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Lin" , Singo Chang , Nancy Lin , Shawn Sung , , , , Subject: [RESEND, PATCH 4/5] soc: mediatek: mtk-cmdq: Add cmdq_pkt_acquire_event() function Date: Fri, 1 Mar 2024 22:44:02 +0800 Message-ID: <20240301144403.2977-5-jason-jh.lin@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20240301144403.2977-1-jason-jh.lin@mediatek.com> References: <20240301144403.2977-1-jason-jh.lin@mediatek.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MTK: N Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add cmdq_pkt_acquire_event() function to support CMDQ user making an instruction for acquiring event. CMDQ users can use cmdq_pkt_acquire_event() and cmdq_pkt_clear_event() to acquire GCE event and release GCE event and achieve the MUTEX_LOCK protection between GCE threads. Signed-off-by: Jason-JH.Lin --- drivers/soc/mediatek/mtk-cmdq-helper.c | 15 +++++++++++++++ include/linux/soc/mediatek/mtk-cmdq.h | 9 +++++++++ 2 files changed, 24 insertions(+) diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/= mtk-cmdq-helper.c index 2e9fc9bb1183..0183b40a0eff 100644 --- a/drivers/soc/mediatek/mtk-cmdq-helper.c +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c @@ -342,6 +342,21 @@ int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event, bool= clear) } EXPORT_SYMBOL(cmdq_pkt_wfe); =20 +int cmdq_pkt_acquire_event(struct cmdq_pkt *pkt, u16 event) +{ + struct cmdq_instruction inst =3D {}; + + if (event >=3D CMDQ_MAX_EVENT) + return -EINVAL; + + inst.op =3D CMDQ_CODE_WFE; + inst.value =3D CMDQ_WFE_UPDATE | CMDQ_WFE_UPDATE_VALUE | CMDQ_WFE_WAIT; + inst.event =3D event; + + return cmdq_pkt_append_command(pkt, inst); +} +EXPORT_SYMBOL(cmdq_pkt_acquire_event); + int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event) { struct cmdq_instruction inst =3D { {0} }; diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/medi= atek/mtk-cmdq.h index 2fe9be240fbc..de93c0a8e8a9 100644 --- a/include/linux/soc/mediatek/mtk-cmdq.h +++ b/include/linux/soc/mediatek/mtk-cmdq.h @@ -202,6 +202,15 @@ int cmdq_pkt_mem_move(struct cmdq_pkt *pkt, dma_addr_t= src_addr, dma_addr_t dst_ */ int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event, bool clear); =20 +/** + * cmdq_pkt_acquire_event() - append acquire event command to the CMDQ pac= ket + * @pkt: the CMDQ packet + * @event: the desired event to be acquired + * + * Return: 0 for success; else the error code is returned + */ +int cmdq_pkt_acquire_event(struct cmdq_pkt *pkt, u16 event); + /** * cmdq_pkt_clear_event() - append clear event command to the CMDQ packet * @pkt: the CMDQ packet --=20 2.18.0