1 /*- 2 * Copyright (c) 2004 Marcel Moolenaar 3 * Copyright (c) 2001 Doug Rabson 4 * Copyright (c) 2016, 2018 The FreeBSD Foundation 5 * All rights reserved. 6 * 7 * Portions of this software were developed by Konstantin Belousov 8 * under sponsorship from the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/efi.h> 37 #include <sys/eventhandler.h> 38 #include <sys/kernel.h> 39 #include <sys/linker.h> 40 #include <sys/lock.h> 41 #include <sys/malloc.h> 42 #include <sys/module.h> 43 #include <sys/mutex.h> 44 #include <sys/clock.h> 45 #include <sys/proc.h> 46 #include <sys/reboot.h> 47 #include <sys/rwlock.h> 48 #include <sys/sched.h> 49 #include <sys/sysctl.h> 50 #include <sys/systm.h> 51 #include <sys/uio.h> 52 #include <sys/vmmeter.h> 53 54 #include <machine/fpu.h> 55 #include <machine/efi.h> 56 #include <machine/metadata.h> 57 #include <machine/vmparam.h> 58 59 #include <vm/vm.h> 60 #include <vm/pmap.h> 61 #include <vm/vm_map.h> 62 63 #define EFI_TABLE_ALLOC_MAX 0x800000 64 65 static struct efi_systbl *efi_systbl; 66 static eventhandler_tag efi_shutdown_tag; 67 /* 68 * The following pointers point to tables in the EFI runtime service data pages. 69 * Care should be taken to make sure that we've properly entered the EFI runtime 70 * environment (efi_enter()) before dereferencing them. 71 */ 72 static struct efi_cfgtbl *efi_cfgtbl; 73 static struct efi_rt *efi_runtime; 74 75 static int efi_status2err[25] = { 76 0, /* EFI_SUCCESS */ 77 ENOEXEC, /* EFI_LOAD_ERROR */ 78 EINVAL, /* EFI_INVALID_PARAMETER */ 79 ENOSYS, /* EFI_UNSUPPORTED */ 80 EMSGSIZE, /* EFI_BAD_BUFFER_SIZE */ 81 EOVERFLOW, /* EFI_BUFFER_TOO_SMALL */ 82 EBUSY, /* EFI_NOT_READY */ 83 EIO, /* EFI_DEVICE_ERROR */ 84 EROFS, /* EFI_WRITE_PROTECTED */ 85 EAGAIN, /* EFI_OUT_OF_RESOURCES */ 86 EIO, /* EFI_VOLUME_CORRUPTED */ 87 ENOSPC, /* EFI_VOLUME_FULL */ 88 ENXIO, /* EFI_NO_MEDIA */ 89 ESTALE, /* EFI_MEDIA_CHANGED */ 90 ENOENT, /* EFI_NOT_FOUND */ 91 EACCES, /* EFI_ACCESS_DENIED */ 92 ETIMEDOUT, /* EFI_NO_RESPONSE */ 93 EADDRNOTAVAIL, /* EFI_NO_MAPPING */ 94 ETIMEDOUT, /* EFI_TIMEOUT */ 95 EDOOFUS, /* EFI_NOT_STARTED */ 96 EALREADY, /* EFI_ALREADY_STARTED */ 97 ECANCELED, /* EFI_ABORTED */ 98 EPROTO, /* EFI_ICMP_ERROR */ 99 EPROTO, /* EFI_TFTP_ERROR */ 100 EPROTO /* EFI_PROTOCOL_ERROR */ 101 }; 102 103 enum efi_table_type { 104 TYPE_ESRT = 0, 105 TYPE_PROP 106 }; 107 108 static int efi_enter(void); 109 static void efi_leave(void); 110 111 int 112 efi_status_to_errno(efi_status status) 113 { 114 u_long code; 115 116 code = status & 0x3ffffffffffffffful; 117 return (code < nitems(efi_status2err) ? efi_status2err[code] : EDOOFUS); 118 } 119 120 static struct mtx efi_lock; 121 static SYSCTL_NODE(_hw, OID_AUTO, efi, CTLFLAG_RWTUN | CTLFLAG_MPSAFE, NULL, 122 "EFI"); 123 static bool efi_poweroff = true; 124 SYSCTL_BOOL(_hw_efi, OID_AUTO, poweroff, CTLFLAG_RWTUN, &efi_poweroff, 0, 125 "If true, use EFI runtime services to power off in preference to ACPI"); 126 127 static bool 128 efi_is_in_map(struct efi_md *map, int ndesc, int