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net/mlx5: set maximum LRO packet size

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This patch implements use of the API for LRO aggregated packet
max size.
Rx queue create is updated to use the relevant configuration.
Documentation is updated accordingly.

Signed-off-by: Dekel Peled <dekelp@mellanox.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
Acked-by: Matan Azrad <matan@mellanox.com>
This commit is contained in:
Dekel Peled 2019-11-11 19:47:34 +02:00 committed by Ferruh Yigit
parent dc258e4ab9
commit 1c7e57f9bd
4 changed files with 9 additions and 2 deletions
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2
doc/guides/nics/mlx5.rst
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@ -207,6 +207,8 @@ Limitations
- KEEP_CRC offload cannot be supported with LRO.
- The first mbuf length, without head-room, must be big enough to include the
TCP header (122B).
- Rx queue with LRO offload enabled, receiving a non-LRO packet, can forward
it with size limited to max LRO size, not to max RX packet length.
Statistics
----------

3
drivers/net/mlx5/mlx5.h
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@ -218,6 +218,9 @@ TAILQ_HEAD(mlx5_flows, rte_flow);
#define MLX5_LRO_SUPPORTED(dev) \
(((struct mlx5_priv *)((dev)->data->dev_private))->config.lro.supported)
/* Maximal size of aggregated LRO packet. */
#define MLX5_MAX_LRO_SIZE (UINT8_MAX * 256u)
/* LRO configurations structure. */
struct mlx5_lro_config {
uint32_t supported:1; /* Whether LRO is supported. */

1
drivers/net/mlx5/mlx5_ethdev.c
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@ -609,6 +609,7 @@ mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
/* FIXME: we should ask the device for these values. */
info->min_rx_bufsize = 32;
info->max_rx_pktlen = 65536;
info->max_lro_pkt_size = MLX5_MAX_LRO_SIZE;
/*
* Since we need one CQ per QP, the limit is the minimum number
* between the two values.

5
drivers/net/mlx5/mlx5_rxq.c
View File

@ -1702,7 +1702,6 @@ mlx5_mprq_alloc_mp(struct rte_eth_dev *dev)
return 0;
}
#define MLX5_MAX_LRO_SIZE (UINT8_MAX * 256u)
#define MLX5_MAX_TCP_HDR_OFFSET ((unsigned int)(sizeof(struct rte_ether_hdr) + \
sizeof(struct rte_vlan_hdr) * 2 + \
sizeof(struct rte_ipv6_hdr)))
@ -1774,7 +1773,9 @@ mlx5_rxq_new(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
dev->data->dev_conf.rxmode.offloads;
unsigned int lro_on_queue = !!(offloads & DEV_RX_OFFLOAD_TCP_LRO);
const int mprq_en = mlx5_check_mprq_support(dev) > 0;
unsigned int max_rx_pkt_len = dev->data->dev_conf.rxmode.max_rx_pkt_len;
unsigned int max_rx_pkt_len = lro_on_queue ?
dev->data->dev_conf.rxmode.max_lro_pkt_size :
dev->data->dev_conf.rxmode.max_rx_pkt_len;
unsigned int non_scatter_min_mbuf_size = max_rx_pkt_len +
RTE_PKTMBUF_HEADROOM;
unsigned int max_lro_size = 0;