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linux/drivers/gpu/drm/i915/selftests/intel_hangcheck.c

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/*
* Copyright © 2016 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.
*
*/
#include <linux/kthread.h>
#include "../i915_selftest.h"
#include "i915_random.h"
#include "igt_flush_test.h"
#include "igt_wedge_me.h"
#include "mock_context.h"
#include "mock_drm.h"
#define IGT_IDLE_TIMEOUT 50 /* ms; time to wait after flushing between tests */
struct hang {
struct drm_i915_private *i915;
struct drm_i915_gem_object *hws;
struct drm_i915_gem_object *obj;
struct i915_gem_context *ctx;
u32 *seqno;
u32 *batch;
};
static int hang_init(struct hang *h, struct drm_i915_private *i915)
{
void *vaddr;
int err;
memset(h, 0, sizeof(*h));
h->i915 = i915;
h->ctx = kernel_context(i915);
if (IS_ERR(h->ctx))
return PTR_ERR(h->ctx);
h->hws = i915_gem_object_create_internal(i915, PAGE_SIZE);
if (IS_ERR(h->hws)) {
err = PTR_ERR(h->hws);
goto err_ctx;
}
h->obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
if (IS_ERR(h->obj)) {
err = PTR_ERR(h->obj);
goto err_hws;
}
i915_gem_object_set_cache_level(h->hws, I915_CACHE_LLC);
vaddr = i915_gem_object_pin_map(h->hws, I915_MAP_WB);
if (IS_ERR(vaddr)) {
err = PTR_ERR(vaddr);
goto err_obj;
}
h->seqno = memset(vaddr, 0xff, PAGE_SIZE);
vaddr = i915_gem_object_pin_map(h->obj,
i915_coherent_map_type(i915));
if (IS_ERR(vaddr)) {
err = PTR_ERR(vaddr);
goto err_unpin_hws;
}
h->batch = vaddr;
return 0;
err_unpin_hws:
i915_gem_object_unpin_map(h->hws);
err_obj:
i915_gem_object_put(h->obj);
err_hws:
i915_gem_object_put(h->hws);
err_ctx:
kernel_context_close(h->ctx);
return err;
}
static u64 hws_address(const struct i915_vma *hws,
const struct i915_request *rq)
{
return hws->node.start + offset_in_page(sizeof(u32)*rq->fence.context);
}
static int emit_recurse_batch(struct hang *h,
struct i915_request *rq)
{
struct drm_i915_private *i915 = h->i915;
struct i915_address_space *vm =
rq->gem_context->ppgtt ?
&rq->gem_context->ppgtt->vm :
&i915->ggtt.vm;
struct i915_vma *hws, *vma;
unsigned int flags;
u32 *batch;
int err;
vma = i915_vma_instance(h->obj, vm, NULL);
if (IS_ERR(vma))
return PTR_ERR(vma);
hws = i915_vma_instance(h->hws, vm, NULL);
if (IS_ERR(hws))
return PTR_ERR(hws);
err = i915_vma_pin(vma, 0, 0, PIN_USER);
if (err)
return err;
err = i915_vma_pin(hws, 0, 0, PIN_USER);
if (err)
goto unpin_vma;
err = i915_vma_move_to_active(vma, rq, 0);
if (err)
goto unpin_hws;
if (!i915_gem_object_has_active_reference(vma->obj)) {
i915_gem_object_get(vma->obj);
i915_gem_object_set_active_reference(vma->obj);
}
err = i915_vma_move_to_active(hws, rq, 0);
if (err)
goto unpin_hws;
if (!i915_gem_object_has_active_reference(hws->obj)) {
i915_gem_object_get(hws->obj);
i915_gem_object_set_active_reference(hws->obj);
}
batch = h->batch;
if (INTEL_GEN(i915) >= 8) {
*batch++ = MI_STORE_DWORD_IMM_GEN4;
*batch++ = lower_32_bits(hws_address(hws, rq));
*batch++ = upper_32_bits(hws_address(hws, rq));
*batch++ = rq->fence.seqno;
*batch++ = MI_ARB_CHECK;
memset(batch, 0, 1024);
batch += 1024 / sizeof(*batch);
*batch++ = MI_ARB_CHECK;
*batch++ = MI_BATCH_BUFFER_START | 1 << 8 | 1;
*batch++ = lower_32_bits(vma->node.start);
*batch++ = upper_32_bits(vma->node.start);
} else if (INTEL_GEN(i915) >= 6) {
*batch++ = MI_STORE_DWORD_IMM_GEN4;
*batch++ = 0;
*batch++ = lower_32_bits(hws_address(hws, rq));
*batch++ = rq->fence.seqno;
*batch++ = MI_ARB_CHECK;
memset(batch, 0, 1024);
batch += 1024 / sizeof(*batch);
*batch++ = MI_ARB_CHECK;
*batch++ = MI_BATCH_BUFFER_START | 1 << 8;
*batch++ = lower_32_bits(vma->node.start);
} else if (INTEL_GEN(i915) >= 4) {
*batch++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT;
*batch++ = 0;
*batch++ = lower_32_bits(hws_address(hws, rq));
