Commit 2c66555e authored by Chris Wilson's avatar Chris Wilson

drm/i915/selftests: Add basic sanitychecks for execlists

Before adding a new feature to execlists submission, we should endeavour
to cover the baseline behaviour with selftests. So start the ball
rolling.
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Michał Winiarski <michal.winiarski@intel.com>
CC: Michel Thierry <michel.thierry@intel.com>
Cc: Jeff McGee <jeff.mcgee@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: default avatarJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180404093329.5383-1-chris@chris-wilson.co.uk
parent 6be1187d
......@@ -2609,3 +2609,7 @@ void intel_lr_context_resume(struct drm_i915_private *dev_priv)
}
}
}
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
#include "selftests/intel_lrc.c"
#endif
......@@ -20,4 +20,5 @@ selftest(evict, i915_gem_evict_live_selftests)
selftest(hugepages, i915_gem_huge_page_live_selftests)
selftest(contexts, i915_gem_context_live_selftests)
selftest(hangcheck, intel_hangcheck_live_selftests)
selftest(execlists, intel_execlists_live_selftests)
selftest(guc, intel_guc_live_selftest)
/*
* SPDX-License-Identifier: MIT
*
* Copyright © 2018 Intel Corporation
*/
#include "../i915_selftest.h"
#include "mock_context.h"
struct spinner {
struct drm_i915_private *i915;
struct drm_i915_gem_object *hws;
struct drm_i915_gem_object *obj;
u32 *batch;
void *seqno;
};
static int spinner_init(struct spinner *spin, struct drm_i915_private *i915)
{
unsigned int mode;
void *vaddr;
int err;
GEM_BUG_ON(INTEL_GEN(i915) < 8);
memset(spin, 0, sizeof(*spin));
spin->i915 = i915;
spin->hws = i915_gem_object_create_internal(i915, PAGE_SIZE);
if (IS_ERR(spin->hws)) {
err = PTR_ERR(spin->hws);
goto err;
}
spin->obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
if (IS_ERR(spin->obj)) {
err = PTR_ERR(spin->obj);
goto err_hws;
}
i915_gem_object_set_cache_level(spin->hws, I915_CACHE_LLC);
vaddr = i915_gem_object_pin_map(spin->hws, I915_MAP_WB);
if (IS_ERR(vaddr)) {
err = PTR_ERR(vaddr);
goto err_obj;
}
spin->seqno = memset(vaddr, 0xff, PAGE_SIZE);
mode = HAS_LLC(i915) ? I915_MAP_WB : I915_MAP_WC;
vaddr = i915_gem_object_pin_map(spin->obj, mode);
if (IS_ERR(vaddr)) {
err = PTR_ERR(vaddr);
goto err_unpin_hws;
}
spin->batch = vaddr;
return 0;
err_unpin_hws:
i915_gem_object_unpin_map(spin->hws);
err_obj:
i915_gem_object_put(spin->obj);
err_hws:
i915_gem_object_put(spin->hws);
err:
return err;
}
static unsigned int seqno_offset(u64 fence)
{
return offset_in_page(sizeof(u32) * fence);
}
static u64 hws_address(const struct i915_vma *hws,
const struct i915_request *rq)
{
return hws->node.start + seqno_offset(rq->fence.context);
}
static int emit_recurse_batch(struct spinner *spin,
struct i915_request *rq,
u32 arbitration_command)
{
struct i915_address_space *vm = &rq->ctx->ppgtt->base;
struct i915_vma *hws, *vma;
u32 *batch;
int err;
vma = i915_vma_instance(spin->obj, vm, NULL);
if (IS_ERR(vma))
return PTR_ERR(vma);
hws = i915_vma_instance(spin->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;
i915_vma_move_to_active(vma, rq, 0);
if (!i915_gem_object_has_active_reference(vma->obj)) {
i915_gem_object_get(vma->obj);
i915_gem_object_set_active_reference(vma->obj);
}
i915_vma_move_to_active(hws, rq, 0);
if (!i915_gem_object_has_active_reference(hws->obj)) {
i915_gem_object_get(hws->obj);
i915_gem_object_set_active_reference(hws->obj);
}
batch = spin->batch;
*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++ = arbitration_command;
*batch++ = MI_BATCH_BUFFER_START | 1 << 8 | 1;
*batch++ = lower_32_bits(vma->node.start);
*batch++ = upper_32_bits(vma->node.start);
*batch++ = MI_BATCH_BUFFER_END; /* not reached */
i915_gem_chipset_flush(spin->i915);
err = rq->engine->emit_bb_start(rq, vma->node.start, PAGE_SIZE, 0);
i915_vma_unpin(hws);
unpin_vma:
i915_vma_unpin(vma);
return err;
}
static struct i915_request *
spinner_create_request(struct spinner *spin,
struct i915_gem_context *ctx,
struct intel_engine_cs *engine,
u32 arbitration_command)
{
struct i915_request *rq;
int err;
rq = i915_request_alloc(engine, ctx);
if (IS_ERR(rq))
return rq;
err = emit_recurse_batch(spin, rq, arbitration_command);
if (err) {
__i915_request_add(rq, false);
return ERR_PTR(err);
}
return rq;
}
static u32 hws_seqno(const struct spinner *spin, const struct i915_request *rq)
{
u32 *seqno = spin->seqno + seqno_offset(rq->fence.context);
return READ_ONCE(*seqno);
}
struct wedge_me {
struct delayed_work work;
struct drm_i915_private *i915;
const void *symbol;
};
static void wedge_me(struct work_struct *work)
{
struct wedge_me *w = container_of(work, typeof(*w), work.work);
