drivers/gpu/drm/radeon/radeon_object.c - maze/linux - Git at Google

 /*
  * Copyright 2009 Jerome Glisse.
  * 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:
  *    Jerome Glisse <glisse@freedesktop.org>
  *    Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
  *    Dave Airlie
  */
 #include <linux/list.h>
 #include <linux/slab.h>
 #include <drm/drmP.h>
 #include "radeon_drm.h"
 #include "radeon.h"


 int radeon_ttm_init(struct radeon_device *rdev);
 void radeon_ttm_fini(struct radeon_device *rdev);
 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo);

 /*
  * To exclude mutual BO access we rely on bo_reserve exclusion, as all
  * function are calling it.
  */

 static void radeon_ttm_bo_destroy(struct ttm_buffer_object *tbo)
 {
 	struct radeon_bo *bo;

 	bo = container_of(tbo, struct radeon_bo, tbo);
 	mutex_lock(&bo->rdev->gem.mutex);
 	list_del_init(&bo->list);
 	mutex_unlock(&bo->rdev->gem.mutex);
 	radeon_bo_clear_surface_reg(bo);
 	kfree(bo);
 }

 bool radeon_ttm_bo_is_radeon_bo(struct ttm_buffer_object *bo)
 {
 	if (bo->destroy == &radeon_ttm_bo_destroy)
 		return true;
 	return false;
 }

 void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
 {
 	u32 c = 0;

 	rbo->placement.fpfn = 0;
 	rbo->placement.lpfn = 0;
 	rbo->placement.placement = rbo->placements;
 	rbo->placement.busy_placement = rbo->placements;
 	if (domain & RADEON_GEM_DOMAIN_VRAM)
 		rbo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
 					TTM_PL_FLAG_VRAM;
 	if (domain & RADEON_GEM_DOMAIN_GTT)
 		rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
 	if (domain & RADEON_GEM_DOMAIN_CPU)
 		rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 	if (!c)
 		rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 	rbo->placement.num_placement = c;
 	rbo->placement.num_busy_placement = c;
 }

 int radeon_bo_create(struct radeon_device *rdev, struct drm_gem_object *gobj,
 			unsigned long size, bool kernel, u32 domain,
 			struct radeon_bo **bo_ptr)
 {
 	struct radeon_bo *bo;
 	enum ttm_bo_type type;
 	int r;

 	if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
 		rdev->mman.bdev.dev_mapping = rdev->ddev->dev_mapping;
 	}
 	if (kernel) {
 		type = ttm_bo_type_kernel;
 	} else {
 		type = ttm_bo_type_device;
 	}
 	*bo_ptr = NULL;
 	bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
 	if (bo == NULL)
 		return -ENOMEM;
 	bo->rdev = rdev;
 	bo->gobj = gobj;
 	bo->surface_reg = -1;
 	INIT_LIST_HEAD(&bo->list);

 	radeon_ttm_placement_from_domain(bo, domain);
 	/* Kernel allocation are uninterruptible */
 	r = ttm_bo_init(&rdev->mman.bdev, &bo->tbo, size, type,
 			&bo->placement, 0, 0, !kernel, NULL, size,
 			&radeon_ttm_bo_destroy);
 	if (unlikely(r != 0)) {
 		if (r != -ERESTARTSYS)
 			dev_err(rdev->dev,
 				"object_init failed for (%lu, 0x%08X)\n",
 				size, domain);
 		return r;
 	}
 	*bo_ptr = bo;
 	if (gobj) {
 		mutex_lock(&bo->rdev->gem.mutex);
 		list_add_tail(&bo->list, &rdev->gem.objects);
 		mutex_unlock(&bo->rdev->gem.mutex);
 	}
 	return 0;
 }

 int radeon_bo_kmap(struct radeon_bo *bo, void **ptr)
 {
 	bool is_iomem;
 	int r;

 	if (bo->kptr) {
 		if (ptr) {
 			*ptr = bo->kptr;
 		}
 		return 0;
 	}
 	r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
 	if (r) {
 		return r;
 	}
 	bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 	if (ptr) {
 		*ptr = bo->kptr;
 	}
 	radeon_bo_check_tiling(bo, 0, 0);
 	return 0;
 }

 void radeon_bo_kunmap(struct radeon_bo *bo)
 {
 	if (bo->kptr == NULL)
 		return;
 	bo->kptr = NULL;
 	radeon_bo_check_tiling(bo, 0, 0);
 	ttm_bo_kunmap(&bo->kmap);
 }

