Re: [PATCH ath-next] wifi: ath12k: change MAC buffer ring size to 4096

[Rameshkumar Sundaram <rameshkumar.sundaram@oss.qualcomm.com>]

On 6/10/2026 8:43 AM, Yingying Tang wrote:
> For WCN7850, MAC buffer ring size is updated to 2048 in
> 955df16f2a4c3 ("wifi: ath12k: change MAC buffer ring size to 2048")
> to increase peak throughput.
> 
> But during the RX process, a phenomenon can still be observed where
> the throughput drops by about 30% from its peak value and then recovers,
> and this behavior repeats during RX.
> 
> After increasing MAC buffer ring size to 4096, the data rate drop has
> gone.
> 
> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3
> 
> Signed-off-by: Yingying Tang <yingying.tang@oss.qualcomm.com>
> ---
>   drivers/net/wireless/ath/ath12k/dp.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/wireless/ath/ath12k/dp.h b/drivers/net/wireless/ath/ath12k/dp.h
> index f8cfc7bb29dd..6596089d4168 100644
> --- a/drivers/net/wireless/ath/ath12k/dp.h
> +++ b/drivers/net/wireless/ath/ath12k/dp.h
> @@ -205,7 +205,7 @@ struct ath12k_pdev_dp {
>   #define DP_REO_CMD_RING_SIZE		256
>   #define DP_REO_STATUS_RING_SIZE		2048
>   #define DP_RXDMA_BUF_RING_SIZE		4096
> -#define DP_RX_MAC_BUF_RING_SIZE		2048
> +#define DP_RX_MAC_BUF_RING_SIZE		4096
>   #define DP_RXDMA_REFILL_RING_SIZE	2048
>   #define DP_RXDMA_ERR_DST_RING_SIZE	1024
>   #define DP_RXDMA_MON_STATUS_RING_SIZE	1024

Reviewed-by: Rameshkumar Sundaram <rameshkumar.sundaram@oss.qualcomm.com>