1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
5 #include <linux/list_sort.h>
6 #include <linux/libnvdimm.h>
7 #include <linux/module.h>
8 #include <linux/nospec.h>
9 #include <linux/mutex.h>
10 #include <linux/ndctl.h>
11 #include <linux/sysfs.h>
12 #include <linux/delay.h>
13 #include <linux/list.h>
14 #include <linux/acpi.h>
15 #include <linux/sort.h>
18 #include <asm/cacheflush.h>
19 #include <acpi/nfit.h>
24 * For readq() and writeq() on 32-bit builds, the hi-lo, lo-hi order is
27 #include <linux/io-64-nonatomic-hi-lo.h>
29 static bool force_enable_dimms;
30 module_param(force_enable_dimms, bool, S_IRUGO|S_IWUSR);
31 MODULE_PARM_DESC(force_enable_dimms, "Ignore _STA (ACPI DIMM device) status");
33 static bool disable_vendor_specific;
34 module_param(disable_vendor_specific, bool, S_IRUGO);
35 MODULE_PARM_DESC(disable_vendor_specific,
36 "Limit commands to the publicly specified set");
38 static unsigned long override_dsm_mask;
39 module_param(override_dsm_mask, ulong, S_IRUGO);
40 MODULE_PARM_DESC(override_dsm_mask, "Bitmask of allowed NVDIMM DSM functions");
42 static int default_dsm_family = -1;
43 module_param(default_dsm_family, int, S_IRUGO);
44 MODULE_PARM_DESC(default_dsm_family,
45 "Try this DSM type first when identifying NVDIMM family");
47 static bool no_init_ars;
48 module_param(no_init_ars, bool, 0644);
49 MODULE_PARM_DESC(no_init_ars, "Skip ARS run at nfit init time");
51 static bool force_labels;
52 module_param(force_labels, bool, 0444);
53 MODULE_PARM_DESC(force_labels, "Opt-in to labels despite missing methods");
55 LIST_HEAD(acpi_descs);
56 DEFINE_MUTEX(acpi_desc_lock);
58 static struct workqueue_struct *nfit_wq;
60 struct nfit_table_prev {
61 struct list_head spas;
62 struct list_head memdevs;
63 struct list_head dcrs;
64 struct list_head bdws;
65 struct list_head idts;
66 struct list_head flushes;
69 static guid_t nfit_uuid[NFIT_UUID_MAX];
71 const guid_t *to_nfit_uuid(enum nfit_uuids id)
73 return &nfit_uuid[id];
75 EXPORT_SYMBOL(to_nfit_uuid);
77 static const guid_t *to_nfit_bus_uuid(int family)
79 if (WARN_ONCE(family == NVDIMM_BUS_FAMILY_NFIT,
80 "only secondary bus families can be translated\n"))
83 * The index of bus UUIDs starts immediately following the last
86 return to_nfit_uuid(family + NVDIMM_FAMILY_MAX);
89 static struct acpi_device *to_acpi_dev(struct acpi_nfit_desc *acpi_desc)
91 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
94 * If provider == 'ACPI.NFIT' we can assume 'dev' is a struct
97 if (!nd_desc->provider_name
98 || strcmp(nd_desc->provider_name, "ACPI.NFIT") != 0)
101 return to_acpi_device(acpi_desc->dev);
104 static int xlat_bus_status(void *buf, unsigned int cmd, u32 status)
106 struct nd_cmd_clear_error *clear_err;
107 struct nd_cmd_ars_status *ars_status;
112 if ((status & 0xffff) == NFIT_ARS_CAP_NONE)
119 /* No supported scan types for this range */
120 flags = ND_ARS_PERSISTENT | ND_ARS_VOLATILE;
121 if ((status >> 16 & flags) == 0)
124 case ND_CMD_ARS_START:
125 /* ARS is in progress */
126 if ((status & 0xffff) == NFIT_ARS_START_BUSY)
133 case ND_CMD_ARS_STATUS:
138 /* Check extended status (Upper two bytes) */
139 if (status == NFIT_ARS_STATUS_DONE)
142 /* ARS is in progress */
143 if (status == NFIT_ARS_STATUS_BUSY)
146 /* No ARS performed for the current boot */
147 if (status == NFIT_ARS_STATUS_NONE)
151 * ARS interrupted, either we overflowed or some other
152 * agent wants the scan to stop. If we didn't overflow
153 * then just continue with the returned results.
155 if (status == NFIT_ARS_STATUS_INTR) {
156 if (ars_status->out_length >= 40 && (ars_status->flags
157 & NFIT_ARS_F_OVERFLOW))
166 case ND_CMD_CLEAR_ERROR:
170 if (!clear_err->cleared)
172 if (clear_err->length > clear_err->cleared)
173 return clear_err->cleared;
179 /* all other non-zero status results in an error */
185 #define ACPI_LABELS_LOCKED 3
187 static int xlat_nvdimm_status(struct nvdimm *nvdimm, void *buf, unsigned int cmd,
190 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
193 case ND_CMD_GET_CONFIG_SIZE:
195 * In the _LSI, _LSR, _LSW case the locked status is
196 * communicated via the read/write commands
198 if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags))
201 if (status >> 16 & ND_CONFIG_LOCKED)
204 case ND_CMD_GET_CONFIG_DATA:
205 if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)
206 && status == ACPI_LABELS_LOCKED)
209 case ND_CMD_SET_CONFIG_DATA:
210 if (test_bit(NFIT_MEM_LSW, &nfit_mem->flags)
211 && status == ACPI_LABELS_LOCKED)
218 /* all other non-zero status results in an error */
224 static int xlat_status(struct nvdimm *nvdimm, void *buf, unsigned int cmd,
228 return xlat_bus_status(buf, cmd, status);
229 return xlat_nvdimm_status(nvdimm, buf, cmd, status);
232 /* convert _LS{I,R} packages to the buffer object acpi_nfit_ctl expects */
233 static union acpi_object *pkg_to_buf(union acpi_object *pkg)
238 union acpi_object *buf = NULL;
240 if (pkg->type != ACPI_TYPE_PACKAGE) {
241 WARN_ONCE(1, "BIOS bug, unexpected element type: %d\n",
246 for (i = 0; i < pkg->package.count; i++) {
247 union acpi_object *obj = &pkg->package.elements[i];
249 if (obj->type == ACPI_TYPE_INTEGER)
251 else if (obj->type == ACPI_TYPE_BUFFER)
252 size += obj->buffer.length;
254 WARN_ONCE(1, "BIOS bug, unexpected element type: %d\n",
260 buf = ACPI_ALLOCATE(sizeof(*buf) + size);
265 buf->type = ACPI_TYPE_BUFFER;
266 buf->buffer.length = size;
267 buf->buffer.pointer = dst;
268 for (i = 0; i < pkg->package.count; i++) {
269 union acpi_object *obj = &pkg->package.elements[i];
271 if (obj->type == ACPI_TYPE_INTEGER) {
272 memcpy(dst, &obj->integer.value, 4);
274 } else if (obj->type == ACPI_TYPE_BUFFER) {
275 memcpy(dst, obj->buffer.pointer, obj->buffer.length);
276 dst += obj->buffer.length;
284 static union acpi_object *int_to_buf(union acpi_object *integer)
286 union acpi_object *buf = ACPI_ALLOCATE(sizeof(*buf) + 4);
292 if (integer->type != ACPI_TYPE_INTEGER) {
293 WARN_ONCE(1, "BIOS bug, unexpected element type: %d\n",
299 buf->type = ACPI_TYPE_BUFFER;
300 buf->buffer.length = 4;
301 buf->buffer.pointer = dst;
302 memcpy(dst, &integer->integer.value, 4);
308 static union acpi_object *acpi_label_write(acpi_handle handle, u32 offset,
312 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
313 struct acpi_object_list input = {
315 .pointer = (union acpi_object []) {
317 .integer.type = ACPI_TYPE_INTEGER,
318 .integer.value = offset,
321 .integer.type = ACPI_TYPE_INTEGER,
322 .integer.value = len,
325 .buffer.type = ACPI_TYPE_BUFFER,
326 .buffer.pointer = data,
327 .buffer.length = len,
332 rc = acpi_evaluate_object(handle, "_LSW", &input, &buf);
333 if (ACPI_FAILURE(rc))
335 return int_to_buf(buf.pointer);
338 static union acpi_object *acpi_label_read(acpi_handle handle, u32 offset,
342 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
343 struct acpi_object_list input = {
345 .pointer = (union acpi_object []) {
347 .integer.type = ACPI_TYPE_INTEGER,
348 .integer.value = offset,
351 .integer.type = ACPI_TYPE_INTEGER,
352 .integer.value = len,
357 rc = acpi_evaluate_object(handle, "_LSR", &input, &buf);
358 if (ACPI_FAILURE(rc))
360 return pkg_to_buf(buf.pointer);
363 static union acpi_object *acpi_label_info(acpi_handle handle)
366 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
368 rc = acpi_evaluate_object(handle, "_LSI", NULL, &buf);
369 if (ACPI_FAILURE(rc))
371 return pkg_to_buf(buf.pointer);
374 static u8 nfit_dsm_revid(unsigned family, unsigned func)
376 static const u8 revid_table[NVDIMM_FAMILY_MAX+1][NVDIMM_CMD_MAX+1] = {
377 [NVDIMM_FAMILY_INTEL] = {
378 [NVDIMM_INTEL_GET_MODES ...
379 NVDIMM_INTEL_FW_ACTIVATE_ARM] = 2,
384 if (family > NVDIMM_FAMILY_MAX)
386 if (func > NVDIMM_CMD_MAX)
388 id = revid_table[family][func];
390 return 1; /* default */
394 static bool payload_dumpable(struct nvdimm *nvdimm, unsigned int func)
396 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
398 if (nfit_mem && nfit_mem->family == NVDIMM_FAMILY_INTEL
399 && func >= NVDIMM_INTEL_GET_SECURITY_STATE
400 && func <= NVDIMM_INTEL_MASTER_SECURE_ERASE)
401 return IS_ENABLED(CONFIG_NFIT_SECURITY_DEBUG);
405 static int cmd_to_func(struct nfit_mem *nfit_mem, unsigned int cmd,
406 struct nd_cmd_pkg *call_pkg, int *family)
411 if (nfit_mem && nfit_mem->family != call_pkg->nd_family)
414 for (i = 0; i < ARRAY_SIZE(call_pkg->nd_reserved2); i++)
415 if (call_pkg->nd_reserved2[i])
417 *family = call_pkg->nd_family;
418 return call_pkg->nd_command;
421 /* In the !call_pkg case, bus commands == bus functions */
425 /* Linux ND commands == NVDIMM_FAMILY_INTEL function numbers */
426 if (nfit_mem->family == NVDIMM_FAMILY_INTEL)
430 * Force function number validation to fail since 0 is never
431 * published as a valid function in dsm_mask.
436 int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
437 unsigned int cmd, void *buf, unsigned int buf_len, int *cmd_rc)
439 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
440 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
441 union acpi_object in_obj, in_buf, *out_obj;
442 const struct nd_cmd_desc *desc = NULL;
443 struct device *dev = acpi_desc->dev;
444 struct nd_cmd_pkg *call_pkg = NULL;
445 const char *cmd_name, *dimm_name;
446 unsigned long cmd_mask, dsm_mask;
447 u32 offset, fw_status = 0;
456 if (cmd == ND_CMD_CALL)
458 func = cmd_to_func(nfit_mem, cmd, call_pkg, &family);
463 struct acpi_device *adev = nfit_mem->adev;
468 dimm_name = nvdimm_name(nvdimm);
469 cmd_name = nvdimm_cmd_name(cmd);
470 cmd_mask = nvdimm_cmd_mask(nvdimm);
471 dsm_mask = nfit_mem->dsm_mask;
472 desc = nd_cmd_dimm_desc(cmd);
473 guid = to_nfit_uuid(nfit_mem->family);
474 handle = adev->handle;
476 struct acpi_device *adev = to_acpi_dev(acpi_desc);
478 cmd_name = nvdimm_bus_cmd_name(cmd);
479 cmd_mask = nd_desc->cmd_mask;
480 if (cmd == ND_CMD_CALL && call_pkg->nd_family) {
481 family = call_pkg->nd_family;
482 if (family > NVDIMM_BUS_FAMILY_MAX ||
483 !test_bit(family, &nd_desc->bus_family_mask))
485 family = array_index_nospec(family,
486 NVDIMM_BUS_FAMILY_MAX + 1);
487 dsm_mask = acpi_desc->family_dsm_mask[family];
488 guid = to_nfit_bus_uuid(family);
490 dsm_mask = acpi_desc->bus_dsm_mask;
491 guid = to_nfit_uuid(NFIT_DEV_BUS);
493 desc = nd_cmd_bus_desc(cmd);
494 handle = adev->handle;
498 if (!desc || (cmd && (desc->out_num + desc->in_num == 0)))
502 * Check for a valid command. For ND_CMD_CALL, we also have to
503 * make sure that the DSM function is supported.
505 if (cmd == ND_CMD_CALL &&
506 (func > NVDIMM_CMD_MAX || !test_bit(func, &dsm_mask)))
508 else if (!test_bit(cmd, &cmd_mask))
511 in_obj.type = ACPI_TYPE_PACKAGE;
512 in_obj.package.count = 1;
513 in_obj.package.elements = &in_buf;
514 in_buf.type = ACPI_TYPE_BUFFER;
515 in_buf.buffer.pointer = buf;
516 in_buf.buffer.length = 0;
518 /* libnvdimm has already validated the input envelope */
519 for (i = 0; i < desc->in_num; i++)
520 in_buf.buffer.length += nd_cmd_in_size(nvdimm, cmd, desc,
524 /* skip over package wrapper */
525 in_buf.buffer.pointer = (void *) &call_pkg->nd_payload;
526 in_buf.buffer.length = call_pkg->nd_size_in;
529 dev_dbg(dev, "%s cmd: %d: family: %d func: %d input length: %d\n",
530 dimm_name, cmd, family, func, in_buf.buffer.length);
531 if (payload_dumpable(nvdimm, func))
532 print_hex_dump_debug("nvdimm in ", DUMP_PREFIX_OFFSET, 4, 4,
533 in_buf.buffer.pointer,
534 min_t(u32, 256, in_buf.buffer.length), true);
536 /* call the BIOS, prefer the named methods over _DSM if available */
537 if (nvdimm && cmd == ND_CMD_GET_CONFIG_SIZE
538 && test_bit(NFIT_MEM_LSR, &nfit_mem->flags))
539 out_obj = acpi_label_info(handle);
540 else if (nvdimm && cmd == ND_CMD_GET_CONFIG_DATA
541 && test_bit(NFIT_MEM_LSR, &nfit_mem->flags)) {
542 struct nd_cmd_get_config_data_hdr *p = buf;
544 out_obj = acpi_label_read(handle, p->in_offset, p->in_length);
545 } else if (nvdimm && cmd == ND_CMD_SET_CONFIG_DATA
546 && test_bit(NFIT_MEM_LSW, &nfit_mem->flags)) {
547 struct nd_cmd_set_config_hdr *p = buf;
549 out_obj = acpi_label_write(handle, p->in_offset, p->in_length,
555 revid = nfit_dsm_revid(nfit_mem->family, func);
558 out_obj = acpi_evaluate_dsm(handle, guid, revid, func, &in_obj);
562 dev_dbg(dev, "%s _DSM failed cmd: %s\n", dimm_name, cmd_name);
566 if (out_obj->type != ACPI_TYPE_BUFFER) {
567 dev_dbg(dev, "%s unexpected output object type cmd: %s type: %d\n",
568 dimm_name, cmd_name, out_obj->type);
573 dev_dbg(dev, "%s cmd: %s output length: %d\n", dimm_name,
574 cmd_name, out_obj->buffer.length);
575 print_hex_dump_debug(cmd_name, DUMP_PREFIX_OFFSET, 4, 4,
576 out_obj->buffer.pointer,
577 min_t(u32, 128, out_obj->buffer.length), true);
580 call_pkg->nd_fw_size = out_obj->buffer.length;
581 memcpy(call_pkg->nd_payload + call_pkg->nd_size_in,
582 out_obj->buffer.pointer,
583 min(call_pkg->nd_fw_size, call_pkg->nd_size_out));
587 * Need to support FW function w/o known size in advance.
