1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 4 * 5 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 6 * 7 * Copyright (C) IBM Corporation, 2008 8 */ 9 10 #include <linux/module.h> 11 #include <linux/moduleparam.h> 12 #include <linux/dma-mapping.h> 13 #include <linux/dmapool.h> 14 #include <linux/delay.h> 15 #include <linux/interrupt.h> 16 #include <linux/irqdomain.h> 17 #include <linux/kthread.h> 18 #include <linux/slab.h> 19 #include <linux/of.h> 20 #include <linux/pm.h> 21 #include <linux/stringify.h> 22 #include <linux/bsg-lib.h> 23 #include <asm/firmware.h> 24 #include <asm/irq.h> 25 #include <asm/vio.h> 26 #include <scsi/scsi.h> 27 #include <scsi/scsi_cmnd.h> 28 #include <scsi/scsi_host.h> 29 #include <scsi/scsi_device.h> 30 #include <scsi/scsi_tcq.h> 31 #include <scsi/scsi_transport_fc.h> 32 #include <scsi/scsi_bsg_fc.h> 33 #include "ibmvfc.h" 34 35 static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 36 static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 37 static u64 max_lun = IBMVFC_MAX_LUN; 38 static unsigned int max_targets = IBMVFC_MAX_TARGETS; 39 static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 40 static u16 scsi_qdepth = IBMVFC_SCSI_QDEPTH; 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(scsi_qdepth, scsi_qdepth, ushort, S_IRUGO); 87 MODULE_PARM_DESC(scsi_qdepth, "Maximum scsi command depth per adapter queue. " 88 "[Default=" __stringify(IBMVFC_SCSI_QDEPTH) "]"); 89 module_param_named(max_lun, max_lun, ullong, S_IRUGO); 90 MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 91 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 92 module_param_named(max_targets, max_targets, uint, S_IRUGO); 93 MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 94 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 95 module_param_named(disc_threads, disc_threads, uint, S_IRUGO); 96 MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 97 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 98 module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 99 MODULE_PARM_DESC(debug, "Enable driver debug information. " 100 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 101 module_param_named(log_level, log_level, uint, 0); 102 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 103 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 104 module_param_named(cls3_error, cls3_error, uint, 0); 105 MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. " 106 "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]"); 107 108 static const struct { 109 u16 status; 110 u16 error; 111 u8 result; 112 u8 retry; 113 int log; 114 char *name; 115 } cmd_status [] = { 116 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 117 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 118 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 119 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 120 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 121 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 122 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 123 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 124 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 125 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 126 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 127 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 128 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, 129 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 130 131 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 132 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 133 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 134 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 135 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 136 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 137 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 138 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 139 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 140 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 141 142 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 143 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 144 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 145 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 146 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 147 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 148 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 149 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 150 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 151 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 152 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 153 154 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 155 { IBMVFC_FC_SCSI_ERROR, IBMVFC_COMMAND_FAILED, DID_ERROR, 0, 1, "PRLI to device failed." }, 156 }; 157 158 static void ibmvfc_npiv_login(struct ibmvfc_host *); 159 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 160 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 161 static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 162 static void ibmvfc_npiv_logout(struct ibmvfc_host *); 163 static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *); 164 static void ibmvfc_tgt_move_login(struct ibmvfc_target *); 165 166 static void ibmvfc_dereg_sub_crqs(struct ibmvfc_host *, struct ibmvfc_channels *); 167 static void ibmvfc_reg_sub_crqs(struct ibmvfc_host *, struct ibmvfc_channels *); 168 169 static const char *unknown_error = "unknown error"; 170 171 static long h_reg_sub_crq(unsigned long unit_address, unsigned long ioba, 172 unsigned long length, unsigned long *cookie, 173 unsigned long *irq) 174 { 175 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 176 long rc; 177 178 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, ioba, length); 179 *cookie = retbuf[0]; 180 *irq = retbuf[1]; 181 182 return rc; 183 } 184 185 static int ibmvfc_check_caps(struct ibmvfc_host *vhost, unsigned long cap_flags) 186 { 187 u64 host_caps = be64_to_cpu(vhost->login_buf->resp.capabilities); 188 189 return (host_caps & cap_flags) ? 1 : 0; 190 } 191 192 static struct ibmvfc_fcp_cmd_iu *ibmvfc_get_fcp_iu(struct ibmvfc_host *vhost, 193 struct ibmvfc_cmd *vfc_cmd) 194 { 195 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 196 return &vfc_cmd->v2.iu; 197 else 198 return &vfc_cmd->v1.iu; 199 } 200 201 static struct ibmvfc_fcp_rsp *ibmvfc_get_fcp_rsp(struct ibmvfc_host *vhost, 202 struct ibmvfc_cmd *vfc_cmd) 203 { 204 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 205 return &vfc_cmd->v2.rsp; 206 else 207 return &vfc_cmd->v1.rsp; 208 } 209 210 #ifdef CONFIG_SCSI_IBMVFC_TRACE 211 /** 212 * ibmvfc_trc_start - Log a start trace entry 213 * @evt: ibmvfc event struct 214 * 215 **/ 216 static void ibmvfc_trc_start(struct ibmvfc_event *evt) 217 { 218 struct ibmvfc_host *vhost = evt->vhost; 219 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 220 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 221 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 222 struct ibmvfc_trace_entry *entry; 223 int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK; 224 225 entry = &vhost->trace[index]; 226 entry->evt = evt; 227 entry->time = jiffies; 228 entry->fmt = evt->crq.format; 229 entry->type = IBMVFC_TRC_START; 230 231 switch (entry->fmt) { 232 case IBMVFC_CMD_FORMAT: 233 entry->op_code = iu->cdb[0]; 234 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 235 entry->lun = scsilun_to_int(&iu->lun); 236 entry->tmf_flags = iu->tmf_flags; 237 entry->u.start.xfer_len = be32_to_cpu(iu->xfer_len); 238 break; 239 case IBMVFC_MAD_FORMAT: 240 entry->op_code = be32_to_cpu(mad->opcode); 241 break; 242 default: 243 break; 244 } 245 } 246 247 /** 248 * ibmvfc_trc_end - Log an end trace entry 249 * @evt: ibmvfc event struct 250 * 251 **/ 252 static void ibmvfc_trc_end(struct ibmvfc_event *evt) 253 { 254 struct ibmvfc_host *vhost = evt->vhost; 255 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 256 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 257 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 258 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 259 struct ibmvfc_trace_entry *entry; 260 int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK; 261 262 entry = &vhost->trace[index]; 263 entry->evt = evt; 264 entry->time = jiffies; 265 entry->fmt = evt->crq.format; 266 entry->type = IBMVFC_TRC_END; 267 268 switch (entry->fmt) { 269 case IBMVFC_CMD_FORMAT: 270 entry->op_code = iu->cdb[0]; 271 entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); 272 entry->lun = scsilun_to_int(&iu->lun); 273 entry->tmf_flags = iu->tmf_flags; 274 entry->u.end.status = be16_to_cpu(vfc_cmd->status); 275 entry->u.end.error = be16_to_cpu(vfc_cmd->error); 276 entry->u.end.fcp_rsp_flags = rsp->flags; 277 entry->u.end.rsp_code = rsp->data.info.rsp_code; 278 entry->u.end.scsi_status = rsp->scsi_status; 279 break; 280 case IBMVFC_MAD_FORMAT: 281 entry->op_code = be32_to_cpu(mad->opcode); 282 entry->u.end.status = be16_to_cpu(mad->status); 283 break; 284 default: 285 break; 286 287 } 288 } 289 290 #else 291 #define ibmvfc_trc_start(evt) do { } while (0) 292 #define ibmvfc_trc_end(evt) do { } while (0) 293 #endif 294 295 /** 296 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 297 * @status: status / error class 298 * @error: error 299 * 300 * Return value: 301 * index into cmd_status / -EINVAL on failure 302 **/ 303 static int ibmvfc_get_err_index(u16 status, u16 error) 304 { 305 int i; 306 307 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 308 if ((cmd_status[i].status & status) == cmd_status[i].status && 309 cmd_status[i].error == error) 310 return i; 311 312 return -EINVAL; 313 } 314 315 /** 316 * ibmvfc_get_cmd_error - Find the error description for the fcp response 317 * @status: status / error class 318 * @error: error 319 * 320 * Return value: 321 * error description string 322 **/ 323 static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 324 { 325 int rc = ibmvfc_get_err_index(status, error); 326 if (rc >= 0) 327 return cmd_status[rc].name; 328 return unknown_error; 329 } 330 331 /** 332 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 333 * @vhost: ibmvfc host struct 334 * @vfc_cmd: ibmvfc command struct 335 * 336 * Return value: 337 * SCSI result value to return for completed command 338 **/ 339 static int ibmvfc_get_err_result(struct ibmvfc_host *vhost, struct ibmvfc_cmd *vfc_cmd) 340 { 341 int err; 342 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 343 int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 344 345 if ((rsp->flags & FCP_RSP_LEN_VALID) && 346 ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 347 rsp->data.info.rsp_code)) 348 return DID_ERROR << 16; 349 350 err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 351 if (err >= 0) 352 return rsp->scsi_status | (cmd_status[err].result << 16); 353 return rsp->scsi_status | (DID_ERROR << 16); 354 } 355 356 /** 357 * ibmvfc_retry_cmd - Determine if error status is retryable 358 * @status: status / error class 359 * @error: error 360 * 361 * Return value: 362 * 1 if error should be retried / 0 if it should not 363 **/ 364 static int ibmvfc_retry_cmd(u16 status, u16 error) 365 { 366 int rc = ibmvfc_get_err_index(status, error); 367 368 if (rc >= 0) 369 return cmd_status[rc].retry; 370 return 1; 371 } 372 373 static const char *unknown_fc_explain = "unknown fc explain"; 374 375 static const struct { 376 u16 fc_explain; 377 char *name; 378 } ls_explain [] = { 379 { 0x00, "no additional explanation" }, 380 { 0x01, "service parameter error - options" }, 381 { 0x03, "service parameter error - initiator control" }, 382 { 0x05, "service parameter error - recipient control" }, 383 { 0x07, "service parameter error - received data field size" }, 384 { 0x09, "service parameter error - concurrent seq" }, 385 { 0x0B, "service parameter error - credit" }, 386 { 0x0D, "invalid N_Port/F_Port_Name" }, 387 { 0x0E, "invalid node/Fabric Name" }, 388 { 0x0F, "invalid common service parameters" }, 389 { 0x11, "invalid association header" }, 390 { 0x13, "association header required" }, 391 { 0x15, "invalid originator S_ID" }, 392 { 0x17, "invalid OX_ID-RX-ID combination" }, 393 { 0x19, "command (request) already in progress" }, 394 { 0x1E, "N_Port Login requested" }, 395 { 0x1F, "Invalid N_Port_ID" }, 396 }; 397 398 static const struct { 399 u16 fc_explain; 400 char *name; 401 } gs_explain [] = { 402 { 0x00, "no additional explanation" }, 403 { 0x01, "port identifier not registered" }, 404 { 0x02, "port name not registered" }, 405 { 0x03, "node name not registered" }, 406 { 0x04, "class of service not registered" }, 407 { 0x06, "initial process associator not registered" }, 408 { 0x07, "FC-4 TYPEs not registered" }, 409 { 0x08, "symbolic port name not registered" }, 410 { 0x09, "symbolic node name not registered" }, 411 { 0x0A, "port type not registered" }, 412 { 0xF0, "authorization exception" }, 413 { 0xF1, "authentication exception" }, 414 { 0xF2, "data base full" }, 415 { 0xF3, "data base empty" }, 416 { 0xF4, "processing request" }, 417 { 0xF5, "unable to verify connection" }, 418 { 0xF6, "devices not in a common zone" }, 419 }; 420 421 /** 422 * ibmvfc_get_ls_explain - Return the FC Explain description text 423 * @status: FC Explain status 424 * 425 * Returns: 426 * error string 427 **/ 428 static const char *ibmvfc_get_ls_explain(u16 status) 429 { 430 int i; 431 432 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 433 if (ls_explain[i].fc_explain == status) 434 return ls_explain[i].name; 435 436 return unknown_fc_explain; 437 } 438 439 /** 440 * ibmvfc_get_gs_explain - Return the FC Explain description text 441 * @status: FC Explain status 442 * 443 * Returns: 444 * error string 445 **/ 446 static const char *ibmvfc_get_gs_explain(u16 status) 447 { 448 int i; 449 450 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 451 if (gs_explain[i].fc_explain == status) 452 return gs_explain[i].name; 453 454 return unknown_fc_explain; 455 } 456 457 static const struct { 458 enum ibmvfc_fc_type fc_type; 459 char *name; 460 } fc_type [] = { 461 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 462 { IBMVFC_PORT_REJECT, "port reject" }, 463 { IBMVFC_LS_REJECT, "ELS reject" }, 464 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 465 { IBMVFC_PORT_BUSY, "port busy" }, 466 { IBMVFC_BASIC_REJECT, "basic reject" }, 467 }; 468 469 static const char *unknown_fc_type = "unknown fc type"; 470 471 /** 472 * ibmvfc_get_fc_type - Return the FC Type description text 473 * @status: FC Type error status 474 * 475 * Returns: 476 * error string 477 **/ 478 static const char *ibmvfc_get_fc_type(u16 status) 479 { 480 int i; 481 482 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 483 if (fc_type[i].fc_type == status) 484 return fc_type[i].name; 485 486 return unknown_fc_type; 487 } 488 489 /** 490 * ibmvfc_set_tgt_action - Set the next init action for the target 491 * @tgt: ibmvfc target struct 492 * @action: action to perform 493 * 494 * Returns: 495 * 0 if action changed / non-zero if not changed 496 **/ 497 static int ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 498 enum ibmvfc_target_action action) 499 { 500 int rc = -EINVAL; 501 502 switch (tgt->action) { 503 case IBMVFC_TGT_ACTION_LOGOUT_RPORT: 504 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT || 505 action == IBMVFC_TGT_ACTION_DEL_RPORT) { 506 tgt->action = action; 507 rc = 0; 508 } 509 break; 510 case IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT: 511 if (action == IBMVFC_TGT_ACTION_DEL_RPORT || 512 action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 513 tgt->action = action; 514 rc = 0; 515 } 516 break; 517 case IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT: 518 if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { 519 tgt->action = action; 520 rc = 0; 521 } 522 break; 523 case IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT: 524 if (action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 525 tgt->action = action; 526 rc = 0; 527 } 528 break; 529 case IBMVFC_TGT_ACTION_DEL_RPORT: 530 if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 531 tgt->action = action; 532 rc = 0; 533 } 534 break; 535 case IBMVFC_TGT_ACTION_DELETED_RPORT: 536 break; 537 default: 538 tgt->action = action; 539 rc = 0; 540 break; 541 } 542 543 if (action >= IBMVFC_TGT_ACTION_LOGOUT_RPORT) 544 tgt->add_rport = 0; 545 546 return rc; 547 } 548 549 /** 550 * ibmvfc_set_host_state - Set the state for the host 551 * @vhost: ibmvfc host struct 552 * @state: state to set host to 553 * 554 * Returns: 555 * 0 if state changed / non-zero if not changed 556 **/ 557 static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 558 enum ibmvfc_host_state state) 559 { 560 int rc = 0; 561 562 switch (vhost->state) { 563 case IBMVFC_HOST_OFFLINE: 564 rc = -EINVAL; 565 break; 566 default: 567 vhost->state = state; 568 break; 569 } 570 571 return rc; 572 } 573 574 /** 575 * ibmvfc_set_host_action - Set the next init action for the host 576 * @vhost: ibmvfc host struct 577 * @action: action to perform 578 * 579 **/ 580 static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 581 enum ibmvfc_host_action action) 582 { 583 switch (action) { 584 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 585 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 586 vhost->action = action; 587 break; 588 case IBMVFC_HOST_ACTION_LOGO_WAIT: 589 if (vhost->action == IBMVFC_HOST_ACTION_LOGO) 590 vhost->action = action; 591 break; 592 case IBMVFC_HOST_ACTION_INIT_WAIT: 593 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 594 vhost->action = action; 595 break; 596 case IBMVFC_HOST_ACTION_QUERY: 597 switch (vhost->action) { 598 case IBMVFC_HOST_ACTION_INIT_WAIT: 599 case IBMVFC_HOST_ACTION_NONE: 600 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 601 vhost->action = action; 602 break; 603 default: 604 break; 605 } 606 break; 607 case IBMVFC_HOST_ACTION_TGT_INIT: 608 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 609 vhost->action = action; 610 break; 611 case IBMVFC_HOST_ACTION_REENABLE: 612 case IBMVFC_HOST_ACTION_RESET: 613 vhost->action = action; 614 break; 615 case IBMVFC_HOST_ACTION_INIT: 616 case IBMVFC_HOST_ACTION_TGT_DEL: 617 case IBMVFC_HOST_ACTION_LOGO: 618 case IBMVFC_HOST_ACTION_QUERY_TGTS: 619 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 620 case IBMVFC_HOST_ACTION_NONE: 621 default: 622 switch (vhost->action) { 623 case IBMVFC_HOST_ACTION_RESET: 624 case IBMVFC_HOST_ACTION_REENABLE: 625 break; 626 default: 627 vhost->action = action; 628 break; 629 } 630 break; 631 } 632 } 633 634 /** 635 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 636 * @vhost: ibmvfc host struct 637 * 638 * Return value: 639 * nothing 640 **/ 641 static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 642 { 643 if (vhost->action == IBMVFC_HOST_ACTION_NONE && 644 vhost->state == IBMVFC_ACTIVE) { 645 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 646 scsi_block_requests(vhost->host); 647 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 648 } 649 } else 650 vhost->reinit = 1; 651 652 wake_up(&vhost->work_wait_q); 653 } 654 655 /** 656 * ibmvfc_del_tgt - Schedule cleanup and removal of the target 657 * @tgt: ibmvfc target struct 658 **/ 659 static void ibmvfc_del_tgt(struct ibmvfc_target *tgt) 660 { 661 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT)) { 662 tgt->job_step = ibmvfc_tgt_implicit_logout_and_del; 663 tgt->init_retries = 0; 664 } 665 wake_up(&tgt->vhost->work_wait_q); 666 } 667 668 /** 669 * ibmvfc_link_down - Handle a link down event from the adapter 670 * @vhost: ibmvfc host struct 671 * @state: ibmvfc host state to enter 672 * 673 **/ 674 static void ibmvfc_link_down(struct ibmvfc_host *vhost, 675 enum ibmvfc_host_state state) 676 { 677 struct ibmvfc_target *tgt; 678 679 ENTER; 680 scsi_block_requests(vhost->host); 681 list_for_each_entry(tgt, &vhost->targets, queue) 682 ibmvfc_del_tgt(tgt); 683 ibmvfc_set_host_state(vhost, state); 684 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 685 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 686 wake_up(&vhost->work_wait_q); 687 LEAVE; 688 } 689 690 /** 691 * ibmvfc_init_host - Start host initialization 692 * @vhost: ibmvfc host struct 693 * 694 * Return value: 695 * nothing 696 **/ 697 static void ibmvfc_init_host(struct ibmvfc_host *vhost) 698 { 699 struct ibmvfc_target *tgt; 700 701 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 702 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 703 dev_err(vhost->dev, 704 "Host initialization retries exceeded. Taking adapter offline\n"); 705 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 706 return; 707 } 708 } 709 710 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 711 memset(vhost->async_crq.msgs.async, 0, PAGE_SIZE); 712 vhost->async_crq.cur = 0; 713 714 list_for_each_entry(tgt, &vhost->targets, queue) { 715 if (vhost->client_migrated) 716 tgt->need_login = 1; 717 else 718 ibmvfc_del_tgt(tgt); 719 } 720 721 scsi_block_requests(vhost->host); 722 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 723 vhost->job_step = ibmvfc_npiv_login; 724 wake_up(&vhost->work_wait_q); 725 } 726 } 727 728 /** 729 * ibmvfc_send_crq - Send a CRQ 730 * @vhost: ibmvfc host struct 731 * @word1: the first 64 bits of the data 732 * @word2: the second 64 bits of the data 733 * 734 * Return value: 735 * 0 on success / other on failure 736 **/ 737 static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 738 { 739 struct vio_dev *vdev = to_vio_dev(vhost->dev); 740 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 741 } 742 743 static int ibmvfc_send_sub_crq(struct ibmvfc_host *vhost, u64 cookie, u64 word1, 744 u64 word2, u64 word3, u64 word4) 745 { 746 struct vio_dev *vdev = to_vio_dev(vhost->dev); 747 748 return plpar_hcall_norets(H_SEND_SUB_CRQ, vdev->unit_address, cookie, 749 word1, word2, word3, word4); 750 } 751 752 /** 753 * ibmvfc_send_crq_init - Send a CRQ init message 754 * @vhost: ibmvfc host struct 755 * 756 * Return value: 757 * 0 on success / other on failure 758 **/ 759 static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 760 { 761 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 762 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 763 } 764 765 /** 766 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 767 * @vhost: ibmvfc host struct 768 * 769 * Return value: 770 * 0 on success / other on failure 771 **/ 772 static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 773 { 774 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 775 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 776 } 777 778 /** 779 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 780 * @vhost: ibmvfc host who owns the event pool 781 * @queue: ibmvfc queue struct 782 * 783 * Returns zero on success. 784 **/ 785 static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost, 786 struct ibmvfc_queue *queue) 787 { 788 int i; 789 struct ibmvfc_event_pool *pool = &queue->evt_pool; 790 791 ENTER; 792 if (!queue->total_depth) 793 return 0; 794 795 pool->size = queue->total_depth; 796 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 797 if (!pool->events) 798 return -ENOMEM; 799 800 pool->iu_storage = dma_alloc_coherent(vhost->dev, 801 pool->size * sizeof(*pool->iu_storage), 802 &pool->iu_token, 0); 803 804 if (!pool->iu_storage) { 805 kfree(pool->events); 806 return -ENOMEM; 807 } 808 809 INIT_LIST_HEAD(&queue->sent); 810 INIT_LIST_HEAD(&queue->free); 811 queue->evt_free = queue->evt_depth; 812 queue->reserved_free = queue->reserved_depth; 813 spin_lock_init(&queue->l_lock); 814 815 for (i = 0; i < pool->size; ++i) { 816 struct ibmvfc_event *evt = &pool->events[i]; 817 818 /* 819 * evt->active states 820 * 1 = in flight 821 * 0 = being completed 822 * -1 = free/freed 823 */ 824 atomic_set(&evt->active, -1); 825 atomic_set(&evt->free, 1); 826 evt->crq.valid = 0x80; 827 evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i)); 828 evt->xfer_iu = pool->iu_storage + i; 829 evt->vhost = vhost; 830 evt->queue = queue; 831 evt->ext_list = NULL; 832 list_add_tail(&evt->queue_list, &queue->free); 833 } 834 835 LEAVE; 836 return 0; 837 } 838 839 /** 840 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 841 * @vhost: ibmvfc host who owns the event pool 842 * @queue: ibmvfc queue struct 843 * 844 **/ 845 static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost, 846 struct ibmvfc_queue *queue) 847 { 848 int i; 849 struct ibmvfc_event_pool *pool = &queue->evt_pool; 850 851 ENTER; 852 for (i = 0; i < pool->size; ++i) { 853 list_del(&pool->events[i].queue_list); 854 BUG_ON(atomic_read(&pool->events[i].free) != 1); 855 if (pool->events[i].ext_list) 856 dma_pool_free(vhost->sg_pool, 857 pool->events[i].ext_list, 858 pool->events[i].ext_list_token); 859 } 860 861 kfree(pool->events); 862 dma_free_coherent(vhost->dev, 863 pool->size * sizeof(*pool->iu_storage), 864 pool->iu_storage, pool->iu_token); 865 LEAVE; 866 } 867 868 /** 869 * ibmvfc_free_queue - Deallocate queue 870 * @vhost: ibmvfc host struct 871 * @queue: ibmvfc queue struct 872 * 873 * Unmaps dma and deallocates page for messages 874 **/ 875 static void ibmvfc_free_queue(struct ibmvfc_host *vhost, 876 struct ibmvfc_queue *queue) 877 { 878 struct device *dev = vhost->dev; 879 880 dma_unmap_single(dev, queue->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 881 free_page((unsigned long)queue->msgs.handle); 882 queue->msgs.handle = NULL; 883 884 ibmvfc_free_event_pool(vhost, queue); 885 } 886 887 /** 888 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 889 * @vhost: ibmvfc host struct 890 * 891 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 892 * the crq with the hypervisor. 