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[RFC,v2,00/11] Move group specific code into group.c

Message ID 20221124122702.26507-1-yi.l.liu@intel.com (mailing list archive)
Headers show
Series Move group specific code into group.c | expand

Message

Yi Liu Nov. 24, 2022, 12:26 p.m. UTC 
With the introduction of iommufd[1], VFIO is towarding to provide device
centric uAPI after adapting to iommufd. With this trend, existing VFIO
group infrastructure is optional once VFIO converted to device centric.

This series moves the group specific code out of vfio_main.c, prepares
for compiling group infrastructure out after adding vfio device cdev[2]

Complete code in below branch:

https://github.com/yiliu1765/iommufd/commits/vfio_group_split_rfcv2

This is based on Jason's "Connect VFIO to IOMMUFD"[3] and my "Make mdev driver
dma_unmap callback tolerant to unmaps come before device open"[4]

[1] https://lore.kernel.org/all/0-v5-4001c2997bd0+30c-iommufd_jgg@nvidia.com/
[2] https://github.com/yiliu1765/iommufd/tree/wip/vfio_device_cdev
[3] https://lore.kernel.org/kvm/063990c3-c244-1f7f-4e01-348023832066@intel.com/T/#t
[4] https://lore.kernel.org/kvm/20221123134832.429589-1-yi.l.liu@intel.com/T/#t

v2:
 - Remove device->group reference in vfio_main.c suggested by Jason.
 - Cherry-pick the patches in Alex's vfio/next branch, and rebased this
   series on the top.

v1: https://lore.kernel.org/kvm/20221123150113.670399-1-yi.l.liu@intel.com/T/#t

Regards,
	Yi Liu

Jason Gunthorpe (2):
  vfio: Simplify vfio_create_group()
  vfio: Move the sanity check of the group to vfio_create_group()

Yi Liu (9):
  vfio: Set device->group in helper function
  vfio: Wrap group codes to be helpers for __vfio_register_dev() and
    unregister
  vfio: Make vfio_device_open() group agnostic
  vfio: Move device open/close code to be helpfers
  vfio: Swap order of vfio_device_container_register() and open_device()
  vfio: Refactor vfio_device_first_open() and _last_close()
  vfio: Wrap vfio group module init/clean code into helpers
  vfio: Refactor dma APIs for emulated devices
  vfio: Move vfio group specific code into group.c

 drivers/vfio/Makefile    |   1 +
 drivers/vfio/container.c |  20 +-
 drivers/vfio/group.c     | 842 ++++++++++++++++++++++++++++++++++++
 drivers/vfio/vfio.h      |  49 ++-
 drivers/vfio/vfio_main.c | 896 +++------------------------------------
 5 files changed, 959 insertions(+), 849 deletions(-)
 create mode 100644 drivers/vfio/group.c