1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 #pragma ident "%Z%%M% %I% %E% SMI" 26 27 /* 28 * Multiplexed I/O SCSI vHCI implementation 29 */ 30 31 #include <sys/conf.h> 32 #include <sys/file.h> 33 #include <sys/ddi.h> 34 #include <sys/sunddi.h> 35 #include <sys/scsi/scsi.h> 36 #include <sys/scsi/impl/scsi_reset_notify.h> 37 #include <sys/sunmdi.h> 38 #include <sys/mdi_impldefs.h> 39 #include <sys/scsi/adapters/scsi_vhci.h> 40 #include <sys/disp.h> 41 #include <sys/byteorder.h> 42 43 extern uintptr_t scsi_callback_id; 44 extern ddi_dma_attr_t scsi_alloc_attr; 45 46 #ifdef DEBUG 47 int vhci_debug = VHCI_DEBUG_DEFAULT_VAL; 48 #endif 49 50 /* retry for the vhci_do_prout command when a not ready is returned */ 51 int vhci_prout_not_ready_retry = 180; 52 53 /* 54 * These values are defined to support the internal retry of 55 * SCSI packets for better sense code handling. 56 */ 57 #define VHCI_CMD_CMPLT 0 58 #define VHCI_CMD_RETRY 1 59 #define VHCI_CMD_ERROR -1 60 61 #define PROPFLAGS (DDI_PROP_DONTPASS | DDI_PROP_NOTPROM) 62 #define VHCI_SCSI_PERR 0x47 63 #define VHCI_PGR_ILLEGALOP -2 64 #define VHCI_NUM_UPDATE_TASKQ 8 65 #define VHCI_STD_INQ_SIZE 128 66 67 /* 68 * Version Macros 69 */ 70 #define VHCI_NAME_VERSION "SCSI VHCI Driver %I%" 71 char vhci_version_name[] = VHCI_NAME_VERSION; 72 73 int vhci_first_time = 0; 74 clock_t vhci_to_ticks = 0; 75 int vhci_init_wait_timeout = VHCI_INIT_WAIT_TIMEOUT; 76 kcondvar_t vhci_cv; 77 kmutex_t vhci_global_mutex; 78 void *vhci_softstate = NULL; /* for soft state */ 79 80 /* 81 * Flag to delay the retry of the reserve command 82 */ 83 int vhci_reserve_delay = 100000; 84 static int vhci_path_quiesce_timeout = 60; 85 static uchar_t zero_key[MHIOC_RESV_KEY_SIZE]; 86 87 /* uscsi delay for a TRAN_BUSY */ 88 static int vhci_uscsi_delay = 100000; 89 static int vhci_uscsi_retry_count = 180; 90 /* uscsi_restart_sense timeout id in case it needs to get canceled */ 91 static timeout_id_t vhci_restart_timeid = 0; 92 93 /* 94 * Bidirectional map of 'target-port' to port id <pid> for support of 95 * iostat(1M) '-Xx' and '-Yx' output. 96 */ 97 static kmutex_t vhci_targetmap_mutex; 98 static uint_t vhci_targetmap_pid = 1; 99 static mod_hash_t *vhci_targetmap_bypid; /* <pid> -> 'target-port' */ 100 static mod_hash_t *vhci_targetmap_byport; /* 'target-port' -> <pid> */ 101 102 /* 103 * functions exported by scsi_vhci struct cb_ops 104 */ 105 static int vhci_open(dev_t *, int, int, cred_t *); 106 static int vhci_close(dev_t, int, int, cred_t *); 107 static int vhci_ioctl(dev_t, int, intptr_t, int, cred_t *, int *); 108 109 /* 110 * functions exported by scsi_vhci struct dev_ops 111 */ 112 static int vhci_getinfo(dev_info_t *, ddi_info_cmd_t, void *, void **); 113 static int vhci_attach(dev_info_t *, ddi_attach_cmd_t); 114 static int vhci_detach(dev_info_t *, ddi_detach_cmd_t); 115 116 /* 117 * functions exported by scsi_vhci scsi_hba_tran_t transport table 118 */ 119 static int vhci_scsi_tgt_init(dev_info_t *, dev_info_t *, 120 scsi_hba_tran_t *, struct scsi_device *); 121 static void vhci_scsi_tgt_free(dev_info_t *, dev_info_t *, scsi_hba_tran_t *, 122 struct scsi_device *); 123 static int vhci_pgr_register_start(scsi_vhci_lun_t *, struct scsi_pkt *); 124 static int vhci_scsi_start(struct scsi_address *, struct scsi_pkt *); 125 static int vhci_scsi_abort(struct scsi_address *, struct scsi_pkt *); 126 static int vhci_scsi_reset(struct scsi_address *, int); 127 static int vhci_scsi_reset_target(struct scsi_address *, int level, 128 uint8_t select_path); 129 static int vhci_scsi_reset_bus(struct scsi_address *); 130 static int vhci_scsi_getcap(struct scsi_address *, char *, int); 131 static int vhci_scsi_setcap(struct scsi_address *, char *, int, int); 132 static int vhci_commoncap(struct scsi_address *, char *, int, int, int); 133 static int vhci_pHCI_cap(struct scsi_address *ap, char *cap, int val, int whom, 134 mdi_pathinfo_t *pip); 135 static struct scsi_pkt *vhci_scsi_init_pkt(struct scsi_address *, 136 struct scsi_pkt *, struct buf *, int, int, int, int, int (*)(), caddr_t); 137 static void vhci_scsi_destroy_pkt(struct scsi_address *, struct scsi_pkt *); 138 static void vhci_scsi_dmafree(struct scsi_address *, struct scsi_pkt *); 139 static void vhci_scsi_sync_pkt(struct scsi_address *, struct scsi_pkt *); 140 static int vhci_scsi_reset_notify(struct scsi_address *, int, void (*)(caddr_t), 141 caddr_t); 142 static int vhci_scsi_get_bus_addr(struct scsi_device *, char *, int); 143 static int vhci_scsi_get_name(struct scsi_device *, char *, int); 144 static int vhci_scsi_bus_power(dev_info_t *, void *, pm_bus_power_op_t, 145 void *, void *); 146 static int vhci_scsi_bus_config(dev_info_t *, uint_t, ddi_bus_config_op_t, 147 void *, dev_info_t **); 148 149 /* 150 * functions registered with the mpxio framework via mdi_vhci_ops_t 151 */ 152 static int vhci_pathinfo_init(dev_info_t *, mdi_pathinfo_t *, int); 153 static int vhci_pathinfo_uninit(dev_info_t *, mdi_pathinfo_t *, int); 154 static int vhci_pathinfo_state_change(dev_info_t *, mdi_pathinfo_t *, 155 mdi_pathinfo_state_t, uint32_t, int); 156 static int vhci_pathinfo_online(dev_info_t *, mdi_pathinfo_t *, int); 157 static int vhci_pathinfo_offline(dev_info_t *, mdi_pathinfo_t *, int); 158 static int vhci_failover(dev_info_t *, dev_info_t *, int); 159 static void vhci_client_attached(dev_info_t *); 160 161 static int vhci_ctl(dev_t, int, intptr_t, int, cred_t *, int *); 162 static int vhci_devctl(dev_t, int, intptr_t, int, cred_t *, int *); 163 static int vhci_ioc_get_phci_path(sv_iocdata_t *, caddr_t, int, caddr_t); 164 static int vhci_ioc_get_client_path(sv_iocdata_t *, caddr_t, int, caddr_t); 165 static int vhci_ioc_get_paddr(sv_iocdata_t *, caddr_t, int, caddr_t); 166 static int vhci_ioc_send_client_path(caddr_t, sv_iocdata_t *, int, caddr_t); 167 static void vhci_ioc_devi_to_path(dev_info_t *, caddr_t); 168 static int vhci_get_phci_path_list(dev_info_t *, sv_path_info_t *, uint_t); 169 static int vhci_get_client_path_list(dev_info_t *, sv_path_info_t *, uint_t); 170 static int vhci_get_iocdata(const void *, sv_iocdata_t *, int, caddr_t); 171 static int vhci_get_iocswitchdata(const void *, sv_switch_to_cntlr_iocdata_t *, 172 int, caddr_t); 173 static int vhci_ioc_alloc_pathinfo(sv_path_info_t **, sv_path_info_t **, 174 uint_t, sv_iocdata_t *, int, caddr_t); 175 static void vhci_ioc_free_pathinfo(sv_path_info_t *, sv_path_info_t *, uint_t); 176 static int vhci_ioc_send_pathinfo(sv_path_info_t *, sv_path_info_t *, uint_t, 177 sv_iocdata_t *, int, caddr_t); 178 static int vhci_handle_ext_fo(struct scsi_pkt *, int); 179 static int vhci_efo_watch_cb(caddr_t, struct scsi_watch_result *); 180 static int vhci_quiesce_lun(struct scsi_vhci_lun *); 181 static int vhci_pgr_validate_and_register(scsi_vhci_priv_t *); 182 static void vhci_dispatch_scsi_start(void *); 183 static void vhci_efo_done(void *); 184 static void vhci_initiate_auto_failback(void *); 185 static void vhci_update_pHCI_pkt(struct vhci_pkt *, struct scsi_pkt *); 186 static int vhci_update_pathinfo(struct scsi_device *, mdi_pathinfo_t *, 187 struct scsi_failover_ops *, scsi_vhci_lun_t *, struct scsi_vhci *); 188 static void vhci_kstat_create_pathinfo(mdi_pathinfo_t *); 189 static int vhci_quiesce_paths(dev_info_t *, dev_info_t *, 190 scsi_vhci_lun_t *, char *, char *); 191 192 static char *vhci_devnm_to_guid(char *); 193 static int vhci_bind_transport(struct scsi_address *, struct vhci_pkt *, 194 int, int (*func)(caddr_t)); 195 static void vhci_intr(struct scsi_pkt *); 196 static int vhci_do_prout(scsi_vhci_priv_t *); 197 static void vhci_run_cmd(void *); 198 static int vhci_do_prin(struct vhci_pkt **); 199 static struct scsi_pkt *vhci_create_retry_pkt(struct vhci_pkt *); 200 static struct vhci_pkt *vhci_sync_retry_pkt(struct vhci_pkt *); 201 static struct scsi_vhci_lun *vhci_lun_lookup(dev_info_t *); 202 static struct scsi_vhci_lun *vhci_lun_lookup_alloc(dev_info_t *, char *, int *); 203 static void vhci_lun_free(dev_info_t *); 204 static int vhci_recovery_reset(scsi_vhci_lun_t *, struct scsi_address *, 205 uint8_t, uint8_t); 206 void vhci_update_pathstates(void *); 207 208 #ifdef DEBUG 209 static void vhci_print_prin_keys(vhci_prin_readkeys_t *, int); 210 #endif 211 static void vhci_print_prout_keys(scsi_vhci_lun_t *, char *); 212 static void vhci_uscsi_iodone(struct scsi_pkt *pkt); 213 214 /* 215 * MP-API related functions 216 */ 217 extern int vhci_mpapi_init(struct scsi_vhci *); 218 extern void vhci_mpapi_add_dev_prod(struct scsi_vhci *, char *); 219 extern int vhci_mpapi_ctl(dev_t, int, intptr_t, int, cred_t *, int *); 220 extern void vhci_update_mpapi_data(struct scsi_vhci *, 221 scsi_vhci_lun_t *, mdi_pathinfo_t *); 222 extern void* vhci_get_mpapi_item(struct scsi_vhci *, mpapi_list_header_t *, 223 uint8_t, void*); 224 extern void vhci_mpapi_set_path_state(dev_info_t *, mdi_pathinfo_t *, int); 225 extern int vhci_mpapi_update_tpg_acc_state_for_lu(struct scsi_vhci *, 226 scsi_vhci_lun_t *); 227 228 /* Special export to MP-API of tpgs non-'fops' entry point */ 229 int (*tpgs_set_target_groups)(struct scsi_address *, int, int); 230 231 #define VHCI_DMA_MAX_XFER_CAP 0xffffffffULL 232 233 #define VHCI_MAX_PGR_RETRIES 3 234 235 /* 236 * Macros for the device-type mpxio options 237 */ 238 #define LOAD_BALANCE_OPTIONS "load-balance-options" 239 #define LOGICAL_BLOCK_REGION_SIZE "region-size" 240 #define MPXIO_OPTIONS_LIST "device-type-mpxio-options-list" 241 #define DEVICE_TYPE_STR "device-type" 242 #define isdigit(ch) ((ch) >= '0' && (ch) <= '9') 243 244 static struct cb_ops vhci_cb_ops = { 245 vhci_open, /* open */ 246 vhci_close, /* close */ 247 nodev, /* strategy */ 248 nodev, /* print */ 249 nodev, /* dump */ 250 nodev, /* read */ 251 nodev, /* write */ 252 vhci_ioctl, /* ioctl */ 253 nodev, /* devmap */ 254 nodev, /* mmap */ 255 nodev, /* segmap */ 256 nochpoll, /* chpoll */ 257 ddi_prop_op, /* cb_prop_op */ 258 0, /* streamtab */ 259 D_NEW | D_MP, /* cb_flag */ 260 CB_REV, /* rev */ 261 nodev, /* aread */ 262 nodev /* awrite */ 263 }; 264 265 static struct dev_ops vhci_ops = { 266 DEVO_REV, 267 0, 268 vhci_getinfo, 269 nulldev, /* identify */ 270 nulldev, /* probe */ 271 vhci_attach, /* attach and detach are mandatory */ 272 vhci_detach, 273 nodev, /* reset */ 274 &vhci_cb_ops, /* cb_ops */ 275 NULL, /* bus_ops */ 276 NULL, /* power */ 277 }; 278 279 extern struct mod_ops mod_driverops; 280 281 static struct modldrv modldrv = { 282 &mod_driverops, 283 vhci_version_name, /* module name */ 284 &vhci_ops 285 }; 286 287 static struct modlinkage modlinkage = { 288 MODREV_1, 289 &modldrv, 290 NULL 291 }; 292 293 static mdi_vhci_ops_t vhci_opinfo = { 294 MDI_VHCI_OPS_REV, 295 vhci_pathinfo_init, /* Pathinfo node init callback */ 296 vhci_pathinfo_uninit, /* Pathinfo uninit callback */ 297 vhci_pathinfo_state_change, /* Pathinfo node state change */ 298 vhci_failover, /* failover callback */ 299 vhci_client_attached /* client attached callback */ 300 }; 301 302 /* 303 * The scsi_failover table defines an ordered set of 'fops' modules supported 304 * by scsi_vhci. Currently, initialize this table from the 'ddi-forceload' 305 * property specified in scsi_vhci.conf. 306 */ 307 struct scsi_failover { 308 ddi_modhandle_t sf_mod; 309 struct scsi_failover_ops *sf_sfo; 310 } *scsi_failover_table; 311 uint_t scsi_nfailover; 312 313 int 314 _init(void) 315 { 316 int rval; 317 318 /* 319 * Allocate soft state and prepare to do ddi_soft_state_zalloc() 320 * before registering with the transport first. 321 */ 322 if ((rval = ddi_soft_state_init(&vhci_softstate, 323 sizeof (struct scsi_vhci), 1)) != 0) { 324 VHCI_DEBUG(1, (CE_NOTE, NULL, 325 "!_init:soft state init failed\n")); 326 return (rval); 327 } 328 329 if ((rval = scsi_hba_init(&modlinkage)) != 0) { 330 VHCI_DEBUG(1, (CE_NOTE, NULL, 331 "!_init: scsi hba init failed\n")); 332 ddi_soft_state_fini(&vhci_softstate); 333 return (rval); 334 } 335 336 mutex_init(&vhci_global_mutex, NULL, MUTEX_DRIVER, NULL); 337 cv_init(&vhci_cv, NULL, CV_DRIVER, NULL); 338 339 mutex_init(&vhci_targetmap_mutex, NULL, MUTEX_DRIVER, NULL); 340 vhci_targetmap_byport = mod_hash_create_strhash( 341 "vhci_targetmap_byport", 256, mod_hash_null_valdtor); 342 vhci_targetmap_bypid = mod_hash_create_idhash( 343 "vhci_targetmap_bypid", 256, mod_hash_null_valdtor); 344 345 if ((rval = mod_install(&modlinkage)) != 0) { 346 VHCI_DEBUG(1, (CE_NOTE, NULL, "!_init: mod_install failed\n")); 347 if (vhci_targetmap_bypid) 348 mod_hash_destroy_idhash(vhci_targetmap_bypid); 349 if (vhci_targetmap_byport) 350 mod_hash_destroy_strhash(vhci_targetmap_byport); 351 mutex_destroy(&vhci_targetmap_mutex); 352 cv_destroy(&vhci_cv); 353 mutex_destroy(&vhci_global_mutex); 354 scsi_hba_fini(&modlinkage); 355 ddi_soft_state_fini(&vhci_softstate); 356 } 357 return (rval); 358 } 359 360 361 /* 362 * the system is done with us as a driver, so clean up 363 */ 364 int 365 _fini(void) 366 { 367 int rval; 368 369 /* 370 * don't start cleaning up until we know that the module remove 371 * has worked -- if this works, then we know that each instance 372 * has successfully been DDI_DETACHed 373 */ 374 if ((rval = mod_remove(&modlinkage)) != 0) { 375 VHCI_DEBUG(4, (CE_NOTE, NULL, "!_fini: mod_remove failed\n")); 376 return (rval); 377 } 378 379 if (vhci_targetmap_bypid) 380 mod_hash_destroy_idhash(vhci_targetmap_bypid); 381 if (vhci_targetmap_byport) 382 mod_hash_destroy_strhash(vhci_targetmap_byport); 383 mutex_destroy(&vhci_targetmap_mutex); 384 cv_destroy(&vhci_cv); 385 mutex_destroy(&vhci_global_mutex); 386 scsi_hba_fini(&modlinkage); 387 ddi_soft_state_fini(&vhci_softstate); 388 389 return (rval); 390 } 391 392 int 393 _info(struct modinfo *modinfop) 394 { 395 return (mod_info(&modlinkage, modinfop)); 396 } 397 398 /* 399 * Lookup scsi_failover by "short name" of failover module. 400 */ 401 struct scsi_failover_ops * 402 vhci_failover_ops_by_name(char *name) 403 { 404 struct scsi_failover *sf; 405 406 for (sf = scsi_failover_table; sf->sf_mod; sf++) { 407 if (sf->sf_sfo == NULL) 408 continue; 409 if (strcmp(sf->sf_sfo->sfo_name, name) == 0) 410 return (sf->sf_sfo); 411 } 412 return (NULL); 413 } 414 415 /* 416 * Load all scsi_failover_ops 'fops' modules. 417 */ 418 static void 419 vhci_failover_modopen(struct scsi_vhci *vhci) 420 { 421 char **module; 422 int i; 423 struct scsi_failover *sf; 424 char **dt; 425 int e; 426 427 if (scsi_failover_table) 428 return; 429 430 /* Get the list of modules from scsi_vhci.conf */ 431 if (ddi_prop_lookup_string_array(DDI_DEV_T_ANY, 432 vhci->vhci_dip, DDI_PROP_DONTPASS, "ddi-forceload", 433 &module, &scsi_nfailover) != DDI_PROP_SUCCESS) { 434 cmn_err(CE_WARN, "scsi_vhci: " 435 "scsi_vhci.conf is missing 'ddi-forceload'"); 436 return; 437 } 438 if (scsi_nfailover == 0) { 439 cmn_err(CE_WARN, "scsi_vhci: " 440 "scsi_vhci.conf has empty 'ddi-forceload'"); 441 ddi_prop_free(module); 442 return; 443 } 444 445 /* allocate failover table based on number of modules */ 446 scsi_failover_table = (struct scsi_failover *) 447 kmem_zalloc(sizeof (struct scsi_failover) * (scsi_nfailover + 1), 448 KM_SLEEP); 449 450 /* loop over modules specified in scsi_vhci.conf and open each module */ 451 for (i = 0, sf = scsi_failover_table; i < scsi_nfailover; i++) { 452 if (module[i] == NULL) 453 continue; 454 455 sf->sf_mod = ddi_modopen(module[i], KRTLD_MODE_FIRST, &e); 456 if (sf->sf_mod == NULL) { 457 /* 458 * A module returns EEXIST if other software is 459 * supporting the intended function: for example 460 * the scsi_vhci_f_sum_emc module returns EEXIST 461 * from _init if EMC powerpath software is installed. 462 */ 463 if (e != EEXIST) 464 cmn_err(CE_WARN, "scsi_vhci: unable to open " 465 "module '%s', error %d", module[i], e); 466 continue; 467 } 468 sf->sf_sfo = ddi_modsym(sf->sf_mod, 469 "scsi_vhci_failover_ops", &e); 470 if (sf->sf_sfo == NULL) { 471 cmn_err(CE_WARN, "scsi_vhci: " 472 "unable to import 'scsi_failover_ops' from '%s', " 473 "error %d", module[i], e); 474 (void) ddi_modclose(sf->sf_mod); 475 sf->sf_mod = NULL; 476 continue; 477 } 478 479 /* register vid/pid of devices supported with mpapi */ 480 for (dt = sf->sf_sfo->sfo_devices; *dt; dt++) 481 vhci_mpapi_add_dev_prod(vhci, *dt); 482 483 /* 484 * Special processing for SFO_NAME_TPGS module, which contains 485 * the `tpgs_set_target_groups` implementation needed by the 486 * MP-API code. 487 */ 488 if (strcmp(sf->sf_sfo->sfo_name, SFO_NAME_TPGS) == 0) { 489 tpgs_set_target_groups = 490 (int (*)(struct scsi_address *, int, int)) 491 ddi_modsym(sf->sf_mod, "std_set_target_groups", &e); 492 if (tpgs_set_target_groups == NULL) { 493 cmn_err(CE_WARN, "scsi_vhci: " 494 "unable to import 'std_set_target_groups' " 495 "from '%s', error %d", module[i], e); 496 } 497 } 498 499 sf++; 500 } 501 502 /* verify that at least the "well-known" modules were there */ 503 if (vhci_failover_ops_by_name(SFO_NAME_SYM) == NULL) 504 cmn_err(CE_WARN, "scsi_vhci: well-known module \"" 505 SFO_NAME_SYM "\" not defined in scsi_vhci.conf's " 506 "'ddi-forceload'"); 507 if (vhci_failover_ops_by_name(SFO_NAME_TPGS) == NULL) 508 cmn_err(CE_WARN, "scsi_vhci: well-known module \"" 509 SFO_NAME_TPGS "\" not defined in scsi_vhci.conf's " 510 "'ddi-forceload'"); 511 512 /* call sfo_init for modules that need it */ 513 for (sf = scsi_failover_table; sf->sf_mod; sf++) { 514 if (sf->sf_sfo && sf->sf_sfo->sfo_init) 515 (*sf->sf_sfo->sfo_init)(); 516 } 517 518 ddi_prop_free(module); 519 } 520 521 /* 522 * unload all loaded scsi_failover_ops modules 523 */ 524 static void 525 vhci_failover_modclose() 526 { 527 struct scsi_failover *sf; 528 529 for (sf = scsi_failover_table; sf->sf_mod; sf++) { 530 if ((sf->sf_mod == NULL) || (sf->sf_sfo == NULL)) 531 continue; 532 (void) ddi_modclose(sf->sf_mod); 533 sf->sf_mod = NULL; 534 sf->sf_sfo = NULL; 535 } 536 537 if (scsi_failover_table && scsi_nfailover) 538 kmem_free(scsi_failover_table, 539 sizeof (struct scsi_failover) * (scsi_nfailover + 1)); 540 scsi_failover_table = NULL; 541 scsi_nfailover = 0; 542 } 543 544 /* ARGSUSED */ 545 static int 546 vhci_open(dev_t *devp, int flag, int otype, cred_t *credp) 547 { 548 struct scsi_vhci *vhci; 549 550 if (otype != OTYP_CHR) { 551 return (EINVAL); 552 } 553 554 vhci = ddi_get_soft_state(vhci_softstate, MINOR2INST(getminor(*devp))); 555 if (vhci == NULL) { 556 VHCI_DEBUG(1, (CE_NOTE, NULL, "vhci_open: failed ENXIO\n")); 557 return (ENXIO); 558 } 559 560 mutex_enter(&vhci->vhci_mutex); 561 if ((flag & FEXCL) && (vhci->vhci_state & VHCI_STATE_OPEN)) { 562 mutex_exit(&vhci->vhci_mutex); 563 vhci_log(CE_NOTE, vhci->vhci_dip, 564 "!vhci%d: Already open\n", getminor(*devp)); 565 return (EBUSY); 566 } 567 568 vhci->vhci_state |= VHCI_STATE_OPEN; 569 mutex_exit(&vhci->vhci_mutex); 570 return (0); 571 } 572 573 574 /* ARGSUSED */ 575 static int 576 vhci_close(dev_t dev, int flag, int otype, cred_t *credp) 577 { 578 struct scsi_vhci *vhci; 579 580 if (otype != OTYP_CHR) { 581 return (EINVAL); 582 } 583 584 vhci = ddi_get_soft_state(vhci_softstate, MINOR2INST(getminor(dev))); 585 if (vhci == NULL) { 586 VHCI_DEBUG(1, (CE_NOTE, NULL, "vhci_close: failed ENXIO\n")); 587 return (ENXIO); 588 } 589 590 mutex_enter(&vhci->vhci_mutex); 591 vhci->vhci_state &= ~VHCI_STATE_OPEN; 592 mutex_exit(&vhci->vhci_mutex); 593 594 return (0); 595 } 596 597 /* ARGSUSED */ 598 static int 599 vhci_ioctl(dev_t dev, int cmd, intptr_t data, int mode, 600 cred_t *credp, int *rval) 601 { 602 if (IS_DEVCTL(cmd)) { 603 return (vhci_devctl(dev, cmd, data, mode, credp, rval)); 604 } else if (cmd == MP_CMD) { 605 return (vhci_mpapi_ctl(dev, cmd, data, mode, credp, rval)); 606 } else { 607 return (vhci_ctl(dev, cmd, data, mode, credp, rval)); 608 } 609 } 610 611 /* 612 * attach the module 613 */ 614 static int 615 vhci_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 616 { 617 int rval = DDI_FAILURE; 618 int scsi_hba_attached = 0; 619 int vhci_attached = 0; 620 int mutex_initted = 0; 621 int instance; 622 struct scsi_vhci *vhci; 623 scsi_hba_tran_t *tran; 624 char cache_name_buf[64]; 625 char *data; 626 627 VHCI_DEBUG(4, (CE_NOTE, NULL, "vhci_attach: cmd=0x%x\n", cmd)); 628 629 instance = ddi_get_instance(dip); 630 631 switch (cmd) { 632 case DDI_ATTACH: 633 break; 634 635 case DDI_RESUME: 636 case DDI_PM_RESUME: 637 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_attach: resume not yet" 638 "implemented\n")); 639 return (rval); 640 641 default: 642 VHCI_DEBUG(1, (CE_NOTE, NULL, 643 "!vhci_attach: unknown ddi command\n")); 644 return (rval); 645 } 646 647 /* 648 * Allocate vhci data structure. 649 */ 650 if (ddi_soft_state_zalloc(vhci_softstate, instance) != DDI_SUCCESS) { 651 VHCI_DEBUG(1, (CE_NOTE, dip, "!vhci_attach:" 652 "soft state alloc failed\n")); 653 return (DDI_FAILURE); 654 } 655 656 if ((vhci = ddi_get_soft_state(vhci_softstate, instance)) == NULL) { 657 VHCI_DEBUG(1, (CE_NOTE, dip, "!vhci_attach:" 658 "bad soft state\n")); 659 ddi_soft_state_free(vhci_softstate, instance); 660 return (DDI_FAILURE); 661 } 662 663 /* Allocate packet cache */ 664 (void) snprintf(cache_name_buf, sizeof (cache_name_buf), 665 "vhci%d_cache", instance); 666 667 mutex_init(&vhci->vhci_mutex, NULL, MUTEX_DRIVER, NULL); 668 mutex_initted++; 669 670 /* 671 * Allocate a transport structure 672 */ 673 tran = scsi_hba_tran_alloc(dip, SCSI_HBA_CANSLEEP); 674 ASSERT(tran != NULL); 675 676 vhci->vhci_tran = tran; 677 vhci->vhci_dip = dip; 678 vhci->vhci_instance = instance; 679 680 tran->tran_hba_private = vhci; 681 tran->tran_tgt_private = NULL; 682 tran->tran_tgt_init = vhci_scsi_tgt_init; 683 tran->tran_tgt_probe = NULL; 684 tran->tran_tgt_free = vhci_scsi_tgt_free; 685 686 tran->tran_start = vhci_scsi_start; 687 tran->tran_abort = vhci_scsi_abort; 688 tran->tran_reset = vhci_scsi_reset; 689 tran->tran_getcap = vhci_scsi_getcap; 690 tran->tran_setcap = vhci_scsi_setcap; 691 tran->tran_init_pkt = vhci_scsi_init_pkt; 692 tran->tran_destroy_pkt = vhci_scsi_destroy_pkt; 693 tran->tran_dmafree = vhci_scsi_dmafree; 694 tran->tran_sync_pkt = vhci_scsi_sync_pkt; 695 tran->tran_reset_notify = vhci_scsi_reset_notify; 696 697 tran->tran_get_bus_addr = vhci_scsi_get_bus_addr; 698 tran->tran_get_name = vhci_scsi_get_name; 699 tran->tran_bus_reset = NULL; 700 tran->tran_quiesce = NULL; 701 tran->tran_unquiesce = NULL; 702 703 /* 704 * register event notification routines with scsa 705 */ 706 tran->tran_get_eventcookie = NULL; 707 tran->tran_add_eventcall = NULL; 708 tran->tran_remove_eventcall = NULL; 709 tran->tran_post_event = NULL; 710 711 tran->tran_bus_power = vhci_scsi_bus_power; 712 713 tran->tran_bus_config = vhci_scsi_bus_config; 714 715 /* 716 * Attach this instance with the mpxio framework 717 */ 718 if (mdi_vhci_register(MDI_HCI_CLASS_SCSI, dip, &vhci_opinfo, 0) 719 != MDI_SUCCESS) { 720 VHCI_DEBUG(1, (CE_NOTE, dip, "!vhci_attach:" 721 "mdi_vhci_register failed\n")); 722 goto attach_fail; 723 } 724 vhci_attached++; 725 726 /* 727 * Attach this instance of the hba. 728 * 729 * Regarding dma attributes: Since scsi_vhci is a virtual scsi HBA 730 * driver, it has nothing to do with DMA. However, when calling 731 * scsi_hba_attach_setup() we need to pass something valid in the 732 * dma attributes parameter. So we just use scsi_alloc_attr. 733 * SCSA itself seems to care only for dma_attr_minxfer and 734 * dma_attr_burstsizes fields of dma attributes structure. 735 * It expects those fileds to be non-zero. 736 */ 737 if (scsi_hba_attach_setup(dip, &scsi_alloc_attr, tran, 738 SCSI_HBA_TRAN_CLONE) != DDI_SUCCESS) { 739 VHCI_DEBUG(1, (CE_NOTE, dip, "!vhci_attach:" 740 "hba attach failed\n")); 741 goto attach_fail; 742 } 743 scsi_hba_attached++; 744 745 if (ddi_create_minor_node(dip, "devctl", S_IFCHR, 746 INST2DEVCTL(instance), DDI_NT_SCSI_NEXUS, 0) != DDI_SUCCESS) { 747 VHCI_DEBUG(1, (CE_NOTE, dip, "!vhci_attach:" 748 " ddi_create_minor_node failed\n")); 749 goto attach_fail; 750 } 751 752 /* 753 * Set pm-want-child-notification property for 754 * power management of the phci and client 755 */ 756 if (ddi_prop_create(DDI_DEV_T_NONE, dip, DDI_PROP_CANSLEEP, 757 "pm-want-child-notification?", NULL, NULL) != DDI_PROP_SUCCESS) { 758 cmn_err(CE_WARN, 759 "%s%d fail to create pm-want-child-notification? prop", 760 ddi_driver_name(dip), ddi_get_instance(dip)); 761 goto attach_fail; 762 } 763 764 vhci->vhci_taskq = taskq_create("vhci_taskq", 1, MINCLSYSPRI, 1, 4, 0); 765 vhci->vhci_update_pathstates_taskq = 766 taskq_create("vhci_update_pathstates", VHCI_NUM_UPDATE_TASKQ, 767 MINCLSYSPRI, 1, 4, 0); 768 ASSERT(vhci->vhci_taskq); 769 ASSERT(vhci->vhci_update_pathstates_taskq); 770 771 /* 772 * Set appropriate configuration flags based on options set in 773 * conf file. 774 */ 775 vhci->vhci_conf_flags = 0; 776 if (ddi_prop_lookup_string(DDI_DEV_T_ANY, dip, PROPFLAGS, 777 "auto-failback", &data) == DDI_SUCCESS) { 778 if (strcmp(data, "enable") == 0) 779 vhci->vhci_conf_flags |= VHCI_CONF_FLAGS_AUTO_FAILBACK; 780 ddi_prop_free(data); 781 } 782 783 if (!(vhci->vhci_conf_flags & VHCI_CONF_FLAGS_AUTO_FAILBACK)) 784 vhci_log(CE_NOTE, dip, "!Auto-failback capability " 785 "disabled through scsi_vhci.conf file."); 786 787 /* 788 * Allocate an mpapi private structure 789 */ 790 vhci->mp_priv = kmem_zalloc(sizeof (mpapi_priv_t), KM_SLEEP); 791 if (vhci_mpapi_init(vhci) != 0) { 792 VHCI_DEBUG(1, (CE_WARN, NULL, "!vhci_attach: " 793 "vhci_mpapi_init() failed")); 794 } 795 796 vhci_failover_modopen(vhci); /* load failover modules */ 797 798 ddi_report_dev(dip); 799 return (DDI_SUCCESS); 800 801 attach_fail: 802 if (vhci_attached) 803 (void) mdi_vhci_unregister(dip, 0); 804 805 if (scsi_hba_attached) 806 (void) scsi_hba_detach(dip); 807 808 if (vhci->vhci_tran) 809 scsi_hba_tran_free(vhci->vhci_tran); 810 811 if (mutex_initted) { 812 mutex_destroy(&vhci->vhci_mutex); 813 } 814 815 ddi_soft_state_free(vhci_softstate, instance); 816 return (DDI_FAILURE); 817 } 818 819 820 /*ARGSUSED*/ 821 static int 822 vhci_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 823 { 824 int instance = ddi_get_instance(dip); 825 scsi_hba_tran_t *tran; 826 struct scsi_vhci *vhci; 827 828 VHCI_DEBUG(4, (CE_NOTE, NULL, "vhci_detach: cmd=0x%x\n", cmd)); 829 830 if ((tran = ddi_get_driver_private(dip)) == NULL) 831 return (DDI_FAILURE); 832 833 vhci = TRAN2HBAPRIVATE(tran); 834 if (!vhci) { 835 return (DDI_FAILURE); 836 } 837 838 switch (cmd) { 839 case DDI_DETACH: 840 break; 841 842 case DDI_SUSPEND: 843 case DDI_PM_SUSPEND: 844 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_detach: suspend/pm not yet" 845 "implemented\n")); 846 return (DDI_FAILURE); 847 848 default: 849 VHCI_DEBUG(1, (CE_NOTE, NULL, 850 "!vhci_detach: unknown ddi command\n")); 851 return (DDI_FAILURE); 852 } 853 854 (void) mdi_vhci_unregister(dip, 0); 855 (void) scsi_hba_detach(dip); 856 scsi_hba_tran_free(tran); 857 858 if (ddi_prop_remove(DDI_DEV_T_NONE, dip, 859 "pm-want-child-notification?") != DDI_PROP_SUCCESS) { 860 cmn_err(CE_WARN, 861 "%s%d unable to remove prop pm-want_child_notification?", 862 ddi_driver_name(dip), ddi_get_instance(dip)); 863 } 864 if (vhci_restart_timeid != 0) { 865 (void) untimeout(vhci_restart_timeid); 866 } 867 vhci_restart_timeid = 0; 868 869 mutex_destroy(&vhci->vhci_mutex); 870 vhci->vhci_dip = NULL; 871 vhci->vhci_tran = NULL; 872 taskq_destroy(vhci->vhci_taskq); 873 taskq_destroy(vhci->vhci_update_pathstates_taskq); 874 ddi_remove_minor_node(dip, NULL); 875 ddi_soft_state_free(vhci_softstate, instance); 876 877 vhci_failover_modclose(); /* unload failover modules */ 878 return (DDI_SUCCESS); 879 } 880 881 /* 882 * vhci_getinfo() 883 * Given the device number, return the devinfo pointer or the 884 * instance number. 885 * Note: always succeed DDI_INFO_DEVT2INSTANCE, even before attach. 886 */ 887 888 /*ARGSUSED*/ 889 static int 890 vhci_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **result) 891 { 892 struct scsi_vhci *vhcip; 893 int instance = MINOR2INST(getminor((dev_t)arg)); 894 895 switch (cmd) { 896 case DDI_INFO_DEVT2DEVINFO: 897 vhcip = ddi_get_soft_state(vhci_softstate, instance); 898 if (vhcip != NULL) 899 *result = vhcip->vhci_dip; 900 else { 901 *result = NULL; 902 return (DDI_FAILURE); 903 } 904 break; 905 906 case DDI_INFO_DEVT2INSTANCE: 907 *result = (void *)(uintptr_t)instance; 908 break; 909 910 default: 911 return (DDI_FAILURE); 912 } 913 914 return (DDI_SUCCESS); 915 } 916 917 918 /*ARGSUSED*/ 919 static int 920 vhci_scsi_tgt_init(dev_info_t *hba_dip, dev_info_t *tgt_dip, 921 scsi_hba_tran_t *hba_tran, struct scsi_device *sd) 922 { 923 char *guid; 924 scsi_vhci_lun_t *vlun; 925 struct scsi_vhci *vhci; 926 clock_t from_ticks; 927 mdi_pathinfo_t *pip; 928 int rval; 929 930 ASSERT(hba_dip != NULL); 931 ASSERT(tgt_dip != NULL); 932 933 vhci = ddi_get_soft_state(vhci_softstate, ddi_get_instance(hba_dip)); 934 ASSERT(vhci != NULL); 935 936 VHCI_DEBUG(4, (CE_NOTE, hba_dip, 937 "!tgt_init: called for %s (instance %d)\n", 938 ddi_driver_name(tgt_dip), ddi_get_instance(tgt_dip))); 939 940 if (ddi_prop_lookup_string(DDI_DEV_T_ANY, tgt_dip, PROPFLAGS, 941 MDI_CLIENT_GUID_PROP, &guid) != DDI_SUCCESS) { 942 /* 943 * This must be the .conf node. The ssd node under 944 * fp already inserts a delay, so we just return from here. 945 * We rely on this delay to have all dips be posted to 946 * the ndi hotplug thread's newdev list. This is 947 * necessary for the deferred attach mechanism to work 948 * and opens() done soon after boot to succeed. 