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From: Tyler Retzlaff <roretzla@linux.microsoft.com>
To: dev@dpdk.org
Cc: Honnappa.Nagarahalli@arm.com, Ruifeng.Wang@arm.com,
	thomas@monjalon.net, pbhagavatula@marvell.com,
	ndabilpuram@marvell.com,
	Tyler Retzlaff <roretzla@linux.microsoft.com>
Subject: [PATCH v3 06/16] net/cnxk: use previous value atomic fetch operations
Date: Mon, 20 Mar 2023 12:00:26 -0700	[thread overview]
Message-ID: <1679338836-21321-7-git-send-email-roretzla@linux.microsoft.com> (raw)
In-Reply-To: <1679338836-21321-1-git-send-email-roretzla@linux.microsoft.com>

Use __atomic_fetch_{add,and,or,sub,xor} instead of
__atomic_{add,and,or,sub,xor}_fetch adding the necessary code to
allow consumption of the resulting value.

Signed-off-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
Acked-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
---
 drivers/net/cnxk/cn10k_tx.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/cnxk/cn10k_tx.h b/drivers/net/cnxk/cn10k_tx.h
index a72a803..c9ec01c 100644
--- a/drivers/net/cnxk/cn10k_tx.h
+++ b/drivers/net/cnxk/cn10k_tx.h
@@ -108,7 +108,7 @@
 retry:
 	while (__atomic_load_n(&txq->fc_cache_pkts, __ATOMIC_RELAXED) < 0)
 		;
-	cached = __atomic_sub_fetch(&txq->fc_cache_pkts, req, __ATOMIC_ACQUIRE);
+	cached = __atomic_fetch_sub(&txq->fc_cache_pkts, req, __ATOMIC_ACQUIRE) - req;
 	/* Check if there is enough space, else update and retry. */
 	if (cached < 0) {
 		/* Check if we have space else retry. */
@@ -302,7 +302,7 @@
 
 again:
 	fc_sw = txq->cpt_fc_sw;
-	val = __atomic_sub_fetch(fc_sw, nb_pkts, __ATOMIC_RELAXED);
+	val = __atomic_fetch_sub(fc_sw, nb_pkts, __ATOMIC_RELAXED) - nb_pkts;
 	if (likely(val >= 0))
 		return;
 
-- 
1.8.3.1


  parent reply	other threads:[~2023-03-20 19:01 UTC|newest]

