1/*
2 * SPDX-License-Identifier: MIT
3 *
4 * Copyright © 2021 Intel Corporation
5 */
6
7#include <drm/drm_drv.h>
8#include <drm/drm_print.h>
9
10#include "gem/i915_gem_context.h"
11#include "gem/i915_gem_object.h"
12#include "i915_active.h"
13#include "i915_driver.h"
14#include "i915_params.h"
15#include "i915_pci.h"
16#include "i915_perf.h"
17#include "i915_request.h"
18#include "i915_scheduler.h"
19#include "i915_selftest.h"
20#include "i915_vma.h"
21#include "i915_vma_resource.h"
22
23static int i915_check_nomodeset(void)
24{
25 bool use_kms = true;
26
27 /*
28 * Enable KMS by default, unless explicitly overridden by
29 * either the i915.modeset parameter or by the
30 * nomodeset boot option.
31 */
32
33 if (i915_modparams.modeset == 0)
34 pr_warn("i915.modeset=0 is deprecated. Please use the 'nomodeset' kernel parameter instead.\n");
35 else if (i915_modparams.modeset != -1)
36 pr_warn("i915.modeset=%d is deprecated. Please remove it and the 'nomodeset' kernel parameter instead.\n",
37 i915_modparams.modeset);
38
39 if (i915_modparams.modeset == 0)
40 use_kms = false;
41
42 if (drm_firmware_drivers_only() && i915_modparams.modeset == -1)
43 use_kms = false;
44
45 if (!use_kms) {
46 DRM_DEBUG_DRIVER("KMS disabled.\n");
47 return -ENODEV;
48 }
49
50 return 0;
51}
52
53static const struct {
54 int (*init)(void);
55 void (*exit)(void);
56} init_funcs[] = {
57 { .init = i915_check_nomodeset },
58 { .init = i915_active_module_init,
59 .exit = i915_active_module_exit },
60 { .init = i915_context_module_init,
61 .exit = i915_context_module_exit },
62 { .init = i915_gem_context_module_init,
63 .exit = i915_gem_context_module_exit },
64 { .init = i915_objects_module_init,
65 .exit = i915_objects_module_exit },
66 { .init = i915_request_module_init,
67 .exit = i915_request_module_exit },
68 { .init = i915_scheduler_module_init,
69 .exit = i915_scheduler_module_exit },
70 { .init = i915_vma_module_init,
71 .exit = i915_vma_module_exit },
72 { .init = i915_vma_resource_module_init,
73 .exit = i915_vma_resource_module_exit },
74 { .init = i915_mock_selftests },
75 { .init = i915_pci_register_driver,
76 .exit = i915_pci_unregister_driver },
77 { .init = i915_perf_sysctl_register,
78 .exit = i915_perf_sysctl_unregister },
79};
80static int init_progress;
81
82static int __init i915_init(void)
83{
84 int err, i;
85
86 for (i = 0; i < ARRAY_SIZE(init_funcs); i++) {
87 err = init_funcs[i].init();
88 if (err < 0) {
89 while (i--) {
90 if (init_funcs[i].exit)
91 init_funcs[i].exit();
92 }
93 return err;
94 } else if (err > 0) {
95 /*
96 * Early-exit success is reserved for things which
97 * don't have an exit() function because we have no
98 * idea how far they got or how to partially tear
99 * them down.
100 */
101 WARN_ON(init_funcs[i].exit);
102 break;
103 }
104 }
105
106 init_progress = i;
107
108 return 0;
109}
110
111static void __exit i915_exit(void)
112{
113 int i;
114
115 for (i = init_progress - 1; i >= 0; i--) {
116 GEM_BUG_ON(i >= ARRAY_SIZE(init_funcs));
117 if (init_funcs[i].exit)
118 init_funcs[i].exit();
119 }
120}
121
122module_init(i915_init);
123module_exit(i915_exit);
124
125MODULE_AUTHOR("Tungsten Graphics, Inc.");
126MODULE_AUTHOR("Intel Corporation");
127
128MODULE_DESCRIPTION(DRIVER_DESC);
129MODULE_LICENSE("GPL and additional rights");
130

source code of linux/drivers/gpu/drm/i915/i915_module.c