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authorJesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>2018-07-03 15:42:59 -0700
committerDavid S. Miller <davem@davemloft.net>2018-07-04 22:30:28 +0900
commit3048cf84d152344f874e993558770bba73a65c8f (patch)
tree0868b2697eef23b320c513bb5daccece9ccf477f /net/sched/sch_etf.c
parentigb: Only call skb_tx_timestamp after descriptors are ready (diff)
downloadlinux-dev-3048cf84d152344f874e993558770bba73a65c8f.tar.xz
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igb: Add support for ETF offload
Implement HW offload support for SO_TXTIME through igb's Launchtime feature. This is done by extending igb_setup_tc() so it supports TC_SETUP_QDISC_ETF and configuring i210 so time based transmit arbitration is enabled. The FQTSS transmission mode added before is extended so strict priority (SP) queues wait for stream reservation (SR) ones. igb_config_tx_modes() is extended so it can support enabling/disabling Launchtime following the previous approach used for the credit-based shaper (CBS). As the previous flow, FQTSS transmission mode is enabled automatically by the driver once Launchtime (or CBS, as before) is enabled. Similarly, it's automatically disabled when the feature is disabled for the last queue that had it setup on. The driver just consumes the transmit times from the skbuffs directly, so no special handling is done in case an 'invalid' time is provided. We assume this has been handled by the ETF qdisc already. Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_etf.c')
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