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bnxt_en: Improve resource accounting for SRIOV.

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When VFs are created, the current code subtracts the maximum VF
resources from the PF's pool.  This under-estimates the resources
remaining in the PF pool.  Instead, we should subtract the minimum
VF resources.  The VF minimum resources are guaranteed to the VFs
and only these should be subtracted from the PF's pool.

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 2018-03-31 13:54:14 -04:00 committed by David S. Miller
parent db4723b3cd
commit 596f9d55fe
1 changed files with 8 additions and 10 deletions
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18
drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
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@ -510,18 +510,16 @@ static int bnxt_hwrm_func_vf_resc_cfg(struct bnxt *bp, int num_vfs)
}
mutex_unlock(&bp->hwrm_cmd_lock);
if (pf->active_vfs) {
u16 n = 1;
u16 n = pf->active_vfs;
if (pf->vf_resv_strategy != BNXT_VF_RESV_STRATEGY_MINIMAL)
n = pf->active_vfs;
hw_resc->max_tx_rings -= vf_tx_rings * n;
hw_resc->max_rx_rings -= vf_rx_rings * n;
hw_resc->max_hw_ring_grps -= vf_ring_grps * n;
hw_resc->max_cp_rings -= vf_cp_rings * n;
hw_resc->max_tx_rings -= le16_to_cpu(req.min_tx_rings) * n;
hw_resc->max_rx_rings -= le16_to_cpu(req.min_rx_rings) * n;
hw_resc->max_hw_ring_grps -= le16_to_cpu(req.min_hw_ring_grps) *
n;
hw_resc->max_cp_rings -= le16_to_cpu(req.min_cmpl_rings) * n;
hw_resc->max_rsscos_ctxs -= pf->active_vfs;
hw_resc->max_stat_ctxs -= vf_stat_ctx * n;
hw_resc->max_vnics -= vf_vnics * n;
hw_resc->max_stat_ctxs -= le16_to_cpu(req.min_stat_ctx) * n;
hw_resc->max_vnics -= le16_to_cpu(req.min_vnics) * n;
rc = pf->active_vfs;
}