[PATCH net-next 09/16] bnxt_en: Improve resource accounting for SRIOV.
From: Michael Chan <michael.chan@broadcom.com>
Date: 2018-03-31 17:55:08
Subsystem:
broadcom bnxt_en 50 gigabit ethernet driver, networking drivers, the rest · Maintainers:
Michael Chan, Pavan Chebbi, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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> --- drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
index a3d368e..4fa4761 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c@@ -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; }
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1.8.3.1