893 **/ 894 static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 895 { 896 long rc = 0; 897 struct vio_dev *vdev = to_vio_dev(vhost->dev); 898 struct ibmvfc_queue *crq = &vhost->crq; 899 900 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 901 free_irq(vdev->irq, vhost); 902 tasklet_kill(&vhost->tasklet); 903 do { 904 if (rc) 905 msleep(100); 906 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 907 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 908 909 vhost->state = IBMVFC_NO_CRQ; 910 vhost->logged_in = 0; 911 912 ibmvfc_free_queue(vhost, crq); 913 } 914 915 /** 916 * ibmvfc_reenable_crq_queue - reenables the CRQ 917 * @vhost: ibmvfc host struct 918 * 919 * Return value: 920 * 0 on success / other on failure 921 **/ 922 static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 923 { 924 int rc = 0; 925 struct vio_dev *vdev = to_vio_dev(vhost->dev); 926 unsigned long flags; 927 928 ibmvfc_dereg_sub_crqs(vhost, &vhost->scsi_scrqs); 929 930 /* Re-enable the CRQ */ 931 do { 932 if (rc) 933 msleep(100); 934 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 935 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 936 937 if (rc) 938 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 939 940 spin_lock_irqsave(vhost->host->host_lock, flags); 941 spin_lock(vhost->crq.q_lock); 942 vhost->do_enquiry = 1; 943 vhost->using_channels = 0; 944 spin_unlock(vhost->crq.q_lock); 945 spin_unlock_irqrestore(vhost->host->host_lock, flags); 946 947 ibmvfc_reg_sub_crqs(vhost, &vhost->scsi_scrqs); 948 949 return rc; 950 } 951 952 /** 953 * ibmvfc_reset_crq - resets a crq after a failure 954 * @vhost: ibmvfc host struct 955 * 956 * Return value: 957 * 0 on success / other on failure 958 **/ 959 static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 960 { 961 int rc = 0; 962 unsigned long flags; 963 struct vio_dev *vdev = to_vio_dev(vhost->dev); 964 struct ibmvfc_queue *crq = &vhost->crq; 965 966 ibmvfc_dereg_sub_crqs(vhost, &vhost->scsi_scrqs); 967 968 /* Close the CRQ */ 969 do { 970 if (rc) 971 msleep(100); 972 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 973 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 974 975 spin_lock_irqsave(vhost->host->host_lock, flags); 976 spin_lock(vhost->crq.q_lock); 977 vhost->state = IBMVFC_NO_CRQ; 978 vhost->logged_in = 0; 979 vhost->do_enquiry = 1; 980 vhost->using_channels = 0; 981 982 /* Clean out the queue */ 983 memset(crq->msgs.crq, 0, PAGE_SIZE); 984 crq->cur = 0; 985 986 /* And re-open it again */ 987 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 988 crq->msg_token, PAGE_SIZE); 989 990 if (rc == H_CLOSED) 991 /* Adapter is good, but other end is not ready */ 992 dev_warn(vhost->dev, "Partner adapter not ready\n"); 993 else if (rc != 0) 994 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 995 996 spin_unlock(vhost->crq.q_lock); 997 spin_unlock_irqrestore(vhost->host->host_lock, flags); 998 999 ibmvfc_reg_sub_crqs(vhost, &vhost->scsi_scrqs); 1000 1001 return rc; 1002 } 1003 1004 /** 1005 * ibmvfc_valid_event - Determines if event is valid. 1006 * @pool: event_pool that contains the event 1007 * @evt: ibmvfc event to be checked for validity 1008 * 1009 * Return value: 1010 * 1 if event is valid / 0 if event is not valid 1011 **/ 1012 static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 1013 struct ibmvfc_event *evt) 1014 { 1015 int index = evt - pool->events; 1016 if (index < 0 || index >= pool->size) /* outside of bounds */ 1017 return 0; 1018 if (evt != pool->events + index) /* unaligned */ 1019 return 0; 1020 return 1; 1021 } 1022 1023 /** 1024 * ibmvfc_free_event - Free the specified event 1025 * @evt: ibmvfc_event to be freed 1026 * 1027 **/ 1028 static void ibmvfc_free_event(struct ibmvfc_event *evt) 1029 { 1030 struct ibmvfc_event_pool *pool = &evt->queue->evt_pool; 1031 unsigned long flags; 1032 1033 BUG_ON(!ibmvfc_valid_event(pool, evt)); 1034 BUG_ON(atomic_inc_return(&evt->free) != 1); 1035 BUG_ON(atomic_dec_and_test(&evt->active)); 1036 1037 spin_lock_irqsave(&evt->queue->l_lock, flags); 1038 list_add_tail(&evt->queue_list, &evt->queue->free); 1039 if (evt->reserved) { 1040 evt->reserved = 0; 1041 evt->queue->reserved_free++; 1042 } else { 1043 evt->queue->evt_free++; 1044 } 1045 if (evt->eh_comp) 1046 complete(evt->eh_comp); 1047 spin_unlock_irqrestore(&evt->queue->l_lock, flags); 1048 } 1049 1050 /** 1051 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 1052 * @evt: ibmvfc event struct 1053 * 1054 * This function does not setup any error status, that must be done 1055 * before this function gets called. 1056 **/ 1057 static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 1058 { 1059 struct scsi_cmnd *cmnd = evt->cmnd; 1060 1061 if (cmnd) { 1062 scsi_dma_unmap(cmnd); 1063 scsi_done(cmnd); 1064 } 1065 1066 ibmvfc_free_event(evt); 1067 } 1068 1069 /** 1070 * ibmvfc_complete_purge - Complete failed command list 1071 * @purge_list: list head of failed commands 1072 * 1073 * This function runs completions on commands to fail as a result of a 1074 * host reset or platform migration. 1075 **/ 1076 static void ibmvfc_complete_purge(struct list_head *purge_list) 1077 { 1078 struct ibmvfc_event *evt, *pos; 1079 1080 list_for_each_entry_safe(evt, pos, purge_list, queue_list) { 1081 list_del(&evt->queue_list); 1082 ibmvfc_trc_end(evt); 1083 evt->done(evt); 1084 } 1085 } 1086 1087 /** 1088 * ibmvfc_fail_request - Fail request with specified error code 1089 * @evt: ibmvfc event struct 1090 * @error_code: error code to fail request with 1091 * 1092 * Return value: 1093 * none 1094 **/ 1095 static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 1096 { 1097 /* 1098 * Anything we are failing should still be active. Otherwise, it 1099 * implies we already got a response for the command and are doing 1100 * something bad like double completing it. 1101 */ 1102 BUG_ON(!atomic_dec_and_test(&evt->active)); 1103 if (evt->cmnd) { 1104 evt->cmnd->result = (error_code << 16); 1105 evt->done = ibmvfc_scsi_eh_done; 1106 } else 1107 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED); 1108 1109 del_timer(&evt->timer); 1110 } 1111 1112 /** 1113 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 1114 * @vhost: ibmvfc host struct 1115 * @error_code: error code to fail requests with 1116 * 1117 * Return value: 1118 * none 1119 **/ 1120 static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 1121 { 1122 struct ibmvfc_event *evt, *pos; 1123 struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; 1124 unsigned long flags; 1125 int hwqs = 0; 1126 int i; 1127 1128 if (vhost->using_channels) 1129 hwqs = vhost->scsi_scrqs.active_queues; 1130 1131 ibmvfc_dbg(vhost, "Purging all requests\n"); 1132 spin_lock_irqsave(&vhost->crq.l_lock, flags); 1133 list_for_each_entry_safe(evt, pos, &vhost->crq.sent, queue_list) 1134 ibmvfc_fail_request(evt, error_code); 1135 list_splice_init(&vhost->crq.sent, &vhost->purge); 1136 spin_unlock_irqrestore(&vhost->crq.l_lock, flags); 1137 1138 for (i = 0; i < hwqs; i++) { 1139 spin_lock_irqsave(queues[i].q_lock, flags); 1140 spin_lock(&queues[i].l_lock); 1141 list_for_each_entry_safe(evt, pos, &queues[i].sent, queue_list) 1142 ibmvfc_fail_request(evt, error_code); 1143 list_splice_init(&queues[i].sent, &vhost->purge); 1144 spin_unlock(&queues[i].l_lock); 1145 spin_unlock_irqrestore(queues[i].q_lock, flags); 1146 } 1147 } 1148 1149 /** 1150 * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ 1151 * @vhost: struct ibmvfc host to reset 1152 **/ 1153 static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) 1154 { 1155 ibmvfc_purge_requests(vhost, DID_ERROR); 1156 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 1157 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 1158 } 1159 1160 /** 1161 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 1162 * @vhost: struct ibmvfc host to reset 1163 **/ 1164 static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 1165 { 1166 if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && 1167 !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 1168 scsi_block_requests(vhost->host); 1169 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); 1170 vhost->job_step = ibmvfc_npiv_logout; 1171 wake_up(&vhost->work_wait_q); 1172 } else 1173 ibmvfc_hard_reset_host(vhost); 1174 } 1175 1176 /** 1177 * ibmvfc_reset_host - Reset the connection to the server 1178 * @vhost: ibmvfc host struct 1179 **/ 1180 static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 1181 { 1182 unsigned long flags; 1183 1184 spin_lock_irqsave(vhost->host->host_lock, flags); 1185 __ibmvfc_reset_host(vhost); 1186 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1187 } 1188 1189 /** 1190 * ibmvfc_retry_host_init - Retry host initialization if allowed 1191 * @vhost: ibmvfc host struct 1192 * 1193 * Returns: 1 if init will be retried / 0 if not 1194 * 1195 **/ 1196 static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 1197 { 1198 int retry = 0; 1199 1200 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 1201 vhost->delay_init = 1; 1202 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 1203 dev_err(vhost->dev, 1204 "Host initialization retries exceeded. Taking adapter offline\n"); 1205 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 1206 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 1207 __ibmvfc_reset_host(vhost); 1208 else { 1209 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 1210 retry = 1; 1211 } 1212 } 1213 1214 wake_up(&vhost->work_wait_q); 1215 return retry; 1216 } 1217 1218 /** 1219 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 1220 * @starget: scsi target struct 1221 * 1222 * Return value: 1223 * ibmvfc_target struct / NULL if not found 1224 **/ 1225 static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 1226 { 1227 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 1228 struct ibmvfc_host *vhost = shost_priv(shost); 1229 struct ibmvfc_target *tgt; 1230 1231 list_for_each_entry(tgt, &vhost->targets, queue) 1232 if (tgt->target_id == starget->id) { 1233 kref_get(&tgt->kref); 1234 return tgt; 1235 } 1236 return NULL; 1237 } 1238 1239 /** 1240 * ibmvfc_get_target - Find the specified scsi_target 1241 * @starget: scsi target struct 1242 * 1243 * Return value: 1244 * ibmvfc_target struct / NULL if not found 1245 **/ 1246 static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 1247 { 1248 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 1249 struct ibmvfc_target *tgt; 1250 unsigned long flags; 1251 1252 spin_lock_irqsave(shost->host_lock, flags); 1253 tgt = __ibmvfc_get_target(starget); 1254 spin_unlock_irqrestore(shost->host_lock, flags); 1255 return tgt; 1256 } 1257 1258 /** 1259 * ibmvfc_get_host_speed - Get host port speed 1260 * @shost: scsi host struct 1261 * 1262 * Return value: 1263 * none 1264 **/ 1265 static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 1266 { 1267 struct ibmvfc_host *vhost = shost_priv(shost); 1268 unsigned long flags; 1269 1270 spin_lock_irqsave(shost->host_lock, flags); 1271 if (vhost->state == IBMVFC_ACTIVE) { 1272 switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) { 1273 case 1: 1274 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 1275 break; 1276 case 2: 1277 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 1278 break; 1279 case 4: 1280 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 1281 break; 1282 case 8: 1283 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 1284 break; 1285 case 10: 1286 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 1287 break; 1288 case 16: 1289 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 1290 break; 1291 default: 1292 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 1293 be64_to_cpu(vhost->login_buf->resp.link_speed) / 100); 1294 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 1295 break; 1296 } 1297 } else 1298 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 1299 spin_unlock_irqrestore(shost->host_lock, flags); 1300 } 1301 1302 /** 1303 * ibmvfc_get_host_port_state - Get host port state 1304 * @shost: scsi host struct 1305 * 1306 * Return value: 1307 * none 1308 **/ 1309 static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 1310 { 1311 struct ibmvfc_host *vhost = shost_priv(shost); 1312 unsigned long flags; 1313 1314 spin_lock_irqsave(shost->host_lock, flags); 1315 switch (vhost->state) { 1316 case IBMVFC_INITIALIZING: 1317 case IBMVFC_ACTIVE: 1318 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 1319 break; 1320 case IBMVFC_LINK_DOWN: 1321 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 1322 break; 1323 case IBMVFC_LINK_DEAD: 1324 case IBMVFC_HOST_OFFLINE: 1325 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 1326 break; 1327 case IBMVFC_HALTED: 1328 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 1329 break; 1330 case IBMVFC_NO_CRQ: 1331 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1332 break; 1333 default: 1334 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 1335 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 1336 break; 1337 } 1338 spin_unlock_irqrestore(shost->host_lock, flags); 1339 } 1340 1341 /** 1342 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 1343 * @rport: rport struct 1344 * @timeout: timeout value 1345 * 1346 * Return value: 1347 * none 1348 **/ 1349 static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 1350 { 1351 if (timeout) 1352 rport->dev_loss_tmo = timeout; 1353 else 1354 rport->dev_loss_tmo = 1; 1355 } 1356 1357 /** 1358 * ibmvfc_release_tgt - Free memory allocated for a target 1359 * @kref: kref struct 1360 * 1361 **/ 1362 static void ibmvfc_release_tgt(struct kref *kref) 1363 { 1364 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1365 kfree(tgt); 1366 } 1367 1368 /** 1369 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1370 * @starget: scsi target struct 1371 * 1372 * Return value: 1373 * none 1374 **/ 1375 static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1376 { 1377 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1378 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1379 if (tgt) 1380 kref_put(&tgt->kref, ibmvfc_release_tgt); 1381 } 1382 1383 /** 1384 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1385 * @starget: scsi target struct 1386 * 1387 * Return value: 1388 * none 1389 **/ 1390 static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1391 { 1392 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1393 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1394 if (tgt) 1395 kref_put(&tgt->kref, ibmvfc_release_tgt); 1396 } 1397 1398 /** 1399 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1400 * @starget: scsi target struct 1401 * 1402 * Return value: 1403 * none 1404 **/ 1405 static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1406 { 1407 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1408 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1409 if (tgt) 1410 kref_put(&tgt->kref, ibmvfc_release_tgt); 1411 } 1412 1413 /** 1414 * ibmvfc_wait_while_resetting - Wait while the host resets 1415 * @vhost: ibmvfc host struct 1416 * 1417 * Return value: 1418 * 0 on success / other on failure 1419 **/ 1420 static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1421 { 1422 long timeout = wait_event_timeout(vhost->init_wait_q, 1423 ((vhost->state == IBMVFC_ACTIVE || 1424 vhost->state == IBMVFC_HOST_OFFLINE || 1425 vhost->state == IBMVFC_LINK_DEAD) && 1426 vhost->action == IBMVFC_HOST_ACTION_NONE), 1427 (init_timeout * HZ)); 1428 1429 return timeout ? 0 : -EIO; 1430 } 1431 1432 /** 1433 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1434 * @shost: scsi host struct 1435 * 1436 * Return value: 1437 * 0 on success / other on failure 1438 **/ 1439 static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1440 { 1441 struct ibmvfc_host *vhost = shost_priv(shost); 1442 1443 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1444 ibmvfc_reset_host(vhost); 1445 return ibmvfc_wait_while_resetting(vhost); 1446 } 1447 1448 /** 1449 * ibmvfc_gather_partition_info - Gather info about the LPAR 1450 * @vhost: ibmvfc host struct 1451 * 1452 * Return value: 1453 * none 1454 **/ 1455 static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1456 { 1457 struct device_node *rootdn; 1458 const char *name; 1459 const unsigned int *num; 1460 1461 rootdn = of_find_node_by_path("/"); 1462 if (!rootdn) 1463 return; 1464 1465 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1466 if (name) 1467 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1468 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1469 if (num) 1470 vhost->partition_number = *num; 1471 of_node_put(rootdn); 1472 } 1473 1474 /** 1475 * ibmvfc_set_login_info - Setup info for NPIV login 1476 * @vhost: ibmvfc host struct 1477 * 1478 * Return value: 1479 * none 1480 **/ 1481 static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1482 { 1483 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1484 struct ibmvfc_queue *async_crq = &vhost->async_crq; 1485 struct device_node *of_node = vhost->dev->of_node; 1486 const char *location; 1487 u16 max_cmds; 1488 1489 max_cmds = scsi_qdepth + IBMVFC_NUM_INTERNAL_REQ; 1490 if (mq_enabled) 1491 max_cmds += (scsi_qdepth + IBMVFC_NUM_INTERNAL_SUBQ_REQ) * 1492 vhost->scsi_scrqs.desired_queues; 1493 1494 memset(login_info, 0, sizeof(*login_info)); 1495 1496 login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX); 1497 login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); 1498 login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); 1499 login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); 1500 login_info->partition_num = cpu_to_be32(vhost->partition_number); 1501 login_info->vfc_frame_version = cpu_to_be32(1); 1502 login_info->fcp_version = cpu_to_be16(3); 1503 login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); 1504 if (vhost->client_migrated) 1505 login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); 1506 1507 login_info->max_cmds = cpu_to_be32(max_cmds); 1508 login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE | IBMVFC_CAN_SEND_VF_WWPN); 1509 1510 if (vhost->mq_enabled || vhost->using_channels) 1511 login_info->capabilities |= cpu_to_be64(IBMVFC_CAN_USE_CHANNELS); 1512 1513 login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); 1514 login_info->async.len = cpu_to_be32(async_crq->size * 1515 sizeof(*async_crq->msgs.async)); 1516 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1517 strncpy(login_info->device_name, 1518 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1519 1520 location = of_get_property(of_node, "ibm,loc-code", NULL); 1521 location = location ? location : dev_name(vhost->dev); 1522 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1523 } 1524 1525 /** 1526 * __ibmvfc_get_event - Gets the next free event in pool 1527 * @queue: ibmvfc queue struct 1528 * @reserved: event is for a reserved management command 1529 * 1530 * Returns a free event from the pool. 1531 **/ 1532 static struct ibmvfc_event *__ibmvfc_get_event(struct ibmvfc_queue *queue, int reserved) 1533 { 1534 struct ibmvfc_event *evt = NULL; 1535 unsigned long flags; 1536 1537 spin_lock_irqsave(&queue->l_lock, flags); 1538 if (reserved && queue->reserved_free) { 1539 evt = list_entry(queue->free.next, struct ibmvfc_event, queue_list); 1540 evt->reserved = 1; 1541 queue->reserved_free--; 1542 } else if (queue->evt_free) { 1543 evt = list_entry(queue->free.next, struct ibmvfc_event, queue_list); 1544 queue->evt_free--; 1545 } else { 1546 goto out; 1547 } 1548 1549 atomic_set(&evt->free, 0); 1550 list_del(&evt->queue_list); 1551 out: 1552 spin_unlock_irqrestore(&queue->l_lock, flags); 1553 return evt; 1554 } 1555 1556 #define ibmvfc_get_event(queue) __ibmvfc_get_event(queue, 0) 1557 #define ibmvfc_get_reserved_event(queue) __ibmvfc_get_event(queue, 1) 1558 1559 /** 1560 * ibmvfc_locked_done - Calls evt completion with host_lock held 1561 * @evt: ibmvfc evt to complete 1562 * 1563 * All non-scsi command completion callbacks have the expectation that the 1564 * host_lock is held. This callback is used by ibmvfc_init_event to wrap a 1565 * MAD evt with the host_lock. 1566 **/ 1567 static void ibmvfc_locked_done(struct ibmvfc_event *evt) 1568 { 1569 unsigned long flags; 1570 1571 spin_lock_irqsave(evt->vhost->host->host_lock, flags); 1572 evt->_done(evt); 1573 spin_unlock_irqrestore(evt->vhost->host->host_lock, flags); 1574 } 1575 1576 /** 1577 * ibmvfc_init_event - Initialize fields in an event struct that are always 1578 * required. 1579 * @evt: The event 1580 * @done: Routine to call when the event is responded to 1581 * @format: SRP or MAD format 1582 **/ 1583 static void ibmvfc_init_event(struct ibmvfc_event *evt, 1584 void (*done) (struct ibmvfc_event *), u8 format) 1585 { 1586 evt->cmnd = NULL; 1587 evt->sync_iu = NULL; 1588 evt->eh_comp = NULL; 1589 evt->crq.format = format; 1590 if (format == IBMVFC_CMD_FORMAT) 1591 evt->done = done; 1592 else { 1593 evt->_done = done; 1594 evt->done = ibmvfc_locked_done; 1595 } 1596 evt->hwq = 0; 1597 } 1598 1599 /** 1600 * ibmvfc_map_sg_list - Initialize scatterlist 1601 * @scmd: scsi command struct 1602 * @nseg: number of scatterlist segments 1603 * @md: memory descriptor list to initialize 1604 **/ 1605 static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1606 struct srp_direct_buf *md) 1607 { 1608 int i; 1609 struct scatterlist *sg; 1610 1611 scsi_for_each_sg(scmd, sg, nseg, i) { 1612 md[i].va = cpu_to_be64(sg_dma_address(sg)); 1613 md[i].len = cpu_to_be32(sg_dma_len(sg)); 1614 md[i].key = 0; 1615 } 1616 } 1617 1618 /** 1619 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes descriptor fields 1620 * @scmd: struct scsi_cmnd with the scatterlist 1621 * @evt: ibmvfc event struct 1622 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1623 * @dev: device for which to map dma memory 1624 * 1625 * Returns: 1626 * 0 on success / non-zero on failure 1627 **/ 1628 static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1629 struct ibmvfc_event *evt, 1630 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1631 { 1632 1633 int sg_mapped; 1634 struct srp_direct_buf *data = &vfc_cmd->ioba; 1635 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1636 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(evt->vhost, vfc_cmd); 1637 1638 if (cls3_error) 1639 vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR); 1640 1641 sg_mapped = scsi_dma_map(scmd); 1642 if (!sg_mapped) { 1643 vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC); 1644 return 0; 1645 } else if (unlikely(sg_mapped < 0)) { 1646 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1647 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1648 return sg_mapped; 1649 } 1650 1651 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1652 vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE); 1653 iu->add_cdb_len |= IBMVFC_WRDATA; 1654 } else { 1655 vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ); 1656 iu->add_cdb_len |= IBMVFC_RDDATA; 1657 } 1658 1659 if (sg_mapped == 1) { 1660 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1661 return 0; 1662 } 1663 1664 vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST); 1665 1666 if (!evt->ext_list) { 1667 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1668 &evt->ext_list_token); 1669 1670 if (!evt->ext_list) { 1671 scsi_dma_unmap(scmd); 1672 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1673 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1674 return -ENOMEM; 1675 } 1676 } 1677 1678 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1679 1680 data->va = cpu_to_be64(evt->ext_list_token); 1681 data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf)); 1682 data->key = 0; 1683 return 0; 1684 } 1685 1686 /** 1687 * ibmvfc_timeout - Internal command timeout handler 1688 * @t: struct ibmvfc_event that timed out 1689 * 1690 * Called when an internally generated command times out 1691 **/ 1692 static void ibmvfc_timeout(struct timer_list *t) 1693 { 1694 struct ibmvfc_event *evt = from_timer(evt, t, timer); 1695 struct ibmvfc_host *vhost = evt->vhost; 1696 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1697 ibmvfc_reset_host(vhost); 1698 } 1699 1700 /** 1701 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1702 * @evt: event to be sent 1703 * @vhost: ibmvfc host struct 1704 * @timeout: timeout in seconds - 0 means do not time command 1705 * 1706 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1707 **/ 1708 static int ibmvfc_send_event(struct ibmvfc_event *evt, 1709 struct ibmvfc_host *vhost, unsigned long timeout) 1710 { 1711 __be64 *crq_as_u64 = (__be64 *) &evt->crq; 1712 unsigned long flags; 1713 int rc; 1714 1715 /* Copy the IU into the transfer area */ 1716 *evt->xfer_iu = evt->iu; 1717 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1718 evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); 1719 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1720 evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); 1721 else 1722 BUG(); 1723 1724 timer_setup(&evt->timer, ibmvfc_timeout, 0); 1725 1726 if (timeout) { 1727 evt->timer.expires = jiffies + (timeout * HZ); 1728 add_timer(&evt->timer); 1729 } 1730 1731 spin_lock_irqsave(&evt->queue->l_lock, flags); 1732 list_add_tail(&evt->queue_list, &evt->queue->sent); 1733 atomic_set(&evt->active, 1); 1734 1735 mb(); 1736 1737 if (evt->queue->fmt == IBMVFC_SUB_CRQ_FMT) 1738 rc = ibmvfc_send_sub_crq(vhost, 1739 evt->queue->vios_cookie, 1740 be64_to_cpu(crq_as_u64[0]), 1741 be64_to_cpu(crq_as_u64[1]), 1742 0, 0); 1743 else 1744 rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), 1745 be64_to_cpu(crq_as_u64[1])); 1746 1747 if (rc) { 1748 atomic_set(&evt->active, 0); 1749 list_del(&evt->queue_list); 1750 spin_unlock_irqrestore(&evt->queue->l_lock, flags); 1751 del_timer(&evt->timer); 1752 1753 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1754 * Firmware will send a CRQ with a transport event (0xFF) to 1755 * tell this client what has happened to the transport. This 1756 * will be handled in ibmvfc_handle_crq() 1757 */ 1758 if (rc == H_CLOSED) { 1759 if (printk_ratelimit()) 1760 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1761 if (evt->cmnd) 1762 scsi_dma_unmap(evt->cmnd); 1763 ibmvfc_free_event(evt); 1764 return SCSI_MLQUEUE_HOST_BUSY; 1765 } 1766 1767 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1768 if (evt->cmnd) { 1769 evt->cmnd->result = DID_ERROR << 16; 1770 evt->done = ibmvfc_scsi_eh_done; 1771 } else 1772 evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); 1773 1774 evt->done(evt); 1775 } else { 1776 spin_unlock_irqrestore(&evt->queue->l_lock, flags); 1777 ibmvfc_trc_start(evt); 1778 } 1779 1780 return 0; 1781 } 1782 1783 /** 1784 * ibmvfc_log_error - Log an error for the failed command if appropriate 1785 * @evt: ibmvfc event to log 1786 * 1787 **/ 1788 static void ibmvfc_log_error(struct ibmvfc_event *evt) 1789 { 1790 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1791 struct ibmvfc_host *vhost = evt->vhost; 1792 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 1793 struct scsi_cmnd *cmnd = evt->cmnd; 1794 const char *err = unknown_error; 1795 int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); 1796 int logerr = 0; 1797 int rsp_code = 0; 1798 1799 if (index >= 0) { 1800 logerr = cmd_status[index].log; 1801 err = cmd_status[index].name; 1802 } 1803 1804 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1805 return; 1806 1807 if (rsp->flags & FCP_RSP_LEN_VALID) 1808 rsp_code = rsp->data.info.rsp_code; 1809 1810 scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) " 1811 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1812 cmnd->cmnd[0], err, be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error), 1813 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1814 } 1815 1816 /** 1817 * ibmvfc_relogin - Log back into the specified device 1818 * @sdev: scsi device struct 1819 * 1820 **/ 1821 static void ibmvfc_relogin(struct scsi_device *sdev) 1822 { 1823 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1824 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1825 struct ibmvfc_target *tgt; 1826 unsigned long flags; 1827 1828 spin_lock_irqsave(vhost->host->host_lock, flags); 1829 list_for_each_entry(tgt, &vhost->targets, queue) { 1830 if (rport == tgt->rport) { 1831 ibmvfc_del_tgt(tgt); 1832 break; 1833 } 1834 } 1835 1836 ibmvfc_reinit_host(vhost); 1837 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1838 } 1839 1840 /** 1841 * ibmvfc_scsi_done - Handle responses from commands 1842 * @evt: ibmvfc event to be handled 1843 * 1844 * Used as a callback when sending scsi cmds. 1845 **/ 1846 static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1847 { 1848 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1849 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(evt->vhost, vfc_cmd); 1850 struct scsi_cmnd *cmnd = evt->cmnd; 1851 u32 rsp_len = 0; 1852 u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); 1853 1854 if (cmnd) { 1855 if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) 1856 scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); 1857 else if (rsp->flags & FCP_RESID_UNDER) 1858 scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); 1859 else 1860 scsi_set_resid(cmnd, 0); 1861 1862 if (vfc_cmd->status) { 1863 cmnd->result = ibmvfc_get_err_result(evt->vhost, vfc_cmd); 1864 1865 if (rsp->flags & FCP_RSP_LEN_VALID) 1866 rsp_len = be32_to_cpu(rsp->fcp_rsp_len); 1867 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1868 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1869 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1870 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1871 if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && 1872 (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) 1873 ibmvfc_relogin(cmnd->device); 1874 1875 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1876 cmnd->result = (DID_ERROR << 16); 1877 1878 ibmvfc_log_error(evt); 1879 } 1880 1881 if (!cmnd->result && 1882 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1883 cmnd->result = (DID_ERROR << 16); 1884 1885 scsi_dma_unmap(cmnd); 1886 scsi_done(cmnd); 1887 } 1888 1889 ibmvfc_free_event(evt); 1890 } 1891 1892 /** 1893 * ibmvfc_host_chkready - Check if the host can accept commands 1894 * @vhost: struct ibmvfc host 1895 * 1896 * Returns: 1897 * 1 if host can accept command / 0 if not 1898 **/ 1899 static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1900 { 1901 int result = 0; 1902 1903 switch (vhost->state) { 1904 case IBMVFC_LINK_DEAD: 1905 case IBMVFC_HOST_OFFLINE: 1906 result = DID_NO_CONNECT << 16; 1907 break; 1908 case IBMVFC_NO_CRQ: 1909 case IBMVFC_INITIALIZING: 1910 case IBMVFC_HALTED: 1911 case IBMVFC_LINK_DOWN: 1912 result = DID_REQUEUE << 16; 1913 break; 1914 case IBMVFC_ACTIVE: 1915 result = 0; 1916 break; 1917 } 1918 1919 return result; 1920 } 1921 1922 static struct ibmvfc_cmd *ibmvfc_init_vfc_cmd(struct ibmvfc_event *evt, struct scsi_device *sdev) 1923 { 1924 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1925 struct ibmvfc_host *vhost = evt->vhost; 1926 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 1927 struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 1928 struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); 1929 size_t offset; 1930 1931 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1932 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 1933 offset = offsetof(struct ibmvfc_cmd, v2.rsp); 1934 vfc_cmd->target_wwpn = cpu_to_be64(rport->port_name); 1935 } else 1936 offset = offsetof(struct ibmvfc_cmd, v1.rsp); 1937 vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offset); 1938 vfc_cmd->resp.len = cpu_to_be32(sizeof(*rsp)); 1939 vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); 1940 vfc_cmd->payload_len = cpu_to_be32(sizeof(*iu)); 1941 vfc_cmd->resp_len = cpu_to_be32(sizeof(*rsp)); 1942 vfc_cmd->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 1943 vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); 1944 int_to_scsilun(sdev->lun, &iu->lun); 1945 1946 return vfc_cmd; 1947 } 1948 1949 /** 1950 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1951 * @shost: scsi host struct 1952 * @cmnd: struct scsi_cmnd to be executed 1953 * 1954 * Returns: 1955 * 0 on success / other on failure 1956 **/ 1957 static int ibmvfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) 1958 { 1959 struct ibmvfc_host *vhost = shost_priv(shost); 1960 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1961 struct ibmvfc_cmd *vfc_cmd; 1962 struct ibmvfc_fcp_cmd_iu *iu; 1963 struct ibmvfc_event *evt; 1964 u32 tag_and_hwq = blk_mq_unique_tag(scsi_cmd_to_rq(cmnd)); 1965 u16 hwq = blk_mq_unique_tag_to_hwq(tag_and_hwq); 1966 u16 scsi_channel; 1967 int rc; 1968 1969 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1970 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1971 cmnd->result = rc; 1972 scsi_done(cmnd); 1973 return 0; 1974 } 1975 1976 cmnd->result = (DID_OK << 16); 1977 if (vhost->using_channels) { 1978 scsi_channel = hwq % vhost->scsi_scrqs.active_queues; 1979 evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[scsi_channel]); 1980 if (!evt) 1981 return SCSI_MLQUEUE_HOST_BUSY; 1982 1983 evt->hwq = hwq % vhost->scsi_scrqs.active_queues; 1984 } else { 1985 evt = ibmvfc_get_event(&vhost->crq); 1986 if (!evt) 1987 return SCSI_MLQUEUE_HOST_BUSY; 1988 } 1989 1990 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1991 evt->cmnd = cmnd; 1992 1993 vfc_cmd = ibmvfc_init_vfc_cmd(evt, cmnd->device); 1994 iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); 1995 1996 iu->xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); 1997 memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); 1998 1999 if (cmnd->flags & SCMD_TAGGED) { 2000 vfc_cmd->task_tag = cpu_to_be64(scsi_cmd_to_rq(cmnd)->tag); 2001 iu->pri_task_attr = IBMVFC_SIMPLE_TASK; 2002 } 2003 2004 vfc_cmd->correlation = cpu_to_be64((u64)evt); 2005 2006 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 2007 return ibmvfc_send_event(evt, vhost, 0); 2008 2009 ibmvfc_free_event(evt); 2010 if (rc == -ENOMEM) 2011 return SCSI_MLQUEUE_HOST_BUSY; 2012 2013 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2014 scmd_printk(KERN_ERR, cmnd, 2015 "Failed to map DMA buffer for command. rc=%d\n", rc); 2016 2017 cmnd->result = DID_ERROR << 16; 2018 scsi_done(cmnd); 2019 return 0; 2020 } 2021 2022 /** 2023 * ibmvfc_sync_completion - Signal that a synchronous command has completed 2024 * @evt: ibmvfc event struct 2025 * 2026 **/ 2027 static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 2028 { 2029 /* copy the response back */ 2030 if (evt->sync_iu) 2031 *evt->sync_iu = *evt->xfer_iu; 2032 2033 complete(&evt->comp); 2034 } 2035 2036 /** 2037 * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands 2038 * @evt: struct ibmvfc_event 2039 * 2040 **/ 2041 static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) 2042 { 2043 struct ibmvfc_host *vhost = evt->vhost; 2044 2045 ibmvfc_free_event(evt); 2046 vhost->aborting_passthru = 0; 2047 dev_info(vhost->dev, "Passthru command cancelled\n"); 2048 } 2049 2050 /** 2051 * ibmvfc_bsg_timeout - Handle a BSG timeout 2052 * @job: struct bsg_job that timed out 2053 * 2054 * Returns: 2055 * 0 on success / other on failure 2056 **/ 2057 static int ibmvfc_bsg_timeout(struct bsg_job *job) 2058 { 2059 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 2060 unsigned long port_id = (unsigned long)job->dd_data; 2061 struct ibmvfc_event *evt; 2062 struct ibmvfc_tmf *tmf; 2063 unsigned long flags; 2064 int rc; 2065 2066 ENTER; 2067 spin_lock_irqsave(vhost->host->host_lock, flags); 2068 if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { 2069 __ibmvfc_reset_host(vhost); 2070 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2071 return 0; 2072 } 2073 2074 vhost->aborting_passthru = 1; 2075 evt = ibmvfc_get_reserved_event(&vhost->crq); 2076 if (!evt) { 2077 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2078 return -ENOMEM; 2079 } 2080 2081 ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); 2082 2083 tmf = &evt->iu.tmf; 2084 memset(tmf, 0, sizeof(*tmf)); 2085 tmf->common.version = cpu_to_be32(1); 2086 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2087 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2088 tmf->scsi_id = cpu_to_be64(port_id); 2089 tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 2090 tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); 2091 rc = ibmvfc_send_event(evt, vhost, default_timeout); 2092 2093 if (rc != 0) { 2094 vhost->aborting_passthru = 0; 2095 dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); 2096 rc = -EIO; 2097 } else 2098 dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", 2099 port_id); 2100 2101 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2102 2103 LEAVE; 2104 return rc; 2105 } 2106 2107 /** 2108 * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command 2109 * @vhost: struct ibmvfc_host to send command 2110 * @port_id: port ID to send command 2111 * 2112 * Returns: 2113 * 0 on success / other on failure 2114 **/ 2115 static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) 2116 { 2117 struct ibmvfc_port_login *plogi; 2118 struct ibmvfc_target *tgt; 2119 struct ibmvfc_event *evt; 2120 union ibmvfc_iu rsp_iu; 2121 unsigned long flags; 2122 int rc = 0, issue_login = 1; 2123 2124 ENTER; 2125 spin_lock_irqsave(vhost->host->host_lock, flags); 2126 list_for_each_entry(tgt, &vhost->targets, queue) { 2127 if (tgt->scsi_id == port_id) { 2128 issue_login = 0; 2129 break; 2130 } 2131 } 2132 2133 if (!issue_login) 2134 goto unlock_out; 2135 if (unlikely((rc = ibmvfc_host_chkready(vhost)))) 2136 goto unlock_out; 2137 2138 evt = ibmvfc_get_reserved_event(&vhost->crq); 2139 if (!evt) { 2140 rc = -ENOMEM; 2141 goto unlock_out; 2142 } 2143 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2144 plogi = &evt->iu.plogi; 2145 memset(plogi, 0, sizeof(*plogi)); 2146 plogi->common.version = cpu_to_be32(1); 2147 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 2148 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 2149 plogi->scsi_id = cpu_to_be64(port_id); 2150 evt->sync_iu = &rsp_iu; 2151 init_completion(&evt->comp); 2152 2153 rc = ibmvfc_send_event(evt, vhost, default_timeout); 2154 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2155 2156 if (rc) 2157 return -EIO; 2158 2159 wait_for_completion(&evt->comp); 2160 2161 if (rsp_iu.plogi.common.status) 2162 rc = -EIO; 2163 2164 spin_lock_irqsave(vhost->host->host_lock, flags); 2165 ibmvfc_free_event(evt); 2166 unlock_out: 2167 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2168 LEAVE; 2169 return rc; 2170 } 2171 2172 /** 2173 * ibmvfc_bsg_request - Handle a BSG request 2174 * @job: struct bsg_job to be executed 2175 * 2176 * Returns: 2177 * 0 on success / other on failure 2178 **/ 2179 static int ibmvfc_bsg_request(struct bsg_job *job) 2180 { 2181 struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); 2182 struct fc_rport *rport = fc_bsg_to_rport(job); 2183 struct ibmvfc_passthru_mad *mad; 2184 struct ibmvfc_event *evt; 2185 union ibmvfc_iu rsp_iu; 2186 unsigned long flags, port_id = -1; 2187 struct fc_bsg_request *bsg_request = job->request; 2188 struct fc_bsg_reply *bsg_reply = job->reply; 2189 unsigned int code = bsg_request->msgcode; 2190 int rc = 0, req_seg, rsp_seg, issue_login = 0; 2191 u32 fc_flags, rsp_len; 2192 2193 ENTER; 2194 bsg_reply->reply_payload_rcv_len = 0; 2195 if (rport) 2196 port_id = rport->port_id; 2197 2198 switch (code) { 2199 case FC_BSG_HST_ELS_NOLOGIN: 2200 port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) | 2201 (bsg_request->rqst_data.h_els.port_id[1] << 8) | 2202 bsg_request->rqst_data.h_els.port_id[2]; 2203 fallthrough; 2204 case FC_BSG_RPT_ELS: 2205 fc_flags = IBMVFC_FC_ELS; 2206 break; 2207 case FC_BSG_HST_CT: 2208 issue_login = 1; 2209 port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) | 2210 (bsg_request->rqst_data.h_ct.port_id[1] << 8) | 2211 bsg_request->rqst_data.h_ct.port_id[2]; 2212 fallthrough; 2213 case FC_BSG_RPT_CT: 2214 fc_flags = IBMVFC_FC_CT_IU; 2215 break; 2216 default: 2217 return -ENOTSUPP; 2218 } 2219 2220 if (port_id == -1) 2221 return -EINVAL; 2222 if (!mutex_trylock(&vhost->passthru_mutex)) 2223 return -EBUSY; 2224 2225 job->dd_data = (void *)port_id; 2226 req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, 2227 job->request_payload.sg_cnt, DMA_TO_DEVICE); 2228 2229 if (!req_seg) { 2230 mutex_unlock(&vhost->passthru_mutex); 2231 return -ENOMEM; 2232 } 2233 2234 rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, 2235 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 2236 2237 if (!rsp_seg) { 2238 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 2239 job->request_payload.sg_cnt, DMA_TO_DEVICE); 2240 mutex_unlock(&vhost->passthru_mutex); 2241 return -ENOMEM; 2242 } 2243 2244 if (req_seg > 1 || rsp_seg > 1) { 2245 rc = -EINVAL; 2246 goto out; 2247 } 2248 2249 if (issue_login) 2250 rc = ibmvfc_bsg_plogi(vhost, port_id); 2251 2252 spin_lock_irqsave(vhost->host->host_lock, flags); 2253 2254 if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || 2255 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 2256 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2257 goto out; 2258 } 2259 2260 evt = ibmvfc_get_reserved_event(&vhost->crq); 2261 if (!evt) { 2262 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2263 rc = -ENOMEM; 2264 goto out; 2265 } 2266 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2267 mad = &evt->iu.passthru; 2268 2269 memset(mad, 0, sizeof(*mad)); 2270 mad->common.version = cpu_to_be32(1); 2271 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 2272 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 2273 2274 mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + 2275 offsetof(struct ibmvfc_passthru_mad, iu)); 2276 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 2277 2278 mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); 2279 mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); 2280 mad->iu.flags = cpu_to_be32(fc_flags); 2281 mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); 2282 2283 mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); 2284 mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); 2285 mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); 2286 mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); 2287 mad->iu.scsi_id = cpu_to_be64(port_id); 2288 mad->iu.tag = cpu_to_be64((u64)evt); 2289 rsp_len = be32_to_cpu(mad->iu.rsp.len); 2290 2291 evt->sync_iu = &rsp_iu; 2292 init_completion(&evt->comp); 2293 rc = ibmvfc_send_event(evt, vhost, 0); 2294 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2295 2296 if (rc) { 2297 rc = -EIO; 2298 goto out; 2299 } 2300 2301 wait_for_completion(&evt->comp); 2302 2303 if (rsp_iu.passthru.common.status) 2304 rc = -EIO; 2305 else 2306 bsg_reply->reply_payload_rcv_len = rsp_len; 2307 2308 spin_lock_irqsave(vhost->host->host_lock, flags); 2309 ibmvfc_free_event(evt); 2310 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2311 bsg_reply->result = rc; 2312 bsg_job_done(job, bsg_reply->result, 2313 bsg_reply->reply_payload_rcv_len); 2314 rc = 0; 2315 out: 2316 dma_unmap_sg(vhost->dev, job->request_payload.sg_list, 2317 job->request_payload.sg_cnt, DMA_TO_DEVICE); 2318 dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, 2319 job->reply_payload.sg_cnt, DMA_FROM_DEVICE); 2320 mutex_unlock(&vhost->passthru_mutex); 2321 LEAVE; 2322 return rc; 2323 } 2324 2325 /** 2326 * ibmvfc_reset_device - Reset the device with the specified reset type 2327 * @sdev: scsi device to reset 2328 * @type: reset type 2329 * @desc: reset type description for log messages 2330 * 2331 * Returns: 2332 * 0 on success / other on failure 2333 **/ 2334 static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 2335 { 2336 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2337 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2338 struct ibmvfc_cmd *tmf; 2339 struct ibmvfc_event *evt = NULL; 2340 union ibmvfc_iu rsp_iu; 2341 struct ibmvfc_fcp_cmd_iu *iu; 2342 struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); 2343 int rsp_rc = -EBUSY; 2344 unsigned long flags; 2345 int rsp_code = 0; 2346 2347 spin_lock_irqsave(vhost->host->host_lock, flags); 2348 if (vhost->state == IBMVFC_ACTIVE) { 2349 if (vhost->using_channels) 2350 evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[0]); 2351 else 2352 evt = ibmvfc_get_event(&vhost->crq); 2353 2354 if (!evt) { 2355 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2356 return -ENOMEM; 2357 } 2358 2359 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2360 tmf = ibmvfc_init_vfc_cmd(evt, sdev); 2361 iu = ibmvfc_get_fcp_iu(vhost, tmf); 2362 2363 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2364 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 2365 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2366 iu->tmf_flags = type; 2367 evt->sync_iu = &rsp_iu; 2368 2369 init_completion(&evt->comp); 2370 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2371 } 2372 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2373 2374 if (rsp_rc != 0) { 2375 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 2376 desc, rsp_rc); 2377 return -EIO; 2378 } 2379 2380 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 2381 wait_for_completion(&evt->comp); 2382 2383 if (rsp_iu.cmd.status) 2384 rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); 2385 2386 if (rsp_code) { 2387 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2388 rsp_code = fc_rsp->data.info.rsp_code; 2389 2390 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 2391 "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, 2392 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2393 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, 2394 fc_rsp->scsi_status); 2395 rsp_rc = -EIO; 2396 } else 2397 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 2398 2399 spin_lock_irqsave(vhost->host->host_lock, flags); 2400 ibmvfc_free_event(evt); 2401 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2402 return rsp_rc; 2403 } 2404 2405 /** 2406 * ibmvfc_match_rport - Match function for specified remote port 2407 * @evt: ibmvfc event struct 2408 * @rport: device to match 2409 * 2410 * Returns: 2411 * 1 if event matches rport / 0 if event does not match rport 2412 **/ 2413 static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) 2414 { 2415 struct fc_rport *cmd_rport; 2416 2417 if (evt->cmnd) { 2418 cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); 2419 if (cmd_rport == rport) 2420 return 1; 2421 } 2422 return 0; 2423 } 2424 2425 /** 2426 * ibmvfc_match_target - Match function for specified target 2427 * @evt: ibmvfc event struct 2428 * @device: device to match (starget) 2429 * 2430 * Returns: 2431 * 1 if event matches starget / 0 if event does not match starget 2432 **/ 2433 static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 2434 { 2435 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 2436 return 1; 2437 return 0; 2438 } 2439 2440 /** 2441 * ibmvfc_match_lun - Match function for specified LUN 2442 * @evt: ibmvfc event struct 2443 * @device: device to match (sdev) 2444 * 2445 * Returns: 2446 * 1 if event matches sdev / 0 if event does not match sdev 2447 **/ 2448 static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 2449 { 2450 if (evt->cmnd && evt->cmnd->device == device) 2451 return 1; 2452 return 0; 2453 } 2454 2455 /** 2456 * ibmvfc_event_is_free - Check if event is free or not 2457 * @evt: ibmvfc event struct 2458 * 2459 * Returns: 2460 * true / false 2461 **/ 2462 static bool ibmvfc_event_is_free(struct ibmvfc_event *evt) 2463 { 2464 struct ibmvfc_event *loop_evt; 2465 2466 list_for_each_entry(loop_evt, &evt->queue->free, queue_list) 2467 if (loop_evt == evt) 2468 return true; 2469 2470 return false; 2471 } 2472 2473 /** 2474 * ibmvfc_wait_for_ops - Wait for ops to complete 2475 * @vhost: ibmvfc host struct 2476 * @device: device to match (starget or sdev) 2477 * @match: match function 2478 * 2479 * Returns: 2480 * SUCCESS / FAILED 2481 **/ 2482 static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 2483 int (*match) (struct ibmvfc_event *, void *)) 2484 { 2485 struct ibmvfc_event *evt; 2486 DECLARE_COMPLETION_ONSTACK(comp); 2487 int wait, i, q_index, q_size; 2488 unsigned long flags; 2489 signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; 2490 struct ibmvfc_queue *queues; 2491 2492 ENTER; 2493 if (vhost->mq_enabled && vhost->using_channels) { 2494 queues = vhost->scsi_scrqs.scrqs; 2495 q_size = vhost->scsi_scrqs.active_queues; 2496 } else { 2497 queues = &vhost->crq; 2498 q_size = 1; 2499 } 2500 2501 do { 2502 wait = 0; 2503 spin_lock_irqsave(vhost->host->host_lock, flags); 2504 for (q_index = 0; q_index < q_size; q_index++) { 2505 spin_lock(&queues[q_index].l_lock); 2506 for (i = 0; i < queues[q_index].evt_pool.size; i++) { 2507 evt = &queues[q_index].evt_pool.events[i]; 2508 if (!ibmvfc_event_is_free(evt)) { 2509 if (match(evt, device)) { 2510 evt->eh_comp = ∁ 2511 wait++; 2512 } 2513 } 2514 } 2515 spin_unlock(&queues[q_index].l_lock); 2516 } 2517 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2518 2519 if (wait) { 2520 timeout = wait_for_completion_timeout(&comp, timeout); 2521 2522 if (!timeout) { 2523 wait = 0; 2524 spin_lock_irqsave(vhost->host->host_lock, flags); 2525 for (q_index = 0; q_index < q_size; q_index++) { 2526 spin_lock(&queues[q_index].l_lock); 2527 for (i = 0; i < queues[q_index].evt_pool.size; i++) { 2528 evt = &queues[q_index].evt_pool.events[i]; 2529 if (!ibmvfc_event_is_free(evt)) { 2530 if (match(evt, device)) { 2531 evt->eh_comp = NULL; 2532 wait++; 2533 } 2534 } 2535 } 2536 spin_unlock(&queues[q_index].l_lock); 2537 } 2538 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2539 if (wait) 2540 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 2541 LEAVE; 2542 return wait ? FAILED : SUCCESS; 2543 } 2544 } 2545 } while (wait); 2546 2547 LEAVE; 2548 return SUCCESS; 2549 } 2550 2551 static struct ibmvfc_event *ibmvfc_init_tmf(struct ibmvfc_queue *queue, 2552 struct scsi_device *sdev, 2553 int type) 2554 { 2555 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2556 struct scsi_target *starget = scsi_target(sdev); 2557 struct fc_rport *rport = starget_to_rport(starget); 2558 struct ibmvfc_event *evt; 2559 struct ibmvfc_tmf *tmf; 2560 2561 evt = ibmvfc_get_reserved_event(queue); 2562 if (!evt) 2563 return NULL; 2564 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 2565 2566 tmf = &evt->iu.tmf; 2567 memset(tmf, 0, sizeof(*tmf)); 2568 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 2569 tmf->common.version = cpu_to_be32(2); 2570 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2571 } else { 2572 tmf->common.version = cpu_to_be32(1); 2573 } 2574 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 2575 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 2576 tmf->scsi_id = cpu_to_be64(rport->port_id); 2577 int_to_scsilun(sdev->lun, &tmf->lun); 2578 if (!ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPRESS_ABTS)) 2579 type &= ~IBMVFC_TMF_SUPPRESS_ABTS; 2580 if (vhost->state == IBMVFC_ACTIVE) 2581 tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); 2582 else 2583 tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); 2584 tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); 2585 tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); 2586 2587 init_completion(&evt->comp); 2588 2589 return evt; 2590 } 2591 2592 static int ibmvfc_cancel_all_mq(struct scsi_device *sdev, int type) 2593 { 2594 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2595 struct ibmvfc_event *evt, *found_evt, *temp; 2596 struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; 2597 unsigned long flags; 2598 int num_hwq, i; 2599 int fail = 0; 2600 LIST_HEAD(cancelq); 2601 u16 status; 2602 2603 ENTER; 2604 spin_lock_irqsave(vhost->host->host_lock, flags); 2605 num_hwq = vhost->scsi_scrqs.active_queues; 2606 for (i = 0; i < num_hwq; i++) { 2607 spin_lock(queues[i].q_lock); 2608 spin_lock(&queues[i].l_lock); 2609 found_evt = NULL; 2610 list_for_each_entry(evt, &queues[i].sent, queue_list) { 2611 if (evt->cmnd && evt->cmnd->device == sdev) { 2612 found_evt = evt; 2613 break; 2614 } 2615 } 2616 spin_unlock(&queues[i].l_lock); 2617 2618 if (found_evt && vhost->logged_in) { 2619 evt = ibmvfc_init_tmf(&queues[i], sdev, type); 2620 if (!evt) { 2621 spin_unlock(queues[i].q_lock); 2622 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2623 return -ENOMEM; 2624 } 2625 evt->sync_iu = &queues[i].cancel_rsp; 2626 ibmvfc_send_event(evt, vhost, default_timeout); 2627 list_add_tail(&evt->cancel, &cancelq); 2628 } 2629 2630 spin_unlock(queues[i].q_lock); 2631 } 2632 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2633 2634 if (list_empty(&cancelq)) { 2635 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2636 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2637 return 0; 2638 } 2639 2640 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2641 2642 list_for_each_entry_safe(evt, temp, &cancelq, cancel) { 2643 wait_for_completion(&evt->comp); 2644 status = be16_to_cpu(evt->queue->cancel_rsp.mad_common.status); 2645 list_del(&evt->cancel); 2646 ibmvfc_free_event(evt); 2647 2648 if (status != IBMVFC_MAD_SUCCESS) { 2649 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2650 switch (status) { 2651 case IBMVFC_MAD_DRIVER_FAILED: 2652 case IBMVFC_MAD_CRQ_ERROR: 2653 /* Host adapter most likely going through reset, return success to 2654 * the caller will wait for the command being cancelled to get returned 2655 */ 2656 break; 2657 default: 2658 fail = 1; 2659 break; 2660 } 2661 } 2662 } 2663 2664 if (fail) 2665 return -EIO; 2666 2667 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2668 LEAVE; 2669 return 0; 2670 } 2671 2672 static int ibmvfc_cancel_all_sq(struct scsi_device *sdev, int type) 2673 { 2674 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2675 struct ibmvfc_event *evt, *found_evt; 2676 union ibmvfc_iu rsp; 2677 int rsp_rc = -EBUSY; 2678 unsigned long flags; 2679 u16 status; 2680 2681 ENTER; 2682 found_evt = NULL; 2683 spin_lock_irqsave(vhost->host->host_lock, flags); 2684 spin_lock(&vhost->crq.l_lock); 2685 list_for_each_entry(evt, &vhost->crq.sent, queue_list) { 2686 if (evt->cmnd && evt->cmnd->device == sdev) { 2687 found_evt = evt; 2688 break; 2689 } 2690 } 2691 spin_unlock(&vhost->crq.l_lock); 2692 2693 if (!found_evt) { 2694 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2695 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 2696 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2697 return 0; 2698 } 2699 2700 if (vhost->logged_in) { 2701 evt = ibmvfc_init_tmf(&vhost->crq, sdev, type); 2702 evt->sync_iu = &rsp; 2703 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2704 } 2705 2706 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2707 2708 if (rsp_rc != 0) { 2709 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 2710 /* If failure is received, the host adapter is most likely going 2711 through reset, return success so the caller will wait for the command 2712 being cancelled to get returned */ 2713 return 0; 2714 } 2715 2716 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 2717 2718 wait_for_completion(&evt->comp); 2719 status = be16_to_cpu(rsp.mad_common.status); 2720 spin_lock_irqsave(vhost->host->host_lock, flags); 2721 ibmvfc_free_event(evt); 2722 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2723 2724 if (status != IBMVFC_MAD_SUCCESS) { 2725 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 2726 switch (status) { 2727 case IBMVFC_MAD_DRIVER_FAILED: 2728 case IBMVFC_MAD_CRQ_ERROR: 2729 /* Host adapter most likely going through reset, return success to 2730 the caller will wait for the command being cancelled to get returned */ 2731 return 0; 2732 default: 2733 return -EIO; 2734 }; 2735 } 2736 2737 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 2738 return 0; 2739 } 2740 2741 /** 2742 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 2743 * @sdev: scsi device to cancel commands 2744 * @type: type of error recovery being performed 2745 * 2746 * This sends a cancel to the VIOS for the specified device. This does 2747 * NOT send any abort to the actual device. That must be done separately. 2748 * 2749 * Returns: 2750 * 0 on success / other on failure 2751 **/ 2752 static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 2753 { 2754 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2755 2756 if (vhost->mq_enabled && vhost->using_channels) 2757 return ibmvfc_cancel_all_mq(sdev, type); 2758 else 2759 return ibmvfc_cancel_all_sq(sdev, type); 2760 } 2761 2762 /** 2763 * ibmvfc_match_key - Match function for specified cancel key 2764 * @evt: ibmvfc event struct 2765 * @key: cancel key to match 2766 * 2767 * Returns: 2768 * 1 if event matches key / 0 if event does not match key 2769 **/ 2770 static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) 2771 { 2772 unsigned long cancel_key = (unsigned long)key; 2773 2774 if (evt->crq.format == IBMVFC_CMD_FORMAT && 2775 be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) 2776 return 1; 2777 return 0; 2778 } 2779 2780 /** 2781 * ibmvfc_match_evt - Match function for specified event 2782 * @evt: ibmvfc event struct 2783 * @match: event to match 2784 * 2785 * Returns: 2786 * 1 if event matches key / 0 if event does not match key 2787 **/ 2788 static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) 2789 { 2790 if (evt == match) 2791 return 1; 2792 return 0; 2793 } 2794 2795 /** 2796 * ibmvfc_abort_task_set - Abort outstanding commands to the device 2797 * @sdev: scsi device to abort commands 2798 * 2799 * This sends an Abort Task Set to the VIOS for the specified device. This does 2800 * NOT send any cancel to the VIOS. That must be done separately. 2801 * 2802 * Returns: 2803 * 0 on success / other on failure 2804 **/ 2805 static int ibmvfc_abort_task_set(struct scsi_device *sdev) 2806 { 2807 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2808 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2809 struct ibmvfc_cmd *tmf; 2810 struct ibmvfc_event *evt, *found_evt; 2811 union ibmvfc_iu rsp_iu; 2812 struct ibmvfc_fcp_cmd_iu *iu; 2813 struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); 2814 int rc, rsp_rc = -EBUSY; 2815 unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; 2816 int rsp_code = 0; 2817 2818 found_evt = NULL; 2819 spin_lock_irqsave(vhost->host->host_lock, flags); 2820 spin_lock(&vhost->crq.l_lock); 2821 list_for_each_entry(evt, &vhost->crq.sent, queue_list) { 2822 if (evt->cmnd && evt->cmnd->device == sdev) { 2823 found_evt = evt; 2824 break; 2825 } 2826 } 2827 spin_unlock(&vhost->crq.l_lock); 2828 2829 if (!found_evt) { 2830 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 2831 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 2832 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2833 return 0; 2834 } 2835 2836 if (vhost->state == IBMVFC_ACTIVE) { 2837 evt = ibmvfc_get_event(&vhost->crq); 2838 if (!evt) { 2839 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2840 return -ENOMEM; 2841 } 2842 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 2843 tmf = ibmvfc_init_vfc_cmd(evt, sdev); 2844 iu = ibmvfc_get_fcp_iu(vhost, tmf); 2845 2846 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) 2847 tmf->target_wwpn = cpu_to_be64(rport->port_name); 2848 iu->tmf_flags = IBMVFC_ABORT_TASK_SET; 2849 tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); 2850 evt->sync_iu = &rsp_iu; 2851 2852 tmf->correlation = cpu_to_be64((u64)evt); 2853 2854 init_completion(&evt->comp); 2855 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 2856 } 2857 2858 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2859 2860 if (rsp_rc != 0) { 2861 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 2862 return -EIO; 2863 } 2864 2865 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 2866 timeout = wait_for_completion_timeout(&evt->comp, timeout); 2867 2868 if (!timeout) { 2869 rc = ibmvfc_cancel_all(sdev, 0); 2870 if (!rc) { 2871 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2872 if (rc == SUCCESS) 2873 rc = 0; 2874 } 2875 2876 if (rc) { 2877 sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); 2878 ibmvfc_reset_host(vhost); 2879 rsp_rc = -EIO; 2880 rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); 2881 2882 if (rc == SUCCESS) 2883 rsp_rc = 0; 2884 2885 rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); 2886 if (rc != SUCCESS) { 2887 spin_lock_irqsave(vhost->host->host_lock, flags); 2888 ibmvfc_hard_reset_host(vhost); 2889 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2890 rsp_rc = 0; 2891 } 2892 2893 goto out; 2894 } 2895 } 2896 2897 if (rsp_iu.cmd.status) 2898 rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); 2899 2900 if (rsp_code) { 2901 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 2902 rsp_code = fc_rsp->data.info.rsp_code; 2903 2904 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 2905 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 2906 ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), 2907 be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, 2908 fc_rsp->scsi_status); 2909 rsp_rc = -EIO; 2910 } else 2911 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 2912 2913 out: 2914 spin_lock_irqsave(vhost->host->host_lock, flags); 2915 ibmvfc_free_event(evt); 2916 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2917 return rsp_rc; 2918 } 2919 2920 /** 2921 * ibmvfc_eh_abort_handler - Abort a command 2922 * @cmd: scsi command to abort 2923 * 2924 * Returns: 2925 * SUCCESS / FAST_IO_FAIL / FAILED 2926 **/ 2927 static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 2928 { 2929 struct scsi_device *sdev = cmd->device; 2930 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2931 int cancel_rc, block_rc; 2932 int rc = FAILED; 2933 2934 ENTER; 2935 block_rc = fc_block_scsi_eh(cmd); 2936 ibmvfc_wait_while_resetting(vhost); 2937 if (block_rc != FAST_IO_FAIL) { 2938 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 2939 ibmvfc_abort_task_set(sdev); 2940 } else 2941 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2942 2943 if (!cancel_rc) 2944 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2945 2946 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2947 rc = FAST_IO_FAIL; 2948 2949 LEAVE; 2950 return rc; 2951 } 2952 2953 /** 2954 * ibmvfc_eh_device_reset_handler - Reset a single LUN 2955 * @cmd: scsi command struct 2956 * 2957 * Returns: 2958 * SUCCESS / FAST_IO_FAIL / FAILED 2959 **/ 2960 static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 2961 { 2962 struct scsi_device *sdev = cmd->device; 2963 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2964 int cancel_rc, block_rc, reset_rc = 0; 2965 int rc = FAILED; 2966 2967 ENTER; 2968 block_rc = fc_block_scsi_eh(cmd); 2969 ibmvfc_wait_while_resetting(vhost); 2970 if (block_rc != FAST_IO_FAIL) { 2971 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2972 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2973 } else 2974 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2975 2976 if (!cancel_rc && !reset_rc) 2977 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2978 2979 if (block_rc == FAST_IO_FAIL && rc != FAILED) 2980 rc = FAST_IO_FAIL; 2981 2982 LEAVE; 2983 return rc; 2984 } 2985 2986 /** 2987 * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function 2988 * @sdev: scsi device struct 2989 * @data: return code 2990 * 2991 **/ 2992 static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) 2993 { 2994 unsigned long *rc = data; 2995 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 2996 } 2997 2998 /** 2999 * ibmvfc_eh_target_reset_handler - Reset the target 3000 * @cmd: scsi command struct 3001 * 3002 * Returns: 3003 * SUCCESS / FAST_IO_FAIL / FAILED 3004 **/ 3005 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 3006 { 3007 struct scsi_target *starget = scsi_target(cmd->device); 3008 struct fc_rport *rport = starget_to_rport(starget); 3009 struct Scsi_Host *shost = rport_to_shost(rport); 3010 struct ibmvfc_host *vhost = shost_priv(shost); 3011 int block_rc; 3012 int reset_rc = 0; 3013 int rc = FAILED; 3014 unsigned long cancel_rc = 0; 3015 bool tgt_reset = false; 3016 3017 ENTER; 3018 block_rc = fc_block_rport(rport); 3019 ibmvfc_wait_while_resetting(vhost); 3020 if (block_rc != FAST_IO_FAIL) { 3021 struct scsi_device *sdev; 3022 3023 shost_for_each_device(sdev, shost) { 3024 if ((sdev->channel != starget->channel) || 3025 (sdev->id != starget->id)) 3026 continue; 3027 3028 cancel_rc |= ibmvfc_cancel_all(sdev, 3029 IBMVFC_TMF_TGT_RESET); 3030 if (!tgt_reset) { 3031 reset_rc = ibmvfc_reset_device(sdev, 3032 IBMVFC_TARGET_RESET, "target"); 3033 tgt_reset = true; 3034 } 3035 } 3036 } else 3037 starget_for_each_device(starget, &cancel_rc, 3038 ibmvfc_dev_cancel_all_noreset); 3039 3040 if (!cancel_rc && !reset_rc) 3041 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 3042 3043 if (block_rc == FAST_IO_FAIL && rc != FAILED) 3044 rc = FAST_IO_FAIL; 3045 3046 LEAVE; 3047 return rc; 3048 } 3049 3050 /** 3051 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 3052 * @cmd: struct scsi_cmnd having problems 3053 * 3054 **/ 3055 static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 3056 { 3057 int rc; 3058 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 3059 3060 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 3061 rc = ibmvfc_issue_fc_host_lip(vhost->host); 3062 3063 return rc ? FAILED : SUCCESS; 3064 } 3065 3066 /** 3067 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 3068 * @rport: rport struct 3069 * 3070 * Return value: 3071 * none 3072 **/ 3073 static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 3074 { 3075 struct Scsi_Host *shost = rport_to_shost(rport); 3076 struct ibmvfc_host *vhost = shost_priv(shost); 3077 struct fc_rport *dev_rport; 3078 struct scsi_device *sdev; 3079 struct ibmvfc_target *tgt; 3080 unsigned long rc, flags; 3081 unsigned int found; 3082 3083 ENTER; 3084 shost_for_each_device(sdev, shost) { 3085 dev_rport = starget_to_rport(scsi_target(sdev)); 3086 if (dev_rport != rport) 3087 continue; 3088 ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); 3089 } 3090 3091 rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); 3092 3093 if (rc == FAILED) 3094 ibmvfc_issue_fc_host_lip(shost); 3095 3096 spin_lock_irqsave(shost->host_lock, flags); 3097 found = 0; 3098 list_for_each_entry(tgt, &vhost->targets, queue) { 3099 if (tgt->scsi_id == rport->port_id) { 3100 found++; 3101 break; 3102 } 3103 } 3104 3105 if (found && tgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 3106 /* 3107 * If we get here, that means we previously attempted to send 3108 * an implicit logout to the target but it failed, most likely 3109 * due to I/O being pending, so we need to send it again 3110 */ 3111 ibmvfc_del_tgt(tgt); 3112 ibmvfc_reinit_host(vhost); 3113 } 3114 3115 spin_unlock_irqrestore(shost->host_lock, flags); 3116 LEAVE; 3117 } 3118 3119 static const struct ibmvfc_async_desc ae_desc [] = { 3120 { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3121 { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3122 { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3123 { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3124 { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, 3125 { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, 3126 { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, 3127 { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, 3128 { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, 3129 { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, 3130 { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, 3131 { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, 3132 { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, 3133 }; 3134 3135 static const struct ibmvfc_async_desc unknown_ae = { 3136 "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL 3137 }; 3138 3139 /** 3140 * ibmvfc_get_ae_desc - Get text description for async event 3141 * @ae: async event 3142 * 3143 **/ 3144 static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) 3145 { 3146 int i; 3147 3148 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 3149 if (ae_desc[i].ae == ae) 3150 return &ae_desc[i]; 3151 3152 return &unknown_ae; 3153 } 3154 3155 static const struct { 3156 enum ibmvfc_ae_link_state state; 3157 const char *desc; 3158 } link_desc [] = { 3159 { IBMVFC_AE_LS_LINK_UP, " link up" }, 3160 { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, 3161 { IBMVFC_AE_LS_LINK_DOWN, " link down" }, 3162 { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, 3163 }; 3164 3165 /** 3166 * ibmvfc_get_link_state - Get text description for link state 3167 * @state: link state 3168 * 3169 **/ 3170 static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) 3171 { 3172 int i; 3173 3174 for (i = 0; i < ARRAY_SIZE(link_desc); i++) 3175 if (link_desc[i].state == state) 3176 return link_desc[i].desc; 3177 3178 return ""; 3179 } 3180 3181 /** 3182 * ibmvfc_handle_async - Handle an async event from the adapter 3183 * @crq: crq to process 3184 * @vhost: ibmvfc host struct 3185 * 3186 **/ 3187 static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 3188 struct ibmvfc_host *vhost) 3189 { 3190 const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); 3191 struct ibmvfc_target *tgt; 3192 3193 ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," 3194 " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id), 3195 be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name), 3196 ibmvfc_get_link_state(crq->link_state)); 3197 3198 switch (be64_to_cpu(crq->event)) { 3199 case IBMVFC_AE_RESUME: 3200 switch (crq->link_state) { 3201 case IBMVFC_AE_LS_LINK_DOWN: 3202 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3203 break; 3204 case IBMVFC_AE_LS_LINK_DEAD: 3205 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3206 break; 3207 case IBMVFC_AE_LS_LINK_UP: 3208 case IBMVFC_AE_LS_LINK_BOUNCED: 3209 default: 3210 vhost->events_to_log |= IBMVFC_AE_LINKUP; 3211 vhost->delay_init = 1; 3212 __ibmvfc_reset_host(vhost); 3213 break; 3214 } 3215 3216 break; 3217 case IBMVFC_AE_LINK_UP: 3218 vhost->events_to_log |= IBMVFC_AE_LINKUP; 3219 vhost->delay_init = 1; 3220 __ibmvfc_reset_host(vhost); 3221 break; 3222 case IBMVFC_AE_SCN_FABRIC: 3223 case IBMVFC_AE_SCN_DOMAIN: 3224 vhost->events_to_log |= IBMVFC_AE_RSCN; 3225 if (vhost->state < IBMVFC_HALTED) { 3226 vhost->delay_init = 1; 3227 __ibmvfc_reset_host(vhost); 3228 } 3229 break; 3230 case IBMVFC_AE_SCN_NPORT: 3231 case IBMVFC_AE_SCN_GROUP: 3232 vhost->events_to_log |= IBMVFC_AE_RSCN; 3233 ibmvfc_reinit_host(vhost); 3234 break; 3235 case IBMVFC_AE_ELS_LOGO: 3236 case IBMVFC_AE_ELS_PRLO: 3237 case IBMVFC_AE_ELS_PLOGI: 3238 list_for_each_entry(tgt, &vhost->targets, queue) { 3239 if (!crq->scsi_id && !crq->wwpn && !crq->node_name) 3240 break; 3241 if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) 3242 continue; 3243 if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) 3244 continue; 3245 if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) 3246 continue; 3247 if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) 3248 tgt->logo_rcvd = 1; 3249 if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { 3250 ibmvfc_del_tgt(tgt); 3251 ibmvfc_reinit_host(vhost); 3252 } 3253 } 3254 break; 3255 case IBMVFC_AE_LINK_DOWN: 3256 case IBMVFC_AE_ADAPTER_FAILED: 3257 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3258 break; 3259 case IBMVFC_AE_LINK_DEAD: 3260 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3261 break; 3262 case IBMVFC_AE_HALT: 3263 ibmvfc_link_down(vhost, IBMVFC_HALTED); 3264 break; 3265 default: 3266 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 3267 break; 3268 } 3269 } 3270 3271 /** 3272 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 3273 * @crq: Command/Response queue 3274 * @vhost: ibmvfc host struct 3275 * @evt_doneq: Event done queue 3276 * 3277 **/ 3278 static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost, 3279 struct list_head *evt_doneq) 3280 { 3281 long rc; 3282 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 3283 3284 switch (crq->valid) { 3285 case IBMVFC_CRQ_INIT_RSP: 3286 switch (crq->format) { 3287 case IBMVFC_CRQ_INIT: 3288 dev_info(vhost->dev, "Partner initialized\n"); 3289 /* Send back a response */ 3290 rc = ibmvfc_send_crq_init_complete(vhost); 3291 if (rc == 0) 3292 ibmvfc_init_host(vhost); 3293 else 3294 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 3295 break; 3296 case IBMVFC_CRQ_INIT_COMPLETE: 3297 dev_info(vhost->dev, "Partner initialization complete\n"); 3298 ibmvfc_init_host(vhost); 3299 break; 3300 default: 3301 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 3302 } 3303 return; 3304 case IBMVFC_CRQ_XPORT_EVENT: 3305 vhost->state = IBMVFC_NO_CRQ; 3306 vhost->logged_in = 0; 3307 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3308 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 3309 /* We need to re-setup the interpartition connection */ 3310 dev_info(vhost->dev, "Partition migrated, Re-enabling adapter\n"); 3311 vhost->client_migrated = 1; 3312 3313 scsi_block_requests(vhost->host); 3314 ibmvfc_purge_requests(vhost, DID_REQUEUE); 3315 ibmvfc_set_host_state(vhost, IBMVFC_LINK_DOWN); 3316 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); 3317 wake_up(&vhost->work_wait_q); 3318 } else if (crq->format == IBMVFC_PARTNER_FAILED || crq->format == IBMVFC_PARTNER_DEREGISTER) { 3319 dev_err(vhost->dev, "Host partner adapter deregistered or failed (rc=%d)\n", crq->format); 3320 ibmvfc_purge_requests(vhost, DID_ERROR); 3321 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 3322 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); 3323 } else { 3324 dev_err(vhost->dev, "Received unknown transport event from partner (rc=%d)\n", crq->format); 3325 } 3326 return; 3327 case IBMVFC_CRQ_CMD_RSP: 3328 break; 3329 default: 3330 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 3331 return; 3332 } 3333 3334 if (crq->format == IBMVFC_ASYNC_EVENT) 3335 return; 3336 3337 /* The only kind of payload CRQs we should get are responses to 3338 * things we send. Make sure this response is to something we 3339 * actually sent 3340 */ 3341 if (unlikely(!ibmvfc_valid_event(&vhost->crq.evt_pool, evt))) { 3342 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 3343 crq->ioba); 3344 return; 3345 } 3346 3347 if (unlikely(atomic_dec_if_positive(&evt->active))) { 3348 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 3349 crq->ioba); 3350 return; 3351 } 3352 3353 spin_lock(&evt->queue->l_lock); 3354 list_move_tail(&evt->queue_list, evt_doneq); 3355 spin_unlock(&evt->queue->l_lock); 3356 } 3357 3358 /** 3359 * ibmvfc_scan_finished - Check if the device scan is done. 3360 * @shost: scsi host struct 3361 * @time: current elapsed time 3362 * 3363 * Returns: 3364 * 0 if scan is not done / 1 if scan is done 3365 **/ 3366 static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 3367 { 3368 unsigned long flags; 3369 struct ibmvfc_host *vhost = shost_priv(shost); 3370 int done = 0; 3371 3372 spin_lock_irqsave(shost->host_lock, flags); 3373 if (!vhost->scan_timeout) 3374 done = 1; 3375 else if (time >= (vhost->scan_timeout * HZ)) { 3376 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 3377 "continuing initialization\n", vhost->scan_timeout); 3378 done = 1; 3379 } 3380 3381 if (vhost->scan_complete) { 3382 vhost->scan_timeout = init_timeout; 3383 done = 1; 3384 } 3385 spin_unlock_irqrestore(shost->host_lock, flags); 3386 return done; 3387 } 3388 3389 /** 3390 * ibmvfc_slave_alloc - Setup the device's task set value 3391 * @sdev: struct scsi_device device to configure 3392 * 3393 * Set the device's task set value so that error handling works as 3394 * expected. 