This source file includes following definitions.
- to_nfit_uuid
- to_acpi_dev
- xlat_bus_status
- xlat_nvdimm_status
- xlat_status
- pkg_to_buf
- int_to_buf
- acpi_label_write
- acpi_label_read
- acpi_label_info
- nfit_dsm_revid
- payload_dumpable
- cmd_to_func
- acpi_nfit_ctl
- spa_type_name
- nfit_spa_type
- add_spa
- add_memdev
- nfit_get_smbios_id
- sizeof_dcr
- add_dcr
- add_bdw
- sizeof_idt
- add_idt
- sizeof_flush
- add_flush
- add_platform_cap
- add_table
- nfit_mem_find_spa_bdw
- nfit_mem_init_bdw
- __nfit_mem_init
- nfit_mem_cmp
- nfit_mem_init
- bus_dsm_mask_show
- revision_show
- hw_error_scrub_show
- hw_error_scrub_store
- scrub_show
- scrub_store
- ars_supported
- nfit_visible
- to_nfit_memdev
- to_nfit_dcr
- handle_show
- phys_id_show
- vendor_show
- rev_id_show
- device_show
- subsystem_vendor_show
- subsystem_rev_id_show
- subsystem_device_show
- num_nvdimm_formats
- format_show
- format1_show
- formats_show
- serial_show
- family_show
- dsm_mask_show
- flags_show
- id_show
- dirty_shutdown_show
- acpi_nfit_dimm_attr_visible
- acpi_nfit_dimm_by_handle
- __acpi_nvdimm_notify
- acpi_nvdimm_notify
- acpi_nvdimm_has_method
- nfit_intel_shutdown_status
- populate_shutdown_status
- acpi_nfit_add_dimm
- shutdown_dimm_notify
- acpi_nfit_get_security_ops
- acpi_nfit_register_dimms
- acpi_nfit_init_dsms
- range_index_show
- sizeof_nfit_set_info
- sizeof_nfit_set_info2
- cmp_map_compat
- cmp_map
- cmp_map2
- memdev_from_spa
- acpi_nfit_init_interleave_set
- to_interleave_offset
- read_blk_stat
- write_blk_ctl
- acpi_nfit_blk_single_io
- acpi_nfit_blk_region_do_io
- nfit_blk_init_interleave
- acpi_nfit_blk_get_flags
- acpi_nfit_blk_region_enable
- ars_get_cap
- ars_start
- ars_continue
- ars_get_status
- ars_complete
- ars_status_process_records
- acpi_nfit_remove_resource
- acpi_nfit_insert_resource
- acpi_nfit_init_mapping
- nfit_spa_is_virtual
- nfit_spa_is_volatile
- acpi_nfit_register_region
- ars_status_alloc
- acpi_nfit_query_poison
- ars_register
- ars_complete_all
- __acpi_nfit_scrub
- __sched_ars
- sched_ars
- notify_ars_done
- acpi_nfit_scrub
- acpi_nfit_init_ars
- acpi_nfit_register_regions
- acpi_nfit_check_deletions
- acpi_nfit_desc_init_scrub_attr
- acpi_nfit_unregister
- acpi_nfit_init
- acpi_nfit_flush_probe
- __acpi_nfit_clear_to_send
- acpi_nfit_clear_to_send
- acpi_nfit_ars_rescan
- acpi_nfit_desc_init
- acpi_nfit_put_table
- acpi_nfit_shutdown
- acpi_nfit_add
- acpi_nfit_remove
- acpi_nfit_update_notify
- acpi_nfit_uc_error_notify
- __acpi_nfit_notify
- acpi_nfit_notify
- nfit_init
- nfit_exit
1
2
3
4
5 #include <linux/list_sort.h>
6 #include <linux/libnvdimm.h>
7 #include <linux/module.h>
8 #include <linux/mutex.h>
9 #include <linux/ndctl.h>
10 #include <linux/sysfs.h>
11 #include <linux/delay.h>
12 #include <linux/list.h>
13 #include <linux/acpi.h>
14 #include <linux/sort.h>
15 #include <linux/io.h>
16 #include <linux/nd.h>
17 #include <asm/cacheflush.h>
18 #include <acpi/nfit.h>
19 #include "intel.h"
20 #include "nfit.h"
21
22
23
24
25
26 #include <linux/io-64-nonatomic-hi-lo.h>
27
28 static bool force_enable_dimms;
29 module_param(force_enable_dimms, bool, S_IRUGO|S_IWUSR);
30 MODULE_PARM_DESC(force_enable_dimms, "Ignore _STA (ACPI DIMM device) status");
31
32 static bool disable_vendor_specific;
33 module_param(disable_vendor_specific, bool, S_IRUGO);
34 MODULE_PARM_DESC(disable_vendor_specific,
35 "Limit commands to the publicly specified set");
36
37 static unsigned long override_dsm_mask;
38 module_param(override_dsm_mask, ulong, S_IRUGO);
39 MODULE_PARM_DESC(override_dsm_mask, "Bitmask of allowed NVDIMM DSM functions");
40
41 static int default_dsm_family = -1;
42 module_param(default_dsm_family, int, S_IRUGO);
43 MODULE_PARM_DESC(default_dsm_family,
44 "Try this DSM type first when identifying NVDIMM family");
45
46 static bool no_init_ars;
47 module_param(no_init_ars, bool, 0644);
48 MODULE_PARM_DESC(no_init_ars, "Skip ARS run at nfit init time");
49
50 static bool force_labels;
51 module_param(force_labels, bool, 0444);
52 MODULE_PARM_DESC(force_labels, "Opt-in to labels despite missing methods");
53
54 LIST_HEAD(acpi_descs);
55 DEFINE_MUTEX(acpi_desc_lock);
56
57 static struct workqueue_struct *nfit_wq;
58
59 struct nfit_table_prev {
60 struct list_head spas;
61 struct list_head memdevs;
62 struct list_head dcrs;
63 struct list_head bdws;
64 struct list_head idts;
65 struct list_head flushes;
66 };
67
68 static guid_t nfit_uuid[NFIT_UUID_MAX];
69
70 const guid_t *to_nfit_uuid(enum nfit_uuids id)
71 {
72 return &nfit_uuid[id];
73 }
74 EXPORT_SYMBOL(to_nfit_uuid);
75
76 static struct acpi_device *to_acpi_dev(struct acpi_nfit_desc *acpi_desc)
77 {
78 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
79
80
81
82
83
84 if (!nd_desc->provider_name
85 || strcmp(nd_desc->provider_name, "ACPI.NFIT") != 0)
86 return NULL;
87
88 return to_acpi_device(acpi_desc->dev);
89 }
90
91 static int xlat_bus_status(void *buf, unsigned int cmd, u32 status)
92 {
93 struct nd_cmd_clear_error *clear_err;
94 struct nd_cmd_ars_status *ars_status;
95 u16 flags;
96
97 switch (cmd) {
98 case ND_CMD_ARS_CAP:
99 if ((status & 0xffff) == NFIT_ARS_CAP_NONE)
100 return -ENOTTY;
101
102
103 if (status & 0xffff)
104 return -EIO;
105
106
107 flags = ND_ARS_PERSISTENT | ND_ARS_VOLATILE;
108 if ((status >> 16 & flags) == 0)
109 return -ENOTTY;
110 return 0;
111 case ND_CMD_ARS_START:
112
113 if ((status & 0xffff) == NFIT_ARS_START_BUSY)
114 return -EBUSY;
115
116
117 if (status & 0xffff)
118 return -EIO;
119 return 0;
120 case ND_CMD_ARS_STATUS:
121 ars_status = buf;
122
123 if (status & 0xffff)
124 return -EIO;
125
126 if (status == NFIT_ARS_STATUS_DONE)
127 return 0;
128
129
130 if (status == NFIT_ARS_STATUS_BUSY)
131 return -EBUSY;
132
133
134 if (status == NFIT_ARS_STATUS_NONE)
135 return -EAGAIN;
136
137
138
139
140
141
142 if (status == NFIT_ARS_STATUS_INTR) {
143 if (ars_status->out_length >= 40 && (ars_status->flags
144 & NFIT_ARS_F_OVERFLOW))
145 return -ENOSPC;
146 return 0;
147 }
148
149
150 if (status >> 16)
151 return -EIO;
152 return 0;
153 case ND_CMD_CLEAR_ERROR:
154 clear_err = buf;
155 if (status & 0xffff)
156 return -EIO;
157 if (!clear_err->cleared)
158 return -EIO;
159 if (clear_err->length > clear_err->cleared)
160 return clear_err->cleared;
161 return 0;
162 default:
163 break;
164 }
165
166
167 if (status)
168 return -EIO;
169 return 0;
170 }
171
172 #define ACPI_LABELS_LOCKED 3
173
174 static int xlat_nvdimm_status(struct nvdimm *nvdimm, void *buf, unsigned int cmd,
175 u32 status)
176 {
177 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
178
179 switch (cmd) {
180 case ND_CMD_GET_CONFIG_SIZE:
181
182
183
184
185 if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags))
186 break;
187
188 if (status >> 16 & ND_CONFIG_LOCKED)
189 return -EACCES;
190 break;
191 case ND_CMD_GET_CONFIG_DATA:
192 if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)
193 && status == ACPI_LABELS_LOCKED)
194 return -EACCES;
195 break;
196 case ND_CMD_SET_CONFIG_DATA:
197 if (test_bit(NFIT_MEM_LSW, &nfit_mem->flags)
198 && status == ACPI_LABELS_LOCKED)
199 return -EACCES;
200 break;
201 default:
202 break;
203 }
204
205
206 if (status)
207 return -EIO;
208 return 0;
209 }
210
211 static int xlat_status(struct nvdimm *nvdimm, void *buf, unsigned int cmd,
212 u32 status)
213 {
214 if (!nvdimm)
215 return xlat_bus_status(buf, cmd, status);
216 return xlat_nvdimm_status(nvdimm, buf, cmd, status);
217 }
218
219
220 static union acpi_object *pkg_to_buf(union acpi_object *pkg)
221 {
222 int i;
223 void *dst;
224 size_t size = 0;
225 union acpi_object *buf = NULL;
226
227 if (pkg->type != ACPI_TYPE_PACKAGE) {
228 WARN_ONCE(1, "BIOS bug, unexpected element type: %d\n",
229 pkg->type);
230 goto err;
231 }
232
233 for (i = 0; i < pkg->package.count; i++) {
234 union acpi_object *obj = &pkg->package.elements[i];
235
236 if (obj->type == ACPI_TYPE_INTEGER)
237 size += 4;
238 else if (obj->type == ACPI_TYPE_BUFFER)
239 size += obj->buffer.length;
240 else {
241 WARN_ONCE(1, "BIOS bug, unexpected element type: %d\n",
242 obj->type);
243 goto err;
244 }
245 }
246
247 buf = ACPI_ALLOCATE(sizeof(*buf) + size);
248 if (!buf)
249 goto err;
250
251 dst = buf + 1;
252 buf->type = ACPI_TYPE_BUFFER;
253 buf->buffer.length = size;
254 buf->buffer.pointer = dst;
255 for (i = 0; i < pkg->package.count; i++) {
256 union acpi_object *obj = &pkg->package.elements[i];
257
258 if (obj->type == ACPI_TYPE_INTEGER) {
259 memcpy(dst, &obj->integer.value, 4);
260 dst += 4;
261 } else if (obj->type == ACPI_TYPE_BUFFER) {
262 memcpy(dst, obj->buffer.pointer, obj->buffer.length);
263 dst += obj->buffer.length;
264 }
265 }
266 err:
267 ACPI_FREE(pkg);
268 return buf;
269 }
270
271 static union acpi_object *int_to_buf(union acpi_object *integer)
272 {
273 union acpi_object *buf = ACPI_ALLOCATE(sizeof(*buf) + 4);
274 void *dst = NULL;
275
276 if (!buf)
277 goto err;
278
279 if (integer->type != ACPI_TYPE_INTEGER) {
280 WARN_ONCE(1, "BIOS bug, unexpected element type: %d\n",
281 integer->type);
282 goto err;
283 }
284
285 dst = buf + 1;
286 buf->type = ACPI_TYPE_BUFFER;
287 buf->buffer.length = 4;
288 buf->buffer.pointer = dst;
289 memcpy(dst, &integer->integer.value, 4);
290 err:
291 ACPI_FREE(integer);
292 return buf;
293 }
294
295 static union acpi_object *acpi_label_write(acpi_handle handle, u32 offset,
296 u32 len, void *data)
297 {
298 acpi_status rc;
299 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
300 struct acpi_object_list input = {
301 .count = 3,
302 .pointer = (union acpi_object []) {
303 [0] = {
304 .integer.type = ACPI_TYPE_INTEGER,
305 .integer.value = offset,
306 },
307 [1] = {
308 .integer.type = ACPI_TYPE_INTEGER,
309 .integer.value = len,
310 },
311 [2] = {
312 .buffer.type = ACPI_TYPE_BUFFER,
313 .buffer.pointer = data,
314 .buffer.length = len,
315 },
316 },
317 };
318
319 rc = acpi_evaluate_object(handle, "_LSW", &input, &buf);
320 if (ACPI_FAILURE(rc))
321 return NULL;
322 return int_to_buf(buf.pointer);
323 }
324
325 static union acpi_object *acpi_label_read(acpi_handle handle, u32 offset,
326 u32 len)
327 {
328 acpi_status rc;
329 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
330 struct acpi_object_list input = {
331 .count = 2,
332 .pointer = (union acpi_object []) {
333 [0] = {
334 .integer.type = ACPI_TYPE_INTEGER,
335 .integer.value = offset,
336 },
337 [1] = {
338 .integer.type = ACPI_TYPE_INTEGER,
339 .integer.value = len,
340 },
341 },
342 };
343
344 rc = acpi_evaluate_object(handle, "_LSR", &input, &buf);
345 if (ACPI_FAILURE(rc))
346 return NULL;
347 return pkg_to_buf(buf.pointer);
348 }
349
350 static union acpi_object *acpi_label_info(acpi_handle handle)
351 {
352 acpi_status rc;
353 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
354
355 rc = acpi_evaluate_object(handle, "_LSI", NULL, &buf);
356 if (ACPI_FAILURE(rc))
357 return NULL;
358 return pkg_to_buf(buf.pointer);
359 }
360
361 static u8 nfit_dsm_revid(unsigned family, unsigned func)
362 {
363 static const u8 revid_table[NVDIMM_FAMILY_MAX+1][NVDIMM_CMD_MAX+1] = {
364 [NVDIMM_FAMILY_INTEL] = {
365 [NVDIMM_INTEL_GET_MODES] = 2,
366 [NVDIMM_INTEL_GET_FWINFO] = 2,
367 [NVDIMM_INTEL_START_FWUPDATE] = 2,
368 [NVDIMM_INTEL_SEND_FWUPDATE] = 2,
369 [NVDIMM_INTEL_FINISH_FWUPDATE] = 2,
370 [NVDIMM_INTEL_QUERY_FWUPDATE] = 2,
371 [NVDIMM_INTEL_SET_THRESHOLD] = 2,
372 [NVDIMM_INTEL_INJECT_ERROR] = 2,
373 [NVDIMM_INTEL_GET_SECURITY_STATE] = 2,
374 [NVDIMM_INTEL_SET_PASSPHRASE] = 2,
375 [NVDIMM_INTEL_DISABLE_PASSPHRASE] = 2,
376 [NVDIMM_INTEL_UNLOCK_UNIT] = 2,
377 [NVDIMM_INTEL_FREEZE_LOCK] = 2,
378 [NVDIMM_INTEL_SECURE_ERASE] = 2,
379 [NVDIMM_INTEL_OVERWRITE] = 2,
380 [NVDIMM_INTEL_QUERY_OVERWRITE] = 2,
381 [NVDIMM_INTEL_SET_MASTER_PASSPHRASE] = 2,
382 [NVDIMM_INTEL_MASTER_SECURE_ERASE] = 2,
383 },
384 };
385 u8 id;
386
387 if (family > NVDIMM_FAMILY_MAX)
388 return 0;
389 if (func > NVDIMM_CMD_MAX)
390 return 0;
391 id = revid_table[family][func];
392 if (id == 0)
393 return 1;
394 return id;
395 }
396
397 static bool payload_dumpable(struct nvdimm *nvdimm, unsigned int func)
398 {
399 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
400
401 if (nfit_mem && nfit_mem->family == NVDIMM_FAMILY_INTEL
402 && func >= NVDIMM_INTEL_GET_SECURITY_STATE
403 && func <= NVDIMM_INTEL_MASTER_SECURE_ERASE)
404 return IS_ENABLED(CONFIG_NFIT_SECURITY_DEBUG);
405 return true;
406 }
407
408 static int cmd_to_func(struct nfit_mem *nfit_mem, unsigned int cmd,
409 struct nd_cmd_pkg *call_pkg)
410 {
411 if (call_pkg) {
412 int i;
413
414 if (nfit_mem && nfit_mem->family != call_pkg->nd_family)
415 return -ENOTTY;
416
417 for (i = 0; i < ARRAY_SIZE(call_pkg->nd_reserved2); i++)
418 if (call_pkg->nd_reserved2[i])
419 return -EINVAL;
420 return call_pkg->nd_command;
421 }
422
423
424 if (!nfit_mem)
425 return cmd;
426
427
428 if (nfit_mem->family == NVDIMM_FAMILY_INTEL)
429 return cmd;
430
431
432
433
434
435 return 0;
436 }
437
438 int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
439 unsigned int cmd, void *buf, unsigned int buf_len, int *cmd_rc)
440 {
441 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
442 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
443 union acpi_object in_obj, in_buf, *out_obj;
444 const struct nd_cmd_desc *desc = NULL;
445 struct device *dev = acpi_desc->dev;
446 struct nd_cmd_pkg *call_pkg = NULL;
447 const char *cmd_name, *dimm_name;
448 unsigned long cmd_mask, dsm_mask;
449 u32 offset, fw_status = 0;
450 acpi_handle handle;
451 const guid_t *guid;