 void radeon_bo_unref(struct radeon_bo **bo)
 {
 	struct ttm_buffer_object *tbo;

 	if ((*bo) == NULL)
 		return;
 	tbo = &((*bo)->tbo);
 	ttm_bo_unref(&tbo);
 	if (tbo == NULL)
 		*bo = NULL;
 }

 int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr)
 {
 	int r, i;

 	if (bo->pin_count) {
 		bo->pin_count++;
 		if (gpu_addr)
 			*gpu_addr = radeon_bo_gpu_offset(bo);
 		return 0;
 	}
 	radeon_ttm_placement_from_domain(bo, domain);
 	if (domain == RADEON_GEM_DOMAIN_VRAM) {
 		/* force to pin into visible video ram */
 		bo->placement.lpfn = bo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 	}
 	for (i = 0; i < bo->placement.num_placement; i++)
 		bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
 	r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 	if (likely(r == 0)) {
 		bo->pin_count = 1;
 		if (gpu_addr != NULL)
 			*gpu_addr = radeon_bo_gpu_offset(bo);
 	}
 	if (unlikely(r != 0))
 		dev_err(bo->rdev->dev, "%p pin failed\n", bo);
 	return r;
 }

 int radeon_bo_unpin(struct radeon_bo *bo)
 {
 	int r, i;

 	if (!bo->pin_count) {
 		dev_warn(bo->rdev->dev, "%p unpin not necessary\n", bo);
 		return 0;
 	}
 	bo->pin_count--;
 	if (bo->pin_count)
 		return 0;
 	for (i = 0; i < bo->placement.num_placement; i++)
 		bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
 	r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 	if (unlikely(r != 0))
 		dev_err(bo->rdev->dev, "%p validate failed for unpin\n", bo);
 	return r;
 }

 int radeon_bo_evict_vram(struct radeon_device *rdev)
 {
 	/* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
 	if (0 && (rdev->flags & RADEON_IS_IGP)) {
 		if (rdev->mc.igp_sideport_enabled == false)
 			/* Useless to evict on IGP chips */
 			return 0;
 	}
 	return ttm_bo_evict_mm(&rdev->mman.bdev, TTM_PL_VRAM);
 }

 void radeon_bo_force_delete(struct radeon_device *rdev)
 {
 	struct radeon_bo *bo, *n;
 	struct drm_gem_object *gobj;

 	if (list_empty(&rdev->gem.objects)) {
 		return;
 	}
 	dev_err(rdev->dev, "Userspace still has active objects !\n");
 	list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
 		mutex_lock(&rdev->ddev->struct_mutex);
 		gobj = bo->gobj;
 		dev_err(rdev->dev, "%p %p %lu %lu force free\n",
 			gobj, bo, (unsigned long)gobj->size,
 			*((unsigned long *)&gobj->refcount));
 		mutex_lock(&bo->rdev->gem.mutex);
 		list_del_init(&bo->list);
 		mutex_unlock(&bo->rdev->gem.mutex);
 		radeon_bo_unref(&bo);
 		gobj->driver_private = NULL;
 		drm_gem_object_unreference(gobj);
 		mutex_unlock(&rdev->ddev->struct_mutex);
 	}
 }

 int radeon_bo_init(struct radeon_device *rdev)
 {
 	/* Add an MTRR for the VRAM */
 	rdev->mc.vram_mtrr = mtrr_add(rdev->mc.aper_base, rdev->mc.aper_size,
 			MTRR_TYPE_WRCOMB, 1);
 	DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
 		rdev->mc.mc_vram_size >> 20,
 		(unsigned long long)rdev->mc.aper_size >> 20);
 	DRM_INFO("RAM width %dbits %cDR\n",
 			rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S');
 	return radeon_ttm_init(rdev);
 }

 void radeon_bo_fini(struct radeon_device *rdev)
 {
 	radeon_ttm_fini(rdev);
 }

 void radeon_bo_list_add_object(struct radeon_bo_list *lobj,
 				struct list_head *head)
 {
 	if (lobj->wdomain) {
 		list_add(&lobj->list, head);
 	} else {
 		list_add_tail(&lobj->list, head);
 	}
 }

 int radeon_bo_list_reserve(struct list_head *head)
 {
 	struct radeon_bo_list *lobj;
 	int r;

