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/uuid.h> 22 #include <linux/acpi.h> 23 #include <acpi/acuuid.h> 24 25 /* ACPI 6.1 */ 26 #define UUID_NFIT_BUS "2f10e7a4-9e91-11e4-89d3-123b93f75cba" 27 28 /* http://pmem.io/documents/NVDIMM_DSM_Interface_Example.pdf */ 29 #define UUID_NFIT_DIMM "4309ac30-0d11-11e4-9191-0800200c9a66" 30 31 /* https://github.com/HewlettPackard/hpe-nvm/blob/master/Documentation/ */ 32 #define UUID_NFIT_DIMM_N_HPE1 "9002c334-acf3-4c0e-9642-a235f0d53bc6" 33 #define UUID_NFIT_DIMM_N_HPE2 "5008664b-b758-41a0-a03c-27c2f2d04f7e" 34 35 /* https://msdn.microsoft.com/library/windows/hardware/mt604741 */ 36 #define UUID_NFIT_DIMM_N_MSFT "1ee68b36-d4bd-4a1a-9a16-4f8e53d46e05" 37 38 #define ACPI_NFIT_MEM_FAILED_MASK (ACPI_NFIT_MEM_SAVE_FAILED \ 39 | ACPI_NFIT_MEM_RESTORE_FAILED | ACPI_NFIT_MEM_FLUSH_FAILED \ 40 | ACPI_NFIT_MEM_NOT_ARMED) 41 42 enum nfit_uuids { 43 /* for simplicity alias the uuid index with the family id */ 44 NFIT_DEV_DIMM = NVDIMM_FAMILY_INTEL, 45 NFIT_DEV_DIMM_N_HPE1 = NVDIMM_FAMILY_HPE1, 46 NFIT_DEV_DIMM_N_HPE2 = NVDIMM_FAMILY_HPE2, 47 NFIT_DEV_DIMM_N_MSFT = NVDIMM_FAMILY_MSFT, 48 NFIT_SPA_VOLATILE, 49 NFIT_SPA_PM, 50 NFIT_SPA_DCR, 51 NFIT_SPA_BDW, 52 NFIT_SPA_VDISK, 53 NFIT_SPA_VCD, 54 NFIT_SPA_PDISK, 55 NFIT_SPA_PCD, 56 NFIT_DEV_BUS, 57 NFIT_UUID_MAX, 58 }; 59 60 /* 61 * Region format interface codes are stored with the interface as the 62 * LSB and the function as the MSB. 63 */ 64 #define NFIT_FIC_BYTE cpu_to_le16(0x101) /* byte-addressable energy backed */ 65 #define NFIT_FIC_BLK cpu_to_le16(0x201) /* block-addressable non-energy backed */ 66 #define NFIT_FIC_BYTEN cpu_to_le16(0x301) /* byte-addressable non-energy backed */ 67 68 enum { 69 NFIT_BLK_READ_FLUSH = 1, 70 NFIT_BLK_DCR_LATCH = 2, 71 NFIT_ARS_STATUS_DONE = 0, 72 NFIT_ARS_STATUS_BUSY = 1 << 16, 73 NFIT_ARS_STATUS_NONE = 2 << 16, 74 NFIT_ARS_STATUS_INTR = 3 << 16, 75 NFIT_ARS_START_BUSY = 6, 76 NFIT_ARS_CAP_NONE = 1, 77 NFIT_ARS_F_OVERFLOW = 1, 78 NFIT_ARS_TIMEOUT = 90, 79 }; 80 81 enum nfit_root_notifiers { 82 NFIT_NOTIFY_UPDATE = 0x80, 83 }; 84 85 enum nfit_dimm_notifiers { 86 NFIT_NOTIFY_DIMM_HEALTH = 0x81, 87 }; 88 89 struct nfit_spa { 90 struct list_head list; 91 struct nd_region *nd_region; 92 unsigned int ars_required:1; 93 u32 clear_err_unit; 94 u32 max_ars; 95 struct acpi_nfit_system_address spa[0]; 96 }; 97 98 struct nfit_dcr { 99 struct list_head list; 100 struct acpi_nfit_control_region dcr[0]; 101 }; 102 103 struct nfit_bdw { 104 struct list_head list; 105 struct acpi_nfit_data_region bdw[0]; 106 }; 107 108 struct nfit_idt { 109 struct list_head list; 110 struct acpi_nfit_interleave idt[0]; 111 }; 112 113 struct nfit_flush { 114 struct list_head list; 115 struct acpi_nfit_flush_address flush[0]; 116 }; 117 118 struct nfit_memdev { 119 struct list_head list; 120 struct acpi_nfit_memory_map memdev[0]; 121 }; 122 123 /* assembled tables for a given dimm/memory-device */ 124 struct nfit_mem { 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; 142 int family; 143 }; 144 145 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; 157 struct device *dev; 158 struct nd_cmd_ars_status *ars_status; 159 size_t ars_status_size; 160 struct work_struct work; 161 struct list_head list; 162 struct kernfs_node *scrub_count_state; 163 unsigned int scrub_count; 164 unsigned int scrub_mode; 165 unsigned int cancel:1; 166 unsigned long dimm_cmd_force_en; 167 unsigned long bus_cmd_force_en; 168 int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa, 169 void *iobuf, u64 len, int rw); 170 }; 171 172 enum scrub_mode { 173 HW_ERROR_SCRUB_OFF, 174 HW_ERROR_SCRUB_ON, 175 }; 176 177 enum nd_blk_mmio_selector { 178 BDW, 179 DCR, 180 }; 181 182 struct nd_blk_addr { 183 union { 184 void __iomem *base; 185 void *aperture; 186 }; 187 }; 188 189 struct nfit_blk { 190 struct nfit_blk_mmio { 191 struct nd_blk_addr addr; 192 u64 size; 193 u64 base_offset; 194 u32 line_size; 195 u32 num_lines; 196 u32 table_size; 197 struct acpi_nfit_interleave *idt; 198 struct acpi_nfit_system_address *spa; 199 } mmio[2]; 200 struct nd_region *nd_region; 201 u64 bdw_offset; /* post interleave offset */ 202 u64 stat_offset; 203 u64 cmd_offset; 204 u32 dimm_flags; 205 }; 206 207 extern struct list_head acpi_descs; 208 extern struct mutex acpi_desc_lock; 209 int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc); 210 211 #ifdef CONFIG_X86_MCE 212 void nfit_mce_register(void); 213 void nfit_mce_unregister(void); 214 #else 215 static inline void nfit_mce_register(void) 216 { 217 } 218 static inline void nfit_mce_unregister(void) 219 { 220 } 221 #endif 222 223 int nfit_spa_type(struct acpi_nfit_system_address *spa); 224 225 static inline struct acpi_nfit_memory_map *__to_nfit_memdev( 226 struct nfit_mem *nfit_mem) 227 { 228 if (nfit_mem->memdev_dcr) 229 return nfit_mem->memdev_dcr; 230 return nfit_mem->memdev_pmem; 231 } 232 233 static inline struct acpi_nfit_desc *to_acpi_desc( 234 struct nvdimm_bus_descriptor *nd_desc) 235 { 236 return container_of(nd_desc, struct acpi_nfit_desc, nd_desc); 237 } 238 239 const u8 *to_nfit_uuid(enum nfit_uuids id); 240 int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *nfit, acpi_size sz); 241 void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event); 242 void __acpi_nvdimm_notify(struct device *dev, u32 event); 243 int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm, 244 unsigned int cmd, void *buf, unsigned int buf_len, int *cmd_rc); 245 void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev); 246 #endif /* __NFIT_H__ */ 247