diff mbox series

[net-next,12/13] soc: fsl: qbman: allow registering a device link for the portal user

Message ID 1572521819-10458-13-git-send-email-madalin.bucur@nxp.com
State Changes Requested
Headers show
Series DPAA Ethernet changes | expand

Commit Message

Madalin Bucur Oct. 31, 2019, 11:36 a.m. UTC 
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>
---
 drivers/soc/fsl/qbman/qman.c | 13 +++++++++++++
 include/soc/fsl/qman.h       | 18 ++++++++++++++++++
 2 files changed, 31 insertions(+)
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Patch

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
  *