Revert "Merge branch 'drm-gem'"

This reverts commit 53675e5c05c0598b7ea206d5c27dbcae786a2c03.

Conflicts:

	src/mesa/drivers/dri/i965/brw_wm_surface_state.c

4 files changed, 1692 insertions, 33 deletions

diff --git a/src/mesa/drivers/dri/common/dri_bufmgr.c b/src/mesa/drivers/dri/common/dri_bufmgr.c
new file mode 100644
index 00000000000..8b5cb7628ed
--- /dev/null
+++ b/src/mesa/drivers/dri/common/dri_bufmgr.c
@@ -0,0 +1,160 @@
+/*
+ * Copyright © 2007 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <[email protected]>
+ *
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <assert.h>
+#include "mtypes.h"
+#include "dri_bufmgr.h"
+
+/** @file dri_bufmgr.c
+ *
+ * Convenience functions for buffer management methods.
+ */
+
+dri_bo *
+dri_bo_alloc(dri_bufmgr *bufmgr, const char *name, unsigned long size,
+	     unsigned int alignment, uint64_t location_mask)
+{
+   return bufmgr->bo_alloc(bufmgr, name, size, alignment, location_mask);
+}
+
+dri_bo *
+dri_bo_alloc_static(dri_bufmgr *bufmgr, const char *name, unsigned long offset,
+		    unsigned long size, void *virtual,
+		    uint64_t location_mask)
+{
+   return bufmgr->bo_alloc_static(bufmgr, name, offset, size, virtual,
+				  location_mask);
+}
+
+void
+dri_bo_reference(dri_bo *bo)
+{
+   bo->bufmgr->bo_reference(bo);
+}
+
+void
+dri_bo_unreference(dri_bo *bo)
+{
+   if (bo == NULL)
+      return;
+
+   bo->bufmgr->bo_unreference(bo);
+}
+
+int
+dri_bo_map(dri_bo *buf, GLboolean write_enable)
+{
+   return buf->bufmgr->bo_map(buf, write_enable);
+}
+
+int
+dri_bo_unmap(dri_bo *buf)
+{
+   return buf->bufmgr->bo_unmap(buf);
+}
+
+void
+dri_fence_wait(dri_fence *fence)
+{
+   fence->bufmgr->fence_wait(fence);
+}
+
+void
+dri_fence_reference(dri_fence *fence)
+{
+   fence->bufmgr->fence_reference(fence);
+}
+
+void
+dri_fence_unreference(dri_fence *fence)
+{
+   if (fence == NULL)
+      return;
+
+   fence->bufmgr->fence_unreference(fence);
+}
+
+void
+dri_bo_subdata(dri_bo *bo, unsigned long offset,
+	       unsigned long size, const void *data)
+{
+   if (size == 0 || data == NULL)
+      return;
+
+   dri_bo_map(bo, GL_TRUE);
+   memcpy((unsigned char *)bo->virtual + offset, data, size);
+   dri_bo_unmap(bo);
+}
+
+void
+dri_bo_get_subdata(dri_bo *bo, unsigned long offset,
+		   unsigned long size, void *data)
+{
+   if (size == 0 || data == NULL)
+      return;
+
+   dri_bo_map(bo, GL_FALSE);
+   memcpy(data, (unsigned char *)bo->virtual + offset, size);
+   dri_bo_unmap(bo);
+}
+
+void
+dri_bufmgr_destroy(dri_bufmgr *bufmgr)
+{
+   bufmgr->destroy(bufmgr);
+}
+
+
+int dri_emit_reloc(dri_bo *reloc_buf, uint64_t flags, GLuint delta,
+		    GLuint offset, dri_bo *target_buf)
+{
+   return reloc_buf->bufmgr->emit_reloc(reloc_buf, flags, delta, offset, target_buf);
+}
+
+void *dri_process_relocs(dri_bo *batch_buf, GLuint *count)
+{
+   return batch_buf->bufmgr->process_relocs(batch_buf, count);
+}
+
+void dri_post_submit(dri_bo *batch_buf, dri_fence **last_fence)
+{
+   batch_buf->bufmgr->post_submit(batch_buf, last_fence);
+}
+
+void
+dri_bufmgr_set_debug(dri_bufmgr *bufmgr, GLboolean enable_debug)
+{
+   bufmgr->debug = enable_debug;
+}
+
+int
+dri_bufmgr_check_aperture_space(dri_bo *bo)
+{
+    return bo->bufmgr->check_aperture_space(bo);
+}
diff --git a/src/mesa/drivers/dri/common/dri_bufmgr.h b/src/mesa/drivers/dri/common/dri_bufmgr.h
new file mode 100644
index 00000000000..0a726dc108a
--- /dev/null
+++ b/src/mesa/drivers/dri/common/dri_bufmgr.h
@@ -0,0 +1,260 @@
+/**************************************************************************
+ * 
+ * Copyright � 2007 Intel Corporation
+ * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * 
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstr�m <thomas-at-tungstengraphics-dot-com>
+ *          Keith Whitwell <keithw-at-tungstengraphics-dot-com>
+ *	    Eric Anholt <[email protected]>
+ */
+
+#ifndef _DRI_BUFMGR_H_
+#define _DRI_BUFMGR_H_
+#include <xf86drm.h>
+
+typedef struct _dri_bufmgr dri_bufmgr;
+typedef struct _dri_bo dri_bo;
+typedef struct _dri_fence dri_fence;
+
+struct _dri_bo {
+   /** Size in bytes of the buffer object. */
+   unsigned long size;
+   /**
+    * Card virtual address (offset from the beginning of the aperture) for the
+    * object.  Only valid while validated.
+    */
+   unsigned long offset;
+   /**
+    * Virtual address for accessing the buffer data.  Only valid while mapped.
+    */
+   void *virtual;
+   /** Buffer manager context associated with this buffer object */
+   dri_bufmgr *bufmgr;
+};
+
+struct _dri_fence {
+   /**
+    * This is an ORed mask of DRM_BO_FLAG_READ, DRM_BO_FLAG_WRITE, and
+    * DRM_FLAG_EXE indicating the operations associated with this fence.
+    *
+    * It is constant for the life of the fence object.
+    */
+   unsigned int type;
+   /** Buffer manager context associated with this fence */
+   dri_bufmgr *bufmgr;
+};
+
+/**
+ * Context for a buffer manager instance.
+ *
+ * Contains public methods followed by private storage for the buffer manager.
+ */
+struct _dri_bufmgr {
+   /**
+    * Allocate a buffer object.
+    *
+    * Buffer objects are not necessarily initially mapped into CPU virtual
+    * address space or graphics device aperture.  They must be mapped using
+    * bo_map() to be used by the CPU, and validated for use using bo_validate()
+    * to be used from the graphics device.
+    */
+   dri_bo *(*bo_alloc)(dri_bufmgr *bufmgr_ctx, const char *name,
+		       unsigned long size, unsigned int alignment,
+		       uint64_t location_mask);
+
+   /**
+    * Allocates a buffer object for a static allocation.
+    *
+    * Static allocations are ones such as the front buffer that are offered by
+    * the X Server, which are never evicted and never moved.
+    */
+   dri_bo *(*bo_alloc_static)(dri_bufmgr *bufmgr_ctx, const char *name,
+			      unsigned long offset, unsigned long size,
+			      void *virtual, uint64_t location_mask);
+
+   /** Takes a reference on a buffer object */
+   void (*bo_reference)(dri_bo *bo);
+
+   /**
+    * Releases a reference on a buffer object, freeing the data if
+    * rerefences remain.
+    */
+   void (*bo_unreference)(dri_bo *bo);
+
+   /**
+    * Maps the buffer into userspace.
+    *
+    * This function will block waiting for any existing fence on the buffer to
+    * clear, first.  The resulting mapping is available at buf->virtual.
+\    */
+   int (*bo_map)(dri_bo *buf, GLboolean write_enable);
+
+   /** Reduces the refcount on the userspace mapping of the buffer object. */
+   int (*bo_unmap)(dri_bo *buf);
+
+   /** Takes a reference on a fence object */
