gallium/radeon: Implement hooks for DRI Image 7 (v2)

v2: Fix transliteration of lseek arguments
    Ignore busy return from RADEON_GEM_BUSY ioctl; we're only after the domain

Signed-off-by: Christopher James Halse Rogers <christopher.halse.rogers@canonical.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/gallium/targets/radeonsi/common/drm_target.c b/src/gallium/targets/radeonsi/common/drm_target.c
index 9eef368..08ff47d 100644
--- a/src/gallium/targets/radeonsi/common/drm_target.c
+++ b/src/gallium/targets/radeonsi/common/drm_target.c
@@ -55,11 +55,27 @@ static const struct drm_conf_ret throttle_ret = {
    .val.val_int = 2,
 };
 
+/* Technically this is only true for kernels >= 3.12, which
+ * support lseek on dma-buf fds.
+ *
+ * We could check for this in create_screen and return the correct
+ * value, but for now just return true in all cases.
+ * 
+ * createImageFromFds fails gracefully on kernel < 3.12, so this
+ * shouldn't be a huge problem.
+ */
+static const struct drm_conf_ret share_fd_ret = {
+   .type = DRM_CONF_BOOL,
+   .val.val_int = true,
+};
+
 static const struct drm_conf_ret *drm_configuration(enum drm_conf conf)
 {
    switch (conf) {
    case DRM_CONF_THROTTLE:
       return &throttle_ret;
+   case DRM_CONF_SHARE_FD:
+      return &share_fd_ret;
    default:
       break;
    }