[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / nvme.h

/*
 * Definitions for the NVM Express interface
 * Copyright (c) 2011, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef _LINUX_NVME_H
#define _LINUX_NVME_H

#include <linux/types.h>

struct nvme_bar {
	__u64			cap;	/* Controller Capabilities */
	__u32			vs;	/* Version */
	__u32			intms;	/* Interrupt Mask Set */
	__u32			intmc;	/* Interrupt Mask Clear */
	__u32			cc;	/* Controller Configuration */
	__u32			rsvd1;	/* Reserved */
	__u32			csts;	/* Controller Status */
	__u32			rsvd2;	/* Reserved */
	__u32			aqa;	/* Admin Queue Attributes */
	__u64			asq;	/* Admin SQ Base Address */
	__u64			acq;	/* Admin CQ Base Address */
};

#define NVME_CAP_MQES(cap)	((cap) & 0xffff)
#define NVME_CAP_TIMEOUT(cap)	(((cap) >> 24) & 0xff)
#define NVME_CAP_STRIDE(cap)	(((cap) >> 32) & 0xf)
#define NVME_CAP_MPSMIN(cap)	(((cap) >> 48) & 0xf)

enum {
	NVME_CC_ENABLE		= 1 << 0,
	NVME_CC_CSS_NVM		= 0 << 4,
	NVME_CC_MPS_SHIFT	= 7,
	NVME_CC_ARB_RR		= 0 << 11,
	NVME_CC_ARB_WRRU	= 1 << 11,
	NVME_CC_ARB_VS		= 7 << 11,
	NVME_CC_SHN_NONE	= 0 << 14,
	NVME_CC_SHN_NORMAL	= 1 << 14,
	NVME_CC_SHN_ABRUPT	= 2 << 14,
	NVME_CC_IOSQES		= 6 << 16,
	NVME_CC_IOCQES		= 4 << 20,
	NVME_CSTS_RDY		= 1 << 0,
	NVME_CSTS_CFS		= 1 << 1,
	NVME_CSTS_SHST_NORMAL	= 0 << 2,
	NVME_CSTS_SHST_OCCUR	= 1 << 2,
	NVME_CSTS_SHST_CMPLT	= 2 << 2,
};

struct nvme_id_power_state {
	__le16			max_power;	/* centiwatts */
	__u16			rsvd2;
	__le32			entry_lat;	/* microseconds */
	__le32			exit_lat;	/* microseconds */
	__u8			read_tput;
	__u8			read_lat;
	__u8			write_tput;
	__u8			write_lat;
	__u8			rsvd16[16];
};

#define NVME_VS(major, minor)	(major << 16 | minor)

struct nvme_id_ctrl {
	__le16			vid;
	__le16			ssvid;
	char			sn[20];
	char			mn[40];
	char			fr[8];
	__u8			rab;
	__u8			ieee[3];
	__u8			mic;
	__u8			mdts;
	__u8			rsvd78[178];
	__le16			oacs;
	__u8			acl;
	__u8			aerl;
	__u8			frmw;
	__u8			lpa;
	__u8			elpe;
	__u8			npss;
	__u8			rsvd264[248];
	__u8			sqes;
	__u8			cqes;
	__u8			rsvd514[2];
	__le32			nn;
	__le16			oncs;
	__le16			fuses;
	__u8			fna;
	__u8			vwc;
	__le16			awun;
	__le16			awupf;
	__u8			rsvd530[1518];
	struct nvme_id_power_state	psd[32];
	__u8			vs[1024];
};

enum {
	NVME_CTRL_ONCS_COMPARE			= 1 << 0,
	NVME_CTRL_ONCS_WRITE_UNCORRECTABLE	= 1 << 1,
	NVME_CTRL_ONCS_DSM			= 1 << 2,
};

struct nvme_lbaf {
	__le16			ms;
	__u8			ds;
	__u8			rp;
};

struct nvme_id_ns {
	__le64			nsze;
	__le64			ncap;
	__le64			nuse;
	__u8			nsfeat;
	__u8			nlbaf;
	__u8			flbas;
	__u8			mc;
	__u8			dpc;
	__u8			dps;
	__u8			rsvd30[98];
	struct nvme_lbaf	lbaf[16];
	__u8			rsvd192[192];
	__u8			vs[3712];
};

enum {
	NVME_NS_FEAT_THIN	= 1 << 0,
	NVME_LBAF_RP_BEST	= 0,
	NVME_LBAF_RP_BETTER	= 1,
	NVME_LBAF_RP_GOOD	= 2,
	NVME_LBAF_RP_DEGRADED	= 3,
};

struct nvme_smart_log {
	__u8			critical_warning;
	__u8			temperature[2];
	__u8			avail_spare;
	__u8			spare_thresh;
	__u8			percent_used;
	__u8			rsvd6[26];
	__u8			data_units_read[16];
	__u8			data_units_written[16];
	__u8			host_reads[16];
	__u8			host_writes[16];
	__u8			ctrl_busy_time[16];
	__u8			power_cycles[16];
	__u8			power_on_hours[16];
	__u8			unsafe_shutdowns[16];
	__u8			media_errors[16];
	__u8			num_err_log_entries[16];
	__u8			rsvd192[320];
};

enum {
	NVME_SMART_CRIT_SPARE		= 1 << 0,
	NVME_SMART_CRIT_TEMPERATURE	= 1 << 1,
	NVME_SMART_CRIT_RELIABILITY	= 1 << 2,
	NVME_SMART_CRIT_MEDIA		= 1 << 3,
	NVME_SMART_CRIT_VOLATILE_MEMORY	= 1 << 4,
};

struct nvme_lba_range_type {
	__u8			type;
	__u8			attributes;
	__u8			rsvd2[14];
	__u64			slba;
	__u64			nlb;
	__u8			guid[16];
	__u8			rsvd48[16];
};

enum {
	NVME_LBART_TYPE_FS	= 0x01,
	NVME_LBART_TYPE_RAID	= 0x02,
	NVME_LBART_TYPE_CACHE	= 0x03,
	NVME_LBART_TYPE_SWAP	= 0x04,

