1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 4 * 5 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 6 * 7 * Copyright (C) IBM Corporation, 2008 8 */ 9 10 #include <linux/module.h> 11 #include <linux/moduleparam.h> 12 #include <linux/dma-mapping.h> 13 #include <linux/dmapool.h> 14 #include <linux/delay.h> 15 #include <linux/interrupt.h> 16 #include <linux/kthread.h> 17 #include <linux/slab.h> 18 #include <linux/of.h> 19 #include <linux/pm.h> 20 #include <linux/stringify.h> 21 #include <linux/bsg-lib.h> 22 #include <asm/firmware.h> 23 #include <asm/irq.h> 24 #include <asm/vio.h> 25 #include <scsi/scsi.h> 26 #include <scsi/scsi_cmnd.h> 27 #include <scsi/scsi_host.h> 28 #include <scsi/scsi_device.h> 29 #include <scsi/scsi_tcq.h> 30 #include <scsi/scsi_transport_fc.h> 31 #include <scsi/scsi_bsg_fc.h> 32 #include "ibmvfc.h" 33 34 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 35 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 36 static u64 max_lun = IBMVFC_MAX_LUN; 37 static unsigned int max_targets = IBMVFC_MAX_TARGETS; 38 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 39 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 40 static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 41 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 42 static unsigned int cls3_error = IBMVFC_CLS3_ERROR; 43 static LIST_HEAD(ibmvfc_head); 44 static DEFINE_SPINLOCK(ibmvfc_driver_lock); 45 static struct scsi_transport_template *ibmvfc_transport_template; 46 47 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 48 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 49 MODULE_LICENSE("GPL"); 50 MODULE_VERSION(IBMVFC_DRIVER_VERSION); 51 52 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 53 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 54 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 55 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 56 MODULE_PARM_DESC(default_timeout, 57 "Default timeout in seconds for initialization and EH commands. " 58 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 59 module_param_named(max_requests, max_requests, uint, S_IRUGO); 60 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 61 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 62 module_param_named(max_lun, max_lun, ullong, S_IRUGO); 63 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 64 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 65 module_param_named(max_targets, max_targets, uint, S_IRUGO); 66 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 67 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 68 module_param_named(disc_threads, disc_threads, uint, S_IRUGO); 69 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 70 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 71 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 72 MODULE_PARM_DESC(debug, "Enable driver debug information. " 73 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 74 module_param_named(log_level, log_level, uint, 0); 75 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 76 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 77 module_param_named(cls3_error, cls3_error, uint, 0); 78 MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. " 79 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]"); 80 81 static const struct { 82 u16 status; 83 u16 error; 84 u8 result; 85 u8 retry; 86 int log; 87 char *name; 88 } cmd_status [] = { 89 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 90 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 91 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 92 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 93 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 94 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 95 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 96 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 97 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 98 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 99 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 100 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 101 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 102 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 103 104 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 105 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 106 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 107 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 108 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 109 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 110 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 111 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 112 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 113 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 114 115 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 116 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 117 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 118 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 119 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 120 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 121 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 122 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 123 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 124 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 125 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 126 127 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 128 { IBMVFC_FC_SCSI_ERROR, IBMVFC_COMMAND_FAILED, DID_ERROR, 0, 1, "PRLI to device failed." }, 129 }; 130 131 static void ibmvfc_npiv_login(struct ibmvfc_host *); 132 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 133 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 134 static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 135 static void ibmvfc_npiv_logout(struct ibmvfc_host *); 136 static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *); 137 static void ibmvfc_tgt_move_login(struct ibmvfc_target *); 138 139 static const char *unknown_error = "unknown error"; 140 141 static int ibmvfc_check_caps(struct ibmvfc_host *vhost, unsigned long cap_flags) 142 { 143 u64 host_caps = be64_to_cpu(vhost->login_buf->resp.capabilities); 144 145 return (host_caps & cap_flags) ? 1 : 0; 146 } 147 148 static struct ibmvfc_fcp_cmd_iu *ibmvfc_get_fcp_iu(struct ibmvfc_host *vhost, 149 struct ibmvfc_cmd *vfc_cmd) 150 { 151 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 152 return &vfc_cmd->v2.iu; 153 else 154 return &vfc_cmd->v1.iu; 155 } 156 157 static struct ibmvfc_fcp_rsp *ibmvfc_get_fcp_rsp(struct ibmvfc_host *vhost, 158 struct ibmvfc_cmd *vfc_cmd) 159 { 160 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 161 return &vfc_cmd->v2.rsp; 162 else 163 return &vfc_cmd->v1.rsp; 164 } 165 166 #ifdef CONFIG_SCSI_IBMVFC_TRACE 167 /** 168 * ibmvfc_trc_start - Log a start trace entry 169 * @evt: ibmvfc event struct 170 * 171 **/ 172 static void ibmvfc_trc_start(struct ibmvfc_event *evt) 173 { 174 struct ibmvfc_host *vhost = evt->vhost; 175 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 176 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 177 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 178 struct ibmvfc_trace_entry *entry; 179 180 entry = &vhost->trace[vhost->trace_index++]; 181 entry->evt = evt; 182 entry->time = jiffies; 183 entry->fmt = evt->crq.format; 184 entry->type = IBMVFC_TRC_START; 185 186 switch (entry->fmt) { 187 case IBMVFC_CMD_FORMAT: 188 entry->op_code = iu->cdb[0]; 189 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 190 entry->lun = scsilun_to_int(&iu->lun); 191 entry->tmf_flags = iu->tmf_flags; 192 entry->u.start.xfer_len = be32_to_cpu(iu->xfer_len); 193 break; 194 case IBMVFC_MAD_FORMAT: 195 entry->op_code = be32_to_cpu(mad->opcode); 196 break; 197 default: 198 break; 199 } 200 } 201 202 /** 203 * ibmvfc_trc_end - Log an end trace entry 204 * @evt: ibmvfc event struct 205 * 206 **/ 207 static void ibmvfc_trc_end(struct ibmvfc_event *evt) 208 { 209 struct ibmvfc_host *vhost = evt->vhost; 210 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 211 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 212 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 213 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 214 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; 215 216 entry->evt = evt; 217 entry->time = jiffies; 218 entry->fmt = evt->crq.format; 219 entry->type = IBMVFC_TRC_END; 220 221 switch (entry->fmt) { 222 case IBMVFC_CMD_FORMAT: 223 entry->op_code = iu->cdb[0]; 224 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 225 entry->lun = scsilun_to_int(&iu->lun); 226 entry->tmf_flags = iu->tmf_flags; 227 entry->u.end.status = be16_to_cpu(vfc_cmd->status); 228 entry->u.end.error = be16_to_cpu(vfc_cmd->error); 229 entry->u.end.fcp_rsp_flags = rsp->flags; 230 entry->u.end.rsp_code = rsp->data.info.rsp_code; 231 entry->u.end.scsi_status = rsp->scsi_status; 232 break; 233 case IBMVFC_MAD_FORMAT: 234 entry->op_code = be32_to_cpu(mad->opcode); 235 entry->u.end.status = be16_to_cpu(mad->status); 236 break; 237 default: 238 break; 239 240 } 241 } 242 243 #else 244 #define ibmvfc_trc_start(evt) do { } while (0) 245 #define ibmvfc_trc_end(evt) do { } while (0) 246 #endif 247 248 /** 249 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 250 * @status: status / error class 251 * @error: error 252 * 253 * Return value: 254 * index into cmd_status / -EINVAL on failure 255 **/ 256 static int ibmvfc_get_err_index(u16 status, u16 error) 257 { 258 int i; 259 260 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 261 if ((cmd_status[i].status & status) == cmd_status[i].status && 262 cmd_status[i].error == error) 263 return i; 264 265 return -EINVAL; 266 } 267 268 /** 269 * ibmvfc_get_cmd_error - Find the error description for the fcp response 270 * @status: status / error class 271 * @error: error 272 * 273 * Return value: 274 * error description string 275 **/ 276 static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 277 { 278 int rc = ibmvfc_get_err_index(status, error); 279 if (rc >= 0) 280 return cmd_status[rc].name; 281 return unknown_error; 282 } 283 284 /** 285 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 286 * @vfc_cmd: ibmvfc command struct 287 * 288 * Return value: 289 * SCSI result value to return for completed command 290 **/ 291 static int ibmvfc_get_err_result(struct ibmvfc_host *vhost, struct ibmvfc_cmd *vfc_cmd) 292 { 293 int err; 294 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 295 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 296 297 if ((rsp->flags & FCP_RSP_LEN_VALID) && 298 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 299 rsp->data.info.rsp_code)) 300 return DID_ERROR << 16; 301 302 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 303 if (err >= 0) 304 return rsp->scsi_status | (cmd_status[err].result << 16); 305 return rsp->scsi_status | (DID_ERROR << 16); 306 } 307 308 /** 309 * ibmvfc_retry_cmd - Determine if error status is retryable 310 * @status: status / error class 311 * @error: error 312 * 313 * Return value: 314 * 1 if error should be retried / 0 if it should not 315 **/ 316 static int ibmvfc_retry_cmd(u16 status, u16 error) 317 { 318 int rc = ibmvfc_get_err_index(status, error); 319 320 if (rc >= 0) 321 return cmd_status[rc].retry; 322 return 1; 323 } 324 325 static const char *unknown_fc_explain = "unknown fc explain"; 326 327 static const struct { 328 u16 fc_explain; 329 char *name; 330 } ls_explain [] = { 331 { 0x00, "no additional explanation" }, 332 { 0x01, "service parameter error - options" }, 333 { 0x03, "service parameter error - initiator control" }, 334 { 0x05, "service parameter error - recipient control" }, 335 { 0x07, "service parameter error - received data field size" }, 336 { 0x09, "service parameter error - concurrent seq" }, 337 { 0x0B, "service parameter error - credit" }, 338 { 0x0D, "invalid N_Port/F_Port_Name" }, 339 { 0x0E, "invalid node/Fabric Name" }, 340 { 0x0F, "invalid common service parameters" }, 341 { 0x11, "invalid association header" }, 342 { 0x13, "association header required" }, 343 { 0x15, "invalid originator S_ID" }, 344 { 0x17, "invalid OX_ID-RX-ID combination" }, 345 { 0x19, "command (request) already in progress" }, 346 { 0x1E, "N_Port Login requested" }, 347 { 0x1F, "Invalid N_Port_ID" }, 348 }; 349 350 static const struct { 351 u16 fc_explain; 352 char *name; 353 } gs_explain [] = { 354 { 0x00, "no additional explanation" }, 355 { 0x01, "port identifier not registered" }, 356 { 0x02, "port name not registered" }, 357 { 0x03, "node name not registered" }, 358 { 0x04, "class of service not registered" }, 359 { 0x06, "initial process associator not registered" }, 360 { 0x07, "FC-4 TYPEs not registered" }, 361 { 0x08, "symbolic port name not registered" }, 362 { 0x09, "symbolic node name not registered" }, 363 { 0x0A, "port type not registered" }, 364 { 0xF0, "authorization exception" }, 365 { 0xF1, "authentication exception" }, 366 { 0xF2, "data base full" }, 367 { 0xF3, "data base empty" }, 368 { 0xF4, "processing request" }, 369 { 0xF5, "unable to verify connection" }, 370 { 0xF6, "devices not in a common zone" }, 371 }; 372 373 /** 374 * ibmvfc_get_ls_explain - Return the FC Explain description text 375 * @status: FC Explain status 376 * 377 * Returns: 378 * error string 379 **/ 380 static const char *ibmvfc_get_ls_explain(u16 status) 381 { 382 int i; 383 384 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 385 if (ls_explain[i].fc_explain == status) 386 return ls_explain[i].name; 387 388 return unknown_fc_explain; 389 } 390 391 /** 392 * ibmvfc_get_gs_explain - Return the FC Explain description text 393 * @status: FC Explain status 394 * 395 * Returns: 396 * error string 397 **/ 398 static const char *ibmvfc_get_gs_explain(u16 status) 399 { 400 int i; 401 402 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 403 if (gs_explain[i].fc_explain == status) 404 return gs_explain[i].name; 405 406 return unknown_fc_explain; 407 } 408 409 static const struct { 410 enum ibmvfc_fc_type fc_type; 411 char *name; 412 } fc_type [] = { 413 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 414 { IBMVFC_PORT_REJECT, "port reject" }, 415 { IBMVFC_LS_REJECT, "ELS reject" }, 416 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 417 { IBMVFC_PORT_BUSY, "port busy" }, 418 { IBMVFC_BASIC_REJECT, "basic reject" }, 419 }; 420 421 static const char *unknown_fc_type = "unknown fc type"; 422 423 /** 424 * ibmvfc_get_fc_type - Return the FC Type description text 425 * @status: FC Type error status 426 * 427 * Returns: 428 * error string 429 **/ 430 static const char *ibmvfc_get_fc_type(u16 status) 431 { 432 int i; 433 434 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 435 if (fc_type[i].fc_type == status) 436 return fc_type[i].name; 437 438 return unknown_fc_type; 439 } 440 441 /** 442 * ibmvfc_set_tgt_action - Set the next init action for the target 443 * @tgt: ibmvfc target struct 444 * @action: action to perform 445 * 446 * Returns: 447 * 0 if action changed / non-zero if not changed 448 **/ 449 static int ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 450 enum ibmvfc_target_action action) 451 { 452 int rc = -EINVAL; 453 454 switch (tgt->action) { 455 case IBMVFC_TGT_ACTION_LOGOUT_RPORT: 456 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT || 457 action == IBMVFC_TGT_ACTION_DEL_RPORT) { 458 tgt->action = action; 459 rc = 0; 460 } 461 break; 462 case IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT: 463 if (action == IBMVFC_TGT_ACTION_DEL_RPORT || 464 action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 465 tgt->action = action; 466 rc = 0; 467 } 468 break; 469 case IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT: 470 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { 471 tgt->action = action; 472 rc = 0; 473 } 474 break; 475 case IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT: 476 if (action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 477 tgt->action = action; 478 rc = 0; 479 } 480 break; 481 case IBMVFC_TGT_ACTION_DEL_RPORT: 482 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 483 tgt->action = action; 484 rc = 0; 485 } 486 break; 487 case IBMVFC_TGT_ACTION_DELETED_RPORT: 488 break; 489 default: 490 tgt->action = action; 491 rc = 0; 492 break; 493 } 494 495 if (action >= IBMVFC_TGT_ACTION_LOGOUT_RPORT) 496 tgt->add_rport = 0; 497 498 return rc; 499 } 500 501 /** 502 * ibmvfc_set_host_state - Set the state for the host 503 * @vhost: ibmvfc host struct 504 * @state: state to set host to 505 * 506 * Returns: 507 * 0 if state changed / non-zero if not changed 508 **/ 509 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 510 enum ibmvfc_host_state state) 511 { 512 int rc = 0; 513 514 switch (vhost->state) { 515 case IBMVFC_HOST_OFFLINE: 516 rc = -EINVAL; 517 break; 518 default: 519 vhost->state = state; 520 break; 521 } 522 523 return rc; 524 } 525 526 /** 527 * ibmvfc_set_host_action - Set the next init action for the host 528 * @vhost: ibmvfc host struct 529 * @action: action to perform 530 * 531 **/ 532 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 533 enum ibmvfc_host_action action) 534 { 535 switch (action) { 536 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 537 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 538 vhost->action = action; 539 break; 540 case IBMVFC_HOST_ACTION_LOGO_WAIT: 541 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 542 vhost->action = action; 543 break; 544 case IBMVFC_HOST_ACTION_INIT_WAIT: 545 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 546 vhost->action = action; 547 break; 548 case IBMVFC_HOST_ACTION_QUERY: 549 switch (vhost->action) { 550 case IBMVFC_HOST_ACTION_INIT_WAIT: 551 case IBMVFC_HOST_ACTION_NONE: 552 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 553 vhost->action = action; 554 break; 555 default: 556 break; 557 } 558 break; 559 case IBMVFC_HOST_ACTION_TGT_INIT: 560 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 561 vhost->action = action; 562 break; 563 case IBMVFC_HOST_ACTION_INIT: 564 case IBMVFC_HOST_ACTION_TGT_DEL: 565 switch (vhost->action) { 566 case IBMVFC_HOST_ACTION_RESET: 567 case IBMVFC_HOST_ACTION_REENABLE: 568 break; 569 default: 570 vhost->action = action; 571 break; 572 } 573 break; 574 case IBMVFC_HOST_ACTION_LOGO: 575 case IBMVFC_HOST_ACTION_QUERY_TGTS: 576 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 577 case IBMVFC_HOST_ACTION_NONE: 578 case IBMVFC_HOST_ACTION_RESET: 579 case IBMVFC_HOST_ACTION_REENABLE: 580 default: 581 vhost->action = action; 582 break; 583 } 584 } 585 586 /** 587 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 588 * @vhost: ibmvfc host struct 589 * 590 * Return value: 591 * nothing 592 **/ 593 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 594 { 595 if (vhost->action == IBMVFC_HOST_ACTION_NONE && 596 vhost->state == IBMVFC_ACTIVE) { 597 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 598 scsi_block_requests(vhost->host); 599 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 600 } 601 } else 602 vhost->reinit = 1; 603 604 wake_up(&vhost->work_wait_q); 605 } 606 607 /** 608 * ibmvfc_del_tgt - Schedule cleanup and removal of the target 609 * @tgt: ibmvfc target struct 610 * @job_step: job step to perform 611 * 612 **/ 613 static void ibmvfc_del_tgt(struct ibmvfc_target *tgt) 614 { 615 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT)) 616 tgt->job_step = ibmvfc_tgt_implicit_logout_and_del; 617 wake_up(&tgt->vhost->work_wait_q); 618 } 619 620 /** 621 * ibmvfc_link_down - Handle a link down event from the adapter 622 * @vhost: ibmvfc host struct 623 * @state: ibmvfc host state to enter 624 * 625 **/ 626 static void ibmvfc_link_down(struct ibmvfc_host *vhost, 627 enum ibmvfc_host_state state) 628 { 629 struct ibmvfc_target *tgt; 630 631 ENTER; 632 scsi_block_requests(vhost->host); 633 list_for_each_entry(tgt, &vhost->targets, queue) 634 ibmvfc_del_tgt(tgt); 635 ibmvfc_set_host_state(vhost, state); 636 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 637 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 638 wake_up(&vhost->work_wait_q); 639 LEAVE; 640 } 641 642 /** 643 * ibmvfc_init_host - Start host initialization 644 * @vhost: ibmvfc host struct 645 * 646 * Return value: 647 * nothing 648 **/ 649 static void ibmvfc_init_host(struct ibmvfc_host *vhost) 650 { 651 struct ibmvfc_target *tgt; 652 653 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 654 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 655 dev_err(vhost->dev, 656 "Host initialization retries exceeded. Taking adapter offline\n"); 657 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 658 return; 659 } 660 } 661 662 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 663 memset(vhost->async_crq.msgs, 0, PAGE_SIZE); 664 vhost->async_crq.cur = 0; 665 666 list_for_each_entry(tgt, &vhost->targets, queue) 667 ibmvfc_del_tgt(tgt); 668 scsi_block_requests(vhost->host); 669 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 670 vhost->job_step = ibmvfc_npiv_login; 671 wake_up(&vhost->work_wait_q); 672 } 673 } 674 675 /** 676 * ibmvfc_send_crq - Send a CRQ 677 * @vhost: ibmvfc host struct 678 * @word1: the first 64 bits of the data 679 * @word2: the second 64 bits of the data 680 * 681 * Return value: 682 * 0 on success / other on failure 683 **/ 684 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 685 { 686 struct vio_dev *vdev = to_vio_dev(vhost->dev); 687 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 688 } 689 690 /** 691 * ibmvfc_send_crq_init - Send a CRQ init message 692 * @vhost: ibmvfc host struct 693 * 694 * Return value: 695 * 0 on success / other on failure 696 **/ 697 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 698 { 699 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 700 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 701 } 702 703 /** 704 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 705 * @vhost: ibmvfc host struct 706 * 707 * Return value: 708 * 0 on success / other on failure 709 **/ 710 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 711 { 712 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 713 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 714 } 715 716 /** 717 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 718 * @vhost: ibmvfc host struct 719 * 720 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 721 * the crq with the hypervisor. 