1
2
3
4
5#include <linux/list_sort.h>
6#include <linux/libnvdimm.h>
7#include <linux/module.h>
8#include <linux/nospec.h>
9#include <linux/mutex.h>
10#include <linux/ndctl.h>
11#include <linux/sysfs.h>
12#include <linux/delay.h>
13#include <linux/list.h>
14#include <linux/acpi.h>
15#include <linux/sort.h>
16#include <linux/io.h>
17#include <linux/nd.h>
18#include <asm/cacheflush.h>
19#include <acpi/nfit.h>
20#include "intel.h"
21#include "nfit.h"
22
23
24
25
26
27#include <linux/io-64-nonatomic-hi-lo.h>
28
29static bool force_enable_dimms;
30module_param(force_enable_dimms, bool, S_IRUGO|S_IWUSR);
31MODULE_PARM_DESC(force_enable_dimms, "Ignore _STA (ACPI DIMM device) status");
32
33static bool disable_vendor_specific;
34module_param(disable_vendor_specific, bool, S_IRUGO);
35MODULE_PARM_DESC(disable_vendor_specific,
36 "Limit commands to the publicly specified set");
37
38static unsigned long override_dsm_mask;
39module_param(override_dsm_mask, ulong, S_IRUGO);
40MODULE_PARM_DESC(override_dsm_mask, "Bitmask of allowed NVDIMM DSM functions");
41
42static int default_dsm_family = -1;
43module_param(default_dsm_family, int, S_IRUGO);
44MODULE_PARM_DESC(default_dsm_family,
45 "Try this DSM type first when identifying NVDIMM family");
46
47static bool no_init_ars;
48module_param(no_init_ars, bool, 0644);
49MODULE_PARM_DESC(no_init_ars, "Skip ARS run at nfit init time");
50
51static bool force_labels;
52module_param(force_labels, bool, 0444);
53MODULE_PARM_DESC(force_labels, "Opt-in to labels despite missing methods");
54
55LIST_HEAD(acpi_descs);
56DEFINE_MUTEX(acpi_desc_lock);
57
58static struct workqueue_struct *nfit_wq;
59
60struct nfit_table_prev {
61 struct list_head spas;
62 struct list_head memdevs;
63 struct list_head dcrs;
64 struct list_head bdws;
65 struct list_head idts;
66 struct list_head flushes;
67};
68
69static guid_t nfit_uuid[NFIT_UUID_MAX];
70
71const guid_t *to_nfit_uuid(enum nfit_uuids id)
72{
73 return &nfit_uuid[id];
74}
75EXPORT_SYMBOL(to_nfit_uuid);
76
77static const guid_t *to_nfit_bus_uuid(int family)
78{
79 if (WARN_ONCE(family == NVDIMM_BUS_FAMILY_NFIT,
80 "only secondary bus families can be translated\n"))
81 return NULL;
82
83
84
85
86 return to_nfit_uuid(family + NVDIMM_FAMILY_MAX);
87}
88
89static struct acpi_device *to_acpi_dev(struct acpi_nfit_desc *acpi_desc)
90{
91 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
92
93
94
95
96
97 if (!nd_desc->provider_name
98 || strcmp(nd_desc->provider_name, "ACPI.NFIT") != 0)
99 return NULL;
100
101 return to_acpi_device(acpi_desc->dev);
102}
103
104static int xlat_bus_status(void *buf, unsigned int cmd, u32 status)
105{
106 struct nd_cmd_clear_error *clear_err;
107 struct nd_cmd_ars_status *ars_status;
108 u16 flags;
109
110 switch (cmd) {
111 case ND_CMD_ARS_CAP:
112 if ((status & 0xffff) == NFIT_ARS_CAP_NONE)
113 return -ENOTTY;
114
115
116 if (status & 0xffff)
117 return -EIO;
118
119
120 flags = ND_ARS_PERSISTENT | ND_ARS_VOLATILE;
121 if ((status >> 16 & flags) == 0)
122 return -ENOTTY;
123 return 0;
124 case ND_CMD_ARS_START:
125
126 if ((status & 0xffff) == NFIT_ARS_START_BUSY)
127 return -EBUSY;
128
129
130 if (status & 0xffff)
131 return -EIO;
132 return 0;
133 case ND_CMD_ARS_STATUS:
134 ars_status = buf;
135
136 if (status & 0xffff)
137 return -EIO;
138
139 if (status == NFIT_ARS_STATUS_DONE)
140 return 0;
141
142
143 if (status == NFIT_ARS_STATUS_BUSY)
144 return -EBUSY;
145
146
147 if (status == NFIT_ARS_STATUS_NONE)
148 return -EAGAIN;
149
150
151
152
153
154
155 if (status == NFIT_ARS_STATUS_INTR) {
156 if (ars_status->out_length >= 40 && (ars_status->flags
157 & NFIT_ARS_F_OVERFLOW))
158 return -ENOSPC;
159 return 0;
160 }
161
162
163 if (status >> 16)
164 return -EIO;
165 return 0;
166 case ND_CMD_CLEAR_ERROR:
167 clear_err = buf;
168 if (status & 0xffff)
169 return -EIO;
170 if (!clear_err->cleared)
171 return -EIO;
172 if (clear_err->length > clear_err->cleared)
173 return clear_err->cleared;
174 return 0;
175 default:
176 break;
177 }
178
179
180 if (status)
181 return -EIO;
182 return 0;
183}
184
185#define ACPI_LABELS_LOCKED 3
186
187static int xlat_nvdimm_status(struct nvdimm *nvdimm, void *buf, unsigned int cmd,
188 u32 status)
189{
190 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
191
192 switch (cmd) {
193 case ND_CMD_GET_CONFIG_SIZE:
194
195
196
197
198 if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags))
199 break;
200
201 if (status >> 16 & ND_CONFIG_LOCKED)
202 return -EACCES;
203 break;
204 case ND_CMD_GET_CONFIG_DATA:
205 if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)
206 && status == ACPI_LABELS_LOCKED)
207 return -EACCES;
208 break;
209 case ND_CMD_SET_CONFIG_DATA:
210 if (test_bit(NFIT_MEM_LSW, &nfit_mem->flags)
211 && status == ACPI_LABELS_LOCKED)
212 return -EACCES;
213 break;
214 default:
215 break;
216 }
217
218
219 if (status)
220 return -EIO;
221 return 0;
222}
223
224static int xlat_status(struct nvdimm *nvdimm, void *buf, unsigned int cmd,
225 u32 status)
226{
227 if (!nvdimm)
228 return xlat_bus_status(buf, cmd, status);
229 return xlat_nvdimm_status(nvdimm, buf, cmd, status);
230}
231
232
233static union acpi_object *pkg_to_buf(union acpi_object *pkg)
234{
235 int i;
236 void *dst;
237 size_t size = 0;
238 union acpi_object *buf = NULL;
239
240 if (pkg->type != ACPI_TYPE_PACKAGE) {
241 WARN_ONCE(1, "BIOS bug, unexpected element type: %d\n",
242 pkg->type);
243 goto err;
244 }
245
246 for (i = 0; i < pkg->package.count; i++) {
247 union acpi_object *obj = &pkg->package.elements[i];
248
249 if (obj->type == ACPI_TYPE_INTEGER)
250 size += 4;
251 else if (obj->type == ACPI_TYPE_BUFFER)
252 size += obj->buffer.length;
253 else {
254 WARN_ONCE(1, "BIOS bug, unexpected element type: %d\n",
255 obj->type);
256 goto err;
257 }
258 }
259
260 buf = ACPI_ALLOCATE(sizeof(*buf) + size);
261 if (!buf)
262 goto err;
263
264 dst = buf + 1;
265 buf->type = ACPI_TYPE_BUFFER;
266 buf->buffer.length = size;
267 buf->buffer.pointer = dst;
268 for (i = 0; i < pkg->package.count; i++) {
269 union acpi_object *obj = &pkg->package.elements[i];
270
271 if (obj->type == ACPI_TYPE_INTEGER) {
272 memcpy(dst, &obj->integer.value, 4);
273 dst += 4;
274 } else if (obj->type == ACPI_TYPE_BUFFER) {
275 memcpy(dst, obj->buffer.pointer, obj->buffer.length);
276 dst += obj->buffer.length;
277 }
278 }
279err:
280 ACPI_FREE(pkg);
281 return buf;
282}
283
284static union acpi_object *int_to_buf(union acpi_object *integer)
285{
286 union acpi_object *buf = NULL;
287 void *dst = NULL;
288
289 if (integer->type != ACPI_TYPE_INTEGER) {
290 WARN_ONCE(1, "BIOS bug, unexpected element type: %d\n",
291 integer->type);
292 goto err;
293 }
294
295 buf = ACPI_ALLOCATE(sizeof(*buf) + 4);
296 if (!buf)
297 goto err;
298
299 dst = buf + 1;
300 buf->type = ACPI_TYPE_BUFFER;
301 buf->buffer.length = 4;
302 buf->buffer.pointer = dst;
303 memcpy(dst, &integer->integer.value, 4);
304err:
305 ACPI_FREE(integer);
306 return buf;
307}
308
309static union acpi_object *acpi_label_write(acpi_handle handle, u32 offset,
310 u32 len, void *data)
311{
312 acpi_status rc;
313 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
314 struct acpi_object_list input = {
315 .count = 3,
316 .pointer = (union acpi_object []) {
317 [0] = {
318 .integer.type = ACPI_TYPE_INTEGER,
319 .integer.value = offset,
320 },
321 [1] = {
322 .integer.type = ACPI_TYPE_INTEGER,
323 .integer.value = len,
324 },
325 [2] = {
326 .buffer.type = ACPI_TYPE_BUFFER,
327 .buffer.pointer = data,
328 .buffer.length = len,
329 },
330 },
331 };
332
333 rc = acpi_evaluate_object(handle, "_LSW", &input, &buf);
334 if (ACPI_FAILURE(rc))
335 return NULL;
336 return int_to_buf(buf.pointer);
337}
338
339static union acpi_object *acpi_label_read(acpi_handle handle, u32 offset,
340 u32 len)
341{
342 acpi_status rc;
343 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
344 struct acpi_object_list input = {
345 .count = 2,
346 .pointer = (union acpi_object []) {
347 [0] = {
348 .integer.type = ACPI_TYPE_INTEGER,
349 .integer.value = offset,
350 },
351 [1] = {
352 .integer.type = ACPI_TYPE_INTEGER,
353 .integer.value = len,
354 },
355 },
356 };
357
358 rc = acpi_evaluate_object(handle, "_LSR", &input, &buf);
359 if (ACPI_FAILURE(rc))
360 return NULL;
361 return pkg_to_buf(buf.pointer);
362}
363
364static union acpi_object *acpi_label_info(acpi_handle handle)
365{
366 acpi_status rc;
367 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
368
369 rc = acpi_evaluate_object(handle, "_LSI", NULL, &buf);
370 if (ACPI_FAILURE(rc))
371 return NULL;
372 return pkg_to_buf(buf.pointer);
373}
374
375static u8 nfit_dsm_revid(unsigned family, unsigned func)
376{
377 static const u8 revid_table[NVDIMM_FAMILY_MAX+1][NVDIMM_CMD_MAX+1] = {
378 [NVDIMM_FAMILY_INTEL] = {
379 [NVDIMM_INTEL_GET_MODES ...
380 NVDIMM_INTEL_FW_ACTIVATE_ARM] = 2,
381 },
382 };
383 u8 id;
384
385 if (family > NVDIMM_FAMILY_MAX)
386 return 0;
387 if (func > NVDIMM_CMD_MAX)
388 return 0;
389 id = revid_table[family][func];
390 if (id == 0)
391 return 1;
392 return id;
393}
394
395static bool payload_dumpable(struct nvdimm *nvdimm, unsigned int func)
396{
397 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
398
399 if (nfit_mem && nfit_mem->family == NVDIMM_FAMILY_INTEL
400 && func >= NVDIMM_INTEL_GET_SECURITY_STATE
401 && func <= NVDIMM_INTEL_MASTER_SECURE_ERASE)
402 return IS_ENABLED(CONFIG_NFIT_SECURITY_DEBUG);
403 return true;
404}
405
406static int cmd_to_func(struct nfit_mem *nfit_mem, unsigned int cmd,
407 struct nd_cmd_pkg *call_pkg, int *family)
408{
409 if (call_pkg) {
410 int i;
411
412 if (nfit_mem && nfit_mem->family != call_pkg->nd_family)
413 return -ENOTTY;
414
415 for (i = 0; i < ARRAY_SIZE(call_pkg->nd_reserved2); i++)
416 if (call_pkg->nd_reserved2[i])
417 return -EINVAL;
418 *family = call_pkg->nd_family;
419 return call_pkg->nd_command;
420 }
421
422
423 if (!nfit_mem)
424 return cmd;
425
426
427 if (nfit_mem->family == NVDIMM_FAMILY_INTEL)
428 return cmd;
429
430
431
432
433
434 return 0;
435}
436
437int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
438 unsigned int cmd, void *buf, unsigned int buf_len, int *cmd_rc)
439{
440 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
441 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
442 union acpi_object in_obj, in_buf, *out_obj;
443 const struct nd_cmd_desc *desc = NULL;
444 struct device *dev = acpi_desc->dev;
445 struct nd_cmd_pkg *call_pkg = NULL;
446 const char *cmd_name, *dimm_name;
447 unsigned long cmd_mask, dsm_mask;
448 u32 offset, fw_status = 0;
449 acpi_handle handle;
450 const guid_t *guid;
451 int func, rc, i;
452 int family = 0;
453
454 if (cmd_rc)
455 *cmd_rc = -EINVAL;
456
457 if (cmd == ND_CMD_CALL)
458 call_pkg = buf;
459 func = cmd_to_func(nfit_mem, cmd, call_pkg, &family);
460 if (func < 0)
461 return func;
462
463 if (nvdimm) {
464 struct acpi_device *adev = nfit_mem->adev;
465
466 if (!adev)
467 return -ENOTTY;
468
469 dimm_name = nvdimm_name(nvdimm);
470 cmd_name = nvdimm_cmd_name(cmd);
471 cmd_mask = nvdimm_cmd_mask(nvdimm);
472 dsm_mask = nfit_mem->dsm_mask;
473 desc = nd_cmd_dimm_desc(cmd);
474 guid = to_nfit_uuid(nfit_mem->family);
475 handle = adev->handle;
476 } else {
477 struct acpi_device *adev = to_acpi_dev(acpi_desc);
478
479 cmd_name = nvdimm_bus_cmd_name(cmd);
480 cmd_mask = nd_desc->cmd_mask;
481 if (cmd == ND_CMD_CALL && call_pkg->nd_family) {
482 family = call_pkg->nd_family;
483 if (family > NVDIMM_BUS_FAMILY_MAX ||
484 !test_bit(family, &nd_desc->bus_family_mask))
485 return -EINVAL;
486 family = array_index_nospec(family,
487 NVDIMM_BUS_FAMILY_MAX + 1);
488 dsm_mask = acpi_desc->family_dsm_mask[family];
489 guid = to_nfit_bus_uuid(family);
490 } else {
491 dsm_mask = acpi_desc->bus_dsm_mask;
492 guid = to_nfit_uuid(NFIT_DEV_BUS);
493 }
494 desc = nd_cmd_bus_desc(cmd);
495 handle = adev->handle;
496 dimm_name = "bus";
497 }
498
499 if (!desc || (cmd && (desc->out_num + desc->in_num == 0)))
500 return -ENOTTY;
501
502
503
504
505
506 if (cmd == ND_CMD_CALL &&
507 (func > NVDIMM_CMD_MAX || !test_bit(func, &dsm_mask)))
508 return -ENOTTY;
509 else if (!test_bit(cmd, &cmd_mask))
510 return -ENOTTY;
511
512 in_obj.type = ACPI_TYPE_PACKAGE;
513 in_obj.package.count = 1;
514 in_obj.package.elements = &in_buf;
515 in_buf.type = ACPI_TYPE_BUFFER;
516 in_buf.buffer.pointer = buf;
517 in_buf.buffer.length = 0;
518
519
520 for (i = 0; i < desc->in_num; i++)
521 in_buf.buffer.length += nd_cmd_in_size(nvdimm, cmd, desc,
522 i, buf);
523
524 if (call_pkg) {
525
526 in_buf.buffer.pointer = (void *) &call_pkg->nd_payload;
527 in_buf.buffer.length = call_pkg->nd_size_in;
528 }
529
530 dev_dbg(dev, "%s cmd: %d: family: %d func: %d input length: %d\n",
531 dimm_name, cmd, family, func, in_buf.buffer.length);
532 if (payload_dumpable(nvdimm, func))
533 print_hex_dump_debug("nvdimm in ", DUMP_PREFIX_OFFSET, 4, 4,
534 in_buf.buffer.pointer,
535 min_t(u32, 256, in_buf.buffer.length), true);
536
537
538 if (nvdimm && cmd == ND_CMD_GET_CONFIG_SIZE
539 && test_bit(NFIT_MEM_LSR, &nfit_mem->flags))
540 out_obj = acpi_label_info(handle);
541 else if (nvdimm && cmd == ND_CMD_GET_CONFIG_DATA
542 && test_bit(NFIT_MEM_LSR, &nfit_mem->flags)) {
543 struct nd_cmd_get_config_data_hdr *p = buf;
544
545 out_obj = acpi_label_read(handle, p->in_offset, p->in_length);
546 } else if (nvdimm && cmd == ND_CMD_SET_CONFIG_DATA
547 && test_bit(NFIT_MEM_LSW, &nfit_mem->flags)) {
548 struct nd_cmd_set_config_hdr *p = buf;
