1 /*
2 * Copyright (c) 2017 - 2018, The Linux Foundation. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above
10 * copyright notice, this list of conditions and the following
11 * disclaimer in the documentation and/or other materials provided
12 * with the distribution.
13 * * Neither the name of The Linux Foundation nor the names of its
14 * contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <errno.h>
31 #include <fcntl.h>
32 #include <sys/stat.h>
33 #include <unistd.h>
34 #include <xf86drm.h>
35 #include <xf86drmMode.h>
36 // Intentionally included after xf86 headers so that they in-turn include libdrm version of drm.h
37 // that doesn't use keyword "virtual" for a variable name. Not doing so leads to the kernel version
38 // of drm.h being included causing compilation to fail
39 #include <drm/msm_drm.h>
40 #include <algorithm>
41 #include <iterator>
42
43 #include "drm_master.h"
44
45 #define __CLASS__ "DRMMaster"
46
47 using std::mutex;
48 using std::lock_guard;
49 using std::begin;
50 using std::copy;
51 using std::end;
52 using std::fill;
53
54 namespace drm_utils {
55
56 DRMMaster *DRMMaster::s_instance = nullptr;
57 mutex DRMMaster::s_lock;
58
GetInstance(DRMMaster ** master)59 int DRMMaster::GetInstance(DRMMaster **master) {
60 lock_guard<mutex> obj(s_lock);
61
62 if (!s_instance) {
63 s_instance = new DRMMaster();
64 if (s_instance->Init() < 0) {
65 delete s_instance;
66 s_instance = nullptr;
67 return -ENODEV;
68 }
69 }
70
71 *master = s_instance;
72 return 0;
73 }
74
DestroyInstance()75 void DRMMaster::DestroyInstance() {
76 lock_guard<mutex> obj(s_lock);
77 delete s_instance;
78 s_instance = nullptr;
79 }
80
Init()81 int DRMMaster::Init() {
82 dev_fd_ = drmOpen("msm_drm", nullptr);
83 if (dev_fd_ < 0) {
84 DRM_LOGE("drmOpen failed with error %d", dev_fd_);
85 return -ENODEV;
86 }
87
88 return 0;
89 }
90
~DRMMaster()91 DRMMaster::~DRMMaster() {
92 drmClose(dev_fd_);
93 dev_fd_ = -1;
94 }
95
CreateFbId(const DRMBuffer & drm_buffer,uint32_t * fb_id)96 int DRMMaster::CreateFbId(const DRMBuffer &drm_buffer, uint32_t *fb_id) {
97 uint32_t gem_handle = 0;
98 int ret = drmPrimeFDToHandle(dev_fd_, drm_buffer.fd, &gem_handle);
99 if (ret) {
100 DRM_LOGE("drmPrimeFDToHandle failed with error %d", ret);
101 return ret;
102 }
103
104 struct drm_mode_fb_cmd2 cmd2 {};
105 cmd2.width = drm_buffer.width;
106 cmd2.height = drm_buffer.height;
107 cmd2.pixel_format = drm_buffer.drm_format;
108 cmd2.flags = DRM_MODE_FB_MODIFIERS;
109 fill(begin(cmd2.handles), begin(cmd2.handles) + drm_buffer.num_planes, gem_handle);
110 copy(begin(drm_buffer.stride), end(drm_buffer.stride), begin(cmd2.pitches));
111 copy(begin(drm_buffer.offset), end(drm_buffer.offset), begin(cmd2.offsets));
112 fill(begin(cmd2.modifier), begin(cmd2.modifier) + drm_buffer.num_planes,
113 drm_buffer.drm_format_modifier);
114
115 if ((ret = drmIoctl(dev_fd_, DRM_IOCTL_MODE_ADDFB2, &cmd2))) {
116 DRM_LOGE("DRM_IOCTL_MODE_ADDFB2 failed with error %d", ret);
117 } else {
118 *fb_id = cmd2.fb_id;
119 }
120
121 struct drm_gem_close gem_close = {};
122 gem_close.handle = gem_handle;
123 int ret1 = drmIoctl(dev_fd_, DRM_IOCTL_GEM_CLOSE, &gem_close);
124 if (ret1) {
125 DRM_LOGE("drmIoctl::DRM_IOCTL_GEM_CLOSE failed with error %d", ret1);
126 return ret1;
127 }
128
129 return ret;
130 }
131
RemoveFbId(uint32_t fb_id)132 int DRMMaster::RemoveFbId(uint32_t fb_id) {
133 int ret = 0;
134 #ifdef DRM_IOCTL_MSM_RMFB2
135 ret = drmIoctl(dev_fd_, DRM_IOCTL_MSM_RMFB2, &fb_id);
136 if (ret) {
137 DRM_LOGE("drmIoctl::DRM_IOCTL_MSM_RMFB2 failed for fb_id %d with error %d", fb_id, errno);
138 }
139 #else
140 ret = drmModeRmFB(dev_fd_, fb_id);
141 if (ret) {
142 DRM_LOGE("drmModeRmFB failed for fb_id %d with error %d", fb_id, ret);
143 }
144 #endif
145 return ret;
146 }
147
IsRmFbRefCounted()148 bool DRMMaster::IsRmFbRefCounted() {
149 #ifdef DRM_IOCTL_MSM_RMFB2
150 return true;
151 #endif
152 return false;
153 }
154
155 } // namespace drm_utils
156