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Date: Thu, 13 Apr 2017 06:37:04 +0300
From: Saeed Mahameed <saeedm@...lanox.com>
To: "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Cc: linux-rdma@...r.kernel.org, Doug Ledford <dledford@...hat.com>,
Leon Romanovsky <leonro@...lanox.com>,
Erez Shitrit <erezsh@...lanox.com>,
Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
Vishwanathapura Niranjana <niranjana.vishwanathapura@...el.com>,
Saeed Mahameed <saeedm@...lanox.com>
Subject: [PATCH net-next 14/16] net/mlx5e: IPoIB, RX handler
Implement IPoIB RX SKB handler.
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
Reviewed-by: Erez Shitrit <erezsh@...lanox.com>
---
drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 78 +++++++++++++++++++++++++
drivers/net/ethernet/mellanox/mlx5/core/ipoib.c | 2 +
drivers/net/ethernet/mellanox/mlx5/core/ipoib.h | 1 +
3 files changed, 81 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
index 1a9532b31635..43308243f519 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
@@ -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 */
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/ipoib.c b/drivers/net/ethernet/mellanox/mlx5/core/ipoib.c
index c468aaedf0a6..001d2953cb6d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/ipoib.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/ipoib.c
@@ -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,
};
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/ipoib.h b/drivers/net/ethernet/mellanox/mlx5/core/ipoib.h
index 89bca182464c..bae0a5cbc8ad 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/ipoib.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/ipoib.h
@@ -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__ */
--
2.11.0
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