1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 4 * 5 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 6 * 7 * Copyright (C) IBM Corporation, 2008 8 */ 9 10 #include <linux/module.h> 11 #include <linux/moduleparam.h> 12 #include <linux/dma-mapping.h> 13 #include <linux/dmapool.h> 14 #include <linux/delay.h> 15 #include <linux/interrupt.h> 16 #include <linux/irqdomain.h> 17 #include <linux/kthread.h> 18 #include <linux/slab.h> 19 #include <linux/of.h> 20 #include <linux/pm.h> 21 #include <linux/stringify.h> 22 #include <linux/bsg-lib.h> 23 #include <asm/firmware.h> 24 #include <asm/irq.h> 25 #include <asm/vio.h> 26 #include <scsi/scsi.h> 27 #include <scsi/scsi_cmnd.h> 28 #include <scsi/scsi_host.h> 29 #include <scsi/scsi_device.h> 30 #include <scsi/scsi_tcq.h> 31 #include <scsi/scsi_transport_fc.h> 32 #include <scsi/scsi_bsg_fc.h> 33 #include "ibmvfc.h" 34 35 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 36 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 37 static u64 max_lun = IBMVFC_MAX_LUN; 38 static unsigned int max_targets = IBMVFC_MAX_TARGETS; 39 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 40 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 41 static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 42 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 43 static unsigned int cls3_error = IBMVFC_CLS3_ERROR; 44 static unsigned int mq_enabled = IBMVFC_MQ; 45 static unsigned int nr_scsi_hw_queues = IBMVFC_SCSI_HW_QUEUES; 46 static unsigned int nr_scsi_channels = IBMVFC_SCSI_CHANNELS; 47 static unsigned int mig_channels_only = IBMVFC_MIG_NO_SUB_TO_CRQ; 48 static unsigned int mig_no_less_channels = IBMVFC_MIG_NO_N_TO_M; 49 50 static LIST_HEAD(ibmvfc_head); 51 static DEFINE_SPINLOCK(ibmvfc_driver_lock); 52 static struct scsi_transport_template *ibmvfc_transport_template; 53 54 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 55 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 56 MODULE_LICENSE("GPL"); 57 MODULE_VERSION(IBMVFC_DRIVER_VERSION); 58 59 module_param_named(mq, mq_enabled, uint, S_IRUGO); 60 MODULE_PARM_DESC(mq, "Enable multiqueue support. " 61 "[Default=" __stringify(IBMVFC_MQ) "]"); 62 module_param_named(scsi_host_queues, nr_scsi_hw_queues, uint, S_IRUGO); 63 MODULE_PARM_DESC(scsi_host_queues, "Number of SCSI Host submission queues. " 64 "[Default=" __stringify(IBMVFC_SCSI_HW_QUEUES) "]"); 65 module_param_named(scsi_hw_channels, nr_scsi_channels, uint, S_IRUGO); 66 MODULE_PARM_DESC(scsi_hw_channels, "Number of hw scsi channels to request. " 67 "[Default=" __stringify(IBMVFC_SCSI_CHANNELS) "]"); 68 module_param_named(mig_channels_only, mig_channels_only, uint, S_IRUGO); 69 MODULE_PARM_DESC(mig_channels_only, "Prevent migration to non-channelized system. " 70 "[Default=" __stringify(IBMVFC_MIG_NO_SUB_TO_CRQ) "]"); 71 module_param_named(mig_no_less_channels, mig_no_less_channels, uint, S_IRUGO); 72 MODULE_PARM_DESC(mig_no_less_channels, "Prevent migration to system with less channels. " 73 "[Default=" __stringify(IBMVFC_MIG_NO_N_TO_M) "]"); 74 75 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 76 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 77 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 78 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 79 MODULE_PARM_DESC(default_timeout, 80 "Default timeout in seconds for initialization and EH commands. " 81 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 82 module_param_named(max_requests, max_requests, uint, S_IRUGO); 83 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 84 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 85 module_param_named(max_lun, max_lun, ullong, S_IRUGO); 86 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 87 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 88 module_param_named(max_targets, max_targets, uint, S_IRUGO); 89 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 90 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 91 module_param_named(disc_threads, disc_threads, uint, S_IRUGO); 92 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 93 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 94 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 95 MODULE_PARM_DESC(debug, "Enable driver debug information. " 96 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 97 module_param_named(log_level, log_level, uint, 0); 98 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 99 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 100 module_param_named(cls3_error, cls3_error, uint, 0); 101 MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. " 102 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]"); 103 104 static const struct { 105 u16 status; 106 u16 error; 107 u8 result; 108 u8 retry; 109 int log; 110 char *name; 111 } cmd_status [] = { 112 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 115 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 116 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 117 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 118 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 119 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 120 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 121 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 122 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 123 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 124 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 125 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 126 127 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 128 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 129 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 130 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 131 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 132 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 133 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 134 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 135 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 136 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 137 138 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 139 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 140 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 141 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 142 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 143 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 144 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 145 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 146 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 147 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 148 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 149 150 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 151 { IBMVFC_FC_SCSI_ERROR, IBMVFC_COMMAND_FAILED, DID_ERROR, 0, 1, "PRLI to device failed." }, 152 }; 153 154 static void ibmvfc_npiv_login(struct ibmvfc_host *); 155 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 156 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 157 static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 158 static void ibmvfc_npiv_logout(struct ibmvfc_host *); 159 static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *); 160 static void ibmvfc_tgt_move_login(struct ibmvfc_target *); 161 162 static void ibmvfc_dereg_sub_crqs(struct ibmvfc_host *); 163 static void ibmvfc_reg_sub_crqs(struct ibmvfc_host *); 164 165 static const char *unknown_error = "unknown error"; 166 167 static long h_reg_sub_crq(unsigned long unit_address, unsigned long ioba, 168 unsigned long length, unsigned long *cookie, 169 unsigned long *irq) 170 { 171 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 172 long rc; 173 174 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, ioba, length); 175 *cookie = retbuf[0]; 176 *irq = retbuf[1]; 177 178 return rc; 179 } 180 181 static int ibmvfc_check_caps(struct ibmvfc_host *vhost, unsigned long cap_flags) 182 { 183 u64 host_caps = be64_to_cpu(vhost->login_buf->resp.capabilities); 184 185 return (host_caps & cap_flags) ? 1 : 0; 186 } 187 188 static struct ibmvfc_fcp_cmd_iu *ibmvfc_get_fcp_iu(struct ibmvfc_host *vhost, 189 struct ibmvfc_cmd *vfc_cmd) 190 { 191 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 192 return &vfc_cmd->v2.iu; 193 else 194 return &vfc_cmd->v1.iu; 195 } 196 197 static struct ibmvfc_fcp_rsp *ibmvfc_get_fcp_rsp(struct ibmvfc_host *vhost, 198 struct ibmvfc_cmd *vfc_cmd) 199 { 200 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 201 return &vfc_cmd->v2.rsp; 202 else 203 return &vfc_cmd->v1.rsp; 204 } 205 206 #ifdef CONFIG_SCSI_IBMVFC_TRACE 207 /** 208 * ibmvfc_trc_start - Log a start trace entry 209 * @evt: ibmvfc event struct 210 * 211 **/ 212 static void ibmvfc_trc_start(struct ibmvfc_event *evt) 213 { 214 struct ibmvfc_host *vhost = evt->vhost; 215 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 216 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 217 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 218 struct ibmvfc_trace_entry *entry; 219 int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK; 220 221 entry = &vhost->trace[index]; 222 entry->evt = evt; 223 entry->time = jiffies; 224 entry->fmt = evt->crq.format; 225 entry->type = IBMVFC_TRC_START; 226 227 switch (entry->fmt) { 228 case IBMVFC_CMD_FORMAT: 229 entry->op_code = iu->cdb[0]; 230 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 231 entry->lun = scsilun_to_int(&iu->lun); 232 entry->tmf_flags = iu->tmf_flags; 233 entry->u.start.xfer_len = be32_to_cpu(iu->xfer_len); 234 break; 235 case IBMVFC_MAD_FORMAT: 236 entry->op_code = be32_to_cpu(mad->opcode); 237 break; 238 default: 239 break; 240 } 241 } 242 243 /** 244 * ibmvfc_trc_end - Log an end trace entry 245 * @evt: ibmvfc event struct 246 * 247 **/ 248 static void ibmvfc_trc_end(struct ibmvfc_event *evt) 249 { 250 struct ibmvfc_host *vhost = evt->vhost; 251 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 252 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 253 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 254 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 255 struct ibmvfc_trace_entry *entry; 256 int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK; 257 258 entry = &vhost->trace[index]; 259 entry->evt = evt; 260 entry->time = jiffies; 261 entry->fmt = evt->crq.format; 262 entry->type = IBMVFC_TRC_END; 263 264 switch (entry->fmt) { 265 case IBMVFC_CMD_FORMAT: 266 entry->op_code = iu->cdb[0]; 267 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 268 entry->lun = scsilun_to_int(&iu->lun); 269 entry->tmf_flags = iu->tmf_flags; 270 entry->u.end.status = be16_to_cpu(vfc_cmd->status); 271 entry->u.end.error = be16_to_cpu(vfc_cmd->error); 272 entry->u.end.fcp_rsp_flags = rsp->flags; 273 entry->u.end.rsp_code = rsp->data.info.rsp_code; 274 entry->u.end.scsi_status = rsp->scsi_status; 275 break; 276 case IBMVFC_MAD_FORMAT: 277 entry->op_code = be32_to_cpu(mad->opcode); 278 entry->u.end.status = be16_to_cpu(mad->status); 279 break; 280 default: 281 break; 282 283 } 284 } 285 286 #else 287 #define ibmvfc_trc_start(evt) do { } while (0) 288 #define ibmvfc_trc_end(evt) do { } while (0) 289 #endif 290 291 /** 292 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 293 * @status: status / error class 294 * @error: error 295 * 296 * Return value: 297 * index into cmd_status / -EINVAL on failure 298 **/ 299 static int ibmvfc_get_err_index(u16 status, u16 error) 300 { 301 int i; 302 303 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 304 if ((cmd_status[i].status & status) == cmd_status[i].status && 305 cmd_status[i].error == error) 306 return i; 307 308 return -EINVAL; 309 } 310 311 /** 312 * ibmvfc_get_cmd_error - Find the error description for the fcp response 313 * @status: status / error class 314 * @error: error 315 * 316 * Return value: 317 * error description string 318 **/ 319 static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 320 { 321 int rc = ibmvfc_get_err_index(status, error); 322 if (rc >= 0) 323 return cmd_status[rc].name; 324 return unknown_error; 325 } 326 327 /** 328 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 329 * @vhost: ibmvfc host struct 330 * @vfc_cmd: ibmvfc command struct 331 * 332 * Return value: 333 * SCSI result value to return for completed command 334 **/ 335 static int ibmvfc_get_err_result(struct ibmvfc_host *vhost, struct ibmvfc_cmd *vfc_cmd) 336 { 337 int err; 338 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 339 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 340 341 if ((rsp->flags & FCP_RSP_LEN_VALID) && 342 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 343 rsp->data.info.rsp_code)) 344 return DID_ERROR << 16; 345 346 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 347 if (err >= 0) 348 return rsp->scsi_status | (cmd_status[err].result << 16); 349 return rsp->scsi_status | (DID_ERROR << 16); 350 } 351 352 /** 353 * ibmvfc_retry_cmd - Determine if error status is retryable 354 * @status: status / error class 355 * @error: error 356 * 357 * Return value: 358 * 1 if error should be retried / 0 if it should not 359 **/ 360 static int ibmvfc_retry_cmd(u16 status, u16 error) 361 { 362 int rc = ibmvfc_get_err_index(status, error); 363 364 if (rc >= 0) 365 return cmd_status[rc].retry; 366 return 1; 367 } 368 369 static const char *unknown_fc_explain = "unknown fc explain"; 370 371 static const struct { 372 u16 fc_explain; 373 char *name; 374 } ls_explain [] = { 375 { 0x00, "no additional explanation" }, 376 { 0x01, "service parameter error - options" }, 377 { 0x03, "service parameter error - initiator control" }, 378 { 0x05, "service parameter error - recipient control" }, 379 { 0x07, "service parameter error - received data field size" }, 380 { 0x09, "service parameter error - concurrent seq" }, 381 { 0x0B, "service parameter error - credit" }, 382 { 0x0D, "invalid N_Port/F_Port_Name" }, 383 { 0x0E, "invalid node/Fabric Name" }, 384 { 0x0F, "invalid common service parameters" }, 385 { 0x11, "invalid association header" }, 386 { 0x13, "association header required" }, 387 { 0x15, "invalid originator S_ID" }, 388 { 0x17, "invalid OX_ID-RX-ID combination" }, 389 { 0x19, "command (request) already in progress" }, 390 { 0x1E, "N_Port Login requested" }, 391 { 0x1F, "Invalid N_Port_ID" }, 392 }; 393 394 static const struct { 395 u16 fc_explain; 396 char *name; 397 } gs_explain [] = { 398 { 0x00, "no additional explanation" }, 399 { 0x01, "port identifier not registered" }, 400 { 0x02, "port name not registered" }, 401 { 0x03, "node name not registered" }, 402 { 0x04, "class of service not registered" }, 403 { 0x06, "initial process associator not registered" }, 404 { 0x07, "FC-4 TYPEs not registered" }, 405 { 0x08, "symbolic port name not registered" }, 406 { 0x09, "symbolic node name not registered" }, 407 { 0x0A, "port type not registered" }, 408 { 0xF0, "authorization exception" }, 409 { 0xF1, "authentication exception" }, 410 { 0xF2, "data base full" }, 411 { 0xF3, "data base empty" }, 412 { 0xF4, "processing request" }, 413 { 0xF5, "unable to verify connection" }, 414 { 0xF6, "devices not in a common zone" }, 415 }; 416 417 /** 418 * ibmvfc_get_ls_explain - Return the FC Explain description text 419 * @status: FC Explain status 420 * 421 * Returns: 422 * error string 423 **/ 424 static const char *ibmvfc_get_ls_explain(u16 status) 425 { 426 int i; 427 428 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 429 if (ls_explain[i].fc_explain == status) 430 return ls_explain[i].name; 431 432 return unknown_fc_explain; 433 } 434 435 /** 436 * ibmvfc_get_gs_explain - Return the FC Explain description text 437 * @status: FC Explain status 438 * 439 * Returns: 440 * error string 441 **/ 442 static const char *ibmvfc_get_gs_explain(u16 status) 443 { 444 int i; 445 446 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 447 if (gs_explain[i].fc_explain == status) 448 return gs_explain[i].name; 449 450 return unknown_fc_explain; 451 } 452 453 static const struct { 454 enum ibmvfc_fc_type fc_type; 455 char *name; 456 } fc_type [] = { 457 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 458 { IBMVFC_PORT_REJECT, "port reject" }, 459 { IBMVFC_LS_REJECT, "ELS reject" }, 460 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 461 { IBMVFC_PORT_BUSY, "port busy" }, 462 { IBMVFC_BASIC_REJECT, "basic reject" }, 463 }; 464 465 static const char *unknown_fc_type = "unknown fc type"; 466 467 /** 468 * ibmvfc_get_fc_type - Return the FC Type description text 469 * @status: FC Type error status 470 * 471 * Returns: 472 * error string 473 **/ 474 static const char *ibmvfc_get_fc_type(u16 status) 475 { 476 int i; 477 478 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 479 if (fc_type[i].fc_type == status) 480 return fc_type[i].name; 481 482 return unknown_fc_type; 483 } 484 485 /** 486 * ibmvfc_set_tgt_action - Set the next init action for the target 487 * @tgt: ibmvfc target struct 488 * @action: action to perform 489 * 490 * Returns: 491 * 0 if action changed / non-zero if not changed 492 **/ 493 static int ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 494 enum ibmvfc_target_action action) 495 { 496 int rc = -EINVAL; 497 498 switch (tgt->action) { 499 case IBMVFC_TGT_ACTION_LOGOUT_RPORT: 500 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT || 501 action == IBMVFC_TGT_ACTION_DEL_RPORT) { 502 tgt->action = action; 503 rc = 0; 504 } 505 break; 506 case IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT: 507 if (action == IBMVFC_TGT_ACTION_DEL_RPORT || 508 action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 509 tgt->action = action; 510 rc = 0; 511 } 512 break; 513 case IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT: 514 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { 515 tgt->action = action; 516 rc = 0; 517 } 518 break; 519 case IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT: 520 if (action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 521 tgt->action = action; 522 rc = 0; 523 } 524 break; 525 case IBMVFC_TGT_ACTION_DEL_RPORT: 526 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 527 tgt->action = action; 528 rc = 0; 529 } 530 break; 531 case IBMVFC_TGT_ACTION_DELETED_RPORT: 532 break; 533 default: 534 tgt->action = action; 535 rc = 0; 536 break; 537 } 538 539 if (action >= IBMVFC_TGT_ACTION_LOGOUT_RPORT) 540 tgt->add_rport = 0; 541 542 return rc; 543 } 544 545 /** 546 * ibmvfc_set_host_state - Set the state for the host 547 * @vhost: ibmvfc host struct 548 * @state: state to set host to 549 * 550 * Returns: 551 * 0 if state changed / non-zero if not changed 552 **/ 553 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 554 enum ibmvfc_host_state state) 555 { 556 int rc = 0; 557 558 switch (vhost->state) { 559 case IBMVFC_HOST_OFFLINE: 560 rc = -EINVAL; 561 break; 562 default: 563 vhost->state = state; 564 break; 565 } 566 567 return rc; 568 } 569 570 /** 571 * ibmvfc_set_host_action - Set the next init action for the host 572 * @vhost: ibmvfc host struct 573 * @action: action to perform 574 * 575 **/ 576 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 577 enum ibmvfc_host_action action) 578 { 579 switch (action) { 580 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 581 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 582 vhost->action = action; 583 break; 584 case IBMVFC_HOST_ACTION_LOGO_WAIT: 585 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 586 vhost->action = action; 587 break; 588 case IBMVFC_HOST_ACTION_INIT_WAIT: 589 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 590 vhost->action = action; 591 break; 592 case IBMVFC_HOST_ACTION_QUERY: 593 switch (vhost->action) { 594 case IBMVFC_HOST_ACTION_INIT_WAIT: 595 case IBMVFC_HOST_ACTION_NONE: 596 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 597 vhost->action = action; 598 break; 599 default: 600 break; 601 } 602 break; 603 case IBMVFC_HOST_ACTION_TGT_INIT: 604 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 605 vhost->action = action; 606 break; 607 case IBMVFC_HOST_ACTION_REENABLE: 608 case IBMVFC_HOST_ACTION_RESET: 609 vhost->action = action; 610 break; 611 case IBMVFC_HOST_ACTION_INIT: 612 case IBMVFC_HOST_ACTION_TGT_DEL: 613 case IBMVFC_HOST_ACTION_LOGO: 614 case IBMVFC_HOST_ACTION_QUERY_TGTS: 615 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 616 case IBMVFC_HOST_ACTION_NONE: 617 default: 618 switch (vhost->action) { 619 case IBMVFC_HOST_ACTION_RESET: 620 case IBMVFC_HOST_ACTION_REENABLE: 621 break; 622 default: 623 vhost->action = action; 624 break; 625 } 626 break; 627 } 628 } 629 630 /** 631 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 632 * @vhost: ibmvfc host struct 633 * 634 * Return value: 635 * nothing 636 **/ 637 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 638 { 639 if (vhost->action == IBMVFC_HOST_ACTION_NONE && 640 vhost->state == IBMVFC_ACTIVE) { 641 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 642 scsi_block_requests(vhost->host); 643 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 644 } 645 } else 646 vhost->reinit = 1; 647 648 wake_up(&vhost->work_wait_q); 649 } 650 651 /** 652 * ibmvfc_del_tgt - Schedule cleanup and removal of the target 653 * @tgt: ibmvfc target struct 654 **/ 655 static void ibmvfc_del_tgt(struct ibmvfc_target *tgt) 656 { 657 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT)) { 658 tgt->job_step = ibmvfc_tgt_implicit_logout_and_del; 659 tgt->init_retries = 0; 660 } 661 wake_up(&tgt->vhost->work_wait_q); 662 } 663 664 /** 665 * ibmvfc_link_down - Handle a link down event from the adapter 666 * @vhost: ibmvfc host struct 667 * @state: ibmvfc host state to enter 668 * 669 **/ 670 static void ibmvfc_link_down(struct ibmvfc_host *vhost, 671 enum ibmvfc_host_state state) 672 { 673 struct ibmvfc_target *tgt; 674 675 ENTER; 676 scsi_block_requests(vhost->host); 677 list_for_each_entry(tgt, &vhost->targets, queue) 678 ibmvfc_del_tgt(tgt); 679 ibmvfc_set_host_state(vhost, state); 680 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 681 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 682 wake_up(&vhost->work_wait_q); 683 LEAVE; 684 } 685 686 /** 687 * ibmvfc_init_host - Start host initialization 688 * @vhost: ibmvfc host struct 689 * 690 * Return value: 691 * nothing 692 **/ 693 static void ibmvfc_init_host(struct ibmvfc_host *vhost) 694 { 695 struct ibmvfc_target *tgt; 696 697 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 698 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 699 dev_err(vhost->dev, 700 "Host initialization retries exceeded. Taking adapter offline\n"); 701 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 702 return; 703 } 704 } 705 706 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 707 memset(vhost->async_crq.msgs.async, 0, PAGE_SIZE); 708 vhost->async_crq.cur = 0; 709 710 list_for_each_entry(tgt, &vhost->targets, queue) { 711 if (vhost->client_migrated) 712 tgt->need_login = 1; 713 else 714 ibmvfc_del_tgt(tgt); 715 } 716 717 scsi_block_requests(vhost->host); 718 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 719 vhost->job_step = ibmvfc_npiv_login; 720 wake_up(&vhost->work_wait_q); 721 } 722 } 723 724 /** 725 * ibmvfc_send_crq - Send a CRQ 726 * @vhost: ibmvfc host struct 727 * @word1: the first 64 bits of the data 728 * @word2: the second 64 bits of the data 729 * 730 * Return value: 731 * 0 on success / other on failure 732 **/ 733 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 734 { 735 struct vio_dev *vdev = to_vio_dev(vhost->dev); 736 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 737 } 738 739 static int ibmvfc_send_sub_crq(struct ibmvfc_host *vhost, u64 cookie, u64 word1, 740 u64 word2, u64 word3, u64 word4) 741 { 742 struct vio_dev *vdev = to_vio_dev(vhost->dev); 743 744 return plpar_hcall_norets(H_SEND_SUB_CRQ, vdev->unit_address, cookie, 745 word1, word2, word3, word4); 746 } 747 748 /** 749 * ibmvfc_send_crq_init - Send a CRQ init message 750 * @vhost: ibmvfc host struct 751 * 752 * Return value: 753 * 0 on success / other on failure 754 **/ 755 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 756 { 757 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 758 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 759 } 760 761 /** 762 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 763 * @vhost: ibmvfc host struct 764 * 765 * Return value: 766 * 0 on success / other on failure 767 **/ 768 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 769 { 770 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 771 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 772 } 773 774 /** 775 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 776 * @vhost: ibmvfc host who owns the event pool 777 * @queue: ibmvfc queue struct 778 * @size: pool size 779 * 780 * Returns zero on success. 