xref: /linux/drivers/gpu/drm/i915/i915_module.c (revision 6dfafbd0299a60bfb5d5e277fdf100037c7ded07)
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 
23 static 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 
53 static 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 };
80 static int init_progress;
81 
82 static 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 
111 static 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 
122 module_init(i915_init);
123 module_exit(i915_exit);
124 
125 MODULE_AUTHOR("Tungsten Graphics, Inc.");
126 MODULE_AUTHOR("Intel Corporation");
127 
128 MODULE_DESCRIPTION(DRIVER_DESC);
129 MODULE_LICENSE("GPL and additional rights");
130