From nobody Thu Dec 18 18:39:52 2025 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 1A6A7C7619A for ; Sat, 15 Apr 2023 10:50:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230371AbjDOKtq (ORCPT ); Sat, 15 Apr 2023 06:49:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49260 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230400AbjDOKtY (ORCPT ); Sat, 15 Apr 2023 06:49:24 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E74F2B45A; Sat, 15 Apr 2023 03:49:02 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id DD95B617CB; Sat, 15 Apr 2023 10:47:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 59C93C4339E; Sat, 15 Apr 2023 10:47:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1681555626; bh=BENT+Gyh2C5823xlOfoa81398QX+6CAqsChvkHIBGOc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=G9Z09GtImEFma9YsVLp8pqsVAXgSSZeb7PK9XDKvDsX/8TNFRMF64iQ7FuSF7C4B/ /EVWJi9OkaXJ+s2avyrsGmbV1c1jHD48WR4+HdyXnCwlhdbun3IVXtUT1FpF8/u6Qu 8RMPfSEk7vWmejNwXe2i0+oowX5qAxIHllQ7TI9/Ejd1DlMqTRSaskehElLrlW8htx teYYhZ0HjNcuadIzAuackkhVZYhgYlmF/vsdrAejSlZQUesc0E1vqQ+M+XQXMX7Hf8 oIqQdxNB4c9PnvF3Ur182weJ+zJg5TyriBlMIrVEL3on5rYytMqJDppcntFO2E94iu B0H/mCqV1IC+g== From: Jisheng Zhang To: Eugeniy Paltsev , Vinod Koul Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 07/11] dmaengine: dw-axi-dmac: support per channel irq Date: Sat, 15 Apr 2023 18:35:57 +0800 Message-Id: <20230415103601.2979-8-jszhang@kernel.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230415103601.2979-1-jszhang@kernel.org> References: <20230415103601.2979-1-jszhang@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Each channel can have its own irq, support this case. Signed-off-by: Jisheng Zhang --- .../dma/dw-axi-dmac/dw-axi-dmac-platform.c | 48 +++++++++++++++---- drivers/dma/dw-axi-dmac/dw-axi-dmac.h | 2 + 2 files changed, 42 insertions(+), 8 deletions(-) diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/d= w-axi-dmac/dw-axi-dmac-platform.c index 796fd0136781..edb1c089a8eb 100644 --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c @@ -1141,6 +1141,21 @@ static irqreturn_t dw_axi_dma_interrupt(int irq, voi= d *dev_id) return IRQ_HANDLED; } =20 +static irqreturn_t dw_axi_dma_ch_interrupt(int irq, void *dev_id) +{ + struct axi_dma_chan *chan =3D dev_id; + + /* Disable DMAC interrupts. We'll enable them after processing channels */ + axi_chan_irq_sig_set(chan, DWAXIDMAC_IRQ_NONE); + + dw_axi_dma_handle_ch(chan); + + /* Re-enable interrupts */ + axi_chan_irq_sig_set(chan, DWAXIDMAC_IRQ_DMA_TRF | DWAXIDMAC_IRQ_ALL_ERR); + + return IRQ_HANDLED; +} + static int dma_chan_terminate_all(struct dma_chan *dchan) { struct axi_dma_chan *chan =3D dchan_to_axi_dma_chan(dchan); @@ -1375,6 +1390,8 @@ static int parse_device_properties(struct axi_dma_chi= p *chip) chip->dw->hdata->axi_rw_burst_len =3D tmp; } =20 + chip->dw->hdata->perch_irq =3D device_property_read_bool(dev, "snps,perch= _irq"); + return 0; } =20 @@ -1430,14 +1447,29 @@ static int dw_probe(struct platform_device *pdev) if (!dw->chan) return -ENOMEM; =20 - chip->irq =3D platform_get_irq(pdev, 0); - if (chip->irq < 0) - return chip->irq; - - ret =3D devm_request_irq(chip->dev, chip->irq, dw_axi_dma_interrupt, - IRQF_SHARED, KBUILD_MODNAME, chip); - if (ret) - return ret; + if (hdata->perch_irq) { + char irqname[8]; + for (i =3D 0; i < hdata->nr_channels; i++) { + snprintf(irqname, sizeof(irqname), "ch%u", i); + dw->chan[i].irq =3D platform_get_irq_byname(pdev, irqname); + if (dw->chan[i].irq < 0) + return dw->chan[i].irq; + ret =3D devm_request_irq(chip->dev, dw->chan[i].irq, + dw_axi_dma_ch_interrupt, + 0, KBUILD_MODNAME, &dw->chan[i]); + if (ret) + return ret; + } + } else { + chip->irq =3D platform_get_irq(pdev, 0); + if (chip->irq < 0) + return chip->irq; + + ret =3D devm_request_irq(chip->dev, chip->irq, dw_axi_dma_interrupt, + IRQF_SHARED, KBUILD_MODNAME, chip); + if (ret) + return ret; + } =20 INIT_LIST_HEAD(&dw->dma.channels); for (i =3D 0; i < hdata->nr_channels; i++) { diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h b/drivers/dma/dw-axi-dma= c/dw-axi-dmac.h index e9d5eb0fd594..83ac839b4394 100644 --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h @@ -33,6 +33,7 @@ struct dw_axi_dma_hcfg { /* Register map for DMAX_NUM_CHANNELS <=3D 8 */ bool reg_map_8_channels; bool restrict_axi_burst_len; + bool perch_irq; }; =20 struct axi_dma_chan { @@ -48,6 +49,7 @@ struct axi_dma_chan { struct axi_dma_desc *desc; struct dma_slave_config config; enum dma_transfer_direction direction; + int irq; bool cyclic; /* these other elements are all protected by vc.lock */ bool is_paused; --=20 2.39.2