[dpdk-dev] [PATCH v3 07/17] net/mlx5: create Tx queues with DevX

[Ferruh Yigit]

On 7/20/2020 3:18 PM, Ferruh Yigit wrote:
> On 7/16/2020 9:23 AM, Viacheslav Ovsiienko wrote:
>> To provide the packet send schedule on mbuf timestamp the Tx
>> queue must be attached to the same UAR as Clock Queue is.
>> UAR is special hardware related resource mapped to the host
>> memory and provides doorbell registers, the assigning UAR
>> to the queue being created is provided via DevX API only.
>>
>> Signed-off-by: Viacheslav Ovsiienko <viacheslavo at mellanox.com>
>> Acked-by: Matan Azrad <matan at mellanox.com>
> 
> <...>
> 
>> +	MLX5_ASSERT(sh->tx_uar);
>> +	MLX5_ASSERT(sh->tx_uar->reg_addr);
>> +	txq_ctrl->bf_reg = sh->tx_uar->reg_addr;
>> +	txq_ctrl->uar_mmap_offset = sh->tx_uar->mmap_off;
>> +	rte_atomic32_set(&txq_obj->refcnt, 1);
> 
> This is using a function we plan to deprecate in long term, and checkpatch has a
> warning for it [1].
> 
> To prevent this being blocker, I will preceed with the patchset and can you
> please send an increamental patch to fix it, I can squash it before -rc2.
> 
> Thanks,
> ferruh
> 
> 
> [1]
> Warning in drivers/net/mlx5/mlx5_txq.c:
> Using rte_atomicNN_xxx
> 

cc'ed Honnapa too, from techboard discussion [2] I understand we won't accept
new code with old API. But also to be fair the check was not there until last
week so this was easy to miss by developers.

@Slava, can you please do your best to replace them before the release? Perhaps
@Honnappa can support on the effort?

And if this can't be done withing the release not sure what to do, one option is
to get them with the commitment from Mellanox to fix this on 20.11?

[2]
https://mails.dpdk.org/archives/dev/2020-April/165143.html