1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 4 * 5 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 6 * 7 * Copyright (C) IBM Corporation, 2008 8 */ 9 10 #include <linux/module.h> 11 #include <linux/moduleparam.h> 12 #include <linux/dma-mapping.h> 13 #include <linux/dmapool.h> 14 #include <linux/delay.h> 15 #include <linux/interrupt.h> 16 #include <linux/irqdomain.h> 17 #include <linux/kthread.h> 18 #include <linux/slab.h> 19 #include <linux/of.h> 20 #include <linux/pm.h> 21 #include <linux/stringify.h> 22 #include <linux/bsg-lib.h> 23 #include <asm/firmware.h> 24 #include <asm/irq.h> 25 #include <asm/rtas.h> 26 #include <asm/vio.h> 27 #include <scsi/scsi.h> 28 #include <scsi/scsi_cmnd.h> 29 #include <scsi/scsi_host.h> 30 #include <scsi/scsi_device.h> 31 #include <scsi/scsi_tcq.h> 32 #include <scsi/scsi_transport_fc.h> 33 #include <scsi/scsi_bsg_fc.h> 34 #include "ibmvfc.h" 35 36 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 37 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 38 static u64 max_lun = IBMVFC_MAX_LUN; 39 static unsigned int max_targets = IBMVFC_MAX_TARGETS; 40 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 41 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 42 static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 43 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 44 static unsigned int cls3_error = IBMVFC_CLS3_ERROR; 45 static unsigned int mq_enabled = IBMVFC_MQ; 46 static unsigned int nr_scsi_hw_queues = IBMVFC_SCSI_HW_QUEUES; 47 static unsigned int nr_scsi_channels = IBMVFC_SCSI_CHANNELS; 48 static unsigned int mig_channels_only = IBMVFC_MIG_NO_SUB_TO_CRQ; 49 static unsigned int mig_no_less_channels = IBMVFC_MIG_NO_N_TO_M; 50 51 static LIST_HEAD(ibmvfc_head); 52 static DEFINE_SPINLOCK(ibmvfc_driver_lock); 53 static struct scsi_transport_template *ibmvfc_transport_template; 54 55 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 56 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 57 MODULE_LICENSE("GPL"); 58 MODULE_VERSION(IBMVFC_DRIVER_VERSION); 59 60 module_param_named(mq, mq_enabled, uint, S_IRUGO); 61 MODULE_PARM_DESC(mq, "Enable multiqueue support. " 62 "[Default=" __stringify(IBMVFC_MQ) "]"); 63 module_param_named(scsi_host_queues, nr_scsi_hw_queues, uint, S_IRUGO); 64 MODULE_PARM_DESC(scsi_host_queues, "Number of SCSI Host submission queues. " 65 "[Default=" __stringify(IBMVFC_SCSI_HW_QUEUES) "]"); 66 module_param_named(scsi_hw_channels, nr_scsi_channels, uint, S_IRUGO); 67 MODULE_PARM_DESC(scsi_hw_channels, "Number of hw scsi channels to request. " 68 "[Default=" __stringify(IBMVFC_SCSI_CHANNELS) "]"); 69 module_param_named(mig_channels_only, mig_channels_only, uint, S_IRUGO); 70 MODULE_PARM_DESC(mig_channels_only, "Prevent migration to non-channelized system. " 71 "[Default=" __stringify(IBMVFC_MIG_NO_SUB_TO_CRQ) "]"); 72 module_param_named(mig_no_less_channels, mig_no_less_channels, uint, S_IRUGO); 73 MODULE_PARM_DESC(mig_no_less_channels, "Prevent migration to system with less channels. " 74 "[Default=" __stringify(IBMVFC_MIG_NO_N_TO_M) "]"); 75 76 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 77 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 78 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 79 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 80 MODULE_PARM_DESC(default_timeout, 81 "Default timeout in seconds for initialization and EH commands. " 82 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 83 module_param_named(max_requests, max_requests, uint, S_IRUGO); 84 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 85 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 86 module_param_named(max_lun, max_lun, ullong, S_IRUGO); 87 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 88 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 89 module_param_named(max_targets, max_targets, uint, S_IRUGO); 90 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 91 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 92 module_param_named(disc_threads, disc_threads, uint, S_IRUGO); 93 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 94 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 95 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 96 MODULE_PARM_DESC(debug, "Enable driver debug information. " 97 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 98 module_param_named(log_level, log_level, uint, 0); 99 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 100 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 101 module_param_named(cls3_error, cls3_error, uint, 0); 102 MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. " 103 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]"); 104 105 static const struct { 106 u16 status; 107 u16 error; 108 u8 result; 109 u8 retry; 110 int log; 111 char *name; 112 } cmd_status [] = { 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 115 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 116 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 117 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 118 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 119 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 120 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 121 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 122 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 123 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 124 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 125 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 126 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 127 128 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 129 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 130 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 131 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 132 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 133 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 134 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 135 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 136 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 137 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 138 139 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 140 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 141 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 142 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 143 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 144 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 145 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 146 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 147 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 148 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 149 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 150 151 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 152 { IBMVFC_FC_SCSI_ERROR, IBMVFC_COMMAND_FAILED, DID_ERROR, 0, 1, "PRLI to device failed." }, 153 }; 154 155 static void ibmvfc_npiv_login(struct ibmvfc_host *); 156 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 157 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 158 static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 159 static void ibmvfc_npiv_logout(struct ibmvfc_host *); 160 static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *); 161 static void ibmvfc_tgt_move_login(struct ibmvfc_target *); 162 163 static void ibmvfc_release_sub_crqs(struct ibmvfc_host *); 164 static void ibmvfc_init_sub_crqs(struct ibmvfc_host *); 165 166 static const char *unknown_error = "unknown error"; 167 168 static long h_reg_sub_crq(unsigned long unit_address, unsigned long ioba, 169 unsigned long length, unsigned long *cookie, 170 unsigned long *irq) 171 { 172 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 173 long rc; 174 175 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, ioba, length); 176 *cookie = retbuf[0]; 177 *irq = retbuf[1]; 178 179 return rc; 180 } 181 182 static int ibmvfc_check_caps(struct ibmvfc_host *vhost, unsigned long cap_flags) 183 { 184 u64 host_caps = be64_to_cpu(vhost->login_buf->resp.capabilities); 185 186 return (host_caps & cap_flags) ? 1 : 0; 187 } 188 189 static struct ibmvfc_fcp_cmd_iu *ibmvfc_get_fcp_iu(struct ibmvfc_host *vhost, 190 struct ibmvfc_cmd *vfc_cmd) 191 { 192 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 193 return &vfc_cmd->v2.iu; 194 else 195 return &vfc_cmd->v1.iu; 196 } 197 198 static struct ibmvfc_fcp_rsp *ibmvfc_get_fcp_rsp(struct ibmvfc_host *vhost, 199 struct ibmvfc_cmd *vfc_cmd) 200 { 201 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 202 return &vfc_cmd->v2.rsp; 203 else 204 return &vfc_cmd->v1.rsp; 205 } 206 207 #ifdef CONFIG_SCSI_IBMVFC_TRACE 208 /** 209 * ibmvfc_trc_start - Log a start trace entry 210 * @evt: ibmvfc event struct 211 * 212 **/ 213 static void ibmvfc_trc_start(struct ibmvfc_event *evt) 214 { 215 struct ibmvfc_host *vhost = evt->vhost; 216 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 217 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 218 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 219 struct ibmvfc_trace_entry *entry; 220 int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK; 221 222 entry = &vhost->trace[index]; 223 entry->evt = evt; 224 entry->time = jiffies; 225 entry->fmt = evt->crq.format; 226 entry->type = IBMVFC_TRC_START; 227 228 switch (entry->fmt) { 229 case IBMVFC_CMD_FORMAT: 230 entry->op_code = iu->cdb[0]; 231 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 232 entry->lun = scsilun_to_int(&iu->lun); 233 entry->tmf_flags = iu->tmf_flags; 234 entry->u.start.xfer_len = be32_to_cpu(iu->xfer_len); 235 break; 236 case IBMVFC_MAD_FORMAT: 237 entry->op_code = be32_to_cpu(mad->opcode); 238 break; 239 default: 240 break; 241 } 242 } 243 244 /** 245 * ibmvfc_trc_end - Log an end trace entry 246 * @evt: ibmvfc event struct 247 * 248 **/ 249 static void ibmvfc_trc_end(struct ibmvfc_event *evt) 250 { 251 struct ibmvfc_host *vhost = evt->vhost; 252 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 253 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 254 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 255 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 256 struct ibmvfc_trace_entry *entry; 257 int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK; 258 259 entry = &vhost->trace[index]; 260 entry->evt = evt; 261 entry->time = jiffies; 262 entry->fmt = evt->crq.format; 263 entry->type = IBMVFC_TRC_END; 264 265 switch (entry->fmt) { 266 case IBMVFC_CMD_FORMAT: 267 entry->op_code = iu->cdb[0]; 268 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 269 entry->lun = scsilun_to_int(&iu->lun); 270 entry->tmf_flags = iu->tmf_flags; 271 entry->u.end.status = be16_to_cpu(vfc_cmd->status); 272 entry->u.end.error = be16_to_cpu(vfc_cmd->error); 273 entry->u.end.fcp_rsp_flags = rsp->flags; 274 entry->u.end.rsp_code = rsp->data.info.rsp_code; 275 entry->u.end.scsi_status = rsp->scsi_status; 276 break; 277 case IBMVFC_MAD_FORMAT: 278 entry->op_code = be32_to_cpu(mad->opcode); 279 entry->u.end.status = be16_to_cpu(mad->status); 280 break; 281 default: 282 break; 283 284 } 285 } 286 287 #else 288 #define ibmvfc_trc_start(evt) do { } while (0) 289 #define ibmvfc_trc_end(evt) do { } while (0) 290 #endif 291 292 /** 293 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 294 * @status: status / error class 295 * @error: error 296 * 297 * Return value: 298 * index into cmd_status / -EINVAL on failure 299 **/ 300 static int ibmvfc_get_err_index(u16 status, u16 error) 301 { 302 int i; 303 304 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 305 if ((cmd_status[i].status & status) == cmd_status[i].status && 306 cmd_status[i].error == error) 307 return i; 308 309 return -EINVAL; 310 } 311 312 /** 313 * ibmvfc_get_cmd_error - Find the error description for the fcp response 314 * @status: status / error class 315 * @error: error 316 * 317 * Return value: 318 * error description string 319 **/ 320 static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 321 { 322 int rc = ibmvfc_get_err_index(status, error); 323 if (rc >= 0) 324 return cmd_status[rc].name; 325 return unknown_error; 326 } 327 328 /** 329 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 330 * @vhost: ibmvfc host struct 331 * @vfc_cmd: ibmvfc command struct 332 * 333 * Return value: 334 * SCSI result value to return for completed command 335 **/ 336 static int ibmvfc_get_err_result(struct ibmvfc_host *vhost, struct ibmvfc_cmd *vfc_cmd) 337 { 338 int err; 339 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 340 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 341 342 if ((rsp->flags & FCP_RSP_LEN_VALID) && 343 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 344 rsp->data.info.rsp_code)) 345 return DID_ERROR << 16; 346 347 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 348 if (err >= 0) 349 return rsp->scsi_status | (cmd_status[err].result << 16); 350 return rsp->scsi_status | (DID_ERROR << 16); 351 } 352 353 /** 354 * ibmvfc_retry_cmd - Determine if error status is retryable 355 * @status: status / error class 356 * @error: error 357 * 358 * Return value: 359 * 1 if error should be retried / 0 if it should not 360 **/ 361 static int ibmvfc_retry_cmd(u16 status, u16 error) 362 { 363 int rc = ibmvfc_get_err_index(status, error); 364 365 if (rc >= 0) 366 return cmd_status[rc].retry; 367 return 1; 368 } 369 370 static const char *unknown_fc_explain = "unknown fc explain"; 371 372 static const struct { 373 u16 fc_explain; 374 char *name; 375 } ls_explain [] = { 376 { 0x00, "no additional explanation" }, 377 { 0x01, "service parameter error - options" }, 378 { 0x03, "service parameter error - initiator control" }, 379 { 0x05, "service parameter error - recipient control" }, 380 { 0x07, "service parameter error - received data field size" }, 381 { 0x09, "service parameter error - concurrent seq" }, 382 { 0x0B, "service parameter error - credit" }, 383 { 0x0D, "invalid N_Port/F_Port_Name" }, 384 { 0x0E, "invalid node/Fabric Name" }, 385 { 0x0F, "invalid common service parameters" }, 386 { 0x11, "invalid association header" }, 387 { 0x13, "association header required" }, 388 { 0x15, "invalid originator S_ID" }, 389 { 0x17, "invalid OX_ID-RX-ID combination" }, 390 { 0x19, "command (request) already in progress" }, 391 { 0x1E, "N_Port Login requested" }, 392 { 0x1F, "Invalid N_Port_ID" }, 393 }; 394 395 static const struct { 396 u16 fc_explain; 397 char *name; 398 } gs_explain [] = { 399 { 0x00, "no additional explanation" }, 400 { 0x01, "port identifier not registered" }, 401 { 0x02, "port name not registered" }, 402 { 0x03, "node name not registered" }, 403 { 0x04, "class of service not registered" }, 404 { 0x06, "initial process associator not registered" }, 405 { 0x07, "FC-4 TYPEs not registered" }, 406 { 0x08, "symbolic port name not registered" }, 407 { 0x09, "symbolic node name not registered" }, 408 { 0x0A, "port type not registered" }, 409 { 0xF0, "authorization exception" }, 410 { 0xF1, "authentication exception" }, 411 { 0xF2, "data base full" }, 412 { 0xF3, "data base empty" }, 413 { 0xF4, "processing request" }, 414 { 0xF5, "unable to verify connection" }, 415 { 0xF6, "devices not in a common zone" }, 416 }; 417 418 /** 419 * ibmvfc_get_ls_explain - Return the FC Explain description text 420 * @status: FC Explain status 421 * 422 * Returns: 423 * error string 424 **/ 425 static const char *ibmvfc_get_ls_explain(u16 status) 426 { 427 int i; 428 429 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 430 if (ls_explain[i].fc_explain == status) 431 return ls_explain[i].name; 432 433 return unknown_fc_explain; 434 } 435 436 /** 437 * ibmvfc_get_gs_explain - Return the FC Explain description text 438 * @status: FC Explain status 439 * 440 * Returns: 441 * error string 442 **/ 443 static const char *ibmvfc_get_gs_explain(u16 status) 444 { 445 int i; 446 447 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 448 if (gs_explain[i].fc_explain == status) 449 return gs_explain[i].name; 450 451 return unknown_fc_explain; 452 } 453 454 static const struct { 455 enum ibmvfc_fc_type fc_type; 456 char *name; 457 } fc_type [] = { 458 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 459 { IBMVFC_PORT_REJECT, "port reject" }, 460 { IBMVFC_LS_REJECT, "ELS reject" }, 461 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 462 { IBMVFC_PORT_BUSY, "port busy" }, 463 { IBMVFC_BASIC_REJECT, "basic reject" }, 464 }; 465 466 static const char *unknown_fc_type = "unknown fc type"; 467 468 /** 469 * ibmvfc_get_fc_type - Return the FC Type description text 470 * @status: FC Type error status 471 * 472 * Returns: 473 * error string 474 **/ 475 static const char *ibmvfc_get_fc_type(u16 status) 476 { 477 int i; 478 479 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 480 if (fc_type[i].fc_type == status) 481 return fc_type[i].name; 482 483 return unknown_fc_type; 484 } 485 486 /** 487 * ibmvfc_set_tgt_action - Set the next init action for the target 488 * @tgt: ibmvfc target struct 489 * @action: action to perform 490 * 491 * Returns: 492 * 0 if action changed / non-zero if not changed 493 **/ 494 static int ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 495 enum ibmvfc_target_action action) 496 { 497 int rc = -EINVAL; 498 499 switch (tgt->action) { 500 case IBMVFC_TGT_ACTION_LOGOUT_RPORT: 501 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT || 502 action == IBMVFC_TGT_ACTION_DEL_RPORT) { 503 tgt->action = action; 504 rc = 0; 505 } 506 break; 507 case IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT: 508 if (action == IBMVFC_TGT_ACTION_DEL_RPORT || 509 action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 510 tgt->action = action; 511 rc = 0; 512 } 513 break; 514 case IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT: 515 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { 516 tgt->action = action; 517 rc = 0; 518 } 519 break; 520 case IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT: 521 if (action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 522 tgt->action = action; 523 rc = 0; 524 } 525 break; 526 case IBMVFC_TGT_ACTION_DEL_RPORT: 527 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 528 tgt->action = action; 529 rc = 0; 530 } 531 break; 532 case IBMVFC_TGT_ACTION_DELETED_RPORT: 533 break; 534 default: 535 tgt->action = action; 536 rc = 0; 537 break; 538 } 539 540 if (action >= IBMVFC_TGT_ACTION_LOGOUT_RPORT) 541 tgt->add_rport = 0; 542 543 return rc; 544 } 545 546 /** 547 * ibmvfc_set_host_state - Set the state for the host 548 * @vhost: ibmvfc host struct 549 * @state: state to set host to 550 * 551 * Returns: 552 * 0 if state changed / non-zero if not changed 553 **/ 554 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 555 enum ibmvfc_host_state state) 556 { 557 int rc = 0; 558 559 switch (vhost->state) { 560 case IBMVFC_HOST_OFFLINE: 561 rc = -EINVAL; 562 break; 563 default: 564 vhost->state = state; 565 break; 566 } 567 568 return rc; 569 } 570 571 /** 572 * ibmvfc_set_host_action - Set the next init action for the host 573 * @vhost: ibmvfc host struct 574 * @action: action to perform 575 * 576 **/ 577 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 578 enum ibmvfc_host_action action) 579 { 580 switch (action) { 581 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 582 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 583 vhost->action = action; 584 break; 585 case IBMVFC_HOST_ACTION_LOGO_WAIT: 586 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 587 vhost->action = action; 588 break; 589 case IBMVFC_HOST_ACTION_INIT_WAIT: 590 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 591 vhost->action = action; 592 break; 593 case IBMVFC_HOST_ACTION_QUERY: 594 switch (vhost->action) { 595 case IBMVFC_HOST_ACTION_INIT_WAIT: 596 case IBMVFC_HOST_ACTION_NONE: 597 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 598 vhost->action = action; 599 break; 600 default: 601 break; 602 } 603 break; 604 case IBMVFC_HOST_ACTION_TGT_INIT: 605 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 606 vhost->action = action; 607 break; 608 case IBMVFC_HOST_ACTION_REENABLE: 609 case IBMVFC_HOST_ACTION_RESET: 610 vhost->action = action; 611 break; 612 case IBMVFC_HOST_ACTION_INIT: 613 case IBMVFC_HOST_ACTION_TGT_DEL: 614 case IBMVFC_HOST_ACTION_LOGO: 615 case IBMVFC_HOST_ACTION_QUERY_TGTS: 616 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 617 case IBMVFC_HOST_ACTION_NONE: 618 default: 619 switch (vhost->action) { 620 case IBMVFC_HOST_ACTION_RESET: 621 case IBMVFC_HOST_ACTION_REENABLE: 622 break; 623 default: 624 vhost->action = action; 625 break; 626 } 627 break; 628 } 629 } 630 631 /** 632 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 633 * @vhost: ibmvfc host struct 634 * 635 * Return value: 636 * nothing 637 **/ 638 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 639 { 640 if (vhost->action == IBMVFC_HOST_ACTION_NONE && 641 vhost->state == IBMVFC_ACTIVE) { 642 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 643 scsi_block_requests(vhost->host); 644 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 645 } 646 } else 647 vhost->reinit = 1; 648 649 wake_up(&vhost->work_wait_q); 650 } 651 652 /** 653 * ibmvfc_del_tgt - Schedule cleanup and removal of the target 654 * @tgt: ibmvfc target struct 655 **/ 656 static void ibmvfc_del_tgt(struct ibmvfc_target *tgt) 657 { 658 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT)) { 659 tgt->job_step = ibmvfc_tgt_implicit_logout_and_del; 660 tgt->init_retries = 0; 661 } 662 wake_up(&tgt->vhost->work_wait_q); 663 } 664 665 /** 666 * ibmvfc_link_down - Handle a link down event from the adapter 667 * @vhost: ibmvfc host struct 668 * @state: ibmvfc host state to enter 669 * 670 **/ 671 static void ibmvfc_link_down(struct ibmvfc_host *vhost, 672 enum ibmvfc_host_state state) 673 { 674 struct ibmvfc_target *tgt; 675 676 ENTER; 677 scsi_block_requests(vhost->host); 678 list_for_each_entry(tgt, &vhost->targets, queue) 679 ibmvfc_del_tgt(tgt); 680 ibmvfc_set_host_state(vhost, state); 681 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 682 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 683 wake_up(&vhost->work_wait_q); 684 LEAVE; 685 } 686 687 /** 688 * ibmvfc_init_host - Start host initialization 689 * @vhost: ibmvfc host struct 690 * 691 * Return value: 692 * nothing 693 **/ 694 static void ibmvfc_init_host(struct ibmvfc_host *vhost) 695 { 696 struct ibmvfc_target *tgt; 697 698 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 699 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 700 dev_err(vhost->dev, 701 "Host initialization retries exceeded. Taking adapter offline\n"); 702 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 703 return; 704 } 705 } 706 707 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 708 memset(vhost->async_crq.msgs.async, 0, PAGE_SIZE); 709 vhost->async_crq.cur = 0; 710 711 list_for_each_entry(tgt, &vhost->targets, queue) 712 ibmvfc_del_tgt(tgt); 713 scsi_block_requests(vhost->host); 714 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 715 vhost->job_step = ibmvfc_npiv_login; 716 wake_up(&vhost->work_wait_q); 717 } 718 } 719 720 /** 721 * ibmvfc_send_crq - Send a CRQ 722 * @vhost: ibmvfc host struct 723 * @word1: the first 64 bits of the data 724 * @word2: the second 64 bits of the data 725 * 726 * Return value: 727 * 0 on success / other on failure 728 **/ 729 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 730 { 731 struct vio_dev *vdev = to_vio_dev(vhost->dev); 732 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 733 } 734 735 static int ibmvfc_send_sub_crq(struct ibmvfc_host *vhost, u64 cookie, u64 word1, 736 u64 word2, u64 word3, u64 word4) 737 { 738 struct vio_dev *vdev = to_vio_dev(vhost->dev); 739 740 return plpar_hcall_norets(H_SEND_SUB_CRQ, vdev->unit_address, cookie, 741 word1, word2, word3, word4); 742 } 743 744 /** 745 * ibmvfc_send_crq_init - Send a CRQ init message 746 * @vhost: ibmvfc host struct 747 * 748 * Return value: 749 * 0 on success / other on failure 750 **/ 751 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 752 { 753 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 754 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 755 } 756 757 /** 758 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 759 * @vhost: ibmvfc host struct 760 * 761 * Return value: 762 * 0 on success / other on failure 763 **/ 764 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 765 { 766 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 767 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 768 } 769 770 /** 771 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 772 * @vhost: ibmvfc host who owns the event pool 773 * @queue: ibmvfc queue struct 774 * @size: pool size 775 * 776 * Returns zero on success. 