549
550 out_obj = acpi_label_write(handle, p->in_offset, p->in_length,
551 p->in_buf);
552 } else {
553 u8 revid;
554
555 if (nvdimm)
556 revid = nfit_dsm_revid(nfit_mem->family, func);
557 else
558 revid = 1;
559 out_obj = acpi_evaluate_dsm(handle, guid, revid, func, &in_obj);
560 }
561
562 if (!out_obj) {
563 dev_dbg(dev, "%s _DSM failed cmd: %s\n", dimm_name, cmd_name);
564 return -EINVAL;
565 }
566
567 if (out_obj->type != ACPI_TYPE_BUFFER) {
568 dev_dbg(dev, "%s unexpected output object type cmd: %s type: %d\n",
569 dimm_name, cmd_name, out_obj->type);
570 rc = -EINVAL;
571 goto out;
572 }
573
574 dev_dbg(dev, "%s cmd: %s output length: %d\n", dimm_name,
575 cmd_name, out_obj->buffer.length);
576 print_hex_dump_debug(cmd_name, DUMP_PREFIX_OFFSET, 4, 4,
577 out_obj->buffer.pointer,
578 min_t(u32, 128, out_obj->buffer.length), true);
579
580 if (call_pkg) {
581 call_pkg->nd_fw_size = out_obj->buffer.length;
582 memcpy(call_pkg->nd_payload + call_pkg->nd_size_in,
583 out_obj->buffer.pointer,
584 min(call_pkg->nd_fw_size, call_pkg->nd_size_out));
585
586 ACPI_FREE(out_obj);
587
588
589
590
591
592
593 if (cmd_rc)
594 *cmd_rc = 0;
595 return 0;
596 }
597
598 for (i = 0, offset = 0; i < desc->out_num; i++) {
599 u32 out_size = nd_cmd_out_size(nvdimm, cmd, desc, i, buf,
600 (u32 *) out_obj->buffer.pointer,
601 out_obj->buffer.length - offset);
602
603 if (offset + out_size > out_obj->buffer.length) {
604 dev_dbg(dev, "%s output object underflow cmd: %s field: %d\n",
605 dimm_name, cmd_name, i);
606 break;
607 }
608
609 if (in_buf.buffer.length + offset + out_size > buf_len) {
610 dev_dbg(dev, "%s output overrun cmd: %s field: %d\n",
611 dimm_name, cmd_name, i);
612 rc = -ENXIO;
613 goto out;
614 }
615 memcpy(buf + in_buf.buffer.length + offset,
616 out_obj->buffer.pointer + offset, out_size);
617 offset += out_size;
618 }
619
620
621
622
623
624 if (i >= 1 && ((!nvdimm && cmd >= ND_CMD_ARS_CAP
625 && cmd <= ND_CMD_CLEAR_ERROR)
626 || (nvdimm && cmd >= ND_CMD_SMART
627 && cmd <= ND_CMD_VENDOR)))
628 fw_status = *(u32 *) out_obj->buffer.pointer;
629
630 if (offset + in_buf.buffer.length < buf_len) {
631 if (i >= 1) {
632
633
634
635
636 rc = buf_len - offset - in_buf.buffer.length;
637 if (cmd_rc)
638 *cmd_rc = xlat_status(nvdimm, buf, cmd,
639 fw_status);
640 } else {
641 dev_err(dev, "%s:%s underrun cmd: %s buf_len: %d out_len: %d\n",
642 __func__, dimm_name, cmd_name, buf_len,
643 offset);
644 rc = -ENXIO;
645 }
646 } else {
647 rc = 0;
648 if (cmd_rc)
649 *cmd_rc = xlat_status(nvdimm, buf, cmd, fw_status);
650 }
651
652 out:
653 ACPI_FREE(out_obj);
654
655 return rc;
656}
657EXPORT_SYMBOL_GPL(acpi_nfit_ctl);
658
659static const char *spa_type_name(u16 type)
660{
661 static const char *to_name[] = {
662 [NFIT_SPA_VOLATILE] = "volatile",
663 [NFIT_SPA_PM] = "pmem",
664 [NFIT_SPA_DCR] = "dimm-control-region",
665 [NFIT_SPA_BDW] = "block-data-window",
666 [NFIT_SPA_VDISK] = "volatile-disk",
667 [NFIT_SPA_VCD] = "volatile-cd",
668 [NFIT_SPA_PDISK] = "persistent-disk",
669 [NFIT_SPA_PCD] = "persistent-cd",
670
671 };
672
673 if (type > NFIT_SPA_PCD)
674 return "unknown";
675
676 return to_name[type];
677}
678
679int nfit_spa_type(struct acpi_nfit_system_address *spa)
680{
681 int i;
682
683 for (i = 0; i < NFIT_UUID_MAX; i++)
684 if (guid_equal(to_nfit_uuid(i), (guid_t *)&spa->range_guid))
685 return i;
686 return -1;
687}
688
689static size_t sizeof_spa(struct acpi_nfit_system_address *spa)
690{
691 if (spa->flags & ACPI_NFIT_LOCATION_COOKIE_VALID)
692 return sizeof(*spa);
693 return sizeof(*spa) - 8;
694}
695
696static bool add_spa(struct acpi_nfit_desc *acpi_desc,
697 struct nfit_table_prev *prev,
698 struct acpi_nfit_system_address *spa)
699{
700 struct device *dev = acpi_desc->dev;
701 struct nfit_spa *nfit_spa;
702
703 if (spa->header.length != sizeof_spa(spa))
704 return false;
705
706 list_for_each_entry(nfit_spa, &prev->spas, list) {
707 if (memcmp(nfit_spa->spa, spa, sizeof_spa(spa)) == 0) {
708 list_move_tail(&nfit_spa->list, &acpi_desc->spas);
709 return true;
710 }
711 }
712
713 nfit_spa = devm_kzalloc(dev, sizeof(*nfit_spa) + sizeof_spa(spa),
714 GFP_KERNEL);
715 if (!nfit_spa)
716 return false;
717 INIT_LIST_HEAD(&nfit_spa->list);
718 memcpy(nfit_spa->spa, spa, sizeof_spa(spa));
719 list_add_tail(&nfit_spa->list, &acpi_desc->spas);
720 dev_dbg(dev, "spa index: %d type: %s\n",
721 spa->range_index,
722 spa_type_name(nfit_spa_type(spa)));
723 return true;
724}
725
726static bool add_memdev(struct acpi_nfit_desc *acpi_desc,
727 struct nfit_table_prev *prev,
728 struct acpi_nfit_memory_map *memdev)
729{
730 struct device *dev = acpi_desc->dev;
731 struct nfit_memdev *nfit_memdev;
732
733 if (memdev->header.length != sizeof(*memdev))
734 return false;
735
736 list_for_each_entry(nfit_memdev, &prev->memdevs, list)
737 if (memcmp(nfit_memdev->memdev, memdev, sizeof(*memdev)) == 0) {
738 list_move_tail(&nfit_memdev->list, &acpi_desc->memdevs);
739 return true;
740 }
741
742 nfit_memdev = devm_kzalloc(dev, sizeof(*nfit_memdev) + sizeof(*memdev),
743 GFP_KERNEL);
744 if (!nfit_memdev)
745 return false;
746 INIT_LIST_HEAD(&nfit_memdev->list);
747 memcpy(nfit_memdev->memdev, memdev, sizeof(*memdev));
748 list_add_tail(&nfit_memdev->list, &acpi_desc->memdevs);
749 dev_dbg(dev, "memdev handle: %#x spa: %d dcr: %d flags: %#x\n",
750 memdev->device_handle, memdev->range_index,
751 memdev->region_index, memdev->flags);
752 return true;
753}
754
755int nfit_get_smbios_id(u32 device_handle, u16 *flags)
756{
757 struct acpi_nfit_memory_map *memdev;
758 struct acpi_nfit_desc *acpi_desc;
759 struct nfit_mem *nfit_mem;
760 u16 physical_id;
761
762 mutex_lock(&acpi_desc_lock);
763 list_for_each_entry(acpi_desc, &acpi_descs, list) {
764 mutex_lock(&acpi_desc->init_mutex);
765 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
766 memdev = __to_nfit_memdev(nfit_mem);
767 if (memdev->device_handle == device_handle) {
768 *flags = memdev->flags;
769 physical_id = memdev->physical_id;
770 mutex_unlock(&acpi_desc->init_mutex);
771 mutex_unlock(&acpi_desc_lock);
772 return physical_id;
773 }
774 }
775 mutex_unlock(&acpi_desc->init_mutex);
776 }
777 mutex_unlock(&acpi_desc_lock);
778
779 return -ENODEV;
780}
781EXPORT_SYMBOL_GPL(nfit_get_smbios_id);
782
783
784
785
786
787static size_t sizeof_dcr(struct acpi_nfit_control_region *dcr)
788{
789 if (dcr->header.length < offsetof(struct acpi_nfit_control_region,
790 window_size))
791 return 0;
792 if (dcr->windows)
793 return sizeof(*dcr);
794 return offsetof(struct acpi_nfit_control_region, window_size);
795}
796
797static bool add_dcr(struct acpi_nfit_desc *acpi_desc,
798 struct nfit_table_prev *prev,
799 struct acpi_nfit_control_region *dcr)
800{
801 struct device *dev = acpi_desc->dev;
802 struct nfit_dcr *nfit_dcr;
803
804 if (!sizeof_dcr(dcr))
805 return false;
806
807 list_for_each_entry(nfit_dcr, &prev->dcrs, list)
808 if (memcmp(nfit_dcr->dcr, dcr, sizeof_dcr(dcr)) == 0) {
809 list_move_tail(&nfit_dcr->list, &acpi_desc->dcrs);
810 return true;
811 }
812
813 nfit_dcr = devm_kzalloc(dev, sizeof(*nfit_dcr) + sizeof(*dcr),
814 GFP_KERNEL);
815 if (!nfit_dcr)
816 return false;
817 INIT_LIST_HEAD(&nfit_dcr->list);
818 memcpy(nfit_dcr->dcr, dcr, sizeof_dcr(dcr));
819 list_add_tail(&nfit_dcr->list, &acpi_desc->dcrs);
820 dev_dbg(dev, "dcr index: %d windows: %d\n",
821 dcr->region_index, dcr->windows);
822 return true;
823}
824
825static bool add_bdw(struct acpi_nfit_desc *acpi_desc,
826 struct nfit_table_prev *prev,
827 struct acpi_nfit_data_region *bdw)
828{
829 struct device *dev = acpi_desc->dev;
830 struct nfit_bdw *nfit_bdw;
831
832 if (bdw->header.length != sizeof(*bdw))
833 return false;
834 list_for_each_entry(nfit_bdw, &prev->bdws, list)
835 if (memcmp(nfit_bdw->bdw, bdw, sizeof(*bdw)) == 0) {
836 list_move_tail(&nfit_bdw->list, &acpi_desc->bdws);
837 return true;
838 }
839
840 nfit_bdw = devm_kzalloc(dev, sizeof(*nfit_bdw) + sizeof(*bdw),
841 GFP_KERNEL);
842 if (!nfit_bdw)
843 return false;
844 INIT_LIST_HEAD(&nfit_bdw->list);
845 memcpy(nfit_bdw->bdw, bdw, sizeof(*bdw));
846 list_add_tail(&nfit_bdw->list, &acpi_desc->bdws);
847 dev_dbg(dev, "bdw dcr: %d windows: %d\n",
848 bdw->region_index, bdw->windows);
849 return true;
850}
851
852static size_t sizeof_idt(struct acpi_nfit_interleave *idt)
853{
854 if (idt->header.length < sizeof(*idt))
855 return 0;
856 return sizeof(*idt) + sizeof(u32) * (idt->line_count - 1);
857}
858
859static bool add_idt(struct acpi_nfit_desc *acpi_desc,
860 struct nfit_table_prev *prev,
861 struct acpi_nfit_interleave *idt)
862{
863 struct device *dev = acpi_desc->dev;
864 struct nfit_idt *nfit_idt;
865
866 if (!sizeof_idt(idt))
867 return false;
868
869 list_for_each_entry(nfit_idt, &prev->idts, list) {
870 if (sizeof_idt(nfit_idt->idt) != sizeof_idt(idt))
871 continue;
872
873 if (memcmp(nfit_idt->idt, idt, sizeof_idt(idt)) == 0) {
874 list_move_tail(&nfit_idt->list, &acpi_desc->idts);
875 return true;
876 }
877 }
878
879 nfit_idt = devm_kzalloc(dev, sizeof(*nfit_idt) + sizeof_idt(idt),
880 GFP_KERNEL);
881 if (!nfit_idt)
882 return false;
883 INIT_LIST_HEAD(&nfit_idt->list);
884 memcpy(nfit_idt->idt, idt, sizeof_idt(idt));
885 list_add_tail(&nfit_idt->list, &acpi_desc->idts);
886 dev_dbg(dev, "idt index: %d num_lines: %d\n",
887 idt->interleave_index, idt->line_count);
888 return true;
889}
890
891static size_t sizeof_flush(struct acpi_nfit_flush_address *flush)
892{
893 if (flush->header.length < sizeof(*flush))
894 return 0;
895 return sizeof(*flush) + sizeof(u64) * (flush->hint_count - 1);
896}
897
898static bool add_flush(struct acpi_nfit_desc *acpi_desc,
899 struct nfit_table_prev *prev,
900 struct acpi_nfit_flush_address *flush)
901{
902 struct device *dev = acpi_desc->dev;
903 struct nfit_flush *nfit_flush;
904
905 if (!sizeof_flush(flush))
906 return false;
907
908 list_for_each_entry(nfit_flush, &prev->flushes, list) {
909 if (sizeof_flush(nfit_flush->flush) != sizeof_flush(flush))
910 continue;
911
912 if (memcmp(nfit_flush->flush, flush,
913 sizeof_flush(flush)) == 0) {
914 list_move_tail(&nfit_flush->list, &acpi_desc->flushes);
915 return true;
916 }
917 }
918
919 nfit_flush = devm_kzalloc(dev, sizeof(*nfit_flush)
920 + sizeof_flush(flush), GFP_KERNEL);
921 if (!nfit_flush)
922 return false;
923 INIT_LIST_HEAD(&nfit_flush->list);
924 memcpy(nfit_flush->flush, flush, sizeof_flush(flush));
925 list_add_tail(&nfit_flush->list, &acpi_desc->flushes);
926 dev_dbg(dev, "nfit_flush handle: %d hint_count: %d\n",
927 flush->device_handle, flush->hint_count);
928 return true;
929}
930
931static bool add_platform_cap(struct acpi_nfit_desc *acpi_desc,
932 struct acpi_nfit_capabilities *pcap)
933{
934 struct device *dev = acpi_desc->dev;
935 u32 mask;
936
937 mask = (1 << (pcap->highest_capability + 1)) - 1;
938 acpi_desc->platform_cap = pcap->capabilities & mask;
939 dev_dbg(dev, "cap: %#x\n", acpi_desc->platform_cap);
940 return true;
941}
942
943static void *add_table(struct acpi_nfit_desc *acpi_desc,
944 struct nfit_table_prev *prev, void *table, const void *end)
945{
946 struct device *dev = acpi_desc->dev;
947 struct acpi_nfit_header *hdr;
948 void *err = ERR_PTR(-ENOMEM);
949
950 if (table >= end)
951 return NULL;
952
953 hdr = table;
954 if (!hdr->length) {
955 dev_warn(dev, "found a zero length table '%d' parsing nfit\n",
956 hdr->type);
957 return NULL;
958 }
959
960 switch (hdr->type) {
961 case ACPI_NFIT_TYPE_SYSTEM_ADDRESS:
962 if (!add_spa(acpi_desc, prev, table))
963 return err;
964 break;
965 case ACPI_NFIT_TYPE_MEMORY_MAP:
966 if (!add_memdev(acpi_desc, prev, table))
967 return err;
968 break;
969 case ACPI_NFIT_TYPE_CONTROL_REGION:
970 if (!add_dcr(acpi_desc, prev, table))
971 return err;
972 break;
973 case ACPI_NFIT_TYPE_DATA_REGION:
974 if (!add_bdw(acpi_desc, prev, table))
975 return err;
976 break;
977 case ACPI_NFIT_TYPE_INTERLEAVE:
978 if (!add_idt(acpi_desc, prev, table))
979 return err;
980 break;
981 case ACPI_NFIT_TYPE_FLUSH_ADDRESS:
982 if (!add_flush(acpi_desc, prev, table))
983 return err;
984 break;
985 case ACPI_NFIT_TYPE_SMBIOS:
986 dev_dbg(dev, "smbios\n");
987 break;
988 case ACPI_NFIT_TYPE_CAPABILITIES:
989 if (!add_platform_cap(acpi_desc, table))
990 return err;
991 break;
992 default:
993 dev_err(dev, "unknown table '%d' parsing nfit\n", hdr->type);
994 break;
995 }
996
997 return table + hdr->length;
998}
999
1000static void nfit_mem_find_spa_bdw(struct acpi_nfit_desc *acpi_desc,
1001 struct nfit_mem *nfit_mem)
1002{
1003 u32 device_handle = __to_nfit_memdev(nfit_mem)->device_handle;
1004 u16 dcr = nfit_mem->dcr->region_index;
1005 struct nfit_spa *nfit_spa;
1006
1007 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
1008 u16 range_index = nfit_spa->spa->range_index;
1009 int type = nfit_spa_type(nfit_spa->spa);
1010 struct nfit_memdev *nfit_memdev;
1011
1012 if (type != NFIT_SPA_BDW)
1013 continue;
1014
1015 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
1016 if (nfit_memdev->memdev->range_index != range_index)
1017 continue;
1018 if (nfit_memdev->memdev->device_handle != device_handle)
1019 continue;
1020 if (nfit_memdev->memdev->region_index != dcr)
1021 continue;
1022
1023 nfit_mem->spa_bdw = nfit_spa->spa;
1024 return;
1025 }
1026 }
1027
1028 dev_dbg(acpi_desc->dev, "SPA-BDW not found for SPA-DCR %d\n",
1029 nfit_mem->spa_dcr->range_index);
1030 nfit_mem->bdw = NULL;
1031}
1032
1033static void nfit_mem_init_bdw(struct acpi_nfit_desc *acpi_desc,
