LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/bios/image.c

   1/*
   2 * Copyright 2014 Red Hat Inc.
   3 *
   4 * Permission is hereby granted, free of charge, to any person obtaining a
   5 * copy of this software and associated documentation files (the "Software"),
   6 * to deal in the Software without restriction, including without limitation
   7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 * and/or sell copies of the Software, and to permit persons to whom the
   9 * Software is furnished to do so, subject to the following conditions:
  10 *
  11 * The above copyright notice and this permission notice shall be included in
  12 * all copies or substantial portions of the Software.
  13 *
  14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20 * OTHER DEALINGS IN THE SOFTWARE.
  21 *
  22 * Authors: Ben Skeggs <bskeggs@redhat.com>
  23 */
  24#include <subdev/bios.h>
  25#include <subdev/bios/image.h>
  26#include <subdev/bios/pcir.h>
  27#include <subdev/bios/npde.h>
  28
  29static bool
  30nvbios_imagen(struct nvkm_bios *bios, struct nvbios_image *image)
  31{
  32        struct nvkm_subdev *subdev = &bios->subdev;
  33        struct nvbios_pcirT pcir;
  34        struct nvbios_npdeT npde;
  35        u8  ver;
  36        u16 hdr;
  37        u32 data;
  38
  39        switch ((data = nvbios_rd16(bios, image->base + 0x00))) {
  40        case 0xaa55:
  41        case 0xbb77:
  42        case 0x4e56: /* NV */
  43                break;
  44        default:
  45                nvkm_debug(subdev, "%08x: ROM signature (%04x) unknown\n",
  46                           image->base, data);
  47                return false;
  48        }
  49
  50        if (!(data = nvbios_pcirTp(bios, image->base, &ver, &hdr, &pcir)))
  51                return false;
  52        image->size = pcir.image_size;
  53        image->type = pcir.image_type;
  54        image->last = pcir.last;
  55
  56        if (image->type != 0x70) {
  57                if (!(data = nvbios_npdeTp(bios, image->base, &npde)))
  58                        return true;
  59                image->size = npde.image_size;
  60                image->last = npde.last;
  61        } else {
  62                image->last = true;
  63        }
  64
  65        return true;
  66}
  67
  68bool
  69nvbios_image(struct nvkm_bios *bios, int idx, struct nvbios_image *image)
  70{
  71        u32 imaged_addr = bios->imaged_addr;
  72        memset(image, 0x00, sizeof(*image));
  73        bios->imaged_addr = 0;
  74        do {
  75                image->base += image->size;
  76                if (image->last || !nvbios_imagen(bios, image)) {
  77                        bios->imaged_addr = imaged_addr;
  78                        return false;
  79                }
  80        } while(idx--);
  81        bios->imaged_addr = imaged_addr;
  82        return true;
  83}
  84