777 **/ 778 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost, 779 struct ibmvfc_queue *queue, 780 unsigned int size) 781 { 782 int i; 783 struct ibmvfc_event_pool *pool = &queue->evt_pool; 784 785 ENTER; 786 if (!size) 787 return 0; 788 789 pool->size = size; 790 pool->events = kcalloc(size, sizeof(*pool->events), GFP_KERNEL); 791 if (!pool->events) 792 return -ENOMEM; 793 794 pool->iu_storage = dma_alloc_coherent(vhost->dev, 795 size * sizeof(*pool->iu_storage), 796 &pool->iu_token, 0); 797 798 if (!pool->iu_storage) { 799 kfree(pool->events); 800 return -ENOMEM; 801 } 802 803 INIT_LIST_HEAD(&queue->sent); 804 INIT_LIST_HEAD(&queue->free); 805 spin_lock_init(&queue->l_lock); 806 807 for (i = 0; i < size; ++i) { 808 struct ibmvfc_event *evt = &pool->events[i]; 809 810 atomic_set(&evt->free, 1); 811 evt->crq.valid = 0x80; 812 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i)); 813 evt->xfer_iu = pool->iu_storage + i; 814 evt->vhost = vhost; 815 evt->queue = queue; 816 evt->ext_list = NULL; 817 list_add_tail(&evt->queue_list, &queue->free); 818 } 819 820 LEAVE; 821 return 0; 822 } 823 824 /** 825 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 826 * @vhost: ibmvfc host who owns the event pool 827 * @queue: ibmvfc queue struct 828 * 829 **/ 830 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost, 831 struct ibmvfc_queue *queue) 832 { 833 int i; 834 struct ibmvfc_event_pool *pool = &queue->evt_pool; 835 836 ENTER; 837 for (i = 0; i < pool->size; ++i) { 838 list_del(&pool->events[i].queue_list); 839 BUG_ON(atomic_read(&pool->events[i].free) != 1); 840 if (pool->events[i].ext_list) 841 dma_pool_free(vhost->sg_pool, 842 pool->events[i].ext_list, 843 pool->events[i].ext_list_token); 844 } 845 846 kfree(pool->events); 847 dma_free_coherent(vhost->dev, 848 pool->size * sizeof(*pool->iu_storage), 849 pool->iu_storage, pool->iu_token); 850 LEAVE; 851 } 852 853 /** 854 * ibmvfc_free_queue - Deallocate queue 855 * @vhost: ibmvfc host struct 856 * @queue: ibmvfc queue struct 857 * 858 * Unmaps dma and deallocates page for messages 859 **/ 860 static void ibmvfc_free_queue(struct ibmvfc_host *vhost, 861 struct ibmvfc_queue *queue) 862 { 863 struct device *dev = vhost->dev; 864 865 dma_unmap_single(dev, queue->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 866 free_page((unsigned long)queue->msgs.handle); 867 queue->msgs.handle = NULL; 868 869 ibmvfc_free_event_pool(vhost, queue); 870 } 871 872 /** 873 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 874 * @vhost: ibmvfc host struct 875 * 876 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 877 * the crq with the hypervisor. 878 **/ 879 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 880 { 881 long rc = 0; 882 struct vio_dev *vdev = to_vio_dev(vhost->dev); 883 struct ibmvfc_queue *crq = &vhost->crq; 884 885 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 886 free_irq(vdev->irq, vhost); 887 tasklet_kill(&vhost->tasklet); 888 do { 889 if (rc) 890 msleep(100); 891 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 892 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 893 894 vhost->state = IBMVFC_NO_CRQ; 895 vhost->logged_in = 0; 896 897 ibmvfc_free_queue(vhost, crq); 898 } 899 900 /** 901 * ibmvfc_reenable_crq_queue - reenables the CRQ 902 * @vhost: ibmvfc host struct 903 * 904 * Return value: 905 * 0 on success / other on failure 906 **/ 907 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 908 { 909 int rc = 0; 910 struct vio_dev *vdev = to_vio_dev(vhost->dev); 911 unsigned long flags; 912 913 ibmvfc_release_sub_crqs(vhost); 914 915 /* Re-enable the CRQ */ 916 do { 917 if (rc) 918 msleep(100); 919 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 920 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 921 922 if (rc) 923 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 924 925 spin_lock_irqsave(vhost->host->host_lock, flags); 926 spin_lock(vhost->crq.q_lock); 927 vhost->do_enquiry = 1; 928 vhost->using_channels = 0; 929 spin_unlock(vhost->crq.q_lock); 930 spin_unlock_irqrestore(vhost->host->host_lock, flags); 931 932 ibmvfc_init_sub_crqs(vhost); 933 934 return rc; 935 } 936 937 /** 938 * ibmvfc_reset_crq - resets a crq after a failure 939 * @vhost: ibmvfc host struct 940 * 941 * Return value: 942 * 0 on success / other on failure 943 **/ 944 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 945 { 946 int rc = 0; 947 unsigned long flags; 948 struct vio_dev *vdev = to_vio_dev(vhost->dev); 949 struct ibmvfc_queue *crq = &vhost->crq; 950 951 ibmvfc_release_sub_crqs(vhost); 952 953 /* Close the CRQ */ 954 do { 955 if (rc) 956 msleep(100); 957 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 958 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 959 960 spin_lock_irqsave(vhost->host->host_lock, flags); 961 spin_lock(vhost->crq.q_lock); 962 vhost->state = IBMVFC_NO_CRQ; 963 vhost->logged_in = 0; 964 vhost->do_enquiry = 1; 965 vhost->using_channels = 0; 966 967 /* Clean out the queue */ 968 memset(crq->msgs.crq, 0, PAGE_SIZE); 969 crq->cur = 0; 970 971 /* And re-open it again */ 972 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 973 crq->msg_token, PAGE_SIZE); 974 975 if (rc == H_CLOSED) 976 /* Adapter is good, but other end is not ready */ 977 dev_warn(vhost->dev, "Partner adapter not ready\n"); 978 else if (rc != 0) 979 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 980 981 spin_unlock(vhost->crq.q_lock); 982 spin_unlock_irqrestore(vhost->host->host_lock, flags); 983 984 ibmvfc_init_sub_crqs(vhost); 985 986 return rc; 987 } 988 989 /** 990 * ibmvfc_valid_event - Determines if event is valid. 991 * @pool: event_pool that contains the event 992 * @evt: ibmvfc event to be checked for validity 993 * 994 * Return value: 995 * 1 if event is valid / 0 if event is not valid 996 **/ 997 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 998 struct ibmvfc_event *evt) 999 { 1000 int index = evt - pool->events; 1001 if (index < 0 || index >= pool->size) /* outside of bounds */ 1002 return 0; 1003 if (evt != pool->events + index) /* unaligned */ 1004 return 0; 1005 return 1; 1006 } 1007 1008 /** 1009 * ibmvfc_free_event - Free the specified event 1010 * @evt: ibmvfc_event to be freed 1011 * 1012 **/ 1013 static void ibmvfc_free_event(struct ibmvfc_event *evt) 1014 { 1015 struct ibmvfc_event_pool *pool = &evt->queue->evt_pool; 1016 unsigned long flags; 1017 1018 BUG_ON(!ibmvfc_valid_event(pool, evt)); 1019 BUG_ON(atomic_inc_return(&evt->free) != 1); 1020 1021 spin_lock_irqsave(&evt->queue->l_lock, flags); 1022 list_add_tail(&evt->queue_list, &evt->queue->free); 1023 if (evt->eh_comp) 1024 complete(evt->eh_comp); 1025 spin_unlock_irqrestore(&evt->queue->l_lock, flags); 1026 } 1027 1028 /** 1029 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 1030 * @evt: ibmvfc event struct 1031 * 1032 * This function does not setup any error status, that must be done 1033 * before this function gets called. 1034 **/ 1035 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 1036 { 1037 struct scsi_cmnd *cmnd = evt->cmnd; 1038 1039 if (cmnd) { 1040 scsi_dma_unmap(cmnd); 1041 cmnd->scsi_done(cmnd); 1042 } 1043 1044 ibmvfc_free_event(evt); 1045 } 1046 1047 /** 1048 * ibmvfc_complete_purge - Complete failed command list 1049 * @purge_list: list head of failed commands 1050 * 1051 * This function runs completions on commands to fail as a result of a 1052 * host reset or platform migration. 1053 **/ 1054 static void ibmvfc_complete_purge(struct list_head *purge_list) 1055 { 1056 struct ibmvfc_event *evt, *pos; 1057 1058 list_for_each_entry_safe(evt, pos, purge_list, queue_list) { 1059 list_del(&evt->queue_list); 1060 ibmvfc_trc_end(evt); 1061 evt->done(evt); 1062 } 1063 } 1064 1065 /** 1066 * ibmvfc_fail_request - Fail request with specified error code 1067 * @evt: ibmvfc event struct 1068 * @error_code: error code to fail request with 1069 * 1070 * Return value: 1071 * none 1072 **/ 1073 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 1074 { 1075 if (evt->cmnd) { 1076 evt->cmnd->result = (error_code << 16); 1077 evt->done = ibmvfc_scsi_eh_done; 1078 } else 1079 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED); 1080 1081 del_timer(&evt->timer); 1082 } 1083 1084 /** 1085 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 1086 * @vhost: ibmvfc host struct 1087 * @error_code: error code to fail requests with 1088 * 1089 * Return value: 1090 * none 1091 **/ 1092 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 1093 { 1094 struct ibmvfc_event *evt, *pos; 1095 struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; 1096 unsigned long flags; 1097 int hwqs = 0; 1098 int i; 1099 1100 if (vhost->using_channels) 1101 hwqs = vhost->scsi_scrqs.active_queues; 1102 1103 ibmvfc_dbg(vhost, "Purging all requests\n"); 1104 spin_lock_irqsave(&vhost->crq.l_lock, flags); 1105 list_for_each_entry_safe(evt, pos, &vhost->crq.sent, queue_list) 1106 ibmvfc_fail_request(evt, error_code); 1107 list_splice_init(&vhost->crq.sent, &vhost->purge); 1108 spin_unlock_irqrestore(&vhost->crq.l_lock, flags); 1109 1110 for (i = 0; i < hwqs; i++) { 1111 spin_lock_irqsave(queues[i].q_lock, flags); 1112 spin_lock(&queues[i].l_lock); 1113 list_for_each_entry_safe(evt, pos, &queues[i].sent, queue_list) 1114 ibmvfc_fail_request(evt, error_code); 1115 list_splice_init(&queues[i].sent, &vhost->purge); 1116 spin_unlock(&queues[i].l_lock); 1117 spin_unlock_irqrestore(queues[i].q_lock, flags); 1118 } 1119 } 1120 1121 /** 1122 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 1123 * @vhost: struct ibmvfc host to reset 1124 **/ 1125 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 1126 { 1127 ibmvfc_purge_requests(vhost, DID_ERROR); 1128 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 1129 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 1130 } 1131 1132 /** 1133 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 1134 * @vhost: struct ibmvfc host to reset 1135 **/ 1136 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 1137 { 1138 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 1139 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 1140 scsi_block_requests(vhost->host); 1141 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 1142 vhost->job_step = ibmvfc_npiv_logout; 1143 wake_up(&vhost->work_wait_q); 1144 } else 1145 ibmvfc_hard_reset_host(vhost); 1146 } 1147 1148 /** 1149 * ibmvfc_reset_host - Reset the connection to the server 1150 * @vhost: ibmvfc host struct 1151 **/ 1152 static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 1153 { 1154 unsigned long flags; 1155 1156 spin_lock_irqsave(vhost->host->host_lock, flags); 1157 __ibmvfc_reset_host(vhost); 1158 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1159 } 1160 1161 /** 1162 * ibmvfc_retry_host_init - Retry host initialization if allowed 1163 * @vhost: ibmvfc host struct 1164 * 1165 * Returns: 1 if init will be retried / 0 if not 1166 * 1167 **/ 1168 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 1169 { 1170 int retry = 0; 1171 1172 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 1173 vhost->delay_init = 1; 1174 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 1175 dev_err(vhost->dev, 1176 "Host initialization retries exceeded. Taking adapter offline\n"); 1177 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 1178 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 1179 __ibmvfc_reset_host(vhost); 1180 else { 1181 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 1182 retry = 1; 1183 } 1184 } 1185 1186 wake_up(&vhost->work_wait_q); 1187 return retry; 1188 } 1189 1190 /** 1191 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 1192 * @starget: scsi target struct 1193 * 1194 * Return value: 1195 * ibmvfc_target struct / NULL if not found 1196 **/ 1197 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 1198 { 1199 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 1200 struct ibmvfc_host *vhost = shost_priv(shost); 1201 struct ibmvfc_target *tgt; 1202 1203 list_for_each_entry(tgt, &vhost->targets, queue) 1204 if (tgt->target_id == starget->id) { 1205 kref_get(&tgt->kref); 1206 return tgt; 1207 } 1208 return NULL; 1209 } 1210 1211 /** 1212 * ibmvfc_get_target - Find the specified scsi_target 1213 * @starget: scsi target struct 1214 * 1215 * Return value: 1216 * ibmvfc_target struct / NULL if not found 1217 **/ 1218 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 1219 { 1220 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 1221 struct ibmvfc_target *tgt; 1222 unsigned long flags; 1223 1224 spin_lock_irqsave(shost->host_lock, flags); 1225 tgt = __ibmvfc_get_target(starget); 1226 spin_unlock_irqrestore(shost->host_lock, flags); 1227 return tgt; 1228 } 1229 1230 /** 1231 * ibmvfc_get_host_speed - Get host port speed 1232 * @shost: scsi host struct 1233 * 1234 * Return value: 1235 * none 1236 **/ 1237 static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 1238 { 1239 struct ibmvfc_host *vhost = shost_priv(shost); 1240 unsigned long flags; 1241 1242 spin_lock_irqsave(shost->host_lock, flags); 1243 if (vhost->state == IBMVFC_ACTIVE) { 1244 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) { 1245 case 1: 1246 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 1247 break; 1248 case 2: 1249 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 1250 break; 1251 case 4: 1252 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 1253 break; 1254 case 8: 1255 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 1256 break; 1257 case 10: 1258 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 1259 break; 1260 case 16: 1261 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 1262 break; 1263 default: 1264 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 1265 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100); 1266 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 1267 break; 1268 } 1269 } else 1270 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 1271 spin_unlock_irqrestore(shost->host_lock, flags); 1272 } 1273 1274 /** 1275 * ibmvfc_get_host_port_state - Get host port state 1276 * @shost: scsi host struct 1277 * 1278 * Return value: 1279 * none 1280 **/ 1281 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 1282 { 1283 struct ibmvfc_host *vhost = shost_priv(shost); 1284 unsigned long flags; 1285 1286 spin_lock_irqsave(shost->host_lock, flags); 1287 switch (vhost->state) { 1288 case IBMVFC_INITIALIZING: 1289 case IBMVFC_ACTIVE: 1290 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 1291 break; 1292 case IBMVFC_LINK_DOWN: 1293 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 1294 break; 1295 case IBMVFC_LINK_DEAD: 1296 case IBMVFC_HOST_OFFLINE: 1297 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1298 break; 1299 case IBMVFC_HALTED: 1300 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1301 break; 1302 case IBMVFC_NO_CRQ: 1303 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1304 break; 1305 default: 1306 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1307 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1308 break; 1309 } 1310 spin_unlock_irqrestore(shost->host_lock, flags); 1311 } 1312 1313 /** 1314 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1315 * @rport: rport struct 1316 * @timeout: timeout value 1317 * 1318 * Return value: 1319 * none 1320 **/ 1321 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1322 { 1323 if (timeout) 1324 rport->dev_loss_tmo = timeout; 1325 else 1326 rport->dev_loss_tmo = 1; 1327 } 1328 1329 /** 1330 * ibmvfc_release_tgt - Free memory allocated for a target 1331 * @kref: kref struct 1332 * 1333 **/ 1334 static void ibmvfc_release_tgt(struct kref *kref) 1335 { 1336 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1337 kfree(tgt); 1338 } 1339 1340 /** 1341 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1342 * @starget: scsi target struct 1343 * 1344 * Return value: 1345 * none 1346 **/ 1347 static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1348 { 1349 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1350 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1351 if (tgt) 1352 kref_put(&tgt->kref, ibmvfc_release_tgt); 1353 } 1354 1355 /** 1356 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1357 * @starget: scsi target struct 1358 * 1359 * Return value: 1360 * none 1361 **/ 1362 static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1363 { 1364 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1365 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1366 if (tgt) 1367 kref_put(&tgt->kref, ibmvfc_release_tgt); 1368 } 1369 1370 /** 1371 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1372 * @starget: scsi target struct 1373 * 1374 * Return value: 1375 * none 1376 **/ 1377 static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1378 { 1379 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1380 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1381 if (tgt) 1382 kref_put(&tgt->kref, ibmvfc_release_tgt); 1383 } 1384 1385 /** 1386 * ibmvfc_wait_while_resetting - Wait while the host resets 1387 * @vhost: ibmvfc host struct 1388 * 1389 * Return value: 1390 * 0 on success / other on failure 1391 **/ 1392 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1393 { 1394 long timeout = wait_event_timeout(vhost->init_wait_q, 1395 ((vhost->state == IBMVFC_ACTIVE || 1396 vhost->state == IBMVFC_HOST_OFFLINE || 1397 vhost->state == IBMVFC_LINK_DEAD) && 1398 vhost->action == IBMVFC_HOST_ACTION_NONE), 1399 (init_timeout * HZ)); 1400 1401 return timeout ? 0 : -EIO; 1402 } 1403 1404 /** 1405 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1406 * @shost: scsi host struct 1407 * 1408 * Return value: 1409 * 0 on success / other on failure 1410 **/ 1411 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1412 { 1413 struct ibmvfc_host *vhost = shost_priv(shost); 1414 1415 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1416 ibmvfc_reset_host(vhost); 1417 return ibmvfc_wait_while_resetting(vhost); 1418 } 1419 1420 /** 1421 * ibmvfc_gather_partition_info - Gather info about the LPAR 1422 * @vhost: ibmvfc host struct 1423 * 1424 * Return value: 1425 * none 1426 **/ 1427 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1428 { 1429 struct device_node *rootdn; 1430 const char *name; 1431 const unsigned int *num; 1432 1433 rootdn = of_find_node_by_path("/"); 1434 if (!rootdn) 1435 return; 1436 1437 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1438 if (name) 1439 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1440 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1441 if (num) 1442 vhost->partition_number = *num; 1443 of_node_put(rootdn); 1444 } 1445 1446 /** 1447 * ibmvfc_set_login_info - Setup info for NPIV login 1448 * @vhost: ibmvfc host struct 1449 * 1450 * Return value: 1451 * none 1452 **/ 1453 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1454 { 1455 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1456 struct ibmvfc_queue *async_crq = &vhost->async_crq; 1457 struct device_node *of_node = vhost->dev->of_node; 1458 const char *location; 1459 1460 memset(login_info, 0, sizeof(*login_info)); 1461 1462 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX); 1463 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); 1464 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); 1465 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); 1466 login_info->partition_num = cpu_to_be32(vhost->partition_number); 1467 login_info->vfc_frame_version = cpu_to_be32(1); 1468 login_info->fcp_version = cpu_to_be16(3); 1469 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); 1470 if (vhost->client_migrated) 1471 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); 1472 1473 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ); 1474 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE | IBMVFC_CAN_SEND_VF_WWPN); 1475 1476 if (vhost->mq_enabled || vhost->using_channels) 1477 login_info->capabilities |= cpu_to_be64(IBMVFC_CAN_USE_CHANNELS); 1478 1479 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); 1480 login_info->async.len = cpu_to_be32(async_crq->size * 1481 sizeof(*async_crq->msgs.async)); 1482 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1483 strncpy(login_info->device_name, 1484 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1485 1486 location = of_get_property(of_node, "ibm,loc-code", NULL); 1487 location = location ? location : dev_name(vhost->dev); 1488 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1489 } 1490 1491 /** 1492 * ibmvfc_get_event - Gets the next free event in pool 1493 * @queue: ibmvfc queue struct 1494 * 1495 * Returns a free event from the pool. 1496 **/ 1497 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_queue *queue) 1498 { 1499 struct ibmvfc_event *evt; 1500 unsigned long flags; 1501 1502 spin_lock_irqsave(&queue->l_lock, flags); 1503 BUG_ON(list_empty(&queue->free)); 1504 evt = list_entry(queue->free.next, struct ibmvfc_event, queue_list); 1505 atomic_set(&evt->free, 0); 1506 list_del(&evt->queue_list); 1507 spin_unlock_irqrestore(&queue->l_lock, flags); 1508 return evt; 1509 } 1510 1511 /** 1512 * ibmvfc_locked_done - Calls evt completion with host_lock held 1513 * @evt: ibmvfc evt to complete 1514 * 1515 * All non-scsi command completion callbacks have the expectation that the 1516 * host_lock is held. This callback is used by ibmvfc_init_event to wrap a 1517 * MAD evt with the host_lock. 1518 **/ 1519 static void ibmvfc_locked_done(struct ibmvfc_event *evt) 1520 { 1521 unsigned long flags; 1522 1523 spin_lock_irqsave(evt->vhost->host->host_lock, flags); 1524 evt->_done(evt); 1525 spin_unlock_irqrestore(evt->vhost->host->host_lock, flags); 1526 } 1527 1528 /** 1529 * ibmvfc_init_event - Initialize fields in an event struct that are always 1530 * required. 