From patchwork Thu Mar 24 01:48:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 12793934 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 0F4F7C433F5 for ; Mon, 28 Mar 2022 16:44:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243277AbiC1QqO (ORCPT ); Mon, 28 Mar 2022 12:46:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45146 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242935AbiC1QqE (ORCPT ); Mon, 28 Mar 2022 12:46:04 -0400 Received: from mail.baikalelectronics.ru (mail.baikalelectronics.com [87.245.175.226]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 76B17222A1; Mon, 28 Mar 2022 09:44:17 -0700 (PDT) Received: from mail.baikalelectronics.ru (unknown [192.168.51.25]) by mail.baikalelectronics.ru (Postfix) with ESMTP id 8C8691E493D; Thu, 24 Mar 2022 04:48:40 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 mail.baikalelectronics.ru 8C8691E493D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baikalelectronics.ru; s=mail; t=1648086520; bh=AYgCGlj6XCp3KD2/KUlHJg+55HiFo50ys5cdSY8nwOc=; h=From:To:CC:Subject:Date:In-Reply-To:References:From; b=Gdpk4DVTE1MY+dgZ0kGVMp67RyX8d1SyCg2QO2NJHj25IYEGxOxb8VC4cSyQcFRx4 sxb20q0ugu4aEjTmpg69ImHd3ruWyaaxda/H8iMTCWfSg/qZlBV6hI7F5qPAIl5pvM TH40nEUw788A0bI+6t728iRMW+6lqKWGI7yOKtds= Received: from localhost (192.168.168.10) by mail (192.168.51.25) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 24 Mar 2022 04:48:40 +0300 From: Serge Semin To: Gustavo Pimentel , Vinod Koul , Jingoo Han , Bjorn Helgaas , Frank Li , Manivannan Sadhasivam , Christoph Hellwig , Marek Szyprowski , Robin Murphy , Vladimir Murzin CC: Serge Semin , Serge Semin , Alexey Malahov , Pavel Parkhomenko , Lorenzo Pieralisi , Rob Herring , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , , , , Subject: [PATCH 03/25] dma-direct: take dma-ranges/offsets into account in resource mapping Date: Thu, 24 Mar 2022 04:48:14 +0300 Message-ID: <20220324014836.19149-4-Sergey.Semin@baikalelectronics.ru> In-Reply-To: <20220324014836.19149-1-Sergey.Semin@baikalelectronics.ru> References: <20220324014836.19149-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 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 A basic device-specific linear memory mapping was introduced back in commit ("dma: Take into account dma_pfn_offset") as a single-valued offset preserved in the device.dma_pfn_offset field, which was initialized for instance by means of the "dma-ranges" DT property. Afterwards the functionality was extended to support more than one device-specific region defined in the device.dma_range_map list of maps. But all of these improvements concerned a single pointer, page or sg DMA-mapping methods, while the system resource mapping function turned to miss the corresponding modification. Thus the dma_direct_map_resource() method now just casts the CPU physical address to the device DMA address with no dma-ranges-based mapping taking into account, which is obviously wrong. Let's fix it by using the phys_to_dma_direct() method to get the device-specific bus address from the passed memory resource for the case of the directly mapped DMA. Fixes: 25f1e1887088 ("dma: Take into account dma_pfn_offset") Signed-off-by: Serge Semin --- kernel/dma/direct.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index 50f48e9e4598..9ce8192b29ab 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -497,7 +497,7 @@ int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents, dma_addr_t dma_direct_map_resource(struct device *dev, phys_addr_t paddr, size_t size, enum dma_data_direction dir, unsigned long attrs) { - dma_addr_t dma_addr = paddr; + dma_addr_t dma_addr = phys_to_dma_direct(dev, paddr); if (unlikely(!dma_capable(dev, dma_addr, size, false))) { dev_err_once(dev,