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Date: Mon, 16 Jun 2014 08:58:09 -0700 From: Sudeep Dutt <sudeep.dutt@...el.com> To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Dan Williams <dan.j.williams@...el.com> Cc: Siva Yerramreddy <yshivakrishna@...il.com>, Ashutosh Dixit <ashutosh.dixit@...el.com>, Nikhil Rao <nikhil.rao@...el.com>, linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org, Sudeep Dutt <sudeep.dutt@...el.com> Subject: Re: [PATCH char-misc-next v2 0/8] Enable dma driver for MIC X100 Coprocessors On Thu, 2014-05-29 at 14:23 -0700, Sudeep Dutt wrote: > ChangeLog: > ========= > v1 => v2: > a) MIC bus driver cleanups and device release callback fix in patch 2, > as per feedback from Greg Kroah-Hartman. > > v1: Initial post @ https://lkml.org/lkml/2014/5/27/819 > Hi Greg/Dan, We have addressed the feedback received so far. Please take a look at this patch series. Thanks, Sudeep Dutt > These patches are being sent 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 > nd 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: Use dma to transfer data between MIC and host. > Authors: Siva Yerramreddy, Ashutosh Dixit > Patch 6: Add threaded irq support in mic_request_card_irq. > This is needed as the dma driver uses threaded irq. > Author: Siva Yerramreddy > Patch 7: Add dma device on mic bus. > Author: Siva Yerramreddy > Patch 8: Modify the mpss script to load/unload mic_x100_dma.ko. > Author: Siva Yerramreddy > > The patches have been compiled/validated against v3.15-rc3. Tested using > dmatest module with module parameter "threads_per_chan=60". These patches > have also been scanned by Fengguang Wu's 0-day infrastructure and no > issues have been reported. > > Thanks to Dan Williams, Vinod Koul, Jon Mason, Dave Jiang for the initial > review. > > Siva Yerramreddy (7): > misc: mic: Add mic bus and dma driver documentation > 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 > > Sudeep Dutt (1): > misc: mic: add a bus driver for virtual MIC devices > > 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 | 219 +++++++++++ > drivers/misc/mic/card/mic_device.c | 23 +- > drivers/misc/mic/card/mic_device.h | 9 +- > drivers/misc/mic/card/mic_virtio.c | 7 +- > drivers/misc/mic/card/mic_x100.c | 55 ++- > drivers/misc/mic/host/mic_boot.c | 83 +++- > drivers/misc/mic/host/mic_device.h | 24 ++ > drivers/misc/mic/host/mic_intr.c | 121 +++--- > drivers/misc/mic/host/mic_intr.h | 27 +- > drivers/misc/mic/host/mic_main.c | 5 +- > drivers/misc/mic/host/mic_virtio.c | 187 +++++++-- > drivers/misc/mic/host/mic_virtio.h | 21 +- > drivers/misc/mic/host/mic_x100.c | 8 + > include/linux/mic_bus.h | 112 ++++++ > 23 files changed, 1938 insertions(+), 151 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 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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