This series is against v5.4-rc2 Changes since v1: - "avalon-dma" converted to "dmaengine" model; - "avalon-drv" renamed to "avalon-test"; The Avalon-MM DMA Interface for PCIe is a design used in hard IPs for Intel Arria, Cyclone or Stratix FPGAs. It transfers data between on-chip memory and system memory. Patch 1. This patch introduces "avalon-dma" driver that conforms to "dmaengine" model. Patch 2. The existing "dmatest" is not meant for DMA_SLAVE type of transfers needed by "avalon-dma". Instead, custom "avalon-test" driver was used to debug and stress "avalon-dma". If it could be useful for a wider audience, I can make it optional part of "avalon-dma" sources or leave it as separate driver. Marking patch 2 as RFC for now. Testing was done using a custom FPGA build with Arria 10 FPGA streaming data to target device RAM: +----------+ +----------+ +----------+ +----------+ | Nios CPU |<-->| RAM |<-->| Avalon |<-PCIe->| Host CPU | +----------+ +----------+ +----------+ +----------+ The RAM was examined for data integrity by examining RAM contents from host CPU (indirectly - checking data DMAed to the system) and from Nios CPU that has direct access to the device RAM. A companion tool using "avalon-test" driver was used to DMA files to the device: https://github.com/a-gordeev/avalon-tool.git CC: Michael Chen <micchen@xxxxxxxxxx> CC: devel@xxxxxxxxxxxxxxxxxxxx CC: dmaengine@xxxxxxxxxxxxxxx Alexander Gordeev (2): dmaengine: avalon: Intel Avalon-MM DMA Interface for PCIe dmaengine: avalon: Intel Avalon-MM DMA Interface for PCIe test drivers/dma/Kconfig | 3 + drivers/dma/Makefile | 2 + drivers/dma/avalon-test/Kconfig | 23 + drivers/dma/avalon-test/Makefile | 14 + drivers/dma/avalon-test/avalon-dev.c | 65 +++ drivers/dma/avalon-test/avalon-dev.h | 33 ++ drivers/dma/avalon-test/avalon-ioctl.c | 128 +++++ drivers/dma/avalon-test/avalon-ioctl.h | 12 + drivers/dma/avalon-test/avalon-mmap.c | 93 ++++ drivers/dma/avalon-test/avalon-mmap.h | 12 + drivers/dma/avalon-test/avalon-sg-buf.c | 132 +++++ drivers/dma/avalon-test/avalon-sg-buf.h | 26 + drivers/dma/avalon-test/avalon-util.c | 54 ++ drivers/dma/avalon-test/avalon-util.h | 12 + drivers/dma/avalon-test/avalon-xfer.c | 697 ++++++++++++++++++++++++ drivers/dma/avalon-test/avalon-xfer.h | 28 + drivers/dma/avalon/Kconfig | 88 +++ drivers/dma/avalon/Makefile | 6 + drivers/dma/avalon/avalon-core.c | 432 +++++++++++++++ drivers/dma/avalon/avalon-core.h | 90 +++ drivers/dma/avalon/avalon-hw.c | 212 +++++++ drivers/dma/avalon/avalon-hw.h | 86 +++ drivers/dma/avalon/avalon-pci.c | 150 +++++ include/uapi/linux/avalon-ioctl.h | 32 ++ 24 files changed, 2430 insertions(+) create mode 100644 drivers/dma/avalon-test/Kconfig create mode 100644 drivers/dma/avalon-test/Makefile create mode 100644 drivers/dma/avalon-test/avalon-dev.c create mode 100644 drivers/dma/avalon-test/avalon-dev.h create mode 100644 drivers/dma/avalon-test/avalon-ioctl.c create mode 100644 drivers/dma/avalon-test/avalon-ioctl.h create mode 100644 drivers/dma/avalon-test/avalon-mmap.c create mode 100644 drivers/dma/avalon-test/avalon-mmap.h create mode 100644 drivers/dma/avalon-test/avalon-sg-buf.c create mode 100644 drivers/dma/avalon-test/avalon-sg-buf.h create mode 100644 drivers/dma/avalon-test/avalon-util.c create mode 100644 drivers/dma/avalon-test/avalon-util.h create mode 100644 drivers/dma/avalon-test/avalon-xfer.c create mode 100644 drivers/dma/avalon-test/avalon-xfer.h create mode 100644 drivers/dma/avalon/Kconfig create mode 100644 drivers/dma/avalon/Makefile create mode 100644 drivers/dma/avalon/avalon-core.c create mode 100644 drivers/dma/avalon/avalon-core.h create mode 100644 drivers/dma/avalon/avalon-hw.c create mode 100644 drivers/dma/avalon/avalon-hw.h create mode 100644 drivers/dma/avalon/avalon-pci.c create mode 100644 include/uapi/linux/avalon-ioctl.h -- 2.23.0
