables the CRQ 654 * @vhost: ibmvfc host struct 655 * 656 * Return value: 657 * 0 on success / other on failure 658 **/ 659static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 660{ 661 int rc; 662 struct vio_dev *vdev = to_vio_dev(vhost->dev); 663 664 /* Re-enable the CRQ */ 665 do { 666 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 667 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 668 669 if (rc) 670 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 671 672 return rc; 673} 674 675/** 676 * ibmvfc_reset_crq - resets a crq after a failure 677 * @vhost: ibmvfc host struct 678 * 679 * Return value: 680 * 0 on success / other on failure 681 **/ 682static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 683{ 684 int rc; 685 struct vio_dev *vdev = to_vio_dev(vhost->dev); 686 struct ibmvfc_crq_queue *crq = &vhost->crq; 687 688 /* Close the CRQ */ 689 do { 690 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 691 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 692 693 vhost->state = IBMVFC_NO_CRQ; 694 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 695 696 /* Clean out the queue */ 697 memset(crq->msgs, 0, PAGE_SIZE); 698 crq->cur = 0; 699 700 /* And re-open it again */ 701 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 702 crq->msg_token, PAGE_SIZE); 703 704 if (rc == H_CLOSED) 705 /* Adapter is good, but other end is not ready */ 706 dev_warn(vhost->dev, "Partner adapter not ready\n"); 707 else if (rc != 0) 708 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 709 710 return rc; 711} 712 713/** 714 * ibmvfc_valid_event - Determines if event is valid. 715 * @pool: event_pool that contains the event 716 * @evt: ibmvfc event to be checked for validity 717 * 718 * Return value: 719 * 1 if event is valid / 0 if event is not valid 720 **/ 721static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 722 struct ibmvfc_event *evt) 723{ 724 int index = evt - pool->events; 725 if (index < 0 || index >= pool->size) /* outside of bounds */ 726 return 0; 727 if (evt != pool->events + index) /* unaligned */ 728 return 0; 729 return 1; 730} 731 732/** 733 * ibmvfc_free_event - Free the specified event 734 * @evt: ibmvfc_event to be freed 735 * 736 **/ 737static void ibmvfc_free_event(struct ibmvfc_event *evt) 738{ 739 struct ibmvfc_host *vhost = evt->vhost; 740 struct ibmvfc_event_pool *pool = &vhost->pool; 741 742 BUG_ON(!ibmvfc_valid_event(pool, evt)); 743 BUG_ON(atomic_inc_return(&evt->free) != 1); 744 list_add_tail(&evt->queue, &vhost->free); 745} 746 747/** 748 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 749 * @evt: ibmvfc event struct 750 * 751 * This function does not setup any error status, that must be done 752 * before this function gets called. 753 **/ 754static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 755{ 756 struct scsi_cmnd *cmnd = evt->cmnd; 757 758 if (cmnd) { 759 scsi_dma_unmap(cmnd); 760 cmnd->scsi_done(cmnd); 761 } 762 763 if (evt->eh_comp) 764 complete(evt->eh_comp); 765 766 ibmvfc_free_event(evt); 767} 768 769/** 770 * ibmvfc_fail_request - Fail request with specified error code 771 * @evt: ibmvfc event struct 772 * @error_code: error code to fail request with 773 * 774 * Return value: 775 * none 776 **/ 777static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 778{ 779 if (evt->cmnd) { 780 evt->cmnd->result = (error_code << 16); 781 evt->done = ibmvfc_scsi_eh_done; 782 } else 783 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; 784 785 list_del(&evt->queue); 786 del_timer(&evt->timer); 787 ibmvfc_trc_end(evt); 788 evt->done(evt); 789} 790 791/** 792 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 793 * @vhost: ibmvfc host struct 794 * @error_code: error code to fail requests with 795 * 796 * Return value: 797 * none 798 **/ 799static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 800{ 801 struct ibmvfc_event *evt, *pos; 802 803 ibmvfc_dbg(vhost, "Purging all requests\n"); 804 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 805 ibmvfc_fail_request(evt, error_code); 806} 807 808/** 809 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 810 * @vhost: struct ibmvfc host to reset 811 **/ 812static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 813{ 814 int rc; 815 816 scsi_block_requests(vhost->host); 817 ibmvfc_purge_requests(vhost, DID_ERROR); 818 if ((rc = ibmvfc_reset_crq(vhost)) || 819 (rc = ibmvfc_send_crq_init(vhost)) || 820 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 821 dev_err(vhost->dev, "Error after reset rc=%d\n", rc); 822 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 823 } else 824 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 825} 826 827/** 828 * ibmvfc_reset_host - Reset the connection to the server 829 * @vhost: struct ibmvfc host to reset 830 **/ 831static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 832{ 833 unsigned long flags; 834 835 spin_lock_irqsave(vhost->host->host_lock, flags); 836 __ibmvfc_reset_host(vhost); 837 spin_unlock_irqrestore(vhost->host->host_lock, flags); 838} 839 840/** 841 * ibmvfc_retry_host_init - Retry host initialization if allowed 842 * @vhost: ibmvfc host struct 843 * 844 **/ 845static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 846{ 847 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 848 vhost->delay_init = 1; 849 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 850 dev_err(vhost->dev, 851 "Host initialization retries exceeded. Taking adapter offline\n"); 852 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 853 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 854 __ibmvfc_reset_host(vhost); 855 else 856 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 857 } 858 859 wake_up(&vhost->work_wait_q); 860} 861 862/** 863 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 864 * @starget: scsi target struct 865 * 866 * Return value: 867 * ibmvfc_target struct / NULL if not found 868 **/ 869static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 870{ 871 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 872 struct ibmvfc_host *vhost = shost_priv(shost); 873 struct ibmvfc_target *tgt; 874 875 list_for_each_entry(tgt, &vhost->targets, queue) 876 if (tgt->target_id == starget->id) { 877 kref_get(&tgt->kref); 878 return tgt; 879 } 880 return NULL; 881} 882 883/** 884 * ibmvfc_get_target - Find the specified scsi_target 885 * @starget: scsi target struct 886 * 887 * Return value: 888 * ibmvfc_target struct / NULL if not found 889 **/ 890static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 891{ 892 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 893 struct ibmvfc_target *tgt; 894 unsigned long flags; 895 896 spin_lock_irqsave(shost->host_lock, flags); 897 tgt = __ibmvfc_get_target(starget); 898 spin_unlock_irqrestore(shost->host_lock, flags); 899 return tgt; 900} 901 902/** 903 * ibmvfc_get_host_speed - Get host port speed 904 * @shost: scsi host struct 905 * 906 * Return value: 907 * none 908 **/ 909static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 910{ 911 struct ibmvfc_host *vhost = shost_priv(shost); 912 unsigned long flags; 913 914 spin_lock_irqsave(shost->host_lock, flags); 915 if (vhost->state == IBMVFC_ACTIVE) { 916 switch (vhost->login_buf->resp.link_speed / 100) { 917 case 1: 918 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 919 break; 920 case 2: 921 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 922 break; 923 case 4: 924 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 925 break; 926 case 8: 927 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 928 break; 929 case 10: 930 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 931 break; 932 case 16: 933 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 934 break; 935 default: 936 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 937 vhost->login_buf->resp.link_speed / 100); 938 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 939 break; 940 } 941 } else 942 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 943 spin_unlock_irqrestore(shost->host_lock, flags); 944} 945 946/** 947 * ibmvfc_get_host_port_state - Get host port state 948 * @shost: scsi host struct 949 * 950 * Return value: 951 * none 952 **/ 953static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 954{ 955 struct ibmvfc_host *vhost = shost_priv(shost); 956 unsigned long flags; 957 958 spin_lock_irqsave(shost->host_lock, flags); 959 switch (vhost->state) { 960 case IBMVFC_INITIALIZING: 961 case IBMVFC_ACTIVE: 962 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 963 break; 964 case IBMVFC_LINK_DOWN: 965 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 966 break; 967 case IBMVFC_LINK_DEAD: 968 case IBMVFC_HOST_OFFLINE: 969 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 970 break; 971 case IBMVFC_HALTED: 972 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 973 break; 974 case IBMVFC_NO_CRQ: 975 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 976 break; 977 default: 978 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 979 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 980 break; 981 } 982 spin_unlock_irqrestore(shost->host_lock, flags); 983} 984 985/** 986 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 987 * @rport: rport struct 988 * @timeout: timeout value 989 * 990 * Return value: 991 * none 992 **/ 993static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 994{ 995 if (timeout) 996 rport->dev_loss_tmo = timeout; 997 else 998 rport->dev_loss_tmo = 1; 999} 1000 1001/** 1002 * ibmvfc_release_tgt - Free memory allocated for a target 1003 * @kref: kref struct 1004 * 1005 **/ 1006static void ibmvfc_release_tgt(struct kref *kref) 1007{ 1008 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1009 kfree(tgt); 1010} 1011 1012/** 1013 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1014 * @starget: scsi target struct 1015 * 1016 * Return value: 1017 * none 1018 **/ 1019static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1020{ 1021 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1022 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1023 if (tgt) 1024 kref_put(&tgt->kref, ibmvfc_release_tgt); 1025} 1026 1027/** 1028 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1029 * @starget: scsi target struct 1030 * 1031 * Return value: 1032 * none 1033 **/ 1034static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1035{ 1036 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1037 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1038 if (tgt) 1039 kref_put(&tgt->kref, ibmvfc_release_tgt); 1040} 1041 1042/** 1043 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1044 * @starget: scsi target struct 1045 * 1046 * Return value: 1047 * none 1048 **/ 1049static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1050{ 1051 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1052 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1053 if (tgt) 1054 kref_put(&tgt->kref, ibmvfc_release_tgt); 1055} 1056 1057/** 1058 * ibmvfc_wait_while_resetting - Wait while the host resets 1059 * @vhost: ibmvfc host struct 1060 * 1061 * Return value: 1062 * 0 on success / other on failure 1063 **/ 1064static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1065{ 1066 long timeout = wait_event_timeout(vhost->init_wait_q, 1067 ((vhost->state == IBMVFC_ACTIVE || 1068 vhost->state == IBMVFC_HOST_OFFLINE || 1069 vhost->state == IBMVFC_LINK_DEAD) && 1070 vhost->action == IBMVFC_HOST_ACTION_NONE), 1071 (init_timeout * HZ)); 1072 1073 return timeout ? 0 : -EIO; 1074} 1075 1076/** 1077 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1078 * @shost: scsi host struct 1079 * 1080 * Return value: 1081 * 0 on success / other on failure 1082 **/ 1083static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1084{ 1085 struct ibmvfc_host *vhost = shost_priv(shost); 1086 1087 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1088 ibmvfc_reset_host(vhost); 1089 return ibmvfc_wait_while_resetting(vhost); 1090} 1091 1092/** 1093 * ibmvfc_gather_partition_info - Gather info about the LPAR 1094 * 1095 * Return value: 1096 * none 1097 **/ 1098static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1099{ 1100 struct device_node *rootdn; 1101 const char *name; 1102 const unsigned int *num; 1103 1104 rootdn = of_find_node_by_path("/"); 1105 if (!rootdn) 1106 return; 1107 1108 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1109 if (name) 1110 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1111 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1112 if (num) 1113 vhost->partition_number = *num; 1114 of_node_put(rootdn); 1115} 1116 1117/** 1118 * ibmvfc_set_login_info - Setup info for NPIV login 1119 * @vhost: ibmvfc host struct 1120 * 1121 * Return value: 1122 * none 1123 **/ 1124static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1125{ 1126 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1127 struct device_node *of_node = vhost->dev->archdata.of_node; 1128 const char *location; 1129 1130 memset(login_info, 0, sizeof(*login_info)); 1131 1132 login_info->ostype = IBMVFC_OS_LINUX; 1133 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; 1134 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); 1135 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); 1136 login_info->partition_num = vhost->partition_number; 1137 login_info->vfc_frame_version = 1; 1138 login_info->fcp_version = 3; 1139 if (vhost->client_migrated) 1140 login_info->flags = IBMVFC_CLIENT_MIGRATED; 1141 1142 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1143 login_info->capabilities = IBMVFC_CAN_MIGRATE; 1144 login_info->async.va = vhost->async_crq.msg_token; 1145 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); 1146 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1147 strncpy(login_info->device_name, 1148 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1149 1150 location = of_get_property(of_node, "ibm,loc-code", NULL); 1151 location = location ? location : dev_name(vhost->dev); 1152 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1153} 1154 1155/** 1156 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1157 * @vhost: ibmvfc host who owns the event pool 1158 * 1159 * Returns zero on success. 