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// SPDX-License-Identifier: GPL-2.0 OR MIT
/**************************************************************************
*
* Copyright 2013 VMware, Inc., Palo Alto, CA., USA
*
* 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 <linux/dma-buf.h>
#include <drm/ttm/ttm_object.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)
{
}
static void *vmw_prime_dmabuf_vmap(struct dma_buf *dma_buf)
{
return NULL;
}
static void vmw_prime_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr)
{
}
static void *vmw_prime_dmabuf_kmap(struct dma_buf *dma_buf,
unsigned long page_num)
{
return NULL;
}
static void vmw_prime_dmabuf_kunmap(struct dma_buf *dma_buf,
unsigned long page_num, void *addr)
{
}
static int vmw_prime_dmabuf_mmap(struct dma_buf *dma_buf,
struct vm_area_struct *vma)
{
WARN_ONCE(true, "Attempted use of dmabuf mmap. Bad.\n");
return -ENOSYS;
}
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,
.map = vmw_prime_dmabuf_kmap,
.unmap = vmw_prime_dmabuf_kunmap,
.mmap = vmw_prime_dmabuf_mmap,
.vmap = vmw_prime_dmabuf_vmap,
.vunmap = vmw_prime_dmabuf_vunmap,
};
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;
return ttm_prime_fd_to_handle(tfile, fd, handle);
}
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 ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
return ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd);
}
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