1/*- 2 * Copyright (c) 2017 The FreeBSD Foundation 3 * All rights reserved. 4 * Copyright (c) 2018, 2019 Intel Corporation 5 * 6 * This software was developed by Konstantin Belousov <kib@FreeBSD.org> 7 * under sponsorship from the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD$"); 33 34#include "opt_acpi.h" 35#include "opt_ddb.h" 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/bio.h> 40#include <sys/bitstring.h> 41#include <sys/bus.h> 42#include <sys/kernel.h> 43#include <sys/lock.h> 44#include <sys/malloc.h> 45#include <sys/module.h> 46#include <sys/sbuf.h> 47#include <sys/sysctl.h> 48#include <sys/uuid.h> 49#include <contrib/dev/acpica/include/acpi.h> 50#include <contrib/dev/acpica/include/accommon.h> 51#include <contrib/dev/acpica/include/acuuid.h> 52#include <dev/acpica/acpivar.h> 53#include <dev/nvdimm/nvdimm_var.h> 54 55#define _COMPONENT ACPI_OEM 56ACPI_MODULE_NAME("NVDIMM") 57 58static struct uuid intel_nvdimm_dsm_uuid = 59 {0x4309AC30,0x0D11,0x11E4,0x91,0x91,{0x08,0x00,0x20,0x0C,0x9A,0x66}}; 60#define INTEL_NVDIMM_DSM_REV 1 61#define INTEL_NVDIMM_DSM_GET_LABEL_SIZE 4 62#define INTEL_NVDIMM_DSM_GET_LABEL_DATA 5 63 64static devclass_t nvdimm_devclass; 65static devclass_t nvdimm_root_devclass; 66MALLOC_DEFINE(M_NVDIMM, "nvdimm", "NVDIMM driver memory"); 67 68static int 69read_label_area_size(struct nvdimm_dev *nv) 70{ 71 ACPI_OBJECT *result_buffer; 72 ACPI_HANDLE handle; 73 ACPI_STATUS status; 74 ACPI_BUFFER result; 75 uint32_t *out; 76 int error; 77 78 handle = nvdimm_root_get_acpi_handle(nv->nv_dev); 79 if (handle == NULL) 80 return (ENODEV); 81 result.Length = ACPI_ALLOCATE_BUFFER; 82 result.Pointer = NULL; 83 status = acpi_EvaluateDSM(handle, (uint8_t *)&intel_nvdimm_dsm_uuid, 84 INTEL_NVDIMM_DSM_REV, INTEL_NVDIMM_DSM_GET_LABEL_SIZE, NULL, 85 &result); 86 error = ENXIO; 87 if (ACPI_SUCCESS(status) && result.Pointer != NULL && 88 result.Length >= sizeof(ACPI_OBJECT)) { 89 result_buffer = result.Pointer; 90 if (result_buffer->Type == ACPI_TYPE_BUFFER && 91 result_buffer->Buffer.Length >= 12) { 92 out = (uint32_t *)result_buffer->Buffer.Pointer; 93 nv->label_area_size = out[1]; 94 nv->max_label_xfer = out[2]; 95 error = 0; 96 } 97 } 98 if (result.Pointer != NULL) 99 AcpiOsFree(result.Pointer); 100 return (error); 101} 102 103static int 104read_label_area(struct nvdimm_dev *nv, uint8_t *dest, off_t offset, 105 off_t length) 106{ 107 ACPI_BUFFER result; 108 ACPI_HANDLE handle; 109 ACPI_OBJECT params_pkg, params_buf, *result_buf; 110 ACPI_STATUS status; 111 uint32_t params[2]; 112 off_t to_read; 113 int error; 114 115 error = 0; 116 handle = nvdimm_root_get_acpi_handle(nv->nv_dev); 117 if (offset < 0 || length <= 0 || 118 offset + length > nv->label_area_size || 119 handle == NULL) 120 return (ENODEV); 121 params_pkg.Type = ACPI_TYPE_PACKAGE; 122 params_pkg.Package.Count = 1; 123 params_pkg.Package.Elements = ¶ms_buf; 124 params_buf.Type = ACPI_TYPE_BUFFER; 125 params_buf.Buffer.Length = sizeof(params); 126 params_buf.Buffer.Pointer = (UINT8 *)params; 127 while (length > 0) { 128 to_read = MIN(length, nv->max_label_xfer); 129 