452 int func, rc, i;
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);
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 dsm_mask = nd_desc->bus_dsm_mask;
482 desc = nd_cmd_bus_desc(cmd);
483 guid = to_nfit_uuid(NFIT_DEV_BUS);
484 handle = adev->handle;
485 dimm_name = "bus";
486 }
487
488 if (!desc || (cmd && (desc->out_num + desc->in_num == 0)))
489 return -ENOTTY;
490
491
492
493
494
495 if (cmd == ND_CMD_CALL &&
496 (func > NVDIMM_CMD_MAX || !test_bit(func, &dsm_mask)))
497 return -ENOTTY;
498 else if (!test_bit(cmd, &cmd_mask))
499 return -ENOTTY;
500
501 in_obj.type = ACPI_TYPE_PACKAGE;
502 in_obj.package.count = 1;
503 in_obj.package.elements = &in_buf;
504 in_buf.type = ACPI_TYPE_BUFFER;
505 in_buf.buffer.pointer = buf;
506 in_buf.buffer.length = 0;
507
508
509 for (i = 0; i < desc->in_num; i++)
510 in_buf.buffer.length += nd_cmd_in_size(nvdimm, cmd, desc,
511 i, buf);
512
513 if (call_pkg) {
514
515 in_buf.buffer.pointer = (void *) &call_pkg->nd_payload;
516 in_buf.buffer.length = call_pkg->nd_size_in;
517 }
518
519 dev_dbg(dev, "%s cmd: %d: func: %d input length: %d\n",
520 dimm_name, cmd, func, in_buf.buffer.length);
521 if (payload_dumpable(nvdimm, func))
522 print_hex_dump_debug("nvdimm in ", DUMP_PREFIX_OFFSET, 4, 4,
523 in_buf.buffer.pointer,
524 min_t(u32, 256, in_buf.buffer.length), true);
525
526
527 if (nvdimm && cmd == ND_CMD_GET_CONFIG_SIZE
528 && test_bit(NFIT_MEM_LSR, &nfit_mem->flags))
529 out_obj = acpi_label_info(handle);
530 else if (nvdimm && cmd == ND_CMD_GET_CONFIG_DATA
531 && test_bit(NFIT_MEM_LSR, &nfit_mem->flags)) {
532 struct nd_cmd_get_config_data_hdr *p = buf;
533
534 out_obj = acpi_label_read(handle, p->in_offset, p->in_length);
535 } else if (nvdimm && cmd == ND_CMD_SET_CONFIG_DATA
536 && test_bit(NFIT_MEM_LSW, &nfit_mem->flags)) {
537 struct nd_cmd_set_config_hdr *p = buf;
538
539 out_obj = acpi_label_write(handle, p->in_offset, p->in_length,
540 p->in_buf);
541 } else {
542 u8 revid;
543
544 if (nvdimm)
545 revid = nfit_dsm_revid(nfit_mem->family, func);
546 else
547 revid = 1;
548 out_obj = acpi_evaluate_dsm(handle, guid, revid, func, &in_obj);
549 }
550
551 if (!out_obj) {
552 dev_dbg(dev, "%s _DSM failed cmd: %s\n", dimm_name, cmd_name);
553 return -EINVAL;
554 }
555
556 if (out_obj->type != ACPI_TYPE_BUFFER) {
557 dev_dbg(dev, "%s unexpected output object type cmd: %s type: %d\n",
558 dimm_name, cmd_name, out_obj->type);
559 rc = -EINVAL;
560 goto out;
561 }
562
563 dev_dbg(dev, "%s cmd: %s output length: %d\n", dimm_name,
564 cmd_name, out_obj->buffer.length);
565 print_hex_dump_debug(cmd_name, DUMP_PREFIX_OFFSET, 4, 4,
566 out_obj->buffer.pointer,
567 min_t(u32, 128, out_obj->buffer.length), true);
568
569 if (call_pkg) {
570 call_pkg->nd_fw_size = out_obj->buffer.length;
571 memcpy(call_pkg->nd_payload + call_pkg->nd_size_in,
572 out_obj->buffer.pointer,
573 min(call_pkg->nd_fw_size, call_pkg->nd_size_out));
574
575 ACPI_FREE(out_obj);
576
577
578
579
580
581
582 if (cmd_rc)
583 *cmd_rc = 0;
584 return 0;
585 }
586
587 for (i = 0, offset = 0; i < desc->out_num; i++) {
588 u32 out_size = nd_cmd_out_size(nvdimm, cmd, desc, i, buf,
589 (u32 *) out_obj->buffer.pointer,
590 out_obj->buffer.length - offset);
591
592 if (offset + out_size > out_obj->buffer.length) {
593 dev_dbg(dev, "%s output object underflow cmd: %s field: %d\n",
594 dimm_name, cmd_name, i);
595 break;
596 }
597
598 if (in_buf.buffer.length + offset + out_size > buf_len) {
599 dev_dbg(dev, "%s output overrun cmd: %s field: %d\n",
600 dimm_name, cmd_name, i);
601 rc = -ENXIO;
602 goto out;
603 }
604 memcpy(buf + in_buf.buffer.length + offset,
605 out_obj->buffer.pointer + offset, out_size);
606 offset += out_size;
607 }
608
609
610
611
612
613 if (i >= 1 && ((!nvdimm && cmd >= ND_CMD_ARS_CAP
614 && cmd <= ND_CMD_CLEAR_ERROR)
615 || (nvdimm && cmd >= ND_CMD_SMART
616 && cmd <= ND_CMD_VENDOR)))
617 fw_status = *(u32 *) out_obj->buffer.pointer;
618
619 if (offset + in_buf.buffer.length < buf_len) {
620 if (i >= 1) {
621
622
623
624
625 rc = buf_len - offset - in_buf.buffer.length;
626 if (cmd_rc)
627 *cmd_rc = xlat_status(nvdimm, buf, cmd,
628 fw_status);
629 } else {
630 dev_err(dev, "%s:%s underrun cmd: %s buf_len: %d out_len: %d\n",
631 __func__, dimm_name, cmd_name, buf_len,
632 offset);
633 rc = -ENXIO;
634 }
635 } else {
636 rc = 0;
637 if (cmd_rc)
638 *cmd_rc = xlat_status(nvdimm, buf, cmd, fw_status);
639 }
640
641 out:
642 ACPI_FREE(out_obj);
643
644 return rc;
645 }
646 EXPORT_SYMBOL_GPL(acpi_nfit_ctl);
647
648 static const char *spa_type_name(u16 type)
649 {
650 static const char *to_name[] = {
651 [NFIT_SPA_VOLATILE] = "volatile",
652 [NFIT_SPA_PM] = "pmem",
653 [NFIT_SPA_DCR] = "dimm-control-region",
654 [NFIT_SPA_BDW] = "block-data-window",
655 [NFIT_SPA_VDISK] = "volatile-disk",
656 [NFIT_SPA_VCD] = "volatile-cd",
657 [NFIT_SPA_PDISK] = "persistent-disk",
658 [NFIT_SPA_PCD] = "persistent-cd",
659
660 };
661
662 if (type > NFIT_SPA_PCD)
663 return "unknown";
664
665 return to_name[type];
666 }
667
668 int nfit_spa_type(struct acpi_nfit_system_address *spa)
669 {
670 int i;
671
672 for (i = 0; i < NFIT_UUID_MAX; i++)
673 if (guid_equal(to_nfit_uuid(i), (guid_t *)&spa->range_guid))
674 return i;
675 return -1;
676 }
677
678 static bool add_spa(struct acpi_nfit_desc *acpi_desc,
679 struct nfit_table_prev *prev,
680 struct acpi_nfit_system_address *spa)
681 {
682 struct device *dev = acpi_desc->dev;
683 struct nfit_spa *nfit_spa;
684
685 if (spa->header.length != sizeof(*spa))
686 return false;
687
688 list_for_each_entry(nfit_spa, &prev->spas, list) {
689 if (memcmp(nfit_spa->spa, spa, sizeof(*spa)) == 0) {
690 list_move_tail(&nfit_spa->list, &acpi_desc->spas);
691 return true;
692 }
693 }
694
695 nfit_spa = devm_kzalloc(dev, sizeof(*nfit_spa) + sizeof(*spa),
696 GFP_KERNEL);
697 if (!nfit_spa)
698 return false;
699 INIT_LIST_HEAD(&nfit_spa->list);
700 memcpy(nfit_spa->spa, spa, sizeof(*spa));
701 list_add_tail(&nfit_spa->list, &acpi_desc->spas);
702 dev_dbg(dev, "spa index: %d type: %s\n",
703 spa->range_index,
704 spa_type_name(nfit_spa_type(spa)));
705 return true;
706 }
707
708 static bool add_memdev(struct acpi_nfit_desc *acpi_desc,
709 struct nfit_table_prev *prev,
710 struct acpi_nfit_memory_map *memdev)
711 {
712 struct device *dev = acpi_desc->dev;
713 struct nfit_memdev *nfit_memdev;
714
715 if (memdev->header.length != sizeof(*memdev))
716 return false;
717
718 list_for_each_entry(nfit_memdev, &prev->memdevs, list)
719 if (memcmp(nfit_memdev->memdev, memdev, sizeof(*memdev)) == 0) {
720 list_move_tail(&nfit_memdev->list, &acpi_desc->memdevs);
721 return true;
722 }
723
724 nfit_memdev = devm_kzalloc(dev, sizeof(*nfit_memdev) + sizeof(*memdev),
725 GFP_KERNEL);
726 if (!nfit_memdev)
727 return false;
728 INIT_LIST_HEAD(&nfit_memdev->list);
729 memcpy(nfit_memdev->memdev, memdev, sizeof(*memdev));
730 list_add_tail(&nfit_memdev->list, &acpi_desc->memdevs);
731 dev_dbg(dev, "memdev handle: %#x spa: %d dcr: %d flags: %#x\n",
732 memdev->device_handle, memdev->range_index,
733 memdev->region_index, memdev->flags);
734 return true;
735 }
736
737 int nfit_get_smbios_id(u32 device_handle, u16 *flags)
738 {
739 struct acpi_nfit_memory_map *memdev;
740 struct acpi_nfit_desc *acpi_desc;
741 struct nfit_mem *nfit_mem;
742 u16 physical_id;
743
744 mutex_lock(&acpi_desc_lock);
745 list_for_each_entry(acpi_desc, &acpi_descs, list) {
746 mutex_lock(&acpi_desc->init_mutex);
747 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
748 memdev = __to_nfit_memdev(nfit_mem);
749 if (memdev->device_handle == device_handle) {
750 *flags = memdev->flags;
751 physical_id = memdev->physical_id;
752 mutex_unlock(&acpi_desc->init_mutex);
753 mutex_unlock(&acpi_desc_lock);
754 return physical_id;
755 }
756 }
757 mutex_unlock(&acpi_desc->init_mutex);
758 }
759 mutex_unlock(&acpi_desc_lock);
760
761 return -ENODEV;
762 }
763 EXPORT_SYMBOL_GPL(nfit_get_smbios_id);
764
765
766
767
768
769 static size_t sizeof_dcr(struct acpi_nfit_control_region *dcr)
770 {
771 if (dcr->header.length < offsetof(struct acpi_nfit_control_region,
772 window_size))
773 return 0;
774 if (dcr->windows)
775 return sizeof(*dcr);
776 return offsetof(struct acpi_nfit_control_region, window_size);
777 }
778
779 static bool add_dcr(struct acpi_nfit_desc *acpi_desc,
780 struct nfit_table_prev *prev,
781 struct acpi_nfit_control_region *dcr)
782 {
783 struct device *dev = acpi_desc->dev;
784 struct nfit_dcr *nfit_dcr;
785
786 if (!sizeof_dcr(dcr))
787 return false;
788
789 list_for_each_entry(nfit_dcr, &prev->dcrs, list)
790 if (memcmp(nfit_dcr->dcr, dcr, sizeof_dcr(dcr)) == 0) {
791 list_move_tail(&nfit_dcr->list, &acpi_desc->dcrs);
792 return true;
793 }
794
795 nfit_dcr = devm_kzalloc(dev, sizeof(*nfit_dcr) + sizeof(*dcr),
796 GFP_KERNEL);
797 if (!nfit_dcr)
798 return false;
799 INIT_LIST_HEAD(&nfit_dcr->list);
800 memcpy(nfit_dcr->dcr, dcr, sizeof_dcr(dcr));
801 list_add_tail(&nfit_dcr->list, &acpi_desc->dcrs);
802 dev_dbg(dev, "dcr index: %d windows: %d\n",
803 dcr->region_index, dcr->windows);
804 return true;
805 }
806
807 static bool add_bdw(struct acpi_nfit_desc *acpi_desc,
808 struct nfit_table_prev *prev,
809 struct acpi_nfit_data_region *bdw)
810 {
811 struct device *dev = acpi_desc->dev;
812 struct nfit_bdw *nfit_bdw;
813
814 if (bdw->header.length != sizeof(*bdw))
815 return false;
816 list_for_each_entry(nfit_bdw, &prev->bdws, list)
817 if (memcmp(nfit_bdw->bdw, bdw, sizeof(*bdw)) == 0) {
818 list_move_tail(&nfit_bdw->list, &acpi_desc->bdws);
819 return true;
820 }
821
822 nfit_bdw = devm_kzalloc(dev, sizeof(*nfit_bdw) + sizeof(*bdw),
823 GFP_KERNEL);
824 if (!nfit_bdw)
825 return false;
826 INIT_LIST_HEAD(&nfit_bdw->list);
827 memcpy(nfit_bdw->bdw, bdw, sizeof(*bdw));
828 list_add_tail(&nfit_bdw->list, &acpi_desc->bdws);
829 dev_dbg(dev, "bdw dcr: %d windows: %d\n",
830 bdw->region_index, bdw->windows);
831 return true;
832 }
833
834 static size_t sizeof_idt(struct acpi_nfit_interleave *idt)
835 {
836 if (idt->header.length < sizeof(*idt))
837 return 0;
838 return sizeof(*idt) + sizeof(u32) * (idt->line_count - 1);
839 }
840
841 static bool add_idt(struct acpi_nfit_desc *acpi_desc,
842 struct nfit_table_prev *prev,
843 struct acpi_nfit_interleave *idt)
844 {
845 struct device *dev = acpi_desc->dev;
846 struct nfit_idt *nfit_idt;
847
848 if (!sizeof_idt(idt))
849 return false;
850
851 list_for_each_entry(nfit_idt, &prev->idts, list) {
852 if (sizeof_idt(nfit_idt->idt) != sizeof_idt(idt))
853 continue;
854
855 if (memcmp(nfit_idt->idt, idt, sizeof_idt(idt)) == 0) {
856 list_move_tail(&nfit_idt->list, &acpi_desc->idts);
857 return true;
858 }
859 }
860
861 nfit_idt = devm_kzalloc(dev, sizeof(*nfit_idt) + sizeof_idt(idt),
862 GFP_KERNEL);
863 if (!nfit_idt)
864 return false;
865 INIT_LIST_HEAD(&nfit_idt->list);
866 memcpy(nfit_idt->idt, idt, sizeof_idt(idt));
867 list_add_tail(&nfit_idt->list, &acpi_desc->idts);
868 dev_dbg(dev, "idt index: %d num_lines: %d\n",
869 idt->interleave_index, idt->line_count);
870 return true;
871 }
872
873 static size_t sizeof_flush(struct acpi_nfit_flush_address *flush)
874 {
875 if (flush->header.length < sizeof(*flush))
876 return 0;
877 return sizeof(*flush) + sizeof(u64) * (flush->hint_count - 1);
878 }
879
880 static bool add_flush(struct acpi_nfit_desc *acpi_desc,
881 struct nfit_table_prev *prev,
882 struct acpi_nfit_flush_address *flush)
883 {
884 struct device *dev = acpi_desc->dev;
885 struct nfit_flush *nfit_flush;
886
887 if (!sizeof_flush(flush))
888 return false;
889
890 list_for_each_entry(nfit_flush, &prev->flushes, list) {
891 if (sizeof_flush(nfit_flush->flush) != sizeof_flush(flush))
892 continue;
893
894 if (memcmp(nfit_flush->flush, flush,
895 sizeof_flush(flush)) == 0) {
896 list_move_tail(&nfit_flush->list, &acpi_desc->flushes);
897 return true;
898 }
899 }
900
901 nfit_flush = devm_kzalloc(dev, sizeof(*nfit_flush)
902 + sizeof_flush(flush), GFP_KERNEL);
903 if (!nfit_flush)
904 return false;
905 INIT_LIST_HEAD(&nfit_flush->list);
906 memcpy(nfit_flush->flush, flush, sizeof_flush(flush));
907 list_add_tail(&nfit_flush->list, &acpi_desc->flushes);
908 dev_dbg(dev, "nfit_flush handle: %d hint_count: %d\n",
909 flush->device_handle, flush->hint_count);
910 return true;
911 }
912
913 static bool add_platform_cap(struct acpi_nfit_desc *acpi_desc,
914 struct acpi_nfit_capabilities *pcap)
915 {
916 struct device *dev = acpi_desc->dev;
917 u32 mask;
918
919 mask = (1 << (pcap->highest_capability + 1)) - 1;
920 acpi_desc->platform_cap = pcap->capabilities & mask;
921 dev_dbg(dev, "cap: %#x\n", acpi_desc->platform_cap);
922 return true;
923 }
924
925 static void *add_table(struct acpi_nfit_desc *acpi_desc,
926 struct nfit_table_prev *prev, void *table, const void *end)
927 {
928 struct device *dev = acpi_desc->dev;
929 struct acpi_nfit_header *hdr;
930 void *err = ERR_PTR(-ENOMEM);
931
932 if (table >= end)
933 return NULL;
934
935 hdr = table;
936 if (!hdr->length) {
937 dev_warn(dev, "found a zero length table '%d' parsing nfit\n",
938 hdr->type);
939 return NULL;
940 }
941
942 switch (hdr->type) {
943 case ACPI_NFIT_TYPE_SYSTEM_ADDRESS:
944 if (!add_spa(acpi_desc, prev, table))
945 return err;
946 break;
947 case ACPI_NFIT_TYPE_MEMORY_MAP:
948 if (!add_memdev(acpi_desc, prev, table))
949 return err;
950 break;
951 case ACPI_NFIT_TYPE_CONTROL_REGION:
952 if (!add_dcr(acpi_desc, prev, table))
953 return err;
954 break;
955 case ACPI_NFIT_TYPE_DATA_REGION:
956 if (!add_bdw(acpi_desc, prev, table))
957 return err;
