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From: Chris Wilson <chris@chris-wilson.co.uk>
To: intel-gfx@lists.freedesktop.org
Cc: Dave Airlie <airlied@redhat.com>
Subject: [PATCH 14/29] drm: Introduce drm_mm_create_block()
Date: Sat, 11 Aug 2012 15:41:13 +0100
Message-ID: <1344696088-24760-15-git-send-email-chris@chris-wilson.co.uk> (raw)
In-Reply-To: <1344696088-24760-1-git-send-email-chris@chris-wilson.co.uk>

To be used later by i915 to preallocate exact blocks of space from the
range manager.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Dave Airlie <airlied@redhat.com>
---
 drivers/gpu/drm/drm_mm.c |   49 ++++++++++++++++++++++++++++++++++++++++++++++
 include/drm/drm_mm.h     |    4 ++++
 2 files changed, 53 insertions(+)

diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index 9bb82f7..5db8c20 100644
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -161,6 +161,55 @@ static void drm_mm_insert_helper(struct drm_mm_node *hole_node,
 	}
 }
 
+struct drm_mm_node *drm_mm_create_block(struct drm_mm *mm,
+					unsigned long start,
+					unsigned long size,
+					bool atomic)
+{
+	struct drm_mm_node *hole, *node;
+	unsigned long end = start + size;
+
+	list_for_each_entry(hole, &mm->hole_stack, hole_stack) {
+		unsigned long hole_start;
+		unsigned long hole_end;
+
+		BUG_ON(!hole->hole_follows);
+		hole_start = drm_mm_hole_node_start(hole);
+		hole_end = drm_mm_hole_node_end(hole);
+
+		if (hole_start > start || hole_end < end)
+			continue;
+
+		node = drm_mm_kmalloc(mm, atomic);
+		if (unlikely(node == NULL))
+			return NULL;
+
+		node->start = start;
+		node->size = size;
+		node->mm = mm;
+		node->allocated = 1;
+
+		INIT_LIST_HEAD(&node->hole_stack);
+		list_add(&node->node_list, &hole->node_list);
+
+		if (start == hole_start) {
+			hole->hole_follows = 0;
+			list_del_init(&hole->hole_stack);
+		}
+
+		node->hole_follows = 0;
+		if (end != hole_end) {
+			list_add(&node->hole_stack, &mm->hole_stack);
+			node->hole_follows = 1;
+		}
+
+		return node;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL(drm_mm_create_block);
+
 struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *hole_node,
 					     unsigned long size,
 					     unsigned alignment,
diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
index 06d7f79..4020f96 100644
--- a/include/drm/drm_mm.h
+++ b/include/drm/drm_mm.h
@@ -102,6 +102,10 @@ static inline bool drm_mm_initialized(struct drm_mm *mm)
 /*
  * Basic range manager support (drm_mm.c)
  */
+extern struct drm_mm_node *drm_mm_create_block(struct drm_mm *mm,
+					       unsigned long start,
+					       unsigned long size,
+					       bool atomic);
 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
 						    unsigned long size,
 						    unsigned alignment,
-- 
1.7.10.4

