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// SPDX-License-Identifier: MIT
/*
* Copyright �� 2021 Intel Corporation
*/
#include "selftests/intel_scheduler_helpers.h"
static struct i915_request *nop_user_request(struct intel_context *ce,
struct i915_request *from)
{
struct i915_request *rq;
int ret;
rq = intel_context_create_request(ce);
if (IS_ERR(rq))
return rq;
if (from) {
ret = i915_sw_fence_await_dma_fence(&rq->submit,
&from->fence, 0,
I915_FENCE_GFP);
if (ret < 0) {
i915_request_put(rq);
return ERR_PTR(ret);
}
}
i915_request_get(rq);
i915_request_add(rq);
return rq;
}
static int intel_guc_scrub_ctbs(void *arg)
{
struct intel_gt *gt = arg;
int ret = 0;
int i;
struct i915_request *last[3] = {NULL, NULL, NULL}, *rq;
intel_wakeref_t wakeref;
struct intel_engine_cs *engine;
struct intel_context *ce;
wakeref = intel_runtime_pm_get(gt->uncore->rpm);
engine = intel_selftest_find_any_engine(gt);
/* Submit requests and inject errors forcing G2H to be dropped */
for (i = 0; i < 3; ++i) {
ce = intel_context_create(engine);
if (IS_ERR(ce)) {
ret = PTR_ERR(ce);
pr_err("Failed to create context, %d: %d\n", i, ret);
goto err;
}
switch (i) {
case 0:
ce->drop_schedule_enable = true;
break;
case 1:
ce->drop_schedule_disable = true;
break;
case 2:
ce->drop_deregister = true;
break;
}
rq = nop_user_request(ce, NULL);
intel_context_put(ce);
if (IS_ERR(rq)) {
ret = PTR_ERR(rq);
pr_err("Failed to create request, %d: %d\n", i, ret);
goto err;
}
last[i] = rq;
}
for (i = 0; i < 3; ++i) {
ret = i915_request_wait(last[i], 0, HZ);
if (ret < 0) {
pr_err("Last request failed to complete: %d\n", ret);
goto err;
}
i915_request_put(last[i]);
last[i] = NULL;
}
/* Force all H2G / G2H to be submitted / processed */
intel_gt_retire_requests(gt);
msleep(500);
/* Scrub missing G2H */
intel_gt_handle_error(engine->gt, -1, 0, "selftest reset");
/* GT will not idle if G2H are lost */
ret = intel_gt_wait_for_idle(gt, HZ);
if (ret < 0) {
pr_err("GT failed to idle: %d\n", ret);
goto err;
}
err:
for (i = 0; i < 3; ++i)
if (last[i])
i915_request_put(last[i]);
intel_runtime_pm_put(gt->uncore->rpm, wakeref);
return ret;
}
int intel_guc_live_selftests(struct drm_i915_private *i915)
{
static const struct i915_subtest tests[] = {
SUBTEST(intel_guc_scrub_ctbs),
};
struct intel_gt *gt = &i915->gt;
if (intel_gt_is_wedged(gt))
return 0;
if (!intel_uc_uses_guc_submission(>->uc))
return 0;
return intel_gt_live_subtests(tests, gt);
}
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