drm/amd/amdgpu: export vbios information (v2)
Allows userspace components to fetch information
from the vbios image.
v2: agd: fix warning
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian Koenig <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index d1cf9ac..9af87ea 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -544,6 +544,32 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
return copy_to_user(out, &vce_clk_table,
min((size_t)size, sizeof(vce_clk_table))) ? -EFAULT : 0;
}
+ case AMDGPU_INFO_VBIOS: {
+ uint32_t bios_size = adev->bios_size;
+
+ switch (info->vbios_info.type) {
+ case AMDGPU_INFO_VBIOS_SIZE:
+ return copy_to_user(out, &bios_size,
+ min((size_t)size, sizeof(bios_size)))
+ ? -EFAULT : 0;
+ case AMDGPU_INFO_VBIOS_IMAGE: {
+ uint8_t *bios;
+ uint32_t bios_offset = info->vbios_info.offset;
+
+ if (bios_offset >= bios_size)
+ return -EINVAL;
+
+ bios = adev->bios + bios_offset;
+ return copy_to_user(out, bios,
+ min((size_t)size, (size_t)(bios_size - bios_offset)))
+ ? -EFAULT : 0;
+ }
+ default:
+ DRM_DEBUG_KMS("Invalid request %d\n",
+ info->vbios_info.type);
+ return -EINVAL;
+ }
+ }
default:
DRM_DEBUG_KMS("Invalid request %d\n", info->query);
return -EINVAL;