cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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kfd_module.c (2550B)

      1// SPDX-License-Identifier: GPL-2.0 OR MIT
      2/*
      3 * Copyright 2014-2022 Advanced Micro Devices, Inc.
      4 *
      5 * Permission is hereby granted, free of charge, to any person obtaining a
      6 * copy of this software and associated documentation files (the "Software"),
      7 * to deal in the Software without restriction, including without limitation
      8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      9 * and/or sell copies of the Software, and to permit persons to whom the
     10 * Software is furnished to do so, subject to the following conditions:
     11 *
     12 * The above copyright notice and this permission notice shall be included in
     13 * all copies or substantial portions of the Software.
     14 *
     15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     21 * OTHER DEALINGS IN THE SOFTWARE.
     22 */
     23
     24#include <linux/sched.h>
     25#include <linux/device.h>
     26#include "kfd_priv.h"
     27#include "amdgpu_amdkfd.h"
     28
     29static int kfd_init(void)
     30{
     31	int err;
     32
     33	/* Verify module parameters */
     34	if ((sched_policy < KFD_SCHED_POLICY_HWS) ||
     35		(sched_policy > KFD_SCHED_POLICY_NO_HWS)) {
     36		pr_err("sched_policy has invalid value\n");
     37		return -EINVAL;
     38	}
     39
     40	/* Verify module parameters */
     41	if ((max_num_of_queues_per_device < 1) ||
     42		(max_num_of_queues_per_device >
     43			KFD_MAX_NUM_OF_QUEUES_PER_DEVICE)) {
     44		pr_err("max_num_of_queues_per_device must be between 1 to KFD_MAX_NUM_OF_QUEUES_PER_DEVICE\n");
     45		return -EINVAL;
     46	}
     47
     48	err = kfd_chardev_init();
     49	if (err < 0)
     50		goto err_ioctl;
     51
     52	err = kfd_topology_init();
     53	if (err < 0)
     54		goto err_topology;
     55
     56	err = kfd_process_create_wq();
     57	if (err < 0)
     58		goto err_create_wq;
     59
     60	/* Ignore the return value, so that we can continue
     61	 * to init the KFD, even if procfs isn't craated
     62	 */
     63	kfd_procfs_init();
     64
     65	kfd_debugfs_init();
     66
     67	return 0;
     68
     69err_create_wq:
     70	kfd_topology_shutdown();
     71err_topology:
     72	kfd_chardev_exit();
     73err_ioctl:
     74	pr_err("KFD is disabled due to module initialization failure\n");
     75	return err;
     76}
     77
     78static void kfd_exit(void)
     79{
     80	kfd_debugfs_fini();
     81	kfd_process_destroy_wq();
     82	kfd_procfs_shutdown();
     83	kfd_topology_shutdown();
     84	kfd_chardev_exit();
     85}
     86
     87int kgd2kfd_init(void)
     88{
     89	return kfd_init();
     90}
     91
     92void kgd2kfd_exit(void)
     93{
     94	kfd_exit();
     95}