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 "gbm.h"
21 #include "minigbm_helpers.h"
22 #include "util.h"
23
24 /* These are set in stone. from drm_pciids.h */
25 static unsigned int radeon_igp_ids[] = {
26 0x1304, 0x1305, 0x1306, 0x1307, 0x1309, 0x130A, 0x130B, 0x130C, 0x130D, 0x130E, 0x130F,
27 0x1310, 0x1311, 0x1312, 0x1313, 0x1315, 0x1316, 0x1317, 0x1318, 0x131B, 0x131C, 0x131D,
28 0x4136, 0x4137, 0x4237, 0x4336, 0x4337, 0x4437, 0x5834, 0x5835, 0x5954, 0x5955, 0x5974,
29 0x5975, 0x5a41, 0x5a42, 0x5a61, 0x5a62, 0x7834, 0x7835, 0x791e, 0x791f, 0x793f, 0x7941,
30 0x7942, 0x796c, 0x796d, 0x796e, 0x796f, 0x9610, 0x9611, 0x9612, 0x9613, 0x9614, 0x9615,
31 0x9616, 0x9640, 0x9641, 0x9642, 0x9643, 0x9644, 0x9645, 0x9647, 0x9648, 0x9649, 0x964a,
32 0x964b, 0x964c, 0x964e, 0x964f, 0x9710, 0x9711, 0x9712, 0x9713, 0x9714, 0x9715, 0x9802,
33 0x9803, 0x9804, 0x9805, 0x9806, 0x9807, 0x9808, 0x9809, 0x980A, 0x9830, 0x9831, 0x9832,
34 0x9833, 0x9834, 0x9835, 0x9836, 0x9837, 0x9838, 0x9839, 0x983a, 0x983b, 0x983c, 0x983d,
35 0x983e, 0x983f, 0x9850, 0x9851, 0x9852, 0x9853, 0x9854, 0x9855, 0x9856, 0x9857, 0x9858,
36 0x9859, 0x985A, 0x985B, 0x985C, 0x985D, 0x985E, 0x985F, 0x9900, 0x9901, 0x9903, 0x9904,
37 0x9905, 0x9906, 0x9907, 0x9908, 0x9909, 0x990A, 0x990B, 0x990C, 0x990D, 0x990E, 0x990F,
38 0x9910, 0x9913, 0x9917, 0x9918, 0x9919, 0x9990, 0x9991, 0x9992, 0x9993, 0x9994, 0x9995,
39 0x9996, 0x9997, 0x9998, 0x9999, 0x999A, 0x999B, 0x999C, 0x999D, 0x99A0, 0x99A2, 0x99A4
40 };
41
dri_node_num(const char * dri_node)42 static int dri_node_num(const char *dri_node)
43 {
44 long num;
45 ssize_t l = strlen(dri_node);
46
47 while (l > 0 && isdigit(dri_node[l - 1]))
48 l--;
49 num = strtol(dri_node + l, NULL, 10);
50 /* Normalize renderDX nodes with cardX nodes. */
51 if (num >= 128)
52 num -= 128;
53 return num;
54 }
55
fd_node_num(int fd)56 static int fd_node_num(int fd)
57 {
58 char fd_path[64];
59 char dri_node[256];
60 ssize_t dri_node_size;
61
62 snprintf(fd_path, sizeof(fd_path), "/proc/self/fd/%d", fd);
63
64 dri_node_size = readlink(fd_path, dri_node, sizeof(dri_node));
65 if (dri_node_size < 0)
66 return -errno;
67 dri_node[dri_node_size] = '\0';
68 return dri_node_num(dri_node);
69 }
70
71 #if 0
72 static int
73 nouveau_getparam(int fd, uint64_t param, uint64_t *value)
74 {
75 struct drm_nouveau_getparam getparam = { .param = param, .value = 0 };
76 int ret = drmCommandWriteRead(fd, DRM_NOUVEAU_GETPARAM, &getparam, sizeof(getparam));
77 *value = getparam.value;
78 return ret;
79 }
80 #endif
81
82 /*
83 * One would wish we could read .driver_features from DRM driver.
84 */
detect_device_info(unsigned int detect_flags,int fd,struct gbm_device_info * info)85 static int detect_device_info(unsigned int detect_flags, int fd, struct gbm_device_info *info)
86 {
87 drmVersionPtr version;
88 drmModeResPtr resources;
89
90 info->dev_type_flags = 0;
91
92 version = drmGetVersion(fd);
93
94 if (!version)
95 return -EINVAL;
96
97 resources = drmModeGetResources(fd);
98 if (resources) {
99 info->connectors = (unsigned int)(resources->count_connectors);
100 if (resources->count_connectors)
101 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_DISPLAY;
102 if (detect_flags & GBM_DETECT_FLAG_CONNECTED) {
103 int c;
104 for (c = 0; c < resources->count_connectors; c++) {
105 drmModeConnectorPtr conn =
106 drmModeGetConnector(fd, resources->connectors[c]);
107 if (!conn)
108 continue;
109 if (conn->connection == DRM_MODE_CONNECTED)
110 info->connected++;
111 if (conn->connector_type == DRM_MODE_CONNECTOR_eDP ||
112 conn->connector_type == DRM_MODE_CONNECTOR_LVDS ||
113 conn->connector_type == DRM_MODE_CONNECTOR_DSI ||
114 conn->connector_type == DRM_MODE_CONNECTOR_DPI)
115 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_INTERNAL_LCD;
116 drmModeFreeConnector(conn);
117 }
118 }
119 drmModeFreeResources(resources);
120 }
121
122 if (strncmp("i915", version->name, version->name_len) == 0) {
123 /*
124 * Detect Intel dGPU here when special getparam ioctl is added.
