drivers/gpu/drm/radeon/radeon_gem.c - kernel/msm-5.4 - 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 "drmP.h"
 #include "radeon_drm.h"
 #include "radeon.h"

 int radeon_gem_object_init(struct drm_gem_object *obj)
 {
 	BUG();

 	return 0;
 }

 void radeon_gem_object_free(struct drm_gem_object *gobj)
 {
 	struct radeon_bo *robj = gem_to_radeon_bo(gobj);

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

 int radeon_gem_object_create(struct radeon_device *rdev, int size,
 				int alignment, int initial_domain,
 				bool discardable, bool kernel,
 				struct drm_gem_object **obj)
 {
 	struct radeon_bo *robj;
 	int r;

 	*obj = NULL;
 	/* At least align on page size */
 	if (alignment < PAGE_SIZE) {
 		alignment = PAGE_SIZE;
 	}
 	r = radeon_bo_create(rdev, size, alignment, kernel, initial_domain, NULL, &robj);
 	if (r) {
 		if (r != -ERESTARTSYS)
 			DRM_ERROR("Failed to allocate GEM object (%d, %d, %u, %d)\n",
 				  size, initial_domain, alignment, r);
 		return r;
 	}
 	*obj = &robj->gem_base;

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

 	return 0;
 }

 int radeon_gem_set_domain(struct drm_gem_object *gobj,
 			  uint32_t rdomain, uint32_t wdomain)
 {
 	struct radeon_bo *robj;
 	uint32_t domain;
 	int r;

 	/* FIXME: reeimplement */
 	robj = gem_to_radeon_bo(gobj);
 	/* work out where to validate the buffer to */
 	domain = wdomain;
 	if (!domain) {
 		domain = rdomain;
 	}
 	if (!domain) {
 		/* Do nothings */
 		printk(KERN_WARNING "Set domain without domain !\n");
 		return 0;
 	}
 	if (domain == RADEON_GEM_DOMAIN_CPU) {
 		/* Asking for cpu access wait for object idle */
 		r = radeon_bo_wait(robj, NULL, false);
 		if (r) {
 			printk(KERN_ERR "Failed to wait for object !\n");
 			return r;
 		}
 	}
 	return 0;
 }

 int radeon_gem_init(struct radeon_device *rdev)
 {
 	INIT_LIST_HEAD(&rdev->gem.objects);
 	return 0;
 }

 void radeon_gem_fini(struct radeon_device *rdev)
 {
 	radeon_bo_force_delete(rdev);
 }

 /*
  * Call from drm_gem_handle_create which appear in both new and open ioctl
  * case.
  */
 int radeon_gem_object_open(struct drm_gem_object *obj, struct drm_file *file_priv)
 {
 	return 0;
 }

 void radeon_gem_object_close(struct drm_gem_object *obj,
 			     struct drm_file *file_priv)
 {
 	struct radeon_bo *rbo = gem_to_radeon_bo(obj);
 	struct radeon_device *rdev = rbo->rdev;
 	struct radeon_fpriv *fpriv = file_priv->driver_priv;
 	struct radeon_vm *vm = &fpriv->vm;

 	if (rdev->family < CHIP_CAYMAN) {
 		return;
 	}

 	if (radeon_bo_reserve(rbo, false)) {
 		dev_err(rdev->dev, "leaking bo va because we fail to reserve bo\n");
 		return;
 	}
 	radeon_vm_bo_rmv(rdev, vm, rbo);
 	radeon_bo_unreserve(rbo);
 }

 static int radeon_gem_handle_lockup(struct radeon_device *rdev, int r)
 {
 	if (r == -EDEADLK) {
 		r = radeon_gpu_reset(rdev);
 		if (!r)
 			r = -EAGAIN;
 	}
 	return r;
 }

 /*
  * GEM ioctls.
  */
 int radeon_gem_info_ioctl(struct drm_device *dev, void *data,
 			  struct drm_file *filp)
 {
 	struct radeon_device *rdev = dev->dev_private;
 	struct drm_radeon_gem_info *args = data;
 	struct ttm_mem_type_manager *man;
 	unsigned i;

 	man = &rdev->mman.bdev.man[TTM_PL_VRAM];

 	args->vram_size = rdev->mc.real_vram_size;
 	args->vram_visible = (u64)man->size << PAGE_SHIFT;
 	if (rdev->stollen_vga_memory)
 		args->vram_visible -= radeon_bo_size(rdev->stollen_vga_memory);
 	args->vram_visible -= radeon_fbdev_total_size(rdev);
 	args->gart_size = rdev->mc.gtt_size - 4096 - RADEON_IB_POOL_SIZE*64*1024;
 	for(i = 0; i < RADEON_NUM_RINGS; ++i)
 		args->gart_size -= rdev->ring[i].ring_size;
 	return 0;
 }

 int radeon_gem_pread_ioctl(struct drm_device *dev, void *data,
 			   struct drm_file *filp)
 {
 	/* TODO: implement */
 	DRM_ERROR("unimplemented %s\n", __func__);
 	return -ENOSYS;
 }

 int radeon_gem_pwrite_ioctl(struct drm_device *dev, void *data,
 			    struct drm_file *filp)
 {
 	/* TODO: implement */
 	DRM_ERROR("unimplemented %s\n", __func__);
 	return -ENOSYS;
 }

 int radeon_gem_create_ioctl(struct drm_device *dev, void *data,
 			    struct drm_file *filp)
 {
 	struct radeon_device *rdev = dev->dev_private;
 	struct drm_radeon_gem_create *args = data;
 	struct drm_gem_object *gobj;
 	uint32_t handle;
 	int r;

 	down_read(&rdev->exclusive_lock);
 	/* create a gem object to contain this object in */
 	args->size = roundup(args->size, PAGE_SIZE);
 	r = radeon_gem_object_create(rdev, args->size, args->alignment,
 					args->initial_domain, false,
 					false, &gobj);
 	if (r) {
 		up_read(&rdev->exclusive_lock);
 		r = radeon_gem_handle_lockup(rdev, r);
 		return r;
 	}
 	r = drm_gem_handle_create(filp, gobj, &handle);
 	/* drop reference from allocate - handle holds it now */
 	drm_gem_object_unreference_unlocked(gobj);
 	if (r) {
 		up_read(&rdev->exclusive_lock);
 		r = radeon_gem_handle_lockup(rdev, r);
 		return r;
 	}
 	args->handle = handle;
 	up_read(&rdev->exclusive_lock);
 	return 0;
 }

 int radeon_gem_set_domain_ioctl(struct drm_device *dev, void *data,
 				struct drm_file *filp)
 {
 	/* transition the BO to a domain -
 	 * just validate the BO into a certain domain */
 	struct radeon_device *rdev = dev->dev_private;
 	struct drm_radeon_gem_set_domain *args = data;
 	struct drm_gem_object *gobj;
 	struct radeon_bo *robj;
 	int r;

 	/* for now if someone requests domain CPU -
 	 * just make sure the buffer is finished with */
 	down_read(&rdev->exclusive_lock);

 	/* just do a BO wait for now */
 	gobj = drm_gem_object_lookup(dev, filp, args->handle);
 	if (gobj == NULL) {
 		up_read(&rdev->exclusive_lock);
 		return -ENOENT;
 	}
 	robj = gem_to_radeon_bo(gobj);

 	r = radeon_gem_set_domain(gobj, args->read_domains, args->write_domain);

 	drm_gem_object_unreference_unlocked(gobj);
 	up_read(&rdev->exclusive_lock);
 	r = radeon_gem_handle_lockup(robj->rdev, r);
 	return r;
 }

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

 	gobj = drm_gem_object_lookup(dev, filp, handle);
 	if (gobj == NULL) {
 		return -ENOENT;
 	}
 	robj = gem_to_radeon_bo(gobj);
 	*offset_p = radeon_bo_mmap_offset(robj);
 	drm_gem_object_unreference_unlocked(gobj);
 	return 0;
 }

 int radeon_gem_mmap_ioctl(struct drm_device *dev, void *data,
 			  struct drm_file *filp)
 {
 	struct drm_radeon_gem_mmap *args = data;

 	return radeon_mode_dumb_mmap(filp, dev, args->handle, &args->addr_ptr);
 }

 int radeon_gem_busy_ioctl(struct drm_device *dev, void *data,
 			  struct drm_file *filp)
 {
 	struct radeon_device *rdev = dev->dev_private;
 	struct drm_radeon_gem_busy *args = data;
 	struct drm_gem_object *gobj;
 	struct radeon_bo *robj;
 	int r;
 	uint32_t cur_placement = 0;

