Commit a2d00f3d authored by Madalin Bucur's avatar Madalin Bucur Committed by David S. Miller
Browse files

soc: fsl: qbman: allow registering a device link for the portal user 



Introduce the API required to make sure that the devices that use
the QMan portal are unbound when the portal is unbound.

Signed-off-by: default avatarMadalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e414696d

drivers/soc/fsl/qbman/qman.c

+13 −0
Original line number Diff line number Diff line
@@ -1749,6 +1749,19 @@ struct qman_portal *qman_get_affine_portal(int cpu) 
}

EXPORT_SYMBOL(qman_get_affine_portal);



int qman_start_using_portal(struct qman_portal *p, struct device *dev)

{

	return (!device_link_add(dev, p->config->dev,

				 DL_FLAG_AUTOREMOVE_CONSUMER)) ? -EINVAL : 0;

}

EXPORT_SYMBOL(qman_start_using_portal);



void qman_stop_using_portal(struct qman_portal *p, struct device *dev)

{

	device_link_remove(dev, p->config->dev);

}

EXPORT_SYMBOL(qman_stop_using_portal);



int qman_p_poll_dqrr(struct qman_portal *p, unsigned int limit)

{

	return __poll_portal_fast(p, limit);

include/soc/fsl/qman.h

+18 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ 
#define __FSL_QMAN_H



#include <linux/bitops.h>

#include <linux/device.h>



/* Hardware constants */

#define QM_CHANNEL_SWPORTAL0 0
@@ -914,6 +915,23 @@ u16 qman_affine_channel(int cpu); 
 */

struct qman_portal *qman_get_affine_portal(int cpu);



/**

 * qman_start_using_portal - register a device link for the portal user

 * @p: the portal that will be in use

 * @dev: the device that will use the portal

 *

 * Makes sure that the devices that use the portal are unbound when the

 * portal is unbound

 */

int qman_start_using_portal(struct qman_portal *p, struct device *dev);



/**

 * qman_stop_using_portal - deregister a device link for the portal user

 * @p: the portal that will no longer be in use

 * @dev: the device that uses the portal

 */

void qman_stop_using_portal(struct qman_portal *p, struct device *dev);



/**

 * qman_p_poll_dqrr - process DQRR (fast-path) entries

 * @limit: the maximum number of DQRR entries to process