gpu: ion: Add API to do cache operations
Clients need to be able to do cache operations
on ION buffers in the kernel. Add API to
flush, invalidate, or invalidate and flush the
cache of an ION buffer.
Change-Id: I2b676dbe32372b3c17e4aaf39f51878b105a699c
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
diff --git a/include/linux/ion.h b/include/linux/ion.h
index caed2a2..ca1f198 100644
--- a/include/linux/ion.h
+++ b/include/linux/ion.h
@@ -493,6 +493,23 @@
*/
int msm_ion_unsecure_heap(int heap_id);
+/**
+ * msm_ion_do_cache_op - do cache operations.
+ *
+ * @client - pointer to ION client.
+ * @handle - pointer to buffer handle.
+ * @vaddr - virtual address to operate on.
+ * @len - Length of data to do cache operation on.
+ * @cmd - Cache operation to perform:
+ * ION_IOC_CLEAN_CACHES
+ * ION_IOC_INV_CACHES
+ * ION_IOC_CLEAN_INV_CACHES
+ *
+ * Returns 0 on success
+ */
+int msm_ion_do_cache_op(struct ion_client *client, struct ion_handle *handle,
+ void *vaddr, unsigned long len, unsigned int cmd);
+
#else
static inline struct ion_client *ion_client_create(struct ion_device *dev,
unsigned int heap_mask, const char *name)
@@ -604,6 +621,14 @@
{
return -ENODEV;
}
+
+static inline int msm_ion_do_cache_op(struct ion_client *client,
+ struct ion_handle *handle, void *vaddr,
+ unsigned long len, unsigned int cmd)
+{
+ return -ENODEV;
+}
+
#endif /* CONFIG_ION */
#endif /* __KERNEL__ */