1 /*
2 * Copyright 2014 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 */
22
23 #include <linux/module.h>
24 #include <linux/sched.h>
25 #include <linux/moduleparam.h>
26 #include <linux/device.h>
27 #include "kfd_priv.h"
28
29 #define KFD_DRIVER_AUTHOR "AMD Inc. and others"
30
31 #define KFD_DRIVER_DESC "Standalone HSA driver for AMD's GPUs"
32 #define KFD_DRIVER_DATE "20150122"
33 #define KFD_DRIVER_MAJOR 0
34 #define KFD_DRIVER_MINOR 7
35 #define KFD_DRIVER_PATCHLEVEL 1
36
37 static const struct kgd2kfd_calls kgd2kfd = {
38 .exit = kgd2kfd_exit,
39 .probe = kgd2kfd_probe,
40 .device_init = kgd2kfd_device_init,
41 .device_exit = kgd2kfd_device_exit,
42 .interrupt = kgd2kfd_interrupt,
43 .suspend = kgd2kfd_suspend,
44 .resume = kgd2kfd_resume,
45 };
46
47 int sched_policy = KFD_SCHED_POLICY_HWS;
48 module_param(sched_policy, int, 0444);
49 MODULE_PARM_DESC(sched_policy,
50 "Scheduling policy (0 = HWS (Default), 1 = HWS without over-subscription, 2 = Non-HWS (Used for debugging only)");
51
52 int max_num_of_queues_per_device = KFD_MAX_NUM_OF_QUEUES_PER_DEVICE_DEFAULT;
53 module_param(max_num_of_queues_per_device, int, 0444);
54 MODULE_PARM_DESC(max_num_of_queues_per_device,
55 "Maximum number of supported queues per device (1 = Minimum, 4096 = default)");
56
kgd2kfd_init(unsigned interface_version,const struct kgd2kfd_calls ** g2f)57 bool kgd2kfd_init(unsigned interface_version, const struct kgd2kfd_calls **g2f)
58 {
59 /*
60 * Only one interface version is supported,
61 * no kfd/kgd version skew allowed.
62 */
63 if (interface_version != KFD_INTERFACE_VERSION)
64 return false;
65
66 *g2f = &kgd2kfd;
67
68 return true;
69 }
70 EXPORT_SYMBOL(kgd2kfd_init);
71
kgd2kfd_exit(void)72 void kgd2kfd_exit(void)
73 {
74 }
75
kfd_module_init(void)76 static int __init kfd_module_init(void)
77 {
78 int err;
79
80 /* Verify module parameters */
81 if ((sched_policy < KFD_SCHED_POLICY_HWS) ||
82 (sched_policy > KFD_SCHED_POLICY_NO_HWS)) {
83 pr_err("kfd: sched_policy has invalid value\n");
84 return -1;
85 }
86
87 /* Verify module parameters */
88 if ((max_num_of_queues_per_device < 1) ||
89 (max_num_of_queues_per_device >
90 KFD_MAX_NUM_OF_QUEUES_PER_DEVICE)) {
91 pr_err("kfd: max_num_of_queues_per_device must be between 1 to KFD_MAX_NUM_OF_QUEUES_PER_DEVICE\n");
92 return -1;
93 }
94
95 err = kfd_pasid_init();
96 if (err < 0)
97 goto err_pasid;
98
99 err = kfd_chardev_init();
100 if (err < 0)
101 goto err_ioctl;
102
103 err = kfd_topology_init();
104 if (err < 0)
105 goto err_topology;
106
107 kfd_process_create_wq();
108
109 dev_info(kfd_device, "Initialized module\n");
110
111 return 0;
112
113 err_topology:
114 kfd_chardev_exit();
115 err_ioctl:
116 kfd_pasid_exit();
117 err_pasid:
118 return err;
119 }
120
kfd_module_exit(void)121 static void __exit kfd_module_exit(void)
122 {
123 kfd_process_destroy_wq();
124 kfd_topology_shutdown();
125 kfd_chardev_exit();
126 kfd_pasid_exit();
127 dev_info(kfd_device, "Removed module\n");
128 }
129
130 module_init(kfd_module_init);
131 module_exit(kfd_module_exit);
132
133 MODULE_AUTHOR(KFD_DRIVER_AUTHOR);
134 MODULE_DESCRIPTION(KFD_DRIVER_DESC);
135 MODULE_LICENSE("GPL and additional rights");
136 MODULE_VERSION(__stringify(KFD_DRIVER_MAJOR) "."
137 __stringify(KFD_DRIVER_MINOR) "."
138 __stringify(KFD_DRIVER_PATCHLEVEL));
139