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linux-zen-desktop/drivers/gpu/drm/i915/gt/selftest_hangcheck.c

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Initial commit
2023-08-30 17:31:07 +02:00
// SPDX-License-Identifier: MIT
/*
* Copyright © 2016 Intel Corporation
*/
#include <linux/kthread.h>
#include "gem/i915_gem_context.h"
#include "gem/i915_gem_internal.h"
#include "i915_gem_evict.h"
#include "intel_gt.h"
#include "intel_engine_heartbeat.h"
#include "intel_engine_pm.h"
#include "selftest_engine_heartbeat.h"
#include "i915_selftest.h"
#include "selftests/i915_random.h"
#include "selftests/igt_flush_test.h"
#include "selftests/igt_reset.h"
#include "selftests/igt_atomic.h"
#include "selftests/igt_spinner.h"
#include "selftests/intel_scheduler_helpers.h"
#include "selftests/mock_drm.h"
#include "gem/selftests/mock_context.h"
#include "gem/selftests/igt_gem_utils.h"
#define IGT_IDLE_TIMEOUT 50 /* ms; time to wait after flushing between tests */
struct hang {
struct intel_gt *gt;
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 intel_gt *gt)
{
void *vaddr;
int err;
memset(h, 0, sizeof(*h));
h->gt = gt;
h->ctx = kernel_context(gt->i915, NULL);
if (IS_ERR(h->ctx))
return PTR_ERR(h->ctx);
GEM_BUG_ON(i915_gem_context_is_bannable(h->ctx));
h->hws = i915_gem_object_create_internal(gt->i915, PAGE_SIZE);
if (IS_ERR(h->hws)) {
err = PTR_ERR(h->hws);
goto err_ctx;
}
h->obj = i915_gem_object_create_internal(gt->i915, PAGE_SIZE);
if (IS_ERR(h->obj)) {
err = PTR_ERR(h->obj);
goto err_hws;
}
i915_gem_object_set_cache_coherency(h->hws, I915_CACHE_LLC);
vaddr = i915_gem_object_pin_map_unlocked(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_unlocked(h->obj,
i915_coherent_map_type(gt->i915, h->obj, false));
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 i915_vma_offset(hws) +
offset_in_page(sizeof(u32) * rq->fence.context);
}
static struct i915_request *
hang_create_request(struct hang *h, struct intel_engine_cs *engine)
{
struct intel_gt *gt = h->gt;
struct i915_address_space *vm = i915_gem_context_get_eb_vm(h->ctx);
struct drm_i915_gem_object *obj;
struct i915_request *rq = NULL;
struct i915_vma *hws, *vma;
unsigned int flags;
void *vaddr;
u32 *batch;
int err;
obj = i915_gem_object_create_internal(gt->i915, PAGE_SIZE);
if (IS_ERR(obj)) {
i915_vm_put(vm);
return ERR_CAST(obj);
}
vaddr = i915_gem_object_pin_map_unlocked(obj, i915_coherent_map_type(gt->i915, obj, false));
if (IS_ERR(vaddr)) {
i915_gem_object_put(obj);
i915_vm_put(vm);
return ERR_CAST(vaddr);
}
i915_gem_object_unpin_map(h->obj);
i915_gem_object_put(h->obj);
h->obj = obj;
h->batch = vaddr;
vma = i915_vma_instance(h->obj, vm, NULL);
if (IS_ERR(vma)) {
i915_vm_put(vm);
return ERR_CAST(vma);
}
hws = i915_vma_instance(h->hws, vm, NULL);
if (IS_ERR(hws)) {
i915_vm_put(vm);
return ERR_CAST(hws);
}
err = i915_vma_pin(vma, 0, 0, PIN_USER);
if (err) {
i915_vm_put(vm);
return ERR_PTR(err);
}
err = i915_vma_pin(hws, 0, 0, PIN_USER);
if (err)
goto unpin_vma;
rq = igt_request_alloc(h->ctx, engine);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
goto unpin_hws;
}
err = igt_vma_move_to_active_unlocked(vma, rq, 0);
if (err)
goto cancel_rq;
err = igt_vma_move_to_active_unlocked(hws, rq, 0);
if (err)
goto cancel_rq;
batch = h->batch;
if (GRAPHICS_VER(gt->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_NOOP;
memset(batch, 0, 1024);
batch += 1024 / sizeof(*batch);
*batch++ = MI_NOOP;
*batch++ = MI_BATCH_BUFFER_START | 1 << 8 | 1;
*batch++ = lower_32_bits(i915_vma_offset(vma));
*batch++ = upper_32_bits(i915_vma_offset(vma));
} else if (GRAPHICS_VER(gt->i915) >= 6) {
*batch++ = MI_STORE_DWORD_IMM_GEN4;
*batch++ = 0;
*batch++ = lower_32_bits(hws_address(hws, rq));
*batch++ = rq->fence.seqno;
*batch++ = MI_NOOP;
memset(batch, 0, 1024);
batch += 1024 / sizeof(*batch);
*batch++ = MI_NOOP;
*batch++ = MI_BATCH_BUFFER_START | 1 << 8;
*batch++ = lower_32_bits(i915_vma_offset(vma));
} else if (GRAPHICS_VER(gt->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_NOOP;
memset(batch, 0, 1024);
batch += 1024 / sizeof(*batch);
*batch++ = MI_NOOP;
*batch++ = MI_BATCH_BUFFER_START | 2 << 6;
*batch++ = lower_32_bits(i915_vma_offset(vma));
} else {
*batch++ = MI_STORE_DWORD_IMM | MI_MEM_VIRTUAL;
*batch++ = lower_32_bits(hws_address(hws, rq));
*batch++ = rq->fence.seqno;
*batch++ = MI_NOOP;
memset(batch, 0, 1024);
batch += 1024 / sizeof(*batch);
*batch++ = MI_NOOP;
*batch++ = MI_BATCH_BUFFER_START | 2 << 6;
*batch++ = lower_32_bits(i915_vma_offset(vma));
}
*batch++ = MI_BATCH_BUFFER_END; /* not reached */
intel_gt_chipset_flush(engine->gt);
if (rq->engine->emit_init_breadcrumb) {
