i965: Move the remaining intel code to the i965 directory.

Now that i915's forked off, they don't need to live in a shared directory.

Acked-by: Kenneth Graunke <kenneth@whitecape.org>
Acked-by: Chad Versace <chad.versace@linux.intel.com>
Acked-by: Adam Jackson <ajax@redhat.com>
(and I hear second hand that idr is OK with it, too)

1 files changed, 853 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/i965/intel_buffer_objects.c b/src/mesa/drivers/dri/i965/intel_buffer_objects.c
index e06dd3c..f568864 120000..100644
--- a/src/mesa/drivers/dri/i965/intel_buffer_objects.c
+++ b/src/mesa/drivers/dri/i965/intel_buffer_objects.c
@@ -1 +1,853 @@
-../intel/intel_buffer_objects.c
\ No newline at end of file
+/**************************************************************************
+ * 
+ * Copyright 2003 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.
+ * 
+ **************************************************************************/
+
+
+#include "main/imports.h"
+#include "main/mtypes.h"
+#include "main/macros.h"
+#include "main/bufferobj.h"
+
+#include "intel_blit.h"
+#include "intel_buffer_objects.h"
+#include "intel_batchbuffer.h"
+#include "intel_context.h"
+#include "intel_fbo.h"
+#include "intel_mipmap_tree.h"
+#include "intel_regions.h"
+
+#ifndef I915
+#include "brw_context.h"
+#endif
+
+static GLboolean
+intel_bufferobj_unmap(struct gl_context * ctx, struct gl_buffer_object *obj);
+
+/** Allocates a new drm_intel_bo to store the data for the buffer object. */
+static void
+intel_bufferobj_alloc_buffer(struct intel_context *intel,
+			     struct intel_buffer_object *intel_obj)
+{
+   intel_obj->buffer = drm_intel_bo_alloc(intel->bufmgr, "bufferobj",
+					  intel_obj->Base.Size, 64);
+
+#ifndef I915
+   /* the buffer might be bound as a uniform buffer, need to update it
+    */
+   {
+      struct brw_context *brw = brw_context(&intel->ctx);
+      brw->state.dirty.brw |= BRW_NEW_UNIFORM_BUFFER;
+   }
+#endif
+}
+
+static void
+release_buffer(struct intel_buffer_object *intel_obj)
+{
+   drm_intel_bo_unreference(intel_obj->buffer);
+   intel_obj->buffer = NULL;
+   intel_obj->offset = 0;
+   intel_obj->source = 0;
+}
+
+/**
+ * There is some duplication between mesa's bufferobjects and our
+ * bufmgr buffers.  Both have an integer handle and a hashtable to
+ * lookup an opaque structure.  It would be nice if the handles and
+ * internal structure where somehow shared.
+ */
+static struct gl_buffer_object *
+intel_bufferobj_alloc(struct gl_context * ctx, GLuint name, GLenum target)
+{
+   struct intel_buffer_object *obj = CALLOC_STRUCT(intel_buffer_object);
+
+   _mesa_initialize_buffer_object(ctx, &obj->Base, name, target);
+
+   obj->buffer = NULL;
+
+   return &obj->Base;
+}
+
+/**
+ * Deallocate/free a vertex/pixel buffer object.
+ * Called via glDeleteBuffersARB().
+ */
+static void
+intel_bufferobj_free(struct gl_context * ctx, struct gl_buffer_object *obj)
+{
+   struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
+
+   assert(intel_obj);
+
+   /* Buffer objects are automatically unmapped when deleting according
+    * to the spec, but Mesa doesn't do UnmapBuffer for us at context destroy
+    * (though it does if you call glDeleteBuffers)
+    */
+   if (obj->Pointer)
+      intel_bufferobj_unmap(ctx, obj);
+
+   free(intel_obj->sys_buffer);
+
+   drm_intel_bo_unreference(intel_obj->buffer);
+   free(intel_obj);
+}
+
+
+
+/**
+ * Allocate space for and store data in a buffer object.  Any data that was
+ * previously stored in the buffer object is lost.  If data is NULL,
+ * memory will be allocated, but no copy will occur.
+ * Called via ctx->Driver.BufferData().
+ * \return true for success, false if out of memory
+ */
+static GLboolean
+intel_bufferobj_data(struct gl_context * ctx,
+                     GLenum target,
+                     GLsizeiptrARB size,
+                     const GLvoid * data,
+                     GLenum usage, struct gl_buffer_object *obj)
+{
+   struct intel_context *intel = intel_context(ctx);
+   struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
+
+   /* Part of the ABI, but this function doesn't use it.