*batch++ = rq->fence.seqno;
*batch++ = MI_ARB_CHECK;
memset(batch, 0, 1024);
batch += 1024 / sizeof(*batch);
*batch++ = MI_ARB_CHECK;
*batch++ = MI_BATCH_BUFFER_START | 2 << 6;
*batch++ = lower_32_bits(vma->node.start);
} else {
*batch++ = MI_STORE_DWORD_IMM | MI_MEM_VIRTUAL;
*batch++ = lower_32_bits(hws_address(hws, rq));
*batch++ = rq->fence.seqno;
*batch++ = MI_ARB_CHECK;
memset(batch, 0, 1024);
batch += 1024 / sizeof(*batch);
*batch++ = MI_ARB_CHECK;
*batch++ = MI_BATCH_BUFFER_START | 2 << 6;
*batch++ = lower_32_bits(vma->node.start);
}
*batch++ = MI_BATCH_BUFFER_END; /* not reached */
i915_gem_chipset_flush(h->i915);
flags = 0;
if (INTEL_GEN(vm->i915) <= 5)
flags |= I915_DISPATCH_SECURE;
err = rq->engine->emit_bb_start(rq, vma->node.start, PAGE_SIZE, flags);
unpin_hws:
i915_vma_unpin(hws);
unpin_vma:
i915_vma_unpin(vma);
return err;
}
static struct i915_request *
hang_create_request(struct hang *h, struct intel_engine_cs *engine)
{
struct i915_request *rq;
int err;
if (i915_gem_object_is_active(h->obj)) {
struct drm_i915_gem_object *obj;
void *vaddr;
obj = i915_gem_object_create_internal(h->i915, PAGE_SIZE);
if (IS_ERR(obj))
return ERR_CAST(obj);
vaddr = i915_gem_object_pin_map(obj,
i915_coherent_map_type(h->i915));
if (IS_ERR(vaddr)) {
i915_gem_object_put(obj);
return ERR_CAST(vaddr);
}
i915_gem_object_unpin_map(h->obj);
i915_gem_object_put(h->obj);
h->obj = obj;
h->batch = vaddr;
}
rq = i915_request_alloc(engine, h->ctx);
if (IS_ERR(rq))
return rq;
err = emit_recurse_batch(h, rq);
if (err) {
i915_request_add(rq);
return ERR_PTR(err);
}
return rq;
}
static u32 hws_seqno(const struct hang *h, const struct i915_request *rq)
{
return READ_ONCE(h->seqno[rq->fence.context % (PAGE_SIZE/sizeof(u32))]);
}
static void hang_fini(struct hang *h)
{
*h->batch = MI_BATCH_BUFFER_END;
i915_gem_chipset_flush(h->i915);
i915_gem_object_unpin_map(h->obj);
i915_gem_object_put(h->obj);
i915_gem_object_unpin_map(h->hws);
i915_gem_object_put(h->hws);
kernel_context_close(h->ctx);
igt_flush_test(h->i915, I915_WAIT_LOCKED);
}
static bool wait_until_running(struct hang *h, struct i915_request *rq)
{
return !(wait_for_us(i915_seqno_passed(hws_seqno(h, rq),
rq->fence.seqno),
10) &&
wait_for(i915_seqno_passed(hws_seqno(h, rq),
rq->fence.seqno),
1000));
}
static int igt_hang_sanitycheck(void *arg)
{
struct drm_i915_private *i915 = arg;
struct i915_request *rq;
struct intel_engine_cs *engine;
enum intel_engine_id id;
struct hang h;
int err;
/* Basic check that we can execute our hanging batch */
mutex_lock(&i915->drm.struct_mutex);
err = hang_init(&h, i915);
if (err)
goto unlock;
for_each_engine(engine, i915, id) {
long timeout;
if (!intel_engine_can_store_dword(engine))
continue;
rq = hang_create_request(&h, engine);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
pr_err("Failed to create request for %s, err=%d\n",
engine->name, err);
goto fini;
}
i915_request_get(rq);
*h.batch = MI_BATCH_BUFFER_END;
i915_gem_chipset_flush(i915);
i915_request_add(rq);
timeout = i915_request_wait(rq,
I915_WAIT_LOCKED,
MAX_SCHEDULE_TIMEOUT);
i915_request_put(rq);
if (timeout < 0) {
err = timeout;
pr_err("Wait for request failed on %s, err=%d\n",
engine->name, err);
goto fini;
}
}
fini:
hang_fini(&h);
unlock:
mutex_unlock(&i915->drm.struct_mutex);
return err;
}
static void global_reset_lock(struct drm_i915_private *i915)
{
struct intel_engine_cs *engine;
enum intel_engine_id id;
pr_debug("%s: current gpu_error=%08lx\n",
__func__, i915->gpu_error.flags);
while (test_and_set_bit(I915_RESET_BACKOFF, &i915->gpu_error.flags))
wait_event(i915->gpu_error.reset_queue,
!test_bit(I915_RESET_BACKOFF,
&i915->gpu_error.flags));
for_each_engine(engine, i915, id) {
while (test_and_set_bit(I915_RESET_ENGINE + id,
&i915->gpu_error.flags))
