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igb: take VLAN double header into account 

Increase the packet header padding to include double VLAN tagging.
This patch uses a macro for this.

Fixes: 9cbc948b5a ("igb: add XDP support")
Suggested-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Sven Auhagen <sven.auhagen@voleatech.de>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Sven Auhagen 2020-11-11 18:04:49 +01:00 committed by Tony Nguyen
parent cfb33e174f
commit b829ec1a66
2 changed files with 8 additions and 4 deletions
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5
drivers/net/ethernet/intel/igb/igb.h
View File

@ -138,6 +138,8 @@ struct vf_mac_filter {
/* this is the size past which hardware will drop packets when setting LPE=0 */
#define MAXIMUM_ETHERNET_VLAN_SIZE 1522
#define IGB_ETH_PKT_HDR_PAD (ETH_HLEN + ETH_FCS_LEN + (VLAN_HLEN * 2))
/* Supported Rx Buffer Sizes */
#define IGB_RXBUFFER_256 256
#define IGB_RXBUFFER_1536 1536
@ -247,6 +249,9 @@ enum igb_tx_flags {
#define IGB_SFF_ADDRESSING_MODE 0x4
#define IGB_SFF_8472_UNSUP 0x00
/* TX resources are shared between XDP and netstack
* and we need to tag the buffer type to distinguish them
*/
enum igb_tx_buf_type {
IGB_TYPE_SKB = 0,
IGB_TYPE_XDP,

7
drivers/net/ethernet/intel/igb/igb_main.c
View File

@ -2826,7 +2826,7 @@ static int igb_setup_tc(struct net_device *dev, enum tc_setup_type type,
static int igb_xdp_setup(struct net_device *dev, struct bpf_prog *prog)
{
int i, frame_size = dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
int i, frame_size = dev->mtu + IGB_ETH_PKT_HDR_PAD;
struct igb_adapter *adapter = netdev_priv(dev);
bool running = netif_running(dev);
struct bpf_prog *old_prog;
@ -3950,8 +3950,7 @@ static int igb_sw_init(struct igb_adapter *adapter)
/* set default work limits */
adapter->tx_work_limit = IGB_DEFAULT_TX_WORK;
adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN +
VLAN_HLEN;
adapter->max_frame_size = netdev->mtu + IGB_ETH_PKT_HDR_PAD;
adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
spin_lock_init(&adapter->nfc_lock);
@ -6491,7 +6490,7 @@ static void igb_get_stats64(struct net_device *netdev,
static int igb_change_mtu(struct net_device *netdev, int new_mtu)
{
struct igb_adapter *adapter = netdev_priv(netdev);
int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
int max_frame = new_mtu + IGB_ETH_PKT_HDR_PAD;
if (adapter->xdp_prog) {
int i;