From 9e4ab4c29a62d2ccbf4be42707669be2f42d391c Mon Sep 17 00:00:00 2001 From: Brett Creeley Date: Wed, 19 Sep 2018 17:23:19 -0700 Subject: ice: Add support for dynamic interrupt moderation Currently there is no support for dynamic interrupt moderation. This patch adds some initial code to support this. The following changes were made: 1. Currently we are using multiple members to store the interrupt granularity (itr_gran_25/50/100/200). This is not necessary because we can query the device to determine what the interrupt granularity should be set to, done by a new function ice_get_itr_intrl_gran. 2. Added intrl to ice_q_vector structure to support interrupt rate limiting. 3. Added the function ice_intrl_usecs_to_reg for converting to a value in usecs that the device understands. 4. Added call to write to the GLINT_RATE register. Disable intrl by default for now. 5. Changed rx/tx_itr_setting to itr_setting because having both seems redundant because a ring is either Tx or Rx. 6. Initialize itr_setting for both Tx/Rx rings in ice_vsi_alloc_rings() Signed-off-by: Brett Creeley Signed-off-by: Anirudh Venkataramanan Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/ice/ice.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/net/ethernet/intel/ice/ice.h') diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h index fc6bc1233f10..0b269c470343 100644 --- a/drivers/net/ethernet/intel/ice/ice.h +++ b/drivers/net/ethernet/intel/ice/ice.h @@ -230,6 +230,10 @@ struct ice_q_vector { u8 num_ring_tx; /* total number of tx rings in vector */ u8 num_ring_rx; /* total number of rx rings in vector */ char name[ICE_INT_NAME_STR_LEN]; + /* in usecs, need to use ice_intrl_to_usecs_reg() before writing this + * value to the device + */ + u8 intrl; } ____cacheline_internodealigned_in_smp; enum ice_pf_flags { -- cgit