net/mlx5_core: Add transport domain alloc/dealloc support

Each transport object, namely TIR and TIS, must have a transport domain
number (TDN) identifier.

The driver wrongly assumed that it is OK to use TDN=0 without explicit
TDN allocation from the device.

The TDN will also be used for isolating different processes once user
mode Ethernet will be supported.

Signed-off-by: Achiad Shochat <achiad@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/transobj.c b/drivers/net/ethernet/mellanox/mlx5/core/transobj.c
index 7a12028..8d98b03 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/transobj.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/transobj.c
@@ -34,6 +34,41 @@
 #include "mlx5_core.h"
 #include "transobj.h"
 
+int mlx5_alloc_transport_domain(struct mlx5_core_dev *dev, u32 *tdn)
+{
+       u32 in[MLX5_ST_SZ_DW(alloc_transport_domain_in)];
+       u32 out[MLX5_ST_SZ_DW(alloc_transport_domain_out)];
+       int err;
+
+       memset(in, 0, sizeof(in));
+       memset(out, 0, sizeof(out));
+
+       MLX5_SET(alloc_transport_domain_in, in, opcode,
+                MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN);
+
+       err = mlx5_cmd_exec_check_status(dev, in, sizeof(in), out, sizeof(out));
+       if (!err)
+               *tdn = MLX5_GET(alloc_transport_domain_out, out,
+                               transport_domain);
+
+       return err;
+}
+
+void mlx5_dealloc_transport_domain(struct mlx5_core_dev *dev, u32 tdn)
+{
+       u32 in[MLX5_ST_SZ_DW(dealloc_transport_domain_in)];
+       u32 out[MLX5_ST_SZ_DW(dealloc_transport_domain_out)];
+
+       memset(in, 0, sizeof(in));
+       memset(out, 0, sizeof(out));
+
+       MLX5_SET(dealloc_transport_domain_in, in, opcode,
+                MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN);
+       MLX5_SET(dealloc_transport_domain_in, in, transport_domain, tdn);
+
+       mlx5_cmd_exec_check_status(dev, in, sizeof(in), out, sizeof(out));
+}
+
 int mlx5_core_create_rq(struct mlx5_core_dev *dev, u32 *in, int inlen, u32 *rqn)
 {
        u32 out[MLX5_ST_SZ_DW(create_rq_out)];

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/transobj.h b/drivers/net/ethernet/mellanox/mlx5/core/transobj.h
index 90322c1..f9ef244 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/transobj.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/transobj.h
@@ -33,6 +33,8 @@
 #ifndef __TRANSOBJ_H__
 #define __TRANSOBJ_H__
 
+int mlx5_alloc_transport_domain(struct mlx5_core_dev *dev, u32 *tdn);
+void mlx5_dealloc_transport_domain(struct mlx5_core_dev *dev, u32 tdn);
 int mlx5_core_create_rq(struct mlx5_core_dev *dev, u32 *in, int inlen,
                        u32 *rqn);
 int mlx5_core_modify_rq(struct mlx5_core_dev *dev, u32 rqn, u32 *in, int inlen);