Commit | Line | Data |
---|---|---|
dff96888 | 1 | // SPDX-License-Identifier: GPL-2.0 OR MIT |
fb1d9738 JB |
2 | /************************************************************************** |
3 | * | |
dff96888 | 4 | * Copyright 2009-2011 VMware, Inc., Palo Alto, CA., USA |
fb1d9738 JB |
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 | ||
fb1d9738 JB |
28 | #include "vmwgfx_drv.h" |
29 | ||
8afa13a0 ZR |
30 | static int vmw_bo_vm_lookup(struct ttm_device *bdev, |
31 | struct drm_file *filp, | |
32 | unsigned long offset, | |
33 | unsigned long pages, | |
34 | struct ttm_buffer_object **p_bo) | |
e65d096f TZ |
35 | { |
36 | struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev); | |
37 | struct drm_device *drm = &dev_priv->drm; | |
38 | struct drm_vma_offset_node *node; | |
8afa13a0 ZR |
39 | int ret; |
40 | ||
41 | *p_bo = NULL; | |
e65d096f TZ |
42 | |
43 | drm_vma_offset_lock_lookup(bdev->vma_manager); | |
44 | ||
45 | node = drm_vma_offset_lookup_locked(bdev->vma_manager, offset, pages); | |
46 | if (likely(node)) { | |
8afa13a0 | 47 | *p_bo = container_of(node, struct ttm_buffer_object, |
e65d096f | 48 | base.vma_node); |
8afa13a0 | 49 | *p_bo = ttm_bo_get_unless_zero(*p_bo); |
e65d096f TZ |
50 | } |
51 | ||
52 | drm_vma_offset_unlock_lookup(bdev->vma_manager); | |
53 | ||
8afa13a0 | 54 | if (!*p_bo) { |
e65d096f | 55 | drm_err(drm, "Could not find buffer object to map\n"); |
8afa13a0 ZR |
56 | return -EINVAL; |
57 | } | |
58 | ||
59 | if (!drm_vma_node_is_allowed(node, filp)) { | |
60 | ret = -EACCES; | |
61 | goto out_no_access; | |
62 | } | |
e65d096f | 63 | |
8afa13a0 ZR |
64 | return 0; |
65 | out_no_access: | |
66 | ttm_bo_put(*p_bo); | |
67 | return ret; | |
e65d096f TZ |
68 | } |
69 | ||
fb1d9738 JB |
70 | int vmw_mmap(struct file *filp, struct vm_area_struct *vma) |
71 | { | |
b7468b15 TH |
72 | static const struct vm_operations_struct vmw_vm_ops = { |
73 | .pfn_mkwrite = vmw_bo_vm_mkwrite, | |
74 | .page_mkwrite = vmw_bo_vm_mkwrite, | |
75 | .fault = vmw_bo_vm_fault, | |
76 | .open = ttm_bo_vm_open, | |
75390281 | 77 | .close = ttm_bo_vm_close, |
b7468b15 | 78 | }; |
bed2dd84 TZ |
79 | struct drm_file *file_priv = filp->private_data; |
80 | struct vmw_private *dev_priv = vmw_priv(file_priv->minor->dev); | |
e65d096f TZ |
81 | struct ttm_device *bdev = &dev_priv->bdev; |
82 | struct ttm_buffer_object *bo; | |
83 | int ret; | |
84 | ||
85 | if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET_START)) | |
86 | return -EINVAL; | |
87 | ||
8afa13a0 | 88 | ret = vmw_bo_vm_lookup(bdev, file_priv, vma->vm_pgoff, vma_pages(vma), &bo); |
e65d096f | 89 | if (unlikely(ret != 0)) |
8afa13a0 | 90 | return ret; |
e65d096f TZ |
91 | |
92 | ret = ttm_bo_mmap_obj(vma, bo); | |
93 | if (unlikely(ret != 0)) | |
94 | goto out_unref; | |
b7468b15 TH |
95 | |
96 | vma->vm_ops = &vmw_vm_ops; | |
97 | ||
b2041425 | 98 | /* Use VM_PFNMAP rather than VM_MIXEDMAP if not a COW mapping */ |
ca6eb14d | 99 | if (!is_cow_mapping(vma->vm_flags)) |
b2041425 TH |
100 | vma->vm_flags = (vma->vm_flags & ~VM_MIXEDMAP) | VM_PFNMAP; |
101 | ||
e65d096f TZ |
102 | ttm_bo_put(bo); /* release extra ref taken by ttm_bo_mmap_obj() */ |
103 | ||
b7468b15 | 104 | return 0; |
e65d096f TZ |
105 | |
106 | out_unref: | |
107 | ttm_bo_put(bo); | |
108 | return ret; | |
fb1d9738 JB |
109 | } |
110 |