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net/mlx5e: IPoIB, RX handler

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Implement IPoIB RX SKB handler.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Saeed Mahameed 2017-04-13 06:37:04 +03:00 committed by David S. Miller
parent 20fd0c193f
commit 9d6bd752c6
3 changed files with 81 additions and 0 deletions
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78
drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
View File

@ -1031,3 +1031,81 @@ void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq)
mlx5e_page_release(rq, di, false);
}
}
#ifdef CONFIG_MLX5_CORE_IPOIB
#define MLX5_IB_GRH_DGID_OFFSET 24
#define MLX5_IB_GRH_BYTES 40
#define MLX5_IPOIB_ENCAP_LEN 4
#define MLX5_GID_SIZE 16
static inline void mlx5i_complete_rx_cqe(struct mlx5e_rq *rq,
struct mlx5_cqe64 *cqe,
u32 cqe_bcnt,
struct sk_buff *skb)
{
struct net_device *netdev = rq->netdev;
u8 *dgid;
u8 g;
g = (be32_to_cpu(cqe->flags_rqpn) >> 28) & 3;
dgid = skb->data + MLX5_IB_GRH_DGID_OFFSET;
if ((!g) || dgid[0] != 0xff)
skb->pkt_type = PACKET_HOST;
else if (memcmp(dgid, netdev->broadcast + 4, MLX5_GID_SIZE) == 0)
skb->pkt_type = PACKET_BROADCAST;
else
skb->pkt_type = PACKET_MULTICAST;
/* TODO: IB/ipoib: Allow mcast packets from other VFs
* 68996a6e760e5c74654723eeb57bf65628ae87f4
*/
skb_pull(skb, MLX5_IB_GRH_BYTES);
skb->protocol = *((__be16 *)(skb->data));
skb->ip_summed = CHECKSUM_COMPLETE;
skb->csum = csum_unfold((__force __sum16)cqe->check_sum);
skb_record_rx_queue(skb, rq->ix);
if (likely(netdev->features & NETIF_F_RXHASH))
mlx5e_skb_set_hash(cqe, skb);
skb_reset_mac_header(skb);
skb_pull(skb, MLX5_IPOIB_ENCAP_LEN);
skb->dev = netdev;
rq->stats.csum_complete++;
rq->stats.packets++;
rq->stats.bytes += cqe_bcnt;
}
void mlx5i_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
{
struct mlx5e_rx_wqe *wqe;
__be16 wqe_counter_be;
struct sk_buff *skb;
u16 wqe_counter;
u32 cqe_bcnt;
wqe_counter_be = cqe->wqe_counter;
wqe_counter = be16_to_cpu(wqe_counter_be);
wqe = mlx5_wq_ll_get_wqe(&rq->wq, wqe_counter);
cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
skb = skb_from_cqe(rq, cqe, wqe_counter, cqe_bcnt);
if (!skb)
goto wq_ll_pop;
mlx5i_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
napi_gro_receive(rq->cq.napi, skb);
wq_ll_pop:
mlx5_wq_ll_pop(&rq->wq, wqe_counter_be,
&wqe->next.next_wqe_index);
}
#endif /* CONFIG_MLX5_CORE_IPOIB */

2
drivers/net/ethernet/mellanox/mlx5/core/ipoib.c
View File

@ -282,6 +282,8 @@ static const struct mlx5e_profile mlx5i_nic_profile = {
.disable = NULL, /* mlx5i_disable */
.update_stats = NULL, /* mlx5i_update_stats */
.max_nch = mlx5e_get_max_num_channels,
.rx_handlers.handle_rx_cqe = mlx5i_handle_rx_cqe,
.rx_handlers.handle_rx_cqe_mpwqe = NULL, /* Not supported */
.max_tc = MLX5I_MAX_NUM_TC,
};

1
drivers/net/ethernet/mellanox/mlx5/core/ipoib.h
View File

@ -49,5 +49,6 @@ struct mlx5i_priv {
netdev_tx_t mlx5i_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
struct mlx5_av *av, u32 dqpn, u32 dqkey);
void mlx5i_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe);
#endif /* __MLX5E_IPOB_H__ */