949 */ 950 VHCI_DEBUG(4, (CE_WARN, hba_dip, "tgt_init: lun guid " 951 "property failed")); 952 return (DDI_NOT_WELL_FORMED); 953 } 954 955 vlun = vhci_lun_lookup(tgt_dip); 956 957 mutex_enter(&vhci_global_mutex); 958 959 from_ticks = ddi_get_lbolt(); 960 if (vhci_to_ticks == 0) { 961 vhci_to_ticks = from_ticks + 962 drv_usectohz(vhci_init_wait_timeout); 963 } 964 965 #if DEBUG 966 if (vlun) { 967 VHCI_DEBUG(1, (CE_WARN, hba_dip, "tgt_init: " 968 "vhci_scsi_tgt_init: guid %s : found vlun 0x%p " 969 "from_ticks %lx to_ticks %lx", 970 guid, (void *)vlun, from_ticks, vhci_to_ticks)); 971 } else { 972 VHCI_DEBUG(1, (CE_WARN, hba_dip, "tgt_init: " 973 "vhci_scsi_tgt_init: guid %s : vlun not found " 974 "from_ticks %lx to_ticks %lx", guid, from_ticks, 975 vhci_to_ticks)); 976 } 977 #endif 978 979 rval = mdi_select_path(tgt_dip, NULL, 980 (MDI_SELECT_ONLINE_PATH | MDI_SELECT_STANDBY_PATH), NULL, &pip); 981 if (rval == MDI_SUCCESS) { 982 mdi_rele_path(pip); 983 } 984 985 /* 986 * Wait for the following conditions : 987 * 1. no vlun available yet 988 * 2. no path established 989 * 3. timer did not expire 990 */ 991 while ((vlun == NULL) || (mdi_client_get_path_count(tgt_dip) == 0) || 992 (rval != MDI_SUCCESS)) { 993 if (vlun && vlun->svl_not_supported) { 994 VHCI_DEBUG(1, (CE_WARN, hba_dip, "tgt_init: " 995 "vlun 0x%p lun guid %s not supported!", 996 (void *)vlun, guid)); 997 mutex_exit(&vhci_global_mutex); 998 ddi_prop_free(guid); 999 return (DDI_NOT_WELL_FORMED); 1000 } 1001 if ((vhci_first_time == 0) && (from_ticks >= vhci_to_ticks)) { 1002 vhci_first_time = 1; 1003 } 1004 if (vhci_first_time == 1) { 1005 VHCI_DEBUG(1, (CE_WARN, hba_dip, "vhci_scsi_tgt_init: " 1006 "no wait for %s. from_tick %lx, to_tick %lx", 1007 guid, from_ticks, vhci_to_ticks)); 1008 mutex_exit(&vhci_global_mutex); 1009 ddi_prop_free(guid); 1010 return (DDI_NOT_WELL_FORMED); 1011 } 1012 1013 if (cv_timedwait(&vhci_cv, 1014 &vhci_global_mutex, vhci_to_ticks) == -1) { 1015 /* Timed out */ 1016 #ifdef DEBUG 1017 if (vlun == NULL) { 1018 VHCI_DEBUG(1, (CE_WARN, hba_dip, 1019 "tgt_init: no vlun for %s!", guid)); 1020 } else if (mdi_client_get_path_count(tgt_dip) == 0) { 1021 VHCI_DEBUG(1, (CE_WARN, hba_dip, 1022 "tgt_init: client path count is " 1023 "zero for %s!", guid)); 1024 } else { 1025 VHCI_DEBUG(1, (CE_WARN, hba_dip, 1026 "tgt_init: client path not " 1027 "available yet for %s!", guid)); 1028 } 1029 #endif /* DEBUG */ 1030 mutex_exit(&vhci_global_mutex); 1031 ddi_prop_free(guid); 1032 return (DDI_NOT_WELL_FORMED); 1033 } 1034 vlun = vhci_lun_lookup(tgt_dip); 1035 rval = mdi_select_path(tgt_dip, NULL, 1036 (MDI_SELECT_ONLINE_PATH | MDI_SELECT_STANDBY_PATH), 1037 NULL, &pip); 1038 if (rval == MDI_SUCCESS) { 1039 mdi_rele_path(pip); 1040 } 1041 from_ticks = ddi_get_lbolt(); 1042 } 1043 mutex_exit(&vhci_global_mutex); 1044 1045 ASSERT(vlun != NULL); 1046 ddi_prop_free(guid); 1047 hba_tran->tran_tgt_private = vlun; 1048 1049 return (DDI_SUCCESS); 1050 } 1051 1052 /*ARGSUSED*/ 1053 static void 1054 vhci_scsi_tgt_free(dev_info_t *hba_dip, dev_info_t *tgt_dip, 1055 scsi_hba_tran_t *hba_tran, struct scsi_device *sd) 1056 { 1057 } 1058 1059 /* 1060 * a PGR register command has started; copy the info we need 1061 */ 1062 int 1063 vhci_pgr_register_start(scsi_vhci_lun_t *vlun, struct scsi_pkt *pkt) 1064 { 1065 struct vhci_pkt *vpkt = TGTPKT2VHCIPKT(pkt); 1066 void *addr; 1067 1068 if (!vpkt->vpkt_tgt_init_bp) 1069 return (TRAN_BADPKT); 1070 1071 addr = bp_mapin_common(vpkt->vpkt_tgt_init_bp, 1072 (vpkt->vpkt_flags & CFLAG_NOWAIT) ? VM_NOSLEEP : VM_SLEEP); 1073 if (addr == NULL) 1074 return (TRAN_BUSY); 1075 1076 mutex_enter(&vlun->svl_mutex); 1077 1078 vhci_print_prout_keys(vlun, "v_pgr_reg_start: before bcopy:"); 1079 1080 bcopy(addr, &vlun->svl_prout, sizeof (vhci_prout_t) - 1081 (2 * MHIOC_RESV_KEY_SIZE*sizeof (char))); 1082 bcopy(pkt->pkt_cdbp, vlun->svl_cdb, sizeof (vlun->svl_cdb)); 1083 1084 vhci_print_prout_keys(vlun, "v_pgr_reg_start: after bcopy:"); 1085 1086 vlun->svl_time = pkt->pkt_time; 1087 vlun->svl_bcount = vpkt->vpkt_tgt_init_bp->b_bcount; 1088 vlun->svl_first_path = vpkt->vpkt_path; 1089 mutex_exit(&vlun->svl_mutex); 1090 return (0); 1091 } 1092 1093 /* 1094 * Function name : vhci_scsi_start() 1095 * 1096 * Return Values : TRAN_FATAL_ERROR - vhci has been shutdown 1097 * or other fatal failure 1098 * preventing packet transportation 1099 * TRAN_BUSY - request queue is full 1100 * TRAN_ACCEPT - pkt has been submitted to phci 1101 * (or is held in the waitQ) 1102 * Description : Implements SCSA's tran_start() entry point for 1103 * packet transport 1104 * 1105 */ 1106 static int 1107 vhci_scsi_start(struct scsi_address *ap, struct scsi_pkt *pkt) 1108 { 1109 int rval = TRAN_ACCEPT; 1110 int instance, held; 1111 struct scsi_vhci *vhci = ADDR2VHCI(ap); 1112 struct scsi_vhci_lun *vlun = ADDR2VLUN(ap); 1113 struct vhci_pkt *vpkt = TGTPKT2VHCIPKT(pkt); 1114 int flags = 0; 1115 scsi_vhci_priv_t *svp; 1116 dev_info_t *cdip; 1117 client_lb_t lbp; 1118 int restore_lbp = 0; 1119 /* set if pkt is SCSI-II RESERVE cmd */ 1120 int pkt_reserve_cmd = 0; 1121 int reserve_failed = 0; 1122 1123 ASSERT(vhci != NULL); 1124 ASSERT(vpkt != NULL); 1125 ASSERT(vpkt->vpkt_state != VHCI_PKT_ISSUED); 1126 cdip = ADDR2DIP(ap); 1127 1128 /* 1129 * Block IOs if LUN is held or QUIESCED for IOs. 1130 */ 1131 if ((VHCI_LUN_IS_HELD(vlun)) || 1132 ((vlun->svl_flags & VLUN_QUIESCED_FLG) == VLUN_QUIESCED_FLG)) { 1133 return (TRAN_BUSY); 1134 } 1135 1136 /* 1137 * vhci_lun needs to be quiesced before SCSI-II RESERVE command 1138 * can be issued. This may require a cv_timedwait, which is 1139 * dangerous to perform in an interrupt context. So if this 1140 * is a RESERVE command a taskq is dispatched to service it. 1141 * This taskq shall again call vhci_scsi_start, but we shall be 1142 * sure its not in an interrupt context. 1143 */ 1144 if ((pkt->pkt_cdbp[0] == SCMD_RESERVE) || 1145 (pkt->pkt_cdbp[0] == SCMD_RESERVE_G1)) { 1146 if (!(vpkt->vpkt_state & VHCI_PKT_THRU_TASKQ)) { 1147 if (taskq_dispatch(vhci->vhci_taskq, 1148 vhci_dispatch_scsi_start, (void *) vpkt, 1149 KM_NOSLEEP)) { 1150 return (TRAN_ACCEPT); 1151 } else { 1152 return (TRAN_BUSY); 1153 } 1154 } 1155 1156 /* 1157 * Here we ensure that simultaneous SCSI-II RESERVE cmds don't 1158 * get serviced for a lun. 1159 */ 1160 VHCI_HOLD_LUN(vlun, VH_NOSLEEP, held); 1161 if (!held) { 1162 return (TRAN_BUSY); 1163 } else if ((vlun->svl_flags & VLUN_QUIESCED_FLG) == 1164 VLUN_QUIESCED_FLG) { 1165 VHCI_RELEASE_LUN(vlun); 1166 return (TRAN_BUSY); 1167 } 1168 1169 /* 1170 * To ensure that no IOs occur for this LUN for the duration 1171 * of this pkt set the VLUN_QUIESCED_FLG. 1172 * In case this routine needs to exit on error make sure that 1173 * this flag is cleared. 1174 */ 1175 vlun->svl_flags |= VLUN_QUIESCED_FLG; 1176 pkt_reserve_cmd = 1; 1177 1178 /* 1179 * if this is a SCSI-II RESERVE command, set load balancing 1180 * policy to be ALTERNATE PATH to ensure that all subsequent 1181 * IOs are routed on the same path. This is because if commands 1182 * are routed across multiple paths then IOs on paths other than 1183 * the one on which the RESERVE was executed will get a 1184 * RESERVATION CONFLICT 1185 */ 1186 lbp = mdi_get_lb_policy(cdip); 1187 if (lbp != LOAD_BALANCE_NONE) { 1188 if (vhci_quiesce_lun(vlun) != 1) { 1189 vlun->svl_flags &= ~VLUN_QUIESCED_FLG; 1190 VHCI_RELEASE_LUN(vlun); 1191 return (TRAN_FATAL_ERROR); 1192 } 1193 vlun->svl_lb_policy_save = lbp; 1194 if (mdi_set_lb_policy(cdip, LOAD_BALANCE_NONE) != 1195 MDI_SUCCESS) { 1196 vlun->svl_flags &= ~VLUN_QUIESCED_FLG; 1197 VHCI_RELEASE_LUN(vlun); 1198 return (TRAN_FATAL_ERROR); 1199 } 1200 restore_lbp = 1; 1201 } 1202 /* 1203 * See comments for VLUN_RESERVE_ACTIVE_FLG in scsi_vhci.h 1204 * To narrow this window where a reserve command may be sent 1205 * down an inactive path the path states first need to be 1206 * updated. Before calling vhci_update_pathstates reset 1207 * VLUN_RESERVE_ACTIVE_FLG, just in case it was already set 1208 * for this lun. This shall prevent an unnecessary reset 1209 * from being sent out. 1210 */ 1211 vlun->svl_flags &= ~VLUN_RESERVE_ACTIVE_FLG; 1212 vhci_update_pathstates((void *)vlun); 1213 } 1214 1215 instance = ddi_get_instance(vhci->vhci_dip); 1216 1217 /* 1218 * If the command is PRIN with action of zero, then the cmd 1219 * is reading PR keys which requires filtering on completion. 1220 * Data cache sync must be guaranteed. 1221 */ 1222 if ((pkt->pkt_cdbp[0] == SCMD_PRIN) && 1223 (pkt->pkt_cdbp[1] == 0) && 1224 (vpkt->vpkt_org_vpkt == NULL)) { 1225 vpkt->vpkt_tgt_init_pkt_flags |= PKT_CONSISTENT; 1226 } 1227 1228 /* 1229 * Do not defer bind for PKT_DMA_PARTIAL 1230 */ 1231 if ((vpkt->vpkt_flags & CFLAG_DMA_PARTIAL) == 0) { 1232 1233 /* This is a non pkt_dma_partial case */ 1234 if ((rval = vhci_bind_transport( 1235 ap, vpkt, vpkt->vpkt_tgt_init_pkt_flags, NULL_FUNC)) 1236 != TRAN_ACCEPT) { 1237 VHCI_DEBUG(6, (CE_WARN, vhci->vhci_dip, 1238 "!vhci%d %x: failed to bind transport: " 1239 "vlun 0x%p pkt_reserved %x restore_lbp %x," 1240 "lbp %x", instance, rval, (void *)vlun, 1241 pkt_reserve_cmd, restore_lbp, lbp)); 1242 if (restore_lbp) 1243 (void) mdi_set_lb_policy(cdip, lbp); 1244 if (pkt_reserve_cmd) 1245 vlun->svl_flags &= ~VLUN_QUIESCED_FLG; 1246 return (rval); 1247 } 1248 VHCI_DEBUG(8, (CE_NOTE, NULL, 1249 "vhci_scsi_start: v_b_t called 0x%p\n", (void *)vpkt)); 1250 } 1251 ASSERT(vpkt->vpkt_hba_pkt != NULL); 1252 ASSERT(vpkt->vpkt_path != NULL); 1253 1254 /* 1255 * This is the chance to adjust the pHCI's pkt and other information 1256 * from target driver's pkt. 1257 */ 1258 VHCI_DEBUG(8, (CE_NOTE, vhci->vhci_dip, "vhci_scsi_start vpkt %p\n", 1259 (void *)vpkt)); 1260 vhci_update_pHCI_pkt(vpkt, pkt); 1261 1262 if (vlun->svl_flags & VLUN_RESERVE_ACTIVE_FLG) { 1263 if (vpkt->vpkt_path != vlun->svl_resrv_pip) { 1264 VHCI_DEBUG(1, (CE_WARN, vhci->vhci_dip, 1265 "!vhci_bind: reserve flag set for vlun 0x%p, but, " 1266 "pktpath 0x%p resrv path 0x%p differ. lb_policy %x", 1267 (void *)vlun, (void *)vpkt->vpkt_path, 1268 (void *)vlun->svl_resrv_pip, 1269 mdi_get_lb_policy(cdip))); 1270 reserve_failed = 1; 1271 } 1272 } 1273 1274 svp = (scsi_vhci_priv_t *)mdi_pi_get_vhci_private( 1275 vpkt->vpkt_path); 1276 if (svp == NULL || reserve_failed) { 1277 if (pkt_reserve_cmd) { 1278 VHCI_DEBUG(6, (CE_WARN, vhci->vhci_dip, 1279 "!vhci_bind returned null svp vlun 0x%p", 1280 (void *)vlun)); 1281 vlun->svl_flags &= ~VLUN_QUIESCED_FLG; 1282 if (restore_lbp) 1283 (void) mdi_set_lb_policy(cdip, lbp); 1284 } 1285 pkt_cleanup: 1286 if ((vpkt->vpkt_flags & CFLAG_DMA_PARTIAL) == 0) { 1287 scsi_destroy_pkt(vpkt->vpkt_hba_pkt); 1288 vpkt->vpkt_hba_pkt = NULL; 1289 if (vpkt->vpkt_path) { 1290 mdi_rele_path(vpkt->vpkt_path); 1291 vpkt->vpkt_path = NULL; 1292 } 1293 } 1294 if ((pkt->pkt_cdbp[0] == SCMD_PROUT) && 1295 (((pkt->pkt_cdbp[1] & 0x1f) == VHCI_PROUT_REGISTER) || 1296 ((pkt->pkt_cdbp[1] & 0x1f) == 1297 VHCI_PROUT_R_AND_IGNORE))) { 1298 sema_v(&vlun->svl_pgr_sema); 1299 } 1300 return (TRAN_BUSY); 1301 } 1302 1303 VHCI_INCR_PATH_CMDCOUNT(svp); 1304 1305 /* 1306 * Ensure that no other IOs raced ahead, while a RESERVE cmd was 1307 * QUIESCING the same lun. 1308 */ 1309 if ((!pkt_reserve_cmd) && 1310 ((vlun->svl_flags & VLUN_QUIESCED_FLG) == VLUN_QUIESCED_FLG)) { 1311 VHCI_DECR_PATH_CMDCOUNT(svp); 1312 goto pkt_cleanup; 1313 } 1314 1315 if ((pkt->pkt_cdbp[0] == SCMD_PRIN) || 1316 (pkt->pkt_cdbp[0] == SCMD_PROUT)) { 1317 /* 1318 * currently this thread only handles running PGR 1319 * commands, so don't bother creating it unless 1320 * something interesting is going to happen (like 1321 * either a PGR out, or a PGR in with enough space 1322 * to hold the keys that are getting returned) 1323 */ 1324 mutex_enter(&vlun->svl_mutex); 1325 if (((vlun->svl_flags & VLUN_TASK_D_ALIVE_FLG) == 0) && 1326 (pkt->pkt_cdbp[0] == SCMD_PROUT)) { 1327 vlun->svl_taskq = taskq_create("vlun_pgr_task_daemon", 1328 1, MINCLSYSPRI, 1, 4, 0); 1329 vlun->svl_flags |= VLUN_TASK_D_ALIVE_FLG; 1330 } 1331 mutex_exit(&vlun->svl_mutex); 1332 if ((pkt->pkt_cdbp[0] == SCMD_PROUT) && 1333 (((pkt->pkt_cdbp[1] & 0x1f) == VHCI_PROUT_REGISTER) || 1334 ((pkt->pkt_cdbp[1] & 0x1f) == 1335 VHCI_PROUT_R_AND_IGNORE))) { 1336 if (rval = vhci_pgr_register_start(vlun, pkt)) { 1337 /* an error */ 1338 sema_v(&vlun->svl_pgr_sema); 1339 return (rval); 1340 } 1341 } 1342 } 1343 1344 /* 1345 * SCSI-II RESERVE cmd is not expected in polled mode. 1346 * If this changes it needs to be handled for the polled scenario. 1347 */ 1348 flags = vpkt->vpkt_hba_pkt->pkt_flags; 1349 rval = scsi_transport(vpkt->vpkt_hba_pkt); 1350 if (rval == TRAN_ACCEPT) { 1351 if (flags & FLAG_NOINTR) { 1352 struct scsi_pkt *tpkt = vpkt->vpkt_tgt_pkt; 1353 struct scsi_pkt *pkt = vpkt->vpkt_hba_pkt; 1354 1355 ASSERT(tpkt != NULL); 1356 *(tpkt->pkt_scbp) = *(pkt->pkt_scbp); 1357 tpkt->pkt_resid = pkt->pkt_resid; 1358 tpkt->pkt_state = pkt->pkt_state; 1359 tpkt->pkt_statistics = pkt->pkt_statistics; 1360 tpkt->pkt_reason = pkt->pkt_reason; 1361 1362 if ((*(pkt->pkt_scbp) == STATUS_CHECK) && 1363 (pkt->pkt_state & STATE_ARQ_DONE)) { 1364 bcopy(pkt->pkt_scbp, tpkt->pkt_scbp, 1365 vpkt->vpkt_tgt_init_scblen); 1366 } 1367 1368 VHCI_DECR_PATH_CMDCOUNT(svp); 1369 if ((vpkt->vpkt_flags & CFLAG_DMA_PARTIAL) == 0) { 1370 scsi_destroy_pkt(vpkt->vpkt_hba_pkt); 1371 vpkt->vpkt_hba_pkt = NULL; 1372 if (vpkt->vpkt_path) { 1373 mdi_rele_path(vpkt->vpkt_path); 1374 vpkt->vpkt_path = NULL; 1375 } 1376 } 1377 /* 1378 * This path will not automatically retry pkts 1379 * internally, therefore, vpkt_org_vpkt should 1380 * never be set. 1381 */ 1382 ASSERT(vpkt->vpkt_org_vpkt == NULL); 1383 if (tpkt->pkt_comp) { 1384 (*tpkt->pkt_comp)(tpkt); 1385 } 1386 } 1387 return (rval); 1388 } else if ((pkt->pkt_cdbp[0] == SCMD_PROUT) && 1389 (((pkt->pkt_cdbp[1] & 0x1f) == VHCI_PROUT_REGISTER) || 1390 ((pkt->pkt_cdbp[1] & 0x1f) == VHCI_PROUT_R_AND_IGNORE))) { 1391 /* the command exited with bad status */ 1392 sema_v(&vlun->svl_pgr_sema); 1393 } else if (vpkt->vpkt_tgt_pkt->pkt_cdbp[0] == SCMD_PRIN) { 1394 /* the command exited with bad status */ 1395 sema_v(&vlun->svl_pgr_sema); 1396 } else if (pkt_reserve_cmd) { 1397 VHCI_DEBUG(6, (CE_WARN, vhci->vhci_dip, 1398 "!vhci_scsi_start: reserve failed vlun 0x%p", 1399 (void *)vlun)); 1400 vlun->svl_flags &= ~VLUN_QUIESCED_FLG; 1401 if (restore_lbp) 1402 (void) mdi_set_lb_policy(cdip, lbp); 1403 } 1404 1405 ASSERT(vpkt->vpkt_hba_pkt != NULL); 1406 VHCI_DECR_PATH_CMDCOUNT(svp); 1407 1408 /* Do not destroy phci packet information for PKT_DMA_PARTIAL */ 1409 if ((vpkt->vpkt_flags & CFLAG_DMA_PARTIAL) == 0) { 1410 scsi_destroy_pkt(vpkt->vpkt_hba_pkt); 1411 vpkt->vpkt_hba_pkt = NULL; 1412 if (vpkt->vpkt_path) { 1413 MDI_PI_ERRSTAT(vpkt->vpkt_path, MDI_PI_TRANSERR); 1414 mdi_rele_path(vpkt->vpkt_path); 1415 vpkt->vpkt_path = NULL; 1416 } 1417 } 1418 return (TRAN_BUSY); 1419 } 1420 1421 /* 1422 * Function name : vhci_scsi_reset() 1423 * 1424 * Return Values : 0 - reset failed 1425 * 1 - reset succeeded 1426 */ 1427 1428 /* ARGSUSED */ 1429 static int 1430 vhci_scsi_reset(struct scsi_address *ap, int level) 1431 { 1432 int rval = 0; 1433 1434 cmn_err(CE_WARN, "!vhci_scsi_reset 0x%x", level); 1435 if ((level == RESET_TARGET) || (level == RESET_LUN)) { 1436 return (vhci_scsi_reset_target(ap, level, TRUE)); 1437 } else if (level == RESET_ALL) { 1438 return (vhci_scsi_reset_bus(ap)); 1439 } 1440 1441 return (rval); 1442 } 1443 1444 /* 1445 * vhci_recovery_reset: 1446 * Issues reset to the device 1447 * Input: 1448 * vlun - vhci lun pointer of the device 1449 * ap - address of the device 1450 * select_path: 1451 * If select_path is FALSE, then the address specified in ap is 1452 * the path on which reset will be issued. 1453 * If select_path is TRUE, then path is obtained by calling 1454 * mdi_select_path. 1455 * 1456 * recovery_depth: 1457 * Caller can specify the level of reset. 1458 * VHCI_DEPTH_LUN - 1459 * Issues LUN RESET if device supports lun reset. 1460 * VHCI_DEPTH_TARGET - 1461 * If Lun Reset fails or the device does not support 1462 * Lun Reset, issues TARGET RESET 1463 * VHCI_DEPTH_ALL - 1464 * If Lun Reset fails or the device does not support 1465 * Lun Reset, issues TARGET RESET. 1466 * If TARGET RESET does not succeed, issues Bus Reset. 1467 */ 1468 1469 static int 1470 vhci_recovery_reset(scsi_vhci_lun_t *vlun, struct scsi_address *ap, 1471 uint8_t select_path, uint8_t recovery_depth) 1472 { 1473 int ret = 0; 1474 1475 ASSERT(ap != NULL); 1476 1477 if (vlun && vlun->svl_support_lun_reset == 1) { 1478 ret = vhci_scsi_reset_target(ap, RESET_LUN, 1479 select_path); 1480 } 1481 1482 recovery_depth--; 1483 1484 if ((ret == 0) && recovery_depth) { 1485 ret = vhci_scsi_reset_target(ap, RESET_TARGET, 1486 select_path); 1487 recovery_depth--; 1488 } 1489 1490 if ((ret == 0) && recovery_depth) { 1491 (void) scsi_reset(ap, RESET_ALL); 1492 } 1493 1494 return (ret); 1495 } 1496 1497 /* 1498 * Note: The scsi_address passed to this routine could be the scsi_address 1499 * for the virtual device or the physical device. No assumptions should be 1500 * made in this routine about the ap structure and a_hba_tran->tran_tgt_private 1501 * field of ap can not be assumed to be the vhci structure. 1502 * Further note that the child dip would be the dip of the ssd node irrespective 1503 * of the scsi_address passed. 1504 */ 1505 1506 static int 1507 vhci_scsi_reset_target(struct scsi_address *ap, int level, uint8_t select_path) 1508 { 1509 dev_info_t *vdip, *pdip, *cdip = ADDR2DIP(ap); 1510 mdi_pathinfo_t *pip = NULL; 1511 mdi_pathinfo_t *npip = NULL; 1512 int rval = -1; 1513 scsi_vhci_priv_t *svp = NULL; 1514 struct scsi_address *pap = NULL; 1515 scsi_hba_tran_t *hba = NULL; 1516 int sps; 1517 struct scsi_vhci *vhci = NULL; 1518 1519 if (select_path != TRUE) { 1520 ASSERT(ap != NULL); 1521 if (level == RESET_LUN) { 1522 hba = ap->a_hba_tran; 1523 ASSERT(hba != NULL); 1524 return ((*hba->tran_reset)(ap, RESET_LUN)); 1525 } 1526 return (scsi_reset(ap, level)); 1527 } 1528 1529 ASSERT(cdip != NULL); 1530 vdip = ddi_get_parent(cdip); 1531 ASSERT(vdip != NULL); 1532 vhci = ddi_get_soft_state(vhci_softstate, ddi_get_instance(vdip)); 1533 ASSERT(vhci != NULL); 1534 1535 rval = mdi_select_path(cdip, NULL, MDI_SELECT_ONLINE_PATH, NULL, &pip); 1536 if ((rval != MDI_SUCCESS) || (pip == NULL)) { 1537 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_scsi_reset_target: " 1538 "Unable to get a path, dip 0x%p", (void *)cdip)); 1539 return (0); 1540 } 1541 again: 1542 svp = (scsi_vhci_priv_t *)mdi_pi_get_vhci_private(pip); 1543 if (svp == NULL) { 1544 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_scsi_reset_target: " 1545 "priv is NULL, pip 0x%p", (void *)pip)); 1546 mdi_rele_path(pip); 1547 return (0); 1548 } 1549 1550 if (svp->svp_psd == NULL) { 1551 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_scsi_reset_target: " 1552 "psd is NULL, pip 0x%p, svp 0x%p", 1553 (void *)pip, (void *)svp)); 1554 mdi_rele_path(pip); 1555 return (0); 1556 } 1557 1558 pap = &svp->svp_psd->sd_address; 1559 hba = pap->a_hba_tran; 1560 1561 ASSERT(pap != NULL); 1562 ASSERT(hba != NULL); 1563 1564 if (hba->tran_reset != NULL) { 1565 if ((*hba->tran_reset)(pap, level) == 0) { 1566 pdip = mdi_pi_get_phci(pip); 1567 vhci_log(CE_WARN, vdip, "!(%s%d):" 1568 " path (%s%d), reset %d failed", 1569 ddi_driver_name(cdip), ddi_get_instance(cdip), 1570 ddi_driver_name(pdip), ddi_get_instance(pdip), 1571 level); 1572 1573 /* 1574 * Select next path and issue the reset, repeat 1575 * until all paths are exhausted 1576 */ 1577 sps = mdi_select_path(cdip, NULL, 1578 MDI_SELECT_ONLINE_PATH, pip, &npip); 1579 if ((sps != MDI_SUCCESS) || (npip == NULL)) { 1580 mdi_rele_path(pip); 1581 return (0); 1582 } 1583 mdi_rele_path(pip); 1584 pip = npip; 1585 goto again; 1586 } 1587 mdi_rele_path(pip); 1588 mutex_enter(&vhci->vhci_mutex); 1589 scsi_hba_reset_notify_callback(&vhci->vhci_mutex, 1590 &vhci->vhci_reset_notify_listf); 1591 mutex_exit(&vhci->vhci_mutex); 1592 VHCI_DEBUG(6, (CE_NOTE, NULL, "!vhci_scsi_reset_target: " 1593 "reset %d sent down pip:%p for cdip:%p\n", level, 1594 (void *)pip, (void *)cdip)); 1595 return (1); 1596 } 1597 mdi_rele_path(pip); 1598 return (0); 1599 } 1600 1601 1602 /* ARGSUSED */ 1603 static int 1604 vhci_scsi_reset_bus(struct scsi_address *ap) 1605 { 1606 return (1); 1607 } 1608 1609 1610 /* 1611 * called by vhci_getcap and vhci_setcap to get and set (respectively) 1612 * SCSI capabilities 1613 */ 1614 /* ARGSUSED */ 1615 static int 1616 vhci_commoncap(struct scsi_address *ap, char *cap, 1617 int val, int tgtonly, int doset) 1618 { 1619 struct scsi_vhci *vhci = ADDR2VHCI(ap); 1620 struct scsi_vhci_lun *vlun = ADDR2VLUN(ap); 1621 int cidx; 1622 int rval = 0; 1623 1624 if (cap == (char *)0) { 1625 VHCI_DEBUG(3, (CE_WARN, vhci->vhci_dip, 1626 "!vhci_commoncap: invalid arg")); 1627 return (rval); 1628 } 1629 1630 if (vlun == NULL) { 1631 VHCI_DEBUG(3, (CE_WARN, vhci->vhci_dip, 1632 "!vhci_commoncap: vlun is null")); 1633 return (rval); 1634 } 1635 1636 if ((cidx = scsi_hba_lookup_capstr(cap)) == -1) { 1637 return (UNDEFINED); 1638 } 1639 1640 /* 1641 * Process setcap request. 1642 */ 1643 if (doset) { 1644 /* 1645 * At present, we can only set binary (0/1) values 1646 */ 1647 switch (cidx) { 1648 case SCSI_CAP_ARQ: 1649 if (val == 0) { 1650 rval = 0; 1651 } else { 1652 rval = 1; 1653 } 1654 break; 1655 1656 case SCSI_CAP_LUN_RESET: 1657 if (tgtonly == 0) { 1658 VHCI_DEBUG(1, (CE_WARN, vhci->vhci_dip, 1659 "scsi_vhci_setcap: " 1660 "Returning error since whom = 0")); 1661 rval = -1; 1662 break; 1663 } 1664 /* 1665 * Set the capability accordingly. 1666 */ 1667 mutex_enter(&vlun->svl_mutex); 1668 vlun->svl_support_lun_reset = val; 1669 rval = val; 1670 mutex_exit(&vlun->svl_mutex); 1671 break; 1672 1673 case SCSI_CAP_SECTOR_SIZE: 1674 mutex_enter(&vlun->svl_mutex); 1675 vlun->svl_sector_size = val; 1676 vlun->svl_setcap_done = 1; 1677 mutex_exit(&vlun->svl_mutex); 1678 (void) vhci_pHCI_cap(ap, cap, val, tgtonly, NULL); 1679 1680 /* Always return success */ 1681 rval = 1; 1682 break; 1683 1684 default: 1685 VHCI_DEBUG(6, (CE_WARN, vhci->vhci_dip, 1686 "!vhci_setcap: unsupported %d", cidx)); 1687 rval = UNDEFINED; 1688 break; 1689 } 1690 1691 VHCI_DEBUG(6, (CE_NOTE, vhci->vhci_dip, 1692 "!set cap: cap=%s, val/tgtonly/doset/rval = " 1693 "0x%x/0x%x/0x%x/%d\n", 1694 cap, val, tgtonly, doset, rval)); 1695 1696 } else { 1697 /* 1698 * Process getcap request. 1699 */ 1700 switch (cidx) { 1701 case SCSI_CAP_DMA_MAX: 1702 rval = (int)VHCI_DMA_MAX_XFER_CAP; 1703 break; 1704 1705 case SCSI_CAP_INITIATOR_ID: 1706 rval = 0x00; 1707 break; 1708 1709 case SCSI_CAP_ARQ: 1710 case SCSI_CAP_RESET_NOTIFICATION: 1711 case SCSI_CAP_TAGGED_QING: 1712 rval = 1; 1713 break; 1714 1715 case SCSI_CAP_SCSI_VERSION: 1716 rval = 3; 1717 break; 1718 1719 case SCSI_CAP_INTERCONNECT_TYPE: 1720 rval = INTERCONNECT_FABRIC; 1721 break; 1722 1723 case SCSI_CAP_LUN_RESET: 1724 /* 1725 * scsi_vhci will always return success for LUN reset. 1726 * When request for doing LUN reset comes 1727 * through scsi_reset entry point, at that time attempt 1728 * will be made to do reset through all the possible 1729 * paths. 1730 */ 1731 mutex_enter(&vlun->svl_mutex); 1732 rval = vlun->svl_support_lun_reset; 1733 mutex_exit(&vlun->svl_mutex); 1734 VHCI_DEBUG(4, (CE_WARN, vhci->vhci_dip, 1735 "scsi_vhci_getcap:" 1736 "Getting the Lun reset capability %d", rval)); 1737 break; 1738 1739 case SCSI_CAP_SECTOR_SIZE: 1740 mutex_enter(&vlun->svl_mutex); 1741 rval = vlun->svl_sector_size; 1742 mutex_exit(&vlun->svl_mutex); 1743 break; 1744 1745 default: 1746 VHCI_DEBUG(6, (CE_WARN, vhci->vhci_dip, 1747 "!vhci_getcap: unsupported %d", cidx)); 1748 rval = UNDEFINED; 1749 break; 1750 } 1751 1752 VHCI_DEBUG(6, (CE_NOTE, vhci->vhci_dip, 1753 "!get cap: cap=%s, val/tgtonly/doset/rval = " 1754 "0x%x/0x%x/0x%x/%d\n", 1755 cap, val, tgtonly, doset, rval)); 1756 } 1757 return (rval); 1758 } 1759 1760 1761 /* 1762 * Function name : vhci_scsi_getcap() 1763 * 1764 */ 1765 static int 1766 vhci_scsi_getcap(struct scsi_address *ap, char *cap, int whom) 1767 { 1768 return (vhci_commoncap(ap, cap, 0, whom, 0)); 1769 } 1770 1771 static int 1772 vhci_scsi_setcap(struct scsi_address *ap, char *cap, int value, int whom) 1773 { 1774 return (vhci_commoncap(ap, cap, value, whom, 1)); 1775 } 1776 1777 /* 1778 * Function name : vhci_scsi_abort() 1779 */ 1780 /* ARGSUSED */ 1781 static int 1782 vhci_scsi_abort(struct scsi_address *ap, struct scsi_pkt *pkt) 1783 { 1784 return (0); 1785 } 1786 1787 /* 1788 * Function name : vhci_scsi_init_pkt 1789 * 1790 * Return Values : pointer to scsi_pkt, or NULL 1791 */ 1792 /* ARGSUSED */ 1793 static struct scsi_pkt * 1794 vhci_scsi_init_pkt(struct scsi_address *ap, struct scsi_pkt *pkt, 1795 struct buf *bp, int cmdlen, int statuslen, int tgtlen, 1796 int flags, int (*callback)(caddr_t), caddr_t arg) 1797 { 1798 struct scsi_vhci *vhci = ADDR2VHCI(ap); 1799 struct vhci_pkt *vpkt; 1800 int rval; 1801 int newpkt = 0; 1802 struct scsi_pkt *pktp; 1803 1804 1805 if (pkt == NULL) { 1806 if (cmdlen > VHCI_SCSI_CDB_SIZE) { 1807 VHCI_DEBUG(1, (CE_NOTE, NULL, 1808 "!init pkt: cdb size not supported\n")); 1809 return (NULL); 1810 } 1811 1812 pktp = scsi_hba_pkt_alloc(vhci->vhci_dip, 1813 ap, cmdlen, statuslen, tgtlen, sizeof (*vpkt), callback, 1814 arg); 1815 1816 if (pktp == NULL) { 1817 return (NULL); 1818 } 1819 1820 /* Get the vhci's private structure */ 1821 vpkt = (struct vhci_pkt *)(pktp->pkt_ha_private); 1822 ASSERT(vpkt); 1823 1824 /* Save the target driver's packet */ 1825 vpkt->vpkt_tgt_pkt = pktp; 1826 1827 /* 1828 * Save pkt_tgt_init_pkt fields if deferred binding 1829 * is needed or for other purposes. 1830 */ 1831 vpkt->vpkt_tgt_init_pkt_flags = flags; 1832 vpkt->vpkt_flags = (callback == NULL_FUNC) ? CFLAG_NOWAIT : 0; 1833 vpkt->vpkt_state = VHCI_PKT_IDLE; 1834 vpkt->vpkt_tgt_init_cdblen = cmdlen; 1835 vpkt->vpkt_tgt_init_scblen = statuslen; 1836 vpkt->vpkt_tgt_init_privlen = tgtlen; 1837 newpkt = 1; 1838 } else { /* pkt not NULL */ 1839 vpkt = pkt->pkt_ha_private; 1840 } 1841 1842 VHCI_DEBUG(8, (CE_NOTE, NULL, "vhci_scsi_init_pkt " 1843 "vpkt %p flags %x\n", (void *)vpkt, flags)); 1844 1845 /* Clear any stale error flags */ 1846 if (bp) { 1847 bioerror(bp, 0); 1848 } 1849 1850 vpkt->vpkt_tgt_init_bp = bp; 1851 1852 if (flags & PKT_DMA_PARTIAL) { 1853 1854 /* 1855 * Immediate binding is needed. 1856 * Target driver may not set this flag in next invocation. 1857 * vhci has to remember this flag was set during first 1858 * invocation of vhci_scsi_init_pkt. 1859 */ 1860 vpkt->vpkt_flags |= CFLAG_DMA_PARTIAL; 1861 } 1862 1863 if (vpkt->vpkt_flags & CFLAG_DMA_PARTIAL) { 1864 1865 /* 1866 * Re-initialize some of the target driver packet state 1867 * information. 1868 */ 1869 vpkt->vpkt_tgt_pkt->pkt_state = 0; 1870 vpkt->vpkt_tgt_pkt->pkt_statistics = 0; 1871 vpkt->vpkt_tgt_pkt->pkt_reason = 0; 1872 1873 /* 1874 * Binding a vpkt->vpkt_path for this IO at init_time. 1875 * If an IO error happens later, target driver will clear 1876 * this vpkt->vpkt_path binding before re-init IO again. 1877 */ 1878 VHCI_DEBUG(8, (CE_NOTE, NULL, 1879 "vhci_scsi_init_pkt: calling v_b_t %p, newpkt %d\n", 1880 (void *)vpkt, newpkt)); 1881 if (pkt && vpkt->vpkt_hba_pkt) { 1882 VHCI_DEBUG(4, (CE_NOTE, NULL, 1883 "v_s_i_p calling update_pHCI_pkt resid %ld\n", 1884 pkt->pkt_resid)); 1885 vhci_update_pHCI_pkt(vpkt, pkt); 1886 } 1887 if (callback == SLEEP_FUNC) { 1888 rval = vhci_bind_transport( 1889 ap, vpkt, flags, callback); 1890 } else { 1891 rval = vhci_bind_transport( 1892 ap, vpkt, flags, NULL_FUNC); 1893 } 1894 VHCI_DEBUG(8, (CE_NOTE, NULL, 1895 "vhci_scsi_init_pkt: v_b_t called 0x%p rval 0x%x\n", 1896 (void *)vpkt, rval)); 1897 if (bp) { 1898 if (rval == TRAN_FATAL_ERROR) { 1899 /* 1900 * No paths available. Could not bind 1901 * any pHCI. Setting EFAULT as a way 1902 * to indicate no DMA is mapped. 1903 */ 1904 bioerror(bp, EFAULT); 1905 } else { 1906 /* 1907 * Do not indicate any pHCI errors to 1908 * target driver otherwise. 1909 */ 1910 bioerror(bp, 0); 1911 } 1912 } 1913 if (rval != TRAN_ACCEPT) { 1914 VHCI_DEBUG(8, (CE_NOTE, NULL, 1915 "vhci_scsi_init_pkt: " 1916 "v_b_t failed 0x%p newpkt %x\n", 1917 (void *)vpkt, newpkt)); 1918 if (newpkt) { 1919 scsi_hba_pkt_free(ap, 1920 vpkt->vpkt_tgt_pkt); 1921 } 1922 return (NULL); 1923 } 1924 ASSERT(vpkt->vpkt_hba_pkt != NULL); 1925 ASSERT(vpkt->vpkt_path != NULL); 1926 1927 /* Update the resid for the target driver */ 1928 vpkt->vpkt_tgt_pkt->pkt_resid = 1929 vpkt->vpkt_hba_pkt->pkt_resid; 1930 } 1931 1932 return (vpkt->vpkt_tgt_pkt); 1933 } 1934 1935 /* 1936 * Function name : vhci_scsi_destroy_pkt 1937 * 1938 * Return Values : none 1939 */ 1940 static void 1941 vhci_scsi_destroy_pkt(struct scsi_address *ap, struct scsi_pkt *pkt) 1942 { 1943 struct vhci_pkt *vpkt = (struct vhci_pkt *)pkt->pkt_ha_private; 1944 1945 VHCI_DEBUG(8, (CE_NOTE, NULL, 1946 "vhci_scsi_destroy_pkt: vpkt 0x%p\n", (void *)vpkt)); 1947 1948 vpkt->vpkt_tgt_init_pkt_flags = 0; 1949 if (vpkt->vpkt_hba_pkt) { 1950 scsi_destroy_pkt(vpkt->vpkt_hba_pkt); 1951 vpkt->vpkt_hba_pkt = NULL; 1952 } 1953 if (vpkt->vpkt_path) { 1954 mdi_rele_path(vpkt->vpkt_path); 1955 vpkt->vpkt_path = NULL; 1956 } 1957 1958 ASSERT(vpkt->vpkt_state != VHCI_PKT_ISSUED); 1959 scsi_hba_pkt_free(ap, vpkt->vpkt_tgt_pkt); 1960 } 1961 1962 /* 1963 * Function name : vhci_scsi_dmafree() 1964 * 1965 * Return Values : none 1966 */ 1967 /*ARGSUSED*/ 1968 static void 1969 vhci_scsi_dmafree(struct scsi_address *ap, struct scsi_pkt *pkt) 1970 { 1971 struct vhci_pkt *vpkt = (struct vhci_pkt *)pkt->pkt_ha_private; 1972 1973 VHCI_DEBUG(6, (CE_NOTE, NULL, 1974 "vhci_scsi_dmafree: vpkt 0x%p\n", (void *)vpkt)); 1975 1976 ASSERT(vpkt != NULL); 1977 if (vpkt->vpkt_hba_pkt) { 1978 scsi_destroy_pkt(vpkt->vpkt_hba_pkt); 1979 vpkt->vpkt_hba_pkt = NULL; 1980 } 1981 if (vpkt->vpkt_path) { 1982 mdi_rele_path(vpkt->vpkt_path); 1983 vpkt->vpkt_path = NULL; 1984 } 1985 } 1986 1987 /* 1988 * Function name : vhci_scsi_sync_pkt() 1989 * 1990 * Return Values : none 1991 */ 1992 /*ARGSUSED*/ 1993 static void 1994 vhci_scsi_sync_pkt(struct scsi_address *ap, struct scsi_pkt *pkt) 1995 { 1996 struct vhci_pkt *vpkt = (struct vhci_pkt *)pkt->pkt_ha_private; 1997 1998 ASSERT(vpkt != NULL); 1999 if (vpkt->vpkt_hba_pkt) { 2000 scsi_sync_pkt(vpkt->vpkt_hba_pkt); 2001 } 2002 } 2003 2004 /* 2005 * routine for reset notification setup, to register or cancel. 2006 */ 2007 static int 2008 vhci_scsi_reset_notify(struct scsi_address *ap, int flag, 2009 void (*callback)(caddr_t), caddr_t arg) 2010 { 2011 struct scsi_vhci *vhci = ADDR2VHCI(ap); 2012 return (scsi_hba_reset_notify_setup(ap, flag, callback, arg, 2013 &vhci->vhci_mutex, &vhci->vhci_reset_notify_listf)); 2014 } 2015 2016 static int 2017 vhci_scsi_get_name_bus_addr(struct scsi_device *sd, 2018 char *name, int len, int bus_addr) 2019 { 2020 dev_info_t *cdip; 2021 char *guid; 2022 scsi_vhci_lun_t *vlun; 2023 2024 ASSERT(sd != NULL); 2025 ASSERT(name != NULL); 2026 2027 cdip = sd->sd_dev; 2028 2029 ASSERT(cdip != NULL); 2030 2031 if (mdi_component_is_client(cdip, NULL) != MDI_SUCCESS) { 2032 name[0] = '\0'; 2033 return (1); 2034 } 2035 2036 if (ddi_prop_lookup_string(DDI_DEV_T_ANY, cdip, PROPFLAGS, 2037 MDI_CLIENT_GUID_PROP, &guid) != DDI_SUCCESS) { 2038 name[0] = '\0'; 2039 return (1); 2040 } 2041 2042 vlun = ADDR2VLUN(&sd->sd_address); 2043 if (bus_addr && vlun && vlun->svl_fops_name) { 2044 /* report the guid and the name of the failover module */ 2045 (void) snprintf(name, len, "g%s %s", guid, vlun->svl_fops_name); 2046 } else { 2047 /* report the guid */ 2048 (void) snprintf(name, len, "g%s", guid); 2049 } 2050 2051 ddi_prop_free(guid); 2052 return (1); 2053 } 2054 2055 static int 2056 vhci_scsi_get_bus_addr(struct scsi_device *sd, char *name, int len) 2057 { 2058 return (vhci_scsi_get_name_bus_addr(sd, name, len, 1)); 2059 } 2060 2061 static int 2062 vhci_scsi_get_name(struct scsi_device *sd, char *name, int len) 2063 { 2064 return (vhci_scsi_get_name_bus_addr(sd, name, len, 0)); 2065 } 2066 2067 /* 2068 * Return a pointer to the guid part of the devnm. 2069 * devnm format is "nodename@busaddr", busaddr format is "gGUID". 