mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-01 14:44:12 +00:00
Code Issues Releases Wiki Activity

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

Browse source 
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: Madalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Madalin Bucur 2019-10-31 16:37:58 +02:00 committed by David S. Miller
parent e414696d49
commit a2d00f3db7
2 changed files with 31 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
drivers/soc/fsl/qbman/qman.c
View file

@ -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);

18
include/soc/fsl/qman.h
View file

@ -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