netdev - [PATCH net-next 3/5] mlxsw: core: Add QOS

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Message-Id: <20200319134724.1036942-4-idosch@idosch.org>
Date:   Thu, 19 Mar 2020 15:47:22 +0200
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, jiri@...lanox.com,
        jhs@...atatu.com, xiyou.wangcong@...il.com, petrm@...lanox.com,
        mlxsw@...lanox.com, Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next 3/5] mlxsw: core: Add QOS_ACTION

From: Petr Machata <petrm@...lanox.com>

The QOS_ACTION is used for manipulating the QoS attributes of a packet.
Add the corresponding defines and helpers, in particular for the
switch_priority override.

Signed-off-by: Petr Machata <petrm@...lanox.com>
Reviewed-by: Jiri Pirko <jiri@...lanox.com>
Signed-off-by: Ido Schimmel <idosch@...lanox.com>
---
 .../mellanox/mlxsw/core_acl_flex_actions.c    | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c b/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c
index 1f2e6db743e1..fbb76377adf8 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c
@@ -1238,6 +1238,41 @@ mlxsw_afa_block_append_mirror(struct mlxsw_afa_block *block, u8 local_in_port,
 }
 EXPORT_SYMBOL(mlxsw_afa_block_append_mirror);
 
+/* QoS Action
+ * ----------
+ * The QOS_ACTION is used for manipulating the QoS attributes of a packet. It
+ * can be used to change the DCSP, ECN, Color and Switch Priority of the packet.
+ * Note that PCP field can be changed using the VLAN action.
+ */
+
+#define MLXSW_AFA_QOS_CODE 0x06
+#define MLXSW_AFA_QOS_SIZE 1
+
+enum mlxsw_afa_qos_cmd {
+	/* Do nothing */
+	MLXSW_AFA_QOS_CMD_NOP,
+	/* Set a field */
+	MLXSW_AFA_QOS_CMD_SET,
+};
+
+/* afa_qos_switch_prio_cmd
+ * Switch Priority command as per mlxsw_afa_qos_cmd.
+ */
+MLXSW_ITEM32(afa, qos, switch_prio_cmd, 0x08, 14, 2);
+
+/* afa_qos_switch_prio
+ * Switch Priority.
+ */
+MLXSW_ITEM32(afa, qos, switch_prio, 0x08, 0, 4);
+
+static inline void
+mlxsw_afa_qos_switch_prio_pack(char *payload,
+			       enum mlxsw_afa_qos_cmd prio_cmd, u8 prio)
+{
+	mlxsw_afa_qos_switch_prio_cmd_set(payload, prio_cmd);
+	mlxsw_afa_qos_switch_prio_set(payload, prio);
+}
+
 /* Forwarding Action
  * -----------------
  * Forwarding Action can be used to implement Policy Based Switching (PBS)
-- 
2.24.1