wait_on_bit(&i915->gpu_error.flags,
I915_RESET_ENGINE + id,
TASK_UNINTERRUPTIBLE);
}
}
static void global_reset_unlock(struct drm_i915_private *i915)
{
struct intel_engine_cs *engine;
enum intel_engine_id id;
for_each_engine(engine, i915, id)
clear_bit(I915_RESET_ENGINE + id, &i915->gpu_error.flags);
clear_bit(I915_RESET_BACKOFF, &i915->gpu_error.flags);
wake_up_all(&i915->gpu_error.reset_queue);
}
static int igt_global_reset(void *arg)
{
struct drm_i915_private *i915 = arg;
unsigned int reset_count;
int err = 0;
/* Check that we can issue a global GPU reset */
global_reset_lock(i915);
set_bit(I915_RESET_HANDOFF, &i915->gpu_error.flags);
mutex_lock(&i915->drm.struct_mutex);
reset_count = i915_reset_count(&i915->gpu_error);
i915_reset(i915, ALL_ENGINES, NULL);
if (i915_reset_count(&i915->gpu_error) == reset_count) {
pr_err("No GPU reset recorded!\n");
err = -EINVAL;
}
mutex_unlock(&i915->drm.struct_mutex);
GEM_BUG_ON(test_bit(I915_RESET_HANDOFF, &i915->gpu_error.flags));
global_reset_unlock(i915);
if (i915_terminally_wedged(&i915->gpu_error))
err = -EIO;
return err;
}
static bool wait_for_idle(struct intel_engine_cs *engine)
{
return wait_for(intel_engine_is_idle(engine), IGT_IDLE_TIMEOUT) == 0;
}
static int __igt_reset_engine(struct drm_i915_private *i915, bool active)
{
struct intel_engine_cs *engine;
enum intel_engine_id id;
struct hang h;
int err = 0;
/* Check that we can issue an engine reset on an idle engine (no-op) */
if (!intel_has_reset_engine(i915))
return 0;
if (active) {
mutex_lock(&i915->drm.struct_mutex);
err = hang_init(&h, i915);
mutex_unlock(&i915->drm.struct_mutex);
if (err)
return err;
}
for_each_engine(engine, i915, id) {
unsigned int reset_count, reset_engine_count;
IGT_TIMEOUT(end_time);
if (active && !intel_engine_can_store_dword(engine))
continue;
if (!wait_for_idle(engine)) {
pr_err("%s failed to idle before reset\n",
engine->name);
err = -EIO;
break;
}
reset_count = i915_reset_count(&i915->gpu_error);
reset_engine_count = i915_reset_engine_count(&i915->gpu_error,
engine);
set_bit(I915_RESET_ENGINE + id, &i915->gpu_error.flags);
do {
u32 seqno = intel_engine_get_seqno(engine);
if (active) {
struct i915_request *rq;
mutex_lock(&i915->drm.struct_mutex);
rq = hang_create_request(&h, engine);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
mutex_unlock(&i915->drm.struct_mutex);
break;
}
i915_request_get(rq);
i915_request_add(rq);
mutex_unlock(&i915->drm.struct_mutex);
if (!wait_until_running(&h, rq)) {
struct drm_printer p = drm_info_printer(i915->drm.dev);
pr_err("%s: Failed to start request %x, at %x\n",
__func__, rq->fence.seqno, hws_seqno(&h, rq));
intel_engine_dump(engine, &p,
"%s\n", engine->name);
i915_request_put(rq);
err = -EIO;
break;
}
GEM_BUG_ON(!rq->global_seqno);
seqno = rq->global_seqno - 1;
i915_request_put(rq);
}
err = i915_reset_engine(engine, NULL);
if (err) {
pr_err("i915_reset_engine failed\n");
break;
}
if (i915_reset_count(&i915->gpu_error) != reset_count) {
pr_err("Full GPU reset recorded! (engine reset expected)\n");
err = -EINVAL;
break;
}
reset_engine_count += active;
if (i915_reset_engine_count(&i915->gpu_error, engine) !=
reset_engine_count) {
pr_err("%s engine reset %srecorded!\n",
engine->name, active ? "not " : "");
err = -EINVAL;
break;
}
if (!wait_for_idle(engine)) {
struct drm_printer p =
drm_info_printer(i915->drm.dev);
pr_err("%s failed to idle after reset\n",
engine->name);
intel_engine_dump(engine, &p,
"%s\n", engine->name);
err = -EIO;
break;
}
} while (time_before(jiffies, end_time));
clear_bit(I915_RESET_ENGINE + id, &i915->gpu_error.flags);
if (err)
break;
err = igt_flush_test(i915, 0);
if (err)
break;
}
if (i915_terminally_wedged(&i915->gpu_error))
err = -EIO;
if (active) {
mutex_lock(&i915->drm.struct_mutex);
