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 /* ACPI 6.1 */
  25 #define UUID_NFIT_BUS "2f10e7a4-9e91-11e4-89d3-123b93f75cba"
  26
  27 /* http://pmem.io/documents/NVDIMM_DSM_Interface_Example.pdf */
  28 #define UUID_NFIT_DIMM "4309ac30-0d11-11e4-9191-0800200c9a66"
  29
  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"
  33
  34 #define ACPI_NFIT_MEM_FAILED_MASK (ACPI_NFIT_MEM_SAVE_FAILED \
  35                 | ACPI_NFIT_MEM_RESTORE_FAILED | ACPI_NFIT_MEM_FLUSH_FAILED \
  36                 | ACPI_NFIT_MEM_NOT_ARMED)
  37
  38 enum nfit_uuids {
  39         /* for simplicity alias the uuid index with the family id */
  40         NFIT_DEV_DIMM = NVDIMM_FAMILY_INTEL,
  41         NFIT_DEV_DIMM_N_HPE1 = NVDIMM_FAMILY_HPE1,
  42         NFIT_DEV_DIMM_N_HPE2 = NVDIMM_FAMILY_HPE2,
  43         NFIT_SPA_VOLATILE,
  44         NFIT_SPA_PM,
  45         NFIT_SPA_DCR,
  46         NFIT_SPA_BDW,
  47         NFIT_SPA_VDISK,
  48         NFIT_SPA_VCD,
  49         NFIT_SPA_PDISK,
  50         NFIT_SPA_PCD,
  51         NFIT_DEV_BUS,
  52         NFIT_UUID_MAX,
  53 };
  54
  55 /*
  56  * Region format interface codes are stored as an array of bytes in the
  57  * NFIT DIMM Control Region structure
  58  */
  59 #define NFIT_FIC_BYTE cpu_to_be16(0x101) /* byte-addressable energy backed */
  60 #define NFIT_FIC_BLK cpu_to_be16(0x201) /* block-addressable non-energy backed */
  61 #define NFIT_FIC_BYTEN cpu_to_be16(0x301) /* byte-addressable non-energy backed */
  62
  63 enum {
  64         NFIT_BLK_READ_FLUSH = 1,
  65         NFIT_BLK_DCR_LATCH = 2,
  66         NFIT_ARS_STATUS_DONE = 0,
  67         NFIT_ARS_STATUS_BUSY = 1 << 16,
  68         NFIT_ARS_STATUS_NONE = 2 << 16,
  69         NFIT_ARS_STATUS_INTR = 3 << 16,
  70         NFIT_ARS_START_BUSY = 6,
  71         NFIT_ARS_CAP_NONE = 1,
  72         NFIT_ARS_F_OVERFLOW = 1,
  73         NFIT_ARS_TIMEOUT = 90,
  74 };
  75
  76 struct nfit_spa {
  77         struct acpi_nfit_system_address *spa;
  78         struct list_head list;
  79         struct nd_region *nd_region;
  80         unsigned int ars_done:1;
  81         u32 clear_err_unit;
  82         u32 max_ars;
  83 };
  84
  85 struct nfit_dcr {
  86         struct acpi_nfit_control_region *dcr;
  87         struct list_head list;
  88 };
  89
  90 struct nfit_bdw {
  91         struct acpi_nfit_data_region *bdw;
  92         struct list_head list;
  93 };
  94
  95 struct nfit_idt {
  96         struct acpi_nfit_interleave *idt;
  97         struct list_head list;
  98 };
  99
 100 struct nfit_flush {
 101         struct acpi_nfit_flush_address *flush;
 102         struct list_head list;
 103 };
 104
 105 struct nfit_memdev {
 106         struct acpi_nfit_memory_map *memdev;
 107         struct list_head list;
 108 };
 109
 110 /* assembled tables for a given dimm/memory-device */
 111 struct nfit_mem {
 112         struct nvdimm *nvdimm;
 113         struct acpi_nfit_memory_map *memdev_dcr;
 114         struct acpi_nfit_memory_map *memdev_pmem;
 115         struct acpi_nfit_memory_map *memdev_bdw;
 116         struct acpi_nfit_control_region *dcr;
 117         struct acpi_nfit_data_region *bdw;
 118         struct acpi_nfit_system_address *spa_dcr;
 119         struct acpi_nfit_system_address *spa_bdw;
 120         struct acpi_nfit_interleave *idt_dcr;
 121         struct acpi_nfit_interleave *idt_bdw;
