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__ */

 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#define rbmemptr(ring, member)  \
24	((ring)->memptrs_iova + offsetof(struct msm_rbmemptrs, member))
25
26struct msm_rbmemptrs {
27	volatile uint32_t rptr;
28	volatile uint32_t fence;
29};
30
31struct msm_ringbuffer {
32	struct msm_gpu *gpu;
33	int id;
34	struct drm_gem_object *bo;
35	uint32_t *start, *end, *cur, *next;
36	struct list_head submits;
37	uint64_t iova;
38	uint32_t seqno;
39	uint32_t hangcheck_fence;
40	struct msm_rbmemptrs *memptrs;
41	uint64_t memptrs_iova;
42	struct msm_fence_context *fctx;
43	spinlock_t lock;
44};
45
46struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id,
47		void *memptrs, uint64_t memptrs_iova);
48void msm_ringbuffer_destroy(struct msm_ringbuffer *ring);
49
50/* ringbuffer helpers (the parts that are same for a3xx/a2xx/z180..) */
51
52static inline void
53OUT_RING(struct msm_ringbuffer *ring, uint32_t data)
54{
55	/*
56	 * ring->next points to the current command being written - it won't be
57	 * committed as ring->cur until the flush
58	 */
59	if (ring->next == ring->end)
60		ring->next = ring->start;
61	*(ring->next++) = data;
62}
63
64#endif /* __MSM_RINGBUFFER_H__ */