netdev - Re: [PATCH net-next 01/15] net/mlx5: Refactor QoS group scheduling element creation

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Message-ID: <eb8df6f1-7b16-4682-b6ef-06a5df133eb0@gmail.com>
Date: Mon, 14 Oct 2024 23:34:59 +0300
From: Tariq Toukan <ttoukan.linux@...il.com>
To: Daniel Machon <daniel.machon@...rochip.com>,
 Tariq Toukan <tariqt@...dia.com>
Cc: "David S. Miller" <davem@...emloft.net>, Jakub Kicinski
 <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Eric Dumazet <edumazet@...gle.com>, netdev@...r.kernel.org,
 Saeed Mahameed <saeedm@...dia.com>, Gal Pressman <gal@...dia.com>,
 Leon Romanovsky <leonro@...dia.com>, cjubran@...dia.com, cratiu@...dia.com
Subject: Re: [PATCH net-next 01/15] net/mlx5: Refactor QoS group scheduling
 element creation



On 14/10/2024 11:54, Daniel Machon wrote:
> Hi,
> 
>> From: Carolina Jubran <cjubran@...dia.com>
>>
>> Introduce `esw_qos_create_group_sched_elem` to handle the creation of
>> group scheduling elements for E-Switch QoS, Transmit Scheduling
>> Arbiter (TSAR).
>>
>> This reduces duplication and simplifies code for TSAR setup.
>>
>> Signed-off-by: Carolina Jubran <cjubran@...dia.com>
>> Reviewed-by: Cosmin Ratiu <cratiu@...dia.com>
>> Signed-off-by: Tariq Toukan <tariqt@...dia.com>
>> ---

...

>> @@ -496,21 +523,10 @@ static void __esw_qos_free_rate_group(struct mlx5_esw_rate_group *group)
>>   static struct mlx5_esw_rate_group *
>>   __esw_qos_create_rate_group(struct mlx5_eswitch *esw, struct netlink_ext_ack *extack)
>>   {
>> -       u32 tsar_ctx[MLX5_ST_SZ_DW(scheduling_context)] = {};
>>          struct mlx5_esw_rate_group *group;
>> -       int tsar_ix, err;
>> -       void *attr;
>> +       u32 tsar_ix, err;
>>
>> -       MLX5_SET(scheduling_context, tsar_ctx, element_type,
>> -                SCHEDULING_CONTEXT_ELEMENT_TYPE_TSAR);
>> -       MLX5_SET(scheduling_context, tsar_ctx, parent_element_id,
>> -                esw->qos.root_tsar_ix);
>> -       attr = MLX5_ADDR_OF(scheduling_context, tsar_ctx, element_attributes);
>> -       MLX5_SET(tsar_element, attr, tsar_type, TSAR_ELEMENT_TSAR_TYPE_DWRR);
>> -       err = mlx5_create_scheduling_element_cmd(esw->dev,
>> -                                                SCHEDULING_HIERARCHY_E_SWITCH,
>> -                                                tsar_ctx,
>> -                                                &tsar_ix);
>> +       err = esw_qos_create_group_sched_elem(esw->dev, esw->qos.root_tsar_ix, &tsar_ix);
> 
> 'err' is now u32 and esw_qos_create_group_sched_elem returns an int -
> is this intentional? the error check should still work though.
> 

will fix.

> 
>>          if (err) {
>>                  NL_SET_ERR_MSG_MOD(extack, "E-Switch create TSAR for group failed");
>>                  return ERR_PTR(err);
>> @@ -591,32 +607,13 @@ static int __esw_qos_destroy_rate_group(struct mlx5_esw_rate_group *group,
>>
>>   static int esw_qos_create(struct mlx5_eswitch *esw, struct netlink_ext_ack *extack)
>>   {
>> -       u32 tsar_ctx[MLX5_ST_SZ_DW(scheduling_context)] = {};
>>          struct mlx5_core_dev *dev = esw->dev;
>> -       void *attr;
>>          int err;
>>
>>          if (!MLX5_CAP_GEN(dev, qos) || !MLX5_CAP_QOS(dev, esw_scheduling))
>>                  return -EOPNOTSUPP;
>>
>> -       if (!mlx5_qos_element_type_supported(dev,
>> -                                            SCHEDULING_CONTEXT_ELEMENT_TYPE_TSAR,
>> -                                            SCHEDULING_HIERARCHY_E_SWITCH) ||
>> -           !mlx5_qos_tsar_type_supported(dev,
>> -                                         TSAR_ELEMENT_TSAR_TYPE_DWRR,
>> -                                         SCHEDULING_HIERARCHY_E_SWITCH))
>> -               return -EOPNOTSUPP;
>> -
>> -       MLX5_SET(scheduling_context, tsar_ctx, element_type,
>> -                SCHEDULING_CONTEXT_ELEMENT_TYPE_TSAR);
>> -
>> -       attr = MLX5_ADDR_OF(scheduling_context, tsar_ctx, element_attributes);
>> -       MLX5_SET(tsar_element, attr, tsar_type, TSAR_ELEMENT_TSAR_TYPE_DWRR);
>> -
>> -       err = mlx5_create_scheduling_element_cmd(dev,
>> -                                                SCHEDULING_HIERARCHY_E_SWITCH,
>> -                                                tsar_ctx,
>> -                                                &esw->qos.root_tsar_ix);
>> +       err = esw_qos_create_group_sched_elem(esw->dev, 0, &esw->qos.root_tsar_ix);
> 
> Same here.

err is int here.

> 
>>          if (err) {
>>                  esw_warn(dev, "E-Switch create root TSAR failed (%d)\n", err);
>>                  return err;
>> --
>> 2.44.0
>>
>>
> 

Thanks for your comments.