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 <hanjun....@linaro.org> Thanks Hanjun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
