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/*

 * 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 = gem_to_radeon_bo(gobj);

	if (robj) {

		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, &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_object_pin(struct drm_gem_object *obj, uint32_t pin_domain,

			  uint64_t *gpu_addr)

{

	struct radeon_bo *robj = gem_to_radeon_bo(obj);

	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 = gem_to_radeon_bo(obj);

	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 = 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 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_object_force_delete(rdev);

}

#if 0

/*

 * 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;

	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 - 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 = gem_to_radeon_bo(gobj);

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

	drm_gem_object_unreference_unlocked(gobj);

	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 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);

	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 = gem_to_radeon_bo(gobj);

	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 = 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;

}

#endif