drivers/gpu/drm/nouveau/nouveau_ttm.c - arm/linux-arm64-legacy - Git at Google

 /*
  * 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 <subdev/fb.h>
 #include <subdev/vm.h>
 #include <subdev/instmem.h>

 #include "nouveau_drm.h"
 #include "nouveau_ttm.h"
 #include "nouveau_gem.h"

 static int
 nouveau_vram_manager_init(struct ttm_mem_type_manager *man, unsigned long psize)
 {
 	struct nouveau_drm *drm = nouveau_bdev(man->bdev);
 	struct nouveau_fb *pfb = nouveau_fb(drm->device);
 	man->priv = pfb;
 	return 0;
 }

 static int
 nouveau_vram_manager_fini(struct ttm_mem_type_manager *man)
 {
 	man->priv = NULL;
 	return 0;
 }

 static inline void
 nouveau_mem_node_cleanup(struct nouveau_mem *node)
 {
 	if (node->vma[0].node) {
 		nouveau_vm_unmap(&node->vma[0]);
 		nouveau_vm_put(&node->vma[0]);
 	}

 	if (node->vma[1].node) {
 		nouveau_vm_unmap(&node->vma[1]);
 		nouveau_vm_put(&node->vma[1]);
 	}
 }

 static void
 nouveau_vram_manager_del(struct ttm_mem_type_manager *man,
 			 struct ttm_mem_reg *mem)
 {
 	struct nouveau_drm *drm = nouveau_bdev(man->bdev);
 	struct nouveau_fb *pfb = nouveau_fb(drm->device);
 	nouveau_mem_node_cleanup(mem->mm_node);
 	pfb->ram->put(pfb, (struct nouveau_mem **)&mem->mm_node);
 }

 static int
 nouveau_vram_manager_new(struct ttm_mem_type_manager *man,
 			 struct ttm_buffer_object *bo,
 			 struct ttm_placement *placement,
 			 struct ttm_mem_reg *mem)
 {
 	struct nouveau_drm *drm = nouveau_bdev(man->bdev);
 	struct nouveau_fb *pfb = nouveau_fb(drm->device);
 	struct nouveau_bo *nvbo = nouveau_bo(bo);
 	struct nouveau_mem *node;
 	u32 size_nc = 0;
 	int ret;

 	if (nvbo->tile_flags & NOUVEAU_GEM_TILE_NONCONTIG)
 		size_nc = 1 << nvbo->page_shift;

 	ret = pfb->ram->get(pfb, mem->num_pages << PAGE_SHIFT,
 			   mem->page_alignment << PAGE_SHIFT, size_nc,
 			   (nvbo->tile_flags >> 8) & 0x3ff, &node);
 	if (ret) {
 		mem->mm_node = NULL;
 		return (ret == -ENOSPC) ? 0 : ret;
 	}

 	node->page_shift = nvbo->page_shift;

 	mem->mm_node = node;
 	mem->start   = node->offset >> PAGE_SHIFT;
 	return 0;
 }

 static void
 nouveau_vram_manager_debug(struct ttm_mem_type_manager *man, const char *prefix)
 {
 	struct nouveau_fb *pfb = man->priv;
 	struct nouveau_mm *mm = &pfb->vram;
 	struct nouveau_mm_node *r;
 	u32 total = 0, free = 0;

 	mutex_lock(&nv_subdev(pfb)->mutex);
 	list_for_each_entry(r, &mm->nodes, nl_entry) {
 		printk(KERN_DEBUG "%s %d: 0x%010llx 0x%010llx\n",
 		       prefix, r->type, ((u64)r->offset << 12),
 		       (((u64)r->offset + r->length) << 12));

 		total += r->length;
 		if (!r->type)
 			free += r->length;
 	}
 	mutex_unlock(&nv_subdev(pfb)->mutex);

 	printk(KERN_DEBUG "%s  total: 0x%010llx free: 0x%010llx\n",
 	       prefix, (u64)total << 12, (u64)free << 12);
 	printk(KERN_DEBUG "%s  block: 0x%08x\n",
 	       prefix, mm->block_size << 12);
 }

 const struct ttm_mem_type_manager_func nouveau_vram_manager = {
 	nouveau_vram_manager_init,
 	nouveau_vram_manager_fini,
 	nouveau_vram_manager_new,
 	nouveau_vram_manager_del,
 	nouveau_vram_manager_debug
 };