588 * Caller can determine required size based upon nd_fw_size.
589 * If we return an error (like elsewhere) then caller wouldn't
590 * be able to rely upon data returned to make calculation.
597 for (i = 0, offset = 0; i < desc->out_num; i++) {
598 u32 out_size = nd_cmd_out_size(nvdimm, cmd, desc, i, buf,
599 (u32 *) out_obj->buffer.pointer,
600 out_obj->buffer.length - offset);
602 if (offset + out_size > out_obj->buffer.length) {
603 dev_dbg(dev, "%s output object underflow cmd: %s field: %d\n",
604 dimm_name, cmd_name, i);
608 if (in_buf.buffer.length + offset + out_size > buf_len) {
609 dev_dbg(dev, "%s output overrun cmd: %s field: %d\n",
610 dimm_name, cmd_name, i);
614 memcpy(buf + in_buf.buffer.length + offset,
615 out_obj->buffer.pointer + offset, out_size);
620 * Set fw_status for all the commands with a known format to be
621 * later interpreted by xlat_status().
623 if (i >= 1 && ((!nvdimm && cmd >= ND_CMD_ARS_CAP
624 && cmd <= ND_CMD_CLEAR_ERROR)
625 || (nvdimm && cmd >= ND_CMD_SMART
626 && cmd <= ND_CMD_VENDOR)))
627 fw_status = *(u32 *) out_obj->buffer.pointer;
629 if (offset + in_buf.buffer.length < buf_len) {
632 * status valid, return the number of bytes left
633 * unfilled in the output buffer
635 rc = buf_len - offset - in_buf.buffer.length;
637 *cmd_rc = xlat_status(nvdimm, buf, cmd,
640 dev_err(dev, "%s:%s underrun cmd: %s buf_len: %d out_len: %d\n",
641 __func__, dimm_name, cmd_name, buf_len,
648 *cmd_rc = xlat_status(nvdimm, buf, cmd, fw_status);
656 EXPORT_SYMBOL_GPL(acpi_nfit_ctl);
658 static const char *spa_type_name(u16 type)
660 static const char *to_name[] = {
661 [NFIT_SPA_VOLATILE] = "volatile",
662 [NFIT_SPA_PM] = "pmem",
663 [NFIT_SPA_DCR] = "dimm-control-region",
664 [NFIT_SPA_BDW] = "block-data-window",
665 [NFIT_SPA_VDISK] = "volatile-disk",
666 [NFIT_SPA_VCD] = "volatile-cd",
667 [NFIT_SPA_PDISK] = "persistent-disk",
668 [NFIT_SPA_PCD] = "persistent-cd",
672 if (type > NFIT_SPA_PCD)
675 return to_name[type];
678 int nfit_spa_type(struct acpi_nfit_system_address *spa)
682 for (i = 0; i < NFIT_UUID_MAX; i++)
683 if (guid_equal(to_nfit_uuid(i), (guid_t *)&spa->range_guid))
688 static bool add_spa(struct acpi_nfit_desc *acpi_desc,
689 struct nfit_table_prev *prev,
690 struct acpi_nfit_system_address *spa)
692 struct device *dev = acpi_desc->dev;
693 struct nfit_spa *nfit_spa;
695 if (spa->header.length != sizeof(*spa))
698 list_for_each_entry(nfit_spa, &prev->spas, list) {
699 if (memcmp(nfit_spa->spa, spa, sizeof(*spa)) == 0) {
700 list_move_tail(&nfit_spa->list, &acpi_desc->spas);
705 nfit_spa = devm_kzalloc(dev, sizeof(*nfit_spa) + sizeof(*spa),
709 INIT_LIST_HEAD(&nfit_spa->list);
710 memcpy(nfit_spa->spa, spa, sizeof(*spa));
711 list_add_tail(&nfit_spa->list, &acpi_desc->spas);
712 dev_dbg(dev, "spa index: %d type: %s\n",
714 spa_type_name(nfit_spa_type(spa)));
718 static bool add_memdev(struct acpi_nfit_desc *acpi_desc,
719 struct nfit_table_prev *prev,
720 struct acpi_nfit_memory_map *memdev)
722 struct device *dev = acpi_desc->dev;
723 struct nfit_memdev *nfit_memdev;
725 if (memdev->header.length != sizeof(*memdev))
728 list_for_each_entry(nfit_memdev, &prev->memdevs, list)
729 if (memcmp(nfit_memdev->memdev, memdev, sizeof(*memdev)) == 0) {
730 list_move_tail(&nfit_memdev->list, &acpi_desc->memdevs);
734 nfit_memdev = devm_kzalloc(dev, sizeof(*nfit_memdev) + sizeof(*memdev),
738 INIT_LIST_HEAD(&nfit_memdev->list);
739 memcpy(nfit_memdev->memdev, memdev, sizeof(*memdev));
740 list_add_tail(&nfit_memdev->list, &acpi_desc->memdevs);
741 dev_dbg(dev, "memdev handle: %#x spa: %d dcr: %d flags: %#x\n",
742 memdev->device_handle, memdev->range_index,
743 memdev->region_index, memdev->flags);
747 int nfit_get_smbios_id(u32 device_handle, u16 *flags)
749 struct acpi_nfit_memory_map *memdev;
750 struct acpi_nfit_desc *acpi_desc;
751 struct nfit_mem *nfit_mem;
754 mutex_lock(&acpi_desc_lock);
755 list_for_each_entry(acpi_desc, &acpi_descs, list) {
756 mutex_lock(&acpi_desc->init_mutex);
757 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
758 memdev = __to_nfit_memdev(nfit_mem);
759 if (memdev->device_handle == device_handle) {
760 *flags = memdev->flags;
761 physical_id = memdev->physical_id;
762 mutex_unlock(&acpi_desc->init_mutex);
763 mutex_unlock(&acpi_desc_lock);
767 mutex_unlock(&acpi_desc->init_mutex);
769 mutex_unlock(&acpi_desc_lock);
773 EXPORT_SYMBOL_GPL(nfit_get_smbios_id);
776 * An implementation may provide a truncated control region if no block windows
779 static size_t sizeof_dcr(struct acpi_nfit_control_region *dcr)
781 if (dcr->header.length < offsetof(struct acpi_nfit_control_region,
786 return offsetof(struct acpi_nfit_control_region, window_size);
789 static bool add_dcr(struct acpi_nfit_desc *acpi_desc,
790 struct nfit_table_prev *prev,
791 struct acpi_nfit_control_region *dcr)
793 struct device *dev = acpi_desc->dev;
794 struct nfit_dcr *nfit_dcr;
796 if (!sizeof_dcr(dcr))
799 list_for_each_entry(nfit_dcr, &prev->dcrs, list)
800 if (memcmp(nfit_dcr->dcr, dcr, sizeof_dcr(dcr)) == 0) {
801 list_move_tail(&nfit_dcr->list, &acpi_desc->dcrs);
805 nfit_dcr = devm_kzalloc(dev, sizeof(*nfit_dcr) + sizeof(*dcr),
809 INIT_LIST_HEAD(&nfit_dcr->list);
810 memcpy(nfit_dcr->dcr, dcr, sizeof_dcr(dcr));
811 list_add_tail(&nfit_dcr->list, &acpi_desc->dcrs);
812 dev_dbg(dev, "dcr index: %d windows: %d\n",
813 dcr->region_index, dcr->windows);
817 static bool add_bdw(struct acpi_nfit_desc *acpi_desc,
818 struct nfit_table_prev *prev,
819 struct acpi_nfit_data_region *bdw)
821 struct device *dev = acpi_desc->dev;
822 struct nfit_bdw *nfit_bdw;
824 if (bdw->header.length != sizeof(*bdw))
826 list_for_each_entry(nfit_bdw, &prev->bdws, list)
827 if (memcmp(nfit_bdw->bdw, bdw, sizeof(*bdw)) == 0) {
828 list_move_tail(&nfit_bdw->list, &acpi_desc->bdws);
832 nfit_bdw = devm_kzalloc(dev, sizeof(*nfit_bdw) + sizeof(*bdw),
836 INIT_LIST_HEAD(&nfit_bdw->list);
837 memcpy(nfit_bdw->bdw, bdw, sizeof(*bdw));
838 list_add_tail(&nfit_bdw->list, &acpi_desc->bdws);
839 dev_dbg(dev, "bdw dcr: %d windows: %d\n",
840 bdw->region_index, bdw->windows);
844 static size_t sizeof_idt(struct acpi_nfit_interleave *idt)
846 if (idt->header.length < sizeof(*idt))
848 return sizeof(*idt) + sizeof(u32) * (idt->line_count - 1);
851 static bool add_idt(struct acpi_nfit_desc *acpi_desc,
852 struct nfit_table_prev *prev,
853 struct acpi_nfit_interleave *idt)
855 struct device *dev = acpi_desc->dev;
856 struct nfit_idt *nfit_idt;
858 if (!sizeof_idt(idt))
861 list_for_each_entry(nfit_idt, &prev->idts, list) {
862 if (sizeof_idt(nfit_idt->idt) != sizeof_idt(idt))
865 if (memcmp(nfit_idt->idt, idt, sizeof_idt(idt)) == 0) {
866 list_move_tail(&nfit_idt->list, &acpi_desc->idts);
871 nfit_idt = devm_kzalloc(dev, sizeof(*nfit_idt) + sizeof_idt(idt),
875 INIT_LIST_HEAD(&nfit_idt->list);
876 memcpy(nfit_idt->idt, idt, sizeof_idt(idt));
877 list_add_tail(&nfit_idt->list, &acpi_desc->idts);
878 dev_dbg(dev, "idt index: %d num_lines: %d\n",
879 idt->interleave_index, idt->line_count);
883 static size_t sizeof_flush(struct acpi_nfit_flush_address *flush)
885 if (flush->header.length < sizeof(*flush))
887 return sizeof(*flush) + sizeof(u64) * (flush->hint_count - 1);
890 static bool add_flush(struct acpi_nfit_desc *acpi_desc,
891 struct nfit_table_prev *prev,
892 struct acpi_nfit_flush_address *flush)
894 struct device *dev = acpi_desc->dev;
895 struct nfit_flush *nfit_flush;
897 if (!sizeof_flush(flush))
900 list_for_each_entry(nfit_flush, &prev->flushes, list) {
901 if (sizeof_flush(nfit_flush->flush) != sizeof_flush(flush))
904 if (memcmp(nfit_flush->flush, flush,
905 sizeof_flush(flush)) == 0) {
906 list_move_tail(&nfit_flush->list, &acpi_desc->flushes);
911 nfit_flush = devm_kzalloc(dev, sizeof(*nfit_flush)
912 + sizeof_flush(flush), GFP_KERNEL);
915 INIT_LIST_HEAD(&nfit_flush->list);
916 memcpy(nfit_flush->flush, flush, sizeof_flush(flush));
917 list_add_tail(&nfit_flush->list, &acpi_desc->flushes);
918 dev_dbg(dev, "nfit_flush handle: %d hint_count: %d\n",
919 flush->device_handle, flush->hint_count);
923 static bool add_platform_cap(struct acpi_nfit_desc *acpi_desc,
924 struct acpi_nfit_capabilities *pcap)
926 struct device *dev = acpi_desc->dev;
929 mask = (1 << (pcap->highest_capability + 1)) - 1;
930 acpi_desc->platform_cap = pcap->capabilities & mask;
931 dev_dbg(dev, "cap: %#x\n", acpi_desc->platform_cap);
935 static void *add_table(struct acpi_nfit_desc *acpi_desc,
936 struct nfit_table_prev *prev, void *table, const void *end)
938 struct device *dev = acpi_desc->dev;
939 struct acpi_nfit_header *hdr;
940 void *err = ERR_PTR(-ENOMEM);
947 dev_warn(dev, "found a zero length table '%d' parsing nfit\n",
953 case ACPI_NFIT_TYPE_SYSTEM_ADDRESS:
954 if (!add_spa(acpi_desc, prev, table))
957 case ACPI_NFIT_TYPE_MEMORY_MAP:
958 if (!add_memdev(acpi_desc, prev, table))
961 case ACPI_NFIT_TYPE_CONTROL_REGION:
962 if (!add_dcr(acpi_desc, prev, table))
965 case ACPI_NFIT_TYPE_DATA_REGION:
966 if (!add_bdw(acpi_desc, prev, table))
969 case ACPI_NFIT_TYPE_INTERLEAVE:
970 if (!add_idt(acpi_desc, prev, table))
973 case ACPI_NFIT_TYPE_FLUSH_ADDRESS:
974 if (!add_flush(acpi_desc, prev, table))
977 case ACPI_NFIT_TYPE_SMBIOS:
978 dev_dbg(dev, "smbios\n");
980 case ACPI_NFIT_TYPE_CAPABILITIES:
981 if (!add_platform_cap(acpi_desc, table))
985 dev_err(dev, "unknown table '%d' parsing nfit\n", hdr->type);
989 return table + hdr->length;
992 static void nfit_mem_find_spa_bdw(struct acpi_nfit_desc *acpi_desc,
993 struct nfit_mem *nfit_mem)
995 u32 device_handle = __to_nfit_memdev(nfit_mem)->device_handle;
996 u16 dcr = nfit_mem->dcr->region_index;
997 struct nfit_spa *nfit_spa;
999 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
1000 u16 range_index = nfit_spa->spa->range_index;
1001 int type = nfit_spa_type(nfit_spa->spa);
1002 struct nfit_memdev *nfit_memdev;
1004 if (type != NFIT_SPA_BDW)
1007 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
1008 if (nfit_memdev->memdev->range_index != range_index)
1010 if (nfit_memdev->memdev->device_handle != device_handle)
1012 if (nfit_memdev->memdev->region_index != dcr)
1015 nfit_mem->spa_bdw = nfit_spa->spa;
1020 dev_dbg(acpi_desc->dev, "SPA-BDW not found for SPA-DCR %d\n",
1021 nfit_mem->spa_dcr->range_index);
1022 nfit_mem->bdw = NULL;
1025 static void nfit_mem_init_bdw(struct acpi_nfit_desc *acpi_desc,
1026 struct nfit_mem *nfit_mem, struct acpi_nfit_system_address *spa)
1028 u16 dcr = __to_nfit_memdev(nfit_mem)->region_index;
1029 struct nfit_memdev *nfit_memdev;
1030 struct nfit_bdw *nfit_bdw;
1031 struct nfit_idt *nfit_idt;
1032 u16 idt_idx, range_index;
1034 list_for_each_entry(nfit_bdw, &acpi_desc->bdws, list) {
1035 if (nfit_bdw->bdw->region_index != dcr)
1037 nfit_mem->bdw = nfit_bdw->bdw;
1044 nfit_mem_find_spa_bdw(acpi_desc, nfit_mem);
1046 if (!nfit_mem->spa_bdw)
1049 range_index = nfit_mem->spa_bdw->range_index;
1050 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
1051 if (nfit_memdev->memdev->range_index != range_index ||
1052 nfit_memdev->memdev->region_index != dcr)
1054 nfit_mem->memdev_bdw = nfit_memdev->memdev;
1055 idt_idx = nfit_memdev->memdev->interleave_index;
1056 list_for_each_entry(nfit_idt, &acpi_desc->idts, list) {
1057 if (nfit_idt->idt->interleave_index != idt_idx)
1059 nfit_mem->idt_bdw = nfit_idt->idt;
1066 static int __nfit_mem_init(struct acpi_nfit_desc *acpi_desc,
1067 struct acpi_nfit_system_address *spa)
1069 struct nfit_mem *nfit_mem, *found;
1070 struct nfit_memdev *nfit_memdev;
1071 int type = spa ? nfit_spa_type(spa) : 0;
1083 * This loop runs in two modes, when a dimm is mapped the loop
1084 * adds memdev associations to an existing dimm, or creates a
1085 * dimm. In the unmapped dimm case this loop sweeps for memdev
1086 * instances with an invalid / zero range_index and adds those
1087 * dimms without spa associations.
