nfit, tools/testing/nvdimm: add format interface code definitions
[cascardo/linux.git] / drivers / acpi / nfit.h
1 /*
2  * NVDIMM Firmware Interface Table - NFIT
3  *
4  * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of version 2 of the GNU General Public License as
8  * published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License for more details.
14  */
15 #ifndef __NFIT_H__
16 #define __NFIT_H__
17 #include <linux/libnvdimm.h>
18 #include <linux/types.h>
19 #include <linux/uuid.h>
20 #include <linux/acpi.h>
21 #include <acpi/acuuid.h>
22
23 #define UUID_NFIT_BUS "2f10e7a4-9e91-11e4-89d3-123b93f75cba"
24 #define UUID_NFIT_DIMM "4309ac30-0d11-11e4-9191-0800200c9a66"
25 #define ACPI_NFIT_MEM_FAILED_MASK (ACPI_NFIT_MEM_SAVE_FAILED \
26                 | ACPI_NFIT_MEM_RESTORE_FAILED | ACPI_NFIT_MEM_FLUSH_FAILED \
27                 | ACPI_NFIT_MEM_NOT_ARMED)
28
29 enum nfit_uuids {
30         NFIT_SPA_VOLATILE,
31         NFIT_SPA_PM,
32         NFIT_SPA_DCR,
33         NFIT_SPA_BDW,
34         NFIT_SPA_VDISK,
35         NFIT_SPA_VCD,
36         NFIT_SPA_PDISK,
37         NFIT_SPA_PCD,
38         NFIT_DEV_BUS,
39         NFIT_DEV_DIMM,
40         NFIT_UUID_MAX,
41 };
42
43 enum nfit_fic {
44         NFIT_FIC_BYTE = 0x101, /* byte-addressable energy backed */
45         NFIT_FIC_BLK = 0x201, /* block-addressable non-energy backed */
46         NFIT_FIC_BYTEN = 0x301, /* byte-addressable non-energy backed */
47 };
48
49 enum {
50         ND_BLK_READ_FLUSH = 1,
51         ND_BLK_DCR_LATCH = 2,
52 };
53
54 struct nfit_spa {
55         struct acpi_nfit_system_address *spa;
56         struct list_head list;
57         int is_registered;
58 };
59
60 struct nfit_dcr {
61         struct acpi_nfit_control_region *dcr;
62         struct list_head list;
63 };
64
65 struct nfit_bdw {
66         struct acpi_nfit_data_region *bdw;
67         struct list_head list;
68 };
69
70 struct nfit_idt {
71         struct acpi_nfit_interleave *idt;
72         struct list_head list;
73 };
74
75 struct nfit_flush {
76         struct acpi_nfit_flush_address *flush;
77         struct list_head list;
78 };
79
80 struct nfit_memdev {
81         struct acpi_nfit_memory_map *memdev;
82         struct list_head list;
83 };
84
85 /* assembled tables for a given dimm/memory-device */
86 struct nfit_mem {
87         struct nvdimm *nvdimm;
88         struct acpi_nfit_memory_map *memdev_dcr;
89         struct acpi_nfit_memory_map *memdev_pmem;
90         struct acpi_nfit_memory_map *memdev_bdw;
91         struct acpi_nfit_control_region *dcr;
92         struct acpi_nfit_data_region *bdw;
93         struct acpi_nfit_system_address *spa_dcr;
94         struct acpi_nfit_system_address *spa_bdw;
95         struct acpi_nfit_interleave *idt_dcr;
96         struct acpi_nfit_interleave *idt_bdw;
97         struct nfit_flush *nfit_flush;
98         struct list_head list;
99         struct acpi_device *adev;
100         unsigned long dsm_mask;
101 };
102
103 struct acpi_nfit_desc {
104         struct nvdimm_bus_descriptor nd_desc;
105         struct acpi_table_header acpi_header;
106         struct acpi_nfit_header *nfit;
107         struct mutex spa_map_mutex;
108         struct mutex init_mutex;
109         struct list_head spa_maps;
110         struct list_head memdevs;
111         struct list_head flushes;
112         struct list_head dimms;
113         struct list_head spas;
114         struct list_head dcrs;
115         struct list_head bdws;
116         struct list_head idts;
117         struct nvdimm_bus *nvdimm_bus;
118         struct device *dev;
119         unsigned long dimm_dsm_force_en;
120         unsigned long bus_dsm_force_en;
121         int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
122                         void *iobuf, u64 len, int rw);
123 };
124
125 enum nd_blk_mmio_selector {
126         BDW,
127         DCR,
128 };
129
130 struct nd_blk_addr {
131         union {
132                 void __iomem *base;
133                 void __pmem  *aperture;
134         };
135 };
136
137 struct nfit_blk {
138         struct nfit_blk_mmio {
139                 struct nd_blk_addr addr;
140                 u64 size;
141                 u64 base_offset;
142                 u32 line_size;
143                 u32 num_lines;
144                 u32 table_size;
145                 struct acpi_nfit_interleave *idt;
146                 struct acpi_nfit_system_address *spa;
147         } mmio[2];
148         struct nd_region *nd_region;
149         u64 bdw_offset; /* post interleave offset */
150         u64 stat_offset;
151         u64 cmd_offset;
152         void __iomem *nvdimm_flush;
153         u32 dimm_flags;
154 };
155
156 enum spa_map_type {
157         SPA_MAP_CONTROL,
158         SPA_MAP_APERTURE,
159 };
160
161 struct nfit_spa_mapping {
162         struct acpi_nfit_desc *acpi_desc;
163         struct acpi_nfit_system_address *spa;
164         struct list_head list;
165         struct kref kref;
166         enum spa_map_type type;
167         struct nd_blk_addr addr;
168 };
169
170 static inline struct nfit_spa_mapping *to_spa_map(struct kref *kref)
171 {
172         return container_of(kref, struct nfit_spa_mapping, kref);
173 }
174
175 static inline struct acpi_nfit_memory_map *__to_nfit_memdev(
176                 struct nfit_mem *nfit_mem)
177 {
178         if (nfit_mem->memdev_dcr)
179                 return nfit_mem->memdev_dcr;
180         return nfit_mem->memdev_pmem;
181 }
182
183 static inline struct acpi_nfit_desc *to_acpi_desc(
184                 struct nvdimm_bus_descriptor *nd_desc)
185 {
186         return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
187 }
188
189 const u8 *to_nfit_uuid(enum nfit_uuids id);
190 int acpi_nfit_init(struct acpi_nfit_desc *nfit, acpi_size sz);
191 extern const struct attribute_group *acpi_nfit_attribute_groups[];
192 #endif /* __NFIT_H__ */