	NVME_LBART_ATTRIB_TEMP	= 1 << 0,
	NVME_LBART_ATTRIB_HIDE	= 1 << 1,
};

/* I/O commands */

enum nvme_opcode {
	nvme_cmd_flush		= 0x00,
	nvme_cmd_write		= 0x01,
	nvme_cmd_read		= 0x02,
	nvme_cmd_write_uncor	= 0x04,
	nvme_cmd_compare	= 0x05,
	nvme_cmd_dsm		= 0x09,
};

struct nvme_common_command {
	__u8			opcode;
	__u8			flags;
	__u16			command_id;
	__le32			nsid;
	__le32			cdw2[2];
	__le64			metadata;
	__le64			prp1;
	__le64			prp2;
	__le32			cdw10[6];
};

struct nvme_rw_command {
	__u8			opcode;
	__u8			flags;
	__u16			command_id;
	__le32			nsid;
	__u64			rsvd2;
	__le64			metadata;
	__le64			prp1;
	__le64			prp2;
	__le64			slba;
	__le16			length;
	__le16			control;
	__le32			dsmgmt;
	__le32			reftag;
	__le16			apptag;
	__le16			appmask;
};

enum {
	NVME_RW_LR			= 1 << 15,
	NVME_RW_FUA			= 1 << 14,
	NVME_RW_DSM_FREQ_UNSPEC		= 0,
	NVME_RW_DSM_FREQ_TYPICAL	= 1,
	NVME_RW_DSM_FREQ_RARE		= 2,
	NVME_RW_DSM_FREQ_READS		= 3,
	NVME_RW_DSM_FREQ_WRITES		= 4,
	NVME_RW_DSM_FREQ_RW		= 5,
	NVME_RW_DSM_FREQ_ONCE		= 6,
	NVME_RW_DSM_FREQ_PREFETCH	= 7,
	NVME_RW_DSM_FREQ_TEMP		= 8,
	NVME_RW_DSM_LATENCY_NONE	= 0 << 4,
	NVME_RW_DSM_LATENCY_IDLE	= 1 << 4,
	NVME_RW_DSM_LATENCY_NORM	= 2 << 4,
	NVME_RW_DSM_LATENCY_LOW		= 3 << 4,
	NVME_RW_DSM_SEQ_REQ		= 1 << 6,
	NVME_RW_DSM_COMPRESSED		= 1 << 7,
};

struct nvme_dsm_cmd {
	__u8			opcode;
	__u8			flags;
	__u16			command_id;
	__le32			nsid;
	__u64			rsvd2[2];
	__le64			prp1;
	__le64			prp2;
	__le32			nr;
	__le32			attributes;
	__u32			rsvd12[4];
};

enum {
	NVME_DSMGMT_IDR		= 1 << 0,
	NVME_DSMGMT_IDW		= 1 << 1,
	NVME_DSMGMT_AD		= 1 << 2,
};

struct nvme_dsm_range {
	__le32			cattr;
	__le32			nlb;
	__le64			slba;
};

/* Admin commands */

enum nvme_admin_opcode {
	nvme_admin_delete_sq		= 0x00,
	nvme_admin_create_sq		= 0x01,
	nvme_admin_get_log_page		= 0x02,
	nvme_admin_delete_cq		= 0x04,
	nvme_admin_create_cq		= 0x05,
	nvme_admin_identify		= 0x06,
	nvme_admin_abort_cmd		= 0x08,
	nvme_admin_set_features		= 0x09,
	nvme_admin_get_features		= 0x0a,
	nvme_admin_async_event		= 0x0c,
	nvme_admin_activate_fw		= 0x10,
	nvme_admin_download_fw		= 0x11,
	nvme_admin_format_nvm		= 0x80,
	nvme_admin_security_send	= 0x81,
	nvme_admin_security_recv	= 0x82,
};

enum {
	NVME_QUEUE_PHYS_CONTIG	= (1 << 0),
	NVME_CQ_IRQ_ENABLED	= (1 << 1),
	NVME_SQ_PRIO_URGENT	= (0 << 1),
	NVME_SQ_PRIO_HIGH	= (1 << 1),
	NVME_SQ_PRIO_MEDIUM	= (2 << 1),
	NVME_SQ_PRIO_LOW	= (3 << 1),
	NVME_FEAT_ARBITRATION	= 0x01,
	NVME_FEAT_POWER_MGMT	= 0x02,
	NVME_FEAT_LBA_RANGE	= 0x03,
	NVME_FEAT_TEMP_THRESH	= 0x04,
	NVME_FEAT_ERR_RECOVERY	= 0x05,
	NVME_FEAT_VOLATILE_WC	= 0x06,
	NVME_FEAT_NUM_QUEUES	= 0x07,
	NVME_FEAT_IRQ_COALESCE	= 0x08,
	NVME_FEAT_IRQ_CONFIG	= 0x09,
	NVME_FEAT_WRITE_ATOMIC	= 0x0a,
	NVME_FEAT_ASYNC_EVENT	= 0x0b,
	NVME_FEAT_SW_PROGRESS	= 0x0c,
};

struct nvme_identify {
	__u8			opcode;
	__u8			flags;
	__u16			command_id;
	__le32			nsid;
	__u64			rsvd2[2];
	__le64			prp1;
	__le64			prp2;
	__le32			cns;
	__u32			rsvd11[5];
};

struct nvme_features {
	__u8			opcode;
	__u8			flags;
	__u16			command_id;
	__le32			nsid;
	__u64			rsvd2[2];
	__le64			prp1;
	__le64			prp2;
	__le32			fid;
	__le32			dword11;
	__u32			rsvd12[4];
};

