// SPDX-License-Identifier: MIT
/*
* Copyright �� 2021 Intel Corporation
*/
#include "gt/intel_gt_print.h"
#include "intel_guc_print.h"
#include "selftests/igt_spinner.h"
#include "selftests/intel_scheduler_helpers.h"
static int request_add_spin(struct i915_request *rq, struct igt_spinner *spin)
{
int err = 0;
i915_request_get(rq);
i915_request_add(rq);
if (spin && !igt_wait_for_spinner(spin, rq))
err = -ETIMEDOUT;
return err;
}
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;
if (!intel_has_gpu_reset(gt))
return 0;
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);
gt_err(gt, "Failed to create context %d: %pe\n", i, ce);
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);
gt_err(gt, "Failed to create request %d: %pe\n", i, rq);
goto err;
}
last[i] = rq;
}
for (i = 0; i < 3; ++i) {
ret = i915_request_wait(last[i], 0, HZ);
if (ret < 0) {
gt_err(gt, "Last request failed to complete: %pe\n", ERR_PTR(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) {
gt_err(gt, "GT failed to idle: %pe\n", ERR_PTR(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;
}
/*
* intel_guc_steal_guc_ids - Test to exhaust all guc_ids and then steal one
*
* This test creates a spinner which is used to block all subsequent submissions
* until it completes. Next, a loop creates a context and a NOP request each
* iteration until the guc_ids are exhausted (request creation returns -EAGAIN).
* The spinner is ended, unblocking all requests created in the loop. At this
* point all guc_ids are exhausted but are available to steal. Try to create
* another request which should successfully steal a guc_id. Wait on last
* request to complete, idle GPU, verify a guc_id was stolen via a counter, and
* exit the test. Test also artificially reduces the number of guc_ids so the
* test runs in a timely manner.
*/
static int intel_guc_steal_guc_ids(void *arg)
{
struct intel_gt *gt = arg;
struct intel_guc *guc = gt_to_guc(gt);
int ret, sv, context_index = 0;
intel_wakeref_t wakeref;
struct intel_engine_cs *engine;
struct intel_context **ce;
struct igt_spinner spin;
struct i915_request *spin_rq = NULL, *rq, *last = NULL;
int number_guc_id_stolen = guc->number_guc_id_stolen;
ce = kcalloc(GUC_MAX_CONTEXT_ID, sizeof(*ce), GFP_KERNEL);
if (!ce) {
guc_err(guc, "Context array allocation failed\n");
return -ENOMEM;
}
wakeref = intel_runtime_pm_get(gt->uncore->rpm);
engine = intel_selftest_find_any_engine(gt);
sv = guc->submission_state.num_guc_ids;
guc->submission_state.num_guc_ids = 512;
/* Create spinner to block requests in below loop */
ce[context_index] = intel_context_create(engine);
if (IS_ERR(ce[context_index])) {
ret = PTR_ERR(ce[context_index]);
guc_err(guc, "Failed to create context: %pe\n", ce[context_index]);
ce[context_index] = NULL;
goto err_wakeref;
}
ret = igt_spinner_init(&spin, engine->gt);
if (ret) {
guc_err(guc, "Failed to create spinner: %pe\n", ERR_PTR(ret));
goto err_contexts;
}
spin_rq = igt_spinner_create_request(&spin, ce[context_index],
MI_ARB_CHECK);
if (IS_ERR(spin_rq)) {
ret = PTR_ERR(spin_rq);
guc_err(guc, "Failed to create spinner request: %pe\n", spin_rq);
goto err_contexts;
}
ret = request_add_spin(spin_rq, &spin);
if (ret) {
guc_err(guc, "Failed to add Spinner request: %pe\n", ERR_PTR(ret));
goto err_spin_rq;
}
/* Use all guc_ids */
while (ret != -EAGAIN) {
ce[++context_index] = intel_context_create(engine);
if (IS_ERR(ce[context_index])) {
ret = PTR_ERR(ce[context_index]);
guc_err(guc, "Failed to create context: %pe\n", ce[context_index]);
ce[context_index--] = NULL;
goto err_spin_rq;
}
rq = nop_user_request(ce[context_index], spin_rq);
if (IS_ERR(rq)) {
ret = PTR_ERR(rq);
rq = NULL;
if ((ret != -EAGAIN) || !last) {
guc_err(guc, "Failed to create %srequest %d: %pe\n",
last ? "" : "first ", context_index, ERR_PTR(ret));
goto err_spin_rq;
}
} else {
if (last)
i915_request_put(last);
last = rq;
}
}
/* Release blocked requests */
igt_spinner_end(&spin);
ret = intel_selftest_wait_for_rq(spin_rq);
if (ret) {
guc_err(guc, "Spin request failed to complete: %pe\n", ERR_PTR(ret));
i915_request_put(last);
goto err_spin_rq;
}
i915_request_put(spin_rq);