958 break;
959 case ACPI_NFIT_TYPE_INTERLEAVE:
960 if (!add_idt(acpi_desc, prev, table))
961 return err;
962 break;
963 case ACPI_NFIT_TYPE_FLUSH_ADDRESS:
964 if (!add_flush(acpi_desc, prev, table))
965 return err;
966 break;
967 case ACPI_NFIT_TYPE_SMBIOS:
968 dev_dbg(dev, "smbios\n");
969 break;
970 case ACPI_NFIT_TYPE_CAPABILITIES:
971 if (!add_platform_cap(acpi_desc, table))
972 return err;
973 break;
974 default:
975 dev_err(dev, "unknown table '%d' parsing nfit\n", hdr->type);
976 break;
977 }
978
979 return table + hdr->length;
980 }
981
982 static void nfit_mem_find_spa_bdw(struct acpi_nfit_desc *acpi_desc,
983 struct nfit_mem *nfit_mem)
984 {
985 u32 device_handle = __to_nfit_memdev(nfit_mem)->device_handle;
986 u16 dcr = nfit_mem->dcr->region_index;
987 struct nfit_spa *nfit_spa;
988
989 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
990 u16 range_index = nfit_spa->spa->range_index;
991 int type = nfit_spa_type(nfit_spa->spa);
992 struct nfit_memdev *nfit_memdev;
993
994 if (type != NFIT_SPA_BDW)
995 continue;
996
997 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
998 if (nfit_memdev->memdev->range_index != range_index)
999 continue;
1000 if (nfit_memdev->memdev->device_handle != device_handle)
1001 continue;
1002 if (nfit_memdev->memdev->region_index != dcr)
1003 continue;
1004
1005 nfit_mem->spa_bdw = nfit_spa->spa;
1006 return;
1007 }
1008 }
1009
1010 dev_dbg(acpi_desc->dev, "SPA-BDW not found for SPA-DCR %d\n",
1011 nfit_mem->spa_dcr->range_index);
1012 nfit_mem->bdw = NULL;
1013 }
1014
1015 static void nfit_mem_init_bdw(struct acpi_nfit_desc *acpi_desc,
1016 struct nfit_mem *nfit_mem, struct acpi_nfit_system_address *spa)
1017 {
1018 u16 dcr = __to_nfit_memdev(nfit_mem)->region_index;
1019 struct nfit_memdev *nfit_memdev;
1020 struct nfit_bdw *nfit_bdw;
1021 struct nfit_idt *nfit_idt;
1022 u16 idt_idx, range_index;
1023
1024 list_for_each_entry(nfit_bdw, &acpi_desc->bdws, list) {
1025 if (nfit_bdw->bdw->region_index != dcr)
1026 continue;
1027 nfit_mem->bdw = nfit_bdw->bdw;
1028 break;
1029 }
1030
1031 if (!nfit_mem->bdw)
1032 return;
1033
1034 nfit_mem_find_spa_bdw(acpi_desc, nfit_mem);
1035
1036 if (!nfit_mem->spa_bdw)
1037 return;
1038
1039 range_index = nfit_mem->spa_bdw->range_index;
1040 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
1041 if (nfit_memdev->memdev->range_index != range_index ||
1042 nfit_memdev->memdev->region_index != dcr)
1043 continue;
1044 nfit_mem->memdev_bdw = nfit_memdev->memdev;
1045 idt_idx = nfit_memdev->memdev->interleave_index;
1046 list_for_each_entry(nfit_idt, &acpi_desc->idts, list) {
1047 if (nfit_idt->idt->interleave_index != idt_idx)
1048 continue;
1049 nfit_mem->idt_bdw = nfit_idt->idt;
1050 break;
1051 }
1052 break;
1053 }
1054 }
1055
1056 static int __nfit_mem_init(struct acpi_nfit_desc *acpi_desc,
1057 struct acpi_nfit_system_address *spa)
1058 {
1059 struct nfit_mem *nfit_mem, *found;
1060 struct nfit_memdev *nfit_memdev;
1061 int type = spa ? nfit_spa_type(spa) : 0;
1062
1063 switch (type) {
1064 case NFIT_SPA_DCR:
1065 case NFIT_SPA_PM:
1066 break;
1067 default:
1068 if (spa)
1069 return 0;
1070 }
1071
1072
1073
1074
1075
1076
1077
1078
1079 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
1080 struct nfit_flush *nfit_flush;
1081 struct nfit_dcr *nfit_dcr;
1082 u32 device_handle;
1083 u16 dcr;
1084
1085 if (spa && nfit_memdev->memdev->range_index != spa->range_index)
1086 continue;
1087 if (!spa && nfit_memdev->memdev->range_index)
1088 continue;
1089 found = NULL;
1090 dcr = nfit_memdev->memdev->region_index;
1091 device_handle = nfit_memdev->memdev->device_handle;
1092 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list)
1093 if (__to_nfit_memdev(nfit_mem)->device_handle
1094 == device_handle) {
1095 found = nfit_mem;
1096 break;
1097 }
1098
1099 if (found)
1100 nfit_mem = found;
1101 else {
1102 nfit_mem = devm_kzalloc(acpi_desc->dev,
1103 sizeof(*nfit_mem), GFP_KERNEL);
1104 if (!nfit_mem)
1105 return -ENOMEM;
1106 INIT_LIST_HEAD(&nfit_mem->list);
1107 nfit_mem->acpi_desc = acpi_desc;
1108 list_add(&nfit_mem->list, &acpi_desc->dimms);
1109 }
1110
1111 list_for_each_entry(nfit_dcr, &acpi_desc->dcrs, list) {
1112 if (nfit_dcr->dcr->region_index != dcr)
1113 continue;
1114
1115
1116
1117
1118
1119
1120
1121 if (!nfit_mem->dcr)
1122 nfit_mem->dcr = nfit_dcr->dcr;
1123 else if (nfit_mem->dcr->windows == 0
1124 && nfit_dcr->dcr->windows)
1125 nfit_mem->dcr = nfit_dcr->dcr;
1126 break;
1127 }
1128
1129 list_for_each_entry(nfit_flush, &acpi_desc->flushes, list) {
1130 struct acpi_nfit_flush_address *flush;
1131 u16 i;
1132
1133 if (nfit_flush->flush->device_handle != device_handle)
1134 continue;
1135 nfit_mem->nfit_flush = nfit_flush;
1136 flush = nfit_flush->flush;
1137 nfit_mem->flush_wpq = devm_kcalloc(acpi_desc->dev,
1138 flush->hint_count,
1139 sizeof(struct resource),
1140 GFP_KERNEL);
1141 if (!nfit_mem->flush_wpq)
1142 return -ENOMEM;
1143 for (i = 0; i < flush->hint_count; i++) {
1144 struct resource *res = &nfit_mem->flush_wpq[i];
1145
1146 res->start = flush->hint_address[i];
1147 res->end = res->start + 8 - 1;
1148 }
1149 break;
1150 }
1151
1152 if (dcr && !nfit_mem->dcr) {
1153 dev_err(acpi_desc->dev, "SPA %d missing DCR %d\n",
1154 spa->range_index, dcr);
1155 return -ENODEV;
1156 }
1157
1158 if (type == NFIT_SPA_DCR) {
1159 struct nfit_idt *nfit_idt;
1160 u16 idt_idx;
1161
1162
1163 nfit_mem->spa_dcr = spa;
1164 nfit_mem->memdev_dcr = nfit_memdev->memdev;
1165 idt_idx = nfit_memdev->memdev->interleave_index;
1166 list_for_each_entry(nfit_idt, &acpi_desc->idts, list) {
1167 if (nfit_idt->idt->interleave_index != idt_idx)
1168 continue;
1169 nfit_mem->idt_dcr = nfit_idt->idt;
1170 break;
1171 }
1172 nfit_mem_init_bdw(acpi_desc, nfit_mem, spa);
1173 } else if (type == NFIT_SPA_PM) {
1174
1175
1176
1177
1178
1179 nfit_mem->memdev_pmem = nfit_memdev->memdev;
1180 } else
1181 nfit_mem->memdev_dcr = nfit_memdev->memdev;
1182 }
1183
1184 return 0;
1185 }
1186
1187 static int nfit_mem_cmp(void *priv, struct list_head *_a, struct list_head *_b)
1188 {
1189 struct nfit_mem *a = container_of(_a, typeof(*a), list);
1190 struct nfit_mem *b = container_of(_b, typeof(*b), list);
1191 u32 handleA, handleB;
1192
1193 handleA = __to_nfit_memdev(a)->device_handle;
1194 handleB = __to_nfit_memdev(b)->device_handle;
1195 if (handleA < handleB)
1196 return -1;
1197 else if (handleA > handleB)
1198 return 1;
1199 return 0;
1200 }
1201
1202 static int nfit_mem_init(struct acpi_nfit_desc *acpi_desc)
1203 {
1204 struct nfit_spa *nfit_spa;
1205 int rc;
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
1217 rc = __nfit_mem_init(acpi_desc, nfit_spa->spa);
1218 if (rc)
1219 return rc;
1220 }
1221
1222
1223
1224
1225
1226
1227 rc = __nfit_mem_init(acpi_desc, NULL);
1228 if (rc)
1229 return rc;
1230
1231 list_sort(NULL, &acpi_desc->dimms, nfit_mem_cmp);
1232
1233 return 0;
1234 }
1235
1236 static ssize_t bus_dsm_mask_show(struct device *dev,
1237 struct device_attribute *attr, char *buf)
1238 {
1239 struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
1240 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
1241
1242 return sprintf(buf, "%#lx\n", nd_desc->bus_dsm_mask);
1243 }
1244 static struct device_attribute dev_attr_bus_dsm_mask =
1245 __ATTR(dsm_mask, 0444, bus_dsm_mask_show, NULL);
1246
1247 static ssize_t revision_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, "%d\n", acpi_desc->acpi_header.revision);
1255 }
1256 static DEVICE_ATTR_RO(revision);
1257
1258 static ssize_t hw_error_scrub_show(struct device *dev,
1259 struct device_attribute *attr, char *buf)
1260 {
1261 struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
1262 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
1263 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1264
1265 return sprintf(buf, "%d\n", acpi_desc->scrub_mode);
1266 }
1267
1268
1269
1270
1271
1272
1273
1274
1275 static ssize_t hw_error_scrub_store(struct device *dev,
1276 struct device_attribute *attr, const char *buf, size_t size)
1277 {
1278 struct nvdimm_bus_descriptor *nd_desc;
1279 ssize_t rc;
1280 long val;
1281
1282 rc = kstrtol(buf, 0, &val);
1283 if (rc)
1284 return rc;
1285
1286 nfit_device_lock(dev);
1287 nd_desc = dev_get_drvdata(dev);
1288 if (nd_desc) {
1289 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1290
1291 switch (val) {
1292 case HW_ERROR_SCRUB_ON:
1293 acpi_desc->scrub_mode = HW_ERROR_SCRUB_ON;
1294 break;
1295 case HW_ERROR_SCRUB_OFF:
1296 acpi_desc->scrub_mode = HW_ERROR_SCRUB_OFF;
1297 break;
1298 default:
1299 rc = -EINVAL;
1300 break;
1301 }
1302 }
1303 nfit_device_unlock(dev);
1304 if (rc)
1305 return rc;
1306 return size;
1307 }
1308 static DEVICE_ATTR_RW(hw_error_scrub);
1309
1310
1311
1312
1313
1314
1315 static ssize_t scrub_show(struct device *dev,
1316 struct device_attribute *attr, char *buf)
1317 {
1318 struct nvdimm_bus_descriptor *nd_desc;
1319 struct acpi_nfit_desc *acpi_desc;
1320 ssize_t rc = -ENXIO;
1321 bool busy;
1322
1323 nfit_device_lock(dev);
1324 nd_desc = dev_get_drvdata(dev);
1325 if (!nd_desc) {
1326 nfit_device_unlock(dev);
1327 return rc;
1328 }
1329 acpi_desc = to_acpi_desc(nd_desc);
1330
1331 mutex_lock(&acpi_desc->init_mutex);
1332 busy = test_bit(ARS_BUSY, &acpi_desc->scrub_flags)
1333 && !test_bit(ARS_CANCEL, &acpi_desc->scrub_flags);
1334 rc = sprintf(buf, "%d%s", acpi_desc->scrub_count, busy ? "+\n" : "\n");
1335
1336 if (busy && capable(CAP_SYS_RAWIO) && !test_and_set_bit(ARS_POLL,
1337 &acpi_desc->scrub_flags)) {
1338 acpi_desc->scrub_tmo = 1;
1339 mod_delayed_work(nfit_wq, &acpi_desc->dwork, HZ);
1340 }
1341
1342 mutex_unlock(&acpi_desc->init_mutex);
1343 nfit_device_unlock(dev);
1344 return rc;
1345 }
1346
1347 static ssize_t scrub_store(struct device *dev,
1348 struct device_attribute *attr, const char *buf, size_t size)
1349 {
1350 struct nvdimm_bus_descriptor *nd_desc;
1351 ssize_t rc;
1352 long val;
1353
1354 rc = kstrtol(buf, 0, &val);
1355 if (rc)
1356 return rc;
1357 if (val != 1)
1358 return -EINVAL;
1359
1360 nfit_device_lock(dev);
1361 nd_desc = dev_get_drvdata(dev);
1362 if (nd_desc) {
1363 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
1364
1365 rc = acpi_nfit_ars_rescan(acpi_desc, ARS_REQ_LONG);
1366 }
1367 nfit_device_unlock(dev);
1368 if (rc)
1369 return rc;
1370 return size;
1371 }
1372 static DEVICE_ATTR_RW(scrub);
1373
1374 static bool ars_supported(struct nvdimm_bus *nvdimm_bus)
1375 {
1376 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
1377 const unsigned long mask = 1 << ND_CMD_ARS_CAP | 1 << ND_CMD_ARS_START
1378 | 1 << ND_CMD_ARS_STATUS;
1379
1380 return (nd_desc->cmd_mask & mask) == mask;
1381 }
1382
1383 static umode_t nfit_visible(struct kobject *kobj, struct attribute *a, int n)
1384 {
1385 struct device *dev = container_of(kobj, struct device, kobj);
1386 struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
1387
1388 if (a == &dev_attr_scrub.attr && !ars_supported(nvdimm_bus))
1389 return 0;
1390 return a->mode;
1391 }
1392
1393 static struct attribute *acpi_nfit_attributes[] = {
1394 &dev_attr_revision.attr,
1395 &dev_attr_scrub.attr,
1396 &dev_attr_hw_error_scrub.attr,
1397 &dev_attr_bus_dsm_mask.attr,
1398 NULL,
1399 };
1400
1401 static const struct attribute_group acpi_nfit_attribute_group = {
1402 .name = "nfit",
1403 .attrs = acpi_nfit_attributes,
1404 .is_visible = nfit_visible,
1405 };
1406
1407 static const struct attribute_group *acpi_nfit_attribute_groups[] = {
1408 &nvdimm_bus_attribute_group,
1409 &acpi_nfit_attribute_group,
1410 NULL,
1411 };
1412
1413 static struct acpi_nfit_memory_map *to_nfit_memdev(struct device *dev)
1414 {
1415 struct nvdimm *nvdimm = to_nvdimm(dev);
1416 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1417
1418 return __to_nfit_memdev(nfit_mem);
1419 }
1420
1421 static struct acpi_nfit_control_region *to_nfit_dcr(struct device *dev)
1422 {
1423 struct nvdimm *nvdimm = to_nvdimm(dev);
1424 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1425
1426 return nfit_mem->dcr;
1427 }
1428
1429 static ssize_t handle_show(struct device *dev,
1430 struct device_attribute *attr, char *buf)
1431 {
1432 struct acpi_nfit_memory_map *memdev = to_nfit_memdev(dev);
1433
1434 return sprintf(buf, "%#x\n", memdev->device_handle);
1435 }
1436 static DEVICE_ATTR_RO(handle);
1437
1438 static ssize_t phys_id_show(struct device *dev,
1439 struct device_attribute *attr, char *buf)
1440 {
1441 struct acpi_nfit_memory_map *memdev = to_nfit_memdev(dev);
1442
1443 return sprintf(buf, "%#x\n", memdev->physical_id);
1444 }
1445 static DEVICE_ATTR_RO(phys_id);
1446
1447 static ssize_t vendor_show(struct device *dev,
1448 struct device_attribute *attr, char *buf)
1449 {
1450 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1451
1452 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->vendor_id));
1453 }
1454 static DEVICE_ATTR_RO(vendor);
1455
1456 static ssize_t rev_id_show(struct device *dev,
1457 struct device_attribute *attr, char *buf)
1458 {
1459 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1460
1461 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->revision_id));
1462 }
1463 static DEVICE_ATTR_RO(rev_id);
1464
1465 static ssize_t device_show(struct device *dev,
1466 struct device_attribute *attr, char *buf)
1467 {
1468 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1469
1470 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->device_id));
1471 }
1472 static DEVICE_ATTR_RO(device);
1473
1474 static ssize_t subsystem_vendor_show(struct device *dev,