 	gobj = drm_gem_object_lookup(dev, filp, args->handle);
 	if (gobj == NULL) {
 		return -ENOENT;
 	}
 	robj = gem_to_radeon_bo(gobj);
 	r = radeon_bo_wait(robj, &cur_placement, true);
 	switch (cur_placement) {
 	case TTM_PL_VRAM:
 		args->domain = RADEON_GEM_DOMAIN_VRAM;
 		break;
 	case TTM_PL_TT:
 		args->domain = RADEON_GEM_DOMAIN_GTT;
 		break;
 	case TTM_PL_SYSTEM:
 		args->domain = RADEON_GEM_DOMAIN_CPU;
 	default:
 		break;
 	}
 	drm_gem_object_unreference_unlocked(gobj);
 	r = radeon_gem_handle_lockup(rdev, r);
 	return r;
 }

 int radeon_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
 			      struct drm_file *filp)
 {
 	struct radeon_device *rdev = dev->dev_private;
 	struct drm_radeon_gem_wait_idle *args = data;
 	struct drm_gem_object *gobj;
 	struct radeon_bo *robj;
 	int r;

 	gobj = drm_gem_object_lookup(dev, filp, args->handle);
 	if (gobj == NULL) {
 		return -ENOENT;
 	}
 	robj = gem_to_radeon_bo(gobj);
 	r = radeon_bo_wait(robj, NULL, false);
 	/* callback hw specific functions if any */
 	if (rdev->asic->ioctl_wait_idle)
 		robj->rdev->asic->ioctl_wait_idle(rdev, robj);
 	drm_gem_object_unreference_unlocked(gobj);
 	r = radeon_gem_handle_lockup(rdev, r);
 	return r;
 }

 int radeon_gem_set_tiling_ioctl(struct drm_device *dev, void *data,
 				struct drm_file *filp)
 {
 	struct drm_radeon_gem_set_tiling *args = data;
 	struct drm_gem_object *gobj;
 	struct radeon_bo *robj;
 	int r = 0;

 	DRM_DEBUG("%d \n", args->handle);
 	gobj = drm_gem_object_lookup(dev, filp, args->handle);
 	if (gobj == NULL)
 		return -ENOENT;
 	robj = gem_to_radeon_bo(gobj);
 	r = radeon_bo_set_tiling_flags(robj, args->tiling_flags, args->pitch);
 	drm_gem_object_unreference_unlocked(gobj);
 	return r;
 }

 int radeon_gem_get_tiling_ioctl(struct drm_device *dev, void *data,
 				struct drm_file *filp)
 {
 	struct drm_radeon_gem_get_tiling *args = data;
 	struct drm_gem_object *gobj;
 	struct radeon_bo *rbo;
 	int r = 0;

 	DRM_DEBUG("\n");
 	gobj = drm_gem_object_lookup(dev, filp, args->handle);
 	if (gobj == NULL)
 		return -ENOENT;
 	rbo = gem_to_radeon_bo(gobj);
 	r = radeon_bo_reserve(rbo, false);
 	if (unlikely(r != 0))
 		goto out;
 	radeon_bo_get_tiling_flags(rbo, &args->tiling_flags, &args->pitch);
 	radeon_bo_unreserve(rbo);
 out:
 	drm_gem_object_unreference_unlocked(gobj);
 	return r;
 }

 int radeon_gem_va_ioctl(struct drm_device *dev, void *data,
 			  struct drm_file *filp)
 {
 	struct drm_radeon_gem_va *args = data;
 	struct drm_gem_object *gobj;
 	struct radeon_device *rdev = dev->dev_private;
 	struct radeon_fpriv *fpriv = filp->driver_priv;
 	struct radeon_bo *rbo;
 	struct radeon_bo_va *bo_va;
 	u32 invalid_flags;
 	int r = 0;

 	if (!rdev->vm_manager.enabled) {
 		args->operation = RADEON_VA_RESULT_ERROR;
 		return -ENOTTY;
 	}

 	/* !! DONT REMOVE !!
 	 * We don't support vm_id yet, to be sure we don't have have broken
 	 * userspace, reject anyone trying to use non 0 value thus moving
 	 * forward we can use those fields without breaking existant userspace
 	 */
 	if (args->vm_id) {
 		args->operation = RADEON_VA_RESULT_ERROR;
 		return -EINVAL;
 	}

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

 	/* don't remove, we need to enforce userspace to set the snooped flag
 	 * otherwise we will endup with broken userspace and we won't be able
 	 * to enable this feature without adding new interface
 	 */
 	invalid_flags = RADEON_VM_PAGE_VALID | RADEON_VM_PAGE_SYSTEM;
 	if ((args->flags & invalid_flags)) {
 		dev_err(&dev->pdev->dev, "invalid flags 0x%08X vs 0x%08X\n",
 			args->flags, invalid_flags);
 		args->operation = RADEON_VA_RESULT_ERROR;
 		return -EINVAL;
 	}
 	if (!(args->flags & RADEON_VM_PAGE_SNOOPED)) {
 		dev_err(&dev->pdev->dev, "only supported snooped mapping for now\n");
 		args->operation = RADEON_VA_RESULT_ERROR;
 		return -EINVAL;
 	}

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

 	gobj = drm_gem_object_lookup(dev, filp, args->handle);
 	if (gobj == NULL) {
 		args->operation = RADEON_VA_RESULT_ERROR;
 		return -ENOENT;
 	}
 	rbo = gem_to_radeon_bo(gobj);
 	r = radeon_bo_reserve(rbo, false);
 	if (r) {
 		args->operation = RADEON_VA_RESULT_ERROR;
 		drm_gem_object_unreference_unlocked(gobj);
 		return r;
 	}
 	switch (args->operation) {
 	case RADEON_VA_MAP:
 		bo_va = radeon_bo_va(rbo, &fpriv->vm);
 		if (bo_va) {
 			args->operation = RADEON_VA_RESULT_VA_EXIST;
 			args->offset = bo_va->soffset;
 			goto out;
 		}
 		r = radeon_vm_bo_add(rdev, &fpriv->vm, rbo,
 				     args->offset, args->flags);
 		break;
 	case RADEON_VA_UNMAP:
 		r = radeon_vm_bo_rmv(rdev, &fpriv->vm, rbo);
 		break;
 	default:
 		break;
 	}
 	args->operation = RADEON_VA_RESULT_OK;
 	if (r) {
 		args->operation = RADEON_VA_RESULT_ERROR;
 	}
 out:
 	radeon_bo_unreserve(rbo);
 	drm_gem_object_unreference_unlocked(gobj);
 	return r;
 }

 int radeon_mode_dumb_create(struct drm_file *file_priv,
 			    struct drm_device *dev,
 			    struct drm_mode_create_dumb *args)
 {
 	struct radeon_device *rdev = dev->dev_private;
 	struct drm_gem_object *gobj;
 	uint32_t handle;
 	int r;

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

 	r = radeon_gem_object_create(rdev, args->size, 0,
 				     RADEON_GEM_DOMAIN_VRAM,
 				     false, 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;
 }

 int radeon_mode_dumb_destroy(struct drm_file *file_priv,
 			     struct drm_device *dev,
 			     uint32_t handle)
 {
 	return drm_gem_handle_delete(file_priv, handle);
 }
	/*
	* 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 "drmP.h"
	#include "radeon_drm.h"
	#include "radeon.h"

	int radeon_gem_object_init(struct drm_gem_object *obj)
	{
	BUG();

	return 0;
	}

	void radeon_gem_object_free(struct drm_gem_object *gobj)
	{
	struct radeon_bo *robj = gem_to_radeon_bo(gobj);

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

	int radeon_gem_object_create(struct radeon_device *rdev, int size,
	int alignment, int initial_domain,
	bool discardable, bool kernel,
	struct drm_gem_object **obj)
	{
	struct radeon_bo *robj;
	int r;

	*obj = NULL;
	/* At least align on page size */
	if (alignment < PAGE_SIZE) {
	alignment = PAGE_SIZE;
	}
	r = radeon_bo_create(rdev, size, alignment, kernel, initial_domain, NULL, &robj);
	if (r) {
	if (r != -ERESTARTSYS)
	DRM_ERROR("Failed to allocate GEM object (%d, %d, %u, %d)\n",
	size, initial_domain, alignment, r);
	return r;
	}
	*obj = &robj->gem_base;

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

	return 0;
	}

	int radeon_gem_set_domain(struct drm_gem_object *gobj,
	uint32_t rdomain, uint32_t wdomain)
	{
	struct radeon_bo *robj;
	uint32_t domain;
	int r;

	/* FIXME: reeimplement */
	robj = gem_to_radeon_bo(gobj);
	/* work out where to validate the buffer to */
	domain = wdomain;
	if (!domain) {
	domain = rdomain;
	}
	if (!domain) {
	/* Do nothings */
	printk(KERN_WARNING "Set domain without domain !\n");
	return 0;
	}
	if (domain == RADEON_GEM_DOMAIN_CPU) {
	/* Asking for cpu access wait for object idle */
	r = radeon_bo_wait(robj, NULL, false);
	if (r) {
	printk(KERN_ERR "Failed to wait for object !\n");
	return r;
	}
	}
	return 0;
	}

	int radeon_gem_init(struct radeon_device *rdev)
	{
	INIT_LIST_HEAD(&rdev->gem.objects);
	return 0;
	}

	void radeon_gem_fini(struct radeon_device *rdev)
	{
	radeon_bo_force_delete(rdev);
	}

	/*
	* Call from drm_gem_handle_create which appear in both new and open ioctl
	* case.
	*/
	int radeon_gem_object_open(struct drm_gem_object obj, struct drm_file file_priv)
	{
	return 0;
	}

	void radeon_gem_object_close(struct drm_gem_object *obj,
	struct drm_file *file_priv)
	{
	struct radeon_bo *rbo = gem_to_radeon_bo(obj);
	struct radeon_device *rdev = rbo->rdev;
	struct radeon_fpriv *fpriv = file_priv->driver_priv;
	struct radeon_vm *vm = &fpriv->vm;

	if (rdev->family < CHIP_CAYMAN) {
	return;
	}

	if (radeon_bo_reserve(rbo, false)) {
	dev_err(rdev->dev, "leaking bo va because we fail to reserve bo\n");
	return;
	}
	radeon_vm_bo_rmv(rdev, vm, rbo);
	radeon_bo_unreserve(rbo);
	}

	static int radeon_gem_handle_lockup(struct radeon_device *rdev, int r)
	{
	if (r == -EDEADLK) {
	r = radeon_gpu_reset(rdev);
	if (!r)
	r = -EAGAIN;
	}
	return r;
	}

	/*
	* GEM ioctls.
	*/
	int radeon_gem_info_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	struct radeon_device *rdev = dev->dev_private;
	struct drm_radeon_gem_info *args = data;
	struct ttm_mem_type_manager *man;
	unsigned i;

	man = &rdev->mman.bdev.man[TTM_PL_VRAM];

	args->vram_size = rdev->mc.real_vram_size;
	args->vram_visible = (u64)man->size << PAGE_SHIFT;
	if (rdev->stollen_vga_memory)
	args->vram_visible -= radeon_bo_size(rdev->stollen_vga_memory);
	args->vram_visible -= radeon_fbdev_total_size(rdev);
	args->gart_size = rdev->mc.gtt_size - 4096 - RADEON_IB_POOL_SIZE641024;
	for(i = 0; i < RADEON_NUM_RINGS; ++i)
	args->gart_size -= rdev->ring[i].ring_size;
	return 0;
	}

	int radeon_gem_pread_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	/* TODO: implement */
	DRM_ERROR("unimplemented %s\n", __func__);
	return -ENOSYS;
	}

	int radeon_gem_pwrite_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	/* TODO: implement */
	DRM_ERROR("unimplemented %s\n", __func__);
	return -ENOSYS;
	}

	int radeon_gem_create_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	struct radeon_device *rdev = dev->dev_private;
	struct drm_radeon_gem_create *args = data;
	struct drm_gem_object *gobj;
	uint32_t handle;
	int r;

	down_read(&rdev->exclusive_lock);
	/* create a gem object to contain this object in */
	args->size = roundup(args->size, PAGE_SIZE);
	r = radeon_gem_object_create(rdev, args->size, args->alignment,
	args->initial_domain, false,
	false, &gobj);
	if (r) {
	up_read(&rdev->exclusive_lock);
	r = radeon_gem_handle_lockup(rdev, r);
	return r;
	}
	r = drm_gem_handle_create(filp, gobj, &handle);
	/* drop reference from allocate - handle holds it now */
	drm_gem_object_unreference_unlocked(gobj);
	if (r) {
	up_read(&rdev->exclusive_lock);
	r = radeon_gem_handle_lockup(rdev, r);
	return r;
	}
	args->handle = handle;
	up_read(&rdev->exclusive_lock);
	return 0;
	}

	int radeon_gem_set_domain_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	/* transition the BO to a domain -
	* just validate the BO into a certain domain */
	struct radeon_device *rdev = dev->dev_private;
	struct drm_radeon_gem_set_domain *args = data;
	struct drm_gem_object *gobj;
	struct radeon_bo *robj;
	int r;

