drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c - kernel/msm-4.19 - Gitiles

 /*
  * Copyright 2008 Advanced Micro Devices, Inc.
  * Copyright 2008 Red Hat Inc.
  * Copyright 2009 Jerome Glisse.
  *
  * 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, sublicense,
  * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
  *
  * Authors: Dave Airlie
  *          Alex Deucher
  *          Jerome Glisse
  */
 #include <linux/ktime.h>
 #include <drm/drmP.h>
 #include <drm/amdgpu_drm.h>
 #include "amdgpu.h"

 void amdgpu_gem_object_free(struct drm_gem_object *gobj)
 {
 	struct amdgpu_bo *robj = gem_to_amdgpu_bo(gobj);

 	if (robj) {
 		if (robj->gem_base.import_attach)
 			drm_prime_gem_destroy(&robj->gem_base, robj->tbo.sg);
 		amdgpu_mn_unregister(robj);
 		amdgpu_bo_unref(&robj);
 	}
 }

 int amdgpu_gem_object_create(struct amdgpu_device *adev, unsigned long size,
 				int alignment, u32 initial_domain,
 				u64 flags, bool kernel,
 				struct drm_gem_object **obj)
 {
 	struct amdgpu_bo *robj;
 	unsigned long max_size;
 	int r;

 	*obj = NULL;
 	/* At least align on page size */
 	if (alignment < PAGE_SIZE) {
 		alignment = PAGE_SIZE;
 	}

 	if (!(initial_domain & (AMDGPU_GEM_DOMAIN_GDS | AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA))) {
 		/* Maximum bo size is the unpinned gtt size since we use the gtt to
 		 * handle vram to system pool migrations.
 		 */
 		max_size = adev->mc.gtt_size - adev->gart_pin_size;
 		if (size > max_size) {
 			DRM_DEBUG("Allocation size %ldMb bigger than %ldMb limit\n",
 				  size >> 20, max_size >> 20);
 			return -ENOMEM;
 		}
 	}
 retry:
 	r = amdgpu_bo_create(adev, size, alignment, kernel, initial_domain,
 			     flags, NULL, NULL, &robj);
 	if (r) {
 		if (r != -ERESTARTSYS) {
 			if (initial_domain == AMDGPU_GEM_DOMAIN_VRAM) {
 				initial_domain |= AMDGPU_GEM_DOMAIN_GTT;
 				goto retry;
 			}
 			DRM_ERROR("Failed to allocate GEM object (%ld, %d, %u, %d)\n",
 				  size, initial_domain, alignment, r);
 		}
 		return r;
 	}
 	*obj = &robj->gem_base;
 	robj->pid = task_pid_nr(current);

 	mutex_lock(&adev->gem.mutex);
 	list_add_tail(&robj->list, &adev->gem.objects);
 	mutex_unlock(&adev->gem.mutex);

 	return 0;
 }

 int amdgpu_gem_init(struct amdgpu_device *adev)
 {
 	INIT_LIST_HEAD(&adev->gem.objects);
 	return 0;
 }

 void amdgpu_gem_fini(struct amdgpu_device *adev)
 {
 	amdgpu_bo_force_delete(adev);
 }

 /*
  * Call from drm_gem_handle_create which appear in both new and open ioctl
  * case.
  */
 int amdgpu_gem_object_open(struct drm_gem_object *obj, struct drm_file *file_priv)
 {
 	struct amdgpu_bo *rbo = gem_to_amdgpu_bo(obj);
 	struct amdgpu_device *adev = rbo->adev;
 	struct amdgpu_fpriv *fpriv = file_priv->driver_priv;
 	struct amdgpu_vm *vm = &fpriv->vm;
 	struct amdgpu_bo_va *bo_va;
 	int r;
 	r = amdgpu_bo_reserve(rbo, false);
 	if (r)
 		return r;

 	bo_va = amdgpu_vm_bo_find(vm, rbo);
 	if (!bo_va) {
 		bo_va = amdgpu_vm_bo_add(adev, vm, rbo);
 	} else {
 		++bo_va->ref_count;
 	}
 	amdgpu_bo_unreserve(rbo);
 	return 0;
 }

 void amdgpu_gem_object_close(struct drm_gem_object *obj,
 			     struct drm_file *file_priv)
 {
 	struct amdgpu_bo *rbo = gem_to_amdgpu_bo(obj);
 	struct amdgpu_device *adev = rbo->adev;
 	struct amdgpu_fpriv *fpriv = file_priv->driver_priv;
 	struct amdgpu_vm *vm = &fpriv->vm;
 	struct amdgpu_bo_va *bo_va;
 	int r;
 	r = amdgpu_bo_reserve(rbo, true);
 	if (r) {
 		dev_err(adev->dev, "leaking bo va because "
 			"we fail to reserve bo (%d)\n", r);
 		return;
 	}
 	bo_va = amdgpu_vm_bo_find(vm, rbo);
 	if (bo_va) {
 		if (--bo_va->ref_count == 0) {
 			amdgpu_vm_bo_rmv(adev, bo_va);
 		}
 	}
 	amdgpu_bo_unreserve(rbo);
 }

 static int amdgpu_gem_handle_lockup(struct amdgpu_device *adev, int r)
 {
 	if (r == -EDEADLK) {
 		r = amdgpu_gpu_reset(adev);
 		if (!r)
 			r = -EAGAIN;
 	}
 	return r;
 }

 /*
  * GEM ioctls.
  */
 int amdgpu_gem_create_ioctl(struct drm_device *dev, void *data,
 			    struct drm_file *filp)
 {
 	struct amdgpu_device *adev = dev->dev_private;
 	union drm_amdgpu_gem_create *args = data;
 	uint64_t size = args->in.bo_size;
 	struct drm_gem_object *gobj;
 	uint32_t handle;
 	bool kernel = false;
 	int r;

