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 #include "opt_acpi.h" 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/msan.h> 44 #include <sys/mutex.h> 45 #include <sys/clock.h> 46 #include <sys/proc.h> 47 #include <sys/reboot.h> 48 #include <sys/rwlock.h> 49 #include <sys/sched.h> 50 #include <sys/sysctl.h> 51 #include <sys/systm.h> 52 #include <sys/uio.h> 53 #include <sys/vmmeter.h> 54 55 #include <machine/fpu.h> 56 #include <machine/efi.h> 57 #include <machine/metadata.h> 58 #include <machine/vmparam.h> 59 60 #include <vm/vm.h> 61 #include <vm/pmap.h> 62 #include <vm/vm_map.h> 63 64 #ifdef DEV_ACPI 65 #include <contrib/dev/acpica/include/acpi.h> 66 #endif 67 68 #define EFI_TABLE_ALLOC_MAX 0x800000 69 70 static struct efi_systbl *efi_systbl; 71 static eventhandler_tag efi_shutdown_tag; 72 /* 73 * The following pointers point to tables in the EFI runtime service data pages. 74 * Care should be taken to make sure that we've properly entered the EFI runtime 75 * environment (efi_enter()) before dereferencing them. 76 */ 77 static struct efi_cfgtbl *efi_cfgtbl; 78 static struct efi_rt *efi_runtime; 79 80 static int efi_status2err[25] = { 81 0, /* EFI_SUCCESS */ 82 ENOEXEC, /* EFI_LOAD_ERROR */ 83 EINVAL, /* EFI_INVALID_PARAMETER */ 84 ENOSYS, /* EFI_UNSUPPORTED */ 85 EMSGSIZE, /* EFI_BAD_BUFFER_SIZE */ 86 EOVERFLOW, /* EFI_BUFFER_TOO_SMALL */ 87 EBUSY, /* EFI_NOT_READY */ 88 EIO, /* EFI_DEVICE_ERROR */ 89 EROFS, /* EFI_WRITE_PROTECTED */ 90 EAGAIN, /* EFI_OUT_OF_RESOURCES */ 91 EIO, /* EFI_VOLUME_CORRUPTED */ 92 ENOSPC, /* EFI_VOLUME_FULL */ 93 ENXIO, /* EFI_NO_MEDIA */ 94 ESTALE, /* EFI_MEDIA_CHANGED */ 95 ENOENT, /* EFI_NOT_FOUND */ 96 EACCES, /* EFI_ACCESS_DENIED */ 97 ETIMEDOUT, /* EFI_NO_RESPONSE */ 98 EADDRNOTAVAIL, /* EFI_NO_MAPPING */ 99 ETIMEDOUT, /* EFI_TIMEOUT */ 100 EDOOFUS, /* EFI_NOT_STARTED */ 101 EALREADY, /* EFI_ALREADY_STARTED */ 102 ECANCELED, /* EFI_ABORTED */ 103 EPROTO, /* EFI_ICMP_ERROR */ 104 EPROTO, /* EFI_TFTP_ERROR */ 105 EPROTO /* EFI_PROTOCOL_ERROR */ 106 }; 107 108 enum efi_table_type { 109 TYPE_ESRT = 0, 110 TYPE_PROP, 111 TYPE_MEMORY_ATTR 112 }; 113 114 static int efi_enter(void); 115 static void efi_leave(void); 116 117 int 118 efi_status_to_errno(efi_status status) 119 { 120 u_long code; 121 122 code = status & 0x3ffffffffffffffful; 123 return (code < nitems(efi_status2err) ? efi_status2err[code] : EDOOFUS); 124 } 125 126 static struct mtx efi_lock; 127 SYSCTL_NODE(_hw, OID_AUTO, efi, CTLFLAG_RWTUN | CTLFLAG_MPSAFE, NULL, 128 "EFI"); 129 static bool efi_poweroff = true; 130 SYSCTL_BOOL(_hw_efi, OID_AUTO, poweroff, CTLFLAG_RWTUN, &efi_poweroff, 0, 131 "If true, use EFI runtime services to power off in preference to ACPI"); 132 extern int print_efirt_faults; 133 SYSCTL_INT(_hw_efi, OID_AUTO, print_faults, CTLFLAG_RWTUN, 134 &print_efirt_faults, 0, 135 "Print fault information upon trap from EFIRT calls: " 136 "0 - never, 1 - once, 2 - always"); 137 extern u_long cnt_efirt_faults; 138 SYSCTL_ULONG(_hw_efi, OID_AUTO, total_faults, CTLFLAG_RD, 139 &cnt_efirt_faults, 0, 140 "Total number of faults