struct nvme_create_cq {
	__u8			opcode;
	__u8			flags;
	__u16			command_id;
	__u32			rsvd1[5];
	__le64			prp1;
	__u64			rsvd8;
	__le16			cqid;
	__le16			qsize;
	__le16			cq_flags;
	__le16			irq_vector;
	__u32			rsvd12[4];
};

struct nvme_create_sq {
	__u8			opcode;
	__u8			flags;
	__u16			command_id;
	__u32			rsvd1[5];
	__le64			prp1;
	__u64			rsvd8;
	__le16			sqid;
	__le16			qsize;
	__le16			sq_flags;
	__le16			cqid;
	__u32			rsvd12[4];
};

struct nvme_delete_queue {
	__u8			opcode;
	__u8			flags;
	__u16			command_id;
	__u32			rsvd1[9];
	__le16			qid;
	__u16			rsvd10;
	__u32			rsvd11[5];
};

struct nvme_download_firmware {
	__u8			opcode;
	__u8			flags;
	__u16			command_id;
	__u32			rsvd1[5];
	__le64			prp1;
	__le64			prp2;
	__le32			numd;
	__le32			offset;
	__u32			rsvd12[4];
};

struct nvme_format_cmd {
	__u8			opcode;
	__u8			flags;
	__u16			command_id;
	__le32			nsid;
	__u64			rsvd2[4];
	__le32			cdw10;
	__u32			rsvd11[5];
};

struct nvme_command {
	union {
		struct nvme_common_command common;
		struct nvme_rw_command rw;
		struct nvme_identify identify;
		struct nvme_features features;
		struct nvme_create_cq create_cq;
		struct nvme_create_sq create_sq;
		struct nvme_delete_queue delete_queue;
		struct nvme_download_firmware dlfw;
		struct nvme_format_cmd format;
		struct nvme_dsm_cmd dsm;
	};
};

enum {
	NVME_SC_SUCCESS			= 0x0,
	NVME_SC_INVALID_OPCODE		= 0x1,
	NVME_SC_INVALID_FIELD		= 0x2,
	NVME_SC_CMDID_CONFLICT		= 0x3,
	NVME_SC_DATA_XFER_ERROR		= 0x4,
	NVME_SC_POWER_LOSS		= 0x5,
	NVME_SC_INTERNAL		= 0x6,
	NVME_SC_ABORT_REQ		= 0x7,
	NVME_SC_ABORT_QUEUE		= 0x8,
	NVME_SC_FUSED_FAIL		= 0x9,
	NVME_SC_FUSED_MISSING		= 0xa,
	NVME_SC_INVALID_NS		= 0xb,
	NVME_SC_CMD_SEQ_ERROR		= 0xc,
	NVME_SC_LBA_RANGE		= 0x80,
	NVME_SC_CAP_EXCEEDED		= 0x81,
	NVME_SC_NS_NOT_READY		= 0x82,
	NVME_SC_CQ_INVALID		= 0x100,
	NVME_SC_QID_INVALID		= 0x101,
	NVME_SC_QUEUE_SIZE		= 0x102,
	NVME_SC_ABORT_LIMIT		= 0x103,
	NVME_SC_ABORT_MISSING		= 0x104,
	NVME_SC_ASYNC_LIMIT		= 0x105,
	NVME_SC_FIRMWARE_SLOT		= 0x106,
	NVME_SC_FIRMWARE_IMAGE		= 0x107,
	NVME_SC_INVALID_VECTOR		= 0x108,
	NVME_SC_INVALID_LOG_PAGE	= 0x109,
	NVME_SC_INVALID_FORMAT		= 0x10a,
	NVME_SC_BAD_ATTRIBUTES		= 0x180,
	NVME_SC_WRITE_FAULT		= 0x280,
	NVME_SC_READ_ERROR		= 0x281,
	NVME_SC_GUARD_CHECK		= 0x282,
	NVME_SC_APPTAG_CHECK		= 0x283,
	NVME_SC_REFTAG_CHECK		= 0x284,
	NVME_SC_COMPARE_FAILED		= 0x285,
	NVME_SC_ACCESS_DENIED		= 0x286,
};

struct nvme_completion {
	__le32	result;		/* Used by admin commands to return data */
	__u32	rsvd;
	__le16	sq_head;	/* how much of this queue may be reclaimed */
	__le16	sq_id;		/* submission queue that generated this entry */
	__u16	command_id;	/* of the command which completed */
	__le16	status;		/* did the command fail, and if so, why? */
};

struct nvme_user_io {
	__u8	opcode;
	__u8	flags;
	__u16	control;
	__u16	nblocks;
	__u16	rsvd;
	__u64	metadata;
	__u64	addr;
	__u64	slba;
	__u32	dsmgmt;
	__u32	reftag;
	__u16	apptag;
	__u16	appmask;
};

struct nvme_admin_cmd {
	__u8	opcode;
	__u8	flags;
	__u16	rsvd1;
	__u32	nsid;
	__u32	cdw2;
	__u32	cdw3;
	__u64	metadata;
	__u64	addr;
	__u32	metadata_len;
	__u32	data_len;
	__u32	cdw10;
	__u32	cdw11;
	__u32	cdw12;
	__u32	cdw13;
	__u32	cdw14;
	__u32	cdw15;
	__u32	timeout_ms;
	__u32	result;
};

#define NVME_IOCTL_ID		_IO('N', 0x40)
#define NVME_IOCTL_ADMIN_CMD	_IOWR('N', 0x41, struct nvme_admin_cmd)
#define NVME_IOCTL_SUBMIT_IO	_IOW('N', 0x42, struct nvme_user_io)

#ifdef __KERNEL__
#include <linux/pci.h>
#include <linux/miscdevice.h>
#include <linux/kref.h>

#define NVME_IO_TIMEOUT	(5 * HZ)

/*
 * Represents an NVM Express device.  Each nvme_dev is a PCI function.
 */
struct nvme_dev {
	struct list_head node;
	struct nvme_queue **queues;
	u32 __iomem *dbs;
	struct pci_dev *pci_dev;
	struct dma_pool *prp_page_pool;
	struct dma_pool *prp_small_pool;
	int instance;
	int queue_count;
	int db_stride;
	u32 ctrl_config;
	struct msix_entry *entry;
	struct nvme_bar __iomem *bar;
	struct list_head namespaces;
	struct kref kref;
	struct miscdevice miscdev;
	char name[12];
	char serial[20];
	char model[40];
	char firmware_rev[8];
	u32 max_hw_sectors;
	u32 stripe_size;
	u16 oncs;
};

/*
 * An NVM Express namespace is equivalent to a SCSI LUN
 */
struct nvme_ns {
	struct list_head list;

	struct nvme_dev *dev;
	struct request_queue *queue;
	struct gendisk *disk;

	int ns_id;
	int lba_shift;
	int ms;
	u64 mode_select_num_blocks;
	u32 mode_select_block_len;
};

/*
 * The nvme_iod describes the data in an I/O, including the list of PRP
 * entries.  You can't see it in this data structure because C doesn't let
 * me express that.  Use nvme_alloc_iod to ensure there's enough space
 * allocated to store the PRP list.
 */
struct nvme_iod {
	void *private;		/* For the use of the submitter of the I/O */
	int npages;		/* In the PRP list. 0 means small pool in use */
	int offset;		/* Of PRP list */
	int nents;		/* Used in scatterlist */
	int length;		/* Of data, in bytes */
	dma_addr_t first_dma;
	struct scatterlist sg[0];
};

static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector)
{
	return (sector >> (ns->lba_shift - 9));
}

/**
 * nvme_free_iod - frees an nvme_iod
 * @dev: The device that the I/O was submitted to
 * @iod: The memory to free
 */
void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod);

int nvme_setup_prps(struct nvme_dev *dev, struct nvme_common_command *cmd,
			struct nvme_iod *iod, int total_len, gfp_t gfp);
struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write,
				unsigned long addr, unsigned length);
void nvme_unmap_user_pages(struct nvme_dev *dev, int write,
			struct nvme_iod *iod);
struct nvme_queue *get_nvmeq(struct nvme_dev *dev);
void put_nvmeq(struct nvme_queue *nvmeq);
int nvme_submit_sync_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd,
						u32 *result, unsigned timeout);
int nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns);
int nvme_submit_admin_cmd(struct nvme_dev *, struct nvme_command *,
							u32 *result);
int nvme_identify(struct nvme_dev *, unsigned nsid, unsigned cns,
							dma_addr_t dma_addr);
int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
			dma_addr_t dma_addr, u32 *result);
int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
			dma_addr_t dma_addr, u32 *result);

struct sg_io_hdr;

int nvme_sg_io(struct nvme_ns *ns, struct sg_io_hdr __user *u_hdr);
int nvme_sg_get_version_num(int __user *ip);