descsz, vm_offset_t addr) 129 { 130 struct efi_md *p; 131 int i; 132 133 for (i = 0, p = map; i < ndesc; i++, p = efi_next_descriptor(p, 134 descsz)) { 135 if ((p->md_attr & EFI_MD_ATTR_RT) == 0) 136 continue; 137 138 if (addr >= p->md_virt && 139 addr < p->md_virt + p->md_pages * PAGE_SIZE) 140 return (true); 141 } 142 143 return (false); 144 } 145 146 static void 147 efi_shutdown_final(void *dummy __unused, int howto) 148 { 149 150 /* 151 * On some systems, ACPI S5 is missing or does not function properly. 152 * When present, shutdown via EFI Runtime Services instead, unless 153 * disabled. 154 */ 155 if ((howto & RB_POWEROFF) != 0 && efi_poweroff) 156 (void)efi_reset_system(EFI_RESET_SHUTDOWN); 157 } 158 159 static int 160 efi_init(void) 161 { 162 struct efi_map_header *efihdr; 163 struct efi_md *map; 164 struct efi_rt *rtdm; 165 caddr_t kmdp; 166 size_t efisz; 167 int ndesc, rt_disabled; 168 169 rt_disabled = 0; 170 TUNABLE_INT_FETCH("efi.rt.disabled", &rt_disabled); 171 if (rt_disabled == 1) 172 return (0); 173 mtx_init(&efi_lock, "efi", NULL, MTX_DEF); 174 175 if (efi_systbl_phys == 0) { 176 if (bootverbose) 177 printf("EFI systbl not available\n"); 178 return (0); 179 } 180 181 efi_systbl = (struct efi_systbl *)efi_phys_to_kva(efi_systbl_phys); 182 if (efi_systbl == NULL || efi_systbl->st_hdr.th_sig != EFI_SYSTBL_SIG) { 183 efi_systbl = NULL; 184 if (bootverbose) 185 printf("EFI systbl signature invalid\n"); 186 return (0); 187 } 188 efi_cfgtbl = (efi_systbl->st_cfgtbl == 0) ? NULL : 189 (struct efi_cfgtbl *)efi_systbl->st_cfgtbl; 190 if (efi_cfgtbl == NULL) { 191 if (bootverbose) 192 printf("EFI config table is not present\n"); 193 } 194 195 kmdp = preload_search_by_type("elf kernel"); 196 if (kmdp == NULL) 197 kmdp = preload_search_by_type("elf64 kernel"); 198 efihdr = (struct efi_map_header *)preload_search_info(kmdp, 199 MODINFO_METADATA | MODINFOMD_EFI_MAP); 200 if (efihdr == NULL) { 201 if (bootverbose) 202 printf("EFI map is not present\n"); 203 return (0); 204 } 205 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf; 206 map = (struct efi_md *)((uint8_t *)efihdr + efisz); 207 if (efihdr->descriptor_size == 0) 208 return (ENOMEM); 209 210 ndesc = efihdr->memory_size / efihdr->descriptor_size; 211 if (!efi_create_1t1_map(map, ndesc, efihdr->descriptor_size)) { 212 if (bootverbose) 213 printf("EFI cannot create runtime map\n"); 214 return (ENOMEM); 215 } 216 217 efi_runtime = (efi_systbl->st_rt == 0) ? NULL : 218 (struct efi_rt *)efi_systbl->st_rt; 219 if (efi_runtime == NULL) { 220 if (bootverbose) 221 printf("EFI runtime services table is not present\n"); 222 efi_destroy_1t1_map(); 223 return (ENXIO); 224 } 225 226 #if defined(__aarch64__) || defined(__amd64__) 227 /* 228 * Some UEFI implementations have multiple implementations of the 229 * RS->GetTime function. They switch from one we can only use early 230 * in the boot process to one valid as a RunTime service only when we 231 * call RS->SetVirtualAddressMap. As this is not always the case, e.g. 232 * with an old loader.efi, check