hang_fini(&h);
mutex_unlock(&i915->drm.struct_mutex);
}
return err;
}
static int igt_reset_idle_engine(void *arg)
{
return __igt_reset_engine(arg, false);
}
static int igt_reset_active_engine(void *arg)
{
return __igt_reset_engine(arg, true);
}
struct active_engine {
struct task_struct *task;
struct intel_engine_cs *engine;
unsigned long resets;
unsigned int flags;
};
#define TEST_ACTIVE BIT(0)
#define TEST_OTHERS BIT(1)
#define TEST_SELF BIT(2)
#define TEST_PRIORITY BIT(3)
static int active_request_put(struct i915_request *rq)
{
int err = 0;
if (!rq)
return 0;
if (i915_request_wait(rq, 0, 5 * HZ) < 0) {
GEM_TRACE("%s timed out waiting for completion of fence %llx:%d, seqno %d.\n",
rq->engine->name,
rq->fence.context,
rq->fence.seqno,
i915_request_global_seqno(rq));
GEM_TRACE_DUMP();
i915_gem_set_wedged(rq->i915);
err = -EIO;
}
i915_request_put(rq);
return err;
}
static int active_engine(void *data)
{
I915_RND_STATE(prng);
struct active_engine *arg = data;
struct intel_engine_cs *engine = arg->engine;
struct i915_request *rq[8] = {};
struct i915_gem_context *ctx[ARRAY_SIZE(rq)];
struct drm_file *file;
unsigned long count = 0;
int err = 0;
file = mock_file(engine->i915);
if (IS_ERR(file))
return PTR_ERR(file);
for (count = 0; count < ARRAY_SIZE(ctx); count++) {
mutex_lock(&engine->i915->drm.struct_mutex);
ctx[count] = live_context(engine->i915, file);
mutex_unlock(&engine->i915->drm.struct_mutex);
if (IS_ERR(ctx[count])) {
err = PTR_ERR(ctx[count]);
while (--count)
i915_gem_context_put(ctx[count]);
goto err_file;
}
}
while (!kthread_should_stop()) {
unsigned int idx = count++ & (ARRAY_SIZE(rq) - 1);
struct i915_request *old = rq[idx];
struct i915_request *new;
mutex_lock(&engine->i915->drm.struct_mutex);
new = i915_request_alloc(engine, ctx[idx]);
if (IS_ERR(new)) {
mutex_unlock(&engine->i915->drm.struct_mutex);
err = PTR_ERR(new);
break;
}
if (arg->flags & TEST_PRIORITY)
ctx[idx]->sched.priority =
i915_prandom_u32_max_state(512, &prng);
rq[idx] = i915_request_get(new);
i915_request_add(new);
mutex_unlock(&engine->i915->drm.struct_mutex);
err = active_request_put(old);
if (err)
break;
cond_resched();
}
for (count = 0; count < ARRAY_SIZE(rq); count++) {
int err__ = active_request_put(rq[count]);
/* Keep the first error */
if (!err)
err = err__;
}
err_file:
mock_file_free(engine->i915, file);
return err;
}
static int __igt_reset_engines(struct drm_i915_private *i915,
const char *test_name,
unsigned int flags)
{
struct intel_engine_cs *engine, *other;
enum intel_engine_id id, tmp;
struct hang h;
int err = 0;
/* Check that issuing a reset on one engine does not interfere
* with any other engine.
*/
if (!intel_has_reset_engine(i915))
return 0;
if (flags & TEST_ACTIVE) {
mutex_lock(&i915->drm.struct_mutex);
err = hang_init(&h, i915);
mutex_unlock(&i915->drm.struct_mutex);
if (err)
return err;
if (flags & TEST_PRIORITY)
h.ctx->sched.priority = 1024;
}
for_each_engine(engine, i915, id) {
struct active_engine threads[I915_NUM_ENGINES] = {};
unsigned long global = i915_reset_count(&i915->gpu_error);
unsigned long count = 0, reported;
IGT_TIMEOUT(end_time);
if (flags & TEST_ACTIVE &&
!intel_engine_can_store_dword(engine))
continue;
if (!wait_for_idle(engine)) {
pr_err("i915_reset_engine(%s:%s): failed to idle before reset\n",
engine->name, test_name);
err = -EIO;
break;
}
memset(threads, 0, sizeof(threads));
for_each_engine(other, i915, tmp) {
struct task_struct *tsk;
threads[tmp].resets =
i915_reset_engine_count(&i915->gpu_error,
other);
if (!(flags & TEST_OTHERS))
continue;
if (other == engine && !(flags & TEST_SELF))
continue;
threads[tmp].engine = other;
threads[tmp].flags = flags;
tsk = kthread_run(active_engine, &threads[tmp],
"igt/%s", other->name);
if (IS_ERR(tsk)) {
err = PTR_ERR(tsk);
goto unwind;
}