#endif

#endif /* _LINUX_NVME_H */
Commit	Line	Data
b60503ba MW	1	/*
	2	* Definitions for the NVM Express interface
	3	* Copyright (c) 2011, Intel Corporation.
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms and conditions of the GNU General Public License,
	7	* version 2, as published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along with
	15	* this program; if not, write to the Free Software Foundation, Inc.,
	16	* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
	17	*/
	18
	19	#ifndef _LINUX_NVME_H
	20	#define _LINUX_NVME_H
	21
	22	#include <linux/types.h>
	23
	24	struct nvme_bar {
	25	__u64 cap; /* Controller Capabilities */
	26	__u32 vs; /* Version */
897cfe1c MW	27	__u32 intms; /* Interrupt Mask Set */
897cfe1c MW	28	__u32 intmc; /* Interrupt Mask Clear */
b60503ba	29	__u32 cc; /* Controller Configuration */
897cfe1c	30	__u32 rsvd1; /* Reserved */
b60503ba	31	__u32 csts; /* Controller Status */
897cfe1c	32	__u32 rsvd2; /* Reserved */
b60503ba MW	33	__u32 aqa; /* Admin Queue Attributes */
	34	__u64 asq; /* Admin SQ Base Address */
	35	__u64 acq; /* Admin CQ Base Address */
	36	};
	37
a0cadb85	38	#define NVME_CAP_MQES(cap) ((cap) & 0xffff)
22605f96	39	#define NVME_CAP_TIMEOUT(cap) (((cap) >> 24) & 0xff)
f1938f6e	40	#define NVME_CAP_STRIDE(cap) (((cap) >> 32) & 0xf)
8fc23e03	41	#define NVME_CAP_MPSMIN(cap) (((cap) >> 48) & 0xf)
22605f96	42
b60503ba MW	43	enum {
	44	NVME_CC_ENABLE = 1 << 0,
	45	NVME_CC_CSS_NVM = 0 << 4,
	46	NVME_CC_MPS_SHIFT = 7,
	47	NVME_CC_ARB_RR = 0 << 11,
	48	NVME_CC_ARB_WRRU = 1 << 11,
7f53f9d2 MW	49	NVME_CC_ARB_VS = 7 << 11,
	50	NVME_CC_SHN_NONE = 0 << 14,
	51	NVME_CC_SHN_NORMAL = 1 << 14,
	52	NVME_CC_SHN_ABRUPT = 2 << 14,
	53	NVME_CC_IOSQES = 6 << 16,
	54	NVME_CC_IOCQES = 4 << 20,
b60503ba MW	55	NVME_CSTS_RDY = 1 << 0,
	56	NVME_CSTS_CFS = 1 << 1,
	57	NVME_CSTS_SHST_NORMAL = 0 << 2,
	58	NVME_CSTS_SHST_OCCUR = 1 << 2,
	59	NVME_CSTS_SHST_CMPLT = 2 << 2,
	60	};
	61
010e646b MW	62	struct nvme_id_power_state {
	63	__le16 max_power; /* centiwatts */
	64	__u16 rsvd2;
	65	__le32 entry_lat; /* microseconds */
	66	__le32 exit_lat; /* microseconds */
	67	__u8 read_tput;
	68	__u8 read_lat;
	69	__u8 write_tput;
	70	__u8 write_lat;
	71	__u8 rsvd16[16];
	72	};
	73
b60503ba MW	74	#define NVME_VS(major, minor) (major << 16 \| minor)
	75
	76	struct nvme_id_ctrl {
	77	__le16 vid;
	78	__le16 ssvid;
	79	char sn[20];
	80	char mn[40];
	81	char fr[8];
b60503ba	82	__u8 rab;
010e646b MW	83	__u8 ieee[3];
	84	__u8 mic;
	85	__u8 mdts;
	86	__u8 rsvd78[178];
b60503ba MW	87	__le16 oacs;
	88	__u8 acl;
	89	__u8 aerl;
	90	__u8 frmw;
	91	__u8 lpa;
	92	__u8 elpe;
	93	__u8 npss;
	94	__u8 rsvd264[248];
010e646b MW	95	__u8 sqes;
	96	__u8 cqes;
	97	__u8 rsvd514[2];
	98	__le32 nn;
b60503ba MW	99	__le16 oncs;
	100	__le16 fuses;
	101	__u8 fna;
	102	__u8 vwc;
	103	__le16 awun;
	104	__le16 awupf;
010e646b MW	105	__u8 rsvd530[1518];
010e646b MW	106	struct nvme_id_power_state psd[32];
b60503ba MW	107	__u8 vs[1024];
	108	};
	109
0e5e4f0e KB	110	enum {
	111	NVME_CTRL_ONCS_COMPARE = 1 << 0,
	112	NVME_CTRL_ONCS_WRITE_UNCORRECTABLE = 1 << 1,
	113	NVME_CTRL_ONCS_DSM = 1 << 2,
	114	};
	115
b60503ba MW	116	struct nvme_lbaf {
	117	__le16 ms;
	118	__u8 ds;
	119	__u8 rp;
	120	};
	121
	122	struct nvme_id_ns {
	123	__le64 nsze;
	124	__le64 ncap;
	125	__le64 nuse;
	126	__u8 nsfeat;
	127	__u8 nlbaf;
	128	__u8 flbas;
	129	__u8 mc;
	130	__u8 dpc;
	131	__u8 dps;
	132	__u8 rsvd30[98];
	133	struct nvme_lbaf lbaf[16];
	134	__u8 rsvd192[192];
	135	__u8 vs[3712];
	136	};
	137
	138	enum {
	139	NVME_NS_FEAT_THIN = 1 << 0,
	140	NVME_LBAF_RP_BEST = 0,
	141	NVME_LBAF_RP_BETTER = 1,
	142	NVME_LBAF_RP_GOOD = 2,
	143	NVME_LBAF_RP_DEGRADED = 3,
	144	};
	145
6ecec745 KB	146	struct nvme_smart_log {
	147	__u8 critical_warning;
	148	__u8 temperature[2];
	149	__u8 avail_spare;
	150	__u8 spare_thresh;
	151	__u8 percent_used;
	152	__u8 rsvd6[26];
	153	__u8 data_units_read[16];
	154	__u8 data_units_written[16];
	155	__u8 host_reads[16];
	156	__u8 host_writes[16];
	157	__u8 ctrl_busy_time[16];
	158	__u8 power_cycles[16];
	159	__u8 power_on_hours[16];
	160	__u8 unsafe_shutdowns[16];
	161	__u8 media_errors[16];
