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 /* https://msdn.microsoft.com/library/windows/hardware/mt604741 */
  35 #define UUID_NFIT_DIMM_N_MSFT "1ee68b36-d4bd-4a1a-9a16-4f8e53d46e05"
  36
  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)
  40
  41 enum nfit_uuids {
  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,
  47         NFIT_SPA_VOLATILE,
  48         NFIT_SPA_PM,
  49         NFIT_SPA_DCR,
  50         NFIT_SPA_BDW,
  51         NFIT_SPA_VDISK,
  52         NFIT_SPA_VCD,
  53         NFIT_SPA_PDISK,
  54         NFIT_SPA_PCD,
  55         NFIT_DEV_BUS,
  56         NFIT_UUID_MAX,
  57 };
  58
  59 /*
  60  * Region format interface codes are stored as an array of bytes in the
  61  * NFIT DIMM Control Region structure
  62  */
  63 #define NFIT_FIC_BYTE cpu_to_be16(0x101) /* byte-addressable energy backed */
  64 #define NFIT_FIC_BLK cpu_to_be16(0x201) /* block-addressable non-energy backed */
  65 #define NFIT_FIC_BYTEN cpu_to_be16(0x301) /* byte-addressable non-energy backed */
  66
  67 enum {
  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,
  78 };
  79
  80 struct nfit_spa {
  81         struct list_head list;
  82         struct nd_region *nd_region;
  83         unsigned int ars_required:1;
  84         u32 clear_err_unit;
  85         u32 max_ars;
  86         struct acpi_nfit_system_address spa[0];
  87 };
  88
  89 struct nfit_dcr {
  90         struct list_head list;
  91         struct acpi_nfit_control_region dcr[0];
  92 };
  93
  94 struct nfit_bdw {
  95         struct list_head list;
  96         struct acpi_nfit_data_region bdw[0];
  97 };
  98
  99 struct nfit_idt {
 100         struct list_head list;
 101         struct acpi_nfit_interleave idt[0];
 102 };
 103
 104 struct nfit_flush {
 105         struct list_head list;
 106         struct acpi_nfit_flush_address flush[0];
 107 };
 108
 109 struct nfit_memdev {
 110         struct list_head list;
 111         struct acpi_nfit_memory_map memdev[0];
 112 };
 113
 114 /* assembled tables for a given dimm/memory-device */
 115 struct nfit_mem {
 116         struct nvdimm *nvdimm;
 117         struct acpi_nfit_memory_map *memdev_dcr;
 118         struct acpi_nfit_memory_map *memdev_pmem;
 119         struct acpi_nfit_memory_map *memdev_bdw;
 120         struct acpi_nfit_control_region *dcr;
 121         struct acpi_nfit_data_region *bdw;
 122         struct acpi_nfit_system_address *spa_dcr;
 123         struct acpi_nfit_system_address *spa_bdw;
 124         struct acpi_nfit_interleave *idt_dcr;
 125         struct acpi_nfit_interleave *idt_bdw;
 126         struct nfit_flush *nfit_flush;
 127         struct list_head list;
 128         struct acpi_device *adev;
 129         struct acpi_nfit_desc *acpi_desc;
 130         struct resource *flush_wpq;
 131         unsigned long dsm_mask;
 132         int family;
 133 };
 134
 135 struct acpi_nfit_desc {
 136         struct nvdimm_bus_descriptor nd_desc;
 137         struct acpi_table_header acpi_header;
 138         struct mutex init_mutex;
 139         struct list_head memdevs;
 140         struct list_head flushes;
 141         struct list_head dimms;
 142         struct list_head spas;
 143         struct list_head dcrs;
 144         struct list_head bdws;
 145         struct list_head idts;
 146         struct nvdimm_bus *nvdimm_bus;
 147         struct device *dev;
 148         struct nd_cmd_ars_status *ars_status;
 149         size_t ars_status_size;
 150         struct work_struct work;
 151         struct kernfs_node *scrub_count_state;
 152         unsigned int scrub_count;
 153         unsigned int cancel:1;
 154         unsigned long dimm_cmd_force_en;
 155         unsigned long bus_cmd_force_en;
 156         int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
 157                         void *iobuf, u64 len, int rw);
 158 };
 159
 160 enum nd_blk_mmio_selector {
 161         BDW,
 162         DCR,
 163 };
 164
 165 struct nd_blk_addr {
 166         union {
 167                 void __iomem *base;
 168                 void *aperture;
 169         };
 170 };
 171
 172 struct nfit_blk {
 173         struct nfit_blk_mmio {
 174                 struct nd_blk_addr addr;
 175                 u64 size;
 176                 u64 base_offset;
 177                 u32 line_size;
 178                 u32 num_lines;
 179                 u32 table_size;
 180                 struct acpi_nfit_interleave *idt;
 181                 struct acpi_nfit_system_address *spa;
 182         } mmio[2];
 183         struct nd_region *nd_region;
 184         u64 bdw_offset; /* post interleave offset */
 185         u64 stat_offset;
 186         u64 cmd_offset;
 187         u32 dimm_flags;
 188 };
 189
 190 static inline struct acpi_nfit_memory_map *__to_nfit_memdev(
 191                 struct nfit_mem *nfit_mem)
 192 {
 193         if (nfit_mem->memdev_dcr)
 194                 return nfit_mem->memdev_dcr;
 195         return nfit_mem->memdev_pmem;
 196 }
 197
 198 static inline struct acpi_nfit_desc *to_acpi_desc(
 199                 struct nvdimm_bus_descriptor *nd_desc)
 200 {
 201         return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
 202 }
 203
 204 const u8 *to_nfit_uuid(enum nfit_uuids id);
 205 int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *nfit, acpi_size sz);
 206 void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev);
 207 #endif /* __NFIT_H__ */