From: Mintz, Yuval <Yuval.Mintz@cavium.com>
Date: Fri, 7 Apr 2017 08:04:59 +0000 (+0300)
Subject: qede: Prevent VFs from using XDP
X-Git-Tag: v4.12-rc1~64^3~228^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=40b8c45492efc97d9d397475bf475d497fbb9174;p=platform%2Fkernel%2Flinux-exynos.git

qede: Prevent VFs from using XDP

Current implementation of VFs is very tight in regard to queue
resources. VFs support for XDP would require quite a bit of additional
infrastructure in qede and qed [sharing of queue-zones between queues,
more VF cids, mapping of the doorbell bar, etc.].

For now, prevent XDP programs from being attached to VFs.

Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/qlogic/qede/qede_filter.c b/drivers/net/ethernet/qlogic/qede/qede_filter.c
index 107c3fd..ecd5b3a 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_filter.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_filter.c
@@ -537,6 +537,11 @@ int qede_xdp(struct net_device *dev, struct netdev_xdp *xdp)
 {
 	struct qede_dev *edev = netdev_priv(dev);
 
+	if (IS_VF(edev)) {
+		DP_NOTICE(edev, "VFs don't support XDP\n");
+		return -EOPNOTSUPP;
+	}
+
 	switch (xdp->command) {
 	case XDP_SETUP_PROG:
 		return qede_xdp_set(edev, xdp->prog);