1531 * @evt: The event 1532 * @done: Routine to call when the event is responded to 1533 * @format: SRP or MAD format 1534 **/ 1535 static void ibmvfc_init_event(struct ibmvfc_event *evt, 1536 void (*done) (struct ibmvfc_event *), u8 format) 1537 { 1538 evt->cmnd = NULL; 1539 evt->sync_iu = NULL; 1540 evt->eh_comp = NULL; 1541 evt->crq.format = format; 1542 if (format == IBMVFC_CMD_FORMAT) 1543 evt->done = done; 1544 else { 1545 evt->_done = done; 1546 evt->done = ibmvfc_locked_done; 1547 } 1548 evt->hwq = 0; 1549 } 1550 1551 /** 1552 * ibmvfc_map_sg_list - Initialize scatterlist 1553 * @scmd: scsi command struct 1554 * @nseg: number of scatterlist segments 1555 * @md: memory descriptor list to initialize 1556 **/ 1557 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1558 struct srp_direct_buf *md) 1559 { 1560 int i; 1561 struct scatterlist *sg; 1562 1563 scsi_for_each_sg(scmd, sg, nseg, i) { 1564 md[i].va = cpu_to_be64(sg_dma_address(sg)); 1565 md[i].len = cpu_to_be32(sg_dma_len(sg)); 1566 md[i].key = 0; 1567 } 1568 } 1569 1570 /** 1571 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes descriptor fields 1572 * @scmd: struct scsi_cmnd with the scatterlist 1573 * @evt: ibmvfc event struct 1574 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1575 * @dev: device for which to map dma memory 1576 * 1577 * Returns: 1578 * 0 on success / non-zero on failure 1579 **/ 1580 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1581 struct ibmvfc_event *evt, 1582 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1583 { 1584 1585 int sg_mapped; 1586 struct srp_direct_buf *data = &vfc_cmd->ioba; 1587 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1588 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(evt->vhost, vfc_cmd); 1589 1590 if (cls3_error) 1591 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR); 1592 1593 sg_mapped = scsi_dma_map(scmd); 1594 if (!sg_mapped) { 1595 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC); 1596 return 0; 1597 } else if (unlikely(sg_mapped < 0)) { 1598 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1599 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1600 return sg_mapped; 1601 } 1602 1603 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1604 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE); 1605 iu->add_cdb_len |= IBMVFC_WRDATA; 1606 } else { 1607 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ); 1608 iu->add_cdb_len |= IBMVFC_RDDATA; 1609 } 1610 1611 if (sg_mapped == 1) { 1612 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1613 return 0; 1614 } 1615 1616 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST); 1617 1618 if (!evt->ext_list) { 1619 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1620 &evt->ext_list_token); 1621 1622 if (!evt->ext_list) { 1623 scsi_dma_unmap(scmd); 1624 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1625 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1626 return -ENOMEM; 1627 } 1628 } 1629 1630 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1631 1632 data->va = cpu_to_be64(evt->ext_list_token); 1633 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf)); 1634 data->key = 0; 1635 return 0; 1636 } 1637 1638 /** 1639 * ibmvfc_timeout - Internal command timeout handler 1640 * @t: struct ibmvfc_event that timed out 1641 * 1642 * Called when an internally generated command times out 1643 **/ 1644 static void ibmvfc_timeout(struct timer_list *t) 1645 { 1646 struct ibmvfc_event *evt = from_timer(evt, t, timer); 1647 struct ibmvfc_host *vhost = evt->vhost; 1648 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1649 ibmvfc_reset_host(vhost); 1650 } 1651 1652 /** 1653 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1654 * @evt: event to be sent 1655 * @vhost: ibmvfc host struct 1656 * @timeout: timeout in seconds - 0 means do not time command 1657 * 1658 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1659 **/ 1660 static int ibmvfc_send_event(struct ibmvfc_event *evt, 1661 struct ibmvfc_host *vhost, unsigned long timeout) 1662 { 1663 __be64 *crq_as_u64 = (__be64 *) &evt->crq; 1664 unsigned long flags; 1665 int rc; 1666 1667 /* Copy the IU into the transfer area */ 1668 *evt->xfer_iu = evt->iu; 1669 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1670 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); 1671 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1672 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); 1673 else 1674 BUG(); 1675 1676 timer_setup(&evt->timer, ibmvfc_timeout, 0); 1677 1678 if (timeout) { 1679 evt->timer.expires = jiffies + (timeout * HZ); 1680 add_timer(&evt->timer); 1681 } 1682 1683 spin_lock_irqsave(&evt->queue->l_lock, flags); 1684 list_add_tail(&evt->queue_list, &evt->queue->sent); 1685 1686 mb(); 1687 1688 if (evt->queue->fmt == IBMVFC_SUB_CRQ_FMT) 1689 rc = ibmvfc_send_sub_crq(vhost, 1690 evt->queue->vios_cookie, 1691 be64_to_cpu(crq_as_u64[0]), 1692 be64_to_cpu(crq_as_u64[1]), 1693 0, 0); 1694 else 1695 rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), 1696 be64_to_cpu(crq_as_u64[1])); 1697 1698 if (rc) { 1699 list_del(&evt->queue_list); 1700 spin_unlock_irqrestore(&evt->queue->l_lock, flags); 1701 del_timer(&evt->timer); 1702 1703 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1704 * Firmware will send a CRQ with a transport event (0xFF) to 1705 * tell this client what has happened to the transport. This 1706 * will be handled in ibmvfc_handle_crq() 1707 */ 1708 if (rc == H_CLOSED) { 1709 if (printk_ratelimit()) 1710 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1711 if (evt->cmnd) 1712 scsi_dma_unmap(evt->cmnd); 1713 ibmvfc_free_event(evt); 1714 return SCSI_MLQUEUE_HOST_BUSY; 1715 } 1716 1717 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1718 if (evt->cmnd) { 1719 evt->cmnd->result = DID_ERROR << 16; 1720 evt->done = ibmvfc_scsi_eh_done; 1721 } else 1722 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); 1723 1724 evt->done(evt); 1725 } else { 1726 spin_unlock_irqrestore(&evt->queue->l_lock, flags); 1727 ibmvfc_trc_start(evt); 1728 } 1729 1730 return 0; 1731 } 1732 1733 /** 1734 * ibmvfc_log_error - Log an error for the failed command if appropriate 1735 * @evt: ibmvfc event to log 1736 * 1737 **/ 1738 static void ibmvfc_log_error(struct ibmvfc_event *evt) 1739 { 1740 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1741 struct ibmvfc_host *vhost = evt->vhost; 1742 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 1743 struct scsi_cmnd *cmnd = evt->cmnd; 1744 const char *err = unknown_error; 1745 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 1746 int logerr = 0; 1747 int rsp_code = 0; 1748 1749 if (index >= 0) { 1750 logerr = cmd_status[index].log; 1751 err = cmd_status[index].name; 1752 } 1753 1754 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1755 return; 1756 1757 if (rsp->flags & FCP_RSP_LEN_VALID) 1758 rsp_code = rsp->data.info.rsp_code; 1759 1760 scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) " 1761 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1762 cmnd->cmnd[0], err, be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error), 1763 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1764 } 1765 1766 /** 1767 * ibmvfc_relogin - Log back into the specified device 1768 * @sdev: scsi device struct 1769 * 1770 **/ 1771 static void ibmvfc_relogin(struct scsi_device *sdev) 1772 { 1773 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1774 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1775 struct ibmvfc_target *tgt; 1776 unsigned long flags; 1777 1778 spin_lock_irqsave(vhost->host->host_lock, flags); 1779 list_for_each_entry(tgt, &vhost->targets, queue) { 1780 if (rport == tgt->rport) { 1781 ibmvfc_del_tgt(tgt); 1782 break; 1783 } 1784 } 1785 1786 ibmvfc_reinit_host(vhost); 1787 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1788 } 1789 1790 /** 1791 * ibmvfc_scsi_done - Handle responses from commands 1792 * @evt: ibmvfc event to be handled 1793 * 1794 * Used as a callback when sending scsi cmds. 1795 **/ 1796 static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1797 { 1798 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1799 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(evt->vhost, vfc_cmd); 1800 struct scsi_cmnd *cmnd = evt->cmnd; 1801 u32 rsp_len = 0; 1802 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); 1803 1804 if (cmnd) { 1805 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) 1806 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); 1807 else if (rsp->flags & FCP_RESID_UNDER) 1808 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); 1809 else 1810 scsi_set_resid(cmnd, 0); 1811 1812 if (vfc_cmd->status) { 1813 cmnd->result = ibmvfc_get_err_result(evt->vhost, vfc_cmd); 1814 1815 if (rsp->flags & FCP_RSP_LEN_VALID) 1816 rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 1817 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1818 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1819 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1820 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1821 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && 1822 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) 1823 ibmvfc_relogin(cmnd->device); 1824 1825 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1826 cmnd->result = (DID_ERROR << 16); 1827 1828 ibmvfc_log_error(evt); 1829 } 1830 1831 if (!cmnd->result && 1832 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1833 cmnd->result = (DID_ERROR << 16); 1834 1835 scsi_dma_unmap(cmnd); 1836 cmnd->scsi_done(cmnd); 1837 } 1838 1839 ibmvfc_free_event(evt); 1840 } 1841 1842 /** 1843 * ibmvfc_host_chkready - Check if the host can accept commands 1844 * @vhost: struct ibmvfc host 1845 * 1846 * Returns: 1847 * 1 if host can accept command / 0 if not 1848 **/ 1849 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1850 { 1851 int result = 0; 1852 1853 switch (vhost->state) { 1854 case IBMVFC_LINK_DEAD: 1855 case IBMVFC_HOST_OFFLINE: 1856 result = DID_NO_CONNECT << 16; 1857 break; 1858 case IBMVFC_NO_CRQ: 1859 case IBMVFC_INITIALIZING: 1860 case IBMVFC_HALTED: 1861 case IBMVFC_LINK_DOWN: 1862 result = DID_REQUEUE << 16; 1863 break; 1864 case IBMVFC_ACTIVE: 1865 result = 0; 1866 break; 1867 } 1868 1869 return result; 1870 } 1871 1872 static struct ibmvfc_cmd *ibmvfc_init_vfc_cmd(struct ibmvfc_event *evt, struct scsi_device *sdev) 1873 { 1874 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1875 struct ibmvfc_host *vhost = evt->vhost; 1876 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 1877 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 1878 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 1879 size_t offset; 1880 1881 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1882 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 1883 offset = offsetof(struct ibmvfc_cmd, v2.rsp); 1884 vfc_cmd->target_wwpn = cpu_to_be64(rport->port_name); 1885 } else 1886 offset = offsetof(struct ibmvfc_cmd, v1.rsp); 1887 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offset); 1888 vfc_cmd->resp.len = cpu_to_be32(sizeof(*rsp)); 1889 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1890 vfc_cmd->payload_len = cpu_to_be32(sizeof(*iu)); 1891 vfc_cmd->resp_len = cpu_to_be32(sizeof(*rsp)); 1892 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 1893 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); 1894 int_to_scsilun(sdev->lun, &iu->lun); 1895 1896 return vfc_cmd; 1897 } 1898 1899 /** 1900 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1901 * @shost: scsi host struct 1902 * @cmnd: struct scsi_cmnd to be executed 1903 * 1904 * Returns: 1905 * 0 on success / other on failure 1906 **/ 1907 static int ibmvfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) 1908 { 1909 struct ibmvfc_host *vhost = shost_priv(shost); 1910 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1911 struct ibmvfc_cmd *vfc_cmd; 1912 struct ibmvfc_fcp_cmd_iu *iu; 1913 struct ibmvfc_event *evt; 1914 u32 tag_and_hwq = blk_mq_unique_tag(scsi_cmd_to_rq(cmnd)); 1915 u16 hwq = blk_mq_unique_tag_to_hwq(tag_and_hwq); 1916 u16 scsi_channel; 1917 int rc; 1918 1919 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1920 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1921 cmnd->result = rc; 1922 cmnd->scsi_done(cmnd); 1923 return 0; 1924 } 1925 1926 cmnd->result = (DID_OK << 16); 1927 if (vhost->using_channels) { 1928 scsi_channel = hwq % vhost->scsi_scrqs.active_queues; 1929 evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[scsi_channel]); 1930 evt->hwq = hwq % vhost->scsi_scrqs.active_queues; 1931 } else 1932 evt = ibmvfc_get_event(&vhost->crq); 1933 1934 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1935 evt->cmnd = cmnd; 1936 1937 vfc_cmd = ibmvfc_init_vfc_cmd(evt, cmnd->device); 1938 iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 1939 1940 iu->xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); 1941 memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); 1942 1943 if (cmnd->flags & SCMD_TAGGED) { 1944 vfc_cmd->task_tag = cpu_to_be64(cmnd->tag); 1945 iu->pri_task_attr = IBMVFC_SIMPLE_TASK; 1946 } 1947 1948 vfc_cmd->correlation = cpu_to_be64((u64)evt); 1949 1950 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1951 return ibmvfc_send_event(evt, vhost, 0); 1952 1953 ibmvfc_free_event(evt); 1954 if (rc == -ENOMEM) 1955 return SCSI_MLQUEUE_HOST_BUSY; 1956 1957 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1958 scmd_printk(KERN_ERR, cmnd, 1959 "Failed to map DMA buffer for command. rc=%d\n", rc); 1960 1961 cmnd->result = DID_ERROR << 16; 1962 cmnd->scsi_done(cmnd); 1963 return 0; 1964 } 1965 1966 /** 1967 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1968 * @evt: ibmvfc event struct 1969 * 1970 **/ 1971 static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1972 { 1973 /* copy the response back */ 1974 if (evt->sync_iu) 1975 *evt->sync_iu = *evt->xfer_iu; 1976 1977 complete(&evt->comp); 1978 } 1979 1980 /** 1981 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 1982 * @evt: struct ibmvfc_event 1983 * 1984 **/ 1985 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 1986 { 1987 struct ibmvfc_host *vhost = evt->vhost; 1988 1989 ibmvfc_free_event(evt); 1990 vhost->aborting_passthru = 0; 1991 dev_info(vhost->dev, "Passthru command cancelled\n"); 1992 } 1993 1994 /** 1995 * ibmvfc_bsg_timeout - Handle a BSG timeout 1996 * @job: struct bsg_job that timed out 1997 * 1998 * Returns: 1999 * 0 on success / other on failure 2000 **/ 2001 static int ibmvfc_bsg_timeout(struct bsg_job *job) 2002 { 2003 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 2004 unsigned long port_id = (unsigned long)job->dd_data; 2005 struct ibmvfc_event *evt; 2006 struct ibmvfc_tmf *tmf; 2007 unsigned long flags; 2008 int rc; 2009 2010 ENTER; 2011 spin_lock_irqsave(vhost->host->host_lock, flags); 2012 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 2013 __ibmvfc_reset_host(vhost); 2014 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2015 return 0; 2016 } 2017 2018 vhost->aborting_passthru = 1; 2019 evt = ibmvfc_get_event(&vhost->crq); 2020 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 2021 2022 tmf = &evt->iu.tmf; 2023 memset(tmf, 0, sizeof(*tmf)); 2024 tmf->common.version = cpu_to_be32(1); 2025 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2026 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2027 tmf->scsi_id = cpu_to_be64(port_id); 2028 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 2029 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); 2030 rc = ibmvfc_send_event(evt, vhost, default_timeout); 2031 2032 if (rc != 0) { 2033 vhost->aborting_passthru = 0; 2034 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 2035 rc = -EIO; 2036 } else 2037 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 2038 port_id); 2039 2040 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2041 2042 LEAVE; 2043 return rc; 2044 } 2045 2046 /** 2047 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 2048 * @vhost: struct ibmvfc_host to send command 2049 * @port_id: port ID to send command 2050 * 2051 * Returns: 2052 * 0 on success / other on failure 2053 **/ 2054 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 2055 { 2056 struct ibmvfc_port_login *plogi; 2057 struct ibmvfc_target *tgt; 2058 struct ibmvfc_event *evt; 2059 union ibmvfc_iu rsp_iu; 2060 unsigned long flags; 2061 int rc = 0, issue_login = 1; 2062 2063 ENTER; 2064 spin_lock_irqsave(vhost->host->host_lock, flags); 2065 list_for_each_entry(tgt, &vhost->targets, queue) { 2066 if (tgt->scsi_id == port_id) { 2067 issue_login = 0; 2068 break; 2069 } 2070 } 2071 2072 if (!issue_login) 2073 goto unlock_out; 2074 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 2075 goto unlock_out; 2076 2077 evt = ibmvfc_get_event(&vhost->crq); 2078 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2079 plogi = &evt->iu.plogi; 2080 memset(plogi, 0, sizeof(*plogi)); 2081 plogi->common.version = cpu_to_be32(1); 2082 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 2083 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 2084 plogi->scsi_id = cpu_to_be64(port_id); 2085 evt->sync_iu = &rsp_iu; 2086 init_completion(&evt->comp); 2087 2088 rc = ibmvfc_send_event(evt, vhost, default_timeout); 2089 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2090 2091 if (rc) 2092 return -EIO; 2093 2094 wait_for_completion(&evt->comp); 2095 2096 if (rsp_iu.plogi.common.status) 2097 rc = -EIO; 2098 2099 spin_lock_irqsave(vhost->host->host_lock, flags); 2100 ibmvfc_free_event(evt); 2101 unlock_out: 2102 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2103 LEAVE; 2104 return rc; 2105 } 2106 2107 /** 2108 * ibmvfc_bsg_request - Handle a BSG request 2109 * @job: struct bsg_job to be executed 2110 * 2111 * Returns: 2112 * 0 on success / other on failure 2113 **/ 2114 static int ibmvfc_bsg_request(struct bsg_job *job) 2115 { 2116 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 2117 struct fc_rport *rport = fc_bsg_to_rport(job); 2118 struct ibmvfc_passthru_mad *mad; 2119 struct ibmvfc_event *evt; 2120 union ibmvfc_iu rsp_iu; 2121 unsigned long flags, port_id = -1; 2122 struct fc_bsg_request *bsg_request = job->request; 2123 struct fc_bsg_reply *bsg_reply = job->reply; 2124 unsigned int code = bsg_request->msgcode; 2125 int rc = 0, req_seg, rsp_seg, issue_login = 0; 2126 u32 fc_flags, rsp_len; 2127 2128 ENTER; 2129 bsg_reply->reply_payload_rcv_len = 0; 2130 if (rport) 2131 port_id = rport->port_id; 2132 2133 switch (code) { 2134 case FC_BSG_HST_ELS_NOLOGIN: 2135 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) | 2136 (bsg_request->rqst_data.h_els.port_id[1] << 8) | 2137 bsg_request->rqst_data.h_els.port_id[2]; 2138 fallthrough; 2139 case FC_BSG_RPT_ELS: 2140 fc_flags = IBMVFC_FC_ELS; 2141 break; 2142 case FC_BSG_HST_CT: 2143 issue_login = 1; 2144 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) | 2145 (bsg_request->rqst_data.h_ct.port_id[1] << 8) | 2146 bsg_request->rqst_data.h_ct.port_id[2]; 2147 fallthrough; 2148 case FC_BSG_RPT_CT: 2149 fc_flags = IBMVFC_FC_CT_IU; 2150 break; 2151 default: 2152 return -ENOTSUPP; 2153 } 2154 2155 if (port_id == -1) 2156 return -EINVAL; 2157 if (!mutex_trylock(&vhost->passthru_mutex)) 2158 return -EBUSY; 2159 2160 job->dd_data = (void *)port_id; 2161 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 2162 job->request_payload.sg_cnt, DMA_TO_DEVICE); 2163 2164 if (!req_seg) { 2165 mutex_unlock(&vhost->passthru_mutex); 2166 return -ENOMEM; 2167 } 2168 2169 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 2170 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 2171 2172 if (!rsp_seg) { 2173 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 2174 job->request_payload.sg_cnt, DMA_TO_DEVICE); 2175 mutex_unlock(&vhost->passthru_mutex); 2176 return -ENOMEM; 2177 } 2178 2179 if (req_seg > 1 || rsp_seg > 1) { 2180 rc = -EINVAL; 2181 goto out; 2182 } 2183 2184 if (issue_login) 2185 rc = ibmvfc_bsg_plogi(vhost, port_id); 2186 2187 spin_lock_irqsave(vhost->host->host_lock, flags); 2188 2189 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 2190 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 2191 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2192 goto out; 2193 } 2194 2195 evt = ibmvfc_get_event(&vhost->crq); 2196 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2197 mad = &evt->iu.passthru; 2198 2199 memset(mad, 0, sizeof(*mad)); 2200 mad->common.version = cpu_to_be32(1); 2201 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 2202 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 2203 2204 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + 2205 offsetof(struct ibmvfc_passthru_mad, iu)); 2206 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 2207 2208 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); 2209 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); 2210 mad->iu.flags = cpu_to_be32(fc_flags); 2211 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 2212 2213 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); 2214 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); 2215 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); 2216 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); 2217 mad->iu.scsi_id = cpu_to_be64(port_id); 2218 mad->iu.tag = cpu_to_be64((u64)evt); 2219 rsp_len = be32_to_cpu(mad->iu.rsp.len); 2220 2221 evt->sync_iu = &rsp_iu; 2222 init_completion(&evt->comp); 2223 rc = ibmvfc_send_event(evt, vhost, 0); 2224 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2225 2226 if (rc) { 2227 rc = -EIO; 2228 goto out; 2229 } 2230 2231 wait_for_completion(&evt->comp); 2232 2233 if (rsp_iu.passthru.common.status) 2234 rc = -EIO; 2235 else 2236 bsg_reply->reply_payload_rcv_len = rsp_len; 2237 2238 spin_lock_irqsave(vhost->host->host_lock, flags); 2239 ibmvfc_free_event(evt); 2240 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2241 bsg_reply->result = rc; 2242 bsg_job_done(job, bsg_reply->result, 2243 bsg_reply->reply_payload_rcv_len); 2244 rc = 0; 2245 out: 2246 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 2247 job->request_payload.sg_cnt, DMA_TO_DEVICE); 2248 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 2249 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 2250 mutex_unlock(&vhost->passthru_mutex); 2251 LEAVE; 2252 return rc; 2253 } 2254 2255 /** 2256 * ibmvfc_reset_device - Reset the device with the specified reset type 2257 * @sdev: scsi device to reset 2258 * @type: reset type 2259 * @desc: reset type description for log messages 2260 * 2261 * Returns: 2262 * 0 on success / other on failure 2263 **/ 2264 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 2265 { 2266 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2267 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2268 struct ibmvfc_cmd *tmf; 2269 struct ibmvfc_event *evt = NULL; 2270 union ibmvfc_iu rsp_iu; 2271 struct ibmvfc_fcp_cmd_iu *iu; 2272 struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); 2273 int rsp_rc = -EBUSY; 2274 unsigned long flags; 2275 int rsp_code = 0; 2276 2277 spin_lock_irqsave(vhost->host->host_lock, flags); 2278 if (vhost->state == IBMVFC_ACTIVE) { 2279 if (vhost->using_channels) 2280 evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[0]); 2281 else 2282 evt = ibmvfc_get_event(&vhost->crq); 2283 2284 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2285 tmf = ibmvfc_init_vfc_cmd(evt, sdev); 2286 iu = ibmvfc_get_fcp_iu(vhost, tmf); 2287 2288 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2289 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 2290 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2291 iu->tmf_flags = type; 2292 evt->sync_iu = &rsp_iu; 2293 2294 init_completion(&evt->comp); 2295 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2296 } 2297 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2298 2299 if (rsp_rc != 0) { 2300 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 2301 desc, rsp_rc); 2302 return -EIO; 2303 } 2304 2305 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2306 wait_for_completion(&evt->comp); 2307 2308 if (rsp_iu.cmd.status) 2309 rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); 2310 2311 if (rsp_code) { 2312 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2313 rsp_code = fc_rsp->data.info.rsp_code; 2314 2315 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2316 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, 2317 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2318 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, 2319 fc_rsp->scsi_status); 2320 rsp_rc = -EIO; 2321 } else 2322 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2323 2324 spin_lock_irqsave(vhost->host->host_lock, flags); 2325 ibmvfc_free_event(evt); 2326 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2327 return rsp_rc; 2328 } 2329 2330 /** 2331 * ibmvfc_match_rport - Match function for specified remote port 2332 * @evt: ibmvfc event struct 2333 * @rport: device to match 2334 * 2335 * Returns: 2336 * 1 if event matches rport / 0 if event does not match rport 2337 **/ 2338 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2339 { 2340 struct fc_rport *cmd_rport; 2341 2342 if (evt->cmnd) { 2343 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2344 if (cmd_rport == rport) 2345 return 1; 2346 } 2347 return 0; 2348 } 2349 2350 /** 2351 * ibmvfc_match_target - Match function for specified target 2352 * @evt: ibmvfc event struct 2353 * @device: device to match (starget) 2354 * 2355 * Returns: 2356 * 1 if event matches starget / 0 if event does not match starget 2357 **/ 2358 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2359 { 2360 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2361 return 1; 2362 return 0; 2363 } 2364 2365 /** 2366 * ibmvfc_match_lun - Match function for specified LUN 2367 * @evt: ibmvfc event struct 2368 * @device: device to match (sdev) 2369 * 2370 * Returns: 2371 * 1 if event matches sdev / 0 if event does not match sdev 2372 **/ 2373 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2374 { 2375 if (evt->cmnd && evt->cmnd->device == device) 2376 return 1; 2377 return 0; 2378 } 2379 2380 /** 2381 * ibmvfc_event_is_free - Check if event is free or not 2382 * @evt: ibmvfc event struct 2383 * 2384 * Returns: 2385 * true / false 2386 **/ 2387 static bool ibmvfc_event_is_free(struct ibmvfc_event *evt) 2388 { 2389 struct ibmvfc_event *loop_evt; 2390 2391 list_for_each_entry(loop_evt, &evt->queue->free, queue_list) 2392 if (loop_evt == evt) 2393 return true; 2394 2395 return false; 2396 } 2397 2398 /** 2399 * ibmvfc_wait_for_ops - Wait for ops to complete 2400 * @vhost: ibmvfc host struct 2401 * @device: device to match (starget or sdev) 2402 * @match: match function 2403 * 2404 * Returns: 2405 * SUCCESS / FAILED 2406 **/ 2407 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2408 int (*match) (struct ibmvfc_event *, void *)) 2409 { 2410 struct ibmvfc_event *evt; 2411 DECLARE_COMPLETION_ONSTACK(comp); 2412 int wait, i, q_index, q_size; 2413 unsigned long flags; 2414 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2415 struct ibmvfc_queue *queues; 2416 2417 ENTER; 2418 if (vhost->mq_enabled && vhost->using_channels) { 2419 queues = vhost->scsi_scrqs.scrqs; 2420 q_size = vhost->scsi_scrqs.active_queues; 2421 } else { 2422 queues = &vhost->crq; 2423 q_size = 1; 2424 } 2425 2426 do { 2427 wait = 0; 2428 spin_lock_irqsave(vhost->host->host_lock, flags); 2429 for (q_index = 0; q_index < q_size; q_index++) { 2430 spin_lock(&queues[q_index].l_lock); 2431 for (i = 0; i < queues[q_index].evt_pool.size; i++) { 2432 evt = &queues[q_index].evt_pool.events[i]; 2433 if (!ibmvfc_event_is_free(evt)) { 2434 if (match(evt, device)) { 2435 evt->eh_comp = ∁ 2436 wait++; 2437 } 2438 } 2439 } 2440 spin_unlock(&queues[q_index].l_lock); 2441 } 2442 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2443 2444 if (wait) { 2445 timeout = wait_for_completion_timeout(&comp, timeout); 2446 2447 if (!timeout) { 2448 wait = 0; 2449 spin_lock_irqsave(vhost->host->host_lock, flags); 2450 for (q_index = 0; q_index < q_size; q_index++) { 2451 spin_lock(&queues[q_index].l_lock); 2452 for (i = 0; i < queues[q_index].evt_pool.size; i++) { 2453 evt = &queues[q_index].evt_pool.events[i]; 2454 if (!ibmvfc_event_is_free(evt)) { 2455 if (match(evt, device)) { 2456 evt->eh_comp = NULL; 2457 wait++; 2458 } 2459 } 2460 } 2461 spin_unlock(&queues[q_index].l_lock); 2462 } 2463 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2464 if (wait) 2465 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2466 LEAVE; 2467 return wait ? FAILED : SUCCESS; 2468 } 2469 } 2470 } while (wait); 2471 2472 LEAVE; 2473 return SUCCESS; 2474 } 2475 2476 static struct ibmvfc_event *ibmvfc_init_tmf(struct ibmvfc_queue *queue, 2477 struct scsi_device *sdev, 2478 int type) 2479 { 2480 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2481 struct scsi_target *starget = scsi_target(sdev); 2482 struct fc_rport *rport = starget_to_rport(starget); 2483 struct ibmvfc_event *evt; 2484 struct ibmvfc_tmf *tmf; 2485 2486 evt = ibmvfc_get_event(queue); 2487 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2488 2489 tmf = &evt->iu.tmf; 2490 memset(tmf, 0, sizeof(*tmf)); 2491 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 2492 tmf->common.version = cpu_to_be32(2); 2493 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2494 } else { 2495 tmf->common.version = cpu_to_be32(1); 2496 } 2497 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2498 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2499 tmf->scsi_id = cpu_to_be64(rport->port_id); 2500 int_to_scsilun(sdev->lun, &tmf->lun); 2501 if (!ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPRESS_ABTS)) 2502 type &= ~IBMVFC_TMF_SUPPRESS_ABTS; 2503 if (vhost->state == IBMVFC_ACTIVE) 2504 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); 2505 else 2506 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); 2507 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2508 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); 2509 2510 init_completion(&evt->comp); 2511 2512 return evt; 2513 } 2514 2515 static int ibmvfc_cancel_all_mq(struct scsi_device *sdev, int type) 2516 { 2517 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2518 struct ibmvfc_event *evt, *found_evt, *temp; 2519 struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; 2520 unsigned long flags; 2521 int num_hwq, i; 2522 int fail = 0; 2523 LIST_HEAD(cancelq); 2524 u16 status; 2525 2526 ENTER; 2527 spin_lock_irqsave(vhost->host->host_lock, flags); 2528 num_hwq = vhost->scsi_scrqs.active_queues; 2529 for (i = 0; i < num_hwq; i++) { 2530 spin_lock(queues[i].q_lock); 2531 spin_lock(&queues[i].l_lock); 2532 found_evt = NULL; 2533 list_for_each_entry(evt, &queues[i].sent, queue_list) { 2534 if (evt->cmnd && evt->cmnd->device == sdev) { 2535 found_evt = evt; 2536 break; 2537 } 2538 } 2539 spin_unlock(&queues[i].l_lock); 2540 2541 if (found_evt && vhost->logged_in) { 2542 evt = ibmvfc_init_tmf(&queues[i], sdev, type); 2543 evt->sync_iu = &queues[i].cancel_rsp; 2544 ibmvfc_send_event(evt, vhost, default_timeout); 2545 list_add_tail(&evt->cancel, &cancelq); 2546 } 2547 2548 spin_unlock(queues[i].q_lock); 2549 } 2550 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2551 2552 if (list_empty(&cancelq)) { 2553 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2554 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2555 return 0; 2556 } 2557 2558 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2559 2560 list_for_each_entry_safe(evt, temp, &cancelq, cancel) { 2561 wait_for_completion(&evt->comp); 2562 status = be16_to_cpu(evt->queue->cancel_rsp.mad_common.status); 2563 list_del(&evt->cancel); 2564 ibmvfc_free_event(evt); 2565 2566 if (status != IBMVFC_MAD_SUCCESS) { 2567 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2568 switch (status) { 2569 case IBMVFC_MAD_DRIVER_FAILED: 2570 case IBMVFC_MAD_CRQ_ERROR: 2571 /* Host adapter most likely going through reset, return success to 2572 * the caller will wait for the command being cancelled to get returned 2573 */ 2574 break; 2575 default: 2576 fail = 1; 2577 break; 2578 } 2579 } 2580 } 2581 2582 if (fail) 2583 return -EIO; 2584 2585 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2586 LEAVE; 2587 return 0; 2588 } 2589 2590 static int ibmvfc_cancel_all_sq(struct scsi_device *sdev, int type) 2591 { 2592 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2593 struct ibmvfc_event *evt, *found_evt; 2594 union ibmvfc_iu rsp; 2595 int rsp_rc = -EBUSY; 2596 unsigned long flags; 2597 u16 status; 2598 2599 ENTER; 2600 found_evt = NULL; 2601 spin_lock_irqsave(vhost->host->host_lock, flags); 2602 spin_lock(&vhost->crq.l_lock); 2603 list_for_each_entry(evt, &vhost->crq.sent, queue_list) { 2604 if (evt->cmnd && evt->cmnd->device == sdev) { 2605 found_evt = evt; 2606 break; 2607 } 2608 } 2609 spin_unlock(&vhost->crq.l_lock); 2610 2611 if (!found_evt) { 2612 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2613 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2614 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2615 return 0; 2616 } 2617 2618 if (vhost->logged_in) { 2619 evt = ibmvfc_init_tmf(&vhost->crq, sdev, type); 2620 evt->sync_iu = &rsp; 2621 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2622 } 2623 2624 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2625 2626 if (rsp_rc != 0) { 2627 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2628 /* If failure is received, the host adapter is most likely going 2629 through reset, return success so the caller will wait for the command 2630 being cancelled to get returned */ 2631 return 0; 2632 } 2633 2634 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2635 2636 wait_for_completion(&evt->comp); 2637 status = be16_to_cpu(rsp.mad_common.status); 2638 spin_lock_irqsave(vhost->host->host_lock, flags); 2639 ibmvfc_free_event(evt); 2640 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2641 2642 if (status != IBMVFC_MAD_SUCCESS) { 2643 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2644 switch (status) { 2645 case IBMVFC_MAD_DRIVER_FAILED: 2646 case IBMVFC_MAD_CRQ_ERROR: 2647 /* Host adapter most likely going through reset, return success to 2648 the caller will wait for the command being cancelled to get returned */ 2649 return 0; 2650 default: 2651 return -EIO; 2652 }; 2653 } 2654 2655 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2656 return 0; 2657 } 2658 2659 /** 2660 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2661 * @sdev: scsi device to cancel commands 2662 * @type: type of error recovery being performed 2663 * 2664 * This sends a cancel to the VIOS for the specified device. This does 2665 * NOT send any abort to the actual device. That must be done separately. 2666 * 2667 * Returns: 2668 * 0 on success / other on failure 2669 **/ 2670 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2671 { 2672 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2673 2674 if (vhost->mq_enabled && vhost->using_channels) 2675 return ibmvfc_cancel_all_mq(sdev, type); 2676 else 2677 return ibmvfc_cancel_all_sq(sdev, type); 2678 } 2679 2680 /** 2681 * ibmvfc_match_key - Match function for specified cancel key 2682 * @evt: ibmvfc event struct 2683 * @key: cancel key to match 2684 * 2685 * Returns: 2686 * 1 if event matches key / 0 if event does not match key 2687 **/ 2688 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2689 { 2690 unsigned long cancel_key = (unsigned long)key; 2691 2692 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2693 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) 2694 return 1; 2695 return 0; 2696 } 2697 2698 /** 2699 * ibmvfc_match_evt - Match function for specified event 2700 * @evt: ibmvfc event struct 2701 * @match: event to match 2702 * 2703 * Returns: 2704 * 1 if event matches key / 0 if event does not match key 2705 **/ 2706 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) 2707 { 2708 if (evt == match) 2709 return 1; 2710 return 0; 2711 } 2712 2713 /** 2714 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2715 * @sdev: scsi device to abort commands 2716 * 2717 * This sends an Abort Task Set to the VIOS for the specified device. This does 2718 * NOT send any cancel to the VIOS. That must be done separately. 2719 * 2720 * Returns: 2721 * 0 on success / other on failure 2722 **/ 2723 static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2724 { 2725 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2726 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2727 struct ibmvfc_cmd *tmf; 2728 struct ibmvfc_event *evt, *found_evt; 2729 union ibmvfc_iu rsp_iu; 2730 struct ibmvfc_fcp_cmd_iu *iu; 2731 struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); 2732 int rc, rsp_rc = -EBUSY; 2733 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2734 int rsp_code = 0; 2735 2736 found_evt = NULL; 2737 spin_lock_irqsave(vhost->host->host_lock, flags); 2738 spin_lock(&vhost->crq.l_lock); 2739 list_for_each_entry(evt, &vhost->crq.sent, queue_list) { 2740 if (evt->cmnd && evt->cmnd->device == sdev) { 2741 found_evt = evt; 2742 break; 2743 } 2744 } 2745 spin_unlock(&vhost->crq.l_lock); 2746 2747 if (!found_evt) { 2748 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2749 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2750 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2751 return 0; 2752 } 2753 2754 if (vhost->state == IBMVFC_ACTIVE) { 2755 evt = ibmvfc_get_event(&vhost->crq); 2756 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2757 tmf = ibmvfc_init_vfc_cmd(evt, sdev); 2758 iu = ibmvfc_get_fcp_iu(vhost, tmf); 2759 2760 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 2761 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2762 iu->tmf_flags = IBMVFC_ABORT_TASK_SET; 2763 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2764 evt->sync_iu = &rsp_iu; 2765 2766 tmf->correlation = cpu_to_be64((u64)evt); 2767 2768 init_completion(&evt->comp); 2769 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2770 } 2771 2772 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2773 2774 if (rsp_rc != 0) { 2775 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2776 return -EIO; 2777 } 2778 2779 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2780 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2781 2782 if (!timeout) { 2783 rc = ibmvfc_cancel_all(sdev, 0); 2784 if (!rc) { 2785 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2786 if (rc == SUCCESS) 2787 rc = 0; 2788 } 2789 2790 if (rc) { 2791 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2792 ibmvfc_reset_host(vhost); 2793 rsp_rc = -EIO; 2794 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2795 2796 if (rc == SUCCESS) 2797 rsp_rc = 0; 2798 2799 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); 2800 if (rc != SUCCESS) { 2801 spin_lock_irqsave(vhost->host->host_lock, flags); 2802 ibmvfc_hard_reset_host(vhost); 2803 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2804 rsp_rc = 0; 2805 } 2806 2807 goto out; 2808 } 2809 } 2810 2811 if (rsp_iu.cmd.status) 2812 rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); 2813 2814 if (rsp_code) { 2815 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2816 rsp_code = fc_rsp->data.info.rsp_code; 2817 2818 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2819 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2820 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2821 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, 2822 fc_rsp->scsi_status); 2823 rsp_rc = -EIO; 2824 } else 2825 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2826 2827 out: 2828 spin_lock_irqsave(vhost->host->host_lock, flags); 2829 ibmvfc_free_event(evt); 2830 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2831 return rsp_rc; 2832 } 2833 2834 /** 2835 * ibmvfc_eh_abort_handler - Abort a command 2836 * @cmd: scsi command to abort 2837 * 2838 * Returns: 2839 * SUCCESS / FAST_IO_FAIL / FAILED 2840 **/ 2841 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2842 { 2843 struct scsi_device *sdev = cmd->device; 2844 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2845 int cancel_rc, block_rc; 2846 int rc = FAILED; 2847 2848 ENTER; 2849 block_rc = fc_block_scsi_eh(cmd); 2850 ibmvfc_wait_while_resetting(vhost); 2851 if (block_rc != FAST_IO_FAIL) { 2852 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2853 ibmvfc_abort_task_set(sdev); 2854 } else 2855 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2856 2857 if (!cancel_rc) 2858 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2859 2860 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2861 rc = FAST_IO_FAIL; 2862 2863 LEAVE; 2864 return rc; 2865 } 2866 2867 /** 2868 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2869 * @cmd: scsi command struct 2870 * 2871 * Returns: 2872 * SUCCESS / FAST_IO_FAIL / FAILED 2873 **/ 2874 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2875 { 2876 struct scsi_device *sdev = cmd->device; 2877 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2878 int cancel_rc, block_rc, reset_rc = 0; 2879 int rc = FAILED; 2880 2881 ENTER; 2882 block_rc = fc_block_scsi_eh(cmd); 2883 ibmvfc_wait_while_resetting(vhost); 2884 if (block_rc != FAST_IO_FAIL) { 2885 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2886 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2887 } else 2888 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2889 2890 if (!cancel_rc && !reset_rc) 2891 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2892 2893 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2894 rc = FAST_IO_FAIL; 2895 2896 LEAVE; 2897 return rc; 2898 } 2899 2900 /** 2901 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function 2902 * @sdev: scsi device struct 2903 * @data: return code 2904 * 2905 **/ 2906 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) 2907 { 2908 unsigned long *rc = data; 2909 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2910 } 2911 2912 /** 2913 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2914 * @sdev: scsi device struct 2915 * @data: return code 2916 * 2917 **/ 2918 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2919 { 2920 unsigned long *rc = data; 2921 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2922 } 2923 2924 /** 2925 * ibmvfc_eh_target_reset_handler - Reset the target 2926 * @cmd: scsi command struct 2927 * 2928 * Returns: 2929 * SUCCESS / FAST_IO_FAIL / FAILED 2930 **/ 2931 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2932 { 2933 struct scsi_device *sdev = cmd->device; 2934 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2935 struct scsi_target *starget = scsi_target(sdev); 2936 int block_rc; 2937 int reset_rc = 0; 2938 int rc = FAILED; 2939 unsigned long cancel_rc = 0; 2940 2941 ENTER; 2942 block_rc = fc_block_scsi_eh(cmd); 2943 ibmvfc_wait_while_resetting(vhost); 2944 if (block_rc != FAST_IO_FAIL) { 2945 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2946 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2947 } else 2948 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); 2949 2950 if (!cancel_rc && !reset_rc) 2951 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2952 2953 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2954 rc = FAST_IO_FAIL; 2955 2956 LEAVE; 2957 return rc; 2958 } 2959 2960 /** 2961 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2962 * @cmd: struct scsi_cmnd having problems 2963 * 2964 **/ 2965 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2966 { 2967 int rc; 2968 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2969 2970 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2971 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2972 2973 return rc ? FAILED : SUCCESS; 2974 } 2975 2976 /** 2977 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2978 * @rport: rport struct 2979 * 2980 * Return value: 2981 * none 2982 **/ 2983 static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2984 { 2985 struct Scsi_Host *shost = rport_to_shost(rport); 2986 struct ibmvfc_host *vhost = shost_priv(shost); 2987 struct fc_rport *dev_rport; 2988 struct scsi_device *sdev; 2989 struct ibmvfc_target *tgt; 2990 unsigned long rc, flags; 2991 unsigned int found; 2992 2993 ENTER; 2994 shost_for_each_device(sdev, shost) { 2995 dev_rport = starget_to_rport(scsi_target(sdev)); 2996 if (dev_rport != rport) 2997 continue; 2998 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2999 } 3000 3001 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 3002 3003 if (rc == FAILED) 3004 ibmvfc_issue_fc_host_lip(shost); 3005 3006 spin_lock_irqsave(shost->host_lock, flags); 3007 found = 0; 3008 list_for_each_entry(tgt, &vhost->targets, queue) { 3009 if (tgt->scsi_id == rport->port_id) { 3010 found++; 3011 break; 3012 } 3013 } 3014 3015 if (found && tgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 3016 /* 3017 * If we get here, that means we previously attempted to send 3018 * an implicit logout to the target but it failed, most likely 3019 * due to I/O being pending, so we need to send it again 3020 */ 3021 ibmvfc_del_tgt(tgt); 3022 ibmvfc_reinit_host(vhost); 3023 } 3024 3025 spin_unlock_irqrestore(shost->host_lock, flags); 3026 LEAVE; 3027 } 3028 3029 static const struct ibmvfc_async_desc ae_desc [] = { 3030 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3031 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3032 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3033 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3034 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3035 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, 3036 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, 3037 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, 3038 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, 3039 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, 3040 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, 3041 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, 3042 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, 3043 }; 3044 3045 static const struct ibmvfc_async_desc unknown_ae = { 3046 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL 3047 }; 3048 3049 /** 3050 * ibmvfc_get_ae_desc - Get text description for async event 3051 * @ae: async event 3052 * 3053 **/ 3054 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 3055 { 3056 int i; 3057 3058 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 3059 if (ae_desc[i].ae == ae) 3060 return &ae_desc[i]; 3061 3062 return &unknown_ae; 3063 } 3064 3065 static const struct { 3066 enum ibmvfc_ae_link_state state; 3067 const char *desc; 3068 } link_desc [] = { 3069 { IBMVFC_AE_LS_LINK_UP, " link up" }, 3070 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 3071 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 3072 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 3073 }; 3074 3075 /** 3076 * ibmvfc_get_link_state - Get text description for link state 3077 * @state: link state 3078 * 3079 **/ 3080 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 3081 { 3082 int i; 3083 3084 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 3085 if (link_desc[i].state == state) 3086 return link_desc[i].desc; 3087 3088 return ""; 3089 } 3090 3091 /** 3092 * ibmvfc_handle_async - Handle an async event from the adapter 3093 * @crq: crq to process 3094 * @vhost: ibmvfc host struct 3095 * 3096 **/ 3097 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 3098 struct ibmvfc_host *vhost) 3099 { 3100 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); 3101 struct ibmvfc_target *tgt; 3102 3103 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 3104 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id), 3105 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name), 3106 ibmvfc_get_link_state(crq->link_state)); 3107 3108 switch (be64_to_cpu(crq->event)) { 3109 case IBMVFC_AE_RESUME: 3110 switch (crq->link_state) { 3111 case IBMVFC_AE_LS_LINK_DOWN: 3112 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3113 break; 3114 case IBMVFC_AE_LS_LINK_DEAD: 3115 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3116 break; 3117 case IBMVFC_AE_LS_LINK_UP: 3118 case IBMVFC_AE_LS_LINK_BOUNCED: 3119 default: 3120 vhost->events_to_log |= IBMVFC_AE_LINKUP; 3121 vhost->delay_init = 1; 3122 __ibmvfc_reset_host(vhost); 3123 break; 3124 } 3125 3126 break; 3127 case IBMVFC_AE_LINK_UP: 3128 vhost->events_to_log |= IBMVFC_AE_LINKUP; 3129 vhost->delay_init = 1; 3130 __ibmvfc_reset_host(vhost); 3131 break; 3132 case IBMVFC_AE_SCN_FABRIC: 3133 case IBMVFC_AE_SCN_DOMAIN: 3134 vhost->events_to_log |= IBMVFC_AE_RSCN; 3135 if (vhost->state < IBMVFC_HALTED) { 3136 vhost->delay_init = 1; 3137 __ibmvfc_reset_host(vhost); 3138 } 3139 break; 3140 case IBMVFC_AE_SCN_NPORT: 3141 case IBMVFC_AE_SCN_GROUP: 3142 vhost->events_to_log |= IBMVFC_AE_RSCN; 3143 ibmvfc_reinit_host(vhost); 3144 break; 3145 case IBMVFC_AE_ELS_LOGO: 3146 case IBMVFC_AE_ELS_PRLO: 3147 case IBMVFC_AE_ELS_PLOGI: 3148 list_for_each_entry(tgt, &vhost->targets, queue) { 3149 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 3150 break; 3151 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) 3152 continue; 3153 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) 3154 continue; 3155 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) 3156 continue; 3157 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) 3158 tgt->logo_rcvd = 1; 3159 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { 3160 ibmvfc_del_tgt(tgt); 3161 ibmvfc_reinit_host(vhost); 3162 } 3163 } 3164 break; 3165 case IBMVFC_AE_LINK_DOWN: 3166 case IBMVFC_AE_ADAPTER_FAILED: 3167 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3168 break; 3169 case IBMVFC_AE_LINK_DEAD: 3170 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3171 break; 3172 case IBMVFC_AE_HALT: 3173 ibmvfc_link_down(vhost, IBMVFC_HALTED); 3174 break; 3175 default: 3176 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 3177 break; 3178 } 3179 } 3180 3181 /** 3182 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 3183 * @crq: Command/Response queue 3184 * @vhost: ibmvfc host struct 3185 * @evt_doneq: Event done queue 3186 * 3187 **/ 3188 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost, 3189 struct list_head *evt_doneq) 3190 { 3191 long rc; 3192 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 3193 3194 switch (crq->valid) { 3195 case IBMVFC_CRQ_INIT_RSP: 3196 switch (crq->format) { 3197 case IBMVFC_CRQ_INIT: 3198 dev_info(vhost->dev, "Partner initialized\n"); 3199 /* Send back a response */ 3200 rc = ibmvfc_send_crq_init_complete(vhost); 3201 if (rc == 0) 3202 ibmvfc_init_host(vhost); 3203 else 3204 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 3205 break; 3206 case IBMVFC_CRQ_INIT_COMPLETE: 3207 dev_info(vhost->dev, "Partner initialization complete\n"); 3208 ibmvfc_init_host(vhost); 3209 break; 3210 default: 3211 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 3212 } 3213 return; 3214 case IBMVFC_CRQ_XPORT_EVENT: 3215 vhost->state = IBMVFC_NO_CRQ; 3216 vhost->logged_in = 0; 3217 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3218 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 3219 /* We need to re-setup the interpartition connection */ 3220 dev_info(vhost->dev, "Partition migrated, Re-enabling adapter\n"); 3221 vhost->client_migrated = 1; 3222 ibmvfc_purge_requests(vhost, DID_REQUEUE); 3223 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3224 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 3225 } else if (crq->format == IBMVFC_PARTNER_FAILED || crq->format == IBMVFC_PARTNER_DEREGISTER) { 3226 dev_err(vhost->dev, "Host partner adapter deregistered or failed (rc=%d)\n", crq->format); 3227 ibmvfc_purge_requests(vhost, DID_ERROR); 3228 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3229 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 3230 } else { 3231 dev_err(vhost->dev, "Received unknown transport event from partner (rc=%d)\n", crq->format); 3232 } 3233 return; 3234 case IBMVFC_CRQ_CMD_RSP: 3235 break; 3236 default: 3237 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 3238 return; 3239 } 3240 3241 if (crq->format == IBMVFC_ASYNC_EVENT) 3242 return; 3243 3244 /* The only kind of payload CRQs we should get are responses to 3245 * things we send. Make sure this response is to something we 3246 * actually sent 3247 */ 3248 if (unlikely(!ibmvfc_valid_event(&vhost->crq.evt_pool, evt))) { 3249 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 3250 crq->ioba); 3251 return; 3252 } 3253 3254 if (unlikely(atomic_read(&evt->free))) { 3255 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 3256 crq->ioba); 3257 return; 3258 } 3259 3260 spin_lock(&evt->queue->l_lock); 3261 list_move_tail(&evt->queue_list, evt_doneq); 3262 spin_unlock(&evt->queue->l_lock); 3263 } 3264 3265 /** 3266 * ibmvfc_scan_finished - Check if the device scan is done. 3267 * @shost: scsi host struct 3268 * @time: current elapsed time 3269 * 3270 * Returns: 3271 * 0 if scan is not done / 1 if scan is done 3272 **/ 3273 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 3274 { 3275 unsigned long flags; 3276 struct ibmvfc_host *vhost = shost_priv(shost); 3277 int done = 0; 3278 3279 spin_lock_irqsave(shost->host_lock, flags); 3280 if (time >= (init_timeout * HZ)) { 3281 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 3282 "continuing initialization\n", init_timeout); 3283 done = 1; 3284 } 3285 3286 if (vhost->scan_complete) 3287 done = 1; 3288 spin_unlock_irqrestore(shost->host_lock, flags); 3289 return done; 3290 } 3291 3292 /** 3293 * ibmvfc_slave_alloc - Setup the device's task set value 3294 * @sdev: struct scsi_device device to configure 3295 * 3296 * Set the device's task set value so that error handling works as 3297 * expected. 