Prior series have transformed other parts of VFIO from working on struct device or struct vfio_group into working directly on struct vfio_device. Based on that work we now have vfio_device's readily available in all the drivers.
Update the rest of the driver facing API to use vfio_device as an input.
The following are switched from struct device to struct vfio_device: vfio_register_notifier() vfio_unregister_notifier() vfio_pin_pages() vfio_unpin_pages() vfio_dma_rw()
The following group APIs are obsoleted and removed by just using struct vfio_device with the above: vfio_group_pin_pages() vfio_group_unpin_pages() vfio_group_iommu_domain() vfio_group_get_external_user_from_dev()
To retain the performance of the new device APIs relative to their group versions optimize how vfio_group_add_container_user() is used to avoid calling it when the driver must already guarantee the device is open and the container_users incrd.
The remaining exported VFIO group interfaces are only used by kvm, and are addressed by a parallel series.
This series is based on Christoph's gvt rework here:
https://lore.kernel.org/all/5a8b9f48-2c32-8177-1c18-e3bd7bfde558@intel.com/
and so will need the PR merged first.
I have a followup series that needs this.
This is also part of the iommufd work - moving the driver facing interface to vfio_device provides a much cleaner path to integrate with iommufd.
v4: - Use 'device' as the argument name for a struct vfio_device in vfio.c v3: https://lore.kernel.org/r/0-v3-e131a9b6b467+14b6-vfio_mdev_no_group_jgg@nvid... - Based on VFIO's gvt/iommu merge - Remove mention of mdev_legacy_get_vfio_device() from commit message - Clarify commit message for vfio_dma_rw() conversion - Talk about the open_count change in the commit message - No code change v2: https://lore.kernel.org/r/0-v2-6011bde8e0a1+5f-vfio_mdev_no_group_jgg@nvidia... - Based on Christoph's series so mdev_legacy_get_vfio_device() is removed - Reflow indenting - Use vfio_assert_device_open() and WARN_ON_ONCE instead of open coding the assertion v1: https://lore.kernel.org/r/0-v1-a8faf768d202+125dd-vfio_mdev_no_group_jgg@nvi...
Jason Gunthorpe (7): vfio: Make vfio_(un)register_notifier accept a vfio_device vfio/ccw: Remove mdev from struct channel_program vfio/mdev: Pass in a struct vfio_device * to vfio_pin/unpin_pages() vfio/mdev: Pass in a struct vfio_device * to vfio_dma_rw() drm/i915/gvt: Change from vfio_group_(un)pin_pages to vfio_(un)pin_pages vfio: Remove dead code vfio: Remove calls to vfio_group_add_container_user()
.../driver-api/vfio-mediated-device.rst | 4 +- drivers/gpu/drm/i915/gvt/gvt.h | 5 +- drivers/gpu/drm/i915/gvt/kvmgt.c | 51 ++- drivers/s390/cio/vfio_ccw_cp.c | 47 +-- drivers/s390/cio/vfio_ccw_cp.h | 4 +- drivers/s390/cio/vfio_ccw_fsm.c | 3 +- drivers/s390/cio/vfio_ccw_ops.c | 7 +- drivers/s390/crypto/vfio_ap_ops.c | 23 +- drivers/vfio/vfio.c | 299 +++--------------- include/linux/vfio.h | 21 +- 10 files changed, 109 insertions(+), 355 deletions(-)
base-commit: 676d7cda1a3c19872428a9bc818577a1aafafdd5