ibmvfc.c revision 017b2ae33c0fc7d70320cc7f1cce0efb6ce8d929
1/* 2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 3 * 4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 5 * 6 * Copyright (C) IBM Corporation, 2008 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24#include <linux/module.h> 25#include <linux/moduleparam.h> 26#include <linux/dma-mapping.h> 27#include <linux/dmapool.h> 28#include <linux/delay.h> 29#include <linux/interrupt.h> 30#include <linux/kthread.h> 31#include <linux/of.h> 32#include <linux/stringify.h> 33#include <asm/firmware.h> 34#include <asm/irq.h> 35#include <asm/vio.h> 36#include <scsi/scsi.h> 37#include <scsi/scsi_cmnd.h> 38#include <scsi/scsi_host.h> 39#include <scsi/scsi_device.h> 40#include <scsi/scsi_tcq.h> 41#include <scsi/scsi_transport_fc.h> 42#include "ibmvfc.h" 43 44static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 45static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 46static unsigned int max_lun = IBMVFC_MAX_LUN; 47static unsigned int max_targets = IBMVFC_MAX_TARGETS; 48static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 49static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 50static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO; 51static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 52static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 53static LIST_HEAD(ibmvfc_head); 54static DEFINE_SPINLOCK(ibmvfc_driver_lock); 55static struct scsi_transport_template *ibmvfc_transport_template; 56 57MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 58MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 59MODULE_LICENSE("GPL"); 60MODULE_VERSION(IBMVFC_DRIVER_VERSION); 61 62module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 63MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 64 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 65module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 66MODULE_PARM_DESC(default_timeout, 67 "Default timeout in seconds for initialization and EH commands. " 68 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 69module_param_named(max_requests, max_requests, uint, S_IRUGO); 70MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 71 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 72module_param_named(max_lun, max_lun, uint, S_IRUGO); 73MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 74 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 75module_param_named(max_targets, max_targets, uint, S_IRUGO); 76MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 77 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 78module_param_named(disc_threads, disc_threads, uint, S_IRUGO); 79MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 80 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 81module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 82MODULE_PARM_DESC(debug, "Enable driver debug information. " 83 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 84module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR); 85MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC " 86 "transport should insulate the loss of a remote port. Once this " 87 "value is exceeded, the scsi target is removed. " 88 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]"); 89module_param_named(log_level, log_level, uint, 0); 90MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 91 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 92 93static const struct { 94 u16 status; 95 u16 error; 96 u8 result; 97 u8 retry; 98 int log; 99 char *name; 100} cmd_status [] = { 101 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 102 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 103 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 104 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 105 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 106 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 107 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 108 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 109 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 110 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 111 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 112 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 115 116 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 117 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 118 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 119 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 120 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 121 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 122 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 123 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 124 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 125 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 126 127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 128 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 129 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 131 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 132 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 133 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 134 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 135 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 136 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 137 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 138 139 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 140}; 141 142static void ibmvfc_npiv_login(struct ibmvfc_host *); 143static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 144static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 145static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 146static void ibmvfc_npiv_logout(struct ibmvfc_host *); 147 148static const char *unknown_error = "unknown error"; 149 150#ifdef CONFIG_SCSI_IBMVFC_TRACE 151/** 152 * ibmvfc_trc_start - Log a start trace entry 153 * @evt: ibmvfc event struct 154 * 155 **/ 156static void ibmvfc_trc_start(struct ibmvfc_event *evt) 157{ 158 struct ibmvfc_host *vhost = evt->vhost; 159 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 160 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 161 struct ibmvfc_trace_entry *entry; 162 163 entry = &vhost->trace[vhost->trace_index++]; 164 entry->evt = evt; 165 entry->time = jiffies; 166 entry->fmt = evt->crq.format; 167 entry->type = IBMVFC_TRC_START; 168 169 switch (entry->fmt) { 170 case IBMVFC_CMD_FORMAT: 171 entry->op_code = vfc_cmd->iu.cdb[0]; 172 entry->scsi_id = vfc_cmd->tgt_scsi_id; 173 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 174 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 175 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; 176 break; 177 case IBMVFC_MAD_FORMAT: 178 entry->op_code = mad->opcode; 179 break; 180 default: 181 break; 182 }; 183} 184 185/** 186 * ibmvfc_trc_end - Log an end trace entry 187 * @evt: ibmvfc event struct 188 * 189 **/ 190static void ibmvfc_trc_end(struct ibmvfc_event *evt) 191{ 192 struct ibmvfc_host *vhost = evt->vhost; 193 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 194 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 195 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; 196 197 entry->evt = evt; 198 entry->time = jiffies; 199 entry->fmt = evt->crq.format; 200 entry->type = IBMVFC_TRC_END; 201 202 switch (entry->fmt) { 203 case IBMVFC_CMD_FORMAT: 204 entry->op_code = vfc_cmd->iu.cdb[0]; 205 entry->scsi_id = vfc_cmd->tgt_scsi_id; 206 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 207 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 208 entry->u.end.status = vfc_cmd->status; 209 entry->u.end.error = vfc_cmd->error; 210 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; 211 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; 212 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; 213 break; 214 case IBMVFC_MAD_FORMAT: 215 entry->op_code = mad->opcode; 216 entry->u.end.status = mad->status; 217 break; 218 default: 219 break; 220 221 }; 222} 223 224#else 225#define ibmvfc_trc_start(evt) do { } while (0) 226#define ibmvfc_trc_end(evt) do { } while (0) 227#endif 228 229/** 230 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 231 * @status: status / error class 232 * @error: error 233 * 234 * Return value: 235 * index into cmd_status / -EINVAL on failure 236 **/ 237static int ibmvfc_get_err_index(u16 status, u16 error) 238{ 239 int i; 240 241 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 242 if ((cmd_status[i].status & status) == cmd_status[i].status && 243 cmd_status[i].error == error) 244 return i; 245 246 return -EINVAL; 247} 248 249/** 250 * ibmvfc_get_cmd_error - Find the error description for the fcp response 251 * @status: status / error class 252 * @error: error 253 * 254 * Return value: 255 * error description string 256 **/ 257static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 258{ 259 int rc = ibmvfc_get_err_index(status, error); 260 if (rc >= 0) 261 return cmd_status[rc].name; 262 return unknown_error; 263} 264 265/** 266 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 267 * @vfc_cmd: ibmvfc command struct 268 * 269 * Return value: 270 * SCSI result value to return for completed command 271 **/ 272static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) 273{ 274 int err; 275 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 276 int fc_rsp_len = rsp->fcp_rsp_len; 277 278 if ((rsp->flags & FCP_RSP_LEN_VALID) && 279 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 280 rsp->data.info.rsp_code)) 281 return DID_ERROR << 16; 282 283 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 284 if (err >= 0) 285 return rsp->scsi_status | (cmd_status[err].result << 16); 286 return rsp->scsi_status | (DID_ERROR << 16); 287} 288 289/** 290 * ibmvfc_retry_cmd - Determine if error status is retryable 291 * @status: status / error class 292 * @error: error 293 * 294 * Return value: 295 * 1 if error should be retried / 0 if it should not 296 **/ 297static int ibmvfc_retry_cmd(u16 status, u16 error) 298{ 299 int rc = ibmvfc_get_err_index(status, error); 300 301 if (rc >= 0) 302 return cmd_status[rc].retry; 303 return 1; 304} 305 306static const char *unknown_fc_explain = "unknown fc explain"; 307 308static const struct { 309 u16 fc_explain; 310 char *name; 311} ls_explain [] = { 312 { 0x00, "no additional explanation" }, 313 { 0x01, "service parameter error - options" }, 314 { 0x03, "service parameter error - initiator control" }, 315 { 0x05, "service parameter error - recipient control" }, 316 { 0x07, "service parameter error - received data field size" }, 317 { 0x09, "service parameter error - concurrent seq" }, 318 { 0x0B, "service parameter error - credit" }, 319 { 0x0D, "invalid N_Port/F_Port_Name" }, 320 { 0x0E, "invalid node/Fabric Name" }, 321 { 0x0F, "invalid common service parameters" }, 322 { 0x11, "invalid association header" }, 323 { 0x13, "association header required" }, 324 { 0x15, "invalid originator S_ID" }, 325 { 0x17, "invalid OX_ID-RX-ID combination" }, 326 { 0x19, "command (request) already in progress" }, 327 { 0x1E, "N_Port Login requested" }, 328 { 0x1F, "Invalid N_Port_ID" }, 329}; 330 331static const struct { 332 u16 fc_explain; 333 char *name; 334} gs_explain [] = { 335 { 0x00, "no additional explanation" }, 336 { 0x01, "port identifier not registered" }, 337 { 0x02, "port name not registered" }, 338 { 0x03, "node name not registered" }, 339 { 0x04, "class of service not registered" }, 340 { 0x06, "initial process associator not registered" }, 341 { 0x07, "FC-4 TYPEs not registered" }, 342 { 0x08, "symbolic port name not registered" }, 343 { 0x09, "symbolic node name not registered" }, 344 { 0x0A, "port type not registered" }, 345 { 0xF0, "authorization exception" }, 346 { 0xF1, "authentication exception" }, 347 { 0xF2, "data base full" }, 348 { 0xF3, "data base empty" }, 349 { 0xF4, "processing request" }, 350 { 0xF5, "unable to verify connection" }, 351 { 0xF6, "devices not in a common zone" }, 352}; 353 354/** 355 * ibmvfc_get_ls_explain - Return the FC Explain description text 356 * @status: FC Explain status 357 * 358 * Returns: 359 * error string 360 **/ 361static const char *ibmvfc_get_ls_explain(u16 status) 362{ 363 int i; 364 365 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 366 if (ls_explain[i].fc_explain == status) 367 return ls_explain[i].name; 368 369 return unknown_fc_explain; 370} 371 372/** 373 * ibmvfc_get_gs_explain - Return the FC Explain description text 374 * @status: FC Explain status 375 * 376 * Returns: 377 * error string 378 **/ 379static const char *ibmvfc_get_gs_explain(u16 status) 380{ 381 int i; 382 383 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 384 if (gs_explain[i].fc_explain == status) 385 return gs_explain[i].name; 386 387 return unknown_fc_explain; 388} 389 390static const struct { 391 enum ibmvfc_fc_type fc_type; 392 char *name; 393} fc_type [] = { 394 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 395 { IBMVFC_PORT_REJECT, "port reject" }, 396 { IBMVFC_LS_REJECT, "ELS reject" }, 397 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 398 { IBMVFC_PORT_BUSY, "port busy" }, 399 { IBMVFC_BASIC_REJECT, "basic reject" }, 400}; 401 402static const char *unknown_fc_type = "unknown fc type"; 403 404/** 405 * ibmvfc_get_fc_type - Return the FC Type description text 406 * @status: FC Type error status 407 * 408 * Returns: 409 * error string 410 **/ 411static const char *ibmvfc_get_fc_type(u16 status) 412{ 413 int i; 414 415 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 416 if (fc_type[i].fc_type == status) 417 return fc_type[i].name; 418 419 return unknown_fc_type; 420} 421 422/** 423 * ibmvfc_set_tgt_action - Set the next init action for the target 424 * @tgt: ibmvfc target struct 425 * @action: action to perform 426 * 427 **/ 428static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 429 enum ibmvfc_target_action action) 430{ 431 switch (tgt->action) { 432 case IBMVFC_TGT_ACTION_DEL_RPORT: 433 break; 434 default: 435 if (action == IBMVFC_TGT_ACTION_DEL_RPORT) 436 tgt->add_rport = 0; 437 tgt->action = action; 438 break; 439 } 440} 441 442/** 443 * ibmvfc_set_host_state - Set the state for the host 444 * @vhost: ibmvfc host struct 445 * @state: state to set host to 446 * 447 * Returns: 448 * 0 if state changed / non-zero if not changed 449 **/ 450static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 451 enum ibmvfc_host_state state) 452{ 453 int rc = 0; 454 455 switch (vhost->state) { 456 case IBMVFC_HOST_OFFLINE: 457 rc = -EINVAL; 458 break; 459 default: 460 vhost->state = state; 461 break; 462 }; 463 464 return rc; 465} 466 467/** 468 * ibmvfc_set_host_action - Set the next init action for the host 469 * @vhost: ibmvfc host struct 470 * @action: action to perform 471 * 472 **/ 473static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 474 enum ibmvfc_host_action action) 475{ 476 switch (action) { 477 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 478 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 479 vhost->action = action; 480 break; 481 case IBMVFC_HOST_ACTION_LOGO_WAIT: 482 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 483 vhost->action = action; 484 break; 485 case IBMVFC_HOST_ACTION_INIT_WAIT: 486 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 487 vhost->action = action; 488 break; 489 case IBMVFC_HOST_ACTION_QUERY: 490 switch (vhost->action) { 491 case IBMVFC_HOST_ACTION_INIT_WAIT: 492 case IBMVFC_HOST_ACTION_NONE: 493 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 494 vhost->action = action; 495 break; 496 default: 497 break; 498 }; 499 break; 500 case IBMVFC_HOST_ACTION_TGT_INIT: 501 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 502 vhost->action = action; 503 break; 504 case IBMVFC_HOST_ACTION_LOGO: 505 case IBMVFC_HOST_ACTION_INIT: 506 case IBMVFC_HOST_ACTION_TGT_DEL: 507 case IBMVFC_HOST_ACTION_QUERY_TGTS: 508 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 509 case IBMVFC_HOST_ACTION_NONE: 510 default: 511 vhost->action = action; 512 break; 513 }; 514} 515 516/** 517 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 518 * @vhost: ibmvfc host struct 519 * 520 * Return value: 521 * nothing 522 **/ 523static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 524{ 525 if (vhost->action == IBMVFC_HOST_ACTION_NONE) { 526 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 527 scsi_block_requests(vhost->host); 528 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 529 } 530 } else 531 vhost->reinit = 1; 532 533 wake_up(&vhost->work_wait_q); 534} 535 536/** 537 * ibmvfc_link_down - Handle a link down event from the adapter 538 * @vhost: ibmvfc host struct 539 * @state: ibmvfc host state to enter 540 * 541 **/ 542static void ibmvfc_link_down(struct ibmvfc_host *vhost, 543 enum ibmvfc_host_state state) 544{ 545 struct ibmvfc_target *tgt; 546 547 ENTER; 548 scsi_block_requests(vhost->host); 549 list_for_each_entry(tgt, &vhost->targets, queue) 550 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 551 ibmvfc_set_host_state(vhost, state); 552 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 553 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 554 wake_up(&vhost->work_wait_q); 555 LEAVE; 556} 557 558/** 559 * ibmvfc_init_host - Start host initialization 560 * @vhost: ibmvfc host struct 561 * @relogin: is this a re-login? 