All Netlink request the PMD will do can also be done by a iproute2 command
line interface, letting the operator configure the VF behavior without
having to modify the application nor reaching PMD limits (e.g. MAC
address number limit).
Signed-off-by: Nelio Laranjeiro <nelio.laranje...@6wind.com>
Acked-by: Adrien Mazarguil <adrien.mazarg...@6wind.com>
---
doc/guides/nics/mlx5.rst | 11 +++++++++++
drivers/net/mlx5/mlx5.c | 9 ++++++++-
drivers/net/mlx5/mlx5.h | 1 +
3 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst
index 46d26e4c8..4c7bf1c56 100644
--- a/doc/guides/nics/mlx5.rst
+++ b/doc/guides/nics/mlx5.rst
@@ -135,6 +135,8 @@ Limitations
- Flows with a VXLAN Network Identifier equal (or ends to be equal)
to 0 are not supported.
- VXLAN TSO and checksum offloads are not supported on VM.
+- VF: flow rules created on VF devices can only match traffic targeted at the
+ configured MAC addresses (see ``rte_eth_dev_mac_addr_add()``).
Statistics
----------
@@ -335,6 +337,15 @@ Run-time configuration
Enabled by default.
+- ``vf_nl_en`` parameter [int]
+
+ A nonzero value enables Netlink requests from the VF to add/remove MAC
+ addresses or/and enable/disable promiscuous/all multicast on the Netdevice.
+ Otherwise the relevant configuration must be run with Linux iproute2 tools.
+ This is a prerequisite to receive this kind of traffic.
+
+ Enabled by default, valid only on VF devices ignored otherwise.
+
Prerequisites
-------------
diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index 5ec152ab1..89bada409 100644
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -69,6 +69,9 @@
/* Device parameter to enable hardware Rx vector. */
#define MLX5_RX_VEC_EN "rx_vec_en"
+/* Activate Netlink support in VF mode. */
+#define MLX5_VF_NL_EN "vf_nl_en"
+
#ifndef HAVE_IBV_MLX5_MOD_MPW
#define MLX5DV_CONTEXT_FLAGS_MPW_ALLOWED (1 << 2)
#define MLX5DV_CONTEXT_FLAGS_ENHANCED_MPW (1 << 3)
@@ -412,6 +415,8 @@ mlx5_args_check(const char *key, const char *val, void
*opaque)
config->tx_vec_en = !!tmp;
} else if (strcmp(MLX5_RX_VEC_EN, key) == 0) {
config->rx_vec_en = !!tmp;
+ } else if (strcmp(MLX5_VF_NL_EN, key) == 0) {
+ config->vf_nl_en = !!tmp;
} else {
DRV_LOG(WARNING, "%s: unknown parameter", key);
rte_errno = EINVAL;
@@ -443,6 +448,7 @@ mlx5_args(struct mlx5_dev_config *config, struct
rte_devargs *devargs)
MLX5_TXQ_MAX_INLINE_LEN,
MLX5_TX_VEC_EN,
MLX5_RX_VEC_EN,
+ MLX5_VF_NL_EN,
NULL,
};
struct rte_kvargs *kvlist;
@@ -748,6 +754,7 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
.txq_inline = MLX5_ARG_UNSET,
.txqs_inline = MLX5_ARG_UNSET,
.inline_max_packet_sz = MLX5_ARG_UNSET,
+ .vf_nl_en = 1,
};
len = snprintf(name, sizeof(name), PCI_PRI_FMT,
@@ -964,7 +971,7 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
/* Register MAC address. */
priv->nl_socket = -1;
priv->nl_sn = 0;
- if (vf) {
+ if (vf && config.vf_nl_en) {
priv->nl_socket = mlx5_nl_init(RTMGRP_LINK);
if (priv->nl_socket < 0)
priv->nl_socket = -1;
diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index 6a7e9f310..7cabf43cc 100644
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -88,6 +88,7 @@ struct mlx5_dev_config {
unsigned int tx_vec_en:1; /* Tx vector is enabled. */
unsigned int rx_vec_en:1; /* Rx vector is enabled. */
unsigned int mpw_hdr_dseg:1; /* Enable DSEGs in the title WQEBB. */
+ unsigned int vf_nl_en:1; /* Enable Netlink requests in VF mode. */
unsigned int tso_max_payload_sz; /* Maximum TCP payload for TSO. */
unsigned int ind_table_max_size; /* Maximum indirection table size. */
int txq_inline; /* Maximum packet size for inlining. */
--
2.11.0