3395 * 3396 * Returns: 3397 * 0 on success / -ENXIO if device does not exist 3398 **/ 3399 static int ibmvfc_slave_alloc(struct scsi_device *sdev) 3400 { 3401 struct Scsi_Host *shost = sdev->host; 3402 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 3403 struct ibmvfc_host *vhost = shost_priv(shost); 3404 unsigned long flags = 0; 3405 3406 if (!rport || fc_remote_port_chkready(rport)) 3407 return -ENXIO; 3408 3409 spin_lock_irqsave(shost->host_lock, flags); 3410 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 3411 spin_unlock_irqrestore(shost->host_lock, flags); 3412 return 0; 3413 } 3414 3415 /** 3416 * ibmvfc_target_alloc - Setup the target's task set value 3417 * @starget: struct scsi_target 3418 * 3419 * Set the target's task set value so that error handling works as 3420 * expected. 3421 * 3422 * Returns: 3423 * 0 on success / -ENXIO if device does not exist 3424 **/ 3425 static int ibmvfc_target_alloc(struct scsi_target *starget) 3426 { 3427 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 3428 struct ibmvfc_host *vhost = shost_priv(shost); 3429 unsigned long flags = 0; 3430 3431 spin_lock_irqsave(shost->host_lock, flags); 3432 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 3433 spin_unlock_irqrestore(shost->host_lock, flags); 3434 return 0; 3435 } 3436 3437 /** 3438 * ibmvfc_slave_configure - Configure the device 3439 * @sdev: struct scsi_device device to configure 3440 * 3441 * Enable allow_restart for a device if it is a disk. Adjust the 3442 * queue_depth here also. 3443 * 3444 * Returns: 3445 * 0 3446 **/ 3447 static int ibmvfc_slave_configure(struct scsi_device *sdev) 3448 { 3449 struct Scsi_Host *shost = sdev->host; 3450 unsigned long flags = 0; 3451 3452 spin_lock_irqsave(shost->host_lock, flags); 3453 if (sdev->type == TYPE_DISK) { 3454 sdev->allow_restart = 1; 3455 blk_queue_rq_timeout(sdev->request_queue, 120 * HZ); 3456 } 3457 spin_unlock_irqrestore(shost->host_lock, flags); 3458 return 0; 3459 } 3460 3461 /** 3462 * ibmvfc_change_queue_depth - Change the device's queue depth 3463 * @sdev: scsi device struct 3464 * @qdepth: depth to set 3465 * 3466 * Return value: 3467 * actual depth set 3468 **/ 3469 static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 3470 { 3471 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 3472 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 3473 3474 return scsi_change_queue_depth(sdev, qdepth); 3475 } 3476 3477 static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 3478 struct device_attribute *attr, char *buf) 3479 { 3480 struct Scsi_Host *shost = class_to_shost(dev); 3481 struct ibmvfc_host *vhost = shost_priv(shost); 3482 3483 return snprintf(buf, PAGE_SIZE, "%s\n", 3484 vhost->login_buf->resp.partition_name); 3485 } 3486 3487 static ssize_t ibmvfc_show_host_device_name(struct device *dev, 3488 struct device_attribute *attr, char *buf) 3489 { 3490 struct Scsi_Host *shost = class_to_shost(dev); 3491 struct ibmvfc_host *vhost = shost_priv(shost); 3492 3493 return snprintf(buf, PAGE_SIZE, "%s\n", 3494 vhost->login_buf->resp.device_name); 3495 } 3496 3497 static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 3498 struct device_attribute *attr, char *buf) 3499 { 3500 struct Scsi_Host *shost = class_to_shost(dev); 3501 struct ibmvfc_host *vhost = shost_priv(shost); 3502 3503 return snprintf(buf, PAGE_SIZE, "%s\n", 3504 vhost->login_buf->resp.port_loc_code); 3505 } 3506 3507 static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 3508 struct device_attribute *attr, char *buf) 3509 { 3510 struct Scsi_Host *shost = class_to_shost(dev); 3511 struct ibmvfc_host *vhost = shost_priv(shost); 3512 3513 return snprintf(buf, PAGE_SIZE, "%s\n", 3514 vhost->login_buf->resp.drc_name); 3515 } 3516 3517 static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 3518 struct device_attribute *attr, char *buf) 3519 { 3520 struct Scsi_Host *shost = class_to_shost(dev); 3521 struct ibmvfc_host *vhost = shost_priv(shost); 3522 return snprintf(buf, PAGE_SIZE, "%d\n", be32_to_cpu(vhost->login_buf->resp.version)); 3523 } 3524 3525 static ssize_t ibmvfc_show_host_capabilities(struct device *dev, 3526 struct device_attribute *attr, char *buf) 3527 { 3528 struct Scsi_Host *shost = class_to_shost(dev); 3529 struct ibmvfc_host *vhost = shost_priv(shost); 3530 return snprintf(buf, PAGE_SIZE, "%llx\n", be64_to_cpu(vhost->login_buf->resp.capabilities)); 3531 } 3532 3533 /** 3534 * ibmvfc_show_log_level - Show the adapter's error logging level 3535 * @dev: class device struct 3536 * @attr: unused 3537 * @buf: buffer 3538 * 3539 * Return value: 3540 * number of bytes printed to buffer 3541 **/ 3542 static ssize_t ibmvfc_show_log_level(struct device *dev, 3543 struct device_attribute *attr, char *buf) 3544 { 3545 struct Scsi_Host *shost = class_to_shost(dev); 3546 struct ibmvfc_host *vhost = shost_priv(shost); 3547 unsigned long flags = 0; 3548 int len; 3549 3550 spin_lock_irqsave(shost->host_lock, flags); 3551 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 3552 spin_unlock_irqrestore(shost->host_lock, flags); 3553 return len; 3554 } 3555 3556 /** 3557 * ibmvfc_store_log_level - Change the adapter's error logging level 3558 * @dev: class device struct 3559 * @attr: unused 3560 * @buf: buffer 3561 * @count: buffer size 3562 * 3563 * Return value: 3564 * number of bytes printed to buffer 3565 **/ 3566 static ssize_t ibmvfc_store_log_level(struct device *dev, 3567 struct device_attribute *attr, 3568 const char *buf, size_t count) 3569 { 3570 struct Scsi_Host *shost = class_to_shost(dev); 3571 struct ibmvfc_host *vhost = shost_priv(shost); 3572 unsigned long flags = 0; 3573 3574 spin_lock_irqsave(shost->host_lock, flags); 3575 vhost->log_level = simple_strtoul(buf, NULL, 10); 3576 spin_unlock_irqrestore(shost->host_lock, flags); 3577 return strlen(buf); 3578 } 3579 3580 static ssize_t ibmvfc_show_scsi_channels(struct device *dev, 3581 struct device_attribute *attr, char *buf) 3582 { 3583 struct Scsi_Host *shost = class_to_shost(dev); 3584 struct ibmvfc_host *vhost = shost_priv(shost); 3585 struct ibmvfc_channels *scsi = &vhost->scsi_scrqs; 3586 unsigned long flags = 0; 3587 int len; 3588 3589 spin_lock_irqsave(shost->host_lock, flags); 3590 len = snprintf(buf, PAGE_SIZE, "%d\n", scsi->desired_queues); 3591 spin_unlock_irqrestore(shost->host_lock, flags); 3592 return len; 3593 } 3594 3595 static ssize_t ibmvfc_store_scsi_channels(struct device *dev, 3596 struct device_attribute *attr, 3597 const char *buf, size_t count) 3598 { 3599 struct Scsi_Host *shost = class_to_shost(dev); 3600 struct ibmvfc_host *vhost = shost_priv(shost); 3601 struct ibmvfc_channels *scsi = &vhost->scsi_scrqs; 3602 unsigned long flags = 0; 3603 unsigned int channels; 3604 3605 spin_lock_irqsave(shost->host_lock, flags); 3606 channels = simple_strtoul(buf, NULL, 10); 3607 scsi->desired_queues = min(channels, shost->nr_hw_queues); 3608 ibmvfc_hard_reset_host(vhost); 3609 spin_unlock_irqrestore(shost->host_lock, flags); 3610 return strlen(buf); 3611 } 3612 3613 static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); 3614 static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); 3615 static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); 3616 static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); 3617 static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); 3618 static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); 3619 static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, 3620 ibmvfc_show_log_level, ibmvfc_store_log_level); 3621 static DEVICE_ATTR(nr_scsi_channels, S_IRUGO | S_IWUSR, 3622 ibmvfc_show_scsi_channels, ibmvfc_store_scsi_channels); 3623 3624 #ifdef CONFIG_SCSI_IBMVFC_TRACE 3625 /** 3626 * ibmvfc_read_trace - Dump the adapter trace 3627 * @filp: open sysfs file 3628 * @kobj: kobject struct 3629 * @bin_attr: bin_attribute struct 3630 * @buf: buffer 3631 * @off: offset 3632 * @count: buffer size 3633 * 3634 * Return value: 3635 * number of bytes printed to buffer 3636 **/ 3637 static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, 3638 struct bin_attribute *bin_attr, 3639 char *buf, loff_t off, size_t count) 3640 { 3641 struct device *dev = kobj_to_dev(kobj); 3642 struct Scsi_Host *shost = class_to_shost(dev); 3643 struct ibmvfc_host *vhost = shost_priv(shost); 3644 unsigned long flags = 0; 3645 int size = IBMVFC_TRACE_SIZE; 3646 char *src = (char *)vhost->trace; 3647 3648 if (off > size) 3649 return 0; 3650 if (off + count > size) { 3651 size -= off; 3652 count = size; 3653 } 3654 3655 spin_lock_irqsave(shost->host_lock, flags); 3656 memcpy(buf, &src[off], count); 3657 spin_unlock_irqrestore(shost->host_lock, flags); 3658 return count; 3659 } 3660 3661 static struct bin_attribute ibmvfc_trace_attr = { 3662 .attr = { 3663 .name = "trace", 3664 .mode = S_IRUGO, 3665 }, 3666 .size = 0, 3667 .read = ibmvfc_read_trace, 3668 }; 3669 #endif 3670 3671 static struct attribute *ibmvfc_host_attrs[] = { 3672 &dev_attr_partition_name.attr, 3673 &dev_attr_device_name.attr, 3674 &dev_attr_port_loc_code.attr, 3675 &dev_attr_drc_name.attr, 3676 &dev_attr_npiv_version.attr, 3677 &dev_attr_capabilities.attr, 3678 &dev_attr_log_level.attr, 3679 &dev_attr_nr_scsi_channels.attr, 3680 NULL 3681 }; 3682 3683 ATTRIBUTE_GROUPS(ibmvfc_host); 3684 3685 static const struct scsi_host_template driver_template = { 3686 .module = THIS_MODULE, 3687 .name = "IBM POWER Virtual FC Adapter", 3688 .proc_name = IBMVFC_NAME, 3689 .queuecommand = ibmvfc_queuecommand, 3690 .eh_timed_out = fc_eh_timed_out, 3691 .eh_abort_handler = ibmvfc_eh_abort_handler, 3692 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 3693 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 3694 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 3695 .slave_alloc = ibmvfc_slave_alloc, 3696 .slave_configure = ibmvfc_slave_configure, 3697 .target_alloc = ibmvfc_target_alloc, 3698 .scan_finished = ibmvfc_scan_finished, 3699 .change_queue_depth = ibmvfc_change_queue_depth, 3700 .cmd_per_lun = 16, 3701 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 3702 .this_id = -1, 3703 .sg_tablesize = SG_ALL, 3704 .max_sectors = IBMVFC_MAX_SECTORS, 3705 .shost_groups = ibmvfc_host_groups, 3706 .track_queue_depth = 1, 3707 }; 3708 3709 /** 3710 * ibmvfc_next_async_crq - Returns the next entry in async queue 3711 * @vhost: ibmvfc host struct 3712 * 3713 * Returns: 3714 * Pointer to next entry in queue / NULL if empty 3715 **/ 3716 static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 3717 { 3718 struct ibmvfc_queue *async_crq = &vhost->async_crq; 3719 struct ibmvfc_async_crq *crq; 3720 3721 crq = &async_crq->msgs.async[async_crq->cur]; 3722 if (crq->valid & 0x80) { 3723 if (++async_crq->cur == async_crq->size) 3724 async_crq->cur = 0; 3725 rmb(); 3726 } else 3727 crq = NULL; 3728 3729 return crq; 3730 } 3731 3732 /** 3733 * ibmvfc_next_crq - Returns the next entry in message queue 3734 * @vhost: ibmvfc host struct 3735 * 3736 * Returns: 3737 * Pointer to next entry in queue / NULL if empty 3738 **/ 3739 static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 3740 { 3741 struct ibmvfc_queue *queue = &vhost->crq; 3742 struct ibmvfc_crq *crq; 3743 3744 crq = &queue->msgs.crq[queue->cur]; 3745 if (crq->valid & 0x80) { 3746 if (++queue->cur == queue->size) 3747 queue->cur = 0; 3748 rmb(); 3749 } else 3750 crq = NULL; 3751 3752 return crq; 3753 } 3754 3755 /** 3756 * ibmvfc_interrupt - Interrupt handler 3757 * @irq: number of irq to handle, not used 3758 * @dev_instance: ibmvfc_host that received interrupt 3759 * 3760 * Returns: 3761 * IRQ_HANDLED 3762 **/ 3763 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 3764 { 3765 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 3766 unsigned long flags; 3767 3768 spin_lock_irqsave(vhost->host->host_lock, flags); 3769 vio_disable_interrupts(to_vio_dev(vhost->dev)); 3770 tasklet_schedule(&vhost->tasklet); 3771 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3772 return IRQ_HANDLED; 3773 } 3774 3775 /** 3776 * ibmvfc_tasklet - Interrupt handler tasklet 3777 * @data: ibmvfc host struct 3778 * 3779 * Returns: 3780 * Nothing 3781 **/ 3782 static void ibmvfc_tasklet(void *data) 3783 { 3784 struct ibmvfc_host *vhost = data; 3785 struct vio_dev *vdev = to_vio_dev(vhost->dev); 3786 struct ibmvfc_crq *crq; 3787 struct ibmvfc_async_crq *async; 3788 struct ibmvfc_event *evt, *temp; 3789 unsigned long flags; 3790 int done = 0; 3791 LIST_HEAD(evt_doneq); 3792 3793 spin_lock_irqsave(vhost->host->host_lock, flags); 3794 spin_lock(vhost->crq.q_lock); 3795 while (!done) { 3796 /* Pull all the valid messages off the async CRQ */ 3797 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3798 ibmvfc_handle_async(async, vhost); 3799 async->valid = 0; 3800 wmb(); 3801 } 3802 3803 /* Pull all the valid messages off the CRQ */ 3804 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3805 ibmvfc_handle_crq(crq, vhost, &evt_doneq); 3806 crq->valid = 0; 3807 wmb(); 3808 } 3809 3810 vio_enable_interrupts(vdev); 3811 if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 3812 vio_disable_interrupts(vdev); 3813 ibmvfc_handle_async(async, vhost); 3814 async->valid = 0; 3815 wmb(); 3816 } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 3817 vio_disable_interrupts(vdev); 3818 ibmvfc_handle_crq(crq, vhost, &evt_doneq); 3819 crq->valid = 0; 3820 wmb(); 3821 } else 3822 done = 1; 3823 } 3824 3825 spin_unlock(vhost->crq.q_lock); 3826 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3827 3828 list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) { 3829 del_timer(&evt->timer); 3830 list_del(&evt->queue_list); 3831 ibmvfc_trc_end(evt); 3832 evt->done(evt); 3833 } 3834 } 3835 3836 static int ibmvfc_toggle_scrq_irq(struct ibmvfc_queue *scrq, int enable) 3837 { 3838 struct device *dev = scrq->vhost->dev; 3839 struct vio_dev *vdev = to_vio_dev(dev); 3840 unsigned long rc; 3841 int irq_action = H_ENABLE_VIO_INTERRUPT; 3842 3843 if (!enable) 3844 irq_action = H_DISABLE_VIO_INTERRUPT; 3845 3846 rc = plpar_hcall_norets(H_VIOCTL, vdev->unit_address, irq_action, 3847 scrq->hw_irq, 0, 0); 3848 3849 if (rc) 3850 dev_err(dev, "Couldn't %s sub-crq[%lu] irq. rc=%ld\n", 3851 enable ? "enable" : "disable", scrq->hwq_id, rc); 3852 3853 return rc; 3854 } 3855 3856 static void ibmvfc_handle_scrq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost, 3857 struct list_head *evt_doneq) 3858 { 3859 struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); 3860 3861 switch (crq->valid) { 3862 case IBMVFC_CRQ_CMD_RSP: 3863 break; 3864 case IBMVFC_CRQ_XPORT_EVENT: 3865 return; 3866 default: 3867 dev_err(vhost->dev, "Got and invalid message type 0x%02x\n", crq->valid); 3868 return; 3869 } 3870 3871 /* The only kind of payload CRQs we should get are responses to 3872 * things we send. Make sure this response is to something we 3873 * actually sent 3874 */ 3875 if (unlikely(!ibmvfc_valid_event(&evt->queue->evt_pool, evt))) { 3876 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 3877 crq->ioba); 3878 return; 3879 } 3880 3881 if (unlikely(atomic_dec_if_positive(&evt->active))) { 3882 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 3883 crq->ioba); 3884 return; 3885 } 3886 3887 spin_lock(&evt->queue->l_lock); 3888 list_move_tail(&evt->queue_list, evt_doneq); 3889 spin_unlock(&evt->queue->l_lock); 3890 } 3891 3892 static struct ibmvfc_crq *ibmvfc_next_scrq(struct ibmvfc_queue *scrq) 3893 { 3894 struct ibmvfc_crq *crq; 3895 3896 crq = &scrq->msgs.scrq[scrq->cur].crq; 3897 if (crq->valid & 0x80) { 3898 if (++scrq->cur == scrq->size) 3899 scrq->cur = 0; 3900 rmb(); 3901 } else 3902 crq = NULL; 3903 3904 return crq; 3905 } 3906 3907 static void ibmvfc_drain_sub_crq(struct ibmvfc_queue *scrq) 3908 { 3909 struct ibmvfc_crq *crq; 3910 struct ibmvfc_event *evt, *temp; 3911 unsigned long flags; 3912 int done = 0; 3913 LIST_HEAD(evt_doneq); 3914 3915 spin_lock_irqsave(scrq->q_lock, flags); 3916 while (!done) { 3917 while ((crq = ibmvfc_next_scrq(scrq)) != NULL) { 3918 ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq); 3919 crq->valid = 0; 3920 wmb(); 3921 } 3922 3923 ibmvfc_toggle_scrq_irq(scrq, 1); 3924 if ((crq = ibmvfc_next_scrq(scrq)) != NULL) { 3925 ibmvfc_toggle_scrq_irq(scrq, 0); 3926 ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq); 3927 crq->valid = 0; 3928 wmb(); 3929 } else 3930 done = 1; 3931 } 3932 spin_unlock_irqrestore(scrq->q_lock, flags); 3933 3934 list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) { 3935 del_timer(&evt->timer); 3936 list_del(&evt->queue_list); 3937 ibmvfc_trc_end(evt); 3938 evt->done(evt); 3939 } 3940 } 3941 3942 static irqreturn_t ibmvfc_interrupt_mq(int irq, void *scrq_instance) 3943 { 3944 struct ibmvfc_queue *scrq = (struct ibmvfc_queue *)scrq_instance; 3945 3946 ibmvfc_toggle_scrq_irq(scrq, 0); 3947 ibmvfc_drain_sub_crq(scrq); 3948 3949 return IRQ_HANDLED; 3950 } 3951 3952 /** 3953 * ibmvfc_init_tgt - Set the next init job step for the target 3954 * @tgt: ibmvfc target struct 3955 * @job_step: job step to perform 3956 * 3957 **/ 3958 static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 3959 void (*job_step) (struct ibmvfc_target *)) 3960 { 3961 if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT)) 3962 tgt->job_step = job_step; 3963 wake_up(&tgt->vhost->work_wait_q); 3964 } 3965 3966 /** 3967 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 3968 * @tgt: ibmvfc target struct 3969 * @job_step: initialization job step 3970 * 3971 * Returns: 1 if step will be retried / 0 if not 3972 * 3973 **/ 3974 static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 3975 void (*job_step) (struct ibmvfc_target *)) 3976 { 3977 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 3978 ibmvfc_del_tgt(tgt); 3979 wake_up(&tgt->vhost->work_wait_q); 3980 return 0; 3981 } else 3982 ibmvfc_init_tgt(tgt, job_step); 3983 return 1; 3984 } 3985 3986 /* Defined in FC-LS */ 3987 static const struct { 3988 int code; 3989 int retry; 3990 int logged_in; 3991 } prli_rsp [] = { 3992 { 0, 1, 0 }, 3993 { 1, 0, 1 }, 3994 { 2, 1, 0 }, 3995 { 3, 1, 0 }, 3996 { 4, 0, 0 }, 3997 { 5, 0, 0 }, 3998 { 6, 0, 1 }, 3999 { 7, 0, 0 }, 4000 { 8, 1, 0 }, 4001 }; 4002 4003 /** 4004 * ibmvfc_get_prli_rsp - Find PRLI response index 4005 * @flags: PRLI response flags 4006 * 4007 **/ 4008 static int ibmvfc_get_prli_rsp(u16 flags) 4009 { 4010 int i; 4011 int code = (flags & 0x0f00) >> 8; 4012 4013 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 4014 if (prli_rsp[i].code == code) 4015 return i; 4016 4017 return 0; 4018 } 4019 4020 /** 4021 * ibmvfc_tgt_prli_done - Completion handler for Process Login 4022 * @evt: ibmvfc event struct 4023 * 4024 **/ 4025 static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 4026 { 4027 struct ibmvfc_target *tgt = evt->tgt; 4028 struct ibmvfc_host *vhost = evt->vhost; 4029 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 4030 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 4031 u32 status = be16_to_cpu(rsp->common.status); 4032 int index, level = IBMVFC_DEFAULT_LOG_LEVEL; 4033 4034 vhost->discovery_threads--; 4035 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4036 switch (status) { 4037 case IBMVFC_MAD_SUCCESS: 4038 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 4039 parms->type, parms->flags, parms->service_parms); 4040 4041 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 4042 index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); 4043 if (prli_rsp[index].logged_in) { 4044 if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { 4045 tgt->need_login = 0; 4046 tgt->ids.roles = 0; 4047 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) 4048 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 4049 if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) 4050 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 4051 tgt->add_rport = 1; 4052 } else 4053 ibmvfc_del_tgt(tgt); 4054 } else if (prli_rsp[index].retry) 4055 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 4056 else 4057 ibmvfc_del_tgt(tgt); 4058 } else 4059 ibmvfc_del_tgt(tgt); 4060 break; 4061 case IBMVFC_MAD_DRIVER_FAILED: 4062 break; 4063 case IBMVFC_MAD_CRQ_ERROR: 4064 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 4065 break; 4066 case IBMVFC_MAD_FAILED: 4067 default: 4068 if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && 4069 be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) 4070 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 4071 else if (tgt->logo_rcvd) 4072 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 4073 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4074 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 4075 else 4076 ibmvfc_del_tgt(tgt); 4077 4078 tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 4079 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4080 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), status); 4081 break; 4082 } 4083 4084 kref_put(&tgt->kref, ibmvfc_release_tgt); 4085 ibmvfc_free_event(evt); 4086 wake_up(&vhost->work_wait_q); 4087 } 4088 4089 /** 4090 * ibmvfc_tgt_send_prli - Send a process login 4091 * @tgt: ibmvfc target struct 4092 * 4093 **/ 4094 static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 4095 { 4096 struct ibmvfc_process_login *prli; 4097 struct ibmvfc_host *vhost = tgt->vhost; 4098 struct ibmvfc_event *evt; 4099 4100 if (vhost->discovery_threads >= disc_threads) 4101 return; 4102 4103 kref_get(&tgt->kref); 4104 evt = ibmvfc_get_reserved_event(&vhost->crq); 4105 if (!evt) { 4106 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4107 kref_put(&tgt->kref, ibmvfc_release_tgt); 4108 __ibmvfc_reset_host(vhost); 4109 return; 4110 } 4111 vhost->discovery_threads++; 4112 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 4113 evt->tgt = tgt; 4114 prli = &evt->iu.prli; 4115 memset(prli, 0, sizeof(*prli)); 4116 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 4117 prli->common.version = cpu_to_be32(2); 4118 prli->target_wwpn = cpu_to_be64(tgt->wwpn); 4119 } else { 4120 prli->common.version = cpu_to_be32(1); 4121 } 4122 prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); 4123 prli->common.length = cpu_to_be16(sizeof(*prli)); 4124 prli->scsi_id = cpu_to_be64(tgt->scsi_id); 4125 4126 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 4127 prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); 4128 prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); 4129 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED); 4130 4131 if (cls3_error) 4132 prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY); 4133 4134 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4135 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4136 vhost->discovery_threads--; 4137 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4138 kref_put(&tgt->kref, ibmvfc_release_tgt); 4139 } else 4140 tgt_dbg(tgt, "Sent process login\n"); 4141 } 4142 4143 /** 4144 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 4145 * @evt: ibmvfc event struct 4146 * 4147 **/ 4148 static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 4149 { 4150 struct ibmvfc_target *tgt = evt->tgt; 4151 struct ibmvfc_host *vhost = evt->vhost; 4152 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 4153 u32 status = be16_to_cpu(rsp->common.status); 4154 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4155 4156 vhost->discovery_threads--; 4157 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4158 switch (status) { 4159 case IBMVFC_MAD_SUCCESS: 4160 tgt_dbg(tgt, "Port Login succeeded\n"); 4161 if (tgt->ids.port_name && 4162 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 4163 vhost->reinit = 1; 4164 tgt_dbg(tgt, "Port re-init required\n"); 4165 break; 4166 } 4167 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 4168 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 4169 tgt->ids.port_id = tgt->scsi_id; 4170 memcpy(&tgt->service_parms, &rsp->service_parms, 4171 sizeof(tgt->service_parms)); 4172 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 4173 sizeof(tgt->service_parms_change)); 4174 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 4175 break; 4176 case IBMVFC_MAD_DRIVER_FAILED: 4177 break; 4178 case IBMVFC_MAD_CRQ_ERROR: 4179 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 4180 break; 4181 case IBMVFC_MAD_FAILED: 4182 default: 4183 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4184 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 4185 else 4186 ibmvfc_del_tgt(tgt); 4187 4188 tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 4189 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4190 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), 4191 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), 4192 ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status); 4193 break; 4194 } 4195 4196 kref_put(&tgt->kref, ibmvfc_release_tgt); 4197 ibmvfc_free_event(evt); 4198 wake_up(&vhost->work_wait_q); 4199 } 4200 4201 /** 4202 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 4203 * @tgt: ibmvfc target struct 4204 * 4205 **/ 4206 static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 4207 { 4208 struct ibmvfc_port_login *plogi; 