drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c - maze/linux - Git at Google

 /**************************************************************************
  *
  * Copyright © 2009 VMware, Inc., Palo Alto, CA., 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 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
  * 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.
  *
  **************************************************************************/

 #include "vmwgfx_drv.h"
 #include <drm/ttm/ttm_bo_driver.h>
 #include <drm/ttm/ttm_placement.h>
 #include <drm/ttm/ttm_page_alloc.h>

 static uint32_t vram_placement_flags = TTM_PL_FLAG_VRAM |
 	TTM_PL_FLAG_CACHED;

 static uint32_t vram_ne_placement_flags = TTM_PL_FLAG_VRAM |
 	TTM_PL_FLAG_CACHED |
 	TTM_PL_FLAG_NO_EVICT;

 static uint32_t sys_placement_flags = TTM_PL_FLAG_SYSTEM |
 	TTM_PL_FLAG_CACHED;

 static uint32_t gmr_placement_flags = VMW_PL_FLAG_GMR |
 	TTM_PL_FLAG_CACHED;

 static uint32_t gmr_ne_placement_flags = VMW_PL_FLAG_GMR |
 	TTM_PL_FLAG_CACHED |
 	TTM_PL_FLAG_NO_EVICT;

 struct ttm_placement vmw_vram_placement = {
 	.fpfn = 0,
 	.lpfn = 0,
 	.num_placement = 1,
 	.placement = &vram_placement_flags,
 	.num_busy_placement = 1,
 	.busy_placement = &vram_placement_flags
 };

 static uint32_t vram_gmr_placement_flags[] = {
 	TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
 	VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
 };

 static uint32_t gmr_vram_placement_flags[] = {
 	VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED,
 	TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED
 };

 struct ttm_placement vmw_vram_gmr_placement = {
 	.fpfn = 0,
 	.lpfn = 0,
 	.num_placement = 2,
 	.placement = vram_gmr_placement_flags,
 	.num_busy_placement = 1,
 	.busy_placement = &gmr_placement_flags
 };

 static uint32_t vram_gmr_ne_placement_flags[] = {
 	TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT,
 	VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
 };

 struct ttm_placement vmw_vram_gmr_ne_placement = {
 	.fpfn = 0,
 	.lpfn = 0,
 	.num_placement = 2,
 	.placement = vram_gmr_ne_placement_flags,
 	.num_busy_placement = 1,
 	.busy_placement = &gmr_ne_placement_flags
 };

 struct ttm_placement vmw_vram_sys_placement = {
 	.fpfn = 0,
 	.lpfn = 0,
 	.num_placement = 1,
 	.placement = &vram_placement_flags,
 	.num_busy_placement = 1,
 	.busy_placement = &sys_placement_flags
 };

 struct ttm_placement vmw_vram_ne_placement = {
 	.fpfn = 0,
 	.lpfn = 0,
 	.num_placement = 1,
 	.placement = &vram_ne_placement_flags,
 	.num_busy_placement = 1,
 	.busy_placement = &vram_ne_placement_flags
 };

 struct ttm_placement vmw_sys_placement = {
 	.fpfn = 0,
 	.lpfn = 0,
 	.num_placement = 1,
 	.placement = &sys_placement_flags,
 	.num_busy_placement = 1,
 	.busy_placement = &sys_placement_flags
 };

 static uint32_t evictable_placement_flags[] = {
 	TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED,
 	TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
 	VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
 };

 struct ttm_placement vmw_evictable_placement = {
 	.fpfn = 0,
 	.lpfn = 0,
 	.num_placement = 3,
 	.placement = evictable_placement_flags,
 	.num_busy_placement = 1,
 	.busy_placement = &sys_placement_flags
 };

 struct ttm_placement vmw_srf_placement = {
 	.fpfn = 0,
 	.lpfn = 0,
 	.num_placement = 1,
 	.num_busy_placement = 2,
 	.placement = &gmr_placement_flags,
 	.busy_placement = gmr_vram_placement_flags
 };

 struct vmw_ttm_tt {
 	struct ttm_tt ttm;
 	struct vmw_private *dev_priv;
 	int gmr_id;
 };

 static int vmw_ttm_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
 {
 	struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);

