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 #include "msm_priv.h"
30
bo_allocate(struct msm_bo * msm_bo)31 static int bo_allocate(struct msm_bo *msm_bo)
32 {
33 struct fd_bo *bo = &msm_bo->base;
34 if (!msm_bo->offset) {
35 struct drm_msm_gem_info req = {
36 .handle = bo->handle,
37 };
38 int ret;
39
40 /* if the buffer is already backed by pages then this
41 * doesn't actually do anything (other than giving us
42 * the offset)
43 */
44 ret = drmCommandWriteRead(bo->dev->fd, DRM_MSM_GEM_INFO,
45 &req, sizeof(req));
46 if (ret) {
47 ERROR_MSG("alloc failed: %s", strerror(errno));
48 return ret;
49 }
50
51 msm_bo->offset = req.offset;
52 }
53
54 return 0;
55 }
56
msm_bo_offset(struct fd_bo * bo,uint64_t * offset)57 static int msm_bo_offset(struct fd_bo *bo, uint64_t *offset)
58 {
59 struct msm_bo *msm_bo = to_msm_bo(bo);
60 int ret = bo_allocate(msm_bo);
61 if (ret)
62 return ret;
63 *offset = msm_bo->offset;
64 return 0;
65 }
66
msm_bo_cpu_prep(struct fd_bo * bo,struct fd_pipe * pipe,uint32_t op)67 static int msm_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op)
68 {
69 struct drm_msm_gem_cpu_prep req = {
70 .handle = bo->handle,
71 .op = op,
72 };
73
74 get_abs_timeout(&req.timeout, 5000000000);
75
76 return drmCommandWrite(bo->dev->fd, DRM_MSM_GEM_CPU_PREP, &req, sizeof(req));
77 }
78
msm_bo_cpu_fini(struct fd_bo * bo)79 static void msm_bo_cpu_fini(struct fd_bo *bo)
80 {
81 struct drm_msm_gem_cpu_fini req = {
82 .handle = bo->handle,
83 };
84
85 drmCommandWrite(bo->dev->fd, DRM_MSM_GEM_CPU_FINI, &req, sizeof(req));
86 }
87
msm_bo_madvise(struct fd_bo * bo,int willneed)88 static int msm_bo_madvise(struct fd_bo *bo, int willneed)
89 {
90 struct drm_msm_gem_madvise req = {
91 .handle = bo->handle,
92 .madv = willneed ? MSM_MADV_WILLNEED : MSM_MADV_DONTNEED,
93 };
94 int ret;
95
96 /* older kernels do not support this: */
97 if (bo->dev->version < FD_VERSION_MADVISE)
98 return willneed;
99
100 ret = drmCommandWriteRead(bo->dev->fd, DRM_MSM_GEM_MADVISE, &req, sizeof(req));
101 if (ret)
102 return ret;
103
104 return req.retained;
105 }
106
msm_bo_iova(struct fd_bo * bo)107 static uint64_t msm_bo_iova(struct fd_bo *bo)
108 {
109 struct drm_msm_gem_info req = {
110 .handle = bo->handle,
111 .flags = MSM_INFO_IOVA,
112 };
113
114 drmCommandWriteRead(bo->dev->fd, DRM_MSM_GEM_INFO, &req, sizeof(req));
115
116 return req.offset;
117 }
118
msm_bo_destroy(struct fd_bo * bo)119 static void msm_bo_destroy(struct fd_bo *bo)
120 {
121 struct msm_bo *msm_bo = to_msm_bo(bo);
122 free(msm_bo);
123
124 }
125
126 static const struct fd_bo_funcs funcs = {
127 .offset = msm_bo_offset,
128 .cpu_prep = msm_bo_cpu_prep,
129 .cpu_fini = msm_bo_cpu_fini,
130 .madvise = msm_bo_madvise,
131 .iova = msm_bo_iova,
132 .destroy = msm_bo_destroy,
133 };
134
135 /* allocate a buffer handle: */
msm_bo_new_handle(struct fd_device * dev,uint32_t size,uint32_t flags,uint32_t * handle)136 drm_private int msm_bo_new_handle(struct fd_device *dev,
137 uint32_t size, uint32_t flags, uint32_t *handle)
138 {
139 struct drm_msm_gem_new req = {
140 .size = size,
141 .flags = MSM_BO_WC, // TODO figure out proper flags..
142 };
143 int ret;
144
145 ret = drmCommandWriteRead(dev->fd, DRM_MSM_GEM_NEW,
146 &req, sizeof(req));
147 if (ret)
148 return ret;
149
150 *handle = req.handle;
151
152 return 0;
153 }
154
155 /* allocate a new buffer object */
msm_bo_from_handle(struct fd_device * dev,uint32_t size,uint32_t handle)156 drm_private struct fd_bo * msm_bo_from_handle(struct fd_device *dev,
157 uint32_t size, uint32_t handle)
158 {
159 struct msm_bo *msm_bo;
160 struct fd_bo *bo;
161
162 msm_bo = calloc(1, sizeof(*msm_bo));
163 if (!msm_bo)
164 return NULL;
165
166 bo = &msm_bo->base;
167 bo->funcs = &funcs;
168
169 return bo;
170 }
171