[dpdk-stable] patch 'net/mlx5: move Tx complete request routine' has been queued to stable release 19.11.1

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 19.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 02/13/20. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Thanks.

Luca Boccassi

---
>From 58a7836b5015d81984ec7a597f8753a40589b6dd Mon Sep 17 00:00:00 2001
From: Viacheslav Ovsiienko <viacheslavo at mellanox.com>
Date: Thu, 9 Jan 2020 17:16:04 +0000
Subject: [PATCH] net/mlx5: move Tx complete request routine

[ upstream commit 8b581c690a54be065ecb7b7fd9979c8e86898234 ]

The complete request flag is set once per Tx burst call,
the code of appropriate routine moved to the end of sending
loop. This is preparation step to remove WQE reserved field
usage to store index of elts to free.

Signed-off-by: Viacheslav Ovsiienko <viacheslavo at mellanox.com>
Acked-by: Matan Azrad <matan at mellanox.com>
---
 drivers/net/mlx5/mlx5_rxtx.c | 26 ++++----------------------
 1 file changed, 4 insertions(+), 22 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
index b4702ff9f6..3234ab241e 100644
--- a/drivers/net/mlx5/mlx5_rxtx.c
+++ b/drivers/net/mlx5/mlx5_rxtx.c
@@ -2145,9 +2145,6 @@ mlx5_tx_handle_completion(struct mlx5_txq_data *restrict txq,
  *   Pointer to TX queue structure.
  * @param loc
  *   Pointer to burst routine local context.
- * @param multi,
- *   Routine is called from multi-segment sending loop,
- *   do not correct the elts_head according to the pkts_copy.
  * @param olx
  *   Configured Tx offloads mask. It is fully defined at
  *   compile time and may be used for optimization.
@@ -2155,13 +2152,12 @@ mlx5_tx_handle_completion(struct mlx5_txq_data *restrict txq,
 static __rte_always_inline void
 mlx5_tx_request_completion(struct mlx5_txq_data *restrict txq,
 			   struct mlx5_txq_local *restrict loc,
-			   bool multi,
 			   unsigned int olx)
 {
 	uint16_t head = txq->elts_head;
 	unsigned int part;
 
-	part = (MLX5_TXOFF_CONFIG(INLINE) || multi) ?
+	part = MLX5_TXOFF_CONFIG(INLINE) ?
 	       0 : loc->pkts_sent - loc->pkts_copy;
 	head += part;
 	if ((uint16_t)(head - txq->elts_comp) >= MLX5_TX_COMP_THRESH ||
@@ -3120,8 +3116,6 @@ mlx5_tx_packet_multi_tso(struct mlx5_txq_data *restrict txq,
 	wqe->cseg.sq_ds = rte_cpu_to_be_32(txq->qp_num_8s | ds);
 	txq->wqe_ci += (ds + 3) / 4;
 	loc->wqe_free -= (ds + 3) / 4;
-	/* Request CQE generation if limits are reached. */
-	mlx5_tx_request_completion(txq, loc, true, olx);
 	return MLX5_TXCMP_CODE_MULTI;
 }
 
@@ -3230,8 +3224,6 @@ mlx5_tx_packet_multi_send(struct mlx5_txq_data *restrict txq,
 	} while (true);
 	txq->wqe_ci += (ds + 3) / 4;
 	loc->wqe_free -= (ds + 3) / 4;
-	/* Request CQE generation if limits are reached. */
-	mlx5_tx_request_completion(txq, loc, true, olx);
 	return MLX5_TXCMP_CODE_MULTI;
 }
 
@@ -3388,8 +3380,6 @@ do_align:
 	wqe->cseg.sq_ds = rte_cpu_to_be_32(txq->qp_num_8s | ds);
 	txq->wqe_ci += (ds + 3) / 4;
 	loc->wqe_free -= (ds + 3) / 4;
-	/* Request CQE generation if limits are reached. */
-	mlx5_tx_request_completion(txq, loc, true, olx);
 	return MLX5_TXCMP_CODE_MULTI;
 }
 
