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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2013 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
5 */
6
7#ifndef __MSM_RINGBUFFER_H__
8#define __MSM_RINGBUFFER_H__
9
10#include "msm_drv.h"
11
12#define rbmemptr(ring, member) \
13 ((ring)->memptrs_iova + offsetof(struct msm_rbmemptrs, member))
14
15#define rbmemptr_stats(ring, index, member) \
16 (rbmemptr((ring), stats) + \
17 ((index) * sizeof(struct msm_gpu_submit_stats)) + \
18 offsetof(struct msm_gpu_submit_stats, member))
19
20struct msm_gpu_submit_stats {
21 u64 cpcycles_start;
22 u64 cpcycles_end;
23 u64 alwayson_start;
24 u64 alwayson_end;
25};
26
27#define MSM_GPU_SUBMIT_STATS_COUNT 64
28
29struct msm_rbmemptrs {
30 volatile uint32_t rptr;
31 volatile uint32_t fence;
32
33 volatile struct msm_gpu_submit_stats stats[MSM_GPU_SUBMIT_STATS_COUNT];
34};
35
36struct msm_ringbuffer {
37 struct msm_gpu *gpu;
38 int id;
39 struct drm_gem_object *bo;
40 uint32_t *start, *end, *cur, *next;
41 struct list_head submits;
42 uint64_t iova;
43 uint32_t seqno;
44 uint32_t hangcheck_fence;
45 struct msm_rbmemptrs *memptrs;
46 uint64_t memptrs_iova;
47 struct msm_fence_context *fctx;
48 spinlock_t lock;
49};
50
51struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id,
52 void *memptrs, uint64_t memptrs_iova);
53void msm_ringbuffer_destroy(struct msm_ringbuffer *ring);
54
55/* ringbuffer helpers (the parts that are same for a3xx/a2xx/z180..) */
56
57static inline void
58OUT_RING(struct msm_ringbuffer *ring, uint32_t data)
59{
60 /*
61 * ring->next points to the current command being written - it won't be
62 * committed as ring->cur until the flush
63 */
64 if (ring->next == ring->end)
65 ring->next = ring->start;
66 *(ring->next++) = data;
67}
68
69#endif /* __MSM_RINGBUFFER_H__ */