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Setup mbuf hash type properly when receiving IP packets in the mlx4en(4) driver.

Browse Source 
Submitted by:		sephe@
Differential Revision:	https://reviews.freebsd.org/D12229
MFC after:		1 week
Sponsored by:		Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2017-10-02 12:11:43 +00:00
parent 29d6b8abb4
commit 62afbce910
1 changed files with 47 additions and 1 deletions
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48
sys/dev/mlx4/mlx4_en/mlx4_en_rx.c
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@ -555,6 +555,51 @@ mlx4_en_rx_mb(struct mlx4_en_priv *priv, struct mlx4_en_rx_ring *ring,
return (mb);
}
static __inline int
mlx4_en_rss_hash(__be16 status, int udp_rss)
{
const __be16 status_all = cpu_to_be16(
MLX4_CQE_STATUS_IPV4 |
MLX4_CQE_STATUS_IPV4F |
MLX4_CQE_STATUS_IPV6 |
MLX4_CQE_STATUS_TCP |
MLX4_CQE_STATUS_UDP);
const __be16 status_ipv4_tcp = cpu_to_be16(
MLX4_CQE_STATUS_IPV4 |
MLX4_CQE_STATUS_TCP);
const __be16 status_ipv6_tcp = cpu_to_be16(
MLX4_CQE_STATUS_IPV6 |
MLX4_CQE_STATUS_TCP);
const __be16 status_ipv4_udp = cpu_to_be16(
MLX4_CQE_STATUS_IPV4 |
MLX4_CQE_STATUS_UDP);
const __be16 status_ipv6_udp = cpu_to_be16(
MLX4_CQE_STATUS_IPV6 |
MLX4_CQE_STATUS_UDP);
const __be16 status_ipv4 = cpu_to_be16(MLX4_CQE_STATUS_IPV4);
const __be16 status_ipv6 = cpu_to_be16(MLX4_CQE_STATUS_IPV6);
status &= status_all;
switch (status) {
case status_ipv4_tcp:
return (M_HASHTYPE_RSS_TCP_IPV4);
case status_ipv6_tcp:
return (M_HASHTYPE_RSS_TCP_IPV6);
case status_ipv4_udp:
return (udp_rss ? M_HASHTYPE_RSS_UDP_IPV4
: M_HASHTYPE_RSS_IPV4);
case status_ipv6_udp:
return (udp_rss ? M_HASHTYPE_RSS_UDP_IPV6
: M_HASHTYPE_RSS_IPV6);
default:
if (status & status_ipv4)
return (M_HASHTYPE_RSS_IPV4);
if (status & status_ipv6)
return (M_HASHTYPE_RSS_IPV6);
return (M_HASHTYPE_OPAQUE_HASH);
}
}
/* For cpu arch with cache line of 64B the performance is better when cqe size==64B
* To enlarge cqe size from 32B to 64B --> 32B of garbage (i.e. 0xccccccc)
* was added in the beginning of each cqe (the real data is in the corresponding 32B).
@ -578,6 +623,7 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
u32 size_mask = ring->size_mask;
int size = cq->size;
int factor = priv->cqe_factor;
const int udp_rss = priv->mdev->profile.udp_rss;
if (!priv->port_up)
return 0;
@ -625,7 +671,7 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
/* forward Toeplitz compatible hash value */
mb->m_pkthdr.flowid = be32_to_cpu(cqe->immed_rss_invalid);
M_HASHTYPE_SET(mb, M_HASHTYPE_OPAQUE_HASH);
M_HASHTYPE_SET(mb, mlx4_en_rss_hash(cqe->status, udp_rss));
mb->m_pkthdr.rcvif = dev;
if (be32_to_cpu(cqe->vlan_my_qpn) &
MLX4_CQE_VLAN_PRESENT_MASK) {