1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 4 * 5 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 6 * 7 * Copyright (C) IBM Corporation, 2008 8 */ 9 10 #include <linux/module.h> 11 #include <linux/moduleparam.h> 12 #include <linux/dma-mapping.h> 13 #include <linux/dmapool.h> 14 #include <linux/delay.h> 15 #include <linux/interrupt.h> 16 #include <linux/irqdomain.h> 17 #include <linux/kthread.h> 18 #include <linux/slab.h> 19 #include <linux/of.h> 20 #include <linux/pm.h> 21 #include <linux/stringify.h> 22 #include <linux/bsg-lib.h> 23 #include <asm/firmware.h> 24 #include <asm/irq.h> 25 #include <asm/rtas.h> 26 #include <asm/vio.h> 27 #include <scsi/scsi.h> 28 #include <scsi/scsi_cmnd.h> 29 #include <scsi/scsi_host.h> 30 #include <scsi/scsi_device.h> 31 #include <scsi/scsi_tcq.h> 32 #include <scsi/scsi_transport_fc.h> 33 #include <scsi/scsi_bsg_fc.h> 34 #include "ibmvfc.h" 35 36 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 37 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 38 static u64 max_lun = IBMVFC_MAX_LUN; 39 static unsigned int max_targets = IBMVFC_MAX_TARGETS; 40 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 41 static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 42 static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 43 static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 44 static unsigned int cls3_error = IBMVFC_CLS3_ERROR; 45 static unsigned int mq_enabled = IBMVFC_MQ; 46 static unsigned int nr_scsi_hw_queues = IBMVFC_SCSI_HW_QUEUES; 47 static unsigned int nr_scsi_channels = IBMVFC_SCSI_CHANNELS; 48 static unsigned int mig_channels_only = IBMVFC_MIG_NO_SUB_TO_CRQ; 49 static unsigned int mig_no_less_channels = IBMVFC_MIG_NO_N_TO_M; 50 51 static LIST_HEAD(ibmvfc_head); 52 static DEFINE_SPINLOCK(ibmvfc_driver_lock); 53 static struct scsi_transport_template *ibmvfc_transport_template; 54 55 MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 56 MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 57 MODULE_LICENSE("GPL"); 58 MODULE_VERSION(IBMVFC_DRIVER_VERSION); 59 60 module_param_named(mq, mq_enabled, uint, S_IRUGO); 61 MODULE_PARM_DESC(mq, "Enable multiqueue support. " 62 "[Default=" __stringify(IBMVFC_MQ) "]"); 63 module_param_named(scsi_host_queues, nr_scsi_hw_queues, uint, S_IRUGO); 64 MODULE_PARM_DESC(scsi_host_queues, "Number of SCSI Host submission queues. " 65 "[Default=" __stringify(IBMVFC_SCSI_HW_QUEUES) "]"); 66 module_param_named(scsi_hw_channels, nr_scsi_channels, uint, S_IRUGO); 67 MODULE_PARM_DESC(scsi_hw_channels, "Number of hw scsi channels to request. " 68 "[Default=" __stringify(IBMVFC_SCSI_CHANNELS) "]"); 69 module_param_named(mig_channels_only, mig_channels_only, uint, S_IRUGO); 70 MODULE_PARM_DESC(mig_channels_only, "Prevent migration to non-channelized system. " 71 "[Default=" __stringify(IBMVFC_MIG_NO_SUB_TO_CRQ) "]"); 72 module_param_named(mig_no_less_channels, mig_no_less_channels, uint, S_IRUGO); 73 MODULE_PARM_DESC(mig_no_less_channels, "Prevent migration to system with less channels. " 74 "[Default=" __stringify(IBMVFC_MIG_NO_N_TO_M) "]"); 75 76 module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 77 MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 78 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 79 module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 80 MODULE_PARM_DESC(default_timeout, 81 "Default timeout in seconds for initialization and EH commands. " 82 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 83 module_param_named(max_requests, max_requests, uint, S_IRUGO); 84 MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 85 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 86 module_param_named(max_lun, max_lun, ullong, S_IRUGO); 87 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 88 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 89 module_param_named(max_targets, max_targets, uint, S_IRUGO); 90 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 91 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 92 module_param_named(disc_threads, disc_threads, uint, S_IRUGO); 93 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 94 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 95 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 96 MODULE_PARM_DESC(debug, "Enable driver debug information. " 97 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 98 module_param_named(log_level, log_level, uint, 0); 99 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 100 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 101 module_param_named(cls3_error, cls3_error, uint, 0); 102 MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. " 103 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]"); 104 105 static const struct { 106 u16 status; 107 u16 error; 108 u8 result; 109 u8 retry; 110 int log; 111 char *name; 112 } cmd_status [] = { 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 115 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 116 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 117 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 118 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 119 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 120 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 121 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 122 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 123 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 124 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 125 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 126 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 127 128 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 129 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 130 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 131 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 132 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 133 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 134 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 135 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 136 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 137 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 138 139 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 140 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 141 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 142 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 143 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 144 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 145 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 146 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 147 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 148 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 149 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 150 151 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 152 { IBMVFC_FC_SCSI_ERROR, IBMVFC_COMMAND_FAILED, DID_ERROR, 0, 1, "PRLI to device failed." }, 153 }; 154 155 static void ibmvfc_npiv_login(struct ibmvfc_host *); 156 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 157 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 158 static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 159 static void ibmvfc_npiv_logout(struct ibmvfc_host *); 160 static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *); 161 static void ibmvfc_tgt_move_login(struct ibmvfc_target *); 162 163 static void ibmvfc_release_sub_crqs(struct ibmvfc_host *); 164 static void ibmvfc_init_sub_crqs(struct ibmvfc_host *); 165 166 static const char *unknown_error = "unknown error"; 167 168 static long h_reg_sub_crq(unsigned long unit_address, unsigned long ioba, 169 unsigned long length, unsigned long *cookie, 170 unsigned long *irq) 171 { 172 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 173 long rc; 174 175 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, ioba, length); 176 *cookie = retbuf[0]; 177 *irq = retbuf[1]; 178 179 return rc; 180 } 181 182 static int ibmvfc_check_caps(struct ibmvfc_host *vhost, unsigned long cap_flags) 183 { 184 u64 host_caps = be64_to_cpu(vhost->login_buf->resp.capabilities); 185 186 return (host_caps & cap_flags) ? 1 : 0; 187 } 188 189 static struct ibmvfc_fcp_cmd_iu *ibmvfc_get_fcp_iu(struct ibmvfc_host *vhost, 190 struct ibmvfc_cmd *vfc_cmd) 191 { 192 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 193 return &vfc_cmd->v2.iu; 194 else 195 return &vfc_cmd->v1.iu; 196 } 197 198 static struct ibmvfc_fcp_rsp *ibmvfc_get_fcp_rsp(struct ibmvfc_host *vhost, 199 struct ibmvfc_cmd *vfc_cmd) 200 { 201 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 202 return &vfc_cmd->v2.rsp; 203 else 204 return &vfc_cmd->v1.rsp; 205 } 206 207 #ifdef CONFIG_SCSI_IBMVFC_TRACE 208 /** 209 * ibmvfc_trc_start - Log a start trace entry 210 * @evt: ibmvfc event struct 211 * 212 **/ 213 static void ibmvfc_trc_start(struct ibmvfc_event *evt) 214 { 215 struct ibmvfc_host *vhost = evt->vhost; 216 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 217 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 218 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 219 struct ibmvfc_trace_entry *entry; 220 int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK; 221 222 entry = &vhost->trace[index]; 223 entry->evt = evt; 224 entry->time = jiffies; 225 entry->fmt = evt->crq.format; 226 entry->type = IBMVFC_TRC_START; 227 228 switch (entry->fmt) { 229 case IBMVFC_CMD_FORMAT: 230 entry->op_code = iu->cdb[0]; 231 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 232 entry->lun = scsilun_to_int(&iu->lun); 233 entry->tmf_flags = iu->tmf_flags; 234 entry->u.start.xfer_len = be32_to_cpu(iu->xfer_len); 235 break; 236 case IBMVFC_MAD_FORMAT: 237 entry->op_code = be32_to_cpu(mad->opcode); 238 break; 239 default: 240 break; 241 } 242 } 243 244 /** 245 * ibmvfc_trc_end - Log an end trace entry 246 * @evt: ibmvfc event struct 247 * 248 **/ 249 static void ibmvfc_trc_end(struct ibmvfc_event *evt) 250 { 251 struct ibmvfc_host *vhost = evt->vhost; 252 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 253 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 254 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 255 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 256 struct ibmvfc_trace_entry *entry; 257 int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK; 258 259 entry = &vhost->trace[index]; 260 entry->evt = evt; 261 entry->time = jiffies; 262 entry->fmt = evt->crq.format; 263 entry->type = IBMVFC_TRC_END; 264 265 switch (entry->fmt) { 266 case IBMVFC_CMD_FORMAT: 267 entry->op_code = iu->cdb[0]; 268 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 269 entry->lun = scsilun_to_int(&iu->lun); 270 entry->tmf_flags = iu->tmf_flags; 271 entry->u.end.status = be16_to_cpu(vfc_cmd->status); 272 entry->u.end.error = be16_to_cpu(vfc_cmd->error); 273 entry->u.end.fcp_rsp_flags = rsp->flags; 274 entry->u.end.rsp_code = rsp->data.info.rsp_code; 275 entry->u.end.scsi_status = rsp->scsi_status; 276 break; 277 case IBMVFC_MAD_FORMAT: 278 entry->op_code = be32_to_cpu(mad->opcode); 279 entry->u.end.status = be16_to_cpu(mad->status); 280 break; 281 default: 282 break; 283 284 } 285 } 286 287 #else 288 #define ibmvfc_trc_start(evt) do { } while (0) 289 #define ibmvfc_trc_end(evt) do { } while (0) 290 #endif 291 292 /** 293 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 294 * @status: status / error class 295 * @error: error 296 * 297 * Return value: 298 * index into cmd_status / -EINVAL on failure 299 **/ 300 static int ibmvfc_get_err_index(u16 status, u16 error) 301 { 302 int i; 303 304 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 305 if ((cmd_status[i].status & status) == cmd_status[i].status && 306 cmd_status[i].error == error) 307 return i; 308 309 return -EINVAL; 310 } 311 312 /** 313 * ibmvfc_get_cmd_error - Find the error description for the fcp response 314 * @status: status / error class 315 * @error: error 316 * 317 * Return value: 318 * error description string 319 **/ 320 static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 321 { 322 int rc = ibmvfc_get_err_index(status, error); 323 if (rc >= 0) 324 return cmd_status[rc].name; 325 return unknown_error; 326 } 327 328 /** 329 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 330 * @vhost: ibmvfc host struct 331 * @vfc_cmd: ibmvfc command struct 332 * 333 * Return value: 334 * SCSI result value to return for completed command 335 **/ 336 static int ibmvfc_get_err_result(struct ibmvfc_host *vhost, struct ibmvfc_cmd *vfc_cmd) 337 { 338 int err; 339 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 340 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 341 342 if ((rsp->flags & FCP_RSP_LEN_VALID) && 343 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 344 rsp->data.info.rsp_code)) 345 return DID_ERROR << 16; 346 347 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 348 if (err >= 0) 349 return rsp->scsi_status | (cmd_status[err].result << 16); 350 return rsp->scsi_status | (DID_ERROR << 16); 351 } 352 353 /** 354 * ibmvfc_retry_cmd - Determine if error status is retryable 355 * @status: status / error class 356 * @error: error 357 * 358 * Return value: 359 * 1 if error should be retried / 0 if it should not 360 **/ 361 static int ibmvfc_retry_cmd(u16 status, u16 error) 362 { 363 int rc = ibmvfc_get_err_index(status, error); 364 365 if (rc >= 0) 366 return cmd_status[rc].retry; 367 return 1; 368 } 369 370 static const char *unknown_fc_explain = "unknown fc explain"; 371 372 static const struct { 373 u16 fc_explain; 374 char *name; 375 } ls_explain [] = { 376 { 0x00, "no additional explanation" }, 377 { 0x01, "service parameter error - options" }, 378 { 0x03, "service parameter error - initiator control" }, 379 { 0x05, "service parameter error - recipient control" }, 380 { 0x07, "service parameter error - received data field size" }, 381 { 0x09, "service parameter error - concurrent seq" }, 382 { 0x0B, "service parameter error - credit" }, 383 { 0x0D, "invalid N_Port/F_Port_Name" }, 384 { 0x0E, "invalid node/Fabric Name" }, 385 { 0x0F, "invalid common service parameters" }, 386 { 0x11, "invalid association header" }, 387 { 0x13, "association header required" }, 388 { 0x15, "invalid originator S_ID" }, 389 { 0x17, "invalid OX_ID-RX-ID combination" }, 390 { 0x19, "command (request) already in progress" }, 391 { 0x1E, "N_Port Login requested" }, 392 { 0x1F, "Invalid N_Port_ID" }, 393 }; 394 395 static const struct { 396 u16 fc_explain; 397 char *name; 398 } gs_explain [] = { 399 { 0x00, "no additional explanation" }, 400 { 0x01, "port identifier not registered" }, 401 { 0x02, "port name not registered" }, 402 { 0x03, "node name not registered" }, 403 { 0x04, "class of service not registered" }, 404 { 0x06, "initial process associator not registered" }, 405 { 0x07, "FC-4 TYPEs not registered" }, 406 { 0x08, "symbolic port name not registered" }, 407 { 0x09, "symbolic node name not registered" }, 408 { 0x0A, "port type not registered" }, 409 { 0xF0, "authorization exception" }, 410 { 0xF1, "authentication exception" }, 411 { 0xF2, "data base full" }, 412 { 0xF3, "data base empty" }, 413 { 0xF4, "processing request" }, 414 { 0xF5, "unable to verify connection" }, 415 { 0xF6, "devices not in a common zone" }, 416 }; 417 418 /** 419 * ibmvfc_get_ls_explain - Return the FC Explain description text 420 * @status: FC Explain status 421 * 422 * Returns: 423 * error string 424 **/ 425 static const char *ibmvfc_get_ls_explain(u16 status) 426 { 427 int i; 428 429 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 430 if (ls_explain[i].fc_explain == status) 431 return ls_explain[i].name; 432 433 return unknown_fc_explain; 434 } 435 436 /** 437 * ibmvfc_get_gs_explain - Return the FC Explain description text 438 * @status: FC Explain status 439 * 440 * Returns: 441 * error string 442 **/ 443 static const char *ibmvfc_get_gs_explain(u16 status) 444 { 445 int i; 446 447 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 448 if (gs_explain[i].fc_explain == status) 449 return gs_explain[i].name; 450 451 return unknown_fc_explain; 452 } 453 454 static const struct { 455 enum ibmvfc_fc_type fc_type; 456 char *name; 457 } fc_type [] = { 458 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 459 { IBMVFC_PORT_REJECT, "port reject" }, 460 { IBMVFC_LS_REJECT, "ELS reject" }, 461 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 462 { IBMVFC_PORT_BUSY, "port busy" }, 463 { IBMVFC_BASIC_REJECT, "basic reject" }, 464 }; 465 466 static const char *unknown_fc_type = "unknown fc type"; 467 468 /** 469 * ibmvfc_get_fc_type - Return the FC Type description text 470 * @status: FC Type error status 471 * 472 * Returns: 473 * error string 474 **/ 475 static const char *ibmvfc_get_fc_type(u16 status) 476 { 477 int i; 478 479 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 480 if (fc_type[i].fc_type == status) 481 return fc_type[i].name; 482 483 return unknown_fc_type; 484 } 485 486 /** 487 * ibmvfc_set_tgt_action - Set the next init action for the target 488 * @tgt: ibmvfc target struct 489 * @action: action to perform 490 * 491 * Returns: 492 * 0 if action changed / non-zero if not changed 493 **/ 494 static int ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 495 enum ibmvfc_target_action action) 496 { 497 int rc = -EINVAL; 498 499 switch (tgt->action) { 500 case IBMVFC_TGT_ACTION_LOGOUT_RPORT: 501 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT || 502 action == IBMVFC_TGT_ACTION_DEL_RPORT) { 503 tgt->action = action; 504 rc = 0; 505 } 506 break; 507 case IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT: 508 if (action == IBMVFC_TGT_ACTION_DEL_RPORT || 509 action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 510 tgt->action = action; 511 rc = 0; 512 } 513 break; 514 case IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT: 515 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { 516 tgt->action = action; 517 rc = 0; 518 } 519 break; 520 case IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT: 521 if (action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 522 tgt->action = action; 523 rc = 0; 524 } 525 break; 526 case IBMVFC_TGT_ACTION_DEL_RPORT: 527 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 528 tgt->action = action; 529 rc = 0; 530 } 531 break; 532 case IBMVFC_TGT_ACTION_DELETED_RPORT: 533 break; 534 default: 535 tgt->action = action; 536 rc = 0; 537 break; 538 } 539 540 if (action >= IBMVFC_TGT_ACTION_LOGOUT_RPORT) 541 tgt->add_rport = 0; 542 543 return rc; 544 } 545 546 /** 547 * ibmvfc_set_host_state - Set the state for the host 548 * @vhost: ibmvfc host struct 549 * @state: state to set host to 550 * 551 * Returns: 552 * 0 if state changed / non-zero if not changed 553 **/ 554 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 555 enum ibmvfc_host_state state) 556 { 557 int rc = 0; 558 559 switch (vhost->state) { 560 case IBMVFC_HOST_OFFLINE: 561 rc = -EINVAL; 562 break; 563 default: 564 vhost->state = state; 565 break; 566 } 567 568 return rc; 569 } 570 571 /** 572 * ibmvfc_set_host_action - Set the next init action for the host 573 * @vhost: ibmvfc host struct 574 * @action: action to perform 575 * 576 **/ 577 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 578 enum ibmvfc_host_action action) 579 { 580 switch (action) { 581 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 582 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 583 vhost->action = action; 584 break; 585 case IBMVFC_HOST_ACTION_LOGO_WAIT: 586 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 587 vhost->action = action; 588 break; 589 case IBMVFC_HOST_ACTION_INIT_WAIT: 590 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 591 vhost->action = action; 592 break; 593 case IBMVFC_HOST_ACTION_QUERY: 594 switch (vhost->action) { 595 case IBMVFC_HOST_ACTION_INIT_WAIT: 596 case IBMVFC_HOST_ACTION_NONE: 597 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 598 vhost->action = action; 599 break; 600 default: 601 break; 602 } 603 break; 604 case IBMVFC_HOST_ACTION_TGT_INIT: 605 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 606 vhost->action = action; 607 break; 608 case IBMVFC_HOST_ACTION_REENABLE: 609 case IBMVFC_HOST_ACTION_RESET: 610 vhost->action = action; 611 break; 612 case IBMVFC_HOST_ACTION_INIT: 613 case IBMVFC_HOST_ACTION_TGT_DEL: 614 case IBMVFC_HOST_ACTION_LOGO: 615 case IBMVFC_HOST_ACTION_QUERY_TGTS: 616 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 617 case IBMVFC_HOST_ACTION_NONE: 618 default: 619 switch (vhost->action) { 620 case IBMVFC_HOST_ACTION_RESET: 621 case IBMVFC_HOST_ACTION_REENABLE: 622 break; 623 default: 624 vhost->action = action; 625 break; 626 } 627 break; 628 } 629 } 630 631 /** 632 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 633 * @vhost: ibmvfc host struct 634 * 635 * Return value: 636 * nothing 637 **/ 638 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 639 { 640 if (vhost->action == IBMVFC_HOST_ACTION_NONE && 641 vhost->state == IBMVFC_ACTIVE) { 642 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 643 scsi_block_requests(vhost->host); 644 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 645 } 646 } else 647 vhost->reinit = 1; 648 649 wake_up(&vhost->work_wait_q); 650 } 651 652 /** 653 * ibmvfc_del_tgt - Schedule cleanup and removal of the target 654 * @tgt: ibmvfc target struct 655 **/ 656 static void ibmvfc_del_tgt(struct ibmvfc_target *tgt) 657 { 658 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT)) { 659 tgt->job_step = ibmvfc_tgt_implicit_logout_and_del; 660 tgt->init_retries = 0; 661 } 662 wake_up(&tgt->vhost->work_wait_q); 663 } 664 665 /** 666 * ibmvfc_link_down - Handle a link down event from the adapter 667 * @vhost: ibmvfc host struct 668 * @state: ibmvfc host state to enter 669 * 670 **/ 671 static void ibmvfc_link_down(struct ibmvfc_host *vhost, 672 enum ibmvfc_host_state state) 673 { 674 struct ibmvfc_target *tgt; 675 676 ENTER; 677 scsi_block_requests(vhost->host); 678 list_for_each_entry(tgt, &vhost->targets, queue) 679 ibmvfc_del_tgt(tgt); 680 ibmvfc_set_host_state(vhost, state); 681 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 682 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 683 wake_up(&vhost->work_wait_q); 684 LEAVE; 685 } 686 687 /** 688 * ibmvfc_init_host - Start host initialization 689 * @vhost: ibmvfc host struct 690 * 691 * Return value: 692 * nothing 693 **/ 694 static void ibmvfc_init_host(struct ibmvfc_host *vhost) 695 { 696 struct ibmvfc_target *tgt; 697 698 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 699 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 700 dev_err(vhost->dev, 701 "Host initialization retries exceeded. Taking adapter offline\n"); 702 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 703 return; 704 } 705 } 706 707 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 708 memset(vhost->async_crq.msgs.async, 0, PAGE_SIZE); 709 vhost->async_crq.cur = 0; 710 711 list_for_each_entry(tgt, &vhost->targets, queue) 712 ibmvfc_del_tgt(tgt); 713 scsi_block_requests(vhost->host); 714 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 715 vhost->job_step = ibmvfc_npiv_login; 716 wake_up(&vhost->work_wait_q); 717 } 718 } 719 720 /** 721 * ibmvfc_send_crq - Send a CRQ 722 * @vhost: ibmvfc host struct 723 * @word1: the first 64 bits of the data 724 * @word2: the second 64 bits of the data 725 * 726 * Return value: 727 * 0 on success / other on failure 728 **/ 729 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 730 { 731 struct vio_dev *vdev = to_vio_dev(vhost->dev); 732 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 733 } 734 735 static int ibmvfc_send_sub_crq(struct ibmvfc_host *vhost, u64 cookie, u64 word1, 736 u64 word2, u64 word3, u64 word4) 737 { 738 struct vio_dev *vdev = to_vio_dev(vhost->dev); 739 740 return plpar_hcall_norets(H_SEND_SUB_CRQ, vdev->unit_address, cookie, 741 word1, word2, word3, word4); 742 } 743 744 /** 745 * ibmvfc_send_crq_init - Send a CRQ init message 746 * @vhost: ibmvfc host struct 747 * 748 * Return value: 749 * 0 on success / other on failure 750 **/ 751 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 752 { 753 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 754 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 755 } 756 757 /** 758 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 759 * @vhost: ibmvfc host struct 760 * 761 * Return value: 762 * 0 on success / other on failure 763 **/ 764 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 765 { 766 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 767 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 768 } 769 770 /** 771 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 772 * @vhost: ibmvfc host who owns the event pool 773 * @queue: ibmvfc queue struct 774 * @size: pool size 775 * 776 * Returns zero on success. 