1// SPDX-License-Identifier: GPL-2.0 OR MIT
  2/**************************************************************************
  3 *
  4 * Copyright 2013 VMware, Inc., Palo Alto, CA., USA
  5 *
  6 * Permission is hereby granted, free of charge, to any person obtaining a
  7 * copy of this software and associated documentation files (the
  8 * "Software"), to deal in the Software without restriction, including
  9 * without limitation the rights to use, copy, modify, merge, publish,
 10 * distribute, sub license, and/or sell copies of the Software, and to
 11 * permit persons to whom the Software is furnished to do so, subject to
 12 * the following conditions:
 13 *
 14 * The above copyright notice and this permission notice (including the
 15 * next paragraph) shall be included in all copies or substantial portions
 16 * of the Software.
 17 *
 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 25 *
 26 **************************************************************************/
 27/*
 28 * Authors:
 29 *     Thomas Hellstrom <thellstrom@vmware.com>
 30 *
 31 */
 32
 33#include "vmwgfx_drv.h"
 34#include "ttm_object.h"
 35#include <linux/dma-buf.h>
 36
 37/*
 38 * DMA-BUF attach- and mapping methods. No need to implement
 39 * these until we have other virtual devices use them.
 40 */
 41
 42static int vmw_prime_map_attach(struct dma_buf *dma_buf,
 43				struct dma_buf_attachment *attach)
 44{
 45	return -ENOSYS;
 46}
 47
 48static void vmw_prime_map_detach(struct dma_buf *dma_buf,
 49				 struct dma_buf_attachment *attach)
 50{
 51}
 52
 53static struct sg_table *vmw_prime_map_dma_buf(struct dma_buf_attachment *attach,
 54					      enum dma_data_direction dir)
 55{
 56	return ERR_PTR(-ENOSYS);
 57}
 58
 59static void vmw_prime_unmap_dma_buf(struct dma_buf_attachment *attach,
 60				    struct sg_table *sgb,
 61				    enum dma_data_direction dir)
 62{
 63}
 64
 65const struct dma_buf_ops vmw_prime_dmabuf_ops =  {
 66	.attach = vmw_prime_map_attach,
 67	.detach = vmw_prime_map_detach,
 68	.map_dma_buf = vmw_prime_map_dma_buf,
 69	.unmap_dma_buf = vmw_prime_unmap_dma_buf,
 70	.release = NULL,
 71};
 72
 73int vmw_prime_fd_to_handle(struct drm_device *dev,
 74			   struct drm_file *file_priv,
 75			   int fd, u32 *handle)
 76{
 77	struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 78	int ret = ttm_prime_fd_to_handle(tfile, fd, handle);
 79
 80	if (ret)
 81		ret = drm_gem_prime_fd_to_handle(dev, file_priv, fd, handle);
 82
 83	return ret;
 84}
 85
 86int vmw_prime_handle_to_fd(struct drm_device *dev,
 87			   struct drm_file *file_priv,
 88			   uint32_t handle, uint32_t flags,
 89			   int *prime_fd)
 90{
 91	struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 92	int ret;
 93
 94	if (handle > VMWGFX_NUM_MOB)
 95		ret = ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd);
 96	else
 97		ret = drm_gem_prime_handle_to_fd(dev, file_priv, handle, flags, prime_fd);
 98
 99	return ret;
100}