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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: Manikanta Pubbisetty <mpubbise@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1586421797-885-1-git-send-email-mpubbise@codeaurora.org
This commit is contained in:
Manikanta Pubbisetty 2020-04-09 14:13:17 +05:30 committed by Kalle Valo
parent 05090864fc
commit 7395fb4965
1 changed files with 7 additions and 7 deletions
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14
drivers/net/wireless/ath/ath11k/dp_rx.c
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@ -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 @@ int ath11k_dp_process_rx(struct ath11k_base *ab, int ring_id,
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 @@ int ath11k_dp_process_rx(struct ath11k_base *ab, int ring_id,
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);