781 **/ 782 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost, 783 struct ibmvfc_queue *queue, 784 unsigned int size) 785 { 786 int i; 787 struct ibmvfc_event_pool *pool = &queue->evt_pool; 788 789 ENTER; 790 if (!size) 791 return 0; 792 793 pool->size = size; 794 pool->events = kcalloc(size, sizeof(*pool->events), GFP_KERNEL); 795 if (!pool->events) 796 return -ENOMEM; 797 798 pool->iu_storage = dma_alloc_coherent(vhost->dev, 799 size * sizeof(*pool->iu_storage), 800 &pool->iu_token, 0); 801 802 if (!pool->iu_storage) { 803 kfree(pool->events); 804 return -ENOMEM; 805 } 806 807 INIT_LIST_HEAD(&queue->sent); 808 INIT_LIST_HEAD(&queue->free); 809 spin_lock_init(&queue->l_lock); 810 811 for (i = 0; i < size; ++i) { 812 struct ibmvfc_event *evt = &pool->events[i]; 813 814 /* 815 * evt->active states 816 * 1 = in flight 817 * 0 = being completed 818 * -1 = free/freed 819 */ 820 atomic_set(&evt->active, -1); 821 atomic_set(&evt->free, 1); 822 evt->crq.valid = 0x80; 823 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i)); 824 evt->xfer_iu = pool->iu_storage + i; 825 evt->vhost = vhost; 826 evt->queue = queue; 827 evt->ext_list = NULL; 828 list_add_tail(&evt->queue_list, &queue->free); 829 } 830 831 LEAVE; 832 return 0; 833 } 834 835 /** 836 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 837 * @vhost: ibmvfc host who owns the event pool 838 * @queue: ibmvfc queue struct 839 * 840 **/ 841 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost, 842 struct ibmvfc_queue *queue) 843 { 844 int i; 845 struct ibmvfc_event_pool *pool = &queue->evt_pool; 846 847 ENTER; 848 for (i = 0; i < pool->size; ++i) { 849 list_del(&pool->events[i].queue_list); 850 BUG_ON(atomic_read(&pool->events[i].free) != 1); 851 if (pool->events[i].ext_list) 852 dma_pool_free(vhost->sg_pool, 853 pool->events[i].ext_list, 854 pool->events[i].ext_list_token); 855 } 856 857 kfree(pool->events); 858 dma_free_coherent(vhost->dev, 859 pool->size * sizeof(*pool->iu_storage), 860 pool->iu_storage, pool->iu_token); 861 LEAVE; 862 } 863 864 /** 865 * ibmvfc_free_queue - Deallocate queue 866 * @vhost: ibmvfc host struct 867 * @queue: ibmvfc queue struct 868 * 869 * Unmaps dma and deallocates page for messages 870 **/ 871 static void ibmvfc_free_queue(struct ibmvfc_host *vhost, 872 struct ibmvfc_queue *queue) 873 { 874 struct device *dev = vhost->dev; 875 876 dma_unmap_single(dev, queue->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 877 free_page((unsigned long)queue->msgs.handle); 878 queue->msgs.handle = NULL; 879 880 ibmvfc_free_event_pool(vhost, queue); 881 } 882 883 /** 884 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 885 * @vhost: ibmvfc host struct 886 * 887 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 888 * the crq with the hypervisor. 889 **/ 890 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 891 { 892 long rc = 0; 893 struct vio_dev *vdev = to_vio_dev(vhost->dev); 894 struct ibmvfc_queue *crq = &vhost->crq; 895 896 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 897 free_irq(vdev->irq, vhost); 898 tasklet_kill(&vhost->tasklet); 899 do { 900 if (rc) 901 msleep(100); 902 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 903 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 904 905 vhost->state = IBMVFC_NO_CRQ; 906 vhost->logged_in = 0; 907 908 ibmvfc_free_queue(vhost, crq); 909 } 910 911 /** 912 * ibmvfc_reenable_crq_queue - reenables the CRQ 913 * @vhost: ibmvfc host struct 914 * 915 * Return value: 916 * 0 on success / other on failure 917 **/ 918 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 919 { 920 int rc = 0; 921 struct vio_dev *vdev = to_vio_dev(vhost->dev); 922 unsigned long flags; 923 924 ibmvfc_dereg_sub_crqs(vhost); 925 926 /* Re-enable the CRQ */ 927 do { 928 if (rc) 929 msleep(100); 930 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 931 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 932 933 if (rc) 934 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 935 936 spin_lock_irqsave(vhost->host->host_lock, flags); 937 spin_lock(vhost->crq.q_lock); 938 vhost->do_enquiry = 1; 939 vhost->using_channels = 0; 940 spin_unlock(vhost->crq.q_lock); 941 spin_unlock_irqrestore(vhost->host->host_lock, flags); 942 943 ibmvfc_reg_sub_crqs(vhost); 944 945 return rc; 946 } 947 948 /** 949 * ibmvfc_reset_crq - resets a crq after a failure 950 * @vhost: ibmvfc host struct 951 * 952 * Return value: 953 * 0 on success / other on failure 954 **/ 955 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 956 { 957 int rc = 0; 958 unsigned long flags; 959 struct vio_dev *vdev = to_vio_dev(vhost->dev); 960 struct ibmvfc_queue *crq = &vhost->crq; 961 962 ibmvfc_dereg_sub_crqs(vhost); 963 964 /* Close the CRQ */ 965 do { 966 if (rc) 967 msleep(100); 968 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 969 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 970 971 spin_lock_irqsave(vhost->host->host_lock, flags); 972 spin_lock(vhost->crq.q_lock); 973 vhost->state = IBMVFC_NO_CRQ; 974 vhost->logged_in = 0; 975 vhost->do_enquiry = 1; 976 vhost->using_channels = 0; 977 978 /* Clean out the queue */ 979 memset(crq->msgs.crq, 0, PAGE_SIZE); 980 crq->cur = 0; 981 982 /* And re-open it again */ 983 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 984 crq->msg_token, PAGE_SIZE); 985 986 if (rc == H_CLOSED) 987 /* Adapter is good, but other end is not ready */ 988 dev_warn(vhost->dev, "Partner adapter not ready\n"); 989 else if (rc != 0) 990 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 991 992 spin_unlock(vhost->crq.q_lock); 993 spin_unlock_irqrestore(vhost->host->host_lock, flags); 994 995 ibmvfc_reg_sub_crqs(vhost); 996 997 return rc; 998 } 999 1000 /** 1001 * ibmvfc_valid_event - Determines if event is valid. 1002 * @pool: event_pool that contains the event 1003 * @evt: ibmvfc event to be checked for validity 1004 * 1005 * Return value: 1006 * 1 if event is valid / 0 if event is not valid 1007 **/ 1008 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 1009 struct ibmvfc_event *evt) 1010 { 1011 int index = evt - pool->events; 1012 if (index < 0 || index >= pool->size) /* outside of bounds */ 1013 return 0; 1014 if (evt != pool->events + index) /* unaligned */ 1015 return 0; 1016 return 1; 1017 } 1018 1019 /** 1020 * ibmvfc_free_event - Free the specified event 1021 * @evt: ibmvfc_event to be freed 1022 * 1023 **/ 1024 static void ibmvfc_free_event(struct ibmvfc_event *evt) 1025 { 1026 struct ibmvfc_event_pool *pool = &evt->queue->evt_pool; 1027 unsigned long flags; 1028 1029 BUG_ON(!ibmvfc_valid_event(pool, evt)); 1030 BUG_ON(atomic_inc_return(&evt->free) != 1); 1031 BUG_ON(atomic_dec_and_test(&evt->active)); 1032 1033 spin_lock_irqsave(&evt->queue->l_lock, flags); 1034 list_add_tail(&evt->queue_list, &evt->queue->free); 1035 if (evt->eh_comp) 1036 complete(evt->eh_comp); 1037 spin_unlock_irqrestore(&evt->queue->l_lock, flags); 1038 } 1039 1040 /** 1041 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 1042 * @evt: ibmvfc event struct 1043 * 1044 * This function does not setup any error status, that must be done 1045 * before this function gets called. 1046 **/ 1047 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 1048 { 1049 struct scsi_cmnd *cmnd = evt->cmnd; 1050 1051 if (cmnd) { 1052 scsi_dma_unmap(cmnd); 1053 scsi_done(cmnd); 1054 } 1055 1056 ibmvfc_free_event(evt); 1057 } 1058 1059 /** 1060 * ibmvfc_complete_purge - Complete failed command list 1061 * @purge_list: list head of failed commands 1062 * 1063 * This function runs completions on commands to fail as a result of a 1064 * host reset or platform migration. 1065 **/ 1066 static void ibmvfc_complete_purge(struct list_head *purge_list) 1067 { 1068 struct ibmvfc_event *evt, *pos; 1069 1070 list_for_each_entry_safe(evt, pos, purge_list, queue_list) { 1071 list_del(&evt->queue_list); 1072 ibmvfc_trc_end(evt); 1073 evt->done(evt); 1074 } 1075 } 1076 1077 /** 1078 * ibmvfc_fail_request - Fail request with specified error code 1079 * @evt: ibmvfc event struct 1080 * @error_code: error code to fail request with 1081 * 1082 * Return value: 1083 * none 1084 **/ 1085 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 1086 { 1087 /* 1088 * Anything we are failing should still be active. Otherwise, it 1089 * implies we already got a response for the command and are doing 1090 * something bad like double completing it. 1091 */ 1092 BUG_ON(!atomic_dec_and_test(&evt->active)); 1093 if (evt->cmnd) { 1094 evt->cmnd->result = (error_code << 16); 1095 evt->done = ibmvfc_scsi_eh_done; 1096 } else 1097 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED); 1098 1099 del_timer(&evt->timer); 1100 } 1101 1102 /** 1103 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 1104 * @vhost: ibmvfc host struct 1105 * @error_code: error code to fail requests with 1106 * 1107 * Return value: 1108 * none 1109 **/ 1110 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 1111 { 1112 struct ibmvfc_event *evt, *pos; 1113 struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; 1114 unsigned long flags; 1115 int hwqs = 0; 1116 int i; 1117 1118 if (vhost->using_channels) 1119 hwqs = vhost->scsi_scrqs.active_queues; 1120 1121 ibmvfc_dbg(vhost, "Purging all requests\n"); 1122 spin_lock_irqsave(&vhost->crq.l_lock, flags); 1123 list_for_each_entry_safe(evt, pos, &vhost->crq.sent, queue_list) 1124 ibmvfc_fail_request(evt, error_code); 1125 list_splice_init(&vhost->crq.sent, &vhost->purge); 1126 spin_unlock_irqrestore(&vhost->crq.l_lock, flags); 1127 1128 for (i = 0; i < hwqs; i++) { 1129 spin_lock_irqsave(queues[i].q_lock, flags); 1130 spin_lock(&queues[i].l_lock); 1131 list_for_each_entry_safe(evt, pos, &queues[i].sent, queue_list) 1132 ibmvfc_fail_request(evt, error_code); 1133 list_splice_init(&queues[i].sent, &vhost->purge); 1134 spin_unlock(&queues[i].l_lock); 1135 spin_unlock_irqrestore(queues[i].q_lock, flags); 1136 } 1137 } 1138 1139 /** 1140 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 1141 * @vhost: struct ibmvfc host to reset 1142 **/ 1143 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 1144 { 1145 ibmvfc_purge_requests(vhost, DID_ERROR); 1146 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 1147 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 1148 } 1149 1150 /** 1151 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 1152 * @vhost: struct ibmvfc host to reset 1153 **/ 1154 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 1155 { 1156 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 1157 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 1158 scsi_block_requests(vhost->host); 1159 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 1160 vhost->job_step = ibmvfc_npiv_logout; 1161 wake_up(&vhost->work_wait_q); 1162 } else 1163 ibmvfc_hard_reset_host(vhost); 1164 } 1165 1166 /** 1167 * ibmvfc_reset_host - Reset the connection to the server 1168 * @vhost: ibmvfc host struct 1169 **/ 1170 static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 1171 { 1172 unsigned long flags; 1173 1174 spin_lock_irqsave(vhost->host->host_lock, flags); 1175 __ibmvfc_reset_host(vhost); 1176 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1177 } 1178 1179 /** 1180 * ibmvfc_retry_host_init - Retry host initialization if allowed 1181 * @vhost: ibmvfc host struct 1182 * 1183 * Returns: 1 if init will be retried / 0 if not 1184 * 1185 **/ 1186 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 1187 { 1188 int retry = 0; 1189 1190 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 1191 vhost->delay_init = 1; 1192 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 1193 dev_err(vhost->dev, 1194 "Host initialization retries exceeded. Taking adapter offline\n"); 1195 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 1196 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 1197 __ibmvfc_reset_host(vhost); 1198 else { 1199 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 1200 retry = 1; 1201 } 1202 } 1203 1204 wake_up(&vhost->work_wait_q); 1205 return retry; 1206 } 1207 1208 /** 1209 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 1210 * @starget: scsi target struct 1211 * 1212 * Return value: 1213 * ibmvfc_target struct / NULL if not found 1214 **/ 1215 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 1216 { 1217 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 1218 struct ibmvfc_host *vhost = shost_priv(shost); 1219 struct ibmvfc_target *tgt; 1220 1221 list_for_each_entry(tgt, &vhost->targets, queue) 1222 if (tgt->target_id == starget->id) { 1223 kref_get(&tgt->kref); 1224 return tgt; 1225 } 1226 return NULL; 1227 } 1228 1229 /** 1230 * ibmvfc_get_target - Find the specified scsi_target 1231 * @starget: scsi target struct 1232 * 1233 * Return value: 1234 * ibmvfc_target struct / NULL if not found 1235 **/ 1236 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 1237 { 1238 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 1239 struct ibmvfc_target *tgt; 1240 unsigned long flags; 1241 1242 spin_lock_irqsave(shost->host_lock, flags); 1243 tgt = __ibmvfc_get_target(starget); 1244 spin_unlock_irqrestore(shost->host_lock, flags); 1245 return tgt; 1246 } 1247 1248 /** 1249 * ibmvfc_get_host_speed - Get host port speed 1250 * @shost: scsi host struct 1251 * 1252 * Return value: 1253 * none 1254 **/ 1255 static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 1256 { 1257 struct ibmvfc_host *vhost = shost_priv(shost); 1258 unsigned long flags; 1259 1260 spin_lock_irqsave(shost->host_lock, flags); 1261 if (vhost->state == IBMVFC_ACTIVE) { 1262 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) { 1263 case 1: 1264 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 1265 break; 1266 case 2: 1267 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 1268 break; 1269 case 4: 1270 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 1271 break; 1272 case 8: 1273 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 1274 break; 1275 case 10: 1276 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 1277 break; 1278 case 16: 1279 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 1280 break; 1281 default: 1282 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 1283 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100); 1284 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 1285 break; 1286 } 1287 } else 1288 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 1289 spin_unlock_irqrestore(shost->host_lock, flags); 1290 } 1291 1292 /** 1293 * ibmvfc_get_host_port_state - Get host port state 1294 * @shost: scsi host struct 1295 * 1296 * Return value: 1297 * none 1298 **/ 1299 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 1300 { 1301 struct ibmvfc_host *vhost = shost_priv(shost); 1302 unsigned long flags; 1303 1304 spin_lock_irqsave(shost->host_lock, flags); 1305 switch (vhost->state) { 1306 case IBMVFC_INITIALIZING: 1307 case IBMVFC_ACTIVE: 1308 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 1309 break; 1310 case IBMVFC_LINK_DOWN: 1311 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 1312 break; 1313 case IBMVFC_LINK_DEAD: 1314 case IBMVFC_HOST_OFFLINE: 1315 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1316 break; 1317 case IBMVFC_HALTED: 1318 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1319 break; 1320 case IBMVFC_NO_CRQ: 1321 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1322 break; 1323 default: 1324 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1325 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1326 break; 1327 } 1328 spin_unlock_irqrestore(shost->host_lock, flags); 1329 } 1330 1331 /** 1332 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1333 * @rport: rport struct 1334 * @timeout: timeout value 1335 * 1336 * Return value: 1337 * none 1338 **/ 1339 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1340 { 1341 if (timeout) 1342 rport->dev_loss_tmo = timeout; 1343 else 1344 rport->dev_loss_tmo = 1; 1345 } 1346 1347 /** 1348 * ibmvfc_release_tgt - Free memory allocated for a target 1349 * @kref: kref struct 1350 * 1351 **/ 1352 static void ibmvfc_release_tgt(struct kref *kref) 1353 { 1354 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1355 kfree(tgt); 1356 } 1357 1358 /** 1359 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1360 * @starget: scsi target struct 1361 * 1362 * Return value: 1363 * none 1364 **/ 1365 static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1366 { 1367 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1368 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1369 if (tgt) 1370 kref_put(&tgt->kref, ibmvfc_release_tgt); 1371 } 1372 1373 /** 1374 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1375 * @starget: scsi target struct 1376 * 1377 * Return value: 1378 * none 1379 **/ 1380 static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1381 { 1382 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1383 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1384 if (tgt) 1385 kref_put(&tgt->kref, ibmvfc_release_tgt); 1386 } 1387 1388 /** 1389 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1390 * @starget: scsi target struct 1391 * 1392 * Return value: 1393 * none 1394 **/ 1395 static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1396 { 1397 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1398 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1399 if (tgt) 1400 kref_put(&tgt->kref, ibmvfc_release_tgt); 1401 } 1402 1403 /** 1404 * ibmvfc_wait_while_resetting - Wait while the host resets 1405 * @vhost: ibmvfc host struct 1406 * 1407 * Return value: 1408 * 0 on success / other on failure 1409 **/ 1410 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1411 { 1412 long timeout = wait_event_timeout(vhost->init_wait_q, 1413 ((vhost->state == IBMVFC_ACTIVE || 1414 vhost->state == IBMVFC_HOST_OFFLINE || 1415 vhost->state == IBMVFC_LINK_DEAD) && 1416 vhost->action == IBMVFC_HOST_ACTION_NONE), 1417 (init_timeout * HZ)); 1418 1419 return timeout ? 0 : -EIO; 1420 } 1421 1422 /** 1423 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1424 * @shost: scsi host struct 1425 * 1426 * Return value: 1427 * 0 on success / other on failure 1428 **/ 1429 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1430 { 1431 struct ibmvfc_host *vhost = shost_priv(shost); 1432 1433 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1434 ibmvfc_reset_host(vhost); 1435 return ibmvfc_wait_while_resetting(vhost); 1436 } 1437 1438 /** 1439 * ibmvfc_gather_partition_info - Gather info about the LPAR 1440 * @vhost: ibmvfc host struct 1441 * 1442 * Return value: 1443 * none 1444 **/ 1445 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1446 { 1447 struct device_node *rootdn; 1448 const char *name; 1449 const unsigned int *num; 1450 1451 rootdn = of_find_node_by_path("/"); 1452 if (!rootdn) 1453 return; 1454 1455 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1456 if (name) 1457 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1458 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1459 if (num) 1460 vhost->partition_number = *num; 1461 of_node_put(rootdn); 1462 } 1463 1464 /** 1465 * ibmvfc_set_login_info - Setup info for NPIV login 1466 * @vhost: ibmvfc host struct 1467 * 1468 * Return value: 1469 * none 1470 **/ 1471 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1472 { 1473 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1474 struct ibmvfc_queue *async_crq = &vhost->async_crq; 1475 struct device_node *of_node = vhost->dev->of_node; 1476 const char *location; 1477 1478 memset(login_info, 0, sizeof(*login_info)); 1479 1480 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX); 1481 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); 1482 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); 1483 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); 1484 login_info->partition_num = cpu_to_be32(vhost->partition_number); 1485 login_info->vfc_frame_version = cpu_to_be32(1); 1486 login_info->fcp_version = cpu_to_be16(3); 1487 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); 1488 if (vhost->client_migrated) 1489 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); 1490 1491 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ); 1492 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE | IBMVFC_CAN_SEND_VF_WWPN); 1493 1494 if (vhost->mq_enabled || vhost->using_channels) 1495 login_info->capabilities |= cpu_to_be64(IBMVFC_CAN_USE_CHANNELS); 1496 1497 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); 1498 login_info->async.len = cpu_to_be32(async_crq->size * 1499 sizeof(*async_crq->msgs.async)); 1500 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1501 strncpy(login_info->device_name, 1502 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1503 1504 location = of_get_property(of_node, "ibm,loc-code", NULL); 1505 location = location ? location : dev_name(vhost->dev); 1506 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1507 } 1508 1509 /** 1510 * ibmvfc_get_event - Gets the next free event in pool 1511 * @queue: ibmvfc queue struct 1512 * 1513 * Returns a free event from the pool. 1514 **/ 1515 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_queue *queue) 1516 { 1517 struct ibmvfc_event *evt; 1518 unsigned long flags; 1519 1520 spin_lock_irqsave(&queue->l_lock, flags); 1521 if (list_empty(&queue->free)) { 1522 ibmvfc_log(queue->vhost, 4, "empty event pool on queue:%ld\n", queue->hwq_id); 1523 spin_unlock_irqrestore(&queue->l_lock, flags); 1524 return NULL; 1525 } 1526 evt = list_entry(queue->free.next, struct ibmvfc_event, queue_list); 1527 atomic_set(&evt->free, 0); 1528 list_del(&evt->queue_list); 1529 spin_unlock_irqrestore(&queue->l_lock, flags); 1530 return evt; 1531 } 1532 1533 /** 1534 * ibmvfc_locked_done - Calls evt completion with host_lock held 1535 * @evt: ibmvfc evt to complete 1536 * 1537 * All non-scsi command completion callbacks have the expectation that the 1538 * host_lock is held. This callback is used by ibmvfc_init_event to wrap a 1539 * MAD evt with the host_lock. 1540 **/ 1541 static void ibmvfc_locked_done(struct ibmvfc_event *evt) 1542 { 1543 unsigned long flags; 1544 1545 spin_lock_irqsave(evt->vhost->host->host_lock, flags); 1546 evt->_done(evt); 1547 spin_unlock_irqrestore(evt->vhost->host->host_lock, flags); 1548 } 1549 1550 /** 1551 * ibmvfc_init_event - Initialize fields in an event struct that are always 1552 * required. 