/barmap

Kernel module to map PCIe BAR into userspace

Primary LanguageC

Usage

make

sudo insmod barmap.ko

sudo mount -t debugfs nodev /sys/kernel/debug/

To map BAR into userspace, refer to the following example:

int configfd;
configfd = open("/sys/kernel/debug/barmap", O_RDWR);
if(configfd < 0) {
    perror("open");
return -1;
}

char * address = NULL;
address = mmap(NULL, 16*1024*1024, PROT_READ|PROT_WRITE, MAP_SHARED, configfd, 0);
if (address == MAP_FAILED) {
    perror("mmap");
return -1;
}