freedreno_ringbuffer.c revision e88f27b3 
1/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
2
3/*
4 * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 * Authors:
26 *    Rob Clark <robclark@freedesktop.org>
27 */
28
29#include <assert.h>
30
31#include "freedreno_drmif.h"
32#include "freedreno_priv.h"
33#include "freedreno_ringbuffer.h"
34
35struct fd_ringbuffer * fd_ringbuffer_new(struct fd_pipe *pipe,
36		uint32_t size)
37{
38	struct fd_ringbuffer *ring;
39
40	ring = pipe->funcs->ringbuffer_new(pipe, size);
41	if (!ring)
42		return NULL;
43
44	ring->size = size;
45	ring->pipe = pipe;
46	ring->start = ring->funcs->hostptr(ring);
47	ring->end = &(ring->start[size/4]);
48
49	ring->cur = ring->last_start = ring->start;
50
51	return ring;
52}
53
54void fd_ringbuffer_del(struct fd_ringbuffer *ring)
55{
56	ring->funcs->destroy(ring);
57}
58
59/* ringbuffers which are IB targets should set the toplevel rb (ie.
60 * the IB source) as it's parent before emitting reloc's, to ensure
61 * the bookkeeping works out properly.
62 */
63void fd_ringbuffer_set_parent(struct fd_ringbuffer *ring,
64		struct fd_ringbuffer *parent)
65{
66	ring->parent = parent;
67}
68
69void fd_ringbuffer_reset(struct fd_ringbuffer *ring)
70{
71	uint32_t *start = ring->start;
72	if (ring->pipe->id == FD_PIPE_2D)
73		start = &ring->start[0x140];
74	ring->cur = ring->last_start = start;
75}
76
77/* maybe get rid of this and use fd_ringmarker_flush() from DDX too? */
78int fd_ringbuffer_flush(struct fd_ringbuffer *ring)
79{
80	return ring->funcs->flush(ring, ring->last_start);
81}
82
83uint32_t fd_ringbuffer_timestamp(struct fd_ringbuffer *ring)
84{
85	return ring->last_timestamp;
86}
87
88void fd_ringbuffer_reloc(struct fd_ringbuffer *ring,
89		const struct fd_reloc *reloc)
90{
91	ring->funcs->emit_reloc(ring, reloc);
92}
93
94void fd_ringbuffer_emit_reloc_ring(struct fd_ringbuffer *ring,
95		struct fd_ringmarker *target, struct fd_ringmarker *end)
96{
97	assert(target->ring == end->ring);
98	ring->funcs->emit_reloc_ring(ring, target, end);
99}
100
101struct fd_ringmarker * fd_ringmarker_new(struct fd_ringbuffer *ring)
102{
103	struct fd_ringmarker *marker = NULL;
104
105	marker = calloc(1, sizeof(*marker));
106	if (!marker) {
107		ERROR_MSG("allocation failed");
108		return NULL;
109	}
110
111	marker->ring = ring;
112
113	fd_ringmarker_mark(marker);
114
115	return marker;
116}
117
118void fd_ringmarker_del(struct fd_ringmarker *marker)
119{
120	free(marker);
121}
122
123void fd_ringmarker_mark(struct fd_ringmarker *marker)
124{
125	marker->cur = marker->ring->cur;
126}
127
128uint32_t fd_ringmarker_dwords(struct fd_ringmarker *start,
129		struct fd_ringmarker *end)
130{
131	return end->cur - start->cur;
132}
133
134int fd_ringmarker_flush(struct fd_ringmarker *marker)
135{
136	struct fd_ringbuffer *ring = marker->ring;
137	return ring->funcs->flush(ring, marker->cur);
138}
139