777 **/ 778 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost, 779 struct ibmvfc_queue *queue, 780 unsigned int size) 781 { 782 int i; 783 struct ibmvfc_event_pool *pool = &queue->evt_pool; 784 785 ENTER; 786 if (!size) 787 return 0; 788 789 pool->size = size; 790 pool->events = kcalloc(size, sizeof(*pool->events), GFP_KERNEL); 791 if (!pool->events) 792 return -ENOMEM; 793 794 pool->iu_storage = dma_alloc_coherent(vhost->dev, 795 size * sizeof(*pool->iu_storage), 796 &pool->iu_token, 0); 797 798 if (!pool->iu_storage) { 799 kfree(pool->events); 800 return -ENOMEM; 801 } 802 803 INIT_LIST_HEAD(&queue->sent); 804 INIT_LIST_HEAD(&queue->free); 805 spin_lock_init(&queue->l_lock); 806 807 for (i = 0; i < size; ++i) { 808 struct ibmvfc_event *evt = &pool->events[i]; 809 810 /* 811 * evt->active states 812 * 1 = in flight 813 * 0 = being completed 814 * -1 = free/freed 815 */ 816 atomic_set(&evt->active, -1); 817 atomic_set(&evt->free, 1); 818 evt->crq.valid = 0x80; 819 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i)); 820 evt->xfer_iu = pool->iu_storage + i; 821 evt->vhost = vhost; 822 evt->queue = queue; 823 evt->ext_list = NULL; 824 list_add_tail(&evt->queue_list, &queue->free); 825 } 826 827 LEAVE; 828 return 0; 829 } 830 831 /** 832 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 833 * @vhost: ibmvfc host who owns the event pool 834 * @queue: ibmvfc queue struct 835 * 836 **/ 837 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost, 838 struct ibmvfc_queue *queue) 839 { 840 int i; 841 struct ibmvfc_event_pool *pool = &queue->evt_pool; 842 843 ENTER; 844 for (i = 0; i < pool->size; ++i) { 845 list_del(&pool->events[i].queue_list); 846 BUG_ON(atomic_read(&pool->events[i].free) != 1); 847 if (pool->events[i].ext_list) 848 dma_pool_free(vhost->sg_pool, 849 pool->events[i].ext_list, 850 pool->events[i].ext_list_token); 851 } 852 853 kfree(pool->events); 854 dma_free_coherent(vhost->dev, 855 pool->size * sizeof(*pool->iu_storage), 856 pool->iu_storage, pool->iu_token); 857 LEAVE; 858 } 859 860 /** 861 * ibmvfc_free_queue - Deallocate queue 862 * @vhost: ibmvfc host struct 863 * @queue: ibmvfc queue struct 864 * 865 * Unmaps dma and deallocates page for messages 866 **/ 867 static void ibmvfc_free_queue(struct ibmvfc_host *vhost, 868 struct ibmvfc_queue *queue) 869 { 870 struct device *dev = vhost->dev; 871 872 dma_unmap_single(dev, queue->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 873 free_page((unsigned long)queue->msgs.handle); 874 queue->msgs.handle = NULL; 875 876 ibmvfc_free_event_pool(vhost, queue); 877 } 878 879 /** 880 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 881 * @vhost: ibmvfc host struct 882 * 883 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 884 * the crq with the hypervisor. 885 **/ 886 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 887 { 888 long rc = 0; 889 struct vio_dev *vdev = to_vio_dev(vhost->dev); 890 struct ibmvfc_queue *crq = &vhost->crq; 891 892 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 893 free_irq(vdev->irq, vhost); 894 tasklet_kill(&vhost->tasklet); 895 do { 896 if (rc) 897 msleep(100); 898 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 899 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 900 901 vhost->state = IBMVFC_NO_CRQ; 902 vhost->logged_in = 0; 903 904 ibmvfc_free_queue(vhost, crq); 905 } 906 907 /** 908 * ibmvfc_reenable_crq_queue - reenables the CRQ 909 * @vhost: ibmvfc host struct 910 * 911 * Return value: 912 * 0 on success / other on failure 913 **/ 914 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 915 { 916 int rc = 0; 917 struct vio_dev *vdev = to_vio_dev(vhost->dev); 918 unsigned long flags; 919 920 ibmvfc_release_sub_crqs(vhost); 921 922 /* Re-enable the CRQ */ 923 do { 924 if (rc) 925 msleep(100); 926 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 927 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 928 929 if (rc) 930 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 931 932 spin_lock_irqsave(vhost->host->host_lock, flags); 933 spin_lock(vhost->crq.q_lock); 934 vhost->do_enquiry = 1; 935 vhost->using_channels = 0; 936 spin_unlock(vhost->crq.q_lock); 937 spin_unlock_irqrestore(vhost->host->host_lock, flags); 938 939 ibmvfc_init_sub_crqs(vhost); 940 941 return rc; 942 } 943 944 /** 945 * ibmvfc_reset_crq - resets a crq after a failure 946 * @vhost: ibmvfc host struct 947 * 948 * Return value: 949 * 0 on success / other on failure 950 **/ 951 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 952 { 953 int rc = 0; 954 unsigned long flags; 955 struct vio_dev *vdev = to_vio_dev(vhost->dev); 956 struct ibmvfc_queue *crq = &vhost->crq; 957 958 ibmvfc_release_sub_crqs(vhost); 959 960 /* Close the CRQ */ 961 do { 962 if (rc) 963 msleep(100); 964 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 965 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 966 967 spin_lock_irqsave(vhost->host->host_lock, flags); 968 spin_lock(vhost->crq.q_lock); 969 vhost->state = IBMVFC_NO_CRQ; 970 vhost->logged_in = 0; 971 vhost->do_enquiry = 1; 972 vhost->using_channels = 0; 973 974 /* Clean out the queue */ 975 memset(crq->msgs.crq, 0, PAGE_SIZE); 976 crq->cur = 0; 977 978 /* And re-open it again */ 979 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 980 crq->msg_token, PAGE_SIZE); 981 982 if (rc == H_CLOSED) 983 /* Adapter is good, but other end is not ready */ 984 dev_warn(vhost->dev, "Partner adapter not ready\n"); 985 else if (rc != 0) 986 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 987 988 spin_unlock(vhost->crq.q_lock); 989 spin_unlock_irqrestore(vhost->host->host_lock, flags); 990 991 ibmvfc_init_sub_crqs(vhost); 992 993 return rc; 994 } 995 996 /** 997 * ibmvfc_valid_event - Determines if event is valid. 998 * @pool: event_pool that contains the event 999 * @evt: ibmvfc event to be checked for validity 1000 * 1001 * Return value: 1002 * 1 if event is valid / 0 if event is not valid 1003 **/ 1004 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 1005 struct ibmvfc_event *evt) 1006 { 1007 int index = evt - pool->events; 1008 if (index < 0 || index >= pool->size) /* outside of bounds */ 1009 return 0; 1010 if (evt != pool->events + index) /* unaligned */ 1011 return 0; 1012 return 1; 1013 } 1014 1015 /** 1016 * ibmvfc_free_event - Free the specified event 1017 * @evt: ibmvfc_event to be freed 1018 * 1019 **/ 1020 static void ibmvfc_free_event(struct ibmvfc_event *evt) 1021 { 1022 struct ibmvfc_event_pool *pool = &evt->queue->evt_pool; 1023 unsigned long flags; 1024 1025 BUG_ON(!ibmvfc_valid_event(pool, evt)); 1026 BUG_ON(atomic_inc_return(&evt->free) != 1); 1027 BUG_ON(atomic_dec_and_test(&evt->active)); 1028 1029 spin_lock_irqsave(&evt->queue->l_lock, flags); 1030 list_add_tail(&evt->queue_list, &evt->queue->free); 1031 if (evt->eh_comp) 1032 complete(evt->eh_comp); 1033 spin_unlock_irqrestore(&evt->queue->l_lock, flags); 1034 } 1035 1036 /** 1037 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 1038 * @evt: ibmvfc event struct 1039 * 1040 * This function does not setup any error status, that must be done 1041 * before this function gets called. 1042 **/ 1043 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 1044 { 1045 struct scsi_cmnd *cmnd = evt->cmnd; 1046 1047 if (cmnd) { 1048 scsi_dma_unmap(cmnd); 1049 cmnd->scsi_done(cmnd); 1050 } 1051 1052 ibmvfc_free_event(evt); 1053 } 1054 1055 /** 1056 * ibmvfc_complete_purge - Complete failed command list 1057 * @purge_list: list head of failed commands 1058 * 1059 * This function runs completions on commands to fail as a result of a 1060 * host reset or platform migration. 1061 **/ 1062 static void ibmvfc_complete_purge(struct list_head *purge_list) 1063 { 1064 struct ibmvfc_event *evt, *pos; 1065 1066 list_for_each_entry_safe(evt, pos, purge_list, queue_list) { 1067 list_del(&evt->queue_list); 1068 ibmvfc_trc_end(evt); 1069 evt->done(evt); 1070 } 1071 } 1072 1073 /** 1074 * ibmvfc_fail_request - Fail request with specified error code 1075 * @evt: ibmvfc event struct 1076 * @error_code: error code to fail request with 1077 * 1078 * Return value: 1079 * none 1080 **/ 1081 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 1082 { 1083 /* 1084 * Anything we are failing should still be active. Otherwise, it 1085 * implies we already got a response for the command and are doing 1086 * something bad like double completing it. 1087 */ 1088 BUG_ON(!atomic_dec_and_test(&evt->active)); 1089 if (evt->cmnd) { 1090 evt->cmnd->result = (error_code << 16); 1091 evt->done = ibmvfc_scsi_eh_done; 1092 } else 1093 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED); 1094 1095 del_timer(&evt->timer); 1096 } 1097 1098 /** 1099 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 1100 * @vhost: ibmvfc host struct 1101 * @error_code: error code to fail requests with 1102 * 1103 * Return value: 1104 * none 1105 **/ 1106 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 1107 { 1108 struct ibmvfc_event *evt, *pos; 1109 struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; 1110 unsigned long flags; 1111 int hwqs = 0; 1112 int i; 1113 1114 if (vhost->using_channels) 1115 hwqs = vhost->scsi_scrqs.active_queues; 1116 1117 ibmvfc_dbg(vhost, "Purging all requests\n"); 1118 spin_lock_irqsave(&vhost->crq.l_lock, flags); 1119 list_for_each_entry_safe(evt, pos, &vhost->crq.sent, queue_list) 1120 ibmvfc_fail_request(evt, error_code); 1121 list_splice_init(&vhost->crq.sent, &vhost->purge); 1122 spin_unlock_irqrestore(&vhost->crq.l_lock, flags); 1123 1124 for (i = 0; i < hwqs; i++) { 1125 spin_lock_irqsave(queues[i].q_lock, flags); 1126 spin_lock(&queues[i].l_lock); 1127 list_for_each_entry_safe(evt, pos, &queues[i].sent, queue_list) 1128 ibmvfc_fail_request(evt, error_code); 1129 list_splice_init(&queues[i].sent, &vhost->purge); 1130 spin_unlock(&queues[i].l_lock); 1131 spin_unlock_irqrestore(queues[i].q_lock, flags); 1132 } 1133 } 1134 1135 /** 1136 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 1137 * @vhost: struct ibmvfc host to reset 1138 **/ 1139 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 1140 { 1141 ibmvfc_purge_requests(vhost, DID_ERROR); 1142 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 1143 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 1144 } 1145 1146 /** 1147 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 1148 * @vhost: struct ibmvfc host to reset 1149 **/ 1150 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 1151 { 1152 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 1153 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 1154 scsi_block_requests(vhost->host); 1155 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 1156 vhost->job_step = ibmvfc_npiv_logout; 1157 wake_up(&vhost->work_wait_q); 1158 } else 1159 ibmvfc_hard_reset_host(vhost); 1160 } 1161 1162 /** 1163 * ibmvfc_reset_host - Reset the connection to the server 1164 * @vhost: ibmvfc host struct 1165 **/ 1166 static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 1167 { 1168 unsigned long flags; 1169 1170 spin_lock_irqsave(vhost->host->host_lock, flags); 1171 __ibmvfc_reset_host(vhost); 1172 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1173 } 1174 1175 /** 1176 * ibmvfc_retry_host_init - Retry host initialization if allowed 1177 * @vhost: ibmvfc host struct 1178 * 1179 * Returns: 1 if init will be retried / 0 if not 1180 * 1181 **/ 1182 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 1183 { 1184 int retry = 0; 1185 1186 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 1187 vhost->delay_init = 1; 1188 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 1189 dev_err(vhost->dev, 1190 "Host initialization retries exceeded. Taking adapter offline\n"); 1191 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 1192 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 1193 __ibmvfc_reset_host(vhost); 1194 else { 1195 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 1196 retry = 1; 1197 } 1198 } 1199 1200 wake_up(&vhost->work_wait_q); 1201 return retry; 1202 } 1203 1204 /** 1205 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 1206 * @starget: scsi target struct 1207 * 1208 * Return value: 1209 * ibmvfc_target struct / NULL if not found 1210 **/ 1211 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 1212 { 1213 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 1214 struct ibmvfc_host *vhost = shost_priv(shost); 1215 struct ibmvfc_target *tgt; 1216 1217 list_for_each_entry(tgt, &vhost->targets, queue) 1218 if (tgt->target_id == starget->id) { 1219 kref_get(&tgt->kref); 1220 return tgt; 1221 } 1222 return NULL; 1223 } 1224 1225 /** 1226 * ibmvfc_get_target - Find the specified scsi_target 1227 * @starget: scsi target struct 1228 * 1229 * Return value: 1230 * ibmvfc_target struct / NULL if not found 1231 **/ 1232 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 1233 { 1234 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 1235 struct ibmvfc_target *tgt; 1236 unsigned long flags; 1237 1238 spin_lock_irqsave(shost->host_lock, flags); 1239 tgt = __ibmvfc_get_target(starget); 1240 spin_unlock_irqrestore(shost->host_lock, flags); 1241 return tgt; 1242 } 1243 1244 /** 1245 * ibmvfc_get_host_speed - Get host port speed 1246 * @shost: scsi host struct 1247 * 1248 * Return value: 1249 * none 1250 **/ 1251 static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 1252 { 1253 struct ibmvfc_host *vhost = shost_priv(shost); 1254 unsigned long flags; 1255 1256 spin_lock_irqsave(shost->host_lock, flags); 1257 if (vhost->state == IBMVFC_ACTIVE) { 1258 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) { 1259 case 1: 1260 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 1261 break; 1262 case 2: 1263 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 1264 break; 1265 case 4: 1266 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 1267 break; 1268 case 8: 1269 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 1270 break; 1271 case 10: 1272 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 1273 break; 1274 case 16: 1275 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 1276 break; 1277 default: 1278 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 1279 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100); 1280 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 1281 break; 1282 } 1283 } else 1284 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 1285 spin_unlock_irqrestore(shost->host_lock, flags); 1286 } 1287 1288 /** 1289 * ibmvfc_get_host_port_state - Get host port state 1290 * @shost: scsi host struct 1291 * 1292 * Return value: 1293 * none 1294 **/ 1295 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 1296 { 1297 struct ibmvfc_host *vhost = shost_priv(shost); 1298 unsigned long flags; 1299 1300 spin_lock_irqsave(shost->host_lock, flags); 1301 switch (vhost->state) { 1302 case IBMVFC_INITIALIZING: 1303 case IBMVFC_ACTIVE: 1304 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 1305 break; 1306 case IBMVFC_LINK_DOWN: 1307 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 1308 break; 1309 case IBMVFC_LINK_DEAD: 1310 case IBMVFC_HOST_OFFLINE: 1311 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1312 break; 1313 case IBMVFC_HALTED: 1314 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1315 break; 1316 case IBMVFC_NO_CRQ: 1317 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1318 break; 1319 default: 1320 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1321 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1322 break; 1323 } 1324 spin_unlock_irqrestore(shost->host_lock, flags); 1325 } 1326 1327 /** 1328 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1329 * @rport: rport struct 1330 * @timeout: timeout value 1331 * 1332 * Return value: 1333 * none 1334 **/ 1335 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1336 { 1337 if (timeout) 1338 rport->dev_loss_tmo = timeout; 1339 else 1340 rport->dev_loss_tmo = 1; 1341 } 1342 1343 /** 1344 * ibmvfc_release_tgt - Free memory allocated for a target 1345 * @kref: kref struct 1346 * 1347 **/ 1348 static void ibmvfc_release_tgt(struct kref *kref) 1349 { 1350 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1351 kfree(tgt); 1352 } 1353 1354 /** 1355 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1356 * @starget: scsi target struct 1357 * 1358 * Return value: 1359 * none 1360 **/ 1361 static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1362 { 1363 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1364 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1365 if (tgt) 1366 kref_put(&tgt->kref, ibmvfc_release_tgt); 1367 } 1368 1369 /** 1370 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1371 * @starget: scsi target struct 1372 * 1373 * Return value: 1374 * none 1375 **/ 1376 static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1377 { 1378 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1379 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1380 if (tgt) 1381 kref_put(&tgt->kref, ibmvfc_release_tgt); 1382 } 1383 1384 /** 1385 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1386 * @starget: scsi target struct 1387 * 1388 * Return value: 1389 * none 1390 **/ 1391 static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1392 { 1393 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1394 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1395 if (tgt) 1396 kref_put(&tgt->kref, ibmvfc_release_tgt); 1397 } 1398 1399 /** 1400 * ibmvfc_wait_while_resetting - Wait while the host resets 1401 * @vhost: ibmvfc host struct 1402 * 1403 * Return value: 1404 * 0 on success / other on failure 1405 **/ 1406 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1407 { 1408 long timeout = wait_event_timeout(vhost->init_wait_q, 1409 ((vhost->state == IBMVFC_ACTIVE || 1410 vhost->state == IBMVFC_HOST_OFFLINE || 1411 vhost->state == IBMVFC_LINK_DEAD) && 1412 vhost->action == IBMVFC_HOST_ACTION_NONE), 1413 (init_timeout * HZ)); 1414 1415 return timeout ? 0 : -EIO; 1416 } 1417 1418 /** 1419 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1420 * @shost: scsi host struct 1421 * 1422 * Return value: 1423 * 0 on success / other on failure 1424 **/ 1425 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1426 { 1427 struct ibmvfc_host *vhost = shost_priv(shost); 1428 1429 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1430 ibmvfc_reset_host(vhost); 1431 return ibmvfc_wait_while_resetting(vhost); 1432 } 1433 1434 /** 1435 * ibmvfc_gather_partition_info - Gather info about the LPAR 1436 * @vhost: ibmvfc host struct 1437 * 1438 * Return value: 1439 * none 1440 **/ 1441 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1442 { 1443 struct device_node *rootdn; 1444 const char *name; 1445 const unsigned int *num; 1446 1447 rootdn = of_find_node_by_path("/"); 1448 if (!rootdn) 1449 return; 1450 1451 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1452 if (name) 1453 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1454 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1455 if (num) 1456 vhost->partition_number = *num; 1457 of_node_put(rootdn); 1458 } 1459 1460 /** 1461 * ibmvfc_set_login_info - Setup info for NPIV login 1462 * @vhost: ibmvfc host struct 1463 * 1464 * Return value: 1465 * none 1466 **/ 1467 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1468 { 1469 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1470 struct ibmvfc_queue *async_crq = &vhost->async_crq; 1471 struct device_node *of_node = vhost->dev->of_node; 1472 const char *location; 1473 1474 memset(login_info, 0, sizeof(*login_info)); 1475 1476 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX); 1477 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); 1478 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); 1479 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); 1480 login_info->partition_num = cpu_to_be32(vhost->partition_number); 1481 login_info->vfc_frame_version = cpu_to_be32(1); 1482 login_info->fcp_version = cpu_to_be16(3); 1483 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); 1484 if (vhost->client_migrated) 1485 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); 1486 1487 login_info->max_cmds = cpu_to_be32(max_requests + IBMVFC_NUM_INTERNAL_REQ); 1488 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE | IBMVFC_CAN_SEND_VF_WWPN); 1489 1490 if (vhost->mq_enabled || vhost->using_channels) 1491 login_info->capabilities |= cpu_to_be64(IBMVFC_CAN_USE_CHANNELS); 1492 1493 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); 1494 login_info->async.len = cpu_to_be32(async_crq->size * 1495 sizeof(*async_crq->msgs.async)); 1496 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1497 strncpy(login_info->device_name, 1498 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1499 1500 location = of_get_property(of_node, "ibm,loc-code", NULL); 1501 location = location ? location : dev_name(vhost->dev); 1502 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1503 } 1504 1505 /** 1506 * ibmvfc_get_event - Gets the next free event in pool 1507 * @queue: ibmvfc queue struct 1508 * 1509 * Returns a free event from the pool. 1510 **/ 1511 static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_queue *queue) 1512 { 1513 struct ibmvfc_event *evt; 1514 unsigned long flags; 1515 1516 spin_lock_irqsave(&queue->l_lock, flags); 1517 BUG_ON(list_empty(&queue->free)); 1518 evt = list_entry(queue->free.next, struct ibmvfc_event, queue_list); 1519 atomic_set(&evt->free, 0); 1520 list_del(&evt->queue_list); 1521 spin_unlock_irqrestore(&queue->l_lock, flags); 1522 return evt; 1523 } 1524 1525 /** 1526 * ibmvfc_locked_done - Calls evt completion with host_lock held 1527 * @evt: ibmvfc evt to complete 1528 * 1529 * All non-scsi command completion callbacks have the expectation that the 1530 * host_lock is held. This callback is used by ibmvfc_init_event to wrap a 1531 * MAD evt with the host_lock. 1532 **/ 1533 static void ibmvfc_locked_done(struct ibmvfc_event *evt) 1534 { 1535 unsigned long flags; 1536 1537 spin_lock_irqsave(evt->vhost->host->host_lock, flags); 1538 evt->_done(evt); 1539 spin_unlock_irqrestore(evt->vhost->host->host_lock, flags); 1540 } 1541 1542 /** 1543 * ibmvfc_init_event - Initialize fields in an event struct that are always 1544 * required. 