2070 */ 2071 static char * 2072 vhci_devnm_to_guid(char *devnm) 2073 { 2074 char *cp = devnm; 2075 2076 if (devnm == NULL) 2077 return (NULL); 2078 2079 while (*cp != '\0' && *cp != '@') 2080 cp++; 2081 if (*cp == '@' && *(cp + 1) == 'g') 2082 return (cp + 2); 2083 return (NULL); 2084 } 2085 2086 static int 2087 vhci_bind_transport(struct scsi_address *ap, struct vhci_pkt *vpkt, int flags, 2088 int (*func)(caddr_t)) 2089 { 2090 struct scsi_vhci *vhci = ADDR2VHCI(ap); 2091 dev_info_t *cdip = ADDR2DIP(ap); 2092 mdi_pathinfo_t *pip = NULL; 2093 mdi_pathinfo_t *npip = NULL; 2094 scsi_vhci_priv_t *svp = NULL; 2095 struct scsi_device *psd = NULL; 2096 struct scsi_address *address = NULL; 2097 struct scsi_pkt *pkt = NULL; 2098 int rval = -1; 2099 int pgr_sema_held = 0; 2100 int held; 2101 int mps_flag = MDI_SELECT_ONLINE_PATH; 2102 struct scsi_vhci_lun *vlun; 2103 time_t tnow; 2104 2105 vlun = ADDR2VLUN(ap); 2106 ASSERT(vlun != 0); 2107 2108 if ((vpkt->vpkt_tgt_pkt->pkt_cdbp[0] == SCMD_PROUT) && 2109 (((vpkt->vpkt_tgt_pkt->pkt_cdbp[1] & 0x1f) == 2110 VHCI_PROUT_REGISTER) || 2111 ((vpkt->vpkt_tgt_pkt->pkt_cdbp[1] & 0x1f) == 2112 VHCI_PROUT_R_AND_IGNORE))) { 2113 if (!sema_tryp(&vlun->svl_pgr_sema)) 2114 return (TRAN_BUSY); 2115 pgr_sema_held = 1; 2116 if (vlun->svl_first_path != NULL) { 2117 rval = mdi_select_path(cdip, NULL, 2118 MDI_SELECT_ONLINE_PATH | MDI_SELECT_STANDBY_PATH, 2119 NULL, &pip); 2120 if ((rval != MDI_SUCCESS) || (pip == NULL)) { 2121 VHCI_DEBUG(4, (CE_NOTE, NULL, 2122 "vhci_bind_transport: path select fail\n")); 2123 } else { 2124 npip = pip; 2125 do { 2126 if (npip == vlun->svl_first_path) { 2127 VHCI_DEBUG(4, (CE_NOTE, NULL, 2128 "vhci_bind_transport: " 2129 "valid first path 0x%p\n", 2130 (void *) 2131 vlun->svl_first_path)); 2132 pip = vlun->svl_first_path; 2133 goto bind_path; 2134 } 2135 pip = npip; 2136 rval = mdi_select_path(cdip, NULL, 2137 MDI_SELECT_ONLINE_PATH | 2138 MDI_SELECT_STANDBY_PATH, 2139 pip, &npip); 2140 mdi_rele_path(pip); 2141 } while ((rval == MDI_SUCCESS) && 2142 (npip != NULL)); 2143 } 2144 } 2145 2146 if (vlun->svl_first_path) { 2147 VHCI_DEBUG(4, (CE_NOTE, NULL, 2148 "vhci_bind_transport: invalid first path 0x%p\n", 2149 (void *)vlun->svl_first_path)); 2150 vlun->svl_first_path = NULL; 2151 } 2152 } else if (vpkt->vpkt_tgt_pkt->pkt_cdbp[0] == SCMD_PRIN) { 2153 if ((vpkt->vpkt_state & VHCI_PKT_THRU_TASKQ) == 0) { 2154 if (!sema_tryp(&vlun->svl_pgr_sema)) 2155 return (TRAN_BUSY); 2156 } 2157 pgr_sema_held = 1; 2158 } 2159 2160 /* 2161 * If the path is already bound for PKT_PARTIAL_DMA case, 2162 * try to use the same path. 2163 */ 2164 if ((vpkt->vpkt_flags & CFLAG_DMA_PARTIAL) && vpkt->vpkt_path) { 2165 VHCI_DEBUG(4, (CE_NOTE, NULL, 2166 "vhci_bind_transport: PKT_PARTIAL_DMA " 2167 "vpkt 0x%p, path 0x%p\n", 2168 (void *)vpkt, (void *)vpkt->vpkt_path)); 2169 pip = vpkt->vpkt_path; 2170 goto bind_path; 2171 } 2172 2173 /* 2174 * If reservation is active bind the transport directly to the pip 2175 * with the reservation. 2176 */ 2177 if (vpkt->vpkt_hba_pkt == NULL) { 2178 if (vlun->svl_flags & VLUN_RESERVE_ACTIVE_FLG) { 2179 if (MDI_PI_IS_ONLINE(vlun->svl_resrv_pip)) { 2180 pip = vlun->svl_resrv_pip; 2181 mdi_hold_path(pip); 2182 vlun->svl_waiting_for_activepath = 0; 2183 rval = MDI_SUCCESS; 2184 goto bind_path; 2185 } else { 2186 if (pgr_sema_held) { 2187 sema_v(&vlun->svl_pgr_sema); 2188 } 2189 return (TRAN_BUSY); 2190 } 2191 } 2192 try_again: 2193 rval = mdi_select_path(cdip, vpkt->vpkt_tgt_init_bp, 0, NULL, 2194 &pip); 2195 if (rval == MDI_BUSY) { 2196 if (pgr_sema_held) { 2197 sema_v(&vlun->svl_pgr_sema); 2198 } 2199 return (TRAN_BUSY); 2200 } else if (rval == MDI_DEVI_ONLINING) { 2201 /* 2202 * if we are here then we are in the midst of 2203 * an attach/probe of the client device. 2204 * We attempt to bind to ONLINE path if available, 2205 * else it is OK to bind to a STANDBY path (instead 2206 * of triggering a failover) because IO associated 2207 * with attach/probe (eg. INQUIRY, block 0 read) 2208 * are completed by targets even on passive paths 2209 * If no ONLINE paths available, it is important 2210 * to set svl_waiting_for_activepath for two 2211 * reasons: (1) avoid sense analysis in the 2212 * "external failure detection" codepath in 2213 * vhci_intr(). Failure to do so will result in 2214 * infinite loop (unless an ONLINE path becomes 2215 * available at some point) (2) avoid 2216 * unnecessary failover (see "---Waiting For Active 2217 * Path---" comment below). 2218 */ 2219 VHCI_DEBUG(1, (CE_NOTE, NULL, "!%p in onlining " 2220 "state\n", (void *)cdip)); 2221 pip = NULL; 2222 rval = mdi_select_path(cdip, vpkt->vpkt_tgt_init_bp, 2223 mps_flag, NULL, &pip); 2224 if ((rval != MDI_SUCCESS) || (pip == NULL)) { 2225 if (vlun->svl_waiting_for_activepath == 0) { 2226 vlun->svl_waiting_for_activepath = 1; 2227 vlun->svl_wfa_time = ddi_get_time(); 2228 } 2229 mps_flag |= MDI_SELECT_STANDBY_PATH; 2230 rval = mdi_select_path(cdip, 2231 vpkt->vpkt_tgt_init_bp, 2232 mps_flag, NULL, &pip); 2233 if ((rval != MDI_SUCCESS) || (pip == NULL)) { 2234 if (pgr_sema_held) { 2235 sema_v(&vlun->svl_pgr_sema); 2236 } 2237 return (TRAN_FATAL_ERROR); 2238 } 2239 goto bind_path; 2240 } 2241 } else if (rval == MDI_FAILURE) { 2242 if (pgr_sema_held) { 2243 sema_v(&vlun->svl_pgr_sema); 2244 } 2245 return (TRAN_FATAL_ERROR); 2246 } 2247 2248 if ((pip == NULL) || (rval == MDI_NOPATH)) { 2249 while (vlun->svl_waiting_for_activepath) { 2250 /* 2251 * ---Waiting For Active Path--- 2252 * This device was discovered across a 2253 * passive path; lets wait for a little 2254 * bit, hopefully an active path will 2255 * show up obviating the need for a 2256 * failover 2257 */ 2258 tnow = ddi_get_time(); 2259 if (tnow - vlun->svl_wfa_time >= 60) { 2260 vlun->svl_waiting_for_activepath = 0; 2261 } else { 2262 drv_usecwait(1000); 2263 if (vlun->svl_waiting_for_activepath 2264 == 0) { 2265 /* 2266 * an active path has come 2267 * online! 2268 */ 2269 goto try_again; 2270 } 2271 } 2272 } 2273 VHCI_HOLD_LUN(vlun, VH_NOSLEEP, held); 2274 if (!held) { 2275 VHCI_DEBUG(4, (CE_NOTE, NULL, 2276 "!Lun not held\n")); 2277 if (pgr_sema_held) { 2278 sema_v(&vlun->svl_pgr_sema); 2279 } 2280 return (TRAN_BUSY); 2281 } 2282 /* 2283 * now that the LUN is stable, one last check 2284 * to make sure no other changes sneaked in 2285 * (like a path coming online or a 2286 * failover initiated by another thread) 2287 */ 2288 pip = NULL; 2289 rval = mdi_select_path(cdip, vpkt->vpkt_tgt_init_bp, 2290 0, NULL, &pip); 2291 if (pip != NULL) { 2292 VHCI_RELEASE_LUN(vlun); 2293 vlun->svl_waiting_for_activepath = 0; 2294 goto bind_path; 2295 } 2296 2297 /* 2298 * Check if there is an ONLINE path OR a STANDBY path 2299 * available. If none is available, do not attempt 2300 * to do a failover, just return a fatal error at this 2301 * point. 2302 */ 2303 npip = NULL; 2304 rval = mdi_select_path(cdip, NULL, 2305 (MDI_SELECT_ONLINE_PATH | MDI_SELECT_STANDBY_PATH), 2306 NULL, &npip); 2307 if ((npip == NULL) || (rval != MDI_SUCCESS)) { 2308 /* 2309 * No paths available, jus return FATAL error. 2310 */ 2311 VHCI_RELEASE_LUN(vlun); 2312 if (pgr_sema_held) { 2313 sema_v(&vlun->svl_pgr_sema); 2314 } 2315 return (TRAN_FATAL_ERROR); 2316 } 2317 mdi_rele_path(npip); 2318 VHCI_DEBUG(1, (CE_NOTE, NULL, "!invoking " 2319 "mdi_failover\n")); 2320 rval = mdi_failover(vhci->vhci_dip, cdip, 2321 MDI_FAILOVER_ASYNC); 2322 if (rval == MDI_FAILURE) { 2323 VHCI_RELEASE_LUN(vlun); 2324 if (pgr_sema_held) { 2325 sema_v(&vlun->svl_pgr_sema); 2326 } 2327 return (TRAN_FATAL_ERROR); 2328 } else if (rval == MDI_BUSY) { 2329 VHCI_RELEASE_LUN(vlun); 2330 if (pgr_sema_held) { 2331 sema_v(&vlun->svl_pgr_sema); 2332 } 2333 return (TRAN_BUSY); 2334 } else { 2335 if (pgr_sema_held) { 2336 sema_v(&vlun->svl_pgr_sema); 2337 } 2338 return (TRAN_BUSY); 2339 } 2340 } 2341 vlun->svl_waiting_for_activepath = 0; 2342 bind_path: 2343 vpkt->vpkt_path = pip; 2344 svp = (scsi_vhci_priv_t *)mdi_pi_get_vhci_private(pip); 2345 ASSERT(svp != NULL); 2346 2347 psd = svp->svp_psd; 2348 ASSERT(psd != NULL); 2349 address = &psd->sd_address; 2350 } else { 2351 pkt = vpkt->vpkt_hba_pkt; 2352 address = &pkt->pkt_address; 2353 } 2354 2355 /* 2356 * For PKT_PARTIAL_DMA case, call pHCI's scsi_init_pkt whenever 2357 * target driver calls vhci_scsi_init_pkt. 2358 */ 2359 if ((vpkt->vpkt_flags & CFLAG_DMA_PARTIAL) && 2360 vpkt->vpkt_path && vpkt->vpkt_hba_pkt) { 2361 VHCI_DEBUG(4, (CE_NOTE, NULL, 2362 "vhci_bind_transport: PKT_PARTIAL_DMA " 2363 "vpkt 0x%p, path 0x%p hba_pkt 0x%p\n", 2364 (void *)vpkt, (void *)vpkt->vpkt_path, (void *)pkt)); 2365 pkt = vpkt->vpkt_hba_pkt; 2366 address = &pkt->pkt_address; 2367 } 2368 2369 if (pkt == NULL || (vpkt->vpkt_flags & CFLAG_DMA_PARTIAL)) { 2370 pkt = scsi_init_pkt(address, pkt, 2371 vpkt->vpkt_tgt_init_bp, vpkt->vpkt_tgt_init_cdblen, 2372 vpkt->vpkt_tgt_init_scblen, 2373 vpkt->vpkt_tgt_init_privlen, flags, func, NULL); 2374 2375 if (pkt == NULL) { 2376 VHCI_DEBUG(4, (CE_NOTE, NULL, 2377 "!bind transport: 0x%p 0x%p 0x%p\n", 2378 (void *)vhci, (void *)psd, (void *)vpkt)); 2379 if ((vpkt->vpkt_hba_pkt == NULL) && vpkt->vpkt_path) { 2380 MDI_PI_ERRSTAT(vpkt->vpkt_path, 2381 MDI_PI_TRANSERR); 2382 mdi_rele_path(vpkt->vpkt_path); 2383 vpkt->vpkt_path = NULL; 2384 } 2385 if (pgr_sema_held) { 2386 sema_v(&vlun->svl_pgr_sema); 2387 } 2388 /* 2389 * Looks like a fatal error. 2390 * May be device disappeared underneath. 2391 * Give another chance to target driver for a retry to 2392 * get another path. 2393 */ 2394 return (TRAN_BUSY); 2395 } 2396 } 2397 2398 pkt->pkt_private = vpkt; 2399 vpkt->vpkt_hba_pkt = pkt; 2400 return (TRAN_ACCEPT); 2401 } 2402 2403 2404 /*PRINTFLIKE3*/ 2405 void 2406 vhci_log(int level, dev_info_t *dip, const char *fmt, ...) 2407 { 2408 char buf[256]; 2409 va_list ap; 2410 2411 va_start(ap, fmt); 2412 (void) vsprintf(buf, fmt, ap); 2413 va_end(ap); 2414 2415 scsi_log(dip, "scsi_vhci", level, buf); 2416 } 2417 2418 /* do a PGR out with the information we've saved away */ 2419 static int 2420 vhci_do_prout(scsi_vhci_priv_t *svp) 2421 { 2422 2423 struct scsi_pkt *new_pkt; 2424 struct buf *bp; 2425 scsi_vhci_lun_t *vlun; 2426 int rval, retry, nr_retry, ua_retry; 2427 struct scsi_extended_sense *sns; 2428 2429 bp = getrbuf(KM_SLEEP); 2430 bp->b_flags = B_WRITE; 2431 bp->b_resid = 0; 2432 2433 VHCI_INCR_PATH_CMDCOUNT(svp); 2434 vlun = svp->svp_svl; 2435 2436 new_pkt = scsi_init_pkt(&svp->svp_psd->sd_address, NULL, bp, 2437 CDB_GROUP1, sizeof (struct scsi_arq_status), 0, 0, 2438 SLEEP_FUNC, NULL); 2439 if (new_pkt == NULL) { 2440 VHCI_DECR_PATH_CMDCOUNT(svp); 2441 freerbuf(bp); 2442 cmn_err(CE_WARN, "!vhci_do_prout: scsi_init_pkt failed"); 2443 return (0); 2444 } 2445 mutex_enter(&vlun->svl_mutex); 2446 bp->b_un.b_addr = (caddr_t)&vlun->svl_prout; 2447 bp->b_bcount = vlun->svl_bcount; 2448 bcopy(vlun->svl_cdb, new_pkt->pkt_cdbp, 2449 sizeof (vlun->svl_cdb)); 2450 new_pkt->pkt_time = vlun->svl_time; 2451 mutex_exit(&vlun->svl_mutex); 2452 new_pkt->pkt_flags = FLAG_NOINTR; 2453 2454 ua_retry = nr_retry = retry = 0; 2455 again: 2456 rval = vhci_do_scsi_cmd(new_pkt); 2457 if (rval != 1) { 2458 if ((new_pkt->pkt_reason == CMD_CMPLT) && 2459 (SCBP_C(new_pkt) == STATUS_CHECK) && 2460 (new_pkt->pkt_state & STATE_ARQ_DONE)) { 2461 sns = &(((struct scsi_arq_status *)(uintptr_t) 2462 (new_pkt->pkt_scbp))->sts_sensedata); 2463 if ((sns->es_key == KEY_UNIT_ATTENTION) || 2464 (sns->es_key == KEY_NOT_READY)) { 2465 int max_retry; 2466 struct scsi_failover_ops *fops; 2467 fops = vlun->svl_fops; 2468 rval = (*fops->sfo_analyze_sense) 2469 (svp->svp_psd, sns, 2470 vlun->svl_fops_ctpriv); 2471 if (rval == SCSI_SENSE_NOT_READY) { 2472 max_retry = vhci_prout_not_ready_retry; 2473 retry = nr_retry++; 2474 delay(1*drv_usectohz(1000000)); 2475 } else { 2476 /* chk for state change and update */ 2477 if (rval == SCSI_SENSE_STATE_CHANGED) { 2478 int held; 2479 VHCI_HOLD_LUN(vlun, 2480 VH_NOSLEEP, held); 2481 if (!held) { 2482 rval = TRAN_BUSY; 2483 } else { 2484 /* chk for alua first */ 2485 vhci_update_pathstates( 2486 (void *)vlun); 2487 } 2488 } 2489 retry = ua_retry++; 2490 max_retry = VHCI_MAX_PGR_RETRIES; 2491 } 2492 if (retry < max_retry) { 2493 VHCI_DEBUG(4, (CE_WARN, NULL, 2494 "!vhci_do_prout retry 0x%x " 2495 "(0x%x 0x%x 0x%x)", 2496 SCBP_C(new_pkt), 2497 new_pkt->pkt_cdbp[0], 2498 new_pkt->pkt_cdbp[1], 2499 new_pkt->pkt_cdbp[2])); 2500 goto again; 2501 } 2502 rval = 0; 2503 VHCI_DEBUG(4, (CE_WARN, NULL, 2504 "!vhci_do_prout 0x%x " 2505 "(0x%x 0x%x 0x%x)", 2506 SCBP_C(new_pkt), 2507 new_pkt->pkt_cdbp[0], 2508 new_pkt->pkt_cdbp[1], 2509 new_pkt->pkt_cdbp[2])); 2510 } else if (sns->es_key == KEY_ILLEGAL_REQUEST) 2511 rval = VHCI_PGR_ILLEGALOP; 2512 } 2513 } else { 2514 rval = 1; 2515 } 2516 scsi_destroy_pkt(new_pkt); 2517 VHCI_DECR_PATH_CMDCOUNT(svp); 2518 freerbuf(bp); 2519 return (rval); 2520 } 2521 2522 static void 2523 vhci_run_cmd(void *arg) 2524 { 2525 struct scsi_pkt *pkt = (struct scsi_pkt *)arg; 2526 struct scsi_pkt *tpkt; 2527 scsi_vhci_priv_t *svp; 2528 mdi_pathinfo_t *pip, *npip; 2529 scsi_vhci_lun_t *vlun; 2530 dev_info_t *cdip; 2531 scsi_vhci_priv_t *nsvp; 2532 int fail = 0; 2533 int rval; 2534 struct vhci_pkt *vpkt; 2535 uchar_t cdb_1; 2536 vhci_prout_t *prout; 2537 2538 vpkt = (struct vhci_pkt *)pkt->pkt_private; 2539 tpkt = vpkt->vpkt_tgt_pkt; 2540 pip = vpkt->vpkt_path; 2541 svp = (scsi_vhci_priv_t *)mdi_pi_get_vhci_private(pip); 2542 if (svp == NULL) { 2543 tpkt->pkt_reason = CMD_TRAN_ERR; 2544 tpkt->pkt_statistics = STAT_ABORTED; 2545 goto done; 2546 } 2547 vlun = svp->svp_svl; 2548 prout = &vlun->svl_prout; 2549 if (SCBP_C(pkt) != STATUS_GOOD) 2550 fail++; 2551 cdip = vlun->svl_dip; 2552 pip = npip = NULL; 2553 rval = mdi_select_path(cdip, NULL, 2554 MDI_SELECT_ONLINE_PATH|MDI_SELECT_STANDBY_PATH, NULL, &npip); 2555 if ((rval != MDI_SUCCESS) || (npip == NULL)) { 2556 VHCI_DEBUG(4, (CE_NOTE, NULL, 2557 "vhci_run_cmd: no path! 0x%p\n", (void *)svp)); 2558 tpkt->pkt_reason = CMD_TRAN_ERR; 2559 tpkt->pkt_statistics = STAT_ABORTED; 2560 goto done; 2561 } 2562 2563 cdb_1 = vlun->svl_cdb[1]; 2564 vlun->svl_cdb[1] &= 0xe0; 2565 vlun->svl_cdb[1] |= VHCI_PROUT_R_AND_IGNORE; 2566 2567 do { 2568 nsvp = (scsi_vhci_priv_t *) 2569 mdi_pi_get_vhci_private(npip); 2570 if (nsvp == NULL) { 2571 VHCI_DEBUG(4, (CE_NOTE, NULL, 2572 "vhci_run_cmd: no " 2573 "client priv! 0x%p offlined?\n", 2574 (void *)npip)); 2575 goto next_path; 2576 } 2577 if (vlun->svl_first_path == npip) { 2578 goto next_path; 2579 } else { 2580 if (vhci_do_prout(nsvp) != 1) 2581 fail++; 2582 } 2583 next_path: 2584 pip = npip; 2585 rval = mdi_select_path(cdip, NULL, 2586 MDI_SELECT_ONLINE_PATH|MDI_SELECT_STANDBY_PATH, 2587 pip, &npip); 2588 mdi_rele_path(pip); 2589 } while ((rval == MDI_SUCCESS) && (npip != NULL)); 2590 2591 vlun->svl_cdb[1] = cdb_1; 2592 2593 if (fail) { 2594 VHCI_DEBUG(4, (CE_WARN, NULL, "%s%d: key registration failed, " 2595 "couldn't be replicated on all paths", 2596 ddi_driver_name(cdip), ddi_get_instance(cdip))); 2597 vhci_print_prout_keys(vlun, "vhci_run_cmd: "); 2598 2599 if (SCBP_C(pkt) != STATUS_GOOD) { 2600 tpkt->pkt_reason = CMD_TRAN_ERR; 2601 tpkt->pkt_statistics = STAT_ABORTED; 2602 } 2603 } else { 2604 vlun->svl_pgr_active = 1; 2605 vhci_print_prout_keys(vlun, "vhci_run_cmd: before bcopy:"); 2606 2607 bcopy((const void *)prout->service_key, 2608 (void *)prout->active_service_key, MHIOC_RESV_KEY_SIZE); 2609 bcopy((const void *)prout->res_key, 2610 (void *)prout->active_res_key, MHIOC_RESV_KEY_SIZE); 2611 2612 vhci_print_prout_keys(vlun, "vhci_run_cmd: after bcopy:"); 2613 } 2614 done: 2615 if (SCBP_C(pkt) == STATUS_GOOD) 2616 vlun->svl_first_path = NULL; 2617 2618 if (svp) 2619 VHCI_DECR_PATH_CMDCOUNT(svp); 2620 2621 if ((vpkt->vpkt_flags & CFLAG_DMA_PARTIAL) == 0) { 2622 scsi_destroy_pkt(pkt); 2623 vpkt->vpkt_hba_pkt = NULL; 2624 if (vpkt->vpkt_path) { 2625 mdi_rele_path(vpkt->vpkt_path); 2626 vpkt->vpkt_path = NULL; 2627 } 2628 } 2629 2630 sema_v(&vlun->svl_pgr_sema); 2631 /* 2632 * The PROUT commands are not included in the automatic retry 2633 * mechanism, therefore, vpkt_org_vpkt should never be set here. 2634 */ 2635 ASSERT(vpkt->vpkt_org_vpkt == NULL); 2636 if (tpkt->pkt_comp) 2637 (*tpkt->pkt_comp)(tpkt); 2638 2639 } 2640 2641 /* 2642 * Get the keys registered with this target. Since we will have 2643 * registered the same key with multiple initiators, strip out 2644 * any duplicate keys. 2645 * 2646 * The pointers which will be used to filter the registered keys from 2647 * the device will be stored in filter_prin and filter_pkt. If the 2648 * allocation length of the buffer was sufficient for the number of 2649 * parameter data bytes available to be returned by the device then the 2650 * key filtering will use the keylist returned from the original 2651 * request. If the allocation length of the buffer was not sufficient, 2652 * then the filtering will use the keylist returned from the request 2653 * that is resent below. 2654 * 2655 * If the device returns an additional length field that is greater than 2656 * the allocation length of the buffer, then allocate a new buffer which 2657 * can accommodate the number of parameter data bytes available to be 2658 * returned. Resend the scsi PRIN command, filter out the duplicate 2659 * keys and return as many of the unique keys found that was originally 2660 * requested and set the additional length field equal to the data bytes 2661 * of unique reservation keys available to be returned. 2662 * 2663 * If the device returns an additional length field that is less than or 2664 * equal to the allocation length of the buffer, then all the available 2665 * keys registered were returned by the device. Filter out the 2666 * duplicate keys and return all of the unique keys found and set the 2667 * additional length field equal to the data bytes of the reservation 2668 * keys to be returned. 2669 */ 2670 static int 2671 vhci_do_prin(struct vhci_pkt **vpkt) 2672 { 2673 scsi_vhci_priv_t *svp = (scsi_vhci_priv_t *) 2674 mdi_pi_get_vhci_private((*vpkt)->vpkt_path); 2675 vhci_prin_readkeys_t *prin; 2676 scsi_vhci_lun_t *vlun = svp->svp_svl; 2677 struct scsi_vhci *vhci = 2678 ADDR2VHCI(&((*vpkt)->vpkt_tgt_pkt->pkt_address)); 2679 2680 struct buf *new_bp = NULL; 2681 struct scsi_pkt *new_pkt = NULL; 2682 struct vhci_pkt *new_vpkt = NULL; 2683 int hdr_len = 0; 2684 int rval = VHCI_CMD_CMPLT; 2685 uint32_t prin_length = 0; 2686 uint32_t svl_prin_length = 0; 2687 2688 prin = (vhci_prin_readkeys_t *) 2689 bp_mapin_common((*vpkt)->vpkt_tgt_init_bp, VM_NOSLEEP); 2690 2691 if (prin != NULL) { 2692 prin_length = BE_32(prin->length); 2693 } 2694 2695 if (prin == NULL) { 2696 VHCI_DEBUG(5, (CE_WARN, NULL, 2697 "vhci_do_prin: bp_mapin_common failed.")); 2698 rval = VHCI_CMD_ERROR; 2699 } else { 2700 /* 2701 * According to SPC-3r22, sec 4.3.4.6: "If the amount of 2702 * information to be transferred exceeds the maximum value 2703 * that the ALLOCATION LENGTH field is capable of specifying, 2704 * the device server shall...terminate the command with CHECK 2705 * CONDITION status". The ALLOCATION LENGTH field of the 2706 * PERSISTENT RESERVE IN command is 2 bytes. We should never 2707 * get here with an ADDITIONAL LENGTH greater than 0xFFFF 2708 * so if we do, then it is an error! 2709 */ 2710 2711 hdr_len = sizeof (prin->length) + sizeof (prin->generation); 2712 2713 if ((prin_length + hdr_len) > 0xFFFF) { 2714 VHCI_DEBUG(5, (CE_NOTE, NULL, 2715 "vhci_do_prin: Device returned invalid " 2716 "length 0x%x\n", prin_length)); 2717 rval = VHCI_CMD_ERROR; 2718 } 2719 } 2720 2721 /* 2722 * If prin->length is greater than the byte count allocated in the 2723 * original buffer, then resend the request with enough buffer 2724 * allocated to get all of the available registered keys. 2725 */ 2726 if (rval != VHCI_CMD_ERROR) { 2727 if (((*vpkt)->vpkt_tgt_init_bp->b_bcount - hdr_len) < 2728 prin_length) { 2729 if ((*vpkt)->vpkt_org_vpkt == NULL) { 2730 new_pkt = vhci_create_retry_pkt(*vpkt); 2731 if (new_pkt != NULL) { 2732 new_vpkt = TGTPKT2VHCIPKT(new_pkt); 2733 2734 /* 2735 * This is the buf with buffer pointer 2736 * where the prin readkeys will be 2737 * returned from the device 2738 */ 2739 new_bp = scsi_alloc_consistent_buf( 2740 &svp->svp_psd->sd_address, 2741 NULL, (prin_length + hdr_len), 2742 ((*vpkt)->vpkt_tgt_init_bp-> 2743 b_flags & (B_READ | B_WRITE)), 2744 NULL_FUNC, NULL); 2745 if (new_bp != NULL) { 2746 if (new_bp->b_un.b_addr != 2747 NULL) { 2748 2749 new_bp->b_bcount = 2750 prin_length + 2751 hdr_len; 2752 2753 new_pkt->pkt_cdbp[7] = 2754 (uchar_t)(new_bp-> 2755 b_bcount >> 8); 2756 new_pkt->pkt_cdbp[8] = 2757 (uchar_t)new_bp-> 2758 b_bcount; 2759 2760 rval = VHCI_CMD_RETRY; 2761 } else { 2762 rval = VHCI_CMD_ERROR; 2763 } 2764 } else { 2765 rval = VHCI_CMD_ERROR; 2766 } 2767 } else { 2768 rval = VHCI_CMD_ERROR; 2769 } 2770 } else { 2771 rval = VHCI_CMD_ERROR; 2772 } 2773 } 2774 } 2775 2776 if (rval == VHCI_CMD_RETRY) { 2777 new_vpkt->vpkt_tgt_init_bp = new_bp; 2778 2779 /* 2780 * Release the old path because it does not matter which path 2781 * this command is sent down. This allows the normal bind 2782 * transport mechanism to be used. 2783 */ 2784 if ((*vpkt)->vpkt_path != NULL) { 2785 mdi_rele_path((*vpkt)->vpkt_path); 2786 (*vpkt)->vpkt_path = NULL; 2787 } 2788 2789 /* 2790 * Dispatch the retry command 2791 */ 2792 if (taskq_dispatch(vhci->vhci_taskq, vhci_dispatch_scsi_start, 2793 (void *) new_vpkt, KM_NOSLEEP) == NULL) { 2794 rval = VHCI_CMD_ERROR; 2795 } else { 2796 /* 2797 * If we return VHCI_CMD_RETRY, that means the caller 2798 * is going to bail and wait for the reissued command 2799 * to complete. In that case, we need to decrement 2800 * the path command count right now. In any other 2801 * case, it'll be decremented by the caller. 2802 */ 2803 VHCI_DECR_PATH_CMDCOUNT(svp); 2804 } 2805 } 2806 2807 if ((rval != VHCI_CMD_ERROR) && (rval != VHCI_CMD_RETRY)) { 2808 int new, old; 2809 int data_len = 0; 2810 2811 data_len = prin_length / MHIOC_RESV_KEY_SIZE; 2812 VHCI_DEBUG(4, (CE_NOTE, NULL, "vhci_do_prin: %d keys read\n", 2813 data_len)); 2814 2815 #ifdef DEBUG 2816 VHCI_DEBUG(5, (CE_NOTE, NULL, "vhci_do_prin: from storage\n")); 2817 if (vhci_debug == 5) 2818 vhci_print_prin_keys(prin, data_len); 2819 VHCI_DEBUG(5, (CE_NOTE, NULL, 2820 "vhci_do_prin: MPxIO old keys:\n")); 2821 if (vhci_debug == 5) 2822 vhci_print_prin_keys(&vlun->svl_prin, data_len); 2823 #endif 2824 2825 /* 2826 * Filter out all duplicate keys returned from the device 2827 * We know that we use a different key for every host, so we 2828 * can simply strip out duplicates. Otherwise we would need to 2829 * do more bookkeeping to figure out which keys to strip out. 2830 */ 2831 2832 new = 0; 2833 2834 if (data_len > 0) { 2835 vlun->svl_prin.keylist[0] = prin->keylist[0]; 2836 new++; 2837 } 2838 2839 for (old = 1; old < data_len; old++) { 2840 int j; 2841 int match = 0; 2842 for (j = 0; j < new; j++) { 2843 if (bcmp(&prin->keylist[old], 2844 &vlun->svl_prin.keylist[j], 2845 sizeof (mhioc_resv_key_t)) == 0) { 2846 match = 1; 2847 break; 2848 } 2849 } 2850 if (!match) { 2851 vlun->svl_prin.keylist[new] = 2852 prin->keylist[old]; 2853 new++; 2854 } 2855 } 2856 2857 vlun->svl_prin.generation = prin->generation; 2858 svl_prin_length = new * MHIOC_RESV_KEY_SIZE; 2859 vlun->svl_prin.length = BE_32(svl_prin_length); 2860 2861 /* 2862 * If we arrived at this point after issuing a retry, make sure 2863 * that we put everything back the way it originally was so 2864 * that the target driver can complete the command correctly. 2865 */ 2866 if ((*vpkt)->vpkt_org_vpkt != NULL) { 2867 new_bp = (*vpkt)->vpkt_tgt_init_bp; 2868 2869 scsi_free_consistent_buf(new_bp); 2870 2871 *vpkt = vhci_sync_retry_pkt(*vpkt); 2872 2873 /* 2874 * Make sure the original buffer is mapped into kernel 2875 * space before we try to copy the filtered keys into 2876 * it. 2877 */ 2878 prin = (vhci_prin_readkeys_t *)bp_mapin_common( 2879 (*vpkt)->vpkt_tgt_init_bp, VM_NOSLEEP); 2880 } 2881 2882 /* 2883 * Now copy the desired number of prin keys into the original 2884 * target buffer. 2885 */ 2886 if (svl_prin_length <= 2887 ((*vpkt)->vpkt_tgt_init_bp->b_bcount - hdr_len)) { 2888 /* 2889 * It is safe to return all of the available unique 2890 * keys 2891 */ 2892 bcopy(&vlun->svl_prin, prin, svl_prin_length + hdr_len); 2893 } else { 2894 /* 2895 * Not all of the available keys were requested by the 2896 * original command. 2897 */ 2898 bcopy(&vlun->svl_prin, prin, 2899 (*vpkt)->vpkt_tgt_init_bp->b_bcount); 2900 } 2901 #ifdef DEBUG 2902 VHCI_DEBUG(5, (CE_NOTE, NULL, 2903 "vhci_do_prin: To Application:\n")); 2904 if (vhci_debug == 5) 2905 vhci_print_prin_keys(prin, new); 2906 VHCI_DEBUG(5, (CE_NOTE, NULL, 2907 "vhci_do_prin: MPxIO new keys:\n")); 2908 if (vhci_debug == 5) 2909 vhci_print_prin_keys(&vlun->svl_prin, new); 2910 #endif 2911 } 2912 2913 if (rval == VHCI_CMD_ERROR) { 2914 /* 2915 * If we arrived at this point after issuing a 2916 * retry, make sure that we put everything back 2917 * the way it originally was so that ssd can 2918 * complete the command correctly. 2919 */ 2920 2921 if ((*vpkt)->vpkt_org_vpkt != NULL) { 2922 new_bp = (*vpkt)->vpkt_tgt_init_bp; 2923 if (new_bp != NULL) { 2924 scsi_free_consistent_buf(new_bp); 2925 } 2926 2927 new_vpkt = *vpkt; 2928 *vpkt = (*vpkt)->vpkt_org_vpkt; 2929 2930 vhci_scsi_destroy_pkt(&svp->svp_psd->sd_address, 2931 new_vpkt->vpkt_tgt_pkt); 2932 } 2933 2934 /* 2935 * Mark this command completion as having an error so that 2936 * ssd will retry the command. 2937 */ 2938 2939 (*vpkt)->vpkt_tgt_pkt->pkt_reason = CMD_ABORTED; 2940 (*vpkt)->vpkt_tgt_pkt->pkt_statistics |= STAT_ABORTED; 2941 2942 rval = VHCI_CMD_CMPLT; 2943 } 2944 2945 /* 2946 * Make sure that the semaphore is only released once. 2947 */ 2948 if (rval == VHCI_CMD_CMPLT) { 2949 sema_v(&vlun->svl_pgr_sema); 2950 } 2951 2952 return (rval); 2953 } 2954 2955 static void 2956 vhci_intr(struct scsi_pkt *pkt) 2957 { 2958 struct vhci_pkt *vpkt = (struct vhci_pkt *)pkt->pkt_private; 2959 struct scsi_pkt *tpkt; 2960 scsi_vhci_priv_t *svp; 2961 scsi_vhci_lun_t *vlun; 2962 int rval, held; 2963 struct scsi_failover_ops *fops; 2964 struct scsi_extended_sense *sns; 2965 mdi_pathinfo_t *lpath; 2966 static char *timeout_err = "Command Timeout"; 2967 static char *parity_err = "Parity Error"; 2968 char *err_str = NULL; 2969 dev_info_t *vdip, *cdip, *pdip; 2970 char *cpath, *dpath; 2971 2972 ASSERT(vpkt != NULL); 2973 tpkt = vpkt->vpkt_tgt_pkt; 2974 ASSERT(tpkt != NULL); 2975 svp = (scsi_vhci_priv_t *)mdi_pi_get_vhci_private(vpkt->vpkt_path); 2976 ASSERT(svp != NULL); 2977 vlun = svp->svp_svl; 2978 ASSERT(vlun != NULL); 2979 lpath = vpkt->vpkt_path; 2980 2981 /* 2982 * sync up the target driver's pkt with the pkt that 2983 * we actually used 2984 */ 2985 *(tpkt->pkt_scbp) = *(pkt->pkt_scbp); 2986 tpkt->pkt_resid = pkt->pkt_resid; 2987 tpkt->pkt_state = pkt->pkt_state; 2988 tpkt->pkt_statistics = pkt->pkt_statistics; 2989 tpkt->pkt_reason = pkt->pkt_reason; 2990 2991 if (pkt->pkt_cdbp[0] == SCMD_PROUT && 2992 ((pkt->pkt_cdbp[1] & 0x1f) == VHCI_PROUT_REGISTER) || 2993 ((pkt->pkt_cdbp[1] & 0x1f) == VHCI_PROUT_R_AND_IGNORE)) { 2994 if ((SCBP_C(pkt) != STATUS_GOOD) || 2995 (pkt->pkt_reason != CMD_CMPLT)) { 2996 sema_v(&vlun->svl_pgr_sema); 2997 } 2998 } else if (pkt->pkt_cdbp[0] == SCMD_PRIN) { 2999 if (pkt->pkt_reason != CMD_CMPLT || 3000 (SCBP_C(pkt) != STATUS_GOOD)) { 3001 sema_v(&vlun->svl_pgr_sema); 3002 } 3003 } 3004 3005 switch (pkt->pkt_reason) { 3006 case CMD_CMPLT: 3007 /* 3008 * cmd completed successfully, check for scsi errors 3009 */ 3010 switch (*(pkt->pkt_scbp)) { 3011 case STATUS_CHECK: 3012 if (pkt->pkt_state & STATE_ARQ_DONE) { 3013 sns = &(((struct scsi_arq_status *)(uintptr_t) 3014 (pkt->pkt_scbp))->sts_sensedata); 3015 fops = vlun->svl_fops; 3016 ASSERT(fops != NULL); 3017 VHCI_DEBUG(4, (CE_NOTE, NULL, "vhci_intr: " 3018 "Received sns key %x esc %x escq %x\n", 3019 sns->es_key, sns->es_add_code, 3020 sns->es_qual_code)); 3021 3022 if (vlun->svl_waiting_for_activepath == 1) { 3023 /* 3024 * if we are here it means we are 3025 * in the midst of a probe/attach 3026 * through a passive path; this 3027 * case is exempt from sense analysis 3028 * for detection of ext. failover 3029 * because that would unnecessarily 3030 * increase attach time. 3031 */ 3032 bcopy(pkt->pkt_scbp, tpkt->pkt_scbp, 3033 vpkt->vpkt_tgt_init_scblen); 3034 break; 3035 } 3036 if (sns->es_add_code == VHCI_SCSI_PERR) { 3037 /* 3038 * parity error 3039 */ 3040 err_str = parity_err; 3041 bcopy(pkt->pkt_scbp, tpkt->pkt_scbp, 3042 vpkt->vpkt_tgt_init_scblen); 3043 break; 3044 } 3045 rval = (*fops->sfo_analyze_sense) 3046 (svp->svp_psd, sns, vlun->svl_fops_ctpriv); 3047 if ((rval == SCSI_SENSE_NOFAILOVER) || 3048 (rval == SCSI_SENSE_UNKNOWN) || 3049 (rval == SCSI_SENSE_NOT_READY)) { 3050 bcopy(pkt->pkt_scbp, tpkt->pkt_scbp, 3051 vpkt->vpkt_tgt_init_scblen); 3052 break; 3053 } else if (rval == SCSI_SENSE_STATE_CHANGED) { 3054 struct scsi_vhci *vhci; 3055 vhci = ADDR2VHCI(&tpkt->pkt_address); 3056 VHCI_HOLD_LUN(vlun, VH_NOSLEEP, held); 3057 if (!held) { 3058 /* 3059 * looks like some other thread 3060 * has already detected this 3061 * condition 3062 */ 3063 tpkt->pkt_state &= 3064 ~STATE_ARQ_DONE; 3065 *(tpkt->pkt_scbp) = 3066 STATUS_BUSY; 3067 break; 3068 } 3069 (void) taskq_dispatch( 3070 vhci->vhci_update_pathstates_taskq, 3071 vhci_update_pathstates, 3072 (void *)vlun, KM_SLEEP); 3073 } else { 3074 /* 3075 * externally initiated failover 3076 * has occurred or is in progress 3077 */ 3078 VHCI_HOLD_LUN(vlun, VH_NOSLEEP, held); 3079 if (!held) { 3080 /* 3081 * looks like some other thread 3082 * has already detected this 3083 * condition 3084 */ 3085 tpkt->pkt_state &= 3086 ~STATE_ARQ_DONE; 3087 *(tpkt->pkt_scbp) = 3088 STATUS_BUSY; 3089 break; 3090 } else { 3091 rval = vhci_handle_ext_fo 3092 (pkt, rval); 3093 if (rval == BUSY_RETURN) { 3094 tpkt->pkt_state &= 3095 ~STATE_ARQ_DONE; 3096 *(tpkt->pkt_scbp) = 3097 STATUS_BUSY; 3098 break; 3099 } 3100 bcopy(pkt->pkt_scbp, 3101 tpkt->pkt_scbp, 3102 vpkt->vpkt_tgt_init_scblen); 3103 break; 3104 } 3105 } 3106 } 3107 break; 3108 3109 /* 3110 * If this is a good SCSI-II RELEASE cmd completion then restore 3111 * the load balancing policy and reset VLUN_RESERVE_ACTIVE_FLG. 3112 * If this is a good SCSI-II RESERVE cmd completion then set 3113 * VLUN_RESERVE_ACTIVE_FLG. 3114 */ 3115 case STATUS_GOOD: 3116 if ((pkt->pkt_cdbp[0] == SCMD_RELEASE) || 3117 (pkt->pkt_cdbp[0] == SCMD_RELEASE_G1)) { 3118 (void) mdi_set_lb_policy(vlun->svl_dip, 3119 vlun->svl_lb_policy_save); 3120 vlun->svl_flags &= ~VLUN_RESERVE_ACTIVE_FLG; 3121 VHCI_DEBUG(1, (CE_WARN, NULL, 3122 "!vhci_intr: vlun 0x%p release path 0x%p", 3123 (void *)vlun, (void *)vpkt->vpkt_path)); 3124 } 3125 3126 if ((pkt->pkt_cdbp[0] == SCMD_RESERVE) || 3127 (pkt->pkt_cdbp[0] == SCMD_RESERVE_G1)) { 3128 vlun->svl_flags |= VLUN_RESERVE_ACTIVE_FLG; 3129 vlun->svl_resrv_pip = vpkt->vpkt_path; 3130 VHCI_DEBUG(1, (CE_WARN, NULL, 3131 "!vhci_intr: vlun 0x%p reserved path 0x%p", 3132 (void *)vlun, (void *)vpkt->vpkt_path)); 3133 } 3134 break; 3135 3136 case STATUS_RESERVATION_CONFLICT: 3137 VHCI_DEBUG(1, (CE_WARN, NULL, 3138 "!vhci_intr: vlun 0x%p " 3139 "reserve conflict on path 0x%p", 3140 (void *)vlun, (void *)vpkt->vpkt_path)); 3141 /* FALLTHROUGH */ 3142 default: 3143 break; 3144 } 3145 3146 /* 3147 * Update I/O completion statistics for the path 3148 */ 3149 mdi_pi_kstat_iosupdate(vpkt->vpkt_path, vpkt->vpkt_tgt_init_bp); 3150 3151 /* 3152 * Command completed successfully, release the dma binding and 3153 * destroy the transport side of the packet. 