params[0] = offset; 130 params[1] = to_read; 131 result.Length = ACPI_ALLOCATE_BUFFER; 132 result.Pointer = NULL; 133 status = acpi_EvaluateDSM(handle, 134 (uint8_t *)&intel_nvdimm_dsm_uuid, INTEL_NVDIMM_DSM_REV, 135 INTEL_NVDIMM_DSM_GET_LABEL_DATA, ¶ms_pkg, &result); 136 if (ACPI_FAILURE(status) || 137 result.Length < sizeof(ACPI_OBJECT) || 138 result.Pointer == NULL) { 139 error = ENXIO; 140 break; 141 } 142 result_buf = (ACPI_OBJECT *)result.Pointer; 143 if (result_buf->Type != ACPI_TYPE_BUFFER || 144 result_buf->Buffer.Pointer == NULL || 145 result_buf->Buffer.Length != 4 + to_read || 146 ((uint16_t *)result_buf->Buffer.Pointer)[0] != 0) { 147 error = ENXIO; 148 break; 149 } 150 bcopy(result_buf->Buffer.Pointer + 4, dest, to_read); 151 dest += to_read; 152 offset += to_read; 153 length -= to_read; 154 if (result.Pointer != NULL) { 155 AcpiOsFree(result.Pointer); 156 result.Pointer = NULL; 157 } 158 } 159 if (result.Pointer != NULL) 160 AcpiOsFree(result.Pointer); 161 return (error); 162} 163 164static uint64_t 165fletcher64(const void *data, size_t length) 166{ 167 size_t i; 168 uint32_t a, b; 169 const uint32_t *d; 170 171 a = 0; 172 b = 0; 173 d = (const uint32_t *)data; 174 length = length / sizeof(uint32_t); 175 for (i = 0; i < length; i++) { 176 a += d[i]; 177 b += a; 178 } 179 return ((uint64_t)b << 32 | a); 180} 181 182static bool 183label_index_is_valid(struct nvdimm_label_index *index, uint32_t max_labels, 184 size_t size, size_t offset) 185{ 186 uint64_t checksum; 187 188 index = (struct nvdimm_label_index *)((uint8_t *)index + offset); 189 if (strcmp(index->signature, NVDIMM_INDEX_BLOCK_SIGNATURE) != 0) 190 return false; 191 checksum = index->checksum; 192 index->checksum = 0; 193 if (checksum != fletcher64(index, size) || 194 index->this_offset != size * offset || index->this_size != size || 195 index->other_offset != size * (offset == 0 ? 1 : 0) || 196 index->seq == 0 || index->seq > 3 || index->slot_cnt > max_labels || 197 index->label_size != 1) 198 return false; 199 return true; 200} 201 202static int 203read_label(struct nvdimm_dev *nv, int num) 204{ 205 struct nvdimm_label_entry *entry, *i, *next; 206 uint64_t checksum; 207 off_t offset; 208 int error; 209 210 offset = nv->label_index->label_offset + 211 num * (128 << nv->label_index->label_size); 212 entry = malloc(sizeof(*entry), M_NVDIMM, M_WAITOK); 213 error = read_label_area(nv, (uint8_t *)&entry->label, offset, 214 sizeof(struct nvdimm_label)); 215 if (error != 0) { 216 free(entry, M_NVDIMM); 217 return (error); 218 } 219 checksum = entry->label.checksum; 220 entry->label.checksum = 0; 221 if (checksum != fletcher64(&entry->label, sizeof(entry->label)) || 222 entry->label.slot != num) { 223 free(entry, M_NVDIMM); 224 return (ENXIO); 225 } 226 227 /* Insertion ordered by dimm_phys_addr */ 228 if (SLIST_EMPTY(&nv->labels) || 229 entry->label.dimm_phys_addr <= 230 SLIST_FIRST(&nv->labels)->label.dimm_phys_addr) { 231 SLIST_INSERT_HEAD(&nv->labels, entry, link); 232 return (0); 233 } 234 SLIST_FOREACH_SAFE(i, &nv->labels, link, next) { 235 if (next == NULL || 236 