• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 // SPDX-License-Identifier: GPL-2.0 OR MIT
2 /**************************************************************************
3  *
4  * Copyright 2009-2011 VMware, Inc., Palo Alto, CA., USA
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 #include "vmwgfx_drv.h"
29 
vmw_bo_vm_lookup(struct ttm_device * bdev,unsigned long offset,unsigned long pages)30 static struct ttm_buffer_object *vmw_bo_vm_lookup(struct ttm_device *bdev,
31 						  unsigned long offset,
32 						  unsigned long pages)
33 {
34 	struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
35 	struct drm_device *drm = &dev_priv->drm;
36 	struct drm_vma_offset_node *node;
37 	struct ttm_buffer_object *bo = NULL;
38 
39 	drm_vma_offset_lock_lookup(bdev->vma_manager);
40 
41 	node = drm_vma_offset_lookup_locked(bdev->vma_manager, offset, pages);
42 	if (likely(node)) {
43 		bo = container_of(node, struct ttm_buffer_object,
44 				  base.vma_node);
45 		bo = ttm_bo_get_unless_zero(bo);
46 	}
47 
48 	drm_vma_offset_unlock_lookup(bdev->vma_manager);
49 
50 	if (!bo)
51 		drm_err(drm, "Could not find buffer object to map\n");
52 
53 	return bo;
54 }
55 
vmw_mmap(struct file * filp,struct vm_area_struct * vma)56 int vmw_mmap(struct file *filp, struct vm_area_struct *vma)
57 {
58 	static const struct vm_operations_struct vmw_vm_ops = {
59 		.pfn_mkwrite = vmw_bo_vm_mkwrite,
60 		.page_mkwrite = vmw_bo_vm_mkwrite,
61 		.fault = vmw_bo_vm_fault,
62 		.open = ttm_bo_vm_open,
63 		.close = ttm_bo_vm_close,
64 	};
65 	struct drm_file *file_priv = filp->private_data;
66 	struct vmw_private *dev_priv = vmw_priv(file_priv->minor->dev);
67 	struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
68 	struct ttm_device *bdev = &dev_priv->bdev;
69 	struct ttm_buffer_object *bo;
70 	int ret;
71 
72 	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET_START))
73 		return -EINVAL;
74 
75 	bo = vmw_bo_vm_lookup(bdev, vma->vm_pgoff, vma_pages(vma));
76 	if (unlikely(!bo))
77 		return -EINVAL;
78 
79 	ret = vmw_user_bo_verify_access(bo, tfile);
80 	if (unlikely(ret != 0))
81 		goto out_unref;
82 
83 	ret = ttm_bo_mmap_obj(vma, bo);
84 	if (unlikely(ret != 0))
85 		goto out_unref;
86 
87 	vma->vm_ops = &vmw_vm_ops;
88 
89 	/* Use VM_PFNMAP rather than VM_MIXEDMAP if not a COW mapping */
90 	if (!is_cow_mapping(vma->vm_flags))
91 		vma->vm_flags = (vma->vm_flags & ~VM_MIXEDMAP) | VM_PFNMAP;
92 
93 	ttm_bo_put(bo); /* release extra ref taken by ttm_bo_mmap_obj() */
94 
95 	return 0;
96 
97 out_unref:
98 	ttm_bo_put(bo);
99 	return ret;
100 }
101 
102 /* struct vmw_validation_mem callback */
vmw_vmt_reserve(struct vmw_validation_mem * m,size_t size)103 static int vmw_vmt_reserve(struct vmw_validation_mem *m, size_t size)
104 {
105 	static struct ttm_operation_ctx ctx = {.interruptible = false,
106 					       .no_wait_gpu = false};
107 	struct vmw_private *dev_priv = container_of(m, struct vmw_private, vvm);
108 
109 	return ttm_mem_global_alloc(vmw_mem_glob(dev_priv), size, &ctx);
110 }
111 
112 /* struct vmw_validation_mem callback */
vmw_vmt_unreserve(struct vmw_validation_mem * m,size_t size)113 static void vmw_vmt_unreserve(struct vmw_validation_mem *m, size_t size)
114 {
115 	struct vmw_private *dev_priv = container_of(m, struct vmw_private, vvm);
116 
117 	return ttm_mem_global_free(vmw_mem_glob(dev_priv), size);
118 }
119 
120 /**
121  * vmw_validation_mem_init_ttm - Interface the validation memory tracker
122  * to ttm.
123  * @dev_priv: Pointer to struct vmw_private. The reason we choose a vmw private
124  * rather than a struct vmw_validation_mem is to make sure assumption in the
125  * callbacks that struct vmw_private derives from struct vmw_validation_mem
126  * holds true.
127  * @gran: The recommended allocation granularity
128  */
vmw_validation_mem_init_ttm(struct vmw_private * dev_priv,size_t gran)129 void vmw_validation_mem_init_ttm(struct vmw_private *dev_priv, size_t gran)
130 {
131 	struct vmw_validation_mem *vvm = &dev_priv->vvm;
132 
133 	vvm->reserve_mem = vmw_vmt_reserve;
134 	vvm->unreserve_mem = vmw_vmt_unreserve;
135 	vvm->gran = gran;
136 }
137