Re: [PATCH 0/8] xen: dma-buf support for grant device

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On 05/25/2018 11:33 AM, Oleksandr Andrushchenko wrote:


Oleksandr Andrushchenko (8):
   xen/grant-table: Make set/clear page private code shared
   xen/balloon: Move common memory reservation routines to a module
   xen/grant-table: Allow allocating buffers suitable for DMA
   xen/gntdev: Allow mappings for DMA buffers
   xen/gntdev: Add initial support for dma-buf UAPI
   xen/gntdev: Implement dma-buf export functionality
   xen/gntdev: Implement dma-buf import functionality
   xen/gntdev: Expose gntdev's dma-buf API for in-kernel use

  drivers/xen/Kconfig           |   23 +
  drivers/xen/Makefile          |    1 +
  drivers/xen/balloon.c         |   71 +--
  drivers/xen/gntdev.c          | 1025 ++++++++++++++++++++++++++++++++-


I think this calls for gntdev_dma.c. I only had a quick look over gntdev changes but they very much are concentrated in dma-specific routines.

You essentially only share file_operations entry points with original gntdev code, right?

-boris


  drivers/xen/grant-table.c     |  176 +++++-
  drivers/xen/mem-reservation.c |  134 +++++
  include/uapi/xen/gntdev.h     |  106 ++++
  include/xen/grant_dev.h       |   37 ++
  include/xen/grant_table.h     |   28 +
  include/xen/mem_reservation.h |   29 +
  10 files changed, 1527 insertions(+), 103 deletions(-)
  create mode 100644 drivers/xen/mem-reservation.c
  create mode 100644 include/xen/grant_dev.h
  create mode 100644 include/xen/mem_reservation.h




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