1160 **/ 1161static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1162{ 1163 int i; 1164 struct ibmvfc_event_pool *pool = &vhost->pool; 1165 1166 ENTER; 1167 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1168 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1169 if (!pool->events) 1170 return -ENOMEM; 1171 1172 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1173 pool->size * sizeof(*pool->iu_storage), 1174 &pool->iu_token, 0); 1175 1176 if (!pool->iu_storage) { 1177 kfree(pool->events); 1178 return -ENOMEM; 1179 } 1180 1181 for (i = 0; i < pool->size; ++i) { 1182 struct ibmvfc_event *evt = &pool->events[i]; 1183 atomic_set(&evt->free, 1); 1184 evt->crq.valid = 0x80; 1185 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); 1186 evt->xfer_iu = pool->iu_storage + i; 1187 evt->vhost = vhost; 1188 evt->ext_list = NULL; 1189 list_add_tail(&evt->queue, &vhost->free); 1190 } 1191 1192 LEAVE; 1193 return 0; 1194} 1195 1196/** 1197 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1198 * @vhost: ibmvfc host who owns the event pool 1199 * 1200 **/ 1201static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1202{ 1203 int i; 1204 struct ibmvfc_event_pool *pool = &vhost->pool; 1205 1206 ENTER; 1207 for (i = 0; i < pool->size; ++i) { 1208 list_del(&pool->events[i].queue); 1209 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1210 if (pool->events[i].ext_list) 1211 dma_pool_free(vhost->sg_pool, 1212 pool->events[i].ext_list, 1213 pool->events[i].ext_list_token); 1214 } 1215 1216 kfree(pool->events); 1217 dma_free_coherent(vhost->dev, 1218 pool->size * sizeof(*pool->iu_storage), 1219 pool->iu_storage, pool->iu_token); 1220 LEAVE; 1221} 1222 1223/** 1224 * ibmvfc_get_event - Gets the next free event in pool 1225 * @vhost: ibmvfc host struct 1226 * 1227 * Returns a free event from the pool. 1228 **/ 1229static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1230{ 1231 struct ibmvfc_event *evt; 1232 1233 BUG_ON(list_empty(&vhost->free)); 1234 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1235 atomic_set(&evt->free, 0); 1236 list_del(&evt->queue); 1237 return evt; 1238} 1239 1240/** 1241 * ibmvfc_init_event - Initialize fields in an event struct that are always 1242 * required. 1243 * @evt: The event 1244 * @done: Routine to call when the event is responded to 1245 * @format: SRP or MAD format 1246 **/ 1247static void ibmvfc_init_event(struct ibmvfc_event *evt, 1248 void (*done) (struct ibmvfc_event *), u8 format) 1249{ 1250 evt->cmnd = NULL; 1251 evt->sync_iu = NULL; 1252 evt->crq.format = format; 1253 evt->done = done; 1254 evt->eh_comp = NULL; 1255} 1256 1257/** 1258 * ibmvfc_map_sg_list - Initialize scatterlist 1259 * @scmd: scsi command struct 1260 * @nseg: number of scatterlist segments 1261 * @md: memory descriptor list to initialize 1262 **/ 1263static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1264 struct srp_direct_buf *md) 1265{ 1266 int i; 1267 struct scatterlist *sg; 1268 1269 scsi_for_each_sg(scmd, sg, nseg, i) { 1270 md[i].va = sg_dma_address(sg); 1271 md[i].len = sg_dma_len(sg); 1272 md[i].key = 0; 1273 } 1274} 1275 1276/** 1277 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1278 * @scmd: Scsi_Cmnd with the scatterlist 1279 * @evt: ibmvfc event struct 1280 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1281 * @dev: device for which to map dma memory 1282 * 1283 * Returns: 1284 * 0 on success / non-zero on failure 1285 **/ 1286static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1287 struct ibmvfc_event *evt, 1288 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1289{ 1290 1291 int sg_mapped; 1292 struct srp_direct_buf *data = &vfc_cmd->ioba; 1293 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1294 1295 sg_mapped = scsi_dma_map(scmd); 1296 if (!sg_mapped) { 1297 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; 1298 return 0; 1299 } else if (unlikely(sg_mapped < 0)) { 1300 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1301 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1302 return sg_mapped; 1303 } 1304 1305 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1306 vfc_cmd->flags |= IBMVFC_WRITE; 1307 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1308 } else { 1309 vfc_cmd->flags |= IBMVFC_READ; 1310 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1311 } 1312 1313 if (sg_mapped == 1) { 1314 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1315 return 0; 1316 } 1317 1318 vfc_cmd->flags |= IBMVFC_SCATTERLIST; 1319 1320 if (!evt->ext_list) { 1321 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1322 &evt->ext_list_token); 1323 1324 if (!evt->ext_list) { 1325 scsi_dma_unmap(scmd); 1326 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1327 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1328 return -ENOMEM; 1329 } 1330 } 1331 1332 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1333 1334 data->va = evt->ext_list_token; 1335 data->len = sg_mapped * sizeof(struct srp_direct_buf); 1336 data->key = 0; 1337 return 0; 1338} 1339 1340/** 1341 * ibmvfc_timeout - Internal command timeout handler 1342 * @evt: struct ibmvfc_event that timed out 1343 * 1344 * Called when an internally generated command times out 1345 **/ 1346static void ibmvfc_timeout(struct ibmvfc_event *evt) 1347{ 1348 struct ibmvfc_host *vhost = evt->vhost; 1349 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1350 ibmvfc_reset_host(vhost); 1351} 1352 1353/** 1354 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1355 * @evt: event to be sent 1356 * @vhost: ibmvfc host struct 1357 * @timeout: timeout in seconds - 0 means do not time command 1358 * 1359 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1360 **/ 1361static int ibmvfc_send_event(struct ibmvfc_event *evt, 1362 struct ibmvfc_host *vhost, unsigned long timeout) 1363{ 1364 u64 *crq_as_u64 = (u64 *) &evt->crq; 1365 int rc; 1366 1367 /* Copy the IU into the transfer area */ 1368 *evt->xfer_iu = evt->iu; 1369 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1370 evt->xfer_iu->cmd.tag = (u64)evt; 1371 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1372 evt->xfer_iu->mad_common.tag = (u64)evt; 1373 else 1374 BUG(); 1375 1376 list_add_tail(&evt->queue, &vhost->sent); 1377 init_timer(&evt->timer); 1378 1379 if (timeout) { 1380 evt->timer.data = (unsigned long) evt; 1381 evt->timer.expires = jiffies + (timeout * HZ); 1382 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; 1383 add_timer(&evt->timer); 1384 } 1385 1386 mb(); 1387 1388 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { 1389 list_del(&evt->queue); 1390 del_timer(&evt->timer); 1391 1392 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1393 * Firmware will send a CRQ with a transport event (0xFF) to 1394 * tell this client what has happened to the transport. This 1395 * will be handled in ibmvfc_handle_crq() 1396 */ 1397 if (rc == H_CLOSED) { 1398 if (printk_ratelimit()) 1399 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1400 if (evt->cmnd) 1401 scsi_dma_unmap(evt->cmnd); 1402 ibmvfc_free_event(evt); 1403 return SCSI_MLQUEUE_HOST_BUSY; 1404 } 1405 1406 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1407 if (evt->cmnd) { 1408 evt->cmnd->result = DID_ERROR << 16; 1409 evt->done = ibmvfc_scsi_eh_done; 1410 } else 1411 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; 1412 1413 evt->done(evt); 1414 } else 1415 ibmvfc_trc_start(evt); 1416 1417 return 0; 1418} 1419 1420/** 1421 * ibmvfc_log_error - Log an error for the failed command if appropriate 1422 * @evt: ibmvfc event to log 1423 * 1424 **/ 1425static void ibmvfc_log_error(struct ibmvfc_event *evt) 1426{ 1427 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1428 struct ibmvfc_host *vhost = evt->vhost; 1429 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1430 struct scsi_cmnd *cmnd = evt->cmnd; 1431 const char *err = unknown_error; 1432 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 1433 int logerr = 0; 1434 int rsp_code = 0; 1435 1436 if (index >= 0) { 1437 logerr = cmd_status[index].log; 1438 err = cmd_status[index].name; 1439 } 1440 1441 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1442 return; 1443 1444 if (rsp->flags & FCP_RSP_LEN_VALID) 1445 rsp_code = rsp->data.info.rsp_code; 1446 1447 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1448 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1449 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1450 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1451} 1452 1453/** 1454 * ibmvfc_scsi_done - Handle responses from commands 1455 * @evt: ibmvfc event to be handled 1456 * 1457 * Used as a callback when sending scsi cmds. 1458 **/ 1459static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1460{ 1461 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1462 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1463 struct scsi_cmnd *cmnd = evt->cmnd; 1464 u32 rsp_len = 0; 1465 u32 sense_len = rsp->fcp_sense_len; 1466 1467 if (cmnd) { 1468 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) 1469 scsi_set_resid(cmnd, vfc_cmd->adapter_resid); 1470 else if (rsp->flags & FCP_RESID_UNDER) 1471 scsi_set_resid(cmnd, rsp->fcp_resid); 1472 else 1473 scsi_set_resid(cmnd, 0); 1474 1475 if (vfc_cmd->status) { 1476 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1477 1478 if (rsp->flags & FCP_RSP_LEN_VALID) 1479 rsp_len = rsp->fcp_rsp_len; 1480 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1481 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1482 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1483 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1484 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED)) 1485 ibmvfc_reinit_host(evt->vhost); 1486 1487 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1488 cmnd->result = (DID_ERROR << 16); 1489 1490 ibmvfc_log_error(evt); 1491 } 1492 1493 if (!cmnd->result && 1494 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1495 cmnd->result = (DID_ERROR << 16); 1496 1497 scsi_dma_unmap(cmnd); 1498 cmnd->scsi_done(cmnd); 1499 } 1500 1501 if (evt->eh_comp) 1502 complete(evt->eh_comp); 1503 1504 ibmvfc_free_event(evt); 1505} 1506 1507/** 1508 * ibmvfc_host_chkready - Check if the host can accept commands 1509 * @vhost: struct ibmvfc host 1510 * 1511 * Returns: 1512 * 1 if host can accept command / 0 if not 1513 **/ 1514static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1515{ 1516 int result = 0; 1517 1518 switch (vhost->state) { 1519 case IBMVFC_LINK_DEAD: 1520 case IBMVFC_HOST_OFFLINE: 1521 result = DID_NO_CONNECT << 16; 1522 break; 1523 case IBMVFC_NO_CRQ: 1524 case IBMVFC_INITIALIZING: 1525 case IBMVFC_HALTED: 1526 case IBMVFC_LINK_DOWN: 1527 result = DID_REQUEUE << 16; 1528 break; 1529 case IBMVFC_ACTIVE: 1530 result = 0; 1531 break; 1532 }; 1533 1534 return result; 1535} 1536 1537/** 1538 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1539 * @cmnd: struct scsi_cmnd to be executed 1540 * @done: Callback function to be called when cmnd is completed 1541 * 1542 * Returns: 1543 * 0 on success / other on failure 1544 **/ 1545static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, 1546 void (*done) (struct scsi_cmnd *)) 1547{ 1548 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1549 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1550 struct ibmvfc_cmd *vfc_cmd; 1551 struct ibmvfc_event *evt; 1552 u8 tag[2]; 1553 int rc; 1554 1555 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1556 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1557 cmnd->result = rc; 1558 done(cmnd); 1559 return 0; 1560 } 1561 1562 cmnd->result = (DID_OK << 16); 1563 evt = ibmvfc_get_event(vhost); 1564 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1565 evt->cmnd = cmnd; 1566 cmnd->scsi_done = done; 1567 vfc_cmd = &evt->iu.cmd; 1568 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1569 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1570 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); 1571 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; 1572 vfc_cmd->payload_len = sizeof(vfc_cmd->iu); 1573 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); 1574 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; 1575 vfc_cmd->tgt_scsi_id = rport->port_id; 1576 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); 1577 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1578 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1579 1580 if (scsi_populate_tag_msg(cmnd, tag)) { 1581 vfc_cmd->task_tag = tag[1]; 1582 switch (tag[0]) { 1583 case MSG_SIMPLE_TAG: 