if the RS->GetTime function is within 233 * the EFI map, and fail to attach if not. 234 */ 235 rtdm = (struct efi_rt *)efi_phys_to_kva((uintptr_t)efi_runtime); 236 if (rtdm == NULL || !efi_is_in_map(map, ndesc, efihdr->descriptor_size, 237 (vm_offset_t)rtdm->rt_gettime)) { 238 if (bootverbose) 239 printf( 240 "EFI runtime services table has an invalid pointer\n"); 241 efi_runtime = NULL; 242 efi_destroy_1t1_map(); 243 return (ENXIO); 244 } 245 #endif 246 247 /* 248 * We use SHUTDOWN_PRI_LAST - 1 to trigger after IPMI, but before ACPI. 249 */ 250 efi_shutdown_tag = EVENTHANDLER_REGISTER(shutdown_final, 251 efi_shutdown_final, NULL, SHUTDOWN_PRI_LAST - 1); 252 253 return (0); 254 } 255 256 static void 257 efi_uninit(void) 258 { 259 260 /* Most likely disabled by tunable */ 261 if (efi_runtime == NULL) 262 return; 263 if (efi_shutdown_tag != NULL) 264 EVENTHANDLER_DEREGISTER(shutdown_final, efi_shutdown_tag); 265 efi_destroy_1t1_map(); 266 267 efi_systbl = NULL; 268 efi_cfgtbl = NULL; 269 efi_runtime = NULL; 270 271 mtx_destroy(&efi_lock); 272 } 273 274 static int 275 rt_ok(void) 276 { 277 278 if (efi_runtime == NULL) 279 return (ENXIO); 280 return (0); 281 } 282 283 static int 284 efi_enter(void) 285 { 286 struct thread *td; 287 pmap_t curpmap; 288 int error; 289 290 if (efi_runtime == NULL) 291 return (ENXIO); 292 td = curthread; 293 curpmap = &td->td_proc->p_vmspace->vm_pmap; 294 PMAP_LOCK(curpmap); 295 mtx_lock(&efi_lock); 296 fpu_kern_enter(td, NULL, FPU_KERN_NOCTX); 297 error = efi_arch_enter(); 298 if (error != 0) { 299 fpu_kern_leave(td, NULL); 300 mtx_unlock(&efi_lock); 301 PMAP_UNLOCK(curpmap); 302 } 303 return (error); 304 } 305 306 static void 307 efi_leave(void) 308 { 309 struct thread *td; 310 pmap_t curpmap; 311 312 efi_arch_leave(); 313 314 curpmap = &curproc->p_vmspace->vm_pmap; 315 td = curthread; 316 fpu_kern_leave(td, NULL); 317 mtx_unlock(&efi_lock); 318 PMAP_UNLOCK(curpmap); 319 } 320 321 static int 322 get_table(struct uuid *uuid, void **ptr) 323 { 324 struct efi_cfgtbl *ct; 325 u_long count; 326 int error; 327 328 if (efi_cfgtbl == NULL || efi_systbl == NULL) 329 return (ENXIO); 330 error = efi_enter(); 331 if (error != 0) 332 return (error); 333 count = efi_systbl->st_entries; 334 ct = efi_cfgtbl; 335 while (count--) { 336 if (!bcmp(&ct->ct_uuid, uuid, sizeof(*uuid))) { 337 *ptr = ct->ct_data; 338 efi_leave(); 339 return (0); 340 } 341 ct++; 342 } 343 344 efi_leave(); 345 return (ENOENT); 346 } 347 348 static int 349 get_table_length(enum efi_table_type type, size_t *table_len, void **taddr) 350 { 351 switch (type) { 352 case TYPE_ESRT: 353 { 354 struct efi_esrt_table *esrt = NULL; 355 struct uuid uuid = EFI_TABLE_ESRT; 356 uint32_t fw_resource_count = 0; 357 size_t len = sizeof(*esrt); 358 int error; 359 void *buf; 360 361 error = efi_get_table(&uuid, (void **)&esrt); 362 if (error != 0) 363 return (error); 364 365 buf = malloc(len, M_TEMP, M_WAITOK); 366 error = physcopyout((vm_paddr_t)esrt, buf, len); 367 if (error != 0) { 368 free(buf, M_TEMP); 369 return (error); 