[mirror_ubuntu-bionic-kernel.git] / drivers / nvme / host / nvme.h

/*
 * Copyright (c) 2011-2014, 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.
 */

#ifndef _NVME_H
#define _NVME_H

#include <linux/nvme.h>
#include <linux/pci.h>
#include <linux/kref.h>
#include <linux/blk-mq.h>
#include <linux/lightnvm.h>

enum {
	/*
	 * Driver internal status code for commands that were cancelled due
	 * to timeouts or controller shutdown.  The value is negative so
	 * that it a) doesn't overlap with the unsigned hardware error codes,
	 * and b) can easily be tested for.
	 */
	NVME_SC_CANCELLED		= -EINTR,
};

extern unsigned char nvme_io_timeout;
#define NVME_IO_TIMEOUT	(nvme_io_timeout * HZ)

extern unsigned char admin_timeout;
#define ADMIN_TIMEOUT	(admin_timeout * HZ)

extern unsigned char shutdown_timeout;
#define SHUTDOWN_TIMEOUT	(shutdown_timeout * HZ)

#define NVME_DEFAULT_KATO	5
#define NVME_KATO_GRACE		10

extern unsigned int nvme_max_retries;

enum {
	NVME_NS_LBA		= 0,
	NVME_NS_LIGHTNVM	= 1,
};

/*
 * List of workarounds for devices that required behavior not specified in
 * the standard.
 */
enum nvme_quirks {
	/*
	 * Prefers I/O aligned to a stripe size specified in a vendor
	 * specific Identify field.
	 */
	NVME_QUIRK_STRIPE_SIZE			= (1 << 0),

	/*
	 * The controller doesn't handle Identify value others than 0 or 1
	 * correctly.
	 */
	NVME_QUIRK_IDENTIFY_CNS			= (1 << 1),

	/*
	 * The controller deterministically returns O's on reads to discarded
	 * logical blocks.
	 */
	NVME_QUIRK_DISCARD_ZEROES		= (1 << 2),

	/*
	 * The controller needs a delay before starts checking the device
	 * readiness, which is done by reading the NVME_CSTS_RDY bit.
	 */
	NVME_QUIRK_DELAY_BEFORE_CHK_RDY		= (1 << 3),
};

/*
 * Common request structure for NVMe passthrough.  All drivers must have
 * this structure as the first member of their request-private data.
 */
struct nvme_request {
	struct nvme_command	*cmd;
	union nvme_result	result;
};

static inline struct nvme_request *nvme_req(struct request *req)
{
	return blk_mq_rq_to_pdu(req);
}

/* The below value is the specific amount of delay needed before checking
 * readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the
 * NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was
 * found empirically.
 */
#define NVME_QUIRK_DELAY_AMOUNT		2000

enum nvme_ctrl_state {
	NVME_CTRL_NEW,
	NVME_CTRL_LIVE,
	NVME_CTRL_RESETTING,
	NVME_CTRL_RECONNECTING,
	NVME_CTRL_DELETING,
	NVME_CTRL_DEAD,
};

struct nvme_ctrl {
	enum nvme_ctrl_state state;
	spinlock_t lock;
	const struct nvme_ctrl_ops *ops;
	struct request_queue *admin_q;
	struct request_queue *connect_q;
	struct device *dev;
	struct kref kref;
	int instance;
	struct blk_mq_tag_set *tagset;
	struct list_head namespaces;
	struct mutex namespaces_mutex;
	struct device *device;	/* char device */
	struct list_head node;
	struct ida ns_ida;

	char name[12];
	char serial[20];
	char model[40];
	char firmware_rev[8];
	u16 cntlid;

	u32 ctrl_config;

	u32 page_size;
	u32 max_hw_sectors;
	u32 stripe_size;
	u16 oncs;
	u16 vid;
	atomic_t abort_limit;
	u8 event_limit;
	u8 vwc;
	u32 vs;
	u32 sgls;
	u16 kas;
	unsigned int kato;
	bool subsystem;
	unsigned long quirks;
	struct work_struct scan_work;
	struct work_struct async_event_work;
	struct delayed_work ka_work;

