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