2 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 #include <linux/list_sort.h>
14 #include <linux/libnvdimm.h>
15 #include <linux/module.h>
16 #include <linux/mutex.h>
17 #include <linux/ndctl.h>
18 #include <linux/sysfs.h>
19 #include <linux/delay.h>
20 #include <linux/list.h>
21 #include <linux/acpi.h>
22 #include <linux/sort.h>
25 #include <asm/cacheflush.h>
26 #include <acpi/nfit.h>
32 * For readq() and writeq() on 32-bit builds, the hi-lo, lo-hi order is
35 #include <linux/io-64-nonatomic-hi-lo.h>
37 static bool force_enable_dimms;
38 module_param(force_enable_dimms, bool, S_IRUGO|S_IWUSR);
39 MODULE_PARM_DESC(force_enable_dimms, "Ignore _STA (ACPI DIMM device) status");
41 static bool disable_vendor_specific;
42 module_param(disable_vendor_specific, bool, S_IRUGO);
43 MODULE_PARM_DESC(disable_vendor_specific,
44 "Limit commands to the publicly specified set");
46 static unsigned long override_dsm_mask;
47 module_param(override_dsm_mask, ulong, S_IRUGO);
48 MODULE_PARM_DESC(override_dsm_mask, "Bitmask of allowed NVDIMM DSM functions");
50 static int default_dsm_family = -1;
51 module_param(default_dsm_family, int, S_IRUGO);
52 MODULE_PARM_DESC(default_dsm_family,
53 "Try this DSM type first when identifying NVDIMM family");
55 static bool no_init_ars;
56 module_param(no_init_ars, bool, 0644);
57 MODULE_PARM_DESC(no_init_ars, "Skip ARS run at nfit init time");
59 LIST_HEAD(acpi_descs);
60 DEFINE_MUTEX(acpi_desc_lock);
62 static struct workqueue_struct *nfit_wq;
64 struct nfit_table_prev {
65 struct list_head spas;
66 struct list_head memdevs;
67 struct list_head dcrs;
68 struct list_head bdws;
69 struct list_head idts;
70 struct list_head flushes;
73 static guid_t nfit_uuid[NFIT_UUID_MAX];
75 const guid_t *to_nfit_uuid(enum nfit_uuids id)
77 return &nfit_uuid[id];
79 EXPORT_SYMBOL(to_nfit_uuid);
81 static struct acpi_nfit_desc *to_acpi_nfit_desc(
82 struct nvdimm_bus_descriptor *nd_desc)
84 return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
87 static struct acpi_device *to_acpi_dev(struct acpi_nfit_desc *acpi_desc)
89 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
92 * If provider == 'ACPI.NFIT' we can assume 'dev' is a struct
95 if (!nd_desc->provider_name
96 || strcmp(nd_desc->provider_name, "ACPI.NFIT") != 0)
99 return to_acpi_device(acpi_desc->dev);
102 static int xlat_bus_status(void *buf, unsigned int cmd, u32 status)
104 struct nd_cmd_clear_error *clear_err;
105 struct nd_cmd_ars_status *ars_status;
110 if ((status & 0xffff) == NFIT_ARS_CAP_NONE)
117 /* No supported scan types for this range */
118 flags = ND_ARS_PERSISTENT | ND_ARS_VOLATILE;
119 if ((status >> 16 & flags) == 0)
122 case ND_CMD_ARS_START:
123 /* ARS is in progress */
124 if ((status & 0xffff) == NFIT_ARS_START_BUSY)
131 case ND_CMD_ARS_STATUS:
136 /* Check extended status (Upper two bytes) */
137 if (status == NFIT_ARS_STATUS_DONE)
140 /* ARS is in progress */
141 if (status == NFIT_ARS_STATUS_BUSY)
144 /* No ARS performed for the current boot */
145 if (status == NFIT_ARS_STATUS_NONE)
149 * ARS interrupted, either we overflowed or some other
150 * agent wants the scan to stop. If we didn't overflow
151 * then just continue with the returned results.
153 if (status == NFIT_ARS_STATUS_INTR) {
154 if (ars_status->out_length >= 40 && (ars_status->flags
155 & NFIT_ARS_F_OVERFLOW))
164 case ND_CMD_CLEAR_ERROR:
168 if (!clear_err->cleared)
170 if (clear_err->length > clear_err->cleared)
171 return clear_err->cleared;
177 /* all other non-zero status results in an error */
183 #define ACPI_LABELS_LOCKED 3
185 static int xlat_nvdimm_status(struct nvdimm *nvdimm, void *buf, unsigned int cmd,
188 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
191 case ND_CMD_GET_CONFIG_SIZE:
193 * In the _LSI, _LSR, _LSW case the locked status is
194 * communicated via the read/write commands
196 if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags))
199 if (status >> 16 & ND_CONFIG_LOCKED)
202 case ND_CMD_GET_CONFIG_DATA:
203 if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)
204 && status == ACPI_LABELS_LOCKED)
207 case ND_CMD_SET_CONFIG_DATA:
208 if (test_bit(NFIT_MEM_LSW, &nfit_mem->flags)
209 && status == ACPI_LABELS_LOCKED)
216 /* all other non-zero status results in an error */
222 static int xlat_status(struct nvdimm *nvdimm, void *buf, unsigned int cmd,
226 return xlat_bus_status(buf, cmd, status);
227 return xlat_nvdimm_status(nvdimm, buf, cmd, status);
230 /* convert _LS{I,R} packages to the buffer object acpi_nfit_ctl expects */
231 static union acpi_object *pkg_to_buf(union acpi_object *pkg)
236 union acpi_object *buf = NULL;
238 if (pkg->type != ACPI_TYPE_PACKAGE) {
239 WARN_ONCE(1, "BIOS bug, unexpected element type: %d\n",
244 for (i = 0; i < pkg->package.count; i++) {
245 union acpi_object *obj = &pkg->package.elements[i];
247 if (obj->type == ACPI_TYPE_INTEGER)
249 else if (obj->type == ACPI_TYPE_BUFFER)
250 size += obj->buffer.length;
252 WARN_ONCE(1, "BIOS bug, unexpected element type: %d\n",
258 buf = ACPI_ALLOCATE(sizeof(*buf) + size);
263 buf->type = ACPI_TYPE_BUFFER;
264 buf->buffer.length = size;
265 buf->buffer.pointer = dst;
266 for (i = 0; i < pkg->package.count; i++) {
267 union acpi_object *obj = &pkg->package.elements[i];
269 if (obj->type == ACPI_TYPE_INTEGER) {
270 memcpy(dst, &obj->integer.value, 4);
272 } else if (obj->type == ACPI_TYPE_BUFFER) {
273 memcpy(dst, obj->buffer.pointer, obj->buffer.length);
274 dst += obj->buffer.length;
282 static union acpi_object *int_to_buf(union acpi_object *integer)
284 union acpi_object *buf = ACPI_ALLOCATE(sizeof(*buf) + 4);
290 if (integer->type != ACPI_TYPE_INTEGER) {
291 WARN_ONCE(1, "BIOS bug, unexpected element type: %d\n",
297 buf->type = ACPI_TYPE_BUFFER;
298 buf->buffer.length = 4;
299 buf->buffer.pointer = dst;
300 memcpy(dst, &integer->integer.value, 4);
306 static union acpi_object *acpi_label_write(acpi_handle handle, u32 offset,
310 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
311 struct acpi_object_list input = {
313 .pointer = (union acpi_object []) {
315 .integer.type = ACPI_TYPE_INTEGER,
316 .integer.value = offset,
319 .integer.type = ACPI_TYPE_INTEGER,
320 .integer.value = len,
323 .buffer.type = ACPI_TYPE_BUFFER,
324 .buffer.pointer = data,
325 .buffer.length = len,
330 rc = acpi_evaluate_object(handle, "_LSW", &input, &buf);
331 if (ACPI_FAILURE(rc))
333 return int_to_buf(buf.pointer);
336 static union acpi_object *acpi_label_read(acpi_handle handle, u32 offset,
340 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
341 struct acpi_object_list input = {
343 .pointer = (union acpi_object []) {
345 .integer.type = ACPI_TYPE_INTEGER,
346 .integer.value = offset,
349 .integer.type = ACPI_TYPE_INTEGER,
350 .integer.value = len,
355 rc = acpi_evaluate_object(handle, "_LSR", &input, &buf);
356 if (ACPI_FAILURE(rc))
358 return pkg_to_buf(buf.pointer);
361 static union acpi_object *acpi_label_info(acpi_handle handle)
364 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
366 rc = acpi_evaluate_object(handle, "_LSI", NULL, &buf);
367 if (ACPI_FAILURE(rc))
369 return pkg_to_buf(buf.pointer);
372 static u8 nfit_dsm_revid(unsigned family, unsigned func)
374 static const u8 revid_table[NVDIMM_FAMILY_MAX+1][32] = {
375 [NVDIMM_FAMILY_INTEL] = {
376 [NVDIMM_INTEL_GET_MODES] = 2,
377 [NVDIMM_INTEL_GET_FWINFO] = 2,
378 [NVDIMM_INTEL_START_FWUPDATE] = 2,
379 [NVDIMM_INTEL_SEND_FWUPDATE] = 2,
380 [NVDIMM_INTEL_FINISH_FWUPDATE] = 2,
381 [NVDIMM_INTEL_QUERY_FWUPDATE] = 2,
382 [NVDIMM_INTEL_SET_THRESHOLD] = 2,
383 [NVDIMM_INTEL_INJECT_ERROR] = 2,
384 [NVDIMM_INTEL_GET_SECURITY_STATE] = 2,
385 [NVDIMM_INTEL_SET_PASSPHRASE] = 2,
386 [NVDIMM_INTEL_DISABLE_PASSPHRASE] = 2,
387 [NVDIMM_INTEL_UNLOCK_UNIT] = 2,
388 [NVDIMM_INTEL_FREEZE_LOCK] = 2,
389 [NVDIMM_INTEL_SECURE_ERASE] = 2,
390 [NVDIMM_INTEL_OVERWRITE] = 2,
391 [NVDIMM_INTEL_QUERY_OVERWRITE] = 2,
392 [NVDIMM_INTEL_SET_MASTER_PASSPHRASE] = 2,
393 [NVDIMM_INTEL_MASTER_SECURE_ERASE] = 2,
398 if (family > NVDIMM_FAMILY_MAX)
402 id = revid_table[family][func];
404 return 1; /* default */
408 static bool payload_dumpable(struct nvdimm *nvdimm, unsigned int func)
410 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
412 if (nfit_mem && nfit_mem->family == NVDIMM_FAMILY_INTEL
413 && func >= NVDIMM_INTEL_GET_SECURITY_STATE
414 && func <= NVDIMM_INTEL_MASTER_SECURE_ERASE)
415 return IS_ENABLED(CONFIG_NFIT_SECURITY_DEBUG);
419 int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
420 unsigned int cmd, void *buf, unsigned int buf_len, int *cmd_rc)
422 struct acpi_nfit_desc *acpi_desc = to_acpi_nfit_desc(nd_desc);
423 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
424 union acpi_object in_obj, in_buf, *out_obj;
425 const struct nd_cmd_desc *desc = NULL;
426 struct device *dev = acpi_desc->dev;
427 struct nd_cmd_pkg *call_pkg = NULL;
428 const char *cmd_name, *dimm_name;
429 unsigned long cmd_mask, dsm_mask;
430 u32 offset, fw_status = 0;
439 if (cmd == ND_CMD_CALL) {
441 func = call_pkg->nd_command;
443 for (i = 0; i < ARRAY_SIZE(call_pkg->nd_reserved2); i++)
444 if (call_pkg->nd_reserved2[i])
449 struct acpi_device *adev = nfit_mem->adev;
453 if (call_pkg && nfit_mem->family != call_pkg->nd_family)
456 dimm_name = nvdimm_name(nvdimm);
457 cmd_name = nvdimm_cmd_name(cmd);
458 cmd_mask = nvdimm_cmd_mask(nvdimm);
459 dsm_mask = nfit_mem->dsm_mask;
460 desc = nd_cmd_dimm_desc(cmd);
461 guid = to_nfit_uuid(nfit_mem->family);
462 handle = adev->handle;
464 struct acpi_device *adev = to_acpi_dev(acpi_desc);
466 cmd_name = nvdimm_bus_cmd_name(cmd);
467 cmd_mask = nd_desc->cmd_mask;
469 if (cmd == ND_CMD_CALL)
470 dsm_mask = nd_desc->bus_dsm_mask;
471 desc = nd_cmd_bus_desc(cmd);
472 guid = to_nfit_uuid(NFIT_DEV_BUS);
473 handle = adev->handle;
477 if (!desc || (cmd && (desc->out_num + desc->in_num == 0)))
480 if (!test_bit(cmd, &cmd_mask) || !test_bit(func, &dsm_mask))
483 in_obj.type = ACPI_TYPE_PACKAGE;
484 in_obj.package.count = 1;
485 in_obj.package.elements = &in_buf;
486 in_buf.type = ACPI_TYPE_BUFFER;
487 in_buf.buffer.pointer = buf;
488 in_buf.buffer.length = 0;
490 /* libnvdimm has already validated the input envelope */
491 for (i = 0; i < desc->in_num; i++)
492 in_buf.buffer.length += nd_cmd_in_size(nvdimm, cmd, desc,
496 /* skip over package wrapper */
497 in_buf.buffer.pointer = (void *) &call_pkg->nd_payload;
498 in_buf.buffer.length = call_pkg->nd_size_in;
501 dev_dbg(dev, "%s cmd: %d: func: %d input length: %d\n",
502 dimm_name, cmd, func, in_buf.buffer.length);
503 if (payload_dumpable(nvdimm, func))
504 print_hex_dump_debug("nvdimm in ", DUMP_PREFIX_OFFSET, 4, 4,
505 in_buf.buffer.pointer,
506 min_t(u32, 256, in_buf.buffer.length), true);
508 /* call the BIOS, prefer the named methods over _DSM if available */
509 if (nvdimm && cmd == ND_CMD_GET_CONFIG_SIZE
510 && test_bit(NFIT_MEM_LSR, &nfit_mem->flags))
511 out_obj = acpi_label_info(handle);
512 else if (nvdimm && cmd == ND_CMD_GET_CONFIG_DATA
513 && test_bit(NFIT_MEM_LSR, &nfit_mem->flags)) {
514 struct nd_cmd_get_config_data_hdr *p = buf;
516 out_obj = acpi_label_read(handle, p->in_offset, p->in_length);
517 } else if (nvdimm && cmd == ND_CMD_SET_CONFIG_DATA
518 && test_bit(NFIT_MEM_LSW, &nfit_mem->flags)) {
519 struct nd_cmd_set_config_hdr *p = buf;
521 out_obj = acpi_label_write(handle, p->in_offset, p->in_length,
527 revid = nfit_dsm_revid(nfit_mem->family, func);
530 out_obj = acpi_evaluate_dsm(handle, guid, revid, func, &in_obj);
534 dev_dbg(dev, "%s _DSM failed cmd: %s\n", dimm_name, cmd_name);
539 call_pkg->nd_fw_size = out_obj->buffer.length;
540 memcpy(call_pkg->nd_payload + call_pkg->nd_size_in,
541 out_obj->buffer.pointer,
542 min(call_pkg->nd_fw_size, call_pkg->nd_size_out));
546 * Need to support FW function w/o known size in advance.