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

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

 static void
 nouveau_gart_manager_del(struct ttm_mem_type_manager *man,
 			 struct ttm_mem_reg *mem)
 {
 	nouveau_mem_node_cleanup(mem->mm_node);
 	kfree(mem->mm_node);
 	mem->mm_node = NULL;
 }

 static int
 nouveau_gart_manager_new(struct ttm_mem_type_manager *man,
 			 struct ttm_buffer_object *bo,
 			 struct ttm_placement *placement,
 			 struct ttm_mem_reg *mem)
 {
 	struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
 	struct nouveau_bo *nvbo = nouveau_bo(bo);
 	struct nouveau_mem *node;

 	node = kzalloc(sizeof(*node), GFP_KERNEL);
 	if (!node)
 		return -ENOMEM;
 	node->page_shift = 12;

 	switch (nv_device(drm->device)->card_type) {
 	case NV_50:
 		if (nv_device(drm->device)->chipset != 0x50)
 			node->memtype = (nvbo->tile_flags & 0x7f00) >> 8;
 		break;
 	case NV_C0:
 	case NV_D0:
 	case NV_E0:
 		node->memtype = (nvbo->tile_flags & 0xff00) >> 8;
 		break;
 	default:
 		break;
 	}

 	mem->mm_node = node;
 	mem->start   = 0;
 	return 0;
 }

 static void
 nouveau_gart_manager_debug(struct ttm_mem_type_manager *man, const char *prefix)
 {
 }

 const struct ttm_mem_type_manager_func nouveau_gart_manager = {
 	nouveau_gart_manager_init,
 	nouveau_gart_manager_fini,
 	nouveau_gart_manager_new,
 	nouveau_gart_manager_del,
 	nouveau_gart_manager_debug
 };

 #include <core/subdev/vm/nv04.h>
 static int
 nv04_gart_manager_init(struct ttm_mem_type_manager *man, unsigned long psize)
 {
 	struct nouveau_drm *drm = nouveau_bdev(man->bdev);
 	struct nouveau_vmmgr *vmm = nouveau_vmmgr(drm->device);
 	struct nv04_vmmgr_priv *priv = (void *)vmm;
 	struct nouveau_vm *vm = NULL;
 	nouveau_vm_ref(priv->vm, &vm, NULL);
 	man->priv = vm;
 	return 0;
 }

 static int
 nv04_gart_manager_fini(struct ttm_mem_type_manager *man)
 {
 	struct nouveau_vm *vm = man->priv;
 	nouveau_vm_ref(NULL, &vm, NULL);
 	man->priv = NULL;
 	return 0;
 }

 static void
 nv04_gart_manager_del(struct ttm_mem_type_manager *man, struct ttm_mem_reg *mem)
 {
 	struct nouveau_mem *node = mem->mm_node;
 	if (node->vma[0].node)
 		nouveau_vm_put(&node->vma[0]);
 	kfree(mem->mm_node);
 	mem->mm_node = NULL;
 }

 static int
 nv04_gart_manager_new(struct ttm_mem_type_manager *man,
 		      struct ttm_buffer_object *bo,
 		      struct ttm_placement *placement,
 		      struct ttm_mem_reg *mem)
 {
 	struct nouveau_mem *node;
 	int ret;

 	node = kzalloc(sizeof(*node), GFP_KERNEL);
 	if (!node)
 		return -ENOMEM;

 	node->page_shift = 12;

 	ret = nouveau_vm_get(man->priv, mem->num_pages << 12, node->page_shift,
 			     NV_MEM_ACCESS_RW, &node->vma[0]);
 	if (ret) {
 		kfree(node);
 		return ret;
 	}

 	mem->mm_node = node;
 	mem->start   = node->vma[0].offset >> PAGE_SHIFT;
 	return 0;
 }

