Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
26#define rbmemptr_stats(ring, index, member) \
27 (rbmemptr((ring), stats) + \
28 ((index) * sizeof(struct msm_gpu_submit_stats)) + \
29 offsetof(struct msm_gpu_submit_stats, member))
30
31struct msm_gpu_submit_stats {
32 u64 cpcycles_start;
33 u64 cpcycles_end;
34 u64 alwayson_start;
35 u64 alwayson_end;
36};
37
38#define MSM_GPU_SUBMIT_STATS_COUNT 64
39
40struct msm_rbmemptrs {
41 volatile uint32_t rptr;
42 volatile uint32_t fence;
43
44 volatile struct msm_gpu_submit_stats stats[MSM_GPU_SUBMIT_STATS_COUNT];
45};
46
47struct msm_ringbuffer {
48 struct msm_gpu *gpu;
49 int id;
50 struct drm_gem_object *bo;
51 uint32_t *start, *end, *cur, *next;
52 struct list_head submits;
53 uint64_t iova;
54 uint32_t seqno;
55 uint32_t hangcheck_fence;
56 struct msm_rbmemptrs *memptrs;
57 uint64_t memptrs_iova;
58 struct msm_fence_context *fctx;
59 spinlock_t lock;
60};
61
62struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id,
63 void *memptrs, uint64_t memptrs_iova);
64void msm_ringbuffer_destroy(struct msm_ringbuffer *ring);
65
66/* ringbuffer helpers (the parts that are same for a3xx/a2xx/z180..) */
67
68static inline void
69OUT_RING(struct msm_ringbuffer *ring, uint32_t data)
70{
71 /*
72 * ring->next points to the current command being written - it won't be
73 * committed as ring->cur until the flush
74 */
75 if (ring->next == ring->end)
76 ring->next = ring->start;
77 *(ring->next++) = data;
78}
79
80#endif /* __MSM_RINGBUFFER_H__ */