1475 struct device_attribute *attr, char *buf)
1476 {
1477 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1478
1479 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->subsystem_vendor_id));
1480 }
1481 static DEVICE_ATTR_RO(subsystem_vendor);
1482
1483 static ssize_t subsystem_rev_id_show(struct device *dev,
1484 struct device_attribute *attr, char *buf)
1485 {
1486 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1487
1488 return sprintf(buf, "0x%04x\n",
1489 be16_to_cpu(dcr->subsystem_revision_id));
1490 }
1491 static DEVICE_ATTR_RO(subsystem_rev_id);
1492
1493 static ssize_t subsystem_device_show(struct device *dev,
1494 struct device_attribute *attr, char *buf)
1495 {
1496 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1497
1498 return sprintf(buf, "0x%04x\n", be16_to_cpu(dcr->subsystem_device_id));
1499 }
1500 static DEVICE_ATTR_RO(subsystem_device);
1501
1502 static int num_nvdimm_formats(struct nvdimm *nvdimm)
1503 {
1504 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1505 int formats = 0;
1506
1507 if (nfit_mem->memdev_pmem)
1508 formats++;
1509 if (nfit_mem->memdev_bdw)
1510 formats++;
1511 return formats;
1512 }
1513
1514 static ssize_t format_show(struct device *dev,
1515 struct device_attribute *attr, char *buf)
1516 {
1517 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1518
1519 return sprintf(buf, "0x%04x\n", le16_to_cpu(dcr->code));
1520 }
1521 static DEVICE_ATTR_RO(format);
1522
1523 static ssize_t format1_show(struct device *dev,
1524 struct device_attribute *attr, char *buf)
1525 {
1526 u32 handle;
1527 ssize_t rc = -ENXIO;
1528 struct nfit_mem *nfit_mem;
1529 struct nfit_memdev *nfit_memdev;
1530 struct acpi_nfit_desc *acpi_desc;
1531 struct nvdimm *nvdimm = to_nvdimm(dev);
1532 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1533
1534 nfit_mem = nvdimm_provider_data(nvdimm);
1535 acpi_desc = nfit_mem->acpi_desc;
1536 handle = to_nfit_memdev(dev)->device_handle;
1537
1538
1539 mutex_lock(&acpi_desc->init_mutex);
1540 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
1541 struct acpi_nfit_memory_map *memdev = nfit_memdev->memdev;
1542 struct nfit_dcr *nfit_dcr;
1543
1544 if (memdev->device_handle != handle)
1545 continue;
1546
1547 list_for_each_entry(nfit_dcr, &acpi_desc->dcrs, list) {
1548 if (nfit_dcr->dcr->region_index != memdev->region_index)
1549 continue;
1550 if (nfit_dcr->dcr->code == dcr->code)
1551 continue;
1552 rc = sprintf(buf, "0x%04x\n",
1553 le16_to_cpu(nfit_dcr->dcr->code));
1554 break;
1555 }
1556 if (rc != ENXIO)
1557 break;
1558 }
1559 mutex_unlock(&acpi_desc->init_mutex);
1560 return rc;
1561 }
1562 static DEVICE_ATTR_RO(format1);
1563
1564 static ssize_t formats_show(struct device *dev,
1565 struct device_attribute *attr, char *buf)
1566 {
1567 struct nvdimm *nvdimm = to_nvdimm(dev);
1568
1569 return sprintf(buf, "%d\n", num_nvdimm_formats(nvdimm));
1570 }
1571 static DEVICE_ATTR_RO(formats);
1572
1573 static ssize_t serial_show(struct device *dev,
1574 struct device_attribute *attr, char *buf)
1575 {
1576 struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev);
1577
1578 return sprintf(buf, "0x%08x\n", be32_to_cpu(dcr->serial_number));
1579 }
1580 static DEVICE_ATTR_RO(serial);
1581
1582 static ssize_t family_show(struct device *dev,
1583 struct device_attribute *attr, char *buf)
1584 {
1585 struct nvdimm *nvdimm = to_nvdimm(dev);
1586 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1587
1588 if (nfit_mem->family < 0)
1589 return -ENXIO;
1590 return sprintf(buf, "%d\n", nfit_mem->family);
1591 }
1592 static DEVICE_ATTR_RO(family);
1593
1594 static ssize_t dsm_mask_show(struct device *dev,
1595 struct device_attribute *attr, char *buf)
1596 {
1597 struct nvdimm *nvdimm = to_nvdimm(dev);
1598 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1599
1600 if (nfit_mem->family < 0)
1601 return -ENXIO;
1602 return sprintf(buf, "%#lx\n", nfit_mem->dsm_mask);
1603 }
1604 static DEVICE_ATTR_RO(dsm_mask);
1605
1606 static ssize_t flags_show(struct device *dev,
1607 struct device_attribute *attr, char *buf)
1608 {
1609 struct nvdimm *nvdimm = to_nvdimm(dev);
1610 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1611 u16 flags = __to_nfit_memdev(nfit_mem)->flags;
1612
1613 if (test_bit(NFIT_MEM_DIRTY, &nfit_mem->flags))
1614 flags |= ACPI_NFIT_MEM_FLUSH_FAILED;
1615
1616 return sprintf(buf, "%s%s%s%s%s%s%s\n",
1617 flags & ACPI_NFIT_MEM_SAVE_FAILED ? "save_fail " : "",
1618 flags & ACPI_NFIT_MEM_RESTORE_FAILED ? "restore_fail " : "",
1619 flags & ACPI_NFIT_MEM_FLUSH_FAILED ? "flush_fail " : "",
1620 flags & ACPI_NFIT_MEM_NOT_ARMED ? "not_armed " : "",
1621 flags & ACPI_NFIT_MEM_HEALTH_OBSERVED ? "smart_event " : "",
1622 flags & ACPI_NFIT_MEM_MAP_FAILED ? "map_fail " : "",
1623 flags & ACPI_NFIT_MEM_HEALTH_ENABLED ? "smart_notify " : "");
1624 }
1625 static DEVICE_ATTR_RO(flags);
1626
1627 static ssize_t id_show(struct device *dev,
1628 struct device_attribute *attr, char *buf)
1629 {
1630 struct nvdimm *nvdimm = to_nvdimm(dev);
1631 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1632
1633 return sprintf(buf, "%s\n", nfit_mem->id);
1634 }
1635 static DEVICE_ATTR_RO(id);
1636
1637 static ssize_t dirty_shutdown_show(struct device *dev,
1638 struct device_attribute *attr, char *buf)
1639 {
1640 struct nvdimm *nvdimm = to_nvdimm(dev);
1641 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1642
1643 return sprintf(buf, "%d\n", nfit_mem->dirty_shutdown);
1644 }
1645 static DEVICE_ATTR_RO(dirty_shutdown);
1646
1647 static struct attribute *acpi_nfit_dimm_attributes[] = {
1648 &dev_attr_handle.attr,
1649 &dev_attr_phys_id.attr,
1650 &dev_attr_vendor.attr,
1651 &dev_attr_device.attr,
1652 &dev_attr_rev_id.attr,
1653 &dev_attr_subsystem_vendor.attr,
1654 &dev_attr_subsystem_device.attr,
1655 &dev_attr_subsystem_rev_id.attr,
1656 &dev_attr_format.attr,
1657 &dev_attr_formats.attr,
1658 &dev_attr_format1.attr,
1659 &dev_attr_serial.attr,
1660 &dev_attr_flags.attr,
1661 &dev_attr_id.attr,
1662 &dev_attr_family.attr,
1663 &dev_attr_dsm_mask.attr,
1664 &dev_attr_dirty_shutdown.attr,
1665 NULL,
1666 };
1667
1668 static umode_t acpi_nfit_dimm_attr_visible(struct kobject *kobj,
1669 struct attribute *a, int n)
1670 {
1671 struct device *dev = container_of(kobj, struct device, kobj);
1672 struct nvdimm *nvdimm = to_nvdimm(dev);
1673 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
1674
1675 if (!to_nfit_dcr(dev)) {
1676
1677 if (a == &dev_attr_handle.attr || a == &dev_attr_phys_id.attr
1678 || a == &dev_attr_flags.attr
1679 || a == &dev_attr_family.attr
1680 || a == &dev_attr_dsm_mask.attr)
1681 return a->mode;
1682 return 0;
1683 }
1684
1685 if (a == &dev_attr_format1.attr && num_nvdimm_formats(nvdimm) <= 1)
1686 return 0;
1687
1688 if (!test_bit(NFIT_MEM_DIRTY_COUNT, &nfit_mem->flags)
1689 && a == &dev_attr_dirty_shutdown.attr)
1690 return 0;
1691
1692 return a->mode;
1693 }
1694
1695 static const struct attribute_group acpi_nfit_dimm_attribute_group = {
1696 .name = "nfit",
1697 .attrs = acpi_nfit_dimm_attributes,
1698 .is_visible = acpi_nfit_dimm_attr_visible,
1699 };
1700
1701 static const struct attribute_group *acpi_nfit_dimm_attribute_groups[] = {
1702 &nvdimm_attribute_group,
1703 &nd_device_attribute_group,
1704 &acpi_nfit_dimm_attribute_group,
1705 NULL,
1706 };
1707
1708 static struct nvdimm *acpi_nfit_dimm_by_handle(struct acpi_nfit_desc *acpi_desc,
1709 u32 device_handle)
1710 {
1711 struct nfit_mem *nfit_mem;
1712
1713 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list)
1714 if (__to_nfit_memdev(nfit_mem)->device_handle == device_handle)
1715 return nfit_mem->nvdimm;
1716
1717 return NULL;
1718 }
1719
1720 void __acpi_nvdimm_notify(struct device *dev, u32 event)
1721 {
1722 struct nfit_mem *nfit_mem;
1723 struct acpi_nfit_desc *acpi_desc;
1724
1725 dev_dbg(dev->parent, "%s: event: %d\n", dev_name(dev),
1726 event);
1727
1728 if (event != NFIT_NOTIFY_DIMM_HEALTH) {
1729 dev_dbg(dev->parent, "%s: unknown event: %d\n", dev_name(dev),
1730 event);
1731 return;
1732 }
1733
1734 acpi_desc = dev_get_drvdata(dev->parent);
1735 if (!acpi_desc)
1736 return;
1737
1738
1739
1740
1741
1742 nfit_mem = dev_get_drvdata(dev);
1743 if (nfit_mem && nfit_mem->flags_attr)
1744 sysfs_notify_dirent(nfit_mem->flags_attr);
1745 }
1746 EXPORT_SYMBOL_GPL(__acpi_nvdimm_notify);
1747
1748 static void acpi_nvdimm_notify(acpi_handle handle, u32 event, void *data)
1749 {
1750 struct acpi_device *adev = data;
1751 struct device *dev = &adev->dev;
1752
1753 nfit_device_lock(dev->parent);
1754 __acpi_nvdimm_notify(dev, event);
1755 nfit_device_unlock(dev->parent);
1756 }
1757
1758 static bool acpi_nvdimm_has_method(struct acpi_device *adev, char *method)
1759 {
1760 acpi_handle handle;
1761 acpi_status status;
1762
1763 status = acpi_get_handle(adev->handle, method, &handle);
1764
1765 if (ACPI_SUCCESS(status))
1766 return true;
1767 return false;
1768 }
1769
1770 __weak void nfit_intel_shutdown_status(struct nfit_mem *nfit_mem)
1771 {
1772 struct device *dev = &nfit_mem->adev->dev;
1773 struct nd_intel_smart smart = { 0 };
1774 union acpi_object in_buf = {
1775 .buffer.type = ACPI_TYPE_BUFFER,
1776 .buffer.length = 0,
1777 };
1778 union acpi_object in_obj = {
1779 .package.type = ACPI_TYPE_PACKAGE,
1780 .package.count = 1,
1781 .package.elements = &in_buf,
1782 };
1783 const u8 func = ND_INTEL_SMART;
1784 const guid_t *guid = to_nfit_uuid(nfit_mem->family);
1785 u8 revid = nfit_dsm_revid(nfit_mem->family, func);
1786 struct acpi_device *adev = nfit_mem->adev;
1787 acpi_handle handle = adev->handle;
1788 union acpi_object *out_obj;
1789
1790 if ((nfit_mem->dsm_mask & (1 << func)) == 0)
1791 return;
1792
1793 out_obj = acpi_evaluate_dsm(handle, guid, revid, func, &in_obj);
1794 if (!out_obj || out_obj->type != ACPI_TYPE_BUFFER
1795 || out_obj->buffer.length < sizeof(smart)) {
1796 dev_dbg(dev->parent, "%s: failed to retrieve initial health\n",
1797 dev_name(dev));
1798 ACPI_FREE(out_obj);
1799 return;
1800 }
1801 memcpy(&smart, out_obj->buffer.pointer, sizeof(smart));
1802 ACPI_FREE(out_obj);
1803
1804 if (smart.flags & ND_INTEL_SMART_SHUTDOWN_VALID) {
1805 if (smart.shutdown_state)
1806 set_bit(NFIT_MEM_DIRTY, &nfit_mem->flags);
1807 }
1808
1809 if (smart.flags & ND_INTEL_SMART_SHUTDOWN_COUNT_VALID) {
1810 set_bit(NFIT_MEM_DIRTY_COUNT, &nfit_mem->flags);
1811 nfit_mem->dirty_shutdown = smart.shutdown_count;
1812 }
1813 }
1814
1815 static void populate_shutdown_status(struct nfit_mem *nfit_mem)
1816 {
1817
1818
1819
1820
1821
1822 if (nfit_mem->family == NVDIMM_FAMILY_INTEL)
1823 nfit_intel_shutdown_status(nfit_mem);
1824 }
1825
1826 static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
1827 struct nfit_mem *nfit_mem, u32 device_handle)
1828 {
1829 struct acpi_device *adev, *adev_dimm;
1830 struct device *dev = acpi_desc->dev;
1831 unsigned long dsm_mask, label_mask;
1832 const guid_t *guid;
1833 int i;
1834 int family = -1;
1835 struct acpi_nfit_control_region *dcr = nfit_mem->dcr;
1836
1837
1838 nfit_mem->dsm_mask = acpi_desc->dimm_cmd_force_en;
1839 nfit_mem->family = NVDIMM_FAMILY_INTEL;
1840
1841 if (dcr->valid_fields & ACPI_NFIT_CONTROL_MFG_INFO_VALID)
1842 sprintf(nfit_mem->id, "%04x-%02x-%04x-%08x",
1843 be16_to_cpu(dcr->vendor_id),
1844 dcr->manufacturing_location,
1845 be16_to_cpu(dcr->manufacturing_date),
1846 be32_to_cpu(dcr->serial_number));
1847 else
1848 sprintf(nfit_mem->id, "%04x-%08x",
1849 be16_to_cpu(dcr->vendor_id),
1850 be32_to_cpu(dcr->serial_number));
1851
1852 adev = to_acpi_dev(acpi_desc);
1853 if (!adev) {
1854
1855 populate_shutdown_status(nfit_mem);
1856 return 0;
1857 }
1858
1859 adev_dimm = acpi_find_child_device(adev, device_handle, false);
1860 nfit_mem->adev = adev_dimm;
1861 if (!adev_dimm) {
1862 dev_err(dev, "no ACPI.NFIT device with _ADR %#x, disabling...\n",
1863 device_handle);
1864 return force_enable_dimms ? 0 : -ENODEV;
1865 }
1866
1867 if (ACPI_FAILURE(acpi_install_notify_handler(adev_dimm->handle,
1868 ACPI_DEVICE_NOTIFY, acpi_nvdimm_notify, adev_dimm))) {
1869 dev_err(dev, "%s: notification registration failed\n",
1870 dev_name(&adev_dimm->dev));
1871 return -ENXIO;
1872 }
1873
1874
1875
1876
1877 dev_set_drvdata(&adev_dimm->dev, nfit_mem);
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892 for (i = 0; i <= NVDIMM_FAMILY_MAX; i++)
1893 if (acpi_check_dsm(adev_dimm->handle, to_nfit_uuid(i), 1, 1))
1894 if (family < 0 || i == default_dsm_family)
1895 family = i;
1896
1897
1898 nfit_mem->family = family;
1899 if (override_dsm_mask && !disable_vendor_specific)
1900 dsm_mask = override_dsm_mask;
1901 else if (nfit_mem->family == NVDIMM_FAMILY_INTEL) {
1902 dsm_mask = NVDIMM_INTEL_CMDMASK;
1903 if (disable_vendor_specific)
1904 dsm_mask &= ~(1 << ND_CMD_VENDOR);
1905 } else if (nfit_mem->family == NVDIMM_FAMILY_HPE1) {
1906 dsm_mask = 0x1c3c76;
1907 } else if (nfit_mem->family == NVDIMM_FAMILY_HPE2) {
1908 dsm_mask = 0x1fe;
1909 if (disable_vendor_specific)
1910 dsm_mask &= ~(1 << 8);
1911 } else if (nfit_mem->family == NVDIMM_FAMILY_MSFT) {
1912 dsm_mask = 0xffffffff;
1913 } else if (nfit_mem->family == NVDIMM_FAMILY_HYPERV) {
1914 dsm_mask = 0x1f;
1915 } else {
1916 dev_dbg(dev, "unknown dimm command family\n");
1917 nfit_mem->family = -1;
1918
1919 return 0;
1920 }
1921
1922
1923
1924
1925
1926
1927 dsm_mask &= ~1UL;
1928
1929 guid = to_nfit_uuid(nfit_mem->family);
1930 for_each_set_bit(i, &dsm_mask, BITS_PER_LONG)
1931 if (acpi_check_dsm(adev_dimm->handle, guid,
1932 nfit_dsm_revid(nfit_mem->family, i),
1933 1ULL << i))
