2 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 #include <linux/list_sort.h>
14 #include <linux/libnvdimm.h>
15 #include <linux/module.h>
16 #include <linux/mutex.h>
17 #include <linux/ndctl.h>
18 #include <linux/sysfs.h>
19 #include <linux/delay.h>
20 #include <linux/list.h>
21 #include <linux/acpi.h>
22 #include <linux/sort.h>
23 #include <linux/pmem.h>
26 #include <asm/cacheflush.h>
30 * For readq() and writeq() on 32-bit builds, the hi-lo, lo-hi order is
33 #include <linux/io-64-nonatomic-hi-lo.h>
35 static bool force_enable_dimms
;
36 module_param(force_enable_dimms
, bool, S_IRUGO
|S_IWUSR
);
37 MODULE_PARM_DESC(force_enable_dimms
, "Ignore _STA (ACPI DIMM device) status");
39 static unsigned int scrub_timeout
= NFIT_ARS_TIMEOUT
;
40 module_param(scrub_timeout
, uint
, S_IRUGO
|S_IWUSR
);
41 MODULE_PARM_DESC(scrub_timeout
, "Initial scrub timeout in seconds");
43 /* after three payloads of overflow, it's dead jim */
44 static unsigned int scrub_overflow_abort
= 3;
45 module_param(scrub_overflow_abort
, uint
, S_IRUGO
|S_IWUSR
);
46 MODULE_PARM_DESC(scrub_overflow_abort
,
47 "Number of times we overflow ARS results before abort");
49 static bool disable_vendor_specific
;
50 module_param(disable_vendor_specific
, bool, S_IRUGO
);
51 MODULE_PARM_DESC(disable_vendor_specific
,
52 "Limit commands to the publicly specified set\n");
54 LIST_HEAD(acpi_descs
);
55 DEFINE_MUTEX(acpi_desc_lock
);
57 static struct workqueue_struct
*nfit_wq
;
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
;
68 static u8 nfit_uuid
[NFIT_UUID_MAX
][16];
70 const u8
*to_nfit_uuid(enum nfit_uuids id
)
74 EXPORT_SYMBOL(to_nfit_uuid
);
76 static struct acpi_nfit_desc
*to_acpi_nfit_desc(
77 struct nvdimm_bus_descriptor
*nd_desc
)
79 return container_of(nd_desc
, struct acpi_nfit_desc
, nd_desc
);
82 static struct acpi_device
*to_acpi_dev(struct acpi_nfit_desc
*acpi_desc
)
84 struct nvdimm_bus_descriptor
*nd_desc
= &acpi_desc
->nd_desc
;
87 * If provider == 'ACPI.NFIT' we can assume 'dev' is a struct
90 if (!nd_desc
->provider_name
91 || strcmp(nd_desc
->provider_name
, "ACPI.NFIT") != 0)
94 return to_acpi_device(acpi_desc
->dev
);
97 static int xlat_status(void *buf
, unsigned int cmd
, u32 status
)
99 struct nd_cmd_clear_error
*clear_err
;
100 struct nd_cmd_ars_status
*ars_status
;
105 if ((status
& 0xffff) == NFIT_ARS_CAP_NONE
)
112 /* No supported scan types for this range */
113 flags
= ND_ARS_PERSISTENT
| ND_ARS_VOLATILE
;
114 if ((status
>> 16 & flags
) == 0)
117 case ND_CMD_ARS_START
:
118 /* ARS is in progress */
119 if ((status
& 0xffff) == NFIT_ARS_START_BUSY
)
126 case ND_CMD_ARS_STATUS
:
131 /* Check extended status (Upper two bytes) */
132 if (status
== NFIT_ARS_STATUS_DONE
)
135 /* ARS is in progress */
136 if (status
== NFIT_ARS_STATUS_BUSY
)
139 /* No ARS performed for the current boot */
140 if (status
== NFIT_ARS_STATUS_NONE
)
144 * ARS interrupted, either we overflowed or some other
145 * agent wants the scan to stop. If we didn't overflow
146 * then just continue with the returned results.
148 if (status
== NFIT_ARS_STATUS_INTR
) {
149 if (ars_status
->flags
& NFIT_ARS_F_OVERFLOW
)
158 case ND_CMD_CLEAR_ERROR
:
162 if (!clear_err
->cleared
)
164 if (clear_err
->length
> clear_err
->cleared
)
165 return clear_err
->cleared
;
171 /* all other non-zero status results in an error */
177 static int acpi_nfit_ctl(struct nvdimm_bus_descriptor
*nd_desc
,
178 struct nvdimm
*nvdimm
, unsigned int cmd
, void *buf
,
179 unsigned int buf_len
, int *cmd_rc
)
181 struct acpi_nfit_desc
*acpi_desc
= to_acpi_nfit_desc(nd_desc
);
182 union acpi_object in_obj
, in_buf
, *out_obj
;
183 const struct nd_cmd_desc
*desc
= NULL
;
184 struct device
*dev
= acpi_desc
->dev
;
185 struct nd_cmd_pkg
*call_pkg
= NULL
;
186 const char *cmd_name
, *dimm_name
;
187 unsigned long cmd_mask
, dsm_mask
;
188 u32 offset
, fw_status
= 0;
195 if (cmd
== ND_CMD_CALL
) {
197 func
= call_pkg
->nd_command
;
201 struct nfit_mem
*nfit_mem
= nvdimm_provider_data(nvdimm
);
202 struct acpi_device
*adev
= nfit_mem
->adev
;
206 if (call_pkg
&& nfit_mem
->family
!= call_pkg
->nd_family
)
209 dimm_name
= nvdimm_name(nvdimm
);
210 cmd_name
= nvdimm_cmd_name(cmd
);
211 cmd_mask
= nvdimm_cmd_mask(nvdimm
);
212 dsm_mask
= nfit_mem
->dsm_mask
;
213 desc
= nd_cmd_dimm_desc(cmd
);
214 uuid
= to_nfit_uuid(nfit_mem
->family
);
215 handle
= adev
->handle
;
217 struct acpi_device
*adev
= to_acpi_dev(acpi_desc
);
219 cmd_name
= nvdimm_bus_cmd_name(cmd
);
220 cmd_mask
= nd_desc
->cmd_mask
;
222 desc
= nd_cmd_bus_desc(cmd
);
223 uuid
= to_nfit_uuid(NFIT_DEV_BUS
);
224 handle
= adev
->handle
;
228 if (!desc
|| (cmd
&& (desc
->out_num
+ desc
->in_num
== 0)))
231 if (!test_bit(cmd
, &cmd_mask
) || !test_bit(func
, &dsm_mask
))
234 in_obj
.type
= ACPI_TYPE_PACKAGE
;
235 in_obj
.package
.count
= 1;
236 in_obj
.package
.elements
= &in_buf
;
237 in_buf
.type
= ACPI_TYPE_BUFFER
;
238 in_buf
.buffer
.pointer
= buf
;
239 in_buf
.buffer
.length
= 0;
241 /* libnvdimm has already validated the input envelope */
242 for (i
= 0; i
< desc
->in_num
; i
++)
243 in_buf
.buffer
.length
+= nd_cmd_in_size(nvdimm
, cmd
, desc
,
247 /* skip over package wrapper */
248 in_buf
.buffer
.pointer
= (void *) &call_pkg
->nd_payload
;
249 in_buf
.buffer
.length
= call_pkg
->nd_size_in
;
252 if (IS_ENABLED(CONFIG_ACPI_NFIT_DEBUG
)) {
253 dev_dbg(dev
, "%s:%s cmd: %d: func: %d input length: %d\n",
254 __func__
, dimm_name
, cmd
, func
,
255 in_buf
.buffer
.length
);
256 print_hex_dump_debug("nvdimm in ", DUMP_PREFIX_OFFSET
, 4, 4,
257 in_buf
.buffer
.pointer
,
258 min_t(u32
, 256, in_buf
.buffer
.length
), true);
261 out_obj
= acpi_evaluate_dsm(handle
, uuid
, 1, func
, &in_obj
);
263 dev_dbg(dev
, "%s:%s _DSM failed cmd: %s\n", __func__
, dimm_name
,
269 call_pkg
->nd_fw_size
= out_obj
->buffer
.length
;
270 memcpy(call_pkg
->nd_payload
+ call_pkg
->nd_size_in
,
271 out_obj
->buffer
.pointer
,
272 min(call_pkg
->nd_fw_size
, call_pkg
->nd_size_out
));
276 * Need to support FW function w/o known size in advance.
277 * Caller can determine required size based upon nd_fw_size.
278 * If we return an error (like elsewhere) then caller wouldn't
279 * be able to rely upon data returned to make calculation.
284 if (out_obj
->package
.type
!= ACPI_TYPE_BUFFER
) {
285 dev_dbg(dev
, "%s:%s unexpected output object type cmd: %s type: %d\n",
286 __func__
, dimm_name
, cmd_name
, out_obj
->type
);
291 if (IS_ENABLED(CONFIG_ACPI_NFIT_DEBUG
)) {
292 dev_dbg(dev
, "%s:%s cmd: %s output length: %d\n", __func__
,
293 dimm_name
, cmd_name
, out_obj
->buffer
.length
);
294 print_hex_dump_debug(cmd_name
, DUMP_PREFIX_OFFSET
, 4,
295 4, out_obj
->buffer
.pointer
, min_t(u32
, 128,
296 out_obj
->buffer
.length
), true);
299 for (i
= 0, offset
= 0; i
< desc
->out_num
; i
++) {
300 u32 out_size
= nd_cmd_out_size(nvdimm
, cmd
, desc
, i
, buf
,
301 (u32
*) out_obj
->buffer
.pointer
);
303 if (offset
+ out_size
> out_obj
->buffer
.length
) {
304 dev_dbg(dev
, "%s:%s output object underflow cmd: %s field: %d\n",
305 __func__
, dimm_name
, cmd_name
, i
);
309 if (in_buf
.buffer
.length
+ offset
+ out_size
> buf_len
) {
310 dev_dbg(dev
, "%s:%s output overrun cmd: %s field: %d\n",
311 __func__
, dimm_name
, cmd_name
, i
);
315 memcpy(buf
+ in_buf
.buffer
.length
+ offset
,
316 out_obj
->buffer
.pointer
+ offset
, out_size
);
321 * Set fw_status for all the commands with a known format to be
322 * later interpreted by xlat_status().
