1 // SPDX-License-Identifier: GPL-2.0 OR MIT 2 /************************************************************************** 3 * 4 * Copyright (c) 2013-2024 Broadcom. All Rights Reserved. The term 5 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, sub license, and/or sell copies of the Software, and to 12 * permit persons to whom the Software is furnished to do so, subject to 13 * the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the 16 * next paragraph) shall be included in all copies or substantial portions 17 * of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 22 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 23 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 24 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 25 * USE OR OTHER DEALINGS IN THE SOFTWARE. 26 * 27 **************************************************************************/ 28 /* 29 * Authors: 30 * Thomas Hellstrom <thellstrom@vmware.com> 31 * 32 */ 33 34 #include "vmwgfx_drv.h" 35 #include "vmwgfx_bo.h" 36 #include "ttm_object.h" 37 #include <linux/dma-buf.h> 38 39 /* 40 * DMA-BUF attach- and mapping methods. No need to implement 41 * these until we have other virtual devices use them. 42 */ 43 44 static int vmw_prime_map_attach(struct dma_buf *dma_buf, 45 struct dma_buf_attachment *attach) 46 { 47 return -ENOSYS; 48 } 49 50 static void vmw_prime_map_detach(struct dma_buf *dma_buf, 51 struct dma_buf_attachment *attach) 52 { 53 } 54 55 static struct sg_table *vmw_prime_map_dma_buf(struct dma_buf_attachment *attach, 56 enum dma_data_direction dir) 57 { 58 return ERR_PTR(-ENOSYS); 59 } 60 61 static void vmw_prime_unmap_dma_buf(struct dma_buf_attachment *attach, 62 struct sg_table *sgb, 63 enum dma_data_direction dir) 64 { 65 } 66 67 const struct dma_buf_ops vmw_prime_dmabuf_ops = { 68 .attach = vmw_prime_map_attach, 69 .detach = vmw_prime_map_detach, 70 .map_dma_buf = vmw_prime_map_dma_buf, 71 .unmap_dma_buf = vmw_prime_unmap_dma_buf, 72 .release = NULL, 73 }; 74 75 int vmw_prime_fd_to_handle(struct drm_device *dev, 76 struct drm_file *file_priv, 77 int fd, u32 *handle) 78 { 79 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; 80 int ret = ttm_prime_fd_to_handle(tfile, fd, handle); 81 82 if (ret) 83 ret = drm_gem_prime_fd_to_handle(dev, file_priv, fd, handle); 84 85 return ret; 86 } 87 88 int vmw_prime_handle_to_fd(struct drm_device *dev, 89 struct drm_file *file_priv, 90 uint32_t handle, uint32_t flags, 91 int *prime_fd) 92 { 93 struct vmw_private *vmw = vmw_priv(dev); 94 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; 95 struct vmw_bo *vbo; 96 int ret; 97 int surf_handle; 98 99 if (handle > VMWGFX_NUM_MOB) { 100 ret = ttm_prime_handle_to_fd(tfile, handle, flags, prime_fd); 101 } else { 102 ret = vmw_user_bo_lookup(file_priv, handle, &vbo); 103 if (ret) 104 return ret; 105 if (vbo && vbo->is_dumb) { 106 ret = drm_gem_prime_handle_to_fd(dev, file_priv, handle, 107 flags, prime_fd); 108 } else { 109 surf_handle = vmw_lookup_surface_handle_for_buffer(vmw, 110 vbo, 111 handle); 112 if (surf_handle > 0) 113 ret = ttm_prime_handle_to_fd(tfile, surf_handle, 114 flags, prime_fd); 115 else 116 ret = drm_gem_prime_handle_to_fd(dev, file_priv, 117 handle, flags, 118 prime_fd); 119 } 120 vmw_user_bo_unref(&vbo); 121 } 122 123 return ret; 124 } 125