intel_lrc.c
/*
* SPDX-License-Identifier: MIT
*
* Copyright © 2018 Intel Corporation
*/
#include "../i915_selftest.h"
#include "igt_flush_test.h"
#include "igt_spinner.h"
#include "i915_random.h"
#include "mock_context.h"
static int live_sanitycheck(void *arg)
{
struct drm_i915_private *i915 = arg;
struct intel_engine_cs *engine;
struct i915_gem_context *ctx;
enum intel_engine_id id;
struct igt_spinner spin;
int err = -ENOMEM;
if (!HAS_LOGICAL_RING_CONTEXTS(i915))
return 0;
mutex_lock(&i915->drm.struct_mutex);
intel_runtime_pm_get(i915);
if (igt_spinner_init(&spin, i915))
goto err_unlock;
ctx = kernel_context(i915);
if (!ctx)
goto err_spin;
for_each_engine(engine, i915, id) {
struct i915_request *rq;
rq = igt_spinner_create_request(&spin, ctx, engine, MI_NOOP);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
goto err_ctx;
}
i915_request_add(rq);
if (!igt_wait_for_spinner(&spin, rq)) {
GEM_TRACE("spinner failed to start\n");
GEM_TRACE_DUMP();
i915_gem_set_wedged(i915);
err = -EIO;
goto err_ctx;
}
igt_spinner_end(&spin);
if (igt_flush_test(i915, I915_WAIT_LOCKED)) {
err = -EIO;
goto err_ctx;
}
}
err = 0;
err_ctx:
kernel_context_close(ctx);
err_spin:
igt_spinner_fini(&spin);
err_unlock:
igt_flush_test(i915, I915_WAIT_LOCKED);
intel_runtime_pm_put(i915);
mutex_unlock(&i915->drm.struct_mutex);
return err;
}
static int live_preempt(void *arg)
{
struct drm_i915_private *i915 = arg;
struct i915_gem_context *ctx_hi, *ctx_lo;
struct igt_spinner spin_hi, spin_lo;
struct intel_engine_cs *engine;
enum intel_engine_id id;
int err = -ENOMEM;
if (!HAS_LOGICAL_RING_PREEMPTION(i915))
return 0;
mutex_lock(&i915->drm.struct_mutex);
intel_runtime_pm_get(i915);
if (igt_spinner_init(&spin_hi, i915))
goto err_unlock;
if (igt_spinner_init(&spin_lo, i915))
goto err_spin_hi;
ctx_hi = kernel_context(i915);
if (!ctx_hi)
goto err_spin_lo;
ctx_hi->sched.priority =
I915_USER_PRIORITY(I915_CONTEXT_MAX_USER_PRIORITY);
ctx_lo = kernel_context(i915);
if (!ctx_lo)
goto err_ctx_hi;
ctx_lo->sched.priority =
I915_USER_PRIORITY(I915_CONTEXT_MIN_USER_PRIORITY);
for_each_engine(engine, i915, id) {
struct i915_request *rq;
rq = igt_spinner_create_request(&spin_lo, ctx_lo, engine,
MI_ARB_CHECK);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
goto err_ctx_lo;
}
i915_request_add(rq);
if (!igt_wait_for_spinner(&spin_lo, rq)) {
GEM_TRACE("lo spinner failed to start\n");
GEM_TRACE_DUMP();
i915_gem_set_wedged(i915);
err = -EIO;
goto err_ctx_lo;
}
rq = igt_spinner_create_request(&spin_hi, ctx_hi, engine,
MI_ARB_CHECK);
if (IS_ERR(rq)) {
igt_spinner_end(&spin_lo);
err = PTR_ERR(rq);
goto err_ctx_lo;
}
i915_request_add(rq);
if (!igt_wait_for_spinner(&spin_hi, rq)) {
GEM_TRACE("hi spinner failed to start\n");
GEM_TRACE_DUMP();
i915_gem_set_wedged(i915);
err = -EIO;
goto err_ctx_lo;
}
igt_spinner_end(&spin_hi);
igt_spinner_end(&spin_lo);
if (igt_flush_test(i915, I915_WAIT_LOCKED)) {
err = -EIO;
goto err_ctx_lo;
}
}
err = 0;
err_ctx_lo:
kernel_context_close(ctx_lo);
err_ctx_hi:
kernel_context_close(ctx_hi);
err_spin_lo:
igt_spinner_fini(&spin_lo);
err_spin_hi:
igt_spinner_fini(&spin_hi);
err_unlock:
igt_flush_test(i915, I915_WAIT_LOCKED);
intel_runtime_pm_put(i915);
mutex_unlock(&i915->drm.struct_mutex);
return err;
}
static int live_late_preempt(void *arg)
{
struct drm_i915_private *i915 = arg;
