[Intel-wired-lan] [PATCH net-next v6 4/4] ice: Add txbalancing devlink param

[Wilczynski, Michal]

On 7/21/2022 1:17 AM, Tony Nguyen wrote:
>
>
> On 7/20/2022 7:40 AM, Michal Wilczynski wrote:
>> From: Lukasz Czapnik <lukasz.czapnik at intel.com>
>>
>> It was observed that Tx performance was inconsistent across all queues
>> and/or VSIs and that it was directly connected to existing 9-layer
>> topology of the Tx scheduler.
>>
>> Introduce new private devlink param - txbalance. This paramerer gives 
>> user
>
> s/paramerer/parameter
>
>> flexibility to choose the 5-layer transmit scheduler topology which 
>> helps
>> to smooth out the transmit performance.
>>
>> Allowed parameter values are true for enabled and false for disabled.
>
> Please document these in Documentation/networking/devlink/ice.rst
>
>> Example usage:
>>
>> Show:
>> devlink dev param show pci/0000:4b:00.0 name txbalancing
>> pci/0000:4b:00.0:
>>    name txbalancing type driver-specific
>>      values:
>>        cmode permanent value true
>>
>> Set:
>> devlink dev param set pci/0000:4b:00.0 name txbalancing value true cmode
>> permanent
>>
>> Signed-off-by: Lukasz Czapnik <lukasz.czapnik at intel.com>
>> Signed-off-by: Michal Wilczynski <michal.wilczynski at intel.com>
>
> <snip>
>
>> +/**
>> + * ice_devlink_txbalance_get - Get txbalance parameter
>> + * @devlink: pointer to the devlink instance
>> + * @id: the parameter ID to set
>> + * @ctx: context to store the parameter value
>> + *
>> + * Returns zero on success and negative value on failure.
>> + */
>> +static int ice_devlink_txbalance_get(struct devlink *devlink, u32 id,
>> +                     struct devlink_param_gset_ctx *ctx)
>
> nit: Can you use GNU style on these
>
> static int
> ice_devlink_txbalance_get(...)
>
>
>> +{
>> +    struct ice_pf *pf = devlink_priv(devlink);
>> +    struct device *dev = ice_pf_to_dev(pf);
>> +    int status;
>> +
>> +    status = ice_get_tx_topo_user_sel(pf, &ctx->val.vbool);
>> +    if (status) {
>> +        dev_warn(dev, "Failed to read Tx Scheduler Tree - User 
>> Selection data from flash\n");
>> +        return -EIO;
>> +    }
>> +
>> +    return 0;
>> +}
>> +
>
> As well as the lkp reported issues[1]
>
> [1] 
> https://lore.kernel.org/intel-wired-lan/202207210108.7ZpVcgDQ-lkp@intel.com/



Okay thank you, fixed issues and submitted a new version

BR,
Michał