drivers/acpi/nfit/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/ndctl.h>
  20 #include <linux/types.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-V1.6.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 | ACPI_NFIT_MEM_MAP_FAILED)
  40
  41 #define NVDIMM_FAMILY_MAX NVDIMM_FAMILY_MSFT
  42
  43 #define NVDIMM_STANDARD_CMDMASK \
  44 (1 << ND_CMD_SMART | 1 << ND_CMD_SMART_THRESHOLD | 1 << ND_CMD_DIMM_FLAGS \
  45  | 1 << ND_CMD_GET_CONFIG_SIZE | 1 << ND_CMD_GET_CONFIG_DATA \
  46  | 1 << ND_CMD_SET_CONFIG_DATA | 1 << ND_CMD_VENDOR_EFFECT_LOG_SIZE \
  47  | 1 << ND_CMD_VENDOR_EFFECT_LOG | 1 << ND_CMD_VENDOR)
  48
  49 /*
  50  * Command numbers that the kernel needs to know about to handle
  51  * non-default DSM revision ids
  52  */
  53 enum nvdimm_family_cmds {
  54         NVDIMM_INTEL_LATCH_SHUTDOWN = 10,
  55         NVDIMM_INTEL_GET_MODES = 11,
  56         NVDIMM_INTEL_GET_FWINFO = 12,
  57         NVDIMM_INTEL_START_FWUPDATE = 13,
  58         NVDIMM_INTEL_SEND_FWUPDATE = 14,
  59         NVDIMM_INTEL_FINISH_FWUPDATE = 15,
  60         NVDIMM_INTEL_QUERY_FWUPDATE = 16,
  61         NVDIMM_INTEL_SET_THRESHOLD = 17,
  62         NVDIMM_INTEL_INJECT_ERROR = 18,
  63 };
  64
  65 #define NVDIMM_INTEL_CMDMASK \
  66 (NVDIMM_STANDARD_CMDMASK | 1 << NVDIMM_INTEL_GET_MODES \
  67  | 1 << NVDIMM_INTEL_GET_FWINFO | 1 << NVDIMM_INTEL_START_FWUPDATE \
  68  | 1 << NVDIMM_INTEL_SEND_FWUPDATE | 1 << NVDIMM_INTEL_FINISH_FWUPDATE \
  69  | 1 << NVDIMM_INTEL_QUERY_FWUPDATE | 1 << NVDIMM_INTEL_SET_THRESHOLD \
  70  | 1 << NVDIMM_INTEL_INJECT_ERROR | 1 << NVDIMM_INTEL_LATCH_SHUTDOWN)
  71
  72 enum nfit_uuids {
  73         /* for simplicity alias the uuid index with the family id */
  74         NFIT_DEV_DIMM = NVDIMM_FAMILY_INTEL,
  75         NFIT_DEV_DIMM_N_HPE1 = NVDIMM_FAMILY_HPE1,
  76         NFIT_DEV_DIMM_N_HPE2 = NVDIMM_FAMILY_HPE2,
  77         NFIT_DEV_DIMM_N_MSFT = NVDIMM_FAMILY_MSFT,
  78         NFIT_SPA_VOLATILE,
  79         NFIT_SPA_PM,
  80         NFIT_SPA_DCR,
  81         NFIT_SPA_BDW,
  82         NFIT_SPA_VDISK,
  83         NFIT_SPA_VCD,
  84         NFIT_SPA_PDISK,
  85         NFIT_SPA_PCD,
  86         NFIT_DEV_BUS,
  87         NFIT_UUID_MAX,
  88 };
  89
  90 /*
  91  * Region format interface codes are stored with the interface as the
  92  * LSB and the function as the MSB.
  93  */
  94 #define NFIT_FIC_BYTE cpu_to_le16(0x101) /* byte-addressable energy backed */
  95 #define NFIT_FIC_BLK cpu_to_le16(0x201) /* block-addressable non-energy backed */
  96 #define NFIT_FIC_BYTEN cpu_to_le16(0x301) /* byte-addressable non-energy backed */
  97
  98 enum {
  99         NFIT_BLK_READ_FLUSH = 1,
 100         NFIT_BLK_DCR_LATCH = 2,
 101         NFIT_ARS_STATUS_DONE = 0,
 102         NFIT_ARS_STATUS_BUSY = 1 << 16,
 103         NFIT_ARS_STATUS_NONE = 2 << 16,
 104         NFIT_ARS_STATUS_INTR = 3 << 16,
 105         NFIT_ARS_START_BUSY = 6,
 106         NFIT_ARS_CAP_NONE = 1,
 107         NFIT_ARS_F_OVERFLOW = 1,
 108         NFIT_ARS_TIMEOUT = 90,
 109 };
 110
 111 enum nfit_root_notifiers {
 112         NFIT_NOTIFY_UPDATE = 0x80,
 113         NFIT_NOTIFY_UC_MEMORY_ERROR = 0x81,
 114 };
 115
 116 enum nfit_dimm_notifiers {
 117         NFIT_NOTIFY_DIMM_HEALTH = 0x81,
 118 };
 119
 120 enum nfit_ars_state {
 121         ARS_REQ,
 122         ARS_DONE,
 123         ARS_SHORT,
 124         ARS_FAILED,
 125 };
 126
 127 struct nfit_spa {
 128         struct list_head list;
 129         struct nd_region *nd_region;
 130         unsigned long ars_state;
 131         u32 clear_err_unit;
 132         u32 max_ars;
 133         struct acpi_nfit_system_address spa[0];
 134 };
 135
 136 struct nfit_dcr {
 137         struct list_head list;
 138         struct acpi_nfit_control_region dcr[0];
 139 };
 140
 141 struct nfit_bdw {
 142         struct list_head list;
 143         struct acpi_nfit_data_region bdw[0];
 144 };
 145
 146 struct nfit_idt {
 147         struct list_head list;
 148         struct acpi_nfit_interleave idt[0];
 149 };
 150
 151 struct nfit_flush {
 152         struct list_head list;
 153         struct acpi_nfit_flush_address flush[0];
 154 };
 155
 156 struct nfit_memdev {
 157         struct list_head list;
 158         struct acpi_nfit_memory_map memdev[0];
 159 };
 160
 161 /* assembled tables for a given dimm/memory-device */
 162 struct nfit_mem {
 163         struct nvdimm *nvdimm;
 164         struct acpi_nfit_memory_map *memdev_dcr;
