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/drivers/gpu/ion/ion_priv.h b/drivers/gpu/ion/ion_priv.h
index 1d40aef..36758fa 100644
--- a/drivers/gpu/ion/ion_priv.h
+++ b/drivers/gpu/ion/ion_priv.h
@@ -271,4 +271,23 @@
void *ion_map_fmem_buffer(struct ion_buffer *buffer, unsigned long phys_base,
void *virt_base, unsigned long flags);
+/**
+ * ion_do_cache_op - do cache operations.
+ *
+ * @client - pointer to ION client.
+ * @handle - pointer to buffer handle.
+ * @uaddr - virtual address to operate on.
+ * @offset - offset from physical address.
+ * @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 ion_do_cache_op(struct ion_client *client, struct ion_handle *handle,
+ void *uaddr, unsigned long offset, unsigned long len,
+ unsigned int cmd);
+
#endif /* _ION_PRIV_H */