err = rq->engine->emit_init_breadcrumb(rq);
if (err)
goto cancel_rq;
}
flags = 0;
if (GRAPHICS_VER(gt->i915) <= 5)
flags |= I915_DISPATCH_SECURE;
err = rq->engine->emit_bb_start(rq, i915_vma_offset(vma), PAGE_SIZE, flags);
cancel_rq:
if (err) {
i915_request_set_error_once(rq, err);
i915_request_add(rq);
}
unpin_hws:
i915_vma_unpin(hws);
unpin_vma:
i915_vma_unpin(vma);
i915_vm_put(vm);
return err ? ERR_PTR(err) : 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;
intel_gt_chipset_flush(h->gt);
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->gt->i915);
}
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 intel_gt *gt = 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 */
err = hang_init(&h, gt);
if (err)
return err;
for_each_engine(engine, gt, id) {
struct intel_wedge_me w;
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;
intel_gt_chipset_flush(engine->gt);
i915_request_add(rq);
timeout = 0;
intel_wedge_on_timeout(&w, gt, HZ / 10 /* 100ms */)
timeout = i915_request_wait(rq, 0,
MAX_SCHEDULE_TIMEOUT);
if (intel_gt_is_wedged(gt))
timeout = -EIO;
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);
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_nop(void *arg)
{
struct intel_gt *gt = arg;
struct i915_gpu_error *global = &gt->i915->gpu_error;
struct intel_engine_cs *engine;
unsigned int reset_count, count;
enum intel_engine_id id;
IGT_TIMEOUT(end_time);
int err = 0;
/* Check that we can reset during non-user portions of requests */
reset_count = i915_reset_count(global);
count = 0;
do {
for_each_engine(engine, gt, id) {
struct intel_context *ce;
int i;
ce = intel_context_create(engine);
if (IS_ERR(ce)) {
err = PTR_ERR(ce);
pr_err("[%s] Create context failed: %d!\n", engine->name, err);
break;
}
for (i = 0; i < 16; i++) {
struct i915_request *rq;
rq = intel_context_create_request(ce);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
pr_err("[%s] Create request failed: %d!\n",
engine->name, err);
break;
}
i915_request_add(rq);
}
intel_context_put(ce);
}
igt_global_reset_lock(gt);
intel_gt_reset(gt, ALL_ENGINES, NULL);
igt_global_reset_unlock(gt);
if (intel_gt_is_wedged(gt)) {
pr_err("[%s] GT is wedged!\n", engine->name);
err = -EIO;
break;
}
if (i915_reset_count(global) != reset_count + ++count) {
pr_err("[%s] Reset not recorded: %d vs %d + %d!\n",
engine->name, i915_reset_count(global), reset_count, count);
err = -EINVAL;
break;
}
err = igt_flush_test(gt->i915);
if (err) {
pr_err("[%s] Flush failed: %d!\n", engine->name, err);
break;
}
} while (time_before(jiffies, end_time));
pr_info("%s: %d resets\n", __func__, count);
if (igt_flush_test(gt->i915)) {
pr_err("Post flush failed: %d!\n", err);
err = -EIO;
}
return err;
}
static int igt_reset_nop_engine(void *arg)
{
struct intel_gt *gt = arg;
struct i915_gpu_error *global = &gt->i915->gpu_error;
struct intel_engine_cs *engine;
enum intel_engine_id id;
/* Check that we can engine-reset during non-user portions */
if (!intel_has_reset_engine(gt))
return 0;
for_each_engine(engine, gt, id) {
unsigned int reset_count, reset_engine_count, count;
struct intel_context *ce;
IGT_TIMEOUT(end_time);
int err;
if (intel_engine_uses_guc(engine)) {
/* Engine level resets are triggered by GuC when a hang
* is detected. They can't be triggered by the KMD any
* more. Thus a nop batch cannot be used as a reset test
*/
continue;
}
ce = intel_context_create(engine);
if (IS_ERR(ce)) {
pr_err("[%s] Create context failed: %pe!\n", engine->name, ce);
return PTR_ERR(ce);
}
reset_count = i915_reset_count(global);
reset_engine_count = i915_reset_engine_count(global, engine);
count = 0;
st_engine_heartbeat_disable(engine);
GEM_BUG_ON(test_and_set_bit(I915_RESET_ENGINE + id,
&gt->reset.flags));
do {
int i;
if (!wait_for_idle(engine)) {
pr_err("%s failed to idle before reset\n",
engine->name);
err = -EIO;
break;
}
for (i = 0; i < 16; i++) {
struct i915_request *rq;
rq = intel_context_create_request(ce);
if (IS_ERR(rq)) {
struct drm_printer p =
drm_info_printer(gt->i915->drm.dev);
intel_engine_dump(engine, &p,
"%s(%s): failed to submit request\n",
__func__,
engine->name);
GEM_TRACE("%s(%s): failed to submit request\n",
__func__,
engine->name);
GEM_TRACE_DUMP();
intel_gt_set_wedged(gt);
err = PTR_ERR(rq);
break;
}
i915_request_add(rq);
}
err = intel_engine_reset(engine, NULL);
if (err) {
pr_err("intel_engine_reset(%s) failed, err:%d\n",
engine->name, err);
break;
}
if (i915_reset_count(global) != reset_count) {
pr_err("Full GPU reset recorded! (engine reset expected)\n");
err = -EINVAL;
break;
}
if (i915_reset_engine_count(global, engine) !=
reset_engine_count + ++count) {