324 if (i
>= 1 && ((cmd
>= ND_CMD_ARS_CAP
&& cmd
<= ND_CMD_CLEAR_ERROR
)
325 || (cmd
>= ND_CMD_SMART
&& cmd
<= ND_CMD_VENDOR
)))
326 fw_status
= *(u32
*) out_obj
->buffer
.pointer
;
328 if (offset
+ in_buf
.buffer
.length
< buf_len
) {
331 * status valid, return the number of bytes left
332 * unfilled in the output buffer
334 rc
= buf_len
- offset
- in_buf
.buffer
.length
;
336 *cmd_rc
= xlat_status(buf
, cmd
, fw_status
);
338 dev_err(dev
, "%s:%s underrun cmd: %s buf_len: %d out_len: %d\n",
339 __func__
, dimm_name
, cmd_name
, buf_len
,
346 *cmd_rc
= xlat_status(buf
, cmd
, fw_status
);
355 static const char *spa_type_name(u16 type
)
357 static const char *to_name
[] = {
358 [NFIT_SPA_VOLATILE
] = "volatile",
359 [NFIT_SPA_PM
] = "pmem",
360 [NFIT_SPA_DCR
] = "dimm-control-region",
361 [NFIT_SPA_BDW
] = "block-data-window",
362 [NFIT_SPA_VDISK
] = "volatile-disk",
363 [NFIT_SPA_VCD
] = "volatile-cd",
364 [NFIT_SPA_PDISK
] = "persistent-disk",
365 [NFIT_SPA_PCD
] = "persistent-cd",
369 if (type
> NFIT_SPA_PCD
)
372 return to_name
[type
];
375 int nfit_spa_type(struct acpi_nfit_system_address
*spa
)
379 for (i
= 0; i
< NFIT_UUID_MAX
; i
++)
380 if (memcmp(to_nfit_uuid(i
), spa
->range_guid
, 16) == 0)
385 static bool add_spa(struct acpi_nfit_desc
*acpi_desc
,
386 struct nfit_table_prev
*prev
,
387 struct acpi_nfit_system_address
*spa
)
389 struct device
*dev
= acpi_desc
->dev
;
390 struct nfit_spa
*nfit_spa
;
392 if (spa
->header
.length
!= sizeof(*spa
))
395 list_for_each_entry(nfit_spa
, &prev
->spas
, list
) {
396 if (memcmp(nfit_spa
->spa
, spa
, sizeof(*spa
)) == 0) {
397 list_move_tail(&nfit_spa
->list
, &acpi_desc
->spas
);
402 nfit_spa
= devm_kzalloc(dev
, sizeof(*nfit_spa
) + sizeof(*spa
),
406 INIT_LIST_HEAD(&nfit_spa
->list
);
407 memcpy(nfit_spa
->spa
, spa
, sizeof(*spa
));
408 list_add_tail(&nfit_spa
->list
, &acpi_desc
->spas
);
409 dev_dbg(dev
, "%s: spa index: %d type: %s\n", __func__
,
411 spa_type_name(nfit_spa_type(spa
)));
415 static bool add_memdev(struct acpi_nfit_desc
*acpi_desc
,
416 struct nfit_table_prev
*prev
,
417 struct acpi_nfit_memory_map
*memdev
)
419 struct device
*dev
= acpi_desc
->dev
;
420 struct nfit_memdev
*nfit_memdev
;
422 if (memdev
->header
.length
!= sizeof(*memdev
))
425 list_for_each_entry(nfit_memdev
, &prev
->memdevs
, list
)
426 if (memcmp(nfit_memdev
->memdev
, memdev
, sizeof(*memdev
)) == 0) {
427 list_move_tail(&nfit_memdev
->list
, &acpi_desc
->memdevs
);
431 nfit_memdev
= devm_kzalloc(dev
, sizeof(*nfit_memdev
) + sizeof(*memdev
),
435 INIT_LIST_HEAD(&nfit_memdev
->list
);
436 memcpy(nfit_memdev
->memdev
, memdev
, sizeof(*memdev
));
437 list_add_tail(&nfit_memdev
->list
, &acpi_desc
->memdevs
);
438 dev_dbg(dev
, "%s: memdev handle: %#x spa: %d dcr: %d\n",
439 __func__
, memdev
->device_handle
, memdev
->range_index
,
440 memdev
->region_index
);
445 * An implementation may provide a truncated control region if no block windows
448 static size_t sizeof_dcr(struct acpi_nfit_control_region
*dcr
)
450 if (dcr
->header
.length
< offsetof(struct acpi_nfit_control_region
,
455 return offsetof(struct acpi_nfit_control_region
, window_size
);
458 static bool add_dcr(struct acpi_nfit_desc
*acpi_desc
,
459 struct nfit_table_prev
*prev
,
460 struct acpi_nfit_control_region
*dcr
)
462 struct device
*dev
= acpi_desc
->dev
;
463 struct nfit_dcr
*nfit_dcr
;
465 if (!sizeof_dcr(dcr
))
468 list_for_each_entry(nfit_dcr
, &prev
->dcrs
, list
)
469 if (memcmp(nfit_dcr
->dcr
, dcr
, sizeof_dcr(dcr
)) == 0) {
470 list_move_tail(&nfit_dcr
->list
, &acpi_desc
->dcrs
);
474 nfit_dcr
= devm_kzalloc(dev
, sizeof(*nfit_dcr
) + sizeof(*dcr
),
478 INIT_LIST_HEAD(&nfit_dcr
->list
);
479 memcpy(nfit_dcr
->dcr
, dcr
, sizeof_dcr(dcr
));
480 list_add_tail(&nfit_dcr
->list
, &acpi_desc
->dcrs
);
481 dev_dbg(dev
, "%s: dcr index: %d windows: %d\n", __func__
,
482 dcr
->region_index
, dcr
->windows
);
486 static bool add_bdw(struct acpi_nfit_desc
*acpi_desc
,
487 struct nfit_table_prev
*prev
,
488 struct acpi_nfit_data_region
*bdw
)
490 struct device
*dev
= acpi_desc
->dev
;
491 struct nfit_bdw
*nfit_bdw
;
493 if (bdw
->header
.length
!= sizeof(*bdw
))
495 list_for_each_entry(nfit_bdw
, &prev
->bdws
, list
)
496 if (memcmp(nfit_bdw
->bdw
, bdw
, sizeof(*bdw
)) == 0) {
497 list_move_tail(&nfit_bdw
->list
, &acpi_desc
->bdws
);
501 nfit_bdw
= devm_kzalloc(dev
, sizeof(*nfit_bdw
) + sizeof(*bdw
),
505 INIT_LIST_HEAD(&nfit_bdw
->list
);
506 memcpy(nfit_bdw
->bdw
, bdw
, sizeof(*bdw
));
507 list_add_tail(&nfit_bdw
->list
, &acpi_desc
->bdws
);
508 dev_dbg(dev
, "%s: bdw dcr: %d windows: %d\n", __func__
,
509 bdw
->region_index
, bdw
->windows
);
513 static size_t sizeof_idt(struct acpi_nfit_interleave
*idt
)
515 if (idt
->header
.length
< sizeof(*idt
))
517 return sizeof(*idt
) + sizeof(u32
) * (idt
->line_count
- 1);
520 static bool add_idt(struct acpi_nfit_desc
*acpi_desc
,
521 struct nfit_table_prev
*prev
,
522 struct acpi_nfit_interleave
*idt
)
524 struct device
*dev
= acpi_desc
->dev
;
525 struct nfit_idt
*nfit_idt
;
527 if (!sizeof_idt(idt
))
530 list_for_each_entry(nfit_idt
, &prev
->idts
, list
) {
531 if (sizeof_idt(nfit_idt
->idt
) != sizeof_idt(idt
))
534 if (memcmp(nfit_idt
->idt
, idt
, sizeof_idt(idt
)) == 0) {
535 list_move_tail(&nfit_idt
->list
, &acpi_desc
->idts
);
540 nfit_idt
= devm_kzalloc(dev
, sizeof(*nfit_idt
) + sizeof_idt(idt
),
544 INIT_LIST_HEAD(&nfit_idt
->list
);
545 memcpy(nfit_idt
->idt
, idt
, sizeof_idt(idt
));
546 list_add_tail(&nfit_idt
->list
, &acpi_desc
->idts
);
547 dev_dbg(dev
, "%s: idt index: %d num_lines: %d\n", __func__
,
548 idt
->interleave_index
, idt
->line_count
);
552 static size_t sizeof_flush(struct acpi_nfit_flush_address
*flush
)
554 if (flush
->header
.length
< sizeof(*flush
))
556 return sizeof(*flush
) + sizeof(u64
) * (flush
->hint_count
- 1);
559 static bool add_flush(struct acpi_nfit_desc
*acpi_desc
,
560 struct nfit_table_prev
*prev
,
561 struct acpi_nfit_flush_address
*flush
)
563 struct device
*dev
= acpi_desc
->dev
;
564 struct nfit_flush
*nfit_flush
;
566 if (!sizeof_flush(flush
))
569 list_for_each_entry(nfit_flush
, &prev
->flushes
, list
) {
570 if (sizeof_flush(nfit_flush
->flush
) != sizeof_flush(flush
))
573 if (memcmp(nfit_flush
->flush
, flush
,
574 sizeof_flush(flush
)) == 0) {
575 list_move_tail(&nfit_flush
->list
, &acpi_desc
->flushes
);
580 nfit_flush
= devm_kzalloc(dev
, sizeof(*nfit_flush
)
581 + sizeof_flush(flush
), GFP_KERNEL
);
584 INIT_LIST_HEAD(&nfit_flush
->list
);
585 memcpy(nfit_flush
->flush
, flush
, sizeof_flush(flush
));
586 list_add_tail(&nfit_flush
->list
, &acpi_desc
->flushes
);
587 dev_dbg(dev
, "%s: nfit_flush handle: %d hint_count: %d\n", __func__
,
588 flush
->device_handle
, flush
->hint_count
);
592 static void *add_table(struct acpi_nfit_desc
*acpi_desc
,
593 struct nfit_table_prev
*prev
, void *table
, const void *end
)
595 struct device
*dev
= acpi_desc
->dev
;
596 struct acpi_nfit_header
*hdr
;
597 void *err
= ERR_PTR(-ENOMEM
);
604 dev_warn(dev
, "found a zero length table '%d' parsing nfit\n",
610 case ACPI_NFIT_TYPE_SYSTEM_ADDRESS
:
611 if (!add_spa(acpi_desc
, prev
, table
))
614 case ACPI_NFIT_TYPE_MEMORY_MAP
:
615 if (!add_memdev(acpi_desc
, prev
, table
))
618 case ACPI_NFIT_TYPE_CONTROL_REGION
:
619 if (!add_dcr(acpi_desc
, prev
, table
))
622 case ACPI_NFIT_TYPE_DATA_REGION
:
623 if (!add_bdw(acpi_desc
, prev
, table
))
626 case ACPI_NFIT_TYPE_INTERLEAVE
:
627 if (!add_idt(acpi_desc
, prev
, table
))
630 case ACPI_NFIT_TYPE_FLUSH_ADDRESS
:
631 if (!add_flush(acpi_desc
, prev
, table
))
634 case ACPI_NFIT_TYPE_SMBIOS
:
635 dev_dbg(dev
, "%s: smbios\n", __func__
);
638 dev_err(dev
, "unknown table '%d' parsing nfit\n", hdr
->type
);
642 return table
+ hdr
->length
;
645 static void nfit_mem_find_spa_bdw(struct acpi_nfit_desc
*acpi_desc
,
646 struct nfit_mem
*nfit_mem
)
648 u32 device_handle
= __to_nfit_memdev(nfit_mem
)->device_handle
;
649 u16 dcr
= nfit_mem
->dcr
->region_index
;
650 struct nfit_spa
*nfit_spa
;
652 list_for_each_entry(nfit_spa
, &acpi_desc
->spas
, list
) {
653 u16 range_index
= nfit_spa
->spa
->range_index
;
654 int type
= nfit_spa_type(nfit_spa
->spa
);
655 struct nfit_memdev
*nfit_memdev
;
657 if (type
!= NFIT_SPA_BDW
)
660 list_for_each_entry(nfit_memdev
, &acpi_desc
->memdevs
, list
) {
661 if (nfit_memdev
->memdev
->range_index
!= range_index
)
663 if (nfit_memdev
->memdev
->device_handle
!= device_handle
)
665 if (nfit_memdev
->memdev
->region_index
!= dcr
)
668 nfit_mem
->spa_bdw
= nfit_spa
->spa
;
673 dev_dbg(acpi_desc
->dev
, "SPA-BDW not found for SPA-DCR %d\n",
674 nfit_mem
->spa_dcr
->range_index
);
675 nfit_mem
->bdw
= NULL
;
678 static void nfit_mem_init_bdw(struct acpi_nfit_desc
*acpi_desc
,
679 struct nfit_mem
*nfit_mem
, struct acpi_nfit_system_address
*spa
)
681 u16 dcr
= __to_nfit_memdev(nfit_mem
)->region_index
