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path: root/drivers/gpu/drm/i915/gem/i915_gem_clflush.c
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Diffstat (limited to 'drivers/gpu/drm/i915/gem/i915_gem_clflush.c')
-rw-r--r--drivers/gpu/drm/i915/gem/i915_gem_clflush.c18
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_clflush.c b/drivers/gpu/drm/i915/gem/i915_gem_clflush.c
index f0435c6feb68..8a248003dfae 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_clflush.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_clflush.c
@@ -69,10 +69,16 @@ static struct clflush *clflush_work_create(struct drm_i915_gem_object *obj)
bool i915_gem_clflush_object(struct drm_i915_gem_object *obj,
unsigned int flags)
{
+ struct drm_i915_private *i915 = to_i915(obj->base.dev);
struct clflush *clflush;
assert_object_held(obj);
+ if (IS_DGFX(i915)) {
+ WARN_ON_ONCE(obj->cache_dirty);
+ return false;
+ }
+
/*
* Stolen memory is always coherent with the GPU as it is explicitly
* marked as wc by the system, or the system is cache-coherent.
@@ -105,16 +111,24 @@ bool i915_gem_clflush_object(struct drm_i915_gem_object *obj,
if (clflush) {
i915_sw_fence_await_reservation(&clflush->base.chain,
obj->base.resv, NULL, true,
- i915_fence_timeout(to_i915(obj->base.dev)),
+ i915_fence_timeout(i915),
I915_FENCE_GFP);
dma_resv_add_excl_fence(obj->base.resv, &clflush->base.dma);
dma_fence_work_commit(&clflush->base);
+ /*
+ * We must have successfully populated the pages(since we are
+ * holding a pin on the pages as per the flush worker) to reach
+ * this point, which must mean we have already done the required
+ * flush-on-acquire, hence resetting cache_dirty here should be
+ * safe.
+ */
+ obj->cache_dirty = false;
} else if (obj->mm.pages) {
__do_clflush(obj);
+ obj->cache_dirty = false;
} else {
GEM_BUG_ON(obj->write_domain != I915_GEM_DOMAIN_CPU);
}
- obj->cache_dirty = false;
return true;
}