pr_err("%s engine reset not recorded!\n",
engine->name);
err = -EINVAL;
break;
}
} while (time_before(jiffies, end_time));
clear_and_wake_up_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
st_engine_heartbeat_enable(engine);
pr_info("%s(%s): %d resets\n", __func__, engine->name, count);
intel_context_put(ce);
if (igt_flush_test(gt->i915))
err = -EIO;
if (err)
return err;
}
return 0;
}
static void force_reset_timeout(struct intel_engine_cs *engine)
{
engine->reset_timeout.probability = 999;
atomic_set(&engine->reset_timeout.times, -1);
}
static void cancel_reset_timeout(struct intel_engine_cs *engine)
{
memset(&engine->reset_timeout, 0, sizeof(engine->reset_timeout));
}
static int igt_reset_fail_engine(void *arg)
{
struct intel_gt *gt = arg;
struct intel_engine_cs *engine;
enum intel_engine_id id;
/* Check that we can recover from engine-reset failues */
if (!intel_has_reset_engine(gt))
return 0;
for_each_engine(engine, gt, id) {
unsigned int count;
struct intel_context *ce;
IGT_TIMEOUT(end_time);
int err;
/* Can't manually break the reset if i915 doesn't perform it */
if (intel_engine_uses_guc(engine))
continue;
ce = intel_context_create(engine);
if (IS_ERR(ce)) {
pr_err("[%s] Create context failed: %pe!\n", engine->name, ce);
return PTR_ERR(ce);
}
st_engine_heartbeat_disable(engine);
GEM_BUG_ON(test_and_set_bit(I915_RESET_ENGINE + id,
&gt->reset.flags));
force_reset_timeout(engine);
err = intel_engine_reset(engine, NULL);
cancel_reset_timeout(engine);
if (err == 0) /* timeouts only generated on gen8+ */
goto skip;
count = 0;
do {
struct i915_request *last = NULL;
int i;
if (!wait_for_idle(engine)) {
pr_err("%s failed to idle before reset\n",
engine->name);
err = -EIO;
break;
}
for (i = 0; i < count % 15; i++) {
struct i915_request *rq;
rq = intel_context_create_request(ce);
if (IS_ERR(rq)) {
struct drm_printer p =
drm_info_printer(gt->i915->drm.dev);
intel_engine_dump(engine, &p,
"%s(%s): failed to submit request\n",
__func__,
engine->name);
GEM_TRACE("%s(%s): failed to submit request\n",
__func__,
engine->name);
GEM_TRACE_DUMP();
intel_gt_set_wedged(gt);
if (last)
i915_request_put(last);
err = PTR_ERR(rq);
goto out;
}
if (last)
i915_request_put(last);
last = i915_request_get(rq);
i915_request_add(rq);
}
if (count & 1) {
err = intel_engine_reset(engine, NULL);
if (err) {
GEM_TRACE_ERR("intel_engine_reset(%s) failed, err:%d\n",
engine->name, err);
GEM_TRACE_DUMP();
i915_request_put(last);
break;
}
} else {
force_reset_timeout(engine);
err = intel_engine_reset(engine, NULL);
cancel_reset_timeout(engine);
if (err != -ETIMEDOUT) {
pr_err("intel_engine_reset(%s) did not fail, err:%d\n",
engine->name, err);
i915_request_put(last);
break;
}
}
err = 0;
if (last) {
if (i915_request_wait(last, 0, HZ / 2) < 0) {
struct drm_printer p =
drm_info_printer(gt->i915->drm.dev);
intel_engine_dump(engine, &p,
"%s(%s): failed to complete request\n",
__func__,
engine->name);
GEM_TRACE("%s(%s): failed to complete request\n",
__func__,
engine->name);
GEM_TRACE_DUMP();
err = -EIO;
}
i915_request_put(last);
}
count++;
} while (err == 0 && time_before(jiffies, end_time));
out:
pr_info("%s(%s): %d resets\n", __func__, engine->name, count);
skip:
clear_and_wake_up_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
st_engine_heartbeat_enable(engine);
intel_context_put(ce);
if (igt_flush_test(gt->i915))
err = -EIO;
if (err)
return err;
}
return 0;
}
static int __igt_reset_engine(struct intel_gt *gt, bool active)
{
struct i915_gpu_error *global = &gt->i915->gpu_error;
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(gt))
return 0;
if (active) {
err = hang_init(&h, gt);
if (err)
return err;
}
for_each_engine(engine, gt, id) {
unsigned int reset_count, reset_engine_count;
unsigned long count;
bool using_guc = intel_engine_uses_guc(engine);
IGT_TIMEOUT(end_time);
if (using_guc && !active)
continue;
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(global);
reset_engine_count = i915_reset_engine_count(global, engine);
st_engine_heartbeat_disable(engine);
GEM_BUG_ON(test_and_set_bit(I915_RESET_ENGINE + id,
&gt->reset.flags));
count = 0;
do {
struct i915_request *rq = NULL;
struct intel_selftest_saved_policy saved;
int err2;
err = intel_selftest_modify_policy(engine, &saved,
SELFTEST_SCHEDULER_MODIFY_FAST_RESET);
if (err) {
pr_err("[%s] Modify policy failed: %d!\n", engine->name, err);
break;
}
if (active) {
rq = hang_create_request(&h, engine);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
pr_err("[%s] Create hang request failed: %d!\n",
engine->name, err);
goto restore;
}
i915_request_get(rq);
i915_request_add(rq);