struct i915_gem_context *ctx_hi, *ctx_lo;
struct igt_spinner spin_hi, spin_lo;
struct intel_engine_cs *engine;
struct i915_sched_attr attr = {};
enum intel_engine_id id;
int err = -ENOMEM;
if (!HAS_LOGICAL_RING_PREEMPTION(i915))
return 0;
mutex_lock(&i915->drm.struct_mutex);
intel_runtime_pm_get(i915);
if (igt_spinner_init(&spin_hi, i915))
goto err_unlock;
if (igt_spinner_init(&spin_lo, i915))
goto err_spin_hi;
ctx_hi = kernel_context(i915);
if (!ctx_hi)
goto err_spin_lo;
ctx_lo = kernel_context(i915);
if (!ctx_lo)
goto err_ctx_hi;
for_each_engine(engine, i915, id) {
struct i915_request *rq;
rq = igt_spinner_create_request(&spin_lo, ctx_lo, engine,
MI_ARB_CHECK);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
goto err_ctx_lo;
}
i915_request_add(rq);
if (!igt_wait_for_spinner(&spin_lo, rq)) {
pr_err("First context failed to start\n");
goto err_wedged;
}
rq = igt_spinner_create_request(&spin_hi, ctx_hi, engine,
MI_NOOP);
if (IS_ERR(rq)) {
igt_spinner_end(&spin_lo);
err = PTR_ERR(rq);
goto err_ctx_lo;
}
i915_request_add(rq);
if (igt_wait_for_spinner(&spin_hi, rq)) {
pr_err("Second context overtook first?\n");
goto err_wedged;
}
attr.priority = I915_USER_PRIORITY(I915_PRIORITY_MAX);
engine->schedule(rq, &attr);
if (!igt_wait_for_spinner(&spin_hi, rq)) {
pr_err("High priority context failed to preempt the low priority context\n");
GEM_TRACE_DUMP();
goto err_wedged;
}
igt_spinner_end(&spin_hi);
igt_spinner_end(&spin_lo);
if (igt_flush_test(i915, I915_WAIT_LOCKED)) {
err = -EIO;
goto err_ctx_lo;
}
}
err = 0;
err_ctx_lo:
kernel_context_close(ctx_lo);
err_ctx_hi:
kernel_context_close(ctx_hi);
err_spin_lo:
igt_spinner_fini(&spin_lo);
err_spin_hi:
igt_spinner_fini(&spin_hi);
err_unlock:
igt_flush_test(i915, I915_WAIT_LOCKED);
intel_runtime_pm_put(i915);
mutex_unlock(&i915->drm.struct_mutex);
return err;
err_wedged:
igt_spinner_end(&spin_hi);
igt_spinner_end(&spin_lo);
i915_gem_set_wedged(i915);
err = -EIO;
goto err_ctx_lo;
}
static int live_preempt_hang(void *arg)
{
struct drm_i915_private *i915 = arg;
struct i915_gem_context *ctx_hi, *ctx_lo;
struct igt_spinner spin_hi, spin_lo;
struct intel_engine_cs *engine;
enum intel_engine_id id;
int err = -ENOMEM;
if (!HAS_LOGICAL_RING_PREEMPTION(i915))
return 0;
if (!intel_has_reset_engine(i915))
return 0;
mutex_lock(&i915->drm.struct_mutex);
intel_runtime_pm_get(i915);
if (igt_spinner_init(&spin_hi, i915))
goto err_unlock;
if (igt_spinner_init(&spin_lo, i915))
goto err_spin_hi;
ctx_hi = kernel_context(i915);
if (!ctx_hi)
goto err_spin_lo;
ctx_hi->sched.priority = I915_CONTEXT_MAX_USER_PRIORITY;
ctx_lo = kernel_context(i915);
if (!ctx_lo)
goto err_ctx_hi;
ctx_lo->sched.priority = I915_CONTEXT_MIN_USER_PRIORITY;
for_each_engine(engine, i915, id) {
struct i915_request *rq;
if (!intel_engine_has_preemption(engine))
continue;
rq = igt_spinner_create_request(&spin_lo, ctx_lo, engine,
MI_ARB_CHECK);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
goto err_ctx_lo;
}
i915_request_add(rq);
if (!igt_wait_for_spinner(&spin_lo, rq)) {
GEM_TRACE("lo spinner failed to start\n");
GEM_TRACE_DUMP();
i915_gem_set_wedged(i915);
err = -EIO;
goto err_ctx_lo;
}
rq = igt_spinner_create_request(&spin_hi, ctx_hi, engine,
MI_ARB_CHECK);
if (IS_ERR(rq)) {
igt_spinner_end(&spin_lo);
err = PTR_ERR(rq);
goto err_ctx_lo;
}