;
682 struct nfit_memdev
*nfit_memdev
;
683 struct nfit_bdw
*nfit_bdw
;
684 struct nfit_idt
*nfit_idt
;
685 u16 idt_idx
, range_index
;
687 list_for_each_entry(nfit_bdw
, &acpi_desc
->bdws
, list
) {
688 if (nfit_bdw
->bdw
->region_index
!= dcr
)
690 nfit_mem
->bdw
= nfit_bdw
->bdw
;
697 nfit_mem_find_spa_bdw(acpi_desc
, nfit_mem
);
699 if (!nfit_mem
->spa_bdw
)
702 range_index
= nfit_mem
->spa_bdw
->range_index
;
703 list_for_each_entry(nfit_memdev
, &acpi_desc
->memdevs
, list
) {
704 if (nfit_memdev
->memdev
->range_index
!= range_index
||
705 nfit_memdev
->memdev
->region_index
!= dcr
)
707 nfit_mem
->memdev_bdw
= nfit_memdev
->memdev
;
708 idt_idx
= nfit_memdev
->memdev
->interleave_index
;
709 list_for_each_entry(nfit_idt
, &acpi_desc
->idts
, list
) {
710 if (nfit_idt
->idt
->interleave_index
!= idt_idx
)
712 nfit_mem
->idt_bdw
= nfit_idt
->idt
;
719 static int nfit_mem_dcr_init(struct acpi_nfit_desc
*acpi_desc
,
720 struct acpi_nfit_system_address
*spa
)
722 struct nfit_mem
*nfit_mem
, *found
;
723 struct nfit_memdev
*nfit_memdev
;
724 int type
= nfit_spa_type(spa
);
734 list_for_each_entry(nfit_memdev
, &acpi_desc
->memdevs
, list
) {
735 struct nfit_flush
*nfit_flush
;
736 struct nfit_dcr
*nfit_dcr
;
740 if (nfit_memdev
->memdev
->range_index
!= spa
->range_index
)
743 dcr
= nfit_memdev
->memdev
->region_index
;
744 device_handle
= nfit_memdev
->memdev
->device_handle
;
745 list_for_each_entry(nfit_mem
, &acpi_desc
->dimms
, list
)
746 if (__to_nfit_memdev(nfit_mem
)->device_handle
755 nfit_mem
= devm_kzalloc(acpi_desc
->dev
,
756 sizeof(*nfit_mem
), GFP_KERNEL
);
759 INIT_LIST_HEAD(&nfit_mem
->list
);
760 nfit_mem
->acpi_desc
= acpi_desc
;
761 list_add(&nfit_mem
->list
, &acpi_desc
->dimms
);
764 list_for_each_entry(nfit_dcr
, &acpi_desc
->dcrs
, list
) {
765 if (nfit_dcr
->dcr
->region_index
!= dcr
)
768 * Record the control region for the dimm. For
769 * the ACPI 6.1 case, where there are separate
770 * control regions for the pmem vs blk
771 * interfaces, be sure to record the extended
775 nfit_mem
->dcr
= nfit_dcr
->dcr
;
776 else if (nfit_mem
->dcr
->windows
== 0
777 && nfit_dcr
->dcr
->windows
)
778 nfit_mem
->dcr
= nfit_dcr
->dcr
;
782 list_for_each_entry(nfit_flush
, &acpi_desc
->flushes
, list
) {
783 struct acpi_nfit_flush_address
*flush
;
786 if (nfit_flush
->flush
->device_handle
!= device_handle
)
788 nfit_mem
->nfit_flush
= nfit_flush
;
789 flush
= nfit_flush
->flush
;
790 nfit_mem
->flush_wpq
= devm_kzalloc(acpi_desc
->dev
,
792 * sizeof(struct resource
), GFP_KERNEL
);
793 if (!nfit_mem
->flush_wpq
)
795 for (i
= 0; i
< flush
->hint_count
; i
++) {
796 struct resource
*res
= &nfit_mem
->flush_wpq
[i
];
798 res
->start
= flush
->hint_address
[i
];
799 res
->end
= res
->start
+ 8 - 1;
804 if (dcr
&& !nfit_mem
->dcr
) {
805 dev_err(acpi_desc
->dev
, "SPA %d missing DCR %d\n",
806 spa
->range_index
, dcr
);
810 if (type
== NFIT_SPA_DCR
) {
811 struct nfit_idt
*nfit_idt
;
814 /* multiple dimms may share a SPA when interleaved */
815 nfit_mem
->spa_dcr
= spa
;
816 nfit_mem
->memdev_dcr
= nfit_memdev
->memdev
;
817 idt_idx
= nfit_memdev
->memdev
->interleave_index
;
818 list_for_each_entry(nfit_idt
, &acpi_desc
->idts
, list
) {
819 if (nfit_idt
->idt
->interleave_index
!= idt_idx
)
821 nfit_mem
->idt_dcr
= nfit_idt
->idt
;
824 nfit_mem_init_bdw(acpi_desc
, nfit_mem
, spa
);
827 * A single dimm may belong to multiple SPA-PM
828 * ranges, record at least one in addition to
831 nfit_mem
->memdev_pmem
= nfit_memdev
->memdev
;
838 static int nfit_mem_cmp(void *priv
, struct list_head
*_a
, struct list_head
*_b
)
840 struct nfit_mem
*a
= container_of(_a
, typeof(*a
), list
);
841 struct nfit_mem
*b
= container_of(_b
, typeof(*b
), list
);
842 u32 handleA
, handleB
;
844 handleA
= __to_nfit_memdev(a
)->device_handle
;
845 handleB
= __to_nfit_memdev(b
)->device_handle
;
846 if (handleA
< handleB
)
848 else if (handleA
> handleB
)
853 static int nfit_mem_init(struct acpi_nfit_desc
*acpi_desc
)
855 struct nfit_spa
*nfit_spa
;
858 * For each SPA-DCR or SPA-PMEM address range find its
859 * corresponding MEMDEV(s). From each MEMDEV find the
860 * corresponding DCR. Then, if we're operating on a SPA-DCR,
861 * try to find a SPA-BDW and a corresponding BDW that references
862 * the DCR. Throw it all into an nfit_mem object. Note, that
865 list_for_each_entry(nfit_spa
, &acpi_desc
->spas
, list
) {
868 rc
= nfit_mem_dcr_init(acpi_desc
, nfit_spa
->spa
);
873 list_sort(NULL
, &acpi_desc
->dimms
, nfit_mem_cmp
);
878 static ssize_t
revision_show(struct device
*dev
,
879 struct device_attribute
*attr
, char *buf
)
881 struct nvdimm_bus
*nvdimm_bus
= to_nvdimm_bus(dev
);
882 struct nvdimm_bus_descriptor
*nd_desc
= to_nd_desc(nvdimm_bus
);
883 struct acpi_nfit_desc
*acpi_desc
= to_acpi_desc(nd_desc
);
885 return sprintf(buf
, "%d\n", acpi_desc
->acpi_header
.revision
);
887 static DEVICE_ATTR_RO(revision
);
890 * This shows the number of full Address Range Scrubs that have been
891 * completed since driver load time. Userspace can wait on this using
892 * select/poll etc. A '+' at the end indicates an ARS is in progress
894 static ssize_t
scrub_show(struct device
*dev
,
895 struct device_attribute
*attr
, char *buf
)
897 struct nvdimm_bus_descriptor
*nd_desc
;
901 nd_desc
= dev_get_drvdata(dev
);
903 struct acpi_nfit_desc
*acpi_desc
= to_acpi_desc(nd_desc
);
905 rc
= sprintf(buf
, "%d%s", acpi_desc
->scrub_count
,
906 (work_busy(&acpi_desc
->work
)) ? "+\n" : "\n");
912 static ssize_t
scrub_store(struct device
*dev
,
913 struct device_attribute
*attr
, const char *buf
, size_t size
)
915 struct nvdimm_bus_descriptor
*nd_desc
;
919 rc
= kstrtol(buf
, 0, &val
);
926 nd_desc
= dev_get_drvdata(dev
);
928 struct acpi_nfit_desc
*acpi_desc
= to_acpi_desc(nd_desc
);
930 rc
= acpi_nfit_ars_rescan(acpi_desc
);
937 static DEVICE_ATTR_RW(scrub
);
939 static bool ars_supported(struct nvdimm_bus
*nvdimm_bus
)
941 struct nvdimm_bus_descriptor
*nd_desc
= to_nd_desc(nvdimm_bus
);
942 const unsigned long mask
= 1 << ND_CMD_ARS_CAP
| 1 << ND_CMD_ARS_START
943 | 1 << ND_CMD_ARS_STATUS
;
945 return (nd_desc
->cmd_mask
& mask
) == mask
;
948 static umode_t
nfit_visible(struct kobject
*kobj
, struct attribute
*a
, int n
)
950 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
951 struct nvdimm_bus
*nvdimm_bus
= to_nvdimm_bus(dev
);
953 if (a
== &dev_attr_scrub
.attr
&& !ars_supported(nvdimm_bus
))
958 static struct attribute
*acpi_nfit_attributes
[] = {
959 &dev_attr_revision
.attr
,
960 &dev_attr_scrub
.attr
,
964 static struct attribute_group acpi_nfit_attribute_group
= {
966 .attrs
= acpi_nfit_attributes
,
967 .is_visible
= nfit_visible
,
970 static const struct attribute_group
*acpi_nfit_attribute_groups
[] = {
971 &nvdimm_bus_attribute_group
,
972 &acpi_nfit_attribute_group
,
976 static struct acpi_nfit_memory_map
*to_nfit_memdev(struct device
*dev
)
978 struct nvdimm
*nvdimm
= to_nvdimm(dev
);
979 struct nfit_mem
*nfit_mem
= nvdimm_provider_data(nvdimm
);
981 return __to_nfit_memdev(nfit_mem
);
984 static struct acpi_nfit_control_region
*to_nfit_dcr(struct device
*dev
)
986 struct nvdimm
*nvdimm
= to_nvdimm(dev
);
987 struct nfit_mem
*nfit_mem
= nvdimm_provider_data(nvdimm
);
989 return nfit_mem
->dcr
;
992 static ssize_t
handle_show(struct device
*dev
,
993 struct device_attribute
*attr
, char *buf
)
995 struct acpi_nfit_memory_map
*memdev
= to_nfit_memdev(dev
);
997 return sprintf(buf
, "%#x\n", memdev
->device_handle
);
999 static DEVICE_ATTR_RO(handle
);
1001 static ssize_t
phys_id_show(struct device
*dev
,
1002 struct device_attribute
*attr
, char *buf
)
1004 struct acpi_nfit_memory_map
*memdev
= to_nfit_memdev(dev
);
1006 return sprintf(buf
, "%#x\n", memdev
->physical_id
);
1008 static DEVICE_ATTR_RO(phys_id
);
1010 static ssize_t
vendor_show(struct device
*dev
,
1011 struct device_attribute
*attr
, char *buf
)
1013 struct acpi_nfit_control_region
*dcr
= to_nfit_dcr(dev
);
1015 return sprintf(buf
, "0x%04x\n", be16_to_cpu(dcr
->vendor_id
));
1017 static DEVICE_ATTR_RO(vendor
);
1019 static ssize_t
rev_id_show(struct device
*dev
,
1020 struct device_attribute
*attr
, char *buf
)
1022 struct acpi_nfit_control_region
*dcr
= to_nfit_dcr(dev
);
1024 return sprintf(buf
, "0x%04x\n", be16_to_cpu(dcr
->revision_id
));
1026 static DEVICE_ATTR_RO(rev_id
);
1028 static ssize_t
device_show(struct device
*dev
,
1029 struct device_attribute
*attr
, char *buf
)
1031 struct acpi_nfit_control_region
*dcr
= to_nfit_dcr(dev
);
1033 return sprintf(buf
, "0x%04x\n", be16_to_cpu(dcr
->device_id
));
1035 static DEVICE_ATTR_RO(device
);
1037 static ssize_t
subsystem_vendor_show(struct device
*dev
,
1038 struct device_attribute
*attr
, char *buf
)
1040 struct acpi_nfit_control_region
*dcr
= to_nfit_dcr(dev
);
1042 return sprintf(buf
, "0x%04x\n", be16_to_cpu(dcr
->subsystem_vendor_id
));
1044 static DEVICE_ATTR_RO(subsystem_vendor
);
1046 static ssize_t
subsystem_rev_id_show(struct device
*dev
,
1047 struct device_attribute
*attr
, char *buf
)
1049 struct acpi_nfit_control_region
*dcr
= to_nfit_dcr(dev
);
1051 return sprintf(buf
, "0x%04x\n",
1052 be16_to_cpu(dcr
->subsystem_revision_id
));
1054 static DEVICE_ATTR_RO(subsystem_rev_id
);
1056 static ssize_t
subsystem_device_show(struct device
*dev
,
1057 struct device_attribute
*attr
, char *buf
)
1059 struct acpi_nfit_control_region
*dcr
= to_nfit_dcr(dev
);
1061 return sprintf(buf
, "0x%04x\n", be16_to_cpu(dcr
->subsystem_device_id
));
1063 static DEVICE_ATTR_RO(subsystem_device
);
1065 static int num_nvdimm_formats(struct nvdimm
*nvdimm
)
1067 struct nfit_mem
*nfit_mem
= nvdimm_provider_data(nvdimm
);
1070 if (nfit_mem
->memdev_pmem
)
1072 if (nfit_mem
->memdev_bdw
)
1077 static ssize_t
format_show(struct device
*dev
,
1078 struct device_attribute
*attr
, char *buf
)
1080 struct acpi_nfit_control_region
*dcr
= to_nfit_dcr(dev
);
1082 return sprintf(buf
, "0x%04x\n", le16_to_cpu(dcr
->code
));
1084 static DEVICE_ATTR_RO(format
);
1086 static ssize_t
format1_show(struct device
*dev
,
1087 struct device_attribute
*attr
, char *buf
)
1090 ssize_t rc
= -ENXIO
;
1091 struct nfit_mem
*nfit_mem
;
1092 struct nfit_memdev
*nfit_memdev
;
1093 struct acpi_nfit_desc
*acpi_desc
;
1094 struct nvdimm
*nvdimm
= to_nvdimm(dev
);
1095 struct acpi_nfit_control_region
*dcr
= to_nfit_dcr(dev
);
1097 nfit_mem
= nvdimm_provider_data(nvdimm
);
1098 acpi_desc
= nfit_mem
->acpi_desc
;
1099 handle
= to_nfit_memdev(dev
)->device_handle
;
1101 /* assumes DIMMs have at most 2 published interface codes */
1102 mutex_lock(&acpi_desc
->init_mutex
);
1103 list_for_each_entry(nfit_memdev
, &acpi_desc
->memdevs
, list
) {
1104 struct acpi_nfit_memory_map
*memdev
= nfit_memdev
->memdev
;
1105 struct nfit_dcr
*nfit_dcr
;
1107 if (memdev
->device_handle
!= handle
)
1110 list_for_each_entry(nfit_dcr
, &acpi_desc
->dcrs
, list
) {
1111 if (nfit_dcr
->dcr
->region_index
!= memdev
->region_index
)
1113 if (nfit_dcr
->dcr
->code
== dcr
->code
)
1115 rc
= sprintf(buf
, "0x%04x\n",
1116 le16_to_cpu(nfit_dcr
->dcr
->code
));
1122 mutex_unlock(&acpi_desc
->init_mutex
);
1125 static DEVICE_ATTR_RO(format1
);
1127 static ssize_t
formats_show(struct device
*dev
,
1128 struct device_attribute
*attr
, char *buf
)
1130 struct nvdimm
*nvdimm
= to_nvdimm(dev
);
1132 return sprintf(buf
, "%d\n", num_nvdimm_formats(nvdimm
));
1134 static DEVICE_ATTR_RO(formats
);
1136 static ssize_t
serial_show(struct device
*dev
,
1137 struct device_attribute
*attr
, char *buf
)
1139 struct acpi_nfit_control_region
*dcr
= to_nfit_dcr(dev
);
1141 return sprintf(buf
, "0x%08x\n", be32_to_cpu(dcr
->serial_number
));
1143 static DEVICE_ATTR_RO(serial
);
1145 static ssize_t
family_show(struct device
*dev
,
1146 struct device_attribute
*attr
, char *buf
)
1148 struct nvdimm
*nvdimm
= to_nvdimm(dev
);
1149 struct nfit_mem
*nfit_mem
= nvdimm_provider_data(nvdimm
);
1151 if (nfit_mem
->family
< 0)
1153 return sprintf(buf
, "%d\n", nfit_mem
->family
);
1155 static DEVICE_ATTR_RO(family
);
1157 static ssize_t
dsm_mask_show(struct device
*dev
,
1158 struct device_attribute
*attr
, char *buf
)
1160 struct nvdimm
*nvdimm
= to_nvdimm(dev
);
1161 struct nfit_mem
*nfit_mem
= nvdimm_provider_data(nvdimm
);
1163 if (nfit_mem
->family
< 0)
1165 return sprintf(buf
, "%#lx\n", nfit_mem
->dsm_mask
);
1167 static DEVICE_ATTR_RO(dsm_mask
);
1169 static ssize_t
flags_show(struct device
*dev
,
1170 struct device_attribute
*attr
, char *buf
)
1172 u16 flags
= to_nfit_memdev(dev
)->flags
;
1174 return sprintf(buf
, "%s%s%s%s%s\n",
1175 flags
& ACPI_NFIT_MEM_SAVE_FAILED
? "save_fail " : "",
1176 flags
& ACPI_NFIT_MEM_RESTORE_FAILED
? "restore_fail " : "",
1177 flags
& ACPI_NFIT_MEM_FLUSH_FAILED
? "flush_fail " : "",
1178 flags
& ACPI_NFIT_MEM_NOT_ARMED
? "not_armed " : "",
1179 flags
& ACPI_NFIT_MEM_HEALTH_OBSERVED
? "smart_event " : "");
1181 static DEVICE_ATTR_RO(flags
);
1183 static ssize_t
id_show(struct device
*dev
,
1184 struct device_attribute
*attr
, char *buf
)
1186 struct acpi_nfit_control_region
*dcr
= to_nfit_dcr(dev
);
1188 if (dcr
->valid_fields
& ACPI_NFIT_CONTROL_MFG_INFO_VALID
)
1189 return sprintf(buf
, "%04x-%02x-%04x-%08x\n",
1190 be16_to_cpu(dcr
->vendor_id
),
1191 dcr
->manufacturing_location
,
1192 be16_to_cpu(dcr
->manufacturing_date
),
1193 be32_to_cpu(dcr
->serial_number
));
1195 return sprintf(buf
, "%04x-%08x\n",
1196 be16_to_cpu(dcr
->vendor_id
),
1197 be32_to_cpu(dcr
->serial_number
));
1199 static DEVICE_ATTR_RO(id
);
1201 static struct attribute
*acpi_nfit_dimm_attributes
[] = {
1202 &dev_attr_handle
.attr
,
1203 &dev_attr_phys_id
.attr
,
1204 &dev_attr_vendor
.attr
,
1205 &dev_attr_device
.attr
,
1206 &dev_attr_rev_id
.attr
,
1207 &dev_attr_subsystem_vendor
.attr
,
1208 &dev_attr_subsystem_device
.attr
,
1209 &dev_attr_subsystem_rev_id
.attr
,
1210 &dev_attr_format
.attr
,
1211 &dev_attr_formats
.attr
,
1212 &dev_attr_format1
.attr
,
1213 &dev_attr_serial
.attr
,
1214 &dev_attr_flags
.attr
,
1216 &dev_attr_family
.attr
,
1217 &dev_attr_dsm_mask
.attr
,
1221 static umode_t
acpi_nfit_dimm_attr_visible(struct kobject
*kobj
,
1222 struct attribute
*a
, int n
)
1224 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
1225 struct nvdimm
*nvdimm
= to_nvdimm(dev
);
1227 if (!to_nfit_dcr(dev
))
1229 if (a
== &dev_attr_format1
.attr
&& num_nvdimm_formats(nvdimm
) <= 1)
1234 static struct attribute_group acpi_nfit_dimm_attribute_group
= {
1236 .attrs
= acpi_nfit_dimm_attributes
,
1237 .is_visible
= acpi_nfit_dimm_attr_visible
,
1240 static const struct attribute_group
*acpi_nfit_dimm_attribute_groups
[] = {
1241 &nvdimm_attribute_group
,
1242 &nd_device_attribute_group
,
1243 &acpi_nfit_dimm_attribute_group
,
1247 static struct nvdimm
*acpi_nfit_dimm_by_handle(struct acpi_nfit_desc
*acpi_desc
,
1250 struct nfit_mem
*nfit_mem
;
1252 list_for_each_entry(nfit_mem
, &acpi_desc
->dimms
, list
)
1253 if (__to_nfit_memdev(nfit_mem
)->device_handle
== device_handle
)
1254 return nfit_mem
->nvdimm
;
1259 static int acpi_nfit_add_dimm(struct acpi_nfit_desc
*acpi_desc
,
1260 struct nfit_mem
*nfit_mem
, u32 device_handle
)
1262 struct acpi_device
*adev
, *adev_dimm
;
1263 struct device
*dev
= acpi_desc
->dev
;
1264 unsigned long dsm_mask
;
1268 /* nfit test assumes 1:1 relationship between commands and dsms */
1269 nfit_mem
->dsm_mask
= acpi_desc
->dimm_cmd_force_en
;
1270 nfit_mem
->family
= NVDIMM_FAMILY_INTEL
;
1271 adev
= to_acpi_dev(acpi_desc
);
1275 adev_dimm
= acpi_find_child_device(adev
, device_handle
, false);
1276 nfit_mem
->adev
= adev_dimm
;
1278 dev_err(dev
, "no ACPI.NFIT device with _ADR %#x, disabling...\n",
1280 return force_enable_dimms
? 0 : -ENODEV
;
1284 * Until standardization materializes we need to consider 4
1285 * different command sets. Note, that checking for function0 (bit0)
1286 * tells us if any commands are reachable through this uuid.
1288 for (i
= NVDIMM_FAMILY_INTEL
; i
<= NVDIMM_FAMILY_MSFT
; i
++)
1289 if (acpi_check_dsm(adev_dimm
->handle
, to_nfit_uuid(i
), 1, 1))
1292 /* limit the supported commands to those that are publicly documented */
1293 nfit_mem
->family
= i
;
1294 if (nfit_mem
->family
== NVDIMM_FAMILY_INTEL
) {
1296 if (disable_vendor_specific
)
1297 dsm_mask
&= ~(1 << ND_CMD_VENDOR
);
1298 } else if (nfit_mem
->family
== NVDIMM_FAMILY_HPE1
) {
1299 dsm_mask
= 0x1c3c76;
1300 } else if (nfit_mem
->family
== NVDIMM_FAMILY_HPE2
) {
1302 if (disable_vendor_specific
)
1303 dsm_mask
&= ~(1 << 8);
1304 } else if (nfit_mem
->family
== NVDIMM_FAMILY_MSFT
) {
1305 dsm_mask
= 0xffffffff;
1307 dev_dbg(dev
, "unknown dimm command family\n");
1308 nfit_mem
->family
= -1;
1309 /* DSMs are optional, continue loading the driver... */
1313 uuid
= to_nfit_uuid(nfit_mem
->family
);
1314 for_each_set_bit(i
, &dsm_mask
, BITS_PER_LONG
)
1315 if (acpi_check_dsm(adev_dimm
->handle
, uuid
, 1, 1ULL << i
))
1316 set_bit(i
, &nfit_mem
->dsm_mask
);
1321 static int acpi_nfit_register_dimms(struct acpi_nfit_desc
*acpi_desc
)
1323 struct nfit_mem
*nfit_mem
;
1326 list_for_each_entry(nfit_mem
, &acpi_desc
->dimms
, list
) {
1327 struct acpi_nfit_flush_address
*flush
;
1328 unsigned long flags
= 0, cmd_mask
;
1329 struct nvdimm
*nvdimm
;
1334 device_handle
= __to_nfit_memdev(nfit_mem
)->device_handle
;
1335 nvdimm
= acpi_nfit_dimm_by_handle(acpi_desc
, device_handle
);
1341 if (nfit_mem
->bdw
&& nfit_mem
->memdev_pmem
)
1342 flags
|= NDD_ALIASING
;
1344 mem_flags
= __to_nfit_memdev(nfit_mem
)->flags
;
1345 if (mem_flags
& ACPI_NFIT_MEM_NOT_ARMED
)
1346 flags
|= NDD_UNARMED
;
1348 rc
= acpi_nfit_add_dimm(acpi_desc
, nfit_mem
, device_handle
);
1353 * TODO: provide translation for non-NVDIMM_FAMILY_INTEL
1354 * devices (i.e. from nd_cmd to acpi_dsm) to standardize the
1355 * userspace interface.
