drivers/gpu/drm/nouveau/nouveau_ttm.c - kernel/msm-4.19 - Gitiles

 /*
  * Copyright (c) 2007-2008 Tungsten Graphics, Inc., Cedar Park, TX., USA,
  * All Rights Reserved.
  * Copyright (c) 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 "nouveau_drv.h"
 #include "nouveau_gem.h"
 #include "nouveau_mem.h"
 #include "nouveau_ttm.h"

 #include <drm/drm_legacy.h>

 #include <core/tegra.h>

 static int
 nouveau_manager_init(struct ttm_mem_type_manager *man, unsigned long psize)
 {
 	return 0;
 }

 static int
 nouveau_manager_fini(struct ttm_mem_type_manager *man)
 {
 	return 0;
 }

 static void
 nouveau_manager_del(struct ttm_mem_type_manager *man, struct ttm_mem_reg *reg)
 {
 	nouveau_mem_del(reg);
 }

 static void
 nouveau_manager_debug(struct ttm_mem_type_manager *man,
 		      struct drm_printer *printer)
 {
 }

 static int
 nouveau_vram_manager_new(struct ttm_mem_type_manager *man,
 			 struct ttm_buffer_object *bo,
 			 const struct ttm_place *place,
 			 struct ttm_mem_reg *reg)
 {
 	struct nouveau_bo *nvbo = nouveau_bo(bo);
 	struct nouveau_drm *drm = nvbo->cli->drm;
 	struct nouveau_mem *mem;
 	int ret;

 	if (drm->client.device.info.ram_size == 0)
 		return -ENOMEM;

 	ret = nouveau_mem_new(&drm->master, nvbo->kind, nvbo->comp, reg);
 	mem = nouveau_mem(reg);
 	if (ret)
 		return ret;

 	ret = nouveau_mem_vram(reg, nvbo->contig, nvbo->page);
 	if (ret) {
 		nouveau_mem_del(reg);
 		if (ret == -ENOSPC) {
 			reg->mm_node = NULL;
 			return 0;
 		}
 		return ret;
 	}

 	return 0;
 }

 const struct ttm_mem_type_manager_func nouveau_vram_manager = {
 	.init = nouveau_manager_init,
 	.takedown = nouveau_manager_fini,
 	.get_node = nouveau_vram_manager_new,
 	.put_node = nouveau_manager_del,
 	.debug = nouveau_manager_debug,
 };

 static int
 nouveau_gart_manager_new(struct ttm_mem_type_manager *man,
 			 struct ttm_buffer_object *bo,
 			 const struct ttm_place *place,
 			 struct ttm_mem_reg *reg)
 {
 	struct nouveau_bo *nvbo = nouveau_bo(bo);
 	struct nouveau_drm *drm = nvbo->cli->drm;
 	struct nouveau_mem *mem;
 	int ret;

 	ret = nouveau_mem_new(&drm->master, nvbo->kind, nvbo->comp, reg);
 	mem = nouveau_mem(reg);
 	if (ret)
 		return ret;

 	reg->start = 0;
 	return 0;
 }

 const struct ttm_mem_type_manager_func nouveau_gart_manager = {
 	.init = nouveau_manager_init,
 	.takedown = nouveau_manager_fini,
 	.get_node = nouveau_gart_manager_new,
 	.put_node = nouveau_manager_del,
 	.debug = nouveau_manager_debug
 };

 static int
 nv04_gart_manager_new(struct ttm_mem_type_manager *man,
 		      struct ttm_buffer_object *bo,
 		      const struct ttm_place *place,
 		      struct ttm_mem_reg *reg)
 {
 	struct nouveau_bo *nvbo = nouveau_bo(bo);
 	struct nouveau_drm *drm = nvbo->cli->drm;
 	struct nouveau_mem *mem;
 	int ret;

 	ret = nouveau_mem_new(&drm->master, nvbo->kind, nvbo->comp, reg);
 	mem = nouveau_mem(reg);
 	if (ret)
 		return ret;

 	ret = nvif_vmm_get(&mem->cli->vmm.vmm, PTES, false, 12, 0,
 			   reg->num_pages << PAGE_SHIFT, &mem->vma[0]);
 	if (ret) {
 		nouveau_mem_del(reg);
 		if (ret == -ENOSPC) {
 			reg->mm_node = NULL;
 			return 0;
 		}
 		return ret;
 	}

 	reg->start = mem->vma[0].addr >> PAGE_SHIFT;
 	return 0;
 }

 const struct ttm_mem_type_manager_func nv04_gart_manager = {
 	.init = nouveau_manager_init,
 	.takedown = nouveau_manager_fini,
 	.get_node = nv04_gart_manager_new,
 	.put_node = nouveau_manager_del,
 	.debug = nouveau_manager_debug
 };

 int
 nouveau_ttm_mmap(struct file *filp, struct vm_area_struct *vma)
 {
 	struct drm_file *file_priv = filp->private_data;
 	struct nouveau_drm *drm = nouveau_drm(file_priv->minor->dev);

