From patchwork Mon Apr 12 11:18:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yongqiang Niu X-Patchwork-Id: 12197691 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 03B7EC43600 for ; Mon, 12 Apr 2021 11:19:10 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B4B9260FF1 for ; Mon, 12 Apr 2021 11:19:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B4B9260FF1 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0880B89C56; Mon, 12 Apr 2021 11:19:07 +0000 (UTC) Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by gabe.freedesktop.org (Postfix) with ESMTP id B15E689BFF for ; Mon, 12 Apr 2021 11:19:03 +0000 (UTC) X-UUID: 63d37990d44f4e08b516e8c97f3fc555-20210412 X-UUID: 63d37990d44f4e08b516e8c97f3fc555-20210412 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw02.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.14 Build 0819 with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1129355643; Mon, 12 Apr 2021 19:18:57 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs08n2.mediatek.inc (172.21.101.56) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 12 Apr 2021 19:18:55 +0800 Received: from localhost.localdomain (10.17.3.153) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Mon, 12 Apr 2021 19:18:54 +0800 From: Yongqiang Niu To: Chun-Kuang Hu Subject: [PATCH v2, 2/5] Revert "mailbox: mediatek: remove implementation related to atomic_exec" Date: Mon, 12 Apr 2021 19:18:42 +0800 Message-ID: <1618226325-31927-3-git-send-email-yongqiang.niu@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1618226325-31927-1-git-send-email-yongqiang.niu@mediatek.com> References: <1618226325-31927-1-git-send-email-yongqiang.niu@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: FFC2FDBF7FF001FC2B93517A177C20290575767D34FA3C2E67F281788FAD8C1F2000:8 X-MTK: N X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Project_Global_Chrome_Upstream_Group@mediatek.com, David Airlie , Jassi Brar , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Yongqiang Niu , Dennis YC Hsieh , Fabien Parent , Rob Herring , linux-mediatek@lists.infradead.org, Matthias Brugger , linux-arm-kernel@lists.infradead.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This reverts commit c9ea564f3d9dd20d88bd34f40a6ff6d31a0d7e8c. Signed-off-by: Yongqiang Niu --- drivers/mailbox/mtk-cmdq-mailbox.c | 80 +++++++++++++++++++++++++++++++++----- 1 file changed, 71 insertions(+), 9 deletions(-) diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c index 5665b6e..e0d9a86 100644 --- a/drivers/mailbox/mtk-cmdq-mailbox.c +++ b/drivers/mailbox/mtk-cmdq-mailbox.c @@ -56,6 +56,7 @@ struct cmdq_thread { void __iomem *base; struct list_head task_busy_list; u32 priority; + bool atomic_exec; }; struct cmdq_task { @@ -168,18 +169,56 @@ static void cmdq_task_insert_into_thread(struct cmdq_task *task) dma_sync_single_for_cpu(dev, prev_task->pa_base, prev_task->pkt->cmd_buf_size, DMA_TO_DEVICE); prev_task_base[CMDQ_NUM_CMD(prev_task->pkt) - 1] = - (u64)CMDQ_JUMP_BY_PA << 32 | task->pa_base; + (u64)CMDQ_JUMP_BY_PA << 32 | + (task->pa_base >> task->cmdq->shift_pa); dma_sync_single_for_device(dev, prev_task->pa_base, prev_task->pkt->cmd_buf_size, DMA_TO_DEVICE); cmdq_thread_invalidate_fetched_data(thread); } +static bool cmdq_command_is_wfe(u64 