1357 cmd_mask
= 1UL << ND_CMD_CALL
;
1358 if (nfit_mem
->family
== NVDIMM_FAMILY_INTEL
)
1359 cmd_mask
|= nfit_mem
->dsm_mask
;
1361 flush
= nfit_mem
->nfit_flush
? nfit_mem
->nfit_flush
->flush
1363 nvdimm
= nvdimm_create(acpi_desc
->nvdimm_bus
, nfit_mem
,
1364 acpi_nfit_dimm_attribute_groups
,
1365 flags
, cmd_mask
, flush
? flush
->hint_count
: 0,
1366 nfit_mem
->flush_wpq
);
1370 nfit_mem
->nvdimm
= nvdimm
;
1373 if ((mem_flags
& ACPI_NFIT_MEM_FAILED_MASK
) == 0)
1376 dev_info(acpi_desc
->dev
, "%s flags:%s%s%s%s\n",
1377 nvdimm_name(nvdimm
),
1378 mem_flags
& ACPI_NFIT_MEM_SAVE_FAILED
? " save_fail" : "",
1379 mem_flags
& ACPI_NFIT_MEM_RESTORE_FAILED
? " restore_fail":"",
1380 mem_flags
& ACPI_NFIT_MEM_FLUSH_FAILED
? " flush_fail" : "",
1381 mem_flags
& ACPI_NFIT_MEM_NOT_ARMED
? " not_armed" : "");
1385 return nvdimm_bus_check_dimm_count(acpi_desc
->nvdimm_bus
, dimm_count
);
1388 static void acpi_nfit_init_dsms(struct acpi_nfit_desc
*acpi_desc
)
1390 struct nvdimm_bus_descriptor
*nd_desc
= &acpi_desc
->nd_desc
;
1391 const u8
*uuid
= to_nfit_uuid(NFIT_DEV_BUS
);
1392 struct acpi_device
*adev
;
1395 nd_desc
->cmd_mask
= acpi_desc
->bus_cmd_force_en
;
1396 adev
= to_acpi_dev(acpi_desc
);
1400 for (i
= ND_CMD_ARS_CAP
; i
<= ND_CMD_CLEAR_ERROR
; i
++)
1401 if (acpi_check_dsm(adev
->handle
, uuid
, 1, 1ULL << i
))
1402 set_bit(i
, &nd_desc
->cmd_mask
);
1405 static ssize_t
range_index_show(struct device
*dev
,
1406 struct device_attribute
*attr
, char *buf
)
1408 struct nd_region
*nd_region
= to_nd_region(dev
);
1409 struct nfit_spa
*nfit_spa
= nd_region_provider_data(nd_region
);
1411 return sprintf(buf
, "%d\n", nfit_spa
->spa
->range_index
);
1413 static DEVICE_ATTR_RO(range_index
);
1415 static struct attribute
*acpi_nfit_region_attributes
[] = {
1416 &dev_attr_range_index
.attr
,
1420 static struct attribute_group acpi_nfit_region_attribute_group
= {
1422 .attrs
= acpi_nfit_region_attributes
,
1425 static const struct attribute_group
*acpi_nfit_region_attribute_groups
[] = {
1426 &nd_region_attribute_group
,
1427 &nd_mapping_attribute_group
,
1428 &nd_device_attribute_group
,
1429 &nd_numa_attribute_group
,
1430 &acpi_nfit_region_attribute_group
,
1434 /* enough info to uniquely specify an interleave set */
1435 struct nfit_set_info
{
1436 struct nfit_set_info_map
{
1443 static size_t sizeof_nfit_set_info(int num_mappings
)
1445 return sizeof(struct nfit_set_info
)
1446 + num_mappings
* sizeof(struct nfit_set_info_map
);
1449 static int cmp_map(const void *m0
, const void *m1
)
1451 const struct nfit_set_info_map
*map0
= m0
;
1452 const struct nfit_set_info_map
*map1
= m1
;
1454 return memcmp(&map0
->region_offset
, &map1
->region_offset
,
1458 /* Retrieve the nth entry referencing this spa */
1459 static struct acpi_nfit_memory_map
*memdev_from_spa(
1460 struct acpi_nfit_desc
*acpi_desc
, u16 range_index
, int n
)
1462 struct nfit_memdev
*nfit_memdev
;
1464 list_for_each_entry(nfit_memdev
, &acpi_desc
->memdevs
, list
)
1465 if (nfit_memdev
->memdev
->range_index
== range_index
)
1467 return nfit_memdev
->memdev
;
1471 static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc
*acpi_desc
,
1472 struct nd_region_desc
*ndr_desc
,
1473 struct acpi_nfit_system_address
*spa
)
1475 int i
, spa_type
= nfit_spa_type(spa
);
1476 struct device
*dev
= acpi_desc
->dev
;
1477 struct nd_interleave_set
*nd_set
;
1478 u16 nr
= ndr_desc
->num_mappings
;
1479 struct nfit_set_info
*info
;
1481 if (spa_type
== NFIT_SPA_PM
|| spa_type
== NFIT_SPA_VOLATILE
)
1486 nd_set
= devm_kzalloc(dev
, sizeof(*nd_set
), GFP_KERNEL
);
1490 info
= devm_kzalloc(dev
, sizeof_nfit_set_info(nr
), GFP_KERNEL
);
1493 for (i
= 0; i
< nr
; i
++) {
1494 struct nd_mapping
*nd_mapping
= &ndr_desc
->nd_mapping
[i
];
1495 struct nfit_set_info_map
*map
= &info
->mapping
[i
];
1496 struct nvdimm
*nvdimm
= nd_mapping
->nvdimm
;
1497 struct nfit_mem
*nfit_mem
= nvdimm_provider_data(nvdimm
);
1498 struct acpi_nfit_memory_map
*memdev
= memdev_from_spa(acpi_desc
,
1499 spa
->range_index
, i
);
1501 if (!memdev
|| !nfit_mem
->dcr
) {
1502 dev_err(dev
, "%s: failed to find DCR\n", __func__
);
1506 map
->region_offset
= memdev
->region_offset
;
1507 map
->serial_number
= nfit_mem
->dcr
->serial_number
;
1510 sort(&info
->mapping
[0], nr
, sizeof(struct nfit_set_info_map
),
1512 nd_set
->cookie
= nd_fletcher64(info
, sizeof_nfit_set_info(nr
), 0);
1513 ndr_desc
->nd_set
= nd_set
;
1514 devm_kfree(dev
, info
);
1519 static u64
to_interleave_offset(u64 offset
, struct nfit_blk_mmio
*mmio
)
1521 struct acpi_nfit_interleave
*idt
= mmio
->idt
;
1522 u32 sub_line_offset
, line_index
, line_offset
;
1523 u64 line_no
, table_skip_count
, table_offset
;
1525 line_no
= div_u64_rem(offset
, mmio
->line_size
, &sub_line_offset
);
1526 table_skip_count
= div_u64_rem(line_no
, mmio
->num_lines
, &line_index
);
1527 line_offset
= idt
->line_offset
[line_index
]
1529 table_offset
= table_skip_count
* mmio
->table_size
;
1531 return mmio
->base_offset
+ line_offset
+ table_offset
+ sub_line_offset
;
1534 static u32
read_blk_stat(struct nfit_blk
*nfit_blk
, unsigned int bw
)
1536 struct nfit_blk_mmio
*mmio
= &nfit_blk
->mmio
[DCR
];
1537 u64 offset
= nfit_blk
->stat_offset
+ mmio
->size
* bw
;
1538 const u32 STATUS_MASK
= 0x80000037;
1540 if (mmio
->num_lines
)
1541 offset
= to_interleave_offset(offset
, mmio
);
1543 return readl(mmio
->addr
.base
+ offset
) & STATUS_MASK
;
1546 static void write_blk_ctl(struct nfit_blk
*nfit_blk
, unsigned int bw
,
1547 resource_size_t dpa
, unsigned int len
, unsigned int write
)
1550 struct nfit_blk_mmio
*mmio
= &nfit_blk
->mmio
[DCR
];
1553 BCW_OFFSET_MASK
= (1ULL << 48)-1,
1555 BCW_LEN_MASK
= (1ULL << 8) - 1,
1559 cmd
= (dpa
>> L1_CACHE_SHIFT
) & BCW_OFFSET_MASK
;
1560 len
= len
>> L1_CACHE_SHIFT
;
1561 cmd
|= ((u64
) len
& BCW_LEN_MASK
) << BCW_LEN_SHIFT
;
1562 cmd
|= ((u64
) write
) << BCW_CMD_SHIFT
;
1564 offset
= nfit_blk
->cmd_offset
+ mmio
->size
* bw
;
1565 if (mmio
->num_lines
)
1566 offset
= to_interleave_offset(offset
, mmio
);
1568 writeq(cmd
, mmio
->addr
.base
+ offset
);
1569 nvdimm_flush(nfit_blk
->nd_region
);
1571 if (nfit_blk
->dimm_flags
& NFIT_BLK_DCR_LATCH
)
1572 readq(mmio
->addr
.base
+ offset
);
1575 static int acpi_nfit_blk_single_io(struct nfit_blk
*nfit_blk
,
1576 resource_size_t dpa
, void *iobuf
, size_t len
, int rw
,
1579 struct nfit_blk_mmio
*mmio
= &nfit_blk
->mmio
[BDW
];
1580 unsigned int copied
= 0;
1584 base_offset
= nfit_blk
->bdw_offset
+ dpa
% L1_CACHE_BYTES
1585 + lane
* mmio
->size
;
1586 write_blk_ctl(nfit_blk
, lane
, dpa
, len
, rw
);
1591 if (mmio
->num_lines
) {
1594 offset
= to_interleave_offset(base_offset
+ copied
,
1596 div_u64_rem(offset
, mmio
->line_size
, &line_offset
);
1597 c
= min_t(size_t, len
, mmio
->line_size
- line_offset
);
1599 offset
= base_offset
+ nfit_blk
->bdw_offset
;
1604 memcpy_to_pmem(mmio
->addr
.aperture
+ offset
,
1607 if (nfit_blk
->dimm_flags
& NFIT_BLK_READ_FLUSH
)
1608 mmio_flush_range((void __force
*)
1609 mmio
->addr
.aperture
+ offset
, c
);
1611 memcpy_from_pmem(iobuf
+ copied
,
1612 mmio
->addr
.aperture
+ offset
, c
);
1620 nvdimm_flush(nfit_blk
->nd_region
);
1622 rc
= read_blk_stat(nfit_blk
, lane
) ? -EIO
: 0;
1626 static int acpi_nfit_blk_region_do_io(struct nd_blk_region
*ndbr
,
1627 resource_size_t dpa
, void *iobuf
, u64 len
, int rw
)
1629 struct nfit_blk
*nfit_blk
= nd_blk_region_provider_data(ndbr
);
1630 struct nfit_blk_mmio
*mmio
= &nfit_blk
->mmio
[BDW
];
1631 struct nd_region
*nd_region
= nfit_blk
->nd_region
;
1632 unsigned int lane
, copied
= 0;
1635 lane
= nd_region_acquire_lane(nd_region
);
1637 u64 c
= min(len
, mmio
->size
);
1639 rc
= acpi_nfit_blk_single_io(nfit_blk
, dpa
+ copied
,
1640 iobuf
+ copied
, c
, rw
, lane
);
1647 nd_region_release_lane(nd_region
, lane
);
1652 static int nfit_blk_init_interleave(struct nfit_blk_mmio
*mmio
,
1653 struct acpi_nfit_interleave
*idt
, u16 interleave_ways
)
1656 mmio
->num_lines
= idt
->line_count
;
1657 mmio
->line_size
= idt
->line_size
;
1658 if (interleave_ways
== 0)
1660 mmio
->table_size
= mmio
->num_lines
* interleave_ways
1667 static int acpi_nfit_blk_get_flags(struct nvdimm_bus_descriptor
*nd_desc
,
1668 struct nvdimm
*nvdimm
, struct nfit_blk
*nfit_blk
)
1670 struct nd_cmd_dimm_flags flags
;
1673 memset(&flags
, 0, sizeof(flags
));
1674 rc
= nd_desc
->ndctl(nd_desc
, nvdimm
, ND_CMD_DIMM_FLAGS
, &flags
,
1675 sizeof(flags
), NULL
);
1677 if (rc
>= 0 && flags
.status
== 0)
1678 nfit_blk
->dimm_flags
= flags
.flags
;
1679 else if (rc
== -ENOTTY
) {
1680 /* fall back to a conservative default */
1681 nfit_blk
->dimm_flags
= NFIT_BLK_DCR_LATCH
| NFIT_BLK_READ_FLUSH
;
1689 static int acpi_nfit_blk_region_enable(struct nvdimm_bus
*nvdimm_bus
,
1692 struct nvdimm_bus_descriptor
*nd_desc
= to_nd_desc(nvdimm_bus
);
1693 struct nd_blk_region
*ndbr
= to_nd_blk_region(dev
);
1694 struct nfit_blk_mmio
*mmio
;
1695 struct nfit_blk
*nfit_blk
;
1696 struct nfit_mem
*nfit_mem
;
1697 struct nvdimm
*nvdimm
;
1700 nvdimm
= nd_blk_region_to_dimm(ndbr
);
1701 nfit_mem
= nvdimm_provider_data(nvdimm
);
1702 if (!nfit_mem
|| !nfit_mem
->dcr
|| !nfit_mem
->bdw
) {
1703 dev_dbg(dev
, "%s: missing%s%s%s\n", __func__
,
1704 nfit_mem
? "" : " nfit_mem",
1705 (nfit_mem
&& nfit_mem
->dcr
) ? "" : " dcr",
1706 (nfit_mem
&& nfit_mem
->bdw
) ? "" : " bdw");
1710 nfit_blk
= devm_kzalloc(dev
, sizeof(*nfit_blk
), GFP_KERNEL
);
1713 nd_blk_region_set_provider_data(ndbr
, nfit_blk
);
1714 nfit_blk
->nd_region
= to_nd_region(dev
);
1716 /* map block aperture memory */
1717 nfit_blk
->bdw_offset
= nfit_mem
->bdw
->offset
;
1718 mmio
= &nfit_blk
->mmio
[BDW
];
1719 mmio
->addr
.base
= devm_nvdimm_memremap(dev
, nfit_mem
->spa_bdw
->address
,
1720 nfit_mem
->spa_bdw
->length
, ARCH_MEMREMAP_PMEM
);
1721 if (!mmio
->addr
.base
) {
1722 dev_dbg(dev
, "%s: %s failed to map bdw\n", __func__
,
1723 nvdimm_name(nvdimm
));
1726 mmio
->size
= nfit_mem
->bdw
->size
;
1727 mmio
->base_offset
= nfit_mem
->memdev_bdw
->region_offset
;
1728 mmio
->idt
= nfit_mem
->idt_bdw
;
1729 mmio
->spa
= nfit_mem
->spa_bdw
;
1730 rc
= nfit_blk_init_interleave(mmio
, nfit_mem
->idt_bdw
,
1731 nfit_mem
->memdev_bdw
->interleave_ways
);
1733 dev_dbg(dev
, "%s: %s failed to init bdw interleave\n",
1734 __func__
, nvdimm_name(nvdimm
));
1738 /* map block control memory */
1739 nfit_blk
->cmd_offset
= nfit_mem
->dcr
->command_offset
;
1740 nfit_blk
->stat_offset
= nfit_mem
->dcr
->status_offset
;
1741 mmio
= &nfit_blk
->mmio
[DCR
];
1742 mmio
->addr
.base
= devm_nvdimm_ioremap(dev
, nfit_mem
->spa_dcr
->address
,
1743 nfit_mem
->spa_dcr
->length
);
1744 if (!mmio
->addr
.base
) {
1745 dev_dbg(dev
, "%s: %s failed to map dcr\n", __func__
,
