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| author |   Madalin Bucur <madalin.bucur@nxp.com> | 2019-10-31 16:37:58 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-10-31 12:13:34 -0700 |
| commit | a2d00f3db73dc4f6f6afcc95c1db809ea9019306 (patch) | |
| tree | 2eae9cd0d87616c359dfcc149f41344fa1921d6e | |
| parent | dpaa_eth: extend delays in ndo_stop (diff) | |
| download | linux-dev-a2d00f3db73dc4f6f6afcc95c1db809ea9019306.tar.xz linux-dev-a2d00f3db73dc4f6f6afcc95c1db809ea9019306.zip | |
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: Madalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/soc/fsl/qbman/qman.c | 13 | ||||
| -rw-r--r-- | include/soc/fsl/qman.h | 18 |
2 files changed, 31 insertions, 0 deletions
diff --git a/drivers/soc/fsl/qbman/qman.c b/drivers/soc/fsl/qbman/qman.c index bf68d86d80ee..bc75a5882b9e 100644 --- a/drivers/soc/fsl/qbman/qman.c +++ b/drivers/soc/fsl/qbman/qman.c @@ -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); diff --git a/include/soc/fsl/qman.h b/include/soc/fsl/qman.h index aa31c05a103a..c499c5cfa7c9 100644 --- a/include/soc/fsl/qman.h +++ b/include/soc/fsl/qman.h @@ -32,6 +32,7 @@ #define __FSL_QMAN_H #include <linux/bitops.h> +#include <linux/device.h> /* Hardware constants */ #define QM_CHANNEL_SWPORTAL0 0 @@ -915,6 +916,23 @@ 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 * |