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