 	vmw_be->gmr_id = bo_mem->start;

 	return vmw_gmr_bind(vmw_be->dev_priv, ttm->pages,
 			    ttm->num_pages, vmw_be->gmr_id);
 }

 static int vmw_ttm_unbind(struct ttm_tt *ttm)
 {
 	struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);

 	vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
 	return 0;
 }

 static void vmw_ttm_destroy(struct ttm_tt *ttm)
 {
 	struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);

 	ttm_tt_fini(ttm);
 	kfree(vmw_be);
 }

 static struct ttm_backend_func vmw_ttm_func = {
 	.bind = vmw_ttm_bind,
 	.unbind = vmw_ttm_unbind,
 	.destroy = vmw_ttm_destroy,
 };

 struct ttm_tt *vmw_ttm_tt_create(struct ttm_bo_device *bdev,
 				 unsigned long size, uint32_t page_flags,
 				 struct page *dummy_read_page)
 {
 	struct vmw_ttm_tt *vmw_be;

 	vmw_be = kmalloc(sizeof(*vmw_be), GFP_KERNEL);
 	if (!vmw_be)
 		return NULL;

 	vmw_be->ttm.func = &vmw_ttm_func;
 	vmw_be->dev_priv = container_of(bdev, struct vmw_private, bdev);

 	if (ttm_tt_init(&vmw_be->ttm, bdev, size, page_flags, dummy_read_page)) {
 		kfree(vmw_be);
 		return NULL;
 	}

 	return &vmw_be->ttm;
 }

 int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
 {
 	return 0;
 }

 int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 		      struct ttm_mem_type_manager *man)
 {
 	switch (type) {
 	case TTM_PL_SYSTEM:
 		/* System memory */

 		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 		man->available_caching = TTM_PL_FLAG_CACHED;
 		man->default_caching = TTM_PL_FLAG_CACHED;
 		break;
 	case TTM_PL_VRAM:
 		/* "On-card" video ram */
 		man->func = &ttm_bo_manager_func;
 		man->gpu_offset = 0;
 		man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
 		man->available_caching = TTM_PL_FLAG_CACHED;
 		man->default_caching = TTM_PL_FLAG_CACHED;
 		break;
 	case VMW_PL_GMR:
 		/*
 		 * "Guest Memory Regions" is an aperture like feature with
 		 *  one slot per bo. There is an upper limit of the number of
 		 *  slots as well as the bo size.
 		 */
 		man->func = &vmw_gmrid_manager_func;
 		man->gpu_offset = 0;
 		man->flags = TTM_MEMTYPE_FLAG_CMA | TTM_MEMTYPE_FLAG_MAPPABLE;
 		man->available_caching = TTM_PL_FLAG_CACHED;
 		man->default_caching = TTM_PL_FLAG_CACHED;
 		break;
 	default:
 		DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 		return -EINVAL;
 	}
 	return 0;
 }

 void vmw_evict_flags(struct ttm_buffer_object *bo,
 		     struct ttm_placement *placement)
 {
 	*placement = vmw_sys_placement;
 }

 static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 {
 	struct ttm_object_file *tfile =
 		vmw_fpriv((struct drm_file *)filp->private_data)->tfile;

 	return vmw_user_dmabuf_verify_access(bo, tfile);
 }

 static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 {
 	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 	struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);

 	mem->bus.addr = NULL;
 	mem->bus.is_iomem = false;
 	mem->bus.offset = 0;
 	mem->bus.size = mem->num_pages << PAGE_SHIFT;
 	mem->bus.base = 0;
 	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 		return -EINVAL;
 	switch (mem->mem_type) {
 	case TTM_PL_SYSTEM:
 	case VMW_PL_GMR:
 		return 0;
 	case TTM_PL_VRAM:
 		mem->bus.offset = mem->start << PAGE_SHIFT;
 		mem->bus.base = dev_priv->vram_start;
 		mem->bus.is_iomem = true;
 		break;
 	default:
 		return -EINVAL;
 	}
 	return 0;
 }

 static void vmw_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 {
 }

 static int vmw_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
 {
 	return 0;
 }