722 **/ 723 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 724 { 725 long rc = 0; 726 struct vio_dev *vdev = to_vio_dev(vhost->dev); 727 struct ibmvfc_crq_queue *crq = &vhost->crq; 728 729 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 730 free_irq(vdev->irq, vhost); 731 tasklet_kill(&vhost->tasklet); 732 do { 733 if (rc) 734 msleep(100); 735 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 736 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 737 738 vhost->state = IBMVFC_NO_CRQ; 739 vhost->logged_in = 0; 740 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 741 free_page((unsigned long)crq->msgs); 742 } 743 744 /** 745 * ibmvfc_reenable_crq_queue - reenables the CRQ 746 * @vhost: ibmvfc host struct 747 * 748 * Return value: 749 * 0 on success / other on failure 750 **/ 751 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 752 { 753 int rc = 0; 754 struct vio_dev *vdev = to_vio_dev(vhost->dev); 755 756 /* Re-enable the CRQ */ 757 do { 758 if (rc) 759 msleep(100); 760 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 761 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 762 763 if (rc) 764 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 765 766 return rc; 767 } 768 769 /** 770 * ibmvfc_reset_crq - resets a crq after a failure 771 * @vhost: ibmvfc host struct 772 * 773 * Return value: 774 * 0 on success / other on failure 775 **/ 776 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 777 { 778 int rc = 0; 779 unsigned long flags; 780 struct vio_dev *vdev = to_vio_dev(vhost->dev); 781 struct ibmvfc_crq_queue *crq = &vhost->crq; 782 783 /* Close the CRQ */ 784 do { 785 if (rc) 786 msleep(100); 787 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 788 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 789 790 spin_lock_irqsave(vhost->host->host_lock, flags); 791 vhost->state = IBMVFC_NO_CRQ; 792 vhost->logged_in = 0; 793 794 /* Clean out the queue */ 795 memset(crq->msgs, 0, PAGE_SIZE); 796 crq->cur = 0; 797 798 /* And re-open it again */ 799 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 800 crq->msg_token, PAGE_SIZE); 801 802 if (rc == H_CLOSED) 803 /* Adapter is good, but other end is not ready */ 804 dev_warn(vhost->dev, "Partner adapter not ready\n"); 805 else if (rc != 0) 806 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 807 spin_unlock_irqrestore(vhost->host->host_lock, flags); 808 809 return rc; 810 } 811 812 /** 813 * ibmvfc_valid_event - Determines if event is valid. 814 * @pool: event_pool that contains the event 815 * @evt: ibmvfc event to be checked for validity 816 * 817 * Return value: 818 * 1 if event is valid / 0 if event is not valid 819 **/ 820 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 821 struct ibmvfc_event *evt) 822 { 823 int index = evt - pool->events; 824 if (index < 0 || index >= pool->size) /* outside of bounds */ 825 return 0; 826 if (evt != pool->events + index) /* unaligned */ 827 return 0; 828 return 1; 829 } 830 831 /** 832 * ibmvfc_free_event - Free the specified event 833 * @evt: ibmvfc_event to be freed 834 * 835 **/ 836 static void ibmvfc_free_event(struct ibmvfc_event *evt) 837 { 838 struct ibmvfc_host *vhost = evt->vhost; 839 struct ibmvfc_event_pool *pool = &vhost->pool; 840 841 BUG_ON(!ibmvfc_valid_event(pool, evt)); 842 BUG_ON(atomic_inc_return(&evt->free) != 1); 843 list_add_tail(&evt->queue, &vhost->free); 844 } 845 846 /** 847 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 848 * @evt: ibmvfc event struct 849 * 850 * This function does not setup any error status, that must be done 851 * before this function gets called. 852 **/ 853 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 854 { 855 struct scsi_cmnd *cmnd = evt->cmnd; 856 857 if (cmnd) { 858 scsi_dma_unmap(cmnd); 859 cmnd->scsi_done(cmnd); 860 } 861 862 if (evt->eh_comp) 863 complete(evt->eh_comp); 864 865 ibmvfc_free_event(evt); 866 } 867 868 /** 869 * ibmvfc_fail_request - Fail request with specified error code 870 * @evt: ibmvfc event struct 871 * @error_code: error code to fail request with 872 * 873 * Return value: 874 * none 875 **/ 876 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 877 { 878 if (evt->cmnd) { 879 evt->cmnd->result = (error_code << 16); 880 evt->done = ibmvfc_scsi_eh_done; 881 } else 882 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED); 883 884 list_del(&evt->queue); 885 del_timer(&evt->timer); 886 ibmvfc_trc_end(evt); 887 evt->done(evt); 888 } 889 890 /** 891 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 892 * @vhost: ibmvfc host struct 893 * @error_code: error code to fail requests with 894 * 895 * Return value: 896 * none 897 **/ 898 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 899 { 900 struct ibmvfc_event *evt, *pos; 901 902 ibmvfc_dbg(vhost, "Purging all requests\n"); 903 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 904 ibmvfc_fail_request(evt, error_code); 905 } 906 907 /** 908 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 909 * @vhost: struct ibmvfc host to reset 910 **/ 911 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 912 { 913 ibmvfc_purge_requests(vhost, DID_ERROR); 914 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 915 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 916 } 917 918 /** 919 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 920 * @vhost: struct ibmvfc host to reset 921 **/ 922 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 923 { 924 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 925 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 926 scsi_block_requests(vhost->host); 927 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 928 vhost->job_step = ibmvfc_npiv_logout; 929 wake_up(&vhost->work_wait_q); 930 } else 931 ibmvfc_hard_reset_host(vhost); 932 } 933 934 /** 935 * ibmvfc_reset_host - Reset the connection to the server 936 * @vhost: ibmvfc host struct 937 **/ 938 static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 939 { 940 unsigned long flags; 941 942 spin_lock_irqsave(vhost->host->host_lock, flags); 943 __ibmvfc_reset_host(vhost); 944 spin_unlock_irqrestore(vhost->host->host_lock, flags); 945 } 946 947 /** 948 * ibmvfc_retry_host_init - Retry host initialization if allowed 949 * @vhost: ibmvfc host struct 950 * 951 * Returns: 1 if init will be retried / 0 if not 952 * 953 **/ 954 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 955 { 956 int retry = 0; 957 958 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 959 vhost->delay_init = 1; 960 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 961 dev_err(vhost->dev, 962 "Host initialization retries exceeded. Taking adapter offline\n"); 963 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 964 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 965 __ibmvfc_reset_host(vhost); 966 else { 967 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 968 retry = 1; 969 } 970 } 971 972 wake_up(&vhost->work_wait_q); 973 return retry; 974 } 975 976 /** 977 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 978 * @starget: scsi target struct 979 * 980 * Return value: 981 * ibmvfc_target struct / NULL if not found 982 **/ 983 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 984 { 985 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 986 struct ibmvfc_host *vhost = shost_priv(shost); 987 struct ibmvfc_target *tgt; 988 989 list_for_each_entry(tgt, &vhost->targets, queue) 990 if (tgt->target_id == starget->id) { 991 kref_get(&tgt->kref); 992 return tgt; 993 } 994 return NULL; 995 } 996 997 /** 998 * ibmvfc_get_target - Find the specified scsi_target 999 * @starget: scsi target struct 1000 * 1001 * Return value: 1002 * ibmvfc_target struct / NULL if not found 1003 **/ 1004 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 1005 { 1006 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 1007 struct ibmvfc_target *tgt; 1008 unsigned long flags; 1009 1010 spin_lock_irqsave(shost->host_lock, flags); 1011 tgt = __ibmvfc_get_target(starget); 1012 spin_unlock_irqrestore(shost->host_lock, flags); 1013 return tgt; 1014 } 1015 1016 /** 1017 * ibmvfc_get_host_speed - Get host port speed 1018 * @shost: scsi host struct 1019 * 1020 * Return value: 1021 * none 1022 **/ 1023 static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 1024 { 1025 struct ibmvfc_host *vhost = shost_priv(shost); 1026 unsigned long flags; 1027 1028 spin_lock_irqsave(shost->host_lock, flags); 1029 if (vhost->state == IBMVFC_ACTIVE) { 1030 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) { 1031 case 1: 1032 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 1033 break; 1034 case 2: 1035 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 1036 break; 1037 case 4: 1038 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 1039 break; 1040 case 8: 1041 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 1042 break; 1043 case 10: 1044 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 1045 break; 1046 case 16: 1047 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 1048 break; 1049 default: 1050 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 1051 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100); 1052 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 1053 break; 1054 } 1055 } else 1056 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 1057 spin_unlock_irqrestore(shost->host_lock, flags); 1058 } 1059 1060 /** 1061 * ibmvfc_get_host_port_state - Get host port state 1062 * @shost: scsi host struct 1063 * 1064 * Return value: 1065 * none 1066 **/ 1067 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 1068 { 1069 struct ibmvfc_host *vhost = shost_priv(shost); 1070 unsigned long flags; 1071 1072 spin_lock_irqsave(shost->host_lock, flags); 1073 switch (vhost->state) { 1074 case IBMVFC_INITIALIZING: 1075 case IBMVFC_ACTIVE: 1076 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 1077 break; 1078 case IBMVFC_LINK_DOWN: 1079 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 1080 break; 1081 case IBMVFC_LINK_DEAD: 1082 case IBMVFC_HOST_OFFLINE: 1083 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1084 break; 1085 case IBMVFC_HALTED: 1086 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1087 break; 1088 case IBMVFC_NO_CRQ: 1089 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1090 break; 1091 default: 1092 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1093 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1094 break; 1095 } 1096 spin_unlock_irqrestore(shost->host_lock, flags); 1097 } 1098 1099 /** 1100 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1101 * @rport: rport struct 1102 * @timeout: timeout value 1103 * 1104 * Return value: 1105 * none 1106 **/ 1107 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1108 { 1109 if (timeout) 1110 rport->dev_loss_tmo = timeout; 1111 else 1112 rport->dev_loss_tmo = 1; 1113 } 1114 1115 /** 1116 * ibmvfc_release_tgt - Free memory allocated for a target 1117 * @kref: kref struct 1118 * 1119 **/ 1120 static void ibmvfc_release_tgt(struct kref *kref) 1121 { 1122 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1123 kfree(tgt); 1124 } 1125 1126 /** 1127 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1128 * @starget: scsi target struct 1129 * 1130 * Return value: 1131 * none 1132 **/ 1133 static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1134 { 1135 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1136 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1137 if (tgt) 1138 kref_put(&tgt->kref, ibmvfc_release_tgt); 1139 } 1140 1141 /** 1142 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1143 * @starget: scsi target struct 1144 * 1145 * Return value: 1146 * none 1147 **/ 1148 static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1149 { 1150 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1151 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1152 if (tgt) 1153 kref_put(&tgt->kref, ibmvfc_release_tgt); 1154 } 1155 1156 /** 1157 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1158 * @starget: scsi target struct 1159 * 1160 * Return value: 1161 * none 1162 **/ 1163 static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1164 { 1165 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1166 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1167 if (tgt) 1168 kref_put(&tgt->kref, ibmvfc_release_tgt); 1169 } 1170 1171 /** 1172 * ibmvfc_wait_while_resetting - Wait while the host resets 1173 * @vhost: ibmvfc host struct 1174 * 1175 * Return value: 1176 * 0 on success / other on failure 1177 **/ 1178 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1179 { 1180 long timeout = wait_event_timeout(vhost->init_wait_q, 1181 ((vhost->state == IBMVFC_ACTIVE || 1182 vhost->state == IBMVFC_HOST_OFFLINE || 1183 vhost->state == IBMVFC_LINK_DEAD) && 1184 vhost->action == IBMVFC_HOST_ACTION_NONE), 1185 (init_timeout * HZ)); 1186 1187 return timeout ? 0 : -EIO; 1188 } 1189 1190 /** 1191 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1192 * @shost: scsi host struct 1193 * 1194 * Return value: 1195 * 0 on success / other on failure 1196 **/ 1197 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1198 { 1199 struct ibmvfc_host *vhost = shost_priv(shost); 1200 1201 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1202 ibmvfc_reset_host(vhost); 1203 return ibmvfc_wait_while_resetting(vhost); 1204 } 1205 1206 /** 1207 * ibmvfc_gather_partition_info - Gather info about the LPAR 1208 * 1209 * Return value: 1210 * none 1211 **/ 1212 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1213 { 1214 struct device_node *rootdn; 1215 const char *name; 1216 const unsigned int *num; 1217 1218 rootdn = of_find_node_by_path("/"); 1219 if (!rootdn) 1220 return; 1221 1222 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1223 if (name) 1224 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1225 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1226 if (num) 1227 vhost->partition_number = *num; 1228 of_node_put(rootdn); 1229 } 1230 1231 /** 1232 * ibmvfc_set_login_info - Setup info for NPIV login 1233 * @vhost: ibmvfc host struct 1234 * 1235 * Return value: 1236 * none 1237 **/ 1238 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1239 { 1240 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1241 struct device_node *of_node = vhost->dev->of_node; 1242 const char *location; 1243 1244 memset(login_info, 0, sizeof(*login_info)); 1245 1246 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX); 1247 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); 1248 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); 1249 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); 1250 login_info->partition_num = cpu_to_be32(vhost->partition_number); 1251 login_info->vfc_frame_version = cpu_to_be32(1); 1252 login_info->fcp_version = cpu_to_be16(3); 1253 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); 1254 if (vhost->client_migrated) 1255 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); 1256 1257 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ); 1258 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE | IBMVFC_CAN_SEND_VF_WWPN); 1259 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); 1260 login_info->async.len = cpu_to_be32(vhost->async_crq.size * sizeof(*vhost->async_crq.msgs)); 1261 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1262 strncpy(login_info->device_name, 1263 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1264 1265 location = of_get_property(of_node, "ibm,loc-code", NULL); 1266 location = location ? location : dev_name(vhost->dev); 1267 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1268 } 1269 1270 /** 1271 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1272 * @vhost: ibmvfc host who owns the event pool 1273 * 1274 * Returns zero on success. 1275 **/ 1276 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1277 { 1278 int i; 1279 struct ibmvfc_event_pool *pool = &vhost->pool; 1280 1281 ENTER; 1282 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1283 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1284 if (!pool->events) 1285 return -ENOMEM; 1286 1287 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1288 pool->size * sizeof(*pool->iu_storage), 1289 &pool->iu_token, 0); 1290 1291 if (!pool->iu_storage) { 1292 kfree(pool->events); 1293 return -ENOMEM; 1294 } 1295 1296 for (i = 0; i < pool->size; ++i) { 1297 struct ibmvfc_event *evt = &pool->events[i]; 1298 atomic_set(&evt->free, 1); 1299 evt->crq.valid = 0x80; 1300 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i)); 1301 evt->xfer_iu = pool->iu_storage + i; 1302 evt->vhost = vhost; 1303 evt->ext_list = NULL; 1304 list_add_tail(&evt->queue, &vhost->free); 1305 } 1306 1307 LEAVE; 1308 return 0; 1309 } 1310 1311 /** 1312 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1313 * @vhost: ibmvfc host who owns the event pool 1314 * 1315 **/ 1316 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1317 { 1318 int i; 1319 struct ibmvfc_event_pool *pool = &vhost->pool; 1320 1321 ENTER; 1322 for (i = 0; i < pool->size; ++i) { 1323 list_del(&pool->events[i].queue); 1324 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1325 if (pool->events[i].ext_list) 1326 dma_pool_free(vhost->sg_pool, 1327 pool->events[i].ext_list, 1328 pool->events[i].ext_list_token); 1329 } 1330 1331 kfree(pool->events); 1332 dma_free_coherent(vhost->dev, 1333 pool->size * sizeof(*pool->iu_storage), 1334 pool->iu_storage, pool->iu_token); 1335 LEAVE; 1336 } 1337 1338 /** 1339 * ibmvfc_get_event - Gets the next free event in pool 1340 * @vhost: ibmvfc host struct 1341 * 1342 * Returns a free event from the pool. 1343 **/ 1344 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1345 { 1346 struct ibmvfc_event *evt; 1347 1348 BUG_ON(list_empty(&vhost->free)); 1349 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1350 atomic_set(&evt->free, 0); 1351 list_del(&evt->queue); 1352 return evt; 1353 } 1354 1355 /** 1356 * ibmvfc_init_event - Initialize fields in an event struct that are always 1357 * required. 