1934 set_bit(i, &nfit_mem->dsm_mask);
1935
1936
1937
1938
1939
1940 label_mask = 1 << ND_CMD_GET_CONFIG_SIZE | 1 << ND_CMD_GET_CONFIG_DATA
1941 | 1 << ND_CMD_SET_CONFIG_DATA;
1942 if (family == NVDIMM_FAMILY_INTEL
1943 && (dsm_mask & label_mask) == label_mask)
1944 ;
1945 else {
1946 if (acpi_nvdimm_has_method(adev_dimm, "_LSI")
1947 && acpi_nvdimm_has_method(adev_dimm, "_LSR")) {
1948 dev_dbg(dev, "%s: has _LSR\n", dev_name(&adev_dimm->dev));
1949 set_bit(NFIT_MEM_LSR, &nfit_mem->flags);
1950 }
1951
1952 if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)
1953 && acpi_nvdimm_has_method(adev_dimm, "_LSW")) {
1954 dev_dbg(dev, "%s: has _LSW\n", dev_name(&adev_dimm->dev));
1955 set_bit(NFIT_MEM_LSW, &nfit_mem->flags);
1956 }
1957
1958
1959
1960
1961
1962 if (!test_bit(NFIT_MEM_LSW, &nfit_mem->flags)
1963 && !force_labels) {
1964 dev_dbg(dev, "%s: No _LSW, disable labels\n",
1965 dev_name(&adev_dimm->dev));
1966 clear_bit(NFIT_MEM_LSR, &nfit_mem->flags);
1967 } else
1968 dev_dbg(dev, "%s: Force enable labels\n",
1969 dev_name(&adev_dimm->dev));
1970 }
1971
1972 populate_shutdown_status(nfit_mem);
1973
1974 return 0;
1975 }
1976
1977 static void shutdown_dimm_notify(void *data)
1978 {
1979 struct acpi_nfit_desc *acpi_desc = data;
1980 struct nfit_mem *nfit_mem;
1981
1982 mutex_lock(&acpi_desc->init_mutex);
1983
1984
1985
1986
1987 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
1988 struct acpi_device *adev_dimm = nfit_mem->adev;
1989
1990 if (nfit_mem->flags_attr) {
1991 sysfs_put(nfit_mem->flags_attr);
1992 nfit_mem->flags_attr = NULL;
1993 }
1994 if (adev_dimm) {
1995 acpi_remove_notify_handler(adev_dimm->handle,
1996 ACPI_DEVICE_NOTIFY, acpi_nvdimm_notify);
1997 dev_set_drvdata(&adev_dimm->dev, NULL);
1998 }
1999 }
2000 mutex_unlock(&acpi_desc->init_mutex);
2001 }
2002
2003 static const struct nvdimm_security_ops *acpi_nfit_get_security_ops(int family)
2004 {
2005 switch (family) {
2006 case NVDIMM_FAMILY_INTEL:
2007 return intel_security_ops;
2008 default:
2009 return NULL;
2010 }
2011 }
2012
2013 static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
2014 {
2015 struct nfit_mem *nfit_mem;
2016 int dimm_count = 0, rc;
2017 struct nvdimm *nvdimm;
2018
2019 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
2020 struct acpi_nfit_flush_address *flush;
2021 unsigned long flags = 0, cmd_mask;
2022 struct nfit_memdev *nfit_memdev;
2023 u32 device_handle;
2024 u16 mem_flags;
2025
2026 device_handle = __to_nfit_memdev(nfit_mem)->device_handle;
2027 nvdimm = acpi_nfit_dimm_by_handle(acpi_desc, device_handle);
2028 if (nvdimm) {
2029 dimm_count++;
2030 continue;
2031 }
2032
2033 if (nfit_mem->bdw && nfit_mem->memdev_pmem)
2034 set_bit(NDD_ALIASING, &flags);
2035
2036
2037 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
2038 struct acpi_nfit_memory_map *dimm_memdev;
2039
2040 dimm_memdev = __to_nfit_memdev(nfit_mem);
2041 if (dimm_memdev->device_handle
2042 != nfit_memdev->memdev->device_handle)
2043 continue;
2044 dimm_memdev->flags |= nfit_memdev->memdev->flags;
2045 }
2046
2047 mem_flags = __to_nfit_memdev(nfit_mem)->flags;
2048 if (mem_flags & ACPI_NFIT_MEM_NOT_ARMED)
2049 set_bit(NDD_UNARMED, &flags);
2050
2051 rc = acpi_nfit_add_dimm(acpi_desc, nfit_mem, device_handle);
2052 if (rc)
2053 continue;
2054
2055
2056
2057
2058
2059
2060 cmd_mask = 1UL << ND_CMD_CALL;
2061 if (nfit_mem->family == NVDIMM_FAMILY_INTEL) {
2062
2063
2064
2065
2066
2067 cmd_mask |= nfit_mem->dsm_mask & NVDIMM_STANDARD_CMDMASK;
2068 }
2069
2070
2071 if (nfit_mem->family == NVDIMM_FAMILY_HYPERV)
2072 set_bit(NDD_NOBLK, &flags);
2073
2074 if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)) {
2075 set_bit(ND_CMD_GET_CONFIG_SIZE, &cmd_mask);
2076 set_bit(ND_CMD_GET_CONFIG_DATA, &cmd_mask);
2077 }
2078 if (test_bit(NFIT_MEM_LSW, &nfit_mem->flags))
2079 set_bit(ND_CMD_SET_CONFIG_DATA, &cmd_mask);
2080
2081 flush = nfit_mem->nfit_flush ? nfit_mem->nfit_flush->flush
2082 : NULL;
2083 nvdimm = __nvdimm_create(acpi_desc->nvdimm_bus, nfit_mem,
2084 acpi_nfit_dimm_attribute_groups,
2085 flags, cmd_mask, flush ? flush->hint_count : 0,
2086 nfit_mem->flush_wpq, &nfit_mem->id[0],
2087 acpi_nfit_get_security_ops(nfit_mem->family));
2088 if (!nvdimm)
2089 return -ENOMEM;
2090
2091 nfit_mem->nvdimm = nvdimm;
2092 dimm_count++;
2093
2094 if ((mem_flags & ACPI_NFIT_MEM_FAILED_MASK) == 0)
2095 continue;
2096
2097 dev_err(acpi_desc->dev, "Error found in NVDIMM %s flags:%s%s%s%s%s\n",
2098 nvdimm_name(nvdimm),
2099 mem_flags & ACPI_NFIT_MEM_SAVE_FAILED ? " save_fail" : "",
2100 mem_flags & ACPI_NFIT_MEM_RESTORE_FAILED ? " restore_fail":"",
2101 mem_flags & ACPI_NFIT_MEM_FLUSH_FAILED ? " flush_fail" : "",
2102 mem_flags & ACPI_NFIT_MEM_NOT_ARMED ? " not_armed" : "",
2103 mem_flags & ACPI_NFIT_MEM_MAP_FAILED ? " map_fail" : "");
2104
2105 }
2106
2107 rc = nvdimm_bus_check_dimm_count(acpi_desc->nvdimm_bus, dimm_count);
2108 if (rc)
2109 return rc;
2110
2111
2112
2113
2114
2115 list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) {
2116 struct kernfs_node *nfit_kernfs;
2117
2118 nvdimm = nfit_mem->nvdimm;
2119 if (!nvdimm)
2120 continue;
2121
2122 nfit_kernfs = sysfs_get_dirent(nvdimm_kobj(nvdimm)->sd, "nfit");
2123 if (nfit_kernfs)
2124 nfit_mem->flags_attr = sysfs_get_dirent(nfit_kernfs,
2125 "flags");
2126 sysfs_put(nfit_kernfs);
2127 if (!nfit_mem->flags_attr)
2128 dev_warn(acpi_desc->dev, "%s: notifications disabled\n",
2129 nvdimm_name(nvdimm));
2130 }
2131
2132 return devm_add_action_or_reset(acpi_desc->dev, shutdown_dimm_notify,
2133 acpi_desc);
2134 }
2135
2136
2137
2138
2139
2140 enum nfit_aux_cmds {
2141 NFIT_CMD_TRANSLATE_SPA = 5,
2142 NFIT_CMD_ARS_INJECT_SET = 7,
2143 NFIT_CMD_ARS_INJECT_CLEAR = 8,
2144 NFIT_CMD_ARS_INJECT_GET = 9,
2145 };
2146
2147 static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc)
2148 {
2149 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2150 const guid_t *guid = to_nfit_uuid(NFIT_DEV_BUS);
2151 struct acpi_device *adev;
2152 unsigned long dsm_mask;
2153 int i;
2154
2155 nd_desc->cmd_mask = acpi_desc->bus_cmd_force_en;
2156 nd_desc->bus_dsm_mask = acpi_desc->bus_nfit_cmd_force_en;
2157 adev = to_acpi_dev(acpi_desc);
2158 if (!adev)
2159 return;
2160
2161 for (i = ND_CMD_ARS_CAP; i <= ND_CMD_CLEAR_ERROR; i++)
2162 if (acpi_check_dsm(adev->handle, guid, 1, 1ULL << i))
2163 set_bit(i, &nd_desc->cmd_mask);
2164 set_bit(ND_CMD_CALL, &nd_desc->cmd_mask);
2165
2166 dsm_mask =
2167 (1 << ND_CMD_ARS_CAP) |
2168 (1 << ND_CMD_ARS_START) |
2169 (1 << ND_CMD_ARS_STATUS) |
2170 (1 << ND_CMD_CLEAR_ERROR) |
2171 (1 << NFIT_CMD_TRANSLATE_SPA) |
2172 (1 << NFIT_CMD_ARS_INJECT_SET) |
2173 (1 << NFIT_CMD_ARS_INJECT_CLEAR) |
2174 (1 << NFIT_CMD_ARS_INJECT_GET);
2175 for_each_set_bit(i, &dsm_mask, BITS_PER_LONG)
2176 if (acpi_check_dsm(adev->handle, guid, 1, 1ULL << i))
2177 set_bit(i, &nd_desc->bus_dsm_mask);
2178 }
2179
2180 static ssize_t range_index_show(struct device *dev,
2181 struct device_attribute *attr, char *buf)
2182 {
2183 struct nd_region *nd_region = to_nd_region(dev);
2184 struct nfit_spa *nfit_spa = nd_region_provider_data(nd_region);
2185
2186 return sprintf(buf, "%d\n", nfit_spa->spa->range_index);
2187 }
2188 static DEVICE_ATTR_RO(range_index);
2189
2190 static struct attribute *acpi_nfit_region_attributes[] = {
2191 &dev_attr_range_index.attr,
2192 NULL,
2193 };
2194
2195 static const struct attribute_group acpi_nfit_region_attribute_group = {
2196 .name = "nfit",
2197 .attrs = acpi_nfit_region_attributes,
2198 };
2199
2200 static const struct attribute_group *acpi_nfit_region_attribute_groups[] = {
2201 &nd_region_attribute_group,
2202 &nd_mapping_attribute_group,
2203 &nd_device_attribute_group,
2204 &nd_numa_attribute_group,
2205 &acpi_nfit_region_attribute_group,
2206 NULL,
2207 };
2208
2209
2210 struct nfit_set_info {
2211 struct nfit_set_info_map {
2212 u64 region_offset;
2213 u32 serial_number;
2214 u32 pad;
2215 } mapping[0];
2216 };
2217
2218 struct nfit_set_info2 {
2219 struct nfit_set_info_map2 {
2220 u64 region_offset;
2221 u32 serial_number;
2222 u16 vendor_id;
2223 u16 manufacturing_date;
2224 u8 manufacturing_location;
2225 u8 reserved[31];
2226 } mapping[0];
2227 };
2228
2229 static size_t sizeof_nfit_set_info(int num_mappings)
2230 {
2231 return sizeof(struct nfit_set_info)
2232 + num_mappings * sizeof(struct nfit_set_info_map);
2233 }
2234
2235 static size_t sizeof_nfit_set_info2(int num_mappings)
2236 {
2237 return sizeof(struct nfit_set_info2)
2238 + num_mappings * sizeof(struct nfit_set_info_map2);
2239 }
2240
2241 static int cmp_map_compat(const void *m0, const void *m1)
2242 {
2243 const struct nfit_set_info_map *map0 = m0;
2244 const struct nfit_set_info_map *map1 = m1;
2245
2246 return memcmp(&map0->region_offset, &map1->region_offset,
2247 sizeof(u64));
2248 }
2249
2250 static int cmp_map(const void *m0, const void *m1)
2251 {
2252 const struct nfit_set_info_map *map0 = m0;
2253 const struct nfit_set_info_map *map1 = m1;
2254
2255 if (map0->region_offset < map1->region_offset)
2256 return -1;
2257 else if (map0->region_offset > map1->region_offset)
2258 return 1;
2259 return 0;
2260 }
2261
2262 static int cmp_map2(const void *m0, const void *m1)
2263 {
2264 const struct nfit_set_info_map2 *map0 = m0;
2265 const struct nfit_set_info_map2 *map1 = m1;
2266
2267 if (map0->region_offset < map1->region_offset)
2268 return -1;
2269 else if (map0->region_offset > map1->region_offset)
2270 return 1;
2271 return 0;
2272 }
2273
2274
2275 static struct acpi_nfit_memory_map *memdev_from_spa(
2276 struct acpi_nfit_desc *acpi_desc, u16 range_index, int n)
2277 {
2278 struct nfit_memdev *nfit_memdev;
2279
2280 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list)
2281 if (nfit_memdev->memdev->range_index == range_index)
2282 if (n-- == 0)
2283 return nfit_memdev->memdev;
2284 return NULL;
2285 }
2286
2287 static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc *acpi_desc,
2288 struct nd_region_desc *ndr_desc,
2289 struct acpi_nfit_system_address *spa)
2290 {
2291 struct device *dev = acpi_desc->dev;
2292 struct nd_interleave_set *nd_set;
2293 u16 nr = ndr_desc->num_mappings;
2294 struct nfit_set_info2 *info2;
2295 struct nfit_set_info *info;
2296 int i;
2297
2298 nd_set = devm_kzalloc(dev, sizeof(*nd_set), GFP_KERNEL);
2299 if (!nd_set)
2300 return -ENOMEM;
2301 guid_copy(&nd_set->type_guid, (guid_t *) spa->range_guid);
2302
2303 info = devm_kzalloc(dev, sizeof_nfit_set_info(nr), GFP_KERNEL);
2304 if (!info)
2305 return -ENOMEM;
2306
2307 info2 = devm_kzalloc(dev, sizeof_nfit_set_info2(nr), GFP_KERNEL);
2308 if (!info2)
2309 return -ENOMEM;
2310
2311 for (i = 0; i < nr; i++) {
2312 struct nd_mapping_desc *mapping = &ndr_desc->mapping[i];
2313 struct nfit_set_info_map *map = &info->mapping[i];
2314 struct nfit_set_info_map2 *map2 = &info2->mapping[i];
2315 struct nvdimm *nvdimm = mapping->nvdimm;
2316 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
2317 struct acpi_nfit_memory_map *memdev = memdev_from_spa(acpi_desc,
2318 spa->range_index, i);
2319 struct acpi_nfit_control_region *dcr = nfit_mem->dcr;
2320
2321 if (!memdev || !nfit_mem->dcr) {
2322 dev_err(dev, "%s: failed to find DCR\n", __func__);
2323 return -ENODEV;
2324 }
2325
2326 map->region_offset = memdev->region_offset;
2327 map->serial_number = dcr->serial_number;
2328
2329 map2->region_offset = memdev->region_offset;
2330 map2->serial_number = dcr->serial_number;
2331 map2->vendor_id = dcr->vendor_id;
2332 map2->manufacturing_date = dcr->manufacturing_date;
2333 map2->manufacturing_location = dcr->manufacturing_location;
2334 }
2335
2336
2337 sort(&info->mapping[0], nr, sizeof(struct nfit_set_info_map),
2338 cmp_map, NULL);
2339 nd_set->cookie1 = nd_fletcher64(info, sizeof_nfit_set_info(nr), 0);
2340
2341
2342 sort(&info2->mapping[0], nr, sizeof(struct nfit_set_info_map2),
2343 cmp_map2, NULL);
2344 nd_set->cookie2 = nd_fletcher64(info2, sizeof_nfit_set_info2(nr), 0);
2345
2346
2347 sort(&info->mapping[0], nr, sizeof(struct nfit_set_info_map),
2348 cmp_map_compat, NULL);
2349 nd_set->altcookie = nd_fletcher64(info, sizeof_nfit_set_info(nr), 0);
2350
2351
2352 for (i = 0; i < nr; i++) {
2353 struct nfit_set_info_map2 *map2 = &info2->mapping[i];
2354 int j;
2355
2356 for (j = 0; j < nr; j++) {
2357 struct nd_mapping_desc *mapping = &ndr_desc->mapping[j];
2358 struct nvdimm *nvdimm = mapping->nvdimm;
2359 struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
2360 struct acpi_nfit_control_region *dcr = nfit_mem->dcr;
2361
2362 if (map2->serial_number == dcr->serial_number &&
2363 map2->vendor_id == dcr->vendor_id &&
2364 map2->manufacturing_date == dcr->manufacturing_date &&
2365 map2->manufacturing_location
2366 == dcr->manufacturing_location) {
2367 mapping->position = i;
2368 break;
2369 }
2370 }
2371 }
2372
2373 ndr_desc->nd_set = nd_set;
2374 devm_kfree(dev, info);
2375 devm_kfree(dev, info2);
2376
2377 return 0;
2378 }
2379
2380 static u64 to_interleave_offset(u64 offset, struct nfit_blk_mmio *mmio)
2381 {
2382 struct acpi_nfit_interleave *idt = mmio->idt;
2383 u32 sub_line_offset, line_index, line_offset;
2384 u64 line_no, table_skip_count, table_offset;
2385
2386 line_no = div_u64_rem(offset, mmio->line_size, &sub_line_offset);
2387 table_skip_count = div_u64_rem(line_no, mmio->num_lines, &line_index);
2388 line_offset = idt->line_offset[line_index]
2389 * mmio->line_size;
2390 table_offset = table_skip_count * mmio->table_size;
2391
2392 return mmio->base_offset + line_offset + table_offset + sub_line_offset;
2393 }
2394
