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authorAjit Khaparde <ajitkhaparde@gmail.com>2010-02-09 04:34:57 +0300
committerDavid S. Miller <davem@davemloft.net>2010-02-12 23:27:59 +0300
commit82903e4bfca1578336a91c0c17839b484c12295d (patch)
tree05788518e497b647076fcbb6d8d068b86ae17316 /drivers
parent205859a2ff922d0587a819b08007398cbd0a6a30 (diff)
downloadlinux-82903e4bfca1578336a91c0c17839b484c12295d.tar.xz
be2net: fix to limit max vlans supported in certain skews
In certain skews the ASIC can support only 16 vlans per interface. Once the limit is crossed, the ASIC is programmed in vlan promiscuous mode. Switch off the vlan promiscuous mode once the number of vlans falls back to the max vlans supported. Signed-off-by: Ajit Khaparde <ajitk@serverengines.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/benet/be.h3
-rw-r--r--drivers/net/benet/be_main.c30
2 files changed, 19 insertions, 14 deletions
diff --git a/drivers/net/benet/be.h b/drivers/net/benet/be.h
index 242013157f20..476a5c455794 100644
--- a/drivers/net/benet/be.h
+++ b/drivers/net/benet/be.h
@@ -250,7 +250,8 @@ struct be_adapter {
bool rx_post_starved; /* Zero rx frags have been posted to BE */
struct vlan_group *vlan_grp;
- u16 num_vlans;
+ u16 vlans_added;
+ u16 max_vlans; /* Number of vlans supported */
u8 vlan_tag[VLAN_GROUP_ARRAY_LEN];
struct be_dma_mem mc_cmd_mem;
diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
index 1951d7620a88..92c55f679466 100644
--- a/drivers/net/benet/be_main.c
+++ b/drivers/net/benet/be_main.c
@@ -488,17 +488,16 @@ static int be_change_mtu(struct net_device *netdev, int new_mtu)
}
/*
- * if there are BE_NUM_VLANS_SUPPORTED or lesser number of VLANS configured,
- * program them in BE. If more than BE_NUM_VLANS_SUPPORTED are configured,
- * set the BE in promiscuous VLAN mode.
+ * A max of 64 (BE_NUM_VLANS_SUPPORTED) vlans can be configured in BE.
+ * If the user configures more, place BE in vlan promiscuous mode.
*/
static int be_vid_config(struct be_adapter *adapter)
{
u16 vtag[BE_NUM_VLANS_SUPPORTED];
u16 ntags = 0, i;
- int status;
+ int status = 0;
- if (adapter->num_vlans <= BE_NUM_VLANS_SUPPORTED) {
+ if (adapter->vlans_added <= adapter->max_vlans) {
/* Construct VLAN Table to give to HW */
for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
if (adapter->vlan_tag[i]) {
@@ -532,21 +531,21 @@ static void be_vlan_add_vid(struct net_device *netdev, u16 vid)
{
struct be_adapter *adapter = netdev_priv(netdev);
- adapter->num_vlans++;
adapter->vlan_tag[vid] = 1;
-
- be_vid_config(adapter);
+ adapter->vlans_added++;
+ if (adapter->vlans_added <= (adapter->max_vlans + 1))
+ be_vid_config(adapter);
}
static void be_vlan_rem_vid(struct net_device *netdev, u16 vid)
{
struct be_adapter *adapter = netdev_priv(netdev);
- adapter->num_vlans--;
adapter->vlan_tag[vid] = 0;
-
vlan_group_set_device(adapter->vlan_grp, vid, NULL);
- be_vid_config(adapter);
+ adapter->vlans_added--;
+ if (adapter->vlans_added <= adapter->max_vlans)
+ be_vid_config(adapter);
}
static void be_set_multicast_list(struct net_device *netdev)
@@ -786,7 +785,7 @@ static void be_rx_compl_process(struct be_adapter *adapter,
skb->dev = adapter->netdev;
if (vlanf) {
- if (!adapter->vlan_grp || adapter->num_vlans == 0) {
+ if (!adapter->vlan_grp || adapter->vlans_added == 0) {
kfree_skb(skb);
return;
}
@@ -866,7 +865,7 @@ static void be_rx_compl_process_gro(struct be_adapter *adapter,
vid = AMAP_GET_BITS(struct amap_eth_rx_compl, vlan_tag, rxcp);
vid = be16_to_cpu(vid);
- if (!adapter->vlan_grp || adapter->num_vlans == 0)
+ if (!adapter->vlan_grp || adapter->vlans_added == 0)
return;
vlan_gro_frags(&eq_obj->napi, adapter->vlan_grp, vid);
@@ -2241,6 +2240,11 @@ static int be_get_config(struct be_adapter *adapter)
memcpy(adapter->netdev->dev_addr, mac, ETH_ALEN);
memcpy(adapter->netdev->perm_addr, mac, ETH_ALEN);
+ if (adapter->cap & 0x400)
+ adapter->max_vlans = BE_NUM_VLANS_SUPPORTED/4;
+ else
+ adapter->max_vlans = BE_NUM_VLANS_SUPPORTED;
+
return 0;
}