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