1089 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
1090 struct nfit_flush *nfit_flush;
1091 struct nfit_dcr *nfit_dcr;
1095 if (spa && nfit_memdev->memdev->range_index != spa->range_index)
1097 if (!spa && nfit_memdev->memdev->range_index)
1100 dcr = nfit_memdev->memdev->region_index;
1101 device_handle = nfit_memdev->memdev->device_handle;
1102 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list)
1103 if (__to_nfit_memdev(nfit_mem)->device_handle
1112 nfit_mem = devm_kzalloc(acpi_desc->dev,
1113 sizeof(*nfit_mem), GFP_KERNEL);
1116 INIT_LIST_HEAD(&nfit_mem->list);
1117 nfit_mem->acpi_desc = acpi_desc;
1118 list_add(&nfit_mem->list, &acpi_desc->dimms);
1121 list_for_each_entry(nfit_dcr, &acpi_desc->dcrs, list) {
1122 if (nfit_dcr->dcr->region_index != dcr)
1125 * Record the control region for the dimm. For
1126 * the ACPI 6.1 case, where there are separate
1127 * control regions for the pmem vs blk
1128 * interfaces, be sure to record the extended
1132 nfit_mem->dcr = nfit_dcr->dcr;
1133 else if (nfit_mem->dcr->windows == 0
1134 && nfit_dcr->dcr->windows)
1135 nfit_mem->dcr = nfit_dcr->dcr;
1139 list_for_each_entry(nfit_flush, &acpi_desc->flushes, list) {
1140 struct acpi_nfit_flush_address *flush;
1143 if (nfit_flush->flush->device_handle != device_handle)
1145 nfit_mem->nfit_flush = nfit_flush;
1146 flush = nfit_flush->flush;
1147 nfit_mem->flush_wpq = devm_kcalloc(acpi_desc->dev,
1149 sizeof(struct resource),
1151 if (!nfit_mem->flush_wpq)
1153 for (i = 0; i < flush->hint_count; i++) {
1154 struct resource *res = &nfit_mem->flush_wpq[i];
1156 res->start = flush->hint_address[i];
1157 res->end = res->start + 8 - 1;
1162 if (dcr && !nfit_mem->dcr) {
1163 dev_err(acpi_desc->dev, "SPA %d missing DCR %d\n",
1164 spa->range_index, dcr);
1168 if (type == NFIT_SPA_DCR) {
1169 struct nfit_idt *nfit_idt;
1172 /* multiple dimms may share a SPA when interleaved */
1173 nfit_mem->spa_dcr = spa;
1174 nfit_mem->memdev_dcr = nfit_memdev->memdev;
1175 idt_idx = nfit_memdev->memdev->interleave_index;
1176 list_for_each_entry(nfit_idt, &acpi_desc->idts, list) {
1177 if (nfit_idt->idt->interleave_index != idt_idx)
1179 nfit_mem->idt_dcr = nfit_idt->idt;
1182 nfit_mem_init_bdw(acpi_desc, nfit_mem, spa);
1183 } else if (type == NFIT_SPA_PM) {
1185 * A single dimm may belong to multiple SPA-PM
1186 * ranges, record at least one in addition to
1187 * any SPA-DCR range.
1189 nfit_mem->memdev_pmem = nfit_memdev->memdev;
1191 nfit_mem->memdev_dcr = nfit_memdev->memdev;
1197 static int nfit_mem_cmp(void *priv, const struct list_head *_a,
1198 const struct list_head *_b)
1200 struct nfit_mem *a = container_of(_a, typeof(*a), list);
1201 struct nfit_mem *b = container_of(_b, typeof(*b), list);
1202 u32 handleA, handleB;
1204 handleA = __to_nfit_memdev(a)->device_handle;
1205 handleB = __to_nfit_memdev(b)->device_handle;
1206 if (handleA < handleB)
1208 else if (handleA > handleB)
1213 static int nfit_mem_init(struct acpi_nfit_desc *acpi_desc)
1215 struct nfit_spa *nfit_spa;
1220 * For each SPA-DCR or SPA-PMEM address range find its
1221 * corresponding MEMDEV(s). From each MEMDEV find the
1222 * corresponding DCR. Then, if we're operating on a SPA-DCR,
1223 * try to find a SPA-BDW and a corresponding BDW that references
1224 * the DCR. Throw it all into an nfit_mem object. Note, that
1225 * BDWs are optional.
1227 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
1228 rc = __nfit_mem_init(acpi_desc, nfit_spa->spa);
1234 * If a DIMM has failed to be mapped into SPA there will be no
1235 * SPA entries above. Find and register all the unmapped DIMMs
1236 * for reporting and recovery purposes.
1238 rc = __nfit_mem_init(acpi_desc, NULL);
1242 list_sort(NULL, &acpi_desc->dimms, nfit_mem_cmp);
1247 static ssize_t bus_dsm_mask_show(struct device *dev,
1248 struct device_attribute *attr, char *buf)
1250 struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
1251 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
1252 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1254 return sprintf(buf, "%#lx\n", acpi_desc->bus_dsm_mask);
1256 static struct device_attribute dev_attr_bus_dsm_mask =
1257 __ATTR(dsm_mask, 0444, bus_dsm_mask_show, NULL);
1259 static ssize_t revision_show(struct device *dev,
1260 struct device_attribute *attr, char *buf)
1262 struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
1263 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
1264 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1266 return sprintf(buf, "%d\n", acpi_desc->acpi_header.revision);
1268 static DEVICE_ATTR_RO(revision);
1270 static ssize_t hw_error_scrub_show(struct device *dev,
1271 struct device_attribute *attr, char *buf)
1273 struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
1274 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
1275 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1277 return sprintf(buf, "%d\n", acpi_desc->scrub_mode);
1281 * The 'hw_error_scrub' attribute can have the following values written to it:
1282 * '0': Switch to the default mode where an exception will only insert
1283 * the address of the memory error into the poison and badblocks lists.
1284 * '1': Enable a full scrub to happen if an exception for a memory error is
1287 static ssize_t hw_error_scrub_store(struct device *dev,
1288 struct device_attribute *attr, const char *buf, size_t size)
1290 struct nvdimm_bus_descriptor *nd_desc;
1294 rc = kstrtol(buf, 0, &val);
1298 nfit_device_lock(dev);
1299 nd_desc = dev_get_drvdata(dev);
1301 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1304 case HW_ERROR_SCRUB_ON:
1305 acpi_desc->scrub_mode = HW_ERROR_SCRUB_ON;
1307 case HW_ERROR_SCRUB_OFF:
1308 acpi_desc->scrub_mode = HW_ERROR_SCRUB_OFF;
1315 nfit_device_unlock(dev);
1320 static DEVICE_ATTR_RW(hw_error_scrub);
1323 * This shows the number of full Address Range Scrubs that have been
1324 * completed since driver load time. Userspace can wait on this using
1325 * select/poll etc. A '+' at the end indicates an ARS is in progress
1327 static ssize_t scrub_show(struct device *dev,
1328 struct device_attribute *attr, char *buf)
1330 struct nvdimm_bus_descriptor *nd_desc;
1331 struct acpi_nfit_desc *acpi_desc;
1332 ssize_t rc = -ENXIO;
1335 nfit_device_lock(dev);
1336 nd_desc = dev_get_drvdata(dev);
1338 nfit_device_unlock(dev);
1341 acpi_desc = to_acpi_desc(nd_desc);
1343 mutex_lock(&acpi_desc->init_mutex);
1344 busy = test_bit(ARS_BUSY, &acpi_desc->scrub_flags)
1345 && !test_bit(ARS_CANCEL, &acpi_desc->scrub_flags);
1346 rc = sprintf(buf, "%d%s", acpi_desc->scrub_count, busy ? "+\n" : "\n");
1347 /* Allow an admin to poll the busy state at a higher rate */
1348 if (busy && capable(CAP_SYS_RAWIO) && !test_and_set_bit(ARS_POLL,
1349 &acpi_desc->scrub_flags)) {
1350 acpi_desc->scrub_tmo = 1;
1351 mod_delayed_work(nfit_wq, &acpi_desc->dwork, HZ);
1354 mutex_unlock(&acpi_desc->init_mutex);
1355 nfit_device_unlock(dev);
1359 static ssize_t scrub_store(struct device *dev,
1360 struct device_attribute *attr, const char *buf, size_t size)
1362 struct nvdimm_bus_descriptor *nd_desc;
1366 rc = kstrtol(buf, 0, &val);
1372 nfit_device_lock(dev);
1373 nd_desc = dev_get_drvdata(dev);
1375 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1377 rc = acpi_nfit_ars_rescan(acpi_desc, ARS_REQ_LONG);
1379 nfit_device_unlock(dev);
1384 static DEVICE_ATTR_RW(scrub);
1386 static bool ars_supported(struct nvdimm_bus *nvdimm_bus)
1388 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
1389 const unsigned long mask = 1 << ND_CMD_ARS_CAP | 1 << ND_CMD_ARS_START
1390 | 1 << ND_CMD_ARS_STATUS;
1392 return (nd_desc->cmd_mask & mask) == mask;
1395 static umode_t nfit_visible(struct kobject *kobj, struct attribute *a, int n)
1397 struct device *dev = kobj_to_dev(kobj);
1398 struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
1400 if (a == &dev_attr_scrub.attr)
1401 return ars_supported(nvdimm_bus) ? a->mode : 0;
1403 if (a == &dev_attr_firmware_activate_noidle.attr)
1404 return intel_fwa_supported(nvdimm_bus) ? a->mode : 0;
1409 static struct attribute *acpi_nfit_attributes[] = {
1410 &dev_attr_revision.attr,
1411 &dev_attr_scrub.attr,
1412 &dev_attr_hw_error_scrub.attr,
1413 &dev_attr_bus_dsm_mask.attr,
1414 &dev_attr_firmware_activate_noidle.attr,
1418 static const struct attribute_group acpi_nfit_attribute_group = {
1420 .attrs = acpi_nfit_attributes,
1421 .is_visible = nfit_visible,
1424 static const struct attribute_group *acpi_nfit_attribute_groups[] = {
1425 &acpi_nfit_attribute_group,
1429 static struct acpi_nfit_memory_map *to_nfit_memdev(struct device *dev)
1431 struct nvdimm *nvdimm = to_nvdimm(dev);
1432 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1434 return __to_nfit_memdev(nfit_mem);
1437 static struct acpi_nfit_control_region *to_nfit_dcr(struct device *dev)
1439 struct nvdimm *nvdimm = to_nvdimm(dev);
1440 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1442 return nfit_mem->dcr;
1445 static ssize_t handle_show(struct device *dev,
1446 struct device_attribute *attr, char *buf)
1448 struct acpi_nfit_memory_map *memdev = to_nfit_memdev(dev);
1450 return sprintf(buf, "%#x\n", memdev->device_handle);
1452 static DEVICE_ATTR_RO(handle);
1454 static ssize_t phys_id_show(struct device *dev,
1455 struct device_attribute *attr, char *buf)
1457 struct acpi_nfit_memory_map *memdev = to_nfit_memdev(dev);
1459 return sprintf(buf, "%#x\n", memdev->physical_id);
1461 static DEVICE_ATTR_RO(phys_id);
1463 static ssize_t vendor_show(struct device *dev,
1464 struct device_attribute *attr, char *buf)
1466 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1468 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->vendor_id));
1470 static DEVICE_ATTR_RO(vendor);
1472 static ssize_t rev_id_show(struct device *dev,
1473 struct device_attribute *attr, char *buf)
1475 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1477 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->revision_id));
1479 static DEVICE_ATTR_RO(rev_id);
1481 static ssize_t device_show(struct device *dev,
1482 struct device_attribute *attr, char *buf)
1484 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1486 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->device_id));
1488 static DEVICE_ATTR_RO(device);
1490 static ssize_t subsystem_vendor_show(struct device *dev,
1491 struct device_attribute *attr, char *buf)
1493 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1495 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->subsystem_vendor_id));
1497 static DEVICE_ATTR_RO(subsystem_vendor);
1499 static ssize_t subsystem_rev_id_show(struct device *dev,
1500 struct device_attribute *attr, char *buf)
1502 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1504 return sprintf(buf, "0x%04x\n",
1505 be16_to_cpu(dcr->subsystem_revision_id));
1507 static DEVICE_ATTR_RO(subsystem_rev_id);
1509 static ssize_t subsystem_device_show(struct device *dev,
1510 struct device_attribute *attr, char *buf)
1512 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1514 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->subsystem_device_id));
1516 static DEVICE_ATTR_RO(subsystem_device);
1518 static int num_nvdimm_formats(struct nvdimm *nvdimm)
1520 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1523 if (nfit_mem->memdev_pmem)
1525 if (nfit_mem->memdev_bdw)
1530 static ssize_t format_show(struct device *dev,
1531 struct device_attribute *attr, char *buf)
1533 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1535 return sprintf(buf, "0x%04x\n", le16_to_cpu(dcr->code));
1537 static DEVICE_ATTR_RO(format);
1539 static ssize_t format1_show(struct device *dev,
1540 struct device_attribute *attr, char *buf)
1543 ssize_t rc = -ENXIO;
1544 struct nfit_mem *nfit_mem;
1545 struct nfit_memdev *nfit_memdev;
1546 struct acpi_nfit_desc *acpi_desc;
1547 struct nvdimm *nvdimm = to_nvdimm(dev);
1548 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1550 nfit_mem = nvdimm_provider_data(nvdimm);
1551 acpi_desc = nfit_mem->acpi_desc;
1552 handle = to_nfit_memdev(dev)->device_handle;
1554 /* assumes DIMMs have at most 2 published interface codes */
1555 mutex_lock(&acpi_desc->init_mutex);
1556 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
1557 struct acpi_nfit_memory_map *memdev = nfit_memdev->memdev;
1558 struct nfit_dcr *nfit_dcr;
1560 if (memdev->device_handle != handle)
1563 list_for_each_entry(nfit_dcr, &acpi_desc->dcrs, list) {
1564 if (nfit_dcr->dcr->region_index != memdev->region_index)
1566 if (nfit_dcr->dcr->code == dcr->code)
1568 rc = sprintf(buf, "0x%04x\n",
1569 le16_to_cpu(nfit_dcr->dcr->code));
1575 mutex_unlock(&acpi_desc->init_mutex);
1578 static DEVICE_ATTR_RO(format1);
1580 static ssize_t formats_show(struct device *dev,
1581 struct device_attribute *attr, char *buf)
1583 struct nvdimm *nvdimm = to_nvdimm(dev);
1585 return sprintf(buf, "%d\n", num_nvdimm_formats(nvdimm));
1587 static DEVICE_ATTR_RO(formats);
1589 static ssize_t serial_show(struct device *dev,
1590 struct device_attribute *attr, char *buf)
1592 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1594 return sprintf(buf, "0x%08x\n", be32_to_cpu(dcr->serial_number));
1596 static DEVICE_ATTR_RO(serial);
1598 static ssize_t family_show(struct device *dev,
1599 struct device_attribute *attr, char *buf)
1601 struct nvdimm *nvdimm = to_nvdimm(dev);
1602 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1604 if (nfit_mem->family < 0)
1606 return sprintf(buf, "%d\n", nfit_mem->family);
1608 static DEVICE_ATTR_RO(family);
1610 static ssize_t dsm_mask_show(struct device *dev,
1611 struct device_attribute *attr, char *buf)
1613 struct nvdimm *nvdimm = to_nvdimm(dev);
