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ice: Add reg_idx variable in ice_q_vector structure

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Every time we want to re-enable interrupts and/or write to a register
that requires an interrupt vector's hardware index we do the following:

vsi->hw_base_vector + q_vector->v_idx

This is a wasteful operation, especially in the hot path. Fix this by
adding a u16 reg_idx member to the ice_q_vector structure and make the
necessary changes to make this work.

Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Brett Creeley
2019-02-28 15:25:59 -08:00
committed by Jeff Kirsher
parent 8d7189d266
commit b07833a00d
4 changed files with 76 additions and 26 deletions
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3
drivers/net/ethernet/intel/ice/ice.h
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@@ -297,6 +297,7 @@ struct ice_q_vector {
struct ice_vsi *vsi;
u16 v_idx; /* index in the vsi->q_vector array. */
u16 reg_idx;
u8 num_ring_rx; /* total number of Rx rings in vector */
u8 num_ring_tx; /* total number of Tx rings in vector */
u8 itr_countdown; /* when 0 should adjust adaptive ITR */
@@ -403,7 +404,7 @@ static inline void
ice_irq_dynamic_ena(struct ice_hw *hw, struct ice_vsi *vsi,
struct ice_q_vector *q_vector)
{
u32 vector = (vsi && q_vector) ? vsi->hw_base_vector + q_vector->v_idx :
u32 vector = (vsi && q_vector) ? q_vector->reg_idx :
((struct ice_pf *)hw->back)->hw_oicr_idx;
int itr = ICE_ITR_NONE;
u32 val;