freedreno_ringbuffer.h revision e5d8a9c1d6375feb74feb52f419a025f1abf94d1 
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#ifndef FREEDRENO_RINGBUFFER_H_
30#define FREEDRENO_RINGBUFFER_H_
31
32#include <freedreno_drmif.h>
33
34/* the ringbuffer object is not opaque so that OUT_RING() type stuff
35 * can be inlined.  Note that users should not make assumptions about
36 * the size of this struct.. more stuff will be added when we eventually
37 * have a kernel driver that can deal w/ reloc's..
38 */
39
40struct fd_rb_bo;
41struct fd_ringmarker;
42
43struct fd_ringbuffer {
44	int size;
45	uint32_t *cur, *end, *start, *last_start;
46	struct fd_pipe *pipe;
47	struct fd_rb_bo *bo;
48	uint32_t last_timestamp;
49};
50
51/* ringbuffer flush flags:
52 *   SAVE_GMEM - GMEM contents not preserved to system memory
53 *       in cmds flushed so if there is a context switch after
54 *       this flush and before the next one the kernel must
55 *       save GMEM contents
56 *   SUBMIT_IB_LIST - tbd..
57 */
58#define DRM_FREEDRENO_CONTEXT_SAVE_GMEM       1
59#define DRM_FREEDRENO_CONTEXT_SUBMIT_IB_LIST  4
60
61
62struct fd_ringbuffer * fd_ringbuffer_new(struct fd_pipe *pipe,
63		uint32_t size);
64void fd_ringbuffer_del(struct fd_ringbuffer *ring);
65void fd_ringbuffer_reset(struct fd_ringbuffer *ring);
66int fd_ringbuffer_flush(struct fd_ringbuffer *ring);
67uint32_t fd_ringbuffer_timestamp(struct fd_ringbuffer *ring);
68
69static inline void fd_ringbuffer_emit(struct fd_ringbuffer *ring,
70		uint32_t data)
71{
72	(*ring->cur++) = data;
73}
74
75void fd_ringbuffer_emit_reloc(struct fd_ringbuffer *ring,
76		struct fd_bo *bo, uint32_t offset, uint32_t or);
77void fd_ringbuffer_emit_reloc_shift(struct fd_ringbuffer *ring,
78		struct fd_bo *bo, uint32_t offset, uint32_t or, int32_t shift);
79void fd_ringbuffer_emit_reloc_ring(struct fd_ringbuffer *ring,
80		struct fd_ringmarker *target);
81
82struct fd_ringmarker * fd_ringmarker_new(struct fd_ringbuffer *ring);
83void fd_ringmarker_del(struct fd_ringmarker *marker);
84void fd_ringmarker_mark(struct fd_ringmarker *marker);
85uint32_t fd_ringmarker_dwords(struct fd_ringmarker *start,
86		struct fd_ringmarker *end);
87int fd_ringmarker_flush(struct fd_ringmarker *marker);
88
89#endif /* FREEDRENO_RINGBUFFER_H_ */
90