1746 nvdimm_name(nvdimm
));
1749 mmio
->size
= nfit_mem
->dcr
->window_size
;
1750 mmio
->base_offset
= nfit_mem
->memdev_dcr
->region_offset
;
1751 mmio
->idt
= nfit_mem
->idt_dcr
;
1752 mmio
->spa
= nfit_mem
->spa_dcr
;
1753 rc
= nfit_blk_init_interleave(mmio
, nfit_mem
->idt_dcr
,
1754 nfit_mem
->memdev_dcr
->interleave_ways
);
1756 dev_dbg(dev
, "%s: %s failed to init dcr interleave\n",
1757 __func__
, nvdimm_name(nvdimm
));
1761 rc
= acpi_nfit_blk_get_flags(nd_desc
, nvdimm
, nfit_blk
);
1763 dev_dbg(dev
, "%s: %s failed get DIMM flags\n",
1764 __func__
, nvdimm_name(nvdimm
));
1768 if (nvdimm_has_flush(nfit_blk
->nd_region
) < 0)
1769 dev_warn(dev
, "unable to guarantee persistence of writes\n");
1771 if (mmio
->line_size
== 0)
1774 if ((u32
) nfit_blk
->cmd_offset
% mmio
->line_size
1775 + 8 > mmio
->line_size
) {
1776 dev_dbg(dev
, "cmd_offset crosses interleave boundary\n");
1778 } else if ((u32
) nfit_blk
->stat_offset
% mmio
->line_size
1779 + 8 > mmio
->line_size
) {
1780 dev_dbg(dev
, "stat_offset crosses interleave boundary\n");
1787 static int ars_get_cap(struct acpi_nfit_desc
*acpi_desc
,
1788 struct nd_cmd_ars_cap
*cmd
, struct nfit_spa
*nfit_spa
)
1790 struct nvdimm_bus_descriptor
*nd_desc
= &acpi_desc
->nd_desc
;
1791 struct acpi_nfit_system_address
*spa
= nfit_spa
->spa
;
1794 cmd
->address
= spa
->address
;
1795 cmd
->length
= spa
->length
;
1796 rc
= nd_desc
->ndctl(nd_desc
, NULL
, ND_CMD_ARS_CAP
, cmd
,
1797 sizeof(*cmd
), &cmd_rc
);
1803 static int ars_start(struct acpi_nfit_desc
*acpi_desc
, struct nfit_spa
*nfit_spa
)
1807 struct nd_cmd_ars_start ars_start
;
1808 struct acpi_nfit_system_address
*spa
= nfit_spa
->spa
;
1809 struct nvdimm_bus_descriptor
*nd_desc
= &acpi_desc
->nd_desc
;
1811 memset(&ars_start
, 0, sizeof(ars_start
));
1812 ars_start
.address
= spa
->address
;
1813 ars_start
.length
= spa
->length
;
1814 if (nfit_spa_type(spa
) == NFIT_SPA_PM
)
1815 ars_start
.type
= ND_ARS_PERSISTENT
;
1816 else if (nfit_spa_type(spa
) == NFIT_SPA_VOLATILE
)
1817 ars_start
.type
= ND_ARS_VOLATILE
;
1821 rc
= nd_desc
->ndctl(nd_desc
, NULL
, ND_CMD_ARS_START
, &ars_start
,
1822 sizeof(ars_start
), &cmd_rc
);
1829 static int ars_continue(struct acpi_nfit_desc
*acpi_desc
)
1832 struct nd_cmd_ars_start ars_start
;
1833 struct nvdimm_bus_descriptor
*nd_desc
= &acpi_desc
->nd_desc
;
1834 struct nd_cmd_ars_status
*ars_status
= acpi_desc
->ars_status
;
1836 memset(&ars_start
, 0, sizeof(ars_start
));
1837 ars_start
.address
= ars_status
->restart_address
;
1838 ars_start
.length
= ars_status
->restart_length
;
1839 ars_start
.type
= ars_status
->type
;
1840 rc
= nd_desc
->ndctl(nd_desc
, NULL
, ND_CMD_ARS_START
, &ars_start
,
1841 sizeof(ars_start
), &cmd_rc
);
1847 static int ars_get_status(struct acpi_nfit_desc
*acpi_desc
)
1849 struct nvdimm_bus_descriptor
*nd_desc
= &acpi_desc
->nd_desc
;
1850 struct nd_cmd_ars_status
*ars_status
= acpi_desc
->ars_status
;
1853 rc
= nd_desc
->ndctl(nd_desc
, NULL
, ND_CMD_ARS_STATUS
, ars_status
,
1854 acpi_desc
->ars_status_size
, &cmd_rc
);
1860 static int ars_status_process_records(struct nvdimm_bus
*nvdimm_bus
,
1861 struct nd_cmd_ars_status
*ars_status
)
1866 for (i
= 0; i
< ars_status
->num_records
; i
++) {
1867 rc
= nvdimm_bus_add_poison(nvdimm_bus
,
1868 ars_status
->records
[i
].err_address
,
1869 ars_status
->records
[i
].length
);
1877 static void acpi_nfit_remove_resource(void *data
)
1879 struct resource
*res
= data
;
1881 remove_resource(res
);
1884 static int acpi_nfit_insert_resource(struct acpi_nfit_desc
*acpi_desc
,
1885 struct nd_region_desc
*ndr_desc
)
1887 struct resource
*res
, *nd_res
= ndr_desc
->res
;
1890 /* No operation if the region is already registered as PMEM */
1891 is_pmem
= region_intersects(nd_res
->start
, resource_size(nd_res
),
1892 IORESOURCE_MEM
, IORES_DESC_PERSISTENT_MEMORY
);
1893 if (is_pmem
== REGION_INTERSECTS
)
1896 res
= devm_kzalloc(acpi_desc
->dev
, sizeof(*res
), GFP_KERNEL
);
1900 res
->name
= "Persistent Memory";
1901 res
->start
= nd_res
->start
;
1902 res
->end
= nd_res
->end
;
1903 res
->flags
= IORESOURCE_MEM
;
1904 res
->desc
= IORES_DESC_PERSISTENT_MEMORY
;
1906 ret
= insert_resource(&iomem_resource
, res
);
1910 ret
= devm_add_action_or_reset(acpi_desc
->dev
,
1911 acpi_nfit_remove_resource
,
1919 static int acpi_nfit_init_mapping(struct acpi_nfit_desc
*acpi_desc
,
1920 struct nd_mapping
*nd_mapping
, struct nd_region_desc
*ndr_desc
,
1921 struct acpi_nfit_memory_map
*memdev
,
1922 struct nfit_spa
*nfit_spa
)
1924 struct nvdimm
*nvdimm
= acpi_nfit_dimm_by_handle(acpi_desc
,
1925 memdev
->device_handle
);
1926 struct acpi_nfit_system_address
*spa
= nfit_spa
->spa
;
1927 struct nd_blk_region_desc
*ndbr_desc
;
1928 struct nfit_mem
*nfit_mem
;
1932 dev_err(acpi_desc
->dev
, "spa%d dimm: %#x not found\n",
1933 spa
->range_index
, memdev
->device_handle
);
1937 nd_mapping
->nvdimm
= nvdimm
;
1938 switch (nfit_spa_type(spa
)) {
1940 case NFIT_SPA_VOLATILE
:
1941 nd_mapping
->start
= memdev
->address
;
1942 nd_mapping
->size
= memdev
->region_size
;
1945 nfit_mem
= nvdimm_provider_data(nvdimm
);
1946 if (!nfit_mem
|| !nfit_mem
->bdw
) {
1947 dev_dbg(acpi_desc
->dev
, "spa%d %s missing bdw\n",
1948 spa
->range_index
, nvdimm_name(nvdimm
));
1950 nd_mapping
->size
= nfit_mem
->bdw
->capacity
;
1951 nd_mapping
->start
= nfit_mem
->bdw
->start_address
;
1952 ndr_desc
->num_lanes
= nfit_mem
->bdw
->windows
;
1956 ndr_desc
->nd_mapping
= nd_mapping
;
1957 ndr_desc
->num_mappings
= blk_valid
;
1958 ndbr_desc
= to_blk_region_desc(ndr_desc
);
1959 ndbr_desc
->enable
= acpi_nfit_blk_region_enable
;
1960 ndbr_desc
->do_io
= acpi_desc
->blk_do_io
;
1961 nfit_spa
->nd_region
= nvdimm_blk_region_create(acpi_desc
->nvdimm_bus
,
1963 if (!nfit_spa
->nd_region
)
1971 static bool nfit_spa_is_virtual(struct acpi_nfit_system_address
*spa
)
1973 return (nfit_spa_type(spa
) == NFIT_SPA_VDISK
||
1974 nfit_spa_type(spa
) == NFIT_SPA_VCD
||
1975 nfit_spa_type(spa
) == NFIT_SPA_PDISK
||
1976 nfit_spa_type(spa
) == NFIT_SPA_PCD
);
1979 static int acpi_nfit_register_region(struct acpi_nfit_desc
*acpi_desc
,
1980 struct nfit_spa
*nfit_spa
)
1982 static struct nd_mapping nd_mappings
[ND_MAX_MAPPINGS
];
1983 struct acpi_nfit_system_address
*spa
= nfit_spa
->spa
;
1984 struct nd_blk_region_desc ndbr_desc
;
1985 struct nd_region_desc
*ndr_desc
;
1986 struct nfit_memdev
*nfit_memdev
;
1987 struct nvdimm_bus
*nvdimm_bus
;
1988 struct resource res
;
1991 if (nfit_spa
->nd_region
)
1994 if (spa
->range_index
== 0 && !nfit_spa_is_virtual(spa
)) {
1995 dev_dbg(acpi_desc
->dev
, "%s: detected invalid spa index\n",
2000 memset(&res
, 0, sizeof(res
));
2001 memset(&nd_mappings
, 0, sizeof(nd_mappings
));
2002 memset(&ndbr_desc
, 0, sizeof(ndbr_desc
));
2003 res
.start
= spa
->address
;
2004 res
.end
= res
.start
+ spa
->length
- 1;
2005 ndr_desc
= &ndbr_desc
.ndr_desc
;
2006 ndr_desc
->res
= &res
;
2007 ndr_desc
->provider_data
= nfit_spa
;
2008 ndr_desc
->attr_groups
= acpi_nfit_region_attribute_groups
;
2009 if (spa
->flags
& ACPI_NFIT_PROXIMITY_VALID
)
2010 ndr_desc
->numa_node
= acpi_map_pxm_to_online_node(
2011 spa
->proximity_domain
);
2013 ndr_desc
->numa_node
= NUMA_NO_NODE
;
2015 list_for_each_entry(nfit_memdev
, &acpi_desc
->memdevs
, list
) {
2016 struct acpi_nfit_memory_map
*memdev
= nfit_memdev
->memdev
;
2017 struct nd_mapping
*nd_mapping
;
2019 if (memdev
->range_index
!= spa
->range_index
)
2021 if (count
>= ND_MAX_MAPPINGS
) {
2022 dev_err(acpi_desc
->dev
, "spa%d exceeds max mappings %d\n",
2023 spa
->range_index
, ND_MAX_MAPPINGS
);
2026 nd_mapping
= &nd_mappings
[count
++];
2027 rc
= acpi_nfit_init_mapping(acpi_desc
, nd_mapping
, ndr_desc
,
2033 ndr_desc
->nd_mapping
= nd_mappings
;
2034 ndr_desc
->num_mappings
= count
;
2035 rc
= acpi_nfit_init_interleave_set(acpi_desc
, ndr_desc
, spa
);
2039 nvdimm_bus
= acpi_desc
->nvdimm_bus
;
2040 if (nfit_spa_type(spa
) == NFIT_SPA_PM
) {
2041 rc
= acpi_nfit_insert_resource(acpi_desc
, ndr_desc
);
2043 dev_warn(acpi_desc
->dev
,
2044 "failed to insert pmem resource to iomem: %d\n",
2049 nfit_spa
->nd_region
= nvdimm_pmem_region_create(nvdimm_bus
,
2051 if (!nfit_spa
->nd_region
)
2053 } else if (nfit_spa_type(spa
) == NFIT_SPA_VOLATILE
) {
2054 nfit_spa
->nd_region
= nvdimm_volatile_region_create(nvdimm_bus
,
2056 if (!nfit_spa
->nd_region
)
2058 } else if (nfit_spa_is_virtual(spa
)) {
2059 nfit_spa
->nd_region
= nvdimm_pmem_region_create(nvdimm_bus
,
2061 if (!nfit_spa
->nd_region
)
2067 dev_err(acpi_desc
->dev
, "failed to register spa range %d\n",
2068 nfit_spa
->spa
->range_index
);
2072 static int ars_status_alloc(struct acpi_nfit_desc
*acpi_desc
,
2075 struct device
*dev
= acpi_desc
->dev
;
2076 struct nd_cmd_ars_status
*ars_status
;
2078 if (acpi_desc
->ars_status
&& acpi_desc
->ars_status_size
>= max_ars
) {
2079 memset(acpi_desc
->ars_status
, 0, acpi_desc
->ars_status_size
);
2083 if (acpi_desc
->ars_status
)
2084 devm_kfree(dev
, acpi_desc
->ars_status
);
2085 acpi_desc
->ars_status
= NULL
;
2086 ars_status
= devm_kzalloc(dev
, max_ars
, GFP_KERNEL
);
2089 acpi_desc
->ars_status
= ars_status
;
2090 acpi_desc
->ars_status_size
= max_ars
;
2094 static int acpi_nfit_query_poison(struct acpi_nfit_desc
*acpi_desc
,
2095 struct nfit_spa
*nfit_spa
)
2097 struct acpi_nfit_system_address
*spa
= nfit_spa
->spa
;
2100 if (!nfit_spa
->max_ars
) {
2101 struct nd_cmd_ars_cap ars_cap
;
2103 memset(&ars_cap
, 0, sizeof(ars_cap
));
2104 rc
= ars_get_cap(acpi_desc
, &ars_cap
, nfit_spa
);
2107 nfit_spa
->max_ars
= ars_cap
.max_ars_out
;
2108 nfit_spa
->clear_err_unit
= ars_cap
.clear_err_unit
;
2109 /* check that the supported scrub types match the spa type */
2110 if (nfit_spa_type(spa
) == NFIT_SPA_VOLATILE
&&
2111 ((ars_cap
.status
>> 16) & ND_ARS_VOLATILE
) == 0)
2113 else if (nfit_spa_type(spa
) == NFIT_SPA_PM
&&
2114 ((ars_cap
.status
>> 16) & ND_ARS_PERSISTENT
) == 0)
2118 if (ars_status_alloc(acpi_desc
, nfit_spa
->max_ars
))
2121 rc
= ars_get_status(acpi_desc
);
2122 if (rc
< 0 && rc
!= -ENOSPC
)
2125 if (ars_status_process_records(acpi_desc
->nvdimm_bus
,
2126 acpi_desc
->ars_status
))
2132 static void acpi_nfit_async_scrub(struct acpi_nfit_desc
*acpi_desc
,
2133 struct nfit_spa
*nfit_spa
)
2135 struct acpi_nfit_system_address
*spa
= nfit_spa
->spa
;
2136 unsigned int overflow_retry
= scrub_overflow_abort
;
2137 u64 init_ars_start
= 0, init_ars_len
= 0;
2138 struct device
*dev
= acpi_desc
->dev
;
2139 unsigned int tmo
= scrub_timeout
;
2142 if (!nfit_spa
->ars_required
|| !nfit_spa
->nd_region
)
2145 rc
= ars_start(acpi_desc
, nfit_spa
);
2147 * If we timed out the initial scan we'll still be busy here,
2148 * and will wait another timeout before giving up permanently.