1545 * @evt: The event 1546 * @done: Routine to call when the event is responded to 1547 * @format: SRP or MAD format 1548 **/ 1549 static void ibmvfc_init_event(struct ibmvfc_event *evt, 1550 void (*done) (struct ibmvfc_event *), u8 format) 1551 { 1552 evt->cmnd = NULL; 1553 evt->sync_iu = NULL; 1554 evt->eh_comp = NULL; 1555 evt->crq.format = format; 1556 if (format == IBMVFC_CMD_FORMAT) 1557 evt->done = done; 1558 else { 1559 evt->_done = done; 1560 evt->done = ibmvfc_locked_done; 1561 } 1562 evt->hwq = 0; 1563 } 1564 1565 /** 1566 * ibmvfc_map_sg_list - Initialize scatterlist 1567 * @scmd: scsi command struct 1568 * @nseg: number of scatterlist segments 1569 * @md: memory descriptor list to initialize 1570 **/ 1571 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1572 struct srp_direct_buf *md) 1573 { 1574 int i; 1575 struct scatterlist *sg; 1576 1577 scsi_for_each_sg(scmd, sg, nseg, i) { 1578 md[i].va = cpu_to_be64(sg_dma_address(sg)); 1579 md[i].len = cpu_to_be32(sg_dma_len(sg)); 1580 md[i].key = 0; 1581 } 1582 } 1583 1584 /** 1585 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes descriptor fields 1586 * @scmd: struct scsi_cmnd with the scatterlist 1587 * @evt: ibmvfc event struct 1588 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1589 * @dev: device for which to map dma memory 1590 * 1591 * Returns: 1592 * 0 on success / non-zero on failure 1593 **/ 1594 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1595 struct ibmvfc_event *evt, 1596 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1597 { 1598 1599 int sg_mapped; 1600 struct srp_direct_buf *data = &vfc_cmd->ioba; 1601 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1602 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(evt->vhost, vfc_cmd); 1603 1604 if (cls3_error) 1605 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR); 1606 1607 sg_mapped = scsi_dma_map(scmd); 1608 if (!sg_mapped) { 1609 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC); 1610 return 0; 1611 } else if (unlikely(sg_mapped < 0)) { 1612 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1613 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1614 return sg_mapped; 1615 } 1616 1617 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1618 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE); 1619 iu->add_cdb_len |= IBMVFC_WRDATA; 1620 } else { 1621 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ); 1622 iu->add_cdb_len |= IBMVFC_RDDATA; 1623 } 1624 1625 if (sg_mapped == 1) { 1626 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1627 return 0; 1628 } 1629 1630 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST); 1631 1632 if (!evt->ext_list) { 1633 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1634 &evt->ext_list_token); 1635 1636 if (!evt->ext_list) { 1637 scsi_dma_unmap(scmd); 1638 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1639 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1640 return -ENOMEM; 1641 } 1642 } 1643 1644 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1645 1646 data->va = cpu_to_be64(evt->ext_list_token); 1647 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf)); 1648 data->key = 0; 1649 return 0; 1650 } 1651 1652 /** 1653 * ibmvfc_timeout - Internal command timeout handler 1654 * @t: struct ibmvfc_event that timed out 1655 * 1656 * Called when an internally generated command times out 1657 **/ 1658 static void ibmvfc_timeout(struct timer_list *t) 1659 { 1660 struct ibmvfc_event *evt = from_timer(evt, t, timer); 1661 struct ibmvfc_host *vhost = evt->vhost; 1662 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1663 ibmvfc_reset_host(vhost); 1664 } 1665 1666 /** 1667 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1668 * @evt: event to be sent 1669 * @vhost: ibmvfc host struct 1670 * @timeout: timeout in seconds - 0 means do not time command 1671 * 1672 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1673 **/ 1674 static int ibmvfc_send_event(struct ibmvfc_event *evt, 1675 struct ibmvfc_host *vhost, unsigned long timeout) 1676 { 1677 __be64 *crq_as_u64 = (__be64 *) &evt->crq; 1678 unsigned long flags; 1679 int rc; 1680 1681 /* Copy the IU into the transfer area */ 1682 *evt->xfer_iu = evt->iu; 1683 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1684 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); 1685 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1686 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); 1687 else 1688 BUG(); 1689 1690 timer_setup(&evt->timer, ibmvfc_timeout, 0); 1691 1692 if (timeout) { 1693 evt->timer.expires = jiffies + (timeout * HZ); 1694 add_timer(&evt->timer); 1695 } 1696 1697 spin_lock_irqsave(&evt->queue->l_lock, flags); 1698 list_add_tail(&evt->queue_list, &evt->queue->sent); 1699 atomic_set(&evt->active, 1); 1700 1701 mb(); 1702 1703 if (evt->queue->fmt == IBMVFC_SUB_CRQ_FMT) 1704 rc = ibmvfc_send_sub_crq(vhost, 1705 evt->queue->vios_cookie, 1706 be64_to_cpu(crq_as_u64[0]), 1707 be64_to_cpu(crq_as_u64[1]), 1708 0, 0); 1709 else 1710 rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), 1711 be64_to_cpu(crq_as_u64[1])); 1712 1713 if (rc) { 1714 atomic_set(&evt->active, 0); 1715 list_del(&evt->queue_list); 1716 spin_unlock_irqrestore(&evt->queue->l_lock, flags); 1717 del_timer(&evt->timer); 1718 1719 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1720 * Firmware will send a CRQ with a transport event (0xFF) to 1721 * tell this client what has happened to the transport. This 1722 * will be handled in ibmvfc_handle_crq() 1723 */ 1724 if (rc == H_CLOSED) { 1725 if (printk_ratelimit()) 1726 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1727 if (evt->cmnd) 1728 scsi_dma_unmap(evt->cmnd); 1729 ibmvfc_free_event(evt); 1730 return SCSI_MLQUEUE_HOST_BUSY; 1731 } 1732 1733 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1734 if (evt->cmnd) { 1735 evt->cmnd->result = DID_ERROR << 16; 1736 evt->done = ibmvfc_scsi_eh_done; 1737 } else 1738 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); 1739 1740 evt->done(evt); 1741 } else { 1742 spin_unlock_irqrestore(&evt->queue->l_lock, flags); 1743 ibmvfc_trc_start(evt); 1744 } 1745 1746 return 0; 1747 } 1748 1749 /** 1750 * ibmvfc_log_error - Log an error for the failed command if appropriate 1751 * @evt: ibmvfc event to log 1752 * 1753 **/ 1754 static void ibmvfc_log_error(struct ibmvfc_event *evt) 1755 { 1756 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1757 struct ibmvfc_host *vhost = evt->vhost; 1758 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 1759 struct scsi_cmnd *cmnd = evt->cmnd; 1760 const char *err = unknown_error; 1761 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 1762 int logerr = 0; 1763 int rsp_code = 0; 1764 1765 if (index >= 0) { 1766 logerr = cmd_status[index].log; 1767 err = cmd_status[index].name; 1768 } 1769 1770 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1771 return; 1772 1773 if (rsp->flags & FCP_RSP_LEN_VALID) 1774 rsp_code = rsp->data.info.rsp_code; 1775 1776 scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) " 1777 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1778 cmnd->cmnd[0], err, be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error), 1779 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1780 } 1781 1782 /** 1783 * ibmvfc_relogin - Log back into the specified device 1784 * @sdev: scsi device struct 1785 * 1786 **/ 1787 static void ibmvfc_relogin(struct scsi_device *sdev) 1788 { 1789 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1790 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1791 struct ibmvfc_target *tgt; 1792 unsigned long flags; 1793 1794 spin_lock_irqsave(vhost->host->host_lock, flags); 1795 list_for_each_entry(tgt, &vhost->targets, queue) { 1796 if (rport == tgt->rport) { 1797 ibmvfc_del_tgt(tgt); 1798 break; 1799 } 1800 } 1801 1802 ibmvfc_reinit_host(vhost); 1803 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1804 } 1805 1806 /** 1807 * ibmvfc_scsi_done - Handle responses from commands 1808 * @evt: ibmvfc event to be handled 1809 * 1810 * Used as a callback when sending scsi cmds. 1811 **/ 1812 static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1813 { 1814 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1815 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(evt->vhost, vfc_cmd); 1816 struct scsi_cmnd *cmnd = evt->cmnd; 1817 u32 rsp_len = 0; 1818 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); 1819 1820 if (cmnd) { 1821 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) 1822 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); 1823 else if (rsp->flags & FCP_RESID_UNDER) 1824 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); 1825 else 1826 scsi_set_resid(cmnd, 0); 1827 1828 if (vfc_cmd->status) { 1829 cmnd->result = ibmvfc_get_err_result(evt->vhost, vfc_cmd); 1830 1831 if (rsp->flags & FCP_RSP_LEN_VALID) 1832 rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 1833 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1834 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1835 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1836 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1837 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && 1838 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) 1839 ibmvfc_relogin(cmnd->device); 1840 1841 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1842 cmnd->result = (DID_ERROR << 16); 1843 1844 ibmvfc_log_error(evt); 1845 } 1846 1847 if (!cmnd->result && 1848 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1849 cmnd->result = (DID_ERROR << 16); 1850 1851 scsi_dma_unmap(cmnd); 1852 cmnd->scsi_done(cmnd); 1853 } 1854 1855 ibmvfc_free_event(evt); 1856 } 1857 1858 /** 1859 * ibmvfc_host_chkready - Check if the host can accept commands 1860 * @vhost: struct ibmvfc host 1861 * 1862 * Returns: 1863 * 1 if host can accept command / 0 if not 1864 **/ 1865 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1866 { 1867 int result = 0; 1868 1869 switch (vhost->state) { 1870 case IBMVFC_LINK_DEAD: 1871 case IBMVFC_HOST_OFFLINE: 1872 result = DID_NO_CONNECT << 16; 1873 break; 1874 case IBMVFC_NO_CRQ: 1875 case IBMVFC_INITIALIZING: 1876 case IBMVFC_HALTED: 1877 case IBMVFC_LINK_DOWN: 1878 result = DID_REQUEUE << 16; 1879 break; 1880 case IBMVFC_ACTIVE: 1881 result = 0; 1882 break; 1883 } 1884 1885 return result; 1886 } 1887 1888 static struct ibmvfc_cmd *ibmvfc_init_vfc_cmd(struct ibmvfc_event *evt, struct scsi_device *sdev) 1889 { 1890 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1891 struct ibmvfc_host *vhost = evt->vhost; 1892 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 1893 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 1894 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 1895 size_t offset; 1896 1897 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1898 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 1899 offset = offsetof(struct ibmvfc_cmd, v2.rsp); 1900 vfc_cmd->target_wwpn = cpu_to_be64(rport->port_name); 1901 } else 1902 offset = offsetof(struct ibmvfc_cmd, v1.rsp); 1903 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offset); 1904 vfc_cmd->resp.len = cpu_to_be32(sizeof(*rsp)); 1905 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1906 vfc_cmd->payload_len = cpu_to_be32(sizeof(*iu)); 1907 vfc_cmd->resp_len = cpu_to_be32(sizeof(*rsp)); 1908 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 1909 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); 1910 int_to_scsilun(sdev->lun, &iu->lun); 1911 1912 return vfc_cmd; 1913 } 1914 1915 /** 1916 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1917 * @shost: scsi host struct 1918 * @cmnd: struct scsi_cmnd to be executed 1919 * 1920 * Returns: 1921 * 0 on success / other on failure 1922 **/ 1923 static int ibmvfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) 1924 { 1925 struct ibmvfc_host *vhost = shost_priv(shost); 1926 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1927 struct ibmvfc_cmd *vfc_cmd; 1928 struct ibmvfc_fcp_cmd_iu *iu; 1929 struct ibmvfc_event *evt; 1930 u32 tag_and_hwq = blk_mq_unique_tag(scsi_cmd_to_rq(cmnd)); 1931 u16 hwq = blk_mq_unique_tag_to_hwq(tag_and_hwq); 1932 u16 scsi_channel; 1933 int rc; 1934 1935 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1936 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1937 cmnd->result = rc; 1938 cmnd->scsi_done(cmnd); 1939 return 0; 1940 } 1941 1942 cmnd->result = (DID_OK << 16); 1943 if (vhost->using_channels) { 1944 scsi_channel = hwq % vhost->scsi_scrqs.active_queues; 1945 evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[scsi_channel]); 1946 evt->hwq = hwq % vhost->scsi_scrqs.active_queues; 1947 } else 1948 evt = ibmvfc_get_event(&vhost->crq); 1949 1950 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1951 evt->cmnd = cmnd; 1952 1953 vfc_cmd = ibmvfc_init_vfc_cmd(evt, cmnd->device); 1954 iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 1955 1956 iu->xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); 1957 memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); 1958 1959 if (cmnd->flags & SCMD_TAGGED) { 1960 vfc_cmd->task_tag = cpu_to_be64(scsi_cmd_to_rq(cmnd)->tag); 1961 iu->pri_task_attr = IBMVFC_SIMPLE_TASK; 1962 } 1963 1964 vfc_cmd->correlation = cpu_to_be64((u64)evt); 1965 1966 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1967 return ibmvfc_send_event(evt, vhost, 0); 1968 1969 ibmvfc_free_event(evt); 1970 if (rc == -ENOMEM) 1971 return SCSI_MLQUEUE_HOST_BUSY; 1972 1973 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1974 scmd_printk(KERN_ERR, cmnd, 1975 "Failed to map DMA buffer for command. rc=%d\n", rc); 1976 1977 cmnd->result = DID_ERROR << 16; 1978 cmnd->scsi_done(cmnd); 1979 return 0; 1980 } 1981 1982 /** 1983 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1984 * @evt: ibmvfc event struct 1985 * 1986 **/ 1987 static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1988 { 1989 /* copy the response back */ 1990 if (evt->sync_iu) 1991 *evt->sync_iu = *evt->xfer_iu; 1992 1993 complete(&evt->comp); 1994 } 1995 1996 /** 1997 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 1998 * @evt: struct ibmvfc_event 1999 * 2000 **/ 2001 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 2002 { 2003 struct ibmvfc_host *vhost = evt->vhost; 2004 2005 ibmvfc_free_event(evt); 2006 vhost->aborting_passthru = 0; 2007 dev_info(vhost->dev, "Passthru command cancelled\n"); 2008 } 2009 2010 /** 2011 * ibmvfc_bsg_timeout - Handle a BSG timeout 2012 * @job: struct bsg_job that timed out 2013 * 2014 * Returns: 2015 * 0 on success / other on failure 2016 **/ 2017 static int ibmvfc_bsg_timeout(struct bsg_job *job) 2018 { 2019 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 2020 unsigned long port_id = (unsigned long)job->dd_data; 2021 struct ibmvfc_event *evt; 2022 struct ibmvfc_tmf *tmf; 2023 unsigned long flags; 2024 int rc; 2025 2026 ENTER; 2027 spin_lock_irqsave(vhost->host->host_lock, flags); 2028 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 2029 __ibmvfc_reset_host(vhost); 2030 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2031 return 0; 2032 } 2033 2034 vhost->aborting_passthru = 1; 2035 evt = ibmvfc_get_event(&vhost->crq); 2036 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 2037 2038 tmf = &evt->iu.tmf; 2039 memset(tmf, 0, sizeof(*tmf)); 2040 tmf->common.version = cpu_to_be32(1); 2041 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2042 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2043 tmf->scsi_id = cpu_to_be64(port_id); 2044 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 2045 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); 2046 rc = ibmvfc_send_event(evt, vhost, default_timeout); 2047 2048 if (rc != 0) { 2049 vhost->aborting_passthru = 0; 2050 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 2051 rc = -EIO; 2052 } else 2053 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 2054 port_id); 2055 2056 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2057 2058 LEAVE; 2059 return rc; 2060 } 2061 2062 /** 2063 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 2064 * @vhost: struct ibmvfc_host to send command 2065 * @port_id: port ID to send command 2066 * 2067 * Returns: 2068 * 0 on success / other on failure 2069 **/ 2070 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 2071 { 2072 struct ibmvfc_port_login *plogi; 2073 struct ibmvfc_target *tgt; 2074 struct ibmvfc_event *evt; 2075 union ibmvfc_iu rsp_iu; 2076 unsigned long flags; 2077 int rc = 0, issue_login = 1; 2078 2079 ENTER; 2080 spin_lock_irqsave(vhost->host->host_lock, flags); 2081 list_for_each_entry(tgt, &vhost->targets, queue) { 2082 if (tgt->scsi_id == port_id) { 2083 issue_login = 0; 2084 break; 2085 } 2086 } 2087 2088 if (!issue_login) 2089 goto unlock_out; 2090 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 2091 goto unlock_out; 2092 2093 evt = ibmvfc_get_event(&vhost->crq); 2094 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2095 plogi = &evt->iu.plogi; 2096 memset(plogi, 0, sizeof(*plogi)); 2097 plogi->common.version = cpu_to_be32(1); 2098 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 2099 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 2100 plogi->scsi_id = cpu_to_be64(port_id); 2101 evt->sync_iu = &rsp_iu; 2102 init_completion(&evt->comp); 2103 2104 rc = ibmvfc_send_event(evt, vhost, default_timeout); 2105 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2106 2107 if (rc) 2108 return -EIO; 2109 2110 wait_for_completion(&evt->comp); 2111 2112 if (rsp_iu.plogi.common.status) 2113 rc = -EIO; 2114 2115 spin_lock_irqsave(vhost->host->host_lock, flags); 2116 ibmvfc_free_event(evt); 2117 unlock_out: 2118 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2119 LEAVE; 2120 return rc; 2121 } 2122 2123 /** 2124 * ibmvfc_bsg_request - Handle a BSG request 2125 * @job: struct bsg_job to be executed 2126 * 2127 * Returns: 2128 * 0 on success / other on failure 2129 **/ 2130 static int ibmvfc_bsg_request(struct bsg_job *job) 2131 { 2132 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 2133 struct fc_rport *rport = fc_bsg_to_rport(job); 2134 struct ibmvfc_passthru_mad *mad; 2135 struct ibmvfc_event *evt; 2136 union ibmvfc_iu rsp_iu; 2137 unsigned long flags, port_id = -1; 2138 struct fc_bsg_request *bsg_request = job->request; 2139 struct fc_bsg_reply *bsg_reply = job->reply; 2140 unsigned int code = bsg_request->msgcode; 2141 int rc = 0, req_seg, rsp_seg, issue_login = 0; 2142 u32 fc_flags, rsp_len; 2143 2144 ENTER; 2145 bsg_reply->reply_payload_rcv_len = 0; 2146 if (rport) 2147 port_id = rport->port_id; 2148 2149 switch (code) { 2150 case FC_BSG_HST_ELS_NOLOGIN: 2151 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) | 2152 (bsg_request->rqst_data.h_els.port_id[1] << 8) | 2153 bsg_request->rqst_data.h_els.port_id[2]; 2154 fallthrough; 2155 case FC_BSG_RPT_ELS: 2156 fc_flags = IBMVFC_FC_ELS; 2157 break; 2158 case FC_BSG_HST_CT: 2159 issue_login = 1; 2160 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) | 2161 (bsg_request->rqst_data.h_ct.port_id[1] << 8) | 2162 bsg_request->rqst_data.h_ct.port_id[2]; 2163 fallthrough; 2164 case FC_BSG_RPT_CT: 2165 fc_flags = IBMVFC_FC_CT_IU; 2166 break; 2167 default: 2168 return -ENOTSUPP; 2169 } 2170 2171 if (port_id == -1) 2172 return -EINVAL; 2173 if (!mutex_trylock(&vhost->passthru_mutex)) 2174 return -EBUSY; 2175 2176 job->dd_data = (void *)port_id; 2177 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 2178 job->request_payload.sg_cnt, DMA_TO_DEVICE); 2179 2180 if (!req_seg) { 2181 mutex_unlock(&vhost->passthru_mutex); 2182 return -ENOMEM; 2183 } 2184 2185 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 2186 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 2187 2188 if (!rsp_seg) { 2189 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 2190 job->request_payload.sg_cnt, DMA_TO_DEVICE); 2191 mutex_unlock(&vhost->passthru_mutex); 2192 return -ENOMEM; 2193 } 2194 2195 if (req_seg > 1 || rsp_seg > 1) { 2196 rc = -EINVAL; 2197 goto out; 2198 } 2199 2200 if (issue_login) 2201 rc = ibmvfc_bsg_plogi(vhost, port_id); 2202 2203 spin_lock_irqsave(vhost->host->host_lock, flags); 2204 2205 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 2206 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 2207 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2208 goto out; 2209 } 2210 2211 evt = ibmvfc_get_event(&vhost->crq); 2212 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2213 mad = &evt->iu.passthru; 2214 2215 memset(mad, 0, sizeof(*mad)); 2216 mad->common.version = cpu_to_be32(1); 2217 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 2218 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 2219 2220 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + 2221 offsetof(struct ibmvfc_passthru_mad, iu)); 2222 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 2223 2224 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); 2225 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); 2226 mad->iu.flags = cpu_to_be32(fc_flags); 2227 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 2228 2229 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); 2230 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); 2231 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); 2232 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); 2233 mad->iu.scsi_id = cpu_to_be64(port_id); 2234 mad->iu.tag = cpu_to_be64((u64)evt); 2235 rsp_len = be32_to_cpu(mad->iu.rsp.len); 2236 2237 evt->sync_iu = &rsp_iu; 2238 init_completion(&evt->comp); 2239 rc = ibmvfc_send_event(evt, vhost, 0); 2240 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2241 2242 if (rc) { 2243 rc = -EIO; 2244 goto out; 2245 } 2246 2247 wait_for_completion(&evt->comp); 2248 2249 if (rsp_iu.passthru.common.status) 2250 rc = -EIO; 2251 else 2252 bsg_reply->reply_payload_rcv_len = rsp_len; 2253 2254 spin_lock_irqsave(vhost->host->host_lock, flags); 2255 ibmvfc_free_event(evt); 2256 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2257 bsg_reply->result = rc; 2258 bsg_job_done(job, bsg_reply->result, 2259 bsg_reply->reply_payload_rcv_len); 2260 rc = 0; 2261 out: 2262 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 2263 job->request_payload.sg_cnt, DMA_TO_DEVICE); 2264 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 2265 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 2266 mutex_unlock(&vhost->passthru_mutex); 2267 LEAVE; 2268 return rc; 2269 } 2270 2271 /** 2272 * ibmvfc_reset_device - Reset the device with the specified reset type 2273 * @sdev: scsi device to reset 2274 * @type: reset type 2275 * @desc: reset type description for log messages 2276 * 2277 * Returns: 2278 * 0 on success / other on failure 2279 **/ 2280 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 2281 { 2282 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2283 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2284 struct ibmvfc_cmd *tmf; 2285 struct ibmvfc_event *evt = NULL; 2286 union ibmvfc_iu rsp_iu; 2287 struct ibmvfc_fcp_cmd_iu *iu; 2288 struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); 2289 int rsp_rc = -EBUSY; 2290 unsigned long flags; 2291 int rsp_code = 0; 2292 2293 spin_lock_irqsave(vhost->host->host_lock, flags); 2294 if (vhost->state == IBMVFC_ACTIVE) { 2295 if (vhost->using_channels) 2296 evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[0]); 2297 else 2298 evt = ibmvfc_get_event(&vhost->crq); 2299 2300 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2301 tmf = ibmvfc_init_vfc_cmd(evt, sdev); 2302 iu = ibmvfc_get_fcp_iu(vhost, tmf); 2303 2304 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2305 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 2306 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2307 iu->tmf_flags = type; 2308 evt->sync_iu = &rsp_iu; 2309 2310 init_completion(&evt->comp); 2311 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2312 } 2313 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2314 2315 if (rsp_rc != 0) { 2316 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 2317 desc, rsp_rc); 2318 return -EIO; 2319 } 2320 2321 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2322 wait_for_completion(&evt->comp); 2323 2324 if (rsp_iu.cmd.status) 2325 rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); 2326 2327 if (rsp_code) { 2328 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2329 rsp_code = fc_rsp->data.info.rsp_code; 2330 2331 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2332 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, 2333 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2334 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, 2335 fc_rsp->scsi_status); 2336 rsp_rc = -EIO; 2337 } else 2338 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2339 2340 spin_lock_irqsave(vhost->host->host_lock, flags); 2341 ibmvfc_free_event(evt); 2342 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2343 return rsp_rc; 2344 } 2345 2346 /** 2347 * ibmvfc_match_rport - Match function for specified remote port 2348 * @evt: ibmvfc event struct 2349 * @rport: device to match 2350 * 2351 * Returns: 2352 * 1 if event matches rport / 0 if event does not match rport 2353 **/ 2354 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2355 { 2356 struct fc_rport *cmd_rport; 2357 2358 if (evt->cmnd) { 2359 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2360 if (cmd_rport == rport) 2361 return 1; 2362 } 2363 return 0; 2364 } 2365 2366 /** 2367 * ibmvfc_match_target - Match function for specified target 2368 * @evt: ibmvfc event struct 2369 * @device: device to match (starget) 2370 * 2371 * Returns: 2372 * 1 if event matches starget / 0 if event does not match starget 2373 **/ 2374 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2375 { 2376 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2377 return 1; 2378 return 0; 2379 } 2380 2381 /** 2382 * ibmvfc_match_lun - Match function for specified LUN 2383 * @evt: ibmvfc event struct 2384 * @device: device to match (sdev) 2385 * 2386 * Returns: 2387 * 1 if event matches sdev / 0 if event does not match sdev 2388 **/ 2389 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2390 { 2391 if (evt->cmnd && evt->cmnd->device == device) 2392 return 1; 2393 return 0; 2394 } 2395 2396 /** 2397 * ibmvfc_event_is_free - Check if event is free or not 2398 * @evt: ibmvfc event struct 2399 * 2400 * Returns: 2401 * true / false 2402 **/ 2403 static bool ibmvfc_event_is_free(struct ibmvfc_event *evt) 2404 { 2405 struct ibmvfc_event *loop_evt; 2406 2407 list_for_each_entry(loop_evt, &evt->queue->free, queue_list) 2408 if (loop_evt == evt) 2409 return true; 2410 2411 return false; 2412 } 2413 2414 /** 2415 * ibmvfc_wait_for_ops - Wait for ops to complete 2416 * @vhost: ibmvfc host struct 2417 * @device: device to match (starget or sdev) 2418 * @match: match function 2419 * 2420 * Returns: 2421 * SUCCESS / FAILED 2422 **/ 2423 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2424 int (*match) (struct ibmvfc_event *, void *)) 2425 { 2426 struct ibmvfc_event *evt; 2427 DECLARE_COMPLETION_ONSTACK(comp); 2428 int wait, i, q_index, q_size; 2429 unsigned long flags; 2430 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2431 struct ibmvfc_queue *queues; 2432 2433 ENTER; 2434 if (vhost->mq_enabled && vhost->using_channels) { 2435 queues = vhost->scsi_scrqs.scrqs; 2436 q_size = vhost->scsi_scrqs.active_queues; 2437 } else { 2438 queues = &vhost->crq; 2439 q_size = 1; 2440 } 2441 2442 do { 2443 wait = 0; 2444 spin_lock_irqsave(vhost->host->host_lock, flags); 2445 for (q_index = 0; q_index < q_size; q_index++) { 2446 spin_lock(&queues[q_index].l_lock); 2447 for (i = 0; i < queues[q_index].evt_pool.size; i++) { 2448 evt = &queues[q_index].evt_pool.events[i]; 2449 if (!ibmvfc_event_is_free(evt)) { 2450 if (match(evt, device)) { 2451 evt->eh_comp = ∁ 2452 wait++; 2453 } 2454 } 2455 } 2456 spin_unlock(&queues[q_index].l_lock); 2457 } 2458 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2459 2460 if (wait) { 2461 timeout = wait_for_completion_timeout(&comp, timeout); 2462 2463 if (!timeout) { 2464 wait = 0; 2465 spin_lock_irqsave(vhost->host->host_lock, flags); 2466 for (q_index = 0; q_index < q_size; q_index++) { 2467 spin_lock(&queues[q_index].l_lock); 2468 for (i = 0; i < queues[q_index].evt_pool.size; i++) { 2469 evt = &queues[q_index].evt_pool.events[i]; 2470 if (!ibmvfc_event_is_free(evt)) { 2471 if (match(evt, device)) { 2472 evt->eh_comp = NULL; 2473 wait++; 2474 } 2475 } 2476 } 2477 spin_unlock(&queues[q_index].l_lock); 2478 } 2479 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2480 if (wait) 2481 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2482 LEAVE; 2483 return wait ? FAILED : SUCCESS; 2484 } 2485 } 2486 } while (wait); 2487 2488 LEAVE; 2489 return SUCCESS; 2490 } 2491 2492 static struct ibmvfc_event *ibmvfc_init_tmf(struct ibmvfc_queue *queue, 2493 struct scsi_device *sdev, 2494 int type) 2495 { 2496 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2497 struct scsi_target *starget = scsi_target(sdev); 2498 struct fc_rport *rport = starget_to_rport(starget); 2499 struct ibmvfc_event *evt; 2500 struct ibmvfc_tmf *tmf; 2501 2502 evt = ibmvfc_get_event(queue); 2503 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2504 2505 tmf = &evt->iu.tmf; 2506 memset(tmf, 0, sizeof(*tmf)); 2507 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 2508 tmf->common.version = cpu_to_be32(2); 2509 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2510 } else { 2511 tmf->common.version = cpu_to_be32(1); 2512 } 2513 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2514 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2515 tmf->scsi_id = cpu_to_be64(rport->port_id); 2516 int_to_scsilun(sdev->lun, &tmf->lun); 2517 if (!ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPRESS_ABTS)) 2518 type &= ~IBMVFC_TMF_SUPPRESS_ABTS; 2519 if (vhost->state == IBMVFC_ACTIVE) 2520 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); 2521 else 2522 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); 2523 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2524 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); 2525 2526 init_completion(&evt->comp); 2527 2528 return evt; 2529 } 2530 2531 static int ibmvfc_cancel_all_mq(struct scsi_device *sdev, int type) 2532 { 2533 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2534 struct ibmvfc_event *evt, *found_evt, *temp; 2535 struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; 2536 unsigned long flags; 2537 int num_hwq, i; 2538 int fail = 0; 2539 LIST_HEAD(cancelq); 2540 u16 status; 2541 2542 ENTER; 2543 spin_lock_irqsave(vhost->host->host_lock, flags); 2544 num_hwq = vhost->scsi_scrqs.active_queues; 2545 for (i = 0; i < num_hwq; i++) { 2546 spin_lock(queues[i].q_lock); 2547 spin_lock(&queues[i].l_lock); 2548 found_evt = NULL; 2549 list_for_each_entry(evt, &queues[i].sent, queue_list) { 2550 if (evt->cmnd && evt->cmnd->device == sdev) { 2551 found_evt = evt; 2552 break; 2553 } 2554 } 2555 spin_unlock(&queues[i].l_lock); 2556 2557 if (found_evt && vhost->logged_in) { 2558 evt = ibmvfc_init_tmf(&queues[i], sdev, type); 2559 evt->sync_iu = &queues[i].cancel_rsp; 2560 ibmvfc_send_event(evt, vhost, default_timeout); 2561 list_add_tail(&evt->cancel, &cancelq); 2562 } 2563 2564 spin_unlock(queues[i].q_lock); 2565 } 2566 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2567 2568 if (list_empty(&cancelq)) { 2569 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2570 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2571 return 0; 2572 } 2573 2574 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2575 2576 list_for_each_entry_safe(evt, temp, &cancelq, cancel) { 2577 wait_for_completion(&evt->comp); 2578 status = be16_to_cpu(evt->queue->cancel_rsp.mad_common.status); 2579 list_del(&evt->cancel); 2580 ibmvfc_free_event(evt); 2581 2582 if (status != IBMVFC_MAD_SUCCESS) { 2583 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2584 switch (status) { 2585 case IBMVFC_MAD_DRIVER_FAILED: 2586 case IBMVFC_MAD_CRQ_ERROR: 2587 /* Host adapter most likely going through reset, return success to 2588 * the caller will wait for the command being cancelled to get returned 2589 */ 2590 break; 2591 default: 2592 fail = 1; 2593 break; 2594 } 2595 } 2596 } 2597 2598 if (fail) 2599 return -EIO; 2600 2601 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2602 LEAVE; 2603 return 0; 2604 } 2605 2606 static int ibmvfc_cancel_all_sq(struct scsi_device *sdev, int type) 2607 { 2608 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2609 struct ibmvfc_event *evt, *found_evt; 2610 union ibmvfc_iu rsp; 2611 int rsp_rc = -EBUSY; 2612 unsigned long flags; 2613 u16 status; 2614 2615 ENTER; 2616 found_evt = NULL; 2617 spin_lock_irqsave(vhost->host->host_lock, flags); 2618 spin_lock(&vhost->crq.l_lock); 2619 list_for_each_entry(evt, &vhost->crq.sent, queue_list) { 2620 if (evt->cmnd && evt->cmnd->device == sdev) { 2621 found_evt = evt; 2622 break; 2623 } 2624 } 2625 spin_unlock(&vhost->crq.l_lock); 2626 2627 if (!found_evt) { 2628 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2629 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2630 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2631 return 0; 2632 } 2633 2634 if (vhost->logged_in) { 2635 evt = ibmvfc_init_tmf(&vhost->crq, sdev, type); 2636 evt->sync_iu = &rsp; 2637 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2638 } 2639 2640 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2641 2642 if (rsp_rc != 0) { 2643 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2644 /* If failure is received, the host adapter is most likely going 2645 through reset, return success so the caller will wait for the command 2646 being cancelled to get returned */ 2647 return 0; 2648 } 2649 2650 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2651 2652 wait_for_completion(&evt->comp); 2653 status = be16_to_cpu(rsp.mad_common.status); 2654 spin_lock_irqsave(vhost->host->host_lock, flags); 2655 ibmvfc_free_event(evt); 2656 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2657 2658 if (status != IBMVFC_MAD_SUCCESS) { 2659 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2660 switch (status) { 2661 case IBMVFC_MAD_DRIVER_FAILED: 2662 case IBMVFC_MAD_CRQ_ERROR: 2663 /* Host adapter most likely going through reset, return success to 2664 the caller will wait for the command being cancelled to get returned */ 2665 return 0; 2666 default: 2667 return -EIO; 2668 }; 2669 } 2670 2671 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2672 return 0; 2673 } 2674 2675 /** 2676 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2677 * @sdev: scsi device to cancel commands 2678 * @type: type of error recovery being performed 2679 * 2680 * This sends a cancel to the VIOS for the specified device. This does 2681 * NOT send any abort to the actual device. That must be done separately. 2682 * 2683 * Returns: 2684 * 0 on success / other on failure 2685 **/ 2686 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2687 { 2688 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2689 2690 if (vhost->mq_enabled && vhost->using_channels) 2691 return ibmvfc_cancel_all_mq(sdev, type); 2692 else 2693 return ibmvfc_cancel_all_sq(sdev, type); 2694 } 2695 2696 /** 2697 * ibmvfc_match_key - Match function for specified cancel key 2698 * @evt: ibmvfc event struct 2699 * @key: cancel key to match 2700 * 2701 * Returns: 2702 * 1 if event matches key / 0 if event does not match key 2703 **/ 2704 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2705 { 2706 unsigned long cancel_key = (unsigned long)key; 2707 2708 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2709 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) 2710 return 1; 2711 return 0; 2712 } 2713 2714 /** 2715 * ibmvfc_match_evt - Match function for specified event 2716 * @evt: ibmvfc event struct 2717 * @match: event to match 2718 * 2719 * Returns: 2720 * 1 if event matches key / 0 if event does not match key 2721 **/ 2722 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) 2723 { 2724 if (evt == match) 2725 return 1; 2726 return 0; 2727 } 2728 2729 /** 2730 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2731 * @sdev: scsi device to abort commands 2732 * 2733 * This sends an Abort Task Set to the VIOS for the specified device. This does 2734 * NOT send any cancel to the VIOS. That must be done separately. 2735 * 2736 * Returns: 2737 * 0 on success / other on failure 2738 **/ 2739 static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2740 { 2741 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2742 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2743 struct ibmvfc_cmd *tmf; 2744 struct ibmvfc_event *evt, *found_evt; 2745 union ibmvfc_iu rsp_iu; 2746 struct ibmvfc_fcp_cmd_iu *iu; 2747 struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); 2748 int rc, rsp_rc = -EBUSY; 2749 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2750 int rsp_code = 0; 2751 2752 found_evt = NULL; 2753 spin_lock_irqsave(vhost->host->host_lock, flags); 2754 spin_lock(&vhost->crq.l_lock); 2755 list_for_each_entry(evt, &vhost->crq.sent, queue_list) { 2756 if (evt->cmnd && evt->cmnd->device == sdev) { 2757 found_evt = evt; 2758 break; 2759 } 2760 } 2761 spin_unlock(&vhost->crq.l_lock); 2762 2763 if (!found_evt) { 2764 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2765 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2766 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2767 return 0; 2768 } 2769 2770 if (vhost->state == IBMVFC_ACTIVE) { 2771 evt = ibmvfc_get_event(&vhost->crq); 2772 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2773 tmf = ibmvfc_init_vfc_cmd(evt, sdev); 2774 iu = ibmvfc_get_fcp_iu(vhost, tmf); 2775 2776 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 2777 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2778 iu->tmf_flags = IBMVFC_ABORT_TASK_SET; 2779 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2780 evt->sync_iu = &rsp_iu; 2781 2782 tmf->correlation = cpu_to_be64((u64)evt); 2783 2784 init_completion(&evt->comp); 2785 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2786 } 2787 2788 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2789 2790 if (rsp_rc != 0) { 2791 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2792 return -EIO; 2793 } 2794 2795 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2796 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2797 2798 if (!timeout) { 2799 rc = ibmvfc_cancel_all(sdev, 0); 2800 if (!rc) { 2801 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2802 if (rc == SUCCESS) 2803 rc = 0; 2804 } 2805 2806 if (rc) { 2807 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2808 ibmvfc_reset_host(vhost); 2809 rsp_rc = -EIO; 2810 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2811 2812 if (rc == SUCCESS) 2813 rsp_rc = 0; 2814 2815 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); 2816 if (rc != SUCCESS) { 2817 spin_lock_irqsave(vhost->host->host_lock, flags); 2818 ibmvfc_hard_reset_host(vhost); 2819 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2820 rsp_rc = 0; 2821 } 2822 2823 goto out; 2824 } 2825 } 2826 2827 if (rsp_iu.cmd.status) 2828 rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); 2829 2830 if (rsp_code) { 2831 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2832 rsp_code = fc_rsp->data.info.rsp_code; 2833 2834 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2835 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2836 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2837 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, 2838 fc_rsp->scsi_status); 2839 rsp_rc = -EIO; 2840 } else 2841 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2842 2843 out: 2844 spin_lock_irqsave(vhost->host->host_lock, flags); 2845 ibmvfc_free_event(evt); 2846 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2847 return rsp_rc; 2848 } 2849 2850 /** 2851 * ibmvfc_eh_abort_handler - Abort a command 2852 * @cmd: scsi command to abort 2853 * 2854 * Returns: 2855 * SUCCESS / FAST_IO_FAIL / FAILED 2856 **/ 2857 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2858 { 2859 struct scsi_device *sdev = cmd->device; 2860 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2861 int cancel_rc, block_rc; 2862 int rc = FAILED; 2863 2864 ENTER; 2865 block_rc = fc_block_scsi_eh(cmd); 2866 ibmvfc_wait_while_resetting(vhost); 2867 if (block_rc != FAST_IO_FAIL) { 2868 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2869 ibmvfc_abort_task_set(sdev); 2870 } else 2871 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2872 2873 if (!cancel_rc) 2874 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2875 2876 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2877 rc = FAST_IO_FAIL; 2878 2879 LEAVE; 2880 return rc; 2881 } 2882 2883 /** 2884 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2885 * @cmd: scsi command struct 2886 * 2887 * Returns: 2888 * SUCCESS / FAST_IO_FAIL / FAILED 2889 **/ 2890 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2891 { 2892 struct scsi_device *sdev = cmd->device; 2893 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2894 int cancel_rc, block_rc, reset_rc = 0; 2895 int rc = FAILED; 2896 2897 ENTER; 2898 block_rc = fc_block_scsi_eh(cmd); 2899 ibmvfc_wait_while_resetting(vhost); 2900 if (block_rc != FAST_IO_FAIL) { 2901 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2902 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2903 } else 2904 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2905 2906 if (!cancel_rc && !reset_rc) 2907 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2908 2909 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2910 rc = FAST_IO_FAIL; 2911 2912 LEAVE; 2913 return rc; 2914 } 2915 2916 /** 2917 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function 2918 * @sdev: scsi device struct 2919 * @data: return code 2920 * 2921 **/ 2922 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) 2923 { 2924 unsigned long *rc = data; 2925 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2926 } 2927 2928 /** 2929 * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function 2930 * @sdev: scsi device struct 2931 * @data: return code 2932 * 2933 **/ 2934 static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data) 2935 { 2936 unsigned long *rc = data; 2937 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2938 } 2939 2940 /** 2941 * ibmvfc_eh_target_reset_handler - Reset the target 2942 * @cmd: scsi command struct 2943 * 2944 * Returns: 2945 * SUCCESS / FAST_IO_FAIL / FAILED 2946 **/ 2947 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2948 { 2949 struct scsi_device *sdev = cmd->device; 2950 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2951 struct scsi_target *starget = scsi_target(sdev); 2952 int block_rc; 2953 int reset_rc = 0; 2954 int rc = FAILED; 2955 unsigned long cancel_rc = 0; 2956 2957 ENTER; 2958 block_rc = fc_block_scsi_eh(cmd); 2959 ibmvfc_wait_while_resetting(vhost); 2960 if (block_rc != FAST_IO_FAIL) { 2961 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset); 2962 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2963 } else 2964 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); 2965 2966 if (!cancel_rc && !reset_rc) 2967 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2968 2969 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2970 rc = FAST_IO_FAIL; 2971 2972 LEAVE; 2973 return rc; 2974 } 2975 2976 /** 2977 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2978 * @cmd: struct scsi_cmnd having problems 2979 * 2980 **/ 2981 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2982 { 2983 int rc; 2984 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2985 2986 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2987 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2988 2989 return rc ? FAILED : SUCCESS; 2990 } 2991 2992 /** 2993 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2994 * @rport: rport struct 2995 * 2996 * Return value: 2997 * none 2998 **/ 2999 static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 3000 { 3001 struct Scsi_Host *shost = rport_to_shost(rport); 3002 struct ibmvfc_host *vhost = shost_priv(shost); 3003 struct fc_rport *dev_rport; 3004 struct scsi_device *sdev; 3005 struct ibmvfc_target *tgt; 3006 unsigned long rc, flags; 3007 unsigned int found; 3008 3009 ENTER; 3010 shost_for_each_device(sdev, shost) { 3011 dev_rport = starget_to_rport(scsi_target(sdev)); 3012 if (dev_rport != rport) 3013 continue; 3014 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 3015 } 3016 3017 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 3018 3019 if (rc == FAILED) 3020 ibmvfc_issue_fc_host_lip(shost); 3021 3022 spin_lock_irqsave(shost->host_lock, flags); 3023 found = 0; 3024 list_for_each_entry(tgt, &vhost->targets, queue) { 3025 if (tgt->scsi_id == rport->port_id) { 3026 found++; 3027 break; 3028 } 3029 } 3030 3031 if (found && tgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 3032 /* 3033 * If we get here, that means we previously attempted to send 3034 * an implicit logout to the target but it failed, most likely 3035 * due to I/O being pending, so we need to send it again 3036 */ 3037 ibmvfc_del_tgt(tgt); 3038 ibmvfc_reinit_host(vhost); 3039 } 3040 3041 spin_unlock_irqrestore(shost->host_lock, flags); 3042 LEAVE; 3043 } 3044 3045 static const struct ibmvfc_async_desc ae_desc [] = { 3046 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3047 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3048 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3049 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3050 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3051 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, 3052 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, 3053 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, 3054 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, 3055 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, 3056 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, 3057 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, 3058 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, 3059 }; 3060 3061 static const struct ibmvfc_async_desc unknown_ae = { 3062 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL 3063 }; 3064 3065 /** 3066 * ibmvfc_get_ae_desc - Get text description for async event 3067 * @ae: async event 3068 * 3069 **/ 3070 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 3071 { 3072 int i; 3073 3074 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 3075 if (ae_desc[i].ae == ae) 3076 return &ae_desc[i]; 3077 3078 return &unknown_ae; 3079 } 3080 3081 static const struct { 3082 enum ibmvfc_ae_link_state state; 3083 const char *desc; 3084 } link_desc [] = { 3085 { IBMVFC_AE_LS_LINK_UP, " link up" }, 3086 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 3087 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 3088 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 3089 }; 3090 3091 /** 3092 * ibmvfc_get_link_state - Get text description for link state 3093 * @state: link state 3094 * 3095 **/ 3096 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 3097 { 3098 int i; 3099 3100 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 3101 if (link_desc[i].state == state) 3102 return link_desc[i].desc; 3103 3104 return ""; 3105 } 3106 3107 /** 3108 * ibmvfc_handle_async - Handle an async event from the adapter 3109 * @crq: crq to process 3110 * @vhost: ibmvfc host struct 3111 * 3112 **/ 3113 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 3114 struct ibmvfc_host *vhost) 3115 { 3116 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); 3117 struct ibmvfc_target *tgt; 3118 3119 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 3120 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id), 3121 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name), 3122 ibmvfc_get_link_state(crq->link_state)); 3123 3124 switch (be64_to_cpu(crq->event)) { 3125 case IBMVFC_AE_RESUME: 3126 switch (crq->link_state) { 3127 case IBMVFC_AE_LS_LINK_DOWN: 3128 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3129 break; 3130 case IBMVFC_AE_LS_LINK_DEAD: 3131 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3132 break; 3133 case IBMVFC_AE_LS_LINK_UP: 3134 case IBMVFC_AE_LS_LINK_BOUNCED: 3135 default: 3136 vhost->events_to_log |= IBMVFC_AE_LINKUP; 3137 vhost->delay_init = 1; 3138 __ibmvfc_reset_host(vhost); 3139 break; 3140 } 3141 3142 break; 3143 case IBMVFC_AE_LINK_UP: 3144 vhost->events_to_log |= IBMVFC_AE_LINKUP; 3145 vhost->delay_init = 1; 3146 __ibmvfc_reset_host(vhost); 3147 break; 3148 case IBMVFC_AE_SCN_FABRIC: 3149 case IBMVFC_AE_SCN_DOMAIN: 3150 vhost->events_to_log |= IBMVFC_AE_RSCN; 3151 if (vhost->state < IBMVFC_HALTED) { 3152 vhost->delay_init = 1; 3153 __ibmvfc_reset_host(vhost); 3154 } 3155 break; 3156 case IBMVFC_AE_SCN_NPORT: 3157 case IBMVFC_AE_SCN_GROUP: 3158 vhost->events_to_log |= IBMVFC_AE_RSCN; 3159 ibmvfc_reinit_host(vhost); 3160 break; 3161 case IBMVFC_AE_ELS_LOGO: 3162 case IBMVFC_AE_ELS_PRLO: 3163 case IBMVFC_AE_ELS_PLOGI: 3164 list_for_each_entry(tgt, &vhost->targets, queue) { 3165 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 3166 break; 3167 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) 3168 continue; 3169 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) 3170 continue; 3171 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) 3172 continue; 3173 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) 3174 tgt->logo_rcvd = 1; 3175 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { 3176 ibmvfc_del_tgt(tgt); 3177 ibmvfc_reinit_host(vhost); 3178 } 3179 } 3180 break; 3181 case IBMVFC_AE_LINK_DOWN: 3182 case IBMVFC_AE_ADAPTER_FAILED: 3183 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3184 break; 3185 case IBMVFC_AE_LINK_DEAD: 3186 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3187 break; 3188 case IBMVFC_AE_HALT: 3189 ibmvfc_link_down(vhost, IBMVFC_HALTED); 3190 break; 3191 default: 3192 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 3193 break; 3194 } 3195 } 3196 3197 /** 3198 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 3199 * @crq: Command/Response queue 3200 * @vhost: ibmvfc host struct 3201 * @evt_doneq: Event done queue 3202 * 3203 **/ 3204 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost, 3205 struct list_head *evt_doneq) 3206 { 3207 long rc; 3208 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 3209 3210 switch (crq->valid) { 3211 case IBMVFC_CRQ_INIT_RSP: 3212 switch (crq->format) { 3213 case IBMVFC_CRQ_INIT: 3214 dev_info(vhost->dev, "Partner initialized\n"); 3215 /* Send back a response */ 3216 rc = ibmvfc_send_crq_init_complete(vhost); 3217 if (rc == 0) 3218 ibmvfc_init_host(vhost); 3219 else 3220 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 3221 break; 3222 case IBMVFC_CRQ_INIT_COMPLETE: 3223 dev_info(vhost->dev, "Partner initialization complete\n"); 3224 ibmvfc_init_host(vhost); 3225 break; 3226 default: 3227 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 3228 } 3229 return; 3230 case IBMVFC_CRQ_XPORT_EVENT: 3231 vhost->state = IBMVFC_NO_CRQ; 3232 vhost->logged_in = 0; 3233 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3234 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 3235 /* We need to re-setup the interpartition connection */ 3236 dev_info(vhost->dev, "Partition migrated, Re-enabling adapter\n"); 3237 vhost->client_migrated = 1; 3238 ibmvfc_purge_requests(vhost, DID_REQUEUE); 3239 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3240 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 3241 } else if (crq->format == IBMVFC_PARTNER_FAILED || crq->format == IBMVFC_PARTNER_DEREGISTER) { 3242 dev_err(vhost->dev, "Host partner adapter deregistered or failed (rc=%d)\n", crq->format); 3243 ibmvfc_purge_requests(vhost, DID_ERROR); 3244 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3245 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 3246 } else { 3247 dev_err(vhost->dev, "Received unknown transport event from partner (rc=%d)\n", crq->format); 3248 } 3249 return; 3250 case IBMVFC_CRQ_CMD_RSP: 3251 break; 3252 default: 3253 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 3254 return; 3255 } 3256 3257 if (crq->format == IBMVFC_ASYNC_EVENT) 3258 return; 3259 3260 /* The only kind of payload CRQs we should get are responses to 3261 * things we send. Make sure this response is to something we 3262 * actually sent 3263 */ 3264 if (unlikely(!ibmvfc_valid_event(&vhost->crq.evt_pool, evt))) { 3265 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 3266 crq->ioba); 3267 return; 3268 } 3269 3270 if (unlikely(atomic_dec_if_positive(&evt->active))) { 3271 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 3272 crq->ioba); 3273 return; 3274 } 3275 3276 spin_lock(&evt->queue->l_lock); 3277 list_move_tail(&evt->queue_list, evt_doneq); 3278 spin_unlock(&evt->queue->l_lock); 3279 } 3280 3281 /** 3282 * ibmvfc_scan_finished - Check if the device scan is done. 3283 * @shost: scsi host struct 3284 * @time: current elapsed time 3285 * 3286 * Returns: 3287 * 0 if scan is not done / 1 if scan is done 3288 **/ 3289 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 3290 { 3291 unsigned long flags; 3292 struct ibmvfc_host *vhost = shost_priv(shost); 3293 int done = 0; 3294 3295 spin_lock_irqsave(shost->host_lock, flags); 3296 if (!vhost->scan_timeout) 3297 done = 1; 3298 else if (time >= (vhost->scan_timeout * HZ)) { 3299 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 3300 "continuing initialization\n", vhost->scan_timeout); 3301 done = 1; 3302 } 3303 3304 if (vhost->scan_complete) { 3305 vhost->scan_timeout = init_timeout; 3306 done = 1; 3307 } 3308 spin_unlock_irqrestore(shost->host_lock, flags); 3309 return done; 3310 } 3311 3312 /** 3313 * ibmvfc_slave_alloc - Setup the device's task set value 3314 * @sdev: struct scsi_device device to configure 3315 * 3316 * Set the device's task set value so that error handling works as 3317 * expected. 