linux/drivers/gpu/host1x/hw/syncpt_hw.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Tegra host1x Syncpoints
 *
 * Copyright (c) 2010-2013, NVIDIA Corporation.
 */

#include <linux/io.h>

#include "../dev.h"
#include "../syncpt.h"

/*
 * Write the current syncpoint value back to hw.
 */
static void syncpt_restore(struct host1x_syncpt *sp)
{ … }

/*
 * Write the current waitbase value back to hw.
 */
static void syncpt_restore_wait_base(struct host1x_syncpt *sp)
{ … }

/*
 * Read waitbase value from hw.
 */
static void syncpt_read_wait_base(struct host1x_syncpt *sp)
{ … }

/*
 * Updates the last value read from hardware.
 */
static u32 syncpt_load(struct host1x_syncpt *sp)
{ … }

/*
 * Write a cpu syncpoint increment to the hardware, without touching
 * the cache.
 */
static int syncpt_cpu_incr(struct host1x_syncpt *sp)
{ … }

/**
 * syncpt_assign_to_channel() - Assign syncpoint to channel
 * @sp: syncpoint
 * @ch: channel
 *
 * On chips with the syncpoint protection feature (Tegra186+), assign @sp to
 * @ch, preventing other channels from incrementing the syncpoints. If @ch is
 * NULL, unassigns the syncpoint.
 *
 * On older chips, do nothing.
 */
static void syncpt_assign_to_channel(struct host1x_syncpt *sp,
				  struct host1x_channel *ch)
{ … }

/**
 * syncpt_enable_protection() - Enable syncpoint protection
 * @host: host1x instance
 *
 * On chips with the syncpoint protection feature (Tegra186+), enable this
 * feature. On older chips, do nothing.
 */
static void syncpt_enable_protection(struct host1x *host)
{ … }

static const struct host1x_syncpt_ops host1x_syncpt_ops = …;