2150 if (rc
< 0 && rc
!= -EBUSY
)
2154 u64 ars_start
, ars_len
;
2156 if (acpi_desc
->cancel
)
2158 rc
= acpi_nfit_query_poison(acpi_desc
, nfit_spa
);
2161 if (rc
== -EBUSY
&& !tmo
) {
2162 dev_warn(dev
, "range %d ars timeout, aborting\n",
2169 * Note, entries may be appended to the list
2170 * while the lock is dropped, but the workqueue
2171 * being active prevents entries being deleted /
2174 mutex_unlock(&acpi_desc
->init_mutex
);
2177 mutex_lock(&acpi_desc
->init_mutex
);
2181 /* we got some results, but there are more pending... */
2182 if (rc
== -ENOSPC
&& overflow_retry
--) {
2183 if (!init_ars_len
) {
2184 init_ars_len
= acpi_desc
->ars_status
->length
;
2185 init_ars_start
= acpi_desc
->ars_status
->address
;
2187 rc
= ars_continue(acpi_desc
);
2191 dev_warn(dev
, "range %d ars continuation failed\n",
2197 ars_start
= init_ars_start
;
2198 ars_len
= init_ars_len
;
2200 ars_start
= acpi_desc
->ars_status
->address
;
2201 ars_len
= acpi_desc
->ars_status
->length
;
2203 dev_dbg(dev
, "spa range: %d ars from %#llx + %#llx complete\n",
2204 spa
->range_index
, ars_start
, ars_len
);
2205 /* notify the region about new poison entries */
2206 nvdimm_region_notify(nfit_spa
->nd_region
,
2207 NVDIMM_REVALIDATE_POISON
);
2212 static void acpi_nfit_scrub(struct work_struct
*work
)
2215 u64 init_scrub_length
= 0;
2216 struct nfit_spa
*nfit_spa
;
2217 u64 init_scrub_address
= 0;
2218 bool init_ars_done
= false;
2219 struct acpi_nfit_desc
*acpi_desc
;
2220 unsigned int tmo
= scrub_timeout
;
2221 unsigned int overflow_retry
= scrub_overflow_abort
;
2223 acpi_desc
= container_of(work
, typeof(*acpi_desc
), work
);
2224 dev
= acpi_desc
->dev
;
2227 * We scrub in 2 phases. The first phase waits for any platform
2228 * firmware initiated scrubs to complete and then we go search for the
2229 * affected spa regions to mark them scanned. In the second phase we
2230 * initiate a directed scrub for every range that was not scrubbed in
2231 * phase 1. If we're called for a 'rescan', we harmlessly pass through
2232 * the first phase, but really only care about running phase 2, where
2233 * regions can be notified of new poison.
2236 /* process platform firmware initiated scrubs */
2238 mutex_lock(&acpi_desc
->init_mutex
);
2239 list_for_each_entry(nfit_spa
, &acpi_desc
->spas
, list
) {
2240 struct nd_cmd_ars_status
*ars_status
;
2241 struct acpi_nfit_system_address
*spa
;
2242 u64 ars_start
, ars_len
;
2245 if (acpi_desc
->cancel
)
2248 if (nfit_spa
->nd_region
)
2251 if (init_ars_done
) {
2253 * No need to re-query, we're now just
2254 * reconciling all the ranges covered by the
2259 rc
= acpi_nfit_query_poison(acpi_desc
, nfit_spa
);
2261 if (rc
== -ENOTTY
) {
2262 /* no ars capability, just register spa and move on */
2263 acpi_nfit_register_region(acpi_desc
, nfit_spa
);
2267 if (rc
== -EBUSY
&& !tmo
) {
2268 /* fallthrough to directed scrub in phase 2 */
2269 dev_warn(dev
, "timeout awaiting ars results, continuing...\n");
2271 } else if (rc
== -EBUSY
) {
2272 mutex_unlock(&acpi_desc
->init_mutex
);
2278 /* we got some results, but there are more pending... */
2279 if (rc
== -ENOSPC
&& overflow_retry
--) {
2280 ars_status
= acpi_desc
->ars_status
;
2282 * Record the original scrub range, so that we
2283 * can recall all the ranges impacted by the
2286 if (!init_scrub_length
) {
2287 init_scrub_length
= ars_status
->length
;
2288 init_scrub_address
= ars_status
->address
;
2290 rc
= ars_continue(acpi_desc
);
2292 mutex_unlock(&acpi_desc
->init_mutex
);
2299 * Initial scrub failed, we'll give it one more
2305 /* We got some final results, record completed ranges */
2306 ars_status
= acpi_desc
->ars_status
;
2307 if (init_scrub_length
) {
2308 ars_start
= init_scrub_address
;
2309 ars_len
= ars_start
+ init_scrub_length
;
2311 ars_start
= ars_status
->address
;
2312 ars_len
= ars_status
->length
;
2314 spa
= nfit_spa
->spa
;
2316 if (!init_ars_done
) {
2317 init_ars_done
= true;
2318 dev_dbg(dev
, "init scrub %#llx + %#llx complete\n",
2319 ars_start
, ars_len
);
2321 if (ars_start
<= spa
->address
&& ars_start
+ ars_len
2322 >= spa
->address
+ spa
->length
)
2323 acpi_nfit_register_region(acpi_desc
, nfit_spa
);
2327 * For all the ranges not covered by an initial scrub we still
2328 * want to see if there are errors, but it's ok to discover them
2331 list_for_each_entry(nfit_spa
, &acpi_desc
->spas
, list
) {
2333 * Flag all the ranges that still need scrubbing, but
2334 * register them now to make data available.
2336 if (!nfit_spa
->nd_region
) {
2337 nfit_spa
->ars_required
= 1;
2338 acpi_nfit_register_region(acpi_desc
, nfit_spa
);
2342 list_for_each_entry(nfit_spa
, &acpi_desc
->spas
, list
)
2343 acpi_nfit_async_scrub(acpi_desc
, nfit_spa
);
2344 acpi_desc
->scrub_count
++;
2345 if (acpi_desc
->scrub_count_state
)
2346 sysfs_notify_dirent(acpi_desc
->scrub_count_state
);
2347 mutex_unlock(&acpi_desc
->init_mutex
);
2350 static int acpi_nfit_register_regions(struct acpi_nfit_desc
*acpi_desc
)
2352 struct nfit_spa
*nfit_spa
;
2355 list_for_each_entry(nfit_spa
, &acpi_desc
->spas
, list
)
2356 if (nfit_spa_type(nfit_spa
->spa
) == NFIT_SPA_DCR
) {
2357 /* BLK regions don't need to wait for ars results */
2358 rc
= acpi_nfit_register_region(acpi_desc
, nfit_spa
);
2363 queue_work(nfit_wq
, &acpi_desc
->work
);
2367 static int acpi_nfit_check_deletions(struct acpi_nfit_desc
*acpi_desc
,
2368 struct nfit_table_prev
*prev
)
2370 struct device
*dev
= acpi_desc
->dev
;
2372 if (!list_empty(&prev
->spas
) ||
2373 !list_empty(&prev
->memdevs
) ||
2374 !list_empty(&prev
->dcrs
) ||
2375 !list_empty(&prev
->bdws
) ||
2376 !list_empty(&prev
->idts
) ||
2377 !list_empty(&prev
->flushes
)) {
2378 dev_err(dev
, "new nfit deletes entries (unsupported)\n");
2384 static int acpi_nfit_desc_init_scrub_attr(struct acpi_nfit_desc
*acpi_desc
)
2386 struct device
*dev
= acpi_desc
->dev
;
2387 struct kernfs_node
*nfit
;
2388 struct device
*bus_dev
;
2390 if (!ars_supported(acpi_desc
->nvdimm_bus
))
2393 bus_dev
= to_nvdimm_bus_dev(acpi_desc
->nvdimm_bus
);
2394 nfit
= sysfs_get_dirent(bus_dev
->kobj
.sd
, "nfit");
2396 dev_err(dev
, "sysfs_get_dirent 'nfit' failed\n");
2399 acpi_desc
->scrub_count_state
= sysfs_get_dirent(nfit
, "scrub");
2401 if (!acpi_desc
->scrub_count_state
) {
2402 dev_err(dev
, "sysfs_get_dirent 'scrub' failed\n");
2409 static void acpi_nfit_destruct(void *data
)
2411 struct acpi_nfit_desc
*acpi_desc
= data
;
2412 struct device
*bus_dev
= to_nvdimm_bus_dev(acpi_desc
->nvdimm_bus
);
2415 * Destruct under acpi_desc_lock so that nfit_handle_mce does not
2418 mutex_lock(&acpi_desc_lock
);
2419 acpi_desc
->cancel
= 1;
2421 * Bounce the nvdimm bus lock to make sure any in-flight
2422 * acpi_nfit_ars_rescan() submissions have had a chance to
2423 * either submit or see ->cancel set.
2425 device_lock(bus_dev
);
2426 device_unlock(bus_dev
);
2428 flush_workqueue(nfit_wq
);
2429 if (acpi_desc
->scrub_count_state
)
2430 sysfs_put(acpi_desc
->scrub_count_state
);
2431 nvdimm_bus_unregister(acpi_desc
->nvdimm_bus
);
2432 acpi_desc
->nvdimm_bus
= NULL
;
2433 list_del(&acpi_desc
->list
);
2434 mutex_unlock(&acpi_desc_lock
);
2437 int acpi_nfit_init(struct acpi_nfit_desc
*acpi_desc
, void *data
, acpi_size sz
)
2439 struct device
*dev
= acpi_desc
->dev
;
2440 struct nfit_table_prev prev
;
2444 if (!acpi_desc
->nvdimm_bus
) {
2445 acpi_nfit_init_dsms(acpi_desc
);
2447 acpi_desc
->nvdimm_bus
= nvdimm_bus_register(dev
,
2448 &acpi_desc
->nd_desc
);
2449 if (!acpi_desc
->nvdimm_bus
)
2452 rc
= devm_add_action_or_reset(dev
, acpi_nfit_destruct
,
2457 rc
= acpi_nfit_desc_init_scrub_attr(acpi_desc
);
2461 /* register this acpi_desc for mce notifications */
2462 mutex_lock(&acpi_desc_lock
);
2463 list_add_tail(&acpi_desc
->list
, &acpi_descs
);
2464 mutex_unlock(&acpi_desc_lock
);
2467 mutex_lock(&acpi_desc
->init_mutex
);
2469 INIT_LIST_HEAD(&prev
.spas
);
2470 INIT_LIST_HEAD(&prev
.memdevs
);
2471 INIT_LIST_HEAD(&prev
.dcrs
);
2472 INIT_LIST_HEAD(&prev
.bdws
);
2473 INIT_LIST_HEAD(&prev
.idts
);
2474 INIT_LIST_HEAD(&prev
.flushes
);
2476 list_cut_position(&prev
.spas
, &acpi_desc
->spas
,
2477 acpi_desc
->spas
.prev
);
2478 list_cut_position(&prev
.memdevs
, &acpi_desc
->memdevs
,
2479 acpi_desc
->memdevs
.prev
);
2480 list_cut_position(&prev
.dcrs
, &acpi_desc
->dcrs
,
2481 acpi_desc
->dcrs
.prev
);
2482 list_cut_position(&prev
.bdws
, &acpi_desc
->bdws
,
2483 acpi_desc
->bdws
.prev
);
2484 list_cut_position(&prev
.idts
, &acpi_desc
->idts
,
2485 acpi_desc
->idts
.prev
);
2486 list_cut_position(&prev
.flushes
, &acpi_desc
->flushes
,
2487 acpi_desc
->flushes
.prev
);
2490 while (!IS_ERR_OR_NULL(data
))
2491 data
= add_table(acpi_desc
, &prev
, data
, end
);
2494 dev_dbg(dev
, "%s: nfit table parsing error: %ld\n", __func__
,
2500 rc
= acpi_nfit_check_deletions(acpi_desc
, &prev
);
2504 rc
= nfit_mem_init(acpi_desc
);
2508 rc
= acpi_nfit_register_dimms(acpi_desc
);
2512 rc
= acpi_nfit_register_regions(acpi_desc
);
2515 mutex_unlock(&acpi_desc
->init_mutex
);
2518 EXPORT_SYMBOL_GPL(acpi_nfit_init
);
2520 struct acpi_nfit_flush_work
{
2521 struct work_struct work
;
2522 struct completion cmp
;
2525 static void flush_probe(struct work_struct
*work
)
2527 struct acpi_nfit_flush_work
*flush
;
2529 flush
= container_of(work
, typeof(*flush
), work
);
2530 complete(&flush
->cmp
);
2533 static int acpi_nfit_flush_probe(struct nvdimm_bus_descriptor
*nd_desc
)
2535 struct acpi_nfit_desc
*acpi_desc
= to_acpi_nfit_desc(nd_desc
);
2536 struct device
*dev
= acpi_desc
->dev
;
2537 struct acpi_nfit_flush_work flush
;
2539 /* bounce the device lock to flush acpi_nfit_add / acpi_nfit_notify */
2544 * Scrub work could take 10s of seconds, userspace may give up so we
2545 * need to be interruptible while waiting.