1034 struct nfit_mem *nfit_mem, struct acpi_nfit_system_address *spa)
1035{
1036 u16 dcr = __to_nfit_memdev(nfit_mem)->region_index;
1037 struct nfit_memdev *nfit_memdev;
1038 struct nfit_bdw *nfit_bdw;
1039 struct nfit_idt *nfit_idt;
1040 u16 idt_idx, range_index;
1041
1042 list_for_each_entry(nfit_bdw, &acpi_desc->bdws, list) {
1043 if (nfit_bdw->bdw->region_index != dcr)
1044 continue;
1045 nfit_mem->bdw = nfit_bdw->bdw;
1046 break;
1047 }
1048
1049 if (!nfit_mem->bdw)
1050 return;
1051
1052 nfit_mem_find_spa_bdw(acpi_desc, nfit_mem);
1053
1054 if (!nfit_mem->spa_bdw)
1055 return;
1056
1057 range_index = nfit_mem->spa_bdw->range_index;
1058 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
1059 if (nfit_memdev->memdev->range_index != range_index ||
1060 nfit_memdev->memdev->region_index != dcr)
1061 continue;
1062 nfit_mem->memdev_bdw = nfit_memdev->memdev;
1063 idt_idx = nfit_memdev->memdev->interleave_index;
1064 list_for_each_entry(nfit_idt, &acpi_desc->idts, list) {
1065 if (nfit_idt->idt->interleave_index != idt_idx)
1066 continue;
1067 nfit_mem->idt_bdw = nfit_idt->idt;
1068 break;
1069 }
1070 break;
1071 }
1072}
1073
1074static int __nfit_mem_init(struct acpi_nfit_desc *acpi_desc,
1075 struct acpi_nfit_system_address *spa)
1076{
1077 struct nfit_mem *nfit_mem, *found;
1078 struct nfit_memdev *nfit_memdev;
1079 int type = spa ? nfit_spa_type(spa) : 0;
1080
1081 switch (type) {
1082 case NFIT_SPA_DCR:
1083 case NFIT_SPA_PM:
1084 break;
1085 default:
1086 if (spa)
1087 return 0;
1088 }
1089
1090
1091
1092
1093
1094
1095
1096
1097 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
1098 struct nfit_flush *nfit_flush;
1099 struct nfit_dcr *nfit_dcr;
1100 u32 device_handle;
1101 u16 dcr;
1102
1103 if (spa && nfit_memdev->memdev->range_index != spa->range_index)
1104 continue;
1105 if (!spa && nfit_memdev->memdev->range_index)
1106 continue;
1107 found = NULL;
1108 dcr = nfit_memdev->memdev->region_index;
1109 device_handle = nfit_memdev->memdev->device_handle;
1110 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list)
1111 if (__to_nfit_memdev(nfit_mem)->device_handle
1112 == device_handle) {
1113 found = nfit_mem;
1114 break;
1115 }
1116
1117 if (found)
1118 nfit_mem = found;
1119 else {
1120 nfit_mem = devm_kzalloc(acpi_desc->dev,
1121 sizeof(*nfit_mem), GFP_KERNEL);
1122 if (!nfit_mem)
1123 return -ENOMEM;
1124 INIT_LIST_HEAD(&nfit_mem->list);
1125 nfit_mem->acpi_desc = acpi_desc;
1126 list_add(&nfit_mem->list, &acpi_desc->dimms);
1127 }
1128
1129 list_for_each_entry(nfit_dcr, &acpi_desc->dcrs, list) {
1130 if (nfit_dcr->dcr->region_index != dcr)
1131 continue;
1132
1133
1134
1135
1136
1137
1138
1139 if (!nfit_mem->dcr)
1140 nfit_mem->dcr = nfit_dcr->dcr;
1141 else if (nfit_mem->dcr->windows == 0
1142 && nfit_dcr->dcr->windows)
1143 nfit_mem->dcr = nfit_dcr->dcr;
1144 break;
1145 }
1146
1147 list_for_each_entry(nfit_flush, &acpi_desc->flushes, list) {
1148 struct acpi_nfit_flush_address *flush;
1149 u16 i;
1150
1151 if (nfit_flush->flush->device_handle != device_handle)
1152 continue;
1153 nfit_mem->nfit_flush = nfit_flush;
1154 flush = nfit_flush->flush;
1155 nfit_mem->flush_wpq = devm_kcalloc(acpi_desc->dev,
1156 flush->hint_count,
1157 sizeof(struct resource),
1158 GFP_KERNEL);
1159 if (!nfit_mem->flush_wpq)
1160 return -ENOMEM;
1161 for (i = 0; i < flush->hint_count; i++) {
1162 struct resource *res = &nfit_mem->flush_wpq[i];
1163
1164 res->start = flush->hint_address[i];
1165 res->end = res->start + 8 - 1;
1166 }
1167 break;
1168 }
1169
1170 if (dcr && !nfit_mem->dcr) {
1171 dev_err(acpi_desc->dev, "SPA %d missing DCR %d\n",
1172 spa->range_index, dcr);
1173 return -ENODEV;
1174 }
1175
1176 if (type == NFIT_SPA_DCR) {
1177 struct nfit_idt *nfit_idt;
1178 u16 idt_idx;
1179
1180
1181 nfit_mem->spa_dcr = spa;
1182 nfit_mem->memdev_dcr = nfit_memdev->memdev;
1183 idt_idx = nfit_memdev->memdev->interleave_index;
1184 list_for_each_entry(nfit_idt, &acpi_desc->idts, list) {
1185 if (nfit_idt->idt->interleave_index != idt_idx)
1186 continue;
1187 nfit_mem->idt_dcr = nfit_idt->idt;
1188 break;
1189 }
1190 nfit_mem_init_bdw(acpi_desc, nfit_mem, spa);
1191 } else if (type == NFIT_SPA_PM) {
1192
1193
1194
1195
1196
1197 nfit_mem->memdev_pmem = nfit_memdev->memdev;
1198 } else
1199 nfit_mem->memdev_dcr = nfit_memdev->memdev;
1200 }
1201
1202 return 0;
1203}
1204
1205static int nfit_mem_cmp(void *priv, const struct list_head *_a,
1206 const struct list_head *_b)
1207{
1208 struct nfit_mem *a = container_of(_a, typeof(*a), list);
1209 struct nfit_mem *b = container_of(_b, typeof(*b), list);
1210 u32 handleA, handleB;
1211
1212 handleA = __to_nfit_memdev(a)->device_handle;
1213 handleB = __to_nfit_memdev(b)->device_handle;
1214 if (handleA < handleB)
1215 return -1;
1216 else if (handleA > handleB)
1217 return 1;
1218 return 0;
1219}
1220
1221static int nfit_mem_init(struct acpi_nfit_desc *acpi_desc)
1222{
1223 struct nfit_spa *nfit_spa;
1224 int rc;
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
1236 rc = __nfit_mem_init(acpi_desc, nfit_spa->spa);
1237 if (rc)
1238 return rc;
1239 }
1240
1241
1242
1243
1244
1245
1246 rc = __nfit_mem_init(acpi_desc, NULL);
1247 if (rc)
1248 return rc;
1249
1250 list_sort(NULL, &acpi_desc->dimms, nfit_mem_cmp);
1251
1252 return 0;
1253}
1254
1255static ssize_t bus_dsm_mask_show(struct device *dev,
1256 struct device_attribute *attr, char *buf)
1257{
1258 struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
1259 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
1260 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1261
1262 return sprintf(buf, "%#lx\n", acpi_desc->bus_dsm_mask);
1263}
1264static struct device_attribute dev_attr_bus_dsm_mask =
1265 __ATTR(dsm_mask, 0444, bus_dsm_mask_show, NULL);
1266
1267static ssize_t revision_show(struct device *dev,
1268 struct device_attribute *attr, char *buf)
1269{
1270 struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
1271 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
1272 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1273
1274 return sprintf(buf, "%d\n", acpi_desc->acpi_header.revision);
1275}
1276static DEVICE_ATTR_RO(revision);
1277
1278static ssize_t hw_error_scrub_show(struct device *dev,
1279 struct device_attribute *attr, char *buf)
1280{
1281 struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
1282 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
1283 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1284
1285 return sprintf(buf, "%d\n", acpi_desc->scrub_mode);
1286}
1287
1288
1289
1290
1291
1292
1293
1294
1295static ssize_t hw_error_scrub_store(struct device *dev,
1296 struct device_attribute *attr, const char *buf, size_t size)
1297{
1298 struct nvdimm_bus_descriptor *nd_desc;
1299 ssize_t rc;
1300 long val;
1301
1302 rc = kstrtol(buf, 0, &val);
1303 if (rc)
1304 return rc;
1305
1306 nfit_device_lock(dev);
1307 nd_desc = dev_get_drvdata(dev);
1308 if (nd_desc) {
1309 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1310
1311 switch (val) {
1312 case HW_ERROR_SCRUB_ON:
1313 acpi_desc->scrub_mode = HW_ERROR_SCRUB_ON;
1314 break;
1315 case HW_ERROR_SCRUB_OFF:
1316 acpi_desc->scrub_mode = HW_ERROR_SCRUB_OFF;
1317 break;
1318 default:
1319 rc = -EINVAL;
1320 break;
1321 }
1322 }
1323 nfit_device_unlock(dev);
1324 if (rc)
1325 return rc;
1326 return size;
1327}
1328static DEVICE_ATTR_RW(hw_error_scrub);
1329
1330
1331
1332
1333
1334
1335static ssize_t scrub_show(struct device *dev,
1336 struct device_attribute *attr, char *buf)
1337{
1338 struct nvdimm_bus_descriptor *nd_desc;
1339 struct acpi_nfit_desc *acpi_desc;
1340 ssize_t rc = -ENXIO;
1341 bool busy;
1342
1343 nfit_device_lock(dev);
1344 nd_desc = dev_get_drvdata(dev);
1345 if (!nd_desc) {
1346 nfit_device_unlock(dev);
1347 return rc;
1348 }
1349 acpi_desc = to_acpi_desc(nd_desc);
1350
1351 mutex_lock(&acpi_desc->init_mutex);
1352 busy = test_bit(ARS_BUSY, &acpi_desc->scrub_flags)
1353 && !test_bit(ARS_CANCEL, &acpi_desc->scrub_flags);
1354 rc = sprintf(buf, "%d%s", acpi_desc->scrub_count, busy ? "+\n" : "\n");
1355
1356 if (busy && capable(CAP_SYS_RAWIO) && !test_and_set_bit(ARS_POLL,
1357 &acpi_desc->scrub_flags)) {
1358 acpi_desc->scrub_tmo = 1;
1359 mod_delayed_work(nfit_wq, &acpi_desc->dwork, HZ);
1360 }
1361
1362 mutex_unlock(&acpi_desc->init_mutex);
1363 nfit_device_unlock(dev);
1364 return rc;
1365}
1366
1367static ssize_t scrub_store(struct device *dev,
1368 struct device_attribute *attr, const char *buf, size_t size)
1369{
1370 struct nvdimm_bus_descriptor *nd_desc;
1371 ssize_t rc;
1372 long val;
1373
1374 rc = kstrtol(buf, 0, &val);
1375 if (rc)
1376 return rc;
1377 if (val != 1)
1378 return -EINVAL;
1379
1380 nfit_device_lock(dev);
1381 nd_desc = dev_get_drvdata(dev);
1382 if (nd_desc) {
1383 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1384
1385 rc = acpi_nfit_ars_rescan(acpi_desc, ARS_REQ_LONG);
1386 }
1387 nfit_device_unlock(dev);
1388 if (rc)
1389 return rc;
1390 return size;
1391}
1392static DEVICE_ATTR_RW(scrub);
1393
1394static bool ars_supported(struct nvdimm_bus *nvdimm_bus)
1395{
1396 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
1397 const unsigned long mask = 1 << ND_CMD_ARS_CAP | 1 << ND_CMD_ARS_START
1398 | 1 << ND_CMD_ARS_STATUS;
1399
1400 return (nd_desc->cmd_mask & mask) == mask;
1401}
1402
1403static umode_t nfit_visible(struct kobject *kobj, struct attribute *a, int n)
1404{
1405 struct device *dev = kobj_to_dev(kobj);
1406 struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
1407
1408 if (a == &dev_attr_scrub.attr)
1409 return ars_supported(nvdimm_bus) ? a->mode : 0;
1410
1411 if (a == &dev_attr_firmware_activate_noidle.attr)
1412 return intel_fwa_supported(nvdimm_bus) ? a->mode : 0;
1413
1414 return a->mode;
1415}
1416
1417static struct attribute *acpi_nfit_attributes[] = {
1418 &dev_attr_revision.attr,
1419 &dev_attr_scrub.attr,
1420 &dev_attr_hw_error_scrub.attr,
1421 &dev_attr_bus_dsm_mask.attr,
1422 &dev_attr_firmware_activate_noidle.attr,
1423 NULL,
1424};
1425
1426static const struct attribute_group acpi_nfit_attribute_group = {
1427 .name = "nfit",
1428 .attrs = acpi_nfit_attributes,
1429 .is_visible = nfit_visible,
1430};
1431
1432static const struct attribute_group *acpi_nfit_attribute_groups[] = {
1433 &acpi_nfit_attribute_group,
1434 NULL,
1435};
1436
1437static struct acpi_nfit_memory_map *to_nfit_memdev(struct device *dev)
1438{
1439 struct nvdimm *nvdimm = to_nvdimm(dev);
1440 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1441
1442 return __to_nfit_memdev(nfit_mem);
1443}
1444
1445static struct acpi_nfit_control_region *to_nfit_dcr(struct device *dev)
1446{
1447 struct nvdimm *nvdimm = to_nvdimm(dev);
1448 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1449
1450 return nfit_mem->dcr;
1451}
1452
1453static ssize_t handle_show(struct device *dev,
1454 struct device_attribute *attr, char *buf)
1455{
1456 struct acpi_nfit_memory_map *memdev = to_nfit_memdev(dev);
1457
1458 return sprintf(buf, "%#x\n", memdev->device_handle);
1459}
1460static DEVICE_ATTR_RO(handle);
1461
1462static ssize_t phys_id_show(struct device *dev,
1463 struct device_attribute *attr, char *buf)
1464{
1465 struct acpi_nfit_memory_map *memdev = to_nfit_memdev(dev);
1466
1467 return sprintf(buf, "%#x\n", memdev->physical_id);
1468}
1469static DEVICE_ATTR_RO(phys_id);
1470
1471static ssize_t vendor_show(struct device *dev,
1472 struct device_attribute *attr, char *buf)
1473{
1474 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1475
1476 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->vendor_id));
1477}
1478static DEVICE_ATTR_RO(vendor);
1479
1480static ssize_t rev_id_show(struct device *dev,
1481 struct device_attribute *attr, char *buf)
1482{
1483 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1484
1485 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->revision_id));
1486}
1487static DEVICE_ATTR_RO(rev_id);
1488
1489static ssize_t device_show(struct device *dev,
1490 struct device_attribute *attr, char *buf)
1491{
1492 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1493
1494 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->device_id));
1495}
1496static DEVICE_ATTR_RO(device);
1497
1498static ssize_t subsystem_vendor_show(struct device *dev,
1499 struct device_attribute *attr, char *buf)
1500{
1501 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1502
1503 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->subsystem_vendor_id));
1504}
1505static DEVICE_ATTR_RO(subsystem_vendor);
1506
1507static ssize_t subsystem_rev_id_show(struct device *dev,
1508 struct device_attribute *attr, char *buf)
1509{
1510 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1511
1512 return sprintf(buf, "0x%04x\n",
1513 be16_to_cpu(dcr->subsystem_revision_id));
1514}
1515static DEVICE_ATTR_RO(subsystem_rev_id);
1516
1517static ssize_t subsystem_device_show(struct device *dev,
1518 struct device_attribute *attr, char *buf)
1519{
1520 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1521
1522 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->subsystem_device_id));
1523}
1524static DEVICE_ATTR_RO(subsystem_device);
1525
1526static int num_nvdimm_formats(struct nvdimm *nvdimm)
1527{
1528 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1529 int formats = 0;
1530
1531 if (nfit_mem->memdev_pmem)
1532 formats++;
1533 if (nfit_mem->memdev_bdw)
1534 formats++;
1535 return formats;
1536}
1537