3298 * 3299 * Returns: 3300 * 0 on success / -ENXIO if device does not exist 3301 **/ 3302 static int ibmvfc_slave_alloc(struct scsi_device *sdev) 3303 { 3304 struct Scsi_Host *shost = sdev->host; 3305 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 3306 struct ibmvfc_host *vhost = shost_priv(shost); 3307 unsigned long flags = 0; 3308 3309 if (!rport || fc_remote_port_chkready(rport)) 3310 return -ENXIO; 3311 3312 spin_lock_irqsave(shost->host_lock, flags); 3313 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 3314 spin_unlock_irqrestore(shost->host_lock, flags); 3315 return 0; 3316 } 3317 3318 /** 3319 * ibmvfc_target_alloc - Setup the target's task set value 3320 * @starget: struct scsi_target 3321 * 3322 * Set the target's task set value so that error handling works as 3323 * expected. 3324 * 3325 * Returns: 3326 * 0 on success / -ENXIO if device does not exist 3327 **/ 3328 static int ibmvfc_target_alloc(struct scsi_target *starget) 3329 { 3330 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 3331 struct ibmvfc_host *vhost = shost_priv(shost); 3332 unsigned long flags = 0; 3333 3334 spin_lock_irqsave(shost->host_lock, flags); 3335 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 3336 spin_unlock_irqrestore(shost->host_lock, flags); 3337 return 0; 3338 } 3339 3340 /** 3341 * ibmvfc_slave_configure - Configure the device 3342 * @sdev: struct scsi_device device to configure 3343 * 3344 * Enable allow_restart for a device if it is a disk. Adjust the 3345 * queue_depth here also. 3346 * 3347 * Returns: 3348 * 0 3349 **/ 3350 static int ibmvfc_slave_configure(struct scsi_device *sdev) 3351 { 3352 struct Scsi_Host *shost = sdev->host; 3353 unsigned long flags = 0; 3354 3355 spin_lock_irqsave(shost->host_lock, flags); 3356 if (sdev->type == TYPE_DISK) { 3357 sdev->allow_restart = 1; 3358 blk_queue_rq_timeout(sdev->request_queue, 120 * HZ); 3359 } 3360 spin_unlock_irqrestore(shost->host_lock, flags); 3361 return 0; 3362 } 3363 3364 /** 3365 * ibmvfc_change_queue_depth - Change the device's queue depth 3366 * @sdev: scsi device struct 3367 * @qdepth: depth to set 3368 * 3369 * Return value: 3370 * actual depth set 3371 **/ 3372 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 3373 { 3374 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 3375 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 3376 3377 return scsi_change_queue_depth(sdev, qdepth); 3378 } 3379 3380 static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 3381 struct device_attribute *attr, char *buf) 3382 { 3383 struct Scsi_Host *shost = class_to_shost(dev); 3384 struct ibmvfc_host *vhost = shost_priv(shost); 3385 3386 return snprintf(buf, PAGE_SIZE, "%s\n", 3387 vhost->login_buf->resp.partition_name); 3388 } 3389 3390 static ssize_t ibmvfc_show_host_device_name(struct device *dev, 3391 struct device_attribute *attr, char *buf) 3392 { 3393 struct Scsi_Host *shost = class_to_shost(dev); 3394 struct ibmvfc_host *vhost = shost_priv(shost); 3395 3396 return snprintf(buf, PAGE_SIZE, "%s\n", 3397 vhost->login_buf->resp.device_name); 3398 } 3399 3400 static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 3401 struct device_attribute *attr, char *buf) 3402 { 3403 struct Scsi_Host *shost = class_to_shost(dev); 3404 struct ibmvfc_host *vhost = shost_priv(shost); 3405 3406 return snprintf(buf, PAGE_SIZE, "%s\n", 3407 vhost->login_buf->resp.port_loc_code); 3408 } 3409 3410 static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 3411 struct device_attribute *attr, char *buf) 3412 { 3413 struct Scsi_Host *shost = class_to_shost(dev); 3414 struct ibmvfc_host *vhost = shost_priv(shost); 3415 3416 return snprintf(buf, PAGE_SIZE, "%s\n", 3417 vhost->login_buf->resp.drc_name); 3418 } 3419 3420 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 3421 struct device_attribute *attr, char *buf) 3422 { 3423 struct Scsi_Host *shost = class_to_shost(dev); 3424 struct ibmvfc_host *vhost = shost_priv(shost); 3425 return snprintf(buf, PAGE_SIZE, "%d\n", be32_to_cpu(vhost->login_buf->resp.version)); 3426 } 3427 3428 static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 3429 struct device_attribute *attr, char *buf) 3430 { 3431 struct Scsi_Host *shost = class_to_shost(dev); 3432 struct ibmvfc_host *vhost = shost_priv(shost); 3433 return snprintf(buf, PAGE_SIZE, "%llx\n", be64_to_cpu(vhost->login_buf->resp.capabilities)); 3434 } 3435 3436 /** 3437 * ibmvfc_show_log_level - Show the adapter's error logging level 3438 * @dev: class device struct 3439 * @attr: unused 3440 * @buf: buffer 3441 * 3442 * Return value: 3443 * number of bytes printed to buffer 3444 **/ 3445 static ssize_t ibmvfc_show_log_level(struct device *dev, 3446 struct device_attribute *attr, char *buf) 3447 { 3448 struct Scsi_Host *shost = class_to_shost(dev); 3449 struct ibmvfc_host *vhost = shost_priv(shost); 3450 unsigned long flags = 0; 3451 int len; 3452 3453 spin_lock_irqsave(shost->host_lock, flags); 3454 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 3455 spin_unlock_irqrestore(shost->host_lock, flags); 3456 return len; 3457 } 3458 3459 /** 3460 * ibmvfc_store_log_level - Change the adapter's error logging level 3461 * @dev: class device struct 3462 * @attr: unused 3463 * @buf: buffer 3464 * @count: buffer size 3465 * 3466 * Return value: 3467 * number of bytes printed to buffer 3468 **/ 3469 static ssize_t ibmvfc_store_log_level(struct device *dev, 3470 struct device_attribute *attr, 3471 const char *buf, size_t count) 3472 { 3473 struct Scsi_Host *shost = class_to_shost(dev); 3474 struct ibmvfc_host *vhost = shost_priv(shost); 3475 unsigned long flags = 0; 3476 3477 spin_lock_irqsave(shost->host_lock, flags); 3478 vhost->log_level = simple_strtoul(buf, NULL, 10); 3479 spin_unlock_irqrestore(shost->host_lock, flags); 3480 return strlen(buf); 3481 } 3482 3483 static ssize_t ibmvfc_show_scsi_channels(struct device *dev, 3484 struct device_attribute *attr, char *buf) 3485 { 3486 struct Scsi_Host *shost = class_to_shost(dev); 3487 struct ibmvfc_host *vhost = shost_priv(shost); 3488 unsigned long flags = 0; 3489 int len; 3490 3491 spin_lock_irqsave(shost->host_lock, flags); 3492 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->client_scsi_channels); 3493 spin_unlock_irqrestore(shost->host_lock, flags); 3494 return len; 3495 } 3496 3497 static ssize_t ibmvfc_store_scsi_channels(struct device *dev, 3498 struct device_attribute *attr, 3499 const char *buf, size_t count) 3500 { 3501 struct Scsi_Host *shost = class_to_shost(dev); 3502 struct ibmvfc_host *vhost = shost_priv(shost); 3503 unsigned long flags = 0; 3504 unsigned int channels; 3505 3506 spin_lock_irqsave(shost->host_lock, flags); 3507 channels = simple_strtoul(buf, NULL, 10); 3508 vhost->client_scsi_channels = min(channels, nr_scsi_hw_queues); 3509 ibmvfc_hard_reset_host(vhost); 3510 spin_unlock_irqrestore(shost->host_lock, flags); 3511 return strlen(buf); 3512 } 3513 3514 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 3515 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 3516 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 3517 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 3518 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 3519 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 3520 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 3521 ibmvfc_show_log_level, ibmvfc_store_log_level); 3522 static DEVICE_ATTR(nr_scsi_channels, S_IRUGO | S_IWUSR, 3523 ibmvfc_show_scsi_channels, ibmvfc_store_scsi_channels); 3524 3525 #ifdef CONFIG_SCSI_IBMVFC_TRACE 3526 /** 3527 * ibmvfc_read_trace - Dump the adapter trace 3528 * @filp: open sysfs file 3529 * @kobj: kobject struct 3530 * @bin_attr: bin_attribute struct 3531 * @buf: buffer 3532 * @off: offset 3533 * @count: buffer size 3534 * 3535 * Return value: 3536 * number of bytes printed to buffer 3537 **/ 3538 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 3539 struct bin_attribute *bin_attr, 3540 char *buf, loff_t off, size_t count) 3541 { 3542 struct device *dev = kobj_to_dev(kobj); 3543 struct Scsi_Host *shost = class_to_shost(dev); 3544 struct ibmvfc_host *vhost = shost_priv(shost); 3545 unsigned long flags = 0; 3546 int size = IBMVFC_TRACE_SIZE; 3547 char *src = (char *)vhost->trace; 3548 3549 if (off > size) 3550 return 0; 3551 if (off + count > size) { 3552 size -= off; 3553 count = size; 3554 } 3555 3556 spin_lock_irqsave(shost->host_lock, flags); 3557 memcpy(buf, &src[off], count); 3558 spin_unlock_irqrestore(shost->host_lock, flags); 3559 return count; 3560 } 3561 3562 static struct bin_attribute ibmvfc_trace_attr = { 3563 .attr = { 3564 .name = "trace", 3565 .mode = S_IRUGO, 3566 }, 3567 .size = 0, 3568 .read = ibmvfc_read_trace, 3569 }; 3570 #endif 3571 3572 static struct device_attribute *ibmvfc_attrs[] = { 3573 &dev_attr_partition_name, 3574 &dev_attr_device_name, 3575 &dev_attr_port_loc_code, 3576 &dev_attr_drc_name, 3577 &dev_attr_npiv_version, 3578 &dev_attr_capabilities, 3579 &dev_attr_log_level, 3580 &dev_attr_nr_scsi_channels, 3581 NULL 3582 }; 3583 3584 static struct scsi_host_template driver_template = { 3585 .module = THIS_MODULE, 3586 .name = "IBM POWER Virtual FC Adapter", 3587 .proc_name = IBMVFC_NAME, 3588 .queuecommand = ibmvfc_queuecommand, 3589 .eh_timed_out = fc_eh_timed_out, 3590 .eh_abort_handler = ibmvfc_eh_abort_handler, 3591 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3592 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3593 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3594 .slave_alloc = ibmvfc_slave_alloc, 3595 .slave_configure = ibmvfc_slave_configure, 3596 .target_alloc = ibmvfc_target_alloc, 3597 .scan_finished = ibmvfc_scan_finished, 3598 .change_queue_depth = ibmvfc_change_queue_depth, 3599 .cmd_per_lun = 16, 3600 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3601 .this_id = -1, 3602 .sg_tablesize = SG_ALL, 3603 .max_sectors = IBMVFC_MAX_SECTORS, 3604 .shost_attrs = ibmvfc_attrs, 3605 .track_queue_depth = 1, 3606 .host_tagset = 1, 3607 }; 3608 3609 /** 3610 * ibmvfc_next_async_crq - Returns the next entry in async queue 3611 * @vhost: ibmvfc host struct 3612 * 3613 * Returns: 3614 * Pointer to next entry in queue / NULL if empty 3615 **/ 3616 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3617 { 3618 struct ibmvfc_queue *async_crq = &vhost->async_crq; 3619 struct ibmvfc_async_crq *crq; 3620 3621 crq = &async_crq->msgs.async[async_crq->cur]; 3622 if (crq->valid & 0x80) { 3623 if (++async_crq->cur == async_crq->size) 3624 async_crq->cur = 0; 3625 rmb(); 3626 } else 3627 crq = NULL; 3628 3629 return crq; 3630 } 3631 3632 /** 3633 * ibmvfc_next_crq - Returns the next entry in message queue 3634 * @vhost: ibmvfc host struct 3635 * 3636 * Returns: 3637 * Pointer to next entry in queue / NULL if empty 3638 **/ 3639 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3640 { 3641 struct ibmvfc_queue *queue = &vhost->crq; 3642 struct ibmvfc_crq *crq; 3643 3644 crq = &queue->msgs.crq[queue->cur]; 3645 if (crq->valid & 0x80) { 3646 if (++queue->cur == queue->size) 3647 queue->cur = 0; 3648 rmb(); 3649 } else 3650 crq = NULL; 3651 3652 return crq; 3653 } 3654 3655 /** 3656 * ibmvfc_interrupt - Interrupt handler 3657 * @irq: number of irq to handle, not used 3658 * @dev_instance: ibmvfc_host that received interrupt 3659 * 3660 * Returns: 3661 * IRQ_HANDLED 3662 **/ 3663 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3664 { 3665 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3666 unsigned long flags; 3667 3668 spin_lock_irqsave(vhost->host->host_lock, flags); 3669 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3670 tasklet_schedule(&vhost->tasklet); 3671 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3672 return IRQ_HANDLED; 3673 } 3674 3675 /** 3676 * ibmvfc_tasklet - Interrupt handler tasklet 3677 * @data: ibmvfc host struct 3678 * 3679 * Returns: 3680 * Nothing 3681 **/ 3682 static void ibmvfc_tasklet(void *data) 3683 { 3684 struct ibmvfc_host *vhost = data; 3685 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3686 struct ibmvfc_crq *crq; 3687 struct ibmvfc_async_crq *async; 3688 struct ibmvfc_event *evt, *temp; 3689 unsigned long flags; 3690 int done = 0; 3691 LIST_HEAD(evt_doneq); 3692 3693 spin_lock_irqsave(vhost->host->host_lock, flags); 3694 spin_lock(vhost->crq.q_lock); 3695 while (!done) { 3696 /* Pull all the valid messages off the async CRQ */ 3697 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3698 ibmvfc_handle_async(async, vhost); 3699 async->valid = 0; 3700 wmb(); 3701 } 3702 3703 /* Pull all the valid messages off the CRQ */ 3704 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3705 ibmvfc_handle_crq(crq, vhost, &evt_doneq); 3706 crq->valid = 0; 3707 wmb(); 3708 } 3709 3710 vio_enable_interrupts(vdev); 3711 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3712 vio_disable_interrupts(vdev); 3713 ibmvfc_handle_async(async, vhost); 3714 async->valid = 0; 3715 wmb(); 3716 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3717 vio_disable_interrupts(vdev); 3718 ibmvfc_handle_crq(crq, vhost, &evt_doneq); 3719 crq->valid = 0; 3720 wmb(); 3721 } else 3722 done = 1; 3723 } 3724 3725 spin_unlock(vhost->crq.q_lock); 3726 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3727 3728 list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) { 3729 del_timer(&evt->timer); 3730 list_del(&evt->queue_list); 3731 ibmvfc_trc_end(evt); 3732 evt->done(evt); 3733 } 3734 } 3735 3736 static int ibmvfc_toggle_scrq_irq(struct ibmvfc_queue *scrq, int enable) 3737 { 3738 struct device *dev = scrq->vhost->dev; 3739 struct vio_dev *vdev = to_vio_dev(dev); 3740 unsigned long rc; 3741 int irq_action = H_ENABLE_VIO_INTERRUPT; 3742 3743 if (!enable) 3744 irq_action = H_DISABLE_VIO_INTERRUPT; 3745 3746 rc = plpar_hcall_norets(H_VIOCTL, vdev->unit_address, irq_action, 3747 scrq->hw_irq, 0, 0); 3748 3749 if (rc) 3750 dev_err(dev, "Couldn't %s sub-crq[%lu] irq. rc=%ld\n", 3751 enable ? "enable" : "disable", scrq->hwq_id, rc); 3752 3753 return rc; 3754 } 3755 3756 static void ibmvfc_handle_scrq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost, 3757 struct list_head *evt_doneq) 3758 { 3759 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 3760 3761 switch (crq->valid) { 3762 case IBMVFC_CRQ_CMD_RSP: 3763 break; 3764 case IBMVFC_CRQ_XPORT_EVENT: 3765 return; 3766 default: 3767 dev_err(vhost->dev, "Got and invalid message type 0x%02x\n", crq->valid); 3768 return; 3769 } 3770 3771 /* The only kind of payload CRQs we should get are responses to 3772 * things we send. Make sure this response is to something we 3773 * actually sent 3774 */ 3775 if (unlikely(!ibmvfc_valid_event(&evt->queue->evt_pool, evt))) { 3776 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 3777 crq->ioba); 3778 return; 3779 } 3780 3781 if (unlikely(atomic_read(&evt->free))) { 3782 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 3783 crq->ioba); 3784 return; 3785 } 3786 3787 spin_lock(&evt->queue->l_lock); 3788 list_move_tail(&evt->queue_list, evt_doneq); 3789 spin_unlock(&evt->queue->l_lock); 3790 } 3791 3792 static struct ibmvfc_crq *ibmvfc_next_scrq(struct ibmvfc_queue *scrq) 3793 { 3794 struct ibmvfc_crq *crq; 3795 3796 crq = &scrq->msgs.scrq[scrq->cur].crq; 3797 if (crq->valid & 0x80) { 3798 if (++scrq->cur == scrq->size) 3799 scrq->cur = 0; 3800 rmb(); 3801 } else 3802 crq = NULL; 3803 3804 return crq; 3805 } 3806 3807 static void ibmvfc_drain_sub_crq(struct ibmvfc_queue *scrq) 3808 { 3809 struct ibmvfc_crq *crq; 3810 struct ibmvfc_event *evt, *temp; 3811 unsigned long flags; 3812 int done = 0; 3813 LIST_HEAD(evt_doneq); 3814 3815 spin_lock_irqsave(scrq->q_lock, flags); 3816 while (!done) { 3817 while ((crq = ibmvfc_next_scrq(scrq)) != NULL) { 3818 ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq); 3819 crq->valid = 0; 3820 wmb(); 3821 } 3822 3823 ibmvfc_toggle_scrq_irq(scrq, 1); 3824 if ((crq = ibmvfc_next_scrq(scrq)) != NULL) { 3825 ibmvfc_toggle_scrq_irq(scrq, 0); 3826 ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq); 3827 crq->valid = 0; 3828 wmb(); 3829 } else 3830 done = 1; 3831 } 3832 spin_unlock_irqrestore(scrq->q_lock, flags); 3833 3834 list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) { 3835 del_timer(&evt->timer); 3836 list_del(&evt->queue_list); 3837 ibmvfc_trc_end(evt); 3838 evt->done(evt); 3839 } 3840 } 3841 3842 static irqreturn_t ibmvfc_interrupt_scsi(int irq, void *scrq_instance) 3843 { 3844 struct ibmvfc_queue *scrq = (struct ibmvfc_queue *)scrq_instance; 3845 3846 ibmvfc_toggle_scrq_irq(scrq, 0); 3847 ibmvfc_drain_sub_crq(scrq); 3848 3849 return IRQ_HANDLED; 3850 } 3851 3852 /** 3853 * ibmvfc_init_tgt - Set the next init job step for the target 3854 * @tgt: ibmvfc target struct 3855 * @job_step: job step to perform 3856 * 3857 **/ 3858 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3859 void (*job_step) (struct ibmvfc_target *)) 3860 { 3861 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT)) 3862 tgt->job_step = job_step; 3863 wake_up(&tgt->vhost->work_wait_q); 3864 } 3865 3866 /** 3867 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3868 * @tgt: ibmvfc target struct 3869 * @job_step: initialization job step 3870 * 3871 * Returns: 1 if step will be retried / 0 if not 3872 * 3873 **/ 3874 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3875 void (*job_step) (struct ibmvfc_target *)) 3876 { 3877 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3878 ibmvfc_del_tgt(tgt); 3879 wake_up(&tgt->vhost->work_wait_q); 3880 return 0; 3881 } else 3882 ibmvfc_init_tgt(tgt, job_step); 3883 return 1; 3884 } 3885 3886 /* Defined in FC-LS */ 3887 static const struct { 3888 int code; 3889 int retry; 3890 int logged_in; 3891 } prli_rsp [] = { 3892 { 0, 1, 0 }, 3893 { 1, 0, 1 }, 3894 { 2, 1, 0 }, 3895 { 3, 1, 0 }, 3896 { 4, 0, 0 }, 3897 { 5, 0, 0 }, 3898 { 6, 0, 1 }, 3899 { 7, 0, 0 }, 3900 { 8, 1, 0 }, 3901 }; 3902 3903 /** 3904 * ibmvfc_get_prli_rsp - Find PRLI response index 3905 * @flags: PRLI response flags 3906 * 3907 **/ 3908 static int ibmvfc_get_prli_rsp(u16 flags) 3909 { 3910 int i; 3911 int code = (flags & 0x0f00) >> 8; 3912 3913 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3914 if (prli_rsp[i].code == code) 3915 return i; 3916 3917 return 0; 3918 } 3919 3920 /** 3921 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3922 * @evt: ibmvfc event struct 3923 * 3924 **/ 3925 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3926 { 3927 struct ibmvfc_target *tgt = evt->tgt; 3928 struct ibmvfc_host *vhost = evt->vhost; 3929 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3930 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3931 u32 status = be16_to_cpu(rsp->common.status); 3932 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3933 3934 vhost->discovery_threads--; 3935 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3936 switch (status) { 3937 case IBMVFC_MAD_SUCCESS: 3938 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3939 parms->type, parms->flags, parms->service_parms); 3940 3941 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3942 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); 3943 if (prli_rsp[index].logged_in) { 3944 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { 3945 tgt->need_login = 0; 3946 tgt->ids.roles = 0; 3947 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) 3948 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3949 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) 3950 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3951 tgt->add_rport = 1; 3952 } else 3953 ibmvfc_del_tgt(tgt); 3954 } else if (prli_rsp[index].retry) 3955 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3956 else 3957 ibmvfc_del_tgt(tgt); 3958 } else 3959 ibmvfc_del_tgt(tgt); 3960 break; 3961 case IBMVFC_MAD_DRIVER_FAILED: 3962 break; 3963 case IBMVFC_MAD_CRQ_ERROR: 3964 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3965 break; 3966 case IBMVFC_MAD_FAILED: 3967 default: 3968 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && 3969 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) 3970 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3971 else if (tgt->logo_rcvd) 3972 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3973 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3974 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3975 else 3976 ibmvfc_del_tgt(tgt); 3977 3978 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3979 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 3980 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), status); 3981 break; 3982 } 3983 3984 kref_put(&tgt->kref, ibmvfc_release_tgt); 3985 ibmvfc_free_event(evt); 3986 wake_up(&vhost->work_wait_q); 3987 } 3988 3989 /** 3990 * ibmvfc_tgt_send_prli - Send a process login 3991 * @tgt: ibmvfc target struct 3992 * 3993 **/ 3994 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 3995 { 3996 struct ibmvfc_process_login *prli; 3997 struct ibmvfc_host *vhost = tgt->vhost; 3998 struct ibmvfc_event *evt; 3999 4000 if (vhost->discovery_threads >= disc_threads) 4001 return; 4002 4003 kref_get(&tgt->kref); 4004 evt = ibmvfc_get_event(&vhost->crq); 4005 vhost->discovery_threads++; 4006 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 4007 evt->tgt = tgt; 4008 prli = &evt->iu.prli; 4009 memset(prli, 0, sizeof(*prli)); 4010 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 4011 prli->common.version = cpu_to_be32(2); 4012 prli->target_wwpn = cpu_to_be64(tgt->wwpn); 4013 } else { 4014 prli->common.version = cpu_to_be32(1); 4015 } 4016 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); 4017 prli->common.length = cpu_to_be16(sizeof(*prli)); 4018 prli->scsi_id = cpu_to_be64(tgt->scsi_id); 4019 4020 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 4021 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); 4022 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); 