On 16/09/2020 10:42, Chris Wilson wrote:
Verify that if a context is active at the time it is closed, that it is
either persistent and preemptible (with hangcheck running) or it shall
be removed from execution.
Fixes: 9a40bddd47ca ("drm/i915/gt: Expose heartbeat interval via sysfs")
Testcase: igt/gem_ctx_persistence/heartbeat-close
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v5.7+
---
drivers/gpu/drm/i915/gem/i915_gem_context.c | 48 +++++----------------
1 file changed, 10 insertions(+), 38 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index a548626fa8bc..4fd38101bb56 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -390,24 +390,6 @@ __context_engines_static(const struct i915_gem_context *ctx)
return rcu_dereference_protected(ctx->engines, true);
}
-static bool __reset_engine(struct intel_engine_cs *engine)
-{
- struct intel_gt *gt = engine->gt;
- bool success = false;
-
- if (!intel_has_reset_engine(gt))
- return false;
-
- if (!test_and_set_bit(I915_RESET_ENGINE + engine->id,
- >->reset.flags)) {
- success = intel_engine_reset(engine, NULL) == 0;
- clear_and_wake_up_bit(I915_RESET_ENGINE + engine->id,
- >->reset.flags);
- }
-
- return success;
-}
-
static void __reset_context(struct i915_gem_context *ctx,
struct intel_engine_cs *engine)
{
@@ -431,12 +413,7 @@ static bool __cancel_engine(struct intel_engine_cs *engine)
* kill the banned context, we fallback to doing a local reset
* instead.
*/
- if (IS_ACTIVE(CONFIG_DRM_I915_PREEMPT_TIMEOUT) &&
- !intel_engine_pulse(engine))
- return true;
-
- /* If we are unable to send a pulse, try resetting this engine. */
- return __reset_engine(engine);
+ return intel_engine_pulse(engine) == 0;
Where is the path now which actually resets the currently running
workload (engine) of a non-persistent context? Pulse will be sent and
then rely on hangcheck but otherwise let it run?
Regards,
Tvrtko
}
static bool
@@ -506,7 +483,7 @@ static struct intel_engine_cs *active_engine(struct intel_context *ce)
return engine;
}
-static void kill_engines(struct i915_gem_engines *engines)
+static void kill_engines(struct i915_gem_engines *engines, bool ban)
{
struct i915_gem_engines_iter it;
struct intel_context *ce;
@@ -521,7 +498,7 @@ static void kill_engines(struct i915_gem_engines *engines)
for_each_gem_engine(ce, engines, it) {
struct intel_engine_cs *engine;
- if (intel_context_set_banned(ce))
+ if (ban && intel_context_set_banned(ce))
continue;
/*
@@ -534,7 +511,7 @@ static void kill_engines(struct i915_gem_engines *engines)
engine = active_engine(ce);
/* First attempt to gracefully cancel the context */
- if (engine && !__cancel_engine(engine))
+ if (engine && !__cancel_engine(engine) && ban)
/*
* If we are unable to send a preemptive pulse to bump
* the context from the GPU, we have to resort to a full
@@ -544,8 +521,10 @@ static void kill_engines(struct i915_gem_engines *engines)
}
}
-static void kill_stale_engines(struct i915_gem_context *ctx)
+static void kill_context(struct i915_gem_context *ctx)
{
+ bool ban = (!i915_gem_context_is_persistent(ctx) ||
+ !ctx->i915->params.enable_hangcheck);
struct i915_gem_engines *pos, *next;
spin_lock_irq(&ctx->stale.lock);
@@ -558,7 +537,7 @@ static void kill_stale_engines(struct i915_gem_context *ctx)
spin_unlock_irq(&ctx->stale.lock);
- kill_engines(pos);
+ kill_engines(pos, ban);
spin_lock_irq(&ctx->stale.lock);
GEM_BUG_ON(i915_sw_fence_signaled(&pos->fence));
@@ -570,11 +549,6 @@ static void kill_stale_engines(struct i915_gem_context *ctx)
spin_unlock_irq(&ctx->stale.lock);
}
-static void kill_context(struct i915_gem_context *ctx)
-{
- kill_stale_engines(ctx);
-}
-
static void engines_idle_release(struct i915_gem_context *ctx,
struct i915_gem_engines *engines)
{
@@ -609,7 +583,7 @@ static void engines_idle_release(struct i915_gem_context *ctx,
kill:
if (list_empty(&engines->link)) /* raced, already closed */
- kill_engines(engines);
+ kill_engines(engines, true);
i915_sw_fence_commit(&engines->fence);
}
@@ -667,9 +641,7 @@ static void context_close(struct i915_gem_context *ctx)
* case we opt to forcibly kill off all remaining requests on
* context close.
*/
- if (!i915_gem_context_is_persistent(ctx) ||
- !ctx->i915->params.enable_hangcheck)
- kill_context(ctx);
+ kill_context(ctx);
i915_gem_context_put(ctx);
}
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