netdev - [PATCH net-next 11/11] qede: VF XDP support

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Date:   Sun, 4 Jun 2017 13:31:09 +0300
From:   Yuval Mintz <Yuval.Mintz@...ium.com>
To:     <davem@...emloft.net>, <netdev@...r.kernel.org>
CC:     Yuval Mintz <Yuval.Mintz@...ium.com>
Subject: [PATCH net-next 11/11] qede: VF XDP support

This introduces 2 changes needed for XDP to be supported for VFs:

 a. On VF-side, publish the NDO based on qed outputs

 b. On PF-side, request qed to allocate sufficient cids per-VF
    to allow the child vfs to support it

Signed-off-by: Yuval Mintz <Yuval.Mintz@...ium.com>
---
 drivers/net/ethernet/qlogic/qede/qede_main.c | 34 +++++++++++++++++++++++++---
 1 file changed, 31 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c
index ad1e249..fdf04bc 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_main.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_main.c
@@ -580,6 +580,24 @@ static const struct net_device_ops qede_netdev_vf_ops = {
 	.ndo_features_check = qede_features_check,
 };
 
+static const struct net_device_ops qede_netdev_vf_xdp_ops = {
+	.ndo_open = qede_open,
+	.ndo_stop = qede_close,
+	.ndo_start_xmit = qede_start_xmit,
+	.ndo_set_rx_mode = qede_set_rx_mode,
+	.ndo_set_mac_address = qede_set_mac_addr,
+	.ndo_validate_addr = eth_validate_addr,
+	.ndo_change_mtu = qede_change_mtu,
+	.ndo_vlan_rx_add_vid = qede_vlan_rx_add_vid,
+	.ndo_vlan_rx_kill_vid = qede_vlan_rx_kill_vid,
+	.ndo_set_features = qede_set_features,
+	.ndo_get_stats64 = qede_get_stats64,
+	.ndo_udp_tunnel_add = qede_udp_tunnel_add,
+	.ndo_udp_tunnel_del = qede_udp_tunnel_del,
+	.ndo_features_check = qede_features_check,
+	.ndo_xdp = qede_xdp,
+};
+
 /* -------------------------------------------------------------------------
  * START OF PROBE / REMOVE
  * -------------------------------------------------------------------------
@@ -645,10 +663,14 @@ static void qede_init_ndev(struct qede_dev *edev)
 
 	ndev->watchdog_timeo = TX_TIMEOUT;
 
-	if (IS_VF(edev))
-		ndev->netdev_ops = &qede_netdev_vf_ops;
-	else
+	if (IS_VF(edev)) {
+		if (edev->dev_info.xdp_supported)
+			ndev->netdev_ops = &qede_netdev_vf_xdp_ops;
+		else
+			ndev->netdev_ops = &qede_netdev_vf_ops;
+	} else {
 		ndev->netdev_ops = &qede_netdev_ops;
+	}
 
 	qede_set_ethtool_ops(ndev);
 
@@ -846,6 +868,12 @@ static void qede_update_pf_params(struct qed_dev *cdev)
 	/* 64 rx + 64 tx + 64 XDP */
 	memset(&pf_params, 0, sizeof(struct qed_pf_params));
 	pf_params.eth_pf_params.num_cons = (MAX_SB_PER_PF_MIMD - 1) * 3;
+
+	/* Same for VFs - make sure they'll have sufficient connections
+	 * to support XDP Tx queues.
+	 */
+	pf_params.eth_pf_params.num_vf_cons = 48;
+
 #ifdef CONFIG_RFS_ACCEL
 	pf_params.eth_pf_params.num_arfs_filters = QEDE_RFS_MAX_FLTR;
 #endif
-- 
2.9.4