This series improves ethtool support for Wangxun VF drivers
(ngbevf and txgbevf) in libwx.

This series extends VF support by enabling:
ring parameter configuration via ethtool -G
interrupt coalescing configuration via ethtool -C
per-queue statistics reporting via ethtool -S

Patch 1 adds support for set_ringparam in wx_ethtool_ops_vf,
allowing VF users to adjust TX/RX descriptor ring sizes.
Patch 2 enables set_coalesce support for VF devices and updates
EITR programming to use the VF-specific register access helper.
Patch 3 adds VF statistics support so ethtool -S can
report useful runtime counters for VF interfaces.

Changelog:
v6:
- Patch 1:
  Clarify comments describing wx_set_ring() failure semantics.
- Patch 2:
  Expand commit message to explain VF ITR encoding changes.
- Patch 3:
  Protect ring accesses in wx_update_stats().
v5: https://lore.kernel.org/all/20260615104849.60444-1-mengyuanlou@net-swift.com (local)
- Patch 3:
  Convert WX_NUM_{RX,TX}_QUEUES macros to take explicit netdev parameter
  as suggested by Simon Horman.
v4: https://lore.kernel.org/all/20260608103946.25786-1-mengyuanlou@net-swift.com (local)
  sashiko: https://netdev-ai.bots.linux.dev/sashiko/#/patchset/20260529075147.88398-1-mengyuanlou%40net-swift.com
- Patch 2:
  PF and VF share the same ITR value range. Update wx_write_eitr_vf() to apply
  identical range clamping as the PF path, ensuring consistent coalesce behavior
  across both device types.
- Patch 3:
  Remove wx_update_stats in wxvf_down.
  Replace both WX_GLOBAL_STATS_LEN and WX_STATS_LEN macros with type-safe
  static helpers wx_global_stats_len() and wx_stats_len().
v3: https://lore.kernel.org/all/20260529075147.88398-1-mengyuanlou@net-swift.com (local)
- Patch 3:
  Drop netdev_stat_ops support from this patch.
v2: https://lore.kernel.org/all/20260525101115.13151-1-mengyuanlou@net-swift.com (local)
- Patch 3:
  Remove some stats which can be replaced by standard stats defined in
  include/net/netdev_queues.h.
- Patch 1:
  Adding a return value to wx_set_ring to make wx_set_ringparam_vf can
  be passed back to userspace.
  Remove freeing and requesting of IRQs. Ring resize only updates descriptor
  resources and does not change MSI-X vector or interrupt configuration,
  so IRQs do not need to be reallocated.
v1: https://lore.kernel.org/all/20260514103405.42175-1-mengyuanlou@net-swift.com (local)



Mengyuan Lou (3):
  net: libwx: add support for set_ringparam in wx_ethtool_ops_vf
  net: libwx: add support for set_coalesce in wx_ethtool_ops_vf
  net: libwx: support vf per-queue statistics via ethtool -S

 .../net/ethernet/wangxun/libwx/wx_ethtool.c   | 139 +++++++++++++++---
 drivers/net/ethernet/wangxun/libwx/wx_hw.c    |   8 +
 drivers/net/ethernet/wangxun/libwx/wx_lib.c   |   9 +-
 drivers/net/ethernet/wangxun/libwx/wx_lib.h   |   4 +-
 drivers/net/ethernet/wangxun/libwx/wx_vf.h    |   1 -
 .../net/ethernet/wangxun/libwx/wx_vf_common.c |   6 +-
 .../net/ethernet/wangxun/libwx/wx_vf_common.h |   2 +
 .../net/ethernet/wangxun/libwx/wx_vf_lib.c    |  13 +-
 8 files changed, 150 insertions(+), 32 deletions(-)

-- 
2.30.1