On Wednesday, October 28, 2015 09:54:23 PM Hanjun Guo wrote: > Hi Rafael, > > On 10/27/2015 11:27 PM, Rafael J. Wysocki wrote: > > On Tuesday, October 27, 2015 09:52:50 AM Bjorn Helgaas wrote: > >> Hi Suravee, > >> > >> On Wed, Oct 21, 2015 at 08:52:03AM -0700, Suravee Suthikulpanit wrote: > >>> This patch series 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 process, this series also introduces enum dev_dma_attr and a set > >>> of APIs to query device DMA attribute. These APIs replace the obsolete > >>> device_dma_is_coherent(), and acpi_check_dma(). > >>> > >>> I have also included a patch from Jeremy posted here: > >>> http://www.spinics.net/lists/linux-usb/msg128582.html > >>> > >>> This patch series has been tested on AMD Seattle RevB platform. > >>> The git tree containing tested code and pre-req patches are posted here: > >>> > >>> http://github.com/ssuthiku/linux.git pci-cca-v4 > >>> > >>> Changes from V3: (https://lkml.org/lkml/2015/8/26/389) > >>> * Clean up suggested by Bjorn > >>> * Introduce enum dev_dma_attr > >>> * Replace device_dma_is_coherent() and acpi_check_dma() with > >>> new APIs. > >>> > >>> 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 (7): > >>> device property: Introducing enum dev_dma_attr > >>> acpi: Adding DMA Attribute APIs for ACPI Device > >>> device property: Adding DMA Attribute APIs for Generic Devices > >>> device property: acpi: Make use of the new DMA Attribute APIs > >>> device property: acpi: Remove unused DMA APIs > >>> 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 | 8 +++--- > >>> drivers/acpi/scan.c | 42 +++++++++++++++++++++++++++++++ > >>> drivers/base/property.c | 32 +++++++++++++++++------ > >>> drivers/crypto/ccp/ccp-platform.c | 9 ++++++- > >>> drivers/net/ethernet/amd/xgbe/xgbe-main.c | 9 ++++++- > >>> drivers/of/of_pci.c | 20 --------------- > >>> drivers/pci/probe.c | 36 ++++++++++++++++++++++++-- > >>> include/acpi/acpi_bus.h | 36 +++----------------------- > >>> include/linux/acpi.h | 7 +++++- > >>> include/linux/of_pci.h | 3 --- > >>> include/linux/property.h | 10 +++++++- > >>> 12 files changed, 145 insertions(+), 74 deletions(-) > >> > >> I had a couple minor comments. It's sort of a toss-up, but this feels > >> more ACPI-flavored than PCI, so I assume Rafael will take this whole > >> series unless I hear otherwise. > > > > I'll do that. > > If Suravee address the comments and send another version, > an it be merged into 4.4? Well, it is likely, but not guaranteed. We're only a few days from the beginning of the merge window and I'm still in Seoul. Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
