mirror of https://gitlab.freedesktop.org/mesa/mesa
119 lines
3.4 KiB
C
119 lines
3.4 KiB
C
/*
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* Copyright © 2019 Red Hat
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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
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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/* connect to an X server and work out the default device. */
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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 <stdlib.h>
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#include <fcntl.h>
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#include <xf86drm.h>
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#include "device_select.h"
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static int
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ds_dri3_open(xcb_connection_t *conn,
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xcb_window_t root,
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uint32_t provider)
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{
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xcb_dri3_open_cookie_t cookie;
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xcb_dri3_open_reply_t *reply;
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int fd;
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cookie = xcb_dri3_open(conn,
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root,
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provider);
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reply = xcb_dri3_open_reply(conn, 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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free(reply);
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return -1;
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}
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fd = xcb_dri3_open_reply_fds(conn, reply)[0];
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free(reply);
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fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
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return fd;
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}
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int device_select_find_xcb_pci_default(struct device_pci_info *devices, uint32_t device_count)
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{
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const xcb_setup_t *setup;
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xcb_screen_iterator_t iter;
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int scrn;
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xcb_connection_t *conn;
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int default_idx = -1;
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conn = xcb_connect(NULL, &scrn);
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if (!conn)
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return -1;
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xcb_query_extension_cookie_t dri3_cookie;
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xcb_query_extension_reply_t *dri3_reply;
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dri3_cookie = xcb_query_extension(conn, 4, "DRI3");
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dri3_reply = xcb_query_extension_reply(conn, dri3_cookie, NULL);
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if (!dri3_reply)
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goto out;
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if (dri3_reply->present == 0)
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goto out;
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setup = xcb_get_setup(conn);
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iter = xcb_setup_roots_iterator(setup);
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xcb_screen_t *screen = iter.data;
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int dri3_fd = ds_dri3_open(conn, screen->root, 0);
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if (dri3_fd == -1)
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goto out;
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drmDevicePtr xdev;
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int ret = drmGetDevice2(dri3_fd, 0, &xdev);
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if (ret < 0)
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goto out;
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for (unsigned i = 0; i < device_count; i++) {
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if (devices[i].has_bus_info) {
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if (xdev->businfo.pci->domain == devices[i].bus_info.domain &&
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xdev->businfo.pci->bus == devices[i].bus_info.bus &&
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xdev->businfo.pci->dev == devices[i].bus_info.dev &&
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xdev->businfo.pci->func == devices[i].bus_info.func) {
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default_idx = i;
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}
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} else {
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if (xdev->deviceinfo.pci->vendor_id == devices[i].dev_info.vendor_id &&
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xdev->deviceinfo.pci->device_id == devices[i].dev_info.device_id)
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default_idx = i;
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}
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if (default_idx != -1)
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break;
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}
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out:
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xcb_disconnect(conn);
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return default_idx;
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}
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