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    Subject[PATCH v2 0/8] VMCI: dma dg: Add support for DMA datagrams
    Date
    A new version of the VMCI device will introduce two new major changes:
    - support MMIO access to device registers
    - support send/receive of datagrams using DMA transfers instead of
    ioread8_rep/iowrite8_rep operations
    This patch series updates the VMCI driver to support these new
    features while maintaining backwards compatibility.

    The DMA based datagram operations use a send and a receive buffer
    allocated at module load time. The buffer contains a header
    describing the layout of the buffer followed by either an SG list or
    inline data. The header also contains a flag indicating whether the
    buffer is currently owned by the driver or the device. Both for send
    and receive, the driver will initialize the buffer, transfer ownership
    to the device by writing the buffer address to a register, and then
    wait for the ownership to be transferred back. The device will
    generate an interrupt when this happens.

    v2 (fixes issues flagged by kernel test robot <lkp@intel.com>):
    - changed type of mmio_base to void __iomem *
    - made vmci_read_reg, vmci_write_reg and vmci_write_data static functions

    Jorgen Hansen (8):
    VMCI: dma dg: whitespace formatting change for vmci register defines
    VMCI: dma dg: add MMIO access to registers
    VMCI: dma dg: detect DMA datagram capability
    VMCI: dma dg: set OS page size
    VMCI: dma dg: register dummy IRQ handlers for DMA datagrams
    VMCI: dma dg: allocate send and receive buffers for DMA datagrams
    VMCI: dma dg: add support for DMA datagrams sends
    VMCI: dma dg: add support for DMA datagrams receive

    drivers/misc/vmw_vmci/vmci_guest.c | 340 ++++++++++++++++++++++++-----
    include/linux/vmw_vmci_defs.h | 84 ++++++-
    2 files changed, 361 insertions(+), 63 deletions(-)

    --
    2.25.1

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