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drm/i915: Introduce engine_skip_context 

Add a new function for skipping all pending requests
for a context in order to make engine reset flow more
readable.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484668747-9120-2-git-send-email-mika.kuoppala@intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Mika Kuoppala 2017-01-17 17:59:02 +02:00 committed by Chris Wilson
parent 4c96554365
commit 36193acd54
1 changed files with 27 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
drivers/gpu/drm/i915/i915_gem.c
View File

@ -2604,6 +2604,7 @@ i915_gem_find_active_request(struct intel_engine_cs *engine)
if (__i915_gem_request_completed(request))
continue;
GEM_BUG_ON(request->engine != engine);
return request;
}
@ -2622,7 +2623,7 @@ void i915_gem_reset_prepare(struct drm_i915_private *dev_priv)
i915_gem_revoke_fences(dev_priv);
}
static void reset_request(struct drm_i915_gem_request *request)
static void skip_request(struct drm_i915_gem_request *request)
{
void *vaddr = request->ring->vaddr;
u32 head;
@ -2641,12 +2642,33 @@ static void reset_request(struct drm_i915_gem_request *request)
dma_fence_set_error(&request->fence, -EIO);
}
static void engine_skip_context(struct drm_i915_gem_request *request)
{
struct intel_engine_cs *engine = request->engine;
struct i915_gem_context *hung_ctx = request->ctx;
struct intel_timeline *timeline;
unsigned long flags;
timeline = i915_gem_context_lookup_timeline(hung_ctx, engine);
spin_lock_irqsave(&engine->timeline->lock, flags);
spin_lock(&timeline->lock);
list_for_each_entry_continue(request, &engine->timeline->requests, link)
if (request->ctx == hung_ctx)
skip_request(request);
list_for_each_entry(request, &timeline->requests, link)
skip_request(request);
spin_unlock(&timeline->lock);
spin_unlock_irqrestore(&engine->timeline->lock, flags);
}
static void i915_gem_reset_engine(struct intel_engine_cs *engine)
{
struct drm_i915_gem_request *request;
struct i915_gem_context *hung_ctx;
struct intel_timeline *timeline;
unsigned long flags;
bool ring_hung;
if (engine->irq_seqno_barrier)
@ -2668,7 +2690,7 @@ static void i915_gem_reset_engine(struct intel_engine_cs *engine)
if (ring_hung) {
i915_gem_context_mark_guilty(hung_ctx);
reset_request(request);
skip_request(request);
} else {
i915_gem_context_mark_innocent(hung_ctx);
dma_fence_set_error(&request->fence, -EAGAIN);
@ -2696,20 +2718,7 @@ static void i915_gem_reset_engine(struct intel_engine_cs *engine)
if (i915_gem_context_is_default(hung_ctx))
return;
timeline = i915_gem_context_lookup_timeline(hung_ctx, engine);
spin_lock_irqsave(&engine->timeline->lock, flags);
spin_lock(&timeline->lock);
list_for_each_entry_continue(request, &engine->timeline->requests, link)
if (request->ctx == hung_ctx)
reset_request(request);
list_for_each_entry(request, &timeline->requests, link)
reset_request(request);
spin_unlock(&timeline->lock);
spin_unlock_irqrestore(&engine->timeline->lock, flags);
engine_skip_context(request);
}
void i915_gem_reset_finish(struct drm_i915_private *dev_priv)