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Mon, 17 Feb 2020 01:29:34 -0800 Received: from MTKMBS07N2.mediatek.inc (172.21.101.141) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 17 Feb 2020 01:29:52 -0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs07n2.mediatek.inc (172.21.101.141) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 17 Feb 2020 17:28:46 +0800 Received: from [172.21.77.4] (172.21.77.4) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 17 Feb 2020 17:27:27 +0800 Message-ID: <1581931765.12547.0.camel@mtksdaap41> Subject: Re: [PATCH v1 2/3] mailbox: mediatek: implement flush function From: CK Hu To: Bibby Hsieh Date: Mon, 17 Feb 2020 17:29:25 +0800 In-Reply-To: <20200217090532.16019-3-bibby.hsieh@mediatek.com> References: <20200217090532.16019-1-bibby.hsieh@mediatek.com> <20200217090532.16019-3-bibby.hsieh@mediatek.com> X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200217_012937_986872_EFFEB178 X-CRM114-Status: GOOD ( 15.22 ) 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, Jassi Brar , linux-kernel@vger.kernel.org, Houlong Wei , Dennis-YC Hsieh , Rob Herring , linux-mediatek@lists.infradead.org, Matthias Brugger , 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 Hi, Bibby: On Mon, 2020-02-17 at 17:05 +0800, Bibby Hsieh wrote: > For client driver which need to reorganize the command buffer, it could > use this function to flush the send command buffer. > If the channel doesn't be started (usually in waiting for event), this > function will abort it directly. > Reviewed-by: CK Hu > Signed-off-by: Bibby Hsieh > --- > drivers/mailbox/mtk-cmdq-mailbox.c | 52 ++++++++++++++++++++++++++++++ > 1 file changed, 52 insertions(+) > > diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c > index 9a6ce9f5a7db..0da5e2dc2c0e 100644 > --- a/drivers/mailbox/mtk-cmdq-mailbox.c > +++ b/drivers/mailbox/mtk-cmdq-mailbox.c > @@ -432,10 +432,62 @@ static void cmdq_mbox_shutdown(struct mbox_chan *chan) > { > } > > +static int cmdq_mbox_flush(struct mbox_chan *chan, unsigned long timeout) > +{ > + struct cmdq_thread *thread = (struct cmdq_thread *)chan->con_priv; > + struct cmdq_task_cb *cb; > + struct cmdq_cb_data data; > + struct cmdq *cmdq = dev_get_drvdata(chan->mbox->dev); > + struct cmdq_task *task, *tmp; > + unsigned long flags; > + u32 enable; > + > + spin_lock_irqsave(&thread->chan->lock, flags); > + if (list_empty(&thread->task_busy_list)) > + goto out; > + > + WARN_ON(cmdq_thread_suspend(cmdq, thread) < 0); > + if (!cmdq_thread_is_in_wfe(thread)) > + goto wait; > + > + list_for_each_entry_safe(task, tmp, &thread->task_busy_list, > + list_entry) { > + cb = &task->pkt->async_cb; > + if (cb->cb) { > + data.sta = CMDQ_CB_ERROR; > + data.data = cb->data; > + cb->cb(data); > + } > + list_del(&task->list_entry); > + kfree(task); > + } > + > + cmdq_thread_resume(thread); > + cmdq_thread_disable(cmdq, thread); > + clk_disable(cmdq->clock); > + > +out: > + spin_unlock_irqrestore(&thread->chan->lock, flags); > + return 0; > + > +wait: > + cmdq_thread_resume(thread); > + spin_unlock_irqrestore(&thread->chan->lock, flags); > + if (readl_poll_timeout_atomic(thread->base + CMDQ_THR_ENABLE_TASK, > + enable, enable == 0, 1, timeout)) { > + dev_err(cmdq->mbox.dev, "Fail to wait GCE thread 0x%x done\n", > + (u32)(thread->base - cmdq->base)); > + > + return -EFAULT; > + } > + return 0; > +} > + > static const struct mbox_chan_ops cmdq_mbox_chan_ops = { > .send_data = cmdq_mbox_send_data, > .startup = cmdq_mbox_startup, > .shutdown = cmdq_mbox_shutdown, > + .flush = cmdq_mbox_flush, > }; > > static struct mbox_chan *cmdq_xlate(struct mbox_controller *mbox, _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel