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/irqdomain.h> 17 #include <linux/kthread.h> 18 #include <linux/slab.h> 19 #include <linux/of.h> 20 #include <linux/pm.h> 21 #include <linux/stringify.h> 22 #include <linux/bsg-lib.h> 23 #include <asm/firmware.h> 24 #include <asm/irq.h> 25 #include <asm/rtas.h> 26 #include <asm/vio.h> 27 #include <scsi/scsi.h> 28 #include <scsi/scsi_cmnd.h> 29 #include <scsi/scsi_host.h> 30 #include <scsi/scsi_device.h> 31 #include <scsi/scsi_tcq.h> 32 #include <scsi/scsi_transport_fc.h> 33 #include <scsi/scsi_bsg_fc.h> 34 #include "ibmvfc.h" 35 36 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 37 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 38 static u64 max_lun = IBMVFC_MAX_LUN; 39 static unsigned int max_targets = IBMVFC_MAX_TARGETS; 40 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 41 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 42 static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 43 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 44 static unsigned int cls3_error = IBMVFC_CLS3_ERROR; 45 static unsigned int mq_enabled = IBMVFC_MQ; 46 static unsigned int nr_scsi_hw_queues = IBMVFC_SCSI_HW_QUEUES; 47 static unsigned int nr_scsi_channels = IBMVFC_SCSI_CHANNELS; 48 static unsigned int mig_channels_only = IBMVFC_MIG_NO_SUB_TO_CRQ; 49 static unsigned int mig_no_less_channels = IBMVFC_MIG_NO_N_TO_M; 50 51 static LIST_HEAD(ibmvfc_head); 52 static DEFINE_SPINLOCK(ibmvfc_driver_lock); 53 static struct scsi_transport_template *ibmvfc_transport_template; 54 55 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 56 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 57 MODULE_LICENSE("GPL"); 58 MODULE_VERSION(IBMVFC_DRIVER_VERSION); 59 60 module_param_named(mq, mq_enabled, uint, S_IRUGO); 61 MODULE_PARM_DESC(mq, "Enable multiqueue support. " 62 "[Default=" __stringify(IBMVFC_MQ) "]"); 63 module_param_named(scsi_host_queues, nr_scsi_hw_queues, uint, S_IRUGO); 64 MODULE_PARM_DESC(scsi_host_queues, "Number of SCSI Host submission queues. " 65 "[Default=" __stringify(IBMVFC_SCSI_HW_QUEUES) "]"); 66 module_param_named(scsi_hw_channels, nr_scsi_channels, uint, S_IRUGO); 67 MODULE_PARM_DESC(scsi_hw_channels, "Number of hw scsi channels to request. " 68 "[Default=" __stringify(IBMVFC_SCSI_CHANNELS) "]"); 69 module_param_named(mig_channels_only, mig_channels_only, uint, S_IRUGO); 70 MODULE_PARM_DESC(mig_channels_only, "Prevent migration to non-channelized system. " 71 "[Default=" __stringify(IBMVFC_MIG_NO_SUB_TO_CRQ) "]"); 72 module_param_named(mig_no_less_channels, mig_no_less_channels, uint, S_IRUGO); 73 MODULE_PARM_DESC(mig_no_less_channels, "Prevent migration to system with less channels. " 74 "[Default=" __stringify(IBMVFC_MIG_NO_N_TO_M) "]"); 75 76 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 77 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 78 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 79 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 80 MODULE_PARM_DESC(default_timeout, 81 "Default timeout in seconds for initialization and EH commands. " 82 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 83 module_param_named(max_requests, max_requests, uint, S_IRUGO); 84 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 85 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 86 module_param_named(max_lun, max_lun, ullong, S_IRUGO); 87 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 88 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 89 module_param_named(max_targets, max_targets, uint, S_IRUGO); 90 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 91 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 92 module_param_named(disc_threads, disc_threads, uint, S_IRUGO); 93 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 94 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 95 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 96 MODULE_PARM_DESC(debug, "Enable driver debug information. " 97 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 98 module_param_named(log_level, log_level, uint, 0); 99 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 100 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 101 module_param_named(cls3_error, cls3_error, uint, 0); 102 MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. " 103 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]"); 104 105 static const struct { 106 u16 status; 107 u16 error; 108 u8 result; 109 u8 retry; 110 int log; 111 char *name; 112 } cmd_status [] = { 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 115 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 116 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 117 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 118 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 119 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 120 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 121 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 122 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 123 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 124 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 125 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 126 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 127 128 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 129 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 130 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 131 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 132 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 133 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 134 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 135 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 136 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 137 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 138 139 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 140 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 141 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 142 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 143 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 144 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 145 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 146 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 147 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 148 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 149 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 150 151 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 152 { IBMVFC_FC_SCSI_ERROR, IBMVFC_COMMAND_FAILED, DID_ERROR, 0, 1, "PRLI to device failed." }, 153 }; 154 155 static void ibmvfc_npiv_login(struct ibmvfc_host *); 156 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 157 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 158 static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 159 static void ibmvfc_npiv_logout(struct ibmvfc_host *); 160 static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *); 161 static void ibmvfc_tgt_move_login(struct ibmvfc_target *); 162 163 static void ibmvfc_dereg_sub_crqs(struct ibmvfc_host *); 164 static void ibmvfc_reg_sub_crqs(struct ibmvfc_host *); 165 166 static const char *unknown_error = "unknown error"; 167 168 static long h_reg_sub_crq(unsigned long unit_address, unsigned long ioba, 169 unsigned long length, unsigned long *cookie, 170 unsigned long *irq) 171 { 172 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 173 long rc; 174 175 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, ioba, length); 176 *cookie = retbuf[0]; 177 *irq = retbuf[1]; 178 179 return rc; 180 } 181 182 static int ibmvfc_check_caps(struct ibmvfc_host *vhost, unsigned long cap_flags) 183 { 184 u64 host_caps = be64_to_cpu(vhost->login_buf->resp.capabilities); 185 186 return (host_caps & cap_flags) ? 1 : 0; 187 } 188 189 static struct ibmvfc_fcp_cmd_iu *ibmvfc_get_fcp_iu(struct ibmvfc_host *vhost, 190 struct ibmvfc_cmd *vfc_cmd) 191 { 192 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 193 return &vfc_cmd->v2.iu; 194 else 195 return &vfc_cmd->v1.iu; 196 } 197 198 static struct ibmvfc_fcp_rsp *ibmvfc_get_fcp_rsp(struct ibmvfc_host *vhost, 199 struct ibmvfc_cmd *vfc_cmd) 200 { 201 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 202 return &vfc_cmd->v2.rsp; 203 else 204 return &vfc_cmd->v1.rsp; 205 } 206 207 #ifdef CONFIG_SCSI_IBMVFC_TRACE 208 /** 209 * ibmvfc_trc_start - Log a start trace entry 210 * @evt: ibmvfc event struct 211 * 212 **/ 213 static void ibmvfc_trc_start(struct ibmvfc_event *evt) 214 { 215 struct ibmvfc_host *vhost = evt->vhost; 216 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 217 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 218 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 219 struct ibmvfc_trace_entry *entry; 220 int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK; 221 222 entry = &vhost->trace[index]; 223 entry->evt = evt; 224 entry->time = jiffies; 225 entry->fmt = evt->crq.format; 226 entry->type = IBMVFC_TRC_START; 227 228 switch (entry->fmt) { 229 case IBMVFC_CMD_FORMAT: 230 entry->op_code = iu->cdb[0]; 231 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 232 entry->lun = scsilun_to_int(&iu->lun); 233 entry->tmf_flags = iu->tmf_flags; 234 entry->u.start.xfer_len = be32_to_cpu(iu->xfer_len); 235 break; 236 case IBMVFC_MAD_FORMAT: 237 entry->op_code = be32_to_cpu(mad->opcode); 238 break; 239 default: 240 break; 241 } 242 } 243 244 /** 245 * ibmvfc_trc_end - Log an end trace entry 246 * @evt: ibmvfc event struct 247 * 248 **/ 249 static void ibmvfc_trc_end(struct ibmvfc_event *evt) 250 { 251 struct ibmvfc_host *vhost = evt->vhost; 252 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 253 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 254 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 255 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 256 struct ibmvfc_trace_entry *entry; 257 int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK; 258 259 entry = &vhost->trace[index]; 260 entry->evt = evt; 261 entry->time = jiffies; 262 entry->fmt = evt->crq.format; 263 entry->type = IBMVFC_TRC_END; 264 265 switch (entry->fmt) { 266 case IBMVFC_CMD_FORMAT: 267 entry->op_code = iu->cdb[0]; 268 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 269 entry->lun = scsilun_to_int(&iu->lun); 270 entry->tmf_flags = iu->tmf_flags; 271 entry->u.end.status = be16_to_cpu(vfc_cmd->status); 272 entry->u.end.error = be16_to_cpu(vfc_cmd->error); 273 entry->u.end.fcp_rsp_flags = rsp->flags; 274 entry->u.end.rsp_code = rsp->data.info.rsp_code; 275 entry->u.end.scsi_status = rsp->scsi_status; 276 break; 277 case IBMVFC_MAD_FORMAT: 278 entry->op_code = be32_to_cpu(mad->opcode); 279 entry->u.end.status = be16_to_cpu(mad->status); 280 break; 281 default: 282 break; 283 284 } 285 } 286 287 #else 288 #define ibmvfc_trc_start(evt) do { } while (0) 289 #define ibmvfc_trc_end(evt) do { } while (0) 290 #endif 291 292 /** 293 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 294 * @status: status / error class 295 * @error: error 296 * 297 * Return value: 298 * index into cmd_status / -EINVAL on failure 299 **/ 300 static int ibmvfc_get_err_index(u16 status, u16 error) 301 { 302 int i; 303 304 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 305 if ((cmd_status[i].status & status) == cmd_status[i].status && 306 cmd_status[i].error == error) 307 return i; 308 309 return -EINVAL; 310 } 311 312 /** 313 * ibmvfc_get_cmd_error - Find the error description for the fcp response 314 * @status: status / error class 315 * @error: error 316 * 317 * Return value: 318 * error description string 319 **/ 320 static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 321 { 322 int rc = ibmvfc_get_err_index(status, error); 323 if (rc >= 0) 324 return cmd_status[rc].name; 325 return unknown_error; 326 } 327 328 /** 329 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 330 * @vhost: ibmvfc host struct 331 * @vfc_cmd: ibmvfc command struct 332 * 333 * Return value: 334 * SCSI result value to return for completed command 335 **/ 336 static int ibmvfc_get_err_result(struct ibmvfc_host *vhost, struct ibmvfc_cmd *vfc_cmd) 337 { 338 int err; 339 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 340 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 341 342 if ((rsp->flags & FCP_RSP_LEN_VALID) && 343 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 344 rsp->data.info.rsp_code)) 345 return DID_ERROR << 16; 346 347 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 348 if (err >= 0) 349 return rsp->scsi_status | (cmd_status[err].result << 16); 350 return rsp->scsi_status | (DID_ERROR << 16); 351 } 352 353 /** 354 * ibmvfc_retry_cmd - Determine if error status is retryable 355 * @status: status / error class 356 * @error: error 357 * 358 * Return value: 359 * 1 if error should be retried / 0 if it should not 360 **/ 361 static int ibmvfc_retry_cmd(u16 status, u16 error) 362 { 363 int rc = ibmvfc_get_err_index(status, error); 364 365 if (rc >= 0) 366 return cmd_status[rc].retry; 367 return 1; 368 } 369 370 static const char *unknown_fc_explain = "unknown fc explain"; 371 372 static const struct { 373 u16 fc_explain; 374 char *name; 375 } ls_explain [] = { 376 { 0x00, "no additional explanation" }, 377 { 0x01, "service parameter error - options" }, 378 { 0x03, "service parameter error - initiator control" }, 379 { 0x05, "service parameter error - recipient control" }, 380 { 0x07, "service parameter error - received data field size" }, 381 { 0x09, "service parameter error - concurrent seq" }, 382 { 0x0B, "service parameter error - credit" }, 383 { 0x0D, "invalid N_Port/F_Port_Name" }, 384 { 0x0E, "invalid node/Fabric Name" }, 385 { 0x0F, "invalid common service parameters" }, 386 { 0x11, "invalid association header" }, 387 { 0x13, "association header required" }, 388 { 0x15, "invalid originator S_ID" }, 389 { 0x17, "invalid OX_ID-RX-ID combination" }, 390 { 0x19, "command (request) already in progress" }, 391 { 0x1E, "N_Port Login requested" }, 392 { 0x1F, "Invalid N_Port_ID" }, 393 }; 394 395 static const struct { 396 u16 fc_explain; 397 char *name; 398 } gs_explain [] = { 399 { 0x00, "no additional explanation" }, 400 { 0x01, "port identifier not registered" }, 401 { 0x02, "port name not registered" }, 402 { 0x03, "node name not registered" }, 403 { 0x04, "class of service not registered" }, 404 { 0x06, "initial process associator not registered" }, 405 { 0x07, "FC-4 TYPEs not registered" }, 406 { 0x08, "symbolic port name not registered" }, 407 { 0x09, "symbolic node name not registered" }, 408 { 0x0A, "port type not registered" }, 409 { 0xF0, "authorization exception" }, 410 { 0xF1, "authentication exception" }, 411 { 0xF2, "data base full" }, 412 { 0xF3, "data base empty" }, 413 { 0xF4, "processing request" }, 414 { 0xF5, "unable to verify connection" }, 415 { 0xF6, "devices not in a common zone" }, 416 }; 417 418 /** 419 * ibmvfc_get_ls_explain - Return the FC Explain description text 420 * @status: FC Explain status 421 * 422 * Returns: 423 * error string 424 **/ 425 static const char *ibmvfc_get_ls_explain(u16 status) 426 { 427 int i; 428 429 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 430 if (ls_explain[i].fc_explain == status) 431 return ls_explain[i].name; 432 433 return unknown_fc_explain; 434 } 435 436 /** 437 * ibmvfc_get_gs_explain - Return the FC Explain description text 438 * @status: FC Explain status 439 * 440 * Returns: 441 * error string 442 **/ 443 static const char *ibmvfc_get_gs_explain(u16 status) 444 { 445 int i; 446 447 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 448 if (gs_explain[i].fc_explain == status) 449 return gs_explain[i].name; 450 451 return unknown_fc_explain; 452 } 453 454 static const struct { 455 enum ibmvfc_fc_type fc_type; 456 char *name; 457 } fc_type [] = { 458 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 459 { IBMVFC_PORT_REJECT, "port reject" }, 460 { IBMVFC_LS_REJECT, "ELS reject" }, 461 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 462 { IBMVFC_PORT_BUSY, "port busy" }, 463 { IBMVFC_BASIC_REJECT, "basic reject" }, 464 }; 465 466 static const char *unknown_fc_type = "unknown fc type"; 467 468 /** 469 * ibmvfc_get_fc_type - Return the FC Type description text 470 * @status: FC Type error status 471 * 472 * Returns: 473 * error string 474 **/ 475 static const char *ibmvfc_get_fc_type(u16 status) 476 { 477 int i; 478 479 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 480 if (fc_type[i].fc_type == status) 481 return fc_type[i].name; 482 483 return unknown_fc_type; 484 } 485 486 /** 487 * ibmvfc_set_tgt_action - Set the next init action for the target 488 * @tgt: ibmvfc target struct 489 * @action: action to perform 490 * 491 * Returns: 492 * 0 if action changed / non-zero if not changed 493 **/ 494 static int ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 495 enum ibmvfc_target_action action) 496 { 497 int rc = -EINVAL; 498 499 switch (tgt->action) { 500 case IBMVFC_TGT_ACTION_LOGOUT_RPORT: 501 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT || 502 action == IBMVFC_TGT_ACTION_DEL_RPORT) { 503 tgt->action = action; 504 rc = 0; 505 } 506 break; 507 case IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT: 508 if (action == IBMVFC_TGT_ACTION_DEL_RPORT || 509 action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 510 tgt->action = action; 511 rc = 0; 512 } 513 break; 514 case IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT: 515 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { 516 tgt->action = action; 517 rc = 0; 518 } 519 break; 520 case IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT: 521 if (action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 522 tgt->action = action; 523 rc = 0; 524 } 525 break; 526 case IBMVFC_TGT_ACTION_DEL_RPORT: 527 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 528 tgt->action = action; 529 rc = 0; 530 } 531 break; 532 case IBMVFC_TGT_ACTION_DELETED_RPORT: 533 break; 534 default: 535 tgt->action = action; 536 rc = 0; 537 break; 538 } 539 540 if (action >= IBMVFC_TGT_ACTION_LOGOUT_RPORT) 541 tgt->add_rport = 0; 542 543 return rc; 544 } 545 546 /** 547 * ibmvfc_set_host_state - Set the state for the host 548 * @vhost: ibmvfc host struct 549 * @state: state to set host to 550 * 551 * Returns: 552 * 0 if state changed / non-zero if not changed 553 **/ 554 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 555 enum ibmvfc_host_state state) 556 { 557 int rc = 0; 558 559 switch (vhost->state) { 560 case IBMVFC_HOST_OFFLINE: 561 rc = -EINVAL; 562 break; 563 default: 564 vhost->state = state; 565 break; 566 } 567 568 return rc; 569 } 570 571 /** 572 * ibmvfc_set_host_action - Set the next init action for the host 573 * @vhost: ibmvfc host struct 574 * @action: action to perform 575 * 576 **/ 577 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 578 enum ibmvfc_host_action action) 579 { 580 switch (action) { 581 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 582 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 583 vhost->action = action; 584 break; 585 case IBMVFC_HOST_ACTION_LOGO_WAIT: 586 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 587 vhost->action = action; 588 break; 589 case IBMVFC_HOST_ACTION_INIT_WAIT: 590 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 591 vhost->action = action; 592 break; 593 case IBMVFC_HOST_ACTION_QUERY: 594 switch (vhost->action) { 595 case IBMVFC_HOST_ACTION_INIT_WAIT: 596 case IBMVFC_HOST_ACTION_NONE: 597 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 598 vhost->action = action; 599 break; 600 default: 601 break; 602 } 603 break; 604 case IBMVFC_HOST_ACTION_TGT_INIT: 605 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 606 vhost->action = action; 607 break; 608 case IBMVFC_HOST_ACTION_REENABLE: 609 case IBMVFC_HOST_ACTION_RESET: 610 vhost->action = action; 611 break; 612 case IBMVFC_HOST_ACTION_INIT: 613 case IBMVFC_HOST_ACTION_TGT_DEL: 614 case IBMVFC_HOST_ACTION_LOGO: 615 case IBMVFC_HOST_ACTION_QUERY_TGTS: 616 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 617 case IBMVFC_HOST_ACTION_NONE: 618 default: 619 switch (vhost->action) { 620 case IBMVFC_HOST_ACTION_RESET: 621 case IBMVFC_HOST_ACTION_REENABLE: 622 break; 623 default: 624 vhost->action = action; 625 break; 626 } 627 break; 628 } 629 } 630 631 /** 632 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 633 * @vhost: ibmvfc host struct 634 * 635 * Return value: 636 * nothing 637 **/ 638 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 639 { 640 if (vhost->action == IBMVFC_HOST_ACTION_NONE && 641 vhost->state == IBMVFC_ACTIVE) { 642 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 643 scsi_block_requests(vhost->host); 644 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 645 } 646 } else 647 vhost->reinit = 1; 648 649 wake_up(&vhost->work_wait_q); 650 } 651 652 /** 653 * ibmvfc_del_tgt - Schedule cleanup and removal of the target 654 * @tgt: ibmvfc target struct 655 **/ 656 static void ibmvfc_del_tgt(struct ibmvfc_target *tgt) 657 { 658 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT)) { 659 tgt->job_step = ibmvfc_tgt_implicit_logout_and_del; 660 tgt->init_retries = 0; 661 } 662 wake_up(&tgt->vhost->work_wait_q); 663 } 664 665 /** 666 * ibmvfc_link_down - Handle a link down event from the adapter 667 * @vhost: ibmvfc host struct 668 * @state: ibmvfc host state to enter 669 * 670 **/ 671 static void ibmvfc_link_down(struct ibmvfc_host *vhost, 672 enum ibmvfc_host_state state) 673 { 674 struct ibmvfc_target *tgt; 675 676 ENTER; 677 scsi_block_requests(vhost->host); 678 list_for_each_entry(tgt, &vhost->targets, queue) 679 ibmvfc_del_tgt(tgt); 680 ibmvfc_set_host_state(vhost, state); 681 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 682 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 683 wake_up(&vhost->work_wait_q); 684 LEAVE; 685 } 686 687 /** 688 * ibmvfc_init_host - Start host initialization 689 * @vhost: ibmvfc host struct 690 * 691 * Return value: 692 * nothing 693 **/ 694 static void ibmvfc_init_host(struct ibmvfc_host *vhost) 695 { 696 struct ibmvfc_target *tgt; 697 698 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 699 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 700 dev_err(vhost->dev, 701 "Host initialization retries exceeded. Taking adapter offline\n"); 702 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 703 return; 704 } 705 } 706 707 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 708 memset(vhost->async_crq.msgs.async, 0, PAGE_SIZE); 709 vhost->async_crq.cur = 0; 710 711 list_for_each_entry(tgt, &vhost->targets, queue) { 712 if (vhost->client_migrated) 713 tgt->need_login = 1; 714 else 715 ibmvfc_del_tgt(tgt); 716 } 717 718 scsi_block_requests(vhost->host); 719 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 720 vhost->job_step = ibmvfc_npiv_login; 721 wake_up(&vhost->work_wait_q); 722 } 723 } 724 725 /** 726 * ibmvfc_send_crq - Send a CRQ 727 * @vhost: ibmvfc host struct 728 * @word1: the first 64 bits of the data 729 * @word2: the second 64 bits of the data 730 * 731 * Return value: 732 * 0 on success / other on failure 733 **/ 734 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 735 { 736 struct vio_dev *vdev = to_vio_dev(vhost->dev); 737 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 738 } 739 740 static int ibmvfc_send_sub_crq(struct ibmvfc_host *vhost, u64 cookie, u64 word1, 741 u64 word2, u64 word3, u64 word4) 742 { 743 struct vio_dev *vdev = to_vio_dev(vhost->dev); 744 745 return plpar_hcall_norets(H_SEND_SUB_CRQ, vdev->unit_address, cookie, 746 word1, word2, word3, word4); 747 } 748 749 /** 750 * ibmvfc_send_crq_init - Send a CRQ init message 751 * @vhost: ibmvfc host struct 752 * 753 * Return value: 754 * 0 on success / other on failure 755 **/ 756 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 757 { 758 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 759 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 760 } 761 762 /** 763 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 764 * @vhost: ibmvfc host struct 765 * 766 * Return value: 767 * 0 on success / other on failure 768 **/ 769 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 770 { 771 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 772 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 773 } 774 775 /** 776 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 777 * @vhost: ibmvfc host who owns the event pool 778 * @queue: ibmvfc queue struct 779 * @size: pool size 780 * 781 * Returns zero on success. 