summaryrefslogtreecommitdiff
path: root/drivers/acpi/nfit/nfit.h
blob: 7d15856a739f9dc70cbb4e325d95395829cb6b63 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
/*
 * NVDIMM Firmware Interface Table - NFIT
 *
 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */
#ifndef __NFIT_H__
#define __NFIT_H__
#include <linux/workqueue.h>
#include <linux/libnvdimm.h>
#include <linux/ndctl.h>
#include <linux/types.h>
#include <linux/acpi.h>
#include <acpi/acuuid.h>

/* ACPI 6.1 */
#define UUID_NFIT_BUS "2f10e7a4-9e91-11e4-89d3-123b93f75cba"

/* http://pmem.io/documents/NVDIMM_DSM_Interface-V1.6.pdf */
#define UUID_NFIT_DIMM "4309ac30-0d11-11e4-9191-0800200c9a66"

/* https://github.com/HewlettPackard/hpe-nvm/blob/master/Documentation/ */
#define UUID_NFIT_DIMM_N_HPE1 "9002c334-acf3-4c0e-9642-a235f0d53bc6"
#define UUID_NFIT_DIMM_N_HPE2 "5008664b-b758-41a0-a03c-27c2f2d04f7e"

/* https://msdn.microsoft.com/library/windows/hardware/mt604741 */
#define UUID_NFIT_DIMM_N_MSFT "1ee68b36-d4bd-4a1a-9a16-4f8e53d46e05"

#define ACPI_NFIT_MEM_FAILED_MASK (ACPI_NFIT_MEM_SAVE_FAILED \
		| ACPI_NFIT_MEM_RESTORE_FAILED | ACPI_NFIT_MEM_FLUSH_FAILED \
		| ACPI_NFIT_MEM_NOT_ARMED | ACPI_NFIT_MEM_MAP_FAILED)

#define NVDIMM_FAMILY_MAX NVDIMM_FAMILY_MSFT

#define NVDIMM_STANDARD_CMDMASK \
(1 << ND_CMD_SMART | 1 << ND_CMD_SMART_THRESHOLD | 1 << ND_CMD_DIMM_FLAGS \
 | 1 << ND_CMD_GET_CONFIG_SIZE | 1 << ND_CMD_GET_CONFIG_DATA \
 | 1 << ND_CMD_SET_CONFIG_DATA | 1 << ND_CMD_VENDOR_EFFECT_LOG_SIZE \
 | 1 << ND_CMD_VENDOR_EFFECT_LOG | 1 << ND_CMD_VENDOR)

/*
 * Command numbers that the kernel needs to know about to handle
 * non-default DSM revision ids
 */
enum nvdimm_family_cmds {
	NVDIMM_INTEL_LATCH_SHUTDOWN = 10,
	NVDIMM_INTEL_GET_MODES = 11,
	NVDIMM_INTEL_GET_FWINFO = 12,
	NVDIMM_INTEL_START_FWUPDATE = 13,
	NVDIMM_INTEL_SEND_FWUPDATE = 14,
	NVDIMM_INTEL_FINISH_FWUPDATE = 15,
	NVDIMM_INTEL_QUERY_FWUPDATE = 16,
	NVDIMM_INTEL_SET_THRESHOLD = 17,
	NVDIMM_INTEL_INJECT_ERROR = 18,
};

#define NVDIMM_INTEL_CMDMASK \
(NVDIMM_STANDARD_CMDMASK | 1 << NVDIMM_INTEL_GET_MODES \
 | 1 << NVDIMM_INTEL_GET_FWINFO | 1 << NVDIMM_INTEL_START_FWUPDATE \
 | 1 << NVDIMM_INTEL_SEND_FWUPDATE | 1 << NVDIMM_INTEL_FINISH_FWUPDATE \
 | 1 << NVDIMM_INTEL_QUERY_FWUPDATE | 1 << NVDIMM_INTEL_SET_THRESHOLD \
 | 1 << NVDIMM_INTEL_INJECT_ERROR | 1 << NVDIMM_INTEL_LATCH_SHUTDOWN)

enum nfit_uuids {
	/* for simplicity alias the uuid index with the family id */
	NFIT_DEV_DIMM = NVDIMM_FAMILY_INTEL,
	NFIT_DEV_DIMM_N_HPE1 = NVDIMM_FAMILY_HPE1,
	NFIT_DEV_DIMM_N_HPE2 = NVDIMM_FAMILY_HPE2,
	NFIT_DEV_DIMM_N_MSFT = NVDIMM_FAMILY_MSFT,
	NFIT_SPA_VOLATILE,
	NFIT_SPA_PM,
	NFIT_SPA_DCR,
	NFIT_SPA_BDW,
	NFIT_SPA_VDISK,
	NFIT_SPA_VCD,
	NFIT_SPA_PDISK,
	NFIT_SPA_PCD,
	NFIT_DEV_BUS,
	NFIT_UUID_MAX,
};