 static void
 nv04_gart_manager_debug(struct ttm_mem_type_manager *man, const char *prefix)
 {
 }

 const struct ttm_mem_type_manager_func nv04_gart_manager = {
 	nv04_gart_manager_init,
 	nv04_gart_manager_fini,
 	nv04_gart_manager_new,
 	nv04_gart_manager_del,
 	nv04_gart_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_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 drm_device *dev = drm->dev;
 	u32 bits;
 	int ret;

 	bits = nouveau_vmmgr(drm->device)->dma_bits;
 	if ( drm->agp.stat == ENABLED ||
 	    !pci_dma_supported(dev->pdev, DMA_BIT_MASK(bits)))
 		bits = 32;

 	ret = pci_set_dma_mask(dev->pdev, DMA_BIT_MASK(bits));
 	if (ret)
 		return ret;

 	ret = pci_set_consistent_dma_mask(dev->pdev, DMA_BIT_MASK(bits));
 	if (ret)
 		pci_set_consistent_dma_mask(dev->pdev, DMA_BIT_MASK(32));

 	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, DRM_FILE_PAGE_OFFSET,
 				  bits <= 32 ? true : false);
 	if (ret) {
 		NV_ERROR(drm, "error initialising bo driver, %d\n", ret);
 		return ret;
 	}

 	/* VRAM init */
 	drm->gem.vram_available  = nouveau_fb(drm->device)->ram->size;
 	drm->gem.vram_available -= nouveau_instmem(drm->device)->reserved;

 	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(pci_resource_start(dev->pdev, 1),
 					 pci_resource_len(dev->pdev, 1));

 	/* GART init */
 	if (drm->agp.stat != ENABLED) {
 		drm->gem.gart_available = nouveau_vmmgr(drm->device)->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)
 {
 	mutex_lock(&drm->dev->struct_mutex);
 	ttm_bo_clean_mm(&drm->ttm.bdev, TTM_PL_VRAM);
 	ttm_bo_clean_mm(&drm->ttm.bdev, TTM_PL_TT);
 	mutex_unlock(&drm->dev->struct_mutex);

 	ttm_bo_device_release(&drm->ttm.bdev);

 	nouveau_ttm_global_release(drm);

 	arch_phys_wc_del(drm->ttm.mtrr);
 	drm->ttm.mtrr = 0;
 }
	/*
	* 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 <subdev/fb.h>
	#include <subdev/vm.h>
	#include <subdev/instmem.h>

	#include "nouveau_drm.h"
	#include "nouveau_ttm.h"
	#include "nouveau_gem.h"

	static int
	nouveau_vram_manager_init(struct ttm_mem_type_manager *man, unsigned long psize)
	{
	struct nouveau_drm *drm = nouveau_bdev(man->bdev);
	struct nouveau_fb *pfb = nouveau_fb(drm->device);
	man->priv = pfb;
	return 0;
	}

	static int
	nouveau_vram_manager_fini(struct ttm_mem_type_manager *man)
	{
	man->priv = NULL;
	return 0;
	}

	static inline void
	nouveau_mem_node_cleanup(struct nouveau_mem *node)
	{
	if (node->vma[0].node) {
	nouveau_vm_unmap(&node->vma[0]);
	nouveau_vm_put(&node->vma[0]);
	}

	if (node->vma[1].node) {
	nouveau_vm_unmap(&node->vma[1]);
	nouveau_vm_put(&node->vma[1]);
	}
	}

	static void
	nouveau_vram_manager_del(struct ttm_mem_type_manager *man,
	struct ttm_mem_reg *mem)
	{
	struct nouveau_drm *drm = nouveau_bdev(man->bdev);
	struct nouveau_fb *pfb = nouveau_fb(drm->device);
	nouveau_mem_node_cleanup(mem->mm_node);
	pfb->ram->put(pfb, (struct nouveau_mem **)&mem->mm_node);
	}

