blob: 3598c0fef8d5323fc642a9bd782f821ef672c91a [file] [log] [blame]
From 33e5df719f09299b26b5fda38445bc2463231c04 Mon Sep 17 00:00:00 2001
From: Ben Widawsky <benjamin.widawsky@intel.com>
Date: Tue, 24 Sep 2013 09:57:57 -0700
Subject: drm/i915: Provide a cheap ggtt vma lookup
"We do fairly often lookup the ggtt vma for an obj." - Chris Wilson. As
such, provide a function to offer slightly cheaper access to the vma.
Not performance tested. By my quick estimation it saves at least 3
pointer dereferences from the existing mechanism.
This patch mostly matches code from Chris in
<20130911221430.GB7825@nuc-i3427.alporthouse.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 5c2abbeab798154166d42fce4f71790caa6dd9bc)
Signed-off-by: James Ausmus <james.ausmus@intel.com>
Conflicts:
drivers/gpu/drm/i915/i915_gem.c
(context changes due to not bringing in the shrinker API
changes)
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 4 +++-
drivers/gpu/drm/i915/i915_gem.c | 17 +++++++++++++++--
2 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 662c0ff0b049..a3d43b25e1d9 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2030,6 +2030,9 @@ struct i915_vma *i915_gem_obj_to_vma(struct drm_i915_gem_object *obj,
struct i915_vma *
i915_gem_obj_lookup_or_create_vma(struct drm_i915_gem_object *obj,
struct i915_address_space *vm);
+
+struct i915_vma *i915_gem_obj_to_ggtt(struct drm_i915_gem_object *obj);
+
/* Some GGTT VM helpers */
#define obj_to_ggtt(obj) \
(&((struct drm_i915_private *)(obj)->base.dev->dev_private)->gtt.base)
@@ -2066,7 +2069,6 @@ i915_gem_obj_ggtt_pin(struct drm_i915_gem_object *obj,
return i915_gem_object_pin(obj, obj_to_ggtt(obj), alignment,
map_and_fenceable, nonblocking);
}
-#undef obj_to_ggtt
/* i915_gem_context.c */
void i915_gem_context_init(struct drm_device *dev);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 845072412ea7..6b134f08c93e 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3403,8 +3403,7 @@ i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write)
/* And bump the LRU for this access */
if (i915_gem_object_is_inactive(obj)) {
- struct i915_vma *vma = i915_gem_obj_to_vma(obj,
- &dev_priv->gtt.base);
+ struct i915_vma *vma = i915_gem_obj_to_ggtt(obj);
if (vma)
list_move_tail(&vma->mm_list,
&dev_priv->gtt.base.inactive_list);
@@ -4940,3 +4939,17 @@ unsigned long i915_gem_obj_size(struct drm_i915_gem_object *o,
return 0;
}
+
+struct i915_vma *i915_gem_obj_to_ggtt(struct drm_i915_gem_object *obj)
+{
+ struct i915_vma *vma;
+
+ if (WARN_ON(list_empty(&obj->vma_list)))
+ return NULL;
+
+ vma = list_first_entry(&obj->vma_list, typeof(*vma), vma_link);
+ if (WARN_ON(vma->vm != obj_to_ggtt(obj)))
+ return NULL;
+
+ return vma;
+}
--
1.8.5.rc3