1 /************************************************************************** 2 * 3 * Copyright 2011 Intel Corporation 4 * Copyright 2012 Francisco Jerez 5 * All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, sub license, and/or sell copies of the Software, and to 12 * permit persons to whom the Software is furnished to do so, subject to 13 * the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the 16 * next paragraph) shall be included in all copies or substantial portions 17 * of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR 23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26 * 27 * Authors: 28 * Kristian Hgsberg <krh (at) bitplanet.net> 29 * Benjamin Franzke <benjaminfranzke (at) googlemail.com> 30 * 31 **************************************************************************/ 32 33 #include <fcntl.h> 34 #include <stdio.h> 35 #include <libudev.h> 36 #include <xf86drm.h> 37 38 #ifdef PIPE_LOADER_HAVE_XCB 39 40 #include <xcb/dri2.h> 41 42 #endif 43 44 #include "state_tracker/drm_driver.h" 45 #include "pipe_loader_priv.h" 46 47 #include "util/u_memory.h" 48 #include "util/u_dl.h" 49 #include "util/u_debug.h" 50 51 #define DRIVER_MAP_GALLIUM_ONLY 52 #include "pci_ids/pci_id_driver_map.h" 53 54 struct pipe_loader_drm_device { 55 struct pipe_loader_device base; 56 struct util_dl_library *lib; 57 int fd; 58 }; 59 60 #define pipe_loader_drm_device(dev) ((struct pipe_loader_drm_device *)dev) 61 62 static boolean 63 find_drm_pci_id(struct pipe_loader_drm_device *ddev) 64 { 65 struct udev *udev = NULL; 66 struct udev_device *parent, *device = NULL; 67 struct stat stat; 68 const char *pci_id; 69 70 if (fstat(ddev->fd, &stat) < 0) 71 goto fail; 72 73 udev = udev_new(); 74 if (!udev) 75 goto fail; 76 77 device = udev_device_new_from_devnum(udev, 'c', stat.st_rdev); 78 if (!device) 79 goto fail; 80 81 parent = udev_device_get_parent(device); 82 if (!parent) 83 goto fail; 84 85 pci_id = udev_device_get_property_value(parent, "PCI_ID"); 86 if (!pci_id || 87 sscanf(pci_id, "%x:%x", &ddev->base.u.pci.vendor_id, 88 &ddev->base.u.pci.chip_id) != 2) 89 goto fail; 90 91 return TRUE; 92 93 fail: 94 if (device) 95 udev_device_unref(device); 96 if (udev) 97 udev_unref(udev); 98 99 debug_printf("pci id for fd %d not found\n", ddev->fd); 100 return FALSE; 101 } 102 103 static boolean 104 find_drm_driver_name(struct pipe_loader_drm_device *ddev) 105 { 106 struct pipe_loader_device *dev = &ddev->base; 107 int i, j; 108 109 for (i = 0; driver_map[i].driver; i++) { 110 if (dev->u.pci.vendor_id != driver_map[i].vendor_id) 111 continue; 112 113 if (driver_map[i].num_chips_ids == -1) { 114 dev->driver_name = driver_map[i].driver; 115 goto found; 116 } 117 118 for (j = 0; j < driver_map[i].num_chips_ids; j++) { 119 if (dev->u.pci.chip_id == driver_map[i].chip_ids[j]) { 120 dev->driver_name = driver_map[i].driver; 121 goto found; 122 } 123 } 124 } 125 126 return FALSE; 127 128 found: 129 debug_printf("driver for %04x:%04x: %s\n", dev->u.pci.vendor_id, 130 dev->u.pci.chip_id, dev->driver_name); 131 return TRUE; 132 } 133 134 static struct pipe_loader_ops pipe_loader_drm_ops; 135 136 static void 137 pipe_loader_drm_x_auth(int fd) 138 { 139 #if PIPE_LOADER_HAVE_XCB 140 /* Try authenticate with the X server to give us access to devices that X 141 * is running on. */ 142 xcb_connection_t *xcb_conn; 143 const xcb_setup_t *xcb_setup; 144 xcb_screen_iterator_t s; 145 xcb_dri2_connect_cookie_t connect_cookie; 146 xcb_dri2_connect_reply_t *connect; 147 drm_magic_t magic; 148 xcb_dri2_authenticate_cookie_t authenticate_cookie; 149 xcb_dri2_authenticate_reply_t *authenticate; 150 151 xcb_conn = xcb_connect(NULL, NULL); 152 153 if(!xcb_conn) 154 return; 155 156 xcb_setup = xcb_get_setup(xcb_conn); 157 158 if (!xcb_setup) 159 goto disconnect; 160 161 s = xcb_setup_roots_iterator(xcb_setup); 162 connect_cookie = xcb_dri2_connect_unchecked(xcb_conn, s.data->root, 163 XCB_DRI2_DRIVER_TYPE_DRI); 164 connect = xcb_dri2_connect_reply(xcb_conn, connect_cookie, NULL); 165 166 if (!connect || connect->driver_name_length 167 + connect->device_name_length == 0) { 168 169 goto disconnect; 170 } 171 172 if (drmGetMagic(fd, &magic)) 173 goto disconnect; 174 175 authenticate_cookie = xcb_dri2_authenticate_unchecked(xcb_conn, 176 s.data->root, 177 magic); 178 authenticate = xcb_dri2_authenticate_reply(xcb_conn, 179 authenticate_cookie, 180 NULL); 181 FREE(authenticate); 182 183 disconnect: 184 xcb_disconnect(xcb_conn); 185 186 #endif 187 } 188 189 boolean 190 pipe_loader_drm_probe_fd(struct pipe_loader_device **dev, int fd) 191 { 192 struct pipe_loader_drm_device *ddev = CALLOC_STRUCT(pipe_loader_drm_device); 193 194 ddev->base.type = PIPE_LOADER_DEVICE_PCI; 195 ddev->base.ops = &pipe_loader_drm_ops; 196 ddev->fd = fd; 197 198 pipe_loader_drm_x_auth(fd); 199 200 if (!find_drm_pci_id(ddev)) 201 goto fail; 202 203 if (!find_drm_driver_name(ddev)) 204 goto fail; 205 206 *dev = &ddev->base; 207 return TRUE; 208 209 fail: 210 FREE(ddev); 211 return FALSE; 212 } 213 214 static int 215 open_drm_minor(int minor) 216 { 217 char path[PATH_MAX]; 218 snprintf(path, sizeof(path), DRM_DEV_NAME, DRM_DIR_NAME, minor); 219 return open(path, O_RDWR, 0); 220 } 221 222 int 223 pipe_loader_drm_probe(struct pipe_loader_device **devs, int ndev) 224 { 225 int i, j, fd; 226 227 for (i = 0, j = 0; i < DRM_MAX_MINOR; i++) { 228 fd = open_drm_minor(i); 229 if (fd < 0) 230 continue; 231 232 if (j >= ndev || !pipe_loader_drm_probe_fd(&devs[j], fd)) 233 close(fd); 234 235 j++; 236 } 237 238 return j; 239 } 240 241 static void 242 pipe_loader_drm_release(struct pipe_loader_device **dev) 243 { 244 struct pipe_loader_drm_device *ddev = pipe_loader_drm_device(*dev); 245 246 if (ddev->lib) 247 util_dl_close(ddev->lib); 248 249 close(ddev->fd); 250 FREE(ddev); 251 *dev = NULL; 252 } 253 254 static struct pipe_screen * 255 pipe_loader_drm_create_screen(struct pipe_loader_device *dev, 256 const char *library_paths) 257 { 258 struct pipe_loader_drm_device *ddev = pipe_loader_drm_device(dev); 259 const struct drm_driver_descriptor *dd; 260 261 if (!ddev->lib) 262 ddev->lib = pipe_loader_find_module(dev, library_paths); 263 if (!ddev->lib) 264 return NULL; 265 266 dd = (const struct drm_driver_descriptor *) 267 util_dl_get_proc_address(ddev->lib, "driver_descriptor"); 268 269 /* sanity check on the name */ 270 if (!dd || strcmp(dd->name, ddev->base.driver_name) != 0) 271 return NULL; 272 273 return dd->create_screen(ddev->fd); 274 } 275 276 static struct pipe_loader_ops pipe_loader_drm_ops = { 277 .create_screen = pipe_loader_drm_create_screen, 278 .release = pipe_loader_drm_release 279 }; 280