init_completion(&engine->execlists.preempt_hang.completion);
engine->execlists.preempt_hang.inject_hang = true;
i915_request_add(rq);
if (!wait_for_completion_timeout(&engine->execlists.preempt_hang.completion,
HZ / 10)) {
pr_err("Preemption did not occur within timeout!");
GEM_TRACE_DUMP();
i915_gem_set_wedged(i915);
err = -EIO;
goto err_ctx_lo;
}
set_bit(I915_RESET_ENGINE + id, &i915->gpu_error.flags);
i915_reset_engine(engine, NULL);
clear_bit(I915_RESET_ENGINE + id, &i915->gpu_error.flags);
engine->execlists.preempt_hang.inject_hang = false;
if (!igt_wait_for_spinner(&spin_hi, rq)) {
GEM_TRACE("hi spinner failed to start\n");
GEM_TRACE_DUMP();
i915_gem_set_wedged(i915);
err = -EIO;
goto err_ctx_lo;
}
igt_spinner_end(&spin_hi);
igt_spinner_end(&spin_lo);
if (igt_flush_test(i915, I915_WAIT_LOCKED)) {
err = -EIO;
goto err_ctx_lo;
}
}
err = 0;
err_ctx_lo:
kernel_context_close(ctx_lo);
err_ctx_hi:
kernel_context_close(ctx_hi);
err_spin_lo:
igt_spinner_fini(&spin_lo);
err_spin_hi:
igt_spinner_fini(&spin_hi);
err_unlock:
igt_flush_test(i915, I915_WAIT_LOCKED);
intel_runtime_pm_put(i915);
mutex_unlock(&i915->drm.struct_mutex);
return err;
}
static int random_range(struct rnd_state *rnd, int min, int max)
{
return i915_prandom_u32_max_state(max - min, rnd) + min;
}
static int random_priority(struct rnd_state *rnd)
{
return random_range(rnd, I915_PRIORITY_MIN, I915_PRIORITY_MAX);
}
struct preempt_smoke {
struct drm_i915_private *i915;
struct i915_gem_context **contexts;
struct intel_engine_cs *engine;
struct drm_i915_gem_object *batch;
unsigned int ncontext;
struct rnd_state prng;
unsigned long count;
};
static struct i915_gem_context *smoke_context(struct preempt_smoke *smoke)
{
return smoke->contexts[i915_prandom_u32_max_state(smoke->ncontext,
&smoke->prng)];
}
static int smoke_submit(struct preempt_smoke *smoke,
struct i915_gem_context *ctx, int prio,
struct drm_i915_gem_object *batch)
{
struct i915_request *rq;
struct i915_vma *vma = NULL;
int err = 0;
if (batch) {
vma = i915_vma_instance(batch, &ctx->ppgtt->vm, NULL);
if (IS_ERR(vma))
return PTR_ERR(vma);
err = i915_vma_pin(vma, 0, 0, PIN_USER);
if (err)
return err;
}
ctx->sched.priority = prio;
rq = i915_request_alloc(smoke->engine, ctx);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
goto unpin;
}
if (vma) {
err = rq->engine->emit_bb_start(rq,
vma->node.start,
PAGE_SIZE, 0);
if (!err)
err = i915_vma_move_to_active(vma, rq, 0);
}
i915_request_add(rq);
unpin:
if (vma)
i915_vma_unpin(vma);
return err;
}
static int smoke_crescendo_thread(void *arg)
{
struct preempt_smoke *smoke = arg;
IGT_TIMEOUT(end_time);
unsigned long count;
count = 0;
do {
struct i915_gem_context *ctx = smoke_context(smoke);
int err;
mutex_lock(&smoke->i915->drm.struct_mutex);
err = smoke_submit(smoke,
ctx, count % I915_PRIORITY_MAX,
smoke->batch);
mutex_unlock(&smoke->i915->drm.struct_mutex);
if (err)
return err;
count++;
} while (!__igt_timeout(end_time, NULL));
smoke->count = count;
return 0;
}
static int smoke_crescendo(struct preempt_smoke *smoke, unsigned int flags)
#define BATCH BIT(0)
{
struct task_struct *tsk[I915_NUM_ENGINES] = {};
struct preempt_smoke arg[I915_NUM_ENGINES];
struct intel_engine_cs *engine;
enum intel_engine_id id;
unsigned long count;
int err = 0;
mutex_unlock(&smoke->i915->drm.struct_mutex);
for_each_engine(engine, smoke->i915, id) {