threads[tmp].task = tsk;
get_task_struct(tsk);
}
set_bit(I915_RESET_ENGINE + id, &i915->gpu_error.flags);
do {
u32 seqno = intel_engine_get_seqno(engine);
struct i915_request *rq = NULL;
if (flags & TEST_ACTIVE) {
mutex_lock(&i915->drm.struct_mutex);
rq = hang_create_request(&h, engine);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
mutex_unlock(&i915->drm.struct_mutex);
break;
}
i915_request_get(rq);
i915_request_add(rq);
mutex_unlock(&i915->drm.struct_mutex);
if (!wait_until_running(&h, rq)) {
struct drm_printer p = drm_info_printer(i915->drm.dev);
pr_err("%s: Failed to start request %x, at %x\n",
__func__, rq->fence.seqno, hws_seqno(&h, rq));
intel_engine_dump(engine, &p,
"%s\n", engine->name);
i915_request_put(rq);
err = -EIO;
break;
}
GEM_BUG_ON(!rq->global_seqno);
seqno = rq->global_seqno - 1;
}
err = i915_reset_engine(engine, NULL);
if (err) {
pr_err("i915_reset_engine(%s:%s): failed, err=%d\n",
engine->name, test_name, err);
break;
}
count++;
if (rq) {
i915_request_wait(rq, 0, MAX_SCHEDULE_TIMEOUT);
i915_request_put(rq);
}
if (!(flags & TEST_SELF) && !wait_for_idle(engine)) {
struct drm_printer p =
drm_info_printer(i915->drm.dev);
pr_err("i915_reset_engine(%s:%s):"
" failed to idle after reset\n",
engine->name, test_name);
intel_engine_dump(engine, &p,
"%s\n", engine->name);
err = -EIO;
break;
}
} while (time_before(jiffies, end_time));
clear_bit(I915_RESET_ENGINE + id, &i915->gpu_error.flags);
pr_info("i915_reset_engine(%s:%s): %lu resets\n",
engine->name, test_name, count);
reported = i915_reset_engine_count(&i915->gpu_error, engine);
reported -= threads[engine->id].resets;
if (reported != (flags & TEST_ACTIVE ? count : 0)) {
pr_err("i915_reset_engine(%s:%s): reset %lu times, but reported %lu, expected %lu reported\n",
engine->name, test_name, count, reported,
(flags & TEST_ACTIVE ? count : 0));
if (!err)
err = -EINVAL;
}
unwind:
for_each_engine(other, i915, tmp) {
int ret;
if (!threads[tmp].task)
continue;
ret = kthread_stop(threads[tmp].task);
if (ret) {
pr_err("kthread for other engine %s failed, err=%d\n",
other->name, ret);
if (!err)
err = ret;
}
put_task_struct(threads[tmp].task);
if (other != engine &&
threads[tmp].resets !=
i915_reset_engine_count(&i915->gpu_error, other)) {
pr_err("Innocent engine %s was reset (count=%ld)\n",
other->name,
i915_reset_engine_count(&i915->gpu_error,
other) -
threads[tmp].resets);
if (!err)
err = -EINVAL;
}
}
if (global != i915_reset_count(&i915->gpu_error)) {
pr_err("Global reset (count=%ld)!\n",
i915_reset_count(&i915->gpu_error) - global);
if (!err)
err = -EINVAL;
}
if (err)
break;
err = igt_flush_test(i915, 0);
if (err)
break;
}
if (i915_terminally_wedged(&i915->gpu_error))
err = -EIO;
if (flags & TEST_ACTIVE) {
mutex_lock(&i915->drm.struct_mutex);
hang_fini(&h);
mutex_unlock(&i915->drm.struct_mutex);
}
return err;
}
static int igt_reset_engines(void *arg)
{
static const struct {
const char *name;
unsigned int flags;
} phases[] = {
{ "idle", 0 },
{ "active", TEST_ACTIVE },
{ "others-idle", TEST_OTHERS },
{ "others-active", TEST_OTHERS | TEST_ACTIVE },
{
"others-priority",
TEST_OTHERS | TEST_ACTIVE | TEST_PRIORITY
},
{
"self-priority",
TEST_OTHERS | TEST_ACTIVE | TEST_PRIORITY | TEST_SELF,
},
{ }
};
struct drm_i915_private *i915 = arg;
typeof(*phases) *p;
int err;
for (p = phases; p->name; p++) {
if (p->flags & TEST_PRIORITY) {
if (!(i915->caps.scheduler & I915_SCHEDULER_CAP_PRIORITY))
continue;
}
err = __igt_reset_engines(arg, p->name, p->flags);
if (err)
return err;
}
return 0;
}
static u32 fake_hangcheck(struct i915_request *rq, u32 mask)
{
struct i915_gpu_error *error = &rq->i915->gpu_error;
u32 reset_count = i915_reset_count(error);
error->stalled_mask = mask;
/* set_bit() must be after we have setup the backchannel (mask) */