that occurred during EFIRT calls"); 141 142 static bool 143 efi_is_in_map(struct efi_md *map, int ndesc, int descsz, vm_offset_t addr) 144 { 145 struct efi_md *p; 146 int i; 147 148 for (i = 0, p = map; i < ndesc; i++, p = efi_next_descriptor(p, 149 descsz)) { 150 if ((p->md_attr & EFI_MD_ATTR_RT) == 0) 151 continue; 152 153 if (addr >= p->md_virt && 154 addr < p->md_virt + p->md_pages * EFI_PAGE_SIZE) 155 return (true); 156 } 157 158 return (false); 159 } 160 161 static void 162 efi_shutdown_final(void *dummy __unused, int howto) 163 { 164 165 /* 166 * On some systems, ACPI S5 is missing or does not function properly. 167 * When present, shutdown via EFI Runtime Services instead, unless 168 * disabled. 169 */ 170 if ((howto & RB_POWEROFF) != 0 && efi_poweroff) 171 (void)efi_reset_system(EFI_RESET_SHUTDOWN); 172 } 173 174 static int 175 efi_init(void) 176 { 177 struct efi_map_header *efihdr; 178 struct efi_md *map; 179 struct efi_rt *rtdm; 180 size_t efisz; 181 int ndesc, rt_disabled; 182 183 rt_disabled = 0; 184 TUNABLE_INT_FETCH("efi.rt.disabled", &rt_disabled); 185 if (rt_disabled == 1) 186 return (0); 187 mtx_init(&efi_lock, "efi", NULL, MTX_DEF); 188 189 if (efi_systbl_phys == 0) { 190 if (bootverbose) 191 printf("EFI systbl not available\n"); 192 return (0); 193 } 194 195 efi_systbl = (struct efi_systbl *)efi_phys_to_kva(efi_systbl_phys); 196 if (efi_systbl == NULL || efi_systbl->st_hdr.th_sig != EFI_SYSTBL_SIG) { 197 efi_systbl = NULL; 198 if (bootverbose) 199 printf("EFI systbl signature invalid\n"); 200 return (0); 201 } 202 efi_cfgtbl = (efi_systbl->st_cfgtbl == 0) ? NULL : 203 (struct efi_cfgtbl *)efi_systbl->st_cfgtbl; 204 if (efi_cfgtbl == NULL) { 205 if (bootverbose) 206 printf("EFI config table is not present\n"); 207 } 208 209 efihdr = (struct efi_map_header *)preload_search_info(preload_kmdp, 210 MODINFO_METADATA | MODINFOMD_EFI_MAP); 211 if (efihdr == NULL) { 212 if (bootverbose) 213 printf("EFI map is not present\n"); 214 return (0); 215 } 216 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf; 217 map = (struct efi_md *)((uint8_t *)efihdr + efisz); 218 if (efihdr->descriptor_size == 0) 219 return (ENOMEM); 220 221 ndesc = efihdr->memory_size / efihdr->descriptor_size; 222 if (!efi_create_1t1_map(map, ndesc, efihdr->descriptor_size)) { 223 if (bootverbose) 224 printf("EFI cannot create runtime map\n"); 225 return (ENOMEM); 226 } 227 228 efi_runtime = (efi_systbl->st_rt == 0) ? NULL : 229 (struct efi_rt *)efi_systbl->st_rt; 230 if (efi_runtime == NULL) { 231 if (bootverbose) 232 printf("EFI runtime services table is not present\n"); 233 efi_destroy_1t1_map(); 234 return (ENXIO); 235 } 236 237 #if defined(__aarch64__) || defined(__amd64__) 238 /* 239 * Some UEFI implementations have multiple implementations of the 240 * RS->GetTime function. They switch from one we can only use early 241 * in the boot process to one valid as a RunTime service only when we 242 * call RS->SetVirtualAddressMap. As this is not always the case, e.g. 243 * with an old loader.efi, check if the RS->GetTime function is within 244 * the EFI