1553 * @evt: The event 1554 * @done: Routine to call when the event is responded to 1555 * @format: SRP or MAD format 1556 **/ 1557 static void ibmvfc_init_event(struct ibmvfc_event *evt, 1558 void (*done) (struct ibmvfc_event *), u8 format) 1559 { 1560 evt->cmnd = NULL; 1561 evt->sync_iu = NULL; 1562 evt->eh_comp = NULL; 1563 evt->crq.format = format; 1564 if (format == IBMVFC_CMD_FORMAT) 1565 evt->done = done; 1566 else { 1567 evt->_done = done; 1568 evt->done = ibmvfc_locked_done; 1569 } 1570 evt->hwq = 0; 1571 } 1572 1573 /** 1574 * ibmvfc_map_sg_list - Initialize scatterlist 1575 * @scmd: scsi command struct 1576 * @nseg: number of scatterlist segments 1577 * @md: memory descriptor list to initialize 1578 **/ 1579 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1580 struct srp_direct_buf *md) 1581 { 1582 int i; 1583 struct scatterlist *sg; 1584 1585 scsi_for_each_sg(scmd, sg, nseg, i) { 1586 md[i].va = cpu_to_be64(sg_dma_address(sg)); 1587 md[i].len = cpu_to_be32(sg_dma_len(sg)); 1588 md[i].key = 0; 1589 } 1590 } 1591 1592 /** 1593 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes descriptor fields 1594 * @scmd: struct scsi_cmnd with the scatterlist 1595 * @evt: ibmvfc event struct 1596 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1597 * @dev: device for which to map dma memory 1598 * 1599 * Returns: 1600 * 0 on success / non-zero on failure 1601 **/ 1602 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1603 struct ibmvfc_event *evt, 1604 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1605 { 1606 1607 int sg_mapped; 1608 struct srp_direct_buf *data = &vfc_cmd->ioba; 1609 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1610 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(evt->vhost, vfc_cmd); 1611 1612 if (cls3_error) 1613 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR); 1614 1615 sg_mapped = scsi_dma_map(scmd); 1616 if (!sg_mapped) { 1617 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC); 1618 return 0; 1619 } else if (unlikely(sg_mapped < 0)) { 1620 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1621 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1622 return sg_mapped; 1623 } 1624 1625 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1626 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE); 1627 iu->add_cdb_len |= IBMVFC_WRDATA; 1628 } else { 1629 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ); 1630 iu->add_cdb_len |= IBMVFC_RDDATA; 1631 } 1632 1633 if (sg_mapped == 1) { 1634 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1635 return 0; 1636 } 1637 1638 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST); 1639 1640 if (!evt->ext_list) { 1641 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1642 &evt->ext_list_token); 1643 1644 if (!evt->ext_list) { 1645 scsi_dma_unmap(scmd); 1646 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1647 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1648 return -ENOMEM; 1649 } 1650 } 1651 1652 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1653 1654 data->va = cpu_to_be64(evt->ext_list_token); 1655 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf)); 1656 data->key = 0; 1657 return 0; 1658 } 1659 1660 /** 1661 * ibmvfc_timeout - Internal command timeout handler 1662 * @t: struct ibmvfc_event that timed out 1663 * 1664 * Called when an internally generated command times out 1665 **/ 1666 static void ibmvfc_timeout(struct timer_list *t) 1667 { 1668 struct ibmvfc_event *evt = from_timer(evt, t, timer); 1669 struct ibmvfc_host *vhost = evt->vhost; 1670 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1671 ibmvfc_reset_host(vhost); 1672 } 1673 1674 /** 1675 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1676 * @evt: event to be sent 1677 * @vhost: ibmvfc host struct 1678 * @timeout: timeout in seconds - 0 means do not time command 1679 * 1680 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1681 **/ 1682 static int ibmvfc_send_event(struct ibmvfc_event *evt, 1683 struct ibmvfc_host *vhost, unsigned long timeout) 1684 { 1685 __be64 *crq_as_u64 = (__be64 *) &evt->crq; 1686 unsigned long flags; 1687 int rc; 1688 1689 /* Copy the IU into the transfer area */ 1690 *evt->xfer_iu = evt->iu; 1691 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1692 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); 1693 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1694 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); 1695 else 1696 BUG(); 1697 1698 timer_setup(&evt->timer, ibmvfc_timeout, 0); 1699 1700 if (timeout) { 1701 evt->timer.expires = jiffies + (timeout * HZ); 1702 add_timer(&evt->timer); 1703 } 1704 1705 spin_lock_irqsave(&evt->queue->l_lock, flags); 1706 list_add_tail(&evt->queue_list, &evt->queue->sent); 1707 atomic_set(&evt->active, 1); 1708 1709 mb(); 1710 1711 if (evt->queue->fmt == IBMVFC_SUB_CRQ_FMT) 1712 rc = ibmvfc_send_sub_crq(vhost, 1713 evt->queue->vios_cookie, 1714 be64_to_cpu(crq_as_u64[0]), 1715 be64_to_cpu(crq_as_u64[1]), 1716 0, 0); 1717 else 1718 rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), 1719 be64_to_cpu(crq_as_u64[1])); 1720 1721 if (rc) { 1722 atomic_set(&evt->active, 0); 1723 list_del(&evt->queue_list); 1724 spin_unlock_irqrestore(&evt->queue->l_lock, flags); 1725 del_timer(&evt->timer); 1726 1727 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1728 * Firmware will send a CRQ with a transport event (0xFF) to 1729 * tell this client what has happened to the transport. This 1730 * will be handled in ibmvfc_handle_crq() 1731 */ 1732 if (rc == H_CLOSED) { 1733 if (printk_ratelimit()) 1734 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1735 if (evt->cmnd) 1736 scsi_dma_unmap(evt->cmnd); 1737 ibmvfc_free_event(evt); 1738 return SCSI_MLQUEUE_HOST_BUSY; 1739 } 1740 1741 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1742 if (evt->cmnd) { 1743 evt->cmnd->result = DID_ERROR << 16; 1744 evt->done = ibmvfc_scsi_eh_done; 1745 } else 1746 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); 1747 1748 evt->done(evt); 1749 } else { 1750 spin_unlock_irqrestore(&evt->queue->l_lock, flags); 1751 ibmvfc_trc_start(evt); 1752 } 1753 1754 return 0; 1755 } 1756 1757 /** 1758 * ibmvfc_log_error - Log an error for the failed command if appropriate 1759 * @evt: ibmvfc event to log 1760 * 1761 **/ 1762 static void ibmvfc_log_error(struct ibmvfc_event *evt) 1763 { 1764 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1765 struct ibmvfc_host *vhost = evt->vhost; 1766 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 1767 struct scsi_cmnd *cmnd = evt->cmnd; 1768 const char *err = unknown_error; 1769 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 1770 int logerr = 0; 1771 int rsp_code = 0; 1772 1773 if (index >= 0) { 1774 logerr = cmd_status[index].log; 1775 err = cmd_status[index].name; 1776 } 1777 1778 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1779 return; 1780 1781 if (rsp->flags & FCP_RSP_LEN_VALID) 1782 rsp_code = rsp->data.info.rsp_code; 1783 1784 scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) " 1785 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1786 cmnd->cmnd[0], err, be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error), 1787 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1788 } 1789 1790 /** 1791 * ibmvfc_relogin - Log back into the specified device 1792 * @sdev: scsi device struct 1793 * 1794 **/ 1795 static void ibmvfc_relogin(struct scsi_device *sdev) 1796 { 1797 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1798 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1799 struct ibmvfc_target *tgt; 1800 unsigned long flags; 1801 1802 spin_lock_irqsave(vhost->host->host_lock, flags); 1803 list_for_each_entry(tgt, &vhost->targets, queue) { 1804 if (rport == tgt->rport) { 1805 ibmvfc_del_tgt(tgt); 1806 break; 1807 } 1808 } 1809 1810 ibmvfc_reinit_host(vhost); 1811 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1812 } 1813 1814 /** 1815 * ibmvfc_scsi_done - Handle responses from commands 1816 * @evt: ibmvfc event to be handled 1817 * 1818 * Used as a callback when sending scsi cmds. 1819 **/ 1820 static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1821 { 1822 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1823 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(evt->vhost, vfc_cmd); 1824 struct scsi_cmnd *cmnd = evt->cmnd; 1825 u32 rsp_len = 0; 1826 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); 1827 1828 if (cmnd) { 1829 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) 1830 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); 1831 else if (rsp->flags & FCP_RESID_UNDER) 1832 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); 1833 else 1834 scsi_set_resid(cmnd, 0); 1835 1836 if (vfc_cmd->status) { 1837 cmnd->result = ibmvfc_get_err_result(evt->vhost, vfc_cmd); 1838 1839 if (rsp->flags & FCP_RSP_LEN_VALID) 1840 rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 1841 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1842 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1843 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1844 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1845 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && 1846 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) 1847 ibmvfc_relogin(cmnd->device); 1848 1849 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1850 cmnd->result = (DID_ERROR << 16); 1851 1852 ibmvfc_log_error(evt); 1853 } 1854 1855 if (!cmnd->result && 1856 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1857 cmnd->result = (DID_ERROR << 16); 1858 1859 scsi_dma_unmap(cmnd); 1860 scsi_done(cmnd); 1861 } 1862 1863 ibmvfc_free_event(evt); 1864 } 1865 1866 /** 1867 * ibmvfc_host_chkready - Check if the host can accept commands 1868 * @vhost: struct ibmvfc host 1869 * 1870 * Returns: 1871 * 1 if host can accept command / 0 if not 1872 **/ 1873 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1874 { 1875 int result = 0; 1876 1877 switch (vhost->state) { 1878 case IBMVFC_LINK_DEAD: 1879 case IBMVFC_HOST_OFFLINE: 1880 result = DID_NO_CONNECT << 16; 1881 break; 1882 case IBMVFC_NO_CRQ: 1883 case IBMVFC_INITIALIZING: 1884 case IBMVFC_HALTED: 1885 case IBMVFC_LINK_DOWN: 1886 result = DID_REQUEUE << 16; 1887 break; 1888 case IBMVFC_ACTIVE: 1889 result = 0; 1890 break; 1891 } 1892 1893 return result; 1894 } 1895 1896 static struct ibmvfc_cmd *ibmvfc_init_vfc_cmd(struct ibmvfc_event *evt, struct scsi_device *sdev) 1897 { 1898 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1899 struct ibmvfc_host *vhost = evt->vhost; 1900 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 1901 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 1902 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 1903 size_t offset; 1904 1905 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1906 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 1907 offset = offsetof(struct ibmvfc_cmd, v2.rsp); 1908 vfc_cmd->target_wwpn = cpu_to_be64(rport->port_name); 1909 } else 1910 offset = offsetof(struct ibmvfc_cmd, v1.rsp); 1911 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offset); 1912 vfc_cmd->resp.len = cpu_to_be32(sizeof(*rsp)); 1913 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1914 vfc_cmd->payload_len = cpu_to_be32(sizeof(*iu)); 1915 vfc_cmd->resp_len = cpu_to_be32(sizeof(*rsp)); 1916 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 1917 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); 1918 int_to_scsilun(sdev->lun, &iu->lun); 1919 1920 return vfc_cmd; 1921 } 1922 1923 /** 1924 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1925 * @shost: scsi host struct 1926 * @cmnd: struct scsi_cmnd to be executed 1927 * 1928 * Returns: 1929 * 0 on success / other on failure 1930 **/ 1931 static int ibmvfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) 1932 { 1933 struct ibmvfc_host *vhost = shost_priv(shost); 1934 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1935 struct ibmvfc_cmd *vfc_cmd; 1936 struct ibmvfc_fcp_cmd_iu *iu; 1937 struct ibmvfc_event *evt; 1938 u32 tag_and_hwq = blk_mq_unique_tag(scsi_cmd_to_rq(cmnd)); 1939 u16 hwq = blk_mq_unique_tag_to_hwq(tag_and_hwq); 1940 u16 scsi_channel; 1941 int rc; 1942 1943 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1944 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1945 cmnd->result = rc; 1946 scsi_done(cmnd); 1947 return 0; 1948 } 1949 1950 cmnd->result = (DID_OK << 16); 1951 if (vhost->using_channels) { 1952 scsi_channel = hwq % vhost->scsi_scrqs.active_queues; 1953 evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[scsi_channel]); 1954 if (!evt) 1955 return SCSI_MLQUEUE_HOST_BUSY; 1956 1957 evt->hwq = hwq % vhost->scsi_scrqs.active_queues; 1958 } else { 1959 evt = ibmvfc_get_event(&vhost->crq); 1960 if (!evt) 1961 return SCSI_MLQUEUE_HOST_BUSY; 1962 } 1963 1964 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1965 evt->cmnd = cmnd; 1966 1967 vfc_cmd = ibmvfc_init_vfc_cmd(evt, cmnd->device); 1968 iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 1969 1970 iu->xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); 1971 memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); 1972 1973 if (cmnd->flags & SCMD_TAGGED) { 1974 vfc_cmd->task_tag = cpu_to_be64(scsi_cmd_to_rq(cmnd)->tag); 1975 iu->pri_task_attr = IBMVFC_SIMPLE_TASK; 1976 } 1977 1978 vfc_cmd->correlation = cpu_to_be64((u64)evt); 1979 1980 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1981 return ibmvfc_send_event(evt, vhost, 0); 1982 1983 ibmvfc_free_event(evt); 1984 if (rc == -ENOMEM) 1985 return SCSI_MLQUEUE_HOST_BUSY; 1986 1987 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1988 scmd_printk(KERN_ERR, cmnd, 1989 "Failed to map DMA buffer for command. rc=%d\n", rc); 1990 1991 cmnd->result = DID_ERROR << 16; 1992 scsi_done(cmnd); 1993 return 0; 1994 } 1995 1996 /** 1997 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1998 * @evt: ibmvfc event struct 1999 * 2000 **/ 2001 static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 2002 { 2003 /* copy the response back */ 2004 if (evt->sync_iu) 2005 *evt->sync_iu = *evt->xfer_iu; 2006 2007 complete(&evt->comp); 2008 } 2009 2010 /** 2011 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 2012 * @evt: struct ibmvfc_event 2013 * 2014 **/ 2015 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 2016 { 2017 struct ibmvfc_host *vhost = evt->vhost; 2018 2019 ibmvfc_free_event(evt); 2020 vhost->aborting_passthru = 0; 2021 dev_info(vhost->dev, "Passthru command cancelled\n"); 2022 } 2023 2024 /** 2025 * ibmvfc_bsg_timeout - Handle a BSG timeout 2026 * @job: struct bsg_job that timed out 2027 * 2028 * Returns: 2029 * 0 on success / other on failure 2030 **/ 2031 static int ibmvfc_bsg_timeout(struct bsg_job *job) 2032 { 2033 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 2034 unsigned long port_id = (unsigned long)job->dd_data; 2035 struct ibmvfc_event *evt; 2036 struct ibmvfc_tmf *tmf; 2037 unsigned long flags; 2038 int rc; 2039 2040 ENTER; 2041 spin_lock_irqsave(vhost->host->host_lock, flags); 2042 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 2043 __ibmvfc_reset_host(vhost); 2044 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2045 return 0; 2046 } 2047 2048 vhost->aborting_passthru = 1; 2049 evt = ibmvfc_get_event(&vhost->crq); 2050 if (!evt) { 2051 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2052 return -ENOMEM; 2053 } 2054 2055 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 2056 2057 tmf = &evt->iu.tmf; 2058 memset(tmf, 0, sizeof(*tmf)); 2059 tmf->common.version = cpu_to_be32(1); 2060 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2061 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2062 tmf->scsi_id = cpu_to_be64(port_id); 2063 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 2064 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); 2065 rc = ibmvfc_send_event(evt, vhost, default_timeout); 2066 2067 if (rc != 0) { 2068 vhost->aborting_passthru = 0; 2069 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 2070 rc = -EIO; 2071 } else 2072 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 2073 port_id); 2074 2075 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2076 2077 LEAVE; 2078 return rc; 2079 } 2080 2081 /** 2082 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 2083 * @vhost: struct ibmvfc_host to send command 2084 * @port_id: port ID to send command 2085 * 2086 * Returns: 2087 * 0 on success / other on failure 2088 **/ 2089 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 2090 { 2091 struct ibmvfc_port_login *plogi; 2092 struct ibmvfc_target *tgt; 2093 struct ibmvfc_event *evt; 2094 union ibmvfc_iu rsp_iu; 2095 unsigned long flags; 2096 int rc = 0, issue_login = 1; 2097 2098 ENTER; 2099 spin_lock_irqsave(vhost->host->host_lock, flags); 2100 list_for_each_entry(tgt, &vhost->targets, queue) { 2101 if (tgt->scsi_id == port_id) { 2102 issue_login = 0; 2103 break; 2104 } 2105 } 2106 2107 if (!issue_login) 2108 goto unlock_out; 2109 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 2110 goto unlock_out; 2111 2112 evt = ibmvfc_get_event(&vhost->crq); 2113 if (!evt) { 2114 rc = -ENOMEM; 2115 goto unlock_out; 2116 } 2117 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2118 plogi = &evt->iu.plogi; 2119 memset(plogi, 0, sizeof(*plogi)); 2120 plogi->common.version = cpu_to_be32(1); 2121 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 2122 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 2123 plogi->scsi_id = cpu_to_be64(port_id); 2124 evt->sync_iu = &rsp_iu; 2125 init_completion(&evt->comp); 2126 2127 rc = ibmvfc_send_event(evt, vhost, default_timeout); 2128 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2129 2130 if (rc) 2131 return -EIO; 2132 2133 wait_for_completion(&evt->comp); 2134 2135 if (rsp_iu.plogi.common.status) 2136 rc = -EIO; 2137 2138 spin_lock_irqsave(vhost->host->host_lock, flags); 2139 ibmvfc_free_event(evt); 2140 unlock_out: 2141 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2142 LEAVE; 2143 return rc; 2144 } 2145 2146 /** 2147 * ibmvfc_bsg_request - Handle a BSG request 2148 * @job: struct bsg_job to be executed 2149 * 2150 * Returns: 2151 * 0 on success / other on failure 2152 **/ 2153 static int ibmvfc_bsg_request(struct bsg_job *job) 2154 { 2155 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 2156 struct fc_rport *rport = fc_bsg_to_rport(job); 2157 struct ibmvfc_passthru_mad *mad; 2158 struct ibmvfc_event *evt; 2159 union ibmvfc_iu rsp_iu; 2160 unsigned long flags, port_id = -1; 2161 struct fc_bsg_request *bsg_request = job->request; 2162 struct fc_bsg_reply *bsg_reply = job->reply; 2163 unsigned int code = bsg_request->msgcode; 2164 int rc = 0, req_seg, rsp_seg, issue_login = 0; 2165 u32 fc_flags, rsp_len; 2166 2167 ENTER; 2168 bsg_reply->reply_payload_rcv_len = 0; 2169 if (rport) 2170 port_id = rport->port_id; 2171 2172 switch (code) { 2173 case FC_BSG_HST_ELS_NOLOGIN: 2174 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) | 2175 (bsg_request->rqst_data.h_els.port_id[1] << 8) | 2176 bsg_request->rqst_data.h_els.port_id[2]; 2177 fallthrough; 2178 case FC_BSG_RPT_ELS: 2179 fc_flags = IBMVFC_FC_ELS; 2180 break; 2181 case FC_BSG_HST_CT: 2182 issue_login = 1; 2183 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) | 2184 (bsg_request->rqst_data.h_ct.port_id[1] << 8) | 2185 bsg_request->rqst_data.h_ct.port_id[2]; 2186 fallthrough; 2187 case FC_BSG_RPT_CT: 2188 fc_flags = IBMVFC_FC_CT_IU; 2189 break; 2190 default: 2191 return -ENOTSUPP; 2192 } 2193 2194 if (port_id == -1) 2195 return -EINVAL; 2196 if (!mutex_trylock(&vhost->passthru_mutex)) 2197 return -EBUSY; 2198 2199 job->dd_data = (void *)port_id; 2200 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 2201 job->request_payload.sg_cnt, DMA_TO_DEVICE); 2202 2203 if (!req_seg) { 2204 mutex_unlock(&vhost->passthru_mutex); 2205 return -ENOMEM; 2206 } 2207 2208 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 2209 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 2210 2211 if (!rsp_seg) { 2212 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 2213 job->request_payload.sg_cnt, DMA_TO_DEVICE); 2214 mutex_unlock(&vhost->passthru_mutex); 2215 return -ENOMEM; 2216 } 2217 2218 if (req_seg > 1 || rsp_seg > 1) { 2219 rc = -EINVAL; 2220 goto out; 2221 } 2222 2223 if (issue_login) 2224 rc = ibmvfc_bsg_plogi(vhost, port_id); 2225 2226 spin_lock_irqsave(vhost->host->host_lock, flags); 2227 2228 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 2229 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 2230 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2231 goto out; 2232 } 2233 2234 evt = ibmvfc_get_event(&vhost->crq); 2235 if (!evt) { 2236 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2237 rc = -ENOMEM; 2238 goto out; 2239 } 2240 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2241 mad = &evt->iu.passthru; 2242 2243 memset(mad, 0, sizeof(*mad)); 2244 mad->common.version = cpu_to_be32(1); 2245 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 2246 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 2247 2248 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + 2249 offsetof(struct ibmvfc_passthru_mad, iu)); 2250 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 2251 2252 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); 2253 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); 2254 mad->iu.flags = cpu_to_be32(fc_flags); 2255 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 2256 2257 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); 2258 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); 2259 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); 2260 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); 2261 mad->iu.scsi_id = cpu_to_be64(port_id); 2262 mad->iu.tag = cpu_to_be64((u64)evt); 2263 rsp_len = be32_to_cpu(mad->iu.rsp.len); 2264 2265 evt->sync_iu = &rsp_iu; 2266 init_completion(&evt->comp); 2267 rc = ibmvfc_send_event(evt, vhost, 0); 2268 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2269 2270 if (rc) { 2271 rc = -EIO; 2272 goto out; 2273 } 2274 2275 wait_for_completion(&evt->comp); 2276 2277 if (rsp_iu.passthru.common.status) 2278 rc = -EIO; 2279 else 2280 bsg_reply->reply_payload_rcv_len = rsp_len; 2281 2282 spin_lock_irqsave(vhost->host->host_lock, flags); 2283 ibmvfc_free_event(evt); 2284 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2285 bsg_reply->result = rc; 2286 bsg_job_done(job, bsg_reply->result, 2287 bsg_reply->reply_payload_rcv_len); 2288 rc = 0; 2289 out: 2290 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 2291 job->request_payload.sg_cnt, DMA_TO_DEVICE); 2292 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 2293 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 2294 mutex_unlock(&vhost->passthru_mutex); 2295 LEAVE; 2296 return rc; 2297 } 2298 2299 /** 2300 * ibmvfc_reset_device - Reset the device with the specified reset type 2301 * @sdev: scsi device to reset 2302 * @type: reset type 2303 * @desc: reset type description for log messages 2304 * 2305 * Returns: 2306 * 0 on success / other on failure 2307 **/ 2308 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 2309 { 2310 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2311 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2312 struct ibmvfc_cmd *tmf; 2313 struct ibmvfc_event *evt = NULL; 2314 union ibmvfc_iu rsp_iu; 2315 struct ibmvfc_fcp_cmd_iu *iu; 2316 struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); 2317 int rsp_rc = -EBUSY; 2318 unsigned long flags; 2319 int rsp_code = 0; 2320 2321 spin_lock_irqsave(vhost->host->host_lock, flags); 2322 if (vhost->state == IBMVFC_ACTIVE) { 2323 if (vhost->using_channels) 2324 evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[0]); 2325 else 2326 evt = ibmvfc_get_event(&vhost->crq); 2327 2328 if (!evt) { 2329 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2330 return -ENOMEM; 2331 } 2332 2333 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2334 tmf = ibmvfc_init_vfc_cmd(evt, sdev); 2335 iu = ibmvfc_get_fcp_iu(vhost, tmf); 2336 2337 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2338 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 2339 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2340 iu->tmf_flags = type; 2341 evt->sync_iu = &rsp_iu; 2342 2343 init_completion(&evt->comp); 2344 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2345 } 2346 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2347 2348 if (rsp_rc != 0) { 2349 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 2350 desc, rsp_rc); 2351 return -EIO; 2352 } 2353 2354 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2355 wait_for_completion(&evt->comp); 2356 2357 if (rsp_iu.cmd.status) 2358 rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); 2359 2360 if (rsp_code) { 2361 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2362 rsp_code = fc_rsp->data.info.rsp_code; 2363 2364 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2365 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, 2366 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2367 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, 2368 fc_rsp->scsi_status); 2369 rsp_rc = -EIO; 2370 } else 2371 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2372 2373 spin_lock_irqsave(vhost->host->host_lock, flags); 2374 ibmvfc_free_event(evt); 2375 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2376 return rsp_rc; 2377 } 2378 2379 /** 2380 * ibmvfc_match_rport - Match function for specified remote port 2381 * @evt: ibmvfc event struct 2382 * @rport: device to match 2383 * 2384 * Returns: 2385 * 1 if event matches rport / 0 if event does not match rport 2386 **/ 2387 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2388 { 2389 struct fc_rport *cmd_rport; 2390 2391 if (evt->cmnd) { 2392 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2393 if (cmd_rport == rport) 2394 return 1; 2395 } 2396 return 0; 2397 } 2398 2399 /** 2400 * ibmvfc_match_target - Match function for specified target 2401 * @evt: ibmvfc event struct 2402 * @device: device to match (starget) 2403 * 2404 * Returns: 2405 * 1 if event matches starget / 0 if event does not match starget 2406 **/ 2407 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2408 { 2409 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2410 return 1; 2411 return 0; 2412 } 2413 2414 /** 2415 * ibmvfc_match_lun - Match function for specified LUN 2416 * @evt: ibmvfc event struct 2417 * @device: device to match (sdev) 2418 * 2419 * Returns: 2420 * 1 if event matches sdev / 0 if event does not match sdev 2421 **/ 2422 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2423 { 2424 if (evt->cmnd && evt->cmnd->device == device) 2425 return 1; 2426 return 0; 2427 } 2428 2429 /** 2430 * ibmvfc_event_is_free - Check if event is free or not 2431 * @evt: ibmvfc event struct 2432 * 2433 * Returns: 2434 * true / false 2435 **/ 2436 static bool ibmvfc_event_is_free(struct ibmvfc_event *evt) 2437 { 2438 struct ibmvfc_event *loop_evt; 2439 2440 list_for_each_entry(loop_evt, &evt->queue->free, queue_list) 2441 if (loop_evt == evt) 2442 return true; 2443 2444 return false; 2445 } 2446 2447 /** 2448 * ibmvfc_wait_for_ops - Wait for ops to complete 2449 * @vhost: ibmvfc host struct 2450 * @device: device to match (starget or sdev) 2451 * @match: match function 2452 * 2453 * Returns: 2454 * SUCCESS / FAILED 2455 **/ 2456 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2457 int (*match) (struct ibmvfc_event *, void *)) 2458 { 2459 struct ibmvfc_event *evt; 2460 DECLARE_COMPLETION_ONSTACK(comp); 2461 int wait, i, q_index, q_size; 2462 unsigned long flags; 2463 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2464 struct ibmvfc_queue *queues; 2465 2466 ENTER; 2467 if (vhost->mq_enabled && vhost->using_channels) { 2468 queues = vhost->scsi_scrqs.scrqs; 2469 q_size = vhost->scsi_scrqs.active_queues; 2470 } else { 2471 queues = &vhost->crq; 2472 q_size = 1; 2473 } 2474 2475 do { 2476 wait = 0; 2477 spin_lock_irqsave(vhost->host->host_lock, flags); 2478 for (q_index = 0; q_index < q_size; q_index++) { 2479 spin_lock(&queues[q_index].l_lock); 2480 for (i = 0; i < queues[q_index].evt_pool.size; i++) { 2481 evt = &queues[q_index].evt_pool.events[i]; 2482 if (!ibmvfc_event_is_free(evt)) { 2483 if (match(evt, device)) { 2484 evt->eh_comp = ∁ 2485 wait++; 2486 } 2487 } 2488 } 2489 spin_unlock(&queues[q_index].l_lock); 2490 } 2491 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2492 2493 if (wait) { 2494 timeout = wait_for_completion_timeout(&comp, timeout); 2495 2496 if (!timeout) { 2497 wait = 0; 2498 spin_lock_irqsave(vhost->host->host_lock, flags); 2499 for (q_index = 0; q_index < q_size; q_index++) { 2500 spin_lock(&queues[q_index].l_lock); 2501 for (i = 0; i < queues[q_index].evt_pool.size; i++) { 2502 evt = &queues[q_index].evt_pool.events[i]; 2503 if (!ibmvfc_event_is_free(evt)) { 2504 if (match(evt, device)) { 2505 evt->eh_comp = NULL; 2506 wait++; 2507 } 2508 } 2509 } 2510 spin_unlock(&queues[q_index].l_lock); 2511 } 2512 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2513 if (wait) 2514 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2515 LEAVE; 2516 return wait ? FAILED : SUCCESS; 2517 } 2518 } 2519 } while (wait); 2520 2521 LEAVE; 2522 return SUCCESS; 2523 } 2524 2525 static struct ibmvfc_event *ibmvfc_init_tmf(struct ibmvfc_queue *queue, 2526 struct scsi_device *sdev, 2527 int type) 2528 { 2529 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2530 struct scsi_target *starget = scsi_target(sdev); 2531 struct fc_rport *rport = starget_to_rport(starget); 2532 struct ibmvfc_event *evt; 2533 struct ibmvfc_tmf *tmf; 2534 2535 evt = ibmvfc_get_event(queue); 2536 if (!evt) 2537 return NULL; 2538 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2539 2540 tmf = &evt->iu.tmf; 2541 memset(tmf, 0, sizeof(*tmf)); 2542 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 2543 tmf->common.version = cpu_to_be32(2); 2544 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2545 } else { 2546 tmf->common.version = cpu_to_be32(1); 2547 } 2548 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2549 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2550 tmf->scsi_id = cpu_to_be64(rport->port_id); 2551 int_to_scsilun(sdev->lun, &tmf->lun); 2552 if (!ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPRESS_ABTS)) 2553 type &= ~IBMVFC_TMF_SUPPRESS_ABTS; 2554 if (vhost->state == IBMVFC_ACTIVE) 2555 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); 2556 else 2557 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); 2558 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2559 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); 2560 2561 init_completion(&evt->comp); 2562 2563 return evt; 2564 } 2565 2566 static int ibmvfc_cancel_all_mq(struct scsi_device *sdev, int type) 2567 { 2568 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2569 struct ibmvfc_event *evt, *found_evt, *temp; 2570 struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; 2571 unsigned long flags; 2572 int num_hwq, i; 2573 int fail = 0; 2574 LIST_HEAD(cancelq); 2575 u16 status; 2576 2577 ENTER; 2578 spin_lock_irqsave(vhost->host->host_lock, flags); 2579 num_hwq = vhost->scsi_scrqs.active_queues; 2580 for (i = 0; i < num_hwq; i++) { 2581 spin_lock(queues[i].q_lock); 2582 spin_lock(&queues[i].l_lock); 2583 found_evt = NULL; 2584 list_for_each_entry(evt, &queues[i].sent, queue_list) { 2585 if (evt->cmnd && evt->cmnd->device == sdev) { 2586 found_evt = evt; 2587 break; 2588 } 2589 } 2590 spin_unlock(&queues[i].l_lock); 2591 2592 if (found_evt && vhost->logged_in) { 2593 evt = ibmvfc_init_tmf(&queues[i], sdev, type); 2594 if (!evt) { 2595 spin_unlock(queues[i].q_lock); 2596 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2597 return -ENOMEM; 2598 } 2599 evt->sync_iu = &queues[i].cancel_rsp; 2600 ibmvfc_send_event(evt, vhost, default_timeout); 2601 list_add_tail(&evt->cancel, &cancelq); 2602 } 2603 2604 spin_unlock(queues[i].q_lock); 2605 } 2606 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2607 2608 if (list_empty(&cancelq)) { 2609 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2610 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2611 return 0; 2612 } 2613 2614 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2615 2616 list_for_each_entry_safe(evt, temp, &cancelq, cancel) { 2617 wait_for_completion(&evt->comp); 2618 status = be16_to_cpu(evt->queue->cancel_rsp.mad_common.status); 2619 list_del(&evt->cancel); 2620 ibmvfc_free_event(evt); 2621 2622 if (status != IBMVFC_MAD_SUCCESS) { 2623 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2624 switch (status) { 2625 case IBMVFC_MAD_DRIVER_FAILED: 2626 case IBMVFC_MAD_CRQ_ERROR: 2627 /* Host adapter most likely going through reset, return success to 2628 * the caller will wait for the command being cancelled to get returned 2629 */ 2630 break; 2631 default: 2632 fail = 1; 2633 break; 2634 } 2635 } 2636 } 2637 2638 if (fail) 2639 return -EIO; 2640 2641 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2642 LEAVE; 2643 return 0; 2644 } 2645 2646 static int ibmvfc_cancel_all_sq(struct scsi_device *sdev, int type) 2647 { 2648 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2649 struct ibmvfc_event *evt, *found_evt; 2650 union ibmvfc_iu rsp; 2651 int rsp_rc = -EBUSY; 2652 unsigned long flags; 2653 u16 status; 2654 2655 ENTER; 2656 found_evt = NULL; 2657 spin_lock_irqsave(vhost->host->host_lock, flags); 2658 spin_lock(&vhost->crq.l_lock); 2659 list_for_each_entry(evt, &vhost->crq.sent, queue_list) { 2660 if (evt->cmnd && evt->cmnd->device == sdev) { 2661 found_evt = evt; 2662 break; 2663 } 2664 } 2665 spin_unlock(&vhost->crq.l_lock); 2666 2667 if (!found_evt) { 2668 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2669 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2670 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2671 return 0; 2672 } 2673 2674 if (vhost->logged_in) { 2675 evt = ibmvfc_init_tmf(&vhost->crq, sdev, type); 2676 evt->sync_iu = &rsp; 2677 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2678 } 2679 2680 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2681 2682 if (rsp_rc != 0) { 2683 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2684 /* If failure is received, the host adapter is most likely going 2685 through reset, return success so the caller will wait for the command 2686 being cancelled to get returned */ 2687 return 0; 2688 } 2689 2690 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2691 2692 wait_for_completion(&evt->comp); 2693 status = be16_to_cpu(rsp.mad_common.status); 2694 spin_lock_irqsave(vhost->host->host_lock, flags); 2695 ibmvfc_free_event(evt); 2696 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2697 2698 if (status != IBMVFC_MAD_SUCCESS) { 2699 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2700 switch (status) { 2701 case IBMVFC_MAD_DRIVER_FAILED: 2702 case IBMVFC_MAD_CRQ_ERROR: 2703 /* Host adapter most likely going through reset, return success to 2704 the caller will wait for the command being cancelled to get returned */ 2705 return 0; 2706 default: 2707 return -EIO; 2708 }; 2709 } 2710 2711 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2712 return 0; 2713 } 2714 2715 /** 2716 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2717 * @sdev: scsi device to cancel commands 2718 * @type: type of error recovery being performed 2719 * 2720 * This sends a cancel to the VIOS for the specified device. This does 2721 * NOT send any abort to the actual device. That must be done separately. 2722 * 2723 * Returns: 2724 * 0 on success / other on failure 2725 **/ 2726 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2727 { 2728 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2729 2730 if (vhost->mq_enabled && vhost->using_channels) 2731 return ibmvfc_cancel_all_mq(sdev, type); 2732 else 2733 return ibmvfc_cancel_all_sq(sdev, type); 2734 } 2735 2736 /** 2737 * ibmvfc_match_key - Match function for specified cancel key 2738 * @evt: ibmvfc event struct 2739 * @key: cancel key to match 2740 * 2741 * Returns: 2742 * 1 if event matches key / 0 if event does not match key 2743 **/ 2744 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2745 { 2746 unsigned long cancel_key = (unsigned long)key; 2747 2748 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2749 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) 2750 return 1; 2751 return 0; 2752 } 2753 2754 /** 2755 * ibmvfc_match_evt - Match function for specified event 2756 * @evt: ibmvfc event struct 2757 * @match: event to match 2758 * 2759 * Returns: 2760 * 1 if event matches key / 0 if event does not match key 2761 **/ 2762 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) 2763 { 2764 if (evt == match) 2765 return 1; 2766 return 0; 2767 } 2768 2769 /** 2770 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2771 * @sdev: scsi device to abort commands 2772 * 2773 * This sends an Abort Task Set to the VIOS for the specified device. This does 2774 * NOT send any cancel to the VIOS. That must be done separately. 2775 * 2776 * Returns: 2777 * 0 on success / other on failure 2778 **/ 2779 static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2780 { 2781 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2782 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2783 struct ibmvfc_cmd *tmf; 2784 struct ibmvfc_event *evt, *found_evt; 2785 union ibmvfc_iu rsp_iu; 2786 struct ibmvfc_fcp_cmd_iu *iu; 2787 struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); 2788 int rc, rsp_rc = -EBUSY; 2789 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2790 int rsp_code = 0; 2791 2792 found_evt = NULL; 2793 spin_lock_irqsave(vhost->host->host_lock, flags); 2794 spin_lock(&vhost->crq.l_lock); 2795 list_for_each_entry(evt, &vhost->crq.sent, queue_list) { 2796 if (evt->cmnd && evt->cmnd->device == sdev) { 2797 found_evt = evt; 2798 break; 2799 } 2800 } 2801 spin_unlock(&vhost->crq.l_lock); 2802 2803 if (!found_evt) { 2804 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2805 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2806 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2807 return 0; 2808 } 2809 2810 if (vhost->state == IBMVFC_ACTIVE) { 2811 evt = ibmvfc_get_event(&vhost->crq); 2812 if (!evt) { 2813 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2814 return -ENOMEM; 2815 } 2816 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2817 tmf = ibmvfc_init_vfc_cmd(evt, sdev); 2818 iu = ibmvfc_get_fcp_iu(vhost, tmf); 2819 2820 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 2821 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2822 iu->tmf_flags = IBMVFC_ABORT_TASK_SET; 2823 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2824 evt->sync_iu = &rsp_iu; 2825 2826 tmf->correlation = cpu_to_be64((u64)evt); 2827 2828 init_completion(&evt->comp); 2829 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2830 } 2831 2832 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2833 2834 if (rsp_rc != 0) { 2835 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2836 return -EIO; 2837 } 2838 2839 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2840 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2841 2842 if (!timeout) { 2843 rc = ibmvfc_cancel_all(sdev, 0); 2844 if (!rc) { 2845 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2846 if (rc == SUCCESS) 2847 rc = 0; 2848 } 2849 2850 if (rc) { 2851 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2852 ibmvfc_reset_host(vhost); 2853 rsp_rc = -EIO; 2854 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2855 2856 if (rc == SUCCESS) 2857 rsp_rc = 0; 2858 2859 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); 2860 if (rc != SUCCESS) { 2861 spin_lock_irqsave(vhost->host->host_lock, flags); 2862 ibmvfc_hard_reset_host(vhost); 2863 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2864 rsp_rc = 0; 2865 } 2866 2867 goto out; 2868 } 2869 } 2870 2871 if (rsp_iu.cmd.status) 2872 rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); 2873 2874 if (rsp_code) { 2875 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2876 rsp_code = fc_rsp->data.info.rsp_code; 2877 2878 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2879 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2880 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2881 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, 2882 fc_rsp->scsi_status); 2883 rsp_rc = -EIO; 2884 } else 2885 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2886 2887 out: 2888 spin_lock_irqsave(vhost->host->host_lock, flags); 2889 ibmvfc_free_event(evt); 2890 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2891 return rsp_rc; 2892 } 2893 2894 /** 2895 * ibmvfc_eh_abort_handler - Abort a command 2896 * @cmd: scsi command to abort 2897 * 2898 * Returns: 2899 * SUCCESS / FAST_IO_FAIL / FAILED 2900 **/ 2901 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2902 { 2903 struct scsi_device *sdev = cmd->device; 2904 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2905 int cancel_rc, block_rc; 2906 int rc = FAILED; 2907 2908 ENTER; 2909 block_rc = fc_block_scsi_eh(cmd); 2910 ibmvfc_wait_while_resetting(vhost); 2911 if (block_rc != FAST_IO_FAIL) { 2912 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2913 ibmvfc_abort_task_set(sdev); 2914 } else 2915 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2916 2917 if (!cancel_rc) 2918 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2919 2920 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2921 rc = FAST_IO_FAIL; 2922 2923 LEAVE; 2924 return rc; 2925 } 2926 2927 /** 2928 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2929 * @cmd: scsi command struct 2930 * 2931 * Returns: 2932 * SUCCESS / FAST_IO_FAIL / FAILED 2933 **/ 2934 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2935 { 2936 struct scsi_device *sdev = cmd->device; 2937 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2938 int cancel_rc, block_rc, reset_rc = 0; 2939 int rc = FAILED; 2940 2941 ENTER; 2942 block_rc = fc_block_scsi_eh(cmd); 2943 ibmvfc_wait_while_resetting(vhost); 2944 if (block_rc != FAST_IO_FAIL) { 2945 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2946 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2947 } else 2948 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2949 2950 if (!cancel_rc && !reset_rc) 2951 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2952 2953 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2954 rc = FAST_IO_FAIL; 2955 2956 LEAVE; 2957 return rc; 2958 } 2959 2960 /** 2961 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function 2962 * @sdev: scsi device struct 2963 * @data: return code 2964 * 2965 **/ 2966 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) 2967 { 2968 unsigned long *rc = data; 2969 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2970 } 2971 2972 /** 2973 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2974 * @sdev: scsi device struct 2975 * @data: return code 2976 * 2977 **/ 2978 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2979 { 2980 unsigned long *rc = data; 2981 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2982 } 2983 2984 /** 2985 * ibmvfc_eh_target_reset_handler - Reset the target 2986 * @cmd: scsi command struct 2987 * 2988 * Returns: 2989 * SUCCESS / FAST_IO_FAIL / FAILED 2990 **/ 2991 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2992 { 2993 struct scsi_device *sdev = cmd->device; 2994 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2995 struct scsi_target *starget = scsi_target(sdev); 2996 int block_rc; 2997 int reset_rc = 0; 2998 int rc = FAILED; 2999 unsigned long cancel_rc = 0; 3000 3001 ENTER; 3002 block_rc = fc_block_scsi_eh(cmd); 3003 ibmvfc_wait_while_resetting(vhost); 3004 if (block_rc != FAST_IO_FAIL) { 3005 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 3006 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 3007 } else 3008 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); 3009 3010 if (!cancel_rc && !reset_rc) 3011 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 3012 3013 if (block_rc == FAST_IO_FAIL && rc != FAILED) 3014 rc = FAST_IO_FAIL; 3015 3016 LEAVE; 3017 return rc; 3018 } 3019 3020 /** 3021 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 3022 * @cmd: struct scsi_cmnd having problems 3023 * 3024 **/ 3025 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 3026 { 3027 int rc; 3028 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 3029 3030 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 3031 rc = ibmvfc_issue_fc_host_lip(vhost->host); 3032 3033 return rc ? FAILED : SUCCESS; 3034 } 3035 3036 /** 3037 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 3038 * @rport: rport struct 3039 * 3040 * Return value: 3041 * none 3042 **/ 3043 static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 3044 { 3045 struct Scsi_Host *shost = rport_to_shost(rport); 3046 struct ibmvfc_host *vhost = shost_priv(shost); 3047 struct fc_rport *dev_rport; 3048 struct scsi_device *sdev; 3049 struct ibmvfc_target *tgt; 3050 unsigned long rc, flags; 3051 unsigned int found; 3052 3053 ENTER; 3054 shost_for_each_device(sdev, shost) { 3055 dev_rport = starget_to_rport(scsi_target(sdev)); 3056 if (dev_rport != rport) 3057 continue; 3058 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 3059 } 3060 3061 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 3062 3063 if (rc == FAILED) 3064 ibmvfc_issue_fc_host_lip(shost); 3065 3066 spin_lock_irqsave(shost->host_lock, flags); 3067 found = 0; 3068 list_for_each_entry(tgt, &vhost->targets, queue) { 3069 if (tgt->scsi_id == rport->port_id) { 3070 found++; 3071 break; 3072 } 3073 } 3074 3075 if (found && tgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 3076 /* 3077 * If we get here, that means we previously attempted to send 3078 * an implicit logout to the target but it failed, most likely 3079 * due to I/O being pending, so we need to send it again 3080 */ 3081 ibmvfc_del_tgt(tgt); 3082 ibmvfc_reinit_host(vhost); 3083 } 3084 3085 spin_unlock_irqrestore(shost->host_lock, flags); 3086 LEAVE; 3087 } 3088 3089 static const struct ibmvfc_async_desc ae_desc [] = { 3090 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3091 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3092 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3093 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3094 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3095 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, 3096 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, 3097 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, 3098 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, 3099 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, 3100 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, 3101 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, 3102 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, 3103 }; 3104 3105 static const struct ibmvfc_async_desc unknown_ae = { 3106 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL 3107 }; 3108 3109 /** 3110 * ibmvfc_get_ae_desc - Get text description for async event 3111 * @ae: async event 3112 * 3113 **/ 3114 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 3115 { 3116 int i; 3117 3118 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 3119 if (ae_desc[i].ae == ae) 3120 return &ae_desc[i]; 3121 3122 return &unknown_ae; 3123 } 3124 3125 static const struct { 3126 enum ibmvfc_ae_link_state state; 3127 const char *desc; 3128 } link_desc [] = { 3129 { IBMVFC_AE_LS_LINK_UP, " link up" }, 3130 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 3131 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 3132 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 3133 }; 3134 3135 /** 3136 * ibmvfc_get_link_state - Get text description for link state 3137 * @state: link state 3138 * 3139 **/ 3140 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 3141 { 3142 int i; 3143 3144 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 3145 if (link_desc[i].state == state) 3146 return link_desc[i].desc; 3147 3148 return ""; 3149 } 3150 3151 /** 3152 * ibmvfc_handle_async - Handle an async event from the adapter 3153 * @crq: crq to process 3154 * @vhost: ibmvfc host struct 3155 * 3156 **/ 3157 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 3158 struct ibmvfc_host *vhost) 3159 { 3160 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); 3161 struct ibmvfc_target *tgt; 3162 3163 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 3164 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id), 3165 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name), 3166 ibmvfc_get_link_state(crq->link_state)); 3167 3168 switch (be64_to_cpu(crq->event)) { 3169 case IBMVFC_AE_RESUME: 3170 switch (crq->link_state) { 3171 case IBMVFC_AE_LS_LINK_DOWN: 3172 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3173 break; 3174 case IBMVFC_AE_LS_LINK_DEAD: 3175 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3176 break; 3177 case IBMVFC_AE_LS_LINK_UP: 3178 case IBMVFC_AE_LS_LINK_BOUNCED: 3179 default: 3180 vhost->events_to_log |= IBMVFC_AE_LINKUP; 3181 vhost->delay_init = 1; 3182 __ibmvfc_reset_host(vhost); 3183 break; 3184 } 3185 3186 break; 3187 case IBMVFC_AE_LINK_UP: 3188 vhost->events_to_log |= IBMVFC_AE_LINKUP; 3189 vhost->delay_init = 1; 3190 __ibmvfc_reset_host(vhost); 3191 break; 3192 case IBMVFC_AE_SCN_FABRIC: 3193 case IBMVFC_AE_SCN_DOMAIN: 3194 vhost->events_to_log |= IBMVFC_AE_RSCN; 3195 if (vhost->state < IBMVFC_HALTED) { 3196 vhost->delay_init = 1; 3197 __ibmvfc_reset_host(vhost); 3198 } 3199 break; 3200 case IBMVFC_AE_SCN_NPORT: 3201 case IBMVFC_AE_SCN_GROUP: 3202 vhost->events_to_log |= IBMVFC_AE_RSCN; 3203 ibmvfc_reinit_host(vhost); 3204 break; 3205 case IBMVFC_AE_ELS_LOGO: 3206 case IBMVFC_AE_ELS_PRLO: 3207 case IBMVFC_AE_ELS_PLOGI: 3208 list_for_each_entry(tgt, &vhost->targets, queue) { 3209 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 3210 break; 3211 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) 3212 continue; 3213 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) 3214 continue; 3215 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) 3216 continue; 3217 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) 3218 tgt->logo_rcvd = 1; 3219 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { 3220 ibmvfc_del_tgt(tgt); 3221 ibmvfc_reinit_host(vhost); 3222 } 3223 } 3224 break; 3225 case IBMVFC_AE_LINK_DOWN: 3226 case IBMVFC_AE_ADAPTER_FAILED: 3227 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3228 break; 3229 case IBMVFC_AE_LINK_DEAD: 3230 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3231 break; 3232 case IBMVFC_AE_HALT: 3233 ibmvfc_link_down(vhost, IBMVFC_HALTED); 3234 break; 3235 default: 3236 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 3237 break; 3238 } 3239 } 3240 3241 /** 3242 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 3243 * @crq: Command/Response queue 3244 * @vhost: ibmvfc host struct 3245 * @evt_doneq: Event done queue 3246 * 3247 **/ 3248 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost, 3249 struct list_head *evt_doneq) 3250 { 3251 long rc; 3252 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 3253 3254 switch (crq->valid) { 3255 case IBMVFC_CRQ_INIT_RSP: 3256 switch (crq->format) { 3257 case IBMVFC_CRQ_INIT: 3258 dev_info(vhost->dev, "Partner initialized\n"); 3259 /* Send back a response */ 3260 rc = ibmvfc_send_crq_init_complete(vhost); 3261 if (rc == 0) 3262 ibmvfc_init_host(vhost); 3263 else 3264 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 3265 break; 3266 case IBMVFC_CRQ_INIT_COMPLETE: 3267 dev_info(vhost->dev, "Partner initialization complete\n"); 3268 ibmvfc_init_host(vhost); 3269 break; 3270 default: 3271 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 3272 } 3273 return; 3274 case IBMVFC_CRQ_XPORT_EVENT: 3275 vhost->state = IBMVFC_NO_CRQ; 3276 vhost->logged_in = 0; 3277 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3278 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 3279 /* We need to re-setup the interpartition connection */ 3280 dev_info(vhost->dev, "Partition migrated, Re-enabling adapter\n"); 3281 vhost->client_migrated = 1; 3282 3283 scsi_block_requests(vhost->host); 3284 ibmvfc_purge_requests(vhost, DID_REQUEUE); 3285 ibmvfc_set_host_state(vhost, IBMVFC_LINK_DOWN); 3286 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 3287 wake_up(&vhost->work_wait_q); 3288 } else if (crq->format == IBMVFC_PARTNER_FAILED || crq->format == IBMVFC_PARTNER_DEREGISTER) { 3289 dev_err(vhost->dev, "Host partner adapter deregistered or failed (rc=%d)\n", crq->format); 3290 ibmvfc_purge_requests(vhost, DID_ERROR); 3291 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3292 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 3293 } else { 3294 dev_err(vhost->dev, "Received unknown transport event from partner (rc=%d)\n", crq->format); 3295 } 3296 return; 3297 case IBMVFC_CRQ_CMD_RSP: 3298 break; 3299 default: 3300 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 3301 return; 3302 } 3303 3304 if (crq->format == IBMVFC_ASYNC_EVENT) 3305 return; 3306 3307 /* The only kind of payload CRQs we should get are responses to 3308 * things we send. Make sure this response is to something we 3309 * actually sent 3310 */ 3311 if (unlikely(!ibmvfc_valid_event(&vhost->crq.evt_pool, evt))) { 3312 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 3313 crq->ioba); 3314 return; 3315 } 3316 3317 if (unlikely(atomic_dec_if_positive(&evt->active))) { 3318 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 3319 crq->ioba); 3320 return; 3321 } 3322 3323 spin_lock(&evt->queue->l_lock); 3324 list_move_tail(&evt->queue_list, evt_doneq); 3325 spin_unlock(&evt->queue->l_lock); 3326 } 3327 3328 /** 3329 * ibmvfc_scan_finished - Check if the device scan is done. 3330 * @shost: scsi host struct 3331 * @time: current elapsed time 3332 * 3333 * Returns: 3334 * 0 if scan is not done / 1 if scan is done 3335 **/ 3336 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 3337 { 3338 unsigned long flags; 3339 struct ibmvfc_host *vhost = shost_priv(shost); 3340 int done = 0; 3341 3342 spin_lock_irqsave(shost->host_lock, flags); 3343 if (!vhost->scan_timeout) 3344 done = 1; 3345 else if (time >= (vhost->scan_timeout * HZ)) { 3346 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 3347 "continuing initialization\n", vhost->scan_timeout); 3348 done = 1; 3349 } 3350 3351 if (vhost->scan_complete) { 3352 vhost->scan_timeout = init_timeout; 3353 done = 1; 3354 } 3355 spin_unlock_irqrestore(shost->host_lock, flags); 3356 return done; 3357 } 3358 3359 /** 3360 * ibmvfc_slave_alloc - Setup the device's task set value 3361 * @sdev: struct scsi_device device to configure 3362 * 3363 * Set the device's task set value so that error handling works as 3364 * expected. 