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/list.h>
19 #include <linux/acpi.h>
20 #include <linux/sort.h>
21 #include <linux/pmem.h>
26 * For readq() and writeq() on 32-bit builds, the hi-lo, lo-hi order is
29 #include <asm-generic/io-64-nonatomic-hi-lo.h>
31 static bool force_enable_dimms
;
32 module_param(force_enable_dimms
, bool, S_IRUGO
|S_IWUSR
);
33 MODULE_PARM_DESC(force_enable_dimms
, "Ignore _STA (ACPI DIMM device) status");
35 static u8 nfit_uuid
[NFIT_UUID_MAX
][16];
37 const u8
*to_nfit_uuid(enum nfit_uuids id
)
41 EXPORT_SYMBOL(to_nfit_uuid
);
43 static struct acpi_nfit_desc
*to_acpi_nfit_desc(
44 struct nvdimm_bus_descriptor
*nd_desc
)
46 return container_of(nd_desc
, struct acpi_nfit_desc
, nd_desc
);
49 static struct acpi_device
*to_acpi_dev(struct acpi_nfit_desc
*acpi_desc
)
51 struct nvdimm_bus_descriptor
*nd_desc
= &acpi_desc
->nd_desc
;
54 * If provider == 'ACPI.NFIT' we can assume 'dev' is a struct
57 if (!nd_desc
->provider_name
58 || strcmp(nd_desc
->provider_name
, "ACPI.NFIT") != 0)
61 return to_acpi_device(acpi_desc
->dev
);
64 static int acpi_nfit_ctl(struct nvdimm_bus_descriptor
*nd_desc
,
65 struct nvdimm
*nvdimm
, unsigned int cmd
, void *buf
,
68 struct acpi_nfit_desc
*acpi_desc
= to_acpi_nfit_desc(nd_desc
);
69 const struct nd_cmd_desc
*desc
= NULL
;
70 union acpi_object in_obj
, in_buf
, *out_obj
;
71 struct device
*dev
= acpi_desc
->dev
;
72 const char *cmd_name
, *dimm_name
;
73 unsigned long dsm_mask
;
80 struct nfit_mem
*nfit_mem
= nvdimm_provider_data(nvdimm
);
81 struct acpi_device
*adev
= nfit_mem
->adev
;
85 dimm_name
= nvdimm_name(nvdimm
);
86 cmd_name
= nvdimm_cmd_name(cmd
);
87 dsm_mask
= nfit_mem
->dsm_mask
;
88 desc
= nd_cmd_dimm_desc(cmd
);
89 uuid
= to_nfit_uuid(NFIT_DEV_DIMM
);
90 handle
= adev
->handle
;
92 struct acpi_device
*adev
= to_acpi_dev(acpi_desc
);
94 cmd_name
= nvdimm_bus_cmd_name(cmd
);
95 dsm_mask
= nd_desc
->dsm_mask
;
96 desc
= nd_cmd_bus_desc(cmd
);
97 uuid
= to_nfit_uuid(NFIT_DEV_BUS
);
98 handle
= adev
->handle
;
102 if (!desc
|| (cmd
&& (desc
->out_num
+ desc
->in_num
== 0)))
105 if (!test_bit(cmd
, &dsm_mask
))
108 in_obj
.type
= ACPI_TYPE_PACKAGE
;
109 in_obj
.package
.count
= 1;
110 in_obj
.package
.elements
= &in_buf
;
111 in_buf
.type
= ACPI_TYPE_BUFFER
;
112 in_buf
.buffer
.pointer
= buf
;
113 in_buf
.buffer
.length
= 0;
115 /* libnvdimm has already validated the input envelope */
116 for (i
= 0; i
< desc
->in_num
; i
++)
117 in_buf
.buffer
.length
+= nd_cmd_in_size(nvdimm
, cmd
, desc
,
120 if (IS_ENABLED(CONFIG_ACPI_NFIT_DEBUG
)) {
121 dev_dbg(dev
, "%s:%s cmd: %s input length: %d\n", __func__
,
122 dimm_name
, cmd_name
, in_buf
.buffer
.length
);
123 print_hex_dump_debug(cmd_name
, DUMP_PREFIX_OFFSET
, 4,
124 4, in_buf
.buffer
.pointer
, min_t(u32
, 128,
125 in_buf
.buffer
.length
), true);
128 out_obj
= acpi_evaluate_dsm(handle
, uuid
, 1, cmd
, &in_obj
);
130 dev_dbg(dev
, "%s:%s _DSM failed cmd: %s\n", __func__
, dimm_name
,
135 if (out_obj
->package
.type
!= ACPI_TYPE_BUFFER
) {
136 dev_dbg(dev
, "%s:%s unexpected output object type cmd: %s type: %d\n",
137 __func__
, dimm_name
, cmd_name
, out_obj
->type
);
142 if (IS_ENABLED(CONFIG_ACPI_NFIT_DEBUG
)) {
143 dev_dbg(dev
, "%s:%s cmd: %s output length: %d\n", __func__
,
144 dimm_name
, cmd_name
, out_obj
->buffer
.length
);
145 print_hex_dump_debug(cmd_name
, DUMP_PREFIX_OFFSET
, 4,
146 4, out_obj
->buffer
.pointer
, min_t(u32
, 128,
147 out_obj
->buffer
.length
), true);
150 for (i
= 0, offset
= 0; i
< desc
->out_num
; i
++) {
151 u32 out_size
= nd_cmd_out_size(nvdimm
, cmd
, desc
, i
, buf
,
152 (u32
*) out_obj
->buffer
.pointer
);
154 if (offset
+ out_size
> out_obj
->buffer
.length
) {
155 dev_dbg(dev
, "%s:%s output object underflow cmd: %s field: %d\n",
156 __func__
, dimm_name
, cmd_name
, i
);
160 if (in_buf
.buffer
.length
+ offset
+ out_size
> buf_len
) {
161 dev_dbg(dev
, "%s:%s output overrun cmd: %s field: %d\n",
162 __func__
, dimm_name
, cmd_name
, i
);
166 memcpy(buf
+ in_buf
.buffer
.length
+ offset
,
167 out_obj
->buffer
.pointer
+ offset
, out_size
);
170 if (offset
+ in_buf
.buffer
.length
< buf_len
) {
173 * status valid, return the number of bytes left
174 * unfilled in the output buffer
176 rc
= buf_len
- offset
- in_buf
.buffer
.length
;
178 dev_err(dev
, "%s:%s underrun cmd: %s buf_len: %d out_len: %d\n",
179 __func__
, dimm_name
, cmd_name
, buf_len
,
192 static const char *spa_type_name(u16 type
)
194 static const char *to_name
[] = {
195 [NFIT_SPA_VOLATILE
] = "volatile",
196 [NFIT_SPA_PM
] = "pmem",
197 [NFIT_SPA_DCR
] = "dimm-control-region",
198 [NFIT_SPA_BDW
] = "block-data-window",
199 [NFIT_SPA_VDISK
] = "volatile-disk",
200 [NFIT_SPA_VCD
] = "volatile-cd",
201 [NFIT_SPA_PDISK
] = "persistent-disk",
202 [NFIT_SPA_PCD
] = "persistent-cd",
206 if (type
> NFIT_SPA_PCD
)
209 return to_name
[type
];
212 static int nfit_spa_type(struct acpi_nfit_system_address
*spa
)
216 for (i
= 0; i
< NFIT_UUID_MAX
; i
++)
217 if (memcmp(to_nfit_uuid(i
), spa
->range_guid
, 16) == 0)
222 static bool add_spa(struct acpi_nfit_desc
*acpi_desc
,
223 struct acpi_nfit_system_address
*spa
)
225 struct device
*dev
= acpi_desc
->dev
;
226 struct nfit_spa
*nfit_spa
= devm_kzalloc(dev
, sizeof(*nfit_spa
),
231 INIT_LIST_HEAD(&nfit_spa
->list
);
233 list_add_tail(&nfit_spa
->list
, &acpi_desc
->spas
);
234 dev_dbg(dev
, "%s: spa index: %d type: %s\n", __func__
,
