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Subject: Re: [PATCH] ath11k: Update tx descriptor search index properly
To:     Karthikeyan periyasamy <periyasa@codeaurora.org>
Cc:     ath11k@lists.infradead.org, linux-wireless@vger.kernel.org
References: <1608305041-21946-1-git-send-email-periyasa@codeaurora.org>
 <959ea12a-e35b-5867-c55e-7f62e2956b09@eero.com>
 <d6cbfd2aff787faa3be69252b2677df9@codeaurora.org>
From:   Peter Oh <peter.oh@eero.com>
Message-ID: <08ef5e10-de7a-fe13-d23a-d1afa1dbd0e5@eero.com>
Date:   Wed, 3 Feb 2021 11:29:45 -0800
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On 1/26/21 6:46 PM, Karthikeyan periyasamy wrote:
> On 2020-12-19 00:53, Peter Oh wrote:
>> On 12/18/20 7:24 AM, Karthikeyan Periyasamy wrote:
>>> Tx descriptor search index field should be updated with hw peer id
>>> and not by AST Hash. Incorrect search index causes throughput 
>>> degradation
>>> in all the platforms. so updated the search index field with hw peer 
>>> id,
>>> which is a common change applicable for all the platforms.
>>>
>>> Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-01492-QCAHKSWPL_SILICONZ-1
>>>
>>> diff --git a/drivers/net/wireless/ath/ath11k/peer.c 
>>> b/drivers/net/wireless/ath/ath11k/peer.c
>>> index b69e7eb..f49abefa 100644
>>> --- a/drivers/net/wireless/ath/ath11k/peer.c
>>> +++ b/drivers/net/wireless/ath/ath11k/peer.c
>>>
>>> @@ -309,7 +310,11 @@ int ath11k_peer_create(struct ath11k *ar, 
>>> struct ath11k_vif *arvif,
>>>         peer->pdev_idx = ar->pdev_idx;
>>>       peer->sta = sta;
>>> -    arvif->ast_hash = peer->ast_hash;
>>> +
>>> +    if (arvif->vif->type == NL80211_IFTYPE_STATION) {
>>> +        arvif->ast_hash = peer->ast_hash;
>>> +        arvif->ast_idx = peer->hw_peer_id;
>>> +    }
>>
>> How about non STATION type?
>>
>
> no need of configuring the ast_idx, ast_hash field for non station 
> type. Its recommended by HW/FW team.
>
Can you add this comment in commit message?

Also could you include the answer to "what conditions you observed the
throughput degradation?" in commit message too?


Thanks,

Peter