1 /*
2  * SPDX-License-Identifier: MIT
3  *
4  * Copyright © 2021 Intel Corporation
5  */
6 
7 #include <drm/drm_drv.h>
8 
9 #include "gem/i915_gem_context.h"
10 #include "gem/i915_gem_object.h"
11 #include "i915_active.h"
12 #include "i915_driver.h"
13 #include "i915_params.h"
14 #include "i915_pci.h"
15 #include "i915_perf.h"
16 #include "i915_request.h"
17 #include "i915_scheduler.h"
18 #include "i915_selftest.h"
19 #include "i915_vma.h"
20 #include "i915_vma_resource.h"
21 
i915_check_nomodeset(void)22 static int i915_check_nomodeset(void)
23 {
24 	bool use_kms = true;
25 
26 	/*
27 	 * Enable KMS by default, unless explicitly overriden by
28 	 * either the i915.modeset parameter or by the
29 	 * nomodeset boot option.
30 	 */
31 
32 	if (i915_modparams.modeset == 0)
33 		use_kms = false;
34 
35 	if (drm_firmware_drivers_only() && i915_modparams.modeset == -1)
36 		use_kms = false;
37 
38 	if (!use_kms) {
39 		/* Silently fail loading to not upset userspace. */
40 		DRM_DEBUG_DRIVER("KMS disabled.\n");
41 		return 1;
42 	}
43 
44 	return 0;
45 }
46 
47 static const struct {
48    int (*init)(void);
49    void (*exit)(void);
50 } init_funcs[] = {
51 	{ .init = i915_check_nomodeset },
52 	{ .init = i915_active_module_init,
53 	  .exit = i915_active_module_exit },
54 	{ .init = i915_context_module_init,
55 	  .exit = i915_context_module_exit },
56 	{ .init = i915_gem_context_module_init,
57 	  .exit = i915_gem_context_module_exit },
58 	{ .init = i915_objects_module_init,
59 	  .exit = i915_objects_module_exit },
60 	{ .init = i915_request_module_init,
61 	  .exit = i915_request_module_exit },
62 	{ .init = i915_scheduler_module_init,
63 	  .exit = i915_scheduler_module_exit },
64 	{ .init = i915_vma_module_init,
65 	  .exit = i915_vma_module_exit },
66 	{ .init = i915_vma_resource_module_init,
67 	  .exit = i915_vma_resource_module_exit },
68 	{ .init = i915_mock_selftests },
69 	{ .init = i915_pmu_init,
70 	  .exit = i915_pmu_exit },
71 	{ .init = i915_pci_register_driver,
72 	  .exit = i915_pci_unregister_driver },
73 	{ .init = i915_perf_sysctl_register,
74 	  .exit = i915_perf_sysctl_unregister },
75 };
76 static int init_progress;
77 
i915_init(void)78 static int __init i915_init(void)
79 {
80 	int err, i;
81 
82 	for (i = 0; i < ARRAY_SIZE(init_funcs); i++) {
83 		err = init_funcs[i].init();
84 		if (err < 0) {
85 			while (i--) {
86 				if (init_funcs[i].exit)
87 					init_funcs[i].exit();
88 			}
89 			return err;
90 		} else if (err > 0) {
91 			/*
92 			 * Early-exit success is reserved for things which
93 			 * don't have an exit() function because we have no
94 			 * idea how far they got or how to partially tear
95 			 * them down.
96 			 */
97 			WARN_ON(init_funcs[i].exit);
98 			break;
99 		}
100 	}
101 
102 	init_progress = i;
103 
104 	return 0;
105 }
106 
i915_exit(void)107 static void __exit i915_exit(void)
108 {
109 	int i;
110 
111 	for (i = init_progress - 1; i >= 0; i--) {
112 		GEM_BUG_ON(i >= ARRAY_SIZE(init_funcs));
113 		if (init_funcs[i].exit)
114 			init_funcs[i].exit();
115 	}
116 }
117 
118 module_init(i915_init);
119 module_exit(i915_exit);
120 
121 MODULE_AUTHOR("Tungsten Graphics, Inc.");
122 MODULE_AUTHOR("Intel Corporation");
123 
124 MODULE_DESCRIPTION(DRIVER_DESC);
125 MODULE_LICENSE("GPL and additional rights");
126