if (!wait_until_running(&h, rq)) {
struct drm_printer p = drm_info_printer(gt->i915->drm.dev);
pr_err("%s: Failed to start request %llx, 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;
goto restore;
}
}
if (!using_guc) {
err = intel_engine_reset(engine, NULL);
if (err) {
pr_err("intel_engine_reset(%s) failed, err:%d\n",
engine->name, err);
goto skip;
}
}
if (rq) {
/* Ensure the reset happens and kills the engine */
err = intel_selftest_wait_for_rq(rq);
if (err)
pr_err("[%s] Wait for request %lld:%lld [0x%04X] failed: %d!\n",
engine->name, rq->fence.context,
rq->fence.seqno, rq->context->guc_id.id, err);
}
skip:
if (rq)
i915_request_put(rq);
if (i915_reset_count(global) != reset_count) {
pr_err("Full GPU reset recorded! (engine reset expected)\n");
err = -EINVAL;
goto restore;
}
/* GuC based resets are not logged per engine */
if (!using_guc) {
if (i915_reset_engine_count(global, engine) !=
++reset_engine_count) {
pr_err("%s engine reset not recorded!\n",
engine->name);
err = -EINVAL;
goto restore;
}
}
count++;
restore:
err2 = intel_selftest_restore_policy(engine, &saved);
if (err2)
pr_err("[%s] Restore policy failed: %d!\n", engine->name, err);
if (err == 0)
err = err2;
if (err)
break;
} while (time_before(jiffies, end_time));
clear_and_wake_up_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
st_engine_heartbeat_enable(engine);
pr_info("%s: Completed %lu %s resets\n",
engine->name, count, active ? "active" : "idle");
if (err)
break;
err = igt_flush_test(gt->i915);
if (err) {
pr_err("[%s] Flush failed: %d!\n", engine->name, err);
break;
}
}
if (intel_gt_is_wedged(gt)) {
pr_err("GT is wedged!\n");
err = -EIO;
}
if (active)
hang_fini(&h);
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 kthread_worker *worker;
struct kthread_work work;
struct intel_engine_cs *engine;
unsigned long resets;
unsigned int flags;
bool stop;
int result;
};
#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, 10 * HZ) < 0) {
GEM_TRACE("%s timed out waiting for completion of fence %llx:%lld\n",
rq->engine->name,
rq->fence.context,
rq->fence.seqno);
GEM_TRACE_DUMP();
intel_gt_set_wedged(rq->engine->gt);
err = -EIO;
}
i915_request_put(rq);
return err;
}
static void active_engine(struct kthread_work *work)
{
I915_RND_STATE(prng);
struct active_engine *arg = container_of(work, typeof(*arg), work);
struct intel_engine_cs *engine = arg->engine;
struct i915_request *rq[8] = {};
struct intel_context *ce[ARRAY_SIZE(rq)];
unsigned long count;
int err = 0;
for (count = 0; count < ARRAY_SIZE(ce); count++) {
ce[count] = intel_context_create(engine);
if (IS_ERR(ce[count])) {
arg->result = PTR_ERR(ce[count]);
pr_err("[%s] Create context #%ld failed: %d!\n",
engine->name, count, arg->result);
while (--count)
intel_context_put(ce[count]);
return;
}
}
count = 0;
while (!READ_ONCE(arg->stop)) {
unsigned int idx = count++ & (ARRAY_SIZE(rq) - 1);
struct i915_request *old = rq[idx];
struct i915_request *new;
new = intel_context_create_request(ce[idx]);
if (IS_ERR(new)) {
err = PTR_ERR(new);
pr_err("[%s] Create request #%d failed: %d!\n", engine->name, idx, err);
break;
}
rq[idx] = i915_request_get(new);
i915_request_add(new);
if (engine->sched_engine->schedule && arg->flags & TEST_PRIORITY) {
struct i915_sched_attr attr = {
.priority =
i915_prandom_u32_max_state(512, &prng),
};
engine->sched_engine->schedule(rq[idx], &attr);
}
err = active_request_put(old);
if (err) {
pr_err("[%s] Request put failed: %d!\n", engine->name, err);
break;
}
cond_resched();
}
for (count = 0; count < ARRAY_SIZE(rq); count++) {
int err__ = active_request_put(rq[count]);
if (err)
pr_err("[%s] Request put #%ld failed: %d!\n", engine->name, count, err);
/* Keep the first error */
if (!err)
err = err__;
intel_context_put(ce[count]);
}
arg->result = err;
}
static int __igt_reset_engines(struct intel_gt *gt,
const char *test_name,
unsigned int flags)
{
struct i915_gpu_error *global = &gt->i915->gpu_error;
struct intel_engine_cs *engine, *other;
struct active_engine *threads;
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(gt))
return 0;
if (flags & TEST_ACTIVE) {
err = hang_init(&h, gt);
if (err)
return err;
if (flags & TEST_PRIORITY)
h.ctx->sched.priority = 1024;
}
threads = kmalloc_array(I915_NUM_ENGINES, sizeof(*threads), GFP_KERNEL);
if (!threads)
return -ENOMEM;
for_each_engine(engine, gt, id) {
unsigned long device = i915_reset_count(global);
unsigned long count = 0, reported;
bool using_guc = intel_engine_uses_guc(engine);
IGT_TIMEOUT(end_time);
if (flags & TEST_ACTIVE) {
if (!intel_engine_can_store_dword(engine))
continue;
} else if (using_guc)