 	/* create a gem object to contain this object in */
 	if (args->in.domains & (AMDGPU_GEM_DOMAIN_GDS |
 	    AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA)) {
 		kernel = true;
 		if (args->in.domains == AMDGPU_GEM_DOMAIN_GDS)
 			size = size << AMDGPU_GDS_SHIFT;
 		else if (args->in.domains == AMDGPU_GEM_DOMAIN_GWS)
 			size = size << AMDGPU_GWS_SHIFT;
 		else if (args->in.domains == AMDGPU_GEM_DOMAIN_OA)
 			size = size << AMDGPU_OA_SHIFT;
 		else {
 			r = -EINVAL;
 			goto error_unlock;
 		}
 	}
 	size = roundup(size, PAGE_SIZE);

 	r = amdgpu_gem_object_create(adev, size, args->in.alignment,
 				     (u32)(0xffffffff & args->in.domains),
 				     args->in.domain_flags,
 				     kernel, &gobj);
 	if (r)
 		goto error_unlock;

 	r = drm_gem_handle_create(filp, gobj, &handle);
 	/* drop reference from allocate - handle holds it now */
 	drm_gem_object_unreference_unlocked(gobj);
 	if (r)
 		goto error_unlock;

 	memset(args, 0, sizeof(*args));
 	args->out.handle = handle;
 	return 0;

 error_unlock:
 	r = amdgpu_gem_handle_lockup(adev, r);
 	return r;
 }

 int amdgpu_gem_userptr_ioctl(struct drm_device *dev, void *data,
 			     struct drm_file *filp)
 {
 	struct amdgpu_device *adev = dev->dev_private;
 	struct drm_amdgpu_gem_userptr *args = data;
 	struct drm_gem_object *gobj;
 	struct amdgpu_bo *bo;
 	uint32_t handle;
 	int r;

 	if (offset_in_page(args->addr | args->size))
 		return -EINVAL;

 	/* reject unknown flag values */
 	if (args->flags & ~(AMDGPU_GEM_USERPTR_READONLY |
 	    AMDGPU_GEM_USERPTR_ANONONLY | AMDGPU_GEM_USERPTR_VALIDATE |
 	    AMDGPU_GEM_USERPTR_REGISTER))
 		return -EINVAL;

 	if (!(args->flags & AMDGPU_GEM_USERPTR_READONLY) && (
 	     !(args->flags & AMDGPU_GEM_USERPTR_ANONONLY) ||
 	     !(args->flags & AMDGPU_GEM_USERPTR_REGISTER))) {

 		/* if we want to write to it we must require anonymous
 		   memory and install a MMU notifier */
 		return -EACCES;
 	}

 	/* create a gem object to contain this object in */
 	r = amdgpu_gem_object_create(adev, args->size, 0,
 				     AMDGPU_GEM_DOMAIN_CPU, 0,
 				     0, &gobj);
 	if (r)
 		goto handle_lockup;

 	bo = gem_to_amdgpu_bo(gobj);
 	r = amdgpu_ttm_tt_set_userptr(bo->tbo.ttm, args->addr, args->flags);
 	if (r)
 		goto release_object;

 	if (args->flags & AMDGPU_GEM_USERPTR_REGISTER) {
 		r = amdgpu_mn_register(bo, args->addr);
 		if (r)
 			goto release_object;
 	}

 	if (args->flags & AMDGPU_GEM_USERPTR_VALIDATE) {
 		down_read(&current->mm->mmap_sem);
 		r = amdgpu_bo_reserve(bo, true);
 		if (r) {
 			up_read(&current->mm->mmap_sem);
 			goto release_object;
 		}

 		amdgpu_ttm_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_GTT);
 		r = ttm_bo_validate(&bo->tbo, &bo->placement, true, false);
 		amdgpu_bo_unreserve(bo);
 		up_read(&current->mm->mmap_sem);
 		if (r)
 			goto release_object;
 	}

 	r = drm_gem_handle_create(filp, gobj, &handle);
 	/* drop reference from allocate - handle holds it now */
 	drm_gem_object_unreference_unlocked(gobj);
 	if (r)
 		goto handle_lockup;

 	args->handle = handle;
 	return 0;

 release_object:
 	drm_gem_object_unreference_unlocked(gobj);

 handle_lockup:
 	r = amdgpu_gem_handle_lockup(adev, r);

 	return r;
 }

 int amdgpu_mode_dumb_mmap(struct drm_file *filp,
 			  struct drm_device *dev,
 			  uint32_t handle, uint64_t *offset_p)
 {
 	struct drm_gem_object *gobj;
 	struct amdgpu_bo *robj;

 	gobj = drm_gem_object_lookup(dev, filp, handle);
 	if (gobj == NULL) {
 		return -ENOENT;
 	}
 	robj = gem_to_amdgpu_bo(gobj);
 	if (amdgpu_ttm_tt_has_userptr(robj->tbo.ttm) ||
 	    (robj->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)) {
 		drm_gem_object_unreference_unlocked(gobj);
 		return -EPERM;
 	}
 	*offset_p = amdgpu_bo_mmap_offset(robj);
 	drm_gem_object_unreference_unlocked(gobj);
 	return 0;
 }

 int amdgpu_gem_mmap_ioctl(struct drm_device *dev, void *data,
 			  struct drm_file *filp)
 {
 	union drm_amdgpu_gem_mmap *args = data;
 	uint32_t handle = args->in.handle;
 	memset(args, 0, sizeof(*args));
 	return amdgpu_mode_dumb_mmap(filp, dev, handle, &args->out.addr_ptr);
 }

 /**
  * amdgpu_gem_timeout - calculate jiffies timeout from absolute value
  *
  * @timeout_ns: timeout in ns
  *
  * Calculate the timeout in jiffies from an absolute timeout in ns.
  */
 unsigned long amdgpu_gem_timeout(uint64_t timeout_ns)
 {
 	unsigned long timeout_jiffies;
 	ktime_t timeout;

 	/* clamp timeout if it's to large */
 	if (((int64_t)timeout_ns) < 0)
 		return MAX_SCHEDULE_TIMEOUT;

 	timeout = ktime_sub(ns_to_ktime(timeout_ns), ktime_get());
 	if (ktime_to_ns(timeout) < 0)
 		return 0;

 	timeout_jiffies = nsecs_to_jiffies(ktime_to_ns(timeout));
 	/*  clamp timeout to avoid unsigned-> signed overflow */
 	if (timeout_jiffies > MAX_SCHEDULE_TIMEOUT )
 		return MAX_SCHEDULE_TIMEOUT - 1;

 	return timeout_jiffies;
 }

 int amdgpu_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
 			      struct drm_file *filp)
 {
 	struct amdgpu_device *adev = dev->dev_private;
 	union drm_amdgpu_gem_wait_idle *args = data;
 	struct drm_gem_object *gobj;
 	struct amdgpu_bo *robj;
 	uint32_t handle = args->in.handle;
 	unsigned long timeout = amdgpu_gem_timeout(args->in.timeout);
 	int r = 0;
 	long ret;

 	gobj = drm_gem_object_lookup(dev, filp, handle);
 	if (gobj == NULL) {
 		return -ENOENT;
 	}
 	robj = gem_to_amdgpu_bo(gobj);
 	if (timeout == 0)
 		ret = reservation_object_test_signaled_rcu(robj->tbo.resv, true);
 	else
 		ret = reservation_object_wait_timeout_rcu(robj->tbo.resv, true, true, timeout);