entry->label.dimm_phys_addr <= next->label.dimm_phys_addr) { 237 SLIST_INSERT_AFTER(i, entry, link); 238 return (0); 239 } 240 } 241 __assert_unreachable(); 242} 243 244static int 245read_labels(struct nvdimm_dev *nv) 246{ 247 struct nvdimm_label_index *indices; 248 size_t bitfield_size, index_size, num_labels; 249 int error, n; 250 bool index_0_valid, index_1_valid; 251 252 for (index_size = 256; ; index_size += 256) { 253 num_labels = 8 * (index_size - 254 sizeof(struct nvdimm_label_index)); 255 if (index_size + num_labels * sizeof(struct nvdimm_label) >= 256 nv->label_area_size) 257 break; 258 } 259 num_labels = (nv->label_area_size - index_size) / 260 sizeof(struct nvdimm_label); 261 bitfield_size = roundup2(num_labels, 8) / 8; 262 indices = malloc(2 * index_size, M_NVDIMM, M_WAITOK); 263 error = read_label_area(nv, (void *)indices, 0, 2 * index_size); 264 if (error != 0) { 265 free(indices, M_NVDIMM); 266 return (error); 267 } 268 index_0_valid = label_index_is_valid(indices, num_labels, index_size, 269 0); 270 index_1_valid = label_index_is_valid(indices, num_labels, index_size, 271 1); 272 if (!index_0_valid && !index_1_valid) { 273 free(indices, M_NVDIMM); 274 return (ENXIO); 275 } 276 if (index_0_valid && index_1_valid && 277 (indices[1].seq > indices[0].seq || 278 (indices[1].seq == 1 && indices[0].seq == 3))) 279 index_0_valid = false; 280 nv->label_index = malloc(index_size, M_NVDIMM, M_WAITOK); 281 bcopy(indices + (index_0_valid ? 0 : 1), nv->label_index, index_size); 282 free(indices, M_NVDIMM); 283 for (bit_ffc_at((bitstr_t *)nv->label_index->free, 0, num_labels, &n); 284 n >= 0; 285 bit_ffc_at((bitstr_t *)nv->label_index->free, n + 1, num_labels, 286 &n)) { 287 read_label(nv, n); 288 } 289 return (0); 290} 291 292struct nvdimm_dev * 293nvdimm_find_by_handle(nfit_handle_t nv_handle) 294{ 295 struct nvdimm_dev *res; 296 device_t *dimms; 297 int i, error, num_dimms; 298 299 res = NULL; 300 error = devclass_get_devices(nvdimm_devclass, &dimms, &num_dimms); 301 if (error != 0) 302 return (NULL); 303 for (i = 0; i < num_dimms; i++) { 304 if (nvdimm_root_get_device_handle(dimms[i]) == nv_handle) { 305 res = device_get_softc(dimms[i]); 306 break; 307 } 308 } 309 free(dimms, M_TEMP); 310 return (res); 311} 312 313static int 314nvdimm_probe(device_t dev) 315{ 316 317 return (BUS_PROBE_NOWILDCARD); 318} 319 320static int 321nvdimm_attach(device_t dev) 322{ 323 struct nvdimm_dev *nv; 324 struct sysctl_ctx_list *ctx; 325 struct sysctl_oid *oid; 326 struct sysctl_oid_list *children; 327 struct sbuf *sb; 328 ACPI_TABLE_NFIT *nfitbl; 329 ACPI_HANDLE handle; 330 ACPI_STATUS status; 331 ACPI_NFIT_MEMORY_MAP **maps; 332 int error, i, num_maps; 333 uint16_t flags; 334 335 nv = device_get_softc(dev); 336 ctx = device_get_sysctl_ctx(dev); 337 oid = device_get_sysctl_tree(dev); 338 children = SYSCTL_CHILDREN(oid); 339 handle = nvdimm_root_get_acpi_handle(dev); 340 if (handle == NULL) 341 return (EINVAL); 342 nv->nv_dev = dev; 343 nv->nv_handle = nvdimm_root_get_device_handle(dev); 344 345 status = AcpiGetTable(ACPI_SIG_NFIT, 1, (ACPI_TABLE_HEADER **)&nfitbl); 346 if (ACPI_FAILURE(status)) { 347 if (bootverbose) 348 device_printf(dev, "cannot get NFIT\n"); 349 return (ENXIO); 350 } 351 acpi_nfit_get_flush_addrs(nfitbl, nv->nv_handle, &nv->nv_flush_addr, 352 &nv->nv_flush_addr_cnt); 353 354 /* 355 * Each NVDIMM should have at least one memory map associated with it. 356 * If any of the maps have one of the error flags set, reflect that in 357 * the overall status. 