3154 */ 3155 if ((pkt->pkt_cdbp[0] == SCMD_PROUT) && 3156 (((pkt->pkt_cdbp[1] & 0x1f) == VHCI_PROUT_REGISTER) || 3157 ((pkt->pkt_cdbp[1] & 0x1f) == 3158 VHCI_PROUT_R_AND_IGNORE))) { 3159 if (SCBP_C(pkt) == STATUS_GOOD) { 3160 ASSERT(vlun->svl_taskq); 3161 svp->svp_last_pkt_reason = pkt->pkt_reason; 3162 (void) taskq_dispatch(vlun->svl_taskq, 3163 vhci_run_cmd, pkt, KM_SLEEP); 3164 return; 3165 } 3166 } 3167 if ((SCBP_C(pkt) == STATUS_GOOD) && 3168 (pkt->pkt_cdbp[0] == SCMD_PRIN) && 3169 vpkt->vpkt_tgt_init_bp) { 3170 /* 3171 * If the action (value in byte 1 of the cdb) is zero, 3172 * we're reading keys, and that's the only condition 3173 * where we need to be concerned with filtering keys 3174 * and potential retries. Otherwise, we simply signal 3175 * the semaphore and move on. 3176 */ 3177 if (pkt->pkt_cdbp[1] == 0) { 3178 /* 3179 * If this is the completion of an internal 3180 * retry then we need to make sure that the 3181 * pkt and tpkt pointers are readjusted so 3182 * the calls to scsi_destroy_pkt and pkt_comp 3183 * below work * correctly. 3184 */ 3185 if (vpkt->vpkt_org_vpkt != NULL) { 3186 pkt = vpkt->vpkt_org_vpkt->vpkt_hba_pkt; 3187 tpkt = vpkt->vpkt_org_vpkt-> 3188 vpkt_tgt_pkt; 3189 3190 /* 3191 * If this command was issued through 3192 * the taskq then we need to clear 3193 * this flag for proper processing in 3194 * the case of a retry from the target 3195 * driver. 3196 */ 3197 vpkt->vpkt_state &= 3198 ~VHCI_PKT_THRU_TASKQ; 3199 } 3200 3201 /* 3202 * if vhci_do_prin returns VHCI_CMD_CMPLT then 3203 * vpkt will contain the address of the 3204 * original vpkt 3205 */ 3206 if (vhci_do_prin(&vpkt) == VHCI_CMD_RETRY) { 3207 /* 3208 * The command has been resent to get 3209 * all the keys from the device. Don't 3210 * complete the command with ssd until 3211 * the retry completes. 3212 */ 3213 return; 3214 } 3215 } else { 3216 sema_v(&vlun->svl_pgr_sema); 3217 } 3218 } 3219 3220 break; 3221 3222 case CMD_TIMEOUT: 3223 if ((pkt->pkt_statistics & 3224 (STAT_BUS_RESET|STAT_DEV_RESET|STAT_ABORTED)) == 0) { 3225 3226 VHCI_DEBUG(1, (CE_NOTE, NULL, 3227 "!scsi vhci timeout invoked\n")); 3228 3229 (void) vhci_recovery_reset(vlun, &pkt->pkt_address, 3230 FALSE, VHCI_DEPTH_ALL); 3231 } 3232 MDI_PI_ERRSTAT(lpath, MDI_PI_TRANSERR); 3233 tpkt->pkt_statistics |= STAT_ABORTED; 3234 err_str = timeout_err; 3235 break; 3236 3237 case CMD_TRAN_ERR: 3238 /* 3239 * This status is returned if the transport has sent the cmd 3240 * down the link to the target and then some error occurs. 3241 * In case of SCSI-II RESERVE cmd, we don't know if the 3242 * reservation been accepted by the target or not, so we need 3243 * to clear the reservation. 3244 */ 3245 if ((pkt->pkt_cdbp[0] == SCMD_RESERVE) || 3246 (pkt->pkt_cdbp[0] == SCMD_RESERVE_G1)) { 3247 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_intr received" 3248 " cmd_tran_err for scsi-2 reserve cmd\n")); 3249 if (!vhci_recovery_reset(vlun, &pkt->pkt_address, 3250 TRUE, VHCI_DEPTH_TARGET)) { 3251 VHCI_DEBUG(1, (CE_WARN, NULL, 3252 "!vhci_intr cmd_tran_err reset failed!")); 3253 } 3254 } 3255 break; 3256 3257 case CMD_DEV_GONE: 3258 tpkt->pkt_reason = CMD_CMPLT; 3259 tpkt->pkt_state = STATE_GOT_BUS | 3260 STATE_GOT_TARGET | STATE_SENT_CMD | 3261 STATE_GOT_STATUS; 3262 *(tpkt->pkt_scbp) = STATUS_BUSY; 3263 break; 3264 3265 default: 3266 break; 3267 } 3268 3269 /* 3270 * SCSI-II RESERVE cmd has been serviced by the lower layers clear 3271 * the flag so the lun is not QUIESCED any longer. 3272 * Also clear the VHCI_PKT_THRU_TASKQ flag, to ensure that if this pkt 3273 * is retried, a taskq shall again be dispatched to service it. Else 3274 * it may lead to a system hang if the retry is within interrupt 3275 * context. 3276 */ 3277 if ((pkt->pkt_cdbp[0] == SCMD_RESERVE) || 3278 (pkt->pkt_cdbp[0] == SCMD_RESERVE_G1)) { 3279 vlun->svl_flags &= ~VLUN_QUIESCED_FLG; 3280 vpkt->vpkt_state &= ~VHCI_PKT_THRU_TASKQ; 3281 } 3282 3283 /* 3284 * vpkt_org_vpkt should always be NULL here if the retry command 3285 * has been successfully processed. If vpkt_org_vpkt != NULL at 3286 * this point, it is an error so restore the original vpkt and 3287 * return an error to the target driver so it can retry the 3288 * command as appropriate. 3289 */ 3290 if (vpkt->vpkt_org_vpkt != NULL) { 3291 struct vhci_pkt *new_vpkt = vpkt; 3292 vpkt = vpkt->vpkt_org_vpkt; 3293 3294 vhci_scsi_destroy_pkt(&svp->svp_psd->sd_address, 3295 new_vpkt->vpkt_tgt_pkt); 3296 3297 /* 3298 * Mark this command completion as having an error so that 3299 * ssd will retry the command. 3300 */ 3301 vpkt->vpkt_tgt_pkt->pkt_reason = CMD_ABORTED; 3302 vpkt->vpkt_tgt_pkt->pkt_statistics |= STAT_ABORTED; 3303 3304 pkt = vpkt->vpkt_hba_pkt; 3305 tpkt = vpkt->vpkt_tgt_pkt; 3306 } 3307 3308 if ((err_str != NULL) && (pkt->pkt_reason != 3309 svp->svp_last_pkt_reason)) { 3310 cdip = vlun->svl_dip; 3311 pdip = mdi_pi_get_phci(vpkt->vpkt_path); 3312 vdip = ddi_get_parent(cdip); 3313 cpath = kmem_alloc(MAXPATHLEN, KM_SLEEP); 3314 dpath = kmem_alloc(MAXPATHLEN, KM_SLEEP); 3315 vhci_log(CE_WARN, vdip, "!%s (%s%d): %s on path %s (%s%d)", 3316 ddi_pathname(cdip, cpath), ddi_driver_name(cdip), 3317 ddi_get_instance(cdip), err_str, 3318 ddi_pathname(pdip, dpath), ddi_driver_name(pdip), 3319 ddi_get_instance(pdip)); 3320 kmem_free(cpath, MAXPATHLEN); 3321 kmem_free(dpath, MAXPATHLEN); 3322 } 3323 svp->svp_last_pkt_reason = pkt->pkt_reason; 3324 VHCI_DECR_PATH_CMDCOUNT(svp); 3325 3326 /* 3327 * For PARTIAL_DMA, vhci should not free the path. 3328 * Target driver will call into vhci_scsi_dmafree or 3329 * destroy pkt to release this path. 3330 */ 3331 if ((vpkt->vpkt_flags & CFLAG_DMA_PARTIAL) == 0) { 3332 scsi_destroy_pkt(pkt); 3333 vpkt->vpkt_hba_pkt = NULL; 3334 if (vpkt->vpkt_path) { 3335 mdi_rele_path(vpkt->vpkt_path); 3336 vpkt->vpkt_path = NULL; 3337 } 3338 } 3339 3340 if (tpkt->pkt_comp) { 3341 (*tpkt->pkt_comp)(tpkt); 3342 } 3343 } 3344 3345 /* 3346 * two possibilities: (1) failover has completed 3347 * or (2) is in progress; update our path states for 3348 * the former case; for the latter case, 3349 * initiate a scsi_watch request to 3350 * determine when failover completes - vlun is HELD 3351 * until failover completes; BUSY is returned to upper 3352 * layer in both the cases 3353 */ 3354 static int 3355 vhci_handle_ext_fo(struct scsi_pkt *pkt, int fostat) 3356 { 3357 struct vhci_pkt *vpkt = (struct vhci_pkt *)pkt->pkt_private; 3358 struct scsi_pkt *tpkt; 3359 scsi_vhci_priv_t *svp; 3360 scsi_vhci_lun_t *vlun; 3361 struct scsi_vhci *vhci; 3362 scsi_vhci_swarg_t *swarg; 3363 char *path; 3364 3365 ASSERT(vpkt != NULL); 3366 tpkt = vpkt->vpkt_tgt_pkt; 3367 ASSERT(tpkt != NULL); 3368 svp = (scsi_vhci_priv_t *)mdi_pi_get_vhci_private(vpkt->vpkt_path); 3369 ASSERT(svp != NULL); 3370 vlun = svp->svp_svl; 3371 ASSERT(vlun != NULL); 3372 ASSERT(VHCI_LUN_IS_HELD(vlun)); 3373 3374 vhci = ADDR2VHCI(&tpkt->pkt_address); 3375 3376 if (fostat == SCSI_SENSE_INACTIVE) { 3377 VHCI_DEBUG(1, (CE_NOTE, NULL, "!Failover " 3378 "detected for %s; updating path states...\n", 3379 vlun->svl_lun_wwn)); 3380 /* 3381 * set the vlun flag to indicate to the task that the target 3382 * port group needs updating 3383 */ 3384 vlun->svl_flags |= VLUN_UPDATE_TPG; 3385 (void) taskq_dispatch(vhci->vhci_update_pathstates_taskq, 3386 vhci_update_pathstates, (void *)vlun, KM_SLEEP); 3387 } else { 3388 path = kmem_alloc(MAXPATHLEN, KM_SLEEP); 3389 vhci_log(CE_NOTE, ddi_get_parent(vlun->svl_dip), 3390 "!%s (%s%d): Waiting for externally initiated failover " 3391 "to complete", ddi_pathname(vlun->svl_dip, path), 3392 ddi_driver_name(vlun->svl_dip), 3393 ddi_get_instance(vlun->svl_dip)); 3394 kmem_free(path, MAXPATHLEN); 3395 swarg = kmem_alloc(sizeof (*swarg), KM_NOSLEEP); 3396 if (swarg == NULL) { 3397 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_handle_ext_fo: " 3398 "request packet allocation for %s failed....\n", 3399 vlun->svl_lun_wwn)); 3400 VHCI_RELEASE_LUN(vlun); 3401 return (PKT_RETURN); 3402 } 3403 swarg->svs_svp = svp; 3404 swarg->svs_tos = ddi_get_time(); 3405 swarg->svs_pi = vpkt->vpkt_path; 3406 swarg->svs_release_lun = 0; 3407 swarg->svs_done = 0; 3408 /* 3409 * place a hold on the path...we don't want it to 3410 * vanish while scsi_watch is in progress 3411 */ 3412 mdi_hold_path(vpkt->vpkt_path); 3413 svp->svp_sw_token = scsi_watch_request_submit(svp->svp_psd, 3414 VHCI_FOWATCH_INTERVAL, SENSE_LENGTH, vhci_efo_watch_cb, 3415 (caddr_t)swarg); 3416 } 3417 return (BUSY_RETURN); 3418 } 3419 3420 /* 3421 * vhci_efo_watch_cb: 3422 * Callback from scsi_watch request to check the failover status. 3423 * Completion is either due to successful failover or timeout. 3424 * Upon successful completion, vhci_update_path_states is called. 3425 * For timeout condition, vhci_efo_done is called. 3426 * Always returns 0 to scsi_watch to keep retrying till vhci_efo_done 3427 * terminates this request properly in a separate thread. 3428 */ 3429 3430 static int 3431 vhci_efo_watch_cb(caddr_t arg, struct scsi_watch_result *resultp) 3432 { 3433 struct scsi_status *statusp = resultp->statusp; 3434 struct scsi_extended_sense *sensep = resultp->sensep; 3435 struct scsi_pkt *pkt = resultp->pkt; 3436 scsi_vhci_swarg_t *swarg; 3437 scsi_vhci_priv_t *svp; 3438 scsi_vhci_lun_t *vlun; 3439 struct scsi_vhci *vhci; 3440 dev_info_t *vdip; 3441 int rval, updt_paths; 3442 3443 swarg = (scsi_vhci_swarg_t *)(uintptr_t)arg; 3444 svp = swarg->svs_svp; 3445 if (swarg->svs_done) { 3446 /* 3447 * Already completed failover or timedout. 3448 * Waiting for vhci_efo_done to terminate this scsi_watch. 3449 */ 3450 return (0); 3451 } 3452 3453 ASSERT(svp != NULL); 3454 vlun = svp->svp_svl; 3455 ASSERT(vlun != NULL); 3456 ASSERT(VHCI_LUN_IS_HELD(vlun)); 3457 vlun->svl_efo_update_path = 0; 3458 vdip = ddi_get_parent(vlun->svl_dip); 3459 vhci = ddi_get_soft_state(vhci_softstate, 3460 ddi_get_instance(vdip)); 3461 3462 updt_paths = 0; 3463 3464 if (pkt->pkt_reason != CMD_CMPLT) { 3465 if ((ddi_get_time() - swarg->svs_tos) >= VHCI_EXTFO_TIMEOUT) { 3466 swarg->svs_release_lun = 1; 3467 goto done; 3468 } 3469 return (0); 3470 } 3471 if (*((unsigned char *)statusp) == STATUS_CHECK) { 3472 rval = (*(vlun->svl_fops->sfo_analyze_sense)) 3473 (svp->svp_psd, sensep, vlun->svl_fops_ctpriv); 3474 switch (rval) { 3475 /* 3476 * Only update path states in case path is definitely 3477 * inactive, or no failover occurred. For all other 3478 * check conditions continue pinging. A unexpected 3479 * check condition shouldn't cause pinging to complete 3480 * prematurely. 3481 */ 3482 case SCSI_SENSE_INACTIVE: 3483 case SCSI_SENSE_NOFAILOVER: 3484 updt_paths = 1; 3485 break; 3486 default: 3487 if ((ddi_get_time() - swarg->svs_tos) 3488 >= VHCI_EXTFO_TIMEOUT) { 3489 swarg->svs_release_lun = 1; 3490 goto done; 3491 } 3492 return (0); 3493 } 3494 } else if (*((unsigned char *)statusp) == 3495 STATUS_RESERVATION_CONFLICT) { 3496 updt_paths = 1; 3497 } else if ((*((unsigned char *)statusp)) & 3498 (STATUS_BUSY | STATUS_QFULL)) { 3499 return (0); 3500 } 3501 if ((*((unsigned char *)statusp) == STATUS_GOOD) || 3502 (updt_paths == 1)) { 3503 /* 3504 * we got here because we had detected an 3505 * externally initiated failover; things 3506 * have settled down now, so let's 3507 * start up a task to update the 3508 * path states and target port group 3509 */ 3510 vlun->svl_efo_update_path = 1; 3511 swarg->svs_done = 1; 3512 vlun->svl_swarg = swarg; 3513 vlun->svl_flags |= VLUN_UPDATE_TPG; 3514 (void) taskq_dispatch(vhci->vhci_update_pathstates_taskq, 3515 vhci_update_pathstates, (void *)vlun, 3516 KM_SLEEP); 3517 return (0); 3518 } 3519 if ((ddi_get_time() - swarg->svs_tos) >= VHCI_EXTFO_TIMEOUT) { 3520 swarg->svs_release_lun = 1; 3521 goto done; 3522 } 3523 return (0); 3524 done: 3525 swarg->svs_done = 1; 3526 (void) taskq_dispatch(vhci->vhci_taskq, 3527 vhci_efo_done, (void *)swarg, KM_SLEEP); 3528 return (0); 3529 } 3530 3531 /* 3532 * vhci_efo_done: 3533 * cleanly terminates scsi_watch and free up resources. 3534 * Called as taskq function in vhci_efo_watch_cb for EFO timeout condition 3535 * or by vhci_update_path_states invoked during external initiated 3536 * failover completion. 3537 */ 3538 static void 3539 vhci_efo_done(void *arg) 3540 { 3541 scsi_vhci_lun_t *vlun; 3542 scsi_vhci_swarg_t *swarg = (scsi_vhci_swarg_t *)arg; 3543 scsi_vhci_priv_t *svp = swarg->svs_svp; 3544 ASSERT(svp); 3545 3546 vlun = svp->svp_svl; 3547 ASSERT(vlun); 3548 3549 /* Wait for clean termination of scsi_watch */ 3550 (void) scsi_watch_request_terminate(svp->svp_sw_token, 3551 SCSI_WATCH_TERMINATE_WAIT); 3552 svp->svp_sw_token = NULL; 3553 3554 /* release path and freeup resources to indicate failover completion */ 3555 mdi_rele_path(swarg->svs_pi); 3556 if (swarg->svs_release_lun) { 3557 VHCI_RELEASE_LUN(vlun); 3558 } 3559 kmem_free((void *)swarg, sizeof (*swarg)); 3560 } 3561 3562 /* 3563 * Update the path states 3564 * vlun should be HELD when this is invoked. 3565 * Calls vhci_efo_done to cleanup resources allocated for EFO. 3566 */ 3567 void 3568 vhci_update_pathstates(void *arg) 3569 { 3570 mdi_pathinfo_t *pip, *npip; 3571 dev_info_t *dip, *pdip; 3572 struct scsi_failover_ops *fo; 3573 struct scsi_vhci_priv *svp; 3574 struct scsi_device *psd; 3575 struct scsi_path_opinfo opinfo; 3576 char *pclass, *tptr; 3577 struct scsi_vhci_lun *vlun = (struct scsi_vhci_lun *)arg; 3578 int sps; /* mdi_select_path() status */ 3579 char *cpath, *dpath; 3580 struct scsi_vhci *vhci; 3581 struct scsi_pkt *pkt; 3582 struct buf *bp; 3583 int reserve_conflict = 0; 3584 3585 ASSERT(VHCI_LUN_IS_HELD(vlun)); 3586 dip = vlun->svl_dip; 3587 pip = npip = NULL; 3588 3589 vhci = ddi_get_soft_state(vhci_softstate, 3590 ddi_get_instance(ddi_get_parent(dip))); 3591 3592 sps = mdi_select_path(dip, NULL, (MDI_SELECT_ONLINE_PATH | 3593 MDI_SELECT_STANDBY_PATH), NULL, &npip); 3594 if ((npip == NULL) || (sps != MDI_SUCCESS)) { 3595 goto done; 3596 } 3597 3598 fo = vlun->svl_fops; 3599 do { 3600 pip = npip; 3601 svp = (scsi_vhci_priv_t *)mdi_pi_get_vhci_private(pip); 3602 psd = svp->svp_psd; 3603 if ((*fo->sfo_path_get_opinfo)(psd, &opinfo, 3604 vlun->svl_fops_ctpriv) != 0) { 3605 sps = mdi_select_path(dip, NULL, 3606 (MDI_SELECT_ONLINE_PATH | MDI_SELECT_STANDBY_PATH), 3607 pip, &npip); 3608 mdi_rele_path(pip); 3609 continue; 3610 } 3611 3612 if (mdi_prop_lookup_string(pip, "path-class", &pclass) != 3613 MDI_SUCCESS) { 3614 VHCI_DEBUG(1, (CE_NOTE, NULL, 3615 "!vhci_update_pathstates: prop lookup failed for " 3616 "path 0x%p\n", (void *)pip)); 3617 sps = mdi_select_path(dip, NULL, 3618 (MDI_SELECT_ONLINE_PATH | MDI_SELECT_STANDBY_PATH), 3619 pip, &npip); 3620 mdi_rele_path(pip); 3621 continue; 3622 } 3623 3624 /* 3625 * Need to update the "path-class" property 3626 * value in the device tree if different 3627 * from the existing value. 3628 */ 3629 if (strcmp(pclass, opinfo.opinfo_path_attr) != 0) { 3630 (void) mdi_prop_update_string(pip, "path-class", 3631 opinfo.opinfo_path_attr); 3632 } 3633 3634 /* 3635 * Only change the state if needed. i.e. Don't call 3636 * mdi_pi_set_state to ONLINE a path if its already 3637 * ONLINE. Same for STANDBY paths. 3638 */ 3639 3640 if ((opinfo.opinfo_path_state == SCSI_PATH_ACTIVE || 3641 opinfo.opinfo_path_state == SCSI_PATH_ACTIVE_NONOPT)) { 3642 if (!(MDI_PI_IS_ONLINE(pip))) { 3643 VHCI_DEBUG(1, (CE_NOTE, NULL, 3644 "!vhci_update_pathstates: marking path" 3645 " 0x%p as ONLINE\n", (void *)pip)); 3646 pdip = mdi_pi_get_phci(pip); 3647 cpath = kmem_alloc(MAXPATHLEN, KM_SLEEP); 3648 dpath = kmem_alloc(MAXPATHLEN, KM_SLEEP); 3649 vhci_log(CE_NOTE, ddi_get_parent(dip), "!%s" 3650 " (%s%d): path %s (%s%d) target address %s" 3651 " is now ONLINE because of" 3652 " an externally initiated failover", 3653 ddi_pathname(dip, cpath), 3654 ddi_driver_name(dip), 3655 ddi_get_instance(dip), 3656 ddi_pathname(pdip, dpath), 3657 ddi_driver_name(pdip), 3658 ddi_get_instance(pdip), 3659 mdi_pi_get_addr(pip)); 3660 kmem_free(cpath, MAXPATHLEN); 3661 kmem_free(dpath, MAXPATHLEN); 3662 mdi_pi_set_state(pip, 3663 MDI_PATHINFO_STATE_ONLINE); 3664 mdi_pi_set_preferred(pip, 3665 opinfo.opinfo_preferred); 3666 tptr = kmem_alloc(strlen 3667 (opinfo.opinfo_path_attr)+1, KM_SLEEP); 3668 (void) strlcpy(tptr, opinfo.opinfo_path_attr, 3669 (strlen(opinfo.opinfo_path_attr)+1)); 3670 mutex_enter(&vlun->svl_mutex); 3671 if (vlun->svl_active_pclass != NULL) { 3672 kmem_free(vlun->svl_active_pclass, 3673 strlen(vlun->svl_active_pclass)+1); 3674 } 3675 vlun->svl_active_pclass = tptr; 3676 if (vlun->svl_waiting_for_activepath) { 3677 vlun->svl_waiting_for_activepath = 0; 3678 } 3679 mutex_exit(&vlun->svl_mutex); 3680 /* Check for Reservation Conflict */ 3681 bp = scsi_alloc_consistent_buf( 3682 &svp->svp_psd->sd_address, 3683 (struct buf *)NULL, DEV_BSIZE, B_READ, 3684 NULL, NULL); 3685 if (!bp) { 3686 VHCI_DEBUG(1, (CE_NOTE, NULL, 3687 "vhci_update_pathstates: " 3688 "!No resources (buf)\n")); 3689 mdi_rele_path(pip); 3690 goto done; 3691 } 3692 pkt = scsi_init_pkt(&svp->svp_psd->sd_address, 3693 NULL, bp, CDB_GROUP1, 3694 sizeof (struct scsi_arq_status), 0, 3695 PKT_CONSISTENT, NULL, NULL); 3696 if (pkt) { 3697 (void) scsi_setup_cdb((union scsi_cdb *) 3698 (uintptr_t)pkt->pkt_cdbp, 3699 SCMD_READ, 1, 1, 0); 3700 pkt->pkt_time = 3*30; 3701 pkt->pkt_flags = FLAG_NOINTR; 3702 if ((scsi_transport(pkt) == 3703 TRAN_ACCEPT) && (pkt->pkt_reason 3704 == CMD_CMPLT) && (SCBP_C(pkt) == 3705 STATUS_RESERVATION_CONFLICT)) { 3706 reserve_conflict = 1; 3707 } 3708 scsi_destroy_pkt(pkt); 3709 } 3710 scsi_free_consistent_buf(bp); 3711 } else if (MDI_PI_IS_ONLINE(pip)) { 3712 if (strcmp(pclass, opinfo.opinfo_path_attr) 3713 != 0) { 3714 mdi_pi_set_preferred(pip, 3715 opinfo.opinfo_preferred); 3716 mutex_enter(&vlun->svl_mutex); 3717 if (vlun->svl_active_pclass == NULL || 3718 strcmp(opinfo.opinfo_path_attr, 3719 vlun->svl_active_pclass) != 0) { 3720 mutex_exit(&vlun->svl_mutex); 3721 tptr = kmem_alloc(strlen 3722 (opinfo.opinfo_path_attr)+1, 3723 KM_SLEEP); 3724 (void) strlcpy(tptr, 3725 opinfo.opinfo_path_attr, 3726 (strlen 3727 (opinfo.opinfo_path_attr) 3728 +1)); 3729 mutex_enter(&vlun->svl_mutex); 3730 } else { 3731 /* 3732 * No need to update 3733 * svl_active_pclass 3734 */ 3735 tptr = NULL; 3736 mutex_exit(&vlun->svl_mutex); 3737 } 3738 if (tptr) { 3739 if (vlun->svl_active_pclass 3740 != NULL) { 3741 kmem_free(vlun-> 3742 svl_active_pclass, 3743 strlen(vlun-> 3744 svl_active_pclass) 3745 +1); 3746 } 3747 vlun->svl_active_pclass = tptr; 3748 mutex_exit(&vlun->svl_mutex); 3749 } 3750 } 3751 } 3752 } else if ((opinfo.opinfo_path_state == SCSI_PATH_INACTIVE) && 3753 !(MDI_PI_IS_STANDBY(pip))) { 3754 VHCI_DEBUG(1, (CE_NOTE, NULL, 3755 "!vhci_update_pathstates: marking path" 3756 " 0x%p as STANDBY\n", (void *)pip)); 3757 pdip = mdi_pi_get_phci(pip); 3758 cpath = kmem_alloc(MAXPATHLEN, KM_SLEEP); 3759 dpath = kmem_alloc(MAXPATHLEN, KM_SLEEP); 3760 vhci_log(CE_NOTE, ddi_get_parent(dip), "!%s" 3761 " (%s%d): path %s (%s%d) target address %s" 3762 " is now STANDBY because of" 3763 " an externally initiated failover", 3764 ddi_pathname(dip, cpath), 3765 ddi_driver_name(dip), 3766 ddi_get_instance(dip), 3767 ddi_pathname(pdip, dpath), 3768 ddi_driver_name(pdip), 3769 ddi_get_instance(pdip), 3770 mdi_pi_get_addr(pip)); 3771 kmem_free(cpath, MAXPATHLEN); 3772 kmem_free(dpath, MAXPATHLEN); 3773 mdi_pi_set_state(pip, 3774 MDI_PATHINFO_STATE_STANDBY); 3775 mdi_pi_set_preferred(pip, 3776 opinfo.opinfo_preferred); 3777 mutex_enter(&vlun->svl_mutex); 3778 if (vlun->svl_active_pclass != NULL) { 3779 if (strcmp(vlun->svl_active_pclass, 3780 opinfo.opinfo_path_attr) == 0) { 3781 kmem_free(vlun-> 3782 svl_active_pclass, 3783 strlen(vlun-> 3784 svl_active_pclass)+1); 3785 vlun->svl_active_pclass = NULL; 3786 } 3787 } 3788 mutex_exit(&vlun->svl_mutex); 3789 } 3790 (void) mdi_prop_free(pclass); 3791 sps = mdi_select_path(dip, NULL, 3792 (MDI_SELECT_ONLINE_PATH | MDI_SELECT_STANDBY_PATH), 3793 pip, &npip); 3794 mdi_rele_path(pip); 3795 3796 } while ((npip != NULL) && (sps == MDI_SUCCESS)); 3797 3798 /* 3799 * Check to see if this vlun has an active SCSI-II RESERVE. If so 3800 * clear the reservation by sending a reset, so the host doesn't 3801 * receive a reservation conflict. 3802 * Reset VLUN_RESERVE_ACTIVE_FLG for this vlun. Also notify ssd 3803 * of the reset, explicitly. 3804 */ 3805 if (vlun->svl_flags & VLUN_RESERVE_ACTIVE_FLG) { 3806 if (reserve_conflict && (vlun->svl_xlf_capable == 0)) { 3807 (void) vhci_recovery_reset(vlun, 3808 &svp->svp_psd->sd_address, FALSE, 3809 VHCI_DEPTH_TARGET); 3810 } 3811 vlun->svl_flags &= ~VLUN_RESERVE_ACTIVE_FLG; 3812 mutex_enter(&vhci->vhci_mutex); 3813 scsi_hba_reset_notify_callback(&vhci->vhci_mutex, 3814 &vhci->vhci_reset_notify_listf); 3815 mutex_exit(&vhci->vhci_mutex); 3816 } 3817 if (vlun->svl_flags & VLUN_UPDATE_TPG) { 3818 /* 3819 * Update the AccessState of related MP-API TPGs 3820 */ 3821 (void) vhci_mpapi_update_tpg_acc_state_for_lu(vhci, vlun); 3822 vlun->svl_flags &= ~VLUN_UPDATE_TPG; 3823 } 3824 done: 3825 if (vlun->svl_efo_update_path) { 3826 vlun->svl_efo_update_path = 0; 3827 vhci_efo_done(vlun->svl_swarg); 3828 vlun->svl_swarg = 0; 3829 } 3830 VHCI_RELEASE_LUN(vlun); 3831 } 3832 3833 /* ARGSUSED */ 3834 static int 3835 vhci_pathinfo_init(dev_info_t *vdip, mdi_pathinfo_t *pip, int flags) 3836 { 3837 scsi_hba_tran_t *hba = NULL; 3838 struct scsi_device *psd = NULL; 3839 scsi_vhci_lun_t *vlun = NULL; 3840 dev_info_t *pdip = NULL; 3841 dev_info_t *tgt_dip; 3842 struct scsi_vhci *vhci; 3843 char *guid; 3844 scsi_vhci_priv_t *svp = NULL; 3845 int rval = MDI_FAILURE; 3846 int vlun_alloced = 0; 3847 3848 ASSERT(vdip != NULL); 3849 ASSERT(pip != NULL); 3850 3851 vhci = ddi_get_soft_state(vhci_softstate, ddi_get_instance(vdip)); 3852 ASSERT(vhci != NULL); 3853 3854 pdip = mdi_pi_get_phci(pip); 3855 ASSERT(pdip != NULL); 3856 3857 hba = ddi_get_driver_private(pdip); 3858 ASSERT(hba != NULL); 3859 3860 tgt_dip = mdi_pi_get_client(pip); 3861 ASSERT(tgt_dip != NULL); 3862 3863 if (ddi_prop_lookup_string(DDI_DEV_T_ANY, tgt_dip, PROPFLAGS, 3864 MDI_CLIENT_GUID_PROP, &guid) != DDI_SUCCESS) { 3865 VHCI_DEBUG(1, (CE_WARN, NULL, 3866 "vhci_pathinfo_init: lun guid property failed")); 3867 goto failure; 3868 } 3869 3870 vlun = vhci_lun_lookup_alloc(tgt_dip, guid, &vlun_alloced); 3871 ddi_prop_free(guid); 3872 3873 vlun->svl_dip = tgt_dip; 3874 3875 svp = kmem_zalloc(sizeof (*svp), KM_SLEEP); 3876 svp->svp_svl = vlun; 3877 3878 vlun->svl_lb_policy_save = mdi_get_lb_policy(tgt_dip); 3879 mutex_init(&svp->svp_mutex, NULL, MUTEX_DRIVER, NULL); 3880 cv_init(&svp->svp_cv, NULL, CV_DRIVER, NULL); 3881 3882 psd = kmem_zalloc(sizeof (*psd), KM_SLEEP); 3883 mutex_init(&psd->sd_mutex, NULL, MUTEX_DRIVER, NULL); 3884 3885 /* 3886 * Clone transport structure if requested, so 3887 * Self enumerating HBAs always need to use cloning 3888 */ 3889 3890 if (hba->tran_hba_flags & SCSI_HBA_TRAN_CLONE) { 3891 scsi_hba_tran_t *clone = 3892 kmem_alloc(sizeof (scsi_hba_tran_t), KM_SLEEP); 3893 bcopy(hba, clone, sizeof (scsi_hba_tran_t)); 3894 hba = clone; 3895 hba->tran_sd = psd; 3896 } else { 3897 ASSERT(hba->tran_sd == NULL); 3898 } 3899 psd->sd_dev = tgt_dip; 3900 psd->sd_address.a_hba_tran = hba; 3901 psd->sd_private = (caddr_t)pip; 3902 svp->svp_psd = psd; 3903 mdi_pi_set_vhci_private(pip, (caddr_t)svp); 3904 3905 /* 3906 * call hba's target init entry point if it exists 3907 */ 3908 if (hba->tran_tgt_init != NULL) { 3909 if ((rval = (*hba->tran_tgt_init)(pdip, tgt_dip, 3910 hba, psd)) != DDI_SUCCESS) { 3911 VHCI_DEBUG(1, (CE_WARN, pdip, 3912 "!vhci_pathinfo_init: tran_tgt_init failed for " 3913 "path=0x%p rval=%x", (void *)pip, rval)); 3914 goto failure; 3915 } 3916 } 3917 3918 svp->svp_new_path = 1; 3919 3920 psd->sd_inq = NULL; 3921 3922 VHCI_DEBUG(4, (CE_NOTE, NULL, "!vhci_pathinfo_init: path:%p\n", 3923 (void *)pip)); 3924 return (MDI_SUCCESS); 3925 3926 failure: 3927 if (psd) { 3928 mutex_destroy(&psd->sd_mutex); 3929 kmem_free(psd, sizeof (*psd)); 3930 } 3931 if (svp) { 3932 mdi_pi_set_vhci_private(pip, NULL); 3933 mutex_destroy(&svp->svp_mutex); 3934 cv_destroy(&svp->svp_cv); 3935 kmem_free(svp, sizeof (*svp)); 3936 } 3937 if (hba && hba->tran_hba_flags & SCSI_HBA_TRAN_CLONE) 3938 kmem_free(hba, sizeof (scsi_hba_tran_t)); 3939 3940 if (vlun_alloced) 3941 vhci_lun_free(tgt_dip); 3942 3943 return (rval); 3944 } 3945 3946 /* ARGSUSED */ 3947 static int 3948 vhci_pathinfo_uninit(dev_info_t *vdip, mdi_pathinfo_t *pip, int flags) 3949 { 3950 scsi_hba_tran_t *hba = NULL; 3951 struct scsi_device *psd = NULL; 3952 dev_info_t *pdip = NULL; 3953 dev_info_t *cdip = NULL; 3954 scsi_vhci_priv_t *svp = NULL; 3955 3956 ASSERT(vdip != NULL); 3957 ASSERT(pip != NULL); 3958 3959 pdip = mdi_pi_get_phci(pip); 3960 ASSERT(pdip != NULL); 3961 3962 cdip = mdi_pi_get_client(pip); 3963 ASSERT(cdip != NULL); 3964 3965 hba = ddi_get_driver_private(pdip); 3966 ASSERT(hba != NULL); 3967 3968 vhci_mpapi_set_path_state(vdip, pip, MP_DRVR_PATH_STATE_REMOVED); 3969 svp = (scsi_vhci_priv_t *)mdi_pi_get_vhci_private(pip); 3970 if (svp == NULL) { 3971 /* path already freed. Nothing to do. */ 3972 return (MDI_SUCCESS); 3973 } 3974 3975 psd = svp->svp_psd; 3976 ASSERT(psd != NULL); 3977 3978 if (hba->tran_hba_flags & SCSI_HBA_TRAN_CLONE) { 3979 hba = psd->sd_address.a_hba_tran; 3980 ASSERT(hba->tran_hba_flags & SCSI_HBA_TRAN_CLONE); 3981 ASSERT(hba->tran_sd == psd); 3982 } else { 3983 ASSERT(hba->tran_sd == NULL); 3984 } 3985 3986 if (hba->tran_tgt_free != NULL) { 3987 (*hba->tran_tgt_free) (pdip, cdip, hba, psd); 3988 } 3989 mutex_destroy(&psd->sd_mutex); 3990 if (hba->tran_hba_flags & SCSI_HBA_TRAN_CLONE) { 3991 kmem_free(hba, sizeof (*hba)); 3992 } 3993 3994 mdi_pi_set_vhci_private(pip, NULL); 3995 kmem_free((caddr_t)psd, sizeof (*psd)); 3996 3997 mutex_destroy(&svp->svp_mutex); 3998 cv_destroy(&svp->svp_cv); 3999 kmem_free((caddr_t)svp, sizeof (*svp)); 4000 4001 /* 4002 * If this is the last path to the client, 4003 * then free up the vlun as well. 4004 */ 4005 if (mdi_client_get_path_count(cdip) == 1) { 4006 vhci_lun_free(cdip); 4007 } 4008 4009 VHCI_DEBUG(4, (CE_NOTE, NULL, "!vhci_pathinfo_uninit: path=0x%p\n", 4010 (void *)pip)); 4011 return (MDI_SUCCESS); 4012 } 4013 4014 /* ARGSUSED */ 4015 static int 4016 vhci_pathinfo_state_change(dev_info_t *vdip, mdi_pathinfo_t *pip, 4017 mdi_pathinfo_state_t state, uint32_t ext_state, int flags) 4018 { 4019 int rval = MDI_SUCCESS; 4020 scsi_vhci_priv_t *svp; 4021 scsi_vhci_lun_t *vlun; 4022 int held; 4023 int op = (flags & 0xf00) >> 8; 4024 struct scsi_vhci *vhci; 4025 4026 vhci = ddi_get_soft_state(vhci_softstate, ddi_get_instance(vdip)); 4027 4028 if (flags & MDI_EXT_STATE_CHANGE) { 4029 /* 4030 * We do not want to issue any commands down the path in case 4031 * sync flag is set. Lower layers might not be ready to accept 4032 * any I/O commands. 4033 */ 4034 if (op == DRIVER_DISABLE) 4035 return (MDI_SUCCESS); 4036 4037 svp = (scsi_vhci_priv_t *)mdi_pi_get_vhci_private(pip); 4038 if (svp == NULL) { 4039 return (MDI_FAILURE); 4040 } 4041 vlun = svp->svp_svl; 4042 4043 if (flags & MDI_BEFORE_STATE_CHANGE) { 4044 /* 4045 * Hold the LUN. 4046 */ 4047 VHCI_HOLD_LUN(vlun, VH_SLEEP, held); 4048 if (flags & MDI_DISABLE_OP) { 4049 /* 4050 * Issue scsi reset if it happens to be 4051 * reserved path. 4052 */ 4053 if (vlun->svl_flags & VLUN_RESERVE_ACTIVE_FLG) { 4054 /* 4055 * if reservation pending on 4056 * this path, dont' mark the 4057 * path busy 4058 */ 4059 if (op == DRIVER_DISABLE_TRANSIENT) { 4060 VHCI_DEBUG(1, (CE_NOTE, NULL, 4061 "!vhci_pathinfo" 4062 "_state_change (pip:%p): " 4063 " reservation: fail busy\n", 4064 (void *)pip)); 4065 return (MDI_FAILURE); 4066 } 4067 if (pip == vlun->svl_resrv_pip) { 4068 if (vhci_recovery_reset( 4069 svp->svp_svl, 4070 &svp->svp_psd->sd_address, 4071 TRUE, 4072 VHCI_DEPTH_TARGET) == 0) { 4073 VHCI_DEBUG(1, 4074 (CE_NOTE, NULL, 4075 "!vhci_pathinfo" 4076 "_state_change " 4077 " (pip:%p): " 4078 "reset failed, " 4079 "give up!\n", 4080 (void *)pip)); 4081 } 4082 vlun->svl_flags &= 4083 ~VLUN_RESERVE_ACTIVE_FLG; 4084 } 4085 } 4086 } else if (flags & MDI_ENABLE_OP) { 4087 if (((vhci->vhci_conf_flags & 4088 VHCI_CONF_FLAGS_AUTO_FAILBACK) == 4089 VHCI_CONF_FLAGS_AUTO_FAILBACK) && 4090 MDI_PI_IS_USER_DISABLE(pip) && 4091 MDI_PI_IS_STANDBY(pip)) { 4092 struct scsi_failover_ops *fo; 4093 char *best_pclass, *pclass = NULL; 4094 int best_class, rv; 4095 /* 4096 * Failback if enabling a standby path 4097 * and it is the primary class or 4098 * preferred class 4099 */ 4100 best_class = mdi_pi_get_preferred(pip); 4101 if (best_class == 0) { 4102 /* 4103 * if not preferred - compare 4104 * path-class with class 4105 */ 4106 fo = vlun->svl_fops; 4107 (*fo->sfo_pathclass_next)(NULL, 4108 &best_pclass, 4109 vlun->svl_fops_ctpriv); 4110 pclass = NULL; 4111 rv = mdi_prop_lookup_string(pip, 4112 "path-class", &pclass); 4113 if (rv != MDI_SUCCESS || 4114 pclass == NULL) { 4115 vhci_log(CE_NOTE, vdip, 4116 "!path-class " 4117 " lookup " 4118 "failed. rv: %d" 4119 "class: %p", rv, 4120 (void *)pclass); 4121 } else if (strncmp(pclass, 4122 best_pclass, 4123 strlen(best_pclass)) == 0) { 4124 best_class = 1; 4125 } 4126 if (rv == MDI_SUCCESS && 4127 pclass != NULL) { 4128 rv = mdi_prop_free( 4129 pclass); 4130 if (rv != 4131 DDI_PROP_SUCCESS) { 4132 vhci_log( 4133 CE_NOTE, 4134 vdip, 4135 "!path-" 4136 "class" 4137 " free" 4138 " failed" 4139 " rv: %d" 4140 " class: " 4141 "%p", 4142 rv, 4143 (void *) 4144 pclass); 4145 } 4146 } 4147 } 4148 if (best_class == 1) { 4149 VHCI_DEBUG(1, (CE_NOTE, NULL, 4150 "preferred path: %p " 4151 "USER_DISABLE->USER_ENABLE " 4152 "transition for lun %s\n", 4153 (void *)pip, 4154 vlun->svl_lun_wwn)); 4155 (void) taskq_dispatch( 4156 vhci->vhci_taskq, 4157 vhci_initiate_auto_failback, 4158 (void *) vlun, KM_SLEEP); 4159 } 4160 } 4161 /* 4162 * if PGR is active, revalidate key and 4163 * register on this path also, if key is 4164 * still valid 4165 */ 4166 sema_p(&vlun->svl_pgr_sema); 4167 if (vlun->svl_pgr_active) 4168 (void) 4169 vhci_pgr_validate_and_register(svp); 4170 sema_v(&vlun->svl_pgr_sema); 4171 /* 4172 * Inform target driver about any 4173 * reservations to be reinstated if target 4174 * has dropped reservation during the busy 4175 * period. 4176 */ 4177 mutex_enter(&vhci->vhci_mutex); 4178 scsi_hba_reset_notify_callback( 4179 &vhci->vhci_mutex, 4180 &vhci->vhci_reset_notify_listf); 4181 mutex_exit(&vhci->vhci_mutex); 4182 } 4183 } 4184 if (flags & MDI_AFTER_STATE_CHANGE) { 4185 if (flags & MDI_ENABLE_OP) { 4186 mutex_enter(&vhci_global_mutex); 4187 cv_broadcast(&vhci_cv); 4188 mutex_exit(&vhci_global_mutex); 4189 } 4190 if (vlun->svl_setcap_done) { 4191 (void) vhci_pHCI_cap(&svp->svp_psd->sd_address, 4192 "sector-size", vlun->svl_sector_size, 4193 1, pip); 4194 } 4195 4196 /* 4197 * Release the LUN 4198 */ 4199 VHCI_RELEASE_LUN(vlun); 4200 4201 /* 4202 * Path transition is complete. 4203 * Run callback to indicate target driver to 4204 * retry to prevent IO starvation. 4205 */ 4206 if (scsi_callback_id != 0) { 4207 ddi_run_callback(&scsi_callback_id); 4208 } 4209 } 4210 } else { 4211 switch (state) { 4212 case MDI_PATHINFO_STATE_ONLINE: 4213 rval = vhci_pathinfo_online(vdip, pip, flags); 4214 break; 4215 4216 case MDI_PATHINFO_STATE_OFFLINE: 4217 rval = vhci_pathinfo_offline(vdip, pip, flags); 4218 break; 4219 4220 default: 4221 break; 4222 } 4223 /* 4224 * Path transition is complete. 4225 * Run callback to indicate target driver to 4226 * retry to prevent IO starvation. 4227 */ 4228 if ((rval == MDI_SUCCESS) && (scsi_callback_id != 0)) { 4229 ddi_run_callback(&scsi_callback_id); 4230 } 4231 return (rval); 4232 } 4233 4234 return (MDI_SUCCESS); 4235 } 4236 4237 /* 4238 * Parse the mpxio load balancing options. The datanameptr 4239 * will point to a string containing the load-balance-options value. 