/*
 * SPDX-License-Identifier: MIT
 *
 * Copyright © 2021 Intel Corporation
 */

#include <drm/drm_drv.h>
#include <drm/drm_print.h>

#include "gem/i915_gem_context.h"
#include "gem/i915_gem_object.h"
#include "i915_active.h"
#include "i915_driver.h"
#include "i915_params.h"
#include "i915_pci.h"
#include "i915_perf.h"
#include "i915_request.h"
#include "i915_scheduler.h"
#include "i915_selftest.h"
#include "i915_vma.h"
#include "i915_vma_resource.h"

static int i915_check_nomodeset(void)
{
        bool use_kms = true;

        /*
         * Enable KMS by default, unless explicitly overridden by
         * either the i915.modeset parameter or by the
         * nomodeset boot option.
         */

        if (i915_modparams.modeset == 0)
                pr_warn("i915.modeset=0 is deprecated. Please use the 'nomodeset' kernel parameter instead.\n");
        else if (i915_modparams.modeset != -1)
                pr_warn("i915.modeset=%d is deprecated. Please remove it and the 'nomodeset' kernel parameter instead.\n",
                        i915_modparams.modeset);

        if (i915_modparams.modeset == 0)
                use_kms = false;

        if (drm_firmware_drivers_only() && i915_modparams.modeset == -1)
                use_kms = false;

        if (!use_kms) {
                DRM_DEBUG_DRIVER("KMS disabled.\n");
                return -ENODEV;
        }

        return 0;
}

static const struct {
   int (*init)(void);
   void (*exit)(void);
} init_funcs[] = {
        { .init = i915_check_nomodeset },
        { .init = i915_active_module_init,
          .exit = i915_active_module_exit },
        { .init = i915_context_module_init,
          .exit = i915_context_module_exit },
        { .init = i915_gem_context_module_init,
          .exit = i915_gem_context_module_exit },
        { .init = i915_objects_module_init,
          .exit = i915_objects_module_exit },
        { .init = i915_request_module_init,
          .exit = i915_request_module_exit },
        { .init = i915_scheduler_module_init,
          .exit = i915_scheduler_module_exit },
        { .init = i915_vma_module_init,
          .exit = i915_vma_module_exit },
        { .init = i915_vma_resource_module_init,
          .exit = i915_vma_resource_module_exit },
        { .init = i915_mock_selftests },
        { .init = i915_pci_register_driver,
          .exit = i915_pci_unregister_driver },
        { .init = i915_perf_sysctl_register,
          .exit = i915_perf_sysctl_unregister },
};
static int init_progress;

static int __init i915_init(void)
{
        int err, i;

        for (i = 0; i < ARRAY_SIZE(init_funcs); i++) {
                err = init_funcs[i].init();
                if (err < 0) {
                        while (i--) {
                                if (init_funcs[i].exit)
                                        init_funcs[i].exit();
                        }
                        return err;
                } else if (err > 0) {
                        /*
                         * Early-exit success is reserved for things which
                         * don't have an exit() function because we have no
                         * idea how far they got or how to partially tear
                         * them down.
                         */
                        WARN_ON(init_funcs[i].exit);
                        break;
                }
        }

        init_progress = i;

        return 0;
}

static void __exit i915_exit(void)
{
        int i;

        for (i = init_progress - 1; i >= 0; i--) {
                GEM_BUG_ON(i >= ARRAY_SIZE(init_funcs));
                if (init_funcs[i].exit)
                        init_funcs[i].exit();
        }
}

module_init(i915_init);
module_exit(i915_exit);

MODULE_AUTHOR("Tungsten Graphics, Inc.");
MODULE_AUTHOR("Intel Corporation");

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL and additional rights");