linux-imx

// SPDX-License-Identifier: GPL-2.0-only

/*

 * Tegra host1x Syncpoints

 *

 * Copyright (c) 2010-2015, NVIDIA Corporation.

 */

​

#include <linux/module.h>

#include <linux/device.h>

#include <linux/slab.h>

​

#include <trace/events/host1x.h>

​

#include "syncpt.h"

#include "dev.h"

#include "intr.h"

#include "debug.h"

​

#define SYNCPT_CHECK_PERIOD (2 * HZ)

#define MAX_STUCK_CHECK_COUNT 15

​

static struct host1x_syncpt_base *

host1x_syncpt_base_request(struct host1x *host)

{

    struct host1x_syncpt_base *bases = host->bases;

    unsigned int i;

​

    for (i = 0; i < host->info->nb_bases; i++)

        if (!bases[i].requested)

            break;

​

    if (i >= host->info->nb_bases)

        return NULL;

​

    bases[i].requested = true;

    return &bases[i];

}

​

static void host1x_syncpt_base_free(struct host1x_syncpt_base *base)

{

    if (base)

        base->requested = false;

}

​

static struct host1x_syncpt *host1x_syncpt_alloc(struct host1x *host,

                         struct host1x_client *client,

                         unsigned long flags)

{

    struct host1x_syncpt *sp = host->syncpt;

    unsigned int i;

    char *name;

​

    mutex_lock(&host->syncpt_mutex);

​

    for (i = 0; i < host->info->nb_pts && sp->name; i++, sp++)

        ;

​

    if (i >= host->info->nb_pts)

        goto unlock;

​

    if (flags & HOST1X_SYNCPT_HAS_BASE) {

        sp->base = host1x_syncpt_base_request(host);

        if (!sp->base)