@@ -3599,8 +3589,6 @@ mlx5_tx_burst_tso(struct mlx5_txq_data *restrict txq,
 		--loc->elts_free;
 		++loc->pkts_sent;
 		--pkts_n;
-		/* Request CQE generation if limits are reached. */
-		mlx5_tx_request_completion(txq, loc, false, olx);
 		if (unlikely(!pkts_n || !loc->elts_free || !loc->wqe_free))
 			return MLX5_TXCMP_CODE_EXIT;
 		loc->mbuf = *pkts++;
@@ -3750,7 +3738,7 @@ mlx5_tx_sdone_empw(struct mlx5_txq_data *restrict txq,
 		   struct mlx5_txq_local *restrict loc,
 		   unsigned int ds,
 		   unsigned int slen,
-		   unsigned int olx)
+		   unsigned int olx __rte_unused)
 {
 	assert(!MLX5_TXOFF_CONFIG(INLINE));
 #ifdef MLX5_PMD_SOFT_COUNTERS
@@ -3765,8 +3753,6 @@ mlx5_tx_sdone_empw(struct mlx5_txq_data *restrict txq,
 	loc->wqe_last->cseg.sq_ds = rte_cpu_to_be_32(txq->qp_num_8s | ds);
 	txq->wqe_ci += (ds + 3) / 4;
 	loc->wqe_free -= (ds + 3) / 4;
-	/* Request CQE generation if limits are reached. */
-	mlx5_tx_request_completion(txq, loc, false, olx);
 }
 
 /*
@@ -3809,8 +3795,6 @@ mlx5_tx_idone_empw(struct mlx5_txq_data *restrict txq,
 	loc->wqe_last->cseg.sq_ds = rte_cpu_to_be_32(txq->qp_num_8s | len);
 	txq->wqe_ci += (len + 3) / 4;
 	loc->wqe_free -= (len + 3) / 4;
-	/* Request CQE generation if limits are reached. */
-	mlx5_tx_request_completion(txq, loc, false, olx);
 }
 
 /**
@@ -4011,8 +3995,6 @@ next_empw:
 		txq->wqe_ci += (2 + part + 3) / 4;
 		loc->wqe_free -= (2 + part + 3) / 4;
 		pkts_n -= part;
-		/* Request CQE generation if limits are reached. */
-		mlx5_tx_request_completion(txq, loc, false, olx);
 		if (unlikely(!pkts_n || !loc->elts_free || !loc->wqe_free))
 			return MLX5_TXCMP_CODE_EXIT;
 		loc->mbuf = *pkts++;
@@ -4496,8 +4478,6 @@ mlx5_tx_burst_single_send(struct mlx5_txq_data *restrict txq,
 		}
 		++loc->pkts_sent;
 		--pkts_n;
-		/* Request CQE generation if limits are reached. */
-		mlx5_tx_request_completion(txq, loc, false, olx);
 		if (unlikely(!pkts_n || !loc->elts_free || !loc->wqe_free))
 			return MLX5_TXCMP_CODE_EXIT;
 		loc->mbuf = *pkts++;
@@ -4776,6 +4756,8 @@ enter_send_single:
 	/* Take a shortcut if nothing is sent. */
 	if (unlikely(loc.pkts_sent == loc.pkts_loop))
 		goto burst_exit;
+	/* Request CQE generation if limits are reached. */
+	mlx5_tx_request_completion(txq, &loc, olx);
 	/*
 	 * Ring QP doorbell immediately after WQE building completion
 	 * to improve latencies. The pure software related data treatment
-- 
2.20.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2020-02-11 11:17:42.804123071 +0000
+++ 0116-net-mlx5-move-Tx-complete-request-routine.patch	2020-02-11 11:17:38.584004787 +0000
@@ -1,8 +1,10 @@
-From 8b581c690a54be065ecb7b7fd9979c8e86898234 Mon Sep 17 00:00:00 2001
+From 58a7836b5015d81984ec7a597f8753a40589b6dd Mon Sep 17 00:00:00 2001
 From: Viacheslav Ovsiienko <viacheslavo at mellanox.com>
 Date: Thu, 9 Jan 2020 17:16:04 +0000
 Subject: [PATCH] net/mlx5: move Tx complete request routine
 
+[ upstream commit 8b581c690a54be065ecb7b7fd9979c8e86898234 ]
+
 The complete request flag is set once per Tx burst call,
 the code of appropriate routine moved to the end of sending
 loop. This is preparation step to remove WQE reserved field
@@ -15,7 +17,7 @@
  1 file changed, 4 insertions(+), 22 deletions(-)
 
 diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
-index a06db01ba8..0b85634919 100644
+index b4702ff9f6..3234ab241e 100644
 --- a/drivers/net/mlx5/mlx5_rxtx.c
 +++ b/drivers/net/mlx5/mlx5_rxtx.c
 @@ -2145,9 +2145,6 @@ mlx5_tx_handle_completion(struct mlx5_txq_data *restrict txq,