linux-kernel - Re: [PATCH v7 0/9] vDPA driver for Alibaba ENI

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Message-ID: <20211101062250.GA29814@L-PF27918B-1352.localdomain>
Date:   Mon, 1 Nov 2021 14:22:50 +0800
From:   Wu Zongyong <wuzongyong@...ux.alibaba.com>
To:     Jason Wang <jasowang@...hat.com>
Cc:     virtualization <virtualization@...ts.linux-foundation.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        mst <mst@...hat.com>, wei.yang1@...ux.alibaba.com
Subject: Re: [PATCH v7 0/9] vDPA driver for Alibaba ENI

On Mon, Nov 01, 2021 at 11:31:15AM +0800, Jason Wang wrote:
> On Fri, Oct 29, 2021 at 5:15 PM Wu Zongyong
> <wuzongyong@...ux.alibaba.com> wrote:
> >
> > This series implements the vDPA driver for Alibaba ENI (Elastic Network
> > Interface) which is built based on virtio-pci 0.9.5 specification.
> 
> It looks to me Michael has applied the patches, if this is the case,
> we probably need to send patches on top.

What do you mean by saying "send patches on top"?
Sorry, I'm a newbie to contribute for kernel, could you please explain
it in detail?

Thanks
> Thanks
> 
> >
> > Changes since V6:
> > - set default min vq size to 1 intead of 0
> > - enable eni vdpa driver only on X86 hosts
> > - fix some typos
> >
> > Changes since V5:
> > - remove unused codes
> >
> > Changes since V4:
> > - check return values of get_vq_num_{max,min} when probing devices
> > - disable the driver on BE host via Kconfig
> > - add missing commit message
> >
> > Changes since V3:
> > - validate VIRTIO_NET_F_MRG_RXBUF when negotiate features
> > - present F_ORDER_PLATFORM in get_features
> > - remove endian check since ENI always use litter endian
> >
> > Changes since V2:
> > - add new attribute VDPA_ATTR_DEV_MIN_VQ_SIZE instead
> >   VDPA_ATTR_DEV_F_VERSION_1 to guide users to choose correct virtqueue
> >   size as suggested by Jason Wang
> > - present ACCESS_PLATFORM in get_features callback as suggested by Jason
> >   Wang
> > - disable this driver on Big Endian host as suggested by Jason Wang
> > - fix a typo
> >
> > Changes since V1:
> > - add new vdpa attribute VDPA_ATTR_DEV_F_VERSION_1 to indicate whether
> >   the vdpa device is legacy
> > - implement dedicated driver for Alibaba ENI instead a legacy virtio-pci
> >   driver as suggested by Jason Wang
> > - some bugs fixed
> >
> > Wu Zongyong (9):
> >   virtio-pci: introduce legacy device module
> >   vdpa: fix typo
> >   vp_vdpa: add vq irq offloading support
> >   vdpa: add new callback get_vq_num_min in vdpa_config_ops
> >   vdpa: min vq num of vdpa device cannot be greater than max vq num
> >   virtio_vdpa: setup correct vq size with callbacks get_vq_num_{max,min}
> >   vdpa: add new attribute VDPA_ATTR_DEV_MIN_VQ_SIZE
> >   eni_vdpa: add vDPA driver for Alibaba ENI
> >   eni_vdpa: alibaba: fix Kconfig typo
> >
> >  drivers/vdpa/Kconfig                   |   8 +
> >  drivers/vdpa/Makefile                  |   1 +
> >  drivers/vdpa/alibaba/Makefile          |   3 +
> >  drivers/vdpa/alibaba/eni_vdpa.c        | 553 +++++++++++++++++++++++++
> >  drivers/vdpa/vdpa.c                    |  13 +
> >  drivers/vdpa/virtio_pci/vp_vdpa.c      |  12 +
> >  drivers/virtio/Kconfig                 |  10 +
> >  drivers/virtio/Makefile                |   1 +
> >  drivers/virtio/virtio_pci_common.c     |  10 +-
> >  drivers/virtio/virtio_pci_common.h     |   9 +-
> >  drivers/virtio/virtio_pci_legacy.c     | 101 ++---
> >  drivers/virtio/virtio_pci_legacy_dev.c | 220 ++++++++++
> >  drivers/virtio/virtio_vdpa.c           |  16 +-
> >  include/linux/vdpa.h                   |   6 +-
> >  include/linux/virtio_pci_legacy.h      |  42 ++
> >  include/uapi/linux/vdpa.h              |   1 +
> >  16 files changed, 917 insertions(+), 89 deletions(-)
> >  create mode 100644 drivers/vdpa/alibaba/Makefile
> >  create mode 100644 drivers/vdpa/alibaba/eni_vdpa.c
> >  create mode 100644 drivers/virtio/virtio_pci_legacy_dev.c
> >  create mode 100644 include/linux/virtio_pci_legacy.h
> >
> > --
> > 2.31.1
> >