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soc: fsl: dpio: add congestion notification support

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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>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Horia Geantă 2018-09-12 11:59:29 +03:00 committed by Herbert Xu
parent 009447a038
commit 55d0110248
1 changed files with 15 additions and 0 deletions
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15
include/soc/fsl/dpaa2-global.h
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@ -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 */