2 * Copyright 2014 Advanced Micro Devices, Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
23 #include <linux/module.h>
24 #include <linux/sched.h>
25 #include <linux/moduleparam.h>
26 #include <linux/device.h>
29 #define KFD_DRIVER_AUTHOR "AMD Inc. and others"
31 #define KFD_DRIVER_DESC "Standalone HSA driver for AMD's GPUs"
32 #define KFD_DRIVER_DATE "20141113"
33 #define KFD_DRIVER_MAJOR 0
34 #define KFD_DRIVER_MINOR 7
35 #define KFD_DRIVER_PATCHLEVEL 0
37 const struct kfd2kgd_calls *kfd2kgd;
38 static const struct kgd2kfd_calls kgd2kfd = {
40 .probe = kgd2kfd_probe,
41 .device_init = kgd2kfd_device_init,
42 .device_exit = kgd2kfd_device_exit,
43 .interrupt = kgd2kfd_interrupt,
44 .suspend = kgd2kfd_suspend,
45 .resume = kgd2kfd_resume,
48 int sched_policy = KFD_SCHED_POLICY_HWS;
49 module_param(sched_policy, int, 0444);
50 MODULE_PARM_DESC(sched_policy,
51 "Kernel cmdline parameter that defines the amdkfd scheduling policy");
53 int max_num_of_processes = KFD_MAX_NUM_OF_PROCESSES_DEFAULT;
54 module_param(max_num_of_processes, int, 0444);
55 MODULE_PARM_DESC(max_num_of_processes,
56 "Kernel cmdline parameter that defines the amdkfd maximum number of supported processes");
58 int max_num_of_queues_per_process = KFD_MAX_NUM_OF_QUEUES_PER_PROCESS_DEFAULT;
59 module_param(max_num_of_queues_per_process, int, 0444);
60 MODULE_PARM_DESC(max_num_of_queues_per_process,
61 "Kernel cmdline parameter that defines the amdkfd maximum number of supported queues per process");
63 bool kgd2kfd_init(unsigned interface_version,
64 const struct kfd2kgd_calls *f2g,
65 const struct kgd2kfd_calls **g2f)
68 * Only one interface version is supported,
69 * no kfd/kgd version skew allowed.
71 if (interface_version != KFD_INTERFACE_VERSION)
74 /* Protection against multiple amd kgd loads */
83 EXPORT_SYMBOL(kgd2kfd_init);
85 void kgd2kfd_exit(void)
89 static int __init kfd_module_init(void)
95 /* Verify module parameters */
96 if ((sched_policy < KFD_SCHED_POLICY_HWS) ||
97 (sched_policy > KFD_SCHED_POLICY_NO_HWS)) {
98 pr_err("kfd: sched_policy has invalid value\n");
102 /* Verify module parameters */
103 if ((max_num_of_processes < 0) ||
104 (max_num_of_processes > KFD_MAX_NUM_OF_PROCESSES)) {
105 pr_err("kfd: max_num_of_processes must be between 0 to KFD_MAX_NUM_OF_PROCESSES\n");
109 if ((max_num_of_queues_per_process < 0) ||
110 (max_num_of_queues_per_process >
111 KFD_MAX_NUM_OF_QUEUES_PER_PROCESS)) {
112 pr_err("kfd: max_num_of_queues_per_process must be between 0 to KFD_MAX_NUM_OF_QUEUES_PER_PROCESS\n");
116 err = kfd_pasid_init();
120 err = kfd_chardev_init();
124 err = kfd_topology_init();
128 kfd_process_create_wq();
130 dev_info(kfd_device, "Initialized module\n");
142 static void __exit kfd_module_exit(void)
144 kfd_process_destroy_wq();
145 kfd_topology_shutdown();
148 dev_info(kfd_device, "Removed module\n");
151 module_init(kfd_module_init);
152 module_exit(kfd_module_exit);
154 MODULE_AUTHOR(KFD_DRIVER_AUTHOR);
155 MODULE_DESCRIPTION(KFD_DRIVER_DESC);
156 MODULE_LICENSE("GPL and additional rights");
157 MODULE_VERSION(__stringify(KFD_DRIVER_MAJOR) "."
158 __stringify(KFD_DRIVER_MINOR) "."
159 __stringify(KFD_DRIVER_PATCHLEVEL));