1614 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1616 if (nfit_mem->family < 0)
1618 return sprintf(buf, "%#lx\n", nfit_mem->dsm_mask);
1620 static DEVICE_ATTR_RO(dsm_mask);
1622 static ssize_t flags_show(struct device *dev,
1623 struct device_attribute *attr, char *buf)
1625 struct nvdimm *nvdimm = to_nvdimm(dev);
1626 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1627 u16 flags = __to_nfit_memdev(nfit_mem)->flags;
1629 if (test_bit(NFIT_MEM_DIRTY, &nfit_mem->flags))
1630 flags |= ACPI_NFIT_MEM_FLUSH_FAILED;
1632 return sprintf(buf, "%s%s%s%s%s%s%s\n",
1633 flags & ACPI_NFIT_MEM_SAVE_FAILED ? "save_fail " : "",
1634 flags & ACPI_NFIT_MEM_RESTORE_FAILED ? "restore_fail " : "",
1635 flags & ACPI_NFIT_MEM_FLUSH_FAILED ? "flush_fail " : "",
1636 flags & ACPI_NFIT_MEM_NOT_ARMED ? "not_armed " : "",
1637 flags & ACPI_NFIT_MEM_HEALTH_OBSERVED ? "smart_event " : "",
1638 flags & ACPI_NFIT_MEM_MAP_FAILED ? "map_fail " : "",
1639 flags & ACPI_NFIT_MEM_HEALTH_ENABLED ? "smart_notify " : "");
1641 static DEVICE_ATTR_RO(flags);
1643 static ssize_t id_show(struct device *dev,
1644 struct device_attribute *attr, char *buf)
1646 struct nvdimm *nvdimm = to_nvdimm(dev);
1647 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1649 return sprintf(buf, "%s\n", nfit_mem->id);
1651 static DEVICE_ATTR_RO(id);
1653 static ssize_t dirty_shutdown_show(struct device *dev,
1654 struct device_attribute *attr, char *buf)
1656 struct nvdimm *nvdimm = to_nvdimm(dev);
1657 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1659 return sprintf(buf, "%d\n", nfit_mem->dirty_shutdown);
1661 static DEVICE_ATTR_RO(dirty_shutdown);
1663 static struct attribute *acpi_nfit_dimm_attributes[] = {
1664 &dev_attr_handle.attr,
1665 &dev_attr_phys_id.attr,
1666 &dev_attr_vendor.attr,
1667 &dev_attr_device.attr,
1668 &dev_attr_rev_id.attr,
1669 &dev_attr_subsystem_vendor.attr,
1670 &dev_attr_subsystem_device.attr,
1671 &dev_attr_subsystem_rev_id.attr,
1672 &dev_attr_format.attr,
1673 &dev_attr_formats.attr,
1674 &dev_attr_format1.attr,
1675 &dev_attr_serial.attr,
1676 &dev_attr_flags.attr,
1678 &dev_attr_family.attr,
1679 &dev_attr_dsm_mask.attr,
1680 &dev_attr_dirty_shutdown.attr,
1684 static umode_t acpi_nfit_dimm_attr_visible(struct kobject *kobj,
1685 struct attribute *a, int n)
1687 struct device *dev = kobj_to_dev(kobj);
1688 struct nvdimm *nvdimm = to_nvdimm(dev);
1689 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1691 if (!to_nfit_dcr(dev)) {
1692 /* Without a dcr only the memdev attributes can be surfaced */
1693 if (a == &dev_attr_handle.attr || a == &dev_attr_phys_id.attr
1694 || a == &dev_attr_flags.attr
1695 || a == &dev_attr_family.attr
1696 || a == &dev_attr_dsm_mask.attr)
1701 if (a == &dev_attr_format1.attr && num_nvdimm_formats(nvdimm) <= 1)
1704 if (!test_bit(NFIT_MEM_DIRTY_COUNT, &nfit_mem->flags)
1705 && a == &dev_attr_dirty_shutdown.attr)
1711 static const struct attribute_group acpi_nfit_dimm_attribute_group = {
1713 .attrs = acpi_nfit_dimm_attributes,
1714 .is_visible = acpi_nfit_dimm_attr_visible,
1717 static const struct attribute_group *acpi_nfit_dimm_attribute_groups[] = {
1718 &acpi_nfit_dimm_attribute_group,
1722 static struct nvdimm *acpi_nfit_dimm_by_handle(struct acpi_nfit_desc *acpi_desc,
1725 struct nfit_mem *nfit_mem;
1727 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list)
1728 if (__to_nfit_memdev(nfit_mem)->device_handle == device_handle)
1729 return nfit_mem->nvdimm;
1734 void __acpi_nvdimm_notify(struct device *dev, u32 event)
1736 struct nfit_mem *nfit_mem;
1737 struct acpi_nfit_desc *acpi_desc;
1739 dev_dbg(dev->parent, "%s: event: %d\n", dev_name(dev),
1742 if (event != NFIT_NOTIFY_DIMM_HEALTH) {
1743 dev_dbg(dev->parent, "%s: unknown event: %d\n", dev_name(dev),
1748 acpi_desc = dev_get_drvdata(dev->parent);
1753 * If we successfully retrieved acpi_desc, then we know nfit_mem data
1756 nfit_mem = dev_get_drvdata(dev);
1757 if (nfit_mem && nfit_mem->flags_attr)
1758 sysfs_notify_dirent(nfit_mem->flags_attr);
1760 EXPORT_SYMBOL_GPL(__acpi_nvdimm_notify);
1762 static void acpi_nvdimm_notify(acpi_handle handle, u32 event, void *data)
1764 struct acpi_device *adev = data;
1765 struct device *dev = &adev->dev;
1767 nfit_device_lock(dev->parent);
1768 __acpi_nvdimm_notify(dev, event);
1769 nfit_device_unlock(dev->parent);
1772 static bool acpi_nvdimm_has_method(struct acpi_device *adev, char *method)
1777 status = acpi_get_handle(adev->handle, method, &handle);
1779 if (ACPI_SUCCESS(status))
1784 __weak void nfit_intel_shutdown_status(struct nfit_mem *nfit_mem)
1786 struct device *dev = &nfit_mem->adev->dev;
1787 struct nd_intel_smart smart = { 0 };
1788 union acpi_object in_buf = {
1789 .buffer.type = ACPI_TYPE_BUFFER,
1792 union acpi_object in_obj = {
1793 .package.type = ACPI_TYPE_PACKAGE,
1795 .package.elements = &in_buf,
1797 const u8 func = ND_INTEL_SMART;
1798 const guid_t *guid = to_nfit_uuid(nfit_mem->family);
1799 u8 revid = nfit_dsm_revid(nfit_mem->family, func);
1800 struct acpi_device *adev = nfit_mem->adev;
1801 acpi_handle handle = adev->handle;
1802 union acpi_object *out_obj;
1804 if ((nfit_mem->dsm_mask & (1 << func)) == 0)
1807 out_obj = acpi_evaluate_dsm(handle, guid, revid, func, &in_obj);
1808 if (!out_obj || out_obj->type != ACPI_TYPE_BUFFER
1809 || out_obj->buffer.length < sizeof(smart)) {
1810 dev_dbg(dev->parent, "%s: failed to retrieve initial health\n",
1815 memcpy(&smart, out_obj->buffer.pointer, sizeof(smart));
1818 if (smart.flags & ND_INTEL_SMART_SHUTDOWN_VALID) {
1819 if (smart.shutdown_state)
1820 set_bit(NFIT_MEM_DIRTY, &nfit_mem->flags);
1823 if (smart.flags & ND_INTEL_SMART_SHUTDOWN_COUNT_VALID) {
1824 set_bit(NFIT_MEM_DIRTY_COUNT, &nfit_mem->flags);
1825 nfit_mem->dirty_shutdown = smart.shutdown_count;
1829 static void populate_shutdown_status(struct nfit_mem *nfit_mem)
1832 * For DIMMs that provide a dynamic facility to retrieve a
1833 * dirty-shutdown status and/or a dirty-shutdown count, cache
1834 * these values in nfit_mem.
1836 if (nfit_mem->family == NVDIMM_FAMILY_INTEL)
1837 nfit_intel_shutdown_status(nfit_mem);
1840 static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
1841 struct nfit_mem *nfit_mem, u32 device_handle)
1843 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
1844 struct acpi_device *adev, *adev_dimm;
1845 struct device *dev = acpi_desc->dev;
1846 unsigned long dsm_mask, label_mask;
1850 struct acpi_nfit_control_region *dcr = nfit_mem->dcr;
1852 /* nfit test assumes 1:1 relationship between commands and dsms */
1853 nfit_mem->dsm_mask = acpi_desc->dimm_cmd_force_en;
1854 nfit_mem->family = NVDIMM_FAMILY_INTEL;
1855 set_bit(NVDIMM_FAMILY_INTEL, &nd_desc->dimm_family_mask);
1857 if (dcr->valid_fields & ACPI_NFIT_CONTROL_MFG_INFO_VALID)
1858 sprintf(nfit_mem->id, "%04x-%02x-%04x-%08x",
1859 be16_to_cpu(dcr->vendor_id),
1860 dcr->manufacturing_location,
1861 be16_to_cpu(dcr->manufacturing_date),
1862 be32_to_cpu(dcr->serial_number));
1864 sprintf(nfit_mem->id, "%04x-%08x",
1865 be16_to_cpu(dcr->vendor_id),
1866 be32_to_cpu(dcr->serial_number));
1868 adev = to_acpi_dev(acpi_desc);
1870 /* unit test case */
1871 populate_shutdown_status(nfit_mem);
1875 adev_dimm = acpi_find_child_device(adev, device_handle, false);
1876 nfit_mem->adev = adev_dimm;
1878 dev_err(dev, "no ACPI.NFIT device with _ADR %#x, disabling...\n",
1880 return force_enable_dimms ? 0 : -ENODEV;
1883 if (ACPI_FAILURE(acpi_install_notify_handler(adev_dimm->handle,
1884 ACPI_DEVICE_NOTIFY, acpi_nvdimm_notify, adev_dimm))) {
1885 dev_err(dev, "%s: notification registration failed\n",
1886 dev_name(&adev_dimm->dev));
1890 * Record nfit_mem for the notification path to track back to
1891 * the nfit sysfs attributes for this dimm device object.
1893 dev_set_drvdata(&adev_dimm->dev, nfit_mem);
1896 * There are 4 "legacy" NVDIMM command sets
1897 * (NVDIMM_FAMILY_{INTEL,MSFT,HPE1,HPE2}) that were created before
1898 * an EFI working group was established to constrain this
1899 * proliferation. The nfit driver probes for the supported command
1900 * set by GUID. Note, if you're a platform developer looking to add
1901 * a new command set to this probe, consider using an existing set,
1902 * or otherwise seek approval to publish the command set at
1903 * http://www.uefi.org/RFIC_LIST.
1905 * Note, that checking for function0 (bit0) tells us if any commands
1906 * are reachable through this GUID.
1908 clear_bit(NVDIMM_FAMILY_INTEL, &nd_desc->dimm_family_mask);
1909 for (i = 0; i <= NVDIMM_FAMILY_MAX; i++)
1910 if (acpi_check_dsm(adev_dimm->handle, to_nfit_uuid(i), 1, 1)) {
1911 set_bit(i, &nd_desc->dimm_family_mask);
1912 if (family < 0 || i == default_dsm_family)
1916 /* limit the supported commands to those that are publicly documented */
1917 nfit_mem->family = family;
1918 if (override_dsm_mask && !disable_vendor_specific)
1919 dsm_mask = override_dsm_mask;
1920 else if (nfit_mem->family == NVDIMM_FAMILY_INTEL) {
1921 dsm_mask = NVDIMM_INTEL_CMDMASK;
1922 if (disable_vendor_specific)
1923 dsm_mask &= ~(1 << ND_CMD_VENDOR);
1924 } else if (nfit_mem->family == NVDIMM_FAMILY_HPE1) {
1925 dsm_mask = 0x1c3c76;
1926 } else if (nfit_mem->family == NVDIMM_FAMILY_HPE2) {
1928 if (disable_vendor_specific)
1929 dsm_mask &= ~(1 << 8);
1930 } else if (nfit_mem->family == NVDIMM_FAMILY_MSFT) {
1931 dsm_mask = 0xffffffff;
1932 } else if (nfit_mem->family == NVDIMM_FAMILY_HYPERV) {
1935 dev_dbg(dev, "unknown dimm command family\n");
1936 nfit_mem->family = -1;
1937 /* DSMs are optional, continue loading the driver... */
1942 * Function 0 is the command interrogation function, don't
1943 * export it to potential userspace use, and enable it to be
1944 * used as an error value in acpi_nfit_ctl().
1948 guid = to_nfit_uuid(nfit_mem->family);
1949 for_each_set_bit(i, &dsm_mask, BITS_PER_LONG)
1950 if (acpi_check_dsm(adev_dimm->handle, guid,
1951 nfit_dsm_revid(nfit_mem->family, i),
1953 set_bit(i, &nfit_mem->dsm_mask);
1956 * Prefer the NVDIMM_FAMILY_INTEL label read commands if present
1957 * due to their better semantics handling locked capacity.
1959 label_mask = 1 << ND_CMD_GET_CONFIG_SIZE | 1 << ND_CMD_GET_CONFIG_DATA
1960 | 1 << ND_CMD_SET_CONFIG_DATA;
1961 if (family == NVDIMM_FAMILY_INTEL
1962 && (dsm_mask & label_mask) == label_mask)
1963 /* skip _LS{I,R,W} enabling */;
1965 if (acpi_nvdimm_has_method(adev_dimm, "_LSI")
1966 && acpi_nvdimm_has_method(adev_dimm, "_LSR")) {
1967 dev_dbg(dev, "%s: has _LSR\n", dev_name(&adev_dimm->dev));
1968 set_bit(NFIT_MEM_LSR, &nfit_mem->flags);
1971 if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)
1972 && acpi_nvdimm_has_method(adev_dimm, "_LSW")) {
1973 dev_dbg(dev, "%s: has _LSW\n", dev_name(&adev_dimm->dev));
1974 set_bit(NFIT_MEM_LSW, &nfit_mem->flags);
1978 * Quirk read-only label configurations to preserve
1979 * access to label-less namespaces by default.
1981 if (!test_bit(NFIT_MEM_LSW, &nfit_mem->flags)
1983 dev_dbg(dev, "%s: No _LSW, disable labels\n",
1984 dev_name(&adev_dimm->dev));
1985 clear_bit(NFIT_MEM_LSR, &nfit_mem->flags);
1987 dev_dbg(dev, "%s: Force enable labels\n",
1988 dev_name(&adev_dimm->dev));
1991 populate_shutdown_status(nfit_mem);
1996 static void shutdown_dimm_notify(void *data)
1998 struct acpi_nfit_desc *acpi_desc = data;
1999 struct nfit_mem *nfit_mem;
2001 mutex_lock(&acpi_desc->init_mutex);
2003 * Clear out the nfit_mem->flags_attr and shut down dimm event
2006 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
2007 struct acpi_device *adev_dimm = nfit_mem->adev;
2009 if (nfit_mem->flags_attr) {
2010 sysfs_put(nfit_mem->flags_attr);
2011 nfit_mem->flags_attr = NULL;
2014 acpi_remove_notify_handler(adev_dimm->handle,
2015 ACPI_DEVICE_NOTIFY, acpi_nvdimm_notify);
2016 dev_set_drvdata(&adev_dimm->dev, NULL);
2019 mutex_unlock(&acpi_desc->init_mutex);
2022 static const struct nvdimm_security_ops *acpi_nfit_get_security_ops(int family)
2025 case NVDIMM_FAMILY_INTEL:
2026 return intel_security_ops;
2032 static const struct nvdimm_fw_ops *acpi_nfit_get_fw_ops(
2033 struct nfit_mem *nfit_mem)
2036 struct acpi_nfit_desc *acpi_desc = nfit_mem->acpi_desc;
2037 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2039 if (!nd_desc->fw_ops)
2042 if (nfit_mem->family != NVDIMM_FAMILY_INTEL)
2045 mask = nfit_mem->dsm_mask & NVDIMM_INTEL_FW_ACTIVATE_CMDMASK;
2046 if (mask != NVDIMM_INTEL_FW_ACTIVATE_CMDMASK)
2049 return intel_fw_ops;
2052 static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
2054 struct nfit_mem *nfit_mem;
2055 int dimm_count = 0, rc;
2056 struct nvdimm *nvdimm;
2058 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
2059 struct acpi_nfit_flush_address *flush;
2060 unsigned long flags = 0, cmd_mask;
2061 struct nfit_memdev *nfit_memdev;
2065 device_handle = __to_nfit_memdev(nfit_mem)->device_handle;
2066 nvdimm = acpi_nfit_dimm_by_handle(acpi_desc, device_handle);
2072 if (nfit_mem->bdw && nfit_mem->memdev_pmem) {
2073 set_bit(NDD_ALIASING, &flags);
2074 set_bit(NDD_LABELING, &flags);
2077 /* collate flags across all memdevs for this dimm */
2078 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
2079 struct acpi_nfit_memory_map *dimm_memdev;
2081 dimm_memdev = __to_nfit_memdev(nfit_mem);
2082 if (dimm_memdev->device_handle
2083 != nfit_memdev->memdev->device_handle)
2085 dimm_memdev->flags |= nfit_memdev->memdev->flags;
2088 mem_flags = __to_nfit_memdev(nfit_mem)->flags;
2089 if (mem_flags & ACPI_NFIT_MEM_NOT_ARMED)
2090 set_bit(NDD_UNARMED, &flags);
2092 rc = acpi_nfit_add_dimm(acpi_desc, nfit_mem, device_handle);
2097 * TODO: provide translation for non-NVDIMM_FAMILY_INTEL
2098 * devices (i.e. from nd_cmd to acpi_dsm) to standardize the
2099 * userspace interface.