2395 static u32 read_blk_stat(struct nfit_blk *nfit_blk, unsigned int bw)
2396 {
2397 struct nfit_blk_mmio *mmio = &nfit_blk->mmio[DCR];
2398 u64 offset = nfit_blk->stat_offset + mmio->size * bw;
2399 const u32 STATUS_MASK = 0x80000037;
2400
2401 if (mmio->num_lines)
2402 offset = to_interleave_offset(offset, mmio);
2403
2404 return readl(mmio->addr.base + offset) & STATUS_MASK;
2405 }
2406
2407 static void write_blk_ctl(struct nfit_blk *nfit_blk, unsigned int bw,
2408 resource_size_t dpa, unsigned int len, unsigned int write)
2409 {
2410 u64 cmd, offset;
2411 struct nfit_blk_mmio *mmio = &nfit_blk->mmio[DCR];
2412
2413 enum {
2414 BCW_OFFSET_MASK = (1ULL << 48)-1,
2415 BCW_LEN_SHIFT = 48,
2416 BCW_LEN_MASK = (1ULL << 8) - 1,
2417 BCW_CMD_SHIFT = 56,
2418 };
2419
2420 cmd = (dpa >> L1_CACHE_SHIFT) & BCW_OFFSET_MASK;
2421 len = len >> L1_CACHE_SHIFT;
2422 cmd |= ((u64) len & BCW_LEN_MASK) << BCW_LEN_SHIFT;
2423 cmd |= ((u64) write) << BCW_CMD_SHIFT;
2424
2425 offset = nfit_blk->cmd_offset + mmio->size * bw;
2426 if (mmio->num_lines)
2427 offset = to_interleave_offset(offset, mmio);
2428
2429 writeq(cmd, mmio->addr.base + offset);
2430 nvdimm_flush(nfit_blk->nd_region, NULL);
2431
2432 if (nfit_blk->dimm_flags & NFIT_BLK_DCR_LATCH)
2433 readq(mmio->addr.base + offset);
2434 }
2435
2436 static int acpi_nfit_blk_single_io(struct nfit_blk *nfit_blk,
2437 resource_size_t dpa, void *iobuf, size_t len, int rw,
2438 unsigned int lane)
2439 {
2440 struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
2441 unsigned int copied = 0;
2442 u64 base_offset;
2443 int rc;
2444
2445 base_offset = nfit_blk->bdw_offset + dpa % L1_CACHE_BYTES
2446 + lane * mmio->size;
2447 write_blk_ctl(nfit_blk, lane, dpa, len, rw);
2448 while (len) {
2449 unsigned int c;
2450 u64 offset;
2451
2452 if (mmio->num_lines) {
2453 u32 line_offset;
2454
2455 offset = to_interleave_offset(base_offset + copied,
2456 mmio);
2457 div_u64_rem(offset, mmio->line_size, &line_offset);
2458 c = min_t(size_t, len, mmio->line_size - line_offset);
2459 } else {
2460 offset = base_offset + nfit_blk->bdw_offset;
2461 c = len;
2462 }
2463
2464 if (rw)
2465 memcpy_flushcache(mmio->addr.aperture + offset, iobuf + copied, c);
2466 else {
2467 if (nfit_blk->dimm_flags & NFIT_BLK_READ_FLUSH)
2468 arch_invalidate_pmem((void __force *)
2469 mmio->addr.aperture + offset, c);
2470
2471 memcpy(iobuf + copied, mmio->addr.aperture + offset, c);
2472 }
2473
2474 copied += c;
2475 len -= c;
2476 }
2477
2478 if (rw)
2479 nvdimm_flush(nfit_blk->nd_region, NULL);
2480
2481 rc = read_blk_stat(nfit_blk, lane) ? -EIO : 0;
2482 return rc;
2483 }
2484
2485 static int acpi_nfit_blk_region_do_io(struct nd_blk_region *ndbr,
2486 resource_size_t dpa, void *iobuf, u64 len, int rw)
2487 {
2488 struct nfit_blk *nfit_blk = nd_blk_region_provider_data(ndbr);
2489 struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW];
2490 struct nd_region *nd_region = nfit_blk->nd_region;
2491 unsigned int lane, copied = 0;
2492 int rc = 0;
2493
2494 lane = nd_region_acquire_lane(nd_region);
2495 while (len) {
2496 u64 c = min(len, mmio->size);
2497
2498 rc = acpi_nfit_blk_single_io(nfit_blk, dpa + copied,
2499 iobuf + copied, c, rw, lane);
2500 if (rc)
2501 break;
2502
2503 copied += c;
2504 len -= c;
2505 }
2506 nd_region_release_lane(nd_region, lane);
2507
2508 return rc;
2509 }
2510
2511 static int nfit_blk_init_interleave(struct nfit_blk_mmio *mmio,
2512 struct acpi_nfit_interleave *idt, u16 interleave_ways)
2513 {
2514 if (idt) {
2515 mmio->num_lines = idt->line_count;
2516 mmio->line_size = idt->line_size;
2517 if (interleave_ways == 0)
2518 return -ENXIO;
2519 mmio->table_size = mmio->num_lines * interleave_ways
2520 * mmio->line_size;
2521 }
2522
2523 return 0;
2524 }
2525
2526 static int acpi_nfit_blk_get_flags(struct nvdimm_bus_descriptor *nd_desc,
2527 struct nvdimm *nvdimm, struct nfit_blk *nfit_blk)
2528 {
2529 struct nd_cmd_dimm_flags flags;
2530 int rc;
2531
2532 memset(&flags, 0, sizeof(flags));
2533 rc = nd_desc->ndctl(nd_desc, nvdimm, ND_CMD_DIMM_FLAGS, &flags,
2534 sizeof(flags), NULL);
2535
2536 if (rc >= 0 && flags.status == 0)
2537 nfit_blk->dimm_flags = flags.flags;
2538 else if (rc == -ENOTTY) {
2539
2540 nfit_blk->dimm_flags = NFIT_BLK_DCR_LATCH | NFIT_BLK_READ_FLUSH;
2541 rc = 0;
2542 } else
2543 rc = -ENXIO;
2544
2545 return rc;
2546 }
2547
2548 static int acpi_nfit_blk_region_enable(struct nvdimm_bus *nvdimm_bus,
2549 struct device *dev)
2550 {
2551 struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
2552 struct nd_blk_region *ndbr = to_nd_blk_region(dev);
2553 struct nfit_blk_mmio *mmio;
2554 struct nfit_blk *nfit_blk;
2555 struct nfit_mem *nfit_mem;
2556 struct nvdimm *nvdimm;
2557 int rc;
2558
2559 nvdimm = nd_blk_region_to_dimm(ndbr);
2560 nfit_mem = nvdimm_provider_data(nvdimm);
2561 if (!nfit_mem || !nfit_mem->dcr || !nfit_mem->bdw) {
2562 dev_dbg(dev, "missing%s%s%s\n",
2563 nfit_mem ? "" : " nfit_mem",
2564 (nfit_mem && nfit_mem->dcr) ? "" : " dcr",
2565 (nfit_mem && nfit_mem->bdw) ? "" : " bdw");
2566 return -ENXIO;
2567 }
2568
2569 nfit_blk = devm_kzalloc(dev, sizeof(*nfit_blk), GFP_KERNEL);
2570 if (!nfit_blk)
2571 return -ENOMEM;
2572 nd_blk_region_set_provider_data(ndbr, nfit_blk);
2573 nfit_blk->nd_region = to_nd_region(dev);
2574
2575
2576 nfit_blk->bdw_offset = nfit_mem->bdw->offset;
2577 mmio = &nfit_blk->mmio[BDW];
2578 mmio->addr.base = devm_nvdimm_memremap(dev, nfit_mem->spa_bdw->address,
2579 nfit_mem->spa_bdw->length, nd_blk_memremap_flags(ndbr));
2580 if (!mmio->addr.base) {
2581 dev_dbg(dev, "%s failed to map bdw\n",
2582 nvdimm_name(nvdimm));
2583 return -ENOMEM;
2584 }
2585 mmio->size = nfit_mem->bdw->size;
2586 mmio->base_offset = nfit_mem->memdev_bdw->region_offset;
2587 mmio->idt = nfit_mem->idt_bdw;
2588 mmio->spa = nfit_mem->spa_bdw;
2589 rc = nfit_blk_init_interleave(mmio, nfit_mem->idt_bdw,
2590 nfit_mem->memdev_bdw->interleave_ways);
2591 if (rc) {
2592 dev_dbg(dev, "%s failed to init bdw interleave\n",
2593 nvdimm_name(nvdimm));
2594 return rc;
2595 }
2596
2597
2598 nfit_blk->cmd_offset = nfit_mem->dcr->command_offset;
2599 nfit_blk->stat_offset = nfit_mem->dcr->status_offset;
2600 mmio = &nfit_blk->mmio[DCR];
2601 mmio->addr.base = devm_nvdimm_ioremap(dev, nfit_mem->spa_dcr->address,
2602 nfit_mem->spa_dcr->length);
2603 if (!mmio->addr.base) {
2604 dev_dbg(dev, "%s failed to map dcr\n",
2605 nvdimm_name(nvdimm));
2606 return -ENOMEM;
2607 }
2608 mmio->size = nfit_mem->dcr->window_size;
2609 mmio->base_offset = nfit_mem->memdev_dcr->region_offset;
2610 mmio->idt = nfit_mem->idt_dcr;
2611 mmio->spa = nfit_mem->spa_dcr;
2612 rc = nfit_blk_init_interleave(mmio, nfit_mem->idt_dcr,
2613 nfit_mem->memdev_dcr->interleave_ways);
2614 if (rc) {
2615 dev_dbg(dev, "%s failed to init dcr interleave\n",
2616 nvdimm_name(nvdimm));
2617 return rc;
2618 }
2619
2620 rc = acpi_nfit_blk_get_flags(nd_desc, nvdimm, nfit_blk);
2621 if (rc < 0) {
2622 dev_dbg(dev, "%s failed get DIMM flags\n",
2623 nvdimm_name(nvdimm));
2624 return rc;
2625 }
2626
2627 if (nvdimm_has_flush(nfit_blk->nd_region) < 0)
2628 dev_warn(dev, "unable to guarantee persistence of writes\n");
2629
2630 if (mmio->line_size == 0)
2631 return 0;
2632
2633 if ((u32) nfit_blk->cmd_offset % mmio->line_size
2634 + 8 > mmio->line_size) {
2635 dev_dbg(dev, "cmd_offset crosses interleave boundary\n");
2636 return -ENXIO;
2637 } else if ((u32) nfit_blk->stat_offset % mmio->line_size
2638 + 8 > mmio->line_size) {
2639 dev_dbg(dev, "stat_offset crosses interleave boundary\n");
2640 return -ENXIO;
2641 }
2642
2643 return 0;
2644 }
2645
2646 static int ars_get_cap(struct acpi_nfit_desc *acpi_desc,
2647 struct nd_cmd_ars_cap *cmd, struct nfit_spa *nfit_spa)
2648 {
2649 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2650 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2651 int cmd_rc, rc;
2652
2653 cmd->address = spa->address;
2654 cmd->length = spa->length;
2655 rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_CAP, cmd,
2656 sizeof(*cmd), &cmd_rc);
2657 if (rc < 0)
2658 return rc;
2659 return cmd_rc;
2660 }
2661
2662 static int ars_start(struct acpi_nfit_desc *acpi_desc,
2663 struct nfit_spa *nfit_spa, enum nfit_ars_state req_type)
2664 {
2665 int rc;
2666 int cmd_rc;
2667 struct nd_cmd_ars_start ars_start;
2668 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2669 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2670
2671 memset(&ars_start, 0, sizeof(ars_start));
2672 ars_start.address = spa->address;
2673 ars_start.length = spa->length;
2674 if (req_type == ARS_REQ_SHORT)
2675 ars_start.flags = ND_ARS_RETURN_PREV_DATA;
2676 if (nfit_spa_type(spa) == NFIT_SPA_PM)
2677 ars_start.type = ND_ARS_PERSISTENT;
2678 else if (nfit_spa_type(spa) == NFIT_SPA_VOLATILE)
2679 ars_start.type = ND_ARS_VOLATILE;
2680 else
2681 return -ENOTTY;
2682
2683 rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_START, &ars_start,
2684 sizeof(ars_start), &cmd_rc);
2685
2686 if (rc < 0)
2687 return rc;
2688 if (cmd_rc < 0)
2689 return cmd_rc;
2690 set_bit(ARS_VALID, &acpi_desc->scrub_flags);
2691 return 0;
2692 }
2693
2694 static int ars_continue(struct acpi_nfit_desc *acpi_desc)
2695 {
2696 int rc, cmd_rc;
2697 struct nd_cmd_ars_start ars_start;
2698 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2699 struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
2700
2701 ars_start = (struct nd_cmd_ars_start) {
2702 .address = ars_status->restart_address,
2703 .length = ars_status->restart_length,
2704 .type = ars_status->type,
2705 };
2706 rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_START, &ars_start,
2707 sizeof(ars_start), &cmd_rc);
2708 if (rc < 0)
2709 return rc;
2710 return cmd_rc;
2711 }
2712
2713 static int ars_get_status(struct acpi_nfit_desc *acpi_desc)
2714 {
2715 struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
2716 struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
2717 int rc, cmd_rc;
2718
2719 rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_STATUS, ars_status,
2720 acpi_desc->max_ars, &cmd_rc);
2721 if (rc < 0)
2722 return rc;
2723 return cmd_rc;
2724 }
2725
2726 static void ars_complete(struct acpi_nfit_desc *acpi_desc,
2727 struct nfit_spa *nfit_spa)
2728 {
2729 struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
2730 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2731 struct nd_region *nd_region = nfit_spa->nd_region;
2732 struct device *dev;
2733
2734 lockdep_assert_held(&acpi_desc->init_mutex);
2735
2736
2737
2738
2739
2740 if (acpi_desc->scrub_spa != nfit_spa)
2741 return;
2742
2743 if ((ars_status->address >= spa->address && ars_status->address
2744 < spa->address + spa->length)
2745 || (ars_status->address < spa->address)) {
2746
2747
2748
2749
2750
2751
2752
2753
2754 if (ars_status->address + ars_status->length
2755 >= spa->address + spa->length)
2756 ;
2757 else
2758 return;
2759 } else
2760 return;
2761
2762 acpi_desc->scrub_spa = NULL;
2763 if (nd_region) {
2764 dev = nd_region_dev(nd_region);
2765 nvdimm_region_notify(nd_region, NVDIMM_REVALIDATE_POISON);
2766 } else
2767 dev = acpi_desc->dev;
2768 dev_dbg(dev, "ARS: range %d complete\n", spa->range_index);
2769 }
2770
2771 static int ars_status_process_records(struct acpi_nfit_desc *acpi_desc)
2772 {
2773 struct nvdimm_bus *nvdimm_bus = acpi_desc->nvdimm_bus;
2774 struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
2775 int rc;
2776 u32 i;
2777
2778
2779
2780
2781
2782 if (ars_status->out_length < 44)
2783 return 0;
2784
2785
2786
2787
2788
2789 if (!test_and_clear_bit(ARS_VALID, &acpi_desc->scrub_flags)) {
2790 dev_dbg(acpi_desc->dev, "skip %d stale records\n",
2791 ars_status->num_records);
2792 return 0;
2793 }
2794
2795 for (i = 0; i < ars_status->num_records; i++) {
2796
2797 if (ars_status->out_length
2798 < 44 + sizeof(struct nd_ars_record) * (i + 1))
2799 break;
2800 rc = nvdimm_bus_add_badrange(nvdimm_bus,
2801 ars_status->records[i].err_address,
2802 ars_status->records[i].length);
2803 if (rc)
2804 return rc;
2805 }
2806 if (i < ars_status->num_records)
2807 dev_warn(acpi_desc->dev, "detected truncated ars results\n");
2808
2809 return 0;
2810 }
2811
2812 static void acpi_nfit_remove_resource(void *data)
2813 {
2814 struct resource *res = data;
2815
2816 remove_resource(res);
2817 }
2818
2819 static int acpi_nfit_insert_resource(struct acpi_nfit_desc *acpi_desc,
2820 struct nd_region_desc *ndr_desc)
2821 {
2822 struct resource *res, *nd_res = ndr_desc->res;
2823 int is_pmem, ret;
2824
2825
2826 is_pmem = region_intersects(nd_res->start, resource_size(nd_res),
2827 IORESOURCE_MEM, IORES_DESC_PERSISTENT_MEMORY);
2828 if (is_pmem == REGION_INTERSECTS)
2829 return 0;
2830
2831 res = devm_kzalloc(acpi_desc->dev, sizeof(*res), GFP_KERNEL);
2832 if (!res)
2833 return -ENOMEM;
2834
2835 res->name = "Persistent Memory";
2836 res->start = nd_res->start;
2837 res->end = nd_res->end;
2838 res->flags = IORESOURCE_MEM;
2839 res->desc = IORES_DESC_PERSISTENT_MEMORY;
2840
2841 ret = insert_resource(&iomem_resource, res);
2842 if (ret)
2843 return ret;
2844
2845 ret = devm_add_action_or_reset(acpi_desc->dev,
2846 acpi_nfit_remove_resource,
2847 res);
2848 if (ret)
2849 return ret;
2850
2851 return 0;
2852 }
2853
2854 static int acpi_nfit_init_mapping(struct acpi_nfit_desc *acpi_desc,
2855 struct nd_mapping_desc *mapping, struct nd_region_desc *ndr_desc,
2856 struct acpi_nfit_memory_map *memdev,
2857 struct nfit_spa *nfit_spa)
2858 {
2859 struct nvdimm *nvdimm = acpi_nfit_dimm_by_handle(acpi_desc,
