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
37static 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
47int sched_policy = KFD_SCHED_POLICY_HWS;
48module_param(sched_policy, int, 0444);
49MODULE_PARM_DESC(sched_policy,
50	"Scheduling policy (0 = HWS (Default), 1 = HWS without over-subscription, 2 = Non-HWS (Used for debugging only)");
51
52int max_num_of_queues_per_device = KFD_MAX_NUM_OF_QUEUES_PER_DEVICE_DEFAULT;
53module_param(max_num_of_queues_per_device, int, 0444);
54MODULE_PARM_DESC(max_num_of_queues_per_device,
55	"Maximum number of supported queues per device (1 = Minimum, 4096 = default)");
56
57bool 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}
70EXPORT_SYMBOL(kgd2kfd_init);
71
72void kgd2kfd_exit(void)
73{
74}
75
76static 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
113err_topology:
114	kfd_chardev_exit();
115err_ioctl:
116	kfd_pasid_exit();
117err_pasid:
118	return err;
119}
120
121static 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
130module_init(kfd_module_init);
131module_exit(kfd_module_exit);
132
133MODULE_AUTHOR(KFD_DRIVER_AUTHOR);
134MODULE_DESCRIPTION(KFD_DRIVER_DESC);
135MODULE_LICENSE("GPL and additional rights");
136MODULE_VERSION(__stringify(KFD_DRIVER_MAJOR) "."
137	       __stringify(KFD_DRIVER_MINOR) "."
138	       __stringify(KFD_DRIVER_PATCHLEVEL));
139