The following six patch series adds support to read vendor statistics
for a vdpa device.

The first patch is just a cleanup fix.
The second patch lays the ground to allow an upstream driver to provide
statistics in the form of an attribute name/attribute value pairs.

The third and fourth patches make changes to locking scheme to use
readers/writers semaphore instead if mutex.

The fifth patch implements this for mlx5_vdpa which gives received
descriptors and completed descriptors information for all the
virtqueues.

The sixth patch changes reslock mutex to readers/writers semaphore to
achieve the same goal as done in vdpa core.

v7 -> v8:
Convert cf_mutex to a rw_semaphore

Eli Cohen (6):
  vdpa: Fix error logic in vdpa_nl_cmd_dev_get_doit
  vdpa: Add support for querying vendor statistics
  net/vdpa: Use readers/writers semaphore instead of vdpa_dev_mutex
  net/vdpa: Use readers/writers semaphore instead of cf_mutex
  vdpa/mlx5: Add support for reading descriptor statistics
  vdpa/mlx5: Use readers/writers semaphore instead of mutex

 drivers/vdpa/mlx5/core/mlx5_vdpa.h |   2 +
 drivers/vdpa/mlx5/net/mlx5_vnet.c  | 186 ++++++++++++++++++---
 drivers/vdpa/vdpa.c                | 252 ++++++++++++++++++++++++-----
 include/linux/mlx5/mlx5_ifc.h      |   1 +
 include/linux/mlx5/mlx5_ifc_vdpa.h |  39 +++++
 include/linux/vdpa.h               |  15 +-
 include/uapi/linux/vdpa.h          |   6 +
 7 files changed, 432 insertions(+), 69 deletions(-)

-- 
2.35.1