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 Høgsberg <krh@bitplanet.net>
29 *    Benjamin Franzke <benjaminfranzke@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
54struct 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
62static boolean
63find_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
103static boolean
104find_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
134static struct pipe_loader_ops pipe_loader_drm_ops;
135
136static void
137pipe_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
183disconnect:
184   xcb_disconnect(xcb_conn);
185
186#endif
187}
188
189boolean
190pipe_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
214static int
215open_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
222int
223pipe_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
241static void
242pipe_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
254static struct pipe_screen *
255pipe_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
276static struct pipe_loader_ops pipe_loader_drm_ops = {
277   .create_screen = pipe_loader_drm_create_screen,
278   .release = pipe_loader_drm_release
279};
280