1358 * @evt: The event 1359 * @done: Routine to call when the event is responded to 1360 * @format: SRP or MAD format 1361 **/ 1362 static void ibmvfc_init_event(struct ibmvfc_event *evt, 1363 void (*done) (struct ibmvfc_event *), u8 format) 1364 { 1365 evt->cmnd = NULL; 1366 evt->sync_iu = NULL; 1367 evt->crq.format = format; 1368 evt->done = done; 1369 evt->eh_comp = NULL; 1370 } 1371 1372 /** 1373 * ibmvfc_map_sg_list - Initialize scatterlist 1374 * @scmd: scsi command struct 1375 * @nseg: number of scatterlist segments 1376 * @md: memory descriptor list to initialize 1377 **/ 1378 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1379 struct srp_direct_buf *md) 1380 { 1381 int i; 1382 struct scatterlist *sg; 1383 1384 scsi_for_each_sg(scmd, sg, nseg, i) { 1385 md[i].va = cpu_to_be64(sg_dma_address(sg)); 1386 md[i].len = cpu_to_be32(sg_dma_len(sg)); 1387 md[i].key = 0; 1388 } 1389 } 1390 1391 /** 1392 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes descriptor fields 1393 * @scmd: struct scsi_cmnd with the scatterlist 1394 * @evt: ibmvfc event struct 1395 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1396 * @dev: device for which to map dma memory 1397 * 1398 * Returns: 1399 * 0 on success / non-zero on failure 1400 **/ 1401 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1402 struct ibmvfc_event *evt, 1403 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1404 { 1405 1406 int sg_mapped; 1407 struct srp_direct_buf *data = &vfc_cmd->ioba; 1408 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1409 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(evt->vhost, vfc_cmd); 1410 1411 if (cls3_error) 1412 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR); 1413 1414 sg_mapped = scsi_dma_map(scmd); 1415 if (!sg_mapped) { 1416 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC); 1417 return 0; 1418 } else if (unlikely(sg_mapped < 0)) { 1419 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1420 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1421 return sg_mapped; 1422 } 1423 1424 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1425 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE); 1426 iu->add_cdb_len |= IBMVFC_WRDATA; 1427 } else { 1428 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ); 1429 iu->add_cdb_len |= IBMVFC_RDDATA; 1430 } 1431 1432 if (sg_mapped == 1) { 1433 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1434 return 0; 1435 } 1436 1437 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST); 1438 1439 if (!evt->ext_list) { 1440 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1441 &evt->ext_list_token); 1442 1443 if (!evt->ext_list) { 1444 scsi_dma_unmap(scmd); 1445 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1446 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1447 return -ENOMEM; 1448 } 1449 } 1450 1451 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1452 1453 data->va = cpu_to_be64(evt->ext_list_token); 1454 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf)); 1455 data->key = 0; 1456 return 0; 1457 } 1458 1459 /** 1460 * ibmvfc_timeout - Internal command timeout handler 1461 * @evt: struct ibmvfc_event that timed out 1462 * 1463 * Called when an internally generated command times out 1464 **/ 1465 static void ibmvfc_timeout(struct timer_list *t) 1466 { 1467 struct ibmvfc_event *evt = from_timer(evt, t, timer); 1468 struct ibmvfc_host *vhost = evt->vhost; 1469 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1470 ibmvfc_reset_host(vhost); 1471 } 1472 1473 /** 1474 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1475 * @evt: event to be sent 1476 * @vhost: ibmvfc host struct 1477 * @timeout: timeout in seconds - 0 means do not time command 1478 * 1479 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1480 **/ 1481 static int ibmvfc_send_event(struct ibmvfc_event *evt, 1482 struct ibmvfc_host *vhost, unsigned long timeout) 1483 { 1484 __be64 *crq_as_u64 = (__be64 *) &evt->crq; 1485 int rc; 1486 1487 /* Copy the IU into the transfer area */ 1488 *evt->xfer_iu = evt->iu; 1489 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1490 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); 1491 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1492 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); 1493 else 1494 BUG(); 1495 1496 list_add_tail(&evt->queue, &vhost->sent); 1497 timer_setup(&evt->timer, ibmvfc_timeout, 0); 1498 1499 if (timeout) { 1500 evt->timer.expires = jiffies + (timeout * HZ); 1501 add_timer(&evt->timer); 1502 } 1503 1504 mb(); 1505 1506 if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), 1507 be64_to_cpu(crq_as_u64[1])))) { 1508 list_del(&evt->queue); 1509 del_timer(&evt->timer); 1510 1511 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1512 * Firmware will send a CRQ with a transport event (0xFF) to 1513 * tell this client what has happened to the transport. This 1514 * will be handled in ibmvfc_handle_crq() 1515 */ 1516 if (rc == H_CLOSED) { 1517 if (printk_ratelimit()) 1518 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1519 if (evt->cmnd) 1520 scsi_dma_unmap(evt->cmnd); 1521 ibmvfc_free_event(evt); 1522 return SCSI_MLQUEUE_HOST_BUSY; 1523 } 1524 1525 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1526 if (evt->cmnd) { 1527 evt->cmnd->result = DID_ERROR << 16; 1528 evt->done = ibmvfc_scsi_eh_done; 1529 } else 1530 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); 1531 1532 evt->done(evt); 1533 } else 1534 ibmvfc_trc_start(evt); 1535 1536 return 0; 1537 } 1538 1539 /** 1540 * ibmvfc_log_error - Log an error for the failed command if appropriate 1541 * @evt: ibmvfc event to log 1542 * 1543 **/ 1544 static void ibmvfc_log_error(struct ibmvfc_event *evt) 1545 { 1546 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1547 struct ibmvfc_host *vhost = evt->vhost; 1548 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 1549 struct scsi_cmnd *cmnd = evt->cmnd; 1550 const char *err = unknown_error; 1551 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 1552 int logerr = 0; 1553 int rsp_code = 0; 1554 1555 if (index >= 0) { 1556 logerr = cmd_status[index].log; 1557 err = cmd_status[index].name; 1558 } 1559 1560 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1561 return; 1562 1563 if (rsp->flags & FCP_RSP_LEN_VALID) 1564 rsp_code = rsp->data.info.rsp_code; 1565 1566 scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) " 1567 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1568 cmnd->cmnd[0], err, be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error), 1569 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1570 } 1571 1572 /** 1573 * ibmvfc_relogin - Log back into the specified device 1574 * @sdev: scsi device struct 1575 * 1576 **/ 1577 static void ibmvfc_relogin(struct scsi_device *sdev) 1578 { 1579 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1580 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1581 struct ibmvfc_target *tgt; 1582 1583 list_for_each_entry(tgt, &vhost->targets, queue) { 1584 if (rport == tgt->rport) { 1585 ibmvfc_del_tgt(tgt); 1586 break; 1587 } 1588 } 1589 1590 ibmvfc_reinit_host(vhost); 1591 } 1592 1593 /** 1594 * ibmvfc_scsi_done - Handle responses from commands 1595 * @evt: ibmvfc event to be handled 1596 * 1597 * Used as a callback when sending scsi cmds. 1598 **/ 1599 static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1600 { 1601 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1602 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(evt->vhost, vfc_cmd); 1603 struct scsi_cmnd *cmnd = evt->cmnd; 1604 u32 rsp_len = 0; 1605 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); 1606 1607 if (cmnd) { 1608 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) 1609 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); 1610 else if (rsp->flags & FCP_RESID_UNDER) 1611 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); 1612 else 1613 scsi_set_resid(cmnd, 0); 1614 1615 if (vfc_cmd->status) { 1616 cmnd->result = ibmvfc_get_err_result(evt->vhost, vfc_cmd); 1617 1618 if (rsp->flags & FCP_RSP_LEN_VALID) 1619 rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 1620 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1621 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1622 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1623 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1624 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && 1625 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) 1626 ibmvfc_relogin(cmnd->device); 1627 1628 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1629 cmnd->result = (DID_ERROR << 16); 1630 1631 ibmvfc_log_error(evt); 1632 } 1633 1634 if (!cmnd->result && 1635 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1636 cmnd->result = (DID_ERROR << 16); 1637 1638 scsi_dma_unmap(cmnd); 1639 cmnd->scsi_done(cmnd); 1640 } 1641 1642 if (evt->eh_comp) 1643 complete(evt->eh_comp); 1644 1645 ibmvfc_free_event(evt); 1646 } 1647 1648 /** 1649 * ibmvfc_host_chkready - Check if the host can accept commands 1650 * @vhost: struct ibmvfc host 1651 * 1652 * Returns: 1653 * 1 if host can accept command / 0 if not 1654 **/ 1655 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1656 { 1657 int result = 0; 1658 1659 switch (vhost->state) { 1660 case IBMVFC_LINK_DEAD: 1661 case IBMVFC_HOST_OFFLINE: 1662 result = DID_NO_CONNECT << 16; 1663 break; 1664 case IBMVFC_NO_CRQ: 1665 case IBMVFC_INITIALIZING: 1666 case IBMVFC_HALTED: 1667 case IBMVFC_LINK_DOWN: 1668 result = DID_REQUEUE << 16; 1669 break; 1670 case IBMVFC_ACTIVE: 1671 result = 0; 1672 break; 1673 } 1674 1675 return result; 1676 } 1677 1678 static struct ibmvfc_cmd *ibmvfc_init_vfc_cmd(struct ibmvfc_event *evt, struct scsi_device *sdev) 1679 { 1680 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1681 struct ibmvfc_host *vhost = evt->vhost; 1682 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 1683 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 1684 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 1685 size_t offset; 1686 1687 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1688 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 1689 offset = offsetof(struct ibmvfc_cmd, v2.rsp); 1690 vfc_cmd->target_wwpn = cpu_to_be64(rport->port_name); 1691 } else 1692 offset = offsetof(struct ibmvfc_cmd, v1.rsp); 1693 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offset); 1694 vfc_cmd->resp.len = cpu_to_be32(sizeof(*rsp)); 1695 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1696 vfc_cmd->payload_len = cpu_to_be32(sizeof(*iu)); 1697 vfc_cmd->resp_len = cpu_to_be32(sizeof(*rsp)); 1698 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 1699 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); 1700 int_to_scsilun(sdev->lun, &iu->lun); 1701 1702 return vfc_cmd; 1703 } 1704 1705 /** 1706 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1707 * @cmnd: struct scsi_cmnd to be executed 1708 * @done: Callback function to be called when cmnd is completed 1709 * 1710 * Returns: 1711 * 0 on success / other on failure 1712 **/ 1713 static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd, 1714 void (*done) (struct scsi_cmnd *)) 1715 { 1716 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1717 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1718 struct ibmvfc_cmd *vfc_cmd; 1719 struct ibmvfc_fcp_cmd_iu *iu; 1720 struct ibmvfc_event *evt; 1721 int rc; 1722 1723 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1724 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1725 cmnd->result = rc; 1726 done(cmnd); 1727 return 0; 1728 } 1729 1730 cmnd->result = (DID_OK << 16); 1731 evt = ibmvfc_get_event(vhost); 1732 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1733 evt->cmnd = cmnd; 1734 cmnd->scsi_done = done; 1735 1736 vfc_cmd = ibmvfc_init_vfc_cmd(evt, cmnd->device); 1737 iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 1738 1739 iu->xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); 1740 memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); 1741 1742 if (cmnd->flags & SCMD_TAGGED) { 1743 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag); 1744 iu->pri_task_attr = IBMVFC_SIMPLE_TASK; 1745 } 1746 1747 vfc_cmd->correlation = cpu_to_be64((u64)evt); 1748 1749 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1750 return ibmvfc_send_event(evt, vhost, 0); 1751 1752 ibmvfc_free_event(evt); 1753 if (rc == -ENOMEM) 1754 return SCSI_MLQUEUE_HOST_BUSY; 1755 1756 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1757 scmd_printk(KERN_ERR, cmnd, 1758 "Failed to map DMA buffer for command. rc=%d\n", rc); 1759 1760 cmnd->result = DID_ERROR << 16; 1761 done(cmnd); 1762 return 0; 1763 } 1764 1765 static DEF_SCSI_QCMD(ibmvfc_queuecommand) 1766 1767 /** 1768 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1769 * @evt: ibmvfc event struct 1770 * 1771 **/ 1772 static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1773 { 1774 /* copy the response back */ 1775 if (evt->sync_iu) 1776 *evt->sync_iu = *evt->xfer_iu; 1777 1778 complete(&evt->comp); 1779 } 1780 1781 /** 1782 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 1783 * @evt: struct ibmvfc_event 1784 * 1785 **/ 1786 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 1787 { 1788 struct ibmvfc_host *vhost = evt->vhost; 1789 1790 ibmvfc_free_event(evt); 1791 vhost->aborting_passthru = 0; 1792 dev_info(vhost->dev, "Passthru command cancelled\n"); 1793 } 1794 1795 /** 1796 * ibmvfc_bsg_timeout - Handle a BSG timeout 1797 * @job: struct bsg_job that timed out 1798 * 1799 * Returns: 1800 * 0 on success / other on failure 1801 **/ 1802 static int ibmvfc_bsg_timeout(struct bsg_job *job) 1803 { 1804 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 1805 unsigned long port_id = (unsigned long)job->dd_data; 1806 struct ibmvfc_event *evt; 1807 struct ibmvfc_tmf *tmf; 1808 unsigned long flags; 1809 int rc; 1810 1811 ENTER; 1812 spin_lock_irqsave(vhost->host->host_lock, flags); 1813 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 1814 __ibmvfc_reset_host(vhost); 1815 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1816 return 0; 1817 } 1818 1819 vhost->aborting_passthru = 1; 1820 evt = ibmvfc_get_event(vhost); 1821 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 1822 1823 tmf = &evt->iu.tmf; 1824 memset(tmf, 0, sizeof(*tmf)); 1825 tmf->common.version = cpu_to_be32(1); 1826 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 1827 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 1828 tmf->scsi_id = cpu_to_be64(port_id); 1829 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 1830 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); 1831 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1832 1833 if (rc != 0) { 1834 vhost->aborting_passthru = 0; 1835 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 1836 rc = -EIO; 1837 } else 1838 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 1839 port_id); 1840 1841 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1842 1843 LEAVE; 1844 return rc; 1845 } 1846 1847 /** 1848 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 1849 * @vhost: struct ibmvfc_host to send command 1850 * @port_id: port ID to send command 1851 * 1852 * Returns: 1853 * 0 on success / other on failure 1854 **/ 1855 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 1856 { 1857 struct ibmvfc_port_login *plogi; 1858 struct ibmvfc_target *tgt; 1859 struct ibmvfc_event *evt; 1860 union ibmvfc_iu rsp_iu; 1861 unsigned long flags; 1862 int rc = 0, issue_login = 1; 1863 1864 ENTER; 1865 spin_lock_irqsave(vhost->host->host_lock, flags); 1866 list_for_each_entry(tgt, &vhost->targets, queue) { 1867 if (tgt->scsi_id == port_id) { 1868 issue_login = 0; 1869 break; 1870 } 1871 } 1872 1873 if (!issue_login) 1874 goto unlock_out; 1875 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 1876 goto unlock_out; 1877 1878 evt = ibmvfc_get_event(vhost); 1879 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1880 plogi = &evt->iu.plogi; 1881 memset(plogi, 0, sizeof(*plogi)); 1882 plogi->common.version = cpu_to_be32(1); 1883 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 1884 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 1885 plogi->scsi_id = cpu_to_be64(port_id); 1886 evt->sync_iu = &rsp_iu; 1887 init_completion(&evt->comp); 1888 1889 rc = ibmvfc_send_event(evt, vhost, default_timeout); 1890 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1891 1892 if (rc) 1893 return -EIO; 1894 1895 wait_for_completion(&evt->comp); 1896 1897 if (rsp_iu.plogi.common.status) 1898 rc = -EIO; 1899 1900 spin_lock_irqsave(vhost->host->host_lock, flags); 1901 ibmvfc_free_event(evt); 1902 unlock_out: 1903 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1904 LEAVE; 1905 return rc; 1906 } 1907 1908 /** 1909 * ibmvfc_bsg_request - Handle a BSG request 1910 * @job: struct bsg_job to be executed 1911 * 1912 * Returns: 1913 * 0 on success / other on failure 1914 **/ 1915 static int ibmvfc_bsg_request(struct bsg_job *job) 1916 { 1917 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 1918 struct fc_rport *rport = fc_bsg_to_rport(job); 1919 struct ibmvfc_passthru_mad *mad; 1920 struct ibmvfc_event *evt; 1921 union ibmvfc_iu rsp_iu; 1922 unsigned long flags, port_id = -1; 1923 struct fc_bsg_request *bsg_request = job->request; 1924 struct fc_bsg_reply *bsg_reply = job->reply; 1925 unsigned int code = bsg_request->msgcode; 1926 int rc = 0, req_seg, rsp_seg, issue_login = 0; 1927 u32 fc_flags, rsp_len; 1928 1929 ENTER; 1930 bsg_reply->reply_payload_rcv_len = 0; 1931 if (rport) 1932 port_id = rport->port_id; 1933 1934 switch (code) { 1935 case FC_BSG_HST_ELS_NOLOGIN: 1936 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) | 1937 (bsg_request->rqst_data.h_els.port_id[1] << 8) | 1938 bsg_request->rqst_data.h_els.port_id[2]; 1939 fallthrough; 1940 case FC_BSG_RPT_ELS: 1941 fc_flags = IBMVFC_FC_ELS; 1942 break; 1943 case FC_BSG_HST_CT: 1944 issue_login = 1; 1945 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) | 1946 (bsg_request->rqst_data.h_ct.port_id[1] << 8) | 1947 bsg_request->rqst_data.h_ct.port_id[2]; 1948 fallthrough; 1949 case FC_BSG_RPT_CT: 1950 fc_flags = IBMVFC_FC_CT_IU; 1951 break; 1952 default: 1953 return -ENOTSUPP; 1954 } 1955 1956 if (port_id == -1) 1957 return -EINVAL; 1958 if (!mutex_trylock(&vhost->passthru_mutex)) 1959 return -EBUSY; 1960 1961 job->dd_data = (void *)port_id; 1962 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 1963 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1964 1965 if (!req_seg) { 1966 mutex_unlock(&vhost->passthru_mutex); 1967 return -ENOMEM; 1968 } 1969 1970 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 1971 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 1972 1973 if (!rsp_seg) { 1974 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 1975 job->request_payload.sg_cnt, DMA_TO_DEVICE); 1976 mutex_unlock(&vhost->passthru_mutex); 1977 return -ENOMEM; 1978 } 1979 1980 if (req_seg > 1 || rsp_seg > 1) { 1981 rc = -EINVAL; 1982 goto out; 1983 } 1984 1985 if (issue_login) 1986 rc = ibmvfc_bsg_plogi(vhost, port_id); 1987 1988 spin_lock_irqsave(vhost->host->host_lock, flags); 1989 1990 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 1991 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1992 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1993 goto out; 1994 } 1995 1996 evt = ibmvfc_get_event(vhost); 1997 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1998 mad = &evt->iu.passthru; 1999 2000 memset(mad, 0, sizeof(*mad)); 2001 mad->common.version = cpu_to_be32(1); 2002 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 2003 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 2004 2005 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + 2006 offsetof(struct ibmvfc_passthru_mad, iu)); 2007 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 2008 2009 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); 2010 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); 2011 mad->iu.flags = cpu_to_be32(fc_flags); 2012 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 2013 2014 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); 2015 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); 2016 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); 2017 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); 2018 mad->iu.scsi_id = cpu_to_be64(port_id); 2019 mad->iu.tag = cpu_to_be64((u64)evt); 2020 rsp_len = be32_to_cpu(mad->iu.rsp.len); 2021 2022 evt->sync_iu = &rsp_iu; 2023 init_completion(&evt->comp); 2024 rc = ibmvfc_send_event(evt, vhost, 0); 2025 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2026 2027 if (rc) { 2028 rc = -EIO; 2029 goto out; 2030 } 2031 2032 wait_for_completion(&evt->comp); 2033 2034 if (rsp_iu.passthru.common.status) 2035 rc = -EIO; 2036 else 2037 bsg_reply->reply_payload_rcv_len = rsp_len; 2038 2039 spin_lock_irqsave(vhost->host->host_lock, flags); 2040 ibmvfc_free_event(evt); 2041 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2042 bsg_reply->result = rc; 2043 bsg_job_done(job, bsg_reply->result, 2044 bsg_reply->reply_payload_rcv_len); 2045 rc = 0; 2046 out: 2047 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 2048 job->request_payload.sg_cnt, DMA_TO_DEVICE); 2049 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 2050 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 2051 mutex_unlock(&vhost->passthru_mutex); 2052 LEAVE; 2053 return rc; 2054 } 2055 2056 /** 2057 * ibmvfc_reset_device - Reset the device with the specified reset type 2058 * @sdev: scsi device to reset 2059 * @type: reset type 2060 * @desc: reset type description for log messages 2061 * 2062 * Returns: 2063 * 0 on success / other on failure 2064 **/ 2065 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 2066 { 2067 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2068 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2069 struct ibmvfc_cmd *tmf; 2070 struct ibmvfc_event *evt = NULL; 2071 union ibmvfc_iu rsp_iu; 2072 struct ibmvfc_fcp_cmd_iu *iu; 2073 struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); 2074 int rsp_rc = -EBUSY; 2075 unsigned long flags; 2076 int rsp_code = 0; 2077 2078 spin_lock_irqsave(vhost->host->host_lock, flags); 2079 if (vhost->state == IBMVFC_ACTIVE) { 2080 evt = ibmvfc_get_event(vhost); 2081 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2082 tmf = ibmvfc_init_vfc_cmd(evt, sdev); 2083 iu = ibmvfc_get_fcp_iu(vhost, tmf); 2084 2085 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2086 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 2087 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2088 iu->tmf_flags = type; 2089 evt->sync_iu = &rsp_iu; 2090 2091 init_completion(&evt->comp); 2092 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2093 } 2094 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2095 2096 if (rsp_rc != 0) { 2097 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 2098 desc, rsp_rc); 2099 return -EIO; 2100 } 2101 2102 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2103 wait_for_completion(&evt->comp); 2104 2105 if (rsp_iu.cmd.status) 2106 rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); 2107 2108 if (rsp_code) { 2109 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2110 rsp_code = fc_rsp->data.info.rsp_code; 2111 2112 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2113 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, 2114 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2115 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, 2116 fc_rsp->scsi_status); 2117 rsp_rc = -EIO; 2118 } else 2119 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2120 2121 spin_lock_irqsave(vhost->host->host_lock, flags); 2122 ibmvfc_free_event(evt); 2123 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2124 return rsp_rc; 2125 } 2126 2127 /** 2128 * ibmvfc_match_rport - Match function for specified remote port 2129 * @evt: ibmvfc event struct 2130 * @device: device to match (rport) 2131 * 2132 * Returns: 2133 * 1 if event matches rport / 0 if event does not match rport 2134 **/ 2135 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2136 { 2137 struct fc_rport *cmd_rport; 2138 2139 if (evt->cmnd) { 2140 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2141 if (cmd_rport == rport) 2142 return 1; 2143 } 2144 return 0; 2145 } 2146 2147 /** 2148 * ibmvfc_match_target - Match function for specified target 2149 * @evt: ibmvfc event struct 2150 * @device: device to match (starget) 2151 * 2152 * Returns: 2153 * 1 if event matches starget / 0 if event does not match starget 2154 **/ 2155 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2156 { 2157 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2158 return 1; 2159 return 0; 2160 } 2161 2162 /** 2163 * ibmvfc_match_lun - Match function for specified LUN 2164 * @evt: ibmvfc event struct 2165 * @device: device to match (sdev) 2166 * 2167 * Returns: 2168 * 1 if event matches sdev / 0 if event does not match sdev 2169 **/ 2170 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2171 { 2172 if (evt->cmnd && evt->cmnd->device == device) 2173 return 1; 2174 return 0; 2175 } 2176 2177 /** 2178 * ibmvfc_wait_for_ops - Wait for ops to complete 2179 * @vhost: ibmvfc host struct 2180 * @device: device to match (starget or sdev) 2181 * @match: match function 2182 * 2183 * Returns: 2184 * SUCCESS / FAILED 2185 **/ 2186 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2187 int (*match) (struct ibmvfc_event *, void *)) 2188 { 2189 struct ibmvfc_event *evt; 2190 DECLARE_COMPLETION_ONSTACK(comp); 2191 int wait; 2192 unsigned long flags; 2193 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2194 2195 ENTER; 2196 do { 2197 wait = 0; 2198 spin_lock_irqsave(vhost->host->host_lock, flags); 2199 list_for_each_entry(evt, &vhost->sent, queue) { 2200 if (match(evt, device)) { 2201 evt->eh_comp = ∁ 2202 wait++; 2203 } 2204 } 2205 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2206 2207 if (wait) { 2208 timeout = wait_for_completion_timeout(&comp, timeout); 2209 2210 if (!timeout) { 2211 wait = 0; 2212 spin_lock_irqsave(vhost->host->host_lock, flags); 2213 list_for_each_entry(evt, &vhost->sent, queue) { 2214 if (match(evt, device)) { 2215 evt->eh_comp = NULL; 2216 wait++; 2217 } 2218 } 2219 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2220 if (wait) 2221 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2222 LEAVE; 2223 return wait ? FAILED : SUCCESS; 2224 } 2225 } 2226 } while (wait); 2227 2228 LEAVE; 2229 return SUCCESS; 2230 } 2231 2232 /** 2233 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2234 * @sdev: scsi device to cancel commands 2235 * @type: type of error recovery being performed 2236 * 2237 * This sends a cancel to the VIOS for the specified device. This does 2238 * NOT send any abort to the actual device. That must be done separately. 2239 * 2240 * Returns: 2241 * 0 on success / other on failure 2242 **/ 2243 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2244 { 2245 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2246 struct scsi_target *starget = scsi_target(sdev); 2247 struct fc_rport *rport = starget_to_rport(starget); 2248 struct ibmvfc_tmf *tmf; 2249 struct ibmvfc_event *evt, *found_evt; 2250 union ibmvfc_iu rsp; 2251 int rsp_rc = -EBUSY; 2252 unsigned long flags; 2253 u16 status; 2254 2255 ENTER; 2256 spin_lock_irqsave(vhost->host->host_lock, flags); 2257 found_evt = NULL; 2258 list_for_each_entry(evt, &vhost->sent, queue) { 2259 if (evt->cmnd && evt->cmnd->device == sdev) { 2260 found_evt = evt; 2261 break; 2262 } 2263 } 2264 2265 if (!found_evt) { 2266 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2267 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2268 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2269 return 0; 2270 } 2271 2272 if (vhost->logged_in) { 2273 evt = ibmvfc_get_event(vhost); 2274 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2275 2276 tmf = &evt->iu.tmf; 2277 memset(tmf, 0, sizeof(*tmf)); 2278 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 2279 tmf->common.version = cpu_to_be32(2); 2280 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2281 } else { 2282 tmf->common.version = cpu_to_be32(1); 2283 } 2284 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2285 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2286 tmf->scsi_id = cpu_to_be64(rport->port_id); 2287 int_to_scsilun(sdev->lun, &tmf->lun); 2288 if (!ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPRESS_ABTS)) 2289 type &= ~IBMVFC_TMF_SUPPRESS_ABTS; 2290 if (vhost->state == IBMVFC_ACTIVE) 2291 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); 2292 else 2293 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); 2294 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2295 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); 2296 2297 evt->sync_iu = &rsp; 2298 init_completion(&evt->comp); 2299 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2300 } 2301 2302 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2303 2304 if (rsp_rc != 0) { 2305 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2306 /* If failure is received, the host adapter is most likely going 2307 through reset, return success so the caller will wait for the command 2308 being cancelled to get returned */ 2309 return 0; 2310 } 2311 2312 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2313 2314 wait_for_completion(&evt->comp); 2315 status = be16_to_cpu(rsp.mad_common.status); 2316 spin_lock_irqsave(vhost->host->host_lock, flags); 2317 ibmvfc_free_event(evt); 2318 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2319 2320 if (status != IBMVFC_MAD_SUCCESS) { 2321 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2322 switch (status) { 2323 case IBMVFC_MAD_DRIVER_FAILED: 2324 case IBMVFC_MAD_CRQ_ERROR: 2325 /* Host adapter most likely going through reset, return success to 2326 the caller will wait for the command being cancelled to get returned */ 2327 return 0; 2328 default: 2329 return -EIO; 2330 }; 2331 } 2332 2333 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2334 return 0; 2335 } 2336 2337 /** 2338 * ibmvfc_match_key - Match function for specified cancel key 2339 * @evt: ibmvfc event struct 2340 * @key: cancel key to match 2341 * 2342 * Returns: 2343 * 1 if event matches key / 0 if event does not match key 2344 **/ 2345 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2346 { 2347 unsigned long cancel_key = (unsigned long)key; 2348 2349 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2350 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) 2351 return 1; 2352 return 0; 2353 } 2354 2355 /** 2356 * ibmvfc_match_evt - Match function for specified event 2357 * @evt: ibmvfc event struct 2358 * @match: event to match 2359 * 2360 * Returns: 2361 * 1 if event matches key / 0 if event does not match key 2362 **/ 2363 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) 2364 { 2365 if (evt == match) 2366 return 1; 2367 return 0; 2368 } 2369 2370 /** 2371 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2372 * @sdev: scsi device to abort commands 2373 * 2374 * This sends an Abort Task Set to the VIOS for the specified device. This does 2375 * NOT send any cancel to the VIOS. That must be done separately. 2376 * 2377 * Returns: 2378 * 0 on success / other on failure 2379 **/ 2380 static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2381 { 2382 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2383 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2384 struct ibmvfc_cmd *tmf; 2385 struct ibmvfc_event *evt, *found_evt; 2386 union ibmvfc_iu rsp_iu; 2387 struct ibmvfc_fcp_cmd_iu *iu; 2388 struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); 2389 int rc, rsp_rc = -EBUSY; 2390 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2391 int rsp_code = 0; 2392 2393 spin_lock_irqsave(vhost->host->host_lock, flags); 2394 found_evt = NULL; 2395 list_for_each_entry(evt, &vhost->sent, queue) { 2396 if (evt->cmnd && evt->cmnd->device == sdev) { 2397 found_evt = evt; 2398 break; 2399 } 2400 } 2401 2402 if (!found_evt) { 2403 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2404 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2405 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2406 return 0; 2407 } 2408 2409 if (vhost->state == IBMVFC_ACTIVE) { 2410 evt = ibmvfc_get_event(vhost); 2411 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2412 tmf = ibmvfc_init_vfc_cmd(evt, sdev); 2413 iu = ibmvfc_get_fcp_iu(vhost, tmf); 2414 2415 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 2416 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2417 iu->tmf_flags = IBMVFC_ABORT_TASK_SET; 2418 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2419 evt->sync_iu = &rsp_iu; 2420 2421 tmf->correlation = cpu_to_be64((u64)evt); 2422 2423 init_completion(&evt->comp); 2424 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2425 } 2426 2427 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2428 2429 if (rsp_rc != 0) { 2430 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2431 return -EIO; 2432 } 2433 2434 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2435 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2436 2437 if (!timeout) { 2438 rc = ibmvfc_cancel_all(sdev, 0); 2439 if (!rc) { 2440 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2441 if (rc == SUCCESS) 2442 rc = 0; 2443 } 2444 2445 if (rc) { 2446 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2447 ibmvfc_reset_host(vhost); 2448 rsp_rc = -EIO; 2449 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2450 2451 if (rc == SUCCESS) 2452 rsp_rc = 0; 2453 2454 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); 2455 if (rc != SUCCESS) { 2456 spin_lock_irqsave(vhost->host->host_lock, flags); 2457 ibmvfc_hard_reset_host(vhost); 2458 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2459 rsp_rc = 0; 2460 } 2461 2462 goto out; 2463 } 2464 } 2465 2466 if (rsp_iu.cmd.status) 2467 rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); 2468 2469 if (rsp_code) { 2470 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2471 rsp_code = fc_rsp->data.info.rsp_code; 2472 2473 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2474 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2475 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2476 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, 2477 fc_rsp->scsi_status); 2478 rsp_rc = -EIO; 2479 } else 2480 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2481 2482 out: 2483 spin_lock_irqsave(vhost->host->host_lock, flags); 2484 ibmvfc_free_event(evt); 2485 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2486 return rsp_rc; 2487 } 2488 2489 /** 2490 * ibmvfc_eh_abort_handler - Abort a command 2491 * @cmd: scsi command to abort 2492 * 2493 * Returns: 2494 * SUCCESS / FAST_IO_FAIL / FAILED 2495 **/ 2496 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2497 { 2498 struct scsi_device *sdev = cmd->device; 2499 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2500 int cancel_rc, block_rc; 2501 int rc = FAILED; 2502 2503 ENTER; 2504 block_rc = fc_block_scsi_eh(cmd); 2505 ibmvfc_wait_while_resetting(vhost); 2506 if (block_rc != FAST_IO_FAIL) { 2507 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2508 ibmvfc_abort_task_set(sdev); 2509 } else 2510 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2511 2512 if (!cancel_rc) 2513 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2514 2515 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2516 rc = FAST_IO_FAIL; 2517 2518 LEAVE; 2519 return rc; 2520 } 2521 2522 /** 2523 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2524 * @cmd: scsi command struct 2525 * 2526 * Returns: 2527 * SUCCESS / FAST_IO_FAIL / FAILED 2528 **/ 2529 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2530 { 2531 struct scsi_device *sdev = cmd->device; 2532 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2533 int cancel_rc, block_rc, reset_rc = 0; 2534 int rc = FAILED; 2535 2536 ENTER; 2537 block_rc = fc_block_scsi_eh(cmd); 2538 ibmvfc_wait_while_resetting(vhost); 2539 if (block_rc != FAST_IO_FAIL) { 2540 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2541 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2542 } else 2543 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2544 2545 if (!cancel_rc && !reset_rc) 2546 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2547 2548 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2549 rc = FAST_IO_FAIL; 2550 2551 LEAVE; 2552 return rc; 2553 } 2554 2555 /** 2556 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function 2557 * @sdev: scsi device struct 2558 * @data: return code 2559 * 2560 **/ 2561 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) 2562 { 2563 unsigned long *rc = data; 2564 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2565 } 2566 2567 /** 2568 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2569 * @sdev: scsi device struct 2570 * @data: return code 2571 * 2572 **/ 2573 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2574 { 2575 unsigned long *rc = data; 2576 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2577 } 2578 2579 /** 2580 * ibmvfc_eh_target_reset_handler - Reset the target 2581 * @cmd: scsi command struct 2582 * 2583 * Returns: 2584 * SUCCESS / FAST_IO_FAIL / FAILED 2585 **/ 2586 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2587 { 2588 struct scsi_device *sdev = cmd->device; 2589 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2590 struct scsi_target *starget = scsi_target(sdev); 2591 int block_rc; 2592 int reset_rc = 0; 2593 int rc = FAILED; 2594 unsigned long cancel_rc = 0; 2595 2596 ENTER; 2597 block_rc = fc_block_scsi_eh(cmd); 2598 ibmvfc_wait_while_resetting(vhost); 2599 if (block_rc != FAST_IO_FAIL) { 2600 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2601 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2602 } else 2603 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); 2604 2605 if (!cancel_rc && !reset_rc) 2606 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2607 2608 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2609 rc = FAST_IO_FAIL; 2610 2611 LEAVE; 2612 return rc; 2613 } 2614 2615 /** 2616 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2617 * @cmd: struct scsi_cmnd having problems 2618 * 2619 **/ 2620 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2621 { 2622 int rc; 2623 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2624 2625 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2626 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2627 2628 return rc ? FAILED : SUCCESS; 2629 } 2630 2631 /** 2632 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2633 * @rport: rport struct 2634 * 2635 * Return value: 2636 * none 2637 **/ 2638 static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2639 { 2640 struct Scsi_Host *shost = rport_to_shost(rport); 2641 struct ibmvfc_host *vhost = shost_priv(shost); 2642 struct fc_rport *dev_rport; 2643 struct scsi_device *sdev; 2644 struct ibmvfc_target *tgt; 2645 unsigned long rc, flags; 2646 unsigned int found; 2647 2648 ENTER; 2649 shost_for_each_device(sdev, shost) { 2650 dev_rport = starget_to_rport(scsi_target(sdev)); 2651 if (dev_rport != rport) 2652 continue; 2653 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2654 } 2655 2656 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 2657 2658 if (rc == FAILED) 2659 ibmvfc_issue_fc_host_lip(shost); 2660 2661 spin_lock_irqsave(shost->host_lock, flags); 2662 found = 0; 2663 list_for_each_entry(tgt, &vhost->targets, queue) { 2664 if (tgt->scsi_id == rport->port_id) { 2665 found++; 2666 break; 2667 } 2668 } 2669 2670 if (found && tgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 2671 /* 2672 * If we get here, that means we previously attempted to send 2673 * an implicit logout to the target but it failed, most likely 2674 * due to I/O being pending, so we need to send it again 2675 */ 2676 ibmvfc_del_tgt(tgt); 2677 ibmvfc_reinit_host(vhost); 2678 } 2679 2680 spin_unlock_irqrestore(shost->host_lock, flags); 2681 LEAVE; 2682 } 2683 2684 static const struct ibmvfc_async_desc ae_desc [] = { 2685 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2686 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2687 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2688 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2689 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 2690 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, 2691 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, 2692 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, 2693 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, 2694 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, 2695 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, 2696 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, 2697 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, 2698 }; 2699 2700 static const struct ibmvfc_async_desc unknown_ae = { 2701 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL 2702 }; 2703 2704 /** 2705 * ibmvfc_get_ae_desc - Get text description for async event 2706 * @ae: async event 2707 * 2708 **/ 2709 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 2710 { 2711 int i; 2712 2713 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2714 if (ae_desc[i].ae == ae) 2715 return &ae_desc[i]; 2716 2717 return &unknown_ae; 2718 } 2719 2720 static const struct { 2721 enum ibmvfc_ae_link_state state; 2722 const char *desc; 2723 } link_desc [] = { 2724 { IBMVFC_AE_LS_LINK_UP, " link up" }, 2725 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 2726 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 2727 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 2728 }; 2729 2730 /** 2731 * ibmvfc_get_link_state - Get text description for link state 2732 * @state: link state 2733 * 2734 **/ 2735 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 2736 { 2737 int i; 2738 2739 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 2740 if (link_desc[i].state == state) 2741 return link_desc[i].desc; 2742 2743 return ""; 2744 } 2745 2746 /** 2747 * ibmvfc_handle_async - Handle an async event from the adapter 2748 * @crq: crq to process 2749 * @vhost: ibmvfc host struct 2750 * 2751 **/ 2752 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2753 struct ibmvfc_host *vhost) 2754 { 2755 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); 2756 struct ibmvfc_target *tgt; 2757 2758 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 2759 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id), 2760 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name), 2761 ibmvfc_get_link_state(crq->link_state)); 2762 2763 switch (be64_to_cpu(crq->event)) { 2764 case IBMVFC_AE_RESUME: 2765 switch (crq->link_state) { 2766 case IBMVFC_AE_LS_LINK_DOWN: 2767 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2768 break; 2769 case IBMVFC_AE_LS_LINK_DEAD: 2770 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2771 break; 2772 case IBMVFC_AE_LS_LINK_UP: 2773 case IBMVFC_AE_LS_LINK_BOUNCED: 2774 default: 2775 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2776 vhost->delay_init = 1; 2777 __ibmvfc_reset_host(vhost); 