From patchwork Mon Dec 19 14:46:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 13076681 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 CBE02C4708D for ; Mon, 19 Dec 2022 14:47:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232169AbiLSOrq (ORCPT ); Mon, 19 Dec 2022 09:47:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47318 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231938AbiLSOrV (ORCPT ); Mon, 19 Dec 2022 09:47:21 -0500 Received: from post.baikalelectronics.com (post.baikalelectronics.com [213.79.110.86]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id CC6A2DF3F; Mon, 19 Dec 2022 06:47:07 -0800 (PST) Received: from post.baikalelectronics.com (localhost.localdomain [127.0.0.1]) by post.baikalelectronics.com (Proxmox) with ESMTP id 069B7E0EB6; Mon, 19 Dec 2022 17:47:07 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= baikalelectronics.ru; h=cc:cc:content-transfer-encoding :content-type:content-type:date:from:from:in-reply-to:message-id :mime-version:references:reply-to:subject:subject:to:to; s=post; bh=wQDGlXtR0T6fGYFp6Rn98xoC9dALb52VWLv6gbMrfRw=; b=Wzi/4U2JxREo obO5Vo41LheB3GGXRhkmq6WJ/zFHd4jUxdvgNkjrgeexEQeB3Lc2nSLWnuQhZcb4 i6zYIo7RILCCuAaN6MIctw/bzItuh+UlBsTlf321p0whKioFUVlMjeLgqo4+GIsp zVz+GpqQwcIPuDPHSr9e4CtbXgHryqg= Received: from mail.baikal.int (mail.baikal.int [192.168.51.25]) by post.baikalelectronics.com (Proxmox) with ESMTP id EFAFEE0E70; Mon, 19 Dec 2022 17:47:06 +0300 (MSK) Received: from localhost (10.8.30.14) by mail (192.168.51.25) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 19 Dec 2022 17:47:06 +0300 From: Serge Semin To: Gustavo Pimentel , Vinod Koul , Rob Herring , Bjorn Helgaas , Lorenzo Pieralisi , Cai Huoqing , Robin Murphy , Jingoo Han , Frank Li , Manivannan Sadhasivam CC: Serge Semin , Serge Semin , Alexey Malahov , Pavel Parkhomenko , =?utf-8?q?Krzys?= =?utf-8?q?ztof_Wilczy=C5=84ski?= , caihuoqing , Yoshihiro Shimoda , , , , Gustavo Pimentel Subject: [PATCH v8 08/26] dmaengine: dw-edma: Add PCIe bus address getter to the remote EP glue-driver Date: Mon, 19 Dec 2022 17:46:39 +0300 Message-ID: <20221219144658.26620-9-Sergey.Semin@baikalelectronics.ru> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221219144658.26620-1-Sergey.Semin@baikalelectronics.ru> References: <20221219144658.26620-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-Originating-IP: [10.8.30.14] X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org In general the Synopsys PCIe EndPoint IP prototype kit can be attached to a PCIe bus with any PCIe Host controller including to the one with distinctive from CPU address space. Due to that we need to make sure that the source and destination addresses of the DMA-slave devices are properly converted to the PCIe bus address space, otherwise the DMA transaction will not only work as expected, but may cause the memory corruption with subsequent system crash. Let's do that by introducing a new dw_edma_pcie_address() method defined in the dw-edma-pcie.c, which will perform the denoted translation by using the pcibios_resource_to_bus() method. Fixes: 41aaff2a2ac0 ("dmaengine: Add Synopsys eDMA IP PCIe glue-logic") Signed-off-by: Serge Semin Reviewed-by: Manivannan Sadhasivam Tested-by: Manivannan Sadhasivam Acked-by: Vinod Koul --- Note this patch depends on the patch "dmaengine: dw-edma: Add CPU to PCIe bus address translation" from this series. --- drivers/dma/dw-edma/dw-edma-pcie.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c index 04c95cba1244..f530bacfd716 100644 --- a/drivers/dma/dw-edma/dw-edma-pcie.c +++ b/drivers/dma/dw-edma/dw-edma-pcie.c @@ -95,8 +95,23 @@ static int dw_edma_pcie_irq_vector(struct device *dev, unsigned int nr) return pci_irq_vector(to_pci_dev(dev), nr); } +static u64 dw_edma_pcie_address(struct device *dev, phys_addr_t cpu_addr) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct pci_bus_region region; + struct resource res = { + .flags = IORESOURCE_MEM, + .start = cpu_addr, + .end = cpu_addr, + }; + + pcibios_resource_to_bus(pdev->bus, ®ion, &res); + return region.start; +} + static const struct dw_edma_core_ops dw_edma_pcie_core_ops = { .irq_vector = dw_edma_pcie_irq_vector, + .pci_address = dw_edma_pcie_address, }; static void dw_edma_pcie_get_vsec_dma_data(struct pci_dev *pdev,