+    */
+#ifndef I915
+   (void) target;
+#endif
+
+   intel_obj->Base.Size = size;
+   intel_obj->Base.Usage = usage;
+
+   assert(!obj->Pointer); /* Mesa should have unmapped it */
+
+   if (intel_obj->buffer != NULL)
+      release_buffer(intel_obj);
+
+   free(intel_obj->sys_buffer);
+   intel_obj->sys_buffer = NULL;
+
+   if (size != 0) {
+#ifdef I915
+      /* On pre-965, stick VBOs in system memory, as we're always doing
+       * swtnl with their contents anyway.
+       */
+      if (target == GL_ARRAY_BUFFER || target == GL_ELEMENT_ARRAY_BUFFER) {
+	 intel_obj->sys_buffer = malloc(size);
+	 if (intel_obj->sys_buffer != NULL) {
+	    if (data != NULL)
+	       memcpy(intel_obj->sys_buffer, data, size);
+	    return true;
+	 }
+      }
+#endif
+      intel_bufferobj_alloc_buffer(intel, intel_obj);
+      if (!intel_obj->buffer)
+         return false;
+
+      if (data != NULL)
+	 drm_intel_bo_subdata(intel_obj->buffer, 0, size, data);
+   }
+
+   return true;
+}
+
+
+/**
+ * Replace data in a subrange of buffer object.  If the data range
+ * specified by size + offset extends beyond the end of the buffer or
+ * if data is NULL, no copy is performed.
+ * Called via glBufferSubDataARB().
+ */
+static void
+intel_bufferobj_subdata(struct gl_context * ctx,
+                        GLintptrARB offset,
+                        GLsizeiptrARB size,
+                        const GLvoid * data, struct gl_buffer_object *obj)
+{
+   struct intel_context *intel = intel_context(ctx);
+   struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
+   bool busy;
+
+   if (size == 0)
+      return;
+
+   assert(intel_obj);
+
+   /* If we have a single copy in system memory, update that */
+   if (intel_obj->sys_buffer) {
+      if (intel_obj->source)
+	 release_buffer(intel_obj);
+
+      if (intel_obj->buffer == NULL) {
+	 memcpy((char *)intel_obj->sys_buffer + offset, data, size);
+	 return;
+      }
+
+      free(intel_obj->sys_buffer);
+      intel_obj->sys_buffer = NULL;
+   }
+
+   /* Otherwise we need to update the copy in video memory. */
+   busy =
+      drm_intel_bo_busy(intel_obj->buffer) ||
+      drm_intel_bo_references(intel->batch.bo, intel_obj->buffer);
+
+   if (busy) {
+      if (size == intel_obj->Base.Size) {
+	 /* Replace the current busy bo with fresh data. */
+	 drm_intel_bo_unreference(intel_obj->buffer);
+	 intel_bufferobj_alloc_buffer(intel, intel_obj);
+	 drm_intel_bo_subdata(intel_obj->buffer, 0, size, data);
+      } else {
+         perf_debug("Using a blit copy to avoid stalling on %ldb "
+                    "glBufferSubData() to a busy buffer object.\n",
+                    (long)size);
+	 drm_intel_bo *temp_bo =
+	    drm_intel_bo_alloc(intel->bufmgr, "subdata temp", size, 64);
+
+	 drm_intel_bo_subdata(temp_bo, 0, size, data);
+
+	 intel_emit_linear_blit(intel,
+				intel_obj->buffer, offset,
+				temp_bo, 0,
+				size);
+
+	 drm_intel_bo_unreference(temp_bo);
+      }
+   } else {
+      drm_intel_bo_subdata(intel_obj->buffer, offset, size, data);
+   }
+}
+
+
+/**
+ * Called via glGetBufferSubDataARB().
