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Diffstat (limited to 'drivers/acpi/nfit/nfit.h')
| -rw-r--r-- | drivers/acpi/nfit/nfit.h | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h new file mode 100644 index 000000000000..6ecf337c97aa --- /dev/null +++ b/drivers/acpi/nfit/nfit.h @@ -0,0 +1,207 @@ +/* + * NVDIMM Firmware Interface Table - NFIT + * + * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ +#ifndef __NFIT_H__ +#define __NFIT_H__ +#include <linux/workqueue.h> +#include <linux/libnvdimm.h> +#include <linux/types.h> +#include <linux/uuid.h> +#include <linux/acpi.h> +#include <acpi/acuuid.h> + +/* ACPI 6.1 */ +#define UUID_NFIT_BUS "2f10e7a4-9e91-11e4-89d3-123b93f75cba" + +/* http://pmem.io/documents/NVDIMM_DSM_Interface_Example.pdf */ +#define UUID_NFIT_DIMM "4309ac30-0d11-11e4-9191-0800200c9a66" + +/* https://github.com/HewlettPackard/hpe-nvm/blob/master/Documentation/ */ +#define UUID_NFIT_DIMM_N_HPE1 "9002c334-acf3-4c0e-9642-a235f0d53bc6" +#define UUID_NFIT_DIMM_N_HPE2 "5008664b-b758-41a0-a03c-27c2f2d04f7e" + +/* https://msdn.microsoft.com/library/windows/hardware/mt604741 */ +#define UUID_NFIT_DIMM_N_MSFT "1ee68b36-d4bd-4a1a-9a16-4f8e53d46e05" + +#define ACPI_NFIT_MEM_FAILED_MASK (ACPI_NFIT_MEM_SAVE_FAILED \ + | ACPI_NFIT_MEM_RESTORE_FAILED | ACPI_NFIT_MEM_FLUSH_FAILED \ + | ACPI_NFIT_MEM_NOT_ARMED) + +enum nfit_uuids { + /* for simplicity alias the uuid index with the family id */ + NFIT_DEV_DIMM = NVDIMM_FAMILY_INTEL, + NFIT_DEV_DIMM_N_HPE1 = NVDIMM_FAMILY_HPE1, + NFIT_DEV_DIMM_N_HPE2 = NVDIMM_FAMILY_HPE2, + NFIT_DEV_DIMM_N_MSFT = NVDIMM_FAMILY_MSFT, + NFIT_SPA_VOLATILE, + NFIT_SPA_PM, + NFIT_SPA_DCR, + NFIT_SPA_BDW, + NFIT_SPA_VDISK, + NFIT_SPA_VCD, + NFIT_SPA_PDISK, + NFIT_SPA_PCD, + NFIT_DEV_BUS, + NFIT_UUID_MAX, +}; + +/* + * Region format interface codes are stored as an array of bytes in the + * NFIT DIMM Control Region structure + */ +#define NFIT_FIC_BYTE cpu_to_be16(0x101) /* byte-addressable energy backed */ +#define NFIT_FIC_BLK cpu_to_be16(0x201) /* block-addressable non-energy backed */ +#define NFIT_FIC_BYTEN cpu_to_be16(0x301) /* byte-addressable non-energy backed */ + +enum { + NFIT_BLK_READ_FLUSH = 1, + NFIT_BLK_DCR_LATCH = 2, + NFIT_ARS_STATUS_DONE = 0, + NFIT_ARS_STATUS_BUSY = 1 << 16, + NFIT_ARS_STATUS_NONE = 2 << 16, + NFIT_ARS_STATUS_INTR = 3 << 16, + NFIT_ARS_START_BUSY = 6, + NFIT_ARS_CAP_NONE = 1, + NFIT_ARS_F_OVERFLOW = 1, + NFIT_ARS_TIMEOUT = 90, +}; + +struct nfit_spa { + struct list_head list; + struct nd_region *nd_region; + unsigned int ars_required:1; + u32 clear_err_unit; + u32 max_ars; + struct acpi_nfit_system_address spa[0]; +}; + +struct nfit_dcr { + struct list_head list; + struct acpi_nfit_control_region dcr[0]; +}; + +struct nfit_bdw { + struct list_head list; + struct acpi_nfit_data_region bdw[0]; +}; + +struct nfit_idt { + struct list_head list; + struct acpi_nfit_interleave idt[0]; +}; + +struct nfit_flush { + struct list_head list; + struct acpi_nfit_flush_address flush[0]; +}; + +struct nfit_memdev { + struct list_head list; + struct acpi_nfit_memory_map memdev[0]; +}; + +/* assembled tables for a given dimm/memory-device */ +struct nfit_mem { + struct nvdimm *nvdimm; + struct acpi_nfit_memory_map *memdev_dcr; + struct acpi_nfit_memory_map *memdev_pmem; + struct acpi_nfit_memory_map *memdev_bdw; + struct acpi_nfit_control_region *dcr; + struct acpi_nfit_data_region *bdw; + struct acpi_nfit_system_address *spa_dcr; + struct acpi_nfit_system_address *spa_bdw; + struct acpi_nfit_interleave *idt_dcr; + struct acpi_nfit_interleave *idt_bdw; + struct nfit_flush *nfit_flush; + struct list_head list; + struct acpi_device *adev; + struct acpi_nfit_desc *acpi_desc; + struct resource *flush_wpq; + unsigned long dsm_mask; + int family; +}; + +struct acpi_nfit_desc { + struct nvdimm_bus_descriptor nd_desc; + struct acpi_table_header acpi_header; + struct mutex init_mutex; + struct list_head memdevs; + struct list_head flushes; + struct list_head dimms; + struct list_head spas; + struct list_head dcrs; + struct list_head bdws; + struct list_head idts; + struct nvdimm_bus *nvdimm_bus; + struct device *dev; + struct nd_cmd_ars_status *ars_status; + size_t ars_status_size; + struct work_struct work; + struct kernfs_node *scrub_count_state; + unsigned int scrub_count; + unsigned int cancel:1; + unsigned long dimm_cmd_force_en; + unsigned long bus_cmd_force_en; + int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa, + void *iobuf, u64 len, int rw); +}; + +enum nd_blk_mmio_selector { + BDW, + DCR, +}; + +struct nd_blk_addr { + union { + void __iomem *base; + void *aperture; + }; +}; + +struct nfit_blk { + struct nfit_blk_mmio { + struct nd_blk_addr addr; + u64 size; + u64 base_offset; + u32 line_size; + u32 num_lines; + u32 table_size; + struct acpi_nfit_interleave *idt; + struct acpi_nfit_system_address *spa; + } mmio[2]; + struct nd_region *nd_region; + u64 bdw_offset; /* post interleave offset */ + u64 stat_offset; + u64 cmd_offset; + u32 dimm_flags; +}; + +static inline struct acpi_nfit_memory_map *__to_nfit_memdev( + struct nfit_mem *nfit_mem) +{ + if (nfit_mem->memdev_dcr) + return nfit_mem->memdev_dcr; + return nfit_mem->memdev_pmem; +} + +static inline struct acpi_nfit_desc *to_acpi_desc( + struct nvdimm_bus_descriptor *nd_desc) +{ + return container_of(nd_desc, struct acpi_nfit_desc, nd_desc); +} + +const u8 *to_nfit_uuid(enum nfit_uuids id); +int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *nfit, acpi_size sz); +void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev); +#endif /* __NFIT_H__ */ |