236 spa_type_name(nfit_spa_type(spa
)));
240 static bool add_memdev(struct acpi_nfit_desc
*acpi_desc
,
241 struct acpi_nfit_memory_map
*memdev
)
243 struct device
*dev
= acpi_desc
->dev
;
244 struct nfit_memdev
*nfit_memdev
= devm_kzalloc(dev
,
245 sizeof(*nfit_memdev
), GFP_KERNEL
);
249 INIT_LIST_HEAD(&nfit_memdev
->list
);
250 nfit_memdev
->memdev
= memdev
;
251 list_add_tail(&nfit_memdev
->list
, &acpi_desc
->memdevs
);
252 dev_dbg(dev
, "%s: memdev handle: %#x spa: %d dcr: %d\n",
253 __func__
, memdev
->device_handle
, memdev
->range_index
,
254 memdev
->region_index
);
258 static bool add_dcr(struct acpi_nfit_desc
*acpi_desc
,
259 struct acpi_nfit_control_region
*dcr
)
261 struct device
*dev
= acpi_desc
->dev
;
262 struct nfit_dcr
*nfit_dcr
= devm_kzalloc(dev
, sizeof(*nfit_dcr
),
267 INIT_LIST_HEAD(&nfit_dcr
->list
);
269 list_add_tail(&nfit_dcr
->list
, &acpi_desc
->dcrs
);
270 dev_dbg(dev
, "%s: dcr index: %d windows: %d\n", __func__
,
271 dcr
->region_index
, dcr
->windows
);
275 static bool add_bdw(struct acpi_nfit_desc
*acpi_desc
,
276 struct acpi_nfit_data_region
*bdw
)
278 struct device
*dev
= acpi_desc
->dev
;
279 struct nfit_bdw
*nfit_bdw
= devm_kzalloc(dev
, sizeof(*nfit_bdw
),
284 INIT_LIST_HEAD(&nfit_bdw
->list
);
286 list_add_tail(&nfit_bdw
->list
, &acpi_desc
->bdws
);
287 dev_dbg(dev
, "%s: bdw dcr: %d windows: %d\n", __func__
,
288 bdw
->region_index
, bdw
->windows
);
292 static bool add_idt(struct acpi_nfit_desc
*acpi_desc
,
293 struct acpi_nfit_interleave
*idt
)
295 struct device
*dev
= acpi_desc
->dev
;
296 struct nfit_idt
*nfit_idt
= devm_kzalloc(dev
, sizeof(*nfit_idt
),
301 INIT_LIST_HEAD(&nfit_idt
->list
);
303 list_add_tail(&nfit_idt
->list
, &acpi_desc
->idts
);
304 dev_dbg(dev
, "%s: idt index: %d num_lines: %d\n", __func__
,
305 idt
->interleave_index
, idt
->line_count
);
309 static bool add_flush(struct acpi_nfit_desc
*acpi_desc
,
310 struct acpi_nfit_flush_address
*flush
)
312 struct device
*dev
= acpi_desc
->dev
;
313 struct nfit_flush
*nfit_flush
= devm_kzalloc(dev
, sizeof(*nfit_flush
),
318 INIT_LIST_HEAD(&nfit_flush
->list
);
319 nfit_flush
->flush
= flush
;
320 list_add_tail(&nfit_flush
->list
, &acpi_desc
->flushes
);
321 dev_dbg(dev
, "%s: nfit_flush handle: %d hint_count: %d\n", __func__
,
322 flush
->device_handle
, flush
->hint_count
);
326 static void *add_table(struct acpi_nfit_desc
*acpi_desc
, void *table
,
329 struct device
*dev
= acpi_desc
->dev
;
330 struct acpi_nfit_header
*hdr
;
331 void *err
= ERR_PTR(-ENOMEM
);
338 case ACPI_NFIT_TYPE_SYSTEM_ADDRESS
:
339 if (!add_spa(acpi_desc
, table
))
342 case ACPI_NFIT_TYPE_MEMORY_MAP
:
343 if (!add_memdev(acpi_desc
, table
))
346 case ACPI_NFIT_TYPE_CONTROL_REGION
:
347 if (!add_dcr(acpi_desc
, table
))
350 case ACPI_NFIT_TYPE_DATA_REGION
:
351 if (!add_bdw(acpi_desc
, table
))
354 case ACPI_NFIT_TYPE_INTERLEAVE
:
355 if (!add_idt(acpi_desc
, table
))
358 case ACPI_NFIT_TYPE_FLUSH_ADDRESS
:
359 if (!add_flush(acpi_desc
, table
))
362 case ACPI_NFIT_TYPE_SMBIOS
:
363 dev_dbg(dev
, "%s: smbios\n", __func__
);
366 dev_err(dev
, "unknown table '%d' parsing nfit\n", hdr
->type
);
370 return table
+ hdr
->length
;
373 static void nfit_mem_find_spa_bdw(struct acpi_nfit_desc
*acpi_desc
,
374 struct nfit_mem
*nfit_mem
)
376 u32 device_handle
= __to_nfit_memdev(nfit_mem
)->device_handle
;
377 u16 dcr
= nfit_mem
->dcr
->region_index
;
378 struct nfit_spa
*nfit_spa
;
380 list_for_each_entry(nfit_spa
, &acpi_desc
->spas
, list
) {
381 u16 range_index
= nfit_spa
->spa
->range_index
;
382 int type
= nfit_spa_type(nfit_spa
->spa
);
383 struct nfit_memdev
*nfit_memdev
;
385 if (type
!= NFIT_SPA_BDW
)
388 list_for_each_entry(nfit_memdev
, &acpi_desc
->memdevs
, list
) {
389 if (nfit_memdev
->memdev
->range_index
!= range_index
)
391 if (nfit_memdev
->memdev
->device_handle
!= device_handle
)
393 if (nfit_memdev
->memdev
->region_index
!= dcr
)
396 nfit_mem
->spa_bdw
= nfit_spa
->spa
;
401 dev_dbg(acpi_desc
->dev
, "SPA-BDW not found for SPA-DCR %d\n",
402 nfit_mem
->spa_dcr
->range_index
);
403 nfit_mem
->bdw
= NULL
;
406 static int nfit_mem_add(struct acpi_nfit_desc
*acpi_desc
,
407 struct nfit_mem
*nfit_mem
, struct acpi_nfit_system_address
*spa
)
409 u16 dcr
= __to_nfit_memdev(nfit_mem
)->region_index
;
410 struct nfit_memdev
*nfit_memdev
;
411 struct nfit_flush
*nfit_flush
;
412 struct nfit_dcr
*nfit_dcr
;
413 struct nfit_bdw
*nfit_bdw
;
414 struct nfit_idt
*nfit_idt
;
415 u16 idt_idx
, range_index
;
417 list_for_each_entry(nfit_dcr
, &acpi_desc
->dcrs
, list
) {
418 if (nfit_dcr
->dcr
->region_index
!= dcr
)
420 nfit_mem
->dcr
= nfit_dcr
->dcr
;
424 if (!nfit_mem
->dcr
) {
425 dev_dbg(acpi_desc
->dev
, "SPA %d missing:%s%s\n",
426 spa
->range_index
, __to_nfit_memdev(nfit_mem
)
427 ? "" : " MEMDEV", nfit_mem
->dcr
? "" : " DCR");
432 * We've found enough to create an nvdimm, optionally
433 * find an associated BDW
435 list_add(&nfit_mem
->list
, &acpi_desc
->dimms
);
437 list_for_each_entry(nfit_bdw
, &acpi_desc
->bdws
, list
) {
438 if (nfit_bdw
->bdw
->region_index
!= dcr
)
440 nfit_mem
->bdw
= nfit_bdw
->bdw
;
447 nfit_mem_find_spa_bdw(acpi_desc
, nfit_mem
);
449 if (!nfit_mem
->spa_bdw
)
452 range_index
= nfit_mem
->spa_bdw
->range_index
;
453 list_for_each_entry(nfit_memdev
, &acpi_desc
->memdevs
, list
) {
454 if (nfit_memdev
->memdev
->range_index
!= range_index
||
455 nfit_memdev
->memdev
->region_index
!= dcr
)
457 nfit_mem
->memdev_bdw