358 */ 359 acpi_nfit_get_memory_maps_by_dimm(nfitbl, nv->nv_handle, &maps, 360 &num_maps); 361 if (num_maps == 0) { 362 free(nv->nv_flush_addr, M_NVDIMM); 363 free(maps, M_NVDIMM); 364 device_printf(dev, "cannot find memory map\n"); 365 return (ENXIO); 366 } 367 flags = 0; 368 for (i = 0; i < num_maps; i++) { 369 flags |= maps[i]->Flags; 370 } 371 free(maps, M_NVDIMM); 372 373 /* sbuf_new_auto(9) is M_WAITOK; no need to check for NULL. */ 374 sb = sbuf_new_auto(); 375 (void) sbuf_printf(sb, "0x%b", flags, 376 "\20" 377 "\001SAVE_FAILED" 378 "\002RESTORE_FAILED" 379 "\003FLUSH_FAILED" 380 "\004NOT_ARMED" 381 "\005HEALTH_OBSERVED" 382 "\006HEALTH_ENABLED" 383 "\007MAP_FAILED"); 384 error = sbuf_finish(sb); 385 if (error != 0) { 386 sbuf_delete(sb); 387 free(nv->nv_flush_addr, M_NVDIMM); 388 device_printf(dev, "cannot convert flags to string\n"); 389 return (error); 390 } 391 /* strdup(9) is M_WAITOK; no need to check for NULL. */ 392 nv->nv_flags_str = strdup(sbuf_data(sb), M_NVDIMM); 393 sbuf_delete(sb); 394 SYSCTL_ADD_STRING(ctx, children, OID_AUTO, "flags", 395 CTLFLAG_RD | CTLFLAG_MPSAFE, nv->nv_flags_str, 0, 396 "NVDIMM State Flags"); 397 /* 398 * Anything other than HEALTH_ENABLED indicates a fault condition of 399 * some kind, so log if that's seen. 400 */ 401 if ((flags & ~ACPI_NFIT_MEM_HEALTH_ENABLED) != 0) 402 device_printf(dev, "flags: %s\n", nv->nv_flags_str); 403 404 AcpiPutTable(&nfitbl->Header); 405 error = read_label_area_size(nv); 406 if (error == 0) { 407 /* 408 * Ignoring errors reading labels. Not all NVDIMMs 409 * support labels and namespaces. 410 */ 411 read_labels(nv); 412 } 413 return (0); 414} 415 416static int 417nvdimm_detach(device_t dev) 418{ 419 struct nvdimm_dev *nv; 420 struct nvdimm_label_entry *label, *next; 421 422 nv = device_get_softc(dev); 423 free(nv->nv_flags_str, M_NVDIMM); 424 free(nv->nv_flush_addr, M_NVDIMM); 425 free(nv->label_index, M_NVDIMM); 426 SLIST_FOREACH_SAFE(label, &nv->labels, link, next) { 427 SLIST_REMOVE_HEAD(&nv->labels, link); 428 free(label, M_NVDIMM); 429 } 430 return (0); 431} 432 433static int 434nvdimm_suspend(device_t dev) 435{ 436 437 return (0); 438} 439 440static int 441nvdimm_resume(device_t dev) 442{ 443 444 return (0); 445} 446 447static ACPI_STATUS 448find_dimm(ACPI_HANDLE handle, UINT32 nesting_level, void *context, 449 void **return_value) 450{ 451 ACPI_DEVICE_INFO *device_info; 452 ACPI_STATUS status; 453 454 status = AcpiGetObjectInfo(handle, &device_info); 455 if (ACPI_FAILURE(status)) 456 return_ACPI_STATUS(AE_ERROR); 457 if (device_info->Address == (uintptr_t)context) { 458 *(ACPI_HANDLE *)return_value = handle; 459 return_ACPI_STATUS(AE_CTRL_TERMINATE); 460 } 461 