[Intel-gfx] [PATCH 07/11] drm/i915/gem: Try allocating va from free space

From: Chris Wilson <chris@chris-wilson.co.uk>
To: intel-gfx@lists.freedesktop.org
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Subject: [Intel-gfx] [PATCH 07/11] drm/i915/gem: Try allocating va from free space
Date: Tue, 31 Mar 2020 22:31:04 +0100	[thread overview]
Message-ID: <20200331213108.11340-7-chris@chris-wilson.co.uk> (raw)
In-Reply-To: <20200331213108.11340-1-chris@chris-wilson.co.uk>

If the current node/entry location is occupied, and the object is not
pinned, try assigning it some free space. We cannot wait here, so if in
doubt, we unreserve and try to grab all at once.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index bc8aa9604787..d8c746108d85 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -446,8 +446,17 @@ eb_pin_vma(struct i915_execbuffer *eb,
 	if (unlikely(ev->flags & EXEC_OBJECT_NEEDS_GTT))
 		pin_flags |= PIN_GLOBAL;
 
-	if (unlikely(i915_vma_pin(vma, 0, 0, pin_flags)))
-		return false;
+	if (unlikely(i915_vma_pin(vma, 0, 0, pin_flags))) {
+		if (entry->flags & EXEC_OBJECT_PINNED)
+			return false;
+
+		pin_flags &= ~PIN_OFFSET_FIXED;
+		if (unlikely(i915_vma_pin(vma,
+					  entry->pad_to_size,
+					  entry->alignment,
+					  pin_flags)))
+			return false;
+	}
 
 	if (unlikely(ev->flags & EXEC_OBJECT_NEEDS_FENCE)) {
 		if (unlikely(i915_vma_pin_fence(vma))) {
-- 
2.20.1

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