i915_module.c

  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");