mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
a8b92ca1b0
Introduce DEVX to enable direct device commands in downstream patches from this series. In that mode of work the firmware manages the isolation between processes' resources and as such a DEVX user id is created and assigned to the given user context upon allocation request. A capability check is done to make sure that this feature is really supported by the firmware prior to creating the DEVX user id. Signed-off-by: Yishai Hadas <yishaih@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
|
|
/*
|
|
* Copyright (c) 2018, Mellanox Technologies inc. All rights reserved.
|
|
*/
|
|
|
|
#include <rdma/ib_user_verbs.h>
|
|
#include <rdma/ib_verbs.h>
|
|
#include <rdma/uverbs_types.h>
|
|
#include <rdma/uverbs_ioctl.h>
|
|
#include <rdma/mlx5_user_ioctl_cmds.h>
|
|
#include <rdma/ib_umem.h>
|
|
#include <linux/mlx5/driver.h>
|
|
#include <linux/mlx5/fs.h>
|
|
#include "mlx5_ib.h"
|
|
|
|
int mlx5_ib_devx_create(struct mlx5_ib_dev *dev, struct mlx5_ib_ucontext *context)
|
|
{
|
|
u32 in[MLX5_ST_SZ_DW(create_uctx_in)] = {0};
|
|
u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {0};
|
|
u64 general_obj_types;
|
|
void *uctx;
|
|
void *hdr;
|
|
int err;
|
|
|
|
uctx = MLX5_ADDR_OF(create_uctx_in, in, uctx);
|
|
hdr = MLX5_ADDR_OF(create_uctx_in, in, hdr);
|
|
|
|
general_obj_types = MLX5_CAP_GEN_64(dev->mdev, general_obj_types);
|
|
if (!(general_obj_types & MLX5_GENERAL_OBJ_TYPES_CAP_UCTX) ||
|
|
!(general_obj_types & MLX5_GENERAL_OBJ_TYPES_CAP_UMEM))
|
|
return -EINVAL;
|
|
|
|
if (!capable(CAP_NET_RAW))
|
|
return -EPERM;
|
|
|
|
MLX5_SET(general_obj_in_cmd_hdr, hdr, opcode, MLX5_CMD_OP_CREATE_GENERAL_OBJECT);
|
|
MLX5_SET(general_obj_in_cmd_hdr, hdr, obj_type, MLX5_OBJ_TYPE_UCTX);
|
|
|
|
err = mlx5_cmd_exec(dev->mdev, in, sizeof(in), out, sizeof(out));
|
|
if (err)
|
|
return err;
|
|
|
|
context->devx_uid = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
|
|
return 0;
|
|
}
|
|
|
|
void mlx5_ib_devx_destroy(struct mlx5_ib_dev *dev,
|
|
struct mlx5_ib_ucontext *context)
|
|
{
|
|
u32 in[MLX5_ST_SZ_DW(general_obj_in_cmd_hdr)] = {0};
|
|
u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {0};
|
|
|
|
MLX5_SET(general_obj_in_cmd_hdr, in, opcode, MLX5_CMD_OP_DESTROY_GENERAL_OBJECT);
|
|
MLX5_SET(general_obj_in_cmd_hdr, in, obj_type, MLX5_OBJ_TYPE_UCTX);
|
|
MLX5_SET(general_obj_in_cmd_hdr, in, obj_id, context->devx_uid);
|
|
|
|
mlx5_cmd_exec(dev->mdev, in, sizeof(in), out, sizeof(out));
|
|
}
|