return_ACPI_STATUS(AE_OK); 462} 463 464static ACPI_HANDLE 465get_dimm_acpi_handle(ACPI_HANDLE root_handle, nfit_handle_t adr) 466{ 467 ACPI_HANDLE res; 468 ACPI_STATUS status; 469 470 res = NULL; 471 status = AcpiWalkNamespace(ACPI_TYPE_DEVICE, root_handle, 1, find_dimm, 472 NULL, (void *)(uintptr_t)adr, &res); 473 if (ACPI_FAILURE(status)) 474 res = NULL; 475 return (res); 476} 477 478static int 479nvdimm_root_create_devs(device_t dev, ACPI_TABLE_NFIT *nfitbl) 480{ 481 ACPI_HANDLE root_handle, dimm_handle; 482 device_t child; 483 nfit_handle_t *dimm_ids, *dimm; 484 uintptr_t *ivars; 485 int num_dimm_ids; 486 487 root_handle = acpi_get_handle(dev); 488 acpi_nfit_get_dimm_ids(nfitbl, &dimm_ids, &num_dimm_ids); 489 for (dimm = dimm_ids; dimm < dimm_ids + num_dimm_ids; dimm++) { 490 dimm_handle = get_dimm_acpi_handle(root_handle, *dimm); 491 child = BUS_ADD_CHILD(dev, 100, "nvdimm", -1); 492 if (child == NULL) { 493 device_printf(dev, "failed to create nvdimm\n"); 494 return (ENXIO); 495 } 496 ivars = mallocarray(NVDIMM_ROOT_IVAR_MAX, sizeof(uintptr_t), 497 M_NVDIMM, M_ZERO | M_WAITOK); 498 device_set_ivars(child, ivars); 499 nvdimm_root_set_acpi_handle(child, dimm_handle); 500 nvdimm_root_set_device_handle(child, *dimm); 501 } 502 free(dimm_ids, M_NVDIMM); 503 return (0); 504} 505 506static int 507nvdimm_root_create_spas(struct nvdimm_root_dev *dev, ACPI_TABLE_NFIT *nfitbl) 508{ 509 ACPI_NFIT_SYSTEM_ADDRESS **spas, **spa; 510 struct SPA_mapping *spa_mapping; 511 enum SPA_mapping_type spa_type; 512 int error, num_spas; 513 514 error = 0; 515 acpi_nfit_get_spa_ranges(nfitbl, &spas, &num_spas); 516 for (spa = spas; spa < spas + num_spas; spa++) { 517 spa_type = nvdimm_spa_type_from_uuid( 518 (struct uuid *)(*spa)->RangeGuid); 519 if (spa_type == SPA_TYPE_UNKNOWN) 520 continue; 521 spa_mapping = malloc(sizeof(struct SPA_mapping), M_NVDIMM, 522 M_WAITOK | M_ZERO); 523 error = nvdimm_spa_init(spa_mapping, *spa, spa_type); 524 if (error != 0) { 525 nvdimm_spa_fini(spa_mapping); 526 free(spa_mapping, M_NVDIMM); 527 break; 528 } 529 nvdimm_create_namespaces(spa_mapping, nfitbl); 530 SLIST_INSERT_HEAD(&dev->spas, spa_mapping, link); 531 } 532 free(spas, M_NVDIMM); 533 return (error); 534} 535 536static char *nvdimm_root_id[] = {"ACPI0012", NULL}; 537 538static int 539nvdimm_root_probe(device_t dev) 540{ 541 542 if (acpi_disabled("nvdimm")) 543 return (ENXIO); 544 if (ACPI_ID_PROBE(device_get_parent(dev), dev, nvdimm_root_id) 545 != NULL) { 546 device_set_desc(dev, "ACPI NVDIMM root device"); 547 return (BUS_PROBE_DEFAULT); 548 } 549 return (ENXIO); 550} 551 552static int 553nvdimm_root_attach(device_t dev) 554{ 555 struct nvdimm_root_dev *root; 556 ACPI_TABLE_NFIT *nfitbl; 557 ACPI_STATUS status; 558 int error; 559 560 status = AcpiGetTable(ACPI_SIG_NFIT, 1, (ACPI_TABLE_HEADER **)&nfitbl); 561 if (ACPI_FAILURE(status)) { 562 device_printf(dev, "cannot get NFIT\n"); 563 return (ENXIO); 564 } 565 error = nvdimm_root_create_devs(dev, nfitbl); 566 if (error != 0) 567 return (error); 568 error = bus_generic_attach(dev); 569 if (error != 0) 570 return (error); 571 