	162	__u8 num_err_log_entries[16];
	163	__u8 rsvd192[320];
	164	};
	165
	166	enum {
	167	NVME_SMART_CRIT_SPARE = 1 << 0,
	168	NVME_SMART_CRIT_TEMPERATURE = 1 << 1,
	169	NVME_SMART_CRIT_RELIABILITY = 1 << 2,
	170	NVME_SMART_CRIT_MEDIA = 1 << 3,
	171	NVME_SMART_CRIT_VOLATILE_MEMORY = 1 << 4,
	172	};
	173
b60503ba MW	174	struct nvme_lba_range_type {
	175	__u8 type;
	176	__u8 attributes;
	177	__u8 rsvd2[14];
	178	__u64 slba;
	179	__u64 nlb;
	180	__u8 guid[16];
	181	__u8 rsvd48[16];
	182	};
	183
	184	enum {
	185	NVME_LBART_TYPE_FS = 0x01,
	186	NVME_LBART_TYPE_RAID = 0x02,
	187	NVME_LBART_TYPE_CACHE = 0x03,
	188	NVME_LBART_TYPE_SWAP = 0x04,
	189
	190	NVME_LBART_ATTRIB_TEMP = 1 << 0,
	191	NVME_LBART_ATTRIB_HIDE = 1 << 1,
	192	};
	193
	194	/* I/O commands */
	195
	196	enum nvme_opcode {
	197	nvme_cmd_flush = 0x00,
	198	nvme_cmd_write = 0x01,
	199	nvme_cmd_read = 0x02,
	200	nvme_cmd_write_uncor = 0x04,
	201	nvme_cmd_compare = 0x05,
	202	nvme_cmd_dsm = 0x09,
	203	};
	204
7b4fe9b1 MW	205	struct nvme_common_command {
	206	__u8 opcode;
	207	__u8 flags;
	208	__u16 command_id;
	209	__le32 nsid;
1c9b5265	210	__le32 cdw2[2];
7b4fe9b1 MW	211	__le64 metadata;
	212	__le64 prp1;
	213	__le64 prp2;
1c9b5265	214	__le32 cdw10[6];
7b4fe9b1 MW	215	};
7b4fe9b1 MW	216
b60503ba MW	217	struct nvme_rw_command {
	218	__u8 opcode;
	219	__u8 flags;
	220	__u16 command_id;
	221	__le32 nsid;
	222	__u64 rsvd2;
	223	__le64 metadata;
	224	__le64 prp1;
	225	__le64 prp2;
	226	__le64 slba;
	227	__le16 length;
	228	__le16 control;
	229	__le32 dsmgmt;
	230	__le32 reftag;
	231	__le16 apptag;
	232	__le16 appmask;
	233	};
	234
	235	enum {
	236	NVME_RW_LR = 1 << 15,
	237	NVME_RW_FUA = 1 << 14,
	238	NVME_RW_DSM_FREQ_UNSPEC = 0,
	239	NVME_RW_DSM_FREQ_TYPICAL = 1,
	240	NVME_RW_DSM_FREQ_RARE = 2,
	241	NVME_RW_DSM_FREQ_READS = 3,
	242	NVME_RW_DSM_FREQ_WRITES = 4,
	243	NVME_RW_DSM_FREQ_RW = 5,
	244	NVME_RW_DSM_FREQ_ONCE = 6,
	245	NVME_RW_DSM_FREQ_PREFETCH = 7,
	246	NVME_RW_DSM_FREQ_TEMP = 8,
	247	NVME_RW_DSM_LATENCY_NONE = 0 << 4,
	248	NVME_RW_DSM_LATENCY_IDLE = 1 << 4,
	249	NVME_RW_DSM_LATENCY_NORM = 2 << 4,
	250	NVME_RW_DSM_LATENCY_LOW = 3 << 4,
	251	NVME_RW_DSM_SEQ_REQ = 1 << 6,
	252	NVME_RW_DSM_COMPRESSED = 1 << 7,
	253	};
	254
0e5e4f0e KB	255	struct nvme_dsm_cmd {
	256	__u8 opcode;
	257	__u8 flags;
	258	__u16 command_id;
	259	__le32 nsid;
	260	__u64 rsvd2[2];
	261	__le64 prp1;
	262	__le64 prp2;
	263	__le32 nr;
	264	__le32 attributes;
	265	__u32 rsvd12[4];
	266	};
	267
	268	enum {
	269	NVME_DSMGMT_IDR = 1 << 0,
	270	NVME_DSMGMT_IDW = 1 << 1,
	271	NVME_DSMGMT_AD = 1 << 2,
	272	};
	273
	274	struct nvme_dsm_range {
	275	__le32 cattr;
	276	__le32 nlb;
	277	__le64 slba;
	278	};
	279
b60503ba MW	280	/* Admin commands */
	281
	282	enum nvme_admin_opcode {
	283	nvme_admin_delete_sq = 0x00,
	284	nvme_admin_create_sq = 0x01,
2ddc4f74	285	nvme_admin_get_log_page = 0x02,
b60503ba MW	286	nvme_admin_delete_cq = 0x04,
	287	nvme_admin_create_cq = 0x05,
	288	nvme_admin_identify = 0x06,
	289	nvme_admin_abort_cmd = 0x08,
	290	nvme_admin_set_features = 0x09,
2ddc4f74	291	nvme_admin_get_features = 0x0a,
b60503ba	292	nvme_admin_async_event = 0x0c,
2ddc4f74 KW	293	nvme_admin_activate_fw = 0x10,
	294	nvme_admin_download_fw = 0x11,
	295	nvme_admin_format_nvm = 0x80,
	296	nvme_admin_security_send = 0x81,
	297	nvme_admin_security_recv = 0x82,
b60503ba MW	298	};
	299
	300	enum {
	301	NVME_QUEUE_PHYS_CONTIG = (1 << 0),
	302	NVME_CQ_IRQ_ENABLED = (1 << 1),
	303	NVME_SQ_PRIO_URGENT = (0 << 1),
	304	NVME_SQ_PRIO_HIGH = (1 << 1),
	305	NVME_SQ_PRIO_MEDIUM = (2 << 1),
	306	NVME_SQ_PRIO_LOW = (3 << 1),
	307	NVME_FEAT_ARBITRATION = 0x01,
	308	NVME_FEAT_POWER_MGMT = 0x02,
	309	NVME_FEAT_LBA_RANGE = 0x03,
	310	NVME_FEAT_TEMP_THRESH = 0x04,
	311	NVME_FEAT_ERR_RECOVERY = 0x05,
	312	NVME_FEAT_VOLATILE_WC = 0x06,
	313	NVME_FEAT_NUM_QUEUES = 0x07,
	314	NVME_FEAT_IRQ_COALESCE = 0x08,
	315	NVME_FEAT_IRQ_CONFIG = 0x09,
	316	NVME_FEAT_WRITE_ATOMIC = 0x0a,
	317	NVME_FEAT_ASYNC_EVENT = 0x0b,
	318	NVME_FEAT_SW_PROGRESS = 0x0c,
	319	};
	320
	321	struct nvme_identify {
	322	__u8 opcode;
	323	__u8 flags;
	324	__u16 command_id;
	325	__le32 nsid;
	326	__u64 rsvd2[2];
	327	__le64 prp1;