 /**
  * FIXME: We're using the old vmware polling method to sync.
  * Do this with fences instead.
  */

 static void *vmw_sync_obj_ref(void *sync_obj)
 {

 	return (void *)
 		vmw_fence_obj_reference((struct vmw_fence_obj *) sync_obj);
 }

 static void vmw_sync_obj_unref(void **sync_obj)
 {
 	vmw_fence_obj_unreference((struct vmw_fence_obj **) sync_obj);
 }

 static int vmw_sync_obj_flush(void *sync_obj)
 {
 	vmw_fence_obj_flush((struct vmw_fence_obj *) sync_obj);
 	return 0;
 }

 static bool vmw_sync_obj_signaled(void *sync_obj)
 {
 	return	vmw_fence_obj_signaled((struct vmw_fence_obj *) sync_obj,
 				       DRM_VMW_FENCE_FLAG_EXEC);

 }

 static int vmw_sync_obj_wait(void *sync_obj, bool lazy, bool interruptible)
 {
 	return vmw_fence_obj_wait((struct vmw_fence_obj *) sync_obj,
 				  DRM_VMW_FENCE_FLAG_EXEC,
 				  lazy, interruptible,
 				  VMW_FENCE_WAIT_TIMEOUT);
 }

 struct ttm_bo_driver vmw_bo_driver = {
 	.ttm_tt_create = &vmw_ttm_tt_create,
 	.ttm_tt_populate = &ttm_pool_populate,
 	.ttm_tt_unpopulate = &ttm_pool_unpopulate,
 	.invalidate_caches = vmw_invalidate_caches,
 	.init_mem_type = vmw_init_mem_type,
 	.evict_flags = vmw_evict_flags,
 	.move = NULL,
 	.verify_access = vmw_verify_access,
 	.sync_obj_signaled = vmw_sync_obj_signaled,
 	.sync_obj_wait = vmw_sync_obj_wait,
 	.sync_obj_flush = vmw_sync_obj_flush,
 	.sync_obj_unref = vmw_sync_obj_unref,
 	.sync_obj_ref = vmw_sync_obj_ref,
 	.move_notify = NULL,
 	.swap_notify = NULL,
 	.fault_reserve_notify = &vmw_ttm_fault_reserve_notify,
 	.io_mem_reserve = &vmw_ttm_io_mem_reserve,
 	.io_mem_free = &vmw_ttm_io_mem_free,
 };
	/**************************************************************************
	*
	* Copyright © 2009 VMware, Inc., Palo Alto, CA., 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 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
	* 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.
	*
	**************************************************************************/

	#include "vmwgfx_drv.h"
	#include <drm/ttm/ttm_bo_driver.h>
	#include <drm/ttm/ttm_placement.h>
	#include <drm/ttm/ttm_page_alloc.h>

	static uint32_t vram_placement_flags = TTM_PL_FLAG_VRAM \|
	TTM_PL_FLAG_CACHED;

	static uint32_t vram_ne_placement_flags = TTM_PL_FLAG_VRAM \|
	TTM_PL_FLAG_CACHED \|
	TTM_PL_FLAG_NO_EVICT;

	static uint32_t sys_placement_flags = TTM_PL_FLAG_SYSTEM \|
	TTM_PL_FLAG_CACHED;

	static uint32_t gmr_placement_flags = VMW_PL_FLAG_GMR \|
	TTM_PL_FLAG_CACHED;

	static uint32_t gmr_ne_placement_flags = VMW_PL_FLAG_GMR \|
	TTM_PL_FLAG_CACHED \|
	TTM_PL_FLAG_NO_EVICT;

	struct ttm_placement vmw_vram_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 1,
	.placement = &vram_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &vram_placement_flags
	};

	static uint32_t vram_gmr_placement_flags[] = {
	TTM_PL_FLAG_VRAM \| TTM_PL_FLAG_CACHED,
	VMW_PL_FLAG_GMR \| TTM_PL_FLAG_CACHED
	};

	static uint32_t gmr_vram_placement_flags[] = {
	VMW_PL_FLAG_GMR \| TTM_PL_FLAG_CACHED,
	TTM_PL_FLAG_VRAM \| TTM_PL_FLAG_CACHED
	};

	struct ttm_placement vmw_vram_gmr_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 2,
	.placement = vram_gmr_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &gmr_placement_flags
	};

