From cba17e5d647b4dabb3c9d8bc1bf2636f1a3a9687 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Tue, 25 Jun 2019 20:48:59 +0100 Subject: [PATCH] drm/i915/gt: Add some debug tracing for context pinning Add the context pin/unpin events to the trace for post-mortem debugging. Signed-off-by: Chris Wilson Reviewed-by: Matthew Auld Link: https://patchwork.freedesktop.org/patch/msgid/20190625194859.28005-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/gt/intel_context.c | 10 ++++++++++ drivers/gpu/drm/i915/gt/intel_ringbuffer.c | 3 +++ 2 files changed, 13 insertions(+) diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c index 938dd032b820..1110fc8f657a 100644 --- a/drivers/gpu/drm/i915/gt/intel_context.c +++ b/drivers/gpu/drm/i915/gt/intel_context.c @@ -59,6 +59,10 @@ int __intel_context_do_pin(struct intel_context *ce) if (err) goto err; + GEM_TRACE("%s context:%llx pin ring:{head:%04x, tail:%04x}\n", + ce->engine->name, ce->ring->timeline->fence_context, + ce->ring->head, ce->ring->tail); + i915_gem_context_get(ce->gem_context); /* for ctx->ppgtt */ smp_mb__before_atomic(); /* flush pin before it is visible */ @@ -85,6 +89,9 @@ void intel_context_unpin(struct intel_context *ce) mutex_lock_nested(&ce->pin_mutex, SINGLE_DEPTH_NESTING); if (likely(atomic_dec_and_test(&ce->pin_count))) { + GEM_TRACE("%s context:%llx retire\n", + ce->engine->name, ce->ring->timeline->fence_context); + ce->ops->unpin(ce); i915_gem_context_put(ce->gem_context); @@ -127,6 +134,9 @@ static void __intel_context_retire(struct i915_active *active) { struct intel_context *ce = container_of(active, typeof(*ce), active); + GEM_TRACE("%s context:%llx retire\n", + ce->engine->name, ce->ring->timeline->fence_context); + if (ce->state) __context_unpin_state(ce->state); diff --git a/drivers/gpu/drm/i915/gt/intel_ringbuffer.c b/drivers/gpu/drm/i915/gt/intel_ringbuffer.c index f094406dcc56..81f9b0422e6a 100644 --- a/drivers/gpu/drm/i915/gt/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/gt/intel_ringbuffer.c @@ -1197,6 +1197,7 @@ int intel_ring_pin(struct intel_ring *ring) GEM_BUG_ON(ring->vaddr); ring->vaddr = addr; + GEM_TRACE("ring:%llx pin\n", ring->timeline->fence_context); return 0; err_ring: @@ -1223,6 +1224,8 @@ void intel_ring_unpin(struct intel_ring *ring) if (!atomic_dec_and_test(&ring->pin_count)) return; + GEM_TRACE("ring:%llx unpin\n", ring->timeline->fence_context); + /* Discard any unused bytes beyond that submitted to hw. */ intel_ring_reset(ring, ring->tail); -- 2.45.2