= nfit_memdev
->memdev
;
458 idt_idx
= nfit_memdev
->memdev
->interleave_index
;
459 list_for_each_entry(nfit_idt
, &acpi_desc
->idts
, list
) {
460 if (nfit_idt
->idt
->interleave_index
!= idt_idx
)
462 nfit_mem
->idt_bdw
= nfit_idt
->idt
;
466 list_for_each_entry(nfit_flush
, &acpi_desc
->flushes
, list
) {
467 if (nfit_flush
->flush
->device_handle
!=
468 nfit_memdev
->memdev
->device_handle
)
470 nfit_mem
->nfit_flush
= nfit_flush
;
479 static int nfit_mem_dcr_init(struct acpi_nfit_desc
*acpi_desc
,
480 struct acpi_nfit_system_address
*spa
)
482 struct nfit_mem
*nfit_mem
, *found
;
483 struct nfit_memdev
*nfit_memdev
;
484 int type
= nfit_spa_type(spa
);
495 list_for_each_entry(nfit_memdev
, &acpi_desc
->memdevs
, list
) {
498 if (nfit_memdev
->memdev
->range_index
!= spa
->range_index
)
501 dcr
= nfit_memdev
->memdev
->region_index
;
502 list_for_each_entry(nfit_mem
, &acpi_desc
->dimms
, list
)
503 if (__to_nfit_memdev(nfit_mem
)->region_index
== dcr
) {
511 nfit_mem
= devm_kzalloc(acpi_desc
->dev
,
512 sizeof(*nfit_mem
), GFP_KERNEL
);
515 INIT_LIST_HEAD(&nfit_mem
->list
);
518 if (type
== NFIT_SPA_DCR
) {
519 struct nfit_idt
*nfit_idt
;
522 /* multiple dimms may share a SPA when interleaved */
523 nfit_mem
->spa_dcr
= spa
;
524 nfit_mem
->memdev_dcr
= nfit_memdev
->memdev
;
525 idt_idx
= nfit_memdev
->memdev
->interleave_index
;
526 list_for_each_entry(nfit_idt
, &acpi_desc
->idts
, list
) {
527 if (nfit_idt
->idt
->interleave_index
!= idt_idx
)
529 nfit_mem
->idt_dcr
= nfit_idt
->idt
;
534 * A single dimm may belong to multiple SPA-PM
535 * ranges, record at least one in addition to
538 nfit_mem
->memdev_pmem
= nfit_memdev
->memdev
;
544 rc
= nfit_mem_add(acpi_desc
, nfit_mem
, spa
);
552 static int nfit_mem_cmp(void *priv
, struct list_head
*_a
, struct list_head
*_b
)
554 struct nfit_mem
*a
= container_of(_a
, typeof(*a
), list
);
555 struct nfit_mem
*b
= container_of(_b
, typeof(*b
), list
);
556 u32 handleA
, handleB
;
558 handleA
= __to_nfit_memdev(a
)->device_handle
;
559 handleB
= __to_nfit_memdev(b
)->device_handle
;
560 if (handleA
< handleB
)
562 else if (handleA
> handleB
)
567 static int nfit_mem_init(struct acpi_nfit_desc
*acpi_desc
)
569 struct nfit_spa
*nfit_spa
;
572 * For each SPA-DCR or SPA-PMEM address range find its
573 * corresponding MEMDEV(s). From each MEMDEV find the
574 * corresponding DCR. Then, if we're operating on a SPA-DCR,
575 * try to find a SPA-BDW and a corresponding BDW that references
576 * the DCR. Throw it all into an nfit_mem object. Note, that
579 list_for_each_entry(nfit_spa
, &acpi_desc
->spas
, list
) {
582 rc
= nfit_mem_dcr_init(acpi_desc
, nfit_spa
->spa
);
587 list_sort(NULL
, &acpi_desc
->dimms
, nfit_mem_cmp
);
592 static ssize_t
revision_show(struct device
*dev
,
593 struct device_attribute
*attr
, char *buf
)
595 struct nvdimm_bus
*nvdimm_bus
= to_nvdimm_bus(dev
);
596 struct nvdimm_bus_descriptor
*nd_desc
= to_nd_desc(nvdimm_bus
);
597 struct acpi_nfit_desc
*acpi_desc
= to_acpi_desc(nd_desc
);
599 return sprintf(buf
, "%d\n", acpi_desc
->nfit
->header
.revision
);
601 static DEVICE_ATTR_RO(revision
);
603 static struct attribute
*acpi_nfit_attributes
[] = {
604 &dev_attr_revision
.attr
,
608 static struct attribute_group acpi_nfit_attribute_group
= {
610 .attrs
= acpi_nfit_attributes
,
613 const struct attribute_group
*acpi_nfit_attribute_groups
[] = {
614 &nvdimm_bus_attribute_group
,
615 &acpi_nfit_attribute_group
,
618 EXPORT_SYMBOL_GPL(acpi_nfit_attribute_groups
);
620 static struct acpi_nfit_memory_map
*to_nfit_memdev(struct device
*dev
)
622 struct nvdimm
*nvdimm
= to_nvdimm(dev
);
623 struct nfit_mem
*nfit_mem
= nvdimm_provider_data(nvdimm
);
625 return __to_nfit_memdev(nfit_mem
);
628 static struct acpi_nfit_control_region
*to_nfit_dcr(struct device
*dev
)
630 struct nvdimm
*nvdimm
= to_nvdimm(dev
);
631 struct nfit_mem
*nfit_mem
= nvdimm_provider_data(nvdimm
);
633 return nfit_mem
->dcr
;
636 static ssize_t
handle_show(struct device
*dev
,
637 struct device_attribute
*attr
, char *buf
)
639 struct acpi_nfit_memory_map
*memdev
= to_nfit_memdev(dev
);
641 return sprintf(buf
, "%#x\n", memdev
->device_handle
);
643 static DEVICE_ATTR_RO(handle
);
645 static ssize_t
phys_id_show(struct device
*dev
,
646 struct device_attribute
*attr
, char *buf
)
648 struct acpi_nfit_memory_map
*memdev
= to_nfit_memdev(dev
);
650 return sprintf(buf
, "%#x\n", memdev
->physical_id
);
652 static DEVICE_ATTR_RO(phys_id
);
654 static ssize_t
vendor_show(struct device
*dev
,
655 struct device_attribute
*attr
, char *buf
)
657 struct acpi_nfit_control_region
*dcr
= to_nfit_dcr(dev
);
659 return sprintf(buf
, "%#x\n", dcr
->vendor_id
);
661 static DEVICE_ATTR_RO(vendor
);
663 static ssize_t
rev_id_show(struct device
*dev
,
664 struct device_attribute
*attr
, char *buf
)
666 struct acpi_nfit_control_region
*dcr
= to_nfit_dcr(dev
);
668 return sprintf(buf
, "%#x\n", dcr
->revision_id
);
670 static DEVICE_ATTR_RO(rev_id
);
672 static ssize_t
device_show(struct device
*dev
,
673 struct device_attribute
*attr
, char *buf
)
675 struct acpi_nfit_control_region
*dcr
= to_nfit_dcr(dev
);
677 return sprintf(buf
, "%#x\n", dcr
->device_id
);
679 static DEVICE_ATTR_RO(device
);
681 static ssize_t
format_show(struct device
*dev
,
682 struct device_attribute
*attr
, char *buf
)
684 struct acpi_nfit_control_region
*dcr
= to_nfit_dcr(dev
);
686 return sprintf(buf
, "%#x\n", dcr
->code
);