 	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
 		return drm_legacy_mmap(filp, vma);

 	return ttm_bo_mmap(filp, vma, &drm->ttm.bdev);
 }

 static int
 nouveau_ttm_mem_global_init(struct drm_global_reference *ref)
 {
 	return ttm_mem_global_init(ref->object);
 }

 static void
 nouveau_ttm_mem_global_release(struct drm_global_reference *ref)
 {
 	ttm_mem_global_release(ref->object);
 }

 int
 nouveau_ttm_global_init(struct nouveau_drm *drm)
 {
 	struct drm_global_reference *global_ref;
 	int ret;

 	global_ref = &drm->ttm.mem_global_ref;
 	global_ref->global_type = DRM_GLOBAL_TTM_MEM;
 	global_ref->size = sizeof(struct ttm_mem_global);
 	global_ref->init = &nouveau_ttm_mem_global_init;
 	global_ref->release = &nouveau_ttm_mem_global_release;

 	ret = drm_global_item_ref(global_ref);
 	if (unlikely(ret != 0)) {
 		DRM_ERROR("Failed setting up TTM memory accounting\n");
 		drm->ttm.mem_global_ref.release = NULL;
 		return ret;
 	}

 	drm->ttm.bo_global_ref.mem_glob = global_ref->object;
 	global_ref = &drm->ttm.bo_global_ref.ref;
 	global_ref->global_type = DRM_GLOBAL_TTM_BO;
 	global_ref->size = sizeof(struct ttm_bo_global);
 	global_ref->init = &ttm_bo_global_init;
 	global_ref->release = &ttm_bo_global_release;

 	ret = drm_global_item_ref(global_ref);
 	if (unlikely(ret != 0)) {
 		DRM_ERROR("Failed setting up TTM BO subsystem\n");
 		drm_global_item_unref(&drm->ttm.mem_global_ref);
 		drm->ttm.mem_global_ref.release = NULL;
 		return ret;
 	}

 	return 0;
 }

 void
 nouveau_ttm_global_release(struct nouveau_drm *drm)
 {
 	if (drm->ttm.mem_global_ref.release == NULL)
 		return;

 	drm_global_item_unref(&drm->ttm.bo_global_ref.ref);
 	drm_global_item_unref(&drm->ttm.mem_global_ref);
 	drm->ttm.mem_global_ref.release = NULL;
 }

 int
 nouveau_ttm_init(struct nouveau_drm *drm)
 {
 	struct nvkm_device *device = nvxx_device(&drm->client.device);
 	struct nvkm_pci *pci = device->pci;
 	struct nvif_mmu *mmu = &drm->client.mmu;
 	struct drm_device *dev = drm->dev;
 	int typei, ret;

 	typei = nvif_mmu_type(mmu, NVIF_MEM_HOST | NVIF_MEM_MAPPABLE |
 						   NVIF_MEM_COHERENT);
 	if (typei < 0)
 		return -ENOSYS;

 	drm->ttm.type_host = typei;

 	typei = nvif_mmu_type(mmu, NVIF_MEM_HOST | NVIF_MEM_MAPPABLE);
 	if (typei < 0)
 		return -ENOSYS;

 	drm->ttm.type_ncoh = typei;

 	if (drm->client.device.info.platform != NV_DEVICE_INFO_V0_SOC &&
 	    drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
 		typei = nvif_mmu_type(mmu, NVIF_MEM_VRAM | NVIF_MEM_MAPPABLE |
 					   NVIF_MEM_KIND |
 					   NVIF_MEM_COMP |
 					   NVIF_MEM_DISP);
 		if (typei < 0)
 			return -ENOSYS;

 		drm->ttm.type_vram = typei;
 	} else {
 		drm->ttm.type_vram = -1;
 	}

 	if (pci && pci->agp.bridge) {
 		drm->agp.bridge = pci->agp.bridge;
 		drm->agp.base = pci->agp.base;
 		drm->agp.size = pci->agp.size;
 		drm->agp.cma = pci->agp.cma;
 	}

 	ret = nouveau_ttm_global_init(drm);
 	if (ret)
 		return ret;

 	ret = ttm_bo_device_init(&drm->ttm.bdev,
 				  drm->ttm.bo_global_ref.ref.object,
 				  &nouveau_bo_driver,
 				  dev->anon_inode->i_mapping,
 				  DRM_FILE_PAGE_OFFSET,
 				  drm->client.mmu.dmabits <= 32 ? true : false);
 	if (ret) {
 		NV_ERROR(drm, "error initialising bo driver, %d\n", ret);
 		return ret;
 	}