pr_err("%pS timed out, cancelling all further testing.\n", w->symbol);
GEM_TRACE("%pS timed out.\n", w->symbol);
GEM_TRACE_DUMP();
i915_gem_set_wedged(w->i915);
}
static void __init_wedge(struct wedge_me *w,
struct drm_i915_private *i915,
long timeout,
const void *symbol)
{
w->i915 = i915;
w->symbol = symbol;
INIT_DELAYED_WORK_ONSTACK(&w->work, wedge_me);
schedule_delayed_work(&w->work, timeout);
}
static void __fini_wedge(struct wedge_me *w)
{
cancel_delayed_work_sync(&w->work);
destroy_delayed_work_on_stack(&w->work);
w->i915 = NULL;
}
#define wedge_on_timeout(W, DEV, TIMEOUT) \
for (__init_wedge((W), (DEV), (TIMEOUT), __builtin_return_address(0)); \
(W)->i915; \
__fini_wedge((W)))
static noinline int
flush_test(struct drm_i915_private *i915, unsigned int flags)
{
struct wedge_me w;
cond_resched();
wedge_on_timeout(&w, i915, HZ)
i915_gem_wait_for_idle(i915, flags);
return i915_terminally_wedged(&i915->gpu_error) ? -EIO : 0;
}
static void spinner_end(struct spinner *spin)
{
*spin->batch = MI_BATCH_BUFFER_END;
i915_gem_chipset_flush(spin->i915);
}
static void spinner_fini(struct spinner *spin)
{
spinner_end(spin);
i915_gem_object_unpin_map(spin->obj);
i915_gem_object_put(spin->obj);
i915_gem_object_unpin_map(spin->hws);
i915_gem_object_put(spin->hws);
}
static bool wait_for_spinner(struct spinner *spin, struct i915_request *rq)
{
if (!wait_event_timeout(rq->execute,
READ_ONCE(rq->global_seqno),
msecs_to_jiffies(10)))
return false;
return !(wait_for_us(i915_seqno_passed(hws_seqno(spin, rq),
rq->fence.seqno),
10) &&
wait_for(i915_seqno_passed(hws_seqno(spin, rq),
rq->fence.seqno),
1000));
}
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 spinner spin;
int err = -ENOMEM;
if (!HAS_LOGICAL_RING_CONTEXTS(i915))
return 0;
mutex_lock(&i915->drm.struct_mutex);
if (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 = spinner_create_request(&spin, ctx, engine, MI_NOOP);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
goto err_ctx;
}
i915_request_add(rq);
if (!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;
}
spinner_end(&spin);
if (flush_test(i915, I915_WAIT_LOCKED)) {
err = -EIO;
goto err_ctx;
}
}
err = 0;
err_ctx:
kernel_context_close(ctx);
err_spin:
spinner_fini(&spin);
err_unlock:
flush_test(i915, I915_WAIT_LOCKED);
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 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);
if (spinner_init(&spin_hi, i915))
goto err_unlock;
if (spinner_init(&spin_lo, i915))
goto err_spin_hi;
ctx_hi = kernel_context(i915);
if (!ctx_hi)
goto err_spin_lo;
ctx_hi->priority = I915_CONTEXT_MAX_USER_PRIORITY;
ctx_lo = kernel_context(i915);
if (!ctx_lo)
goto err_ctx_hi;
ctx_lo->priority = I915_CONTEXT_MIN_USER_PRIORITY;
for_each_engine(engine, i915, id) {
struct i915_request *rq;
rq = 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 (!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 = spinner_create_request(&spin_hi, ctx_hi, engine,
MI_ARB_CHECK);
if (IS_ERR(rq)) {
spinner_end(&spin_lo);
err = PTR_ERR(rq);
goto err_ctx_lo;
}
i915_request_add(rq);
if (!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;
}
spinner_end(&spin_hi);
spinner_end(&spin_lo);
if (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:
spinner_fini(&spin_lo);
err_spin_hi:
spinner_fini(&spin_hi);
err_unlock:
flush_test(i915, I915_WAIT_LOCKED);
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 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);
if (spinner_init(&spin_hi, i915))
goto err_unlock;
if (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 = 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 (!wait_for_spinner(&spin_lo, rq)) {
pr_err("First context failed to start\n");
goto err_wedged;
}
rq = spinner_create_request(&spin_hi, ctx_hi, engine, MI_NOOP);
if (IS_ERR(rq)) {
spinner_end(&spin_lo);
err = PTR_ERR(rq);
goto err_ctx_lo;
}
i915_request_add(rq);
if (wait_for_spinner(&spin_hi, rq)) {
pr_err("Second context overtook first?\n");
goto err_wedged;
}
engine->schedule(rq, I915_PRIORITY_MAX);
if (!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;
}
spinner_end(&spin_hi);
spinner_end(&spin_lo);
if (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:
spinner_fini(&spin_lo);
err_spin_hi:
spinner_fini(&spin_hi);
err_unlock:
flush_test(i915, I915_WAIT_LOCKED);
mutex_unlock(&i915->drm.struct_mutex);
return err;
err_wedged:
spinner_end(&spin_hi);
spinner_end(&spin_lo);
i915_gem_set_wedged(i915);
err = -EIO;
goto err_ctx_lo;
}
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),
};
return i915_subtests(tests, i915);
}
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