	static uint32_t vram_gmr_ne_placement_flags[] = {
	TTM_PL_FLAG_VRAM \| TTM_PL_FLAG_CACHED \| TTM_PL_FLAG_NO_EVICT,
	VMW_PL_FLAG_GMR \| TTM_PL_FLAG_CACHED \| TTM_PL_FLAG_NO_EVICT
	};

	struct ttm_placement vmw_vram_gmr_ne_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 2,
	.placement = vram_gmr_ne_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &gmr_ne_placement_flags
	};

	struct ttm_placement vmw_vram_sys_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 1,
	.placement = &vram_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &sys_placement_flags
	};

	struct ttm_placement vmw_vram_ne_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 1,
	.placement = &vram_ne_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &vram_ne_placement_flags
	};

	struct ttm_placement vmw_sys_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 1,
	.placement = &sys_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &sys_placement_flags
	};

	static uint32_t evictable_placement_flags[] = {
	TTM_PL_FLAG_SYSTEM \| TTM_PL_FLAG_CACHED,
	TTM_PL_FLAG_VRAM \| TTM_PL_FLAG_CACHED,
	VMW_PL_FLAG_GMR \| TTM_PL_FLAG_CACHED
	};

	struct ttm_placement vmw_evictable_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 3,
	.placement = evictable_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &sys_placement_flags
	};

	struct ttm_placement vmw_srf_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 1,
	.num_busy_placement = 2,
	.placement = &gmr_placement_flags,
	.busy_placement = gmr_vram_placement_flags
	};

	struct vmw_ttm_tt {
	struct ttm_tt ttm;
	struct vmw_private *dev_priv;
	int gmr_id;
	};

	static int vmw_ttm_bind(struct ttm_tt ttm, struct ttm_mem_reg bo_mem)
	{
	struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);

	vmw_be->gmr_id = bo_mem->start;

	return vmw_gmr_bind(vmw_be->dev_priv, ttm->pages,
	ttm->num_pages, vmw_be->gmr_id);
	}

	static int vmw_ttm_unbind(struct ttm_tt *ttm)
	{
	struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);

	vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
	return 0;
	}

	static void vmw_ttm_destroy(struct ttm_tt *ttm)
	{
	struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);

	ttm_tt_fini(ttm);
	kfree(vmw_be);
	}

	static struct ttm_backend_func vmw_ttm_func = {
	.bind = vmw_ttm_bind,
	.unbind = vmw_ttm_unbind,
	.destroy = vmw_ttm_destroy,
	};

	struct ttm_tt vmw_ttm_tt_create(struct ttm_bo_device bdev,
	unsigned long size, uint32_t page_flags,
	struct page *dummy_read_page)
	{
	struct vmw_ttm_tt *vmw_be;

	vmw_be = kmalloc(sizeof(*vmw_be), GFP_KERNEL);
	if (!vmw_be)
	return NULL;

	vmw_be->ttm.func = &vmw_ttm_func;
	vmw_be->dev_priv = container_of(bdev, struct vmw_private, bdev);

	if (ttm_tt_init(&vmw_be->ttm, bdev, size, page_flags, dummy_read_page)) {
	kfree(vmw_be);
	return NULL;
	}

	return &vmw_be->ttm;
	}

	int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
	{
	return 0;
	}

	int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
	struct ttm_mem_type_manager *man)
	{
	switch (type) {
	case TTM_PL_SYSTEM:
	/* System memory */

	man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
	man->available_caching = TTM_PL_FLAG_CACHED;
	man->default_caching = TTM_PL_FLAG_CACHED;
	break;
	case TTM_PL_VRAM:
	/* "On-card" video ram */
	man->func = &ttm_bo_manager_func;
	man->gpu_offset = 0;
	man->flags = TTM_MEMTYPE_FLAG_FIXED \| TTM_MEMTYPE_FLAG_MAPPABLE;
	man->available_caching = TTM_PL_FLAG_CACHED;
	man->default_caching = TTM_PL_FLAG_CACHED;
	break;
	case VMW_PL_GMR:
	/*
	* "Guest Memory Regions" is an aperture like feature with
	* one slot per bo. There is an upper limit of the number of
	* slots as well as the bo size.
	*/
	man->func = &vmw_gmrid_manager_func;
	man->gpu_offset = 0;
	man->flags = TTM_MEMTYPE_FLAG_CMA \| TTM_MEMTYPE_FLAG_MAPPABLE;
	man->available_caching = TTM_PL_FLAG_CACHED;
	man->default_caching = TTM_PL_FLAG_CACHED;
	break;
	default:
	DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
	return -EINVAL;
	}
	return 0;
	}