370 } 371 372 /* Check ESRT version */ 373 if (((struct efi_esrt_table *)buf)->fw_resource_version != 374 ESRT_FIRMWARE_RESOURCE_VERSION) { 375 free(buf, M_TEMP); 376 return (ENODEV); 377 } 378 379 fw_resource_count = ((struct efi_esrt_table *)buf)-> 380 fw_resource_count; 381 if (fw_resource_count > EFI_TABLE_ALLOC_MAX / 382 sizeof(struct efi_esrt_entry_v1)) { 383 free(buf, M_TEMP); 384 return (ENOMEM); 385 } 386 387 len += fw_resource_count * sizeof(struct efi_esrt_entry_v1); 388 *table_len = len; 389 390 if (taddr != NULL) 391 *taddr = esrt; 392 free(buf, M_TEMP); 393 return (0); 394 } 395 case TYPE_PROP: 396 { 397 struct uuid uuid = EFI_PROPERTIES_TABLE; 398 struct efi_prop_table *prop; 399 size_t len = sizeof(*prop); 400 uint32_t prop_len; 401 int error; 402 void *buf; 403 404 error = efi_get_table(&uuid, (void **)&prop); 405 if (error != 0) 406 return (error); 407 408 buf = malloc(len, M_TEMP, M_WAITOK); 409 error = physcopyout((vm_paddr_t)prop, buf, len); 410 if (error != 0) { 411 free(buf, M_TEMP); 412 return (error); 413 } 414 415 prop_len = ((struct efi_prop_table *)buf)->length; 416 if (prop_len > EFI_TABLE_ALLOC_MAX) { 417 free(buf, M_TEMP); 418 return (ENOMEM); 419 } 420 *table_len = prop_len; 421 422 if (taddr != NULL) 423 *taddr = prop; 424 free(buf, M_TEMP); 425 return (0); 426 } 427 } 428 return (ENOENT); 429 } 430 431 static int 432 copy_table(struct uuid *uuid, void **buf, size_t buf_len, size_t *table_len) 433 { 434 static const struct known_table { 435 struct uuid uuid; 436 enum efi_table_type type; 437 } tables[] = { 438 { EFI_TABLE_ESRT, TYPE_ESRT }, 439 { EFI_PROPERTIES_TABLE, TYPE_PROP } 440 }; 441 size_t table_idx; 442 void *taddr; 443 int rc; 444 445 for (table_idx = 0; table_idx < nitems(tables); table_idx++) { 446 if (!bcmp(&tables[table_idx].uuid, uuid, sizeof(*uuid))) 447 break; 448 } 449 450 if (table_idx == nitems(tables)) 451 return (EINVAL); 452 453 rc = get_table_length(tables[table_idx].type, table_len, &taddr); 454 if (rc != 0) 455 return rc; 456 457 /* return table length to userspace */ 458 if (buf == NULL) 459 return (0); 460 461 *buf = malloc(*table_len, M_TEMP, M_WAITOK); 462 rc = physcopyout((vm_paddr_t)taddr, *buf, *table_len); 463 return (rc); 464 } 465 466 static int efi_rt_handle_faults = EFI_RT_HANDLE_FAULTS_DEFAULT; 467 SYSCTL_INT(_machdep, OID_AUTO, efi_rt_handle_faults, CTLFLAG_RWTUN, 468 &efi_rt_handle_faults, 0, 469 "Call EFI RT methods with fault handler wrapper around"); 470 471 static int 472 efi_rt_arch_call_nofault(struct efirt_callinfo *ec) 473 { 474 475 switch (ec->ec_argcnt) { 476 case 0: 477 ec->ec_efi_status = ((register_t (*)(void))ec->ec_fptr)(); 478 break; 479 case 1: 480 ec->ec_efi_status = ((register_t (*)(register_t))ec->ec_fptr) 481 (ec->ec_arg1); 482 break; 483 case 2: 484 ec->ec_efi_status = ((register_t (*)(register_t, register_t)) 485 ec->ec_fptr)(ec->ec_arg1, ec->ec_arg2); 486 break; 487 case 3: 488 ec->ec_efi_status = ((register_t (*)(register_t, register_t, 489 register_t))ec->ec_fptr)(ec->ec_arg1, ec->ec_arg2, 