4023 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED); 4024 4025 if (cls3_error) 4026 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY); 4027 4028 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4029 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4030 vhost->discovery_threads--; 4031 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4032 kref_put(&tgt->kref, ibmvfc_release_tgt); 4033 } else 4034 tgt_dbg(tgt, "Sent process login\n"); 4035 } 4036 4037 /** 4038 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 4039 * @evt: ibmvfc event struct 4040 * 4041 **/ 4042 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 4043 { 4044 struct ibmvfc_target *tgt = evt->tgt; 4045 struct ibmvfc_host *vhost = evt->vhost; 4046 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 4047 u32 status = be16_to_cpu(rsp->common.status); 4048 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4049 4050 vhost->discovery_threads--; 4051 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4052 switch (status) { 4053 case IBMVFC_MAD_SUCCESS: 4054 tgt_dbg(tgt, "Port Login succeeded\n"); 4055 if (tgt->ids.port_name && 4056 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 4057 vhost->reinit = 1; 4058 tgt_dbg(tgt, "Port re-init required\n"); 4059 break; 4060 } 4061 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 4062 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 4063 tgt->ids.port_id = tgt->scsi_id; 4064 memcpy(&tgt->service_parms, &rsp->service_parms, 4065 sizeof(tgt->service_parms)); 4066 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 4067 sizeof(tgt->service_parms_change)); 4068 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 4069 break; 4070 case IBMVFC_MAD_DRIVER_FAILED: 4071 break; 4072 case IBMVFC_MAD_CRQ_ERROR: 4073 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 4074 break; 4075 case IBMVFC_MAD_FAILED: 4076 default: 4077 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4078 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 4079 else 4080 ibmvfc_del_tgt(tgt); 4081 4082 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 4083 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4084 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), 4085 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), 4086 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status); 4087 break; 4088 } 4089 4090 kref_put(&tgt->kref, ibmvfc_release_tgt); 4091 ibmvfc_free_event(evt); 4092 wake_up(&vhost->work_wait_q); 4093 } 4094 4095 /** 4096 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 4097 * @tgt: ibmvfc target struct 4098 * 4099 **/ 4100 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 4101 { 4102 struct ibmvfc_port_login *plogi; 4103 struct ibmvfc_host *vhost = tgt->vhost; 4104 struct ibmvfc_event *evt; 4105 4106 if (vhost->discovery_threads >= disc_threads) 4107 return; 4108 4109 kref_get(&tgt->kref); 4110 tgt->logo_rcvd = 0; 4111 evt = ibmvfc_get_event(&vhost->crq); 4112 vhost->discovery_threads++; 4113 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4114 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 4115 evt->tgt = tgt; 4116 plogi = &evt->iu.plogi; 4117 memset(plogi, 0, sizeof(*plogi)); 4118 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 4119 plogi->common.version = cpu_to_be32(2); 4120 plogi->target_wwpn = cpu_to_be64(tgt->wwpn); 4121 } else { 4122 plogi->common.version = cpu_to_be32(1); 4123 } 4124 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 4125 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 4126 plogi->scsi_id = cpu_to_be64(tgt->scsi_id); 4127 4128 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4129 vhost->discovery_threads--; 4130 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4131 kref_put(&tgt->kref, ibmvfc_release_tgt); 4132 } else 4133 tgt_dbg(tgt, "Sent port login\n"); 4134 } 4135 4136 /** 4137 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 4138 * @evt: ibmvfc event struct 4139 * 4140 **/ 4141 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 4142 { 4143 struct ibmvfc_target *tgt = evt->tgt; 4144 struct ibmvfc_host *vhost = evt->vhost; 4145 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 4146 u32 status = be16_to_cpu(rsp->common.status); 4147 4148 vhost->discovery_threads--; 4149 ibmvfc_free_event(evt); 4150 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4151 4152 switch (status) { 4153 case IBMVFC_MAD_SUCCESS: 4154 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 4155 break; 4156 case IBMVFC_MAD_DRIVER_FAILED: 4157 kref_put(&tgt->kref, ibmvfc_release_tgt); 4158 wake_up(&vhost->work_wait_q); 4159 return; 4160 case IBMVFC_MAD_FAILED: 4161 default: 4162 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 4163 break; 4164 } 4165 4166 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 4167 kref_put(&tgt->kref, ibmvfc_release_tgt); 4168 wake_up(&vhost->work_wait_q); 4169 } 4170 4171 /** 4172 * __ibmvfc_tgt_get_implicit_logout_evt - Allocate and init an event for implicit logout 4173 * @tgt: ibmvfc target struct 4174 * @done: Routine to call when the event is responded to 4175 * 4176 * Returns: 4177 * Allocated and initialized ibmvfc_event struct 4178 **/ 4179 static struct ibmvfc_event *__ibmvfc_tgt_get_implicit_logout_evt(struct ibmvfc_target *tgt, 4180 void (*done) (struct ibmvfc_event *)) 4181 { 4182 struct ibmvfc_implicit_logout *mad; 4183 struct ibmvfc_host *vhost = tgt->vhost; 4184 struct ibmvfc_event *evt; 4185 4186 kref_get(&tgt->kref); 4187 evt = ibmvfc_get_event(&vhost->crq); 4188 ibmvfc_init_event(evt, done, IBMVFC_MAD_FORMAT); 4189 evt->tgt = tgt; 4190 mad = &evt->iu.implicit_logout; 4191 memset(mad, 0, sizeof(*mad)); 4192 mad->common.version = cpu_to_be32(1); 4193 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); 4194 mad->common.length = cpu_to_be16(sizeof(*mad)); 4195 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); 4196 return evt; 4197 } 4198 4199 /** 4200 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 4201 * @tgt: ibmvfc target struct 4202 * 4203 **/ 4204 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 4205 { 4206 struct ibmvfc_host *vhost = tgt->vhost; 4207 struct ibmvfc_event *evt; 4208 4209 if (vhost->discovery_threads >= disc_threads) 4210 return; 4211 4212 vhost->discovery_threads++; 4213 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, 4214 ibmvfc_tgt_implicit_logout_done); 4215 4216 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4217 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4218 vhost->discovery_threads--; 4219 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4220 kref_put(&tgt->kref, ibmvfc_release_tgt); 4221 } else 4222 tgt_dbg(tgt, "Sent Implicit Logout\n"); 4223 } 4224 4225 /** 4226 * ibmvfc_tgt_implicit_logout_and_del_done - Completion handler for Implicit Logout MAD 4227 * @evt: ibmvfc event struct 4228 * 4229 **/ 4230 static void ibmvfc_tgt_implicit_logout_and_del_done(struct ibmvfc_event *evt) 4231 { 4232 struct ibmvfc_target *tgt = evt->tgt; 4233 struct ibmvfc_host *vhost = evt->vhost; 4234 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 4235 u32 status = be16_to_cpu(mad->common.status); 4236 4237 vhost->discovery_threads--; 4238 ibmvfc_free_event(evt); 4239 4240 /* 4241 * If our state is IBMVFC_HOST_OFFLINE, we could be unloading the 4242 * driver in which case we need to free up all the targets. If we are 4243 * not unloading, we will still go through a hard reset to get out of 4244 * offline state, so there is no need to track the old targets in that 4245 * case. 4246 */ 4247 if (status == IBMVFC_MAD_SUCCESS || vhost->state == IBMVFC_HOST_OFFLINE) 4248 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4249 else 4250 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT); 4251 4252 tgt_dbg(tgt, "Implicit Logout %s\n", (status == IBMVFC_MAD_SUCCESS) ? "succeeded" : "failed"); 4253 kref_put(&tgt->kref, ibmvfc_release_tgt); 4254 wake_up(&vhost->work_wait_q); 4255 } 4256 4257 /** 4258 * ibmvfc_tgt_implicit_logout_and_del - Initiate an Implicit Logout for specified target 4259 * @tgt: ibmvfc target struct 4260 * 4261 **/ 4262 static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *tgt) 4263 { 4264 struct ibmvfc_host *vhost = tgt->vhost; 4265 struct ibmvfc_event *evt; 4266 4267 if (!vhost->logged_in) { 4268 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4269 return; 4270 } 4271 4272 if (vhost->discovery_threads >= disc_threads) 4273 return; 4274 4275 vhost->discovery_threads++; 4276 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, 4277 ibmvfc_tgt_implicit_logout_and_del_done); 4278 4279 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT); 4280 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4281 vhost->discovery_threads--; 4282 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4283 kref_put(&tgt->kref, ibmvfc_release_tgt); 4284 } else 4285 tgt_dbg(tgt, "Sent Implicit Logout\n"); 4286 } 4287 4288 /** 4289 * ibmvfc_tgt_move_login_done - Completion handler for Move Login 4290 * @evt: ibmvfc event struct 4291 * 4292 **/ 4293 static void ibmvfc_tgt_move_login_done(struct ibmvfc_event *evt) 4294 { 4295 struct ibmvfc_target *tgt = evt->tgt; 4296 struct ibmvfc_host *vhost = evt->vhost; 4297 struct ibmvfc_move_login *rsp = &evt->xfer_iu->move_login; 4298 u32 status = be16_to_cpu(rsp->common.status); 4299 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4300 4301 vhost->discovery_threads--; 4302 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4303 switch (status) { 4304 case IBMVFC_MAD_SUCCESS: 4305 tgt_dbg(tgt, "Move Login succeeded for new scsi_id: %llX\n", tgt->new_scsi_id); 4306 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 4307 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 4308 tgt->scsi_id = tgt->new_scsi_id; 4309 tgt->ids.port_id = tgt->scsi_id; 4310 memcpy(&tgt->service_parms, &rsp->service_parms, 4311 sizeof(tgt->service_parms)); 4312 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 4313 sizeof(tgt->service_parms_change)); 4314 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 4315 break; 4316 case IBMVFC_MAD_DRIVER_FAILED: 4317 break; 4318 case IBMVFC_MAD_CRQ_ERROR: 4319 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); 4320 break; 4321 case IBMVFC_MAD_FAILED: 4322 default: 4323 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); 4324 4325 tgt_log(tgt, level, 4326 "Move Login failed: new scsi_id: %llX, flags:%x, vios_flags:%x, rc=0x%02X\n", 4327 tgt->new_scsi_id, be32_to_cpu(rsp->flags), be16_to_cpu(rsp->vios_flags), 4328 status); 4329 break; 4330 } 4331 4332 kref_put(&tgt->kref, ibmvfc_release_tgt); 4333 ibmvfc_free_event(evt); 4334 wake_up(&vhost->work_wait_q); 4335 } 4336 4337 4338 /** 4339 * ibmvfc_tgt_move_login - Initiate a move login for specified target 4340 * @tgt: ibmvfc target struct 4341 * 4342 **/ 4343 static void ibmvfc_tgt_move_login(struct ibmvfc_target *tgt) 4344 { 4345 struct ibmvfc_host *vhost = tgt->vhost; 4346 struct ibmvfc_move_login *move; 4347 struct ibmvfc_event *evt; 4348 4349 if (vhost->discovery_threads >= disc_threads) 4350 return; 4351 4352 kref_get(&tgt->kref); 4353 evt = ibmvfc_get_event(&vhost->crq); 4354 vhost->discovery_threads++; 4355 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4356 ibmvfc_init_event(evt, ibmvfc_tgt_move_login_done, IBMVFC_MAD_FORMAT); 4357 evt->tgt = tgt; 4358 move = &evt->iu.move_login; 4359 memset(move, 0, sizeof(*move)); 4360 move->common.version = cpu_to_be32(1); 4361 move->common.opcode = cpu_to_be32(IBMVFC_MOVE_LOGIN); 4362 move->common.length = cpu_to_be16(sizeof(*move)); 4363 4364 move->old_scsi_id = cpu_to_be64(tgt->scsi_id); 4365 move->new_scsi_id = cpu_to_be64(tgt->new_scsi_id); 4366 move->wwpn = cpu_to_be64(tgt->wwpn); 4367 move->node_name = cpu_to_be64(tgt->ids.node_name); 4368 4369 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4370 vhost->discovery_threads--; 4371 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4372 kref_put(&tgt->kref, ibmvfc_release_tgt); 4373 } else 4374 tgt_dbg(tgt, "Sent Move Login for new scsi_id: %llX\n", tgt->new_scsi_id); 4375 } 4376 4377 /** 4378 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 4379 * @mad: ibmvfc passthru mad struct 4380 * @tgt: ibmvfc target struct 4381 * 4382 * Returns: 4383 * 1 if PLOGI needed / 0 if PLOGI not needed 4384 **/ 4385 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 4386 struct ibmvfc_target *tgt) 4387 { 4388 if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name) 4389 return 1; 4390 if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name) 4391 return 1; 4392 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) 4393 return 1; 4394 return 0; 4395 } 4396 4397 /** 4398 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 4399 * @evt: ibmvfc event struct 4400 * 4401 **/ 4402 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 4403 { 4404 struct ibmvfc_target *tgt = evt->tgt; 4405 struct ibmvfc_host *vhost = evt->vhost; 4406 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 4407 u32 status = be16_to_cpu(mad->common.status); 4408 u8 fc_reason, fc_explain; 4409 4410 vhost->discovery_threads--; 4411 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4412 del_timer(&tgt->timer); 4413 4414 switch (status) { 4415 case IBMVFC_MAD_SUCCESS: 4416 tgt_dbg(tgt, "ADISC succeeded\n"); 4417 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 4418 ibmvfc_del_tgt(tgt); 4419 break; 4420 case IBMVFC_MAD_DRIVER_FAILED: 4421 break; 4422 case IBMVFC_MAD_FAILED: 4423 default: 4424 ibmvfc_del_tgt(tgt); 4425 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; 4426 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; 4427 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 4428 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), 4429 be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error), 4430 ibmvfc_get_fc_type(fc_reason), fc_reason, 4431 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 4432 break; 4433 } 4434 4435 kref_put(&tgt->kref, ibmvfc_release_tgt); 4436 ibmvfc_free_event(evt); 4437 wake_up(&vhost->work_wait_q); 4438 } 4439 4440 /** 4441 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 4442 * @evt: ibmvfc event struct 4443 * 4444 **/ 4445 static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 4446 { 4447 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 4448 4449 memset(mad, 0, sizeof(*mad)); 4450 mad->common.version = cpu_to_be32(1); 4451 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 4452 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 4453 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 4454 offsetof(struct ibmvfc_passthru_mad, iu)); 4455 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 4456 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 4457 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); 4458 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 4459 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 4460 offsetof(struct ibmvfc_passthru_fc_iu, payload)); 4461 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 4462 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 4463 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 4464 offsetof(struct ibmvfc_passthru_fc_iu, response)); 4465 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); 4466 } 4467 4468 /** 4469 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 4470 * @evt: ibmvfc event struct 4471 * 4472 * Just cleanup this event struct. Everything else is handled by 4473 * the ADISC completion handler. If the ADISC never actually comes 4474 * back, we still have the timer running on the ADISC event struct 4475 * which will fire and cause the CRQ to get reset. 4476 * 4477 **/ 4478 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 4479 { 4480 struct ibmvfc_host *vhost = evt->vhost; 4481 struct ibmvfc_target *tgt = evt->tgt; 4482 4483 tgt_dbg(tgt, "ADISC cancel complete\n"); 4484 vhost->abort_threads--; 4485 ibmvfc_free_event(evt); 4486 kref_put(&tgt->kref, ibmvfc_release_tgt); 4487 wake_up(&vhost->work_wait_q); 4488 } 4489 4490 /** 4491 * ibmvfc_adisc_timeout - Handle an ADISC timeout 4492 * @t: ibmvfc target struct 4493 * 4494 * If an ADISC times out, send a cancel. If the cancel times 4495 * out, reset the CRQ. When the ADISC comes back as cancelled, 4496 * log back into the target. 4497 **/ 4498 static void ibmvfc_adisc_timeout(struct timer_list *t) 4499 { 4500 struct ibmvfc_target *tgt = from_timer(tgt, t, timer); 4501 struct ibmvfc_host *vhost = tgt->vhost; 4502 struct ibmvfc_event *evt; 4503 struct ibmvfc_tmf *tmf; 4504 unsigned long flags; 4505 int rc; 4506 4507 tgt_dbg(tgt, "ADISC timeout\n"); 4508 spin_lock_irqsave(vhost->host->host_lock, flags); 4509 if (vhost->abort_threads >= disc_threads || 4510 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 4511 vhost->state != IBMVFC_INITIALIZING || 4512 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 4513 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4514 return; 4515 } 4516 4517 vhost->abort_threads++; 4518 kref_get(&tgt->kref); 4519 evt = ibmvfc_get_event(&vhost->crq); 4520 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 4521 4522 evt->tgt = tgt; 4523 tmf = &evt->iu.tmf; 4524 memset(tmf, 0, sizeof(*tmf)); 4525 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 4526 tmf->common.version = cpu_to_be32(2); 4527 tmf->target_wwpn = cpu_to_be64(tgt->wwpn); 4528 } else { 4529 tmf->common.version = cpu_to_be32(1); 4530 } 4531 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 4532 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 4533 tmf->scsi_id = cpu_to_be64(tgt->scsi_id); 4534 tmf->cancel_key = cpu_to_be32(tgt->cancel_key); 4535 4536 rc = ibmvfc_send_event(evt, vhost, default_timeout); 4537 4538 if (rc) { 4539 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 4540 vhost->abort_threads--; 4541 kref_put(&tgt->kref, ibmvfc_release_tgt); 4542 __ibmvfc_reset_host(vhost); 4543 } else 4544 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 4545 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4546 } 4547 4548 /** 4549 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 4550 * @tgt: ibmvfc target struct 4551 * 4552 * When sending an ADISC we end up with two timers running. The 4553 * first timer is the timer in the ibmvfc target struct. If this 4554 * fires, we send a cancel to the target. The second timer is the 4555 * timer on the ibmvfc event for the ADISC, which is longer. If that 4556 * fires, it means the ADISC timed out and our attempt to cancel it 4557 * also failed, so we need to reset the CRQ. 4558 **/ 4559 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 4560 { 4561 struct ibmvfc_passthru_mad *mad; 4562 struct ibmvfc_host *vhost = tgt->vhost; 4563 struct ibmvfc_event *evt; 4564 4565 if (vhost->discovery_threads >= disc_threads) 4566 return; 4567 4568 kref_get(&tgt->kref); 4569 evt = ibmvfc_get_event(&vhost->crq); 4570 vhost->discovery_threads++; 4571 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 4572 evt->tgt = tgt; 4573 4574 ibmvfc_init_passthru(evt); 4575 mad = &evt->iu.passthru; 4576 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); 4577 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); 4578 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); 4579 4580 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); 4581 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 4582 sizeof(vhost->login_buf->resp.port_name)); 4583 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 4584 sizeof(vhost->login_buf->resp.node_name)); 4585 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); 4586 4587 if (timer_pending(&tgt->timer)) 4588 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 4589 else { 4590 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 4591 add_timer(&tgt->timer); 4592 } 4593 4594 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4595 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 4596 vhost->discovery_threads--; 4597 del_timer(&tgt->timer); 4598 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4599 kref_put(&tgt->kref, ibmvfc_release_tgt); 4600 } else 4601 tgt_dbg(tgt, "Sent ADISC\n"); 4602 } 4603 4604 /** 4605 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 4606 * @evt: ibmvfc event struct 4607 * 4608 **/ 4609 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 4610 { 4611 struct ibmvfc_target *tgt = evt->tgt; 4612 struct ibmvfc_host *vhost = evt->vhost; 4613 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 4614 u32 status = be16_to_cpu(rsp->common.status); 4615 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4616 4617 vhost->discovery_threads--; 4618 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4619 switch (status) { 4620 case IBMVFC_MAD_SUCCESS: 4621 tgt_dbg(tgt, "Query Target succeeded\n"); 4622 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) 4623 ibmvfc_del_tgt(tgt); 4624 else 4625 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 4626 break; 4627 case IBMVFC_MAD_DRIVER_FAILED: 4628 break; 4629 case IBMVFC_MAD_CRQ_ERROR: 4630 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 4631 break; 4632 case IBMVFC_MAD_FAILED: 4633 default: 4634 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 4635 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && 4636 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) 4637 ibmvfc_del_tgt(tgt); 4638 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4639 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 4640 else 4641 ibmvfc_del_tgt(tgt); 4642 4643 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 4644 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4645 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), 4646 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), 4647 ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), 4648 status); 4649 break; 4650 } 4651 4652 kref_put(&tgt->kref, ibmvfc_release_tgt); 4653 ibmvfc_free_event(evt); 4654 wake_up(&vhost->work_wait_q); 4655 } 4656 4657 /** 4658 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 4659 * @tgt: ibmvfc target struct 4660 * 4661 **/ 4662 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 4663 { 4664 struct ibmvfc_query_tgt *query_tgt; 4665 struct ibmvfc_host *vhost = tgt->vhost; 4666 struct ibmvfc_event *evt; 4667 4668 if (vhost->discovery_threads >= disc_threads) 4669 return; 4670 4671 kref_get(&tgt->kref); 4672 evt = ibmvfc_get_event(&vhost->crq); 4673 vhost->discovery_threads++; 4674 evt->tgt = tgt; 4675 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 4676 query_tgt = &evt->iu.query_tgt; 4677 memset(query_tgt, 0, sizeof(*query_tgt)); 4678 query_tgt->common.version = cpu_to_be32(1); 4679 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); 4680 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); 4681 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); 4682 4683 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4684 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4685 vhost->discovery_threads--; 4686 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4687 kref_put(&tgt->kref, ibmvfc_release_tgt); 4688 } else 4689 tgt_dbg(tgt, "Sent Query Target\n"); 4690 } 4691 4692 /** 4693 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 4694 * @vhost: ibmvfc host struct 4695 * @target: Holds SCSI ID to allocate target forand the WWPN 4696 * 4697 * Returns: 4698 * 0 on success / other on failure 4699 **/ 4700 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, 4701 struct ibmvfc_discover_targets_entry *target) 4702 { 4703 struct ibmvfc_target *stgt = NULL; 4704 struct ibmvfc_target *wtgt = NULL; 4705 struct ibmvfc_target *tgt; 4706 unsigned long flags; 4707 u64 scsi_id = be32_to_cpu(target->scsi_id) & IBMVFC_DISC_TGT_SCSI_ID_MASK; 4708 u64 wwpn = be64_to_cpu(target->wwpn); 4709 4710 /* Look to see if we already have a target allocated for this SCSI ID or WWPN */ 4711 spin_lock_irqsave(vhost->host->host_lock, flags); 4712 list_for_each_entry(tgt, &vhost->targets, queue) { 4713 if (tgt->wwpn == wwpn) { 4714 wtgt = tgt; 4715 break; 4716 } 4717 } 4718 4719 list_for_each_entry(tgt, &vhost->targets, queue) { 4720 if (tgt->scsi_id == scsi_id) { 4721 stgt = tgt; 4722 break; 4723 } 4724 } 4725 4726 if (wtgt && !stgt) { 4727 /* 4728 * A WWPN target has moved and we still are tracking the old 4729 * SCSI ID. The only way we should be able to get here is if 4730 * we attempted to send an implicit logout for the old SCSI ID 4731 * and it failed for some reason, such as there being I/O 4732 * pending to the target. In this case, we will have already 4733 * deleted the rport from the FC transport so we do a move 4734 * login, which works even with I/O pending, however, if 4735 * there is still I/O pending, it will stay outstanding, so 4736 * we only do this if fast fail is disabled for the rport, 4737 * otherwise we let terminate_rport_io clean up the port 4738 * before we login at the new location. 