Commit eb7d60e4 authored by Chris Wilson's avatar Chris Wilson 😣

igt: Add gem_eio for inducing expected EIO

A few entry points in the GEM API are expected to raise EIO if we
encounter a wedged GPU. This testcase aims to do so by first injecting a
GPU hang with GPU resets disabled (thus causing the GPU to become wedged)
and then exercises the various API to check for the expected errors.
Signed-off-by: Chris Wilson's avatarChris Wilson <chris@chris-wilson.co.uk>
parent 4fbce7e4
......@@ -36,6 +36,7 @@ gem_ctx_thrash
gem_ctx_param_basic
gem_double_irq_loop
gem_dummy_reloc_loop
gem_eio
gem_evict_alignment
gem_evict_everything
gem_exec_bad_domains
......
......@@ -20,6 +20,7 @@ TESTS_progs_M = \
gem_ctx_bad_exec \
gem_ctx_exec \
gem_dummy_reloc_loop \
gem_eio \
gem_evict_alignment \
gem_evict_everything \
gem_exec_bad_domains \
......
/*
* Copyright © 2015 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.
*
*/
/*
* Testcase: Test that only specific ioctl report a wedged GPU.
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <inttypes.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <drm.h>
#include "drmtest.h"
#include "ioctl_wrappers.h"
#include "igt_core.h"
#include "igt_aux.h"
#include "igt_gt.h"
IGT_TEST_DESCRIPTION("Test that specific ioctls report a wedged GPU (EIO).");
static bool i915_reset_control(bool enable)
{
const char *path = "/sys/module/i915/parameters/reset";
int fd, ret;
igt_debug("%s GPU reset\n", enable ? "Enabling" : "Disabling");
fd = open(path, O_RDWR);
igt_require(fd >= 0);
ret = write(fd, &"NY"[enable], 1) == 1;
close(fd);
return ret;
}
static bool i915_wedged_set(void)
{
int fd, ret;
igt_debug("Triggering GPU reset\n");
fd = igt_debugfs_open("i915_wedged", O_RDWR);
igt_require(fd >= 0);
ret = write(fd, "1\n", 2) == 2;
close(fd);
return ret;
}
static void trigger_reset(int fd)
{
igt_assert(i915_wedged_set());
/* And just check the gpu is indeed running again */
igt_debug("Checking that the GPU recovered\n");
gem_quiescent_gpu(fd);
}
static void wedge_gpu(int fd)
{
/* First idle the GPU then disable GPU resets before injecting a hang */
gem_quiescent_gpu(fd);
igt_require(i915_reset_control(false));
igt_debug("Wedging GPU by injecting hang\n");
igt_post_hang_ring(fd, igt_hang_ring(fd, I915_EXEC_DEFAULT));
igt_assert(i915_reset_control(true));
}
static int __gem_throttle(int fd)
{
int err = 0;
if (drmIoctl(fd, DRM_IOCTL_I915_GEM_THROTTLE, NULL))
err = -errno;
return err;
}
static void test_throttle(int fd)
{
wedge_gpu(fd);
igt_assert_eq(__gem_throttle(fd), -EIO);
trigger_reset(fd);
}
static int __gem_execbuf(int fd, struct drm_i915_gem_execbuffer2 *eb)
{
int err = 0;
if (drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, eb))
err = -errno;
return err;
}
static void test_execbuf(int fd)
{
struct drm_i915_gem_execbuffer2 execbuf;
struct drm_i915_gem_exec_object2 exec;
uint32_t tmp[] = { MI_BATCH_BUFFER_END };
memset(&exec, 0, sizeof(exec));
memset(&execbuf, 0, sizeof(execbuf));
exec.handle = gem_create(fd, 4096);
gem_write(fd, exec.handle, 0, tmp, sizeof(tmp));
execbuf.buffers_ptr = (uintptr_t)&exec;
execbuf.buffer_count = 1;
wedge_gpu(fd);
igt_assert_eq(__gem_execbuf(fd, &execbuf), -EIO);
gem_close(fd, exec.handle);
trigger_reset(fd);
}
igt_main
{
int fd;
igt_skip_on_simulation();
igt_fixture {
fd = drm_open_any();
igt_require_hang_ring(fd, -1);
}
igt_subtest("throttle")
test_throttle(fd);
igt_subtest("execbuf")
test_execbuf(fd);
igt_fixture
close(fd);
}
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