From mboxrd@z Thu Jan 1 00:00:00 1970 From: Suravee Suthikulpanit Subject: [PATCH V2 0/4] PCI: ACPI: Setting up DMA coherency for PCI device from _CCA attribute Date: Wed, 26 Aug 2015 00:33:25 +0700 Message-ID: <1440524009-5359-1-git-send-email-Suravee.Suthikulpanit@amd.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Sender: linux-kernel-owner@vger.kernel.org To: bhelgaas@google.com, rjw@rjwysocki.net, lenb@kernel.org, catalin.marinas@arm.com, will.deacon@arm.com Cc: hanjun.guo@linaro.org, linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Suravee Suthikulpanit List-Id: linux-acpi@vger.kernel.org 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. In the V2 of this patch series, I have pulled in 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 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 drivers/acpi/acpi_platform.c | 7 ++++++- drivers/acpi/glue.c | 5 +++-- drivers/acpi/scan.c | 39 +++++++++++++++++++++++++++++++++++++++ drivers/base/property.c | 8 ++++++-- drivers/of/of_pci.c | 20 -------------------- drivers/pci/probe.c | 32 ++++++++++++++++++++++++++++++-- include/acpi/acpi_bus.h | 35 ++--------------------------------- include/linux/acpi.h | 4 ++-- include/linux/of_pci.h | 3 --- 9 files changed, 88 insertions(+), 65 deletions(-) -- 2.1.0