1584 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1585 break; 1586 case MSG_HEAD_TAG: 1587 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; 1588 break; 1589 case MSG_ORDERED_TAG: 1590 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; 1591 break; 1592 }; 1593 } 1594 1595 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1596 return ibmvfc_send_event(evt, vhost, 0); 1597 1598 ibmvfc_free_event(evt); 1599 if (rc == -ENOMEM) 1600 return SCSI_MLQUEUE_HOST_BUSY; 1601 1602 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1603 scmd_printk(KERN_ERR, cmnd, 1604 "Failed to map DMA buffer for command. rc=%d\n", rc); 1605 1606 cmnd->result = DID_ERROR << 16; 1607 done(cmnd); 1608 return 0; 1609} 1610 1611/** 1612 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1613 * @evt: ibmvfc event struct 1614 * 1615 **/ 1616static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1617{ 1618 /* copy the response back */ 1619 if (evt->sync_iu) 1620 *evt->sync_iu = *evt->xfer_iu; 1621 1622 complete(&evt->comp); 1623} 1624 1625/** 1626 * ibmvfc_reset_device - Reset the device with the specified reset type 1627 * @sdev: scsi device to reset 1628 * @type: reset type 1629 * @desc: reset type description for log messages 1630 * 1631 * Returns: 1632 * 0 on success / other on failure 1633 **/ 1634static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1635{ 1636 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1637 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1638 struct ibmvfc_cmd *tmf; 1639 struct ibmvfc_event *evt = NULL; 1640 union ibmvfc_iu rsp_iu; 1641 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1642 int rsp_rc = -EBUSY; 1643 unsigned long flags; 1644 int rsp_code = 0; 1645 1646 spin_lock_irqsave(vhost->host->host_lock, flags); 1647 if (vhost->state == IBMVFC_ACTIVE) { 1648 evt = ibmvfc_get_event(vhost); 1649 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1650 1651 tmf = &evt->iu.cmd; 1652 memset(tmf, 0, sizeof(*tmf)); 1653 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1654 tmf->resp.len = sizeof(tmf->rsp); 1655 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1656 tmf->payload_len = sizeof(tmf->iu); 1657 tmf->resp_len = sizeof(tmf->rsp); 1658 tmf->cancel_key = (unsigned long)sdev->hostdata; 1659 tmf->tgt_scsi_id = rport->port_id; 1660 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1661 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1662 tmf->iu.tmf_flags = type; 1663 evt->sync_iu = &rsp_iu; 1664 1665 init_completion(&evt->comp); 1666 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1667 } 1668 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1669 1670 if (rsp_rc != 0) { 1671 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 1672 desc, rsp_rc); 1673 return -EIO; 1674 } 1675 1676 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 1677 wait_for_completion(&evt->comp); 1678 1679 if (rsp_iu.cmd.status) { 1680 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 1681 rsp_code = fc_rsp->data.info.rsp_code; 1682 1683 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 1684 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 1685 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 1686 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 1687 fc_rsp->scsi_status); 1688 rsp_rc = -EIO; 1689 } else 1690 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 1691 1692 spin_lock_irqsave(vhost->host->host_lock, flags); 1693 ibmvfc_free_event(evt); 1694 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1695 return rsp_rc; 1696} 1697 1698/** 1699 * ibmvfc_abort_task_set - Abort outstanding commands to the device 1700 * @sdev: scsi device to abort commands 1701 * 1702 * This sends an Abort Task Set to the VIOS for the specified device. This does 1703 * NOT send any cancel to the VIOS. That must be done separately. 1704 * 1705 * Returns: 1706 * 0 on success / other on failure 1707 **/ 1708static int ibmvfc_abort_task_set(struct scsi_device *sdev) 1709{ 1710 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1711 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1712 struct ibmvfc_cmd *tmf; 1713 struct ibmvfc_event *evt, *found_evt; 1714 union ibmvfc_iu rsp_iu; 1715 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1716 int rsp_rc = -EBUSY; 1717 unsigned long flags; 1718 int rsp_code = 0; 1719 1720 spin_lock_irqsave(vhost->host->host_lock, flags); 1721 found_evt = NULL; 1722 list_for_each_entry(evt, &vhost->sent, queue) { 1723 if (evt->cmnd && evt->cmnd->device == sdev) { 1724 found_evt = evt; 1725 break; 1726 } 1727 } 1728 1729 if (!found_evt) { 1730 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1731 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 1732 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1733 return 0; 1734 } 1735 1736 if (vhost->state == IBMVFC_ACTIVE) { 1737 evt = ibmvfc_get_event(vhost); 1738 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1739 1740 tmf = &evt->iu.cmd; 1741 memset(tmf, 0, sizeof(*tmf)); 1742 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1743 tmf->resp.len = sizeof(tmf->rsp); 1744 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1745 tmf->payload_len = sizeof(tmf->iu); 1746 tmf->resp_len = sizeof(tmf->rsp); 1747 tmf->cancel_key = (unsigned long)sdev->hostdata; 1748 tmf->tgt_scsi_id = rport->port_id; 1749 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1750 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1751 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 1752 evt->sync_iu = &rsp_iu; 1753 1754 init_completion(&evt->comp); 1755 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1756 } 1757 1758 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1759 1760 if (rsp_rc != 0) { 1761 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 1762 return -EIO; 1763 } 1764 1765 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 1766 wait_for_completion(&evt->comp); 1767 1768 if (rsp_iu.cmd.status) { 1769 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 1770 rsp_code = fc_rsp->data.info.rsp_code; 1771 1772 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 1773 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 1774 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 1775 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 1776 fc_rsp->scsi_status); 1777 rsp_rc = -EIO; 1778 } else 1779 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 1780 1781 spin_lock_irqsave(vhost->host->host_lock, flags); 1782 ibmvfc_free_event(evt); 1783 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1784 return rsp_rc; 1785} 1786 1787/** 1788 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 1789 * @sdev: scsi device to cancel commands 1790 * @type: type of error recovery being performed 1791 * 1792 * This sends a cancel to the VIOS for the specified device. This does 1793 * NOT send any abort to the actual device. That must be done separately. 1794 * 1795 * Returns: 1796 * 0 on success / other on failure 1797 **/ 1798static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 1799{ 1800 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1801 struct scsi_target *starget = scsi_target(sdev); 1802 struct fc_rport *rport = starget_to_rport(starget); 1803 struct ibmvfc_tmf *tmf; 1804 struct ibmvfc_event *evt, *found_evt; 1805 union ibmvfc_iu rsp; 1806 int rsp_rc = -EBUSY; 1807 unsigned long flags; 1808 u16 status; 1809 1810 ENTER; 1811 spin_lock_irqsave(vhost->host->host_lock, flags); 1812 found_evt = NULL; 1813 list_for_each_entry(evt, &vhost->sent, queue) { 1814 if (evt->cmnd && evt->cmnd->device == sdev) { 1815 found_evt = evt; 1816 break; 1817 } 1818 } 1819 1820 if (!found_evt) { 1821 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1822 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 1823 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1824 return 0; 1825 } 1826 1827 if (vhost->state == IBMVFC_ACTIVE) { 1828 evt = ibmvfc_get_event(vhost); 1829 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1830 1831 tmf = &evt->iu.tmf; 1832 memset(tmf, 0, sizeof(*tmf)); 1833 tmf->common.version = 1; 1834 tmf->common.opcode = IBMVFC_TMF_MAD; 1835 tmf->common.length = sizeof(*tmf); 1836 tmf->scsi_id = rport->port_id; 1837 int_to_scsilun(sdev->lun, &tmf->lun); 1838 tmf->flags = (type | IBMVFC_TMF_LUA_VALID); 1839 tmf->cancel_key = (unsigned long)sdev->hostdata; 1840 tmf->my_cancel_key = (unsigned long)starget->hostdata; 1841 1842 evt->sync_iu = &rsp; 1843 init_completion(&evt->comp); 1844 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1845 } 1846 1847 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1848 1849 if (rsp_rc != 0) { 1850 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 1851 return -EIO; 1852 } 1853 1854 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 1855 1856 wait_for_completion(&evt->comp); 1857 status = rsp.mad_common.status; 1858 spin_lock_irqsave(vhost->host->host_lock, flags); 1859 ibmvfc_free_event(evt); 1860 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1861 1862 if (status != IBMVFC_MAD_SUCCESS) { 1863 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 1864 return -EIO; 1865 } 1866 1867 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 1868 return 0; 1869} 1870 1871/** 1872 * ibmvfc_match_target - Match function for specified target 1873 * @evt: ibmvfc event struct 1874 * @device: device to match (starget) 1875 * 1876 * Returns: 1877 * 1 if event matches starget / 0 if event does not match starget 1878 **/ 1879static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 1880{ 1881 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 1882 return 1; 1883 return 0; 1884} 1885 1886/** 1887 * ibmvfc_match_lun - Match function for specified LUN 1888 * @evt: ibmvfc event struct 1889 * @device: device to match (sdev) 1890 * 1891 * Returns: 1892 * 1 if event matches sdev / 0 if event does not match sdev 1893 **/ 1894static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 1895{ 1896 if (evt->cmnd && evt->cmnd->device == device) 1897 return 1; 1898 return 0; 1899} 1900 1901/** 1902 * ibmvfc_wait_for_ops - Wait for ops to complete 1903 * @vhost: ibmvfc host struct 1904 * @device: device to match (starget or sdev) 1905 * @match: match function 1906 * 1907 * Returns: 1908 * SUCCESS / FAILED 1909 **/ 1910static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 1911 int (*match) (struct ibmvfc_event *, void *)) 1912{ 1913 struct ibmvfc_event *evt; 1914 DECLARE_COMPLETION_ONSTACK(comp); 1915 int wait; 1916 unsigned long flags; 1917 signed long timeout = init_timeout * HZ; 1918 1919 ENTER; 1920 do { 1921 wait = 0; 1922 spin_lock_irqsave(vhost->host->host_lock, flags); 1923 list_for_each_entry(evt, &vhost->sent, queue) { 1924 if (match(evt, device)) { 1925 evt->eh_comp = ∁ 1926 wait++; 1927 } 1928 } 1929 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1930 1931 if (wait) { 1932 timeout = wait_for_completion_timeout(&comp, timeout); 1933 1934 if (!timeout) { 1935 wait = 0; 1936 spin_lock_irqsave(vhost->host->host_lock, flags); 1937 list_for_each_entry(evt, &vhost->sent, queue) { 1938 if (match(evt, device)) { 1939 evt->eh_comp = NULL; 1940 wait++; 1941 } 1942 } 1943 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1944 if (wait) 1945 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 1946 LEAVE; 1947 return wait ? FAILED : SUCCESS; 1948 } 1949 } 1950 } while (wait); 1951 1952 LEAVE; 1953 return SUCCESS; 1954} 1955 1956/** 1957 * ibmvfc_eh_abort_handler - Abort a command 1958 * @cmd: scsi command to abort 1959 * 1960 * Returns: 1961 * SUCCESS / FAILED 1962 **/ 1963static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 1964{ 1965 struct scsi_device *sdev = cmd->device; 1966 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1967 int cancel_rc, abort_rc; 1968 int rc = FAILED; 1969 1970 ENTER; 1971 ibmvfc_wait_while_resetting(vhost); 1972 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 1973 abort_rc = ibmvfc_abort_task_set(sdev); 1974 1975 if (!cancel_rc && !abort_rc) 1976 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 1977 1978 LEAVE; 1979 return rc; 1980} 1981 1982/** 1983 * ibmvfc_eh_device_reset_handler - Reset a single LUN 1984 * @cmd: scsi command struct 1985 * 1986 * Returns: 1987 * SUCCESS / FAILED 1988 **/ 1989static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 1990{ 1991 struct scsi_device *sdev = cmd->device; 1992 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1993 int cancel_rc, reset_rc; 1994 int rc = FAILED; 1995 1996 ENTER; 1997 ibmvfc_wait_while_resetting(vhost); 1998 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 1999 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2000 2001 if (!cancel_rc && !reset_rc) 2002 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2003 2004 LEAVE; 2005 return rc; 2006} 2007 2008/** 2009 * ibmvfc_dev_cancel_all - Device iterated cancel all function 2010 * @sdev: scsi device struct 2011 * @data: return code 2012 * 2013 **/ 2014static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data) 2015{ 2016 unsigned long *rc = data; 2017 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2018} 2019 2020/** 2021 * ibmvfc_dev_abort_all - Device iterated abort task set function 2022 * @sdev: scsi device struct 2023 * @data: return code 2024 * 2025 **/ 2026static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) 2027{ 2028 unsigned long *rc = data; 2029 *rc |= ibmvfc_abort_task_set(sdev); 2030} 2031 2032/** 2033 * ibmvfc_eh_target_reset_handler - Reset the target 2034 * @cmd: scsi command struct 2035 * 2036 * Returns: 2037 * SUCCESS / FAILED 2038 **/ 2039static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2040{ 2041 struct scsi_device *sdev = cmd->device; 2042 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2043 struct scsi_target *starget = scsi_target(sdev); 2044 int reset_rc; 2045 int rc = FAILED; 2046 unsigned long cancel_rc = 0; 2047 2048 ENTER; 2049 ibmvfc_wait_while_resetting(vhost); 2050 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); 2051 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2052 2053 if (!cancel_rc && !reset_rc) 2054 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2055 2056 LEAVE; 2057 return rc; 2058} 2059 2060/** 2061 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2062 * @cmd: struct scsi_cmnd having problems 2063 * 2064 **/ 2065static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2066{ 2067 int rc; 2068 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2069 2070 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2071 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2072 return rc ? FAILED : SUCCESS; 2073} 2074 2075/** 2076 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2077 * @rport: rport struct 2078 * 2079 * Return value: 2080 * none 2081 **/ 2082static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2083{ 2084 struct scsi_target *starget = to_scsi_target(&rport->dev); 2085 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2086 struct ibmvfc_host *vhost = shost_priv(shost); 2087 unsigned long cancel_rc = 0; 2088 unsigned long abort_rc = 0; 2089 int rc = FAILED; 2090 2091 ENTER; 2092 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); 2093 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); 2094 2095 if (!cancel_rc && !abort_rc) 2096 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2097 2098 if (rc == FAILED) 2099 ibmvfc_issue_fc_host_lip(shost); 2100 LEAVE; 2101} 2102 2103static const struct { 2104 enum ibmvfc_async_event ae; 2105 const char *desc; 2106} ae_desc [] = { 2107 { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, 2108 { IBMVFC_AE_ELS_LOGO, "LOGO" }, 2109 { IBMVFC_AE_ELS_PRLO, "PRLO" }, 2110 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, 2111 { IBMVFC_AE_SCN_GROUP, "Group SCN" }, 2112 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, 2113 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, 2114 { IBMVFC_AE_LINK_UP, "Link Up" }, 2115 { IBMVFC_AE_LINK_DOWN, "Link Down" }, 2116 { IBMVFC_AE_LINK_DEAD, "Link Dead" }, 2117 { IBMVFC_AE_HALT, "Halt" }, 2118 { IBMVFC_AE_RESUME, "Resume" }, 2119 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, 2120}; 2121 2122static const char *unknown_ae = "Unknown async"; 2123 2124/** 2125 * ibmvfc_get_ae_desc - Get text description for async event 2126 * @ae: async event 2127 * 2128 **/ 2129static const char *ibmvfc_get_ae_desc(u64 ae) 2130{ 2131 int i; 2132 2133 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2134 if (ae_desc[i].ae == ae) 2135 return ae_desc[i].desc; 2136 2137 return unknown_ae; 2138} 2139 2140/** 2141 * ibmvfc_handle_async - Handle an async event from the adapter 2142 * @crq: crq to process 2143 * @vhost: ibmvfc host struct 2144 * 2145 **/ 2146static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2147 struct ibmvfc_host *vhost) 2148{ 2149 const char *desc = ibmvfc_get_ae_desc(crq->event); 2150 2151 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx," 2152 " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name); 2153 2154 switch (crq->event) { 2155 case IBMVFC_AE_LINK_UP: 2156 case IBMVFC_AE_RESUME: 2157 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2158 vhost->delay_init = 1; 2159 __ibmvfc_reset_host(vhost); 2160 break; 2161 case IBMVFC_AE_SCN_FABRIC: 2162 case IBMVFC_AE_SCN_DOMAIN: 2163 vhost->events_to_log |= IBMVFC_AE_RSCN; 2164 vhost->delay_init = 1; 2165 __ibmvfc_reset_host(vhost); 2166 break; 2167 case IBMVFC_AE_SCN_NPORT: 2168 case IBMVFC_AE_SCN_GROUP: 2169 vhost->events_to_log |= IBMVFC_AE_RSCN; 2170 case IBMVFC_AE_ELS_LOGO: 2171 case IBMVFC_AE_ELS_PRLO: 2172 case IBMVFC_AE_ELS_PLOGI: 2173 ibmvfc_reinit_host(vhost); 2174 break; 2175 case IBMVFC_AE_LINK_DOWN: 2176 case IBMVFC_AE_ADAPTER_FAILED: 2177 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2178 break; 2179 case IBMVFC_AE_LINK_DEAD: 2180 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2181 break; 2182 case IBMVFC_AE_HALT: 2183 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2184 break; 2185 default: 2186 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2187 break; 2188 }; 2189} 2190 2191/** 2192 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2193 * @crq: Command/Response queue 2194 * @vhost: ibmvfc host struct 2195 * 2196 **/ 2197static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2198{ 2199 long rc; 2200 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; 2201 2202 switch (crq->valid) { 2203 case IBMVFC_CRQ_INIT_RSP: 2204 switch (crq->format) { 2205 case IBMVFC_CRQ_INIT: 2206 dev_info(vhost->dev, "Partner initialized\n"); 2207 /* Send back a response */ 2208 rc = ibmvfc_send_crq_init_complete(vhost); 2209 if (rc == 0) 2210 ibmvfc_init_host(vhost, 0); 2211 else 2212 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2213 break; 2214 case IBMVFC_CRQ_INIT_COMPLETE: 2215 dev_info(vhost->dev, "Partner initialization complete\n"); 2216 ibmvfc_init_host(vhost, 0); 2217 break; 2218 default: 2219 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2220 } 2221 return; 2222 case IBMVFC_CRQ_XPORT_EVENT: 2223 vhost->state = IBMVFC_NO_CRQ; 2224 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2225 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2226 /* We need to re-setup the interpartition connection */ 2227 dev_info(vhost->dev, "Re-enabling adapter\n"); 2228 vhost->client_migrated = 1; 2229 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2230 if ((rc = ibmvfc_reenable_crq_queue(vhost)) || 2231 (rc = ibmvfc_send_crq_init(vhost))) { 2232 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2233 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); 2234 } else 2235 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2236 } else { 2237 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2238 2239 ibmvfc_purge_requests(vhost, DID_ERROR); 2240 if ((rc = ibmvfc_reset_crq(vhost)) || 2241 (rc = ibmvfc_send_crq_init(vhost))) { 2242 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2243 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); 2244 } else 2245 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2246 } 2247 return; 2248 case IBMVFC_CRQ_CMD_RSP: 2249 break; 2250 default: 2251 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2252 return; 2253 } 2254 2255 if (crq->format == IBMVFC_ASYNC_EVENT) 2256 return; 2257 2258 /* The only kind of payload CRQs we should get are responses to 2259 * things we send. Make sure this response is to something we 2260 * actually sent 2261 */ 2262 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2263 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2264 crq->ioba); 2265 return; 2266 } 2267 2268 if (unlikely(atomic_read(&evt->free))) { 2269 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2270 crq->ioba); 2271 return; 2272 } 2273 2274 del_timer(&evt->timer); 2275 list_del(&evt->queue); 2276 ibmvfc_trc_end(evt); 2277 evt->done(evt); 2278} 2279 2280/** 2281 * ibmvfc_scan_finished - Check if the device scan is done. 2282 * @shost: scsi host struct 2283 * @time: current elapsed time 2284 * 2285 * Returns: 2286 * 0 if scan is not done / 1 if scan is done 2287 **/ 2288static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2289{ 2290 unsigned long flags; 2291 struct ibmvfc_host *vhost = shost_priv(shost); 2292 int done = 0; 2293 2294 spin_lock_irqsave(shost->host_lock, flags); 2295 if (time >= (init_timeout * HZ)) { 2296 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2297 "continuing initialization\n", init_timeout); 2298 done = 1; 2299 } 2300 2301 if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE) 2302 done = 1; 2303 spin_unlock_irqrestore(shost->host_lock, flags); 2304 return done; 2305} 2306 2307/** 2308 * ibmvfc_slave_alloc - Setup the device's task set value 2309 * @sdev: struct scsi_device device to configure 2310 * 2311 * Set the device's task set value so that error handling works as 2312 * expected. 2313 * 2314 * Returns: 2315 * 0 on success / -ENXIO if device does not exist 2316 **/ 2317static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2318{ 2319 struct Scsi_Host *shost = sdev->host; 2320 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2321 struct ibmvfc_host *vhost = shost_priv(shost); 2322 unsigned long flags = 0; 2323 2324 if (!rport || fc_remote_port_chkready(rport)) 2325 return -ENXIO; 2326 2327 spin_lock_irqsave(shost->host_lock, flags); 2328 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2329 spin_unlock_irqrestore(shost->host_lock, flags); 2330 return 0; 2331} 2332 2333/** 2334 * ibmvfc_target_alloc - Setup the target's task set value 2335 * @starget: struct scsi_target 2336 * 2337 * Set the target's task set value so that error handling works as 2338 * expected. 2339 * 2340 * Returns: 2341 * 0 on success / -ENXIO if device does not exist 2342 **/ 2343static int ibmvfc_target_alloc(struct scsi_target *starget) 2344{ 2345 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2346 struct ibmvfc_host *vhost = shost_priv(shost); 2347 unsigned long flags = 0; 2348 2349 spin_lock_irqsave(shost->host_lock, flags); 2350 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2351 spin_unlock_irqrestore(shost->host_lock, flags); 2352 return 0; 2353} 2354 2355/** 2356 * ibmvfc_slave_configure - Configure the device 2357 * @sdev: struct scsi_device device to configure 2358 * 2359 * Enable allow_restart for a device if it is a disk. Adjust the 2360 * queue_depth here also. 2361 * 2362 * Returns: 2363 * 0 2364 **/ 2365static int ibmvfc_slave_configure(struct scsi_device *sdev) 2366{ 2367 struct Scsi_Host *shost = sdev->host; 2368 struct fc_rport *rport = starget_to_rport(sdev->sdev_target); 2369 unsigned long flags = 0; 2370 2371 spin_lock_irqsave(shost->host_lock, flags); 2372 if (sdev->type == TYPE_DISK) 2373 sdev->allow_restart = 1; 2374 2375 if (sdev->tagged_supported) { 2376 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 2377 scsi_activate_tcq(sdev, sdev->queue_depth); 2378 } else 2379 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2380 2381 rport->dev_loss_tmo = dev_loss_tmo; 2382 spin_unlock_irqrestore(shost->host_lock, flags); 2383 return 0; 2384} 2385 2386/** 2387 * ibmvfc_change_queue_depth - Change the device's queue depth 2388 * @sdev: scsi device struct 2389 * @qdepth: depth to set 2390 * 2391 * Return value: 2392 * actual depth set 2393 **/ 2394static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 2395{ 2396 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2397 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2398 2399 scsi_adjust_queue_depth(sdev, 0, qdepth); 2400 return sdev->queue_depth; 2401} 2402 2403/** 2404 * ibmvfc_change_queue_type - Change the device's queue type 2405 * @sdev: scsi device struct 2406 * @tag_type: type of tags to use 2407 * 2408 * Return value: 2409 * actual queue type set 2410 **/ 2411static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) 2412{ 2413 if (sdev->tagged_supported) { 2414 scsi_set_tag_type(sdev, tag_type); 2415 2416 if (tag_type) 2417 scsi_activate_tcq(sdev, sdev->queue_depth); 2418 else 2419 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2420 } else 2421 tag_type = 0; 2422 2423 return tag_type; 2424} 2425 2426static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2427 struct device_attribute *attr, char *buf) 2428{ 2429 struct Scsi_Host *shost = class_to_shost(dev); 2430 struct ibmvfc_host *vhost = shost_priv(shost); 2431 2432 return snprintf(buf, PAGE_SIZE, "%s\n", 2433 vhost->login_buf->resp.partition_name); 2434} 2435 2436static struct device_attribute ibmvfc_host_partition_name = { 2437 .attr = { 2438 .name = "partition_name", 2439 .mode = S_IRUGO, 2440 }, 2441 .show = ibmvfc_show_host_partition_name, 2442}; 2443 2444static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2445 struct device_attribute *attr, char *buf) 2446{ 2447 struct Scsi_Host *shost = class_to_shost(dev); 2448 struct ibmvfc_host *vhost = shost_priv(shost); 2449 2450 return snprintf(buf, PAGE_SIZE, "%s\n", 2451 vhost->login_buf->resp.device_name); 2452} 2453 2454static struct device_attribute ibmvfc_host_device_name = { 2455 .attr = { 2456 .name = "device_name", 2457 .mode = S_IRUGO, 2458 }, 2459 .show = ibmvfc_show_host_device_name, 2460}; 2461 2462static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2463 struct device_attribute *attr, char *buf) 2464{ 2465 struct Scsi_Host *shost = class_to_shost(dev); 2466 struct ibmvfc_host *vhost = shost_priv(shost); 2467 2468 return snprintf(buf, PAGE_SIZE, "%s\n", 2469 vhost->login_buf->resp.port_loc_code); 2470} 2471 2472static struct device_attribute ibmvfc_host_loc_code = { 2473 .attr = { 2474 .name = "port_loc_code", 2475 .mode = S_IRUGO, 2476 }, 2477 .show = ibmvfc_show_host_loc_code, 2478}; 2479 2480static ssize_t ibmvfc_show_host_drc_name(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.drc_name); 