 	list_for_each_entry(lobj, head, list){
 		r = radeon_bo_reserve(lobj->bo, false);
 		if (unlikely(r != 0))
 			return r;
 	}
 	return 0;
 }

 void radeon_bo_list_unreserve(struct list_head *head)
 {
 	struct radeon_bo_list *lobj;

 	list_for_each_entry(lobj, head, list) {
 		/* only unreserve object we successfully reserved */
 		if (radeon_bo_is_reserved(lobj->bo))
 			radeon_bo_unreserve(lobj->bo);
 	}
 }

 int radeon_bo_list_validate(struct list_head *head)
 {
 	struct radeon_bo_list *lobj;
 	struct radeon_bo *bo;
 	int r;

 	r = radeon_bo_list_reserve(head);
 	if (unlikely(r != 0)) {
 		return r;
 	}
 	list_for_each_entry(lobj, head, list) {
 		bo = lobj->bo;
 		if (!bo->pin_count) {
 			if (lobj->wdomain) {
 				radeon_ttm_placement_from_domain(bo,
 								lobj->wdomain);
 			} else {
 				radeon_ttm_placement_from_domain(bo,
 								lobj->rdomain);
 			}
 			r = ttm_bo_validate(&bo->tbo, &bo->placement,
 						true, false);
 			if (unlikely(r))
 				return r;
 		}
 		lobj->gpu_offset = radeon_bo_gpu_offset(bo);
 		lobj->tiling_flags = bo->tiling_flags;
 	}
 	return 0;
 }

 void radeon_bo_list_fence(struct list_head *head, void *fence)
 {
 	struct radeon_bo_list *lobj;
 	struct radeon_bo *bo;
 	struct radeon_fence *old_fence = NULL;

 	list_for_each_entry(lobj, head, list) {
 		bo = lobj->bo;
 		spin_lock(&bo->tbo.lock);
 		old_fence = (struct radeon_fence *)bo->tbo.sync_obj;
 		bo->tbo.sync_obj = radeon_fence_ref(fence);
 		bo->tbo.sync_obj_arg = NULL;
 		spin_unlock(&bo->tbo.lock);
 		if (old_fence) {
 			radeon_fence_unref(&old_fence);
 		}
 	}
 }

 int radeon_bo_fbdev_mmap(struct radeon_bo *bo,
 			     struct vm_area_struct *vma)
 {
 	return ttm_fbdev_mmap(vma, &bo->tbo);
 }

 int radeon_bo_get_surface_reg(struct radeon_bo *bo)
 {
 	struct radeon_device *rdev = bo->rdev;
 	struct radeon_surface_reg *reg;
 	struct radeon_bo *old_object;
 	int steal;
 	int i;

 	BUG_ON(!atomic_read(&bo->tbo.reserved));

 	if (!bo->tiling_flags)
 		return 0;

 	if (bo->surface_reg >= 0) {
 		reg = &rdev->surface_regs[bo->surface_reg];
 		i = bo->surface_reg;
 		goto out;
 	}

 	steal = -1;
 	for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {

 		reg = &rdev->surface_regs[i];
 		if (!reg->bo)
 			break;

 		old_object = reg->bo;
 		if (old_object->pin_count == 0)
 			steal = i;
 	}

 	/* if we are all out */
 	if (i == RADEON_GEM_MAX_SURFACES) {
 		if (steal == -1)
 			return -ENOMEM;
 		/* find someone with a surface reg and nuke their BO */
 		reg = &rdev->surface_regs[steal];
 		old_object = reg->bo;
 		/* blow away the mapping */
 		DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object);
 		ttm_bo_unmap_virtual(&old_object->tbo);
 		old_object->surface_reg = -1;
 		i = steal;
 	}

 	bo->surface_reg = i;
 	reg->bo = bo;

 out:
 	radeon_set_surface_reg(rdev, i, bo->tiling_flags, bo->pitch,
 			       bo->tbo.mem.mm_node->start << PAGE_SHIFT,
 			       bo->tbo.num_pages << PAGE_SHIFT);
 	return 0;
 }