+   void (*fence_reference)(dri_fence *fence);
+
+   /**
+    * Releases a reference on a fence object, freeing the data if
+    * rerefences remain.
+    */
+   void (*fence_unreference)(dri_fence *fence);
+
+   /**
+    * Blocks until the given fence is signaled.
+    */
+   void (*fence_wait)(dri_fence *fence);
+
+   /**
+    * Tears down the buffer manager instance.
+    */
+   void (*destroy)(dri_bufmgr *bufmgr);
+
+   /**
+    * Add relocation entry in reloc_buf, which will be updated with the
+    * target buffer's real offset on on command submission.
+    *
+    * Relocations remain in place for the lifetime of the buffer object.
+    *
+    * \param reloc_buf Buffer to write the relocation into.
+    * \param flags BO flags to be used in validating the target buffer.
+    *	     Applicable flags include:
+    *	     - DRM_BO_FLAG_READ: The buffer will be read in the process of
+    *	       command execution.
+    *	     - DRM_BO_FLAG_WRITE: The buffer will be written in the process of
+    *	       command execution.
+    *	     - DRM_BO_FLAG_MEM_TT: The buffer should be validated in TT memory.
+    *	     - DRM_BO_FLAG_MEM_VRAM: The buffer should be validated in video
+    *	       memory.
+    * \param delta Constant value to be added to the relocation target's offset.
+    * \param offset Byte offset within batch_buf of the relocated pointer.
+    * \param target Buffer whose offset should be written into the relocation
+    *	     entry.
+    */
+   int (*emit_reloc)(dri_bo *reloc_buf, uint64_t flags, GLuint delta,
+		      GLuint offset, dri_bo *target);
+
+   /**
+    * Processes the relocations, either in userland or by converting the list
+    * for use in batchbuffer submission.
+    *
+    * Kernel-based implementations will return a pointer to the arguments
+    * to be handed with batchbuffer submission to the kernel.  The userland
+    * implementation performs the buffer validation and emits relocations
+    * into them the appopriate order.
+    *
+    * \param batch_buf buffer at the root of the tree of relocations
+    * \param count returns the number of buffers validated.
+    * \return relocation record for use in command submission.
+    * */
+   void *(*process_relocs)(dri_bo *batch_buf, GLuint *count);
+
+   void (*post_submit)(dri_bo *batch_buf, dri_fence **fence);
+
+   int (*check_aperture_space)(dri_bo *bo);
+   GLboolean debug; /**< Enables verbose debugging printouts */
+};
+
+dri_bo *dri_bo_alloc(dri_bufmgr *bufmgr, const char *name, unsigned long size,
+		     unsigned int alignment, uint64_t location_mask);
+dri_bo *dri_bo_alloc_static(dri_bufmgr *bufmgr, const char *name,
+			    unsigned long offset, unsigned long size,
+			    void *virtual, uint64_t location_mask);
+void dri_bo_reference(dri_bo *bo);
+void dri_bo_unreference(dri_bo *bo);
+int dri_bo_map(dri_bo *buf, GLboolean write_enable);
+int dri_bo_unmap(dri_bo *buf);
+void dri_fence_wait(dri_fence *fence);
+void dri_fence_reference(dri_fence *fence);
+void dri_fence_unreference(dri_fence *fence);
+
+void dri_bo_subdata(dri_bo *bo, unsigned long offset,
+		    unsigned long size, const void *data);
+void dri_bo_get_subdata(dri_bo *bo, unsigned long offset,
+			unsigned long size, void *data);
+
+void dri_bufmgr_fake_contended_lock_take(dri_bufmgr *bufmgr);
+dri_bufmgr *dri_bufmgr_fake_init(unsigned long low_offset, void *low_virtual,
+				 unsigned long size,
+				 unsigned int (*fence_emit)(void *private),
+				 int (*fence_wait)(void *private,
+						   unsigned int cookie),
+				 void *driver_priv);
+void dri_bufmgr_set_debug(dri_bufmgr *bufmgr, GLboolean enable_debug);
+void dri_bo_fake_disable_backing_store(dri_bo *bo,
+				       void (*invalidate_cb)(dri_bo *bo,
+							     void *ptr),
+				       void *ptr);
+void dri_bufmgr_destroy(dri_bufmgr *bufmgr);
+
+int dri_emit_reloc(dri_bo *reloc_buf, uint64_t flags, GLuint delta,
+		   GLuint offset, dri_bo *target_buf);
+void *dri_process_relocs(dri_bo *batch_buf, uint32_t *count);
+void dri_post_process_relocs(dri_bo *batch_buf);
+void dri_post_submit(dri_bo *batch_buf, dri_fence **last_fence);
+int dri_bufmgr_check_aperture_space(dri_bo *bo);
+
+#ifndef TTM_API
+/* reuse some TTM API */
+
+#define DRM_BO_MEM_LOCAL 0
+#define DRM_BO_MEM_TT 1
+#define DRM_BO_MEM_VRAM 2
+#define DRM_BO_MEM_PRIV0 3
+#define DRM_BO_MEM_PRIV1 4
+#define DRM_BO_MEM_PRIV2 5
+#define DRM_BO_MEM_PRIV3 6
+#define DRM_BO_MEM_PRIV4 7
+
+#define DRM_BO_FLAG_READ        (1ULL << 0)
+#define DRM_BO_FLAG_WRITE       (1ULL << 1)
+#define DRM_BO_FLAG_EXE         (1ULL << 2)
+#define DRM_BO_MASK_ACCESS	(DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE | DRM_BO_FLAG_EXE)
+#define DRM_BO_FLAG_NO_EVICT    (1ULL << 4)
+
+#define DRM_BO_FLAG_MAPPABLE    (1ULL << 5)
+#define DRM_BO_FLAG_SHAREABLE   (1ULL << 6)
+
+#define DRM_BO_FLAG_CACHED      (1ULL << 7)
+
+#define DRM_BO_FLAG_NO_MOVE     (1ULL << 8)
+#define DRM_BO_FLAG_CACHED_MAPPED    (1ULL << 19)
+#define DRM_BO_FLAG_FORCE_CACHING  (1ULL << 13)
+#define DRM_BO_FLAG_FORCE_MAPPABLE (1ULL << 14)
+#define DRM_BO_FLAG_TILE           (1ULL << 15)
+
+#define DRM_BO_FLAG_MEM_LOCAL  (1ULL << 24)
+#define DRM_BO_FLAG_MEM_TT     (1ULL << 25)
+#define DRM_BO_FLAG_MEM_VRAM   (1ULL << 26)
+
+#define DRM_BO_MASK_MEM         0x00000000FF000000ULL
+
+#define DRM_FENCE_TYPE_EXE                 0x00000001
+#endif
+
+#endif
diff --git a/src/mesa/drivers/dri/common/dri_bufmgr_fake.c b/src/mesa/drivers/dri/common/dri_bufmgr_fake.c
new file mode 100644
index 00000000000..9bf3f3437ce
--- /dev/null
+++ b/src/mesa/drivers/dri/common/dri_bufmgr_fake.c
@@ -0,0 +1,1245 @@
+/**************************************************************************
+ * 
+ * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+/* Originally a fake version of the buffer manager so that we can
+ * prototype the changes in a driver fairly quickly, has been fleshed
+ * out to a fully functional interim solution.
+ *
+ * Basically wraps the old style memory management in the new
+ * programming interface, but is more expressive and avoids many of
+ * the bugs in the old texture manager.
+ */
+#include "mtypes.h"
+#include "dri_bufmgr.h"
+#include "drm.h"
+
+#include "simple_list.h"
+#include "mm.h"
+#include "imports.h"
+
+#define DBG(...) do {					\
+   if (bufmgr_fake->bufmgr.debug)			\
+      _mesa_printf(__VA_ARGS__);			\
+} while (0)
+
+/* Internal flags:
+ */
+#define BM_NO_BACKING_STORE			0x00000001
+#define BM_NO_FENCE_SUBDATA			0x00000002
+#define BM_PINNED				0x00000004
+
+/* Wrapper around mm.c's mem_block, which understands that you must