	/* Fabrics only */
	u16 sqsize;
	u32 ioccsz;
	u32 iorcsz;
	u16 icdoff;
	u16 maxcmd;
	struct nvmf_ctrl_options *opts;
};

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

	struct nvme_ctrl *ctrl;
	struct request_queue *queue;
	struct gendisk *disk;
	struct nvm_dev *ndev;
	struct kref kref;
	int instance;

	u8 eui[8];
	u8 uuid[16];

	unsigned ns_id;
	int lba_shift;
	u16 ms;
	bool ext;
	u8 pi_type;
	unsigned long flags;

#define NVME_NS_REMOVING 0
#define NVME_NS_DEAD     1

	u64 mode_select_num_blocks;
	u32 mode_select_block_len;
};

struct nvme_ctrl_ops {
	const char *name;
	struct module *module;
	bool is_fabrics;
	int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
	int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);
	int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);
	int (*reset_ctrl)(struct nvme_ctrl *ctrl);
	void (*free_ctrl)(struct nvme_ctrl *ctrl);
	void (*submit_async_event)(struct nvme_ctrl *ctrl, int aer_idx);
	int (*delete_ctrl)(struct nvme_ctrl *ctrl);
	const char *(*get_subsysnqn)(struct nvme_ctrl *ctrl);
	int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
};

static inline bool nvme_ctrl_ready(struct nvme_ctrl *ctrl)
{
	u32 val = 0;

	if (ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &val))
		return false;
	return val & NVME_CSTS_RDY;
}

static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)
{
	if (!ctrl->subsystem)
		return -ENOTTY;
	return ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);
}

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

static inline unsigned nvme_map_len(struct request *rq)
{
	if (req_op(rq) == REQ_OP_DISCARD)
		return sizeof(struct nvme_dsm_range);
	else
		return blk_rq_bytes(rq);
}

static inline void nvme_cleanup_cmd(struct request *req)
{
	if (req_op(req) == REQ_OP_DISCARD)
		kfree(req->completion_data);
}

static inline int nvme_error_status(u16 status)
{
	switch (status & 0x7ff) {
	case NVME_SC_SUCCESS:
		return 0;
	case NVME_SC_CAP_EXCEEDED:
		return -ENOSPC;
	default:
		return -EIO;
	}
}

static inline bool nvme_req_needs_retry(struct request *req, u16 status)
{
	return !(status & NVME_SC_DNR || blk_noretry_request(req)) &&
		(jiffies - req->start_time) < req->timeout &&
		req->retries < nvme_max_retries;
}

void nvme_cancel_request(struct request *req, void *data, bool reserved);
bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
		enum nvme_ctrl_state new_state);
int nvme_disable_ctrl(struct nvme_ctrl *ctrl, u64 cap);
int nvme_enable_ctrl(struct nvme_ctrl *ctrl, u64 cap);
int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl);
int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
		const struct nvme_ctrl_ops *ops, unsigned long quirks);
void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);
void nvme_put_ctrl(struct nvme_ctrl *ctrl);
int nvme_init_identify(struct nvme_ctrl *ctrl);

void nvme_queue_scan(struct nvme_ctrl *ctrl);
void nvme_remove_namespaces(struct nvme_ctrl *ctrl);

#define NVME_NR_AERS	1
void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
		union nvme_result *res);
void nvme_queue_async_events(struct nvme_ctrl *ctrl);

void nvme_stop_queues(struct nvme_ctrl *ctrl);
void nvme_start_queues(struct nvme_ctrl *ctrl);
void nvme_kill_queues(struct nvme_ctrl *ctrl);