	static int
	nouveau_vram_manager_new(struct ttm_mem_type_manager *man,
	struct ttm_buffer_object *bo,
	struct ttm_placement *placement,
	struct ttm_mem_reg *mem)
	{
	struct nouveau_drm *drm = nouveau_bdev(man->bdev);
	struct nouveau_fb *pfb = nouveau_fb(drm->device);
	struct nouveau_bo *nvbo = nouveau_bo(bo);
	struct nouveau_mem *node;
	u32 size_nc = 0;
	int ret;

	if (nvbo->tile_flags & NOUVEAU_GEM_TILE_NONCONTIG)
	size_nc = 1 << nvbo->page_shift;

	ret = pfb->ram->get(pfb, mem->num_pages << PAGE_SHIFT,
	mem->page_alignment << PAGE_SHIFT, size_nc,
	(nvbo->tile_flags >> 8) & 0x3ff, &node);
	if (ret) {
	mem->mm_node = NULL;
	return (ret == -ENOSPC) ? 0 : ret;
	}

	node->page_shift = nvbo->page_shift;

	mem->mm_node = node;
	mem->start = node->offset >> PAGE_SHIFT;
	return 0;
	}

	static void
	nouveau_vram_manager_debug(struct ttm_mem_type_manager man, const char prefix)
	{
	struct nouveau_fb *pfb = man->priv;
	struct nouveau_mm *mm = &pfb->vram;
	struct nouveau_mm_node *r;
	u32 total = 0, free = 0;

	mutex_lock(&nv_subdev(pfb)->mutex);
	list_for_each_entry(r, &mm->nodes, nl_entry) {
	printk(KERN_DEBUG "%s %d: 0x%010llx 0x%010llx\n",
	prefix, r->type, ((u64)r->offset << 12),
	(((u64)r->offset + r->length) << 12));

	total += r->length;
	if (!r->type)
	free += r->length;
	}
	mutex_unlock(&nv_subdev(pfb)->mutex);

	printk(KERN_DEBUG "%s total: 0x%010llx free: 0x%010llx\n",
	prefix, (u64)total << 12, (u64)free << 12);
	printk(KERN_DEBUG "%s block: 0x%08x\n",
	prefix, mm->block_size << 12);
	}

	const struct ttm_mem_type_manager_func nouveau_vram_manager = {
	nouveau_vram_manager_init,
	nouveau_vram_manager_fini,
	nouveau_vram_manager_new,
	nouveau_vram_manager_del,
	nouveau_vram_manager_debug
	};

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

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

	static void
	nouveau_gart_manager_del(struct ttm_mem_type_manager *man,
	struct ttm_mem_reg *mem)
	{
	nouveau_mem_node_cleanup(mem->mm_node);
	kfree(mem->mm_node);
	mem->mm_node = NULL;
	}

	static int
	nouveau_gart_manager_new(struct ttm_mem_type_manager *man,
	struct ttm_buffer_object *bo,
	struct ttm_placement *placement,
	struct ttm_mem_reg *mem)
	{
	struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
	struct nouveau_bo *nvbo = nouveau_bo(bo);
	struct nouveau_mem *node;

	node = kzalloc(sizeof(*node), GFP_KERNEL);
	if (!node)
	return -ENOMEM;
	node->page_shift = 12;

	switch (nv_device(drm->device)->card_type) {
	case NV_50:
	if (nv_device(drm->device)->chipset != 0x50)
	node->memtype = (nvbo->tile_flags & 0x7f00) >> 8;
	break;
	case NV_C0:
	case NV_D0:
	case NV_E0:
	node->memtype = (nvbo->tile_flags & 0xff00) >> 8;
	break;
	default:
	break;
	}

	mem->mm_node = node;
	mem->start = 0;
	return 0;
	}

	static void
	nouveau_gart_manager_debug(struct ttm_mem_type_manager man, const char prefix)
	{
	}

	const struct ttm_mem_type_manager_func nouveau_gart_manager = {
	nouveau_gart_manager_init,
	nouveau_gart_manager_fini,
	nouveau_gart_manager_new,
	nouveau_gart_manager_del,
	nouveau_gart_manager_debug
	};