+ */
+static void
+intel_bufferobj_get_subdata(struct gl_context * ctx,
+                            GLintptrARB offset,
+                            GLsizeiptrARB size,
+                            GLvoid * data, struct gl_buffer_object *obj)
+{
+   struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
+   struct intel_context *intel = intel_context(ctx);
+
+   assert(intel_obj);
+   if (intel_obj->sys_buffer)
+      memcpy(data, (char *)intel_obj->sys_buffer + offset, size);
+   else {
+      if (drm_intel_bo_references(intel->batch.bo, intel_obj->buffer)) {
+	 intel_batchbuffer_flush(intel);
+      }
+      drm_intel_bo_get_subdata(intel_obj->buffer, offset, size, data);
+   }
+}
+
+
+
+/**
+ * Called via glMapBufferRange and glMapBuffer
+ *
+ * The goal of this extension is to allow apps to accumulate their rendering
+ * at the same time as they accumulate their buffer object.  Without it,
+ * you'd end up blocking on execution of rendering every time you mapped
+ * the buffer to put new data in.
+ *
+ * We support it in 3 ways: If unsynchronized, then don't bother
+ * flushing the batchbuffer before mapping the buffer, which can save blocking
+ * in many cases.  If we would still block, and they allow the whole buffer
+ * to be invalidated, then just allocate a new buffer to replace the old one.
+ * If not, and we'd block, and they allow the subrange of the buffer to be
+ * invalidated, then we can make a new little BO, let them write into that,
+ * and blit it into the real BO at unmap time.
+ */
+static void *
+intel_bufferobj_map_range(struct gl_context * ctx,
+			  GLintptr offset, GLsizeiptr length,
+			  GLbitfield access, struct gl_buffer_object *obj)
+{
+   struct intel_context *intel = intel_context(ctx);
+   struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
+
+   assert(intel_obj);
+
+   /* _mesa_MapBufferRange (GL entrypoint) sets these, but the vbo module also
+    * internally uses our functions directly.
+    */
+   obj->Offset = offset;
+   obj->Length = length;
+   obj->AccessFlags = access;
+
+   if (intel_obj->sys_buffer) {
+      const bool read_only =
+	 (access & (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT)) == GL_MAP_READ_BIT;
+
+      if (!read_only && intel_obj->source)
+	 release_buffer(intel_obj);
+
+      if (!intel_obj->buffer || intel_obj->source) {
+	 obj->Pointer = intel_obj->sys_buffer + offset;
+	 return obj->Pointer;
+      }
+
+      free(intel_obj->sys_buffer);
+      intel_obj->sys_buffer = NULL;
+   }
+
+   if (intel_obj->buffer == NULL) {
+      obj->Pointer = NULL;
+      return NULL;
+   }
+
+   /* If the access is synchronized (like a normal buffer mapping), then get
+    * things flushed out so the later mapping syncs appropriately through GEM.
+    * If the user doesn't care about existing buffer contents and mapping would
+    * cause us to block, then throw out the old buffer.
+    *
+    * If they set INVALIDATE_BUFFER, we can pitch the current contents to
+    * achieve the required synchronization.
+    */
+   if (!(access & GL_MAP_UNSYNCHRONIZED_BIT)) {
+      if (drm_intel_bo_references(intel->batch.bo, intel_obj->buffer)) {
+	 if (access & GL_MAP_INVALIDATE_BUFFER_BIT) {
+	    drm_intel_bo_unreference(intel_obj->buffer);
+	    intel_bufferobj_alloc_buffer(intel, intel_obj);
+	 } else {
+            perf_debug("Stalling on the GPU for mapping a busy buffer "
+                       "object\n");
+	    intel_flush(ctx);
+	 }
+      } else if (drm_intel_bo_busy(intel_obj->buffer) &&
+		 (access & GL_MAP_INVALIDATE_BUFFER_BIT)) {
+	 drm_intel_bo_unreference(intel_obj->buffer);
+	 intel_bufferobj_alloc_buffer(intel, intel_obj);
+      }
+   }
+
+   /* If the user is mapping a range of an active buffer object but
+    * doesn't require the current contents of that range, make a new
+    * BO, and we'll copy what they put in there out at unmap or
+    * FlushRange time.
