LXR linux/drivers/gpu/drm/i915/i915

   1/*
   2 * SPDX-License-Identifier: MIT
   3 *
   4 * Copyright © 2021 Intel Corporation
   5 */
   6
   7#include <linux/console.h>
   8
   9#include "gem/i915_gem_context.h"
  10#include "gem/i915_gem_object.h"
  11#include "i915_active.h"
  12#include "i915_buddy.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
  21static int i915_check_nomodeset(void)
  22{
  23        bool use_kms = true;
  24
  25        /*
  26         * Enable KMS by default, unless explicitly overriden by
  27         * either the i915.modeset prarameter or by the
  28         * vga_text_mode_force boot option.
  29         */
  30
  31        if (i915_modparams.modeset == 0)
  32                use_kms = false;
  33
  34        if (vgacon_text_force() && i915_modparams.modeset == -1)
  35                use_kms = false;
  36
  37        if (!use_kms) {
  38                /* Silently fail loading to not upset userspace. */
  39                DRM_DEBUG_DRIVER("KMS disabled.\n");
  40                return 1;
  41        }
  42
  43        return 0;
  44}
  45
  46static const struct {
  47   int (*init)(void);
  48   void (*exit)(void);
  49} init_funcs[] = {
  50        { .init = i915_check_nomodeset },
  51        { .init = i915_active_module_init,
  52          .exit = i915_active_module_exit },
  53        { .init = i915_buddy_module_init,
  54          .exit = i915_buddy_module_exit },
  55        { .init = i915_context_module_init,
  56          .exit = i915_context_module_exit },
  57        { .init = i915_gem_context_module_init,
  58          .exit = i915_gem_context_module_exit },
  59        { .init = i915_objects_module_init,
  60          .exit = i915_objects_module_exit },
  61        { .init = i915_request_module_init,
  62          .exit = i915_request_module_exit },
  63        { .init = i915_scheduler_module_init,
  64          .exit = i915_scheduler_module_exit },
  65        { .init = i915_vma_module_init,
  66          .exit = i915_vma_module_exit },
  67        { .init = i915_mock_selftests },
  68        { .init = i915_pmu_init,
  69          .exit = i915_pmu_exit },
  70        { .init = i915_register_pci_driver,
  71          .exit = i915_unregister_pci_driver },
  72        { .init = i915_perf_sysctl_register,
  73          .exit = i915_perf_sysctl_unregister },
  74};
  75static int init_progress;
  76
  77static int __init i915_init(void)
  78{
  79        int err, i;
  80
  81        for (i = 0; i < ARRAY_SIZE(init_funcs); i++) {
  82                err = init_funcs[i].init();
  83                if (err < 0) {
  84                        while (i--) {
  85                                if (init_funcs[i].exit)
  86                                        init_funcs[i].exit();
  87                        }
  88                        return err;
  89                } else if (err > 0) {
  90                        /*
  91                         * Early-exit success is reserved for things which
  92                         * don't have an exit() function because we have no
  93                         * idea how far they got or how to partially tear
  94                         * them down.
  95                         */
  96                        WARN_ON(init_funcs[i].exit);
  97                        break;
  98                }
  99        }
 100
 101        init_progress = i;
 102
 103        return 0;
 104}
 105
 106static void __exit i915_exit(void)
 107{
 108        int i;
 109
 110        for (i = init_progress - 1; i >= 0; i--) {
 111                GEM_BUG_ON(i >= ARRAY_SIZE(init_funcs));
 112                if (init_funcs[i].exit)
 113                        init_funcs[i].exit();
 114        }
 115}
 116
 117module_init(i915_init);
 118module_exit(i915_exit);
 119
 120MODULE_AUTHOR("Tungsten Graphics, Inc.");
 121MODULE_AUTHOR("Intel Corporation");
 122
 123MODULE_DESCRIPTION(DRIVER_DESC);
 124MODULE_LICENSE("GPL and additional rights");
 125