igt_spinner_fini(&spin);
spin_rq = NULL;
/* Wait for last request */
ret = i915_request_wait(last, 0, HZ * 30);
i915_request_put(last);
if (ret < 0) {
guc_err(guc, "Last request failed to complete: %pe\n", ERR_PTR(ret));
goto err_spin_rq;
}
/* Try to steal guc_id */
rq = nop_user_request(ce[context_index], NULL);
if (IS_ERR(rq)) {
ret = PTR_ERR(rq);
guc_err(guc, "Failed to steal guc_id %d: %pe\n", context_index, rq);
goto err_spin_rq;
}
/* Wait for request with stolen guc_id */
ret = i915_request_wait(rq, 0, HZ);
i915_request_put(rq);
if (ret < 0) {
guc_err(guc, "Request with stolen guc_id failed to complete: %pe\n", ERR_PTR(ret));
goto err_spin_rq;
}
/* Wait for idle */
ret = intel_gt_wait_for_idle(gt, HZ * 30);
if (ret < 0) {
guc_err(guc, "GT failed to idle: %pe\n", ERR_PTR(ret));
goto err_spin_rq;
}
/* Verify a guc_id was stolen */
if (guc->number_guc_id_stolen == number_guc_id_stolen) {
guc_err(guc, "No guc_id was stolen");
ret = -EINVAL;
} else {
ret = 0;
}
err_spin_rq:
if (spin_rq) {
igt_spinner_end(&spin);
intel_selftest_wait_for_rq(spin_rq);
i915_request_put(spin_rq);
igt_spinner_fini(&spin);
intel_gt_wait_for_idle(gt, HZ * 30);
}
err_contexts:
for (; context_index >= 0 && ce[context_index]; --context_index)
intel_context_put(ce[context_index]);
err_wakeref:
intel_runtime_pm_put(gt->uncore->rpm, wakeref);
kfree(ce);
guc->submission_state.num_guc_ids = sv;
return ret;
}
/*
* Send a context schedule H2G message with an invalid context id.
* This should generate a GUC_RESULT_INVALID_CONTEXT response.
*/
static int bad_h2g(struct intel_guc *guc)
{
u32 action[] = {
INTEL_GUC_ACTION_SCHED_CONTEXT,
0x12345678,
};
return intel_guc_send_nb(guc, action, ARRAY_SIZE(action), 0);
}
/*
* Set a spinner running to make sure the system is alive and active,
* then send a bad but asynchronous H2G command and wait to see if an
* error response is returned. If no response is received or if the
* spinner dies then the test will fail.
*/
#define FAST_RESPONSE_TIMEOUT_MS 1000
static int intel_guc_fast_request(void *arg)
{
struct intel_gt *gt = arg;
struct intel_context *ce;
struct igt_spinner spin;
struct i915_request *rq;
intel_wakeref_t wakeref;
struct intel_engine_cs *engine = intel_selftest_find_any_engine(gt);
bool spinning = false;
int ret = 0;
if (!engine)
return 0;
wakeref = intel_runtime_pm_get(gt->uncore->rpm);
ce = intel_context_create(engine);
if (IS_ERR(ce)) {
ret = PTR_ERR(ce);
gt_err(gt, "Failed to create spinner request: %pe\n", ce);
goto err_pm;
}
ret = igt_spinner_init(&spin, engine->gt);
if (ret) {
gt_err(gt, "Failed to create spinner: %pe\n", ERR_PTR(ret));
goto err_pm;
}
spinning = true;
rq = igt_spinner_create_request(&spin, ce, MI_ARB_CHECK);
intel_context_put(ce);
if (IS_ERR(rq)) {
ret = PTR_ERR(rq);
gt_err(gt, "Failed to create spinner request: %pe\n", rq);
goto err_spin;
}
ret = request_add_spin(rq, &spin);
if (ret) {
gt_err(gt, "Failed to add Spinner request: %pe\n", ERR_PTR(ret));
goto err_rq;
}
gt->uc.guc.fast_response_selftest = 1;
ret = bad_h2g(>->uc.guc);
if (ret) {
gt_err(gt, "Failed to send H2G: %pe\n", ERR_PTR(ret));
goto err_rq;
}
ret = wait_for(gt->uc.guc.fast_response_selftest != 1 || i915_request_completed(rq),
FAST_RESPONSE_TIMEOUT_MS);
if (ret) {
gt_err(gt, "Request wait failed: %pe\n", ERR_PTR(ret));
goto err_rq;
}
if (i915_request_completed(rq)) {
gt_err(gt, "Spinner died waiting for fast request error!\n");
ret = -EIO;
goto err_rq;
}
if (gt->uc.guc.fast_response_selftest != 2) {
gt_err(gt, "Unexpected fast response count: %d\n",
gt->uc.guc.fast_response_selftest);
goto err_rq;
}
igt_spinner_end(&spin);
spinning = false;
ret = intel_selftest_wait_for_rq(rq);
if (ret) {
gt_err(gt, "Request failed to complete: %pe\n", ERR_PTR(ret));
goto err_rq;
}
err_rq:
i915_request_put(rq);
err_spin:
if (spinning)
igt_spinner_end(&spin);
igt_spinner_fini(&spin);
err_pm:
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),
SUBTEST(intel_guc_steal_guc_ids),
SUBTEST(intel_guc_fast_request),
};
struct intel_gt *gt = to_gt(i915);
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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