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| author | Inbar Karmy <inbark@mellanox.com> | 2017-11-20 16:14:30 +0200 |
|---|---|---|
| committer | Saeed Mahameed <saeedm@mellanox.com> | 2018-03-26 13:46:46 -0700 |
| commit | e1577c1c881b09e9f15a743a4a1907815b74d0f7 (patch) | |
| tree | 611ccfe349918ef69ea4603ffc48eeb1c9aee1ee | |
| parent | 2fcb12df7d2fa5a004fc3e7f589e58a08f7ed8c9 (diff) | |
| download | linux-0-day-e1577c1c881b09e9f15a743a4a1907815b74d0f7.tar.gz linux-0-day-e1577c1c881b09e9f15a743a4a1907815b74d0f7.tar.xz | |
ethtool: Add support for configuring PFC stall prevention in ethtool
In the event where the device unexpectedly becomes unresponsive
for a long period of time, flow control mechanism may propagate
pause frames which will cause congestion spreading to the entire
network.
To prevent this scenario, when the device is stalled for a period
longer than a pre-configured timeout, flow control mechanisms are
automatically disabled.
This patch adds support for the ETHTOOL_PFC_STALL_PREVENTION
as a tunable.
This API provides support for configuring flow control storm prevention
timeout (msec).
Signed-off-by: Inbar Karmy <inbark@mellanox.com>
Cc: Michal Kubecek <mkubecek@suse.cz>
Cc: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
| -rw-r--r-- | include/uapi/linux/ethtool.h | 4 | ||||
| -rw-r--r-- | net/core/ethtool.c | 6 |
2 files changed, 10 insertions, 0 deletions
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h index 20da156aaf64e..4ca65b56084f9 100644 --- a/include/uapi/linux/ethtool.h +++ b/include/uapi/linux/ethtool.h @@ -217,10 +217,14 @@ struct ethtool_value { __u32 data; }; +#define PFC_STORM_PREVENTION_AUTO 0xffff +#define PFC_STORM_PREVENTION_DISABLE 0 + enum tunable_id { ETHTOOL_ID_UNSPEC, ETHTOOL_RX_COPYBREAK, ETHTOOL_TX_COPYBREAK, + ETHTOOL_PFC_PREVENTION_TOUT, /* timeout in msecs */ /* * Add your fresh new tubale attribute above and remember to update * tunable_strings[] in net/core/ethtool.c diff --git a/net/core/ethtool.c b/net/core/ethtool.c index 157cd9efa4bed..bb6e498c6e3d5 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -121,6 +121,7 @@ tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = { [ETHTOOL_ID_UNSPEC] = "Unspec", [ETHTOOL_RX_COPYBREAK] = "rx-copybreak", [ETHTOOL_TX_COPYBREAK] = "tx-copybreak", + [ETHTOOL_PFC_PREVENTION_TOUT] = "pfc-prevention-tout", }; static const char @@ -2311,6 +2312,11 @@ static int ethtool_tunable_valid(const struct ethtool_tunable *tuna) tuna->type_id != ETHTOOL_TUNABLE_U32) return -EINVAL; break; + case ETHTOOL_PFC_PREVENTION_TOUT: + if (tuna->len != sizeof(u16) || + tuna->type_id != ETHTOOL_TUNABLE_U16) + return -EINVAL; + break; default: return -EINVAL; } |