map, and fail to attach if not. 245 */ 246 rtdm = (struct efi_rt *)efi_phys_to_kva((uintptr_t)efi_runtime); 247 if (rtdm == NULL || !efi_is_in_map(map, ndesc, efihdr->descriptor_size, 248 (vm_offset_t)rtdm->rt_gettime)) { 249 if (bootverbose) 250 printf( 251 "EFI runtime services table has an invalid pointer\n"); 252 efi_runtime = NULL; 253 efi_destroy_1t1_map(); 254 return (ENXIO); 255 } 256 #endif 257 258 /* 259 * We use SHUTDOWN_PRI_LAST - 1 to trigger after IPMI, but before ACPI. 260 */ 261 efi_shutdown_tag = EVENTHANDLER_REGISTER(shutdown_final, 262 efi_shutdown_final, NULL, SHUTDOWN_PRI_LAST - 1); 263 264 return (0); 265 } 266 267 static void 268 efi_uninit(void) 269 { 270 271 /* Most likely disabled by tunable */ 272 if (efi_runtime == NULL) 273 return; 274 if (efi_shutdown_tag != NULL) 275 EVENTHANDLER_DEREGISTER(shutdown_final, efi_shutdown_tag); 276 efi_destroy_1t1_map(); 277 278 efi_systbl = NULL; 279 efi_cfgtbl = NULL; 280 efi_runtime = NULL; 281 282 mtx_destroy(&efi_lock); 283 } 284 285 static int 286 rt_ok(void) 287 { 288 289 if (efi_runtime == NULL) 290 return (ENXIO); 291 return (0); 292 } 293 294 /* 295 * The fpu_kern_enter() call in allows firmware to use FPU, as 296 * mandated by the specification. It also enters a critical section, 297 * giving us neccessary protection against context switches. 298 */ 299 static int 300 efi_enter(void) 301 { 302 struct thread *td; 303 pmap_t curpmap; 304 int error; 305 306 if (efi_runtime == NULL) 307 return (ENXIO); 308 td = curthread; 309 curpmap = &td->td_proc->p_vmspace->vm_pmap; 310 PMAP_LOCK(curpmap); 311 mtx_lock(&efi_lock); 312 fpu_kern_enter(td, NULL, FPU_KERN_NOCTX); 313 error = efi_arch_enter(); 314 if (error != 0) { 315 fpu_kern_leave(td, NULL); 316 mtx_unlock(&efi_lock); 317 PMAP_UNLOCK(curpmap); 318 } else { 319 MPASS((td->td_pflags & TDP_EFIRT) == 0); 320 td->td_pflags |= TDP_EFIRT; 321 } 322 return (error); 323 } 324 325 static void 326 efi_leave(void) 327 { 328 struct thread *td; 329 pmap_t curpmap; 330 331 td = curthread; 332 MPASS((td->td_pflags & TDP_EFIRT) != 0); 333 td->td_pflags &= ~TDP_EFIRT; 334 335 efi_arch_leave(); 336 337 curpmap = &curproc->p_vmspace->vm_pmap; 338 fpu_kern_leave(td, NULL); 339 mtx_unlock(&efi_lock); 340 PMAP_UNLOCK(curpmap); 341 } 342 343 static int 344 get_table(efi_guid_t *guid, void **ptr) 345 { 346 struct efi_cfgtbl *ct; 347 u_long count; 348 int error; 349 350 if (efi_cfgtbl == NULL || efi_systbl == NULL) 351 return (ENXIO); 352 error = efi_enter(); 353 if (error != 0) 354 return (error); 355 count = efi_systbl->st_entries; 356 ct = efi_cfgtbl; 357 while (count--) { 358 if (!bcmp(&ct->ct_guid, guid, sizeof(*guid))) { 359 *ptr = ct->ct_data; 360 efi_leave(); 361 return (0); 362 } 363 ct++; 364 } 365 366 efi_leave(); 367 return (ENOENT); 368 } 369 370 static int 371 get_table_length(enum efi_table_type type, size_t *table_len, void **taddr) 372 { 373 switch (type) { 374 case TYPE_ESRT: 375 { 376 struct efi_esrt_table *esrt = NULL; 377 efi_guid_t guid = EFI_TABLE_ESRT; 378 uint32_t fw_resource_count = 0; 379 size_t len = sizeof(*esrt); 