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 #include <drm/sde_drm.h>
37
38 // Intentionally included after xf86 headers so that they in-turn include libdrm version of drm.h
39 // that doesn't use keyword "virtual" for a variable name. Not doing so leads to the kernel version
40 // of drm.h being included causing compilation to fail
41 #include <drm/msm_drm.h>
42 #include <algorithm>
43 #include <iterator>
44
45 #include "drm_master.h"
46
47 #define __CLASS__ "DRMMaster"
48
49 using std::mutex;
50 using std::lock_guard;
51 using std::begin;
52 using std::copy;
53 using std::end;
54 using std::fill;
55
56 namespace drm_utils {
57
58 DRMMaster *DRMMaster::s_instance = nullptr;
59 mutex DRMMaster::s_lock;
60
GetInstance(DRMMaster ** master)61 int DRMMaster::GetInstance(DRMMaster **master) {
62 lock_guard<mutex> obj(s_lock);
63
64 if (!s_instance) {
65 s_instance = new DRMMaster();
66 if (s_instance->Init() < 0) {
67 delete s_instance;
68 s_instance = nullptr;
69 return -ENODEV;
70 }
71 }
72
73 *master = s_instance;
74 return 0;
75 }
76
DestroyInstance()77 void DRMMaster::DestroyInstance() {
78 lock_guard<mutex> obj(s_lock);
79 delete s_instance;
80 s_instance = nullptr;
81 }
82
Init()83 int DRMMaster::Init() {
84 dev_fd_ = drmOpen("msm_drm", nullptr);
85 if (dev_fd_ < 0) {
86 DRM_LOGE("drmOpen failed with error %d", dev_fd_);
87 return -ENODEV;
88 }
89
90 return 0;
91 }
92
~DRMMaster()93 DRMMaster::~DRMMaster() {
94 drmClose(dev_fd_);
95 dev_fd_ = -1;
96 }
97
CreateFbId(const DRMBuffer & drm_buffer,uint32_t * fb_id)98 int DRMMaster::CreateFbId(const DRMBuffer &drm_buffer, uint32_t *fb_id) {
99 uint32_t gem_handle = 0;
100 int ret = drmPrimeFDToHandle(dev_fd_, drm_buffer.fd, &gem_handle);
101 if (ret) {
102 DRM_LOGE("drmPrimeFDToHandle failed with error %d", ret);
103 return ret;
104 }
105
106 struct drm_mode_fb_cmd2 cmd2 {};
107 cmd2.width = drm_buffer.width;
108 cmd2.height = drm_buffer.height;
109 cmd2.pixel_format = drm_buffer.drm_format;
110 cmd2.flags = DRM_MODE_FB_MODIFIERS;
111 fill(begin(cmd2.handles), begin(cmd2.handles) + drm_buffer.num_planes, gem_handle);
112 copy(begin(drm_buffer.stride), end(drm_buffer.stride), begin(cmd2.pitches));
113 copy(begin(drm_buffer.offset), end(drm_buffer.offset), begin(cmd2.offsets));
114 fill(begin(cmd2.modifier), begin(cmd2.modifier) + drm_buffer.num_planes,
115 drm_buffer.drm_format_modifier);
116
117 if ((ret = drmIoctl(dev_fd_, DRM_IOCTL_MODE_ADDFB2, &cmd2))) {
118 DRM_LOGE("DRM_IOCTL_MODE_ADDFB2 failed with error %d", ret);
119 } else {
120 *fb_id = cmd2.fb_id;
121 }
122
123 struct drm_gem_close gem_close = {};
124 gem_close.handle = gem_handle;
125 int ret1 = drmIoctl(dev_fd_, DRM_IOCTL_GEM_CLOSE, &gem_close);
126 if (ret1) {
127 DRM_LOGE("drmIoctl::DRM_IOCTL_GEM_CLOSE failed with error %d", ret1);
128 return ret1;
129 }
130
131 return ret;
132 }
133
RemoveFbId(uint32_t fb_id)134 int DRMMaster::RemoveFbId(uint32_t fb_id) {
135 int ret = 0;
136 #ifdef DRM_IOCTL_MSM_RMFB2
137 ret = drmIoctl(dev_fd_, DRM_IOCTL_MSM_RMFB2, &fb_id);
138 if (ret) {
139 DRM_LOGE("drmIoctl::DRM_IOCTL_MSM_RMFB2 failed for fb_id %d with error %d", fb_id, errno);
140 }
141 #else
142 ret = drmModeRmFB(dev_fd_, fb_id);
143 if (ret) {
144 DRM_LOGE("drmModeRmFB failed for fb_id %d with error %d", fb_id, ret);
145 }
146 #endif
147 return ret;
148 }
149
IsRmFbRefCounted()150 bool DRMMaster::IsRmFbRefCounted() {
151 #ifdef DRM_IOCTL_MSM_RMFB2
152 return true;
153 #endif
154 return false;
155 }
156
157 } // namespace drm_utils
158