3365 * 3366 * Returns: 3367 * 0 on success / -ENXIO if device does not exist 3368 **/ 3369 static int ibmvfc_slave_alloc(struct scsi_device *sdev) 3370 { 3371 struct Scsi_Host *shost = sdev->host; 3372 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 3373 struct ibmvfc_host *vhost = shost_priv(shost); 3374 unsigned long flags = 0; 3375 3376 if (!rport || fc_remote_port_chkready(rport)) 3377 return -ENXIO; 3378 3379 spin_lock_irqsave(shost->host_lock, flags); 3380 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 3381 spin_unlock_irqrestore(shost->host_lock, flags); 3382 return 0; 3383 } 3384 3385 /** 3386 * ibmvfc_target_alloc - Setup the target's task set value 3387 * @starget: struct scsi_target 3388 * 3389 * Set the target's task set value so that error handling works as 3390 * expected. 3391 * 3392 * Returns: 3393 * 0 on success / -ENXIO if device does not exist 3394 **/ 3395 static int ibmvfc_target_alloc(struct scsi_target *starget) 3396 { 3397 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 3398 struct ibmvfc_host *vhost = shost_priv(shost); 3399 unsigned long flags = 0; 3400 3401 spin_lock_irqsave(shost->host_lock, flags); 3402 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 3403 spin_unlock_irqrestore(shost->host_lock, flags); 3404 return 0; 3405 } 3406 3407 /** 3408 * ibmvfc_slave_configure - Configure the device 3409 * @sdev: struct scsi_device device to configure 3410 * 3411 * Enable allow_restart for a device if it is a disk. Adjust the 3412 * queue_depth here also. 3413 * 3414 * Returns: 3415 * 0 3416 **/ 3417 static int ibmvfc_slave_configure(struct scsi_device *sdev) 3418 { 3419 struct Scsi_Host *shost = sdev->host; 3420 unsigned long flags = 0; 3421 3422 spin_lock_irqsave(shost->host_lock, flags); 3423 if (sdev->type == TYPE_DISK) { 3424 sdev->allow_restart = 1; 3425 blk_queue_rq_timeout(sdev->request_queue, 120 * HZ); 3426 } 3427 spin_unlock_irqrestore(shost->host_lock, flags); 3428 return 0; 3429 } 3430 3431 /** 3432 * ibmvfc_change_queue_depth - Change the device's queue depth 3433 * @sdev: scsi device struct 3434 * @qdepth: depth to set 3435 * 3436 * Return value: 3437 * actual depth set 3438 **/ 3439 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 3440 { 3441 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 3442 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 3443 3444 return scsi_change_queue_depth(sdev, qdepth); 3445 } 3446 3447 static ssize_t ibmvfc_show_host_partition_name(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 3453 return snprintf(buf, PAGE_SIZE, "%s\n", 3454 vhost->login_buf->resp.partition_name); 3455 } 3456 3457 static ssize_t ibmvfc_show_host_device_name(struct device *dev, 3458 struct device_attribute *attr, char *buf) 3459 { 3460 struct Scsi_Host *shost = class_to_shost(dev); 3461 struct ibmvfc_host *vhost = shost_priv(shost); 3462 3463 return snprintf(buf, PAGE_SIZE, "%s\n", 3464 vhost->login_buf->resp.device_name); 3465 } 3466 3467 static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 3468 struct device_attribute *attr, char *buf) 3469 { 3470 struct Scsi_Host *shost = class_to_shost(dev); 3471 struct ibmvfc_host *vhost = shost_priv(shost); 3472 3473 return snprintf(buf, PAGE_SIZE, "%s\n", 3474 vhost->login_buf->resp.port_loc_code); 3475 } 3476 3477 static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 3478 struct device_attribute *attr, char *buf) 3479 { 3480 struct Scsi_Host *shost = class_to_shost(dev); 3481 struct ibmvfc_host *vhost = shost_priv(shost); 3482 3483 return snprintf(buf, PAGE_SIZE, "%s\n", 3484 vhost->login_buf->resp.drc_name); 3485 } 3486 3487 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 3488 struct device_attribute *attr, char *buf) 3489 { 3490 struct Scsi_Host *shost = class_to_shost(dev); 3491 struct ibmvfc_host *vhost = shost_priv(shost); 3492 return snprintf(buf, PAGE_SIZE, "%d\n", be32_to_cpu(vhost->login_buf->resp.version)); 3493 } 3494 3495 static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 3496 struct device_attribute *attr, char *buf) 3497 { 3498 struct Scsi_Host *shost = class_to_shost(dev); 3499 struct ibmvfc_host *vhost = shost_priv(shost); 3500 return snprintf(buf, PAGE_SIZE, "%llx\n", be64_to_cpu(vhost->login_buf->resp.capabilities)); 3501 } 3502 3503 /** 3504 * ibmvfc_show_log_level - Show the adapter's error logging level 3505 * @dev: class device struct 3506 * @attr: unused 3507 * @buf: buffer 3508 * 3509 * Return value: 3510 * number of bytes printed to buffer 3511 **/ 3512 static ssize_t ibmvfc_show_log_level(struct device *dev, 3513 struct device_attribute *attr, char *buf) 3514 { 3515 struct Scsi_Host *shost = class_to_shost(dev); 3516 struct ibmvfc_host *vhost = shost_priv(shost); 3517 unsigned long flags = 0; 3518 int len; 3519 3520 spin_lock_irqsave(shost->host_lock, flags); 3521 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 3522 spin_unlock_irqrestore(shost->host_lock, flags); 3523 return len; 3524 } 3525 3526 /** 3527 * ibmvfc_store_log_level - Change the adapter's error logging level 3528 * @dev: class device struct 3529 * @attr: unused 3530 * @buf: buffer 3531 * @count: buffer size 3532 * 3533 * Return value: 3534 * number of bytes printed to buffer 3535 **/ 3536 static ssize_t ibmvfc_store_log_level(struct device *dev, 3537 struct device_attribute *attr, 3538 const char *buf, size_t count) 3539 { 3540 struct Scsi_Host *shost = class_to_shost(dev); 3541 struct ibmvfc_host *vhost = shost_priv(shost); 3542 unsigned long flags = 0; 3543 3544 spin_lock_irqsave(shost->host_lock, flags); 3545 vhost->log_level = simple_strtoul(buf, NULL, 10); 3546 spin_unlock_irqrestore(shost->host_lock, flags); 3547 return strlen(buf); 3548 } 3549 3550 static ssize_t ibmvfc_show_scsi_channels(struct device *dev, 3551 struct device_attribute *attr, char *buf) 3552 { 3553 struct Scsi_Host *shost = class_to_shost(dev); 3554 struct ibmvfc_host *vhost = shost_priv(shost); 3555 unsigned long flags = 0; 3556 int len; 3557 3558 spin_lock_irqsave(shost->host_lock, flags); 3559 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->client_scsi_channels); 3560 spin_unlock_irqrestore(shost->host_lock, flags); 3561 return len; 3562 } 3563 3564 static ssize_t ibmvfc_store_scsi_channels(struct device *dev, 3565 struct device_attribute *attr, 3566 const char *buf, size_t count) 3567 { 3568 struct Scsi_Host *shost = class_to_shost(dev); 3569 struct ibmvfc_host *vhost = shost_priv(shost); 3570 unsigned long flags = 0; 3571 unsigned int channels; 3572 3573 spin_lock_irqsave(shost->host_lock, flags); 3574 channels = simple_strtoul(buf, NULL, 10); 3575 vhost->client_scsi_channels = min(channels, nr_scsi_hw_queues); 3576 ibmvfc_hard_reset_host(vhost); 3577 spin_unlock_irqrestore(shost->host_lock, flags); 3578 return strlen(buf); 3579 } 3580 3581 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 3582 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 3583 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 3584 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 3585 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 3586 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 3587 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 3588 ibmvfc_show_log_level, ibmvfc_store_log_level); 3589 static DEVICE_ATTR(nr_scsi_channels, S_IRUGO | S_IWUSR, 3590 ibmvfc_show_scsi_channels, ibmvfc_store_scsi_channels); 3591 3592 #ifdef CONFIG_SCSI_IBMVFC_TRACE 3593 /** 3594 * ibmvfc_read_trace - Dump the adapter trace 3595 * @filp: open sysfs file 3596 * @kobj: kobject struct 3597 * @bin_attr: bin_attribute struct 3598 * @buf: buffer 3599 * @off: offset 3600 * @count: buffer size 3601 * 3602 * Return value: 3603 * number of bytes printed to buffer 3604 **/ 3605 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 3606 struct bin_attribute *bin_attr, 3607 char *buf, loff_t off, size_t count) 3608 { 3609 struct device *dev = kobj_to_dev(kobj); 3610 struct Scsi_Host *shost = class_to_shost(dev); 3611 struct ibmvfc_host *vhost = shost_priv(shost); 3612 unsigned long flags = 0; 3613 int size = IBMVFC_TRACE_SIZE; 3614 char *src = (char *)vhost->trace; 3615 3616 if (off > size) 3617 return 0; 3618 if (off + count > size) { 3619 size -= off; 3620 count = size; 3621 } 3622 3623 spin_lock_irqsave(shost->host_lock, flags); 3624 memcpy(buf, &src[off], count); 3625 spin_unlock_irqrestore(shost->host_lock, flags); 3626 return count; 3627 } 3628 3629 static struct bin_attribute ibmvfc_trace_attr = { 3630 .attr = { 3631 .name = "trace", 3632 .mode = S_IRUGO, 3633 }, 3634 .size = 0, 3635 .read = ibmvfc_read_trace, 3636 }; 3637 #endif 3638 3639 static struct attribute *ibmvfc_host_attrs[] = { 3640 &dev_attr_partition_name.attr, 3641 &dev_attr_device_name.attr, 3642 &dev_attr_port_loc_code.attr, 3643 &dev_attr_drc_name.attr, 3644 &dev_attr_npiv_version.attr, 3645 &dev_attr_capabilities.attr, 3646 &dev_attr_log_level.attr, 3647 &dev_attr_nr_scsi_channels.attr, 3648 NULL 3649 }; 3650 3651 ATTRIBUTE_GROUPS(ibmvfc_host); 3652 3653 static const struct scsi_host_template driver_template = { 3654 .module = THIS_MODULE, 3655 .name = "IBM POWER Virtual FC Adapter", 3656 .proc_name = IBMVFC_NAME, 3657 .queuecommand = ibmvfc_queuecommand, 3658 .eh_timed_out = fc_eh_timed_out, 3659 .eh_abort_handler = ibmvfc_eh_abort_handler, 3660 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3661 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3662 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3663 .slave_alloc = ibmvfc_slave_alloc, 3664 .slave_configure = ibmvfc_slave_configure, 3665 .target_alloc = ibmvfc_target_alloc, 3666 .scan_finished = ibmvfc_scan_finished, 3667 .change_queue_depth = ibmvfc_change_queue_depth, 3668 .cmd_per_lun = 16, 3669 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3670 .this_id = -1, 3671 .sg_tablesize = SG_ALL, 3672 .max_sectors = IBMVFC_MAX_SECTORS, 3673 .shost_groups = ibmvfc_host_groups, 3674 .track_queue_depth = 1, 3675 .host_tagset = 1, 3676 }; 3677 3678 /** 3679 * ibmvfc_next_async_crq - Returns the next entry in async queue 3680 * @vhost: ibmvfc host struct 3681 * 3682 * Returns: 3683 * Pointer to next entry in queue / NULL if empty 3684 **/ 3685 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3686 { 3687 struct ibmvfc_queue *async_crq = &vhost->async_crq; 3688 struct ibmvfc_async_crq *crq; 3689 3690 crq = &async_crq->msgs.async[async_crq->cur]; 3691 if (crq->valid & 0x80) { 3692 if (++async_crq->cur == async_crq->size) 3693 async_crq->cur = 0; 3694 rmb(); 3695 } else 3696 crq = NULL; 3697 3698 return crq; 3699 } 3700 3701 /** 3702 * ibmvfc_next_crq - Returns the next entry in message queue 3703 * @vhost: ibmvfc host struct 3704 * 3705 * Returns: 3706 * Pointer to next entry in queue / NULL if empty 3707 **/ 3708 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3709 { 3710 struct ibmvfc_queue *queue = &vhost->crq; 3711 struct ibmvfc_crq *crq; 3712 3713 crq = &queue->msgs.crq[queue->cur]; 3714 if (crq->valid & 0x80) { 3715 if (++queue->cur == queue->size) 3716 queue->cur = 0; 3717 rmb(); 3718 } else 3719 crq = NULL; 3720 3721 return crq; 3722 } 3723 3724 /** 3725 * ibmvfc_interrupt - Interrupt handler 3726 * @irq: number of irq to handle, not used 3727 * @dev_instance: ibmvfc_host that received interrupt 3728 * 3729 * Returns: 3730 * IRQ_HANDLED 3731 **/ 3732 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3733 { 3734 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3735 unsigned long flags; 3736 3737 spin_lock_irqsave(vhost->host->host_lock, flags); 3738 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3739 tasklet_schedule(&vhost->tasklet); 3740 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3741 return IRQ_HANDLED; 3742 } 3743 3744 /** 3745 * ibmvfc_tasklet - Interrupt handler tasklet 3746 * @data: ibmvfc host struct 3747 * 3748 * Returns: 3749 * Nothing 3750 **/ 3751 static void ibmvfc_tasklet(void *data) 3752 { 3753 struct ibmvfc_host *vhost = data; 3754 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3755 struct ibmvfc_crq *crq; 3756 struct ibmvfc_async_crq *async; 3757 struct ibmvfc_event *evt, *temp; 3758 unsigned long flags; 3759 int done = 0; 3760 LIST_HEAD(evt_doneq); 3761 3762 spin_lock_irqsave(vhost->host->host_lock, flags); 3763 spin_lock(vhost->crq.q_lock); 3764 while (!done) { 3765 /* Pull all the valid messages off the async CRQ */ 3766 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3767 ibmvfc_handle_async(async, vhost); 3768 async->valid = 0; 3769 wmb(); 3770 } 3771 3772 /* Pull all the valid messages off the CRQ */ 3773 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3774 ibmvfc_handle_crq(crq, vhost, &evt_doneq); 3775 crq->valid = 0; 3776 wmb(); 3777 } 3778 3779 vio_enable_interrupts(vdev); 3780 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3781 vio_disable_interrupts(vdev); 3782 ibmvfc_handle_async(async, vhost); 3783 async->valid = 0; 3784 wmb(); 3785 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3786 vio_disable_interrupts(vdev); 3787 ibmvfc_handle_crq(crq, vhost, &evt_doneq); 3788 crq->valid = 0; 3789 wmb(); 3790 } else 3791 done = 1; 3792 } 3793 3794 spin_unlock(vhost->crq.q_lock); 3795 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3796 3797 list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) { 3798 del_timer(&evt->timer); 3799 list_del(&evt->queue_list); 3800 ibmvfc_trc_end(evt); 3801 evt->done(evt); 3802 } 3803 } 3804 3805 static int ibmvfc_toggle_scrq_irq(struct ibmvfc_queue *scrq, int enable) 3806 { 3807 struct device *dev = scrq->vhost->dev; 3808 struct vio_dev *vdev = to_vio_dev(dev); 3809 unsigned long rc; 3810 int irq_action = H_ENABLE_VIO_INTERRUPT; 3811 3812 if (!enable) 3813 irq_action = H_DISABLE_VIO_INTERRUPT; 3814 3815 rc = plpar_hcall_norets(H_VIOCTL, vdev->unit_address, irq_action, 3816 scrq->hw_irq, 0, 0); 3817 3818 if (rc) 3819 dev_err(dev, "Couldn't %s sub-crq[%lu] irq. rc=%ld\n", 3820 enable ? "enable" : "disable", scrq->hwq_id, rc); 3821 3822 return rc; 3823 } 3824 3825 static void ibmvfc_handle_scrq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost, 3826 struct list_head *evt_doneq) 3827 { 3828 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 3829 3830 switch (crq->valid) { 3831 case IBMVFC_CRQ_CMD_RSP: 3832 break; 3833 case IBMVFC_CRQ_XPORT_EVENT: 3834 return; 3835 default: 3836 dev_err(vhost->dev, "Got and invalid message type 0x%02x\n", crq->valid); 3837 return; 3838 } 3839 3840 /* The only kind of payload CRQs we should get are responses to 3841 * things we send. Make sure this response is to something we 3842 * actually sent 3843 */ 3844 if (unlikely(!ibmvfc_valid_event(&evt->queue->evt_pool, evt))) { 3845 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 3846 crq->ioba); 3847 return; 3848 } 3849 3850 if (unlikely(atomic_dec_if_positive(&evt->active))) { 3851 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 3852 crq->ioba); 3853 return; 3854 } 3855 3856 spin_lock(&evt->queue->l_lock); 3857 list_move_tail(&evt->queue_list, evt_doneq); 3858 spin_unlock(&evt->queue->l_lock); 3859 } 3860 3861 static struct ibmvfc_crq *ibmvfc_next_scrq(struct ibmvfc_queue *scrq) 3862 { 3863 struct ibmvfc_crq *crq; 3864 3865 crq = &scrq->msgs.scrq[scrq->cur].crq; 3866 if (crq->valid & 0x80) { 3867 if (++scrq->cur == scrq->size) 3868 scrq->cur = 0; 3869 rmb(); 3870 } else 3871 crq = NULL; 3872 3873 return crq; 3874 } 3875 3876 static void ibmvfc_drain_sub_crq(struct ibmvfc_queue *scrq) 3877 { 3878 struct ibmvfc_crq *crq; 3879 struct ibmvfc_event *evt, *temp; 3880 unsigned long flags; 3881 int done = 0; 3882 LIST_HEAD(evt_doneq); 3883 3884 spin_lock_irqsave(scrq->q_lock, flags); 3885 while (!done) { 3886 while ((crq = ibmvfc_next_scrq(scrq)) != NULL) { 3887 ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq); 3888 crq->valid = 0; 3889 wmb(); 3890 } 3891 3892 ibmvfc_toggle_scrq_irq(scrq, 1); 3893 if ((crq = ibmvfc_next_scrq(scrq)) != NULL) { 3894 ibmvfc_toggle_scrq_irq(scrq, 0); 3895 ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq); 3896 crq->valid = 0; 3897 wmb(); 3898 } else 3899 done = 1; 3900 } 3901 spin_unlock_irqrestore(scrq->q_lock, flags); 3902 3903 list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) { 3904 del_timer(&evt->timer); 3905 list_del(&evt->queue_list); 3906 ibmvfc_trc_end(evt); 3907 evt->done(evt); 3908 } 3909 } 3910 3911 static irqreturn_t ibmvfc_interrupt_scsi(int irq, void *scrq_instance) 3912 { 3913 struct ibmvfc_queue *scrq = (struct ibmvfc_queue *)scrq_instance; 3914 3915 ibmvfc_toggle_scrq_irq(scrq, 0); 3916 ibmvfc_drain_sub_crq(scrq); 3917 3918 return IRQ_HANDLED; 3919 } 3920 3921 /** 3922 * ibmvfc_init_tgt - Set the next init job step for the target 3923 * @tgt: ibmvfc target struct 3924 * @job_step: job step to perform 3925 * 3926 **/ 3927 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3928 void (*job_step) (struct ibmvfc_target *)) 3929 { 3930 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT)) 3931 tgt->job_step = job_step; 3932 wake_up(&tgt->vhost->work_wait_q); 3933 } 3934 3935 /** 3936 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3937 * @tgt: ibmvfc target struct 3938 * @job_step: initialization job step 3939 * 3940 * Returns: 1 if step will be retried / 0 if not 3941 * 3942 **/ 3943 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3944 void (*job_step) (struct ibmvfc_target *)) 3945 { 3946 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3947 ibmvfc_del_tgt(tgt); 3948 wake_up(&tgt->vhost->work_wait_q); 3949 return 0; 3950 } else 3951 ibmvfc_init_tgt(tgt, job_step); 3952 return 1; 3953 } 3954 3955 /* Defined in FC-LS */ 3956 static const struct { 3957 int code; 3958 int retry; 3959 int logged_in; 3960 } prli_rsp [] = { 3961 { 0, 1, 0 }, 3962 { 1, 0, 1 }, 3963 { 2, 1, 0 }, 3964 { 3, 1, 0 }, 3965 { 4, 0, 0 }, 3966 { 5, 0, 0 }, 3967 { 6, 0, 1 }, 3968 { 7, 0, 0 }, 3969 { 8, 1, 0 }, 3970 }; 3971 3972 /** 3973 * ibmvfc_get_prli_rsp - Find PRLI response index 3974 * @flags: PRLI response flags 3975 * 3976 **/ 3977 static int ibmvfc_get_prli_rsp(u16 flags) 3978 { 3979 int i; 3980 int code = (flags & 0x0f00) >> 8; 3981 3982 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3983 if (prli_rsp[i].code == code) 3984 return i; 3985 3986 return 0; 3987 } 3988 3989 /** 3990 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3991 * @evt: ibmvfc event struct 3992 * 3993 **/ 3994 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3995 { 3996 struct ibmvfc_target *tgt = evt->tgt; 3997 struct ibmvfc_host *vhost = evt->vhost; 3998 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3999 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 4000 u32 status = be16_to_cpu(rsp->common.status); 4001 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 4002 4003 vhost->discovery_threads--; 4004 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4005 switch (status) { 4006 case IBMVFC_MAD_SUCCESS: 4007 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 4008 parms->type, parms->flags, parms->service_parms); 4009 4010 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 4011 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); 4012 if (prli_rsp[index].logged_in) { 4013 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { 4014 tgt->need_login = 0; 4015 tgt->ids.roles = 0; 4016 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) 4017 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 4018 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) 4019 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 4020 tgt->add_rport = 1; 4021 } else 4022 ibmvfc_del_tgt(tgt); 4023 } else if (prli_rsp[index].retry) 4024 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 4025 else 4026 ibmvfc_del_tgt(tgt); 4027 } else 4028 ibmvfc_del_tgt(tgt); 4029 break; 4030 case IBMVFC_MAD_DRIVER_FAILED: 4031 break; 4032 case IBMVFC_MAD_CRQ_ERROR: 4033 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 4034 break; 4035 case IBMVFC_MAD_FAILED: 4036 default: 4037 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && 4038 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) 4039 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 4040 else if (tgt->logo_rcvd) 4041 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 4042 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4043 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 4044 else 4045 ibmvfc_del_tgt(tgt); 4046 4047 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 4048 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4049 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), status); 4050 break; 4051 } 4052 4053 kref_put(&tgt->kref, ibmvfc_release_tgt); 4054 ibmvfc_free_event(evt); 4055 wake_up(&vhost->work_wait_q); 4056 } 4057 4058 /** 4059 * ibmvfc_tgt_send_prli - Send a process login 4060 * @tgt: ibmvfc target struct 4061 * 4062 **/ 4063 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 4064 { 4065 struct ibmvfc_process_login *prli; 4066 struct ibmvfc_host *vhost = tgt->vhost; 4067 struct ibmvfc_event *evt; 4068 4069 if (vhost->discovery_threads >= disc_threads) 4070 return; 4071 4072 kref_get(&tgt->kref); 4073 evt = ibmvfc_get_event(&vhost->crq); 4074 if (!evt) { 4075 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4076 kref_put(&tgt->kref, ibmvfc_release_tgt); 4077 __ibmvfc_reset_host(vhost); 4078 return; 4079 } 4080 vhost->discovery_threads++; 4081 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 4082 evt->tgt = tgt; 4083 prli = &evt->iu.prli; 4084 memset(prli, 0, sizeof(*prli)); 4085 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 4086 prli->common.version = cpu_to_be32(2); 4087 prli->target_wwpn = cpu_to_be64(tgt->wwpn); 4088 } else { 4089 prli->common.version = cpu_to_be32(1); 4090 } 4091 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); 4092 prli->common.length = cpu_to_be16(sizeof(*prli)); 4093 prli->scsi_id = cpu_to_be64(tgt->scsi_id); 4094 4095 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 4096 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); 4097 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); 4098 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED); 4099 4100 if (cls3_error) 4101 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY); 4102 4103 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4104 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4105 vhost->discovery_threads--; 4106 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4107 kref_put(&tgt->kref, ibmvfc_release_tgt); 4108 } else 4109 tgt_dbg(tgt, "Sent process login\n"); 4110 } 4111 4112 /** 4113 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 4114 * @evt: ibmvfc event struct 4115 * 4116 **/ 4117 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 4118 { 4119 struct ibmvfc_target *tgt = evt->tgt; 4120 struct ibmvfc_host *vhost = evt->vhost; 4121 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 4122 u32 status = be16_to_cpu(rsp->common.status); 4123 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4124 4125 vhost->discovery_threads--; 4126 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4127 switch (status) { 4128 case IBMVFC_MAD_SUCCESS: 4129 tgt_dbg(tgt, "Port Login succeeded\n"); 4130 if (tgt->ids.port_name && 4131 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 4132 vhost->reinit = 1; 4133 tgt_dbg(tgt, "Port re-init required\n"); 4134 