4739 */ 4740 if (wtgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 4741 if (wtgt->move_login) { 4742 /* 4743 * Do a move login here. The old target is no longer 4744 * known to the transport layer We don't use the 4745 * normal ibmvfc_set_tgt_action to set this, as we 4746 * don't normally want to allow this state change. 4747 */ 4748 wtgt->new_scsi_id = scsi_id; 4749 wtgt->action = IBMVFC_TGT_ACTION_INIT; 4750 wtgt->init_retries = 0; 4751 ibmvfc_init_tgt(wtgt, ibmvfc_tgt_move_login); 4752 } 4753 goto unlock_out; 4754 } else { 4755 tgt_err(wtgt, "Unexpected target state: %d, %p\n", 4756 wtgt->action, wtgt->rport); 4757 } 4758 } else if (stgt) { 4759 if (tgt->need_login) 4760 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 4761 goto unlock_out; 4762 } 4763 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4764 4765 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 4766 memset(tgt, 0, sizeof(*tgt)); 4767 tgt->scsi_id = scsi_id; 4768 tgt->wwpn = wwpn; 4769 tgt->vhost = vhost; 4770 tgt->need_login = 1; 4771 timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0); 4772 kref_init(&tgt->kref); 4773 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 4774 spin_lock_irqsave(vhost->host->host_lock, flags); 4775 tgt->cancel_key = vhost->task_set++; 4776 list_add_tail(&tgt->queue, &vhost->targets); 4777 4778 unlock_out: 4779 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4780 return 0; 4781 } 4782 4783 /** 4784 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 4785 * @vhost: ibmvfc host struct 4786 * 4787 * Returns: 4788 * 0 on success / other on failure 4789 **/ 4790 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 4791 { 4792 int i, rc; 4793 4794 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 4795 rc = ibmvfc_alloc_target(vhost, &vhost->disc_buf[i]); 4796 4797 return rc; 4798 } 4799 4800 /** 4801 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 4802 * @evt: ibmvfc event struct 4803 * 4804 **/ 4805 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 4806 { 4807 struct ibmvfc_host *vhost = evt->vhost; 4808 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 4809 u32 mad_status = be16_to_cpu(rsp->common.status); 4810 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4811 4812 switch (mad_status) { 4813 case IBMVFC_MAD_SUCCESS: 4814 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 4815 vhost->num_targets = be32_to_cpu(rsp->num_written); 4816 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 4817 break; 4818 case IBMVFC_MAD_FAILED: 4819 level += ibmvfc_retry_host_init(vhost); 4820 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 4821 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4822 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); 4823 break; 4824 case IBMVFC_MAD_DRIVER_FAILED: 4825 break; 4826 default: 4827 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 4828 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4829 break; 4830 } 4831 4832 ibmvfc_free_event(evt); 4833 wake_up(&vhost->work_wait_q); 4834 } 4835 4836 /** 4837 * ibmvfc_discover_targets - Send Discover Targets MAD 4838 * @vhost: ibmvfc host struct 4839 * 4840 **/ 4841 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 4842 { 4843 struct ibmvfc_discover_targets *mad; 4844 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); 4845 4846 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 4847 mad = &evt->iu.discover_targets; 4848 memset(mad, 0, sizeof(*mad)); 4849 mad->common.version = cpu_to_be32(1); 4850 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); 4851 mad->common.length = cpu_to_be16(sizeof(*mad)); 4852 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz); 4853 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma); 4854 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz); 4855 mad->flags = cpu_to_be32(IBMVFC_DISC_TGT_PORT_ID_WWPN_LIST); 4856 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4857 4858 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4859 ibmvfc_dbg(vhost, "Sent discover targets\n"); 4860 else 4861 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4862 } 4863 4864 static void ibmvfc_channel_setup_done(struct ibmvfc_event *evt) 4865 { 4866 struct ibmvfc_host *vhost = evt->vhost; 4867 struct ibmvfc_channel_setup *setup = vhost->channel_setup_buf; 4868 struct ibmvfc_scsi_channels *scrqs = &vhost->scsi_scrqs; 4869 u32 mad_status = be16_to_cpu(evt->xfer_iu->channel_setup.common.status); 4870 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4871 int flags, active_queues, i; 4872 4873 ibmvfc_free_event(evt); 4874 4875 switch (mad_status) { 4876 case IBMVFC_MAD_SUCCESS: 4877 ibmvfc_dbg(vhost, "Channel Setup succeeded\n"); 4878 flags = be32_to_cpu(setup->flags); 4879 vhost->do_enquiry = 0; 4880 active_queues = be32_to_cpu(setup->num_scsi_subq_channels); 4881 scrqs->active_queues = active_queues; 4882 4883 if (flags & IBMVFC_CHANNELS_CANCELED) { 4884 ibmvfc_dbg(vhost, "Channels Canceled\n"); 4885 vhost->using_channels = 0; 4886 } else { 4887 if (active_queues) 4888 vhost->using_channels = 1; 4889 for (i = 0; i < active_queues; i++) 4890 scrqs->scrqs[i].vios_cookie = 4891 be64_to_cpu(setup->channel_handles[i]); 4892 4893 ibmvfc_dbg(vhost, "Using %u channels\n", 4894 vhost->scsi_scrqs.active_queues); 4895 } 4896 break; 4897 case IBMVFC_MAD_FAILED: 4898 level += ibmvfc_retry_host_init(vhost); 4899 ibmvfc_log(vhost, level, "Channel Setup failed\n"); 4900 fallthrough; 4901 case IBMVFC_MAD_DRIVER_FAILED: 4902 return; 4903 default: 4904 dev_err(vhost->dev, "Invalid Channel Setup response: 0x%x\n", 4905 mad_status); 4906 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4907 return; 4908 } 4909 4910 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4911 wake_up(&vhost->work_wait_q); 4912 } 4913 4914 static void ibmvfc_channel_setup(struct ibmvfc_host *vhost) 4915 { 4916 struct ibmvfc_channel_setup_mad *mad; 4917 struct ibmvfc_channel_setup *setup_buf = vhost->channel_setup_buf; 4918 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); 4919 struct ibmvfc_scsi_channels *scrqs = &vhost->scsi_scrqs; 4920 unsigned int num_channels = 4921 min(vhost->client_scsi_channels, vhost->max_vios_scsi_channels); 4922 int i; 4923 4924 memset(setup_buf, 0, sizeof(*setup_buf)); 4925 if (num_channels == 0) 4926 setup_buf->flags = cpu_to_be32(IBMVFC_CANCEL_CHANNELS); 4927 else { 4928 setup_buf->num_scsi_subq_channels = cpu_to_be32(num_channels); 4929 for (i = 0; i < num_channels; i++) 4930 setup_buf->channel_handles[i] = cpu_to_be64(scrqs->scrqs[i].cookie); 4931 } 4932 4933 ibmvfc_init_event(evt, ibmvfc_channel_setup_done, IBMVFC_MAD_FORMAT); 4934 mad = &evt->iu.channel_setup; 4935 memset(mad, 0, sizeof(*mad)); 4936 mad->common.version = cpu_to_be32(1); 4937 mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_SETUP); 4938 mad->common.length = cpu_to_be16(sizeof(*mad)); 4939 mad->buffer.va = cpu_to_be64(vhost->channel_setup_dma); 4940 mad->buffer.len = cpu_to_be32(sizeof(*vhost->channel_setup_buf)); 4941 4942 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4943 4944 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4945 ibmvfc_dbg(vhost, "Sent channel setup\n"); 4946 else 4947 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 4948 } 4949 4950 static void ibmvfc_channel_enquiry_done(struct ibmvfc_event *evt) 4951 { 4952 struct ibmvfc_host *vhost = evt->vhost; 4953 struct ibmvfc_channel_enquiry *rsp = &evt->xfer_iu->channel_enquiry; 4954 u32 mad_status = be16_to_cpu(rsp->common.status); 4955 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4956 4957 switch (mad_status) { 4958 case IBMVFC_MAD_SUCCESS: 4959 ibmvfc_dbg(vhost, "Channel Enquiry succeeded\n"); 4960 vhost->max_vios_scsi_channels = be32_to_cpu(rsp->num_scsi_subq_channels); 4961 ibmvfc_free_event(evt); 4962 break; 4963 case IBMVFC_MAD_FAILED: 4964 level += ibmvfc_retry_host_init(vhost); 4965 ibmvfc_log(vhost, level, "Channel Enquiry failed\n"); 4966 fallthrough; 4967 case IBMVFC_MAD_DRIVER_FAILED: 4968 ibmvfc_free_event(evt); 4969 return; 4970 default: 4971 dev_err(vhost->dev, "Invalid Channel Enquiry response: 0x%x\n", 4972 mad_status); 4973 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4974 ibmvfc_free_event(evt); 4975 return; 4976 } 4977 4978 ibmvfc_channel_setup(vhost); 4979 } 4980 4981 static void ibmvfc_channel_enquiry(struct ibmvfc_host *vhost) 4982 { 4983 struct ibmvfc_channel_enquiry *mad; 4984 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); 4985 4986 ibmvfc_init_event(evt, ibmvfc_channel_enquiry_done, IBMVFC_MAD_FORMAT); 4987 mad = &evt->iu.channel_enquiry; 4988 memset(mad, 0, sizeof(*mad)); 4989 mad->common.version = cpu_to_be32(1); 4990 mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_ENQUIRY); 4991 mad->common.length = cpu_to_be16(sizeof(*mad)); 4992 4993 if (mig_channels_only) 4994 mad->flags |= cpu_to_be32(IBMVFC_NO_CHANNELS_TO_CRQ_SUPPORT); 4995 if (mig_no_less_channels) 4996 mad->flags |= cpu_to_be32(IBMVFC_NO_N_TO_M_CHANNELS_SUPPORT); 4997 4998 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4999 5000 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5001 ibmvfc_dbg(vhost, "Send channel enquiry\n"); 5002 else 5003 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5004 } 5005 5006 /** 5007 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 5008 * @evt: ibmvfc event struct 5009 * 5010 **/ 5011 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 5012 { 5013 struct ibmvfc_host *vhost = evt->vhost; 5014 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); 5015 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 5016 unsigned int npiv_max_sectors; 5017 int level = IBMVFC_DEFAULT_LOG_LEVEL; 5018 5019 switch (mad_status) { 5020 case IBMVFC_MAD_SUCCESS: 5021 ibmvfc_free_event(evt); 5022 break; 5023 case IBMVFC_MAD_FAILED: 5024 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 5025 level += ibmvfc_retry_host_init(vhost); 5026 else 5027 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5028 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 5029 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 5030 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); 5031 ibmvfc_free_event(evt); 5032 return; 5033 case IBMVFC_MAD_CRQ_ERROR: 5034 ibmvfc_retry_host_init(vhost); 5035 fallthrough; 5036 case IBMVFC_MAD_DRIVER_FAILED: 5037 ibmvfc_free_event(evt); 5038 return; 5039 default: 5040 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 5041 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5042 ibmvfc_free_event(evt); 5043 return; 5044 } 5045 5046 vhost->client_migrated = 0; 5047 5048 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { 5049 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 5050 rsp->flags); 5051 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5052 wake_up(&vhost->work_wait_q); 5053 return; 5054 } 5055 5056 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { 5057 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 5058 rsp->max_cmds); 5059 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5060 wake_up(&vhost->work_wait_q); 5061 return; 5062 } 5063 5064 vhost->logged_in = 1; 5065 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); 5066 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 5067 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 5068 rsp->drc_name, npiv_max_sectors); 5069 5070 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); 5071 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); 5072 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); 5073 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); 5074 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 5075 fc_host_supported_classes(vhost->host) = 0; 5076 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) 5077 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 5078 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) 5079 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 5080 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) 5081 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 5082 fc_host_maxframe_size(vhost->host) = 5083 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; 5084 5085 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; 5086 vhost->host->max_sectors = npiv_max_sectors; 5087 5088 if (ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPORT_CHANNELS) && vhost->do_enquiry) { 5089 ibmvfc_channel_enquiry(vhost); 5090 } else { 5091 vhost->do_enquiry = 0; 5092 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 5093 wake_up(&vhost->work_wait_q); 5094 } 5095 } 5096 5097 /** 5098 * ibmvfc_npiv_login - Sends NPIV login 5099 * @vhost: ibmvfc host struct 5100 * 5101 **/ 5102 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 5103 { 5104 struct ibmvfc_npiv_login_mad *mad; 5105 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); 5106 5107 ibmvfc_gather_partition_info(vhost); 5108 ibmvfc_set_login_info(vhost); 5109 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 5110 5111 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 5112 mad = &evt->iu.npiv_login; 5113 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 5114 mad->common.version = cpu_to_be32(1); 5115 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); 5116 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); 5117 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); 5118 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); 5119 5120 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 5121 5122 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5123 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 5124 else 5125 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5126 } 5127 5128 /** 5129 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 5130 * @evt: ibmvfc event struct 5131 * 5132 **/ 5133 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 5134 { 5135 struct ibmvfc_host *vhost = evt->vhost; 5136 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); 5137 5138 ibmvfc_free_event(evt); 5139 5140 switch (mad_status) { 5141 case IBMVFC_MAD_SUCCESS: 5142 if (list_empty(&vhost->crq.sent) && 5143 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 5144 ibmvfc_init_host(vhost); 5145 return; 5146 } 5147 break; 5148 case IBMVFC_MAD_FAILED: 5149 case IBMVFC_MAD_NOT_SUPPORTED: 5150 case IBMVFC_MAD_CRQ_ERROR: 5151 case IBMVFC_MAD_DRIVER_FAILED: 5152 default: 5153 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 5154 break; 5155 } 5156 5157 ibmvfc_hard_reset_host(vhost); 5158 } 5159 5160 /** 5161 * ibmvfc_npiv_logout - Issue an NPIV Logout 5162 * @vhost: ibmvfc host struct 5163 * 5164 **/ 5165 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 5166 { 5167 struct ibmvfc_npiv_logout_mad *mad; 5168 struct ibmvfc_event *evt; 5169 5170 evt = ibmvfc_get_event(&vhost->crq); 5171 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 5172 5173 mad = &evt->iu.npiv_logout; 5174 memset(mad, 0, sizeof(*mad)); 5175 mad->common.version = cpu_to_be32(1); 5176 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); 5177 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); 5178 5179 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 5180 5181 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5182 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 5183 else 5184 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5185 } 5186 5187 /** 5188 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 5189 * @vhost: ibmvfc host struct 5190 * 5191 * Returns: 5192 * 1 if work to do / 0 if not 5193 **/ 5194 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 5195 { 5196 struct ibmvfc_target *tgt; 5197 5198 list_for_each_entry(tgt, &vhost->targets, queue) { 5199 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 5200 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 5201 return 1; 5202 } 5203 5204 return 0; 5205 } 5206 5207 /** 5208 * ibmvfc_dev_logo_to_do - Is there target logout work to do? 5209 * @vhost: ibmvfc host struct 5210 * 5211 * Returns: 5212 * 1 if work to do / 0 if not 5213 **/ 5214 static int ibmvfc_dev_logo_to_do(struct ibmvfc_host *vhost) 5215 { 5216 struct ibmvfc_target *tgt; 5217 5218 list_for_each_entry(tgt, &vhost->targets, queue) { 5219 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT || 5220 tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) 5221 return 1; 5222 } 5223 return 0; 5224 } 5225 5226 /** 5227 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 5228 * @vhost: ibmvfc host struct 5229 * 5230 * Returns: 5231 * 1 if work to do / 0 if not 5232 **/ 5233 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 5234 { 5235 struct ibmvfc_target *tgt; 5236 5237 if (kthread_should_stop()) 5238 return 1; 5239 switch (vhost->action) { 5240 case IBMVFC_HOST_ACTION_NONE: 5241 case IBMVFC_HOST_ACTION_INIT_WAIT: 5242 case IBMVFC_HOST_ACTION_LOGO_WAIT: 5243 return 0; 5244 case IBMVFC_HOST_ACTION_TGT_INIT: 5245 case IBMVFC_HOST_ACTION_QUERY_TGTS: 5246 if (vhost->discovery_threads == disc_threads) 5247 return 0; 5248 list_for_each_entry(tgt, &vhost->targets, queue) 5249 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 5250 return 1; 5251 list_for_each_entry(tgt, &vhost->targets, queue) 5252 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 5253 return 0; 5254 return 1; 5255 case IBMVFC_HOST_ACTION_TGT_DEL: 5256 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 5257 if (vhost->discovery_threads == disc_threads) 5258 return 0; 5259 list_for_each_entry(tgt, &vhost->targets, queue) 5260 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) 5261 return 1; 5262 list_for_each_entry(tgt, &vhost->targets, queue) 5263 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) 5264 return 0; 5265 return 1; 5266 case IBMVFC_HOST_ACTION_LOGO: 5267 case IBMVFC_HOST_ACTION_INIT: 5268 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 5269 case IBMVFC_HOST_ACTION_QUERY: 5270 case IBMVFC_HOST_ACTION_RESET: 5271 case IBMVFC_HOST_ACTION_REENABLE: 5272 default: 5273 break; 5274 } 5275 5276 return 1; 5277 } 5278 5279 /** 5280 * ibmvfc_work_to_do - Is there task level work to do? 5281 * @vhost: ibmvfc host struct 5282 * 5283 * Returns: 5284 * 1 if work to do / 0 if not 5285 **/ 5286 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 5287 { 5288 unsigned long flags; 5289 int rc; 5290 5291 spin_lock_irqsave(vhost->host->host_lock, flags); 5292 rc = __ibmvfc_work_to_do(vhost); 5293 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5294 return rc; 5295 } 5296 5297 /** 5298 * ibmvfc_log_ae - Log async events if necessary 5299 * @vhost: ibmvfc host struct 5300 * @events: events to log 5301 * 5302 **/ 5303 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 5304 { 5305 if (events & IBMVFC_AE_RSCN) 5306 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 5307 if ((events & IBMVFC_AE_LINKDOWN) && 5308 vhost->state >= IBMVFC_HALTED) 5309 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 5310 if ((events & IBMVFC_AE_LINKUP) && 5311 vhost->state == IBMVFC_INITIALIZING) 5312 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 5313 } 5314 5315 /** 5316 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 5317 * @tgt: ibmvfc target struct 5318 * 5319 **/ 5320 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 5321 { 5322 struct ibmvfc_host *vhost = tgt->vhost; 5323 struct fc_rport *rport; 5324 unsigned long flags; 5325 5326 tgt_dbg(tgt, "Adding rport\n"); 5327 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 5328 spin_lock_irqsave(vhost->host->host_lock, flags); 5329 5330 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 5331 tgt_dbg(tgt, "Deleting rport\n"); 5332 list_del(&tgt->queue); 5333 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 5334 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5335 fc_remote_port_delete(rport); 5336 del_timer_sync(&tgt->timer); 5337 kref_put(&tgt->kref, ibmvfc_release_tgt); 5338 return; 5339 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 5340 tgt_dbg(tgt, "Deleting rport with outstanding I/O\n"); 5341 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); 5342 tgt->rport = NULL; 5343 tgt->init_retries = 0; 5344 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5345 fc_remote_port_delete(rport); 5346 return; 5347 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 5348 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5349 return; 5350 } 5351 5352 if (rport) { 5353 tgt_dbg(tgt, "rport add succeeded\n"); 5354 tgt->rport = rport; 5355 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; 5356 rport->supported_classes = 0; 5357 tgt->target_id = rport->scsi_target_id; 5358 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) 5359 rport->supported_classes |= FC_COS_CLASS1; 5360 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) 5361 rport->supported_classes |= FC_COS_CLASS2; 5362 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) 5363 rport->supported_classes |= FC_COS_CLASS3; 5364 if (rport->rqst_q) 5365 blk_queue_max_segments(rport->rqst_q, 1); 5366 } else 5367 tgt_dbg(tgt, "rport add failed\n"); 5368 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5369 } 5370 5371 /** 5372 * ibmvfc_do_work - Do task level work 5373 * @vhost: ibmvfc host struct 5374 * 5375 **/ 5376 static void ibmvfc_do_work(struct ibmvfc_host *vhost) 5377 { 5378 struct ibmvfc_target *tgt; 5379 unsigned long flags; 5380 struct fc_rport *rport; 5381 LIST_HEAD(purge); 5382 int rc; 5383 5384 ibmvfc_log_ae(vhost, vhost->events_to_log); 5385 spin_lock_irqsave(vhost->host->host_lock, flags); 5386 vhost->events_to_log = 0; 5387 switch (vhost->action) { 5388 case IBMVFC_HOST_ACTION_NONE: 5389 case IBMVFC_HOST_ACTION_LOGO_WAIT: 5390 case IBMVFC_HOST_ACTION_INIT_WAIT: 5391 break; 5392 case IBMVFC_HOST_ACTION_RESET: 5393 list_splice_init(&vhost->purge, &purge); 5394 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5395 ibmvfc_complete_purge(&purge); 5396 rc = ibmvfc_reset_crq(vhost); 5397 5398 spin_lock_irqsave(vhost->host->host_lock, flags); 5399 if (!rc || rc == H_CLOSED) 5400 vio_enable_interrupts(to_vio_dev(vhost->dev)); 5401 if (vhost->action == IBMVFC_HOST_ACTION_RESET) { 5402 /* 5403 * The only action we could have changed to would have 5404 * been reenable, in which case, we skip the rest of 5405 * this path and wait until we've done the re-enable 5406 * before sending the crq init. 5407 */ 5408 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 5409 5410 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 5411 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 5412 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5413 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 5414 } 5415 } 5416 break; 5417 case IBMVFC_HOST_ACTION_REENABLE: 5418 list_splice_init(&vhost->purge, &purge); 5419 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5420 ibmvfc_complete_purge(&purge); 5421 rc = ibmvfc_reenable_crq_queue(vhost); 5422 5423 spin_lock_irqsave(vhost->host->host_lock, flags); 5424 if (vhost->action == IBMVFC_HOST_ACTION_REENABLE) { 5425 /* 5426 * The only action we could have changed to would have 5427 * been reset, in which case, we skip the rest of this 5428 * path and wait until we've done the reset before 5429 * sending the crq init. 5430 */ 5431 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 5432 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 5433 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5434 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 5435 } 5436 } 5437 break; 5438 case IBMVFC_HOST_ACTION_LOGO: 5439 vhost->job_step(vhost); 5440 break; 5441 case IBMVFC_HOST_ACTION_INIT: 5442 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 5443 if (vhost->delay_init) { 5444 vhost->delay_init = 0; 5445 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5446 ssleep(15); 5447 return; 5448 } else 5449 vhost->job_step(vhost); 5450 break; 5451 case IBMVFC_HOST_ACTION_QUERY: 5452 list_for_each_entry(tgt, &vhost->targets, queue) 5453 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 5454 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 5455 break; 5456 case IBMVFC_HOST_ACTION_QUERY_TGTS: 5457 list_for_each_entry(tgt, &vhost->targets, queue) { 5458 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 5459 tgt->job_step(tgt); 5460 break; 5461 } 5462 } 5463 5464 if (!ibmvfc_dev_init_to_do(vhost)) 5465 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 5466 break; 5467 case IBMVFC_HOST_ACTION_TGT_DEL: 5468 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 5469 list_for_each_entry(tgt, &vhost->targets, queue) { 5470 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { 5471 tgt->job_step(tgt); 5472 break; 5473 } 5474 } 5475 5476 if (ibmvfc_dev_logo_to_do(vhost)) { 5477 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5478 return; 5479 } 5480 5481 list_for_each_entry(tgt, &vhost->targets, queue) { 5482 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 5483 tgt_dbg(tgt, "Deleting rport\n"); 5484 rport = tgt->rport; 5485 tgt->rport = NULL; 5486 list_del(&tgt->queue); 5487 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 5488 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5489 if (rport) 5490 fc_remote_port_delete(rport); 5491 del_timer_sync(&tgt->timer); 5492 kref_put(&tgt->kref, ibmvfc_release_tgt); 5493 return; 5494 } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 5495 tgt_dbg(tgt, "Deleting rport with I/O outstanding\n"); 5496 rport = tgt->rport; 5497 tgt->rport = NULL; 5498 tgt->init_retries = 0; 5499 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); 5500 5501 /* 5502 * If fast fail is enabled, we wait for it to fire and then clean up 5503 * the old port, since we expect the fast fail timer to clean up the 5504 * outstanding I/O faster than waiting for normal command timeouts. 