4240 * The load-balance-options value will be a property that 4241 * defines the load-balance algorithm and any arguments to that 4242 * algorithm. 4243 * For example: 4244 * device-type-mpxio-options-list= 4245 * "device-type=SUN SENA", "load-balance-options=logical-block-options" 4246 * "device-type=SUN SE6920", "round-robin-options"; 4247 * logical-block-options="load-balance=logical-block", "region-size=15"; 4248 * round-robin-options="load-balance=round-robin"; 4249 * 4250 * If the load-balance is not defined the load balance algorithm will 4251 * default to the global setting. There will be default values assigned 4252 * to the arguments (region-size=18) and if an argument is one 4253 * that is not known, it will be ignored. 4254 */ 4255 static void 4256 vhci_parse_mpxio_lb_options(dev_info_t *dip, dev_info_t *cdip, 4257 caddr_t datanameptr) 4258 { 4259 char *dataptr, *next_entry; 4260 caddr_t config_list = NULL; 4261 int config_list_len = 0, list_len = 0; 4262 int region_size = -1; 4263 client_lb_t load_balance; 4264 4265 if (ddi_getlongprop(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, datanameptr, 4266 (caddr_t)&config_list, &config_list_len) != DDI_PROP_SUCCESS) { 4267 return; 4268 } 4269 4270 list_len = config_list_len; 4271 next_entry = config_list; 4272 while (config_list_len > 0) { 4273 dataptr = next_entry; 4274 4275 if (strncmp(mdi_load_balance, dataptr, 4276 strlen(mdi_load_balance)) == 0) { 4277 /* get the load-balance scheme */ 4278 dataptr += strlen(mdi_load_balance) + 1; 4279 if (strcmp(dataptr, LOAD_BALANCE_PROP_RR) == 0) { 4280 (void) mdi_set_lb_policy(cdip, LOAD_BALANCE_RR); 4281 load_balance = LOAD_BALANCE_RR; 4282 } else if (strcmp(dataptr, 4283 LOAD_BALANCE_PROP_LBA) == 0) { 4284 (void) mdi_set_lb_policy(cdip, 4285 LOAD_BALANCE_LBA); 4286 load_balance = LOAD_BALANCE_LBA; 4287 } else if (strcmp(dataptr, 4288 LOAD_BALANCE_PROP_NONE) == 0) { 4289 (void) mdi_set_lb_policy(cdip, 4290 LOAD_BALANCE_NONE); 4291 load_balance = LOAD_BALANCE_NONE; 4292 } 4293 } else if (strncmp(dataptr, LOGICAL_BLOCK_REGION_SIZE, 4294 strlen(LOGICAL_BLOCK_REGION_SIZE)) == 0) { 4295 int i = 0; 4296 char *ptr; 4297 char *tmp; 4298 4299 tmp = dataptr + (strlen(LOGICAL_BLOCK_REGION_SIZE) + 1); 4300 /* check for numeric value */ 4301 for (ptr = tmp; i < strlen(tmp); i++, ptr++) { 4302 if (!isdigit(*ptr)) { 4303 cmn_err(CE_WARN, 4304 "Illegal region size: %s." 4305 " Setting to default value: %d", 4306 tmp, 4307 LOAD_BALANCE_DEFAULT_REGION_SIZE); 4308 region_size = 4309 LOAD_BALANCE_DEFAULT_REGION_SIZE; 4310 break; 4311 } 4312 } 4313 if (i >= strlen(tmp)) { 4314 region_size = stoi(&tmp); 4315 } 4316 (void) mdi_set_lb_region_size(cdip, region_size); 4317 } 4318 config_list_len -= (strlen(next_entry) + 1); 4319 next_entry += strlen(next_entry) + 1; 4320 } 4321 #ifdef DEBUG 4322 if ((region_size >= 0) && (load_balance != LOAD_BALANCE_LBA)) { 4323 VHCI_DEBUG(1, (CE_NOTE, dip, 4324 "!vhci_parse_mpxio_lb_options: region-size: %d" 4325 "only valid for load-balance=logical-block\n", 4326 region_size)); 4327 } 4328 #endif 4329 if ((region_size == -1) && (load_balance == LOAD_BALANCE_LBA)) { 4330 VHCI_DEBUG(1, (CE_NOTE, dip, 4331 "!vhci_parse_mpxio_lb_options: No region-size" 4332 " defined load-balance=logical-block." 4333 " Default to: %d\n", LOAD_BALANCE_DEFAULT_REGION_SIZE)); 4334 (void) mdi_set_lb_region_size(cdip, 4335 LOAD_BALANCE_DEFAULT_REGION_SIZE); 4336 } 4337 if (list_len > 0) { 4338 kmem_free(config_list, list_len); 4339 } 4340 } 4341 4342 /* 4343 * Parse the device-type-mpxio-options-list looking for the key of 4344 * "load-balance-options". If found, parse the load balancing options. 4345 * Check the comment of the vhci_get_device_type_mpxio_options() 4346 * for the device-type-mpxio-options-list. 4347 */ 4348 static void 4349 vhci_parse_mpxio_options(dev_info_t *dip, dev_info_t *cdip, 4350 caddr_t datanameptr, int list_len) 4351 { 4352 char *dataptr; 4353 int len; 4354 4355 /* 4356 * get the data list 4357 */ 4358 dataptr = datanameptr; 4359 len = 0; 4360 while (len < list_len && 4361 strncmp(dataptr, DEVICE_TYPE_STR, strlen(DEVICE_TYPE_STR)) 4362 != 0) { 4363 if (strncmp(dataptr, LOAD_BALANCE_OPTIONS, 4364 strlen(LOAD_BALANCE_OPTIONS)) == 0) { 4365 len += strlen(LOAD_BALANCE_OPTIONS) + 1; 4366 dataptr += strlen(LOAD_BALANCE_OPTIONS) + 1; 4367 vhci_parse_mpxio_lb_options(dip, cdip, dataptr); 4368 } 4369 len += strlen(dataptr) + 1; 4370 dataptr += strlen(dataptr) + 1; 4371 } 4372 } 4373 4374 /* 4375 * Check the inquriy string returned from the device wiith the device-type 4376 * Check for the existence of the device-type-mpxio-options-list and 4377 * if found parse the list checking for a match with the device-type 4378 * value and the inquiry string returned from the device. If a match 4379 * is found, parse the mpxio options list. The format of the 4380 * device-type-mpxio-options-list is: 4381 * device-type-mpxio-options-list= 4382 * "device-type=SUN SENA", "load-balance-options=logical-block-options" 4383 * "device-type=SUN SE6920", "round-robin-options"; 4384 * logical-block-options="load-balance=logical-block", "region-size=15"; 4385 * round-robin-options="load-balance=round-robin"; 4386 */ 4387 void 4388 vhci_get_device_type_mpxio_options(dev_info_t *dip, dev_info_t *cdip, 4389 struct scsi_device *devp) 4390 { 4391 4392 caddr_t config_list = NULL; 4393 caddr_t vidptr, datanameptr; 4394 int vidlen, dupletlen = 0; 4395 int config_list_len = 0, len; 4396 struct scsi_inquiry *inq = devp->sd_inq; 4397 4398 /* 4399 * look up the device-type-mpxio-options-list and walk thru 4400 * the list compare the vendor ids of the earlier inquiry command and 4401 * with those vids in the list if there is a match, lookup 4402 * the mpxio-options value 4403 */ 4404 if (ddi_getlongprop(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, 4405 MPXIO_OPTIONS_LIST, 4406 (caddr_t)&config_list, &config_list_len) == DDI_PROP_SUCCESS) { 4407 4408 /* 4409 * Compare vids in each duplet - if it matches, 4410 * parse the mpxio options list. 4411 */ 4412 for (len = config_list_len, vidptr = config_list; len > 0; 4413 len -= dupletlen) { 4414 4415 dupletlen = 0; 4416 4417 if (strlen(vidptr) != 0 && 4418 strncmp(vidptr, DEVICE_TYPE_STR, 4419 strlen(DEVICE_TYPE_STR)) == 0) { 4420 /* point to next duplet */ 4421 datanameptr = vidptr + strlen(vidptr) + 1; 4422 /* add len of this duplet */ 4423 dupletlen += strlen(vidptr) + 1; 4424 /* get to device type */ 4425 vidptr += strlen(DEVICE_TYPE_STR) + 1; 4426 vidlen = strlen(vidptr); 4427 if ((vidlen != 0) && 4428 bcmp(inq->inq_vid, vidptr, vidlen) == 0) { 4429 vhci_parse_mpxio_options(dip, cdip, 4430 datanameptr, len - dupletlen); 4431 break; 4432 } 4433 /* get to next duplet */ 4434 vidptr += strlen(vidptr) + 1; 4435 } 4436 /* get to the next device-type */ 4437 while (len - dupletlen > 0 && 4438 strlen(vidptr) != 0 && 4439 strncmp(vidptr, DEVICE_TYPE_STR, 4440 strlen(DEVICE_TYPE_STR)) != 0) { 4441 dupletlen += strlen(vidptr) + 1; 4442 vidptr += strlen(vidptr) + 1; 4443 } 4444 } 4445 if (config_list_len > 0) { 4446 kmem_free(config_list, config_list_len); 4447 } 4448 } 4449 } 4450 4451 static int 4452 vhci_update_pathinfo(struct scsi_device *psd, mdi_pathinfo_t *pip, 4453 struct scsi_failover_ops *fo, 4454 scsi_vhci_lun_t *vlun, 4455 struct scsi_vhci *vhci) 4456 { 4457 struct scsi_path_opinfo opinfo; 4458 char *pclass, *best_pclass; 4459 4460 if ((*fo->sfo_path_get_opinfo)(psd, &opinfo, 4461 vlun->svl_fops_ctpriv) != 0) { 4462 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_update_pathinfo: " 4463 "Failed to get operation info for path:%p\n", (void *)pip)); 4464 return (MDI_FAILURE); 4465 } 4466 /* set the xlf capable flag in the vlun for future use */ 4467 vlun->svl_xlf_capable = opinfo.opinfo_xlf_capable; 4468 (void) mdi_prop_update_string(pip, "path-class", 4469 opinfo.opinfo_path_attr); 4470 4471 pclass = opinfo.opinfo_path_attr; 4472 if (opinfo.opinfo_path_state == SCSI_PATH_ACTIVE) { 4473 mutex_enter(&vlun->svl_mutex); 4474 if (vlun->svl_active_pclass != NULL) { 4475 if (strcmp(vlun->svl_active_pclass, pclass) != 0) { 4476 mutex_exit(&vlun->svl_mutex); 4477 /* 4478 * Externally initiated failover has happened; 4479 * force the path state to be STANDBY/ONLINE, 4480 * next IO will trigger failover and thus 4481 * sync-up the pathstates. Reason we don't 4482 * sync-up immediately by invoking 4483 * vhci_update_pathstates() is because it 4484 * needs a VHCI_HOLD_LUN() and we don't 4485 * want to block here. 4486 * 4487 * Further, if the device is an ALUA device, 4488 * then failure to exactly match 'pclass' and 4489 * 'svl_active_pclass'(as is the case here) 4490 * indicates that the currently active path 4491 * is a 'non-optimized' path - which means 4492 * that 'svl_active_pclass' needs to be 4493 * replaced with opinfo.opinfo_path_state 4494 * value. 4495 */ 4496 4497 if (SCSI_FAILOVER_IS_TPGS(vlun->svl_fops)) { 4498 char *tptr; 4499 4500 /* 4501 * The device is ALUA compliant. The 4502 * state need to be changed to online 4503 * rather than standby state which is 4504 * done typically for a asymmetric 4505 * device that is non ALUA compliant. 4506 */ 4507 mdi_pi_set_state(pip, 4508 MDI_PATHINFO_STATE_ONLINE); 4509 tptr = kmem_alloc(strlen 4510 (opinfo.opinfo_path_attr)+1, 4511 KM_SLEEP); 4512 (void) strlcpy(tptr, 4513 opinfo.opinfo_path_attr, 4514 (strlen(opinfo.opinfo_path_attr) 4515 +1)); 4516 mutex_enter(&vlun->svl_mutex); 4517 kmem_free(vlun->svl_active_pclass, 4518 strlen(vlun->svl_active_pclass)+1); 4519 vlun->svl_active_pclass = tptr; 4520 mutex_exit(&vlun->svl_mutex); 4521 } else { 4522 /* 4523 * Non ALUA device case. 4524 */ 4525 mdi_pi_set_state(pip, 4526 MDI_PATHINFO_STATE_STANDBY); 4527 } 4528 vlun->svl_fo_support = opinfo.opinfo_mode; 4529 mdi_pi_set_preferred(pip, 4530 opinfo.opinfo_preferred); 4531 return (MDI_SUCCESS); 4532 } 4533 } else { 4534 char *tptr; 4535 4536 /* 4537 * lets release the mutex before we try to 4538 * allocate since the potential to sleep is 4539 * possible. 4540 */ 4541 mutex_exit(&vlun->svl_mutex); 4542 tptr = kmem_alloc(strlen(pclass)+1, KM_SLEEP); 4543 (void) strlcpy(tptr, pclass, (strlen(pclass)+1)); 4544 mutex_enter(&vlun->svl_mutex); 4545 vlun->svl_active_pclass = tptr; 4546 } 4547 mutex_exit(&vlun->svl_mutex); 4548 mdi_pi_set_state(pip, MDI_PATHINFO_STATE_ONLINE); 4549 vlun->svl_waiting_for_activepath = 0; 4550 } else if (opinfo.opinfo_path_state == SCSI_PATH_ACTIVE_NONOPT) { 4551 mutex_enter(&vlun->svl_mutex); 4552 if (vlun->svl_active_pclass == NULL) { 4553 char *tptr; 4554 4555 mutex_exit(&vlun->svl_mutex); 4556 tptr = kmem_alloc(strlen(pclass)+1, KM_SLEEP); 4557 (void) strlcpy(tptr, pclass, (strlen(pclass)+1)); 4558 mutex_enter(&vlun->svl_mutex); 4559 vlun->svl_active_pclass = tptr; 4560 } 4561 mutex_exit(&vlun->svl_mutex); 4562 mdi_pi_set_state(pip, MDI_PATHINFO_STATE_ONLINE); 4563 vlun->svl_waiting_for_activepath = 0; 4564 } else if (opinfo.opinfo_path_state == SCSI_PATH_INACTIVE) { 4565 mutex_enter(&vlun->svl_mutex); 4566 if (vlun->svl_active_pclass != NULL) { 4567 if (strcmp(vlun->svl_active_pclass, pclass) == 0) { 4568 mutex_exit(&vlun->svl_mutex); 4569 /* 4570 * externally initiated failover has happened; 4571 * force state to ONLINE (see comment above) 4572 */ 4573 mdi_pi_set_state(pip, 4574 MDI_PATHINFO_STATE_ONLINE); 4575 vlun->svl_fo_support = opinfo.opinfo_mode; 4576 mdi_pi_set_preferred(pip, 4577 opinfo.opinfo_preferred); 4578 return (MDI_SUCCESS); 4579 } 4580 } 4581 mutex_exit(&vlun->svl_mutex); 4582 mdi_pi_set_state(pip, MDI_PATHINFO_STATE_STANDBY); 4583 4584 /* 4585 * Initiate auto-failback, if enabled, for path if path-state 4586 * is transitioning from OFFLINE->STANDBY and pathclass is the 4587 * prefered pathclass for this storage. 4588 * NOTE: In case where opinfo_path_state is SCSI_PATH_ACTIVE 4589 * (above), where the pi state is set to STANDBY, we don't 4590 * initiate auto-failback as the next IO shall take care of. 4591 * this. See comment above. 4592 */ 4593 (*fo->sfo_pathclass_next)(NULL, &best_pclass, 4594 vlun->svl_fops_ctpriv); 4595 if (((vhci->vhci_conf_flags & VHCI_CONF_FLAGS_AUTO_FAILBACK) == 4596 VHCI_CONF_FLAGS_AUTO_FAILBACK) && 4597 ((strcmp(pclass, best_pclass) == 0) || 4598 mdi_pi_get_preferred(pip) == 1) && 4599 ((MDI_PI_OLD_STATE(pip) == MDI_PATHINFO_STATE_OFFLINE)|| 4600 (MDI_PI_OLD_STATE(pip) == MDI_PATHINFO_STATE_INIT))) { 4601 VHCI_DEBUG(1, (CE_NOTE, NULL, "%s pathclass path: %p" 4602 " OFFLINE->STANDBY transition for lun %s\n", 4603 best_pclass, (void *)pip, vlun->svl_lun_wwn)); 4604 (void) taskq_dispatch(vhci->vhci_taskq, 4605 vhci_initiate_auto_failback, (void *) vlun, 4606 KM_SLEEP); 4607 } 4608 } 4609 vlun->svl_fo_support = opinfo.opinfo_mode; 4610 mdi_pi_set_preferred(pip, opinfo.opinfo_preferred); 4611 4612 VHCI_DEBUG(8, (CE_NOTE, NULL, "vhci_update_pathinfo: opinfo_rev = %x," 4613 " opinfo_path_state = %x opinfo_preferred = %x, opinfo_mode = %x\n", 4614 opinfo.opinfo_rev, opinfo.opinfo_path_state, 4615 opinfo.opinfo_preferred, opinfo.opinfo_mode)); 4616 4617 return (MDI_SUCCESS); 4618 } 4619 4620 /* 4621 * Form the kstat name and and call mdi_pi_kstat_create() 4622 */ 4623 void 4624 vhci_kstat_create_pathinfo(mdi_pathinfo_t *pip) 4625 { 4626 dev_info_t *tgt_dip; 4627 dev_info_t *pdip; 4628 char *guid; 4629 char *target_port, *target_port_dup; 4630 char ks_name[KSTAT_STRLEN]; 4631 uint_t pid; 4632 int by_id; 4633 mod_hash_val_t hv; 4634 4635 4636 /* return if we have already allocated kstats */ 4637 if (mdi_pi_kstat_exists(pip)) 4638 return; 4639 4640 /* 4641 * We need instance numbers to create a kstat name, return if we don't 4642 * have instance numbers assigned yet. 4643 */ 4644 tgt_dip = mdi_pi_get_client(pip); 4645 pdip = mdi_pi_get_phci(pip); 4646 if ((ddi_get_instance(tgt_dip) == -1) || (ddi_get_instance(pdip) == -1)) 4647 return; 4648 4649 /* 4650 * A path oriented kstat has a ks_name of the form: 4651 * 4652 * <client-driver><instance>.t<pid>.<pHCI-driver><instance> 4653 * 4654 * We maintain a bidirectional 'target-port' to <pid> map, 4655 * called targetmap. All pathinfo nodes with the same 4656 * 'target-port' map to the same <pid>. The iostat(1M) code, 4657 * when parsing a path oriented kstat name, uses the <pid> as 4658 * a SCSI_VHCI_GET_TARGET_LONGNAME ioctl argument in order 4659 * to get the 'target-port'. For KSTAT_FLAG_PERSISTENT kstats, 4660 * this ioctl needs to translate a <pid> to a 'target-port' 4661 * even after all pathinfo nodes associated with the 4662 * 'target-port' have been destroyed. This is needed to support 4663 * consistent first-iteration activity-since-boot iostat(1M) 4664 * output. Because of this requirement, the mapping can't be 4665 * based on pathinfo information in a devinfo snapshot. 4666 */ 4667 4668 /* determine 'target-port' */ 4669 if (mdi_prop_lookup_string(pip, 4670 "target-port", &target_port) == MDI_SUCCESS) { 4671 target_port_dup = i_ddi_strdup(target_port, KM_SLEEP); 4672 (void) mdi_prop_free(target_port); 4673 by_id = 1; 4674 } else { 4675 /* 4676 * If the pHCI did not set up 'target-port' on this 4677 * pathinfo node, assume that our client is the only 4678 * one with paths to the device by using the guid 4679 * value as the 'target-port'. Since no other client 4680 * will have the same guid, no other client will use 4681 * the same <pid>. NOTE: a client with an instance 4682 * number always has a guid. 4683 */ 4684 (void) ddi_prop_lookup_string(DDI_DEV_T_ANY, tgt_dip, 4685 PROPFLAGS, MDI_CLIENT_GUID_PROP, &guid); 4686 target_port_dup = i_ddi_strdup(guid, KM_SLEEP); 4687 ddi_prop_free(guid); 4688 4689 /* 4690 * For this type of mapping we don't want the 4691 * <id> -> 'target-port' mapping to be made. This 4692 * will cause the SCSI_VHCI_GET_TARGET_LONGNAME ioctl 4693 * to fail, and the iostat(1M) long '-n' output will 4694 * still use the <pid>. We do this because we just 4695 * made up the 'target-port' using the guid, and we 4696 * don't want to expose that fact in iostat output. 4697 */ 4698 by_id = 0; 4699 } 4700 4701 /* find/establish <pid> given 'target-port' */ 4702 mutex_enter(&vhci_targetmap_mutex); 4703 if (mod_hash_find(vhci_targetmap_byport, 4704 (mod_hash_key_t)target_port_dup, &hv) == 0) { 4705 pid = (int)(intptr_t)hv; /* mapping exists */ 4706 } else { 4707 pid = vhci_targetmap_pid++; /* new mapping */ 4708 4709 (void) mod_hash_insert(vhci_targetmap_byport, 4710 (mod_hash_key_t)target_port_dup, 4711 (mod_hash_val_t)(intptr_t)pid); 4712 if (by_id) { 4713 (void) mod_hash_insert(vhci_targetmap_bypid, 4714 (mod_hash_key_t)(uintptr_t)pid, 4715 (mod_hash_val_t)(uintptr_t)target_port_dup); 4716 } 4717 target_port_dup = NULL; /* owned by hash */ 4718 } 4719 mutex_exit(&vhci_targetmap_mutex); 4720 4721 /* form kstat name */ 4722 (void) snprintf(ks_name, KSTAT_STRLEN, "%s%d.t%d.%s%d", 4723 ddi_driver_name(tgt_dip), ddi_get_instance(tgt_dip), 4724 pid, ddi_driver_name(pdip), ddi_get_instance(pdip)); 4725 4726 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_path_online: path:%p " 4727 "kstat %s: pid %x <-> port %s\n", (void *)pip, 4728 ks_name, pid, target_port_dup)); 4729 if (target_port_dup) 4730 kmem_free(target_port_dup, strlen(target_port_dup) + 1); 4731 4732 /* call mdi to create kstats with the name we built */ 4733 (void) mdi_pi_kstat_create(pip, ks_name); 4734 } 4735 4736 /* ARGSUSED */ 4737 static int 4738 vhci_pathinfo_online(dev_info_t *vdip, mdi_pathinfo_t *pip, int flags) 4739 { 4740 scsi_hba_tran_t *hba = NULL; 4741 struct scsi_device *psd = NULL; 4742 scsi_vhci_lun_t *vlun = NULL; 4743 dev_info_t *pdip = NULL; 4744 dev_info_t *tgt_dip; 4745 struct scsi_vhci *vhci; 4746 char *guid; 4747 struct scsi_failover *sf; 4748 struct scsi_failover_ops *sfo; 4749 char *override; 4750 scsi_vhci_priv_t *svp = NULL; 4751 struct buf *bp; 4752 struct scsi_address *ap; 4753 struct scsi_pkt *pkt; 4754 int rval = MDI_FAILURE; 4755 uint_t inq_size = VHCI_STD_INQ_SIZE; 4756 mpapi_item_list_t *list_ptr; 4757 mpapi_lu_data_t *ld; 4758 4759 ASSERT(vdip != NULL); 4760 ASSERT(pip != NULL); 4761 4762 vhci = ddi_get_soft_state(vhci_softstate, ddi_get_instance(vdip)); 4763 ASSERT(vhci != NULL); 4764 4765 pdip = mdi_pi_get_phci(pip); 4766 hba = ddi_get_driver_private(pdip); 4767 ASSERT(hba != NULL); 4768 4769 svp = (scsi_vhci_priv_t *)mdi_pi_get_vhci_private(pip); 4770 ASSERT(svp != NULL); 4771 4772 tgt_dip = mdi_pi_get_client(pip); 4773 ASSERT(tgt_dip != NULL); 4774 if (ddi_prop_lookup_string(DDI_DEV_T_ANY, tgt_dip, PROPFLAGS, 4775 MDI_CLIENT_GUID_PROP, &guid) != DDI_SUCCESS) { 4776 VHCI_DEBUG(1, (CE_WARN, NULL, "vhci_path_online: lun guid " 4777 "property failed")); 4778 goto failure; 4779 } 4780 4781 vlun = vhci_lun_lookup(tgt_dip); 4782 ASSERT(vlun != NULL); 4783 4784 ddi_prop_free(guid); 4785 4786 vlun->svl_dip = mdi_pi_get_client(pip); 4787 ASSERT(vlun->svl_dip != NULL); 4788 4789 psd = svp->svp_psd; 4790 ASSERT(psd != NULL); 4791 4792 /* 4793 * For INQUIRY response buffer size, we use VHCI_STD_INQ_SIZE(128bytes) 4794 * instead of SUN_INQSIZE(48bytes) which is used in sd layer. This is 4795 * because we could get the Vendor specific parameters(present 97th 4796 * byte onwards) which are required to process Vendor specific data 4797 * based on array type. 4798 * This INQUIRY buffer is freed in vhci_pathinfo_offline but NEVER 4799 * in a different layer like sd/phci transport. In other words, vhci 4800 * maintains its own copy of scsi_device and scsi_inquiry data on a 4801 * per-path basis. 4802 */ 4803 if (psd->sd_inq == NULL) { 4804 psd->sd_inq = (struct scsi_inquiry *) 4805 kmem_zalloc(inq_size, KM_SLEEP); 4806 } 4807 4808 tgt_dip = psd->sd_dev; 4809 ASSERT(tgt_dip != NULL); 4810 4811 /* 4812 * do inquiry to pass into probe routine; this 4813 * will avoid each probe routine doing scsi inquiry 4814 */ 4815 bp = getrbuf(KM_SLEEP); 4816 bp->b_un.b_addr = (caddr_t)psd->sd_inq; 4817 bp->b_flags = B_READ; 4818 bp->b_bcount = inq_size; 4819 bp->b_resid = 0; 4820 4821 ap = &psd->sd_address; 4822 pkt = scsi_init_pkt(ap, NULL, bp, CDB_GROUP0, 4823 sizeof (struct scsi_arq_status), 0, 0, SLEEP_FUNC, NULL); 4824 if (pkt == NULL) { 4825 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_pathinfo_online: " 4826 "Inquiry init_pkt failed :%p\n", (void *)pip)); 4827 rval = MDI_FAILURE; 4828 goto failure; 4829 } 4830 pkt->pkt_cdbp[0] = SCMD_INQUIRY; 4831 pkt->pkt_cdbp[4] = (uchar_t)inq_size; 4832 pkt->pkt_time = 60; 4833 4834 rval = vhci_do_scsi_cmd(pkt); 4835 scsi_destroy_pkt(pkt); 4836 freerbuf(bp); 4837 if (rval == 0) { 4838 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_pathinfo_online: " 4839 "Failover Inquiry failed path:%p rval:%x\n", 4840 (void *)pip, rval)); 4841 rval = MDI_FAILURE; 4842 goto failure; 4843 } 4844 4845 /* 4846 * Determine if device is supported under scsi_vhci, and select 4847 * failover module. 4848 * 4849 * See if there is a scsi_vhci.conf file override for this devices's 4850 * VID/PID. The following values can be returned: 4851 * 4852 * NULL If the NULL is returned then there is no scsi_vhci.conf 4853 * override. For NULL, we determine the failover_ops for 4854 * this device by checking the sfo_device_probe entry 4855 * point for each 'fops' module, in order. 4856 * 4857 * NOTE: Correct operation may depend on module ordering 4858 * of 'specific' (failover modules that are completely 4859 * VID/PID table based) to 'generic' (failover modules 4860 * that based on T10 standards like TPGS). Currently, 4861 * the value of 'ddi-forceload' in scsi_vhci.conf is used 4862 * to establish the module list and probe order. 4863 * 4864 * "NONE" If value "NONE" is returned then there is a 4865 * scsi_vhci.conf VID/PID override to indicate the device 4866 * should not be supported under scsi_vhci (even if there 4867 * is an 'fops' module supporting the device). 4868 * 4869 * "<other>" If another value is returned then that value is the 4870 * name of the 'fops' module that should be used. 4871 */ 4872 sfo = NULL; /* "NONE" */ 4873 override = scsi_get_device_type_string( 4874 "scsi-vhci-failover-override", vdip, psd); 4875 4876 if (override == NULL) { 4877 /* NULL: default: select based on sfo_device_probe results */ 4878 for (sf = scsi_failover_table; sf->sf_mod; sf++) { 4879 if ((sf->sf_sfo == NULL) || 4880 ((*sf->sf_sfo->sfo_device_probe) (psd, 4881 psd->sd_inq, &vlun->svl_fops_ctpriv) == 4882 SFO_DEVICE_PROBE_PHCI)) 4883 continue; 4884 4885 /* found failover module, supported under scsi_vhci */ 4886 sfo = sf->sf_sfo; 4887 vlun->svl_fops_name = 4888 i_ddi_strdup(sfo->sfo_name, KM_SLEEP); 4889 break; 4890 } 4891 } else if (strcmp(override, "NONE") && strcmp(override, "none")) { 4892 /* !"NONE": select based on driver.conf specified name */ 4893 for (sf = scsi_failover_table, sfo = NULL; sf->sf_mod; sf++) { 4894 if ((sf->sf_sfo == NULL) || 4895 (sf->sf_sfo->sfo_name == NULL) || 4896 strcmp(override, sf->sf_sfo->sfo_name)) 4897 continue; 4898 4899 /* found failover module, supported under scsi_vhci */ 4900 sfo = sf->sf_sfo; 4901 vlun->svl_fops_name = kmem_alloc(strlen("conf ") + 4902 strlen(sfo->sfo_name) + 1, KM_SLEEP); 4903 (void) sprintf(vlun->svl_fops_name, "conf %s", 4904 sfo->sfo_name); 4905 break; 4906 } 4907 } 4908 if (override) 4909 kmem_free(override, strlen(override) + 1); 4910 4911 if (sfo == NULL) { 4912 /* no failover module - device not supported */ 4913 VHCI_DEBUG(1, (CE_NOTE, vhci->vhci_dip, 4914 "!vhci_pathinfo_online: dev (path 0x%p) not " 4915 "supported\n", (void *)pip)); 4916 vlun->svl_not_supported = 1; 4917 rval = MDI_NOT_SUPPORTED; 4918 goto done; 4919 } 4920 4921 /* failover supported for device - save failover_ops in vlun */ 4922 vlun->svl_fops = sfo; 4923 4924 /* 4925 * Obtain the device-type based mpxio options as specified in 4926 * scsi_vhci.conf file. 4927 * 4928 * NOTE: currently, the end result is a call to 4929 * mdi_set_lb_region_size(). 4930 */ 4931 vhci_get_device_type_mpxio_options(vdip, tgt_dip, psd); 4932 4933 /* 4934 * if PGR is active, revalidate key and register on this path also, 4935 * if key is still valid 4936 */ 4937 sema_p(&vlun->svl_pgr_sema); 4938 if (vlun->svl_pgr_active) { 4939 rval = vhci_pgr_validate_and_register(svp); 4940 if (rval != 1) { 4941 rval = MDI_FAILURE; 4942 sema_v(&vlun->svl_pgr_sema); 4943 goto failure; 4944 } 4945 } 4946 sema_v(&vlun->svl_pgr_sema); 4947 4948 if (svp->svp_new_path) { 4949 /* 4950 * Last chance to perform any cleanup operations on this 4951 * new path before making this path completely online. 4952 */ 4953 svp->svp_new_path = 0; 4954 4955 /* 4956 * If scsi_vhci knows the lun is alread RESERVE'd, 4957 * then skip the issue of RELEASE on new path. 4958 */ 4959 if ((vlun->svl_flags & VLUN_RESERVE_ACTIVE_FLG) == 0) { 4960 /* 4961 * Issue SCSI-2 RELEASE only for the first time on 4962 * a new path just in case the host rebooted and 4963 * a reservation is still pending on this path. 4964 * IBM Shark storage does not clear RESERVE upon 4965 * host reboot. 4966 */ 4967 ap = &psd->sd_address; 4968 pkt = scsi_init_pkt(ap, NULL, NULL, CDB_GROUP0, 4969 sizeof (struct scsi_arq_status), 0, 0, 4970 SLEEP_FUNC, NULL); 4971 if (pkt == NULL) { 4972 VHCI_DEBUG(1, (CE_NOTE, NULL, 4973 "!vhci_pathinfo_online: " 4974 "Release init_pkt failed :%p\n", 4975 (void *)pip)); 4976 rval = MDI_FAILURE; 4977 goto failure; 4978 } 4979 pkt->pkt_cdbp[0] = SCMD_RELEASE; 4980 pkt->pkt_time = 60; 4981 4982 VHCI_DEBUG(1, (CE_NOTE, NULL, 4983 "!vhci_path_online: path:%p " 4984 "Issued SCSI-2 RELEASE\n", (void *)pip)); 4985 4986 /* Ignore the return value */ 4987 (void) vhci_do_scsi_cmd(pkt); 4988 scsi_destroy_pkt(pkt); 4989 } 4990 } 4991 4992 rval = vhci_update_pathinfo(psd, pip, sfo, vlun, vhci); 4993 if (rval == MDI_FAILURE) { 4994 goto failure; 4995 } 4996 4997 /* Initialize MP-API data */ 4998 vhci_update_mpapi_data(vhci, vlun, pip); 4999 5000 /* 5001 * MP-API also needs the Inquiry data to be maintained in the 5002 * mp_vendor_prop_t structure, so find the lun and update its 5003 * structure with this data. 5004 */ 5005 list_ptr = (mpapi_item_list_t *)vhci_get_mpapi_item(vhci, NULL, 5006 MP_OBJECT_TYPE_MULTIPATH_LU, (void *)vlun); 5007 ld = (mpapi_lu_data_t *)list_ptr->item->idata; 5008 if (ld != NULL) { 5009 bcopy(psd->sd_inq->inq_vid, ld->prop.prodInfo.vendor, 8); 5010 bcopy(psd->sd_inq->inq_pid, ld->prop.prodInfo.product, 16); 5011 bcopy(psd->sd_inq->inq_revision, ld->prop.prodInfo.revision, 4); 5012 } else { 5013 VHCI_DEBUG(1, (CE_WARN, NULL, "!vhci_pathinfo_online: " 5014 "mpapi_lu_data_t is NULL")); 5015 } 5016 5017 /* create kstats for path */ 5018 vhci_kstat_create_pathinfo(pip); 5019 5020 done: 5021 mutex_enter(&vhci_global_mutex); 5022 cv_broadcast(&vhci_cv); 5023 mutex_exit(&vhci_global_mutex); 5024 5025 if (vlun->svl_setcap_done) { 5026 (void) vhci_pHCI_cap(ap, "sector-size", 5027 vlun->svl_sector_size, 1, pip); 5028 } 5029 5030 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_path_online: path:%p\n", 5031 (void *)pip)); 5032 5033 failure: 5034 if ((rval != MDI_SUCCESS) && psd->sd_inq) { 5035 kmem_free((caddr_t)psd->sd_inq, inq_size); 5036 psd->sd_inq = (struct scsi_inquiry *)NULL; 5037 } 5038 return (rval); 5039 } 5040 5041 /* 5042 * path offline handler. Release all bindings that will not be 5043 * released by the normal packet transport/completion code path. 5044 * Since we don't (presently) keep any bindings alive outside of 5045 * the in-transport packets (which will be released on completion) 5046 * there is not much to do here. 5047 */ 5048 /* ARGSUSED */ 5049 static int 5050 vhci_pathinfo_offline(dev_info_t *vdip, mdi_pathinfo_t *pip, int flags) 5051 { 5052 scsi_hba_tran_t *hba = NULL; 5053 struct scsi_device *psd = NULL; 5054 dev_info_t *pdip = NULL; 5055 dev_info_t *cdip = NULL; 5056 scsi_vhci_priv_t *svp = NULL; 5057 uint_t inq_size = VHCI_STD_INQ_SIZE; 5058 5059 ASSERT(vdip != NULL); 5060 ASSERT(pip != NULL); 5061 5062 pdip = mdi_pi_get_phci(pip); 5063 ASSERT(pdip != NULL); 5064 if (pdip == NULL) { 5065 VHCI_DEBUG(1, (CE_WARN, vdip, "Invalid path 0x%p: NULL " 5066 "phci dip", (void *)pip)); 5067 return (MDI_FAILURE); 5068 } 5069 5070 cdip = mdi_pi_get_client(pip); 5071 ASSERT(cdip != NULL); 5072 if (cdip == NULL) { 5073 VHCI_DEBUG(1, (CE_WARN, vdip, "Invalid path 0x%p: NULL " 5074 "client dip", (void *)pip)); 5075 return (MDI_FAILURE); 5076 } 5077 5078 hba = ddi_get_driver_private(pdip); 5079 ASSERT(hba != NULL); 5080 5081 svp = (scsi_vhci_priv_t *)mdi_pi_get_vhci_private(pip); 5082 if (svp == NULL) { 5083 /* 5084 * mdi_pathinfo node in INIT state can have vHCI private 5085 * information set to null 5086 */ 5087 VHCI_DEBUG(1, (CE_NOTE, vdip, "!vhci_pathinfo_offline: " 5088 "svp is NULL for pip 0x%p\n", (void *)pip)); 5089 return (MDI_SUCCESS); 5090 } 5091 5092 psd = svp->svp_psd; 5093 ASSERT(psd != NULL); 5094 5095 mutex_enter(&svp->svp_mutex); 5096 5097 VHCI_DEBUG(1, (CE_NOTE, vdip, "!vhci_pathinfo_offline: " 5098 "%d cmds pending on path: 0x%p\n", svp->svp_cmds, (void *)pip)); 5099 while (svp->svp_cmds != 0) { 5100 if (cv_timedwait(&svp->svp_cv, &svp->svp_mutex, 5101 ddi_get_lbolt() + 5102 drv_usectohz(vhci_path_quiesce_timeout * 1000000)) == -1) { 5103 /* 5104 * The timeout time reached without the condition 5105 * being signaled. 5106 */ 5107 VHCI_DEBUG(1, (CE_NOTE, vdip, "!vhci_pathinfo_offline: " 5108 "Timeout reached on path 0x%p without the cond\n", 5109 (void *)pip)); 5110 VHCI_DEBUG(1, (CE_NOTE, vdip, "!vhci_pathinfo_offline: " 5111 "%d cmds still pending on path: 0x%p\n", 5112 svp->svp_cmds, (void *)pip)); 5113 break; 5114 } 5115 } 5116 mutex_exit(&svp->svp_mutex); 5117 5118 /* 5119 * Check to see if this vlun has an active SCSI-II RESERVE. And this 5120 * is the pip for the path that has been reserved. 5121 * If so clear the reservation by sending a reset, so the host will not 5122 * get a reservation conflict. Reset the flag VLUN_RESERVE_ACTIVE_FLG 5123 * for this lun. Also a reset notify is sent to the target driver 5124 * just in case the POR check condition is cleared by some other layer 5125 * in the stack. 5126 */ 5127 if (svp->svp_svl->svl_flags & VLUN_RESERVE_ACTIVE_FLG) { 5128 if (pip == svp->svp_svl->svl_resrv_pip) { 5129 if (vhci_recovery_reset(svp->svp_svl, 5130 &svp->svp_psd->sd_address, TRUE, 5131 VHCI_DEPTH_TARGET) == 0) { 5132 VHCI_DEBUG(1, (CE_NOTE, NULL, 5133 "!vhci_pathinfo_offline (pip:%p):" 5134 "reset failed, retrying\n", (void *)pip)); 5135 delay(1*drv_usectohz(1000000)); 5136 if (vhci_recovery_reset(svp->svp_svl, 5137 &svp->svp_psd->sd_address, TRUE, 5138 VHCI_DEPTH_TARGET) == 0) { 5139 VHCI_DEBUG(1, (CE_NOTE, NULL, 5140 "!vhci_pathinfo_offline " 5141 "(pip:%p): reset failed, " 5142 "giving up!\n", (void *)pip)); 5143 } 5144 } 5145 svp->svp_svl->svl_flags &= ~VLUN_RESERVE_ACTIVE_FLG; 5146 } 5147 } 5148 5149 mdi_pi_set_state(pip, MDI_PATHINFO_STATE_OFFLINE); 5150 if (psd->sd_inq) { 5151 kmem_free((caddr_t)psd->sd_inq, inq_size); 5152 psd->sd_inq = (struct scsi_inquiry *)NULL; 5153 } 5154 vhci_mpapi_set_path_state(vdip, pip, MP_DRVR_PATH_STATE_REMOVED); 5155 5156 VHCI_DEBUG(1, (CE_NOTE, NULL, 5157 "!vhci_pathinfo_offline: offlined path 0x%p\n", (void *)pip)); 5158 return (MDI_SUCCESS); 5159 } 5160 5161 5162 /* 5163 * routine for SCSI VHCI IOCTL implementation. 