1538static ssize_t format_show(struct device *dev,
1539 struct device_attribute *attr, char *buf)
1540{
1541 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1542
1543 return sprintf(buf, "0x%04x\n", le16_to_cpu(dcr->code));
1544}
1545static DEVICE_ATTR_RO(format);
1546
1547static ssize_t format1_show(struct device *dev,
1548 struct device_attribute *attr, char *buf)
1549{
1550 u32 handle;
1551 ssize_t rc = -ENXIO;
1552 struct nfit_mem *nfit_mem;
1553 struct nfit_memdev *nfit_memdev;
1554 struct acpi_nfit_desc *acpi_desc;
1555 struct nvdimm *nvdimm = to_nvdimm(dev);
1556 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1557
1558 nfit_mem = nvdimm_provider_data(nvdimm);
1559 acpi_desc = nfit_mem->acpi_desc;
1560 handle = to_nfit_memdev(dev)->device_handle;
1561
1562
1563 mutex_lock(&acpi_desc->init_mutex);
1564 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
1565 struct acpi_nfit_memory_map *memdev = nfit_memdev->memdev;
1566 struct nfit_dcr *nfit_dcr;
1567
1568 if (memdev->device_handle != handle)
1569 continue;
1570
1571 list_for_each_entry(nfit_dcr, &acpi_desc->dcrs, list) {
1572 if (nfit_dcr->dcr->region_index != memdev->region_index)
1573 continue;
1574 if (nfit_dcr->dcr->code == dcr->code)
1575 continue;
1576 rc = sprintf(buf, "0x%04x\n",
1577 le16_to_cpu(nfit_dcr->dcr->code));
1578 break;
1579 }
1580 if (rc != -ENXIO)
1581 break;
1582 }
1583 mutex_unlock(&acpi_desc->init_mutex);
1584 return rc;
1585}
1586static DEVICE_ATTR_RO(format1);
1587
1588static ssize_t formats_show(struct device *dev,
1589 struct device_attribute *attr, char *buf)
1590{
1591 struct nvdimm *nvdimm = to_nvdimm(dev);
1592
1593 return sprintf(buf, "%d\n", num_nvdimm_formats(nvdimm));
1594}
1595static DEVICE_ATTR_RO(formats);
1596
1597static ssize_t serial_show(struct device *dev,
1598 struct device_attribute *attr, char *buf)
1599{
1600 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1601
1602 return sprintf(buf, "0x%08x\n", be32_to_cpu(dcr->serial_number));
1603}
1604static DEVICE_ATTR_RO(serial);
1605
1606static ssize_t family_show(struct device *dev,
1607 struct device_attribute *attr, char *buf)
1608{
1609 struct nvdimm *nvdimm = to_nvdimm(dev);
1610 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1611
1612 if (nfit_mem->family < 0)
1613 return -ENXIO;
1614 return sprintf(buf, "%d\n", nfit_mem->family);
1615}
1616static DEVICE_ATTR_RO(family);
1617
1618static ssize_t dsm_mask_show(struct device *dev,
1619 struct device_attribute *attr, char *buf)
1620{
1621 struct nvdimm *nvdimm = to_nvdimm(dev);
1622 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1623
1624 if (nfit_mem->family < 0)
1625 return -ENXIO;
1626 return sprintf(buf, "%#lx\n", nfit_mem->dsm_mask);
1627}
1628static DEVICE_ATTR_RO(dsm_mask);
1629
1630static ssize_t flags_show(struct device *dev,
1631 struct device_attribute *attr, char *buf)
1632{
1633 struct nvdimm *nvdimm = to_nvdimm(dev);
1634 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1635 u16 flags = __to_nfit_memdev(nfit_mem)->flags;
1636
1637 if (test_bit(NFIT_MEM_DIRTY, &nfit_mem->flags))
1638 flags |= ACPI_NFIT_MEM_FLUSH_FAILED;
1639
1640 return sprintf(buf, "%s%s%s%s%s%s%s\n",
1641 flags & ACPI_NFIT_MEM_SAVE_FAILED ? "save_fail " : "",
1642 flags & ACPI_NFIT_MEM_RESTORE_FAILED ? "restore_fail " : "",
1643 flags & ACPI_NFIT_MEM_FLUSH_FAILED ? "flush_fail " : "",
1644 flags & ACPI_NFIT_MEM_NOT_ARMED ? "not_armed " : "",
1645 flags & ACPI_NFIT_MEM_HEALTH_OBSERVED ? "smart_event " : "",
1646 flags & ACPI_NFIT_MEM_MAP_FAILED ? "map_fail " : "",
1647 flags & ACPI_NFIT_MEM_HEALTH_ENABLED ? "smart_notify " : "");
1648}
1649static DEVICE_ATTR_RO(flags);
1650
1651static ssize_t id_show(struct device *dev,
1652 struct device_attribute *attr, char *buf)
1653{
1654 struct nvdimm *nvdimm = to_nvdimm(dev);
1655 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1656
1657 return sprintf(buf, "%s\n", nfit_mem->id);
1658}
1659static DEVICE_ATTR_RO(id);
1660
1661static ssize_t dirty_shutdown_show(struct device *dev,
1662 struct device_attribute *attr, char *buf)
1663{
1664 struct nvdimm *nvdimm = to_nvdimm(dev);
1665 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1666
1667 return sprintf(buf, "%d\n", nfit_mem->dirty_shutdown);
1668}
1669static DEVICE_ATTR_RO(dirty_shutdown);
1670
1671static struct attribute *acpi_nfit_dimm_attributes[] = {
1672 &dev_attr_handle.attr,
1673 &dev_attr_phys_id.attr,
1674 &dev_attr_vendor.attr,
1675 &dev_attr_device.attr,
1676 &dev_attr_rev_id.attr,
1677 &dev_attr_subsystem_vendor.attr,
1678 &dev_attr_subsystem_device.attr,
1679 &dev_attr_subsystem_rev_id.attr,
1680 &dev_attr_format.attr,
1681 &dev_attr_formats.attr,
1682 &dev_attr_format1.attr,
1683 &dev_attr_serial.attr,
1684 &dev_attr_flags.attr,
1685 &dev_attr_id.attr,
1686 &dev_attr_family.attr,
1687 &dev_attr_dsm_mask.attr,
1688 &dev_attr_dirty_shutdown.attr,
1689 NULL,
1690};
1691
1692static umode_t acpi_nfit_dimm_attr_visible(struct kobject *kobj,
1693 struct attribute *a, int n)
1694{
1695 struct device *dev = kobj_to_dev(kobj);
1696 struct nvdimm *nvdimm = to_nvdimm(dev);
1697 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1698
1699 if (!to_nfit_dcr(dev)) {
1700
1701 if (a == &dev_attr_handle.attr || a == &dev_attr_phys_id.attr
1702 || a == &dev_attr_flags.attr
1703 || a == &dev_attr_family.attr
1704 || a == &dev_attr_dsm_mask.attr)
1705 return a->mode;
1706 return 0;
1707 }
1708
1709 if (a == &dev_attr_format1.attr && num_nvdimm_formats(nvdimm) <= 1)
1710 return 0;
1711
1712 if (!test_bit(NFIT_MEM_DIRTY_COUNT, &nfit_mem->flags)
1713 && a == &dev_attr_dirty_shutdown.attr)
1714 return 0;
1715
1716 return a->mode;
1717}
1718
1719static const struct attribute_group acpi_nfit_dimm_attribute_group = {
1720 .name = "nfit",
1721 .attrs = acpi_nfit_dimm_attributes,
1722 .is_visible = acpi_nfit_dimm_attr_visible,
1723};
1724
1725static const struct attribute_group *acpi_nfit_dimm_attribute_groups[] = {
1726 &acpi_nfit_dimm_attribute_group,
1727 NULL,
1728};
1729
1730static struct nvdimm *acpi_nfit_dimm_by_handle(struct acpi_nfit_desc *acpi_desc,
1731 u32 device_handle)
1732{
1733 struct nfit_mem *nfit_mem;
1734
1735 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list)
1736 if (__to_nfit_memdev(nfit_mem)->device_handle == device_handle)
1737 return nfit_mem->nvdimm;
1738
1739 return NULL;
1740}
1741
1742void __acpi_nvdimm_notify(struct device *dev, u32 event)
1743{
1744 struct nfit_mem *nfit_mem;
1745 struct acpi_nfit_desc *acpi_desc;
1746
1747 dev_dbg(dev->parent, "%s: event: %d\n", dev_name(dev),
1748 event);
1749
1750 if (event != NFIT_NOTIFY_DIMM_HEALTH) {
1751 dev_dbg(dev->parent, "%s: unknown event: %d\n", dev_name(dev),
1752 event);
1753 return;
1754 }
1755
1756 acpi_desc = dev_get_drvdata(dev->parent);
1757 if (!acpi_desc)
1758 return;
1759
1760
1761
1762
1763
1764 nfit_mem = dev_get_drvdata(dev);
1765 if (nfit_mem && nfit_mem->flags_attr)
1766 sysfs_notify_dirent(nfit_mem->flags_attr);
1767}
1768EXPORT_SYMBOL_GPL(__acpi_nvdimm_notify);
1769
1770static void acpi_nvdimm_notify(acpi_handle handle, u32 event, void *data)
1771{
1772 struct acpi_device *adev = data;
1773 struct device *dev = &adev->dev;
1774
1775 nfit_device_lock(dev->parent);
1776 __acpi_nvdimm_notify(dev, event);
1777 nfit_device_unlock(dev->parent);
1778}
1779
1780static bool acpi_nvdimm_has_method(struct acpi_device *adev, char *method)
1781{
1782 acpi_handle handle;
1783 acpi_status status;
1784
1785 status = acpi_get_handle(adev->handle, method, &handle);
1786
1787 if (ACPI_SUCCESS(status))
1788 return true;
1789 return false;
1790}
1791
1792__weak void nfit_intel_shutdown_status(struct nfit_mem *nfit_mem)
1793{
1794 struct device *dev = &nfit_mem->adev->dev;
1795 struct nd_intel_smart smart = { 0 };
1796 union acpi_object in_buf = {
1797 .buffer.type = ACPI_TYPE_BUFFER,
1798 .buffer.length = 0,
1799 };
1800 union acpi_object in_obj = {
1801 .package.type = ACPI_TYPE_PACKAGE,
1802 .package.count = 1,
1803 .package.elements = &in_buf,
1804 };
1805 const u8 func = ND_INTEL_SMART;
1806 const guid_t *guid = to_nfit_uuid(nfit_mem->family);
1807 u8 revid = nfit_dsm_revid(nfit_mem->family, func);
1808 struct acpi_device *adev = nfit_mem->adev;
1809 acpi_handle handle = adev->handle;
1810 union acpi_object *out_obj;
1811
1812 if ((nfit_mem->dsm_mask & (1 << func)) == 0)
1813 return;
1814
1815 out_obj = acpi_evaluate_dsm(handle, guid, revid, func, &in_obj);
1816 if (!out_obj || out_obj->type != ACPI_TYPE_BUFFER
1817 || out_obj->buffer.length < sizeof(smart)) {
1818 dev_dbg(dev->parent, "%s: failed to retrieve initial health\n",
1819 dev_name(dev));
1820 ACPI_FREE(out_obj);
1821 return;
1822 }
1823 memcpy(&smart, out_obj->buffer.pointer, sizeof(smart));
1824 ACPI_FREE(out_obj);
1825
1826 if (smart.flags & ND_INTEL_SMART_SHUTDOWN_VALID) {
1827 if (smart.shutdown_state)
1828 set_bit(NFIT_MEM_DIRTY, &nfit_mem->flags);
1829 }
1830
1831 if (smart.flags & ND_INTEL_SMART_SHUTDOWN_COUNT_VALID) {
1832 set_bit(NFIT_MEM_DIRTY_COUNT, &nfit_mem->flags);
1833 nfit_mem->dirty_shutdown = smart.shutdown_count;
1834 }
1835}
1836
1837static void populate_shutdown_status(struct nfit_mem *nfit_mem)
1838{
1839
1840
1841
1842
1843
1844 if (nfit_mem->family == NVDIMM_FAMILY_INTEL)
1845 nfit_intel_shutdown_status(nfit_mem);
1846}
1847
1848static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
1849 struct nfit_mem *nfit_mem, u32 device_handle)
1850{
1851 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
1852 struct acpi_device *adev, *adev_dimm;
1853 struct device *dev = acpi_desc->dev;
1854 unsigned long dsm_mask, label_mask;
1855 const guid_t *guid;
1856 int i;
1857 int family = -1;
1858 struct acpi_nfit_control_region *dcr = nfit_mem->dcr;
1859
1860
1861 nfit_mem->dsm_mask = acpi_desc->dimm_cmd_force_en;
1862 nfit_mem->family = NVDIMM_FAMILY_INTEL;
1863 set_bit(NVDIMM_FAMILY_INTEL, &nd_desc->dimm_family_mask);
1864
1865 if (dcr->valid_fields & ACPI_NFIT_CONTROL_MFG_INFO_VALID)
1866 sprintf(nfit_mem->id, "%04x-%02x-%04x-%08x",
1867 be16_to_cpu(dcr->vendor_id),
1868 dcr->manufacturing_location,
1869 be16_to_cpu(dcr->manufacturing_date),
1870 be32_to_cpu(dcr->serial_number));
1871 else
1872 sprintf(nfit_mem->id, "%04x-%08x",
1873 be16_to_cpu(dcr->vendor_id),
1874 be32_to_cpu(dcr->serial_number));
1875
1876 adev = to_acpi_dev(acpi_desc);
1877 if (!adev) {
1878
1879 populate_shutdown_status(nfit_mem);
1880 return 0;
1881 }
1882
1883 adev_dimm = acpi_find_child_device(adev, device_handle, false);
1884 nfit_mem->adev = adev_dimm;
1885 if (!adev_dimm) {
1886 dev_err(dev, "no ACPI.NFIT device with _ADR %#x, disabling...\n",
1887 device_handle);
1888 return force_enable_dimms ? 0 : -ENODEV;
1889 }
1890
1891 if (ACPI_FAILURE(acpi_install_notify_handler(adev_dimm->handle,
1892 ACPI_DEVICE_NOTIFY, acpi_nvdimm_notify, adev_dimm))) {
1893 dev_err(dev, "%s: notification registration failed\n",
1894 dev_name(&adev_dimm->dev));
1895 return -ENXIO;
1896 }
1897
1898
1899
1900
1901 dev_set_drvdata(&adev_dimm->dev, nfit_mem);
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916 clear_bit(NVDIMM_FAMILY_INTEL, &nd_desc->dimm_family_mask);
1917 for (i = 0; i <= NVDIMM_FAMILY_MAX; i++)
1918 if (acpi_check_dsm(adev_dimm->handle, to_nfit_uuid(i), 1, 1)) {
1919 set_bit(i, &nd_desc->dimm_family_mask);
1920 if (family < 0 || i == default_dsm_family)
1921 family = i;
1922 }
1923
1924
1925 nfit_mem->family = family;
1926 if (override_dsm_mask && !disable_vendor_specific)
1927 dsm_mask = override_dsm_mask;
1928 else if (nfit_mem->family == NVDIMM_FAMILY_INTEL) {
1929 dsm_mask = NVDIMM_INTEL_CMDMASK;
1930 if (disable_vendor_specific)
1931 dsm_mask &= ~(1 << ND_CMD_VENDOR);
1932 } else if (nfit_mem->family == NVDIMM_FAMILY_HPE1) {
1933 dsm_mask = 0x1c3c76;
1934 } else if (nfit_mem->family == NVDIMM_FAMILY_HPE2) {
1935 dsm_mask = 0x1fe;
1936 if (disable_vendor_specific)
1937 dsm_mask &= ~(1 << 8);
1938 } else if (nfit_mem->family == NVDIMM_FAMILY_MSFT) {
1939 dsm_mask = 0xffffffff;
1940 } else if (nfit_mem->family == NVDIMM_FAMILY_HYPERV) {
1941 dsm_mask = 0x1f;
1942 } else {
1943 dev_dbg(dev, "unknown dimm command family\n");
1944 nfit_mem->family = -1;
1945
1946 return 0;
1947 }
1948
1949
1950
1951
1952
1953
1954 dsm_mask &= ~1UL;
1955
1956 guid = to_nfit_uuid(nfit_mem->family);
1957 for_each_set_bit(i, &dsm_mask, BITS_PER_LONG)
1958 if (acpi_check_dsm(adev_dimm->handle, guid,
1959 nfit_dsm_revid(nfit_mem->family, i),
1960 1ULL << i))
1961 set_bit(i, &nfit_mem->dsm_mask);
1962
1963
1964
1965
1966
1967 label_mask = 1 << ND_CMD_GET_CONFIG_SIZE | 1 << ND_CMD_GET_CONFIG_DATA
1968 | 1 << ND_CMD_SET_CONFIG_DATA;
1969 if (family == NVDIMM_FAMILY_INTEL
1970 && (dsm_mask & label_mask) == label_mask)
1971 ;
1972 else {
1973 if (acpi_nvdimm_has_method(adev_dimm, "_LSI")
1974 && acpi_nvdimm_has_method(adev_dimm, "_LSR")) {
1975 dev_dbg(dev, "%s: has _LSR\n", dev_name(&adev_dimm->dev));
1976 set_bit(NFIT_MEM_LSR, &nfit_mem->flags);
1977 }
1978
1979 if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)
1980 && acpi_nvdimm_has_method(adev_dimm, "_LSW")) {
1981 dev_dbg(dev, "%s: has _LSW\n", dev_name(&adev_dimm->dev));
1982 set_bit(NFIT_MEM_LSW, &nfit_mem->flags);
1983 }
1984
1985
1986
1987
1988
1989 if (!test_bit(NFIT_MEM_LSW, &nfit_mem->flags)
1990 && !force_labels) {
1991 dev_dbg(dev, "%s: No _LSW, disable labels\n",
1992 dev_name(&adev_dimm->dev));
1993 clear_bit(NFIT_MEM_LSR, &nfit_mem->flags);
1994 } else
1995 dev_dbg(dev, "%s: Force enable labels\n",