/*
 * Region format interface codes are stored with the interface as the
 * LSB and the function as the MSB.
 */
#define NFIT_FIC_BYTE cpu_to_le16(0x101) /* byte-addressable energy backed */
#define NFIT_FIC_BLK cpu_to_le16(0x201) /* block-addressable non-energy backed */
#define NFIT_FIC_BYTEN cpu_to_le16(0x301) /* byte-addressable non-energy backed */

enum {
	NFIT_BLK_READ_FLUSH = 1,
	NFIT_BLK_DCR_LATCH = 2,
	NFIT_ARS_STATUS_DONE = 0,
	NFIT_ARS_STATUS_BUSY = 1 << 16,
	NFIT_ARS_STATUS_NONE = 2 << 16,
	NFIT_ARS_STATUS_INTR = 3 << 16,
	NFIT_ARS_START_BUSY = 6,
	NFIT_ARS_CAP_NONE = 1,
	NFIT_ARS_F_OVERFLOW = 1,
	NFIT_ARS_TIMEOUT = 90,
};

enum nfit_root_notifiers {
	NFIT_NOTIFY_UPDATE = 0x80,
	NFIT_NOTIFY_UC_MEMORY_ERROR = 0x81,
};

enum nfit_dimm_notifiers {
	NFIT_NOTIFY_DIMM_HEALTH = 0x81,
};

enum nfit_ars_state {
	ARS_REQ,
	ARS_DONE,
	ARS_SHORT,
	ARS_FAILED,
};

struct nfit_spa {
	struct list_head list;
	struct nd_region *nd_region;
	unsigned long ars_state;
	u32 clear_err_unit;
	u32 max_ars;
	struct acpi_nfit_system_address spa[0];
};

struct nfit_dcr {
	struct list_head list;
	struct acpi_nfit_control_region dcr[0];
};

struct nfit_bdw {
	struct list_head list;
	struct acpi_nfit_data_region bdw[0];
};

struct nfit_idt {
	struct list_head list;
	struct acpi_nfit_interleave idt[0];
};

struct nfit_flush {
	struct list_head list;
	struct acpi_nfit_flush_address flush[0];
};

struct nfit_memdev {
	struct list_head list;
	struct acpi_nfit_memory_map memdev[0];
};

/* assembled tables for a given dimm/memory-device */
struct nfit_mem {
	struct nvdimm *nvdimm;
	struct acpi_nfit_memory_map *memdev_dcr;
	struct acpi_nfit_memory_map *memdev_pmem;
	struct acpi_nfit_memory_map *memdev_bdw;
	struct acpi_nfit_control_region *dcr;
	struct acpi_nfit_data_region *bdw;
	struct acpi_nfit_system_address *spa_dcr;
	struct acpi_nfit_system_address *spa_bdw;
	struct acpi_nfit_interleave *idt_dcr;
	struct acpi_nfit_interleave *idt_bdw;
	struct kernfs_node *flags_attr;
	struct nfit_flush *nfit_flush;
	struct list_head list;
	struct acpi_device *adev;
	struct acpi_nfit_desc *acpi_desc;
	struct resource *flush_wpq;
	unsigned long dsm_mask;
	int family;
	bool has_lsr;
	bool has_lsw;
};

struct acpi_nfit_desc {
	struct nvdimm_bus_descriptor nd_desc;
	struct acpi_table_header acpi_header;
	struct mutex init_mutex;
	struct list_head memdevs;
	struct list_head flushes;
	struct list_head dimms;
	struct list_head spas;
	struct list_head dcrs;
	struct list_head bdws;
	struct list_head idts;
	struct nvdimm_bus *nvdimm_bus;
	struct device *dev;
	u8 ars_start_flags;
	struct nd_cmd_ars_status *ars_status;
	struct delayed_work dwork;
	struct list_head list;
	struct kernfs_node *scrub_count_state;
	unsigned int max_ars;
	unsigned int scrub_count;
	unsigned int scrub_mode;
	unsigned int cancel:1;
	unsigned long dimm_cmd_force_en;
	unsigned long bus_cmd_force_en;
	unsigned long bus_nfit_cmd_force_en;
	unsigned int platform_cap;
	unsigned int scrub_tmo;
	int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
			void *iobuf, u64 len, int rw);
};

enum scrub_mode {
	HW_ERROR_SCRUB_OFF,
	HW_ERROR_SCRUB_ON,
};

enum nd_blk_mmio_selector {
	BDW,
	DCR,
};

struct nd_blk_addr {
	union {
		void __iomem *base;
		void *aperture;
	};
};

struct nfit_blk {
	struct nfit_blk_mmio {
		struct nd_blk_addr addr;
		u64 size;
		u64 base_offset;
		u32 line_size;
		u32 num_lines;
		u32 table_size;
		struct acpi_nfit_interleave *idt;
		struct acpi_nfit_system_address *spa;
	} mmio[2];
	struct nd_region *nd_region;
	u64 bdw_offset; /* post interleave offset */
	u64 stat_offset;
	u64 cmd_offset;
	u32 dimm_flags;
};

extern struct list_head acpi_descs;
extern struct mutex acpi_desc_lock;
int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc, unsigned long flags);

#ifdef CONFIG_X86_MCE
void nfit_mce_register(void);
void nfit_mce_unregister(void);
#else
static inline void nfit_mce_register(void)
{
}
static inline void nfit_mce_unregister(void)
{
}
#endif

int nfit_spa_type(struct acpi_nfit_system_address *spa);

static inline struct acpi_nfit_memory_map *__to_nfit_memdev(
		struct nfit_mem *nfit_mem)
{
	if (nfit_mem->memdev_dcr)
		return nfit_mem->memdev_dcr;
	return nfit_mem->memdev_pmem;
}

static inline struct acpi_nfit_desc *to_acpi_desc(
		struct nvdimm_bus_descriptor *nd_desc)
{
	return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
}

const guid_t *to_nfit_uuid(enum nfit_uuids id);
int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *nfit, acpi_size sz);
void acpi_nfit_shutdown(void *data);
void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event);
void __acpi_nvdimm_notify(struct device *dev, u32 event);
int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
		unsigned int cmd, void *buf, unsigned int buf_len, int *cmd_rc);
void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev);
#endif /* __NFIT_H__ */