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,
63 struct acpi_nfit_system_address *spa;
64 struct list_head list;
69 struct acpi_nfit_control_region *dcr;
70 struct list_head list;
74 struct acpi_nfit_data_region *bdw;
75 struct list_head list;
79 struct acpi_nfit_interleave *idt;
80 struct list_head list;
84 struct acpi_nfit_flush_address *flush;
85 struct list_head list;
89 struct acpi_nfit_memory_map *memdev;
90 struct list_head list;
93 /* assembled tables for a given dimm/memory-device */
95 struct nvdimm *nvdimm;
96 struct acpi_nfit_memory_map *memdev_dcr;
97 struct acpi_nfit_memory_map *memdev_pmem;
98 struct acpi_nfit_memory_map *memdev_bdw;
99 struct acpi_nfit_control_region *dcr;
100 struct acpi_nfit_data_region *bdw;
101 struct acpi_nfit_system_address *spa_dcr;
102 struct acpi_nfit_system_address *spa_bdw;
103 struct acpi_nfit_interleave *idt_dcr;
104 struct acpi_nfit_interleave *idt_bdw;
105 struct nfit_flush *nfit_flush;
106 struct list_head list;
107 struct acpi_device *adev;
108 unsigned long dsm_mask;
111 struct acpi_nfit_desc {
112 struct nvdimm_bus_descriptor nd_desc;
113 struct acpi_table_header acpi_header;
114 struct acpi_nfit_header *nfit;
115 struct mutex spa_map_mutex;
116 struct mutex init_mutex;
117 struct list_head spa_maps;
118 struct list_head memdevs;
119 struct list_head flushes;
120 struct list_head dimms;
121 struct list_head spas;
122 struct list_head dcrs;
123 struct list_head bdws;
124 struct list_head idts;
125 struct nvdimm_bus *nvdimm_bus;
127 struct work_struct work;
128 unsigned int cancel:1;
129 unsigned long dimm_dsm_force_en;
130 unsigned long bus_dsm_force_en;
131 int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
132 void *iobuf, u64 len, int rw);
135 enum nd_blk_mmio_selector {
143 void __pmem *aperture;
148 struct nfit_blk_mmio {
149 struct nd_blk_addr addr;
155 struct acpi_nfit_interleave *idt;
156 struct acpi_nfit_system_address *spa;
158 struct nd_region *nd_region;
159 u64 bdw_offset; /* post interleave offset */
162 void __iomem *nvdimm_flush;
171 struct nfit_spa_mapping {
172 struct acpi_nfit_desc *acpi_desc;
173 struct acpi_nfit_system_address *spa;
174 struct list_head list;
176 enum spa_map_type type;
177 struct nd_blk_addr addr;
180 static inline struct nfit_spa_mapping *to_spa_map(struct kref *kref)
182 return container_of(kref, struct nfit_spa_mapping, kref);
185 static inline struct acpi_nfit_memory_map *__to_nfit_memdev(
186 struct nfit_mem *nfit_mem)
188 if (nfit_mem->memdev_dcr)
189 return nfit_mem->memdev_dcr;
190 return nfit_mem->memdev_pmem;
193 static inline struct acpi_nfit_desc *to_acpi_desc(
194 struct nvdimm_bus_descriptor *nd_desc)
196 return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
199 const u8 *to_nfit_uuid(enum nfit_uuids id);
200 int acpi_nfit_init(struct acpi_nfit_desc *nfit, acpi_size sz);
201 void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev);
202 #endif /* __NFIT_H__ */