 	/* VRAM init */
 	drm->gem.vram_available = drm->client.device.info.ram_user;

 	arch_io_reserve_memtype_wc(device->func->resource_addr(device, 1),
 				   device->func->resource_size(device, 1));

 	ret = ttm_bo_init_mm(&drm->ttm.bdev, TTM_PL_VRAM,
 			      drm->gem.vram_available >> PAGE_SHIFT);
 	if (ret) {
 		NV_ERROR(drm, "VRAM mm init failed, %d\n", ret);
 		return ret;
 	}

 	drm->ttm.mtrr = arch_phys_wc_add(device->func->resource_addr(device, 1),
 					 device->func->resource_size(device, 1));

 	/* GART init */
 	if (!drm->agp.bridge) {
 		drm->gem.gart_available = drm->client.vmm.vmm.limit;
 	} else {
 		drm->gem.gart_available = drm->agp.size;
 	}

 	ret = ttm_bo_init_mm(&drm->ttm.bdev, TTM_PL_TT,
 			      drm->gem.gart_available >> PAGE_SHIFT);
 	if (ret) {
 		NV_ERROR(drm, "GART mm init failed, %d\n", ret);
 		return ret;
 	}

 	NV_INFO(drm, "VRAM: %d MiB\n", (u32)(drm->gem.vram_available >> 20));
 	NV_INFO(drm, "GART: %d MiB\n", (u32)(drm->gem.gart_available >> 20));
 	return 0;
 }

 void
 nouveau_ttm_fini(struct nouveau_drm *drm)
 {
 	struct nvkm_device *device = nvxx_device(&drm->client.device);

 	ttm_bo_clean_mm(&drm->ttm.bdev, TTM_PL_VRAM);
 	ttm_bo_clean_mm(&drm->ttm.bdev, TTM_PL_TT);

 	ttm_bo_device_release(&drm->ttm.bdev);

 	nouveau_ttm_global_release(drm);

 	arch_phys_wc_del(drm->ttm.mtrr);
 	drm->ttm.mtrr = 0;
 	arch_io_free_memtype_wc(device->func->resource_addr(device, 1),
 				device->func->resource_size(device, 1));

 }
	/*
	* Copyright (c) 2007-2008 Tungsten Graphics, Inc., Cedar Park, TX., USA,
	* All Rights Reserved.
	* Copyright (c) 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 "nouveau_drv.h"
	#include "nouveau_gem.h"
	#include "nouveau_mem.h"
	#include "nouveau_ttm.h"

	#include <drm/drm_legacy.h>

	#include <core/tegra.h>

	static int
	nouveau_manager_init(struct ttm_mem_type_manager *man, unsigned long psize)
	{
	return 0;
	}

	static int
	nouveau_manager_fini(struct ttm_mem_type_manager *man)
	{
	return 0;
	}

	static void
	nouveau_manager_del(struct ttm_mem_type_manager man, struct ttm_mem_reg reg)
	{
	nouveau_mem_del(reg);
	}

	static void
	nouveau_manager_debug(struct ttm_mem_type_manager *man,
	struct drm_printer *printer)
	{
	}

	static int
	nouveau_vram_manager_new(struct ttm_mem_type_manager *man,
	struct ttm_buffer_object *bo,
	const struct ttm_place *place,
	struct ttm_mem_reg *reg)
	{
	struct nouveau_bo *nvbo = nouveau_bo(bo);
	struct nouveau_drm *drm = nvbo->cli->drm;
	struct nouveau_mem *mem;
	int ret;

	if (drm->client.device.info.ram_size == 0)
	return -ENOMEM;

	ret = nouveau_mem_new(&drm->master, nvbo->kind, nvbo->comp, reg);
	mem = nouveau_mem(reg);
	if (ret)
	return ret;

	ret = nouveau_mem_vram(reg, nvbo->contig, nvbo->page);
	if (ret) {
	nouveau_mem_del(reg);
	if (ret == -ENOSPC) {
	reg->mm_node = NULL;
	return 0;
	}
	return ret;
	}

