netdev - [PATCH V2 mlx5-next 01/11] net/mlx5: E-Switch: Introduce prio tag mode

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Message-ID: <20190429181326.6262-2-saeedm@mellanox.com>
Date:   Mon, 29 Apr 2019 18:14:01 +0000
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     Saeed Mahameed <saeedm@...lanox.com>,
        Leon Romanovsky <leonro@...lanox.com>
CC:     Jason Gunthorpe <jgg@...lanox.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        Eli Britstein <elibr@...lanox.com>,
        Oz Shlomo <ozsh@...lanox.com>
Subject: [PATCH V2 mlx5-next 01/11] net/mlx5: E-Switch: Introduce prio tag
 mode

From: Eli Britstein <elibr@...lanox.com>

Current ConnectX HW is unable to perform VLAN pop in TX path and VLAN
push on RX path. To workaround that limitation untagged packets will be
tagged with VLAN ID 0x000 (priority tag) and pop/push actions will be
replaced by VLAN re-write actions (which are supported by the HW).
Introduce prio tag mode as a pre-step to controlling the workaround
behavior.

Signed-off-by: Eli Britstein <elibr@...lanox.com>
Reviewed-by: Oz Shlomo <ozsh@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
 include/linux/mlx5/mlx5_ifc.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index 4b37519bd6a5..eeedf3f53ed3 100644
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -951,7 +951,9 @@ struct mlx5_ifc_cmd_hca_cap_bits {
 
 	u8         log_max_srq_sz[0x8];
 	u8         log_max_qp_sz[0x8];
-	u8         reserved_at_90[0xb];
+	u8         reserved_at_90[0x8];
+	u8         prio_tag_required[0x1];
+	u8         reserved_at_99[0x2];
 	u8         log_max_qp[0x5];
 
 	u8         reserved_at_a0[0xb];
-- 
2.20.1