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Message-Id: <1484009990-3018-4-git-send-email-sridhar.samudrala@intel.com>
Date: Mon, 9 Jan 2017 16:59:46 -0800
From: Sridhar Samudrala <sridhar.samudrala@...el.com>
To: alexander.h.duyck@...el.com, john.r.fastabend@...el.com,
anjali.singhai@...el.com, jakub.kicinski@...ronome.com,
davem@...emloft.net, scott.d.peterson@...el.com,
gerlitz.or@...il.com, jiri@...nulli.us,
intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org
Subject: [next-queue v3 PATCH 3/7] i40e: Sync link state between VFs and VFPRs
This patch enables
- reflecting the link state of VFPR based on VF admin state & link state
of VF based on admin state of VFPR.
- bringing up/down the VFPR sends a notification to update VF link state.
- bringing up/down the VF will cause the link state update of VFPR.
- enable/disable VF link state via ndo_set_vf_link_state will update the
admin state of associated VFPR.
PF: enp5s0f0, VFs: enp5s2,enp5s2f1 VFPRs:enp5s0f0-vf0, enp5s0f0-vf1
# rmmod i40e; modprobe i40e
# devlink dev eswitch set pci/0000:05:00.0 mode switchdev
# echo 2 > /sys/class/net/enp5s0f0/device/sriov_numvfs
# ip link set enp5s2 up
# ip link set enp5s0f0-vf0 up
# ip link set enp5s0f0-vf1 up
/* enp5s2 UP -> enp5s0f0-vf0 CARRIER ON */
# ip link show enp5s0f0-vf0
215: enp5s0f0-vf0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff
/* enp5s0f0-vf0 UP -> enp5s2 CARRIER ON */
# ip link show enp5s2
218: enp5s2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
link/ether ea:4d:60:bc:6f:85 brd ff:ff:ff:ff:ff:ff
/* enp5s2f1 DOWN -> enp5s0f0-vf1 NO-CARRIER */
# ip link show enp5s0f0-vf1
216: enp5s0f0-vf1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000
link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff
# ip link set enp5s0f0-vf0 down
# ip link set enp5s2f1 up
/* enp5s0-vf0 DOWN -> enp5s2 NO_CARRIER */
# ip link show enp5s2
218: enp5s2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
link/ether ea:4d:60:bc:6f:85 brd ff:ff:ff:ff:ff:ff
# ip -d link show enp5s0f0
213: enp5s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop portid 6805ca27268 state DOWN mode DEFAULT group default qlen 1000
link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff promiscuity 0 addrgenmode eui64
vf 0 MAC 00:00:00:00:00:00, spoof checking on, link-state disable, trust off
vf 1 MAC 00:00:00:00:00:00, spoof checking on, link-state enable, trust off
Signed-off-by: Sridhar Samudrala <sridhar.samudrala@...el.com>
---
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 54 ++++++++++++++++++++++
1 file changed, 54 insertions(+)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index f9927dc..275113c 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1029,6 +1029,13 @@ void i40e_reset_vf(struct i40e_vf *vf, bool flr)
**/
static int i40e_vfpr_netdev_open(struct net_device *dev)
{
+ struct i40e_vfpr_netdev_priv *priv = netdev_priv(dev);
+ struct i40e_vf *vf = priv->vf;
+
+ vf->link_forced = true;
+ vf->link_up = true;
+ i40e_vc_notify_vf_link_state(vf);
+
return 0;
}
@@ -1040,6 +1047,13 @@ static int i40e_vfpr_netdev_open(struct net_device *dev)
**/
static int i40e_vfpr_netdev_stop(struct net_device *dev)
{
+ struct i40e_vfpr_netdev_priv *priv = netdev_priv(dev);
+ struct i40e_vf *vf = priv->vf;
+
+ vf->link_forced = true;
+ vf->link_up = false;
+ i40e_vc_notify_vf_link_state(vf);
+
return 0;
}
@@ -1126,6 +1140,13 @@ int i40e_alloc_vfpr_netdev(struct i40e_vf *vf, u16 vf_num)
/* Delete broadcast filter for VF */
i40e_update_vf_broadcast_filter(vf, false);
+ /* Reset VF link as we are changing the mode to 'switchdev'. VFPR netdev
+ * needs to be brought up to enable VF link.
+ */
+ vf->link_forced = true;
+ vf->link_up = false;
+ i40e_vc_notify_vf_link_state(vf);
+
return 0;
}
@@ -1150,6 +1171,10 @@ void i40e_free_vfpr_netdev(struct i40e_vf *vf)
/* Add broadcast filter to VF */
i40e_update_vf_broadcast_filter(vf, true);
+
+ /* In legacy mode, VF link is not controlled by VFPR */
+ vf->link_forced = false;
+ i40e_vc_notify_vf_link_state(vf);
}
/**
@@ -1907,8 +1932,17 @@ static int i40e_vc_enable_queues_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
goto error_param;
}
+ if (vf->link_forced && !vf->link_up) {
+ aq_ret = I40E_ERR_PARAM;
+ goto error_param;
+ }
+
if (i40e_vsi_start_rings(pf->vsi[vf->lan_vsi_idx]))
aq_ret = I40E_ERR_TIMEOUT;
+
+ if ((aq_ret == 0) && vf->vfpr_netdev)
+ netif_carrier_on(vf->vfpr_netdev);
+
error_param:
/* send the response to the VF */
return i40e_vc_send_resp_to_vf(vf, I40E_VIRTCHNL_OP_ENABLE_QUEUES,
@@ -1946,8 +1980,16 @@ static int i40e_vc_disable_queues_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
goto error_param;
}
+ if (vf->link_forced && vf->link_up) {
+ aq_ret = I40E_ERR_PARAM;
+ goto error_param;
+ }
+
i40e_vsi_stop_rings(pf->vsi[vf->lan_vsi_idx]);
+ if ((aq_ret == 0) && vf->vfpr_netdev)
+ netif_carrier_off(vf->vfpr_netdev);
+
error_param:
/* send the response to the VF */
return i40e_vc_send_resp_to_vf(vf, I40E_VIRTCHNL_OP_DISABLE_QUEUES,
@@ -3183,6 +3225,7 @@ int i40e_ndo_set_vf_link_state(struct net_device *netdev, int vf_id, int link)
struct i40e_netdev_priv *np = netdev_priv(netdev);
struct i40e_pf *pf = np->vsi->back;
struct i40e_virtchnl_pf_event pfe;
+ struct net_device *vfpr_netdev;
struct i40e_hw *hw = &pf->hw;
struct i40e_vf *vf;
int abs_vf_id;
@@ -3225,6 +3268,17 @@ int i40e_ndo_set_vf_link_state(struct net_device *netdev, int vf_id, int link)
ret = -EINVAL;
goto error_out;
}
+
+ vfpr_netdev = vf->vfpr_netdev;
+ if (vfpr_netdev) {
+ unsigned int flags = vfpr_netdev->flags;
+
+ if (vf->link_up)
+ dev_change_flags(vfpr_netdev, flags | IFF_UP);
+ else
+ dev_change_flags(vfpr_netdev, flags & ~IFF_UP);
+ }
+
/* Notify the VF of its new link state */
i40e_aq_send_msg_to_vf(hw, abs_vf_id, I40E_VIRTCHNL_OP_EVENT,
0, (u8 *)&pfe, sizeof(pfe), NULL);
--
2.5.5
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