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path: root/drivers/net/ethernet/intel/i40e/i40e_txrx.c
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Diffstat (limited to 'drivers/net/ethernet/intel/i40e/i40e_txrx.c')
-rw-r--r--drivers/net/ethernet/intel/i40e/i40e_txrx.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index 38eb8151ee9a..3f25bd8c4924 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -3631,6 +3631,56 @@ dma_error:
return -1;
}
+static u16 i40e_swdcb_skb_tx_hash(struct net_device *dev,
+ const struct sk_buff *skb,
+ u16 num_tx_queues)
+{
+ u32 jhash_initval_salt = 0xd631614b;
+ u32 hash;
+
+ if (skb->sk && skb->sk->sk_hash)
+ hash = skb->sk->sk_hash;
+ else
+ hash = (__force u16)skb->protocol ^ skb->hash;
+
+ hash = jhash_1word(hash, jhash_initval_salt);
+
+ return (u16)(((u64)hash * num_tx_queues) >> 32);
+}
+
+u16 i40e_lan_select_queue(struct net_device *netdev,
+ struct sk_buff *skb,
+ struct net_device __always_unused *sb_dev)
+{
+ struct i40e_netdev_priv *np = netdev_priv(netdev);
+ struct i40e_vsi *vsi = np->vsi;
+ struct i40e_hw *hw;
+ u16 qoffset;
+ u16 qcount;
+ u8 tclass;
+ u16 hash;
+ u8 prio;
+
+ /* is DCB enabled at all? */
+ if (vsi->tc_config.numtc == 1)
+ return i40e_swdcb_skb_tx_hash(netdev, skb,
+ netdev->real_num_tx_queues);
+
+ prio = skb->priority;
+ hw = &vsi->back->hw;
+ tclass = hw->local_dcbx_config.etscfg.prioritytable[prio];
+ /* sanity check */
+ if (unlikely(!(vsi->tc_config.enabled_tc & BIT(tclass))))
+ tclass = 0;
+
+ /* select a queue assigned for the given TC */
+ qcount = vsi->tc_config.tc_info[tclass].qcount;
+ hash = i40e_swdcb_skb_tx_hash(netdev, skb, qcount);
+
+ qoffset = vsi->tc_config.tc_info[tclass].qoffset;
+ return qoffset + hash;
+}
+
/**
* i40e_xmit_xdp_ring - transmits an XDP buffer to an XDP Tx ring
* @xdpf: data to transmit