+    */
+   if ((access & GL_MAP_INVALIDATE_RANGE_BIT) &&
+       drm_intel_bo_busy(intel_obj->buffer)) {
+      if (access & GL_MAP_FLUSH_EXPLICIT_BIT) {
+	 intel_obj->range_map_buffer = malloc(length);
+	 obj->Pointer = intel_obj->range_map_buffer;
+      } else {
+	 intel_obj->range_map_bo = drm_intel_bo_alloc(intel->bufmgr,
+						      "range map",
+						      length, 64);
+	 if (!(access & GL_MAP_READ_BIT)) {
+	    drm_intel_gem_bo_map_gtt(intel_obj->range_map_bo);
+	 } else {
+	    drm_intel_bo_map(intel_obj->range_map_bo,
+			     (access & GL_MAP_WRITE_BIT) != 0);
+	 }
+	 obj->Pointer = intel_obj->range_map_bo->virtual;
+      }
+      return obj->Pointer;
+   }
+
+   if (access & GL_MAP_UNSYNCHRONIZED_BIT)
+      drm_intel_gem_bo_map_unsynchronized(intel_obj->buffer);
+   else if (!(access & GL_MAP_READ_BIT)) {
+      drm_intel_gem_bo_map_gtt(intel_obj->buffer);
+   } else {
+      drm_intel_bo_map(intel_obj->buffer, (access & GL_MAP_WRITE_BIT) != 0);
+   }
+
+   obj->Pointer = intel_obj->buffer->virtual + offset;
+   return obj->Pointer;
+}
+
+/* Ideally we'd use a BO to avoid taking up cache space for the temporary
+ * data, but FlushMappedBufferRange may be followed by further writes to
+ * the pointer, so we would have to re-map after emitting our blit, which
+ * would defeat the point.
+ */
+static void
+intel_bufferobj_flush_mapped_range(struct gl_context *ctx,
+				   GLintptr offset, GLsizeiptr length,
+				   struct gl_buffer_object *obj)
+{
+   struct intel_context *intel = intel_context(ctx);
+   struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
+   drm_intel_bo *temp_bo;
+
+   /* Unless we're in the range map using a temporary system buffer,
+    * there's no work to do.
+    */
+   if (intel_obj->range_map_buffer == NULL)
+      return;
+
+   if (length == 0)
+      return;
+
+   temp_bo = drm_intel_bo_alloc(intel->bufmgr, "range map flush", length, 64);
+
+   drm_intel_bo_subdata(temp_bo, 0, length, intel_obj->range_map_buffer);
+
+   intel_emit_linear_blit(intel,
+			  intel_obj->buffer, obj->Offset + offset,
+			  temp_bo, 0,
+			  length);
+
+   drm_intel_bo_unreference(temp_bo);
+}
+
+
+/**
+ * Called via glUnmapBuffer().
+ */
+static GLboolean
+intel_bufferobj_unmap(struct gl_context * ctx, struct gl_buffer_object *obj)
+{
+   struct intel_context *intel = intel_context(ctx);
+   struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
+
+   assert(intel_obj);
+   assert(obj->Pointer);
+   if (intel_obj->sys_buffer != NULL) {
+      /* always keep the mapping around. */
+   } else if (intel_obj->range_map_buffer != NULL) {
+      /* Since we've emitted some blits to buffers that will (likely) be used
+       * in rendering operations in other cache domains in this batch, emit a
+       * flush.  Once again, we wish for a domain tracker in libdrm to cover
+       * usage inside of a batchbuffer.
+       */
+      intel_batchbuffer_emit_mi_flush(intel);
+      free(intel_obj->range_map_buffer);
+      intel_obj->range_map_buffer = NULL;
+   } else if (intel_obj->range_map_bo != NULL) {
+      drm_intel_bo_unmap(intel_obj->range_map_bo);
+
+      intel_emit_linear_blit(intel,
+			     intel_obj->buffer, obj->Offset,
+			     intel_obj->range_map_bo, 0,
+			     obj->Length);
+
+      /* Since we've emitted some blits to buffers that will (likely) be used
+       * in rendering operations in other cache domains in this batch, emit a
+       * flush.  Once again, we wish for a domain tracker in libdrm to cover
+       * usage inside of a batchbuffer.