2101 cmd_mask = 1UL << ND_CMD_CALL;
2102 if (nfit_mem->family == NVDIMM_FAMILY_INTEL) {
2104 * These commands have a 1:1 correspondence
2105 * between DSM payload and libnvdimm ioctl
2108 cmd_mask |= nfit_mem->dsm_mask & NVDIMM_STANDARD_CMDMASK;
2111 /* Quirk to ignore LOCAL for labels on HYPERV DIMMs */
2112 if (nfit_mem->family == NVDIMM_FAMILY_HYPERV)
2113 set_bit(NDD_NOBLK, &flags);
2115 if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)) {
2116 set_bit(ND_CMD_GET_CONFIG_SIZE, &cmd_mask);
2117 set_bit(ND_CMD_GET_CONFIG_DATA, &cmd_mask);
2119 if (test_bit(NFIT_MEM_LSW, &nfit_mem->flags))
2120 set_bit(ND_CMD_SET_CONFIG_DATA, &cmd_mask);
2122 flush = nfit_mem->nfit_flush ? nfit_mem->nfit_flush->flush
2124 nvdimm = __nvdimm_create(acpi_desc->nvdimm_bus, nfit_mem,
2125 acpi_nfit_dimm_attribute_groups,
2126 flags, cmd_mask, flush ? flush->hint_count : 0,
2127 nfit_mem->flush_wpq, &nfit_mem->id[0],
2128 acpi_nfit_get_security_ops(nfit_mem->family),
2129 acpi_nfit_get_fw_ops(nfit_mem));
2133 nfit_mem->nvdimm = nvdimm;
2136 if ((mem_flags & ACPI_NFIT_MEM_FAILED_MASK) == 0)
2139 dev_err(acpi_desc->dev, "Error found in NVDIMM %s flags:%s%s%s%s%s\n",
2140 nvdimm_name(nvdimm),
2141 mem_flags & ACPI_NFIT_MEM_SAVE_FAILED ? " save_fail" : "",
2142 mem_flags & ACPI_NFIT_MEM_RESTORE_FAILED ? " restore_fail":"",
2143 mem_flags & ACPI_NFIT_MEM_FLUSH_FAILED ? " flush_fail" : "",
2144 mem_flags & ACPI_NFIT_MEM_NOT_ARMED ? " not_armed" : "",
2145 mem_flags & ACPI_NFIT_MEM_MAP_FAILED ? " map_fail" : "");
2149 rc = nvdimm_bus_check_dimm_count(acpi_desc->nvdimm_bus, dimm_count);
2154 * Now that dimms are successfully registered, and async registration
2155 * is flushed, attempt to enable event notification.
2157 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
2158 struct kernfs_node *nfit_kernfs;
2160 nvdimm = nfit_mem->nvdimm;
2164 nfit_kernfs = sysfs_get_dirent(nvdimm_kobj(nvdimm)->sd, "nfit");
2166 nfit_mem->flags_attr = sysfs_get_dirent(nfit_kernfs,
2168 sysfs_put(nfit_kernfs);
2169 if (!nfit_mem->flags_attr)
2170 dev_warn(acpi_desc->dev, "%s: notifications disabled\n",
2171 nvdimm_name(nvdimm));
2174 return devm_add_action_or_reset(acpi_desc->dev, shutdown_dimm_notify,
2179 * These constants are private because there are no kernel consumers of
2182 enum nfit_aux_cmds {
2183 NFIT_CMD_TRANSLATE_SPA = 5,
2184 NFIT_CMD_ARS_INJECT_SET = 7,
2185 NFIT_CMD_ARS_INJECT_CLEAR = 8,
2186 NFIT_CMD_ARS_INJECT_GET = 9,
2189 static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc)
2191 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2192 const guid_t *guid = to_nfit_uuid(NFIT_DEV_BUS);
2193 unsigned long dsm_mask, *mask;
2194 struct acpi_device *adev;
2197 set_bit(ND_CMD_CALL, &nd_desc->cmd_mask);
2198 set_bit(NVDIMM_BUS_FAMILY_NFIT, &nd_desc->bus_family_mask);
2200 /* enable nfit_test to inject bus command emulation */
2201 if (acpi_desc->bus_cmd_force_en) {
2202 nd_desc->cmd_mask = acpi_desc->bus_cmd_force_en;
2203 mask = &nd_desc->bus_family_mask;
2204 if (acpi_desc->family_dsm_mask[NVDIMM_BUS_FAMILY_INTEL]) {
2205 set_bit(NVDIMM_BUS_FAMILY_INTEL, mask);
2206 nd_desc->fw_ops = intel_bus_fw_ops;
2210 adev = to_acpi_dev(acpi_desc);
2214 for (i = ND_CMD_ARS_CAP; i <= ND_CMD_CLEAR_ERROR; i++)
2215 if (acpi_check_dsm(adev->handle, guid, 1, 1ULL << i))
2216 set_bit(i, &nd_desc->cmd_mask);
2219 (1 << ND_CMD_ARS_CAP) |
2220 (1 << ND_CMD_ARS_START) |
2221 (1 << ND_CMD_ARS_STATUS) |
2222 (1 << ND_CMD_CLEAR_ERROR) |
2223 (1 << NFIT_CMD_TRANSLATE_SPA) |
2224 (1 << NFIT_CMD_ARS_INJECT_SET) |
2225 (1 << NFIT_CMD_ARS_INJECT_CLEAR) |
2226 (1 << NFIT_CMD_ARS_INJECT_GET);
2227 for_each_set_bit(i, &dsm_mask, BITS_PER_LONG)
2228 if (acpi_check_dsm(adev->handle, guid, 1, 1ULL << i))
2229 set_bit(i, &acpi_desc->bus_dsm_mask);
2231 /* Enumerate allowed NVDIMM_BUS_FAMILY_INTEL commands */
2232 dsm_mask = NVDIMM_BUS_INTEL_FW_ACTIVATE_CMDMASK;
2233 guid = to_nfit_bus_uuid(NVDIMM_BUS_FAMILY_INTEL);
2234 mask = &acpi_desc->family_dsm_mask[NVDIMM_BUS_FAMILY_INTEL];
2235 for_each_set_bit(i, &dsm_mask, BITS_PER_LONG)
2236 if (acpi_check_dsm(adev->handle, guid, 1, 1ULL << i))
2239 if (*mask == dsm_mask) {
2240 set_bit(NVDIMM_BUS_FAMILY_INTEL, &nd_desc->bus_family_mask);
2241 nd_desc->fw_ops = intel_bus_fw_ops;
2245 static ssize_t range_index_show(struct device *dev,
2246 struct device_attribute *attr, char *buf)
2248 struct nd_region *nd_region = to_nd_region(dev);
2249 struct nfit_spa *nfit_spa = nd_region_provider_data(nd_region);
2251 return sprintf(buf, "%d\n", nfit_spa->spa->range_index);
2253 static DEVICE_ATTR_RO(range_index);
2255 static struct attribute *acpi_nfit_region_attributes[] = {
2256 &dev_attr_range_index.attr,
2260 static const struct attribute_group acpi_nfit_region_attribute_group = {
2262 .attrs = acpi_nfit_region_attributes,
2265 static const struct attribute_group *acpi_nfit_region_attribute_groups[] = {
2266 &acpi_nfit_region_attribute_group,
2270 /* enough info to uniquely specify an interleave set */
2271 struct nfit_set_info {
2272 struct nfit_set_info_map {
2279 struct nfit_set_info2 {
2280 struct nfit_set_info_map2 {
2284 u16 manufacturing_date;
2285 u8 manufacturing_location;
2290 static size_t sizeof_nfit_set_info(int num_mappings)
2292 return sizeof(struct nfit_set_info)
2293 + num_mappings * sizeof(struct nfit_set_info_map);
2296 static size_t sizeof_nfit_set_info2(int num_mappings)
2298 return sizeof(struct nfit_set_info2)
2299 + num_mappings * sizeof(struct nfit_set_info_map2);
2302 static int cmp_map_compat(const void *m0, const void *m1)
2304 const struct nfit_set_info_map *map0 = m0;
2305 const struct nfit_set_info_map *map1 = m1;
2307 return memcmp(&map0->region_offset, &map1->region_offset,
2311 static int cmp_map(const void *m0, const void *m1)
2313 const struct nfit_set_info_map *map0 = m0;
2314 const struct nfit_set_info_map *map1 = m1;
2316 if (map0->region_offset < map1->region_offset)
2318 else if (map0->region_offset > map1->region_offset)
2323 static int cmp_map2(const void *m0, const void *m1)
2325 const struct nfit_set_info_map2 *map0 = m0;
2326 const struct nfit_set_info_map2 *map1 = m1;
2328 if (map0->region_offset < map1->region_offset)
2330 else if (map0->region_offset > map1->region_offset)
2335 /* Retrieve the nth entry referencing this spa */
2336 static struct acpi_nfit_memory_map *memdev_from_spa(
2337 struct acpi_nfit_desc *acpi_desc, u16 range_index, int n)
2339 struct nfit_memdev *nfit_memdev;
2341 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list)
2342 if (nfit_memdev->memdev->range_index == range_index)
2344 return nfit_memdev->memdev;
2348 static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc *acpi_desc,
2349 struct nd_region_desc *ndr_desc,
2350 struct acpi_nfit_system_address *spa)
2352 struct device *dev = acpi_desc->dev;
2353 struct nd_interleave_set *nd_set;
2354 u16 nr = ndr_desc->num_mappings;
2355 struct nfit_set_info2 *info2;
2356 struct nfit_set_info *info;
2359 nd_set = devm_kzalloc(dev, sizeof(*nd_set), GFP_KERNEL);
2362 import_guid(&nd_set->type_guid, spa->range_guid);
2364 info = devm_kzalloc(dev, sizeof_nfit_set_info(nr), GFP_KERNEL);
2368 info2 = devm_kzalloc(dev, sizeof_nfit_set_info2(nr), GFP_KERNEL);
2372 for (i = 0; i < nr; i++) {
2373 struct nd_mapping_desc *mapping = &ndr_desc->mapping[i];
2374 struct nfit_set_info_map *map = &info->mapping[i];
2375 struct nfit_set_info_map2 *map2 = &info2->mapping[i];
2376 struct nvdimm *nvdimm = mapping->nvdimm;
2377 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
2378 struct acpi_nfit_memory_map *memdev = memdev_from_spa(acpi_desc,
2379 spa->range_index, i);
2380 struct acpi_nfit_control_region *dcr = nfit_mem->dcr;
2382 if (!memdev || !nfit_mem->dcr) {
2383 dev_err(dev, "%s: failed to find DCR\n", __func__);
2387 map->region_offset = memdev->region_offset;
2388 map->serial_number = dcr->serial_number;
2390 map2->region_offset = memdev->region_offset;
2391 map2->serial_number = dcr->serial_number;
2392 map2->vendor_id = dcr->vendor_id;
2393 map2->manufacturing_date = dcr->manufacturing_date;
2394 map2->manufacturing_location = dcr->manufacturing_location;
2397 /* v1.1 namespaces */
2398 sort(&info->mapping[0], nr, sizeof(struct nfit_set_info_map),
2400 nd_set->cookie1 = nd_fletcher64(info, sizeof_nfit_set_info(nr), 0);
2402 /* v1.2 namespaces */
2403 sort(&info2->mapping[0], nr, sizeof(struct nfit_set_info_map2),
2405 nd_set->cookie2 = nd_fletcher64(info2, sizeof_nfit_set_info2(nr), 0);
2407 /* support v1.1 namespaces created with the wrong sort order */
2408 sort(&info->mapping[0], nr, sizeof(struct nfit_set_info_map),
2409 cmp_map_compat, NULL);
2410 nd_set->altcookie = nd_fletcher64(info, sizeof_nfit_set_info(nr), 0);
2412 /* record the result of the sort for the mapping position */
2413 for (i = 0; i < nr; i++) {
2414 struct nfit_set_info_map2 *map2 = &info2->mapping[i];
2417 for (j = 0; j < nr; j++) {
2418 struct nd_mapping_desc *mapping = &ndr_desc->mapping[j];
2419 struct nvdimm *nvdimm = mapping->nvdimm;
2420 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
2421 struct acpi_nfit_control_region *dcr = nfit_mem->dcr;
2423 if (map2->serial_number == dcr->serial_number &&
2424 map2->vendor_id == dcr->vendor_id &&
2425 map2->manufacturing_date == dcr->manufacturing_date &&
2426 map2->manufacturing_location
2427 == dcr->manufacturing_location) {
2428 mapping->position = i;
2434 ndr_desc->nd_set = nd_set;
2435 devm_kfree(dev, info);
2436 devm_kfree(dev, info2);
2441 static u64 to_interleave_offset(u64 offset, struct nfit_blk_mmio *mmio)
2443 struct acpi_nfit_interleave *idt = mmio->idt;
2444 u32 sub_line_offset, line_index, line_offset;
2445 u64 line_no, table_skip_count, table_offset;
2447 line_no = div_u64_rem(offset, mmio->line_size, &sub_line_offset);
2448 table_skip_count = div_u64_rem(line_no, mmio->num_lines, &line_index);
2449 line_offset = idt->line_offset[line_index]
2451 table_offset = table_skip_count * mmio->table_size;
2453 return mmio->base_offset + line_offset + table_offset + sub_line_offset;
2456 static u32 read_blk_stat(struct nfit_blk *nfit_blk, unsigned int bw)
2458 struct nfit_blk_mmio *mmio = &nfit_blk->mmio[DCR];
2459 u64 offset = nfit_blk->stat_offset + mmio->size * bw;
2460 const u32 STATUS_MASK = 0x80000037;
2462 if (mmio->num_lines)
2463 offset = to_interleave_offset(offset, mmio);
2465 return readl(mmio->addr.base + offset) & STATUS_MASK;
2468 static void write_blk_ctl(struct nfit_blk *nfit_blk, unsigned int bw,
2469 resource_size_t dpa, unsigned int len, unsigned int write)
2472 struct nfit_blk_mmio *mmio = &nfit_blk->mmio[DCR];
2475 BCW_OFFSET_MASK = (1ULL << 48)-1,
2477 BCW_LEN_MASK = (1ULL << 8) - 1,
2481 cmd = (dpa >> L1_CACHE_SHIFT) & BCW_OFFSET_MASK;
2482 len = len >> L1_CACHE_SHIFT;
2483 cmd |= ((u64) len & BCW_LEN_MASK) << BCW_LEN_SHIFT;
2484 cmd |= ((u64) write) << BCW_CMD_SHIFT;
2486 offset = nfit_blk->cmd_offset + mmio->size * bw;
2487 if (mmio->num_lines)
2488 offset = to_interleave_offset(offset, mmio);
2490 writeq(cmd, mmio->addr.base + offset);
2491 nvdimm_flush(nfit_blk->nd_region, NULL);
2493 if (nfit_blk->dimm_flags & NFIT_BLK_DCR_LATCH)
2494 readq(mmio->addr.base + offset);
2497 static int acpi_nfit_blk_single_io(struct nfit_blk *nfit_blk,
2498 resource_size_t dpa, void *iobuf, size_t len, int rw,
2501 struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
2502 unsigned int copied = 0;
2506 base_offset = nfit_blk->bdw_offset + dpa % L1_CACHE_BYTES
2507 + lane * mmio->size;
2508 write_blk_ctl(nfit_blk, lane, dpa, len, rw);
2513 if (mmio->num_lines) {
2516 offset = to_interleave_offset(base_offset + copied,
2518 div_u64_rem(offset, mmio->line_size, &line_offset);
2519 c = min_t(size_t, len, mmio->line_size - line_offset);
2521 offset = base_offset + nfit_blk->bdw_offset;
2526 memcpy_flushcache(mmio->addr.aperture + offset, iobuf + copied, c);
2528 if (nfit_blk->dimm_flags & NFIT_BLK_READ_FLUSH)
2529 arch_invalidate_pmem((void __force *)
2530 mmio->addr.aperture + offset, c);
2532 memcpy(iobuf + copied, mmio->addr.aperture + offset, c);
2540 nvdimm_flush(nfit_blk->nd_region, NULL);
2542 rc = read_blk_stat(nfit_blk, lane) ? -EIO : 0;
2546 static int acpi_nfit_blk_region_do_io(struct nd_blk_region *ndbr,
2547 resource_size_t dpa, void *iobuf, u64 len, int rw)
2549 struct nfit_blk *nfit_blk = nd_blk_region_provider_data(ndbr);
2550 struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
2551 struct nd_region *nd_region = nfit_blk->nd_region;
2552 unsigned int lane, copied = 0;
2555 lane = nd_region_acquire_lane(nd_region);
2557 u64 c = min(len, mmio->size);
2559 rc = acpi_nfit_blk_single_io(nfit_blk, dpa + copied,
2560 iobuf + copied, c, rw, lane);
2567 nd_region_release_lane(nd_region, lane);