break; 4135 } 4136 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 4137 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 4138 tgt->ids.port_id = tgt->scsi_id; 4139 memcpy(&tgt->service_parms, &rsp->service_parms, 4140 sizeof(tgt->service_parms)); 4141 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 4142 sizeof(tgt->service_parms_change)); 4143 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 4144 break; 4145 case IBMVFC_MAD_DRIVER_FAILED: 4146 break; 4147 case IBMVFC_MAD_CRQ_ERROR: 4148 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 4149 break; 4150 case IBMVFC_MAD_FAILED: 4151 default: 4152 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4153 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 4154 else 4155 ibmvfc_del_tgt(tgt); 4156 4157 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 4158 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4159 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), 4160 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), 4161 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status); 4162 break; 4163 } 4164 4165 kref_put(&tgt->kref, ibmvfc_release_tgt); 4166 ibmvfc_free_event(evt); 4167 wake_up(&vhost->work_wait_q); 4168 } 4169 4170 /** 4171 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 4172 * @tgt: ibmvfc target struct 4173 * 4174 **/ 4175 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 4176 { 4177 struct ibmvfc_port_login *plogi; 4178 struct ibmvfc_host *vhost = tgt->vhost; 4179 struct ibmvfc_event *evt; 4180 4181 if (vhost->discovery_threads >= disc_threads) 4182 return; 4183 4184 kref_get(&tgt->kref); 4185 tgt->logo_rcvd = 0; 4186 evt = ibmvfc_get_event(&vhost->crq); 4187 if (!evt) { 4188 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4189 kref_put(&tgt->kref, ibmvfc_release_tgt); 4190 __ibmvfc_reset_host(vhost); 4191 return; 4192 } 4193 vhost->discovery_threads++; 4194 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4195 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 4196 evt->tgt = tgt; 4197 plogi = &evt->iu.plogi; 4198 memset(plogi, 0, sizeof(*plogi)); 4199 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 4200 plogi->common.version = cpu_to_be32(2); 4201 plogi->target_wwpn = cpu_to_be64(tgt->wwpn); 4202 } else { 4203 plogi->common.version = cpu_to_be32(1); 4204 } 4205 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 4206 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 4207 plogi->scsi_id = cpu_to_be64(tgt->scsi_id); 4208 4209 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4210 vhost->discovery_threads--; 4211 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4212 kref_put(&tgt->kref, ibmvfc_release_tgt); 4213 } else 4214 tgt_dbg(tgt, "Sent port login\n"); 4215 } 4216 4217 /** 4218 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 4219 * @evt: ibmvfc event struct 4220 * 4221 **/ 4222 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 4223 { 4224 struct ibmvfc_target *tgt = evt->tgt; 4225 struct ibmvfc_host *vhost = evt->vhost; 4226 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 4227 u32 status = be16_to_cpu(rsp->common.status); 4228 4229 vhost->discovery_threads--; 4230 ibmvfc_free_event(evt); 4231 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4232 4233 switch (status) { 4234 case IBMVFC_MAD_SUCCESS: 4235 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 4236 break; 4237 case IBMVFC_MAD_DRIVER_FAILED: 4238 kref_put(&tgt->kref, ibmvfc_release_tgt); 4239 wake_up(&vhost->work_wait_q); 4240 return; 4241 case IBMVFC_MAD_FAILED: 4242 default: 4243 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 4244 break; 4245 } 4246 4247 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 4248 kref_put(&tgt->kref, ibmvfc_release_tgt); 4249 wake_up(&vhost->work_wait_q); 4250 } 4251 4252 /** 4253 * __ibmvfc_tgt_get_implicit_logout_evt - Allocate and init an event for implicit logout 4254 * @tgt: ibmvfc target struct 4255 * @done: Routine to call when the event is responded to 4256 * 4257 * Returns: 4258 * Allocated and initialized ibmvfc_event struct 4259 **/ 4260 static struct ibmvfc_event *__ibmvfc_tgt_get_implicit_logout_evt(struct ibmvfc_target *tgt, 4261 void (*done) (struct ibmvfc_event *)) 4262 { 4263 struct ibmvfc_implicit_logout *mad; 4264 struct ibmvfc_host *vhost = tgt->vhost; 4265 struct ibmvfc_event *evt; 4266 4267 kref_get(&tgt->kref); 4268 evt = ibmvfc_get_event(&vhost->crq); 4269 if (!evt) 4270 return NULL; 4271 ibmvfc_init_event(evt, done, IBMVFC_MAD_FORMAT); 4272 evt->tgt = tgt; 4273 mad = &evt->iu.implicit_logout; 4274 memset(mad, 0, sizeof(*mad)); 4275 mad->common.version = cpu_to_be32(1); 4276 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); 4277 mad->common.length = cpu_to_be16(sizeof(*mad)); 4278 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); 4279 return evt; 4280 } 4281 4282 /** 4283 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 4284 * @tgt: ibmvfc target struct 4285 * 4286 **/ 4287 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 4288 { 4289 struct ibmvfc_host *vhost = tgt->vhost; 4290 struct ibmvfc_event *evt; 4291 4292 if (vhost->discovery_threads >= disc_threads) 4293 return; 4294 4295 vhost->discovery_threads++; 4296 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, 4297 ibmvfc_tgt_implicit_logout_done); 4298 if (!evt) { 4299 vhost->discovery_threads--; 4300 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4301 kref_put(&tgt->kref, ibmvfc_release_tgt); 4302 __ibmvfc_reset_host(vhost); 4303 return; 4304 } 4305 4306 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4307 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4308 vhost->discovery_threads--; 4309 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4310 kref_put(&tgt->kref, ibmvfc_release_tgt); 4311 } else 4312 tgt_dbg(tgt, "Sent Implicit Logout\n"); 4313 } 4314 4315 /** 4316 * ibmvfc_tgt_implicit_logout_and_del_done - Completion handler for Implicit Logout MAD 4317 * @evt: ibmvfc event struct 4318 * 4319 **/ 4320 static void ibmvfc_tgt_implicit_logout_and_del_done(struct ibmvfc_event *evt) 4321 { 4322 struct ibmvfc_target *tgt = evt->tgt; 4323 struct ibmvfc_host *vhost = evt->vhost; 4324 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 4325 u32 status = be16_to_cpu(mad->common.status); 4326 4327 vhost->discovery_threads--; 4328 ibmvfc_free_event(evt); 4329 4330 /* 4331 * If our state is IBMVFC_HOST_OFFLINE, we could be unloading the 4332 * driver in which case we need to free up all the targets. If we are 4333 * not unloading, we will still go through a hard reset to get out of 4334 * offline state, so there is no need to track the old targets in that 4335 * case. 4336 */ 4337 if (status == IBMVFC_MAD_SUCCESS || vhost->state == IBMVFC_HOST_OFFLINE) 4338 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4339 else 4340 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT); 4341 4342 tgt_dbg(tgt, "Implicit Logout %s\n", (status == IBMVFC_MAD_SUCCESS) ? "succeeded" : "failed"); 4343 kref_put(&tgt->kref, ibmvfc_release_tgt); 4344 wake_up(&vhost->work_wait_q); 4345 } 4346 4347 /** 4348 * ibmvfc_tgt_implicit_logout_and_del - Initiate an Implicit Logout for specified target 4349 * @tgt: ibmvfc target struct 4350 * 4351 **/ 4352 static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *tgt) 4353 { 4354 struct ibmvfc_host *vhost = tgt->vhost; 4355 struct ibmvfc_event *evt; 4356 4357 if (!vhost->logged_in) { 4358 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4359 return; 4360 } 4361 4362 if (vhost->discovery_threads >= disc_threads) 4363 return; 4364 4365 vhost->discovery_threads++; 4366 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, 4367 ibmvfc_tgt_implicit_logout_and_del_done); 4368 4369 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT); 4370 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4371 vhost->discovery_threads--; 4372 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4373 kref_put(&tgt->kref, ibmvfc_release_tgt); 4374 } else 4375 tgt_dbg(tgt, "Sent Implicit Logout\n"); 4376 } 4377 4378 /** 4379 * ibmvfc_tgt_move_login_done - Completion handler for Move Login 4380 * @evt: ibmvfc event struct 4381 * 4382 **/ 4383 static void ibmvfc_tgt_move_login_done(struct ibmvfc_event *evt) 4384 { 4385 struct ibmvfc_target *tgt = evt->tgt; 4386 struct ibmvfc_host *vhost = evt->vhost; 4387 struct ibmvfc_move_login *rsp = &evt->xfer_iu->move_login; 4388 u32 status = be16_to_cpu(rsp->common.status); 4389 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4390 4391 vhost->discovery_threads--; 4392 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4393 switch (status) { 4394 case IBMVFC_MAD_SUCCESS: 4395 tgt_dbg(tgt, "Move Login succeeded for new scsi_id: %llX\n", tgt->new_scsi_id); 4396 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 4397 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 4398 tgt->scsi_id = tgt->new_scsi_id; 4399 tgt->ids.port_id = tgt->scsi_id; 4400 memcpy(&tgt->service_parms, &rsp->service_parms, 4401 sizeof(tgt->service_parms)); 4402 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 4403 sizeof(tgt->service_parms_change)); 4404 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 4405 break; 4406 case IBMVFC_MAD_DRIVER_FAILED: 4407 break; 4408 case IBMVFC_MAD_CRQ_ERROR: 4409 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); 4410 break; 4411 case IBMVFC_MAD_FAILED: 4412 default: 4413 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); 4414 4415 tgt_log(tgt, level, 4416 "Move Login failed: new scsi_id: %llX, flags:%x, vios_flags:%x, rc=0x%02X\n", 4417 tgt->new_scsi_id, be32_to_cpu(rsp->flags), be16_to_cpu(rsp->vios_flags), 4418 status); 4419 break; 4420 } 4421 4422 kref_put(&tgt->kref, ibmvfc_release_tgt); 4423 ibmvfc_free_event(evt); 4424 wake_up(&vhost->work_wait_q); 4425 } 4426 4427 4428 /** 4429 * ibmvfc_tgt_move_login - Initiate a move login for specified target 4430 * @tgt: ibmvfc target struct 4431 * 4432 **/ 4433 static void ibmvfc_tgt_move_login(struct ibmvfc_target *tgt) 4434 { 4435 struct ibmvfc_host *vhost = tgt->vhost; 4436 struct ibmvfc_move_login *move; 4437 struct ibmvfc_event *evt; 4438 4439 if (vhost->discovery_threads >= disc_threads) 4440 return; 4441 4442 kref_get(&tgt->kref); 4443 evt = ibmvfc_get_event(&vhost->crq); 4444 if (!evt) { 4445 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4446 kref_put(&tgt->kref, ibmvfc_release_tgt); 4447 __ibmvfc_reset_host(vhost); 4448 return; 4449 } 4450 vhost->discovery_threads++; 4451 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4452 ibmvfc_init_event(evt, ibmvfc_tgt_move_login_done, IBMVFC_MAD_FORMAT); 4453 evt->tgt = tgt; 4454 move = &evt->iu.move_login; 4455 memset(move, 0, sizeof(*move)); 4456 move->common.version = cpu_to_be32(1); 4457 move->common.opcode = cpu_to_be32(IBMVFC_MOVE_LOGIN); 4458 move->common.length = cpu_to_be16(sizeof(*move)); 4459 4460 move->old_scsi_id = cpu_to_be64(tgt->scsi_id); 4461 move->new_scsi_id = cpu_to_be64(tgt->new_scsi_id); 4462 move->wwpn = cpu_to_be64(tgt->wwpn); 4463 move->node_name = cpu_to_be64(tgt->ids.node_name); 4464 4465 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4466 vhost->discovery_threads--; 4467 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4468 kref_put(&tgt->kref, ibmvfc_release_tgt); 4469 } else 4470 tgt_dbg(tgt, "Sent Move Login for new scsi_id: %llX\n", tgt->new_scsi_id); 4471 } 4472 4473 /** 4474 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 4475 * @mad: ibmvfc passthru mad struct 4476 * @tgt: ibmvfc target struct 4477 * 4478 * Returns: 4479 * 1 if PLOGI needed / 0 if PLOGI not needed 4480 **/ 4481 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 4482 struct ibmvfc_target *tgt) 4483 { 4484 if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name) 4485 return 1; 4486 if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name) 4487 return 1; 4488 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) 4489 return 1; 4490 return 0; 4491 } 4492 4493 /** 4494 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 4495 * @evt: ibmvfc event struct 4496 * 4497 **/ 4498 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 4499 { 4500 struct ibmvfc_target *tgt = evt->tgt; 4501 struct ibmvfc_host *vhost = evt->vhost; 4502 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 4503 u32 status = be16_to_cpu(mad->common.status); 4504 u8 fc_reason, fc_explain; 4505 4506 vhost->discovery_threads--; 4507 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4508 del_timer(&tgt->timer); 4509 4510 switch (status) { 4511 case IBMVFC_MAD_SUCCESS: 4512 tgt_dbg(tgt, "ADISC succeeded\n"); 4513 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 4514 ibmvfc_del_tgt(tgt); 4515 break; 4516 case IBMVFC_MAD_DRIVER_FAILED: 4517 break; 4518 case IBMVFC_MAD_FAILED: 4519 default: 4520 ibmvfc_del_tgt(tgt); 4521 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; 4522 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; 4523 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 4524 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), 4525 be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error), 4526 ibmvfc_get_fc_type(fc_reason), fc_reason, 4527 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 4528 break; 4529 } 4530 4531 kref_put(&tgt->kref, ibmvfc_release_tgt); 4532 ibmvfc_free_event(evt); 4533 wake_up(&vhost->work_wait_q); 4534 } 4535 4536 /** 4537 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 4538 * @evt: ibmvfc event struct 4539 * 4540 **/ 4541 static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 4542 { 4543 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 4544 4545 memset(mad, 0, sizeof(*mad)); 4546 mad->common.version = cpu_to_be32(1); 4547 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 4548 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 4549 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 4550 offsetof(struct ibmvfc_passthru_mad, iu)); 4551 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 4552 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 4553 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); 4554 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 4555 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 4556 offsetof(struct ibmvfc_passthru_fc_iu, payload)); 4557 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 4558 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 4559 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 4560 offsetof(struct ibmvfc_passthru_fc_iu, response)); 4561 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); 4562 } 4563 4564 /** 4565 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 4566 * @evt: ibmvfc event struct 4567 * 4568 * Just cleanup this event struct. Everything else is handled by 4569 * the ADISC completion handler. If the ADISC never actually comes 4570 * back, we still have the timer running on the ADISC event struct 4571 * which will fire and cause the CRQ to get reset. 4572 * 4573 **/ 4574 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 4575 { 4576 struct ibmvfc_host *vhost = evt->vhost; 4577 struct ibmvfc_target *tgt = evt->tgt; 4578 4579 tgt_dbg(tgt, "ADISC cancel complete\n"); 4580 vhost->abort_threads--; 4581 ibmvfc_free_event(evt); 4582 kref_put(&tgt->kref, ibmvfc_release_tgt); 4583 wake_up(&vhost->work_wait_q); 4584 } 4585 4586 /** 4587 * ibmvfc_adisc_timeout - Handle an ADISC timeout 4588 * @t: ibmvfc target struct 4589 * 4590 * If an ADISC times out, send a cancel. If the cancel times 4591 * out, reset the CRQ. When the ADISC comes back as cancelled, 4592 * log back into the target. 4593 **/ 4594 static void ibmvfc_adisc_timeout(struct timer_list *t) 4595 { 4596 struct ibmvfc_target *tgt = from_timer(tgt, t, timer); 4597 struct ibmvfc_host *vhost = tgt->vhost; 4598 struct ibmvfc_event *evt; 4599 struct ibmvfc_tmf *tmf; 4600 unsigned long flags; 4601 int rc; 4602 4603 tgt_dbg(tgt, "ADISC timeout\n"); 4604 spin_lock_irqsave(vhost->host->host_lock, flags); 4605 if (vhost->abort_threads >= disc_threads || 4606 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 4607 vhost->state != IBMVFC_INITIALIZING || 4608 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 4609 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4610 return; 4611 } 4612 4613 vhost->abort_threads++; 4614 kref_get(&tgt->kref); 4615 evt = ibmvfc_get_event(&vhost->crq); 4616 if (!evt) { 4617 tgt_err(tgt, "Failed to get cancel event for ADISC.\n"); 4618 vhost->abort_threads--; 4619 kref_put(&tgt->kref, ibmvfc_release_tgt); 4620 __ibmvfc_reset_host(vhost); 4621 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4622 return; 4623 } 4624 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 4625 4626 evt->tgt = tgt; 4627 tmf = &evt->iu.tmf; 4628 memset(tmf, 0, sizeof(*tmf)); 4629 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 4630 tmf->common.version = cpu_to_be32(2); 4631 tmf->target_wwpn = cpu_to_be64(tgt->wwpn); 4632 } else { 4633 tmf->common.version = cpu_to_be32(1); 4634 } 4635 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 4636 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 4637 tmf->scsi_id = cpu_to_be64(tgt->scsi_id); 4638 tmf->cancel_key = cpu_to_be32(tgt->cancel_key); 4639 4640 rc = ibmvfc_send_event(evt, vhost, default_timeout); 4641 4642 if (rc) { 4643 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 4644 vhost->abort_threads--; 4645 kref_put(&tgt->kref, ibmvfc_release_tgt); 4646 __ibmvfc_reset_host(vhost); 4647 } else 4648 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 4649 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4650 } 4651 4652 /** 4653 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 4654 * @tgt: ibmvfc target struct 4655 * 4656 * When sending an ADISC we end up with two timers running. The 4657 * first timer is the timer in the ibmvfc target struct. If this 4658 * fires, we send a cancel to the target. The second timer is the 4659 * timer on the ibmvfc event for the ADISC, which is longer. If that 4660 * fires, it means the ADISC timed out and our attempt to cancel it 4661 * also failed, so we need to reset the CRQ. 4662 **/ 4663 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 4664 { 4665 struct ibmvfc_passthru_mad *mad; 4666 struct ibmvfc_host *vhost = tgt->vhost; 4667 struct ibmvfc_event *evt; 4668 4669 if (vhost->discovery_threads >= disc_threads) 4670 return; 4671 4672 kref_get(&tgt->kref); 4673 evt = ibmvfc_get_event(&vhost->crq); 4674 if (!evt) { 4675 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4676 kref_put(&tgt->kref, ibmvfc_release_tgt); 4677 __ibmvfc_reset_host(vhost); 4678 return; 4679 } 4680 vhost->discovery_threads++; 4681 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 4682 evt->tgt = tgt; 4683 4684 ibmvfc_init_passthru(evt); 4685 mad = &evt->iu.passthru; 4686 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); 4687 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); 4688 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); 4689 4690 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); 4691 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 4692 sizeof(vhost->login_buf->resp.port_name)); 4693 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 4694 sizeof(vhost->login_buf->resp.node_name)); 4695 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); 4696 4697 if (timer_pending(&tgt->timer)) 4698 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 4699 else { 4700 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 4701 add_timer(&tgt->timer); 4702 } 4703 4704 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4705 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 4706 vhost->discovery_threads--; 4707 del_timer(&tgt->timer); 4708 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4709 kref_put(&tgt->kref, ibmvfc_release_tgt); 4710 } else 4711 tgt_dbg(tgt, "Sent ADISC\n"); 4712 } 4713 4714 /** 4715 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 4716 * @evt: ibmvfc event struct 4717 * 4718 **/ 4719 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 4720 { 4721 struct ibmvfc_target *tgt = evt->tgt; 4722 struct ibmvfc_host *vhost = evt->vhost; 4723 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 4724 u32 status = be16_to_cpu(rsp->common.status); 4725 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4726 4727 vhost->discovery_threads--; 4728 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4729 switch (status) { 4730 case IBMVFC_MAD_SUCCESS: 4731 tgt_dbg(tgt, "Query Target succeeded\n"); 4732 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) 4733 ibmvfc_del_tgt(tgt); 4734 else 4735 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 4736 break; 4737 case IBMVFC_MAD_DRIVER_FAILED: 4738 break; 4739 case IBMVFC_MAD_CRQ_ERROR: 4740 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 4741 break; 4742 case IBMVFC_MAD_FAILED: 4743 default: 4744 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 4745 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && 4746 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) 4747 ibmvfc_del_tgt(tgt); 4748 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4749 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 4750 else 4751 ibmvfc_del_tgt(tgt); 4752 4753 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 4754 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4755 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), 4756 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), 4757 ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), 4758 status); 4759 break; 4760 } 4761 4762 kref_put(&tgt->kref, ibmvfc_release_tgt); 4763 ibmvfc_free_event(evt); 4764 wake_up(&vhost->work_wait_q); 4765 } 4766 4767 /** 4768 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 4769 * @tgt: ibmvfc target struct 4770 * 4771 **/ 4772 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 4773 { 4774 struct ibmvfc_query_tgt *query_tgt; 4775 struct ibmvfc_host *vhost = tgt->vhost; 4776 struct ibmvfc_event *evt; 4777 4778 if (vhost->discovery_threads >= disc_threads) 4779 return; 4780 4781 kref_get(&tgt->kref); 4782 evt = ibmvfc_get_event(&vhost->crq); 4783 if (!evt) { 4784 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4785 kref_put(&tgt->kref, ibmvfc_release_tgt); 4786 __ibmvfc_reset_host(vhost); 4787 return; 4788 } 4789 vhost->discovery_threads++; 4790 evt->tgt = tgt; 4791 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 4792 query_tgt = &evt->iu.query_tgt; 4793 memset(query_tgt, 0, sizeof(*query_tgt)); 4794 query_tgt->common.version = cpu_to_be32(1); 4795 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); 4796 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); 4797 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); 4798 4799 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4800 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4801 vhost->discovery_threads--; 4802 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4803 kref_put(&tgt->kref, ibmvfc_release_tgt); 4804 } else 4805 tgt_dbg(tgt, "Sent Query Target\n"); 4806 } 4807 4808 /** 4809 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 4810 * @vhost: ibmvfc host struct 4811 * @target: Holds SCSI ID to allocate target forand the WWPN 4812 * 4813 * Returns: 4814 * 0 on success / other on failure 4815 **/ 4816 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, 4817 struct ibmvfc_discover_targets_entry *target) 4818 { 4819 struct ibmvfc_target *stgt = NULL; 4820 struct ibmvfc_target *wtgt = NULL; 4821 struct ibmvfc_target *tgt; 4822 unsigned long flags; 4823 u64 scsi_id = be32_to_cpu(target->scsi_id) & IBMVFC_DISC_TGT_SCSI_ID_MASK; 4824 u64 wwpn = be64_to_cpu(target->wwpn); 4825 4826 /* Look to see if we already have a target allocated for this SCSI ID or WWPN */ 4827 spin_lock_irqsave(vhost->host->host_lock, flags); 4828 list_for_each_entry(tgt, &vhost->targets, queue) { 4829 if (tgt->wwpn == wwpn) { 4830 wtgt = tgt; 4831 break; 4832 } 4833 } 4834 4835 list_for_each_entry(tgt, &vhost->targets, queue) { 4836 if (tgt->scsi_id == scsi_id) { 4837 stgt = tgt; 4838 break; 4839 } 4840 } 4841 4842 if (wtgt && !stgt) { 4843 /* 4844 * A WWPN target has moved and we still are tracking the old 4845 * SCSI ID. The only way we should be able to get here is if 4846 * we attempted to send an implicit logout for the old SCSI ID 4847 * and it failed for some reason, such as there being I/O 4848 * pending to the target. In this case, we will have already 4849 * deleted the rport from the FC transport so we do a move 4850 * login, which works even with I/O pending, however, if 4851 * there is still I/O pending, it will stay outstanding, so 4852 * we only do this if fast fail is disabled for the rport, 4853 * otherwise we let terminate_rport_io clean up the port 4854 * before we login at the new location. 4855 */ 4856 if (wtgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 4857 if (wtgt->move_login) { 4858 /* 4859 * Do a move login here. The old target is no longer 4860 * known to the transport layer We don't use the 4861 * normal ibmvfc_set_tgt_action to set this, as we 4862 * don't normally want to allow this state change. 