2488} 2489 2490static struct device_attribute ibmvfc_host_drc_name = { 2491 .attr = { 2492 .name = "drc_name", 2493 .mode = S_IRUGO, 2494 }, 2495 .show = ibmvfc_show_host_drc_name, 2496}; 2497 2498static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2499 struct device_attribute *attr, char *buf) 2500{ 2501 struct Scsi_Host *shost = class_to_shost(dev); 2502 struct ibmvfc_host *vhost = shost_priv(shost); 2503 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2504} 2505 2506static struct device_attribute ibmvfc_host_npiv_version = { 2507 .attr = { 2508 .name = "npiv_version", 2509 .mode = S_IRUGO, 2510 }, 2511 .show = ibmvfc_show_host_npiv_version, 2512}; 2513 2514/** 2515 * ibmvfc_show_log_level - Show the adapter's error logging level 2516 * @dev: class device struct 2517 * @buf: buffer 2518 * 2519 * Return value: 2520 * number of bytes printed to buffer 2521 **/ 2522static ssize_t ibmvfc_show_log_level(struct device *dev, 2523 struct device_attribute *attr, char *buf) 2524{ 2525 struct Scsi_Host *shost = class_to_shost(dev); 2526 struct ibmvfc_host *vhost = shost_priv(shost); 2527 unsigned long flags = 0; 2528 int len; 2529 2530 spin_lock_irqsave(shost->host_lock, flags); 2531 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2532 spin_unlock_irqrestore(shost->host_lock, flags); 2533 return len; 2534} 2535 2536/** 2537 * ibmvfc_store_log_level - Change the adapter's error logging level 2538 * @dev: class device struct 2539 * @buf: buffer 2540 * 2541 * Return value: 2542 * number of bytes printed to buffer 2543 **/ 2544static ssize_t ibmvfc_store_log_level(struct device *dev, 2545 struct device_attribute *attr, 2546 const char *buf, size_t count) 2547{ 2548 struct Scsi_Host *shost = class_to_shost(dev); 2549 struct ibmvfc_host *vhost = shost_priv(shost); 2550 unsigned long flags = 0; 2551 2552 spin_lock_irqsave(shost->host_lock, flags); 2553 vhost->log_level = simple_strtoul(buf, NULL, 10); 2554 spin_unlock_irqrestore(shost->host_lock, flags); 2555 return strlen(buf); 2556} 2557 2558static struct device_attribute ibmvfc_log_level_attr = { 2559 .attr = { 2560 .name = "log_level", 2561 .mode = S_IRUGO | S_IWUSR, 2562 }, 2563 .show = ibmvfc_show_log_level, 2564 .store = ibmvfc_store_log_level 2565}; 2566 2567#ifdef CONFIG_SCSI_IBMVFC_TRACE 2568/** 2569 * ibmvfc_read_trace - Dump the adapter trace 2570 * @kobj: kobject struct 2571 * @bin_attr: bin_attribute struct 2572 * @buf: buffer 2573 * @off: offset 2574 * @count: buffer size 2575 * 2576 * Return value: 2577 * number of bytes printed to buffer 2578 **/ 2579static ssize_t ibmvfc_read_trace(struct kobject *kobj, 2580 struct bin_attribute *bin_attr, 2581 char *buf, loff_t off, size_t count) 2582{ 2583 struct device *dev = container_of(kobj, struct device, kobj); 2584 struct Scsi_Host *shost = class_to_shost(dev); 2585 struct ibmvfc_host *vhost = shost_priv(shost); 2586 unsigned long flags = 0; 2587 int size = IBMVFC_TRACE_SIZE; 2588 char *src = (char *)vhost->trace; 2589 2590 if (off > size) 2591 return 0; 2592 if (off + count > size) { 2593 size -= off; 2594 count = size; 2595 } 2596 2597 spin_lock_irqsave(shost->host_lock, flags); 2598 memcpy(buf, &src[off], count); 2599 spin_unlock_irqrestore(shost->host_lock, flags); 2600 return count; 2601} 2602 2603static struct bin_attribute ibmvfc_trace_attr = { 2604 .attr = { 2605 .name = "trace", 2606 .mode = S_IRUGO, 2607 }, 2608 .size = 0, 2609 .read = ibmvfc_read_trace, 2610}; 2611#endif 2612 2613static struct device_attribute *ibmvfc_attrs[] = { 2614 &ibmvfc_host_partition_name, 2615 &ibmvfc_host_device_name, 2616 &ibmvfc_host_loc_code, 2617 &ibmvfc_host_drc_name, 2618 &ibmvfc_host_npiv_version, 2619 &ibmvfc_log_level_attr, 2620 NULL 2621}; 2622 2623static struct scsi_host_template driver_template = { 2624 .module = THIS_MODULE, 2625 .name = "IBM POWER Virtual FC Adapter", 2626 .proc_name = IBMVFC_NAME, 2627 .queuecommand = ibmvfc_queuecommand, 2628 .eh_abort_handler = ibmvfc_eh_abort_handler, 2629 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 2630 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 2631 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 2632 .slave_alloc = ibmvfc_slave_alloc, 2633 .slave_configure = ibmvfc_slave_configure, 2634 .target_alloc = ibmvfc_target_alloc, 2635 .scan_finished = ibmvfc_scan_finished, 2636 .change_queue_depth = ibmvfc_change_queue_depth, 2637 .change_queue_type = ibmvfc_change_queue_type, 2638 .cmd_per_lun = 16, 2639 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 2640 .this_id = -1, 2641 .sg_tablesize = SG_ALL, 2642 .max_sectors = IBMVFC_MAX_SECTORS, 2643 .use_clustering = ENABLE_CLUSTERING, 2644 .shost_attrs = ibmvfc_attrs, 2645}; 2646 2647/** 2648 * ibmvfc_next_async_crq - Returns the next entry in async queue 2649 * @vhost: ibmvfc host struct 2650 * 2651 * Returns: 2652 * Pointer to next entry in queue / NULL if empty 2653 **/ 2654static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 2655{ 2656 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 2657 struct ibmvfc_async_crq *crq; 2658 2659 crq = &async_crq->msgs[async_crq->cur]; 2660 if (crq->valid & 0x80) { 2661 if (++async_crq->cur == async_crq->size) 2662 async_crq->cur = 0; 2663 } else 2664 crq = NULL; 2665 2666 return crq; 2667} 2668 2669/** 2670 * ibmvfc_next_crq - Returns the next entry in message queue 2671 * @vhost: ibmvfc host struct 2672 * 2673 * Returns: 2674 * Pointer to next entry in queue / NULL if empty 2675 **/ 2676static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 2677{ 2678 struct ibmvfc_crq_queue *queue = &vhost->crq; 2679 struct ibmvfc_crq *crq; 2680 2681 crq = &queue->msgs[queue->cur]; 2682 if (crq->valid & 0x80) { 2683 if (++queue->cur == queue->size) 2684 queue->cur = 0; 2685 } else 2686 crq = NULL; 2687 2688 return crq; 2689} 2690 2691/** 2692 * ibmvfc_interrupt - Interrupt handler 2693 * @irq: number of irq to handle, not used 2694 * @dev_instance: ibmvfc_host that received interrupt 2695 * 2696 * Returns: 2697 * IRQ_HANDLED 2698 **/ 2699static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 2700{ 2701 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 2702 struct vio_dev *vdev = to_vio_dev(vhost->dev); 2703 struct ibmvfc_crq *crq; 2704 struct ibmvfc_async_crq *async; 2705 unsigned long flags; 2706 int done = 0; 2707 2708 spin_lock_irqsave(vhost->host->host_lock, flags); 2709 vio_disable_interrupts(to_vio_dev(vhost->dev)); 2710 while (!done) { 2711 /* Pull all the valid messages off the CRQ */ 2712 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 2713 ibmvfc_handle_crq(crq, vhost); 2714 crq->valid = 0; 2715 } 2716 2717 /* Pull all the valid messages off the async CRQ */ 2718 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 2719 ibmvfc_handle_async(async, vhost); 2720 async->valid = 0; 2721 } 2722 2723 vio_enable_interrupts(vdev); 2724 if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 2725 vio_disable_interrupts(vdev); 2726 ibmvfc_handle_crq(crq, vhost); 2727 crq->valid = 0; 2728 } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 2729 vio_disable_interrupts(vdev); 2730 ibmvfc_handle_async(async, vhost); 2731 async->valid = 0; 2732 } else 2733 done = 1; 2734 } 2735 2736 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2737 return IRQ_HANDLED; 2738} 2739 2740/** 2741 * ibmvfc_init_tgt - Set the next init job step for the target 2742 * @tgt: ibmvfc target struct 2743 * @job_step: job step to perform 2744 * 2745 **/ 2746static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 2747 void (*job_step) (struct ibmvfc_target *)) 2748{ 2749 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 2750 tgt->job_step = job_step; 2751 wake_up(&tgt->vhost->work_wait_q); 2752} 2753 2754/** 2755 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 2756 * @tgt: ibmvfc target struct 2757 * @job_step: initialization job step 2758 * 2759 **/ 2760static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 2761 void (*job_step) (struct ibmvfc_target *)) 2762{ 2763 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 2764 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2765 wake_up(&tgt->vhost->work_wait_q); 2766 } else 2767 ibmvfc_init_tgt(tgt, job_step); 2768} 2769 2770/* Defined in FC-LS */ 2771static const struct { 2772 int code; 2773 int retry; 2774 int logged_in; 2775} prli_rsp [] = { 2776 { 0, 1, 0 }, 2777 { 1, 0, 1 }, 2778 { 2, 1, 0 }, 2779 { 3, 1, 0 }, 2780 { 4, 0, 0 }, 2781 { 5, 0, 0 }, 2782 { 6, 0, 1 }, 2783 { 7, 0, 0 }, 2784 { 8, 1, 0 }, 2785}; 2786 2787/** 2788 * ibmvfc_get_prli_rsp - Find PRLI response index 2789 * @flags: PRLI response flags 2790 * 2791 **/ 2792static int ibmvfc_get_prli_rsp(u16 flags) 2793{ 2794 int i; 2795 int code = (flags & 0x0f00) >> 8; 2796 2797 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 2798 if (prli_rsp[i].code == code) 2799 return i; 2800 2801 return 0; 2802} 2803 2804/** 2805 * ibmvfc_tgt_prli_done - Completion handler for Process Login 2806 * @evt: ibmvfc event struct 2807 * 2808 **/ 2809static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 2810{ 2811 struct ibmvfc_target *tgt = evt->tgt; 2812 struct ibmvfc_host *vhost = evt->vhost; 2813 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 2814 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 2815 u32 status = rsp->common.status; 2816 int index; 2817 2818 vhost->discovery_threads--; 2819 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2820 switch (status) { 2821 case IBMVFC_MAD_SUCCESS: 2822 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 2823 parms->type, parms->flags, parms->service_parms); 2824 2825 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 2826 index = ibmvfc_get_prli_rsp(parms->flags); 2827 if (prli_rsp[index].logged_in) { 2828 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) { 2829 tgt->need_login = 0; 2830 tgt->ids.roles = 0; 2831 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC) 2832 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 2833 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC) 2834 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 2835 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT); 2836 } else 2837 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2838 } else if (prli_rsp[index].retry) 2839 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2840 else 2841 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2842 } else 2843 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2844 break; 2845 case IBMVFC_MAD_DRIVER_FAILED: 2846 break; 2847 case IBMVFC_MAD_CRQ_ERROR: 2848 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2849 break; 2850 case IBMVFC_MAD_FAILED: 2851 default: 2852 tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 2853 ibmvfc_get_cmd_error(rsp->status, rsp->error), 2854 rsp->status, rsp->error, status); 2855 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 2856 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2857 else 2858 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2859 break; 2860 }; 2861 2862 kref_put(&tgt->kref, ibmvfc_release_tgt); 2863 ibmvfc_free_event(evt); 2864 wake_up(&vhost->work_wait_q); 2865} 2866 2867/** 2868 * ibmvfc_tgt_send_prli - Send a process login 2869 * @tgt: ibmvfc target struct 2870 * 2871 **/ 2872static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 2873{ 2874 struct ibmvfc_process_login *prli; 2875 struct ibmvfc_host *vhost = tgt->vhost; 2876 struct ibmvfc_event *evt; 2877 2878 if (vhost->discovery_threads >= disc_threads) 2879 return; 2880 2881 kref_get(&tgt->kref); 2882 evt = ibmvfc_get_event(vhost); 2883 vhost->discovery_threads++; 2884 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 2885 evt->tgt = tgt; 2886 prli = &evt->iu.prli; 2887 memset(prli, 0, sizeof(*prli)); 2888 prli->common.version = 1; 2889 prli->common.opcode = IBMVFC_PROCESS_LOGIN; 2890 prli->common.length = sizeof(*prli); 2891 prli->scsi_id = tgt->scsi_id; 2892 2893 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 2894 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; 2895 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; 2896 2897 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 2898 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 2899 vhost->discovery_threads--; 2900 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2901 kref_put(&tgt->kref, ibmvfc_release_tgt); 2902 } else 2903 tgt_dbg(tgt, "Sent process login\n"); 2904} 2905 2906/** 2907 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 2908 * @evt: ibmvfc event struct 2909 * 2910 **/ 2911static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 2912{ 2913 struct ibmvfc_target *tgt = evt->tgt; 2914 struct ibmvfc_host *vhost = evt->vhost; 2915 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 2916 u32 status = rsp->common.status; 2917 2918 vhost->discovery_threads--; 2919 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2920 switch (status) { 2921 case IBMVFC_MAD_SUCCESS: 2922 tgt_dbg(tgt, "Port Login succeeded\n"); 2923 if (tgt->ids.port_name && 2924 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 2925 vhost->reinit = 1; 2926 tgt_dbg(tgt, "Port re-init required\n"); 2927 break; 2928 } 2929 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 2930 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 2931 tgt->ids.port_id = tgt->scsi_id; 2932 memcpy(&tgt->service_parms, &rsp->service_parms, 2933 sizeof(tgt->service_parms)); 