smp_mb__before_atomic();
set_bit(I915_RESET_HANDOFF, &error->flags);
wake_up_all(&error->wait_queue);
return reset_count;
}
static int igt_reset_wait(void *arg)
{
struct drm_i915_private *i915 = arg;
struct i915_request *rq;
unsigned int reset_count;
struct hang h;
long timeout;
int err;
if (!intel_engine_can_store_dword(i915->engine[RCS]))
return 0;
/* Check that we detect a stuck waiter and issue a reset */
global_reset_lock(i915);
mutex_lock(&i915->drm.struct_mutex);
err = hang_init(&h, i915);
if (err)
goto unlock;
rq = hang_create_request(&h, i915->engine[RCS]);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
goto fini;
}
i915_request_get(rq);
i915_request_add(rq);
if (!wait_until_running(&h, rq)) {
struct drm_printer p = drm_info_printer(i915->drm.dev);
pr_err("%s: Failed to start request %x, at %x\n",
__func__, rq->fence.seqno, hws_seqno(&h, rq));
intel_engine_dump(rq->engine, &p, "%s\n", rq->engine->name);
i915_gem_set_wedged(i915);
err = -EIO;
goto out_rq;
}
reset_count = fake_hangcheck(rq, ALL_ENGINES);
timeout = i915_request_wait(rq, I915_WAIT_LOCKED, 10);
if (timeout < 0) {
pr_err("i915_request_wait failed on a stuck request: err=%ld\n",
timeout);
err = timeout;
goto out_rq;
}
GEM_BUG_ON(test_bit(I915_RESET_HANDOFF, &i915->gpu_error.flags));
if (i915_reset_count(&i915->gpu_error) == reset_count) {
pr_err("No GPU reset recorded!\n");
err = -EINVAL;
goto out_rq;
}
out_rq:
i915_request_put(rq);
fini:
hang_fini(&h);
unlock:
mutex_unlock(&i915->drm.struct_mutex);
global_reset_unlock(i915);
if (i915_terminally_wedged(&i915->gpu_error))
return -EIO;
return err;
}
struct evict_vma {
struct completion completion;
struct i915_vma *vma;
};
static int evict_vma(void *data)
{
struct evict_vma *arg = data;
struct i915_address_space *vm = arg->vma->vm;
struct drm_i915_private *i915 = vm->i915;
struct drm_mm_node evict = arg->vma->node;
int err;
complete(&arg->completion);
mutex_lock(&i915->drm.struct_mutex);
err = i915_gem_evict_for_node(vm, &evict, 0);
mutex_unlock(&i915->drm.struct_mutex);
return err;
}
static int evict_fence(void *data)
{
struct evict_vma *arg = data;
struct drm_i915_private *i915 = arg->vma->vm->i915;
int err;
complete(&arg->completion);
mutex_lock(&i915->drm.struct_mutex);
/* Mark the fence register as dirty to force the mmio update. */
err = i915_gem_object_set_tiling(arg->vma->obj, I915_TILING_Y, 512);
if (err) {
pr_err("Invalid Y-tiling settings; err:%d\n", err);
goto out_unlock;
}
err = i915_vma_pin_fence(arg->vma);
if (err) {
pr_err("Unable to pin Y-tiled fence; err:%d\n", err);
goto out_unlock;
}
i915_vma_unpin_fence(arg->vma);
out_unlock:
mutex_unlock(&i915->drm.struct_mutex);
return err;
}
static int __igt_reset_evict_vma(struct drm_i915_private *i915,
struct i915_address_space *vm,
int (*fn)(void *),
unsigned int flags)
{
struct drm_i915_gem_object *obj;
struct task_struct *tsk = NULL;
struct i915_request *rq;
struct evict_vma arg;
struct hang h;
int err;
if (!intel_engine_can_store_dword(i915->engine[RCS]))
return 0;
/* Check that we can recover an unbind stuck on a hanging request */
global_reset_lock(i915);
mutex_lock(&i915->drm.struct_mutex);
err = hang_init(&h, i915);
if (err)
goto unlock;
obj = i915_gem_object_create_internal(i915, SZ_1M);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
goto fini;
}
if (flags & EXEC_OBJECT_NEEDS_FENCE) {
err = i915_gem_object_set_tiling(obj, I915_TILING_X, 512);
if (err) {
pr_err("Invalid X-tiling settings; err:%d\n", err);
goto out_obj;
}
}
arg.vma = i915_vma_instance(obj, vm, NULL);
if (IS_ERR(arg.vma)) {
err = PTR_ERR(arg.vma);
goto out_obj;
}
rq = hang_create_request(&h, i915->engine[RCS]);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
goto out_obj;
}
err = i915_vma_pin(arg.vma, 0, 0,
i915_vma_is_ggtt(arg.vma) ?
