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
bo_allocate(struct msm_bo * msm_bo)35 static 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
msm_bo_offset(struct fd_bo * bo,uint64_t * offset)61 static 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
msm_bo_cpu_prep(struct fd_bo * bo,struct fd_pipe * pipe,uint32_t op)71 static 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, 5000000000);
79
80 return drmCommandWrite(bo->dev->fd, DRM_MSM_GEM_CPU_PREP, &req, sizeof(req));
81 }
82
msm_bo_cpu_fini(struct fd_bo * bo)83 static 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
msm_bo_madvise(struct fd_bo * bo,int willneed)92 static int msm_bo_madvise(struct fd_bo *bo, int willneed)
93 {
94 struct drm_msm_gem_madvise req = {
95 .handle = bo->handle,
96 .madv = willneed ? MSM_MADV_WILLNEED : MSM_MADV_DONTNEED,
97 };
98 int ret;
99
100 /* older kernels do not support this: */
101 if (bo->dev->version < FD_VERSION_MADVISE)
102 return willneed;
103
104 ret = drmCommandWriteRead(bo->dev->fd, DRM_MSM_GEM_MADVISE, &req, sizeof(req));
105 if (ret)
106 return ret;
107
108 return req.retained;
109 }
110
msm_bo_destroy(struct fd_bo * bo)111 static void msm_bo_destroy(struct fd_bo *bo)
112 {
113 struct msm_bo *msm_bo = to_msm_bo(bo);
114 free(msm_bo);
115
116 }
117
118 static const struct fd_bo_funcs funcs = {
119 .offset = msm_bo_offset,
120 .cpu_prep = msm_bo_cpu_prep,
121 .cpu_fini = msm_bo_cpu_fini,
122 .madvise = msm_bo_madvise,
123 .destroy = msm_bo_destroy,
124 };
125
126 /* allocate a buffer handle: */
msm_bo_new_handle(struct fd_device * dev,uint32_t size,uint32_t flags,uint32_t * handle)127 drm_private int msm_bo_new_handle(struct fd_device *dev,
128 uint32_t size, uint32_t flags, uint32_t *handle)
129 {
130 struct drm_msm_gem_new req = {
131 .size = size,
132 .flags = MSM_BO_WC, // TODO figure out proper flags..
133 };
134 int ret;
135
136 ret = drmCommandWriteRead(dev->fd, DRM_MSM_GEM_NEW,
137 &req, sizeof(req));
138 if (ret)
139 return ret;
140
141 *handle = req.handle;
142
143 return 0;
144 }
145
146 /* allocate a new buffer object */
msm_bo_from_handle(struct fd_device * dev,uint32_t size,uint32_t handle)147 drm_private struct fd_bo * msm_bo_from_handle(struct fd_device *dev,
148 uint32_t size, uint32_t handle)
149 {
150 struct msm_bo *msm_bo;
151 struct fd_bo *bo;
152
153 msm_bo = calloc(1, sizeof(*msm_bo));
154 if (!msm_bo)
155 return NULL;
156
157 bo = &msm_bo->base;
158 bo->funcs = &funcs;
159
160 return bo;
161 }
162