 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo)
 {
 	struct radeon_device *rdev = bo->rdev;
 	struct radeon_surface_reg *reg;

 	if (bo->surface_reg == -1)
 		return;

 	reg = &rdev->surface_regs[bo->surface_reg];
 	radeon_clear_surface_reg(rdev, bo->surface_reg);

 	reg->bo = NULL;
 	bo->surface_reg = -1;
 }

 int radeon_bo_set_tiling_flags(struct radeon_bo *bo,
 				uint32_t tiling_flags, uint32_t pitch)
 {
 	int r;

 	r = radeon_bo_reserve(bo, false);
 	if (unlikely(r != 0))
 		return r;
 	bo->tiling_flags = tiling_flags;
 	bo->pitch = pitch;
 	radeon_bo_unreserve(bo);
 	return 0;
 }

 void radeon_bo_get_tiling_flags(struct radeon_bo *bo,
 				uint32_t *tiling_flags,
 				uint32_t *pitch)
 {
 	BUG_ON(!atomic_read(&bo->tbo.reserved));
 	if (tiling_flags)
 		*tiling_flags = bo->tiling_flags;
 	if (pitch)
 		*pitch = bo->pitch;
 }

 int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved,
 				bool force_drop)
 {
 	BUG_ON(!atomic_read(&bo->tbo.reserved));

 	if (!(bo->tiling_flags & RADEON_TILING_SURFACE))
 		return 0;

 	if (force_drop) {
 		radeon_bo_clear_surface_reg(bo);
 		return 0;
 	}

 	if (bo->tbo.mem.mem_type != TTM_PL_VRAM) {
 		if (!has_moved)
 			return 0;

 		if (bo->surface_reg >= 0)
 			radeon_bo_clear_surface_reg(bo);
 		return 0;
 	}

 	if ((bo->surface_reg >= 0) && !has_moved)
 		return 0;

 	return radeon_bo_get_surface_reg(bo);
 }

 void radeon_bo_move_notify(struct ttm_buffer_object *bo,
 			   struct ttm_mem_reg *mem)
 {
 	struct radeon_bo *rbo;
 	if (!radeon_ttm_bo_is_radeon_bo(bo))
 		return;
 	rbo = container_of(bo, struct radeon_bo, tbo);
 	radeon_bo_check_tiling(rbo, 0, 1);
 }

 void radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
 {
 	struct radeon_bo *rbo;
 	if (!radeon_ttm_bo_is_radeon_bo(bo))
 		return;
 	rbo = container_of(bo, struct radeon_bo, tbo);
 	radeon_bo_check_tiling(rbo, 0, 0);
 }
	/*
	* Copyright 2009 Jerome Glisse.
	* 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:
	* Jerome Glisse <glisse@freedesktop.org>
	* Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
	* Dave Airlie
	*/
	#include <linux/list.h>
	#include <linux/slab.h>
	#include <drm/drmP.h>
	#include "radeon_drm.h"
	#include "radeon.h"


	int radeon_ttm_init(struct radeon_device *rdev);
	void radeon_ttm_fini(struct radeon_device *rdev);
	static void radeon_bo_clear_surface_reg(struct radeon_bo *bo);

	/*
	* To exclude mutual BO access we rely on bo_reserve exclusion, as all
	* function are calling it.
	*/

	static void radeon_ttm_bo_destroy(struct ttm_buffer_object *tbo)
	{
	struct radeon_bo *bo;

	bo = container_of(tbo, struct radeon_bo, tbo);
	mutex_lock(&bo->rdev->gem.mutex);
	list_del_init(&bo->list);
	mutex_unlock(&bo->rdev->gem.mutex);
	radeon_bo_clear_surface_reg(bo);
	kfree(bo);
	}

	bool radeon_ttm_bo_is_radeon_bo(struct ttm_buffer_object *bo)
	{
	if (bo->destroy == &radeon_ttm_bo_destroy)
	return true;
	return false;
	}

	void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
	{
	u32 c = 0;

	rbo->placement.fpfn = 0;
	rbo->placement.lpfn = 0;
	rbo->placement.placement = rbo->placements;
	rbo->placement.busy_placement = rbo->placements;
	if (domain & RADEON_GEM_DOMAIN_VRAM)
	rbo->placements[c++] = TTM_PL_FLAG_WC \| TTM_PL_FLAG_UNCACHED \|
	TTM_PL_FLAG_VRAM;
	if (domain & RADEON_GEM_DOMAIN_GTT)
	rbo->placements[c++] = TTM_PL_MASK_CACHING \| TTM_PL_FLAG_TT;
	if (domain & RADEON_GEM_DOMAIN_CPU)
	rbo->placements[c++] = TTM_PL_MASK_CACHING \| TTM_PL_FLAG_SYSTEM;
	if (!c)
	rbo->placements[c++] = TTM_PL_MASK_CACHING \| TTM_PL_FLAG_SYSTEM;
	rbo->placement.num_placement = c;
	rbo->placement.num_busy_placement = c;
	}

