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		pr_warn("i915.modeset=0 is deprecated. Please use the 'nomodeset' kernel parameter instead.\n");
 34	else if (i915_modparams.modeset != -1)
 35		pr_warn("i915.modeset=%d is deprecated. Please remove it and the 'nomodeset' kernel parameter instead.\n",
 36			i915_modparams.modeset);
 37
 38	if (i915_modparams.modeset == 0)
 39		use_kms = false;
 40
 41	if (drm_firmware_drivers_only() && i915_modparams.modeset == -1)
 42		use_kms = false;
 43
 44	if (!use_kms) {
 45		DRM_DEBUG_DRIVER("KMS disabled.\n");
 46		return -ENODEV;
 47	}
 48
 49	return 0;
 50}
 51
 52static const struct {
 53   int (*init)(void);
 54   void (*exit)(void);
 55} init_funcs[] = {
 56	{ .init = i915_check_nomodeset },
 57	{ .init = i915_active_module_init,
 58	  .exit = i915_active_module_exit },
 59	{ .init = i915_context_module_init,
 60	  .exit = i915_context_module_exit },
 61	{ .init = i915_gem_context_module_init,
 62	  .exit = i915_gem_context_module_exit },
 63	{ .init = i915_objects_module_init,
 64	  .exit = i915_objects_module_exit },
 65	{ .init = i915_request_module_init,
 66	  .exit = i915_request_module_exit },
 67	{ .init = i915_scheduler_module_init,
 68	  .exit = i915_scheduler_module_exit },
 69	{ .init = i915_vma_module_init,
 70	  .exit = i915_vma_module_exit },
 71	{ .init = i915_vma_resource_module_init,
 72	  .exit = i915_vma_resource_module_exit },
 73	{ .init = i915_mock_selftests },
 74	{ .init = i915_pmu_init,
 75	  .exit = i915_pmu_exit },
 76	{ .init = i915_pci_register_driver,
 77	  .exit = i915_pci_unregister_driver },
 78	{ .init = i915_perf_sysctl_register,
 79	  .exit = i915_perf_sysctl_unregister },
 80};
 81static int init_progress;
 82
 83static int __init i915_init(void)
 84{
 85	int err, i;
 86
 87	for (i = 0; i < ARRAY_SIZE(init_funcs); i++) {
 88		err = init_funcs[i].init();
 89		if (err < 0) {
 90			while (i--) {
 91				if (init_funcs[i].exit)
 92					init_funcs[i].exit();
 93			}
 94			return err;
 95		} else if (err > 0) {
 96			/*
 97			 * Early-exit success is reserved for things which
 98			 * don't have an exit() function because we have no
 99			 * idea how far they got or how to partially tear
100			 * them down.
101			 */
102			WARN_ON(init_funcs[i].exit);
103			break;
104		}
105	}
106
107	init_progress = i;
108
109	return 0;
110}
111
112static void __exit i915_exit(void)
113{
114	int i;
115
116	for (i = init_progress - 1; i >= 0; i--) {
117		GEM_BUG_ON(i >= ARRAY_SIZE(init_funcs));
118		if (init_funcs[i].exit)
119			init_funcs[i].exit();
120	}
121}
122
123module_init(i915_init);
124module_exit(i915_exit);
125
126MODULE_AUTHOR("Tungsten Graphics, Inc.");
127MODULE_AUTHOR("Intel Corporation");
128
129MODULE_DESCRIPTION(DRIVER_DESC);
130MODULE_LICENSE("GPL and additional rights");