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) * I915_NUM_ENGINES);
for_each_engine(other, gt, tmp) {
struct kthread_worker *worker;
threads[tmp].resets =
i915_reset_engine_count(global, other);
if (other == engine && !(flags & TEST_SELF))
continue;
if (other != engine && !(flags & TEST_OTHERS))
continue;
threads[tmp].engine = other;
threads[tmp].flags = flags;
worker = kthread_create_worker(0, "igt/%s",
other->name);
if (IS_ERR(worker)) {
err = PTR_ERR(worker);
pr_err("[%s] Worker create failed: %d!\n",
engine->name, err);
goto unwind;
}
threads[tmp].worker = worker;
kthread_init_work(&threads[tmp].work, active_engine);
kthread_queue_work(threads[tmp].worker,
&threads[tmp].work);
}
st_engine_heartbeat_disable_no_pm(engine);
GEM_BUG_ON(test_and_set_bit(I915_RESET_ENGINE + id,
&gt->reset.flags));
do {
struct i915_request *rq = NULL;
struct intel_selftest_saved_policy saved;
int err2;
err = intel_selftest_modify_policy(engine, &saved,
SELFTEST_SCHEDULER_MODIFY_FAST_RESET);
if (err) {
pr_err("[%s] Modify policy failed: %d!\n", engine->name, err);
break;
}
if (flags & TEST_ACTIVE) {
rq = hang_create_request(&h, engine);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
pr_err("[%s] Create hang request failed: %d!\n",
engine->name, err);
goto restore;
}
i915_request_get(rq);
i915_request_add(rq);
if (!wait_until_running(&h, rq)) {
struct drm_printer p = drm_info_printer(gt->i915->drm.dev);
pr_err("%s: Failed to start request %llx, 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;
goto restore;
}
} else {
intel_engine_pm_get(engine);
}
if (!using_guc) {
err = intel_engine_reset(engine, NULL);
if (err) {
pr_err("i915_reset_engine(%s:%s): failed, err=%d\n",
engine->name, test_name, err);
goto restore;
}
}
if (rq) {
/* Ensure the reset happens and kills the engine */
err = intel_selftest_wait_for_rq(rq);
if (err)
pr_err("[%s] Wait for request %lld:%lld [0x%04X] failed: %d!\n",
engine->name, rq->fence.context,
rq->fence.seqno, rq->context->guc_id.id, err);
}
count++;
if (rq) {
if (rq->fence.error != -EIO) {
pr_err("i915_reset_engine(%s:%s): failed to reset request %lld:%lld [0x%04X]\n",
engine->name, test_name,
rq->fence.context,
rq->fence.seqno, rq->context->guc_id.id);
i915_request_put(rq);
GEM_TRACE_DUMP();
intel_gt_set_wedged(gt);
err = -EIO;
goto restore;
}
if (i915_request_wait(rq, 0, HZ / 5) < 0) {
struct drm_printer p =
drm_info_printer(gt->i915->drm.dev);
pr_err("i915_reset_engine(%s:%s):"
" failed to complete request %llx:%lld after reset\n",
engine->name, test_name,
rq->fence.context,
rq->fence.seqno);
intel_engine_dump(engine, &p,
"%s\n", engine->name);
i915_request_put(rq);
GEM_TRACE_DUMP();
intel_gt_set_wedged(gt);
err = -EIO;
goto restore;
}
i915_request_put(rq);
}
if (!(flags & TEST_ACTIVE))
intel_engine_pm_put(engine);
if (!(flags & TEST_SELF) && !wait_for_idle(engine)) {
struct drm_printer p =
drm_info_printer(gt->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;
goto restore;
}
restore:
err2 = intel_selftest_restore_policy(engine, &saved);
if (err2)
pr_err("[%s] Restore policy failed: %d!\n", engine->name, err2);
if (err == 0)
err = err2;
if (err)
break;
} while (time_before(jiffies, end_time));
clear_and_wake_up_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
st_engine_heartbeat_enable_no_pm(engine);
pr_info("i915_reset_engine(%s:%s): %lu resets\n",
engine->name, test_name, count);
/* GuC based resets are not logged per engine */
if (!using_guc) {
reported = i915_reset_engine_count(global, engine);
reported -= threads[engine->id].resets;
if (reported != count) {
pr_err("i915_reset_engine(%s:%s): reset %lu times, but reported %lu\n",
engine->name, test_name, count, reported);
if (!err)
err = -EINVAL;
}
}
unwind:
for_each_engine(other, gt, tmp) {
int ret;
if (!threads[tmp].worker)
continue;
WRITE_ONCE(threads[tmp].stop, true);
kthread_flush_work(&threads[tmp].work);
ret = READ_ONCE(threads[tmp].result);
if (ret) {
pr_err("kthread for other engine %s failed, err=%d\n",
other->name, ret);
if (!err)
err = ret;
}
kthread_destroy_worker(threads[tmp].worker);
/* GuC based resets are not logged per engine */
if (!using_guc) {
if (other->uabi_class != engine->uabi_class &&
threads[tmp].resets !=
i915_reset_engine_count(global, other)) {
pr_err("Innocent engine %s was reset (count=%ld)\n",
other->name,
i915_reset_engine_count(global, other) -
threads[tmp].resets);
if (!err)
err = -EINVAL;
}
}
}
if (device != i915_reset_count(global)) {
pr_err("Global reset (count=%ld)!\n",
i915_reset_count(global) - device);
if (!err)
err = -EINVAL;
}
if (err)
break;
err = igt_flush_test(gt->i915);
if (err) {