547 * Caller can determine required size based upon nd_fw_size.
548 * If we return an error (like elsewhere) then caller wouldn't
549 * be able to rely upon data returned to make calculation.
556 if (out_obj->package.type != ACPI_TYPE_BUFFER) {
557 dev_dbg(dev, "%s unexpected output object type cmd: %s type: %d\n",
558 dimm_name, cmd_name, out_obj->type);
563 dev_dbg(dev, "%s cmd: %s output length: %d\n", dimm_name,
564 cmd_name, out_obj->buffer.length);
565 print_hex_dump_debug(cmd_name, DUMP_PREFIX_OFFSET, 4, 4,
566 out_obj->buffer.pointer,
567 min_t(u32, 128, out_obj->buffer.length), true);
569 for (i = 0, offset = 0; i < desc->out_num; i++) {
570 u32 out_size = nd_cmd_out_size(nvdimm, cmd, desc, i, buf,
571 (u32 *) out_obj->buffer.pointer,
572 out_obj->buffer.length - offset);
574 if (offset + out_size > out_obj->buffer.length) {
575 dev_dbg(dev, "%s output object underflow cmd: %s field: %d\n",
576 dimm_name, cmd_name, i);
580 if (in_buf.buffer.length + offset + out_size > buf_len) {
581 dev_dbg(dev, "%s output overrun cmd: %s field: %d\n",
582 dimm_name, cmd_name, i);
586 memcpy(buf + in_buf.buffer.length + offset,
587 out_obj->buffer.pointer + offset, out_size);
592 * Set fw_status for all the commands with a known format to be
593 * later interpreted by xlat_status().
595 if (i >= 1 && ((!nvdimm && cmd >= ND_CMD_ARS_CAP
596 && cmd <= ND_CMD_CLEAR_ERROR)
597 || (nvdimm && cmd >= ND_CMD_SMART
598 && cmd <= ND_CMD_VENDOR)))
599 fw_status = *(u32 *) out_obj->buffer.pointer;
601 if (offset + in_buf.buffer.length < buf_len) {
604 * status valid, return the number of bytes left
605 * unfilled in the output buffer
607 rc = buf_len - offset - in_buf.buffer.length;
609 *cmd_rc = xlat_status(nvdimm, buf, cmd,
612 dev_err(dev, "%s:%s underrun cmd: %s buf_len: %d out_len: %d\n",
613 __func__, dimm_name, cmd_name, buf_len,
620 *cmd_rc = xlat_status(nvdimm, buf, cmd, fw_status);
628 EXPORT_SYMBOL_GPL(acpi_nfit_ctl);
630 static const char *spa_type_name(u16 type)
632 static const char *to_name[] = {
633 [NFIT_SPA_VOLATILE] = "volatile",
634 [NFIT_SPA_PM] = "pmem",
635 [NFIT_SPA_DCR] = "dimm-control-region",
636 [NFIT_SPA_BDW] = "block-data-window",
637 [NFIT_SPA_VDISK] = "volatile-disk",
638 [NFIT_SPA_VCD] = "volatile-cd",
639 [NFIT_SPA_PDISK] = "persistent-disk",
640 [NFIT_SPA_PCD] = "persistent-cd",
644 if (type > NFIT_SPA_PCD)
647 return to_name[type];
650 int nfit_spa_type(struct acpi_nfit_system_address *spa)
654 for (i = 0; i < NFIT_UUID_MAX; i++)
655 if (guid_equal(to_nfit_uuid(i), (guid_t *)&spa->range_guid))
660 static bool add_spa(struct acpi_nfit_desc *acpi_desc,
661 struct nfit_table_prev *prev,
662 struct acpi_nfit_system_address *spa)
664 struct device *dev = acpi_desc->dev;
665 struct nfit_spa *nfit_spa;
667 if (spa->header.length != sizeof(*spa))
670 list_for_each_entry(nfit_spa, &prev->spas, list) {
671 if (memcmp(nfit_spa->spa, spa, sizeof(*spa)) == 0) {
672 list_move_tail(&nfit_spa->list, &acpi_desc->spas);
677 nfit_spa = devm_kzalloc(dev, sizeof(*nfit_spa) + sizeof(*spa),
681 INIT_LIST_HEAD(&nfit_spa->list);
682 memcpy(nfit_spa->spa, spa, sizeof(*spa));
683 list_add_tail(&nfit_spa->list, &acpi_desc->spas);
684 dev_dbg(dev, "spa index: %d type: %s\n",
686 spa_type_name(nfit_spa_type(spa)));
690 static bool add_memdev(struct acpi_nfit_desc *acpi_desc,
691 struct nfit_table_prev *prev,
692 struct acpi_nfit_memory_map *memdev)
694 struct device *dev = acpi_desc->dev;
695 struct nfit_memdev *nfit_memdev;
697 if (memdev->header.length != sizeof(*memdev))
700 list_for_each_entry(nfit_memdev, &prev->memdevs, list)
701 if (memcmp(nfit_memdev->memdev, memdev, sizeof(*memdev)) == 0) {
702 list_move_tail(&nfit_memdev->list, &acpi_desc->memdevs);
706 nfit_memdev = devm_kzalloc(dev, sizeof(*nfit_memdev) + sizeof(*memdev),
710 INIT_LIST_HEAD(&nfit_memdev->list);
711 memcpy(nfit_memdev->memdev, memdev, sizeof(*memdev));
712 list_add_tail(&nfit_memdev->list, &acpi_desc->memdevs);
713 dev_dbg(dev, "memdev handle: %#x spa: %d dcr: %d flags: %#x\n",
714 memdev->device_handle, memdev->range_index,
715 memdev->region_index, memdev->flags);
719 int nfit_get_smbios_id(u32 device_handle, u16 *flags)
721 struct acpi_nfit_memory_map *memdev;
722 struct acpi_nfit_desc *acpi_desc;
723 struct nfit_mem *nfit_mem;
725 mutex_lock(&acpi_desc_lock);
726 list_for_each_entry(acpi_desc, &acpi_descs, list) {
727 mutex_lock(&acpi_desc->init_mutex);
728 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
729 memdev = __to_nfit_memdev(nfit_mem);
730 if (memdev->device_handle == device_handle) {
731 mutex_unlock(&acpi_desc->init_mutex);
732 mutex_unlock(&acpi_desc_lock);
733 *flags = memdev->flags;
734 return memdev->physical_id;
737 mutex_unlock(&acpi_desc->init_mutex);
739 mutex_unlock(&acpi_desc_lock);
743 EXPORT_SYMBOL_GPL(nfit_get_smbios_id);
746 * An implementation may provide a truncated control region if no block windows
749 static size_t sizeof_dcr(struct acpi_nfit_control_region *dcr)
751 if (dcr->header.length < offsetof(struct acpi_nfit_control_region,
756 return offsetof(struct acpi_nfit_control_region, window_size);
759 static bool add_dcr(struct acpi_nfit_desc *acpi_desc,
760 struct nfit_table_prev *prev,
761 struct acpi_nfit_control_region *dcr)
763 struct device *dev = acpi_desc->dev;
764 struct nfit_dcr *nfit_dcr;
766 if (!sizeof_dcr(dcr))
769 list_for_each_entry(nfit_dcr, &prev->dcrs, list)
770 if (memcmp(nfit_dcr->dcr, dcr, sizeof_dcr(dcr)) == 0) {
771 list_move_tail(&nfit_dcr->list, &acpi_desc->dcrs);
775 nfit_dcr = devm_kzalloc(dev, sizeof(*nfit_dcr) + sizeof(*dcr),
779 INIT_LIST_HEAD(&nfit_dcr->list);
780 memcpy(nfit_dcr->dcr, dcr, sizeof_dcr(dcr));
781 list_add_tail(&nfit_dcr->list, &acpi_desc->dcrs);
782 dev_dbg(dev, "dcr index: %d windows: %d\n",
783 dcr->region_index, dcr->windows);
787 static bool add_bdw(struct acpi_nfit_desc *acpi_desc,
788 struct nfit_table_prev *prev,
789 struct acpi_nfit_data_region *bdw)
791 struct device *dev = acpi_desc->dev;
792 struct nfit_bdw *nfit_bdw;
794 if (bdw->header.length != sizeof(*bdw))
796 list_for_each_entry(nfit_bdw, &prev->bdws, list)
797 if (memcmp(nfit_bdw->bdw, bdw, sizeof(*bdw)) == 0) {
798 list_move_tail(&nfit_bdw->list, &acpi_desc->bdws);
802 nfit_bdw = devm_kzalloc(dev, sizeof(*nfit_bdw) + sizeof(*bdw),
806 INIT_LIST_HEAD(&nfit_bdw->list);
807 memcpy(nfit_bdw->bdw, bdw, sizeof(*bdw));
808 list_add_tail(&nfit_bdw->list, &acpi_desc->bdws);
809 dev_dbg(dev, "bdw dcr: %d windows: %d\n",
810 bdw->region_index, bdw->windows);
814 static size_t sizeof_idt(struct acpi_nfit_interleave *idt)
816 if (idt->header.length < sizeof(*idt))
818 return sizeof(*idt) + sizeof(u32) * (idt->line_count - 1);
821 static bool add_idt(struct acpi_nfit_desc *acpi_desc,
822 struct nfit_table_prev *prev,
823 struct acpi_nfit_interleave *idt)
825 struct device *dev = acpi_desc->dev;
826 struct nfit_idt *nfit_idt;
828 if (!sizeof_idt(idt))
831 list_for_each_entry(nfit_idt, &prev->idts, list) {
832 if (sizeof_idt(nfit_idt->idt) != sizeof_idt(idt))
835 if (memcmp(nfit_idt->idt, idt, sizeof_idt(idt)) == 0) {
836 list_move_tail(&nfit_idt->list, &acpi_desc->idts);
841 nfit_idt = devm_kzalloc(dev, sizeof(*nfit_idt) + sizeof_idt(idt),
845 INIT_LIST_HEAD(&nfit_idt->list);
846 memcpy(nfit_idt->idt, idt, sizeof_idt(idt));
847 list_add_tail(&nfit_idt->list, &acpi_desc->idts);
848 dev_dbg(dev, "idt index: %d num_lines: %d\n",
849 idt->interleave_index, idt->line_count);
853 static size_t sizeof_flush(struct acpi_nfit_flush_address *flush)
855 if (flush->header.length < sizeof(*flush))
857 return sizeof(*flush) + sizeof(u64) * (flush->hint_count - 1);
860 static bool add_flush(struct acpi_nfit_desc *acpi_desc,
861 struct nfit_table_prev *prev,
862 struct acpi_nfit_flush_address *flush)
864 struct device *dev = acpi_desc->dev;
865 struct nfit_flush *nfit_flush;
867 if (!sizeof_flush(flush))
870 list_for_each_entry(nfit_flush, &prev->flushes, list) {
871 if (sizeof_flush(nfit_flush->flush) != sizeof_flush(flush))
874 if (memcmp(nfit_flush->flush, flush,
875 sizeof_flush(flush)) == 0) {
876 list_move_tail(&nfit_flush->list, &acpi_desc->flushes);
881 nfit_flush = devm_kzalloc(dev, sizeof(*nfit_flush)
882 + sizeof_flush(flush), GFP_KERNEL);
885 INIT_LIST_HEAD(&nfit_flush->list);
886 memcpy(nfit_flush->flush, flush, sizeof_flush(flush));
887 list_add_tail(&nfit_flush->list, &acpi_desc->flushes);
888 dev_dbg(dev, "nfit_flush handle: %d hint_count: %d\n",
889 flush->device_handle, flush->hint_count);
893 static bool add_platform_cap(struct acpi_nfit_desc *acpi_desc,
894 struct acpi_nfit_capabilities *pcap)
896 struct device *dev = acpi_desc->dev;
899 mask = (1 << (pcap->highest_capability + 1)) - 1;
900 acpi_desc->platform_cap = pcap->capabilities & mask;
901 dev_dbg(dev, "cap: %#x\n", acpi_desc->platform_cap);
905 static void *add_table(struct acpi_nfit_desc *acpi_desc,
906 struct nfit_table_prev *prev, void *table, const void *end)
908 struct device *dev = acpi_desc->dev;
909 struct acpi_nfit_header *hdr;
910 void *err = ERR_PTR(-ENOMEM);
917 dev_warn(dev, "found a zero length table '%d' parsing nfit\n",
923 case ACPI_NFIT_TYPE_SYSTEM_ADDRESS:
924 if (!add_spa(acpi_desc, prev, table))
927 case ACPI_NFIT_TYPE_MEMORY_MAP:
928 if (!add_memdev(acpi_desc, prev, table))
931 case ACPI_NFIT_TYPE_CONTROL_REGION:
932 if (!add_dcr(acpi_desc, prev, table))
935 case ACPI_NFIT_TYPE_DATA_REGION:
936 if (!add_bdw(acpi_desc, prev, table))
939 case ACPI_NFIT_TYPE_INTERLEAVE:
940 if (!add_idt(acpi_desc, prev, table))
943 case ACPI_NFIT_TYPE_FLUSH_ADDRESS:
944 if (!add_flush(acpi_desc, prev, table))
947 case ACPI_NFIT_TYPE_SMBIOS:
948 dev_dbg(dev, "smbios\n");
950 case ACPI_NFIT_TYPE_CAPABILITIES:
951 if (!add_platform_cap(acpi_desc, table))
955 dev_err(dev, "unknown table '%d' parsing nfit\n", hdr->type);
959 return table + hdr->length;
962 static void nfit_mem_find_spa_bdw(struct acpi_nfit_desc *acpi_desc,
963 struct nfit_mem *nfit_mem)
965 u32 device_handle = __to_nfit_memdev(nfit_mem)->device_handle;
966 u16 dcr = nfit_mem->dcr->region_index;
967 struct nfit_spa *nfit_spa;
969 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
970 u16 range_index = nfit_spa->spa->range_index;
971 int type = nfit_spa_type(nfit_spa->spa);
972 struct nfit_memdev *nfit_memdev;
974 if (type != NFIT_SPA_BDW)
977 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
978 if (nfit_memdev->memdev->range_index != range_index)
980 if (nfit_memdev->memdev->device_handle != device_handle)
982 if (nfit_memdev->memdev->region_index != dcr)
985 nfit_mem->spa_bdw = nfit_spa->spa;
990 dev_dbg(acpi_desc->dev, "SPA-BDW not found for SPA-DCR %d\n",
991 nfit_mem->spa_dcr->range_index);
992 nfit_mem->bdw = NULL;
995 static void nfit_mem_init_bdw(struct acpi_nfit_desc *acpi_desc,
996 struct nfit_mem *nfit_mem, struct acpi_nfit_system_address *spa)
998 u16 dcr = __to_nfit_memdev(nfit_mem)->region_index;
999 struct nfit_memdev *nfit_memdev;
1000 struct nfit_bdw *nfit_bdw;
1001 struct nfit_idt *nfit_idt;
1002 u16 idt_idx, range_index;
1004 list_for_each_entry(nfit_bdw, &acpi_desc->bdws, list) {
1005 if (nfit_bdw->bdw->region_index != dcr)
1007 nfit_mem->bdw = nfit_bdw->bdw;
1014 nfit_mem_find_spa_bdw(acpi_desc, nfit_mem);
1016 if (!nfit_mem->spa_bdw)
1019 range_index = nfit_mem->spa_bdw->range_index;
1020 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
1021 if (nfit_memdev->memdev->range_index != range_index ||
1022 nfit_memdev->memdev->region_index != dcr)
1024 nfit_mem->memdev_bdw = nfit_memdev->memdev;
1025 idt_idx = nfit_memdev->memdev->interleave_index;
1026 list_for_each_entry(nfit_idt, &acpi_desc->idts, list) {
1027 if (nfit_idt->idt->interleave_index != idt_idx)
1029 nfit_mem->idt_bdw = nfit_idt->idt;
1036 static int __nfit_mem_init(struct acpi_nfit_desc *acpi_desc,
1037 struct acpi_nfit_system_address *spa)
1039 struct nfit_mem *nfit_mem, *found;
1040 struct nfit_memdev *nfit_memdev;
1041 int type = spa ? nfit_spa_type(spa) : 0;
1053 * This loop runs in two modes, when a dimm is mapped the loop
1054 * adds memdev associations to an existing dimm, or creates a
1055 * dimm. In the unmapped dimm case this loop sweeps for memdev
1056 * instances with an invalid / zero range_index and adds those
1057 * dimms without spa associations.