562 * 563 * Return value: 564 * nothing 565 **/ 566static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin) 567{ 568 struct ibmvfc_target *tgt; 569 570 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 571 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 572 dev_err(vhost->dev, 573 "Host initialization retries exceeded. Taking adapter offline\n"); 574 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 575 return; 576 } 577 } 578 579 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 580 if (!relogin) { 581 memset(vhost->async_crq.msgs, 0, PAGE_SIZE); 582 vhost->async_crq.cur = 0; 583 } 584 585 list_for_each_entry(tgt, &vhost->targets, queue) 586 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 587 scsi_block_requests(vhost->host); 588 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 589 vhost->job_step = ibmvfc_npiv_login; 590 wake_up(&vhost->work_wait_q); 591 } 592} 593 594/** 595 * ibmvfc_send_crq - Send a CRQ 596 * @vhost: ibmvfc host struct 597 * @word1: the first 64 bits of the data 598 * @word2: the second 64 bits of the data 599 * 600 * Return value: 601 * 0 on success / other on failure 602 **/ 603static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 604{ 605 struct vio_dev *vdev = to_vio_dev(vhost->dev); 606 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 607} 608 609/** 610 * ibmvfc_send_crq_init - Send a CRQ init message 611 * @vhost: ibmvfc host struct 612 * 613 * Return value: 614 * 0 on success / other on failure 615 **/ 616static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 617{ 618 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 619 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 620} 621 622/** 623 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 624 * @vhost: ibmvfc host struct 625 * 626 * Return value: 627 * 0 on success / other on failure 628 **/ 629static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 630{ 631 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 632 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 633} 634 635/** 636 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 637 * @vhost: ibmvfc host struct 638 * 639 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 640 * the crq with the hypervisor. 641 **/ 642static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 643{ 644 long rc; 645 struct vio_dev *vdev = to_vio_dev(vhost->dev); 646 struct ibmvfc_crq_queue *crq = &vhost->crq; 647 648 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 649 free_irq(vdev->irq, vhost); 650 tasklet_kill(&vhost->tasklet); 651 do { 652 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 653 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 654 655 vhost->state = IBMVFC_NO_CRQ; 656 vhost->logged_in = 0; 657 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 658 free_page((unsigned long)crq->msgs); 659} 660 661/** 662 * ibmvfc_reenable_crq_queue - reenables the CRQ 663 * @vhost: ibmvfc host struct 664 * 665 * Return value: 666 * 0 on success / other on failure 667 **/ 668static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 669{ 670 int rc; 671 struct vio_dev *vdev = to_vio_dev(vhost->dev); 672 673 /* Re-enable the CRQ */ 674 do { 675 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 676 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 677 678 if (rc) 679 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 680 681 return rc; 682} 683 684/** 685 * ibmvfc_reset_crq - resets a crq after a failure 686 * @vhost: ibmvfc host struct 687 * 688 * Return value: 689 * 0 on success / other on failure 690 **/ 691static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 692{ 693 int rc; 694 struct vio_dev *vdev = to_vio_dev(vhost->dev); 695 struct ibmvfc_crq_queue *crq = &vhost->crq; 696 697 /* Close the CRQ */ 698 do { 699 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 700 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 701 702 vhost->state = IBMVFC_NO_CRQ; 703 vhost->logged_in = 0; 704 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 705 706 /* Clean out the queue */ 707 memset(crq->msgs, 0, PAGE_SIZE); 708 crq->cur = 0; 709 710 /* And re-open it again */ 711 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 712 crq->msg_token, PAGE_SIZE); 713 714 if (rc == H_CLOSED) 715 /* Adapter is good, but other end is not ready */ 716 dev_warn(vhost->dev, "Partner adapter not ready\n"); 717 else if (rc != 0) 718 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 719 720 return rc; 721} 722 723/** 724 * ibmvfc_valid_event - Determines if event is valid. 725 * @pool: event_pool that contains the event 726 * @evt: ibmvfc event to be checked for validity 727 * 728 * Return value: 729 * 1 if event is valid / 0 if event is not valid 730 **/ 731static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 732 struct ibmvfc_event *evt) 733{ 734 int index = evt - pool->events; 735 if (index < 0 || index >= pool->size) /* outside of bounds */ 736 return 0; 737 if (evt != pool->events + index) /* unaligned */ 738 return 0; 739 return 1; 740} 741 742/** 743 * ibmvfc_free_event - Free the specified event 744 * @evt: ibmvfc_event to be freed 745 * 746 **/ 747static void ibmvfc_free_event(struct ibmvfc_event *evt) 748{ 749 struct ibmvfc_host *vhost = evt->vhost; 750 struct ibmvfc_event_pool *pool = &vhost->pool; 751 752 BUG_ON(!ibmvfc_valid_event(pool, evt)); 753 BUG_ON(atomic_inc_return(&evt->free) != 1); 754 list_add_tail(&evt->queue, &vhost->free); 755} 756 757/** 758 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 759 * @evt: ibmvfc event struct 760 * 761 * This function does not setup any error status, that must be done 762 * before this function gets called. 763 **/ 764static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 765{ 766 struct scsi_cmnd *cmnd = evt->cmnd; 767 768 if (cmnd) { 769 scsi_dma_unmap(cmnd); 770 cmnd->scsi_done(cmnd); 771 } 772 773 if (evt->eh_comp) 774 complete(evt->eh_comp); 775 776 ibmvfc_free_event(evt); 777} 778 779/** 780 * ibmvfc_fail_request - Fail request with specified error code 781 * @evt: ibmvfc event struct 782 * @error_code: error code to fail request with 783 * 784 * Return value: 785 * none 786 **/ 787static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 788{ 789 if (evt->cmnd) { 790 evt->cmnd->result = (error_code << 16); 791 evt->done = ibmvfc_scsi_eh_done; 792 } else 793 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; 794 795 list_del(&evt->queue); 796 del_timer(&evt->timer); 797 ibmvfc_trc_end(evt); 798 evt->done(evt); 799} 800 801/** 802 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 803 * @vhost: ibmvfc host struct 804 * @error_code: error code to fail requests with 805 * 806 * Return value: 807 * none 808 **/ 809static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 810{ 811 struct ibmvfc_event *evt, *pos; 812 813 ibmvfc_dbg(vhost, "Purging all requests\n"); 814 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 815 ibmvfc_fail_request(evt, error_code); 816} 817 818/** 819 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 820 * @vhost: struct ibmvfc host to reset 821 **/ 822static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 823{ 824 int rc; 825 826 scsi_block_requests(vhost->host); 827 ibmvfc_purge_requests(vhost, DID_ERROR); 828 if ((rc = ibmvfc_reset_crq(vhost)) || 829 (rc = ibmvfc_send_crq_init(vhost)) || 830 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 831 dev_err(vhost->dev, "Error after reset rc=%d\n", rc); 832 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 833 } else 834 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 835} 836 837/** 838 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 839 * @vhost: struct ibmvfc host to reset 840 **/ 841static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 842{ 843 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 844 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 845 scsi_block_requests(vhost->host); 846 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 847 vhost->job_step = ibmvfc_npiv_logout; 848 wake_up(&vhost->work_wait_q); 849 } else 850 ibmvfc_hard_reset_host(vhost); 851} 852 853/** 854 * ibmvfc_reset_host - Reset the connection to the server 855 * @vhost: ibmvfc host struct 856 **/ 857static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 858{ 859 unsigned long flags; 860 861 spin_lock_irqsave(vhost->host->host_lock, flags); 862 __ibmvfc_reset_host(vhost); 863 spin_unlock_irqrestore(vhost->host->host_lock, flags); 864} 865 866/** 867 * ibmvfc_retry_host_init - Retry host initialization if allowed 868 * @vhost: ibmvfc host struct 869 * 870 * Returns: 1 if init will be retried / 0 if not 871 * 872 **/ 873static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 874{ 875 int retry = 0; 876 877 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 878 vhost->delay_init = 1; 879 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 880 dev_err(vhost->dev, 881 "Host initialization retries exceeded. Taking adapter offline\n"); 882 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 883 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 884 __ibmvfc_reset_host(vhost); 885 else { 886 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 887 retry = 1; 888 } 889 } 890 891 wake_up(&vhost->work_wait_q); 892 return retry; 893} 894 895/** 896 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 897 * @starget: scsi target struct 898 * 899 * Return value: 900 * ibmvfc_target struct / NULL if not found 901 **/ 902static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 903{ 904 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 905 struct ibmvfc_host *vhost = shost_priv(shost); 906 struct ibmvfc_target *tgt; 907 908 list_for_each_entry(tgt, &vhost->targets, queue) 909 if (tgt->target_id == starget->id) { 910 kref_get(&tgt->kref); 911 return tgt; 912 } 913 return NULL; 914} 915 916/** 917 * ibmvfc_get_target - Find the specified scsi_target 918 * @starget: scsi target struct 919 * 920 * Return value: 921 * ibmvfc_target struct / NULL if not found 922 **/ 923static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 924{ 925 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 926 struct ibmvfc_target *tgt; 927 unsigned long flags; 928 929 spin_lock_irqsave(shost->host_lock, flags); 930 tgt = __ibmvfc_get_target(starget); 931 spin_unlock_irqrestore(shost->host_lock, flags); 932 return tgt; 933} 934 935/** 936 * ibmvfc_get_host_speed - Get host port speed 937 * @shost: scsi host struct 938 * 939 * Return value: 940 * none 941 **/ 942static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 943{ 944 struct ibmvfc_host *vhost = shost_priv(shost); 945 unsigned long flags; 946 947 spin_lock_irqsave(shost->host_lock, flags); 948 if (vhost->state == IBMVFC_ACTIVE) { 949 switch (vhost->login_buf->resp.link_speed / 100) { 950 case 1: 951 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 952 break; 953 case 2: 954 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 955 break; 956 case 4: 957 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 958 break; 959 case 8: 960 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 961 break; 962 case 10: 963 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 964 break; 965 case 16: 966 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 967 break; 968 default: 969 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 970 vhost->login_buf->resp.link_speed / 100); 971 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 972 break; 973 } 974 } else 975 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 976 spin_unlock_irqrestore(shost->host_lock, flags); 977} 978 979/** 980 * ibmvfc_get_host_port_state - Get host port state 981 * @shost: scsi host struct 982 * 983 * Return value: 984 * none 985 **/ 986static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 987{ 988 struct ibmvfc_host *vhost = shost_priv(shost); 989 unsigned long flags; 990 991 spin_lock_irqsave(shost->host_lock, flags); 992 switch (vhost->state) { 993 case IBMVFC_INITIALIZING: 994 case IBMVFC_ACTIVE: 995 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 996 break; 997 case IBMVFC_LINK_DOWN: 998 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 999 break; 1000 case IBMVFC_LINK_DEAD: 1001 case IBMVFC_HOST_OFFLINE: 1002 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1003 break; 1004 case IBMVFC_HALTED: 1005 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1006 break; 1007 case IBMVFC_NO_CRQ: 1008 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1009 break; 1010 default: 1011 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1012 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1013 break; 1014 } 1015 spin_unlock_irqrestore(shost->host_lock, flags); 1016} 1017 1018/** 1019 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1020 * @rport: rport struct 1021 * @timeout: timeout value 1022 * 1023 * Return value: 1024 * none 1025 **/ 1026static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1027{ 1028 if (timeout) 1029 rport->dev_loss_tmo = timeout; 1030 else 1031 rport->dev_loss_tmo = 1; 1032} 1033 1034/** 1035 * ibmvfc_release_tgt - Free memory allocated for a target 1036 * @kref: kref struct 1037 * 1038 **/ 1039static void ibmvfc_release_tgt(struct kref *kref) 1040{ 1041 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1042 kfree(tgt); 1043} 1044 1045/** 1046 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1047 * @starget: scsi target struct 1048 * 1049 * Return value: 1050 * none 1051 **/ 1052static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1053{ 1054 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1055 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1056 if (tgt) 1057 kref_put(&tgt->kref, ibmvfc_release_tgt); 1058} 1059 1060/** 1061 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1062 * @starget: scsi target struct 1063 * 1064 * Return value: 1065 * none 1066 **/ 1067static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1068{ 1069 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1070 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1071 if (tgt) 1072 kref_put(&tgt->kref, ibmvfc_release_tgt); 1073} 1074 1075/** 1076 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1077 * @starget: scsi target struct 1078 * 1079 * Return value: 1080 * none 1081 **/ 1082static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1083{ 1084 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1085 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1086 if (tgt) 1087 kref_put(&tgt->kref, ibmvfc_release_tgt); 1088} 1089 1090/** 1091 * ibmvfc_wait_while_resetting - Wait while the host resets 1092 * @vhost: ibmvfc host struct 1093 * 1094 * Return value: 1095 * 0 on success / other on failure 1096 **/ 1097static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1098{ 1099 long timeout = wait_event_timeout(vhost->init_wait_q, 1100 ((vhost->state == IBMVFC_ACTIVE || 1101 vhost->state == IBMVFC_HOST_OFFLINE || 1102 vhost->state == IBMVFC_LINK_DEAD) && 1103 vhost->action == IBMVFC_HOST_ACTION_NONE), 1104 (init_timeout * HZ)); 1105 1106 return timeout ? 0 : -EIO; 1107} 1108 1109/** 1110 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1111 * @shost: scsi host struct 1112 * 1113 * Return value: 1114 * 0 on success / other on failure 1115 **/ 1116static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1117{ 1118 struct ibmvfc_host *vhost = shost_priv(shost); 1119 1120 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1121 ibmvfc_reset_host(vhost); 1122 return ibmvfc_wait_while_resetting(vhost); 1123} 1124 1125/** 1126 * ibmvfc_gather_partition_info - Gather info about the LPAR 1127 * 1128 * Return value: 1129 * none 1130 **/ 1131static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1132{ 1133 struct device_node *rootdn; 1134 const char *name; 1135 const unsigned int *num; 1136 1137 rootdn = of_find_node_by_path("/"); 1138 if (!rootdn) 1139 return; 1140 1141 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1142 if (name) 1143 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1144 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1145 if (num) 1146 vhost->partition_number = *num; 1147 of_node_put(rootdn); 1148} 1149 1150/** 1151 * ibmvfc_set_login_info - Setup info for NPIV login 1152 * @vhost: ibmvfc host struct 1153 * 1154 * Return value: 1155 * none 1156 **/ 1157static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1158{ 1159 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1160 struct device_node *of_node = vhost->dev->archdata.of_node; 1161 const char *location; 1162 1163 memset(login_info, 0, sizeof(*login_info)); 1164 1165 login_info->ostype = IBMVFC_OS_LINUX; 1166 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; 1167 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); 1168 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); 1169 login_info->partition_num = vhost->partition_number; 1170 login_info->vfc_frame_version = 1; 1171 login_info->fcp_version = 3; 1172 login_info->flags = IBMVFC_FLUSH_ON_HALT; 1173 if (vhost->client_migrated) 1174 login_info->flags |= IBMVFC_CLIENT_MIGRATED; 1175 1176 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1177 login_info->capabilities = IBMVFC_CAN_MIGRATE; 1178 login_info->async.va = vhost->async_crq.msg_token; 1179 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); 1180 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1181 strncpy(login_info->device_name, 1182 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1183 1184 location = of_get_property(of_node, "ibm,loc-code", NULL); 1185 location = location ? location : dev_name(vhost->dev); 1186 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1187} 1188 1189/** 1190 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1191 * @vhost: ibmvfc host who owns the event pool 1192 * 1193 * Returns zero on success. 