1 /* $NetBSD: amdgpu_module.c,v 1.11 2022/07/23 12:52:09 riastradh Exp $ */
2
3 /*-
4 * Copyright (c) 2018 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Taylor R. Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: amdgpu_module.c,v 1.11 2022/07/23 12:52:09 riastradh Exp $");
34
35 #include <sys/types.h>
36 #include <sys/module.h>
37 #ifndef _MODULE
38 #include <sys/once.h>
39 #endif
40 #include <sys/systm.h>
41
42 #include <drm/drm_device.h>
43 #include <drm/drm_drv.h>
44 #include <drm/drm_sysctl.h>
45
46 #include <linux/idr.h>
47 #include <linux/mutex.h>
48
49 #include "amdgpu.h"
50 #include "amdgpu_amdkfd.h"
51 #include "amdgpu_drv.h"
52
53 MODULE(MODULE_CLASS_DRIVER, amdgpu, "drmkms,drmkms_pci,drmkms_sched,drmkms_ttm"); /* XXX drmkms_i2c */
54
55 #ifdef _MODULE
56 #include "ioconf.c"
57 #endif
58
59 /* XXX Kludge to get these from amdgpu_drv.c. */
60 extern struct drm_driver *const amdgpu_drm_driver;
61 extern struct amdgpu_mgpu_info mgpu_info;
62
63 /* XXX Kludge to replace DEFINE_IDA in amdgpu_ids.c. */
64 extern struct ida amdgpu_pasid_ida;
65
66 struct drm_sysctl_def amdgpu_def = DRM_SYSCTL_INIT();
67
68 static int
amdgpu_init(void)69 amdgpu_init(void)
70 {
71 int error;
72
73 error = drm_guarantee_initialized();
74 if (error)
75 return error;
76
77 amdgpu_drm_driver->num_ioctls = amdgpu_max_kms_ioctl;
78 amdgpu_drm_driver->driver_features &= ~DRIVER_ATOMIC;
79
80 linux_mutex_init(&mgpu_info.mutex);
81 ida_init(&amdgpu_pasid_ida);
82
83 error = amdgpu_sync_init();
84 KASSERT(error == 0);
85 error = amdgpu_fence_slab_init();
86 KASSERT(error == 0);
87
88 #if notyet /* XXX amdgpu acpi */
89 amdgpu_register_atpx_handler();
90 #endif
91
92 amdgpu_amdkfd_init();
93 drm_sysctl_init(&amdgpu_def);
94
95 return 0;
96 }
97
98 int amdgpu_guarantee_initialized(void); /* XXX */
99 int
amdgpu_guarantee_initialized(void)100 amdgpu_guarantee_initialized(void)
101 {
102 #ifdef _MODULE
103 return 0;
104 #else
105 static ONCE_DECL(amdgpu_init_once);
106
107 return RUN_ONCE(&amdgpu_init_once, &amdgpu_init);
108 #endif
109 }
110
111 static void
amdgpu_fini(void)112 amdgpu_fini(void)
113 {
114
115 drm_sysctl_fini(&amdgpu_def);
116 amdgpu_amdkfd_fini();
117 #if notyet /* XXX amdgpu acpi */
118 amdgpu_unregister_atpx_handler();
119 #endif
120 amdgpu_fence_slab_fini();
121 amdgpu_sync_fini();
122
123 ida_destroy(&amdgpu_pasid_ida);
124 linux_mutex_destroy(&mgpu_info.mutex);
125 }
126
127 static int
amdgpu_modcmd(modcmd_t cmd,void * arg __unused)128 amdgpu_modcmd(modcmd_t cmd, void *arg __unused)
129 {
130 int error;
131
132 switch (cmd) {
133 case MODULE_CMD_INIT:
134 /* XXX Kludge it up... Must happen before attachment. */
135 #ifdef _MODULE
136 error = amdgpu_init();
137 #else
138 error = amdgpu_guarantee_initialized();
139 #endif
140 if (error) {
141 aprint_error("amdgpu: failed to initialize: %d\n",
142 error);
143 return error;
144 }
145 #ifdef _MODULE
146 error = config_init_component(cfdriver_ioconf_amdgpu,
147 cfattach_ioconf_amdgpu, cfdata_ioconf_amdgpu);
148 if (error) {
149 aprint_error("amdgpu: failed to init component"
150 ": %d\n", error);
151 amdgpu_fini();
152 return error;
153 }
154 #endif
155 return 0;
156
157 case MODULE_CMD_FINI:
158 #ifdef _MODULE
159 error = config_fini_component(cfdriver_ioconf_amdgpu,
160 cfattach_ioconf_amdgpu, cfdata_ioconf_amdgpu);
161 if (error) {
162 aprint_error("amdgpu: failed to fini component"
163 ": %d\n", error);
164 return error;
165 }
166 #endif
167 amdgpu_fini();
168 return 0;
169
170 default:
171 return ENOTTY;
172 }
173 }
174