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
35static void
36print_device_info(drmDevicePtr device, int i, bool print_revision)
37{
38    printf("device[%i]\n", i);
39    printf("+-> available_nodes %#04x\n", device->available_nodes);
40    printf("+-> nodes\n");
41    for (int j = 0; j < DRM_NODE_MAX; j++)
42        if (device->available_nodes & 1 << j)
43            printf("|   +-> nodes[%d] %s\n", j, device->nodes[j]);
44
45    printf("+-> bustype %04x\n", device->bustype);
46    if (device->bustype == DRM_BUS_PCI) {
47        printf("|   +-> pci\n");
48        printf("|       +-> domain %04x\n",device->businfo.pci->domain);
49        printf("|       +-> bus    %02x\n", device->businfo.pci->bus);
50        printf("|       +-> dev    %02x\n", device->businfo.pci->dev);
51        printf("|       +-> func   %1u\n", device->businfo.pci->func);
52
53        printf("+-> deviceinfo\n");
54        printf("    +-> pci\n");
55        printf("        +-> vendor_id     %04x\n", device->deviceinfo.pci->vendor_id);
56        printf("        +-> device_id     %04x\n", device->deviceinfo.pci->device_id);
57        printf("        +-> subvendor_id  %04x\n", device->deviceinfo.pci->subvendor_id);
58        printf("        +-> subdevice_id  %04x\n", device->deviceinfo.pci->subdevice_id);
59        if (print_revision)
60            printf("        +-> revision_id   %02x\n", device->deviceinfo.pci->revision_id);
61        else
62            printf("        +-> revision_id   IGNORED\n");
63
64    } else if (device->bustype == DRM_BUS_USB) {
65        printf("|   +-> usb\n");
66        printf("|       +-> bus %03u\n", device->businfo.usb->bus);
67        printf("|       +-> dev %03u\n", device->businfo.usb->dev);
68
69        printf("+-> deviceinfo\n");
70        printf("    +-> usb\n");
71        printf("        +-> vendor  %04x\n", device->deviceinfo.usb->vendor);
72        printf("        +-> product %04x\n", device->deviceinfo.usb->product);
73    } else if (device->bustype == DRM_BUS_PLATFORM) {
74        char **compatible = device->deviceinfo.platform->compatible;
75
76        printf("|   +-> platform\n");
77        printf("|       +-> fullname\t%s\n", device->businfo.platform->fullname);
78
79        printf("+-> deviceinfo\n");
80        printf("    +-> platform\n");
81        printf("        +-> compatible\n");
82
83        while (*compatible) {
84            printf("                    %s\n", *compatible);
85            compatible++;
86        }
87    } else if (device->bustype == DRM_BUS_HOST1X) {
88        char **compatible = device->deviceinfo.host1x->compatible;
89
90        printf("|   +-> host1x\n");
91        printf("|       +-> fullname\t%s\n", device->businfo.host1x->fullname);
92
93        printf("+-> deviceinfo\n");
94        printf("    +-> host1x\n");
95        printf("        +-> compatible\n");
96
97        while (*compatible) {
98            printf("                    %s\n", *compatible);
99            compatible++;
100        }
101    } else {
102        printf("Unknown/unhandled bustype\n");
103    }
104    printf("\n");
105}
106
107int
108main(void)
109{
110    drmDevicePtr *devices;
111    drmDevicePtr device;
112    int fd, ret, max_devices;
113
114    printf("--- Checking the number of DRM device available ---\n");
115    max_devices = drmGetDevices2(0, NULL, 0);
116
117    if (max_devices <= 0) {
118        printf("drmGetDevices2() has not found any devices (errno=%d)\n",
119               -max_devices);
120        return 77;
121    }
122    printf("--- Devices reported %d ---\n", max_devices);
123
124
125    devices = calloc(max_devices, sizeof(drmDevicePtr));
126    if (devices == NULL) {
127        printf("Failed to allocate memory for the drmDevicePtr array\n");
128        return -1;
129    }
130
131    printf("--- Retrieving devices information (PCI device revision is ignored) ---\n");
132    ret = drmGetDevices2(0, devices, max_devices);
133    if (ret < 0) {
134        printf("drmGetDevices2() returned an error %d\n", ret);
135        free(devices);
136        return -1;
137    }
138
139    for (int i = 0; i < ret; i++) {
140        print_device_info(devices[i], i, false);
141
142        for (int j = 0; j < DRM_NODE_MAX; j++) {
143            if (devices[i]->available_nodes & 1 << j) {
144                printf("--- Opening device node %s ---\n", devices[i]->nodes[j]);
145                fd = open(devices[i]->nodes[j], O_RDONLY | O_CLOEXEC);
146                if (fd < 0) {
147                    printf("Failed - %s (%d)\n", strerror(errno), errno);
148                    continue;
149                }
150
151                printf("--- Retrieving device info, for node %s ---\n", devices[i]->nodes[j]);
152                if (drmGetDevice2(fd, DRM_DEVICE_GET_PCI_REVISION, &device) == 0) {
153                    print_device_info(device, i, true);
154                    drmFreeDevice(&device);
155                }
156                close(fd);
157            }
158        }
159    }
160
161    drmFreeDevices(devices, ret);
162    free(devices);
163    return 0;
164}
165