arg[id] = *smoke;
arg[id].engine = engine;
if (!(flags & BATCH))
arg[id].batch = NULL;
arg[id].count = 0;
tsk[id] = kthread_run(smoke_crescendo_thread, &arg,
"igt/smoke:%d", id);
if (IS_ERR(tsk[id])) {
err = PTR_ERR(tsk[id]);
break;
}
get_task_struct(tsk[id]);
}
count = 0;
for_each_engine(engine, smoke->i915, id) {
int status;
if (IS_ERR_OR_NULL(tsk[id]))
continue;
status = kthread_stop(tsk[id]);
if (status && !err)
err = status;
count += arg[id].count;
put_task_struct(tsk[id]);
}
mutex_lock(&smoke->i915->drm.struct_mutex);
pr_info("Submitted %lu crescendo:%x requests across %d engines and %d contexts\n",
count, flags,
INTEL_INFO(smoke->i915)->num_rings, smoke->ncontext);
return 0;
}
static int smoke_random(struct preempt_smoke *smoke, unsigned int flags)
{
enum intel_engine_id id;
IGT_TIMEOUT(end_time);
unsigned long count;
count = 0;
do {
for_each_engine(smoke->engine, smoke->i915, id) {
struct i915_gem_context *ctx = smoke_context(smoke);
int err;
err = smoke_submit(smoke,
ctx, random_priority(&smoke->prng),
flags & BATCH ? smoke->batch : NULL);
if (err)
return err;
count++;
}
} while (!__igt_timeout(end_time, NULL));
pr_info("Submitted %lu random:%x requests across %d engines and %d contexts\n",
count, flags,
INTEL_INFO(smoke->i915)->num_rings, smoke->ncontext);
return 0;
}
static int live_preempt_smoke(void *arg)
{
struct preempt_smoke smoke = {
.i915 = arg,
.prng = I915_RND_STATE_INITIALIZER(i915_selftest.random_seed),
.ncontext = 1024,
};
const unsigned int phase[] = { 0, BATCH };
int err = -ENOMEM;
u32 *cs;
int n;
if (!HAS_LOGICAL_RING_PREEMPTION(smoke.i915))
return 0;
smoke.contexts = kmalloc_array(smoke.ncontext,
sizeof(*smoke.contexts),
GFP_KERNEL);
if (!smoke.contexts)
return -ENOMEM;
mutex_lock(&smoke.i915->drm.struct_mutex);
intel_runtime_pm_get(smoke.i915);
smoke.batch = i915_gem_object_create_internal(smoke.i915, PAGE_SIZE);
if (IS_ERR(smoke.batch)) {
err = PTR_ERR(smoke.batch);
goto err_unlock;
}
cs = i915_gem_object_pin_map(smoke.batch, I915_MAP_WB);
if (IS_ERR(cs)) {
err = PTR_ERR(cs);
goto err_batch;
}
for (n = 0; n < PAGE_SIZE / sizeof(*cs) - 1; n++)
cs[n] = MI_ARB_CHECK;
cs[n] = MI_BATCH_BUFFER_END;
i915_gem_object_unpin_map(smoke.batch);
err = i915_gem_object_set_to_gtt_domain(smoke.batch, false);
if (err)
goto err_batch;
for (n = 0; n < smoke.ncontext; n++) {
smoke.contexts[n] = kernel_context(smoke.i915);
if (!smoke.contexts[n])
goto err_ctx;
}
for (n = 0; n < ARRAY_SIZE(phase); n++) {
err = smoke_crescendo(&smoke, phase[n]);
if (err)
goto err_ctx;
err = smoke_random(&smoke, phase[n]);
if (err)
goto err_ctx;
}
err_ctx:
if (igt_flush_test(smoke.i915, I915_WAIT_LOCKED))
err = -EIO;
for (n = 0; n < smoke.ncontext; n++) {
if (!smoke.contexts[n])
break;
kernel_context_close(smoke.contexts[n]);
}
err_batch:
i915_gem_object_put(smoke.batch);
err_unlock:
intel_runtime_pm_put(smoke.i915);
mutex_unlock(&smoke.i915->drm.struct_mutex);
kfree(smoke.contexts);
return err;
}
int intel_execlists_live_selftests(struct drm_i915_private *i915)
{
static const struct i915_subtest tests[] = {
SUBTEST(live_sanitycheck),
SUBTEST(live_preempt),
SUBTEST(live_late_preempt),
SUBTEST(live_preempt_hang),
SUBTEST(live_preempt_smoke),
};
if (!HAS_EXECLISTS(i915))
return 0;
if (i915_terminally_wedged(&i915->gpu_error))
return 0;
return i915_subtests(tests, i915);
}