	void vmw_evict_flags(struct ttm_buffer_object *bo,
	struct ttm_placement *placement)
	{
	*placement = vmw_sys_placement;
	}

	static int vmw_verify_access(struct ttm_buffer_object bo, struct file filp)
	{
	struct ttm_object_file *tfile =
	vmw_fpriv((struct drm_file *)filp->private_data)->tfile;

	return vmw_user_dmabuf_verify_access(bo, tfile);
	}

	static int vmw_ttm_io_mem_reserve(struct ttm_bo_device bdev, struct ttm_mem_reg mem)
	{
	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
	struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);

	mem->bus.addr = NULL;
	mem->bus.is_iomem = false;
	mem->bus.offset = 0;
	mem->bus.size = mem->num_pages << PAGE_SHIFT;
	mem->bus.base = 0;
	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
	return -EINVAL;
	switch (mem->mem_type) {
	case TTM_PL_SYSTEM:
	case VMW_PL_GMR:
	return 0;
	case TTM_PL_VRAM:
	mem->bus.offset = mem->start << PAGE_SHIFT;
	mem->bus.base = dev_priv->vram_start;
	mem->bus.is_iomem = true;
	break;
	default:
	return -EINVAL;
	}
	return 0;
	}

	static void vmw_ttm_io_mem_free(struct ttm_bo_device bdev, struct ttm_mem_reg mem)
	{
	}

	static int vmw_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
	{
	return 0;
	}

	/**
	* FIXME: We're using the old vmware polling method to sync.
	* Do this with fences instead.
	*/

	static void vmw_sync_obj_ref(void sync_obj)
	{

	return (void *)
	vmw_fence_obj_reference((struct vmw_fence_obj *) sync_obj);
	}

	static void vmw_sync_obj_unref(void **sync_obj)
	{
	vmw_fence_obj_unreference((struct vmw_fence_obj **) sync_obj);
	}

	static int vmw_sync_obj_flush(void *sync_obj)
	{
	vmw_fence_obj_flush((struct vmw_fence_obj *) sync_obj);
	return 0;
	}

	static bool vmw_sync_obj_signaled(void *sync_obj)
	{
	return vmw_fence_obj_signaled((struct vmw_fence_obj *) sync_obj,
	DRM_VMW_FENCE_FLAG_EXEC);

	}

	static int vmw_sync_obj_wait(void *sync_obj, bool lazy, bool interruptible)
	{
	return vmw_fence_obj_wait((struct vmw_fence_obj *) sync_obj,
	DRM_VMW_FENCE_FLAG_EXEC,
	lazy, interruptible,
	VMW_FENCE_WAIT_TIMEOUT);
	}

	struct ttm_bo_driver vmw_bo_driver = {
	.ttm_tt_create = &vmw_ttm_tt_create,
	.ttm_tt_populate = &ttm_pool_populate,
	.ttm_tt_unpopulate = &ttm_pool_unpopulate,
	.invalidate_caches = vmw_invalidate_caches,
	.init_mem_type = vmw_init_mem_type,
	.evict_flags = vmw_evict_flags,
	.move = NULL,
	.verify_access = vmw_verify_access,
	.sync_obj_signaled = vmw_sync_obj_signaled,
	.sync_obj_wait = vmw_sync_obj_wait,
	.sync_obj_flush = vmw_sync_obj_flush,
	.sync_obj_unref = vmw_sync_obj_unref,
	.sync_obj_ref = vmw_sync_obj_ref,
	.move_notify = NULL,
	.swap_notify = NULL,
	.fault_reserve_notify = &vmw_ttm_fault_reserve_notify,
	.io_mem_reserve = &vmw_ttm_io_mem_reserve,
	.io_mem_free = &vmw_ttm_io_mem_free,
	};