 165         struct acpi_nfit_memory_map *memdev_pmem;
 166         struct acpi_nfit_memory_map *memdev_bdw;
 167         struct acpi_nfit_control_region *dcr;
 168         struct acpi_nfit_data_region *bdw;
 169         struct acpi_nfit_system_address *spa_dcr;
 170         struct acpi_nfit_system_address *spa_bdw;
 171         struct acpi_nfit_interleave *idt_dcr;
 172         struct acpi_nfit_interleave *idt_bdw;
 173         struct kernfs_node *flags_attr;
 174         struct nfit_flush *nfit_flush;
 175         struct list_head list;
 176         struct acpi_device *adev;
 177         struct acpi_nfit_desc *acpi_desc;
 178         struct resource *flush_wpq;
 179         unsigned long dsm_mask;
 180         int family;
 181         bool has_lsr;
 182         bool has_lsw;
 183 };
 184
 185 struct acpi_nfit_desc {
 186         struct nvdimm_bus_descriptor nd_desc;
 187         struct acpi_table_header acpi_header;
 188         struct mutex init_mutex;
 189         struct list_head memdevs;
 190         struct list_head flushes;
 191         struct list_head dimms;
 192         struct list_head spas;
 193         struct list_head dcrs;
 194         struct list_head bdws;
 195         struct list_head idts;
 196         struct nvdimm_bus *nvdimm_bus;
 197         struct device *dev;
 198         u8 ars_start_flags;
 199         struct nd_cmd_ars_status *ars_status;
 200         size_t ars_status_size;
 201         struct work_struct work;
 202         struct list_head list;
 203         struct kernfs_node *scrub_count_state;
 204         unsigned int scrub_count;
 205         unsigned int scrub_mode;
 206         unsigned int cancel:1;
 207         unsigned int init_complete:1;
 208         unsigned long dimm_cmd_force_en;
 209         unsigned long bus_cmd_force_en;
 210         unsigned long bus_nfit_cmd_force_en;
 211         unsigned int platform_cap;
 212         int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
 213                         void *iobuf, u64 len, int rw);
 214 };
 215
 216 enum scrub_mode {
 217         HW_ERROR_SCRUB_OFF,
 218         HW_ERROR_SCRUB_ON,
 219 };
 220
 221 enum nd_blk_mmio_selector {
 222         BDW,
 223         DCR,
 224 };
 225
 226 struct nd_blk_addr {
 227         union {
 228                 void __iomem *base;
 229                 void *aperture;
 230         };
 231 };
 232
 233 struct nfit_blk {
 234         struct nfit_blk_mmio {
 235                 struct nd_blk_addr addr;
 236                 u64 size;
 237                 u64 base_offset;
 238                 u32 line_size;
 239                 u32 num_lines;
 240                 u32 table_size;
 241                 struct acpi_nfit_interleave *idt;
 242                 struct acpi_nfit_system_address *spa;
 243         } mmio[2];
 244         struct nd_region *nd_region;
 245         u64 bdw_offset; /* post interleave offset */
 246         u64 stat_offset;
 247         u64 cmd_offset;
 248         u32 dimm_flags;
 249 };
 250
 251 extern struct list_head acpi_descs;
 252 extern struct mutex acpi_desc_lock;
 253 int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc, unsigned long flags);
 254
 255 #ifdef CONFIG_X86_MCE
 256 void nfit_mce_register(void);
 257 void nfit_mce_unregister(void);
 258 #else
 259 static inline void nfit_mce_register(void)
 260 {
 261 }
 262 static inline void nfit_mce_unregister(void)
 263 {
 264 }
 265 #endif
 266
 267 int nfit_spa_type(struct acpi_nfit_system_address *spa);
 268
 269 static inline struct acpi_nfit_memory_map *__to_nfit_memdev(
 270                 struct nfit_mem *nfit_mem)
 271 {
 272         if (nfit_mem->memdev_dcr)
 273                 return nfit_mem->memdev_dcr;
 274         return nfit_mem->memdev_pmem;
 275 }
 276
 277 static inline struct acpi_nfit_desc *to_acpi_desc(
 278                 struct nvdimm_bus_descriptor *nd_desc)
 279 {
 280         return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
 281 }
 282
 283 const guid_t *to_nfit_uuid(enum nfit_uuids id);
 284 int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *nfit, acpi_size sz);
 285 void acpi_nfit_shutdown(void *data);
 286 void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event);
 287 void __acpi_nvdimm_notify(struct device *dev, u32 event);
 288 int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
 289                 unsigned int cmd, void *buf, unsigned int buf_len, int *cmd_rc);
 290 void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev);
 291 #endif /* __NFIT_H__ */