]> Git Repo - linux.git/blob - drivers/acpi/nfit.h
Merge branch 'for-4.7/libnvdimm' into libnvdimm-for-next
[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/workqueue.h>
18 #include <linux/libnvdimm.h>
19 #include <linux/types.h>
20 #include <linux/uuid.h>
21 #include <linux/acpi.h>
22 #include <acpi/acuuid.h>
23
24 #define UUID_NFIT_BUS "2f10e7a4-9e91-11e4-89d3-123b93f75cba"
25 #define UUID_NFIT_DIMM "4309ac30-0d11-11e4-9191-0800200c9a66"
26 #define ACPI_NFIT_MEM_FAILED_MASK (ACPI_NFIT_MEM_SAVE_FAILED \
27                 | ACPI_NFIT_MEM_RESTORE_FAILED | ACPI_NFIT_MEM_FLUSH_FAILED \
28                 | ACPI_NFIT_MEM_NOT_ARMED)
29
30 enum nfit_uuids {
31         NFIT_SPA_VOLATILE,
32         NFIT_SPA_PM,
33         NFIT_SPA_DCR,
34         NFIT_SPA_BDW,
35         NFIT_SPA_VDISK,
36         NFIT_SPA_VCD,
37         NFIT_SPA_PDISK,
38         NFIT_SPA_PCD,
39         NFIT_DEV_BUS,
40         NFIT_DEV_DIMM,
41         NFIT_UUID_MAX,
42 };
43
44 enum nfit_fic {
45         NFIT_FIC_BYTE = 0x101, /* byte-addressable energy backed */
46         NFIT_FIC_BLK = 0x201, /* block-addressable non-energy backed */
47         NFIT_FIC_BYTEN = 0x301, /* byte-addressable non-energy backed */
48 };
49
50 enum {
51         NFIT_BLK_READ_FLUSH = 1,
52         NFIT_BLK_DCR_LATCH = 2,
53         NFIT_ARS_STATUS_DONE = 0,
54         NFIT_ARS_STATUS_BUSY = 1 << 16,
55         NFIT_ARS_STATUS_NONE = 2 << 16,
56         NFIT_ARS_STATUS_INTR = 3 << 16,
57         NFIT_ARS_START_BUSY = 6,
58         NFIT_ARS_CAP_NONE = 1,
59         NFIT_ARS_F_OVERFLOW = 1,
60         NFIT_ARS_TIMEOUT = 90,
61 };
62
63 struct nfit_spa {
64         struct acpi_nfit_system_address *spa;
65         struct list_head list;
66         struct nd_region *nd_region;
67         unsigned int ars_done:1;
68         u32 clear_err_unit;
69         u32 max_ars;
70 };
71
72 struct nfit_dcr {
73         struct acpi_nfit_control_region *dcr;
74         struct list_head list;
75 };
76
77 struct nfit_bdw {
78         struct acpi_nfit_data_region *bdw;
79         struct list_head list;
80 };
81
82 struct nfit_idt {
83         struct acpi_nfit_interleave *idt;
84         struct list_head list;
85 };
86
87 struct nfit_flush {
88         struct acpi_nfit_flush_address *flush;
89         struct list_head list;
90 };
91
92 struct nfit_memdev {
93         struct acpi_nfit_memory_map *memdev;
94         struct list_head list;
95 };
96
97 /* assembled tables for a given dimm/memory-device */
98 struct nfit_mem {
99         struct nvdimm *nvdimm;
100         struct acpi_nfit_memory_map *memdev_dcr;
101         struct acpi_nfit_memory_map *memdev_pmem;
102         struct acpi_nfit_memory_map *memdev_bdw;
103         struct acpi_nfit_control_region *dcr;
104         struct acpi_nfit_data_region *bdw;
105         struct acpi_nfit_system_address *spa_dcr;
106         struct acpi_nfit_system_address *spa_bdw;
107         struct acpi_nfit_interleave *idt_dcr;
108         struct acpi_nfit_interleave *idt_bdw;
109         struct nfit_flush *nfit_flush;
110         struct list_head list;
111         struct acpi_device *adev;
112         struct acpi_nfit_desc *acpi_desc;
113         unsigned long dsm_mask;
114 };
115
116 struct acpi_nfit_desc {
117         struct nvdimm_bus_descriptor nd_desc;
118         struct acpi_table_header acpi_header;
119         struct acpi_nfit_header *nfit;
120         struct mutex spa_map_mutex;
121         struct mutex init_mutex;
122         struct list_head spa_maps;
123         struct list_head memdevs;
124         struct list_head flushes;
125         struct list_head dimms;
126         struct list_head spas;
127         struct list_head dcrs;
128         struct list_head bdws;
129         struct list_head idts;
130         struct nvdimm_bus *nvdimm_bus;
131         struct device *dev;
132         struct nd_cmd_ars_status *ars_status;
133         size_t ars_status_size;
134         struct work_struct work;
135         unsigned int cancel:1;
136         unsigned long dimm_dsm_force_en;
137         unsigned long bus_dsm_force_en;
138         int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
139                         void *iobuf, u64 len, int rw);
140 };
141
142 enum nd_blk_mmio_selector {
143         BDW,
144         DCR,
145 };
146
147 struct nd_blk_addr {
148         union {
149                 void __iomem *base;
150                 void __pmem  *aperture;
151         };
152 };
153
154 struct nfit_blk {
155         struct nfit_blk_mmio {
156                 struct nd_blk_addr addr;
157                 u64 size;
158                 u64 base_offset;
159                 u32 line_size;
160                 u32 num_lines;
161                 u32 table_size;
162                 struct acpi_nfit_interleave *idt;
163                 struct acpi_nfit_system_address *spa;
164         } mmio[2];
165         struct nd_region *nd_region;
166         u64 bdw_offset; /* post interleave offset */
167         u64 stat_offset;
168         u64 cmd_offset;
169         void __iomem *nvdimm_flush;
170         u32 dimm_flags;
171 };
172
173 enum spa_map_type {
174         SPA_MAP_CONTROL,
175         SPA_MAP_APERTURE,
176 };
177
178 struct nfit_spa_mapping {
179         struct acpi_nfit_desc *acpi_desc;
180         struct acpi_nfit_system_address *spa;
181         struct list_head list;
182         struct kref kref;
183         enum spa_map_type type;
184         struct nd_blk_addr addr;
185 };
186
187 static inline struct nfit_spa_mapping *to_spa_map(struct kref *kref)
188 {
189         return container_of(kref, struct nfit_spa_mapping, kref);
190 }
191
192 static inline struct acpi_nfit_memory_map *__to_nfit_memdev(
193                 struct nfit_mem *nfit_mem)
194 {
195         if (nfit_mem->memdev_dcr)
196                 return nfit_mem->memdev_dcr;
197         return nfit_mem->memdev_pmem;
198 }
199
200 static inline struct acpi_nfit_desc *to_acpi_desc(
201                 struct nvdimm_bus_descriptor *nd_desc)
202 {
203         return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
204 }
205
206 const u8 *to_nfit_uuid(enum nfit_uuids id);
207 int acpi_nfit_init(struct acpi_nfit_desc *nfit, acpi_size sz);
208 void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev);
209 #endif /* __NFIT_H__ */
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