drm: Add 32-bit compatibility for DRM_IOCTL_UPDATE_DRAW.
This fixes vblank support for a 32-bit X Server on a 64-bit kernel.
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_ioc32.c b/drivers/gpu/drm/drm_ioc32.c
index 90f5a8d..920b72f 100644
--- a/drivers/gpu/drm/drm_ioc32.c
+++ b/drivers/gpu/drm/drm_ioc32.c
@@ -64,6 +64,8 @@
#define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t)
#define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t)
+#define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t)
+
#define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t)
typedef struct drm_version_32 {
@@ -952,6 +954,37 @@
DRM_IOCTL_SG_FREE, (unsigned long)request);
}
+typedef struct drm_update_draw32 {
+ drm_drawable_t handle;
+ unsigned int type;
+ unsigned int num;
+ /* 64-bit version has a 32-bit pad here */
+ u64 data; /**< Pointer */
+} __attribute__((packed)) drm_update_draw32_t;
+
+static int compat_drm_update_draw(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ drm_update_draw32_t update32;
+ struct drm_update_draw __user *request;
+ int err;
+
+ if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
+ return -EFAULT;
+
+ request = compat_alloc_user_space(sizeof(*request));
+ if (!access_ok(VERIFY_WRITE, request, sizeof(*request)) ||
+ __put_user(update32.handle, &request->handle) ||
+ __put_user(update32.type, &request->type) ||
+ __put_user(update32.num, &request->num) ||
+ __put_user(update32.data, &request->data))
+ return -EFAULT;
+
+ err = drm_ioctl(file->f_path.dentry->d_inode, file,
+ DRM_IOCTL_UPDATE_DRAW, (unsigned long)request);
+ return err;
+}
+
struct drm_wait_vblank_request32 {
enum drm_vblank_seq_type type;
unsigned int sequence;
@@ -1033,6 +1066,7 @@
#endif
[DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)] = compat_drm_sg_alloc,
[DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)] = compat_drm_sg_free,
+ [DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw,
[DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank,
};