2778 break; 2779 } 2780 2781 break; 2782 case IBMVFC_AE_LINK_UP: 2783 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2784 vhost->delay_init = 1; 2785 __ibmvfc_reset_host(vhost); 2786 break; 2787 case IBMVFC_AE_SCN_FABRIC: 2788 case IBMVFC_AE_SCN_DOMAIN: 2789 vhost->events_to_log |= IBMVFC_AE_RSCN; 2790 if (vhost->state < IBMVFC_HALTED) { 2791 vhost->delay_init = 1; 2792 __ibmvfc_reset_host(vhost); 2793 } 2794 break; 2795 case IBMVFC_AE_SCN_NPORT: 2796 case IBMVFC_AE_SCN_GROUP: 2797 vhost->events_to_log |= IBMVFC_AE_RSCN; 2798 ibmvfc_reinit_host(vhost); 2799 break; 2800 case IBMVFC_AE_ELS_LOGO: 2801 case IBMVFC_AE_ELS_PRLO: 2802 case IBMVFC_AE_ELS_PLOGI: 2803 list_for_each_entry(tgt, &vhost->targets, queue) { 2804 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 2805 break; 2806 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) 2807 continue; 2808 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) 2809 continue; 2810 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) 2811 continue; 2812 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) 2813 tgt->logo_rcvd = 1; 2814 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { 2815 ibmvfc_del_tgt(tgt); 2816 ibmvfc_reinit_host(vhost); 2817 } 2818 } 2819 break; 2820 case IBMVFC_AE_LINK_DOWN: 2821 case IBMVFC_AE_ADAPTER_FAILED: 2822 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2823 break; 2824 case IBMVFC_AE_LINK_DEAD: 2825 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2826 break; 2827 case IBMVFC_AE_HALT: 2828 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2829 break; 2830 default: 2831 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2832 break; 2833 } 2834 } 2835 2836 /** 2837 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2838 * @crq: Command/Response queue 2839 * @vhost: ibmvfc host struct 2840 * 2841 **/ 2842 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2843 { 2844 long rc; 2845 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 2846 2847 switch (crq->valid) { 2848 case IBMVFC_CRQ_INIT_RSP: 2849 switch (crq->format) { 2850 case IBMVFC_CRQ_INIT: 2851 dev_info(vhost->dev, "Partner initialized\n"); 2852 /* Send back a response */ 2853 rc = ibmvfc_send_crq_init_complete(vhost); 2854 if (rc == 0) 2855 ibmvfc_init_host(vhost); 2856 else 2857 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2858 break; 2859 case IBMVFC_CRQ_INIT_COMPLETE: 2860 dev_info(vhost->dev, "Partner initialization complete\n"); 2861 ibmvfc_init_host(vhost); 2862 break; 2863 default: 2864 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2865 } 2866 return; 2867 case IBMVFC_CRQ_XPORT_EVENT: 2868 vhost->state = IBMVFC_NO_CRQ; 2869 vhost->logged_in = 0; 2870 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2871 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2872 /* We need to re-setup the interpartition connection */ 2873 dev_info(vhost->dev, "Partition migrated, Re-enabling adapter\n"); 2874 vhost->client_migrated = 1; 2875 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2876 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2877 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 2878 } else if (crq->format == IBMVFC_PARTNER_FAILED || crq->format == IBMVFC_PARTNER_DEREGISTER) { 2879 dev_err(vhost->dev, "Host partner adapter deregistered or failed (rc=%d)\n", crq->format); 2880 ibmvfc_purge_requests(vhost, DID_ERROR); 2881 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2882 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 2883 } else { 2884 dev_err(vhost->dev, "Received unknown transport event from partner (rc=%d)\n", crq->format); 2885 } 2886 return; 2887 case IBMVFC_CRQ_CMD_RSP: 2888 break; 2889 default: 2890 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2891 return; 2892 } 2893 2894 if (crq->format == IBMVFC_ASYNC_EVENT) 2895 return; 2896 2897 /* The only kind of payload CRQs we should get are responses to 2898 * things we send. Make sure this response is to something we 2899 * actually sent 2900 */ 2901 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2902 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2903 crq->ioba); 2904 return; 2905 } 2906 2907 if (unlikely(atomic_read(&evt->free))) { 2908 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2909 crq->ioba); 2910 return; 2911 } 2912 2913 del_timer(&evt->timer); 2914 list_del(&evt->queue); 2915 ibmvfc_trc_end(evt); 2916 evt->done(evt); 2917 } 2918 2919 /** 2920 * ibmvfc_scan_finished - Check if the device scan is done. 2921 * @shost: scsi host struct 2922 * @time: current elapsed time 2923 * 2924 * Returns: 2925 * 0 if scan is not done / 1 if scan is done 2926 **/ 2927 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2928 { 2929 unsigned long flags; 2930 struct ibmvfc_host *vhost = shost_priv(shost); 2931 int done = 0; 2932 2933 spin_lock_irqsave(shost->host_lock, flags); 2934 if (time >= (init_timeout * HZ)) { 2935 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2936 "continuing initialization\n", init_timeout); 2937 done = 1; 2938 } 2939 2940 if (vhost->scan_complete) 2941 done = 1; 2942 spin_unlock_irqrestore(shost->host_lock, flags); 2943 return done; 2944 } 2945 2946 /** 2947 * ibmvfc_slave_alloc - Setup the device's task set value 2948 * @sdev: struct scsi_device device to configure 2949 * 2950 * Set the device's task set value so that error handling works as 2951 * expected. 2952 * 2953 * Returns: 2954 * 0 on success / -ENXIO if device does not exist 2955 **/ 2956 static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2957 { 2958 struct Scsi_Host *shost = sdev->host; 2959 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2960 struct ibmvfc_host *vhost = shost_priv(shost); 2961 unsigned long flags = 0; 2962 2963 if (!rport || fc_remote_port_chkready(rport)) 2964 return -ENXIO; 2965 2966 spin_lock_irqsave(shost->host_lock, flags); 2967 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2968 spin_unlock_irqrestore(shost->host_lock, flags); 2969 return 0; 2970 } 2971 2972 /** 2973 * ibmvfc_target_alloc - Setup the target's task set value 2974 * @starget: struct scsi_target 2975 * 2976 * Set the target's task set value so that error handling works as 2977 * expected. 2978 * 2979 * Returns: 2980 * 0 on success / -ENXIO if device does not exist 2981 **/ 2982 static int ibmvfc_target_alloc(struct scsi_target *starget) 2983 { 2984 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2985 struct ibmvfc_host *vhost = shost_priv(shost); 2986 unsigned long flags = 0; 2987 2988 spin_lock_irqsave(shost->host_lock, flags); 2989 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2990 spin_unlock_irqrestore(shost->host_lock, flags); 2991 return 0; 2992 } 2993 2994 /** 2995 * ibmvfc_slave_configure - Configure the device 2996 * @sdev: struct scsi_device device to configure 2997 * 2998 * Enable allow_restart for a device if it is a disk. Adjust the 2999 * queue_depth here also. 3000 * 3001 * Returns: 3002 * 0 3003 **/ 3004 static int ibmvfc_slave_configure(struct scsi_device *sdev) 3005 { 3006 struct Scsi_Host *shost = sdev->host; 3007 unsigned long flags = 0; 3008 3009 spin_lock_irqsave(shost->host_lock, flags); 3010 if (sdev->type == TYPE_DISK) { 3011 sdev->allow_restart = 1; 3012 blk_queue_rq_timeout(sdev->request_queue, 120 * HZ); 3013 } 3014 spin_unlock_irqrestore(shost->host_lock, flags); 3015 return 0; 3016 } 3017 3018 /** 3019 * ibmvfc_change_queue_depth - Change the device's queue depth 3020 * @sdev: scsi device struct 3021 * @qdepth: depth to set 3022 * @reason: calling context 3023 * 3024 * Return value: 3025 * actual depth set 3026 **/ 3027 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 3028 { 3029 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 3030 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 3031 3032 return scsi_change_queue_depth(sdev, qdepth); 3033 } 3034 3035 static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 3036 struct device_attribute *attr, char *buf) 3037 { 3038 struct Scsi_Host *shost = class_to_shost(dev); 3039 struct ibmvfc_host *vhost = shost_priv(shost); 3040 3041 return snprintf(buf, PAGE_SIZE, "%s\n", 3042 vhost->login_buf->resp.partition_name); 3043 } 3044 3045 static ssize_t ibmvfc_show_host_device_name(struct device *dev, 3046 struct device_attribute *attr, char *buf) 3047 { 3048 struct Scsi_Host *shost = class_to_shost(dev); 3049 struct ibmvfc_host *vhost = shost_priv(shost); 3050 3051 return snprintf(buf, PAGE_SIZE, "%s\n", 3052 vhost->login_buf->resp.device_name); 3053 } 3054 3055 static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 3056 struct device_attribute *attr, char *buf) 3057 { 3058 struct Scsi_Host *shost = class_to_shost(dev); 3059 struct ibmvfc_host *vhost = shost_priv(shost); 3060 3061 return snprintf(buf, PAGE_SIZE, "%s\n", 3062 vhost->login_buf->resp.port_loc_code); 3063 } 3064 3065 static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 3066 struct device_attribute *attr, char *buf) 3067 { 3068 struct Scsi_Host *shost = class_to_shost(dev); 3069 struct ibmvfc_host *vhost = shost_priv(shost); 3070 3071 return snprintf(buf, PAGE_SIZE, "%s\n", 3072 vhost->login_buf->resp.drc_name); 3073 } 3074 3075 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 3076 struct device_attribute *attr, char *buf) 3077 { 3078 struct Scsi_Host *shost = class_to_shost(dev); 3079 struct ibmvfc_host *vhost = shost_priv(shost); 3080 return snprintf(buf, PAGE_SIZE, "%d\n", be32_to_cpu(vhost->login_buf->resp.version)); 3081 } 3082 3083 static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 3084 struct device_attribute *attr, char *buf) 3085 { 3086 struct Scsi_Host *shost = class_to_shost(dev); 3087 struct ibmvfc_host *vhost = shost_priv(shost); 3088 return snprintf(buf, PAGE_SIZE, "%llx\n", be64_to_cpu(vhost->login_buf->resp.capabilities)); 3089 } 3090 3091 /** 3092 * ibmvfc_show_log_level - Show the adapter's error logging level 3093 * @dev: class device struct 3094 * @buf: buffer 3095 * 3096 * Return value: 3097 * number of bytes printed to buffer 3098 **/ 3099 static ssize_t ibmvfc_show_log_level(struct device *dev, 3100 struct device_attribute *attr, char *buf) 3101 { 3102 struct Scsi_Host *shost = class_to_shost(dev); 3103 struct ibmvfc_host *vhost = shost_priv(shost); 3104 unsigned long flags = 0; 3105 int len; 3106 3107 spin_lock_irqsave(shost->host_lock, flags); 3108 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 3109 spin_unlock_irqrestore(shost->host_lock, flags); 3110 return len; 3111 } 3112 3113 /** 3114 * ibmvfc_store_log_level - Change the adapter's error logging level 3115 * @dev: class device struct 3116 * @buf: buffer 3117 * 3118 * Return value: 3119 * number of bytes printed to buffer 3120 **/ 3121 static ssize_t ibmvfc_store_log_level(struct device *dev, 3122 struct device_attribute *attr, 3123 const char *buf, size_t count) 3124 { 3125 struct Scsi_Host *shost = class_to_shost(dev); 3126 struct ibmvfc_host *vhost = shost_priv(shost); 3127 unsigned long flags = 0; 3128 3129 spin_lock_irqsave(shost->host_lock, flags); 3130 vhost->log_level = simple_strtoul(buf, NULL, 10); 3131 spin_unlock_irqrestore(shost->host_lock, flags); 3132 return strlen(buf); 3133 } 3134 3135 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 3136 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 3137 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 3138 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 3139 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 3140 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 3141 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 3142 ibmvfc_show_log_level, ibmvfc_store_log_level); 3143 3144 #ifdef CONFIG_SCSI_IBMVFC_TRACE 3145 /** 3146 * ibmvfc_read_trace - Dump the adapter trace 3147 * @filp: open sysfs file 3148 * @kobj: kobject struct 3149 * @bin_attr: bin_attribute struct 3150 * @buf: buffer 3151 * @off: offset 3152 * @count: buffer size 3153 * 3154 * Return value: 3155 * number of bytes printed to buffer 3156 **/ 3157 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 3158 struct bin_attribute *bin_attr, 3159 char *buf, loff_t off, size_t count) 3160 { 3161 struct device *dev = container_of(kobj, struct device, kobj); 3162 struct Scsi_Host *shost = class_to_shost(dev); 3163 struct ibmvfc_host *vhost = shost_priv(shost); 3164 unsigned long flags = 0; 3165 int size = IBMVFC_TRACE_SIZE; 3166 char *src = (char *)vhost->trace; 3167 3168 if (off > size) 3169 return 0; 3170 if (off + count > size) { 3171 size -= off; 3172 count = size; 3173 } 3174 3175 spin_lock_irqsave(shost->host_lock, flags); 3176 memcpy(buf, &src[off], count); 3177 spin_unlock_irqrestore(shost->host_lock, flags); 3178 return count; 3179 } 3180 3181 static struct bin_attribute ibmvfc_trace_attr = { 3182 .attr = { 3183 .name = "trace", 3184 .mode = S_IRUGO, 3185 }, 3186 .size = 0, 3187 .read = ibmvfc_read_trace, 3188 }; 3189 #endif 3190 3191 static struct device_attribute *ibmvfc_attrs[] = { 3192 &dev_attr_partition_name, 3193 &dev_attr_device_name, 3194 &dev_attr_port_loc_code, 3195 &dev_attr_drc_name, 3196 &dev_attr_npiv_version, 3197 &dev_attr_capabilities, 3198 &dev_attr_log_level, 3199 NULL 3200 }; 3201 3202 static struct scsi_host_template driver_template = { 3203 .module = THIS_MODULE, 3204 .name = "IBM POWER Virtual FC Adapter", 3205 .proc_name = IBMVFC_NAME, 3206 .queuecommand = ibmvfc_queuecommand, 3207 .eh_timed_out = fc_eh_timed_out, 3208 .eh_abort_handler = ibmvfc_eh_abort_handler, 3209 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3210 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3211 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3212 .slave_alloc = ibmvfc_slave_alloc, 3213 .slave_configure = ibmvfc_slave_configure, 3214 .target_alloc = ibmvfc_target_alloc, 3215 .scan_finished = ibmvfc_scan_finished, 3216 .change_queue_depth = ibmvfc_change_queue_depth, 3217 .cmd_per_lun = 16, 3218 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3219 .this_id = -1, 3220 .sg_tablesize = SG_ALL, 3221 .max_sectors = IBMVFC_MAX_SECTORS, 3222 .shost_attrs = ibmvfc_attrs, 3223 .track_queue_depth = 1, 3224 }; 3225 3226 /** 3227 * ibmvfc_next_async_crq - Returns the next entry in async queue 3228 * @vhost: ibmvfc host struct 3229 * 3230 * Returns: 3231 * Pointer to next entry in queue / NULL if empty 3232 **/ 3233 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3234 { 3235 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 3236 struct ibmvfc_async_crq *crq; 3237 3238 crq = &async_crq->msgs[async_crq->cur]; 3239 if (crq->valid & 0x80) { 3240 if (++async_crq->cur == async_crq->size) 3241 async_crq->cur = 0; 3242 rmb(); 3243 } else 3244 crq = NULL; 3245 3246 return crq; 3247 } 3248 3249 /** 3250 * ibmvfc_next_crq - Returns the next entry in message queue 3251 * @vhost: ibmvfc host struct 3252 * 3253 * Returns: 3254 * Pointer to next entry in queue / NULL if empty 3255 **/ 3256 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3257 { 3258 struct ibmvfc_crq_queue *queue = &vhost->crq; 3259 struct ibmvfc_crq *crq; 3260 3261 crq = &queue->msgs[queue->cur]; 3262 if (crq->valid & 0x80) { 3263 if (++queue->cur == queue->size) 3264 queue->cur = 0; 3265 rmb(); 3266 } else 3267 crq = NULL; 3268 3269 return crq; 3270 } 3271 3272 /** 3273 * ibmvfc_interrupt - Interrupt handler 3274 * @irq: number of irq to handle, not used 3275 * @dev_instance: ibmvfc_host that received interrupt 3276 * 3277 * Returns: 3278 * IRQ_HANDLED 3279 **/ 3280 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3281 { 3282 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3283 unsigned long flags; 3284 3285 spin_lock_irqsave(vhost->host->host_lock, flags); 3286 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3287 tasklet_schedule(&vhost->tasklet); 3288 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3289 return IRQ_HANDLED; 3290 } 3291 3292 /** 3293 * ibmvfc_tasklet - Interrupt handler tasklet 3294 * @data: ibmvfc host struct 3295 * 3296 * Returns: 3297 * Nothing 3298 **/ 3299 static void ibmvfc_tasklet(void *data) 3300 { 3301 struct ibmvfc_host *vhost = data; 3302 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3303 struct ibmvfc_crq *crq; 3304 struct ibmvfc_async_crq *async; 3305 unsigned long flags; 3306 int done = 0; 3307 3308 spin_lock_irqsave(vhost->host->host_lock, flags); 3309 while (!done) { 3310 /* Pull all the valid messages off the async CRQ */ 3311 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3312 ibmvfc_handle_async(async, vhost); 3313 async->valid = 0; 3314 wmb(); 3315 } 3316 3317 /* Pull all the valid messages off the CRQ */ 3318 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3319 ibmvfc_handle_crq(crq, vhost); 3320 crq->valid = 0; 3321 wmb(); 3322 } 3323 3324 vio_enable_interrupts(vdev); 3325 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3326 vio_disable_interrupts(vdev); 3327 ibmvfc_handle_async(async, vhost); 3328 async->valid = 0; 3329 wmb(); 3330 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3331 vio_disable_interrupts(vdev); 3332 ibmvfc_handle_crq(crq, vhost); 3333 crq->valid = 0; 3334 wmb(); 3335 } else 3336 done = 1; 3337 } 3338 3339 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3340 } 3341 3342 /** 3343 * ibmvfc_init_tgt - Set the next init job step for the target 3344 * @tgt: ibmvfc target struct 3345 * @job_step: job step to perform 3346 * 3347 **/ 3348 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3349 void (*job_step) (struct ibmvfc_target *)) 3350 { 3351 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT)) 3352 tgt->job_step = job_step; 3353 wake_up(&tgt->vhost->work_wait_q); 3354 } 3355 3356 /** 3357 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3358 * @tgt: ibmvfc target struct 3359 * @job_step: initialization job step 3360 * 3361 * Returns: 1 if step will be retried / 0 if not 3362 * 3363 **/ 3364 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3365 void (*job_step) (struct ibmvfc_target *)) 3366 { 3367 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3368 ibmvfc_del_tgt(tgt); 3369 wake_up(&tgt->vhost->work_wait_q); 3370 return 0; 3371 } else 3372 ibmvfc_init_tgt(tgt, job_step); 3373 return 1; 3374 } 3375 3376 /* Defined in FC-LS */ 3377 static const struct { 3378 int code; 3379 int retry; 3380 int logged_in; 3381 } prli_rsp [] = { 3382 { 0, 1, 0 }, 3383 { 1, 0, 1 }, 3384 { 2, 1, 0 }, 3385 { 3, 1, 0 }, 3386 { 4, 0, 0 }, 3387 { 5, 0, 0 }, 3388 { 6, 0, 1 }, 3389 { 7, 0, 0 }, 3390 { 8, 1, 0 }, 3391 }; 3392 3393 /** 3394 * ibmvfc_get_prli_rsp - Find PRLI response index 3395 * @flags: PRLI response flags 3396 * 3397 **/ 3398 static int ibmvfc_get_prli_rsp(u16 flags) 3399 { 3400 int i; 3401 int code = (flags & 0x0f00) >> 8; 3402 3403 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3404 if (prli_rsp[i].code == code) 3405 return i; 3406 3407 return 0; 3408 } 3409 3410 /** 3411 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3412 * @evt: ibmvfc event struct 3413 * 3414 **/ 3415 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3416 { 3417 struct ibmvfc_target *tgt = evt->tgt; 3418 struct ibmvfc_host *vhost = evt->vhost; 3419 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3420 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3421 u32 status = be16_to_cpu(rsp->common.status); 3422 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3423 3424 vhost->discovery_threads--; 3425 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3426 switch (status) { 3427 case IBMVFC_MAD_SUCCESS: 3428 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3429 parms->type, parms->flags, parms->service_parms); 3430 3431 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3432 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); 3433 if (prli_rsp[index].logged_in) { 3434 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { 3435 tgt->need_login = 0; 3436 tgt->ids.roles = 0; 3437 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) 3438 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3439 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) 3440 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3441 tgt->add_rport = 1; 3442 } else 3443 ibmvfc_del_tgt(tgt); 3444 } else if (prli_rsp[index].retry) 3445 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3446 else 3447 ibmvfc_del_tgt(tgt); 3448 } else 3449 ibmvfc_del_tgt(tgt); 3450 break; 3451 case IBMVFC_MAD_DRIVER_FAILED: 3452 break; 3453 case IBMVFC_MAD_CRQ_ERROR: 3454 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3455 break; 3456 case IBMVFC_MAD_FAILED: 3457 default: 3458 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && 3459 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) 3460 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3461 else if (tgt->logo_rcvd) 3462 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3463 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3464 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3465 else 3466 ibmvfc_del_tgt(tgt); 3467 3468 