From aaf34de5d801d44b983dbe97c10d1cd8a5bcca01 Mon Sep 17 00:00:00 2001 From: Viacheslav Ovsiienko Date: Fri, 13 Nov 2020 15:32:52 +0000 Subject: [PATCH] net/mlx5: add wire vport hint The kernel can use two approaches to distinguish the E-Switch source vport in the packet metadata - either with dedicated source_port field or register C0. To eliminate the extra source vport matching in the hardware the source_port field can be set to specific values (0xFFFF) for the wire source port. This match can be applied to recognize wire port only in FDB domain. Missing the register C0 match in the NIC Rx domain causes incorrect representor steering within shared IB device ports and must be always specified (if kernel uses this approach). Signed-off-by: Viacheslav Ovsiienko --- drivers/net/mlx5/mlx5_flow_dv.c | 39 ++++++++++++++++++++++++--------- 1 file changed, 29 insertions(+), 10 deletions(-) diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c index 5e230a3c25..3d69957da7 100644 --- a/drivers/net/mlx5/mlx5_flow_dv.c +++ b/drivers/net/mlx5/mlx5_flow_dv.c @@ -7596,13 +7596,16 @@ flow_dv_translate_item_source_vport(void *matcher, void *key, * Flow matcher value. * @param[in] item * Flow pattern to translate. + * @param[in] + * Flow attributes. * * @return * 0 on success, a negative errno value otherwise. */ static int flow_dv_translate_item_port_id(struct rte_eth_dev *dev, void *matcher, - void *key, const struct rte_flow_item *item) + void *key, const struct rte_flow_item *item, + const struct rte_flow_attr *attr) { const struct rte_flow_item_port_id *pid_m = item ? item->mask : NULL; const struct rte_flow_item_port_id *pid_v = item ? item->spec : NULL; @@ -7614,14 +7617,30 @@ flow_dv_translate_item_port_id(struct rte_eth_dev *dev, void *matcher, priv = mlx5_port_to_eswitch_info(id, item == NULL); if (!priv) return -rte_errno; - /* Translate to vport field or to metadata, depending on mode. */ - if (priv->vport_meta_mask) - flow_dv_translate_item_meta_vport(matcher, key, - priv->vport_meta_tag, - priv->vport_meta_mask); - else + /* + * Translate to vport field or to metadata, depending on mode. + * Kernel can use either misc.source_port or half of C0 metadata + * register. + */ + if (priv->vport_meta_mask) { + /* + * Provide the hint for SW steering library + * to insert the flow into ingress domain and + * save the extra vport match. + */ + if (mask == 0xffff && priv->vport_id == 0xffff && + priv->pf_bond < 0 && attr->transfer) + flow_dv_translate_item_source_vport + (matcher, key, priv->vport_id, mask); + else + flow_dv_translate_item_meta_vport + (matcher, key, + priv->vport_meta_tag, + priv->vport_meta_mask); + } else { flow_dv_translate_item_source_vport(matcher, key, priv->vport_id, mask); + } return 0; } @@ -10224,8 +10243,8 @@ flow_dv_translate(struct rte_eth_dev *dev, NULL, "item not supported"); switch (item_type) { case RTE_FLOW_ITEM_TYPE_PORT_ID: - flow_dv_translate_item_port_id(dev, match_mask, - match_value, items); + flow_dv_translate_item_port_id + (dev, match_mask, match_value, items, attr); last_item = MLX5_FLOW_ITEM_PORT_ID; break; case RTE_FLOW_ITEM_TYPE_ETH: @@ -10451,7 +10470,7 @@ flow_dv_translate(struct rte_eth_dev *dev, if (!(item_flags & MLX5_FLOW_ITEM_PORT_ID) && (priv->representor || priv->master)) { if (flow_dv_translate_item_port_id(dev, match_mask, - match_value, NULL)) + match_value, NULL, attr)) return -rte_errno; } #ifdef RTE_LIBRTE_MLX5_DEBUG -- 2.20.1