	/* for now if someone requests domain CPU -
	* just make sure the buffer is finished with */
	down_read(&rdev->exclusive_lock);

	/* just do a BO wait for now */
	gobj = drm_gem_object_lookup(dev, filp, args->handle);
	if (gobj == NULL) {
	up_read(&rdev->exclusive_lock);
	return -ENOENT;
	}
	robj = gem_to_radeon_bo(gobj);

	r = radeon_gem_set_domain(gobj, args->read_domains, args->write_domain);

	drm_gem_object_unreference_unlocked(gobj);
	up_read(&rdev->exclusive_lock);
	r = radeon_gem_handle_lockup(robj->rdev, r);
	return r;
	}

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

	gobj = drm_gem_object_lookup(dev, filp, handle);
	if (gobj == NULL) {
	return -ENOENT;
	}
	robj = gem_to_radeon_bo(gobj);
	*offset_p = radeon_bo_mmap_offset(robj);
	drm_gem_object_unreference_unlocked(gobj);
	return 0;
	}

	int radeon_gem_mmap_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	struct drm_radeon_gem_mmap *args = data;

	return radeon_mode_dumb_mmap(filp, dev, args->handle, &args->addr_ptr);
	}

	int radeon_gem_busy_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	struct radeon_device *rdev = dev->dev_private;
	struct drm_radeon_gem_busy *args = data;
	struct drm_gem_object *gobj;
	struct radeon_bo *robj;
	int r;
	uint32_t cur_placement = 0;

	gobj = drm_gem_object_lookup(dev, filp, args->handle);
	if (gobj == NULL) {
	return -ENOENT;
	}
	robj = gem_to_radeon_bo(gobj);
	r = radeon_bo_wait(robj, &cur_placement, true);
	switch (cur_placement) {
	case TTM_PL_VRAM:
	args->domain = RADEON_GEM_DOMAIN_VRAM;
	break;
	case TTM_PL_TT:
	args->domain = RADEON_GEM_DOMAIN_GTT;
	break;
	case TTM_PL_SYSTEM:
	args->domain = RADEON_GEM_DOMAIN_CPU;
	default:
	break;
	}
	drm_gem_object_unreference_unlocked(gobj);
	r = radeon_gem_handle_lockup(rdev, r);
	return r;
	}

	int radeon_gem_wait_idle_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	struct radeon_device *rdev = dev->dev_private;
	struct drm_radeon_gem_wait_idle *args = data;
	struct drm_gem_object *gobj;
	struct radeon_bo *robj;
	int r;

	gobj = drm_gem_object_lookup(dev, filp, args->handle);
	if (gobj == NULL) {
	return -ENOENT;
	}
	robj = gem_to_radeon_bo(gobj);
	r = radeon_bo_wait(robj, NULL, false);
	/* callback hw specific functions if any */
	if (rdev->asic->ioctl_wait_idle)
	robj->rdev->asic->ioctl_wait_idle(rdev, robj);
	drm_gem_object_unreference_unlocked(gobj);
	r = radeon_gem_handle_lockup(rdev, r);
	return r;
	}

	int radeon_gem_set_tiling_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	struct drm_radeon_gem_set_tiling *args = data;
	struct drm_gem_object *gobj;
	struct radeon_bo *robj;
	int r = 0;

	DRM_DEBUG("%d \n", args->handle);
	gobj = drm_gem_object_lookup(dev, filp, args->handle);
	if (gobj == NULL)
	return -ENOENT;
	robj = gem_to_radeon_bo(gobj);
	r = radeon_bo_set_tiling_flags(robj, args->tiling_flags, args->pitch);
	drm_gem_object_unreference_unlocked(gobj);
	return r;
	}

	int radeon_gem_get_tiling_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	struct drm_radeon_gem_get_tiling *args = data;
	struct drm_gem_object *gobj;
	struct radeon_bo *rbo;
	int r = 0;