	int radeon_bo_create(struct radeon_device rdev, struct drm_gem_object gobj,
	unsigned long size, bool kernel, u32 domain,
	struct radeon_bo **bo_ptr)
	{
	struct radeon_bo *bo;
	enum ttm_bo_type type;
	int r;

	if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
	rdev->mman.bdev.dev_mapping = rdev->ddev->dev_mapping;
	}
	if (kernel) {
	type = ttm_bo_type_kernel;
	} else {
	type = ttm_bo_type_device;
	}
	*bo_ptr = NULL;
	bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
	if (bo == NULL)
	return -ENOMEM;
	bo->rdev = rdev;
	bo->gobj = gobj;
	bo->surface_reg = -1;
	INIT_LIST_HEAD(&bo->list);

	radeon_ttm_placement_from_domain(bo, domain);
	/* Kernel allocation are uninterruptible */
	r = ttm_bo_init(&rdev->mman.bdev, &bo->tbo, size, type,
	&bo->placement, 0, 0, !kernel, NULL, size,
	&radeon_ttm_bo_destroy);
	if (unlikely(r != 0)) {
	if (r != -ERESTARTSYS)
	dev_err(rdev->dev,
	"object_init failed for (%lu, 0x%08X)\n",
	size, domain);
	return r;
	}
	*bo_ptr = bo;
	if (gobj) {
	mutex_lock(&bo->rdev->gem.mutex);
	list_add_tail(&bo->list, &rdev->gem.objects);
	mutex_unlock(&bo->rdev->gem.mutex);
	}
	return 0;
	}

	int radeon_bo_kmap(struct radeon_bo bo, void *ptr)
	{
	bool is_iomem;
	int r;

	if (bo->kptr) {
	if (ptr) {
	*ptr = bo->kptr;
	}
	return 0;
	}
	r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
	if (r) {
	return r;
	}
	bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
	if (ptr) {
	*ptr = bo->kptr;
	}
	radeon_bo_check_tiling(bo, 0, 0);
	return 0;
	}

	void radeon_bo_kunmap(struct radeon_bo *bo)
	{
	if (bo->kptr == NULL)
	return;
	bo->kptr = NULL;
	radeon_bo_check_tiling(bo, 0, 0);
	ttm_bo_kunmap(&bo->kmap);
	}

	void radeon_bo_unref(struct radeon_bo **bo)
	{
	struct ttm_buffer_object *tbo;

	if ((*bo) == NULL)
	return;
	tbo = &((*bo)->tbo);
	ttm_bo_unref(&tbo);
	if (tbo == NULL)
	*bo = NULL;
	}

	int radeon_bo_pin(struct radeon_bo bo, u32 domain, u64 gpu_addr)
	{
	int r, i;

	if (bo->pin_count) {
	bo->pin_count++;
	if (gpu_addr)
	*gpu_addr = radeon_bo_gpu_offset(bo);
	return 0;
	}
	radeon_ttm_placement_from_domain(bo, domain);
	if (domain == RADEON_GEM_DOMAIN_VRAM) {
	/* force to pin into visible video ram */
	bo->placement.lpfn = bo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
	}
	for (i = 0; i < bo->placement.num_placement; i++)
	bo->placements[i] \|= TTM_PL_FLAG_NO_EVICT;
	r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
	if (likely(r == 0)) {
	bo->pin_count = 1;
	if (gpu_addr != NULL)
	*gpu_addr = radeon_bo_gpu_offset(bo);
	}
	if (unlikely(r != 0))
	dev_err(bo->rdev->dev, "%p pin failed\n", bo);
	return r;
	}

	int radeon_bo_unpin(struct radeon_bo *bo)
	{
	int r, i;

	if (!bo->pin_count) {
	dev_warn(bo->rdev->dev, "%p unpin not necessary\n", bo);
	return 0;
	}
	bo->pin_count--;
	if (bo->pin_count)
	return 0;
	for (i = 0; i < bo->placement.num_placement; i++)
	bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
	r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
	if (unlikely(r != 0))
	dev_err(bo->rdev->dev, "%p validate failed for unpin\n", bo);
	return r;
	}

