From 2773dfb201e18722265c38dacdea6ecadf933064 Mon Sep 17 00:00:00 2001 From: Michael Chan Date: Thu, 26 Apr 2018 17:44:42 -0400 Subject: [PATCH] bnxt_en: Don't reserve rings on VF when min rings were not provisioned by PF. When rings are more limited and the PF has not provisioned minimum guaranteed rings to the VF, do not reserve rings during driver probe. Wait till device open before reserving rings when they will be used. Device open will succeed if some minimum rings can be successfully reserved and allocated. Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 27 ++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index a45e692cd0ca..0884e4902668 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -5952,6 +5952,9 @@ static int bnxt_init_msix(struct bnxt *bp) if (total_vecs > max) total_vecs = max; + if (!total_vecs) + return 0; + msix_ent = kcalloc(total_vecs, sizeof(struct msix_entry), GFP_KERNEL); if (!msix_ent) return -ENOMEM; @@ -7276,6 +7279,25 @@ skip_uc: return rc; } +static bool bnxt_can_reserve_rings(struct bnxt *bp) +{ +#ifdef CONFIG_BNXT_SRIOV + if ((bp->flags & BNXT_FLAG_NEW_RM) && BNXT_VF(bp)) { + struct bnxt_hw_resc *hw_resc = &bp->hw_resc; + + /* No minimum rings were provisioned by the PF. Don't + * reserve rings by default when device is down. + */ + if (hw_resc->min_tx_rings || hw_resc->resv_tx_rings) + return true; + + if (!netif_running(bp->dev)) + return false; + } +#endif + return true; +} + /* If the chip and firmware supports RFS */ static bool bnxt_rfs_supported(struct bnxt *bp) { @@ -7292,7 +7314,7 @@ static bool bnxt_rfs_capable(struct bnxt *bp) #ifdef CONFIG_RFS_ACCEL int vnics, max_vnics, max_rss_ctxs; - if (!(bp->flags & BNXT_FLAG_MSIX_CAP)) + if (!(bp->flags & BNXT_FLAG_MSIX_CAP) || !bnxt_can_reserve_rings(bp)) return false; vnics = 1 + bp->rx_nr_rings; @@ -8526,6 +8548,9 @@ static int bnxt_set_dflt_rings(struct bnxt *bp, bool sh) { int dflt_rings, max_rx_rings, max_tx_rings, rc; + if (!bnxt_can_reserve_rings(bp)) + return 0; + if (sh) bp->flags |= BNXT_FLAG_SHARED_RINGS; dflt_rings = netif_get_num_default_rss_queues(); -- 2.30.2