	328	__le64 prp2;
	329	__le32 cns;
	330	__u32 rsvd11[5];
	331	};
	332
	333	struct nvme_features {
	334	__u8 opcode;
	335	__u8 flags;
	336	__u16 command_id;
	337	__le32 nsid;
	338	__u64 rsvd2[2];
	339	__le64 prp1;
	340	__le64 prp2;
	341	__le32 fid;
	342	__le32 dword11;
	343	__u32 rsvd12[4];
	344	};
	345
	346	struct nvme_create_cq {
	347	__u8 opcode;
	348	__u8 flags;
	349	__u16 command_id;
6ee44cdc	350	__u32 rsvd1[5];
b60503ba MW	351	__le64 prp1;
	352	__u64 rsvd8;
	353	__le16 cqid;
	354	__le16 qsize;
	355	__le16 cq_flags;
	356	__le16 irq_vector;
	357	__u32 rsvd12[4];
	358	};
	359
	360	struct nvme_create_sq {
	361	__u8 opcode;
	362	__u8 flags;
	363	__u16 command_id;
6ee44cdc	364	__u32 rsvd1[5];
b60503ba MW	365	__le64 prp1;
	366	__u64 rsvd8;
	367	__le16 sqid;
	368	__le16 qsize;
	369	__le16 sq_flags;
	370	__le16 cqid;
6ee44cdc	371	__u32 rsvd12[4];
b60503ba MW	372	};
	373
	374	struct nvme_delete_queue {
	375	__u8 opcode;
	376	__u8 flags;
	377	__u16 command_id;
	378	__u32 rsvd1[9];
	379	__le16 qid;
6ee44cdc MW	380	__u16 rsvd10;
	381	__u32 rsvd11[5];
	382	};
	383
	384	struct nvme_download_firmware {
	385	__u8 opcode;
	386	__u8 flags;
	387	__u16 command_id;
	388	__u32 rsvd1[5];
	389	__le64 prp1;
	390	__le64 prp2;
	391	__le32 numd;
	392	__le32 offset;
	393	__u32 rsvd12[4];
b60503ba MW	394	};
b60503ba MW	395
f8ebf840 VV	396	struct nvme_format_cmd {
	397	__u8 opcode;
	398	__u8 flags;
	399	__u16 command_id;
	400	__le32 nsid;
	401	__u64 rsvd2[4];
	402	__le32 cdw10;
	403	__u32 rsvd11[5];
	404	};
	405
b60503ba MW	406	struct nvme_command {
	407	union {
	408	struct nvme_common_command common;
	409	struct nvme_rw_command rw;
	410	struct nvme_identify identify;
	411	struct nvme_features features;
	412	struct nvme_create_cq create_cq;
	413	struct nvme_create_sq create_sq;
	414	struct nvme_delete_queue delete_queue;
6ee44cdc	415	struct nvme_download_firmware dlfw;
f8ebf840	416	struct nvme_format_cmd format;
0e5e4f0e	417	struct nvme_dsm_cmd dsm;
b60503ba MW	418	};
	419	};
	420
b60503ba MW	421	enum {
	422	NVME_SC_SUCCESS = 0x0,
	423	NVME_SC_INVALID_OPCODE = 0x1,
	424	NVME_SC_INVALID_FIELD = 0x2,
	425	NVME_SC_CMDID_CONFLICT = 0x3,
	426	NVME_SC_DATA_XFER_ERROR = 0x4,
	427	NVME_SC_POWER_LOSS = 0x5,
	428	NVME_SC_INTERNAL = 0x6,
	429	NVME_SC_ABORT_REQ = 0x7,
	430	NVME_SC_ABORT_QUEUE = 0x8,
	431	NVME_SC_FUSED_FAIL = 0x9,
	432	NVME_SC_FUSED_MISSING = 0xa,
7a63e07b	433	NVME_SC_INVALID_NS = 0xb,
f8ebf840	434	NVME_SC_CMD_SEQ_ERROR = 0xc,
b60503ba MW	435	NVME_SC_LBA_RANGE = 0x80,
	436	NVME_SC_CAP_EXCEEDED = 0x81,
	437	NVME_SC_NS_NOT_READY = 0x82,
	438	NVME_SC_CQ_INVALID = 0x100,
	439	NVME_SC_QID_INVALID = 0x101,
	440	NVME_SC_QUEUE_SIZE = 0x102,
7a63e07b MW	441	NVME_SC_ABORT_LIMIT = 0x103,
	442	NVME_SC_ABORT_MISSING = 0x104,
	443	NVME_SC_ASYNC_LIMIT = 0x105,
	444	NVME_SC_FIRMWARE_SLOT = 0x106,
	445	NVME_SC_FIRMWARE_IMAGE = 0x107,
	446	NVME_SC_INVALID_VECTOR = 0x108,
	447	NVME_SC_INVALID_LOG_PAGE = 0x109,
	448	NVME_SC_INVALID_FORMAT = 0x10a,
	449	NVME_SC_BAD_ATTRIBUTES = 0x180,
b60503ba MW	450	NVME_SC_WRITE_FAULT = 0x280,
b60503ba MW	451	NVME_SC_READ_ERROR = 0x281,
7a63e07b MW	452	NVME_SC_GUARD_CHECK = 0x282,
	453	NVME_SC_APPTAG_CHECK = 0x283,
	454	NVME_SC_REFTAG_CHECK = 0x284,
	455	NVME_SC_COMPARE_FAILED = 0x285,
	456	NVME_SC_ACCESS_DENIED = 0x286,
b60503ba MW	457	};
	458
	459	struct nvme_completion {
	460	__le32 result; /* Used by admin commands to return data */
6ee44cdc	461	__u32 rsvd;
b60503ba MW	462	__le16 sq_head; /* how much of this queue may be reclaimed */
	463	__le16 sq_id; /* submission queue that generated this entry */
	464	__u16 command_id; /* of the command which completed */
	465	__le16 status; /* did the command fail, and if so, why? */
	466	};
	467
a53295b6 MW	468	struct nvme_user_io {
	469	__u8 opcode;
	470	__u8 flags;
	471	__u16 control;
6c7d4945 MW	472	__u16 nblocks;
6c7d4945 MW	473	__u16 rsvd;
a53295b6 MW	474	__u64 metadata;
	475	__u64 addr;
	476	__u64 slba;
a53295b6 MW	477	__u32 dsmgmt;
	478	__u32 reftag;
	479	__u16 apptag;
	480	__u16 appmask;
a53295b6 MW	481	};
a53295b6 MW	482
6bbf1acd MW	483	struct nvme_admin_cmd {
	484	__u8 opcode;
	485	__u8 flags;
	486	__u16 rsvd1;
	487	__u32 nsid;
	488	__u32 cdw2;