1059 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
1060 struct nfit_flush *nfit_flush;
1061 struct nfit_dcr *nfit_dcr;
1065 if (spa && nfit_memdev->memdev->range_index != spa->range_index)
1067 if (!spa && nfit_memdev->memdev->range_index)
1070 dcr = nfit_memdev->memdev->region_index;
1071 device_handle = nfit_memdev->memdev->device_handle;
1072 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list)
1073 if (__to_nfit_memdev(nfit_mem)->device_handle
1082 nfit_mem = devm_kzalloc(acpi_desc->dev,
1083 sizeof(*nfit_mem), GFP_KERNEL);
1086 INIT_LIST_HEAD(&nfit_mem->list);
1087 nfit_mem->acpi_desc = acpi_desc;
1088 list_add(&nfit_mem->list, &acpi_desc->dimms);
1091 list_for_each_entry(nfit_dcr, &acpi_desc->dcrs, list) {
1092 if (nfit_dcr->dcr->region_index != dcr)
1095 * Record the control region for the dimm. For
1096 * the ACPI 6.1 case, where there are separate
1097 * control regions for the pmem vs blk
1098 * interfaces, be sure to record the extended
1102 nfit_mem->dcr = nfit_dcr->dcr;
1103 else if (nfit_mem->dcr->windows == 0
1104 && nfit_dcr->dcr->windows)
1105 nfit_mem->dcr = nfit_dcr->dcr;
1109 list_for_each_entry(nfit_flush, &acpi_desc->flushes, list) {
1110 struct acpi_nfit_flush_address *flush;
1113 if (nfit_flush->flush->device_handle != device_handle)
1115 nfit_mem->nfit_flush = nfit_flush;
1116 flush = nfit_flush->flush;
1117 nfit_mem->flush_wpq = devm_kcalloc(acpi_desc->dev,
1119 sizeof(struct resource),
1121 if (!nfit_mem->flush_wpq)
1123 for (i = 0; i < flush->hint_count; i++) {
1124 struct resource *res = &nfit_mem->flush_wpq[i];
1126 res->start = flush->hint_address[i];
1127 res->end = res->start + 8 - 1;
1132 if (dcr && !nfit_mem->dcr) {
1133 dev_err(acpi_desc->dev, "SPA %d missing DCR %d\n",
1134 spa->range_index, dcr);
1138 if (type == NFIT_SPA_DCR) {
1139 struct nfit_idt *nfit_idt;
1142 /* multiple dimms may share a SPA when interleaved */
1143 nfit_mem->spa_dcr = spa;
1144 nfit_mem->memdev_dcr = nfit_memdev->memdev;
1145 idt_idx = nfit_memdev->memdev->interleave_index;
1146 list_for_each_entry(nfit_idt, &acpi_desc->idts, list) {
1147 if (nfit_idt->idt->interleave_index != idt_idx)
1149 nfit_mem->idt_dcr = nfit_idt->idt;
1152 nfit_mem_init_bdw(acpi_desc, nfit_mem, spa);
1153 } else if (type == NFIT_SPA_PM) {
1155 * A single dimm may belong to multiple SPA-PM
1156 * ranges, record at least one in addition to
1157 * any SPA-DCR range.
1159 nfit_mem->memdev_pmem = nfit_memdev->memdev;
1161 nfit_mem->memdev_dcr = nfit_memdev->memdev;
1167 static int nfit_mem_cmp(void *priv, struct list_head *_a, struct list_head *_b)
1169 struct nfit_mem *a = container_of(_a, typeof(*a), list);
1170 struct nfit_mem *b = container_of(_b, typeof(*b), list);
1171 u32 handleA, handleB;
1173 handleA = __to_nfit_memdev(a)->device_handle;
1174 handleB = __to_nfit_memdev(b)->device_handle;
1175 if (handleA < handleB)
1177 else if (handleA > handleB)
1182 static int nfit_mem_init(struct acpi_nfit_desc *acpi_desc)
1184 struct nfit_spa *nfit_spa;
1189 * For each SPA-DCR or SPA-PMEM address range find its
1190 * corresponding MEMDEV(s). From each MEMDEV find the
1191 * corresponding DCR. Then, if we're operating on a SPA-DCR,
1192 * try to find a SPA-BDW and a corresponding BDW that references
1193 * the DCR. Throw it all into an nfit_mem object. Note, that
1194 * BDWs are optional.
1196 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
1197 rc = __nfit_mem_init(acpi_desc, nfit_spa->spa);
1203 * If a DIMM has failed to be mapped into SPA there will be no
1204 * SPA entries above. Find and register all the unmapped DIMMs
1205 * for reporting and recovery purposes.
1207 rc = __nfit_mem_init(acpi_desc, NULL);
1211 list_sort(NULL, &acpi_desc->dimms, nfit_mem_cmp);
1216 static ssize_t bus_dsm_mask_show(struct device *dev,
1217 struct device_attribute *attr, char *buf)
1219 struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
1220 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
1222 return sprintf(buf, "%#lx\n", nd_desc->bus_dsm_mask);
1224 static struct device_attribute dev_attr_bus_dsm_mask =
1225 __ATTR(dsm_mask, 0444, bus_dsm_mask_show, NULL);
1227 static ssize_t revision_show(struct device *dev,
1228 struct device_attribute *attr, char *buf)
1230 struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
1231 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
1232 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1234 return sprintf(buf, "%d\n", acpi_desc->acpi_header.revision);
1236 static DEVICE_ATTR_RO(revision);
1238 static ssize_t hw_error_scrub_show(struct device *dev,
1239 struct device_attribute *attr, char *buf)
1241 struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
1242 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
1243 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1245 return sprintf(buf, "%d\n", acpi_desc->scrub_mode);
1249 * The 'hw_error_scrub' attribute can have the following values written to it:
1250 * '0': Switch to the default mode where an exception will only insert
1251 * the address of the memory error into the poison and badblocks lists.
1252 * '1': Enable a full scrub to happen if an exception for a memory error is
1255 static ssize_t hw_error_scrub_store(struct device *dev,
1256 struct device_attribute *attr, const char *buf, size_t size)
1258 struct nvdimm_bus_descriptor *nd_desc;
1262 rc = kstrtol(buf, 0, &val);
1267 nd_desc = dev_get_drvdata(dev);
1269 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1272 case HW_ERROR_SCRUB_ON:
1273 acpi_desc->scrub_mode = HW_ERROR_SCRUB_ON;
1275 case HW_ERROR_SCRUB_OFF:
1276 acpi_desc->scrub_mode = HW_ERROR_SCRUB_OFF;
1288 static DEVICE_ATTR_RW(hw_error_scrub);
1291 * This shows the number of full Address Range Scrubs that have been
1292 * completed since driver load time. Userspace can wait on this using
1293 * select/poll etc. A '+' at the end indicates an ARS is in progress
1295 static ssize_t scrub_show(struct device *dev,
1296 struct device_attribute *attr, char *buf)
1298 struct nvdimm_bus_descriptor *nd_desc;
1299 ssize_t rc = -ENXIO;
1302 nd_desc = dev_get_drvdata(dev);
1304 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1306 mutex_lock(&acpi_desc->init_mutex);
1307 rc = sprintf(buf, "%d%s", acpi_desc->scrub_count,
1308 acpi_desc->scrub_busy
1309 && !acpi_desc->cancel ? "+\n" : "\n");
1310 mutex_unlock(&acpi_desc->init_mutex);
1316 static ssize_t scrub_store(struct device *dev,
1317 struct device_attribute *attr, const char *buf, size_t size)
1319 struct nvdimm_bus_descriptor *nd_desc;
1323 rc = kstrtol(buf, 0, &val);
1330 nd_desc = dev_get_drvdata(dev);
1332 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1334 rc = acpi_nfit_ars_rescan(acpi_desc, ARS_REQ_LONG);
1341 static DEVICE_ATTR_RW(scrub);
1343 static bool ars_supported(struct nvdimm_bus *nvdimm_bus)
1345 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
1346 const unsigned long mask = 1 << ND_CMD_ARS_CAP | 1 << ND_CMD_ARS_START
1347 | 1 << ND_CMD_ARS_STATUS;
1349 return (nd_desc->cmd_mask & mask) == mask;
1352 static umode_t nfit_visible(struct kobject *kobj, struct attribute *a, int n)
1354 struct device *dev = container_of(kobj, struct device, kobj);
1355 struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
1357 if (a == &dev_attr_scrub.attr && !ars_supported(nvdimm_bus))
1362 static struct attribute *acpi_nfit_attributes[] = {
1363 &dev_attr_revision.attr,
1364 &dev_attr_scrub.attr,
1365 &dev_attr_hw_error_scrub.attr,
1366 &dev_attr_bus_dsm_mask.attr,
1370 static const struct attribute_group acpi_nfit_attribute_group = {
1372 .attrs = acpi_nfit_attributes,
1373 .is_visible = nfit_visible,
1376 static const struct attribute_group *acpi_nfit_attribute_groups[] = {
1377 &nvdimm_bus_attribute_group,
1378 &acpi_nfit_attribute_group,
1382 static struct acpi_nfit_memory_map *to_nfit_memdev(struct device *dev)
1384 struct nvdimm *nvdimm = to_nvdimm(dev);
1385 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1387 return __to_nfit_memdev(nfit_mem);
1390 static struct acpi_nfit_control_region *to_nfit_dcr(struct device *dev)
1392 struct nvdimm *nvdimm = to_nvdimm(dev);
1393 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1395 return nfit_mem->dcr;
1398 static ssize_t handle_show(struct device *dev,
1399 struct device_attribute *attr, char *buf)
1401 struct acpi_nfit_memory_map *memdev = to_nfit_memdev(dev);
1403 return sprintf(buf, "%#x\n", memdev->device_handle);
1405 static DEVICE_ATTR_RO(handle);
1407 static ssize_t phys_id_show(struct device *dev,
1408 struct device_attribute *attr, char *buf)
1410 struct acpi_nfit_memory_map *memdev = to_nfit_memdev(dev);
1412 return sprintf(buf, "%#x\n", memdev->physical_id);
1414 static DEVICE_ATTR_RO(phys_id);
1416 static ssize_t vendor_show(struct device *dev,
1417 struct device_attribute *attr, char *buf)
1419 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1421 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->vendor_id));
1423 static DEVICE_ATTR_RO(vendor);
1425 static ssize_t rev_id_show(struct device *dev,
1426 struct device_attribute *attr, char *buf)
1428 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1430 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->revision_id));
1432 static DEVICE_ATTR_RO(rev_id);
1434 static ssize_t device_show(struct device *dev,
1435 struct device_attribute *attr, char *buf)
1437 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1439 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->device_id));
1441 static DEVICE_ATTR_RO(device);
1443 static ssize_t subsystem_vendor_show(struct device *dev,
1444 struct device_attribute *attr, char *buf)
1446 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1448 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->subsystem_vendor_id));
1450 static DEVICE_ATTR_RO(subsystem_vendor);
1452 static ssize_t subsystem_rev_id_show(struct device *dev,
1453 struct device_attribute *attr, char *buf)
1455 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1457 return sprintf(buf, "0x%04x\n",
1458 be16_to_cpu(dcr->subsystem_revision_id));
1460 static DEVICE_ATTR_RO(subsystem_rev_id);
1462 static ssize_t subsystem_device_show(struct device *dev,
1463 struct device_attribute *attr, char *buf)
1465 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1467 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->subsystem_device_id));
1469 static DEVICE_ATTR_RO(subsystem_device);
1471 static int num_nvdimm_formats(struct nvdimm *nvdimm)
1473 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1476 if (nfit_mem->memdev_pmem)
1478 if (nfit_mem->memdev_bdw)
1483 static ssize_t format_show(struct device *dev,
1484 struct device_attribute *attr, char *buf)
1486 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1488 return sprintf(buf, "0x%04x\n", le16_to_cpu(dcr->code));
1490 static DEVICE_ATTR_RO(format);
1492 static ssize_t format1_show(struct device *dev,
1493 struct device_attribute *attr, char *buf)
1496 ssize_t rc = -ENXIO;
1497 struct nfit_mem *nfit_mem;
1498 struct nfit_memdev *nfit_memdev;
1499 struct acpi_nfit_desc *acpi_desc;
1500 struct nvdimm *nvdimm = to_nvdimm(dev);
1501 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1503 nfit_mem = nvdimm_provider_data(nvdimm);
1504 acpi_desc = nfit_mem->acpi_desc;
1505 handle = to_nfit_memdev(dev)->device_handle;
1507 /* assumes DIMMs have at most 2 published interface codes */
1508 mutex_lock(&acpi_desc->init_mutex);
1509 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
1510 struct acpi_nfit_memory_map *memdev = nfit_memdev->memdev;
1511 struct nfit_dcr *nfit_dcr;
1513 if (memdev->device_handle != handle)
1516 list_for_each_entry(nfit_dcr, &acpi_desc->dcrs, list) {
1517 if (nfit_dcr->dcr->region_index != memdev->region_index)
1519 if (nfit_dcr->dcr->code == dcr->code)
1521 rc = sprintf(buf, "0x%04x\n",
1522 le16_to_cpu(nfit_dcr->dcr->code));
1528 mutex_unlock(&acpi_desc->init_mutex);
1531 static DEVICE_ATTR_RO(format1);
1533 static ssize_t formats_show(struct device *dev,
1534 struct device_attribute *attr, char *buf)
1536 struct nvdimm *nvdimm = to_nvdimm(dev);
1538 return sprintf(buf, "%d\n", num_nvdimm_formats(nvdimm));
1540 static DEVICE_ATTR_RO(formats);
1542 static ssize_t serial_show(struct device *dev,
1543 struct device_attribute *attr, char *buf)