2572 static int nfit_blk_init_interleave(struct nfit_blk_mmio *mmio,
2573 struct acpi_nfit_interleave *idt, u16 interleave_ways)
2576 mmio->num_lines = idt->line_count;
2577 mmio->line_size = idt->line_size;
2578 if (interleave_ways == 0)
2580 mmio->table_size = mmio->num_lines * interleave_ways
2587 static int acpi_nfit_blk_get_flags(struct nvdimm_bus_descriptor *nd_desc,
2588 struct nvdimm *nvdimm, struct nfit_blk *nfit_blk)
2590 struct nd_cmd_dimm_flags flags;
2593 memset(&flags, 0, sizeof(flags));
2594 rc = nd_desc->ndctl(nd_desc, nvdimm, ND_CMD_DIMM_FLAGS, &flags,
2595 sizeof(flags), NULL);
2597 if (rc >= 0 && flags.status == 0)
2598 nfit_blk->dimm_flags = flags.flags;
2599 else if (rc == -ENOTTY) {
2600 /* fall back to a conservative default */
2601 nfit_blk->dimm_flags = NFIT_BLK_DCR_LATCH | NFIT_BLK_READ_FLUSH;
2609 static int acpi_nfit_blk_region_enable(struct nvdimm_bus *nvdimm_bus,
2612 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
2613 struct nd_blk_region *ndbr = to_nd_blk_region(dev);
2614 struct nfit_blk_mmio *mmio;
2615 struct nfit_blk *nfit_blk;
2616 struct nfit_mem *nfit_mem;
2617 struct nvdimm *nvdimm;
2620 nvdimm = nd_blk_region_to_dimm(ndbr);
2621 nfit_mem = nvdimm_provider_data(nvdimm);
2622 if (!nfit_mem || !nfit_mem->dcr || !nfit_mem->bdw) {
2623 dev_dbg(dev, "missing%s%s%s\n",
2624 nfit_mem ? "" : " nfit_mem",
2625 (nfit_mem && nfit_mem->dcr) ? "" : " dcr",
2626 (nfit_mem && nfit_mem->bdw) ? "" : " bdw");
2630 nfit_blk = devm_kzalloc(dev, sizeof(*nfit_blk), GFP_KERNEL);
2633 nd_blk_region_set_provider_data(ndbr, nfit_blk);
2634 nfit_blk->nd_region = to_nd_region(dev);
2636 /* map block aperture memory */
2637 nfit_blk->bdw_offset = nfit_mem->bdw->offset;
2638 mmio = &nfit_blk->mmio[BDW];
2639 mmio->addr.base = devm_nvdimm_memremap(dev, nfit_mem->spa_bdw->address,
2640 nfit_mem->spa_bdw->length, nd_blk_memremap_flags(ndbr));
2641 if (!mmio->addr.base) {
2642 dev_dbg(dev, "%s failed to map bdw\n",
2643 nvdimm_name(nvdimm));
2646 mmio->size = nfit_mem->bdw->size;
2647 mmio->base_offset = nfit_mem->memdev_bdw->region_offset;
2648 mmio->idt = nfit_mem->idt_bdw;
2649 mmio->spa = nfit_mem->spa_bdw;
2650 rc = nfit_blk_init_interleave(mmio, nfit_mem->idt_bdw,
2651 nfit_mem->memdev_bdw->interleave_ways);
2653 dev_dbg(dev, "%s failed to init bdw interleave\n",
2654 nvdimm_name(nvdimm));
2658 /* map block control memory */
2659 nfit_blk->cmd_offset = nfit_mem->dcr->command_offset;
2660 nfit_blk->stat_offset = nfit_mem->dcr->status_offset;
2661 mmio = &nfit_blk->mmio[DCR];
2662 mmio->addr.base = devm_nvdimm_ioremap(dev, nfit_mem->spa_dcr->address,
2663 nfit_mem->spa_dcr->length);
2664 if (!mmio->addr.base) {
2665 dev_dbg(dev, "%s failed to map dcr\n",
2666 nvdimm_name(nvdimm));
2669 mmio->size = nfit_mem->dcr->window_size;
2670 mmio->base_offset = nfit_mem->memdev_dcr->region_offset;
2671 mmio->idt = nfit_mem->idt_dcr;
2672 mmio->spa = nfit_mem->spa_dcr;
2673 rc = nfit_blk_init_interleave(mmio, nfit_mem->idt_dcr,
2674 nfit_mem->memdev_dcr->interleave_ways);
2676 dev_dbg(dev, "%s failed to init dcr interleave\n",
2677 nvdimm_name(nvdimm));
2681 rc = acpi_nfit_blk_get_flags(nd_desc, nvdimm, nfit_blk);
2683 dev_dbg(dev, "%s failed get DIMM flags\n",
2684 nvdimm_name(nvdimm));
2688 if (nvdimm_has_flush(nfit_blk->nd_region) < 0)
2689 dev_warn(dev, "unable to guarantee persistence of writes\n");
2691 if (mmio->line_size == 0)
2694 if ((u32) nfit_blk->cmd_offset % mmio->line_size
2695 + 8 > mmio->line_size) {
2696 dev_dbg(dev, "cmd_offset crosses interleave boundary\n");
2698 } else if ((u32) nfit_blk->stat_offset % mmio->line_size
2699 + 8 > mmio->line_size) {
2700 dev_dbg(dev, "stat_offset crosses interleave boundary\n");
2707 static int ars_get_cap(struct acpi_nfit_desc *acpi_desc,
2708 struct nd_cmd_ars_cap *cmd, struct nfit_spa *nfit_spa)
2710 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2711 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2714 cmd->address = spa->address;
2715 cmd->length = spa->length;
2716 rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_CAP, cmd,
2717 sizeof(*cmd), &cmd_rc);
2723 static int ars_start(struct acpi_nfit_desc *acpi_desc,
2724 struct nfit_spa *nfit_spa, enum nfit_ars_state req_type)
2728 struct nd_cmd_ars_start ars_start;
2729 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2730 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2732 memset(&ars_start, 0, sizeof(ars_start));
2733 ars_start.address = spa->address;
2734 ars_start.length = spa->length;
2735 if (req_type == ARS_REQ_SHORT)
2736 ars_start.flags = ND_ARS_RETURN_PREV_DATA;
2737 if (nfit_spa_type(spa) == NFIT_SPA_PM)
2738 ars_start.type = ND_ARS_PERSISTENT;
2739 else if (nfit_spa_type(spa) == NFIT_SPA_VOLATILE)
2740 ars_start.type = ND_ARS_VOLATILE;
2744 rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_START, &ars_start,
2745 sizeof(ars_start), &cmd_rc);
2751 set_bit(ARS_VALID, &acpi_desc->scrub_flags);
2755 static int ars_continue(struct acpi_nfit_desc *acpi_desc)
2758 struct nd_cmd_ars_start ars_start;
2759 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2760 struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
2762 ars_start = (struct nd_cmd_ars_start) {
2763 .address = ars_status->restart_address,
2764 .length = ars_status->restart_length,
2765 .type = ars_status->type,
2767 rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_START, &ars_start,
2768 sizeof(ars_start), &cmd_rc);
2774 static int ars_get_status(struct acpi_nfit_desc *acpi_desc)
2776 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2777 struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
2780 rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_STATUS, ars_status,
2781 acpi_desc->max_ars, &cmd_rc);
2787 static void ars_complete(struct acpi_nfit_desc *acpi_desc,
2788 struct nfit_spa *nfit_spa)
2790 struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
2791 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2792 struct nd_region *nd_region = nfit_spa->nd_region;
2795 lockdep_assert_held(&acpi_desc->init_mutex);
2797 * Only advance the ARS state for ARS runs initiated by the
2798 * kernel, ignore ARS results from BIOS initiated runs for scrub
2799 * completion tracking.
2801 if (acpi_desc->scrub_spa != nfit_spa)
2804 if ((ars_status->address >= spa->address && ars_status->address
2805 < spa->address + spa->length)
2806 || (ars_status->address < spa->address)) {
2808 * Assume that if a scrub starts at an offset from the
2809 * start of nfit_spa that we are in the continuation
2812 * Otherwise, if the scrub covers the spa range, mark
2813 * any pending request complete.
2815 if (ars_status->address + ars_status->length
2816 >= spa->address + spa->length)
2823 acpi_desc->scrub_spa = NULL;
2825 dev = nd_region_dev(nd_region);
2826 nvdimm_region_notify(nd_region, NVDIMM_REVALIDATE_POISON);
2828 dev = acpi_desc->dev;
2829 dev_dbg(dev, "ARS: range %d complete\n", spa->range_index);
2832 static int ars_status_process_records(struct acpi_nfit_desc *acpi_desc)
2834 struct nvdimm_bus *nvdimm_bus = acpi_desc->nvdimm_bus;
2835 struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
2840 * First record starts at 44 byte offset from the start of the
2843 if (ars_status->out_length < 44)
2847 * Ignore potentially stale results that are only refreshed
2848 * after a start-ARS event.
2850 if (!test_and_clear_bit(ARS_VALID, &acpi_desc->scrub_flags)) {
2851 dev_dbg(acpi_desc->dev, "skip %d stale records\n",
2852 ars_status->num_records);
2856 for (i = 0; i < ars_status->num_records; i++) {
2857 /* only process full records */
2858 if (ars_status->out_length
2859 < 44 + sizeof(struct nd_ars_record) * (i + 1))
2861 rc = nvdimm_bus_add_badrange(nvdimm_bus,
2862 ars_status->records[i].err_address,
2863 ars_status->records[i].length);
2867 if (i < ars_status->num_records)
2868 dev_warn(acpi_desc->dev, "detected truncated ars results\n");
2873 static void acpi_nfit_remove_resource(void *data)
2875 struct resource *res = data;
2877 remove_resource(res);
2880 static int acpi_nfit_insert_resource(struct acpi_nfit_desc *acpi_desc,
2881 struct nd_region_desc *ndr_desc)
2883 struct resource *res, *nd_res = ndr_desc->res;
2886 /* No operation if the region is already registered as PMEM */
2887 is_pmem = region_intersects(nd_res->start, resource_size(nd_res),
2888 IORESOURCE_MEM, IORES_DESC_PERSISTENT_MEMORY);
2889 if (is_pmem == REGION_INTERSECTS)
2892 res = devm_kzalloc(acpi_desc->dev, sizeof(*res), GFP_KERNEL);
2896 res->name = "Persistent Memory";
2897 res->start = nd_res->start;
2898 res->end = nd_res->end;
2899 res->flags = IORESOURCE_MEM;
2900 res->desc = IORES_DESC_PERSISTENT_MEMORY;
2902 ret = insert_resource(&iomem_resource, res);
2906 ret = devm_add_action_or_reset(acpi_desc->dev,
2907 acpi_nfit_remove_resource,
2915 static int acpi_nfit_init_mapping(struct acpi_nfit_desc *acpi_desc,
2916 struct nd_mapping_desc *mapping, struct nd_region_desc *ndr_desc,
2917 struct acpi_nfit_memory_map *memdev,
2918 struct nfit_spa *nfit_spa)
2920 struct nvdimm *nvdimm = acpi_nfit_dimm_by_handle(acpi_desc,
2921 memdev->device_handle);
2922 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2923 struct nd_blk_region_desc *ndbr_desc;
2924 struct nfit_mem *nfit_mem;
2928 dev_err(acpi_desc->dev, "spa%d dimm: %#x not found\n",
2929 spa->range_index, memdev->device_handle);
2933 mapping->nvdimm = nvdimm;
2934 switch (nfit_spa_type(spa)) {
2936 case NFIT_SPA_VOLATILE:
2937 mapping->start = memdev->address;
2938 mapping->size = memdev->region_size;
2941 nfit_mem = nvdimm_provider_data(nvdimm);
2942 if (!nfit_mem || !nfit_mem->bdw) {
2943 dev_dbg(acpi_desc->dev, "spa%d %s missing bdw\n",
2944 spa->range_index, nvdimm_name(nvdimm));
2948 mapping->size = nfit_mem->bdw->capacity;
2949 mapping->start = nfit_mem->bdw->start_address;
2950 ndr_desc->num_lanes = nfit_mem->bdw->windows;
2951 ndr_desc->mapping = mapping;
2952 ndr_desc->num_mappings = 1;
2953 ndbr_desc = to_blk_region_desc(ndr_desc);
2954 ndbr_desc->enable = acpi_nfit_blk_region_enable;
2955 ndbr_desc->do_io = acpi_desc->blk_do_io;
2956 rc = acpi_nfit_init_interleave_set(acpi_desc, ndr_desc, spa);
2959 nfit_spa->nd_region = nvdimm_blk_region_create(acpi_desc->nvdimm_bus,
2961 if (!nfit_spa->nd_region)
2969 static bool nfit_spa_is_virtual(struct acpi_nfit_system_address *spa)
2971 return (nfit_spa_type(spa) == NFIT_SPA_VDISK ||
2972 nfit_spa_type(spa) == NFIT_SPA_VCD ||
2973 nfit_spa_type(spa) == NFIT_SPA_PDISK ||
2974 nfit_spa_type(spa) == NFIT_SPA_PCD);
2977 static bool nfit_spa_is_volatile(struct acpi_nfit_system_address *spa)
2979 return (nfit_spa_type(spa) == NFIT_SPA_VDISK ||
2980 nfit_spa_type(spa) == NFIT_SPA_VCD ||
2981 nfit_spa_type(spa) == NFIT_SPA_VOLATILE);
2984 static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc,
2985 struct nfit_spa *nfit_spa)
2987 static struct nd_mapping_desc mappings[ND_MAX_MAPPINGS];
2988 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2989 struct nd_blk_region_desc ndbr_desc;
2990 struct nd_region_desc *ndr_desc;
2991 struct nfit_memdev *nfit_memdev;
2992 struct nvdimm_bus *nvdimm_bus;
2993 struct resource res;
2996 if (nfit_spa->nd_region)
2999 if (spa->range_index == 0 && !nfit_spa_is_virtual(spa)) {
3000 dev_dbg(acpi_desc->dev, "detected invalid spa index\n");
3004 memset(&res, 0, sizeof(res));
3005 memset(&mappings, 0, sizeof(mappings));
3006 memset(&ndbr_desc, 0, sizeof(ndbr_desc));
3007 res.start = spa->address;
3008 res.end = res.start + spa->length - 1;
3009 ndr_desc = &ndbr_desc.ndr_desc;
3010 ndr_desc->res = &res;
3011 ndr_desc->provider_data = nfit_spa;
3012 ndr_desc->attr_groups = acpi_nfit_region_attribute_groups;
3013 if (spa->flags & ACPI_NFIT_PROXIMITY_VALID) {
3014 ndr_desc->numa_node = pxm_to_online_node(spa->proximity_domain);
3015 ndr_desc->target_node = pxm_to_node(spa->proximity_domain);
3017 ndr_desc->numa_node = NUMA_NO_NODE;
3018 ndr_desc->target_node = NUMA_NO_NODE;
3021 /* Fallback to address based numa information if node lookup failed */
3022 if (ndr_desc->numa_node == NUMA_NO_NODE) {
3023 ndr_desc->numa_node = memory_add_physaddr_to_nid(spa->address);
3024 dev_info(acpi_desc->dev, "changing numa node from %d to %d for nfit region [%pa-%pa]",
3025 NUMA_NO_NODE, ndr_desc->numa_node, &res.start, &res.end);
3027 if (ndr_desc->target_node == NUMA_NO_NODE) {
3028 ndr_desc->target_node = phys_to_target_node(spa->address);
3029 dev_info(acpi_desc->dev, "changing target node from %d to %d for nfit region [%pa-%pa]",
3030 NUMA_NO_NODE, ndr_desc->numa_node, &res.start, &res.end);
3034 * Persistence domain bits are hierarchical, if
3035 * ACPI_NFIT_CAPABILITY_CACHE_FLUSH is set then
3036 * ACPI_NFIT_CAPABILITY_MEM_FLUSH is implied.