490 ec->ec_arg3); 491 break; 492 case 4: 493 ec->ec_efi_status = ((register_t (*)(register_t, register_t, 494 register_t, register_t))ec->ec_fptr)(ec->ec_arg1, 495 ec->ec_arg2, ec->ec_arg3, ec->ec_arg4); 496 break; 497 case 5: 498 ec->ec_efi_status = ((register_t (*)(register_t, register_t, 499 register_t, register_t, register_t))ec->ec_fptr)( 500 ec->ec_arg1, ec->ec_arg2, ec->ec_arg3, ec->ec_arg4, 501 ec->ec_arg5); 502 break; 503 default: 504 panic("efi_rt_arch_call: %d args", (int)ec->ec_argcnt); 505 } 506 507 return (0); 508 } 509 510 static int 511 efi_call(struct efirt_callinfo *ecp) 512 { 513 int error; 514 515 error = efi_enter(); 516 if (error != 0) 517 return (error); 518 error = efi_rt_handle_faults ? efi_rt_arch_call(ecp) : 519 efi_rt_arch_call_nofault(ecp); 520 efi_leave(); 521 if (error == 0) 522 error = efi_status_to_errno(ecp->ec_efi_status); 523 else if (bootverbose) 524 printf("EFI %s call faulted, error %d\n", ecp->ec_name, error); 525 return (error); 526 } 527 528 #define EFI_RT_METHOD_PA(method) \ 529 ((uintptr_t)((struct efi_rt *)efi_phys_to_kva((uintptr_t) \ 530 efi_runtime))->method) 531 532 static int 533 efi_get_time_locked(struct efi_tm *tm, struct efi_tmcap *tmcap) 534 { 535 struct efirt_callinfo ec; 536 537 EFI_TIME_OWNED(); 538 if (efi_runtime == NULL) 539 return (ENXIO); 540 bzero(&ec, sizeof(ec)); 541 ec.ec_name = "rt_gettime"; 542 ec.ec_argcnt = 2; 543 ec.ec_arg1 = (uintptr_t)tm; 544 ec.ec_arg2 = (uintptr_t)tmcap; 545 ec.ec_fptr = EFI_RT_METHOD_PA(rt_gettime); 546 return (efi_call(&ec)); 547 } 548 549 static int 550 get_time(struct efi_tm *tm) 551 { 552 struct efi_tmcap dummy; 553 int error; 554 555 if (efi_runtime == NULL) 556 return (ENXIO); 557 EFI_TIME_LOCK(); 558 /* 559 * UEFI spec states that the Capabilities argument to GetTime is 560 * optional, but some UEFI implementations choke when passed a NULL 561 * pointer. Pass a dummy efi_tmcap, even though we won't use it, 562 * to workaround such implementations. 563 */ 564 error = efi_get_time_locked(tm, &dummy); 565 EFI_TIME_UNLOCK(); 566 return (error); 567 } 568 569 static int 570 get_time_capabilities(struct efi_tmcap *tmcap) 571 { 572 struct efi_tm dummy; 573 int error; 574 575 if (efi_runtime == NULL) 576 return (ENXIO); 577 EFI_TIME_LOCK(); 578 error = efi_get_time_locked(&dummy, tmcap); 579 EFI_TIME_UNLOCK(); 580 return (error); 581 } 582 583 static int 584 reset_system(enum efi_reset type) 585 { 586 struct efirt_callinfo ec; 587 588 switch (type) { 589 case EFI_RESET_COLD: 590 case EFI_RESET_WARM: 591 case EFI_RESET_SHUTDOWN: 592 break; 593 default: 594 return (EINVAL); 595 } 596 if (efi_runtime == NULL) 597 return (ENXIO); 598 bzero(&ec, sizeof(ec)); 599 ec.ec_name = "rt_reset"; 600 ec.ec_argcnt = 4; 601 ec.ec_arg1 = (uintptr_t)type; 602 ec.ec_arg2 = (uintptr_t)0; 603 ec.ec_arg3 = (uintptr_t)0; 604 ec.ec_arg4 = (uintptr_t)NULL; 605 ec.ec_fptr = EFI_RT_METHOD_PA(rt_reset); 606 return (efi_call(&ec)); 607 } 608 609 static int 610 efi_set_time_locked(struct efi_tm *tm) 611 { 612 struct efirt_callinfo