1545 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1547 return sprintf(buf, "0x%08x\n", be32_to_cpu(dcr->serial_number));
1549 static DEVICE_ATTR_RO(serial);
1551 static ssize_t family_show(struct device *dev,
1552 struct device_attribute *attr, char *buf)
1554 struct nvdimm *nvdimm = to_nvdimm(dev);
1555 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1557 if (nfit_mem->family < 0)
1559 return sprintf(buf, "%d\n", nfit_mem->family);
1561 static DEVICE_ATTR_RO(family);
1563 static ssize_t dsm_mask_show(struct device *dev,
1564 struct device_attribute *attr, char *buf)
1566 struct nvdimm *nvdimm = to_nvdimm(dev);
1567 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1569 if (nfit_mem->family < 0)
1571 return sprintf(buf, "%#lx\n", nfit_mem->dsm_mask);
1573 static DEVICE_ATTR_RO(dsm_mask);
1575 static ssize_t flags_show(struct device *dev,
1576 struct device_attribute *attr, char *buf)
1578 struct nvdimm *nvdimm = to_nvdimm(dev);
1579 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1580 u16 flags = __to_nfit_memdev(nfit_mem)->flags;
1582 if (test_bit(NFIT_MEM_DIRTY, &nfit_mem->flags))
1583 flags |= ACPI_NFIT_MEM_FLUSH_FAILED;
1585 return sprintf(buf, "%s%s%s%s%s%s%s\n",
1586 flags & ACPI_NFIT_MEM_SAVE_FAILED ? "save_fail " : "",
1587 flags & ACPI_NFIT_MEM_RESTORE_FAILED ? "restore_fail " : "",
1588 flags & ACPI_NFIT_MEM_FLUSH_FAILED ? "flush_fail " : "",
1589 flags & ACPI_NFIT_MEM_NOT_ARMED ? "not_armed " : "",
1590 flags & ACPI_NFIT_MEM_HEALTH_OBSERVED ? "smart_event " : "",
1591 flags & ACPI_NFIT_MEM_MAP_FAILED ? "map_fail " : "",
1592 flags & ACPI_NFIT_MEM_HEALTH_ENABLED ? "smart_notify " : "");
1594 static DEVICE_ATTR_RO(flags);
1596 static ssize_t id_show(struct device *dev,
1597 struct device_attribute *attr, char *buf)
1599 struct nvdimm *nvdimm = to_nvdimm(dev);
1600 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1602 return sprintf(buf, "%s\n", nfit_mem->id);
1604 static DEVICE_ATTR_RO(id);
1606 static ssize_t dirty_shutdown_show(struct device *dev,
1607 struct device_attribute *attr, char *buf)
1609 struct nvdimm *nvdimm = to_nvdimm(dev);
1610 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1612 return sprintf(buf, "%d\n", nfit_mem->dirty_shutdown);
1614 static DEVICE_ATTR_RO(dirty_shutdown);
1616 static struct attribute *acpi_nfit_dimm_attributes[] = {
1617 &dev_attr_handle.attr,
1618 &dev_attr_phys_id.attr,
1619 &dev_attr_vendor.attr,
1620 &dev_attr_device.attr,
1621 &dev_attr_rev_id.attr,
1622 &dev_attr_subsystem_vendor.attr,
1623 &dev_attr_subsystem_device.attr,
1624 &dev_attr_subsystem_rev_id.attr,
1625 &dev_attr_format.attr,
1626 &dev_attr_formats.attr,
1627 &dev_attr_format1.attr,
1628 &dev_attr_serial.attr,
1629 &dev_attr_flags.attr,
1631 &dev_attr_family.attr,
1632 &dev_attr_dsm_mask.attr,
1633 &dev_attr_dirty_shutdown.attr,
1637 static umode_t acpi_nfit_dimm_attr_visible(struct kobject *kobj,
1638 struct attribute *a, int n)
1640 struct device *dev = container_of(kobj, struct device, kobj);
1641 struct nvdimm *nvdimm = to_nvdimm(dev);
1642 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1644 if (!to_nfit_dcr(dev)) {
1645 /* Without a dcr only the memdev attributes can be surfaced */
1646 if (a == &dev_attr_handle.attr || a == &dev_attr_phys_id.attr
1647 || a == &dev_attr_flags.attr
1648 || a == &dev_attr_family.attr
1649 || a == &dev_attr_dsm_mask.attr)
1654 if (a == &dev_attr_format1.attr && num_nvdimm_formats(nvdimm) <= 1)
1657 if (!test_bit(NFIT_MEM_DIRTY_COUNT, &nfit_mem->flags)
1658 && a == &dev_attr_dirty_shutdown.attr)
1664 static const struct attribute_group acpi_nfit_dimm_attribute_group = {
1666 .attrs = acpi_nfit_dimm_attributes,
1667 .is_visible = acpi_nfit_dimm_attr_visible,
1670 static const struct attribute_group *acpi_nfit_dimm_attribute_groups[] = {
1671 &nvdimm_attribute_group,
1672 &nd_device_attribute_group,
1673 &acpi_nfit_dimm_attribute_group,
1677 static struct nvdimm *acpi_nfit_dimm_by_handle(struct acpi_nfit_desc *acpi_desc,
1680 struct nfit_mem *nfit_mem;
1682 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list)
1683 if (__to_nfit_memdev(nfit_mem)->device_handle == device_handle)
1684 return nfit_mem->nvdimm;
1689 void __acpi_nvdimm_notify(struct device *dev, u32 event)
1691 struct nfit_mem *nfit_mem;
1692 struct acpi_nfit_desc *acpi_desc;
1694 dev_dbg(dev->parent, "%s: event: %d\n", dev_name(dev),
1697 if (event != NFIT_NOTIFY_DIMM_HEALTH) {
1698 dev_dbg(dev->parent, "%s: unknown event: %d\n", dev_name(dev),
1703 acpi_desc = dev_get_drvdata(dev->parent);
1708 * If we successfully retrieved acpi_desc, then we know nfit_mem data
1711 nfit_mem = dev_get_drvdata(dev);
1712 if (nfit_mem && nfit_mem->flags_attr)
1713 sysfs_notify_dirent(nfit_mem->flags_attr);
1715 EXPORT_SYMBOL_GPL(__acpi_nvdimm_notify);
1717 static void acpi_nvdimm_notify(acpi_handle handle, u32 event, void *data)
1719 struct acpi_device *adev = data;
1720 struct device *dev = &adev->dev;
1722 device_lock(dev->parent);
1723 __acpi_nvdimm_notify(dev, event);
1724 device_unlock(dev->parent);
1727 static bool acpi_nvdimm_has_method(struct acpi_device *adev, char *method)
1732 status = acpi_get_handle(adev->handle, method, &handle);
1734 if (ACPI_SUCCESS(status))
1739 __weak void nfit_intel_shutdown_status(struct nfit_mem *nfit_mem)
1741 struct nd_intel_smart smart = { 0 };
1742 union acpi_object in_buf = {
1743 .type = ACPI_TYPE_BUFFER,
1744 .buffer.pointer = (char *) &smart,
1745 .buffer.length = sizeof(smart),
1747 union acpi_object in_obj = {
1748 .type = ACPI_TYPE_PACKAGE,
1750 .package.elements = &in_buf,
1752 const u8 func = ND_INTEL_SMART;
1753 const guid_t *guid = to_nfit_uuid(nfit_mem->family);
1754 u8 revid = nfit_dsm_revid(nfit_mem->family, func);
1755 struct acpi_device *adev = nfit_mem->adev;
1756 acpi_handle handle = adev->handle;
1757 union acpi_object *out_obj;
1759 if ((nfit_mem->dsm_mask & (1 << func)) == 0)
1762 out_obj = acpi_evaluate_dsm(handle, guid, revid, func, &in_obj);
1766 if (smart.flags & ND_INTEL_SMART_SHUTDOWN_VALID) {
1767 if (smart.shutdown_state)
1768 set_bit(NFIT_MEM_DIRTY, &nfit_mem->flags);
1771 if (smart.flags & ND_INTEL_SMART_SHUTDOWN_COUNT_VALID) {
1772 set_bit(NFIT_MEM_DIRTY_COUNT, &nfit_mem->flags);
1773 nfit_mem->dirty_shutdown = smart.shutdown_count;
1778 static void populate_shutdown_status(struct nfit_mem *nfit_mem)
1781 * For DIMMs that provide a dynamic facility to retrieve a
1782 * dirty-shutdown status and/or a dirty-shutdown count, cache
1783 * these values in nfit_mem.
1785 if (nfit_mem->family == NVDIMM_FAMILY_INTEL)
1786 nfit_intel_shutdown_status(nfit_mem);
1789 static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
1790 struct nfit_mem *nfit_mem, u32 device_handle)
1792 struct acpi_device *adev, *adev_dimm;
1793 struct device *dev = acpi_desc->dev;
1794 unsigned long dsm_mask, label_mask;
1798 struct acpi_nfit_control_region *dcr = nfit_mem->dcr;
1800 /* nfit test assumes 1:1 relationship between commands and dsms */
1801 nfit_mem->dsm_mask = acpi_desc->dimm_cmd_force_en;
1802 nfit_mem->family = NVDIMM_FAMILY_INTEL;
1804 if (dcr->valid_fields & ACPI_NFIT_CONTROL_MFG_INFO_VALID)
1805 sprintf(nfit_mem->id, "%04x-%02x-%04x-%08x",
1806 be16_to_cpu(dcr->vendor_id),
1807 dcr->manufacturing_location,
1808 be16_to_cpu(dcr->manufacturing_date),
1809 be32_to_cpu(dcr->serial_number));
1811 sprintf(nfit_mem->id, "%04x-%08x",
1812 be16_to_cpu(dcr->vendor_id),
1813 be32_to_cpu(dcr->serial_number));
1815 adev = to_acpi_dev(acpi_desc);
1817 /* unit test case */
1818 populate_shutdown_status(nfit_mem);
1822 adev_dimm = acpi_find_child_device(adev, device_handle, false);
1823 nfit_mem->adev = adev_dimm;
1825 dev_err(dev, "no ACPI.NFIT device with _ADR %#x, disabling...\n",
1827 return force_enable_dimms ? 0 : -ENODEV;
1830 if (ACPI_FAILURE(acpi_install_notify_handler(adev_dimm->handle,
1831 ACPI_DEVICE_NOTIFY, acpi_nvdimm_notify, adev_dimm))) {
1832 dev_err(dev, "%s: notification registration failed\n",
1833 dev_name(&adev_dimm->dev));
1837 * Record nfit_mem for the notification path to track back to
1838 * the nfit sysfs attributes for this dimm device object.
1840 dev_set_drvdata(&adev_dimm->dev, nfit_mem);
1843 * Until standardization materializes we need to consider 4
1844 * different command sets. Note, that checking for function0 (bit0)
1845 * tells us if any commands are reachable through this GUID.
1847 for (i = 0; i <= NVDIMM_FAMILY_MAX; i++)
1848 if (acpi_check_dsm(adev_dimm->handle, to_nfit_uuid(i), 1, 1))
1849 if (family < 0 || i == default_dsm_family)
1852 /* limit the supported commands to those that are publicly documented */
1853 nfit_mem->family = family;
1854 if (override_dsm_mask && !disable_vendor_specific)
1855 dsm_mask = override_dsm_mask;
1856 else if (nfit_mem->family == NVDIMM_FAMILY_INTEL) {
1857 dsm_mask = NVDIMM_INTEL_CMDMASK;
1858 if (disable_vendor_specific)
1859 dsm_mask &= ~(1 << ND_CMD_VENDOR);
1860 } else if (nfit_mem->family == NVDIMM_FAMILY_HPE1) {
1861 dsm_mask = 0x1c3c76;
1862 } else if (nfit_mem->family == NVDIMM_FAMILY_HPE2) {
1864 if (disable_vendor_specific)
1865 dsm_mask &= ~(1 << 8);
1866 } else if (nfit_mem->family == NVDIMM_FAMILY_MSFT) {
1867 dsm_mask = 0xffffffff;
1869 dev_dbg(dev, "unknown dimm command family\n");
1870 nfit_mem->family = -1;
1871 /* DSMs are optional, continue loading the driver... */
1875 guid = to_nfit_uuid(nfit_mem->family);
1876 for_each_set_bit(i, &dsm_mask, BITS_PER_LONG)
1877 if (acpi_check_dsm(adev_dimm->handle, guid,
1878 nfit_dsm_revid(nfit_mem->family, i),
1880 set_bit(i, &nfit_mem->dsm_mask);
1883 * Prefer the NVDIMM_FAMILY_INTEL label read commands if present
1884 * due to their better semantics handling locked capacity.
1886 label_mask = 1 << ND_CMD_GET_CONFIG_SIZE | 1 << ND_CMD_GET_CONFIG_DATA
1887 | 1 << ND_CMD_SET_CONFIG_DATA;
1888 if (family == NVDIMM_FAMILY_INTEL
1889 && (dsm_mask & label_mask) == label_mask)
1892 if (acpi_nvdimm_has_method(adev_dimm, "_LSI")
1893 && acpi_nvdimm_has_method(adev_dimm, "_LSR")) {
1894 dev_dbg(dev, "%s: has _LSR\n", dev_name(&adev_dimm->dev));
1895 set_bit(NFIT_MEM_LSR, &nfit_mem->flags);
1898 if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)
1899 && acpi_nvdimm_has_method(adev_dimm, "_LSW")) {
1900 dev_dbg(dev, "%s: has _LSW\n", dev_name(&adev_dimm->dev));
1901 set_bit(NFIT_MEM_LSW, &nfit_mem->flags);
1904 populate_shutdown_status(nfit_mem);
1909 static void shutdown_dimm_notify(void *data)
1911 struct acpi_nfit_desc *acpi_desc = data;
1912 struct nfit_mem *nfit_mem;
1914 mutex_lock(&acpi_desc->init_mutex);
1916 * Clear out the nfit_mem->flags_attr and shut down dimm event
1919 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
1920 struct acpi_device *adev_dimm = nfit_mem->adev;
1922 if (nfit_mem->flags_attr) {
1923 sysfs_put(nfit_mem->flags_attr);
1924 nfit_mem->flags_attr = NULL;
1927 acpi_remove_notify_handler(adev_dimm->handle,
1928 ACPI_DEVICE_NOTIFY, acpi_nvdimm_notify);
1929 dev_set_drvdata(&adev_dimm->dev, NULL);
1932 mutex_unlock(&acpi_desc->init_mutex);
1935 static const struct nvdimm_security_ops *acpi_nfit_get_security_ops(int family)
1938 case NVDIMM_FAMILY_INTEL:
1939 return intel_security_ops;
1945 static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
1947 struct nfit_mem *nfit_mem;
1948 int dimm_count = 0, rc;
1949 struct nvdimm *nvdimm;
1951 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
1952 struct acpi_nfit_flush_address *flush;
1953 unsigned long flags = 0, cmd_mask;
1954 struct nfit_memdev *nfit_memdev;
1958 device_handle = __to_nfit_memdev(nfit_mem)->device_handle;
1959 nvdimm = acpi_nfit_dimm_by_handle(acpi_desc, device_handle);
1965 if (nfit_mem->bdw && nfit_mem->memdev_pmem)
1966 set_bit(NDD_ALIASING, &flags);
1968 /* collate flags across all memdevs for this dimm */
1969 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
1970 struct acpi_nfit_memory_map *dimm_memdev;
1972 dimm_memdev = __to_nfit_memdev(nfit_mem);
1973 if (dimm_memdev->device_handle
1974 != nfit_memdev->memdev->device_handle)
1976 dimm_memdev->flags |= nfit_memdev->memdev->flags;
1979 mem_flags = __to_nfit_memdev(nfit_mem)->flags;
1980 if (mem_flags & ACPI_NFIT_MEM_NOT_ARMED)
1981 set_bit(NDD_UNARMED, &flags);
1983 rc = acpi_nfit_add_dimm(acpi_desc, nfit_mem, device_handle);
1988 * TODO: provide translation for non-NVDIMM_FAMILY_INTEL
1989 * devices (i.e. from nd_cmd to acpi_dsm) to standardize the
1990 * userspace interface.
