[dpdk-dev] [FDIO] dpdk: add devargs support

[Ananyev, Konstantin]

> From: Chenmin Sun <chenmin.sun at intel.com>
> 
> Type: feature
> 
> This patch adds the devargs support for dpdk device
> The devargs are used as hardware-specific init args for dpdk devices
> please refer to the nic guides under
> $(DPDK_DIR)/doc/guides/nics/$(NIC_DRIVER).rst
> 
> Signed-off-by: Chenmin Sun <chenmin.sun at intel.com>
> Change-Id: Id380d04720090bb66afe5ce09d664e5e248b8eb9


Isn't it patch for vpp?
If so wrong mailing list 😊

> ---
>  src/plugins/dpdk/device/dpdk.h   |  2 ++
>  src/plugins/dpdk/device/format.c |  3 +++
>  src/plugins/dpdk/device/init.c   | 36 +++++++++++++++++++++-----------
>  src/vpp/conf/startup.conf        |  5 +++++
>  4 files changed, 34 insertions(+), 12 deletions(-)
> 
> diff --git a/src/plugins/dpdk/device/dpdk.h b/src/plugins/dpdk/device/dpdk.h
> index d58d2daa7..ab28ac06a 100644
> --- a/src/plugins/dpdk/device/dpdk.h
> +++ b/src/plugins/dpdk/device/dpdk.h
> @@ -336,6 +336,8 @@ typedef struct
>    u32 hqos_enabled;
>    dpdk_device_config_hqos_t hqos;
>    u8 tso;
> +  u8 *devargs;
> +
>  #define DPDK_DEVICE_TSO_DEFAULT 0
>  #define DPDK_DEVICE_TSO_OFF 1
>  #define DPDK_DEVICE_TSO_ON  2
> diff --git a/src/plugins/dpdk/device/format.c b/src/plugins/dpdk/device/format.c
> index 292c083fc..20493eb77 100644
> --- a/src/plugins/dpdk/device/format.c
> +++ b/src/plugins/dpdk/device/format.c
> @@ -564,6 +564,9 @@ format_dpdk_device (u8 * s, va_list * args)
>  	      format_white_space, indent + 2, format_dpdk_link_status, xd);
>    s = format (s, "%Uflags: %U\n",
>  	      format_white_space, indent + 2, format_dpdk_device_flags, xd);
> +  if (di.device->devargs && di.device->devargs->args)
> +    s = format (s, "%UDevargs: %s\n",
> +		format_white_space, indent + 2, di.device->devargs->args);
>    s = format (s, "%Urx: queues %d (max %d), desc %d "
>  	      "(min %d max %d align %d)\n",
>  	      format_white_space, indent + 2, xd->rx_q_used, di.max_rx_queues,
> diff --git a/src/plugins/dpdk/device/init.c b/src/plugins/dpdk/device/init.c
> index 5a6262c30..d0125e939 100644
> --- a/src/plugins/dpdk/device/init.c
> +++ b/src/plugins/dpdk/device/init.c
> @@ -1118,6 +1118,8 @@ dpdk_device_config (dpdk_config_main_t * conf, vlib_pci_addr_t pci_addr,
>  	{
>  	  devconf->tso = DPDK_DEVICE_TSO_OFF;
>  	}
> +      else if (unformat (input, "devargs %s", &devconf->devargs))
> +	;
>        else
>  	{
>  	  error = clib_error_return (0, "unknown input `%U'",
> @@ -1428,21 +1430,31 @@ dpdk_config (vlib_main_t * vm, unformat_input_t * input)
>  	/* copy tso config from default device */
>  	_(tso)
> 
> +	/* copy tso config from default device */
> +	_(devargs)
> +
>      /* add DPDK EAL whitelist/blacklist entry */
>      if (num_whitelisted > 0 && devconf->is_blacklisted == 0)
> -      {
> -	tmp = format (0, "-w%c", 0);
> -	vec_add1 (conf->eal_init_args, tmp);
> -	tmp = format (0, "%U%c", format_vlib_pci_addr, &devconf->pci_addr, 0);
> -	vec_add1 (conf->eal_init_args, tmp);
> -      }
> +    {
> +	  tmp = format (0, "-w%c", 0);
> +	  vec_add1 (conf->eal_init_args, tmp);
> +	  if (devconf->devargs)
> +	  {
> +	    tmp = format (0, "%U,%s", format_vlib_pci_addr, &devconf->pci_addr, devconf->devargs, 0);
> +	  }
> +	  else
> +	  {
> +	    tmp = format (0, "%U%c", format_vlib_pci_addr, &devconf->pci_addr, 0);
> +	  }
> +	  vec_add1 (conf->eal_init_args, tmp);
> +    }
>      else if (num_whitelisted == 0 && devconf->is_blacklisted != 0)
> -      {
> -	tmp = format (0, "-b%c", 0);
> -	vec_add1 (conf->eal_init_args, tmp);
> -	tmp = format (0, "%U%c", format_vlib_pci_addr, &devconf->pci_addr, 0);
> -	vec_add1 (conf->eal_init_args, tmp);
> -      }
> +    {
> +	  tmp = format (0, "-b%c", 0);
> +	  vec_add1 (conf->eal_init_args, tmp);
> +	  tmp = format (0, "%U%c", format_vlib_pci_addr, &devconf->pci_addr, 0);
> +	  vec_add1 (conf->eal_init_args, tmp);
> +    }
>    }));
>    /* *INDENT-ON* */
> 
> diff --git a/src/vpp/conf/startup.conf b/src/vpp/conf/startup.conf
> index 3d83a1336..b0d0c8664 100644
> --- a/src/vpp/conf/startup.conf
> +++ b/src/vpp/conf/startup.conf
> @@ -105,6 +105,11 @@ cpu {
>  		## Default is off
>  		## To enable TSO, 'enable-tcp-udp-checksum' must be set
>  		# tso on
> +
> +		## Devargs
> +                ## device specific init args
> +                ## Default is NULL
> +		# devargs safe-mode-support=1,pipeline-mode-support=1
>  	# }
> 
>  	## Whitelist specific interface by specifying PCI address
> --
> 2.17.1