782 **/ 783 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost, 784 struct ibmvfc_queue *queue, 785 unsigned int size) 786 { 787 int i; 788 struct ibmvfc_event_pool *pool = &queue->evt_pool; 789 790 ENTER; 791 if (!size) 792 return 0; 793 794 pool->size = size; 795 pool->events = kcalloc(size, sizeof(*pool->events), GFP_KERNEL); 796 if (!pool->events) 797 return -ENOMEM; 798 799 pool->iu_storage = dma_alloc_coherent(vhost->dev, 800 size * sizeof(*pool->iu_storage), 801 &pool->iu_token, 0); 802 803 if (!pool->iu_storage) { 804 kfree(pool->events); 805 return -ENOMEM; 806 } 807 808 INIT_LIST_HEAD(&queue->sent); 809 INIT_LIST_HEAD(&queue->free); 810 spin_lock_init(&queue->l_lock); 811 812 for (i = 0; i < size; ++i) { 813 struct ibmvfc_event *evt = &pool->events[i]; 814 815 /* 816 * evt->active states 817 * 1 = in flight 818 * 0 = being completed 819 * -1 = free/freed 820 */ 821 atomic_set(&evt->active, -1); 822 atomic_set(&evt->free, 1); 823 evt->crq.valid = 0x80; 824 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i)); 825 evt->xfer_iu = pool->iu_storage + i; 826 evt->vhost = vhost; 827 evt->queue = queue; 828 evt->ext_list = NULL; 829 list_add_tail(&evt->queue_list, &queue->free); 830 } 831 832 LEAVE; 833 return 0; 834 } 835 836 /** 837 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 838 * @vhost: ibmvfc host who owns the event pool 839 * @queue: ibmvfc queue struct 840 * 841 **/ 842 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost, 843 struct ibmvfc_queue *queue) 844 { 845 int i; 846 struct ibmvfc_event_pool *pool = &queue->evt_pool; 847 848 ENTER; 849 for (i = 0; i < pool->size; ++i) { 850 list_del(&pool->events[i].queue_list); 851 BUG_ON(atomic_read(&pool->events[i].free) != 1); 852 if (pool->events[i].ext_list) 853 dma_pool_free(vhost->sg_pool, 854 pool->events[i].ext_list, 855 pool->events[i].ext_list_token); 856 } 857 858 kfree(pool->events); 859 dma_free_coherent(vhost->dev, 860 pool->size * sizeof(*pool->iu_storage), 861 pool->iu_storage, pool->iu_token); 862 LEAVE; 863 } 864 865 /** 866 * ibmvfc_free_queue - Deallocate queue 867 * @vhost: ibmvfc host struct 868 * @queue: ibmvfc queue struct 869 * 870 * Unmaps dma and deallocates page for messages 871 **/ 872 static void ibmvfc_free_queue(struct ibmvfc_host *vhost, 873 struct ibmvfc_queue *queue) 874 { 875 struct device *dev = vhost->dev; 876 877 dma_unmap_single(dev, queue->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 878 free_page((unsigned long)queue->msgs.handle); 879 queue->msgs.handle = NULL; 880 881 ibmvfc_free_event_pool(vhost, queue); 882 } 883 884 /** 885 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 886 * @vhost: ibmvfc host struct 887 * 888 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 889 * the crq with the hypervisor. 890 **/ 891 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 892 { 893 long rc = 0; 894 struct vio_dev *vdev = to_vio_dev(vhost->dev); 895 struct ibmvfc_queue *crq = &vhost->crq; 896 897 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 898 free_irq(vdev->irq, vhost); 899 tasklet_kill(&vhost->tasklet); 900 do { 901 if (rc) 902 msleep(100); 903 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 904 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 905 906 vhost->state = IBMVFC_NO_CRQ; 907 vhost->logged_in = 0; 908 909 ibmvfc_free_queue(vhost, crq); 910 } 911 912 /** 913 * ibmvfc_reenable_crq_queue - reenables the CRQ 914 * @vhost: ibmvfc host struct 915 * 916 * Return value: 917 * 0 on success / other on failure 918 **/ 919 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 920 { 921 int rc = 0; 922 struct vio_dev *vdev = to_vio_dev(vhost->dev); 923 unsigned long flags; 924 925 ibmvfc_dereg_sub_crqs(vhost); 926 927 /* Re-enable the CRQ */ 928 do { 929 if (rc) 930 msleep(100); 931 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 932 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 933 934 if (rc) 935 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 936 937 spin_lock_irqsave(vhost->host->host_lock, flags); 938 spin_lock(vhost->crq.q_lock); 939 vhost->do_enquiry = 1; 940 vhost->using_channels = 0; 941 spin_unlock(vhost->crq.q_lock); 942 spin_unlock_irqrestore(vhost->host->host_lock, flags); 943 944 ibmvfc_reg_sub_crqs(vhost); 945 946 return rc; 947 } 948 949 /** 950 * ibmvfc_reset_crq - resets a crq after a failure 951 * @vhost: ibmvfc host struct 952 * 953 * Return value: 954 * 0 on success / other on failure 955 **/ 956 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 957 { 958 int rc = 0; 959 unsigned long flags; 960 struct vio_dev *vdev = to_vio_dev(vhost->dev); 961 struct ibmvfc_queue *crq = &vhost->crq; 962 963 ibmvfc_dereg_sub_crqs(vhost); 964 965 /* Close the CRQ */ 966 do { 967 if (rc) 968 msleep(100); 969 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 970 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 971 972 spin_lock_irqsave(vhost->host->host_lock, flags); 973 spin_lock(vhost->crq.q_lock); 974 vhost->state = IBMVFC_NO_CRQ; 975 vhost->logged_in = 0; 976 vhost->do_enquiry = 1; 977 vhost->using_channels = 0; 978 979 /* Clean out the queue */ 980 memset(crq->msgs.crq, 0, PAGE_SIZE); 981 crq->cur = 0; 982 983 /* And re-open it again */ 984 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 985 crq->msg_token, PAGE_SIZE); 986 987 if (rc == H_CLOSED) 988 /* Adapter is good, but other end is not ready */ 989 dev_warn(vhost->dev, "Partner adapter not ready\n"); 990 else if (rc != 0) 991 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 992 993 spin_unlock(vhost->crq.q_lock); 994 spin_unlock_irqrestore(vhost->host->host_lock, flags); 995 996 ibmvfc_reg_sub_crqs(vhost); 997 998 return rc; 999 } 1000 1001 /** 1002 * ibmvfc_valid_event - Determines if event is valid. 1003 * @pool: event_pool that contains the event 1004 * @evt: ibmvfc event to be checked for validity 1005 * 1006 * Return value: 1007 * 1 if event is valid / 0 if event is not valid 1008 **/ 1009 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 1010 struct ibmvfc_event *evt) 1011 { 1012 int index = evt - pool->events; 1013 if (index < 0 || index >= pool->size) /* outside of bounds */ 1014 return 0; 1015 if (evt != pool->events + index) /* unaligned */ 1016 return 0; 1017 return 1; 1018 } 1019 1020 /** 1021 * ibmvfc_free_event - Free the specified event 1022 * @evt: ibmvfc_event to be freed 1023 * 1024 **/ 1025 static void ibmvfc_free_event(struct ibmvfc_event *evt) 1026 { 1027 struct ibmvfc_event_pool *pool = &evt->queue->evt_pool; 1028 unsigned long flags; 1029 1030 BUG_ON(!ibmvfc_valid_event(pool, evt)); 1031 BUG_ON(atomic_inc_return(&evt->free) != 1); 1032 BUG_ON(atomic_dec_and_test(&evt->active)); 1033 1034 spin_lock_irqsave(&evt->queue->l_lock, flags); 1035 list_add_tail(&evt->queue_list, &evt->queue->free); 1036 if (evt->eh_comp) 1037 complete(evt->eh_comp); 1038 spin_unlock_irqrestore(&evt->queue->l_lock, flags); 1039 } 1040 1041 /** 1042 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 1043 * @evt: ibmvfc event struct 1044 * 1045 * This function does not setup any error status, that must be done 1046 * before this function gets called. 1047 **/ 1048 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 1049 { 1050 struct scsi_cmnd *cmnd = evt->cmnd; 1051 1052 if (cmnd) { 1053 scsi_dma_unmap(cmnd); 1054 scsi_done(cmnd); 1055 } 1056 1057 ibmvfc_free_event(evt); 1058 } 1059 1060 /** 1061 * ibmvfc_complete_purge - Complete failed command list 1062 * @purge_list: list head of failed commands 1063 * 1064 * This function runs completions on commands to fail as a result of a 1065 * host reset or platform migration. 1066 **/ 1067 static void ibmvfc_complete_purge(struct list_head *purge_list) 1068 { 1069 struct ibmvfc_event *evt, *pos; 1070 1071 list_for_each_entry_safe(evt, pos, purge_list, queue_list) { 1072 list_del(&evt->queue_list); 1073 ibmvfc_trc_end(evt); 1074 evt->done(evt); 1075 } 1076 } 1077 1078 /** 1079 * ibmvfc_fail_request - Fail request with specified error code 1080 * @evt: ibmvfc event struct 1081 * @error_code: error code to fail request with 1082 * 1083 * Return value: 1084 * none 1085 **/ 1086 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 1087 { 1088 /* 1089 * Anything we are failing should still be active. Otherwise, it 1090 * implies we already got a response for the command and are doing 1091 * something bad like double completing it. 1092 */ 1093 BUG_ON(!atomic_dec_and_test(&evt->active)); 1094 if (evt->cmnd) { 1095 evt->cmnd->result = (error_code << 16); 1096 evt->done = ibmvfc_scsi_eh_done; 1097 } else 1098 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED); 1099 1100 del_timer(&evt->timer); 1101 } 1102 1103 /** 1104 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 1105 * @vhost: ibmvfc host struct 1106 * @error_code: error code to fail requests with 1107 * 1108 * Return value: 1109 * none 1110 **/ 1111 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 1112 { 1113 struct ibmvfc_event *evt, *pos; 1114 struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; 1115 unsigned long flags; 1116 int hwqs = 0; 1117 int i; 1118 1119 if (vhost->using_channels) 1120 hwqs = vhost->scsi_scrqs.active_queues; 1121 1122 ibmvfc_dbg(vhost, "Purging all requests\n"); 1123 spin_lock_irqsave(&vhost->crq.l_lock, flags); 1124 list_for_each_entry_safe(evt, pos, &vhost->crq.sent, queue_list) 1125 ibmvfc_fail_request(evt, error_code); 1126 list_splice_init(&vhost->crq.sent, &vhost->purge); 1127 spin_unlock_irqrestore(&vhost->crq.l_lock, flags); 1128 1129 for (i = 0; i < hwqs; i++) { 1130 spin_lock_irqsave(queues[i].q_lock, flags); 1131 spin_lock(&queues[i].l_lock); 1132 list_for_each_entry_safe(evt, pos, &queues[i].sent, queue_list) 1133 ibmvfc_fail_request(evt, error_code); 1134 list_splice_init(&queues[i].sent, &vhost->purge); 1135 spin_unlock(&queues[i].l_lock); 1136 spin_unlock_irqrestore(queues[i].q_lock, flags); 1137 } 1138 } 1139 1140 /** 1141 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 1142 * @vhost: struct ibmvfc host to reset 1143 **/ 1144 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 1145 { 1146 ibmvfc_purge_requests(vhost, DID_ERROR); 1147 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 1148 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 1149 } 1150 1151 /** 1152 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 1153 * @vhost: struct ibmvfc host to reset 1154 **/ 1155 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 1156 { 1157 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 1158 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 1159 scsi_block_requests(vhost->host); 1160 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 1161 vhost->job_step = ibmvfc_npiv_logout; 1162 wake_up(&vhost->work_wait_q); 1163 } else 1164 ibmvfc_hard_reset_host(vhost); 1165 } 1166 1167 /** 1168 * ibmvfc_reset_host - Reset the connection to the server 1169 * @vhost: ibmvfc host struct 1170 **/ 1171 static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 1172 { 1173 unsigned long flags; 1174 1175 spin_lock_irqsave(vhost->host->host_lock, flags); 1176 __ibmvfc_reset_host(vhost); 1177 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1178 } 1179 1180 /** 1181 * ibmvfc_retry_host_init - Retry host initialization if allowed 1182 * @vhost: ibmvfc host struct 1183 * 1184 * Returns: 1 if init will be retried / 0 if not 1185 * 1186 **/ 1187 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 1188 { 1189 int retry = 0; 1190 1191 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 1192 vhost->delay_init = 1; 1193 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 1194 dev_err(vhost->dev, 1195 "Host initialization retries exceeded. Taking adapter offline\n"); 1196 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 1197 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 1198 __ibmvfc_reset_host(vhost); 1199 else { 1200 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 1201 retry = 1; 1202 } 1203 } 1204 1205 wake_up(&vhost->work_wait_q); 1206 return retry; 1207 } 1208 1209 /** 1210 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 1211 * @starget: scsi target struct 1212 * 1213 * Return value: 1214 * ibmvfc_target struct / NULL if not found 1215 **/ 1216 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 1217 { 1218 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 1219 struct ibmvfc_host *vhost = shost_priv(shost); 1220 struct ibmvfc_target *tgt; 1221 1222 list_for_each_entry(tgt, &vhost->targets, queue) 1223 if (tgt->target_id == starget->id) { 1224 kref_get(&tgt->kref); 1225 return tgt; 1226 } 1227 return NULL; 1228 } 1229 1230 /** 1231 * ibmvfc_get_target - Find the specified scsi_target 1232 * @starget: scsi target struct 1233 * 1234 * Return value: 1235 * ibmvfc_target struct / NULL if not found 1236 **/ 1237 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 1238 { 1239 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 1240 struct ibmvfc_target *tgt; 1241 unsigned long flags; 1242 1243 spin_lock_irqsave(shost->host_lock, flags); 1244 tgt = __ibmvfc_get_target(starget); 1245 spin_unlock_irqrestore(shost->host_lock, flags); 1246 return tgt; 1247 } 1248 1249 /** 1250 * ibmvfc_get_host_speed - Get host port speed 1251 * @shost: scsi host struct 1252 * 1253 * Return value: 1254 * none 1255 **/ 1256 static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 1257 { 1258 struct ibmvfc_host *vhost = shost_priv(shost); 1259 unsigned long flags; 1260 1261 spin_lock_irqsave(shost->host_lock, flags); 1262 if (vhost->state == IBMVFC_ACTIVE) { 1263 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) { 1264 case 1: 1265 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 1266 break; 1267 case 2: 1268 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 1269 break; 1270 case 4: 1271 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 1272 break; 1273 case 8: 1274 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 1275 break; 1276 case 10: 1277 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 1278 break; 1279 case 16: 1280 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 1281 break; 1282 default: 1283 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 1284 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100); 1285 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 1286 break; 1287 } 1288 } else 1289 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 1290 spin_unlock_irqrestore(shost->host_lock, flags); 1291 } 1292 1293 /** 1294 * ibmvfc_get_host_port_state - Get host port state 1295 * @shost: scsi host struct 1296 * 1297 * Return value: 1298 * none 1299 **/ 1300 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 1301 { 1302 struct ibmvfc_host *vhost = shost_priv(shost); 1303 unsigned long flags; 1304 1305 spin_lock_irqsave(shost->host_lock, flags); 1306 switch (vhost->state) { 1307 case IBMVFC_INITIALIZING: 1308 case IBMVFC_ACTIVE: 1309 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 1310 break; 1311 case IBMVFC_LINK_DOWN: 1312 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 1313 break; 1314 case IBMVFC_LINK_DEAD: 1315 case IBMVFC_HOST_OFFLINE: 1316 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1317 break; 1318 case IBMVFC_HALTED: 1319 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1320 break; 1321 case IBMVFC_NO_CRQ: 1322 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1323 break; 1324 default: 1325 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1326 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1327 break; 1328 } 1329 spin_unlock_irqrestore(shost->host_lock, flags); 1330 } 1331 1332 /** 1333 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1334 * @rport: rport struct 1335 * @timeout: timeout value 1336 * 1337 * Return value: 1338 * none 1339 **/ 1340 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1341 { 1342 if (timeout) 1343 rport->dev_loss_tmo = timeout; 1344 else 1345 rport->dev_loss_tmo = 1; 1346 } 1347 1348 /** 1349 * ibmvfc_release_tgt - Free memory allocated for a target 1350 * @kref: kref struct 1351 * 1352 **/ 1353 static void ibmvfc_release_tgt(struct kref *kref) 1354 { 1355 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1356 kfree(tgt); 1357 } 1358 1359 /** 1360 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1361 * @starget: scsi target struct 1362 * 1363 * Return value: 1364 * none 1365 **/ 1366 static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1367 { 1368 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1369 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1370 if (tgt) 1371 kref_put(&tgt->kref, ibmvfc_release_tgt); 1372 } 1373 1374 /** 1375 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1376 * @starget: scsi target struct 1377 * 1378 * Return value: 1379 * none 1380 **/ 1381 static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1382 { 1383 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1384 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1385 if (tgt) 1386 kref_put(&tgt->kref, ibmvfc_release_tgt); 1387 } 1388 1389 /** 1390 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1391 * @starget: scsi target struct 1392 * 1393 * Return value: 1394 * none 1395 **/ 1396 static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1397 { 1398 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1399 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1400 if (tgt) 1401 kref_put(&tgt->kref, ibmvfc_release_tgt); 1402 } 1403 1404 /** 1405 * ibmvfc_wait_while_resetting - Wait while the host resets 1406 * @vhost: ibmvfc host struct 1407 * 1408 * Return value: 1409 * 0 on success / other on failure 1410 **/ 1411 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1412 { 1413 long timeout = wait_event_timeout(vhost->init_wait_q, 1414 ((vhost->state == IBMVFC_ACTIVE || 1415 vhost->state == IBMVFC_HOST_OFFLINE || 1416 vhost->state == IBMVFC_LINK_DEAD) && 1417 vhost->action == IBMVFC_HOST_ACTION_NONE), 1418 (init_timeout * HZ)); 1419 1420 return timeout ? 0 : -EIO; 1421 } 1422 1423 /** 1424 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1425 * @shost: scsi host struct 1426 * 1427 * Return value: 1428 * 0 on success / other on failure 1429 **/ 1430 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1431 { 1432 struct ibmvfc_host *vhost = shost_priv(shost); 1433 1434 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1435 ibmvfc_reset_host(vhost); 1436 return ibmvfc_wait_while_resetting(vhost); 1437 } 1438 1439 /** 1440 * ibmvfc_gather_partition_info - Gather info about the LPAR 1441 * @vhost: ibmvfc host struct 1442 * 1443 * Return value: 1444 * none 1445 **/ 1446 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1447 { 1448 struct device_node *rootdn; 1449 const char *name; 1450 const unsigned int *num; 1451 1452 rootdn = of_find_node_by_path("/"); 1453 if (!rootdn) 1454 return; 1455 1456 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1457 if (name) 1458 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1459 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1460 if (num) 1461 vhost->partition_number = *num; 1462 of_node_put(rootdn); 1463 } 1464 1465 /** 1466 * ibmvfc_set_login_info - Setup info for NPIV login 1467 * @vhost: ibmvfc host struct 1468 * 1469 * Return value: 1470 * none 1471 **/ 1472 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1473 { 1474 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1475 struct ibmvfc_queue *async_crq = &vhost->async_crq; 1476 struct device_node *of_node = vhost->dev->of_node; 1477 const char *location; 1478 1479 memset(login_info, 0, sizeof(*login_info)); 1480 1481 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX); 1482 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); 1483 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); 1484 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); 1485 login_info->partition_num = cpu_to_be32(vhost->partition_number); 1486 login_info->vfc_frame_version = cpu_to_be32(1); 1487 login_info->fcp_version = cpu_to_be16(3); 1488 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); 1489 if (vhost->client_migrated) 1490 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); 1491 1492 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ); 1493 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE | IBMVFC_CAN_SEND_VF_WWPN); 1494 1495 if (vhost->mq_enabled || vhost->using_channels) 1496 login_info->capabilities |= cpu_to_be64(IBMVFC_CAN_USE_CHANNELS); 1497 1498 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); 1499 login_info->async.len = cpu_to_be32(async_crq->size * 1500 sizeof(*async_crq->msgs.async)); 1501 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1502 strncpy(login_info->device_name, 1503 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1504 1505 location = of_get_property(of_node, "ibm,loc-code", NULL); 1506 location = location ? location : dev_name(vhost->dev); 1507 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1508 } 1509 1510 /** 1511 * ibmvfc_get_event - Gets the next free event in pool 1512 * @queue: ibmvfc queue struct 1513 * 1514 * Returns a free event from the pool. 1515 **/ 1516 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_queue *queue) 1517 { 1518 struct ibmvfc_event *evt; 1519 unsigned long flags; 1520 1521 spin_lock_irqsave(&queue->l_lock, flags); 1522 BUG_ON(list_empty(&queue->free)); 1523 evt = list_entry(queue->free.next, struct ibmvfc_event, queue_list); 1524 atomic_set(&evt->free, 0); 1525 list_del(&evt->queue_list); 1526 spin_unlock_irqrestore(&queue->l_lock, flags); 1527 return evt; 1528 } 1529 1530 /** 1531 * ibmvfc_locked_done - Calls evt completion with host_lock held 1532 * @evt: ibmvfc evt to complete 1533 * 1534 * All non-scsi command completion callbacks have the expectation that the 1535 * host_lock is held. This callback is used by ibmvfc_init_event to wrap a 1536 * MAD evt with the host_lock. 1537 **/ 1538 static void ibmvfc_locked_done(struct ibmvfc_event *evt) 1539 { 1540 unsigned long flags; 1541 1542 spin_lock_irqsave(evt->vhost->host->host_lock, flags); 1543 evt->_done(evt); 1544 spin_unlock_irqrestore(evt->vhost->host->host_lock, flags); 1545 } 1546 1547 /** 1548 * ibmvfc_init_event - Initialize fields in an event struct that are always 1549 * required. 