netdev - [net 06/15] net/mlx5e: kTLS, Save by-value copy of the record frags

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Date:   Fri, 18 Oct 2019 19:38:12 +0000
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Tariq Toukan <tariqt@...lanox.com>,
        Eran Ben Elisha <eranbe@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [net 06/15] net/mlx5e: kTLS, Save by-value copy of the record frags

From: Tariq Toukan <tariqt@...lanox.com>

Access the record fragments only under the TLS ctx lock.
In the resync flow, save a copy of them to be used when
preparing and posting the required DUMP WQEs.

Fixes: d2ead1f360e8 ("net/mlx5e: Add kTLS TX HW offload support")
Signed-off-by: Tariq Toukan <tariqt@...lanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
 .../net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c    | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c
index 6dfb22d705b2..334808b1863b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c
@@ -179,7 +179,7 @@ struct tx_sync_info {
 	u64 rcd_sn;
 	s32 sync_len;
 	int nr_frags;
-	skb_frag_t *frags[MAX_SKB_FRAGS];
+	skb_frag_t frags[MAX_SKB_FRAGS];
 };
 
 static bool tx_sync_info_get(struct mlx5e_ktls_offload_context_tx *priv_tx,
@@ -212,11 +212,11 @@ static bool tx_sync_info_get(struct mlx5e_ktls_offload_context_tx *priv_tx,
 
 		get_page(skb_frag_page(frag));
 		remaining -= skb_frag_size(frag);
-		info->frags[i++] = frag;
+		info->frags[i++] = *frag;
 	}
 	/* reduce the part which will be sent with the original SKB */
 	if (remaining < 0)
-		skb_frag_size_add(info->frags[i - 1], remaining);
+		skb_frag_size_add(&info->frags[i - 1], remaining);
 	info->nr_frags = i;
 out:
 	spin_unlock_irqrestore(&tx_ctx->lock, flags);
@@ -365,7 +365,7 @@ mlx5e_ktls_tx_handle_ooo(struct mlx5e_ktls_offload_context_tx *priv_tx,
 	tx_post_resync_params(sq, priv_tx, info.rcd_sn);
 
 	for (i = 0; i < info.nr_frags; i++)
-		if (tx_post_resync_dump(sq, info.frags[i], priv_tx->tisn, !i))
+		if (tx_post_resync_dump(sq, &info.frags[i], priv_tx->tisn, !i))
 			goto err_out;
 
 	/* If no dump WQE was sent, we need to have a fence NOP WQE before the
-- 
2.21.0