IB/mlx5: Add CREATE_PSV/DESTROY_PSV for devx interface

Limit the number of PSV's created through devx to 1, to create a symmetry
between create/destroy cmds. In the kernel, one can create up to 4 PSV's
using CREATE_PSV cmd but the destruction is one by one. Add a protection
for this a-symmetric definition for devx.

Link: https://lore.kernel.org/r/20190723070412.6385-1-leon@kernel.org
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c
index ec4370f9938127f94d70533f2ebf8cc9f44b48a2..a527cf7f01ac965b566e6ddbc88b1d713f152bc8 100644 (file)
--- a/drivers/infiniband/hw/mlx5/devx.c
+++ b/drivers/infiniband/hw/mlx5/devx.c
@@ -776,6 +776,14 @@ static bool devx_is_obj_create_cmd(const void *in, u16 *opcode)
                        return true;
                return false;
        }
+       case MLX5_CMD_OP_CREATE_PSV:
+       {
+               u8 num_psv = MLX5_GET(create_psv_in, in, num_psv);
+
+               if (num_psv == 1)
+                       return true;
+               return false;
+       }
        default:
                return false;
        }
@@ -1215,6 +1223,12 @@ static void devx_obj_build_destroy_cmd(void *in, void *out, void *din,
        case MLX5_CMD_OP_ALLOC_XRCD:
                MLX5_SET(general_obj_in_cmd_hdr, din, opcode, MLX5_CMD_OP_DEALLOC_XRCD);
                break;
+       case MLX5_CMD_OP_CREATE_PSV:
+               MLX5_SET(general_obj_in_cmd_hdr, din, opcode,
+                        MLX5_CMD_OP_DESTROY_PSV);
+               MLX5_SET(destroy_psv_in, din, psvn,
+                        MLX5_GET(create_psv_out, out, psv0_index));
+               break;
        default:
                /* The entry must match to one of the devx_is_obj_create_cmd */
                WARN_ON(true);