cmd) +{ + u64 wfe_option = CMDQ_WFE_UPDATE | CMDQ_WFE_WAIT | CMDQ_WFE_WAIT_VALUE; + u64 wfe_op = (u64)(CMDQ_CODE_WFE << CMDQ_OP_CODE_SHIFT) << 32; + u64 wfe_mask = (u64)CMDQ_OP_CODE_MASK << 32 | 0xffffffff; + + return ((cmd & wfe_mask) == (wfe_op | wfe_option)); +} + +/* we assume tasks in the same display GCE thread are waiting the same event. */ +static void cmdq_task_remove_wfe(struct cmdq_task *task) +{ + struct device *dev = task->cmdq->mbox.dev; + u64 *base = task->pkt->va_base; + int i; + + dma_sync_single_for_cpu(dev, task->pa_base, task->pkt->cmd_buf_size, + DMA_TO_DEVICE); + for (i = 0; i < CMDQ_NUM_CMD(task->pkt); i++) + if (cmdq_command_is_wfe(base[i])) + base[i] = (u64)CMDQ_JUMP_BY_OFFSET << 32 | + (CMDQ_JUMP_PASS >> task->cmdq->shift_pa); + dma_sync_single_for_device(dev, task->pa_base, task->pkt->cmd_buf_size, + DMA_TO_DEVICE); +} + static bool cmdq_thread_is_in_wfe(struct cmdq_thread *thread) { return readl(thread->base + CMDQ_THR_WAIT_TOKEN) & CMDQ_THR_IS_WAITING; } +static void cmdq_thread_wait_end(struct cmdq_thread *thread, + unsigned long end_pa) +{ + struct device *dev = thread->chan->mbox->dev; + unsigned long curr_pa; + + if (readl_poll_timeout_atomic(thread->base + CMDQ_THR_CURR_ADDR, + curr_pa, curr_pa == end_pa, 1, 20)) + dev_err(dev, "GCE thread cannot run to end.\n"); +} + static void cmdq_task_exec_done(struct cmdq_task *task, enum cmdq_cb_status sta) { struct cmdq_task_cb *cb = &task->pkt->async_cb; @@ -371,15 +410,37 @@ static int cmdq_mbox_send_data(struct mbox_chan *chan, void *data) cmdq->shift_pa; end_pa = readl(thread->base + CMDQ_THR_END_ADDR) << cmdq->shift_pa; - /* check boundary */ - if (curr_pa == end_pa - CMDQ_INST_SIZE || - curr_pa == end_pa) { - /* set to this task directly */ - writel(task->pa_base >> cmdq->shift_pa, - thread->base + CMDQ_THR_CURR_ADDR); + + /* + * Atomic execution should remove the following wfe, i.e. only + * wait event at first task, and prevent to pause when running. + */ + if (thread->atomic_exec) { + /* GCE is executing if command is not WFE */ + if (!cmdq_thread_is_in_wfe(thread)) { + cmdq_thread_resume(thread); + cmdq_thread_wait_end(thread, + end_pa >> cmdq->shift_pa); + WARN_ON(cmdq_thread_suspend(cmdq, thread) < 0); + /* set to this task directly */ + writel(task->pa_base >> cmdq->shift_pa, + thread->base + CMDQ_THR_CURR_ADDR); + } else { + cmdq_task_insert_into_thread(task); + cmdq_task_remove_wfe(task); + smp_mb(); /* modify jump before enable thread */ + } } else { - cmdq_task_insert_into_thread(task); - smp_mb(); /* modify jump before enable thread */ + /* check boundary */ + if (curr_pa == end_pa - CMDQ_INST_SIZE || + curr_pa == end_pa) { + /* set to this task directly */ + writel(task->pa_base >> cmdq->shift_pa, + thread->base + CMDQ_THR_CURR_ADDR); + } else { + cmdq_task_insert_into_thread(task); + smp_mb(); /* modify jump before enable thread */ + } } writel((task->pa_base + pkt->cmd_buf_size) >> cmdq->shift_pa, thread->base + CMDQ_THR_END_ADDR); @@ -500,6 +561,7 @@ static struct mbox_chan *cmdq_xlate(struct mbox_controller *mbox, thread = (struct cmdq_thread *)mbox->chans[ind].con_priv; thread->priority = sp->args[1]; + thread->atomic_exec = (sp->args[2] != 0); thread->chan = &mbox->chans[ind]; return &mbox->chans[ind];