1 /*
2 * Copyright 2020 The Chromium OS Authors. All rights reserved.
3 * Use of this source code is governed by a BSD-style license that can be
4 * found in the LICENSE file.
5 */
6 #include <amdgpu_drm.h>
7 #include <ctype.h>
8 #include <dirent.h>
9 #include <errno.h>
10 #include <fcntl.h>
11 #include <radeon_drm.h>
12 #include <stddef.h>
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <string.h>
16 #include <unistd.h>
17 #include <xf86drm.h>
18 #include <xf86drmMode.h>
19
20 #include "minigbm_helpers.h"
21 #include "util.h"
22
23 /* These are set in stone. from drm_pciids.h */
24 static unsigned int radeon_igp_ids[] = {
25 0x1304, 0x1305, 0x1306, 0x1307, 0x1309, 0x130A, 0x130B, 0x130C, 0x130D, 0x130E, 0x130F,
26 0x1310, 0x1311, 0x1312, 0x1313, 0x1315, 0x1316, 0x1317, 0x1318, 0x131B, 0x131C, 0x131D,
27 0x4136, 0x4137, 0x4237, 0x4336, 0x4337, 0x4437, 0x5834, 0x5835, 0x5954, 0x5955, 0x5974,
28 0x5975, 0x5a41, 0x5a42, 0x5a61, 0x5a62, 0x7834, 0x7835, 0x791e, 0x791f, 0x793f, 0x7941,
29 0x7942, 0x796c, 0x796d, 0x796e, 0x796f, 0x9610, 0x9611, 0x9612, 0x9613, 0x9614, 0x9615,
30 0x9616, 0x9640, 0x9641, 0x9642, 0x9643, 0x9644, 0x9645, 0x9647, 0x9648, 0x9649, 0x964a,
31 0x964b, 0x964c, 0x964e, 0x964f, 0x9710, 0x9711, 0x9712, 0x9713, 0x9714, 0x9715, 0x9802,
32 0x9803, 0x9804, 0x9805, 0x9806, 0x9807, 0x9808, 0x9809, 0x980A, 0x9830, 0x9831, 0x9832,
33 0x9833, 0x9834, 0x9835, 0x9836, 0x9837, 0x9838, 0x9839, 0x983a, 0x983b, 0x983c, 0x983d,
34 0x983e, 0x983f, 0x9850, 0x9851, 0x9852, 0x9853, 0x9854, 0x9855, 0x9856, 0x9857, 0x9858,
35 0x9859, 0x985A, 0x985B, 0x985C, 0x985D, 0x985E, 0x985F, 0x9900, 0x9901, 0x9903, 0x9904,
36 0x9905, 0x9906, 0x9907, 0x9908, 0x9909, 0x990A, 0x990B, 0x990C, 0x990D, 0x990E, 0x990F,
37 0x9910, 0x9913, 0x9917, 0x9918, 0x9919, 0x9990, 0x9991, 0x9992, 0x9993, 0x9994, 0x9995,
38 0x9996, 0x9997, 0x9998, 0x9999, 0x999A, 0x999B, 0x999C, 0x999D, 0x99A0, 0x99A2, 0x99A4
39 };
40
dri_node_num(const char * dri_node)41 static int dri_node_num(const char *dri_node)
42 {
43 long num;
44 ssize_t l = strlen(dri_node);
45
46 while (l > 0 && isdigit(dri_node[l - 1]))
47 l--;
48 num = strtol(dri_node + l, NULL, 10);
49 /* Normalize renderDX nodes with cardX nodes. */
50 if (num >= 128)
51 num -= 128;
52 return num;
53 }
54
fd_node_num(int fd)55 static int fd_node_num(int fd)
56 {
57 char fd_path[64];
58 char dri_node[256];
59 ssize_t dri_node_size;
60
61 snprintf(fd_path, sizeof(fd_path), "/proc/self/fd/%d", fd);
62
63 dri_node_size = readlink(fd_path, dri_node, sizeof(dri_node));
64 if (dri_node_size < 0)
65 return -errno;
66 dri_node[dri_node_size] = '\0';
67 return dri_node_num(dri_node);
68 }
69
70 #if 0
71 static int
72 nouveau_getparam(int fd, uint64_t param, uint64_t *value)
73 {
74 struct drm_nouveau_getparam getparam = { .param = param, .value = 0 };
75 int ret = drmCommandWriteRead(fd, DRM_NOUVEAU_GETPARAM, &getparam, sizeof(getparam));
76 *value = getparam.value;
77 return ret;
78 }
79 #endif
80
81 /*
82 * One would wish we could read .driver_features from DRM driver.