3038 if (acpi_desc->platform_cap & ACPI_NFIT_CAPABILITY_CACHE_FLUSH)
3039 set_bit(ND_REGION_PERSIST_CACHE, &ndr_desc->flags);
3040 else if (acpi_desc->platform_cap & ACPI_NFIT_CAPABILITY_MEM_FLUSH)
3041 set_bit(ND_REGION_PERSIST_MEMCTRL, &ndr_desc->flags);
3043 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
3044 struct acpi_nfit_memory_map *memdev = nfit_memdev->memdev;
3045 struct nd_mapping_desc *mapping;
3047 /* range index 0 == unmapped in SPA or invalid-SPA */
3048 if (memdev->range_index == 0 || spa->range_index == 0)
3050 if (memdev->range_index != spa->range_index)
3052 if (count >= ND_MAX_MAPPINGS) {
3053 dev_err(acpi_desc->dev, "spa%d exceeds max mappings %d\n",
3054 spa->range_index, ND_MAX_MAPPINGS);
3057 mapping = &mappings[count++];
3058 rc = acpi_nfit_init_mapping(acpi_desc, mapping, ndr_desc,
3064 ndr_desc->mapping = mappings;
3065 ndr_desc->num_mappings = count;
3066 rc = acpi_nfit_init_interleave_set(acpi_desc, ndr_desc, spa);
3070 nvdimm_bus = acpi_desc->nvdimm_bus;
3071 if (nfit_spa_type(spa) == NFIT_SPA_PM) {
3072 rc = acpi_nfit_insert_resource(acpi_desc, ndr_desc);
3074 dev_warn(acpi_desc->dev,
3075 "failed to insert pmem resource to iomem: %d\n",
3080 nfit_spa->nd_region = nvdimm_pmem_region_create(nvdimm_bus,
3082 if (!nfit_spa->nd_region)
3084 } else if (nfit_spa_is_volatile(spa)) {
3085 nfit_spa->nd_region = nvdimm_volatile_region_create(nvdimm_bus,
3087 if (!nfit_spa->nd_region)
3089 } else if (nfit_spa_is_virtual(spa)) {
3090 nfit_spa->nd_region = nvdimm_pmem_region_create(nvdimm_bus,
3092 if (!nfit_spa->nd_region)
3098 dev_err(acpi_desc->dev, "failed to register spa range %d\n",
3099 nfit_spa->spa->range_index);
3103 static int ars_status_alloc(struct acpi_nfit_desc *acpi_desc)
3105 struct device *dev = acpi_desc->dev;
3106 struct nd_cmd_ars_status *ars_status;
3108 if (acpi_desc->ars_status) {
3109 memset(acpi_desc->ars_status, 0, acpi_desc->max_ars);
3113 ars_status = devm_kzalloc(dev, acpi_desc->max_ars, GFP_KERNEL);
3116 acpi_desc->ars_status = ars_status;
3120 static int acpi_nfit_query_poison(struct acpi_nfit_desc *acpi_desc)
3124 if (ars_status_alloc(acpi_desc))
3127 rc = ars_get_status(acpi_desc);
3129 if (rc < 0 && rc != -ENOSPC)
3132 if (ars_status_process_records(acpi_desc))
3133 dev_err(acpi_desc->dev, "Failed to process ARS records\n");
3138 static int ars_register(struct acpi_nfit_desc *acpi_desc,
3139 struct nfit_spa *nfit_spa)
3143 if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
3144 return acpi_nfit_register_region(acpi_desc, nfit_spa);
3146 set_bit(ARS_REQ_SHORT, &nfit_spa->ars_state);
3148 set_bit(ARS_REQ_LONG, &nfit_spa->ars_state);
3150 switch (acpi_nfit_query_poison(acpi_desc)) {
3154 rc = ars_start(acpi_desc, nfit_spa, ARS_REQ_SHORT);
3155 /* shouldn't happen, try again later */
3159 set_bit(ARS_FAILED, &nfit_spa->ars_state);
3162 clear_bit(ARS_REQ_SHORT, &nfit_spa->ars_state);
3163 rc = acpi_nfit_query_poison(acpi_desc);
3166 acpi_desc->scrub_spa = nfit_spa;
3167 ars_complete(acpi_desc, nfit_spa);
3169 * If ars_complete() says we didn't complete the
3170 * short scrub, we'll try again with a long
3173 acpi_desc->scrub_spa = NULL;
3178 * BIOS was using ARS, wait for it to complete (or
3179 * resources to become available) and then perform our
3184 set_bit(ARS_FAILED, &nfit_spa->ars_state);
3188 return acpi_nfit_register_region(acpi_desc, nfit_spa);
3191 static void ars_complete_all(struct acpi_nfit_desc *acpi_desc)
3193 struct nfit_spa *nfit_spa;
3195 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3196 if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
3198 ars_complete(acpi_desc, nfit_spa);
3202 static unsigned int __acpi_nfit_scrub(struct acpi_nfit_desc *acpi_desc,
3205 unsigned int tmo = acpi_desc->scrub_tmo;
3206 struct device *dev = acpi_desc->dev;
3207 struct nfit_spa *nfit_spa;
3209 lockdep_assert_held(&acpi_desc->init_mutex);
3211 if (test_bit(ARS_CANCEL, &acpi_desc->scrub_flags))
3214 if (query_rc == -EBUSY) {
3215 dev_dbg(dev, "ARS: ARS busy\n");
3216 return min(30U * 60U, tmo * 2);
3218 if (query_rc == -ENOSPC) {
3219 dev_dbg(dev, "ARS: ARS continue\n");
3220 ars_continue(acpi_desc);
3223 if (query_rc && query_rc != -EAGAIN) {
3224 unsigned long long addr, end;
3226 addr = acpi_desc->ars_status->address;
3227 end = addr + acpi_desc->ars_status->length;
3228 dev_dbg(dev, "ARS: %llx-%llx failed (%d)\n", addr, end,
3232 ars_complete_all(acpi_desc);
3233 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3234 enum nfit_ars_state req_type;
3237 if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
3240 /* prefer short ARS requests first */
3241 if (test_bit(ARS_REQ_SHORT, &nfit_spa->ars_state))
3242 req_type = ARS_REQ_SHORT;
3243 else if (test_bit(ARS_REQ_LONG, &nfit_spa->ars_state))
3244 req_type = ARS_REQ_LONG;
3247 rc = ars_start(acpi_desc, nfit_spa, req_type);
3249 dev = nd_region_dev(nfit_spa->nd_region);
3250 dev_dbg(dev, "ARS: range %d ARS start %s (%d)\n",
3251 nfit_spa->spa->range_index,
3252 req_type == ARS_REQ_SHORT ? "short" : "long",
3255 * Hmm, we raced someone else starting ARS? Try again in
3261 dev_WARN_ONCE(dev, acpi_desc->scrub_spa,
3262 "scrub start while range %d active\n",
3263 acpi_desc->scrub_spa->spa->range_index);
3264 clear_bit(req_type, &nfit_spa->ars_state);
3265 acpi_desc->scrub_spa = nfit_spa;
3267 * Consider this spa last for future scrub
3270 list_move_tail(&nfit_spa->list, &acpi_desc->spas);
3274 dev_err(dev, "ARS: range %d ARS failed (%d)\n",
3275 nfit_spa->spa->range_index, rc);
3276 set_bit(ARS_FAILED, &nfit_spa->ars_state);
3281 static void __sched_ars(struct acpi_nfit_desc *acpi_desc, unsigned int tmo)
3283 lockdep_assert_held(&acpi_desc->init_mutex);
3285 set_bit(ARS_BUSY, &acpi_desc->scrub_flags);
3286 /* note this should only be set from within the workqueue */
3288 acpi_desc->scrub_tmo = tmo;
3289 queue_delayed_work(nfit_wq, &acpi_desc->dwork, tmo * HZ);
3292 static void sched_ars(struct acpi_nfit_desc *acpi_desc)
3294 __sched_ars(acpi_desc, 0);
3297 static void notify_ars_done(struct acpi_nfit_desc *acpi_desc)
3299 lockdep_assert_held(&acpi_desc->init_mutex);
3301 clear_bit(ARS_BUSY, &acpi_desc->scrub_flags);
3302 acpi_desc->scrub_count++;
3303 if (acpi_desc->scrub_count_state)
3304 sysfs_notify_dirent(acpi_desc->scrub_count_state);
3307 static void acpi_nfit_scrub(struct work_struct *work)
3309 struct acpi_nfit_desc *acpi_desc;
3313 acpi_desc = container_of(work, typeof(*acpi_desc), dwork.work);
3314 mutex_lock(&acpi_desc->init_mutex);
3315 query_rc = acpi_nfit_query_poison(acpi_desc);
3316 tmo = __acpi_nfit_scrub(acpi_desc, query_rc);
3318 __sched_ars(acpi_desc, tmo);
3320 notify_ars_done(acpi_desc);
3321 memset(acpi_desc->ars_status, 0, acpi_desc->max_ars);
3322 clear_bit(ARS_POLL, &acpi_desc->scrub_flags);
3323 mutex_unlock(&acpi_desc->init_mutex);
3326 static void acpi_nfit_init_ars(struct acpi_nfit_desc *acpi_desc,
3327 struct nfit_spa *nfit_spa)
3329 int type = nfit_spa_type(nfit_spa->spa);
3330 struct nd_cmd_ars_cap ars_cap;
3333 set_bit(ARS_FAILED, &nfit_spa->ars_state);
3334 memset(&ars_cap, 0, sizeof(ars_cap));
3335 rc = ars_get_cap(acpi_desc, &ars_cap, nfit_spa);
3338 /* check that the supported scrub types match the spa type */
3339 if (type == NFIT_SPA_VOLATILE && ((ars_cap.status >> 16)
3340 & ND_ARS_VOLATILE) == 0)
3342 if (type == NFIT_SPA_PM && ((ars_cap.status >> 16)
3343 & ND_ARS_PERSISTENT) == 0)
3346 nfit_spa->max_ars = ars_cap.max_ars_out;
3347 nfit_spa->clear_err_unit = ars_cap.clear_err_unit;
3348 acpi_desc->max_ars = max(nfit_spa->max_ars, acpi_desc->max_ars);
3349 clear_bit(ARS_FAILED, &nfit_spa->ars_state);
3352 static int acpi_nfit_register_regions(struct acpi_nfit_desc *acpi_desc)
3354 struct nfit_spa *nfit_spa;
3355 int rc, do_sched_ars = 0;
3357 set_bit(ARS_VALID, &acpi_desc->scrub_flags);
3358 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3359 switch (nfit_spa_type(nfit_spa->spa)) {
3360 case NFIT_SPA_VOLATILE:
3362 acpi_nfit_init_ars(acpi_desc, nfit_spa);
3367 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3368 switch (nfit_spa_type(nfit_spa->spa)) {
3369 case NFIT_SPA_VOLATILE:
3371 /* register regions and kick off initial ARS run */
3372 rc = ars_register(acpi_desc, nfit_spa);
3377 * Kick off background ARS if at least one
3378 * region successfully registered ARS
3380 if (!test_bit(ARS_FAILED, &nfit_spa->ars_state))
3384 /* nothing to register */
3387 case NFIT_SPA_VDISK:
3389 case NFIT_SPA_PDISK:
3391 /* register known regions that don't support ARS */
3392 rc = acpi_nfit_register_region(acpi_desc, nfit_spa);
3397 /* don't register unknown regions */
3403 sched_ars(acpi_desc);
3407 static int acpi_nfit_check_deletions(struct acpi_nfit_desc *acpi_desc,
3408 struct nfit_table_prev *prev)
3410 struct device *dev = acpi_desc->dev;
3412 if (!list_empty(&prev->spas) ||
3413 !list_empty(&prev->memdevs) ||
3414 !list_empty(&prev->dcrs) ||
3415 !list_empty(&prev->bdws) ||
3416 !list_empty(&prev->idts) ||
3417 !list_empty(&prev->flushes)) {
3418 dev_err(dev, "new nfit deletes entries (unsupported)\n");
3424 static int acpi_nfit_desc_init_scrub_attr(struct acpi_nfit_desc *acpi_desc)
3426 struct device *dev = acpi_desc->dev;
3427 struct kernfs_node *nfit;
3428 struct device *bus_dev;
3430 if (!ars_supported(acpi_desc->nvdimm_bus))
3433 bus_dev = to_nvdimm_bus_dev(acpi_desc->nvdimm_bus);
3434 nfit = sysfs_get_dirent(bus_dev->kobj.sd, "nfit");
3436 dev_err(dev, "sysfs_get_dirent 'nfit' failed\n");
3439 acpi_desc->scrub_count_state = sysfs_get_dirent(nfit, "scrub");
3441 if (!acpi_desc->scrub_count_state) {
3442 dev_err(dev, "sysfs_get_dirent 'scrub' failed\n");
3449 static void acpi_nfit_unregister(void *data)
3451 struct acpi_nfit_desc *acpi_desc = data;
3453 nvdimm_bus_unregister(acpi_desc->nvdimm_bus);
3456 int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *data, acpi_size sz)
3458 struct device *dev = acpi_desc->dev;
3459 struct nfit_table_prev prev;
3463 if (!acpi_desc->nvdimm_bus) {
3464 acpi_nfit_init_dsms(acpi_desc);
3466 acpi_desc->nvdimm_bus = nvdimm_bus_register(dev,
3467 &acpi_desc->nd_desc);
3468 if (!acpi_desc->nvdimm_bus)
3471 rc = devm_add_action_or_reset(dev, acpi_nfit_unregister,
3476 rc = acpi_nfit_desc_init_scrub_attr(acpi_desc);
3480 /* register this acpi_desc for mce notifications */
3481 mutex_lock(&acpi_desc_lock);
3482 list_add_tail(&acpi_desc->list, &acpi_descs);
3483 mutex_unlock(&acpi_desc_lock);
3486 mutex_lock(&acpi_desc->init_mutex);
3488 INIT_LIST_HEAD(&prev.spas);
3489 INIT_LIST_HEAD(&prev.memdevs);
3490 INIT_LIST_HEAD(&prev.dcrs);
3491 INIT_LIST_HEAD(&prev.bdws);
3492 INIT_LIST_HEAD(&prev.idts);
3493 INIT_LIST_HEAD(&prev.flushes);
3495 list_cut_position(&prev.spas, &acpi_desc->spas,
3496 acpi_desc->spas.prev);
3497 list_cut_position(&prev.memdevs, &acpi_desc->memdevs,
3498 acpi_desc->memdevs.prev);
3499 list_cut_position(&prev.dcrs, &acpi_desc->dcrs,
3500 acpi_desc->dcrs.prev);
3501 list_cut_position(&prev.bdws, &acpi_desc->bdws,
3502 acpi_desc->bdws.prev);
3503 list_cut_position(&prev.idts, &acpi_desc->idts,
3504 acpi_desc->idts.prev);
3505 list_cut_position(&prev.flushes, &acpi_desc->flushes,
3506 acpi_desc->flushes.prev);
3509 while (!IS_ERR_OR_NULL(data))
3510 data = add_table(acpi_desc, &prev, data, end);
3513 dev_dbg(dev, "nfit table parsing error: %ld\n", PTR_ERR(data));
3518 rc = acpi_nfit_check_deletions(acpi_desc, &prev);
3522 rc = nfit_mem_init(acpi_desc);
3526 rc = acpi_nfit_register_dimms(acpi_desc);
3530 rc = acpi_nfit_register_regions(acpi_desc);
3533 mutex_unlock(&acpi_desc->init_mutex);
3536 EXPORT_SYMBOL_GPL(acpi_nfit_init);
3538 static int acpi_nfit_flush_probe(struct nvdimm_bus_descriptor *nd_desc)
3540 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
3541 struct device *dev = acpi_desc->dev;
3543 /* Bounce the device lock to flush acpi_nfit_add / acpi_nfit_notify */
3544 nfit_device_lock(dev);
3545 nfit_device_unlock(dev);
3547 /* Bounce the init_mutex to complete initial registration */
3548 mutex_lock(&acpi_desc->init_mutex);
3549 mutex_unlock(&acpi_desc->init_mutex);
3554 static int __acpi_nfit_clear_to_send(struct nvdimm_bus_descriptor *nd_desc,
3555 struct nvdimm *nvdimm, unsigned int cmd)
3557 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
3561 if (cmd != ND_CMD_ARS_START)
3565 * The kernel and userspace may race to initiate a scrub, but
3566 * the scrub thread is prepared to lose that initial race. It
3567 * just needs guarantees that any ARS it initiates are not
3568 * interrupted by any intervening start requests from userspace.
