2 * NVDIMM Firmware Interface Table - NFIT
4 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
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.
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.
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>
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)
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 */
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,
64 struct acpi_nfit_system_address *spa;
65 struct list_head list;
66 struct nd_region *nd_region;
67 unsigned int ars_done:1;
73 struct acpi_nfit_control_region *dcr;
74 struct list_head list;
78 struct acpi_nfit_data_region *bdw;
79 struct list_head list;
83 struct acpi_nfit_interleave *idt;
84 struct list_head list;
88 struct acpi_nfit_flush_address *flush;
89 struct list_head list;
93 struct acpi_nfit_memory_map *memdev;
94 struct list_head list;
97 /* assembled tables for a given dimm/memory-device */
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;
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;
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);
142 enum nd_blk_mmio_selector {
150 void __pmem *aperture;
155 struct nfit_blk_mmio {
156 struct nd_blk_addr addr;
162 struct acpi_nfit_interleave *idt;
163 struct acpi_nfit_system_address *spa;
165 struct nd_region *nd_region;
166 u64 bdw_offset; /* post interleave offset */
169 void __iomem *nvdimm_flush;
178 struct nfit_spa_mapping {
179 struct acpi_nfit_desc *acpi_desc;
180 struct acpi_nfit_system_address *spa;
181 struct list_head list;
183 enum spa_map_type type;
184 struct nd_blk_addr addr;
187 static inline struct nfit_spa_mapping *to_spa_map(struct kref *kref)
189 return container_of(kref, struct nfit_spa_mapping, kref);
192 static inline struct acpi_nfit_memory_map *__to_nfit_memdev(
193 struct nfit_mem *nfit_mem)
195 if (nfit_mem->memdev_dcr)
196 return nfit_mem->memdev_dcr;
197 return nfit_mem->memdev_pmem;
200 static inline struct acpi_nfit_desc *to_acpi_desc(
201 struct nvdimm_bus_descriptor *nd_desc)
203 return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
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__ */