1550 * @evt: The event 1551 * @done: Routine to call when the event is responded to 1552 * @format: SRP or MAD format 1553 **/ 1554 static void ibmvfc_init_event(struct ibmvfc_event *evt, 1555 void (*done) (struct ibmvfc_event *), u8 format) 1556 { 1557 evt->cmnd = NULL; 1558 evt->sync_iu = NULL; 1559 evt->eh_comp = NULL; 1560 evt->crq.format = format; 1561 if (format == IBMVFC_CMD_FORMAT) 1562 evt->done = done; 1563 else { 1564 evt->_done = done; 1565 evt->done = ibmvfc_locked_done; 1566 } 1567 evt->hwq = 0; 1568 } 1569 1570 /** 1571 * ibmvfc_map_sg_list - Initialize scatterlist 1572 * @scmd: scsi command struct 1573 * @nseg: number of scatterlist segments 1574 * @md: memory descriptor list to initialize 1575 **/ 1576 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1577 struct srp_direct_buf *md) 1578 { 1579 int i; 1580 struct scatterlist *sg; 1581 1582 scsi_for_each_sg(scmd, sg, nseg, i) { 1583 md[i].va = cpu_to_be64(sg_dma_address(sg)); 1584 md[i].len = cpu_to_be32(sg_dma_len(sg)); 1585 md[i].key = 0; 1586 } 1587 } 1588 1589 /** 1590 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes descriptor fields 1591 * @scmd: struct scsi_cmnd with the scatterlist 1592 * @evt: ibmvfc event struct 1593 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1594 * @dev: device for which to map dma memory 1595 * 1596 * Returns: 1597 * 0 on success / non-zero on failure 1598 **/ 1599 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1600 struct ibmvfc_event *evt, 1601 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1602 { 1603 1604 int sg_mapped; 1605 struct srp_direct_buf *data = &vfc_cmd->ioba; 1606 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1607 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(evt->vhost, vfc_cmd); 1608 1609 if (cls3_error) 1610 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR); 1611 1612 sg_mapped = scsi_dma_map(scmd); 1613 if (!sg_mapped) { 1614 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC); 1615 return 0; 1616 } else if (unlikely(sg_mapped < 0)) { 1617 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1618 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1619 return sg_mapped; 1620 } 1621 1622 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1623 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE); 1624 iu->add_cdb_len |= IBMVFC_WRDATA; 1625 } else { 1626 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ); 1627 iu->add_cdb_len |= IBMVFC_RDDATA; 1628 } 1629 1630 if (sg_mapped == 1) { 1631 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1632 return 0; 1633 } 1634 1635 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST); 1636 1637 if (!evt->ext_list) { 1638 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1639 &evt->ext_list_token); 1640 1641 if (!evt->ext_list) { 1642 scsi_dma_unmap(scmd); 1643 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1644 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1645 return -ENOMEM; 1646 } 1647 } 1648 1649 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1650 1651 data->va = cpu_to_be64(evt->ext_list_token); 1652 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf)); 1653 data->key = 0; 1654 return 0; 1655 } 1656 1657 /** 1658 * ibmvfc_timeout - Internal command timeout handler 1659 * @t: struct ibmvfc_event that timed out 1660 * 1661 * Called when an internally generated command times out 1662 **/ 1663 static void ibmvfc_timeout(struct timer_list *t) 1664 { 1665 struct ibmvfc_event *evt = from_timer(evt, t, timer); 1666 struct ibmvfc_host *vhost = evt->vhost; 1667 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1668 ibmvfc_reset_host(vhost); 1669 } 1670 1671 /** 1672 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1673 * @evt: event to be sent 1674 * @vhost: ibmvfc host struct 1675 * @timeout: timeout in seconds - 0 means do not time command 1676 * 1677 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1678 **/ 1679 static int ibmvfc_send_event(struct ibmvfc_event *evt, 1680 struct ibmvfc_host *vhost, unsigned long timeout) 1681 { 1682 __be64 *crq_as_u64 = (__be64 *) &evt->crq; 1683 unsigned long flags; 1684 int rc; 1685 1686 /* Copy the IU into the transfer area */ 1687 *evt->xfer_iu = evt->iu; 1688 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1689 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); 1690 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1691 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); 1692 else 1693 BUG(); 1694 1695 timer_setup(&evt->timer, ibmvfc_timeout, 0); 1696 1697 if (timeout) { 1698 evt->timer.expires = jiffies + (timeout * HZ); 1699 add_timer(&evt->timer); 1700 } 1701 1702 spin_lock_irqsave(&evt->queue->l_lock, flags); 1703 list_add_tail(&evt->queue_list, &evt->queue->sent); 1704 atomic_set(&evt->active, 1); 1705 1706 mb(); 1707 1708 if (evt->queue->fmt == IBMVFC_SUB_CRQ_FMT) 1709 rc = ibmvfc_send_sub_crq(vhost, 1710 evt->queue->vios_cookie, 1711 be64_to_cpu(crq_as_u64[0]), 1712 be64_to_cpu(crq_as_u64[1]), 1713 0, 0); 1714 else 1715 rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), 1716 be64_to_cpu(crq_as_u64[1])); 1717 1718 if (rc) { 1719 atomic_set(&evt->active, 0); 1720 list_del(&evt->queue_list); 1721 spin_unlock_irqrestore(&evt->queue->l_lock, flags); 1722 del_timer(&evt->timer); 1723 1724 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1725 * Firmware will send a CRQ with a transport event (0xFF) to 1726 * tell this client what has happened to the transport. This 1727 * will be handled in ibmvfc_handle_crq() 1728 */ 1729 if (rc == H_CLOSED) { 1730 if (printk_ratelimit()) 1731 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1732 if (evt->cmnd) 1733 scsi_dma_unmap(evt->cmnd); 1734 ibmvfc_free_event(evt); 1735 return SCSI_MLQUEUE_HOST_BUSY; 1736 } 1737 1738 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1739 if (evt->cmnd) { 1740 evt->cmnd->result = DID_ERROR << 16; 1741 evt->done = ibmvfc_scsi_eh_done; 1742 } else 1743 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); 1744 1745 evt->done(evt); 1746 } else { 1747 spin_unlock_irqrestore(&evt->queue->l_lock, flags); 1748 ibmvfc_trc_start(evt); 1749 } 1750 1751 return 0; 1752 } 1753 1754 /** 1755 * ibmvfc_log_error - Log an error for the failed command if appropriate 1756 * @evt: ibmvfc event to log 1757 * 1758 **/ 1759 static void ibmvfc_log_error(struct ibmvfc_event *evt) 1760 { 1761 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1762 struct ibmvfc_host *vhost = evt->vhost; 1763 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 1764 struct scsi_cmnd *cmnd = evt->cmnd; 1765 const char *err = unknown_error; 1766 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 1767 int logerr = 0; 1768 int rsp_code = 0; 1769 1770 if (index >= 0) { 1771 logerr = cmd_status[index].log; 1772 err = cmd_status[index].name; 1773 } 1774 1775 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1776 return; 1777 1778 if (rsp->flags & FCP_RSP_LEN_VALID) 1779 rsp_code = rsp->data.info.rsp_code; 1780 1781 scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) " 1782 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1783 cmnd->cmnd[0], err, be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error), 1784 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1785 } 1786 1787 /** 1788 * ibmvfc_relogin - Log back into the specified device 1789 * @sdev: scsi device struct 1790 * 1791 **/ 1792 static void ibmvfc_relogin(struct scsi_device *sdev) 1793 { 1794 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1795 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1796 struct ibmvfc_target *tgt; 1797 unsigned long flags; 1798 1799 spin_lock_irqsave(vhost->host->host_lock, flags); 1800 list_for_each_entry(tgt, &vhost->targets, queue) { 1801 if (rport == tgt->rport) { 1802 ibmvfc_del_tgt(tgt); 1803 break; 1804 } 1805 } 1806 1807 ibmvfc_reinit_host(vhost); 1808 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1809 } 1810 1811 /** 1812 * ibmvfc_scsi_done - Handle responses from commands 1813 * @evt: ibmvfc event to be handled 1814 * 1815 * Used as a callback when sending scsi cmds. 1816 **/ 1817 static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1818 { 1819 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1820 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(evt->vhost, vfc_cmd); 1821 struct scsi_cmnd *cmnd = evt->cmnd; 1822 u32 rsp_len = 0; 1823 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); 1824 1825 if (cmnd) { 1826 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) 1827 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); 1828 else if (rsp->flags & FCP_RESID_UNDER) 1829 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); 1830 else 1831 scsi_set_resid(cmnd, 0); 1832 1833 if (vfc_cmd->status) { 1834 cmnd->result = ibmvfc_get_err_result(evt->vhost, vfc_cmd); 1835 1836 if (rsp->flags & FCP_RSP_LEN_VALID) 1837 rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 1838 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1839 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1840 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1841 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1842 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && 1843 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) 1844 ibmvfc_relogin(cmnd->device); 1845 1846 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1847 cmnd->result = (DID_ERROR << 16); 1848 1849 ibmvfc_log_error(evt); 1850 } 1851 1852 if (!cmnd->result && 1853 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1854 cmnd->result = (DID_ERROR << 16); 1855 1856 scsi_dma_unmap(cmnd); 1857 scsi_done(cmnd); 1858 } 1859 1860 ibmvfc_free_event(evt); 1861 } 1862 1863 /** 1864 * ibmvfc_host_chkready - Check if the host can accept commands 1865 * @vhost: struct ibmvfc host 1866 * 1867 * Returns: 1868 * 1 if host can accept command / 0 if not 1869 **/ 1870 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1871 { 1872 int result = 0; 1873 1874 switch (vhost->state) { 1875 case IBMVFC_LINK_DEAD: 1876 case IBMVFC_HOST_OFFLINE: 1877 result = DID_NO_CONNECT << 16; 1878 break; 1879 case IBMVFC_NO_CRQ: 1880 case IBMVFC_INITIALIZING: 1881 case IBMVFC_HALTED: 1882 case IBMVFC_LINK_DOWN: 1883 result = DID_REQUEUE << 16; 1884 break; 1885 case IBMVFC_ACTIVE: 1886 result = 0; 1887 break; 1888 } 1889 1890 return result; 1891 } 1892 1893 static struct ibmvfc_cmd *ibmvfc_init_vfc_cmd(struct ibmvfc_event *evt, struct scsi_device *sdev) 1894 { 1895 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1896 struct ibmvfc_host *vhost = evt->vhost; 1897 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 1898 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 1899 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 1900 size_t offset; 1901 1902 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1903 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 1904 offset = offsetof(struct ibmvfc_cmd, v2.rsp); 1905 vfc_cmd->target_wwpn = cpu_to_be64(rport->port_name); 1906 } else 1907 offset = offsetof(struct ibmvfc_cmd, v1.rsp); 1908 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offset); 1909 vfc_cmd->resp.len = cpu_to_be32(sizeof(*rsp)); 1910 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1911 vfc_cmd->payload_len = cpu_to_be32(sizeof(*iu)); 1912 vfc_cmd->resp_len = cpu_to_be32(sizeof(*rsp)); 1913 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 1914 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); 1915 int_to_scsilun(sdev->lun, &iu->lun); 1916 1917 return vfc_cmd; 1918 } 1919 1920 /** 1921 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1922 * @shost: scsi host struct 1923 * @cmnd: struct scsi_cmnd to be executed 1924 * 1925 * Returns: 1926 * 0 on success / other on failure 1927 **/ 1928 static int ibmvfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) 1929 { 1930 struct ibmvfc_host *vhost = shost_priv(shost); 1931 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1932 struct ibmvfc_cmd *vfc_cmd; 1933 struct ibmvfc_fcp_cmd_iu *iu; 1934 struct ibmvfc_event *evt; 1935 u32 tag_and_hwq = blk_mq_unique_tag(scsi_cmd_to_rq(cmnd)); 1936 u16 hwq = blk_mq_unique_tag_to_hwq(tag_and_hwq); 1937 u16 scsi_channel; 1938 int rc; 1939 1940 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1941 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1942 cmnd->result = rc; 1943 scsi_done(cmnd); 1944 return 0; 1945 } 1946 1947 cmnd->result = (DID_OK << 16); 1948 if (vhost->using_channels) { 1949 scsi_channel = hwq % vhost->scsi_scrqs.active_queues; 1950 evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[scsi_channel]); 1951 evt->hwq = hwq % vhost->scsi_scrqs.active_queues; 1952 } else 1953 evt = ibmvfc_get_event(&vhost->crq); 1954 1955 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1956 evt->cmnd = cmnd; 1957 1958 vfc_cmd = ibmvfc_init_vfc_cmd(evt, cmnd->device); 1959 iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 1960 1961 iu->xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); 1962 memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); 1963 1964 if (cmnd->flags & SCMD_TAGGED) { 1965 vfc_cmd->task_tag = cpu_to_be64(scsi_cmd_to_rq(cmnd)->tag); 1966 iu->pri_task_attr = IBMVFC_SIMPLE_TASK; 1967 } 1968 1969 vfc_cmd->correlation = cpu_to_be64((u64)evt); 1970 1971 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1972 return ibmvfc_send_event(evt, vhost, 0); 1973 1974 ibmvfc_free_event(evt); 1975 if (rc == -ENOMEM) 1976 return SCSI_MLQUEUE_HOST_BUSY; 1977 1978 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1979 scmd_printk(KERN_ERR, cmnd, 1980 "Failed to map DMA buffer for command. rc=%d\n", rc); 1981 1982 cmnd->result = DID_ERROR << 16; 1983 scsi_done(cmnd); 1984 return 0; 1985 } 1986 1987 /** 1988 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1989 * @evt: ibmvfc event struct 1990 * 1991 **/ 1992 static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1993 { 1994 /* copy the response back */ 1995 if (evt->sync_iu) 1996 *evt->sync_iu = *evt->xfer_iu; 1997 1998 complete(&evt->comp); 1999 } 2000 2001 /** 2002 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 2003 * @evt: struct ibmvfc_event 2004 * 2005 **/ 2006 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 2007 { 2008 struct ibmvfc_host *vhost = evt->vhost; 2009 2010 ibmvfc_free_event(evt); 2011 vhost->aborting_passthru = 0; 2012 dev_info(vhost->dev, "Passthru command cancelled\n"); 2013 } 2014 2015 /** 2016 * ibmvfc_bsg_timeout - Handle a BSG timeout 2017 * @job: struct bsg_job that timed out 2018 * 2019 * Returns: 2020 * 0 on success / other on failure 2021 **/ 2022 static int ibmvfc_bsg_timeout(struct bsg_job *job) 2023 { 2024 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 2025 unsigned long port_id = (unsigned long)job->dd_data; 2026 struct ibmvfc_event *evt; 2027 struct ibmvfc_tmf *tmf; 2028 unsigned long flags; 2029 int rc; 2030 2031 ENTER; 2032 spin_lock_irqsave(vhost->host->host_lock, flags); 2033 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 2034 __ibmvfc_reset_host(vhost); 2035 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2036 return 0; 2037 } 2038 2039 vhost->aborting_passthru = 1; 2040 evt = ibmvfc_get_event(&vhost->crq); 2041 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 2042 2043 tmf = &evt->iu.tmf; 2044 memset(tmf, 0, sizeof(*tmf)); 2045 tmf->common.version = cpu_to_be32(1); 2046 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2047 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2048 tmf->scsi_id = cpu_to_be64(port_id); 2049 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 2050 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); 2051 rc = ibmvfc_send_event(evt, vhost, default_timeout); 2052 2053 if (rc != 0) { 2054 vhost->aborting_passthru = 0; 2055 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 2056 rc = -EIO; 2057 } else 2058 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 2059 port_id); 2060 2061 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2062 2063 LEAVE; 2064 return rc; 2065 } 2066 2067 /** 2068 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 2069 * @vhost: struct ibmvfc_host to send command 2070 * @port_id: port ID to send command 2071 * 2072 * Returns: 2073 * 0 on success / other on failure 2074 **/ 2075 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 2076 { 2077 struct ibmvfc_port_login *plogi; 2078 struct ibmvfc_target *tgt; 2079 struct ibmvfc_event *evt; 2080 union ibmvfc_iu rsp_iu; 2081 unsigned long flags; 2082 int rc = 0, issue_login = 1; 2083 2084 ENTER; 2085 spin_lock_irqsave(vhost->host->host_lock, flags); 2086 list_for_each_entry(tgt, &vhost->targets, queue) { 2087 if (tgt->scsi_id == port_id) { 2088 issue_login = 0; 2089 break; 2090 } 2091 } 2092 2093 if (!issue_login) 2094 goto unlock_out; 2095 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 2096 goto unlock_out; 2097 2098 evt = ibmvfc_get_event(&vhost->crq); 2099 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2100 plogi = &evt->iu.plogi; 2101 memset(plogi, 0, sizeof(*plogi)); 2102 plogi->common.version = cpu_to_be32(1); 2103 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 2104 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 2105 plogi->scsi_id = cpu_to_be64(port_id); 2106 evt->sync_iu = &rsp_iu; 2107 init_completion(&evt->comp); 2108 2109 rc = ibmvfc_send_event(evt, vhost, default_timeout); 2110 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2111 2112 if (rc) 2113 return -EIO; 2114 2115 wait_for_completion(&evt->comp); 2116 2117 if (rsp_iu.plogi.common.status) 2118 rc = -EIO; 2119 2120 spin_lock_irqsave(vhost->host->host_lock, flags); 2121 ibmvfc_free_event(evt); 2122 unlock_out: 2123 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2124 LEAVE; 2125 return rc; 2126 } 2127 2128 /** 2129 * ibmvfc_bsg_request - Handle a BSG request 2130 * @job: struct bsg_job to be executed 2131 * 2132 * Returns: 2133 * 0 on success / other on failure 2134 **/ 2135 static int ibmvfc_bsg_request(struct bsg_job *job) 2136 { 2137 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 2138 struct fc_rport *rport = fc_bsg_to_rport(job); 2139 struct ibmvfc_passthru_mad *mad; 2140 struct ibmvfc_event *evt; 2141 union ibmvfc_iu rsp_iu; 2142 unsigned long flags, port_id = -1; 2143 struct fc_bsg_request *bsg_request = job->request; 2144 struct fc_bsg_reply *bsg_reply = job->reply; 2145 unsigned int code = bsg_request->msgcode; 2146 int rc = 0, req_seg, rsp_seg, issue_login = 0; 2147 u32 fc_flags, rsp_len; 2148 2149 ENTER; 2150 bsg_reply->reply_payload_rcv_len = 0; 2151 if (rport) 2152 port_id = rport->port_id; 2153 2154 switch (code) { 2155 case FC_BSG_HST_ELS_NOLOGIN: 2156 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) | 2157 (bsg_request->rqst_data.h_els.port_id[1] << 8) | 2158 bsg_request->rqst_data.h_els.port_id[2]; 2159 fallthrough; 2160 case FC_BSG_RPT_ELS: 2161 fc_flags = IBMVFC_FC_ELS; 2162 break; 2163 case FC_BSG_HST_CT: 2164 issue_login = 1; 2165 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) | 2166 (bsg_request->rqst_data.h_ct.port_id[1] << 8) | 2167 bsg_request->rqst_data.h_ct.port_id[2]; 2168 fallthrough; 2169 case FC_BSG_RPT_CT: 2170 fc_flags = IBMVFC_FC_CT_IU; 2171 break; 2172 default: 2173 return -ENOTSUPP; 2174 } 2175 2176 if (port_id == -1) 2177 return -EINVAL; 2178 if (!mutex_trylock(&vhost->passthru_mutex)) 2179 return -EBUSY; 2180 2181 job->dd_data = (void *)port_id; 2182 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 2183 job->request_payload.sg_cnt, DMA_TO_DEVICE); 2184 2185 if (!req_seg) { 2186 mutex_unlock(&vhost->passthru_mutex); 2187 return -ENOMEM; 2188 } 2189 2190 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 2191 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 2192 2193 if (!rsp_seg) { 2194 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 2195 job->request_payload.sg_cnt, DMA_TO_DEVICE); 2196 mutex_unlock(&vhost->passthru_mutex); 2197 return -ENOMEM; 2198 } 2199 2200 if (req_seg > 1 || rsp_seg > 1) { 2201 rc = -EINVAL; 2202 goto out; 2203 } 2204 2205 if (issue_login) 2206 rc = ibmvfc_bsg_plogi(vhost, port_id); 2207 2208 spin_lock_irqsave(vhost->host->host_lock, flags); 2209 2210 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 2211 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 2212 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2213 goto out; 2214 } 2215 2216 evt = ibmvfc_get_event(&vhost->crq); 2217 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2218 mad = &evt->iu.passthru; 2219 2220 memset(mad, 0, sizeof(*mad)); 2221 mad->common.version = cpu_to_be32(1); 2222 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 2223 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 2224 2225 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + 2226 offsetof(struct ibmvfc_passthru_mad, iu)); 2227 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 2228 2229 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); 2230 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); 2231 mad->iu.flags = cpu_to_be32(fc_flags); 2232 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 2233 2234 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); 2235 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); 2236 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); 2237 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); 2238 mad->iu.scsi_id = cpu_to_be64(port_id); 2239 mad->iu.tag = cpu_to_be64((u64)evt); 2240 rsp_len = be32_to_cpu(mad->iu.rsp.len); 2241 2242 evt->sync_iu = &rsp_iu; 2243 init_completion(&evt->comp); 2244 rc = ibmvfc_send_event(evt, vhost, 0); 2245 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2246 2247 if (rc) { 2248 rc = -EIO; 2249 goto out; 2250 } 2251 2252 wait_for_completion(&evt->comp); 2253 2254 if (rsp_iu.passthru.common.status) 2255 rc = -EIO; 2256 else 2257 bsg_reply->reply_payload_rcv_len = rsp_len; 2258 2259 spin_lock_irqsave(vhost->host->host_lock, flags); 2260 ibmvfc_free_event(evt); 2261 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2262 bsg_reply->result = rc; 2263 bsg_job_done(job, bsg_reply->result, 2264 bsg_reply->reply_payload_rcv_len); 2265 rc = 0; 2266 out: 2267 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 2268 job->request_payload.sg_cnt, DMA_TO_DEVICE); 2269 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 2270 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 2271 mutex_unlock(&vhost->passthru_mutex); 2272 LEAVE; 2273 return rc; 2274 } 2275 2276 /** 2277 * ibmvfc_reset_device - Reset the device with the specified reset type 2278 * @sdev: scsi device to reset 2279 * @type: reset type 2280 * @desc: reset type description for log messages 2281 * 2282 * Returns: 2283 * 0 on success / other on failure 2284 **/ 2285 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 2286 { 2287 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2288 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2289 struct ibmvfc_cmd *tmf; 2290 struct ibmvfc_event *evt = NULL; 2291 union ibmvfc_iu rsp_iu; 2292 struct ibmvfc_fcp_cmd_iu *iu; 2293 struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); 2294 int rsp_rc = -EBUSY; 2295 unsigned long flags; 2296 int rsp_code = 0; 2297 2298 spin_lock_irqsave(vhost->host->host_lock, flags); 2299 if (vhost->state == IBMVFC_ACTIVE) { 2300 if (vhost->using_channels) 2301 evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[0]); 2302 else 2303 evt = ibmvfc_get_event(&vhost->crq); 2304 2305 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2306 tmf = ibmvfc_init_vfc_cmd(evt, sdev); 2307 iu = ibmvfc_get_fcp_iu(vhost, tmf); 2308 2309 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2310 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 2311 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2312 iu->tmf_flags = type; 2313 evt->sync_iu = &rsp_iu; 2314 2315 init_completion(&evt->comp); 2316 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2317 } 2318 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2319 2320 if (rsp_rc != 0) { 2321 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 2322 desc, rsp_rc); 2323 return -EIO; 2324 } 2325 2326 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2327 wait_for_completion(&evt->comp); 2328 2329 if (rsp_iu.cmd.status) 2330 rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); 2331 2332 if (rsp_code) { 2333 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2334 rsp_code = fc_rsp->data.info.rsp_code; 2335 2336 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2337 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, 2338 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2339 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, 2340 fc_rsp->scsi_status); 2341 rsp_rc = -EIO; 2342 } else 2343 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2344 2345 spin_lock_irqsave(vhost->host->host_lock, flags); 2346 ibmvfc_free_event(evt); 2347 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2348 return rsp_rc; 2349 } 2350 2351 /** 2352 * ibmvfc_match_rport - Match function for specified remote port 2353 * @evt: ibmvfc event struct 2354 * @rport: device to match 2355 * 2356 * Returns: 2357 * 1 if event matches rport / 0 if event does not match rport 2358 **/ 2359 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2360 { 2361 struct fc_rport *cmd_rport; 2362 2363 if (evt->cmnd) { 2364 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2365 if (cmd_rport == rport) 2366 return 1; 2367 } 2368 return 0; 2369 } 2370 2371 /** 2372 * ibmvfc_match_target - Match function for specified target 2373 * @evt: ibmvfc event struct 2374 * @device: device to match (starget) 2375 * 2376 * Returns: 2377 * 1 if event matches starget / 0 if event does not match starget 2378 **/ 2379 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2380 { 2381 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2382 return 1; 2383 return 0; 2384 } 2385 2386 /** 2387 * ibmvfc_match_lun - Match function for specified LUN 2388 * @evt: ibmvfc event struct 2389 * @device: device to match (sdev) 2390 * 2391 * Returns: 2392 * 1 if event matches sdev / 0 if event does not match sdev 2393 **/ 2394 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2395 { 2396 if (evt->cmnd && evt->cmnd->device == device) 2397 return 1; 2398 return 0; 2399 } 2400 2401 /** 2402 * ibmvfc_event_is_free - Check if event is free or not 2403 * @evt: ibmvfc event struct 2404 * 2405 * Returns: 2406 * true / false 2407 **/ 2408 static bool ibmvfc_event_is_free(struct ibmvfc_event *evt) 2409 { 2410 struct ibmvfc_event *loop_evt; 2411 2412 list_for_each_entry(loop_evt, &evt->queue->free, queue_list) 2413 if (loop_evt == evt) 2414 return true; 2415 2416 return false; 2417 } 2418 2419 /** 2420 * ibmvfc_wait_for_ops - Wait for ops to complete 2421 * @vhost: ibmvfc host struct 2422 * @device: device to match (starget or sdev) 2423 * @match: match function 2424 * 2425 * Returns: 2426 * SUCCESS / FAILED 2427 **/ 2428 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2429 int (*match) (struct ibmvfc_event *, void *)) 2430 { 2431 struct ibmvfc_event *evt; 2432 DECLARE_COMPLETION_ONSTACK(comp); 2433 int wait, i, q_index, q_size; 2434 unsigned long flags; 2435 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2436 struct ibmvfc_queue *queues; 2437 2438 ENTER; 2439 if (vhost->mq_enabled && vhost->using_channels) { 2440 queues = vhost->scsi_scrqs.scrqs; 2441 q_size = vhost->scsi_scrqs.active_queues; 2442 } else { 2443 queues = &vhost->crq; 2444 q_size = 1; 2445 } 2446 2447 do { 2448 wait = 0; 2449 spin_lock_irqsave(vhost->host->host_lock, flags); 2450 for (q_index = 0; q_index < q_size; q_index++) { 2451 spin_lock(&queues[q_index].l_lock); 2452 for (i = 0; i < queues[q_index].evt_pool.size; i++) { 2453 evt = &queues[q_index].evt_pool.events[i]; 2454 if (!ibmvfc_event_is_free(evt)) { 2455 if (match(evt, device)) { 2456 evt->eh_comp = ∁ 2457 wait++; 2458 } 2459 } 2460 } 2461 spin_unlock(&queues[q_index].l_lock); 2462 } 2463 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2464 2465 if (wait) { 2466 timeout = wait_for_completion_timeout(&comp, timeout); 2467 2468 if (!timeout) { 2469 wait = 0; 2470 spin_lock_irqsave(vhost->host->host_lock, flags); 2471 for (q_index = 0; q_index < q_size; q_index++) { 2472 spin_lock(&queues[q_index].l_lock); 2473 for (i = 0; i < queues[q_index].evt_pool.size; i++) { 2474 evt = &queues[q_index].evt_pool.events[i]; 2475 if (!ibmvfc_event_is_free(evt)) { 2476 if (match(evt, device)) { 2477 evt->eh_comp = NULL; 2478 wait++; 2479 } 2480 } 2481 } 2482 spin_unlock(&queues[q_index].l_lock); 2483 } 2484 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2485 if (wait) 2486 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2487 LEAVE; 2488 return wait ? FAILED : SUCCESS; 2489 } 2490 } 2491 } while (wait); 2492 2493 LEAVE; 2494 return SUCCESS; 2495 } 2496 2497 static struct ibmvfc_event *ibmvfc_init_tmf(struct ibmvfc_queue *queue, 2498 struct scsi_device *sdev, 2499 int type) 2500 { 2501 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2502 struct scsi_target *starget = scsi_target(sdev); 2503 struct fc_rport *rport = starget_to_rport(starget); 2504 struct ibmvfc_event *evt; 2505 struct ibmvfc_tmf *tmf; 2506 2507 evt = ibmvfc_get_event(queue); 2508 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2509 2510 tmf = &evt->iu.tmf; 2511 memset(tmf, 0, sizeof(*tmf)); 2512 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 2513 tmf->common.version = cpu_to_be32(2); 2514 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2515 } else { 2516 tmf->common.version = cpu_to_be32(1); 2517 } 2518 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2519 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2520 tmf->scsi_id = cpu_to_be64(rport->port_id); 2521 int_to_scsilun(sdev->lun, &tmf->lun); 2522 if (!ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPRESS_ABTS)) 2523 type &= ~IBMVFC_TMF_SUPPRESS_ABTS; 2524 if (vhost->state == IBMVFC_ACTIVE) 2525 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); 2526 else 2527 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); 2528 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2529 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); 2530 2531 init_completion(&evt->comp); 2532 2533 return evt; 2534 } 2535 2536 static int ibmvfc_cancel_all_mq(struct scsi_device *sdev, int type) 2537 { 2538 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2539 struct ibmvfc_event *evt, *found_evt, *temp; 2540 struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; 2541 unsigned long flags; 2542 int num_hwq, i; 2543 int fail = 0; 2544 LIST_HEAD(cancelq); 2545 u16 status; 2546 2547 ENTER; 2548 spin_lock_irqsave(vhost->host->host_lock, flags); 2549 num_hwq = vhost->scsi_scrqs.active_queues; 2550 for (i = 0; i < num_hwq; i++) { 2551 spin_lock(queues[i].q_lock); 2552 spin_lock(&queues[i].l_lock); 2553 found_evt = NULL; 2554 list_for_each_entry(evt, &queues[i].sent, queue_list) { 2555 if (evt->cmnd && evt->cmnd->device == sdev) { 2556 found_evt = evt; 2557 break; 2558 } 2559 } 2560 spin_unlock(&queues[i].l_lock); 2561 2562 if (found_evt && vhost->logged_in) { 2563 evt = ibmvfc_init_tmf(&queues[i], sdev, type); 2564 evt->sync_iu = &queues[i].cancel_rsp; 2565 ibmvfc_send_event(evt, vhost, default_timeout); 2566 list_add_tail(&evt->cancel, &cancelq); 2567 } 2568 2569 spin_unlock(queues[i].q_lock); 2570 } 2571 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2572 2573 if (list_empty(&cancelq)) { 2574 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2575 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2576 return 0; 2577 } 2578 2579 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2580 2581 list_for_each_entry_safe(evt, temp, &cancelq, cancel) { 2582 wait_for_completion(&evt->comp); 2583 status = be16_to_cpu(evt->queue->cancel_rsp.mad_common.status); 2584 list_del(&evt->cancel); 2585 ibmvfc_free_event(evt); 2586 2587 if (status != IBMVFC_MAD_SUCCESS) { 2588 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2589 switch (status) { 2590 case IBMVFC_MAD_DRIVER_FAILED: 2591 case IBMVFC_MAD_CRQ_ERROR: 2592 /* Host adapter most likely going through reset, return success to 2593 * the caller will wait for the command being cancelled to get returned 2594 */ 2595 break; 2596 default: 2597 fail = 1; 2598 break; 2599 } 2600 } 2601 } 2602 2603 if (fail) 2604 return -EIO; 2605 2606 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2607 LEAVE; 2608 return 0; 2609 } 2610 2611 static int ibmvfc_cancel_all_sq(struct scsi_device *sdev, int type) 2612 { 2613 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2614 struct ibmvfc_event *evt, *found_evt; 2615 union ibmvfc_iu rsp; 2616 int rsp_rc = -EBUSY; 2617 unsigned long flags; 2618 u16 status; 2619 2620 ENTER; 2621 found_evt = NULL; 2622 spin_lock_irqsave(vhost->host->host_lock, flags); 2623 spin_lock(&vhost->crq.l_lock); 2624 list_for_each_entry(evt, &vhost->crq.sent, queue_list) { 2625 if (evt->cmnd && evt->cmnd->device == sdev) { 2626 found_evt = evt; 2627 break; 2628 } 2629 } 2630 spin_unlock(&vhost->crq.l_lock); 2631 2632 if (!found_evt) { 2633 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2634 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2635 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2636 return 0; 2637 } 2638 2639 if (vhost->logged_in) { 2640 evt = ibmvfc_init_tmf(&vhost->crq, sdev, type); 2641 evt->sync_iu = &rsp; 2642 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2643 } 2644 2645 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2646 2647 if (rsp_rc != 0) { 2648 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2649 /* If failure is received, the host adapter is most likely going 2650 through reset, return success so the caller will wait for the command 2651 being cancelled to get returned */ 2652 return 0; 2653 } 2654 2655 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2656 2657 wait_for_completion(&evt->comp); 2658 status = be16_to_cpu(rsp.mad_common.status); 2659 spin_lock_irqsave(vhost->host->host_lock, flags); 2660 ibmvfc_free_event(evt); 2661 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2662 2663 if (status != IBMVFC_MAD_SUCCESS) { 2664 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2665 switch (status) { 2666 case IBMVFC_MAD_DRIVER_FAILED: 2667 case IBMVFC_MAD_CRQ_ERROR: 2668 /* Host adapter most likely going through reset, return success to 2669 the caller will wait for the command being cancelled to get returned */ 2670 return 0; 2671 default: 2672 return -EIO; 2673 }; 2674 } 2675 2676 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2677 return 0; 2678 } 2679 2680 /** 2681 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2682 * @sdev: scsi device to cancel commands 2683 * @type: type of error recovery being performed 2684 * 2685 * This sends a cancel to the VIOS for the specified device. This does 2686 * NOT send any abort to the actual device. That must be done separately. 2687 * 2688 * Returns: 2689 * 0 on success / other on failure 2690 **/ 2691 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2692 { 2693 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2694 2695 if (vhost->mq_enabled && vhost->using_channels) 2696 return ibmvfc_cancel_all_mq(sdev, type); 2697 else 2698 return ibmvfc_cancel_all_sq(sdev, type); 2699 } 2700 2701 /** 2702 * ibmvfc_match_key - Match function for specified cancel key 2703 * @evt: ibmvfc event struct 2704 * @key: cancel key to match 2705 * 2706 * Returns: 2707 * 1 if event matches key / 0 if event does not match key 2708 **/ 2709 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2710 { 2711 unsigned long cancel_key = (unsigned long)key; 2712 2713 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2714 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) 2715 return 1; 2716 return 0; 2717 } 2718 2719 /** 2720 * ibmvfc_match_evt - Match function for specified event 2721 * @evt: ibmvfc event struct 2722 * @match: event to match 2723 * 2724 * Returns: 2725 * 1 if event matches key / 0 if event does not match key 2726 **/ 2727 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) 2728 { 2729 if (evt == match) 2730 return 1; 2731 return 0; 2732 } 2733 2734 /** 2735 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2736 * @sdev: scsi device to abort commands 2737 * 2738 * This sends an Abort Task Set to the VIOS for the specified device. This does 2739 * NOT send any cancel to the VIOS. That must be done separately. 2740 * 2741 * Returns: 2742 * 0 on success / other on failure 2743 **/ 2744 static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2745 { 2746 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2747 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2748 struct ibmvfc_cmd *tmf; 2749 struct ibmvfc_event *evt, *found_evt; 2750 union ibmvfc_iu rsp_iu; 2751 struct ibmvfc_fcp_cmd_iu *iu; 2752 struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); 2753 int rc, rsp_rc = -EBUSY; 2754 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2755 int rsp_code = 0; 2756 2757 found_evt = NULL; 2758 spin_lock_irqsave(vhost->host->host_lock, flags); 2759 spin_lock(&vhost->crq.l_lock); 2760 list_for_each_entry(evt, &vhost->crq.sent, queue_list) { 2761 if (evt->cmnd && evt->cmnd->device == sdev) { 2762 found_evt = evt; 2763 break; 2764 } 2765 } 2766 spin_unlock(&vhost->crq.l_lock); 2767 2768 if (!found_evt) { 2769 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2770 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2771 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2772 return 0; 2773 } 2774 2775 if (vhost->state == IBMVFC_ACTIVE) { 2776 evt = ibmvfc_get_event(&vhost->crq); 2777 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2778 tmf = ibmvfc_init_vfc_cmd(evt, sdev); 2779 iu = ibmvfc_get_fcp_iu(vhost, tmf); 2780 2781 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 2782 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2783 iu->tmf_flags = IBMVFC_ABORT_TASK_SET; 2784 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2785 evt->sync_iu = &rsp_iu; 2786 2787 tmf->correlation = cpu_to_be64((u64)evt); 2788 2789 init_completion(&evt->comp); 2790 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2791 } 2792 2793 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2794 2795 if (rsp_rc != 0) { 2796 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2797 return -EIO; 2798 } 2799 2800 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2801 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2802 2803 if (!timeout) { 2804 rc = ibmvfc_cancel_all(sdev, 0); 2805 if (!rc) { 2806 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2807 if (rc == SUCCESS) 2808 rc = 0; 2809 } 2810 2811 if (rc) { 2812 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2813 ibmvfc_reset_host(vhost); 2814 rsp_rc = -EIO; 2815 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2816 2817 if (rc == SUCCESS) 2818 rsp_rc = 0; 2819 2820 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); 2821 if (rc != SUCCESS) { 2822 spin_lock_irqsave(vhost->host->host_lock, flags); 2823 ibmvfc_hard_reset_host(vhost); 2824 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2825 rsp_rc = 0; 2826 } 2827 2828 goto out; 2829 } 2830 } 2831 2832 if (rsp_iu.cmd.status) 2833 rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); 2834 2835 if (rsp_code) { 2836 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2837 rsp_code = fc_rsp->data.info.rsp_code; 2838 2839 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2840 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2841 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2842 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, 2843 fc_rsp->scsi_status); 2844 rsp_rc = -EIO; 2845 } else 2846 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2847 2848 out: 2849 spin_lock_irqsave(vhost->host->host_lock, flags); 2850 ibmvfc_free_event(evt); 2851 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2852 return rsp_rc; 2853 } 2854 2855 /** 2856 * ibmvfc_eh_abort_handler - Abort a command 2857 * @cmd: scsi command to abort 2858 * 2859 * Returns: 2860 * SUCCESS / FAST_IO_FAIL / FAILED 2861 **/ 2862 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2863 { 2864 struct scsi_device *sdev = cmd->device; 2865 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2866 int cancel_rc, block_rc; 2867 int rc = FAILED; 2868 2869 ENTER; 2870 block_rc = fc_block_scsi_eh(cmd); 2871 ibmvfc_wait_while_resetting(vhost); 2872 if (block_rc != FAST_IO_FAIL) { 2873 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2874 ibmvfc_abort_task_set(sdev); 2875 } else 2876 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2877 2878 if (!cancel_rc) 2879 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2880 2881 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2882 rc = FAST_IO_FAIL; 2883 2884 LEAVE; 2885 return rc; 2886 } 2887 2888 /** 2889 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2890 * @cmd: scsi command struct 2891 * 2892 * Returns: 2893 * SUCCESS / FAST_IO_FAIL / FAILED 2894 **/ 2895 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2896 { 2897 struct scsi_device *sdev = cmd->device; 2898 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2899 int cancel_rc, block_rc, reset_rc = 0; 2900 int rc = FAILED; 2901 2902 ENTER; 2903 block_rc = fc_block_scsi_eh(cmd); 2904 ibmvfc_wait_while_resetting(vhost); 2905 if (block_rc != FAST_IO_FAIL) { 2906 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2907 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2908 } else 2909 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2910 2911 if (!cancel_rc && !reset_rc) 2912 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2913 2914 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2915 rc = FAST_IO_FAIL; 2916 2917 LEAVE; 2918 return rc; 2919 } 2920 2921 /** 2922 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function 2923 * @sdev: scsi device struct 2924 * @data: return code 2925 * 2926 **/ 2927 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) 2928 { 2929 unsigned long *rc = data; 2930 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2931 } 2932 2933 /** 2934 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2935 * @sdev: scsi device struct 2936 * @data: return code 2937 * 2938 **/ 2939 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2940 { 2941 unsigned long *rc = data; 2942 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2943 } 2944 2945 /** 2946 * ibmvfc_eh_target_reset_handler - Reset the target 2947 * @cmd: scsi command struct 2948 * 2949 * Returns: 2950 * SUCCESS / FAST_IO_FAIL / FAILED 2951 **/ 2952 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2953 { 2954 struct scsi_device *sdev = cmd->device; 2955 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2956 struct scsi_target *starget = scsi_target(sdev); 2957 int block_rc; 2958 int reset_rc = 0; 2959 int rc = FAILED; 2960 unsigned long cancel_rc = 0; 2961 2962 ENTER; 2963 block_rc = fc_block_scsi_eh(cmd); 2964 ibmvfc_wait_while_resetting(vhost); 2965 if (block_rc != FAST_IO_FAIL) { 2966 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2967 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2968 } else 2969 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); 2970 2971 if (!cancel_rc && !reset_rc) 2972 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2973 2974 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2975 rc = FAST_IO_FAIL; 2976 2977 LEAVE; 2978 return rc; 2979 } 2980 2981 /** 2982 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2983 * @cmd: struct scsi_cmnd having problems 2984 * 2985 **/ 2986 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2987 { 2988 int rc; 2989 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2990 2991 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2992 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2993 2994 return rc ? FAILED : SUCCESS; 2995 } 2996 2997 /** 2998 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2999 * @rport: rport struct 3000 * 3001 * Return value: 3002 * none 3003 **/ 3004 static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 3005 { 3006 struct Scsi_Host *shost = rport_to_shost(rport); 3007 struct ibmvfc_host *vhost = shost_priv(shost); 3008 struct fc_rport *dev_rport; 3009 struct scsi_device *sdev; 3010 struct ibmvfc_target *tgt; 3011 unsigned long rc, flags; 3012 unsigned int found; 3013 3014 ENTER; 3015 shost_for_each_device(sdev, shost) { 3016 dev_rport = starget_to_rport(scsi_target(sdev)); 3017 if (dev_rport != rport) 3018 continue; 3019 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 3020 } 3021 3022 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 3023 3024 if (rc == FAILED) 3025 ibmvfc_issue_fc_host_lip(shost); 3026 3027 spin_lock_irqsave(shost->host_lock, flags); 3028 found = 0; 3029 list_for_each_entry(tgt, &vhost->targets, queue) { 3030 if (tgt->scsi_id == rport->port_id) { 3031 found++; 3032 break; 3033 } 3034 } 3035 3036 if (found && tgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 3037 /* 3038 * If we get here, that means we previously attempted to send 3039 * an implicit logout to the target but it failed, most likely 3040 * due to I/O being pending, so we need to send it again 3041 */ 3042 ibmvfc_del_tgt(tgt); 3043 ibmvfc_reinit_host(vhost); 3044 } 3045 3046 spin_unlock_irqrestore(shost->host_lock, flags); 3047 LEAVE; 3048 } 3049 3050 static const struct ibmvfc_async_desc ae_desc [] = { 3051 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3052 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3053 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3054 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3055 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3056 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, 3057 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, 3058 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, 3059 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, 3060 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, 3061 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, 3062 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, 3063 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, 3064 }; 3065 3066 static const struct ibmvfc_async_desc unknown_ae = { 3067 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL 3068 }; 3069 3070 /** 3071 * ibmvfc_get_ae_desc - Get text description for async event 3072 * @ae: async event 3073 * 3074 **/ 3075 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 3076 { 3077 int i; 3078 3079 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 3080 if (ae_desc[i].ae == ae) 3081 return &ae_desc[i]; 3082 3083 return &unknown_ae; 3084 } 3085 3086 static const struct { 3087 enum ibmvfc_ae_link_state state; 3088 const char *desc; 3089 } link_desc [] = { 3090 { IBMVFC_AE_LS_LINK_UP, " link up" }, 3091 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 3092 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 3093 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 3094 }; 3095 3096 /** 3097 * ibmvfc_get_link_state - Get text description for link state 3098 * @state: link state 3099 * 3100 **/ 3101 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 3102 { 3103 int i; 3104 3105 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 3106 if (link_desc[i].state == state) 3107 return link_desc[i].desc; 3108 3109 return ""; 3110 } 3111 3112 /** 3113 * ibmvfc_handle_async - Handle an async event from the adapter 3114 * @crq: crq to process 3115 * @vhost: ibmvfc host struct 3116 * 3117 **/ 3118 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 3119 struct ibmvfc_host *vhost) 3120 { 3121 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); 3122 struct ibmvfc_target *tgt; 3123 3124 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 3125 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id), 3126 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name), 3127 ibmvfc_get_link_state(crq->link_state)); 3128 3129 switch (be64_to_cpu(crq->event)) { 3130 case IBMVFC_AE_RESUME: 3131 switch (crq->link_state) { 3132 case IBMVFC_AE_LS_LINK_DOWN: 3133 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3134 break; 3135 case IBMVFC_AE_LS_LINK_DEAD: 3136 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3137 break; 3138 case IBMVFC_AE_LS_LINK_UP: 3139 case IBMVFC_AE_LS_LINK_BOUNCED: 3140 default: 3141 vhost->events_to_log |= IBMVFC_AE_LINKUP; 3142 vhost->delay_init = 1; 3143 __ibmvfc_reset_host(vhost); 3144 break; 3145 } 3146 3147 break; 3148 case IBMVFC_AE_LINK_UP: 3149 vhost->events_to_log |= IBMVFC_AE_LINKUP; 3150 vhost->delay_init = 1; 3151 __ibmvfc_reset_host(vhost); 3152 break; 3153 case IBMVFC_AE_SCN_FABRIC: 3154 case IBMVFC_AE_SCN_DOMAIN: 3155 vhost->events_to_log |= IBMVFC_AE_RSCN; 3156 if (vhost->state < IBMVFC_HALTED) { 3157 vhost->delay_init = 1; 3158 __ibmvfc_reset_host(vhost); 3159 } 3160 break; 3161 case IBMVFC_AE_SCN_NPORT: 3162 case IBMVFC_AE_SCN_GROUP: 3163 vhost->events_to_log |= IBMVFC_AE_RSCN; 3164 ibmvfc_reinit_host(vhost); 3165 break; 3166 case IBMVFC_AE_ELS_LOGO: 3167 case IBMVFC_AE_ELS_PRLO: 3168 case IBMVFC_AE_ELS_PLOGI: 3169 list_for_each_entry(tgt, &vhost->targets, queue) { 3170 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 3171 break; 3172 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) 3173 continue; 3174 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) 3175 continue; 3176 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) 3177 continue; 3178 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) 3179 tgt->logo_rcvd = 1; 3180 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { 3181 ibmvfc_del_tgt(tgt); 3182 ibmvfc_reinit_host(vhost); 3183 } 3184 } 3185 break; 3186 case IBMVFC_AE_LINK_DOWN: 3187 case IBMVFC_AE_ADAPTER_FAILED: 3188 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3189 break; 3190 case IBMVFC_AE_LINK_DEAD: 3191 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3192 break; 3193 case IBMVFC_AE_HALT: 3194 ibmvfc_link_down(vhost, IBMVFC_HALTED); 3195 break; 3196 default: 3197 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 3198 break; 3199 } 3200 } 3201 3202 /** 3203 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 3204 * @crq: Command/Response queue 3205 * @vhost: ibmvfc host struct 3206 * @evt_doneq: Event done queue 3207 * 3208 **/ 3209 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost, 3210 struct list_head *evt_doneq) 3211 { 3212 long rc; 3213 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 3214 3215 switch (crq->valid) { 3216 case IBMVFC_CRQ_INIT_RSP: 3217 switch (crq->format) { 3218 case IBMVFC_CRQ_INIT: 3219 dev_info(vhost->dev, "Partner initialized\n"); 3220 /* Send back a response */ 3221 rc = ibmvfc_send_crq_init_complete(vhost); 3222 if (rc == 0) 3223 ibmvfc_init_host(vhost); 3224 else 3225 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 3226 break; 3227 case IBMVFC_CRQ_INIT_COMPLETE: 3228 dev_info(vhost->dev, "Partner initialization complete\n"); 3229 ibmvfc_init_host(vhost); 3230 break; 3231 default: 3232 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 3233 } 3234 return; 3235 case IBMVFC_CRQ_XPORT_EVENT: 3236 vhost->state = IBMVFC_NO_CRQ; 3237 vhost->logged_in = 0; 3238 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3239 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 3240 /* We need to re-setup the interpartition connection */ 3241 dev_info(vhost->dev, "Partition migrated, Re-enabling adapter\n"); 3242 vhost->client_migrated = 1; 3243 3244 scsi_block_requests(vhost->host); 3245 ibmvfc_purge_requests(vhost, DID_REQUEUE); 3246 ibmvfc_set_host_state(vhost, IBMVFC_LINK_DOWN); 3247 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 3248 wake_up(&vhost->work_wait_q); 3249 } else if (crq->format == IBMVFC_PARTNER_FAILED || crq->format == IBMVFC_PARTNER_DEREGISTER) { 3250 dev_err(vhost->dev, "Host partner adapter deregistered or failed (rc=%d)\n", crq->format); 3251 ibmvfc_purge_requests(vhost, DID_ERROR); 3252 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3253 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 3254 } else { 3255 dev_err(vhost->dev, "Received unknown transport event from partner (rc=%d)\n", crq->format); 3256 } 3257 return; 3258 case IBMVFC_CRQ_CMD_RSP: 3259 break; 3260 default: 3261 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 3262 return; 3263 } 3264 3265 if (crq->format == IBMVFC_ASYNC_EVENT) 3266 return; 3267 3268 /* The only kind of payload CRQs we should get are responses to 3269 * things we send. Make sure this response is to something we 3270 * actually sent 3271 */ 3272 if (unlikely(!ibmvfc_valid_event(&vhost->crq.evt_pool, evt))) { 3273 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 3274 crq->ioba); 3275 return; 3276 } 3277 3278 if (unlikely(atomic_dec_if_positive(&evt->active))) { 3279 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 3280 crq->ioba); 3281 return; 3282 } 3283 3284 spin_lock(&evt->queue->l_lock); 3285 list_move_tail(&evt->queue_list, evt_doneq); 3286 spin_unlock(&evt->queue->l_lock); 3287 } 3288 3289 /** 3290 * ibmvfc_scan_finished - Check if the device scan is done. 3291 * @shost: scsi host struct 3292 * @time: current elapsed time 3293 * 3294 * Returns: 3295 * 0 if scan is not done / 1 if scan is done 3296 **/ 3297 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 3298 { 3299 unsigned long flags; 3300 struct ibmvfc_host *vhost = shost_priv(shost); 3301 int done = 0; 3302 3303 spin_lock_irqsave(shost->host_lock, flags); 3304 if (!vhost->scan_timeout) 3305 done = 1; 3306 else if (time >= (vhost->scan_timeout * HZ)) { 3307 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 3308 "continuing initialization\n", vhost->scan_timeout); 3309 done = 1; 3310 } 3311 3312 if (vhost->scan_complete) { 3313 vhost->scan_timeout = init_timeout; 3314 done = 1; 3315 } 3316 spin_unlock_irqrestore(shost->host_lock, flags); 3317 return done; 3318 } 3319 3320 /** 3321 * ibmvfc_slave_alloc - Setup the device's task set value 3322 * @sdev: struct scsi_device device to configure 3323 * 3324 * Set the device's task set value so that error handling works as 3325 * expected. 