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Thu, 24 Oct 2019 13:27:33 +0800 From: Bibby Hsieh To: Jassi Brar , Matthias Brugger , Rob Herring , CK HU Subject: [PATCH v16 3/5] soc: mediatek: cmdq: add polling function Date: Thu, 24 Oct 2019 13:27:30 +0800 Message-ID: <20191024052732.7767-4-bibby.hsieh@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20191024052732.7767-1-bibby.hsieh@mediatek.com> References: <20191024052732.7767-1-bibby.hsieh@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191023_222802_399100_BAE01041 X-CRM114-Status: GOOD ( 11.82 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Nicolas Boichat , srv_heupstream@mediatek.com, linux-kernel@vger.kernel.org, Houlong Wei , Dennis-YC Hsieh , linux-mediatek@lists.infradead.org, Bibby Hsieh , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org add polling function in cmdq helper functions Signed-off-by: Bibby Hsieh --- drivers/soc/mediatek/mtk-cmdq-helper.c | 35 ++++++++++++++++++++++++ include/linux/mailbox/mtk-cmdq-mailbox.h | 1 + include/linux/soc/mediatek/mtk-cmdq.h | 32 ++++++++++++++++++++++ 3 files changed, 68 insertions(+) diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c index 11bfcc150ebd..8743c6ae7ac5 100644 --- a/drivers/soc/mediatek/mtk-cmdq-helper.c +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c @@ -214,6 +214,41 @@ int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event) } EXPORT_SYMBOL(cmdq_pkt_clear_event); +int cmdq_pkt_poll(struct cmdq_pkt *pkt, u8 subsys, + u16 offset, u32 value) +{ + struct cmdq_instruction inst = { {0} }; + int err; + + inst.op = CMDQ_CODE_POLL; + inst.value = value; + inst.offset = offset; + inst.subsys = subsys; + err = cmdq_pkt_append_command(pkt, inst); + + return err; +} +EXPORT_SYMBOL(cmdq_pkt_poll); + +int cmdq_pkt_poll_mask(struct cmdq_pkt *pkt, u8 subsys, + u16 offset, u32 value, u32 mask) +{ + struct cmdq_instruction inst = { {0} }; + int err; + + inst.op = CMDQ_CODE_MASK; + inst.mask = ~mask; + err = cmdq_pkt_append_command(pkt, inst); + if (err < 0) + return err; + + offset = offset | 0x1; + err = cmdq_pkt_poll(pkt, subsys, offset, value); + + return err; +} +EXPORT_SYMBOL(cmdq_pkt_poll_mask); + static int cmdq_pkt_finalize(struct cmdq_pkt *pkt) { struct cmdq_instruction inst = { {0} }; diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h index 678760548791..a4dc45fbec0a 100644 --- a/include/linux/mailbox/mtk-cmdq-mailbox.h +++ b/include/linux/mailbox/mtk-cmdq-mailbox.h @@ -55,6 +55,7 @@ enum cmdq_code { CMDQ_CODE_MASK = 0x02, CMDQ_CODE_WRITE = 0x04, + CMDQ_CODE_POLL = 0x08, CMDQ_CODE_JUMP = 0x10, CMDQ_CODE_WFE = 0x20, CMDQ_CODE_EOC = 0x40, diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h index 9618debb9ceb..92bd5b5c6341 100644 --- a/include/linux/soc/mediatek/mtk-cmdq.h +++ b/include/linux/soc/mediatek/mtk-cmdq.h @@ -99,6 +99,38 @@ int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event); */ int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event); +/** + * cmdq_pkt_poll() - Append polling command to the CMDQ packet, ask GCE to + * execute an instruction that wait for a specified + * hardware register to check for the value w/o mask. + * All GCE hardware threads will be blocked by this + * instruction. + * @pkt: the CMDQ packet + * @subsys: the CMDQ sub system code + * @offset: register offset from CMDQ sub system + * @value: the specified target register value + * + * Return: 0 for success; else the error code is returned + */ +int cmdq_pkt_poll(struct cmdq_pkt *pkt, u8 subsys, + u16 offset, u32 value); + +/** + * cmdq_pkt_poll_mask() - Append polling command to the CMDQ packet, ask GCE to + * execute an instruction that wait for a specified + * hardware register to check for the value w/ mask. + * All GCE hardware threads will be blocked by this + * instruction. + * @pkt: the CMDQ packet + * @subsys: the CMDQ sub system code + * @offset: register offset from CMDQ sub system + * @value: the specified target register value + * @mask: the specified target register mask + * + * Return: 0 for success; else the error code is returned + */ +int cmdq_pkt_poll_mask(struct cmdq_pkt *pkt, u8 subsys, + u16 offset, u32 value, u32 mask); /** * cmdq_pkt_flush_async() - trigger CMDQ to asynchronously execute the CMDQ * packet and call back at the end of done packet -- 2.18.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel