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("+-> 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 } 106 107 int 108 main(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