pr_err("[%s] Flush failed: %d!\n", engine->name, err);
break;
}
}
kfree(threads);
if (intel_gt_is_wedged(gt))
err = -EIO;
if (flags & TEST_ACTIVE)
hang_fini(&h);
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_ACTIVE | TEST_PRIORITY | TEST_SELF,
},
{ }
};
struct intel_gt *gt = arg;
typeof(*phases) *p;
int err;
for (p = phases; p->name; p++) {
if (p->flags & TEST_PRIORITY) {
if (!(gt->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 intel_gt *gt, intel_engine_mask_t mask)
{
u32 count = i915_reset_count(&gt->i915->gpu_error);
intel_gt_reset(gt, mask, NULL);
return count;
}
static int igt_reset_wait(void *arg)
{
struct intel_gt *gt = arg;
struct i915_gpu_error *global = &gt->i915->gpu_error;
struct intel_engine_cs *engine;
struct i915_request *rq;
unsigned int reset_count;
struct hang h;
long timeout;
int err;
engine = intel_selftest_find_any_engine(gt);
if (!engine || !intel_engine_can_store_dword(engine))
return 0;
/* Check that we detect a stuck waiter and issue a reset */
igt_global_reset_lock(gt);
err = hang_init(&h, gt);
if (err) {
pr_err("[%s] Hang init failed: %d!\n", engine->name, err);
goto unlock;
}
rq = hang_create_request(&h, engine);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
pr_err("[%s] Create hang request failed: %d!\n", engine->name, err);
goto fini;
}
i915_request_get(rq);
i915_request_add(rq);
if (!wait_until_running(&h, rq)) {
struct drm_printer p = drm_info_printer(gt->i915->drm.dev);
pr_err("%s: Failed to start request %llx, at %x\n",
__func__, rq->fence.seqno, hws_seqno(&h, rq));
intel_engine_dump(rq->engine, &p, "%s\n", rq->engine->name);
intel_gt_set_wedged(gt);
err = -EIO;
goto out_rq;
}
reset_count = fake_hangcheck(gt, ALL_ENGINES);
timeout = i915_request_wait(rq, 0, 10);
if (timeout < 0) {
pr_err("i915_request_wait failed on a stuck request: err=%ld\n",
timeout);
err = timeout;
goto out_rq;
}
if (i915_reset_count(global) == 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:
igt_global_reset_unlock(gt);
if (intel_gt_is_wedged(gt))
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_mm_node evict = arg->vma->node;
int err;
complete(&arg->completion);
mutex_lock(&vm->mutex);
err = i915_gem_evict_for_node(vm, NULL, &evict, 0);
mutex_unlock(&vm->mutex);
return err;
}
static int evict_fence(void *data)
{
struct evict_vma *arg = data;
int err;
complete(&arg->completion);
/* 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);
return err;
}
err = i915_vma_pin(arg->vma, 0, 0, PIN_GLOBAL | PIN_MAPPABLE);
if (err) {
pr_err("Unable to pin vma for Y-tiled fence; err:%d\n", err);
return err;
}
err = i915_vma_pin_fence(arg->vma);
i915_vma_unpin(arg->vma);
if (err) {
pr_err("Unable to pin Y-tiled fence; err:%d\n", err);
return err;
}
i915_vma_unpin_fence(arg->vma);
return 0;
}
static int __igt_reset_evict_vma(struct intel_gt *gt,
struct i915_address_space *vm,
int (*fn)(void *),
unsigned int flags)
{
struct intel_engine_cs *engine;
struct drm_i915_gem_object *obj;
struct task_struct *tsk = NULL;
struct i915_request *rq;
struct evict_vma arg;
struct hang h;
unsigned int pin_flags;
int err;
if (!gt->ggtt->num_fences && flags & EXEC_OBJECT_NEEDS_FENCE)
return 0;
engine = intel_selftest_find_any_engine(gt);
if (!engine || !intel_engine_can_store_dword(engine))
return 0;
/* Check that we can recover an unbind stuck on a hanging request */
err = hang_init(&h, gt);
if (err) {
pr_err("[%s] Hang init failed: %d!\n", engine->name, err);
return err;
}
obj = i915_gem_object_create_internal(gt->i915, SZ_1M);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
pr_err("[%s] Create object failed: %d!\n", engine->name, err);
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);
pr_err("[%s] VMA instance failed: %d!\n", engine->name, err);
goto out_obj;
}
rq = hang_create_request(&h, engine);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
pr_err("[%s] Create hang request failed: %d!\n", engine->name, err);
goto out_obj;
}
pin_flags = i915_vma_is_ggtt(arg.vma) ? PIN_GLOBAL : PIN_USER;
if (flags & EXEC_OBJECT_NEEDS_FENCE)
pin_flags |= PIN_MAPPABLE;
err = i915_vma_pin(arg.vma, 0, 0, pin_flags);
if (err) {
i915_request_add(rq);
pr_err("[%s] VMA pin failed: %d!\n", engine->name, err);
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 = igt_vma_move_to_active_unlocked(arg.vma, rq, flags);
if (err)
pr_err("[%s] Move to active failed: %d!\n", engine->name, err);
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;
if (!wait_until_running(&h, rq)) {
struct drm_printer p = drm_info_printer(gt->i915->drm.dev);
pr_err("%s: Failed to start request %llx, at %x\n",
__func__, rq->fence.seqno, hws_seqno(&h, rq));
intel_engine_dump(rq->engine, &p, "%s\n", rq->engine->name);