688 static DEVICE_ATTR_RO(format
);
690 static ssize_t
serial_show(struct device
*dev
,
691 struct device_attribute
*attr
, char *buf
)
693 struct acpi_nfit_control_region
*dcr
= to_nfit_dcr(dev
);
695 return sprintf(buf
, "%#x\n", dcr
->serial_number
);
697 static DEVICE_ATTR_RO(serial
);
699 static ssize_t
flags_show(struct device
*dev
,
700 struct device_attribute
*attr
, char *buf
)
702 u16 flags
= to_nfit_memdev(dev
)->flags
;
704 return sprintf(buf
, "%s%s%s%s%s\n",
705 flags
& ACPI_NFIT_MEM_SAVE_FAILED
? "save_fail " : "",
706 flags
& ACPI_NFIT_MEM_RESTORE_FAILED
? "restore_fail " : "",
707 flags
& ACPI_NFIT_MEM_FLUSH_FAILED
? "flush_fail " : "",
708 flags
& ACPI_NFIT_MEM_ARMED
? "not_armed " : "",
709 flags
& ACPI_NFIT_MEM_HEALTH_OBSERVED
? "smart_event " : "");
711 static DEVICE_ATTR_RO(flags
);
713 static struct attribute
*acpi_nfit_dimm_attributes
[] = {
714 &dev_attr_handle
.attr
,
715 &dev_attr_phys_id
.attr
,
716 &dev_attr_vendor
.attr
,
717 &dev_attr_device
.attr
,
718 &dev_attr_format
.attr
,
719 &dev_attr_serial
.attr
,
720 &dev_attr_rev_id
.attr
,
721 &dev_attr_flags
.attr
,
725 static umode_t
acpi_nfit_dimm_attr_visible(struct kobject
*kobj
,
726 struct attribute
*a
, int n
)
728 struct device
*dev
= container_of(kobj
, struct device
, kobj
);
730 if (to_nfit_dcr(dev
))
736 static struct attribute_group acpi_nfit_dimm_attribute_group
= {
738 .attrs
= acpi_nfit_dimm_attributes
,
739 .is_visible
= acpi_nfit_dimm_attr_visible
,
742 static const struct attribute_group
*acpi_nfit_dimm_attribute_groups
[] = {
743 &nvdimm_attribute_group
,
744 &nd_device_attribute_group
,
745 &acpi_nfit_dimm_attribute_group
,
749 static struct nvdimm
*acpi_nfit_dimm_by_handle(struct acpi_nfit_desc
*acpi_desc
,
752 struct nfit_mem
*nfit_mem
;
754 list_for_each_entry(nfit_mem
, &acpi_desc
->dimms
, list
)
755 if (__to_nfit_memdev(nfit_mem
)->device_handle
== device_handle
)
756 return nfit_mem
->nvdimm
;
761 static int acpi_nfit_add_dimm(struct acpi_nfit_desc
*acpi_desc
,
762 struct nfit_mem
*nfit_mem
, u32 device_handle
)
764 struct acpi_device
*adev
, *adev_dimm
;
765 struct device
*dev
= acpi_desc
->dev
;
766 const u8
*uuid
= to_nfit_uuid(NFIT_DEV_DIMM
);
767 unsigned long long sta
;
771 nfit_mem
->dsm_mask
= acpi_desc
->dimm_dsm_force_en
;
772 adev
= to_acpi_dev(acpi_desc
);
776 adev_dimm
= acpi_find_child_device(adev
, device_handle
, false);
777 nfit_mem
->adev
= adev_dimm
;
779 dev_err(dev
, "no ACPI.NFIT device with _ADR %#x, disabling...\n",
781 return force_enable_dimms
? 0 : -ENODEV
;
784 status
= acpi_evaluate_integer(adev_dimm
->handle
, "_STA", NULL
, &sta
);
785 if (status
== AE_NOT_FOUND
) {
786 dev_dbg(dev
, "%s missing _STA, assuming enabled...\n",
787 dev_name(&adev_dimm
->dev
));
789 } else if (ACPI_FAILURE(status
))
790 dev_err(dev
, "%s failed to retrieve_STA, disabling...\n",
791 dev_name(&adev_dimm
->dev
));
792 else if ((sta
& ACPI_STA_DEVICE_ENABLED
) == 0)
793 dev_info(dev
, "%s disabled by firmware\n",
794 dev_name(&adev_dimm
->dev
));
798 for (i
= ND_CMD_SMART
; i
<= ND_CMD_VENDOR
; i
++)
799 if (acpi_check_dsm(adev_dimm
->handle
, uuid
, 1, 1ULL << i
))
800 set_bit(i
, &nfit_mem
->dsm_mask
);
802 return force_enable_dimms
? 0 : rc
;
805 static int acpi_nfit_register_dimms(struct acpi_nfit_desc
*acpi_desc
)
807 struct nfit_mem
*nfit_mem
;
810 list_for_each_entry(nfit_mem
, &acpi_desc
->dimms
, list
) {
811 struct nvdimm
*nvdimm
;
812 unsigned long flags
= 0;
817 device_handle
= __to_nfit_memdev(nfit_mem
)->device_handle
;
818 nvdimm
= acpi_nfit_dimm_by_handle(acpi_desc
, device_handle
);
821 * If for some reason we find multiple DCRs the
824 dev_err(acpi_desc
->dev
, "duplicate DCR detected: %s\n",
825 nvdimm_name(nvdimm
));
829 if (nfit_mem
->bdw
&& nfit_mem
->memdev_pmem
)
830 flags
|= NDD_ALIASING
;
832 mem_flags
= __to_nfit_memdev(nfit_mem
)->flags
;
833 if (mem_flags
& ACPI_NFIT_MEM_ARMED
)
834 flags
|= NDD_UNARMED
;
836 rc
= acpi_nfit_add_dimm(acpi_desc
, nfit_mem
, device_handle
);
840 nvdimm
= nvdimm_create(acpi_desc
->nvdimm_bus
, nfit_mem
,
841 acpi_nfit_dimm_attribute_groups
,
842 flags
, &nfit_mem
->dsm_mask
);
846 nfit_mem
->nvdimm
= nvdimm
;
849 if ((mem_flags
& ACPI_NFIT_MEM_FAILED_MASK
) == 0)
852 dev_info(acpi_desc
->dev
, "%s flags:%s%s%s%s\n",
854 mem_flags
& ACPI_NFIT_MEM_SAVE_FAILED
? " save_fail" : "",
855 mem_flags
& ACPI_NFIT_MEM_RESTORE_FAILED
? " restore_fail":"",
856 mem_flags
& ACPI_NFIT_MEM_FLUSH_FAILED
? " flush_fail" : "",
857 mem_flags
& ACPI_NFIT_MEM_ARMED
? " not_armed" : "");
861 return nvdimm_bus_check_dimm_count(acpi_desc
->nvdimm_bus
, dimm_count
);
864 static void acpi_nfit_init_dsms(struct acpi_nfit_desc
*acpi_desc
)
866 struct nvdimm_bus_descriptor
*nd_desc
= &acpi_desc
->nd_desc
;
867 const u8
*uuid
= to_nfit_uuid(NFIT_DEV_BUS
);
868 struct acpi_device
*adev
;
871 adev
= to_acpi_dev(acpi_desc
);
875 for (i
= ND_CMD_ARS_CAP
; i
<= ND_CMD_ARS_STATUS
; i
++)
876 if (acpi_check_dsm(adev
->handle
, uuid
, 1, 1ULL << i
))
877 set_bit(i
, &nd_desc
->dsm_mask
);
880 static ssize_t
range_index_show(struct device
*dev
,
881 struct device_attribute
*attr
, char *buf
)
883 struct nd_region
*nd_region
= to_nd_region(dev
);
884 struct nfit_spa
*nfit_spa
= nd_region_provider_data(nd_region
);
886 return sprintf(buf
, "%d\n", nfit_spa
->spa
->range_index
);
888 static DEVICE_ATTR_RO(range_index
);
890 static struct attribute
*acpi_nfit_region_attributes
[] = {
891 &dev_attr_range_index