380 int error; 381 void *buf; 382 383 error = efi_get_table(&guid, (void **)&esrt); 384 if (error != 0) 385 return (error); 386 387 buf = malloc(len, M_TEMP, M_WAITOK); 388 error = physcopyout((vm_paddr_t)esrt, buf, len); 389 if (error != 0) { 390 free(buf, M_TEMP); 391 return (error); 392 } 393 394 /* Check ESRT version */ 395 if (((struct efi_esrt_table *)buf)->fw_resource_version != 396 ESRT_FIRMWARE_RESOURCE_VERSION) { 397 free(buf, M_TEMP); 398 return (ENODEV); 399 } 400 401 fw_resource_count = ((struct efi_esrt_table *)buf)-> 402 fw_resource_count; 403 if (fw_resource_count > EFI_TABLE_ALLOC_MAX / 404 sizeof(struct efi_esrt_entry_v1)) { 405 free(buf, M_TEMP); 406 return (ENOMEM); 407 } 408 409 len += fw_resource_count * sizeof(struct efi_esrt_entry_v1); 410 *table_len = len; 411 412 if (taddr != NULL) 413 *taddr = esrt; 414 free(buf, M_TEMP); 415 return (0); 416 } 417 case TYPE_PROP: 418 { 419 efi_guid_t guid = EFI_PROPERTIES_TABLE; 420 struct efi_prop_table *prop; 421 size_t len = sizeof(*prop); 422 uint32_t prop_len; 423 int error; 424 void *buf; 425 426 error = efi_get_table(&guid, (void **)&prop); 427 if (error != 0) 428 return (error); 429 430 buf = malloc(len, M_TEMP, M_WAITOK); 431 error = physcopyout((vm_paddr_t)prop, buf, len); 432 if (error != 0) { 433 free(buf, M_TEMP); 434 return (error); 435 } 436 437 prop_len = ((struct efi_prop_table *)buf)->length; 438 if (prop_len > EFI_TABLE_ALLOC_MAX) { 439 free(buf, M_TEMP); 440 return (ENOMEM); 441 } 442 *table_len = prop_len; 443 444 if (taddr != NULL) 445 *taddr = prop; 446 free(buf, M_TEMP); 447 return (0); 448 } 449 case TYPE_MEMORY_ATTR: 450 { 451 efi_guid_t guid = EFI_MEMORY_ATTRIBUTES_TABLE; 452 struct efi_memory_attribute_table *tbl_addr, *mem_addr; 453 int error; 454 void *buf; 455 size_t len = sizeof(struct efi_memory_attribute_table); 456 457 error = efi_get_table(&guid, (void **)&tbl_addr); 458 if (error) 459 return (error); 460 461 buf = malloc(len, M_TEMP, M_WAITOK); 462 error = physcopyout((vm_paddr_t)tbl_addr, buf, len); 463 if (error) { 464 free(buf, M_TEMP); 465 return (error); 466 } 467 468 mem_addr = (struct efi_memory_attribute_table *)buf; 469 if (mem_addr->version != 2) { 470 free(buf, M_TEMP); 471 return (EINVAL); 472 } 473 len += mem_addr->descriptor_size * mem_addr->num_ents; 474 if (len > EFI_TABLE_ALLOC_MAX) { 475 free(buf, M_TEMP); 476 return (ENOMEM); 477 } 478 479 *table_len = len; 480 if (taddr != NULL) 481 *taddr = tbl_addr; 482 free(buf, M_TEMP); 483 return (0); 484 } 485 } 486 return (ENOENT); 487 } 488 489 static int 490 copy_table(efi_guid_t *guid, void **buf, size_t buf_len, size_t *table_len) 491 { 492 static const struct known_table { 493 efi_guid_t guid; 494 enum efi_table_type type; 495 } tables[] = { 496 { EFI_TABLE_ESRT, TYPE_ESRT }, 497 { EFI_PROPERTIES_TABLE, TYPE_PROP }, 498 { EFI_MEMORY_ATTRIBUTES_TABLE, TYPE_MEMORY_ATTR } 499 }; 500 size_t table_idx; 501 void *taddr; 502 int rc; 503 504 for (table_idx = 0; table_idx < nitems(tables); table_idx++) { 505 if (!bcmp(&tables[table_idx].guid, guid, sizeof(*guid))) 506 break; 507 } 508 