PIN_GLOBAL | PIN_MAPPABLE :
PIN_USER);
if (err) {
i915_request_add(rq);
goto out_obj;
}
if (flags & EXEC_OBJECT_NEEDS_FENCE) {
err = i915_vma_pin_fence(arg.vma);
if (err) {
pr_err("Unable to pin X-tiled fence; err:%d\n", err);
i915_vma_unpin(arg.vma);
i915_request_add(rq);
goto out_obj;
}
}
err = i915_vma_move_to_active(arg.vma, rq, flags);
if (flags & EXEC_OBJECT_NEEDS_FENCE)
i915_vma_unpin_fence(arg.vma);
i915_vma_unpin(arg.vma);
i915_request_get(rq);
i915_request_add(rq);
if (err)
goto out_rq;
mutex_unlock(&i915->drm.struct_mutex);
if (!wait_until_running(&h, rq)) {
struct drm_printer p = drm_info_printer(i915->drm.dev);
pr_err("%s: Failed to start request %x, at %x\n",
__func__, rq->fence.seqno, hws_seqno(&h, rq));
intel_engine_dump(rq->engine, &p, "%s\n", rq->engine->name);
i915_gem_set_wedged(i915);
goto out_reset;
}
init_completion(&arg.completion);
tsk = kthread_run(fn, &arg, "igt/evict_vma");
if (IS_ERR(tsk)) {
err = PTR_ERR(tsk);
tsk = NULL;
goto out_reset;
}
get_task_struct(tsk);
wait_for_completion(&arg.completion);
if (wait_for(waitqueue_active(&rq->execute), 10)) {
struct drm_printer p = drm_info_printer(i915->drm.dev);
pr_err("igt/evict_vma kthread did not wait\n");
intel_engine_dump(rq->engine, &p, "%s\n", rq->engine->name);
i915_gem_set_wedged(i915);
goto out_reset;
}
out_reset:
fake_hangcheck(rq, intel_engine_flag(rq->engine));
if (tsk) {
struct igt_wedge_me w;
/* The reset, even indirectly, should take less than 10ms. */
igt_wedge_on_timeout(&w, i915, HZ / 10 /* 100ms timeout*/)
err = kthread_stop(tsk);
put_task_struct(tsk);
}
mutex_lock(&i915->drm.struct_mutex);
out_rq:
i915_request_put(rq);
out_obj:
i915_gem_object_put(obj);
fini:
hang_fini(&h);
unlock:
mutex_unlock(&i915->drm.struct_mutex);
global_reset_unlock(i915);
if (i915_terminally_wedged(&i915->gpu_error))
return -EIO;
return err;
}
static int igt_reset_evict_ggtt(void *arg)
{
struct drm_i915_private *i915 = arg;
return __igt_reset_evict_vma(i915, &i915->ggtt.vm,
evict_vma, EXEC_OBJECT_WRITE);
}
static int igt_reset_evict_ppgtt(void *arg)
{
struct drm_i915_private *i915 = arg;
struct i915_gem_context *ctx;
struct drm_file *file;
int err;
file = mock_file(i915);
if (IS_ERR(file))
return PTR_ERR(file);
mutex_lock(&i915->drm.struct_mutex);
ctx = live_context(i915, file);
mutex_unlock(&i915->drm.struct_mutex);
if (IS_ERR(ctx)) {
err = PTR_ERR(ctx);
goto out;
}
err = 0;
if (ctx->ppgtt) /* aliasing == global gtt locking, covered above */
err = __igt_reset_evict_vma(i915, &ctx->ppgtt->vm,
evict_vma, EXEC_OBJECT_WRITE);
out:
mock_file_free(i915, file);
return err;
}
static int igt_reset_evict_fence(void *arg)
{
struct drm_i915_private *i915 = arg;
return __igt_reset_evict_vma(i915, &i915->ggtt.vm,
evict_fence, EXEC_OBJECT_NEEDS_FENCE);
}
static int wait_for_others(struct drm_i915_private *i915,
struct intel_engine_cs *exclude)
{
struct intel_engine_cs *engine;
enum intel_engine_id id;
for_each_engine(engine, i915, id) {
if (engine == exclude)
continue;
if (!wait_for_idle(engine))
return -EIO;
}
return 0;
}
static int igt_reset_queue(void *arg)
{
struct drm_i915_private *i915 = arg;
struct intel_engine_cs *engine;
enum intel_engine_id id;
struct hang h;
int err;
/* Check that we replay pending requests following a hang */
global_reset_lock(i915);
mutex_lock(&i915->drm.struct_mutex);
err = hang_init(&h, i915);
if (err)
goto unlock;
for_each_engine(engine, i915, id) {
struct i915_request *prev;
IGT_TIMEOUT(end_time);
unsigned int count;
if (!intel_engine_can_store_dword(engine))
continue;
prev = hang_create_request(&h, engine);
if (IS_ERR(prev)) {
err = PTR_ERR(prev);
goto fini;
}
i915_request_get(prev);
i915_request_add(prev);
count = 0;
do {
struct i915_request *rq;
unsigned int reset_count;
rq = hang_create_request(&h, engine);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
goto fini;
}
i915_request_get(rq);
i915_request_add(rq);
/*
* XXX We don't handle resetting the kernel context
* very well. If we trigger a device reset twice in
* quick succession while the kernel context is
* executing, we may end up skipping the breadcrumb.
* This is really only a problem for the selftest as
* normally there is a large interlude between resets
* (hangcheck), or we focus on resetting just one
* engine and so avoid repeatedly resetting innocents.
