Oded Gabbay
22136281cb
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
[ROCm/ROCR-Runtime commit: 94c0329fc4]
113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
/*
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* Copyright © 2014 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* 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 (including
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* the next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* 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 "libhsakmt.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "fmm.h"
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static const char kfd_device_name[] = "/dev/kfd";
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static const char tmp_file[] = "/var/lock/.amd_hsa_thunk_lock";
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int amd_hsa_thunk_lock_fd = 0;
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HSAKMT_STATUS
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HSAKMTAPI
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hsaKmtOpenKFD(void)
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{
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HSAKMT_STATUS result;
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pthread_mutex_lock(&hsakmt_mutex);
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if (kfd_open_count == 0)
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{
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int fd = open(kfd_device_name, O_RDWR | O_CLOEXEC);
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if (fd != -1)
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{
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kfd_fd = fd;
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kfd_open_count = 1;
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result = fmm_init_process_apertures();
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if (result != HSAKMT_STATUS_SUCCESS)
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close(fd);
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}
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else
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{
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result = HSAKMT_STATUS_KERNEL_IO_CHANNEL_NOT_OPENED;
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}
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amd_hsa_thunk_lock_fd = open(tmp_file,
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O_CREAT | //create the file if it's not present.
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O_RDWR, //only need write access for the internal locking semantics.
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S_IRUSR | S_IWUSR); //permissions on the file, 600 here.
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}
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else
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{
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kfd_open_count++;
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result = HSAKMT_STATUS_SUCCESS;
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}
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pthread_mutex_unlock(&hsakmt_mutex);
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return result;
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}
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HSAKMT_STATUS
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HSAKMTAPI
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hsaKmtCloseKFD(void)
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{
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HSAKMT_STATUS result;
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pthread_mutex_lock(&hsakmt_mutex);
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if (kfd_open_count > 0)
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{
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if (--kfd_open_count == 0)
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{
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close(kfd_fd);
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if (amd_hsa_thunk_lock_fd > 0) {
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close(amd_hsa_thunk_lock_fd);
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unlink(tmp_file);
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}
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}
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result = HSAKMT_STATUS_SUCCESS;
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}
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else
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{
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result = HSAKMT_STATUS_KERNEL_IO_CHANNEL_NOT_OPENED;
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}
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pthread_mutex_unlock(&hsakmt_mutex);
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return result;
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}
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