 	/* ret == 0 means not signaled,
 	 * ret > 0 means signaled
 	 * ret < 0 means interrupted before timeout
 	 */
 	if (ret >= 0) {
 		memset(args, 0, sizeof(*args));
 		args->out.status = (ret == 0);
 	} else
 		r = ret;

 	drm_gem_object_unreference_unlocked(gobj);
 	r = amdgpu_gem_handle_lockup(adev, r);
 	return r;
 }

 int amdgpu_gem_metadata_ioctl(struct drm_device *dev, void *data,
 				struct drm_file *filp)
 {
 	struct drm_amdgpu_gem_metadata *args = data;
 	struct drm_gem_object *gobj;
 	struct amdgpu_bo *robj;
 	int r = -1;

 	DRM_DEBUG("%d \n", args->handle);
 	gobj = drm_gem_object_lookup(dev, filp, args->handle);
 	if (gobj == NULL)
 		return -ENOENT;
 	robj = gem_to_amdgpu_bo(gobj);

 	r = amdgpu_bo_reserve(robj, false);
 	if (unlikely(r != 0))
 		goto out;

 	if (args->op == AMDGPU_GEM_METADATA_OP_GET_METADATA) {
 		amdgpu_bo_get_tiling_flags(robj, &args->data.tiling_info);
 		r = amdgpu_bo_get_metadata(robj, args->data.data,
 					   sizeof(args->data.data),
 					   &args->data.data_size_bytes,
 					   &args->data.flags);
 	} else if (args->op == AMDGPU_GEM_METADATA_OP_SET_METADATA) {
 		if (args->data.data_size_bytes > sizeof(args->data.data)) {
 			r = -EINVAL;
 			goto unreserve;
 		}
 		r = amdgpu_bo_set_tiling_flags(robj, args->data.tiling_info);
 		if (!r)
 			r = amdgpu_bo_set_metadata(robj, args->data.data,
 						   args->data.data_size_bytes,
 						   args->data.flags);
 	}

 unreserve:
 	amdgpu_bo_unreserve(robj);
 out:
 	drm_gem_object_unreference_unlocked(gobj);
 	return r;
 }

 /**
  * amdgpu_gem_va_update_vm -update the bo_va in its VM
  *
  * @adev: amdgpu_device pointer
  * @bo_va: bo_va to update
  *
  * Update the bo_va directly after setting it's address. Errors are not
  * vital here, so they are not reported back to userspace.
  */
 static void amdgpu_gem_va_update_vm(struct amdgpu_device *adev,
 				    struct amdgpu_bo_va *bo_va, uint32_t operation)
 {
 	struct ttm_validate_buffer tv, *entry;
 	struct amdgpu_bo_list_entry *vm_bos;
 	struct ww_acquire_ctx ticket;
 	struct list_head list, duplicates;
 	unsigned domain;
 	int r;

 	INIT_LIST_HEAD(&list);
 	INIT_LIST_HEAD(&duplicates);

 	tv.bo = &bo_va->bo->tbo;
 	tv.shared = true;
 	list_add(&tv.head, &list);

 	vm_bos = amdgpu_vm_get_bos(adev, bo_va->vm, &list);
 	if (!vm_bos)
 		return;

 	/* Provide duplicates to avoid -EALREADY */
 	r = ttm_eu_reserve_buffers(&ticket, &list, true, &duplicates);
 	if (r)
 		goto error_free;

 	list_for_each_entry(entry, &list, head) {
 		domain = amdgpu_mem_type_to_domain(entry->bo->mem.mem_type);
 		/* if anything is swapped out don't swap it in here,
 		   just abort and wait for the next CS */
 		if (domain == AMDGPU_GEM_DOMAIN_CPU)
 			goto error_unreserve;
 	}
 	r = amdgpu_vm_update_page_directory(adev, bo_va->vm);
 	if (r)
 		goto error_unreserve;

 	r = amdgpu_vm_clear_freed(adev, bo_va->vm);
 	if (r)
 		goto error_unreserve;

 	if (operation == AMDGPU_VA_OP_MAP)
 		r = amdgpu_vm_bo_update(adev, bo_va, &bo_va->bo->tbo.mem);

 error_unreserve:
 	ttm_eu_backoff_reservation(&ticket, &list);

 error_free:
 	drm_free_large(vm_bos);

 	if (r && r != -ERESTARTSYS)
 		DRM_ERROR("Couldn't update BO_VA (%d)\n", r);
 }


 int amdgpu_gem_va_ioctl(struct drm_device *dev, void *data,
 			  struct drm_file *filp)
 {
 	struct drm_amdgpu_gem_va *args = data;
 	struct drm_gem_object *gobj;
 	struct amdgpu_device *adev = dev->dev_private;
 	struct amdgpu_fpriv *fpriv = filp->driver_priv;
 	struct amdgpu_bo *rbo;
 	struct amdgpu_bo_va *bo_va;
 	struct ttm_validate_buffer tv, tv_pd;
 	struct ww_acquire_ctx ticket;
 	struct list_head list, duplicates;
 	uint32_t invalid_flags, va_flags = 0;
 	int r = 0;

 	if (!adev->vm_manager.enabled)
 		return -ENOTTY;

 	if (args->va_address < AMDGPU_VA_RESERVED_SIZE) {
 		dev_err(&dev->pdev->dev,
 			"va_address 0x%lX is in reserved area 0x%X\n",
 			(unsigned long)args->va_address,
 			AMDGPU_VA_RESERVED_SIZE);
 		return -EINVAL;
 	}

 	invalid_flags = ~(AMDGPU_VM_DELAY_UPDATE | AMDGPU_VM_PAGE_READABLE |
 			AMDGPU_VM_PAGE_WRITEABLE | AMDGPU_VM_PAGE_EXECUTABLE);
 	if ((args->flags & invalid_flags)) {
 		dev_err(&dev->pdev->dev, "invalid flags 0x%08X vs 0x%08X\n",
 			args->flags, invalid_flags);
 		return -EINVAL;
 	}

 	switch (args->operation) {
 	case AMDGPU_VA_OP_MAP:
 	case AMDGPU_VA_OP_UNMAP:
 		break;
 	default:
 		dev_err(&dev->pdev->dev, "unsupported operation %d\n",
 			args->operation);
 		return -EINVAL;
 	}