#define NVME_QID_ANY -1
struct request *nvme_alloc_request(struct request_queue *q,
		struct nvme_command *cmd, unsigned int flags, int qid);
void nvme_requeue_req(struct request *req);
int nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
		struct nvme_command *cmd);
int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
		void *buf, unsigned bufflen);
int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
		union nvme_result *result, void *buffer, unsigned bufflen,
		unsigned timeout, int qid, int at_head, int flags);
int nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd,
		void __user *ubuffer, unsigned bufflen, u32 *result,
		unsigned timeout);
int __nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd,
		void __user *ubuffer, unsigned bufflen,
		void __user *meta_buffer, unsigned meta_len, u32 meta_seed,
		u32 *result, unsigned timeout);
int nvme_identify_ctrl(struct nvme_ctrl *dev, struct nvme_id_ctrl **id);
int nvme_identify_ns(struct nvme_ctrl *dev, unsigned nsid,
		struct nvme_id_ns **id);
int nvme_get_log_page(struct nvme_ctrl *dev, struct nvme_smart_log **log);
int nvme_get_features(struct nvme_ctrl *dev, unsigned fid, unsigned nsid,
		      void *buffer, size_t buflen, u32 *result);
int nvme_set_features(struct nvme_ctrl *dev, unsigned fid, unsigned dword11,
		      void *buffer, size_t buflen, u32 *result);
int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
void nvme_start_keep_alive(struct nvme_ctrl *ctrl);
void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);

struct sg_io_hdr;

int nvme_sg_io(struct nvme_ns *ns, struct sg_io_hdr __user *u_hdr);
int nvme_sg_io32(struct nvme_ns *ns, unsigned long arg);
int nvme_sg_get_version_num(int __user *ip);

#ifdef CONFIG_NVM
int nvme_nvm_ns_supported(struct nvme_ns *ns, struct nvme_id_ns *id);
int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node);
void nvme_nvm_unregister(struct nvme_ns *ns);
int nvme_nvm_register_sysfs(struct nvme_ns *ns);
void nvme_nvm_unregister_sysfs(struct nvme_ns *ns);
#else
static inline int nvme_nvm_register(struct nvme_ns *ns, char *disk_name,
				    int node)
{
	return 0;
}

static inline void nvme_nvm_unregister(struct nvme_ns *ns) {};
static inline int nvme_nvm_register_sysfs(struct nvme_ns *ns)
{
	return 0;
}
static inline void nvme_nvm_unregister_sysfs(struct nvme_ns *ns) {};
static inline int nvme_nvm_ns_supported(struct nvme_ns *ns, struct nvme_id_ns *id)
{
	return 0;
}
#endif /* CONFIG_NVM */

static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
{
	return dev_to_disk(dev)->private_data;
}

int __init nvme_core_init(void);
void nvme_core_exit(void);

