I am sending all these patches to char-misc because there is a dependency between the patches for dma driver and other drivers. Description: ============ This set of patches add support for MIC X100 dma driver. MIC PCIe card has a dma controller with 8 channels. These channels are shared between the host s/w and the card s/w. 0 to 3 are used by host and 4 to 7 by card. As the dma device doesn't show up as PCIe device, a virtual bus called mic bus is created and virtual dma devices are created on it by the host/card drivers. On host the channels are private and used only by the host driver to transfer data for the virtio devices. Here is a higher level block diagram. | +----------+ | +----------+ | Card OS | | | Host OS | +----------+ | +----------+ | +-------+ +--------+ +------+ | +---------+ +--------+ +--------+ | Virtio| |Virtio | |Virtio| | |Virtio | |Virtio | |Virtio | | Net | |Console | |Block | | |Net | |Console | |Block | | Driver| |Driver | |Driver| | |backend | |backend | |backend | +-------+ +--------+ +------+ | +---------+ +--------+ +--------+ | | | | | | | | | | |User | | | | | | |------|------------|---------|------- +-------------------+ |Kernel +--------------------------+ | | | Virtio over PCIe IOCTLs | | | +--------------------------+ +-----------+ | | | +-----------+ | MIC DMA | | | | | MIC DMA | | Driver | | | | | Driver | +-----------+ | | | +-----------+ | | | | | +---------------+ | | | +----------------+ |MIC virtual Bus| | | | |MIC virtual Bus | +---------------+ | | | +----------------+ | | | | | | +--------------+ | +---------------+ | | |Intel MIC | | |Intel MIC | | +---|Card Driver | | |Host Driver | | +--------------+ | +---------------+-----+ | | | +-------------------------------------------------------------+ | | | PCIe Bus | +-------------------------------------------------------------+ The following series of patches are partitioned as follows: Patch 1: Add mic bus and dma driver documentation. Author: Siva Yerramreddy Patch 2: Add a bus driver for virtual MIC devices. Authors: Siva Yerramreddy, Sudeep Dutt Patch 3: MIC X100 DMA Driver. Author: Siva Yerramreddy Patch 4: Add threaded irq support in host driver. This is needed as the dma driver uses threaded irq. Author: Siva Yerramreddy Patch 5: Add dma support in host driver. Authors: Siva Yerramreddy, Ashutosh Dixit, Sudeep Dutt Patch 6: Add threaded irq support in card driver. This is needed as the dma driver uses threaded irq. Author: Siva Yerramreddy Patch 7: Add dma support in card driver. Author: Siva Yerramreddy Patch 8: Add support for loading/unloading dma driver. Author: Siva Yerramreddy The patches have been compiled/validated against v3.14. Tested using dmatest module with module parameter "threads_per_chan=60". Thanks to Dan Williams, Vinod Koul, Jon Mason, Dave Jiang for the initial review. Siva Yerramreddy (8): misc: mic: Add mic bus and dma driver documentation misc: mic: add a bus driver for virtual MIC devices dma: MIC X100 DMA Driver misc: mic: add threaded irq support in host driver misc: mic: add dma support in host driver misc: mic: add threaded irq support in card driver misc: mic: add dma support in card driver misc: mic: add support for loading/unloading dma driver Documentation/mic/mic_overview.txt | 67 ++-- Documentation/mic/mpssd/mpss | 14 +- drivers/dma/Kconfig | 19 + drivers/dma/Makefile | 1 + drivers/dma/mic_x100_dma.c | 774 +++++++++++++++++++++++++++++++++++++ drivers/dma/mic_x100_dma.h | 286 ++++++++++++++ drivers/misc/mic/Kconfig | 21 +- drivers/misc/mic/Makefile | 1 + drivers/misc/mic/bus/Makefile | 5 + drivers/misc/mic/bus/mic_bus.c | 188 +++++++++ drivers/misc/mic/card/mic_device.c | 21 +- drivers/misc/mic/card/mic_device.h | 8 +- drivers/misc/mic/card/mic_virtio.c | 4 +- drivers/misc/mic/card/mic_x100.c | 52 ++- drivers/misc/mic/host/mic_boot.c | 78 +++- drivers/misc/mic/host/mic_device.h | 24 ++ drivers/misc/mic/host/mic_intr.c | 116 +++--- drivers/misc/mic/host/mic_intr.h | 21 +- drivers/misc/mic/host/mic_main.c | 5 +- drivers/misc/mic/host/mic_virtio.c | 185 +++++++-- drivers/misc/mic/host/mic_virtio.h | 21 +- drivers/misc/mic/host/mic_x100.c | 8 + include/linux/mic_bus.h | 148 +++++++ 23 files changed, 1922 insertions(+), 145 deletions(-) create mode 100644 drivers/dma/mic_x100_dma.c create mode 100644 drivers/dma/mic_x100_dma.h create mode 100644 drivers/misc/mic/bus/Makefile create mode 100644 drivers/misc/mic/bus/mic_bus.c create mode 100644 include/linux/mic_bus.h -- 1.8.2.2 -- 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