Hi all, As AMD carrizo UART device is compatible with 8250 and has pl330 DMA IP, our uart driver is serial:8250 and DMA engines are registered by driver/dma/pl330. The following patches are made, in order to enable DMA. Firstly, we add an universal ACPI amba glue layer to create an amba device based on ACPI table. Then we alter 8250/Kconfig to support AMD 8250 device and add quirk for AMD specific request. Secondly, since pl330 driver only provides dma engine for platform devices, we add an acpi dma engine interface. Then we add a new port type for AMD carrizo and set UART registers and dma rx size as hardware requirement. In the end, we make our IOMMU driver to support non-pci device, so UART DMA really works. Thanks, Hongcheng Huang Rui (1): ACPI: Add support for AMBA bus type Wan Zongshun (2): Documentation: Add ivrs_acpihid kernel parameter description iommu/amd: Add ACPI HID named devices IOMMU driver support Wang Hongcheng (6): 8250/Kconfig: add config option CONFIG_SERIAL_8250_AMD ACPI: add struct acpi_amba_quirk for AMD pl330 specific device config dmaengine: pl330: add new items for pl330 private data dmaengine: pl330: provide ACPI dmaengine interface dmaengine:pl330: set segment_boundary_mask = 0cffffffff Serial:8250: New Port Type PORT_AMD_8250 Documentation/kernel-parameters.txt | 7 ++ drivers/acpi/Makefile | 1 + drivers/acpi/acpi_amba.c | 180 ++++++++++++++++++++++++++++++++++++ drivers/acpi/acpi_apd.c | 89 +++++++++++++++--- drivers/dma/pl330.c | 61 ++++++++++-- drivers/iommu/amd_iommu.c | 165 +++++++++++++++++++++++++++++---- drivers/iommu/amd_iommu_init.c | 123 +++++++++++++++++++++++- drivers/iommu/amd_iommu_types.h | 11 +++ drivers/tty/serial/8250/8250_dw.c | 16 ++++ drivers/tty/serial/8250/8250_port.c | 9 ++ drivers/tty/serial/8250/Kconfig | 8 ++ include/linux/acpi.h | 30 ++++++ include/linux/amba/pl330.h | 4 + include/linux/serial_8250.h | 4 + include/uapi/linux/serial_core.h | 3 +- include/uapi/linux/serial_reg.h | 2 + 16 files changed, 673 insertions(+), 40 deletions(-) create mode 100644 drivers/acpi/acpi_amba.c -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
