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/**************************************************************************

 *

 * Copyright 2003 VMware, Inc.

 * 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 VMWARE 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"

static GLboolean

intel_bufferobj_unmap(struct gl_context * ctx, struct gl_buffer_object *obj,

                      gl_map_buffer_index index);

/** 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);

}

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)

{

   struct intel_buffer_object *obj = CALLOC_STRUCT(intel_buffer_object);

   _mesa_initialize_buffer_object(ctx, &obj->Base, name);

   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)

    */

   _mesa_buffer_unmap_all_mappings(ctx, obj);

   _mesa_align_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,

                     GLbitfield storageFlags,

                     struct gl_buffer_object *obj)

{

   struct intel_context *intel = intel_context(ctx);

   struct intel_buffer_object *intel_obj = intel_buffer_object(obj);

   intel_obj->Base.Size = size;

   intel_obj->Base.Usage = usage;

   intel_obj->Base.StorageFlags = storageFlags;

   assert(!obj->Mappings[MAP_USER].Pointer); /* Mesa should have unmapped it */

   assert(!obj->Mappings[MAP_INTERNAL].Pointer);

   if (intel_obj->buffer != NULL)

      release_buffer(intel_obj);

   _mesa_align_free(intel_obj->sys_buffer);

   intel_obj->sys_buffer = NULL;

   if (size != 0) {

      /* 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 =

            _mesa_align_malloc(size, ctx->Const.MinMapBufferAlignment);

	 if (intel_obj->sys_buffer != NULL) {

	    if (data != NULL)

	       memcpy(intel_obj->sys_buffer, data, size);

	    return true;

	 }

      }

      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;

      }

      _mesa_align_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,

                          gl_map_buffer_index index)

{

   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->Mappings[index].Offset = offset;

   obj->Mappings[index].Length = length;

   obj->Mappings[index].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->Mappings[index].Pointer = intel_obj->sys_buffer + offset;

	 return obj->Mappings[index].Pointer;

      }

      _mesa_align_free(intel_obj->sys_buffer);

      intel_obj->sys_buffer = NULL;

   }

   if (intel_obj->buffer == NULL) {

      obj->Mappings[index].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)) {

      /* Ensure that the base alignment of the allocation meets the alignment

       * guarantees the driver has advertised to the application.

       */

      const unsigned alignment = ctx->Const.MinMapBufferAlignment;

      const unsigned extra = (uintptr_t) offset % alignment;

      if (access & GL_MAP_FLUSH_EXPLICIT_BIT) {

         intel_obj->range_map_buffer[index] =

            _mesa_align_malloc(length + extra, alignment);

         obj->Mappings[index].Pointer =

            intel_obj->range_map_buffer[index] + extra;

      } else {

	 intel_obj->range_map_bo[index] = drm_intel_bo_alloc(intel->bufmgr,

                                                             "range map",

                                                             length + extra,

                                                             alignment);

	 if (!(access & GL_MAP_READ_BIT)) {

	    drm_intel_gem_bo_map_gtt(intel_obj->range_map_bo[index]);

	 } else {

	    drm_intel_bo_map(intel_obj->range_map_bo[index],

			     (access & GL_MAP_WRITE_BIT) != 0);

	 }

	 obj->Mappings[index].Pointer =

            intel_obj->range_map_bo[index]->virtual + extra;

      }

      return obj->Mappings[index].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->Mappings[index].Pointer = intel_obj->buffer->virtual + offset;

   return obj->Mappings[index].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,

                                   gl_map_buffer_index index)

{

   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[index] == NULL)

      return;

   if (length == 0)

      return;

   temp_bo = drm_intel_bo_alloc(intel->bufmgr, "range map flush", length, 64);

   /* Use obj->Pointer instead of intel_obj->range_map_buffer because the

    * former points to the actual mapping while the latter may be offset to

    * meet alignment guarantees.

    */

   drm_intel_bo_subdata(temp_bo, 0, length, obj->Mappings[index].Pointer);

   intel_emit_linear_blit(intel,

			  intel_obj->buffer,

                          obj->Mappings[index].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,

                      gl_map_buffer_index index)

{

   struct intel_context *intel = intel_context(ctx);

   struct intel_buffer_object *intel_obj = intel_buffer_object(obj);

   assert(intel_obj);

   assert(obj->Mappings[index].Pointer);

   if (intel_obj->sys_buffer != NULL) {

      /* always keep the mapping around. */

   } else if (intel_obj->range_map_buffer[index] != 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);

      _mesa_align_free(intel_obj->range_map_buffer[index]);

      intel_obj->range_map_buffer[index] = NULL;

   } else if (intel_obj->range_map_bo[index] != NULL) {

      const unsigned extra = obj->Mappings[index].Pointer -

                             intel_obj->range_map_bo[index]->virtual;

      drm_intel_bo_unmap(intel_obj->range_map_bo[index]);

      intel_emit_linear_blit(intel,

			     intel_obj->buffer, obj->Mappings[index].Offset,

			     intel_obj->range_map_bo[index], extra,

			     obj->Mappings[index].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[index]);

      intel_obj->range_map_bo[index] = NULL;

   } else if (intel_obj->buffer != NULL) {

      drm_intel_bo_unmap(intel_obj->buffer);

   }

   obj->Mappings[index].Pointer = NULL;

   obj->Mappings[index].Offset = 0;

   obj->Mappings[index].Length = 0;

   return true;

}

drm_intel_bo *

intel_bufferobj_buffer(struct intel_context *intel,

                       struct intel_buffer_object *intel_obj)

{

   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);

      _mesa_align_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;

}

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, MAP_INTERNAL);

	 memmove(ptr + write_offset, ptr + read_offset, size);

	 intel_bufferobj_unmap(ctx, dst, MAP_INTERNAL);

      } else {

	 const char *src_ptr;

	 char *dst_ptr;

	 src_ptr =  intel_bufferobj_map_range(ctx, 0, src->Size,

					      GL_MAP_READ_BIT, src,

                                              MAP_INTERNAL);

	 dst_ptr =  intel_bufferobj_map_range(ctx, 0, dst->Size,

					      GL_MAP_WRITE_BIT, dst,

                                              MAP_INTERNAL);

	 memcpy(dst_ptr + write_offset, src_ptr + read_offset, size);

	 intel_bufferobj_unmap(ctx, src, MAP_INTERNAL);

	 intel_bufferobj_unmap(ctx, dst, MAP_INTERNAL);

      }

      return;

   }

   /* Otherwise, we have real BOs, so blit them. */

   dst_bo = intel_bufferobj_buffer(intel, intel_dst);

   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) {

      _mesa_align_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);

      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;

}