From nobody Sun Apr 12 05:51:32 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 75A6FC19F2B for ; Tue, 2 Aug 2022 10:15:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236563AbiHBKPd (ORCPT ); Tue, 2 Aug 2022 06:15:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56548 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236421AbiHBKPb (ORCPT ); Tue, 2 Aug 2022 06:15:31 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 432A11D0DD; Tue, 2 Aug 2022 03:15:29 -0700 (PDT) Received: from dggemv711-chm.china.huawei.com (unknown [172.30.72.57]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4LxrRb5K0fzmVcP; Tue, 2 Aug 2022 18:13:31 +0800 (CST) Received: from kwepemm600007.china.huawei.com (7.193.23.208) by dggemv711-chm.china.huawei.com (10.1.198.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Tue, 2 Aug 2022 18:15:27 +0800 Received: from localhost.localdomain (10.69.192.56) by kwepemm600007.china.huawei.com (7.193.23.208) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Tue, 2 Aug 2022 18:15:27 +0800 From: Jie Hai To: , CC: , , , Subject: [PATCH v4 1/7] dmaengine: hisilicon: Disable channels when unregister hisi_dma Date: Tue, 2 Aug 2022 18:12:20 +0800 Message-ID: <20220802101226.9005-2-haijie1@huawei.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20220802101226.9005-1-haijie1@huawei.com> References: <20220625074422.3479591-1-haijie1@huawei.com> <20220802101226.9005-1-haijie1@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.69.192.56] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemm600007.china.huawei.com (7.193.23.208) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" When hisi_dma is unloaded or unbinded, all of channels should be disabled. This patch disables DMA channels when driver is unloaded or unbinded. Fixes: e9f08b65250d ("dmaengine: hisilicon: Add Kunpeng DMA engine support") Signed-off-by: Jie Hai Acked-by: Zhou Wang --- drivers/dma/hisi_dma.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/drivers/dma/hisi_dma.c b/drivers/dma/hisi_dma.c index 43817ced3a3e..98bc488893cc 100644 --- a/drivers/dma/hisi_dma.c +++ b/drivers/dma/hisi_dma.c @@ -180,7 +180,8 @@ static void hisi_dma_reset_qp_point(struct hisi_dma_dev= *hdma_dev, u32 index) hisi_dma_chan_write(hdma_dev->base, HISI_DMA_CQ_HEAD_PTR, index, 0); } =20 -static void hisi_dma_reset_hw_chan(struct hisi_dma_chan *chan) +static void hisi_dma_reset_or_disable_hw_chan(struct hisi_dma_chan *chan, + bool disable) { struct hisi_dma_dev *hdma_dev =3D chan->hdma_dev; u32 index =3D chan->qp_num, tmp; @@ -201,8 +202,11 @@ static void hisi_dma_reset_hw_chan(struct hisi_dma_cha= n *chan) hisi_dma_do_reset(hdma_dev, index); hisi_dma_reset_qp_point(hdma_dev, index); hisi_dma_pause_dma(hdma_dev, index, false); - hisi_dma_enable_dma(hdma_dev, index, true); - hisi_dma_unmask_irq(hdma_dev, index); + + if (!disable) { + hisi_dma_enable_dma(hdma_dev, index, true); + hisi_dma_unmask_irq(hdma_dev, index); + } =20 ret =3D readl_relaxed_poll_timeout(hdma_dev->base + HISI_DMA_Q_FSM_STS + index * HISI_DMA_OFFSET, tmp, @@ -218,7 +222,7 @@ static void hisi_dma_free_chan_resources(struct dma_cha= n *c) struct hisi_dma_chan *chan =3D to_hisi_dma_chan(c); struct hisi_dma_dev *hdma_dev =3D chan->hdma_dev; =20 - hisi_dma_reset_hw_chan(chan); + hisi_dma_reset_or_disable_hw_chan(chan, false); vchan_free_chan_resources(&chan->vc); =20 memset(chan->sq, 0, sizeof(struct hisi_dma_sqe) * hdma_dev->chan_depth); @@ -394,7 +398,7 @@ static void hisi_dma_enable_qp(struct hisi_dma_dev *hdm= a_dev, u32 qp_index) =20 static void hisi_dma_disable_qp(struct hisi_dma_dev *hdma_dev, u32 qp_inde= x) { - hisi_dma_reset_hw_chan(&hdma_dev->chan[qp_index]); + hisi_dma_reset_or_disable_hw_chan(&hdma_dev->chan[qp_index], true); } =20 static void hisi_dma_enable_qps(struct hisi_dma_dev *hdma_dev) --=20 2.33.0