netdev - Re: [PATCH for-next 1/3] net/ice: add support for DSCP QoS for IIDC

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Message-ID: <YfjvxwcoBKTRe1co@unreal>
Date:   Tue, 1 Feb 2022 10:31:03 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Shiraz Saleem <shiraz.saleem@...el.com>
Cc:     linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
        Dave Ertman <david.m.ertman@...el.com>
Subject: Re: [PATCH for-next 1/3] net/ice: add support for DSCP QoS for IIDC

On Mon, Jan 31, 2022 at 01:43:14PM -0600, Shiraz Saleem wrote:
> From: Dave Ertman <david.m.ertman@...el.com>
> 
> The ice driver provides QoS information to auxiliary drivers through
> the exported function ice_get_qos_params. This function doesn't
> currently support L3 DSCP QoS.
> 
> Add the necessary defines, structure elements and code to support DSCP
> QoS through the IIDC functions.
> 
> Signed-off-by: Dave Ertman <david.m.ertman@...el.com>
> Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
> Signed-off-by: Shiraz Saleem <shiraz.saleem@...el.com>
> ---
>  drivers/net/ethernet/intel/ice/ice_idc.c | 5 +++++
>  include/linux/net/intel/iidc.h           | 5 +++++
>  2 files changed, 10 insertions(+)
> 
> diff --git a/drivers/net/ethernet/intel/ice/ice_idc.c b/drivers/net/ethernet/intel/ice/ice_idc.c
> index fc35801..263a2e7 100644
> --- a/drivers/net/ethernet/intel/ice/ice_idc.c
> +++ b/drivers/net/ethernet/intel/ice/ice_idc.c
> @@ -227,6 +227,11 @@ void ice_get_qos_params(struct ice_pf *pf, struct iidc_qos_params *qos)
>  
>  	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
>  		qos->tc_info[i].rel_bw = dcbx_cfg->etscfg.tcbwtable[i];
> +
> +	qos->pfc_mode = dcbx_cfg->pfc_mode;
> +	if (qos->pfc_mode == IIDC_DSCP_PFC_MODE)
> +		for (i = 0; i < IIDC_MAX_DSCP_MAPPING; i++)
> +			qos->dscp_map[i] = dcbx_cfg->dscp_map[i];
>  }
>  EXPORT_SYMBOL_GPL(ice_get_qos_params);
>  
> diff --git a/include/linux/net/intel/iidc.h b/include/linux/net/intel/iidc.h
> index 1289593..fee9180 100644
> --- a/include/linux/net/intel/iidc.h
> +++ b/include/linux/net/intel/iidc.h
> @@ -32,6 +32,9 @@ enum iidc_rdma_protocol {
>  };
>  
>  #define IIDC_MAX_USER_PRIORITY		8
> +#define IIDC_MAX_DSCP_MAPPING          64
> +#define IIDC_VLAN_PFC_MODE             0x0

This define is not used in any of the patches in the series.

Thanks

> +#define IIDC_DSCP_PFC_MODE             0x1
>  
>  /* Struct to hold per RDMA Qset info */
>  struct iidc_rdma_qset_params {
> @@ -60,6 +63,8 @@ struct iidc_qos_params {
>  	u8 vport_relative_bw;
>  	u8 vport_priority_type;
>  	u8 num_tc;
> +	u8 pfc_mode;
> +	u8 dscp_map[IIDC_MAX_DSCP_MAPPING];
>  };
>  
>  struct iidc_event {
> -- 
> 1.8.3.1
>