1992 cmd_mask = 1UL << ND_CMD_CALL;
1993 if (nfit_mem->family == NVDIMM_FAMILY_INTEL) {
1995 * These commands have a 1:1 correspondence
1996 * between DSM payload and libnvdimm ioctl
1999 cmd_mask |= nfit_mem->dsm_mask & NVDIMM_STANDARD_CMDMASK;
2002 if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)) {
2003 set_bit(ND_CMD_GET_CONFIG_SIZE, &cmd_mask);
2004 set_bit(ND_CMD_GET_CONFIG_DATA, &cmd_mask);
2006 if (test_bit(NFIT_MEM_LSW, &nfit_mem->flags))
2007 set_bit(ND_CMD_SET_CONFIG_DATA, &cmd_mask);
2009 flush = nfit_mem->nfit_flush ? nfit_mem->nfit_flush->flush
2011 nvdimm = __nvdimm_create(acpi_desc->nvdimm_bus, nfit_mem,
2012 acpi_nfit_dimm_attribute_groups,
2013 flags, cmd_mask, flush ? flush->hint_count : 0,
2014 nfit_mem->flush_wpq, &nfit_mem->id[0],
2015 acpi_nfit_get_security_ops(nfit_mem->family));
2019 nfit_mem->nvdimm = nvdimm;
2022 if ((mem_flags & ACPI_NFIT_MEM_FAILED_MASK) == 0)
2025 dev_info(acpi_desc->dev, "%s flags:%s%s%s%s%s\n",
2026 nvdimm_name(nvdimm),
2027 mem_flags & ACPI_NFIT_MEM_SAVE_FAILED ? " save_fail" : "",
2028 mem_flags & ACPI_NFIT_MEM_RESTORE_FAILED ? " restore_fail":"",
2029 mem_flags & ACPI_NFIT_MEM_FLUSH_FAILED ? " flush_fail" : "",
2030 mem_flags & ACPI_NFIT_MEM_NOT_ARMED ? " not_armed" : "",
2031 mem_flags & ACPI_NFIT_MEM_MAP_FAILED ? " map_fail" : "");
2035 rc = nvdimm_bus_check_dimm_count(acpi_desc->nvdimm_bus, dimm_count);
2040 * Now that dimms are successfully registered, and async registration
2041 * is flushed, attempt to enable event notification.
2043 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
2044 struct kernfs_node *nfit_kernfs;
2046 nvdimm = nfit_mem->nvdimm;
2050 rc = nvdimm_security_setup_events(nvdimm);
2052 dev_warn(acpi_desc->dev,
2053 "security event setup failed: %d\n", rc);
2055 nfit_kernfs = sysfs_get_dirent(nvdimm_kobj(nvdimm)->sd, "nfit");
2057 nfit_mem->flags_attr = sysfs_get_dirent(nfit_kernfs,
2059 sysfs_put(nfit_kernfs);
2060 if (!nfit_mem->flags_attr)
2061 dev_warn(acpi_desc->dev, "%s: notifications disabled\n",
2062 nvdimm_name(nvdimm));
2065 return devm_add_action_or_reset(acpi_desc->dev, shutdown_dimm_notify,
2070 * These constants are private because there are no kernel consumers of
2073 enum nfit_aux_cmds {
2074 NFIT_CMD_TRANSLATE_SPA = 5,
2075 NFIT_CMD_ARS_INJECT_SET = 7,
2076 NFIT_CMD_ARS_INJECT_CLEAR = 8,
2077 NFIT_CMD_ARS_INJECT_GET = 9,
2080 static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc)
2082 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2083 const guid_t *guid = to_nfit_uuid(NFIT_DEV_BUS);
2084 struct acpi_device *adev;
2085 unsigned long dsm_mask;
2088 nd_desc->cmd_mask = acpi_desc->bus_cmd_force_en;
2089 nd_desc->bus_dsm_mask = acpi_desc->bus_nfit_cmd_force_en;
2090 adev = to_acpi_dev(acpi_desc);
2094 for (i = ND_CMD_ARS_CAP; i <= ND_CMD_CLEAR_ERROR; i++)
2095 if (acpi_check_dsm(adev->handle, guid, 1, 1ULL << i))
2096 set_bit(i, &nd_desc->cmd_mask);
2097 set_bit(ND_CMD_CALL, &nd_desc->cmd_mask);
2100 (1 << ND_CMD_ARS_CAP) |
2101 (1 << ND_CMD_ARS_START) |
2102 (1 << ND_CMD_ARS_STATUS) |
2103 (1 << ND_CMD_CLEAR_ERROR) |
2104 (1 << NFIT_CMD_TRANSLATE_SPA) |
2105 (1 << NFIT_CMD_ARS_INJECT_SET) |
2106 (1 << NFIT_CMD_ARS_INJECT_CLEAR) |
2107 (1 << NFIT_CMD_ARS_INJECT_GET);
2108 for_each_set_bit(i, &dsm_mask, BITS_PER_LONG)
2109 if (acpi_check_dsm(adev->handle, guid, 1, 1ULL << i))
2110 set_bit(i, &nd_desc->bus_dsm_mask);
2113 static ssize_t range_index_show(struct device *dev,
2114 struct device_attribute *attr, char *buf)
2116 struct nd_region *nd_region = to_nd_region(dev);
2117 struct nfit_spa *nfit_spa = nd_region_provider_data(nd_region);
2119 return sprintf(buf, "%d\n", nfit_spa->spa->range_index);
2121 static DEVICE_ATTR_RO(range_index);
2123 static struct attribute *acpi_nfit_region_attributes[] = {
2124 &dev_attr_range_index.attr,
2128 static const struct attribute_group acpi_nfit_region_attribute_group = {
2130 .attrs = acpi_nfit_region_attributes,
2133 static const struct attribute_group *acpi_nfit_region_attribute_groups[] = {
2134 &nd_region_attribute_group,
2135 &nd_mapping_attribute_group,
2136 &nd_device_attribute_group,
2137 &nd_numa_attribute_group,
2138 &acpi_nfit_region_attribute_group,
2142 /* enough info to uniquely specify an interleave set */
2143 struct nfit_set_info {
2144 struct nfit_set_info_map {
2151 struct nfit_set_info2 {
2152 struct nfit_set_info_map2 {
2156 u16 manufacturing_date;
2157 u8 manufacturing_location;
2162 static size_t sizeof_nfit_set_info(int num_mappings)
2164 return sizeof(struct nfit_set_info)
2165 + num_mappings * sizeof(struct nfit_set_info_map);
2168 static size_t sizeof_nfit_set_info2(int num_mappings)
2170 return sizeof(struct nfit_set_info2)
2171 + num_mappings * sizeof(struct nfit_set_info_map2);
2174 static int cmp_map_compat(const void *m0, const void *m1)
2176 const struct nfit_set_info_map *map0 = m0;
2177 const struct nfit_set_info_map *map1 = m1;
2179 return memcmp(&map0->region_offset, &map1->region_offset,
2183 static int cmp_map(const void *m0, const void *m1)
2185 const struct nfit_set_info_map *map0 = m0;
2186 const struct nfit_set_info_map *map1 = m1;
2188 if (map0->region_offset < map1->region_offset)
2190 else if (map0->region_offset > map1->region_offset)
2195 static int cmp_map2(const void *m0, const void *m1)
2197 const struct nfit_set_info_map2 *map0 = m0;
2198 const struct nfit_set_info_map2 *map1 = m1;
2200 if (map0->region_offset < map1->region_offset)
2202 else if (map0->region_offset > map1->region_offset)
2207 /* Retrieve the nth entry referencing this spa */
2208 static struct acpi_nfit_memory_map *memdev_from_spa(
2209 struct acpi_nfit_desc *acpi_desc, u16 range_index, int n)
2211 struct nfit_memdev *nfit_memdev;
2213 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list)
2214 if (nfit_memdev->memdev->range_index == range_index)
2216 return nfit_memdev->memdev;
2220 static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc *acpi_desc,
2221 struct nd_region_desc *ndr_desc,
2222 struct acpi_nfit_system_address *spa)
2224 struct device *dev = acpi_desc->dev;
2225 struct nd_interleave_set *nd_set;
2226 u16 nr = ndr_desc->num_mappings;
2227 struct nfit_set_info2 *info2;
2228 struct nfit_set_info *info;
2231 nd_set = devm_kzalloc(dev, sizeof(*nd_set), GFP_KERNEL);
2234 ndr_desc->nd_set = nd_set;
2235 guid_copy(&nd_set->type_guid, (guid_t *) spa->range_guid);
2237 info = devm_kzalloc(dev, sizeof_nfit_set_info(nr), GFP_KERNEL);
2241 info2 = devm_kzalloc(dev, sizeof_nfit_set_info2(nr), GFP_KERNEL);
2245 for (i = 0; i < nr; i++) {
2246 struct nd_mapping_desc *mapping = &ndr_desc->mapping[i];
2247 struct nfit_set_info_map *map = &info->mapping[i];
2248 struct nfit_set_info_map2 *map2 = &info2->mapping[i];
2249 struct nvdimm *nvdimm = mapping->nvdimm;
2250 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
2251 struct acpi_nfit_memory_map *memdev = memdev_from_spa(acpi_desc,
2252 spa->range_index, i);
2253 struct acpi_nfit_control_region *dcr = nfit_mem->dcr;
2255 if (!memdev || !nfit_mem->dcr) {
2256 dev_err(dev, "%s: failed to find DCR\n", __func__);
2260 map->region_offset = memdev->region_offset;
2261 map->serial_number = dcr->serial_number;
2263 map2->region_offset = memdev->region_offset;
2264 map2->serial_number = dcr->serial_number;
2265 map2->vendor_id = dcr->vendor_id;
2266 map2->manufacturing_date = dcr->manufacturing_date;
2267 map2->manufacturing_location = dcr->manufacturing_location;
2270 /* v1.1 namespaces */
2271 sort(&info->mapping[0], nr, sizeof(struct nfit_set_info_map),
2273 nd_set->cookie1 = nd_fletcher64(info, sizeof_nfit_set_info(nr), 0);
2275 /* v1.2 namespaces */
2276 sort(&info2->mapping[0], nr, sizeof(struct nfit_set_info_map2),
2278 nd_set->cookie2 = nd_fletcher64(info2, sizeof_nfit_set_info2(nr), 0);
2280 /* support v1.1 namespaces created with the wrong sort order */
2281 sort(&info->mapping[0], nr, sizeof(struct nfit_set_info_map),
2282 cmp_map_compat, NULL);
2283 nd_set->altcookie = nd_fletcher64(info, sizeof_nfit_set_info(nr), 0);
2285 /* record the result of the sort for the mapping position */
2286 for (i = 0; i < nr; i++) {
2287 struct nfit_set_info_map2 *map2 = &info2->mapping[i];
2290 for (j = 0; j < nr; j++) {
2291 struct nd_mapping_desc *mapping = &ndr_desc->mapping[j];
2292 struct nvdimm *nvdimm = mapping->nvdimm;
2293 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
2294 struct acpi_nfit_control_region *dcr = nfit_mem->dcr;
2296 if (map2->serial_number == dcr->serial_number &&
2297 map2->vendor_id == dcr->vendor_id &&
2298 map2->manufacturing_date == dcr->manufacturing_date &&
2299 map2->manufacturing_location
2300 == dcr->manufacturing_location) {
2301 mapping->position = i;
2307 ndr_desc->nd_set = nd_set;
2308 devm_kfree(dev, info);
2309 devm_kfree(dev, info2);
2314 static u64 to_interleave_offset(u64 offset, struct nfit_blk_mmio *mmio)
2316 struct acpi_nfit_interleave *idt = mmio->idt;
2317 u32 sub_line_offset, line_index, line_offset;
2318 u64 line_no, table_skip_count, table_offset;
2320 line_no = div_u64_rem(offset, mmio->line_size, &sub_line_offset);
2321 table_skip_count = div_u64_rem(line_no, mmio->num_lines, &line_index);
2322 line_offset = idt->line_offset[line_index]
2324 table_offset = table_skip_count * mmio->table_size;
2326 return mmio->base_offset + line_offset + table_offset + sub_line_offset;
2329 static u32 read_blk_stat(struct nfit_blk *nfit_blk, unsigned int bw)
2331 struct nfit_blk_mmio *mmio = &nfit_blk->mmio[DCR];
2332 u64 offset = nfit_blk->stat_offset + mmio->size * bw;
2333 const u32 STATUS_MASK = 0x80000037;
2335 if (mmio->num_lines)
2336 offset = to_interleave_offset(offset, mmio);
2338 return readl(mmio->addr.base + offset) & STATUS_MASK;
2341 static void write_blk_ctl(struct nfit_blk *nfit_blk, unsigned int bw,
2342 resource_size_t dpa, unsigned int len, unsigned int write)
2345 struct nfit_blk_mmio *mmio = &nfit_blk->mmio[DCR];
2348 BCW_OFFSET_MASK = (1ULL << 48)-1,
2350 BCW_LEN_MASK = (1ULL << 8) - 1,
2354 cmd = (dpa >> L1_CACHE_SHIFT) & BCW_OFFSET_MASK;
2355 len = len >> L1_CACHE_SHIFT;
2356 cmd |= ((u64) len & BCW_LEN_MASK) << BCW_LEN_SHIFT;
2357 cmd |= ((u64) write) << BCW_CMD_SHIFT;
2359 offset = nfit_blk->cmd_offset + mmio->size * bw;
2360 if (mmio->num_lines)
2361 offset = to_interleave_offset(offset, mmio);
2363 writeq(cmd, mmio->addr.base + offset);
2364 nvdimm_flush(nfit_blk->nd_region);
2366 if (nfit_blk->dimm_flags & NFIT_BLK_DCR_LATCH)
2367 readq(mmio->addr.base + offset);
2370 static int acpi_nfit_blk_single_io(struct nfit_blk *nfit_blk,
2371 resource_size_t dpa, void *iobuf, size_t len, int rw,
2374 struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
2375 unsigned int copied = 0;
2379 base_offset = nfit_blk->bdw_offset + dpa % L1_CACHE_BYTES
2380 + lane * mmio->size;
2381 write_blk_ctl(nfit_blk, lane, dpa, len, rw);
2386 if (mmio->num_lines) {
2389 offset = to_interleave_offset(base_offset + copied,
2391 div_u64_rem(offset, mmio->line_size, &line_offset);
2392 c = min_t(size_t, len, mmio->line_size - line_offset);
2394 offset = base_offset + nfit_blk->bdw_offset;
2399 memcpy_flushcache(mmio->addr.aperture + offset, iobuf + copied, c);
2401 if (nfit_blk->dimm_flags & NFIT_BLK_READ_FLUSH)
2402 arch_invalidate_pmem((void __force *)
2403 mmio->addr.aperture + offset, c);
2405 memcpy(iobuf + copied, mmio->addr.aperture + offset, c);
2413 nvdimm_flush(nfit_blk->nd_region);
2415 rc = read_blk_stat(nfit_blk, lane) ? -EIO : 0;
2419 static int acpi_nfit_blk_region_do_io(struct nd_blk_region *ndbr,
2420 resource_size_t dpa, void *iobuf, u64 len, int rw)
2422 struct nfit_blk *nfit_blk = nd_blk_region_provider_data(ndbr);
2423 struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
2424 struct nd_region *nd_region = nfit_blk->nd_region;
2425 unsigned int lane, copied = 0;
2428 lane = nd_region_acquire_lane(nd_region);
2430 u64 c = min(len, mmio->size);
