/alps/bar_resolve

#define _BSD_SOURCE

#define _DEFAULT_SOURCE

#define _POSIX_C_SOURCE 199309L

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include <stdarg.h>

#include <time.h>

#include <sched.h>

#include <fcntl.h>

#include <errno.h>

#include <sys/types.h>

#include <sys/time.h>

#include <sys/stat.h>

#include <pcilib.h>

#include <pcilib/bar.h>

#include <pcilib/kmem.h>

#define DEVICE "/dev/fpga0"

#define BAR PCILIB_BAR0

#define WR(addr, value) { *(uint32_t*)(bar + addr) = value; }

#define RD(addr, value) { value = *(uint32_t*)(bar + addr); }

void request(void* volatile ua) {

    int fd = open("/sys/class/test/test0/test_request",  O_RDWR);

    if (fd >= 0) {

	size_t bytes;

	char res[64];

	sprintf(res, "%p", ua);

	write(fd, res, strlen(res));

	lseek(fd, SEEK_SET, 0);

	bytes = read(fd, res, sizeof(res) - 1); 

	printf("Res : ");

	if (bytes < 0) {

	    puts("Error");

	} else {

	    res[bytes] = 0;

	    puts(res);

	}

	close(fd);

    } else {

        printf("Error openning /sys/class/test/test0/test_request, errno %i\n", errno);

    }

}

int main(int argc, char *argv[]) {

    uint32_t i, j;

    pcilib_t *pci;

    pcilib_kmem_handle_t *kbuf;

    void* volatile bar;

    const pcilib_bar_info_t *bar_info;

    pci = pcilib_open(DEVICE, PCILIB_MODEL_DETECT);

    if (!pci) {

	printf("pcilib_open\n");

	exit(1);

    }

    kbuf = pcilib_alloc_kernel_memory(pci, PCILIB_KMEM_TYPE_PAGE, 1, 4096, 4096, 0, 0);

    void* volatile ua = pcilib_kmem_get_ua(pci, kbuf);

    uintptr_t pa = pcilib_kmem_get_pa(pci, kbuf);

    printf("Kmem\n-----\n");

    printf("User: %p\n", ua);

    printf("HW  : 0x%lx\n", pa);

    request(ua);

    printf("\n");

    bar = pcilib_resolve_bar_address(pci, BAR, 0);

    if (!bar) {

        pcilib_close(pci);

        printf("map bar\n");

        exit(1);

    }

    bar_info = pcilib_get_bar_info(pci, BAR);

    printf("Bar\n-----\n");

    printf("User: %p\n", bar_info[BAR].virt_addr);

    printf("HW  : %p\n", bar_info[BAR].phys_addr);

    request(bar_info[BAR].virt_addr);

    printf("\n");

    pcilib_free_kernel_memory(pci, kbuf, 0);

    pcilib_close(pci);

}