5164 */ 5165 /* ARGSUSED */ 5166 static int 5167 vhci_ctl(dev_t dev, int cmd, intptr_t data, int mode, cred_t *credp, int *rval) 5168 { 5169 struct scsi_vhci *vhci; 5170 dev_info_t *vdip; 5171 mdi_pathinfo_t *pip; 5172 int instance, held; 5173 int retval = 0; 5174 caddr_t phci_path = NULL, client_path = NULL; 5175 caddr_t paddr = NULL; 5176 sv_iocdata_t ioc; 5177 sv_iocdata_t *pioc = &ioc; 5178 sv_switch_to_cntlr_iocdata_t iocsc; 5179 sv_switch_to_cntlr_iocdata_t *piocsc = &iocsc; 5180 caddr_t s; 5181 scsi_vhci_lun_t *vlun; 5182 struct scsi_failover_ops *fo; 5183 char *pclass; 5184 5185 /* Check for validity of vhci structure */ 5186 vhci = ddi_get_soft_state(vhci_softstate, MINOR2INST(getminor(dev))); 5187 if (vhci == NULL) { 5188 return (ENXIO); 5189 } 5190 5191 mutex_enter(&vhci->vhci_mutex); 5192 if ((vhci->vhci_state & VHCI_STATE_OPEN) == 0) { 5193 mutex_exit(&vhci->vhci_mutex); 5194 return (ENXIO); 5195 } 5196 mutex_exit(&vhci->vhci_mutex); 5197 5198 /* Get the vhci dip */ 5199 vdip = vhci->vhci_dip; 5200 ASSERT(vdip != NULL); 5201 instance = ddi_get_instance(vdip); 5202 5203 /* Allocate memory for getting parameters from userland */ 5204 phci_path = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 5205 client_path = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 5206 paddr = kmem_zalloc(MAXNAMELEN, KM_SLEEP); 5207 5208 /* 5209 * Set a local variable indicating the ioctl name. Used for 5210 * printing debug strings. 5211 */ 5212 switch (cmd) { 5213 case SCSI_VHCI_GET_CLIENT_MULTIPATH_INFO: 5214 s = "GET_CLIENT_MULTIPATH_INFO"; 5215 break; 5216 5217 case SCSI_VHCI_GET_PHCI_MULTIPATH_INFO: 5218 s = "GET_PHCI_MULTIPATH_INFO"; 5219 break; 5220 5221 case SCSI_VHCI_GET_CLIENT_NAME: 5222 s = "GET_CLIENT_NAME"; 5223 break; 5224 5225 case SCSI_VHCI_PATH_ONLINE: 5226 s = "PATH_ONLINE"; 5227 break; 5228 5229 case SCSI_VHCI_PATH_OFFLINE: 5230 s = "PATH_OFFLINE"; 5231 break; 5232 5233 case SCSI_VHCI_PATH_STANDBY: 5234 s = "PATH_STANDBY"; 5235 break; 5236 5237 case SCSI_VHCI_PATH_TEST: 5238 s = "PATH_TEST"; 5239 break; 5240 5241 case SCSI_VHCI_SWITCH_TO_CNTLR: 5242 s = "SWITCH_TO_CNTLR"; 5243 break; 5244 case SCSI_VHCI_PATH_DISABLE: 5245 s = "PATH_DISABLE"; 5246 break; 5247 case SCSI_VHCI_PATH_ENABLE: 5248 s = "PATH_ENABLE"; 5249 break; 5250 5251 case SCSI_VHCI_GET_TARGET_LONGNAME: 5252 s = "GET_TARGET_LONGNAME"; 5253 break; 5254 5255 #ifdef DEBUG 5256 case SCSI_VHCI_CONFIGURE_PHCI: 5257 s = "CONFIGURE_PHCI"; 5258 break; 5259 5260 case SCSI_VHCI_UNCONFIGURE_PHCI: 5261 s = "UNCONFIGURE_PHCI"; 5262 break; 5263 #endif 5264 5265 default: 5266 s = "Unknown"; 5267 vhci_log(CE_NOTE, vdip, 5268 "!vhci%d: ioctl %x (unsupported ioctl)", instance, cmd); 5269 retval = ENOTSUP; 5270 break; 5271 } 5272 if (retval != 0) { 5273 goto end; 5274 } 5275 5276 VHCI_DEBUG(6, (CE_WARN, vdip, "!vhci%d: ioctl <%s>", instance, s)); 5277 5278 /* 5279 * Get IOCTL parameters from userland 5280 */ 5281 switch (cmd) { 5282 case SCSI_VHCI_GET_CLIENT_MULTIPATH_INFO: 5283 case SCSI_VHCI_GET_PHCI_MULTIPATH_INFO: 5284 case SCSI_VHCI_GET_CLIENT_NAME: 5285 case SCSI_VHCI_PATH_ONLINE: 5286 case SCSI_VHCI_PATH_OFFLINE: 5287 case SCSI_VHCI_PATH_STANDBY: 5288 case SCSI_VHCI_PATH_TEST: 5289 case SCSI_VHCI_PATH_DISABLE: 5290 case SCSI_VHCI_PATH_ENABLE: 5291 case SCSI_VHCI_GET_TARGET_LONGNAME: 5292 #ifdef DEBUG 5293 case SCSI_VHCI_CONFIGURE_PHCI: 5294 case SCSI_VHCI_UNCONFIGURE_PHCI: 5295 #endif 5296 retval = vhci_get_iocdata((const void *)data, pioc, mode, s); 5297 break; 5298 5299 case SCSI_VHCI_SWITCH_TO_CNTLR: 5300 retval = vhci_get_iocswitchdata((const void *)data, piocsc, 5301 mode, s); 5302 break; 5303 } 5304 if (retval != 0) { 5305 goto end; 5306 } 5307 5308 5309 /* 5310 * Process the IOCTL 5311 */ 5312 switch (cmd) { 5313 case SCSI_VHCI_GET_CLIENT_MULTIPATH_INFO: 5314 { 5315 uint_t num_paths; /* Num paths to client dev */ 5316 sv_path_info_t *upibuf = NULL; /* To keep userland values */ 5317 sv_path_info_t *kpibuf = NULL; /* Kernel data for ioctls */ 5318 dev_info_t *cdip; /* Client device dip */ 5319 5320 if (pioc->ret_elem == NULL) { 5321 retval = EINVAL; 5322 break; 5323 } 5324 5325 /* Get client device path from user land */ 5326 if (vhci_ioc_get_client_path(pioc, client_path, mode, s)) { 5327 retval = EFAULT; 5328 break; 5329 } 5330 5331 VHCI_DEBUG(6, (CE_WARN, vdip, "!vhci_ioctl: ioctl <%s> " 5332 "client <%s>", s, client_path)); 5333 5334 /* Get number of paths to this client device */ 5335 if ((cdip = mdi_client_path2devinfo(vdip, client_path)) 5336 == NULL) { 5337 retval = ENXIO; 5338 VHCI_DEBUG(1, (CE_WARN, NULL, "!vhci_ioctl: ioctl <%s> " 5339 "client dip doesn't exist. invalid path <%s>", 5340 s, client_path)); 5341 break; 5342 } 5343 num_paths = mdi_client_get_path_count(cdip); 5344 5345 if (ddi_copyout(&num_paths, pioc->ret_elem, 5346 sizeof (num_paths), mode)) { 5347 VHCI_DEBUG(1, (CE_WARN, NULL, "!vhci_ioctl: ioctl <%s> " 5348 "num_paths copyout failed", s)); 5349 retval = EFAULT; 5350 break; 5351 } 5352 5353 /* If user just wanted num_paths, then return */ 5354 if (pioc->buf_elem == 0 || pioc->ret_buf == NULL || 5355 num_paths == 0) { 5356 break; 5357 } 5358 5359 /* Set num_paths to value as much as can be sent to userland */ 5360 if (num_paths > pioc->buf_elem) { 5361 num_paths = pioc->buf_elem; 5362 } 5363 5364 /* Allocate memory and get userland pointers */ 5365 if (vhci_ioc_alloc_pathinfo(&upibuf, &kpibuf, num_paths, 5366 pioc, mode, s) != 0) { 5367 retval = EFAULT; 5368 break; 5369 } 5370 ASSERT(upibuf != NULL); 5371 ASSERT(kpibuf != NULL); 5372 5373 /* 5374 * Get the path information and send it to userland. 5375 */ 5376 if (vhci_get_client_path_list(cdip, kpibuf, num_paths) 5377 != MDI_SUCCESS) { 5378 retval = ENXIO; 5379 vhci_ioc_free_pathinfo(upibuf, kpibuf, num_paths); 5380 break; 5381 } 5382 5383 if (vhci_ioc_send_pathinfo(upibuf, kpibuf, num_paths, 5384 pioc, mode, s)) { 5385 retval = EFAULT; 5386 vhci_ioc_free_pathinfo(upibuf, kpibuf, num_paths); 5387 break; 5388 } 5389 5390 /* Free the memory allocated for path information */ 5391 vhci_ioc_free_pathinfo(upibuf, kpibuf, num_paths); 5392 break; 5393 } 5394 5395 case SCSI_VHCI_GET_PHCI_MULTIPATH_INFO: 5396 { 5397 uint_t num_paths; /* Num paths to client dev */ 5398 sv_path_info_t *upibuf = NULL; /* To keep userland values */ 5399 sv_path_info_t *kpibuf = NULL; /* Kernel data for ioctls */ 5400 dev_info_t *pdip; /* PHCI device dip */ 5401 5402 if (pioc->ret_elem == NULL) { 5403 retval = EINVAL; 5404 break; 5405 } 5406 5407 /* Get PHCI device path from user land */ 5408 if (vhci_ioc_get_phci_path(pioc, phci_path, mode, s)) { 5409 retval = EFAULT; 5410 break; 5411 } 5412 5413 VHCI_DEBUG(6, (CE_WARN, vdip, 5414 "!vhci_ioctl: ioctl <%s> phci <%s>", s, phci_path)); 5415 5416 /* Get number of devices associated with this PHCI device */ 5417 if ((pdip = mdi_phci_path2devinfo(vdip, phci_path)) == NULL) { 5418 VHCI_DEBUG(1, (CE_WARN, NULL, "!vhci_ioctl: ioctl <%s> " 5419 "phci dip doesn't exist. invalid path <%s>", 5420 s, phci_path)); 5421 retval = ENXIO; 5422 break; 5423 } 5424 5425 num_paths = mdi_phci_get_path_count(pdip); 5426 5427 if (ddi_copyout(&num_paths, pioc->ret_elem, 5428 sizeof (num_paths), mode)) { 5429 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_ioctl: ioctl <%s> " 5430 "num_paths copyout failed", s)); 5431 retval = EFAULT; 5432 break; 5433 } 5434 5435 /* If user just wanted num_paths, then return */ 5436 if (pioc->buf_elem == 0 || pioc->ret_buf == NULL || 5437 num_paths == 0) { 5438 break; 5439 } 5440 5441 /* Set num_paths to value as much as can be sent to userland */ 5442 if (num_paths > pioc->buf_elem) { 5443 num_paths = pioc->buf_elem; 5444 } 5445 5446 /* Allocate memory and get userland pointers */ 5447 if (vhci_ioc_alloc_pathinfo(&upibuf, &kpibuf, num_paths, 5448 pioc, mode, s) != 0) { 5449 retval = EFAULT; 5450 break; 5451 } 5452 ASSERT(upibuf != NULL); 5453 ASSERT(kpibuf != NULL); 5454 5455 /* 5456 * Get the path information and send it to userland. 5457 */ 5458 if (vhci_get_phci_path_list(pdip, kpibuf, num_paths) 5459 != MDI_SUCCESS) { 5460 retval = ENXIO; 5461 vhci_ioc_free_pathinfo(upibuf, kpibuf, num_paths); 5462 break; 5463 } 5464 5465 if (vhci_ioc_send_pathinfo(upibuf, kpibuf, num_paths, 5466 pioc, mode, s)) { 5467 retval = EFAULT; 5468 vhci_ioc_free_pathinfo(upibuf, kpibuf, num_paths); 5469 break; 5470 } 5471 5472 /* Free the memory allocated for path information */ 5473 vhci_ioc_free_pathinfo(upibuf, kpibuf, num_paths); 5474 break; 5475 } 5476 5477 case SCSI_VHCI_GET_CLIENT_NAME: 5478 { 5479 dev_info_t *cdip, *pdip; 5480 5481 /* Get PHCI path and device address from user land */ 5482 if (vhci_ioc_get_phci_path(pioc, phci_path, mode, s) || 5483 vhci_ioc_get_paddr(pioc, paddr, mode, s)) { 5484 retval = EFAULT; 5485 break; 5486 } 5487 5488 VHCI_DEBUG(6, (CE_WARN, vdip, "!vhci_ioctl: ioctl <%s> " 5489 "phci <%s>, paddr <%s>", s, phci_path, paddr)); 5490 5491 /* Get the PHCI dip */ 5492 if ((pdip = mdi_phci_path2devinfo(vdip, phci_path)) == NULL) { 5493 VHCI_DEBUG(1, (CE_WARN, NULL, "!vhci_ioctl: ioctl <%s> " 5494 "phci dip doesn't exist. invalid path <%s>", 5495 s, phci_path)); 5496 retval = ENXIO; 5497 break; 5498 } 5499 5500 if ((pip = mdi_pi_find(pdip, NULL, paddr)) == NULL) { 5501 VHCI_DEBUG(1, (CE_WARN, vdip, "!vhci_ioctl: ioctl <%s> " 5502 "pathinfo doesn't exist. invalid device addr", s)); 5503 retval = ENXIO; 5504 break; 5505 } 5506 5507 /* Get the client device pathname and send to userland */ 5508 cdip = mdi_pi_get_client(pip); 5509 vhci_ioc_devi_to_path(cdip, client_path); 5510 5511 VHCI_DEBUG(6, (CE_WARN, vdip, "!vhci_ioctl: ioctl <%s> " 5512 "client <%s>", s, client_path)); 5513 5514 if (vhci_ioc_send_client_path(client_path, pioc, mode, s)) { 5515 retval = EFAULT; 5516 break; 5517 } 5518 break; 5519 } 5520 5521 case SCSI_VHCI_PATH_ONLINE: 5522 case SCSI_VHCI_PATH_OFFLINE: 5523 case SCSI_VHCI_PATH_STANDBY: 5524 case SCSI_VHCI_PATH_TEST: 5525 { 5526 dev_info_t *pdip; /* PHCI dip */ 5527 5528 /* Get PHCI path and device address from user land */ 5529 if (vhci_ioc_get_phci_path(pioc, phci_path, mode, s) || 5530 vhci_ioc_get_paddr(pioc, paddr, mode, s)) { 5531 retval = EFAULT; 5532 break; 5533 } 5534 5535 VHCI_DEBUG(6, (CE_WARN, vdip, "!vhci_ioctl: ioctl <%s> " 5536 "phci <%s>, paddr <%s>", s, phci_path, paddr)); 5537 5538 /* Get the PHCI dip */ 5539 if ((pdip = mdi_phci_path2devinfo(vdip, phci_path)) == NULL) { 5540 VHCI_DEBUG(1, (CE_WARN, NULL, "!vhci_ioctl: ioctl <%s> " 5541 "phci dip doesn't exist. invalid path <%s>", 5542 s, phci_path)); 5543 retval = ENXIO; 5544 break; 5545 } 5546 5547 if ((pip = mdi_pi_find(pdip, NULL, paddr)) == NULL) { 5548 VHCI_DEBUG(1, (CE_WARN, vdip, "!vhci_ioctl: ioctl <%s> " 5549 "pathinfo doesn't exist. invalid device addr", s)); 5550 retval = ENXIO; 5551 break; 5552 } 5553 5554 VHCI_DEBUG(6, (CE_WARN, vdip, "!vhci_ioctl: ioctl <%s> " 5555 "Calling MDI function to change device state", s)); 5556 5557 switch (cmd) { 5558 case SCSI_VHCI_PATH_ONLINE: 5559 retval = mdi_pi_online(pip, 0); 5560 break; 5561 5562 case SCSI_VHCI_PATH_OFFLINE: 5563 retval = mdi_pi_offline(pip, 0); 5564 break; 5565 5566 case SCSI_VHCI_PATH_STANDBY: 5567 retval = mdi_pi_standby(pip, 0); 5568 break; 5569 5570 case SCSI_VHCI_PATH_TEST: 5571 break; 5572 } 5573 break; 5574 } 5575 5576 case SCSI_VHCI_SWITCH_TO_CNTLR: 5577 { 5578 dev_info_t *cdip; 5579 struct scsi_device *devp; 5580 5581 /* Get the client device pathname */ 5582 if (ddi_copyin(piocsc->client, client_path, 5583 MAXPATHLEN, mode)) { 5584 VHCI_DEBUG(2, (CE_WARN, vdip, "!vhci_ioctl: ioctl <%s> " 5585 "client_path copyin failed", s)); 5586 retval = EFAULT; 5587 break; 5588 } 5589 5590 /* Get the path class to which user wants to switch */ 5591 if (ddi_copyin(piocsc->class, paddr, MAXNAMELEN, mode)) { 5592 VHCI_DEBUG(2, (CE_WARN, vdip, "!vhci_ioctl: ioctl <%s> " 5593 "controller_class copyin failed", s)); 5594 retval = EFAULT; 5595 break; 5596 } 5597 5598 /* Perform validity checks */ 5599 if ((cdip = mdi_client_path2devinfo(vdip, 5600 client_path)) == NULL) { 5601 VHCI_DEBUG(1, (CE_WARN, NULL, "!vhci_ioctl: ioctl <%s> " 5602 "client dip doesn't exist. invalid path <%s>", 5603 s, client_path)); 5604 retval = ENXIO; 5605 break; 5606 } 5607 5608 VHCI_DEBUG(6, (CE_WARN, vdip, "!vhci_ioctl: Calling MDI func " 5609 "to switch controller")); 5610 VHCI_DEBUG(6, (CE_WARN, vdip, "!vhci_ioctl: client <%s> " 5611 "class <%s>", client_path, paddr)); 5612 5613 if (strcmp(paddr, PCLASS_PRIMARY) && 5614 strcmp(paddr, PCLASS_SECONDARY)) { 5615 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_ioctl: ioctl <%s> " 5616 "invalid path class <%s>", s, paddr)); 5617 retval = ENXIO; 5618 break; 5619 } 5620 5621 devp = ddi_get_driver_private(cdip); 5622 if (devp == NULL) { 5623 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_ioctl: ioctl <%s> " 5624 "invalid scsi device <%s>", s, client_path)); 5625 retval = ENXIO; 5626 break; 5627 } 5628 vlun = ADDR2VLUN(&devp->sd_address); 5629 ASSERT(vlun); 5630 5631 /* 5632 * Checking to see if device has only one pclass, PRIMARY. 5633 * If so this device doesn't support failovers. Assumed 5634 * that the devices with one pclass is PRIMARY, as thats the 5635 * case today. If this is not true and in future other 5636 * symmetric devices are supported with other pclass, this 5637 * IOCTL shall have to be overhauled anyways as now the only 5638 * arguments it accepts are PRIMARY and SECONDARY. 5639 */ 5640 fo = vlun->svl_fops; 5641 if ((*fo->sfo_pathclass_next)(PCLASS_PRIMARY, &pclass, 5642 vlun->svl_fops_ctpriv)) { 5643 retval = ENOTSUP; 5644 break; 5645 } 5646 5647 VHCI_HOLD_LUN(vlun, VH_SLEEP, held); 5648 mutex_enter(&vlun->svl_mutex); 5649 if (vlun->svl_active_pclass != NULL) { 5650 if (strcmp(vlun->svl_active_pclass, paddr) == 0) { 5651 mutex_exit(&vlun->svl_mutex); 5652 retval = EALREADY; 5653 VHCI_RELEASE_LUN(vlun); 5654 break; 5655 } 5656 } 5657 mutex_exit(&vlun->svl_mutex); 5658 /* Call mdi function to cause a switch over */ 5659 retval = mdi_failover(vdip, cdip, MDI_FAILOVER_SYNC); 5660 if (retval == MDI_SUCCESS) { 5661 retval = 0; 5662 } else if (retval == MDI_BUSY) { 5663 retval = EBUSY; 5664 } else { 5665 retval = EIO; 5666 } 5667 VHCI_RELEASE_LUN(vlun); 5668 break; 5669 } 5670 5671 case SCSI_VHCI_PATH_ENABLE: 5672 case SCSI_VHCI_PATH_DISABLE: 5673 { 5674 dev_info_t *cdip, *pdip; 5675 5676 /* 5677 * Get client device path from user land 5678 */ 5679 if (vhci_ioc_get_client_path(pioc, client_path, mode, s)) { 5680 retval = EFAULT; 5681 break; 5682 } 5683 5684 /* 5685 * Get Phci device path from user land 5686 */ 5687 if (vhci_ioc_get_phci_path(pioc, phci_path, mode, s)) { 5688 retval = EFAULT; 5689 break; 5690 } 5691 5692 /* 5693 * Get the devinfo for the Phci. 5694 */ 5695 if ((pdip = mdi_phci_path2devinfo(vdip, phci_path)) == NULL) { 5696 VHCI_DEBUG(1, (CE_WARN, NULL, "!vhci_ioctl: ioctl <%s> " 5697 "phci dip doesn't exist. invalid path <%s>", 5698 s, phci_path)); 5699 retval = ENXIO; 5700 break; 5701 } 5702 5703 /* 5704 * If the client path is set to /scsi_vhci then we need 5705 * to do the operation on all the clients so set cdip to NULL. 5706 * Else, try to get the client dip. 5707 */ 5708 if (strcmp(client_path, "/scsi_vhci") == 0) { 5709 cdip = NULL; 5710 } else { 5711 if ((cdip = mdi_client_path2devinfo(vdip, 5712 client_path)) == NULL) { 5713 retval = ENXIO; 5714 VHCI_DEBUG(1, (CE_WARN, NULL, 5715 "!vhci_ioctl: ioctl <%s> client dip " 5716 "doesn't exist. invalid path <%s>", 5717 s, client_path)); 5718 break; 5719 } 5720 } 5721 5722 if (cmd == SCSI_VHCI_PATH_ENABLE) 5723 retval = mdi_pi_enable(cdip, pdip, USER_DISABLE); 5724 else 5725 retval = mdi_pi_disable(cdip, pdip, USER_DISABLE); 5726 5727 break; 5728 } 5729 5730 case SCSI_VHCI_GET_TARGET_LONGNAME: 5731 { 5732 uint_t pid = pioc->buf_elem; 5733 char *target_port; 5734 mod_hash_val_t hv; 5735 5736 /* targetmap lookup of 'target-port' by <pid> */ 5737 if (mod_hash_find(vhci_targetmap_bypid, 5738 (mod_hash_key_t)(uintptr_t)pid, &hv) != 0) { 5739 /* 5740 * NOTE: failure to find the mapping is OK for guid 5741 * based 'target-port' values. 5742 */ 5743 VHCI_DEBUG(3, (CE_WARN, NULL, "!vhci_ioctl: ioctl <%s> " 5744 "targetport mapping doesn't exist: pid %d", 5745 s, pid)); 5746 retval = ENXIO; 5747 break; 5748 } 5749 5750 /* copyout 'target-port' result */ 5751 target_port = (char *)hv; 5752 if (copyoutstr(target_port, pioc->addr, MAXNAMELEN, NULL)) { 5753 VHCI_DEBUG(1, (CE_WARN, NULL, "!vhci_ioctl: ioctl <%s> " 5754 "targetport copyout failed: len: %d", 5755 s, (int)strlen(target_port))); 5756 retval = EFAULT; 5757 } 5758 break; 5759 } 5760 5761 #ifdef DEBUG 5762 case SCSI_VHCI_CONFIGURE_PHCI: 5763 { 5764 dev_info_t *pdip; 5765 5766 /* Get PHCI path and device address from user land */ 5767 if (vhci_ioc_get_phci_path(pioc, phci_path, mode, s)) { 5768 retval = EFAULT; 5769 break; 5770 } 5771 5772 VHCI_DEBUG(6, (CE_WARN, vdip, "!vhci_ioctl: ioctl <%s> " 5773 "phci <%s>", s, phci_path)); 5774 5775 /* Get the PHCI dip */ 5776 if ((pdip = e_ddi_hold_devi_by_path(phci_path, 0)) == NULL) { 5777 VHCI_DEBUG(3, (CE_WARN, NULL, "!vhci_ioctl: ioctl <%s> " 5778 "phci dip doesn't exist. invalid path <%s>", 5779 s, phci_path)); 5780 retval = ENXIO; 5781 break; 5782 } 5783 5784 if (ndi_devi_config(pdip, 5785 NDI_DEVFS_CLEAN|NDI_DEVI_PERSIST) != NDI_SUCCESS) { 5786 retval = EIO; 5787 } 5788 5789 ddi_release_devi(pdip); 5790 break; 5791 } 5792 5793 case SCSI_VHCI_UNCONFIGURE_PHCI: 5794 { 5795 dev_info_t *pdip; 5796 5797 /* Get PHCI path and device address from user land */ 5798 if (vhci_ioc_get_phci_path(pioc, phci_path, mode, s)) { 5799 retval = EFAULT; 5800 break; 5801 } 5802 5803 VHCI_DEBUG(6, (CE_WARN, vdip, "!vhci_ioctl: ioctl <%s> " 5804 "phci <%s>", s, phci_path)); 5805 5806 /* Get the PHCI dip */ 5807 if ((pdip = e_ddi_hold_devi_by_path(phci_path, 0)) == NULL) { 5808 VHCI_DEBUG(3, (CE_WARN, NULL, "!vhci_ioctl: ioctl <%s> " 5809 "phci dip doesn't exist. invalid path <%s>", 5810 s, phci_path)); 5811 retval = ENXIO; 5812 break; 5813 } 5814 5815 if (ndi_devi_unconfig(pdip, 5816 NDI_DEVI_REMOVE|NDI_DEVFS_CLEAN) != NDI_SUCCESS) { 5817 retval = EBUSY; 5818 } 5819 5820 ddi_release_devi(pdip); 5821 break; 5822 } 5823 #endif 5824 } 5825 5826 end: 5827 /* Free the memory allocated above */ 5828 if (phci_path != NULL) { 5829 kmem_free(phci_path, MAXPATHLEN); 5830 } 5831 if (client_path != NULL) { 5832 kmem_free(client_path, MAXPATHLEN); 5833 } 5834 if (paddr != NULL) { 5835 kmem_free(paddr, MAXNAMELEN); 5836 } 5837 return (retval); 5838 } 5839 5840 /* 5841 * devctl IOCTL support for client device DR 5842 */ 5843 /* ARGSUSED */ 5844 int 5845 vhci_devctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *credp, 5846 int *rvalp) 5847 { 5848 dev_info_t *self; 5849 dev_info_t *child; 5850 scsi_hba_tran_t *hba; 5851 struct devctl_iocdata *dcp; 5852 struct scsi_vhci *vhci; 5853 int rv = 0; 5854 int retval = 0; 5855 scsi_vhci_priv_t *svp; 5856 mdi_pathinfo_t *pip; 5857 5858 if ((vhci = ddi_get_soft_state(vhci_softstate, 5859 MINOR2INST(getminor(dev)))) == NULL) 5860 return (ENXIO); 5861 5862 /* 5863 * check if :devctl minor device has been opened 5864 */ 5865 mutex_enter(&vhci->vhci_mutex); 5866 if ((vhci->vhci_state & VHCI_STATE_OPEN) == 0) { 5867 mutex_exit(&vhci->vhci_mutex); 5868 return (ENXIO); 5869 } 5870 mutex_exit(&vhci->vhci_mutex); 5871 5872 self = vhci->vhci_dip; 5873 hba = ddi_get_driver_private(self); 5874 if (hba == NULL) 5875 return (ENXIO); 5876 5877 /* 5878 * We can use the generic implementation for these ioctls 5879 */ 5880 switch (cmd) { 5881 case DEVCTL_DEVICE_GETSTATE: 5882 case DEVCTL_DEVICE_ONLINE: 5883 case DEVCTL_DEVICE_OFFLINE: 5884 case DEVCTL_DEVICE_REMOVE: 5885 case DEVCTL_BUS_GETSTATE: 5886 return (ndi_devctl_ioctl(self, cmd, arg, mode, 0)); 5887 } 5888 5889 /* 5890 * read devctl ioctl data 5891 */ 5892 if (ndi_dc_allochdl((void *)arg, &dcp) != NDI_SUCCESS) 5893 return (EFAULT); 5894 5895 switch (cmd) { 5896 5897 case DEVCTL_DEVICE_RESET: 5898 /* 5899 * lookup and hold child device 5900 */ 5901 if ((child = ndi_devi_find(self, ndi_dc_getname(dcp), 5902 ndi_dc_getaddr(dcp))) == NULL) { 5903 rv = ENXIO; 5904 break; 5905 } 5906 retval = mdi_select_path(child, NULL, 5907 (MDI_SELECT_ONLINE_PATH | MDI_SELECT_STANDBY_PATH), 5908 NULL, &pip); 5909 if ((retval != MDI_SUCCESS) || (pip == NULL)) { 5910 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_ioctl:" 5911 "Unable to get a path, dip 0x%p", (void *)child)); 5912 rv = ENXIO; 5913 break; 5914 } 5915 svp = (scsi_vhci_priv_t *)mdi_pi_get_vhci_private(pip); 5916 if (vhci_recovery_reset(svp->svp_svl, 5917 &svp->svp_psd->sd_address, TRUE, 5918 VHCI_DEPTH_TARGET) == 0) { 5919 VHCI_DEBUG(1, (CE_NOTE, NULL, 5920 "!vhci_ioctl(pip:%p): " 5921 "reset failed\n", (void *)pip)); 5922 rv = ENXIO; 5923 } 5924 mdi_rele_path(pip); 5925 break; 5926 5927 case DEVCTL_BUS_QUIESCE: 5928 case DEVCTL_BUS_UNQUIESCE: 5929 case DEVCTL_BUS_RESET: 5930 case DEVCTL_BUS_RESETALL: 5931 #ifdef DEBUG 5932 case DEVCTL_BUS_CONFIGURE: 5933 case DEVCTL_BUS_UNCONFIGURE: 5934 #endif 5935 rv = ENOTSUP; 5936 break; 5937 5938 default: 5939 rv = ENOTTY; 5940 } /* end of outer switch */ 5941 5942 ndi_dc_freehdl(dcp); 5943 return (rv); 5944 } 5945 5946 /* 5947 * Routine to get the PHCI pathname from ioctl structures in userland 5948 */ 5949 /* ARGSUSED */ 5950 static int 5951 vhci_ioc_get_phci_path(sv_iocdata_t *pioc, caddr_t phci_path, 5952 int mode, caddr_t s) 5953 { 5954 int retval = 0; 5955 5956 if (ddi_copyin(pioc->phci, phci_path, MAXPATHLEN, mode)) { 5957 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_ioc_get_phci: ioctl <%s> " 5958 "phci_path copyin failed", s)); 5959 retval = EFAULT; 5960 } 5961 return (retval); 5962 5963 } 5964 5965 5966 /* 5967 * Routine to get the Client device pathname from ioctl structures in userland 5968 */ 5969 /* ARGSUSED */ 5970 static int 5971 vhci_ioc_get_client_path(sv_iocdata_t *pioc, caddr_t client_path, 5972 int mode, caddr_t s) 5973 { 5974 int retval = 0; 5975 5976 if (ddi_copyin(pioc->client, client_path, MAXPATHLEN, mode)) { 5977 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_ioc_get_client: " 5978 "ioctl <%s> client_path copyin failed", s)); 5979 retval = EFAULT; 5980 } 5981 return (retval); 5982 } 5983 5984 5985 /* 5986 * Routine to get physical device address from ioctl structure in userland 5987 */ 5988 /* ARGSUSED */ 5989 static int 5990 vhci_ioc_get_paddr(sv_iocdata_t *pioc, caddr_t paddr, int mode, caddr_t s) 5991 { 5992 int retval = 0; 5993 5994 if (ddi_copyin(pioc->addr, paddr, MAXNAMELEN, mode)) { 5995 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_ioc_get_paddr: " 5996 "ioctl <%s> device addr copyin failed", s)); 5997 retval = EFAULT; 5998 } 5999 return (retval); 6000 } 6001 6002 6003 /* 6004 * Routine to send client device pathname to userland. 6005 */ 6006 /* ARGSUSED */ 6007 static int 6008 vhci_ioc_send_client_path(caddr_t client_path, sv_iocdata_t *pioc, 6009 int mode, caddr_t s) 6010 { 6011 int retval = 0; 6012 6013 if (ddi_copyout(client_path, pioc->client, MAXPATHLEN, mode)) { 6014 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_ioc_send_client: " 6015 "ioctl <%s> client_path copyout failed", s)); 6016 retval = EFAULT; 6017 } 6018 return (retval); 6019 } 6020 6021 6022 /* 6023 * Routine to translated dev_info pointer (dip) to device pathname. 6024 */ 6025 static void 6026 vhci_ioc_devi_to_path(dev_info_t *dip, caddr_t path) 6027 { 6028 (void) ddi_pathname(dip, path); 6029 } 6030 6031 6032 /* 6033 * vhci_get_phci_path_list: 6034 * get information about devices associated with a 6035 * given PHCI device. 6036 * 6037 * Return Values: 6038 * path information elements 6039 */ 6040 int 6041 vhci_get_phci_path_list(dev_info_t *pdip, sv_path_info_t *pibuf, 6042 uint_t num_elems) 6043 { 6044 uint_t count, done; 6045 mdi_pathinfo_t *pip; 6046 sv_path_info_t *ret_pip; 6047 int status; 6048 size_t prop_size; 6049 int circular; 6050 6051 /* 6052 * Get the PHCI structure and retrieve the path information 6053 * from the GUID hash table. 6054 */ 6055 6056 ret_pip = pibuf; 6057 count = 0; 6058 6059 ndi_devi_enter(pdip, &circular); 6060 6061 done = (count >= num_elems); 6062 pip = mdi_get_next_client_path(pdip, NULL); 6063 while (pip && !done) { 6064 mdi_pi_lock(pip); 6065 (void) ddi_pathname(mdi_pi_get_phci(pip), 6066 ret_pip->device.ret_phci); 6067 (void) strcpy(ret_pip->ret_addr, mdi_pi_get_addr(pip)); 6068 (void) mdi_pi_get_state2(pip, &ret_pip->ret_state, 6069 &ret_pip->ret_ext_state); 6070 6071 status = mdi_prop_size(pip, &prop_size); 6072 if (status == MDI_SUCCESS && ret_pip->ret_prop.ret_buf_size) { 6073 *ret_pip->ret_prop.ret_buf_size = (uint_t)prop_size; 6074 } 6075 6076 #ifdef DEBUG 6077 if (status != MDI_SUCCESS) { 6078 VHCI_DEBUG(2, (CE_WARN, NULL, 6079 "!vhci_get_phci_path_list: " 6080 "phci <%s>, prop size failure 0x%x", 6081 ret_pip->device.ret_phci, status)); 6082 } 6083 #endif /* DEBUG */ 6084 6085 6086 if (status == MDI_SUCCESS && ret_pip->ret_prop.buf && 6087 prop_size && ret_pip->ret_prop.buf_size >= prop_size) { 6088 status = mdi_prop_pack(pip, 6089 &ret_pip->ret_prop.buf, 6090 ret_pip->ret_prop.buf_size); 6091 6092 #ifdef DEBUG 6093 if (status != MDI_SUCCESS) { 6094 VHCI_DEBUG(2, (CE_WARN, NULL, 6095 "!vhci_get_phci_path_list: " 6096 "phci <%s>, prop pack failure 0x%x", 6097 ret_pip->device.ret_phci, status)); 6098 } 6099 #endif /* DEBUG */ 6100 } 6101 6102 mdi_pi_unlock(pip); 6103 pip = mdi_get_next_client_path(pdip, pip); 6104 ret_pip++; 6105 count++; 6106 done = (count >= num_elems); 6107 } 6108 6109 ndi_devi_exit(pdip, circular); 6110 6111 return (MDI_SUCCESS); 6112 } 6113 6114 6115 /* 6116 * vhci_get_client_path_list: 6117 * get information about various paths associated with a 6118 * given client device. 6119 * 6120 * Return Values: 6121 * path information elements 6122 */ 6123 int 6124 vhci_get_client_path_list(dev_info_t *cdip, sv_path_info_t *pibuf, 6125 uint_t num_elems) 6126 { 6127 uint_t count, done; 6128 mdi_pathinfo_t *pip; 6129 sv_path_info_t *ret_pip; 6130 int status; 6131 size_t prop_size; 6132 int circular; 6133 6134 ret_pip = pibuf; 6135 count = 0; 6136 6137 ndi_devi_enter(cdip, &circular); 6138 6139 done = (count >= num_elems); 6140 pip = mdi_get_next_phci_path(cdip, NULL); 6141 while (pip && !done) { 6142 mdi_pi_lock(pip); 6143 (void) ddi_pathname(mdi_pi_get_phci(pip), 6144 ret_pip->device.ret_phci); 6145 (void) strcpy(ret_pip->ret_addr, mdi_pi_get_addr(pip)); 6146 (void) mdi_pi_get_state2(pip, &ret_pip->ret_state, 6147 &ret_pip->ret_ext_state); 6148 6149 status = mdi_prop_size(pip, &prop_size); 6150 if (status == MDI_SUCCESS && ret_pip->ret_prop.ret_buf_size) { 6151 *ret_pip->ret_prop.ret_buf_size = (uint_t)prop_size; 6152 } 6153 6154 #ifdef DEBUG 6155 if (status != MDI_SUCCESS) { 6156 VHCI_DEBUG(2, (CE_WARN, NULL, 6157 "!vhci_get_client_path_list: " 6158 "phci <%s>, prop size failure 0x%x", 6159 ret_pip->device.ret_phci, status)); 6160 } 6161 #endif /* DEBUG */ 6162 6163 6164 if (status == MDI_SUCCESS && ret_pip->ret_prop.buf && 6165 prop_size && ret_pip->ret_prop.buf_size >= prop_size) { 6166 status = mdi_prop_pack(pip, 6167 &ret_pip->ret_prop.buf, 6168 ret_pip->ret_prop.buf_size); 6169 6170 #ifdef DEBUG 6171 if (status != MDI_SUCCESS) { 6172 VHCI_DEBUG(2, (CE_WARN, NULL, 6173 "!vhci_get_client_path_list: " 6174 "phci <%s>, prop pack failure 0x%x", 6175 ret_pip->device.ret_phci, status)); 6176 } 6177 #endif /* DEBUG */ 6178 } 6179 6180 mdi_pi_unlock(pip); 6181 pip = mdi_get_next_phci_path(cdip, pip); 6182 ret_pip++; 6183 count++; 6184 done = (count >= num_elems); 6185 } 6186 6187 ndi_devi_exit(cdip, circular); 6188 6189 return (MDI_SUCCESS); 6190 } 6191 6192 6193 /* 6194 * Routine to get ioctl argument structure from userland. 6195 */ 6196 /* ARGSUSED */ 6197 static int 6198 vhci_get_iocdata(const void *data, sv_iocdata_t *pioc, int mode, caddr_t s) 6199 { 6200 int retval = 0; 6201 6202 #ifdef _MULTI_DATAMODEL 6203 switch (ddi_model_convert_from(mode & FMODELS)) { 6204 case DDI_MODEL_ILP32: 6205 { 6206 sv_iocdata32_t ioc32; 6207 6208 if (ddi_copyin(data, &ioc32, sizeof (ioc32), mode)) { 6209 retval = EFAULT; 6210 break; 6211 } 6212 pioc->client = (caddr_t)(uintptr_t)ioc32.client; 6213 pioc->phci = (caddr_t)(uintptr_t)ioc32.phci; 6214 pioc->addr = (caddr_t)(uintptr_t)ioc32.addr; 6215 pioc->buf_elem = (uint_t)ioc32.buf_elem; 6216 pioc->ret_buf = (sv_path_info_t *)(uintptr_t)ioc32.ret_buf; 6217 pioc->ret_elem = (uint_t *)(uintptr_t)ioc32.ret_elem; 6218 break; 6219 } 6220 6221 case DDI_MODEL_NONE: 6222 if (ddi_copyin(data, pioc, sizeof (*pioc), mode)) { 6223 retval = EFAULT; 6224 break; 6225 } 6226 break; 6227 } 6228 #else /* _MULTI_DATAMODEL */ 6229 if (ddi_copyin(data, pioc, sizeof (*pioc), mode)) { 6230 retval = EFAULT; 6231 } 6232 #endif /* _MULTI_DATAMODEL */ 6233 6234 #ifdef DEBUG 6235 if (retval) { 6236 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_get_ioc: cmd <%s> " 6237 "iocdata copyin failed", s)); 6238 } 6239 #endif 6240 6241 return (retval); 6242 } 6243 6244 6245 /* 6246 * Routine to get the ioctl argument for ioctl causing controller switchover. 6247 */ 6248 /* ARGSUSED */ 6249 static int 6250 vhci_get_iocswitchdata(const void *data, sv_switch_to_cntlr_iocdata_t *piocsc, 6251 int mode, caddr_t s) 6252 { 6253 int retval = 0; 6254 6255 #ifdef _MULTI_DATAMODEL 6256 switch (ddi_model_convert_from(mode & FMODELS)) { 6257 case DDI_MODEL_ILP32: 6258 { 6259 sv_switch_to_cntlr_iocdata32_t ioc32; 6260 6261 if (ddi_copyin(data, &ioc32, sizeof (ioc32), mode)) { 6262 retval = EFAULT; 6263 break; 6264 } 6265 piocsc->client = (caddr_t)(uintptr_t)ioc32.client; 6266 piocsc->class = (caddr_t)(uintptr_t)ioc32.class; 6267 break; 6268 } 6269 6270 case DDI_MODEL_NONE: 6271 if (ddi_copyin(data, piocsc, sizeof (*piocsc), mode)) { 6272 retval = EFAULT; 6273 } 6274 break; 6275 } 6276 #else /* _MULTI_DATAMODEL */ 6277 if (ddi_copyin(data, piocsc, sizeof (*piocsc), mode)) { 6278 retval = EFAULT; 6279 } 6280 #endif /* _MULTI_DATAMODEL */ 6281 6282 #ifdef DEBUG 6283 if (retval) { 6284 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_get_ioc: cmd <%s> " 6285 "switch_to_cntlr_iocdata copyin failed", s)); 6286 } 6287 #endif 6288 6289 return (retval); 6290 } 6291 6292 6293 /* 6294 * Routine to allocate memory for the path information structures. 6295 * It allocates two chunks of memory - one for keeping userland 6296 * pointers/values for path information and path properties, second for 6297 * keeping allocating kernel memory for path properties. These path 6298 * properties are finally copied to userland. 6299 */ 6300 /* ARGSUSED */ 6301 static int 6302 vhci_ioc_alloc_pathinfo(sv_path_info_t **upibuf, sv_path_info_t **kpibuf, 6303 uint_t num_paths, sv_iocdata_t *pioc, int mode, caddr_t s) 6304 { 6305 sv_path_info_t *pi; 6306 uint_t bufsize; 6307 int retval = 0; 6308 int index; 6309 6310 /* Allocate memory */ 6311 *upibuf = (sv_path_info_t *) 6312 kmem_zalloc(sizeof (sv_path_info_t) * num_paths, KM_SLEEP); 6313 ASSERT(*upibuf != NULL); 6314 *kpibuf = (sv_path_info_t *) 6315 kmem_zalloc(sizeof (sv_path_info_t) * num_paths, KM_SLEEP); 6316 ASSERT(*kpibuf != NULL); 6317 6318 /* 6319 * Get the path info structure from the user space. 6320 * We are interested in the following fields: 6321 * - user size of buffer for per path properties. 6322 * - user address of buffer for path info properties. 6323 * - user pointer for returning actual buffer size 6324 * Keep these fields in the 'upibuf' structures. 