4209 struct ibmvfc_host *vhost = tgt->vhost; 4210 struct ibmvfc_event *evt; 4211 4212 if (vhost->discovery_threads >= disc_threads) 4213 return; 4214 4215 kref_get(&tgt->kref); 4216 tgt->logo_rcvd = 0; 4217 evt = ibmvfc_get_reserved_event(&vhost->crq); 4218 if (!evt) { 4219 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4220 kref_put(&tgt->kref, ibmvfc_release_tgt); 4221 __ibmvfc_reset_host(vhost); 4222 return; 4223 } 4224 vhost->discovery_threads++; 4225 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4226 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 4227 evt->tgt = tgt; 4228 plogi = &evt->iu.plogi; 4229 memset(plogi, 0, sizeof(*plogi)); 4230 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 4231 plogi->common.version = cpu_to_be32(2); 4232 plogi->target_wwpn = cpu_to_be64(tgt->wwpn); 4233 } else { 4234 plogi->common.version = cpu_to_be32(1); 4235 } 4236 plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); 4237 plogi->common.length = cpu_to_be16(sizeof(*plogi)); 4238 plogi->scsi_id = cpu_to_be64(tgt->scsi_id); 4239 4240 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4241 vhost->discovery_threads--; 4242 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4243 kref_put(&tgt->kref, ibmvfc_release_tgt); 4244 } else 4245 tgt_dbg(tgt, "Sent port login\n"); 4246 } 4247 4248 /** 4249 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 4250 * @evt: ibmvfc event struct 4251 * 4252 **/ 4253 static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 4254 { 4255 struct ibmvfc_target *tgt = evt->tgt; 4256 struct ibmvfc_host *vhost = evt->vhost; 4257 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 4258 u32 status = be16_to_cpu(rsp->common.status); 4259 4260 vhost->discovery_threads--; 4261 ibmvfc_free_event(evt); 4262 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4263 4264 switch (status) { 4265 case IBMVFC_MAD_SUCCESS: 4266 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 4267 break; 4268 case IBMVFC_MAD_DRIVER_FAILED: 4269 kref_put(&tgt->kref, ibmvfc_release_tgt); 4270 wake_up(&vhost->work_wait_q); 4271 return; 4272 case IBMVFC_MAD_FAILED: 4273 default: 4274 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 4275 break; 4276 } 4277 4278 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 4279 kref_put(&tgt->kref, ibmvfc_release_tgt); 4280 wake_up(&vhost->work_wait_q); 4281 } 4282 4283 /** 4284 * __ibmvfc_tgt_get_implicit_logout_evt - Allocate and init an event for implicit logout 4285 * @tgt: ibmvfc target struct 4286 * @done: Routine to call when the event is responded to 4287 * 4288 * Returns: 4289 * Allocated and initialized ibmvfc_event struct 4290 **/ 4291 static struct ibmvfc_event *__ibmvfc_tgt_get_implicit_logout_evt(struct ibmvfc_target *tgt, 4292 void (*done) (struct ibmvfc_event *)) 4293 { 4294 struct ibmvfc_implicit_logout *mad; 4295 struct ibmvfc_host *vhost = tgt->vhost; 4296 struct ibmvfc_event *evt; 4297 4298 kref_get(&tgt->kref); 4299 evt = ibmvfc_get_reserved_event(&vhost->crq); 4300 if (!evt) 4301 return NULL; 4302 ibmvfc_init_event(evt, done, IBMVFC_MAD_FORMAT); 4303 evt->tgt = tgt; 4304 mad = &evt->iu.implicit_logout; 4305 memset(mad, 0, sizeof(*mad)); 4306 mad->common.version = cpu_to_be32(1); 4307 mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); 4308 mad->common.length = cpu_to_be16(sizeof(*mad)); 4309 mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); 4310 return evt; 4311 } 4312 4313 /** 4314 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 4315 * @tgt: ibmvfc target struct 4316 * 4317 **/ 4318 static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 4319 { 4320 struct ibmvfc_host *vhost = tgt->vhost; 4321 struct ibmvfc_event *evt; 4322 4323 if (vhost->discovery_threads >= disc_threads) 4324 return; 4325 4326 vhost->discovery_threads++; 4327 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, 4328 ibmvfc_tgt_implicit_logout_done); 4329 if (!evt) { 4330 vhost->discovery_threads--; 4331 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4332 kref_put(&tgt->kref, ibmvfc_release_tgt); 4333 __ibmvfc_reset_host(vhost); 4334 return; 4335 } 4336 4337 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4338 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4339 vhost->discovery_threads--; 4340 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4341 kref_put(&tgt->kref, ibmvfc_release_tgt); 4342 } else 4343 tgt_dbg(tgt, "Sent Implicit Logout\n"); 4344 } 4345 4346 /** 4347 * ibmvfc_tgt_implicit_logout_and_del_done - Completion handler for Implicit Logout MAD 4348 * @evt: ibmvfc event struct 4349 * 4350 **/ 4351 static void ibmvfc_tgt_implicit_logout_and_del_done(struct ibmvfc_event *evt) 4352 { 4353 struct ibmvfc_target *tgt = evt->tgt; 4354 struct ibmvfc_host *vhost = evt->vhost; 4355 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 4356 u32 status = be16_to_cpu(mad->common.status); 4357 4358 vhost->discovery_threads--; 4359 ibmvfc_free_event(evt); 4360 4361 /* 4362 * If our state is IBMVFC_HOST_OFFLINE, we could be unloading the 4363 * driver in which case we need to free up all the targets. If we are 4364 * not unloading, we will still go through a hard reset to get out of 4365 * offline state, so there is no need to track the old targets in that 4366 * case. 4367 */ 4368 if (status == IBMVFC_MAD_SUCCESS || vhost->state == IBMVFC_HOST_OFFLINE) 4369 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4370 else 4371 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT); 4372 4373 tgt_dbg(tgt, "Implicit Logout %s\n", (status == IBMVFC_MAD_SUCCESS) ? "succeeded" : "failed"); 4374 kref_put(&tgt->kref, ibmvfc_release_tgt); 4375 wake_up(&vhost->work_wait_q); 4376 } 4377 4378 /** 4379 * ibmvfc_tgt_implicit_logout_and_del - Initiate an Implicit Logout for specified target 4380 * @tgt: ibmvfc target struct 4381 * 4382 **/ 4383 static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *tgt) 4384 { 4385 struct ibmvfc_host *vhost = tgt->vhost; 4386 struct ibmvfc_event *evt; 4387 4388 if (!vhost->logged_in) { 4389 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4390 return; 4391 } 4392 4393 if (vhost->discovery_threads >= disc_threads) 4394 return; 4395 4396 vhost->discovery_threads++; 4397 evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, 4398 ibmvfc_tgt_implicit_logout_and_del_done); 4399 4400 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT); 4401 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4402 vhost->discovery_threads--; 4403 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4404 kref_put(&tgt->kref, ibmvfc_release_tgt); 4405 } else 4406 tgt_dbg(tgt, "Sent Implicit Logout\n"); 4407 } 4408 4409 /** 4410 * ibmvfc_tgt_move_login_done - Completion handler for Move Login 4411 * @evt: ibmvfc event struct 4412 * 4413 **/ 4414 static void ibmvfc_tgt_move_login_done(struct ibmvfc_event *evt) 4415 { 4416 struct ibmvfc_target *tgt = evt->tgt; 4417 struct ibmvfc_host *vhost = evt->vhost; 4418 struct ibmvfc_move_login *rsp = &evt->xfer_iu->move_login; 4419 u32 status = be16_to_cpu(rsp->common.status); 4420 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4421 4422 vhost->discovery_threads--; 4423 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4424 switch (status) { 4425 case IBMVFC_MAD_SUCCESS: 4426 tgt_dbg(tgt, "Move Login succeeded for new scsi_id: %llX\n", tgt->new_scsi_id); 4427 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 4428 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 4429 tgt->scsi_id = tgt->new_scsi_id; 4430 tgt->ids.port_id = tgt->scsi_id; 4431 memcpy(&tgt->service_parms, &rsp->service_parms, 4432 sizeof(tgt->service_parms)); 4433 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 4434 sizeof(tgt->service_parms_change)); 4435 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 4436 break; 4437 case IBMVFC_MAD_DRIVER_FAILED: 4438 break; 4439 case IBMVFC_MAD_CRQ_ERROR: 4440 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); 4441 break; 4442 case IBMVFC_MAD_FAILED: 4443 default: 4444 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); 4445 4446 tgt_log(tgt, level, 4447 "Move Login failed: new scsi_id: %llX, flags:%x, vios_flags:%x, rc=0x%02X\n", 4448 tgt->new_scsi_id, be32_to_cpu(rsp->flags), be16_to_cpu(rsp->vios_flags), 4449 status); 4450 break; 4451 } 4452 4453 kref_put(&tgt->kref, ibmvfc_release_tgt); 4454 ibmvfc_free_event(evt); 4455 wake_up(&vhost->work_wait_q); 4456 } 4457 4458 4459 /** 4460 * ibmvfc_tgt_move_login - Initiate a move login for specified target 4461 * @tgt: ibmvfc target struct 4462 * 4463 **/ 4464 static void ibmvfc_tgt_move_login(struct ibmvfc_target *tgt) 4465 { 4466 struct ibmvfc_host *vhost = tgt->vhost; 4467 struct ibmvfc_move_login *move; 4468 struct ibmvfc_event *evt; 4469 4470 if (vhost->discovery_threads >= disc_threads) 4471 return; 4472 4473 kref_get(&tgt->kref); 4474 evt = ibmvfc_get_reserved_event(&vhost->crq); 4475 if (!evt) { 4476 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4477 kref_put(&tgt->kref, ibmvfc_release_tgt); 4478 __ibmvfc_reset_host(vhost); 4479 return; 4480 } 4481 vhost->discovery_threads++; 4482 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4483 ibmvfc_init_event(evt, ibmvfc_tgt_move_login_done, IBMVFC_MAD_FORMAT); 4484 evt->tgt = tgt; 4485 move = &evt->iu.move_login; 4486 memset(move, 0, sizeof(*move)); 4487 move->common.version = cpu_to_be32(1); 4488 move->common.opcode = cpu_to_be32(IBMVFC_MOVE_LOGIN); 4489 move->common.length = cpu_to_be16(sizeof(*move)); 4490 4491 move->old_scsi_id = cpu_to_be64(tgt->scsi_id); 4492 move->new_scsi_id = cpu_to_be64(tgt->new_scsi_id); 4493 move->wwpn = cpu_to_be64(tgt->wwpn); 4494 move->node_name = cpu_to_be64(tgt->ids.node_name); 4495 4496 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4497 vhost->discovery_threads--; 4498 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 4499 kref_put(&tgt->kref, ibmvfc_release_tgt); 4500 } else 4501 tgt_dbg(tgt, "Sent Move Login for new scsi_id: %llX\n", tgt->new_scsi_id); 4502 } 4503 4504 /** 4505 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 4506 * @mad: ibmvfc passthru mad struct 4507 * @tgt: ibmvfc target struct 4508 * 4509 * Returns: 4510 * 1 if PLOGI needed / 0 if PLOGI not needed 4511 **/ 4512 static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 4513 struct ibmvfc_target *tgt) 4514 { 4515 if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name) 4516 return 1; 4517 if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name) 4518 return 1; 4519 if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) 4520 return 1; 4521 return 0; 4522 } 4523 4524 /** 4525 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 4526 * @evt: ibmvfc event struct 4527 * 4528 **/ 4529 static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 4530 { 4531 struct ibmvfc_target *tgt = evt->tgt; 4532 struct ibmvfc_host *vhost = evt->vhost; 4533 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 4534 u32 status = be16_to_cpu(mad->common.status); 4535 u8 fc_reason, fc_explain; 4536 4537 vhost->discovery_threads--; 4538 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4539 del_timer(&tgt->timer); 4540 4541 switch (status) { 4542 case IBMVFC_MAD_SUCCESS: 4543 tgt_dbg(tgt, "ADISC succeeded\n"); 4544 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 4545 ibmvfc_del_tgt(tgt); 4546 break; 4547 case IBMVFC_MAD_DRIVER_FAILED: 4548 break; 4549 case IBMVFC_MAD_FAILED: 4550 default: 4551 ibmvfc_del_tgt(tgt); 4552 fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; 4553 fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; 4554 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 4555 ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), 4556 be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error), 4557 ibmvfc_get_fc_type(fc_reason), fc_reason, 4558 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 4559 break; 4560 } 4561 4562 kref_put(&tgt->kref, ibmvfc_release_tgt); 4563 ibmvfc_free_event(evt); 4564 wake_up(&vhost->work_wait_q); 4565 } 4566 4567 /** 4568 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 4569 * @evt: ibmvfc event struct 4570 * 4571 **/ 4572 static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 4573 { 4574 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 4575 4576 memset(mad, 0, sizeof(*mad)); 4577 mad->common.version = cpu_to_be32(1); 4578 mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); 4579 mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); 4580 mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 4581 offsetof(struct ibmvfc_passthru_mad, iu)); 4582 mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); 4583 mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 4584 mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); 4585 mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 4586 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 4587 offsetof(struct ibmvfc_passthru_fc_iu, payload)); 4588 mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); 4589 mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + 4590 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 4591 offsetof(struct ibmvfc_passthru_fc_iu, response)); 4592 mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); 4593 } 4594 4595 /** 4596 * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC 4597 * @evt: ibmvfc event struct 4598 * 4599 * Just cleanup this event struct. Everything else is handled by 4600 * the ADISC completion handler. If the ADISC never actually comes 4601 * back, we still have the timer running on the ADISC event struct 4602 * which will fire and cause the CRQ to get reset. 4603 * 4604 **/ 4605 static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) 4606 { 4607 struct ibmvfc_host *vhost = evt->vhost; 4608 struct ibmvfc_target *tgt = evt->tgt; 4609 4610 tgt_dbg(tgt, "ADISC cancel complete\n"); 4611 vhost->abort_threads--; 4612 ibmvfc_free_event(evt); 4613 kref_put(&tgt->kref, ibmvfc_release_tgt); 4614 wake_up(&vhost->work_wait_q); 4615 } 4616 4617 /** 4618 * ibmvfc_adisc_timeout - Handle an ADISC timeout 4619 * @t: ibmvfc target struct 4620 * 4621 * If an ADISC times out, send a cancel. If the cancel times 4622 * out, reset the CRQ. When the ADISC comes back as cancelled, 4623 * log back into the target. 4624 **/ 4625 static void ibmvfc_adisc_timeout(struct timer_list *t) 4626 { 4627 struct ibmvfc_target *tgt = from_timer(tgt, t, timer); 4628 struct ibmvfc_host *vhost = tgt->vhost; 4629 struct ibmvfc_event *evt; 4630 struct ibmvfc_tmf *tmf; 4631 unsigned long flags; 4632 int rc; 4633 4634 tgt_dbg(tgt, "ADISC timeout\n"); 4635 spin_lock_irqsave(vhost->host->host_lock, flags); 4636 if (vhost->abort_threads >= disc_threads || 4637 tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || 4638 vhost->state != IBMVFC_INITIALIZING || 4639 vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { 4640 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4641 return; 4642 } 4643 4644 vhost->abort_threads++; 4645 kref_get(&tgt->kref); 4646 evt = ibmvfc_get_reserved_event(&vhost->crq); 4647 if (!evt) { 4648 tgt_err(tgt, "Failed to get cancel event for ADISC.\n"); 4649 vhost->abort_threads--; 4650 kref_put(&tgt->kref, ibmvfc_release_tgt); 4651 __ibmvfc_reset_host(vhost); 4652 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4653 return; 4654 } 4655 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); 4656 4657 evt->tgt = tgt; 4658 tmf = &evt->iu.tmf; 4659 memset(tmf, 0, sizeof(*tmf)); 4660 if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { 4661 tmf->common.version = cpu_to_be32(2); 4662 tmf->target_wwpn = cpu_to_be64(tgt->wwpn); 4663 } else { 4664 tmf->common.version = cpu_to_be32(1); 4665 } 4666 tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); 4667 tmf->common.length = cpu_to_be16(sizeof(*tmf)); 4668 tmf->scsi_id = cpu_to_be64(tgt->scsi_id); 4669 tmf->cancel_key = cpu_to_be32(tgt->cancel_key); 4670 4671 rc = ibmvfc_send_event(evt, vhost, default_timeout); 4672 4673 if (rc) { 4674 tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); 4675 vhost->abort_threads--; 4676 kref_put(&tgt->kref, ibmvfc_release_tgt); 4677 __ibmvfc_reset_host(vhost); 4678 } else 4679 tgt_dbg(tgt, "Attempting to cancel ADISC\n"); 4680 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4681 } 4682 4683 /** 4684 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 4685 * @tgt: ibmvfc target struct 4686 * 4687 * When sending an ADISC we end up with two timers running. The 4688 * first timer is the timer in the ibmvfc target struct. If this 4689 * fires, we send a cancel to the target. The second timer is the 4690 * timer on the ibmvfc event for the ADISC, which is longer. If that 4691 * fires, it means the ADISC timed out and our attempt to cancel it 4692 * also failed, so we need to reset the CRQ. 4693 **/ 4694 static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 4695 { 4696 struct ibmvfc_passthru_mad *mad; 4697 struct ibmvfc_host *vhost = tgt->vhost; 4698 struct ibmvfc_event *evt; 4699 4700 if (vhost->discovery_threads >= disc_threads) 4701 return; 4702 4703 kref_get(&tgt->kref); 4704 evt = ibmvfc_get_reserved_event(&vhost->crq); 4705 if (!evt) { 4706 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4707 kref_put(&tgt->kref, ibmvfc_release_tgt); 4708 __ibmvfc_reset_host(vhost); 4709 return; 4710 } 4711 vhost->discovery_threads++; 4712 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 4713 evt->tgt = tgt; 4714 4715 ibmvfc_init_passthru(evt); 4716 mad = &evt->iu.passthru; 4717 mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); 4718 mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); 4719 mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); 4720 4721 mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); 4722 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 4723 sizeof(vhost->login_buf->resp.port_name)); 4724 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 4725 sizeof(vhost->login_buf->resp.node_name)); 4726 mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); 4727 4728 if (timer_pending(&tgt->timer)) 4729 mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); 4730 else { 4731 tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); 4732 add_timer(&tgt->timer); 4733 } 4734 4735 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4736 if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { 4737 vhost->discovery_threads--; 4738 del_timer(&tgt->timer); 4739 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4740 kref_put(&tgt->kref, ibmvfc_release_tgt); 4741 } else 4742 tgt_dbg(tgt, "Sent ADISC\n"); 4743 } 4744 4745 /** 4746 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 4747 * @evt: ibmvfc event struct 4748 * 4749 **/ 4750 static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 4751 { 4752 struct ibmvfc_target *tgt = evt->tgt; 4753 struct ibmvfc_host *vhost = evt->vhost; 4754 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 4755 u32 status = be16_to_cpu(rsp->common.status); 4756 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4757 4758 vhost->discovery_threads--; 4759 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4760 switch (status) { 4761 case IBMVFC_MAD_SUCCESS: 4762 tgt_dbg(tgt, "Query Target succeeded\n"); 4763 if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) 4764 ibmvfc_del_tgt(tgt); 4765 else 4766 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 4767 break; 4768 case IBMVFC_MAD_DRIVER_FAILED: 4769 break; 4770 case IBMVFC_MAD_CRQ_ERROR: 4771 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 4772 break; 4773 case IBMVFC_MAD_FAILED: 4774 default: 4775 if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 4776 be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && 4777 be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) 4778 ibmvfc_del_tgt(tgt); 4779 else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 4780 level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 4781 else 4782 ibmvfc_del_tgt(tgt); 4783 4784 tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 4785 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4786 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), 4787 ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), 4788 ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), 4789 status); 4790 break; 4791 } 4792 4793 kref_put(&tgt->kref, ibmvfc_release_tgt); 4794 ibmvfc_free_event(evt); 4795 wake_up(&vhost->work_wait_q); 4796 } 4797 4798 /** 4799 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 4800 * @tgt: ibmvfc target struct 4801 * 4802 **/ 4803 static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 4804 { 4805 struct ibmvfc_query_tgt *query_tgt; 4806 struct ibmvfc_host *vhost = tgt->vhost; 4807 struct ibmvfc_event *evt; 4808 4809 if (vhost->discovery_threads >= disc_threads) 4810 return; 4811 4812 kref_get(&tgt->kref); 4813 evt = ibmvfc_get_reserved_event(&vhost->crq); 4814 if (!evt) { 4815 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4816 kref_put(&tgt->kref, ibmvfc_release_tgt); 4817 __ibmvfc_reset_host(vhost); 4818 return; 4819 } 4820 vhost->discovery_threads++; 4821 evt->tgt = tgt; 4822 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 4823 query_tgt = &evt->iu.query_tgt; 4824 memset(query_tgt, 0, sizeof(*query_tgt)); 4825 query_tgt->common.version = cpu_to_be32(1); 4826 query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); 4827 query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); 4828 query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); 4829 4830 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 4831 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 4832 vhost->discovery_threads--; 4833 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 4834 kref_put(&tgt->kref, ibmvfc_release_tgt); 4835 } else 4836 tgt_dbg(tgt, "Sent Query Target\n"); 4837 } 4838 4839 /** 4840 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 4841 * @vhost: ibmvfc host struct 4842 * @target: Holds SCSI ID to allocate target forand the WWPN 4843 * 4844 * Returns: 4845 * 0 on success / other on failure 4846 **/ 4847 static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, 4848 struct ibmvfc_discover_targets_entry *target) 4849 { 4850 struct ibmvfc_target *stgt = NULL; 4851 struct ibmvfc_target *wtgt = NULL; 4852 struct ibmvfc_target *tgt; 4853 unsigned long flags; 4854 u64 scsi_id = be32_to_cpu(target->scsi_id) & IBMVFC_DISC_TGT_SCSI_ID_MASK; 4855 u64 wwpn = be64_to_cpu(target->wwpn); 4856 4857 /* Look to see if we already have a target allocated for this SCSI ID or WWPN */ 4858 spin_lock_irqsave(vhost->host->host_lock, flags); 4859 list_for_each_entry(tgt, &vhost->targets, queue) { 4860 if (tgt->wwpn == wwpn) { 4861 wtgt = tgt; 4862 break; 4863 } 4864 } 4865 4866 list_for_each_entry(tgt, &vhost->targets, queue) { 4867 if (tgt->scsi_id == scsi_id) { 4868 stgt = tgt; 4869 break; 4870 } 4871 } 4872 4873 if (wtgt && !stgt) { 4874 /* 4875 * A WWPN target has moved and we still are tracking the old 4876 * SCSI ID. The only way we should be able to get here is if 4877 * we attempted to send an implicit logout for the old SCSI ID 4878 * and it failed for some reason, such as there being I/O 4879 * pending to the target. In this case, we will have already 4880 * deleted the rport from the FC transport so we do a move 4881 * login, which works even with I/O pending, however, if 4882 * there is still I/O pending, it will stay outstanding, so 4883 * we only do this if fast fail is disabled for the rport, 4884 * otherwise we let terminate_rport_io clean up the port 4885 * before we login at the new location. 4886 */ 4887 if (wtgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { 4888 if (wtgt->move_login) { 4889 /* 4890 * Do a move login here. The old target is no longer 4891 * known to the transport layer We don't use the 4892 * normal ibmvfc_set_tgt_action to set this, as we 4893 * don't normally want to allow this state change. 