125 */
126 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_3D;
127 } else if (strncmp("amdgpu", version->name, version->name_len) == 0) {
128 struct drm_amdgpu_info request = { 0 };
129 struct drm_amdgpu_info_device dev_info = { 0 };
130 int ret;
131
132 info->dev_type_flags = GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_3D;
133 request.return_pointer = (uintptr_t)&dev_info;
134 request.return_size = sizeof(dev_info);
135 request.query = AMDGPU_INFO_DEV_INFO;
136
137 ret =
138 drmCommandWrite(fd, DRM_AMDGPU_INFO, &request, sizeof(struct drm_amdgpu_info));
139
140 if (ret != 0)
141 goto done;
142 if (!(dev_info.ids_flags & AMDGPU_IDS_FLAGS_FUSION))
143 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_DISCRETE;
144
145 } else if (strncmp("radeon", version->name, version->name_len) == 0) {
146 struct drm_radeon_info radinfo = { 0, 0, 0 };
147 int ret;
148 uint32_t value = 0;
149 size_t d;
150
151 info->dev_type_flags |=
152 GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_DISCRETE;
153 radinfo.request = RADEON_INFO_DEVICE_ID;
154 radinfo.value = (uintptr_t)&value;
155 ret = drmCommandWriteRead(fd, DRM_RADEON_INFO, &radinfo,
156 sizeof(struct drm_radeon_info));
157 if (ret != 0)
158 goto done;
159
160 for (d = 0; d < (sizeof(radeon_igp_ids) / sizeof(radeon_igp_ids[0])); d++) {
161 if (value == radeon_igp_ids[d]) {
162 info->dev_type_flags &= ~GBM_DEV_TYPE_FLAG_DISCRETE;
163 break;
164 }
165 }
166
167 } else if (strncmp("nvidia", version->name, version->name_len) == 0) {
168 info->dev_type_flags |=
169 GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_DISCRETE;
170 } else if (strncmp("nouveau", version->name, version->name_len) == 0) {
171 info->dev_type_flags |=
172 GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_DISCRETE;
173 } else if (strncmp("msm", version->name, version->name_len) == 0) {
174 info->dev_type_flags |=
175 GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_ARMSOC;
176 } else if (strncmp("armada", version->name, version->name_len) == 0) {
177 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_ARMSOC;
178 } else if (strncmp("exynos", version->name, version->name_len) == 0) {
179 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_ARMSOC;
180 } else if (strncmp("mediatek", version->name, version->name_len) == 0) {
181 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_ARMSOC;
182 } else if (strncmp("rockchip", version->name, version->name_len) == 0) {
183 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_ARMSOC;
184 } else if (strncmp("omapdrm", version->name, version->name_len) == 0) {
185 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_ARMSOC;
186 } else if (strncmp("vc4", version->name, version->name_len) == 0) {
187 info->dev_type_flags |=
188 GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_ARMSOC;
189 } else if (strncmp("etnaviv", version->name, version->name_len) == 0) {
190 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_ARMSOC;
191 } else if (strncmp("lima", version->name, version->name_len) == 0) {
192 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_ARMSOC;
193 } else if (strncmp("panfrost", version->name, version->name_len) == 0) {
194 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_ARMSOC;
195 } else if (strncmp("pvr", version->name, version->name_len) == 0) {
196 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_ARMSOC;
197 } else if (strncmp("v3d", version->name, version->name_len) == 0) {
198 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_3D | GBM_DEV_TYPE_FLAG_ARMSOC;
199 } else if (strncmp("vgem", version->name, version->name_len) == 0) {
200 info->dev_type_flags |= GBM_DEV_TYPE_FLAG_BLOCKED;
201 } else if (strncmp("evdi", version->name, version->name_len) == 0) {
202 info->dev_type_flags |=
203 GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_USB | GBM_DEV_TYPE_FLAG_BLOCKED;
204 } else if (strncmp("udl", version->name, version->name_len) == 0) {
205 info->dev_type_flags |=
206 GBM_DEV_TYPE_FLAG_DISPLAY | GBM_DEV_TYPE_FLAG_USB | GBM_DEV_TYPE_FLAG_BLOCKED;
207 }
208
209 done:
210 drmFreeVersion(version);
211 return 0;
212 }
213
