[PATCH] net/mlx5: fix RSS hash types adjustment

[PATCH] net/mlx5: fix RSS hash types adjustment

[Dariusz Sosnowski]

When an indirect action was created with an RSS action configured to
hash on both source and destination L3 addresses (or L4 ports), it caused
shared hrxq to be configured to hash only on destination address
(or port).

This patch fixes this behavior by refining RSS types specified in
configuration before calculating hash types used for hrxq. Refining RSS
types removes *_SRC_ONLY and *_DST_ONLY flags if they are both set.

Fixes: 212d17b6a650 ("net/mlx5: fix missing shared RSS hash types")
Cc: jackmin@nvidia.com
Cc: stable@dpdk.org

Signed-off-by: Dariusz Sosnowski <dsosnowski@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
---
 drivers/net/mlx5/mlx5_flow_dv.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index 1e9bd63635..6e30e94d07 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -14792,8 +14792,8 @@ __flow_dv_action_rss_hrxqs_release(struct rte_eth_dev *dev,
  * MLX5_RSS_HASH_IPV4_DST_ONLY are mutually exclusive so they can share
  * same slot in mlx5_rss_hash_fields.
  *
- * @param[in] rss_types
- *   RSS type.
+ * @param[in] orig_rss_types
+ *   RSS type as provided in shared RSS action.
  * @param[in, out] hash_field
  *   hash_field variable needed to be adjusted.
  *
@@ -14801,9 +14801,11 @@ __flow_dv_action_rss_hrxqs_release(struct rte_eth_dev *dev,
  *   void
  */
 void
-flow_dv_action_rss_l34_hash_adjust(uint64_t rss_types,
+flow_dv_action_rss_l34_hash_adjust(uint64_t orig_rss_types,
 				   uint64_t *hash_field)
 {
+	uint64_t rss_types = rte_eth_rss_hf_refine(orig_rss_types);
+
 	switch (*hash_field & ~IBV_RX_HASH_INNER) {
 	case MLX5_RSS_HASH_IPV4:
 		if (rss_types & MLX5_IPV4_LAYER_TYPES) {
-- 
2.25.1

RE: [PATCH] net/mlx5: fix RSS hash types adjustment

[Raslan Darawsheh]

Hi,

> -----Original Message-----
> From: Dariusz Sosnowski <dsosnowski@nvidia.com>
> Sent: Thursday, April 21, 2022 11:37 PM
> To: Matan Azrad <matan@nvidia.com>; Slava Ovsiienko
> <viacheslavo@nvidia.com>; Jack Min <jackmin@nvidia.com>
> Cc: dev@dpdk.org; Raslan Darawsheh <rasland@nvidia.com>;
> stable@dpdk.org
> Subject: [PATCH] net/mlx5: fix RSS hash types adjustment
> 
> When an indirect action was created with an RSS action configured to
> hash on both source and destination L3 addresses (or L4 ports), it caused
> shared hrxq to be configured to hash only on destination address
> (or port).
> 
> This patch fixes this behavior by refining RSS types specified in
> configuration before calculating hash types used for hrxq. Refining RSS
> types removes *_SRC_ONLY and *_DST_ONLY flags if they are both set.
> 
> Fixes: 212d17b6a650 ("net/mlx5: fix missing shared RSS hash types")
> Cc: jackmin@nvidia.com
> Cc: stable@dpdk.org
> 
> Signed-off-by: Dariusz Sosnowski <dsosnowski@nvidia.com>
> Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>

Patch applied to next-net-mlx,

Kindest regards,
Raslan Darawsheh