diff options
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_lib.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_lib.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c index acff8d3b1c97..fd894e89be3b 100644 --- a/drivers/net/ethernet/intel/ice/ice_lib.c +++ b/drivers/net/ethernet/intel/ice/ice_lib.c @@ -1942,6 +1942,31 @@ void ice_write_itr(struct ice_ring_container *rc, u16 itr) } /** + * ice_set_q_vector_intrl - set up interrupt rate limiting + * @q_vector: the vector to be configured + * + * Interrupt rate limiting is local to the vector, not per-queue so we must + * detect if either ring container has dynamic moderation enabled to decide + * what to set the interrupt rate limit to via INTRL settings. In the case that + * dynamic moderation is disabled on both, write the value with the cached + * setting to make sure INTRL register matches the user visible value. + */ +void ice_set_q_vector_intrl(struct ice_q_vector *q_vector) +{ + if (ITR_IS_DYNAMIC(&q_vector->tx) || ITR_IS_DYNAMIC(&q_vector->rx)) { + /* in the case of dynamic enabled, cap each vector to no more + * than (4 us) 250,000 ints/sec, which allows low latency + * but still less than 500,000 interrupts per second, which + * reduces CPU a bit in the case of the lowest latency + * setting. The 4 here is a value in microseconds. + */ + ice_write_intrl(q_vector, 4); + } else { + ice_write_intrl(q_vector, q_vector->intrl); + } +} + +/** * ice_vsi_cfg_msix - MSIX mode Interrupt Config in the HW * @vsi: the VSI being configured * |