2934 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 2935 sizeof(tgt->service_parms_change)); 2936 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 2937 break; 2938 case IBMVFC_MAD_DRIVER_FAILED: 2939 break; 2940 case IBMVFC_MAD_CRQ_ERROR: 2941 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 2942 break; 2943 case IBMVFC_MAD_FAILED: 2944 default: 2945 tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 2946 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 2947 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 2948 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); 2949 2950 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 2951 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 2952 else 2953 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2954 break; 2955 }; 2956 2957 kref_put(&tgt->kref, ibmvfc_release_tgt); 2958 ibmvfc_free_event(evt); 2959 wake_up(&vhost->work_wait_q); 2960} 2961 2962/** 2963 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 2964 * @tgt: ibmvfc target struct 2965 * 2966 **/ 2967static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 2968{ 2969 struct ibmvfc_port_login *plogi; 2970 struct ibmvfc_host *vhost = tgt->vhost; 2971 struct ibmvfc_event *evt; 2972 2973 if (vhost->discovery_threads >= disc_threads) 2974 return; 2975 2976 kref_get(&tgt->kref); 2977 evt = ibmvfc_get_event(vhost); 2978 vhost->discovery_threads++; 2979 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 2980 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 2981 evt->tgt = tgt; 2982 plogi = &evt->iu.plogi; 2983 memset(plogi, 0, sizeof(*plogi)); 2984 plogi->common.version = 1; 2985 plogi->common.opcode = IBMVFC_PORT_LOGIN; 2986 plogi->common.length = sizeof(*plogi); 2987 plogi->scsi_id = tgt->scsi_id; 2988 2989 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 2990 vhost->discovery_threads--; 2991 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2992 kref_put(&tgt->kref, ibmvfc_release_tgt); 2993 } else 2994 tgt_dbg(tgt, "Sent port login\n"); 2995} 2996 2997/** 2998 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 2999 * @evt: ibmvfc event struct 3000 * 3001 **/ 3002static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3003{ 3004 struct ibmvfc_target *tgt = evt->tgt; 3005 struct ibmvfc_host *vhost = evt->vhost; 3006 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3007 u32 status = rsp->common.status; 3008 3009 vhost->discovery_threads--; 3010 ibmvfc_free_event(evt); 3011 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3012 3013 switch (status) { 3014 case IBMVFC_MAD_SUCCESS: 3015 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3016 break; 3017 case IBMVFC_MAD_DRIVER_FAILED: 3018 kref_put(&tgt->kref, ibmvfc_release_tgt); 3019 wake_up(&vhost->work_wait_q); 3020 return; 3021 case IBMVFC_MAD_FAILED: 3022 default: 3023 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3024 break; 3025 }; 3026 3027 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3028 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3029 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3030 tgt->scsi_id != tgt->new_scsi_id) 3031 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3032 kref_put(&tgt->kref, ibmvfc_release_tgt); 3033 wake_up(&vhost->work_wait_q); 3034} 3035 3036/** 3037 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3038 * @tgt: ibmvfc target struct 3039 * 3040 **/ 3041static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3042{ 3043 struct ibmvfc_implicit_logout *mad; 3044 struct ibmvfc_host *vhost = tgt->vhost; 3045 struct ibmvfc_event *evt; 3046 3047 if (vhost->discovery_threads >= disc_threads) 3048 return; 3049 3050 kref_get(&tgt->kref); 3051 evt = ibmvfc_get_event(vhost); 3052 vhost->discovery_threads++; 3053 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3054 evt->tgt = tgt; 3055 mad = &evt->iu.implicit_logout; 3056 memset(mad, 0, sizeof(*mad)); 3057 mad->common.version = 1; 3058 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; 3059 mad->common.length = sizeof(*mad); 3060 mad->old_scsi_id = tgt->scsi_id; 3061 3062 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3063 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3064 vhost->discovery_threads--; 3065 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3066 kref_put(&tgt->kref, ibmvfc_release_tgt); 3067 } else 3068 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3069} 3070 3071/** 3072 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3073 * @mad: ibmvfc passthru mad struct 3074 * @tgt: ibmvfc target struct 3075 * 3076 * Returns: 3077 * 1 if PLOGI needed / 0 if PLOGI not needed 3078 **/ 3079static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3080 struct ibmvfc_target *tgt) 3081{ 3082 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3083 sizeof(tgt->ids.port_name))) 3084 return 1; 3085 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3086 sizeof(tgt->ids.node_name))) 3087 return 1; 3088 if (mad->fc_iu.response[6] != tgt->scsi_id) 3089 return 1; 3090 return 0; 3091} 3092 3093/** 3094 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3095 * @evt: ibmvfc event struct 3096 * 3097 **/ 3098static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3099{ 3100 struct ibmvfc_target *tgt = evt->tgt; 3101 struct ibmvfc_host *vhost = evt->vhost; 3102 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3103 u32 status = mad->common.status; 3104 u8 fc_reason, fc_explain; 3105 3106 vhost->discovery_threads--; 3107 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3108 3109 switch (status) { 3110 case IBMVFC_MAD_SUCCESS: 3111 tgt_dbg(tgt, "ADISC succeeded\n"); 3112 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3113 tgt->need_login = 1; 3114 break; 3115 case IBMVFC_MAD_DRIVER_FAILED: 3116 break; 3117 case IBMVFC_MAD_FAILED: 3118 default: 3119 tgt->need_login = 1; 3120 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; 3121 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; 3122 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3123 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), 3124 mad->iu.status, mad->iu.error, 3125 ibmvfc_get_fc_type(fc_reason), fc_reason, 3126 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3127 break; 3128 }; 3129 3130 kref_put(&tgt->kref, ibmvfc_release_tgt); 3131 ibmvfc_free_event(evt); 3132 wake_up(&vhost->work_wait_q); 3133} 3134 3135/** 3136 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3137 * @evt: ibmvfc event struct 3138 * 3139 **/ 3140static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3141{ 3142 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3143 3144 memset(mad, 0, sizeof(*mad)); 3145 mad->common.version = 1; 3146 mad->common.opcode = IBMVFC_PASSTHRU; 3147 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 3148 mad->cmd_ioba.va = (u64)evt->crq.ioba + 3149 offsetof(struct ibmvfc_passthru_mad, iu); 3150 mad->cmd_ioba.len = sizeof(mad->iu); 3151 mad->iu.cmd_len = sizeof(mad->fc_iu.payload); 3152 mad->iu.rsp_len = sizeof(mad->fc_iu.response); 3153 mad->iu.cmd.va = (u64)evt->crq.ioba + 3154 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3155 offsetof(struct ibmvfc_passthru_fc_iu, payload); 3156 mad->iu.cmd.len = sizeof(mad->fc_iu.payload); 3157 mad->iu.rsp.va = (u64)evt->crq.ioba + 3158 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3159 offsetof(struct ibmvfc_passthru_fc_iu, response); 3160 mad->iu.rsp.len = sizeof(mad->fc_iu.response); 3161} 3162 3163/** 3164 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3165 * @tgt: ibmvfc target struct 3166 * 3167 **/ 3168static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3169{ 3170 struct ibmvfc_passthru_mad *mad; 3171 struct ibmvfc_host *vhost = tgt->vhost; 3172 struct ibmvfc_event *evt; 3173 3174 if (vhost->discovery_threads >= disc_threads) 3175 return; 3176 3177 kref_get(&tgt->kref); 3178 evt = ibmvfc_get_event(vhost); 3179 vhost->discovery_threads++; 3180 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3181 evt->tgt = tgt; 3182 3183 ibmvfc_init_passthru(evt); 3184 mad = &evt->iu.passthru; 3185 mad->iu.flags = IBMVFC_FC_ELS; 3186 mad->iu.scsi_id = tgt->scsi_id; 3187 3188 mad->fc_iu.payload[0] = IBMVFC_ADISC; 3189 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3190 sizeof(vhost->login_buf->resp.port_name)); 3191 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3192 sizeof(vhost->login_buf->resp.node_name)); 3193 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; 3194 3195 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3196 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3197 vhost->discovery_threads--; 3198 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3199 kref_put(&tgt->kref, ibmvfc_release_tgt); 3200 } else 3201 tgt_dbg(tgt, "Sent ADISC\n"); 3202} 3203 3204/** 3205 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3206 * @evt: ibmvfc event struct 3207 * 3208 **/ 3209static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3210{ 3211 struct ibmvfc_target *tgt = evt->tgt; 3212 struct ibmvfc_host *vhost = evt->vhost; 3213 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3214 u32 status = rsp->common.status; 3215 3216 vhost->discovery_threads--; 3217 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3218 switch (status) { 3219 case IBMVFC_MAD_SUCCESS: 3220 tgt_dbg(tgt, "Query Target succeeded\n"); 3221 tgt->new_scsi_id = rsp->scsi_id; 3222 if (rsp->scsi_id != tgt->scsi_id) 3223 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3224 else 3225 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3226 break; 3227 case IBMVFC_MAD_DRIVER_FAILED: 3228 break; 3229 case IBMVFC_MAD_CRQ_ERROR: 3230 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3231 break; 3232 case IBMVFC_MAD_FAILED: 3233 default: 3234 tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3235 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3236 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3237 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); 3238 3239 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3240 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && 3241 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) 3242 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3243 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3244 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3245 else 3246 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3247 break; 3248 }; 3249 3250 kref_put(&tgt->kref, ibmvfc_release_tgt); 3251 ibmvfc_free_event(evt); 3252 wake_up(&vhost->work_wait_q); 3253} 3254 3255/** 3256 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3257 * @tgt: ibmvfc target struct 3258 * 3259 **/ 3260static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3261{ 3262 struct ibmvfc_query_tgt *query_tgt; 3263 struct ibmvfc_host *vhost = tgt->vhost; 3264 struct ibmvfc_event *evt; 3265 3266 if (vhost->discovery_threads >= disc_threads) 3267 return; 3268 3269 kref_get(&tgt->kref); 3270 evt = ibmvfc_get_event(vhost); 3271 vhost->discovery_threads++; 3272 evt->tgt = tgt; 3273 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3274 query_tgt = &evt->iu.query_tgt; 3275 memset(query_tgt, 0, sizeof(*query_tgt)); 3276 query_tgt->common.version = 1; 3277 query_tgt->common.opcode = IBMVFC_QUERY_TARGET; 3278 query_tgt->common.length = sizeof(*query_tgt); 3279 query_tgt->wwpn = tgt->ids.port_name; 3280 3281 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3282 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3283 vhost->discovery_threads--; 3284 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3285 kref_put(&tgt->kref, ibmvfc_release_tgt); 3286 } else 3287 tgt_dbg(tgt, "Sent Query Target\n"); 3288} 3289 3290/** 3291 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3292 * @vhost: ibmvfc host struct 3293 * @scsi_id: SCSI ID to allocate target for 3294 * 3295 * Returns: 3296 * 0 on success / other on failure 3297 **/ 3298static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3299{ 3300 struct ibmvfc_target *tgt; 3301 unsigned long flags; 3302 3303 spin_lock_irqsave(vhost->host->host_lock, flags); 3304 list_for_each_entry(tgt, &vhost->targets, queue) { 3305 if (tgt->scsi_id == scsi_id) { 3306 if (tgt->need_login) 3307 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3308 goto unlock_out; 3309 } 3310 } 3311 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3312 3313 tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL); 3314 if (!tgt) { 3315 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", 3316 scsi_id); 3317 return -ENOMEM; 3318 } 3319 3320 memset(tgt, 0, sizeof(*tgt)); 3321 tgt->scsi_id = scsi_id; 3322 tgt->new_scsi_id = scsi_id; 3323 tgt->vhost = vhost; 3324 tgt->need_login = 1; 3325 kref_init(&tgt->kref); 3326 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3327 spin_lock_irqsave(vhost->host->host_lock, flags); 3328 list_add_tail(&tgt->queue, &vhost->targets); 3329 3330unlock_out: 3331 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3332 return 0; 3333} 3334 3335/** 3336 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3337 * @vhost: ibmvfc host struct 3338 * 3339 * Returns: 3340 * 0 on success / other on failure 3341 **/ 3342static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3343{ 3344 int i, rc; 3345 3346 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3347 rc = ibmvfc_alloc_target(vhost, 3348 