From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Chan Subject: [PATCH net 4/6] bnxt_en: Fix VF resource checking. Date: Fri, 13 Oct 2017 21:09:32 -0400 Message-ID: <1507943374-13308-5-git-send-email-michael.chan@broadcom.com> References: <1507943374-13308-1-git-send-email-michael.chan@broadcom.com> Cc: netdev@vger.kernel.org To: davem@davemloft.net Return-path: Received: from mail-qt0-f172.google.com ([209.85.216.172]:43744 "EHLO mail-qt0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753479AbdJNBJu (ORCPT ); Fri, 13 Oct 2017 21:09:50 -0400 Received: by mail-qt0-f172.google.com with SMTP id j58so11575613qtj.0 for ; Fri, 13 Oct 2017 18:09:50 -0700 (PDT) In-Reply-To: <1507943374-13308-1-git-send-email-michael.chan@broadcom.com> Sender: netdev-owner@vger.kernel.org List-ID: In bnxt_sriov_enable(), we calculate to see if we have enough hardware resources to enable the requested number of VFs. The logic to check for minimum completion rings and statistics contexts is missing. Add the required checks so that VF configuration won't fail. Signed-off-by: Michael Chan --- drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c index d37925a..5ee1866 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c @@ -502,6 +502,7 @@ static int bnxt_sriov_enable(struct bnxt *bp, int *num_vfs) int rc = 0, vfs_supported; int min_rx_rings, min_tx_rings, min_rss_ctxs; int tx_ok = 0, rx_ok = 0, rss_ok = 0; + int avail_cp, avail_stat; /* Check if we can enable requested num of vf's. At a mininum * we require 1 RX 1 TX rings for each VF. In this minimum conf @@ -509,6 +510,10 @@ static int bnxt_sriov_enable(struct bnxt *bp, int *num_vfs) */ vfs_supported = *num_vfs; + avail_cp = bp->pf.max_cp_rings - bp->cp_nr_rings; + avail_stat = bp->pf.max_stat_ctxs - bp->num_stat_ctxs; + avail_cp = min_t(int, avail_cp, avail_stat); + while (vfs_supported) { min_rx_rings = vfs_supported; min_tx_rings = vfs_supported; @@ -523,10 +528,12 @@ static int bnxt_sriov_enable(struct bnxt *bp, int *num_vfs) min_rx_rings) rx_ok = 1; } - if (bp->pf.max_vnics - bp->nr_vnics < min_rx_rings) + if (bp->pf.max_vnics - bp->nr_vnics < min_rx_rings || + avail_cp < min_rx_rings) rx_ok = 0; - if (bp->pf.max_tx_rings - bp->tx_nr_rings >= min_tx_rings) + if (bp->pf.max_tx_rings - bp->tx_nr_rings >= min_tx_rings && + avail_cp >= min_tx_rings) tx_ok = 1; if (bp->pf.max_rsscos_ctxs - bp->rsscos_nr_ctxs >= min_rss_ctxs) -- 1.8.3.1