[net-next PATCH v2 3/6] i40e: Sync link state between VFs and VFPRs
From: Sridhar Samudrala <sridhar.samudrala@intel.com>
Date: 2017-01-03 18:11:02
Also in:
intel-wired-lan
Subsystem:
intel ethernet drivers, networking drivers, the rest · Maintainers:
Tony Nguyen, Przemek Kitszel, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 00:00:00:00:00:00 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 00:00:00:00:00:00 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@intel.com>
---
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 44 ++++++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 63da829..0c8687d 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c@@ -1031,6 +1031,13 @@ 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; }
@@ -1042,6 +1049,13 @@ 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; }
@@ -1127,6 +1141,13 @@ 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; }
@@ -1151,6 +1172,10 @@ 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); } /**
@@ -1910,6 +1935,10 @@ static int i40e_vc_enable_queues_msg(struct i40e_vf *vf, u8 *msg, u16 msglen) if (i40e_vsi_start_rings(pf->vsi[vf->lan_vsi_idx])) aq_ret = I40E_ERR_TIMEOUT; + + if ((0 == aq_ret) && 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,
@@ -1949,6 +1978,9 @@ static int i40e_vc_disable_queues_msg(struct i40e_vf *vf, u8 *msg, u16 msglen) i40e_vsi_stop_rings(pf->vsi[vf->lan_vsi_idx]); + if ((0 == aq_ret) && 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,
@@ -3189,6 +3221,7 @@ 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;
@@ -3231,6 +3264,17 @@ 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