	DRM_DEBUG("\n");
	gobj = drm_gem_object_lookup(dev, filp, args->handle);
	if (gobj == NULL)
	return -ENOENT;
	rbo = gem_to_radeon_bo(gobj);
	r = radeon_bo_reserve(rbo, false);
	if (unlikely(r != 0))
	goto out;
	radeon_bo_get_tiling_flags(rbo, &args->tiling_flags, &args->pitch);
	radeon_bo_unreserve(rbo);
	out:
	drm_gem_object_unreference_unlocked(gobj);
	return r;
	}

	int radeon_gem_va_ioctl(struct drm_device dev, void data,
	struct drm_file *filp)
	{
	struct drm_radeon_gem_va *args = data;
	struct drm_gem_object *gobj;
	struct radeon_device *rdev = dev->dev_private;
	struct radeon_fpriv *fpriv = filp->driver_priv;
	struct radeon_bo *rbo;
	struct radeon_bo_va *bo_va;
	u32 invalid_flags;
	int r = 0;

	if (!rdev->vm_manager.enabled) {
	args->operation = RADEON_VA_RESULT_ERROR;
	return -ENOTTY;
	}

	/* !! DONT REMOVE !!
	* We don't support vm_id yet, to be sure we don't have have broken
	* userspace, reject anyone trying to use non 0 value thus moving
	* forward we can use those fields without breaking existant userspace
	*/
	if (args->vm_id) {
	args->operation = RADEON_VA_RESULT_ERROR;
	return -EINVAL;
	}

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

	/* don't remove, we need to enforce userspace to set the snooped flag
	* otherwise we will endup with broken userspace and we won't be able
	* to enable this feature without adding new interface
	*/
	invalid_flags = RADEON_VM_PAGE_VALID \| RADEON_VM_PAGE_SYSTEM;
	if ((args->flags & invalid_flags)) {
	dev_err(&dev->pdev->dev, "invalid flags 0x%08X vs 0x%08X\n",
	args->flags, invalid_flags);
	args->operation = RADEON_VA_RESULT_ERROR;
	return -EINVAL;
	}
	if (!(args->flags & RADEON_VM_PAGE_SNOOPED)) {
	dev_err(&dev->pdev->dev, "only supported snooped mapping for now\n");
	args->operation = RADEON_VA_RESULT_ERROR;
	return -EINVAL;
	}

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

	gobj = drm_gem_object_lookup(dev, filp, args->handle);
	if (gobj == NULL) {
	args->operation = RADEON_VA_RESULT_ERROR;
	return -ENOENT;
	}
	rbo = gem_to_radeon_bo(gobj);
	r = radeon_bo_reserve(rbo, false);
	if (r) {
	args->operation = RADEON_VA_RESULT_ERROR;
	drm_gem_object_unreference_unlocked(gobj);
	return r;
	}
	switch (args->operation) {
	case RADEON_VA_MAP:
	bo_va = radeon_bo_va(rbo, &fpriv->vm);
	if (bo_va) {
	args->operation = RADEON_VA_RESULT_VA_EXIST;
	args->offset = bo_va->soffset;
	goto out;
	}
	r = radeon_vm_bo_add(rdev, &fpriv->vm, rbo,
	args->offset, args->flags);
	break;
	case RADEON_VA_UNMAP:
	r = radeon_vm_bo_rmv(rdev, &fpriv->vm, rbo);
	break;
	default:
	break;
	}
	args->operation = RADEON_VA_RESULT_OK;
	if (r) {
	args->operation = RADEON_VA_RESULT_ERROR;
	}
	out:
	radeon_bo_unreserve(rbo);
	drm_gem_object_unreference_unlocked(gobj);
	return r;
	}

	int radeon_mode_dumb_create(struct drm_file *file_priv,
	struct drm_device *dev,
	struct drm_mode_create_dumb *args)
	{
	struct radeon_device *rdev = dev->dev_private;
	struct drm_gem_object *gobj;
	uint32_t handle;
	int r;

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

	r = radeon_gem_object_create(rdev, args->size, 0,
	RADEON_GEM_DOMAIN_VRAM,
	false, 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;
	}

	int radeon_mode_dumb_destroy(struct drm_file *file_priv,
	struct drm_device *dev,
	uint32_t handle)
	{
	return drm_gem_handle_delete(file_priv, handle);
	}