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); 3349 3350 return rc; 3351} 3352 3353/** 3354 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3355 * @evt: ibmvfc event struct 3356 * 3357 **/ 3358static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3359{ 3360 struct ibmvfc_host *vhost = evt->vhost; 3361 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3362 u32 mad_status = rsp->common.status; 3363 3364 switch (mad_status) { 3365 case IBMVFC_MAD_SUCCESS: 3366 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3367 vhost->num_targets = rsp->num_written; 3368 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3369 break; 3370 case IBMVFC_MAD_FAILED: 3371 dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n", 3372 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3373 ibmvfc_retry_host_init(vhost); 3374 break; 3375 case IBMVFC_MAD_DRIVER_FAILED: 3376 break; 3377 default: 3378 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3379 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3380 break; 3381 } 3382 3383 ibmvfc_free_event(evt); 3384 wake_up(&vhost->work_wait_q); 3385} 3386 3387/** 3388 * ibmvfc_discover_targets - Send Discover Targets MAD 3389 * @vhost: ibmvfc host struct 3390 * 3391 **/ 3392static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3393{ 3394 struct ibmvfc_discover_targets *mad; 3395 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3396 3397 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3398 mad = &evt->iu.discover_targets; 3399 memset(mad, 0, sizeof(*mad)); 3400 mad->common.version = 1; 3401 mad->common.opcode = IBMVFC_DISC_TARGETS; 3402 mad->common.length = sizeof(*mad); 3403 mad->bufflen = vhost->disc_buf_sz; 3404 mad->buffer.va = vhost->disc_buf_dma; 3405 mad->buffer.len = vhost->disc_buf_sz; 3406 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3407 3408 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3409 ibmvfc_dbg(vhost, "Sent discover targets\n"); 3410 else 3411 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3412} 3413 3414/** 3415 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 3416 * @evt: ibmvfc event struct 3417 * 3418 **/ 3419static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 3420{ 3421 struct ibmvfc_host *vhost = evt->vhost; 3422 u32 mad_status = evt->xfer_iu->npiv_login.common.status; 3423 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 3424 unsigned int npiv_max_sectors; 3425 3426 switch (mad_status) { 3427 case IBMVFC_MAD_SUCCESS: 3428 ibmvfc_free_event(evt); 3429 break; 3430 case IBMVFC_MAD_FAILED: 3431 dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n", 3432 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3433 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3434 ibmvfc_retry_host_init(vhost); 3435 else 3436 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3437 ibmvfc_free_event(evt); 3438 return; 3439 case IBMVFC_MAD_CRQ_ERROR: 3440 ibmvfc_retry_host_init(vhost); 3441 case IBMVFC_MAD_DRIVER_FAILED: 3442 ibmvfc_free_event(evt); 3443 return; 3444 default: 3445 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 3446 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3447 ibmvfc_free_event(evt); 3448 return; 3449 } 3450 3451 vhost->client_migrated = 0; 3452 3453 if (!(rsp->flags & IBMVFC_NATIVE_FC)) { 3454 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 3455 rsp->flags); 3456 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3457 wake_up(&vhost->work_wait_q); 3458 return; 3459 } 3460 3461 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { 3462 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 3463 rsp->max_cmds); 3464 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3465 wake_up(&vhost->work_wait_q); 3466 return; 3467 } 3468 3469 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); 3470 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 3471 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 3472 rsp->drc_name, npiv_max_sectors); 3473 3474 fc_host_fabric_name(vhost->host) = rsp->node_name; 3475 fc_host_node_name(vhost->host) = rsp->node_name; 3476 fc_host_port_name(vhost->host) = rsp->port_name; 3477 fc_host_port_id(vhost->host) = rsp->scsi_id; 3478 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 3479 fc_host_supported_classes(vhost->host) = 0; 3480 if (rsp->service_parms.class1_parms[0] & 0x80000000) 3481 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 3482 if (rsp->service_parms.class2_parms[0] & 0x80000000) 3483 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 3484 if (rsp->service_parms.class3_parms[0] & 0x80000000) 3485 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 3486 fc_host_maxframe_size(vhost->host) = 3487 rsp->service_parms.common.bb_rcv_sz & 0x0fff; 3488 3489 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; 3490 vhost->host->max_sectors = npiv_max_sectors; 3491 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 3492 wake_up(&vhost->work_wait_q); 3493} 3494 3495/** 3496 * ibmvfc_npiv_login - Sends NPIV login 3497 * @vhost: ibmvfc host struct 3498 * 3499 **/ 3500static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 3501{ 3502 struct ibmvfc_npiv_login_mad *mad; 3503 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3504 3505 ibmvfc_gather_partition_info(vhost); 3506 ibmvfc_set_login_info(vhost); 3507 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 3508 3509 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 3510 mad = &evt->iu.npiv_login; 3511 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 3512 mad->common.version = 1; 3513 mad->common.opcode = IBMVFC_NPIV_LOGIN; 3514 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); 3515 mad->buffer.va = vhost->login_buf_dma; 3516 mad->buffer.len = sizeof(*vhost->login_buf); 3517 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 NPIV login\n"); 3522 else 3523 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3524}; 3525 3526/** 3527 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 3528 * @vhost: ibmvfc host struct 3529 * 3530 * Returns: 3531 * 1 if work to do / 0 if not 3532 **/ 3533static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 3534{ 3535 struct ibmvfc_target *tgt; 3536 3537 list_for_each_entry(tgt, &vhost->targets, queue) { 3538 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 3539 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 3540 return 1; 3541 } 3542 3543 return 0; 3544} 3545 3546/** 3547 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 3548 * @vhost: ibmvfc host struct 3549 * 3550 * Returns: 3551 * 1 if work to do / 0 if not 3552 **/ 3553static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 3554{ 3555 struct ibmvfc_target *tgt; 3556 3557 if (kthread_should_stop()) 3558 return 1; 3559 switch (vhost->action) { 3560 case IBMVFC_HOST_ACTION_NONE: 3561 case IBMVFC_HOST_ACTION_INIT_WAIT: 3562 return 0; 3563 case IBMVFC_HOST_ACTION_TGT_INIT: 3564 case IBMVFC_HOST_ACTION_QUERY_TGTS: 3565 if (vhost->discovery_threads == disc_threads) 3566 return 0; 3567 list_for_each_entry(tgt, &vhost->targets, queue) 3568 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 3569 return 1; 3570 list_for_each_entry(tgt, &vhost->targets, queue) 3571 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 3572 return 0; 3573 return 1; 3574 case IBMVFC_HOST_ACTION_INIT: 3575 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 3576 case IBMVFC_HOST_ACTION_TGT_ADD: 3577 case IBMVFC_HOST_ACTION_TGT_DEL: 3578 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 3579 case IBMVFC_HOST_ACTION_QUERY: 3580 default: 3581 break; 3582 }; 3583 3584 return 1; 3585} 3586 3587/** 3588 * ibmvfc_work_to_do - Is there task level work to do? 3589 * @vhost: ibmvfc host struct 3590 * 3591 * Returns: 3592 * 1 if work to do / 0 if not 3593 **/ 3594static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 3595{ 3596 unsigned long flags; 3597 int rc; 3598 3599 spin_lock_irqsave(vhost->host->host_lock, flags); 3600 rc = __ibmvfc_work_to_do(vhost); 3601 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3602 return rc; 3603} 3604 3605/** 3606 * ibmvfc_log_ae - Log async events if necessary 3607 * @vhost: ibmvfc host struct 3608 * @events: events to log 3609 * 3610 **/ 3611static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 3612{ 3613 if (events & IBMVFC_AE_RSCN) 3614 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 3615 if ((events & IBMVFC_AE_LINKDOWN) && 3616 vhost->state >= IBMVFC_HALTED) 3617 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 3618 if ((events & IBMVFC_AE_LINKUP) && 3619 vhost->state == IBMVFC_INITIALIZING) 3620 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 3621} 3622 3623/** 3624 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 3625 * @tgt: ibmvfc target struct 3626 * 3627 **/ 3628static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 3629{ 3630 struct ibmvfc_host *vhost = tgt->vhost; 3631 struct fc_rport *rport = tgt->rport; 3632 unsigned long flags; 3633 3634 if (rport) { 3635 tgt_dbg(tgt, "Setting rport roles\n"); 3636 fc_remote_port_rolechg(rport, tgt->ids.roles); 3637 spin_lock_irqsave(vhost->host->host_lock, flags); 3638 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3639 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3640 return; 3641 } 3642 3643 tgt_dbg(tgt, "Adding rport\n"); 3644 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 3645 spin_lock_irqsave(vhost->host->host_lock, flags); 3646 tgt->rport = rport; 3647 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3648 if (rport) { 3649 tgt_dbg(tgt, "rport add succeeded\n"); 3650 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; 3651 rport->supported_classes = 0; 3652 tgt->target_id = rport->scsi_target_id; 3653 if (tgt->service_parms.class1_parms[0] & 0x80000000) 3654 rport->supported_classes |= FC_COS_CLASS1; 3655 if (tgt->service_parms.class2_parms[0] & 0x80000000) 3656 rport->supported_classes |= FC_COS_CLASS2; 3657 if (tgt->service_parms.class3_parms[0] & 0x80000000) 3658 rport->supported_classes |= FC_COS_CLASS3; 3659 } else 3660 tgt_dbg(tgt, "rport add failed\n"); 3661 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3662} 3663 3664/** 3665 * ibmvfc_do_work - Do task level work 3666 * @vhost: ibmvfc host struct 3667 * 3668 **/ 3669static void ibmvfc_do_work(struct ibmvfc_host *vhost) 3670{ 3671 struct ibmvfc_target *tgt; 3672 unsigned long flags; 3673 struct fc_rport *rport; 3674 3675 ibmvfc_log_ae(vhost, vhost->events_to_log); 3676 spin_lock_irqsave(vhost->host->host_lock, flags); 3677 vhost->events_to_log = 0; 3678 switch (vhost->action) { 3679 case IBMVFC_HOST_ACTION_NONE: 3680 case IBMVFC_HOST_ACTION_INIT_WAIT: 3681 break; 3682 case IBMVFC_HOST_ACTION_INIT: 3683 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 3684 if (vhost->delay_init) { 3685 vhost->delay_init = 0; 3686 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3687 ssleep(15); 3688 return; 3689 } else 3690 vhost->job_step(vhost); 3691 break; 3692 case IBMVFC_HOST_ACTION_QUERY: 3693 list_for_each_entry(tgt, &vhost->targets, queue) 3694 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 3695 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 3696 break; 3697 case IBMVFC_HOST_ACTION_QUERY_TGTS: 3698 list_for_each_entry(tgt, &vhost->targets, queue) { 3699 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 3700 tgt->job_step(tgt); 3701 break; 3702 } 3703 } 3704 3705 if (!ibmvfc_dev_init_to_do(vhost)) 3706 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 3707 break; 3708 case IBMVFC_HOST_ACTION_TGT_DEL: 3709 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 3710 list_for_each_entry(tgt, &vhost->targets, queue) { 3711 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 3712 tgt_dbg(tgt, "Deleting rport\n"); 3713 rport = tgt->rport; 3714 tgt->rport = NULL; 3715 list_del(&tgt->queue); 3716 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3717 if (rport) 3718 fc_remote_port_delete(rport); 3719 kref_put(&tgt->kref, ibmvfc_release_tgt); 3720 return; 3721 } 3722 } 3723 3724 if (vhost->state == IBMVFC_INITIALIZING) { 3725 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 3726 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 3727 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD); 3728 vhost->init_retries = 0; 3729 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3730 scsi_unblock_requests(vhost->host); 3731 return; 3732 } else { 3733 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 3734 vhost->job_step = ibmvfc_discover_targets; 3735 } 3736 } else { 3737 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3738 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3739 scsi_unblock_requests(vhost->host); 3740 wake_up(&vhost->init_wait_q); 3741 return; 3742 } 3743 break; 3744 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 3745 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 3746 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3747 ibmvfc_alloc_targets(vhost); 3748 spin_lock_irqsave(vhost->host->host_lock, flags); 3749 break; 3750 case IBMVFC_HOST_ACTION_TGT_INIT: 3751 list_for_each_entry(tgt, &vhost->targets, queue) { 3752 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 3753 tgt->job_step(tgt); 3754 break; 3755 } 3756 } 3757 3758 if (!ibmvfc_dev_init_to_do(vhost)) 3759 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 3760 break; 3761 case IBMVFC_HOST_ACTION_TGT_ADD: 3762 list_for_each_entry(tgt, &vhost->targets, queue) { 3763 if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) { 3764 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3765 ibmvfc_tgt_add_rport(tgt); 3766 return; 3767 } 3768 } 3769 3770 if (vhost->reinit && !