	#include <core/subdev/vm/nv04.h>
	static int
	nv04_gart_manager_init(struct ttm_mem_type_manager *man, unsigned long psize)
	{
	struct nouveau_drm *drm = nouveau_bdev(man->bdev);
	struct nouveau_vmmgr *vmm = nouveau_vmmgr(drm->device);
	struct nv04_vmmgr_priv priv = (void )vmm;
	struct nouveau_vm *vm = NULL;
	nouveau_vm_ref(priv->vm, &vm, NULL);
	man->priv = vm;
	return 0;
	}

	static int
	nv04_gart_manager_fini(struct ttm_mem_type_manager *man)
	{
	struct nouveau_vm *vm = man->priv;
	nouveau_vm_ref(NULL, &vm, NULL);
	man->priv = NULL;
	return 0;
	}

	static void
	nv04_gart_manager_del(struct ttm_mem_type_manager man, struct ttm_mem_reg mem)
	{
	struct nouveau_mem *node = mem->mm_node;
	if (node->vma[0].node)
	nouveau_vm_put(&node->vma[0]);
	kfree(mem->mm_node);
	mem->mm_node = NULL;
	}

	static int
	nv04_gart_manager_new(struct ttm_mem_type_manager *man,
	struct ttm_buffer_object *bo,
	struct ttm_placement *placement,
	struct ttm_mem_reg *mem)
	{
	struct nouveau_mem *node;
	int ret;

	node = kzalloc(sizeof(*node), GFP_KERNEL);
	if (!node)
	return -ENOMEM;

	node->page_shift = 12;

	ret = nouveau_vm_get(man->priv, mem->num_pages << 12, node->page_shift,
	NV_MEM_ACCESS_RW, &node->vma[0]);
	if (ret) {
	kfree(node);
	return ret;
	}

	mem->mm_node = node;
	mem->start = node->vma[0].offset >> PAGE_SHIFT;
	return 0;
	}

	static void
	nv04_gart_manager_debug(struct ttm_mem_type_manager man, const char prefix)
	{
	}

	const struct ttm_mem_type_manager_func nv04_gart_manager = {
	nv04_gart_manager_init,
	nv04_gart_manager_fini,
	nv04_gart_manager_new,
	nv04_gart_manager_del,
	nv04_gart_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_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 drm_device *dev = drm->dev;
	u32 bits;
	int ret;

	bits = nouveau_vmmgr(drm->device)->dma_bits;
	if ( drm->agp.stat == ENABLED \|\|
	!pci_dma_supported(dev->pdev, DMA_BIT_MASK(bits)))
	bits = 32;

	ret = pci_set_dma_mask(dev->pdev, DMA_BIT_MASK(bits));
	if (ret)
	return ret;

	ret = pci_set_consistent_dma_mask(dev->pdev, DMA_BIT_MASK(bits));
	if (ret)
	pci_set_consistent_dma_mask(dev->pdev, DMA_BIT_MASK(32));

	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, DRM_FILE_PAGE_OFFSET,
	bits <= 32 ? true : false);
	if (ret) {
	NV_ERROR(drm, "error initialising bo driver, %d\n", ret);
	return ret;
	}

	/* VRAM init */
	drm->gem.vram_available = nouveau_fb(drm->device)->ram->size;
	drm->gem.vram_available -= nouveau_instmem(drm->device)->reserved;

	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(pci_resource_start(dev->pdev, 1),
	pci_resource_len(dev->pdev, 1));

	/* GART init */
	if (drm->agp.stat != ENABLED) {
	drm->gem.gart_available = nouveau_vmmgr(drm->device)->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)
	{
	mutex_lock(&drm->dev->struct_mutex);
	ttm_bo_clean_mm(&drm->ttm.bdev, TTM_PL_VRAM);
	ttm_bo_clean_mm(&drm->ttm.bdev, TTM_PL_TT);
	mutex_unlock(&drm->dev->struct_mutex);

	ttm_bo_device_release(&drm->ttm.bdev);

	nouveau_ttm_global_release(drm);

	arch_phys_wc_del(drm->ttm.mtrr);
	drm->ttm.mtrr = 0;
	}