text: /*
   * 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 "drm.h"
  #include "radeon_drm.h"
  #include "radeon.h"
  
  int radeon_gem_object_init(struct drm_gem_object *obj)
  {
  	/* we do nothings here */
  	return 0;
  }
  
  void radeon_gem_object_free(struct drm_gem_object *gobj)
  {
  	struct radeon_bo *robj = gobj->driver_private;
  
  	gobj->driver_private = NULL;
  	if (robj) {
  		radeon_bo_unref(&robj);
  	}
  
  	drm_gem_object_release(gobj);
  	kfree(gobj);
  }
  
  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 drm_gem_object *gobj;
  	struct radeon_bo *robj;
  	int r;
  
  	*obj = NULL;
  	gobj = drm_gem_object_alloc(rdev->ddev, size);
  	if (!gobj) {
  		return -ENOMEM;
  	}
  	/* At least align on page size */
  	if (alignment < PAGE_SIZE) {
  		alignment = PAGE_SIZE;
  	}
  	r = radeon_bo_create(rdev, gobj, size, kernel, initial_domain, &robj);
  	if (r) {
  		if (r != -ERESTARTSYS)
  			DRM_ERROR("Failed to allocate GEM object (%d, %d, %u, %d)\n",
  				  size, initial_domain, alignment, r);
  		drm_gem_object_unreference_unlocked(gobj);
  		return r;
  	}
  	gobj->driver_private = robj;
  	*obj = gobj;
  	return 0;
  }
  
  int radeon_gem_object_pin(struct drm_gem_object *obj, uint32_t pin_domain,
  			  uint64_t *gpu_addr)
  {
  	struct radeon_bo *robj = obj->driver_private;
  	int r;
  
  	r = radeon_bo_reserve(robj, false);
  	if (unlikely(r != 0))
  		return r;
  	r = radeon_bo_pin(robj, pin_domain, gpu_addr);
  	radeon_bo_unreserve(robj);
  	return r;
  }
  
  void radeon_gem_object_unpin(struct drm_gem_object *obj)
  {
  	struct radeon_bo *robj = obj->driver_private;
  	int r;
  
  	r = radeon_bo_reserve(robj, false);
  	if (likely(r == 0)) {
  		radeon_bo_unpin(robj);
  		radeon_bo_unreserve(robj);
  	}
  }
  
  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 = gobj->driver_private;
  	/* work out where to validate the buffer to */
  	domain = wdomain;
  	if (!domain) {
  		domain = rdomain;
  	}
  	if (!domain) {
  		/* Do nothings */
  		printk(KERN_WARNING "Set domain withou 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);
  }
  
  
  /*
   * 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;
  
  	args->vram_size = rdev->mc.real_vram_size;
  	args->vram_visible = rdev->mc.real_vram_size;
  	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 - rdev->cp.ring_size - 4096 -
  		RADEON_IB_POOL_SIZE*64*1024;
  	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;
  
  	/* 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) {
  		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) {
  		return r;
  	}
  	args->handle = handle;
  	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 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 */
  
  	/* just do a BO wait for now */
  	gobj = drm_gem_object_lookup(dev, filp, args->handle);
  	if (gobj == NULL) {
  		return -ENOENT;
  	}
  	robj = gobj->driver_private;
  
  	r = radeon_gem_set_domain(gobj, args->read_domains, args->write_domain);
  
  	drm_gem_object_unreference_unlocked(gobj);
  	return r;
  }
  
  int radeon_gem_mmap_ioctl(struct drm_device *dev, void *data,
  			  struct drm_file *filp)
  {
  	struct drm_radeon_gem_mmap *args = data;
  	struct drm_gem_object *gobj;
  	struct radeon_bo *robj;
  
  	gobj = drm_gem_object_lookup(dev, filp, args->handle);
  	if (gobj == NULL) {
  		return -ENOENT;
  	}
  	robj = gobj->driver_private;
  	args->addr_ptr = radeon_bo_mmap_offset(robj);
  	drm_gem_object_unreference_unlocked(gobj);
  	return 0;
  }
  
  int radeon_gem_busy_ioctl(struct drm_device *dev, void *data,
  			  struct drm_file *filp)
  {
  	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 = gobj->driver_private;
  	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);
  	return r;
  }
  
  int radeon_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
  			      struct drm_file *filp)
  {
  	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 = gobj->driver_private;
  	r = radeon_bo_wait(robj, NULL, false);
  	/* callback hw specific functions if any */
  	if (robj->rdev->asic->ioctl_wait_idle)
  		robj->rdev->asic->ioctl_wait_idle(robj->rdev, robj);
  	drm_gem_object_unreference_unlocked(gobj);
  	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 = gobj->driver_private;
  	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 = gobj->driver_private;
  	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;
  }
  