libdrm: add prime fd->handle and handle->fd interfaces

These are just basic ioctl wrappers around the prime ioctls,
along with the capability reporting.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/include/drm/drm.h b/include/drm/drm.h
index 42133bc..a847689 100644 (file)
--- a/include/drm/drm.h
+++ b/include/drm/drm.h
@@ -685,6 +685,9 @@ struct drm_prime_handle {
 #define DRM_IOCTL_UNLOCK               DRM_IOW( 0x2b, struct drm_lock)
 #define DRM_IOCTL_FINISH               DRM_IOW( 0x2c, struct drm_lock)
 
+#define DRM_IOCTL_PRIME_HANDLE_TO_FD    DRM_IOWR(0x2d, struct drm_prime_handle)
+#define DRM_IOCTL_PRIME_FD_TO_HANDLE    DRM_IOWR(0x2e, struct drm_prime_handle)
+
 #define DRM_IOCTL_AGP_ACQUIRE          DRM_IO(  0x30)
 #define DRM_IOCTL_AGP_RELEASE          DRM_IO(  0x31)
 #define DRM_IOCTL_AGP_ENABLE           DRM_IOW( 0x32, struct drm_agp_mode)
@@ -697,9 +700,6 @@ struct drm_prime_handle {
 #define DRM_IOCTL_SG_ALLOC             DRM_IOWR(0x38, struct drm_scatter_gather)
 #define DRM_IOCTL_SG_FREE              DRM_IOW( 0x39, struct drm_scatter_gather)
 
-#define DRM_IOCTL_PRIME_HANDLE_TO_FD    DRM_IOWR(0x2d, struct drm_prime_handle)
-#define DRM_IOCTL_PRIME_FD_TO_HANDLE    DRM_IOWR(0x2e, struct drm_prime_handle)
-
 #define DRM_IOCTL_WAIT_VBLANK          DRM_IOWR(0x3a, union drm_wait_vblank)
 
 #define DRM_IOCTL_UPDATE_DRAW          DRM_IOW(0x3f, struct drm_update_draw)
@@ -778,6 +778,10 @@ struct drm_event_vblank {
 #define DRM_CAP_VBLANK_HIGH_CRTC   0x2
 #define DRM_CAP_DUMB_PREFERRED_DEPTH 0x3
 #define DRM_CAP_DUMB_PREFER_SHADOW 0x4
+#define DRM_CAP_PRIME 0x5
+
+#define DRM_PRIME_CAP_IMPORT 0x1
+#define DRM_PRIME_CAP_EXPORT 0x2
 
 /* typedef area */
 typedef struct drm_clip_rect drm_clip_rect_t;

diff --git a/xf86drm.c b/xf86drm.c
index 6ea068f..2a74c80 100644 (file)
--- a/xf86drm.c
+++ b/xf86drm.c
@@ -2542,3 +2542,34 @@ char *drmGetDeviceNameFromFd(int fd)
 
        return strdup(name);
 }
+
+int drmPrimeHandleToFD(int fd, uint32_t handle, uint32_t flags, int *prime_fd)
+{
+       struct drm_prime_handle args;
+       int ret;
+
+       args.handle = handle;
+       args.flags = flags;
+       ret = drmIoctl(fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &args);
+       if (ret)
+               return ret;
+
+       *prime_fd = args.fd;
+       return 0;
+}
+
+int drmPrimeFDToHandle(int fd, int prime_fd, uint32_t *handle)
+{
+       struct drm_prime_handle args;
+       int ret;
+
+       args.fd = prime_fd;
+       args.flags = 0;
+       ret = drmIoctl(fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &args);
+       if (ret)
+               return ret;
+
+       *handle = args.handle;
+       return 0;
+}
+

diff --git a/xf86drm.h b/xf86drm.h
index 76eb94e..5ecb284 100644 (file)
--- a/xf86drm.h
+++ b/xf86drm.h
@@ -727,6 +727,9 @@ extern int drmHandleEvent(int fd, drmEventContextPtr evctx);
 
 extern char *drmGetDeviceNameFromFd(int fd);
 
+extern int drmPrimeHandleToFD(int fd, uint32_t handle, uint32_t flags, int *prime_fd);
+extern int drmPrimeFDToHandle(int fd, int prime_fd, uint32_t *handle);
+
 #if defined(__cplusplus) || defined(c_plusplus)
 }
 #endif