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>
137 lines
3.9 KiB
C
137 lines
3.9 KiB
C
/**************************************************************************
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*
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* Copyright © 2013 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Authors:
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* Thomas Hellstrom <thellstrom@vmware.com>
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*
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*/
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#include "vmwgfx_drv.h"
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#include <linux/dma-buf.h>
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#include <drm/ttm/ttm_object.h>
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/*
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* DMA-BUF attach- and mapping methods. No need to implement
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* these until we have other virtual devices use them.
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*/
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static int vmw_prime_map_attach(struct dma_buf *dma_buf,
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struct device *target_dev,
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struct dma_buf_attachment *attach)
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{
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return -ENOSYS;
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}
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static void vmw_prime_map_detach(struct dma_buf *dma_buf,
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struct dma_buf_attachment *attach)
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{
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}
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static struct sg_table *vmw_prime_map_dma_buf(struct dma_buf_attachment *attach,
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enum dma_data_direction dir)
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{
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return ERR_PTR(-ENOSYS);
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}
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static void vmw_prime_unmap_dma_buf(struct dma_buf_attachment *attach,
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struct sg_table *sgb,
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enum dma_data_direction dir)
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{
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}
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static void *vmw_prime_dmabuf_vmap(struct dma_buf *dma_buf)
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{
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return NULL;
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}
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static void vmw_prime_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr)
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{
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}
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static void *vmw_prime_dmabuf_kmap_atomic(struct dma_buf *dma_buf,
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unsigned long page_num)
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{
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return NULL;
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}
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static void vmw_prime_dmabuf_kunmap_atomic(struct dma_buf *dma_buf,
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unsigned long page_num, void *addr)
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{
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}
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static void *vmw_prime_dmabuf_kmap(struct dma_buf *dma_buf,
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unsigned long page_num)
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{
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return NULL;
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}
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static void vmw_prime_dmabuf_kunmap(struct dma_buf *dma_buf,
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unsigned long page_num, void *addr)
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{
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}
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static int vmw_prime_dmabuf_mmap(struct dma_buf *dma_buf,
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struct vm_area_struct *vma)
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{
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WARN_ONCE(true, "Attempted use of dmabuf mmap. Bad.\n");
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return -ENOSYS;
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}
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const struct dma_buf_ops vmw_prime_dmabuf_ops = {
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.attach = vmw_prime_map_attach,
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.detach = vmw_prime_map_detach,
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.map_dma_buf = vmw_prime_map_dma_buf,
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.unmap_dma_buf = vmw_prime_unmap_dma_buf,
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.release = NULL,
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.kmap = vmw_prime_dmabuf_kmap,
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.kmap_atomic = vmw_prime_dmabuf_kmap_atomic,
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.kunmap = vmw_prime_dmabuf_kunmap,
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.kunmap_atomic = vmw_prime_dmabuf_kunmap_atomic,
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.mmap = vmw_prime_dmabuf_mmap,
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.vmap = vmw_prime_dmabuf_vmap,
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.vunmap = vmw_prime_dmabuf_vunmap,
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};
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int vmw_prime_fd_to_handle(struct drm_device *dev,
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struct drm_file *file_priv,
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int fd, u32 *handle)
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{
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struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
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return ttm_prime_fd_to_handle(tfile, fd, handle);
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}
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int vmw_prime_handle_to_fd(struct drm_device *dev,
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struct drm_file *file_priv,
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uint32_t handle, uint32_t flags,
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int *prime_fd)
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{
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struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
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return ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd);
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}
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