On 2021/9/25 7:14, Michal Kubecek wrote:
On Fri, Sep 24, 2021 at 10:29:56PM +0800, Guangbin Huang wrote:
From: Hao Chen <chenhao288@xxxxxxxxxxxxx>
Add support to set rx buf len via ethtool -G parameter and get
rx buf len via ethtool -g parameter.
Signed-off-by: Hao Chen <chenhao288@xxxxxxxxxxxxx>
Signed-off-by: Guangbin Huang <huangguangbin2@xxxxxxxxxx>
---
Documentation/networking/ethtool-netlink.rst | 2 ++
include/linux/ethtool.h | 18 ++++++++++++++++--
include/uapi/linux/ethtool.h | 8 ++++++++
include/uapi/linux/ethtool_netlink.h | 1 +
net/ethtool/netlink.h | 2 +-
net/ethtool/rings.c | 17 ++++++++++++++++-
6 files changed, 44 insertions(+), 4 deletions(-)
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index a47b0255aaf9..9734b7c1e05d 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -841,6 +841,7 @@ Kernel response contents:
``ETHTOOL_A_RINGS_RX_MINI`` u32 size of RX mini ring
``ETHTOOL_A_RINGS_RX_JUMBO`` u32 size of RX jumbo ring
``ETHTOOL_A_RINGS_TX`` u32 size of TX ring
+ ``ETHTOOL_A_RINGS_RX_BUF_LEN`` u32 size of buffers on the ring
==================================== ====== ==========================
@@ -857,6 +858,7 @@ Request contents:
``ETHTOOL_A_RINGS_RX_MINI`` u32 size of RX mini ring
``ETHTOOL_A_RINGS_RX_JUMBO`` u32 size of RX jumbo ring
``ETHTOOL_A_RINGS_TX`` u32 size of TX ring
+ ``ETHTOOL_A_RINGS_RX_BUF_LEN`` u32 size of buffers on the ring
==================================== ====== ==========================
Kernel checks that requested ring sizes do not exceed limits reported by
Would it make sense to let driver report also maximum supported value
like it does for existing ring parameters (ring sizes)?
Michal
We think it have no sense to report maximum supported value.
Rx buf len of hns3 driver only supports 2048 and 4096 at present, they are
discrete value and checked by driver.