+       */
+      intel_batchbuffer_emit_mi_flush(intel);
+
+      drm_intel_bo_unreference(intel_obj->range_map_bo);
+      intel_obj->range_map_bo = NULL;
+   } else if (intel_obj->buffer != NULL) {
+      drm_intel_bo_unmap(intel_obj->buffer);
+   }
+   obj->Pointer = NULL;
+   obj->Offset = 0;
+   obj->Length = 0;
+
+   return true;
+}
+
+drm_intel_bo *
+intel_bufferobj_buffer(struct intel_context *intel,
+                       struct intel_buffer_object *intel_obj,
+		       GLuint flag)
+{
+   if (intel_obj->source)
+      release_buffer(intel_obj);
+
+   if (intel_obj->buffer == NULL) {
+      intel_bufferobj_alloc_buffer(intel, intel_obj);
+      drm_intel_bo_subdata(intel_obj->buffer,
+			   0, intel_obj->Base.Size,
+			   intel_obj->sys_buffer);
+
+      free(intel_obj->sys_buffer);
+      intel_obj->sys_buffer = NULL;
+      intel_obj->offset = 0;
+   }
+
+   return intel_obj->buffer;
+}
+
+#define INTEL_UPLOAD_SIZE (64*1024)
+
+void
+intel_upload_finish(struct intel_context *intel)
+{
+   if (!intel->upload.bo)
+	   return;
+
+   if (intel->upload.buffer_len) {
+	   drm_intel_bo_subdata(intel->upload.bo,
+				intel->upload.buffer_offset,
+				intel->upload.buffer_len,
+				intel->upload.buffer);
+	   intel->upload.buffer_len = 0;
+   }
+
+   drm_intel_bo_unreference(intel->upload.bo);
+   intel->upload.bo = NULL;
+}
+
+static void wrap_buffers(struct intel_context *intel, GLuint size)
+{
+   intel_upload_finish(intel);
+
+   if (size < INTEL_UPLOAD_SIZE)
+      size = INTEL_UPLOAD_SIZE;
+
+   intel->upload.bo = drm_intel_bo_alloc(intel->bufmgr, "upload", size, 0);
+   intel->upload.offset = 0;
+}
+
+void intel_upload_data(struct intel_context *intel,
+		       const void *ptr, GLuint size, GLuint align,
+		       drm_intel_bo **return_bo,
+		       GLuint *return_offset)
+{
+   GLuint base, delta;
+
+   base = (intel->upload.offset + align - 1) / align * align;
+   if (intel->upload.bo == NULL || base + size > intel->upload.bo->size) {
+      wrap_buffers(intel, size);
+      base = 0;
+   }
+
+   drm_intel_bo_reference(intel->upload.bo);
+   *return_bo = intel->upload.bo;
+   *return_offset = base;
+
+   delta = base - intel->upload.offset;
+   if (intel->upload.buffer_len &&
+       intel->upload.buffer_len + delta + size > sizeof(intel->upload.buffer))
+   {
+      drm_intel_bo_subdata(intel->upload.bo,
+			   intel->upload.buffer_offset,
+			   intel->upload.buffer_len,
+			   intel->upload.buffer);
+      intel->upload.buffer_len = 0;
+   }
+
+   if (size < sizeof(intel->upload.buffer))
+   {
+      if (intel->upload.buffer_len == 0)
+	 intel->upload.buffer_offset = base;
+      else
+	 intel->upload.buffer_len += delta;
+
+      memcpy(intel->upload.buffer + intel->upload.buffer_len, ptr, size);
+      intel->upload.buffer_len += size;
+   }
+   else
+   {
+      drm_intel_bo_subdata(intel->upload.bo, base, size, ptr);
+   }
+
+   intel->upload.offset = base + size;
+}
+
+void *intel_upload_map(struct intel_context *intel, GLuint size, GLuint align)
+{
+   GLuint base, delta;
+   char *ptr;
+
+   base = (intel->upload.offset + align - 1) / align * align;
+   if (intel->upload.bo == NULL || base + size > intel->upload.bo->size) {
+      wrap_buffers(intel, size);
+      base = 0;
+   }
+
+   delta = base - intel->upload.offset;
+   if (intel->upload.buffer_len &&
+       intel->upload.buffer_len + delta + size > sizeof(intel->upload.buffer))
+   {
+      drm_intel_bo_subdata(intel->upload.bo,