4863 */ 4864 wtgt->new_scsi_id = scsi_id; 4865 wtgt->action = IBMVFC_TGT_ACTION_INIT; 4866 wtgt->init_retries = 0; 4867 ibmvfc_init_tgt(wtgt, ibmvfc_tgt_move_login); 4868 } 4869 goto unlock_out; 4870 } else { 4871 tgt_err(wtgt, "Unexpected target state: %d, %p\n", 4872 wtgt->action, wtgt->rport); 4873 } 4874 } else if (stgt) { 4875 if (tgt->need_login) 4876 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 4877 goto unlock_out; 4878 } 4879 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4880 4881 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 4882 memset(tgt, 0, sizeof(*tgt)); 4883 tgt->scsi_id = scsi_id; 4884 tgt->wwpn = wwpn; 4885 tgt->vhost = vhost; 4886 tgt->need_login = 1; 4887 timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0); 4888 kref_init(&tgt->kref); 4889 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 4890 spin_lock_irqsave(vhost->host->host_lock, flags); 4891 tgt->cancel_key = vhost->task_set++; 4892 list_add_tail(&tgt->queue, &vhost->targets); 4893 4894 unlock_out: 4895 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4896 return 0; 4897 } 4898 4899 /** 4900 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 4901 * @vhost: ibmvfc host struct 4902 * 4903 * Returns: 4904 * 0 on success / other on failure 4905 **/ 4906 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 4907 { 4908 int i, rc; 4909 4910 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 4911 rc = ibmvfc_alloc_target(vhost, &vhost->disc_buf[i]); 4912 4913 return rc; 4914 } 4915 4916 /** 4917 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 4918 * @evt: ibmvfc event struct 4919 * 4920 **/ 4921 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 4922 { 4923 struct ibmvfc_host *vhost = evt->vhost; 4924 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 4925 u32 mad_status = be16_to_cpu(rsp->common.status); 4926 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4927 4928 switch (mad_status) { 4929 case IBMVFC_MAD_SUCCESS: 4930 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 4931 vhost->num_targets = be32_to_cpu(rsp->num_written); 4932 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 4933 break; 4934 case IBMVFC_MAD_FAILED: 4935 level += ibmvfc_retry_host_init(vhost); 4936 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 4937 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4938 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); 4939 break; 4940 case IBMVFC_MAD_DRIVER_FAILED: 4941 break; 4942 default: 4943 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 4944 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4945 break; 4946 } 4947 4948 ibmvfc_free_event(evt); 4949 wake_up(&vhost->work_wait_q); 4950 } 4951 4952 /** 4953 * ibmvfc_discover_targets - Send Discover Targets MAD 4954 * @vhost: ibmvfc host struct 4955 * 4956 **/ 4957 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 4958 { 4959 struct ibmvfc_discover_targets *mad; 4960 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); 4961 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4962 4963 if (!evt) { 4964 ibmvfc_log(vhost, level, "Discover Targets failed: no available events\n"); 4965 ibmvfc_hard_reset_host(vhost); 4966 return; 4967 } 4968 4969 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 4970 mad = &evt->iu.discover_targets; 4971 memset(mad, 0, sizeof(*mad)); 4972 mad->common.version = cpu_to_be32(1); 4973 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); 4974 mad->common.length = cpu_to_be16(sizeof(*mad)); 4975 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz); 4976 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma); 4977 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz); 4978 mad->flags = cpu_to_be32(IBMVFC_DISC_TGT_PORT_ID_WWPN_LIST); 4979 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4980 4981 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4982 ibmvfc_dbg(vhost, "Sent discover targets\n"); 4983 else 4984 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4985 } 4986 4987 static void ibmvfc_channel_setup_done(struct ibmvfc_event *evt) 4988 { 4989 struct ibmvfc_host *vhost = evt->vhost; 4990 struct ibmvfc_channel_setup *setup = vhost->channel_setup_buf; 4991 struct ibmvfc_scsi_channels *scrqs = &vhost->scsi_scrqs; 4992 u32 mad_status = be16_to_cpu(evt->xfer_iu->channel_setup.common.status); 4993 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4994 int flags, active_queues, i; 4995 4996 ibmvfc_free_event(evt); 4997 4998 switch (mad_status) { 4999 case IBMVFC_MAD_SUCCESS: 5000 ibmvfc_dbg(vhost, "Channel Setup succeeded\n"); 5001 flags = be32_to_cpu(setup->flags); 5002 vhost->do_enquiry = 0; 5003 active_queues = be32_to_cpu(setup->num_scsi_subq_channels); 5004 scrqs->active_queues = active_queues; 5005 5006 if (flags & IBMVFC_CHANNELS_CANCELED) { 5007 ibmvfc_dbg(vhost, "Channels Canceled\n"); 5008 vhost->using_channels = 0; 5009 } else { 5010 if (active_queues) 5011 vhost->using_channels = 1; 5012 for (i = 0; i < active_queues; i++) 5013 scrqs->scrqs[i].vios_cookie = 5014 be64_to_cpu(setup->channel_handles[i]); 5015 5016 ibmvfc_dbg(vhost, "Using %u channels\n", 5017 vhost->scsi_scrqs.active_queues); 5018 } 5019 break; 5020 case IBMVFC_MAD_FAILED: 5021 level += ibmvfc_retry_host_init(vhost); 5022 ibmvfc_log(vhost, level, "Channel Setup failed\n"); 5023 fallthrough; 5024 case IBMVFC_MAD_DRIVER_FAILED: 5025 return; 5026 default: 5027 dev_err(vhost->dev, "Invalid Channel Setup response: 0x%x\n", 5028 mad_status); 5029 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5030 return; 5031 } 5032 5033 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 5034 wake_up(&vhost->work_wait_q); 5035 } 5036 5037 static void ibmvfc_channel_setup(struct ibmvfc_host *vhost) 5038 { 5039 struct ibmvfc_channel_setup_mad *mad; 5040 struct ibmvfc_channel_setup *setup_buf = vhost->channel_setup_buf; 5041 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); 5042 struct ibmvfc_scsi_channels *scrqs = &vhost->scsi_scrqs; 5043 unsigned int num_channels = 5044 min(vhost->client_scsi_channels, vhost->max_vios_scsi_channels); 5045 int level = IBMVFC_DEFAULT_LOG_LEVEL; 5046 int i; 5047 5048 if (!evt) { 5049 ibmvfc_log(vhost, level, "Channel Setup failed: no available events\n"); 5050 ibmvfc_hard_reset_host(vhost); 5051 return; 5052 } 5053 5054 memset(setup_buf, 0, sizeof(*setup_buf)); 5055 if (num_channels == 0) 5056 setup_buf->flags = cpu_to_be32(IBMVFC_CANCEL_CHANNELS); 5057 else { 5058 setup_buf->num_scsi_subq_channels = cpu_to_be32(num_channels); 5059 for (i = 0; i < num_channels; i++) 5060 setup_buf->channel_handles[i] = cpu_to_be64(scrqs->scrqs[i].cookie); 5061 } 5062 5063 ibmvfc_init_event(evt, ibmvfc_channel_setup_done, IBMVFC_MAD_FORMAT); 5064 mad = &evt->iu.channel_setup; 5065 memset(mad, 0, sizeof(*mad)); 5066 mad->common.version = cpu_to_be32(1); 5067 mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_SETUP); 5068 mad->common.length = cpu_to_be16(sizeof(*mad)); 5069 mad->buffer.va = cpu_to_be64(vhost->channel_setup_dma); 5070 mad->buffer.len = cpu_to_be32(sizeof(*vhost->channel_setup_buf)); 5071 5072 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 5073 5074 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5075 ibmvfc_dbg(vhost, "Sent channel setup\n"); 5076 else 5077 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 5078 } 5079 5080 static void ibmvfc_channel_enquiry_done(struct ibmvfc_event *evt) 5081 { 5082 struct ibmvfc_host *vhost = evt->vhost; 5083 struct ibmvfc_channel_enquiry *rsp = &evt->xfer_iu->channel_enquiry; 5084 u32 mad_status = be16_to_cpu(rsp->common.status); 5085 int level = IBMVFC_DEFAULT_LOG_LEVEL; 5086 5087 switch (mad_status) { 5088 case IBMVFC_MAD_SUCCESS: 5089 ibmvfc_dbg(vhost, "Channel Enquiry succeeded\n"); 5090 vhost->max_vios_scsi_channels = be32_to_cpu(rsp->num_scsi_subq_channels); 5091 ibmvfc_free_event(evt); 5092 break; 5093 case IBMVFC_MAD_FAILED: 5094 level += ibmvfc_retry_host_init(vhost); 5095 ibmvfc_log(vhost, level, "Channel Enquiry failed\n"); 5096 fallthrough; 5097 case IBMVFC_MAD_DRIVER_FAILED: 5098 ibmvfc_free_event(evt); 5099 return; 5100 default: 5101 dev_err(vhost->dev, "Invalid Channel Enquiry response: 0x%x\n", 5102 mad_status); 5103 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5104 ibmvfc_free_event(evt); 5105 return; 5106 } 5107 5108 ibmvfc_channel_setup(vhost); 5109 } 5110 5111 static void ibmvfc_channel_enquiry(struct ibmvfc_host *vhost) 5112 { 5113 struct ibmvfc_channel_enquiry *mad; 5114 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); 5115 int level = IBMVFC_DEFAULT_LOG_LEVEL; 5116 5117 if (!evt) { 5118 ibmvfc_log(vhost, level, "Channel Enquiry failed: no available events\n"); 5119 ibmvfc_hard_reset_host(vhost); 5120 return; 5121 } 5122 5123 ibmvfc_init_event(evt, ibmvfc_channel_enquiry_done, IBMVFC_MAD_FORMAT); 5124 mad = &evt->iu.channel_enquiry; 5125 memset(mad, 0, sizeof(*mad)); 5126 mad->common.version = cpu_to_be32(1); 5127 mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_ENQUIRY); 5128 mad->common.length = cpu_to_be16(sizeof(*mad)); 5129 5130 if (mig_channels_only) 5131 mad->flags |= cpu_to_be32(IBMVFC_NO_CHANNELS_TO_CRQ_SUPPORT); 5132 if (mig_no_less_channels) 5133 mad->flags |= cpu_to_be32(IBMVFC_NO_N_TO_M_CHANNELS_SUPPORT); 5134 5135 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 5136 5137 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5138 ibmvfc_dbg(vhost, "Send channel enquiry\n"); 5139 else 5140 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5141 } 5142 5143 /** 5144 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 5145 * @evt: ibmvfc event struct 5146 * 5147 **/ 5148 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 5149 { 5150 struct ibmvfc_host *vhost = evt->vhost; 5151 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); 5152 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 5153 unsigned int npiv_max_sectors; 5154 int level = IBMVFC_DEFAULT_LOG_LEVEL; 5155 5156 switch (mad_status) { 5157 case IBMVFC_MAD_SUCCESS: 5158 ibmvfc_free_event(evt); 5159 break; 5160 case IBMVFC_MAD_FAILED: 5161 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 5162 level += ibmvfc_retry_host_init(vhost); 5163 else 5164 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5165 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 5166 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 5167 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); 5168 ibmvfc_free_event(evt); 5169 return; 5170 case IBMVFC_MAD_CRQ_ERROR: 5171 ibmvfc_retry_host_init(vhost); 5172 fallthrough; 5173 case IBMVFC_MAD_DRIVER_FAILED: 5174 ibmvfc_free_event(evt); 5175 return; 5176 default: 5177 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 5178 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5179 ibmvfc_free_event(evt); 5180 return; 5181 } 5182 5183 vhost->client_migrated = 0; 5184 5185 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { 5186 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 5187 rsp->flags); 5188 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5189 wake_up(&vhost->work_wait_q); 5190 return; 5191 } 5192 5193 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { 5194 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 5195 rsp->max_cmds); 5196 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5197 wake_up(&vhost->work_wait_q); 5198 return; 5199 } 5200 5201 vhost->logged_in = 1; 5202 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); 5203 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 5204 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 5205 rsp->drc_name, npiv_max_sectors); 5206 5207 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); 5208 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); 5209 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); 5210 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); 5211 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 5212 fc_host_supported_classes(vhost->host) = 0; 5213 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) 5214 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 5215 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) 5216 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 5217 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) 5218 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 5219 fc_host_maxframe_size(vhost->host) = 5220 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; 5221 5222 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; 5223 vhost->host->max_sectors = npiv_max_sectors; 5224 5225 if (ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPORT_CHANNELS) && vhost->do_enquiry) { 5226 ibmvfc_channel_enquiry(vhost); 5227 } else { 5228 vhost->do_enquiry = 0; 5229 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 5230 wake_up(&vhost->work_wait_q); 5231 } 5232 } 5233 5234 /** 5235 * ibmvfc_npiv_login - Sends NPIV login 5236 * @vhost: ibmvfc host struct 5237 * 5238 **/ 5239 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 5240 { 5241 struct ibmvfc_npiv_login_mad *mad; 5242 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); 5243 5244 if (!evt) { 5245 ibmvfc_dbg(vhost, "NPIV Login failed: no available events\n"); 5246 ibmvfc_hard_reset_host(vhost); 5247 return; 5248 } 5249 5250 ibmvfc_gather_partition_info(vhost); 5251 ibmvfc_set_login_info(vhost); 5252 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 5253 5254 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 5255 mad = &evt->iu.npiv_login; 5256 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 5257 mad->common.version = cpu_to_be32(1); 5258 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); 5259 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); 5260 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); 5261 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); 5262 5263 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 5264 5265 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5266 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 5267 else 5268 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5269 } 5270 5271 /** 5272 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 5273 * @evt: ibmvfc event struct 5274 * 5275 **/ 5276 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 5277 { 5278 struct ibmvfc_host *vhost = evt->vhost; 5279 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); 5280 5281 ibmvfc_free_event(evt); 5282 5283 switch (mad_status) { 5284 case IBMVFC_MAD_SUCCESS: 5285 if (list_empty(&vhost->crq.sent) && 5286 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 5287 ibmvfc_init_host(vhost); 5288 return; 5289 } 5290 break; 5291 case IBMVFC_MAD_FAILED: 5292 case IBMVFC_MAD_NOT_SUPPORTED: 5293 case IBMVFC_MAD_CRQ_ERROR: 5294 case IBMVFC_MAD_DRIVER_FAILED: 5295 default: 5296 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 5297 break; 5298 } 5299 5300 ibmvfc_hard_reset_host(vhost); 5301 } 5302 5303 /** 5304 * ibmvfc_npiv_logout - Issue an NPIV Logout 5305 * @vhost: ibmvfc host struct 5306 * 5307 **/ 5308 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 5309 { 5310 struct ibmvfc_npiv_logout_mad *mad; 5311 struct ibmvfc_event *evt; 5312 5313 evt = ibmvfc_get_event(&vhost->crq); 5314 if (!evt) { 5315 ibmvfc_dbg(vhost, "NPIV Logout failed: no available events\n"); 5316 ibmvfc_hard_reset_host(vhost); 5317 return; 5318 } 5319 5320 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 5321 5322 mad = &evt->iu.npiv_logout; 5323 memset(mad, 0, sizeof(*mad)); 5324 mad->common.version = cpu_to_be32(1); 5325 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); 5326 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); 5327 5328 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 5329 5330 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5331 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 5332 else 5333 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5334 } 5335 5336 /** 5337 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 5338 * @vhost: ibmvfc host struct 5339 * 5340 * Returns: 5341 * 1 if work to do / 0 if not 5342 **/ 5343 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 5344 { 5345 struct ibmvfc_target *tgt; 5346 5347 list_for_each_entry(tgt, &vhost->targets, queue) { 5348 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 5349 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 5350 return 1; 5351 } 5352 5353 return 0; 5354 } 5355 5356 /** 5357 * ibmvfc_dev_logo_to_do - Is there target logout work to do? 5358 * @vhost: ibmvfc host struct 5359 * 5360 * Returns: 5361 * 1 if work to do / 0 if not 5362 **/ 5363 static int ibmvfc_dev_logo_to_do(struct ibmvfc_host *vhost) 5364 { 5365 struct ibmvfc_target *tgt; 5366 5367 list_for_each_entry(tgt, &vhost->targets, queue) { 5368 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT || 5369 tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) 5370 return 1; 5371 } 5372 return 0; 5373 } 5374 5375 /** 5376 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 5377 * @vhost: ibmvfc host struct 5378 * 5379 * Returns: 5380 * 1 if work to do / 0 if not 5381 **/ 5382 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 5383 { 5384 struct ibmvfc_target *tgt; 5385 5386 if (kthread_should_stop()) 5387 return 1; 5388 switch (vhost->action) { 5389 case IBMVFC_HOST_ACTION_NONE: 5390 case IBMVFC_HOST_ACTION_INIT_WAIT: 5391 case IBMVFC_HOST_ACTION_LOGO_WAIT: 5392 return 0; 5393 case IBMVFC_HOST_ACTION_TGT_INIT: 5394 case IBMVFC_HOST_ACTION_QUERY_TGTS: 5395 if (vhost->discovery_threads == disc_threads) 5396 return 0; 5397 list_for_each_entry(tgt, &vhost->targets, queue) 5398 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 5399 return 1; 5400 list_for_each_entry(tgt, &vhost->targets, queue) 5401 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 5402 return 0; 5403 return 1; 5404 case IBMVFC_HOST_ACTION_TGT_DEL: 5405 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 5406 if (vhost->discovery_threads == disc_threads) 5407 return 0; 5408 list_for_each_entry(tgt, &vhost->targets, queue) 5409 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) 5410 return 1; 5411 list_for_each_entry(tgt, &vhost->targets, queue) 5412 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) 5413 return 0; 5414 return 1; 5415 case IBMVFC_HOST_ACTION_LOGO: 5416 case IBMVFC_HOST_ACTION_INIT: 5417 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 5418 case IBMVFC_HOST_ACTION_QUERY: 5419 case IBMVFC_HOST_ACTION_RESET: 5420 case IBMVFC_HOST_ACTION_REENABLE: 5421 default: 5422 break; 5423 } 5424 5425 return 1; 5426 } 5427 5428 /** 5429 * ibmvfc_work_to_do - Is there task level work to do? 5430 * @vhost: ibmvfc host struct 5431 * 5432 * Returns: 5433 * 1 if work to do / 0 if not 5434 **/ 5435 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 5436 { 5437 unsigned long flags; 5438 int rc; 5439 5440 spin_lock_irqsave(vhost->host->host_lock, flags); 5441 rc = __ibmvfc_work_to_do(vhost); 5442 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5443 return rc; 5444 } 5445 5446 /** 5447 * ibmvfc_log_ae - Log async events if necessary 5448 * @vhost: ibmvfc host struct 5449 * @events: events to log 5450 * 5451 **/ 5452 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 5453 { 5454 if (events & IBMVFC_AE_RSCN) 5455 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 5456 if ((events & IBMVFC_AE_LINKDOWN) && 5457 vhost->state >= IBMVFC_HALTED) 5458 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 5459 if ((events & IBMVFC_AE_LINKUP) && 5460 vhost->state == IBMVFC_INITIALIZING) 5461 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 5462 } 5463 5464 /** 5465 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 5466 * @tgt: ibmvfc target struct 5467 * 5468 **/ 5469 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 5470 { 5471 struct ibmvfc_host *vhost = tgt->vhost; 5472 struct fc_rport *rport; 5473 unsigned long flags; 5474 5475 tgt_dbg(tgt, "Adding rport\n"); 5476 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 5477 spin_lock_irqsave(vhost->host->host_lock, flags); 5478 5479 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 5480 tgt_dbg(tgt, "Deleting rport\n"); 5481 list_del(&tgt->queue); 5482 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 5483 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5484 fc_remote_port_delete(rport); 5485 del_timer_sync(&tgt->timer); 5486 kref_put(&tgt->kref, ibmvfc_release_tgt); 5487 return; 5488 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 5489 tgt_dbg(tgt, "Deleting rport with outstanding I/O\n"); 5490 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); 5491 tgt->rport = NULL; 5492 tgt->init_retries = 0; 5493 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5494 fc_remote_port_delete(rport); 5495 return; 5496 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 5497 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5498 return; 5499 } 5500 5501 if (rport) { 5502 tgt_dbg(tgt, "rport add succeeded\n"); 5503 tgt->rport = rport; 5504 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; 5505 rport->supported_classes = 0; 5506 tgt->target_id = rport->scsi_target_id; 5507 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) 5508 rport->supported_classes |= FC_COS_CLASS1; 5509 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) 5510 rport->supported_classes |= FC_COS_CLASS2; 5511 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) 5512 rport->supported_classes |= FC_COS_CLASS3; 5513 if (rport->rqst_q) 5514 blk_queue_max_segments(rport->rqst_q, 1); 5515 } else 5516 tgt_dbg(tgt, "rport add failed\n"); 5517 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5518 } 5519 5520 /** 5521 * ibmvfc_do_work - Do task level work 5522 * @vhost: ibmvfc host struct 5523 * 5524 **/ 5525 static void ibmvfc_do_work(struct ibmvfc_host *vhost) 5526 { 5527 struct ibmvfc_target *tgt; 5528 unsigned long flags; 5529 struct fc_rport *rport; 5530 LIST_HEAD(purge); 5531 int rc; 5532 5533 ibmvfc_log_ae(vhost, vhost->events_to_log); 5534 spin_lock_irqsave(vhost->host->host_lock, flags); 5535 vhost->events_to_log = 0; 5536 switch (vhost->action) { 5537 case IBMVFC_HOST_ACTION_NONE: 5538 case IBMVFC_HOST_ACTION_LOGO_WAIT: 5539 case IBMVFC_HOST_ACTION_INIT_WAIT: 5540 break; 5541 case IBMVFC_HOST_ACTION_RESET: 5542 list_splice_init(&vhost->purge, &purge); 5543 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5544 ibmvfc_complete_purge(&purge); 5545 rc = ibmvfc_reset_crq(vhost); 5546 5547 spin_lock_irqsave(vhost->host->host_lock, flags); 5548 if (!rc || rc == H_CLOSED) 5549 vio_enable_interrupts(to_vio_dev(vhost->dev)); 5550 if (vhost->action == IBMVFC_HOST_ACTION_RESET) { 5551 /* 5552 * The only action we could have changed to would have 5553 * been reenable, in which case, we skip the rest of 5554 * this path and wait until we've done the re-enable 5555 * before sending the crq init. 5556 */ 5557 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 5558 5559 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 5560 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 5561 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5562 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 5563 } 5564 } 5565 break; 5566 case IBMVFC_HOST_ACTION_REENABLE: 5567 list_splice_init(&vhost->purge, &purge); 5568 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5569 ibmvfc_complete_purge(&purge); 5570 rc = ibmvfc_reenable_crq_queue(vhost); 5571 5572 spin_lock_irqsave(vhost->host->host_lock, flags); 5573 if (vhost->action == IBMVFC_HOST_ACTION_REENABLE) { 5574 /* 5575 * The only action we could have changed to would have 5576 * been reset, in which case, we skip the rest of this 5577 * path and wait until we've done the reset before 5578 * sending the crq init. 5579 */ 5580 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 5581 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 5582 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5583 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 5584 } 5585 } 5586 break; 5587 case IBMVFC_HOST_ACTION_LOGO: 5588 vhost->job_step(vhost); 5589 break; 5590 case IBMVFC_HOST_ACTION_INIT: 5591 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 5592 if (vhost->delay_init) { 5593 vhost->delay_init = 0; 5594 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5595 ssleep(15); 5596 return; 5597 } else 5598 vhost->job_step(vhost); 5599 break; 5600 case IBMVFC_HOST_ACTION_QUERY: 5601 list_for_each_entry(tgt, &vhost->targets, queue) 5602 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 5603 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 5604 break; 5605 case IBMVFC_HOST_ACTION_QUERY_TGTS: 5606 list_for_each_entry(tgt, &vhost->targets, queue) { 5607 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 5608 tgt->job_step(tgt); 5609 break; 5610 } 5611 } 5612 5613 if (!ibmvfc_dev_init_to_do(vhost)) 5614 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 5615 break; 5616 case IBMVFC_HOST_ACTION_TGT_DEL: 5617 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 5618 list_for_each_entry(tgt, &vhost->targets, queue) { 5619 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { 5620 tgt->job_step(tgt); 5621 break; 5622 } 5623 } 5624 5625 if (ibmvfc_dev_logo_to_do(vhost)) { 5626 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5627 return; 5628 } 5629 5630 list_for_each_entry(tgt, &vhost->targets, queue) { 5631 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 5632 tgt_dbg(tgt, "Deleting rport\n"); 5633 rport = tgt->rport; 5634 tgt->rport = NULL; 5635 list_del(&tgt->queue); 5636 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 5637 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5638 if (rport) 5639 fc_remote_port_delete(rport); 5640 del_timer_sync(&tgt->timer); 5641 kref_put(&tgt->kref, ibmvfc_release_tgt); 5642 return; 5643 } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 5644 tgt_dbg(tgt, "Deleting rport with I/O outstanding\n"); 5645 rport = tgt->rport; 5646 tgt->rport = NULL; 5647 tgt->init_retries = 0; 5648 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); 5649 5650 /* 5651 * If fast fail is enabled, we wait for it to fire and then clean up 5652 * the old port, since we expect the fast fail timer to clean up the 5653 * outstanding I/O faster than waiting for normal command timeouts. 