1194 **/ 1195static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1196{ 1197 int i; 1198 struct ibmvfc_event_pool *pool = &vhost->pool; 1199 1200 ENTER; 1201 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1202 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1203 if (!pool->events) 1204 return -ENOMEM; 1205 1206 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1207 pool->size * sizeof(*pool->iu_storage), 1208 &pool->iu_token, 0); 1209 1210 if (!pool->iu_storage) { 1211 kfree(pool->events); 1212 return -ENOMEM; 1213 } 1214 1215 for (i = 0; i < pool->size; ++i) { 1216 struct ibmvfc_event *evt = &pool->events[i]; 1217 atomic_set(&evt->free, 1); 1218 evt->crq.valid = 0x80; 1219 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); 1220 evt->xfer_iu = pool->iu_storage + i; 1221 evt->vhost = vhost; 1222 evt->ext_list = NULL; 1223 list_add_tail(&evt->queue, &vhost->free); 1224 } 1225 1226 LEAVE; 1227 return 0; 1228} 1229 1230/** 1231 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1232 * @vhost: ibmvfc host who owns the event pool 1233 * 1234 **/ 1235static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1236{ 1237 int i; 1238 struct ibmvfc_event_pool *pool = &vhost->pool; 1239 1240 ENTER; 1241 for (i = 0; i < pool->size; ++i) { 1242 list_del(&pool->events[i].queue); 1243 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1244 if (pool->events[i].ext_list) 1245 dma_pool_free(vhost->sg_pool, 1246 pool->events[i].ext_list, 1247 pool->events[i].ext_list_token); 1248 } 1249 1250 kfree(pool->events); 1251 dma_free_coherent(vhost->dev, 1252 pool->size * sizeof(*pool->iu_storage), 1253 pool->iu_storage, pool->iu_token); 1254 LEAVE; 1255} 1256 1257/** 1258 * ibmvfc_get_event - Gets the next free event in pool 1259 * @vhost: ibmvfc host struct 1260 * 1261 * Returns a free event from the pool. 1262 **/ 1263static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1264{ 1265 struct ibmvfc_event *evt; 1266 1267 BUG_ON(list_empty(&vhost->free)); 1268 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1269 atomic_set(&evt->free, 0); 1270 list_del(&evt->queue); 1271 return evt; 1272} 1273 1274/** 1275 * ibmvfc_init_event - Initialize fields in an event struct that are always 1276 * required. 1277 * @evt: The event 1278 * @done: Routine to call when the event is responded to 1279 * @format: SRP or MAD format 1280 **/ 1281static void ibmvfc_init_event(struct ibmvfc_event *evt, 1282 void (*done) (struct ibmvfc_event *), u8 format) 1283{ 1284 evt->cmnd = NULL; 1285 evt->sync_iu = NULL; 1286 evt->crq.format = format; 1287 evt->done = done; 1288 evt->eh_comp = NULL; 1289} 1290 1291/** 1292 * ibmvfc_map_sg_list - Initialize scatterlist 1293 * @scmd: scsi command struct 1294 * @nseg: number of scatterlist segments 1295 * @md: memory descriptor list to initialize 1296 **/ 1297static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1298 struct srp_direct_buf *md) 1299{ 1300 int i; 1301 struct scatterlist *sg; 1302 1303 scsi_for_each_sg(scmd, sg, nseg, i) { 1304 md[i].va = sg_dma_address(sg); 1305 md[i].len = sg_dma_len(sg); 1306 md[i].key = 0; 1307 } 1308} 1309 1310/** 1311 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1312 * @scmd: Scsi_Cmnd with the scatterlist 1313 * @evt: ibmvfc event struct 1314 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1315 * @dev: device for which to map dma memory 1316 * 1317 * Returns: 1318 * 0 on success / non-zero on failure 1319 **/ 1320static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1321 struct ibmvfc_event *evt, 1322 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1323{ 1324 1325 int sg_mapped; 1326 struct srp_direct_buf *data = &vfc_cmd->ioba; 1327 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1328 1329 sg_mapped = scsi_dma_map(scmd); 1330 if (!sg_mapped) { 1331 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; 1332 return 0; 1333 } else if (unlikely(sg_mapped < 0)) { 1334 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1335 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1336 return sg_mapped; 1337 } 1338 1339 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1340 vfc_cmd->flags |= IBMVFC_WRITE; 1341 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1342 } else { 1343 vfc_cmd->flags |= IBMVFC_READ; 1344 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1345 } 1346 1347 if (sg_mapped == 1) { 1348 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1349 return 0; 1350 } 1351 1352 vfc_cmd->flags |= IBMVFC_SCATTERLIST; 1353 1354 if (!evt->ext_list) { 1355 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1356 &evt->ext_list_token); 1357 1358 if (!evt->ext_list) { 1359 scsi_dma_unmap(scmd); 1360 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1361 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1362 return -ENOMEM; 1363 } 1364 } 1365 1366 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1367 1368 data->va = evt->ext_list_token; 1369 data->len = sg_mapped * sizeof(struct srp_direct_buf); 1370 data->key = 0; 1371 return 0; 1372} 1373 1374/** 1375 * ibmvfc_timeout - Internal command timeout handler 1376 * @evt: struct ibmvfc_event that timed out 1377 * 1378 * Called when an internally generated command times out 1379 **/ 1380static void ibmvfc_timeout(struct ibmvfc_event *evt) 1381{ 1382 struct ibmvfc_host *vhost = evt->vhost; 1383 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1384 ibmvfc_reset_host(vhost); 1385} 1386 1387/** 1388 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1389 * @evt: event to be sent 1390 * @vhost: ibmvfc host struct 1391 * @timeout: timeout in seconds - 0 means do not time command 1392 * 1393 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1394 **/ 1395static int ibmvfc_send_event(struct ibmvfc_event *evt, 1396 struct ibmvfc_host *vhost, unsigned long timeout) 1397{ 1398 u64 *crq_as_u64 = (u64 *) &evt->crq; 1399 int rc; 1400 1401 /* Copy the IU into the transfer area */ 1402 *evt->xfer_iu = evt->iu; 1403 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1404 evt->xfer_iu->cmd.tag = (u64)evt; 1405 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1406 evt->xfer_iu->mad_common.tag = (u64)evt; 1407 else 1408 BUG(); 1409 1410 list_add_tail(&evt->queue, &vhost->sent); 1411 init_timer(&evt->timer); 1412 1413 if (timeout) { 1414 evt->timer.data = (unsigned long) evt; 1415 evt->timer.expires = jiffies + (timeout * HZ); 1416 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; 1417 add_timer(&evt->timer); 1418 } 1419 1420 mb(); 1421 1422 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { 1423 list_del(&evt->queue); 1424 del_timer(&evt->timer); 1425 1426 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1427 * Firmware will send a CRQ with a transport event (0xFF) to 1428 * tell this client what has happened to the transport. This 1429 * will be handled in ibmvfc_handle_crq() 1430 */ 1431 if (rc == H_CLOSED) { 1432 if (printk_ratelimit()) 1433 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1434 if (evt->cmnd) 1435 scsi_dma_unmap(evt->cmnd); 1436 ibmvfc_free_event(evt); 1437 return SCSI_MLQUEUE_HOST_BUSY; 1438 } 1439 1440 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1441 if (evt->cmnd) { 1442 evt->cmnd->result = DID_ERROR << 16; 1443 evt->done = ibmvfc_scsi_eh_done; 1444 } else 1445 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; 1446 1447 evt->done(evt); 1448 } else 1449 ibmvfc_trc_start(evt); 1450 1451 return 0; 1452} 1453 1454/** 1455 * ibmvfc_log_error - Log an error for the failed command if appropriate 1456 * @evt: ibmvfc event to log 1457 * 1458 **/ 1459static void ibmvfc_log_error(struct ibmvfc_event *evt) 1460{ 1461 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1462 struct ibmvfc_host *vhost = evt->vhost; 1463 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1464 struct scsi_cmnd *cmnd = evt->cmnd; 1465 const char *err = unknown_error; 1466 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 1467 int logerr = 0; 1468 int rsp_code = 0; 1469 1470 if (index >= 0) { 1471 logerr = cmd_status[index].log; 1472 err = cmd_status[index].name; 1473 } 1474 1475 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1476 return; 1477 1478 if (rsp->flags & FCP_RSP_LEN_VALID) 1479 rsp_code = rsp->data.info.rsp_code; 1480 1481 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1482 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1483 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1484 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1485} 1486 1487/** 1488 * ibmvfc_relogin - Log back into the specified device 1489 * @sdev: scsi device struct 1490 * 1491 **/ 1492static void ibmvfc_relogin(struct scsi_device *sdev) 1493{ 1494 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1495 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1496 struct ibmvfc_target *tgt; 1497 1498 list_for_each_entry(tgt, &vhost->targets, queue) { 1499 if (rport == tgt->rport) { 1500 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 1501 break; 1502 } 1503 } 1504 1505 ibmvfc_reinit_host(vhost); 1506} 1507 1508/** 1509 * ibmvfc_scsi_done - Handle responses from commands 1510 * @evt: ibmvfc event to be handled 1511 * 1512 * Used as a callback when sending scsi cmds. 1513 **/ 1514static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1515{ 1516 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1517 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1518 struct scsi_cmnd *cmnd = evt->cmnd; 1519 u32 rsp_len = 0; 1520 u32 sense_len = rsp->fcp_sense_len; 1521 1522 if (cmnd) { 1523 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) 1524 scsi_set_resid(cmnd, vfc_cmd->adapter_resid); 1525 else if (rsp->flags & FCP_RESID_UNDER) 1526 scsi_set_resid(cmnd, rsp->fcp_resid); 1527 else 1528 scsi_set_resid(cmnd, 0); 1529 1530 if (vfc_cmd->status) { 1531 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1532 1533 if (rsp->flags & FCP_RSP_LEN_VALID) 1534 rsp_len = rsp->fcp_rsp_len; 1535 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1536 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1537 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1538 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1539 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED)) 1540 ibmvfc_relogin(cmnd->device); 1541 1542 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1543 cmnd->result = (DID_ERROR << 16); 1544 1545 ibmvfc_log_error(evt); 1546 } 1547 1548 if (!cmnd->result && 1549 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1550 cmnd->result = (DID_ERROR << 16); 1551 1552 scsi_dma_unmap(cmnd); 1553 cmnd->scsi_done(cmnd); 1554 } 1555 1556 if (evt->eh_comp) 1557 complete(evt->eh_comp); 1558 1559 ibmvfc_free_event(evt); 1560} 1561 1562/** 1563 * ibmvfc_host_chkready - Check if the host can accept commands 1564 * @vhost: struct ibmvfc host 1565 * 1566 * Returns: 1567 * 1 if host can accept command / 0 if not 1568 **/ 1569static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1570{ 1571 int result = 0; 1572 1573 switch (vhost->state) { 1574 case IBMVFC_LINK_DEAD: 1575 case IBMVFC_HOST_OFFLINE: 1576 result = DID_NO_CONNECT << 16; 1577 break; 1578 case IBMVFC_NO_CRQ: 1579 case IBMVFC_INITIALIZING: 1580 case IBMVFC_HALTED: 1581 case IBMVFC_LINK_DOWN: 1582 result = DID_REQUEUE << 16; 1583 break; 1584 case IBMVFC_ACTIVE: 1585 result = 0; 1586 break; 1587 }; 1588 1589 return result; 1590} 1591 1592/** 1593 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1594 * @cmnd: struct scsi_cmnd to be executed 1595 * @done: Callback function to be called when cmnd is completed 1596 * 1597 * Returns: 1598 * 0 on success / other on failure 1599 **/ 1600static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, 1601 void (*done) (struct scsi_cmnd *)) 1602{ 1603 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1604 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1605 struct ibmvfc_cmd *vfc_cmd; 1606 struct ibmvfc_event *evt; 1607 u8 tag[2]; 1608 int rc; 1609 1610 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1611 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1612 cmnd->result = rc; 1613 done(cmnd); 1614 return 0; 1615 } 1616 1617 cmnd->result = (DID_OK << 16); 1618 evt = ibmvfc_get_event(vhost); 1619 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1620 evt->cmnd = cmnd; 1621 cmnd->scsi_done = done; 1622 vfc_cmd = &evt->iu.cmd; 1623 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1624 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1625 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); 1626 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; 1627 vfc_cmd->payload_len = sizeof(vfc_cmd->iu); 1628 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); 1629 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; 1630 vfc_cmd->tgt_scsi_id = rport->port_id; 1631 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); 1632 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1633 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1634 1635 if (scsi_populate_tag_msg(cmnd, tag)) { 1636 vfc_cmd->task_tag = tag[1]; 1637 switch (tag[0]) { 1638 case MSG_SIMPLE_TAG: 1639 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1640 break; 1641 case MSG_HEAD_TAG: 1642 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; 1643 break; 1644 case MSG_ORDERED_TAG: 1645 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; 1646 break; 1647 }; 1648 } 1649 1650 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1651 return ibmvfc_send_event(evt, vhost, 0); 1652 1653 ibmvfc_free_event(evt); 1654 if (rc == -ENOMEM) 1655 return SCSI_MLQUEUE_HOST_BUSY; 1656 1657 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1658 scmd_printk(KERN_ERR, cmnd, 1659 "Failed to map DMA buffer for command. rc=%d\n", rc); 1660 1661 cmnd->result = DID_ERROR << 16; 1662 done(cmnd); 1663 return 0; 1664} 1665 1666/** 1667 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1668 * @evt: ibmvfc event struct 1669 * 1670 **/ 1671static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1672{ 1673 /* copy the response back */ 1674 if (evt->sync_iu) 1675 *evt->sync_iu = *evt->xfer_iu; 1676 1677 complete(&evt->comp); 1678} 1679 1680/** 1681 * ibmvfc_reset_device - Reset the device with the specified reset type 1682 * @sdev: scsi device to reset 1683 * @type: reset type 1684 * @desc: reset type description for log messages 1685 * 1686 * Returns: 1687 * 0 on success / other on failure 1688 **/ 1689static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1690{ 1691 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1692 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1693 struct ibmvfc_cmd *tmf; 1694 struct ibmvfc_event *evt = NULL; 1695 union ibmvfc_iu rsp_iu; 1696 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1697 int rsp_rc = -EBUSY; 1698 unsigned long flags; 1699 int rsp_code = 0; 1700 1701 spin_lock_irqsave(vhost->host->host_lock, flags); 1702 if (vhost->state == IBMVFC_ACTIVE) { 1703 evt = ibmvfc_get_event(vhost); 1704 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1705 1706 tmf = &evt->iu.cmd; 1707 memset(tmf, 0, sizeof(*tmf)); 1708 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1709 tmf->resp.len = sizeof(tmf->rsp); 1710 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1711 tmf->payload_len = sizeof(tmf->iu); 1712 tmf->resp_len = sizeof(tmf->rsp); 1713 tmf->cancel_key = (unsigned long)sdev->hostdata; 1714 tmf->tgt_scsi_id = rport->port_id; 1715 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1716 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1717 tmf->iu.tmf_flags = type; 1718 evt->sync_iu = &rsp_iu; 1719 1720 init_completion(&evt->comp); 1721 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1722 } 1723 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1724 1725 if (rsp_rc != 0) { 1726 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 1727 desc, rsp_rc); 1728 return -EIO; 1729 } 1730 1731 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 1732 wait_for_completion(&evt->comp); 1733 1734 if (rsp_iu.cmd.status) { 1735 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 1736 rsp_code = fc_rsp->data.info.rsp_code; 1737 1738 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 1739 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 1740 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 1741 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 1742 fc_rsp->scsi_status); 1743 rsp_rc = -EIO; 1744 } else 1745 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 1746 1747 spin_lock_irqsave(vhost->host->host_lock, flags); 1748 ibmvfc_free_event(evt); 1749 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1750 return rsp_rc; 1751} 1752 1753/** 1754 * ibmvfc_abort_task_set - Abort outstanding commands to the device 1755 * @sdev: scsi device to abort commands 1756 * 1757 * This sends an Abort Task Set to the VIOS for the specified device. This does 1758 * NOT send any cancel to the VIOS. That must be done separately. 