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ethtool: Add support for configuring PFC stall prevention in ethtool

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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>
This commit is contained in:
Inbar Karmy
2017-11-20 16:14:30 +02:00
committed by Saeed Mahameed
parent 2fcb12df7d
commit e1577c1c88
2 changed files with 10 additions and 0 deletions
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4
include/uapi/linux/ethtool.h
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@@ -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