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3469 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3470 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), status); 3471 break; 3472 } 3473 3474 kref_put(&tgt->kref, ibmvfc_release_tgt); 3475 ibmvfc_free_event(evt); 3476 wake_up(&vhost->work_wait_q); 3477 } 3478 3479 /** 3480 * ibmvfc_tgt_send_prli - Send a process login 3481 * @tgt: ibmvfc target struct 3482 * 3483 **/ 3484 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3485 { 3486 struct ibmvfc_process_login *prli; 3487 struct ibmvfc_host *vhost = tgt->vhost; 3488 struct ibmvfc_event *evt; 3489 3490 if (vhost->discovery_threads >= disc_threads) 3491 return; 3492 3493 kref_get(&tgt->kref); 3494 evt = ibmvfc_get_event(vhost); 3495 vhost->discovery_threads++; 3496 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 3497 evt->tgt = tgt; 3498 prli = &evt->iu.prli; 3499 memset(prli, 0, sizeof(*prli)); 3500 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 3501 prli->common.version = cpu_to_be32(2); 3502 prli->target_wwpn = cpu_to_be64(tgt->wwpn); 3503 } else { 3504 prli->common.version = cpu_to_be32(1); 3505 } 3506 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); 3507 prli->common.length = cpu_to_be16(sizeof(*prli)); 3508 prli->scsi_id = cpu_to_be64(tgt->scsi_id); 3509 3510 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 3511 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); 3512 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); 3513 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED); 3514 3515 if (cls3_error) 3516 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY); 3517 3518 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3519 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3520 vhost->discovery_threads--; 3521 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3522 kref_put(&tgt->kref, ibmvfc_release_tgt); 3523 } else 3524 tgt_dbg(tgt, "Sent process login\n"); 3525 } 3526 3527 /** 3528 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 3529 * @evt: ibmvfc event struct 3530 * 3531 **/ 3532 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 3533 { 3534 struct ibmvfc_target *tgt = evt->tgt; 3535 struct ibmvfc_host *vhost = evt->vhost; 3536 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 3537 u32 status = be16_to_cpu(rsp->common.status); 3538 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3539 3540 vhost->discovery_threads--; 3541 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3542 switch (status) { 3543 case IBMVFC_MAD_SUCCESS: 3544 tgt_dbg(tgt, "Port Login succeeded\n"); 3545 if (tgt->ids.port_name && 3546 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 3547 vhost->reinit = 1; 3548 tgt_dbg(tgt, "Port re-init required\n"); 3549 break; 3550 } 3551 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3552 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3553 tgt->ids.port_id = tgt->scsi_id; 3554 memcpy(&tgt->service_parms, &rsp->service_parms, 3555 sizeof(tgt->service_parms)); 3556 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3557 sizeof(tgt->service_parms_change)); 3558 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3559 break; 3560 case IBMVFC_MAD_DRIVER_FAILED: 3561 break; 3562 case IBMVFC_MAD_CRQ_ERROR: 3563 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3564 break; 3565 case IBMVFC_MAD_FAILED: 3566 default: 3567 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3568 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3569 else 3570 ibmvfc_del_tgt(tgt); 3571 3572 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3573 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3574 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), 3575 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), 3576 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status); 3577 break; 3578 } 3579 3580 kref_put(&tgt->kref, ibmvfc_release_tgt); 3581 ibmvfc_free_event(evt); 3582 wake_up(&vhost->work_wait_q); 3583 } 3584 3585 /** 3586 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 3587 * @tgt: ibmvfc target struct 3588 * 3589 **/ 3590 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 3591 { 3592 struct ibmvfc_port_login *plogi; 3593 struct ibmvfc_host *vhost = tgt->vhost; 3594 struct ibmvfc_event *evt; 3595 3596 if (vhost->discovery_threads >= disc_threads) 3597 return; 3598 3599 kref_get(&tgt->kref); 3600 tgt->logo_rcvd = 0; 3601 evt = ibmvfc_get_event(vhost); 3602 vhost->discovery_threads++; 3603 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3604 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 3605 evt->tgt = tgt; 3606 plogi = &evt->iu.plogi; 3607 memset(plogi, 0, sizeof(*plogi)); 3608 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 3609 plogi->common.version = cpu_to_be32(2); 3610 plogi->target_wwpn = cpu_to_be64(tgt->wwpn); 3611 } else { 3612 plogi->common.version = cpu_to_be32(1); 3613 } 3614 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 3615 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 3616 plogi->scsi_id = cpu_to_be64(tgt->scsi_id); 3617 3618 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3619 vhost->discovery_threads--; 3620 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3621 kref_put(&tgt->kref, ibmvfc_release_tgt); 3622 } else 3623 tgt_dbg(tgt, "Sent port login\n"); 3624 } 3625 3626 /** 3627 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3628 * @evt: ibmvfc event struct 3629 * 3630 **/ 3631 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3632 { 3633 struct ibmvfc_target *tgt = evt->tgt; 3634 struct ibmvfc_host *vhost = evt->vhost; 3635 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3636 u32 status = be16_to_cpu(rsp->common.status); 3637 3638 vhost->discovery_threads--; 3639 ibmvfc_free_event(evt); 3640 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3641 3642 switch (status) { 3643 case IBMVFC_MAD_SUCCESS: 3644 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3645 break; 3646 case IBMVFC_MAD_DRIVER_FAILED: 3647 kref_put(&tgt->kref, ibmvfc_release_tgt); 3648 wake_up(&vhost->work_wait_q); 3649 return; 3650 case IBMVFC_MAD_FAILED: 3651 default: 3652 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3653 break; 3654 } 3655 3656 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3657 kref_put(&tgt->kref, ibmvfc_release_tgt); 3658 wake_up(&vhost->work_wait_q); 3659 } 3660 3661 /** 3662 * __ibmvfc_tgt_get_implicit_logout_evt - Allocate and init an event for implicit logout 3663 * @tgt: ibmvfc target struct 3664 * 3665 * Returns: 3666 * Allocated and initialized ibmvfc_event struct 3667 **/ 3668 static struct ibmvfc_event *__ibmvfc_tgt_get_implicit_logout_evt(struct ibmvfc_target *tgt, 3669 void (*done) (struct ibmvfc_event *)) 3670 { 3671 struct ibmvfc_implicit_logout *mad; 3672 struct ibmvfc_host *vhost = tgt->vhost; 3673 struct ibmvfc_event *evt; 3674 3675 kref_get(&tgt->kref); 3676 evt = ibmvfc_get_event(vhost); 3677 ibmvfc_init_event(evt, done, IBMVFC_MAD_FORMAT); 3678 evt->tgt = tgt; 3679 mad = &evt->iu.implicit_logout; 3680 memset(mad, 0, sizeof(*mad)); 3681 mad->common.version = cpu_to_be32(1); 3682 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); 3683 mad->common.length = cpu_to_be16(sizeof(*mad)); 3684 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); 3685 return evt; 3686 } 3687 3688 /** 3689 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3690 * @tgt: ibmvfc target struct 3691 * 3692 **/ 3693 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3694 { 3695 struct ibmvfc_host *vhost = tgt->vhost; 3696 struct ibmvfc_event *evt; 3697 3698 if (vhost->discovery_threads >= disc_threads) 3699 return; 3700 3701 vhost->discovery_threads++; 3702 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, 3703 ibmvfc_tgt_implicit_logout_done); 3704 3705 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3706 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3707 vhost->discovery_threads--; 3708 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3709 kref_put(&tgt->kref, ibmvfc_release_tgt); 3710 } else 3711 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3712 } 3713 3714 /** 3715 * ibmvfc_tgt_implicit_logout_and_del_done - Completion handler for Implicit Logout MAD 3716 * @evt: ibmvfc event struct 3717 * 3718 **/ 3719 static void ibmvfc_tgt_implicit_logout_and_del_done(struct ibmvfc_event *evt) 3720 { 3721 struct ibmvfc_target *tgt = evt->tgt; 3722 struct ibmvfc_host *vhost = evt->vhost; 3723 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3724 u32 status = be16_to_cpu(mad->common.status); 3725 3726 vhost->discovery_threads--; 3727 ibmvfc_free_event(evt); 3728 3729 /* 3730 * If our state is IBMVFC_HOST_OFFLINE, we could be unloading the 3731 * driver in which case we need to free up all the targets. If we are 3732 * not unloading, we will still go through a hard reset to get out of 3733 * offline state, so there is no need to track the old targets in that 3734 * case. 3735 */ 3736 if (status == IBMVFC_MAD_SUCCESS || vhost->state == IBMVFC_HOST_OFFLINE) 3737 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3738 else 3739 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT); 3740 3741 tgt_dbg(tgt, "Implicit Logout %s\n", (status == IBMVFC_MAD_SUCCESS) ? "succeeded" : "failed"); 3742 kref_put(&tgt->kref, ibmvfc_release_tgt); 3743 wake_up(&vhost->work_wait_q); 3744 } 3745 3746 /** 3747 * ibmvfc_tgt_implicit_logout_and_del - Initiate an Implicit Logout for specified target 3748 * @tgt: ibmvfc target struct 3749 * 3750 **/ 3751 static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *tgt) 3752 { 3753 struct ibmvfc_host *vhost = tgt->vhost; 3754 struct ibmvfc_event *evt; 3755 3756 if (!vhost->logged_in) { 3757 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3758 return; 3759 } 3760 3761 if (vhost->discovery_threads >= disc_threads) 3762 return; 3763 3764 vhost->discovery_threads++; 3765 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, 3766 ibmvfc_tgt_implicit_logout_and_del_done); 3767 3768 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT); 3769 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3770 vhost->discovery_threads--; 3771 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3772 kref_put(&tgt->kref, ibmvfc_release_tgt); 3773 } else 3774 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3775 } 3776 3777 /** 3778 * ibmvfc_tgt_move_login_done - Completion handler for Move Login 3779 * @evt: ibmvfc event struct 3780 * 3781 **/ 3782 static void ibmvfc_tgt_move_login_done(struct ibmvfc_event *evt) 3783 { 3784 struct ibmvfc_target *tgt = evt->tgt; 3785 struct ibmvfc_host *vhost = evt->vhost; 3786 struct ibmvfc_move_login *rsp = &evt->xfer_iu->move_login; 3787 u32 status = be16_to_cpu(rsp->common.status); 3788 int level = IBMVFC_DEFAULT_LOG_LEVEL; 3789 3790 vhost->discovery_threads--; 3791 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3792 switch (status) { 3793 case IBMVFC_MAD_SUCCESS: 3794 tgt_dbg(tgt, "Move Login succeeded for old scsi_id: %llX\n", tgt->old_scsi_id); 3795 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 3796 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 3797 tgt->ids.port_id = tgt->scsi_id; 3798 memcpy(&tgt->service_parms, &rsp->service_parms, 3799 sizeof(tgt->service_parms)); 3800 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 3801 sizeof(tgt->service_parms_change)); 3802 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 3803 break; 3804 case IBMVFC_MAD_DRIVER_FAILED: 3805 break; 3806 case IBMVFC_MAD_CRQ_ERROR: 3807 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); 3808 break; 3809 case IBMVFC_MAD_FAILED: 3810 default: 3811 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); 3812 3813 tgt_log(tgt, level, 3814 "Move Login failed: old scsi_id: %llX, flags:%x, vios_flags:%x, rc=0x%02X\n", 3815 tgt->old_scsi_id, be32_to_cpu(rsp->flags), be16_to_cpu(rsp->vios_flags), 3816 status); 3817 break; 3818 } 3819 3820 kref_put(&tgt->kref, ibmvfc_release_tgt); 3821 ibmvfc_free_event(evt); 3822 wake_up(&vhost->work_wait_q); 3823 } 3824 3825 3826 /** 3827 * ibmvfc_tgt_move_login - Initiate a move login for specified target 3828 * @tgt: ibmvfc target struct 3829 * 3830 **/ 3831 static void ibmvfc_tgt_move_login(struct ibmvfc_target *tgt) 3832 { 3833 struct ibmvfc_host *vhost = tgt->vhost; 3834 struct ibmvfc_move_login *move; 3835 struct ibmvfc_event *evt; 3836 3837 if (vhost->discovery_threads >= disc_threads) 3838 return; 3839 3840 kref_get(&tgt->kref); 3841 evt = ibmvfc_get_event(vhost); 3842 vhost->discovery_threads++; 3843 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3844 ibmvfc_init_event(evt, ibmvfc_tgt_move_login_done, IBMVFC_MAD_FORMAT); 3845 evt->tgt = tgt; 3846 move = &evt->iu.move_login; 3847 memset(move, 0, sizeof(*move)); 3848 move->common.version = cpu_to_be32(1); 3849 move->common.opcode = cpu_to_be32(IBMVFC_MOVE_LOGIN); 3850 move->common.length = cpu_to_be16(sizeof(*move)); 3851 3852 move->old_scsi_id = cpu_to_be64(tgt->old_scsi_id); 3853 move->new_scsi_id = cpu_to_be64(tgt->scsi_id); 3854 move->wwpn = cpu_to_be64(tgt->wwpn); 3855 move->node_name = cpu_to_be64(tgt->ids.node_name); 3856 3857 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3858 vhost->discovery_threads--; 3859 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3860 kref_put(&tgt->kref, ibmvfc_release_tgt); 3861 } else 3862 tgt_dbg(tgt, "Sent Move Login for old scsi_id: %llX\n", tgt->old_scsi_id); 3863 } 3864 3865 /** 3866 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3867 * @mad: ibmvfc passthru mad struct 3868 * @tgt: ibmvfc target struct 3869 * 3870 * Returns: 3871 * 1 if PLOGI needed / 0 if PLOGI not needed 3872 **/ 3873 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3874 struct ibmvfc_target *tgt) 3875 { 3876 if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name) 3877 return 1; 3878 if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name) 3879 return 1; 3880 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) 3881 return 1; 3882 return 0; 3883 } 3884 3885 /** 3886 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3887 * @evt: ibmvfc event struct 3888 * 3889 **/ 3890 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3891 { 3892 struct ibmvfc_target *tgt = evt->tgt; 3893 struct ibmvfc_host *vhost = evt->vhost; 3894 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3895 u32 status = be16_to_cpu(mad->common.status); 3896 u8 fc_reason, fc_explain; 3897 3898 vhost->discovery_threads--; 3899 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3900 del_timer(&tgt->timer); 3901 3902 switch (status) { 3903 case IBMVFC_MAD_SUCCESS: 3904 tgt_dbg(tgt, "ADISC succeeded\n"); 3905 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3906 ibmvfc_del_tgt(tgt); 3907 break; 3908 case IBMVFC_MAD_DRIVER_FAILED: 3909 break; 3910 case IBMVFC_MAD_FAILED: 3911 default: 3912 ibmvfc_del_tgt(tgt); 3913 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; 3914 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; 3915 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3916 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), 3917 be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error), 3918 ibmvfc_get_fc_type(fc_reason), fc_reason, 3919 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3920 break; 3921 } 3922 3923 kref_put(&tgt->kref, ibmvfc_release_tgt); 3924 ibmvfc_free_event(evt); 3925 wake_up(&vhost->work_wait_q); 3926 } 3927 3928 /** 3929 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3930 * @evt: ibmvfc event struct 3931 * 3932 **/ 3933 static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3934 { 3935 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3936 3937 memset(mad, 0, sizeof(*mad)); 3938 mad->common.version = cpu_to_be32(1); 3939 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 3940 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 3941 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3942 offsetof(struct ibmvfc_passthru_mad, iu)); 3943 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 3944 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3945 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3946 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3947 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3948 offsetof(struct ibmvfc_passthru_fc_iu, payload)); 3949 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 3950 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 3951 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3952 offsetof(struct ibmvfc_passthru_fc_iu, response)); 3953 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); 3954 } 3955 3956 /** 3957 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 3958 * @evt: ibmvfc event struct 3959 * 3960 * Just cleanup this event struct. Everything else is handled by 3961 * the ADISC completion handler. If the ADISC never actually comes 3962 * back, we still have the timer running on the ADISC event struct 3963 * which will fire and cause the CRQ to get reset. 3964 * 3965 **/ 3966 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 3967 { 3968 struct ibmvfc_host *vhost = evt->vhost; 3969 struct ibmvfc_target *tgt = evt->tgt; 3970 3971 tgt_dbg(tgt, "ADISC cancel complete\n"); 3972 vhost->abort_threads--; 3973 ibmvfc_free_event(evt); 3974 kref_put(&tgt->kref, ibmvfc_release_tgt); 3975 wake_up(&vhost->work_wait_q); 3976 } 3977 3978 /** 3979 * ibmvfc_adisc_timeout - Handle an ADISC timeout 3980 * @tgt: ibmvfc target struct 3981 * 3982 * If an ADISC times out, send a cancel. If the cancel times 3983 * out, reset the CRQ. When the ADISC comes back as cancelled, 3984 * log back into the target. 3985 **/ 3986 static void ibmvfc_adisc_timeout(struct timer_list *t) 3987 { 3988 struct ibmvfc_target *tgt = from_timer(tgt, t, timer); 3989 struct ibmvfc_host *vhost = tgt->vhost; 3990 struct ibmvfc_event *evt; 3991 struct ibmvfc_tmf *tmf; 3992 unsigned long flags; 3993 int rc; 3994 3995 tgt_dbg(tgt, "ADISC timeout\n"); 3996 spin_lock_irqsave(vhost->host->host_lock, flags); 3997 if (vhost->abort_threads >= disc_threads || 3998 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 3999 vhost->state != IBMVFC_INITIALIZING || 4000 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 4001 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4002 return; 4003 } 4004 4005 vhost->abort_threads++; 4006 kref_get(&tgt->kref); 4007 evt = ibmvfc_get_event(vhost); 4008 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 4009 4010 evt->tgt = tgt; 4011 tmf = &evt->iu.tmf; 4012 memset(tmf, 0, sizeof(*tmf)); 4013 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 4014 tmf->common.version = cpu_to_be32(2); 4015 tmf->target_wwpn = cpu_to_be64(tgt->wwpn); 4016 } else { 4017 tmf->common.version = cpu_to_be32(1); 4018 } 4019 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 4020 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 4021 tmf->scsi_id = cpu_to_be64(tgt->scsi_id); 4022 tmf->cancel_key = cpu_to_be32(tgt->cancel_key); 4023 4024 rc = ibmvfc_send_event(evt, vhost, default_timeout); 4025 4026 if (rc) { 4027 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 4028 vhost->abort_threads--; 4029 kref_put(&tgt->kref, ibmvfc_release_tgt); 4030 __ibmvfc_reset_host(vhost); 4031 } else 4032 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 4033 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4034 } 4035 4036 /** 4037 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 4038 * @tgt: ibmvfc target struct 4039 * 4040 * When sending an ADISC we end up with two timers running. The 4041 * first timer is the timer in the ibmvfc target struct. If this 4042 * fires, we send a cancel to the target. The second timer is the 4043 * timer on the ibmvfc event for the ADISC, which is longer. If that 4044 * fires, it means the ADISC timed out and our attempt to cancel it 4045 * also failed, so we need to reset the CRQ. 4046 **/ 4047 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 4048 { 4049 struct ibmvfc_passthru_mad *mad; 4050 struct ibmvfc_host *vhost = tgt->vhost; 4051 struct ibmvfc_event *evt; 4052 4053 if (vhost->discovery_threads >= disc_threads) 4054 return; 4055 4056 kref_get(&tgt->kref); 4057 evt = ibmvfc_get_event(vhost); 4058 vhost->discovery_threads++; 4059 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 4060 evt->tgt = tgt; 4061 4062 ibmvfc_init_passthru(evt); 4063 mad = &evt->iu.passthru; 4064 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); 4065 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); 4066 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); 4067 4068 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); 4069 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 4070 sizeof(vhost->login_buf->resp.port_name)); 4071 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 4072 sizeof(vhost->login_buf->resp.node_name)); 4073 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); 4074 4075 if (timer_pending(&tgt->timer)) 4076 