	int radeon_bo_evict_vram(struct radeon_device *rdev)
	{
	/* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
	if (0 && (rdev->flags & RADEON_IS_IGP)) {
	if (rdev->mc.igp_sideport_enabled == false)
	/* Useless to evict on IGP chips */
	return 0;
	}
	return ttm_bo_evict_mm(&rdev->mman.bdev, TTM_PL_VRAM);
	}

	void radeon_bo_force_delete(struct radeon_device *rdev)
	{
	struct radeon_bo bo, n;
	struct drm_gem_object *gobj;

	if (list_empty(&rdev->gem.objects)) {
	return;
	}
	dev_err(rdev->dev, "Userspace still has active objects !\n");
	list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
	mutex_lock(&rdev->ddev->struct_mutex);
	gobj = bo->gobj;
	dev_err(rdev->dev, "%p %p %lu %lu force free\n",
	gobj, bo, (unsigned long)gobj->size,
	((unsigned long )&gobj->refcount));
	mutex_lock(&bo->rdev->gem.mutex);
	list_del_init(&bo->list);
	mutex_unlock(&bo->rdev->gem.mutex);
	radeon_bo_unref(&bo);
	gobj->driver_private = NULL;
	drm_gem_object_unreference(gobj);
	mutex_unlock(&rdev->ddev->struct_mutex);
	}
	}

	int radeon_bo_init(struct radeon_device *rdev)
	{
	/* Add an MTRR for the VRAM */
	rdev->mc.vram_mtrr = mtrr_add(rdev->mc.aper_base, rdev->mc.aper_size,
	MTRR_TYPE_WRCOMB, 1);
	DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
	rdev->mc.mc_vram_size >> 20,
	(unsigned long long)rdev->mc.aper_size >> 20);
	DRM_INFO("RAM width %dbits %cDR\n",
	rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S');
	return radeon_ttm_init(rdev);
	}

	void radeon_bo_fini(struct radeon_device *rdev)
	{
	radeon_ttm_fini(rdev);
	}

	void radeon_bo_list_add_object(struct radeon_bo_list *lobj,
	struct list_head *head)
	{
	if (lobj->wdomain) {
	list_add(&lobj->list, head);
	} else {
	list_add_tail(&lobj->list, head);
	}
	}

	int radeon_bo_list_reserve(struct list_head *head)
	{
	struct radeon_bo_list *lobj;
	int r;

	list_for_each_entry(lobj, head, list){
	r = radeon_bo_reserve(lobj->bo, false);
	if (unlikely(r != 0))
	return r;
	}
	return 0;
	}

	void radeon_bo_list_unreserve(struct list_head *head)
	{
	struct radeon_bo_list *lobj;

	list_for_each_entry(lobj, head, list) {
	/* only unreserve object we successfully reserved */
	if (radeon_bo_is_reserved(lobj->bo))
	radeon_bo_unreserve(lobj->bo);
	}
	}

	int radeon_bo_list_validate(struct list_head *head)
	{
	struct radeon_bo_list *lobj;
	struct radeon_bo *bo;
	int r;

	r = radeon_bo_list_reserve(head);
	if (unlikely(r != 0)) {
	return r;
	}
	list_for_each_entry(lobj, head, list) {
	bo = lobj->bo;
	if (!bo->pin_count) {
	if (lobj->wdomain) {
	radeon_ttm_placement_from_domain(bo,
	lobj->wdomain);
	} else {
	radeon_ttm_placement_from_domain(bo,
	lobj->rdomain);
	}
	r = ttm_bo_validate(&bo->tbo, &bo->placement,
	true, false);
	if (unlikely(r))
	return r;
	}
	lobj->gpu_offset = radeon_bo_gpu_offset(bo);
	lobj->tiling_flags = bo->tiling_flags;
	}
	return 0;
	}

	void radeon_bo_list_fence(struct list_head head, void fence)
	{
	struct radeon_bo_list *lobj;
	struct radeon_bo *bo;
	struct radeon_fence *old_fence = NULL;

	list_for_each_entry(lobj, head, list) {
	bo = lobj->bo;
	spin_lock(&bo->tbo.lock);
	old_fence = (struct radeon_fence *)bo->tbo.sync_obj;
	bo->tbo.sync_obj = radeon_fence_ref(fence);
	bo->tbo.sync_obj_arg = NULL;
	spin_unlock(&bo->tbo.lock);
	if (old_fence) {
	radeon_fence_unref(&old_fence);
	}
	}
	}

	int radeon_bo_fbdev_mmap(struct radeon_bo *bo,
	struct vm_area_struct *vma)
	{
	return ttm_fbdev_mmap(vma, &bo->tbo);
	}

	int radeon_bo_get_surface_reg(struct radeon_bo *bo)
	{
	struct radeon_device *rdev = bo->rdev;
	struct radeon_surface_reg *reg;
	struct radeon_bo *old_object;
	int steal;
	int i;

