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// SPDX-License-Identifier: MIT
/*
* Copyright © 2024 Intel Corporation
*/
/**
* TEST: cause fake gt reset failure which put Xe device in wedged state
* Category: Software building block
* Sub-category: driver
* Functionality: wedged
* Test category: functionality test
*/
#include <limits.h>
#include <dirent.h>
#include "igt.h"
#include "igt_device.h"
#include "igt_kmod.h"
#include "igt_sysfs.h"
#include "xe/xe_ioctl.h"
static void force_wedged(int fd)
{
igt_debugfs_write(fd, "fail_gt_reset/probability", "100");
igt_debugfs_write(fd, "fail_gt_reset/times", "2");
xe_force_gt_reset(fd, 0);
sleep(1);
}
static int rebind_xe(int fd)
{
char pci_slot[NAME_MAX];
int sysfs;
igt_device_get_pci_slot_name(fd, pci_slot);
sysfs = open("/sys/bus/pci/drivers/xe", O_DIRECTORY);
igt_assert(sysfs);
igt_assert(igt_sysfs_set(sysfs, "unbind", pci_slot));
/*
* We need to close the client for a proper release, before
* binding back again.
*/
close(fd);
igt_assert(igt_sysfs_set(sysfs, "bind", pci_slot));
close(sysfs);
/* Renew the client connection */
fd = drm_open_driver(DRIVER_XE);
igt_assert(fd);
return fd;
}
static int simple_ioctl(int fd)
{
int ret;
struct drm_xe_vm_create create = {
.extensions = 0,
.flags = 0,
};
ret = igt_ioctl(fd, DRM_IOCTL_XE_VM_CREATE, &create);
if (ret == 0)
xe_vm_destroy(fd, create.vm_id);
return ret;
}
/**
* SUBTEST: basic-wedged
* Description: Force Xe device wedged after injecting a failure in GT reset
*/
igt_main
{
int fd;
igt_fixture {
fd = drm_open_driver(DRIVER_XE);
}
igt_subtest("basic-wedged") {
igt_require(igt_debugfs_exists(fd, "fail_gt_reset/probability",
O_RDWR));
igt_assert_eq(simple_ioctl(fd), 0);
force_wedged(fd);
igt_assert_neq(simple_ioctl(fd), 0);
fd = rebind_xe(fd);
igt_assert_eq(simple_ioctl(fd), 0);
}
igt_fixture {
if (igt_debugfs_exists(fd, "fail_gt_reset/probability", O_RDWR)) {
igt_debugfs_write(fd, "fail_gt_reset/probability", "0");
igt_debugfs_write(fd, "fail_gt_reset/times", "1");
}
drm_close_driver(fd);
}
}
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