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drm/i915: Defer application of request banning to submission 

As we currently do not check on submission whether the context is banned
in a timely manner it is possible for some requests to escape
cancellation after their parent context is banned. By moving the ban
into the request submission under the engine->timeline.lock, we
serialise it with the reset and setting of the context ban.

References: eb8d0f5af4 ("drm/i915: Remove GPU reset dependence on struct_mutex")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190213182737.12695-1-chris@chris-wilson.co.uk
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
This commit is contained in:
Chris Wilson 2019-02-13 18:27:37 +00:00
parent c836eb79c0
commit d9e61b66a5
2 changed files with 8 additions and 14 deletions
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3
drivers/gpu/drm/i915/i915_request.c
View File

@ -366,6 +366,9 @@ void __i915_request_submit(struct i915_request *request)
GEM_BUG_ON(!irqs_disabled());
lockdep_assert_held(&engine->timeline.lock);
if (i915_gem_context_is_banned(request->gem_context))
i915_request_skip(request, -EIO);
GEM_BUG_ON(request->global_seqno);
seqno = next_global_seqno(&engine->timeline);

19
drivers/gpu/drm/i915/i915_reset.c
View File

@ -22,24 +22,15 @@ static void engine_skip_context(struct i915_request *rq)
{
struct intel_engine_cs *engine = rq->engine;
struct i915_gem_context *hung_ctx = rq->gem_context;
struct i915_timeline *timeline = rq->timeline;
lockdep_assert_held(&engine->timeline.lock);
GEM_BUG_ON(timeline == &engine->timeline);
spin_lock(&timeline->lock);
if (!i915_request_is_active(rq))
return;
if (i915_request_is_active(rq)) {
list_for_each_entry_continue(rq,
&engine->timeline.requests, link)
if (rq->gem_context == hung_ctx)
i915_request_skip(rq, -EIO);
}
list_for_each_entry(rq, &timeline->requests, link)
i915_request_skip(rq, -EIO);
spin_unlock(&timeline->lock);
list_for_each_entry_continue(rq, &engine->timeline.requests, link)
if (rq->gem_context == hung_ctx)
i915_request_skip(rq, -EIO);
}
static void client_mark_guilty(struct drm_i915_file_private *file_priv,