root = device_get_softc(dev); 572 error = nvdimm_root_create_spas(root, nfitbl); 573 AcpiPutTable(&nfitbl->Header); 574 return (error); 575} 576 577static int 578nvdimm_root_detach(device_t dev) 579{ 580 struct nvdimm_root_dev *root; 581 struct SPA_mapping *spa, *next; 582 device_t *children; 583 int i, error, num_children; 584 585 root = device_get_softc(dev); 586 SLIST_FOREACH_SAFE(spa, &root->spas, link, next) { 587 nvdimm_destroy_namespaces(spa); 588 nvdimm_spa_fini(spa); 589 SLIST_REMOVE_HEAD(&root->spas, link); 590 free(spa, M_NVDIMM); 591 } 592 error = bus_generic_detach(dev); 593 if (error != 0) 594 return (error); 595 error = device_get_children(dev, &children, &num_children); 596 if (error != 0) 597 return (error); 598 for (i = 0; i < num_children; i++) 599 free(device_get_ivars(children[i]), M_NVDIMM); 600 free(children, M_TEMP); 601 error = device_delete_children(dev); 602 return (error); 603} 604 605static int 606nvdimm_root_read_ivar(device_t dev, device_t child, int index, 607 uintptr_t *result) 608{ 609 610 if (index < 0 || index >= NVDIMM_ROOT_IVAR_MAX) 611 return (ENOENT); 612 *result = ((uintptr_t *)device_get_ivars(child))[index]; 613 return (0); 614} 615 616static int 617nvdimm_root_write_ivar(device_t dev, device_t child, int index, 618 uintptr_t value) 619{ 620 621 if (index < 0 || index >= NVDIMM_ROOT_IVAR_MAX) 622 return (ENOENT); 623 ((uintptr_t *)device_get_ivars(child))[index] = value; 624 return (0); 625} 626 627static int 628nvdimm_root_child_location_str(device_t dev, device_t child, char *buf, 629 size_t buflen) 630{ 631 ACPI_HANDLE handle; 632 int res; 633 634 handle = nvdimm_root_get_acpi_handle(child); 635 if (handle != NULL) 636 res = snprintf(buf, buflen, "handle=%s", acpi_name(handle)); 637 else 638 res = snprintf(buf, buflen, ""); 639 640 if (res >= buflen) 641 return (EOVERFLOW); 642 return (0); 643} 644 645static device_method_t nvdimm_methods[] = { 646 DEVMETHOD(device_probe, nvdimm_probe), 647 DEVMETHOD(device_attach, nvdimm_attach), 648 DEVMETHOD(device_detach, nvdimm_detach), 649 DEVMETHOD(device_suspend, nvdimm_suspend), 650 DEVMETHOD(device_resume, nvdimm_resume), 651 DEVMETHOD_END 652}; 653 654static driver_t nvdimm_driver = { 655 "nvdimm", 656 nvdimm_methods, 657 sizeof(struct nvdimm_dev), 658}; 659 660static device_method_t nvdimm_root_methods[] = { 661 DEVMETHOD(device_probe, nvdimm_root_probe), 662 DEVMETHOD(device_attach, nvdimm_root_attach), 663 DEVMETHOD(device_detach, nvdimm_root_detach), 664 DEVMETHOD(bus_add_child, bus_generic_add_child), 665 DEVMETHOD(bus_read_ivar, nvdimm_root_read_ivar), 666 DEVMETHOD(bus_write_ivar, nvdimm_root_write_ivar), 667 DEVMETHOD(bus_child_location_str, nvdimm_root_child_location_str), 668 DEVMETHOD_END 669}; 670 671static driver_t nvdimm_root_driver = { 672 "nvdimm_root", 673 nvdimm_root_methods, 674 sizeof(struct nvdimm_root_dev), 675}; 676 677DRIVER_MODULE(nvdimm_root, acpi, nvdimm_root_driver, nvdimm_root_devclass, NULL, 678 NULL); 679DRIVER_MODULE(nvdimm, nvdimm_root, nvdimm_driver, nvdimm_devclass, NULL, NULL); 680MODULE_DEPEND(nvdimm, acpi, 1, 1, 1); 681