3326 * 3327 * Returns: 3328 * 0 on success / -ENXIO if device does not exist 3329 **/ 3330 static int ibmvfc_slave_alloc(struct scsi_device *sdev) 3331 { 3332 struct Scsi_Host *shost = sdev->host; 3333 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 3334 struct ibmvfc_host *vhost = shost_priv(shost); 3335 unsigned long flags = 0; 3336 3337 if (!rport || fc_remote_port_chkready(rport)) 3338 return -ENXIO; 3339 3340 spin_lock_irqsave(shost->host_lock, flags); 3341 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 3342 spin_unlock_irqrestore(shost->host_lock, flags); 3343 return 0; 3344 } 3345 3346 /** 3347 * ibmvfc_target_alloc - Setup the target's task set value 3348 * @starget: struct scsi_target 3349 * 3350 * Set the target's task set value so that error handling works as 3351 * expected. 3352 * 3353 * Returns: 3354 * 0 on success / -ENXIO if device does not exist 3355 **/ 3356 static int ibmvfc_target_alloc(struct scsi_target *starget) 3357 { 3358 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 3359 struct ibmvfc_host *vhost = shost_priv(shost); 3360 unsigned long flags = 0; 3361 3362 spin_lock_irqsave(shost->host_lock, flags); 3363 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 3364 spin_unlock_irqrestore(shost->host_lock, flags); 3365 return 0; 3366 } 3367 3368 /** 3369 * ibmvfc_slave_configure - Configure the device 3370 * @sdev: struct scsi_device device to configure 3371 * 3372 * Enable allow_restart for a device if it is a disk. Adjust the 3373 * queue_depth here also. 3374 * 3375 * Returns: 3376 * 0 3377 **/ 3378 static int ibmvfc_slave_configure(struct scsi_device *sdev) 3379 { 3380 struct Scsi_Host *shost = sdev->host; 3381 unsigned long flags = 0; 3382 3383 spin_lock_irqsave(shost->host_lock, flags); 3384 if (sdev->type == TYPE_DISK) { 3385 sdev->allow_restart = 1; 3386 blk_queue_rq_timeout(sdev->request_queue, 120 * HZ); 3387 } 3388 spin_unlock_irqrestore(shost->host_lock, flags); 3389 return 0; 3390 } 3391 3392 /** 3393 * ibmvfc_change_queue_depth - Change the device's queue depth 3394 * @sdev: scsi device struct 3395 * @qdepth: depth to set 3396 * 3397 * Return value: 3398 * actual depth set 3399 **/ 3400 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 3401 { 3402 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 3403 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 3404 3405 return scsi_change_queue_depth(sdev, qdepth); 3406 } 3407 3408 static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 3409 struct device_attribute *attr, char *buf) 3410 { 3411 struct Scsi_Host *shost = class_to_shost(dev); 3412 struct ibmvfc_host *vhost = shost_priv(shost); 3413 3414 return snprintf(buf, PAGE_SIZE, "%s\n", 3415 vhost->login_buf->resp.partition_name); 3416 } 3417 3418 static ssize_t ibmvfc_show_host_device_name(struct device *dev, 3419 struct device_attribute *attr, char *buf) 3420 { 3421 struct Scsi_Host *shost = class_to_shost(dev); 3422 struct ibmvfc_host *vhost = shost_priv(shost); 3423 3424 return snprintf(buf, PAGE_SIZE, "%s\n", 3425 vhost->login_buf->resp.device_name); 3426 } 3427 3428 static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 3429 struct device_attribute *attr, char *buf) 3430 { 3431 struct Scsi_Host *shost = class_to_shost(dev); 3432 struct ibmvfc_host *vhost = shost_priv(shost); 3433 3434 return snprintf(buf, PAGE_SIZE, "%s\n", 3435 vhost->login_buf->resp.port_loc_code); 3436 } 3437 3438 static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 3439 struct device_attribute *attr, char *buf) 3440 { 3441 struct Scsi_Host *shost = class_to_shost(dev); 3442 struct ibmvfc_host *vhost = shost_priv(shost); 3443 3444 return snprintf(buf, PAGE_SIZE, "%s\n", 3445 vhost->login_buf->resp.drc_name); 3446 } 3447 3448 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 3449 struct device_attribute *attr, char *buf) 3450 { 3451 struct Scsi_Host *shost = class_to_shost(dev); 3452 struct ibmvfc_host *vhost = shost_priv(shost); 3453 return snprintf(buf, PAGE_SIZE, "%d\n", be32_to_cpu(vhost->login_buf->resp.version)); 3454 } 3455 3456 static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 3457 struct device_attribute *attr, char *buf) 3458 { 3459 struct Scsi_Host *shost = class_to_shost(dev); 3460 struct ibmvfc_host *vhost = shost_priv(shost); 3461 return snprintf(buf, PAGE_SIZE, "%llx\n", be64_to_cpu(vhost->login_buf->resp.capabilities)); 3462 } 3463 3464 /** 3465 * ibmvfc_show_log_level - Show the adapter's error logging level 3466 * @dev: class device struct 3467 * @attr: unused 3468 * @buf: buffer 3469 * 3470 * Return value: 3471 * number of bytes printed to buffer 3472 **/ 3473 static ssize_t ibmvfc_show_log_level(struct device *dev, 3474 struct device_attribute *attr, char *buf) 3475 { 3476 struct Scsi_Host *shost = class_to_shost(dev); 3477 struct ibmvfc_host *vhost = shost_priv(shost); 3478 unsigned long flags = 0; 3479 int len; 3480 3481 spin_lock_irqsave(shost->host_lock, flags); 3482 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 3483 spin_unlock_irqrestore(shost->host_lock, flags); 3484 return len; 3485 } 3486 3487 /** 3488 * ibmvfc_store_log_level - Change the adapter's error logging level 3489 * @dev: class device struct 3490 * @attr: unused 3491 * @buf: buffer 3492 * @count: buffer size 3493 * 3494 * Return value: 3495 * number of bytes printed to buffer 3496 **/ 3497 static ssize_t ibmvfc_store_log_level(struct device *dev, 3498 struct device_attribute *attr, 3499 const char *buf, size_t count) 3500 { 3501 struct Scsi_Host *shost = class_to_shost(dev); 3502 struct ibmvfc_host *vhost = shost_priv(shost); 3503 unsigned long flags = 0; 3504 3505 spin_lock_irqsave(shost->host_lock, flags); 3506 vhost->log_level = simple_strtoul(buf, NULL, 10); 3507 spin_unlock_irqrestore(shost->host_lock, flags); 3508 return strlen(buf); 3509 } 3510 3511 static ssize_t ibmvfc_show_scsi_channels(struct device *dev, 3512 struct device_attribute *attr, char *buf) 3513 { 3514 struct Scsi_Host *shost = class_to_shost(dev); 3515 struct ibmvfc_host *vhost = shost_priv(shost); 3516 unsigned long flags = 0; 3517 int len; 3518 3519 spin_lock_irqsave(shost->host_lock, flags); 3520 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->client_scsi_channels); 3521 spin_unlock_irqrestore(shost->host_lock, flags); 3522 return len; 3523 } 3524 3525 static ssize_t ibmvfc_store_scsi_channels(struct device *dev, 3526 struct device_attribute *attr, 3527 const char *buf, size_t count) 3528 { 3529 struct Scsi_Host *shost = class_to_shost(dev); 3530 struct ibmvfc_host *vhost = shost_priv(shost); 3531 unsigned long flags = 0; 3532 unsigned int channels; 3533 3534 spin_lock_irqsave(shost->host_lock, flags); 3535 channels = simple_strtoul(buf, NULL, 10); 3536 vhost->client_scsi_channels = min(channels, nr_scsi_hw_queues); 3537 ibmvfc_hard_reset_host(vhost); 3538 spin_unlock_irqrestore(shost->host_lock, flags); 3539 return strlen(buf); 3540 } 3541 3542 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 3543 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 3544 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 3545 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 3546 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 3547 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 3548 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 3549 ibmvfc_show_log_level, ibmvfc_store_log_level); 3550 static DEVICE_ATTR(nr_scsi_channels, S_IRUGO | S_IWUSR, 3551 ibmvfc_show_scsi_channels, ibmvfc_store_scsi_channels); 3552 3553 #ifdef CONFIG_SCSI_IBMVFC_TRACE 3554 /** 3555 * ibmvfc_read_trace - Dump the adapter trace 3556 * @filp: open sysfs file 3557 * @kobj: kobject struct 3558 * @bin_attr: bin_attribute struct 3559 * @buf: buffer 3560 * @off: offset 3561 * @count: buffer size 3562 * 3563 * Return value: 3564 * number of bytes printed to buffer 3565 **/ 3566 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 3567 struct bin_attribute *bin_attr, 3568 char *buf, loff_t off, size_t count) 3569 { 3570 struct device *dev = kobj_to_dev(kobj); 3571 struct Scsi_Host *shost = class_to_shost(dev); 3572 struct ibmvfc_host *vhost = shost_priv(shost); 3573 unsigned long flags = 0; 3574 int size = IBMVFC_TRACE_SIZE; 3575 char *src = (char *)vhost->trace; 3576 3577 if (off > size) 3578 return 0; 3579 if (off + count > size) { 3580 size -= off; 3581 count = size; 3582 } 3583 3584 spin_lock_irqsave(shost->host_lock, flags); 3585 memcpy(buf, &src[off], count); 3586 spin_unlock_irqrestore(shost->host_lock, flags); 3587 return count; 3588 } 3589 3590 static struct bin_attribute ibmvfc_trace_attr = { 3591 .attr = { 3592 .name = "trace", 3593 .mode = S_IRUGO, 3594 }, 3595 .size = 0, 3596 .read = ibmvfc_read_trace, 3597 }; 3598 #endif 3599 3600 static struct attribute *ibmvfc_host_attrs[] = { 3601 &dev_attr_partition_name.attr, 3602 &dev_attr_device_name.attr, 3603 &dev_attr_port_loc_code.attr, 3604 &dev_attr_drc_name.attr, 3605 &dev_attr_npiv_version.attr, 3606 &dev_attr_capabilities.attr, 3607 &dev_attr_log_level.attr, 3608 &dev_attr_nr_scsi_channels.attr, 3609 NULL 3610 }; 3611 3612 ATTRIBUTE_GROUPS(ibmvfc_host); 3613 3614 static struct scsi_host_template driver_template = { 3615 .module = THIS_MODULE, 3616 .name = "IBM POWER Virtual FC Adapter", 3617 .proc_name = IBMVFC_NAME, 3618 .queuecommand = ibmvfc_queuecommand, 3619 .eh_timed_out = fc_eh_timed_out, 3620 .eh_abort_handler = ibmvfc_eh_abort_handler, 3621 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3622 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3623 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3624 .slave_alloc = ibmvfc_slave_alloc, 3625 .slave_configure = ibmvfc_slave_configure, 3626 .target_alloc = ibmvfc_target_alloc, 3627 .scan_finished = ibmvfc_scan_finished, 3628 .change_queue_depth = ibmvfc_change_queue_depth, 3629 .cmd_per_lun = 16, 3630 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3631 .this_id = -1, 3632 .sg_tablesize = SG_ALL, 3633 .max_sectors = IBMVFC_MAX_SECTORS, 3634 .shost_groups = ibmvfc_host_groups, 3635 .track_queue_depth = 1, 3636 .host_tagset = 1, 3637 }; 3638 3639 /** 3640 * ibmvfc_next_async_crq - Returns the next entry in async queue 3641 * @vhost: ibmvfc host struct 3642 * 3643 * Returns: 3644 * Pointer to next entry in queue / NULL if empty 3645 **/ 3646 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3647 { 3648 struct ibmvfc_queue *async_crq = &vhost->async_crq; 3649 struct ibmvfc_async_crq *crq; 3650 3651 crq = &async_crq->msgs.async[async_crq->cur]; 3652 if (crq->valid & 0x80) { 3653 if (++async_crq->cur == async_crq->size) 3654 async_crq->cur = 0; 3655 rmb(); 3656 } else 3657 crq = NULL; 3658 3659 return crq; 3660 } 3661 3662 /** 3663 * ibmvfc_next_crq - Returns the next entry in message queue 3664 * @vhost: ibmvfc host struct 3665 * 3666 * Returns: 3667 * Pointer to next entry in queue / NULL if empty 3668 **/ 3669 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3670 { 3671 struct ibmvfc_queue *queue = &vhost->crq; 3672 struct ibmvfc_crq *crq; 3673 3674 crq = &queue->msgs.crq[queue->cur]; 3675 if (crq->valid & 0x80) { 3676 if (++queue->cur == queue->size) 3677 queue->cur = 0; 3678 rmb(); 3679 } else 3680 crq = NULL; 3681 3682 return crq; 3683 } 3684 3685 /** 3686 * ibmvfc_interrupt - Interrupt handler 3687 * @irq: number of irq to handle, not used 3688 * @dev_instance: ibmvfc_host that received interrupt 3689 * 3690 * Returns: 3691 * IRQ_HANDLED 3692 **/ 3693 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3694 { 3695 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3696 unsigned long flags; 3697 3698 spin_lock_irqsave(vhost->host->host_lock, flags); 3699 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3700 tasklet_schedule(&vhost->tasklet); 3701 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3702 return IRQ_HANDLED; 3703 } 3704 3705 /** 3706 * ibmvfc_tasklet - Interrupt handler tasklet 3707 * @data: ibmvfc host struct 3708 * 3709 * Returns: 3710 * Nothing 3711 **/ 3712 static void ibmvfc_tasklet(void *data) 3713 { 3714 struct ibmvfc_host *vhost = data; 3715 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3716 struct ibmvfc_crq *crq; 3717 struct ibmvfc_async_crq *async; 3718 struct ibmvfc_event *evt, *temp; 3719 unsigned long flags; 3720 int done = 0; 3721 LIST_HEAD(evt_doneq); 3722 3723 spin_lock_irqsave(vhost->host->host_lock, flags); 3724 spin_lock(vhost->crq.q_lock); 3725 while (!done) { 3726 /* Pull all the valid messages off the async CRQ */ 3727 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3728 ibmvfc_handle_async(async, vhost); 3729 async->valid = 0; 3730 wmb(); 3731 } 3732 3733 /* Pull all the valid messages off the CRQ */ 3734 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3735 ibmvfc_handle_crq(crq, vhost, &evt_doneq); 3736 crq->valid = 0; 3737 wmb(); 3738 } 3739 3740 vio_enable_interrupts(vdev); 3741 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3742 vio_disable_interrupts(vdev); 3743 ibmvfc_handle_async(async, vhost); 3744 async->valid = 0; 3745 wmb(); 3746 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3747 vio_disable_interrupts(vdev); 3748 ibmvfc_handle_crq(crq, vhost, &evt_doneq); 3749 crq->valid = 0; 3750 wmb(); 3751 } else 3752 done = 1; 3753 } 3754 3755 spin_unlock(vhost->crq.q_lock); 3756 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3757 3758 list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) { 3759 del_timer(&evt->timer); 3760 list_del(&evt->queue_list); 3761 ibmvfc_trc_end(evt); 3762 evt->done(evt); 3763 } 3764 } 3765 3766 static int ibmvfc_toggle_scrq_irq(struct ibmvfc_queue *scrq, int enable) 3767 { 3768 struct device *dev = scrq->vhost->dev; 3769 struct vio_dev *vdev = to_vio_dev(dev); 3770 unsigned long rc; 3771 int irq_action = H_ENABLE_VIO_INTERRUPT; 3772 3773 if (!enable) 3774 irq_action = H_DISABLE_VIO_INTERRUPT; 3775 3776 rc = plpar_hcall_norets(H_VIOCTL, vdev->unit_address, irq_action, 3777 scrq->hw_irq, 0, 0); 3778 3779 if (rc) 3780 dev_err(dev, "Couldn't %s sub-crq[%lu] irq. rc=%ld\n", 3781 enable ? "enable" : "disable", scrq->hwq_id, rc); 3782 3783 return rc; 3784 } 3785 3786 static void ibmvfc_handle_scrq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost, 3787 struct list_head *evt_doneq) 3788 { 3789 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 3790 3791 switch (crq->valid) { 3792 case IBMVFC_CRQ_CMD_RSP: 3793 break; 3794 case IBMVFC_CRQ_XPORT_EVENT: 3795 return; 3796 default: 3797 dev_err(vhost->dev, "Got and invalid message type 0x%02x\n", crq->valid); 3798 return; 3799 } 3800 3801 /* The only kind of payload CRQs we should get are responses to 3802 * things we send. Make sure this response is to something we 3803 * actually sent 3804 */ 3805 if (unlikely(!ibmvfc_valid_event(&evt->queue->evt_pool, evt))) { 3806 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 3807 crq->ioba); 3808 return; 3809 } 3810 3811 if (unlikely(atomic_dec_if_positive(&evt->active))) { 3812 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 3813 crq->ioba); 3814 return; 3815 } 3816 3817 spin_lock(&evt->queue->l_lock); 3818 list_move_tail(&evt->queue_list, evt_doneq); 3819 spin_unlock(&evt->queue->l_lock); 3820 } 3821 3822 static struct ibmvfc_crq *ibmvfc_next_scrq(struct ibmvfc_queue *scrq) 3823 { 3824 struct ibmvfc_crq *crq; 3825 3826 crq = &scrq->msgs.scrq[scrq->cur].crq; 3827 if (crq->valid & 0x80) { 3828 if (++scrq->cur == scrq->size) 3829 scrq->cur = 0; 3830 rmb(); 3831 } else 3832 crq = NULL; 3833 3834 return crq; 3835 } 3836 3837 static void ibmvfc_drain_sub_crq(struct ibmvfc_queue *scrq) 3838 { 3839 struct ibmvfc_crq *crq; 3840 struct ibmvfc_event *evt, *temp; 3841 unsigned long flags; 3842 int done = 0; 3843 LIST_HEAD(evt_doneq); 3844 3845 spin_lock_irqsave(scrq->q_lock, flags); 3846 while (!done) { 3847 while ((crq = ibmvfc_next_scrq(scrq)) != NULL) { 3848 ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq); 3849 crq->valid = 0; 3850 wmb(); 3851 } 3852 3853 ibmvfc_toggle_scrq_irq(scrq, 1); 3854 if ((crq = ibmvfc_next_scrq(scrq)) != NULL) { 3855 ibmvfc_toggle_scrq_irq(scrq, 0); 3856 ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq); 3857 crq->valid = 0; 3858 wmb(); 3859 } else 3860 done = 1; 3861 } 3862 spin_unlock_irqrestore(scrq->q_lock, flags); 3863 3864 list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) { 3865 del_timer(&evt->timer); 3866 list_del(&evt->queue_list); 3867 ibmvfc_trc_end(evt); 3868 evt->done(evt); 3869 } 3870 } 3871 3872 static irqreturn_t ibmvfc_interrupt_scsi(int irq, void *scrq_instance) 3873 { 3874 struct ibmvfc_queue *scrq = (struct ibmvfc_queue *)scrq_instance; 3875 3876 ibmvfc_toggle_scrq_irq(scrq, 0); 3877 ibmvfc_drain_sub_crq(scrq); 3878 3879 return IRQ_HANDLED; 3880 } 3881 3882 /** 3883 * ibmvfc_init_tgt - Set the next init job step for the target 3884 * @tgt: ibmvfc target struct 3885 * @job_step: job step to perform 3886 * 3887 **/ 3888 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3889 void (*job_step) (struct ibmvfc_target *)) 3890 { 3891 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT)) 3892 tgt->job_step = job_step; 3893 wake_up(&tgt->vhost->work_wait_q); 3894 } 3895 3896 /** 3897 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3898 * @tgt: ibmvfc target struct 3899 * @job_step: initialization job step 3900 * 3901 * Returns: 1 if step will be retried / 0 if not 3902 * 3903 **/ 3904 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3905 void (*job_step) (struct ibmvfc_target *)) 3906 { 3907 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3908 ibmvfc_del_tgt(tgt); 3909 wake_up(&tgt->vhost->work_wait_q); 3910 return 0; 3911 } else 3912 ibmvfc_init_tgt(tgt, job_step); 3913 return 1; 3914 } 3915 3916 /* Defined in FC-LS */ 3917 static const struct { 3918 int code; 3919 int retry; 3920 int logged_in; 3921 } prli_rsp [] = { 3922 { 0, 1, 0 }, 3923 { 1, 0, 1 }, 3924 { 2, 1, 0 }, 3925 { 3, 1, 0 }, 3926 { 4, 0, 0 }, 3927 { 5, 0, 0 }, 3928 { 6, 0, 1 }, 3929 { 7, 0, 0 }, 3930 { 8, 1, 0 }, 3931 }; 3932 3933 /** 3934 * ibmvfc_get_prli_rsp - Find PRLI response index 3935 * @flags: PRLI response flags 3936 * 3937 **/ 3938 static int ibmvfc_get_prli_rsp(u16 flags) 3939 { 3940 int i; 3941 int code = (flags & 0x0f00) >> 8; 3942 3943 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3944 if (prli_rsp[i].code == code) 3945 return i; 3946 3947 return 0; 3948 } 3949 3950 /** 3951 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3952 * @evt: ibmvfc event struct 3953 * 3954 **/ 3955 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3956 { 3957 struct ibmvfc_target *tgt = evt->tgt; 3958 struct ibmvfc_host *vhost = evt->vhost; 3959 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3960 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3961 u32 status = be16_to_cpu(rsp->common.status); 3962 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3963 3964 vhost->discovery_threads--; 3965 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3966 switch (status) { 3967 case IBMVFC_MAD_SUCCESS: 3968 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3969 parms->type, parms->flags, parms->service_parms); 3970 3971 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3972 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); 3973 if (prli_rsp[index].logged_in) { 3974 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { 3975 tgt->need_login = 0; 3976 tgt->ids.roles = 0; 3977 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) 3978 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3979 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) 3980 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3981 tgt->add_rport = 1; 3982 } else 3983 ibmvfc_del_tgt(tgt); 3984 } else if (prli_rsp[index].retry) 3985 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3986 else 3987 ibmvfc_del_tgt(tgt); 3988 } else 3989 ibmvfc_del_tgt(tgt); 3990 break; 3991 case IBMVFC_MAD_DRIVER_FAILED: 3992 break; 3993 case IBMVFC_MAD_CRQ_ERROR: 3994 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3995 break; 3996 case IBMVFC_MAD_FAILED: 3997 default: 3998 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && 3999 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) 4000 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 4001 else if (tgt->logo_rcvd) 4002 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 4003 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4004 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 4005 else 4006 ibmvfc_del_tgt(tgt); 4007 4008 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 4009 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4010 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), status); 4011 break; 4012 } 4013 4014 kref_put(&tgt->kref, ibmvfc_release_tgt); 4015 ibmvfc_free_event(evt); 4016 wake_up(&vhost->work_wait_q); 4017 } 4018 4019 /** 4020 * ibmvfc_tgt_send_prli - Send a process login 4021 * @tgt: ibmvfc target struct 4022 * 4023 **/ 4024 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 4025 { 4026 struct ibmvfc_process_login *prli; 4027 struct ibmvfc_host *vhost = tgt->vhost; 4028 struct ibmvfc_event *evt; 4029 4030 if (vhost->discovery_threads >= disc_threads) 4031 return; 4032 4033 kref_get(&tgt->kref); 4034 evt = ibmvfc_get_event(&vhost->crq); 4035 vhost->discovery_threads++; 4036 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 4037 evt->tgt = tgt; 4038 prli = &evt->iu.prli; 4039 memset(prli, 0, sizeof(*prli)); 4040 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 4041 prli->common.version = cpu_to_be32(2); 4042 prli->target_wwpn = cpu_to_be64(tgt->wwpn); 4043 } else { 4044 prli->common.version = cpu_to_be32(1); 4045 } 4046 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); 4047 prli->common.length = cpu_to_be16(sizeof(*prli)); 4048 prli->scsi_id = cpu_to_be64(tgt->scsi_id); 4049 4050 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 4051 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); 4052 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); 4053 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED); 4054 4055 if (cls3_error) 4056 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY); 4057 4058 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4059 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4060 vhost->discovery_threads--; 4061 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4062 kref_put(&tgt->kref, ibmvfc_release_tgt); 