pciinfo

C library to extract the Linux system filehandle paths of PCI device BARs based on vendor and device id.

How-to

Clone

git clone https://github.com/andkae/pciinfo.git

Build

The Makefile builds the repository:

$ make
gcc -c -O -Wall -Wextra -Wimplicit -Wconversion -I . ./pciinfo_main.c -o ./bin/pciinfo_main.o
gcc -c -O -Wall -Wextra -Wimplicit -Wconversion -I . ./pciinfo.c -o ./bin/pciinfo.o
gcc ./bin/pciinfo_main.o ./bin/pciinfo.o -Wall -Wextra -I. -lm -o ./bin/pciinfo_main

The library part itself can be built with:

gcc -c -O -Wall -Wextra -Wimplicit -Wconversion -I . ./pciinfo.c -o ./bin/pciinfo.o

Enable Debug Output

To enable the debug printf add the compile switch -DPCIINFO_PRINTF_EN to the gcc call.

API

pciinfoFind

Finds the PCI device memory mapped file paths based on a given vendor and device id.

int pciinfoFind(const char vendorID[], const char deviceID[], char devicePath[], uint32_t devicePathMax)

pciinfoBarSize

Acquires bar sizes from os.

int pciinfoBarSize(const char sysPathPciDev[], uint32_t byteSize[]);

pciinfoBarPath

Extracts from Linux path to memory mapped file of PCI bar.

int pciinfoBarPath(const char vendorID[], const char deviceID[], uint8_t bar, char devicePath[], uint32_t devicePathMax);

pciinfoBarPhyAddr

Gets the PCI bar assigned physical addresses.

int pciinfoBarPhyAddr(const char sysPathPciDev[], uint8_t barNo, uint32_t *barPhyAddr);