[net-next,0/5] ethtool: add support to set/get tx spare buf size and rx buf len

Message

Guangbin Huang Aug. 25, 2021, 6:40 a.m. UTC

This series add support to set/get tx spare buf size and rx buf len via
ethtool and hns3 driver implements them.

Tx spare buf size is used for tx copybreak feature which for small size
packet or frag. Use ethtool --get-tunable command to get it, and ethtool
--set-tunable command to set it, examples are as follow:

1. set tx spare buf size to 102400:
$ ethtool --set-tunable eth1 tx-buf-size 102400

2. get tx spare buf size:
$ ethtool --get-tunable eth1 tx-buf-size
tx-buf-size: 102400

Rx buf len is buffer length of each rx BD. Use ethtool -g command to get
it, and ethtool -G command to set it, examples are as follow:

1. set rx buf len to 4096
$ ethtool -G eth1 rx-buf-len 4096

2. get rx buf len
$ ethtool -g eth1
...
RX Buf Len:     4096


Hao Chen (5):
  ethtool: add support to set/get tx spare buf size
  net: hns3: add support to set/get tx spare buf via ethtool for hns3
    driver
  ethtool: add support to set/get rx buf len
  net: hns3: add support to set/get rx buf len via ethtool for hns3
    driver
  net: hns3: remove the way to set tx spare buf via module parameter

 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c    | 11 +--
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.h    |  2 +
 drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c | 98 ++++++++++++++++++++--
 include/uapi/linux/ethtool.h                       |  3 +
 include/uapi/linux/ethtool_netlink.h               |  1 +
 net/ethtool/ioctl.c                                |  1 +
 net/ethtool/netlink.h                              |  2 +-
 net/ethtool/rings.c                                | 11 ++-
 8 files changed, 112 insertions(+), 17 deletions(-)