drivers/acpi/nfit/nfit.h - arm/linux - Git at Google

 /*
  * 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/ndctl.h>
 #include <linux/types.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 | ACPI_NFIT_MEM_MAP_FAILED)

 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 with the interface as the
  * LSB and the function as the MSB.
  */
 #define NFIT_FIC_BYTE cpu_to_le16(0x101) /* byte-addressable energy backed */
 #define NFIT_FIC_BLK cpu_to_le16(0x201) /* block-addressable non-energy backed */
 #define NFIT_FIC_BYTEN cpu_to_le16(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,
 };

 enum nfit_root_notifiers {
 	NFIT_NOTIFY_UPDATE = 0x80,
 	NFIT_NOTIFY_UC_MEMORY_ERROR = 0x81,
 };

 enum nfit_dimm_notifiers {
 	NFIT_NOTIFY_DIMM_HEALTH = 0x81,
 };

 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 kernfs_node *flags_attr;
 	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;
 	u8 ars_start_flags;
 	struct nd_cmd_ars_status *ars_status;
 	size_t ars_status_size;
 	struct work_struct work;
 	struct list_head list;
 	struct kernfs_node *scrub_count_state;
 	unsigned int scrub_count;
 	unsigned int scrub_mode;
 	unsigned int cancel:1;
 	unsigned int init_complete: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 scrub_mode {
 	HW_ERROR_SCRUB_OFF,
 	HW_ERROR_SCRUB_ON,
 };

 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;
 };

 extern struct list_head acpi_descs;
 extern struct mutex acpi_desc_lock;
 int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc, u8 flags);

 #ifdef CONFIG_X86_MCE
 void nfit_mce_register(void);
 void nfit_mce_unregister(void);
 #else
 static inline void nfit_mce_register(void)
 {
 }
 static inline void nfit_mce_unregister(void)
 {
 }
 #endif

 int nfit_spa_type(struct acpi_nfit_system_address *spa);

 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 guid_t *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_shutdown(void *data);
 void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event);
 void __acpi_nvdimm_notify(struct device *dev, u32 event);
 int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
 		unsigned int cmd, void *buf, unsigned int buf_len, int *cmd_rc);
 void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev);
 #endif /* __NFIT_H__ */
	/*
	* 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/ndctl.h>
	#include <linux/types.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 \| ACPI_NFIT_MEM_MAP_FAILED)

	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 with the interface as the
	* LSB and the function as the MSB.
	*/
	#define NFIT_FIC_BYTE cpu_to_le16(0x101) /* byte-addressable energy backed */
	#define NFIT_FIC_BLK cpu_to_le16(0x201) /* block-addressable non-energy backed */
	#define NFIT_FIC_BYTEN cpu_to_le16(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,
	};

	enum nfit_root_notifiers {
	NFIT_NOTIFY_UPDATE = 0x80,
	NFIT_NOTIFY_UC_MEMORY_ERROR = 0x81,
	};

	enum nfit_dimm_notifiers {
	NFIT_NOTIFY_DIMM_HEALTH = 0x81,
	};

	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 kernfs_node *flags_attr;
	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;
	u8 ars_start_flags;
	struct nd_cmd_ars_status *ars_status;
	size_t ars_status_size;
	struct work_struct work;
	struct list_head list;
	struct kernfs_node *scrub_count_state;
	unsigned int scrub_count;
	unsigned int scrub_mode;
	unsigned int cancel:1;
	unsigned int init_complete: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 scrub_mode {
	HW_ERROR_SCRUB_OFF,
	HW_ERROR_SCRUB_ON,
	};

	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;
	};

	extern struct list_head acpi_descs;
	extern struct mutex acpi_desc_lock;
	int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc, u8 flags);

	#ifdef CONFIG_X86_MCE
	void nfit_mce_register(void);
	void nfit_mce_unregister(void);
	#else
	static inline void nfit_mce_register(void)
	{
	}
	static inline void nfit_mce_unregister(void)
	{
	}
	#endif

	int nfit_spa_type(struct acpi_nfit_system_address *spa);

	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 guid_t *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_shutdown(void *data);
	void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event);
	void __acpi_nvdimm_notify(struct device *dev, u32 event);
	int acpi_nfit_ctl(struct nvdimm_bus_descriptor nd_desc, struct nvdimm nvdimm,
	unsigned int cmd, void buf, unsigned int buf_len, int cmd_rc);
	void acpi_nfit_desc_init(struct acpi_nfit_desc acpi_desc, struct device dev);
	#endif /* __NFIT_H__ */