509 if (table_idx == nitems(tables)) 510 return (EINVAL); 511 512 rc = get_table_length(tables[table_idx].type, table_len, &taddr); 513 if (rc != 0) 514 return rc; 515 516 /* return table length to userspace */ 517 if (buf == NULL) 518 return (0); 519 520 *buf = malloc(*table_len, M_TEMP, M_WAITOK); 521 rc = physcopyout((vm_paddr_t)taddr, *buf, *table_len); 522 return (rc); 523 } 524 525 static int efi_rt_handle_faults = EFI_RT_HANDLE_FAULTS_DEFAULT; 526 SYSCTL_INT(_machdep, OID_AUTO, efi_rt_handle_faults, CTLFLAG_RWTUN, 527 &efi_rt_handle_faults, 0, 528 "Call EFI RT methods with fault handler wrapper around"); 529 530 static int 531 efi_rt_arch_call_nofault(struct efirt_callinfo *ec) 532 { 533 534 switch (ec->ec_argcnt) { 535 case 0: 536 ec->ec_efi_status = ((register_t EFIABI_ATTR (*)(void)) 537 ec->ec_fptr)(); 538 break; 539 case 1: 540 ec->ec_efi_status = ((register_t EFIABI_ATTR (*)(register_t)) 541 ec->ec_fptr)(ec->ec_arg1); 542 break; 543 case 2: 544 ec->ec_efi_status = ((register_t EFIABI_ATTR (*)(register_t, 545 register_t))ec->ec_fptr)(ec->ec_arg1, ec->ec_arg2); 546 break; 547 case 3: 548 ec->ec_efi_status = ((register_t EFIABI_ATTR (*)(register_t, 549 register_t, register_t))ec->ec_fptr)(ec->ec_arg1, 550 ec->ec_arg2, ec->ec_arg3); 551 break; 552 case 4: 553 ec->ec_efi_status = ((register_t EFIABI_ATTR (*)(register_t, 554 register_t, register_t, register_t))ec->ec_fptr)( 555 ec->ec_arg1, ec->ec_arg2, ec->ec_arg3, ec->ec_arg4); 556 break; 557 case 5: 558 ec->ec_efi_status = ((register_t EFIABI_ATTR (*)(register_t, 559 register_t, register_t, register_t, register_t)) 560 ec->ec_fptr)(ec->ec_arg1, ec->ec_arg2, ec->ec_arg3, 561 ec->ec_arg4, ec->ec_arg5); 562 break; 563 default: 564 panic("efi_rt_arch_call: %d args", (int)ec->ec_argcnt); 565 } 566 567 return (0); 568 } 569 570 static int 571 efi_call(struct efirt_callinfo *ecp) 572 { 573 int error; 574 575 error = efi_enter(); 576 if (error != 0) 577 return (error); 578 error = efi_rt_handle_faults ? efi_rt_arch_call(ecp) : 579 efi_rt_arch_call_nofault(ecp); 580 efi_leave(); 581 if (error == 0) 582 error = efi_status_to_errno(ecp->ec_efi_status); 583 else if (bootverbose) 584 printf("EFI %s call faulted, error %d\n", ecp->ec_name, error); 585 return (error); 586 } 587 588 #define EFI_RT_METHOD_PA(method) \ 589 ((uintptr_t)((struct efi_rt *)efi_phys_to_kva((uintptr_t) \ 590 efi_runtime))->method) 591 592 static int 593 efi_get_time_locked(struct efi_tm *tm, struct efi_tmcap *tmcap) 594 { 595 struct efirt_callinfo ec; 596 int error; 597 598 EFI_TIME_OWNED(); 599 if (efi_runtime == NULL) 600 return (ENXIO); 601 bzero(&ec, sizeof(ec)); 602 ec.ec_name = "rt_gettime"; 603 ec.ec_argcnt = 2; 604 ec.ec_arg1 = (uintptr_t)tm; 605 ec.ec_arg2 = (uintptr_t)tmcap; 606 ec.ec_fptr = EFI_RT_METHOD_PA(rt_gettime); 607 error = efi_call(&ec); 608 if (error == 0) 609 kmsan_mark(tm, sizeof(*tm), KMSAN_STATE_INITED); 610 return (error); 611 } 612 613 static int 614 get_time(struct efi_tm *tm) 615 { 616 struct efi_tmcap dummy; 617 int error; 618 619 if (efi_runtime == NULL) 620 return (ENXIO); 621 EFI_TIME_LOCK(); 622 /* 623 * UEFI spec states that the Capabilities argument to GetTime is 624 * optional, but some UEFI implementations choke when passed a NULL 625 * pointer. Pass a dummy efi_tmcap, even though we won't use it, 626 * to workaround such implementations. 