2432 rc = acpi_nfit_blk_single_io(nfit_blk, dpa + copied,
2433 iobuf + copied, c, rw, lane);
2440 nd_region_release_lane(nd_region, lane);
2445 static int nfit_blk_init_interleave(struct nfit_blk_mmio *mmio,
2446 struct acpi_nfit_interleave *idt, u16 interleave_ways)
2449 mmio->num_lines = idt->line_count;
2450 mmio->line_size = idt->line_size;
2451 if (interleave_ways == 0)
2453 mmio->table_size = mmio->num_lines * interleave_ways
2460 static int acpi_nfit_blk_get_flags(struct nvdimm_bus_descriptor *nd_desc,
2461 struct nvdimm *nvdimm, struct nfit_blk *nfit_blk)
2463 struct nd_cmd_dimm_flags flags;
2466 memset(&flags, 0, sizeof(flags));
2467 rc = nd_desc->ndctl(nd_desc, nvdimm, ND_CMD_DIMM_FLAGS, &flags,
2468 sizeof(flags), NULL);
2470 if (rc >= 0 && flags.status == 0)
2471 nfit_blk->dimm_flags = flags.flags;
2472 else if (rc == -ENOTTY) {
2473 /* fall back to a conservative default */
2474 nfit_blk->dimm_flags = NFIT_BLK_DCR_LATCH | NFIT_BLK_READ_FLUSH;
2482 static int acpi_nfit_blk_region_enable(struct nvdimm_bus *nvdimm_bus,
2485 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
2486 struct nd_blk_region *ndbr = to_nd_blk_region(dev);
2487 struct nfit_blk_mmio *mmio;
2488 struct nfit_blk *nfit_blk;
2489 struct nfit_mem *nfit_mem;
2490 struct nvdimm *nvdimm;
2493 nvdimm = nd_blk_region_to_dimm(ndbr);
2494 nfit_mem = nvdimm_provider_data(nvdimm);
2495 if (!nfit_mem || !nfit_mem->dcr || !nfit_mem->bdw) {
2496 dev_dbg(dev, "missing%s%s%s\n",
2497 nfit_mem ? "" : " nfit_mem",
2498 (nfit_mem && nfit_mem->dcr) ? "" : " dcr",
2499 (nfit_mem && nfit_mem->bdw) ? "" : " bdw");
2503 nfit_blk = devm_kzalloc(dev, sizeof(*nfit_blk), GFP_KERNEL);
2506 nd_blk_region_set_provider_data(ndbr, nfit_blk);
2507 nfit_blk->nd_region = to_nd_region(dev);
2509 /* map block aperture memory */
2510 nfit_blk->bdw_offset = nfit_mem->bdw->offset;
2511 mmio = &nfit_blk->mmio[BDW];
2512 mmio->addr.base = devm_nvdimm_memremap(dev, nfit_mem->spa_bdw->address,
2513 nfit_mem->spa_bdw->length, nd_blk_memremap_flags(ndbr));
2514 if (!mmio->addr.base) {
2515 dev_dbg(dev, "%s failed to map bdw\n",
2516 nvdimm_name(nvdimm));
2519 mmio->size = nfit_mem->bdw->size;
2520 mmio->base_offset = nfit_mem->memdev_bdw->region_offset;
2521 mmio->idt = nfit_mem->idt_bdw;
2522 mmio->spa = nfit_mem->spa_bdw;
2523 rc = nfit_blk_init_interleave(mmio, nfit_mem->idt_bdw,
2524 nfit_mem->memdev_bdw->interleave_ways);
2526 dev_dbg(dev, "%s failed to init bdw interleave\n",
2527 nvdimm_name(nvdimm));
2531 /* map block control memory */
2532 nfit_blk->cmd_offset = nfit_mem->dcr->command_offset;
2533 nfit_blk->stat_offset = nfit_mem->dcr->status_offset;
2534 mmio = &nfit_blk->mmio[DCR];
2535 mmio->addr.base = devm_nvdimm_ioremap(dev, nfit_mem->spa_dcr->address,
2536 nfit_mem->spa_dcr->length);
2537 if (!mmio->addr.base) {
2538 dev_dbg(dev, "%s failed to map dcr\n",
2539 nvdimm_name(nvdimm));
2542 mmio->size = nfit_mem->dcr->window_size;
2543 mmio->base_offset = nfit_mem->memdev_dcr->region_offset;
2544 mmio->idt = nfit_mem->idt_dcr;
2545 mmio->spa = nfit_mem->spa_dcr;
2546 rc = nfit_blk_init_interleave(mmio, nfit_mem->idt_dcr,
2547 nfit_mem->memdev_dcr->interleave_ways);
2549 dev_dbg(dev, "%s failed to init dcr interleave\n",
2550 nvdimm_name(nvdimm));
2554 rc = acpi_nfit_blk_get_flags(nd_desc, nvdimm, nfit_blk);
2556 dev_dbg(dev, "%s failed get DIMM flags\n",
2557 nvdimm_name(nvdimm));
2561 if (nvdimm_has_flush(nfit_blk->nd_region) < 0)
2562 dev_warn(dev, "unable to guarantee persistence of writes\n");
2564 if (mmio->line_size == 0)
2567 if ((u32) nfit_blk->cmd_offset % mmio->line_size
2568 + 8 > mmio->line_size) {
2569 dev_dbg(dev, "cmd_offset crosses interleave boundary\n");
2571 } else if ((u32) nfit_blk->stat_offset % mmio->line_size
2572 + 8 > mmio->line_size) {
2573 dev_dbg(dev, "stat_offset crosses interleave boundary\n");
2580 static int ars_get_cap(struct acpi_nfit_desc *acpi_desc,
2581 struct nd_cmd_ars_cap *cmd, struct nfit_spa *nfit_spa)
2583 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2584 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2587 cmd->address = spa->address;
2588 cmd->length = spa->length;
2589 rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_CAP, cmd,
2590 sizeof(*cmd), &cmd_rc);
2596 static int ars_start(struct acpi_nfit_desc *acpi_desc,
2597 struct nfit_spa *nfit_spa, enum nfit_ars_state req_type)
2601 struct nd_cmd_ars_start ars_start;
2602 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2603 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2605 memset(&ars_start, 0, sizeof(ars_start));
2606 ars_start.address = spa->address;
2607 ars_start.length = spa->length;
2608 if (req_type == ARS_REQ_SHORT)
2609 ars_start.flags = ND_ARS_RETURN_PREV_DATA;
2610 if (nfit_spa_type(spa) == NFIT_SPA_PM)
2611 ars_start.type = ND_ARS_PERSISTENT;
2612 else if (nfit_spa_type(spa) == NFIT_SPA_VOLATILE)
2613 ars_start.type = ND_ARS_VOLATILE;
2617 rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_START, &ars_start,
2618 sizeof(ars_start), &cmd_rc);
2625 static int ars_continue(struct acpi_nfit_desc *acpi_desc)
2628 struct nd_cmd_ars_start ars_start;
2629 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2630 struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
2632 memset(&ars_start, 0, sizeof(ars_start));
2633 ars_start.address = ars_status->restart_address;
2634 ars_start.length = ars_status->restart_length;
2635 ars_start.type = ars_status->type;
2636 ars_start.flags = acpi_desc->ars_start_flags;
2637 rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_START, &ars_start,
2638 sizeof(ars_start), &cmd_rc);
2644 static int ars_get_status(struct acpi_nfit_desc *acpi_desc)
2646 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2647 struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
2650 rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_STATUS, ars_status,
2651 acpi_desc->max_ars, &cmd_rc);
2657 static void ars_complete(struct acpi_nfit_desc *acpi_desc,
2658 struct nfit_spa *nfit_spa)
2660 struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
2661 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2662 struct nd_region *nd_region = nfit_spa->nd_region;
2665 lockdep_assert_held(&acpi_desc->init_mutex);
2667 * Only advance the ARS state for ARS runs initiated by the
2668 * kernel, ignore ARS results from BIOS initiated runs for scrub
2669 * completion tracking.
2671 if (acpi_desc->scrub_spa != nfit_spa)
2674 if ((ars_status->address >= spa->address && ars_status->address
2675 < spa->address + spa->length)
2676 || (ars_status->address < spa->address)) {
2678 * Assume that if a scrub starts at an offset from the
2679 * start of nfit_spa that we are in the continuation
2682 * Otherwise, if the scrub covers the spa range, mark
2683 * any pending request complete.
2685 if (ars_status->address + ars_status->length
2686 >= spa->address + spa->length)
2693 acpi_desc->scrub_spa = NULL;
2695 dev = nd_region_dev(nd_region);
2696 nvdimm_region_notify(nd_region, NVDIMM_REVALIDATE_POISON);
2698 dev = acpi_desc->dev;
2699 dev_dbg(dev, "ARS: range %d complete\n", spa->range_index);
2702 static int ars_status_process_records(struct acpi_nfit_desc *acpi_desc)
2704 struct nvdimm_bus *nvdimm_bus = acpi_desc->nvdimm_bus;
2705 struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
2710 * First record starts at 44 byte offset from the start of the
2713 if (ars_status->out_length < 44)
2715 for (i = 0; i < ars_status->num_records; i++) {
2716 /* only process full records */
2717 if (ars_status->out_length
2718 < 44 + sizeof(struct nd_ars_record) * (i + 1))
2720 rc = nvdimm_bus_add_badrange(nvdimm_bus,
2721 ars_status->records[i].err_address,
2722 ars_status->records[i].length);
2726 if (i < ars_status->num_records)
2727 dev_warn(acpi_desc->dev, "detected truncated ars results\n");
2732 static void acpi_nfit_remove_resource(void *data)
2734 struct resource *res = data;
2736 remove_resource(res);
2739 static int acpi_nfit_insert_resource(struct acpi_nfit_desc *acpi_desc,
2740 struct nd_region_desc *ndr_desc)
2742 struct resource *res, *nd_res = ndr_desc->res;
2745 /* No operation if the region is already registered as PMEM */
2746 is_pmem = region_intersects(nd_res->start, resource_size(nd_res),
2747 IORESOURCE_MEM, IORES_DESC_PERSISTENT_MEMORY);
2748 if (is_pmem == REGION_INTERSECTS)
2751 res = devm_kzalloc(acpi_desc->dev, sizeof(*res), GFP_KERNEL);
2755 res->name = "Persistent Memory";
2756 res->start = nd_res->start;
2757 res->end = nd_res->end;
2758 res->flags = IORESOURCE_MEM;
2759 res->desc = IORES_DESC_PERSISTENT_MEMORY;
2761 ret = insert_resource(&iomem_resource, res);
2765 ret = devm_add_action_or_reset(acpi_desc->dev,
2766 acpi_nfit_remove_resource,
2774 static int acpi_nfit_init_mapping(struct acpi_nfit_desc *acpi_desc,
2775 struct nd_mapping_desc *mapping, struct nd_region_desc *ndr_desc,
2776 struct acpi_nfit_memory_map *memdev,
2777 struct nfit_spa *nfit_spa)
2779 struct nvdimm *nvdimm = acpi_nfit_dimm_by_handle(acpi_desc,
2780 memdev->device_handle);
2781 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2782 struct nd_blk_region_desc *ndbr_desc;
2783 struct nfit_mem *nfit_mem;
2787 dev_err(acpi_desc->dev, "spa%d dimm: %#x not found\n",
2788 spa->range_index, memdev->device_handle);
2792 mapping->nvdimm = nvdimm;
2793 switch (nfit_spa_type(spa)) {
2795 case NFIT_SPA_VOLATILE:
2796 mapping->start = memdev->address;
2797 mapping->size = memdev->region_size;
2800 nfit_mem = nvdimm_provider_data(nvdimm);
2801 if (!nfit_mem || !nfit_mem->bdw) {
2802 dev_dbg(acpi_desc->dev, "spa%d %s missing bdw\n",
2803 spa->range_index, nvdimm_name(nvdimm));
2807 mapping->size = nfit_mem->bdw->capacity;
2808 mapping->start = nfit_mem->bdw->start_address;
2809 ndr_desc->num_lanes = nfit_mem->bdw->windows;
2810 ndr_desc->mapping = mapping;
2811 ndr_desc->num_mappings = 1;
2812 ndbr_desc = to_blk_region_desc(ndr_desc);
2813 ndbr_desc->enable = acpi_nfit_blk_region_enable;
2814 ndbr_desc->do_io = acpi_desc->blk_do_io;
2815 rc = acpi_nfit_init_interleave_set(acpi_desc, ndr_desc, spa);
2818 nfit_spa->nd_region = nvdimm_blk_region_create(acpi_desc->nvdimm_bus,
2820 if (!nfit_spa->nd_region)
2828 static bool nfit_spa_is_virtual(struct acpi_nfit_system_address *spa)
2830 return (nfit_spa_type(spa) == NFIT_SPA_VDISK ||
2831 nfit_spa_type(spa) == NFIT_SPA_VCD ||
2832 nfit_spa_type(spa) == NFIT_SPA_PDISK ||
2833 nfit_spa_type(spa) == NFIT_SPA_PCD);
2836 static bool nfit_spa_is_volatile(struct acpi_nfit_system_address *spa)
2838 return (nfit_spa_type(spa) == NFIT_SPA_VDISK ||
2839 nfit_spa_type(spa) == NFIT_SPA_VCD ||
2840 nfit_spa_type(spa) == NFIT_SPA_VOLATILE);
2843 static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc,
2844 struct nfit_spa *nfit_spa)
2846 static struct nd_mapping_desc mappings[ND_MAX_MAPPINGS];
2847 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2848 struct nd_blk_region_desc ndbr_desc;
2849 struct nd_region_desc *ndr_desc;
2850 struct nfit_memdev *nfit_memdev;
2851 struct nvdimm_bus *nvdimm_bus;
2852 struct resource res;
2855 if (nfit_spa->nd_region)
2858 if (spa->range_index == 0 && !nfit_spa_is_virtual(spa)) {
2859 dev_dbg(acpi_desc->dev, "detected invalid spa index\n");
2863 memset(&res, 0, sizeof(res));
2864 memset(&mappings, 0, sizeof(mappings));
2865 memset(&ndbr_desc, 0, sizeof(ndbr_desc));
2866 res.start = spa->address;
2867 res.end = res.start + spa->length - 1;
2868 ndr_desc = &ndbr_desc.ndr_desc;
2869 ndr_desc->res = &res;
2870 ndr_desc->provider_data = nfit_spa;
2871 ndr_desc->attr_groups = acpi_nfit_region_attribute_groups;
2872 if (spa->flags & ACPI_NFIT_PROXIMITY_VALID)
2873 ndr_desc->numa_node = acpi_map_pxm_to_online_node(
2874 spa->proximity_domain);
2876 ndr_desc->numa_node = NUMA_NO_NODE;
2879 * Persistence domain bits are hierarchical, if
2880 * ACPI_NFIT_CAPABILITY_CACHE_FLUSH is set then
2881 * ACPI_NFIT_CAPABILITY_MEM_FLUSH is implied.
