Commit 7395fb49 authored by Manikanta Pubbisetty's avatar Manikanta Pubbisetty Committed by Kalle Valo
Browse files

ath11k: rx path optimizations 



During RX, accessing the reo dest ring descriptor directly is consuming
a lot of CPU cycles. Accessing the descriptor after copying it locally
has improved CPU usage by around ~10-15% while measuring throughput
in RX DBTC test cases(all radios are involved in the throughput
measurement).

HW tested: IPQ8074

Signed-off-by: default avatarManikanta Pubbisetty <mpubbise@codeaurora.org>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1586421797-885-1-git-send-email-mpubbise@codeaurora.org
parent 05090864

drivers/net/wireless/ath/ath11k/dp_rx.c

+7 −7
Original line number Diff line number Diff line
@@ -2403,12 +2403,12 @@ int ath11k_dp_process_rx(struct ath11k_base *ab, int ring_id, 


try_again:

	while ((rx_desc = ath11k_hal_srng_dst_get_next_entry(ab, srng))) {

		struct hal_reo_dest_ring *desc = (struct hal_reo_dest_ring *)rx_desc;

		struct hal_reo_dest_ring desc = *(struct hal_reo_dest_ring *)rx_desc;

		enum hal_reo_dest_ring_push_reason push_reason;

		u32 cookie;



		cookie = FIELD_GET(BUFFER_ADDR_INFO1_SW_COOKIE,

				   desc->buf_addr_info.info1);

				   desc.buf_addr_info.info1);

		buf_id = FIELD_GET(DP_RXDMA_BUF_COOKIE_BUF_ID,

				   cookie);

		mac_id = FIELD_GET(DP_RXDMA_BUF_COOKIE_PDEV_ID, cookie);
@@ -2436,7 +2436,7 @@ try_again: 
		total_msdu_reaped++;



		push_reason = FIELD_GET(HAL_REO_DEST_RING_INFO0_PUSH_REASON,

					desc->info0);

					desc.info0);

		if (push_reason !=

		    HAL_REO_DEST_RING_PUSH_REASON_ROUTING_INSTRUCTION) {

			dev_kfree_skb_any(msdu);
@@ -2444,15 +2444,15 @@ try_again: 
			continue;

		}



		rxcb->is_first_msdu = !!(desc->rx_msdu_info.info0 &

		rxcb->is_first_msdu = !!(desc.rx_msdu_info.info0 &

					 RX_MSDU_DESC_INFO0_FIRST_MSDU_IN_MPDU);

		rxcb->is_last_msdu = !!(desc->rx_msdu_info.info0 &

		rxcb->is_last_msdu = !!(desc.rx_msdu_info.info0 &

					RX_MSDU_DESC_INFO0_LAST_MSDU_IN_MPDU);

		rxcb->is_continuation = !!(desc->rx_msdu_info.info0 &

		rxcb->is_continuation = !!(desc.rx_msdu_info.info0 &

					   RX_MSDU_DESC_INFO0_MSDU_CONTINUATION);

		rxcb->mac_id = mac_id;

		rxcb->tid = FIELD_GET(HAL_REO_DEST_RING_INFO0_RX_QUEUE_NUM,

				      desc->info0);

				      desc.info0);



		__skb_queue_tail(&msdu_list, msdu);

CRA Git | Maintained and supported by SUSTech CRA and CCSE