1996 dev_name(&adev_dimm->dev));
1997 }
1998
1999 populate_shutdown_status(nfit_mem);
2000
2001 return 0;
2002}
2003
2004static void shutdown_dimm_notify(void *data)
2005{
2006 struct acpi_nfit_desc *acpi_desc = data;
2007 struct nfit_mem *nfit_mem;
2008
2009 mutex_lock(&acpi_desc->init_mutex);
2010
2011
2012
2013
2014 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
2015 struct acpi_device *adev_dimm = nfit_mem->adev;
2016
2017 if (nfit_mem->flags_attr) {
2018 sysfs_put(nfit_mem->flags_attr);
2019 nfit_mem->flags_attr = NULL;
2020 }
2021 if (adev_dimm) {
2022 acpi_remove_notify_handler(adev_dimm->handle,
2023 ACPI_DEVICE_NOTIFY, acpi_nvdimm_notify);
2024 dev_set_drvdata(&adev_dimm->dev, NULL);
2025 }
2026 }
2027 mutex_unlock(&acpi_desc->init_mutex);
2028}
2029
2030static const struct nvdimm_security_ops *acpi_nfit_get_security_ops(int family)
2031{
2032 switch (family) {
2033 case NVDIMM_FAMILY_INTEL:
2034 return intel_security_ops;
2035 default:
2036 return NULL;
2037 }
2038}
2039
2040static const struct nvdimm_fw_ops *acpi_nfit_get_fw_ops(
2041 struct nfit_mem *nfit_mem)
2042{
2043 unsigned long mask;
2044 struct acpi_nfit_desc *acpi_desc = nfit_mem->acpi_desc;
2045 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2046
2047 if (!nd_desc->fw_ops)
2048 return NULL;
2049
2050 if (nfit_mem->family != NVDIMM_FAMILY_INTEL)
2051 return NULL;
2052
2053 mask = nfit_mem->dsm_mask & NVDIMM_INTEL_FW_ACTIVATE_CMDMASK;
2054 if (mask != NVDIMM_INTEL_FW_ACTIVATE_CMDMASK)
2055 return NULL;
2056
2057 return intel_fw_ops;
2058}
2059
2060static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
2061{
2062 struct nfit_mem *nfit_mem;
2063 int dimm_count = 0, rc;
2064 struct nvdimm *nvdimm;
2065
2066 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
2067 struct acpi_nfit_flush_address *flush;
2068 unsigned long flags = 0, cmd_mask;
2069 struct nfit_memdev *nfit_memdev;
2070 u32 device_handle;
2071 u16 mem_flags;
2072
2073 device_handle = __to_nfit_memdev(nfit_mem)->device_handle;
2074 nvdimm = acpi_nfit_dimm_by_handle(acpi_desc, device_handle);
2075 if (nvdimm) {
2076 dimm_count++;
2077 continue;
2078 }
2079
2080 if (nfit_mem->bdw && nfit_mem->memdev_pmem) {
2081 set_bit(NDD_ALIASING, &flags);
2082 set_bit(NDD_LABELING, &flags);
2083 }
2084
2085
2086 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
2087 struct acpi_nfit_memory_map *dimm_memdev;
2088
2089 dimm_memdev = __to_nfit_memdev(nfit_mem);
2090 if (dimm_memdev->device_handle
2091 != nfit_memdev->memdev->device_handle)
2092 continue;
2093 dimm_memdev->flags |= nfit_memdev->memdev->flags;
2094 }
2095
2096 mem_flags = __to_nfit_memdev(nfit_mem)->flags;
2097 if (mem_flags & ACPI_NFIT_MEM_NOT_ARMED)
2098 set_bit(NDD_UNARMED, &flags);
2099
2100 rc = acpi_nfit_add_dimm(acpi_desc, nfit_mem, device_handle);
2101 if (rc)
2102 continue;
2103
2104
2105
2106
2107
2108
2109 cmd_mask = 1UL << ND_CMD_CALL;
2110 if (nfit_mem->family == NVDIMM_FAMILY_INTEL) {
2111
2112
2113
2114
2115
2116 cmd_mask |= nfit_mem->dsm_mask & NVDIMM_STANDARD_CMDMASK;
2117 }
2118
2119
2120 if (nfit_mem->family == NVDIMM_FAMILY_HYPERV)
2121 set_bit(NDD_NOBLK, &flags);
2122
2123 if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)) {
2124 set_bit(ND_CMD_GET_CONFIG_SIZE, &cmd_mask);
2125 set_bit(ND_CMD_GET_CONFIG_DATA, &cmd_mask);
2126 }
2127 if (test_bit(NFIT_MEM_LSW, &nfit_mem->flags))
2128 set_bit(ND_CMD_SET_CONFIG_DATA, &cmd_mask);
2129
2130 flush = nfit_mem->nfit_flush ? nfit_mem->nfit_flush->flush
2131 : NULL;
2132 nvdimm = __nvdimm_create(acpi_desc->nvdimm_bus, nfit_mem,
2133 acpi_nfit_dimm_attribute_groups,
2134 flags, cmd_mask, flush ? flush->hint_count : 0,
2135 nfit_mem->flush_wpq, &nfit_mem->id[0],
2136 acpi_nfit_get_security_ops(nfit_mem->family),
2137 acpi_nfit_get_fw_ops(nfit_mem));
2138 if (!nvdimm)
2139 return -ENOMEM;
2140
2141 nfit_mem->nvdimm = nvdimm;
2142 dimm_count++;
2143
2144 if ((mem_flags & ACPI_NFIT_MEM_FAILED_MASK) == 0)
2145 continue;
2146
2147 dev_err(acpi_desc->dev, "Error found in NVDIMM %s flags:%s%s%s%s%s\n",
2148 nvdimm_name(nvdimm),
2149 mem_flags & ACPI_NFIT_MEM_SAVE_FAILED ? " save_fail" : "",
2150 mem_flags & ACPI_NFIT_MEM_RESTORE_FAILED ? " restore_fail":"",
2151 mem_flags & ACPI_NFIT_MEM_FLUSH_FAILED ? " flush_fail" : "",
2152 mem_flags & ACPI_NFIT_MEM_NOT_ARMED ? " not_armed" : "",
2153 mem_flags & ACPI_NFIT_MEM_MAP_FAILED ? " map_fail" : "");
2154
2155 }
2156
2157 rc = nvdimm_bus_check_dimm_count(acpi_desc->nvdimm_bus, dimm_count);
2158 if (rc)
2159 return rc;
2160
2161
2162
2163
2164
2165 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
2166 struct kernfs_node *nfit_kernfs;
2167
2168 nvdimm = nfit_mem->nvdimm;
2169 if (!nvdimm)
2170 continue;
2171
2172 nfit_kernfs = sysfs_get_dirent(nvdimm_kobj(nvdimm)->sd, "nfit");
2173 if (nfit_kernfs)
2174 nfit_mem->flags_attr = sysfs_get_dirent(nfit_kernfs,
2175 "flags");
2176 sysfs_put(nfit_kernfs);
2177 if (!nfit_mem->flags_attr)
2178 dev_warn(acpi_desc->dev, "%s: notifications disabled\n",
2179 nvdimm_name(nvdimm));
2180 }
2181
2182 return devm_add_action_or_reset(acpi_desc->dev, shutdown_dimm_notify,
2183 acpi_desc);
2184}
2185
2186
2187
2188
2189
2190enum nfit_aux_cmds {
2191 NFIT_CMD_TRANSLATE_SPA = 5,
2192 NFIT_CMD_ARS_INJECT_SET = 7,
2193 NFIT_CMD_ARS_INJECT_CLEAR = 8,
2194 NFIT_CMD_ARS_INJECT_GET = 9,
2195};
2196
2197static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc)
2198{
2199 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2200 const guid_t *guid = to_nfit_uuid(NFIT_DEV_BUS);
2201 unsigned long dsm_mask, *mask;
2202 struct acpi_device *adev;
2203 int i;
2204
2205 set_bit(ND_CMD_CALL, &nd_desc->cmd_mask);
2206 set_bit(NVDIMM_BUS_FAMILY_NFIT, &nd_desc->bus_family_mask);
2207
2208
2209 if (acpi_desc->bus_cmd_force_en) {
2210 nd_desc->cmd_mask = acpi_desc->bus_cmd_force_en;
2211 mask = &nd_desc->bus_family_mask;
2212 if (acpi_desc->family_dsm_mask[NVDIMM_BUS_FAMILY_INTEL]) {
2213 set_bit(NVDIMM_BUS_FAMILY_INTEL, mask);
2214 nd_desc->fw_ops = intel_bus_fw_ops;
2215 }
2216 }
2217
2218 adev = to_acpi_dev(acpi_desc);
2219 if (!adev)
2220 return;
2221
2222 for (i = ND_CMD_ARS_CAP; i <= ND_CMD_CLEAR_ERROR; i++)
2223 if (acpi_check_dsm(adev->handle, guid, 1, 1ULL << i))
2224 set_bit(i, &nd_desc->cmd_mask);
2225
2226 dsm_mask =
2227 (1 << ND_CMD_ARS_CAP) |
2228 (1 << ND_CMD_ARS_START) |
2229 (1 << ND_CMD_ARS_STATUS) |
2230 (1 << ND_CMD_CLEAR_ERROR) |
2231 (1 << NFIT_CMD_TRANSLATE_SPA) |
2232 (1 << NFIT_CMD_ARS_INJECT_SET) |
2233 (1 << NFIT_CMD_ARS_INJECT_CLEAR) |
2234 (1 << NFIT_CMD_ARS_INJECT_GET);
2235 for_each_set_bit(i, &dsm_mask, BITS_PER_LONG)
2236 if (acpi_check_dsm(adev->handle, guid, 1, 1ULL << i))
2237 set_bit(i, &acpi_desc->bus_dsm_mask);
2238
2239
2240 dsm_mask = NVDIMM_BUS_INTEL_FW_ACTIVATE_CMDMASK;
2241 guid = to_nfit_bus_uuid(NVDIMM_BUS_FAMILY_INTEL);
2242 mask = &acpi_desc->family_dsm_mask[NVDIMM_BUS_FAMILY_INTEL];
2243 for_each_set_bit(i, &dsm_mask, BITS_PER_LONG)
2244 if (acpi_check_dsm(adev->handle, guid, 1, 1ULL << i))
2245 set_bit(i, mask);
2246
2247 if (*mask == dsm_mask) {
2248 set_bit(NVDIMM_BUS_FAMILY_INTEL, &nd_desc->bus_family_mask);
2249 nd_desc->fw_ops = intel_bus_fw_ops;
2250 }
2251}
2252
2253static ssize_t range_index_show(struct device *dev,
2254 struct device_attribute *attr, char *buf)
2255{
2256 struct nd_region *nd_region = to_nd_region(dev);
2257 struct nfit_spa *nfit_spa = nd_region_provider_data(nd_region);
2258
2259 return sprintf(buf, "%d\n", nfit_spa->spa->range_index);
2260}
2261static DEVICE_ATTR_RO(range_index);
2262
2263static struct attribute *acpi_nfit_region_attributes[] = {
2264 &dev_attr_range_index.attr,
2265 NULL,
2266};
2267
2268static const struct attribute_group acpi_nfit_region_attribute_group = {
2269 .name = "nfit",
2270 .attrs = acpi_nfit_region_attributes,
2271};
2272
2273static const struct attribute_group *acpi_nfit_region_attribute_groups[] = {
2274 &acpi_nfit_region_attribute_group,
2275 NULL,
2276};
2277
2278
2279struct nfit_set_info {
2280 u64 region_offset;
2281 u32 serial_number;
2282 u32 pad;
2283};
2284
2285struct nfit_set_info2 {
2286 u64 region_offset;
2287 u32 serial_number;
2288 u16 vendor_id;
2289 u16 manufacturing_date;
2290 u8 manufacturing_location;
2291 u8 reserved[31];
2292};
2293
2294static int cmp_map_compat(const void *m0, const void *m1)
2295{
2296 const struct nfit_set_info *map0 = m0;
2297 const struct nfit_set_info *map1 = m1;
2298
2299 return memcmp(&map0->region_offset, &map1->region_offset,
2300 sizeof(u64));
2301}
2302
2303static int cmp_map(const void *m0, const void *m1)
2304{
2305 const struct nfit_set_info *map0 = m0;
2306 const struct nfit_set_info *map1 = m1;
2307
2308 if (map0->region_offset < map1->region_offset)
2309 return -1;
2310 else if (map0->region_offset > map1->region_offset)
2311 return 1;
2312 return 0;
2313}
2314
2315static int cmp_map2(const void *m0, const void *m1)
2316{
2317 const struct nfit_set_info2 *map0 = m0;
2318 const struct nfit_set_info2 *map1 = m1;
2319
2320 if (map0->region_offset < map1->region_offset)
2321 return -1;
2322 else if (map0->region_offset > map1->region_offset)
2323 return 1;
2324 return 0;
2325}
2326
2327
2328static struct acpi_nfit_memory_map *memdev_from_spa(
2329 struct acpi_nfit_desc *acpi_desc, u16 range_index, int n)
2330{
2331 struct nfit_memdev *nfit_memdev;
2332
2333 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list)
2334 if (nfit_memdev->memdev->range_index == range_index)
2335 if (n-- == 0)
2336 return nfit_memdev->memdev;
2337 return NULL;
2338}
2339
2340static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc *acpi_desc,
2341 struct nd_region_desc *ndr_desc,
2342 struct acpi_nfit_system_address *spa)
2343{
2344 struct device *dev = acpi_desc->dev;
2345 struct nd_interleave_set *nd_set;
2346 u16 nr = ndr_desc->num_mappings;
2347 struct nfit_set_info2 *info2;
2348 struct nfit_set_info *info;
2349 int i;
2350
2351 nd_set = devm_kzalloc(dev, sizeof(*nd_set), GFP_KERNEL);
2352 if (!nd_set)
2353 return -ENOMEM;
2354 import_guid(&nd_set->type_guid, spa->range_guid);
2355
2356 info = devm_kcalloc(dev, nr, sizeof(*info), GFP_KERNEL);
2357 if (!info)
2358 return -ENOMEM;
2359
2360 info2 = devm_kcalloc(dev, nr, sizeof(*info2), GFP_KERNEL);
2361 if (!info2)
2362 return -ENOMEM;
2363
2364 for (i = 0; i < nr; i++) {
2365 struct nd_mapping_desc *mapping = &ndr_desc->mapping[i];
2366 struct nvdimm *nvdimm = mapping->nvdimm;
2367 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
2368 struct nfit_set_info *map = &info[i];
2369 struct nfit_set_info2 *map2 = &info2[i];
2370 struct acpi_nfit_memory_map *memdev =
2371 memdev_from_spa(acpi_desc, spa->range_index, i);
2372 struct acpi_nfit_control_region *dcr = nfit_mem->dcr;
2373
2374 if (!memdev || !nfit_mem->dcr) {
2375 dev_err(dev, "%s: failed to find DCR\n", __func__);
2376 return -ENODEV;
2377 }
2378
2379 map->region_offset = memdev->region_offset;
2380 map->serial_number = dcr->serial_number;
2381
2382 map2->region_offset = memdev->region_offset;
2383 map2->serial_number = dcr->serial_number;
2384 map2->vendor_id = dcr->vendor_id;
2385 map2->manufacturing_date = dcr->manufacturing_date;
2386 map2->manufacturing_location = dcr->manufacturing_location;
2387 }
2388
2389
2390 sort(info, nr, sizeof(*info), cmp_map, NULL);
2391 nd_set->cookie1 = nd_fletcher64(info, sizeof(*info) * nr, 0);
2392
2393
2394 sort(info2, nr, sizeof(*info2), cmp_map2, NULL);
2395 nd_set->cookie2 = nd_fletcher64(info2, sizeof(*info2) * nr, 0);
2396
2397
2398 sort(info, nr, sizeof(*info), cmp_map_compat, NULL);
2399 nd_set->altcookie = nd_fletcher64(info, sizeof(*info) * nr, 0);
2400
2401
2402 for (i = 0; i < nr; i++) {
2403 struct nfit_set_info2 *map2 = &info2[i];
2404 int j;
2405
2406 for (j = 0; j < nr; j++) {
2407 struct nd_mapping_desc *mapping = &ndr_desc->mapping[j];
2408 struct nvdimm *nvdimm = mapping->nvdimm;
2409 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
2410 struct acpi_nfit_control_region *dcr = nfit_mem->dcr;
2411
2412 if (map2->serial_number == dcr->serial_number &&
2413 map2->vendor_id == dcr->vendor_id &&
2414 map2->manufacturing_date == dcr->manufacturing_date &&
2415 map2->manufacturing_location
2416 == dcr->manufacturing_location) {
2417 mapping->position = i;
2418 break;
2419 }
2420 }
2421 }
2422
2423 ndr_desc->nd_set = nd_set;
2424 devm_kfree(dev, info);
2425 devm_kfree(dev, info2);
2426
2427 return 0;
2428}
2429
2430static u64 to_interleave_offset(u64 offset, struct nfit_blk_mmio *mmio)
2431{
2432 struct acpi_nfit_interleave *idt = mmio->idt;
2433 u32 sub_line_offset, line_index, line_offset;
2434 u64 line_no, table_skip_count, table_offset;
2435
2436 line_no = div_u64_rem(offset, mmio->line_size, &sub_line_offset);
2437 table_skip_count = div_u64_rem(line_no, mmio->num_lines, &line_index);
2438 line_offset = idt->line_offset[line_index]
2439 * mmio->line_size;
2440 table_offset = table_skip_count * mmio->table_size;
2441
2442 return mmio->base_offset + line_offset + table_offset + sub_line_offset;
2443}
2444
2445static u32 read_blk_stat(struct nfit_blk *nfit_blk, unsigned int bw)
2446{
2447 struct nfit_blk_mmio *mmio = &nfit_blk->mmio[DCR];
2448 u64 offset = nfit_blk->stat_offset + mmio->size * bw;
2449 const u32 STATUS_MASK = 0x80000037;
2450
2451 if (mmio->num_lines)
2452 offset = to_interleave_offset(offset, mmio);
2453
2454 return readl(mmio->addr.base + offset) & STATUS_MASK;
2455}
2456
2457static void write_blk_ctl(struct nfit_blk *nfit_blk, unsigned int bw,