 	gobj = drm_gem_object_lookup(dev, filp, args->handle);
 	if (gobj == NULL)
 		return -ENOENT;
 	rbo = gem_to_amdgpu_bo(gobj);
 	INIT_LIST_HEAD(&list);
 	INIT_LIST_HEAD(&duplicates);
 	tv.bo = &rbo->tbo;
 	tv.shared = true;
 	list_add(&tv.head, &list);

 	if (args->operation == AMDGPU_VA_OP_MAP) {
 		tv_pd.bo = &fpriv->vm.page_directory->tbo;
 		tv_pd.shared = true;
 		list_add(&tv_pd.head, &list);
 	}
 	r = ttm_eu_reserve_buffers(&ticket, &list, true, &duplicates);
 	if (r) {
 		drm_gem_object_unreference_unlocked(gobj);
 		return r;
 	}

 	bo_va = amdgpu_vm_bo_find(&fpriv->vm, rbo);
 	if (!bo_va) {
 		ttm_eu_backoff_reservation(&ticket, &list);
 		drm_gem_object_unreference_unlocked(gobj);
 		return -ENOENT;
 	}

 	switch (args->operation) {
 	case AMDGPU_VA_OP_MAP:
 		if (args->flags & AMDGPU_VM_PAGE_READABLE)
 			va_flags |= AMDGPU_PTE_READABLE;
 		if (args->flags & AMDGPU_VM_PAGE_WRITEABLE)
 			va_flags |= AMDGPU_PTE_WRITEABLE;
 		if (args->flags & AMDGPU_VM_PAGE_EXECUTABLE)
 			va_flags |= AMDGPU_PTE_EXECUTABLE;
 		r = amdgpu_vm_bo_map(adev, bo_va, args->va_address,
 				     args->offset_in_bo, args->map_size,
 				     va_flags);
 		break;
 	case AMDGPU_VA_OP_UNMAP:
 		r = amdgpu_vm_bo_unmap(adev, bo_va, args->va_address);
 		break;
 	default:
 		break;
 	}
 	ttm_eu_backoff_reservation(&ticket, &list);
 	if (!r && !(args->flags & AMDGPU_VM_DELAY_UPDATE))
 		amdgpu_gem_va_update_vm(adev, bo_va, args->operation);

 	drm_gem_object_unreference_unlocked(gobj);
 	return r;
 }

 int amdgpu_gem_op_ioctl(struct drm_device *dev, void *data,
 			struct drm_file *filp)
 {
 	struct drm_amdgpu_gem_op *args = data;
 	struct drm_gem_object *gobj;
 	struct amdgpu_bo *robj;
 	int r;

 	gobj = drm_gem_object_lookup(dev, filp, args->handle);
 	if (gobj == NULL) {
 		return -ENOENT;
 	}
 	robj = gem_to_amdgpu_bo(gobj);

 	r = amdgpu_bo_reserve(robj, false);
 	if (unlikely(r))
 		goto out;

 	switch (args->op) {
 	case AMDGPU_GEM_OP_GET_GEM_CREATE_INFO: {
 		struct drm_amdgpu_gem_create_in info;
 		void __user *out = (void __user *)(long)args->value;

 		info.bo_size = robj->gem_base.size;
 		info.alignment = robj->tbo.mem.page_alignment << PAGE_SHIFT;
 		info.domains = robj->initial_domain;
 		info.domain_flags = robj->flags;
 		amdgpu_bo_unreserve(robj);
 		if (copy_to_user(out, &info, sizeof(info)))
 			r = -EFAULT;
 		break;
 	}
 	case AMDGPU_GEM_OP_SET_PLACEMENT:
 		if (amdgpu_ttm_tt_has_userptr(robj->tbo.ttm)) {
 			r = -EPERM;
 			amdgpu_bo_unreserve(robj);
 			break;
 		}
 		robj->initial_domain = args->value & (AMDGPU_GEM_DOMAIN_VRAM |
 						      AMDGPU_GEM_DOMAIN_GTT |
 						      AMDGPU_GEM_DOMAIN_CPU);
 		amdgpu_bo_unreserve(robj);
 		break;
 	default:
 		amdgpu_bo_unreserve(robj);
 		r = -EINVAL;
 	}

 out:
 	drm_gem_object_unreference_unlocked(gobj);
 	return r;
 }

 int amdgpu_mode_dumb_create(struct drm_file *file_priv,
 			    struct drm_device *dev,
 			    struct drm_mode_create_dumb *args)
 {
 	struct amdgpu_device *adev = dev->dev_private;
 	struct drm_gem_object *gobj;
 	uint32_t handle;
 	int r;

 	args->pitch = amdgpu_align_pitch(adev, args->width, args->bpp, 0) * ((args->bpp + 1) / 8);
 	args->size = (u64)args->pitch * args->height;
 	args->size = ALIGN(args->size, PAGE_SIZE);

 	r = amdgpu_gem_object_create(adev, args->size, 0,
 				     AMDGPU_GEM_DOMAIN_VRAM,
 				     AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
 				     ttm_bo_type_device,
 				     &gobj);
 	if (r)
 		return -ENOMEM;

 	r = drm_gem_handle_create(file_priv, gobj, &handle);
 	/* drop reference from allocate - handle holds it now */
 	drm_gem_object_unreference_unlocked(gobj);
 	if (r) {
 		return r;
 	}
 	args->handle = handle;
 	return 0;
 }

 #if defined(CONFIG_DEBUG_FS)
 static int amdgpu_debugfs_gem_info(struct seq_file *m, void *data)
 {
 	struct drm_info_node *node = (struct drm_info_node *)m->private;
 	struct drm_device *dev = node->minor->dev;
 	struct amdgpu_device *adev = dev->dev_private;
 	struct amdgpu_bo *rbo;
 	unsigned i = 0;

 	mutex_lock(&adev->gem.mutex);
 	list_for_each_entry(rbo, &adev->gem.objects, list) {
 		unsigned domain;
 		const char *placement;