5654 * However, if fast fail is disabled, any I/O outstanding to the 5655 * rport LUNs will stay outstanding indefinitely, since the EH handlers 5656 * won't get invoked for I/O's timing out. If this is a NPIV failover 5657 * scenario, the better alternative is to use the move login. 5658 */ 5659 if (rport && rport->fast_io_fail_tmo == -1) 5660 tgt->move_login = 1; 5661 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5662 if (rport) 5663 fc_remote_port_delete(rport); 5664 return; 5665 } 5666 } 5667 5668 if (vhost->state == IBMVFC_INITIALIZING) { 5669 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 5670 if (vhost->reinit) { 5671 vhost->reinit = 0; 5672 scsi_block_requests(vhost->host); 5673 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 5674 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5675 } else { 5676 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 5677 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 5678 wake_up(&vhost->init_wait_q); 5679 schedule_work(&vhost->rport_add_work_q); 5680 vhost->init_retries = 0; 5681 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5682 scsi_unblock_requests(vhost->host); 5683 } 5684 5685 return; 5686 } else { 5687 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 5688 vhost->job_step = ibmvfc_discover_targets; 5689 } 5690 } else { 5691 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 5692 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5693 scsi_unblock_requests(vhost->host); 5694 wake_up(&vhost->init_wait_q); 5695 return; 5696 } 5697 break; 5698 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 5699 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 5700 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5701 ibmvfc_alloc_targets(vhost); 5702 spin_lock_irqsave(vhost->host->host_lock, flags); 5703 break; 5704 case IBMVFC_HOST_ACTION_TGT_INIT: 5705 list_for_each_entry(tgt, &vhost->targets, queue) { 5706 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 5707 tgt->job_step(tgt); 5708 break; 5709 } 5710 } 5711 5712 if (!ibmvfc_dev_init_to_do(vhost)) 5713 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 5714 break; 5715 default: 5716 break; 5717 } 5718 5719 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5720 } 5721 5722 /** 5723 * ibmvfc_work - Do task level work 5724 * @data: ibmvfc host struct 5725 * 5726 * Returns: 5727 * zero 5728 **/ 5729 static int ibmvfc_work(void *data) 5730 { 5731 struct ibmvfc_host *vhost = data; 5732 int rc; 5733 5734 set_user_nice(current, MIN_NICE); 5735 5736 while (1) { 5737 rc = wait_event_interruptible(vhost->work_wait_q, 5738 ibmvfc_work_to_do(vhost)); 5739 5740 BUG_ON(rc); 5741 5742 if (kthread_should_stop()) 5743 break; 5744 5745 ibmvfc_do_work(vhost); 5746 } 5747 5748 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 5749 return 0; 5750 } 5751 5752 /** 5753 * ibmvfc_alloc_queue - Allocate queue 5754 * @vhost: ibmvfc host struct 5755 * @queue: ibmvfc queue to allocate 5756 * @fmt: queue format to allocate 5757 * 5758 * Returns: 5759 * 0 on success / non-zero on failure 5760 **/ 5761 static int ibmvfc_alloc_queue(struct ibmvfc_host *vhost, 5762 struct ibmvfc_queue *queue, 5763 enum ibmvfc_msg_fmt fmt) 5764 { 5765 struct device *dev = vhost->dev; 5766 size_t fmt_size; 5767 unsigned int pool_size = 0; 5768 5769 ENTER; 5770 spin_lock_init(&queue->_lock); 5771 queue->q_lock = &queue->_lock; 5772 5773 switch (fmt) { 5774 case IBMVFC_CRQ_FMT: 5775 fmt_size = sizeof(*queue->msgs.crq); 5776 pool_size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 5777 break; 5778 case IBMVFC_ASYNC_FMT: 5779 fmt_size = sizeof(*queue->msgs.async); 5780 break; 5781 case IBMVFC_SUB_CRQ_FMT: 5782 fmt_size = sizeof(*queue->msgs.scrq); 5783 /* We need one extra event for Cancel Commands */ 5784 pool_size = max_requests + 1; 5785 break; 5786 default: 5787 dev_warn(dev, "Unknown command/response queue message format: %d\n", fmt); 5788 return -EINVAL; 5789 } 5790 5791 if (ibmvfc_init_event_pool(vhost, queue, pool_size)) { 5792 dev_err(dev, "Couldn't initialize event pool.\n"); 5793 return -ENOMEM; 5794 } 5795 5796 queue->msgs.handle = (void *)get_zeroed_page(GFP_KERNEL); 5797 if (!queue->msgs.handle) 5798 return -ENOMEM; 5799 5800 queue->msg_token = dma_map_single(dev, queue->msgs.handle, PAGE_SIZE, 5801 DMA_BIDIRECTIONAL); 5802 5803 if (dma_mapping_error(dev, queue->msg_token)) { 5804 free_page((unsigned long)queue->msgs.handle); 5805 queue->msgs.handle = NULL; 5806 return -ENOMEM; 5807 } 5808 5809 queue->cur = 0; 5810 queue->fmt = fmt; 5811 queue->size = PAGE_SIZE / fmt_size; 5812 5813 queue->vhost = vhost; 5814 return 0; 5815 } 5816 5817 /** 5818 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 5819 * @vhost: ibmvfc host struct 5820 * 5821 * Allocates a page for messages, maps it for dma, and registers 5822 * the crq with the hypervisor. 5823 * 5824 * Return value: 5825 * zero on success / other on failure 5826 **/ 5827 static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 5828 { 5829 int rc, retrc = -ENOMEM; 5830 struct device *dev = vhost->dev; 5831 struct vio_dev *vdev = to_vio_dev(dev); 5832 struct ibmvfc_queue *crq = &vhost->crq; 5833 5834 ENTER; 5835 if (ibmvfc_alloc_queue(vhost, crq, IBMVFC_CRQ_FMT)) 5836 return -ENOMEM; 5837 5838 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5839 crq->msg_token, PAGE_SIZE); 5840 5841 if (rc == H_RESOURCE) 5842 /* maybe kexecing and resource is busy. try a reset */ 5843 retrc = rc = ibmvfc_reset_crq(vhost); 5844 5845 if (rc == H_CLOSED) 5846 dev_warn(dev, "Partner adapter not ready\n"); 5847 else if (rc) { 5848 dev_warn(dev, "Error %d opening adapter\n", rc); 5849 goto reg_crq_failed; 5850 } 5851 5852 retrc = 0; 5853 5854 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 5855 5856 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 5857 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 5858 goto req_irq_failed; 5859 } 5860 5861 if ((rc = vio_enable_interrupts(vdev))) { 5862 dev_err(dev, "Error %d enabling interrupts\n", rc); 5863 goto req_irq_failed; 5864 } 5865 5866 LEAVE; 5867 return retrc; 5868 5869 req_irq_failed: 5870 tasklet_kill(&vhost->tasklet); 5871 do { 5872 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5873 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5874 reg_crq_failed: 5875 ibmvfc_free_queue(vhost, crq); 5876 return retrc; 5877 } 5878 5879 static int ibmvfc_register_scsi_channel(struct ibmvfc_host *vhost, 5880 int index) 5881 { 5882 struct device *dev = vhost->dev; 5883 struct vio_dev *vdev = to_vio_dev(dev); 5884 struct ibmvfc_queue *scrq = &vhost->scsi_scrqs.scrqs[index]; 5885 int rc = -ENOMEM; 5886 5887 ENTER; 5888 5889 rc = h_reg_sub_crq(vdev->unit_address, scrq->msg_token, PAGE_SIZE, 5890 &scrq->cookie, &scrq->hw_irq); 5891 5892 /* H_CLOSED indicates successful register, but no CRQ partner */ 5893 if (rc && rc != H_CLOSED) { 5894 dev_warn(dev, "Error registering sub-crq: %d\n", rc); 5895 if (rc == H_PARAMETER) 5896 dev_warn_once(dev, "Firmware may not support MQ\n"); 5897 goto reg_failed; 5898 } 5899 5900 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 5901 5902 if (!scrq->irq) { 5903 rc = -EINVAL; 5904 dev_err(dev, "Error mapping sub-crq[%d] irq\n", index); 5905 goto irq_failed; 5906 } 5907 5908 snprintf(scrq->name, sizeof(scrq->name), "ibmvfc-%x-scsi%d", 5909 vdev->unit_address, index); 5910 rc = request_irq(scrq->irq, ibmvfc_interrupt_scsi, 0, scrq->name, scrq); 5911 5912 if (rc) { 5913 dev_err(dev, "Couldn't register sub-crq[%d] irq\n", index); 5914 irq_dispose_mapping(scrq->irq); 5915 goto irq_failed; 5916 } 5917 5918 scrq->hwq_id = index; 5919 5920 LEAVE; 5921 return 0; 5922 5923 irq_failed: 5924 do { 5925 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, scrq->cookie); 5926 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5927 reg_failed: 5928 LEAVE; 5929 return rc; 5930 } 5931 5932 static void ibmvfc_deregister_scsi_channel(struct ibmvfc_host *vhost, int index) 5933 { 5934 struct device *dev = vhost->dev; 5935 struct vio_dev *vdev = to_vio_dev(dev); 5936 struct ibmvfc_queue *scrq = &vhost->scsi_scrqs.scrqs[index]; 5937 long rc; 5938 5939 ENTER; 5940 5941 free_irq(scrq->irq, scrq); 5942 irq_dispose_mapping(scrq->irq); 5943 scrq->irq = 0; 5944 5945 do { 5946 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, 5947 scrq->cookie); 5948 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5949 5950 if (rc) 5951 dev_err(dev, "Failed to free sub-crq[%d]: rc=%ld\n", index, rc); 5952 5953 /* Clean out the queue */ 5954 memset(scrq->msgs.crq, 0, PAGE_SIZE); 5955 scrq->cur = 0; 5956 5957 LEAVE; 5958 } 5959 5960 static void ibmvfc_reg_sub_crqs(struct ibmvfc_host *vhost) 5961 { 5962 int i, j; 5963 5964 ENTER; 5965 if (!vhost->mq_enabled || !vhost->scsi_scrqs.scrqs) 5966 return; 5967 5968 for (i = 0; i < nr_scsi_hw_queues; i++) { 5969 if (ibmvfc_register_scsi_channel(vhost, i)) { 5970 for (j = i; j > 0; j--) 5971 ibmvfc_deregister_scsi_channel(vhost, j - 1); 5972 vhost->do_enquiry = 0; 5973 return; 5974 } 5975 } 5976 5977 LEAVE; 5978 } 5979 5980 static void ibmvfc_dereg_sub_crqs(struct ibmvfc_host *vhost) 5981 { 5982 int i; 5983 5984 ENTER; 5985 if (!vhost->mq_enabled || !vhost->scsi_scrqs.scrqs) 5986 return; 5987 5988 for (i = 0; i < nr_scsi_hw_queues; i++) 5989 ibmvfc_deregister_scsi_channel(vhost, i); 5990 5991 LEAVE; 5992 } 5993 5994 static void ibmvfc_init_sub_crqs(struct ibmvfc_host *vhost) 5995 { 5996 struct ibmvfc_queue *scrq; 5997 int i, j; 5998 5999 ENTER; 6000 if (!vhost->mq_enabled) 6001 return; 6002 6003 vhost->scsi_scrqs.scrqs = kcalloc(nr_scsi_hw_queues, 6004 sizeof(*vhost->scsi_scrqs.scrqs), 6005 GFP_KERNEL); 6006 if (!vhost->scsi_scrqs.scrqs) { 6007 vhost->do_enquiry = 0; 6008 return; 6009 } 6010 6011 for (i = 0; i < nr_scsi_hw_queues; i++) { 6012 scrq = &vhost->scsi_scrqs.scrqs[i]; 6013 if (ibmvfc_alloc_queue(vhost, scrq, IBMVFC_SUB_CRQ_FMT)) { 6014 for (j = i; j > 0; j--) { 6015 scrq = &vhost->scsi_scrqs.scrqs[j - 1]; 6016 ibmvfc_free_queue(vhost, scrq); 6017 } 6018 kfree(vhost->scsi_scrqs.scrqs); 6019 vhost->scsi_scrqs.scrqs = NULL; 6020 vhost->scsi_scrqs.active_queues = 0; 6021 vhost->do_enquiry = 0; 6022 vhost->mq_enabled = 0; 6023 return; 6024 } 6025 } 6026 6027 ibmvfc_reg_sub_crqs(vhost); 6028 6029 LEAVE; 6030 } 6031 6032 static void ibmvfc_release_sub_crqs(struct ibmvfc_host *vhost) 6033 { 6034 struct ibmvfc_queue *scrq; 6035 int i; 6036 6037 ENTER; 6038 if (!vhost->scsi_scrqs.scrqs) 6039 return; 6040 6041 ibmvfc_dereg_sub_crqs(vhost); 6042 6043 for (i = 0; i < nr_scsi_hw_queues; i++) { 6044 scrq = &vhost->scsi_scrqs.scrqs[i]; 6045 ibmvfc_free_queue(vhost, scrq); 6046 } 6047 6048 kfree(vhost->scsi_scrqs.scrqs); 6049 vhost->scsi_scrqs.scrqs = NULL; 6050 vhost->scsi_scrqs.active_queues = 0; 6051 LEAVE; 6052 } 6053 6054 /** 6055 * ibmvfc_free_mem - Free memory for vhost 6056 * @vhost: ibmvfc host struct 6057 * 6058 * Return value: 6059 * none 6060 **/ 6061 static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 6062 { 6063 struct ibmvfc_queue *async_q = &vhost->async_crq; 6064 6065 ENTER; 6066 mempool_destroy(vhost->tgt_pool); 6067 kfree(vhost->trace); 6068 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 6069 vhost->disc_buf_dma); 6070 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 6071 vhost->login_buf, vhost->login_buf_dma); 6072 dma_free_coherent(vhost->dev, sizeof(*vhost->channel_setup_buf), 6073 vhost->channel_setup_buf, vhost->channel_setup_dma); 6074 dma_pool_destroy(vhost->sg_pool); 6075 ibmvfc_free_queue(vhost, async_q); 6076 LEAVE; 6077 } 6078 6079 /** 6080 * ibmvfc_alloc_mem - Allocate memory for vhost 6081 * @vhost: ibmvfc host struct 6082 * 6083 * Return value: 6084 * 0 on success / non-zero on failure 6085 **/ 6086 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 6087 { 6088 struct ibmvfc_queue *async_q = &vhost->async_crq; 6089 struct device *dev = vhost->dev; 6090 6091 ENTER; 6092 if (ibmvfc_alloc_queue(vhost, async_q, IBMVFC_ASYNC_FMT)) { 6093 dev_err(dev, "Couldn't allocate/map async queue.\n"); 6094 goto nomem; 6095 } 6096 6097 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 6098 SG_ALL * sizeof(struct srp_direct_buf), 6099 sizeof(struct srp_direct_buf), 0); 6100 6101 if (!vhost->sg_pool) { 6102 dev_err(dev, "Failed to allocate sg pool\n"); 6103 goto unmap_async_crq; 6104 } 6105 6106 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 6107 &vhost->login_buf_dma, GFP_KERNEL); 6108 6109 if (!vhost->login_buf) { 6110 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 6111 goto free_sg_pool; 6112 } 6113 6114 vhost->disc_buf_sz = sizeof(*vhost->disc_buf) * max_targets; 6115 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 6116 &vhost->disc_buf_dma, GFP_KERNEL); 6117 6118 if (!vhost->disc_buf) { 6119 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 6120 goto free_login_buffer; 6121 } 6122 6123 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 6124 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 6125 atomic_set(&vhost->trace_index, -1); 6126 6127 if (!vhost->trace) 6128 goto free_disc_buffer; 6129 6130 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 6131 sizeof(struct ibmvfc_target)); 6132 6133 if (!vhost->tgt_pool) { 6134 dev_err(dev, "Couldn't allocate target memory pool\n"); 6135 goto free_trace; 6136 } 6137 6138 vhost->channel_setup_buf = dma_alloc_coherent(dev, sizeof(*vhost->channel_setup_buf), 6139 &vhost->channel_setup_dma, 6140 GFP_KERNEL); 6141 6142 if (!vhost->channel_setup_buf) { 6143 dev_err(dev, "Couldn't allocate Channel Setup buffer\n"); 6144 goto free_tgt_pool; 6145 } 6146 6147 LEAVE; 6148 return 0; 6149 6150 free_tgt_pool: 6151 mempool_destroy(vhost->tgt_pool); 6152 free_trace: 6153 kfree(vhost->trace); 6154 free_disc_buffer: 6155 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 6156 vhost->disc_buf_dma); 6157 free_login_buffer: 6158 dma_free_coherent(dev, sizeof(*vhost->login_buf), 6159 vhost->login_buf, vhost->login_buf_dma); 6160 free_sg_pool: 6161 dma_pool_destroy(vhost->sg_pool); 6162 unmap_async_crq: 6163 ibmvfc_free_queue(vhost, async_q); 6164 nomem: 6165 LEAVE; 6166 return -ENOMEM; 6167 } 6168 6169 /** 6170 * ibmvfc_rport_add_thread - Worker thread for rport adds 6171 * @work: work struct 6172 * 6173 **/ 6174 static void ibmvfc_rport_add_thread(struct work_struct *work) 6175 { 6176 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 6177 rport_add_work_q); 6178 struct ibmvfc_target *tgt; 6179 struct fc_rport *rport; 6180 unsigned long flags; 6181 int did_work; 6182 6183 ENTER; 6184 spin_lock_irqsave(vhost->host->host_lock, flags); 6185 do { 6186 did_work = 0; 6187 if (vhost->state != IBMVFC_ACTIVE) 6188 break; 6189 6190 list_for_each_entry(tgt, &vhost->targets, queue) { 6191 if (tgt->add_rport) { 6192 did_work = 1; 6193 tgt->add_rport = 0; 6194 kref_get(&tgt->kref); 6195 rport = tgt->rport; 6196 if (!rport) { 6197 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6198 ibmvfc_tgt_add_rport(tgt); 6199 } else if (get_device(&rport->dev)) { 6200 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6201 tgt_dbg(tgt, "Setting rport roles\n"); 6202 fc_remote_port_rolechg(rport, tgt->ids.roles); 6203 put_device(&rport->dev); 6204 } else { 6205 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6206 } 6207 6208 kref_put(&tgt->kref, ibmvfc_release_tgt); 6209 spin_lock_irqsave(vhost->host->host_lock, flags); 6210 break; 6211 } 6212 } 6213 } while(did_work); 6214 6215 if (vhost->state == IBMVFC_ACTIVE) 6216 vhost->scan_complete = 1; 6217 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6218 LEAVE; 6219 } 6220 6221 /** 6222 * ibmvfc_probe - Adapter hot plug add entry point 6223 * @vdev: vio device struct 6224 * @id: vio device id struct 6225 * 6226 * Return value: 6227 * 0 on success / non-zero on failure 6228 **/ 6229 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 6230 { 6231 struct ibmvfc_host *vhost; 6232 struct Scsi_Host *shost; 6233 struct device *dev = &vdev->dev; 6234 int rc = -ENOMEM; 6235 unsigned int max_scsi_queues = IBMVFC_MAX_SCSI_QUEUES; 6236 6237 ENTER; 6238 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 6239 if (!shost) { 6240 dev_err(dev, "Couldn't allocate host data\n"); 6241 goto out; 6242 } 6243 6244 shost->transportt = ibmvfc_transport_template; 6245 shost->can_queue = max_requests; 6246 shost->max_lun = max_lun; 6247 shost->max_id = max_targets; 6248 shost->max_sectors = IBMVFC_MAX_SECTORS; 6249 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 6250 shost->unique_id = shost->host_no; 6251 shost->nr_hw_queues = mq_enabled ? min(max_scsi_queues, nr_scsi_hw_queues) : 1; 6252 6253 vhost = shost_priv(shost); 6254 INIT_LIST_HEAD(&vhost->targets); 6255 INIT_LIST_HEAD(&vhost->purge); 6256 sprintf(vhost->name, IBMVFC_NAME); 6257 vhost->host = shost; 6258 vhost->dev = dev; 6259 vhost->partition_number = -1; 6260 vhost->log_level = log_level; 6261 vhost->task_set = 1; 6262 6263 vhost->mq_enabled = mq_enabled; 6264 vhost->client_scsi_channels = min(shost->nr_hw_queues, nr_scsi_channels); 6265 vhost->using_channels = 0; 6266 vhost->do_enquiry = 1; 6267 vhost->scan_timeout = 0; 6268 6269 strcpy(vhost->partition_name, "UNKNOWN"); 6270 init_waitqueue_head(&vhost->work_wait_q); 6271 init_waitqueue_head(&vhost->init_wait_q); 6272 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 6273 mutex_init(&vhost->passthru_mutex); 6274 6275 if ((rc = ibmvfc_alloc_mem(vhost))) 6276 goto free_scsi_host; 6277 6278 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 6279 shost->host_no); 6280 6281 if (IS_ERR(vhost->work_thread)) { 6282 dev_err(dev, "Couldn't create kernel thread: %ld\n", 6283 PTR_ERR(vhost->work_thread)); 6284 rc = PTR_ERR(vhost->work_thread); 6285 goto free_host_mem; 6286 } 6287 6288 if ((rc = ibmvfc_init_crq(vhost))) { 6289 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 6290 goto kill_kthread; 6291 } 6292 6293 if ((rc = scsi_add_host(shost, dev))) 6294 goto release_crq; 6295 6296 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 6297 6298 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 6299 &ibmvfc_trace_attr))) { 6300 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 6301 goto remove_shost; 6302 } 6303 6304 ibmvfc_init_sub_crqs(vhost); 6305 6306 if (shost_to_fc_host(shost)->rqst_q) 6307 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 6308 dev_set_drvdata(dev, vhost); 6309 spin_lock(&ibmvfc_driver_lock); 6310 list_add_tail(&vhost->queue, &ibmvfc_head); 6311 spin_unlock(&ibmvfc_driver_lock); 6312 6313 ibmvfc_send_crq_init(vhost); 6314 scsi_scan_host(shost); 6315 return 0; 6316 6317 remove_shost: 6318 scsi_remove_host(shost); 6319 release_crq: 6320 ibmvfc_release_crq_queue(vhost); 6321 kill_kthread: 6322 kthread_stop(vhost->work_thread); 6323 free_host_mem: 6324 ibmvfc_free_mem(vhost); 6325 free_scsi_host: 6326 scsi_host_put(shost); 6327 out: 6328 LEAVE; 6329 return rc; 6330 } 6331 6332 /** 6333 * ibmvfc_remove - Adapter hot plug remove entry point 6334 * @vdev: vio device struct 6335 * 6336 * Return value: 6337 * 0 6338 **/ 6339 static void ibmvfc_remove(struct vio_dev *vdev) 6340 { 6341 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 6342 LIST_HEAD(purge); 6343 unsigned long flags; 6344 6345 ENTER; 6346 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 6347 6348 spin_lock_irqsave(vhost->host->host_lock, flags); 6349 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 6350 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6351 6352 ibmvfc_wait_while_resetting(vhost); 6353 kthread_stop(vhost->work_thread); 6354 fc_remove_host(vhost->host); 6355 scsi_remove_host(vhost->host); 6356 6357 spin_lock_irqsave(vhost->host->host_lock, flags); 6358 ibmvfc_purge_requests(vhost, DID_ERROR); 6359 list_splice_init(&vhost->purge, &purge); 6360 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6361 ibmvfc_complete_purge(&purge); 6362 ibmvfc_release_sub_crqs(vhost); 6363 ibmvfc_release_crq_queue(vhost); 6364 6365 ibmvfc_free_mem(vhost); 6366 spin_lock(&ibmvfc_driver_lock); 6367 list_del(&vhost->queue); 6368 spin_unlock(&ibmvfc_driver_lock); 6369 scsi_host_put(vhost->host); 6370 LEAVE; 6371 } 6372 6373 /** 6374 * ibmvfc_resume - Resume from suspend 6375 * @dev: device struct 6376 * 6377 * We may have lost an interrupt across suspend/resume, so kick the 6378 * interrupt handler 6379 * 6380 */ 6381 static int ibmvfc_resume(struct device *dev) 6382 { 6383 unsigned long flags; 6384 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 6385 struct vio_dev *vdev = to_vio_dev(dev); 6386 6387 spin_lock_irqsave(vhost->host->host_lock, flags); 6388 vio_disable_interrupts(vdev); 6389 tasklet_schedule(&vhost->tasklet); 6390 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6391 return 0; 6392 } 6393 6394 /** 6395 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 6396 * @vdev: vio device struct 6397 * 6398 * Return value: 6399 * Number of bytes the driver will need to DMA map at the same time in 6400 * order to perform well. 6401 */ 6402 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 6403 { 6404 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 6405 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 6406 } 6407 6408 static const struct vio_device_id ibmvfc_device_table[] = { 6409 {"fcp", "IBM,vfc-client"}, 6410 { "", "" } 6411 }; 6412 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 6413 6414 static const struct dev_pm_ops ibmvfc_pm_ops = { 6415 .resume = ibmvfc_resume 6416 }; 6417 6418 static struct vio_driver ibmvfc_driver = { 6419 .id_table = ibmvfc_device_table, 6420 .probe = ibmvfc_probe, 6421 .remove = ibmvfc_remove, 6422 .get_desired_dma = ibmvfc_get_desired_dma, 6423 .name = IBMVFC_NAME, 6424 .pm = &ibmvfc_pm_ops, 6425 }; 6426 6427 static struct fc_function_template ibmvfc_transport_functions = { 6428 .show_host_fabric_name = 1, 6429 .show_host_node_name = 1, 6430 .show_host_port_name = 1, 6431 .show_host_supported_classes = 1, 6432 .show_host_port_type = 1, 6433 .show_host_port_id = 1, 6434 .show_host_maxframe_size = 1, 6435 6436 .get_host_port_state = ibmvfc_get_host_port_state, 6437 .show_host_port_state = 1, 6438 6439 .get_host_speed = ibmvfc_get_host_speed, 6440 .show_host_speed = 1, 6441 6442 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 6443 .terminate_rport_io = ibmvfc_terminate_rport_io, 6444 6445 .show_rport_maxframe_size = 1, 6446 .show_rport_supported_classes = 1, 6447 6448 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 6449 .show_rport_dev_loss_tmo = 1, 6450 6451 .get_starget_node_name = ibmvfc_get_starget_node_name, 6452 .show_starget_node_name = 1, 6453 6454 .get_starget_port_name = ibmvfc_get_starget_port_name, 6455 .show_starget_port_name = 1, 6456 6457 .get_starget_port_id = ibmvfc_get_starget_port_id, 6458 .show_starget_port_id = 1, 6459 6460 .bsg_request = ibmvfc_bsg_request, 6461 .bsg_timeout = ibmvfc_bsg_timeout, 6462 }; 6463 6464 /** 6465 * ibmvfc_module_init - Initialize the ibmvfc module 6466 * 6467 * Return value: 6468 * 0 on success / other on failure 6469 **/ 6470 static int __init ibmvfc_module_init(void) 6471 { 6472 int rc; 6473 6474 if (!firmware_has_feature(FW_FEATURE_VIO)) 6475 return -ENODEV; 6476 6477 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 6478 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 6479 6480 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 6481 if (!ibmvfc_transport_template) 6482 return -ENOMEM; 6483 6484 rc = vio_register_driver(&ibmvfc_driver); 6485 if (rc) 6486 fc_release_transport(ibmvfc_transport_template); 6487 return rc; 6488 } 6489 6490 /** 6491 * ibmvfc_module_exit - Teardown the ibmvfc module 6492 * 6493 * Return value: 6494 * nothing 6495 **/ 6496 static void __exit ibmvfc_module_exit(void) 6497 { 6498 vio_unregister_driver(&ibmvfc_driver); 6499 fc_release_transport(ibmvfc_transport_template); 6500 } 6501 6502 module_init(ibmvfc_module_init); 6503 module_exit(ibmvfc_module_exit); 6504