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 <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

7 files changed, 28 insertions, 12 deletions

diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c
index 7ae89b4a21d5..466afb2611c6 100644
--- a/drivers/misc/mei/amthif.c
+++ b/drivers/misc/mei/amthif.c
@@ -144,7 +144,7 @@ int mei_amthif_run_next_cmd(struct mei_device *dev)
         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;
 
diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c
index e9e6ea3ab73c..db60d57ebda9 100644
--- a/drivers/misc/mei/bus-fixup.c
+++ b/drivers/misc/mei/bus-fixup.c
@@ -162,7 +162,8 @@ static int mei_nfc_if_version(struct mei_cl *cl,
 
         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;
diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
index 8a1e813a548d..7c075e9b25e5 100644
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -36,12 +36,12 @@
  * @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;
@@ -80,9 +80,11 @@ ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
                 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);
@@ -188,7 +190,7 @@ ssize_t mei_cldev_send(struct mei_cl_device *cldev, u8 *buf, size_t length)
         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);
 
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 6fe02350578d..beb942e6c248 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -1598,18 +1598,17 @@ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
  *
  * @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;
@@ -1621,6 +1620,7 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
 
         buf = &cb->buf;
         size = buf->size;
+        blocking = cb->blocking;
 
         cl_dbg(dev, cl, "size=%d\n", size);
 
diff --git a/drivers/misc/mei/client.h b/drivers/misc/mei/client.h
index d2bfabecd882..f2545af9be7b 100644
--- a/drivers/misc/mei/client.h
+++ b/drivers/misc/mei/client.h
@@ -219,7 +219,7 @@ int mei_cl_irq_connect(struct mei_cl *cl, struct mei_cl_cb *cb,
 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);
 
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index a1484574cfa8..e1bf54481fd6 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -322,7 +322,7 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
                 goto out;
         }
 
-        rets = mei_cl_write(cl, cb, false);
+        rets = mei_cl_write(cl, cb);
 out:
         mutex_unlock(&dev->device_lock);
         return rets;
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 1169fd9e7d02..d50f70b4a05e 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -109,6 +109,17 @@ enum mei_cb_file_ops {
         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
  */
@@ -169,6 +180,7 @@ struct mei_cl;
  * @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 {
@@ -180,6 +192,7 @@ struct mei_cl_cb {
         const struct file *fp;
         int status;
         u32 internal:1;
+        u32 blocking:1;
         u32 completed:1;
 };
 
@@ -304,7 +317,7 @@ void mei_cl_bus_rescan(struct mei_device *bus);
 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);