 		domain = amdgpu_mem_type_to_domain(rbo->tbo.mem.mem_type);
 		switch (domain) {
 		case AMDGPU_GEM_DOMAIN_VRAM:
 			placement = "VRAM";
 			break;
 		case AMDGPU_GEM_DOMAIN_GTT:
 			placement = " GTT";
 			break;
 		case AMDGPU_GEM_DOMAIN_CPU:
 		default:
 			placement = " CPU";
 			break;
 		}
 		seq_printf(m, "bo[0x%08x] %8ldkB %8ldMB %s pid %8ld\n",
 			   i, amdgpu_bo_size(rbo) >> 10, amdgpu_bo_size(rbo) >> 20,
 			   placement, (unsigned long)rbo->pid);
 		i++;
 	}
 	mutex_unlock(&adev->gem.mutex);
 	return 0;
 }

 static struct drm_info_list amdgpu_debugfs_gem_list[] = {
 	{"amdgpu_gem_info", &amdgpu_debugfs_gem_info, 0, NULL},
 };
 #endif

 int amdgpu_gem_debugfs_init(struct amdgpu_device *adev)
 {
 #if defined(CONFIG_DEBUG_FS)
 	return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_gem_list, 1);
 #endif
 	return 0;
 }
	/*
	* Copyright 2008 Advanced Micro Devices, Inc.
	* Copyright 2008 Red Hat Inc.
	* Copyright 2009 Jerome Glisse.
	*
	* 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, sublicense,
	* 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 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 NONINFRINGEMENT. IN NO EVENT SHALL
	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
	*
	* Authors: Dave Airlie
	* Alex Deucher
	* Jerome Glisse
	*/
	#include <linux/ktime.h>
	#include <drm/drmP.h>
	#include <drm/amdgpu_drm.h>
	#include "amdgpu.h"

	void amdgpu_gem_object_free(struct drm_gem_object *gobj)
	{
	struct amdgpu_bo *robj = gem_to_amdgpu_bo(gobj);

	if (robj) {
	if (robj->gem_base.import_attach)
	drm_prime_gem_destroy(&robj->gem_base, robj->tbo.sg);
	amdgpu_mn_unregister(robj);
	amdgpu_bo_unref(&robj);
	}
	}

	int amdgpu_gem_object_create(struct amdgpu_device *adev, unsigned long size,
	int alignment, u32 initial_domain,
	u64 flags, bool kernel,
	struct drm_gem_object **obj)
	{
	struct amdgpu_bo *robj;
	unsigned long max_size;
	int r;

	*obj = NULL;
	/* At least align on page size */
	if (alignment < PAGE_SIZE) {
	alignment = PAGE_SIZE;
	}

	if (!(initial_domain & (AMDGPU_GEM_DOMAIN_GDS \| AMDGPU_GEM_DOMAIN_GWS \| AMDGPU_GEM_DOMAIN_OA))) {
	/* Maximum bo size is the unpinned gtt size since we use the gtt to
	* handle vram to system pool migrations.
	*/
	max_size = adev->mc.gtt_size - adev->gart_pin_size;
	if (size > max_size) {
	DRM_DEBUG("Allocation size %ldMb bigger than %ldMb limit\n",
	size >> 20, max_size >> 20);
	return -ENOMEM;
	}
	}
	retry:
	r = amdgpu_bo_create(adev, size, alignment, kernel, initial_domain,
	flags, NULL, NULL, &robj);
	if (r) {
	if (r != -ERESTARTSYS) {
	if (initial_domain == AMDGPU_GEM_DOMAIN_VRAM) {
	initial_domain \|= AMDGPU_GEM_DOMAIN_GTT;
	goto retry;
	}
	DRM_ERROR("Failed to allocate GEM object (%ld, %d, %u, %d)\n",
	size, initial_domain, alignment, r);
	}
	return r;
	}
	*obj = &robj->gem_base;
	robj->pid = task_pid_nr(current);

	mutex_lock(&adev->gem.mutex);
	list_add_tail(&robj->list, &adev->gem.objects);
	mutex_unlock(&adev->gem.mutex);

	return 0;
	}

	int amdgpu_gem_init(struct amdgpu_device *adev)
	{
	INIT_LIST_HEAD(&adev->gem.objects);
	return 0;
	}

	void amdgpu_gem_fini(struct amdgpu_device *adev)
	{
	amdgpu_bo_force_delete(adev);
	}

	/*
	* Call from drm_gem_handle_create which appear in both new and open ioctl
	* case.
	*/
	int amdgpu_gem_object_open(struct drm_gem_object obj, struct drm_file file_priv)
	{
	struct amdgpu_bo *rbo = gem_to_amdgpu_bo(obj);
	struct amdgpu_device *adev = rbo->adev;
	struct amdgpu_fpriv *fpriv = file_priv->driver_priv;
	struct amdgpu_vm *vm = &fpriv->vm;
	struct amdgpu_bo_va *bo_va;
	int r;
	r = amdgpu_bo_reserve(rbo, false);
	if (r)
	return r;

	bo_va = amdgpu_vm_bo_find(vm, rbo);
	if (!bo_va) {
	bo_va = amdgpu_vm_bo_add(adev, vm, rbo);
	} else {
	++bo_va->ref_count;
	}
	amdgpu_bo_unreserve(rbo);
	return 0;
	}

	void amdgpu_gem_object_close(struct drm_gem_object *obj,
	struct drm_file *file_priv)
	{
	struct amdgpu_bo *rbo = gem_to_amdgpu_bo(obj);
	struct amdgpu_device *adev = rbo->adev;
	struct amdgpu_fpriv *fpriv = file_priv->driver_priv;
	struct amdgpu_vm *vm = &fpriv->vm;
	struct amdgpu_bo_va *bo_va;
	int r;
	r = amdgpu_bo_reserve(rbo, true);
	if (r) {
	dev_err(adev->dev, "leaking bo va because "
	"we fail to reserve bo (%d)\n", r);
	return;
	}
	bo_va = amdgpu_vm_bo_find(vm, rbo);
	if (bo_va) {
	if (--bo_va->ref_count == 0) {
	amdgpu_vm_bo_rmv(adev, bo_va);
	}
	}
	amdgpu_bo_unreserve(rbo);
	}

	static int amdgpu_gem_handle_lockup(struct amdgpu_device *adev, int r)
	{
	if (r == -EDEADLK) {
	r = amdgpu_gpu_reset(adev);
	if (!r)
	r = -EAGAIN;
	}
	return r;
	}

	/*
	* GEM ioctls.
	*/
	int amdgpu_gem_create_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	struct amdgpu_device *adev = dev->dev_private;
	union drm_amdgpu_gem_create *args = data;
	uint64_t size = args->in.bo_size;
	struct drm_gem_object *gobj;
	uint32_t handle;
	bool kernel = false;
	int r;

