rte_vdpa.h File Reference

#include <stdint.h>

Go to the source code of this file.

Data Structures
struct	rte_vdpa_stat
struct	rte_vdpa_stat_name

Macros
#define	RTE_VDPA_STATS_NAME_SIZE   64

Functions
struct rte_vdpa_device *	rte_vdpa_find_device_by_name (const char *name)
struct rte_device *	rte_vdpa_get_rte_device (struct rte_vdpa_device *vdpa_dev)
int	rte_vdpa_get_queue_num (struct rte_vdpa_device *dev, uint32_t *queue_num)
int	rte_vdpa_get_features (struct rte_vdpa_device *dev, uint64_t *features)
int	rte_vdpa_get_protocol_features (struct rte_vdpa_device *dev, uint64_t *features)
int	rte_vdpa_relay_vring_used (int vid, uint16_t qid, void *vring_m)
int	rte_vdpa_get_stats_names (struct rte_vdpa_device *dev, struct rte_vdpa_stat_name *stats_names, unsigned int size)
int	rte_vdpa_get_stats (struct rte_vdpa_device *dev, uint16_t qid, struct rte_vdpa_stat *stats, unsigned int n)
int	rte_vdpa_reset_stats (struct rte_vdpa_device *dev, uint16_t qid)

Detailed Description

Device specific vhost lib

Definition in file rte_vdpa.h.

Macro Definition Documentation

#define RTE_VDPA_STATS_NAME_SIZE   64

Maximum name length for statistics counters

Examples:

examples/vdpa/main.c.

Definition at line 17 of file rte_vdpa.h.

Function Documentation

struct rte_vdpa_device* rte_vdpa_find_device_by_name

(

const char *

name

)

Find the device id of a vdpa device from its name

Parameters

name	the vdpa device name

Returns

vDPA device pointer on success, NULL on failure

Examples:

examples/vdpa/main.c.

struct rte_device* rte_vdpa_get_rte_device

(

struct rte_vdpa_device *

vdpa_dev

)

Get the generic device from the vdpa device

Parameters

vdpa_dev

the vdpa device pointer

Returns

generic device pointer on success, NULL on failure

Examples:

examples/vdpa/main.c.

int rte_vdpa_get_queue_num	(	struct rte_vdpa_device *	dev,
		uint32_t *	queue_num
	)

Get number of queue pairs supported by the vDPA device

Parameters

dev	vDP device pointer
queue_num	pointer on where the number of queue is stored

Returns

0 on success, -1 on failure

Examples:

examples/vdpa/main.c.

int rte_vdpa_get_features	(	struct rte_vdpa_device *	dev,
		uint64_t *	features
	)

Get the Virtio features supported by the vDPA device

Parameters

dev	vDP device pointer
features	pointer on where the supported features are stored

Returns

0 on success, -1 on failure

Examples:

examples/vdpa/main.c.

int rte_vdpa_get_protocol_features	(	struct rte_vdpa_device *	dev,
		uint64_t *	features
	)

Get the Vhost-user protocol features supported by the vDPA device

Parameters

dev	vDP device pointer
features	pointer on where the supported protocol features are stored

Returns

0 on success, -1 on failure

int rte_vdpa_relay_vring_used	(	int	vid,
		uint16_t	qid,
		void *	vring_m
	)

Synchronize the used ring from mediated ring to guest, log dirty page for each writeable buffer, caller should handle the used ring logging before device stop.

Parameters

vid	vhost device id
qid	vhost queue id
vring_m	mediated virtio ring pointer

Returns

number of synced used entries on success, -1 on failure

int rte_vdpa_get_stats_names	(	struct rte_vdpa_device *	dev,
		struct rte_vdpa_stat_name *	stats_names,
		unsigned int	size
	)

Retrieve names of statistics of a vDPA device.

There is an assumption that 'stat_names' and 'stats' arrays are matched by array index: stats_names[i].name => stats[i].value

And the array index is same with id field of 'struct rte_vdpa_stat': stats[i].id == i

Parameters

dev	vDPA device pointer
stats_names	array of at least size elements to be filled. If set to NULL, the function returns the required number of elements.
size	The number of elements in stats_names array.

Returns

A negative value on error, otherwise the number of entries filled in the stats name array.

Examples:

examples/vdpa/main.c.

int rte_vdpa_get_stats	(	struct rte_vdpa_device *	dev,
		uint16_t	qid,
		struct rte_vdpa_stat *	stats,
		unsigned int	n
	)

Retrieve statistics of a vDPA device.

There is an assumption that 'stat_names' and 'stats' arrays are matched by array index: stats_names[i].name => stats[i].value

And the array index is same with id field of 'struct rte_vdpa_stat': stats[i].id == i

Parameters

dev	vDPA device pointer
qid	queue id
stats	A pointer to a table of structure of type rte_vdpa_stat to be filled with device statistics ids and values.
n	The number of elements in stats array.

Returns

A negative value on error, otherwise the number of entries filled in the stats table.

Examples:

examples/vdpa/main.c.

int rte_vdpa_reset_stats	(	struct rte_vdpa_device *	dev,
		uint16_t	qid
	)

Reset statistics of a vDPA device.

Parameters

dev	vDPA device pointer
qid	queue id

Returns

0 on success, a negative value on error.