	return 0;
	}

	const struct ttm_mem_type_manager_func nouveau_vram_manager = {
	.init = nouveau_manager_init,
	.takedown = nouveau_manager_fini,
	.get_node = nouveau_vram_manager_new,
	.put_node = nouveau_manager_del,
	.debug = nouveau_manager_debug,
	};

	static int
	nouveau_gart_manager_new(struct ttm_mem_type_manager *man,
	struct ttm_buffer_object *bo,
	const struct ttm_place *place,
	struct ttm_mem_reg *reg)
	{
	struct nouveau_bo *nvbo = nouveau_bo(bo);
	struct nouveau_drm *drm = nvbo->cli->drm;
	struct nouveau_mem *mem;
	int ret;

	ret = nouveau_mem_new(&drm->master, nvbo->kind, nvbo->comp, reg);
	mem = nouveau_mem(reg);
	if (ret)
	return ret;

	reg->start = 0;
	return 0;
	}

	const struct ttm_mem_type_manager_func nouveau_gart_manager = {
	.init = nouveau_manager_init,
	.takedown = nouveau_manager_fini,
	.get_node = nouveau_gart_manager_new,
	.put_node = nouveau_manager_del,
	.debug = nouveau_manager_debug
	};

	static int
	nv04_gart_manager_new(struct ttm_mem_type_manager *man,
	struct ttm_buffer_object *bo,
	const struct ttm_place *place,
	struct ttm_mem_reg *reg)
	{
	struct nouveau_bo *nvbo = nouveau_bo(bo);
	struct nouveau_drm *drm = nvbo->cli->drm;
	struct nouveau_mem *mem;
	int ret;

	ret = nouveau_mem_new(&drm->master, nvbo->kind, nvbo->comp, reg);
	mem = nouveau_mem(reg);
	if (ret)
	return ret;

	ret = nvif_vmm_get(&mem->cli->vmm.vmm, PTES, false, 12, 0,
	reg->num_pages << PAGE_SHIFT, &mem->vma[0]);
	if (ret) {
	nouveau_mem_del(reg);
	if (ret == -ENOSPC) {
	reg->mm_node = NULL;
	return 0;
	}
	return ret;
	}

	reg->start = mem->vma[0].addr >> PAGE_SHIFT;
	return 0;
	}

	const struct ttm_mem_type_manager_func nv04_gart_manager = {
	.init = nouveau_manager_init,
	.takedown = nouveau_manager_fini,
	.get_node = nv04_gart_manager_new,
	.put_node = nouveau_manager_del,
	.debug = nouveau_manager_debug
	};

	int
	nouveau_ttm_mmap(struct file filp, struct vm_area_struct vma)
	{
	struct drm_file *file_priv = filp->private_data;
	struct nouveau_drm *drm = nouveau_drm(file_priv->minor->dev);

	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
	return drm_legacy_mmap(filp, vma);

	return ttm_bo_mmap(filp, vma, &drm->ttm.bdev);
	}

	static int
	nouveau_ttm_mem_global_init(struct drm_global_reference *ref)
	{
	return ttm_mem_global_init(ref->object);
	}

	static void
	nouveau_ttm_mem_global_release(struct drm_global_reference *ref)
	{
	ttm_mem_global_release(ref->object);
	}

	int
	nouveau_ttm_global_init(struct nouveau_drm *drm)
	{
	struct drm_global_reference *global_ref;
	int ret;

	global_ref = &drm->ttm.mem_global_ref;
	global_ref->global_type = DRM_GLOBAL_TTM_MEM;
	global_ref->size = sizeof(struct ttm_mem_global);
	global_ref->init = &nouveau_ttm_mem_global_init;
	global_ref->release = &nouveau_ttm_mem_global_release;

	ret = drm_global_item_ref(global_ref);
	if (unlikely(ret != 0)) {
	DRM_ERROR("Failed setting up TTM memory accounting\n");
	drm->ttm.mem_global_ref.release = NULL;
	return ret;
	}

	drm->ttm.bo_global_ref.mem_glob = global_ref->object;
	global_ref = &drm->ttm.bo_global_ref.ref;
	global_ref->global_type = DRM_GLOBAL_TTM_BO;
	global_ref->size = sizeof(struct ttm_bo_global);
	global_ref->init = &ttm_bo_global_init;
	global_ref->release = &ttm_bo_global_release;

	ret = drm_global_item_ref(global_ref);
	if (unlikely(ret != 0)) {
	DRM_ERROR("Failed setting up TTM BO subsystem\n");
	drm_global_item_unref(&drm->ttm.mem_global_ref);
	drm->ttm.mem_global_ref.release = NULL;
	return ret;
	}

