From: =?UTF-8?q?Horia=20Geant=C4=83?= Subject: [PATCH v2 04/12] soc: fsl: dpio: add congestion notification support Date: Wed, 12 Sep 2018 11:59:29 +0300 Message-ID: <20180912085937.22489-5-horia.geanta@nxp.com> References: <20180912085937.22489-1-horia.geanta@nxp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: "David S . Miller" , Aymen Sghaier , linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org To: Herbert Xu , Stuart Yoder , Laurentiu Tudor , Li Yang , Roy Pledge , Catalin Marinas , Will Deacon Return-path: In-Reply-To: <20180912085937.22489-1-horia.geanta@nxp.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org 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 Signed-off-by: Horia Geantă --- 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