2458 resource_size_t dpa, unsigned int len, unsigned int write)
2459{
2460 u64 cmd, offset;
2461 struct nfit_blk_mmio *mmio = &nfit_blk->mmio[DCR];
2462
2463 enum {
2464 BCW_OFFSET_MASK = (1ULL << 48)-1,
2465 BCW_LEN_SHIFT = 48,
2466 BCW_LEN_MASK = (1ULL << 8) - 1,
2467 BCW_CMD_SHIFT = 56,
2468 };
2469
2470 cmd = (dpa >> L1_CACHE_SHIFT) & BCW_OFFSET_MASK;
2471 len = len >> L1_CACHE_SHIFT;
2472 cmd |= ((u64) len & BCW_LEN_MASK) << BCW_LEN_SHIFT;
2473 cmd |= ((u64) write) << BCW_CMD_SHIFT;
2474
2475 offset = nfit_blk->cmd_offset + mmio->size * bw;
2476 if (mmio->num_lines)
2477 offset = to_interleave_offset(offset, mmio);
2478
2479 writeq(cmd, mmio->addr.base + offset);
2480 nvdimm_flush(nfit_blk->nd_region, NULL);
2481
2482 if (nfit_blk->dimm_flags & NFIT_BLK_DCR_LATCH)
2483 readq(mmio->addr.base + offset);
2484}
2485
2486static int acpi_nfit_blk_single_io(struct nfit_blk *nfit_blk,
2487 resource_size_t dpa, void *iobuf, size_t len, int rw,
2488 unsigned int lane)
2489{
2490 struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
2491 unsigned int copied = 0;
2492 u64 base_offset;
2493 int rc;
2494
2495 base_offset = nfit_blk->bdw_offset + dpa % L1_CACHE_BYTES
2496 + lane * mmio->size;
2497 write_blk_ctl(nfit_blk, lane, dpa, len, rw);
2498 while (len) {
2499 unsigned int c;
2500 u64 offset;
2501
2502 if (mmio->num_lines) {
2503 u32 line_offset;
2504
2505 offset = to_interleave_offset(base_offset + copied,
2506 mmio);
2507 div_u64_rem(offset, mmio->line_size, &line_offset);
2508 c = min_t(size_t, len, mmio->line_size - line_offset);
2509 } else {
2510 offset = base_offset + nfit_blk->bdw_offset;
2511 c = len;
2512 }
2513
2514 if (rw)
2515 memcpy_flushcache(mmio->addr.aperture + offset, iobuf + copied, c);
2516 else {
2517 if (nfit_blk->dimm_flags & NFIT_BLK_READ_FLUSH)
2518 arch_invalidate_pmem((void __force *)
2519 mmio->addr.aperture + offset, c);
2520
2521 memcpy(iobuf + copied, mmio->addr.aperture + offset, c);
2522 }
2523
2524 copied += c;
2525 len -= c;
2526 }
2527
2528 if (rw)
2529 nvdimm_flush(nfit_blk->nd_region, NULL);
2530
2531 rc = read_blk_stat(nfit_blk, lane) ? -EIO : 0;
2532 return rc;
2533}
2534
2535static int acpi_nfit_blk_region_do_io(struct nd_blk_region *ndbr,
2536 resource_size_t dpa, void *iobuf, u64 len, int rw)
2537{
2538 struct nfit_blk *nfit_blk = nd_blk_region_provider_data(ndbr);
2539 struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
2540 struct nd_region *nd_region = nfit_blk->nd_region;
2541 unsigned int lane, copied = 0;
2542 int rc = 0;
2543
2544 lane = nd_region_acquire_lane(nd_region);
2545 while (len) {
2546 u64 c = min(len, mmio->size);
2547
2548 rc = acpi_nfit_blk_single_io(nfit_blk, dpa + copied,
2549 iobuf + copied, c, rw, lane);
2550 if (rc)
2551 break;
2552
2553 copied += c;
2554 len -= c;
2555 }
2556 nd_region_release_lane(nd_region, lane);
2557
2558 return rc;
2559}
2560
2561static int nfit_blk_init_interleave(struct nfit_blk_mmio *mmio,
2562 struct acpi_nfit_interleave *idt, u16 interleave_ways)
2563{
2564 if (idt) {
2565 mmio->num_lines = idt->line_count;
2566 mmio->line_size = idt->line_size;
2567 if (interleave_ways == 0)
2568 return -ENXIO;
2569 mmio->table_size = mmio->num_lines * interleave_ways
2570 * mmio->line_size;
2571 }
2572
2573 return 0;
2574}
2575
2576static int acpi_nfit_blk_get_flags(struct nvdimm_bus_descriptor *nd_desc,
2577 struct nvdimm *nvdimm, struct nfit_blk *nfit_blk)
2578{
2579 struct nd_cmd_dimm_flags flags;
2580 int rc;
2581
2582 memset(&flags, 0, sizeof(flags));
2583 rc = nd_desc->ndctl(nd_desc, nvdimm, ND_CMD_DIMM_FLAGS, &flags,
2584 sizeof(flags), NULL);
2585
2586 if (rc >= 0 && flags.status == 0)
2587 nfit_blk->dimm_flags = flags.flags;
2588 else if (rc == -ENOTTY) {
2589
2590 nfit_blk->dimm_flags = NFIT_BLK_DCR_LATCH | NFIT_BLK_READ_FLUSH;
2591 rc = 0;
2592 } else
2593 rc = -ENXIO;
2594
2595 return rc;
2596}
2597
2598static int acpi_nfit_blk_region_enable(struct nvdimm_bus *nvdimm_bus,
2599 struct device *dev)
2600{
2601 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
2602 struct nd_blk_region *ndbr = to_nd_blk_region(dev);
2603 struct nfit_blk_mmio *mmio;
2604 struct nfit_blk *nfit_blk;
2605 struct nfit_mem *nfit_mem;
2606 struct nvdimm *nvdimm;
2607 int rc;
2608
2609 nvdimm = nd_blk_region_to_dimm(ndbr);
2610 nfit_mem = nvdimm_provider_data(nvdimm);
2611 if (!nfit_mem || !nfit_mem->dcr || !nfit_mem->bdw) {
2612 dev_dbg(dev, "missing%s%s%s\n",
2613 nfit_mem ? "" : " nfit_mem",
2614 (nfit_mem && nfit_mem->dcr) ? "" : " dcr",
2615 (nfit_mem && nfit_mem->bdw) ? "" : " bdw");
2616 return -ENXIO;
2617 }
2618
2619 nfit_blk = devm_kzalloc(dev, sizeof(*nfit_blk), GFP_KERNEL);
2620 if (!nfit_blk)
2621 return -ENOMEM;
2622 nd_blk_region_set_provider_data(ndbr, nfit_blk);
2623 nfit_blk->nd_region = to_nd_region(dev);
2624
2625
2626 nfit_blk->bdw_offset = nfit_mem->bdw->offset;
2627 mmio = &nfit_blk->mmio[BDW];
2628 mmio->addr.base = devm_nvdimm_memremap(dev, nfit_mem->spa_bdw->address,
2629 nfit_mem->spa_bdw->length, nd_blk_memremap_flags(ndbr));
2630 if (!mmio->addr.base) {
2631 dev_dbg(dev, "%s failed to map bdw\n",
2632 nvdimm_name(nvdimm));
2633 return -ENOMEM;
2634 }
2635 mmio->size = nfit_mem->bdw->size;
2636 mmio->base_offset = nfit_mem->memdev_bdw->region_offset;
2637 mmio->idt = nfit_mem->idt_bdw;
2638 mmio->spa = nfit_mem->spa_bdw;
2639 rc = nfit_blk_init_interleave(mmio, nfit_mem->idt_bdw,
2640 nfit_mem->memdev_bdw->interleave_ways);
2641 if (rc) {
2642 dev_dbg(dev, "%s failed to init bdw interleave\n",
2643 nvdimm_name(nvdimm));
2644 return rc;
2645 }
2646
2647
2648 nfit_blk->cmd_offset = nfit_mem->dcr->command_offset;
2649 nfit_blk->stat_offset = nfit_mem->dcr->status_offset;
2650 mmio = &nfit_blk->mmio[DCR];
2651 mmio->addr.base = devm_nvdimm_ioremap(dev, nfit_mem->spa_dcr->address,
2652 nfit_mem->spa_dcr->length);
2653 if (!mmio->addr.base) {
2654 dev_dbg(dev, "%s failed to map dcr\n",
2655 nvdimm_name(nvdimm));
2656 return -ENOMEM;
2657 }
2658 mmio->size = nfit_mem->dcr->window_size;
2659 mmio->base_offset = nfit_mem->memdev_dcr->region_offset;
2660 mmio->idt = nfit_mem->idt_dcr;
2661 mmio->spa = nfit_mem->spa_dcr;
2662 rc = nfit_blk_init_interleave(mmio, nfit_mem->idt_dcr,
2663 nfit_mem->memdev_dcr->interleave_ways);
2664 if (rc) {
2665 dev_dbg(dev, "%s failed to init dcr interleave\n",
2666 nvdimm_name(nvdimm));
2667 return rc;
2668 }
2669
2670 rc = acpi_nfit_blk_get_flags(nd_desc, nvdimm, nfit_blk);
2671 if (rc < 0) {
2672 dev_dbg(dev, "%s failed get DIMM flags\n",
2673 nvdimm_name(nvdimm));
2674 return rc;
2675 }
2676
2677 if (nvdimm_has_flush(nfit_blk->nd_region) < 0)
2678 dev_warn(dev, "unable to guarantee persistence of writes\n");
2679
2680 if (mmio->line_size == 0)
2681 return 0;
2682
2683 if ((u32) nfit_blk->cmd_offset % mmio->line_size
2684 + 8 > mmio->line_size) {
2685 dev_dbg(dev, "cmd_offset crosses interleave boundary\n");
2686 return -ENXIO;
2687 } else if ((u32) nfit_blk->stat_offset % mmio->line_size
2688 + 8 > mmio->line_size) {
2689 dev_dbg(dev, "stat_offset crosses interleave boundary\n");
2690 return -ENXIO;
2691 }
2692
2693 return 0;
2694}
2695
2696static int ars_get_cap(struct acpi_nfit_desc *acpi_desc,
2697 struct nd_cmd_ars_cap *cmd, struct nfit_spa *nfit_spa)
2698{
2699 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2700 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2701 int cmd_rc, rc;
2702
2703 cmd->address = spa->address;
2704 cmd->length = spa->length;
2705 rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_CAP, cmd,
2706 sizeof(*cmd), &cmd_rc);
2707 if (rc < 0)
2708 return rc;
2709 return cmd_rc;
2710}
2711
2712static int ars_start(struct acpi_nfit_desc *acpi_desc,
2713 struct nfit_spa *nfit_spa, enum nfit_ars_state req_type)
2714{
2715 int rc;
2716 int cmd_rc;
2717 struct nd_cmd_ars_start ars_start;
2718 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2719 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2720
2721 memset(&ars_start, 0, sizeof(ars_start));
2722 ars_start.address = spa->address;
2723 ars_start.length = spa->length;
2724 if (req_type == ARS_REQ_SHORT)
2725 ars_start.flags = ND_ARS_RETURN_PREV_DATA;
2726 if (nfit_spa_type(spa) == NFIT_SPA_PM)
2727 ars_start.type = ND_ARS_PERSISTENT;
2728 else if (nfit_spa_type(spa) == NFIT_SPA_VOLATILE)
2729 ars_start.type = ND_ARS_VOLATILE;
2730 else
2731 return -ENOTTY;
2732
2733 rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_START, &ars_start,
2734 sizeof(ars_start), &cmd_rc);
2735
2736 if (rc < 0)
2737 return rc;
2738 if (cmd_rc < 0)
2739 return cmd_rc;
2740 set_bit(ARS_VALID, &acpi_desc->scrub_flags);
2741 return 0;
2742}
2743
2744static int ars_continue(struct acpi_nfit_desc *acpi_desc)
2745{
2746 int rc, cmd_rc;
2747 struct nd_cmd_ars_start ars_start;
2748 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2749 struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
2750
2751 ars_start = (struct nd_cmd_ars_start) {
2752 .address = ars_status->restart_address,
2753 .length = ars_status->restart_length,
2754 .type = ars_status->type,
2755 };
2756 rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_START, &ars_start,
2757 sizeof(ars_start), &cmd_rc);
2758 if (rc < 0)
2759 return rc;
2760 return cmd_rc;
2761}
2762
2763static int ars_get_status(struct acpi_nfit_desc *acpi_desc)
2764{
2765 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2766 struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
2767 int rc, cmd_rc;
2768
2769 rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_STATUS, ars_status,
2770 acpi_desc->max_ars, &cmd_rc);
2771 if (rc < 0)
2772 return rc;
2773 return cmd_rc;
2774}
2775
2776static void ars_complete(struct acpi_nfit_desc *acpi_desc,
2777 struct nfit_spa *nfit_spa)
2778{
2779 struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
2780 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2781 struct nd_region *nd_region = nfit_spa->nd_region;
2782 struct device *dev;
2783
2784 lockdep_assert_held(&acpi_desc->init_mutex);
2785
2786
2787
2788
2789
2790 if (acpi_desc->scrub_spa != nfit_spa)
2791 return;
2792
2793 if ((ars_status->address >= spa->address && ars_status->address
2794 < spa->address + spa->length)
2795 || (ars_status->address < spa->address)) {
2796
2797
2798
2799
2800
2801
2802
2803
2804 if (ars_status->address + ars_status->length
2805 >= spa->address + spa->length)
2806 ;
2807 else
2808 return;
2809 } else
2810 return;
2811
2812 acpi_desc->scrub_spa = NULL;
2813 if (nd_region) {
2814 dev = nd_region_dev(nd_region);
2815 nvdimm_region_notify(nd_region, NVDIMM_REVALIDATE_POISON);
2816 } else
2817 dev = acpi_desc->dev;
2818 dev_dbg(dev, "ARS: range %d complete\n", spa->range_index);
2819}
2820
2821static int ars_status_process_records(struct acpi_nfit_desc *acpi_desc)
2822{
2823 struct nvdimm_bus *nvdimm_bus = acpi_desc->nvdimm_bus;
2824 struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
2825 int rc;
2826 u32 i;
2827
2828
2829
2830
2831
2832 if (ars_status->out_length < 44)
2833 return 0;
2834
2835
2836
2837
2838
2839 if (!test_and_clear_bit(ARS_VALID, &acpi_desc->scrub_flags)) {
2840 dev_dbg(acpi_desc->dev, "skip %d stale records\n",
2841 ars_status->num_records);
2842 return 0;
2843 }
2844
2845 for (i = 0; i < ars_status->num_records; i++) {
2846
2847 if (ars_status->out_length
2848 < 44 + sizeof(struct nd_ars_record) * (i + 1))
2849 break;
2850 rc = nvdimm_bus_add_badrange(nvdimm_bus,
2851 ars_status->records[i].err_address,
2852 ars_status->records[i].length);
2853 if (rc)
2854 return rc;
2855 }
2856 if (i < ars_status->num_records)
2857 dev_warn(acpi_desc->dev, "detected truncated ars results\n");
2858
2859 return 0;
2860}
2861
2862static void acpi_nfit_remove_resource(void *data)
2863{
2864 struct resource *res = data;
2865
2866 remove_resource(res);
2867}
2868
2869static int acpi_nfit_insert_resource(struct acpi_nfit_desc *acpi_desc,
2870 struct nd_region_desc *ndr_desc)
2871{
2872 struct resource *res, *nd_res = ndr_desc->res;
2873 int is_pmem, ret;
2874
2875
2876 is_pmem = region_intersects(nd_res->start, resource_size(nd_res),
2877 IORESOURCE_MEM, IORES_DESC_PERSISTENT_MEMORY);
2878 if (is_pmem == REGION_INTERSECTS)
2879 return 0;
2880
2881 res = devm_kzalloc(acpi_desc->dev, sizeof(*res), GFP_KERNEL);
2882 if (!res)
2883 return -ENOMEM;
2884
2885 res->name = "Persistent Memory";
2886 res->start = nd_res->start;
2887 res->end = nd_res->end;
2888 res->flags = IORESOURCE_MEM;
2889 res->desc = IORES_DESC_PERSISTENT_MEMORY;
2890
2891 ret = insert_resource(&iomem_resource, res);
2892 if (ret)
2893 return ret;
2894
2895 ret = devm_add_action_or_reset(acpi_desc->dev,
2896 acpi_nfit_remove_resource,
2897 res);
2898 if (ret)
2899 return ret;
2900
2901 return 0;
2902}
2903
2904static int acpi_nfit_init_mapping(struct acpi_nfit_desc *acpi_desc,
2905 struct nd_mapping_desc *mapping, struct nd_region_desc *ndr_desc,
2906 struct acpi_nfit_memory_map *memdev,
2907 struct nfit_spa *nfit_spa)
2908{
2909 struct nvdimm *nvdimm = acpi_nfit_dimm_by_handle(acpi_desc,
2910 memdev->device_handle);
2911 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2912 struct nd_blk_region_desc *ndbr_desc;
2913 struct nfit_mem *nfit_mem;
2914 int rc;
2915
2916 if (!nvdimm) {
2917 dev_err(acpi_desc->dev, "spa%d dimm: %#x not found\n",
2918 spa->range_index, memdev->device_handle);
2919 return -ENODEV;
2920 }
2921
2922 mapping->nvdimm = nvdimm;
2923 switch (nfit_spa_type(spa)) {
2924 case NFIT_SPA_PM:
2925 case NFIT_SPA_VOLATILE:
2926 mapping->start = memdev->address;
2927 mapping->size = memdev->region_size;
2928 break;
2929 case NFIT_SPA_DCR:
2930 nfit_mem = nvdimm_provider_data(nvdimm);
2931 if (!nfit_mem || !nfit_mem->bdw) {
2932 dev_dbg(acpi_desc->dev, "spa%d %s missing bdw\n",
2933 spa->range_index, nvdimm_name(nvdimm));
2934 break;
2935 }
2936
2937 mapping->size = nfit_mem->bdw->capacity;
2938 mapping->start = nfit_mem->bdw->start_address;
2939 ndr_desc->num_lanes = nfit_mem->bdw->windows;
2940 ndr_desc->mapping = mapping;
2941 ndr_desc->num_mappings = 1;
2942 ndbr_desc = to_blk_region_desc(ndr_desc);
2943 ndbr_desc->enable = acpi_nfit_blk_region_enable;
2944 ndbr_desc->do_io = acpi_desc->blk_do_io;
2945 rc = acpi_nfit_init_interleave_set(acpi_desc, ndr_desc, spa);
2946 if (rc)
2947 return rc;
2948 nfit_spa->nd_region = nvdimm_blk_region_create(acpi_desc->nvdimm_bus,
2949 ndr_desc);
2950 if (!nfit_spa->nd_region)
2951 return -ENOMEM;
2952 break;
2953 }
2954
2955 return 0;
2956}
2957
2958static bool nfit_spa_is_virtual(struct acpi_nfit_system_address *spa)
2959{
2960 return (nfit_spa_type(spa) == NFIT_SPA_VDISK ||
2961 nfit_spa_type(spa) == NFIT_SPA_VCD ||
2962 nfit_spa_type(spa) == NFIT_SPA_PDISK ||
2963 nfit_spa_type(spa) == NFIT_SPA_PCD);
2964}
2965
2966static bool nfit_spa_is_volatile(struct acpi_nfit_system_address *spa)
2967{
2968 return (nfit_spa_type(spa) == NFIT_SPA_VDISK ||
2969 nfit_spa_type(spa) == NFIT_SPA_VCD ||
2970 nfit_spa_type(spa) == NFIT_SPA_VOLATILE);
2971}
2972
2973static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc,
2974 struct nfit_spa *nfit_spa)
2975{
2976 static struct nd_mapping_desc mappings[ND_MAX_MAPPINGS];
2977 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2978 struct nd_blk_region_desc ndbr_desc;
2979 struct nd_region_desc *ndr_desc;
2980 struct nfit_memdev *nfit_memdev;
2981 struct nvdimm_bus *nvdimm_bus;
2982 struct resource res;
2983 int count = 0, rc;
2984
2985 if (nfit_spa->nd_region)
2986 return 0;
2987
2988 if (spa->range_index == 0 && !nfit_spa_is_virtual(spa)) {
2989 dev_dbg(acpi_desc->dev, "detected invalid spa index\n");
2990 return 0;
2991 }
2992
2993 memset(&res, 0, sizeof(res));
2994 memset(&mappings, 0, sizeof(mappings));
2995 memset(&ndbr_desc, 0, sizeof(ndbr_desc));
2996 res.start = spa->address;
2997 res.end = res.start + spa->length - 1;
2998 ndr_desc = &ndbr_desc.ndr_desc;
2999 ndr_desc->res = &res;
3000 ndr_desc->provider_data = nfit_spa;
3001 ndr_desc->attr_groups = acpi_nfit_region_attribute_groups;
3002 if (spa->flags & ACPI_NFIT_PROXIMITY_VALID) {
3003 ndr_desc->numa_node = pxm_to_online_node(spa->proximity_domain);
3004 ndr_desc->target_node = pxm_to_node(spa->proximity_domain);
3005 } else {
3006 ndr_desc->numa_node = NUMA_NO_NODE;
3007 ndr_desc->target_node = NUMA_NO_NODE;
3008 }
3009
3010
3011
3012
3013
3014
3015 if (acpi_desc->platform_cap & ACPI_NFIT_CAPABILITY_CACHE_FLUSH)
3016 set_bit(ND_REGION_PERSIST_CACHE, &ndr_desc->flags);
3017 else if (acpi_desc->platform_cap & ACPI_NFIT_CAPABILITY_MEM_FLUSH)
3018 set_bit(ND_REGION_PERSIST_MEMCTRL, &ndr_desc->flags);
3019
3020 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
3021 struct acpi_nfit_memory_map *memdev = nfit_memdev->memdev;
3022 struct nd_mapping_desc *mapping;
3023
3024
3025 if (memdev->range_index == 0 || spa->range_index == 0)
3026 continue;
3027 if (memdev->range_index != spa->range_index)
3028 continue;
3029 if (count >= ND_MAX_MAPPINGS) {
3030 dev_err(acpi_desc->dev, "spa%d exceeds max mappings %d\n",
3031 spa->range_index, ND_MAX_MAPPINGS);
3032 return -ENXIO;
3033 }
3034 mapping = &mappings[count++];
3035 rc = acpi_nfit_init_mapping(acpi_desc, mapping, ndr_desc,
3036 memdev, nfit_spa);
3037 if (rc)
3038 goto out;
3039 }
3040
3041 ndr_desc->mapping = mappings;
3042 ndr_desc->num_mappings = count;
3043 rc = acpi_nfit_init_interleave_set(acpi_desc, ndr_desc, spa);
3044 if (rc)
3045 goto out;
3046
3047 nvdimm_bus = acpi_desc->nvdimm_bus;
3048 if (nfit_spa_type(spa) == NFIT_SPA_PM) {
3049 rc = acpi_nfit_insert_resource(acpi_desc, ndr_desc);
3050 if (rc) {
3051 dev_warn(acpi_desc->dev,
3052 "failed to insert pmem resource to iomem: %d\n",
3053 rc);
3054 goto out;
3055 }
3056
3057 nfit_spa->nd_region = nvdimm_pmem_region_create(nvdimm_bus,
3058 ndr_desc);
3059 if (!nfit_spa->nd_region)
3060 rc = -ENOMEM;
3061 } else if (nfit_spa_is_volatile(spa)) {
3062 nfit_spa->nd_region = nvdimm_volatile_region_create(nvdimm_bus,
3063 ndr_desc);
3064 if (!nfit_spa->nd_region)
3065 rc = -ENOMEM;
3066 } else if (nfit_spa_is_virtual(spa)) {
3067 nfit_spa->nd_region = nvdimm_pmem_region_create(nvdimm_bus,
3068 ndr_desc);
3069 if (!nfit_spa->nd_region)
3070 rc = -ENOMEM;
3071 }
3072
3073 out:
3074 if (rc)
3075 dev_err(acpi_desc->dev, "failed to register spa range %d\n",
3076 nfit_spa->spa->range_index);
3077 return rc;
3078}
3079
3080static int ars_status_alloc(struct acpi_nfit_desc *acpi_desc)
3081{
3082 struct device *dev = acpi_desc->dev;
3083 struct nd_cmd_ars_status *ars_status;
3084
3085 if (acpi_desc->ars_status) {
3086 memset(acpi_desc->ars_status, 0, acpi_desc->max_ars);
3087 return 0;
3088 }
3089
3090 ars_status = devm_kzalloc(dev, acpi_desc->max_ars, GFP_KERNEL);
3091 if (!ars_status)
3092 return -ENOMEM;
3093 acpi_desc->ars_status = ars_status;
3094 return 0;
3095}
3096
3097static int acpi_nfit_query_poison(struct acpi_nfit_desc *acpi_desc)
3098{
3099 int rc;
3100
3101 if (ars_status_alloc(acpi_desc))
3102 return -ENOMEM;
3103
3104 rc = ars_get_status(acpi_desc);
3105
3106 if (rc < 0 && rc != -ENOSPC)
3107 return rc;
3108
3109 if (ars_status_process_records(acpi_desc))
3110 dev_err(acpi_desc->dev, "Failed to process ARS records\n");
3111
3112 return rc;
3113}
3114
3115static int ars_register(struct acpi_nfit_desc *acpi_desc,
3116 struct nfit_spa *nfit_spa)
3117{
3118 int rc;
3119
3120 if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
3121 return acpi_nfit_register_region(acpi_desc, nfit_spa);
3122
3123 set_bit(ARS_REQ_SHORT, &nfit_spa->ars_state);
3124 if (!no_init_ars)
3125 set_bit(ARS_REQ_LONG, &nfit_spa->ars_state);
3126
3127 switch (acpi_nfit_query_poison(acpi_desc)) {
3128 case 0:
3129 case -ENOSPC:
3130 case -EAGAIN:
3131 rc = ars_start(acpi_desc, nfit_spa, ARS_REQ_SHORT);
3132
3133 if (rc == -EBUSY)
3134 break;
3135 if (rc) {
3136 set_bit(ARS_FAILED, &nfit_spa->ars_state);
3137 break;
3138 }
3139 clear_bit(ARS_REQ_SHORT, &nfit_spa->ars_state);
3140 rc = acpi_nfit_query_poison(acpi_desc);
3141 if (rc)
3142 break;
3143 acpi_desc->scrub_spa = nfit_spa;
3144 ars_complete(acpi_desc, nfit_spa);
3145
3146
3147
3148
3149
3150 acpi_desc->scrub_spa = NULL;
3151 break;
3152 case -EBUSY:
3153 case -ENOMEM:
3154
3155
3156
3157
3158
3159 break;
3160 default:
3161 set_bit(ARS_FAILED, &nfit_spa->ars_state);
3162 break;
3163 }
3164
3165 return acpi_nfit_register_region(acpi_desc, nfit_spa);
3166}
3167
3168static void ars_complete_all(struct acpi_nfit_desc *acpi_desc)
3169{
3170 struct nfit_spa *nfit_spa;
3171
3172 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3173 if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
3174 continue;
3175 ars_complete(acpi_desc, nfit_spa);
3176 }
3177}
3178
3179static unsigned int __acpi_nfit_scrub(struct acpi_nfit_desc *acpi_desc,
3180 int query_rc)
3181{
3182 unsigned int tmo = acpi_desc->scrub_tmo;
3183 struct device *dev = acpi_desc->dev;
3184 struct nfit_spa *nfit_spa;
3185
3186 lockdep_assert_held(&acpi_desc->init_mutex);
3187
3188 if (test_bit(ARS_CANCEL, &acpi_desc->scrub_flags))
3189 return 0;
3190
3191 if (query_rc == -EBUSY) {
3192 dev_dbg(dev, "ARS: ARS busy\n");
3193 return min(30U * 60U, tmo * 2);
3194 }
3195 if (query_rc == -ENOSPC) {
3196 dev_dbg(dev, "ARS: ARS continue\n");
3197 ars_continue(acpi_desc);
3198 return 1;
3199 }
3200 if (query_rc && query_rc != -EAGAIN) {
3201 unsigned long long addr, end;
3202
3203 addr = acpi_desc->ars_status->address;
3204 end = addr + acpi_desc->ars_status->length;
3205 dev_dbg(dev, "ARS: %llx-%llx failed (%d)\n", addr, end,
3206 query_rc);
3207 }
3208
3209 ars_complete_all(acpi_desc);
3210 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3211 enum nfit_ars_state req_type;
3212 int rc;
3213
3214 if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
3215 continue;
3216
3217
3218 if (test_bit(ARS_REQ_SHORT, &nfit_spa->ars_state))
3219 req_type = ARS_REQ_SHORT;
3220 else if (test_bit(ARS_REQ_LONG, &nfit_spa->ars_state))
3221 req_type = ARS_REQ_LONG;
3222 else
3223 continue;
3224 rc = ars_start(acpi_desc, nfit_spa, req_type);
3225
3226 dev = nd_region_dev(nfit_spa->nd_region);
3227 dev_dbg(dev, "ARS: range %d ARS start %s (%d)\n",
3228 nfit_spa->spa->range_index,
3229 req_type == ARS_REQ_SHORT ? "short" : "long",
3230 rc);
3231
3232
3233
3234
3235 if (rc == -EBUSY)
3236 return 1;
3237 if (rc == 0) {
3238 dev_WARN_ONCE(dev, acpi_desc->scrub_spa,
3239 "scrub start while range %d active\n",
3240 acpi_desc->scrub_spa->spa->range_index);
3241 clear_bit(req_type, &nfit_spa->ars_state);
3242 acpi_desc->scrub_spa = nfit_spa;
3243
3244
3245
3246
3247 list_move_tail(&nfit_spa->list, &acpi_desc->spas);
3248 return 1;
3249 }
3250
3251 dev_err(dev, "ARS: range %d ARS failed (%d)\n",
3252 nfit_spa->spa->range_index, rc);
3253 set_bit(ARS_FAILED, &nfit_spa->ars_state);
3254 }
3255 return 0;
3256}
3257
3258static void __sched_ars(struct acpi_nfit_desc *acpi_desc, unsigned int tmo)
3259{
3260 lockdep_assert_held(&acpi_desc->init_mutex);
3261
3262 set_bit(ARS_BUSY, &acpi_desc->scrub_flags);
3263
3264 if (tmo)
3265 acpi_desc->scrub_tmo = tmo;
3266 queue_delayed_work(nfit_wq, &acpi_desc->dwork, tmo * HZ);
3267}
3268
3269static void sched_ars(struct acpi_nfit_desc *acpi_desc)
3270{
3271 __sched_ars(acpi_desc, 0);
3272}
3273
3274static void notify_ars_done(struct acpi_nfit_desc *acpi_desc)
3275{
3276 lockdep_assert_held(&acpi_desc->init_mutex);
3277
3278 clear_bit(ARS_BUSY, &acpi_desc->scrub_flags);
3279 acpi_desc->scrub_count++;
3280 if (acpi_desc->scrub_count_state)
3281 sysfs_notify_dirent(acpi_desc->scrub_count_state);
3282}
3283
3284static void acpi_nfit_scrub(struct work_struct *work)
3285{
3286 struct acpi_nfit_desc *acpi_desc;
3287 unsigned int tmo;
3288 int query_rc;
3289
3290 acpi_desc = container_of(work, typeof(*acpi_desc), dwork.work);
3291 mutex_lock(&acpi_desc->init_mutex);
3292 query_rc = acpi_nfit_query_poison(acpi_desc);
3293 tmo = __acpi_nfit_scrub(acpi_desc, query_rc);
3294 if (tmo)
3295 __sched_ars(acpi_desc, tmo);
3296 else
3297 notify_ars_done(acpi_desc);
3298 memset(acpi_desc->ars_status, 0, acpi_desc->max_ars);
3299 clear_bit(ARS_POLL, &acpi_desc->scrub_flags);
3300 mutex_unlock(&acpi_desc->init_mutex);
3301}
3302
3303static void acpi_nfit_init_ars(struct acpi_nfit_desc *acpi_desc,
3304 struct nfit_spa *nfit_spa)
3305{
3306 int type = nfit_spa_type(nfit_spa->spa);
3307 struct nd_cmd_ars_cap ars_cap;
3308 int rc;
3309
3310 set_bit(ARS_FAILED, &nfit_spa->ars_state);
3311 memset(&ars_cap, 0, sizeof(ars_cap));
3312 rc = ars_get_cap(acpi_desc, &ars_cap, nfit_spa);
3313 if (rc < 0)
3314 return;
3315
3316 if (type == NFIT_SPA_VOLATILE && ((ars_cap.status >> 16)
3317 & ND_ARS_VOLATILE) == 0)
3318 return;
3319 if (type == NFIT_SPA_PM && ((ars_cap.status >> 16)
3320 & ND_ARS_PERSISTENT) == 0)
3321 return;
3322
3323 nfit_spa->max_ars = ars_cap.max_ars_out;
3324 nfit_spa->clear_err_unit = ars_cap.clear_err_unit;
3325 acpi_desc->max_ars = max(nfit_spa->max_ars, acpi_desc->max_ars);
3326 clear_bit(ARS_FAILED, &nfit_spa->ars_state);
3327}
3328
3329static int acpi_nfit_register_regions(struct acpi_nfit_desc *acpi_desc)
3330{
3331 struct nfit_spa *nfit_spa;
3332 int rc, do_sched_ars = 0;
3333
3334 set_bit(ARS_VALID, &acpi_desc->scrub_flags);
3335 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3336 switch (nfit_spa_type(nfit_spa->spa)) {
3337 case NFIT_SPA_VOLATILE:
3338 case NFIT_SPA_PM:
3339 acpi_nfit_init_ars(acpi_desc, nfit_spa);
3340 break;
3341 }
3342 }
3343
3344 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3345 switch (nfit_spa_type(nfit_spa->spa)) {
3346 case NFIT_SPA_VOLATILE:
3347 case NFIT_SPA_PM:
3348
3349 rc = ars_register(acpi_desc, nfit_spa);
3350 if (rc)
3351 return rc;
3352
3353
3354
3355
3356
3357 if (!test_bit(ARS_FAILED, &nfit_spa->ars_state))
3358 do_sched_ars++;
3359 break;
3360 case NFIT_SPA_BDW:
3361
3362 break;
3363 case NFIT_SPA_DCR:
3364 case NFIT_SPA_VDISK:
3365 case NFIT_SPA_VCD:
3366 case NFIT_SPA_PDISK:
3367 case NFIT_SPA_PCD:
3368
3369 rc = acpi_nfit_register_region(acpi_desc, nfit_spa);
3370 if (rc)
3371 return rc;
3372 break;
3373 default:
3374
3375 break;
3376 }
3377 }
3378
3379 if (do_sched_ars)
3380 sched_ars(acpi_desc);
3381 return 0;
3382}
3383
3384static int acpi_nfit_check_deletions(struct acpi_nfit_desc *acpi_desc,
3385 struct nfit_table_prev *prev)
3386{
3387 struct device *dev = acpi_desc->dev;
3388
3389 if (!list_empty(&prev->spas) ||
3390 !list_empty(&prev->memdevs) ||
3391 !list_empty(&prev->dcrs) ||
3392 !list_empty(&prev->bdws) ||
3393 !list_empty(&prev->idts) ||
3394 !list_empty(&prev->flushes)) {
3395 dev_err(dev, "new nfit deletes entries (unsupported)\n");
3396 return -ENXIO;
3397 }
3398 return 0;
3399}
3400
3401static int acpi_nfit_desc_init_scrub_attr(struct acpi_nfit_desc *acpi_desc)
3402{
3403 struct device *dev = acpi_desc->dev;
3404 struct kernfs_node *nfit;
3405 struct device *bus_dev;
3406
3407 if (!ars_supported(acpi_desc->nvdimm_bus))
3408 return 0;
3409
3410 bus_dev = to_nvdimm_bus_dev(acpi_desc->nvdimm_bus);