627 */ 628 error = efi_get_time_locked(tm, &dummy); 629 EFI_TIME_UNLOCK(); 630 return (error); 631 } 632 633 static int 634 get_waketime(uint8_t *enabled, uint8_t *pending, struct efi_tm *tm) 635 { 636 struct efirt_callinfo ec; 637 int error; 638 #ifdef DEV_ACPI 639 UINT32 acpiRtcEnabled; 640 #endif 641 642 if (efi_runtime == NULL) 643 return (ENXIO); 644 645 EFI_TIME_LOCK(); 646 bzero(&ec, sizeof(ec)); 647 ec.ec_name = "rt_getwaketime"; 648 ec.ec_argcnt = 3; 649 ec.ec_arg1 = (uintptr_t)enabled; 650 ec.ec_arg2 = (uintptr_t)pending; 651 ec.ec_arg3 = (uintptr_t)tm; 652 ec.ec_fptr = EFI_RT_METHOD_PA(rt_getwaketime); 653 error = efi_call(&ec); 654 EFI_TIME_UNLOCK(); 655 656 #ifdef DEV_ACPI 657 if (error == 0) { 658 error = AcpiReadBitRegister(ACPI_BITREG_RT_CLOCK_ENABLE, 659 &acpiRtcEnabled); 660 if (ACPI_SUCCESS(error)) { 661 *enabled = *enabled && acpiRtcEnabled; 662 } else 663 error = EIO; 664 } 665 #endif 666 667 return (error); 668 } 669 670 static int 671 set_waketime(uint8_t enable, struct efi_tm *tm) 672 { 673 struct efirt_callinfo ec; 674 int error; 675 676 if (efi_runtime == NULL) 677 return (ENXIO); 678 679 EFI_TIME_LOCK(); 680 bzero(&ec, sizeof(ec)); 681 ec.ec_name = "rt_setwaketime"; 682 ec.ec_argcnt = 2; 683 ec.ec_arg1 = (uintptr_t)enable; 684 ec.ec_arg2 = (uintptr_t)tm; 685 ec.ec_fptr = EFI_RT_METHOD_PA(rt_setwaketime); 686 error = efi_call(&ec); 687 EFI_TIME_UNLOCK(); 688 689 #ifdef DEV_ACPI 690 if (error == 0) { 691 error = AcpiWriteBitRegister(ACPI_BITREG_RT_CLOCK_ENABLE, 692 (enable != 0) ? 1 : 0); 693 if (ACPI_FAILURE(error)) 694 error = EIO; 695 } 696 #endif 697 698 return (error); 699 } 700 701 static int 702 get_time_capabilities(struct efi_tmcap *tmcap) 703 { 704 struct efi_tm dummy; 705 int error; 706 707 if (efi_runtime == NULL) 708 return (ENXIO); 709 EFI_TIME_LOCK(); 710 error = efi_get_time_locked(&dummy, tmcap); 711 EFI_TIME_UNLOCK(); 712 return (error); 713 } 714 715 static int 716 reset_system(enum efi_reset type) 717 { 718 struct efirt_callinfo ec; 719 720 switch (type) { 721 case EFI_RESET_COLD: 722 case EFI_RESET_WARM: 723 case EFI_RESET_SHUTDOWN: 724 break; 725 default: 726 return (EINVAL); 727 } 728 if (efi_runtime == NULL) 729 return (ENXIO); 730 bzero(&ec, sizeof(ec)); 731 ec.ec_name = "rt_reset"; 732 ec.ec_argcnt = 4; 733 ec.ec_arg1 = (uintptr_t)type; 734 ec.ec_arg2 = (uintptr_t)0; 735 ec.ec_arg3 = (uintptr_t)0; 736 ec.ec_arg4 = (uintptr_t)NULL; 737 ec.ec_fptr = EFI_RT_METHOD_PA(rt_reset); 738 return (efi_call(&ec)); 739 } 740 741 static int 742 efi_set_time_locked(struct efi_tm *tm) 743 { 744 struct efirt_callinfo ec; 745 746 EFI_TIME_OWNED(); 747 if (efi_runtime == NULL) 748 return (ENXIO); 749 bzero(&ec, sizeof(ec)); 750 ec.ec_name = "rt_settime"; 751 ec.ec_argcnt = 1; 752 ec.ec_arg1 = (uintptr_t)tm; 753 ec.ec_fptr = EFI_RT_METHOD_PA(rt_settime); 