diff options
Diffstat (limited to 'drivers/gpu/drm/msm/msm_ringbuffer.h')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_ringbuffer.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_ringbuffer.h b/drivers/gpu/drm/msm/msm_ringbuffer.h new file mode 100644 index 000000000000..6e0e1049fa4f --- /dev/null +++ b/drivers/gpu/drm/msm/msm_ringbuffer.h @@ -0,0 +1,43 @@ +/* + * Copyright (C) 2013 Red Hat + * Author: Rob Clark <robdclark@gmail.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __MSM_RINGBUFFER_H__ +#define __MSM_RINGBUFFER_H__ + +#include "msm_drv.h" + +struct msm_ringbuffer { + struct msm_gpu *gpu; + int size; + struct drm_gem_object *bo; + uint32_t *start, *end, *cur; +}; + +struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int size); +void msm_ringbuffer_destroy(struct msm_ringbuffer *ring); + +/* ringbuffer helpers (the parts that are same for a3xx/a2xx/z180..) */ + +static inline void +OUT_RING(struct msm_ringbuffer *ring, uint32_t data) +{ + if (ring->cur == ring->end) + ring->cur = ring->start; + *(ring->cur++) = data; +} + +#endif /* __MSM_RINGBUFFER_H__ */ |