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* [dpdk-dev] [PATCH] common/mlx5: fix RSS key copy to TIR context
@ 2020-03-29  9:18 Dekel Peled
  2020-03-30 13:22 ` Raslan Darawsheh
  0 siblings, 1 reply; 2+ messages in thread
From: Dekel Peled @ 2020-03-29  9:18 UTC (permalink / raw)
  To: matan, viacheslavo, rasland; +Cc: dev, stable

In function mlx5_devx_cmd_create_tir(), the 40 bytes of RSS key are
copied in 10 iterations, 4 bytes each time using the MLX5_SET macro.
As result the RSS key is copied into TIR context in swapped byte order.
This patch fixes the issue, using memcpy() to copy the RSS key as is.
The struct member mlx5_devx_tir_attr.rx_hash_toeplitz_key is updated
to byte array type.

Fixes: c3aea272eed8 ("net/mlx5: create advanced Rx object via DevX")
Cc: stable@dpdk.org

Signed-off-by: Dekel Peled <dekelp@mellanox.com>
Acked-by: Matan Azrad <matan@mellanox.com>
---
 drivers/common/mlx5/mlx5_devx_cmds.c |  9 +++------
 drivers/common/mlx5/mlx5_devx_cmds.h |  2 +-
 drivers/net/mlx5/mlx5_rxq.c          |  3 ++-
 drivers/vdpa/mlx5/mlx5_vdpa_steer.c  | 14 ++++++++++----
 4 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/drivers/common/mlx5/mlx5_devx_cmds.c b/drivers/common/mlx5/mlx5_devx_cmds.c
index 1157a44..67c8a8c 100644
--- a/drivers/common/mlx5/mlx5_devx_cmds.c
+++ b/drivers/common/mlx5/mlx5_devx_cmds.c
@@ -759,9 +759,8 @@ struct mlx5_devx_obj *
 {
 	uint32_t in[MLX5_ST_SZ_DW(create_tir_in)] = {0};
 	uint32_t out[MLX5_ST_SZ_DW(create_tir_out)] = {0};
-	void *tir_ctx, *outer, *inner;
+	void *tir_ctx, *outer, *inner, *rss_key;
 	struct mlx5_devx_obj *tir = NULL;
-	int i;
 
 	tir = rte_calloc(__func__, 1, sizeof(*tir), 0);
 	if (!tir) {
@@ -784,10 +783,8 @@ struct mlx5_devx_obj *
 	MLX5_SET(tirc, tir_ctx, rx_hash_fn, tir_attr->rx_hash_fn);
 	MLX5_SET(tirc, tir_ctx, self_lb_block, tir_attr->self_lb_block);
 	MLX5_SET(tirc, tir_ctx, transport_domain, tir_attr->transport_domain);
-	for (i = 0; i < 10; i++) {
-		MLX5_SET(tirc, tir_ctx, rx_hash_toeplitz_key[i],
-			 tir_attr->rx_hash_toeplitz_key[i]);
-	}
+	rss_key = MLX5_ADDR_OF(tirc, tir_ctx, rx_hash_toeplitz_key);
+	memcpy(rss_key, tir_attr->rx_hash_toeplitz_key, MLX5_RSS_HASH_KEY_LEN);
 	outer = MLX5_ADDR_OF(tirc, tir_ctx, rx_hash_field_selector_outer);
 	MLX5_SET(rx_hash_field_select, outer, l3_prot_type,
 		 tir_attr->rx_hash_field_selector_outer.l3_prot_type);
diff --git a/drivers/common/mlx5/mlx5_devx_cmds.h b/drivers/common/mlx5/mlx5_devx_cmds.h
index 20bb294..f7802e6 100644
--- a/drivers/common/mlx5/mlx5_devx_cmds.h
+++ b/drivers/common/mlx5/mlx5_devx_cmds.h
@@ -183,7 +183,7 @@ struct mlx5_devx_tir_attr {
 	uint32_t rx_hash_fn:4;
 	uint32_t self_lb_block:2;
 	uint32_t transport_domain:24;
-	uint32_t rx_hash_toeplitz_key[10];
+	uint8_t rx_hash_toeplitz_key[MLX5_RSS_HASH_KEY_LEN];
 	struct mlx5_rx_hash_field_select rx_hash_field_selector_outer;
 	struct mlx5_rx_hash_field_select rx_hash_field_selector_inner;
 };
diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
index 8a6b410..97ce206 100644
--- a/drivers/net/mlx5/mlx5_rxq.c
+++ b/drivers/net/mlx5/mlx5_rxq.c
@@ -2519,7 +2519,8 @@ struct mlx5_hrxq *
 			tir_attr.transport_domain = priv->sh->td->id;
 		else
 			tir_attr.transport_domain = priv->sh->tdn;
-		memcpy(tir_attr.rx_hash_toeplitz_key, rss_key, rss_key_len);
+		memcpy(tir_attr.rx_hash_toeplitz_key, rss_key,
+		       MLX5_RSS_HASH_KEY_LEN);
 		tir_attr.indirect_table = ind_tbl->rqt->id;
 		if (dev->data->dev_conf.lpbk_mode)
 			tir_attr.self_lb_block =
diff --git a/drivers/vdpa/mlx5/mlx5_vdpa_steer.c b/drivers/vdpa/mlx5/mlx5_vdpa_steer.c
index 36017f1..9f8af4c 100644
--- a/drivers/vdpa/mlx5/mlx5_vdpa_steer.c
+++ b/drivers/vdpa/mlx5/mlx5_vdpa_steer.c
@@ -144,10 +144,16 @@
 		.transport_domain = priv->td->id,
 		.indirect_table = priv->steer.rqt->id,
 		.rx_hash_symmetric = 1,
-		.rx_hash_toeplitz_key = { 0x2cc681d1, 0x5bdbf4f7, 0xfca28319,
-					  0xdb1a3e94, 0x6b9e38d9, 0x2c9c03d1,
-					  0xad9944a7, 0xd9563d59, 0x063c25f3,
-					  0xfc1fdc2a },
+		.rx_hash_toeplitz_key = { 0x2c, 0xc6, 0x81, 0xd1,
+					  0x5b, 0xdb, 0xf4, 0xf7,
+					  0xfc, 0xa2, 0x83, 0x19,
+					  0xdb, 0x1a, 0x3e, 0x94,
+					  0x6b, 0x9e, 0x38, 0xd9,
+					  0x2c, 0x9c, 0x03, 0xd1,
+					  0xad, 0x99, 0x44, 0xa7,
+					  0xd9, 0x56, 0x3d, 0x59,
+					  0x06, 0x3c, 0x25, 0xf3,
+					  0xfc, 0x1f, 0xdc, 0x2a },
 	};
 	struct {
 		size_t size;
-- 
1.8.3.1


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2020-03-29  9:18 [dpdk-dev] [PATCH] common/mlx5: fix RSS key copy to TIR context Dekel Peled
2020-03-30 13:22 ` Raslan Darawsheh

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