  parent reply index

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-08-11 14:40 Stolen pages, with a little surprise Chris Wilson
2012-08-11 14:41 ` [PATCH 01/29] drm/i915: Track unbound pages Chris Wilson
2012-08-20  9:00   ` [PATCH 1/2] drm/i915: move functions around Daniel Vetter
2012-08-20  9:00     ` [PATCH 2/2] drm/i915: Track unbound pages Daniel Vetter
2012-08-20  9:23       ` [PATCH] Add some sanity checks to unbound tracking Chris Wilson
2012-08-20  9:36       ` [PATCH 2/2] drm/i915: Track unbound pages Chris Wilson
2012-08-20  9:42         ` Daniel Vetter
2012-08-11 14:41 ` [PATCH 02/29] drm/i915: Show (count, size) of purgeable objects in i915_gem_objects Chris Wilson
2012-08-20  9:04   ` Daniel Vetter
2012-08-20  9:17     ` Chris Wilson
2012-08-11 14:41 ` [PATCH 03/29] drm/i915: Show pin count in debugfs Chris Wilson
2012-08-11 14:41 ` [PATCH 04/29] drm/i915: Try harder to allocate an mmap_offset Chris Wilson
2012-08-20  9:37   ` Daniel Vetter
2012-08-20 11:31     ` Chris Wilson
2012-08-11 14:41 ` [PATCH 05/29] drm/i915: Only pwrite through the GTT if there is space in the aperture Chris Wilson
2012-08-11 14:41 ` [PATCH 06/29] drm/i915: Protect private gem objects from truncate (such as imported dmabuf) Chris Wilson
2012-08-11 14:41 ` [PATCH 07/29] drm/i915: Extract general object init routine Chris Wilson
2012-08-24  0:05   ` Daniel Vetter
2012-08-11 14:41 ` [PATCH 08/29] drm/i915: Introduce drm_i915_gem_object_ops Chris Wilson
2012-08-20 19:35   ` Daniel Vetter
2012-08-11 14:41 ` [PATCH 09/29] drm/i915: Pin backing pages whilst exporting through a dmabuf vmap Chris Wilson
2012-08-11 14:41 ` [PATCH 10/29] drm/i915: Pin backing pages for pwrite Chris Wilson
2012-08-11 14:41 ` [PATCH 11/29] drm/i915: Pin backing pages for pread Chris Wilson
2012-08-11 14:41 ` [PATCH 12/29] drm/i915: Replace the array of pages with a scatterlist Chris Wilson
2012-08-11 14:41 ` [PATCH 13/29] drm/i915: Convert the dmabuf object to use the new i915_gem_object_ops Chris Wilson
2012-08-11 14:41 ` Chris Wilson [this message]
2012-08-11 14:41 ` [PATCH 15/29] drm/i915: Fix detection of stolen base for gen2 Chris Wilson
2012-08-11 14:41 ` [PATCH 16/29] drm/i915: Fix location of stolen memory register for SandyBridge+ Chris Wilson
2012-08-20 19:38   ` Daniel Vetter
2012-08-22 15:54     ` Chris Wilson
2012-08-11 14:41 ` [PATCH 17/29] drm/i915: Avoid clearing preallocated regions from the GTT Chris Wilson
2012-08-11 14:41 ` [PATCH 18/29] drm/i915: Delay allocation of stolen space for FBC Chris Wilson
2012-08-20 19:51   ` Daniel Vetter
2012-08-22 15:51     ` Chris Wilson
2012-08-11 14:41 ` [PATCH 19/29] drm/i915: Allow objects to be created with no backing pages, but stolen space Chris Wilson
2012-08-11 14:41 ` [PATCH 20/29] drm/i915: Differentiate between prime and stolen objects Chris Wilson
2012-08-11 14:41 ` [PATCH 21/29] drm/i915: Support readback of stolen objects upon error Chris Wilson
2012-08-11 14:41 ` [PATCH 22/29] drm/i915: Handle stolen objects in pwrite Chris Wilson
2012-08-20 19:56   ` Daniel Vetter
2012-08-22 15:47     ` Chris Wilson
2012-08-30 15:09     ` Chris Wilson
2012-08-11 14:41 ` [PATCH 23/29] drm/i915: Handle stolen objects for pread Chris Wilson
2012-08-11 14:41 ` [PATCH 24/29] drm/i915: Introduce i915_gem_object_create_stolen() Chris Wilson
2012-08-11 14:41 ` [PATCH 25/29] drm/i915: Allocate fbcon from stolen memory Chris Wilson
2012-08-11 14:41 ` [PATCH 26/29] drm/i915: Allocate ringbuffers " Chris Wilson
2012-08-11 14:41 ` [PATCH 27/29] drm/i915: Allocate overlay registers " Chris Wilson
2012-08-20 21:17   ` Daniel Vetter
2012-08-22 15:45     ` Chris Wilson
2012-08-22 16:26       ` Daniel Vetter
2012-08-11 14:41 ` [PATCH 28/29] drm/i915: Use a slab for object allocation Chris Wilson
2012-08-11 14:41 ` [PATCH 29/29] drm/i915: Introduce mapping of user pages into video memory (userptr) ioctl Chris Wilson

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