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/ndctl.h>
20 #include <linux/types.h>
21 #include <linux/acpi.h>
22 #include <acpi/acuuid.h>
25 #define UUID_NFIT_BUS "2f10e7a4-9e91-11e4-89d3-123b93f75cba"
27 /* http://pmem.io/documents/NVDIMM_DSM_Interface_Example.pdf */
28 #define UUID_NFIT_DIMM "4309ac30-0d11-11e4-9191-0800200c9a66"
30 /* https://github.com/HewlettPackard/hpe-nvm/blob/master/Documentation/ */
31 #define UUID_NFIT_DIMM_N_HPE1 "9002c334-acf3-4c0e-9642-a235f0d53bc6"
32 #define UUID_NFIT_DIMM_N_HPE2 "5008664b-b758-41a0-a03c-27c2f2d04f7e"
34 /* https://msdn.microsoft.com/library/windows/hardware/mt604741 */
35 #define UUID_NFIT_DIMM_N_MSFT "1ee68b36-d4bd-4a1a-9a16-4f8e53d46e05"
37 #define ACPI_NFIT_MEM_FAILED_MASK (ACPI_NFIT_MEM_SAVE_FAILED \
38 | ACPI_NFIT_MEM_RESTORE_FAILED | ACPI_NFIT_MEM_FLUSH_FAILED \
39 | ACPI_NFIT_MEM_NOT_ARMED | ACPI_NFIT_MEM_MAP_FAILED)
42 /* for simplicity alias the uuid index with the family id */
43 NFIT_DEV_DIMM = NVDIMM_FAMILY_INTEL,
44 NFIT_DEV_DIMM_N_HPE1 = NVDIMM_FAMILY_HPE1,
45 NFIT_DEV_DIMM_N_HPE2 = NVDIMM_FAMILY_HPE2,
46 NFIT_DEV_DIMM_N_MSFT = NVDIMM_FAMILY_MSFT,
60 * Region format interface codes are stored with the interface as the
61 * LSB and the function as the MSB.
63 #define NFIT_FIC_BYTE cpu_to_le16(0x101) /* byte-addressable energy backed */
64 #define NFIT_FIC_BLK cpu_to_le16(0x201) /* block-addressable non-energy backed */
65 #define NFIT_FIC_BYTEN cpu_to_le16(0x301) /* byte-addressable non-energy backed */
68 NFIT_BLK_READ_FLUSH = 1,
69 NFIT_BLK_DCR_LATCH = 2,
70 NFIT_ARS_STATUS_DONE = 0,
71 NFIT_ARS_STATUS_BUSY = 1 << 16,
72 NFIT_ARS_STATUS_NONE = 2 << 16,
73 NFIT_ARS_STATUS_INTR = 3 << 16,
74 NFIT_ARS_START_BUSY = 6,
75 NFIT_ARS_CAP_NONE = 1,
76 NFIT_ARS_F_OVERFLOW = 1,
77 NFIT_ARS_TIMEOUT = 90,
80 enum nfit_root_notifiers {
81 NFIT_NOTIFY_UPDATE = 0x80,
82 NFIT_NOTIFY_UC_MEMORY_ERROR = 0x81,
85 enum nfit_dimm_notifiers {
86 NFIT_NOTIFY_DIMM_HEALTH = 0x81,
90 struct list_head list;
91 struct nd_region *nd_region;
92 unsigned int ars_required:1;
95 struct acpi_nfit_system_address spa[0];
99 struct list_head list;
100 struct acpi_nfit_control_region dcr[0];
104 struct list_head list;
105 struct acpi_nfit_data_region bdw[0];
109 struct list_head list;
110 struct acpi_nfit_interleave idt[0];
114 struct list_head list;
115 struct acpi_nfit_flush_address flush[0];
119 struct list_head list;
120 struct acpi_nfit_memory_map memdev[0];
123 /* assembled tables for a given dimm/memory-device */
125 struct nvdimm *nvdimm;
126 struct acpi_nfit_memory_map *memdev_dcr;
127 struct acpi_nfit_memory_map *memdev_pmem;
128 struct acpi_nfit_memory_map *memdev_bdw;
129 struct acpi_nfit_control_region *dcr;
130 struct acpi_nfit_data_region *bdw;
131 struct acpi_nfit_system_address *spa_dcr;
132 struct acpi_nfit_system_address *spa_bdw;
133 struct acpi_nfit_interleave *idt_dcr;
134 struct acpi_nfit_interleave *idt_bdw;
135 struct kernfs_node *flags_attr;
136 struct nfit_flush *nfit_flush;
137 struct list_head list;
138 struct acpi_device *adev;
139 struct acpi_nfit_desc *acpi_desc;
140 struct resource *flush_wpq;
141 unsigned long dsm_mask;
145 struct acpi_nfit_desc {
146 struct nvdimm_bus_descriptor nd_desc;
147 struct acpi_table_header acpi_header;
148 struct mutex init_mutex;
149 struct list_head memdevs;
150 struct list_head flushes;
151 struct list_head dimms;
152 struct list_head spas;
153 struct list_head dcrs;
154 struct list_head bdws;
155 struct list_head idts;
156 struct nvdimm_bus *nvdimm_bus;
159 struct nd_cmd_ars_status *ars_status;
160 size_t ars_status_size;
161 struct work_struct work;
162 struct list_head list;
163 struct kernfs_node *scrub_count_state;
164 unsigned int scrub_count;
165 unsigned int scrub_mode;
166 unsigned int cancel:1;
167 unsigned int init_complete:1;
168 unsigned long dimm_cmd_force_en;
169 unsigned long bus_cmd_force_en;
170 int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
171 void *iobuf, u64 len, int rw);
179 enum nd_blk_mmio_selector {
192 struct nfit_blk_mmio {
193 struct nd_blk_addr addr;
199 struct acpi_nfit_interleave *idt;
200 struct acpi_nfit_system_address *spa;
202 struct nd_region *nd_region;
203 u64 bdw_offset; /* post interleave offset */
209 extern struct list_head acpi_descs;
210 extern struct mutex acpi_desc_lock;
211 int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc, u8 flags);
213 #ifdef CONFIG_X86_MCE
214 void nfit_mce_register(void);
215 void nfit_mce_unregister(void);
217 static inline void nfit_mce_register(void)
220 static inline void nfit_mce_unregister(void)
225 int nfit_spa_type(struct acpi_nfit_system_address *spa);
227 static inline struct acpi_nfit_memory_map *__to_nfit_memdev(
228 struct nfit_mem *nfit_mem)
230 if (nfit_mem->memdev_dcr)
231 return nfit_mem->memdev_dcr;
232 return nfit_mem->memdev_pmem;
235 static inline struct acpi_nfit_desc *to_acpi_desc(
236 struct nvdimm_bus_descriptor *nd_desc)
238 return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
241 const guid_t *to_nfit_uuid(enum nfit_uuids id);
242 int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *nfit, acpi_size sz);
243 void acpi_nfit_shutdown(void *data);
244 void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event);
245 void __acpi_nvdimm_notify(struct device *dev, u32 event);
246 int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
247 unsigned int cmd, void *buf, unsigned int buf_len, int *cmd_rc);
248 void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev);
249 #endif /* __NFIT_H__ */