4063 } else 4064 tgt_dbg(tgt, "Sent process login\n"); 4065 } 4066 4067 /** 4068 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 4069 * @evt: ibmvfc event struct 4070 * 4071 **/ 4072 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 4073 { 4074 struct ibmvfc_target *tgt = evt->tgt; 4075 struct ibmvfc_host *vhost = evt->vhost; 4076 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 4077 u32 status = be16_to_cpu(rsp->common.status); 4078 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4079 4080 vhost->discovery_threads--; 4081 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4082 switch (status) { 4083 case IBMVFC_MAD_SUCCESS: 4084 tgt_dbg(tgt, "Port Login succeeded\n"); 4085 if (tgt->ids.port_name && 4086 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 4087 vhost->reinit = 1; 4088 tgt_dbg(tgt, "Port re-init required\n"); 4089 break; 4090 } 4091 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 4092 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 4093 tgt->ids.port_id = tgt->scsi_id; 4094 memcpy(&tgt->service_parms, &rsp->service_parms, 4095 sizeof(tgt->service_parms)); 4096 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 4097 sizeof(tgt->service_parms_change)); 4098 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 4099 break; 4100 case IBMVFC_MAD_DRIVER_FAILED: 4101 break; 4102 case IBMVFC_MAD_CRQ_ERROR: 4103 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 4104 break; 4105 case IBMVFC_MAD_FAILED: 4106 default: 4107 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4108 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 4109 else 4110 ibmvfc_del_tgt(tgt); 4111 4112 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 4113 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4114 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), 4115 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), 4116 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status); 4117 break; 4118 } 4119 4120 kref_put(&tgt->kref, ibmvfc_release_tgt); 4121 ibmvfc_free_event(evt); 4122 wake_up(&vhost->work_wait_q); 4123 } 4124 4125 /** 4126 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 4127 * @tgt: ibmvfc target struct 4128 * 4129 **/ 4130 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 4131 { 4132 struct ibmvfc_port_login *plogi; 4133 struct ibmvfc_host *vhost = tgt->vhost; 4134 struct ibmvfc_event *evt; 4135 4136 if (vhost->discovery_threads >= disc_threads) 4137 return; 4138 4139 kref_get(&tgt->kref); 4140 tgt->logo_rcvd = 0; 4141 evt = ibmvfc_get_event(&vhost->crq); 4142 vhost->discovery_threads++; 4143 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4144 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 4145 evt->tgt = tgt; 4146 plogi = &evt->iu.plogi; 4147 memset(plogi, 0, sizeof(*plogi)); 4148 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 4149 plogi->common.version = cpu_to_be32(2); 4150 plogi->target_wwpn = cpu_to_be64(tgt->wwpn); 4151 } else { 4152 plogi->common.version = cpu_to_be32(1); 4153 } 4154 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 4155 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 4156 plogi->scsi_id = cpu_to_be64(tgt->scsi_id); 4157 4158 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4159 vhost->discovery_threads--; 4160 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4161 kref_put(&tgt->kref, ibmvfc_release_tgt); 4162 } else 4163 tgt_dbg(tgt, "Sent port login\n"); 4164 } 4165 4166 /** 4167 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 4168 * @evt: ibmvfc event struct 4169 * 4170 **/ 4171 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 4172 { 4173 struct ibmvfc_target *tgt = evt->tgt; 4174 struct ibmvfc_host *vhost = evt->vhost; 4175 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 4176 u32 status = be16_to_cpu(rsp->common.status); 4177 4178 vhost->discovery_threads--; 4179 ibmvfc_free_event(evt); 4180 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4181 4182 switch (status) { 4183 case IBMVFC_MAD_SUCCESS: 4184 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 4185 break; 4186 case IBMVFC_MAD_DRIVER_FAILED: 4187 kref_put(&tgt->kref, ibmvfc_release_tgt); 4188 wake_up(&vhost->work_wait_q); 4189 return; 4190 case IBMVFC_MAD_FAILED: 4191 default: 4192 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 4193 break; 4194 } 4195 4196 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 4197 kref_put(&tgt->kref, ibmvfc_release_tgt); 4198 wake_up(&vhost->work_wait_q); 4199 } 4200 4201 /** 4202 * __ibmvfc_tgt_get_implicit_logout_evt - Allocate and init an event for implicit logout 4203 * @tgt: ibmvfc target struct 4204 * @done: Routine to call when the event is responded to 4205 * 4206 * Returns: 4207 * Allocated and initialized ibmvfc_event struct 4208 **/ 4209 static struct ibmvfc_event *__ibmvfc_tgt_get_implicit_logout_evt(struct ibmvfc_target *tgt, 4210 void (*done) (struct ibmvfc_event *)) 4211 { 4212 struct ibmvfc_implicit_logout *mad; 4213 struct ibmvfc_host *vhost = tgt->vhost; 4214 struct ibmvfc_event *evt; 4215 4216 kref_get(&tgt->kref); 4217 evt = ibmvfc_get_event(&vhost->crq); 4218 ibmvfc_init_event(evt, done, IBMVFC_MAD_FORMAT); 4219 evt->tgt = tgt; 4220 mad = &evt->iu.implicit_logout; 4221 memset(mad, 0, sizeof(*mad)); 4222 mad->common.version = cpu_to_be32(1); 4223 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); 4224 mad->common.length = cpu_to_be16(sizeof(*mad)); 4225 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); 4226 return evt; 4227 } 4228 4229 /** 4230 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 4231 * @tgt: ibmvfc target struct 4232 * 4233 **/ 4234 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 4235 { 4236 struct ibmvfc_host *vhost = tgt->vhost; 4237 struct ibmvfc_event *evt; 4238 4239 if (vhost->discovery_threads >= disc_threads) 4240 return; 4241 4242 vhost->discovery_threads++; 4243 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, 4244 ibmvfc_tgt_implicit_logout_done); 4245 4246 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4247 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4248 vhost->discovery_threads--; 4249 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4250 kref_put(&tgt->kref, ibmvfc_release_tgt); 4251 } else 4252 tgt_dbg(tgt, "Sent Implicit Logout\n"); 4253 } 4254 4255 /** 4256 * ibmvfc_tgt_implicit_logout_and_del_done - Completion handler for Implicit Logout MAD 4257 * @evt: ibmvfc event struct 4258 * 4259 **/ 4260 static void ibmvfc_tgt_implicit_logout_and_del_done(struct ibmvfc_event *evt) 4261 { 4262 struct ibmvfc_target *tgt = evt->tgt; 4263 struct ibmvfc_host *vhost = evt->vhost; 4264 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 4265 u32 status = be16_to_cpu(mad->common.status); 4266 4267 vhost->discovery_threads--; 4268 ibmvfc_free_event(evt); 4269 4270 /* 4271 * If our state is IBMVFC_HOST_OFFLINE, we could be unloading the 4272 * driver in which case we need to free up all the targets. If we are 4273 * not unloading, we will still go through a hard reset to get out of 4274 * offline state, so there is no need to track the old targets in that 4275 * case. 4276 */ 4277 if (status == IBMVFC_MAD_SUCCESS || vhost->state == IBMVFC_HOST_OFFLINE) 4278 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4279 else 4280 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT); 4281 4282 tgt_dbg(tgt, "Implicit Logout %s\n", (status == IBMVFC_MAD_SUCCESS) ? "succeeded" : "failed"); 4283 kref_put(&tgt->kref, ibmvfc_release_tgt); 4284 wake_up(&vhost->work_wait_q); 4285 } 4286 4287 /** 4288 * ibmvfc_tgt_implicit_logout_and_del - Initiate an Implicit Logout for specified target 4289 * @tgt: ibmvfc target struct 4290 * 4291 **/ 4292 static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *tgt) 4293 { 4294 struct ibmvfc_host *vhost = tgt->vhost; 4295 struct ibmvfc_event *evt; 4296 4297 if (!vhost->logged_in) { 4298 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4299 return; 4300 } 4301 4302 if (vhost->discovery_threads >= disc_threads) 4303 return; 4304 4305 vhost->discovery_threads++; 4306 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, 4307 ibmvfc_tgt_implicit_logout_and_del_done); 4308 4309 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT); 4310 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4311 vhost->discovery_threads--; 4312 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4313 kref_put(&tgt->kref, ibmvfc_release_tgt); 4314 } else 4315 tgt_dbg(tgt, "Sent Implicit Logout\n"); 4316 } 4317 4318 /** 4319 * ibmvfc_tgt_move_login_done - Completion handler for Move Login 4320 * @evt: ibmvfc event struct 4321 * 4322 **/ 4323 static void ibmvfc_tgt_move_login_done(struct ibmvfc_event *evt) 4324 { 4325 struct ibmvfc_target *tgt = evt->tgt; 4326 struct ibmvfc_host *vhost = evt->vhost; 4327 struct ibmvfc_move_login *rsp = &evt->xfer_iu->move_login; 4328 u32 status = be16_to_cpu(rsp->common.status); 4329 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4330 4331 vhost->discovery_threads--; 4332 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4333 switch (status) { 4334 case IBMVFC_MAD_SUCCESS: 4335 tgt_dbg(tgt, "Move Login succeeded for new scsi_id: %llX\n", tgt->new_scsi_id); 4336 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 4337 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 4338 tgt->scsi_id = tgt->new_scsi_id; 4339 tgt->ids.port_id = tgt->scsi_id; 4340 memcpy(&tgt->service_parms, &rsp->service_parms, 4341 sizeof(tgt->service_parms)); 4342 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 4343 sizeof(tgt->service_parms_change)); 4344 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 4345 break; 4346 case IBMVFC_MAD_DRIVER_FAILED: 4347 break; 4348 case IBMVFC_MAD_CRQ_ERROR: 4349 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); 4350 break; 4351 case IBMVFC_MAD_FAILED: 4352 default: 4353 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); 4354 4355 tgt_log(tgt, level, 4356 "Move Login failed: new scsi_id: %llX, flags:%x, vios_flags:%x, rc=0x%02X\n", 4357 tgt->new_scsi_id, be32_to_cpu(rsp->flags), be16_to_cpu(rsp->vios_flags), 4358 status); 4359 break; 4360 } 4361 4362 kref_put(&tgt->kref, ibmvfc_release_tgt); 4363 ibmvfc_free_event(evt); 4364 wake_up(&vhost->work_wait_q); 4365 } 4366 4367 4368 /** 4369 * ibmvfc_tgt_move_login - Initiate a move login for specified target 4370 * @tgt: ibmvfc target struct 4371 * 4372 **/ 4373 static void ibmvfc_tgt_move_login(struct ibmvfc_target *tgt) 4374 { 4375 struct ibmvfc_host *vhost = tgt->vhost; 4376 struct ibmvfc_move_login *move; 4377 struct ibmvfc_event *evt; 4378 4379 if (vhost->discovery_threads >= disc_threads) 4380 return; 4381 4382 kref_get(&tgt->kref); 4383 evt = ibmvfc_get_event(&vhost->crq); 4384 vhost->discovery_threads++; 4385 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4386 ibmvfc_init_event(evt, ibmvfc_tgt_move_login_done, IBMVFC_MAD_FORMAT); 4387 evt->tgt = tgt; 4388 move = &evt->iu.move_login; 4389 memset(move, 0, sizeof(*move)); 4390 move->common.version = cpu_to_be32(1); 4391 move->common.opcode = cpu_to_be32(IBMVFC_MOVE_LOGIN); 4392 move->common.length = cpu_to_be16(sizeof(*move)); 4393 4394 move->old_scsi_id = cpu_to_be64(tgt->scsi_id); 4395 move->new_scsi_id = cpu_to_be64(tgt->new_scsi_id); 4396 move->wwpn = cpu_to_be64(tgt->wwpn); 4397 move->node_name = cpu_to_be64(tgt->ids.node_name); 4398 4399 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4400 vhost->discovery_threads--; 4401 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4402 kref_put(&tgt->kref, ibmvfc_release_tgt); 4403 } else 4404 tgt_dbg(tgt, "Sent Move Login for new scsi_id: %llX\n", tgt->new_scsi_id); 4405 } 4406 4407 /** 4408 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 4409 * @mad: ibmvfc passthru mad struct 4410 * @tgt: ibmvfc target struct 4411 * 4412 * Returns: 4413 * 1 if PLOGI needed / 0 if PLOGI not needed 4414 **/ 4415 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 4416 struct ibmvfc_target *tgt) 4417 { 4418 if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name) 4419 return 1; 4420 if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name) 4421 return 1; 4422 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) 4423 return 1; 4424 return 0; 4425 } 4426 4427 /** 4428 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 4429 * @evt: ibmvfc event struct 4430 * 4431 **/ 4432 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 4433 { 4434 struct ibmvfc_target *tgt = evt->tgt; 4435 struct ibmvfc_host *vhost = evt->vhost; 4436 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 4437 u32 status = be16_to_cpu(mad->common.status); 4438 u8 fc_reason, fc_explain; 4439 4440 vhost->discovery_threads--; 4441 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4442 del_timer(&tgt->timer); 4443 4444 switch (status) { 4445 case IBMVFC_MAD_SUCCESS: 4446 tgt_dbg(tgt, "ADISC succeeded\n"); 4447 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 4448 ibmvfc_del_tgt(tgt); 4449 break; 4450 case IBMVFC_MAD_DRIVER_FAILED: 4451 break; 4452 case IBMVFC_MAD_FAILED: 4453 default: 4454 ibmvfc_del_tgt(tgt); 4455 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; 4456 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; 4457 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 4458 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), 4459 be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error), 4460 ibmvfc_get_fc_type(fc_reason), fc_reason, 4461 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 4462 break; 4463 } 4464 4465 kref_put(&tgt->kref, ibmvfc_release_tgt); 4466 ibmvfc_free_event(evt); 4467 wake_up(&vhost->work_wait_q); 4468 } 4469 4470 /** 4471 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 4472 * @evt: ibmvfc event struct 4473 * 4474 **/ 4475 static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 4476 { 4477 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 4478 4479 memset(mad, 0, sizeof(*mad)); 4480 mad->common.version = cpu_to_be32(1); 4481 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 4482 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 4483 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 4484 offsetof(struct ibmvfc_passthru_mad, iu)); 4485 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 4486 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 4487 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); 4488 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 4489 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 4490 offsetof(struct ibmvfc_passthru_fc_iu, payload)); 4491 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 4492 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 4493 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 4494 offsetof(struct ibmvfc_passthru_fc_iu, response)); 4495 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); 4496 } 4497 4498 /** 4499 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 4500 * @evt: ibmvfc event struct 4501 * 4502 * Just cleanup this event struct. Everything else is handled by 4503 * the ADISC completion handler. If the ADISC never actually comes 4504 * back, we still have the timer running on the ADISC event struct 4505 * which will fire and cause the CRQ to get reset. 4506 * 4507 **/ 4508 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 4509 { 4510 struct ibmvfc_host *vhost = evt->vhost; 4511 struct ibmvfc_target *tgt = evt->tgt; 4512 4513 tgt_dbg(tgt, "ADISC cancel complete\n"); 4514 vhost->abort_threads--; 4515 ibmvfc_free_event(evt); 4516 kref_put(&tgt->kref, ibmvfc_release_tgt); 4517 wake_up(&vhost->work_wait_q); 4518 } 4519 4520 /** 4521 * ibmvfc_adisc_timeout - Handle an ADISC timeout 4522 * @t: ibmvfc target struct 4523 * 4524 * If an ADISC times out, send a cancel. If the cancel times 4525 * out, reset the CRQ. When the ADISC comes back as cancelled, 4526 * log back into the target. 4527 **/ 4528 static void ibmvfc_adisc_timeout(struct timer_list *t) 4529 { 4530 struct ibmvfc_target *tgt = from_timer(tgt, t, timer); 4531 struct ibmvfc_host *vhost = tgt->vhost; 4532 struct ibmvfc_event *evt; 4533 struct ibmvfc_tmf *tmf; 4534 unsigned long flags; 4535 int rc; 4536 4537 tgt_dbg(tgt, "ADISC timeout\n"); 4538 spin_lock_irqsave(vhost->host->host_lock, flags); 4539 if (vhost->abort_threads >= disc_threads || 4540 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 4541 vhost->state != IBMVFC_INITIALIZING || 4542 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 4543 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4544 return; 4545 } 4546 4547 vhost->abort_threads++; 4548 kref_get(&tgt->kref); 4549 evt = ibmvfc_get_event(&vhost->crq); 4550 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 4551 4552 evt->tgt = tgt; 4553 tmf = &evt->iu.tmf; 4554 memset(tmf, 0, sizeof(*tmf)); 4555 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 4556 tmf->common.version = cpu_to_be32(2); 4557 tmf->target_wwpn = cpu_to_be64(tgt->wwpn); 4558 } else { 4559 tmf->common.version = cpu_to_be32(1); 4560 } 4561 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 4562 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 4563 tmf->scsi_id = cpu_to_be64(tgt->scsi_id); 4564 tmf->cancel_key = cpu_to_be32(tgt->cancel_key); 4565 4566 rc = ibmvfc_send_event(evt, vhost, default_timeout); 4567 4568 if (rc) { 4569 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 4570 vhost->abort_threads--; 4571 kref_put(&tgt->kref, ibmvfc_release_tgt); 4572 __ibmvfc_reset_host(vhost); 4573 } else 4574 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 4575 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4576 } 4577 4578 /** 4579 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 4580 * @tgt: ibmvfc target struct 4581 * 4582 * When sending an ADISC we end up with two timers running. The 4583 * first timer is the timer in the ibmvfc target struct. If this 4584 * fires, we send a cancel to the target. The second timer is the 4585 * timer on the ibmvfc event for the ADISC, which is longer. If that 4586 * fires, it means the ADISC timed out and our attempt to cancel it 4587 * also failed, so we need to reset the CRQ. 4588 **/ 4589 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 4590 { 4591 struct ibmvfc_passthru_mad *mad; 4592 struct ibmvfc_host *vhost = tgt->vhost; 4593 struct ibmvfc_event *evt; 4594 4595 if (vhost->discovery_threads >= disc_threads) 4596 return; 4597 4598 kref_get(&tgt->kref); 4599 evt = ibmvfc_get_event(&vhost->crq); 4600 vhost->discovery_threads++; 4601 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 4602 evt->tgt = tgt; 4603 4604 ibmvfc_init_passthru(evt); 4605 mad = &evt->iu.passthru; 4606 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); 4607 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); 4608 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); 4609 4610 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); 4611 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 4612 sizeof(vhost->login_buf->resp.port_name)); 4613 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 4614 sizeof(vhost->login_buf->resp.node_name)); 4615 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); 4616 4617 if (timer_pending(&tgt->timer)) 4618 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 4619 else { 4620 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 4621 add_timer(&tgt->timer); 4622 } 4623 4624 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4625 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 4626 vhost->discovery_threads--; 4627 del_timer(&tgt->timer); 4628 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4629 kref_put(&tgt->kref, ibmvfc_release_tgt); 4630 } else 4631 tgt_dbg(tgt, "Sent ADISC\n"); 4632 } 4633 4634 /** 4635 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 4636 * @evt: ibmvfc event struct 4637 * 4638 **/ 4639 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 4640 { 4641 struct ibmvfc_target *tgt = evt->tgt; 4642 struct ibmvfc_host *vhost = evt->vhost; 4643 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 4644 u32 status = be16_to_cpu(rsp->common.status); 4645 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4646 4647 vhost->discovery_threads--; 4648 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4649 switch (status) { 4650 case IBMVFC_MAD_SUCCESS: 4651 tgt_dbg(tgt, "Query Target succeeded\n"); 4652 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) 4653 ibmvfc_del_tgt(tgt); 4654 else 4655 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 4656 break; 4657 case IBMVFC_MAD_DRIVER_FAILED: 4658 break; 4659 case IBMVFC_MAD_CRQ_ERROR: 4660 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 4661 break; 4662 case IBMVFC_MAD_FAILED: 4663 default: 4664 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 4665 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && 4666 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) 4667 ibmvfc_del_tgt(tgt); 4668 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4669 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 4670 else 4671 ibmvfc_del_tgt(tgt); 4672 4673 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 4674 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4675 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), 4676 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), 4677 ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), 4678 status); 4679 break; 4680 } 4681 4682 kref_put(&tgt->kref, ibmvfc_release_tgt); 4683 ibmvfc_free_event(evt); 4684 wake_up(&vhost->work_wait_q); 4685 } 4686 4687 /** 4688 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 4689 * @tgt: ibmvfc target struct 4690 * 4691 **/ 4692 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 4693 { 4694 struct ibmvfc_query_tgt *query_tgt; 4695 struct ibmvfc_host *vhost = tgt->vhost; 4696 struct ibmvfc_event *evt; 4697 4698 if (vhost->discovery_threads >= disc_threads) 4699 return; 4700 4701 kref_get(&tgt->kref); 4702 evt = ibmvfc_get_event(&vhost->crq); 4703 vhost->discovery_threads++; 4704 evt->tgt = tgt; 4705 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 4706 query_tgt = &evt->iu.query_tgt; 4707 memset(query_tgt, 0, sizeof(*query_tgt)); 4708 query_tgt->common.version = cpu_to_be32(1); 4709 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); 4710 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); 4711 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); 4712 4713 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4714 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4715 vhost->discovery_threads--; 4716 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4717 kref_put(&tgt->kref, ibmvfc_release_tgt); 4718 } else 4719 tgt_dbg(tgt, "Sent Query Target\n"); 4720 } 4721 4722 /** 4723 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 4724 * @vhost: ibmvfc host struct 4725 * @target: Holds SCSI ID to allocate target forand the WWPN 4726 * 4727 * Returns: 4728 * 0 on success / other on failure 4729 **/ 4730 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, 4731 struct ibmvfc_discover_targets_entry *target) 4732 { 4733 struct ibmvfc_target *stgt = NULL; 4734 struct ibmvfc_target *wtgt = NULL; 4735 struct ibmvfc_target *tgt; 4736 unsigned long flags; 4737 u64 scsi_id = be32_to_cpu(target->scsi_id) & IBMVFC_DISC_TGT_SCSI_ID_MASK; 4738 u64 wwpn = be64_to_cpu(target->wwpn); 4739 4740 /* Look to see if we already have a target allocated for this SCSI ID or WWPN */ 4741 spin_lock_irqsave(vhost->host->host_lock, flags); 4742 list_for_each_entry(tgt, &vhost->targets, queue) { 4743 if (tgt->wwpn == wwpn) { 4744 wtgt = tgt; 4745 break; 4746 } 4747 } 4748 4749 list_for_each_entry(tgt, &vhost->targets, queue) { 4750 if (tgt->scsi_id == scsi_id) { 4751 stgt = tgt; 4752 break; 4753 } 4754 } 4755 4756 if (wtgt && !stgt) { 4757 /* 4758 * A WWPN target has moved and we still are tracking the old 4759 * SCSI ID. The only way we should be able to get here is if 4760 * we attempted to send an implicit logout for the old SCSI ID 4761 * and it failed for some reason, such as there being I/O 4762 * pending to the target. In this case, we will have already 4763 * deleted the rport from the FC transport so we do a move 4764 * login, which works even with I/O pending, however, if 4765 * there is still I/O pending, it will stay outstanding, so 4766 * we only do this if fast fail is disabled for the rport, 4767 * otherwise we let terminate_rport_io clean up the port 4768 * before we login at the new location. 4769 */ 4770 if (wtgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 4771 if (wtgt->move_login) { 4772 /* 4773 * Do a move login here. The old target is no longer 4774 * known to the transport layer We don't use the 4775 * normal ibmvfc_set_tgt_action to set this, as we 4776 * don't normally want to allow this state change. 