mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 19:03:28 +07:00
69977ff55e
Also provide a completely dumb dma-buf ops implementation. Once we have other virtual dma-buf aware devices, we need to provide something better. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
138 lines
3.9 KiB
C
138 lines
3.9 KiB
C
/**************************************************************************
|
|
*
|
|
* Copyright © 2013 VMware, Inc., Palo Alto, CA., USA
|
|
* All Rights Reserved.
|
|
*
|
|
* 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 device *target_dev,
|
|
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_atomic(struct dma_buf *dma_buf,
|
|
unsigned long page_num)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static void vmw_prime_dmabuf_kunmap_atomic(struct dma_buf *dma_buf,
|
|
unsigned long page_num, void *addr)
|
|
{
|
|
|
|
}
|
|
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,
|
|
.kmap = vmw_prime_dmabuf_kmap,
|
|
.kmap_atomic = vmw_prime_dmabuf_kmap_atomic,
|
|
.kunmap = vmw_prime_dmabuf_kunmap,
|
|
.kunmap_atomic = vmw_prime_dmabuf_kunmap_atomic,
|
|
.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);
|
|
}
|