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net/mlx5e: IPoIB, Xmit flow

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Implement mlx5e's IPoIB SKB transmit using the helper functions provided
by mlx5e ethernet tx flow, the only difference in the code between
mlx5e_xmit and mlx5i_xmit is that IPoIB has some extra fields to fill
(UD datagram segment) in the TX descriptor (WQE) and it doesn't need to
have any vlan handling.

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 06:37:02 +03:00 committed by David S. Miller
parent 77bdf8950b
commit 258545449b
5 changed files with 110 additions and 10 deletions
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10
drivers/infiniband/hw/mlx5/mlx5_ib.h
View file

@ -729,16 +729,6 @@ static inline struct mlx5_ib_mw *to_mmw(struct ib_mw *ibmw)
return container_of(ibmw, struct mlx5_ib_mw, ibmw);
}
struct mlx5_ib_ah {
struct ib_ah ibah;
struct mlx5_av av;
};
static inline struct mlx5_ib_ah *to_mah(struct ib_ah *ibah)
{
return container_of(ibah, struct mlx5_ib_ah, ibah);
}
int mlx5_ib_db_map_user(struct mlx5_ib_ucontext *context, unsigned long virt,
struct mlx5_db *db);
void mlx5_ib_db_unmap_user(struct mlx5_ib_ucontext *context, struct mlx5_db *db);

87
drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
View file

@ -503,3 +503,90 @@ void mlx5e_free_txqsq_descs(struct mlx5e_txqsq *sq)
sq->cc += wi->num_wqebbs;
}
}
#ifdef CONFIG_MLX5_CORE_IPOIB
struct mlx5_wqe_eth_pad {
u8 rsvd0[16];
};
struct mlx5i_tx_wqe {
struct mlx5_wqe_ctrl_seg ctrl;
struct mlx5_wqe_datagram_seg datagram;
struct mlx5_wqe_eth_pad pad;
struct mlx5_wqe_eth_seg eth;
};
static inline void
mlx5i_txwqe_build_datagram(struct mlx5_av *av, u32 dqpn, u32 dqkey,
struct mlx5_wqe_datagram_seg *dseg)
{
memcpy(&dseg->av, av, sizeof(struct mlx5_av));
dseg->av.dqp_dct = cpu_to_be32(dqpn | MLX5_EXTENDED_UD_AV);
dseg->av.key.qkey.qkey = cpu_to_be32(dqkey);
}
netdev_tx_t mlx5i_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
struct mlx5_av *av, u32 dqpn, u32 dqkey)
{
struct mlx5_wq_cyc *wq = &sq->wq;
u16 pi = sq->pc & wq->sz_m1;
struct mlx5i_tx_wqe *wqe = mlx5_wq_cyc_get_wqe(wq, pi);
struct mlx5e_tx_wqe_info *wi = &sq->db.wqe_info[pi];
struct mlx5_wqe_ctrl_seg *cseg = &wqe->ctrl;
struct mlx5_wqe_datagram_seg *datagram = &wqe->datagram;
struct mlx5_wqe_eth_seg *eseg = &wqe->eth;
unsigned char *skb_data = skb->data;
unsigned int skb_len = skb->len;
u8 opcode = MLX5_OPCODE_SEND;
unsigned int num_bytes;
int num_dma;
u16 headlen;
u16 ds_cnt;
u16 ihs;
memset(wqe, 0, sizeof(*wqe));
mlx5i_txwqe_build_datagram(av, dqpn, dqkey, datagram);
mlx5e_txwqe_build_eseg_csum(sq, skb, eseg);
if (skb_is_gso(skb)) {
opcode = MLX5_OPCODE_LSO;
ihs = mlx5e_txwqe_build_eseg_gso(sq, skb, eseg, &num_bytes);
} else {
ihs = mlx5e_calc_min_inline(sq->min_inline_mode, skb);
num_bytes = max_t(unsigned int, skb->len, ETH_ZLEN);
}
ds_cnt = sizeof(*wqe) / MLX5_SEND_WQE_DS;
if (ihs) {
memcpy(eseg->inline_hdr.start, skb_data, ihs);
mlx5e_tx_skb_pull_inline(&skb_data, &skb_len, ihs);
eseg->inline_hdr.sz = cpu_to_be16(ihs);
ds_cnt += DIV_ROUND_UP(ihs - sizeof(eseg->inline_hdr.start), MLX5_SEND_WQE_DS);
}
headlen = skb_len - skb->data_len;
num_dma = mlx5e_txwqe_build_dsegs(sq, skb, skb_data, headlen,
(struct mlx5_wqe_data_seg *)cseg + ds_cnt);
if (unlikely(num_dma < 0))
goto dma_unmap_wqe_err;
mlx5e_txwqe_complete(sq, skb, opcode, ds_cnt + num_dma,
num_bytes, num_dma, wi, cseg);
return NETDEV_TX_OK;
dma_unmap_wqe_err:
sq->stats.dropped++;
mlx5e_dma_unmap_wqe_err(sq, wi->num_dma);
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
#endif

10
drivers/net/ethernet/mellanox/mlx5/core/ipoib.c
View file

@ -393,6 +393,16 @@ int mlx5i_detach_mcast(struct net_device *netdev, struct ib_device *hca,
return err;
}
int mlx5i_xmit(struct net_device *dev, struct sk_buff *skb,
struct ib_ah *address, u32 dqpn, u32 dqkey)
{
struct mlx5e_priv *epriv = mlx5i_epriv(dev);
struct mlx5e_txqsq *sq = epriv->txq2sq[skb_get_queue_mapping(skb)];
struct mlx5_ib_ah *mah = to_mah(address);
return mlx5i_sq_xmit(sq, skb, &mah->av, dqpn, dqkey);
}
static int mlx5i_check_required_hca_cap(struct mlx5_core_dev *mdev)
{
if (MLX5_CAP_GEN(mdev, port_type) != MLX5_CAP_PORT_TYPE_IB)

3
drivers/net/ethernet/mellanox/mlx5/core/ipoib.h
View file

@ -47,4 +47,7 @@ struct mlx5i_priv {
/* Extract mlx5e_priv from IPoIB netdev */
#define mlx5i_epriv(netdev) ((void *)(((struct mlx5i_priv *)netdev_priv(netdev))->mlx5e_priv))
netdev_tx_t mlx5i_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
struct mlx5_av *av, u32 dqpn, u32 dqkey);
#endif /* __MLX5E_IPOB_H__ */

10
include/linux/mlx5/qp.h
View file

@ -295,6 +295,16 @@ struct mlx5_av {
u8 rgid[16];
};
struct mlx5_ib_ah {
struct ib_ah ibah;
struct mlx5_av av;
};
static inline struct mlx5_ib_ah *to_mah(struct ib_ah *ibah)
{
return container_of(ibah, struct mlx5_ib_ah, ibah);
}
struct mlx5_wqe_datagram_seg {
struct mlx5_av av;
};