4777 */ 4778 wtgt->new_scsi_id = scsi_id; 4779 wtgt->action = IBMVFC_TGT_ACTION_INIT; 4780 wtgt->init_retries = 0; 4781 ibmvfc_init_tgt(wtgt, ibmvfc_tgt_move_login); 4782 } 4783 goto unlock_out; 4784 } else { 4785 tgt_err(wtgt, "Unexpected target state: %d, %p\n", 4786 wtgt->action, wtgt->rport); 4787 } 4788 } else if (stgt) { 4789 if (tgt->need_login) 4790 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 4791 goto unlock_out; 4792 } 4793 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4794 4795 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 4796 memset(tgt, 0, sizeof(*tgt)); 4797 tgt->scsi_id = scsi_id; 4798 tgt->wwpn = wwpn; 4799 tgt->vhost = vhost; 4800 tgt->need_login = 1; 4801 timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0); 4802 kref_init(&tgt->kref); 4803 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 4804 spin_lock_irqsave(vhost->host->host_lock, flags); 4805 tgt->cancel_key = vhost->task_set++; 4806 list_add_tail(&tgt->queue, &vhost->targets); 4807 4808 unlock_out: 4809 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4810 return 0; 4811 } 4812 4813 /** 4814 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 4815 * @vhost: ibmvfc host struct 4816 * 4817 * Returns: 4818 * 0 on success / other on failure 4819 **/ 4820 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 4821 { 4822 int i, rc; 4823 4824 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 4825 rc = ibmvfc_alloc_target(vhost, &vhost->disc_buf[i]); 4826 4827 return rc; 4828 } 4829 4830 /** 4831 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 4832 * @evt: ibmvfc event struct 4833 * 4834 **/ 4835 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 4836 { 4837 struct ibmvfc_host *vhost = evt->vhost; 4838 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 4839 u32 mad_status = be16_to_cpu(rsp->common.status); 4840 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4841 4842 switch (mad_status) { 4843 case IBMVFC_MAD_SUCCESS: 4844 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 4845 vhost->num_targets = be32_to_cpu(rsp->num_written); 4846 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 4847 break; 4848 case IBMVFC_MAD_FAILED: 4849 level += ibmvfc_retry_host_init(vhost); 4850 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 4851 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4852 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); 4853 break; 4854 case IBMVFC_MAD_DRIVER_FAILED: 4855 break; 4856 default: 4857 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 4858 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4859 break; 4860 } 4861 4862 ibmvfc_free_event(evt); 4863 wake_up(&vhost->work_wait_q); 4864 } 4865 4866 /** 4867 * ibmvfc_discover_targets - Send Discover Targets MAD 4868 * @vhost: ibmvfc host struct 4869 * 4870 **/ 4871 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 4872 { 4873 struct ibmvfc_discover_targets *mad; 4874 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); 4875 4876 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 4877 mad = &evt->iu.discover_targets; 4878 memset(mad, 0, sizeof(*mad)); 4879 mad->common.version = cpu_to_be32(1); 4880 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); 4881 mad->common.length = cpu_to_be16(sizeof(*mad)); 4882 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz); 4883 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma); 4884 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz); 4885 mad->flags = cpu_to_be32(IBMVFC_DISC_TGT_PORT_ID_WWPN_LIST); 4886 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4887 4888 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4889 ibmvfc_dbg(vhost, "Sent discover targets\n"); 4890 else 4891 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4892 } 4893 4894 static void ibmvfc_channel_setup_done(struct ibmvfc_event *evt) 4895 { 4896 struct ibmvfc_host *vhost = evt->vhost; 4897 struct ibmvfc_channel_setup *setup = vhost->channel_setup_buf; 4898 struct ibmvfc_scsi_channels *scrqs = &vhost->scsi_scrqs; 4899 u32 mad_status = be16_to_cpu(evt->xfer_iu->channel_setup.common.status); 4900 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4901 int flags, active_queues, i; 4902 4903 ibmvfc_free_event(evt); 4904 4905 switch (mad_status) { 4906 case IBMVFC_MAD_SUCCESS: 4907 ibmvfc_dbg(vhost, "Channel Setup succeeded\n"); 4908 flags = be32_to_cpu(setup->flags); 4909 vhost->do_enquiry = 0; 4910 active_queues = be32_to_cpu(setup->num_scsi_subq_channels); 4911 scrqs->active_queues = active_queues; 4912 4913 if (flags & IBMVFC_CHANNELS_CANCELED) { 4914 ibmvfc_dbg(vhost, "Channels Canceled\n"); 4915 vhost->using_channels = 0; 4916 } else { 4917 if (active_queues) 4918 vhost->using_channels = 1; 4919 for (i = 0; i < active_queues; i++) 4920 scrqs->scrqs[i].vios_cookie = 4921 be64_to_cpu(setup->channel_handles[i]); 4922 4923 ibmvfc_dbg(vhost, "Using %u channels\n", 4924 vhost->scsi_scrqs.active_queues); 4925 } 4926 break; 4927 case IBMVFC_MAD_FAILED: 4928 level += ibmvfc_retry_host_init(vhost); 4929 ibmvfc_log(vhost, level, "Channel Setup failed\n"); 4930 fallthrough; 4931 case IBMVFC_MAD_DRIVER_FAILED: 4932 return; 4933 default: 4934 dev_err(vhost->dev, "Invalid Channel Setup response: 0x%x\n", 4935 mad_status); 4936 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4937 return; 4938 } 4939 4940 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4941 wake_up(&vhost->work_wait_q); 4942 } 4943 4944 static void ibmvfc_channel_setup(struct ibmvfc_host *vhost) 4945 { 4946 struct ibmvfc_channel_setup_mad *mad; 4947 struct ibmvfc_channel_setup *setup_buf = vhost->channel_setup_buf; 4948 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); 4949 struct ibmvfc_scsi_channels *scrqs = &vhost->scsi_scrqs; 4950 unsigned int num_channels = 4951 min(vhost->client_scsi_channels, vhost->max_vios_scsi_channels); 4952 int i; 4953 4954 memset(setup_buf, 0, sizeof(*setup_buf)); 4955 if (num_channels == 0) 4956 setup_buf->flags = cpu_to_be32(IBMVFC_CANCEL_CHANNELS); 4957 else { 4958 setup_buf->num_scsi_subq_channels = cpu_to_be32(num_channels); 4959 for (i = 0; i < num_channels; i++) 4960 setup_buf->channel_handles[i] = cpu_to_be64(scrqs->scrqs[i].cookie); 4961 } 4962 4963 ibmvfc_init_event(evt, ibmvfc_channel_setup_done, IBMVFC_MAD_FORMAT); 4964 mad = &evt->iu.channel_setup; 4965 memset(mad, 0, sizeof(*mad)); 4966 mad->common.version = cpu_to_be32(1); 4967 mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_SETUP); 4968 mad->common.length = cpu_to_be16(sizeof(*mad)); 4969 mad->buffer.va = cpu_to_be64(vhost->channel_setup_dma); 4970 mad->buffer.len = cpu_to_be32(sizeof(*vhost->channel_setup_buf)); 4971 4972 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4973 4974 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4975 ibmvfc_dbg(vhost, "Sent channel setup\n"); 4976 else 4977 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 4978 } 4979 4980 static void ibmvfc_channel_enquiry_done(struct ibmvfc_event *evt) 4981 { 4982 struct ibmvfc_host *vhost = evt->vhost; 4983 struct ibmvfc_channel_enquiry *rsp = &evt->xfer_iu->channel_enquiry; 4984 u32 mad_status = be16_to_cpu(rsp->common.status); 4985 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4986 4987 switch (mad_status) { 4988 case IBMVFC_MAD_SUCCESS: 4989 ibmvfc_dbg(vhost, "Channel Enquiry succeeded\n"); 4990 vhost->max_vios_scsi_channels = be32_to_cpu(rsp->num_scsi_subq_channels); 4991 ibmvfc_free_event(evt); 4992 break; 4993 case IBMVFC_MAD_FAILED: 4994 level += ibmvfc_retry_host_init(vhost); 4995 ibmvfc_log(vhost, level, "Channel Enquiry failed\n"); 4996 fallthrough; 4997 case IBMVFC_MAD_DRIVER_FAILED: 4998 ibmvfc_free_event(evt); 4999 return; 5000 default: 5001 dev_err(vhost->dev, "Invalid Channel Enquiry response: 0x%x\n", 5002 mad_status); 5003 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5004 ibmvfc_free_event(evt); 5005 return; 5006 } 5007 5008 ibmvfc_channel_setup(vhost); 5009 } 5010 5011 static void ibmvfc_channel_enquiry(struct ibmvfc_host *vhost) 5012 { 5013 struct ibmvfc_channel_enquiry *mad; 5014 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); 5015 5016 ibmvfc_init_event(evt, ibmvfc_channel_enquiry_done, IBMVFC_MAD_FORMAT); 5017 mad = &evt->iu.channel_enquiry; 5018 memset(mad, 0, sizeof(*mad)); 5019 mad->common.version = cpu_to_be32(1); 5020 mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_ENQUIRY); 5021 mad->common.length = cpu_to_be16(sizeof(*mad)); 5022 5023 if (mig_channels_only) 5024 mad->flags |= cpu_to_be32(IBMVFC_NO_CHANNELS_TO_CRQ_SUPPORT); 5025 if (mig_no_less_channels) 5026 mad->flags |= cpu_to_be32(IBMVFC_NO_N_TO_M_CHANNELS_SUPPORT); 5027 5028 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 5029 5030 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5031 ibmvfc_dbg(vhost, "Send channel enquiry\n"); 5032 else 5033 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5034 } 5035 5036 /** 5037 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 5038 * @evt: ibmvfc event struct 5039 * 5040 **/ 5041 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 5042 { 5043 struct ibmvfc_host *vhost = evt->vhost; 5044 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); 5045 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 5046 unsigned int npiv_max_sectors; 5047 int level = IBMVFC_DEFAULT_LOG_LEVEL; 5048 5049 switch (mad_status) { 5050 case IBMVFC_MAD_SUCCESS: 5051 ibmvfc_free_event(evt); 5052 break; 5053 case IBMVFC_MAD_FAILED: 5054 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 5055 level += ibmvfc_retry_host_init(vhost); 5056 else 5057 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5058 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 5059 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 5060 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); 5061 ibmvfc_free_event(evt); 5062 return; 5063 case IBMVFC_MAD_CRQ_ERROR: 5064 ibmvfc_retry_host_init(vhost); 5065 fallthrough; 5066 case IBMVFC_MAD_DRIVER_FAILED: 5067 ibmvfc_free_event(evt); 5068 return; 5069 default: 5070 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 5071 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5072 ibmvfc_free_event(evt); 5073 return; 5074 } 5075 5076 vhost->client_migrated = 0; 5077 5078 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { 5079 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 5080 rsp->flags); 5081 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5082 wake_up(&vhost->work_wait_q); 5083 return; 5084 } 5085 5086 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { 5087 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 5088 rsp->max_cmds); 5089 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5090 wake_up(&vhost->work_wait_q); 5091 return; 5092 } 5093 5094 vhost->logged_in = 1; 5095 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); 5096 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 5097 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 5098 rsp->drc_name, npiv_max_sectors); 5099 5100 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); 5101 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); 5102 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); 5103 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); 5104 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 5105 fc_host_supported_classes(vhost->host) = 0; 5106 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) 5107 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 5108 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) 5109 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 5110 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) 5111 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 5112 fc_host_maxframe_size(vhost->host) = 5113 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; 5114 5115 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; 5116 vhost->host->max_sectors = npiv_max_sectors; 5117 5118 if (ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPORT_CHANNELS) && vhost->do_enquiry) { 5119 ibmvfc_channel_enquiry(vhost); 5120 } else { 5121 vhost->do_enquiry = 0; 5122 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 5123 wake_up(&vhost->work_wait_q); 5124 } 5125 } 5126 5127 /** 5128 * ibmvfc_npiv_login - Sends NPIV login 5129 * @vhost: ibmvfc host struct 5130 * 5131 **/ 5132 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 5133 { 5134 struct ibmvfc_npiv_login_mad *mad; 5135 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); 5136 5137 ibmvfc_gather_partition_info(vhost); 5138 ibmvfc_set_login_info(vhost); 5139 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 5140 5141 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 5142 mad = &evt->iu.npiv_login; 5143 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 5144 mad->common.version = cpu_to_be32(1); 5145 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); 5146 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); 5147 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); 5148 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); 5149 5150 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 5151 5152 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5153 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 5154 else 5155 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5156 } 5157 5158 /** 5159 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 5160 * @evt: ibmvfc event struct 5161 * 5162 **/ 5163 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 5164 { 5165 struct ibmvfc_host *vhost = evt->vhost; 5166 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); 5167 5168 ibmvfc_free_event(evt); 5169 5170 switch (mad_status) { 5171 case IBMVFC_MAD_SUCCESS: 5172 if (list_empty(&vhost->crq.sent) && 5173 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 5174 ibmvfc_init_host(vhost); 5175 return; 5176 } 5177 break; 5178 case IBMVFC_MAD_FAILED: 5179 case IBMVFC_MAD_NOT_SUPPORTED: 5180 case IBMVFC_MAD_CRQ_ERROR: 5181 case IBMVFC_MAD_DRIVER_FAILED: 5182 default: 5183 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 5184 break; 5185 } 5186 5187 ibmvfc_hard_reset_host(vhost); 5188 } 5189 5190 /** 5191 * ibmvfc_npiv_logout - Issue an NPIV Logout 5192 * @vhost: ibmvfc host struct 5193 * 5194 **/ 5195 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 5196 { 5197 struct ibmvfc_npiv_logout_mad *mad; 5198 struct ibmvfc_event *evt; 5199 5200 evt = ibmvfc_get_event(&vhost->crq); 5201 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 5202 5203 mad = &evt->iu.npiv_logout; 5204 memset(mad, 0, sizeof(*mad)); 5205 mad->common.version = cpu_to_be32(1); 5206 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); 5207 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); 5208 5209 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 5210 5211 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5212 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 5213 else 5214 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5215 } 5216 5217 /** 5218 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 5219 * @vhost: ibmvfc host struct 5220 * 5221 * Returns: 5222 * 1 if work to do / 0 if not 5223 **/ 5224 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 5225 { 5226 struct ibmvfc_target *tgt; 5227 5228 list_for_each_entry(tgt, &vhost->targets, queue) { 5229 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 5230 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 5231 return 1; 5232 } 5233 5234 return 0; 5235 } 5236 5237 /** 5238 * ibmvfc_dev_logo_to_do - Is there target logout work to do? 5239 * @vhost: ibmvfc host struct 5240 * 5241 * Returns: 5242 * 1 if work to do / 0 if not 5243 **/ 5244 static int ibmvfc_dev_logo_to_do(struct ibmvfc_host *vhost) 5245 { 5246 struct ibmvfc_target *tgt; 5247 5248 list_for_each_entry(tgt, &vhost->targets, queue) { 5249 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT || 5250 tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) 5251 return 1; 5252 } 5253 return 0; 5254 } 5255 5256 /** 5257 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 5258 * @vhost: ibmvfc host struct 5259 * 5260 * Returns: 5261 * 1 if work to do / 0 if not 5262 **/ 5263 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 5264 { 5265 struct ibmvfc_target *tgt; 5266 5267 if (kthread_should_stop()) 5268 return 1; 5269 switch (vhost->action) { 5270 case IBMVFC_HOST_ACTION_NONE: 5271 case IBMVFC_HOST_ACTION_INIT_WAIT: 5272 case IBMVFC_HOST_ACTION_LOGO_WAIT: 5273 return 0; 5274 case IBMVFC_HOST_ACTION_TGT_INIT: 5275 case IBMVFC_HOST_ACTION_QUERY_TGTS: 5276 if (vhost->discovery_threads == disc_threads) 5277 return 0; 5278 list_for_each_entry(tgt, &vhost->targets, queue) 5279 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 5280 return 1; 5281 list_for_each_entry(tgt, &vhost->targets, queue) 5282 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 5283 return 0; 5284 return 1; 5285 case IBMVFC_HOST_ACTION_TGT_DEL: 5286 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 5287 if (vhost->discovery_threads == disc_threads) 5288 return 0; 5289 list_for_each_entry(tgt, &vhost->targets, queue) 5290 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) 5291 return 1; 5292 list_for_each_entry(tgt, &vhost->targets, queue) 5293 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) 5294 return 0; 5295 return 1; 5296 case IBMVFC_HOST_ACTION_LOGO: 5297 case IBMVFC_HOST_ACTION_INIT: 5298 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 5299 case IBMVFC_HOST_ACTION_QUERY: 5300 case IBMVFC_HOST_ACTION_RESET: 5301 case IBMVFC_HOST_ACTION_REENABLE: 5302 default: 5303 break; 5304 } 5305 5306 return 1; 5307 } 5308 5309 /** 5310 * ibmvfc_work_to_do - Is there task level work to do? 5311 * @vhost: ibmvfc host struct 5312 * 5313 * Returns: 5314 * 1 if work to do / 0 if not 5315 **/ 5316 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 5317 { 5318 unsigned long flags; 5319 int rc; 5320 5321 spin_lock_irqsave(vhost->host->host_lock, flags); 5322 rc = __ibmvfc_work_to_do(vhost); 5323 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5324 return rc; 5325 } 5326 5327 /** 5328 * ibmvfc_log_ae - Log async events if necessary 5329 * @vhost: ibmvfc host struct 5330 * @events: events to log 5331 * 5332 **/ 5333 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 5334 { 5335 if (events & IBMVFC_AE_RSCN) 5336 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 5337 if ((events & IBMVFC_AE_LINKDOWN) && 5338 vhost->state >= IBMVFC_HALTED) 5339 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 5340 if ((events & IBMVFC_AE_LINKUP) && 5341 vhost->state == IBMVFC_INITIALIZING) 5342 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 5343 } 5344 5345 /** 5346 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 5347 * @tgt: ibmvfc target struct 5348 * 5349 **/ 5350 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 5351 { 5352 struct ibmvfc_host *vhost = tgt->vhost; 5353 struct fc_rport *rport; 5354 unsigned long flags; 5355 5356 tgt_dbg(tgt, "Adding rport\n"); 5357 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 5358 spin_lock_irqsave(vhost->host->host_lock, flags); 5359 5360 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 5361 tgt_dbg(tgt, "Deleting rport\n"); 5362 list_del(&tgt->queue); 5363 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 5364 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5365 fc_remote_port_delete(rport); 5366 del_timer_sync(&tgt->timer); 5367 kref_put(&tgt->kref, ibmvfc_release_tgt); 5368 return; 5369 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 5370 tgt_dbg(tgt, "Deleting rport with outstanding I/O\n"); 5371 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); 5372 tgt->rport = NULL; 5373 tgt->init_retries = 0; 5374 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5375 fc_remote_port_delete(rport); 5376 return; 5377 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 5378 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5379 return; 5380 } 5381 5382 if (rport) { 5383 tgt_dbg(tgt, "rport add succeeded\n"); 5384 tgt->rport = rport; 5385 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; 5386 rport->supported_classes = 0; 5387 tgt->target_id = rport->scsi_target_id; 5388 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) 5389 rport->supported_classes |= FC_COS_CLASS1; 5390 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) 5391 rport->supported_classes |= FC_COS_CLASS2; 5392 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) 5393 rport->supported_classes |= FC_COS_CLASS3; 5394 if (rport->rqst_q) 5395 blk_queue_max_segments(rport->rqst_q, 1); 5396 } else 5397 tgt_dbg(tgt, "rport add failed\n"); 5398 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5399 } 5400 5401 /** 5402 * ibmvfc_do_work - Do task level work 5403 * @vhost: ibmvfc host struct 5404 * 5405 **/ 5406 static void ibmvfc_do_work(struct ibmvfc_host *vhost) 5407 { 5408 struct ibmvfc_target *tgt; 5409 unsigned long flags; 5410 struct fc_rport *rport; 5411 LIST_HEAD(purge); 5412 int rc; 5413 5414 ibmvfc_log_ae(vhost, vhost->events_to_log); 5415 spin_lock_irqsave(vhost->host->host_lock, flags); 5416 vhost->events_to_log = 0; 5417 switch (vhost->action) { 5418 case IBMVFC_HOST_ACTION_NONE: 5419 case IBMVFC_HOST_ACTION_LOGO_WAIT: 5420 case IBMVFC_HOST_ACTION_INIT_WAIT: 5421 break; 5422 case IBMVFC_HOST_ACTION_RESET: 5423 list_splice_init(&vhost->purge, &purge); 5424 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5425 ibmvfc_complete_purge(&purge); 5426 rc = ibmvfc_reset_crq(vhost); 5427 5428 spin_lock_irqsave(vhost->host->host_lock, flags); 5429 if (!rc || rc == H_CLOSED) 5430 vio_enable_interrupts(to_vio_dev(vhost->dev)); 5431 if (vhost->action == IBMVFC_HOST_ACTION_RESET) { 5432 /* 5433 * The only action we could have changed to would have 5434 * been reenable, in which case, we skip the rest of 5435 * this path and wait until we've done the re-enable 5436 * before sending the crq init. 5437 */ 5438 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 5439 5440 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 5441 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 5442 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5443 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 5444 } 5445 } 5446 break; 5447 case IBMVFC_HOST_ACTION_REENABLE: 5448 list_splice_init(&vhost->purge, &purge); 5449 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5450 ibmvfc_complete_purge(&purge); 5451 rc = ibmvfc_reenable_crq_queue(vhost); 5452 5453 spin_lock_irqsave(vhost->host->host_lock, flags); 5454 if (vhost->action == IBMVFC_HOST_ACTION_REENABLE) { 5455 /* 5456 * The only action we could have changed to would have 5457 * been reset, in which case, we skip the rest of this 5458 * path and wait until we've done the reset before 5459 * sending the crq init. 5460 */ 5461 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 5462 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 5463 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5464 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 5465 } 5466 } 5467 break; 5468 case IBMVFC_HOST_ACTION_LOGO: 5469 vhost->job_step(vhost); 5470 break; 5471 case IBMVFC_HOST_ACTION_INIT: 5472 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 5473 if (vhost->delay_init) { 5474 vhost->delay_init = 0; 5475 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5476 ssleep(15); 5477 return; 5478 } else 5479 vhost->job_step(vhost); 5480 break; 5481 case IBMVFC_HOST_ACTION_QUERY: 5482 list_for_each_entry(tgt, &vhost->targets, queue) 5483 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 5484 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 5485 break; 5486 case IBMVFC_HOST_ACTION_QUERY_TGTS: 5487 list_for_each_entry(tgt, &vhost->targets, queue) { 5488 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 5489 tgt->job_step(tgt); 5490 break; 5491 } 5492 } 5493 5494 if (!ibmvfc_dev_init_to_do(vhost)) 5495 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 5496 break; 5497 case IBMVFC_HOST_ACTION_TGT_DEL: 5498 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 5499 list_for_each_entry(tgt, &vhost->targets, queue) { 5500 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { 5501 tgt->job_step(tgt); 5502 break; 5503 } 5504 } 5505 5506 if (ibmvfc_dev_logo_to_do(vhost)) { 5507 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5508 return; 5509 } 5510 5511 list_for_each_entry(tgt, &vhost->targets, queue) { 5512 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 5513 tgt_dbg(tgt, "Deleting rport\n"); 5514 rport = tgt->rport; 5515 tgt->rport = NULL; 5516 list_del(&tgt->queue); 5517 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 5518 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5519 if (rport) 5520 fc_remote_port_delete(rport); 5521 del_timer_sync(&tgt->timer); 5522 kref_put(&tgt->kref, ibmvfc_release_tgt); 5523 return; 5524 } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 5525 tgt_dbg(tgt, "Deleting rport with I/O outstanding\n"); 5526 rport = tgt->rport; 5527 tgt->rport = NULL; 5528 tgt->init_retries = 0; 5529 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); 5530 5531 /* 5532 * If fast fail is enabled, we wait for it to fire and then clean up 5533 * the old port, since we expect the fast fail timer to clean up the 5534 * outstanding I/O faster than waiting for normal command timeouts. 