2547 INIT_WORK_ONSTACK(&flush
.work
, flush_probe
);
2548 COMPLETION_INITIALIZER_ONSTACK(flush
.cmp
);
2549 queue_work(nfit_wq
, &flush
.work
);
2550 return wait_for_completion_interruptible(&flush
.cmp
);
2553 static int acpi_nfit_clear_to_send(struct nvdimm_bus_descriptor
*nd_desc
,
2554 struct nvdimm
*nvdimm
, unsigned int cmd
)
2556 struct acpi_nfit_desc
*acpi_desc
= to_acpi_nfit_desc(nd_desc
);
2560 if (cmd
!= ND_CMD_ARS_START
)
2564 * The kernel and userspace may race to initiate a scrub, but
2565 * the scrub thread is prepared to lose that initial race. It
2566 * just needs guarantees that any ars it initiates are not
2567 * interrupted by any intervening start reqeusts from userspace.
2569 if (work_busy(&acpi_desc
->work
))
2575 int acpi_nfit_ars_rescan(struct acpi_nfit_desc
*acpi_desc
)
2577 struct device
*dev
= acpi_desc
->dev
;
2578 struct nfit_spa
*nfit_spa
;
2580 if (work_busy(&acpi_desc
->work
))
2583 if (acpi_desc
->cancel
)
2586 mutex_lock(&acpi_desc
->init_mutex
);
2587 list_for_each_entry(nfit_spa
, &acpi_desc
->spas
, list
) {
2588 struct acpi_nfit_system_address
*spa
= nfit_spa
->spa
;
2590 if (nfit_spa_type(spa
) != NFIT_SPA_PM
)
2593 nfit_spa
->ars_required
= 1;
2595 queue_work(nfit_wq
, &acpi_desc
->work
);
2596 dev_dbg(dev
, "%s: ars_scan triggered\n", __func__
);
2597 mutex_unlock(&acpi_desc
->init_mutex
);
2602 void acpi_nfit_desc_init(struct acpi_nfit_desc
*acpi_desc
, struct device
*dev
)
2604 struct nvdimm_bus_descriptor
*nd_desc
;
2606 dev_set_drvdata(dev
, acpi_desc
);
2607 acpi_desc
->dev
= dev
;
2608 acpi_desc
->blk_do_io
= acpi_nfit_blk_region_do_io
;
2609 nd_desc
= &acpi_desc
->nd_desc
;
2610 nd_desc
->provider_name
= "ACPI.NFIT";
2611 nd_desc
->module
= THIS_MODULE
;
2612 nd_desc
->ndctl
= acpi_nfit_ctl
;
2613 nd_desc
->flush_probe
= acpi_nfit_flush_probe
;
2614 nd_desc
->clear_to_send
= acpi_nfit_clear_to_send
;
2615 nd_desc
->attr_groups
= acpi_nfit_attribute_groups
;
2617 INIT_LIST_HEAD(&acpi_desc
->spas
);
2618 INIT_LIST_HEAD(&acpi_desc
->dcrs
);
2619 INIT_LIST_HEAD(&acpi_desc
->bdws
);
2620 INIT_LIST_HEAD(&acpi_desc
->idts
);
2621 INIT_LIST_HEAD(&acpi_desc
->flushes
);
2622 INIT_LIST_HEAD(&acpi_desc
->memdevs
);
2623 INIT_LIST_HEAD(&acpi_desc
->dimms
);
2624 INIT_LIST_HEAD(&acpi_desc
->list
);
2625 mutex_init(&acpi_desc
->init_mutex
);
2626 INIT_WORK(&acpi_desc
->work
, acpi_nfit_scrub
);
2628 EXPORT_SYMBOL_GPL(acpi_nfit_desc_init
);
2630 static int acpi_nfit_add(struct acpi_device
*adev
)
2632 struct acpi_buffer buf
= { ACPI_ALLOCATE_BUFFER
, NULL
};
2633 struct acpi_nfit_desc
*acpi_desc
;
2634 struct device
*dev
= &adev
->dev
;
2635 struct acpi_table_header
*tbl
;
2636 acpi_status status
= AE_OK
;
2640 status
= acpi_get_table_with_size(ACPI_SIG_NFIT
, 0, &tbl
, &sz
);
2641 if (ACPI_FAILURE(status
)) {
2642 /* This is ok, we could have an nvdimm hotplugged later */
2643 dev_dbg(dev
, "failed to find NFIT at startup\n");
2647 acpi_desc
= devm_kzalloc(dev
, sizeof(*acpi_desc
), GFP_KERNEL
);
2650 acpi_nfit_desc_init(acpi_desc
, &adev
->dev
);
2652 /* Save the acpi header for exporting the revision via sysfs */
2653 acpi_desc
->acpi_header
= *tbl
;
2655 /* Evaluate _FIT and override with that if present */
2656 status
= acpi_evaluate_object(adev
->handle
, "_FIT", NULL
, &buf
);
2657 if (ACPI_SUCCESS(status
) && buf
.length
> 0) {
2658 union acpi_object
*obj
= buf
.pointer
;
2660 if (obj
->type
== ACPI_TYPE_BUFFER
)
2661 rc
= acpi_nfit_init(acpi_desc
, obj
->buffer
.pointer
,
2662 obj
->buffer
.length
);
2664 dev_dbg(dev
, "%s invalid type %d, ignoring _FIT\n",
2665 __func__
, (int) obj
->type
);
2668 /* skip over the lead-in header table */
2669 rc
= acpi_nfit_init(acpi_desc
, (void *) tbl
2670 + sizeof(struct acpi_table_nfit
),
2671 sz
- sizeof(struct acpi_table_nfit
));
2675 static int acpi_nfit_remove(struct acpi_device
*adev
)
2677 /* see acpi_nfit_destruct */
2681 static void acpi_nfit_notify(struct acpi_device
*adev
, u32 event
)
2683 struct acpi_nfit_desc
*acpi_desc
= dev_get_drvdata(&adev
->dev
);
2684 struct acpi_buffer buf
= { ACPI_ALLOCATE_BUFFER
, NULL
};
2685 struct device
*dev
= &adev
->dev
;
2686 union acpi_object
*obj
;
2690 dev_dbg(dev
, "%s: event: %d\n", __func__
, event
);
2694 /* dev->driver may be null if we're being removed */
2695 dev_dbg(dev
, "%s: no driver found for dev\n", __func__
);
2700 acpi_desc
= devm_kzalloc(dev
, sizeof(*acpi_desc
), GFP_KERNEL
);
2703 acpi_nfit_desc_init(acpi_desc
, &adev
->dev
);
2706 * Finish previous registration before considering new
2709 flush_workqueue(nfit_wq
);
2713 status
= acpi_evaluate_object(adev
->handle
, "_FIT", NULL
, &buf
);
2714 if (ACPI_FAILURE(status
)) {
2715 dev_err(dev
, "failed to evaluate _FIT\n");
2720 if (obj
->type
== ACPI_TYPE_BUFFER
) {
2721 ret
= acpi_nfit_init(acpi_desc
, obj
->buffer
.pointer
,
2722 obj
->buffer
.length
);
2724 dev_err(dev
, "failed to merge updated NFIT\n");
2726 dev_err(dev
, "Invalid _FIT\n");
2733 static const struct acpi_device_id acpi_nfit_ids
[] = {
2737 MODULE_DEVICE_TABLE(acpi
, acpi_nfit_ids
);
2739 static struct acpi_driver acpi_nfit_driver
= {
2740 .name
= KBUILD_MODNAME
,
2741 .ids
= acpi_nfit_ids
,
2743 .add
= acpi_nfit_add
,
2744 .remove
= acpi_nfit_remove
,
2745 .notify
= acpi_nfit_notify
,
2749 static __init
int nfit_init(void)
2751 BUILD_BUG_ON(sizeof(struct acpi_table_nfit
) != 40);
2752 BUILD_BUG_ON(sizeof(struct acpi_nfit_system_address
) != 56);
2753 BUILD_BUG_ON(sizeof(struct acpi_nfit_memory_map
) != 48);
2754 BUILD_BUG_ON(sizeof(struct acpi_nfit_interleave
) != 20);
2755 BUILD_BUG_ON(sizeof(struct acpi_nfit_smbios
) != 9);
2756 BUILD_BUG_ON(sizeof(struct acpi_nfit_control_region
) != 80);
2757 BUILD_BUG_ON(sizeof(struct acpi_nfit_data_region
) != 40);
2759 acpi_str_to_uuid(UUID_VOLATILE_MEMORY
, nfit_uuid
[NFIT_SPA_VOLATILE
]);
2760 acpi_str_to_uuid(UUID_PERSISTENT_MEMORY
, nfit_uuid
[NFIT_SPA_PM
]);
2761 acpi_str_to_uuid(UUID_CONTROL_REGION
, nfit_uuid
[NFIT_SPA_DCR
]);
2762 acpi_str_to_uuid(UUID_DATA_REGION
, nfit_uuid
[NFIT_SPA_BDW
]);
2763 acpi_str_to_uuid(UUID_VOLATILE_VIRTUAL_DISK
, nfit_uuid
[NFIT_SPA_VDISK
]);
2764 acpi_str_to_uuid(UUID_VOLATILE_VIRTUAL_CD
, nfit_uuid
[NFIT_SPA_VCD
]);
2765 acpi_str_to_uuid(UUID_PERSISTENT_VIRTUAL_DISK
, nfit_uuid
[NFIT_SPA_PDISK
]);
2766 acpi_str_to_uuid(UUID_PERSISTENT_VIRTUAL_CD
, nfit_uuid
[NFIT_SPA_PCD
]);
2767 acpi_str_to_uuid(UUID_NFIT_BUS
, nfit_uuid
[NFIT_DEV_BUS
]);
2768 acpi_str_to_uuid(UUID_NFIT_DIMM
, nfit_uuid
[NFIT_DEV_DIMM
]);
2769 acpi_str_to_uuid(UUID_NFIT_DIMM_N_HPE1
, nfit_uuid
[NFIT_DEV_DIMM_N_HPE1
]);
2770 acpi_str_to_uuid(UUID_NFIT_DIMM_N_HPE2
, nfit_uuid
[NFIT_DEV_DIMM_N_HPE2
]);
2771 acpi_str_to_uuid(UUID_NFIT_DIMM_N_MSFT
, nfit_uuid
[NFIT_DEV_DIMM_N_MSFT
]);
2773 nfit_wq
= create_singlethread_workqueue("nfit");
2777 nfit_mce_register();
2779 return acpi_bus_register_driver(&acpi_nfit_driver
);
2782 static __exit
void nfit_exit(void)
2784 nfit_mce_unregister();
2785 acpi_bus_unregister_driver(&acpi_nfit_driver
);
2786 destroy_workqueue(nfit_wq
);
2787 WARN_ON(!list_empty(&acpi_descs
));
2790 module_init(nfit_init
);
2791 module_exit(nfit_exit
);
2792 MODULE_LICENSE("GPL v2");
2793 MODULE_AUTHOR("Intel Corporation");