 122         struct nfit_flush *nfit_flush;
 123         struct list_head list;
 124         struct acpi_device *adev;
 125         struct acpi_nfit_desc *acpi_desc;
 126         unsigned long dsm_mask;
 127         int family;
 128 };
 129
 130 struct acpi_nfit_desc {
 131         struct nvdimm_bus_descriptor nd_desc;
 132         struct acpi_table_header acpi_header;
 133         struct acpi_nfit_header *nfit;
 134         struct mutex spa_map_mutex;
 135         struct mutex init_mutex;
 136         struct list_head spa_maps;
 137         struct list_head memdevs;
 138         struct list_head flushes;
 139         struct list_head dimms;
 140         struct list_head spas;
 141         struct list_head dcrs;
 142         struct list_head bdws;
 143         struct list_head idts;
 144         struct nvdimm_bus *nvdimm_bus;
 145         struct device *dev;
 146         struct nd_cmd_ars_status *ars_status;
 147         size_t ars_status_size;
 148         struct work_struct work;
 149         unsigned int cancel:1;
 150         unsigned long dimm_cmd_force_en;
 151         unsigned long bus_cmd_force_en;
 152         int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
 153                         void *iobuf, u64 len, int rw);
 154 };
 155
 156 enum nd_blk_mmio_selector {
 157         BDW,
 158         DCR,
 159 };
 160
 161 struct nd_blk_addr {
 162         union {
 163                 void __iomem *base;
 164                 void __pmem  *aperture;
 165         };
 166 };
 167
 168 struct nfit_blk {
 169         struct nfit_blk_mmio {
 170                 struct nd_blk_addr addr;
 171                 u64 size;
 172                 u64 base_offset;
 173                 u32 line_size;
 174                 u32 num_lines;
 175                 u32 table_size;
 176                 struct acpi_nfit_interleave *idt;
 177                 struct acpi_nfit_system_address *spa;
 178         } mmio[2];
 179         struct nd_region *nd_region;
 180         u64 bdw_offset; /* post interleave offset */
 181         u64 stat_offset;
 182         u64 cmd_offset;
 183         void __iomem *nvdimm_flush;
 184         u32 dimm_flags;
 185 };
 186
 187 enum spa_map_type {
 188         SPA_MAP_CONTROL,
 189         SPA_MAP_APERTURE,
 190 };
 191
 192 struct nfit_spa_mapping {
 193         struct acpi_nfit_desc *acpi_desc;
 194         struct acpi_nfit_system_address *spa;
 195         struct list_head list;
 196         struct kref kref;
 197         enum spa_map_type type;
 198         struct nd_blk_addr addr;
 199 };
 200
 201 static inline struct nfit_spa_mapping *to_spa_map(struct kref *kref)
 202 {
 203         return container_of(kref, struct nfit_spa_mapping, kref);
 204 }
 205
 206 static inline struct acpi_nfit_memory_map *__to_nfit_memdev(
 207                 struct nfit_mem *nfit_mem)
 208 {
 209         if (nfit_mem->memdev_dcr)
 210                 return nfit_mem->memdev_dcr;
 211         return nfit_mem->memdev_pmem;
 212 }
 213
 214 static inline struct acpi_nfit_desc *to_acpi_desc(
 215                 struct nvdimm_bus_descriptor *nd_desc)
 216 {
 217         return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
 218 }
 219
 220 const u8 *to_nfit_uuid(enum nfit_uuids id);
 221 int acpi_nfit_init(struct acpi_nfit_desc *nfit, acpi_size sz);
 222 void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev);
 223 #endif /* __NFIT_H__ */