.attr
,
895 static struct attribute_group acpi_nfit_region_attribute_group
= {
897 .attrs
= acpi_nfit_region_attributes
,
900 static const struct attribute_group
*acpi_nfit_region_attribute_groups
[] = {
901 &nd_region_attribute_group
,
902 &nd_mapping_attribute_group
,
903 &nd_device_attribute_group
,
904 &nd_numa_attribute_group
,
905 &acpi_nfit_region_attribute_group
,
909 /* enough info to uniquely specify an interleave set */
910 struct nfit_set_info
{
911 struct nfit_set_info_map
{
918 static size_t sizeof_nfit_set_info(int num_mappings
)
920 return sizeof(struct nfit_set_info
)
921 + num_mappings
* sizeof(struct nfit_set_info_map
);
924 static int cmp_map(const void *m0
, const void *m1
)
926 const struct nfit_set_info_map
*map0
= m0
;
927 const struct nfit_set_info_map
*map1
= m1
;
929 return memcmp(&map0
->region_offset
, &map1
->region_offset
,
933 /* Retrieve the nth entry referencing this spa */
934 static struct acpi_nfit_memory_map
*memdev_from_spa(
935 struct acpi_nfit_desc
*acpi_desc
, u16 range_index
, int n
)
937 struct nfit_memdev
*nfit_memdev
;
939 list_for_each_entry(nfit_memdev
, &acpi_desc
->memdevs
, list
)
940 if (nfit_memdev
->memdev
->range_index
== range_index
)
942 return nfit_memdev
->memdev
;
946 static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc
*acpi_desc
,
947 struct nd_region_desc
*ndr_desc
,
948 struct acpi_nfit_system_address
*spa
)
950 int i
, spa_type
= nfit_spa_type(spa
);
951 struct device
*dev
= acpi_desc
->dev
;
952 struct nd_interleave_set
*nd_set
;
953 u16 nr
= ndr_desc
->num_mappings
;
954 struct nfit_set_info
*info
;
956 if (spa_type
== NFIT_SPA_PM
|| spa_type
== NFIT_SPA_VOLATILE
)
961 nd_set
= devm_kzalloc(dev
, sizeof(*nd_set
), GFP_KERNEL
);
965 info
= devm_kzalloc(dev
, sizeof_nfit_set_info(nr
), GFP_KERNEL
);
968 for (i
= 0; i
< nr
; i
++) {
969 struct nd_mapping
*nd_mapping
= &ndr_desc
->nd_mapping
[i
];
970 struct nfit_set_info_map
*map
= &info
->mapping
[i
];
971 struct nvdimm
*nvdimm
= nd_mapping
->nvdimm
;
972 struct nfit_mem
*nfit_mem
= nvdimm_provider_data(nvdimm
);
973 struct acpi_nfit_memory_map
*memdev
= memdev_from_spa(acpi_desc
,
974 spa
->range_index
, i
);
976 if (!memdev
|| !nfit_mem
->dcr
) {
977 dev_err(dev
, "%s: failed to find DCR\n", __func__
);
981 map
->region_offset
= memdev
->region_offset
;
982 map
->serial_number
= nfit_mem
->dcr
->serial_number
;
985 sort(&info
->mapping
[0], nr
, sizeof(struct nfit_set_info_map
),
987 nd_set
->cookie
= nd_fletcher64(info
, sizeof_nfit_set_info(nr
), 0);
988 ndr_desc
->nd_set
= nd_set
;
989 devm_kfree(dev
, info
);
994 static u64
to_interleave_offset(u64 offset
, struct nfit_blk_mmio
*mmio
)
996 struct acpi_nfit_interleave
*idt
= mmio
->idt
;
997 u32 sub_line_offset
, line_index
, line_offset
;
998 u64 line_no
, table_skip_count
, table_offset
;
1000 line_no
= div_u64_rem(offset
, mmio
->line_size
, &sub_line_offset
);
1001 table_skip_count
= div_u64_rem(line_no
, mmio
->num_lines
, &line_index
);
1002 line_offset
= idt
->line_offset
[line_index
]
1004 table_offset
= table_skip_count
* mmio
->table_size
;
1006 return mmio
->base_offset
+ line_offset
+ table_offset
+ sub_line_offset
;
1009 static void wmb_blk(struct nfit_blk
*nfit_blk
)
1012 if (nfit_blk
->nvdimm_flush
) {
1014 * The first wmb() is needed to 'sfence' all previous writes
1015 * such that they are architecturally visible for the platform
1016 * buffer flush. Note that we've already arranged for pmem
1017 * writes to avoid the cache via arch_memcpy_to_pmem(). The
1018 * final wmb() ensures ordering for the NVDIMM flush write.
1021 writeq(1, nfit_blk
->nvdimm_flush
);
1027 static u32
read_blk_stat(struct nfit_blk
*nfit_blk
, unsigned int bw
)
1029 struct nfit_blk_mmio
*mmio
= &nfit_blk
->mmio
[DCR
];
1030 u64 offset
= nfit_blk
->stat_offset
+ mmio
->size
* bw
;
1032 if (mmio
->num_lines
)
1033 offset
= to_interleave_offset(offset
, mmio
);
1035 return readl(mmio
->base
+ offset
);
1038 static void write_blk_ctl(struct nfit_blk
*nfit_blk
, unsigned int bw
,
1039 resource_size_t dpa
, unsigned int len
, unsigned int write
)
1042 struct nfit_blk_mmio
*mmio
= &nfit_blk
->mmio
[DCR
];
1045 BCW_OFFSET_MASK
= (1ULL << 48)-1,
1047 BCW_LEN_MASK
= (1ULL << 8) - 1,
1051 cmd
= (dpa
>> L1_CACHE_SHIFT
) & BCW_OFFSET_MASK
;
1052 len
= len
>> L1_CACHE_SHIFT
;
1053 cmd
|= ((u64
) len
& BCW_LEN_MASK
) << BCW_LEN_SHIFT
;
1054 cmd
|= ((u64
) write
) << BCW_CMD_SHIFT
;
1056 offset
= nfit_blk
->cmd_offset
+ mmio
->size
* bw
;
1057 if (mmio
->num_lines
)
1058 offset
= to_interleave_offset(offset
, mmio
);
1060 writeq(cmd
, mmio
->base
+ offset
);
1063 if (nfit_blk
->dimm_flags
& ND_BLK_DCR_LATCH
)
1064 readq(mmio
->base
+ offset
);
1067 static int acpi_nfit_blk_single_io(struct nfit_blk
*nfit_blk
,
1068 resource_size_t dpa
, void *iobuf
, size_t len
, int rw
,
1071 struct nfit_blk_mmio
*mmio
= &nfit_blk
->mmio
[BDW
];
1072 unsigned int copied
= 0;
1076 base_offset
= nfit_blk
->bdw_offset
+ dpa
% L1_CACHE_BYTES
1077 + lane
* mmio
->size
;
1078 write_blk_ctl(nfit_blk
, lane
, dpa
, len
, rw
);
1083 if (mmio
->num_lines
) {
1086 offset
= to_interleave_offset(base_offset
+ copied
,
1088 div_u64_rem(offset
, mmio
->line_size
, &line_offset
);
1089 c
= min_t(size_t, len
, mmio
->line_size
- line_offset
);
1091 offset
= base_offset
+ nfit_blk
->bdw_offset
;
1096 memcpy_to_pmem(mmio
->aperture
+ offset
,
1099 memcpy_from_pmem(iobuf
+ copied
,
1100 mmio
->aperture
