Subject: Re: VLAN regression caused by: e1000: do vlan cleanup (799d531).

From: Jiri Pirko <[email-masked]>
Date: Tue, 20 Mar 2012 07:26:18 +0100

Tue, Mar 20, 2012 at 12:24:04AM CET, [email-masked] wrote:
>On 03/19/2012 06:08 AM, Jiri Pirko wrote:
>>Tue, Mar 13, 2012 at 07:44:18PM CET, [email-masked] wrote:
>
>>>>I have suspition that vlan filter must be on/offed along with vlan
>>>>accel.
>>>
>>>Ok, if I disable rx-vlan-hw-parse on both NICs, traffic starts working.
>>>
>>>And, if I re-enable rx-vlan-hw-parse on both NICs, it continues to work.
>>>
>>>Maybe the initialization logic needs some fixing?
>>
>>Could you please try following patch?
>
>That patches fixes the problem for me.  Only lightly tested
>at this point, but I have verified VLAN traffic works as desired.

Thank you. I'm going to do proper post of this.

Jirka

>
>Thanks,
>Ben
>
>>
>>diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c
>>index 6419a88..b06c31c 100644
>>--- a/drivers/net/ethernet/intel/e1000/e1000_main.c
>>+++ b/drivers/net/ethernet/intel/e1000/e1000_main.c
>>@@ -164,6 +164,8 @@ static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
>>  static bool e1000_vlan_used(struct e1000_adapter *adapter);
>>  static void e1000_vlan_mode(struct net_device *netdev,
>>  			    netdev_features_t features);
>>+static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
>>+				     bool filter_on);
>>  static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
>>  static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
>>  static void e1000_restore_vlan(struct e1000_adapter *adapter);
>>@@ -1214,7 +1216,7 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
>>  	if (err)
>>  		goto err_register;
>>
>>-	e1000_vlan_mode(netdev, netdev->features);
>>+	e1000_vlan_filter_on_off(adapter, false);
>>
>>  	/* print bus type/speed/width info */
>>  	e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
>>@@ -4772,6 +4774,22 @@ static bool e1000_vlan_used(struct e1000_adapter *adapter)
>>  	return false;
>>  }
>>
>>+static void __e1000_vlan_mode(struct e1000_adapter *adapter,
>>+			      netdev_features_t features)
>>+{
>>+	struct e1000_hw *hw =&adapter->hw;
>>+	u32 ctrl;
>>+
>>+	ctrl = er32(CTRL);
>>+	if (features&  NETIF_F_HW_VLAN_RX) {
>>+		/* enable VLAN tag insert/strip */
>>+		ctrl |= E1000_CTRL_VME;
>>+	} else {
>>+		/* disable VLAN tag insert/strip */
>>+		ctrl&= ~E1000_CTRL_VME;
>>+	}
>>+	ew32(CTRL, ctrl);
>>+}
>>  static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
>>  				     bool filter_on)
>>  {
>>@@ -4781,6 +4799,7 @@ static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
>>  	if (!test_bit(__E1000_DOWN,&adapter->flags))
>>  		e1000_irq_disable(adapter);
>>
>>+	__e1000_vlan_mode(adapter, adapter->netdev->features);
>>  	if (filter_on) {
>>  		/* enable VLAN receive filtering */
>>  		rctl = er32(RCTL);
>>@@ -4801,24 +4820,14 @@ static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
>>  }
>>
>>  static void e1000_vlan_mode(struct net_device *netdev,
>>-	netdev_features_t features)
>>+			    netdev_features_t features)
>>  {
>>  	struct e1000_adapter *adapter = netdev_priv(netdev);
>>-	struct e1000_hw *hw =&adapter->hw;
>>-	u32 ctrl;
>>
>>  	if (!test_bit(__E1000_DOWN,&adapter->flags))
>>  		e1000_irq_disable(adapter);
>>
>>-	ctrl = er32(CTRL);
>>-	if (features&  NETIF_F_HW_VLAN_RX) {
>>-		/* enable VLAN tag insert/strip */
>>-		ctrl |= E1000_CTRL_VME;
>>-	} else {
>>-		/* disable VLAN tag insert/strip */
>>-		ctrl&= ~E1000_CTRL_VME;
>>-	}
>>-	ew32(CTRL, ctrl);
>>+	__e1000_vlan_mode(adapter, features);
>>
>>  	if (!test_bit(__E1000_DOWN,&adapter->flags))
>>  		e1000_irq_enable(adapter);
>
>
>-- 
>Ben Greear <[email-masked]>
>Candela Technologies Inc  http://www.candelatech.com
>

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