3318 * 3319 * Returns: 3320 * 0 on success / -ENXIO if device does not exist 3321 **/ 3322 static int ibmvfc_slave_alloc(struct scsi_device *sdev) 3323 { 3324 struct Scsi_Host *shost = sdev->host; 3325 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 3326 struct ibmvfc_host *vhost = shost_priv(shost); 3327 unsigned long flags = 0; 3328 3329 if (!rport || fc_remote_port_chkready(rport)) 3330 return -ENXIO; 3331 3332 spin_lock_irqsave(shost->host_lock, flags); 3333 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 3334 spin_unlock_irqrestore(shost->host_lock, flags); 3335 return 0; 3336 } 3337 3338 /** 3339 * ibmvfc_target_alloc - Setup the target's task set value 3340 * @starget: struct scsi_target 3341 * 3342 * Set the target's task set value so that error handling works as 3343 * expected. 3344 * 3345 * Returns: 3346 * 0 on success / -ENXIO if device does not exist 3347 **/ 3348 static int ibmvfc_target_alloc(struct scsi_target *starget) 3349 { 3350 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 3351 struct ibmvfc_host *vhost = shost_priv(shost); 3352 unsigned long flags = 0; 3353 3354 spin_lock_irqsave(shost->host_lock, flags); 3355 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 3356 spin_unlock_irqrestore(shost->host_lock, flags); 3357 return 0; 3358 } 3359 3360 /** 3361 * ibmvfc_slave_configure - Configure the device 3362 * @sdev: struct scsi_device device to configure 3363 * 3364 * Enable allow_restart for a device if it is a disk. Adjust the 3365 * queue_depth here also. 3366 * 3367 * Returns: 3368 * 0 3369 **/ 3370 static int ibmvfc_slave_configure(struct scsi_device *sdev) 3371 { 3372 struct Scsi_Host *shost = sdev->host; 3373 unsigned long flags = 0; 3374 3375 spin_lock_irqsave(shost->host_lock, flags); 3376 if (sdev->type == TYPE_DISK) { 3377 sdev->allow_restart = 1; 3378 blk_queue_rq_timeout(sdev->request_queue, 120 * HZ); 3379 } 3380 spin_unlock_irqrestore(shost->host_lock, flags); 3381 return 0; 3382 } 3383 3384 /** 3385 * ibmvfc_change_queue_depth - Change the device's queue depth 3386 * @sdev: scsi device struct 3387 * @qdepth: depth to set 3388 * 3389 * Return value: 3390 * actual depth set 3391 **/ 3392 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 3393 { 3394 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 3395 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 3396 3397 return scsi_change_queue_depth(sdev, qdepth); 3398 } 3399 3400 static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 3401 struct device_attribute *attr, char *buf) 3402 { 3403 struct Scsi_Host *shost = class_to_shost(dev); 3404 struct ibmvfc_host *vhost = shost_priv(shost); 3405 3406 return snprintf(buf, PAGE_SIZE, "%s\n", 3407 vhost->login_buf->resp.partition_name); 3408 } 3409 3410 static ssize_t ibmvfc_show_host_device_name(struct device *dev, 3411 struct device_attribute *attr, char *buf) 3412 { 3413 struct Scsi_Host *shost = class_to_shost(dev); 3414 struct ibmvfc_host *vhost = shost_priv(shost); 3415 3416 return snprintf(buf, PAGE_SIZE, "%s\n", 3417 vhost->login_buf->resp.device_name); 3418 } 3419 3420 static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 3421 struct device_attribute *attr, char *buf) 3422 { 3423 struct Scsi_Host *shost = class_to_shost(dev); 3424 struct ibmvfc_host *vhost = shost_priv(shost); 3425 3426 return snprintf(buf, PAGE_SIZE, "%s\n", 3427 vhost->login_buf->resp.port_loc_code); 3428 } 3429 3430 static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 3431 struct device_attribute *attr, char *buf) 3432 { 3433 struct Scsi_Host *shost = class_to_shost(dev); 3434 struct ibmvfc_host *vhost = shost_priv(shost); 3435 3436 return snprintf(buf, PAGE_SIZE, "%s\n", 3437 vhost->login_buf->resp.drc_name); 3438 } 3439 3440 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 3441 struct device_attribute *attr, char *buf) 3442 { 3443 struct Scsi_Host *shost = class_to_shost(dev); 3444 struct ibmvfc_host *vhost = shost_priv(shost); 3445 return snprintf(buf, PAGE_SIZE, "%d\n", be32_to_cpu(vhost->login_buf->resp.version)); 3446 } 3447 3448 static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 3449 struct device_attribute *attr, char *buf) 3450 { 3451 struct Scsi_Host *shost = class_to_shost(dev); 3452 struct ibmvfc_host *vhost = shost_priv(shost); 3453 return snprintf(buf, PAGE_SIZE, "%llx\n", be64_to_cpu(vhost->login_buf->resp.capabilities)); 3454 } 3455 3456 /** 3457 * ibmvfc_show_log_level - Show the adapter's error logging level 3458 * @dev: class device struct 3459 * @attr: unused 3460 * @buf: buffer 3461 * 3462 * Return value: 3463 * number of bytes printed to buffer 3464 **/ 3465 static ssize_t ibmvfc_show_log_level(struct device *dev, 3466 struct device_attribute *attr, char *buf) 3467 { 3468 struct Scsi_Host *shost = class_to_shost(dev); 3469 struct ibmvfc_host *vhost = shost_priv(shost); 3470 unsigned long flags = 0; 3471 int len; 3472 3473 spin_lock_irqsave(shost->host_lock, flags); 3474 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 3475 spin_unlock_irqrestore(shost->host_lock, flags); 3476 return len; 3477 } 3478 3479 /** 3480 * ibmvfc_store_log_level - Change the adapter's error logging level 3481 * @dev: class device struct 3482 * @attr: unused 3483 * @buf: buffer 3484 * @count: buffer size 3485 * 3486 * Return value: 3487 * number of bytes printed to buffer 3488 **/ 3489 static ssize_t ibmvfc_store_log_level(struct device *dev, 3490 struct device_attribute *attr, 3491 const char *buf, size_t count) 3492 { 3493 struct Scsi_Host *shost = class_to_shost(dev); 3494 struct ibmvfc_host *vhost = shost_priv(shost); 3495 unsigned long flags = 0; 3496 3497 spin_lock_irqsave(shost->host_lock, flags); 3498 vhost->log_level = simple_strtoul(buf, NULL, 10); 3499 spin_unlock_irqrestore(shost->host_lock, flags); 3500 return strlen(buf); 3501 } 3502 3503 static ssize_t ibmvfc_show_scsi_channels(struct device *dev, 3504 struct device_attribute *attr, char *buf) 3505 { 3506 struct Scsi_Host *shost = class_to_shost(dev); 3507 struct ibmvfc_host *vhost = shost_priv(shost); 3508 unsigned long flags = 0; 3509 int len; 3510 3511 spin_lock_irqsave(shost->host_lock, flags); 3512 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->client_scsi_channels); 3513 spin_unlock_irqrestore(shost->host_lock, flags); 3514 return len; 3515 } 3516 3517 static ssize_t ibmvfc_store_scsi_channels(struct device *dev, 3518 struct device_attribute *attr, 3519 const char *buf, size_t count) 3520 { 3521 struct Scsi_Host *shost = class_to_shost(dev); 3522 struct ibmvfc_host *vhost = shost_priv(shost); 3523 unsigned long flags = 0; 3524 unsigned int channels; 3525 3526 spin_lock_irqsave(shost->host_lock, flags); 3527 channels = simple_strtoul(buf, NULL, 10); 3528 vhost->client_scsi_channels = min(channels, nr_scsi_hw_queues); 3529 ibmvfc_hard_reset_host(vhost); 3530 spin_unlock_irqrestore(shost->host_lock, flags); 3531 return strlen(buf); 3532 } 3533 3534 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 3535 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 3536 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 3537 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 3538 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 3539 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 3540 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 3541 ibmvfc_show_log_level, ibmvfc_store_log_level); 3542 static DEVICE_ATTR(nr_scsi_channels, S_IRUGO | S_IWUSR, 3543 ibmvfc_show_scsi_channels, ibmvfc_store_scsi_channels); 3544 3545 #ifdef CONFIG_SCSI_IBMVFC_TRACE 3546 /** 3547 * ibmvfc_read_trace - Dump the adapter trace 3548 * @filp: open sysfs file 3549 * @kobj: kobject struct 3550 * @bin_attr: bin_attribute struct 3551 * @buf: buffer 3552 * @off: offset 3553 * @count: buffer size 3554 * 3555 * Return value: 3556 * number of bytes printed to buffer 3557 **/ 3558 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 3559 struct bin_attribute *bin_attr, 3560 char *buf, loff_t off, size_t count) 3561 { 3562 struct device *dev = kobj_to_dev(kobj); 3563 struct Scsi_Host *shost = class_to_shost(dev); 3564 struct ibmvfc_host *vhost = shost_priv(shost); 3565 unsigned long flags = 0; 3566 int size = IBMVFC_TRACE_SIZE; 3567 char *src = (char *)vhost->trace; 3568 3569 if (off > size) 3570 return 0; 3571 if (off + count > size) { 3572 size -= off; 3573 count = size; 3574 } 3575 3576 spin_lock_irqsave(shost->host_lock, flags); 3577 memcpy(buf, &src[off], count); 3578 spin_unlock_irqrestore(shost->host_lock, flags); 3579 return count; 3580 } 3581 3582 static struct bin_attribute ibmvfc_trace_attr = { 3583 .attr = { 3584 .name = "trace", 3585 .mode = S_IRUGO, 3586 }, 3587 .size = 0, 3588 .read = ibmvfc_read_trace, 3589 }; 3590 #endif 3591 3592 static struct device_attribute *ibmvfc_attrs[] = { 3593 &dev_attr_partition_name, 3594 &dev_attr_device_name, 3595 &dev_attr_port_loc_code, 3596 &dev_attr_drc_name, 3597 &dev_attr_npiv_version, 3598 &dev_attr_capabilities, 3599 &dev_attr_log_level, 3600 &dev_attr_nr_scsi_channels, 3601 NULL 3602 }; 3603 3604 static struct scsi_host_template driver_template = { 3605 .module = THIS_MODULE, 3606 .name = "IBM POWER Virtual FC Adapter", 3607 .proc_name = IBMVFC_NAME, 3608 .queuecommand = ibmvfc_queuecommand, 3609 .eh_timed_out = fc_eh_timed_out, 3610 .eh_abort_handler = ibmvfc_eh_abort_handler, 3611 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3612 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3613 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3614 .slave_alloc = ibmvfc_slave_alloc, 3615 .slave_configure = ibmvfc_slave_configure, 3616 .target_alloc = ibmvfc_target_alloc, 3617 .scan_finished = ibmvfc_scan_finished, 3618 .change_queue_depth = ibmvfc_change_queue_depth, 3619 .cmd_per_lun = 16, 3620 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3621 .this_id = -1, 3622 .sg_tablesize = SG_ALL, 3623 .max_sectors = IBMVFC_MAX_SECTORS, 3624 .shost_attrs = ibmvfc_attrs, 3625 .track_queue_depth = 1, 3626 .host_tagset = 1, 3627 }; 3628 3629 /** 3630 * ibmvfc_next_async_crq - Returns the next entry in async queue 3631 * @vhost: ibmvfc host struct 3632 * 3633 * Returns: 3634 * Pointer to next entry in queue / NULL if empty 3635 **/ 3636 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3637 { 3638 struct ibmvfc_queue *async_crq = &vhost->async_crq; 3639 struct ibmvfc_async_crq *crq; 3640 3641 crq = &async_crq->msgs.async[async_crq->cur]; 3642 if (crq->valid & 0x80) { 3643 if (++async_crq->cur == async_crq->size) 3644 async_crq->cur = 0; 3645 rmb(); 3646 } else 3647 crq = NULL; 3648 3649 return crq; 3650 } 3651 3652 /** 3653 * ibmvfc_next_crq - Returns the next entry in message queue 3654 * @vhost: ibmvfc host struct 3655 * 3656 * Returns: 3657 * Pointer to next entry in queue / NULL if empty 3658 **/ 3659 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3660 { 3661 struct ibmvfc_queue *queue = &vhost->crq; 3662 struct ibmvfc_crq *crq; 3663 3664 crq = &queue->msgs.crq[queue->cur]; 3665 if (crq->valid & 0x80) { 3666 if (++queue->cur == queue->size) 3667 queue->cur = 0; 3668 rmb(); 3669 } else 3670 crq = NULL; 3671 3672 return crq; 3673 } 3674 3675 /** 3676 * ibmvfc_interrupt - Interrupt handler 3677 * @irq: number of irq to handle, not used 3678 * @dev_instance: ibmvfc_host that received interrupt 3679 * 3680 * Returns: 3681 * IRQ_HANDLED 3682 **/ 3683 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3684 { 3685 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3686 unsigned long flags; 3687 3688 spin_lock_irqsave(vhost->host->host_lock, flags); 3689 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3690 tasklet_schedule(&vhost->tasklet); 3691 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3692 return IRQ_HANDLED; 3693 } 3694 3695 /** 3696 * ibmvfc_tasklet - Interrupt handler tasklet 3697 * @data: ibmvfc host struct 3698 * 3699 * Returns: 3700 * Nothing 3701 **/ 3702 static void ibmvfc_tasklet(void *data) 3703 { 3704 struct ibmvfc_host *vhost = data; 3705 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3706 struct ibmvfc_crq *crq; 3707 struct ibmvfc_async_crq *async; 3708 struct ibmvfc_event *evt, *temp; 3709 unsigned long flags; 3710 int done = 0; 3711 LIST_HEAD(evt_doneq); 3712 3713 spin_lock_irqsave(vhost->host->host_lock, flags); 3714 spin_lock(vhost->crq.q_lock); 3715 while (!done) { 3716 /* Pull all the valid messages off the async CRQ */ 3717 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3718 ibmvfc_handle_async(async, vhost); 3719 async->valid = 0; 3720 wmb(); 3721 } 3722 3723 /* Pull all the valid messages off the CRQ */ 3724 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3725 ibmvfc_handle_crq(crq, vhost, &evt_doneq); 3726 crq->valid = 0; 3727 wmb(); 3728 } 3729 3730 vio_enable_interrupts(vdev); 3731 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3732 vio_disable_interrupts(vdev); 3733 ibmvfc_handle_async(async, vhost); 3734 async->valid = 0; 3735 wmb(); 3736 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3737 vio_disable_interrupts(vdev); 3738 ibmvfc_handle_crq(crq, vhost, &evt_doneq); 3739 crq->valid = 0; 3740 wmb(); 3741 } else 3742 done = 1; 3743 } 3744 3745 spin_unlock(vhost->crq.q_lock); 3746 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3747 3748 list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) { 3749 del_timer(&evt->timer); 3750 list_del(&evt->queue_list); 3751 ibmvfc_trc_end(evt); 3752 evt->done(evt); 3753 } 3754 } 3755 3756 static int ibmvfc_toggle_scrq_irq(struct ibmvfc_queue *scrq, int enable) 3757 { 3758 struct device *dev = scrq->vhost->dev; 3759 struct vio_dev *vdev = to_vio_dev(dev); 3760 unsigned long rc; 3761 int irq_action = H_ENABLE_VIO_INTERRUPT; 3762 3763 if (!enable) 3764 irq_action = H_DISABLE_VIO_INTERRUPT; 3765 3766 rc = plpar_hcall_norets(H_VIOCTL, vdev->unit_address, irq_action, 3767 scrq->hw_irq, 0, 0); 3768 3769 if (rc) 3770 dev_err(dev, "Couldn't %s sub-crq[%lu] irq. rc=%ld\n", 3771 enable ? "enable" : "disable", scrq->hwq_id, rc); 3772 3773 return rc; 3774 } 3775 3776 static void ibmvfc_handle_scrq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost, 3777 struct list_head *evt_doneq) 3778 { 3779 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 3780 3781 switch (crq->valid) { 3782 case IBMVFC_CRQ_CMD_RSP: 3783 break; 3784 case IBMVFC_CRQ_XPORT_EVENT: 3785 return; 3786 default: 3787 dev_err(vhost->dev, "Got and invalid message type 0x%02x\n", crq->valid); 3788 return; 3789 } 3790 3791 /* The only kind of payload CRQs we should get are responses to 3792 * things we send. Make sure this response is to something we 3793 * actually sent 3794 */ 3795 if (unlikely(!ibmvfc_valid_event(&evt->queue->evt_pool, evt))) { 3796 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 3797 crq->ioba); 3798 return; 3799 } 3800 3801 if (unlikely(atomic_dec_if_positive(&evt->active))) { 3802 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 3803 crq->ioba); 3804 return; 3805 } 3806 3807 spin_lock(&evt->queue->l_lock); 3808 list_move_tail(&evt->queue_list, evt_doneq); 3809 spin_unlock(&evt->queue->l_lock); 3810 } 3811 3812 static struct ibmvfc_crq *ibmvfc_next_scrq(struct ibmvfc_queue *scrq) 3813 { 3814 struct ibmvfc_crq *crq; 3815 3816 crq = &scrq->msgs.scrq[scrq->cur].crq; 3817 if (crq->valid & 0x80) { 3818 if (++scrq->cur == scrq->size) 3819 scrq->cur = 0; 3820 rmb(); 3821 } else 3822 crq = NULL; 3823 3824 return crq; 3825 } 3826 3827 static void ibmvfc_drain_sub_crq(struct ibmvfc_queue *scrq) 3828 { 3829 struct ibmvfc_crq *crq; 3830 struct ibmvfc_event *evt, *temp; 3831 unsigned long flags; 3832 int done = 0; 3833 LIST_HEAD(evt_doneq); 3834 3835 spin_lock_irqsave(scrq->q_lock, flags); 3836 while (!done) { 3837 while ((crq = ibmvfc_next_scrq(scrq)) != NULL) { 3838 ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq); 3839 crq->valid = 0; 3840 wmb(); 3841 } 3842 3843 ibmvfc_toggle_scrq_irq(scrq, 1); 3844 if ((crq = ibmvfc_next_scrq(scrq)) != NULL) { 3845 ibmvfc_toggle_scrq_irq(scrq, 0); 3846 ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq); 3847 crq->valid = 0; 3848 wmb(); 3849 } else 3850 done = 1; 3851 } 3852 spin_unlock_irqrestore(scrq->q_lock, flags); 3853 3854 list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) { 3855 del_timer(&evt->timer); 3856 list_del(&evt->queue_list); 3857 ibmvfc_trc_end(evt); 3858 evt->done(evt); 3859 } 3860 } 3861 3862 static irqreturn_t ibmvfc_interrupt_scsi(int irq, void *scrq_instance) 3863 { 3864 struct ibmvfc_queue *scrq = (struct ibmvfc_queue *)scrq_instance; 3865 3866 ibmvfc_toggle_scrq_irq(scrq, 0); 3867 ibmvfc_drain_sub_crq(scrq); 3868 3869 return IRQ_HANDLED; 3870 } 3871 3872 /** 3873 * ibmvfc_init_tgt - Set the next init job step for the target 3874 * @tgt: ibmvfc target struct 3875 * @job_step: job step to perform 3876 * 3877 **/ 3878 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3879 void (*job_step) (struct ibmvfc_target *)) 3880 { 3881 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT)) 3882 tgt->job_step = job_step; 3883 wake_up(&tgt->vhost->work_wait_q); 3884 } 3885 3886 /** 3887 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3888 * @tgt: ibmvfc target struct 3889 * @job_step: initialization job step 3890 * 3891 * Returns: 1 if step will be retried / 0 if not 3892 * 3893 **/ 3894 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3895 void (*job_step) (struct ibmvfc_target *)) 3896 { 3897 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3898 ibmvfc_del_tgt(tgt); 3899 wake_up(&tgt->vhost->work_wait_q); 3900 return 0; 3901 } else 3902 ibmvfc_init_tgt(tgt, job_step); 3903 return 1; 3904 } 3905 3906 /* Defined in FC-LS */ 3907 static const struct { 3908 int code; 3909 int retry; 3910 int logged_in; 3911 } prli_rsp [] = { 3912 { 0, 1, 0 }, 3913 { 1, 0, 1 }, 3914 { 2, 1, 0 }, 3915 { 3, 1, 0 }, 3916 { 4, 0, 0 }, 3917 { 5, 0, 0 }, 3918 { 6, 0, 1 }, 3919 { 7, 0, 0 }, 3920 { 8, 1, 0 }, 3921 }; 3922 3923 /** 3924 * ibmvfc_get_prli_rsp - Find PRLI response index 3925 * @flags: PRLI response flags 3926 * 3927 **/ 3928 static int ibmvfc_get_prli_rsp(u16 flags) 3929 { 3930 int i; 3931 int code = (flags & 0x0f00) >> 8; 3932 3933 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 3934 if (prli_rsp[i].code == code) 3935 return i; 3936 3937 return 0; 3938 } 3939 3940 /** 3941 * ibmvfc_tgt_prli_done - Completion handler for Process Login 3942 * @evt: ibmvfc event struct 3943 * 3944 **/ 3945 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 3946 { 3947 struct ibmvfc_target *tgt = evt->tgt; 3948 struct ibmvfc_host *vhost = evt->vhost; 3949 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 3950 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 3951 u32 status = be16_to_cpu(rsp->common.status); 3952 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 3953 3954 vhost->discovery_threads--; 3955 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3956 switch (status) { 3957 case IBMVFC_MAD_SUCCESS: 3958 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 3959 parms->type, parms->flags, parms->service_parms); 3960 3961 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 3962 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); 3963 if (prli_rsp[index].logged_in) { 3964 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { 3965 tgt->need_login = 0; 3966 tgt->ids.roles = 0; 3967 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) 3968 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 3969 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) 3970 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 3971 tgt->add_rport = 1; 3972 } else 3973 ibmvfc_del_tgt(tgt); 3974 } else if (prli_rsp[index].retry) 3975 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3976 else 3977 ibmvfc_del_tgt(tgt); 3978 } else 3979 ibmvfc_del_tgt(tgt); 3980 break; 3981 case IBMVFC_MAD_DRIVER_FAILED: 3982 break; 3983 case IBMVFC_MAD_CRQ_ERROR: 3984 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3985 break; 3986 case IBMVFC_MAD_FAILED: 3987 default: 3988 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && 3989 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) 3990 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3991 else if (tgt->logo_rcvd) 3992 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 3993 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 3994 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 3995 else 3996 ibmvfc_del_tgt(tgt); 3997 3998 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 3999 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4000 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), status); 4001 break; 4002 } 4003 4004 kref_put(&tgt->kref, ibmvfc_release_tgt); 4005 ibmvfc_free_event(evt); 4006 wake_up(&vhost->work_wait_q); 4007 } 4008 4009 /** 4010 * ibmvfc_tgt_send_prli - Send a process login 4011 * @tgt: ibmvfc target struct 4012 * 4013 **/ 4014 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 4015 { 4016 struct ibmvfc_process_login *prli; 4017 struct ibmvfc_host *vhost = tgt->vhost; 4018 struct ibmvfc_event *evt; 4019 4020 if (vhost->discovery_threads >= disc_threads) 4021 return; 4022 4023 kref_get(&tgt->kref); 4024 evt = ibmvfc_get_event(&vhost->crq); 4025 vhost->discovery_threads++; 4026 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 4027 evt->tgt = tgt; 4028 prli = &evt->iu.prli; 4029 memset(prli, 0, sizeof(*prli)); 4030 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 4031 prli->common.version = cpu_to_be32(2); 4032 prli->target_wwpn = cpu_to_be64(tgt->wwpn); 4033 } else { 4034 prli->common.version = cpu_to_be32(1); 4035 } 4036 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); 4037 prli->common.length = cpu_to_be16(sizeof(*prli)); 4038 prli->scsi_id = cpu_to_be64(tgt->scsi_id); 4039 4040 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 4041 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); 4042 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); 4043 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED); 4044 4045 if (cls3_error) 4046 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY); 4047 4048 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4049 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4050 vhost->discovery_threads--; 4051 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4052 kref_put(&tgt->kref, ibmvfc_release_tgt); 4053 } else 4054 tgt_dbg(tgt, "Sent process login\n"); 4055 } 4056 4057 /** 4058 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 4059 * @evt: ibmvfc event struct 4060 * 4061 **/ 4062 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 4063 { 4064 struct ibmvfc_target *tgt = evt->tgt; 4065 struct ibmvfc_host *vhost = evt->vhost; 4066 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 4067 u32 status = be16_to_cpu(rsp->common.status); 4068 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4069 4070 vhost->discovery_threads--; 4071 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4072 switch (status) { 4073 case IBMVFC_MAD_SUCCESS: 4074 tgt_dbg(tgt, "Port Login succeeded\n"); 4075 if (tgt->ids.port_name && 4076 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 4077 vhost->reinit = 1; 4078 tgt_dbg(tgt, "Port re-init required\n"); 4079 break; 4080 } 4081 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 4082 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 4083 tgt->ids.port_id = tgt->scsi_id; 4084 memcpy(&tgt->service_parms, &rsp->service_parms, 4085 sizeof(tgt->service_parms)); 4086 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 4087 sizeof(tgt->service_parms_change)); 4088 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 4089 break; 4090 case IBMVFC_MAD_DRIVER_FAILED: 4091 break; 4092 case IBMVFC_MAD_CRQ_ERROR: 4093 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 4094 break; 4095 case IBMVFC_MAD_FAILED: 4096 default: 4097 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4098 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 4099 else 4100 ibmvfc_del_tgt(tgt); 4101 4102 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 4103 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4104 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), 4105 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), 4106 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status); 4107 break; 4108 } 4109 4110 kref_put(&tgt->kref, ibmvfc_release_tgt); 4111 ibmvfc_free_event(evt); 4112 wake_up(&vhost->work_wait_q); 4113 } 4114 4115 /** 4116 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 4117 * @tgt: ibmvfc target struct 4118 * 4119 **/ 4120 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 4121 { 4122 struct ibmvfc_port_login *plogi; 4123 struct ibmvfc_host *vhost = tgt->vhost; 4124 struct ibmvfc_event *evt; 4125 4126 if (vhost->discovery_threads >= disc_threads) 4127 return; 4128 4129 kref_get(&tgt->kref); 4130 tgt->logo_rcvd = 0; 4131 evt = ibmvfc_get_event(&vhost->crq); 4132 vhost->discovery_threads++; 4133 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4134 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 4135 evt->tgt = tgt; 4136 plogi = &evt->iu.plogi; 4137 memset(plogi, 0, sizeof(*plogi)); 4138 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 4139 plogi->common.version = cpu_to_be32(2); 4140 plogi->target_wwpn = cpu_to_be64(tgt->wwpn); 4141 } else { 4142 plogi->common.version = cpu_to_be32(1); 4143 } 4144 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 4145 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 4146 plogi->scsi_id = cpu_to_be64(tgt->scsi_id); 4147 4148 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4149 vhost->discovery_threads--; 4150 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4151 kref_put(&tgt->kref, ibmvfc_release_tgt); 4152 } else 4153 tgt_dbg(tgt, "Sent port login\n"); 4154 } 4155 4156 /** 4157 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 4158 * @evt: ibmvfc event struct 4159 * 4160 **/ 4161 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 4162 { 4163 struct ibmvfc_target *tgt = evt->tgt; 4164 struct ibmvfc_host *vhost = evt->vhost; 4165 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 4166 u32 status = be16_to_cpu(rsp->common.status); 4167 4168 vhost->discovery_threads--; 4169 ibmvfc_free_event(evt); 4170 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4171 4172 switch (status) { 4173 case IBMVFC_MAD_SUCCESS: 4174 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 4175 break; 4176 case IBMVFC_MAD_DRIVER_FAILED: 4177 kref_put(&tgt->kref, ibmvfc_release_tgt); 4178 wake_up(&vhost->work_wait_q); 4179 return; 4180 case IBMVFC_MAD_FAILED: 4181 default: 4182 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 4183 break; 4184 } 4185 4186 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 4187 kref_put(&tgt->kref, ibmvfc_release_tgt); 4188 wake_up(&vhost->work_wait_q); 4189 } 4190 4191 /** 4192 * __ibmvfc_tgt_get_implicit_logout_evt - Allocate and init an event for implicit logout 4193 * @tgt: ibmvfc target struct 4194 * @done: Routine to call when the event is responded to 4195 * 4196 * Returns: 4197 * Allocated and initialized ibmvfc_event struct 4198 **/ 4199 static struct ibmvfc_event *__ibmvfc_tgt_get_implicit_logout_evt(struct ibmvfc_target *tgt, 4200 void (*done) (struct ibmvfc_event *)) 4201 { 4202 struct ibmvfc_implicit_logout *mad; 4203 struct ibmvfc_host *vhost = tgt->vhost; 4204 struct ibmvfc_event *evt; 4205 4206 kref_get(&tgt->kref); 4207 evt = ibmvfc_get_event(&vhost->crq); 4208 ibmvfc_init_event(evt, done, IBMVFC_MAD_FORMAT); 4209 evt->tgt = tgt; 4210 mad = &evt->iu.implicit_logout; 4211 memset(mad, 0, sizeof(*mad)); 4212 mad->common.version = cpu_to_be32(1); 4213 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); 4214 mad->common.length = cpu_to_be16(sizeof(*mad)); 4215 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); 4216 return evt; 4217 } 4218 4219 /** 4220 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 4221 * @tgt: ibmvfc target struct 4222 * 4223 **/ 4224 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 4225 { 4226 struct ibmvfc_host *vhost = tgt->vhost; 4227 struct ibmvfc_event *evt; 4228 4229 if (vhost->discovery_threads >= disc_threads) 4230 return; 4231 4232 vhost->discovery_threads++; 4233 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, 4234 ibmvfc_tgt_implicit_logout_done); 4235 4236 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4237 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4238 vhost->discovery_threads--; 4239 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4240 kref_put(&tgt->kref, ibmvfc_release_tgt); 4241 } else 4242 tgt_dbg(tgt, "Sent Implicit Logout\n"); 4243 } 4244 4245 /** 4246 * ibmvfc_tgt_implicit_logout_and_del_done - Completion handler for Implicit Logout MAD 4247 * @evt: ibmvfc event struct 4248 * 4249 **/ 4250 static void ibmvfc_tgt_implicit_logout_and_del_done(struct ibmvfc_event *evt) 4251 { 4252 struct ibmvfc_target *tgt = evt->tgt; 4253 struct ibmvfc_host *vhost = evt->vhost; 4254 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 4255 u32 status = be16_to_cpu(mad->common.status); 4256 4257 vhost->discovery_threads--; 4258 ibmvfc_free_event(evt); 4259 4260 /* 4261 * If our state is IBMVFC_HOST_OFFLINE, we could be unloading the 4262 * driver in which case we need to free up all the targets. If we are 4263 * not unloading, we will still go through a hard reset to get out of 4264 * offline state, so there is no need to track the old targets in that 4265 * case. 4266 */ 4267 if (status == IBMVFC_MAD_SUCCESS || vhost->state == IBMVFC_HOST_OFFLINE) 4268 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4269 else 4270 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT); 4271 4272 tgt_dbg(tgt, "Implicit Logout %s\n", (status == IBMVFC_MAD_SUCCESS) ? "succeeded" : "failed"); 4273 kref_put(&tgt->kref, ibmvfc_release_tgt); 4274 wake_up(&vhost->work_wait_q); 4275 } 4276 4277 /** 4278 * ibmvfc_tgt_implicit_logout_and_del - Initiate an Implicit Logout for specified target 4279 * @tgt: ibmvfc target struct 4280 * 4281 **/ 4282 static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *tgt) 4283 { 4284 struct ibmvfc_host *vhost = tgt->vhost; 4285 struct ibmvfc_event *evt; 4286 4287 if (!vhost->logged_in) { 4288 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4289 return; 4290 } 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_and_del_done); 4298 4299 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT); 4300 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4301 vhost->discovery_threads--; 4302 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4303 kref_put(&tgt->kref, ibmvfc_release_tgt); 4304 } else 4305 tgt_dbg(tgt, "Sent Implicit Logout\n"); 4306 } 4307 4308 /** 4309 * ibmvfc_tgt_move_login_done - Completion handler for Move Login 4310 * @evt: ibmvfc event struct 4311 * 4312 **/ 4313 static void ibmvfc_tgt_move_login_done(struct ibmvfc_event *evt) 4314 { 4315 struct ibmvfc_target *tgt = evt->tgt; 4316 struct ibmvfc_host *vhost = evt->vhost; 4317 struct ibmvfc_move_login *rsp = &evt->xfer_iu->move_login; 4318 u32 status = be16_to_cpu(rsp->common.status); 4319 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4320 4321 vhost->discovery_threads--; 4322 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4323 switch (status) { 4324 case IBMVFC_MAD_SUCCESS: 4325 tgt_dbg(tgt, "Move Login succeeded for new scsi_id: %llX\n", tgt->new_scsi_id); 4326 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 4327 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 4328 tgt->scsi_id = tgt->new_scsi_id; 4329 tgt->ids.port_id = tgt->scsi_id; 4330 memcpy(&tgt->service_parms, &rsp->service_parms, 4331 sizeof(tgt->service_parms)); 4332 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 4333 sizeof(tgt->service_parms_change)); 4334 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 4335 break; 4336 case IBMVFC_MAD_DRIVER_FAILED: 4337 break; 4338 case IBMVFC_MAD_CRQ_ERROR: 4339 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); 4340 break; 4341 case IBMVFC_MAD_FAILED: 4342 default: 4343 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); 4344 4345 tgt_log(tgt, level, 4346 "Move Login failed: new scsi_id: %llX, flags:%x, vios_flags:%x, rc=0x%02X\n", 4347 tgt->new_scsi_id, be32_to_cpu(rsp->flags), be16_to_cpu(rsp->vios_flags), 4348 status); 4349 break; 4350 } 4351 4352 kref_put(&tgt->kref, ibmvfc_release_tgt); 4353 ibmvfc_free_event(evt); 4354 wake_up(&vhost->work_wait_q); 4355 } 4356 4357 4358 /** 4359 * ibmvfc_tgt_move_login - Initiate a move login for specified target 4360 * @tgt: ibmvfc target struct 4361 * 4362 **/ 4363 static void ibmvfc_tgt_move_login(struct ibmvfc_target *tgt) 4364 { 4365 struct ibmvfc_host *vhost = tgt->vhost; 4366 struct ibmvfc_move_login *move; 4367 struct ibmvfc_event *evt; 4368 4369 if (vhost->discovery_threads >= disc_threads) 4370 return; 4371 4372 kref_get(&tgt->kref); 4373 evt = ibmvfc_get_event(&vhost->crq); 4374 vhost->discovery_threads++; 4375 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4376 ibmvfc_init_event(evt, ibmvfc_tgt_move_login_done, IBMVFC_MAD_FORMAT); 4377 evt->tgt = tgt; 4378 move = &evt->iu.move_login; 4379 memset(move, 0, sizeof(*move)); 4380 move->common.version = cpu_to_be32(1); 4381 move->common.opcode = cpu_to_be32(IBMVFC_MOVE_LOGIN); 4382 move->common.length = cpu_to_be16(sizeof(*move)); 4383 4384 move->old_scsi_id = cpu_to_be64(tgt->scsi_id); 4385 move->new_scsi_id = cpu_to_be64(tgt->new_scsi_id); 4386 move->wwpn = cpu_to_be64(tgt->wwpn); 4387 move->node_name = cpu_to_be64(tgt->ids.node_name); 4388 4389 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4390 vhost->discovery_threads--; 4391 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4392 kref_put(&tgt->kref, ibmvfc_release_tgt); 4393 } else 4394 tgt_dbg(tgt, "Sent Move Login for new scsi_id: %llX\n", tgt->new_scsi_id); 4395 } 4396 4397 /** 4398 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 4399 * @mad: ibmvfc passthru mad struct 4400 * @tgt: ibmvfc target struct 4401 * 4402 * Returns: 4403 * 1 if PLOGI needed / 0 if PLOGI not needed 4404 **/ 4405 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 4406 struct ibmvfc_target *tgt) 4407 { 4408 if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name) 4409 return 1; 4410 if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name) 4411 return 1; 4412 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) 4413 return 1; 4414 return 0; 4415 } 4416 4417 /** 4418 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 4419 * @evt: ibmvfc event struct 4420 * 4421 **/ 4422 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 4423 { 4424 struct ibmvfc_target *tgt = evt->tgt; 4425 struct ibmvfc_host *vhost = evt->vhost; 4426 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 4427 u32 status = be16_to_cpu(mad->common.status); 4428 u8 fc_reason, fc_explain; 4429 4430 vhost->discovery_threads--; 4431 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4432 del_timer(&tgt->timer); 4433 4434 switch (status) { 4435 case IBMVFC_MAD_SUCCESS: 4436 tgt_dbg(tgt, "ADISC succeeded\n"); 4437 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 4438 ibmvfc_del_tgt(tgt); 4439 break; 4440 case IBMVFC_MAD_DRIVER_FAILED: 4441 break; 4442 case IBMVFC_MAD_FAILED: 4443 default: 4444 ibmvfc_del_tgt(tgt); 4445 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; 4446 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; 4447 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 4448 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), 4449 be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error), 4450 ibmvfc_get_fc_type(fc_reason), fc_reason, 4451 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 4452 break; 4453 } 4454 4455 kref_put(&tgt->kref, ibmvfc_release_tgt); 4456 ibmvfc_free_event(evt); 4457 wake_up(&vhost->work_wait_q); 4458 } 4459 4460 /** 4461 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 4462 * @evt: ibmvfc event struct 4463 * 4464 **/ 4465 static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 4466 { 4467 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 4468 4469 memset(mad, 0, sizeof(*mad)); 4470 mad->common.version = cpu_to_be32(1); 4471 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 4472 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 4473 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 4474 offsetof(struct ibmvfc_passthru_mad, iu)); 4475 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 4476 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 4477 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); 4478 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 4479 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 4480 offsetof(struct ibmvfc_passthru_fc_iu, payload)); 4481 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 4482 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 4483 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 4484 offsetof(struct ibmvfc_passthru_fc_iu, response)); 4485 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); 4486 } 4487 4488 /** 4489 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 4490 * @evt: ibmvfc event struct 4491 * 4492 * Just cleanup this event struct. Everything else is handled by 4493 * the ADISC completion handler. If the ADISC never actually comes 4494 * back, we still have the timer running on the ADISC event struct 4495 * which will fire and cause the CRQ to get reset. 4496 * 4497 **/ 4498 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 4499 { 4500 struct ibmvfc_host *vhost = evt->vhost; 4501 struct ibmvfc_target *tgt = evt->tgt; 4502 4503 tgt_dbg(tgt, "ADISC cancel complete\n"); 4504 vhost->abort_threads--; 4505 ibmvfc_free_event(evt); 4506 kref_put(&tgt->kref, ibmvfc_release_tgt); 4507 wake_up(&vhost->work_wait_q); 4508 } 4509 4510 /** 4511 * ibmvfc_adisc_timeout - Handle an ADISC timeout 4512 * @t: ibmvfc target struct 4513 * 4514 * If an ADISC times out, send a cancel. If the cancel times 4515 * out, reset the CRQ. When the ADISC comes back as cancelled, 4516 * log back into the target. 4517 **/ 4518 static void ibmvfc_adisc_timeout(struct timer_list *t) 4519 { 4520 struct ibmvfc_target *tgt = from_timer(tgt, t, timer); 4521 struct ibmvfc_host *vhost = tgt->vhost; 4522 struct ibmvfc_event *evt; 4523 struct ibmvfc_tmf *tmf; 4524 unsigned long flags; 4525 int rc; 4526 4527 tgt_dbg(tgt, "ADISC timeout\n"); 4528 spin_lock_irqsave(vhost->host->host_lock, flags); 4529 if (vhost->abort_threads >= disc_threads || 4530 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 4531 vhost->state != IBMVFC_INITIALIZING || 4532 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 4533 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4534 return; 4535 } 4536 4537 vhost->abort_threads++; 4538 kref_get(&tgt->kref); 4539 evt = ibmvfc_get_event(&vhost->crq); 4540 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 4541 4542 evt->tgt = tgt; 4543 tmf = &evt->iu.tmf; 4544 memset(tmf, 0, sizeof(*tmf)); 4545 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 4546 tmf->common.version = cpu_to_be32(2); 4547 tmf->target_wwpn = cpu_to_be64(tgt->wwpn); 4548 } else { 4549 tmf->common.version = cpu_to_be32(1); 4550 } 4551 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 4552 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 4553 tmf->scsi_id = cpu_to_be64(tgt->scsi_id); 4554 tmf->cancel_key = cpu_to_be32(tgt->cancel_key); 4555 4556 rc = ibmvfc_send_event(evt, vhost, default_timeout); 4557 4558 if (rc) { 4559 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 4560 vhost->abort_threads--; 4561 kref_put(&tgt->kref, ibmvfc_release_tgt); 4562 __ibmvfc_reset_host(vhost); 4563 } else 4564 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 4565 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4566 } 4567 4568 /** 4569 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 4570 * @tgt: ibmvfc target struct 4571 * 4572 * When sending an ADISC we end up with two timers running. The 4573 * first timer is the timer in the ibmvfc target struct. If this 4574 * fires, we send a cancel to the target. The second timer is the 4575 * timer on the ibmvfc event for the ADISC, which is longer. If that 4576 * fires, it means the ADISC timed out and our attempt to cancel it 4577 * also failed, so we need to reset the CRQ. 4578 **/ 4579 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 4580 { 4581 struct ibmvfc_passthru_mad *mad; 4582 struct ibmvfc_host *vhost = tgt->vhost; 4583 struct ibmvfc_event *evt; 4584 4585 if (vhost->discovery_threads >= disc_threads) 4586 return; 4587 4588 kref_get(&tgt->kref); 4589 evt = ibmvfc_get_event(&vhost->crq); 4590 vhost->discovery_threads++; 4591 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 4592 evt->tgt = tgt; 4593 4594 ibmvfc_init_passthru(evt); 4595 mad = &evt->iu.passthru; 4596 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); 4597 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); 4598 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); 4599 4600 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); 4601 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 4602 sizeof(vhost->login_buf->resp.port_name)); 4603 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 4604 sizeof(vhost->login_buf->resp.node_name)); 4605 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); 4606 4607 if (timer_pending(&tgt->timer)) 4608 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 4609 else { 4610 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 4611 add_timer(&tgt->timer); 4612 } 4613 4614 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4615 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 4616 vhost->discovery_threads--; 4617 del_timer(&tgt->timer); 4618 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4619 kref_put(&tgt->kref, ibmvfc_release_tgt); 4620 } else 4621 tgt_dbg(tgt, "Sent ADISC\n"); 4622 } 4623 4624 /** 4625 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 4626 * @evt: ibmvfc event struct 4627 * 4628 **/ 4629 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 4630 { 4631 struct ibmvfc_target *tgt = evt->tgt; 4632 struct ibmvfc_host *vhost = evt->vhost; 4633 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 4634 u32 status = be16_to_cpu(rsp->common.status); 4635 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4636 4637 vhost->discovery_threads--; 4638 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4639 switch (status) { 4640 case IBMVFC_MAD_SUCCESS: 4641 tgt_dbg(tgt, "Query Target succeeded\n"); 4642 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) 4643 ibmvfc_del_tgt(tgt); 4644 else 4645 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 4646 break; 4647 case IBMVFC_MAD_DRIVER_FAILED: 4648 break; 4649 case IBMVFC_MAD_CRQ_ERROR: 4650 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 4651 break; 4652 case IBMVFC_MAD_FAILED: 4653 default: 4654 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 4655 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && 4656 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) 4657 ibmvfc_del_tgt(tgt); 4658 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4659 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 4660 else 4661 ibmvfc_del_tgt(tgt); 4662 4663 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 4664 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4665 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), 4666 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), 4667 ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), 4668 status); 4669 break; 4670 } 4671 4672 kref_put(&tgt->kref, ibmvfc_release_tgt); 4673 ibmvfc_free_event(evt); 4674 wake_up(&vhost->work_wait_q); 4675 } 4676 4677 /** 4678 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 4679 * @tgt: ibmvfc target struct 4680 * 4681 **/ 4682 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 4683 { 4684 struct ibmvfc_query_tgt *query_tgt; 4685 struct ibmvfc_host *vhost = tgt->vhost; 4686 struct ibmvfc_event *evt; 4687 4688 if (vhost->discovery_threads >= disc_threads) 4689 return; 4690 4691 kref_get(&tgt->kref); 4692 evt = ibmvfc_get_event(&vhost->crq); 4693 vhost->discovery_threads++; 4694 evt->tgt = tgt; 4695 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 4696 query_tgt = &evt->iu.query_tgt; 4697 memset(query_tgt, 0, sizeof(*query_tgt)); 4698 query_tgt->common.version = cpu_to_be32(1); 4699 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); 4700 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); 4701 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); 4702 4703 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4704 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4705 vhost->discovery_threads--; 4706 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4707 kref_put(&tgt->kref, ibmvfc_release_tgt); 4708 } else 4709 tgt_dbg(tgt, "Sent Query Target\n"); 4710 } 4711 4712 /** 4713 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 4714 * @vhost: ibmvfc host struct 4715 * @target: Holds SCSI ID to allocate target forand the WWPN 4716 * 4717 * Returns: 4718 * 0 on success / other on failure 4719 **/ 4720 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, 4721 struct ibmvfc_discover_targets_entry *target) 4722 { 4723 struct ibmvfc_target *stgt = NULL; 4724 struct ibmvfc_target *wtgt = NULL; 4725 struct ibmvfc_target *tgt; 4726 unsigned long flags; 4727 u64 scsi_id = be32_to_cpu(target->scsi_id) & IBMVFC_DISC_TGT_SCSI_ID_MASK; 4728 u64 wwpn = be64_to_cpu(target->wwpn); 4729 4730 /* Look to see if we already have a target allocated for this SCSI ID or WWPN */ 4731 spin_lock_irqsave(vhost->host->host_lock, flags); 4732 list_for_each_entry(tgt, &vhost->targets, queue) { 4733 if (tgt->wwpn == wwpn) { 4734 wtgt = tgt; 4735 break; 4736 } 4737 } 4738 4739 list_for_each_entry(tgt, &vhost->targets, queue) { 4740 if (tgt->scsi_id == scsi_id) { 4741 stgt = tgt; 4742 break; 4743 } 4744 } 4745 4746 if (wtgt && !stgt) { 4747 /* 4748 * A WWPN target has moved and we still are tracking the old 4749 * SCSI ID. The only way we should be able to get here is if 4750 * we attempted to send an implicit logout for the old SCSI ID 4751 * and it failed for some reason, such as there being I/O 4752 * pending to the target. In this case, we will have already 4753 * deleted the rport from the FC transport so we do a move 4754 * login, which works even with I/O pending, however, if 4755 * there is still I/O pending, it will stay outstanding, so 4756 * we only do this if fast fail is disabled for the rport, 4757 * otherwise we let terminate_rport_io clean up the port 4758 * before we login at the new location. 