	/* create a gem object to contain this object in */
	if (args->in.domains & (AMDGPU_GEM_DOMAIN_GDS \|
	AMDGPU_GEM_DOMAIN_GWS \| AMDGPU_GEM_DOMAIN_OA)) {
	kernel = true;
	if (args->in.domains == AMDGPU_GEM_DOMAIN_GDS)
	size = size << AMDGPU_GDS_SHIFT;
	else if (args->in.domains == AMDGPU_GEM_DOMAIN_GWS)
	size = size << AMDGPU_GWS_SHIFT;
	else if (args->in.domains == AMDGPU_GEM_DOMAIN_OA)
	size = size << AMDGPU_OA_SHIFT;
	else {
	r = -EINVAL;
	goto error_unlock;
	}
	}
	size = roundup(size, PAGE_SIZE);

	r = amdgpu_gem_object_create(adev, size, args->in.alignment,
	(u32)(0xffffffff & args->in.domains),
	args->in.domain_flags,
	kernel, &gobj);
	if (r)
	goto error_unlock;

	r = drm_gem_handle_create(filp, gobj, &handle);
	/* drop reference from allocate - handle holds it now */
	drm_gem_object_unreference_unlocked(gobj);
	if (r)
	goto error_unlock;

	memset(args, 0, sizeof(*args));
	args->out.handle = handle;
	return 0;

	error_unlock:
	r = amdgpu_gem_handle_lockup(adev, r);
	return r;
	}

	int amdgpu_gem_userptr_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	struct amdgpu_device *adev = dev->dev_private;
	struct drm_amdgpu_gem_userptr *args = data;
	struct drm_gem_object *gobj;
	struct amdgpu_bo *bo;
	uint32_t handle;
	int r;

	if (offset_in_page(args->addr \| args->size))
	return -EINVAL;

	/* reject unknown flag values */
	if (args->flags & ~(AMDGPU_GEM_USERPTR_READONLY \|
	AMDGPU_GEM_USERPTR_ANONONLY \| AMDGPU_GEM_USERPTR_VALIDATE \|
	AMDGPU_GEM_USERPTR_REGISTER))
	return -EINVAL;

	if (!(args->flags & AMDGPU_GEM_USERPTR_READONLY) && (
	!(args->flags & AMDGPU_GEM_USERPTR_ANONONLY) \|\|
	!(args->flags & AMDGPU_GEM_USERPTR_REGISTER))) {

	/* if we want to write to it we must require anonymous
	memory and install a MMU notifier */
	return -EACCES;
	}

	/* create a gem object to contain this object in */
	r = amdgpu_gem_object_create(adev, args->size, 0,
	AMDGPU_GEM_DOMAIN_CPU, 0,
	0, &gobj);
	if (r)
	goto handle_lockup;

	bo = gem_to_amdgpu_bo(gobj);
	r = amdgpu_ttm_tt_set_userptr(bo->tbo.ttm, args->addr, args->flags);
	if (r)
	goto release_object;

	if (args->flags & AMDGPU_GEM_USERPTR_REGISTER) {
	r = amdgpu_mn_register(bo, args->addr);
	if (r)
	goto release_object;
	}

	if (args->flags & AMDGPU_GEM_USERPTR_VALIDATE) {
	down_read(&current->mm->mmap_sem);
	r = amdgpu_bo_reserve(bo, true);
	if (r) {
	up_read(&current->mm->mmap_sem);
	goto release_object;
	}

	amdgpu_ttm_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_GTT);
	r = ttm_bo_validate(&bo->tbo, &bo->placement, true, false);
	amdgpu_bo_unreserve(bo);
	up_read(&current->mm->mmap_sem);
	if (r)
	goto release_object;
	}

	r = drm_gem_handle_create(filp, gobj, &handle);
	/* drop reference from allocate - handle holds it now */
	drm_gem_object_unreference_unlocked(gobj);
	if (r)
	goto handle_lockup;

	args->handle = handle;
	return 0;

	release_object:
	drm_gem_object_unreference_unlocked(gobj);

	handle_lockup:
	r = amdgpu_gem_handle_lockup(adev, r);

	return r;
	}

	int amdgpu_mode_dumb_mmap(struct drm_file *filp,
	struct drm_device *dev,
	uint32_t handle, uint64_t *offset_p)
	{
	struct drm_gem_object *gobj;
	struct amdgpu_bo *robj;

	gobj = drm_gem_object_lookup(dev, filp, handle);
	if (gobj == NULL) {
	return -ENOENT;
	}
	robj = gem_to_amdgpu_bo(gobj);
	if (amdgpu_ttm_tt_has_userptr(robj->tbo.ttm) \|\|
	(robj->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)) {
	drm_gem_object_unreference_unlocked(gobj);
	return -EPERM;
	}
	*offset_p = amdgpu_bo_mmap_offset(robj);
	drm_gem_object_unreference_unlocked(gobj);
	return 0;
	}

	int amdgpu_gem_mmap_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	union drm_amdgpu_gem_mmap *args = data;
	uint32_t handle = args->in.handle;
	memset(args, 0, sizeof(*args));
	return amdgpu_mode_dumb_mmap(filp, dev, handle, &args->out.addr_ptr);
	}

	/**
	* amdgpu_gem_timeout - calculate jiffies timeout from absolute value
	*
	* @timeout_ns: timeout in ns
	*
	* Calculate the timeout in jiffies from an absolute timeout in ns.
	*/
	unsigned long amdgpu_gem_timeout(uint64_t timeout_ns)
	{
	unsigned long timeout_jiffies;
	ktime_t timeout;

	/* clamp timeout if it's to large */
	if (((int64_t)timeout_ns) < 0)
	return MAX_SCHEDULE_TIMEOUT;

	timeout = ktime_sub(ns_to_ktime(timeout_ns), ktime_get());
	if (ktime_to_ns(timeout) < 0)
	return 0;

	timeout_jiffies = nsecs_to_jiffies(ktime_to_ns(timeout));
	/* clamp timeout to avoid unsigned-> signed overflow */
	if (timeout_jiffies > MAX_SCHEDULE_TIMEOUT )
	return MAX_SCHEDULE_TIMEOUT - 1;

	return timeout_jiffies;
	}

	int amdgpu_gem_wait_idle_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	struct amdgpu_device *adev = dev->dev_private;
	union drm_amdgpu_gem_wait_idle *args = data;
	struct drm_gem_object *gobj;
	struct amdgpu_bo *robj;
	uint32_t handle = args->in.handle;
	unsigned long timeout = amdgpu_gem_timeout(args->in.timeout);
	int r = 0;
	long ret;

	gobj = drm_gem_object_lookup(dev, filp, handle);
	if (gobj == NULL) {
	return -ENOENT;
	}
	robj = gem_to_amdgpu_bo(gobj);
	if (timeout == 0)
	ret = reservation_object_test_signaled_rcu(robj->tbo.resv, true);
	else
	ret = reservation_object_wait_timeout_rcu(robj->tbo.resv, true, true, timeout);

