gpu: ion: Add explicit sync ioctl
This is deprecated in favor of using the dma_buf api which will
automatically sync a buffer to memory when it is mapped to a device.
However, that functionality is not ready, so this patch adds the
ability to sync a buffer explicitly.
Change-Id: Ia15810a13cd5c4b939f4afa5c8e721c89fac76d4
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
Git-commit: a73e94ce46cfc32b6deeb1589142e3c53fee09ab
Git-repo: https://android.googlesource.com/kernel/common
[mitchelh@codeaurora.org: minor merge conflicts]
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
diff --git a/include/linux/ion.h b/include/linux/ion.h
index fb1c5f6..2941d7a 100644
--- a/include/linux/ion.h
+++ b/include/linux/ion.h
@@ -606,6 +606,16 @@
#define ION_IOC_IMPORT _IOWR(ION_IOC_MAGIC, 5, struct ion_fd_data)
/**
+ * DOC: ION_IOC_SYNC - syncs a shared file descriptors to memory
+ *
+ * Deprecated in favor of using the dma_buf api's correctly (syncing
+ * will happend automatically when the buffer is mapped to a device).
+ * If necessary should be used after touching a cached buffer from the cpu,
+ * this will make the buffer in memory coherent.
+ */
+#define ION_IOC_SYNC _IOWR(ION_IOC_MAGIC, 7, struct ion_fd_data)
+
+/**
* DOC: ION_IOC_CUSTOM - call architecture specific ion ioctl
*
* Takes the argument of the architecture specific ioctl to call and