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bnxt_en: Improve NQ reservations.

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bnxt_need_reserve_rings() determines if any resources have changed and
requires new reservation with firmware.  The NQ checking is currently
just an approximation.  Improve the NQ checking logic to make it
accurate.  NQ reservation is only needed on 57500 PFs.  This fix will
eliminate unnecessary reservations and will reduce NQ reservations
when some NQs have been released on 57500 PFs.

Fixes: c0b8cda05e ("bnxt_en: Fix NQ/CP rings accounting on the new 57500 chips.")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2019-05-05 07:17:05 -04:00 committed by David S. Miller
parent 53579e37d1
commit 01989c6b69
1 changed files with 4 additions and 2 deletions
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6
drivers/net/ethernet/broadcom/bnxt/bnxt.c
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@ -5521,11 +5521,13 @@ static bool bnxt_need_reserve_rings(struct bnxt *bp)
stat = bnxt_get_func_stat_ctxs(bp);
if (BNXT_NEW_RM(bp) &&
(hw_resc->resv_rx_rings != rx || hw_resc->resv_cp_rings != cp ||
hw_resc->resv_irqs < nq || hw_resc->resv_vnics != vnic ||
hw_resc->resv_stat_ctxs != stat ||
hw_resc->resv_vnics != vnic || hw_resc->resv_stat_ctxs != stat ||
(hw_resc->resv_hw_ring_grps != grp &&
!(bp->flags & BNXT_FLAG_CHIP_P5))))
return true;
if ((bp->flags & BNXT_FLAG_CHIP_P5) && BNXT_PF(bp) &&
hw_resc->resv_irqs != nq)
return true;
return false;
}