	/* ret == 0 means not signaled,
	* ret > 0 means signaled
	* ret < 0 means interrupted before timeout
	*/
	if (ret >= 0) {
	memset(args, 0, sizeof(*args));
	args->out.status = (ret == 0);
	} else
	r = ret;

	drm_gem_object_unreference_unlocked(gobj);
	r = amdgpu_gem_handle_lockup(adev, r);
	return r;
	}

	int amdgpu_gem_metadata_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	struct drm_amdgpu_gem_metadata *args = data;
	struct drm_gem_object *gobj;
	struct amdgpu_bo *robj;
	int r = -1;

	DRM_DEBUG("%d \n", args->handle);
	gobj = drm_gem_object_lookup(dev, filp, args->handle);
	if (gobj == NULL)
	return -ENOENT;
	robj = gem_to_amdgpu_bo(gobj);

	r = amdgpu_bo_reserve(robj, false);
	if (unlikely(r != 0))
	goto out;

	if (args->op == AMDGPU_GEM_METADATA_OP_GET_METADATA) {
	amdgpu_bo_get_tiling_flags(robj, &args->data.tiling_info);
	r = amdgpu_bo_get_metadata(robj, args->data.data,
	sizeof(args->data.data),
	&args->data.data_size_bytes,
	&args->data.flags);
	} else if (args->op == AMDGPU_GEM_METADATA_OP_SET_METADATA) {
	if (args->data.data_size_bytes > sizeof(args->data.data)) {
	r = -EINVAL;
	goto unreserve;
	}
	r = amdgpu_bo_set_tiling_flags(robj, args->data.tiling_info);
	if (!r)
	r = amdgpu_bo_set_metadata(robj, args->data.data,
	args->data.data_size_bytes,
	args->data.flags);
	}

	unreserve:
	amdgpu_bo_unreserve(robj);
	out:
	drm_gem_object_unreference_unlocked(gobj);
	return r;
	}

	/**
	* amdgpu_gem_va_update_vm -update the bo_va in its VM
	*
	* @adev: amdgpu_device pointer
	* @bo_va: bo_va to update
	*
	* Update the bo_va directly after setting it's address. Errors are not
	* vital here, so they are not reported back to userspace.
	*/
	static void amdgpu_gem_va_update_vm(struct amdgpu_device *adev,
	struct amdgpu_bo_va *bo_va, uint32_t operation)
	{
	struct ttm_validate_buffer tv, *entry;
	struct amdgpu_bo_list_entry *vm_bos;
	struct ww_acquire_ctx ticket;
	struct list_head list, duplicates;
	unsigned domain;
	int r;

	INIT_LIST_HEAD(&list);
	INIT_LIST_HEAD(&duplicates);

	tv.bo = &bo_va->bo->tbo;
	tv.shared = true;
	list_add(&tv.head, &list);

	vm_bos = amdgpu_vm_get_bos(adev, bo_va->vm, &list);
	if (!vm_bos)
	return;

	/* Provide duplicates to avoid -EALREADY */
	r = ttm_eu_reserve_buffers(&ticket, &list, true, &duplicates);
	if (r)
	goto error_free;

	list_for_each_entry(entry, &list, head) {
	domain = amdgpu_mem_type_to_domain(entry->bo->mem.mem_type);
	/* if anything is swapped out don't swap it in here,
	just abort and wait for the next CS */
	if (domain == AMDGPU_GEM_DOMAIN_CPU)
	goto error_unreserve;
	}
	r = amdgpu_vm_update_page_directory(adev, bo_va->vm);
	if (r)
	goto error_unreserve;

	r = amdgpu_vm_clear_freed(adev, bo_va->vm);
	if (r)
	goto error_unreserve;

	if (operation == AMDGPU_VA_OP_MAP)
	r = amdgpu_vm_bo_update(adev, bo_va, &bo_va->bo->tbo.mem);

	error_unreserve:
	ttm_eu_backoff_reservation(&ticket, &list);

	error_free:
	drm_free_large(vm_bos);

	if (r && r != -ERESTARTSYS)
	DRM_ERROR("Couldn't update BO_VA (%d)\n", r);
	}



	int amdgpu_gem_va_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	struct drm_amdgpu_gem_va *args = data;
	struct drm_gem_object *gobj;
	struct amdgpu_device *adev = dev->dev_private;
	struct amdgpu_fpriv *fpriv = filp->driver_priv;
	struct amdgpu_bo *rbo;
	struct amdgpu_bo_va *bo_va;
	struct ttm_validate_buffer tv, tv_pd;
	struct ww_acquire_ctx ticket;
	struct list_head list, duplicates;
	uint32_t invalid_flags, va_flags = 0;
	int r = 0;

	if (!adev->vm_manager.enabled)
	return -ENOTTY;

	if (args->va_address < AMDGPU_VA_RESERVED_SIZE) {
	dev_err(&dev->pdev->dev,
	"va_address 0x%lX is in reserved area 0x%X\n",
	(unsigned long)args->va_address,
	AMDGPU_VA_RESERVED_SIZE);
	return -EINVAL;
	}

	invalid_flags = ~(AMDGPU_VM_DELAY_UPDATE \| AMDGPU_VM_PAGE_READABLE \|
	AMDGPU_VM_PAGE_WRITEABLE \| AMDGPU_VM_PAGE_EXECUTABLE);
	if ((args->flags & invalid_flags)) {
	dev_err(&dev->pdev->dev, "invalid flags 0x%08X vs 0x%08X\n",
	args->flags, invalid_flags);
	return -EINVAL;
	}

	switch (args->operation) {
	case AMDGPU_VA_OP_MAP:
	case AMDGPU_VA_OP_UNMAP:
	break;
	default:
	dev_err(&dev->pdev->dev, "unsupported operation %d\n",
	args->operation);
	return -EINVAL;
	}

	gobj = drm_gem_object_lookup(dev, filp, args->handle);
	if (gobj == NULL)
	return -ENOENT;
	rbo = gem_to_amdgpu_bo(gobj);
	INIT_LIST_HEAD(&list);
	INIT_LIST_HEAD(&duplicates);
	tv.bo = &rbo->tbo;
	tv.shared = true;
	list_add(&tv.head, &list);