1759 * 1760 * Returns: 1761 * 0 on success / other on failure 1762 **/ 1763static int ibmvfc_abort_task_set(struct scsi_device *sdev) 1764{ 1765 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1766 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1767 struct ibmvfc_cmd *tmf; 1768 struct ibmvfc_event *evt, *found_evt; 1769 union ibmvfc_iu rsp_iu; 1770 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1771 int rsp_rc = -EBUSY; 1772 unsigned long flags; 1773 int rsp_code = 0; 1774 1775 spin_lock_irqsave(vhost->host->host_lock, flags); 1776 found_evt = NULL; 1777 list_for_each_entry(evt, &vhost->sent, queue) { 1778 if (evt->cmnd && evt->cmnd->device == sdev) { 1779 found_evt = evt; 1780 break; 1781 } 1782 } 1783 1784 if (!found_evt) { 1785 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1786 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 1787 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1788 return 0; 1789 } 1790 1791 if (vhost->state == IBMVFC_ACTIVE) { 1792 evt = ibmvfc_get_event(vhost); 1793 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1794 1795 tmf = &evt->iu.cmd; 1796 memset(tmf, 0, sizeof(*tmf)); 1797 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1798 tmf->resp.len = sizeof(tmf->rsp); 1799 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1800 tmf->payload_len = sizeof(tmf->iu); 1801 tmf->resp_len = sizeof(tmf->rsp); 1802 tmf->cancel_key = (unsigned long)sdev->hostdata; 1803 tmf->tgt_scsi_id = rport->port_id; 1804 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1805 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1806 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 1807 evt->sync_iu = &rsp_iu; 1808 1809 init_completion(&evt->comp); 1810 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1811 } 1812 1813 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1814 1815 if (rsp_rc != 0) { 1816 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 1817 return -EIO; 1818 } 1819 1820 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 1821 wait_for_completion(&evt->comp); 1822 1823 if (rsp_iu.cmd.status) { 1824 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 1825 rsp_code = fc_rsp->data.info.rsp_code; 1826 1827 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 1828 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 1829 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 1830 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 1831 fc_rsp->scsi_status); 1832 rsp_rc = -EIO; 1833 } else 1834 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 1835 1836 spin_lock_irqsave(vhost->host->host_lock, flags); 1837 ibmvfc_free_event(evt); 1838 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1839 return rsp_rc; 1840} 1841 1842/** 1843 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 1844 * @sdev: scsi device to cancel commands 1845 * @type: type of error recovery being performed 1846 * 1847 * This sends a cancel to the VIOS for the specified device. This does 1848 * NOT send any abort to the actual device. That must be done separately. 1849 * 1850 * Returns: 1851 * 0 on success / other on failure 1852 **/ 1853static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 1854{ 1855 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1856 struct scsi_target *starget = scsi_target(sdev); 1857 struct fc_rport *rport = starget_to_rport(starget); 1858 struct ibmvfc_tmf *tmf; 1859 struct ibmvfc_event *evt, *found_evt; 1860 union ibmvfc_iu rsp; 1861 int rsp_rc = -EBUSY; 1862 unsigned long flags; 1863 u16 status; 1864 1865 ENTER; 1866 spin_lock_irqsave(vhost->host->host_lock, flags); 1867 found_evt = NULL; 1868 list_for_each_entry(evt, &vhost->sent, queue) { 1869 if (evt->cmnd && evt->cmnd->device == sdev) { 1870 found_evt = evt; 1871 break; 1872 } 1873 } 1874 1875 if (!found_evt) { 1876 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1877 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 1878 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1879 return 0; 1880 } 1881 1882 if (vhost->state == IBMVFC_ACTIVE) { 1883 evt = ibmvfc_get_event(vhost); 1884 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1885 1886 tmf = &evt->iu.tmf; 1887 memset(tmf, 0, sizeof(*tmf)); 1888 tmf->common.version = 1; 1889 tmf->common.opcode = IBMVFC_TMF_MAD; 1890 tmf->common.length = sizeof(*tmf); 1891 tmf->scsi_id = rport->port_id; 1892 int_to_scsilun(sdev->lun, &tmf->lun); 1893 tmf->flags = (type | IBMVFC_TMF_LUA_VALID); 1894 tmf->cancel_key = (unsigned long)sdev->hostdata; 1895 tmf->my_cancel_key = (unsigned long)starget->hostdata; 1896 1897 evt->sync_iu = &rsp; 1898 init_completion(&evt->comp); 1899 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1900 } 1901 1902 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1903 1904 if (rsp_rc != 0) { 1905 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 1906 return -EIO; 1907 } 1908 1909 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 1910 1911 wait_for_completion(&evt->comp); 1912 status = rsp.mad_common.status; 1913 spin_lock_irqsave(vhost->host->host_lock, flags); 1914 ibmvfc_free_event(evt); 1915 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1916 1917 if (status != IBMVFC_MAD_SUCCESS) { 1918 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 1919 return -EIO; 1920 } 1921 1922 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 1923 return 0; 1924} 1925 1926/** 1927 * ibmvfc_match_target - Match function for specified target 1928 * @evt: ibmvfc event struct 1929 * @device: device to match (starget) 1930 * 1931 * Returns: 1932 * 1 if event matches starget / 0 if event does not match starget 1933 **/ 1934static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 1935{ 1936 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 1937 return 1; 1938 return 0; 1939} 1940 1941/** 1942 * ibmvfc_match_lun - Match function for specified LUN 1943 * @evt: ibmvfc event struct 1944 * @device: device to match (sdev) 1945 * 1946 * Returns: 1947 * 1 if event matches sdev / 0 if event does not match sdev 1948 **/ 1949static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 1950{ 1951 if (evt->cmnd && evt->cmnd->device == device) 1952 return 1; 1953 return 0; 1954} 1955 1956/** 1957 * ibmvfc_wait_for_ops - Wait for ops to complete 1958 * @vhost: ibmvfc host struct 1959 * @device: device to match (starget or sdev) 1960 * @match: match function 1961 * 1962 * Returns: 1963 * SUCCESS / FAILED 1964 **/ 1965static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 1966 int (*match) (struct ibmvfc_event *, void *)) 1967{ 1968 struct ibmvfc_event *evt; 1969 DECLARE_COMPLETION_ONSTACK(comp); 1970 int wait; 1971 unsigned long flags; 1972 signed long timeout = init_timeout * HZ; 1973 1974 ENTER; 1975 do { 1976 wait = 0; 1977 spin_lock_irqsave(vhost->host->host_lock, flags); 1978 list_for_each_entry(evt, &vhost->sent, queue) { 1979 if (match(evt, device)) { 1980 evt->eh_comp = ∁ 1981 wait++; 1982 } 1983 } 1984 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1985 1986 if (wait) { 1987 timeout = wait_for_completion_timeout(&comp, timeout); 1988 1989 if (!timeout) { 1990 wait = 0; 1991 spin_lock_irqsave(vhost->host->host_lock, flags); 1992 list_for_each_entry(evt, &vhost->sent, queue) { 1993 if (match(evt, device)) { 1994 evt->eh_comp = NULL; 1995 wait++; 1996 } 1997 } 1998 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1999 if (wait) 2000 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2001 LEAVE; 2002 return wait ? FAILED : SUCCESS; 2003 } 2004 } 2005 } while (wait); 2006 2007 LEAVE; 2008 return SUCCESS; 2009} 2010 2011/** 2012 * ibmvfc_eh_abort_handler - Abort a command 2013 * @cmd: scsi command to abort 2014 * 2015 * Returns: 2016 * SUCCESS / FAILED 2017 **/ 2018static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2019{ 2020 struct scsi_device *sdev = cmd->device; 2021 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2022 int cancel_rc, abort_rc; 2023 int rc = FAILED; 2024 2025 ENTER; 2026 ibmvfc_wait_while_resetting(vhost); 2027 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2028 abort_rc = ibmvfc_abort_task_set(sdev); 2029 2030 if (!cancel_rc && !abort_rc) 2031 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2032 2033 LEAVE; 2034 return rc; 2035} 2036 2037/** 2038 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2039 * @cmd: scsi command struct 2040 * 2041 * Returns: 2042 * SUCCESS / FAILED 2043 **/ 2044static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2045{ 2046 struct scsi_device *sdev = cmd->device; 2047 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2048 int cancel_rc, reset_rc; 2049 int rc = FAILED; 2050 2051 ENTER; 2052 ibmvfc_wait_while_resetting(vhost); 2053 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2054 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2055 2056 if (!cancel_rc && !reset_rc) 2057 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2058 2059 LEAVE; 2060 return rc; 2061} 2062 2063/** 2064 * ibmvfc_dev_cancel_all - Device iterated cancel all function 2065 * @sdev: scsi device struct 2066 * @data: return code 2067 * 2068 **/ 2069static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data) 2070{ 2071 unsigned long *rc = data; 2072 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2073} 2074 2075/** 2076 * ibmvfc_dev_abort_all - Device iterated abort task set function 2077 * @sdev: scsi device struct 2078 * @data: return code 2079 * 2080 **/ 2081static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) 2082{ 2083 unsigned long *rc = data; 2084 *rc |= ibmvfc_abort_task_set(sdev); 2085} 2086 2087/** 2088 * ibmvfc_eh_target_reset_handler - Reset the target 2089 * @cmd: scsi command struct 2090 * 2091 * Returns: 2092 * SUCCESS / FAILED 2093 **/ 2094static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2095{ 2096 struct scsi_device *sdev = cmd->device; 2097 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2098 struct scsi_target *starget = scsi_target(sdev); 2099 int reset_rc; 2100 int rc = FAILED; 2101 unsigned long cancel_rc = 0; 2102 2103 ENTER; 2104 ibmvfc_wait_while_resetting(vhost); 2105 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); 2106 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2107 2108 if (!cancel_rc && !reset_rc) 2109 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2110 2111 LEAVE; 2112 return rc; 2113} 2114 2115/** 2116 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2117 * @cmd: struct scsi_cmnd having problems 2118 * 2119 **/ 2120static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2121{ 2122 int rc; 2123 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2124 2125 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2126 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2127 return rc ? FAILED : SUCCESS; 2128} 2129 2130/** 2131 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2132 * @rport: rport struct 2133 * 2134 * Return value: 2135 * none 2136 **/ 2137static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2138{ 2139 struct scsi_target *starget = to_scsi_target(&rport->dev); 2140 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2141 struct ibmvfc_host *vhost = shost_priv(shost); 2142 unsigned long cancel_rc = 0; 2143 unsigned long abort_rc = 0; 2144 int rc = FAILED; 2145 2146 ENTER; 2147 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); 2148 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); 2149 2150 if (!cancel_rc && !abort_rc) 2151 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2152 2153 if (rc == FAILED) 2154 ibmvfc_issue_fc_host_lip(shost); 2155 LEAVE; 2156} 2157 2158static const struct { 2159 enum ibmvfc_async_event ae; 2160 const char *desc; 2161} ae_desc [] = { 2162 { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, 2163 { IBMVFC_AE_ELS_LOGO, "LOGO" }, 2164 { IBMVFC_AE_ELS_PRLO, "PRLO" }, 2165 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, 2166 { IBMVFC_AE_SCN_GROUP, "Group SCN" }, 2167 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, 2168 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, 2169 { IBMVFC_AE_LINK_UP, "Link Up" }, 2170 { IBMVFC_AE_LINK_DOWN, "Link Down" }, 2171 { IBMVFC_AE_LINK_DEAD, "Link Dead" }, 2172 { IBMVFC_AE_HALT, "Halt" }, 2173 { IBMVFC_AE_RESUME, "Resume" }, 2174 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, 2175}; 2176 2177static const char *unknown_ae = "Unknown async"; 2178 2179/** 2180 * ibmvfc_get_ae_desc - Get text description for async event 2181 * @ae: async event 2182 * 2183 **/ 2184static const char *ibmvfc_get_ae_desc(u64 ae) 2185{ 2186 int i; 2187 2188 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2189 if (ae_desc[i].ae == ae) 2190 return ae_desc[i].desc; 2191 2192 return unknown_ae; 2193} 2194 2195/** 2196 * ibmvfc_handle_async - Handle an async event from the adapter 2197 * @crq: crq to process 2198 * @vhost: ibmvfc host struct 2199 * 2200 **/ 2201static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2202 struct ibmvfc_host *vhost) 2203{ 2204 const char *desc = ibmvfc_get_ae_desc(crq->event); 2205 struct ibmvfc_target *tgt; 2206 2207 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx," 2208 " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name); 2209 2210 switch (crq->event) { 2211 case IBMVFC_AE_RESUME: 2212 switch (crq->link_state) { 2213 case IBMVFC_AE_LS_LINK_DOWN: 2214 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2215 break; 2216 case IBMVFC_AE_LS_LINK_DEAD: 2217 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2218 break; 2219 case IBMVFC_AE_LS_LINK_UP: 2220 case IBMVFC_AE_LS_LINK_BOUNCED: 2221 default: 2222 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2223 vhost->delay_init = 1; 2224 __ibmvfc_reset_host(vhost); 2225 break; 2226 }; 2227 2228 break; 2229 case IBMVFC_AE_LINK_UP: 2230 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2231 vhost->delay_init = 1; 2232 __ibmvfc_reset_host(vhost); 2233 break; 2234 case IBMVFC_AE_SCN_FABRIC: 2235 case IBMVFC_AE_SCN_DOMAIN: 2236 vhost->events_to_log |= IBMVFC_AE_RSCN; 2237 vhost->delay_init = 1; 2238 __ibmvfc_reset_host(vhost); 2239 break; 2240 case IBMVFC_AE_SCN_NPORT: 2241 case IBMVFC_AE_SCN_GROUP: 2242 vhost->events_to_log |= IBMVFC_AE_RSCN; 2243 ibmvfc_reinit_host(vhost); 2244 break; 2245 case IBMVFC_AE_ELS_LOGO: 2246 case IBMVFC_AE_ELS_PRLO: 2247 case IBMVFC_AE_ELS_PLOGI: 2248 list_for_each_entry(tgt, &vhost->targets, queue) { 2249 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 2250 break; 2251 if (crq->scsi_id && tgt->scsi_id != crq->scsi_id) 2252 continue; 2253 if (crq->wwpn && tgt->ids.port_name != crq->wwpn) 2254 continue; 2255 if (crq->node_name && tgt->ids.node_name != crq->node_name) 2256 continue; 2257 if (tgt->need_login && crq->event == IBMVFC_AE_ELS_LOGO) 2258 tgt->logo_rcvd = 1; 2259 if (!tgt->need_login || crq->event == IBMVFC_AE_ELS_PLOGI) { 2260 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2261 ibmvfc_reinit_host(vhost); 2262 } 2263 } 2264 break; 2265 case IBMVFC_AE_LINK_DOWN: 2266 case IBMVFC_AE_ADAPTER_FAILED: 2267 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2268 break; 2269 case IBMVFC_AE_LINK_DEAD: 2270 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2271 break; 2272 case IBMVFC_AE_HALT: 2273 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2274 break; 2275 default: 2276 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2277 break; 2278 }; 2279} 2280 2281/** 2282 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2283 * @crq: Command/Response queue 2284 * @vhost: ibmvfc host struct 2285 * 2286 **/ 2287static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2288{ 2289 long rc; 2290 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; 2291 2292 switch (crq->valid) { 2293 case IBMVFC_CRQ_INIT_RSP: 2294 switch (crq->format) { 2295 case IBMVFC_CRQ_INIT: 2296 dev_info(vhost->dev, "Partner initialized\n"); 2297 /* Send back a response */ 2298 rc = ibmvfc_send_crq_init_complete(vhost); 2299 if (rc == 0) 2300 ibmvfc_init_host(vhost, 0); 2301 else 2302 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2303 break; 2304 case IBMVFC_CRQ_INIT_COMPLETE: 2305 dev_info(vhost->dev, "Partner initialization complete\n"); 2306 ibmvfc_init_host(vhost, 0); 2307 break; 2308 default: 2309 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2310 } 2311 return; 2312 case IBMVFC_CRQ_XPORT_EVENT: 2313 vhost->state = IBMVFC_NO_CRQ; 2314 vhost->logged_in = 0; 2315 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2316 