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From: P Praneesh <ppranees@codeaurora.org>
To: kvalo@codeaurora.org
Cc: ath11k@lists.infradead.org, linux-wireless@vger.kernel.org,
	P Praneesh <ppranees@codeaurora.org>,
	Sriram R <srirrama@codeaurora.org>,
	Jouni Malinen <jouni@codeaurora.org>
Subject: [PATCH v2 09/12] ath11k: remove mod operator in dst ring processing
Date: Wed, 25 Aug 2021 15:07:54 +0530	[thread overview]
Message-ID: <1629884277-18759-10-git-send-email-ppranees@codeaurora.org> (raw)
In-Reply-To: <1629884277-18759-1-git-send-email-ppranees@codeaurora.org>

Replace use of mod operator with a manual wrap around
to avoid additional cost of using mod operation.

Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-01734-QCAHKSWPL_SILICONZ-1 v2

Co-developed-by: Sriram R <srirrama@codeaurora.org>
Signed-off-by: Sriram R <srirrama@codeaurora.org>
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Signed-off-by: P Praneesh <ppranees@codeaurora.org>
---
 drivers/net/wireless/ath/ath11k/hal.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/hal.c b/drivers/net/wireless/ath/ath11k/hal.c
index f04edaf..7cf9e23 100644
--- a/drivers/net/wireless/ath/ath11k/hal.c
+++ b/drivers/net/wireless/ath/ath11k/hal.c
@@ -654,8 +654,11 @@ u32 *ath11k_hal_srng_dst_get_next_entry(struct ath11k_base *ab,
 
 	desc = srng->ring_base_vaddr + srng->u.dst_ring.tp;
 
-	srng->u.dst_ring.tp = (srng->u.dst_ring.tp + srng->entry_size) %
-			      srng->ring_size;
+	srng->u.dst_ring.tp += srng->entry_size;
+
+	/* wrap around to start of ring*/
+	if (srng->u.dst_ring.tp == srng->ring_size)
+		srng->u.dst_ring.tp = 0;
 
 	/* Try to prefetch the next descriptor in the ring */
 	if (srng->flags & HAL_SRNG_FLAGS_CACHED)
-- 
2.7.4


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  parent reply	other threads:[~2021-08-25  9:39 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-25  9:37 [PATCH v2 00/12] ath11k: optimizations in data path P Praneesh
2021-08-25  9:37 ` [PATCH v2 01/12] ath11k: disable unused CE8 interrupts for ipq8074 P Praneesh
2021-08-25  9:37 ` [PATCH v2 02/12] ath11k: allocate dst ring descriptors from cacheable memory P Praneesh
2021-08-25 18:45   ` Peter Oh
2021-08-25  9:37 ` [PATCH v2 03/12] ath11k: modify dp_rx desc access wrapper calls inline P Praneesh
2021-08-25  9:37 ` [PATCH v2 04/12] ath11k: avoid additional access to ath11k_hal_srng_dst_num_free P Praneesh
2021-08-25  9:37 ` [PATCH v2 05/12] ath11k: avoid active pdev check for each msdu P Praneesh
2021-08-25  9:37 ` [PATCH v2 06/12] ath11k: remove usage quota while processing rx packets P Praneesh
2021-08-25  9:37 ` [PATCH v2 07/12] ath11k: add branch predictors in process_rx P Praneesh
2021-08-25 22:49   ` Sergey Ryazanov
2021-08-25  9:37 ` [PATCH v2 08/12] ath11k: allocate HAL_WBM2SW_RELEASE ring from cacheable memory P Praneesh
2021-08-25  9:37 ` P Praneesh [this message]
2021-08-25  9:37 ` [PATCH v2 10/12] ath11k: avoid while loop in ring selection of tx completion interrupt P Praneesh
2021-08-25  9:37 ` [PATCH v2 11/12] ath11k: add branch predictors in dp_tx path P Praneesh
2021-08-25 23:02   ` Sergey Ryazanov
2021-08-25  9:37 ` [PATCH v2 12/12] ath11k: avoid unnecessary lock contention in tx_completion path P Praneesh
2021-08-25 21:56   ` Peter Oh

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