+			   intel->upload.buffer_offset,
+			   intel->upload.buffer_len,
+			   intel->upload.buffer);
+      intel->upload.buffer_len = 0;
+   }
+
+   if (size <= sizeof(intel->upload.buffer)) {
+      if (intel->upload.buffer_len == 0)
+	 intel->upload.buffer_offset = base;
+      else
+	 intel->upload.buffer_len += delta;
+
+      ptr = intel->upload.buffer + intel->upload.buffer_len;
+      intel->upload.buffer_len += size;
+   } else
+      ptr = malloc(size);
+
+   return ptr;
+}
+
+void intel_upload_unmap(struct intel_context *intel,
+			const void *ptr, GLuint size, GLuint align,
+			drm_intel_bo **return_bo,
+			GLuint *return_offset)
+{
+   GLuint base;
+
+   base = (intel->upload.offset + align - 1) / align * align;
+   if (size > sizeof(intel->upload.buffer)) {
+      drm_intel_bo_subdata(intel->upload.bo, base, size, ptr);
+      free((void*)ptr);
+   }
+
+   drm_intel_bo_reference(intel->upload.bo);
+   *return_bo = intel->upload.bo;
+   *return_offset = base;
+
+   intel->upload.offset = base + size;
+}
+
+drm_intel_bo *
+intel_bufferobj_source(struct intel_context *intel,
+                       struct intel_buffer_object *intel_obj,
+		       GLuint align, GLuint *offset)
+{
+   if (intel_obj->buffer == NULL) {
+      intel_upload_data(intel,
+			intel_obj->sys_buffer, intel_obj->Base.Size, align,
+			&intel_obj->buffer, &intel_obj->offset);
+      intel_obj->source = 1;
+   }
+
+   *offset = intel_obj->offset;
+   return intel_obj->buffer;
+}
+
+static void
+intel_bufferobj_copy_subdata(struct gl_context *ctx,
+			     struct gl_buffer_object *src,
+			     struct gl_buffer_object *dst,
+			     GLintptr read_offset, GLintptr write_offset,
+			     GLsizeiptr size)
+{
+   struct intel_context *intel = intel_context(ctx);
+   struct intel_buffer_object *intel_src = intel_buffer_object(src);
+   struct intel_buffer_object *intel_dst = intel_buffer_object(dst);
+   drm_intel_bo *src_bo, *dst_bo;
+   GLuint src_offset;
+
+   if (size == 0)
+      return;
+
+   /* If we're in system memory, just map and memcpy. */
+   if (intel_src->sys_buffer || intel_dst->sys_buffer) {
+      /* The same buffer may be used, but note that regions copied may
+       * not overlap.
+       */
+      if (src == dst) {
+	 char *ptr = intel_bufferobj_map_range(ctx, 0, dst->Size,
+					       GL_MAP_READ_BIT |
+					       GL_MAP_WRITE_BIT,
+					       dst);
+	 memmove(ptr + write_offset, ptr + read_offset, size);
+	 intel_bufferobj_unmap(ctx, dst);
+      } else {
+	 const char *src_ptr;
+	 char *dst_ptr;
+
+	 src_ptr =  intel_bufferobj_map_range(ctx, 0, src->Size,
+					      GL_MAP_READ_BIT, src);
+	 dst_ptr =  intel_bufferobj_map_range(ctx, 0, dst->Size,
+					      GL_MAP_WRITE_BIT, dst);
+
+	 memcpy(dst_ptr + write_offset, src_ptr + read_offset, size);
+
+	 intel_bufferobj_unmap(ctx, src);
+	 intel_bufferobj_unmap(ctx, dst);
+      }
+      return;
+   }
+
+   /* Otherwise, we have real BOs, so blit them. */
+
+   dst_bo = intel_bufferobj_buffer(intel, intel_dst, INTEL_WRITE_PART);
+   src_bo = intel_bufferobj_source(intel, intel_src, 64, &src_offset);
+
+   intel_emit_linear_blit(intel,
+			  dst_bo, write_offset,
+			  src_bo, read_offset + src_offset, size);
+
+   /* Since we've emitted some blits to buffers that will (likely) be used
+    * in rendering operations in other cache domains in this batch, emit a
+    * flush.  Once again, we wish for a domain tracker in libdrm to cover
+    * usage inside of a batchbuffer.
