mei: enable to set the internal flag for client write

Prepare the client write functions to set the internal flag in message
header. Carry both blocking and internal modes inside the transmit cb,
and call internal bus function __mei_cl_send() with send mode bit mask.
The Internal flag should be added only on messages generated by the
driver.

Signed-off-by: Alexander Usyskin <[e-mail]>
Signed-off-by: Tomas Winkler <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/misc/mei/amthif.c

···
 	dev->iamthif_state = MEI_IAMTHIF_WRITING;
 	cl->fp = cb->fp;
 
-	ret = mei_cl_write(cl, cb, false);
+	ret = mei_cl_write(cl, cb);
 	if (ret < 0)
 		return ret;
 

drivers/misc/mei/bus-fixup.c

···
 
 	WARN_ON(mutex_is_locked(&bus->device_lock));
 
-	ret = __mei_cl_send(cl, (u8 *)&cmd, sizeof(struct mei_nfc_cmd), 1);
+	ret = __mei_cl_send(cl, (u8 *)&cmd, sizeof(struct mei_nfc_cmd),
+			    MEI_CL_IO_TX_BLOCKING);
 	if (ret < 0) {
 		dev_err(bus->dev, "Could not send IF version cmd\n");
 		return ret;

drivers/misc/mei/bus.c

···
  * @cl: host client
  * @buf: buffer to send
  * @length: buffer length
- * @blocking: wait for write completion
+ * @mode: sending mode
  *
  * Return: written size bytes or < 0 on error
  */
 ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
-			bool blocking)
+		      unsigned int mode)
 {
 	struct mei_device *bus;
 	struct mei_cl_cb *cb;
···
 		goto out;
 	}
 
+	cb->internal = !!(mode & MEI_CL_IO_TX_INTERNAL);
+	cb->blocking = !!(mode & MEI_CL_IO_TX_BLOCKING);
 	memcpy(cb->buf.data, buf, length);
 
-	rets = mei_cl_write(cl, cb, blocking);
+	rets = mei_cl_write(cl, cb);
 
 out:
 	mutex_unlock(&bus->device_lock);
···
 	if (cl == NULL)
 		return -ENODEV;
 
-	return __mei_cl_send(cl, buf, length, 1);
+	return __mei_cl_send(cl, buf, length, MEI_CL_IO_TX_BLOCKING);
 }
 EXPORT_SYMBOL_GPL(mei_cldev_send);
 

drivers/misc/mei/client.c

···
  *
  * @cl: host client
  * @cb: write callback with filled data
- * @blocking: block until completed
  *
  * Return: number of bytes sent on success, <0 on failure.
  */
-int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
+int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb)
 {
 	struct mei_device *dev;
 	struct mei_msg_data *buf;
 	struct mei_msg_hdr mei_hdr;
 	int size;
 	int rets;
-
+	bool blocking;
 
 	if (WARN_ON(!cl || !cl->dev))
 		return -ENODEV;
···
 
 	buf = &cb->buf;
 	size = buf->size;
+	blocking = cb->blocking;
 
 	cl_dbg(dev, cl, "size=%d\n", size);
 

drivers/misc/mei/client.h

···
 int mei_cl_read_start(struct mei_cl *cl, size_t length, const struct file *fp);
 int mei_cl_irq_read_msg(struct mei_cl *cl, struct mei_msg_hdr *hdr,
 			struct mei_cl_cb *cmpl_list);
-int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking);
+int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb);
 int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
 		     struct mei_cl_cb *cmpl_list);
 

drivers/misc/mei/main.c

···
 		goto out;
 	}
 
-	rets = mei_cl_write(cl, cb, false);
+	rets = mei_cl_write(cl, cb);
 out:
 	mutex_unlock(&dev->device_lock);
 	return rets;

drivers/misc/mei/mei_dev.h

···
 	MEI_FOP_NOTIFY_STOP,
 };
 
+/**
+ * enum mei_cl_io_mode - io mode between driver and fw
+ *
+ * @MEI_CL_IO_TX_BLOCKING: send is blocking
+ * @MEI_CL_IO_TX_INTERNAL: internal communication between driver and FW
+ */
+enum mei_cl_io_mode {
+	MEI_CL_IO_TX_BLOCKING = BIT(0),
+	MEI_CL_IO_TX_INTERNAL = BIT(1),
+};
+
 /*
  * Intel MEI message data struct
  */
···
  * @fp: pointer to file structure
  * @status: io status of the cb
  * @internal: communication between driver and FW flag
+ * @blocking: transmission blocking mode
  * @completed: the transfer or reception has completed
  */
 struct mei_cl_cb {
···
 	const struct file *fp;
 	int status;
 	u32 internal:1;
+	u32 blocking:1;
 	u32 completed:1;
 };
 
···
 void mei_cl_bus_rescan_work(struct work_struct *work);
 void mei_cl_bus_dev_fixup(struct mei_cl_device *dev);
 ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
-			bool blocking);
+		      unsigned int mode);
 ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length);
 bool mei_cl_bus_rx_event(struct mei_cl *cl);
 bool mei_cl_bus_notify_event(struct mei_cl *cl);