	BUG_ON(!atomic_read(&bo->tbo.reserved));

	if (!bo->tiling_flags)
	return 0;

	if (bo->surface_reg >= 0) {
	reg = &rdev->surface_regs[bo->surface_reg];
	i = bo->surface_reg;
	goto out;
	}

	steal = -1;
	for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {

	reg = &rdev->surface_regs[i];
	if (!reg->bo)
	break;

	old_object = reg->bo;
	if (old_object->pin_count == 0)
	steal = i;
	}

	/* if we are all out */
	if (i == RADEON_GEM_MAX_SURFACES) {
	if (steal == -1)
	return -ENOMEM;
	/* find someone with a surface reg and nuke their BO */
	reg = &rdev->surface_regs[steal];
	old_object = reg->bo;
	/* blow away the mapping */
	DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object);
	ttm_bo_unmap_virtual(&old_object->tbo);
	old_object->surface_reg = -1;
	i = steal;
	}

	bo->surface_reg = i;
	reg->bo = bo;

	out:
	radeon_set_surface_reg(rdev, i, bo->tiling_flags, bo->pitch,
	bo->tbo.mem.mm_node->start << PAGE_SHIFT,
	bo->tbo.num_pages << PAGE_SHIFT);
	return 0;
	}

	static void radeon_bo_clear_surface_reg(struct radeon_bo *bo)
	{
	struct radeon_device *rdev = bo->rdev;
	struct radeon_surface_reg *reg;

	if (bo->surface_reg == -1)
	return;

	reg = &rdev->surface_regs[bo->surface_reg];
	radeon_clear_surface_reg(rdev, bo->surface_reg);

	reg->bo = NULL;
	bo->surface_reg = -1;
	}

	int radeon_bo_set_tiling_flags(struct radeon_bo *bo,
	uint32_t tiling_flags, uint32_t pitch)
	{
	int r;

	r = radeon_bo_reserve(bo, false);
	if (unlikely(r != 0))
	return r;
	bo->tiling_flags = tiling_flags;
	bo->pitch = pitch;
	radeon_bo_unreserve(bo);
	return 0;
	}

	void radeon_bo_get_tiling_flags(struct radeon_bo *bo,
	uint32_t *tiling_flags,
	uint32_t *pitch)
	{
	BUG_ON(!atomic_read(&bo->tbo.reserved));
	if (tiling_flags)
	*tiling_flags = bo->tiling_flags;
	if (pitch)
	*pitch = bo->pitch;
	}

	int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved,
	bool force_drop)
	{
	BUG_ON(!atomic_read(&bo->tbo.reserved));

	if (!(bo->tiling_flags & RADEON_TILING_SURFACE))
	return 0;

	if (force_drop) {
	radeon_bo_clear_surface_reg(bo);
	return 0;
	}

	if (bo->tbo.mem.mem_type != TTM_PL_VRAM) {
	if (!has_moved)
	return 0;

	if (bo->surface_reg >= 0)
	radeon_bo_clear_surface_reg(bo);
	return 0;
	}

	if ((bo->surface_reg >= 0) && !has_moved)
	return 0;

	return radeon_bo_get_surface_reg(bo);
	}

	void radeon_bo_move_notify(struct ttm_buffer_object *bo,
	struct ttm_mem_reg *mem)
	{
	struct radeon_bo *rbo;
	if (!radeon_ttm_bo_is_radeon_bo(bo))
	return;
	rbo = container_of(bo, struct radeon_bo, tbo);
	radeon_bo_check_tiling(rbo, 0, 1);
	}

	void radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
	{
	struct radeon_bo *rbo;
	if (!radeon_ttm_bo_is_radeon_bo(bo))
	return;
	rbo = container_of(bo, struct radeon_bo, tbo);
	radeon_bo_check_tiling(rbo, 0, 0);
	}