From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f54.google.com ([209.85.220.54]:36210 "EHLO mail-pa0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751227AbbIJJP5 (ORCPT ); Thu, 10 Sep 2015 05:15:57 -0400 Received: by padhk3 with SMTP id hk3so37689758pad.3 for ; Thu, 10 Sep 2015 02:15:57 -0700 (PDT) Message-ID: <55F14A4E.80206@linaro.org> Date: Thu, 10 Sep 2015 17:15:58 +0800 From: Hanjun Guo MIME-Version: 1.0 To: Suravee Suthikulpanit , bhelgaas@google.com, rjw@rjwysocki.net, lenb@kernel.org, catalin.marinas@arm.com, will.deacon@arm.com CC: linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH V3 0/4] PCI: ACPI: Setting up DMA coherency for PCI device from _CCA attribute References: <1440597279-11802-1-git-send-email-Suravee.Suthikulpanit@amd.com> In-Reply-To: <1440597279-11802-1-git-send-email-Suravee.Suthikulpanit@amd.com> Content-Type: text/plain; charset=windows-1252; format=flowed Sender: linux-pci-owner@vger.kernel.org List-ID: On 08/26/2015 09:54 PM, Suravee Suthikulpanit wrote: > This patch adds support to setup DMA coherency for PCI device using > the ACPI _CCA attribute. According to the ACPI spec, the _CCA attribute > is required for ARM64. Therefore, this patch is a pre-req for ACPI PCI > support for ARM64 which is currently in development. > > Also, this should not affect other architectures that does not define > CONFIG_ACPI_CCA_REQUIRED, since the default value is coherent. > > I have included the following patch from Jeremy before cleaning up > the acpi_check_dma() function (in patch 2). > > http://www.spinics.net/lists/linux-usb/msg128582.html) > > Changes from V2: (https://lkml.org/lkml/2015/8/25/549) > * Return -ENOSUPP instead of -1 (per Rafael's suggestion) > * Add WARN() when fail to setup DMA for PCI device when booting > ACPI (per Arnd's suggestion) > * Added Acked-by from Rob. > * Minor clean up > > Changes from V1: (https://lkml.org/lkml/2015/8/13/182) > * Include patch 1 from Jeremy to enable support for _CCA=0 > * Clean up acpi_check_dma() per Bjorn suggestions > * Split the original V1 patch into two patches (patch 3 and 4) > > > Jeremy Linton (1): > Honor ACPI _CCA attribute setting > > Suravee Suthikulpanit (3): > ACPI/scan: Clean up acpi_check_dma > PCI: OF: Move of_pci_dma_configure() to pci_dma_configure() > PCI: ACPI: Add support for PCI device DMA coherency For this series, Reviewed-by: Hanjun Guo Thanks Hanjun