// SPDX-License-Identifier: GPL-2.0 OR MIT
/**************************************************************************
 *
 * Copyright (c) 2013-2024 Broadcom. All Rights Reserved. The term
 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
 *
 * 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, sub license, 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 (including the
 * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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:
 *     Thomas Hellstrom <thellstrom@vmware.com>
 *
 */

#include "vmwgfx_drv.h"
#include "vmwgfx_bo.h"
#include "ttm_object.h"
#include <linux/dma-buf.h>

/*
 * DMA-BUF attach- and mapping methods. No need to implement
 * these until we have other virtual devices use them.
 */

static int vmw_prime_map_attach(struct dma_buf *dma_buf,
                                struct dma_buf_attachment *attach)
{
        return -ENOSYS;
}

static void vmw_prime_map_detach(struct dma_buf *dma_buf,
                                 struct dma_buf_attachment *attach)
{
}

static struct sg_table *vmw_prime_map_dma_buf(struct dma_buf_attachment *attach,
                                              enum dma_data_direction dir)
{
        return ERR_PTR(-ENOSYS);
}

static void vmw_prime_unmap_dma_buf(struct dma_buf_attachment *attach,
                                    struct sg_table *sgb,
                                    enum dma_data_direction dir)
{
}

const struct dma_buf_ops vmw_prime_dmabuf_ops =  {
        .attach = vmw_prime_map_attach,
        .detach = vmw_prime_map_detach,
        .map_dma_buf = vmw_prime_map_dma_buf,
        .unmap_dma_buf = vmw_prime_unmap_dma_buf,
        .release = NULL,
};

int vmw_prime_fd_to_handle(struct drm_device *dev,
                           struct drm_file *file_priv,
                           int fd, u32 *handle)
{
        struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
        int ret = ttm_prime_fd_to_handle(tfile, fd, handle);

        if (ret)
                ret = drm_gem_prime_fd_to_handle(dev, file_priv, fd, handle);

        return ret;
}

int vmw_prime_handle_to_fd(struct drm_device *dev,
                           struct drm_file *file_priv,
                           uint32_t handle, uint32_t flags,
                           int *prime_fd)
{
        struct vmw_private *vmw = vmw_priv(dev);
        struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
        struct vmw_bo *vbo;
        int ret;
        int surf_handle;

        if (handle > VMWGFX_NUM_MOB) {
                ret = ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd);
        } else {
                ret = vmw_user_bo_lookup(file_priv, handle, &vbo);
                if (ret)
                        return ret;
                if (vbo && vbo->is_dumb) {
                        ret = drm_gem_prime_handle_to_fd(dev, file_priv, handle,
                                                         flags, prime_fd);
                } else {
                        surf_handle = vmw_lookup_surface_handle_for_buffer(vmw,
                                                                           vbo,
                                                                           handle);
                        if (surf_handle > 0)
                                ret = ttm_prime_handle_to_fd(tfile, surf_handle,
                                                             flags, prime_fd);
                        else
                                ret = drm_gem_prime_handle_to_fd(dev, file_priv,
                                                                 handle, flags,
                                                                 prime_fd);
                }
                vmw_user_bo_unref(&vbo);
        }

        return ret;
}