rte_pci.h File Reference

#include <stdio.h>
#include <limits.h>
#include <sys/queue.h>
#include <inttypes.h>

Go to the source code of this file.

Data Structures
struct	rte_pci_id
struct	rte_pci_addr
struct	pci_map
struct	mapped_pci_resource

Macros
#define	PCI_PRI_FMT   "%.4" PRIx32 ":%.2" PRIx8 ":%.2" PRIx8 ".%" PRIx8
#define	PCI_SHORT_PRI_FMT   "%.2" PRIx8 ":%.2" PRIx8 ".%" PRIx8
#define	PCI_FMT_NVAL   4
#define	PCI_RESOURCE_FMT_NVAL   3
#define	PCI_MAX_RESOURCE   6
#define	PCI_ANY_ID   (0xffff)

Functions
	TAILQ_HEAD (mapped_pci_res_list, mapped_pci_resource)
void	rte_pci_device_name (const struct rte_pci_addr *addr, char *output, size_t size)
int	rte_pci_addr_cmp (const struct rte_pci_addr *addr, const struct rte_pci_addr *addr2)
int	rte_pci_addr_parse (const char *str, struct rte_pci_addr *addr)
void *	pci_map_resource (void *requested_addr, int fd, off_t offset, size_t size, int additional_flags)
void	pci_unmap_resource (void *requested_addr, size_t size)

Detailed Description

RTE PCI Library

Definition in file rte_pci.h.

Macro Definition Documentation

PCI_PRI_FMT

#define PCI_PRI_FMT   "%.4" PRIx32 ":%.2" PRIx8 ":%.2" PRIx8 ".%" PRIx8

Formatting string for PCI device identifier: Ex: 0000:00:01.0

Examples:

examples/vdpa/main.c.

Definition at line 25 of file rte_pci.h.

PCI_SHORT_PRI_FMT

#define PCI_SHORT_PRI_FMT   "%.2" PRIx8 ":%.2" PRIx8 ".%" PRIx8

Short formatting string, without domain, for PCI device: Ex: 00:01.0

Definition at line 29 of file rte_pci.h.

PCI_FMT_NVAL

#define PCI_FMT_NVAL   4

Nb. of values in PCI device identifier format string.

Definition at line 32 of file rte_pci.h.

PCI_RESOURCE_FMT_NVAL

#define PCI_RESOURCE_FMT_NVAL   3

Nb. of values in PCI resource format.

Definition at line 35 of file rte_pci.h.

PCI_MAX_RESOURCE

#define PCI_MAX_RESOURCE   6

Maximum number of PCI resources.

Definition at line 38 of file rte_pci.h.

PCI_ANY_ID

#define PCI_ANY_ID   (0xffff)

Any PCI device identifier (vendor, device, ...)

Definition at line 63 of file rte_pci.h.

Function Documentation

TAILQ_HEAD()

TAILQ_HEAD	(	mapped_pci_res_list	,
		mapped_pci_resource
	)

mapped pci device list

rte_pci_device_name()

void rte_pci_device_name	(	const struct rte_pci_addr *	addr,
		char *	output,
		size_t	size
	)

Utility function to write a pci device name, this device name can later be used to retrieve the corresponding rte_pci_addr using eal_parse_pci_* BDF helpers.

Parameters

addr	The PCI Bus-Device-Function address
output	The output buffer string
size	The output buffer size

rte_pci_addr_cmp()

int rte_pci_addr_cmp	(	const struct rte_pci_addr *	addr,
		const struct rte_pci_addr *	addr2
	)

Utility function to compare two PCI device addresses.

Parameters

addr	The PCI Bus-Device-Function address to compare
addr2	The PCI Bus-Device-Function address to compare

Returns

0 on equal PCI address. Positive on addr is greater than addr2. Negative on addr is less than addr2, or error.

rte_pci_addr_parse()

int rte_pci_addr_parse	(	const char *	str,
		struct rte_pci_addr *	addr
	)

Utility function to parse a string into a PCI location.

Parameters

str	The string to parse
addr	The reference to the structure where the location is stored.

Returns

0 on success <0 otherwise

Examples:

examples/vdpa/main.c.

pci_map_resource()

void* pci_map_resource	(	void *	requested_addr,
		int	fd,
		off_t	offset,
		size_t	size,
		int	additional_flags
	)

Map a particular resource from a file.

Parameters

requested_addr	The starting address for the new mapping range.
fd	The file descriptor.
offset	The offset for the mapping range.
size	The size for the mapping range.
additional_flags	The additional flags for the mapping range.

Returns

• On success, the function returns a pointer to the mapped area.
• On error, the value MAP_FAILED is returned.

pci_unmap_resource()

void pci_unmap_resource	(	void *	requested_addr,
		size_t	size
	)

Unmap a particular resource.

Parameters

requested_addr	The address for the unmapping range.
size	The size for the unmapping range.