#endif /* _NVME_H */
Commit	Line	Data
f11bb3e2 CH	1	/*
	2	* Copyright (c) 2011-2014, Intel Corporation.
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms and conditions of the GNU General Public License,
	6	* version 2, as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*/
	13
	14	#ifndef _NVME_H
	15	#define _NVME_H
	16
	17	#include <linux/nvme.h>
	18	#include <linux/pci.h>
	19	#include <linux/kref.h>
	20	#include <linux/blk-mq.h>
b0b4e09c	21	#include <linux/lightnvm.h>
f11bb3e2	22
297465c8 CH	23	enum {
	24	/*
	25	* Driver internal status code for commands that were cancelled due
	26	* to timeouts or controller shutdown. The value is negative so
	27	* that it a) doesn't overlap with the unsigned hardware error codes,
	28	* and b) can easily be tested for.
	29	*/
	30	NVME_SC_CANCELLED = -EINTR,
	31	};
	32
f11bb3e2 CH	33	extern unsigned char nvme_io_timeout;
	34	#define NVME_IO_TIMEOUT (nvme_io_timeout * HZ)
	35
21d34711 CH	36	extern unsigned char admin_timeout;
	37	#define ADMIN_TIMEOUT (admin_timeout * HZ)
	38
5fd4ce1b CH	39	extern unsigned char shutdown_timeout;
	40	#define SHUTDOWN_TIMEOUT (shutdown_timeout * HZ)
	41
038bd4cb SG	42	#define NVME_DEFAULT_KATO 5
	43	#define NVME_KATO_GRACE 10
	44
f80ec966 KB	45	extern unsigned int nvme_max_retries;
f80ec966 KB	46
ca064085 MB	47	enum {
	48	NVME_NS_LBA = 0,
	49	NVME_NS_LIGHTNVM = 1,
	50	};
	51
f11bb3e2	52	/*
106198ed CH	53	* List of workarounds for devices that required behavior not specified in
106198ed CH	54	* the standard.
f11bb3e2	55	*/
106198ed CH	56	enum nvme_quirks {
	57	/*
	58	* Prefers I/O aligned to a stripe size specified in a vendor
	59	* specific Identify field.
	60	*/
	61	NVME_QUIRK_STRIPE_SIZE = (1 << 0),
540c801c KB	62
	63	/*
	64	* The controller doesn't handle Identify value others than 0 or 1
	65	* correctly.
	66	*/
	67	NVME_QUIRK_IDENTIFY_CNS = (1 << 1),
08095e70 KB	68
	69	/*
	70	* The controller deterministically returns O's on reads to discarded
	71	* logical blocks.
	72	*/
	73	NVME_QUIRK_DISCARD_ZEROES = (1 << 2),
54adc010 GP	74
	75	/*
	76	* The controller needs a delay before starts checking the device
	77	* readiness, which is done by reading the NVME_CSTS_RDY bit.
	78	*/
	79	NVME_QUIRK_DELAY_BEFORE_CHK_RDY = (1 << 3),
106198ed CH	80	};
106198ed CH	81
d49187e9 CH	82	/*
	83	* Common request structure for NVMe passthrough. All drivers must have
	84	* this structure as the first member of their request-private data.
	85	*/
	86	struct nvme_request {
	87	struct nvme_command *cmd;
	88	union nvme_result result;
	89	};
	90
	91	static inline struct nvme_request nvme_req(struct request req)
	92	{
	93	return blk_mq_rq_to_pdu(req);
	94	}
	95
54adc010 GP	96	/* The below value is the specific amount of delay needed before checking
	97	* readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the
	98	* NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was
	99	* found empirically.
	100	*/
	101	#define NVME_QUIRK_DELAY_AMOUNT 2000
	102
bb8d261e CH	103	enum nvme_ctrl_state {
	104	NVME_CTRL_NEW,
	105	NVME_CTRL_LIVE,
	106	NVME_CTRL_RESETTING,
def61eca	107	NVME_CTRL_RECONNECTING,