2883 if (acpi_desc->platform_cap & ACPI_NFIT_CAPABILITY_CACHE_FLUSH)
2884 set_bit(ND_REGION_PERSIST_CACHE, &ndr_desc->flags);
2885 else if (acpi_desc->platform_cap & ACPI_NFIT_CAPABILITY_MEM_FLUSH)
2886 set_bit(ND_REGION_PERSIST_MEMCTRL, &ndr_desc->flags);
2888 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
2889 struct acpi_nfit_memory_map *memdev = nfit_memdev->memdev;
2890 struct nd_mapping_desc *mapping;
2892 if (memdev->range_index != spa->range_index)
2894 if (count >= ND_MAX_MAPPINGS) {
2895 dev_err(acpi_desc->dev, "spa%d exceeds max mappings %d\n",
2896 spa->range_index, ND_MAX_MAPPINGS);
2899 mapping = &mappings[count++];
2900 rc = acpi_nfit_init_mapping(acpi_desc, mapping, ndr_desc,
2906 ndr_desc->mapping = mappings;
2907 ndr_desc->num_mappings = count;
2908 rc = acpi_nfit_init_interleave_set(acpi_desc, ndr_desc, spa);
2912 nvdimm_bus = acpi_desc->nvdimm_bus;
2913 if (nfit_spa_type(spa) == NFIT_SPA_PM) {
2914 rc = acpi_nfit_insert_resource(acpi_desc, ndr_desc);
2916 dev_warn(acpi_desc->dev,
2917 "failed to insert pmem resource to iomem: %d\n",
2922 nfit_spa->nd_region = nvdimm_pmem_region_create(nvdimm_bus,
2924 if (!nfit_spa->nd_region)
2926 } else if (nfit_spa_is_volatile(spa)) {
2927 nfit_spa->nd_region = nvdimm_volatile_region_create(nvdimm_bus,
2929 if (!nfit_spa->nd_region)
2931 } else if (nfit_spa_is_virtual(spa)) {
2932 nfit_spa->nd_region = nvdimm_pmem_region_create(nvdimm_bus,
2934 if (!nfit_spa->nd_region)
2940 dev_err(acpi_desc->dev, "failed to register spa range %d\n",
2941 nfit_spa->spa->range_index);
2945 static int ars_status_alloc(struct acpi_nfit_desc *acpi_desc)
2947 struct device *dev = acpi_desc->dev;
2948 struct nd_cmd_ars_status *ars_status;
2950 if (acpi_desc->ars_status) {
2951 memset(acpi_desc->ars_status, 0, acpi_desc->max_ars);
2955 ars_status = devm_kzalloc(dev, acpi_desc->max_ars, GFP_KERNEL);
2958 acpi_desc->ars_status = ars_status;
2962 static int acpi_nfit_query_poison(struct acpi_nfit_desc *acpi_desc)
2966 if (ars_status_alloc(acpi_desc))
2969 rc = ars_get_status(acpi_desc);
2971 if (rc < 0 && rc != -ENOSPC)
2974 if (ars_status_process_records(acpi_desc))
2975 dev_err(acpi_desc->dev, "Failed to process ARS records\n");
2980 static int ars_register(struct acpi_nfit_desc *acpi_desc,
2981 struct nfit_spa *nfit_spa)
2985 if (no_init_ars || test_bit(ARS_FAILED, &nfit_spa->ars_state))
2986 return acpi_nfit_register_region(acpi_desc, nfit_spa);
2988 set_bit(ARS_REQ_SHORT, &nfit_spa->ars_state);
2989 set_bit(ARS_REQ_LONG, &nfit_spa->ars_state);
2991 switch (acpi_nfit_query_poison(acpi_desc)) {
2994 rc = ars_start(acpi_desc, nfit_spa, ARS_REQ_SHORT);
2995 /* shouldn't happen, try again later */
2999 set_bit(ARS_FAILED, &nfit_spa->ars_state);
3002 clear_bit(ARS_REQ_SHORT, &nfit_spa->ars_state);
3003 rc = acpi_nfit_query_poison(acpi_desc);
3006 acpi_desc->scrub_spa = nfit_spa;
3007 ars_complete(acpi_desc, nfit_spa);
3009 * If ars_complete() says we didn't complete the
3010 * short scrub, we'll try again with a long
3013 acpi_desc->scrub_spa = NULL;
3019 * BIOS was using ARS, wait for it to complete (or
3020 * resources to become available) and then perform our
3025 set_bit(ARS_FAILED, &nfit_spa->ars_state);
3029 return acpi_nfit_register_region(acpi_desc, nfit_spa);
3032 static void ars_complete_all(struct acpi_nfit_desc *acpi_desc)
3034 struct nfit_spa *nfit_spa;
3036 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3037 if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
3039 ars_complete(acpi_desc, nfit_spa);
3043 static unsigned int __acpi_nfit_scrub(struct acpi_nfit_desc *acpi_desc,
3046 unsigned int tmo = acpi_desc->scrub_tmo;
3047 struct device *dev = acpi_desc->dev;
3048 struct nfit_spa *nfit_spa;
3050 lockdep_assert_held(&acpi_desc->init_mutex);
3052 if (acpi_desc->cancel)
3055 if (query_rc == -EBUSY) {
3056 dev_dbg(dev, "ARS: ARS busy\n");
3057 return min(30U * 60U, tmo * 2);
3059 if (query_rc == -ENOSPC) {
3060 dev_dbg(dev, "ARS: ARS continue\n");
3061 ars_continue(acpi_desc);
3064 if (query_rc && query_rc != -EAGAIN) {
3065 unsigned long long addr, end;
3067 addr = acpi_desc->ars_status->address;
3068 end = addr + acpi_desc->ars_status->length;
3069 dev_dbg(dev, "ARS: %llx-%llx failed (%d)\n", addr, end,
3073 ars_complete_all(acpi_desc);
3074 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3075 enum nfit_ars_state req_type;
3078 if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
3081 /* prefer short ARS requests first */
3082 if (test_bit(ARS_REQ_SHORT, &nfit_spa->ars_state))
3083 req_type = ARS_REQ_SHORT;
3084 else if (test_bit(ARS_REQ_LONG, &nfit_spa->ars_state))
3085 req_type = ARS_REQ_LONG;
3088 rc = ars_start(acpi_desc, nfit_spa, req_type);
3090 dev = nd_region_dev(nfit_spa->nd_region);
3091 dev_dbg(dev, "ARS: range %d ARS start %s (%d)\n",
3092 nfit_spa->spa->range_index,
3093 req_type == ARS_REQ_SHORT ? "short" : "long",
3096 * Hmm, we raced someone else starting ARS? Try again in
3102 dev_WARN_ONCE(dev, acpi_desc->scrub_spa,
3103 "scrub start while range %d active\n",
3104 acpi_desc->scrub_spa->spa->range_index);
3105 clear_bit(req_type, &nfit_spa->ars_state);
3106 acpi_desc->scrub_spa = nfit_spa;
3108 * Consider this spa last for future scrub
3111 list_move_tail(&nfit_spa->list, &acpi_desc->spas);
3115 dev_err(dev, "ARS: range %d ARS failed (%d)\n",
3116 nfit_spa->spa->range_index, rc);
3117 set_bit(ARS_FAILED, &nfit_spa->ars_state);
3122 static void __sched_ars(struct acpi_nfit_desc *acpi_desc, unsigned int tmo)
3124 lockdep_assert_held(&acpi_desc->init_mutex);
3126 acpi_desc->scrub_busy = 1;
3127 /* note this should only be set from within the workqueue */
3129 acpi_desc->scrub_tmo = tmo;
3130 queue_delayed_work(nfit_wq, &acpi_desc->dwork, tmo * HZ);
3133 static void sched_ars(struct acpi_nfit_desc *acpi_desc)
3135 __sched_ars(acpi_desc, 0);
3138 static void notify_ars_done(struct acpi_nfit_desc *acpi_desc)
3140 lockdep_assert_held(&acpi_desc->init_mutex);
3142 acpi_desc->scrub_busy = 0;
3143 acpi_desc->scrub_count++;
3144 if (acpi_desc->scrub_count_state)
3145 sysfs_notify_dirent(acpi_desc->scrub_count_state);
3148 static void acpi_nfit_scrub(struct work_struct *work)
3150 struct acpi_nfit_desc *acpi_desc;
3154 acpi_desc = container_of(work, typeof(*acpi_desc), dwork.work);
3155 mutex_lock(&acpi_desc->init_mutex);
3156 query_rc = acpi_nfit_query_poison(acpi_desc);
3157 tmo = __acpi_nfit_scrub(acpi_desc, query_rc);
3159 __sched_ars(acpi_desc, tmo);
3161 notify_ars_done(acpi_desc);
3162 memset(acpi_desc->ars_status, 0, acpi_desc->max_ars);
3163 mutex_unlock(&acpi_desc->init_mutex);
3166 static void acpi_nfit_init_ars(struct acpi_nfit_desc *acpi_desc,
3167 struct nfit_spa *nfit_spa)
3169 int type = nfit_spa_type(nfit_spa->spa);
3170 struct nd_cmd_ars_cap ars_cap;
3173 set_bit(ARS_FAILED, &nfit_spa->ars_state);
3174 memset(&ars_cap, 0, sizeof(ars_cap));
3175 rc = ars_get_cap(acpi_desc, &ars_cap, nfit_spa);
3178 /* check that the supported scrub types match the spa type */
3179 if (type == NFIT_SPA_VOLATILE && ((ars_cap.status >> 16)
3180 & ND_ARS_VOLATILE) == 0)
3182 if (type == NFIT_SPA_PM && ((ars_cap.status >> 16)
3183 & ND_ARS_PERSISTENT) == 0)
3186 nfit_spa->max_ars = ars_cap.max_ars_out;
3187 nfit_spa->clear_err_unit = ars_cap.clear_err_unit;
3188 acpi_desc->max_ars = max(nfit_spa->max_ars, acpi_desc->max_ars);
3189 clear_bit(ARS_FAILED, &nfit_spa->ars_state);
3192 static int acpi_nfit_register_regions(struct acpi_nfit_desc *acpi_desc)
3194 struct nfit_spa *nfit_spa;
3197 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3198 switch (nfit_spa_type(nfit_spa->spa)) {
3199 case NFIT_SPA_VOLATILE:
3201 acpi_nfit_init_ars(acpi_desc, nfit_spa);
3206 list_for_each_entry(nfit_spa, &acpi_desc->spas, list)
3207 switch (nfit_spa_type(nfit_spa->spa)) {
3208 case NFIT_SPA_VOLATILE:
3210 /* register regions and kick off initial ARS run */
3211 rc = ars_register(acpi_desc, nfit_spa);
3216 /* nothing to register */
3219 case NFIT_SPA_VDISK:
3221 case NFIT_SPA_PDISK:
3223 /* register known regions that don't support ARS */
3224 rc = acpi_nfit_register_region(acpi_desc, nfit_spa);
3229 /* don't register unknown regions */
3233 sched_ars(acpi_desc);
3237 static int acpi_nfit_check_deletions(struct acpi_nfit_desc *acpi_desc,
3238 struct nfit_table_prev *prev)
3240 struct device *dev = acpi_desc->dev;
3242 if (!list_empty(&prev->spas) ||
3243 !list_empty(&prev->memdevs) ||
3244 !list_empty(&prev->dcrs) ||
3245 !list_empty(&prev->bdws) ||
3246 !list_empty(&prev->idts) ||
3247 !list_empty(&prev->flushes)) {
3248 dev_err(dev, "new nfit deletes entries (unsupported)\n");
3254 static int acpi_nfit_desc_init_scrub_attr(struct acpi_nfit_desc *acpi_desc)
3256 struct device *dev = acpi_desc->dev;
3257 struct kernfs_node *nfit;
3258 struct device *bus_dev;
3260 if (!ars_supported(acpi_desc->nvdimm_bus))
3263 bus_dev = to_nvdimm_bus_dev(acpi_desc->nvdimm_bus);
3264 nfit = sysfs_get_dirent(bus_dev->kobj.sd, "nfit");
3266 dev_err(dev, "sysfs_get_dirent 'nfit' failed\n");
3269 acpi_desc->scrub_count_state = sysfs_get_dirent(nfit, "scrub");
3271 if (!acpi_desc->scrub_count_state) {
3272 dev_err(dev, "sysfs_get_dirent 'scrub' failed\n");
3279 static void acpi_nfit_unregister(void *data)
3281 struct acpi_nfit_desc *acpi_desc = data;
3283 nvdimm_bus_unregister(acpi_desc->nvdimm_bus);
3286 int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *data, acpi_size sz)
3288 struct device *dev = acpi_desc->dev;
3289 struct nfit_table_prev prev;
3293 if (!acpi_desc->nvdimm_bus) {
3294 acpi_nfit_init_dsms(acpi_desc);
3296 acpi_desc->nvdimm_bus = nvdimm_bus_register(dev,
3297 &acpi_desc->nd_desc);
3298 if (!acpi_desc->nvdimm_bus)
3301 rc = devm_add_action_or_reset(dev, acpi_nfit_unregister,
3306 rc = acpi_nfit_desc_init_scrub_attr(acpi_desc);
3310 /* register this acpi_desc for mce notifications */
3311 mutex_lock(&acpi_desc_lock);
3312 list_add_tail(&acpi_desc->list, &acpi_descs);
3313 mutex_unlock(&acpi_desc_lock);
3316 mutex_lock(&acpi_desc->init_mutex);
3318 INIT_LIST_HEAD(&prev.spas);
3319 INIT_LIST_HEAD(&prev.memdevs);
3320 INIT_LIST_HEAD(&prev.dcrs);
3321 INIT_LIST_HEAD(&prev.bdws);
3322 INIT_LIST_HEAD(&prev.idts);
3323 INIT_LIST_HEAD(&prev.flushes);
3325 list_cut_position(&prev.spas, &acpi_desc->spas,
3326 acpi_desc->spas.prev);
3327 list_cut_position(&prev.memdevs, &acpi_desc->memdevs,
3328 acpi_desc->memdevs.prev);
3329 list_cut_position(&prev.dcrs, &acpi_desc->dcrs,
3330 acpi_desc->dcrs.prev);
3331 list_cut_position(&prev.bdws, &acpi_desc->bdws,
3332 acpi_desc->bdws.prev);
3333 list_cut_position(&prev.idts, &acpi_desc->idts,
3334 acpi_desc->idts.prev);
3335 list_cut_position(&prev.flushes, &acpi_desc->flushes,
3336 acpi_desc->flushes.prev);
3339 while (!IS_ERR_OR_NULL(data))
3340 data = add_table(acpi_desc, &prev, data, end);
3343 dev_dbg(dev, "nfit table parsing error: %ld\n", PTR_ERR(data));
3348 rc = acpi_nfit_check_deletions(acpi_desc, &prev);
3352 rc = nfit_mem_init(acpi_desc);
3356 rc = acpi_nfit_register_dimms(acpi_desc);
3360 rc = acpi_nfit_register_regions(acpi_desc);
3363 mutex_unlock(&acpi_desc->init_mutex);
3366 EXPORT_SYMBOL_GPL(acpi_nfit_init);
3368 static int acpi_nfit_flush_probe(struct nvdimm_bus_descriptor *nd_desc)
3370 struct acpi_nfit_desc *acpi_desc = to_acpi_nfit_desc(nd_desc);
3371 struct device *dev = acpi_desc->dev;
3373 /* Bounce the device lock to flush acpi_nfit_add / acpi_nfit_notify */
3377 /* Bounce the init_mutex to complete initial registration */
3378 mutex_lock(&acpi_desc->init_mutex);
3379 mutex_unlock(&acpi_desc->init_mutex);
3384 static int __acpi_nfit_clear_to_send(struct nvdimm_bus_descriptor *nd_desc,
3385 struct nvdimm *nvdimm, unsigned int cmd)
3387 struct acpi_nfit_desc *acpi_desc = to_acpi_nfit_desc(nd_desc);
3391 if (cmd != ND_CMD_ARS_START)
3395 * The kernel and userspace may race to initiate a scrub, but
3396 * the scrub thread is prepared to lose that initial race. It
3397 * just needs guarantees that any ARS it initiates are not
3398 * interrupted by any intervening start requests from userspace.
