// SPDX-License-Identifier: MIT
/*
 * Copyright © 2019 Intel Corporation
 */

#include <linux/debugfs.h>

#include "i915_drv.h"
#include "intel_gt.h"
#include "intel_gt_debugfs.h"
#include "intel_gt_engines_debugfs.h"
#include "intel_gt_mcr.h"
#include "intel_gt_pm_debugfs.h"
#include "intel_sseu_debugfs.h"
#include "uc/intel_uc_debugfs.h"

int intel_gt_debugfs_reset_show(struct intel_gt *gt, u64 *val)
{
        int ret = intel_gt_terminally_wedged(gt);

        switch (ret) {
        case -EIO:
                *val = 1;
                return 0;
        case 0:
                *val = 0;
                return 0;
        default:
                return ret;
        }
}

void intel_gt_debugfs_reset_store(struct intel_gt *gt, u64 val)
{
        /* Flush any previous reset before applying for a new one */
        wait_event(gt->reset.queue,
                   !test_bit(I915_RESET_BACKOFF, &gt->reset.flags));

        intel_gt_handle_error(gt, val, I915_ERROR_CAPTURE,
                              "Manually reset engine mask to %llx", val);
}

/*
 * keep the interface clean where the first parameter
 * is a 'struct intel_gt *' instead of 'void *'
 */
static int __intel_gt_debugfs_reset_show(void *data, u64 *val)
{
        return intel_gt_debugfs_reset_show(data, val);
}

#ifdef notyet

static int __intel_gt_debugfs_reset_store(void *data, u64 val)
{
        intel_gt_debugfs_reset_store(data, val);

        return 0;
}

DEFINE_SIMPLE_ATTRIBUTE(reset_fops, __intel_gt_debugfs_reset_show,
                        __intel_gt_debugfs_reset_store, "%llu\n");

static int steering_show(struct seq_file *m, void *data)
{
        struct drm_printer p = drm_seq_file_printer(m);
        struct intel_gt *gt = m->private;

        intel_gt_mcr_report_steering(&p, gt, true);

        return 0;
}
DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(steering);

static void gt_debugfs_register(struct intel_gt *gt, struct dentry *root)
{
        static const struct intel_gt_debugfs_file files[] = {
                { "reset", &reset_fops, NULL },
                { "steering", &steering_fops },
        };

        intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), gt);
}

#endif /* notyet */

void intel_gt_debugfs_register(struct intel_gt *gt)
{
#ifdef notyet
        struct dentry *debugfs_root = gt->i915->drm.debugfs_root;
        struct dentry *root;
        char gtname[4];

        if (!debugfs_root)
                return;

        snprintf(gtname, sizeof(gtname), "gt%u", gt->info.id);
        root = debugfs_create_dir(gtname, debugfs_root);
        if (IS_ERR(root))
                return;

        gt_debugfs_register(gt, root);

        intel_gt_engines_debugfs_register(gt, root);
        intel_gt_pm_debugfs_register(gt, root);
        intel_sseu_debugfs_register(gt, root);

        intel_uc_debugfs_register(&gt->uc, root);
#endif
}

void intel_gt_debugfs_register_files(struct dentry *root,
                                     const struct intel_gt_debugfs_file *files,
                                     unsigned long count, void *data)
{
#ifdef notyet
        while (count--) {
                umode_t mode = files->fops->write ? 0644 : 0444;

                if (!files->eval || files->eval(data))
                        debugfs_create_file(files->name,
                                            mode, root, data,
                                            files->fops);

                files++;
        }
#endif
}