net/mlx5: Generalize Flow Context for new crypto fields

In order to support MACsec offload (and maybe some other crypto features
in the future), generalize flow action parameters / defines to be used by
crypto offlaods other than IPsec.
The following changes made:
ipsec_obj_id field at flow action context was changed to crypto_obj_id,
intreduced a new crypto_type field where IPsec is the default zero type
for backward compatibility.
Action ipsec_decrypt was changed to crypto_decrypt.
Action ipsec_encrypt was changed to crypto_encrypt.

IPsec offload code was updated accordingly for backward compatibility.

Signed-off-by: Lior Nahmanson <[email protected]>
Reviewed-by: Raed Salem <[email protected]>
Signed-off-by: Raed Salem <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: Lior Nahmanson

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_fs.c

@@ -388,7 +388,8 @@ static void setup_fte_common(struct mlx5_accel_esp_xfrm_attrs *attrs,
 		       0xff, 16);
 	}
 
-	flow_act->ipsec_obj_id = ipsec_obj_id;
+	flow_act->crypto.type = MLX5_FLOW_CONTEXT_ENCRYPT_DECRYPT_TYPE_IPSEC;
+	flow_act->crypto.obj_id = ipsec_obj_id;
 	flow_act->flags |= FLOW_ACT_NO_APPEND;
 }
 
@@ -444,7 +445,7 @@ static int rx_add_rule(struct mlx5e_priv *priv,
 	}
 
 	flow_act.action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
-			  MLX5_FLOW_CONTEXT_ACTION_IPSEC_DECRYPT |
+			  MLX5_FLOW_CONTEXT_ACTION_CRYPTO_DECRYPT |
 			  MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
 	dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
 	flow_act.modify_hdr = modify_hdr;
@@ -500,7 +501,7 @@ static int tx_add_rule(struct mlx5e_priv *priv,
 		 MLX5_ETH_WQE_FT_META_IPSEC);
 
 	flow_act.action = MLX5_FLOW_CONTEXT_ACTION_ALLOW |
-			  MLX5_FLOW_CONTEXT_ACTION_IPSEC_ENCRYPT;
+			  MLX5_FLOW_CONTEXT_ACTION_CRYPTO_ENCRYPT;
 	rule = mlx5_add_flow_rules(priv->ipsec->tx_fs->ft, spec, &flow_act, NULL, 0);
 	if (IS_ERR(rule)) {
 		err = PTR_ERR(rule);

drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c

@@ -577,7 +577,10 @@ static int mlx5_cmd_set_fte(struct mlx5_core_dev *dev,
 		MLX5_SET(flow_context, in_flow_context, modify_header_id,
 			 fte->action.modify_hdr->id);
 
-	MLX5_SET(flow_context, in_flow_context, ipsec_obj_id, fte->action.ipsec_obj_id);
+	MLX5_SET(flow_context, in_flow_context, encrypt_decrypt_type,
+		 fte->action.crypto.type);
+	MLX5_SET(flow_context, in_flow_context, encrypt_decrypt_obj_id,
+		 fte->action.crypto.obj_id);
 
 	vlan = MLX5_ADDR_OF(flow_context, in_flow_context, push_vlan);
 

include/linux/mlx5/fs.h

@@ -243,9 +243,10 @@ struct mlx5_flow_act {
 	u32 action;
 	struct mlx5_modify_hdr  *modify_hdr;
 	struct mlx5_pkt_reformat *pkt_reformat;
-	union {
-		u32 ipsec_obj_id;
-	};
+	struct mlx5_flow_act_crypto_params {
+		u8 type;
+		u32 obj_id;
+	} crypto;
 	u32 flags;
 	struct mlx5_fs_vlan vlan[MLX5_FS_VLAN_DEPTH];
 	struct ib_counters *counters;

include/linux/mlx5/mlx5_ifc.h

@@ -3310,8 +3310,8 @@ enum {
 	MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH = 0x100,
 	MLX5_FLOW_CONTEXT_ACTION_VLAN_POP_2  = 0x400,
 	MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH_2 = 0x800,
-	MLX5_FLOW_CONTEXT_ACTION_IPSEC_DECRYPT = 0x1000,
-	MLX5_FLOW_CONTEXT_ACTION_IPSEC_ENCRYPT = 0x2000,
+	MLX5_FLOW_CONTEXT_ACTION_CRYPTO_DECRYPT = 0x1000,
+	MLX5_FLOW_CONTEXT_ACTION_CRYPTO_ENCRYPT = 0x2000,
 	MLX5_FLOW_CONTEXT_ACTION_EXECUTE_ASO = 0x4000,
 };
 
@@ -3321,6 +3321,10 @@ enum {
 	MLX5_FLOW_CONTEXT_FLOW_SOURCE_LOCAL_VPORT       = 0x2,
 };
 
+enum {
+	MLX5_FLOW_CONTEXT_ENCRYPT_DECRYPT_TYPE_IPSEC   = 0x0,
+};
+
 struct mlx5_ifc_vlan_bits {
 	u8         ethtype[0x10];
 	u8         prio[0x3];
@@ -3374,7 +3378,7 @@ struct mlx5_ifc_flow_context_bits {
 	u8         extended_destination[0x1];
 	u8         reserved_at_81[0x1];
 	u8         flow_source[0x2];
-	u8         reserved_at_84[0x4];
+	u8         encrypt_decrypt_type[0x4];
 	u8         destination_list_size[0x18];
 
 	u8         reserved_at_a0[0x8];
@@ -3386,7 +3390,7 @@ struct mlx5_ifc_flow_context_bits {
 
 	struct mlx5_ifc_vlan_bits push_vlan_2;
 
-	u8         ipsec_obj_id[0x20];
+	u8         encrypt_decrypt_obj_id[0x20];
 	u8         reserved_at_140[0xc0];
 
 	struct mlx5_ifc_fte_match_param_bits match_value;