+ * wait for fences to expire before memory can be freed.  This is
+ * specific to our use of memcpy for uploads - an upload that was
+ * processed through the command queue wouldn't need to care about
+ * fences.
+ */
+#define MAX_RELOCS 4096
+
+struct fake_buffer_reloc
+{
+   /** Buffer object that the relocation points at. */
+   dri_bo *target_buf;
+   /** Offset of the relocation entry within reloc_buf. */
+   GLuint offset;
+   /** Cached value of the offset when we last performed this relocation. */
+   GLuint last_target_offset;
+   /** Value added to target_buf's offset to get the relocation entry. */
+   GLuint delta;
+   /** Flags to validate the target buffer under. */
+   uint64_t validate_flags;
+};
+
+struct block {
+   struct block *next, *prev;
+   struct mem_block *mem;	/* BM_MEM_AGP */
+
+   /**
+    * Marks that the block is currently in the aperture and has yet to be
+    * fenced.
+    */
+   unsigned on_hardware:1;
+   /**
+    * Marks that the block is currently fenced (being used by rendering) and
+    * can't be freed until @fence is passed.
+    */
+   unsigned fenced:1;
+
+   /** Fence cookie for the block. */
+   unsigned fence; /* Split to read_fence, write_fence */
+
+   dri_bo *bo;
+   void *virtual;
+};
+
+typedef struct _bufmgr_fake {
+   dri_bufmgr bufmgr;
+
+   unsigned long low_offset;
+   unsigned long size;
+   void *virtual;
+
+   struct mem_block *heap;
+   struct block lru;		/* only allocated, non-fence-pending blocks here */
+
+   unsigned buf_nr;		/* for generating ids */
+
+   struct block on_hardware;	/* after bmValidateBuffers */
+   struct block fenced;		/* after bmFenceBuffers (mi_flush, emit irq, write dword) */
+                                /* then to bufmgr->lru or free() */
+
+   unsigned int last_fence;
+
+   unsigned fail:1;
+   unsigned need_fence:1;
+   GLboolean thrashing;
+
+   /**
+    * Driver callback to emit a fence, returning the cookie.
+    *
+    * Currently, this also requires that a write flush be emitted before
+    * emitting the fence, but this should change.
+    */
+   unsigned int (*fence_emit)(void *private);
+   /** Driver callback to wait for a fence cookie to have passed. */
+   int (*fence_wait)(void *private, unsigned int fence_cookie);
+   /** Driver-supplied argument to driver callbacks */
+   void *driver_priv;
+
+   GLboolean debug;
+
+   GLboolean performed_rendering;
+
+   /* keep track of the current total size of objects we have relocs for */
+   unsigned long current_total_size;
+} dri_bufmgr_fake;
+
+typedef struct _dri_bo_fake {
+   dri_bo bo;
+
+   unsigned id;			/* debug only */
+   const char *name;
+
+   unsigned dirty:1;
+   unsigned size_accounted:1; /*this buffers size has been accounted against the aperture */
+   unsigned card_dirty:1; /* has the card written to this buffer - we make need to copy it back */
+   unsigned int refcount;
+   /* Flags may consist of any of the DRM_BO flags, plus
+    * DRM_BO_NO_BACKING_STORE and BM_NO_FENCE_SUBDATA, which are the first two
+    * driver private flags.
+    */
+   uint64_t flags;
+   unsigned int alignment;
+   GLboolean is_static, validated;
+   unsigned int map_count;
+
+   /* Flags for the buffer to be validated with in command submission */
+   uint64_t validate_flags;
+
+   /** relocation list */
+   struct fake_buffer_reloc *relocs;
+   GLuint nr_relocs;
+
+   struct block *block;
+   void *backing_store;
+   void (*invalidate_cb)(dri_bo *bo, void *ptr);
+   void *invalidate_ptr;
+} dri_bo_fake;
+
+typedef struct _dri_fence_fake {
+   dri_fence fence;
+
+   const char *name;
+   unsigned int refcount;
+   unsigned int fence_cookie;
+   GLboolean flushed;
+} dri_fence_fake;
+
+static int clear_fenced(dri_bufmgr_fake *bufmgr_fake,
+			unsigned int fence_cookie);
+
+static int dri_fake_check_aperture_space(dri_bo *bo);
+
+#define MAXFENCE 0x7fffffff
+
+static GLboolean FENCE_LTE( unsigned a, unsigned b )
+{
+   if (a == b)
+      return GL_TRUE;
+
+   if (a < b && b - a < (1<<24))
+      return GL_TRUE;
+
+   if (a > b && MAXFENCE - a + b < (1<<24))
+      return GL_TRUE;
+
+   return GL_FALSE;
+}
+
+static unsigned int
+_fence_emit_internal(dri_bufmgr_fake *bufmgr_fake)
+{
+   bufmgr_fake->last_fence = bufmgr_fake->fence_emit(bufmgr_fake->driver_priv);
+   return bufmgr_fake->last_fence;
+}
+
+static void
+_fence_wait_internal(dri_bufmgr_fake *bufmgr_fake, unsigned int cookie)
+{
+   int ret;
+
+   ret = bufmgr_fake->fence_wait(bufmgr_fake->driver_priv, cookie);
+   if (ret != 0) {
+      _mesa_printf("%s:%d: Error %d waiting for fence.\n",
+		   __FILE__, __LINE__);
+      abort();
+   }
+   clear_fenced(bufmgr_fake, cookie);
+}
+
+static GLboolean
+_fence_test(dri_bufmgr_fake *bufmgr_fake, unsigned fence)
+{
+   /* Slight problem with wrap-around:
+    */
+   return fence == 0 || FENCE_LTE(fence, bufmgr_fake->last_fence);
+}
+
+/**
+ * Allocate a memory manager block for the buffer.
+ */
+static GLboolean
+alloc_block(dri_bo *bo)
+{
+   dri_bo_fake *bo_fake = (dri_bo_fake *)bo;
+   dri_bufmgr_fake *bufmgr_fake= (dri_bufmgr_fake *)bo->bufmgr;
+   struct block *block = (struct block *)calloc(sizeof *block, 1);
+   unsigned int align_log2 = _mesa_ffs(bo_fake->alignment) - 1;
+   GLuint sz;
+
+   if (!block)
+      return GL_FALSE;
+
+   sz = (bo->size + bo_fake->alignment - 1) & ~(bo_fake->alignment - 1);
+
+   block->mem = mmAllocMem(bufmgr_fake->heap, sz, align_log2, 0);
+   if (!block->mem) {
+      free(block);
+      return GL_FALSE;
+   }
+
+   make_empty_list(block);
+
+   /* Insert at head or at tail???   
+    */
+   insert_at_tail(&bufmgr_fake->lru, block);
+
+   block->virtual = bufmgr_fake->virtual +
+      block->mem->ofs - bufmgr_fake->low_offset;
+   block->bo = bo;
+
+   bo_fake->block = block;
+
+   return GL_TRUE;
+}
+
+/* Release the card storage associated with buf:
+ */
+static void free_block(dri_bufmgr_fake *bufmgr_fake, struct block *block)
+{
+   dri_bo_fake *bo_fake;
+   DBG("free block %p %08x %d %d\n", block, block->mem->ofs, block->on_hardware, block->fenced);
+
+   if (!block)
+      return;
+
+   bo_fake = (dri_bo_fake *)block->bo;
+   if (!(bo_fake->flags & BM_NO_BACKING_STORE) && (bo_fake->card_dirty == 1)) {
+     memcpy(bo_fake->backing_store, block->virtual, block->bo->size);
+     bo_fake->card_dirty = 1;
+     bo_fake->dirty = 1;
+   }
+
+   if (block->on_hardware) {
+      block->bo = NULL;
+   }
+   else if (block->fenced) {
+      block->bo = NULL;
+   }
+   else {
+      DBG("    - free immediately\n");
+      remove_from_list(block);
+
+      mmFreeMem(block->mem);
