LXR linux/drivers/gpu/drm/msm/msm

   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