bb8d261e	108	NVME_CTRL_DELETING,
0ff9d4e1	109	NVME_CTRL_DEAD,
bb8d261e CH	110	};
bb8d261e CH	111
1c63dc66	112	struct nvme_ctrl {
bb8d261e CH	113	enum nvme_ctrl_state state;
bb8d261e CH	114	spinlock_t lock;
1c63dc66	115	const struct nvme_ctrl_ops *ops;
f11bb3e2	116	struct request_queue *admin_q;
07bfcd09	117	struct request_queue *connect_q;
f11bb3e2	118	struct device *dev;
1673f1f0	119	struct kref kref;
f11bb3e2	120	int instance;
5bae7f73	121	struct blk_mq_tag_set *tagset;
f11bb3e2	122	struct list_head namespaces;
69d3b8ac	123	struct mutex namespaces_mutex;
5bae7f73	124	struct device device; / char device */
f3ca80fc	125	struct list_head node;
075790eb	126	struct ida ns_ida;
1c63dc66	127
f11bb3e2 CH	128	char name[12];
	129	char serial[20];
	130	char model[40];
	131	char firmware_rev[8];
76e3914a	132	u16 cntlid;
5fd4ce1b CH	133
	134	u32 ctrl_config;
	135
	136	u32 page_size;
f11bb3e2 CH	137	u32 max_hw_sectors;
f11bb3e2 CH	138	u32 stripe_size;
f11bb3e2	139	u16 oncs;
118472ab	140	u16 vid;
6bf25d16	141	atomic_t abort_limit;
f11bb3e2 CH	142	u8 event_limit;
f11bb3e2 CH	143	u8 vwc;
f3ca80fc	144	u32 vs;
07bfcd09	145	u32 sgls;
038bd4cb SG	146	u16 kas;
038bd4cb SG	147	unsigned int kato;
f3ca80fc	148	bool subsystem;
106198ed	149	unsigned long quirks;
5955be21	150	struct work_struct scan_work;
f866fc42	151	struct work_struct async_event_work;
038bd4cb	152	struct delayed_work ka_work;
07bfcd09 CH	153
	154	/* Fabrics only */
	155	u16 sqsize;
	156	u32 ioccsz;
	157	u32 iorcsz;
	158	u16 icdoff;
	159	u16 maxcmd;
	160	struct nvmf_ctrl_options *opts;
f11bb3e2 CH	161	};
	162
	163	/*
	164	* An NVM Express namespace is equivalent to a SCSI LUN
	165	*/
	166	struct nvme_ns {
	167	struct list_head list;
	168
1c63dc66	169	struct nvme_ctrl *ctrl;
f11bb3e2 CH	170	struct request_queue *queue;
f11bb3e2 CH	171	struct gendisk *disk;
b0b4e09c	172	struct nvm_dev *ndev;
f11bb3e2	173	struct kref kref;
075790eb	174	int instance;
f11bb3e2	175
2b9b6e86 KB	176	u8 eui[8];
	177	u8 uuid[16];
	178
f11bb3e2 CH	179	unsigned ns_id;
	180	int lba_shift;
	181	u16 ms;
	182	bool ext;
	183	u8 pi_type;
646017a6 KB	184	unsigned long flags;
	185
	186	#define NVME_NS_REMOVING 0
69d9a99c	187	#define NVME_NS_DEAD 1
646017a6	188
f11bb3e2 CH	189	u64 mode_select_num_blocks;
	190	u32 mode_select_block_len;
	191	};
	192
1c63dc66	193	struct nvme_ctrl_ops {
1a353d85	194	const char *name;
e439bb12	195	struct module *module;
07bfcd09	196	bool is_fabrics;
1c63dc66	197	int (reg_read32)(struct nvme_ctrl ctrl, u32 off, u32 *val);
5fd4ce1b	198	int (reg_write32)(struct nvme_ctrl ctrl, u32 off, u32 val);
7fd8930f	199	int (reg_read64)(struct nvme_ctrl ctrl, u32 off, u64 *val);
f3ca80fc	200	int (reset_ctrl)(struct nvme_ctrl ctrl);
1673f1f0	201	void (free_ctrl)(struct nvme_ctrl ctrl);
f866fc42	202	void (submit_async_event)(struct nvme_ctrl ctrl, int aer_idx);
1a353d85 ML	203	int (delete_ctrl)(struct nvme_ctrl ctrl);
	204	const char (get_subsysnqn)(struct nvme_ctrl *ctrl);
	205	int (get_address)(struct nvme_ctrl ctrl, char *buf, int size);
f11bb3e2 CH	206	};
f11bb3e2 CH	207
1c63dc66 CH	208	static inline bool nvme_ctrl_ready(struct nvme_ctrl *ctrl)
	209	{