+      free(block);
+   }
+}
+
+static void
+alloc_backing_store(dri_bo *bo)
+{
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)bo->bufmgr;
+   dri_bo_fake *bo_fake = (dri_bo_fake *)bo;
+   assert(!bo_fake->backing_store);
+   assert(!(bo_fake->flags & (BM_PINNED|BM_NO_BACKING_STORE)));
+
+   bo_fake->backing_store = ALIGN_MALLOC(bo->size, 64);
+
+   DBG("alloc_backing - buf %d %p %d\n", bo_fake->id, bo_fake->backing_store, bo->size);
+   assert(bo_fake->backing_store);
+}
+
+static void
+free_backing_store(dri_bo *bo)
+{
+   dri_bo_fake *bo_fake = (dri_bo_fake *)bo;
+
+   if (bo_fake->backing_store) {
+      assert(!(bo_fake->flags & (BM_PINNED|BM_NO_BACKING_STORE)));
+      ALIGN_FREE(bo_fake->backing_store);
+      bo_fake->backing_store = NULL;
+   }
+}
+
+static void
+set_dirty(dri_bo *bo)
+{
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)bo->bufmgr;
+   dri_bo_fake *bo_fake = (dri_bo_fake *)bo;
+
+   if (bo_fake->flags & BM_NO_BACKING_STORE && bo_fake->invalidate_cb != NULL)
+      bo_fake->invalidate_cb(bo, bo_fake->invalidate_ptr);
+
+   assert(!(bo_fake->flags & BM_PINNED));
+
+   DBG("set_dirty - buf %d\n", bo_fake->id);
+   bo_fake->dirty = 1;
+}
+
+static GLboolean
+evict_lru(dri_bufmgr_fake *bufmgr_fake, GLuint max_fence)
+{
+   struct block *block, *tmp;
+
+   DBG("%s\n", __FUNCTION__);
+
+   foreach_s(block, tmp, &bufmgr_fake->lru) {
+      dri_bo_fake *bo_fake = (dri_bo_fake *)block->bo;
+
+      if (bo_fake != NULL && (bo_fake->flags & BM_NO_FENCE_SUBDATA))
+	 continue;
+
+      if (block->fence && max_fence && !FENCE_LTE(block->fence, max_fence))
+	 return 0;
+
+      set_dirty(&bo_fake->bo);
+      bo_fake->block = NULL;
+
+      free_block(bufmgr_fake, block);
+      return GL_TRUE;
+   }
+
+   return GL_FALSE;
+}
+
+#define foreach_s_rev(ptr, t, list)   \
+        for(ptr=(list)->prev,t=(ptr)->prev; list != ptr; ptr=t, t=(t)->prev)
+
+static GLboolean
+evict_mru(dri_bufmgr_fake *bufmgr_fake)
+{
+   struct block *block, *tmp;
+
+   DBG("%s\n", __FUNCTION__);
+
+   foreach_s_rev(block, tmp, &bufmgr_fake->lru) {
+      dri_bo_fake *bo_fake = (dri_bo_fake *)block->bo;
+
+      if (bo_fake && (bo_fake->flags & BM_NO_FENCE_SUBDATA))
+	 continue;
+
+      set_dirty(&bo_fake->bo);
+      bo_fake->block = NULL;
+
+      free_block(bufmgr_fake, block);
+      return GL_TRUE;
+   }
+
+   return GL_FALSE;
+}
+
+/**
+ * Removes all objects from the fenced list older than the given fence.
+ */
+static int clear_fenced(dri_bufmgr_fake *bufmgr_fake,
+			unsigned int fence_cookie)
+{
+   struct block *block, *tmp;
+   int ret = 0;
+
+   foreach_s(block, tmp, &bufmgr_fake->fenced) {
+      assert(block->fenced);
+
+      if (_fence_test(bufmgr_fake, block->fence)) {
+
+	 block->fenced = 0;
+
+	 if (!block->bo) {
+	    DBG("delayed free: offset %x sz %x\n",
+		block->mem->ofs, block->mem->size);
+	    remove_from_list(block);
+	    mmFreeMem(block->mem);
+	    free(block);
+	 }
+	 else {
+	    DBG("return to lru: offset %x sz %x\n",
+		block->mem->ofs, block->mem->size);
+	    move_to_tail(&bufmgr_fake->lru, block);
+	 }
+
+	 ret = 1;
+      }
+      else {
+	 /* Blocks are ordered by fence, so if one fails, all from
+	  * here will fail also:
+	  */
+	DBG("fence not passed: offset %x sz %x %d %d \n",
+	    block->mem->ofs, block->mem->size, block->fence, bufmgr_fake->last_fence);
+	 break;
+      }
+   }
+
+   DBG("%s: %d\n", __FUNCTION__, ret);
+   return ret;
+}
+
+static void fence_blocks(dri_bufmgr_fake *bufmgr_fake, unsigned fence)
+{
+   struct block *block, *tmp;
+
+   foreach_s (block, tmp, &bufmgr_fake->on_hardware) {
+      DBG("Fence block %p (sz 0x%x ofs %x buf %p) with fence %d\n", block,
+	  block->mem->size, block->mem->ofs, block->bo, fence);
+      block->fence = fence;
+
+      block->on_hardware = 0;
+      block->fenced = 1;
+
+      /* Move to tail of pending list here
+       */
+      move_to_tail(&bufmgr_fake->fenced, block);
+   }
+
+   assert(is_empty_list(&bufmgr_fake->on_hardware));
+}
+
+static GLboolean evict_and_alloc_block(dri_bo *bo)
+{
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)bo->bufmgr;
+   dri_bo_fake *bo_fake = (dri_bo_fake *)bo;
+
+   assert(bo_fake->block == NULL);
+
+   /* Search for already free memory:
+    */
+   if (alloc_block(bo))
+      return GL_TRUE;
+
+   /* If we're not thrashing, allow lru eviction to dig deeper into
+    * recently used textures.  We'll probably be thrashing soon:
+    */
+   if (!bufmgr_fake->thrashing) {
+      while (evict_lru(bufmgr_fake, 0))
+	 if (alloc_block(bo))
+	    return GL_TRUE;
+   }
+
+   /* Keep thrashing counter alive?
+    */
+   if (bufmgr_fake->thrashing)
+      bufmgr_fake->thrashing = 20;
+
+   /* Wait on any already pending fences - here we are waiting for any
+    * freed memory that has been submitted to hardware and fenced to
+    * become available:
+    */
+   while (!is_empty_list(&bufmgr_fake->fenced)) {
+      GLuint fence = bufmgr_fake->fenced.next->fence;
+      _fence_wait_internal(bufmgr_fake, fence);
+
+      if (alloc_block(bo))
+	 return GL_TRUE;
+   }
+
+   if (!is_empty_list(&bufmgr_fake->on_hardware)) {
+      while (!is_empty_list(&bufmgr_fake->fenced)) {
+	 GLuint fence = bufmgr_fake->fenced.next->fence;
+	 _fence_wait_internal(bufmgr_fake, fence);
+      }
+
+      if (!bufmgr_fake->thrashing) {
+	 DBG("thrashing\n");
+      }
+      bufmgr_fake->thrashing = 20;
+
+      if (alloc_block(bo))
+	 return GL_TRUE;
+   }
+
+   while (evict_mru(bufmgr_fake))
+      if (alloc_block(bo))
+	 return GL_TRUE;
+
+   DBG("%s 0x%x bytes failed\n", __FUNCTION__, bo->size);
+
+   return GL_FALSE;
+}
+
+/***********************************************************************
+ * Public functions
+ */
+
+/**
+ * Wait for hardware idle by emitting a fence and waiting for it.
+ */
+static void
+dri_bufmgr_fake_wait_idle(dri_bufmgr_fake *bufmgr_fake)
+{
+   unsigned int cookie;
+
+   cookie = bufmgr_fake->fence_emit(bufmgr_fake->driver_priv);
+   _fence_wait_internal(bufmgr_fake, cookie);
+}
+
+/**
+ * Wait for execution pending on a buffer
+ */
+static void
+dri_bufmgr_fake_bo_wait_idle(dri_bo *bo)
+{
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)bo->bufmgr;
+   dri_bo_fake *bo_fake = (dri_bo_fake *)bo;
+
+   if (bo_fake->block == NULL || !bo_fake->block->fenced)
+      return;
+
+   _fence_wait_internal(bufmgr_fake, bo_fake->block->fence);
+}
+
+/* Specifically ignore texture memory sharing.
+ *  -- just evict everything
+ *  -- and wait for idle
+ */
+void
+dri_bufmgr_fake_contended_lock_take(dri_bufmgr *bufmgr)
+{
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)bufmgr;