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2317 /* We need to re-setup the interpartition connection */ 2318 dev_info(vhost->dev, "Re-enabling adapter\n"); 2319 vhost->client_migrated = 1; 2320 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2321 if ((rc = ibmvfc_reenable_crq_queue(vhost)) || 2322 (rc = ibmvfc_send_crq_init(vhost))) { 2323 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2324 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); 2325 } else 2326 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2327 } else { 2328 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2329 2330 ibmvfc_purge_requests(vhost, DID_ERROR); 2331 if ((rc = ibmvfc_reset_crq(vhost)) || 2332 (rc = ibmvfc_send_crq_init(vhost))) { 2333 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2334 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); 2335 } else 2336 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2337 } 2338 return; 2339 case IBMVFC_CRQ_CMD_RSP: 2340 break; 2341 default: 2342 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2343 return; 2344 } 2345 2346 if (crq->format == IBMVFC_ASYNC_EVENT) 2347 return; 2348 2349 /* The only kind of payload CRQs we should get are responses to 2350 * things we send. Make sure this response is to something we 2351 * actually sent 2352 */ 2353 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2354 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2355 crq->ioba); 2356 return; 2357 } 2358 2359 if (unlikely(atomic_read(&evt->free))) { 2360 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2361 crq->ioba); 2362 return; 2363 } 2364 2365 del_timer(&evt->timer); 2366 list_del(&evt->queue); 2367 ibmvfc_trc_end(evt); 2368 evt->done(evt); 2369} 2370 2371/** 2372 * ibmvfc_scan_finished - Check if the device scan is done. 2373 * @shost: scsi host struct 2374 * @time: current elapsed time 2375 * 2376 * Returns: 2377 * 0 if scan is not done / 1 if scan is done 2378 **/ 2379static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2380{ 2381 unsigned long flags; 2382 struct ibmvfc_host *vhost = shost_priv(shost); 2383 int done = 0; 2384 2385 spin_lock_irqsave(shost->host_lock, flags); 2386 if (time >= (init_timeout * HZ)) { 2387 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2388 "continuing initialization\n", init_timeout); 2389 done = 1; 2390 } 2391 2392 if (vhost->scan_complete) 2393 done = 1; 2394 spin_unlock_irqrestore(shost->host_lock, flags); 2395 return done; 2396} 2397 2398/** 2399 * ibmvfc_slave_alloc - Setup the device's task set value 2400 * @sdev: struct scsi_device device to configure 2401 * 2402 * Set the device's task set value so that error handling works as 2403 * expected. 2404 * 2405 * Returns: 2406 * 0 on success / -ENXIO if device does not exist 2407 **/ 2408static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2409{ 2410 struct Scsi_Host *shost = sdev->host; 2411 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2412 struct ibmvfc_host *vhost = shost_priv(shost); 2413 unsigned long flags = 0; 2414 2415 if (!rport || fc_remote_port_chkready(rport)) 2416 return -ENXIO; 2417 2418 spin_lock_irqsave(shost->host_lock, flags); 2419 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2420 spin_unlock_irqrestore(shost->host_lock, flags); 2421 return 0; 2422} 2423 2424/** 2425 * ibmvfc_target_alloc - Setup the target's task set value 2426 * @starget: struct scsi_target 2427 * 2428 * Set the target's task set value so that error handling works as 2429 * expected. 2430 * 2431 * Returns: 2432 * 0 on success / -ENXIO if device does not exist 2433 **/ 2434static int ibmvfc_target_alloc(struct scsi_target *starget) 2435{ 2436 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2437 struct ibmvfc_host *vhost = shost_priv(shost); 2438 unsigned long flags = 0; 2439 2440 spin_lock_irqsave(shost->host_lock, flags); 2441 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2442 spin_unlock_irqrestore(shost->host_lock, flags); 2443 return 0; 2444} 2445 2446/** 2447 * ibmvfc_slave_configure - Configure the device 2448 * @sdev: struct scsi_device device to configure 2449 * 2450 * Enable allow_restart for a device if it is a disk. Adjust the 2451 * queue_depth here also. 2452 * 2453 * Returns: 2454 * 0 2455 **/ 2456static int ibmvfc_slave_configure(struct scsi_device *sdev) 2457{ 2458 struct Scsi_Host *shost = sdev->host; 2459 struct fc_rport *rport = starget_to_rport(sdev->sdev_target); 2460 unsigned long flags = 0; 2461 2462 spin_lock_irqsave(shost->host_lock, flags); 2463 if (sdev->type == TYPE_DISK) 2464 sdev->allow_restart = 1; 2465 2466 if (sdev->tagged_supported) { 2467 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 2468 scsi_activate_tcq(sdev, sdev->queue_depth); 2469 } else 2470 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2471 2472 rport->dev_loss_tmo = dev_loss_tmo; 2473 spin_unlock_irqrestore(shost->host_lock, flags); 2474 return 0; 2475} 2476 2477/** 2478 * ibmvfc_change_queue_depth - Change the device's queue depth 2479 * @sdev: scsi device struct 2480 * @qdepth: depth to set 2481 * 2482 * Return value: 2483 * actual depth set 2484 **/ 2485static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 2486{ 2487 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2488 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2489 2490 scsi_adjust_queue_depth(sdev, 0, qdepth); 2491 return sdev->queue_depth; 2492} 2493 2494/** 2495 * ibmvfc_change_queue_type - Change the device's queue type 2496 * @sdev: scsi device struct 2497 * @tag_type: type of tags to use 2498 * 2499 * Return value: 2500 * actual queue type set 2501 **/ 2502static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) 2503{ 2504 if (sdev->tagged_supported) { 2505 scsi_set_tag_type(sdev, tag_type); 2506 2507 if (tag_type) 2508 scsi_activate_tcq(sdev, sdev->queue_depth); 2509 else 2510 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2511 } else 2512 tag_type = 0; 2513 2514 return tag_type; 2515} 2516 2517static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2518 struct device_attribute *attr, char *buf) 2519{ 2520 struct Scsi_Host *shost = class_to_shost(dev); 2521 struct ibmvfc_host *vhost = shost_priv(shost); 2522 2523 return snprintf(buf, PAGE_SIZE, "%s\n", 2524 vhost->login_buf->resp.partition_name); 2525} 2526 2527static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2528 struct device_attribute *attr, char *buf) 2529{ 2530 struct Scsi_Host *shost = class_to_shost(dev); 2531 struct ibmvfc_host *vhost = shost_priv(shost); 2532 2533 return snprintf(buf, PAGE_SIZE, "%s\n", 2534 vhost->login_buf->resp.device_name); 2535} 2536 2537static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2538 struct device_attribute *attr, char *buf) 2539{ 2540 struct Scsi_Host *shost = class_to_shost(dev); 2541 struct ibmvfc_host *vhost = shost_priv(shost); 2542 2543 return snprintf(buf, PAGE_SIZE, "%s\n", 2544 vhost->login_buf->resp.port_loc_code); 2545} 2546 2547static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2548 struct device_attribute *attr, char *buf) 2549{ 2550 struct Scsi_Host *shost = class_to_shost(dev); 2551 struct ibmvfc_host *vhost = shost_priv(shost); 2552 2553 return snprintf(buf, PAGE_SIZE, "%s\n", 2554 vhost->login_buf->resp.drc_name); 2555} 2556 2557static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2558 struct device_attribute *attr, char *buf) 2559{ 2560 struct Scsi_Host *shost = class_to_shost(dev); 2561 struct ibmvfc_host *vhost = shost_priv(shost); 2562 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2563} 2564 2565static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 2566 struct device_attribute *attr, char *buf) 2567{ 2568 struct Scsi_Host *shost = class_to_shost(dev); 2569 struct ibmvfc_host *vhost = shost_priv(shost); 2570 return snprintf(buf, PAGE_SIZE, "%llx\n", vhost->login_buf->resp.capabilities); 2571} 2572 2573/** 2574 * ibmvfc_show_log_level - Show the adapter's error logging level 2575 * @dev: class device struct 2576 * @buf: buffer 2577 * 2578 * Return value: 2579 * number of bytes printed to buffer 2580 **/ 2581static ssize_t ibmvfc_show_log_level(struct device *dev, 2582 struct device_attribute *attr, char *buf) 2583{ 2584 struct Scsi_Host *shost = class_to_shost(dev); 2585 struct ibmvfc_host *vhost = shost_priv(shost); 2586 unsigned long flags = 0; 2587 int len; 2588 2589 spin_lock_irqsave(shost->host_lock, flags); 2590 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2591 spin_unlock_irqrestore(shost->host_lock, flags); 2592 return len; 2593} 2594 2595/** 2596 * ibmvfc_store_log_level - Change the adapter's error logging level 2597 * @dev: class device struct 2598 * @buf: buffer 2599 * 2600 * Return value: 2601 * number of bytes printed to buffer 2602 **/ 2603static ssize_t ibmvfc_store_log_level(struct device *dev, 2604 struct device_attribute *attr, 2605 const char *buf, size_t count) 2606{ 2607 struct Scsi_Host *shost = class_to_shost(dev); 2608 struct ibmvfc_host *vhost = shost_priv(shost); 2609 unsigned long flags = 0; 2610 2611 spin_lock_irqsave(shost->host_lock, flags); 2612 vhost->log_level = simple_strtoul(buf, NULL, 10); 2613 spin_unlock_irqrestore(shost->host_lock, flags); 2614 return strlen(buf); 2615} 2616 2617static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 2618static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 2619static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 2620static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 2621static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 2622static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 2623static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 2624 ibmvfc_show_log_level, ibmvfc_store_log_level); 2625 2626#ifdef CONFIG_SCSI_IBMVFC_TRACE 2627/** 2628 * ibmvfc_read_trace - Dump the adapter trace 2629 * @kobj: kobject struct 2630 * @bin_attr: bin_attribute struct 2631 * @buf: buffer 2632 * @off: offset 2633 * @count: buffer size 2634 * 2635 * Return value: 2636 * number of bytes printed to buffer 2637 **/ 2638static ssize_t ibmvfc_read_trace(struct kobject *kobj, 2639 struct bin_attribute *bin_attr, 2640 char *buf, loff_t off, size_t count) 2641{ 2642 struct device *dev = container_of(kobj, struct device, kobj); 2643 struct Scsi_Host *shost = class_to_shost(dev); 2644 struct ibmvfc_host *vhost = shost_priv(shost); 2645 unsigned long flags = 0; 2646 int size = IBMVFC_TRACE_SIZE; 2647 char *src = (char *)vhost->trace; 2648 2649 if (off > size) 2650 return 0; 2651 if (off + count > size) { 2652 size -= off; 2653 count = size; 2654 } 2655 2656 spin_lock_irqsave(shost->host_lock, flags); 2657 memcpy(buf, &src[off], count); 2658 spin_unlock_irqrestore(shost->host_lock, flags); 2659 return count; 2660} 2661 2662static struct bin_attribute ibmvfc_trace_attr = { 2663 .attr = { 2664 .name = "trace", 2665 .mode = S_IRUGO, 2666 }, 2667 .size = 0, 2668 .read = ibmvfc_read_trace, 2669}; 2670#endif 2671 2672static struct device_attribute *ibmvfc_attrs[] = { 2673 &dev_attr_partition_name, 2674 &dev_attr_device_name, 2675 &dev_attr_port_loc_code, 2676 &dev_attr_drc_name, 2677 &dev_attr_npiv_version, 2678 &dev_attr_capabilities, 2679 &dev_attr_log_level, 2680 NULL 2681}; 2682 2683static struct scsi_host_template driver_template = { 2684 .module = THIS_MODULE, 2685 .name = "IBM POWER Virtual FC Adapter", 2686 .proc_name = IBMVFC_NAME, 2687 .queuecommand = ibmvfc_queuecommand, 2688 .eh_abort_handler = ibmvfc_eh_abort_handler, 2689 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 2690 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 2691 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 2692 .slave_alloc = ibmvfc_slave_alloc, 2693 .slave_configure = ibmvfc_slave_configure, 2694 .target_alloc = ibmvfc_target_alloc, 2695 .scan_finished = ibmvfc_scan_finished, 2696 .change_queue_depth = ibmvfc_change_queue_depth, 2697 .change_queue_type = ibmvfc_change_queue_type, 2698 .cmd_per_lun = 16, 2699 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 2700 .this_id = -1, 2701 .sg_tablesize = SG_ALL, 2702 .max_sectors = IBMVFC_MAX_SECTORS, 2703 .use_clustering = ENABLE_CLUSTERING, 2704 .shost_attrs = ibmvfc_attrs, 2705}; 2706 2707/** 2708 * ibmvfc_next_async_crq - Returns the next entry in async queue 2709 * @vhost: ibmvfc host struct 2710 * 2711 * Returns: 2712 * Pointer to next entry in queue / NULL if empty 2713 **/ 2714static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 2715{ 2716 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 2717 struct ibmvfc_async_crq *crq; 2718 2719 crq = &async_crq->msgs[async_crq->cur]; 2720 if (crq->valid & 0x80) { 2721 if (++async_crq->cur == async_crq->size) 2722 async_crq->cur = 0; 2723 } else 2724 crq = NULL; 2725 2726 return crq; 2727} 2728 2729/** 2730 * ibmvfc_next_crq - Returns the next entry in message queue 2731 * @vhost: ibmvfc host struct 2732 * 2733 * Returns: 2734 * Pointer to next entry in queue / NULL if empty 2735 **/ 2736static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 2737{ 2738 struct ibmvfc_crq_queue *queue = &vhost->crq; 2739 struct ibmvfc_crq *crq; 2740 2741 crq = &queue->msgs[queue->cur]; 2742 if (crq->valid & 0x80) { 2743 if (++queue->cur == queue->size) 2744 queue->cur = 0; 2745 } else 2746 crq = NULL; 2747 2748 return crq; 2749} 2750 2751/** 2752 * ibmvfc_interrupt - Interrupt handler 2753 * @irq: number of irq to handle, not used 2754 * @dev_instance: ibmvfc_host that received interrupt 2755 * 2756 * Returns: 2757 * IRQ_HANDLED 2758 **/ 2759static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 2760{ 2761 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 2762 unsigned long flags; 2763 2764 spin_lock_irqsave(vhost->host->host_lock, flags); 2765 vio_disable_interrupts(to_vio_dev(vhost->dev)); 2766 tasklet_schedule(&vhost->tasklet); 2767 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2768 return IRQ_HANDLED; 2769} 2770 2771/** 2772 * ibmvfc_tasklet - Interrupt handler tasklet 2773 * @data: ibmvfc host struct 2774 * 2775 * Returns: 2776 * Nothing 2777 **/ 2778static void ibmvfc_tasklet(void *data) 2779{ 2780 struct ibmvfc_host *vhost = data; 2781 struct vio_dev *vdev = to_vio_dev(vhost->dev); 2782 struct ibmvfc_crq *crq; 2783 struct ibmvfc_async_crq *async; 2784 unsigned long flags; 2785 int done = 0; 2786 2787 spin_lock_irqsave(vhost->host->host_lock, flags); 2788 while (!done) { 2789 /* Pull all the valid messages off the async CRQ */ 2790 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 2791 ibmvfc_handle_async(async, vhost); 2792 async->valid = 0; 2793 } 2794 2795 /* Pull all the valid messages off the CRQ */ 2796 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 2797 ibmvfc_handle_crq(crq, vhost); 2798 crq->valid = 0; 2799 } 2800 2801 vio_enable_interrupts(vdev); 2802 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 2803 vio_disable_interrupts(vdev); 2804 ibmvfc_handle_async(async, vhost); 2805 async->valid = 0; 2806 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 2807 vio_disable_interrupts(vdev); 2808 ibmvfc_handle_crq(crq, vhost); 2809 crq->valid = 0; 2810 } else 2811 done = 1; 2812 } 2813 2814 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2815} 2816 2817/** 2818 * ibmvfc_init_tgt - Set the next init job step for the target 2819 * @tgt: ibmvfc target struct 2820 * @job_step: job step to perform 2821 * 2822 **/ 2823static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 2824 void (*job_step) (struct ibmvfc_target *)) 2825{ 2826 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 2827 tgt->job_step = job_step; 2828 wake_up(&tgt->vhost->work_wait_q); 2829} 2830 2831/** 2832 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 2833 * @tgt: ibmvfc target struct 2834 * @job_step: initialization job step 2835 * 2836 * Returns: 1 if step will be retried / 0 if not 2837 * 2838 **/ 2839static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 2840 void (*job_step) (struct ibmvfc_target *)) 2841{ 2842 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 2843 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2844 wake_up(&tgt->vhost->work_wait_q); 2845 return 0; 2846 } else 2847 ibmvfc_init_tgt(tgt, job_step); 2848 return 1; 2849} 2850 2851/* Defined in FC-LS */ 2852static const struct { 2853 int code; 2854 int retry; 2855 int logged_in; 2856} prli_rsp [] = { 2857 { 0, 1, 0 }, 2858 { 1, 0, 1 }, 2859 { 2, 1, 0 }, 2860 { 3, 1, 0 }, 2861 { 4, 0, 0 }, 2862 { 5, 0, 0 }, 2863 { 6, 0, 1 }, 2864 { 7, 0, 0 }, 2865 { 8, 1, 0 }, 2866}; 2867 2868/** 2869 * ibmvfc_get_prli_rsp - Find PRLI response index 2870 * @flags: PRLI response flags 2871 * 2872 **/ 2873static int ibmvfc_get_prli_rsp(u16 flags) 2874{ 2875 int i; 2876 int code = (flags & 0x0f00) >> 8; 2877 2878 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 2879 if (prli_rsp[i].code == code) 2880 return i; 2881 2882 return 0; 2883} 2884 2885/** 2886 * ibmvfc_tgt_prli_done - Completion handler for Process Login 2887 * @evt: ibmvfc event struct 2888 * 2889 **/ 2890static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 2891{ 2892 struct ibmvfc_target *tgt = evt->tgt; 2893 struct ibmvfc_host *vhost = evt->vhost; 2894 