	if (args->operation == AMDGPU_VA_OP_MAP) {
	tv_pd.bo = &fpriv->vm.page_directory->tbo;
	tv_pd.shared = true;
	list_add(&tv_pd.head, &list);
	}
	r = ttm_eu_reserve_buffers(&ticket, &list, true, &duplicates);
	if (r) {
	drm_gem_object_unreference_unlocked(gobj);
	return r;
	}

	bo_va = amdgpu_vm_bo_find(&fpriv->vm, rbo);
	if (!bo_va) {
	ttm_eu_backoff_reservation(&ticket, &list);
	drm_gem_object_unreference_unlocked(gobj);
	return -ENOENT;
	}

	switch (args->operation) {
	case AMDGPU_VA_OP_MAP:
	if (args->flags & AMDGPU_VM_PAGE_READABLE)
	va_flags \|= AMDGPU_PTE_READABLE;
	if (args->flags & AMDGPU_VM_PAGE_WRITEABLE)
	va_flags \|= AMDGPU_PTE_WRITEABLE;
	if (args->flags & AMDGPU_VM_PAGE_EXECUTABLE)
	va_flags \|= AMDGPU_PTE_EXECUTABLE;
	r = amdgpu_vm_bo_map(adev, bo_va, args->va_address,
	args->offset_in_bo, args->map_size,
	va_flags);
	break;
	case AMDGPU_VA_OP_UNMAP:
	r = amdgpu_vm_bo_unmap(adev, bo_va, args->va_address);
	break;
	default:
	break;
	}
	ttm_eu_backoff_reservation(&ticket, &list);
	if (!r && !(args->flags & AMDGPU_VM_DELAY_UPDATE))
	amdgpu_gem_va_update_vm(adev, bo_va, args->operation);

	drm_gem_object_unreference_unlocked(gobj);
	return r;
	}

	int amdgpu_gem_op_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	struct drm_amdgpu_gem_op *args = data;
	struct drm_gem_object *gobj;
	struct amdgpu_bo *robj;
	int r;

	gobj = drm_gem_object_lookup(dev, filp, args->handle);
	if (gobj == NULL) {
	return -ENOENT;
	}
	robj = gem_to_amdgpu_bo(gobj);

	r = amdgpu_bo_reserve(robj, false);
	if (unlikely(r))
	goto out;

	switch (args->op) {
	case AMDGPU_GEM_OP_GET_GEM_CREATE_INFO: {
	struct drm_amdgpu_gem_create_in info;
	void __user out = (void __user )(long)args->value;

	info.bo_size = robj->gem_base.size;
	info.alignment = robj->tbo.mem.page_alignment << PAGE_SHIFT;
	info.domains = robj->initial_domain;
	info.domain_flags = robj->flags;
	amdgpu_bo_unreserve(robj);
	if (copy_to_user(out, &info, sizeof(info)))
	r = -EFAULT;
	break;
	}
	case AMDGPU_GEM_OP_SET_PLACEMENT:
	if (amdgpu_ttm_tt_has_userptr(robj->tbo.ttm)) {
	r = -EPERM;
	amdgpu_bo_unreserve(robj);
	break;
	}
	robj->initial_domain = args->value & (AMDGPU_GEM_DOMAIN_VRAM \|
	AMDGPU_GEM_DOMAIN_GTT \|
	AMDGPU_GEM_DOMAIN_CPU);
	amdgpu_bo_unreserve(robj);
	break;
	default:
	amdgpu_bo_unreserve(robj);
	r = -EINVAL;
	}

	out:
	drm_gem_object_unreference_unlocked(gobj);
	return r;
	}

	int amdgpu_mode_dumb_create(struct drm_file *file_priv,
	struct drm_device *dev,
	struct drm_mode_create_dumb *args)
	{
	struct amdgpu_device *adev = dev->dev_private;
	struct drm_gem_object *gobj;
	uint32_t handle;
	int r;

	args->pitch = amdgpu_align_pitch(adev, args->width, args->bpp, 0) * ((args->bpp + 1) / 8);
	args->size = (u64)args->pitch * args->height;
	args->size = ALIGN(args->size, PAGE_SIZE);

	r = amdgpu_gem_object_create(adev, args->size, 0,
	AMDGPU_GEM_DOMAIN_VRAM,
	AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
	ttm_bo_type_device,
	&gobj);
	if (r)
	return -ENOMEM;

	r = drm_gem_handle_create(file_priv, gobj, &handle);
	/* drop reference from allocate - handle holds it now */
	drm_gem_object_unreference_unlocked(gobj);
	if (r) {
	return r;
	}
	args->handle = handle;
	return 0;
	}

	#if defined(CONFIG_DEBUG_FS)
	static int amdgpu_debugfs_gem_info(struct seq_file m, void data)
	{
	struct drm_info_node node = (struct drm_info_node )m->private;
	struct drm_device *dev = node->minor->dev;
	struct amdgpu_device *adev = dev->dev_private;
	struct amdgpu_bo *rbo;
	unsigned i = 0;

	mutex_lock(&adev->gem.mutex);
	list_for_each_entry(rbo, &adev->gem.objects, list) {
	unsigned domain;
	const char *placement;

	domain = amdgpu_mem_type_to_domain(rbo->tbo.mem.mem_type);
	switch (domain) {
	case AMDGPU_GEM_DOMAIN_VRAM:
	placement = "VRAM";
	break;
	case AMDGPU_GEM_DOMAIN_GTT:
	placement = " GTT";
	break;
	case AMDGPU_GEM_DOMAIN_CPU:
	default:
	placement = " CPU";
	break;
	}
	seq_printf(m, "bo[0x%08x] %8ldkB %8ldMB %s pid %8ld\n",
	i, amdgpu_bo_size(rbo) >> 10, amdgpu_bo_size(rbo) >> 20,
	placement, (unsigned long)rbo->pid);
	i++;
	}
	mutex_unlock(&adev->gem.mutex);
	return 0;
	}

	static struct drm_info_list amdgpu_debugfs_gem_list[] = {
	{"amdgpu_gem_info", &amdgpu_debugfs_gem_info, 0, NULL},
	};
	#endif

	int amdgpu_gem_debugfs_init(struct amdgpu_device *adev)
	{
	#if defined(CONFIG_DEBUG_FS)
	return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_gem_list, 1);
	#endif
	return 0;
	}