+   struct block *block, *tmp;
+
+   bufmgr_fake->need_fence = 1;
+   bufmgr_fake->fail = 0;
+
+   /* Wait for hardware idle.  We don't know where acceleration has been
+    * happening, so we'll need to wait anyway before letting anything get
+    * put on the card again.
+    */
+   dri_bufmgr_fake_wait_idle(bufmgr_fake);
+
+   /* Check that we hadn't released the lock without having fenced the last
+    * set of buffers.
+    */
+   assert(is_empty_list(&bufmgr_fake->fenced));
+   assert(is_empty_list(&bufmgr_fake->on_hardware));
+
+   foreach_s(block, tmp, &bufmgr_fake->lru) {
+      assert(_fence_test(bufmgr_fake, block->fence));
+      set_dirty(block->bo);
+   }
+}
+
+static dri_bo *
+dri_fake_bo_alloc(dri_bufmgr *bufmgr, const char *name,
+		  unsigned long size, unsigned int alignment,
+		  uint64_t location_mask)
+{
+   dri_bufmgr_fake *bufmgr_fake;
+   dri_bo_fake *bo_fake;
+
+   bufmgr_fake = (dri_bufmgr_fake *)bufmgr;
+
+   assert(size != 0);
+
+   bo_fake = calloc(1, sizeof(*bo_fake));
+   if (!bo_fake)
+      return NULL;
+
+   bo_fake->bo.size = size;
+   bo_fake->bo.offset = -1;
+   bo_fake->bo.virtual = NULL;
+   bo_fake->bo.bufmgr = bufmgr;
+   bo_fake->refcount = 1;
+
+   /* Alignment must be a power of two */
+   assert((alignment & (alignment - 1)) == 0);
+   if (alignment == 0)
+      alignment = 1;
+   bo_fake->alignment = alignment;
+   bo_fake->id = ++bufmgr_fake->buf_nr;
+   bo_fake->name = name;
+   bo_fake->flags = 0;
+   bo_fake->is_static = GL_FALSE;
+
+   DBG("drm_bo_alloc: (buf %d: %s, %d kb)\n", bo_fake->id, bo_fake->name,
+       bo_fake->bo.size / 1024);
+
+   return &bo_fake->bo;
+}
+
+static dri_bo *
+dri_fake_bo_alloc_static(dri_bufmgr *bufmgr, const char *name,
+			 unsigned long offset, unsigned long size,
+			 void *virtual, uint64_t location_mask)
+{
+   dri_bufmgr_fake *bufmgr_fake;
+   dri_bo_fake *bo_fake;
+
+   bufmgr_fake = (dri_bufmgr_fake *)bufmgr;
+
+   assert(size != 0);
+
+   bo_fake = calloc(1, sizeof(*bo_fake));
+   if (!bo_fake)
+      return NULL;
+
+   bo_fake->bo.size = size;
+   bo_fake->bo.offset = offset;
+   bo_fake->bo.virtual = virtual;
+   bo_fake->bo.bufmgr = bufmgr;
+   bo_fake->refcount = 1;
+   bo_fake->id = ++bufmgr_fake->buf_nr;
+   bo_fake->name = name;
+   bo_fake->flags = BM_PINNED | DRM_BO_FLAG_NO_MOVE;
+   bo_fake->is_static = GL_TRUE;
+
+   DBG("drm_bo_alloc_static: (buf %d: %s, %d kb)\n", bo_fake->id, bo_fake->name,
+       bo_fake->bo.size / 1024);
+
+   return &bo_fake->bo;
+}
+
+static void
+dri_fake_bo_reference(dri_bo *bo)
+{
+   dri_bo_fake *bo_fake = (dri_bo_fake *)bo;
+
+   bo_fake->refcount++;
+}
+
+static void
+dri_fake_bo_unreference(dri_bo *bo)
+{
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)bo->bufmgr;
+   dri_bo_fake *bo_fake = (dri_bo_fake *)bo;
+   int i;
+
+   if (!bo)
+      return;
+
+   if (--bo_fake->refcount == 0) {
+      assert(bo_fake->map_count == 0);
+      /* No remaining references, so free it */
+      if (bo_fake->block)
+	 free_block(bufmgr_fake, bo_fake->block);
+      free_backing_store(bo);
+
+      for (i = 0; i < bo_fake->nr_relocs; i++)
+	 dri_bo_unreference(bo_fake->relocs[i].target_buf);
+
+      DBG("drm_bo_unreference: free buf %d %s\n", bo_fake->id, bo_fake->name);
+
+      free(bo_fake->relocs);
+      free(bo);
+
+      return;
+   }
+}
+
+/**
+ * Set the buffer as not requiring backing store, and instead get the callback
+ * invoked whenever it would be set dirty.
+ */
+void dri_bo_fake_disable_backing_store(dri_bo *bo,
+				       void (*invalidate_cb)(dri_bo *bo,
+							     void *ptr),
+				       void *ptr)
+{
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)bo->bufmgr;
+   dri_bo_fake *bo_fake = (dri_bo_fake *)bo;
+
+   if (bo_fake->backing_store)
+      free_backing_store(bo);
+
+   bo_fake->flags |= BM_NO_BACKING_STORE;
+
+   DBG("disable_backing_store set buf %d dirty\n", bo_fake->id);
+   bo_fake->dirty = 1;
+   bo_fake->invalidate_cb = invalidate_cb;
+   bo_fake->invalidate_ptr = ptr;
+
+   /* Note that it is invalid right from the start.  Also note
+    * invalidate_cb is called with the bufmgr locked, so cannot
+    * itself make bufmgr calls.
+    */
+   if (invalidate_cb != NULL)
+      invalidate_cb(bo, ptr);
+}
+
+/**
+ * Map a buffer into bo->virtual, allocating either card memory space (If
+ * BM_NO_BACKING_STORE or BM_PINNED) or backing store, as necessary.
+ */
+static int
+dri_fake_bo_map(dri_bo *bo, GLboolean write_enable)
+{
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)bo->bufmgr;
+   dri_bo_fake *bo_fake = (dri_bo_fake *)bo;
+
+   /* Static buffers are always mapped. */
+   if (bo_fake->is_static)
+      return 0;
+
+   /* Allow recursive mapping.  Mesa may recursively map buffers with
+    * nested display loops, and it is used internally in bufmgr_fake
+    * for relocation.
+    */
+   if (bo_fake->map_count++ != 0)
+      return 0;
+
+   {
+      DBG("drm_bo_map: (buf %d: %s, %d kb)\n", bo_fake->id, bo_fake->name,
+	  bo_fake->bo.size / 1024);
+
+      if (bo->virtual != NULL) {
+	 _mesa_printf("%s: already mapped\n", __FUNCTION__);
+	 abort();
+      }
+      else if (bo_fake->flags & (BM_NO_BACKING_STORE|BM_PINNED)) {
+
+	 if (!bo_fake->block && !evict_and_alloc_block(bo)) {
+	    DBG("%s: alloc failed\n", __FUNCTION__);
+	    bufmgr_fake->fail = 1;
+	    return 1;
+	 }
+	 else {
+	    assert(bo_fake->block);
+	    bo_fake->dirty = 0;
+
+	    if (!(bo_fake->flags & BM_NO_FENCE_SUBDATA) &&
+		bo_fake->block->fenced) {
+	       dri_bufmgr_fake_bo_wait_idle(bo);
+	    }
+
+	    bo->virtual = bo_fake->block->virtual;
+	 }
+      }
+      else {
+	 if (write_enable)
+	    set_dirty(bo);
+
+	 if (bo_fake->backing_store == 0)
+	    alloc_backing_store(bo);
+
+	 bo->virtual = bo_fake->backing_store;
+      }
+   }
+
+   return 0;
+}
+
+static int
+dri_fake_bo_unmap(dri_bo *bo)
+{
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)bo->bufmgr;
+   dri_bo_fake *bo_fake = (dri_bo_fake *)bo;
+
+   /* Static buffers are always mapped. */
+   if (bo_fake->is_static)
+      return 0;
+
+   assert(bo_fake->map_count != 0);
+   if (--bo_fake->map_count != 0)
+      return 0;
+
+   DBG("drm_bo_unmap: (buf %d: %s, %d kb)\n", bo_fake->id, bo_fake->name,
+       bo_fake->bo.size / 1024);
+
+   bo->virtual = NULL;
+
+   return 0;
+}
+
+static void
+dri_fake_kick_all(dri_bufmgr_fake *bufmgr_fake)
+{
+   struct block *block, *tmp;
+
+   bufmgr_fake->performed_rendering = GL_FALSE;
+   /* okay for ever BO that is on the HW kick it off.
+      seriously not afraid of the POLICE right now */