5505 * However, if fast fail is disabled, any I/O outstanding to the 5506 * rport LUNs will stay outstanding indefinitely, since the EH handlers 5507 * won't get invoked for I/O's timing out. If this is a NPIV failover 5508 * scenario, the better alternative is to use the move login. 5509 */ 5510 if (rport && rport->fast_io_fail_tmo == -1) 5511 tgt->move_login = 1; 5512 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5513 if (rport) 5514 fc_remote_port_delete(rport); 5515 return; 5516 } 5517 } 5518 5519 if (vhost->state == IBMVFC_INITIALIZING) { 5520 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 5521 if (vhost->reinit) { 5522 vhost->reinit = 0; 5523 scsi_block_requests(vhost->host); 5524 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 5525 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5526 } else { 5527 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 5528 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 5529 wake_up(&vhost->init_wait_q); 5530 schedule_work(&vhost->rport_add_work_q); 5531 vhost->init_retries = 0; 5532 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5533 scsi_unblock_requests(vhost->host); 5534 } 5535 5536 return; 5537 } else { 5538 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 5539 vhost->job_step = ibmvfc_discover_targets; 5540 } 5541 } else { 5542 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 5543 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5544 scsi_unblock_requests(vhost->host); 5545 wake_up(&vhost->init_wait_q); 5546 return; 5547 } 5548 break; 5549 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 5550 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 5551 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5552 ibmvfc_alloc_targets(vhost); 5553 spin_lock_irqsave(vhost->host->host_lock, flags); 5554 break; 5555 case IBMVFC_HOST_ACTION_TGT_INIT: 5556 list_for_each_entry(tgt, &vhost->targets, queue) { 5557 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 5558 tgt->job_step(tgt); 5559 break; 5560 } 5561 } 5562 5563 if (!ibmvfc_dev_init_to_do(vhost)) 5564 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 5565 break; 5566 default: 5567 break; 5568 } 5569 5570 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5571 } 5572 5573 /** 5574 * ibmvfc_work - Do task level work 5575 * @data: ibmvfc host struct 5576 * 5577 * Returns: 5578 * zero 5579 **/ 5580 static int ibmvfc_work(void *data) 5581 { 5582 struct ibmvfc_host *vhost = data; 5583 int rc; 5584 5585 set_user_nice(current, MIN_NICE); 5586 5587 while (1) { 5588 rc = wait_event_interruptible(vhost->work_wait_q, 5589 ibmvfc_work_to_do(vhost)); 5590 5591 BUG_ON(rc); 5592 5593 if (kthread_should_stop()) 5594 break; 5595 5596 ibmvfc_do_work(vhost); 5597 } 5598 5599 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 5600 return 0; 5601 } 5602 5603 /** 5604 * ibmvfc_alloc_queue - Allocate queue 5605 * @vhost: ibmvfc host struct 5606 * @queue: ibmvfc queue to allocate 5607 * @fmt: queue format to allocate 5608 * 5609 * Returns: 5610 * 0 on success / non-zero on failure 5611 **/ 5612 static int ibmvfc_alloc_queue(struct ibmvfc_host *vhost, 5613 struct ibmvfc_queue *queue, 5614 enum ibmvfc_msg_fmt fmt) 5615 { 5616 struct device *dev = vhost->dev; 5617 size_t fmt_size; 5618 unsigned int pool_size = 0; 5619 5620 ENTER; 5621 spin_lock_init(&queue->_lock); 5622 queue->q_lock = &queue->_lock; 5623 5624 switch (fmt) { 5625 case IBMVFC_CRQ_FMT: 5626 fmt_size = sizeof(*queue->msgs.crq); 5627 pool_size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 5628 break; 5629 case IBMVFC_ASYNC_FMT: 5630 fmt_size = sizeof(*queue->msgs.async); 5631 break; 5632 case IBMVFC_SUB_CRQ_FMT: 5633 fmt_size = sizeof(*queue->msgs.scrq); 5634 /* We need one extra event for Cancel Commands */ 5635 pool_size = max_requests + 1; 5636 break; 5637 default: 5638 dev_warn(dev, "Unknown command/response queue message format: %d\n", fmt); 5639 return -EINVAL; 5640 } 5641 5642 if (ibmvfc_init_event_pool(vhost, queue, pool_size)) { 5643 dev_err(dev, "Couldn't initialize event pool.\n"); 5644 return -ENOMEM; 5645 } 5646 5647 queue->msgs.handle = (void *)get_zeroed_page(GFP_KERNEL); 5648 if (!queue->msgs.handle) 5649 return -ENOMEM; 5650 5651 queue->msg_token = dma_map_single(dev, queue->msgs.handle, PAGE_SIZE, 5652 DMA_BIDIRECTIONAL); 5653 5654 if (dma_mapping_error(dev, queue->msg_token)) { 5655 free_page((unsigned long)queue->msgs.handle); 5656 queue->msgs.handle = NULL; 5657 return -ENOMEM; 5658 } 5659 5660 queue->cur = 0; 5661 queue->fmt = fmt; 5662 queue->size = PAGE_SIZE / fmt_size; 5663 return 0; 5664 } 5665 5666 /** 5667 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 5668 * @vhost: ibmvfc host struct 5669 * 5670 * Allocates a page for messages, maps it for dma, and registers 5671 * the crq with the hypervisor. 5672 * 5673 * Return value: 5674 * zero on success / other on failure 5675 **/ 5676 static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 5677 { 5678 int rc, retrc = -ENOMEM; 5679 struct device *dev = vhost->dev; 5680 struct vio_dev *vdev = to_vio_dev(dev); 5681 struct ibmvfc_queue *crq = &vhost->crq; 5682 5683 ENTER; 5684 if (ibmvfc_alloc_queue(vhost, crq, IBMVFC_CRQ_FMT)) 5685 return -ENOMEM; 5686 5687 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5688 crq->msg_token, PAGE_SIZE); 5689 5690 if (rc == H_RESOURCE) 5691 /* maybe kexecing and resource is busy. try a reset */ 5692 retrc = rc = ibmvfc_reset_crq(vhost); 5693 5694 if (rc == H_CLOSED) 5695 dev_warn(dev, "Partner adapter not ready\n"); 5696 else if (rc) { 5697 dev_warn(dev, "Error %d opening adapter\n", rc); 5698 goto reg_crq_failed; 5699 } 5700 5701 retrc = 0; 5702 5703 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 5704 5705 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 5706 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 5707 goto req_irq_failed; 5708 } 5709 5710 if ((rc = vio_enable_interrupts(vdev))) { 5711 dev_err(dev, "Error %d enabling interrupts\n", rc); 5712 goto req_irq_failed; 5713 } 5714 5715 LEAVE; 5716 return retrc; 5717 5718 req_irq_failed: 5719 tasklet_kill(&vhost->tasklet); 5720 do { 5721 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5722 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5723 reg_crq_failed: 5724 ibmvfc_free_queue(vhost, crq); 5725 return retrc; 5726 } 5727 5728 static int ibmvfc_register_scsi_channel(struct ibmvfc_host *vhost, 5729 int index) 5730 { 5731 struct device *dev = vhost->dev; 5732 struct vio_dev *vdev = to_vio_dev(dev); 5733 struct ibmvfc_queue *scrq = &vhost->scsi_scrqs.scrqs[index]; 5734 int rc = -ENOMEM; 5735 5736 ENTER; 5737 5738 if (ibmvfc_alloc_queue(vhost, scrq, IBMVFC_SUB_CRQ_FMT)) 5739 return -ENOMEM; 5740 5741 rc = h_reg_sub_crq(vdev->unit_address, scrq->msg_token, PAGE_SIZE, 5742 &scrq->cookie, &scrq->hw_irq); 5743 5744 /* H_CLOSED indicates successful register, but no CRQ partner */ 5745 if (rc && rc != H_CLOSED) { 5746 dev_warn(dev, "Error registering sub-crq: %d\n", rc); 5747 if (rc == H_PARAMETER) 5748 dev_warn_once(dev, "Firmware may not support MQ\n"); 5749 goto reg_failed; 5750 } 5751 5752 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 5753 5754 if (!scrq->irq) { 5755 rc = -EINVAL; 5756 dev_err(dev, "Error mapping sub-crq[%d] irq\n", index); 5757 goto irq_failed; 5758 } 5759 5760 snprintf(scrq->name, sizeof(scrq->name), "ibmvfc-%x-scsi%d", 5761 vdev->unit_address, index); 5762 rc = request_irq(scrq->irq, ibmvfc_interrupt_scsi, 0, scrq->name, scrq); 5763 5764 if (rc) { 5765 dev_err(dev, "Couldn't register sub-crq[%d] irq\n", index); 5766 irq_dispose_mapping(scrq->irq); 5767 goto irq_failed; 5768 } 5769 5770 scrq->hwq_id = index; 5771 scrq->vhost = vhost; 5772 5773 LEAVE; 5774 return 0; 5775 5776 irq_failed: 5777 do { 5778 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, scrq->cookie); 5779 } while (rtas_busy_delay(rc)); 5780 reg_failed: 5781 ibmvfc_free_queue(vhost, scrq); 5782 LEAVE; 5783 return rc; 5784 } 5785 5786 static void ibmvfc_deregister_scsi_channel(struct ibmvfc_host *vhost, int index) 5787 { 5788 struct device *dev = vhost->dev; 5789 struct vio_dev *vdev = to_vio_dev(dev); 5790 struct ibmvfc_queue *scrq = &vhost->scsi_scrqs.scrqs[index]; 5791 long rc; 5792 5793 ENTER; 5794 5795 free_irq(scrq->irq, scrq); 5796 irq_dispose_mapping(scrq->irq); 5797 scrq->irq = 0; 5798 5799 do { 5800 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, 5801 scrq->cookie); 5802 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5803 5804 if (rc) 5805 dev_err(dev, "Failed to free sub-crq[%d]: rc=%ld\n", index, rc); 5806 5807 ibmvfc_free_queue(vhost, scrq); 5808 LEAVE; 5809 } 5810 5811 static void ibmvfc_init_sub_crqs(struct ibmvfc_host *vhost) 5812 { 5813 int i, j; 5814 5815 ENTER; 5816 if (!vhost->mq_enabled) 5817 return; 5818 5819 vhost->scsi_scrqs.scrqs = kcalloc(nr_scsi_hw_queues, 5820 sizeof(*vhost->scsi_scrqs.scrqs), 5821 GFP_KERNEL); 5822 if (!vhost->scsi_scrqs.scrqs) { 5823 vhost->do_enquiry = 0; 5824 return; 5825 } 5826 5827 for (i = 0; i < nr_scsi_hw_queues; i++) { 5828 if (ibmvfc_register_scsi_channel(vhost, i)) { 5829 for (j = i; j > 0; j--) 5830 ibmvfc_deregister_scsi_channel(vhost, j - 1); 5831 kfree(vhost->scsi_scrqs.scrqs); 5832 vhost->scsi_scrqs.scrqs = NULL; 5833 vhost->scsi_scrqs.active_queues = 0; 5834 vhost->do_enquiry = 0; 5835 break; 5836 } 5837 } 5838 5839 LEAVE; 5840 } 5841 5842 static void ibmvfc_release_sub_crqs(struct ibmvfc_host *vhost) 5843 { 5844 int i; 5845 5846 ENTER; 5847 if (!vhost->scsi_scrqs.scrqs) 5848 return; 5849 5850 for (i = 0; i < nr_scsi_hw_queues; i++) 5851 ibmvfc_deregister_scsi_channel(vhost, i); 5852 5853 kfree(vhost->scsi_scrqs.scrqs); 5854 vhost->scsi_scrqs.scrqs = NULL; 5855 vhost->scsi_scrqs.active_queues = 0; 5856 LEAVE; 5857 } 5858 5859 /** 5860 * ibmvfc_free_mem - Free memory for vhost 5861 * @vhost: ibmvfc host struct 5862 * 5863 * Return value: 5864 * none 5865 **/ 5866 static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 5867 { 5868 struct ibmvfc_queue *async_q = &vhost->async_crq; 5869 5870 ENTER; 5871 mempool_destroy(vhost->tgt_pool); 5872 kfree(vhost->trace); 5873 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 5874 vhost->disc_buf_dma); 5875 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 5876 vhost->login_buf, vhost->login_buf_dma); 5877 dma_free_coherent(vhost->dev, sizeof(*vhost->channel_setup_buf), 5878 vhost->channel_setup_buf, vhost->channel_setup_dma); 5879 dma_pool_destroy(vhost->sg_pool); 5880 ibmvfc_free_queue(vhost, async_q); 5881 LEAVE; 5882 } 5883 5884 /** 5885 * ibmvfc_alloc_mem - Allocate memory for vhost 5886 * @vhost: ibmvfc host struct 5887 * 5888 * Return value: 5889 * 0 on success / non-zero on failure 5890 **/ 5891 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 5892 { 5893 struct ibmvfc_queue *async_q = &vhost->async_crq; 5894 struct device *dev = vhost->dev; 5895 5896 ENTER; 5897 if (ibmvfc_alloc_queue(vhost, async_q, IBMVFC_ASYNC_FMT)) { 5898 dev_err(dev, "Couldn't allocate/map async queue.\n"); 5899 goto nomem; 5900 } 5901 5902 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 5903 SG_ALL * sizeof(struct srp_direct_buf), 5904 sizeof(struct srp_direct_buf), 0); 5905 5906 if (!vhost->sg_pool) { 5907 dev_err(dev, "Failed to allocate sg pool\n"); 5908 goto unmap_async_crq; 5909 } 5910 5911 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 5912 &vhost->login_buf_dma, GFP_KERNEL); 5913 5914 if (!vhost->login_buf) { 5915 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 5916 goto free_sg_pool; 5917 } 5918 5919 vhost->disc_buf_sz = sizeof(*vhost->disc_buf) * max_targets; 5920 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 5921 &vhost->disc_buf_dma, GFP_KERNEL); 5922 5923 if (!vhost->disc_buf) { 5924 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 5925 goto free_login_buffer; 5926 } 5927 5928 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 5929 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 5930 atomic_set(&vhost->trace_index, -1); 5931 5932 if (!vhost->trace) 5933 goto free_disc_buffer; 5934 5935 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 5936 sizeof(struct ibmvfc_target)); 5937 5938 if (!vhost->tgt_pool) { 5939 dev_err(dev, "Couldn't allocate target memory pool\n"); 5940 goto free_trace; 5941 } 5942 5943 vhost->channel_setup_buf = dma_alloc_coherent(dev, sizeof(*vhost->channel_setup_buf), 5944 &vhost->channel_setup_dma, 5945 GFP_KERNEL); 5946 5947 if (!vhost->channel_setup_buf) { 5948 dev_err(dev, "Couldn't allocate Channel Setup buffer\n"); 5949 goto free_tgt_pool; 5950 } 5951 5952 LEAVE; 5953 return 0; 5954 5955 free_tgt_pool: 5956 mempool_destroy(vhost->tgt_pool); 5957 free_trace: 5958 kfree(vhost->trace); 5959 free_disc_buffer: 5960 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 5961 vhost->disc_buf_dma); 5962 free_login_buffer: 5963 dma_free_coherent(dev, sizeof(*vhost->login_buf), 5964 vhost->login_buf, vhost->login_buf_dma); 5965 free_sg_pool: 5966 dma_pool_destroy(vhost->sg_pool); 5967 unmap_async_crq: 5968 ibmvfc_free_queue(vhost, async_q); 5969 nomem: 5970 LEAVE; 5971 return -ENOMEM; 5972 } 5973 5974 /** 5975 * ibmvfc_rport_add_thread - Worker thread for rport adds 5976 * @work: work struct 5977 * 5978 **/ 5979 static void ibmvfc_rport_add_thread(struct work_struct *work) 5980 { 5981 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 5982 rport_add_work_q); 5983 struct ibmvfc_target *tgt; 5984 struct fc_rport *rport; 5985 unsigned long flags; 5986 int did_work; 5987 5988 ENTER; 5989 spin_lock_irqsave(vhost->host->host_lock, flags); 5990 do { 5991 did_work = 0; 5992 if (vhost->state != IBMVFC_ACTIVE) 5993 break; 5994 5995 list_for_each_entry(tgt, &vhost->targets, queue) { 5996 if (tgt->add_rport) { 5997 did_work = 1; 5998 tgt->add_rport = 0; 5999 kref_get(&tgt->kref); 6000 rport = tgt->rport; 6001 if (!rport) { 6002 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6003 ibmvfc_tgt_add_rport(tgt); 6004 } else if (get_device(&rport->dev)) { 6005 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6006 tgt_dbg(tgt, "Setting rport roles\n"); 6007 fc_remote_port_rolechg(rport, tgt->ids.roles); 6008 put_device(&rport->dev); 6009 } else { 6010 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6011 } 6012 6013 kref_put(&tgt->kref, ibmvfc_release_tgt); 6014 spin_lock_irqsave(vhost->host->host_lock, flags); 6015 break; 6016 } 6017 } 6018 } while(did_work); 6019 6020 if (vhost->state == IBMVFC_ACTIVE) 6021 vhost->scan_complete = 1; 6022 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6023 LEAVE; 6024 } 6025 6026 /** 6027 * ibmvfc_probe - Adapter hot plug add entry point 6028 * @vdev: vio device struct 6029 * @id: vio device id struct 6030 * 6031 * Return value: 6032 * 0 on success / non-zero on failure 6033 **/ 6034 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 6035 { 6036 struct ibmvfc_host *vhost; 6037 struct Scsi_Host *shost; 6038 struct device *dev = &vdev->dev; 6039 int rc = -ENOMEM; 6040 unsigned int max_scsi_queues = IBMVFC_MAX_SCSI_QUEUES; 6041 6042 ENTER; 6043 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 6044 if (!shost) { 6045 dev_err(dev, "Couldn't allocate host data\n"); 6046 goto out; 6047 } 6048 6049 shost->transportt = ibmvfc_transport_template; 6050 shost->can_queue = max_requests; 6051 shost->max_lun = max_lun; 6052 shost->max_id = max_targets; 6053 shost->max_sectors = IBMVFC_MAX_SECTORS; 6054 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 6055 shost->unique_id = shost->host_no; 6056 shost->nr_hw_queues = mq_enabled ? min(max_scsi_queues, nr_scsi_hw_queues) : 1; 6057 6058 vhost = shost_priv(shost); 6059 INIT_LIST_HEAD(&vhost->targets); 6060 INIT_LIST_HEAD(&vhost->purge); 6061 sprintf(vhost->name, IBMVFC_NAME); 6062 vhost->host = shost; 6063 vhost->dev = dev; 6064 vhost->partition_number = -1; 6065 vhost->log_level = log_level; 6066 vhost->task_set = 1; 6067 6068 vhost->mq_enabled = mq_enabled; 6069 vhost->client_scsi_channels = min(shost->nr_hw_queues, nr_scsi_channels); 6070 vhost->using_channels = 0; 6071 vhost->do_enquiry = 1; 6072 6073 strcpy(vhost->partition_name, "UNKNOWN"); 6074 init_waitqueue_head(&vhost->work_wait_q); 6075 init_waitqueue_head(&vhost->init_wait_q); 6076 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 6077 mutex_init(&vhost->passthru_mutex); 6078 6079 if ((rc = ibmvfc_alloc_mem(vhost))) 6080 goto free_scsi_host; 6081 6082 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 6083 shost->host_no); 6084 6085 if (IS_ERR(vhost->work_thread)) { 6086 dev_err(dev, "Couldn't create kernel thread: %ld\n", 6087 PTR_ERR(vhost->work_thread)); 6088 rc = PTR_ERR(vhost->work_thread); 6089 goto free_host_mem; 6090 } 6091 6092 if ((rc = ibmvfc_init_crq(vhost))) { 6093 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 6094 goto kill_kthread; 6095 } 6096 6097 if ((rc = scsi_add_host(shost, dev))) 6098 goto release_crq; 6099 6100 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 6101 6102 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 6103 &ibmvfc_trace_attr))) { 6104 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 6105 goto remove_shost; 6106 } 6107 6108 ibmvfc_init_sub_crqs(vhost); 6109 6110 if (shost_to_fc_host(shost)->rqst_q) 6111 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 6112 dev_set_drvdata(dev, vhost); 6113 spin_lock(&ibmvfc_driver_lock); 6114 list_add_tail(&vhost->queue, &ibmvfc_head); 6115 spin_unlock(&ibmvfc_driver_lock); 6116 6117 ibmvfc_send_crq_init(vhost); 6118 scsi_scan_host(shost); 6119 return 0; 6120 6121 remove_shost: 6122 scsi_remove_host(shost); 6123 release_crq: 6124 ibmvfc_release_crq_queue(vhost); 6125 kill_kthread: 6126 kthread_stop(vhost->work_thread); 6127 free_host_mem: 6128 ibmvfc_free_mem(vhost); 6129 free_scsi_host: 6130 scsi_host_put(shost); 6131 out: 6132 LEAVE; 6133 return rc; 6134 } 6135 6136 /** 6137 * ibmvfc_remove - Adapter hot plug remove entry point 6138 * @vdev: vio device struct 6139 * 6140 * Return value: 6141 * 0 6142 **/ 6143 static void ibmvfc_remove(struct vio_dev *vdev) 6144 { 6145 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 6146 LIST_HEAD(purge); 6147 unsigned long flags; 6148 6149 ENTER; 6150 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 6151 6152 spin_lock_irqsave(vhost->host->host_lock, flags); 6153 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 6154 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6155 6156 ibmvfc_wait_while_resetting(vhost); 6157 kthread_stop(vhost->work_thread); 6158 fc_remove_host(vhost->host); 6159 scsi_remove_host(vhost->host); 6160 6161 spin_lock_irqsave(vhost->host->host_lock, flags); 6162 ibmvfc_purge_requests(vhost, DID_ERROR); 6163 list_splice_init(&vhost->purge, &purge); 6164 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6165 ibmvfc_complete_purge(&purge); 6166 ibmvfc_release_sub_crqs(vhost); 6167 ibmvfc_release_crq_queue(vhost); 6168 6169 ibmvfc_free_mem(vhost); 6170 spin_lock(&ibmvfc_driver_lock); 6171 list_del(&vhost->queue); 6172 spin_unlock(&ibmvfc_driver_lock); 6173 scsi_host_put(vhost->host); 6174 LEAVE; 6175 } 6176 6177 /** 6178 * ibmvfc_resume - Resume from suspend 6179 * @dev: device struct 6180 * 6181 * We may have lost an interrupt across suspend/resume, so kick the 6182 * interrupt handler 6183 * 6184 */ 6185 static int ibmvfc_resume(struct device *dev) 6186 { 6187 unsigned long flags; 6188 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 6189 struct vio_dev *vdev = to_vio_dev(dev); 6190 6191 spin_lock_irqsave(vhost->host->host_lock, flags); 6192 vio_disable_interrupts(vdev); 6193 tasklet_schedule(&vhost->tasklet); 6194 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6195 return 0; 6196 } 6197 6198 /** 6199 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 6200 * @vdev: vio device struct 6201 * 6202 * Return value: 6203 * Number of bytes the driver will need to DMA map at the same time in 6204 * order to perform well. 6205 */ 6206 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 6207 { 6208 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 6209 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 6210 } 6211 6212 static const struct vio_device_id ibmvfc_device_table[] = { 6213 {"fcp", "IBM,vfc-client"}, 6214 { "", "" } 6215 }; 6216 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 6217 6218 static const struct dev_pm_ops ibmvfc_pm_ops = { 6219 .resume = ibmvfc_resume 6220 }; 6221 6222 static struct vio_driver ibmvfc_driver = { 6223 .id_table = ibmvfc_device_table, 6224 .probe = ibmvfc_probe, 6225 .remove = ibmvfc_remove, 6226 .get_desired_dma = ibmvfc_get_desired_dma, 6227 .name = IBMVFC_NAME, 6228 .pm = &ibmvfc_pm_ops, 6229 }; 6230 6231 static struct fc_function_template ibmvfc_transport_functions = { 6232 .show_host_fabric_name = 1, 6233 .show_host_node_name = 1, 6234 .show_host_port_name = 1, 6235 .show_host_supported_classes = 1, 6236 .show_host_port_type = 1, 6237 .show_host_port_id = 1, 6238 .show_host_maxframe_size = 1, 6239 6240 .get_host_port_state = ibmvfc_get_host_port_state, 6241 .show_host_port_state = 1, 6242 6243 .get_host_speed = ibmvfc_get_host_speed, 6244 .show_host_speed = 1, 6245 6246 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 6247 .terminate_rport_io = ibmvfc_terminate_rport_io, 6248 6249 .show_rport_maxframe_size = 1, 6250 .show_rport_supported_classes = 1, 6251 6252 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 6253 .show_rport_dev_loss_tmo = 1, 6254 6255 .get_starget_node_name = ibmvfc_get_starget_node_name, 6256 .show_starget_node_name = 1, 6257 6258 .get_starget_port_name = ibmvfc_get_starget_port_name, 6259 .show_starget_port_name = 1, 6260 6261 .get_starget_port_id = ibmvfc_get_starget_port_id, 6262 .show_starget_port_id = 1, 6263 6264 .bsg_request = ibmvfc_bsg_request, 6265 .bsg_timeout = ibmvfc_bsg_timeout, 6266 }; 6267 6268 /** 6269 * ibmvfc_module_init - Initialize the ibmvfc module 6270 * 6271 * Return value: 6272 * 0 on success / other on failure 6273 **/ 6274 static int __init ibmvfc_module_init(void) 6275 { 6276 int rc; 6277 6278 if (!firmware_has_feature(FW_FEATURE_VIO)) 6279 return -ENODEV; 6280 6281 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 6282 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 6283 6284 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 6285 if (!ibmvfc_transport_template) 6286 return -ENOMEM; 6287 6288 rc = vio_register_driver(&ibmvfc_driver); 6289 if (rc) 6290 fc_release_transport(ibmvfc_transport_template); 6291 return rc; 6292 } 6293 6294 /** 6295 * ibmvfc_module_exit - Teardown the ibmvfc module 6296 * 6297 * Return value: 6298 * nothing 6299 **/ 6300 static void __exit ibmvfc_module_exit(void) 6301 { 6302 vio_unregister_driver(&ibmvfc_driver); 6303 fc_release_transport(ibmvfc_transport_template); 6304 } 6305 6306 module_init(ibmvfc_module_init); 6307 module_exit(ibmvfc_module_exit); 6308