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 3771 vhost->reinit = 0; 3772 scsi_block_requests(vhost->host); 3773 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 3774 } else { 3775 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3776 wake_up(&vhost->init_wait_q); 3777 } 3778 break; 3779 default: 3780 break; 3781 }; 3782 3783 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3784} 3785 3786/** 3787 * ibmvfc_work - Do task level work 3788 * @data: ibmvfc host struct 3789 * 3790 * Returns: 3791 * zero 3792 **/ 3793static int ibmvfc_work(void *data) 3794{ 3795 struct ibmvfc_host *vhost = data; 3796 int rc; 3797 3798 set_user_nice(current, -20); 3799 3800 while (1) { 3801 rc = wait_event_interruptible(vhost->work_wait_q, 3802 ibmvfc_work_to_do(vhost)); 3803 3804 BUG_ON(rc); 3805 3806 if (kthread_should_stop()) 3807 break; 3808 3809 ibmvfc_do_work(vhost); 3810 } 3811 3812 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 3813 return 0; 3814} 3815 3816/** 3817 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 3818 * @vhost: ibmvfc host struct 3819 * 3820 * Allocates a page for messages, maps it for dma, and registers 3821 * the crq with the hypervisor. 3822 * 3823 * Return value: 3824 * zero on success / other on failure 3825 **/ 3826static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 3827{ 3828 int rc, retrc = -ENOMEM; 3829 struct device *dev = vhost->dev; 3830 struct vio_dev *vdev = to_vio_dev(dev); 3831 struct ibmvfc_crq_queue *crq = &vhost->crq; 3832 3833 ENTER; 3834 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 3835 3836 if (!crq->msgs) 3837 return -ENOMEM; 3838 3839 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 3840 crq->msg_token = dma_map_single(dev, crq->msgs, 3841 PAGE_SIZE, DMA_BIDIRECTIONAL); 3842 3843 if (dma_mapping_error(dev, crq->msg_token)) 3844 goto map_failed; 3845 3846 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3847 crq->msg_token, PAGE_SIZE); 3848 3849 if (rc == H_RESOURCE) 3850 /* maybe kexecing and resource is busy. try a reset */ 3851 retrc = rc = ibmvfc_reset_crq(vhost); 3852 3853 if (rc == H_CLOSED) 3854 dev_warn(dev, "Partner adapter not ready\n"); 3855 else if (rc) { 3856 dev_warn(dev, "Error %d opening adapter\n", rc); 3857 goto reg_crq_failed; 3858 } 3859 3860 retrc = 0; 3861 3862 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 3863 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 3864 goto req_irq_failed; 3865 } 3866 3867 if ((rc = vio_enable_interrupts(vdev))) { 3868 dev_err(dev, "Error %d enabling interrupts\n", rc); 3869 goto req_irq_failed; 3870 } 3871 3872 crq->cur = 0; 3873 LEAVE; 3874 return retrc; 3875 3876req_irq_failed: 3877 do { 3878 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3879 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3880reg_crq_failed: 3881 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 3882map_failed: 3883 free_page((unsigned long)crq->msgs); 3884 return retrc; 3885} 3886 3887/** 3888 * ibmvfc_free_mem - Free memory for vhost 3889 * @vhost: ibmvfc host struct 3890 * 3891 * Return value: 3892 * none 3893 **/ 3894static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 3895{ 3896 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 3897 3898 ENTER; 3899 mempool_destroy(vhost->tgt_pool); 3900 kfree(vhost->trace); 3901 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 3902 vhost->disc_buf_dma); 3903 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 3904 vhost->login_buf, vhost->login_buf_dma); 3905 dma_pool_destroy(vhost->sg_pool); 3906 dma_unmap_single(vhost->dev, async_q->msg_token, 3907 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 3908 free_page((unsigned long)async_q->msgs); 3909 LEAVE; 3910} 3911 3912/** 3913 * ibmvfc_alloc_mem - Allocate memory for vhost 3914 * @vhost: ibmvfc host struct 3915 * 3916 * Return value: 3917 * 0 on success / non-zero on failure 3918 **/ 3919static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 3920{ 3921 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 3922 struct device *dev = vhost->dev; 3923 3924 ENTER; 3925 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 3926 if (!async_q->msgs) { 3927 dev_err(dev, "Couldn't allocate async queue.\n"); 3928 goto nomem; 3929 } 3930 3931 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 3932 async_q->msg_token = dma_map_single(dev, async_q->msgs, 3933 async_q->size * sizeof(*async_q->msgs), 3934 DMA_BIDIRECTIONAL); 3935 3936 if (dma_mapping_error(dev, async_q->msg_token)) { 3937 dev_err(dev, "Failed to map async queue\n"); 3938 goto free_async_crq; 3939 } 3940 3941 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 3942 SG_ALL * sizeof(struct srp_direct_buf), 3943 sizeof(struct srp_direct_buf), 0); 3944 3945 if (!vhost->sg_pool) { 3946 dev_err(dev, "Failed to allocate sg pool\n"); 3947 goto unmap_async_crq; 3948 } 3949 3950 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 3951 &vhost->login_buf_dma, GFP_KERNEL); 3952 3953 if (!vhost->login_buf) { 3954 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 3955 goto free_sg_pool; 3956 } 3957 3958 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 3959 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 3960 &vhost->disc_buf_dma, GFP_KERNEL); 3961 3962 if (!vhost->disc_buf) { 3963 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 3964 goto free_login_buffer; 3965 } 3966 3967 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 3968 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 3969 3970 if (!vhost->trace) 3971 goto free_disc_buffer; 3972 3973 vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 3974 sizeof(struct ibmvfc_target)); 3975 3976 if (!vhost->tgt_pool) { 3977 dev_err(dev, "Couldn't allocate target memory pool\n"); 3978 goto free_trace; 3979 } 3980 3981 LEAVE; 3982 return 0; 3983 3984free_trace: 3985 kfree(vhost->trace); 3986free_disc_buffer: 3987 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 3988 vhost->disc_buf_dma); 3989free_login_buffer: 3990 dma_free_coherent(dev, sizeof(*vhost->login_buf), 3991 vhost->login_buf, vhost->login_buf_dma); 3992free_sg_pool: 3993 dma_pool_destroy(vhost->sg_pool); 3994unmap_async_crq: 3995 dma_unmap_single(dev, async_q->msg_token, 3996 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 3997free_async_crq: 3998 free_page((unsigned long)async_q->msgs); 3999nomem: 4000 LEAVE; 4001 return -ENOMEM; 4002} 4003 4004/** 4005 * ibmvfc_probe - Adapter hot plug add entry point 4006 * @vdev: vio device struct 4007 * @id: vio device id struct 4008 * 4009 * Return value: 4010 * 0 on success / non-zero on failure 4011 **/ 4012static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4013{ 4014 struct ibmvfc_host *vhost; 4015 struct Scsi_Host *shost; 4016 struct device *dev = &vdev->dev; 4017 int rc = -ENOMEM; 4018 4019 ENTER; 4020 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4021 if (!shost) { 4022 dev_err(dev, "Couldn't allocate host data\n"); 4023 goto out; 4024 } 4025 4026 shost->transportt = ibmvfc_transport_template; 4027 shost->can_queue = max_requests; 4028 shost->max_lun = max_lun; 4029 shost->max_id = max_targets; 4030 shost->max_sectors = IBMVFC_MAX_SECTORS; 4031 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4032 shost->unique_id = shost->host_no; 4033 4034 vhost = shost_priv(shost); 4035 INIT_LIST_HEAD(&vhost->sent); 4036 INIT_LIST_HEAD(&vhost->free); 4037 INIT_LIST_HEAD(&vhost->targets); 4038 sprintf(vhost->name, IBMVFC_NAME); 4039 vhost->host = shost; 4040 vhost->dev = dev; 4041 vhost->partition_number = -1; 4042 vhost->log_level = log_level; 4043 strcpy(vhost->partition_name, "UNKNOWN"); 4044 init_waitqueue_head(&vhost->work_wait_q); 4045 init_waitqueue_head(&vhost->init_wait_q); 4046 4047 if ((rc = ibmvfc_alloc_mem(vhost))) 4048 goto free_scsi_host; 4049 4050 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4051 shost->host_no); 4052 4053 if (IS_ERR(vhost->work_thread)) { 4054 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4055 PTR_ERR(vhost->work_thread)); 4056 goto free_host_mem; 4057 } 4058 4059 if ((rc = ibmvfc_init_crq(vhost))) { 4060 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4061 goto kill_kthread; 4062 } 4063 4064 if ((rc = ibmvfc_init_event_pool(vhost))) { 4065 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4066 goto release_crq; 4067 } 4068 4069 if ((rc = scsi_add_host(shost, dev))) 4070 goto release_event_pool; 4071 4072 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4073 &ibmvfc_trace_attr))) { 4074 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4075 goto remove_shost; 4076 } 4077 4078 dev_set_drvdata(dev, vhost); 4079 spin_lock(&ibmvfc_driver_lock); 4080 list_add_tail(&vhost->queue, &ibmvfc_head); 4081 spin_unlock(&ibmvfc_driver_lock); 4082 4083 ibmvfc_send_crq_init(vhost); 4084 scsi_scan_host(shost); 4085 return 0; 4086 4087remove_shost: 4088 scsi_remove_host(shost); 4089release_event_pool: 4090 ibmvfc_free_event_pool(vhost); 4091release_crq: 4092 ibmvfc_release_crq_queue(vhost); 4093kill_kthread: 4094 kthread_stop(vhost->work_thread); 4095free_host_mem: 4096 ibmvfc_free_mem(vhost); 4097free_scsi_host: 4098 scsi_host_put(shost); 4099out: 4100 LEAVE; 4101 return rc; 4102} 4103 4104/** 4105 * ibmvfc_remove - Adapter hot plug remove entry point 4106 * @vdev: vio device struct 4107 * 4108 * Return value: 4109 * 0 4110 **/ 4111static int ibmvfc_remove(struct vio_dev *vdev) 4112{ 4113 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4114 unsigned long flags; 4115 4116 ENTER; 4117 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4118 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4119 ibmvfc_wait_while_resetting(vhost); 4120 ibmvfc_release_crq_queue(vhost); 4121 kthread_stop(vhost->work_thread); 4122 fc_remove_host(vhost->host); 4123 scsi_remove_host(vhost->host); 4124 4125 spin_lock_irqsave(vhost->host->host_lock, flags); 4126 ibmvfc_purge_requests(vhost, DID_ERROR); 4127 ibmvfc_free_event_pool(vhost); 4128 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4129 4130 ibmvfc_free_mem(vhost); 4131 spin_lock(&ibmvfc_driver_lock); 4132 list_del(&vhost->queue); 4133 spin_unlock(&ibmvfc_driver_lock); 4134 scsi_host_put(vhost->host); 4135 LEAVE; 4136 return 0; 4137} 4138 4139/** 4140 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4141 * @vdev: vio device struct 4142 * 4143 * Return value: 4144 * Number of bytes the driver will need to DMA map at the same time in 4145 * order to perform well. 4146 */ 4147static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4148{ 4149 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4150 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4151} 4152 4153static struct vio_device_id ibmvfc_device_table[] __devinitdata = { 4154 {"fcp", "IBM,vfc-client"}, 4155 { "", "" } 4156}; 4157MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4158 4159static struct vio_driver ibmvfc_driver = { 4160 .id_table = ibmvfc_device_table, 4161 .probe = ibmvfc_probe, 4162 .remove = ibmvfc_remove, 4163 .get_desired_dma = ibmvfc_get_desired_dma, 4164 .driver = { 4165 .name = IBMVFC_NAME, 4166 .owner = THIS_MODULE, 4167 } 4168}; 4169 4170static struct fc_function_template ibmvfc_transport_functions = { 4171 .show_host_fabric_name = 1, 4172 .show_host_node_name = 1, 4173 .show_host_port_name = 1, 4174 .show_host_supported_classes = 1, 4175 .show_host_port_type = 1, 4176 .show_host_port_id = 1, 4177 4178 .get_host_port_state = ibmvfc_get_host_port_state, 4179 .show_host_port_state = 1, 4180 4181 .get_host_speed = ibmvfc_get_host_speed, 4182 .show_host_speed = 1, 4183 4184 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4185 .terminate_rport_io = ibmvfc_terminate_rport_io, 4186 4187 .show_rport_maxframe_size = 1, 4188 .show_rport_supported_classes = 1, 4189 4190 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4191 .show_rport_dev_loss_tmo = 1, 4192 4193 .get_starget_node_name = ibmvfc_get_starget_node_name, 4194 .show_starget_node_name = 1, 4195 4196 .get_starget_port_name = ibmvfc_get_starget_port_name, 4197 .show_starget_port_name = 1, 4198 4199 .get_starget_port_id = ibmvfc_get_starget_port_id, 4200 .show_starget_port_id = 1, 4201}; 4202 4203/** 4204 * ibmvfc_module_init - Initialize the ibmvfc module 4205 * 4206 * Return value: 4207 * 0 on success / other on failure 4208 **/ 4209static int __init ibmvfc_module_init(void) 4210{ 4211 int rc; 4212 4213 if (!firmware_has_feature(FW_FEATURE_VIO)) 4214 return -ENODEV; 4215 4216 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4217 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4218 4219 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4220 if (!ibmvfc_transport_template) 4221 return -ENOMEM; 4222 4223 rc = vio_register_driver(&ibmvfc_driver); 4224 if (rc) 4225 fc_release_transport(ibmvfc_transport_template); 4226 return rc; 4227} 4228 4229/** 4230 * ibmvfc_module_exit - Teardown the ibmvfc module 4231 * 4232 * Return value: 4233 * nothing 4234 **/ 4235static void __exit ibmvfc_module_exit(void) 4236{ 4237 vio_unregister_driver(&ibmvfc_driver); 4238 fc_release_transport(ibmvfc_transport_template); 4239} 4240 4241module_init(ibmvfc_module_init); 4242module_exit(ibmvfc_module_exit); 4243