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Commit a532bbed authored by Tomas Winkler's avatar Tomas Winkler Committed by Greg Kroah-Hartman
Browse files

mei: add function to check write queues 



The driver needs to check whether the write
queue idle before entering power gating

Signed-off-by: default avatarTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: default avatarAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ba9cdd0e

drivers/misc/mei/init.c

+21 −0
Original line number Original line Diff line number Diff line
@@ -303,7 +303,28 @@ void mei_stop(struct mei_device *dev) 
}

}

EXPORT_SYMBOL_GPL(mei_stop);

EXPORT_SYMBOL_GPL(mei_stop);





/**

 * mei_write_is_idle - check if the write queues are idle

 *

 * @dev: the device structure

 *

 * returns true of there is no pending write

 */

bool mei_write_is_idle(struct mei_device *dev)

{

	bool idle = (dev->dev_state == MEI_DEV_ENABLED &&

		list_empty(&dev->ctrl_wr_list.list) &&

		list_empty(&dev->write_list.list));





	dev_dbg(&dev->pdev->dev, "write pg: is idle[%d] state=%s ctrl=%d write=%d\n",

		idle,

		mei_dev_state_str(dev->dev_state),

		list_empty(&dev->ctrl_wr_list.list),

		list_empty(&dev->write_list.list));



	return idle;

}

EXPORT_SYMBOL_GPL(mei_write_is_idle);





void mei_device_init(struct mei_device *dev)

void mei_device_init(struct mei_device *dev)

{

{

drivers/misc/mei/mei_dev.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -680,6 +680,8 @@ static inline int mei_count_full_read_slots(struct mei_device *dev) 




bool mei_hbuf_acquire(struct mei_device *dev);

bool mei_hbuf_acquire(struct mei_device *dev);





bool mei_write_is_idle(struct mei_device *dev);



#if IS_ENABLED(CONFIG_DEBUG_FS)

#if IS_ENABLED(CONFIG_DEBUG_FS)

int mei_dbgfs_register(struct mei_device *dev, const char *name);

int mei_dbgfs_register(struct mei_device *dev, const char *name);

void mei_dbgfs_deregister(struct mei_device *dev);

void mei_dbgfs_deregister(struct mei_device *dev);