	489	__u32 cdw3;
	490	__u64 metadata;
6ee44cdc	491	__u64 addr;
6bbf1acd MW	492	__u32 metadata_len;
	493	__u32 data_len;
	494	__u32 cdw10;
	495	__u32 cdw11;
	496	__u32 cdw12;
	497	__u32 cdw13;
	498	__u32 cdw14;
	499	__u32 cdw15;
	500	__u32 timeout_ms;
	501	__u32 result;
6ee44cdc MW	502	};
6ee44cdc MW	503
6bbf1acd MW	504	#define NVME_IOCTL_ID _IO('N', 0x40)
	505	#define NVME_IOCTL_ADMIN_CMD _IOWR('N', 0x41, struct nvme_admin_cmd)
	506	#define NVME_IOCTL_SUBMIT_IO _IOW('N', 0x42, struct nvme_user_io)
b60503ba	507
13c3b0fc VV	508	#ifdef __KERNEL__
13c3b0fc VV	509	#include <linux/pci.h>
5e82e952 KB	510	#include <linux/miscdevice.h>
5e82e952 KB	511	#include <linux/kref.h>
13c3b0fc VV	512
	513	#define NVME_IO_TIMEOUT (5 * HZ)
	514
	515	/*
	516	* Represents an NVM Express device. Each nvme_dev is a PCI function.
	517	*/
	518	struct nvme_dev {
	519	struct list_head node;
	520	struct nvme_queue **queues;
	521	u32 __iomem *dbs;
	522	struct pci_dev *pci_dev;
	523	struct dma_pool *prp_page_pool;
	524	struct dma_pool *prp_small_pool;
	525	int instance;
	526	int queue_count;
	527	int db_stride;
	528	u32 ctrl_config;
	529	struct msix_entry *entry;
	530	struct nvme_bar __iomem *bar;
	531	struct list_head namespaces;
5e82e952 KB	532	struct kref kref;
	533	struct miscdevice miscdev;
	534	char name[12];
13c3b0fc VV	535	char serial[20];
	536	char model[40];
	537	char firmware_rev[8];
	538	u32 max_hw_sectors;
159b67d7	539	u32 stripe_size;
13c3b0fc VV	540	u16 oncs;
	541	};
	542
	543	/*
	544	* An NVM Express namespace is equivalent to a SCSI LUN
	545	*/
	546	struct nvme_ns {
	547	struct list_head list;
	548
	549	struct nvme_dev *dev;
	550	struct request_queue *queue;
	551	struct gendisk *disk;
	552
	553	int ns_id;
	554	int lba_shift;
f410c680	555	int ms;
5d0f6131 VV	556	u64 mode_select_num_blocks;
5d0f6131 VV	557	u32 mode_select_block_len;
13c3b0fc VV	558	};
	559
	560	/*
	561	* The nvme_iod describes the data in an I/O, including the list of PRP
	562	* entries. You can't see it in this data structure because C doesn't let
	563	* me express that. Use nvme_alloc_iod to ensure there's enough space
	564	* allocated to store the PRP list.
	565	*/
	566	struct nvme_iod {
	567	void private; / For the use of the submitter of the I/O */
	568	int npages; /* In the PRP list. 0 means small pool in use */
	569	int offset; /* Of PRP list */
	570	int nents; /* Used in scatterlist */
	571	int length; /* Of data, in bytes */
	572	dma_addr_t first_dma;
	573	struct scatterlist sg[0];
	574	};
5d0f6131	575
063cc6d5 MW	576	static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector)
	577	{
	578	return (sector >> (ns->lba_shift - 9));
	579	}
	580
5d0f6131 VV	581	/**
	582	* nvme_free_iod - frees an nvme_iod
	583	* @dev: The device that the I/O was submitted to
	584	* @iod: The memory to free
	585	*/
	586	void nvme_free_iod(struct nvme_dev dev, struct nvme_iod iod);
	587
	588	int nvme_setup_prps(struct nvme_dev dev, struct nvme_common_command cmd,
	589	struct nvme_iod *iod, int total_len, gfp_t gfp);
	590	struct nvme_iod nvme_map_user_pages(struct nvme_dev dev, int write,
	591	unsigned long addr, unsigned length);
	592	void nvme_unmap_user_pages(struct nvme_dev *dev, int write,
	593	struct nvme_iod *iod);
	594	struct nvme_queue get_nvmeq(struct nvme_dev dev);
	595	void put_nvmeq(struct nvme_queue *nvmeq);
	596	int nvme_submit_sync_cmd(struct nvme_queue nvmeq, struct nvme_command cmd,
	597	u32 *result, unsigned timeout);
	598	int nvme_submit_flush_data(struct nvme_queue nvmeq, struct nvme_ns ns);
	599	int nvme_submit_admin_cmd(struct nvme_dev , struct nvme_command ,
	600	u32 *result);
	601	int nvme_identify(struct nvme_dev *, unsigned nsid, unsigned cns,
	602	dma_addr_t dma_addr);
	603	int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
	604	dma_addr_t dma_addr, u32 *result);
	605	int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
	606	dma_addr_t dma_addr, u32 *result);
	607
	608	struct sg_io_hdr;
	609
	610	int nvme_sg_io(struct nvme_ns ns, struct sg_io_hdr __user u_hdr);
	611	int nvme_sg_get_version_num(int __user *ip);
	612
13c3b0fc VV	613	#endif
13c3b0fc VV	614
b60503ba	615	#endif /* _LINUX_NVME_H */