4759 */ 4760 if (wtgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 4761 if (wtgt->move_login) { 4762 /* 4763 * Do a move login here. The old target is no longer 4764 * known to the transport layer We don't use the 4765 * normal ibmvfc_set_tgt_action to set this, as we 4766 * don't normally want to allow this state change. 4767 */ 4768 wtgt->new_scsi_id = scsi_id; 4769 wtgt->action = IBMVFC_TGT_ACTION_INIT; 4770 wtgt->init_retries = 0; 4771 ibmvfc_init_tgt(wtgt, ibmvfc_tgt_move_login); 4772 } 4773 goto unlock_out; 4774 } else { 4775 tgt_err(wtgt, "Unexpected target state: %d, %p\n", 4776 wtgt->action, wtgt->rport); 4777 } 4778 } else if (stgt) { 4779 if (tgt->need_login) 4780 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 4781 goto unlock_out; 4782 } 4783 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4784 4785 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 4786 memset(tgt, 0, sizeof(*tgt)); 4787 tgt->scsi_id = scsi_id; 4788 tgt->wwpn = wwpn; 4789 tgt->vhost = vhost; 4790 tgt->need_login = 1; 4791 timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0); 4792 kref_init(&tgt->kref); 4793 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 4794 spin_lock_irqsave(vhost->host->host_lock, flags); 4795 tgt->cancel_key = vhost->task_set++; 4796 list_add_tail(&tgt->queue, &vhost->targets); 4797 4798 unlock_out: 4799 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4800 return 0; 4801 } 4802 4803 /** 4804 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 4805 * @vhost: ibmvfc host struct 4806 * 4807 * Returns: 4808 * 0 on success / other on failure 4809 **/ 4810 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 4811 { 4812 int i, rc; 4813 4814 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 4815 rc = ibmvfc_alloc_target(vhost, &vhost->disc_buf[i]); 4816 4817 return rc; 4818 } 4819 4820 /** 4821 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 4822 * @evt: ibmvfc event struct 4823 * 4824 **/ 4825 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 4826 { 4827 struct ibmvfc_host *vhost = evt->vhost; 4828 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 4829 u32 mad_status = be16_to_cpu(rsp->common.status); 4830 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4831 4832 switch (mad_status) { 4833 case IBMVFC_MAD_SUCCESS: 4834 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 4835 vhost->num_targets = be32_to_cpu(rsp->num_written); 4836 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 4837 break; 4838 case IBMVFC_MAD_FAILED: 4839 level += ibmvfc_retry_host_init(vhost); 4840 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 4841 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4842 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); 4843 break; 4844 case IBMVFC_MAD_DRIVER_FAILED: 4845 break; 4846 default: 4847 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 4848 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4849 break; 4850 } 4851 4852 ibmvfc_free_event(evt); 4853 wake_up(&vhost->work_wait_q); 4854 } 4855 4856 /** 4857 * ibmvfc_discover_targets - Send Discover Targets MAD 4858 * @vhost: ibmvfc host struct 4859 * 4860 **/ 4861 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 4862 { 4863 struct ibmvfc_discover_targets *mad; 4864 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); 4865 4866 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 4867 mad = &evt->iu.discover_targets; 4868 memset(mad, 0, sizeof(*mad)); 4869 mad->common.version = cpu_to_be32(1); 4870 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); 4871 mad->common.length = cpu_to_be16(sizeof(*mad)); 4872 mad->bufflen = cpu_to_be32(vhost->disc_buf_sz); 4873 mad->buffer.va = cpu_to_be64(vhost->disc_buf_dma); 4874 mad->buffer.len = cpu_to_be32(vhost->disc_buf_sz); 4875 mad->flags = cpu_to_be32(IBMVFC_DISC_TGT_PORT_ID_WWPN_LIST); 4876 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4877 4878 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4879 ibmvfc_dbg(vhost, "Sent discover targets\n"); 4880 else 4881 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4882 } 4883 4884 static void ibmvfc_channel_setup_done(struct ibmvfc_event *evt) 4885 { 4886 struct ibmvfc_host *vhost = evt->vhost; 4887 struct ibmvfc_channel_setup *setup = vhost->channel_setup_buf; 4888 struct ibmvfc_scsi_channels *scrqs = &vhost->scsi_scrqs; 4889 u32 mad_status = be16_to_cpu(evt->xfer_iu->channel_setup.common.status); 4890 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4891 int flags, active_queues, i; 4892 4893 ibmvfc_free_event(evt); 4894 4895 switch (mad_status) { 4896 case IBMVFC_MAD_SUCCESS: 4897 ibmvfc_dbg(vhost, "Channel Setup succeeded\n"); 4898 flags = be32_to_cpu(setup->flags); 4899 vhost->do_enquiry = 0; 4900 active_queues = be32_to_cpu(setup->num_scsi_subq_channels); 4901 scrqs->active_queues = active_queues; 4902 4903 if (flags & IBMVFC_CHANNELS_CANCELED) { 4904 ibmvfc_dbg(vhost, "Channels Canceled\n"); 4905 vhost->using_channels = 0; 4906 } else { 4907 if (active_queues) 4908 vhost->using_channels = 1; 4909 for (i = 0; i < active_queues; i++) 4910 scrqs->scrqs[i].vios_cookie = 4911 be64_to_cpu(setup->channel_handles[i]); 4912 4913 ibmvfc_dbg(vhost, "Using %u channels\n", 4914 vhost->scsi_scrqs.active_queues); 4915 } 4916 break; 4917 case IBMVFC_MAD_FAILED: 4918 level += ibmvfc_retry_host_init(vhost); 4919 ibmvfc_log(vhost, level, "Channel Setup failed\n"); 4920 fallthrough; 4921 case IBMVFC_MAD_DRIVER_FAILED: 4922 return; 4923 default: 4924 dev_err(vhost->dev, "Invalid Channel Setup response: 0x%x\n", 4925 mad_status); 4926 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4927 return; 4928 } 4929 4930 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 4931 wake_up(&vhost->work_wait_q); 4932 } 4933 4934 static void ibmvfc_channel_setup(struct ibmvfc_host *vhost) 4935 { 4936 struct ibmvfc_channel_setup_mad *mad; 4937 struct ibmvfc_channel_setup *setup_buf = vhost->channel_setup_buf; 4938 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); 4939 struct ibmvfc_scsi_channels *scrqs = &vhost->scsi_scrqs; 4940 unsigned int num_channels = 4941 min(vhost->client_scsi_channels, vhost->max_vios_scsi_channels); 4942 int i; 4943 4944 memset(setup_buf, 0, sizeof(*setup_buf)); 4945 if (num_channels == 0) 4946 setup_buf->flags = cpu_to_be32(IBMVFC_CANCEL_CHANNELS); 4947 else { 4948 setup_buf->num_scsi_subq_channels = cpu_to_be32(num_channels); 4949 for (i = 0; i < num_channels; i++) 4950 setup_buf->channel_handles[i] = cpu_to_be64(scrqs->scrqs[i].cookie); 4951 } 4952 4953 ibmvfc_init_event(evt, ibmvfc_channel_setup_done, IBMVFC_MAD_FORMAT); 4954 mad = &evt->iu.channel_setup; 4955 memset(mad, 0, sizeof(*mad)); 4956 mad->common.version = cpu_to_be32(1); 4957 mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_SETUP); 4958 mad->common.length = cpu_to_be16(sizeof(*mad)); 4959 mad->buffer.va = cpu_to_be64(vhost->channel_setup_dma); 4960 mad->buffer.len = cpu_to_be32(sizeof(*vhost->channel_setup_buf)); 4961 4962 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 4963 4964 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 4965 ibmvfc_dbg(vhost, "Sent channel setup\n"); 4966 else 4967 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 4968 } 4969 4970 static void ibmvfc_channel_enquiry_done(struct ibmvfc_event *evt) 4971 { 4972 struct ibmvfc_host *vhost = evt->vhost; 4973 struct ibmvfc_channel_enquiry *rsp = &evt->xfer_iu->channel_enquiry; 4974 u32 mad_status = be16_to_cpu(rsp->common.status); 4975 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4976 4977 switch (mad_status) { 4978 case IBMVFC_MAD_SUCCESS: 4979 ibmvfc_dbg(vhost, "Channel Enquiry succeeded\n"); 4980 vhost->max_vios_scsi_channels = be32_to_cpu(rsp->num_scsi_subq_channels); 4981 ibmvfc_free_event(evt); 4982 break; 4983 case IBMVFC_MAD_FAILED: 4984 level += ibmvfc_retry_host_init(vhost); 4985 ibmvfc_log(vhost, level, "Channel Enquiry failed\n"); 4986 fallthrough; 4987 case IBMVFC_MAD_DRIVER_FAILED: 4988 ibmvfc_free_event(evt); 4989 return; 4990 default: 4991 dev_err(vhost->dev, "Invalid Channel Enquiry response: 0x%x\n", 4992 mad_status); 4993 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4994 ibmvfc_free_event(evt); 4995 return; 4996 } 4997 4998 ibmvfc_channel_setup(vhost); 4999 } 5000 5001 static void ibmvfc_channel_enquiry(struct ibmvfc_host *vhost) 5002 { 5003 struct ibmvfc_channel_enquiry *mad; 5004 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); 5005 5006 ibmvfc_init_event(evt, ibmvfc_channel_enquiry_done, IBMVFC_MAD_FORMAT); 5007 mad = &evt->iu.channel_enquiry; 5008 memset(mad, 0, sizeof(*mad)); 5009 mad->common.version = cpu_to_be32(1); 5010 mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_ENQUIRY); 5011 mad->common.length = cpu_to_be16(sizeof(*mad)); 5012 5013 if (mig_channels_only) 5014 mad->flags |= cpu_to_be32(IBMVFC_NO_CHANNELS_TO_CRQ_SUPPORT); 5015 if (mig_no_less_channels) 5016 mad->flags |= cpu_to_be32(IBMVFC_NO_N_TO_M_CHANNELS_SUPPORT); 5017 5018 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 5019 5020 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5021 ibmvfc_dbg(vhost, "Send channel enquiry\n"); 5022 else 5023 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5024 } 5025 5026 /** 5027 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 5028 * @evt: ibmvfc event struct 5029 * 5030 **/ 5031 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 5032 { 5033 struct ibmvfc_host *vhost = evt->vhost; 5034 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); 5035 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 5036 unsigned int npiv_max_sectors; 5037 int level = IBMVFC_DEFAULT_LOG_LEVEL; 5038 5039 switch (mad_status) { 5040 case IBMVFC_MAD_SUCCESS: 5041 ibmvfc_free_event(evt); 5042 break; 5043 case IBMVFC_MAD_FAILED: 5044 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 5045 level += ibmvfc_retry_host_init(vhost); 5046 else 5047 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5048 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 5049 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 5050 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); 5051 ibmvfc_free_event(evt); 5052 return; 5053 case IBMVFC_MAD_CRQ_ERROR: 5054 ibmvfc_retry_host_init(vhost); 5055 fallthrough; 5056 case IBMVFC_MAD_DRIVER_FAILED: 5057 ibmvfc_free_event(evt); 5058 return; 5059 default: 5060 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 5061 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5062 ibmvfc_free_event(evt); 5063 return; 5064 } 5065 5066 vhost->client_migrated = 0; 5067 5068 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { 5069 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 5070 rsp->flags); 5071 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5072 wake_up(&vhost->work_wait_q); 5073 return; 5074 } 5075 5076 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { 5077 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 5078 rsp->max_cmds); 5079 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5080 wake_up(&vhost->work_wait_q); 5081 return; 5082 } 5083 5084 vhost->logged_in = 1; 5085 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); 5086 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 5087 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 5088 rsp->drc_name, npiv_max_sectors); 5089 5090 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); 5091 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); 5092 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); 5093 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); 5094 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 5095 fc_host_supported_classes(vhost->host) = 0; 5096 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) 5097 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 5098 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) 5099 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 5100 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) 5101 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 5102 fc_host_maxframe_size(vhost->host) = 5103 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; 5104 5105 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; 5106 vhost->host->max_sectors = npiv_max_sectors; 5107 5108 if (ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPORT_CHANNELS) && vhost->do_enquiry) { 5109 ibmvfc_channel_enquiry(vhost); 5110 } else { 5111 vhost->do_enquiry = 0; 5112 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 5113 wake_up(&vhost->work_wait_q); 5114 } 5115 } 5116 5117 /** 5118 * ibmvfc_npiv_login - Sends NPIV login 5119 * @vhost: ibmvfc host struct 5120 * 5121 **/ 5122 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 5123 { 5124 struct ibmvfc_npiv_login_mad *mad; 5125 struct ibmvfc_event *evt = ibmvfc_get_event(&vhost->crq); 5126 5127 ibmvfc_gather_partition_info(vhost); 5128 ibmvfc_set_login_info(vhost); 5129 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 5130 5131 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 5132 mad = &evt->iu.npiv_login; 5133 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 5134 mad->common.version = cpu_to_be32(1); 5135 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); 5136 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); 5137 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); 5138 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); 5139 5140 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 5141 5142 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5143 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 5144 else 5145 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5146 } 5147 5148 /** 5149 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 5150 * @evt: ibmvfc event struct 5151 * 5152 **/ 5153 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 5154 { 5155 struct ibmvfc_host *vhost = evt->vhost; 5156 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); 5157 5158 ibmvfc_free_event(evt); 5159 5160 switch (mad_status) { 5161 case IBMVFC_MAD_SUCCESS: 5162 if (list_empty(&vhost->crq.sent) && 5163 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 5164 ibmvfc_init_host(vhost); 5165 return; 5166 } 5167 break; 5168 case IBMVFC_MAD_FAILED: 5169 case IBMVFC_MAD_NOT_SUPPORTED: 5170 case IBMVFC_MAD_CRQ_ERROR: 5171 case IBMVFC_MAD_DRIVER_FAILED: 5172 default: 5173 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 5174 break; 5175 } 5176 5177 ibmvfc_hard_reset_host(vhost); 5178 } 5179 5180 /** 5181 * ibmvfc_npiv_logout - Issue an NPIV Logout 5182 * @vhost: ibmvfc host struct 5183 * 5184 **/ 5185 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 5186 { 5187 struct ibmvfc_npiv_logout_mad *mad; 5188 struct ibmvfc_event *evt; 5189 5190 evt = ibmvfc_get_event(&vhost->crq); 5191 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 5192 5193 mad = &evt->iu.npiv_logout; 5194 memset(mad, 0, sizeof(*mad)); 5195 mad->common.version = cpu_to_be32(1); 5196 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); 5197 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); 5198 5199 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 5200 5201 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5202 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 5203 else 5204 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5205 } 5206 5207 /** 5208 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 5209 * @vhost: ibmvfc host struct 5210 * 5211 * Returns: 5212 * 1 if work to do / 0 if not 5213 **/ 5214 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 5215 { 5216 struct ibmvfc_target *tgt; 5217 5218 list_for_each_entry(tgt, &vhost->targets, queue) { 5219 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 5220 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 5221 return 1; 5222 } 5223 5224 return 0; 5225 } 5226 5227 /** 5228 * ibmvfc_dev_logo_to_do - Is there target logout work to do? 5229 * @vhost: ibmvfc host struct 5230 * 5231 * Returns: 5232 * 1 if work to do / 0 if not 5233 **/ 5234 static int ibmvfc_dev_logo_to_do(struct ibmvfc_host *vhost) 5235 { 5236 struct ibmvfc_target *tgt; 5237 5238 list_for_each_entry(tgt, &vhost->targets, queue) { 5239 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT || 5240 tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) 5241 return 1; 5242 } 5243 return 0; 5244 } 5245 5246 /** 5247 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 5248 * @vhost: ibmvfc host struct 5249 * 5250 * Returns: 5251 * 1 if work to do / 0 if not 5252 **/ 5253 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 5254 { 5255 struct ibmvfc_target *tgt; 5256 5257 if (kthread_should_stop()) 5258 return 1; 5259 switch (vhost->action) { 5260 case IBMVFC_HOST_ACTION_NONE: 5261 case IBMVFC_HOST_ACTION_INIT_WAIT: 5262 case IBMVFC_HOST_ACTION_LOGO_WAIT: 5263 return 0; 5264 case IBMVFC_HOST_ACTION_TGT_INIT: 5265 case IBMVFC_HOST_ACTION_QUERY_TGTS: 5266 if (vhost->discovery_threads == disc_threads) 5267 return 0; 5268 list_for_each_entry(tgt, &vhost->targets, queue) 5269 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 5270 return 1; 5271 list_for_each_entry(tgt, &vhost->targets, queue) 5272 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 5273 return 0; 5274 return 1; 5275 case IBMVFC_HOST_ACTION_TGT_DEL: 5276 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 5277 if (vhost->discovery_threads == disc_threads) 5278 return 0; 5279 list_for_each_entry(tgt, &vhost->targets, queue) 5280 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) 5281 return 1; 5282 list_for_each_entry(tgt, &vhost->targets, queue) 5283 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) 5284 return 0; 5285 return 1; 5286 case IBMVFC_HOST_ACTION_LOGO: 5287 case IBMVFC_HOST_ACTION_INIT: 5288 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 5289 case IBMVFC_HOST_ACTION_QUERY: 5290 case IBMVFC_HOST_ACTION_RESET: 5291 case IBMVFC_HOST_ACTION_REENABLE: 5292 default: 5293 break; 5294 } 5295 5296 return 1; 5297 } 5298 5299 /** 5300 * ibmvfc_work_to_do - Is there task level work to do? 5301 * @vhost: ibmvfc host struct 5302 * 5303 * Returns: 5304 * 1 if work to do / 0 if not 5305 **/ 5306 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 5307 { 5308 unsigned long flags; 5309 int rc; 5310 5311 spin_lock_irqsave(vhost->host->host_lock, flags); 5312 rc = __ibmvfc_work_to_do(vhost); 5313 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5314 return rc; 5315 } 5316 5317 /** 5318 * ibmvfc_log_ae - Log async events if necessary 5319 * @vhost: ibmvfc host struct 5320 * @events: events to log 5321 * 5322 **/ 5323 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 5324 { 5325 if (events & IBMVFC_AE_RSCN) 5326 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 5327 if ((events & IBMVFC_AE_LINKDOWN) && 5328 vhost->state >= IBMVFC_HALTED) 5329 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 5330 if ((events & IBMVFC_AE_LINKUP) && 5331 vhost->state == IBMVFC_INITIALIZING) 5332 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 5333 } 5334 5335 /** 5336 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 5337 * @tgt: ibmvfc target struct 5338 * 5339 **/ 5340 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 5341 { 5342 struct ibmvfc_host *vhost = tgt->vhost; 5343 struct fc_rport *rport; 5344 unsigned long flags; 5345 5346 tgt_dbg(tgt, "Adding rport\n"); 5347 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 5348 spin_lock_irqsave(vhost->host->host_lock, flags); 5349 5350 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 5351 tgt_dbg(tgt, "Deleting rport\n"); 5352 list_del(&tgt->queue); 5353 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 5354 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5355 fc_remote_port_delete(rport); 5356 del_timer_sync(&tgt->timer); 5357 kref_put(&tgt->kref, ibmvfc_release_tgt); 5358 return; 5359 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 5360 tgt_dbg(tgt, "Deleting rport with outstanding I/O\n"); 5361 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); 5362 tgt->rport = NULL; 5363 tgt->init_retries = 0; 5364 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5365 fc_remote_port_delete(rport); 5366 return; 5367 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 5368 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5369 return; 5370 } 5371 5372 if (rport) { 5373 tgt_dbg(tgt, "rport add succeeded\n"); 5374 tgt->rport = rport; 5375 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; 5376 rport->supported_classes = 0; 5377 tgt->target_id = rport->scsi_target_id; 5378 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) 5379 rport->supported_classes |= FC_COS_CLASS1; 5380 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) 5381 rport->supported_classes |= FC_COS_CLASS2; 5382 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) 5383 rport->supported_classes |= FC_COS_CLASS3; 5384 if (rport->rqst_q) 5385 blk_queue_max_segments(rport->rqst_q, 1); 5386 } else 5387 tgt_dbg(tgt, "rport add failed\n"); 5388 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5389 } 5390 5391 /** 5392 * ibmvfc_do_work - Do task level work 5393 * @vhost: ibmvfc host struct 5394 * 5395 **/ 5396 static void ibmvfc_do_work(struct ibmvfc_host *vhost) 5397 { 5398 struct ibmvfc_target *tgt; 5399 unsigned long flags; 5400 struct fc_rport *rport; 5401 LIST_HEAD(purge); 5402 int rc; 5403 5404 ibmvfc_log_ae(vhost, vhost->events_to_log); 5405 spin_lock_irqsave(vhost->host->host_lock, flags); 5406 vhost->events_to_log = 0; 5407 switch (vhost->action) { 5408 case IBMVFC_HOST_ACTION_NONE: 5409 case IBMVFC_HOST_ACTION_LOGO_WAIT: 5410 case IBMVFC_HOST_ACTION_INIT_WAIT: 5411 break; 5412 case IBMVFC_HOST_ACTION_RESET: 5413 list_splice_init(&vhost->purge, &purge); 5414 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5415 ibmvfc_complete_purge(&purge); 5416 rc = ibmvfc_reset_crq(vhost); 5417 5418 spin_lock_irqsave(vhost->host->host_lock, flags); 5419 if (!rc || rc == H_CLOSED) 5420 vio_enable_interrupts(to_vio_dev(vhost->dev)); 5421 if (vhost->action == IBMVFC_HOST_ACTION_RESET) { 5422 /* 5423 * The only action we could have changed to would have 5424 * been reenable, in which case, we skip the rest of 5425 * this path and wait until we've done the re-enable 5426 * before sending the crq init. 5427 */ 5428 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 5429 5430 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 5431 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 5432 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5433 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 5434 } 5435 } 5436 break; 5437 case IBMVFC_HOST_ACTION_REENABLE: 5438 list_splice_init(&vhost->purge, &purge); 5439 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5440 ibmvfc_complete_purge(&purge); 5441 rc = ibmvfc_reenable_crq_queue(vhost); 5442 5443 spin_lock_irqsave(vhost->host->host_lock, flags); 5444 if (vhost->action == IBMVFC_HOST_ACTION_REENABLE) { 5445 /* 5446 * The only action we could have changed to would have 5447 * been reset, in which case, we skip the rest of this 5448 * path and wait until we've done the reset before 5449 * sending the crq init. 5450 */ 5451 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 5452 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 5453 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5454 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 5455 } 5456 } 5457 break; 5458 case IBMVFC_HOST_ACTION_LOGO: 5459 vhost->job_step(vhost); 5460 break; 5461 case IBMVFC_HOST_ACTION_INIT: 5462 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 5463 if (vhost->delay_init) { 5464 vhost->delay_init = 0; 5465 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5466 ssleep(15); 5467 return; 5468 } else 5469 vhost->job_step(vhost); 5470 break; 5471 case IBMVFC_HOST_ACTION_QUERY: 5472 list_for_each_entry(tgt, &vhost->targets, queue) 5473 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 5474 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 5475 break; 5476 case IBMVFC_HOST_ACTION_QUERY_TGTS: 5477 list_for_each_entry(tgt, &vhost->targets, queue) { 5478 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 5479 tgt->job_step(tgt); 5480 break; 5481 } 5482 } 5483 5484 if (!ibmvfc_dev_init_to_do(vhost)) 5485 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 5486 break; 5487 case IBMVFC_HOST_ACTION_TGT_DEL: 5488 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 5489 list_for_each_entry(tgt, &vhost->targets, queue) { 5490 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { 5491 tgt->job_step(tgt); 5492 break; 5493 } 5494 } 5495 5496 if (ibmvfc_dev_logo_to_do(vhost)) { 5497 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5498 return; 5499 } 5500 5501 list_for_each_entry(tgt, &vhost->targets, queue) { 5502 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 5503 tgt_dbg(tgt, "Deleting rport\n"); 5504 rport = tgt->rport; 5505 tgt->rport = NULL; 5506 list_del(&tgt->queue); 5507 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 5508 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5509 if (rport) 5510 fc_remote_port_delete(rport); 5511 del_timer_sync(&tgt->timer); 5512 kref_put(&tgt->kref, ibmvfc_release_tgt); 5513 return; 5514 } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 5515 tgt_dbg(tgt, "Deleting rport with I/O outstanding\n"); 5516 rport = tgt->rport; 5517 tgt->rport = NULL; 5518 tgt->init_retries = 0; 5519 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); 5520 5521 /* 5522 * If fast fail is enabled, we wait for it to fire and then clean up 5523 * the old port, since we expect the fast fail timer to clean up the 5524 * outstanding I/O faster than waiting for normal command timeouts. 