diff mbox series

[iwl-next,v6,09/10] ice: enforce no DCB config changing when in bond

Message ID 20230620221854.848606-10-david.m.ertman@intel.com
State Accepted
Delegated to: Anthony Nguyen
Headers show
Series Implement support for SRIOV + LAG | expand

Commit Message

Dave Ertman June 20, 2023, 10:18 p.m. UTC 
To support SRIOV LAG, the driver cannot allow changes to an interface's DCB
configuration when in a bond.  This would break the ability to modify
interfaces Tx scheduling for fail-over interfaces.

Block kernel generated DCB config events when in a bond.

Reviewed-by: Daniel Machon <daniel.machon@microchip.com>
Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_dcb_nl.c | 50 +++++++++++++++++++++
 1 file changed, 50 insertions(+)

Comments

Buvaneswaran, Sujai July 7, 2023, 12:02 p.m. UTC | #1 
> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf Of
> Dave Ertman
> Sent: Wednesday, June 21, 2023 3:49 AM
> To: intel-wired-lan@lists.osuosl.org
> Cc: netdev@vger.kernel.org; bcreeley@amd.com;
> daniel.machon@microchip.com; simon.horman@corigine.com
> Subject: [Intel-wired-lan] [PATCH iwl-next v6 09/10] ice: enforce no DCB
> config changing when in bond
> 
> To support SRIOV LAG, the driver cannot allow changes to an interface's DCB
> configuration when in a bond.  This would break the ability to modify
> interfaces Tx scheduling for fail-over interfaces.
> 
> Block kernel generated DCB config events when in a bond.
> 
> Reviewed-by: Daniel Machon <daniel.machon@microchip.com>
> Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
> ---
>  drivers/net/ethernet/intel/ice/ice_dcb_nl.c | 50 +++++++++++++++++++++
>  1 file changed, 50 insertions(+)
> 
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@intel.com>
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/ice/ice_dcb_nl.c b/drivers/net/ethernet/intel/ice/ice_dcb_nl.c
index 3eb01731e496..e1fbc6de452d 100644
--- a/drivers/net/ethernet/intel/ice/ice_dcb_nl.c
+++ b/drivers/net/ethernet/intel/ice/ice_dcb_nl.c
@@ -70,6 +70,11 @@  static int ice_dcbnl_setets(struct net_device *netdev, struct ieee_ets *ets)
 	    !(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
 		return -EINVAL;
 
+	if (pf->lag && pf->lag->bonded) {
+		netdev_err(netdev, "DCB changes not allowed when in a bond\n");
+		return -EINVAL;
+	}
+
 	new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg;
 
 	mutex_lock(&pf->tc_mutex);
@@ -170,6 +175,11 @@  static u8 ice_dcbnl_setdcbx(struct net_device *netdev, u8 mode)
 	if (mode == pf->dcbx_cap)
 		return ICE_DCB_NO_HW_CHG;
 
+	if (pf->lag && pf->lag->bonded) {
+		netdev_err(netdev, "DCB changes not allowed when in a bond\n");
+		return ICE_DCB_NO_HW_CHG;
+	}
+
 	qos_cfg = &pf->hw.port_info->qos_cfg;
 
 	/* DSCP configuration is not DCBx negotiated */
@@ -261,6 +271,11 @@  static int ice_dcbnl_setpfc(struct net_device *netdev, struct ieee_pfc *pfc)
 	    !(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
 		return -EINVAL;
 
+	if (pf->lag && pf->lag->bonded) {
+		netdev_err(netdev, "DCB changes not allowed when in a bond\n");
+		return -EINVAL;
+	}
+
 	mutex_lock(&pf->tc_mutex);
 
 	new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg;
@@ -323,6 +338,11 @@  static void ice_dcbnl_set_pfc_cfg(struct net_device *netdev, int prio, u8 set)
 	if (prio >= ICE_MAX_USER_PRIORITY)
 		return;
 
+	if (pf->lag && pf->lag->bonded) {
+		netdev_err(netdev, "DCB changes not allowed when in a bond\n");
+		return;
+	}
+
 	new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg;
 
 	new_cfg->pfc.pfccap = pf->hw.func_caps.common_cap.maxtc;
@@ -379,6 +399,11 @@  static u8 ice_dcbnl_setstate(struct net_device *netdev, u8 state)
 	    !(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
 		return ICE_DCB_NO_HW_CHG;
 
+	if (pf->lag && pf->lag->bonded) {
+		netdev_err(netdev, "DCB changes not allowed when in a bond\n");
+		return ICE_DCB_NO_HW_CHG;
+	}
+
 	/* Nothing to do */
 	if (!!state == test_bit(ICE_FLAG_DCB_ENA, pf->flags))
 		return ICE_DCB_NO_HW_CHG;
@@ -451,6 +476,11 @@  ice_dcbnl_set_pg_tc_cfg_tx(struct net_device *netdev, int tc,
 	if (tc >= ICE_MAX_TRAFFIC_CLASS)
 		return;
 
+	if (pf->lag && pf->lag->bonded) {
+		netdev_err(netdev, "DCB changes not allowed when in a bond\n");
+		return;
+	}
+
 	new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg;
 
 	/* prio_type, bwg_id and bw_pct per UP are not supported */
@@ -505,6 +535,11 @@  ice_dcbnl_set_pg_bwg_cfg_tx(struct net_device *netdev, int pgid, u8 bw_pct)
 	if (pgid >= ICE_MAX_TRAFFIC_CLASS)
 		return;
 
+	if (pf->lag && pf->lag->bonded) {
+		netdev_err(netdev, "DCB changes not allowed when in a bond\n");
+		return;
+	}
+
 	new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg;
 
 	new_cfg->etscfg.tcbwtable[pgid] = bw_pct;
@@ -725,6 +760,11 @@  static int ice_dcbnl_setapp(struct net_device *netdev, struct dcb_app *app)
 		return -EINVAL;
 	}
 
+	if (pf->lag && pf->lag->bonded) {
+		netdev_err(netdev, "DCB changes not allowed when in a bond\n");
+		return -EINVAL;
+	}
+
 	max_tc = pf->hw.func_caps.common_cap.maxtc;
 	if (app->priority >= max_tc) {
 		netdev_err(netdev, "TC %d out of range, max TC %d\n",
@@ -836,6 +876,11 @@  static int ice_dcbnl_delapp(struct net_device *netdev, struct dcb_app *app)
 		return -EINVAL;
 	}
 
+	if (pf->lag && pf->lag->bonded) {
+		netdev_err(netdev, "DCB changes not allowed when in a bond\n");
+		return -EINVAL;
+	}
+
 	mutex_lock(&pf->tc_mutex);
 	old_cfg = &pf->hw.port_info->qos_cfg.local_dcbx_cfg;
 
@@ -937,6 +982,11 @@  static u8 ice_dcbnl_cee_set_all(struct net_device *netdev)
 	    !(pf->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
 		return ICE_DCB_NO_HW_CHG;
 
+	if (pf->lag && pf->lag->bonded) {
+		netdev_err(netdev, "DCB changes not allowed when in a bond\n");
+		return ICE_DCB_NO_HW_CHG;
+	}
+
 	new_cfg = &pf->hw.port_info->qos_cfg.desired_dcbx_cfg;
 
 	mutex_lock(&pf->tc_mutex);