+   foreach_s(block, tmp, &bufmgr_fake->on_hardware) {
+      dri_bo_fake *bo_fake = (dri_bo_fake *)block->bo;
+
+      block->on_hardware = 0;
+      free_block(bufmgr_fake, block);
+      bo_fake->block = NULL;
+      bo_fake->validated = GL_FALSE;
+      if (!(bo_fake->flags & BM_NO_BACKING_STORE))
+         bo_fake->dirty = 1;
+   }
+}
+
+static int
+dri_fake_bo_validate(dri_bo *bo, uint64_t flags)
+{
+   dri_bufmgr_fake *bufmgr_fake;
+   dri_bo_fake *bo_fake = (dri_bo_fake *)bo;
+
+   /* XXX: Sanity-check whether we've already validated this one under
+    * different flags.  See drmAddValidateItem().
+    */
+   bufmgr_fake = (dri_bufmgr_fake *)bo->bufmgr;
+
+   DBG("drm_bo_validate: (buf %d: %s, %d kb)\n", bo_fake->id, bo_fake->name,
+       bo_fake->bo.size / 1024);
+
+   /* Sanity check: Buffers should be unmapped before being validated.
+    * This is not so much of a problem for bufmgr_fake, but TTM refuses,
+    * and the problem is harder to debug there.
+    */
+   assert(bo_fake->map_count == 0);
+
+   if (bo_fake->is_static) {
+      /* Add it to the needs-fence list */
+      bufmgr_fake->need_fence = 1;
+      return 0;
+   }
+
+   /* reset size accounted */
+   bo_fake->size_accounted = 0;
+
+   /* Allocate the card memory */
+   if (!bo_fake->block && !evict_and_alloc_block(bo)) {
+      bufmgr_fake->fail = 1;
+      DBG("Failed to validate buf %d:%s\n", bo_fake->id, bo_fake->name);
+      return -1;
+   }
+
+   assert(bo_fake->block);
+   assert(bo_fake->block->bo == &bo_fake->bo);
+
+   bo->offset = bo_fake->block->mem->ofs;
+
+   /* Upload the buffer contents if necessary */
+   if (bo_fake->dirty) {
+      DBG("Upload dirty buf %d:%s, sz %d offset 0x%x\n", bo_fake->id,
+	  bo_fake->name, bo->size, bo_fake->block->mem->ofs);
+
+      assert(!(bo_fake->flags &
+	       (BM_NO_BACKING_STORE|BM_PINNED)));
+
+      /* Actually, should be able to just wait for a fence on the memory,
+       * which we would be tracking when we free it.  Waiting for idle is
+       * a sufficiently large hammer for now.
+       */
+      dri_bufmgr_fake_wait_idle(bufmgr_fake);
+
+      /* we may never have mapped this BO so it might not have any backing
+       * store if this happens it should be rare, but 0 the card memory
+       * in any case */
+      if (bo_fake->backing_store)
+         memcpy(bo_fake->block->virtual, bo_fake->backing_store, bo->size);
+      else
+         memset(bo_fake->block->virtual, 0, bo->size);
+
+      bo_fake->dirty = 0;
+   }
+
+   bo_fake->block->fenced = 0;
+   bo_fake->block->on_hardware = 1;
+   move_to_tail(&bufmgr_fake->on_hardware, bo_fake->block);
+
+   bo_fake->validated = GL_TRUE;
+   bufmgr_fake->need_fence = 1;
+
+   return 0;
+}
+
+static dri_fence *
+dri_fake_fence_validated(dri_bufmgr *bufmgr, const char *name,
+			 GLboolean flushed)
+{
+   dri_fence_fake *fence_fake;
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)bufmgr;
+   unsigned int cookie;
+
+   fence_fake = malloc(sizeof(*fence_fake));
+   if (!fence_fake)
+      return NULL;
+
+   fence_fake->refcount = 1;
+   fence_fake->name = name;
+   fence_fake->flushed = flushed;
+   fence_fake->fence.bufmgr = bufmgr;
+
+   cookie = _fence_emit_internal(bufmgr_fake);
+   fence_fake->fence_cookie = cookie;
+   fence_blocks(bufmgr_fake, cookie);
+
+   DBG("drm_fence_validated: 0x%08x cookie\n", fence_fake->fence_cookie);
+
+   return &fence_fake->fence;
+}
+
+static void
+dri_fake_fence_reference(dri_fence *fence)
+{
+   dri_fence_fake *fence_fake = (dri_fence_fake *)fence;
+
+   ++fence_fake->refcount;
+}
+
+static void
+dri_fake_fence_unreference(dri_fence *fence)
+{
+   dri_fence_fake *fence_fake = (dri_fence_fake *)fence;
+
+   if (!fence)
+      return;
+
+   if (--fence_fake->refcount == 0) {
+      free(fence);
+      return;
+   }
+}
+
+static void
+dri_fake_fence_wait(dri_fence *fence)
+{
+   dri_fence_fake *fence_fake = (dri_fence_fake *)fence;
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)fence->bufmgr;
+
+   DBG("drm_fence_wait: 0x%08x cookie\n", fence_fake->fence_cookie);
+
+   _fence_wait_internal(bufmgr_fake, fence_fake->fence_cookie);
+}
+
+static void
+dri_fake_destroy(dri_bufmgr *bufmgr)
+{
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)bufmgr;
+
+   mmDestroy(bufmgr_fake->heap);
+   free(bufmgr);
+}
+
+static int
+dri_fake_emit_reloc(dri_bo *reloc_buf, uint64_t flags, GLuint delta,
+		    GLuint offset, dri_bo *target_buf)
+{
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)reloc_buf->bufmgr;
+   struct fake_buffer_reloc *r;
+   dri_bo_fake *reloc_fake = (dri_bo_fake *)reloc_buf;
+   dri_bo_fake *target_fake = (dri_bo_fake *)target_buf;
+   int i;
+
+   assert(reloc_buf);
+   assert(target_buf);
+
+   assert(target_fake->is_static || target_fake->size_accounted);
+
+   if (reloc_fake->relocs == NULL) {
+      reloc_fake->relocs = malloc(sizeof(struct fake_buffer_reloc) *
+				  MAX_RELOCS);
+   }
+
+   r = &reloc_fake->relocs[reloc_fake->nr_relocs++];
+
+   assert(reloc_fake->nr_relocs <= MAX_RELOCS);
+
+   dri_bo_reference(target_buf);
+
+   r->target_buf = target_buf;
+   r->offset = offset;
+   r->last_target_offset = target_buf->offset;
+   r->delta = delta;
+   r->validate_flags = flags;
+
+   if (bufmgr_fake->debug) {
+      /* Check that a conflicting relocation hasn't already been emitted. */
+      for (i = 0; i < reloc_fake->nr_relocs - 1; i++) {
+	 struct fake_buffer_reloc *r2 = &reloc_fake->relocs[i];
+
+	 assert(r->offset != r2->offset);
+      }
+   }
+
+   return 0;
+}
+
+/**
+ * Incorporates the validation flags associated with each relocation into
+ * the combined validation flags for the buffer on this batchbuffer submission.
+ */
+static void
+dri_fake_calculate_validate_flags(dri_bo *bo)
+{
+   dri_bo_fake *bo_fake = (dri_bo_fake *)bo;
+   int i;
+
+   for (i = 0; i < bo_fake->nr_relocs; i++) {
+      struct fake_buffer_reloc *r = &bo_fake->relocs[i];
+      dri_bo_fake *target_fake = (dri_bo_fake *)r->target_buf;
+
+      /* Do the same for the tree of buffers we depend on */
+      dri_fake_calculate_validate_flags(r->target_buf);
+
+      if (target_fake->validate_flags == 0) {
+	 target_fake->validate_flags = r->validate_flags;
+      } else {
+	 /* Mask the memory location to the intersection of all the memory
+	  * locations the buffer is being validated to.
+	  */
+	 target_fake->validate_flags =
+	    (target_fake->validate_flags & ~DRM_BO_MASK_MEM) |
+	    (r->validate_flags & target_fake->validate_flags &
+	     DRM_BO_MASK_MEM);
+	 /* All the other flags just accumulate. */
+	 target_fake->validate_flags |= r->validate_flags & ~DRM_BO_MASK_MEM;
