[V4,0/6] ifcvf/vDPA: support query device config space through netlink

Message

Zhu, Lingshan July 22, 2022, 11:53 a.m. UTC

This series allows userspace to query device config space of vDPA
devices and the management devices through netlink,
to get multi-queue, feature bits and etc.

This series has introduced a new netlink attr
VDPA_ATTR_VDPA_DEV_SUPPORTED_FEATURES, this should be used to query
features of vDPA  devices than the management device.

Please help review.

Thanks!
Zhu Lingshan

Changes from V3:
(1)drop the fixes tags(Parva)
(2)better commit log for patch 1/6(Michael)
(3)assign num_queues to max_supported_vqs than max_vq_pairs(Jason)
(4)initialize virtio pci capabilities in the probe() function.

Changes from V2:
Add fixes tags(Parva)

Changes from V1:
(1) Use __virito16_to_cpu(true, xxx) for the le16 casting(Jason)
(2) Add a comment in ifcvf_get_config_size(), to explain
why we should return the minimum value of
sizeof(struct virtio_net_config) and the onboard
cap size(Jason)
(3) Introduced a new attr VDPA_ATTR_VDPA_DEV_SUPPORTED_FEATURES
(4) Show the changes of iproute2 output before and after 5/6 patch(Jason)
(5) Fix cast warning in vdpa_fill_stats_rec() 

Zhu Lingshan (6):
  vDPA/ifcvf: get_config_size should return a value no greater than dev
    implementation
  vDPA/ifcvf: support userspace to query features and MQ of a management
    device
  vDPA: allow userspace to query features of a vDPA device
  vDPA: !FEATURES_OK should not block querying device config space
  vDPA: answer num of queue pairs = 1 to userspace when VIRTIO_NET_F_MQ
    == 0
  vDPA: fix 'cast to restricted le16' warnings in vdpa.c

 drivers/vdpa/ifcvf/ifcvf_base.c |  13 ++-
 drivers/vdpa/ifcvf/ifcvf_base.h |   2 +
 drivers/vdpa/ifcvf/ifcvf_main.c | 142 +++++++++++++++++---------------
 drivers/vdpa/vdpa.c             |  32 ++++---
 include/uapi/linux/vdpa.h       |   1 +
 5 files changed, 105 insertions(+), 85 deletions(-)