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 23 struct msm_ringbuffer { 24 struct msm_gpu *gpu; 25 int size; 26 struct drm_gem_object *bo; 27 uint32_t *start, *end, *cur; 28 }; 29 30 struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int size); 31 void msm_ringbuffer_destroy(struct msm_ringbuffer *ring); 32 33 /* ringbuffer helpers (the parts that are same for a3xx/a2xx/z180..) */ 34 35 static inline void 36 OUT_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