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/*
* SPDX-FileCopyrightText: Copyright (c) 2019 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "nvlink_os.h"
#include "nvlink_linux.h"
#include "nvlink_caps.h"
#include "nv-caps.h"
#define NVLINK_CAP_FABRIC_MGMT "fabric-mgmt"
typedef struct
{
nv_cap_t *root;
nv_cap_t *fabric_mgmt;
} nvlink_caps_t;
static nvlink_caps_t nvlink_caps = {0};
int nvlink_cap_acquire(int fd, NvU32 type)
{
int dup_fd = -1;
if (fd < 0)
{
return -1;
}
switch(type)
{
case NVLINK_CAP_FABRIC_MANAGEMENT:
{
dup_fd = nv_cap_validate_and_dup_fd(nvlink_caps.fabric_mgmt, fd);
if (dup_fd < 0)
{
nvlink_print(NVLINK_DBG_ERRORS,
"Failed to validate the fabric mgmt capability\n");
return -1;
}
break;
}
default:
{
nvlink_print(NVLINK_DBG_ERRORS, "Unknown capability specified\n");
return -1;
}
}
return dup_fd;
}
void nvlink_cap_release(int fd)
{
if (fd < 0)
{
return;
}
nv_cap_close_fd(fd);
}
void nvlink_cap_exit(void)
{
if (nvlink_caps.fabric_mgmt != NULL)
{
nv_cap_destroy_entry(nvlink_caps.fabric_mgmt);
nvlink_caps.fabric_mgmt = NULL;
}
if (nvlink_caps.root != NULL)
{
nv_cap_destroy_entry(nvlink_caps.root);
nvlink_caps.root = NULL;
}
}
int nvlink_cap_init(const char *path)
{
if (path == NULL)
{
nvlink_print(NVLINK_DBG_ERRORS, "Invalid path: %s\n", path);
return -1;
}
nvlink_caps.root = nv_cap_init(path);
if (nvlink_caps.root == NULL)
{
nvlink_print(NVLINK_DBG_ERRORS, "Failed to initialize capabilities\n");
return -1;
}
nvlink_caps.fabric_mgmt = nv_cap_create_file_entry(nvlink_caps.root,
NVLINK_CAP_FABRIC_MGMT,
S_IRUSR);
if (nvlink_caps.fabric_mgmt == NULL)
{
nvlink_print(NVLINK_DBG_ERRORS, "Failed to create fabric-mgmt entry\n");
nvlink_cap_exit();
return -1;
}
return 0;
}
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