	210	u32 val = 0;
	211
	212	if (ctrl->ops->reg_read32(ctrl, NVME_REG_CSTS, &val))
	213	return false;
	214	return val & NVME_CSTS_RDY;
	215	}
	216
f3ca80fc CH	217	static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)
	218	{
	219	if (!ctrl->subsystem)
	220	return -ENOTTY;
	221	return ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);
	222	}
	223
f11bb3e2 CH	224	static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector)
	225	{
	226	return (sector >> (ns->lba_shift - 9));
	227	}
	228
58b45602 ML	229	static inline unsigned nvme_map_len(struct request *rq)
58b45602 ML	230	{
c2df40df	231	if (req_op(rq) == REQ_OP_DISCARD)
58b45602 ML	232	return sizeof(struct nvme_dsm_range);
	233	else
	234	return blk_rq_bytes(rq);
	235	}
	236
6904242d ML	237	static inline void nvme_cleanup_cmd(struct request *req)
6904242d ML	238	{
c2df40df	239	if (req_op(req) == REQ_OP_DISCARD)
6904242d ML	240	kfree(req->completion_data);
	241	}
	242
15a190f7 CH	243	static inline int nvme_error_status(u16 status)
	244	{
	245	switch (status & 0x7ff) {
	246	case NVME_SC_SUCCESS:
	247	return 0;
	248	case NVME_SC_CAP_EXCEEDED:
	249	return -ENOSPC;
	250	default:
	251	return -EIO;
	252	}
	253	}
	254
7688faa6 CH	255	static inline bool nvme_req_needs_retry(struct request *req, u16 status)
	256	{
	257	return !(status & NVME_SC_DNR \|\| blk_noretry_request(req)) &&
f80ec966 KB	258	(jiffies - req->start_time) < req->timeout &&
f80ec966 KB	259	req->retries < nvme_max_retries;
7688faa6 CH	260	}
7688faa6 CH	261
c55a2fd4	262	void nvme_cancel_request(struct request req, void data, bool reserved);
bb8d261e CH	263	bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
bb8d261e CH	264	enum nvme_ctrl_state new_state);
5fd4ce1b CH	265	int nvme_disable_ctrl(struct nvme_ctrl *ctrl, u64 cap);
	266	int nvme_enable_ctrl(struct nvme_ctrl *ctrl, u64 cap);
	267	int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl);
f3ca80fc CH	268	int nvme_init_ctrl(struct nvme_ctrl ctrl, struct device dev,
f3ca80fc CH	269	const struct nvme_ctrl_ops *ops, unsigned long quirks);
53029b04	270	void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);
1673f1f0	271	void nvme_put_ctrl(struct nvme_ctrl *ctrl);
7fd8930f	272	int nvme_init_identify(struct nvme_ctrl *ctrl);
5bae7f73	273
5955be21	274	void nvme_queue_scan(struct nvme_ctrl *ctrl);
5bae7f73	275	void nvme_remove_namespaces(struct nvme_ctrl *ctrl);
1673f1f0	276
f866fc42	277	#define NVME_NR_AERS 1
7bf58533 CH	278	void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
7bf58533 CH	279	union nvme_result *res);
f866fc42 CH	280	void nvme_queue_async_events(struct nvme_ctrl *ctrl);
f866fc42 CH	281
25646264 KB	282	void nvme_stop_queues(struct nvme_ctrl *ctrl);
25646264 KB	283	void nvme_start_queues(struct nvme_ctrl *ctrl);
69d9a99c	284	void nvme_kill_queues(struct nvme_ctrl *ctrl);
363c9aac	285
eb71f435	286	#define NVME_QID_ANY -1
4160982e	287	struct request nvme_alloc_request(struct request_queue q,
eb71f435	288	struct nvme_command *cmd, unsigned int flags, int qid);
7688faa6	289	void nvme_requeue_req(struct request *req);
8093f7ca ML	290	int nvme_setup_cmd(struct nvme_ns ns, struct request req,
