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 
29 static 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 
69 err_create_wq:
70 	kfd_topology_shutdown();
71 err_topology:
72 	kfd_chardev_exit();
73 err_ioctl:
74 	pr_err("KFD is disabled due to module initialization failure\n");
75 	return err;
76 }
77 
78 static void kfd_exit(void)
79 {
80 	kfd_cleanup_processes();
81 	kfd_debugfs_fini();
82 	kfd_process_destroy_wq();
83 	kfd_procfs_shutdown();
84 	kfd_topology_shutdown();
85 	kfd_chardev_exit();
86 }
87 
88 int kgd2kfd_init(void)
89 {
90 	return kfd_init();
91 }
92 
93 void kgd2kfd_exit(void)
94 {
95 	kfd_exit();
96 }
97