2860 memdev->device_handle);
2861 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2862 struct nd_blk_region_desc *ndbr_desc;
2863 struct nfit_mem *nfit_mem;
2864 int rc;
2865
2866 if (!nvdimm) {
2867 dev_err(acpi_desc->dev, "spa%d dimm: %#x not found\n",
2868 spa->range_index, memdev->device_handle);
2869 return -ENODEV;
2870 }
2871
2872 mapping->nvdimm = nvdimm;
2873 switch (nfit_spa_type(spa)) {
2874 case NFIT_SPA_PM:
2875 case NFIT_SPA_VOLATILE:
2876 mapping->start = memdev->address;
2877 mapping->size = memdev->region_size;
2878 break;
2879 case NFIT_SPA_DCR:
2880 nfit_mem = nvdimm_provider_data(nvdimm);
2881 if (!nfit_mem || !nfit_mem->bdw) {
2882 dev_dbg(acpi_desc->dev, "spa%d %s missing bdw\n",
2883 spa->range_index, nvdimm_name(nvdimm));
2884 break;
2885 }
2886
2887 mapping->size = nfit_mem->bdw->capacity;
2888 mapping->start = nfit_mem->bdw->start_address;
2889 ndr_desc->num_lanes = nfit_mem->bdw->windows;
2890 ndr_desc->mapping = mapping;
2891 ndr_desc->num_mappings = 1;
2892 ndbr_desc = to_blk_region_desc(ndr_desc);
2893 ndbr_desc->enable = acpi_nfit_blk_region_enable;
2894 ndbr_desc->do_io = acpi_desc->blk_do_io;
2895 rc = acpi_nfit_init_interleave_set(acpi_desc, ndr_desc, spa);
2896 if (rc)
2897 return rc;
2898 nfit_spa->nd_region = nvdimm_blk_region_create(acpi_desc->nvdimm_bus,
2899 ndr_desc);
2900 if (!nfit_spa->nd_region)
2901 return -ENOMEM;
2902 break;
2903 }
2904
2905 return 0;
2906 }
2907
2908 static bool nfit_spa_is_virtual(struct acpi_nfit_system_address *spa)
2909 {
2910 return (nfit_spa_type(spa) == NFIT_SPA_VDISK ||
2911 nfit_spa_type(spa) == NFIT_SPA_VCD ||
2912 nfit_spa_type(spa) == NFIT_SPA_PDISK ||
2913 nfit_spa_type(spa) == NFIT_SPA_PCD);
2914 }
2915
2916 static bool nfit_spa_is_volatile(struct acpi_nfit_system_address *spa)
2917 {
2918 return (nfit_spa_type(spa) == NFIT_SPA_VDISK ||
2919 nfit_spa_type(spa) == NFIT_SPA_VCD ||
2920 nfit_spa_type(spa) == NFIT_SPA_VOLATILE);
2921 }
2922
2923 static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc,
2924 struct nfit_spa *nfit_spa)
2925 {
2926 static struct nd_mapping_desc mappings[ND_MAX_MAPPINGS];
2927 struct acpi_nfit_system_address *spa = nfit_spa->spa;
2928 struct nd_blk_region_desc ndbr_desc;
2929 struct nd_region_desc *ndr_desc;
2930 struct nfit_memdev *nfit_memdev;
2931 struct nvdimm_bus *nvdimm_bus;
2932 struct resource res;
2933 int count = 0, rc;
2934
2935 if (nfit_spa->nd_region)
2936 return 0;
2937
2938 if (spa->range_index == 0 && !nfit_spa_is_virtual(spa)) {
2939 dev_dbg(acpi_desc->dev, "detected invalid spa index\n");
2940 return 0;
2941 }
2942
2943 memset(&res, 0, sizeof(res));
2944 memset(&mappings, 0, sizeof(mappings));
2945 memset(&ndbr_desc, 0, sizeof(ndbr_desc));
2946 res.start = spa->address;
2947 res.end = res.start + spa->length - 1;
2948 ndr_desc = &ndbr_desc.ndr_desc;
2949 ndr_desc->res = &res;
2950 ndr_desc->provider_data = nfit_spa;
2951 ndr_desc->attr_groups = acpi_nfit_region_attribute_groups;
2952 if (spa->flags & ACPI_NFIT_PROXIMITY_VALID) {
2953 ndr_desc->numa_node = acpi_map_pxm_to_online_node(
2954 spa->proximity_domain);
2955 ndr_desc->target_node = acpi_map_pxm_to_node(
2956 spa->proximity_domain);
2957 } else {
2958 ndr_desc->numa_node = NUMA_NO_NODE;
2959 ndr_desc->target_node = NUMA_NO_NODE;
2960 }
2961
2962
2963
2964
2965
2966
2967 if (acpi_desc->platform_cap & ACPI_NFIT_CAPABILITY_CACHE_FLUSH)
2968 set_bit(ND_REGION_PERSIST_CACHE, &ndr_desc->flags);
2969 else if (acpi_desc->platform_cap & ACPI_NFIT_CAPABILITY_MEM_FLUSH)
2970 set_bit(ND_REGION_PERSIST_MEMCTRL, &ndr_desc->flags);
2971
2972 list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
2973 struct acpi_nfit_memory_map *memdev = nfit_memdev->memdev;
2974 struct nd_mapping_desc *mapping;
2975
2976 if (memdev->range_index != spa->range_index)
2977 continue;
2978 if (count >= ND_MAX_MAPPINGS) {
2979 dev_err(acpi_desc->dev, "spa%d exceeds max mappings %d\n",
2980 spa->range_index, ND_MAX_MAPPINGS);
2981 return -ENXIO;
2982 }
2983 mapping = &mappings[count++];
2984 rc = acpi_nfit_init_mapping(acpi_desc, mapping, ndr_desc,
2985 memdev, nfit_spa);
2986 if (rc)
2987 goto out;
2988 }
2989
2990 ndr_desc->mapping = mappings;
2991 ndr_desc->num_mappings = count;
2992 rc = acpi_nfit_init_interleave_set(acpi_desc, ndr_desc, spa);
2993 if (rc)
2994 goto out;
2995
2996 nvdimm_bus = acpi_desc->nvdimm_bus;
2997 if (nfit_spa_type(spa) == NFIT_SPA_PM) {
2998 rc = acpi_nfit_insert_resource(acpi_desc, ndr_desc);
2999 if (rc) {
3000 dev_warn(acpi_desc->dev,
3001 "failed to insert pmem resource to iomem: %d\n",
3002 rc);
3003 goto out;
3004 }
3005
3006 nfit_spa->nd_region = nvdimm_pmem_region_create(nvdimm_bus,
3007 ndr_desc);
3008 if (!nfit_spa->nd_region)
3009 rc = -ENOMEM;
3010 } else if (nfit_spa_is_volatile(spa)) {
3011 nfit_spa->nd_region = nvdimm_volatile_region_create(nvdimm_bus,
3012 ndr_desc);
3013 if (!nfit_spa->nd_region)
3014 rc = -ENOMEM;
3015 } else if (nfit_spa_is_virtual(spa)) {
3016 nfit_spa->nd_region = nvdimm_pmem_region_create(nvdimm_bus,
3017 ndr_desc);
3018 if (!nfit_spa->nd_region)
3019 rc = -ENOMEM;
3020 }
3021
3022 out:
3023 if (rc)
3024 dev_err(acpi_desc->dev, "failed to register spa range %d\n",
3025 nfit_spa->spa->range_index);
3026 return rc;
3027 }
3028
3029 static int ars_status_alloc(struct acpi_nfit_desc *acpi_desc)
3030 {
3031 struct device *dev = acpi_desc->dev;
3032 struct nd_cmd_ars_status *ars_status;
3033
3034 if (acpi_desc->ars_status) {
3035 memset(acpi_desc->ars_status, 0, acpi_desc->max_ars);
3036 return 0;
3037 }
3038
3039 ars_status = devm_kzalloc(dev, acpi_desc->max_ars, GFP_KERNEL);
3040 if (!ars_status)
3041 return -ENOMEM;
3042 acpi_desc->ars_status = ars_status;
3043 return 0;
3044 }
3045
3046 static int acpi_nfit_query_poison(struct acpi_nfit_desc *acpi_desc)
3047 {
3048 int rc;
3049
3050 if (ars_status_alloc(acpi_desc))
3051 return -ENOMEM;
3052
3053 rc = ars_get_status(acpi_desc);
3054
3055 if (rc < 0 && rc != -ENOSPC)
3056 return rc;
3057
3058 if (ars_status_process_records(acpi_desc))
3059 dev_err(acpi_desc->dev, "Failed to process ARS records\n");
3060
3061 return rc;
3062 }
3063
3064 static int ars_register(struct acpi_nfit_desc *acpi_desc,
3065 struct nfit_spa *nfit_spa)
3066 {
3067 int rc;
3068
3069 if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
3070 return acpi_nfit_register_region(acpi_desc, nfit_spa);
3071
3072 set_bit(ARS_REQ_SHORT, &nfit_spa->ars_state);
3073 if (!no_init_ars)
3074 set_bit(ARS_REQ_LONG, &nfit_spa->ars_state);
3075
3076 switch (acpi_nfit_query_poison(acpi_desc)) {
3077 case 0:
3078 case -ENOSPC:
3079 case -EAGAIN:
3080 rc = ars_start(acpi_desc, nfit_spa, ARS_REQ_SHORT);
3081
3082 if (rc == -EBUSY)
3083 break;
3084 if (rc) {
3085 set_bit(ARS_FAILED, &nfit_spa->ars_state);
3086 break;
3087 }
3088 clear_bit(ARS_REQ_SHORT, &nfit_spa->ars_state);
3089 rc = acpi_nfit_query_poison(acpi_desc);
3090 if (rc)
3091 break;
3092 acpi_desc->scrub_spa = nfit_spa;
3093 ars_complete(acpi_desc, nfit_spa);
3094
3095
3096
3097
3098
3099 acpi_desc->scrub_spa = NULL;
3100 break;
3101 case -EBUSY:
3102 case -ENOMEM:
3103
3104
3105
3106
3107
3108 break;
3109 default:
3110 set_bit(ARS_FAILED, &nfit_spa->ars_state);
3111 break;
3112 }
3113
3114 return acpi_nfit_register_region(acpi_desc, nfit_spa);
3115 }
3116
3117 static void ars_complete_all(struct acpi_nfit_desc *acpi_desc)
3118 {
3119 struct nfit_spa *nfit_spa;
3120
3121 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3122 if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
3123 continue;
3124 ars_complete(acpi_desc, nfit_spa);
3125 }
3126 }
3127
3128 static unsigned int __acpi_nfit_scrub(struct acpi_nfit_desc *acpi_desc,
3129 int query_rc)
3130 {
3131 unsigned int tmo = acpi_desc->scrub_tmo;
3132 struct device *dev = acpi_desc->dev;
3133 struct nfit_spa *nfit_spa;
3134
3135 lockdep_assert_held(&acpi_desc->init_mutex);
3136
3137 if (test_bit(ARS_CANCEL, &acpi_desc->scrub_flags))
3138 return 0;
3139
3140 if (query_rc == -EBUSY) {
3141 dev_dbg(dev, "ARS: ARS busy\n");
3142 return min(30U * 60U, tmo * 2);
3143 }
3144 if (query_rc == -ENOSPC) {
3145 dev_dbg(dev, "ARS: ARS continue\n");
3146 ars_continue(acpi_desc);
3147 return 1;
3148 }
3149 if (query_rc && query_rc != -EAGAIN) {
3150 unsigned long long addr, end;
3151
3152 addr = acpi_desc->ars_status->address;
3153 end = addr + acpi_desc->ars_status->length;
3154 dev_dbg(dev, "ARS: %llx-%llx failed (%d)\n", addr, end,
3155 query_rc);
3156 }
3157
3158 ars_complete_all(acpi_desc);
3159 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3160 enum nfit_ars_state req_type;
3161 int rc;
3162
3163 if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
3164 continue;
3165
3166
3167 if (test_bit(ARS_REQ_SHORT, &nfit_spa->ars_state))
3168 req_type = ARS_REQ_SHORT;
3169 else if (test_bit(ARS_REQ_LONG, &nfit_spa->ars_state))
3170 req_type = ARS_REQ_LONG;
3171 else
3172 continue;
3173 rc = ars_start(acpi_desc, nfit_spa, req_type);
3174
3175 dev = nd_region_dev(nfit_spa->nd_region);
3176 dev_dbg(dev, "ARS: range %d ARS start %s (%d)\n",
3177 nfit_spa->spa->range_index,
3178 req_type == ARS_REQ_SHORT ? "short" : "long",
3179 rc);
3180
3181
3182
3183
3184 if (rc == -EBUSY)
3185 return 1;
3186 if (rc == 0) {
3187 dev_WARN_ONCE(dev, acpi_desc->scrub_spa,
3188 "scrub start while range %d active\n",
3189 acpi_desc->scrub_spa->spa->range_index);
3190 clear_bit(req_type, &nfit_spa->ars_state);
3191 acpi_desc->scrub_spa = nfit_spa;
3192
3193
3194
3195
3196 list_move_tail(&nfit_spa->list, &acpi_desc->spas);
3197 return 1;
3198 }
3199
3200 dev_err(dev, "ARS: range %d ARS failed (%d)\n",
3201 nfit_spa->spa->range_index, rc);
3202 set_bit(ARS_FAILED, &nfit_spa->ars_state);
3203 }
3204 return 0;
3205 }
3206
3207 static void __sched_ars(struct acpi_nfit_desc *acpi_desc, unsigned int tmo)
3208 {
3209 lockdep_assert_held(&acpi_desc->init_mutex);
3210
3211 set_bit(ARS_BUSY, &acpi_desc->scrub_flags);
3212
3213 if (tmo)
3214 acpi_desc->scrub_tmo = tmo;
3215 queue_delayed_work(nfit_wq, &acpi_desc->dwork, tmo * HZ);
3216 }
3217
3218 static void sched_ars(struct acpi_nfit_desc *acpi_desc)
3219 {
3220 __sched_ars(acpi_desc, 0);
3221 }
3222
3223 static void notify_ars_done(struct acpi_nfit_desc *acpi_desc)
3224 {
3225 lockdep_assert_held(&acpi_desc->init_mutex);
3226
3227 clear_bit(ARS_BUSY, &acpi_desc->scrub_flags);
3228 acpi_desc->scrub_count++;
3229 if (acpi_desc->scrub_count_state)
3230 sysfs_notify_dirent(acpi_desc->scrub_count_state);
3231 }
3232
3233 static void acpi_nfit_scrub(struct work_struct *work)
3234 {
3235 struct acpi_nfit_desc *acpi_desc;
3236 unsigned int tmo;
3237 int query_rc;
3238
3239 acpi_desc = container_of(work, typeof(*acpi_desc), dwork.work);
3240 mutex_lock(&acpi_desc->init_mutex);
3241 query_rc = acpi_nfit_query_poison(acpi_desc);
3242 tmo = __acpi_nfit_scrub(acpi_desc, query_rc);
3243 if (tmo)
3244 __sched_ars(acpi_desc, tmo);
3245 else
3246 notify_ars_done(acpi_desc);
3247 memset(acpi_desc->ars_status, 0, acpi_desc->max_ars);
3248 clear_bit(ARS_POLL, &acpi_desc->scrub_flags);
3249 mutex_unlock(&acpi_desc->init_mutex);
3250 }
3251
3252 static void acpi_nfit_init_ars(struct acpi_nfit_desc *acpi_desc,
3253 struct nfit_spa *nfit_spa)
3254 {
3255 int type = nfit_spa_type(nfit_spa->spa);
3256 struct nd_cmd_ars_cap ars_cap;
3257 int rc;
3258
3259 set_bit(ARS_FAILED, &nfit_spa->ars_state);
3260 memset(&ars_cap, 0, sizeof(ars_cap));
3261 rc = ars_get_cap(acpi_desc, &ars_cap, nfit_spa);
3262 if (rc < 0)
3263 return;
3264
3265 if (type == NFIT_SPA_VOLATILE && ((ars_cap.status >> 16)
3266 & ND_ARS_VOLATILE) == 0)
3267 return;
3268 if (type == NFIT_SPA_PM && ((ars_cap.status >> 16)
3269 & ND_ARS_PERSISTENT) == 0)
3270 return;
3271
3272 nfit_spa->max_ars = ars_cap.max_ars_out;
3273 nfit_spa->clear_err_unit = ars_cap.clear_err_unit;
3274 acpi_desc->max_ars = max(nfit_spa->max_ars, acpi_desc->max_ars);
3275 clear_bit(ARS_FAILED, &nfit_spa->ars_state);
3276 }
3277
3278 static int acpi_nfit_register_regions(struct acpi_nfit_desc *acpi_desc)
3279 {
3280 struct nfit_spa *nfit_spa;
3281 int rc;
3282
3283 set_bit(ARS_VALID, &acpi_desc->scrub_flags);
3284 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3285 switch (nfit_spa_type(nfit_spa->spa)) {
3286 case NFIT_SPA_VOLATILE:
3287 case NFIT_SPA_PM:
3288 acpi_nfit_init_ars(acpi_desc, nfit_spa);
3289 break;
3290 }
3291 }
3292
3293 list_for_each_entry(nfit_spa, &acpi_desc->spas, list)
3294 switch (nfit_spa_type(nfit_spa->spa)) {
3295 case NFIT_SPA_VOLATILE:
3296 case NFIT_SPA_PM:
3297
3298 rc = ars_register(acpi_desc, nfit_spa);
3299 if (rc)
3300 return rc;
3301 break;
3302 case NFIT_SPA_BDW:
3303
3304 break;
3305 case NFIT_SPA_DCR:
3306 case NFIT_SPA_VDISK:
3307 case NFIT_SPA_VCD:
3308 case NFIT_SPA_PDISK:
3309 case NFIT_SPA_PCD:
3310
3311 rc = acpi_nfit_register_region(acpi_desc, nfit_spa);
3312 if (rc)
3313 return rc;
3314 break;
3315 default:
3316
3317 break;
3318 }
3319
3320 sched_ars(acpi_desc);
3321 return 0;
3322 }
3323
3324 static int acpi_nfit_check_deletions(struct acpi_nfit_desc *acpi_desc,
3325 struct nfit_table_prev *prev)
3326 {
3327 struct device *dev = acpi_desc->dev;
3328
3329 if (!list_empty(&prev->spas) ||
3330 !list_empty(&prev->memdevs) ||
3331 !list_empty(&prev->dcrs) ||
3332 !list_empty(&prev->bdws) ||
3333 !list_empty(&prev->idts) ||
3334 !list_empty(&prev->flushes)) {
3335 dev_err(dev, "new nfit deletes entries (unsupported)\n");
3336 return -ENXIO;
3337 }
3338 return 0;
3339 }
3340
3341 static int acpi_nfit_desc_init_scrub_attr(struct acpi_nfit_desc *acpi_desc)
3342 {
