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Thu, 28 Mar 2019 10:19:36 +0800 From: Bibby Hsieh To: Jassi Brar , Matthias Brugger , Rob Herring , CK HU Subject: [PATCH v3 09/12] soc: mediatek: cmdq: add polling function Date: Thu, 28 Mar 2019 10:19:30 +0800 Message-ID: <1553739573-19708-10-git-send-email-bibby.hsieh@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1553739573-19708-1-git-send-email-bibby.hsieh@mediatek.com> References: <1553739573-19708-1-git-send-email-bibby.hsieh@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 228A412A6FD40993DDDC54B45B777082A2473DD0EE5D266C67E69EF74B2F0D202000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190327_191946_677235_9B391FCD X-CRM114-Status: GOOD ( 13.03 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Nicolas Boichat , Philipp Zabel , srv_heupstream@mediatek.com, Daoyuan Huang , Sascha Hauer , linux-kernel@vger.kernel.org, Dennis-YC Hsieh , kendrick.hsu@mediatek.com, linux-mediatek@lists.infradead.org, Houlong Wei , Sascha Hauer , Frederic Chen , Jiaguang Zhang , Bibby Hsieh , linux-arm-kernel@lists.infradead.org, ginny.chen@mediatek.com Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP add polling function in cmdq helper functions Signed-off-by: Bibby Hsieh --- drivers/soc/mediatek/mtk-cmdq-helper.c | 30 ++++++++++++++++++++++++++++++ include/linux/mailbox/mtk-cmdq-mailbox.h | 1 + include/linux/soc/mediatek/mtk-cmdq.h | 15 +++++++++++++++ 3 files changed, 46 insertions(+) diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c index d3873ab..80856b8 100644 --- a/drivers/soc/mediatek/mtk-cmdq-helper.c +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c @@ -231,6 +231,36 @@ 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, u32 mask) +{ + int err; + + if (mask != 0xffffffff) { + err = cmdq_pkt_append_command(pkt, CMDQ_GET_ARG_C(~mask), + CMDQ_GET_ARG_B(~mask), + CMDQ_IMMEDIATE_VALUE, + CMDQ_IMMEDIATE_VALUE, + CMDQ_IMMEDIATE_VALUE, + CMDQ_IMMEDIATE_VALUE, + CMDQ_IMMEDIATE_VALUE, + CMDQ_CODE_MASK); + + if (err != 0) + return err; + } + offset = offset | 0x1; + + return cmdq_pkt_append_command(pkt, CMDQ_GET_ARG_C(value), + CMDQ_GET_ARG_B(value), + offset, subsys, + CMDQ_IMMEDIATE_VALUE, + CMDQ_IMMEDIATE_VALUE, + CMDQ_IMMEDIATE_VALUE, + CMDQ_CODE_POLL); +} +EXPORT_SYMBOL(cmdq_pkt_poll); + static int cmdq_pkt_finalize(struct cmdq_pkt *pkt) { int err; diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h index f21801d..1dfd5ed 100644 --- a/include/linux/mailbox/mtk-cmdq-mailbox.h +++ b/include/linux/mailbox/mtk-cmdq-mailbox.h @@ -46,6 +46,7 @@ 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 52f69c8..0651a0b 100644 --- a/include/linux/soc/mediatek/mtk-cmdq.h +++ b/include/linux/soc/mediatek/mtk-cmdq.h @@ -100,6 +100,21 @@ int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys, u16 offset, 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. 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(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 * @pkt: the CMDQ packet