From: sven.auhagen@voleatech.de
To: anthony.l.nguyen@intel.com, maciej.fijalkowski@intel.com
Cc: davem@davemloft.net, intel-wired-lan@lists.osuosl.org,
netdev@vger.kernel.org, nhorman@redhat.com, sassmann@redhat.com,
sandeep.penigalapati@intel.com, brouer@redhat.com
Subject: [PATCH v2 2/6] igb: take vlan double header into account
Date: Sat, 17 Oct 2020 09:12:34 +0200 [thread overview]
Message-ID: <20201017071238.95190-3-sven.auhagen@voleatech.de> (raw)
In-Reply-To: <20201017071238.95190-1-sven.auhagen@voleatech.de>
From: Sven Auhagen <sven.auhagen@voleatech.de>
Increase the packet header padding to include double VLAN tagging.
This patch uses a macro for this.
Signed-off-by: Sven Auhagen <sven.auhagen@voleatech.de>
Suggested-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
---
drivers/net/ethernet/intel/igb/igb.h | 5 +++++
drivers/net/ethernet/intel/igb/igb_main.c | 7 +++----
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h
index 0286d2fceee4..aaa954aae574 100644
--- a/drivers/net/ethernet/intel/igb/igb.h
+++ b/drivers/net/ethernet/intel/igb/igb.h
@@ -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,
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 08cc6f59aa2e..0a9198037b98 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -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;
--
2.20.1
next prev parent reply other threads:[~2020-10-17 7:12 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-17 7:12 [PATCH v2 0/6] igb: xdp patches followup sven.auhagen
2020-10-17 7:12 ` [PATCH v2 1/6] igb: XDP xmit back fix error code sven.auhagen
2020-10-17 7:12 ` sven.auhagen [this message]
2020-10-17 7:12 ` [PATCH v2 3/6] igb: XDP extack message on error sven.auhagen
2020-10-17 7:12 ` [PATCH v2 4/6] igb: skb add metasize for xdp sven.auhagen
2020-10-17 7:12 ` [PATCH v2 5/6] igb: use xdp_do_flush sven.auhagen
2020-10-17 7:12 ` [PATCH v2 6/6] igb: avoid transmit queue timeout in xdp path sven.auhagen
2020-10-18 13:28 ` Maciej Fijalkowski
2020-10-18 13:39 ` [PATCH v2 0/6] igb: xdp patches followup Maciej Fijalkowski
2020-10-18 19:03 ` Jakub Kicinski
2020-10-19 5:43 ` Sven Auhagen
2020-10-19 5:43 ` Sven Auhagen
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