5525 * However, if fast fail is disabled, any I/O outstanding to the 5526 * rport LUNs will stay outstanding indefinitely, since the EH handlers 5527 * won't get invoked for I/O's timing out. If this is a NPIV failover 5528 * scenario, the better alternative is to use the move login. 5529 */ 5530 if (rport && rport->fast_io_fail_tmo == -1) 5531 tgt->move_login = 1; 5532 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5533 if (rport) 5534 fc_remote_port_delete(rport); 5535 return; 5536 } 5537 } 5538 5539 if (vhost->state == IBMVFC_INITIALIZING) { 5540 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 5541 if (vhost->reinit) { 5542 vhost->reinit = 0; 5543 scsi_block_requests(vhost->host); 5544 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 5545 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5546 } else { 5547 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 5548 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 5549 wake_up(&vhost->init_wait_q); 5550 schedule_work(&vhost->rport_add_work_q); 5551 vhost->init_retries = 0; 5552 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5553 scsi_unblock_requests(vhost->host); 5554 } 5555 5556 return; 5557 } else { 5558 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 5559 vhost->job_step = ibmvfc_discover_targets; 5560 } 5561 } else { 5562 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 5563 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5564 scsi_unblock_requests(vhost->host); 5565 wake_up(&vhost->init_wait_q); 5566 return; 5567 } 5568 break; 5569 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 5570 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 5571 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5572 ibmvfc_alloc_targets(vhost); 5573 spin_lock_irqsave(vhost->host->host_lock, flags); 5574 break; 5575 case IBMVFC_HOST_ACTION_TGT_INIT: 5576 list_for_each_entry(tgt, &vhost->targets, queue) { 5577 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 5578 tgt->job_step(tgt); 5579 break; 5580 } 5581 } 5582 5583 if (!ibmvfc_dev_init_to_do(vhost)) 5584 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 5585 break; 5586 default: 5587 break; 5588 } 5589 5590 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5591 } 5592 5593 /** 5594 * ibmvfc_work - Do task level work 5595 * @data: ibmvfc host struct 5596 * 5597 * Returns: 5598 * zero 5599 **/ 5600 static int ibmvfc_work(void *data) 5601 { 5602 struct ibmvfc_host *vhost = data; 5603 int rc; 5604 5605 set_user_nice(current, MIN_NICE); 5606 5607 while (1) { 5608 rc = wait_event_interruptible(vhost->work_wait_q, 5609 ibmvfc_work_to_do(vhost)); 5610 5611 BUG_ON(rc); 5612 5613 if (kthread_should_stop()) 5614 break; 5615 5616 ibmvfc_do_work(vhost); 5617 } 5618 5619 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 5620 return 0; 5621 } 5622 5623 /** 5624 * ibmvfc_alloc_queue - Allocate queue 5625 * @vhost: ibmvfc host struct 5626 * @queue: ibmvfc queue to allocate 5627 * @fmt: queue format to allocate 5628 * 5629 * Returns: 5630 * 0 on success / non-zero on failure 5631 **/ 5632 static int ibmvfc_alloc_queue(struct ibmvfc_host *vhost, 5633 struct ibmvfc_queue *queue, 5634 enum ibmvfc_msg_fmt fmt) 5635 { 5636 struct device *dev = vhost->dev; 5637 size_t fmt_size; 5638 unsigned int pool_size = 0; 5639 5640 ENTER; 5641 spin_lock_init(&queue->_lock); 5642 queue->q_lock = &queue->_lock; 5643 5644 switch (fmt) { 5645 case IBMVFC_CRQ_FMT: 5646 fmt_size = sizeof(*queue->msgs.crq); 5647 pool_size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 5648 break; 5649 case IBMVFC_ASYNC_FMT: 5650 fmt_size = sizeof(*queue->msgs.async); 5651 break; 5652 case IBMVFC_SUB_CRQ_FMT: 5653 fmt_size = sizeof(*queue->msgs.scrq); 5654 /* We need one extra event for Cancel Commands */ 5655 pool_size = max_requests + 1; 5656 break; 5657 default: 5658 dev_warn(dev, "Unknown command/response queue message format: %d\n", fmt); 5659 return -EINVAL; 5660 } 5661 5662 if (ibmvfc_init_event_pool(vhost, queue, pool_size)) { 5663 dev_err(dev, "Couldn't initialize event pool.\n"); 5664 return -ENOMEM; 5665 } 5666 5667 queue->msgs.handle = (void *)get_zeroed_page(GFP_KERNEL); 5668 if (!queue->msgs.handle) 5669 return -ENOMEM; 5670 5671 queue->msg_token = dma_map_single(dev, queue->msgs.handle, PAGE_SIZE, 5672 DMA_BIDIRECTIONAL); 5673 5674 if (dma_mapping_error(dev, queue->msg_token)) { 5675 free_page((unsigned long)queue->msgs.handle); 5676 queue->msgs.handle = NULL; 5677 return -ENOMEM; 5678 } 5679 5680 queue->cur = 0; 5681 queue->fmt = fmt; 5682 queue->size = PAGE_SIZE / fmt_size; 5683 return 0; 5684 } 5685 5686 /** 5687 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 5688 * @vhost: ibmvfc host struct 5689 * 5690 * Allocates a page for messages, maps it for dma, and registers 5691 * the crq with the hypervisor. 5692 * 5693 * Return value: 5694 * zero on success / other on failure 5695 **/ 5696 static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 5697 { 5698 int rc, retrc = -ENOMEM; 5699 struct device *dev = vhost->dev; 5700 struct vio_dev *vdev = to_vio_dev(dev); 5701 struct ibmvfc_queue *crq = &vhost->crq; 5702 5703 ENTER; 5704 if (ibmvfc_alloc_queue(vhost, crq, IBMVFC_CRQ_FMT)) 5705 return -ENOMEM; 5706 5707 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5708 crq->msg_token, PAGE_SIZE); 5709 5710 if (rc == H_RESOURCE) 5711 /* maybe kexecing and resource is busy. try a reset */ 5712 retrc = rc = ibmvfc_reset_crq(vhost); 5713 5714 if (rc == H_CLOSED) 5715 dev_warn(dev, "Partner adapter not ready\n"); 5716 else if (rc) { 5717 dev_warn(dev, "Error %d opening adapter\n", rc); 5718 goto reg_crq_failed; 5719 } 5720 5721 retrc = 0; 5722 5723 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 5724 5725 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 5726 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 5727 goto req_irq_failed; 5728 } 5729 5730 if ((rc = vio_enable_interrupts(vdev))) { 5731 dev_err(dev, "Error %d enabling interrupts\n", rc); 5732 goto req_irq_failed; 5733 } 5734 5735 LEAVE; 5736 return retrc; 5737 5738 req_irq_failed: 5739 tasklet_kill(&vhost->tasklet); 5740 do { 5741 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5742 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5743 reg_crq_failed: 5744 ibmvfc_free_queue(vhost, crq); 5745 return retrc; 5746 } 5747 5748 static int ibmvfc_register_scsi_channel(struct ibmvfc_host *vhost, 5749 int index) 5750 { 5751 struct device *dev = vhost->dev; 5752 struct vio_dev *vdev = to_vio_dev(dev); 5753 struct ibmvfc_queue *scrq = &vhost->scsi_scrqs.scrqs[index]; 5754 int rc = -ENOMEM; 5755 5756 ENTER; 5757 5758 if (ibmvfc_alloc_queue(vhost, scrq, IBMVFC_SUB_CRQ_FMT)) 5759 return -ENOMEM; 5760 5761 rc = h_reg_sub_crq(vdev->unit_address, scrq->msg_token, PAGE_SIZE, 5762 &scrq->cookie, &scrq->hw_irq); 5763 5764 /* H_CLOSED indicates successful register, but no CRQ partner */ 5765 if (rc && rc != H_CLOSED) { 5766 dev_warn(dev, "Error registering sub-crq: %d\n", rc); 5767 if (rc == H_PARAMETER) 5768 dev_warn_once(dev, "Firmware may not support MQ\n"); 5769 goto reg_failed; 5770 } 5771 5772 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 5773 5774 if (!scrq->irq) { 5775 rc = -EINVAL; 5776 dev_err(dev, "Error mapping sub-crq[%d] irq\n", index); 5777 goto irq_failed; 5778 } 5779 5780 snprintf(scrq->name, sizeof(scrq->name), "ibmvfc-%x-scsi%d", 5781 vdev->unit_address, index); 5782 rc = request_irq(scrq->irq, ibmvfc_interrupt_scsi, 0, scrq->name, scrq); 5783 5784 if (rc) { 5785 dev_err(dev, "Couldn't register sub-crq[%d] irq\n", index); 5786 irq_dispose_mapping(scrq->irq); 5787 goto irq_failed; 5788 } 5789 5790 scrq->hwq_id = index; 5791 scrq->vhost = vhost; 5792 5793 LEAVE; 5794 return 0; 5795 5796 irq_failed: 5797 do { 5798 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, scrq->cookie); 5799 } while (rtas_busy_delay(rc)); 5800 reg_failed: 5801 ibmvfc_free_queue(vhost, scrq); 5802 LEAVE; 5803 return rc; 5804 } 5805 5806 static void ibmvfc_deregister_scsi_channel(struct ibmvfc_host *vhost, int index) 5807 { 5808 struct device *dev = vhost->dev; 5809 struct vio_dev *vdev = to_vio_dev(dev); 5810 struct ibmvfc_queue *scrq = &vhost->scsi_scrqs.scrqs[index]; 5811 long rc; 5812 5813 ENTER; 5814 5815 free_irq(scrq->irq, scrq); 5816 irq_dispose_mapping(scrq->irq); 5817 scrq->irq = 0; 5818 5819 do { 5820 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, 5821 scrq->cookie); 5822 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5823 5824 if (rc) 5825 dev_err(dev, "Failed to free sub-crq[%d]: rc=%ld\n", index, rc); 5826 5827 ibmvfc_free_queue(vhost, scrq); 5828 LEAVE; 5829 } 5830 5831 static void ibmvfc_init_sub_crqs(struct ibmvfc_host *vhost) 5832 { 5833 int i, j; 5834 5835 ENTER; 5836 if (!vhost->mq_enabled) 5837 return; 5838 5839 vhost->scsi_scrqs.scrqs = kcalloc(nr_scsi_hw_queues, 5840 sizeof(*vhost->scsi_scrqs.scrqs), 5841 GFP_KERNEL); 5842 if (!vhost->scsi_scrqs.scrqs) { 5843 vhost->do_enquiry = 0; 5844 return; 5845 } 5846 5847 for (i = 0; i < nr_scsi_hw_queues; i++) { 5848 if (ibmvfc_register_scsi_channel(vhost, i)) { 5849 for (j = i; j > 0; j--) 5850 ibmvfc_deregister_scsi_channel(vhost, j - 1); 5851 kfree(vhost->scsi_scrqs.scrqs); 5852 vhost->scsi_scrqs.scrqs = NULL; 5853 vhost->scsi_scrqs.active_queues = 0; 5854 vhost->do_enquiry = 0; 5855 break; 5856 } 5857 } 5858 5859 LEAVE; 5860 } 5861 5862 static void ibmvfc_release_sub_crqs(struct ibmvfc_host *vhost) 5863 { 5864 int i; 5865 5866 ENTER; 5867 if (!vhost->scsi_scrqs.scrqs) 5868 return; 5869 5870 for (i = 0; i < nr_scsi_hw_queues; i++) 5871 ibmvfc_deregister_scsi_channel(vhost, i); 5872 5873 kfree(vhost->scsi_scrqs.scrqs); 5874 vhost->scsi_scrqs.scrqs = NULL; 5875 vhost->scsi_scrqs.active_queues = 0; 5876 LEAVE; 5877 } 5878 5879 /** 5880 * ibmvfc_free_mem - Free memory for vhost 5881 * @vhost: ibmvfc host struct 5882 * 5883 * Return value: 5884 * none 5885 **/ 5886 static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 5887 { 5888 struct ibmvfc_queue *async_q = &vhost->async_crq; 5889 5890 ENTER; 5891 mempool_destroy(vhost->tgt_pool); 5892 kfree(vhost->trace); 5893 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 5894 vhost->disc_buf_dma); 5895 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 5896 vhost->login_buf, vhost->login_buf_dma); 5897 dma_free_coherent(vhost->dev, sizeof(*vhost->channel_setup_buf), 5898 vhost->channel_setup_buf, vhost->channel_setup_dma); 5899 dma_pool_destroy(vhost->sg_pool); 5900 ibmvfc_free_queue(vhost, async_q); 5901 LEAVE; 5902 } 5903 5904 /** 5905 * ibmvfc_alloc_mem - Allocate memory for vhost 5906 * @vhost: ibmvfc host struct 5907 * 5908 * Return value: 5909 * 0 on success / non-zero on failure 5910 **/ 5911 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 5912 { 5913 struct ibmvfc_queue *async_q = &vhost->async_crq; 5914 struct device *dev = vhost->dev; 5915 5916 ENTER; 5917 if (ibmvfc_alloc_queue(vhost, async_q, IBMVFC_ASYNC_FMT)) { 5918 dev_err(dev, "Couldn't allocate/map async queue.\n"); 5919 goto nomem; 5920 } 5921 5922 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 5923 SG_ALL * sizeof(struct srp_direct_buf), 5924 sizeof(struct srp_direct_buf), 0); 5925 5926 if (!vhost->sg_pool) { 5927 dev_err(dev, "Failed to allocate sg pool\n"); 5928 goto unmap_async_crq; 5929 } 5930 5931 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 5932 &vhost->login_buf_dma, GFP_KERNEL); 5933 5934 if (!vhost->login_buf) { 5935 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 5936 goto free_sg_pool; 5937 } 5938 5939 vhost->disc_buf_sz = sizeof(*vhost->disc_buf) * max_targets; 5940 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 5941 &vhost->disc_buf_dma, GFP_KERNEL); 5942 5943 if (!vhost->disc_buf) { 5944 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 5945 goto free_login_buffer; 5946 } 5947 5948 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 5949 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 5950 atomic_set(&vhost->trace_index, -1); 5951 5952 if (!vhost->trace) 5953 goto free_disc_buffer; 5954 5955 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 5956 sizeof(struct ibmvfc_target)); 5957 5958 if (!vhost->tgt_pool) { 5959 dev_err(dev, "Couldn't allocate target memory pool\n"); 5960 goto free_trace; 5961 } 5962 5963 vhost->channel_setup_buf = dma_alloc_coherent(dev, sizeof(*vhost->channel_setup_buf), 5964 &vhost->channel_setup_dma, 5965 GFP_KERNEL); 5966 5967 if (!vhost->channel_setup_buf) { 5968 dev_err(dev, "Couldn't allocate Channel Setup buffer\n"); 5969 goto free_tgt_pool; 5970 } 5971 5972 LEAVE; 5973 return 0; 5974 5975 free_tgt_pool: 5976 mempool_destroy(vhost->tgt_pool); 5977 free_trace: 5978 kfree(vhost->trace); 5979 free_disc_buffer: 5980 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 5981 vhost->disc_buf_dma); 5982 free_login_buffer: 5983 dma_free_coherent(dev, sizeof(*vhost->login_buf), 5984 vhost->login_buf, vhost->login_buf_dma); 5985 free_sg_pool: 5986 dma_pool_destroy(vhost->sg_pool); 5987 unmap_async_crq: 5988 ibmvfc_free_queue(vhost, async_q); 5989 nomem: 5990 LEAVE; 5991 return -ENOMEM; 5992 } 5993 5994 /** 5995 * ibmvfc_rport_add_thread - Worker thread for rport adds 5996 * @work: work struct 5997 * 5998 **/ 5999 static void ibmvfc_rport_add_thread(struct work_struct *work) 6000 { 6001 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 6002 rport_add_work_q); 6003 struct ibmvfc_target *tgt; 6004 struct fc_rport *rport; 6005 unsigned long flags; 6006 int did_work; 6007 6008 ENTER; 6009 spin_lock_irqsave(vhost->host->host_lock, flags); 6010 do { 6011 did_work = 0; 6012 if (vhost->state != IBMVFC_ACTIVE) 6013 break; 6014 6015 list_for_each_entry(tgt, &vhost->targets, queue) { 6016 if (tgt->add_rport) { 6017 did_work = 1; 6018 tgt->add_rport = 0; 6019 kref_get(&tgt->kref); 6020 rport = tgt->rport; 6021 if (!rport) { 6022 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6023 ibmvfc_tgt_add_rport(tgt); 6024 } else if (get_device(&rport->dev)) { 6025 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6026 tgt_dbg(tgt, "Setting rport roles\n"); 6027 fc_remote_port_rolechg(rport, tgt->ids.roles); 6028 put_device(&rport->dev); 6029 } else { 6030 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6031 } 6032 6033 kref_put(&tgt->kref, ibmvfc_release_tgt); 6034 spin_lock_irqsave(vhost->host->host_lock, flags); 6035 break; 6036 } 6037 } 6038 } while(did_work); 6039 6040 if (vhost->state == IBMVFC_ACTIVE) 6041 vhost->scan_complete = 1; 6042 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6043 LEAVE; 6044 } 6045 6046 /** 6047 * ibmvfc_probe - Adapter hot plug add entry point 6048 * @vdev: vio device struct 6049 * @id: vio device id struct 6050 * 6051 * Return value: 6052 * 0 on success / non-zero on failure 6053 **/ 6054 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 6055 { 6056 struct ibmvfc_host *vhost; 6057 struct Scsi_Host *shost; 6058 struct device *dev = &vdev->dev; 6059 int rc = -ENOMEM; 6060 unsigned int max_scsi_queues = IBMVFC_MAX_SCSI_QUEUES; 6061 6062 ENTER; 6063 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 6064 if (!shost) { 6065 dev_err(dev, "Couldn't allocate host data\n"); 6066 goto out; 6067 } 6068 6069 shost->transportt = ibmvfc_transport_template; 6070 shost->can_queue = max_requests; 6071 shost->max_lun = max_lun; 6072 shost->max_id = max_targets; 6073 shost->max_sectors = IBMVFC_MAX_SECTORS; 6074 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 6075 shost->unique_id = shost->host_no; 6076 shost->nr_hw_queues = mq_enabled ? min(max_scsi_queues, nr_scsi_hw_queues) : 1; 6077 6078 vhost = shost_priv(shost); 6079 INIT_LIST_HEAD(&vhost->targets); 6080 INIT_LIST_HEAD(&vhost->purge); 6081 sprintf(vhost->name, IBMVFC_NAME); 6082 vhost->host = shost; 6083 vhost->dev = dev; 6084 vhost->partition_number = -1; 6085 vhost->log_level = log_level; 6086 vhost->task_set = 1; 6087 6088 vhost->mq_enabled = mq_enabled; 6089 vhost->client_scsi_channels = min(shost->nr_hw_queues, nr_scsi_channels); 6090 vhost->using_channels = 0; 6091 vhost->do_enquiry = 1; 6092 vhost->scan_timeout = 0; 6093 6094 strcpy(vhost->partition_name, "UNKNOWN"); 6095 init_waitqueue_head(&vhost->work_wait_q); 6096 init_waitqueue_head(&vhost->init_wait_q); 6097 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 6098 mutex_init(&vhost->passthru_mutex); 6099 6100 if ((rc = ibmvfc_alloc_mem(vhost))) 6101 goto free_scsi_host; 6102 6103 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 6104 shost->host_no); 6105 6106 if (IS_ERR(vhost->work_thread)) { 6107 dev_err(dev, "Couldn't create kernel thread: %ld\n", 6108 PTR_ERR(vhost->work_thread)); 6109 rc = PTR_ERR(vhost->work_thread); 6110 goto free_host_mem; 6111 } 6112 6113 if ((rc = ibmvfc_init_crq(vhost))) { 6114 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 6115 goto kill_kthread; 6116 } 6117 6118 if ((rc = scsi_add_host(shost, dev))) 6119 goto release_crq; 6120 6121 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 6122 6123 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 6124 &ibmvfc_trace_attr))) { 6125 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 6126 goto remove_shost; 6127 } 6128 6129 ibmvfc_init_sub_crqs(vhost); 6130 6131 if (shost_to_fc_host(shost)->rqst_q) 6132 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 6133 dev_set_drvdata(dev, vhost); 6134 spin_lock(&ibmvfc_driver_lock); 6135 list_add_tail(&vhost->queue, &ibmvfc_head); 6136 spin_unlock(&ibmvfc_driver_lock); 6137 6138 ibmvfc_send_crq_init(vhost); 6139 scsi_scan_host(shost); 6140 return 0; 6141 6142 remove_shost: 6143 scsi_remove_host(shost); 6144 release_crq: 6145 ibmvfc_release_crq_queue(vhost); 6146 kill_kthread: 6147 kthread_stop(vhost->work_thread); 6148 free_host_mem: 6149 ibmvfc_free_mem(vhost); 6150 free_scsi_host: 6151 scsi_host_put(shost); 6152 out: 6153 LEAVE; 6154 return rc; 6155 } 6156 6157 /** 6158 * ibmvfc_remove - Adapter hot plug remove entry point 6159 * @vdev: vio device struct 6160 * 6161 * Return value: 6162 * 0 6163 **/ 6164 static void ibmvfc_remove(struct vio_dev *vdev) 6165 { 6166 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 6167 LIST_HEAD(purge); 6168 unsigned long flags; 6169 6170 ENTER; 6171 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 6172 6173 spin_lock_irqsave(vhost->host->host_lock, flags); 6174 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 6175 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6176 6177 ibmvfc_wait_while_resetting(vhost); 6178 kthread_stop(vhost->work_thread); 6179 fc_remove_host(vhost->host); 6180 scsi_remove_host(vhost->host); 6181 6182 spin_lock_irqsave(vhost->host->host_lock, flags); 6183 ibmvfc_purge_requests(vhost, DID_ERROR); 6184 list_splice_init(&vhost->purge, &purge); 6185 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6186 ibmvfc_complete_purge(&purge); 6187 ibmvfc_release_sub_crqs(vhost); 6188 ibmvfc_release_crq_queue(vhost); 6189 6190 ibmvfc_free_mem(vhost); 6191 spin_lock(&ibmvfc_driver_lock); 6192 list_del(&vhost->queue); 6193 spin_unlock(&ibmvfc_driver_lock); 6194 scsi_host_put(vhost->host); 6195 LEAVE; 6196 } 6197 6198 /** 6199 * ibmvfc_resume - Resume from suspend 6200 * @dev: device struct 6201 * 6202 * We may have lost an interrupt across suspend/resume, so kick the 6203 * interrupt handler 6204 * 6205 */ 6206 static int ibmvfc_resume(struct device *dev) 6207 { 6208 unsigned long flags; 6209 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 6210 struct vio_dev *vdev = to_vio_dev(dev); 6211 6212 spin_lock_irqsave(vhost->host->host_lock, flags); 6213 vio_disable_interrupts(vdev); 6214 tasklet_schedule(&vhost->tasklet); 6215 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6216 return 0; 6217 } 6218 6219 /** 6220 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 6221 * @vdev: vio device struct 6222 * 6223 * Return value: 6224 * Number of bytes the driver will need to DMA map at the same time in 6225 * order to perform well. 6226 */ 6227 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 6228 { 6229 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 6230 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 6231 } 6232 6233 static const struct vio_device_id ibmvfc_device_table[] = { 6234 {"fcp", "IBM,vfc-client"}, 6235 { "", "" } 6236 }; 6237 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 6238 6239 static const struct dev_pm_ops ibmvfc_pm_ops = { 6240 .resume = ibmvfc_resume 6241 }; 6242 6243 static struct vio_driver ibmvfc_driver = { 6244 .id_table = ibmvfc_device_table, 6245 .probe = ibmvfc_probe, 6246 .remove = ibmvfc_remove, 6247 .get_desired_dma = ibmvfc_get_desired_dma, 6248 .name = IBMVFC_NAME, 6249 .pm = &ibmvfc_pm_ops, 6250 }; 6251 6252 static struct fc_function_template ibmvfc_transport_functions = { 6253 .show_host_fabric_name = 1, 6254 .show_host_node_name = 1, 6255 .show_host_port_name = 1, 6256 .show_host_supported_classes = 1, 6257 .show_host_port_type = 1, 6258 .show_host_port_id = 1, 6259 .show_host_maxframe_size = 1, 6260 6261 .get_host_port_state = ibmvfc_get_host_port_state, 6262 .show_host_port_state = 1, 6263 6264 .get_host_speed = ibmvfc_get_host_speed, 6265 .show_host_speed = 1, 6266 6267 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 6268 .terminate_rport_io = ibmvfc_terminate_rport_io, 6269 6270 .show_rport_maxframe_size = 1, 6271 .show_rport_supported_classes = 1, 6272 6273 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 6274 .show_rport_dev_loss_tmo = 1, 6275 6276 .get_starget_node_name = ibmvfc_get_starget_node_name, 6277 .show_starget_node_name = 1, 6278 6279 .get_starget_port_name = ibmvfc_get_starget_port_name, 6280 .show_starget_port_name = 1, 6281 6282 .get_starget_port_id = ibmvfc_get_starget_port_id, 6283 .show_starget_port_id = 1, 6284 6285 .bsg_request = ibmvfc_bsg_request, 6286 .bsg_timeout = ibmvfc_bsg_timeout, 6287 }; 6288 6289 /** 6290 * ibmvfc_module_init - Initialize the ibmvfc module 6291 * 6292 * Return value: 6293 * 0 on success / other on failure 6294 **/ 6295 static int __init ibmvfc_module_init(void) 6296 { 6297 int rc; 6298 6299 if (!firmware_has_feature(FW_FEATURE_VIO)) 6300 return -ENODEV; 6301 6302 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 6303 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 6304 6305 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 6306 if (!ibmvfc_transport_template) 6307 return -ENOMEM; 6308 6309 rc = vio_register_driver(&ibmvfc_driver); 6310 if (rc) 6311 fc_release_transport(ibmvfc_transport_template); 6312 return rc; 6313 } 6314 6315 /** 6316 * ibmvfc_module_exit - Teardown the ibmvfc module 6317 * 6318 * Return value: 6319 * nothing 6320 **/ 6321 static void __exit ibmvfc_module_exit(void) 6322 { 6323 vio_unregister_driver(&ibmvfc_driver); 6324 fc_release_transport(ibmvfc_transport_template); 6325 } 6326 6327 module_init(ibmvfc_module_init); 6328 module_exit(ibmvfc_module_exit); 6329