mei: bus: Initial implementation for I/O routines

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 7abb705ddf3f..cde5687039f3 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -268,6 +268,25 @@ struct mei_cl_device *mei_cl_add_device(struct mei_device *dev,
                                   uuid_le uuid, char *name);
 void mei_cl_remove_device(struct mei_cl_device *device);
 
+int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length);
+int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length);
+
+/**
+ * struct mei_cl_transport_ops - MEI CL device transport ops
+ * This structure allows ME host clients to implement technology
+ * specific transport layers.
+ *
+ * @send: Tx hook for the device. This allows ME host clients to trap
+ *      the device driver buffers before actually physically
+ *      pushing it to the ME.
+ * @recv: Rx hook for the device. This allows ME host clients to trap the
+ *      ME buffers before forwarding them to the device driver.
+ */
+struct mei_cl_transport_ops {
+        int (*send)(struct mei_cl_device *device, u8 *buf, size_t length);
+        int (*recv)(struct mei_cl_device *device, u8 *buf, size_t length);
+};
+
 /**
  * struct mei_cl_device - MEI device handle
  * An mei_cl_device pointer is returned from mei_add_device()
@@ -278,6 +297,10 @@ void mei_cl_remove_device(struct mei_cl_device *device);
  * @dev: linux driver model device pointer
  * @uuid: me client uuid
  * @cl: mei client
+ * @ops: ME transport ops
+ * @event_cb: Drivers register this callback to get asynchronous ME
+ *      events (e.g. Rx buffer pending) notifications.
+ * @events: Events bitmask sent to the driver.
  * @priv_data: client private data
  */
 struct mei_cl_device {
@@ -285,6 +308,13 @@ struct mei_cl_device {
 
         struct mei_cl *cl;
 
+        const struct mei_cl_transport_ops *ops;
+
+        struct work_struct event_work;
+        mei_cl_event_cb_t event_cb;
+        void *event_context;
+        unsigned long events;
+
         void *priv_data;
 };