From 91bf82ca9eed1aa3e700a1b9fcaaa7922df6a4c7 Mon Sep 17 00:00:00 2001 From: Simon Horman Date: Fri, 23 Jun 2017 22:12:06 +0200 Subject: [PATCH] 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 Reviewed-by: Jakub Kicinski Signed-off-by: David S. Miller --- drivers/net/ethernet/netronome/nfp/nfp_net.h | 1 + .../ethernet/netronome/nfp/nfp_net_common.c | 57 +++++++++++++++++-- 2 files changed, 52 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net.h b/drivers/net/ethernet/netronome/nfp/nfp_net.h index b7446793106d..b1fa77bd708b 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h @@ -318,6 +318,7 @@ struct nfp_meta_parsed { u8 csum_type; u32 hash; u32 mark; + u32 portid; __wsum csum; }; diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index 2134493ec8a8..2e728543e840 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -755,6 +755,26 @@ static void nfp_net_tx_xmit_more_flush(struct nfp_net_tx_ring *tx_ring) tx_ring->wr_ptr_add = 0; } +static int nfp_net_prep_port_id(struct sk_buff *skb) +{ + struct metadata_dst *md_dst = skb_metadata_dst(skb); + unsigned char *data; + + if (likely(!md_dst)) + return 0; + if (unlikely(md_dst->type != METADATA_HW_PORT_MUX)) + return 0; + + if (unlikely(skb_cow_head(skb, 8))) + return -ENOMEM; + + data = skb_push(skb, 8); + put_unaligned_be32(NFP_NET_META_PORTID, data); + put_unaligned_be32(md_dst->u.port_info.port_id, data + 4); + + return 8; +} + /** * nfp_net_tx() - Main transmit entry point * @skb: SKB to transmit @@ -767,6 +787,7 @@ static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev) struct nfp_net *nn = netdev_priv(netdev); const struct skb_frag_struct *frag; struct nfp_net_tx_desc *txd, txdg; + int f, nr_frags, wr_idx, md_bytes; struct nfp_net_tx_ring *tx_ring; struct nfp_net_r_vector *r_vec; struct nfp_net_tx_buf *txbuf; @@ -774,8 +795,6 @@ static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev) struct nfp_net_dp *dp; dma_addr_t dma_addr; unsigned int fsize; - int f, nr_frags; - int wr_idx; u16 qidx; dp = &nn->dp; @@ -797,6 +816,13 @@ static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev) return NETDEV_TX_BUSY; } + md_bytes = nfp_net_prep_port_id(skb); + if (unlikely(md_bytes < 0)) { + nfp_net_tx_xmit_more_flush(tx_ring); + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; + } + /* Start with the head skbuf */ dma_addr = dma_map_single(dp->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); @@ -815,7 +841,7 @@ static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev) /* Build TX descriptor */ txd = &tx_ring->txds[wr_idx]; - txd->offset_eop = (nr_frags == 0) ? PCIE_DESC_TX_EOP : 0; + txd->offset_eop = (nr_frags ? 0 : PCIE_DESC_TX_EOP) | md_bytes; txd->dma_len = cpu_to_le16(skb_headlen(skb)); nfp_desc_set_dma_addr(txd, dma_addr); txd->data_len = cpu_to_le16(skb->len); @@ -855,7 +881,7 @@ static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev) *txd = txdg; txd->dma_len = cpu_to_le16(fsize); nfp_desc_set_dma_addr(txd, dma_addr); - txd->offset_eop = + txd->offset_eop |= (f == nr_frags - 1) ? PCIE_DESC_TX_EOP : 0; } @@ -1450,6 +1476,10 @@ nfp_net_parse_meta(struct net_device *netdev, struct nfp_meta_parsed *meta, meta->mark = get_unaligned_be32(data); data += 4; break; + case NFP_NET_META_PORTID: + meta->portid = get_unaligned_be32(data); + data += 4; + break; case NFP_NET_META_CSUM: meta->csum_type = CHECKSUM_COMPLETE; meta->csum = @@ -1594,6 +1624,7 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) struct nfp_net_rx_buf *rxbuf; struct nfp_net_rx_desc *rxd; struct nfp_meta_parsed meta; + struct net_device *netdev; dma_addr_t new_dma_addr; void *new_frag; @@ -1672,7 +1703,7 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) } if (xdp_prog && !(rxd->rxd.flags & PCIE_DESC_RX_BPF && - dp->bpf_offload_xdp)) { + dp->bpf_offload_xdp) && !meta.portid) { unsigned int dma_off; void *hard_start; int act; @@ -1718,6 +1749,20 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) continue; } + if (likely(!meta.portid)) { + netdev = dp->netdev; + } else { + struct nfp_net *nn; + + nn = netdev_priv(dp->netdev); + netdev = nfp_app_repr_get(nn->app, meta.portid); + if (unlikely(!netdev)) { + nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, skb); + continue; + } + nfp_repr_inc_rx_stats(netdev, pkt_len); + } + nfp_net_dma_unmap_rx(dp, rxbuf->dma_addr); nfp_net_rx_give_one(dp, rx_ring, new_frag, new_dma_addr); @@ -1729,7 +1774,7 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) skb_set_hash(skb, meta.hash, meta.hash_type); skb_record_rx_queue(skb, rx_ring->idx); - skb->protocol = eth_type_trans(skb, dp->netdev); + skb->protocol = eth_type_trans(skb, netdev); nfp_net_rx_csum(dp, r_vec, rxd, &meta, skb); -- 2.30.2