Reviewed-by: Xueming Li <xuemi...@mellanox.com>
> -----Original Message-----
> From: dev <dev-boun...@dpdk.org> On Behalf Of Adrien Mazarguil
> Sent: Thursday, June 14, 2018 4:35 PM
> To: Shahaf Shuler <shah...@mellanox.com>
> Cc: dev@dpdk.org
> Subject: [dpdk-dev] [PATCH v2 7/7] net/mlx5: add parameter for port
> representors
>
> Prior to this patch, all port representors detected on a given device were
> probed and Ethernet devices
> instantiated for each of them.
>
> This patch adds support for the standard "representor" parameter, which
> implies that port representors
> are not probed by default anymore, except for the list provided through
> device arguments.
>
> (Patch based on prior work from Yuanhan Liu)
>
> Signed-off-by: Adrien Mazarguil <adrien.mazarg...@6wind.com>
> --
> v2 changes:
>
> - Added error message for when rte_eth_devargs_parse() fails.
> ---
> doc/guides/nics/mlx5.rst | 12 ++++++++++++
> doc/guides/prog_guide/poll_mode_drv.rst | 2 ++
> drivers/net/mlx5/mlx5.c | 29 ++++++++++++++++++++++++++++
> 3 files changed, 43 insertions(+)
>
> diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst index
> 79c982e29..5229e546c 100644
> --- a/doc/guides/nics/mlx5.rst
> +++ b/doc/guides/nics/mlx5.rst
> @@ -388,6 +388,18 @@ Run-time configuration
>
> Disabled by default.
>
> +- ``representor`` parameter [list]
> +
> + This parameter can be used to instantiate DPDK Ethernet devices from
> + existing port (or VF) representors configured on the device.
> +
> + It is a standard parameter whose format is described in
> + :ref:`ethernet_device_standard_device_arguments`.
> +
> + For instance, to probe port representors 0 through 2::
> +
> + representor=[0-2]
> +
> Firmware configuration
> ~~~~~~~~~~~~~~~~~~~~~~
>
> diff --git a/doc/guides/prog_guide/poll_mode_drv.rst
> b/doc/guides/prog_guide/poll_mode_drv.rst
> index af82352a0..58d49ba0f 100644
> --- a/doc/guides/prog_guide/poll_mode_drv.rst
> +++ b/doc/guides/prog_guide/poll_mode_drv.rst
> @@ -365,6 +365,8 @@ Ethernet Device API
>
> The Ethernet device API exported by the Ethernet PMDs is described in the
> *DPDK API Reference*.
>
> +.. _ethernet_device_standard_device_arguments:
> +
> Ethernet Device Standard Device Arguments
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c index
> 716c9d9a5..26e61d99d 100644
> --- a/drivers/net/mlx5/mlx5.c
> +++ b/drivers/net/mlx5/mlx5.c
> @@ -91,6 +91,9 @@
> /* Activate Netlink support in VF mode. */ #define MLX5_VF_NL_EN "vf_nl_en"
>
> +/* Select port representors to instantiate. */ #define MLX5_REPRESENTOR
> +"representor"
> +
> #ifndef HAVE_IBV_MLX5_MOD_MPW
> #define MLX5DV_CONTEXT_FLAGS_MPW_ALLOWED (1 << 2) #define
> MLX5DV_CONTEXT_FLAGS_ENHANCED_MPW (1 << 3)
> @@ -423,6 +426,9 @@ mlx5_args_check(const char *key, const char *val, void
> *opaque)
> struct mlx5_dev_config *config = opaque;
> unsigned long tmp;
>
> + /* No-op, port representors are processed in mlx5_dev_spawn(). */
> + if (!strcmp(MLX5_REPRESENTOR, key))
> + return 0;
> errno = 0;
> tmp = strtoul(val, NULL, 0);
> if (errno) {
> @@ -495,6 +501,7 @@ mlx5_args(struct mlx5_dev_config *config, struct
> rte_devargs *devargs)
> MLX5_RX_VEC_EN,
> MLX5_L3_VXLAN_EN,
> MLX5_VF_NL_EN,
> + MLX5_REPRESENTOR,
> NULL,
> };
> struct rte_kvargs *kvlist;
> @@ -1173,13 +1180,34 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev,
> struct rte_eth_dev **eth_list = NULL;
> struct ibv_context *ctx;
> struct ibv_device_attr_ex attr;
> + struct rte_eth_devargs eth_da;
> void *tmp;
> unsigned int i;
> unsigned int j = 0;
> unsigned int n = 0;
> int ret;
>
> + if (dpdk_dev->devargs) {
> + ret = rte_eth_devargs_parse(dpdk_dev->devargs->args, ð_da);
> + if (ret) {
> + rte_errno = -ret;
> + DRV_LOG(ERR, "failed to process device arguments: %s",
> + strerror(rte_errno));
> + goto error;
> + }
> + } else {
> + memset(ð_da, 0, sizeof(eth_da));
> + }
> next:
> + if (j) {
> + unsigned int k;
> +
> + for (k = 0; k < eth_da.nb_representor_ports; ++k)
> + if (eth_da.representor_ports[k] == j - 1)
> + break;
> + if (k == eth_da.nb_representor_ports)
> + goto skip;
> + }
> errno = 0;
> ctx = mlx5_glue->open_device(ibv_dev[j]);
> if (!ctx) {
> @@ -1218,6 +1246,7 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev,
> goto error;
> ++n;
> }
> +skip:
> if (ibv_dev[++j])
> goto next;
> eth_list[n] = NULL;
> --
> 2.11.0