+      }
+   }
+}
+
+
+static int
+dri_fake_reloc_and_validate_buffer(dri_bo *bo)
+{
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)bo->bufmgr;
+   dri_bo_fake *bo_fake = (dri_bo_fake *)bo;
+   int i, ret;
+
+   assert(bo_fake->map_count == 0);
+
+   for (i = 0; i < bo_fake->nr_relocs; i++) {
+      struct fake_buffer_reloc *r = &bo_fake->relocs[i];
+      dri_bo_fake *target_fake = (dri_bo_fake *)r->target_buf;
+      uint32_t reloc_data;
+
+      /* Validate the target buffer if that hasn't been done. */
+      if (!target_fake->validated) {
+         ret = dri_fake_reloc_and_validate_buffer(r->target_buf);
+         if (ret != 0) {
+            if (bo->virtual != NULL)
+                dri_bo_unmap(bo);
+            return ret;
+         }
+      }
+
+      /* Calculate the value of the relocation entry. */
+      if (r->target_buf->offset != r->last_target_offset) {
+	 reloc_data = r->target_buf->offset + r->delta;
+
+	 if (bo->virtual == NULL)
+	    dri_bo_map(bo, GL_TRUE);
+
+	 *(uint32_t *)(bo->virtual + r->offset) = reloc_data;
+
+	 r->last_target_offset = r->target_buf->offset;
+      }
+   }
+
+   if (bo->virtual != NULL)
+      dri_bo_unmap(bo);
+
+   if (bo_fake->validate_flags & DRM_BO_FLAG_WRITE) {
+      if (!(bo_fake->flags & (BM_NO_BACKING_STORE|BM_PINNED))) {
+         if (bo_fake->backing_store == 0)
+            alloc_backing_store(bo);
+
+         bo_fake->card_dirty = 1;
+      }
+      bufmgr_fake->performed_rendering = GL_TRUE;
+   }
+
+   return dri_fake_bo_validate(bo, bo_fake->validate_flags);
+}
+
+static void *
+dri_fake_process_relocs(dri_bo *batch_buf, GLuint *count_p)
+{
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)batch_buf->bufmgr;
+   dri_bo_fake *batch_fake = (dri_bo_fake *)batch_buf;
+   int ret;
+   int retry_count = 0;
+
+   bufmgr_fake->performed_rendering = GL_FALSE;
+
+   dri_fake_calculate_validate_flags(batch_buf);
+
+   batch_fake->validate_flags = DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_READ;
+
+   /* we've ran out of RAM so blow the whole lot away and retry */
+ restart:
+   ret = dri_fake_reloc_and_validate_buffer(batch_buf);
+   if (bufmgr_fake->fail == 1) {
+      if (retry_count == 0) {
+         retry_count++;
+         dri_fake_kick_all(bufmgr_fake);
+         bufmgr_fake->fail = 0;
+         goto restart;
+      } else /* dump out the memory here */
+         mmDumpMemInfo(bufmgr_fake->heap);
+   }
+
+   assert(ret == 0);
+
+   *count_p = 0; /* junk */
+
+   bufmgr_fake->current_total_size = 0;
+   return NULL;
+}
+
+static void
+dri_bo_fake_post_submit(dri_bo *bo)
+{
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)bo->bufmgr;
+   dri_bo_fake *bo_fake = (dri_bo_fake *)bo;
+   int i;
+
+   for (i = 0; i < bo_fake->nr_relocs; i++) {
+      struct fake_buffer_reloc *r = &bo_fake->relocs[i];
+      dri_bo_fake *target_fake = (dri_bo_fake *)r->target_buf;
+
+      if (target_fake->validated)
+	 dri_bo_fake_post_submit(r->target_buf);
+
+      DBG("%s@0x%08x + 0x%08x -> %s@0x%08x + 0x%08x\n",
+	  bo_fake->name, (uint32_t)bo->offset, r->offset,
+	  target_fake->name, (uint32_t)r->target_buf->offset, r->delta);
+   }
+
+   assert(bo_fake->map_count == 0);
+   bo_fake->validated = GL_FALSE;
+   bo_fake->validate_flags = 0;
+}
+
+
+static void
+dri_fake_post_submit(dri_bo *batch_buf, dri_fence **last_fence)
+{
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)batch_buf->bufmgr;
+   dri_fence *fo;
+
+   fo = dri_fake_fence_validated(batch_buf->bufmgr, "Batch fence", GL_TRUE);
+
+   if (bufmgr_fake->performed_rendering) {
+      dri_fence_unreference(*last_fence);
+      *last_fence = fo;
+   } else {
+      dri_fence_unreference(fo);
+   }
+
+   dri_bo_fake_post_submit(batch_buf);
+}
+
+static int
+dri_fake_check_aperture_space(dri_bo *bo)
+{
+   dri_bufmgr_fake *bufmgr_fake = (dri_bufmgr_fake *)bo->bufmgr;
+   dri_bo_fake *bo_fake = (dri_bo_fake *)bo;
+   GLuint sz;
+
+   sz = (bo->size + bo_fake->alignment - 1) & ~(bo_fake->alignment - 1);
+
+   if (bo_fake->size_accounted || bo_fake->is_static)
+      return 0;
+
+   if (bufmgr_fake->current_total_size + sz > bufmgr_fake->size) {
+     DBG("check_space: %s bo %d %d overflowed bufmgr size %d\n", bo_fake->name, bo_fake->id, sz, bufmgr_fake->size);
+      return -1;
+   }
+
+   bufmgr_fake->current_total_size += sz;
+   bo_fake->size_accounted = 1;
+   DBG("drm_check_space: buf %d, %s %d %d\n", bo_fake->id, bo_fake->name, bo->size, bufmgr_fake->current_total_size);
+   return 0;
+}
+
+dri_bufmgr *
+dri_bufmgr_fake_init(unsigned long low_offset, void *low_virtual,
+		     unsigned long size,
+		     unsigned int (*fence_emit)(void *private),
+		     int (*fence_wait)(void *private, unsigned int cookie),
+		     void *driver_priv)
+{
+   dri_bufmgr_fake *bufmgr_fake;
+
+   bufmgr_fake = calloc(1, sizeof(*bufmgr_fake));
+
+   /* Initialize allocator */
+   make_empty_list(&bufmgr_fake->fenced);
+   make_empty_list(&bufmgr_fake->on_hardware);
+   make_empty_list(&bufmgr_fake->lru);
+
+   bufmgr_fake->low_offset = low_offset;
+   bufmgr_fake->virtual = low_virtual;
+   bufmgr_fake->size = size;
+   bufmgr_fake->heap = mmInit(low_offset, size);
+
+   /* Hook in methods */
+   bufmgr_fake->bufmgr.bo_alloc = dri_fake_bo_alloc;
+   bufmgr_fake->bufmgr.bo_alloc_static = dri_fake_bo_alloc_static;
+   bufmgr_fake->bufmgr.bo_reference = dri_fake_bo_reference;
+   bufmgr_fake->bufmgr.bo_unreference = dri_fake_bo_unreference;
+   bufmgr_fake->bufmgr.bo_map = dri_fake_bo_map;
+   bufmgr_fake->bufmgr.bo_unmap = dri_fake_bo_unmap;
+   bufmgr_fake->bufmgr.fence_wait = dri_fake_fence_wait;
+   bufmgr_fake->bufmgr.fence_reference = dri_fake_fence_reference;
+   bufmgr_fake->bufmgr.fence_unreference = dri_fake_fence_unreference;
+   bufmgr_fake->bufmgr.destroy = dri_fake_destroy;
+   bufmgr_fake->bufmgr.emit_reloc = dri_fake_emit_reloc;
+   bufmgr_fake->bufmgr.process_relocs = dri_fake_process_relocs;
+   bufmgr_fake->bufmgr.post_submit = dri_fake_post_submit;
+   bufmgr_fake->bufmgr.check_aperture_space = dri_fake_check_aperture_space;
+   bufmgr_fake->bufmgr.debug = GL_FALSE;
+
+   bufmgr_fake->fence_emit = fence_emit;
+   bufmgr_fake->fence_wait = fence_wait;
+   bufmgr_fake->driver_priv = driver_priv;
+
+   return &bufmgr_fake->bufmgr;
+}
+
diff --git a/src/mesa/drivers/dri/common/spantmp2.h b/src/mesa/drivers/dri/common/spantmp2.h
index a1e56eb1484..53f5f846a0b 100644
--- a/src/mesa/drivers/dri/common/spantmp2.h
+++ b/src/mesa/drivers/dri/common/spantmp2.h
@@ -48,34 +48,36 @@
 #define HW_WRITE_CLIPLOOP()	HW_CLIPLOOP()
 #endif
 
