On 2019/9/25 下午4:24, Tian, Kevin wrote: >> From: Jason Wang [mailto:jasowang@xxxxxxxxxx] >> Sent: Tuesday, September 24, 2019 9:53 PM >> >> Hi all: >> >> There are hardware that can do virtio datapath offloading while having >> its own control path. This path tries to implement a mdev based >> unified API to support using kernel virtio driver to drive those >> devices. This is done by introducing a new mdev transport for virtio >> (virtio_mdev) and register itself as a new kind of mdev driver. Then >> it provides a unified way for kernel virtio driver to talk with mdev >> device implementation. >> >> Though the series only contains kernel driver support, the goal is to >> make the transport generic enough to support userspace drivers. This >> means vhost-mdev[1] could be built on top as well by resuing the >> transport. >> >> A sample driver is also implemented which simulate a virito-net >> loopback ethernet device on top of vringh + workqueue. This could be >> used as a reference implementation for real hardware driver. >> >> Consider mdev framework only support VFIO device and driver right now, >> this series also extend it to support other types. This is done >> through introducing class id to the device and pairing it with >> id_talbe claimed by the driver. On top, this seris also decouple > id_table claimed ... this series ... Let me fix in V3. Thanks > >> device specific parents ops out of the common ones. >> >> Pktgen test was done with virito-net + mvnet loop back device. >> >> Please review. >> >> [1] https://lkml.org/lkml/2019/9/16/869 >> >> Changes from V1: >> >> - move virtio_mdev.c to drivers/virtio >> - store class_id in mdev_device instead of mdev_parent >> - store device_ops in mdev_device instead of mdev_parent >> - reorder the patch, vringh fix comes first >> - really silent compiling warnings >> - really switch to use u16 for class_id >> - uevent and modpost support for mdev class_id >> - vraious tweaks per comments from Parav >> >> Changes from RFC-V2: >> >> - silent compile warnings on some specific configuration >> - use u16 instead u8 for class id >> - reseve MDEV_ID_VHOST for future vhost-mdev work >> - introduce "virtio" type for mvnet and make "vhost" type for future >> work >> - add entries in MAINTAINER >> - tweak and typos fixes in commit log >> >> Changes from RFC-V1: >> >> - rename device id to class id >> - add docs for class id and device specific ops (device_ops) >> - split device_ops into seperate headers >> - drop the mdev_set_dma_ops() >> - use device_ops to implement the transport API, then it's not a part >> of UAPI any more >> - use GFP_ATOMIC in mvnet sample device and other tweaks >> - set_vring_base/get_vring_base support for mvnet device >> >> Jason Wang (8): >> vringh: fix copy direction of vringh_iov_push_kern() >> mdev: class id support >> mdev: bus uevent support >> modpost: add support for mdev class id >> mdev: introduce device specific ops >> mdev: introduce virtio device and its device ops >> virtio: introduce a mdev based transport >> docs: sample driver to demonstrate how to implement virtio-mdev >> framework >> >> .../driver-api/vfio-mediated-device.rst | 7 +- >> MAINTAINERS | 2 + >> drivers/gpu/drm/i915/gvt/kvmgt.c | 18 +- >> drivers/s390/cio/vfio_ccw_ops.c | 18 +- >> drivers/s390/crypto/vfio_ap_ops.c | 14 +- >> drivers/vfio/mdev/mdev_core.c | 19 + >> drivers/vfio/mdev/mdev_driver.c | 22 + >> drivers/vfio/mdev/mdev_private.h | 2 + >> drivers/vfio/mdev/vfio_mdev.c | 45 +- >> drivers/vhost/vringh.c | 8 +- >> drivers/virtio/Kconfig | 7 + >> drivers/virtio/Makefile | 1 + >> drivers/virtio/virtio_mdev.c | 417 +++++++++++ >> include/linux/mdev.h | 52 +- >> include/linux/mod_devicetable.h | 8 + >> include/linux/vfio_mdev.h | 52 ++ >> include/linux/virtio_mdev.h | 145 ++++ >> samples/Kconfig | 7 + >> samples/vfio-mdev/Makefile | 1 + >> samples/vfio-mdev/mbochs.c | 20 +- >> samples/vfio-mdev/mdpy.c | 20 +- >> samples/vfio-mdev/mtty.c | 18 +- >> samples/vfio-mdev/mvnet.c | 692 ++++++++++++++++++ >> scripts/mod/devicetable-offsets.c | 3 + >> scripts/mod/file2alias.c | 10 + >> 25 files changed, 1524 insertions(+), 84 deletions(-) >> create mode 100644 drivers/virtio/virtio_mdev.c >> create mode 100644 include/linux/vfio_mdev.h >> create mode 100644 include/linux/virtio_mdev.h >> create mode 100644 samples/vfio-mdev/mvnet.c >> >> -- >> 2.19.1