3411 nfit = sysfs_get_dirent(bus_dev->kobj.sd, "nfit");
3412 if (!nfit) {
3413 dev_err(dev, "sysfs_get_dirent 'nfit' failed\n");
3414 return -ENODEV;
3415 }
3416 acpi_desc->scrub_count_state = sysfs_get_dirent(nfit, "scrub");
3417 sysfs_put(nfit);
3418 if (!acpi_desc->scrub_count_state) {
3419 dev_err(dev, "sysfs_get_dirent 'scrub' failed\n");
3420 return -ENODEV;
3421 }
3422
3423 return 0;
3424}
3425
3426static void acpi_nfit_unregister(void *data)
3427{
3428 struct acpi_nfit_desc *acpi_desc = data;
3429
3430 nvdimm_bus_unregister(acpi_desc->nvdimm_bus);
3431}
3432
3433int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *data, acpi_size sz)
3434{
3435 struct device *dev = acpi_desc->dev;
3436 struct nfit_table_prev prev;
3437 const void *end;
3438 int rc;
3439
3440 if (!acpi_desc->nvdimm_bus) {
3441 acpi_nfit_init_dsms(acpi_desc);
3442
3443 acpi_desc->nvdimm_bus = nvdimm_bus_register(dev,
3444 &acpi_desc->nd_desc);
3445 if (!acpi_desc->nvdimm_bus)
3446 return -ENOMEM;
3447
3448 rc = devm_add_action_or_reset(dev, acpi_nfit_unregister,
3449 acpi_desc);
3450 if (rc)
3451 return rc;
3452
3453 rc = acpi_nfit_desc_init_scrub_attr(acpi_desc);
3454 if (rc)
3455 return rc;
3456
3457
3458 mutex_lock(&acpi_desc_lock);
3459 list_add_tail(&acpi_desc->list, &acpi_descs);
3460 mutex_unlock(&acpi_desc_lock);
3461 }
3462
3463 mutex_lock(&acpi_desc->init_mutex);
3464
3465 INIT_LIST_HEAD(&prev.spas);
3466 INIT_LIST_HEAD(&prev.memdevs);
3467 INIT_LIST_HEAD(&prev.dcrs);
3468 INIT_LIST_HEAD(&prev.bdws);
3469 INIT_LIST_HEAD(&prev.idts);
3470 INIT_LIST_HEAD(&prev.flushes);
3471
3472 list_cut_position(&prev.spas, &acpi_desc->spas,
3473 acpi_desc->spas.prev);
3474 list_cut_position(&prev.memdevs, &acpi_desc->memdevs,
3475 acpi_desc->memdevs.prev);
3476 list_cut_position(&prev.dcrs, &acpi_desc->dcrs,
3477 acpi_desc->dcrs.prev);
3478 list_cut_position(&prev.bdws, &acpi_desc->bdws,
3479 acpi_desc->bdws.prev);
3480 list_cut_position(&prev.idts, &acpi_desc->idts,
3481 acpi_desc->idts.prev);
3482 list_cut_position(&prev.flushes, &acpi_desc->flushes,
3483 acpi_desc->flushes.prev);
3484
3485 end = data + sz;
3486 while (!IS_ERR_OR_NULL(data))
3487 data = add_table(acpi_desc, &prev, data, end);
3488
3489 if (IS_ERR(data)) {
3490 dev_dbg(dev, "nfit table parsing error: %ld\n", PTR_ERR(data));
3491 rc = PTR_ERR(data);
3492 goto out_unlock;
3493 }
3494
3495 rc = acpi_nfit_check_deletions(acpi_desc, &prev);
3496 if (rc)
3497 goto out_unlock;
3498
3499 rc = nfit_mem_init(acpi_desc);
3500 if (rc)
3501 goto out_unlock;
3502
3503 rc = acpi_nfit_register_dimms(acpi_desc);
3504 if (rc)
3505 goto out_unlock;
3506
3507 rc = acpi_nfit_register_regions(acpi_desc);
3508
3509 out_unlock:
3510 mutex_unlock(&acpi_desc->init_mutex);
3511 return rc;
3512}
3513EXPORT_SYMBOL_GPL(acpi_nfit_init);
3514
3515static int acpi_nfit_flush_probe(struct nvdimm_bus_descriptor *nd_desc)
3516{
3517 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
3518 struct device *dev = acpi_desc->dev;
3519
3520
3521 nfit_device_lock(dev);
3522 nfit_device_unlock(dev);
3523
3524
3525 mutex_lock(&acpi_desc->init_mutex);
3526 mutex_unlock(&acpi_desc->init_mutex);
3527
3528 return 0;
3529}
3530
3531static int __acpi_nfit_clear_to_send(struct nvdimm_bus_descriptor *nd_desc,
3532 struct nvdimm *nvdimm, unsigned int cmd)
3533{
3534 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
3535
3536 if (nvdimm)
3537 return 0;
3538 if (cmd != ND_CMD_ARS_START)
3539 return 0;
3540
3541
3542
3543
3544
3545
3546
3547 if (work_busy(&acpi_desc->dwork.work))
3548 return -EBUSY;
3549
3550 return 0;
3551}
3552
3553
3554
3555
3556
3557static int acpi_nfit_clear_to_send(struct nvdimm_bus_descriptor *nd_desc,
3558 struct nvdimm *nvdimm, unsigned int cmd, void *buf)
3559{
3560 struct nd_cmd_pkg *call_pkg = buf;
3561 unsigned int func;
3562
3563 if (nvdimm && cmd == ND_CMD_CALL &&
3564 call_pkg->nd_family == NVDIMM_FAMILY_INTEL) {
3565 func = call_pkg->nd_command;
3566 if (func > NVDIMM_CMD_MAX ||
3567 (1 << func) & NVDIMM_INTEL_DENY_CMDMASK)
3568 return -EOPNOTSUPP;
3569 }
3570
3571
3572 if (!nvdimm && cmd == ND_CMD_CALL &&
3573 call_pkg->nd_family != NVDIMM_BUS_FAMILY_NFIT)
3574 return -EOPNOTSUPP;
3575
3576 return __acpi_nfit_clear_to_send(nd_desc, nvdimm, cmd);
3577}
3578
3579int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc,
3580 enum nfit_ars_state req_type)
3581{
3582 struct device *dev = acpi_desc->dev;
3583 int scheduled = 0, busy = 0;
3584 struct nfit_spa *nfit_spa;
3585
3586 mutex_lock(&acpi_desc->init_mutex);
3587 if (test_bit(ARS_CANCEL, &acpi_desc->scrub_flags)) {
3588 mutex_unlock(&acpi_desc->init_mutex);
3589 return 0;
3590 }
3591
3592 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3593 int type = nfit_spa_type(nfit_spa->spa);
3594
3595 if (type != NFIT_SPA_PM && type != NFIT_SPA_VOLATILE)
3596 continue;
3597 if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
3598 continue;
3599
3600 if (test_and_set_bit(req_type, &nfit_spa->ars_state))
3601 busy++;
3602 else
3603 scheduled++;
3604 }
3605 if (scheduled) {
3606 sched_ars(acpi_desc);
3607 dev_dbg(dev, "ars_scan triggered\n");
3608 }
3609 mutex_unlock(&acpi_desc->init_mutex);
3610
3611 if (scheduled)
3612 return 0;
3613 if (busy)
3614 return -EBUSY;
3615 return -ENOTTY;
3616}
3617
3618void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev)
3619{
3620 struct nvdimm_bus_descriptor *nd_desc;
3621
3622 dev_set_drvdata(dev, acpi_desc);
3623 acpi_desc->dev = dev;
3624 acpi_desc->blk_do_io = acpi_nfit_blk_region_do_io;
3625 nd_desc = &acpi_desc->nd_desc;
3626 nd_desc->provider_name = "ACPI.NFIT";
3627 nd_desc->module = THIS_MODULE;
3628 nd_desc->ndctl = acpi_nfit_ctl;
3629 nd_desc->flush_probe = acpi_nfit_flush_probe;
3630 nd_desc->clear_to_send = acpi_nfit_clear_to_send;
3631 nd_desc->attr_groups = acpi_nfit_attribute_groups;
3632
3633 INIT_LIST_HEAD(&acpi_desc->spas);
3634 INIT_LIST_HEAD(&acpi_desc->dcrs);
3635 INIT_LIST_HEAD(&acpi_desc->bdws);
3636 INIT_LIST_HEAD(&acpi_desc->idts);
3637 INIT_LIST_HEAD(&acpi_desc->flushes);
3638 INIT_LIST_HEAD(&acpi_desc->memdevs);
3639 INIT_LIST_HEAD(&acpi_desc->dimms);
3640 INIT_LIST_HEAD(&acpi_desc->list);
3641 mutex_init(&acpi_desc->init_mutex);
3642 acpi_desc->scrub_tmo = 1;
3643 INIT_DELAYED_WORK(&acpi_desc->dwork, acpi_nfit_scrub);
3644}
3645EXPORT_SYMBOL_GPL(acpi_nfit_desc_init);
3646
3647static void acpi_nfit_put_table(void *table)
3648{
3649 acpi_put_table(table);
3650}
3651
3652void acpi_nfit_shutdown(void *data)
3653{
3654 struct acpi_nfit_desc *acpi_desc = data;
3655 struct device *bus_dev = to_nvdimm_bus_dev(acpi_desc->nvdimm_bus);
3656
3657
3658
3659
3660
3661 mutex_lock(&acpi_desc_lock);
3662 list_del(&acpi_desc->list);
3663 mutex_unlock(&acpi_desc_lock);
3664
3665 mutex_lock(&acpi_desc->init_mutex);
3666 set_bit(ARS_CANCEL, &acpi_desc->scrub_flags);
3667 cancel_delayed_work_sync(&acpi_desc->dwork);
3668 mutex_unlock(&acpi_desc->init_mutex);
3669
3670
3671
3672
3673
3674
3675 nfit_device_lock(bus_dev);
3676 nfit_device_unlock(bus_dev);
3677
3678 flush_workqueue(nfit_wq);
3679}
3680EXPORT_SYMBOL_GPL(acpi_nfit_shutdown);
3681
3682static int acpi_nfit_add(struct acpi_device *adev)
3683{
3684 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
3685 struct acpi_nfit_desc *acpi_desc;
3686 struct device *dev = &adev->dev;
3687 struct acpi_table_header *tbl;
3688 acpi_status status = AE_OK;
3689 acpi_size sz;
3690 int rc = 0;
3691
3692 status = acpi_get_table(ACPI_SIG_NFIT, 0, &tbl);
3693 if (ACPI_FAILURE(status)) {
3694
3695
3696
3697
3698
3699
3700
3701 dev_dbg(dev, "failed to find NFIT at startup\n");
3702 return 0;
3703 }
3704
3705 rc = devm_add_action_or_reset(dev, acpi_nfit_put_table, tbl);
3706 if (rc)
3707 return rc;
3708 sz = tbl->length;
3709
3710 acpi_desc = devm_kzalloc(dev, sizeof(*acpi_desc), GFP_KERNEL);
3711 if (!acpi_desc)
3712 return -ENOMEM;
3713 acpi_nfit_desc_init(acpi_desc, &adev->dev);
3714
3715
3716 acpi_desc->acpi_header = *tbl;
3717
3718
3719 status = acpi_evaluate_object(adev->handle, "_FIT", NULL, &buf);
3720 if (ACPI_SUCCESS(status) && buf.length > 0) {
3721 union acpi_object *obj = buf.pointer;
3722
3723 if (obj->type == ACPI_TYPE_BUFFER)
3724 rc = acpi_nfit_init(acpi_desc, obj->buffer.pointer,
3725 obj->buffer.length);
3726 else
3727 dev_dbg(dev, "invalid type %d, ignoring _FIT\n",
3728 (int) obj->type);
3729 kfree(buf.pointer);
3730 } else
3731
3732 rc = acpi_nfit_init(acpi_desc, (void *) tbl
3733 + sizeof(struct acpi_table_nfit),
3734 sz - sizeof(struct acpi_table_nfit));
3735
3736 if (rc)
3737 return rc;
3738 return devm_add_action_or_reset(dev, acpi_nfit_shutdown, acpi_desc);
3739}
3740
3741static int acpi_nfit_remove(struct acpi_device *adev)
3742{
3743
3744 return 0;
3745}
3746
3747static void acpi_nfit_update_notify(struct device *dev, acpi_handle handle)
3748{
3749 struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(dev);
3750 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
3751 union acpi_object *obj;
3752 acpi_status status;
3753 int ret;
3754
3755 if (!dev->driver) {
3756
3757 dev_dbg(dev, "no driver found for dev\n");
3758 return;
3759 }
3760
3761 if (!acpi_desc) {
3762 acpi_desc = devm_kzalloc(dev, sizeof(*acpi_desc), GFP_KERNEL);
3763 if (!acpi_desc)
3764 return;
3765 acpi_nfit_desc_init(acpi_desc, dev);
3766 } else {
3767
3768
3769
3770
3771 flush_workqueue(nfit_wq);
3772 }
3773
3774
3775 status = acpi_evaluate_object(handle, "_FIT", NULL, &buf);
3776 if (ACPI_FAILURE(status)) {
3777 dev_err(dev, "failed to evaluate _FIT\n");
3778 return;
3779 }
3780
3781 obj = buf.pointer;
3782 if (obj->type == ACPI_TYPE_BUFFER) {
3783 ret = acpi_nfit_init(acpi_desc, obj->buffer.pointer,
3784 obj->buffer.length);
3785 if (ret)
3786 dev_err(dev, "failed to merge updated NFIT\n");
3787 } else
3788 dev_err(dev, "Invalid _FIT\n");
3789 kfree(buf.pointer);
3790}
3791
3792static void acpi_nfit_uc_error_notify(struct device *dev, acpi_handle handle)
3793{
3794 struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(dev);
3795
3796 if (acpi_desc->scrub_mode == HW_ERROR_SCRUB_ON)
3797 acpi_nfit_ars_rescan(acpi_desc, ARS_REQ_LONG);
3798 else
3799 acpi_nfit_ars_rescan(acpi_desc, ARS_REQ_SHORT);
3800}
3801
3802void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event)
3803{
3804 dev_dbg(dev, "event: 0x%x\n", event);
3805
3806 switch (event) {
3807 case NFIT_NOTIFY_UPDATE:
3808 return acpi_nfit_update_notify(dev, handle);
3809 case NFIT_NOTIFY_UC_MEMORY_ERROR:
3810 return acpi_nfit_uc_error_notify(dev, handle);
3811 default:
3812 return;
3813 }
3814}
3815EXPORT_SYMBOL_GPL(__acpi_nfit_notify);
3816
3817static void acpi_nfit_notify(struct acpi_device *adev, u32 event)
3818{
3819 nfit_device_lock(&adev->dev);
3820 __acpi_nfit_notify(&adev->dev, adev->handle, event);
3821 nfit_device_unlock(&adev->dev);
3822}
3823
3824static const struct acpi_device_id acpi_nfit_ids[] = {
3825 { "ACPI0012", 0 },
3826 { "", 0 },
3827};
3828MODULE_DEVICE_TABLE(acpi, acpi_nfit_ids);
3829
3830static struct acpi_driver acpi_nfit_driver = {
3831 .name = KBUILD_MODNAME,
3832 .ids = acpi_nfit_ids,
3833 .ops = {
3834 .add = acpi_nfit_add,
3835 .remove = acpi_nfit_remove,
3836 .notify = acpi_nfit_notify,
3837 },
3838};
3839
3840static __init int nfit_init(void)
3841{
3842 int ret;
3843
3844 BUILD_BUG_ON(sizeof(struct acpi_table_nfit) != 40);
3845 BUILD_BUG_ON(sizeof(struct acpi_nfit_system_address) != 64);
3846 BUILD_BUG_ON(sizeof(struct acpi_nfit_memory_map) != 48);
3847 BUILD_BUG_ON(sizeof(struct acpi_nfit_interleave) != 20);
3848 BUILD_BUG_ON(sizeof(struct acpi_nfit_smbios) != 9);
3849 BUILD_BUG_ON(sizeof(struct acpi_nfit_control_region) != 80);
3850 BUILD_BUG_ON(sizeof(struct acpi_nfit_data_region) != 40);
3851 BUILD_BUG_ON(sizeof(struct acpi_nfit_capabilities) != 16);
3852
3853 guid_parse(UUID_VOLATILE_MEMORY, &nfit_uuid[NFIT_SPA_VOLATILE]);
3854 guid_parse(UUID_PERSISTENT_MEMORY, &nfit_uuid[NFIT_SPA_PM]);
3855 guid_parse(UUID_CONTROL_REGION, &nfit_uuid[NFIT_SPA_DCR]);
3856 guid_parse(UUID_DATA_REGION, &nfit_uuid[NFIT_SPA_BDW]);
3857 guid_parse(UUID_VOLATILE_VIRTUAL_DISK, &nfit_uuid[NFIT_SPA_VDISK]);
3858 guid_parse(UUID_VOLATILE_VIRTUAL_CD, &nfit_uuid[NFIT_SPA_VCD]);
3859 guid_parse(UUID_PERSISTENT_VIRTUAL_DISK, &nfit_uuid[NFIT_SPA_PDISK]);
3860 guid_parse(UUID_PERSISTENT_VIRTUAL_CD, &nfit_uuid[NFIT_SPA_PCD]);
3861 guid_parse(UUID_NFIT_BUS, &nfit_uuid[NFIT_DEV_BUS]);
3862 guid_parse(UUID_NFIT_DIMM, &nfit_uuid[NFIT_DEV_DIMM]);
3863 guid_parse(UUID_NFIT_DIMM_N_HPE1, &nfit_uuid[NFIT_DEV_DIMM_N_HPE1]);
3864 guid_parse(UUID_NFIT_DIMM_N_HPE2, &nfit_uuid[NFIT_DEV_DIMM_N_HPE2]);
3865 guid_parse(UUID_NFIT_DIMM_N_MSFT, &nfit_uuid[NFIT_DEV_DIMM_N_MSFT]);
3866 guid_parse(UUID_NFIT_DIMM_N_HYPERV, &nfit_uuid[NFIT_DEV_DIMM_N_HYPERV]);
3867 guid_parse(UUID_INTEL_BUS, &nfit_uuid[NFIT_BUS_INTEL]);
3868
3869 nfit_wq = create_singlethread_workqueue("nfit");
3870 if (!nfit_wq)
3871 return -ENOMEM;
3872
3873 nfit_mce_register();
3874 ret = acpi_bus_register_driver(&acpi_nfit_driver);
3875 if (ret) {
3876 nfit_mce_unregister();
3877 destroy_workqueue(nfit_wq);
3878 }
3879
3880 return ret;
3881
3882}
3883
3884static __exit void nfit_exit(void)
3885{
3886 nfit_mce_unregister();
3887 acpi_bus_unregister_driver(&acpi_nfit_driver);
3888 destroy_workqueue(nfit_wq);
3889 WARN_ON(!list_empty(&acpi_descs));
3890}
3891
3892module_init(nfit_init);
3893module_exit(nfit_exit);
3894MODULE_LICENSE("GPL v2");
3895MODULE_AUTHOR("Intel Corporation");
3896