intel_gt_set_wedged(gt);
goto out_reset;
}
init_completion(&arg.completion);
tsk = kthread_run(fn, &arg, "igt/evict_vma");
if (IS_ERR(tsk)) {
err = PTR_ERR(tsk);
pr_err("[%s] Thread spawn failed: %d!\n", engine->name, err);
tsk = NULL;
goto out_reset;
}
get_task_struct(tsk);
wait_for_completion(&arg.completion);
if (wait_for(!list_empty(&rq->fence.cb_list), 10)) {
struct drm_printer p = drm_info_printer(gt->i915->drm.dev);
pr_err("igt/evict_vma kthread did not wait\n");
intel_engine_dump(rq->engine, &p, "%s\n", rq->engine->name);
intel_gt_set_wedged(gt);
goto out_reset;
}
out_reset:
igt_global_reset_lock(gt);
fake_hangcheck(gt, rq->engine->mask);
igt_global_reset_unlock(gt);
if (tsk) {
struct intel_wedge_me w;
/* The reset, even indirectly, should take less than 10ms. */
intel_wedge_on_timeout(&w, gt, HZ / 10 /* 100ms */)
err = kthread_stop(tsk);
put_task_struct(tsk);
}
out_rq:
i915_request_put(rq);
out_obj:
i915_gem_object_put(obj);
fini:
hang_fini(&h);
if (intel_gt_is_wedged(gt))
return -EIO;
return err;
}
static int igt_reset_evict_ggtt(void *arg)
{
struct intel_gt *gt = arg;
return __igt_reset_evict_vma(gt, &gt->ggtt->vm,
evict_vma, EXEC_OBJECT_WRITE);
}
static int igt_reset_evict_ppgtt(void *arg)
{
struct intel_gt *gt = arg;
struct i915_ppgtt *ppgtt;
int err;
/* aliasing == global gtt locking, covered above */
if (INTEL_PPGTT(gt->i915) < INTEL_PPGTT_FULL)
return 0;
ppgtt = i915_ppgtt_create(gt, 0);
if (IS_ERR(ppgtt))
return PTR_ERR(ppgtt);
err = __igt_reset_evict_vma(gt, &ppgtt->vm,
evict_vma, EXEC_OBJECT_WRITE);
i915_vm_put(&ppgtt->vm);
return err;
}
static int igt_reset_evict_fence(void *arg)
{
struct intel_gt *gt = arg;
return __igt_reset_evict_vma(gt, &gt->ggtt->vm,
evict_fence, EXEC_OBJECT_NEEDS_FENCE);
}
static int wait_for_others(struct intel_gt *gt,
struct intel_engine_cs *exclude)
{
struct intel_engine_cs *engine;
enum intel_engine_id id;
for_each_engine(engine, gt, id) {
if (engine == exclude)
continue;
if (!wait_for_idle(engine))
return -EIO;
}
return 0;
}
static int igt_reset_queue(void *arg)
{
struct intel_gt *gt = arg;
struct i915_gpu_error *global = &gt->i915->gpu_error;
struct intel_engine_cs *engine;
enum intel_engine_id id;
struct hang h;
int err;
/* Check that we replay pending requests following a hang */
igt_global_reset_lock(gt);
err = hang_init(&h, gt);
if (err)
goto unlock;
for_each_engine(engine, gt, id) {
struct intel_selftest_saved_policy saved;
struct i915_request *prev;
IGT_TIMEOUT(end_time);
unsigned int count;
bool using_guc = intel_engine_uses_guc(engine);
if (!intel_engine_can_store_dword(engine))
continue;
if (using_guc) {
err = intel_selftest_modify_policy(engine, &saved,
SELFTEST_SCHEDULER_MODIFY_NO_HANGCHECK);
if (err) {
pr_err("[%s] Modify policy failed: %d!\n", engine->name, err);
goto fini;
}
}
prev = hang_create_request(&h, engine);
if (IS_ERR(prev)) {
err = PTR_ERR(prev);
pr_err("[%s] Create 'prev' hang request failed: %d!\n", engine->name, err);
goto restore;
}
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);
pr_err("[%s] Create hang request failed: %d!\n", engine->name, err);
goto restore;
}
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(gt, 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();
intel_gt_set_wedged(gt);
goto restore;
}
if (!wait_until_running(&h, prev)) {
struct drm_printer p = drm_info_printer(gt->i915->drm.dev);
pr_err("%s(%s): Failed to start request %llx, 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);
intel_gt_set_wedged(gt);
err = -EIO;
goto restore;
}
reset_count = fake_hangcheck(gt, BIT(id));
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 restore;
}
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 restore;
}
if (i915_reset_count(global) == reset_count) {
pr_err("No GPU reset recorded!\n");
i915_request_put(rq);
i915_request_put(prev);
err = -EINVAL;
goto restore;
}
i915_request_put(prev);
prev = rq;
count++;
} while (time_before(jiffies, end_time));
pr_info("%s: Completed %d queued resets\n",
engine->name, count);
*h.batch = MI_BATCH_BUFFER_END;
intel_gt_chipset_flush(engine->gt);
i915_request_put(prev);
restore:
if (using_guc) {
int err2 = intel_selftest_restore_policy(engine, &saved);
if (err2)
pr_err("%s:%d> [%s] Restore policy failed: %d!\n",
__func__, __LINE__, engine->name, err2);
if (err == 0)
err = err2;
}
if (err)
goto fini;
err = igt_flush_test(gt->i915);
if (err) {
pr_err("[%s] Flush failed: %d!\n", engine->name, err);
break;
}
}
fini:
hang_fini(&h);
unlock:
igt_global_reset_unlock(gt);
if (intel_gt_is_wedged(gt))
return -EIO;
return err;
}
