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drm/i915: Allow contexts to be unreferenced locklessly

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If we move the actual cleanup of the context to a worker, we can allow
the final free to be called from any context and avoid undue latency in
the caller.

v2: Negotiate handling the delayed contexts free by flushing the
workqueue before calling i915_gem_context_fini() and performing the final
free of the kernel context directly
v3: Flush deferred frees before new context allocations

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170620110547.15947-2-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2017-06-20 12:05:46 +01:00
parent 829a0af29f
commit 5f09a9c8ab
10 changed files with 88 additions and 39 deletions
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2
drivers/gpu/drm/i915/i915_drv.c
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@@ -585,6 +585,8 @@ static const struct vga_switcheroo_client_ops i915_switcheroo_ops = {
static void i915_gem_fini(struct drm_i915_private *dev_priv)
{
flush_workqueue(dev_priv->wq);
mutex_lock(&dev_priv->drm.struct_mutex);
intel_uc_fini_hw(dev_priv);
i915_gem_cleanup_engines(dev_priv);