6325 * Allocate buffer for per path info properties in kernel 6326 * structure ('kpibuf'). 6327 * Size of these buffers will be equal to the size of buffers 6328 * in the user space. 6329 */ 6330 #ifdef _MULTI_DATAMODEL 6331 switch (ddi_model_convert_from(mode & FMODELS)) { 6332 case DDI_MODEL_ILP32: 6333 { 6334 sv_path_info32_t *src; 6335 sv_path_info32_t pi32; 6336 6337 src = (sv_path_info32_t *)pioc->ret_buf; 6338 pi = (sv_path_info_t *)*upibuf; 6339 for (index = 0; index < num_paths; index++, src++, pi++) { 6340 if (ddi_copyin(src, &pi32, sizeof (pi32), mode)) { 6341 retval = EFAULT; 6342 break; 6343 } 6344 6345 pi->ret_prop.buf_size = 6346 (uint_t)pi32.ret_prop.buf_size; 6347 pi->ret_prop.ret_buf_size = 6348 (uint_t *)(uintptr_t)pi32.ret_prop.ret_buf_size; 6349 pi->ret_prop.buf = 6350 (caddr_t)(uintptr_t)pi32.ret_prop.buf; 6351 } 6352 break; 6353 } 6354 6355 case DDI_MODEL_NONE: 6356 if (ddi_copyin(pioc->ret_buf, *upibuf, 6357 sizeof (sv_path_info_t) * num_paths, mode)) { 6358 retval = EFAULT; 6359 } 6360 break; 6361 } 6362 #else /* _MULTI_DATAMODEL */ 6363 if (ddi_copyin(pioc->ret_buf, *upibuf, 6364 sizeof (sv_path_info_t) * num_paths, mode)) { 6365 retval = EFAULT; 6366 } 6367 #endif /* _MULTI_DATAMODEL */ 6368 6369 if (retval != 0) { 6370 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_alloc_path_info: " 6371 "ioctl <%s> normal: path_info copyin failed", s)); 6372 kmem_free(*upibuf, sizeof (sv_path_info_t) * num_paths); 6373 kmem_free(*kpibuf, sizeof (sv_path_info_t) * num_paths); 6374 *upibuf = NULL; 6375 *kpibuf = NULL; 6376 return (retval); 6377 } 6378 6379 /* 6380 * Allocate memory for per path properties. 6381 */ 6382 for (index = 0, pi = *kpibuf; index < num_paths; index++, pi++) { 6383 bufsize = (*upibuf)[index].ret_prop.buf_size; 6384 6385 if (bufsize && bufsize <= SV_PROP_MAX_BUF_SIZE) { 6386 pi->ret_prop.buf_size = bufsize; 6387 pi->ret_prop.buf = (caddr_t) 6388 kmem_zalloc(bufsize, KM_SLEEP); 6389 ASSERT(pi->ret_prop.buf != NULL); 6390 } else { 6391 pi->ret_prop.buf_size = 0; 6392 pi->ret_prop.buf = NULL; 6393 } 6394 6395 if ((*upibuf)[index].ret_prop.ret_buf_size != NULL) { 6396 pi->ret_prop.ret_buf_size = (uint_t *)kmem_zalloc( 6397 sizeof (*pi->ret_prop.ret_buf_size), KM_SLEEP); 6398 ASSERT(pi->ret_prop.ret_buf_size != NULL); 6399 } else { 6400 pi->ret_prop.ret_buf_size = NULL; 6401 } 6402 } 6403 6404 return (0); 6405 } 6406 6407 6408 /* 6409 * Routine to free memory for the path information structures. 6410 * This is the memory which was allocated earlier. 6411 */ 6412 /* ARGSUSED */ 6413 static void 6414 vhci_ioc_free_pathinfo(sv_path_info_t *upibuf, sv_path_info_t *kpibuf, 6415 uint_t num_paths) 6416 { 6417 sv_path_info_t *pi; 6418 int index; 6419 6420 /* Free memory for per path properties */ 6421 for (index = 0, pi = kpibuf; index < num_paths; index++, pi++) { 6422 if (pi->ret_prop.ret_buf_size != NULL) { 6423 kmem_free(pi->ret_prop.ret_buf_size, 6424 sizeof (*pi->ret_prop.ret_buf_size)); 6425 } 6426 6427 if (pi->ret_prop.buf != NULL) { 6428 kmem_free(pi->ret_prop.buf, pi->ret_prop.buf_size); 6429 } 6430 } 6431 6432 /* Free memory for path info structures */ 6433 kmem_free(upibuf, sizeof (sv_path_info_t) * num_paths); 6434 kmem_free(kpibuf, sizeof (sv_path_info_t) * num_paths); 6435 } 6436 6437 6438 /* 6439 * Routine to copy path information and path properties to userland. 6440 */ 6441 /* ARGSUSED */ 6442 static int 6443 vhci_ioc_send_pathinfo(sv_path_info_t *upibuf, sv_path_info_t *kpibuf, 6444 uint_t num_paths, sv_iocdata_t *pioc, int mode, caddr_t s) 6445 { 6446 int retval = 0, index; 6447 sv_path_info_t *upi_ptr; 6448 sv_path_info32_t *upi32_ptr; 6449 6450 #ifdef _MULTI_DATAMODEL 6451 switch (ddi_model_convert_from(mode & FMODELS)) { 6452 case DDI_MODEL_ILP32: 6453 goto copy_32bit; 6454 6455 case DDI_MODEL_NONE: 6456 goto copy_normal; 6457 } 6458 #else /* _MULTI_DATAMODEL */ 6459 6460 goto copy_normal; 6461 6462 #endif /* _MULTI_DATAMODEL */ 6463 6464 copy_normal: 6465 6466 /* 6467 * Copy path information and path properties to user land. 6468 * Pointer fields inside the path property structure were 6469 * saved in the 'upibuf' structure earlier. 6470 */ 6471 upi_ptr = pioc->ret_buf; 6472 for (index = 0; index < num_paths; index++) { 6473 if (ddi_copyout(kpibuf[index].device.ret_ct, 6474 upi_ptr[index].device.ret_ct, MAXPATHLEN, mode)) { 6475 retval = EFAULT; 6476 break; 6477 } 6478 6479 if (ddi_copyout(kpibuf[index].ret_addr, 6480 upi_ptr[index].ret_addr, MAXNAMELEN, mode)) { 6481 retval = EFAULT; 6482 break; 6483 } 6484 6485 if (ddi_copyout(&kpibuf[index].ret_state, 6486 &upi_ptr[index].ret_state, sizeof (kpibuf[index].ret_state), 6487 mode)) { 6488 retval = EFAULT; 6489 break; 6490 } 6491 6492 if (ddi_copyout(&kpibuf[index].ret_ext_state, 6493 &upi_ptr[index].ret_ext_state, 6494 sizeof (kpibuf[index].ret_ext_state), mode)) { 6495 retval = EFAULT; 6496 break; 6497 } 6498 6499 if ((kpibuf[index].ret_prop.ret_buf_size != NULL) && 6500 ddi_copyout(kpibuf[index].ret_prop.ret_buf_size, 6501 upibuf[index].ret_prop.ret_buf_size, 6502 sizeof (*upibuf[index].ret_prop.ret_buf_size), mode)) { 6503 retval = EFAULT; 6504 break; 6505 } 6506 6507 if ((kpibuf[index].ret_prop.buf != NULL) && 6508 ddi_copyout(kpibuf[index].ret_prop.buf, 6509 upibuf[index].ret_prop.buf, 6510 upibuf[index].ret_prop.buf_size, mode)) { 6511 retval = EFAULT; 6512 break; 6513 } 6514 } 6515 6516 #ifdef DEBUG 6517 if (retval) { 6518 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_get_ioc: ioctl <%s> " 6519 "normal: path_info copyout failed", s)); 6520 } 6521 #endif 6522 6523 return (retval); 6524 6525 copy_32bit: 6526 /* 6527 * Copy path information and path properties to user land. 6528 * Pointer fields inside the path property structure were 6529 * saved in the 'upibuf' structure earlier. 6530 */ 6531 upi32_ptr = (sv_path_info32_t *)pioc->ret_buf; 6532 for (index = 0; index < num_paths; index++) { 6533 if (ddi_copyout(kpibuf[index].device.ret_ct, 6534 upi32_ptr[index].device.ret_ct, MAXPATHLEN, mode)) { 6535 retval = EFAULT; 6536 break; 6537 } 6538 6539 if (ddi_copyout(kpibuf[index].ret_addr, 6540 upi32_ptr[index].ret_addr, MAXNAMELEN, mode)) { 6541 retval = EFAULT; 6542 break; 6543 } 6544 6545 if (ddi_copyout(&kpibuf[index].ret_state, 6546 &upi32_ptr[index].ret_state, 6547 sizeof (kpibuf[index].ret_state), mode)) { 6548 retval = EFAULT; 6549 break; 6550 } 6551 6552 if (ddi_copyout(&kpibuf[index].ret_ext_state, 6553 &upi32_ptr[index].ret_ext_state, 6554 sizeof (kpibuf[index].ret_ext_state), mode)) { 6555 retval = EFAULT; 6556 break; 6557 } 6558 if ((kpibuf[index].ret_prop.ret_buf_size != NULL) && 6559 ddi_copyout(kpibuf[index].ret_prop.ret_buf_size, 6560 upibuf[index].ret_prop.ret_buf_size, 6561 sizeof (*upibuf[index].ret_prop.ret_buf_size), mode)) { 6562 retval = EFAULT; 6563 break; 6564 } 6565 6566 if ((kpibuf[index].ret_prop.buf != NULL) && 6567 ddi_copyout(kpibuf[index].ret_prop.buf, 6568 upibuf[index].ret_prop.buf, 6569 upibuf[index].ret_prop.buf_size, mode)) { 6570 retval = EFAULT; 6571 break; 6572 } 6573 } 6574 6575 #ifdef DEBUG 6576 if (retval) { 6577 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_get_ioc: ioctl <%s> " 6578 "normal: path_info copyout failed", s)); 6579 } 6580 #endif 6581 6582 return (retval); 6583 } 6584 6585 6586 /* 6587 * vhci_failover() 6588 * This routine expects VHCI_HOLD_LUN before being invoked. It can be invoked 6589 * as MDI_FAILOVER_ASYNC or MDI_FAILOVER_SYNC. For Asynchronous failovers 6590 * this routine shall VHCI_RELEASE_LUN on exiting. For synchronous failovers 6591 * it is the callers responsibility to release lun. 6592 */ 6593 6594 /* ARGSUSED */ 6595 static int 6596 vhci_failover(dev_info_t *vdip, dev_info_t *cdip, int flags) 6597 { 6598 char *guid; 6599 scsi_vhci_lun_t *vlun = NULL; 6600 struct scsi_vhci *vhci; 6601 mdi_pathinfo_t *pip, *npip; 6602 char *s_pclass, *pclass1, *pclass2, *pclass; 6603 char active_pclass_copy[255], *active_pclass_ptr; 6604 char *ptr1, *ptr2; 6605 mdi_pathinfo_state_t pi_state; 6606 uint32_t pi_ext_state; 6607 scsi_vhci_priv_t *svp; 6608 struct scsi_device *sd; 6609 struct scsi_failover_ops *sfo; 6610 int sps; /* mdi_select_path() status */ 6611 int activation_done = 0; 6612 int rval, retval = MDI_FAILURE; 6613 int reserve_pending, check_condition, UA_condition; 6614 struct scsi_pkt *pkt; 6615 struct buf *bp; 6616 6617 vhci = ddi_get_soft_state(vhci_softstate, ddi_get_instance(vdip)); 6618 sd = ddi_get_driver_private(cdip); 6619 vlun = ADDR2VLUN(&sd->sd_address); 6620 ASSERT(vlun != 0); 6621 ASSERT(VHCI_LUN_IS_HELD(vlun)); 6622 guid = vlun->svl_lun_wwn; 6623 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_failover(1): guid %s\n", guid)); 6624 vhci_log(CE_NOTE, vdip, "!Initiating failover for device %s " 6625 "(GUID %s)", ddi_node_name(cdip), guid); 6626 6627 /* 6628 * Lets maintain a local copy of the vlun->svl_active_pclass 6629 * for the rest of the processing. Accessing the field 6630 * directly in the loop below causes loop logic to break 6631 * especially when the field gets updated by other threads 6632 * update path status etc and causes 'paths are not currently 6633 * available' condition to be declared prematurely. 6634 */ 6635 mutex_enter(&vlun->svl_mutex); 6636 if (vlun->svl_active_pclass != NULL) { 6637 (void) strlcpy(active_pclass_copy, vlun->svl_active_pclass, 6638 sizeof (active_pclass_copy)); 6639 active_pclass_ptr = &active_pclass_copy[0]; 6640 mutex_exit(&vlun->svl_mutex); 6641 if (vhci_quiesce_paths(vdip, cdip, vlun, guid, 6642 active_pclass_ptr) != 0) { 6643 retval = MDI_FAILURE; 6644 } 6645 } else { 6646 /* 6647 * can happen only when the available path to device 6648 * discovered is a STANDBY path. 6649 */ 6650 mutex_exit(&vlun->svl_mutex); 6651 active_pclass_copy[0] = '\0'; 6652 active_pclass_ptr = NULL; 6653 } 6654 6655 sfo = vlun->svl_fops; 6656 ASSERT(sfo != NULL); 6657 pclass1 = s_pclass = active_pclass_ptr; 6658 VHCI_DEBUG(1, (CE_NOTE, NULL, "!(%s)failing over from %s\n", guid, 6659 (s_pclass == NULL ? "<none>" : s_pclass))); 6660 6661 next_pathclass: 6662 6663 rval = (*sfo->sfo_pathclass_next)(pclass1, &pclass2, 6664 vlun->svl_fops_ctpriv); 6665 if (rval == ENOENT) { 6666 if (s_pclass == NULL) { 6667 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_failover(4)(%s): " 6668 "failed, no more pathclasses\n", guid)); 6669 goto done; 6670 } else { 6671 (*sfo->sfo_pathclass_next)(NULL, &pclass2, 6672 vlun->svl_fops_ctpriv); 6673 } 6674 } else if (rval == EINVAL) { 6675 vhci_log(CE_NOTE, vdip, "!Failover operation failed for " 6676 "device %s (GUID %s): Invalid path-class %s", 6677 ddi_node_name(cdip), guid, 6678 ((pclass1 == NULL) ? "<none>" : pclass1)); 6679 goto done; 6680 } 6681 if ((s_pclass != NULL) && (strcmp(pclass2, s_pclass) == 0)) { 6682 /* 6683 * paths are not currently available 6684 */ 6685 vhci_log(CE_NOTE, vdip, "!Failover path currently unavailable" 6686 " for device %s (GUID %s)", 6687 ddi_node_name(cdip), guid); 6688 goto done; 6689 } 6690 pip = npip = NULL; 6691 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_failover(5.2)(%s): considering " 6692 "%s as failover destination\n", guid, pclass2)); 6693 sps = mdi_select_path(cdip, NULL, MDI_SELECT_STANDBY_PATH, NULL, &npip); 6694 if ((npip == NULL) || (sps != MDI_SUCCESS)) { 6695 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_failover(%s): no " 6696 "STANDBY paths found (status:%x)!\n", guid, sps)); 6697 pclass1 = pclass2; 6698 goto next_pathclass; 6699 } 6700 do { 6701 pclass = NULL; 6702 if ((mdi_prop_lookup_string(npip, "path-class", 6703 &pclass) != MDI_SUCCESS) || (strcmp(pclass2, 6704 pclass) != 0)) { 6705 VHCI_DEBUG(1, (CE_NOTE, NULL, 6706 "!vhci_failover(5.5)(%s): skipping path " 6707 "%p(%s)...\n", guid, (void *)npip, pclass)); 6708 pip = npip; 6709 sps = mdi_select_path(cdip, NULL, 6710 MDI_SELECT_STANDBY_PATH, pip, &npip); 6711 mdi_rele_path(pip); 6712 (void) mdi_prop_free(pclass); 6713 continue; 6714 } 6715 svp = (scsi_vhci_priv_t *)mdi_pi_get_vhci_private(npip); 6716 6717 /* 6718 * Issue READ at non-zer block on this STANDBY path. 6719 * Purple returns 6720 * 1. RESERVATION_CONFLICT if reservation is pending 6721 * 2. POR check condition if it reset happened. 6722 * 2. failover Check Conditions if one is already in progress. 6723 */ 6724 reserve_pending = 0; 6725 check_condition = 0; 6726 UA_condition = 0; 6727 6728 bp = scsi_alloc_consistent_buf(&svp->svp_psd->sd_address, 6729 (struct buf *)NULL, DEV_BSIZE, B_READ, NULL, NULL); 6730 if (!bp) { 6731 VHCI_DEBUG(1, (CE_NOTE, NULL, 6732 "vhci_failover !No resources (buf)\n")); 6733 mdi_rele_path(npip); 6734 goto done; 6735 } 6736 pkt = scsi_init_pkt(&svp->svp_psd->sd_address, NULL, bp, 6737 CDB_GROUP1, sizeof (struct scsi_arq_status), 0, 6738 PKT_CONSISTENT, NULL, NULL); 6739 if (pkt) { 6740 (void) scsi_setup_cdb((union scsi_cdb *)(uintptr_t) 6741 pkt->pkt_cdbp, SCMD_READ, 1, 1, 0); 6742 pkt->pkt_flags = FLAG_NOINTR; 6743 check_path_again: 6744 pkt->pkt_time = 3*30; 6745 if (scsi_transport(pkt) == TRAN_ACCEPT) { 6746 switch (pkt->pkt_reason) { 6747 case CMD_CMPLT: 6748 switch (SCBP_C(pkt)) { 6749 case STATUS_GOOD: 6750 /* Already failed over */ 6751 activation_done = 1; 6752 break; 6753 case STATUS_RESERVATION_CONFLICT: 6754 reserve_pending = 1; 6755 break; 6756 case STATUS_CHECK: 6757 check_condition = 1; 6758 break; 6759 } 6760 } 6761 } 6762 if (check_condition && 6763 (pkt->pkt_state & STATE_ARQ_DONE)) { 6764 struct scsi_extended_sense *sns = 6765 &(((struct scsi_arq_status *)(uintptr_t) 6766 (pkt->pkt_scbp))->sts_sensedata); 6767 if (sns->es_key == KEY_UNIT_ATTENTION && 6768 sns->es_add_code == 0x29) { 6769 /* Already failed over */ 6770 VHCI_DEBUG(1, (CE_NOTE, NULL, 6771 "!vhci_failover(7)(%s): " 6772 "path 0x%p POR UA condition\n", 6773 guid, (void *)npip)); 6774 if (UA_condition == 0) { 6775 UA_condition = 1; 6776 goto check_path_again; 6777 } 6778 } else { 6779 activation_done = 0; 6780 VHCI_DEBUG(1, (CE_NOTE, NULL, 6781 "!vhci_failover(%s): path 0x%p " 6782 "unhandled chkcond %x %x %x\n", 6783 guid, (void *)npip, sns->es_key, 6784 sns->es_add_code, 6785 sns->es_qual_code)); 6786 } 6787 } 6788 scsi_destroy_pkt(pkt); 6789 } 6790 scsi_free_consistent_buf(bp); 6791 6792 if (activation_done) { 6793 mdi_rele_path(npip); 6794 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_failover(7)(%s): " 6795 "path 0x%p already failedover\n", guid, 6796 (void *)npip)); 6797 break; 6798 } 6799 if (reserve_pending && (vlun->svl_xlf_capable == 0)) { 6800 (void) vhci_recovery_reset(vlun, 6801 &svp->svp_psd->sd_address, 6802 FALSE, VHCI_DEPTH_ALL); 6803 } 6804 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_failover(6)(%s): " 6805 "activating path 0x%p(psd:%p)\n", guid, (void *)npip, 6806 (void *)svp->svp_psd)); 6807 if ((*sfo->sfo_path_activate)(svp->svp_psd, pclass2, 6808 vlun->svl_fops_ctpriv) == 0) { 6809 activation_done = 1; 6810 mdi_rele_path(npip); 6811 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_failover(7)(%s): " 6812 "path 0x%p successfully activated\n", guid, 6813 (void *)npip)); 6814 break; 6815 } 6816 pip = npip; 6817 sps = mdi_select_path(cdip, NULL, MDI_SELECT_STANDBY_PATH, 6818 pip, &npip); 6819 mdi_rele_path(pip); 6820 } while ((npip != NULL) && (sps == MDI_SUCCESS)); 6821 if (activation_done == 0) { 6822 pclass1 = pclass2; 6823 goto next_pathclass; 6824 } 6825 6826 /* 6827 * if we are here, we have succeeded in activating path npip of 6828 * pathclass pclass2; let us validate all paths of pclass2 by 6829 * "ping"-ing each one and mark the good ones ONLINE 6830 * Also, set the state of the paths belonging to the previously 6831 * active pathclass to STANDBY 6832 */ 6833 pip = npip = NULL; 6834 sps = mdi_select_path(cdip, NULL, (MDI_SELECT_ONLINE_PATH | 6835 MDI_SELECT_STANDBY_PATH | MDI_SELECT_USER_DISABLE_PATH), 6836 NULL, &npip); 6837 if (npip == NULL || sps != MDI_SUCCESS) { 6838 VHCI_DEBUG(1, (CE_NOTE, NULL, "!Failover operation failed for " 6839 "device %s (GUID %s): paths may be busy\n", 6840 ddi_node_name(cdip), guid)); 6841 goto done; 6842 } 6843 do { 6844 (void) mdi_pi_get_state2(npip, &pi_state, &pi_ext_state); 6845 if (mdi_prop_lookup_string(npip, "path-class", &pclass) 6846 != MDI_SUCCESS) { 6847 pip = npip; 6848 sps = mdi_select_path(cdip, NULL, 6849 (MDI_SELECT_ONLINE_PATH | 6850 MDI_SELECT_STANDBY_PATH | 6851 MDI_SELECT_USER_DISABLE_PATH), 6852 pip, &npip); 6853 mdi_rele_path(pip); 6854 continue; 6855 } 6856 if (strcmp(pclass, pclass2) == 0) { 6857 if (pi_state == MDI_PATHINFO_STATE_STANDBY) { 6858 svp = (scsi_vhci_priv_t *) 6859 mdi_pi_get_vhci_private(npip); 6860 VHCI_DEBUG(1, (CE_NOTE, NULL, 6861 "!vhci_failover(8)(%s): " 6862 "pinging path 0x%p\n", 6863 guid, (void *)npip)); 6864 if ((*sfo->sfo_path_ping)(svp->svp_psd, 6865 vlun->svl_fops_ctpriv) == 1) { 6866 mdi_pi_set_state(npip, 6867 MDI_PATHINFO_STATE_ONLINE); 6868 VHCI_DEBUG(1, (CE_NOTE, NULL, 6869 "!vhci_failover(9)(%s): " 6870 "path 0x%p ping successful, " 6871 "marked online\n", guid, 6872 (void *)npip)); 6873 MDI_PI_ERRSTAT(npip, MDI_PI_FAILTO); 6874 } 6875 } 6876 } else if ((s_pclass != NULL) && (strcmp(pclass, s_pclass) 6877 == 0)) { 6878 if (pi_state == MDI_PATHINFO_STATE_ONLINE) { 6879 mdi_pi_set_state(npip, 6880 MDI_PATHINFO_STATE_STANDBY); 6881 VHCI_DEBUG(1, (CE_NOTE, NULL, 6882 "!vhci_failover(10)(%s): path 0x%p marked " 6883 "STANDBY\n", guid, (void *)npip)); 6884 MDI_PI_ERRSTAT(npip, MDI_PI_FAILFROM); 6885 } 6886 } 6887 (void) mdi_prop_free(pclass); 6888 pip = npip; 6889 sps = mdi_select_path(cdip, NULL, (MDI_SELECT_ONLINE_PATH | 6890 MDI_SELECT_STANDBY_PATH|MDI_SELECT_USER_DISABLE_PATH), 6891 pip, &npip); 6892 mdi_rele_path(pip); 6893 } while ((npip != NULL) && (sps == MDI_SUCCESS)); 6894 6895 /* 6896 * Update the AccessState of related MP-API TPGs 6897 */ 6898 (void) vhci_mpapi_update_tpg_acc_state_for_lu(vhci, vlun); 6899 6900 vhci_log(CE_NOTE, vdip, "!Failover operation completed successfully " 6901 "for device %s (GUID %s): failed over from %s to %s", 6902 ddi_node_name(cdip), guid, ((s_pclass == NULL) ? "<none>" : 6903 s_pclass), pclass2); 6904 ptr1 = kmem_alloc(strlen(pclass2)+1, KM_SLEEP); 6905 (void) strlcpy(ptr1, pclass2, (strlen(pclass2)+1)); 6906 mutex_enter(&vlun->svl_mutex); 6907 ptr2 = vlun->svl_active_pclass; 6908 vlun->svl_active_pclass = ptr1; 6909 mutex_exit(&vlun->svl_mutex); 6910 if (ptr2) { 6911 kmem_free(ptr2, strlen(ptr2)+1); 6912 } 6913 mutex_enter(&vhci->vhci_mutex); 6914 scsi_hba_reset_notify_callback(&vhci->vhci_mutex, 6915 &vhci->vhci_reset_notify_listf); 6916 /* All reservations are cleared upon these resets. */ 6917 vlun->svl_flags &= ~VLUN_RESERVE_ACTIVE_FLG; 6918 mutex_exit(&vhci->vhci_mutex); 6919 VHCI_DEBUG(1, (CE_NOTE, NULL, "!vhci_failover(11): DONE! Active " 6920 "pathclass for %s is now %s\n", guid, pclass2)); 6921 retval = MDI_SUCCESS; 6922 6923 done: 6924 if (flags == MDI_FAILOVER_ASYNC) { 6925 VHCI_RELEASE_LUN(vlun); 6926 VHCI_DEBUG(6, (CE_NOTE, NULL, "!vhci_failover(12): DONE! " 6927 "releasing lun, as failover was ASYNC\n")); 6928 } else { 6929 VHCI_DEBUG(6, (CE_NOTE, NULL, "!vhci_failover(12): DONE! " 6930 "NOT releasing lun, as failover was SYNC\n")); 6931 } 6932 return (retval); 6933 } 6934 6935 /* 6936 * vhci_client_attached is called after the successful attach of a 6937 * client devinfo node. 6938 */ 6939 static void 6940 vhci_client_attached(dev_info_t *cdip) 6941 { 6942 mdi_pathinfo_t *pip; 6943 int circular; 6944 6945 /* 6946 * At this point the client has attached and it's instance number is 6947 * valid, so we can set up kstats. We need to do this here because it 6948 * is possible for paths to go online prior to client attach, in which 6949 * case the call to vhci_kstat_create_pathinfo in vhci_pathinfo_online 6950 * was a noop. 6951 */ 6952 ndi_devi_enter(cdip, &circular); 6953 for (pip = mdi_get_next_phci_path(cdip, NULL); pip; 6954 pip = mdi_get_next_phci_path(cdip, pip)) 6955 vhci_kstat_create_pathinfo(pip); 6956 ndi_devi_exit(cdip, circular); 6957 } 6958 6959 /* 6960 * quiesce all of the online paths 6961 */ 6962 static int 6963 vhci_quiesce_paths(dev_info_t *vdip, dev_info_t *cdip, scsi_vhci_lun_t *vlun, 6964 char *guid, char *active_pclass_ptr) 6965 { 6966 scsi_vhci_priv_t *svp; 6967 char *s_pclass = NULL; 6968 mdi_pathinfo_t *npip, *pip; 6969 int sps; 6970 6971 /* quiesce currently active paths */ 6972 s_pclass = NULL; 6973 pip = npip = NULL; 6974 sps = mdi_select_path(cdip, NULL, MDI_SELECT_ONLINE_PATH, NULL, &npip); 6975 if ((npip == NULL) || (sps != MDI_SUCCESS)) { 6976 return (1); 6977 } 6978 do { 6979 if (mdi_prop_lookup_string(npip, "path-class", 6980 &s_pclass) != MDI_SUCCESS) { 6981 mdi_rele_path(npip); 6982 vhci_log(CE_NOTE, vdip, "!Failover operation failed " 6983 "for device %s (GUID %s) due to an internal " 6984 "error", ddi_node_name(cdip), guid); 6985 return (1); 6986 } 6987 if (strcmp(s_pclass, active_pclass_ptr) == 0) { 6988 /* 6989 * quiesce path. Free s_pclass since 6990 * we don't need it anymore 6991 */ 6992 VHCI_DEBUG(1, (CE_NOTE, NULL, 6993 "!vhci_failover(2)(%s): failing over " 6994 "from %s; quiescing path %p\n", 6995 guid, s_pclass, (void *)npip)); 6996 (void) mdi_prop_free(s_pclass); 6997 svp = (scsi_vhci_priv_t *) 6998 mdi_pi_get_vhci_private(npip); 6999 if (svp == NULL) { 7000 VHCI_DEBUG(1, (CE_NOTE, NULL, 7001 "!vhci_failover(2.5)(%s): no " 7002 "client priv! %p offlined?\n", 7003 guid, (void *)npip)); 7004 pip = npip; 7005 sps = mdi_select_path(cdip, NULL, 7006 MDI_SELECT_ONLINE_PATH, pip, &npip); 7007 mdi_rele_path(pip); 7008 continue; 7009 } 7010 if (scsi_abort(&svp->svp_psd->sd_address, NULL) 7011 == 0) { 7012 (void) vhci_recovery_reset(vlun, 7013 &svp->svp_psd->sd_address, FALSE, 7014 VHCI_DEPTH_TARGET); 7015 } 7016 mutex_enter(&svp->svp_mutex); 7017 if (svp->svp_cmds == 0) { 7018 VHCI_DEBUG(1, (CE_NOTE, NULL, 7019 "!vhci_failover(3)(%s):" 7020 "quiesced path %p\n", guid, (void *)npip)); 7021 } else { 7022 while (svp->svp_cmds != 0) { 7023 cv_wait(&svp->svp_cv, &svp->svp_mutex); 7024 VHCI_DEBUG(1, (CE_NOTE, NULL, 7025 "!vhci_failover(3.cv)(%s):" 7026 "quiesced path %p\n", guid, 7027 (void *)npip)); 7028 } 7029 } 7030 mutex_exit(&svp->svp_mutex); 7031 } else { 7032 /* 7033 * make sure we freeup the memory 7034 */ 7035 (void) mdi_prop_free(s_pclass); 7036 } 7037 pip = npip; 7038 sps = mdi_select_path(cdip, NULL, MDI_SELECT_ONLINE_PATH, 7039 pip, &npip); 7040 mdi_rele_path(pip); 7041 } while ((npip != NULL) && (sps == MDI_SUCCESS)); 7042 return (0); 7043 } 7044 7045 static struct scsi_vhci_lun * 7046 vhci_lun_lookup(dev_info_t *tgt_dip) 7047 { 7048 return ((struct scsi_vhci_lun *) 7049 mdi_client_get_vhci_private(tgt_dip)); 7050 } 7051 7052 static struct scsi_vhci_lun * 7053 vhci_lun_lookup_alloc(dev_info_t *tgt_dip, char *guid, int *didalloc) 7054 { 7055 struct scsi_vhci_lun *svl; 7056 7057 if (svl = vhci_lun_lookup(tgt_dip)) { 7058 return (svl); 7059 } 7060 7061 svl = kmem_zalloc(sizeof (*svl), KM_SLEEP); 7062 svl->svl_lun_wwn = kmem_zalloc(strlen(guid)+1, KM_SLEEP); 7063 (void) strcpy(svl->svl_lun_wwn, guid); 7064 mutex_init(&svl->svl_mutex, NULL, MUTEX_DRIVER, NULL); 7065 cv_init(&svl->svl_cv, NULL, CV_DRIVER, NULL); 7066 sema_init(&svl->svl_pgr_sema, 1, NULL, SEMA_DRIVER, NULL); 7067 svl->svl_waiting_for_activepath = 1; 7068 svl->svl_sector_size = 1; 7069 mdi_client_set_vhci_private(tgt_dip, svl); 7070 *didalloc = 1; 7071 VHCI_DEBUG(1, (CE_NOTE, NULL, 7072 "vhci_lun_lookup_alloc: guid %s vlun 0x%p\n", 7073 guid, (void *)svl)); 7074 return (svl); 7075 } 7076 7077 static void 7078 vhci_lun_free(dev_info_t *tgt_dip) 7079 { 7080 struct scsi_vhci_lun *dvlp; 7081 char *guid; 7082 struct scsi_device *sd; 7083 7084 /* 7085 * The scsi_device was set to driver private during child node 7086 * initialization in the scsi_hba_bus_ctl(). 7087 */ 7088 sd = (struct scsi_device *)ddi_get_driver_private(tgt_dip); 7089 7090 dvlp = (struct scsi_vhci_lun *) 7091 mdi_client_get_vhci_private(tgt_dip); 7092 ASSERT(dvlp != NULL); 7093 7094 mdi_client_set_vhci_private(tgt_dip, NULL); 7095 7096 guid = dvlp->svl_lun_wwn; 7097 ASSERT(guid != NULL); 7098 VHCI_DEBUG(4, (CE_NOTE, NULL, "!vhci_lun_free: %s\n", guid)); 7099 7100 mutex_enter(&dvlp->svl_mutex); 7101 if (dvlp->svl_active_pclass != NULL) { 7102 kmem_free(dvlp->svl_active_pclass, 7103 strlen(dvlp->svl_active_pclass)+1); 7104 } 7105 dvlp->svl_active_pclass = NULL; 7106 mutex_exit(&dvlp->svl_mutex); 7107 7108 if (dvlp->svl_lun_wwn != NULL) { 7109 kmem_free(dvlp->svl_lun_wwn, strlen(dvlp->svl_lun_wwn)+1); 7110 } 7111 dvlp->svl_lun_wwn = NULL; 7112 7113 if (dvlp->svl_fops_name) { 7114 kmem_free(dvlp->svl_fops_name, strlen(dvlp->svl_fops_name)+1); 7115 } 7116 dvlp->svl_fops_name = NULL; 7117 7118 if (dvlp->svl_flags & VLUN_TASK_D_ALIVE_FLG) 7119 taskq_destroy(dvlp->svl_taskq); 7120 7121 mutex_destroy(&dvlp->svl_mutex); 7122 cv_destroy(&dvlp->svl_cv); 7123 sema_destroy(&dvlp->svl_pgr_sema); 7124 kmem_free(dvlp, sizeof (*dvlp)); 7125 /* 7126 * vhci_lun_free may be called before the tgt_dip 7127 * initialization so check if the sd is NULL. 7128 */ 7129 if (sd != NULL) 7130 sd->sd_address.a_hba_tran->tran_tgt_private = NULL; 7131 } 7132 7133 7134 int 7135 vhci_do_scsi_cmd(struct scsi_pkt *pkt) 7136 { 7137 int err = 0; 7138 int retry_cnt = 0; 7139 struct scsi_extended_sense *sns; 7140 7141 retry: 7142 err = scsi_poll(pkt); 7143 if (err) { 7144 if (pkt->pkt_cdbp[0] == SCMD_RELEASE) { 7145 if (SCBP_C(pkt) == STATUS_RESERVATION_CONFLICT) { 7146 VHCI_DEBUG(1, (CE_NOTE, NULL, 7147 "!v_s_do_s_c: RELEASE conflict\n")); 7148 return (0); 7149 } 7150 } 7151 if (retry_cnt++ < 3) { 7152 VHCI_DEBUG(1, (CE_WARN, NULL, 7153 "!v_s_do_s_c:retry packet 0x%p " 7154 "status 0x%x reason %s", 7155 (void *)pkt, SCBP_C(pkt), 7156 scsi_rname(pkt->pkt_reason))); 7157 if ((pkt->pkt_reason == CMD_CMPLT) && 7158 (SCBP_C(pkt) == STATUS_CHECK) && 7159 (pkt->pkt_state & STATE_ARQ_DONE)) { 7160 sns = &(((struct scsi_arq_status *)(uintptr_t) 7161 (pkt->pkt_scbp))->sts_sensedata); 7162 VHCI_DEBUG(1, (CE_WARN, NULL, 7163 "!v_s_do_s_c:retry " 7164 "packet 0x%p sense data %s", (void *)pkt, 7165 scsi_sname(sns->es_key))); 7166 } 7167 goto retry; 7168 } 7169 VHCI_DEBUG(1, (CE_WARN, NULL, 7170 "!v_s_do_s_c: failed transport 0x%p 0x%x", 7171 (void *)pkt, SCBP_C(pkt))); 7172 return (0); 7173 } 7174 7175 switch (pkt->pkt_reason) { 7176 case CMD_TIMEOUT: 7177 VHCI_DEBUG(1, (CE_WARN, NULL, "!pkt timed " 7178 "out (pkt 0x%p)", (void *)pkt)); 7179 return (0); 7180 case CMD_CMPLT: 7181 switch (SCBP_C(pkt)) { 7182 case STATUS_GOOD: 7183 break; 7184 case STATUS_CHECK: 7185 if (pkt->pkt_state & STATE_ARQ_DONE) { 7186 sns = &((( 7187 struct scsi_arq_status *) 7188 (uintptr_t) 7189 (pkt->pkt_scbp))-> 7190 sts_sensedata); 7191 if ((sns->es_key == 7192 KEY_UNIT_ATTENTION) || 7193 (sns->es_key == 7194 KEY_NOT_READY)) { 7195 /* 7196 * clear unit attn. 7197 */ 7198 7199 VHCI_DEBUG(1, 7200 (CE_WARN, NULL, 7201 "!v_s_do_s_c: " 7202 "retry " 7203 "packet 0x%p sense " 7204 "data %s", 7205 (void *)pkt, 7206 scsi_sname 7207 (sns->es_key))); 7208 goto retry; 7209 } 7210 VHCI_DEBUG(4, (CE_WARN, NULL, 7211 "!ARQ while " 7212 "transporting " 7213 "(pkt 0x%p)", 7214 (void *)pkt)); 7215 return (0); 7216 } 7217 return (0); 7218 default: 7219 VHCI_DEBUG(1, (CE_WARN, NULL, 7220 "!Bad status returned " 7221 "(pkt 0x%p, status %x)", 7222 (void *)pkt, SCBP_C(pkt))); 7223 return (0); 7224 } 7225 break; 7226 case CMD_INCOMPLETE: 7227 case CMD_RESET: 7228 case CMD_ABORTED: 7229 case CMD_TRAN_ERR: 7230 if (retry_cnt++ < 1) { 7231 VHCI_DEBUG(1, (CE_WARN, NULL, 7232 "!v_s_do_s_c: retry packet 0x%p %s", 7233 (void *)pkt, scsi_rname(pkt->pkt_reason))); 7234 goto retry; 7235 } 7236 /* FALLTHROUGH */ 7237 default: 7238 VHCI_DEBUG(1, (CE_WARN, NULL, "!pkt did not " 7239 "complete successfully (pkt 0x%p," 7240 "reason %x)", (void *)pkt, pkt->pkt_reason)); 7241 return (0); 7242 } 7243 return (1); 7244 } 7245 7246 static int 7247 vhci_quiesce_lun(struct scsi_vhci_lun *vlun) 7248 { 7249 mdi_pathinfo_t *pip, *spip; 7250 dev_info_t *cdip; 7251 struct scsi_vhci_priv *svp; 7252 mdi_pathinfo_state_t pstate; 7253 uint32_t p_ext_state; 7254 int circular; 7255 7256 cdip = vlun->svl_dip; 7257 pip = spip = NULL; 7258 ndi_devi_enter(cdip, &circular); 7259 pip = mdi_get_next_phci_path(cdip, NULL); 7260 while (pip != NULL) { 7261 (void) mdi_pi_get_state2(pip, &pstate, &p_ext_state); 7262 if (pstate != MDI_PATHINFO_STATE_ONLINE) { 7263 spip = pip; 7264 pip = mdi_get_next_phci_path(cdip, spip); 7265 continue; 7266 } 7267 mdi_hold_path(pip); 7268 ndi_devi_exit(cdip, circular); 7269 svp = (scsi_vhci_priv_t *)mdi_pi_get_vhci_private(pip); 7270 mutex_enter(&svp->svp_mutex); 7271 while (svp->svp_cmds != 0) { 7272 if (cv_timedwait(&svp->svp_cv, &svp->svp_mutex, 7273 ddi_get_lbolt() + drv_usectohz 7274 (vhci_path_quiesce_timeout * 1000000)) == -1) { 7275 mutex_exit(&svp->svp_mutex); 7276 mdi_rele_path(pip); 7277 VHCI_DEBUG(1, (CE_WARN, NULL, 7278 "Quiesce of lun is not successful " 7279 "vlun: 0x%p.", (void *)vlun)); 7280 return (0); 7281 } 7282 } 7283 mutex_exit(&svp->svp_mutex); 7284 ndi_devi_enter(cdip, &circular); 7285 spip = pip; 7286 pip = mdi_get_next_phci_path(cdip, spip); 7287 mdi_rele_path(spip); 7288 } 7289 ndi_devi_exit(cdip, circular); 7290 return (1); 7291 } 7292 7293 static int 7294 vhci_pgr_validate_and_register(scsi_vhci_priv_t *svp) 7295 { 7296 scsi_vhci_lun_t *vlun; 7297 vhci_prout_t *prout; 7298 int rval, success; 7299 mdi_pathinfo_t *pip, *npip; 7300 scsi_vhci_priv_t *osvp; 7301 dev_info_t *cdip; 7302 uchar_t cdb_1; 7303 uchar_t temp_res_key[MHIOC_RESV_KEY_SIZE]; 7304 7305 7306 /* 7307 * see if there are any other paths available; if none, 7308 * then there is nothing to do. 7309 */ 7310 cdip = svp->svp_svl->svl_dip; 7311 rval = mdi_select_path(cdip, NULL, MDI_SELECT_ONLINE_PATH | 7312 MDI_SELECT_STANDBY_PATH, NULL, &pip); 7313 if ((rval != MDI_SUCCESS) || (pip == NULL)) { 7314 VHCI_DEBUG(4, (CE_NOTE, NULL, 7315 "%s%d: vhci_pgr_validate_and_register: first path\n", 7316 ddi_driver_name(cdip), ddi_get_instance(cdip))); 7317 return (1); 7318 } 7319 7320 vlun = svp->svp_svl; 7321 prout = &vlun->svl_prout; 7322 ASSERT(vlun->svl_pgr_active != 0); 7323 7324 /* 7325 * When the path was busy/offlined, some other host might have 7326 * cleared this key. Validate key on some other path first. 7327 * If it fails, return failure. 7328 */ 7329 7330 npip = pip; 7331 pip = NULL; 7332 success = 0; 7333 7334 /* Save the res key */ 7335 bcopy((const void *)prout->res_key, 7336 (void *)temp_res_key, MHIOC_RESV_KEY_SIZE); 7337 7338 /* 7339 * Sometimes CDB from application can be a Register_And_Ignore. 7340 * Instead of validation, this cdb would result in force registration. 7341 * Convert it to normal cdb for validation. 7342 * After that be sure to restore the cdb. 7343 */ 7344 cdb_1 = vlun->svl_cdb[1]; 7345 vlun->svl_cdb[1] &= 0xe0; 7346 7347 do { 7348 osvp = (scsi_vhci_priv_t *) 7349 mdi_pi_get_vhci_private(npip); 7350 if (osvp == NULL) { 7351 VHCI_DEBUG(4, (CE_NOTE, NULL, 7352 "vhci_pgr_validate_and_register: no " 7353 "client priv! 0x%p offlined?