ec; 613 614 EFI_TIME_OWNED(); 615 if (efi_runtime == NULL) 616 return (ENXIO); 617 bzero(&ec, sizeof(ec)); 618 ec.ec_name = "rt_settime"; 619 ec.ec_argcnt = 1; 620 ec.ec_arg1 = (uintptr_t)tm; 621 ec.ec_fptr = EFI_RT_METHOD_PA(rt_settime); 622 return (efi_call(&ec)); 623 } 624 625 static int 626 set_time(struct efi_tm *tm) 627 { 628 int error; 629 630 if (efi_runtime == NULL) 631 return (ENXIO); 632 EFI_TIME_LOCK(); 633 error = efi_set_time_locked(tm); 634 EFI_TIME_UNLOCK(); 635 return (error); 636 } 637 638 static int 639 var_get(efi_char *name, struct uuid *vendor, uint32_t *attrib, 640 size_t *datasize, void *data) 641 { 642 struct efirt_callinfo ec; 643 644 if (efi_runtime == NULL) 645 return (ENXIO); 646 bzero(&ec, sizeof(ec)); 647 ec.ec_argcnt = 5; 648 ec.ec_name = "rt_getvar"; 649 ec.ec_arg1 = (uintptr_t)name; 650 ec.ec_arg2 = (uintptr_t)vendor; 651 ec.ec_arg3 = (uintptr_t)attrib; 652 ec.ec_arg4 = (uintptr_t)datasize; 653 ec.ec_arg5 = (uintptr_t)data; 654 ec.ec_fptr = EFI_RT_METHOD_PA(rt_getvar); 655 return (efi_call(&ec)); 656 } 657 658 static int 659 var_nextname(size_t *namesize, efi_char *name, struct uuid *vendor) 660 { 661 struct efirt_callinfo ec; 662 663 if (efi_runtime == NULL) 664 return (ENXIO); 665 bzero(&ec, sizeof(ec)); 666 ec.ec_argcnt = 3; 667 ec.ec_name = "rt_scanvar"; 668 ec.ec_arg1 = (uintptr_t)namesize; 669 ec.ec_arg2 = (uintptr_t)name; 670 ec.ec_arg3 = (uintptr_t)vendor; 671 ec.ec_fptr = EFI_RT_METHOD_PA(rt_scanvar); 672 return (efi_call(&ec)); 673 } 674 675 static int 676 var_set(efi_char *name, struct uuid *vendor, uint32_t attrib, 677 size_t datasize, void *data) 678 { 679 struct efirt_callinfo ec; 680 681 if (efi_runtime == NULL) 682 return (ENXIO); 683 bzero(&ec, sizeof(ec)); 684 ec.ec_argcnt = 5; 685 ec.ec_name = "rt_setvar"; 686 ec.ec_arg1 = (uintptr_t)name; 687 ec.ec_arg2 = (uintptr_t)vendor; 688 ec.ec_arg3 = (uintptr_t)attrib; 689 ec.ec_arg4 = (uintptr_t)datasize; 690 ec.ec_arg5 = (uintptr_t)data; 691 ec.ec_fptr = EFI_RT_METHOD_PA(rt_setvar); 692 return (efi_call(&ec)); 693 } 694 695 const static struct efi_ops efi_ops = { 696 .rt_ok = rt_ok, 697 .get_table = get_table, 698 .copy_table = copy_table, 699 .get_time = get_time, 700 .get_time_capabilities = get_time_capabilities, 701 .reset_system = reset_system, 702 .set_time = set_time, 703 .var_get = var_get, 704 .var_nextname = var_nextname, 705 .var_set = var_set, 706 }; 707 const struct efi_ops *active_efi_ops = &efi_ops; 708 709 static int 710 efirt_modevents(module_t m, int event, void *arg __unused) 711 { 712 713 switch (event) { 714 case MOD_LOAD: 715 return (efi_init()); 716 717 case MOD_UNLOAD: 718 efi_uninit(); 719 return (0); 720 721 case MOD_SHUTDOWN: 722 return (0); 723 724 default: 725 return (EOPNOTSUPP); 726 } 727 } 728 729 static moduledata_t efirt_moddata = { 730 .name = "efirt", 731 .evhand = efirt_modevents, 732 .priv = NULL, 733 }; 734 /* After fpuinitstate, before efidev */ 735 DECLARE_MODULE(efirt, efirt_moddata, SI_SUB_DRIVERS, SI_ORDER_SECOND); 736 MODULE_VERSION(efirt, 1); 737