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 2895 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 2896 u32 status = rsp->common.status; 2897 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 2898 2899 vhost->discovery_threads--; 2900 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2901 switch (status) { 2902 case IBMVFC_MAD_SUCCESS: 2903 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 2904 parms->type, parms->flags, parms->service_parms); 2905 2906 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 2907 index = ibmvfc_get_prli_rsp(parms->flags); 2908 if (prli_rsp[index].logged_in) { 2909 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) { 2910 tgt->need_login = 0; 2911 tgt->ids.roles = 0; 2912 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC) 2913 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 2914 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC) 2915 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 2916 tgt->add_rport = 1; 2917 } else 2918 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2919 } else if (prli_rsp[index].retry) 2920 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2921 else 2922 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2923 } else 2924 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2925 break; 2926 case IBMVFC_MAD_DRIVER_FAILED: 2927 break; 2928 case IBMVFC_MAD_CRQ_ERROR: 2929 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2930 break; 2931 case IBMVFC_MAD_FAILED: 2932 default: 2933 if ((rsp->status & IBMVFC_VIOS_FAILURE) && rsp->error == IBMVFC_PLOGI_REQUIRED) 2934 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 2935 else if (tgt->logo_rcvd) 2936 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 2937 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 2938 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2939 else 2940 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2941 2942 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 2943 ibmvfc_get_cmd_error(rsp->status, rsp->error), 2944 rsp->status, rsp->error, status); 2945 break; 2946 }; 2947 2948 kref_put(&tgt->kref, ibmvfc_release_tgt); 2949 ibmvfc_free_event(evt); 2950 wake_up(&vhost->work_wait_q); 2951} 2952 2953/** 2954 * ibmvfc_tgt_send_prli - Send a process login 2955 * @tgt: ibmvfc target struct 2956 * 2957 **/ 2958static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 2959{ 2960 struct ibmvfc_process_login *prli; 2961 struct ibmvfc_host *vhost = tgt->vhost; 2962 struct ibmvfc_event *evt; 2963 2964 if (vhost->discovery_threads >= disc_threads) 2965 return; 2966 2967 kref_get(&tgt->kref); 2968 evt = ibmvfc_get_event(vhost); 2969 vhost->discovery_threads++; 2970 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 2971 evt->tgt = tgt; 2972 prli = &evt->iu.prli; 2973 memset(prli, 0, sizeof(*prli)); 2974 prli->common.version = 1; 2975 prli->common.opcode = IBMVFC_PROCESS_LOGIN; 2976 prli->common.length = sizeof(*prli); 2977 prli->scsi_id = tgt->scsi_id; 2978 2979 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 2980 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; 2981 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; 2982 2983 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 2984 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 2985 vhost->discovery_threads--; 2986 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2987 kref_put(&tgt->kref, ibmvfc_release_tgt); 2988 } else 2989 tgt_dbg(tgt, "Sent process login\n"); 2990} 2991 2992/** 2993 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 2994 * @evt: ibmvfc event struct 2995 * 2996 **/ 2997static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 2998{ 2999 struct ibmvfc_target *tgt = evt->tgt; 3000 struct ibmvfc_host *vhost = evt->vhost; 3001 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 3002 u32 status = rsp->common.status; 3003 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3004 3005 vhost->discovery_threads--; 3006 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3007 switch (status) { 3008 case IBMVFC_MAD_SUCCESS: 3009 tgt_dbg(tgt, "Port Login succeeded\n"); 3010 if (tgt->ids.port_name && 3011 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 3012 vhost->reinit = 1; 3013 tgt_dbg(tgt, "Port re-init required\n"); 3014 break; 3015 } 3016 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3017 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3018 tgt->ids.port_id = tgt->scsi_id; 3019 memcpy(&tgt->service_parms, &rsp->service_parms, 3020 sizeof(tgt->service_parms)); 3021 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3022 sizeof(tgt->service_parms_change)); 3023 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3024 break; 3025 case IBMVFC_MAD_DRIVER_FAILED: 3026 break; 3027 case IBMVFC_MAD_CRQ_ERROR: 3028 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3029 break; 3030 case IBMVFC_MAD_FAILED: 3031 default: 3032 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3033 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3034 else 3035 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3036 3037 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3038 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3039 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3040 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); 3041 break; 3042 }; 3043 3044 kref_put(&tgt->kref, ibmvfc_release_tgt); 3045 ibmvfc_free_event(evt); 3046 wake_up(&vhost->work_wait_q); 3047} 3048 3049/** 3050 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3051 * @tgt: ibmvfc target struct 3052 * 3053 **/ 3054static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3055{ 3056 struct ibmvfc_port_login *plogi; 3057 struct ibmvfc_host *vhost = tgt->vhost; 3058 struct ibmvfc_event *evt; 3059 3060 if (vhost->discovery_threads >= disc_threads) 3061 return; 3062 3063 kref_get(&tgt->kref); 3064 tgt->logo_rcvd = 0; 3065 evt = ibmvfc_get_event(vhost); 3066 vhost->discovery_threads++; 3067 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3068 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3069 evt->tgt = tgt; 3070 plogi = &evt->iu.plogi; 3071 memset(plogi, 0, sizeof(*plogi)); 3072 plogi->common.version = 1; 3073 plogi->common.opcode = IBMVFC_PORT_LOGIN; 3074 plogi->common.length = sizeof(*plogi); 3075 plogi->scsi_id = tgt->scsi_id; 3076 3077 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3078 vhost->discovery_threads--; 3079 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3080 kref_put(&tgt->kref, ibmvfc_release_tgt); 3081 } else 3082 tgt_dbg(tgt, "Sent port login\n"); 3083} 3084 3085/** 3086 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3087 * @evt: ibmvfc event struct 3088 * 3089 **/ 3090static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3091{ 3092 struct ibmvfc_target *tgt = evt->tgt; 3093 struct ibmvfc_host *vhost = evt->vhost; 3094 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3095 u32 status = rsp->common.status; 3096 3097 vhost->discovery_threads--; 3098 ibmvfc_free_event(evt); 3099 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3100 3101 switch (status) { 3102 case IBMVFC_MAD_SUCCESS: 3103 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3104 break; 3105 case IBMVFC_MAD_DRIVER_FAILED: 3106 kref_put(&tgt->kref, ibmvfc_release_tgt); 3107 wake_up(&vhost->work_wait_q); 3108 return; 3109 case IBMVFC_MAD_FAILED: 3110 default: 3111 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3112 break; 3113 }; 3114 3115 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3116 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3117 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3118 tgt->scsi_id != tgt->new_scsi_id) 3119 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3120 kref_put(&tgt->kref, ibmvfc_release_tgt); 3121 wake_up(&vhost->work_wait_q); 3122} 3123 3124/** 3125 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3126 * @tgt: ibmvfc target struct 3127 * 3128 **/ 3129static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3130{ 3131 struct ibmvfc_implicit_logout *mad; 3132 struct ibmvfc_host *vhost = tgt->vhost; 3133 struct ibmvfc_event *evt; 3134 3135 if (vhost->discovery_threads >= disc_threads) 3136 return; 3137 3138 kref_get(&tgt->kref); 3139 evt = ibmvfc_get_event(vhost); 3140 vhost->discovery_threads++; 3141 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3142 evt->tgt = tgt; 3143 mad = &evt->iu.implicit_logout; 3144 memset(mad, 0, sizeof(*mad)); 3145 mad->common.version = 1; 3146 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; 3147 mad->common.length = sizeof(*mad); 3148 mad->old_scsi_id = tgt->scsi_id; 3149 3150 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3151 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3152 vhost->discovery_threads--; 3153 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3154 kref_put(&tgt->kref, ibmvfc_release_tgt); 3155 } else 3156 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3157} 3158 3159/** 3160 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3161 * @mad: ibmvfc passthru mad struct 3162 * @tgt: ibmvfc target struct 3163 * 3164 * Returns: 3165 * 1 if PLOGI needed / 0 if PLOGI not needed 3166 **/ 3167static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3168 struct ibmvfc_target *tgt) 3169{ 3170 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3171 sizeof(tgt->ids.port_name))) 3172 return 1; 3173 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3174 sizeof(tgt->ids.node_name))) 3175 return 1; 3176 if (mad->fc_iu.response[6] != tgt->scsi_id) 3177 return 1; 3178 return 0; 3179} 3180 3181/** 3182 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3183 * @evt: ibmvfc event struct 3184 * 3185 **/ 3186static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3187{ 3188 struct ibmvfc_target *tgt = evt->tgt; 3189 struct ibmvfc_host *vhost = evt->vhost; 3190 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3191 u32 status = mad->common.status; 3192 u8 fc_reason, fc_explain; 3193 3194 vhost->discovery_threads--; 3195 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3196 del_timer(&tgt->timer); 3197 3198 switch (status) { 3199 case IBMVFC_MAD_SUCCESS: 3200 tgt_dbg(tgt, "ADISC succeeded\n"); 3201 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3202 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3203 break; 3204 case IBMVFC_MAD_DRIVER_FAILED: 3205 break; 3206 case IBMVFC_MAD_FAILED: 3207 default: 3208 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3209 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; 3210 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; 3211 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3212 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), 3213 mad->iu.status, mad->iu.error, 3214 ibmvfc_get_fc_type(fc_reason), fc_reason, 3215 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3216 break; 3217 }; 3218 3219 kref_put(&tgt->kref, ibmvfc_release_tgt); 3220 ibmvfc_free_event(evt); 3221 wake_up(&vhost->work_wait_q); 3222} 3223 3224/** 3225 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3226 * @evt: ibmvfc event struct 3227 * 3228 **/ 3229static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3230{ 3231 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3232 3233 memset(mad, 0, sizeof(*mad)); 3234 mad->common.version = 1; 3235 mad->common.opcode = IBMVFC_PASSTHRU; 3236 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 3237 mad->cmd_ioba.va = (u64)evt->crq.ioba + 3238 offsetof(struct ibmvfc_passthru_mad, iu); 3239 mad->cmd_ioba.len = sizeof(mad->iu); 3240 mad->iu.cmd_len = sizeof(mad->fc_iu.payload); 3241 mad->iu.rsp_len = sizeof(mad->fc_iu.response); 3242 mad->iu.cmd.va = (u64)evt->crq.ioba + 3243 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3244 offsetof(struct ibmvfc_passthru_fc_iu, payload); 3245 mad->iu.cmd.len = sizeof(mad->fc_iu.payload); 3246 mad->iu.rsp.va = (u64)evt->crq.ioba + 3247 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3248 offsetof(struct ibmvfc_passthru_fc_iu, response); 3249 mad->iu.rsp.len = sizeof(mad->fc_iu.response); 3250} 3251 3252/** 3253 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3254 * @evt: ibmvfc event struct 3255 * 3256 * Just cleanup this event struct. Everything else is handled by 3257 * the ADISC completion handler. If the ADISC never actually comes 3258 * back, we still have the timer running on the ADISC event struct 3259 * which will fire and cause the CRQ to get reset. 3260 * 3261 **/ 3262static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3263{ 3264 struct ibmvfc_host *vhost = evt->vhost; 3265 struct ibmvfc_target *tgt = evt->tgt; 3266 3267 tgt_dbg(tgt, "ADISC cancel complete\n"); 3268 vhost->abort_threads--; 3269 ibmvfc_free_event(evt); 3270 kref_put(&tgt->kref, ibmvfc_release_tgt); 3271 wake_up(&vhost->work_wait_q); 3272} 3273 3274/** 3275 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3276 * @tgt: ibmvfc target struct 3277 * 3278 * If an ADISC times out, send a cancel. If the cancel times 3279 * out, reset the CRQ. When the ADISC comes back as cancelled, 3280 * log back into the target. 3281 **/ 3282static void ibmvfc_adisc_timeout(struct ibmvfc_target *tgt) 3283{ 3284 struct ibmvfc_host *vhost = tgt->vhost; 3285 struct ibmvfc_event *evt; 3286 struct ibmvfc_tmf *tmf; 3287 unsigned long flags; 3288 int rc; 3289 3290 tgt_dbg(tgt, "ADISC timeout\n"); 3291 spin_lock_irqsave(vhost->host->host_lock, flags); 3292 if (vhost->abort_threads >= disc_threads || 3293 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3294 vhost->state != IBMVFC_INITIALIZING || 3295 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 3296 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3297 return; 3298 } 3299 3300 vhost->abort_threads++; 3301 kref_get(&tgt->kref); 3302 evt = ibmvfc_get_event(vhost); 3303 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 3304 3305 evt->tgt = tgt; 3306 tmf = &evt->iu.tmf; 3307 memset(tmf, 0, sizeof(*tmf)); 3308 tmf->common.version = 1; 3309 tmf->common.opcode = IBMVFC_TMF_MAD; 3310 tmf->common.length = sizeof(*tmf); 3311 tmf->scsi_id = tgt->scsi_id; 3312 tmf->cancel_key = tgt->cancel_key; 3313 3314 rc = ibmvfc_send_event(evt, vhost, default_timeout); 3315 3316 if (rc) { 3317 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 3318 vhost->abort_threads--; 3319 kref_put(&tgt->kref, ibmvfc_release_tgt); 3320 __ibmvfc_reset_host(vhost); 3321 } else 3322 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 3323 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3324} 3325 3326/** 3327 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3328 * @tgt: ibmvfc target struct 3329 * 3330 * When sending an ADISC we end up with two timers running. The 3331 * first timer is the timer in the ibmvfc target struct. If this 3332 * fires, we send a cancel to the target. The second timer is the 3333 * timer on the ibmvfc event for the ADISC, which is longer. If that 3334 * fires, it means the ADISC timed out and our attempt to cancel it 3335 * also failed, so we need to reset the CRQ. 3336 **/ 3337static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3338{ 3339 struct ibmvfc_passthru_mad *mad; 3340 struct ibmvfc_host *vhost = tgt->vhost; 3341 struct ibmvfc_event *evt; 3342 3343 if (vhost->discovery_threads >= disc_threads) 3344 return; 3345 3346 kref_get(&tgt->kref); 3347 evt = ibmvfc_get_event(vhost); 3348 vhost->discovery_threads++; 3349 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3350 evt->tgt = tgt; 3351 3352 ibmvfc_init_passthru(evt); 3353 mad = &evt->iu.passthru; 3354 mad->iu.flags = IBMVFC_FC_ELS; 3355 mad->iu.scsi_id = tgt->scsi_id; 3356 mad->iu.cancel_key = tgt->cancel_key; 3357 3358 mad->fc_iu.payload[0] = IBMVFC_ADISC; 3359 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3360 sizeof(vhost->login_buf->resp.port_name)); 3361 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3362 sizeof(vhost->login_buf->resp.node_name)); 3363 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; 3364 3365 if (timer_pending(&tgt->timer)) 3366 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 3367 else { 3368 tgt->timer.data = (unsigned long) tgt; 3369 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 3370 tgt->timer.function = (void (*)(unsigned long))ibmvfc_adisc_timeout; 3371 add_timer(&tgt->timer); 3372 } 3373 3374 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3375 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 3376 vhost->discovery_threads--; 3377 del_timer(&tgt->timer); 3378 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3379 kref_put(&tgt->kref, ibmvfc_release_tgt); 3380 } else 3381 tgt_dbg(tgt, "Sent ADISC\n"); 3382} 3383 3384/** 3385 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3386 * @evt: ibmvfc event struct 3387 * 3388 **/ 3389static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3390{ 3391 struct ibmvfc_target *tgt = evt->tgt; 3392 struct ibmvfc_host *vhost = evt->vhost; 3393 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3394 u32 status = rsp->common.status; 3395 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3396 3397 vhost->discovery_threads--; 3398 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3399 