4894 */ 4895 wtgt->new_scsi_id = scsi_id; 4896 wtgt->action = IBMVFC_TGT_ACTION_INIT; 4897 wtgt->init_retries = 0; 4898 ibmvfc_init_tgt(wtgt, ibmvfc_tgt_move_login); 4899 } 4900 goto unlock_out; 4901 } else { 4902 tgt_err(wtgt, "Unexpected target state: %d, %p\n", 4903 wtgt->action, wtgt->rport); 4904 } 4905 } else if (stgt) { 4906 if (tgt->need_login) 4907 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 4908 goto unlock_out; 4909 } 4910 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4911 4912 tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); 4913 memset(tgt, 0, sizeof(*tgt)); 4914 tgt->scsi_id = scsi_id; 4915 tgt->wwpn = wwpn; 4916 tgt->vhost = vhost; 4917 tgt->need_login = 1; 4918 timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0); 4919 kref_init(&tgt->kref); 4920 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 4921 spin_lock_irqsave(vhost->host->host_lock, flags); 4922 tgt->cancel_key = vhost->task_set++; 4923 list_add_tail(&tgt->queue, &vhost->targets); 4924 4925 unlock_out: 4926 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4927 return 0; 4928 } 4929 4930 /** 4931 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 4932 * @vhost: ibmvfc host struct 4933 * 4934 * Returns: 4935 * 0 on success / other on failure 4936 **/ 4937 static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 4938 { 4939 int i, rc; 4940 4941 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 4942 rc = ibmvfc_alloc_target(vhost, &vhost->scsi_scrqs.disc_buf[i]); 4943 4944 return rc; 4945 } 4946 4947 /** 4948 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 4949 * @evt: ibmvfc event struct 4950 * 4951 **/ 4952 static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 4953 { 4954 struct ibmvfc_host *vhost = evt->vhost; 4955 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 4956 u32 mad_status = be16_to_cpu(rsp->common.status); 4957 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4958 4959 switch (mad_status) { 4960 case IBMVFC_MAD_SUCCESS: 4961 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 4962 vhost->num_targets = be32_to_cpu(rsp->num_written); 4963 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 4964 break; 4965 case IBMVFC_MAD_FAILED: 4966 level += ibmvfc_retry_host_init(vhost); 4967 ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", 4968 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 4969 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); 4970 break; 4971 case IBMVFC_MAD_DRIVER_FAILED: 4972 break; 4973 default: 4974 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 4975 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 4976 break; 4977 } 4978 4979 ibmvfc_free_event(evt); 4980 wake_up(&vhost->work_wait_q); 4981 } 4982 4983 /** 4984 * ibmvfc_discover_targets - Send Discover Targets MAD 4985 * @vhost: ibmvfc host struct 4986 * 4987 **/ 4988 static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 4989 { 4990 struct ibmvfc_discover_targets *mad; 4991 struct ibmvfc_event *evt = ibmvfc_get_reserved_event(&vhost->crq); 4992 int level = IBMVFC_DEFAULT_LOG_LEVEL; 4993 4994 if (!evt) { 4995 ibmvfc_log(vhost, level, "Discover Targets failed: no available events\n"); 4996 ibmvfc_hard_reset_host(vhost); 4997 return; 4998 } 4999 5000 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 5001 mad = &evt->iu.discover_targets; 5002 memset(mad, 0, sizeof(*mad)); 5003 mad->common.version = cpu_to_be32(1); 5004 mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); 5005 mad->common.length = cpu_to_be16(sizeof(*mad)); 5006 mad->bufflen = cpu_to_be32(vhost->scsi_scrqs.disc_buf_sz); 5007 mad->buffer.va = cpu_to_be64(vhost->scsi_scrqs.disc_buf_dma); 5008 mad->buffer.len = cpu_to_be32(vhost->scsi_scrqs.disc_buf_sz); 5009 mad->flags = cpu_to_be32(IBMVFC_DISC_TGT_PORT_ID_WWPN_LIST); 5010 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 5011 5012 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5013 ibmvfc_dbg(vhost, "Sent discover targets\n"); 5014 else 5015 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5016 } 5017 5018 static void ibmvfc_channel_setup_done(struct ibmvfc_event *evt) 5019 { 5020 struct ibmvfc_host *vhost = evt->vhost; 5021 struct ibmvfc_channel_setup *setup = vhost->channel_setup_buf; 5022 struct ibmvfc_channels *scrqs = &vhost->scsi_scrqs; 5023 u32 mad_status = be16_to_cpu(evt->xfer_iu->channel_setup.common.status); 5024 int level = IBMVFC_DEFAULT_LOG_LEVEL; 5025 int flags, active_queues, i; 5026 5027 ibmvfc_free_event(evt); 5028 5029 switch (mad_status) { 5030 case IBMVFC_MAD_SUCCESS: 5031 ibmvfc_dbg(vhost, "Channel Setup succeeded\n"); 5032 flags = be32_to_cpu(setup->flags); 5033 vhost->do_enquiry = 0; 5034 active_queues = be32_to_cpu(setup->num_scsi_subq_channels); 5035 scrqs->active_queues = active_queues; 5036 5037 if (flags & IBMVFC_CHANNELS_CANCELED) { 5038 ibmvfc_dbg(vhost, "Channels Canceled\n"); 5039 vhost->using_channels = 0; 5040 } else { 5041 if (active_queues) 5042 vhost->using_channels = 1; 5043 for (i = 0; i < active_queues; i++) 5044 scrqs->scrqs[i].vios_cookie = 5045 be64_to_cpu(setup->channel_handles[i]); 5046 5047 ibmvfc_dbg(vhost, "Using %u channels\n", 5048 vhost->scsi_scrqs.active_queues); 5049 } 5050 break; 5051 case IBMVFC_MAD_FAILED: 5052 level += ibmvfc_retry_host_init(vhost); 5053 ibmvfc_log(vhost, level, "Channel Setup failed\n"); 5054 fallthrough; 5055 case IBMVFC_MAD_DRIVER_FAILED: 5056 return; 5057 default: 5058 dev_err(vhost->dev, "Invalid Channel Setup response: 0x%x\n", 5059 mad_status); 5060 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5061 return; 5062 } 5063 5064 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 5065 wake_up(&vhost->work_wait_q); 5066 } 5067 5068 static void ibmvfc_channel_setup(struct ibmvfc_host *vhost) 5069 { 5070 struct ibmvfc_channel_setup_mad *mad; 5071 struct ibmvfc_channel_setup *setup_buf = vhost->channel_setup_buf; 5072 struct ibmvfc_event *evt = ibmvfc_get_reserved_event(&vhost->crq); 5073 struct ibmvfc_channels *scrqs = &vhost->scsi_scrqs; 5074 unsigned int num_channels = 5075 min(scrqs->desired_queues, vhost->max_vios_scsi_channels); 5076 int level = IBMVFC_DEFAULT_LOG_LEVEL; 5077 int i; 5078 5079 if (!evt) { 5080 ibmvfc_log(vhost, level, "Channel Setup failed: no available events\n"); 5081 ibmvfc_hard_reset_host(vhost); 5082 return; 5083 } 5084 5085 memset(setup_buf, 0, sizeof(*setup_buf)); 5086 if (num_channels == 0) 5087 setup_buf->flags = cpu_to_be32(IBMVFC_CANCEL_CHANNELS); 5088 else { 5089 setup_buf->num_scsi_subq_channels = cpu_to_be32(num_channels); 5090 for (i = 0; i < num_channels; i++) 5091 setup_buf->channel_handles[i] = cpu_to_be64(scrqs->scrqs[i].cookie); 5092 } 5093 5094 ibmvfc_init_event(evt, ibmvfc_channel_setup_done, IBMVFC_MAD_FORMAT); 5095 mad = &evt->iu.channel_setup; 5096 memset(mad, 0, sizeof(*mad)); 5097 mad->common.version = cpu_to_be32(1); 5098 mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_SETUP); 5099 mad->common.length = cpu_to_be16(sizeof(*mad)); 5100 mad->buffer.va = cpu_to_be64(vhost->channel_setup_dma); 5101 mad->buffer.len = cpu_to_be32(sizeof(*vhost->channel_setup_buf)); 5102 5103 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 5104 5105 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5106 ibmvfc_dbg(vhost, "Sent channel setup\n"); 5107 else 5108 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 5109 } 5110 5111 static void ibmvfc_channel_enquiry_done(struct ibmvfc_event *evt) 5112 { 5113 struct ibmvfc_host *vhost = evt->vhost; 5114 struct ibmvfc_channel_enquiry *rsp = &evt->xfer_iu->channel_enquiry; 5115 u32 mad_status = be16_to_cpu(rsp->common.status); 5116 int level = IBMVFC_DEFAULT_LOG_LEVEL; 5117 5118 switch (mad_status) { 5119 case IBMVFC_MAD_SUCCESS: 5120 ibmvfc_dbg(vhost, "Channel Enquiry succeeded\n"); 5121 vhost->max_vios_scsi_channels = be32_to_cpu(rsp->num_scsi_subq_channels); 5122 ibmvfc_free_event(evt); 5123 break; 5124 case IBMVFC_MAD_FAILED: 5125 level += ibmvfc_retry_host_init(vhost); 5126 ibmvfc_log(vhost, level, "Channel Enquiry failed\n"); 5127 fallthrough; 5128 case IBMVFC_MAD_DRIVER_FAILED: 5129 ibmvfc_free_event(evt); 5130 return; 5131 default: 5132 dev_err(vhost->dev, "Invalid Channel Enquiry response: 0x%x\n", 5133 mad_status); 5134 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5135 ibmvfc_free_event(evt); 5136 return; 5137 } 5138 5139 ibmvfc_channel_setup(vhost); 5140 } 5141 5142 static void ibmvfc_channel_enquiry(struct ibmvfc_host *vhost) 5143 { 5144 struct ibmvfc_channel_enquiry *mad; 5145 struct ibmvfc_event *evt = ibmvfc_get_reserved_event(&vhost->crq); 5146 int level = IBMVFC_DEFAULT_LOG_LEVEL; 5147 5148 if (!evt) { 5149 ibmvfc_log(vhost, level, "Channel Enquiry failed: no available events\n"); 5150 ibmvfc_hard_reset_host(vhost); 5151 return; 5152 } 5153 5154 ibmvfc_init_event(evt, ibmvfc_channel_enquiry_done, IBMVFC_MAD_FORMAT); 5155 mad = &evt->iu.channel_enquiry; 5156 memset(mad, 0, sizeof(*mad)); 5157 mad->common.version = cpu_to_be32(1); 5158 mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_ENQUIRY); 5159 mad->common.length = cpu_to_be16(sizeof(*mad)); 5160 5161 if (mig_channels_only) 5162 mad->flags |= cpu_to_be32(IBMVFC_NO_CHANNELS_TO_CRQ_SUPPORT); 5163 if (mig_no_less_channels) 5164 mad->flags |= cpu_to_be32(IBMVFC_NO_N_TO_M_CHANNELS_SUPPORT); 5165 5166 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 5167 5168 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5169 ibmvfc_dbg(vhost, "Send channel enquiry\n"); 5170 else 5171 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5172 } 5173 5174 /** 5175 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 5176 * @evt: ibmvfc event struct 5177 * 5178 **/ 5179 static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 5180 { 5181 struct ibmvfc_host *vhost = evt->vhost; 5182 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); 5183 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 5184 unsigned int npiv_max_sectors; 5185 int level = IBMVFC_DEFAULT_LOG_LEVEL; 5186 5187 switch (mad_status) { 5188 case IBMVFC_MAD_SUCCESS: 5189 ibmvfc_free_event(evt); 5190 break; 5191 case IBMVFC_MAD_FAILED: 5192 if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) 5193 level += ibmvfc_retry_host_init(vhost); 5194 else 5195 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5196 ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", 5197 ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), 5198 be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); 5199 ibmvfc_free_event(evt); 5200 return; 5201 case IBMVFC_MAD_CRQ_ERROR: 5202 ibmvfc_retry_host_init(vhost); 5203 fallthrough; 5204 case IBMVFC_MAD_DRIVER_FAILED: 5205 ibmvfc_free_event(evt); 5206 return; 5207 default: 5208 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 5209 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5210 ibmvfc_free_event(evt); 5211 return; 5212 } 5213 5214 vhost->client_migrated = 0; 5215 5216 if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { 5217 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 5218 rsp->flags); 5219 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5220 wake_up(&vhost->work_wait_q); 5221 return; 5222 } 5223 5224 if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { 5225 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 5226 rsp->max_cmds); 5227 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5228 wake_up(&vhost->work_wait_q); 5229 return; 5230 } 5231 5232 vhost->logged_in = 1; 5233 npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); 5234 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 5235 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 5236 rsp->drc_name, npiv_max_sectors); 5237 5238 fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); 5239 fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); 5240 fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); 5241 fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); 5242 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 5243 fc_host_supported_classes(vhost->host) = 0; 5244 if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) 5245 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 5246 if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) 5247 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 5248 if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) 5249 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 5250 fc_host_maxframe_size(vhost->host) = 5251 be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; 5252 5253 vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; 5254 vhost->host->max_sectors = npiv_max_sectors; 5255 5256 if (ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPORT_CHANNELS) && vhost->do_enquiry) { 5257 ibmvfc_channel_enquiry(vhost); 5258 } else { 5259 vhost->do_enquiry = 0; 5260 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 5261 wake_up(&vhost->work_wait_q); 5262 } 5263 } 5264 5265 /** 5266 * ibmvfc_npiv_login - Sends NPIV login 5267 * @vhost: ibmvfc host struct 5268 * 5269 **/ 5270 static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 5271 { 5272 struct ibmvfc_npiv_login_mad *mad; 5273 struct ibmvfc_event *evt = ibmvfc_get_reserved_event(&vhost->crq); 5274 5275 if (!evt) { 5276 ibmvfc_dbg(vhost, "NPIV Login failed: no available events\n"); 5277 ibmvfc_hard_reset_host(vhost); 5278 return; 5279 } 5280 5281 ibmvfc_gather_partition_info(vhost); 5282 ibmvfc_set_login_info(vhost); 5283 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 5284 5285 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 5286 mad = &evt->iu.npiv_login; 5287 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 5288 mad->common.version = cpu_to_be32(1); 5289 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); 5290 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); 5291 mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); 5292 mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); 5293 5294 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 5295 5296 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5297 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 5298 else 5299 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5300 } 5301 5302 /** 5303 * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout 5304 * @evt: ibmvfc event struct 5305 * 5306 **/ 5307 static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) 5308 { 5309 struct ibmvfc_host *vhost = evt->vhost; 5310 u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); 5311 5312 ibmvfc_free_event(evt); 5313 5314 switch (mad_status) { 5315 case IBMVFC_MAD_SUCCESS: 5316 if (list_empty(&vhost->crq.sent) && 5317 vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { 5318 ibmvfc_init_host(vhost); 5319 return; 5320 } 5321 break; 5322 case IBMVFC_MAD_FAILED: 5323 case IBMVFC_MAD_NOT_SUPPORTED: 5324 case IBMVFC_MAD_CRQ_ERROR: 5325 case IBMVFC_MAD_DRIVER_FAILED: 5326 default: 5327 ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); 5328 break; 5329 } 5330 5331 ibmvfc_hard_reset_host(vhost); 5332 } 5333 5334 /** 5335 * ibmvfc_npiv_logout - Issue an NPIV Logout 5336 * @vhost: ibmvfc host struct 5337 * 5338 **/ 5339 static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) 5340 { 5341 struct ibmvfc_npiv_logout_mad *mad; 5342 struct ibmvfc_event *evt; 5343 5344 evt = ibmvfc_get_reserved_event(&vhost->crq); 5345 if (!evt) { 5346 ibmvfc_dbg(vhost, "NPIV Logout failed: no available events\n"); 5347 ibmvfc_hard_reset_host(vhost); 5348 return; 5349 } 5350 5351 ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); 5352 5353 mad = &evt->iu.npiv_logout; 5354 memset(mad, 0, sizeof(*mad)); 5355 mad->common.version = cpu_to_be32(1); 5356 mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); 5357 mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); 5358 5359 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); 5360 5361 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 5362 ibmvfc_dbg(vhost, "Sent NPIV logout\n"); 5363 else 5364 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5365 } 5366 5367 /** 5368 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 5369 * @vhost: ibmvfc host struct 5370 * 5371 * Returns: 5372 * 1 if work to do / 0 if not 5373 **/ 5374 static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 5375 { 5376 struct ibmvfc_target *tgt; 5377 5378 list_for_each_entry(tgt, &vhost->targets, queue) { 5379 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 5380 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 5381 return 1; 5382 } 5383 5384 return 0; 5385 } 5386 5387 /** 5388 * ibmvfc_dev_logo_to_do - Is there target logout work to do? 5389 * @vhost: ibmvfc host struct 5390 * 5391 * Returns: 5392 * 1 if work to do / 0 if not 5393 **/ 5394 static int ibmvfc_dev_logo_to_do(struct ibmvfc_host *vhost) 5395 { 5396 struct ibmvfc_target *tgt; 5397 5398 list_for_each_entry(tgt, &vhost->targets, queue) { 5399 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT || 5400 tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) 5401 return 1; 5402 } 5403 return 0; 5404 } 5405 5406 /** 5407 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 5408 * @vhost: ibmvfc host struct 5409 * 5410 * Returns: 5411 * 1 if work to do / 0 if not 5412 **/ 5413 static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 5414 { 5415 struct ibmvfc_target *tgt; 5416 5417 if (kthread_should_stop()) 5418 return 1; 5419 switch (vhost->action) { 5420 case IBMVFC_HOST_ACTION_NONE: 5421 case IBMVFC_HOST_ACTION_INIT_WAIT: 5422 case IBMVFC_HOST_ACTION_LOGO_WAIT: 5423 return 0; 5424 case IBMVFC_HOST_ACTION_TGT_INIT: 5425 case IBMVFC_HOST_ACTION_QUERY_TGTS: 5426 if (vhost->discovery_threads == disc_threads) 5427 return 0; 5428 list_for_each_entry(tgt, &vhost->targets, queue) 5429 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 5430 return 1; 5431 list_for_each_entry(tgt, &vhost->targets, queue) 5432 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 5433 return 0; 5434 return 1; 5435 case IBMVFC_HOST_ACTION_TGT_DEL: 5436 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 5437 if (vhost->discovery_threads == disc_threads) 5438 return 0; 5439 list_for_each_entry(tgt, &vhost->targets, queue) 5440 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) 5441 return 1; 5442 list_for_each_entry(tgt, &vhost->targets, queue) 5443 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) 5444 return 0; 5445 return 1; 5446 case IBMVFC_HOST_ACTION_LOGO: 5447 case IBMVFC_HOST_ACTION_INIT: 5448 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 5449 case IBMVFC_HOST_ACTION_QUERY: 5450 case IBMVFC_HOST_ACTION_RESET: 5451 case IBMVFC_HOST_ACTION_REENABLE: 5452 default: 5453 break; 5454 } 5455 5456 return 1; 5457 } 5458 5459 /** 5460 * ibmvfc_work_to_do - Is there task level work to do? 5461 * @vhost: ibmvfc host struct 5462 * 5463 * Returns: 5464 * 1 if work to do / 0 if not 5465 **/ 5466 static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 5467 { 5468 unsigned long flags; 5469 int rc; 5470 5471 spin_lock_irqsave(vhost->host->host_lock, flags); 5472 rc = __ibmvfc_work_to_do(vhost); 5473 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5474 return rc; 5475 } 5476 5477 /** 5478 * ibmvfc_log_ae - Log async events if necessary 5479 * @vhost: ibmvfc host struct 5480 * @events: events to log 5481 * 5482 **/ 5483 static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 5484 { 5485 if (events & IBMVFC_AE_RSCN) 5486 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 5487 if ((events & IBMVFC_AE_LINKDOWN) && 5488 vhost->state >= IBMVFC_HALTED) 5489 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 5490 if ((events & IBMVFC_AE_LINKUP) && 5491 vhost->state == IBMVFC_INITIALIZING) 5492 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 5493 } 5494 5495 /** 5496 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 5497 * @tgt: ibmvfc target struct 5498 * 5499 **/ 5500 static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 5501 { 5502 struct ibmvfc_host *vhost = tgt->vhost; 5503 struct fc_rport *rport; 5504 unsigned long flags; 5505 5506 tgt_dbg(tgt, "Adding rport\n"); 5507 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 5508 spin_lock_irqsave(vhost->host->host_lock, flags); 5509 5510 if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 5511 tgt_dbg(tgt, "Deleting rport\n"); 5512 list_del(&tgt->queue); 5513 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 5514 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5515 fc_remote_port_delete(rport); 5516 del_timer_sync(&tgt->timer); 5517 kref_put(&tgt->kref, ibmvfc_release_tgt); 5518 return; 5519 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 5520 tgt_dbg(tgt, "Deleting rport with outstanding I/O\n"); 5521 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); 5522 tgt->rport = NULL; 5523 tgt->init_retries = 0; 5524 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5525 fc_remote_port_delete(rport); 5526 return; 5527 } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { 5528 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5529 return; 5530 } 5531 5532 if (rport) { 5533 tgt_dbg(tgt, "rport add succeeded\n"); 5534 tgt->rport = rport; 5535 rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; 5536 rport->supported_classes = 0; 5537 tgt->target_id = rport->scsi_target_id; 5538 if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) 5539 rport->supported_classes |= FC_COS_CLASS1; 5540 if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) 5541 rport->supported_classes |= FC_COS_CLASS2; 5542 if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) 5543 rport->supported_classes |= FC_COS_CLASS3; 5544 if (rport->rqst_q) 5545 blk_queue_max_segments(rport->rqst_q, 1); 5546 } else 5547 tgt_dbg(tgt, "rport add failed\n"); 5548 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5549 } 5550 5551 /** 5552 * ibmvfc_do_work - Do task level work 5553 * @vhost: ibmvfc host struct 5554 * 5555 **/ 5556 static void ibmvfc_do_work(struct ibmvfc_host *vhost) 5557 { 5558 struct ibmvfc_target *tgt; 5559 unsigned long flags; 5560 struct fc_rport *rport; 5561 LIST_HEAD(purge); 5562 int rc; 5563 5564 ibmvfc_log_ae(vhost, vhost->events_to_log); 5565 spin_lock_irqsave(vhost->host->host_lock, flags); 5566 vhost->events_to_log = 0; 5567 switch (vhost->action) { 5568 case IBMVFC_HOST_ACTION_NONE: 5569 case IBMVFC_HOST_ACTION_LOGO_WAIT: 5570 case IBMVFC_HOST_ACTION_INIT_WAIT: 5571 break; 5572 case IBMVFC_HOST_ACTION_RESET: 5573 list_splice_init(&vhost->purge, &purge); 5574 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5575 ibmvfc_complete_purge(&purge); 5576 rc = ibmvfc_reset_crq(vhost); 5577 5578 spin_lock_irqsave(vhost->host->host_lock, flags); 5579 if (!rc || rc == H_CLOSED) 5580 vio_enable_interrupts(to_vio_dev(vhost->dev)); 5581 if (vhost->action == IBMVFC_HOST_ACTION_RESET) { 5582 /* 5583 * The only action we could have changed to would have 5584 * been reenable, in which case, we skip the rest of 5585 * this path and wait until we've done the re-enable 5586 * before sending the crq init. 5587 */ 5588 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 5589 5590 if (rc || (rc = ibmvfc_send_crq_init(vhost)) || 5591 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 5592 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5593 dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); 5594 } 5595 } 5596 break; 5597 case IBMVFC_HOST_ACTION_REENABLE: 5598 list_splice_init(&vhost->purge, &purge); 5599 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5600 ibmvfc_complete_purge(&purge); 5601 rc = ibmvfc_reenable_crq_queue(vhost); 5602 5603 spin_lock_irqsave(vhost->host->host_lock, flags); 5604 if (vhost->action == IBMVFC_HOST_ACTION_REENABLE) { 5605 /* 5606 * The only action we could have changed to would have 5607 * been reset, in which case, we skip the rest of this 5608 * path and wait until we've done the reset before 5609 * sending the crq init. 5610 */ 5611 vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; 5612 if (rc || (rc = ibmvfc_send_crq_init(vhost))) { 5613 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 5614 dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); 5615 } 5616 } 5617 break; 5618 case IBMVFC_HOST_ACTION_LOGO: 5619 vhost->job_step(vhost); 5620 break; 5621 case IBMVFC_HOST_ACTION_INIT: 5622 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 5623 if (vhost->delay_init) { 5624 vhost->delay_init = 0; 5625 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5626 ssleep(15); 5627 return; 5628 } else 5629 vhost->job_step(vhost); 5630 break; 5631 case IBMVFC_HOST_ACTION_QUERY: 5632 list_for_each_entry(tgt, &vhost->targets, queue) 5633 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 5634 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 5635 break; 5636 case IBMVFC_HOST_ACTION_QUERY_TGTS: 5637 list_for_each_entry(tgt, &vhost->targets, queue) { 5638 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 5639 tgt->job_step(tgt); 5640 break; 5641 } 5642 } 5643 5644 if (!ibmvfc_dev_init_to_do(vhost)) 5645 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 5646 break; 5647 case IBMVFC_HOST_ACTION_TGT_DEL: 5648 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 5649 list_for_each_entry(tgt, &vhost->targets, queue) { 5650 if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { 5651 tgt->job_step(tgt); 5652 break; 5653 } 5654 } 5655 5656 if (ibmvfc_dev_logo_to_do(vhost)) { 5657 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5658 return; 5659 } 5660 5661 list_for_each_entry(tgt, &vhost->targets, queue) { 5662 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 5663 tgt_dbg(tgt, "Deleting rport\n"); 5664 rport = tgt->rport; 5665 tgt->rport = NULL; 5666 list_del(&tgt->queue); 5667 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); 5668 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5669 if (rport) 5670 fc_remote_port_delete(rport); 5671 del_timer_sync(&tgt->timer); 5672 kref_put(&tgt->kref, ibmvfc_release_tgt); 5673 return; 5674 } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { 5675 tgt_dbg(tgt, "Deleting rport with I/O outstanding\n"); 5676 rport = tgt->rport; 5677 tgt->rport = NULL; 5678 tgt->init_retries = 0; 5679 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); 5680 5681 /* 5682 * If fast fail is enabled, we wait for it to fire and then clean up 5683 * the old port, since we expect the fast fail timer to clean up the 5684 * outstanding I/O faster than waiting for normal command timeouts. 5685 * However, if fast fail is disabled, any I/O outstanding to the 5686 * rport LUNs will stay outstanding indefinitely, since the EH handlers 5687 * won't get invoked for I/O's timing out. If this is a NPIV failover 5688 * scenario, the better alternative is to use the move login. 