msm_bo.c revision e6188e58 
1/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
2
3/*
4 * Copyright (C) 2013 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#ifdef HAVE_CONFIG_H
30# include <config.h>
31#endif
32
33#include "msm_priv.h"
34
35static int bo_allocate(struct msm_bo *msm_bo)
36{
37	struct fd_bo *bo = &msm_bo->base;
38	if (!msm_bo->offset) {
39		struct drm_msm_gem_info req = {
40				.handle = bo->handle,
41		};
42		int ret;
43
44		/* if the buffer is already backed by pages then this
45		 * doesn't actually do anything (other than giving us
46		 * the offset)
47		 */
48		ret = drmCommandWriteRead(bo->dev->fd, DRM_MSM_GEM_INFO,
49				&req, sizeof(req));
50		if (ret) {
51			ERROR_MSG("alloc failed: %s", strerror(errno));
52			return ret;
53		}
54
55		msm_bo->offset = req.offset;
56	}
57
58	return 0;
59}
60
61static int msm_bo_offset(struct fd_bo *bo, uint64_t *offset)
62{
63	struct msm_bo *msm_bo = to_msm_bo(bo);
64	int ret = bo_allocate(msm_bo);
65	if (ret)
66		return ret;
67	*offset = msm_bo->offset;
68	return 0;
69}
70
71static int msm_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op)
72{
73	struct drm_msm_gem_cpu_prep req = {
74			.handle = bo->handle,
75			.op = op,
76	};
77
78	get_abs_timeout(&req.timeout, 5000);
79
80	return drmCommandWrite(bo->dev->fd, DRM_MSM_GEM_CPU_PREP, &req, sizeof(req));
81}
82
83static void msm_bo_cpu_fini(struct fd_bo *bo)
84{
85	struct drm_msm_gem_cpu_fini req = {
86			.handle = bo->handle,
87	};
88
89	drmCommandWrite(bo->dev->fd, DRM_MSM_GEM_CPU_FINI, &req, sizeof(req));
90}
91
92static void msm_bo_destroy(struct fd_bo *bo)
93{
94	struct msm_bo *msm_bo = to_msm_bo(bo);
95	free(msm_bo);
96
97}
98
99static struct fd_bo_funcs funcs = {
100		.offset = msm_bo_offset,
101		.cpu_prep = msm_bo_cpu_prep,
102		.cpu_fini = msm_bo_cpu_fini,
103		.destroy = msm_bo_destroy,
104};
105
106/* allocate a buffer handle: */
107drm_private int msm_bo_new_handle(struct fd_device *dev,
108		uint32_t size, uint32_t flags, uint32_t *handle)
109{
110	struct drm_msm_gem_new req = {
111			.size = size,
112			.flags = MSM_BO_WC,  // TODO figure out proper flags..
113	};
114	int ret;
115
116	ret = drmCommandWriteRead(dev->fd, DRM_MSM_GEM_NEW,
117			&req, sizeof(req));
118	if (ret)
119		return ret;
120
121	*handle = req.handle;
122
123	return 0;
124}
125
126/* allocate a new buffer object */
127drm_private struct fd_bo * msm_bo_from_handle(struct fd_device *dev,
128		uint32_t size, uint32_t handle)
129{
130	struct msm_bo *msm_bo;
131	struct fd_bo *bo;
132	unsigned i;
133
134	msm_bo = calloc(1, sizeof(*msm_bo));
135	if (!msm_bo)
136		return NULL;
137
138	bo = &msm_bo->base;
139	bo->funcs = &funcs;
140
141	for (i = 0; i < ARRAY_SIZE(msm_bo->list); i++)
142		list_inithead(&msm_bo->list[i]);
143
144	return bo;
145}
146