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nfp: add support for tx/rx with metadata portid
Allow tx/rx with metadata port id. This will be used for tx/rx of representor netdevs acting as upper-devices while a pf netdev acts as a lower-device. Signed-off-by: Simon Horman <simon.horman@netronome.com> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -318,6 +318,7 @@ struct nfp_meta_parsed {
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u8 csum_type;
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u32 hash;
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u32 mark;
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u32 portid;
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__wsum csum;
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};
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@ -755,6 +755,26 @@ static void nfp_net_tx_xmit_more_flush(struct nfp_net_tx_ring *tx_ring)
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tx_ring->wr_ptr_add = 0;
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}
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static int nfp_net_prep_port_id(struct sk_buff *skb)
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{
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struct metadata_dst *md_dst = skb_metadata_dst(skb);
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unsigned char *data;
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if (likely(!md_dst))
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return 0;
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if (unlikely(md_dst->type != METADATA_HW_PORT_MUX))
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return 0;
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if (unlikely(skb_cow_head(skb, 8)))
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return -ENOMEM;
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data = skb_push(skb, 8);
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put_unaligned_be32(NFP_NET_META_PORTID, data);
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put_unaligned_be32(md_dst->u.port_info.port_id, data + 4);
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return 8;
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}
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/**
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* nfp_net_tx() - Main transmit entry point
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* @skb: SKB to transmit
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@ -767,6 +787,7 @@ static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev)
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struct nfp_net *nn = netdev_priv(netdev);
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const struct skb_frag_struct *frag;
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struct nfp_net_tx_desc *txd, txdg;
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int f, nr_frags, wr_idx, md_bytes;
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struct nfp_net_tx_ring *tx_ring;
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struct nfp_net_r_vector *r_vec;
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struct nfp_net_tx_buf *txbuf;
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@ -774,8 +795,6 @@ static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev)
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struct nfp_net_dp *dp;
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dma_addr_t dma_addr;
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unsigned int fsize;
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int f, nr_frags;
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int wr_idx;
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u16 qidx;
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dp = &nn->dp;
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@ -797,6 +816,13 @@ static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev)
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return NETDEV_TX_BUSY;
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}
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md_bytes = nfp_net_prep_port_id(skb);
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if (unlikely(md_bytes < 0)) {
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nfp_net_tx_xmit_more_flush(tx_ring);
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dev_kfree_skb_any(skb);
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return NETDEV_TX_OK;
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}
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/* Start with the head skbuf */
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dma_addr = dma_map_single(dp->dev, skb->data, skb_headlen(skb),
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DMA_TO_DEVICE);
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@ -815,7 +841,7 @@ static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev)
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/* Build TX descriptor */
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txd = &tx_ring->txds[wr_idx];
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txd->offset_eop = (nr_frags == 0) ? PCIE_DESC_TX_EOP : 0;
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txd->offset_eop = (nr_frags ? 0 : PCIE_DESC_TX_EOP) | md_bytes;
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txd->dma_len = cpu_to_le16(skb_headlen(skb));
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nfp_desc_set_dma_addr(txd, dma_addr);
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txd->data_len = cpu_to_le16(skb->len);
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@ -855,7 +881,7 @@ static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev)
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*txd = txdg;
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txd->dma_len = cpu_to_le16(fsize);
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nfp_desc_set_dma_addr(txd, dma_addr);
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txd->offset_eop =
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txd->offset_eop |=
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(f == nr_frags - 1) ? PCIE_DESC_TX_EOP : 0;
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}
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@ -1450,6 +1476,10 @@ nfp_net_parse_meta(struct net_device *netdev, struct nfp_meta_parsed *meta,
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meta->mark = get_unaligned_be32(data);
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data += 4;
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break;
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case NFP_NET_META_PORTID:
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meta->portid = get_unaligned_be32(data);
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data += 4;
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break;
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case NFP_NET_META_CSUM:
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meta->csum_type = CHECKSUM_COMPLETE;
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meta->csum =
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@ -1594,6 +1624,7 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
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struct nfp_net_rx_buf *rxbuf;
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struct nfp_net_rx_desc *rxd;
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struct nfp_meta_parsed meta;
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struct net_device *netdev;
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dma_addr_t new_dma_addr;
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void *new_frag;
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@ -1672,7 +1703,7 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
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}
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if (xdp_prog && !(rxd->rxd.flags & PCIE_DESC_RX_BPF &&
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dp->bpf_offload_xdp)) {
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dp->bpf_offload_xdp) && !meta.portid) {
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unsigned int dma_off;
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void *hard_start;
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int act;
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@ -1718,6 +1749,20 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
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continue;
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}
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if (likely(!meta.portid)) {
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netdev = dp->netdev;
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} else {
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struct nfp_net *nn;
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nn = netdev_priv(dp->netdev);
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netdev = nfp_app_repr_get(nn->app, meta.portid);
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if (unlikely(!netdev)) {
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nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, skb);
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continue;
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}
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nfp_repr_inc_rx_stats(netdev, pkt_len);
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}
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nfp_net_dma_unmap_rx(dp, rxbuf->dma_addr);
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nfp_net_rx_give_one(dp, rx_ring, new_frag, new_dma_addr);
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@ -1729,7 +1774,7 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
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skb_set_hash(skb, meta.hash, meta.hash_type);
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skb_record_rx_queue(skb, rx_ring->idx);
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skb->protocol = eth_type_trans(skb, dp->netdev);
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skb->protocol = eth_type_trans(skb, netdev);
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nfp_net_rx_csum(dp, r_vec, rxd, &meta, skb);
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