\n", 7354 (void *)npip)); 7355 goto next_path_1; 7356 } 7357 7358 if (osvp == svp) { 7359 VHCI_DEBUG(4, (CE_NOTE, NULL, 7360 "vhci_pgr_validate_and_register: same svp 0x%p" 7361 " npip 0x%p vlun 0x%p\n", 7362 (void *)svp, (void *)npip, (void *)vlun)); 7363 goto next_path_1; 7364 } 7365 7366 VHCI_DEBUG(4, (CE_NOTE, NULL, 7367 "vhci_pgr_validate_and_register: First validate on" 7368 " osvp 0x%p being done. vlun 0x%p thread 0x%p Before bcopy" 7369 " cdb1 %x\n", (void *)osvp, (void *)vlun, 7370 (void *)curthread, vlun->svl_cdb[1])); 7371 vhci_print_prout_keys(vlun, "v_pgr_val_reg: before bcopy:"); 7372 7373 bcopy((const void *)prout->service_key, 7374 (void *)prout->res_key, MHIOC_RESV_KEY_SIZE); 7375 7376 VHCI_DEBUG(4, (CE_WARN, NULL, "vlun 0x%p After bcopy", 7377 (void *)vlun)); 7378 vhci_print_prout_keys(vlun, "v_pgr_val_reg: after bcopy: "); 7379 7380 rval = vhci_do_prout(osvp); 7381 if (rval == 1) { 7382 VHCI_DEBUG(4, (CE_NOTE, NULL, 7383 "%s%d: vhci_pgr_validate_and_register: key" 7384 " validated thread 0x%p\n", ddi_driver_name(cdip), 7385 ddi_get_instance(cdip), (void *)curthread)); 7386 pip = npip; 7387 success = 1; 7388 break; 7389 } else { 7390 VHCI_DEBUG(4, (CE_NOTE, NULL, 7391 "vhci_pgr_validate_and_register: First validation" 7392 " on osvp 0x%p failed %x\n", (void *)osvp, rval)); 7393 vhci_print_prout_keys(vlun, "v_pgr_val_reg: failed:"); 7394 } 7395 7396 /* 7397 * Try other paths 7398 */ 7399 next_path_1: 7400 pip = npip; 7401 rval = mdi_select_path(cdip, NULL, 7402 MDI_SELECT_ONLINE_PATH|MDI_SELECT_STANDBY_PATH, 7403 pip, &npip); 7404 mdi_rele_path(pip); 7405 } while ((rval == MDI_SUCCESS) && (npip != NULL)); 7406 7407 7408 /* Be sure to restore original cdb */ 7409 vlun->svl_cdb[1] = cdb_1; 7410 7411 /* Restore the res_key */ 7412 bcopy((const void *)temp_res_key, 7413 (void *)prout->res_key, MHIOC_RESV_KEY_SIZE); 7414 7415 /* 7416 * If key could not be registered on any path for the first time, 7417 * return success as online should still continue. 7418 */ 7419 if (success == 0) { 7420 return (1); 7421 } 7422 7423 ASSERT(pip != NULL); 7424 7425 /* 7426 * Force register on new path 7427 */ 7428 cdb_1 = vlun->svl_cdb[1]; /* store the cdb */ 7429 7430 vlun->svl_cdb[1] &= 0xe0; 7431 vlun->svl_cdb[1] |= VHCI_PROUT_R_AND_IGNORE; 7432 7433 vhci_print_prout_keys(vlun, "v_pgr_val_reg: keys before bcopy: "); 7434 7435 bcopy((const void *)prout->active_service_key, 7436 (void *)prout->service_key, MHIOC_RESV_KEY_SIZE); 7437 bcopy((const void *)prout->active_res_key, 7438 (void *)prout->res_key, MHIOC_RESV_KEY_SIZE); 7439 7440 vhci_print_prout_keys(vlun, "v_pgr_val_reg:keys after bcopy: "); 7441 7442 rval = vhci_do_prout(svp); 7443 vlun->svl_cdb[1] = cdb_1; /* restore the cdb */ 7444 if (rval != 1) { 7445 VHCI_DEBUG(4, (CE_NOTE, NULL, 7446 "vhci_pgr_validate_and_register: register on new" 7447 " path 0x%p svp 0x%p failed %x\n", 7448 (void *)pip, (void *)svp, rval)); 7449 vhci_print_prout_keys(vlun, "v_pgr_val_reg: reg failed: "); 7450 mdi_rele_path(pip); 7451 return (0); 7452 } 7453 7454 if (bcmp(prout->service_key, zero_key, MHIOC_RESV_KEY_SIZE) == 0) { 7455 VHCI_DEBUG(4, (CE_NOTE, NULL, 7456 "vhci_pgr_validate_and_register: zero service key\n")); 7457 mdi_rele_path(pip); 7458 return (rval); 7459 } 7460 7461 /* 7462 * While the key was force registered, some other host might have 7463 * cleared the key. Re-validate key on another pre-existing path 7464 * before declaring success. 7465 */ 7466 npip = pip; 7467 pip = NULL; 7468 7469 /* 7470 * Sometimes CDB from application can be Register and Ignore. 7471 * Instead of validation, it would result in force registration. 7472 * Convert it to normal cdb for validation. 7473 * After that be sure to restore the cdb. 7474 */ 7475 cdb_1 = vlun->svl_cdb[1]; 7476 vlun->svl_cdb[1] &= 0xe0; 7477 success = 0; 7478 7479 do { 7480 osvp = (scsi_vhci_priv_t *) 7481 mdi_pi_get_vhci_private(npip); 7482 if (osvp == NULL) { 7483 VHCI_DEBUG(4, (CE_NOTE, NULL, 7484 "vhci_pgr_validate_and_register: no " 7485 "client priv! 0x%p offlined?\n", 7486 (void *)npip)); 7487 goto next_path_2; 7488 } 7489 7490 if (osvp == svp) { 7491 VHCI_DEBUG(4, (CE_NOTE, NULL, 7492 "vhci_pgr_validate_and_register: same osvp 0x%p" 7493 " npip 0x%p vlun 0x%p\n", 7494 (void *)svp, (void *)npip, (void *)vlun)); 7495 goto next_path_2; 7496 } 7497 7498 VHCI_DEBUG(4, (CE_NOTE, NULL, 7499 "vhci_pgr_validate_and_register: Re-validation on" 7500 " osvp 0x%p being done. vlun 0x%p Before bcopy cdb1 %x\n", 7501 (void *)osvp, (void *)vlun, vlun->svl_cdb[1])); 7502 vhci_print_prout_keys(vlun, "v_pgr_val_reg: before bcopy: "); 7503 7504 bcopy((const void *)prout->service_key, 7505 (void *)prout->res_key, MHIOC_RESV_KEY_SIZE); 7506 7507 vhci_print_prout_keys(vlun, "v_pgr_val_reg: after bcopy: "); 7508 7509 rval = vhci_do_prout(osvp); 7510 if (rval == 1) { 7511 VHCI_DEBUG(4, (CE_NOTE, NULL, 7512 "%s%d: vhci_pgr_validate_and_register: key" 7513 " validated thread 0x%p\n", ddi_driver_name(cdip), 7514 ddi_get_instance(cdip), (void *)curthread)); 7515 pip = npip; 7516 success = 1; 7517 break; 7518 } else { 7519 VHCI_DEBUG(4, (CE_NOTE, NULL, 7520 "vhci_pgr_validate_and_register: Re-validation on" 7521 " osvp 0x%p failed %x\n", (void *)osvp, rval)); 7522 vhci_print_prout_keys(vlun, 7523 "v_pgr_val_reg: reval failed: "); 7524 } 7525 7526 /* 7527 * Try other paths 7528 */ 7529 next_path_2: 7530 pip = npip; 7531 rval = mdi_select_path(cdip, NULL, 7532 MDI_SELECT_ONLINE_PATH|MDI_SELECT_STANDBY_PATH, 7533 pip, &npip); 7534 mdi_rele_path(pip); 7535 } while ((rval == MDI_SUCCESS) && (npip != NULL)); 7536 7537 /* Be sure to restore original cdb */ 7538 vlun->svl_cdb[1] = cdb_1; 7539 7540 if (success == 1) { 7541 /* Successfully validated registration */ 7542 mdi_rele_path(pip); 7543 return (1); 7544 } 7545 7546 VHCI_DEBUG(4, (CE_WARN, NULL, "key validation failed")); 7547 7548 /* 7549 * key invalid, back out by registering key value of 0 7550 */ 7551 VHCI_DEBUG(4, (CE_NOTE, NULL, 7552 "vhci_pgr_validate_and_register: backout on" 7553 " svp 0x%p being done\n", (void *)svp)); 7554 vhci_print_prout_keys(vlun, "v_pgr_val_reg: before bcopy: "); 7555 7556 bcopy((const void *)prout->service_key, (void *)prout->res_key, 7557 MHIOC_RESV_KEY_SIZE); 7558 bzero((void *)prout->service_key, MHIOC_RESV_KEY_SIZE); 7559 7560 vhci_print_prout_keys(vlun, "v_pgr_val_reg: before bcopy: "); 7561 7562 /* 7563 * Get a new path 7564 */ 7565 rval = mdi_select_path(cdip, NULL, MDI_SELECT_ONLINE_PATH | 7566 MDI_SELECT_STANDBY_PATH, NULL, &pip); 7567 if ((rval != MDI_SUCCESS) || (pip == NULL)) { 7568 VHCI_DEBUG(4, (CE_NOTE, NULL, 7569 "%s%d: vhci_pgr_validate_and_register: no valid pip\n", 7570 ddi_driver_name(cdip), ddi_get_instance(cdip))); 7571 return (0); 7572 } 7573 7574 if ((rval = vhci_do_prout(svp)) != 1) { 7575 VHCI_DEBUG(4, (CE_NOTE, NULL, 7576 "vhci_pgr_validate_and_register: backout on" 7577 " svp 0x%p failed\n", (void *)svp)); 7578 vhci_print_prout_keys(vlun, "backout failed"); 7579 7580 VHCI_DEBUG(4, (CE_WARN, NULL, 7581 "%s%d: vhci_pgr_validate_and_register: key" 7582 " validation and backout failed", ddi_driver_name(cdip), 7583 ddi_get_instance(cdip))); 7584 if (rval == VHCI_PGR_ILLEGALOP) { 7585 VHCI_DEBUG(4, (CE_WARN, NULL, 7586 "%s%d: vhci_pgr_validate_and_register: key" 7587 " already cleared", ddi_driver_name(cdip), 7588 ddi_get_instance(cdip))); 7589 rval = 1; 7590 } else 7591 rval = 0; 7592 } else { 7593 VHCI_DEBUG(4, (CE_NOTE, NULL, 7594 "%s%d: vhci_pgr_validate_and_register: key" 7595 " validation failed, key backed out\n", 7596 ddi_driver_name(cdip), ddi_get_instance(cdip))); 7597 vhci_print_prout_keys(vlun, "v_pgr_val_reg: key backed out: "); 7598 } 7599 mdi_rele_path(pip); 7600 7601 return (rval); 7602 } 7603 7604 /* 7605 * taskq routine to dispatch a scsi cmd to vhci_scsi_start. This ensures 7606 * that vhci_scsi_start is not called in interrupt context. 7607 * As the upper layer gets TRAN_ACCEPT when the command is dispatched, we 7608 * need to complete the command if something goes wrong. 7609 */ 7610 static void 7611 vhci_dispatch_scsi_start(void *arg) 7612 { 7613 struct vhci_pkt *vpkt = (struct vhci_pkt *)arg; 7614 struct scsi_pkt *tpkt = vpkt->vpkt_tgt_pkt; 7615 int rval = TRAN_BUSY; 7616 7617 VHCI_DEBUG(6, (CE_NOTE, NULL, "!vhci_dispatch_scsi_start: sending" 7618 " scsi-2 reserve for 0x%p\n", 7619 (void *)ADDR2DIP(&(vpkt->vpkt_tgt_pkt->pkt_address)))); 7620 7621 /* 7622 * To prevent the taskq from being called recursively we set the 7623 * the VHCI_PKT_THRU_TASKQ bit in the vhci_pkt_states. 7624 */ 7625 vpkt->vpkt_state |= VHCI_PKT_THRU_TASKQ; 7626 7627 /* 7628 * Wait for the transport to get ready to send packets 7629 * and if it times out, it will return something other than 7630 * TRAN_BUSY. The vhci_reserve_delay may want to 7631 * get tuned for other transports and is therefore a global. 7632 * Using delay since this routine is called by taskq dispatch 7633 * and not called during interrupt context. 7634 */ 7635 while ((rval = vhci_scsi_start(&(vpkt->vpkt_tgt_pkt->pkt_address), 7636 vpkt->vpkt_tgt_pkt)) == TRAN_BUSY) { 7637 delay(drv_usectohz(vhci_reserve_delay)); 7638 } 7639 7640 switch (rval) { 7641 case TRAN_ACCEPT: 7642 return; 7643 7644 default: 7645 /* 7646 * This pkt shall be retried, and to ensure another taskq 7647 * is dispatched for it, clear the VHCI_PKT_THRU_TASKQ 7648 * flag. 7649 */ 7650 vpkt->vpkt_state &= ~VHCI_PKT_THRU_TASKQ; 7651 7652 /* Ensure that the pkt is retried without a reset */ 7653 tpkt->pkt_reason = CMD_ABORTED; 7654 tpkt->pkt_statistics |= STAT_ABORTED; 7655 VHCI_DEBUG(1, (CE_WARN, NULL, "!vhci_dispatch_scsi_start: " 7656 "TRAN_rval %d returned for dip 0x%p", rval, 7657 (void *)ADDR2DIP(&(vpkt->vpkt_tgt_pkt->pkt_address)))); 7658 break; 7659 } 7660 7661 /* 7662 * vpkt_org_vpkt should always be NULL here if the retry command 7663 * has been successfully dispatched. If vpkt_org_vpkt != NULL at 7664 * this point, it is an error so restore the original vpkt and 7665 * return an error to the target driver so it can retry the 7666 * command as appropriate. 7667 */ 7668 if (vpkt->vpkt_org_vpkt != NULL) { 7669 struct vhci_pkt *new_vpkt = vpkt; 7670 scsi_vhci_priv_t *svp = (scsi_vhci_priv_t *) 7671 mdi_pi_get_vhci_private(vpkt->vpkt_path); 7672 7673 vpkt = vpkt->vpkt_org_vpkt; 7674 7675 vpkt->vpkt_tgt_pkt->pkt_reason = tpkt->pkt_reason; 7676 vpkt->vpkt_tgt_pkt->pkt_statistics = tpkt->pkt_statistics; 7677 7678 vhci_scsi_destroy_pkt(&svp->svp_psd->sd_address, 7679 new_vpkt->vpkt_tgt_pkt); 7680 7681 tpkt = vpkt->vpkt_tgt_pkt; 7682 } 7683 7684 if (tpkt->pkt_comp) { 7685 (*tpkt->pkt_comp)(tpkt); 7686 } 7687 } 7688 7689 static void 7690 vhci_initiate_auto_failback(void *arg) 7691 { 7692 struct scsi_vhci_lun *vlun = (struct scsi_vhci_lun *)arg; 7693 dev_info_t *vdip, *cdip; 7694 int held; 7695 7696 cdip = vlun->svl_dip; 7697 vdip = ddi_get_parent(cdip); 7698 7699 VHCI_HOLD_LUN(vlun, VH_SLEEP, held); 7700 7701 /* 7702 * Perform a final check to see if the active path class is indeed 7703 * not the prefered path class. As in the time the auto failback 7704 * was dispatched, an external failover could have been detected. 7705 * [Some other host could have detected this condition and triggered 7706 * the auto failback before]. 7707 * In such a case if we go ahead with failover we will be negating the 7708 * whole purpose of auto failback. 7709 */ 7710 mutex_enter(&vlun->svl_mutex); 7711 if (vlun->svl_active_pclass != NULL) { 7712 char *best_pclass; 7713 struct scsi_failover_ops *fo; 7714 7715 fo = vlun->svl_fops; 7716 7717 (*fo->sfo_pathclass_next)(NULL, &best_pclass, 7718 vlun->svl_fops_ctpriv); 7719 if (strcmp(vlun->svl_active_pclass, best_pclass) == 0) { 7720 mutex_exit(&vlun->svl_mutex); 7721 VHCI_RELEASE_LUN(vlun); 7722 VHCI_DEBUG(1, (CE_NOTE, NULL, "Not initiating " 7723 "auto failback for %s as %s pathclass already " 7724 "active.\n", vlun->svl_lun_wwn, best_pclass)); 7725 return; 7726 } 7727 } 7728 mutex_exit(&vlun->svl_mutex); 7729 if (mdi_failover(vdip, vlun->svl_dip, MDI_FAILOVER_SYNC) 7730 == MDI_SUCCESS) { 7731 vhci_log(CE_NOTE, vdip, "!Auto failback operation " 7732 "succeeded for device %s (GUID %s)", 7733 ddi_node_name(cdip), vlun->svl_lun_wwn); 7734 } else { 7735 vhci_log(CE_NOTE, vdip, "!Auto failback operation " 7736 "failed for device %s (GUID %s)", 7737 ddi_node_name(cdip), vlun->svl_lun_wwn); 7738 } 7739 VHCI_RELEASE_LUN(vlun); 7740 } 7741 7742 #ifdef DEBUG 7743 static void 7744 vhci_print_prin_keys(vhci_prin_readkeys_t *prin, int numkeys) 7745 { 7746 uchar_t index = 0; 7747 char buf[100]; 7748 7749 VHCI_DEBUG(5, (CE_NOTE, NULL, "num keys %d\n", numkeys)); 7750 7751 while (index < numkeys) { 7752 bcopy(&prin->keylist[index], buf, MHIOC_RESV_KEY_SIZE); 7753 VHCI_DEBUG(5, (CE_NOTE, NULL, 7754 "%02x%02x%02x%02x%02x%02x%02x%02x\t", 7755 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], 7756 buf[7])); 7757 index++; 7758 } 7759 } 7760 #endif 7761 7762 static void 7763 vhci_print_prout_keys(scsi_vhci_lun_t *vlun, char *msg) 7764 { 7765 int i; 7766 vhci_prout_t *prout; 7767 char buf1[4*MHIOC_RESV_KEY_SIZE + 1]; 7768 char buf2[4*MHIOC_RESV_KEY_SIZE + 1]; 7769 char buf3[4*MHIOC_RESV_KEY_SIZE + 1]; 7770 char buf4[4*MHIOC_RESV_KEY_SIZE + 1]; 7771 7772 prout = &vlun->svl_prout; 7773 7774 for (i = 0; i < MHIOC_RESV_KEY_SIZE; i++) 7775 (void) sprintf(&buf1[4*i], "[%02x]", prout->res_key[i]); 7776 for (i = 0; i < MHIOC_RESV_KEY_SIZE; i++) 7777 (void) sprintf(&buf2[(4*i)], "[%02x]", prout->service_key[i]); 7778 for (i = 0; i < MHIOC_RESV_KEY_SIZE; i++) 7779 (void) sprintf(&buf3[4*i], "[%02x]", prout->active_res_key[i]); 7780 for (i = 0; i < MHIOC_RESV_KEY_SIZE; i++) 7781 (void) sprintf(&buf4[4*i], "[%02x]", 7782 prout->active_service_key[i]); 7783 7784 /* Printing all in one go. Otherwise it will jumble up */ 7785 VHCI_DEBUG(5, (CE_CONT, NULL, "%s vlun 0x%p, thread 0x%p\n" 7786 "res_key: : %s\n" 7787 "service_key : %s\n" 7788 "active_res_key : %s\n" 7789 "active_service_key: %s\n", 7790 msg, (void *)vlun, (void *)curthread, buf1, buf2, buf3, buf4)); 7791 } 7792 7793 /* 7794 * Called from vhci_scsi_start to update the pHCI pkt with target packet. 7795 */ 7796 static void 7797 vhci_update_pHCI_pkt(struct vhci_pkt *vpkt, struct scsi_pkt *pkt) 7798 { 7799 7800 ASSERT(vpkt->vpkt_hba_pkt); 7801 7802 vpkt->vpkt_hba_pkt->pkt_flags = pkt->pkt_flags; 7803 vpkt->vpkt_hba_pkt->pkt_flags |= FLAG_NOQUEUE; 7804 7805 if ((vpkt->vpkt_hba_pkt->pkt_flags & FLAG_NOINTR) || 7806 MDI_PI_IS_SUSPENDED(vpkt->vpkt_path)) { 7807 /* 7808 * Polled Command is requested or HBA is in 7809 * suspended state 7810 */ 7811 vpkt->vpkt_hba_pkt->pkt_flags |= FLAG_NOINTR; 7812 vpkt->vpkt_hba_pkt->pkt_comp = NULL; 7813 } else { 7814 vpkt->vpkt_hba_pkt->pkt_comp = vhci_intr; 7815 } 7816 vpkt->vpkt_hba_pkt->pkt_time = pkt->pkt_time; 7817 bcopy(pkt->pkt_cdbp, vpkt->vpkt_hba_pkt->pkt_cdbp, 7818 vpkt->vpkt_tgt_init_cdblen); 7819 vpkt->vpkt_hba_pkt->pkt_resid = pkt->pkt_resid; 7820 7821 /* Re-initialize the following pHCI packet state information */ 7822 vpkt->vpkt_hba_pkt->pkt_state = 0; 7823 vpkt->vpkt_hba_pkt->pkt_statistics = 0; 7824 vpkt->vpkt_hba_pkt->pkt_reason = 0; 7825 } 7826 7827 static int 7828 vhci_scsi_bus_power(dev_info_t *parent, void *impl_arg, pm_bus_power_op_t op, 7829 void *arg, void *result) 7830 { 7831 int ret = DDI_SUCCESS; 7832 7833 /* 7834 * Generic processing in MPxIO framework 7835 */ 7836 ret = mdi_bus_power(parent, impl_arg, op, arg, result); 7837 7838 switch (ret) { 7839 case MDI_SUCCESS: 7840 ret = DDI_SUCCESS; 7841 break; 7842 case MDI_FAILURE: 7843 ret = DDI_FAILURE; 7844 break; 7845 default: 7846 break; 7847 } 7848 7849 return (ret); 7850 } 7851 7852 static int 7853 vhci_pHCI_cap(struct scsi_address *ap, char *cap, int val, int whom, 7854 mdi_pathinfo_t *pip) 7855 { 7856 dev_info_t *cdip; 7857 mdi_pathinfo_t *npip = NULL; 7858 scsi_vhci_priv_t *svp = NULL; 7859 struct scsi_address *pap = NULL; 7860 scsi_hba_tran_t *hba = NULL; 7861 int sps; 7862 int mps_flag; 7863 int rval = 0; 7864 7865 mps_flag = (MDI_SELECT_ONLINE_PATH | MDI_SELECT_STANDBY_PATH); 7866 if (pip) { 7867 /* 7868 * If the call is from vhci_pathinfo_state_change, 7869 * then this path was busy and is becoming ready to accept IO. 7870 */ 7871 ASSERT(ap != NULL); 7872 hba = ap->a_hba_tran; 7873 ASSERT(hba != NULL); 7874 rval = scsi_ifsetcap(ap, cap, val, whom); 7875 7876 VHCI_DEBUG(2, (CE_NOTE, NULL, 7877 "!vhci_pHCI_cap: only on path %p, ap %p, rval %x\n", 7878 (void *)pip, (void *)ap, rval)); 7879 7880 return (rval); 7881 } 7882 7883 /* 7884 * Set capability on all the pHCIs. 7885 * If any path is busy, then the capability would be set by 7886 * vhci_pathinfo_state_change. 7887 */ 7888 7889 cdip = ADDR2DIP(ap); 7890 ASSERT(cdip != NULL); 7891 sps = mdi_select_path(cdip, NULL, mps_flag, NULL, &pip); 7892 if ((sps != MDI_SUCCESS) || (pip == NULL)) { 7893 VHCI_DEBUG(2, (CE_WARN, NULL, 7894 "!vhci_pHCI_cap: Unable to get a path, dip 0x%p", 7895 (void *)cdip)); 7896 return (0); 7897 } 7898 7899 again: 7900 svp = (scsi_vhci_priv_t *)mdi_pi_get_vhci_private(pip); 7901 if (svp == NULL) { 7902 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_pHCI_cap: " 7903 "priv is NULL, pip 0x%p", (void *)pip)); 7904 mdi_rele_path(pip); 7905 return (rval); 7906 } 7907 7908 if (svp->svp_psd == NULL) { 7909 VHCI_DEBUG(2, (CE_WARN, NULL, "!vhci_pHCI_cap: " 7910 "psd is NULL, pip 0x%p, svp 0x%p", 7911 (void *)pip, (void *)svp)); 7912 mdi_rele_path(pip); 7913 return (rval); 7914 } 7915 7916 pap = &svp->svp_psd->sd_address; 7917 ASSERT(pap != NULL); 7918 hba = pap->a_hba_tran; 7919 ASSERT(hba != NULL); 7920 7921 if (hba->tran_setcap != NULL) { 7922 rval = scsi_ifsetcap(pap, cap, val, whom); 7923 7924 VHCI_DEBUG(2, (CE_NOTE, NULL, 7925 "!vhci_pHCI_cap: path %p, ap %p, rval %x\n", 7926 (void *)pip, (void *)ap, rval)); 7927 7928 /* 7929 * Select next path and issue the setcap, repeat 7930 * until all paths are exhausted 7931 */ 7932 sps = mdi_select_path(cdip, NULL, mps_flag, pip, &npip); 7933 if ((sps != MDI_SUCCESS) || (npip == NULL)) { 7934 mdi_rele_path(pip); 7935 return (1); 7936 } 7937 mdi_rele_path(pip); 7938 pip = npip; 7939 goto again; 7940 } 7941 mdi_rele_path(pip); 7942 return (rval); 7943 } 7944 7945 static int 7946 vhci_scsi_bus_config(dev_info_t *pdip, uint_t flags, ddi_bus_config_op_t op, 7947 void *arg, dev_info_t **child) 7948 { 7949 char *guid; 7950 7951 if (op == BUS_CONFIG_ONE || op == BUS_UNCONFIG_ONE) 7952 guid = vhci_devnm_to_guid((char *)arg); 7953 else 7954 guid = NULL; 7955 7956 if (mdi_vhci_bus_config(pdip, flags, op, arg, child, guid) 7957 == MDI_SUCCESS) 7958 return (NDI_SUCCESS); 7959 else 7960 return (NDI_FAILURE); 7961 } 7962 7963 /* 7964 * Take the original vhci_pkt, create a duplicate of the pkt for resending 7965 * as though it originated in ssd. 7966 */ 7967 static struct scsi_pkt * 7968 vhci_create_retry_pkt(struct vhci_pkt *vpkt) 7969 { 7970 struct vhci_pkt *new_vpkt = NULL; 7971 struct scsi_pkt *pkt = NULL; 7972 7973 scsi_vhci_priv_t *svp = (scsi_vhci_priv_t *) 7974 mdi_pi_get_vhci_private(vpkt->vpkt_path); 7975 7976 /* 7977 * Ensure consistent data at completion time by setting PKT_CONSISTENT 7978 */ 7979 pkt = vhci_scsi_init_pkt(&svp->svp_psd->sd_address, pkt, 7980 vpkt->vpkt_tgt_init_bp, vpkt->vpkt_tgt_init_cdblen, 7981 vpkt->vpkt_tgt_init_scblen, vpkt->vpkt_tgt_init_privlen, 7982 PKT_CONSISTENT, 7983 NULL_FUNC, NULL); 7984 if (pkt != NULL) { 7985 new_vpkt = TGTPKT2VHCIPKT(pkt); 7986 7987 pkt->pkt_address = vpkt->vpkt_tgt_pkt->pkt_address; 7988 pkt->pkt_flags = vpkt->vpkt_tgt_pkt->pkt_flags; 7989 pkt->pkt_time = vpkt->vpkt_tgt_pkt->pkt_time; 7990 pkt->pkt_comp = vpkt->vpkt_tgt_pkt->pkt_comp; 7991 7992 pkt->pkt_resid = 0; 7993 pkt->pkt_statistics = 0; 7994 pkt->pkt_reason = 0; 7995 7996 bcopy(vpkt->vpkt_tgt_pkt->pkt_cdbp, 7997 pkt->pkt_cdbp, vpkt->vpkt_tgt_init_cdblen); 7998 7999 /* 8000 * Save a pointer to the original vhci_pkt 8001 */ 8002 new_vpkt->vpkt_org_vpkt = vpkt; 8003 } 8004 8005 return (pkt); 8006 } 8007 8008 /* 8009 * Copy the successful completion information from the hba packet into 8010 * the original target pkt from the upper layer. Returns the original 8011 * vpkt and destroys the new vpkt from the internal retry. 8012 */ 8013 static struct vhci_pkt * 8014 vhci_sync_retry_pkt(struct vhci_pkt *vpkt) 8015 { 8016 struct vhci_pkt *ret_vpkt = NULL; 8017 struct scsi_pkt *tpkt = NULL; 8018 struct scsi_pkt *hba_pkt = NULL; 8019 scsi_vhci_priv_t *svp = (scsi_vhci_priv_t *) 8020 mdi_pi_get_vhci_private(vpkt->vpkt_path); 8021 8022 ASSERT(vpkt->vpkt_org_vpkt != NULL); 8023 VHCI_DEBUG(0, (CE_NOTE, NULL, "vhci_sync_retry_pkt: Retry pkt " 8024 "completed successfully!\n")); 8025 8026 ret_vpkt = vpkt->vpkt_org_vpkt; 8027 tpkt = ret_vpkt->vpkt_tgt_pkt; 8028 hba_pkt = vpkt->vpkt_hba_pkt; 8029 8030 /* 8031 * Copy the good status into the target driver's packet 8032 */ 8033 *(tpkt->pkt_scbp) = *(hba_pkt->pkt_scbp); 8034 tpkt->pkt_resid = hba_pkt->pkt_resid; 8035 tpkt->pkt_state = hba_pkt->pkt_state; 8036 tpkt->pkt_statistics = hba_pkt->pkt_statistics; 8037 tpkt->pkt_reason = hba_pkt->pkt_reason; 8038 8039 /* 8040 * Destroy the internally created vpkt for the retry 8041 */ 8042 vhci_scsi_destroy_pkt(&svp->svp_psd->sd_address, 8043 vpkt->vpkt_tgt_pkt); 8044 8045 return (ret_vpkt); 8046 } 8047 8048 /* restart the request sense request */ 8049 static void 8050 vhci_uscsi_restart_sense(void *arg) 8051 { 8052 struct buf *rqbp; 8053 struct buf *bp; 8054 struct scsi_pkt *rqpkt = (struct scsi_pkt *)arg; 8055 mp_uscsi_cmd_t *mp_uscmdp; 8056 8057 VHCI_DEBUG(4, (CE_WARN, NULL, 8058 "vhci_uscsi_restart_sense: enter: rqpkt: %p", (void *)rqpkt)); 8059 8060 if (scsi_transport(rqpkt) != TRAN_ACCEPT) { 8061 /* if it fails - need to wakeup the original command */ 8062 mp_uscmdp = rqpkt->pkt_private; 8063 bp = mp_uscmdp->cmdbp; 8064 rqbp = mp_uscmdp->rqbp; 8065 ASSERT(mp_uscmdp && bp && rqbp); 8066 scsi_free_consistent_buf(rqbp); 8067 scsi_destroy_pkt(rqpkt); 8068 bp->b_resid = bp->b_bcount; 8069 bioerror(bp, EIO); 8070 biodone(bp); 8071 } 8072 } 8073 8074 /* 8075 * auto-rqsense is not enabled so we have to retrieve the request sense 8076 * manually. 8077 */ 8078 static int 8079 vhci_uscsi_send_sense(struct scsi_pkt *pkt, mp_uscsi_cmd_t *mp_uscmdp) 8080 { 8081 struct buf *rqbp, *cmdbp; 8082 struct scsi_pkt *rqpkt; 8083 int rval = 0; 8084 8085 cmdbp = mp_uscmdp->cmdbp; 8086 ASSERT(cmdbp != NULL); 8087 8088 VHCI_DEBUG(4, (CE_WARN, NULL, 8089 "vhci_uscsi_send_sense: enter: bp: %p pkt: %p scmd: %p", 8090 (void *)cmdbp, (void *)pkt, (void *)mp_uscmdp)); 8091 /* set up the packet information and cdb */ 8092 if ((rqbp = scsi_alloc_consistent_buf(mp_uscmdp->ap, NULL, 8093 SENSE_LENGTH, B_READ, NULL, NULL)) == NULL) { 8094 return (-1); 8095 } 8096 8097 if ((rqpkt = scsi_init_pkt(mp_uscmdp->ap, NULL, rqbp, 8098 CDB_GROUP0, 1, 0, PKT_CONSISTENT, NULL, NULL)) == NULL) { 8099 scsi_free_consistent_buf(rqbp); 8100 return (-1); 8101 } 8102 8103 (void) scsi_setup_cdb((union scsi_cdb *)(intptr_t)rqpkt->pkt_cdbp, 8104 SCMD_REQUEST_SENSE, 0, SENSE_LENGTH, 0); 8105 8106 mp_uscmdp->rqbp = rqbp; 8107 rqbp->b_private = mp_uscmdp; 8108 rqpkt->pkt_flags |= FLAG_SENSING; 8109 rqpkt->pkt_time = 60; 8110 rqpkt->pkt_comp = vhci_uscsi_iodone; 8111 rqpkt->pkt_private = mp_uscmdp; 8112 8113 /* get her done */ 8114 switch (scsi_transport(rqpkt)) { 8115 case TRAN_ACCEPT: 8116 VHCI_DEBUG(1, (CE_NOTE, NULL, "vhci_uscsi_send_sense: " 8117 "transport accepted.")); 8118 break; 8119 case TRAN_BUSY: 8120 VHCI_DEBUG(1, (CE_NOTE, NULL, "vhci_uscsi_send_sense: " 8121 "transport busy, setting timeout.")); 8122 vhci_restart_timeid = timeout(vhci_uscsi_restart_sense, rqpkt, 8123 (drv_usectohz(5 * 1000000))); 8124 break; 8125 default: 8126 VHCI_DEBUG(1, (CE_NOTE, NULL, "vhci_uscsi_send_sense: " 8127 "transport failed")); 8128 scsi_free_consistent_buf(rqbp); 8129 scsi_destroy_pkt(rqpkt); 8130 rval = -1; 8131 } 8132 8133 return (rval); 8134 } 8135 8136 /* 8137 * done routine for the mpapi uscsi command - this is behaving as though 8138 * FLAG_DIAGNOSE is set meaning there are no retries except for a manual 8139 * request sense. 8140 */ 8141 void 8142 vhci_uscsi_iodone(struct scsi_pkt *pkt) 8143 { 8144 struct buf *bp; 8145 mp_uscsi_cmd_t *mp_uscmdp; 8146 struct uscsi_cmd *uscmdp; 8147 struct scsi_arq_status *arqstat; 8148 int err; 8149 8150 mp_uscmdp = (mp_uscsi_cmd_t *)pkt->pkt_private; 8151 uscmdp = mp_uscmdp->uscmdp; 8152 bp = mp_uscmdp->cmdbp; 8153 ASSERT(bp != NULL); 8154 VHCI_DEBUG(4, (CE_WARN, NULL, 8155 "vhci_uscsi_iodone: enter: bp: %p pkt: %p scmd: %p", 8156 (void *)bp, (void *)pkt, (void *)mp_uscmdp)); 8157 /* Save the status and the residual into the uscsi_cmd struct */ 8158 uscmdp->uscsi_status = ((*(pkt)->pkt_scbp) & STATUS_MASK); 8159 uscmdp->uscsi_resid = bp->b_resid; 8160 8161 /* return on a very successful command */ 8162 if (pkt->pkt_reason == CMD_CMPLT && 8163 SCBP_C(pkt) == 0 && ((pkt->pkt_flags & FLAG_SENSING) == 0) && 8164 pkt->pkt_resid == 0) { 8165 mdi_pi_kstat_iosupdate(mp_uscmdp->pip, bp); 8166 scsi_destroy_pkt(pkt); 8167 biodone(bp); 8168 return; 8169 } 8170 VHCI_DEBUG(4, (CE_NOTE, NULL, "iodone: reason=0x%x " 8171 " pkt_resid=%ld pkt_state: 0x%x b_count: %ld b_resid: %ld", 8172 pkt->pkt_reason, pkt->pkt_resid, 8173 pkt->pkt_state, bp->b_bcount, bp->b_resid)); 8174 8175 err = EIO; 8176 8177 arqstat = (struct scsi_arq_status *)(intptr_t)(pkt->pkt_scbp); 8178 if (pkt->pkt_reason != CMD_CMPLT) { 8179 /* 8180 * The command did not complete. 8181 */ 8182 VHCI_DEBUG(4, (CE_NOTE, NULL, 8183 "vhci_uscsi_iodone: command did not complete." 8184 " reason: %x flag: %x", pkt->pkt_reason, pkt->pkt_flags)); 8185 if (pkt->pkt_flags & FLAG_SENSING) { 8186 MDI_PI_ERRSTAT(mp_uscmdp->pip, MDI_PI_TRANSERR); 8187 } else if (pkt->pkt_reason == CMD_TIMEOUT) { 8188 MDI_PI_ERRSTAT(mp_uscmdp->pip, MDI_PI_HARDERR); 8189 err = ETIMEDOUT; 8190 } 8191 } else if (pkt->pkt_state & STATE_ARQ_DONE && mp_uscmdp->arq_enabled) { 8192 /* 8193 * The auto-rqsense happened, and the packet has a filled-in 8194 * scsi_arq_status structure, pointed to by pkt_scbp. 8195 */ 8196 VHCI_DEBUG(4, (CE_NOTE, NULL, 8197 "vhci_uscsi_iodone: received auto-requested sense")); 8198 if (uscmdp->uscsi_flags & USCSI_RQENABLE) { 8199 /* get the amount of data to copy into rqbuf */ 8200 int rqlen = SENSE_LENGTH - arqstat->sts_rqpkt_resid; 8201 rqlen = min(((int)uscmdp->uscsi_rqlen), rqlen); 8202 uscmdp->uscsi_rqresid = uscmdp->uscsi_rqlen - rqlen; 8203 uscmdp->uscsi_rqstatus = 8204 *((char *)&arqstat->sts_rqpkt_status); 8205 if (uscmdp->uscsi_rqbuf && uscmdp->uscsi_rqlen && 8206 rqlen != 0) { 8207 bcopy(&(arqstat->sts_sensedata), 8208 uscmdp->uscsi_rqbuf, rqlen); 8209 } 8210 mdi_pi_kstat_iosupdate(mp_uscmdp->pip, bp); 8211 VHCI_DEBUG(4, (CE_NOTE, NULL, 8212 "vhci_uscsi_iodone: ARQ " 8213 "uscsi_rqstatus=0x%x uscsi_rqresid=%d rqlen: %d " 8214 "xfer: %d rqpkt_resid: %d\n", 8215 uscmdp->uscsi_rqstatus, uscmdp->uscsi_rqresid, 8216 uscmdp->uscsi_rqlen, rqlen, 8217 arqstat->sts_rqpkt_resid)); 8218 } 8219 } else if (pkt->pkt_flags & FLAG_SENSING) { 8220 struct buf *rqbp; 8221 struct scsi_status *rqstatus; 8222 8223 rqstatus = (struct scsi_status *)pkt->pkt_scbp; 8224 /* a manual request sense was done - get the information */ 8225 if (uscmdp->uscsi_flags & USCSI_RQENABLE) { 8226 int rqlen = SENSE_LENGTH - pkt->pkt_resid; 8227 8228 rqbp = mp_uscmdp->rqbp; 8229 /* get the amount of data to copy into rqbuf */ 8230 rqlen = min(((int)uscmdp->uscsi_rqlen), rqlen); 8231 uscmdp->uscsi_rqresid = uscmdp->uscsi_rqlen - rqlen; 8232 uscmdp->uscsi_rqstatus = *((char *)rqstatus); 8233 if (uscmdp->uscsi_rqlen && uscmdp->uscsi_rqbuf) { 8234 bcopy(rqbp->b_un.b_addr, uscmdp->uscsi_rqbuf, 8235 rqlen); 8236 } 8237 MDI_PI_ERRSTAT(mp_uscmdp->pip, MDI_PI_TRANSERR); 8238 scsi_free_consistent_buf(rqbp); 8239 } 8240 VHCI_DEBUG(4, (CE_NOTE, NULL, "vhci_uscsi_iodone: FLAG_SENSING" 8241 "uscsi_rqstatus=0x%x uscsi_rqresid=%d\n", 8242 uscmdp->uscsi_rqstatus, uscmdp->uscsi_rqresid)); 8243 } else { 8244 struct scsi_status *status = 8245 (struct scsi_status *)pkt->pkt_scbp; 8246 /* 8247 * Command completed and we're not getting sense. Check for 8248 * errors and decide what to do next. 8249 */ 8250 VHCI_DEBUG(4, (CE_NOTE, NULL, 8251 "vhci_uscsi_iodone: command appears complete: reason: %x", 8252 pkt->pkt_reason)); 8253 if (status->sts_chk) { 8254 /* need to manually get the request sense */ 8255 if (vhci_uscsi_send_sense(pkt, mp_uscmdp) == 0) { 8256 scsi_destroy_pkt(pkt); 8257 return; 8258 } 8259 } else { 8260 VHCI_DEBUG(4, (CE_NOTE, NULL, 8261 "vhci_chk_err: appears complete")); 8262 err = 0; 8263 mdi_pi_kstat_iosupdate(mp_uscmdp->pip, bp); 8264 if (pkt->pkt_resid) { 8265 bp->b_resid += pkt->pkt_resid; 8266 } 8267 } 8268 } 8269 8270 if (err) { 8271 if (bp->b_resid == 0) 8272 bp->b_resid = bp->b_bcount; 8273 bioerror(bp, err); 8274 bp->b_flags |= B_ERROR; 8275 } 8276 8277 scsi_destroy_pkt(pkt); 8278 biodone(bp); 8279 8280 VHCI_DEBUG(4, (CE_WARN, NULL, "vhci_uscsi_iodone: exit")); 8281 } 8282 8283 /* 8284 * start routine for the mpapi uscsi command 8285 */ 8286 int 8287 vhci_uscsi_iostart(struct buf *bp) 8288 { 8289 struct scsi_pkt *pkt; 8290 struct uscsi_cmd *uscmdp; 8291 mp_uscsi_cmd_t *mp_uscmdp; 8292 int stat_size, rval; 8293 int retry = 0; 8294 8295 ASSERT(bp->b_private != NULL); 8296 8297 mp_uscmdp = (mp_uscsi_cmd_t *)bp->b_private; 8298 uscmdp = mp_uscmdp->uscmdp; 8299 if (uscmdp->uscsi_flags & USCSI_RQENABLE) { 8300 stat_size = SENSE_LENGTH; 8301 } else { 8302 stat_size = 1; 8303 } 8304 8305 pkt = scsi_init_pkt(mp_uscmdp->ap, NULL, bp, uscmdp->uscsi_cdblen, 8306 stat_size, 0, 0, SLEEP_FUNC, NULL); 8307 if (pkt == NULL) { 8308 VHCI_DEBUG(4, (CE_NOTE, NULL, 8309 "vhci_uscsi_iostart: rval: EINVAL")); 8310 bp->b_resid = bp->b_bcount; 8311 uscmdp->uscsi_resid = bp->b_bcount; 8312 bioerror(bp, EINVAL); 8313 biodone(bp); 8314 return (EINVAL); 8315 } 8316 8317 pkt->pkt_time = uscmdp->uscsi_timeout; 8318 bcopy(uscmdp->uscsi_cdb, pkt->pkt_cdbp, (size_t)uscmdp->uscsi_cdblen); 8319 pkt->pkt_comp = vhci_uscsi_iodone; 8320 pkt->pkt_private = mp_uscmdp; 8321 if (uscmdp->uscsi_flags & USCSI_SILENT) 8322 pkt->pkt_flags |= FLAG_SILENT; 8323 if (uscmdp->uscsi_flags & USCSI_ISOLATE) 8324 pkt->pkt_flags |= FLAG_ISOLATE; 8325 if (uscmdp->uscsi_flags & USCSI_DIAGNOSE) 8326 pkt->pkt_flags |= FLAG_DIAGNOSE; 8327 if (uscmdp->uscsi_flags & USCSI_RENEGOT) { 8328 pkt->pkt_flags |= FLAG_RENEGOTIATE_WIDE_SYNC; 8329 } 8330 VHCI_DEBUG(4, (CE_WARN, NULL, 8331 "vhci_uscsi_iostart: ap: %p pkt: %p pcdbp: %p uscmdp: %p" 8332 " ucdbp: %p pcdblen: %d bp: %p count: %ld pip: %p" 8333 " stat_size: %d", 8334 (void *)mp_uscmdp->ap, (void *)pkt, (void *)pkt->pkt_cdbp, 8335 (void *)uscmdp, (void *)uscmdp->uscsi_cdb, pkt->pkt_cdblen, 8336 (void *)bp, bp->b_bcount, (void *)mp_uscmdp->pip, stat_size)); 8337 8338 while (((rval = scsi_transport(pkt)) == TRAN_BUSY) && 8339 retry < vhci_uscsi_retry_count) { 8340 delay(drv_usectohz(vhci_uscsi_delay)); 8341 retry++; 8342 } 8343 if (retry >= vhci_uscsi_retry_count) { 8344 VHCI_DEBUG(4, (CE_NOTE, NULL, 8345 "vhci_uscsi_iostart: tran_busy - retry: %d", retry)); 8346 } 8347 switch (rval) { 8348 case TRAN_ACCEPT: 8349 rval = 0; 8350 break; 8351 8352 default: 8353 VHCI_DEBUG(4, (CE_NOTE, NULL, 8354 "vhci_uscsi_iostart: rval: %d count: %ld res: %ld", 8355 rval, bp->b_bcount, bp->b_resid)); 8356 bp->b_resid = bp->b_bcount; 8357 uscmdp->uscsi_resid = bp->b_bcount; 8358 bioerror(bp, EIO); 8359 scsi_destroy_pkt(pkt); 8360 biodone(bp); 8361 rval = EIO; 8362 MDI_PI_ERRSTAT(mp_uscmdp->pip, MDI_PI_TRANSERR); 8363 break; 8364 } 8365 VHCI_DEBUG(4, (CE_NOTE, NULL, 8366 "vhci_uscsi_iostart: exit: rval: %d", rval)); 8367 return (rval); 8368 } 8369