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/*
* Copyright © 2007,2014,2020 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
*/
#include <fcntl.h>
#include <sys/ioctl.h>
#include "i915/gem.h"
#include "igt.h"
#include "igt_debugfs.h"
#include "igt_sysfs.h"
static void reset_device(int i915)
{
int dir;
dir = igt_debugfs_dir(i915);
igt_require(dir >= 0);
if (ioctl(i915, DRM_IOCTL_I915_GEM_THROTTLE)) {
igt_info("Found wedged device, trying to reset and continue\n");
igt_sysfs_set(dir, "i915_wedged", "-1");
}
igt_sysfs_set(dir, "i915_next_seqno", "1");
close(dir);
}
void igt_require_gem(int i915)
{
int err;
igt_require_intel(i915);
/*
* We only want to use the throttle-ioctl for its -EIO reporting
* of a wedged device, not for actually waiting on outstanding
* requests! So create a new drm_file for the device that is clean.
*/
i915 = gem_reopen_driver(i915);
/*
* Reset the global seqno at the start of each test. This ensures that
* the test will not wrap unless it explicitly sets up seqno wrapping
* itself, which avoids accidentally hanging when setting up long
* sequences of batches.
*/
reset_device(i915);
err = 0;
if (ioctl(i915, DRM_IOCTL_I915_GEM_THROTTLE)) {
err = -errno;
igt_assume(err);
}
close(i915);
igt_require_f(err == 0, "Unresponsive i915/GEM device\n");
}
/**
* gem_quiescent_gpu:
* @i915: open i915 drm file descriptor
*
* Ensure the gpu is idle by launching a nop execbuf and stalling for it. This
* is automatically run when opening a drm device node and is also installed as
* an exit handler to have the best assurance that the test is run in a pristine
* and controlled environment.
*
* This function simply allows tests to make additional calls in-between, if so
* desired.
*/
void gem_quiescent_gpu(int i915)
{
igt_terminate_spins();
igt_drop_caches_set(i915,
DROP_ACTIVE | DROP_RETIRE | DROP_IDLE | DROP_FREED);
}
/**
* gem_reopen_driver:
* @i915: re-open the i915 drm file descriptor
*
* Re-opens the drm fd which is useful in instances where a clean default
* context is needed.
*/
int gem_reopen_driver(int i915)
{
char path[256];
snprintf(path, sizeof(path), "/proc/self/fd/%d", i915);
i915 = open(path, O_RDWR);
igt_assert_fd(i915);
return i915;
}
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