gbm_get_default_device_fd(void)214 static int gbm_get_default_device_fd(void)
215 {
216 DIR *dir;
217 int ret, fd, dfd = -1;
218 char *rendernode_name;
219 struct dirent *dir_ent;
220 struct gbm_device_info info;
221
222 dir = opendir("/dev/dri");
223 if (!dir)
224 return -errno;
225
226 fd = -1;
227 while ((dir_ent = readdir(dir))) {
228 if (dir_ent->d_type != DT_CHR)
229 continue;
230
231 if (strncmp(dir_ent->d_name, "renderD", 7))
232 continue;
233
234 ret = asprintf(&rendernode_name, "/dev/dri/%s", dir_ent->d_name);
235 if (ret < 0)
236 continue;
237
238 fd = open(rendernode_name, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
239 free(rendernode_name);
240
241 if (fd < 0)
242 continue;
243
244 memset(&info, 0, sizeof(info));
245 if (detect_device_info(0, fd, &info) < 0) {
246 close(fd);
247 fd = -1;
248 continue;
249 }
250
251 if (info.dev_type_flags & GBM_DEV_TYPE_FLAG_BLOCKED) {
252 close(fd);
253 fd = -1;
254 continue;
255 }
256
257 if (!(info.dev_type_flags & GBM_DEV_TYPE_FLAG_DISPLAY)) {
258 close(fd);
259 fd = -1;
260 continue;
261 }
262
263 if (info.dev_type_flags & GBM_DEV_TYPE_FLAG_DISCRETE) {
264 if (dfd < 0)
265 dfd = fd;
266 else
267 close(fd);
268 fd = -1;
269 } else {
270 if (dfd >= 0) {
271 close(dfd);
272 dfd = -1;
273 }
274 break;
275 }
276 }
277
278 closedir(dir);
279
280 if (dfd >= 0)
281 return dfd;
282
283 return fd;
284 }
285
gbm_detect_device_info(unsigned int detect_flags,int fd,struct gbm_device_info * info)286 PUBLIC int gbm_detect_device_info(unsigned int detect_flags, int fd, struct gbm_device_info *info)
287 {
288 if (!info)
289 return -EINVAL;
290 memset(info, 0, sizeof(*info));
291 info->dri_node_num = fd_node_num(fd);
292 return detect_device_info(detect_flags, fd, info);
293 }
294
gbm_detect_device_info_path(unsigned int detect_flags,const char * dev_node,struct gbm_device_info * info)295 PUBLIC int gbm_detect_device_info_path(unsigned int detect_flags, const char *dev_node,
296 struct gbm_device_info *info)
297 {
298 char rendernode_name[64];
299 int fd;
300 int ret;
301
302 if (!info)
303 return -EINVAL;
304 memset(info, 0, sizeof(*info));
305 info->dri_node_num = dri_node_num(dev_node);
306
307 snprintf(rendernode_name, sizeof(rendernode_name), "/dev/dri/renderD%d",
308 info->dri_node_num + 128);
309 fd = open(rendernode_name, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
310 if (fd < 0)
311 return -errno;
312 ret = detect_device_info(detect_flags, fd, info);
313 close(fd);
314 return ret;
315 }
316
try_drm_devices(drmDevicePtr * devs,int dev_count,int type,int * out_fd)317 static struct gbm_device *try_drm_devices(drmDevicePtr *devs, int dev_count, int type, int *out_fd)
318 {
319 int i;
320
321 for (i = 0; i < dev_count; i++) {
322 drmDevicePtr dev = devs[i];
323 int fd;
324
325 if (!(dev->available_nodes & (1 << type)))
326 continue;
327
328 fd = open(dev->nodes[type], O_RDWR | O_CLOEXEC);
329 if (fd >= 0) {
330 struct gbm_device *gbm = gbm_create_device(fd);
331 if (gbm) {
332 // DRM master might be taken by accident on a primary node even
333 // if master is not needed for GBM. Drop it so that programs
334 // that actually need DRM master (e.g. Chrome) won't be blocked.
335 if (type == DRM_NODE_PRIMARY && drmIsMaster(fd))
336 drmDropMaster(fd);
337 *out_fd = fd;
338 return gbm;
339 }
340 close(fd);
341 }
342 }
343
344 return NULL;
345 }
346
minigbm_create_default_device(int * out_fd)347 PUBLIC struct gbm_device *minigbm_create_default_device(int *out_fd)
348 {
349 struct gbm_device *gbm;
350 drmDevicePtr devs[64];
351 int dev_count;
352 int fd;
353
354 /* try gbm_get_default_device_fd first */
355 fd = gbm_get_default_device_fd();
356 if (fd >= 0) {
357 gbm = gbm_create_device(fd);
358 if (gbm) {
359 *out_fd = fd;
360 return gbm;
361 }
362 close(fd);
363 }
364
365 dev_count = drmGetDevices2(0, devs, sizeof(devs) / sizeof(devs[0]));
366
367 /* try render nodes and then primary nodes */
368 gbm = try_drm_devices(devs, dev_count, DRM_NODE_RENDER, out_fd);
369 if (!gbm)
370 gbm = try_drm_devices(devs, dev_count, DRM_NODE_PRIMARY, out_fd);
371
372 drmFreeDevices(devs, dev_count);
373
374 return gbm;
375 }
376