Thread overview: 59+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-10 22:15 [PATCH 00/16] use __atomic operations returning new value Tyler Retzlaff
2023-03-10 22:15 ` [PATCH 01/16] app/test: use previous value atomic fetch operations Tyler Retzlaff
2023-03-10 22:15 ` [PATCH 02/16] common/cnxk: " Tyler Retzlaff
2023-03-10 22:15 ` [PATCH 03/16] common/mlx5: " Tyler Retzlaff
2023-03-10 22:15 ` [PATCH 04/16] drivers/event: " Tyler Retzlaff
2023-03-13  7:02   ` [EXT] " Pavan Nikhilesh Bhagavatula
2023-03-10 22:15 ` [PATCH 05/16] net/af_xdp: " Tyler Retzlaff
2023-03-10 22:15 ` [PATCH 06/16] net/cnxk: " Tyler Retzlaff
2023-03-13  6:45   ` [EXT] " Nithin Kumar Dabilpuram
2023-03-10 22:15 ` [PATCH 07/16] net/cxgbe: " Tyler Retzlaff
2023-03-10 22:15 ` [PATCH 08/16] net/iavf: " Tyler Retzlaff
2023-03-10 22:15 ` [PATCH 09/16] net/mlx5: " Tyler Retzlaff
2023-03-10 22:15 ` [PATCH 10/16] net/octeontx: " Tyler Retzlaff
2023-03-10 22:15 ` [PATCH 11/16] raw/ifpga: " Tyler Retzlaff
2023-03-10 22:15 ` [PATCH 12/16] bbdev: " Tyler Retzlaff
2023-03-10 22:15 ` [PATCH 13/16] eal: " Tyler Retzlaff
2023-03-10 22:15 ` [PATCH 14/16] ipsec: " Tyler Retzlaff
2023-03-10 22:15 ` [PATCH 15/16] mbuf: " Tyler Retzlaff
2023-03-10 22:15 ` [PATCH 16/16] rcu: " Tyler Retzlaff
2023-03-15 21:15 ` [PATCH v2 00/16] replace __atomic operations returning new value Tyler Retzlaff
2023-03-15 21:15   ` [PATCH v2 01/16] app/test: use previous value atomic fetch operations Tyler Retzlaff
2023-03-15 21:15   ` [PATCH v2 02/16] common/cnxk: " Tyler Retzlaff
2023-03-15 21:15   ` [PATCH v2 03/16] common/mlx5: " Tyler Retzlaff
2023-03-15 21:15   ` [PATCH v2 04/16] drivers/event: " Tyler Retzlaff
2023-03-15 21:15   ` [PATCH v2 05/16] net/af_xdp: " Tyler Retzlaff
2023-03-15 21:15   ` [PATCH v2 06/16] net/cnxk: " Tyler Retzlaff
2023-03-15 21:15   ` [PATCH v2 07/16] net/cxgbe: " Tyler Retzlaff
2023-03-15 21:15   ` [PATCH v2 08/16] net/iavf: " Tyler Retzlaff
2023-03-15 21:15   ` [PATCH v2 09/16] net/mlx5: " Tyler Retzlaff
2023-03-15 21:15   ` [PATCH v2 10/16] net/octeontx: " Tyler Retzlaff
2023-03-15 21:15   ` [PATCH v2 11/16] raw/ifpga: " Tyler Retzlaff
2023-03-15 21:15   ` [PATCH v2 12/16] bbdev: " Tyler Retzlaff
2023-03-15 21:15   ` [PATCH v2 13/16] eal: " Tyler Retzlaff
2023-03-15 21:15   ` [PATCH v2 14/16] ipsec: " Tyler Retzlaff
2023-03-15 21:15   ` [PATCH v2 15/16] mbuf: " Tyler Retzlaff
2023-03-15 21:15   ` [PATCH v2 16/16] rcu: " Tyler Retzlaff
2023-03-16 10:03   ` [PATCH v2 00/16] replace __atomic operations returning new value Bruce Richardson
2023-03-16 15:25     ` Thomas Monjalon
2023-03-16 16:17       ` Tyler Retzlaff
2023-04-18 18:11         ` Tyler Retzlaff
2023-03-20 10:24   ` Ruifeng Wang
2023-03-20 19:00 ` [PATCH v3 " Tyler Retzlaff
2023-03-20 19:00   ` [PATCH v3 01/16] app/test: use previous value atomic fetch operations Tyler Retzlaff
2023-03-20 19:00   ` [PATCH v3 02/16] common/cnxk: " Tyler Retzlaff
2023-03-20 19:00   ` [PATCH v3 03/16] common/mlx5: " Tyler Retzlaff
2023-03-20 19:00   ` [PATCH v3 04/16] drivers/event: " Tyler Retzlaff
2023-03-20 19:00   ` [PATCH v3 05/16] net/af_xdp: " Tyler Retzlaff
2023-03-20 19:00   ` Tyler Retzlaff [this message]
2023-03-20 19:00   ` [PATCH v3 07/16] net/cxgbe: " Tyler Retzlaff
2023-03-20 19:00   ` [PATCH v3 08/16] net/iavf: " Tyler Retzlaff
2023-03-20 19:00   ` [PATCH v3 09/16] net/mlx5: " Tyler Retzlaff
2023-03-20 19:00   ` [PATCH v3 10/16] net/octeontx: " Tyler Retzlaff
2023-03-20 19:00   ` [PATCH v3 11/16] raw/ifpga: " Tyler Retzlaff
2023-03-20 19:00   ` [PATCH v3 12/16] bbdev: " Tyler Retzlaff
2023-03-20 19:00   ` [PATCH v3 13/16] eal: " Tyler Retzlaff
2023-03-20 19:00   ` [PATCH v3 14/16] ipsec: " Tyler Retzlaff
2023-03-20 19:00   ` [PATCH v3 15/16] mbuf: " Tyler Retzlaff
2023-03-20 19:00   ` [PATCH v3 16/16] rcu: " Tyler Retzlaff
2023-04-25  9:10   ` [PATCH v3 00/16] replace __atomic operations returning new value David Marchand

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