cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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vmwgfx_prime.c (2901B)

      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
     79	return ttm_prime_fd_to_handle(tfile, fd, handle);
     80}
     81
     82int vmw_prime_handle_to_fd(struct drm_device *dev,
     83			   struct drm_file *file_priv,
     84			   uint32_t handle, uint32_t flags,
     85			   int *prime_fd)
     86{
     87	struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
     88	return ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd);
     89}