83 */
detect_device_info(unsigned int detect_flags,int fd,struct gbm_device_info * info)84 static int detect_device_info(unsigned int detect_flags, int fd, struct gbm_device_info *info)
85 {
86 drmVersionPtr version;
87 drmModeResPtr resources;
88
89 info->dev_type_flags = 0;
90
91 version = drmGetVersion(fd);
92
93 if (!version)
94 return -EINVAL;
95
96 resources = drmModeGetResources(fd);
97 if (resources) {
98 info->connectors = (unsigned int)(resources->count_connectors);
99 if (resources->count_connectors)
100 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_DISPLAY;
101 if (detect_flags & GBM_DETECT_FLAG_CONNECTED) {
102 int c;
103 for (c = 0; c < resources->count_connectors; c++) {
104 drmModeConnectorPtr conn =
105 drmModeGetConnector(fd, resources->connectors[c]);
106 if (!conn)
107 continue;
108 if (conn->connection == DRM_MODE_CONNECTED)
109 info->connected++;
110 if (conn->connector_type == DRM_MODE_CONNECTOR_eDP ||
111 conn->connector_type == DRM_MODE_CONNECTOR_LVDS ||
112 conn->connector_type == DRM_MODE_CONNECTOR_DSI ||
113 conn->connector_type == DRM_MODE_CONNECTOR_DPI)
114 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_INTERNAL_LCD;
115 drmModeFreeConnector(conn);
116 }
117 }
118 drmModeFreeResources(resources);
119 }
120
121 if (strncmp("i915", version->name, version->name_len) == 0) {
122 /*
123 * Detect Intel dGPU here when special getparam ioctl is added.
124 */
125 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_3D;
126 } else if (strncmp("amdgpu", version->name, version->name_len) == 0) {
127 struct drm_amdgpu_info request = { 0 };
128 struct drm_amdgpu_info_device dev_info = { 0 };
129 int ret;
130
131 info->dev_type_flags = GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_3D;
132 request.return_pointer = (uintptr_t)&dev_info;
133 request.return_size = sizeof(dev_info);
134 request.query = AMDGPU_INFO_DEV_INFO;
135
136 ret =
137 drmCommandWrite(fd, DRM_AMDGPU_INFO, &request, sizeof(struct drm_amdgpu_info));
138
139 if (ret != 0)
140 goto done;
141 if (!(dev_info.ids_flags & AMDGPU_IDS_FLAGS_FUSION))
142 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_DISCRETE;
143
144 } else if (strncmp("radeon", version->name, version->name_len) == 0) {
145 struct drm_radeon_info radinfo = { 0, 0, 0 };
146 int ret;
147 uint32_t value = 0;
148 size_t d;
149
150 info->dev_type_flags |=
151 GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_DISCRETE;
152 radinfo.request = RADEON_INFO_DEVICE_ID;
153 radinfo.value = (uintptr_t)&value;
154 ret = drmCommandWriteRead(fd, DRM_RADEON_INFO, &radinfo,
155 sizeof(struct drm_radeon_info));
156 if (ret != 0)
157 goto done;
158
159 for (d = 0; d < (sizeof(radeon_igp_ids) / sizeof(radeon_igp_ids[0])); d++) {
160 if (value == radeon_igp_ids[d]) {
161 info->dev_type_flags &= ~GBM_DEV_TYPE_FLAG_DISCRETE;
162 break;
163 }
164 }
165
166 } else if (strncmp("nvidia", version->name, version->name_len) == 0) {
167 info->dev_type_flags |=
168 GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_DISCRETE;
169 } else if (strncmp("nouveau", version->name, version->name_len) == 0) {
170 info->dev_type_flags |=
171 GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_DISCRETE;
172 } else if (strncmp("msm", version->name, version->name_len) == 0) {
173 info->dev_type_flags |=
174 GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_ARMSOC;
175 } else if (strncmp("armada", version->name, version->name_len) == 0) {
176 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_ARMSOC;
177 } else if (strncmp("exynos", version->name, version->name_len) == 0) {
178 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_ARMSOC;
179 } else if (strncmp("mediatek", version->name, version->name_len) == 0) {
180 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_ARMSOC;
181 } else if (strncmp("rockchip", version->name, version->name_len) == 0) {
182 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_ARMSOC;
183 } else if (strncmp("omapdrm", version->name, version->name_len) == 0) {