switch (status) { 3400 case IBMVFC_MAD_SUCCESS: 3401 tgt_dbg(tgt, "Query Target succeeded\n"); 3402 tgt->new_scsi_id = rsp->scsi_id; 3403 if (rsp->scsi_id != tgt->scsi_id) 3404 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3405 else 3406 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3407 break; 3408 case IBMVFC_MAD_DRIVER_FAILED: 3409 break; 3410 case IBMVFC_MAD_CRQ_ERROR: 3411 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3412 break; 3413 case IBMVFC_MAD_FAILED: 3414 default: 3415 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3416 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && 3417 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) 3418 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3419 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3420 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3421 else 3422 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3423 3424 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3425 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3426 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3427 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); 3428 break; 3429 }; 3430 3431 kref_put(&tgt->kref, ibmvfc_release_tgt); 3432 ibmvfc_free_event(evt); 3433 wake_up(&vhost->work_wait_q); 3434} 3435 3436/** 3437 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3438 * @tgt: ibmvfc target struct 3439 * 3440 **/ 3441static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3442{ 3443 struct ibmvfc_query_tgt *query_tgt; 3444 struct ibmvfc_host *vhost = tgt->vhost; 3445 struct ibmvfc_event *evt; 3446 3447 if (vhost->discovery_threads >= disc_threads) 3448 return; 3449 3450 kref_get(&tgt->kref); 3451 evt = ibmvfc_get_event(vhost); 3452 vhost->discovery_threads++; 3453 evt->tgt = tgt; 3454 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3455 query_tgt = &evt->iu.query_tgt; 3456 memset(query_tgt, 0, sizeof(*query_tgt)); 3457 query_tgt->common.version = 1; 3458 query_tgt->common.opcode = IBMVFC_QUERY_TARGET; 3459 query_tgt->common.length = sizeof(*query_tgt); 3460 query_tgt->wwpn = tgt->ids.port_name; 3461 3462 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3463 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3464 vhost->discovery_threads--; 3465 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3466 kref_put(&tgt->kref, ibmvfc_release_tgt); 3467 } else 3468 tgt_dbg(tgt, "Sent Query Target\n"); 3469} 3470 3471/** 3472 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3473 * @vhost: ibmvfc host struct 3474 * @scsi_id: SCSI ID to allocate target for 3475 * 3476 * Returns: 3477 * 0 on success / other on failure 3478 **/ 3479static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3480{ 3481 struct ibmvfc_target *tgt; 3482 unsigned long flags; 3483 3484 spin_lock_irqsave(vhost->host->host_lock, flags); 3485 list_for_each_entry(tgt, &vhost->targets, queue) { 3486 if (tgt->scsi_id == scsi_id) { 3487 if (tgt->need_login) 3488 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3489 goto unlock_out; 3490 } 3491 } 3492 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3493 3494 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 3495 if (!tgt) { 3496 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", 3497 scsi_id); 3498 return -ENOMEM; 3499 } 3500 3501 memset(tgt, 0, sizeof(*tgt)); 3502 tgt->scsi_id = scsi_id; 3503 tgt->new_scsi_id = scsi_id; 3504 tgt->vhost = vhost; 3505 tgt->need_login = 1; 3506 tgt->cancel_key = vhost->task_set++; 3507 init_timer(&tgt->timer); 3508 kref_init(&tgt->kref); 3509 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3510 spin_lock_irqsave(vhost->host->host_lock, flags); 3511 list_add_tail(&tgt->queue, &vhost->targets); 3512 3513unlock_out: 3514 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3515 return 0; 3516} 3517 3518/** 3519 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3520 * @vhost: ibmvfc host struct 3521 * 3522 * Returns: 3523 * 0 on success / other on failure 3524 **/ 3525static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3526{ 3527 int i, rc; 3528 3529 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3530 rc = ibmvfc_alloc_target(vhost, 3531 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); 3532 3533 return rc; 3534} 3535 3536/** 3537 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3538 * @evt: ibmvfc event struct 3539 * 3540 **/ 3541static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3542{ 3543 struct ibmvfc_host *vhost = evt->vhost; 3544 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3545 u32 mad_status = rsp->common.status; 3546 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3547 3548 switch (mad_status) { 3549 case IBMVFC_MAD_SUCCESS: 3550 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3551 vhost->num_targets = rsp->num_written; 3552 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3553 break; 3554 case IBMVFC_MAD_FAILED: 3555 level += ibmvfc_retry_host_init(vhost); 3556 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 3557 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3558 break; 3559 case IBMVFC_MAD_DRIVER_FAILED: 3560 break; 3561 default: 3562 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3563 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3564 break; 3565 } 3566 3567 ibmvfc_free_event(evt); 3568 wake_up(&vhost->work_wait_q); 3569} 3570 3571/** 3572 * ibmvfc_discover_targets - Send Discover Targets MAD 3573 * @vhost: ibmvfc host struct 3574 * 3575 **/ 3576static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3577{ 3578 struct ibmvfc_discover_targets *mad; 3579 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3580 3581 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3582 mad = &evt->iu.discover_targets; 3583 memset(mad, 0, sizeof(*mad)); 3584 mad->common.version = 1; 3585 mad->common.opcode = IBMVFC_DISC_TARGETS; 3586 mad->common.length = sizeof(*mad); 3587 mad->bufflen = vhost->disc_buf_sz; 3588 mad->buffer.va = vhost->disc_buf_dma; 3589 mad->buffer.len = vhost->disc_buf_sz; 3590 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3591 3592 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3593 ibmvfc_dbg(vhost, "Sent discover targets\n"); 3594 else 3595 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3596} 3597 3598/** 3599 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 3600 * @evt: ibmvfc event struct 3601 * 3602 **/ 3603static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 3604{ 3605 struct ibmvfc_host *vhost = evt->vhost; 3606 u32 mad_status = evt->xfer_iu->npiv_login.common.status; 3607 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 3608 unsigned int npiv_max_sectors; 3609 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3610 3611 switch (mad_status) { 3612 case IBMVFC_MAD_SUCCESS: 3613 ibmvfc_free_event(evt); 3614 break; 3615 case IBMVFC_MAD_FAILED: 3616 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3617 level += ibmvfc_retry_host_init(vhost); 3618 else 3619 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3620 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 3621 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3622 ibmvfc_free_event(evt); 3623 return; 3624 case IBMVFC_MAD_CRQ_ERROR: 3625 ibmvfc_retry_host_init(vhost); 3626 case IBMVFC_MAD_DRIVER_FAILED: 3627 ibmvfc_free_event(evt); 3628 return; 3629 default: 3630 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 3631 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3632 ibmvfc_free_event(evt); 3633 return; 3634 } 3635 3636 vhost->client_migrated = 0; 3637 3638 if (!(rsp->flags & IBMVFC_NATIVE_FC)) { 3639 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 3640 rsp->flags); 3641 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3642 wake_up(&vhost->work_wait_q); 3643 return; 3644 } 3645 3646 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { 3647 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 3648 rsp->max_cmds); 3649 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3650 wake_up(&vhost->work_wait_q); 3651 return; 3652 } 3653 3654 vhost->logged_in = 1; 3655 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); 3656 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 3657 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 3658 rsp->drc_name, npiv_max_sectors); 3659 3660 fc_host_fabric_name(vhost->host) = rsp->node_name; 3661 fc_host_node_name(vhost->host) = rsp->node_name; 3662 fc_host_port_name(vhost->host) = rsp->port_name; 3663 fc_host_port_id(vhost->host) = rsp->scsi_id; 3664 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 3665 fc_host_supported_classes(vhost->host) = 0; 3666 if (rsp->service_parms.class1_parms[0] & 0x80000000) 3667 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 3668 if (rsp->service_parms.class2_parms[0] & 0x80000000) 3669 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 3670 if (rsp->service_parms.class3_parms[0] & 0x80000000) 3671 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 3672 fc_host_maxframe_size(vhost->host) = 3673 rsp->service_parms.common.bb_rcv_sz & 0x0fff; 3674 3675 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; 3676 vhost->host->max_sectors = npiv_max_sectors; 3677 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 3678 wake_up(&vhost->work_wait_q); 3679} 3680 3681/** 3682 * ibmvfc_npiv_login - Sends NPIV login 3683 * @vhost: ibmvfc host struct 3684 * 3685 **/ 3686static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 3687{ 3688 struct ibmvfc_npiv_login_mad *mad; 3689 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3690 3691 ibmvfc_gather_partition_info(vhost); 3692 ibmvfc_set_login_info(vhost); 3693 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 3694 3695 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 3696 mad = &evt->iu.npiv_login; 3697 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 3698 mad->common.version = 1; 3699 mad->common.opcode = IBMVFC_NPIV_LOGIN; 3700 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); 3701 mad->buffer.va = vhost->login_buf_dma; 3702 mad->buffer.len = sizeof(*vhost->login_buf); 3703 3704 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3705 3706 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3707 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 3708 else 3709 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3710}; 3711 3712/** 3713 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 3714 * @vhost: ibmvfc host struct 3715 * 3716 **/ 3717static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 3718{ 3719 struct ibmvfc_host *vhost = evt->vhost; 3720 u32 mad_status = evt->xfer_iu->npiv_logout.common.status; 3721 3722 ibmvfc_free_event(evt); 3723 3724 switch (mad_status) { 3725 case IBMVFC_MAD_SUCCESS: 3726 if (list_empty(&vhost->sent) && 3727 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 3728 ibmvfc_init_host(vhost, 0); 3729 return; 3730 } 3731 break; 3732 case IBMVFC_MAD_FAILED: 3733 case IBMVFC_MAD_NOT_SUPPORTED: 3734 case IBMVFC_MAD_CRQ_ERROR: 3735 case IBMVFC_MAD_DRIVER_FAILED: 3736 default: 3737 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 3738 break; 3739 } 3740 3741 ibmvfc_hard_reset_host(vhost); 3742} 3743 3744/** 3745 * ibmvfc_npiv_logout - Issue an NPIV Logout 3746 * @vhost: ibmvfc host struct 3747 * 3748 **/ 3749static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 3750{ 3751 struct ibmvfc_npiv_logout_mad *mad; 3752 struct ibmvfc_event *evt; 3753 3754 evt = ibmvfc_get_event(vhost); 3755 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 3756 3757 mad = &evt->iu.npiv_logout; 3758 memset(mad, 0, sizeof(*mad)); 3759 mad->common.version = 1; 3760 mad->common.opcode = IBMVFC_NPIV_LOGOUT; 3761 mad->common.length = sizeof(struct ibmvfc_npiv_logout_mad); 3762 3763 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 3764 3765 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3766 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 3767 else 3768 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3769} 3770 3771/** 3772 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 3773 * @vhost: ibmvfc host struct 3774 * 3775 * Returns: 3776 * 1 if work to do / 0 if not 3777 **/ 3778static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 3779{ 3780 struct ibmvfc_target *tgt; 3781 3782 list_for_each_entry(tgt, &vhost->targets, queue) { 3783 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 3784 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 3785 return 1; 3786 } 3787 3788 return 0; 3789} 3790 3791/** 3792 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 3793 * @vhost: ibmvfc host struct 3794 * 3795 * Returns: 3796 * 1 if work to do / 0 if not 3797 **/ 3798static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 3799{ 3800 struct ibmvfc_target *tgt; 3801 3802 if (kthread_should_stop()) 3803 return 1; 3804 switch (vhost->action) { 3805 case IBMVFC_HOST_ACTION_NONE: 3806 case IBMVFC_HOST_ACTION_INIT_WAIT: 3807 case IBMVFC_HOST_ACTION_LOGO_WAIT: 3808 return 0; 3809 case IBMVFC_HOST_ACTION_TGT_INIT: 3810 case IBMVFC_HOST_ACTION_QUERY_TGTS: 3811 if (vhost->discovery_threads == disc_threads) 3812 return 0; 3813 list_for_each_entry(tgt, &vhost->targets, queue) 3814 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 3815 return 1; 3816 list_for_each_entry(tgt, &vhost->targets, queue) 3817 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 3818 return 0; 3819 return 1; 3820 case IBMVFC_HOST_ACTION_LOGO: 3821 case IBMVFC_HOST_ACTION_INIT: 3822 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 3823 case IBMVFC_HOST_ACTION_TGT_DEL: 3824 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 3825 case IBMVFC_HOST_ACTION_QUERY: 3826 default: 3827 break; 3828 }; 3829 3830 return 1; 3831} 3832 3833/** 3834 * ibmvfc_work_to_do - Is there task level work to do? 3835 * @vhost: ibmvfc host struct 3836 * 3837 * Returns: 3838 * 1 if work to do / 0 if not 3839 **/ 3840static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 3841{ 3842 unsigned long flags; 3843 int rc; 3844 3845 spin_lock_irqsave(vhost->host->host_lock, flags); 3846 rc = __ibmvfc_work_to_do(vhost); 3847 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3848 return rc; 3849} 3850 3851/** 3852 * ibmvfc_log_ae - Log async events if necessary 3853 * @vhost: ibmvfc host struct 3854 * @events: events to log 3855 * 3856 **/ 3857static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 3858{ 3859 if (events & IBMVFC_AE_RSCN) 3860 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 3861 if ((events & IBMVFC_AE_LINKDOWN) && 3862 vhost->state >= IBMVFC_HALTED) 3863 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 3864 if ((events & IBMVFC_AE_LINKUP) && 3865 vhost->state == IBMVFC_INITIALIZING) 3866 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 3867} 3868 3869/** 3870 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 3871 * @tgt: ibmvfc target struct 3872 * 3873 **/ 3874static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 3875{ 3876 struct ibmvfc_host *vhost = tgt->vhost; 3877 struct fc_rport *rport; 3878 unsigned long flags; 3879 3880 tgt_dbg(tgt, "Adding rport\n"); 3881 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 3882 spin_lock_irqsave(vhost->host->host_lock, flags); 3883 3884 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 3885 tgt_dbg(tgt, "Deleting rport\n"); 3886 list_del(&tgt->queue); 3887 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3888 fc_remote_port_delete(rport); 3889 del_timer_sync(&tgt->timer); 3890 kref_put(&tgt->kref, ibmvfc_release_tgt); 3891 return; 3892 } 3893 3894 if (rport) { 3895 tgt_dbg(tgt, "rport add succeeded\n"); 3896 tgt->rport = rport; 3897 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; 3898 rport->supported_classes = 0; 3899 tgt->target_id = rport->scsi_target_id; 3900 if (tgt->service_parms.class1_parms[0] & 0x80000000) 3901 rport->supported_classes |= FC_COS_CLASS1; 3902 if (tgt->service_parms.class2_parms[0] & 0x80000000) 3903 rport->supported_classes |= FC_COS_CLASS2; 3904 if (tgt->service_parms.class3_parms[0] & 0x80000000) 3905 rport->supported_classes |= FC_COS_CLASS3; 3906 } else 3907 tgt_dbg(tgt, "rport add failed\n"); 3908 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3909} 3910 3911/** 3912 * ibmvfc_do_work - Do task level work 3913 * @vhost: ibmvfc host struct 3914 * 3915 **/ 3916static void ibmvfc_do_work(struct ibmvfc_host *vhost) 3917{ 3918 struct ibmvfc_target *tgt; 3919 unsigned long flags; 3920 struct fc_rport *rport; 3921 3922 ibmvfc_log_ae(vhost, vhost->events_to_log); 3923 spin_lock_irqsave(vhost->host->host_lock, flags); 3924 vhost->events_to_log = 0; 3925 switch (vhost->action) { 3926 case IBMVFC_HOST_ACTION_NONE: 3927 case IBMVFC_HOST_ACTION_LOGO_WAIT: 3928 case IBMVFC_HOST_ACTION_INIT_WAIT: 3929 break; 3930 case IBMVFC_HOST_ACTION_LOGO: 3931 vhost->job_step(vhost); 3932 break; 3933 case IBMVFC_HOST_ACTION_INIT: 3934 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 3935 if (vhost->delay_init) { 3936 vhost->delay_init = 0; 3937 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3938 ssleep(15); 3939 return; 3940 } else 3941 vhost->job_step(vhost); 3942 