*/
err = wait_for_others(i915, engine);
if (err) {
pr_err("%s(%s): Failed to idle other inactive engines after device reset\n",
__func__, engine->name);
i915_request_put(rq);
i915_request_put(prev);
GEM_TRACE_DUMP();
i915_gem_set_wedged(i915);
goto fini;
}
if (!wait_until_running(&h, prev)) {
struct drm_printer p = drm_info_printer(i915->drm.dev);
pr_err("%s(%s): Failed to start request %x, at %x\n",
__func__, engine->name,
prev->fence.seqno, hws_seqno(&h, prev));
intel_engine_dump(engine, &p,
"%s\n", engine->name);
i915_request_put(rq);
i915_request_put(prev);
i915_gem_set_wedged(i915);
err = -EIO;
goto fini;
}
reset_count = fake_hangcheck(prev, ENGINE_MASK(id));
i915_reset(i915, ENGINE_MASK(id), NULL);
GEM_BUG_ON(test_bit(I915_RESET_HANDOFF,
&i915->gpu_error.flags));
if (prev->fence.error != -EIO) {
pr_err("GPU reset not recorded on hanging request [fence.error=%d]!\n",
prev->fence.error);
i915_request_put(rq);
i915_request_put(prev);
err = -EINVAL;
goto fini;
}
if (rq->fence.error) {
pr_err("Fence error status not zero [%d] after unrelated reset\n",
rq->fence.error);
i915_request_put(rq);
i915_request_put(prev);
err = -EINVAL;
goto fini;
}
if (i915_reset_count(&i915->gpu_error) == reset_count) {
pr_err("No GPU reset recorded!\n");
i915_request_put(rq);
i915_request_put(prev);
err = -EINVAL;
goto fini;
}
i915_request_put(prev);
prev = rq;
count++;
} while (time_before(jiffies, end_time));
pr_info("%s: Completed %d resets\n", engine->name, count);
*h.batch = MI_BATCH_BUFFER_END;
i915_gem_chipset_flush(i915);
i915_request_put(prev);
err = igt_flush_test(i915, I915_WAIT_LOCKED);
if (err)
break;
}
fini:
hang_fini(&h);
unlock:
mutex_unlock(&i915->drm.struct_mutex);
global_reset_unlock(i915);
if (i915_terminally_wedged(&i915->gpu_error))
return -EIO;
return err;
}
static int igt_handle_error(void *arg)
{
struct drm_i915_private *i915 = arg;
struct intel_engine_cs *engine = i915->engine[RCS];
struct hang h;
struct i915_request *rq;
struct i915_gpu_state *error;
int err;
/* Check that we can issue a global GPU and engine reset */
if (!intel_has_reset_engine(i915))
return 0;
if (!engine || !intel_engine_can_store_dword(engine))
return 0;
mutex_lock(&i915->drm.struct_mutex);
err = hang_init(&h, i915);
if (err)
goto err_unlock;
rq = hang_create_request(&h, engine);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
goto err_fini;
}
i915_request_get(rq);
i915_request_add(rq);
if (!wait_until_running(&h, rq)) {
struct drm_printer p = drm_info_printer(i915->drm.dev);
pr_err("%s: Failed to start request %x, at %x\n",
__func__, rq->fence.seqno, hws_seqno(&h, rq));
intel_engine_dump(rq->engine, &p, "%s\n", rq->engine->name);
i915_gem_set_wedged(i915);
err = -EIO;
goto err_request;
}
mutex_unlock(&i915->drm.struct_mutex);
/* Temporarily disable error capture */
error = xchg(&i915->gpu_error.first_error, (void *)-1);
i915_handle_error(i915, ENGINE_MASK(engine->id), 0, NULL);
xchg(&i915->gpu_error.first_error, error);
mutex_lock(&i915->drm.struct_mutex);
if (rq->fence.error != -EIO) {
pr_err("Guilty request not identified!\n");
err = -EINVAL;
goto err_request;
}
err_request:
i915_request_put(rq);
err_fini:
hang_fini(&h);
err_unlock:
mutex_unlock(&i915->drm.struct_mutex);
return err;
}
int intel_hangcheck_live_selftests(struct drm_i915_private *i915)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_global_reset), /* attempt to recover GPU first */
SUBTEST(igt_hang_sanitycheck),
SUBTEST(igt_reset_idle_engine),
SUBTEST(igt_reset_active_engine),
SUBTEST(igt_reset_engines),
SUBTEST(igt_reset_queue),
SUBTEST(igt_reset_wait),
SUBTEST(igt_reset_evict_ggtt),
SUBTEST(igt_reset_evict_ppgtt),
SUBTEST(igt_reset_evict_fence),
SUBTEST(igt_handle_error),
};
bool saved_hangcheck;
int err;
if (!intel_has_gpu_reset(i915))
return 0;
if (i915_terminally_wedged(&i915->gpu_error))
return -EIO; /* we're long past hope of a successful reset */
intel_runtime_pm_get(i915);
saved_hangcheck = fetch_and_zero(&i915_modparams.enable_hangcheck);
err = i915_subtests(tests, i915);
mutex_lock(&i915->drm.struct_mutex);
igt_flush_test(i915, I915_WAIT_LOCKED);
mutex_unlock(&i915->drm.struct_mutex);
i915_modparams.enable_hangcheck = saved_hangcheck;
intel_runtime_pm_put(i915);
return err;
}
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