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      1 /*	$NetBSD: vmwgfx_prime.c,v 1.3 2021/12/18 23:45:45 riastradh Exp $	*/
      2 
      3 // SPDX-License-Identifier: GPL-2.0 OR MIT
      4 /**************************************************************************
      5  *
      6  * Copyright 2013 VMware, Inc., Palo Alto, CA., USA
      7  *
      8  * Permission is hereby granted, free of charge, to any person obtaining a
      9  * copy of this software and associated documentation files (the
     10  * "Software"), to deal in the Software without restriction, including
     11  * without limitation the rights to use, copy, modify, merge, publish,
     12  * distribute, sub license, and/or sell copies of the Software, and to
     13  * permit persons to whom the Software is furnished to do so, subject to
     14  * the following conditions:
     15  *
     16  * The above copyright notice and this permission notice (including the
     17  * next paragraph) shall be included in all copies or substantial portions
     18  * of the Software.
     19  *
     20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     22  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
     23  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
     24  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
     25  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
     26  * USE OR OTHER DEALINGS IN THE SOFTWARE.
     27  *
     28  **************************************************************************/
     29 /*
     30  * Authors:
     31  *     Thomas Hellstrom <thellstrom (at) vmware.com>
     32  *
     33  */
     34 
     35 #include <sys/cdefs.h>
     36 __KERNEL_RCSID(0, "$NetBSD: vmwgfx_prime.c,v 1.3 2021/12/18 23:45:45 riastradh Exp $");
     37 
     38 #include "vmwgfx_drv.h"
     39 #include "ttm_object.h"
     40 #include <linux/dma-buf.h>
     41 
     42 /*
     43  * DMA-BUF attach- and mapping methods. No need to implement
     44  * these until we have other virtual devices use them.
     45  */
     46 
     47 static int vmw_prime_map_attach(struct dma_buf *dma_buf,
     48 				struct dma_buf_attachment *attach)
     49 {
     50 	return -ENOSYS;
     51 }
     52 
     53 static void vmw_prime_map_detach(struct dma_buf *dma_buf,
     54 				 struct dma_buf_attachment *attach)
     55 {
     56 }
     57 
     58 static struct sg_table *vmw_prime_map_dma_buf(struct dma_buf_attachment *attach,
     59 					      enum dma_data_direction dir)
     60 {
     61 	return ERR_PTR(-ENOSYS);
     62 }
     63 
     64 static void vmw_prime_unmap_dma_buf(struct dma_buf_attachment *attach,
     65 				    struct sg_table *sgb,
     66 				    enum dma_data_direction dir)
     67 {
     68 }
     69 
     70 const struct dma_buf_ops vmw_prime_dmabuf_ops =  {
     71 	.attach = vmw_prime_map_attach,
     72 	.detach = vmw_prime_map_detach,
     73 	.map_dma_buf = vmw_prime_map_dma_buf,
     74 	.unmap_dma_buf = vmw_prime_unmap_dma_buf,
     75 	.release = NULL,
     76 };
     77 
     78 int vmw_prime_fd_to_handle(struct drm_device *dev,
     79 			   struct drm_file *file_priv,
     80 			   int fd, u32 *handle)
     81 {
     82 	struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
     83 
     84 	return ttm_prime_fd_to_handle(tfile, fd, handle);
     85 }
     86 
     87 int vmw_prime_handle_to_fd(struct drm_device *dev,
     88 			   struct drm_file *file_priv,
     89 			   uint32_t handle, uint32_t flags,
     90 			   int *prime_fd)
     91 {
     92 	struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
     93 
     94 	return ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd);
     95 }
     96