	return 0;
	}

	void
	nouveau_ttm_global_release(struct nouveau_drm *drm)
	{
	if (drm->ttm.mem_global_ref.release == NULL)
	return;

	drm_global_item_unref(&drm->ttm.bo_global_ref.ref);
	drm_global_item_unref(&drm->ttm.mem_global_ref);
	drm->ttm.mem_global_ref.release = NULL;
	}

	int
	nouveau_ttm_init(struct nouveau_drm *drm)
	{
	struct nvkm_device *device = nvxx_device(&drm->client.device);
	struct nvkm_pci *pci = device->pci;
	struct nvif_mmu *mmu = &drm->client.mmu;
	struct drm_device *dev = drm->dev;
	int typei, ret;

	typei = nvif_mmu_type(mmu, NVIF_MEM_HOST \| NVIF_MEM_MAPPABLE \|
	NVIF_MEM_COHERENT);
	if (typei < 0)
	return -ENOSYS;

	drm->ttm.type_host = typei;

	typei = nvif_mmu_type(mmu, NVIF_MEM_HOST \| NVIF_MEM_MAPPABLE);
	if (typei < 0)
	return -ENOSYS;

	drm->ttm.type_ncoh = typei;

	if (drm->client.device.info.platform != NV_DEVICE_INFO_V0_SOC &&
	drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
	typei = nvif_mmu_type(mmu, NVIF_MEM_VRAM \| NVIF_MEM_MAPPABLE \|
	NVIF_MEM_KIND \|
	NVIF_MEM_COMP \|
	NVIF_MEM_DISP);
	if (typei < 0)
	return -ENOSYS;

	drm->ttm.type_vram = typei;
	} else {
	drm->ttm.type_vram = -1;
	}

	if (pci && pci->agp.bridge) {
	drm->agp.bridge = pci->agp.bridge;
	drm->agp.base = pci->agp.base;
	drm->agp.size = pci->agp.size;
	drm->agp.cma = pci->agp.cma;
	}

	ret = nouveau_ttm_global_init(drm);
	if (ret)
	return ret;

	ret = ttm_bo_device_init(&drm->ttm.bdev,
	drm->ttm.bo_global_ref.ref.object,
	&nouveau_bo_driver,
	dev->anon_inode->i_mapping,
	DRM_FILE_PAGE_OFFSET,
	drm->client.mmu.dmabits <= 32 ? true : false);
	if (ret) {
	NV_ERROR(drm, "error initialising bo driver, %d\n", ret);
	return ret;
	}

	/* VRAM init */
	drm->gem.vram_available = drm->client.device.info.ram_user;

	arch_io_reserve_memtype_wc(device->func->resource_addr(device, 1),
	device->func->resource_size(device, 1));

	ret = ttm_bo_init_mm(&drm->ttm.bdev, TTM_PL_VRAM,
	drm->gem.vram_available >> PAGE_SHIFT);
	if (ret) {
	NV_ERROR(drm, "VRAM mm init failed, %d\n", ret);
	return ret;
	}

	drm->ttm.mtrr = arch_phys_wc_add(device->func->resource_addr(device, 1),
	device->func->resource_size(device, 1));

	/* GART init */
	if (!drm->agp.bridge) {
	drm->gem.gart_available = drm->client.vmm.vmm.limit;
	} else {
	drm->gem.gart_available = drm->agp.size;
	}

	ret = ttm_bo_init_mm(&drm->ttm.bdev, TTM_PL_TT,
	drm->gem.gart_available >> PAGE_SHIFT);
	if (ret) {
	NV_ERROR(drm, "GART mm init failed, %d\n", ret);
	return ret;
	}

	NV_INFO(drm, "VRAM: %d MiB\n", (u32)(drm->gem.vram_available >> 20));
	NV_INFO(drm, "GART: %d MiB\n", (u32)(drm->gem.gart_available >> 20));
	return 0;
	}

	void
	nouveau_ttm_fini(struct nouveau_drm *drm)
	{
	struct nvkm_device *device = nvxx_device(&drm->client.device);

	ttm_bo_clean_mm(&drm->ttm.bdev, TTM_PL_VRAM);
	ttm_bo_clean_mm(&drm->ttm.bdev, TTM_PL_TT);

	ttm_bo_device_release(&drm->ttm.bdev);

	nouveau_ttm_global_release(drm);

	arch_phys_wc_del(drm->ttm.mtrr);
	drm->ttm.mtrr = 0;
	arch_io_free_memtype_wc(device->func->resource_addr(device, 1),
	device->func->resource_size(device, 1));

	}