5689 */ 5690 if (rport && rport->fast_io_fail_tmo == -1) 5691 tgt->move_login = 1; 5692 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5693 if (rport) 5694 fc_remote_port_delete(rport); 5695 return; 5696 } 5697 } 5698 5699 if (vhost->state == IBMVFC_INITIALIZING) { 5700 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 5701 if (vhost->reinit) { 5702 vhost->reinit = 0; 5703 scsi_block_requests(vhost->host); 5704 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 5705 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5706 } else { 5707 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 5708 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 5709 wake_up(&vhost->init_wait_q); 5710 schedule_work(&vhost->rport_add_work_q); 5711 vhost->init_retries = 0; 5712 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5713 scsi_unblock_requests(vhost->host); 5714 } 5715 5716 return; 5717 } else { 5718 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 5719 vhost->job_step = ibmvfc_discover_targets; 5720 } 5721 } else { 5722 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 5723 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5724 scsi_unblock_requests(vhost->host); 5725 wake_up(&vhost->init_wait_q); 5726 return; 5727 } 5728 break; 5729 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 5730 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 5731 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5732 ibmvfc_alloc_targets(vhost); 5733 spin_lock_irqsave(vhost->host->host_lock, flags); 5734 break; 5735 case IBMVFC_HOST_ACTION_TGT_INIT: 5736 list_for_each_entry(tgt, &vhost->targets, queue) { 5737 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 5738 tgt->job_step(tgt); 5739 break; 5740 } 5741 } 5742 5743 if (!ibmvfc_dev_init_to_do(vhost)) 5744 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 5745 break; 5746 default: 5747 break; 5748 } 5749 5750 spin_unlock_irqrestore(vhost->host->host_lock, flags); 5751 } 5752 5753 /** 5754 * ibmvfc_work - Do task level work 5755 * @data: ibmvfc host struct 5756 * 5757 * Returns: 5758 * zero 5759 **/ 5760 static int ibmvfc_work(void *data) 5761 { 5762 struct ibmvfc_host *vhost = data; 5763 int rc; 5764 5765 set_user_nice(current, MIN_NICE); 5766 5767 while (1) { 5768 rc = wait_event_interruptible(vhost->work_wait_q, 5769 ibmvfc_work_to_do(vhost)); 5770 5771 BUG_ON(rc); 5772 5773 if (kthread_should_stop()) 5774 break; 5775 5776 ibmvfc_do_work(vhost); 5777 } 5778 5779 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 5780 return 0; 5781 } 5782 5783 /** 5784 * ibmvfc_alloc_queue - Allocate queue 5785 * @vhost: ibmvfc host struct 5786 * @queue: ibmvfc queue to allocate 5787 * @fmt: queue format to allocate 5788 * 5789 * Returns: 5790 * 0 on success / non-zero on failure 5791 **/ 5792 static int ibmvfc_alloc_queue(struct ibmvfc_host *vhost, 5793 struct ibmvfc_queue *queue, 5794 enum ibmvfc_msg_fmt fmt) 5795 { 5796 struct device *dev = vhost->dev; 5797 size_t fmt_size; 5798 5799 ENTER; 5800 spin_lock_init(&queue->_lock); 5801 queue->q_lock = &queue->_lock; 5802 5803 switch (fmt) { 5804 case IBMVFC_CRQ_FMT: 5805 fmt_size = sizeof(*queue->msgs.crq); 5806 queue->total_depth = scsi_qdepth + IBMVFC_NUM_INTERNAL_REQ; 5807 queue->evt_depth = scsi_qdepth; 5808 queue->reserved_depth = IBMVFC_NUM_INTERNAL_REQ; 5809 break; 5810 case IBMVFC_ASYNC_FMT: 5811 fmt_size = sizeof(*queue->msgs.async); 5812 break; 5813 case IBMVFC_SUB_CRQ_FMT: 5814 fmt_size = sizeof(*queue->msgs.scrq); 5815 /* We need one extra event for Cancel Commands */ 5816 queue->total_depth = scsi_qdepth + IBMVFC_NUM_INTERNAL_SUBQ_REQ; 5817 queue->evt_depth = scsi_qdepth; 5818 queue->reserved_depth = IBMVFC_NUM_INTERNAL_SUBQ_REQ; 5819 break; 5820 default: 5821 dev_warn(dev, "Unknown command/response queue message format: %d\n", fmt); 5822 return -EINVAL; 5823 } 5824 5825 queue->fmt = fmt; 5826 if (ibmvfc_init_event_pool(vhost, queue)) { 5827 dev_err(dev, "Couldn't initialize event pool.\n"); 5828 return -ENOMEM; 5829 } 5830 5831 queue->msgs.handle = (void *)get_zeroed_page(GFP_KERNEL); 5832 if (!queue->msgs.handle) 5833 return -ENOMEM; 5834 5835 queue->msg_token = dma_map_single(dev, queue->msgs.handle, PAGE_SIZE, 5836 DMA_BIDIRECTIONAL); 5837 5838 if (dma_mapping_error(dev, queue->msg_token)) { 5839 free_page((unsigned long)queue->msgs.handle); 5840 queue->msgs.handle = NULL; 5841 return -ENOMEM; 5842 } 5843 5844 queue->cur = 0; 5845 queue->size = PAGE_SIZE / fmt_size; 5846 5847 queue->vhost = vhost; 5848 return 0; 5849 } 5850 5851 /** 5852 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 5853 * @vhost: ibmvfc host struct 5854 * 5855 * Allocates a page for messages, maps it for dma, and registers 5856 * the crq with the hypervisor. 5857 * 5858 * Return value: 5859 * zero on success / other on failure 5860 **/ 5861 static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 5862 { 5863 int rc, retrc = -ENOMEM; 5864 struct device *dev = vhost->dev; 5865 struct vio_dev *vdev = to_vio_dev(dev); 5866 struct ibmvfc_queue *crq = &vhost->crq; 5867 5868 ENTER; 5869 if (ibmvfc_alloc_queue(vhost, crq, IBMVFC_CRQ_FMT)) 5870 return -ENOMEM; 5871 5872 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5873 crq->msg_token, PAGE_SIZE); 5874 5875 if (rc == H_RESOURCE) 5876 /* maybe kexecing and resource is busy. try a reset */ 5877 retrc = rc = ibmvfc_reset_crq(vhost); 5878 5879 if (rc == H_CLOSED) 5880 dev_warn(dev, "Partner adapter not ready\n"); 5881 else if (rc) { 5882 dev_warn(dev, "Error %d opening adapter\n", rc); 5883 goto reg_crq_failed; 5884 } 5885 5886 retrc = 0; 5887 5888 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 5889 5890 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 5891 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 5892 goto req_irq_failed; 5893 } 5894 5895 if ((rc = vio_enable_interrupts(vdev))) { 5896 dev_err(dev, "Error %d enabling interrupts\n", rc); 5897 goto req_irq_failed; 5898 } 5899 5900 LEAVE; 5901 return retrc; 5902 5903 req_irq_failed: 5904 tasklet_kill(&vhost->tasklet); 5905 do { 5906 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5907 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5908 reg_crq_failed: 5909 ibmvfc_free_queue(vhost, crq); 5910 return retrc; 5911 } 5912 5913 static int ibmvfc_register_channel(struct ibmvfc_host *vhost, 5914 struct ibmvfc_channels *channels, 5915 int index) 5916 { 5917 struct device *dev = vhost->dev; 5918 struct vio_dev *vdev = to_vio_dev(dev); 5919 struct ibmvfc_queue *scrq = &channels->scrqs[index]; 5920 int rc = -ENOMEM; 5921 5922 ENTER; 5923 5924 rc = h_reg_sub_crq(vdev->unit_address, scrq->msg_token, PAGE_SIZE, 5925 &scrq->cookie, &scrq->hw_irq); 5926 5927 /* H_CLOSED indicates successful register, but no CRQ partner */ 5928 if (rc && rc != H_CLOSED) { 5929 dev_warn(dev, "Error registering sub-crq: %d\n", rc); 5930 if (rc == H_PARAMETER) 5931 dev_warn_once(dev, "Firmware may not support MQ\n"); 5932 goto reg_failed; 5933 } 5934 5935 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 5936 5937 if (!scrq->irq) { 5938 rc = -EINVAL; 5939 dev_err(dev, "Error mapping sub-crq[%d] irq\n", index); 5940 goto irq_failed; 5941 } 5942 5943 switch (channels->protocol) { 5944 case IBMVFC_PROTO_SCSI: 5945 snprintf(scrq->name, sizeof(scrq->name), "ibmvfc-%x-scsi%d", 5946 vdev->unit_address, index); 5947 scrq->handler = ibmvfc_interrupt_mq; 5948 break; 5949 case IBMVFC_PROTO_NVME: 5950 snprintf(scrq->name, sizeof(scrq->name), "ibmvfc-%x-nvmf%d", 5951 vdev->unit_address, index); 5952 scrq->handler = ibmvfc_interrupt_mq; 5953 break; 5954 default: 5955 dev_err(dev, "Unknown channel protocol (%d)\n", 5956 channels->protocol); 5957 goto irq_failed; 5958 } 5959 5960 rc = request_irq(scrq->irq, scrq->handler, 0, scrq->name, scrq); 5961 5962 if (rc) { 5963 dev_err(dev, "Couldn't register sub-crq[%d] irq\n", index); 5964 irq_dispose_mapping(scrq->irq); 5965 goto irq_failed; 5966 } 5967 5968 scrq->hwq_id = index; 5969 5970 LEAVE; 5971 return 0; 5972 5973 irq_failed: 5974 do { 5975 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, scrq->cookie); 5976 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5977 reg_failed: 5978 LEAVE; 5979 return rc; 5980 } 5981 5982 static void ibmvfc_deregister_channel(struct ibmvfc_host *vhost, 5983 struct ibmvfc_channels *channels, 5984 int index) 5985 { 5986 struct device *dev = vhost->dev; 5987 struct vio_dev *vdev = to_vio_dev(dev); 5988 struct ibmvfc_queue *scrq = &channels->scrqs[index]; 5989 long rc; 5990 5991 ENTER; 5992 5993 free_irq(scrq->irq, scrq); 5994 irq_dispose_mapping(scrq->irq); 5995 scrq->irq = 0; 5996 5997 do { 5998 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, 5999 scrq->cookie); 6000 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6001 6002 if (rc) 6003 dev_err(dev, "Failed to free sub-crq[%d]: rc=%ld\n", index, rc); 6004 6005 /* Clean out the queue */ 6006 memset(scrq->msgs.crq, 0, PAGE_SIZE); 6007 scrq->cur = 0; 6008 6009 LEAVE; 6010 } 6011 6012 static void ibmvfc_reg_sub_crqs(struct ibmvfc_host *vhost, 6013 struct ibmvfc_channels *channels) 6014 { 6015 int i, j; 6016 6017 ENTER; 6018 if (!vhost->mq_enabled || !channels->scrqs) 6019 return; 6020 6021 for (i = 0; i < channels->max_queues; i++) { 6022 if (ibmvfc_register_channel(vhost, channels, i)) { 6023 for (j = i; j > 0; j--) 6024 ibmvfc_deregister_channel(vhost, channels, j - 1); 6025 vhost->do_enquiry = 0; 6026 return; 6027 } 6028 } 6029 6030 LEAVE; 6031 } 6032 6033 static void ibmvfc_dereg_sub_crqs(struct ibmvfc_host *vhost, 6034 struct ibmvfc_channels *channels) 6035 { 6036 int i; 6037 6038 ENTER; 6039 if (!vhost->mq_enabled || !channels->scrqs) 6040 return; 6041 6042 for (i = 0; i < channels->max_queues; i++) 6043 ibmvfc_deregister_channel(vhost, channels, i); 6044 6045 LEAVE; 6046 } 6047 6048 static int ibmvfc_alloc_channels(struct ibmvfc_host *vhost, 6049 struct ibmvfc_channels *channels) 6050 { 6051 struct ibmvfc_queue *scrq; 6052 int i, j; 6053 int rc = 0; 6054 6055 channels->scrqs = kcalloc(channels->max_queues, 6056 sizeof(*channels->scrqs), 6057 GFP_KERNEL); 6058 if (!channels->scrqs) 6059 return -ENOMEM; 6060 6061 for (i = 0; i < channels->max_queues; i++) { 6062 scrq = &channels->scrqs[i]; 6063 rc = ibmvfc_alloc_queue(vhost, scrq, IBMVFC_SUB_CRQ_FMT); 6064 if (rc) { 6065 for (j = i; j > 0; j--) { 6066 scrq = &channels->scrqs[j - 1]; 6067 ibmvfc_free_queue(vhost, scrq); 6068 } 6069 kfree(channels->scrqs); 6070 channels->scrqs = NULL; 6071 channels->active_queues = 0; 6072 return rc; 6073 } 6074 } 6075 6076 return rc; 6077 } 6078 6079 static void ibmvfc_init_sub_crqs(struct ibmvfc_host *vhost) 6080 { 6081 ENTER; 6082 if (!vhost->mq_enabled) 6083 return; 6084 6085 if (ibmvfc_alloc_channels(vhost, &vhost->scsi_scrqs)) { 6086 vhost->do_enquiry = 0; 6087 vhost->mq_enabled = 0; 6088 return; 6089 } 6090 6091 ibmvfc_reg_sub_crqs(vhost, &vhost->scsi_scrqs); 6092 6093 LEAVE; 6094 } 6095 6096 static void ibmvfc_release_channels(struct ibmvfc_host *vhost, 6097 struct ibmvfc_channels *channels) 6098 { 6099 struct ibmvfc_queue *scrq; 6100 int i; 6101 6102 if (channels->scrqs) { 6103 for (i = 0; i < channels->max_queues; i++) { 6104 scrq = &channels->scrqs[i]; 6105 ibmvfc_free_queue(vhost, scrq); 6106 } 6107 6108 kfree(channels->scrqs); 6109 channels->scrqs = NULL; 6110 channels->active_queues = 0; 6111 } 6112 } 6113 6114 static void ibmvfc_release_sub_crqs(struct ibmvfc_host *vhost) 6115 { 6116 ENTER; 6117 if (!vhost->scsi_scrqs.scrqs) 6118 return; 6119 6120 ibmvfc_dereg_sub_crqs(vhost, &vhost->scsi_scrqs); 6121 6122 ibmvfc_release_channels(vhost, &vhost->scsi_scrqs); 6123 LEAVE; 6124 } 6125 6126 static void ibmvfc_free_disc_buf(struct device *dev, struct ibmvfc_channels *channels) 6127 { 6128 dma_free_coherent(dev, channels->disc_buf_sz, channels->disc_buf, 6129 channels->disc_buf_dma); 6130 } 6131 6132 /** 6133 * ibmvfc_free_mem - Free memory for vhost 6134 * @vhost: ibmvfc host struct 6135 * 6136 * Return value: 6137 * none 6138 **/ 6139 static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 6140 { 6141 struct ibmvfc_queue *async_q = &vhost->async_crq; 6142 6143 ENTER; 6144 mempool_destroy(vhost->tgt_pool); 6145 kfree(vhost->trace); 6146 ibmvfc_free_disc_buf(vhost->dev, &vhost->scsi_scrqs); 6147 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 6148 vhost->login_buf, vhost->login_buf_dma); 6149 dma_free_coherent(vhost->dev, sizeof(*vhost->channel_setup_buf), 6150 vhost->channel_setup_buf, vhost->channel_setup_dma); 6151 dma_pool_destroy(vhost->sg_pool); 6152 ibmvfc_free_queue(vhost, async_q); 6153 LEAVE; 6154 } 6155 6156 static int ibmvfc_alloc_disc_buf(struct device *dev, struct ibmvfc_channels *channels) 6157 { 6158 channels->disc_buf_sz = sizeof(*channels->disc_buf) * max_targets; 6159 channels->disc_buf = dma_alloc_coherent(dev, channels->disc_buf_sz, 6160 &channels->disc_buf_dma, GFP_KERNEL); 6161 6162 if (!channels->disc_buf) { 6163 dev_err(dev, "Couldn't allocate %s Discover Targets buffer\n", 6164 (channels->protocol == IBMVFC_PROTO_SCSI) ? "SCSI" : "NVMe"); 6165 return -ENOMEM; 6166 } 6167 6168 return 0; 6169 } 6170 6171 /** 6172 * ibmvfc_alloc_mem - Allocate memory for vhost 6173 * @vhost: ibmvfc host struct 6174 * 6175 * Return value: 6176 * 0 on success / non-zero on failure 6177 **/ 6178 static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 6179 { 6180 struct ibmvfc_queue *async_q = &vhost->async_crq; 6181 struct device *dev = vhost->dev; 6182 6183 ENTER; 6184 if (ibmvfc_alloc_queue(vhost, async_q, IBMVFC_ASYNC_FMT)) { 6185 dev_err(dev, "Couldn't allocate/map async queue.\n"); 6186 goto nomem; 6187 } 6188 6189 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 6190 SG_ALL * sizeof(struct srp_direct_buf), 6191 sizeof(struct srp_direct_buf), 0); 6192 6193 if (!vhost->sg_pool) { 6194 dev_err(dev, "Failed to allocate sg pool\n"); 6195 goto unmap_async_crq; 6196 } 6197 6198 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 6199 &vhost->login_buf_dma, GFP_KERNEL); 6200 6201 if (!vhost->login_buf) { 6202 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 6203 goto free_sg_pool; 6204 } 6205 6206 if (ibmvfc_alloc_disc_buf(dev, &vhost->scsi_scrqs)) 6207 goto free_login_buffer; 6208 6209 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 6210 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 6211 atomic_set(&vhost->trace_index, -1); 6212 6213 if (!vhost->trace) 6214 goto free_scsi_disc_buffer; 6215 6216 vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 6217 sizeof(struct ibmvfc_target)); 6218 6219 if (!vhost->tgt_pool) { 6220 dev_err(dev, "Couldn't allocate target memory pool\n"); 6221 goto free_trace; 6222 } 6223 6224 vhost->channel_setup_buf = dma_alloc_coherent(dev, sizeof(*vhost->channel_setup_buf), 6225 &vhost->channel_setup_dma, 6226 GFP_KERNEL); 6227 6228 if (!vhost->channel_setup_buf) { 6229 dev_err(dev, "Couldn't allocate Channel Setup buffer\n"); 6230 goto free_tgt_pool; 6231 } 6232 6233 LEAVE; 6234 return 0; 6235 6236 free_tgt_pool: 6237 mempool_destroy(vhost->tgt_pool); 6238 free_trace: 6239 kfree(vhost->trace); 6240 free_scsi_disc_buffer: 6241 ibmvfc_free_disc_buf(dev, &vhost->scsi_scrqs); 6242 free_login_buffer: 6243 dma_free_coherent(dev, sizeof(*vhost->login_buf), 6244 vhost->login_buf, vhost->login_buf_dma); 6245 free_sg_pool: 6246 dma_pool_destroy(vhost->sg_pool); 6247 unmap_async_crq: 6248 ibmvfc_free_queue(vhost, async_q); 6249 nomem: 6250 LEAVE; 6251 return -ENOMEM; 6252 } 6253 6254 /** 6255 * ibmvfc_rport_add_thread - Worker thread for rport adds 6256 * @work: work struct 6257 * 6258 **/ 6259 static void ibmvfc_rport_add_thread(struct work_struct *work) 6260 { 6261 struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, 6262 rport_add_work_q); 6263 struct ibmvfc_target *tgt; 6264 struct fc_rport *rport; 6265 unsigned long flags; 6266 int did_work; 6267 6268 ENTER; 6269 spin_lock_irqsave(vhost->host->host_lock, flags); 6270 do { 6271 did_work = 0; 6272 if (vhost->state != IBMVFC_ACTIVE) 6273 break; 6274 6275 list_for_each_entry(tgt, &vhost->targets, queue) { 6276 if (tgt->add_rport) { 6277 did_work = 1; 6278 tgt->add_rport = 0; 6279 kref_get(&tgt->kref); 6280 rport = tgt->rport; 6281 if (!rport) { 6282 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6283 ibmvfc_tgt_add_rport(tgt); 6284 } else if (get_device(&rport->dev)) { 6285 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6286 tgt_dbg(tgt, "Setting rport roles\n"); 6287 fc_remote_port_rolechg(rport, tgt->ids.roles); 6288 put_device(&rport->dev); 6289 } else { 6290 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6291 } 6292 6293 kref_put(&tgt->kref, ibmvfc_release_tgt); 6294 spin_lock_irqsave(vhost->host->host_lock, flags); 6295 break; 6296 } 6297 } 6298 } while(did_work); 6299 6300 if (vhost->state == IBMVFC_ACTIVE) 6301 vhost->scan_complete = 1; 6302 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6303 LEAVE; 6304 } 6305 6306 /** 6307 * ibmvfc_probe - Adapter hot plug add entry point 6308 * @vdev: vio device struct 6309 * @id: vio device id struct 6310 * 6311 * Return value: 6312 * 0 on success / non-zero on failure 6313 **/ 6314 static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 6315 { 6316 struct ibmvfc_host *vhost; 6317 struct Scsi_Host *shost; 6318 struct device *dev = &vdev->dev; 6319 int rc = -ENOMEM; 6320 unsigned int online_cpus = num_online_cpus(); 6321 unsigned int max_scsi_queues = min((unsigned int)IBMVFC_MAX_SCSI_QUEUES, online_cpus); 6322 6323 ENTER; 6324 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 6325 if (!shost) { 6326 dev_err(dev, "Couldn't allocate host data\n"); 6327 goto out; 6328 } 6329 6330 shost->transportt = ibmvfc_transport_template; 6331 shost->can_queue = scsi_qdepth; 6332 shost->max_lun = max_lun; 6333 shost->max_id = max_targets; 6334 shost->max_sectors = IBMVFC_MAX_SECTORS; 6335 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 6336 shost->unique_id = shost->host_no; 6337 shost->nr_hw_queues = mq_enabled ? min(max_scsi_queues, nr_scsi_hw_queues) : 1; 6338 6339 vhost = shost_priv(shost); 6340 INIT_LIST_HEAD(&vhost->targets); 6341 INIT_LIST_HEAD(&vhost->purge); 6342 sprintf(vhost->name, IBMVFC_NAME); 6343 vhost->host = shost; 6344 vhost->dev = dev; 6345 vhost->partition_number = -1; 6346 vhost->log_level = log_level; 6347 vhost->task_set = 1; 6348 6349 vhost->mq_enabled = mq_enabled; 6350 vhost->scsi_scrqs.desired_queues = min(shost->nr_hw_queues, nr_scsi_channels); 6351 vhost->scsi_scrqs.max_queues = shost->nr_hw_queues; 6352 vhost->scsi_scrqs.protocol = IBMVFC_PROTO_SCSI; 6353 vhost->using_channels = 0; 6354 vhost->do_enquiry = 1; 6355 vhost->scan_timeout = 0; 6356 6357 strcpy(vhost->partition_name, "UNKNOWN"); 6358 init_waitqueue_head(&vhost->work_wait_q); 6359 init_waitqueue_head(&vhost->init_wait_q); 6360 INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); 6361 mutex_init(&vhost->passthru_mutex); 6362 6363 if ((rc = ibmvfc_alloc_mem(vhost))) 6364 goto free_scsi_host; 6365 6366 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 6367 shost->host_no); 6368 6369 if (IS_ERR(vhost->work_thread)) { 6370 dev_err(dev, "Couldn't create kernel thread: %ld\n", 6371 PTR_ERR(vhost->work_thread)); 6372 rc = PTR_ERR(vhost->work_thread); 6373 goto free_host_mem; 6374 } 6375 6376 if ((rc = ibmvfc_init_crq(vhost))) { 6377 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 6378 goto kill_kthread; 6379 } 6380 6381 if ((rc = scsi_add_host(shost, dev))) 6382 goto release_crq; 6383 6384 fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; 6385 6386 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 6387 &ibmvfc_trace_attr))) { 6388 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 6389 goto remove_shost; 6390 } 6391 6392 ibmvfc_init_sub_crqs(vhost); 6393 6394 if (shost_to_fc_host(shost)->rqst_q) 6395 blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); 6396 dev_set_drvdata(dev, vhost); 6397 spin_lock(&ibmvfc_driver_lock); 6398 list_add_tail(&vhost->queue, &ibmvfc_head); 6399 spin_unlock(&ibmvfc_driver_lock); 6400 6401 ibmvfc_send_crq_init(vhost); 6402 scsi_scan_host(shost); 6403 return 0; 6404 6405 remove_shost: 6406 scsi_remove_host(shost); 6407 release_crq: 6408 ibmvfc_release_crq_queue(vhost); 6409 kill_kthread: 6410 kthread_stop(vhost->work_thread); 6411 free_host_mem: 6412 ibmvfc_free_mem(vhost); 6413 free_scsi_host: 6414 scsi_host_put(shost); 6415 out: 6416 LEAVE; 6417 return rc; 6418 } 6419 6420 /** 6421 * ibmvfc_remove - Adapter hot plug remove entry point 6422 * @vdev: vio device struct 6423 * 6424 * Return value: 6425 * 0 6426 **/ 6427 static void ibmvfc_remove(struct vio_dev *vdev) 6428 { 6429 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 6430 LIST_HEAD(purge); 6431 unsigned long flags; 6432 6433 ENTER; 6434 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 6435 6436 spin_lock_irqsave(vhost->host->host_lock, flags); 6437 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 6438 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6439 6440 ibmvfc_wait_while_resetting(vhost); 6441 kthread_stop(vhost->work_thread); 6442 fc_remove_host(vhost->host); 6443 scsi_remove_host(vhost->host); 6444 6445 spin_lock_irqsave(vhost->host->host_lock, flags); 6446 ibmvfc_purge_requests(vhost, DID_ERROR); 6447 list_splice_init(&vhost->purge, &purge); 6448 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6449 ibmvfc_complete_purge(&purge); 6450 ibmvfc_release_sub_crqs(vhost); 6451 ibmvfc_release_crq_queue(vhost); 6452 6453 ibmvfc_free_mem(vhost); 6454 spin_lock(&ibmvfc_driver_lock); 6455 list_del(&vhost->queue); 6456 spin_unlock(&ibmvfc_driver_lock); 6457 scsi_host_put(vhost->host); 6458 LEAVE; 6459 } 6460 6461 /** 6462 * ibmvfc_resume - Resume from suspend 6463 * @dev: device struct 6464 * 6465 * We may have lost an interrupt across suspend/resume, so kick the 6466 * interrupt handler 6467 * 6468 */ 6469 static int ibmvfc_resume(struct device *dev) 6470 { 6471 unsigned long flags; 6472 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 6473 struct vio_dev *vdev = to_vio_dev(dev); 6474 6475 spin_lock_irqsave(vhost->host->host_lock, flags); 6476 vio_disable_interrupts(vdev); 6477 tasklet_schedule(&vhost->tasklet); 6478 spin_unlock_irqrestore(vhost->host->host_lock, flags); 6479 return 0; 6480 } 6481 6482 /** 6483 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 6484 * @vdev: vio device struct 6485 * 6486 * Return value: 6487 * Number of bytes the driver will need to DMA map at the same time in 6488 * order to perform well. 6489 */ 6490 static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 6491 { 6492 unsigned long pool_dma; 6493 6494 pool_dma = (IBMVFC_MAX_SCSI_QUEUES * scsi_qdepth) * sizeof(union ibmvfc_iu); 6495 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 6496 } 6497 6498 static const struct vio_device_id ibmvfc_device_table[] = { 6499 {"fcp", "IBM,vfc-client"}, 6500 { "", "" } 6501 }; 6502 MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 6503 6504 static const struct dev_pm_ops ibmvfc_pm_ops = { 6505 .resume = ibmvfc_resume 6506 }; 6507 6508 static struct vio_driver ibmvfc_driver = { 6509 .id_table = ibmvfc_device_table, 6510 .probe = ibmvfc_probe, 6511 .remove = ibmvfc_remove, 6512 .get_desired_dma = ibmvfc_get_desired_dma, 6513 .name = IBMVFC_NAME, 6514 .pm = &ibmvfc_pm_ops, 6515 }; 6516 6517 static struct fc_function_template ibmvfc_transport_functions = { 6518 .show_host_fabric_name = 1, 6519 .show_host_node_name = 1, 6520 .show_host_port_name = 1, 6521 .show_host_supported_classes = 1, 6522 .show_host_port_type = 1, 6523 .show_host_port_id = 1, 6524 .show_host_maxframe_size = 1, 6525 6526 .get_host_port_state = ibmvfc_get_host_port_state, 6527 .show_host_port_state = 1, 6528 6529 .get_host_speed = ibmvfc_get_host_speed, 6530 .show_host_speed = 1, 6531 6532 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 6533 .terminate_rport_io = ibmvfc_terminate_rport_io, 6534 6535 .show_rport_maxframe_size = 1, 6536 .show_rport_supported_classes = 1, 6537 6538 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 6539 .show_rport_dev_loss_tmo = 1, 6540 6541 .get_starget_node_name = ibmvfc_get_starget_node_name, 6542 .show_starget_node_name = 1, 6543 6544 .get_starget_port_name = ibmvfc_get_starget_port_name, 6545 .show_starget_port_name = 1, 6546 6547 .get_starget_port_id = ibmvfc_get_starget_port_id, 6548 .show_starget_port_id = 1, 6549 6550 .bsg_request = ibmvfc_bsg_request, 6551 .bsg_timeout = ibmvfc_bsg_timeout, 6552 }; 6553 6554 /** 6555 * ibmvfc_module_init - Initialize the ibmvfc module 6556 * 6557 * Return value: 6558 * 0 on success / other on failure 6559 **/ 6560 static int __init ibmvfc_module_init(void) 6561 { 6562 int rc; 6563 6564 if (!firmware_has_feature(FW_FEATURE_VIO)) 6565 return -ENODEV; 6566 6567 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 6568 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 6569 6570 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 6571 if (!ibmvfc_transport_template) 6572 return -ENOMEM; 6573 6574 rc = vio_register_driver(&ibmvfc_driver); 6575 if (rc) 6576 fc_release_transport(ibmvfc_transport_template); 6577 return rc; 6578 } 6579 6580 /** 6581 * ibmvfc_module_exit - Teardown the ibmvfc module 6582 * 6583 * Return value: 6584 * nothing 6585 **/ 6586 static void __exit ibmvfc_module_exit(void) 6587 { 6588 vio_unregister_driver(&ibmvfc_driver); 6589 fc_release_transport(ibmvfc_transport_template); 6590 } 6591 6592 module_init(ibmvfc_module_init); 6593 module_exit(ibmvfc_module_exit); 6594