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Subject[PATCH v2 04/12] soc: fsl: dpio: add congestion notification support
Date
Add support for Congestion State Change Notifications (CSCN), which
allow DPIO users to be notified when a congestion group changes its
state (due to hitting the entrance / exit threshold).

Acked-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
---
include/soc/fsl/dpaa2-global.h | 15 +++++++++++++++
1 file changed, 15 insertions(+)

diff --git a/include/soc/fsl/dpaa2-global.h b/include/soc/fsl/dpaa2-global.h
index 9bc0713346a8..2bfc379d3dc9 100644
--- a/include/soc/fsl/dpaa2-global.h
+++ b/include/soc/fsl/dpaa2-global.h
@@ -174,4 +174,19 @@ static inline const struct dpaa2_fd *dpaa2_dq_fd(const struct dpaa2_dq *dq)
return (const struct dpaa2_fd *)&dq->dq.fd[0];
}

+#define DPAA2_CSCN_SIZE sizeof(struct dpaa2_dq)
+#define DPAA2_CSCN_ALIGN 16
+#define DPAA2_CSCN_STATE_CG BIT(0)
+
+/**
+ * dpaa2_cscn_state_congested() - Check congestion state
+ * @cscn: congestion SCN (delivered to WQ or memory)
+ *
+i * Return true is congested.
+ */
+static inline bool dpaa2_cscn_state_congested(struct dpaa2_dq *cscn)
+{
+ return !!(cscn->scn.state & DPAA2_CSCN_STATE_CG);
+}
+
#endif /* __FSL_DPAA2_GLOBAL_H */
--
2.16.2
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