+    */
+   intel_batchbuffer_emit_mi_flush(intel);
+}
+
+static GLenum
+intel_buffer_purgeable(drm_intel_bo *buffer)
+{
+   int retained = 0;
+
+   if (buffer != NULL)
+      retained = drm_intel_bo_madvise (buffer, I915_MADV_DONTNEED);
+
+   return retained ? GL_VOLATILE_APPLE : GL_RELEASED_APPLE;
+}
+
+static GLenum
+intel_buffer_object_purgeable(struct gl_context * ctx,
+                              struct gl_buffer_object *obj,
+                              GLenum option)
+{
+   struct intel_buffer_object *intel_obj = intel_buffer_object (obj);
+
+   if (intel_obj->buffer != NULL)
+      return intel_buffer_purgeable(intel_obj->buffer);
+
+   if (option == GL_RELEASED_APPLE) {
+      free(intel_obj->sys_buffer);
+      intel_obj->sys_buffer = NULL;
+
+      return GL_RELEASED_APPLE;
+   } else {
+      /* XXX Create the buffer and madvise(MADV_DONTNEED)? */
+      struct intel_context *intel = intel_context(ctx);
+      drm_intel_bo *bo = intel_bufferobj_buffer(intel, intel_obj, INTEL_READ);
+
+      return intel_buffer_purgeable(bo);
+   }
+}
+
+static GLenum
+intel_texture_object_purgeable(struct gl_context * ctx,
+                               struct gl_texture_object *obj,
+                               GLenum option)
+{
+   struct intel_texture_object *intel;
+
+   (void) ctx;
+   (void) option;
+
+   intel = intel_texture_object(obj);
+   if (intel->mt == NULL || intel->mt->region == NULL)
+      return GL_RELEASED_APPLE;
+
+   return intel_buffer_purgeable(intel->mt->region->bo);
+}
+
+static GLenum
+intel_render_object_purgeable(struct gl_context * ctx,
+                              struct gl_renderbuffer *obj,
+                              GLenum option)
+{
+   struct intel_renderbuffer *intel;
+
+   (void) ctx;
+   (void) option;
+
+   intel = intel_renderbuffer(obj);
+   if (intel->mt == NULL)
+      return GL_RELEASED_APPLE;
+
+   return intel_buffer_purgeable(intel->mt->region->bo);
+}
+
+static GLenum
+intel_buffer_unpurgeable(drm_intel_bo *buffer)
+{
+   int retained;
+
+   retained = 0;
+   if (buffer != NULL)
+      retained = drm_intel_bo_madvise (buffer, I915_MADV_WILLNEED);
+
+   return retained ? GL_RETAINED_APPLE : GL_UNDEFINED_APPLE;
+}
+
+static GLenum
+intel_buffer_object_unpurgeable(struct gl_context * ctx,
+                                struct gl_buffer_object *obj,
+                                GLenum option)
+{
+   (void) ctx;
+   (void) option;
+
+   return intel_buffer_unpurgeable(intel_buffer_object (obj)->buffer);
+}
+
+static GLenum
+intel_texture_object_unpurgeable(struct gl_context * ctx,
+                                 struct gl_texture_object *obj,
+                                 GLenum option)
+{
+   struct intel_texture_object *intel;
+
+   (void) ctx;
+   (void) option;
+
+   intel = intel_texture_object(obj);
+   if (intel->mt == NULL || intel->mt->region == NULL)
+      return GL_UNDEFINED_APPLE;
+
+   return intel_buffer_unpurgeable(intel->mt->region->bo);
+}
+
+static GLenum
+intel_render_object_unpurgeable(struct gl_context * ctx,
+                                struct gl_renderbuffer *obj,
+                                GLenum option)
+{
+   struct intel_renderbuffer *intel;
+
+   (void) ctx;
+   (void) option;
+
+   intel = intel_renderbuffer(obj);
+   if (intel->mt == NULL)
+      return GL_UNDEFINED_APPLE;
+
+   return intel_buffer_unpurgeable(intel->mt->region->bo);
+}
+
+void
+intelInitBufferObjectFuncs(struct dd_function_table *functions)
+{
+   functions->NewBufferObject = intel_bufferobj_alloc;
+   functions->DeleteBuffer = intel_bufferobj_free;
+   functions->BufferData = intel_bufferobj_data;
+   functions->BufferSubData = intel_bufferobj_subdata;
+   functions->GetBufferSubData = intel_bufferobj_get_subdata;
+   functions->MapBufferRange = intel_bufferobj_map_range;
+   functions->FlushMappedBufferRange = intel_bufferobj_flush_mapped_range;
+   functions->UnmapBuffer = intel_bufferobj_unmap;
+   functions->CopyBufferSubData = intel_bufferobj_copy_subdata;
+
+   functions->BufferObjectPurgeable = intel_buffer_object_purgeable;
+   functions->TextureObjectPurgeable = intel_texture_object_purgeable;
+   functions->RenderObjectPurgeable = intel_render_object_purgeable;
+
+   functions->BufferObjectUnpurgeable = intel_buffer_object_unpurgeable;
+   functions->TextureObjectUnpurgeable = intel_texture_object_unpurgeable;
+   functions->RenderObjectUnpurgeable = intel_render_object_unpurgeable;
+}