+
 #if (SPANTMP_PIXEL_FMT == GL_RGB)  && (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_SHORT_5_6_5)
 
 /**
  ** GL_RGB, GL_UNSIGNED_SHORT_5_6_5
  **/
 
-#ifndef GET_VALUE
 #ifndef GET_PTR
 #define GET_PTR(_x, _y) (buf + (_x) * 2 + (_y) * pitch)
 #endif
 
-#define GET_VALUE(_x, _y) *(volatile GLushort *)(GET_PTR(_x, _y))
-#define PUT_VALUE(_x, _y, _v) *(volatile GLushort *)(GET_PTR(_x, _y)) = (_v)
-#endif /* GET_VALUE */
-
 #define INIT_MONO_PIXEL(p, color) \
   p = PACK_COLOR_565( color[0], color[1], color[2] )
 
 #define WRITE_RGBA( _x, _y, r, g, b, a )				\
-   PUT_VALUE(_x, _y, ((((int)r & 0xf8) << 8) |				\
-		      (((int)g & 0xfc) << 3) |				\
-		      (((int)b & 0xf8) >> 3)))				\
+    do {                                                                \
+       GLshort * _p = (GLshort *) GET_PTR(_x, _y);                      \
+       _p[0] = ((((int)r & 0xf8) << 8) | (((int)g & 0xfc) << 3) |	\
+		   (((int)b & 0xf8) >> 3));                             \
+   } while(0)
 
-#define WRITE_PIXEL( _x, _y, p ) PUT_VALUE(_x, _y, p)
+#define WRITE_PIXEL( _x, _y, p )					\
+   do {                                                                 \
+      GLushort * _p = (GLushort *) GET_PTR(_x, _y);                     \
+      _p[0] = p;                                                        \
+   } while(0)
 
 #define READ_RGBA( rgba, _x, _y )					\
    do {									\
-      GLushort p = GET_VALUE(_x, _y);					\
+      GLushort p = *(volatile GLshort *) GET_PTR(_x, _y);               \
       rgba[0] = ((p >> 8) & 0xf8) * 255 / 0xf8;				\
       rgba[1] = ((p >> 3) & 0xfc) * 255 / 0xfc;				\
       rgba[2] = ((p << 3) & 0xf8) * 255 / 0xf8;				\
@@ -88,30 +90,29 @@
  ** GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV
  **/
 
-#ifndef GET_VALUE
 #ifndef GET_PTR
 #define GET_PTR(_x, _y) (     buf + (_x) * 4 + (_y) * pitch)
 #endif
 
-#define GET_VALUE(_x, _y) *(volatile GLuint *)(GET_PTR(_x, _y))
-#define PUT_VALUE(_x, _y, _v) *(volatile GLuint *)(GET_PTR(_x, _y)) = (_v)
-#endif /* GET_VALUE */
-
 # define INIT_MONO_PIXEL(p, color)                       \
      p = PACK_COLOR_8888(color[3], color[0], color[1], color[2]) 
 
 # define WRITE_RGBA(_x, _y, r, g, b, a)                                 \
-   PUT_VALUE(_x, _y, ((r << 16) |					\
-		      (g << 8) |					\
-		      (b << 0) |					\
-		      (a << 24)))
+    do {                                                                \
+       GLuint * _p = (GLuint *) GET_PTR(_x, _y);                        \
+       _p[0] = ((r << 16) | (g << 8) | (b << 0) | (a << 24));           \
+    } while(0)
 
-#define WRITE_PIXEL(_x, _y, p) PUT_VALUE(_x, _y, p)
+#define WRITE_PIXEL(_x, _y, p)                                          \
+    do {                                                                \
+       GLuint * _p = (GLuint *) GET_PTR(_x, _y);                        \
+       _p[0] = p;                                                       \
+    } while(0)
 
 # if defined( USE_X86_ASM )
 #  define READ_RGBA(rgba, _x, _y)                                       \
     do {                                                                \
-       GLuint p = GET_VALUE(_x, _y);					\
+        GLuint p = *(volatile GLuint *) GET_PTR(_x, _y);                \
        __asm__ __volatile__( "bswap	%0; rorl $8, %0"                \
 				: "=r" (p) : "0" (p) );                 \
        ((GLuint *)rgba)[0] = p;                                         \
@@ -122,14 +123,14 @@
      */
 #  define READ_RGBA( rgba, _x, _y )				        \
      do {								\
-        GLuint p = GET_VALUE(_x, _y);					\
+        GLuint p = *(volatile GLuint *) GET_PTR(_x, _y);                \
         GLuint t = p;                                                   \
         *((uint32_t *) rgba) = (t >> 24) | (p << 8);                    \
      } while (0)
 # else
 #  define READ_RGBA( rgba, _x, _y )				        \
      do {								\
-        GLuint p = GET_VALUE(_x, _y);					\
+        GLuint p = *(volatile GLuint *) GET_PTR(_x, _y);                \
 	rgba[0] = (p >> 16) & 0xff;					\
 	rgba[1] = (p >>  8) & 0xff;					\
 	rgba[2] = (p >>  0) & 0xff;					\
@@ -388,8 +389,7 @@ static void TAG(ReadRGBASpan)( GLcontext *ctx,
 }
 
 
-#if defined(GET_PTR) && \
-   defined(USE_MMX_ASM) && \
+#if defined(USE_MMX_ASM) && \
    (((SPANTMP_PIXEL_FMT == GL_BGRA) && \
 	(SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)) || \
     ((SPANTMP_PIXEL_FMT == GL_RGB) && \
@@ -440,8 +440,7 @@ static void TAG2(ReadRGBASpan,_MMX)( GLcontext *ctx,
 #endif
 
 
-#if defined(GET_PTR) &&	\
-   defined(USE_SSE_ASM) && \
+#if defined(USE_SSE_ASM) && \
    (SPANTMP_PIXEL_FMT == GL_BGRA) && \
      (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)
 static void TAG2(ReadRGBASpan,_SSE2)( GLcontext *ctx,
@@ -475,8 +474,7 @@ static void TAG2(ReadRGBASpan,_SSE2)( GLcontext *ctx,
 }
 #endif
 
-#if defined(GET_PTR) &&	\
-   defined(USE_SSE_ASM) && \
+#if defined(USE_SSE_ASM) && \
    (SPANTMP_PIXEL_FMT == GL_BGRA) && \
      (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)
 static void TAG2(ReadRGBASpan,_SSE)( GLcontext *ctx,
@@ -569,7 +567,6 @@ static void TAG(InitPointers)(struct gl_renderbuffer *rb)
    rb->PutMonoValues = TAG(WriteMonoRGBAPixels);
    rb->GetValues = TAG(ReadRGBAPixels);
 
-#if defined(GET_PTR)
 #if defined(USE_SSE_ASM) && \
    (SPANTMP_PIXEL_FMT == GL_BGRA) && \
      (SPANTMP_PIXEL_TYPE == GL_UNSIGNED_INT_8_8_8_8_REV)
@@ -599,7 +596,6 @@ static void TAG(InitPointers)(struct gl_renderbuffer *rb)
    }
    else
 #endif
-#endif /* GET_PTR */
    {
       if (DBG) fprintf( stderr, "Using %s version of GetRow\n", "C" );
       rb->GetRow = TAG(ReadRGBASpan);
@@ -614,8 +610,6 @@ static void TAG(InitPointers)(struct gl_renderbuffer *rb)
 #undef READ_RGBA
 #undef TAG
 #undef TAG2
-#undef GET_VALUE
-#undef PUT_VALUE
 #undef GET_PTR
 #undef SPANTMP_PIXEL_FMT
 #undef SPANTMP_PIXEL_TYPE