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115 lines
2.8 KiB
115 lines
2.8 KiB
/*
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* Copyright © 2017 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
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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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*/
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#include <sys/stat.h>
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#include <sys/sysmacros.h>
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#include "igt.h"
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#include "igt_device.h"
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int __igt_device_set_master(int fd)
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{
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int err;
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err = 0;
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if (drmIoctl(fd, DRM_IOCTL_SET_MASTER, NULL)) {
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err = -errno;
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igt_assume(err);
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}
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errno = 0;
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return err;
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}
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static void show_clients(int fd)
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{
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__igt_debugfs_dump(fd, "clients", IGT_LOG_WARN);
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}
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/**
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* igt_device_set_master: Set the device fd to be DRM master
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* @fd: the device
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*
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* Tell the kernel to make this device fd become DRM master or skip the test.
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*/
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void igt_device_set_master(int fd)
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{
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if (__igt_device_set_master(fd)) {
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show_clients(fd);
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igt_require_f(__igt_device_set_master(fd) == 0,
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"Can't become DRM master, "
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"please check if no other DRM client is running.\n");
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}
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}
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int __igt_device_drop_master(int fd)
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{
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int err;
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err = 0;
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if (drmIoctl(fd, DRM_IOCTL_DROP_MASTER, NULL)) {
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err = -errno;
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igt_assume(err);
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}
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errno = 0;
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return err;
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}
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/**
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* igt_device_drop_master: Drop DRM master
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* @fd: the device
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*
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* Tell the kernel we no longer want this device fd to be the DRM master;
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* asserting that we lose the privilege. Return if we are master already.
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*/
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void igt_device_drop_master(int fd)
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{
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/* Check if we are master before dropping */
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if (__igt_device_set_master(fd))
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return;
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if (__igt_device_drop_master(fd)) {
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show_clients(fd);
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igt_assert_f(__igt_device_drop_master(fd) == 0,
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"Failed to drop DRM master.\n");
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}
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}
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/**
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* igt_device_get_card_index:
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* @fd: the device
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*
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* Returns:
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* Index (N) of /dev/dri/cardN or /dev/dri/renderDN corresponding with fd.
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*
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*/
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int igt_device_get_card_index(int fd)
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{
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struct stat st;
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igt_fail_on(fstat(fd, &st) || !S_ISCHR(st.st_mode));
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return minor(st.st_rdev);
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}
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