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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-07-01 17:23:14 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-07-01 20:42:31 +0100 |
| commit | 1f15b76f1ec973d1eb5d21b6d98b21aebb9025f1 (patch) | |
| tree | 004b9856181dabdc5a35dd8dade16c2336704a27 /drivers/gpu/drm/i915/i915_gem.c | |
| parent | 26a02b8fc35ff2c393505bccd9f046e8d50c1708 (diff) | |
| download | linux-1f15b76f1ec973d1eb5d21b6d98b21aebb9025f1.tar.gz | |
drm/i915: Separate GPU hang waitqueue from advance
Currently __i915_wait_request uses a per-engine wait_queue_t for the dual
purpose of waking after the GPU advances or for waking after an error.
In the future, we may add even more wake sources and require greater
separation, but for now we can conceptually simplify wakeups by separating
the two sources. In particular, this allows us to use different wait-queues
(e.g. one on the engine advancement, a global one for errors and one on
each requests) without any hassle.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1467390209-3576-5-git-send-email-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index e0b1e286bf87..b5278d117ea0 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1455,6 +1455,7 @@ int __i915_wait_request(struct drm_i915_gem_request *req, const bool irq_test_in_progress = ACCESS_ONCE(dev_priv->gpu_error.test_irq_rings) & intel_engine_flag(engine); int state = interruptible ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE; + DEFINE_WAIT(reset); DEFINE_WAIT(wait); unsigned long timeout_expire; s64 before = 0; /* Only to silence a compiler warning. */ @@ -1499,6 +1500,7 @@ int __i915_wait_request(struct drm_i915_gem_request *req, goto out; } + add_wait_queue(&dev_priv->gpu_error.wait_queue, &reset); for (;;) { struct timer_list timer; @@ -1557,6 +1559,8 @@ int __i915_wait_request(struct drm_i915_gem_request *req, destroy_timer_on_stack(&timer); } } + remove_wait_queue(&dev_priv->gpu_error.wait_queue, &reset); + if (!irq_test_in_progress) engine->irq_put(engine); @@ -5287,6 +5291,7 @@ i915_gem_load_init(struct drm_device *dev) i915_gem_retire_work_handler); INIT_DELAYED_WORK(&dev_priv->mm.idle_work, i915_gem_idle_work_handler); + init_waitqueue_head(&dev_priv->gpu_error.wait_queue); init_waitqueue_head(&dev_priv->gpu_error.reset_queue); dev_priv->relative_constants_mode = I915_EXEC_CONSTANTS_REL_GENERAL; |