diff options
author | Chris Wilson <chris@chris-wilson.co.uk> | 2018-04-30 14:15:03 +0100 |
---|---|---|
committer | Chris Wilson <chris@chris-wilson.co.uk> | 2018-04-30 16:01:20 +0100 |
commit | 643b450a594e9cb57fbd2534d1571d244faddd01 (patch) | |
tree | 161ad01d63b4126d339ac70f10149e9c07638b3e | |
parent | b887d61546245389c0304d8b1371bab9af8106c2 (diff) | |
download | linux-stable-643b450a594e9cb57fbd2534d1571d244faddd01.tar.gz linux-stable-643b450a594e9cb57fbd2534d1571d244faddd01.tar.bz2 linux-stable-643b450a594e9cb57fbd2534d1571d244faddd01.zip |
drm/i915: Only track live rings for retiring
We don't need to track every ring for its lifetime as they are managed
by the contexts/engines. What we do want to track are the live rings so
that we can sporadically clean up requests if userspace falls behind. We
can simply restrict the gt->rings list to being only gt->live_rings.
v2: s/live/active/ for consistency with gt.active_requests
Suggested-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180430131503.5375-4-chris@chris-wilson.co.uk
-rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 3 | ||||
-rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 6 | ||||
-rw-r--r-- | drivers/gpu/drm/i915/i915_request.c | 10 | ||||
-rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.c | 4 | ||||
-rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.h | 2 | ||||
-rw-r--r-- | drivers/gpu/drm/i915/selftests/mock_engine.c | 4 | ||||
-rw-r--r-- | drivers/gpu/drm/i915/selftests/mock_gem_device.c | 5 |
7 files changed, 18 insertions, 16 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index edc33e059191..6268a5103dba 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -2061,7 +2061,8 @@ struct drm_i915_private { struct i915_gem_timeline global_timeline; struct list_head timelines; - struct list_head rings; + + struct list_head active_rings; u32 active_requests; u32 request_serial; diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index f0644d1fbd75..fa1d94a4eb5f 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -141,6 +141,7 @@ static u32 __i915_gem_park(struct drm_i915_private *i915) { lockdep_assert_held(&i915->drm.struct_mutex); GEM_BUG_ON(i915->gt.active_requests); + GEM_BUG_ON(!list_empty(&i915->gt.active_rings)); if (!i915->gt.awake) return I915_EPOCH_INVALID; @@ -5599,9 +5600,10 @@ int i915_gem_init_early(struct drm_i915_private *dev_priv) if (!dev_priv->priorities) goto err_dependencies; - mutex_lock(&dev_priv->drm.struct_mutex); - INIT_LIST_HEAD(&dev_priv->gt.rings); INIT_LIST_HEAD(&dev_priv->gt.timelines); + INIT_LIST_HEAD(&dev_priv->gt.active_rings); + + mutex_lock(&dev_priv->drm.struct_mutex); err = i915_gem_timeline_init__global(dev_priv); mutex_unlock(&dev_priv->drm.struct_mutex); if (err) diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c index e6535255d445..c8fc4b323e62 100644 --- a/drivers/gpu/drm/i915/i915_request.c +++ b/drivers/gpu/drm/i915/i915_request.c @@ -322,6 +322,7 @@ static void advance_ring(struct i915_request *request) * noops - they are safe to be replayed on a reset. */ tail = READ_ONCE(request->tail); + list_del(&ring->active_link); } else { tail = request->postfix; } @@ -1096,6 +1097,8 @@ void __i915_request_add(struct i915_request *request, bool flush_caches) i915_gem_active_set(&timeline->last_request, request); list_add_tail(&request->ring_link, &ring->request_list); + if (list_is_first(&request->ring_link, &ring->request_list)) + list_add(&ring->active_link, &request->i915->gt.active_rings); request->emitted_jiffies = jiffies; /* @@ -1418,14 +1421,17 @@ static void ring_retire_requests(struct intel_ring *ring) void i915_retire_requests(struct drm_i915_private *i915) { - struct intel_ring *ring, *next; + struct intel_ring *ring, *tmp; lockdep_assert_held(&i915->drm.struct_mutex); if (!i915->gt.active_requests) return; - list_for_each_entry_safe(ring, next, &i915->gt.rings, link) + /* An outstanding request must be on a still active ring somewhere */ + GEM_BUG_ON(list_empty(&i915->gt.active_rings)); + + list_for_each_entry_safe(ring, tmp, &i915->gt.active_rings, active_link) ring_retire_requests(ring); } diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index ae8958007df5..007449cfa22b 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -1150,8 +1150,6 @@ intel_engine_create_ring(struct intel_engine_cs *engine, int size) } ring->vma = vma; - list_add(&ring->link, &engine->i915->gt.rings); - return ring; } @@ -1163,8 +1161,6 @@ intel_ring_free(struct intel_ring *ring) i915_vma_close(ring->vma); __i915_gem_object_release_unless_active(obj); - list_del(&ring->link); - kfree(ring); } diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index deb80d01e0bd..fd679cec9ac6 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -130,7 +130,7 @@ struct intel_ring { void *vaddr; struct list_head request_list; - struct list_head link; + struct list_head active_link; u32 head; u32 tail; diff --git a/drivers/gpu/drm/i915/selftests/mock_engine.c b/drivers/gpu/drm/i915/selftests/mock_engine.c index d95fc481e5c1..19175ddcb45b 100644 --- a/drivers/gpu/drm/i915/selftests/mock_engine.c +++ b/drivers/gpu/drm/i915/selftests/mock_engine.c @@ -147,15 +147,11 @@ static struct intel_ring *mock_ring(struct intel_engine_cs *engine) INIT_LIST_HEAD(&ring->request_list); intel_ring_update_space(ring); - list_add(&ring->link, &engine->i915->gt.rings); - return ring; } static void mock_ring_free(struct intel_ring *ring) { - list_del(&ring->link); - kfree(ring); } diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c index ac4bacf8b5b9..f22a2b35a283 100644 --- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c +++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c @@ -224,9 +224,10 @@ struct drm_i915_private *mock_gem_device(void) if (!i915->priorities) goto err_dependencies; - mutex_lock(&i915->drm.struct_mutex); - INIT_LIST_HEAD(&i915->gt.rings); INIT_LIST_HEAD(&i915->gt.timelines); + INIT_LIST_HEAD(&i915->gt.active_rings); + + mutex_lock(&i915->drm.struct_mutex); err = i915_gem_timeline_init__global(i915); if (err) { mutex_unlock(&i915->drm.struct_mutex); |