drm/radeon: Add RADEON_INFO_VA_UNMAP_WORKING query

This tells userspace that it's safe to use the RADEON_VA_UNMAP operation
of the DRM_RADEON_GEM_VA ioctl.

Cc: stable@vger.kernel.org
(NOTE: Backporting this commit requires at least backports of commits
26d4d129b6042197b4cbc8341c0618f99231af2f,
48afbd70ac7b6aa62e8d452091023941d8085f8a and
c29c0876ec05d51a93508a39b90b92c29ba6423d as well, otherwise using
RADEON_VA_UNMAP runs into trouble)

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>

diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 7b2a7335cc5d557eafa6864d50cb6ebc9cdfb5ff..b0acf50d95581d9970cef89690be25b32324c7b3 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -576,6 +576,9 @@ static int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file
                if (radeon_get_allowed_info_register(rdev, *value, value))
                        return -EINVAL;
                break;
+       case RADEON_INFO_VA_UNMAP_WORKING:
+               *value = true;
+               break;
        default:
                DRM_DEBUG_KMS("Invalid request %d\n", info->request);
                return -EINVAL;

diff --git a/include/uapi/drm/radeon_drm.h b/include/uapi/drm/radeon_drm.h
index 871e73f99a4d7aa13b4cd6f5bc8969421c2a9301..94d44ab2fda1821bcda7e1b541bcfeffb556e7c5 100644 (file)
--- a/include/uapi/drm/radeon_drm.h
+++ b/include/uapi/drm/radeon_drm.h
@@ -1038,6 +1038,7 @@ struct drm_radeon_cs {
 #define RADEON_INFO_CURRENT_GPU_SCLK   0x22
 #define RADEON_INFO_CURRENT_GPU_MCLK   0x23
 #define RADEON_INFO_READ_REG           0x24
+#define RADEON_INFO_VA_UNMAP_WORKING   0x25
 
 struct drm_radeon_info {
        uint32_t                request;