These changes are the raw update to linux-4.4.6-rt14. Kernel sources
[kvmfornfv.git] / kernel / 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 {
44         ND_BLK_READ_FLUSH = 1,
45         ND_BLK_DCR_LATCH = 2,
46 };
47
48 struct nfit_spa {
49         struct acpi_nfit_system_address *spa;
50         struct list_head list;
51         int is_registered;
52 };
53
54 struct nfit_dcr {
55         struct acpi_nfit_control_region *dcr;
56         struct list_head list;
57 };
58
59 struct nfit_bdw {
60         struct acpi_nfit_data_region *bdw;
61         struct list_head list;
62 };
63
64 struct nfit_idt {
65         struct acpi_nfit_interleave *idt;
66         struct list_head list;
67 };
68
69 struct nfit_flush {
70         struct acpi_nfit_flush_address *flush;
71         struct list_head list;
72 };
73
74 struct nfit_memdev {
75         struct acpi_nfit_memory_map *memdev;
76         struct list_head list;
77 };
78
79 /* assembled tables for a given dimm/memory-device */
80 struct nfit_mem {
81         struct nvdimm *nvdimm;
82         struct acpi_nfit_memory_map *memdev_dcr;
83         struct acpi_nfit_memory_map *memdev_pmem;
84         struct acpi_nfit_memory_map *memdev_bdw;
85         struct acpi_nfit_control_region *dcr;
86         struct acpi_nfit_data_region *bdw;
87         struct acpi_nfit_system_address *spa_dcr;
88         struct acpi_nfit_system_address *spa_bdw;
89         struct acpi_nfit_interleave *idt_dcr;
90         struct acpi_nfit_interleave *idt_bdw;
91         struct nfit_flush *nfit_flush;
92         struct list_head list;
93         struct acpi_device *adev;
94         unsigned long dsm_mask;
95 };
96
97 struct acpi_nfit_desc {
98         struct nvdimm_bus_descriptor nd_desc;
99         struct acpi_table_header acpi_header;
100         struct acpi_nfit_header *nfit;
101         struct mutex spa_map_mutex;
102         struct mutex init_mutex;
103         struct list_head spa_maps;
104         struct list_head memdevs;
105         struct list_head flushes;
106         struct list_head dimms;
107         struct list_head spas;
108         struct list_head dcrs;
109         struct list_head bdws;
110         struct list_head idts;
111         struct nvdimm_bus *nvdimm_bus;
112         struct device *dev;
113         unsigned long dimm_dsm_force_en;
114         unsigned long bus_dsm_force_en;
115         int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
116                         void *iobuf, u64 len, int rw);
117 };
118
119 enum nd_blk_mmio_selector {
120         BDW,
121         DCR,
122 };
123
124 struct nd_blk_addr {
125         union {
126                 void __iomem *base;
127                 void __pmem  *aperture;
128         };
129 };
130
131 struct nfit_blk {
132         struct nfit_blk_mmio {
133                 struct nd_blk_addr addr;
134                 u64 size;
135                 u64 base_offset;
136                 u32 line_size;
137                 u32 num_lines;
138                 u32 table_size;
139                 struct acpi_nfit_interleave *idt;
140                 struct acpi_nfit_system_address *spa;
141         } mmio[2];
142         struct nd_region *nd_region;
143         u64 bdw_offset; /* post interleave offset */
144         u64 stat_offset;
145         u64 cmd_offset;
146         void __iomem *nvdimm_flush;
147         u32 dimm_flags;
148 };
149
150 enum spa_map_type {
151         SPA_MAP_CONTROL,
152         SPA_MAP_APERTURE,
153 };
154
155 struct nfit_spa_mapping {
156         struct acpi_nfit_desc *acpi_desc;
157         struct acpi_nfit_system_address *spa;
158         struct list_head list;
159         struct kref kref;
160         enum spa_map_type type;
161         struct nd_blk_addr addr;
162 };
163
164 static inline struct nfit_spa_mapping *to_spa_map(struct kref *kref)
165 {
166         return container_of(kref, struct nfit_spa_mapping, kref);
167 }
168
169 static inline struct acpi_nfit_memory_map *__to_nfit_memdev(
170                 struct nfit_mem *nfit_mem)
171 {
172         if (nfit_mem->memdev_dcr)
173                 return nfit_mem->memdev_dcr;
174         return nfit_mem->memdev_pmem;
175 }
176
177 static inline struct acpi_nfit_desc *to_acpi_desc(
178                 struct nvdimm_bus_descriptor *nd_desc)
179 {
180         return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
181 }
182
183 const u8 *to_nfit_uuid(enum nfit_uuids id);
184 int acpi_nfit_init(struct acpi_nfit_desc *nfit, acpi_size sz);
185 extern const struct attribute_group *acpi_nfit_attribute_groups[];
186 #endif /* __NFIT_H__ */