1/*
2 * Copyright (C) 2013 Red Hat
3 * Author: Rob Clark <robdclark@gmail.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program.  If not, see <http://www.gnu.org/licenses/>.
16 */
17
18#ifndef __MSM_RINGBUFFER_H__
19#define __MSM_RINGBUFFER_H__
20
21#include "msm_drv.h"
22
23struct msm_ringbuffer {
24	struct msm_gpu *gpu;
25	int size;
26	struct drm_gem_object *bo;
27	uint32_t *start, *end, *cur;
28};
29
30struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int size);
31void msm_ringbuffer_destroy(struct msm_ringbuffer *ring);
32
33/* ringbuffer helpers (the parts that are same for a3xx/a2xx/z180..) */
34
35static inline void
36OUT_RING(struct msm_ringbuffer *ring, uint32_t data)
37{
38	if (ring->cur == ring->end)
39		ring->cur = ring->start;
40	*(ring->cur++) = data;
41}
42
43#endif /* __MSM_RINGBUFFER_H__ */
44