From: Michael Chan <michael.chan@broadcom.com>
To: davem@davemloft.net
Cc: netdev@vger.kernel.org
Subject: [PATCH net 4/6] bnxt_en: Fix VF resource checking.
Date: Fri, 13 Oct 2017 21:09:32 -0400 [thread overview]
Message-ID: <1507943374-13308-5-git-send-email-michael.chan@broadcom.com> (raw)
In-Reply-To: <1507943374-13308-1-git-send-email-michael.chan@broadcom.com>
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 <michael.chan@broadcom.com>
---
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
next prev parent reply other threads:[~2017-10-14 1:09 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-14 1:09 [PATCH net 0/6] bnxt_en: bug fixes Michael Chan
2017-10-14 1:09 ` [PATCH net 1/6] bnxt_en: Improve VF/PF link change logic Michael Chan
2017-10-14 1:09 ` [PATCH net 2/6] bnxt_en: Don't use rtnl lock to protect link change logic in workqueue Michael Chan
2017-10-14 1:09 ` [PATCH net 3/6] bnxt_en: Fix VF PCIe link speed and width logic Michael Chan
2017-10-14 1:09 ` Michael Chan [this message]
2017-10-14 1:09 ` [PATCH net 5/6] bnxt_en: Fix possible corrupted NVRAM parameters from firmware response Michael Chan
2017-10-14 1:09 ` [PATCH net 6/6] bnxt_en: Fix possible corruption in DCB parameters from firmware Michael Chan
2017-10-15 1:52 ` [PATCH net 0/6] bnxt_en: bug fixes David Miller
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