8093f7ca ML	291	struct nvme_command *cmd);
f11bb3e2 CH	292	int nvme_submit_sync_cmd(struct request_queue q, struct nvme_command cmd,
	293	void *buf, unsigned bufflen);
	294	int __nvme_submit_sync_cmd(struct request_queue q, struct nvme_command cmd,
d49187e9	295	union nvme_result result, void buffer, unsigned bufflen,
eb71f435	296	unsigned timeout, int qid, int at_head, int flags);
4160982e CH	297	int nvme_submit_user_cmd(struct request_queue q, struct nvme_command cmd,
	298	void __user ubuffer, unsigned bufflen, u32 result,
	299	unsigned timeout);
0b7f1f26 KB	300	int __nvme_submit_user_cmd(struct request_queue q, struct nvme_command cmd,
	301	void __user *ubuffer, unsigned bufflen,
	302	void __user *meta_buffer, unsigned meta_len, u32 meta_seed,
f11bb3e2	303	u32 *result, unsigned timeout);
1c63dc66 CH	304	int nvme_identify_ctrl(struct nvme_ctrl dev, struct nvme_id_ctrl *id);
1c63dc66 CH	305	int nvme_identify_ns(struct nvme_ctrl *dev, unsigned nsid,
f11bb3e2	306	struct nvme_id_ns **id);
1c63dc66 CH	307	int nvme_get_log_page(struct nvme_ctrl dev, struct nvme_smart_log *log);
1c63dc66 CH	308	int nvme_get_features(struct nvme_ctrl *dev, unsigned fid, unsigned nsid,
1a6fe74d	309	void buffer, size_t buflen, u32 result);
1c63dc66	310	int nvme_set_features(struct nvme_ctrl *dev, unsigned fid, unsigned dword11,
1a6fe74d	311	void buffer, size_t buflen, u32 result);
9a0be7ab	312	int nvme_set_queue_count(struct nvme_ctrl ctrl, int count);
038bd4cb SG	313	void nvme_start_keep_alive(struct nvme_ctrl *ctrl);
038bd4cb SG	314	void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
f11bb3e2 CH	315
	316	struct sg_io_hdr;
	317
	318	int nvme_sg_io(struct nvme_ns ns, struct sg_io_hdr __user u_hdr);
	319	int nvme_sg_io32(struct nvme_ns *ns, unsigned long arg);
	320	int nvme_sg_get_version_num(int __user *ip);
	321
c4699e70	322	#ifdef CONFIG_NVM
ca064085	323	int nvme_nvm_ns_supported(struct nvme_ns ns, struct nvme_id_ns id);
3dc87dd0	324	int nvme_nvm_register(struct nvme_ns ns, char disk_name, int node);
b0b4e09c	325	void nvme_nvm_unregister(struct nvme_ns *ns);
3dc87dd0 MB	326	int nvme_nvm_register_sysfs(struct nvme_ns *ns);
3dc87dd0 MB	327	void nvme_nvm_unregister_sysfs(struct nvme_ns *ns);
c4699e70	328	#else
b0b4e09c	329	static inline int nvme_nvm_register(struct nvme_ns ns, char disk_name,
3dc87dd0	330	int node)
c4699e70 KB	331	{
	332	return 0;
	333	}
	334
b0b4e09c	335	static inline void nvme_nvm_unregister(struct nvme_ns *ns) {};
3dc87dd0 MB	336	static inline int nvme_nvm_register_sysfs(struct nvme_ns *ns)
	337	{
	338	return 0;
	339	}
	340	static inline void nvme_nvm_unregister_sysfs(struct nvme_ns *ns) {};
c4699e70 KB	341	static inline int nvme_nvm_ns_supported(struct nvme_ns ns, struct nvme_id_ns id)
	342	{
	343	return 0;
	344	}
3dc87dd0 MB	345	#endif /* CONFIG_NVM */
3dc87dd0 MB	346
40267efd SL	347	static inline struct nvme_ns nvme_get_ns_from_dev(struct device dev)
	348	{
	349	return dev_to_disk(dev)->private_data;
	350	}
ca064085	351
5bae7f73 CH	352	int __init nvme_core_init(void);
	353	void nvme_core_exit(void);
	354
f11bb3e2	355	#endif /* _NVME_H */