gallium: support for native fence fd's

This enables gallium support for EGL_ANDROID_native_fence_sync, for
drivers which support PIPE_CAP_NATIVE_FENCE_FD.

Signed-off-by: Rob Clark <[email protected]>

3 files changed, 25 insertions, 0 deletions

diff --git a/src/gallium/include/pipe/p_context.h b/src/gallium/include/pipe/p_context.h
index ee8a5113caa..171dc570ba0 100644
--- a/src/gallium/include/pipe/p_context.h
+++ b/src/gallium/include/pipe/p_context.h
@@ -475,6 +475,19 @@ struct pipe_context {
                  unsigned flags);
 
    /**
+    * Create a fence from a native sync fd.
+    *
+    * This is used for importing a foreign/external fence fd.
+    *
+    * \param fence  if not NULL, an old fence to unref and transfer a
+    *    new fence reference to
+    * \param fd     native fence fd
+    */
+   void (*create_fence_fd)(struct pipe_context *pipe,
+                           struct pipe_fence_handle **fence,
+                           int fd);
+
+   /**
     * Insert commands to have GPU wait for fence to be signaled.
     */
    void (*fence_server_sync)(struct pipe_context *pipe,
diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 46e9039a9ec..f1dd7935a78 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -350,6 +350,7 @@ enum pipe_flush_flags
 {
    PIPE_FLUSH_END_OF_FRAME = (1 << 0),
    PIPE_FLUSH_DEFERRED = (1 << 1),
+   PIPE_FLUSH_FENCE_FD = (1 << 2),
 };
 
 /**
@@ -741,6 +742,7 @@ enum pipe_cap
    PIPE_CAP_TGSI_ARRAY_COMPONENTS,
    PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS,
    PIPE_CAP_TGSI_CAN_READ_OUTPUTS,
+   PIPE_CAP_NATIVE_FENCE_FD,
 };
 
 #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 (1 << 0)
diff --git a/src/gallium/include/pipe/p_screen.h b/src/gallium/include/pipe/p_screen.h
index 255647ed273..f04c2ed83ab 100644
--- a/src/gallium/include/pipe/p_screen.h
+++ b/src/gallium/include/pipe/p_screen.h
@@ -265,6 +265,16 @@ struct pipe_screen {
                            uint64_t timeout);
 
    /**
+    * For fences created with PIPE_FLUSH_FENCE_FD (exported fd) or
+    * by create_fence_fd() (imported fd), return the native fence fd
+    * associated with the fence.  This may return -1 for fences
+    * created with PIPE_FLUSH_DEFERRED if the fence command has not
+    * been flushed yet.
+    */
+   int (*fence_get_fd)(struct pipe_screen *screen,
+                       struct pipe_fence_handle *fence);
+
+   /**
     * Returns a driver-specific query.
     *
     * If \p info is NULL, the number of available queries is returned.