static int igt_handle_error(void *arg)
{
struct intel_gt *gt = arg;
struct i915_gpu_error *global = &gt->i915->gpu_error;
struct intel_engine_cs *engine;
struct hang h;
struct i915_request *rq;
struct i915_gpu_coredump *error;
int err;
engine = intel_selftest_find_any_engine(gt);
/* Check that we can issue a global GPU and engine reset */
if (!intel_has_reset_engine(gt))
return 0;
if (!engine || !intel_engine_can_store_dword(engine))
return 0;
err = hang_init(&h, gt);
if (err) {
pr_err("[%s] Hang init failed: %d!\n", engine->name, err);
return err;
}
rq = hang_create_request(&h, engine);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
pr_err("[%s] Create hang request failed: %d!\n", engine->name, err);
goto err_fini;
}
i915_request_get(rq);
i915_request_add(rq);
if (!wait_until_running(&h, rq)) {
struct drm_printer p = drm_info_printer(gt->i915->drm.dev);
pr_err("%s: Failed to start request %llx, at %x\n",
__func__, rq->fence.seqno, hws_seqno(&h, rq));
intel_engine_dump(rq->engine, &p, "%s\n", rq->engine->name);
intel_gt_set_wedged(gt);
err = -EIO;
goto err_request;
}
/* Temporarily disable error capture */
error = xchg(&global->first_error, (void *)-1);
intel_gt_handle_error(gt, engine->mask, 0, NULL);
xchg(&global->first_error, error);
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);
return err;
}
static int __igt_atomic_reset_engine(struct intel_engine_cs *engine,
const struct igt_atomic_section *p,
const char *mode)
{
struct tasklet_struct * const t = &engine->sched_engine->tasklet;
int err;
GEM_TRACE("i915_reset_engine(%s:%s) under %s\n",
engine->name, mode, p->name);
if (t->func)
tasklet_disable(t);
if (strcmp(p->name, "softirq"))
local_bh_disable();
p->critical_section_begin();
err = __intel_engine_reset_bh(engine, NULL);
p->critical_section_end();
if (strcmp(p->name, "softirq"))
local_bh_enable();
if (t->func) {
tasklet_enable(t);
tasklet_hi_schedule(t);
}
if (err)
pr_err("i915_reset_engine(%s:%s) failed under %s\n",
engine->name, mode, p->name);
return err;
}
static int igt_atomic_reset_engine(struct intel_engine_cs *engine,
const struct igt_atomic_section *p)
{
struct i915_request *rq;
struct hang h;
int err;
err = __igt_atomic_reset_engine(engine, p, "idle");
if (err)
return err;
err = hang_init(&h, engine->gt);
if (err) {
pr_err("[%s] Hang init failed: %d!\n", engine->name, err);
return err;
}
rq = hang_create_request(&h, engine);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
pr_err("[%s] Create hang request failed: %d!\n", engine->name, err);
goto out;
}
i915_request_get(rq);
i915_request_add(rq);
if (wait_until_running(&h, rq)) {
err = __igt_atomic_reset_engine(engine, p, "active");
} else {
pr_err("%s(%s): Failed to start request %llx, at %x\n",
__func__, engine->name,
rq->fence.seqno, hws_seqno(&h, rq));
intel_gt_set_wedged(engine->gt);
err = -EIO;
}
if (err == 0) {
struct intel_wedge_me w;
intel_wedge_on_timeout(&w, engine->gt, HZ / 20 /* 50ms */)
i915_request_wait(rq, 0, MAX_SCHEDULE_TIMEOUT);
if (intel_gt_is_wedged(engine->gt))
err = -EIO;
}
i915_request_put(rq);
out:
hang_fini(&h);
return err;
}
static int igt_reset_engines_atomic(void *arg)
{
struct intel_gt *gt = arg;
const typeof(*igt_atomic_phases) *p;
int err = 0;
/* Check that the engines resets are usable from atomic context */
if (!intel_has_reset_engine(gt))
return 0;
if (intel_uc_uses_guc_submission(&gt->uc))
return 0;
igt_global_reset_lock(gt);
/* Flush any requests before we get started and check basics */
if (!igt_force_reset(gt))
goto unlock;
for (p = igt_atomic_phases; p->name; p++) {
struct intel_engine_cs *engine;
enum intel_engine_id id;
for_each_engine(engine, gt, id) {
err = igt_atomic_reset_engine(engine, p);
if (err)
goto out;
}
}
out:
/* As we poke around the guts, do a full reset before continuing. */
igt_force_reset(gt);
unlock:
igt_global_reset_unlock(gt);
return err;
}
int intel_hangcheck_live_selftests(struct drm_i915_private *i915)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_hang_sanitycheck),
SUBTEST(igt_reset_nop),
SUBTEST(igt_reset_nop_engine),
SUBTEST(igt_reset_idle_engine),
SUBTEST(igt_reset_active_engine),
SUBTEST(igt_reset_fail_engine),
SUBTEST(igt_reset_engines),
SUBTEST(igt_reset_engines_atomic),
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),
};
struct intel_gt *gt = to_gt(i915);
intel_wakeref_t wakeref;
int err;
if (!intel_has_gpu_reset(gt))
return 0;
if (intel_gt_is_wedged(gt))
return -EIO; /* we're long past hope of a successful reset */
wakeref = intel_runtime_pm_get(gt->uncore->rpm);
err = intel_gt_live_subtests(tests, gt);
intel_runtime_pm_put(gt->uncore->rpm, wakeref);
return err;
}