1/************************************************************************** 2 * 3 * Copyright © 2013 VMware, Inc., Palo Alto, CA., USA 4 * All Rights Reserved. 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 <linux/dma-buf.h> 35#include <drm/ttm/ttm_object.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 device *target_dev, 44 struct dma_buf_attachment *attach) 45{ 46 return -ENOSYS; 47} 48 49static void vmw_prime_map_detach(struct dma_buf *dma_buf, 50 struct dma_buf_attachment *attach) 51{ 52} 53 54static struct sg_table *vmw_prime_map_dma_buf(struct dma_buf_attachment *attach, 55 enum dma_data_direction dir) 56{ 57 return ERR_PTR(-ENOSYS); 58} 59 60static void vmw_prime_unmap_dma_buf(struct dma_buf_attachment *attach, 61 struct sg_table *sgb, 62 enum dma_data_direction dir) 63{ 64} 65 66static void *vmw_prime_dmabuf_vmap(struct dma_buf *dma_buf) 67{ 68 return NULL; 69} 70 71static void vmw_prime_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr) 72{ 73} 74 75static void *vmw_prime_dmabuf_kmap_atomic(struct dma_buf *dma_buf, 76 unsigned long page_num) 77{ 78 return NULL; 79} 80 81static void vmw_prime_dmabuf_kunmap_atomic(struct dma_buf *dma_buf, 82 unsigned long page_num, void *addr) 83{ 84 85} 86static void *vmw_prime_dmabuf_kmap(struct dma_buf *dma_buf, 87 unsigned long page_num) 88{ 89 return NULL; 90} 91 92static void vmw_prime_dmabuf_kunmap(struct dma_buf *dma_buf, 93 unsigned long page_num, void *addr) 94{ 95 96} 97 98static int vmw_prime_dmabuf_mmap(struct dma_buf *dma_buf, 99 struct vm_area_struct *vma) 100{ 101 WARN_ONCE(true, "Attempted use of dmabuf mmap. Bad.\n"); 102 return -ENOSYS; 103} 104 105const struct dma_buf_ops vmw_prime_dmabuf_ops = { 106 .attach = vmw_prime_map_attach, 107 .detach = vmw_prime_map_detach, 108 .map_dma_buf = vmw_prime_map_dma_buf, 109 .unmap_dma_buf = vmw_prime_unmap_dma_buf, 110 .release = NULL, 111 .kmap = vmw_prime_dmabuf_kmap, 112 .kmap_atomic = vmw_prime_dmabuf_kmap_atomic, 113 .kunmap = vmw_prime_dmabuf_kunmap, 114 .kunmap_atomic = vmw_prime_dmabuf_kunmap_atomic, 115 .mmap = vmw_prime_dmabuf_mmap, 116 .vmap = vmw_prime_dmabuf_vmap, 117 .vunmap = vmw_prime_dmabuf_vunmap, 118}; 119 120int vmw_prime_fd_to_handle(struct drm_device *dev, 121 struct drm_file *file_priv, 122 int fd, u32 *handle) 123{ 124 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; 125 126 return ttm_prime_fd_to_handle(tfile, fd, handle); 127} 128 129int vmw_prime_handle_to_fd(struct drm_device *dev, 130 struct drm_file *file_priv, 131 uint32_t handle, uint32_t flags, 132 int *prime_fd) 133{ 134 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; 135 136 return ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd); 137} 138