/*
 * Copyright 2013 Red Hat Inc.
 *
 * 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
 *          Alon Levy
 */

#include <drm/drm.h>
#include <drm/drm_print.h>

#include "qxl_drv.h"
#include "qxl_object.h"

void qxl_gem_object_free(struct drm_gem_object *gobj)
{
        struct qxl_bo *qobj = gem_to_qxl_bo(gobj);
        struct qxl_device *qdev;
        struct ttm_buffer_object *tbo;

        qdev = to_qxl(gobj->dev);

        qxl_surface_evict(qdev, qobj, false);

        tbo = &qobj->tbo;
        ttm_bo_fini(tbo);
}

int qxl_gem_object_create(struct qxl_device *qdev, int size,
                          int alignment, int initial_domain,
                          bool discardable, bool kernel,
                          struct qxl_surface *surf,
                          struct drm_gem_object **obj)
{
        struct qxl_bo *qbo;
        int r;

        *obj = NULL;
        /* At least align on page size */
        if (alignment < PAGE_SIZE)
                alignment = PAGE_SIZE;
        r = qxl_bo_create(qdev, size, kernel, false, initial_domain, 0, surf, &qbo);
        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 = &qbo->tbo.base;

        mutex_lock(&qdev->gem.mutex);
        list_add_tail(&qbo->list, &qdev->gem.objects);
        mutex_unlock(&qdev->gem.mutex);

        return 0;
}

/*
 * If the caller passed a valid gobj pointer, it is responsible to call
 * drm_gem_object_put() when it no longer needs to acess the object.
 *
 * If gobj is NULL, it is handled internally.
 */
int qxl_gem_object_create_with_handle(struct qxl_device *qdev,
                                      struct drm_file *file_priv,
                                      u32 domain,
                                      size_t size,
                                      struct qxl_surface *surf,
                                      struct drm_gem_object **gobj,
                                      uint32_t *handle)
{
        int r;
        struct drm_gem_object *local_gobj;

        BUG_ON(!handle);

        r = qxl_gem_object_create(qdev, size, 0,
                                  domain,
                                  false, false, surf,
                                  &local_gobj);
        if (r)
                return -ENOMEM;
        r = drm_gem_handle_create(file_priv, local_gobj, handle);
        if (r)
                return r;

        if (gobj)
                *gobj = local_gobj;
        else
                /* drop reference from allocate - handle holds it now */
                drm_gem_object_put(local_gobj);

        return 0;
}

int qxl_gem_object_open(struct drm_gem_object *obj, struct drm_file *file_priv)
{
        return 0;
}

void qxl_gem_object_close(struct drm_gem_object *obj,
                          struct drm_file *file_priv)
{
}

void qxl_gem_init(struct qxl_device *qdev)
{
        INIT_LIST_HEAD(&qdev->gem.objects);
}

void qxl_gem_fini(struct qxl_device *qdev)
{
        qxl_bo_force_delete(qdev);
}