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
 22static 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
 47static 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};
 76static int init_progress;
 77
 78static 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
107static 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
118module_init(i915_init);
119module_exit(i915_exit);
120
121MODULE_AUTHOR("Tungsten Graphics, Inc.");
122MODULE_AUTHOR("Intel Corporation");
123
124MODULE_DESCRIPTION(DRIVER_DESC);
125MODULE_LICENSE("GPL and additional rights");