+ offset
, c
);
1109 rc
= read_blk_stat(nfit_blk
, lane
) ? -EIO
: 0;
1113 static int acpi_nfit_blk_region_do_io(struct nd_blk_region
*ndbr
,
1114 resource_size_t dpa
, void *iobuf
, u64 len
, int rw
)
1116 struct nfit_blk
*nfit_blk
= nd_blk_region_provider_data(ndbr
);
1117 struct nfit_blk_mmio
*mmio
= &nfit_blk
->mmio
[BDW
];
1118 struct nd_region
*nd_region
= nfit_blk
->nd_region
;
1119 unsigned int lane
, copied
= 0;
1122 lane
= nd_region_acquire_lane(nd_region
);
1124 u64 c
= min(len
, mmio
->size
);
1126 rc
= acpi_nfit_blk_single_io(nfit_blk
, dpa
+ copied
,
1127 iobuf
+ copied
, c
, rw
, lane
);
1134 nd_region_release_lane(nd_region
, lane
);
1139 static void nfit_spa_mapping_release(struct kref
*kref
)
1141 struct nfit_spa_mapping
*spa_map
= to_spa_map(kref
);
1142 struct acpi_nfit_system_address
*spa
= spa_map
->spa
;
1143 struct acpi_nfit_desc
*acpi_desc
= spa_map
->acpi_desc
;
1145 WARN_ON(!mutex_is_locked(&acpi_desc
->spa_map_mutex
));
1146 dev_dbg(acpi_desc
->dev
, "%s: SPA%d\n", __func__
, spa
->range_index
);
1147 iounmap(spa_map
->iomem
);
1148 release_mem_region(spa
->address
, spa
->length
);
1149 list_del(&spa_map
->list
);
1153 static struct nfit_spa_mapping
*find_spa_mapping(
1154 struct acpi_nfit_desc
*acpi_desc
,
1155 struct acpi_nfit_system_address
*spa
)
1157 struct nfit_spa_mapping
*spa_map
;
1159 WARN_ON(!mutex_is_locked(&acpi_desc
->spa_map_mutex
));
1160 list_for_each_entry(spa_map
, &acpi_desc
->spa_maps
, list
)
1161 if (spa_map
->spa
== spa
)
1167 static void nfit_spa_unmap(struct acpi_nfit_desc
*acpi_desc
,
1168 struct acpi_nfit_system_address
*spa
)
1170 struct nfit_spa_mapping
*spa_map
;
1172 mutex_lock(&acpi_desc
->spa_map_mutex
);
1173 spa_map
= find_spa_mapping(acpi_desc
, spa
);
1176 kref_put(&spa_map
->kref
, nfit_spa_mapping_release
);
1177 mutex_unlock(&acpi_desc
->spa_map_mutex
);
1180 static void __iomem
*__nfit_spa_map(struct acpi_nfit_desc
*acpi_desc
,
1181 struct acpi_nfit_system_address
*spa
, enum spa_map_type type
)
1183 resource_size_t start
= spa
->address
;
1184 resource_size_t n
= spa
->length
;
1185 struct nfit_spa_mapping
*spa_map
;
1186 struct resource
*res
;
1188 WARN_ON(!mutex_is_locked(&acpi_desc
->spa_map_mutex
));
1190 spa_map
= find_spa_mapping(acpi_desc
, spa
);
1192 kref_get(&spa_map
->kref
);
1193 return spa_map
->iomem
;
1196 spa_map
= kzalloc(sizeof(*spa_map
), GFP_KERNEL
);
1200 INIT_LIST_HEAD(&spa_map
->list
);
1202 kref_init(&spa_map
->kref
);
1203 spa_map
->acpi_desc
= acpi_desc
;
1205 res
= request_mem_region(start
, n
, dev_name(acpi_desc
->dev
));
1209 if (type
== SPA_MAP_APERTURE
) {
1211 * TODO: memremap_pmem() support, but that requires cache
1212 * flushing when the aperture is moved.
1214 spa_map
->iomem
= ioremap_wc(start
, n
);
1216 spa_map
->iomem
= ioremap_nocache(start
, n
);
1218 if (!spa_map
->iomem
)
1221 list_add_tail(&spa_map
->list
, &acpi_desc
->spa_maps
);
1222 return spa_map
->iomem
;
1225 release_mem_region(start
, n
);
1232 * nfit_spa_map - interleave-aware managed-mappings of acpi_nfit_system_address ranges
1233 * @nvdimm_bus: NFIT-bus that provided the spa table entry
1234 * @nfit_spa: spa table to map
1235 * @type: aperture or control region
1237 * In the case where block-data-window apertures and
1238 * dimm-control-regions are interleaved they will end up sharing a
1239 * single request_mem_region() + ioremap() for the address range. In
1240 * the style of devm nfit_spa_map() mappings are automatically dropped
1241 * when all region devices referencing the same mapping are disabled /
1244 static void __iomem
*nfit_spa_map(struct acpi_nfit_desc
*acpi_desc
,
1245 struct acpi_nfit_system_address
*spa
, enum spa_map_type type
)
1247 void __iomem
*iomem
;
1249 mutex_lock(&acpi_desc
->spa_map_mutex
);
1250 iomem
= __nfit_spa_map(acpi_desc
, spa
, type
);
1251 mutex_unlock(&acpi_desc
->spa_map_mutex
);
1256 static int nfit_blk_init_interleave(struct nfit_blk_mmio
*mmio
,
1257 struct acpi_nfit_interleave
*idt
, u16 interleave_ways
)
1260 mmio
->num_lines
= idt
->line_count
;
1261 mmio
->line_size
= idt
->line_size
;
1262 if (interleave_ways
== 0)
1264 mmio
->table_size
= mmio
->num_lines
* interleave_ways
1271 static int acpi_nfit_blk_get_flags(struct nvdimm_bus_descriptor
*nd_desc
,
1272 struct nvdimm
*nvdimm
, struct nfit_blk
*nfit_blk
)
1274 struct nd_cmd_dimm_flags flags
;
1277 memset(&flags
, 0, sizeof(flags
));
1278 rc
= nd_desc
->ndctl(nd_desc
, nvdimm
, ND_CMD_DIMM_FLAGS
, &flags
,
1281 if (rc
>= 0 && flags
.status
== 0)
1282 nfit_blk
->dimm_flags
= flags
.flags
;
1283 else if (rc
== -ENOTTY
) {
1284 /* fall back to a conservative default */
1285 nfit_blk
->dimm_flags
= ND_BLK_DCR_LATCH
;
1293 static int acpi_nfit_blk_region_enable(struct nvdimm_bus
*nvdimm_bus
,
1296 struct nvdimm_bus_descriptor
*nd_desc
= to_nd_desc(nvdimm_bus
);
1297 struct acpi_nfit_desc
*acpi_desc
= to_acpi_desc(nd_desc
);
1298 struct nd_blk_region
*ndbr
= to_nd_blk_region(dev
);
1299 struct nfit_flush
*nfit_flush
;
1300 struct nfit_blk_mmio
*mmio
;
1301 struct nfit_blk
*nfit_blk
;
1302 struct nfit_mem
*nfit_mem
;
1303 struct nvdimm
*nvdimm
;
1306 nvdimm
= nd_blk_region_to_dimm(ndbr
);
1307 nfit_mem
= nvdimm_provider_data(nvdimm
);
1308 if (!nfit_mem
|| !nfit_mem
->dcr
|| !nfit_mem
->bdw
) {
1309 dev_dbg(dev
, "%s: missing%s%s%s\n", __func__
,
1310 nfit_mem
? "" : " nfit_mem",
1311 (nfit_mem
&& nfit_mem
->dcr
) ? "" : " dcr",
1312 (nfit_mem