break; 3943 case IBMVFC_HOST_ACTION_QUERY: 3944 list_for_each_entry(tgt, &vhost->targets, queue) 3945 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 3946 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 3947 break; 3948 case IBMVFC_HOST_ACTION_QUERY_TGTS: 3949 list_for_each_entry(tgt, &vhost->targets, queue) { 3950 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 3951 tgt->job_step(tgt); 3952 break; 3953 } 3954 } 3955 3956 if (!ibmvfc_dev_init_to_do(vhost)) 3957 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 3958 break; 3959 case IBMVFC_HOST_ACTION_TGT_DEL: 3960 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 3961 list_for_each_entry(tgt, &vhost->targets, queue) { 3962 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 3963 tgt_dbg(tgt, "Deleting rport\n"); 3964 rport = tgt->rport; 3965 tgt->rport = NULL; 3966 list_del(&tgt->queue); 3967 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3968 if (rport) 3969 fc_remote_port_delete(rport); 3970 del_timer_sync(&tgt->timer); 3971 kref_put(&tgt->kref, ibmvfc_release_tgt); 3972 return; 3973 } 3974 } 3975 3976 if (vhost->state == IBMVFC_INITIALIZING) { 3977 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 3978 if (vhost->reinit) { 3979 vhost->reinit = 0; 3980 scsi_block_requests(vhost->host); 3981 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 3982 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3983 } else { 3984 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 3985 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3986 wake_up(&vhost->init_wait_q); 3987 schedule_work(&vhost->rport_add_work_q); 3988 vhost->init_retries = 0; 3989 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3990 scsi_unblock_requests(vhost->host); 3991 } 3992 3993 return; 3994 } else { 3995 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 3996 vhost->job_step = ibmvfc_discover_targets; 3997 } 3998 } else { 3999 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4000 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4001 scsi_unblock_requests(vhost->host); 4002 wake_up(&vhost->init_wait_q); 4003 return; 4004 } 4005 break; 4006 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4007 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4008 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4009 ibmvfc_alloc_targets(vhost); 4010 spin_lock_irqsave(vhost->host->host_lock, flags); 4011 break; 4012 case IBMVFC_HOST_ACTION_TGT_INIT: 4013 list_for_each_entry(tgt, &vhost->targets, queue) { 4014 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4015 tgt->job_step(tgt); 4016 break; 4017 } 4018 } 4019 4020 if (!ibmvfc_dev_init_to_do(vhost)) 4021 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4022 break; 4023 default: 4024 break; 4025 }; 4026 4027 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4028} 4029 4030/** 4031 * ibmvfc_work - Do task level work 4032 * @data: ibmvfc host struct 4033 * 4034 * Returns: 4035 * zero 4036 **/ 4037static int ibmvfc_work(void *data) 4038{ 4039 struct ibmvfc_host *vhost = data; 4040 int rc; 4041 4042 set_user_nice(current, -20); 4043 4044 while (1) { 4045 rc = wait_event_interruptible(vhost->work_wait_q, 4046 ibmvfc_work_to_do(vhost)); 4047 4048 BUG_ON(rc); 4049 4050 if (kthread_should_stop()) 4051 break; 4052 4053 ibmvfc_do_work(vhost); 4054 } 4055 4056 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4057 return 0; 4058} 4059 4060/** 4061 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4062 * @vhost: ibmvfc host struct 4063 * 4064 * Allocates a page for messages, maps it for dma, and registers 4065 * the crq with the hypervisor. 4066 * 4067 * Return value: 4068 * zero on success / other on failure 4069 **/ 4070static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4071{ 4072 int rc, retrc = -ENOMEM; 4073 struct device *dev = vhost->dev; 4074 struct vio_dev *vdev = to_vio_dev(dev); 4075 struct ibmvfc_crq_queue *crq = &vhost->crq; 4076 4077 ENTER; 4078 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4079 4080 if (!crq->msgs) 4081 return -ENOMEM; 4082 4083 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4084 crq->msg_token = dma_map_single(dev, crq->msgs, 4085 PAGE_SIZE, DMA_BIDIRECTIONAL); 4086 4087 if (dma_mapping_error(dev, crq->msg_token)) 4088 goto map_failed; 4089 4090 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4091 crq->msg_token, PAGE_SIZE); 4092 4093 if (rc == H_RESOURCE) 4094 /* maybe kexecing and resource is busy. try a reset */ 4095 retrc = rc = ibmvfc_reset_crq(vhost); 4096 4097 if (rc == H_CLOSED) 4098 dev_warn(dev, "Partner adapter not ready\n"); 4099 else if (rc) { 4100 dev_warn(dev, "Error %d opening adapter\n", rc); 4101 goto reg_crq_failed; 4102 } 4103 4104 retrc = 0; 4105 4106 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4107 4108 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4109 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4110 goto req_irq_failed; 4111 } 4112 4113 if ((rc = vio_enable_interrupts(vdev))) { 4114 dev_err(dev, "Error %d enabling interrupts\n", rc); 4115 goto req_irq_failed; 4116 } 4117 4118 crq->cur = 0; 4119 LEAVE; 4120 return retrc; 4121 4122req_irq_failed: 4123 tasklet_kill(&vhost->tasklet); 4124 do { 4125 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4126 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4127reg_crq_failed: 4128 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4129map_failed: 4130 free_page((unsigned long)crq->msgs); 4131 return retrc; 4132} 4133 4134/** 4135 * ibmvfc_free_mem - Free memory for vhost 4136 * @vhost: ibmvfc host struct 4137 * 4138 * Return value: 4139 * none 4140 **/ 4141static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4142{ 4143 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4144 4145 ENTER; 4146 mempool_destroy(vhost->tgt_pool); 4147 kfree(vhost->trace); 4148 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4149 vhost->disc_buf_dma); 4150 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4151 vhost->login_buf, vhost->login_buf_dma); 4152 dma_pool_destroy(vhost->sg_pool); 4153 dma_unmap_single(vhost->dev, async_q->msg_token, 4154 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4155 free_page((unsigned long)async_q->msgs); 4156 LEAVE; 4157} 4158 4159/** 4160 * ibmvfc_alloc_mem - Allocate memory for vhost 4161 * @vhost: ibmvfc host struct 4162 * 4163 * Return value: 4164 * 0 on success / non-zero on failure 4165 **/ 4166static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 4167{ 4168 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4169 struct device *dev = vhost->dev; 4170 4171 ENTER; 4172 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 4173 if (!async_q->msgs) { 4174 dev_err(dev, "Couldn't allocate async queue.\n"); 4175 goto nomem; 4176 } 4177 4178 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 4179 async_q->msg_token = dma_map_single(dev, async_q->msgs, 4180 async_q->size * sizeof(*async_q->msgs), 4181 DMA_BIDIRECTIONAL); 4182 4183 if (dma_mapping_error(dev, async_q->msg_token)) { 4184 dev_err(dev, "Failed to map async queue\n"); 4185 goto free_async_crq; 4186 } 4187 4188 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 4189 SG_ALL * sizeof(struct srp_direct_buf), 4190 sizeof(struct srp_direct_buf), 0); 4191 4192 if (!vhost->sg_pool) { 4193 dev_err(dev, "Failed to allocate sg pool\n"); 4194 goto unmap_async_crq; 4195 } 4196 4197 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 4198 &vhost->login_buf_dma, GFP_KERNEL); 4199 4200 if (!vhost->login_buf) { 4201 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 4202 goto free_sg_pool; 4203 } 4204 4205 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 4206 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 4207 &vhost->disc_buf_dma, GFP_KERNEL); 4208 4209 if (!vhost->disc_buf) { 4210 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 4211 goto free_login_buffer; 4212 } 4213 4214 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 4215 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 4216 4217 if (!vhost->trace) 4218 goto free_disc_buffer; 4219 4220 vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 4221 sizeof(struct ibmvfc_target)); 4222 4223 if (!vhost->tgt_pool) { 4224 dev_err(dev, "Couldn't allocate target memory pool\n"); 4225 goto free_trace; 4226 } 4227 4228 LEAVE; 4229 return 0; 4230 4231free_trace: 4232 kfree(vhost->trace); 4233free_disc_buffer: 4234 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4235 vhost->disc_buf_dma); 4236free_login_buffer: 4237 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4238 vhost->login_buf, vhost->login_buf_dma); 4239free_sg_pool: 4240 dma_pool_destroy(vhost->sg_pool); 4241unmap_async_crq: 4242 dma_unmap_single(dev, async_q->msg_token, 4243 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4244free_async_crq: 4245 free_page((unsigned long)async_q->msgs); 4246nomem: 4247 LEAVE; 4248 return -ENOMEM; 4249} 4250 4251/** 4252 * ibmvfc_rport_add_thread - Worker thread for rport adds 4253 * @work: work struct 4254 * 4255 **/ 4256static void ibmvfc_rport_add_thread(struct work_struct *work) 4257{ 4258 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 4259 rport_add_work_q); 4260 struct ibmvfc_target *tgt; 4261 struct fc_rport *rport; 4262 unsigned long flags; 4263 int did_work; 4264 4265 ENTER; 4266 spin_lock_irqsave(vhost->host->host_lock, flags); 4267 do { 4268 did_work = 0; 4269 if (vhost->state != IBMVFC_ACTIVE) 4270 break; 4271 4272 list_for_each_entry(tgt, &vhost->targets, queue) { 4273 if (tgt->add_rport) { 4274 did_work = 1; 4275 tgt->add_rport = 0; 4276 kref_get(&tgt->kref); 4277 rport = tgt->rport; 4278 if (!rport) { 4279 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4280 ibmvfc_tgt_add_rport(tgt); 4281 } else if (get_device(&rport->dev)) { 4282 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4283 tgt_dbg(tgt, "Setting rport roles\n"); 4284 fc_remote_port_rolechg(rport, tgt->ids.roles); 4285 put_device(&rport->dev); 4286 } 4287 4288 kref_put(&tgt->kref, ibmvfc_release_tgt); 4289 spin_lock_irqsave(vhost->host->host_lock, flags); 4290 break; 4291 } 4292 } 4293 } while(did_work); 4294 4295 if (vhost->state == IBMVFC_ACTIVE) 4296 vhost->scan_complete = 1; 4297 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4298 LEAVE; 4299} 4300 4301/** 4302 * ibmvfc_probe - Adapter hot plug add entry point 4303 * @vdev: vio device struct 4304 * @id: vio device id struct 4305 * 4306 * Return value: 4307 * 0 on success / non-zero on failure 4308 **/ 4309static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4310{ 4311 struct ibmvfc_host *vhost; 4312 struct Scsi_Host *shost; 4313 struct device *dev = &vdev->dev; 4314 int rc = -ENOMEM; 4315 4316 ENTER; 4317 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4318 if (!shost) { 4319 dev_err(dev, "Couldn't allocate host data\n"); 4320 goto out; 4321 } 4322 4323 shost->transportt = ibmvfc_transport_template; 4324 shost->can_queue = max_requests; 4325 shost->max_lun = max_lun; 4326 shost->max_id = max_targets; 4327 shost->max_sectors = IBMVFC_MAX_SECTORS; 4328 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4329 shost->unique_id = shost->host_no; 4330 4331 vhost = shost_priv(shost); 4332 INIT_LIST_HEAD(&vhost->sent); 4333 INIT_LIST_HEAD(&vhost->free); 4334 INIT_LIST_HEAD(&vhost->targets); 4335 sprintf(vhost->name, IBMVFC_NAME); 4336 vhost->host = shost; 4337 vhost->dev = dev; 4338 vhost->partition_number = -1; 4339 vhost->log_level = log_level; 4340 vhost->task_set = 1; 4341 strcpy(vhost->partition_name, "UNKNOWN"); 4342 init_waitqueue_head(&vhost->work_wait_q); 4343 init_waitqueue_head(&vhost->init_wait_q); 4344 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 4345 4346 if ((rc = ibmvfc_alloc_mem(vhost))) 4347 goto free_scsi_host; 4348 4349 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4350 shost->host_no); 4351 4352 if (IS_ERR(vhost->work_thread)) { 4353 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4354 PTR_ERR(vhost->work_thread)); 4355 goto free_host_mem; 4356 } 4357 4358 if ((rc = ibmvfc_init_crq(vhost))) { 4359 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4360 goto kill_kthread; 4361 } 4362 4363 if ((rc = ibmvfc_init_event_pool(vhost))) { 4364 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4365 goto release_crq; 4366 } 4367 4368 if ((rc = scsi_add_host(shost, dev))) 4369 goto release_event_pool; 4370 4371 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4372 &ibmvfc_trace_attr))) { 4373 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4374 goto remove_shost; 4375 } 4376 4377 dev_set_drvdata(dev, vhost); 4378 spin_lock(&ibmvfc_driver_lock); 4379 list_add_tail(&vhost->queue, &ibmvfc_head); 4380 spin_unlock(&ibmvfc_driver_lock); 4381 4382 ibmvfc_send_crq_init(vhost); 4383 scsi_scan_host(shost); 4384 return 0; 4385 4386remove_shost: 4387 scsi_remove_host(shost); 4388release_event_pool: 4389 ibmvfc_free_event_pool(vhost); 4390release_crq: 4391 ibmvfc_release_crq_queue(vhost); 4392kill_kthread: 4393 kthread_stop(vhost->work_thread); 4394free_host_mem: 4395 ibmvfc_free_mem(vhost); 4396free_scsi_host: 4397 scsi_host_put(shost); 4398out: 4399 LEAVE; 4400 return rc; 4401} 4402 4403/** 4404 * ibmvfc_remove - Adapter hot plug remove entry point 4405 * @vdev: vio device struct 4406 * 4407 * Return value: 4408 * 0 4409 **/ 4410static int ibmvfc_remove(struct vio_dev *vdev) 4411{ 4412 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4413 unsigned long flags; 4414 4415 ENTER; 4416 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4417 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4418 ibmvfc_wait_while_resetting(vhost); 4419 ibmvfc_release_crq_queue(vhost); 4420 kthread_stop(vhost->work_thread); 4421 fc_remove_host(vhost->host); 4422 scsi_remove_host(vhost->host); 4423 4424 spin_lock_irqsave(vhost->host->host_lock, flags); 4425 ibmvfc_purge_requests(vhost, DID_ERROR); 4426 ibmvfc_free_event_pool(vhost); 4427 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4428 4429 ibmvfc_free_mem(vhost); 4430 spin_lock(&ibmvfc_driver_lock); 4431 list_del(&vhost->queue); 4432 spin_unlock(&ibmvfc_driver_lock); 4433 scsi_host_put(vhost->host); 4434 LEAVE; 4435 return 0; 4436} 4437 4438/** 4439 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4440 * @vdev: vio device struct 4441 * 4442 * Return value: 4443 * Number of bytes the driver will need to DMA map at the same time in 4444 * order to perform well. 4445 */ 4446static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4447{ 4448 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4449 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4450} 4451 4452static struct vio_device_id ibmvfc_device_table[] __devinitdata = { 4453 {"fcp", "IBM,vfc-client"}, 4454 { "", "" } 4455}; 4456MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4457 4458static struct vio_driver ibmvfc_driver = { 4459 .id_table = ibmvfc_device_table, 4460 .probe = ibmvfc_probe, 4461 .remove = ibmvfc_remove, 4462 .get_desired_dma = ibmvfc_get_desired_dma, 4463 .driver = { 4464 .name = IBMVFC_NAME, 4465 .owner = THIS_MODULE, 4466 } 4467}; 4468 4469static struct fc_function_template ibmvfc_transport_functions = { 4470 .show_host_fabric_name = 1, 4471 .show_host_node_name = 1, 4472 .show_host_port_name = 1, 4473 .show_host_supported_classes = 1, 4474 .show_host_port_type = 1, 4475 .show_host_port_id = 1, 4476 .show_host_maxframe_size = 1, 4477 4478 .get_host_port_state = ibmvfc_get_host_port_state, 4479 .show_host_port_state = 1, 4480 4481 .get_host_speed = ibmvfc_get_host_speed, 4482 .show_host_speed = 1, 4483 4484 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4485 .terminate_rport_io = ibmvfc_terminate_rport_io, 4486 4487 .show_rport_maxframe_size = 1, 4488 .show_rport_supported_classes = 1, 4489 4490 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4491 .show_rport_dev_loss_tmo = 1, 4492 4493 .get_starget_node_name = ibmvfc_get_starget_node_name, 4494 .show_starget_node_name = 1, 4495 4496 .get_starget_port_name = ibmvfc_get_starget_port_name, 4497 .show_starget_port_name = 1, 4498 4499 .get_starget_port_id = ibmvfc_get_starget_port_id, 4500 .show_starget_port_id = 1, 4501}; 4502 4503/** 4504 * ibmvfc_module_init - Initialize the ibmvfc module 4505 * 4506 * Return value: 4507 * 0 on success / other on failure 4508 **/ 4509static int __init ibmvfc_module_init(void) 4510{ 4511 int rc; 4512 4513 if (!firmware_has_feature(FW_FEATURE_VIO)) 4514 return -ENODEV; 4515 4516 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4517 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4518 4519 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4520 if (!ibmvfc_transport_template) 4521 return -ENOMEM; 4522 4523 rc = vio_register_driver(&ibmvfc_driver); 4524 if (rc) 4525 fc_release_transport(ibmvfc_transport_template); 4526 return rc; 4527} 4528 4529/** 4530 * ibmvfc_module_exit - Teardown the ibmvfc module 4531 * 4532 * Return value: 4533 * nothing 4534 **/ 4535static void __exit ibmvfc_module_exit(void) 4536{ 4537 vio_unregister_driver(&ibmvfc_driver); 4538 fc_release_transport(ibmvfc_transport_template); 4539} 4540 4541module_init(ibmvfc_module_init); 4542module_exit(ibmvfc_module_exit); 4543