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 4077 else { 4078 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 4079 add_timer(&tgt->timer); 4080 } 4081 4082 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4083 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 4084 vhost->discovery_threads--; 4085 del_timer(&tgt->timer); 4086 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4087 kref_put(&tgt->kref, ibmvfc_release_tgt); 4088 } else 4089 tgt_dbg(tgt, "Sent ADISC\n"); 4090 } 4091 4092 /** 4093 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 4094 * @evt: ibmvfc event struct 4095 * 4096 **/ 4097 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 4098 { 4099 struct ibmvfc_target *tgt = evt->tgt; 4100 struct ibmvfc_host *vhost = evt->vhost; 4101 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 4102 u32 status = be16_to_cpu(rsp->common.status); 4103 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4104 4105 vhost->discovery_threads--; 4106 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4107 switch (status) { 4108 case IBMVFC_MAD_SUCCESS: 4109 tgt_dbg(tgt, "Query Target succeeded\n"); 4110 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) 4111 ibmvfc_del_tgt(tgt); 4112 else 4113 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 4114 break; 4115 case IBMVFC_MAD_DRIVER_FAILED: 4116 break; 4117 case IBMVFC_MAD_CRQ_ERROR: 4118 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 4119 break; 4120 case IBMVFC_MAD_FAILED: 4121 default: 4122 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 4123 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && 4124 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) 4125 ibmvfc_del_tgt(tgt); 4126 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4127 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 4128 else 4129 ibmvfc_del_tgt(tgt); 4130 4131 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 4132 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4133 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), 4134 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), 4135 ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), 4136 status); 4137 break; 4138 } 4139 4140 kref_put(&tgt->kref, ibmvfc_release_tgt); 4141 ibmvfc_free_event(evt); 4142 wake_up(&vhost->work_wait_q); 4143 } 4144 4145 /** 4146 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 4147 * @tgt: ibmvfc target struct 4148 * 4149 **/ 4150 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 4151 { 4152 struct ibmvfc_query_tgt *query_tgt; 4153 struct ibmvfc_host *vhost = tgt->vhost; 4154 struct ibmvfc_event *evt; 4155 4156 if (vhost->discovery_threads >= disc_threads) 4157 return; 4158 4159 kref_get(&tgt->kref); 4160 evt = ibmvfc_get_event(vhost); 4161 vhost->discovery_threads++; 4162 evt->tgt = tgt; 4163 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 4164 query_tgt = &evt->iu.query_tgt; 4165 memset(query_tgt, 0, sizeof(*query_tgt)); 4166 query_tgt->common.version = cpu_to_be32(1); 4167 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); 4168 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); 4169 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); 4170 4171 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4172 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4173 vhost->discovery_threads--; 4174 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4175 kref_put(&tgt->kref, ibmvfc_release_tgt); 4176 } else 4177 tgt_dbg(tgt, "Sent Query Target\n"); 4178 } 4179 4180 /** 4181 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 4182 * @vhost: ibmvfc host struct 4183 * @scsi_id: SCSI ID to allocate target for 4184 * 4185 * Returns: 4186 * 0 on success / other on failure 4187 **/ 4188 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, 4189 struct ibmvfc_discover_targets_entry *target) 4190 { 4191 struct ibmvfc_target *stgt = NULL; 4192 struct ibmvfc_target *wtgt = NULL; 4193 struct ibmvfc_target *tgt; 4194 unsigned long flags; 4195 u64 scsi_id = be32_to_cpu(target->scsi_id) & IBMVFC_DISC_TGT_SCSI_ID_MASK; 4196 u64 wwpn = be64_to_cpu(target->wwpn); 4197 4198 /* Look to see if we already have a target allocated for this SCSI ID or WWPN */ 4199 spin_lock_irqsave(vhost->host->host_lock, flags); 4200 list_for_each_entry(tgt, &vhost->targets, queue) { 4201 if (tgt->wwpn == wwpn) { 4202 wtgt = tgt; 4203 break; 4204 } 4205 } 4206 4207 list_for_each_entry(tgt, &vhost->targets, queue) { 4208 if (tgt->scsi_id == scsi_id) { 4209 stgt = tgt; 4210 break; 4211 } 4212 } 4213 4214 if (wtgt && !stgt) { 4215 /* 4216 * A WWPN target has moved and we still are tracking the old 4217 * SCSI ID. The only way we should be able to get here is if 4218 * we attempted to send an implicit logout for the old SCSI ID 4219 * and it failed for some reason, such as there being I/O 4220 * pending to the target. In this case, we will have already 4221 * deleted the rport from the FC transport so we do a move 4222 * login, which works even with I/O pending, as it will cancel 4223 * any active commands. 4224 */ 4225 if (wtgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 4226 /* 4227 * Do a move login here. The old target is no longer 4228 * known to the transport layer We don't use the 4229 * normal ibmvfc_set_tgt_action to set this, as we 4230 * don't normally want to allow this state change. 4231 */ 4232 wtgt->old_scsi_id = wtgt->scsi_id; 4233 wtgt->scsi_id = scsi_id; 4234 wtgt->action = IBMVFC_TGT_ACTION_INIT; 4235 ibmvfc_init_tgt(wtgt, ibmvfc_tgt_move_login); 4236 goto unlock_out; 4237 } else { 4238 tgt_err(wtgt, "Unexpected target state: %d, %p\n", 4239 wtgt->action, wtgt->rport); 4240 } 4241 } else if (stgt) { 4242 if (tgt->need_login) 4243 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 4244 goto unlock_out; 4245 } 4246 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4247 4248 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 4249 memset(tgt, 0, sizeof(*tgt)); 4250 tgt->scsi_id = scsi_id; 4251 tgt->wwpn = wwpn; 4252 tgt->vhost = vhost; 4253 tgt->need_login = 1; 4254 timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0); 4255 kref_init(&tgt->kref); 4256 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 4257 spin_lock_irqsave(vhost->host->host_lock, flags); 4258 tgt->cancel_key = vhost->task_set++; 4259 list_add_tail(&tgt->queue, &vhost->targets); 4260 4261 unlock_out: 4262 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4263 return 0; 4264 } 4265 4266 /** 4267 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 4268 * @vhost: ibmvfc host struct 4269 * 4270 * Returns: 4271 * 0 on success / other on failure 4272 **/ 4273 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 4274 { 4275 int i, rc; 4276 4277 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 4278 rc = ibmvfc_alloc_target(vhost, &vhost->disc_buf[i]); 4279 4280 return rc; 4281 } 4282 4283 /** 4284 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 4285 * @evt: ibmvfc event struct 4286 * 4287 **/ 4288 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 4289 { 4290 struct ibmvfc_host *vhost = evt->vhost; 4291 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 4292 u32 mad_status = be16_to_cpu(rsp->common.status); 4293 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4294 4295 switch (mad_status) { 4296 case IBMVFC_MAD_SUCCESS: 4297 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 4298 vhost->num_targets = be32_to_cpu(rsp->num_written); 4299 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 4300 break; 4301 case IBMVFC_MAD_FAILED: 4302 level += ibmvfc_retry_host_init(vhost); 4303 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 4304 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4305 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); 4306 break; 4307 case IBMVFC_MAD_DRIVER_FAILED: 4308 break; 4309 default: 4310 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 4311 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4312 break; 4313 } 4314 4315 ibmvfc_free_event(evt); 4316 wake_up(&vhost->work_wait_q); 4317 } 4318 4319 /** 4320 * ibmvfc_discover_targets - Send Discover Targets MAD 4321 * @vhost: ibmvfc host struct 4322 * 4323 **/ 4324 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 4325 { 4326 struct ibmvfc_discover_targets *mad; 4327 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4328 4329 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 4330 mad = &evt->iu.discover_targets; 4331 memset(mad, 0, sizeof(*mad)); 4332 mad->common.version = cpu_to_be32(1); 4333 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); 4334 mad->common.length = cpu_to_be16(sizeof(*mad)); 4335 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz); 4336 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma); 4337 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz); 4338 mad->flags = cpu_to_be32(IBMVFC_DISC_TGT_PORT_ID_WWPN_LIST); 4339 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4340 4341 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4342 ibmvfc_dbg(vhost, "Sent discover targets\n"); 4343 else 4344 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4345 } 4346 4347 /** 4348 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 4349 * @evt: ibmvfc event struct 4350 * 4351 **/ 4352 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 4353 { 4354 struct ibmvfc_host *vhost = evt->vhost; 4355 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); 4356 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 4357 unsigned int npiv_max_sectors; 4358 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4359 4360 switch (mad_status) { 4361 case IBMVFC_MAD_SUCCESS: 4362 ibmvfc_free_event(evt); 4363 break; 4364 case IBMVFC_MAD_FAILED: 4365 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4366 level += ibmvfc_retry_host_init(vhost); 4367 else 4368 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4369 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 4370 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4371 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); 4372 ibmvfc_free_event(evt); 4373 return; 4374 case IBMVFC_MAD_CRQ_ERROR: 4375 ibmvfc_retry_host_init(vhost); 4376 fallthrough; 4377 case IBMVFC_MAD_DRIVER_FAILED: 4378 ibmvfc_free_event(evt); 4379 return; 4380 default: 4381 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 4382 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4383 ibmvfc_free_event(evt); 4384 return; 4385 } 4386 4387 vhost->client_migrated = 0; 4388 4389 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { 4390 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 4391 rsp->flags); 4392 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4393 wake_up(&vhost->work_wait_q); 4394 return; 4395 } 4396 4397 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { 4398 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 4399 rsp->max_cmds); 4400 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4401 wake_up(&vhost->work_wait_q); 4402 return; 4403 } 4404 4405 vhost->logged_in = 1; 4406 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); 4407 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 4408 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 4409 rsp->drc_name, npiv_max_sectors); 4410 4411 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); 4412 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); 4413 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); 4414 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); 4415 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 4416 fc_host_supported_classes(vhost->host) = 0; 4417 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) 4418 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 4419 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) 4420 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 4421 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) 4422 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 4423 fc_host_maxframe_size(vhost->host) = 4424 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; 4425 4426 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; 4427 vhost->host->max_sectors = npiv_max_sectors; 4428 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4429 wake_up(&vhost->work_wait_q); 4430 } 4431 4432 /** 4433 * ibmvfc_npiv_login - Sends NPIV login 4434 * @vhost: ibmvfc host struct 4435 * 4436 **/ 4437 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 4438 { 4439 struct ibmvfc_npiv_login_mad *mad; 4440 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 4441 4442 ibmvfc_gather_partition_info(vhost); 4443 ibmvfc_set_login_info(vhost); 4444 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 4445 4446 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 4447 mad = &evt->iu.npiv_login; 4448 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 4449 mad->common.version = cpu_to_be32(1); 4450 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); 4451 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); 4452 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); 4453 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); 4454 4455 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4456 4457 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4458 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 4459 else 4460 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4461 } 4462 4463 /** 4464 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 4465 * @vhost: ibmvfc host struct 4466 * 4467 **/ 4468 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 4469 { 4470 struct ibmvfc_host *vhost = evt->vhost; 4471 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); 4472 4473 ibmvfc_free_event(evt); 4474 4475 switch (mad_status) { 4476 case IBMVFC_MAD_SUCCESS: 4477 if (list_empty(&vhost->sent) && 4478 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 4479 ibmvfc_init_host(vhost); 4480 return; 4481 } 4482 break; 4483 case IBMVFC_MAD_FAILED: 4484 case IBMVFC_MAD_NOT_SUPPORTED: 4485 case IBMVFC_MAD_CRQ_ERROR: 4486 case IBMVFC_MAD_DRIVER_FAILED: 4487 default: 4488 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 4489 break; 4490 } 4491 4492 ibmvfc_hard_reset_host(vhost); 4493 } 4494 4495 /** 4496 * ibmvfc_npiv_logout - Issue an NPIV Logout 4497 * @vhost: ibmvfc host struct 4498 * 4499 **/ 4500 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 4501 { 4502 struct ibmvfc_npiv_logout_mad *mad; 4503 struct ibmvfc_event *evt; 4504 4505 evt = ibmvfc_get_event(vhost); 4506 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 4507 4508 mad = &evt->iu.npiv_logout; 4509 memset(mad, 0, sizeof(*mad)); 4510 mad->common.version = cpu_to_be32(1); 4511 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); 4512 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); 4513 4514 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 4515 4516 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4517 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 4518 else 4519 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4520 } 4521 4522 /** 4523 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 4524 * @vhost: ibmvfc host struct 4525 * 4526 * Returns: 4527 * 1 if work to do / 0 if not 4528 **/ 4529 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 4530 { 4531 struct ibmvfc_target *tgt; 4532 4533 list_for_each_entry(tgt, &vhost->targets, queue) { 4534 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 4535 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4536 return 1; 4537 } 4538 4539 return 0; 4540 } 4541 4542 /** 4543 * ibmvfc_dev_logo_to_do - Is there target logout work to do? 4544 * @vhost: ibmvfc host struct 4545 * 4546 * Returns: 4547 * 1 if work to do / 0 if not 4548 **/ 4549 static int ibmvfc_dev_logo_to_do(struct ibmvfc_host *vhost) 4550 { 4551 struct ibmvfc_target *tgt; 4552 4553 list_for_each_entry(tgt, &vhost->targets, queue) { 4554 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT || 4555 tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) 4556 return 1; 4557 } 4558 return 0; 4559 } 4560 4561 /** 4562 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 4563 * @vhost: ibmvfc host struct 4564 * 4565 * Returns: 4566 * 1 if work to do / 0 if not 4567 **/ 4568 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4569 { 4570 struct ibmvfc_target *tgt; 4571 4572 if (kthread_should_stop()) 4573 return 1; 4574 switch (vhost->action) { 4575 case IBMVFC_HOST_ACTION_NONE: 4576 case IBMVFC_HOST_ACTION_INIT_WAIT: 4577 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4578 return 0; 4579 case IBMVFC_HOST_ACTION_TGT_INIT: 4580 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4581 if (vhost->discovery_threads == disc_threads) 4582 return 0; 4583 list_for_each_entry(tgt, &vhost->targets, queue) 4584 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 4585 return 1; 4586 list_for_each_entry(tgt, &vhost->targets, queue) 4587 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 4588 return 0; 4589 return 1; 4590 case IBMVFC_HOST_ACTION_TGT_DEL: 4591 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4592 if (vhost->discovery_threads == disc_threads) 4593 return 0; 4594 list_for_each_entry(tgt, &vhost->targets, queue) 4595 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) 4596 return 1; 4597 list_for_each_entry(tgt, &vhost->targets, queue) 4598 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) 4599 return 0; 4600 return 1; 4601 case IBMVFC_HOST_ACTION_LOGO: 4602 case IBMVFC_HOST_ACTION_INIT: 4603 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4604 case IBMVFC_HOST_ACTION_QUERY: 4605 case IBMVFC_HOST_ACTION_RESET: 4606 case IBMVFC_HOST_ACTION_REENABLE: 4607 default: 4608 break; 4609 } 4610 4611 return 1; 4612 } 4613 4614 /** 4615 * ibmvfc_work_to_do - Is there task level work to do? 4616 * @vhost: ibmvfc host struct 4617 * 4618 * Returns: 4619 * 1 if work to do / 0 if not 4620 **/ 4621 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 4622 { 4623 unsigned long flags; 4624 int rc; 4625 4626 spin_lock_irqsave(vhost->host->host_lock, flags); 4627 rc = __ibmvfc_work_to_do(vhost); 4628 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4629 return rc; 4630 } 4631 4632 /** 4633 * ibmvfc_log_ae - Log async events if necessary 4634 * @vhost: ibmvfc host struct 4635 * @events: events to log 4636 * 4637 **/ 4638 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 4639 { 4640 if (events & IBMVFC_AE_RSCN) 4641 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 4642 if ((events & IBMVFC_AE_LINKDOWN) && 4643 vhost->state >= IBMVFC_HALTED) 4644 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 4645 if ((events & IBMVFC_AE_LINKUP) && 4646 vhost->state == IBMVFC_INITIALIZING) 4647 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 4648 } 4649 4650 /** 4651 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 4652 * @tgt: ibmvfc target struct 4653 * 4654 **/ 4655 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 4656 { 4657 struct ibmvfc_host *vhost = tgt->vhost; 4658 struct fc_rport *rport; 4659 unsigned long flags; 4660 4661 tgt_dbg(tgt, "Adding rport\n"); 4662 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 4663 spin_lock_irqsave(vhost->host->host_lock, flags); 4664 4665 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4666 tgt_dbg(tgt, "Deleting rport\n"); 4667 list_del(&tgt->queue); 4668 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4669 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4670 fc_remote_port_delete(rport); 4671 del_timer_sync(&tgt->timer); 4672 kref_put(&tgt->kref, ibmvfc_release_tgt); 4673 return; 4674 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 4675 tgt_dbg(tgt, "Deleting rport with outstanding I/O\n"); 4676 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); 4677 tgt->rport = NULL; 4678 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4679 fc_remote_port_delete(rport); 4680 return; 4681 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 4682 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4683 return; 4684 } 4685 4686 if (rport) { 4687 tgt_dbg(tgt, "rport add succeeded\n"); 4688 tgt->rport = rport; 4689 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; 4690 rport->supported_classes = 0; 4691 tgt->target_id = rport->scsi_target_id; 4692 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) 4693 rport->supported_classes |= FC_COS_CLASS1; 4694 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) 4695 rport->supported_classes |= FC_COS_CLASS2; 4696 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) 4697 rport->supported_classes |= FC_COS_CLASS3; 4698 if (rport->rqst_q) 4699 blk_queue_max_segments(rport->rqst_q, 1); 4700 } else 4701 tgt_dbg(tgt, "rport add failed\n"); 4702 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4703 } 4704 4705 /** 4706 * ibmvfc_do_work - Do task level work 4707 * @vhost: ibmvfc host struct 4708 * 4709 **/ 4710 static void ibmvfc_do_work(struct ibmvfc_host *vhost) 4711 { 4712 struct ibmvfc_target *tgt; 4713 unsigned long flags; 4714 struct fc_rport *rport; 4715 int rc; 4716 4717 ibmvfc_log_ae(vhost, vhost->events_to_log); 4718 spin_lock_irqsave(vhost->host->host_lock, flags); 4719 vhost->events_to_log = 0; 4720 switch (vhost->action) { 4721 case IBMVFC_HOST_ACTION_NONE: 4722 case IBMVFC_HOST_ACTION_LOGO_WAIT: 4723 case IBMVFC_HOST_ACTION_INIT_WAIT: 4724 break; 4725 case IBMVFC_HOST_ACTION_RESET: 4726 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4727 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4728 rc = ibmvfc_reset_crq(vhost); 4729 spin_lock_irqsave(vhost->host->host_lock, flags); 4730 if (rc == H_CLOSED) 4731 vio_enable_interrupts(to_vio_dev(vhost->dev)); 4732 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 4733 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 4734 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4735 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 4736 } 4737 break; 4738 case IBMVFC_HOST_ACTION_REENABLE: 4739 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 4740 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4741 rc = ibmvfc_reenable_crq_queue(vhost); 4742 spin_lock_irqsave(vhost->host->host_lock, flags); 4743 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 4744 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4745 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 4746 } 4747 break; 4748 case IBMVFC_HOST_ACTION_LOGO: 4749 vhost->job_step(vhost); 4750 break; 4751 case IBMVFC_HOST_ACTION_INIT: 4752 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 4753 if (vhost->delay_init) { 4754 vhost->delay_init = 0; 4755 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4756 ssleep(15); 4757 return; 4758 } else 4759 vhost->job_step(vhost); 4760 break; 4761 case IBMVFC_HOST_ACTION_QUERY: 4762 list_for_each_entry(tgt, &vhost->targets, queue) 4763 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 4764 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 4765 break; 4766 case IBMVFC_HOST_ACTION_QUERY_TGTS: 4767 list_for_each_entry(tgt, &vhost->targets, queue) { 4768 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4769 tgt->job_step(tgt); 4770 break; 4771 } 4772 } 4773 4774 if (!ibmvfc_dev_init_to_do(vhost)) 4775 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 4776 break; 4777 case IBMVFC_HOST_ACTION_TGT_DEL: 4778 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 4779 list_for_each_entry(tgt, &vhost->targets, queue) { 4780 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { 4781 tgt->job_step(tgt); 4782 break; 4783 } 4784 } 4785 4786 if (ibmvfc_dev_logo_to_do(vhost)) { 4787 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4788 return; 4789 } 4790 4791 list_for_each_entry(tgt, &vhost->targets, queue) { 4792 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 4793 tgt_dbg(tgt, "Deleting rport\n"); 4794 rport = tgt->rport; 4795 tgt->rport = NULL; 4796 list_del(&tgt->queue); 4797 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 4798 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4799 if (rport) 4800 fc_remote_port_delete(rport); 4801 del_timer_sync(&tgt->timer); 4802 kref_put(&tgt->kref, ibmvfc_release_tgt); 4803 return; 4804 } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 4805 tgt_dbg(tgt, "Deleting rport with I/O outstanding\n"); 4806 rport = tgt->rport; 4807 tgt->rport = NULL; 4808 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); 4809 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4810 if (rport) 4811 fc_remote_port_delete(rport); 4812 return; 4813 } 4814 } 4815 4816 if (vhost->state == IBMVFC_INITIALIZING) { 4817 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 4818 if (vhost->reinit) { 4819 vhost->reinit = 0; 4820 scsi_block_requests(vhost->host); 4821 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4822 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4823 } else { 4824 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 4825 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4826 wake_up(&vhost->init_wait_q); 4827 schedule_work(&vhost->rport_add_work_q); 4828 vhost->init_retries = 0; 4829 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4830 scsi_unblock_requests(vhost->host); 4831 } 4832 4833 return; 4834 } else { 4835 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 4836 vhost->job_step = ibmvfc_discover_targets; 4837 } 4838 } else { 4839 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 4840 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4841 scsi_unblock_requests(vhost->host); 4842 wake_up(&vhost->init_wait_q); 4843 return; 4844 } 4845 break; 4846 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 4847 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 4848 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4849 ibmvfc_alloc_targets(vhost); 4850 spin_lock_irqsave(vhost->host->host_lock, flags); 4851 break; 4852 case IBMVFC_HOST_ACTION_TGT_INIT: 4853 list_for_each_entry(tgt, &vhost->targets, queue) { 4854 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 4855 tgt->job_step(tgt); 4856 break; 4857 } 4858 } 4859 4860 if (!ibmvfc_dev_init_to_do(vhost)) 4861 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 4862 break; 4863 default: 4864 break; 4865 } 4866 4867 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4868 } 4869 4870 /** 4871 * ibmvfc_work - Do task level work 4872 * @data: ibmvfc host struct 4873 * 4874 * Returns: 4875 * zero 4876 **/ 4877 static int ibmvfc_work(void *data) 4878 { 4879 struct ibmvfc_host *vhost = data; 4880 int rc; 4881 4882 set_user_nice(current, MIN_NICE); 4883 4884 while (1) { 4885 rc = wait_event_interruptible(vhost->work_wait_q, 4886 ibmvfc_work_to_do(vhost)); 4887 4888 BUG_ON(rc); 4889 4890 if (kthread_should_stop()) 4891 break; 4892 4893 ibmvfc_do_work(vhost); 4894 } 4895 4896 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 4897 return 0; 4898 } 4899 4900 /** 4901 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 4902 * @vhost: ibmvfc host struct 4903 * 4904 * Allocates a page for messages, maps it for dma, and registers 4905 * the crq with the hypervisor. 4906 * 4907 * Return value: 4908 * zero on success / other on failure 4909 **/ 4910 static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 4911 { 4912 int rc, retrc = -ENOMEM; 4913 struct device *dev = vhost->dev; 4914 struct vio_dev *vdev = to_vio_dev(dev); 4915 struct ibmvfc_crq_queue *crq = &vhost->crq; 4916 4917 ENTER; 4918 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 4919 4920 if (!crq->msgs) 4921 return -ENOMEM; 4922 4923 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4924 crq->msg_token = dma_map_single(dev, crq->msgs, 4925 PAGE_SIZE, DMA_BIDIRECTIONAL); 4926 4927 if (dma_mapping_error(dev, crq->msg_token)) 4928 goto map_failed; 4929 4930 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4931 crq->msg_token, PAGE_SIZE); 4932 4933 if (rc == H_RESOURCE) 4934 /* maybe kexecing and resource is busy. try a reset */ 4935 retrc = rc = ibmvfc_reset_crq(vhost); 4936 4937 if (rc == H_CLOSED) 4938 dev_warn(dev, "Partner adapter not ready\n"); 4939 else if (rc) { 4940 dev_warn(dev, "Error %d opening adapter\n", rc); 4941 goto reg_crq_failed; 4942 } 4943 4944 retrc = 0; 4945 4946 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 4947 4948 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 4949 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 4950 goto req_irq_failed; 4951 } 4952 4953 if ((rc = vio_enable_interrupts(vdev))) { 4954 dev_err(dev, "Error %d enabling interrupts\n", rc); 4955 goto req_irq_failed; 4956 } 4957 4958 crq->cur = 0; 4959 LEAVE; 4960 return retrc; 4961 4962 req_irq_failed: 4963 tasklet_kill(&vhost->tasklet); 4964 do { 4965 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4966 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4967 reg_crq_failed: 4968 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4969 map_failed: 4970 free_page((unsigned long)crq->msgs); 4971 return retrc; 4972 } 4973 4974 /** 4975 * ibmvfc_free_mem - Free memory for vhost 4976 * @vhost: ibmvfc host struct 4977 * 4978 * Return value: 4979 * none 4980 **/ 4981 static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 4982 { 4983 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 4984 4985 ENTER; 4986 mempool_destroy(vhost->tgt_pool); 4987 kfree(vhost->trace); 4988 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 4989 vhost->disc_buf_dma); 4990 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 4991 vhost->login_buf, vhost->login_buf_dma); 4992 dma_pool_destroy(vhost->sg_pool); 4993 dma_unmap_single(vhost->dev, async_q->msg_token, 4994 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4995 free_page((unsigned long)async_q->msgs); 4996 LEAVE; 4997 } 4998 4999 /** 5000 * ibmvfc_alloc_mem - Allocate memory for vhost 5001 * @vhost: ibmvfc host struct 5002 * 5003 * Return value: 5004 * 0 on success / non-zero on failure 5005 **/ 5006 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 5007 { 5008 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 5009 struct device *dev = vhost->dev; 5010 5011 ENTER; 5012 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 5013 if (!async_q->msgs) { 5014 dev_err(dev, "Couldn't allocate async queue.\n"); 5015 goto nomem; 5016 } 5017 5018 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 5019 async_q->msg_token = dma_map_single(dev, async_q->msgs, 5020 async_q->size * sizeof(*async_q->msgs), 5021 DMA_BIDIRECTIONAL); 5022 5023 if (dma_mapping_error(dev, async_q->msg_token)) { 5024 dev_err(dev, "Failed to map async queue\n"); 5025 goto free_async_crq; 5026 } 5027 5028 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 5029 SG_ALL * sizeof(struct srp_direct_buf), 5030 sizeof(struct srp_direct_buf), 0); 5031 5032 if (!vhost->sg_pool) { 5033 dev_err(dev, "Failed to allocate sg pool\n"); 5034 goto unmap_async_crq; 5035 } 5036 5037 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 5038 &vhost->login_buf_dma, GFP_KERNEL); 5039 5040 if (!vhost->login_buf) { 5041 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 5042 goto free_sg_pool; 5043 } 5044 5045 vhost->disc_buf_sz = sizeof(*vhost->disc_buf) * max_targets; 5046 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 5047 &vhost->disc_buf_dma, GFP_KERNEL); 5048 5049 if (!vhost->disc_buf) { 5050 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 5051 goto free_login_buffer; 5052 } 5053 5054 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 5055 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 5056 5057 if (!vhost->trace) 5058 goto free_disc_buffer; 5059 5060 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 5061 sizeof(struct ibmvfc_target)); 5062 5063 if (!vhost->tgt_pool) { 5064 dev_err(dev, "Couldn't allocate target memory pool\n"); 5065 goto free_trace; 5066 } 5067 5068 LEAVE; 5069 return 0; 5070 5071 free_trace: 5072 kfree(vhost->trace); 5073 free_disc_buffer: 5074 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 5075 vhost->disc_buf_dma); 5076 free_login_buffer: 5077 dma_free_coherent(dev, sizeof(*vhost->login_buf), 5078 vhost->login_buf, vhost->login_buf_dma); 5079 free_sg_pool: 5080 dma_pool_destroy(vhost->sg_pool); 5081 unmap_async_crq: 5082 dma_unmap_single(dev, async_q->msg_token, 5083 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 5084 free_async_crq: 5085 free_page((unsigned long)async_q->msgs); 5086 nomem: 5087 LEAVE; 5088 return -ENOMEM; 5089 } 5090 5091 /** 5092 * ibmvfc_rport_add_thread - Worker thread for rport adds 5093 * @work: work struct 5094 * 5095 **/ 5096 static void ibmvfc_rport_add_thread(struct work_struct *work) 5097 { 5098 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 5099 rport_add_work_q); 5100 struct ibmvfc_target *tgt; 5101 struct fc_rport *rport; 5102 unsigned long flags; 5103 int did_work; 5104 5105 ENTER; 5106 spin_lock_irqsave(vhost->host->host_lock, flags); 5107 do { 5108 did_work = 0; 5109 if (vhost->state != IBMVFC_ACTIVE) 5110 break; 5111 5112 list_for_each_entry(tgt, &vhost->targets, queue) { 5113 if (tgt->add_rport) { 5114 did_work = 1; 5115 tgt->add_rport = 0; 5116 kref_get(&tgt->kref); 5117 rport = tgt->rport; 5118 if (!rport) { 5119 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5120 ibmvfc_tgt_add_rport(tgt); 5121 } else if (get_device(&rport->dev)) { 5122 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5123 tgt_dbg(tgt, "Setting rport roles\n"); 5124 fc_remote_port_rolechg(rport, tgt->ids.roles); 5125 put_device(&rport->dev); 5126 } else { 5127 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5128 } 5129 5130 kref_put(&tgt->kref, ibmvfc_release_tgt); 5131 spin_lock_irqsave(vhost->host->host_lock, flags); 5132 break; 5133 } 5134 } 5135 } while(did_work); 5136 5137 if (vhost->state == IBMVFC_ACTIVE) 5138 vhost->scan_complete = 1; 5139 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5140 LEAVE; 5141 } 5142 5143 /** 5144 * ibmvfc_probe - Adapter hot plug add entry point 5145 * @vdev: vio device struct 5146 * @id: vio device id struct 5147 * 5148 * Return value: 5149 * 0 on success / non-zero on failure 5150 **/ 5151 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 5152 { 5153 struct ibmvfc_host *vhost; 5154 struct Scsi_Host *shost; 5155 struct device *dev = &vdev->dev; 5156 int rc = -ENOMEM; 5157 5158 ENTER; 5159 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 5160 if (!shost) { 5161 dev_err(dev, "Couldn't allocate host data\n"); 5162 goto out; 5163 } 5164 5165 shost->transportt = ibmvfc_transport_template; 5166 shost->can_queue = max_requests; 5167 shost->max_lun = max_lun; 5168 shost->max_id = max_targets; 5169 shost->max_sectors = IBMVFC_MAX_SECTORS; 5170 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 5171 shost->unique_id = shost->host_no; 5172 5173 vhost = shost_priv(shost); 5174 INIT_LIST_HEAD(&vhost->sent); 5175 INIT_LIST_HEAD(&vhost->free); 5176 INIT_LIST_HEAD(&vhost->targets); 5177 sprintf(vhost->name, IBMVFC_NAME); 5178 vhost->host = shost; 5179 vhost->dev = dev; 5180 vhost->partition_number = -1; 5181 vhost->log_level = log_level; 5182 vhost->task_set = 1; 5183 strcpy(vhost->partition_name, "UNKNOWN"); 5184 init_waitqueue_head(&vhost->work_wait_q); 5185 init_waitqueue_head(&vhost->init_wait_q); 5186 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 5187 mutex_init(&vhost->passthru_mutex); 5188 5189 if ((rc = ibmvfc_alloc_mem(vhost))) 5190 goto free_scsi_host; 5191 5192 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 5193 shost->host_no); 5194 5195 if (IS_ERR(vhost->work_thread)) { 5196 dev_err(dev, "Couldn't create kernel thread: %ld\n", 5197 PTR_ERR(vhost->work_thread)); 5198 rc = PTR_ERR(vhost->work_thread); 5199 goto free_host_mem; 5200 } 5201 5202 if ((rc = ibmvfc_init_crq(vhost))) { 5203 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 5204 goto kill_kthread; 5205 } 5206 5207 if ((rc = ibmvfc_init_event_pool(vhost))) { 5208 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 5209 goto release_crq; 5210 } 5211 5212 if ((rc = scsi_add_host(shost, dev))) 5213 goto release_event_pool; 5214 5215 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 5216 5217 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 5218 &ibmvfc_trace_attr))) { 5219 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 5220 goto remove_shost; 5221 } 5222 5223 if (shost_to_fc_host(shost)->rqst_q) 5224 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 5225 dev_set_drvdata(dev, vhost); 5226 spin_lock(&ibmvfc_driver_lock); 5227 list_add_tail(&vhost->queue, &ibmvfc_head); 5228 spin_unlock(&ibmvfc_driver_lock); 5229 5230 ibmvfc_send_crq_init(vhost); 5231 scsi_scan_host(shost); 5232 return 0; 5233 5234 remove_shost: 5235 scsi_remove_host(shost); 5236 release_event_pool: 5237 ibmvfc_free_event_pool(vhost); 5238 release_crq: 5239 ibmvfc_release_crq_queue(vhost); 5240 kill_kthread: 5241 kthread_stop(vhost->work_thread); 5242 free_host_mem: 5243 ibmvfc_free_mem(vhost); 5244 free_scsi_host: 5245 scsi_host_put(shost); 5246 out: 5247 LEAVE; 5248 return rc; 5249 } 5250 5251 /** 5252 * ibmvfc_remove - Adapter hot plug remove entry point 5253 * @vdev: vio device struct 5254 * 5255 * Return value: 5256 * 0 5257 **/ 5258 static int ibmvfc_remove(struct vio_dev *vdev) 5259 { 5260 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 5261 unsigned long flags; 5262 5263 ENTER; 5264 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 5265 5266 spin_lock_irqsave(vhost->host->host_lock, flags); 5267 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 5268 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5269 5270 ibmvfc_wait_while_resetting(vhost); 5271 ibmvfc_release_crq_queue(vhost); 5272 kthread_stop(vhost->work_thread); 5273 fc_remove_host(vhost->host); 5274 scsi_remove_host(vhost->host); 5275 5276 spin_lock_irqsave(vhost->host->host_lock, flags); 5277 ibmvfc_purge_requests(vhost, DID_ERROR); 5278 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5279 ibmvfc_free_event_pool(vhost); 5280 5281 ibmvfc_free_mem(vhost); 5282 spin_lock(&ibmvfc_driver_lock); 5283 list_del(&vhost->queue); 5284 spin_unlock(&ibmvfc_driver_lock); 5285 scsi_host_put(vhost->host); 5286 LEAVE; 5287 return 0; 5288 } 5289 5290 /** 5291 * ibmvfc_resume - Resume from suspend 5292 * @dev: device struct 5293 * 5294 * We may have lost an interrupt across suspend/resume, so kick the 5295 * interrupt handler 5296 * 5297 */ 5298 static int ibmvfc_resume(struct device *dev) 5299 { 5300 unsigned long flags; 5301 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 5302 struct vio_dev *vdev = to_vio_dev(dev); 5303 5304 spin_lock_irqsave(vhost->host->host_lock, flags); 5305 vio_disable_interrupts(vdev); 5306 tasklet_schedule(&vhost->tasklet); 5307 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5308 return 0; 5309 } 5310 5311 /** 5312 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 5313 * @vdev: vio device struct 5314 * 5315 * Return value: 5316 * Number of bytes the driver will need to DMA map at the same time in 5317 * order to perform well. 5318 */ 5319 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 5320 { 5321 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 5322 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 5323 } 5324 5325 static const struct vio_device_id ibmvfc_device_table[] = { 5326 {"fcp", "IBM,vfc-client"}, 5327 { "", "" } 5328 }; 5329 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 5330 5331 static const struct dev_pm_ops ibmvfc_pm_ops = { 5332 .resume = ibmvfc_resume 5333 }; 5334 5335 static struct vio_driver ibmvfc_driver = { 5336 .id_table = ibmvfc_device_table, 5337 .probe = ibmvfc_probe, 5338 .remove = ibmvfc_remove, 5339 .get_desired_dma = ibmvfc_get_desired_dma, 5340 .name = IBMVFC_NAME, 5341 .pm = &ibmvfc_pm_ops, 5342 }; 5343 5344 static struct fc_function_template ibmvfc_transport_functions = { 5345 .show_host_fabric_name = 1, 5346 .show_host_node_name = 1, 5347 .show_host_port_name = 1, 5348 .show_host_supported_classes = 1, 5349 .show_host_port_type = 1, 5350 .show_host_port_id = 1, 5351 .show_host_maxframe_size = 1, 5352 5353 .get_host_port_state = ibmvfc_get_host_port_state, 5354 .show_host_port_state = 1, 5355 5356 .get_host_speed = ibmvfc_get_host_speed, 5357 .show_host_speed = 1, 5358 5359 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 5360 .terminate_rport_io = ibmvfc_terminate_rport_io, 5361 5362 .show_rport_maxframe_size = 1, 5363 .show_rport_supported_classes = 1, 5364 5365 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 5366 .show_rport_dev_loss_tmo = 1, 5367 5368 .get_starget_node_name = ibmvfc_get_starget_node_name, 5369 .show_starget_node_name = 1, 5370 5371 .get_starget_port_name = ibmvfc_get_starget_port_name, 5372 .show_starget_port_name = 1, 5373 5374 .get_starget_port_id = ibmvfc_get_starget_port_id, 5375 .show_starget_port_id = 1, 5376 5377 .bsg_request = ibmvfc_bsg_request, 5378 .bsg_timeout = ibmvfc_bsg_timeout, 5379 }; 5380 5381 /** 5382 * ibmvfc_module_init - Initialize the ibmvfc module 5383 * 5384 * Return value: 5385 * 0 on success / other on failure 5386 **/ 5387 static int __init ibmvfc_module_init(void) 5388 { 5389 int rc; 5390 5391 if (!firmware_has_feature(FW_FEATURE_VIO)) 5392 return -ENODEV; 5393 5394 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 5395 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 5396 5397 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 5398 if (!ibmvfc_transport_template) 5399 return -ENOMEM; 5400 5401 rc = vio_register_driver(&ibmvfc_driver); 5402 if (rc) 5403 fc_release_transport(ibmvfc_transport_template); 5404 return rc; 5405 } 5406 5407 /** 5408 * ibmvfc_module_exit - Teardown the ibmvfc module 5409 * 5410 * Return value: 5411 * nothing 5412 **/ 5413 static void __exit ibmvfc_module_exit(void) 5414 { 5415 vio_unregister_driver(&ibmvfc_driver); 5416 fc_release_transport(ibmvfc_transport_template); 5417 } 5418 5419 module_init(ibmvfc_module_init); 5420 module_exit(ibmvfc_module_exit); 5421