754 return (efi_call(&ec)); 755 } 756 757 static int 758 set_time(struct efi_tm *tm) 759 { 760 int error; 761 762 if (efi_runtime == NULL) 763 return (ENXIO); 764 EFI_TIME_LOCK(); 765 error = efi_set_time_locked(tm); 766 EFI_TIME_UNLOCK(); 767 return (error); 768 } 769 770 static int 771 var_get(efi_char *name, efi_guid_t *vendor, uint32_t *attrib, 772 size_t *datasize, void *data) 773 { 774 struct efirt_callinfo ec; 775 int error; 776 777 if (efi_runtime == NULL) 778 return (ENXIO); 779 bzero(&ec, sizeof(ec)); 780 ec.ec_argcnt = 5; 781 ec.ec_name = "rt_getvar"; 782 ec.ec_arg1 = (uintptr_t)name; 783 ec.ec_arg2 = (uintptr_t)vendor; 784 ec.ec_arg3 = (uintptr_t)attrib; 785 ec.ec_arg4 = (uintptr_t)datasize; 786 ec.ec_arg5 = (uintptr_t)data; 787 ec.ec_fptr = EFI_RT_METHOD_PA(rt_getvar); 788 error = efi_call(&ec); 789 if (error == 0) 790 kmsan_mark(data, *datasize, KMSAN_STATE_INITED); 791 return (error); 792 } 793 794 static int 795 var_nextname(size_t *namesize, efi_char *name, efi_guid_t *vendor) 796 { 797 struct efirt_callinfo ec; 798 int error; 799 800 if (efi_runtime == NULL) 801 return (ENXIO); 802 bzero(&ec, sizeof(ec)); 803 ec.ec_argcnt = 3; 804 ec.ec_name = "rt_scanvar"; 805 ec.ec_arg1 = (uintptr_t)namesize; 806 ec.ec_arg2 = (uintptr_t)name; 807 ec.ec_arg3 = (uintptr_t)vendor; 808 ec.ec_fptr = EFI_RT_METHOD_PA(rt_scanvar); 809 error = efi_call(&ec); 810 if (error == 0) 811 kmsan_mark(name, *namesize, KMSAN_STATE_INITED); 812 return (error); 813 } 814 815 static int 816 var_set(efi_char *name, efi_guid_t *vendor, uint32_t attrib, 817 size_t datasize, void *data) 818 { 819 struct efirt_callinfo ec; 820 821 if (efi_runtime == NULL) 822 return (ENXIO); 823 bzero(&ec, sizeof(ec)); 824 ec.ec_argcnt = 5; 825 ec.ec_name = "rt_setvar"; 826 ec.ec_arg1 = (uintptr_t)name; 827 ec.ec_arg2 = (uintptr_t)vendor; 828 ec.ec_arg3 = (uintptr_t)attrib; 829 ec.ec_arg4 = (uintptr_t)datasize; 830 ec.ec_arg5 = (uintptr_t)data; 831 ec.ec_fptr = EFI_RT_METHOD_PA(rt_setvar); 832 return (efi_call(&ec)); 833 } 834 835 const static struct efi_ops efi_ops = { 836 .rt_ok = rt_ok, 837 .get_table = get_table, 838 .copy_table = copy_table, 839 .get_time = get_time, 840 .get_time_capabilities = get_time_capabilities, 841 .reset_system = reset_system, 842 .set_time = set_time, 843 .get_waketime = get_waketime, 844 .set_waketime = set_waketime, 845 .var_get = var_get, 846 .var_nextname = var_nextname, 847 .var_set = var_set, 848 }; 849 const struct efi_ops *active_efi_ops = &efi_ops; 850 851 static int 852 efirt_modevents(module_t m, int event, void *arg __unused) 853 { 854 855 switch (event) { 856 case MOD_LOAD: 857 return (efi_init()); 858 859 case MOD_UNLOAD: 860 efi_uninit(); 861 return (0); 862 863 case MOD_SHUTDOWN: 864 return (0); 865 866 default: 867 return (EOPNOTSUPP); 868 } 869 } 870 871 static moduledata_t efirt_moddata = { 872 .name = "efirt", 873 .evhand = efirt_modevents, 874 .priv = NULL, 875 }; 876 /* After fpuinitstate, before efidev */ 877 DECLARE_MODULE(efirt, efirt_moddata, SI_SUB_DRIVERS, SI_ORDER_SECOND); 878 MODULE_VERSION(efirt, 1); 879