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