util/inteltool/gfx.c

   1 /* inteltool - dump all registers on an Intel CPU + chipset based system */
   2 /* SPDX-License-Identifier: GPL-2.0-only */
   3
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <inttypes.h>
   7 #include "inteltool.h"
   8
   9 #define MMIO_SIZE 0x100000
  10
  11 int print_gfx(struct pci_dev *gfx)
  12 {
  13         uint64_t mmio_phys;
  14         uint8_t *mmio;
  15         uint32_t i;
  16         if (!gfx) {
  17                 printf ("No IGD found\n");
  18                 return 0;
  19         }
  20         printf("\n============= IGD ==============\n\n");
  21         mmio_phys = gfx->base_addr[0] & ~0x7ULL;
  22         printf("IGD MMIO = 0x%08llx (MEM)\n\n", (unsigned long long)mmio_phys);
  23         mmio = map_physical(mmio_phys, MMIO_SIZE);
  24         if (mmio == NULL) {
  25                 perror("Error mapping MMIO");
  26                 exit(1);
  27         }
  28         for (i = 0; i < MMIO_SIZE; i += 4) {
  29                 if (read32(mmio + i))
  30                         printf("0x%06x: 0x%08x\n", i, read32(mmio + i));
  31         }
  32         unmap_physical((void *)mmio, MMIO_SIZE);
  33         return 0;
  34
  35 }