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>

5 files changed, 86 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/cmd.c b/drivers/net/ethernet/mellanox/mlx4/cmd.c
index 842c8ce9494e..7e94987d030c 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cmd.c
@@ -1080,6 +1080,25 @@ static struct mlx4_cmd_info cmd_info[] = {
                 .verify = NULL,
                 .wrapper = NULL
         },
+        /* flow steering commands */
+        {
+                .opcode = MLX4_QP_FLOW_STEERING_ATTACH,
+                .has_inbox = true,
+                .has_outbox = false,
+                .out_is_imm = true,
+                .encode_slave_id = false,
+                .verify = NULL,
+                .wrapper = mlx4_QP_FLOW_STEERING_ATTACH_wrapper
+        },
+        {
+                .opcode = MLX4_QP_FLOW_STEERING_DETACH,
+                .has_inbox = false,
+                .has_outbox = false,
+                .out_is_imm = false,
+                .encode_slave_id = false,
+                .verify = NULL,
+                .wrapper = mlx4_QP_FLOW_STEERING_DETACH_wrapper
+        },
 };
 
 static int mlx4_master_process_vhcr(struct mlx4_dev *dev, int slave,
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)
 {
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4.h b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
index a425a984758f..c07e882e8369 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
@@ -1118,6 +1118,16 @@ int mlx4_QUERY_IF_STAT_wrapper(struct mlx4_dev *dev, int slave,
                                struct mlx4_cmd_mailbox *inbox,
                                struct mlx4_cmd_mailbox *outbox,
                                struct mlx4_cmd_info *cmd);
+int mlx4_QP_FLOW_STEERING_ATTACH_wrapper(struct mlx4_dev *dev, int slave,
+                                         struct mlx4_vhcr *vhcr,
+                                         struct mlx4_cmd_mailbox *inbox,
+                                         struct mlx4_cmd_mailbox *outbox,
+                                         struct mlx4_cmd_info *cmd);
+int mlx4_QP_FLOW_STEERING_DETACH_wrapper(struct mlx4_dev *dev, int slave,
+                                         struct mlx4_vhcr *vhcr,
+                                         struct mlx4_cmd_mailbox *inbox,
+                                         struct mlx4_cmd_mailbox *outbox,
+                                         struct mlx4_cmd_info *cmd);
 
 int mlx4_get_mgm_entry_size(struct mlx4_dev *dev);
 int mlx4_get_qp_per_mgm(struct mlx4_dev *dev);
diff --git a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
index 6bdac2955f8b..a8ca960f4620 100644
--- a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
+++ b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
@@ -2738,6 +2738,30 @@ ex_put:
         return err;
 }
 
+int mlx4_QP_FLOW_STEERING_ATTACH_wrapper(struct mlx4_dev *dev, int slave,
+                                         struct mlx4_vhcr *vhcr,
+                                         struct mlx4_cmd_mailbox *inbox,
+                                         struct mlx4_cmd_mailbox *outbox,
+                                         struct mlx4_cmd_info *cmd)
+{
+        return mlx4_cmd_imm(dev, inbox->dma, &vhcr->out_param,
+                            vhcr->in_modifier, 0,
+                            MLX4_QP_FLOW_STEERING_ATTACH,
+                            MLX4_CMD_TIME_CLASS_A,
+                            MLX4_CMD_NATIVE);
+}
+
+int mlx4_QP_FLOW_STEERING_DETACH_wrapper(struct mlx4_dev *dev, int slave,
+                                         struct mlx4_vhcr *vhcr,
+                                         struct mlx4_cmd_mailbox *inbox,
+                                         struct mlx4_cmd_mailbox *outbox,
+                                         struct mlx4_cmd_info *cmd)
+{
+        return mlx4_cmd(dev, vhcr->in_param, 0, 0,
+                        MLX4_QP_FLOW_STEERING_DETACH, MLX4_CMD_TIME_CLASS_A,
+                        MLX4_CMD_NATIVE);
+}
+
 enum {
         BUSY_MAX_RETRIES = 10
 };
diff --git a/include/linux/mlx4/cmd.h b/include/linux/mlx4/cmd.h
index 1f3860a8a109..260695186256 100644
--- a/include/linux/mlx4/cmd.h
+++ b/include/linux/mlx4/cmd.h
@@ -154,6 +154,10 @@ enum {
         /* set port opcode modifiers */
         MLX4_SET_PORT_PRIO2TC = 0x8,
         MLX4_SET_PORT_SCHEDULER  = 0x9,
+
+        /* register/delete flow steering network rules */
+        MLX4_QP_FLOW_STEERING_ATTACH = 0x65,
+        MLX4_QP_FLOW_STEERING_DETACH = 0x66,
 };
 
 enum {