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Date: Mon, 30 Jun 2014 08:33:53 -0700 From: Sudeep Dutt <sudeep.dutt@...el.com> To: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Cc: sudeep.dutt@...el.com, Dan Williams <dan.j.williams@...el.com>, 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 Subject: Re: [PATCH char-misc-next v2 0/8] Enable dma driver for MIC X100 Coprocessors On Mon, 2014-06-16 at 08:58 -0700, Sudeep Dutt wrote: > 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. > Another gentle reminder to take a look at this patch series. Greg/Dan, please let us know what we can do to speed things up here. 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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