5535 * However, if fast fail is disabled, any I/O outstanding to the 5536 * rport LUNs will stay outstanding indefinitely, since the EH handlers 5537 * won't get invoked for I/O's timing out. If this is a NPIV failover 5538 * scenario, the better alternative is to use the move login. 5539 */ 5540 if (rport && rport->fast_io_fail_tmo == -1) 5541 tgt->move_login = 1; 5542 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5543 if (rport) 5544 fc_remote_port_delete(rport); 5545 return; 5546 } 5547 } 5548 5549 if (vhost->state == IBMVFC_INITIALIZING) { 5550 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 5551 if (vhost->reinit) { 5552 vhost->reinit = 0; 5553 scsi_block_requests(vhost->host); 5554 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 5555 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5556 } else { 5557 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 5558 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 5559 wake_up(&vhost->init_wait_q); 5560 schedule_work(&vhost->rport_add_work_q); 5561 vhost->init_retries = 0; 5562 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5563 scsi_unblock_requests(vhost->host); 5564 } 5565 5566 return; 5567 } else { 5568 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 5569 vhost->job_step = ibmvfc_discover_targets; 5570 } 5571 } else { 5572 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 5573 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5574 scsi_unblock_requests(vhost->host); 5575 wake_up(&vhost->init_wait_q); 5576 return; 5577 } 5578 break; 5579 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 5580 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 5581 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5582 ibmvfc_alloc_targets(vhost); 5583 spin_lock_irqsave(vhost->host->host_lock, flags); 5584 break; 5585 case IBMVFC_HOST_ACTION_TGT_INIT: 5586 list_for_each_entry(tgt, &vhost->targets, queue) { 5587 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 5588 tgt->job_step(tgt); 5589 break; 5590 } 5591 } 5592 5593 if (!ibmvfc_dev_init_to_do(vhost)) 5594 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 5595 break; 5596 default: 5597 break; 5598 } 5599 5600 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5601 } 5602 5603 /** 5604 * ibmvfc_work - Do task level work 5605 * @data: ibmvfc host struct 5606 * 5607 * Returns: 5608 * zero 5609 **/ 5610 static int ibmvfc_work(void *data) 5611 { 5612 struct ibmvfc_host *vhost = data; 5613 int rc; 5614 5615 set_user_nice(current, MIN_NICE); 5616 5617 while (1) { 5618 rc = wait_event_interruptible(vhost->work_wait_q, 5619 ibmvfc_work_to_do(vhost)); 5620 5621 BUG_ON(rc); 5622 5623 if (kthread_should_stop()) 5624 break; 5625 5626 ibmvfc_do_work(vhost); 5627 } 5628 5629 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 5630 return 0; 5631 } 5632 5633 /** 5634 * ibmvfc_alloc_queue - Allocate queue 5635 * @vhost: ibmvfc host struct 5636 * @queue: ibmvfc queue to allocate 5637 * @fmt: queue format to allocate 5638 * 5639 * Returns: 5640 * 0 on success / non-zero on failure 5641 **/ 5642 static int ibmvfc_alloc_queue(struct ibmvfc_host *vhost, 5643 struct ibmvfc_queue *queue, 5644 enum ibmvfc_msg_fmt fmt) 5645 { 5646 struct device *dev = vhost->dev; 5647 size_t fmt_size; 5648 unsigned int pool_size = 0; 5649 5650 ENTER; 5651 spin_lock_init(&queue->_lock); 5652 queue->q_lock = &queue->_lock; 5653 5654 switch (fmt) { 5655 case IBMVFC_CRQ_FMT: 5656 fmt_size = sizeof(*queue->msgs.crq); 5657 pool_size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 5658 break; 5659 case IBMVFC_ASYNC_FMT: 5660 fmt_size = sizeof(*queue->msgs.async); 5661 break; 5662 case IBMVFC_SUB_CRQ_FMT: 5663 fmt_size = sizeof(*queue->msgs.scrq); 5664 /* We need one extra event for Cancel Commands */ 5665 pool_size = max_requests + 1; 5666 break; 5667 default: 5668 dev_warn(dev, "Unknown command/response queue message format: %d\n", fmt); 5669 return -EINVAL; 5670 } 5671 5672 if (ibmvfc_init_event_pool(vhost, queue, pool_size)) { 5673 dev_err(dev, "Couldn't initialize event pool.\n"); 5674 return -ENOMEM; 5675 } 5676 5677 queue->msgs.handle = (void *)get_zeroed_page(GFP_KERNEL); 5678 if (!queue->msgs.handle) 5679 return -ENOMEM; 5680 5681 queue->msg_token = dma_map_single(dev, queue->msgs.handle, PAGE_SIZE, 5682 DMA_BIDIRECTIONAL); 5683 5684 if (dma_mapping_error(dev, queue->msg_token)) { 5685 free_page((unsigned long)queue->msgs.handle); 5686 queue->msgs.handle = NULL; 5687 return -ENOMEM; 5688 } 5689 5690 queue->cur = 0; 5691 queue->fmt = fmt; 5692 queue->size = PAGE_SIZE / fmt_size; 5693 5694 queue->vhost = vhost; 5695 return 0; 5696 } 5697 5698 /** 5699 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 5700 * @vhost: ibmvfc host struct 5701 * 5702 * Allocates a page for messages, maps it for dma, and registers 5703 * the crq with the hypervisor. 5704 * 5705 * Return value: 5706 * zero on success / other on failure 5707 **/ 5708 static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 5709 { 5710 int rc, retrc = -ENOMEM; 5711 struct device *dev = vhost->dev; 5712 struct vio_dev *vdev = to_vio_dev(dev); 5713 struct ibmvfc_queue *crq = &vhost->crq; 5714 5715 ENTER; 5716 if (ibmvfc_alloc_queue(vhost, crq, IBMVFC_CRQ_FMT)) 5717 return -ENOMEM; 5718 5719 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5720 crq->msg_token, PAGE_SIZE); 5721 5722 if (rc == H_RESOURCE) 5723 /* maybe kexecing and resource is busy. try a reset */ 5724 retrc = rc = ibmvfc_reset_crq(vhost); 5725 5726 if (rc == H_CLOSED) 5727 dev_warn(dev, "Partner adapter not ready\n"); 5728 else if (rc) { 5729 dev_warn(dev, "Error %d opening adapter\n", rc); 5730 goto reg_crq_failed; 5731 } 5732 5733 retrc = 0; 5734 5735 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 5736 5737 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 5738 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 5739 goto req_irq_failed; 5740 } 5741 5742 if ((rc = vio_enable_interrupts(vdev))) { 5743 dev_err(dev, "Error %d enabling interrupts\n", rc); 5744 goto req_irq_failed; 5745 } 5746 5747 LEAVE; 5748 return retrc; 5749 5750 req_irq_failed: 5751 tasklet_kill(&vhost->tasklet); 5752 do { 5753 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5754 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5755 reg_crq_failed: 5756 ibmvfc_free_queue(vhost, crq); 5757 return retrc; 5758 } 5759 5760 static int ibmvfc_register_scsi_channel(struct ibmvfc_host *vhost, 5761 int index) 5762 { 5763 struct device *dev = vhost->dev; 5764 struct vio_dev *vdev = to_vio_dev(dev); 5765 struct ibmvfc_queue *scrq = &vhost->scsi_scrqs.scrqs[index]; 5766 int rc = -ENOMEM; 5767 5768 ENTER; 5769 5770 rc = h_reg_sub_crq(vdev->unit_address, scrq->msg_token, PAGE_SIZE, 5771 &scrq->cookie, &scrq->hw_irq); 5772 5773 /* H_CLOSED indicates successful register, but no CRQ partner */ 5774 if (rc && rc != H_CLOSED) { 5775 dev_warn(dev, "Error registering sub-crq: %d\n", rc); 5776 if (rc == H_PARAMETER) 5777 dev_warn_once(dev, "Firmware may not support MQ\n"); 5778 goto reg_failed; 5779 } 5780 5781 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 5782 5783 if (!scrq->irq) { 5784 rc = -EINVAL; 5785 dev_err(dev, "Error mapping sub-crq[%d] irq\n", index); 5786 goto irq_failed; 5787 } 5788 5789 snprintf(scrq->name, sizeof(scrq->name), "ibmvfc-%x-scsi%d", 5790 vdev->unit_address, index); 5791 rc = request_irq(scrq->irq, ibmvfc_interrupt_scsi, 0, scrq->name, scrq); 5792 5793 if (rc) { 5794 dev_err(dev, "Couldn't register sub-crq[%d] irq\n", index); 5795 irq_dispose_mapping(scrq->irq); 5796 goto irq_failed; 5797 } 5798 5799 scrq->hwq_id = index; 5800 5801 LEAVE; 5802 return 0; 5803 5804 irq_failed: 5805 do { 5806 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, scrq->cookie); 5807 } while (rtas_busy_delay(rc)); 5808 reg_failed: 5809 LEAVE; 5810 return rc; 5811 } 5812 5813 static void ibmvfc_deregister_scsi_channel(struct ibmvfc_host *vhost, int index) 5814 { 5815 struct device *dev = vhost->dev; 5816 struct vio_dev *vdev = to_vio_dev(dev); 5817 struct ibmvfc_queue *scrq = &vhost->scsi_scrqs.scrqs[index]; 5818 long rc; 5819 5820 ENTER; 5821 5822 free_irq(scrq->irq, scrq); 5823 irq_dispose_mapping(scrq->irq); 5824 scrq->irq = 0; 5825 5826 do { 5827 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, 5828 scrq->cookie); 5829 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5830 5831 if (rc) 5832 dev_err(dev, "Failed to free sub-crq[%d]: rc=%ld\n", index, rc); 5833 5834 /* Clean out the queue */ 5835 memset(scrq->msgs.crq, 0, PAGE_SIZE); 5836 scrq->cur = 0; 5837 5838 LEAVE; 5839 } 5840 5841 static void ibmvfc_reg_sub_crqs(struct ibmvfc_host *vhost) 5842 { 5843 int i, j; 5844 5845 ENTER; 5846 if (!vhost->mq_enabled || !vhost->scsi_scrqs.scrqs) 5847 return; 5848 5849 for (i = 0; i < nr_scsi_hw_queues; i++) { 5850 if (ibmvfc_register_scsi_channel(vhost, i)) { 5851 for (j = i; j > 0; j--) 5852 ibmvfc_deregister_scsi_channel(vhost, j - 1); 5853 vhost->do_enquiry = 0; 5854 return; 5855 } 5856 } 5857 5858 LEAVE; 5859 } 5860 5861 static void ibmvfc_dereg_sub_crqs(struct ibmvfc_host *vhost) 5862 { 5863 int i; 5864 5865 ENTER; 5866 if (!vhost->mq_enabled || !vhost->scsi_scrqs.scrqs) 5867 return; 5868 5869 for (i = 0; i < nr_scsi_hw_queues; i++) 5870 ibmvfc_deregister_scsi_channel(vhost, i); 5871 5872 LEAVE; 5873 } 5874 5875 static void ibmvfc_init_sub_crqs(struct ibmvfc_host *vhost) 5876 { 5877 struct ibmvfc_queue *scrq; 5878 int i, j; 5879 5880 ENTER; 5881 if (!vhost->mq_enabled) 5882 return; 5883 5884 vhost->scsi_scrqs.scrqs = kcalloc(nr_scsi_hw_queues, 5885 sizeof(*vhost->scsi_scrqs.scrqs), 5886 GFP_KERNEL); 5887 if (!vhost->scsi_scrqs.scrqs) { 5888 vhost->do_enquiry = 0; 5889 return; 5890 } 5891 5892 for (i = 0; i < nr_scsi_hw_queues; i++) { 5893 scrq = &vhost->scsi_scrqs.scrqs[i]; 5894 if (ibmvfc_alloc_queue(vhost, scrq, IBMVFC_SUB_CRQ_FMT)) { 5895 for (j = i; j > 0; j--) { 5896 scrq = &vhost->scsi_scrqs.scrqs[j - 1]; 5897 ibmvfc_free_queue(vhost, scrq); 5898 } 5899 kfree(vhost->scsi_scrqs.scrqs); 5900 vhost->scsi_scrqs.scrqs = NULL; 5901 vhost->scsi_scrqs.active_queues = 0; 5902 vhost->do_enquiry = 0; 5903 vhost->mq_enabled = 0; 5904 return; 5905 } 5906 } 5907 5908 ibmvfc_reg_sub_crqs(vhost); 5909 5910 LEAVE; 5911 } 5912 5913 static void ibmvfc_release_sub_crqs(struct ibmvfc_host *vhost) 5914 { 5915 struct ibmvfc_queue *scrq; 5916 int i; 5917 5918 ENTER; 5919 if (!vhost->scsi_scrqs.scrqs) 5920 return; 5921 5922 ibmvfc_dereg_sub_crqs(vhost); 5923 5924 for (i = 0; i < nr_scsi_hw_queues; i++) { 5925 scrq = &vhost->scsi_scrqs.scrqs[i]; 5926 ibmvfc_free_queue(vhost, scrq); 5927 } 5928 5929 kfree(vhost->scsi_scrqs.scrqs); 5930 vhost->scsi_scrqs.scrqs = NULL; 5931 vhost->scsi_scrqs.active_queues = 0; 5932 LEAVE; 5933 } 5934 5935 /** 5936 * ibmvfc_free_mem - Free memory for vhost 5937 * @vhost: ibmvfc host struct 5938 * 5939 * Return value: 5940 * none 5941 **/ 5942 static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 5943 { 5944 struct ibmvfc_queue *async_q = &vhost->async_crq; 5945 5946 ENTER; 5947 mempool_destroy(vhost->tgt_pool); 5948 kfree(vhost->trace); 5949 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 5950 vhost->disc_buf_dma); 5951 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 5952 vhost->login_buf, vhost->login_buf_dma); 5953 dma_free_coherent(vhost->dev, sizeof(*vhost->channel_setup_buf), 5954 vhost->channel_setup_buf, vhost->channel_setup_dma); 5955 dma_pool_destroy(vhost->sg_pool); 5956 ibmvfc_free_queue(vhost, async_q); 5957 LEAVE; 5958 } 5959 5960 /** 5961 * ibmvfc_alloc_mem - Allocate memory for vhost 5962 * @vhost: ibmvfc host struct 5963 * 5964 * Return value: 5965 * 0 on success / non-zero on failure 5966 **/ 5967 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 5968 { 5969 struct ibmvfc_queue *async_q = &vhost->async_crq; 5970 struct device *dev = vhost->dev; 5971 5972 ENTER; 5973 if (ibmvfc_alloc_queue(vhost, async_q, IBMVFC_ASYNC_FMT)) { 5974 dev_err(dev, "Couldn't allocate/map async queue.\n"); 5975 goto nomem; 5976 } 5977 5978 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 5979 SG_ALL * sizeof(struct srp_direct_buf), 5980 sizeof(struct srp_direct_buf), 0); 5981 5982 if (!vhost->sg_pool) { 5983 dev_err(dev, "Failed to allocate sg pool\n"); 5984 goto unmap_async_crq; 5985 } 5986 5987 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 5988 &vhost->login_buf_dma, GFP_KERNEL); 5989 5990 if (!vhost->login_buf) { 5991 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 5992 goto free_sg_pool; 5993 } 5994 5995 vhost->disc_buf_sz = sizeof(*vhost->disc_buf) * max_targets; 5996 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 5997 &vhost->disc_buf_dma, GFP_KERNEL); 5998 5999 if (!vhost->disc_buf) { 6000 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 6001 goto free_login_buffer; 6002 } 6003 6004 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 6005 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 6006 atomic_set(&vhost->trace_index, -1); 6007 6008 if (!vhost->trace) 6009 goto free_disc_buffer; 6010 6011 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 6012 sizeof(struct ibmvfc_target)); 6013 6014 if (!vhost->tgt_pool) { 6015 dev_err(dev, "Couldn't allocate target memory pool\n"); 6016 goto free_trace; 6017 } 6018 6019 vhost->channel_setup_buf = dma_alloc_coherent(dev, sizeof(*vhost->channel_setup_buf), 6020 &vhost->channel_setup_dma, 6021 GFP_KERNEL); 6022 6023 if (!vhost->channel_setup_buf) { 6024 dev_err(dev, "Couldn't allocate Channel Setup buffer\n"); 6025 goto free_tgt_pool; 6026 } 6027 6028 LEAVE; 6029 return 0; 6030 6031 free_tgt_pool: 6032 mempool_destroy(vhost->tgt_pool); 6033 free_trace: 6034 kfree(vhost->trace); 6035 free_disc_buffer: 6036 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 6037 vhost->disc_buf_dma); 6038 free_login_buffer: 6039 dma_free_coherent(dev, sizeof(*vhost->login_buf), 6040 vhost->login_buf, vhost->login_buf_dma); 6041 free_sg_pool: 6042 dma_pool_destroy(vhost->sg_pool); 6043 unmap_async_crq: 6044 ibmvfc_free_queue(vhost, async_q); 6045 nomem: 6046 LEAVE; 6047 return -ENOMEM; 6048 } 6049 6050 /** 6051 * ibmvfc_rport_add_thread - Worker thread for rport adds 6052 * @work: work struct 6053 * 6054 **/ 6055 static void ibmvfc_rport_add_thread(struct work_struct *work) 6056 { 6057 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 6058 rport_add_work_q); 6059 struct ibmvfc_target *tgt; 6060 struct fc_rport *rport; 6061 unsigned long flags; 6062 int did_work; 6063 6064 ENTER; 6065 spin_lock_irqsave(vhost->host->host_lock, flags); 6066 do { 6067 did_work = 0; 6068 if (vhost->state != IBMVFC_ACTIVE) 6069 break; 6070 6071 list_for_each_entry(tgt, &vhost->targets, queue) { 6072 if (tgt->add_rport) { 6073 did_work = 1; 6074 tgt->add_rport = 0; 6075 kref_get(&tgt->kref); 6076 rport = tgt->rport; 6077 if (!rport) { 6078 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6079 ibmvfc_tgt_add_rport(tgt); 6080 } else if (get_device(&rport->dev)) { 6081 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6082 tgt_dbg(tgt, "Setting rport roles\n"); 6083 fc_remote_port_rolechg(rport, tgt->ids.roles); 6084 put_device(&rport->dev); 6085 } else { 6086 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6087 } 6088 6089 kref_put(&tgt->kref, ibmvfc_release_tgt); 6090 spin_lock_irqsave(vhost->host->host_lock, flags); 6091 break; 6092 } 6093 } 6094 } while(did_work); 6095 6096 if (vhost->state == IBMVFC_ACTIVE) 6097 vhost->scan_complete = 1; 6098 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6099 LEAVE; 6100 } 6101 6102 /** 6103 * ibmvfc_probe - Adapter hot plug add entry point 6104 * @vdev: vio device struct 6105 * @id: vio device id struct 6106 * 6107 * Return value: 6108 * 0 on success / non-zero on failure 6109 **/ 6110 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 6111 { 6112 struct ibmvfc_host *vhost; 6113 struct Scsi_Host *shost; 6114 struct device *dev = &vdev->dev; 6115 int rc = -ENOMEM; 6116 unsigned int max_scsi_queues = IBMVFC_MAX_SCSI_QUEUES; 6117 6118 ENTER; 6119 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 6120 if (!shost) { 6121 dev_err(dev, "Couldn't allocate host data\n"); 6122 goto out; 6123 } 6124 6125 shost->transportt = ibmvfc_transport_template; 6126 shost->can_queue = max_requests; 6127 shost->max_lun = max_lun; 6128 shost->max_id = max_targets; 6129 shost->max_sectors = IBMVFC_MAX_SECTORS; 6130 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 6131 shost->unique_id = shost->host_no; 6132 shost->nr_hw_queues = mq_enabled ? min(max_scsi_queues, nr_scsi_hw_queues) : 1; 6133 6134 vhost = shost_priv(shost); 6135 INIT_LIST_HEAD(&vhost->targets); 6136 INIT_LIST_HEAD(&vhost->purge); 6137 sprintf(vhost->name, IBMVFC_NAME); 6138 vhost->host = shost; 6139 vhost->dev = dev; 6140 vhost->partition_number = -1; 6141 vhost->log_level = log_level; 6142 vhost->task_set = 1; 6143 6144 vhost->mq_enabled = mq_enabled; 6145 vhost->client_scsi_channels = min(shost->nr_hw_queues, nr_scsi_channels); 6146 vhost->using_channels = 0; 6147 vhost->do_enquiry = 1; 6148 vhost->scan_timeout = 0; 6149 6150 strcpy(vhost->partition_name, "UNKNOWN"); 6151 init_waitqueue_head(&vhost->work_wait_q); 6152 init_waitqueue_head(&vhost->init_wait_q); 6153 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 6154 mutex_init(&vhost->passthru_mutex); 6155 6156 if ((rc = ibmvfc_alloc_mem(vhost))) 6157 goto free_scsi_host; 6158 6159 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 6160 shost->host_no); 6161 6162 if (IS_ERR(vhost->work_thread)) { 6163 dev_err(dev, "Couldn't create kernel thread: %ld\n", 6164 PTR_ERR(vhost->work_thread)); 6165 rc = PTR_ERR(vhost->work_thread); 6166 goto free_host_mem; 6167 } 6168 6169 if ((rc = ibmvfc_init_crq(vhost))) { 6170 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 6171 goto kill_kthread; 6172 } 6173 6174 if ((rc = scsi_add_host(shost, dev))) 6175 goto release_crq; 6176 6177 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 6178 6179 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 6180 &ibmvfc_trace_attr))) { 6181 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 6182 goto remove_shost; 6183 } 6184 6185 ibmvfc_init_sub_crqs(vhost); 6186 6187 if (shost_to_fc_host(shost)->rqst_q) 6188 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 6189 dev_set_drvdata(dev, vhost); 6190 spin_lock(&ibmvfc_driver_lock); 6191 list_add_tail(&vhost->queue, &ibmvfc_head); 6192 spin_unlock(&ibmvfc_driver_lock); 6193 6194 ibmvfc_send_crq_init(vhost); 6195 scsi_scan_host(shost); 6196 return 0; 6197 6198 remove_shost: 6199 scsi_remove_host(shost); 6200 release_crq: 6201 ibmvfc_release_crq_queue(vhost); 6202 kill_kthread: 6203 kthread_stop(vhost->work_thread); 6204 free_host_mem: 6205 ibmvfc_free_mem(vhost); 6206 free_scsi_host: 6207 scsi_host_put(shost); 6208 out: 6209 LEAVE; 6210 return rc; 6211 } 6212 6213 /** 6214 * ibmvfc_remove - Adapter hot plug remove entry point 6215 * @vdev: vio device struct 6216 * 6217 * Return value: 6218 * 0 6219 **/ 6220 static void ibmvfc_remove(struct vio_dev *vdev) 6221 { 6222 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 6223 LIST_HEAD(purge); 6224 unsigned long flags; 6225 6226 ENTER; 6227 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 6228 6229 spin_lock_irqsave(vhost->host->host_lock, flags); 6230 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 6231 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6232 6233 ibmvfc_wait_while_resetting(vhost); 6234 kthread_stop(vhost->work_thread); 6235 fc_remove_host(vhost->host); 6236 scsi_remove_host(vhost->host); 6237 6238 spin_lock_irqsave(vhost->host->host_lock, flags); 6239 ibmvfc_purge_requests(vhost, DID_ERROR); 6240 list_splice_init(&vhost->purge, &purge); 6241 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6242 ibmvfc_complete_purge(&purge); 6243 ibmvfc_release_sub_crqs(vhost); 6244 ibmvfc_release_crq_queue(vhost); 6245 6246 ibmvfc_free_mem(vhost); 6247 spin_lock(&ibmvfc_driver_lock); 6248 list_del(&vhost->queue); 6249 spin_unlock(&ibmvfc_driver_lock); 6250 scsi_host_put(vhost->host); 6251 LEAVE; 6252 } 6253 6254 /** 6255 * ibmvfc_resume - Resume from suspend 6256 * @dev: device struct 6257 * 6258 * We may have lost an interrupt across suspend/resume, so kick the 6259 * interrupt handler 6260 * 6261 */ 6262 static int ibmvfc_resume(struct device *dev) 6263 { 6264 unsigned long flags; 6265 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 6266 struct vio_dev *vdev = to_vio_dev(dev); 6267 6268 spin_lock_irqsave(vhost->host->host_lock, flags); 6269 vio_disable_interrupts(vdev); 6270 tasklet_schedule(&vhost->tasklet); 6271 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6272 return 0; 6273 } 6274 6275 /** 6276 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 6277 * @vdev: vio device struct 6278 * 6279 * Return value: 6280 * Number of bytes the driver will need to DMA map at the same time in 6281 * order to perform well. 6282 */ 6283 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 6284 { 6285 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 6286 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 6287 } 6288 6289 static const struct vio_device_id ibmvfc_device_table[] = { 6290 {"fcp", "IBM,vfc-client"}, 6291 { "", "" } 6292 }; 6293 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 6294 6295 static const struct dev_pm_ops ibmvfc_pm_ops = { 6296 .resume = ibmvfc_resume 6297 }; 6298 6299 static struct vio_driver ibmvfc_driver = { 6300 .id_table = ibmvfc_device_table, 6301 .probe = ibmvfc_probe, 6302 .remove = ibmvfc_remove, 6303 .get_desired_dma = ibmvfc_get_desired_dma, 6304 .name = IBMVFC_NAME, 6305 .pm = &ibmvfc_pm_ops, 6306 }; 6307 6308 static struct fc_function_template ibmvfc_transport_functions = { 6309 .show_host_fabric_name = 1, 6310 .show_host_node_name = 1, 6311 .show_host_port_name = 1, 6312 .show_host_supported_classes = 1, 6313 .show_host_port_type = 1, 6314 .show_host_port_id = 1, 6315 .show_host_maxframe_size = 1, 6316 6317 .get_host_port_state = ibmvfc_get_host_port_state, 6318 .show_host_port_state = 1, 6319 6320 .get_host_speed = ibmvfc_get_host_speed, 6321 .show_host_speed = 1, 6322 6323 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 6324 .terminate_rport_io = ibmvfc_terminate_rport_io, 6325 6326 .show_rport_maxframe_size = 1, 6327 .show_rport_supported_classes = 1, 6328 6329 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 6330 .show_rport_dev_loss_tmo = 1, 6331 6332 .get_starget_node_name = ibmvfc_get_starget_node_name, 6333 .show_starget_node_name = 1, 6334 6335 .get_starget_port_name = ibmvfc_get_starget_port_name, 6336 .show_starget_port_name = 1, 6337 6338 .get_starget_port_id = ibmvfc_get_starget_port_id, 6339 .show_starget_port_id = 1, 6340 6341 .bsg_request = ibmvfc_bsg_request, 6342 .bsg_timeout = ibmvfc_bsg_timeout, 6343 }; 6344 6345 /** 6346 * ibmvfc_module_init - Initialize the ibmvfc module 6347 * 6348 * Return value: 6349 * 0 on success / other on failure 6350 **/ 6351 static int __init ibmvfc_module_init(void) 6352 { 6353 int rc; 6354 6355 if (!firmware_has_feature(FW_FEATURE_VIO)) 6356 return -ENODEV; 6357 6358 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 6359 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 6360 6361 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 6362 if (!ibmvfc_transport_template) 6363 return -ENOMEM; 6364 6365 rc = vio_register_driver(&ibmvfc_driver); 6366 if (rc) 6367 fc_release_transport(ibmvfc_transport_template); 6368 return rc; 6369 } 6370 6371 /** 6372 * ibmvfc_module_exit - Teardown the ibmvfc module 6373 * 6374 * Return value: 6375 * nothing 6376 **/ 6377 static void __exit ibmvfc_module_exit(void) 6378 { 6379 vio_unregister_driver(&ibmvfc_driver); 6380 fc_release_transport(ibmvfc_transport_template); 6381 } 6382 6383 module_init(ibmvfc_module_init); 6384 module_exit(ibmvfc_module_exit); 6385