3570 if (work_busy(&acpi_desc->dwork.work))
3577 * Prevent security and firmware activate commands from being issued via
3580 static int acpi_nfit_clear_to_send(struct nvdimm_bus_descriptor *nd_desc,
3581 struct nvdimm *nvdimm, unsigned int cmd, void *buf)
3583 struct nd_cmd_pkg *call_pkg = buf;
3586 if (nvdimm && cmd == ND_CMD_CALL &&
3587 call_pkg->nd_family == NVDIMM_FAMILY_INTEL) {
3588 func = call_pkg->nd_command;
3589 if (func > NVDIMM_CMD_MAX ||
3590 (1 << func) & NVDIMM_INTEL_DENY_CMDMASK)
3594 /* block all non-nfit bus commands */
3595 if (!nvdimm && cmd == ND_CMD_CALL &&
3596 call_pkg->nd_family != NVDIMM_BUS_FAMILY_NFIT)
3599 return __acpi_nfit_clear_to_send(nd_desc, nvdimm, cmd);
3602 int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc,
3603 enum nfit_ars_state req_type)
3605 struct device *dev = acpi_desc->dev;
3606 int scheduled = 0, busy = 0;
3607 struct nfit_spa *nfit_spa;
3609 mutex_lock(&acpi_desc->init_mutex);
3610 if (test_bit(ARS_CANCEL, &acpi_desc->scrub_flags)) {
3611 mutex_unlock(&acpi_desc->init_mutex);
3615 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3616 int type = nfit_spa_type(nfit_spa->spa);
3618 if (type != NFIT_SPA_PM && type != NFIT_SPA_VOLATILE)
3620 if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
3623 if (test_and_set_bit(req_type, &nfit_spa->ars_state))
3629 sched_ars(acpi_desc);
3630 dev_dbg(dev, "ars_scan triggered\n");
3632 mutex_unlock(&acpi_desc->init_mutex);
3641 void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev)
3643 struct nvdimm_bus_descriptor *nd_desc;
3645 dev_set_drvdata(dev, acpi_desc);
3646 acpi_desc->dev = dev;
3647 acpi_desc->blk_do_io = acpi_nfit_blk_region_do_io;
3648 nd_desc = &acpi_desc->nd_desc;
3649 nd_desc->provider_name = "ACPI.NFIT";
3650 nd_desc->module = THIS_MODULE;
3651 nd_desc->ndctl = acpi_nfit_ctl;
3652 nd_desc->flush_probe = acpi_nfit_flush_probe;
3653 nd_desc->clear_to_send = acpi_nfit_clear_to_send;
3654 nd_desc->attr_groups = acpi_nfit_attribute_groups;
3656 INIT_LIST_HEAD(&acpi_desc->spas);
3657 INIT_LIST_HEAD(&acpi_desc->dcrs);
3658 INIT_LIST_HEAD(&acpi_desc->bdws);
3659 INIT_LIST_HEAD(&acpi_desc->idts);
3660 INIT_LIST_HEAD(&acpi_desc->flushes);
3661 INIT_LIST_HEAD(&acpi_desc->memdevs);
3662 INIT_LIST_HEAD(&acpi_desc->dimms);
3663 INIT_LIST_HEAD(&acpi_desc->list);
3664 mutex_init(&acpi_desc->init_mutex);
3665 acpi_desc->scrub_tmo = 1;
3666 INIT_DELAYED_WORK(&acpi_desc->dwork, acpi_nfit_scrub);
3668 EXPORT_SYMBOL_GPL(acpi_nfit_desc_init);
3670 static void acpi_nfit_put_table(void *table)
3672 acpi_put_table(table);
3675 void acpi_nfit_shutdown(void *data)
3677 struct acpi_nfit_desc *acpi_desc = data;
3678 struct device *bus_dev = to_nvdimm_bus_dev(acpi_desc->nvdimm_bus);
3681 * Destruct under acpi_desc_lock so that nfit_handle_mce does not
3684 mutex_lock(&acpi_desc_lock);
3685 list_del(&acpi_desc->list);
3686 mutex_unlock(&acpi_desc_lock);
3688 mutex_lock(&acpi_desc->init_mutex);
3689 set_bit(ARS_CANCEL, &acpi_desc->scrub_flags);
3690 mutex_unlock(&acpi_desc->init_mutex);
3691 cancel_delayed_work_sync(&acpi_desc->dwork);
3694 * Bounce the nvdimm bus lock to make sure any in-flight
3695 * acpi_nfit_ars_rescan() submissions have had a chance to
3696 * either submit or see ->cancel set.
3698 nfit_device_lock(bus_dev);
3699 nfit_device_unlock(bus_dev);
3701 flush_workqueue(nfit_wq);
3703 EXPORT_SYMBOL_GPL(acpi_nfit_shutdown);
3705 static int acpi_nfit_add(struct acpi_device *adev)
3707 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
3708 struct acpi_nfit_desc *acpi_desc;
3709 struct device *dev = &adev->dev;
3710 struct acpi_table_header *tbl;
3711 acpi_status status = AE_OK;
3715 status = acpi_get_table(ACPI_SIG_NFIT, 0, &tbl);
3716 if (ACPI_FAILURE(status)) {
3717 /* The NVDIMM root device allows OS to trigger enumeration of
3718 * NVDIMMs through NFIT at boot time and re-enumeration at
3719 * root level via the _FIT method during runtime.
3720 * This is ok to return 0 here, we could have an nvdimm
3721 * hotplugged later and evaluate _FIT method which returns
3722 * data in the format of a series of NFIT Structures.
3724 dev_dbg(dev, "failed to find NFIT at startup\n");
3728 rc = devm_add_action_or_reset(dev, acpi_nfit_put_table, tbl);
3733 acpi_desc = devm_kzalloc(dev, sizeof(*acpi_desc), GFP_KERNEL);
3736 acpi_nfit_desc_init(acpi_desc, &adev->dev);
3738 /* Save the acpi header for exporting the revision via sysfs */
3739 acpi_desc->acpi_header = *tbl;
3741 /* Evaluate _FIT and override with that if present */
3742 status = acpi_evaluate_object(adev->handle, "_FIT", NULL, &buf);
3743 if (ACPI_SUCCESS(status) && buf.length > 0) {
3744 union acpi_object *obj = buf.pointer;
3746 if (obj->type == ACPI_TYPE_BUFFER)
3747 rc = acpi_nfit_init(acpi_desc, obj->buffer.pointer,
3748 obj->buffer.length);
3750 dev_dbg(dev, "invalid type %d, ignoring _FIT\n",
3754 /* skip over the lead-in header table */
3755 rc = acpi_nfit_init(acpi_desc, (void *) tbl
3756 + sizeof(struct acpi_table_nfit),
3757 sz - sizeof(struct acpi_table_nfit));
3761 return devm_add_action_or_reset(dev, acpi_nfit_shutdown, acpi_desc);
3764 static int acpi_nfit_remove(struct acpi_device *adev)
3766 /* see acpi_nfit_unregister */
3770 static void acpi_nfit_update_notify(struct device *dev, acpi_handle handle)
3772 struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(dev);
3773 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
3774 union acpi_object *obj;
3779 /* dev->driver may be null if we're being removed */
3780 dev_dbg(dev, "no driver found for dev\n");
3785 acpi_desc = devm_kzalloc(dev, sizeof(*acpi_desc), GFP_KERNEL);
3788 acpi_nfit_desc_init(acpi_desc, dev);
3791 * Finish previous registration before considering new
3794 flush_workqueue(nfit_wq);
3798 status = acpi_evaluate_object(handle, "_FIT", NULL, &buf);
3799 if (ACPI_FAILURE(status)) {
3800 dev_err(dev, "failed to evaluate _FIT\n");
3805 if (obj->type == ACPI_TYPE_BUFFER) {
3806 ret = acpi_nfit_init(acpi_desc, obj->buffer.pointer,
3807 obj->buffer.length);
3809 dev_err(dev, "failed to merge updated NFIT\n");
3811 dev_err(dev, "Invalid _FIT\n");
3815 static void acpi_nfit_uc_error_notify(struct device *dev, acpi_handle handle)
3817 struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(dev);
3819 if (acpi_desc->scrub_mode == HW_ERROR_SCRUB_ON)
3820 acpi_nfit_ars_rescan(acpi_desc, ARS_REQ_LONG);
3822 acpi_nfit_ars_rescan(acpi_desc, ARS_REQ_SHORT);
3825 void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event)
3827 dev_dbg(dev, "event: 0x%x\n", event);
3830 case NFIT_NOTIFY_UPDATE:
3831 return acpi_nfit_update_notify(dev, handle);
3832 case NFIT_NOTIFY_UC_MEMORY_ERROR:
3833 return acpi_nfit_uc_error_notify(dev, handle);
3838 EXPORT_SYMBOL_GPL(__acpi_nfit_notify);
3840 static void acpi_nfit_notify(struct acpi_device *adev, u32 event)
3842 nfit_device_lock(&adev->dev);
3843 __acpi_nfit_notify(&adev->dev, adev->handle, event);
3844 nfit_device_unlock(&adev->dev);
3847 static const struct acpi_device_id acpi_nfit_ids[] = {
3851 MODULE_DEVICE_TABLE(acpi, acpi_nfit_ids);
3853 static struct acpi_driver acpi_nfit_driver = {
3854 .name = KBUILD_MODNAME,
3855 .ids = acpi_nfit_ids,
3857 .add = acpi_nfit_add,
3858 .remove = acpi_nfit_remove,
3859 .notify = acpi_nfit_notify,
3863 static __init int nfit_init(void)
3867 BUILD_BUG_ON(sizeof(struct acpi_table_nfit) != 40);
3868 BUILD_BUG_ON(sizeof(struct acpi_nfit_system_address) != 56);
3869 BUILD_BUG_ON(sizeof(struct acpi_nfit_memory_map) != 48);
3870 BUILD_BUG_ON(sizeof(struct acpi_nfit_interleave) != 20);
3871 BUILD_BUG_ON(sizeof(struct acpi_nfit_smbios) != 9);
3872 BUILD_BUG_ON(sizeof(struct acpi_nfit_control_region) != 80);
3873 BUILD_BUG_ON(sizeof(struct acpi_nfit_data_region) != 40);
3874 BUILD_BUG_ON(sizeof(struct acpi_nfit_capabilities) != 16);
3876 guid_parse(UUID_VOLATILE_MEMORY, &nfit_uuid[NFIT_SPA_VOLATILE]);
3877 guid_parse(UUID_PERSISTENT_MEMORY, &nfit_uuid[NFIT_SPA_PM]);
3878 guid_parse(UUID_CONTROL_REGION, &nfit_uuid[NFIT_SPA_DCR]);
3879 guid_parse(UUID_DATA_REGION, &nfit_uuid[NFIT_SPA_BDW]);
3880 guid_parse(UUID_VOLATILE_VIRTUAL_DISK, &nfit_uuid[NFIT_SPA_VDISK]);
3881 guid_parse(UUID_VOLATILE_VIRTUAL_CD, &nfit_uuid[NFIT_SPA_VCD]);
3882 guid_parse(UUID_PERSISTENT_VIRTUAL_DISK, &nfit_uuid[NFIT_SPA_PDISK]);
3883 guid_parse(UUID_PERSISTENT_VIRTUAL_CD, &nfit_uuid[NFIT_SPA_PCD]);
3884 guid_parse(UUID_NFIT_BUS, &nfit_uuid[NFIT_DEV_BUS]);
3885 guid_parse(UUID_NFIT_DIMM, &nfit_uuid[NFIT_DEV_DIMM]);
3886 guid_parse(UUID_NFIT_DIMM_N_HPE1, &nfit_uuid[NFIT_DEV_DIMM_N_HPE1]);
3887 guid_parse(UUID_NFIT_DIMM_N_HPE2, &nfit_uuid[NFIT_DEV_DIMM_N_HPE2]);
3888 guid_parse(UUID_NFIT_DIMM_N_MSFT, &nfit_uuid[NFIT_DEV_DIMM_N_MSFT]);
3889 guid_parse(UUID_NFIT_DIMM_N_HYPERV, &nfit_uuid[NFIT_DEV_DIMM_N_HYPERV]);
3890 guid_parse(UUID_INTEL_BUS, &nfit_uuid[NFIT_BUS_INTEL]);
3892 nfit_wq = create_singlethread_workqueue("nfit");
3896 nfit_mce_register();
3897 ret = acpi_bus_register_driver(&acpi_nfit_driver);
3899 nfit_mce_unregister();
3900 destroy_workqueue(nfit_wq);
3907 static __exit void nfit_exit(void)
3909 nfit_mce_unregister();
3910 acpi_bus_unregister_driver(&acpi_nfit_driver);
3911 destroy_workqueue(nfit_wq);
3912 WARN_ON(!list_empty(&acpi_descs));
3915 module_init(nfit_init);
3916 module_exit(nfit_exit);
3917 MODULE_LICENSE("GPL v2");
3918 MODULE_AUTHOR("Intel Corporation");