net/mlx4_core: Add firmware commands to support device managed flow steering

Add support for firmware commands to attach/detach a new device managed
steering mode. Such network steering rules allow the user to provide an
L2/L3/L4 flow specification to the firmware and have the device to steer
traffic that matches that specification to the provided QP.

Signed-off-by: Hadar Hen Zion <hadarh@mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 29 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/mcg.c b/drivers/net/ethernet/mellanox/mlx4/mcg.c
index 319c9d45d59a..3c59a33a98a5 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mcg.c
+++ b/drivers/net/ethernet/mellanox/mlx4/mcg.c
@@ -62,6 +62,35 @@ int mlx4_get_qp_per_mgm(struct mlx4_dev *dev)
         return 4 * (mlx4_get_mgm_entry_size(dev) / 16 - 2);
 }
 
+static int mlx4_QP_FLOW_STEERING_ATTACH(struct mlx4_dev *dev,
+                                        struct mlx4_cmd_mailbox *mailbox,
+                                        u32 size,
+                                        u64 *reg_id)
+{
+        u64 imm;
+        int err = 0;
+
+        err = mlx4_cmd_imm(dev, mailbox->dma, &imm, size, 0,
+                           MLX4_QP_FLOW_STEERING_ATTACH, MLX4_CMD_TIME_CLASS_A,
+                           MLX4_CMD_NATIVE);
+        if (err)
+                return err;
+        *reg_id = imm;
+
+        return err;
+}
+
+static int mlx4_QP_FLOW_STEERING_DETACH(struct mlx4_dev *dev, u64 regid)
+{
+        int err = 0;
+
+        err = mlx4_cmd(dev, regid, 0, 0,
+                       MLX4_QP_FLOW_STEERING_DETACH, MLX4_CMD_TIME_CLASS_A,
+                       MLX4_CMD_NATIVE);
+
+        return err;
+}
+
 static int mlx4_READ_ENTRY(struct mlx4_dev *dev, int index,
                            struct mlx4_cmd_mailbox *mailbox)
 {