1 /*
2  * Copyright (c) 2015 Emil Velikov <emil.l.velikov@gmail.com>
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
20  * IN THE SOFTWARE.
21  *
22  */
23 
24 #include <errno.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <stdbool.h>
28 #include <string.h>
29 #include <sys/stat.h>
30 #include <fcntl.h>
31 #include <unistd.h>
32 #include <xf86drm.h>
33 
34 
35 static void
36 print_device_info(drmDevicePtr device, int i, bool print_revision)
37 {
38     printf("device[%i]\n", i);
39     printf("\tavailable_nodes %04x\n", device->available_nodes);
40     printf("\tnodes\n");
41     for (int j = 0; j < DRM_NODE_MAX; j++)
42         if (device->available_nodes & 1 << j)
43             printf("\t\tnodes[%d] %s\n", j, device->nodes[j]);
44 
45     printf("\tbustype %04x\n", device->bustype);
46     printf("\tbusinfo\n");
47     if (device->bustype == DRM_BUS_PCI) {
48         printf("\t\tpci\n");
49         printf("\t\t\tdomain\t%04x\n",device->businfo.pci->domain);
50         printf("\t\t\tbus\t%02x\n", device->businfo.pci->bus);
51         printf("\t\t\tdev\t%02x\n", device->businfo.pci->dev);
52         printf("\t\t\tfunc\t%1u\n", device->businfo.pci->func);
53 
54         printf("\tdeviceinfo\n");
55         printf("\t\tpci\n");
56         printf("\t\t\tvendor_id\t%04x\n", device->deviceinfo.pci->vendor_id);
57         printf("\t\t\tdevice_id\t%04x\n", device->deviceinfo.pci->device_id);
58         printf("\t\t\tsubvendor_id\t%04x\n", device->deviceinfo.pci->subvendor_id);
59         printf("\t\t\tsubdevice_id\t%04x\n", device->deviceinfo.pci->subdevice_id);
60         if (print_revision)
61             printf("\t\t\trevision_id\t%02x\n", device->deviceinfo.pci->revision_id);
62         else
63             printf("\t\t\trevision_id\tIGNORED\n");
64 
65     } else if (device->bustype == DRM_BUS_USB) {
66         printf("\t\tusb\n");
67         printf("\t\t\tbus\t%03u\n", device->businfo.usb->bus);
68         printf("\t\t\tdev\t%03u\n", device->businfo.usb->dev);
69 
70         printf("\tdeviceinfo\n");
71         printf("\t\tusb\n");
72         printf("\t\t\tvendor\t%04x\n", device->deviceinfo.usb->vendor);
73         printf("\t\t\tproduct\t%04x\n", device->deviceinfo.usb->product);
74     } else if (device->bustype == DRM_BUS_PLATFORM) {
75         char **compatible = device->deviceinfo.platform->compatible;
76 
77         printf("\t\tplatform\n");
78         printf("\t\t\tfullname\t%s\n", device->businfo.platform->fullname);
79 
80         printf("\tdeviceinfo\n");
81         printf("\t\tplatform\n");
82         printf("\t\t\tcompatible\n");
83 
84         while (*compatible) {
85             printf("\t\t\t\t%s\n", *compatible);
86             compatible++;
87         }
88     } else if (device->bustype == DRM_BUS_HOST1X) {
89         char **compatible = device->deviceinfo.platform->compatible;
90 
91         printf("\t\thost1x\n");
92         printf("\t\t\tfullname\t%s\n", device->businfo.host1x->fullname);
93 
94         printf("\tdeviceinfo\n");
95         printf("\t\tplatform\n");
96         printf("\t\t\tcompatible\n");
97 
98         while (*compatible) {
99             printf("\t\t\t\t%s\n", *compatible);
100             compatible++;
101         }
102     } else {
103         printf("Unknown/unhandled bustype\n");
104     }
105     printf("\n");
106 }
107 
108 int
109 main(void)
110 {
111     drmDevicePtr *devices;
112     drmDevicePtr device;
113     int fd, ret, max_devices;
114 
115     max_devices = drmGetDevices2(0, NULL, 0);
116 
117     if (max_devices <= 0) {
118         printf("drmGetDevices2() has returned %d\n", max_devices);
119         return -1;
120     }
121 
122     devices = calloc(max_devices, sizeof(drmDevicePtr));
123     if (devices == NULL) {
124         printf("Failed to allocate memory for the drmDevicePtr array\n");
125         return -1;
126     }
127 
128     ret = drmGetDevices2(0, devices, max_devices);
129     if (ret < 0) {
130         printf("drmGetDevices2() returned an error %d\n", ret);
131         free(devices);
132         return -1;
133     }
134 
135     for (int i = 0; i < ret; i++) {
136         print_device_info(devices[i], i, false);
137 
138         for (int j = 0; j < DRM_NODE_MAX; j++) {
139             if (devices[i]->available_nodes & 1 << j) {
140                 printf("Opening device %d node %s\n", i, devices[i]->nodes[j]);
141                 fd = open(devices[i]->nodes[j], O_RDONLY | O_CLOEXEC, 0);
142                 if (fd < 0) {
143                     printf("Failed - %s (%d)\n", strerror(errno), errno);
144                     continue;
145                 }
146 
147                 if (drmGetDevice2(fd, DRM_DEVICE_GET_PCI_REVISION, &device) == 0) {
148                     print_device_info(device, i, true);
149                     drmFreeDevice(&device);
150                 }
151                 close(fd);
152             }
153         }
154     }
155 
156     drmFreeDevices(devices, ret);
157     free(devices);
158     return 0;
159 }
160