140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
/*
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* Copyright (c) 2015 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#include <X11/Xlib.h>
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#include <X11/Xlib-xcb.h>
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#include <xcb/xcb.h>
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#include <xcb/dri3.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <drm.h>
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#include <xf86drm.h>
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static int dri3_open(Display *dpy)
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{
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xcb_connection_t *c = XGetXCBConnection(dpy);
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xcb_dri3_open_cookie_t cookie;
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xcb_dri3_open_reply_t *reply;
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cookie = xcb_dri3_open(c, RootWindow(dpy, DefaultScreen(dpy)), None);
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reply = xcb_dri3_open_reply(c, cookie, NULL);
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if (!reply)
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return -1;
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if (reply->nfd != 1)
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return -1;
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return xcb_dri3_open_reply_fds(c, reply)[0];
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}
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static void get_device_path(int fd, char *buf, int len)
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{
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struct stat remote, local;
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int i;
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if (fstat(fd, &remote))
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goto out;
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for (i = 0; i < 16; i++) {
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snprintf(buf, len, "/dev/dri/card%d", i);
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if (stat(buf, &local))
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continue;
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if (local.st_mode == remote.st_mode &&
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local.st_rdev == remote.st_rdev)
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return;
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snprintf(buf, len, "/dev/dri/renderD%d", i + 128);
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if (stat(buf, &local))
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continue;
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if (local.st_mode == remote.st_mode &&
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local.st_rdev == remote.st_rdev)
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return;
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}
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out:
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strncpy(buf, "unknown path", len);
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}
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static void get_driver_name(int fd, char *name, int len)
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{
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drm_version_t version;
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memset(name, 0, len);
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memset(&version, 0, sizeof(version));
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version.name_len = len;
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version.name = name;
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(void)drmIoctl(fd, DRM_IOCTL_VERSION, &version);
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}
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static void info(const char *dpyname)
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{
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Display *dpy;
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int device;
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char device_path[1024];
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char driver_name[1024];
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dpy = XOpenDisplay(dpyname);
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if (dpy == NULL) {
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printf("Unable to connect to display '%s'\n",
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dpyname ?: getenv("DISPLAY") ?: "unset");
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return;
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}
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device = dri3_open(dpy);
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if (device < 0) {
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printf("Unable to connect to DRI3 on display '%s'\n",
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DisplayString(dpy));
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return;
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}
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get_device_path(device, device_path, sizeof(device_path));
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get_driver_name(device, driver_name, sizeof(driver_name));
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printf("Connected to DRI3 on display '%s', using fd %d: matches %s, driver %s\n",
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DisplayString(dpy), device, device_path, driver_name);
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XCloseDisplay(dpy);
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close(device);
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}
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int main(int argc, char **argv)
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{
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int i;
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if (argc > 1) {
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for (i = 1; i < argc; i++)
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info(argv[i]);
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} else
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info(NULL);
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return 0;
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}
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