3343 struct device *dev = acpi_desc->dev;
3344 struct kernfs_node *nfit;
3345 struct device *bus_dev;
3346
3347 if (!ars_supported(acpi_desc->nvdimm_bus))
3348 return 0;
3349
3350 bus_dev = to_nvdimm_bus_dev(acpi_desc->nvdimm_bus);
3351 nfit = sysfs_get_dirent(bus_dev->kobj.sd, "nfit");
3352 if (!nfit) {
3353 dev_err(dev, "sysfs_get_dirent 'nfit' failed\n");
3354 return -ENODEV;
3355 }
3356 acpi_desc->scrub_count_state = sysfs_get_dirent(nfit, "scrub");
3357 sysfs_put(nfit);
3358 if (!acpi_desc->scrub_count_state) {
3359 dev_err(dev, "sysfs_get_dirent 'scrub' failed\n");
3360 return -ENODEV;
3361 }
3362
3363 return 0;
3364 }
3365
3366 static void acpi_nfit_unregister(void *data)
3367 {
3368 struct acpi_nfit_desc *acpi_desc = data;
3369
3370 nvdimm_bus_unregister(acpi_desc->nvdimm_bus);
3371 }
3372
3373 int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *data, acpi_size sz)
3374 {
3375 struct device *dev = acpi_desc->dev;
3376 struct nfit_table_prev prev;
3377 const void *end;
3378 int rc;
3379
3380 if (!acpi_desc->nvdimm_bus) {
3381 acpi_nfit_init_dsms(acpi_desc);
3382
3383 acpi_desc->nvdimm_bus = nvdimm_bus_register(dev,
3384 &acpi_desc->nd_desc);
3385 if (!acpi_desc->nvdimm_bus)
3386 return -ENOMEM;
3387
3388 rc = devm_add_action_or_reset(dev, acpi_nfit_unregister,
3389 acpi_desc);
3390 if (rc)
3391 return rc;
3392
3393 rc = acpi_nfit_desc_init_scrub_attr(acpi_desc);
3394 if (rc)
3395 return rc;
3396
3397
3398 mutex_lock(&acpi_desc_lock);
3399 list_add_tail(&acpi_desc->list, &acpi_descs);
3400 mutex_unlock(&acpi_desc_lock);
3401 }
3402
3403 mutex_lock(&acpi_desc->init_mutex);
3404
3405 INIT_LIST_HEAD(&prev.spas);
3406 INIT_LIST_HEAD(&prev.memdevs);
3407 INIT_LIST_HEAD(&prev.dcrs);
3408 INIT_LIST_HEAD(&prev.bdws);
3409 INIT_LIST_HEAD(&prev.idts);
3410 INIT_LIST_HEAD(&prev.flushes);
3411
3412 list_cut_position(&prev.spas, &acpi_desc->spas,
3413 acpi_desc->spas.prev);
3414 list_cut_position(&prev.memdevs, &acpi_desc->memdevs,
3415 acpi_desc->memdevs.prev);
3416 list_cut_position(&prev.dcrs, &acpi_desc->dcrs,
3417 acpi_desc->dcrs.prev);
3418 list_cut_position(&prev.bdws, &acpi_desc->bdws,
3419 acpi_desc->bdws.prev);
3420 list_cut_position(&prev.idts, &acpi_desc->idts,
3421 acpi_desc->idts.prev);
3422 list_cut_position(&prev.flushes, &acpi_desc->flushes,
3423 acpi_desc->flushes.prev);
3424
3425 end = data + sz;
3426 while (!IS_ERR_OR_NULL(data))
3427 data = add_table(acpi_desc, &prev, data, end);
3428
3429 if (IS_ERR(data)) {
3430 dev_dbg(dev, "nfit table parsing error: %ld\n", PTR_ERR(data));
3431 rc = PTR_ERR(data);
3432 goto out_unlock;
3433 }
3434
3435 rc = acpi_nfit_check_deletions(acpi_desc, &prev);
3436 if (rc)
3437 goto out_unlock;
3438
3439 rc = nfit_mem_init(acpi_desc);
3440 if (rc)
3441 goto out_unlock;
3442
3443 rc = acpi_nfit_register_dimms(acpi_desc);
3444 if (rc)
3445 goto out_unlock;
3446
3447 rc = acpi_nfit_register_regions(acpi_desc);
3448
3449 out_unlock:
3450 mutex_unlock(&acpi_desc->init_mutex);
3451 return rc;
3452 }
3453 EXPORT_SYMBOL_GPL(acpi_nfit_init);
3454
3455 static int acpi_nfit_flush_probe(struct nvdimm_bus_descriptor *nd_desc)
3456 {
3457 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
3458 struct device *dev = acpi_desc->dev;
3459
3460
3461 nfit_device_lock(dev);
3462 nfit_device_unlock(dev);
3463
3464
3465 mutex_lock(&acpi_desc->init_mutex);
3466 mutex_unlock(&acpi_desc->init_mutex);
3467
3468 return 0;
3469 }
3470
3471 static int __acpi_nfit_clear_to_send(struct nvdimm_bus_descriptor *nd_desc,
3472 struct nvdimm *nvdimm, unsigned int cmd)
3473 {
3474 struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
3475
3476 if (nvdimm)
3477 return 0;
3478 if (cmd != ND_CMD_ARS_START)
3479 return 0;
3480
3481
3482
3483
3484
3485
3486
3487 if (work_busy(&acpi_desc->dwork.work))
3488 return -EBUSY;
3489
3490 return 0;
3491 }
3492
3493
3494 static int acpi_nfit_clear_to_send(struct nvdimm_bus_descriptor *nd_desc,
3495 struct nvdimm *nvdimm, unsigned int cmd, void *buf)
3496 {
3497 struct nd_cmd_pkg *call_pkg = buf;
3498 unsigned int func;
3499
3500 if (nvdimm && cmd == ND_CMD_CALL &&
3501 call_pkg->nd_family == NVDIMM_FAMILY_INTEL) {
3502 func = call_pkg->nd_command;
3503 if (func > NVDIMM_CMD_MAX ||
3504 (1 << func) & NVDIMM_INTEL_SECURITY_CMDMASK)
3505 return -EOPNOTSUPP;
3506 }
3507
3508 return __acpi_nfit_clear_to_send(nd_desc, nvdimm, cmd);
3509 }
3510
3511 int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc,
3512 enum nfit_ars_state req_type)
3513 {
3514 struct device *dev = acpi_desc->dev;
3515 int scheduled = 0, busy = 0;
3516 struct nfit_spa *nfit_spa;
3517
3518 mutex_lock(&acpi_desc->init_mutex);
3519 if (test_bit(ARS_CANCEL, &acpi_desc->scrub_flags)) {
3520 mutex_unlock(&acpi_desc->init_mutex);
3521 return 0;
3522 }
3523
3524 list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
3525 int type = nfit_spa_type(nfit_spa->spa);
3526
3527 if (type != NFIT_SPA_PM && type != NFIT_SPA_VOLATILE)
3528 continue;
3529 if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
3530 continue;
3531
3532 if (test_and_set_bit(req_type, &nfit_spa->ars_state))
3533 busy++;
3534 else
3535 scheduled++;
3536 }
3537 if (scheduled) {
3538 sched_ars(acpi_desc);
3539 dev_dbg(dev, "ars_scan triggered\n");
3540 }
3541 mutex_unlock(&acpi_desc->init_mutex);
3542
3543 if (scheduled)
3544 return 0;
3545 if (busy)
3546 return -EBUSY;
3547 return -ENOTTY;
3548 }
3549
3550 void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev)
3551 {
3552 struct nvdimm_bus_descriptor *nd_desc;
3553
3554 dev_set_drvdata(dev, acpi_desc);
3555 acpi_desc->dev = dev;
3556 acpi_desc->blk_do_io = acpi_nfit_blk_region_do_io;
3557 nd_desc = &acpi_desc->nd_desc;
3558 nd_desc->provider_name = "ACPI.NFIT";
3559 nd_desc->module = THIS_MODULE;
3560 nd_desc->ndctl = acpi_nfit_ctl;
3561 nd_desc->flush_probe = acpi_nfit_flush_probe;
3562 nd_desc->clear_to_send = acpi_nfit_clear_to_send;
3563 nd_desc->attr_groups = acpi_nfit_attribute_groups;
3564
3565 INIT_LIST_HEAD(&acpi_desc->spas);
3566 INIT_LIST_HEAD(&acpi_desc->dcrs);
3567 INIT_LIST_HEAD(&acpi_desc->bdws);
3568 INIT_LIST_HEAD(&acpi_desc->idts);
3569 INIT_LIST_HEAD(&acpi_desc->flushes);
3570 INIT_LIST_HEAD(&acpi_desc->memdevs);
3571 INIT_LIST_HEAD(&acpi_desc->dimms);
3572 INIT_LIST_HEAD(&acpi_desc->list);
3573 mutex_init(&acpi_desc->init_mutex);
3574 acpi_desc->scrub_tmo = 1;
3575 INIT_DELAYED_WORK(&acpi_desc->dwork, acpi_nfit_scrub);
3576 }
3577 EXPORT_SYMBOL_GPL(acpi_nfit_desc_init);
3578
3579 static void acpi_nfit_put_table(void *table)
3580 {
3581 acpi_put_table(table);
3582 }
3583
3584 void acpi_nfit_shutdown(void *data)
3585 {
3586 struct acpi_nfit_desc *acpi_desc = data;
3587 struct device *bus_dev = to_nvdimm_bus_dev(acpi_desc->nvdimm_bus);
3588
3589
3590
3591
3592
3593 mutex_lock(&acpi_desc_lock);
3594 list_del(&acpi_desc->list);
3595 mutex_unlock(&acpi_desc_lock);
3596
3597 mutex_lock(&acpi_desc->init_mutex);
3598 set_bit(ARS_CANCEL, &acpi_desc->scrub_flags);
3599 cancel_delayed_work_sync(&acpi_desc->dwork);
3600 mutex_unlock(&acpi_desc->init_mutex);
3601
3602
3603
3604
3605
3606
3607 nfit_device_lock(bus_dev);
3608 nfit_device_unlock(bus_dev);
3609
3610 flush_workqueue(nfit_wq);
3611 }
3612 EXPORT_SYMBOL_GPL(acpi_nfit_shutdown);
3613
3614 static int acpi_nfit_add(struct acpi_device *adev)
3615 {
3616 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
3617 struct acpi_nfit_desc *acpi_desc;
3618 struct device *dev = &adev->dev;
3619 struct acpi_table_header *tbl;
3620 acpi_status status = AE_OK;
3621 acpi_size sz;
3622 int rc = 0;
3623
3624 status = acpi_get_table(ACPI_SIG_NFIT, 0, &tbl);
3625 if (ACPI_FAILURE(status)) {
3626
3627
3628
3629
3630
3631
3632
3633 dev_dbg(dev, "failed to find NFIT at startup\n");
3634 return 0;
3635 }
3636
3637 rc = devm_add_action_or_reset(dev, acpi_nfit_put_table, tbl);
3638 if (rc)
3639 return rc;
3640 sz = tbl->length;
3641
3642 acpi_desc = devm_kzalloc(dev, sizeof(*acpi_desc), GFP_KERNEL);
3643 if (!acpi_desc)
3644 return -ENOMEM;
3645 acpi_nfit_desc_init(acpi_desc, &adev->dev);
3646
3647
3648 acpi_desc->acpi_header = *tbl;
3649
3650
3651 status = acpi_evaluate_object(adev->handle, "_FIT", NULL, &buf);
3652 if (ACPI_SUCCESS(status) && buf.length > 0) {
3653 union acpi_object *obj = buf.pointer;
3654
3655 if (obj->type == ACPI_TYPE_BUFFER)
3656 rc = acpi_nfit_init(acpi_desc, obj->buffer.pointer,
3657 obj->buffer.length);
3658 else
3659 dev_dbg(dev, "invalid type %d, ignoring _FIT\n",
3660 (int) obj->type);
3661 kfree(buf.pointer);
3662 } else
3663
3664 rc = acpi_nfit_init(acpi_desc, (void *) tbl
3665 + sizeof(struct acpi_table_nfit),
3666 sz - sizeof(struct acpi_table_nfit));
3667
3668 if (rc)
3669 return rc;
3670 return devm_add_action_or_reset(dev, acpi_nfit_shutdown, acpi_desc);
3671 }
3672
3673 static int acpi_nfit_remove(struct acpi_device *adev)
3674 {
3675
3676 return 0;
3677 }
3678
3679 static void acpi_nfit_update_notify(struct device *dev, acpi_handle handle)
3680 {
3681 struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(dev);
3682 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
3683 union acpi_object *obj;
3684 acpi_status status;
3685 int ret;
3686
3687 if (!dev->driver) {
3688
3689 dev_dbg(dev, "no driver found for dev\n");
3690 return;
3691 }
3692
3693 if (!acpi_desc) {
3694 acpi_desc = devm_kzalloc(dev, sizeof(*acpi_desc), GFP_KERNEL);
3695 if (!acpi_desc)
3696 return;
3697 acpi_nfit_desc_init(acpi_desc, dev);
3698 } else {
3699
3700
3701
3702
3703 flush_workqueue(nfit_wq);
3704 }
3705
3706
3707 status = acpi_evaluate_object(handle, "_FIT", NULL, &buf);
3708 if (ACPI_FAILURE(status)) {
3709 dev_err(dev, "failed to evaluate _FIT\n");
3710 return;
3711 }
3712
3713 obj = buf.pointer;
3714 if (obj->type == ACPI_TYPE_BUFFER) {
3715 ret = acpi_nfit_init(acpi_desc, obj->buffer.pointer,
3716 obj->buffer.length);
3717 if (ret)
3718 dev_err(dev, "failed to merge updated NFIT\n");
3719 } else
3720 dev_err(dev, "Invalid _FIT\n");
3721 kfree(buf.pointer);
3722 }
3723
3724 static void acpi_nfit_uc_error_notify(struct device *dev, acpi_handle handle)
3725 {
3726 struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(dev);
3727
3728 if (acpi_desc->scrub_mode == HW_ERROR_SCRUB_ON)
3729 acpi_nfit_ars_rescan(acpi_desc, ARS_REQ_LONG);
3730 else
3731 acpi_nfit_ars_rescan(acpi_desc, ARS_REQ_SHORT);
3732 }
3733
3734 void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event)
3735 {
3736 dev_dbg(dev, "event: 0x%x\n", event);
3737
3738 switch (event) {
3739 case NFIT_NOTIFY_UPDATE:
3740 return acpi_nfit_update_notify(dev, handle);
3741 case NFIT_NOTIFY_UC_MEMORY_ERROR:
3742 return acpi_nfit_uc_error_notify(dev, handle);
3743 default:
3744 return;
3745 }
3746 }
3747 EXPORT_SYMBOL_GPL(__acpi_nfit_notify);
3748
3749 static void acpi_nfit_notify(struct acpi_device *adev, u32 event)
3750 {
3751 nfit_device_lock(&adev->dev);
3752 __acpi_nfit_notify(&adev->dev, adev->handle, event);
3753 nfit_device_unlock(&adev->dev);
3754 }
3755
3756 static const struct acpi_device_id acpi_nfit_ids[] = {
3757 { "ACPI0012", 0 },
3758 { "", 0 },
3759 };
3760 MODULE_DEVICE_TABLE(acpi, acpi_nfit_ids);
3761
3762 static struct acpi_driver acpi_nfit_driver = {
3763 .name = KBUILD_MODNAME,
3764 .ids = acpi_nfit_ids,
3765 .ops = {
3766 .add = acpi_nfit_add,
3767 .remove = acpi_nfit_remove,
3768 .notify = acpi_nfit_notify,
3769 },
3770 };
3771
3772 static __init int nfit_init(void)
3773 {
3774 int ret;
3775
3776 BUILD_BUG_ON(sizeof(struct acpi_table_nfit) != 40);
3777 BUILD_BUG_ON(sizeof(struct acpi_nfit_system_address) != 56);
3778 BUILD_BUG_ON(sizeof(struct acpi_nfit_memory_map) != 48);
3779 BUILD_BUG_ON(sizeof(struct acpi_nfit_interleave) != 20);
3780 BUILD_BUG_ON(sizeof(struct acpi_nfit_smbios) != 9);
3781 BUILD_BUG_ON(sizeof(struct acpi_nfit_control_region) != 80);
3782 BUILD_BUG_ON(sizeof(struct acpi_nfit_data_region) != 40);
3783 BUILD_BUG_ON(sizeof(struct acpi_nfit_capabilities) != 16);
3784
3785 guid_parse(UUID_VOLATILE_MEMORY, &nfit_uuid[NFIT_SPA_VOLATILE]);
3786 guid_parse(UUID_PERSISTENT_MEMORY, &nfit_uuid[NFIT_SPA_PM]);
3787 guid_parse(UUID_CONTROL_REGION, &nfit_uuid[NFIT_SPA_DCR]);
3788 guid_parse(UUID_DATA_REGION, &nfit_uuid[NFIT_SPA_BDW]);
3789 guid_parse(UUID_VOLATILE_VIRTUAL_DISK, &nfit_uuid[NFIT_SPA_VDISK]);
3790 guid_parse(UUID_VOLATILE_VIRTUAL_CD, &nfit_uuid[NFIT_SPA_VCD]);
3791 guid_parse(UUID_PERSISTENT_VIRTUAL_DISK, &nfit_uuid[NFIT_SPA_PDISK]);
3792 guid_parse(UUID_PERSISTENT_VIRTUAL_CD, &nfit_uuid[NFIT_SPA_PCD]);
3793 guid_parse(UUID_NFIT_BUS, &nfit_uuid[NFIT_DEV_BUS]);
3794 guid_parse(UUID_NFIT_DIMM, &nfit_uuid[NFIT_DEV_DIMM]);
3795 guid_parse(UUID_NFIT_DIMM_N_HPE1, &nfit_uuid[NFIT_DEV_DIMM_N_HPE1]);
3796 guid_parse(UUID_NFIT_DIMM_N_HPE2, &nfit_uuid[NFIT_DEV_DIMM_N_HPE2]);
3797 guid_parse(UUID_NFIT_DIMM_N_MSFT, &nfit_uuid[NFIT_DEV_DIMM_N_MSFT]);
3798 guid_parse(UUID_NFIT_DIMM_N_HYPERV, &nfit_uuid[NFIT_DEV_DIMM_N_HYPERV]);
3799
3800 nfit_wq = create_singlethread_workqueue("nfit");
3801 if (!nfit_wq)
3802 return -ENOMEM;
3803
3804 nfit_mce_register();
3805 ret = acpi_bus_register_driver(&acpi_nfit_driver);
3806 if (ret) {
3807 nfit_mce_unregister();
3808 destroy_workqueue(nfit_wq);
3809 }
3810
3811 return ret;
3812
3813 }
3814
3815 static __exit void nfit_exit(void)
3816 {
3817 nfit_mce_unregister();
3818 acpi_bus_unregister_driver(&acpi_nfit_driver);
3819 destroy_workqueue(nfit_wq);
3820 WARN_ON(!list_empty(&acpi_descs));
3821 }
3822
3823 module_init(nfit_init);
3824 module_exit(nfit_exit);
3825 MODULE_LICENSE("GPL v2");
3826 MODULE_AUTHOR("Intel Corporation");