184 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_ARMSOC;
185 } else if (strncmp("vc4", version->name, version->name_len) == 0) {
186 info->dev_type_flags |=
187 GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_ARMSOC;
188 } else if (strncmp("etnaviv", version->name, version->name_len) == 0) {
189 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_ARMSOC;
190 } else if (strncmp("lima", version->name, version->name_len) == 0) {
191 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_ARMSOC;
192 } else if (strncmp("panfrost", version->name, version->name_len) == 0) {
193 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_ARMSOC;
194 } else if (strncmp("pvr", version->name, version->name_len) == 0) {
195 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_ARMSOC;
196 } else if (strncmp("v3d", version->name, version->name_len) == 0) {
197 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_ARMSOC;
198 } else if (strncmp("vgem", version->name, version->name_len) == 0) {
199 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_BLOCKED;
200 } else if (strncmp("evdi", version->name, version->name_len) == 0) {
201 info->dev_type_flags |=
202 GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_USB | GBM_DEV_TYPE_FLAG_BLOCKED;
203 } else if (strncmp("udl", version->name, version->name_len) == 0) {
204 info->dev_type_flags |=
205 GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_USB | GBM_DEV_TYPE_FLAG_BLOCKED;
206 }
207
208 done:
209 drmFreeVersion(version);
210 return 0;
211 }
212
gbm_get_default_device_fd(void)213 PUBLIC int gbm_get_default_device_fd(void)
214 {
215 DIR *dir;
216 int ret, fd, dfd = -1;
217 char *rendernode_name;
218 struct dirent *dir_ent;
219 struct gbm_device_info info;
220
221 dir = opendir("/dev/dri");
222 if (!dir)
223 return -errno;
224
225 fd = -1;
226 while ((dir_ent = readdir(dir))) {
227 if (dir_ent->d_type != DT_CHR)
228 continue;
229
230 if (strncmp(dir_ent->d_name, "renderD", 7))
231 continue;
232
233 ret = asprintf(&rendernode_name, "/dev/dri/%s", dir_ent->d_name);
234 if (ret < 0)
235 continue;
236
237 fd = open(rendernode_name, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
238 free(rendernode_name);
239
240 if (fd < 0)
241 continue;
242
243 memset(&info, 0, sizeof(info));
244 if (detect_device_info(0, fd, &info) < 0) {
245 close(fd);
246 fd = -1;
247 continue;
248 }
249
250 if (info.dev_type_flags & GBM_DEV_TYPE_FLAG_BLOCKED) {
251 close(fd);
252 fd = -1;
253 continue;
254 }
255
256 if (!(info.dev_type_flags & GBM_DEV_TYPE_FLAG_DISPLAY)) {
257 close(fd);
258 fd = -1;
259 continue;
260 }
261
262 if (info.dev_type_flags & GBM_DEV_TYPE_FLAG_DISCRETE) {
263 if (dfd < 0)
264 dfd = fd;
265 else
266 close(fd);
267 fd = -1;
268 } else {
269 if (dfd >= 0) {
270 close(dfd);
271 dfd = -1;
272 }
273 break;
274 }
275 }
276
277 closedir(dir);
278
279 if (dfd >= 0)
280 return dfd;
281
282 return fd;
283 }
284
gbm_detect_device_info(unsigned int detect_flags,int fd,struct gbm_device_info * info)285 PUBLIC int gbm_detect_device_info(unsigned int detect_flags, int fd, struct gbm_device_info *info)
286 {
287 if (!info)
288 return -EINVAL;
289 memset(info, 0, sizeof(*info));
290 info->dri_node_num = fd_node_num(fd);
291 return detect_device_info(detect_flags, fd, info);
292 }
293
gbm_detect_device_info_path(unsigned int detect_flags,const char * dev_node,struct gbm_device_info * info)294 PUBLIC int gbm_detect_device_info_path(unsigned int detect_flags, const char *dev_node,
295 struct gbm_device_info *info)
296 {
297 char rendernode_name[64];
298 int fd;
299 int ret;
300
301 if (!info)
302 return -EINVAL;
303 memset(info, 0, sizeof(*info));
304 info->dri_node_num = dri_node_num(dev_node);
305
306 snprintf(rendernode_name, sizeof(rendernode_name), "/dev/dri/renderD%d",
307 info->dri_node_num + 128);
308 fd = open(rendernode_name, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
309 if (fd < 0)
310 return -errno;
311 ret = detect_device_info(detect_flags, fd, info);
312 close(fd);
313 return ret;
314 }
315