&& nfit_mem
->bdw
) ? "" : " bdw");
1316 nfit_blk
= devm_kzalloc(dev
, sizeof(*nfit_blk
), GFP_KERNEL
);
1319 nd_blk_region_set_provider_data(ndbr
, nfit_blk
);
1320 nfit_blk
->nd_region
= to_nd_region(dev
);
1322 /* map block aperture memory */
1323 nfit_blk
->bdw_offset
= nfit_mem
->bdw
->offset
;
1324 mmio
= &nfit_blk
->mmio
[BDW
];
1325 mmio
->base
= nfit_spa_map(acpi_desc
, nfit_mem
->spa_bdw
,
1328 dev_dbg(dev
, "%s: %s failed to map bdw\n", __func__
,
1329 nvdimm_name(nvdimm
));
1332 mmio
->size
= nfit_mem
->bdw
->size
;
1333 mmio
->base_offset
= nfit_mem
->memdev_bdw
->region_offset
;
1334 mmio
->idt
= nfit_mem
->idt_bdw
;
1335 mmio
->spa
= nfit_mem
->spa_bdw
;
1336 rc
= nfit_blk_init_interleave(mmio
, nfit_mem
->idt_bdw
,
1337 nfit_mem
->memdev_bdw
->interleave_ways
);
1339 dev_dbg(dev
, "%s: %s failed to init bdw interleave\n",
1340 __func__
, nvdimm_name(nvdimm
));
1344 /* map block control memory */
1345 nfit_blk
->cmd_offset
= nfit_mem
->dcr
->command_offset
;
1346 nfit_blk
->stat_offset
= nfit_mem
->dcr
->status_offset
;
1347 mmio
= &nfit_blk
->mmio
[DCR
];
1348 mmio
->base
= nfit_spa_map(acpi_desc
, nfit_mem
->spa_dcr
,
1351 dev_dbg(dev
, "%s: %s failed to map dcr\n", __func__
,
1352 nvdimm_name(nvdimm
));
1355 mmio
->size
= nfit_mem
->dcr
->window_size
;
1356 mmio
->base_offset
= nfit_mem
->memdev_dcr
->region_offset
;
1357 mmio
->idt
= nfit_mem
->idt_dcr
;
1358 mmio
->spa
= nfit_mem
->spa_dcr
;
1359 rc
= nfit_blk_init_interleave(mmio
, nfit_mem
->idt_dcr
,
1360 nfit_mem
->memdev_dcr
->interleave_ways
);
1362 dev_dbg(dev
, "%s: %s failed to init dcr interleave\n",
1363 __func__
, nvdimm_name(nvdimm
));
1367 rc
= acpi_nfit_blk_get_flags(nd_desc
, nvdimm
, nfit_blk
);
1369 dev_dbg(dev
, "%s: %s failed get DIMM flags\n",
1370 __func__
, nvdimm_name(nvdimm
));
1374 nfit_flush
= nfit_mem
->nfit_flush
;
1375 if (nfit_flush
&& nfit_flush
->flush
->hint_count
!= 0) {
1376 nfit_blk
->nvdimm_flush
= devm_ioremap_nocache(dev
,
1377 nfit_flush
->flush
->hint_address
[0], 8);
1378 if (!nfit_blk
->nvdimm_flush
)
1382 if (!arch_has_pmem_api() && !nfit_blk
->nvdimm_flush
)
1383 dev_warn(dev
, "unable to guarantee persistence of writes\n");
1385 if (mmio
->line_size
== 0)
1388 if ((u32
) nfit_blk
->cmd_offset
% mmio
->line_size
1389 + 8 > mmio
->line_size
) {
1390 dev_dbg(dev
, "cmd_offset crosses interleave boundary\n");
1392 } else if ((u32
) nfit_blk
->stat_offset
% mmio
->line_size
1393 + 8 > mmio
->line_size
) {
1394 dev_dbg(dev
, "stat_offset crosses interleave boundary\n");
1401 static void acpi_nfit_blk_region_disable(struct nvdimm_bus
*nvdimm_bus
,
1404 struct nvdimm_bus_descriptor
*nd_desc
= to_nd_desc(nvdimm_bus
);
1405 struct acpi_nfit_desc
*acpi_desc
= to_acpi_desc(nd_desc
);
1406 struct nd_blk_region
*ndbr
= to_nd_blk_region(dev
);
1407 struct nfit_blk
*nfit_blk
= nd_blk_region_provider_data(ndbr
);
1411 return; /* never enabled */
1413 /* auto-free BLK spa mappings */
1414 for (i
= 0; i
< 2; i
++) {
1415 struct nfit_blk_mmio
*mmio
= &nfit_blk
->mmio
[i
];
1418 nfit_spa_unmap(acpi_desc
, mmio
->spa
);
1420 nd_blk_region_set_provider_data(ndbr
, NULL
);
1421 /* devm will free nfit_blk */
1424 static int acpi_nfit_init_mapping(struct acpi_nfit_desc
*acpi_desc
,
1425 struct nd_mapping
*nd_mapping
, struct nd_region_desc
*ndr_desc
,
1426 struct acpi_nfit_memory_map
*memdev
,
1427 struct acpi_nfit_system_address
*spa
)
1429 struct nvdimm
*nvdimm
= acpi_nfit_dimm_by_handle(acpi_desc
,
1430 memdev
->device_handle
);
1431 struct nd_blk_region_desc
*ndbr_desc
;
1432 struct nfit_mem
*nfit_mem
;
1436 dev_err(acpi_desc
->dev
, "spa%d dimm: %#x not found\n",
1437 spa
->range_index
, memdev
->device_handle
);
1441 nd_mapping
->nvdimm
= nvdimm
;
1442 switch (nfit_spa_type(spa
)) {
1444 case NFIT_SPA_VOLATILE
:
1445 nd_mapping
->start
= memdev
->address
;
1446 nd_mapping
->size
= memdev
->region_size
;
1449 nfit_mem
= nvdimm_provider_data(nvdimm
);
1450 if (!nfit_mem
|| !nfit_mem
->bdw
) {
1451 dev_dbg(acpi_desc
->dev
, "spa%d %s missing bdw\n",
1452 spa
->range_index
, nvdimm_name(nvdimm
));
1454 nd_mapping
->size
= nfit_mem
->bdw
->capacity
;
1455 nd_mapping
->start
= nfit_mem
->bdw
->start_address
;
1456 ndr_desc
->num_lanes
= nfit_mem
->bdw
->windows
;
1460 ndr_desc
->nd_mapping
= nd_mapping
;
1461 ndr_desc
->num_mappings
= blk_valid
;
1462 ndbr_desc
= to_blk_region_desc(ndr_desc
);
1463 ndbr_desc
->enable
= acpi_nfit_blk_region_enable
;
1464 ndbr_desc
->disable
= acpi_nfit_blk_region_disable
;
1465 ndbr_desc
->do_io
= acpi_desc
->blk_do_io
;
1466 if (!nvdimm_blk_region_create(acpi_desc
->nvdimm_bus
, ndr_desc
))
1474 static int acpi_nfit_register_region(struct acpi_nfit_desc
*acpi_desc
,
1475 struct nfit_spa
*nfit_spa
)
1477 static struct nd_mapping nd_mappings
[ND_MAX_MAPPINGS
];
1478 struct acpi_nfit_system_address
*spa
= nfit_spa
->spa
;
1479 struct nd_blk_region_desc ndbr_desc
;
1480 struct nd_region_desc
*ndr_desc
;
1481 struct nfit_memdev
*nfit_memdev
;
1482 struct nvdimm_bus
*nvdimm_bus
;
1483 struct resource res
;
1486 if (spa
->range_index
== 0) {
1487 dev_dbg(acpi_desc
->dev
, "%s: detected invalid spa index\n",
1492 memset(&res
, 0, sizeof(res
));
1493 memset(&nd_mappings
, 0, sizeof(nd_mappings
));
1494 memset(&ndbr_desc
, 0, sizeof(ndbr_desc
));
1495 res
.start
= spa
->address
;
1496 res
.end
= res
.start
+ spa
->length
- 1;
1497 ndr_desc
= &ndbr_desc
.ndr_desc
;
1498 ndr_desc
->res
= &res
;
1499 ndr_desc
