rte_devargs.h File Reference

#include <stdio.h>
#include <sys/queue.h>
#include <rte_compat.h>
#include <rte_bus.h>

Go to the source code of this file.

Data Structures
struct	rte_devargs

Macros
#define	RTE_EAL_DEVARGS_FOREACH(busname, da)

Enumerations
enum	rte_devtype

Functions
int	rte_devargs_parse (struct rte_devargs *da, const char *dev)
int	rte_devargs_parsef (struct rte_devargs *da, const char *format,...)
int	rte_devargs_insert (struct rte_devargs **da)
int	rte_devargs_add (enum rte_devtype devtype, const char *devargs_str)
int	rte_devargs_remove (struct rte_devargs *devargs)
unsigned int	rte_devargs_type_count (enum rte_devtype devtype)
void	rte_devargs_dump (FILE *f)
struct rte_devargs *	rte_devargs_next (const char *busname, const struct rte_devargs *start)

Detailed Description

RTE devargs: list of devices and their user arguments

This file stores a list of devices and their arguments given by the user when a DPDK application is started. These devices can be PCI devices or virtual devices. These devices are stored at startup in a list of rte_devargs structures.

Definition in file rte_devargs.h.

Macro Definition Documentation

RTE_EAL_DEVARGS_FOREACH

#define RTE_EAL_DEVARGS_FOREACH	(		busname,
			da
	)

Value:

for (da = rte_devargs_next(busname, NULL); \
         da != NULL; \
         da = rte_devargs_next(busname, da)) \

Iterate over all rte_devargs for a specific bus.

Definition at line 229 of file rte_devargs.h.

Enumeration Type Documentation

rte_devtype

enum rte_devtype

Type of generic device

Definition at line 31 of file rte_devargs.h.

Function Documentation

rte_devargs_parse()

int rte_devargs_parse	(	struct rte_devargs *	da,
		const char *	dev
	)

Parse a device string.

Verify that a bus is capable of handling the device passed in argument. Store which bus will handle the device, its name and the eventual device parameters.

The syntax is:

bus:device_identifier,arg1=val1,arg2=val2

where "bus:" is the bus name followed by any character separator. The bus name is optional. If no bus name is specified, each bus will attempt to recognize the device identifier. The first one to succeed will be used.

Examples:

pci:0000:05.00.0,arg=val
05.00.0,arg=val
vdev:net_ring0

Parameters

da	The devargs structure holding the device information.
dev	String describing a device.

Returns

• 0 on success.
• Negative errno on error.

rte_devargs_parsef()

int rte_devargs_parsef	(	struct rte_devargs *	da,
		const char *	format,
			...
	)

Parse a device string.

Verify that a bus is capable of handling the device passed in argument. Store which bus will handle the device, its name and the eventual device parameters.

The device string is built with a printf-like syntax.

The syntax is:

bus:device_identifier,arg1=val1,arg2=val2

where "bus:" is the bus name followed by any character separator. The bus name is optional. If no bus name is specified, each bus will attempt to recognize the device identifier. The first one to succeed will be used.

Examples:

pci:0000:05.00.0,arg=val
05.00.0,arg=val
vdev:net_ring0

Parameters

da	The devargs structure holding the device information.
format	Format string describing a device.

Returns

• 0 on success.
• Negative errno on error.

Examples:

examples/multi_process/hotplug_mp/commands.c.

rte_devargs_insert()

int rte_devargs_insert

(

struct rte_devargs **

da

)

Insert an rte_devargs in the global list.

Parameters

da	The devargs structure to insert. If a devargs for the same device is already inserted, it will be updated and returned. It means *da pointer can change.

Returns

• 0 on success
• Negative on error.

rte_devargs_add()

int rte_devargs_add	(	enum rte_devtype	devtype,
		const char *	devargs_str
	)

Add a device to the user device list See rte_devargs_parse() for details.

Parameters

devtype	The type of the device.
devargs_str	The arguments as given by the user.

Returns

• 0 on success
• A negative value on error

rte_devargs_remove()

int rte_devargs_remove

(

struct rte_devargs *

devargs

)

Remove a device from the user device list. Its resources are freed. If the devargs cannot be found, nothing happens.

Parameters

devargs

The instance or a copy of devargs to remove.

Returns

0 on success. <0 on error. >0 if the devargs was not within the user device list.

rte_devargs_type_count()

unsigned int rte_devargs_type_count

(

enum rte_devtype

devtype

)

Count the number of user devices of a specified type

Parameters

devtype

The type of the devices to counted.

Returns

The number of devices.

rte_devargs_dump()

void rte_devargs_dump

(

FILE *

f

)

This function dumps the list of user device and their arguments.

Parameters

f	A pointer to a file for output

Examples:

examples/bond/main.c.

rte_devargs_next()

struct rte_devargs* rte_devargs_next	(	const char *	busname,
		const struct rte_devargs *	start
	)

Find next rte_devargs matching the provided bus name.

Parameters

busname	Limit the iteration to devargs related to buses matching this name. Will return any next rte_devargs if NULL.
start	Starting iteration point. The iteration will start at the first rte_devargs if NULL.

Returns

Next rte_devargs entry matching the requested bus, NULL if there is none.