3400 if (work_busy(&acpi_desc->dwork.work))
3406 /* prevent security commands from being issued via ioctl */
3407 static int acpi_nfit_clear_to_send(struct nvdimm_bus_descriptor *nd_desc,
3408 struct nvdimm *nvdimm, unsigned int cmd, void *buf)
3410 struct nd_cmd_pkg *call_pkg = buf;
3413 if (nvdimm && cmd == ND_CMD_CALL &&
3414 call_pkg->nd_family == NVDIMM_FAMILY_INTEL) {
3415 func = call_pkg->nd_command;
3416 if ((1 << func) & NVDIMM_INTEL_SECURITY_CMDMASK)
3420 return __acpi_nfit_clear_to_send(nd_desc, nvdimm, cmd);
3423 int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc,
3424 enum nfit_ars_state req_type)
3426 struct device *dev = acpi_desc->dev;
3427 int scheduled = 0, busy = 0;
3428 struct nfit_spa *nfit_spa;
3430 mutex_lock(&acpi_desc->init_mutex);
3431 if (acpi_desc->cancel) {
3432 mutex_unlock(&acpi_desc->init_mutex);
3436 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3437 int type = nfit_spa_type(nfit_spa->spa);
3439 if (type != NFIT_SPA_PM && type != NFIT_SPA_VOLATILE)
3441 if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
3444 if (test_and_set_bit(req_type, &nfit_spa->ars_state))
3450 sched_ars(acpi_desc);
3451 dev_dbg(dev, "ars_scan triggered\n");
3453 mutex_unlock(&acpi_desc->init_mutex);
3462 void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev)
3464 struct nvdimm_bus_descriptor *nd_desc;
3466 dev_set_drvdata(dev, acpi_desc);
3467 acpi_desc->dev = dev;
3468 acpi_desc->blk_do_io = acpi_nfit_blk_region_do_io;
3469 nd_desc = &acpi_desc->nd_desc;
3470 nd_desc->provider_name = "ACPI.NFIT";
3471 nd_desc->module = THIS_MODULE;
3472 nd_desc->ndctl = acpi_nfit_ctl;
3473 nd_desc->flush_probe = acpi_nfit_flush_probe;
3474 nd_desc->clear_to_send = acpi_nfit_clear_to_send;
3475 nd_desc->attr_groups = acpi_nfit_attribute_groups;
3477 INIT_LIST_HEAD(&acpi_desc->spas);
3478 INIT_LIST_HEAD(&acpi_desc->dcrs);
3479 INIT_LIST_HEAD(&acpi_desc->bdws);
3480 INIT_LIST_HEAD(&acpi_desc->idts);
3481 INIT_LIST_HEAD(&acpi_desc->flushes);
3482 INIT_LIST_HEAD(&acpi_desc->memdevs);
3483 INIT_LIST_HEAD(&acpi_desc->dimms);
3484 INIT_LIST_HEAD(&acpi_desc->list);
3485 mutex_init(&acpi_desc->init_mutex);
3486 acpi_desc->scrub_tmo = 1;
3487 INIT_DELAYED_WORK(&acpi_desc->dwork, acpi_nfit_scrub);
3489 EXPORT_SYMBOL_GPL(acpi_nfit_desc_init);
3491 static void acpi_nfit_put_table(void *table)
3493 acpi_put_table(table);
3496 void acpi_nfit_shutdown(void *data)
3498 struct acpi_nfit_desc *acpi_desc = data;
3499 struct device *bus_dev = to_nvdimm_bus_dev(acpi_desc->nvdimm_bus);
3502 * Destruct under acpi_desc_lock so that nfit_handle_mce does not
3505 mutex_lock(&acpi_desc_lock);
3506 list_del(&acpi_desc->list);
3507 mutex_unlock(&acpi_desc_lock);
3509 mutex_lock(&acpi_desc->init_mutex);
3510 acpi_desc->cancel = 1;
3511 cancel_delayed_work_sync(&acpi_desc->dwork);
3512 mutex_unlock(&acpi_desc->init_mutex);
3515 * Bounce the nvdimm bus lock to make sure any in-flight
3516 * acpi_nfit_ars_rescan() submissions have had a chance to
3517 * either submit or see ->cancel set.
3519 device_lock(bus_dev);
3520 device_unlock(bus_dev);
3522 flush_workqueue(nfit_wq);
3524 EXPORT_SYMBOL_GPL(acpi_nfit_shutdown);
3526 static int acpi_nfit_add(struct acpi_device *adev)
3528 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
3529 struct acpi_nfit_desc *acpi_desc;
3530 struct device *dev = &adev->dev;
3531 struct acpi_table_header *tbl;
3532 acpi_status status = AE_OK;
3536 status = acpi_get_table(ACPI_SIG_NFIT, 0, &tbl);
3537 if (ACPI_FAILURE(status)) {
3538 /* The NVDIMM root device allows OS to trigger enumeration of
3539 * NVDIMMs through NFIT at boot time and re-enumeration at
3540 * root level via the _FIT method during runtime.
3541 * This is ok to return 0 here, we could have an nvdimm
3542 * hotplugged later and evaluate _FIT method which returns
3543 * data in the format of a series of NFIT Structures.
3545 dev_dbg(dev, "failed to find NFIT at startup\n");
3549 rc = devm_add_action_or_reset(dev, acpi_nfit_put_table, tbl);
3554 acpi_desc = devm_kzalloc(dev, sizeof(*acpi_desc), GFP_KERNEL);
3557 acpi_nfit_desc_init(acpi_desc, &adev->dev);
3559 /* Save the acpi header for exporting the revision via sysfs */
3560 acpi_desc->acpi_header = *tbl;
3562 /* Evaluate _FIT and override with that if present */
3563 status = acpi_evaluate_object(adev->handle, "_FIT", NULL, &buf);
3564 if (ACPI_SUCCESS(status) && buf.length > 0) {
3565 union acpi_object *obj = buf.pointer;
3567 if (obj->type == ACPI_TYPE_BUFFER)
3568 rc = acpi_nfit_init(acpi_desc, obj->buffer.pointer,
3569 obj->buffer.length);
3571 dev_dbg(dev, "invalid type %d, ignoring _FIT\n",
3575 /* skip over the lead-in header table */
3576 rc = acpi_nfit_init(acpi_desc, (void *) tbl
3577 + sizeof(struct acpi_table_nfit),
3578 sz - sizeof(struct acpi_table_nfit));
3582 return devm_add_action_or_reset(dev, acpi_nfit_shutdown, acpi_desc);
3585 static int acpi_nfit_remove(struct acpi_device *adev)
3587 /* see acpi_nfit_unregister */
3591 static void acpi_nfit_update_notify(struct device *dev, acpi_handle handle)
3593 struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(dev);
3594 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
3595 union acpi_object *obj;
3600 /* dev->driver may be null if we're being removed */
3601 dev_dbg(dev, "no driver found for dev\n");
3606 acpi_desc = devm_kzalloc(dev, sizeof(*acpi_desc), GFP_KERNEL);
3609 acpi_nfit_desc_init(acpi_desc, dev);
3612 * Finish previous registration before considering new
3615 flush_workqueue(nfit_wq);
3619 status = acpi_evaluate_object(handle, "_FIT", NULL, &buf);
3620 if (ACPI_FAILURE(status)) {
3621 dev_err(dev, "failed to evaluate _FIT\n");
3626 if (obj->type == ACPI_TYPE_BUFFER) {
3627 ret = acpi_nfit_init(acpi_desc, obj->buffer.pointer,
3628 obj->buffer.length);
3630 dev_err(dev, "failed to merge updated NFIT\n");
3632 dev_err(dev, "Invalid _FIT\n");
3636 static void acpi_nfit_uc_error_notify(struct device *dev, acpi_handle handle)
3638 struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(dev);
3640 if (acpi_desc->scrub_mode == HW_ERROR_SCRUB_ON)
3641 acpi_nfit_ars_rescan(acpi_desc, ARS_REQ_LONG);
3643 acpi_nfit_ars_rescan(acpi_desc, ARS_REQ_SHORT);
3646 void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event)
3648 dev_dbg(dev, "event: 0x%x\n", event);
3651 case NFIT_NOTIFY_UPDATE:
3652 return acpi_nfit_update_notify(dev, handle);
3653 case NFIT_NOTIFY_UC_MEMORY_ERROR:
3654 return acpi_nfit_uc_error_notify(dev, handle);
3659 EXPORT_SYMBOL_GPL(__acpi_nfit_notify);
3661 static void acpi_nfit_notify(struct acpi_device *adev, u32 event)
3663 device_lock(&adev->dev);
3664 __acpi_nfit_notify(&adev->dev, adev->handle, event);
3665 device_unlock(&adev->dev);
3668 static const struct acpi_device_id acpi_nfit_ids[] = {
3672 MODULE_DEVICE_TABLE(acpi, acpi_nfit_ids);
3674 static struct acpi_driver acpi_nfit_driver = {
3675 .name = KBUILD_MODNAME,
3676 .ids = acpi_nfit_ids,
3678 .add = acpi_nfit_add,
3679 .remove = acpi_nfit_remove,
3680 .notify = acpi_nfit_notify,
3684 static __init int nfit_init(void)
3688 BUILD_BUG_ON(sizeof(struct acpi_table_nfit) != 40);
3689 BUILD_BUG_ON(sizeof(struct acpi_nfit_system_address) != 56);
3690 BUILD_BUG_ON(sizeof(struct acpi_nfit_memory_map) != 48);
3691 BUILD_BUG_ON(sizeof(struct acpi_nfit_interleave) != 20);
3692 BUILD_BUG_ON(sizeof(struct acpi_nfit_smbios) != 9);
3693 BUILD_BUG_ON(sizeof(struct acpi_nfit_control_region) != 80);
3694 BUILD_BUG_ON(sizeof(struct acpi_nfit_data_region) != 40);
3695 BUILD_BUG_ON(sizeof(struct acpi_nfit_capabilities) != 16);
3697 guid_parse(UUID_VOLATILE_MEMORY, &nfit_uuid[NFIT_SPA_VOLATILE]);
3698 guid_parse(UUID_PERSISTENT_MEMORY, &nfit_uuid[NFIT_SPA_PM]);
3699 guid_parse(UUID_CONTROL_REGION, &nfit_uuid[NFIT_SPA_DCR]);
3700 guid_parse(UUID_DATA_REGION, &nfit_uuid[NFIT_SPA_BDW]);
3701 guid_parse(UUID_VOLATILE_VIRTUAL_DISK, &nfit_uuid[NFIT_SPA_VDISK]);
3702 guid_parse(UUID_VOLATILE_VIRTUAL_CD, &nfit_uuid[NFIT_SPA_VCD]);
3703 guid_parse(UUID_PERSISTENT_VIRTUAL_DISK, &nfit_uuid[NFIT_SPA_PDISK]);
3704 guid_parse(UUID_PERSISTENT_VIRTUAL_CD, &nfit_uuid[NFIT_SPA_PCD]);
3705 guid_parse(UUID_NFIT_BUS, &nfit_uuid[NFIT_DEV_BUS]);
3706 guid_parse(UUID_NFIT_DIMM, &nfit_uuid[NFIT_DEV_DIMM]);
3707 guid_parse(UUID_NFIT_DIMM_N_HPE1, &nfit_uuid[NFIT_DEV_DIMM_N_HPE1]);
3708 guid_parse(UUID_NFIT_DIMM_N_HPE2, &nfit_uuid[NFIT_DEV_DIMM_N_HPE2]);
3709 guid_parse(UUID_NFIT_DIMM_N_MSFT, &nfit_uuid[NFIT_DEV_DIMM_N_MSFT]);
3711 nfit_wq = create_singlethread_workqueue("nfit");
3715 nfit_mce_register();
3716 ret = acpi_bus_register_driver(&acpi_nfit_driver);
3718 nfit_mce_unregister();
3719 destroy_workqueue(nfit_wq);
3726 static __exit void nfit_exit(void)
3728 nfit_mce_unregister();
3729 acpi_bus_unregister_driver(&acpi_nfit_driver);
3730 destroy_workqueue(nfit_wq);
3731 WARN_ON(!list_empty(&acpi_descs));
3734 module_init(nfit_init);
3735 module_exit(nfit_exit);
3736 MODULE_LICENSE("GPL v2");
3737 MODULE_AUTHOR("Intel Corporation");