->provider_data
= nfit_spa
;
1500 ndr_desc
->attr_groups
= acpi_nfit_region_attribute_groups
;
1501 if (spa
->flags
& ACPI_NFIT_PROXIMITY_VALID
)
1502 ndr_desc
->numa_node
= acpi_map_pxm_to_online_node(
1503 spa
->proximity_domain
);
1505 ndr_desc
->numa_node
= NUMA_NO_NODE
;
1507 list_for_each_entry(nfit_memdev
, &acpi_desc
->memdevs
, list
) {
1508 struct acpi_nfit_memory_map
*memdev
= nfit_memdev
->memdev
;
1509 struct nd_mapping
*nd_mapping
;
1511 if (memdev
->range_index
!= spa
->range_index
)
1513 if (count
>= ND_MAX_MAPPINGS
) {
1514 dev_err(acpi_desc
->dev
, "spa%d exceeds max mappings %d\n",
1515 spa
->range_index
, ND_MAX_MAPPINGS
);
1518 nd_mapping
= &nd_mappings
[count
++];
1519 rc
= acpi_nfit_init_mapping(acpi_desc
, nd_mapping
, ndr_desc
,
1525 ndr_desc
->nd_mapping
= nd_mappings
;
1526 ndr_desc
->num_mappings
= count
;
1527 rc
= acpi_nfit_init_interleave_set(acpi_desc
, ndr_desc
, spa
);
1531 nvdimm_bus
= acpi_desc
->nvdimm_bus
;
1532 if (nfit_spa_type(spa
) == NFIT_SPA_PM
) {
1533 if (!nvdimm_pmem_region_create(nvdimm_bus
, ndr_desc
))
1535 } else if (nfit_spa_type(spa
) == NFIT_SPA_VOLATILE
) {
1536 if (!nvdimm_volatile_region_create(nvdimm_bus
, ndr_desc
))
1542 static int acpi_nfit_register_regions(struct acpi_nfit_desc
*acpi_desc
)
1544 struct nfit_spa
*nfit_spa
;
1546 list_for_each_entry(nfit_spa
, &acpi_desc
->spas
, list
) {
1547 int rc
= acpi_nfit_register_region(acpi_desc
, nfit_spa
);
1555 int acpi_nfit_init(struct acpi_nfit_desc
*acpi_desc
, acpi_size sz
)
1557 struct device
*dev
= acpi_desc
->dev
;
1562 INIT_LIST_HEAD(&acpi_desc
->spa_maps
);
1563 INIT_LIST_HEAD(&acpi_desc
->spas
);
1564 INIT_LIST_HEAD(&acpi_desc
->dcrs
);
1565 INIT_LIST_HEAD(&acpi_desc
->bdws
);
1566 INIT_LIST_HEAD(&acpi_desc
->idts
);
1567 INIT_LIST_HEAD(&acpi_desc
->flushes
);
1568 INIT_LIST_HEAD(&acpi_desc
->memdevs
);
1569 INIT_LIST_HEAD(&acpi_desc
->dimms
);
1570 mutex_init(&acpi_desc
->spa_map_mutex
);
1572 data
= (u8
*) acpi_desc
->nfit
;
1574 data
+= sizeof(struct acpi_table_nfit
);
1575 while (!IS_ERR_OR_NULL(data
))
1576 data
= add_table(acpi_desc
, data
, end
);
1579 dev_dbg(dev
, "%s: nfit table parsing error: %ld\n", __func__
,
1581 return PTR_ERR(data
);
1584 if (nfit_mem_init(acpi_desc
) != 0)
1587 acpi_nfit_init_dsms(acpi_desc
);
1589 rc
= acpi_nfit_register_dimms(acpi_desc
);
1593 return acpi_nfit_register_regions(acpi_desc
);
1595 EXPORT_SYMBOL_GPL(acpi_nfit_init
);
1597 static int acpi_nfit_add(struct acpi_device
*adev
)
1599 struct nvdimm_bus_descriptor
*nd_desc
;
1600 struct acpi_nfit_desc
*acpi_desc
;
1601 struct device
*dev
= &adev
->dev
;
1602 struct acpi_table_header
*tbl
;
1603 acpi_status status
= AE_OK
;
1607 status
= acpi_get_table_with_size("NFIT", 0, &tbl
, &sz
);
1608 if (ACPI_FAILURE(status
)) {
1609 dev_err(dev
, "failed to find NFIT\n");
1613 acpi_desc
= devm_kzalloc(dev
, sizeof(*acpi_desc
), GFP_KERNEL
);
1617 dev_set_drvdata(dev
, acpi_desc
);
1618 acpi_desc
->dev
= dev
;
1619 acpi_desc
->nfit
= (struct acpi_table_nfit
*) tbl
;
1620 acpi_desc
->blk_do_io
= acpi_nfit_blk_region_do_io
;
1621 nd_desc
= &acpi_desc
->nd_desc
;
1622 nd_desc
->provider_name
= "ACPI.NFIT";
1623 nd_desc
->ndctl
= acpi_nfit_ctl
;
1624 nd_desc
->attr_groups
= acpi_nfit_attribute_groups
;
1626 acpi_desc
->nvdimm_bus
= nvdimm_bus_register(dev
, nd_desc
);
1627 if (!acpi_desc
->nvdimm_bus
)
1630 rc
= acpi_nfit_init(acpi_desc
, sz
);
1632 nvdimm_bus_unregister(acpi_desc
->nvdimm_bus
);
1638 static int acpi_nfit_remove(struct acpi_device
*adev
)
1640 struct acpi_nfit_desc
*acpi_desc
= dev_get_drvdata(&adev
->dev
);
1642 nvdimm_bus_unregister(acpi_desc
->nvdimm_bus
);
1646 static const struct acpi_device_id acpi_nfit_ids
[] = {
1650 MODULE_DEVICE_TABLE(acpi
, acpi_nfit_ids
);
1652 static struct acpi_driver acpi_nfit_driver
= {
1653 .name
= KBUILD_MODNAME
,
1654 .ids
= acpi_nfit_ids
,
1656 .add
= acpi_nfit_add
,
1657 .remove
= acpi_nfit_remove
,
1661 static __init
int nfit_init(void)
1663 BUILD_BUG_ON(sizeof(struct acpi_table_nfit
) != 40);
1664 BUILD_BUG_ON(sizeof(struct acpi_nfit_system_address
) != 56);
1665 BUILD_BUG_ON(sizeof(struct acpi_nfit_memory_map
) != 48);
1666 BUILD_BUG_ON(sizeof(struct acpi_nfit_interleave
) != 20);
1667 BUILD_BUG_ON(sizeof(struct acpi_nfit_smbios
) != 9);
1668 BUILD_BUG_ON(sizeof(struct acpi_nfit_control_region
) != 80);
1669 BUILD_BUG_ON(sizeof(struct acpi_nfit_data_region
) != 40);
1671 acpi_str_to_uuid(UUID_VOLATILE_MEMORY
, nfit_uuid
[NFIT_SPA_VOLATILE
]);
1672 acpi_str_to_uuid(UUID_PERSISTENT_MEMORY
, nfit_uuid
[NFIT_SPA_PM
]);
1673 acpi_str_to_uuid(UUID_CONTROL_REGION
, nfit_uuid
[NFIT_SPA_DCR
]);
1674 acpi_str_to_uuid(UUID_DATA_REGION
, nfit_uuid
[NFIT_SPA_BDW
]);
1675 acpi_str_to_uuid(UUID_VOLATILE_VIRTUAL_DISK
, nfit_uuid
[NFIT_SPA_VDISK
]);
1676 acpi_str_to_uuid(UUID_VOLATILE_VIRTUAL_CD
, nfit_uuid
[NFIT_SPA_VCD
]);
1677 acpi_str_to_uuid(UUID_PERSISTENT_VIRTUAL_DISK
, nfit_uuid
[NFIT_SPA_PDISK
]);
1678 acpi_str_to_uuid(UUID_PERSISTENT_VIRTUAL_CD
, nfit_uuid
[NFIT_SPA_PCD
]);
1679 acpi_str_to_uuid(UUID_NFIT_BUS
, nfit_uuid
[NFIT_DEV_BUS
]);
1680 acpi_str_to_uuid(UUID_NFIT_DIMM
, nfit_uuid
[NFIT_DEV_DIMM
]);
1682 return acpi_bus_register_driver(&acpi_nfit_driver
);
1685 static __exit
void nfit_exit(void)
1687 acpi_bus_unregister_driver(&acpi_nfit_driver
);
1690 module_init(nfit_init
);
1691 module_exit(nfit_exit
);
1692 MODULE_LICENSE("GPL v2");
1693 MODULE_AUTHOR("Intel Corporation");