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 <drm/drmP.h>
29 #include "vmwgfx_drv.h"
30 
31 int vmw_mmap(struct file *filp, struct vm_area_struct *vma)
32 {
33 	struct drm_file *file_priv;
34 	struct vmw_private *dev_priv;
35 
36 	if (unlikely(vma->vm_pgoff < VMWGFX_FILE_PAGE_OFFSET)) {
37 		DRM_ERROR("Illegal attempt to mmap old fifo space.\n");
38 		return -EINVAL;
39 	}
40 
41 	file_priv = filp->private_data;
42 	dev_priv = vmw_priv(file_priv->minor->dev);
43 	return ttm_bo_mmap(filp, vma, &dev_priv->bdev);
44 }
45 
46 static int vmw_ttm_mem_global_init(struct drm_global_reference *ref)
47 {
48 	DRM_INFO("global init.\n");
49 	return ttm_mem_global_init(ref->object);
50 }
51 
52 static void vmw_ttm_mem_global_release(struct drm_global_reference *ref)
53 {
54 	ttm_mem_global_release(ref->object);
55 }
56 
57 int vmw_ttm_global_init(struct vmw_private *dev_priv)
58 {
59 	struct drm_global_reference *global_ref;
60 	int ret;
61 
62 	global_ref = &dev_priv->mem_global_ref;
63 	global_ref->global_type = DRM_GLOBAL_TTM_MEM;
64 	global_ref->size = sizeof(struct ttm_mem_global);
65 	global_ref->init = &vmw_ttm_mem_global_init;
66 	global_ref->release = &vmw_ttm_mem_global_release;
67 
68 	ret = drm_global_item_ref(global_ref);
69 	if (unlikely(ret != 0)) {
70 		DRM_ERROR("Failed setting up TTM memory accounting.\n");
71 		return ret;
72 	}
73 
74 	dev_priv->bo_global_ref.mem_glob =
75 		dev_priv->mem_global_ref.object;
76 	global_ref = &dev_priv->bo_global_ref.ref;
77 	global_ref->global_type = DRM_GLOBAL_TTM_BO;
78 	global_ref->size = sizeof(struct ttm_bo_global);
79 	global_ref->init = &ttm_bo_global_init;
80 	global_ref->release = &ttm_bo_global_release;
81 	ret = drm_global_item_ref(global_ref);
82 
83 	if (unlikely(ret != 0)) {
84 		DRM_ERROR("Failed setting up TTM buffer objects.\n");
85 		goto out_no_bo;
86 	}
87 
88 	return 0;
89 out_no_bo:
90 	drm_global_item_unref(&dev_priv->mem_global_ref);
91 	return ret;
92 }
93 
94 void vmw_ttm_global_release(struct vmw_private *dev_priv)
95 {
96 	drm_global_item_unref(&dev_priv->bo_global_ref.ref);
97 	drm_global_item_unref(&dev_priv->mem_global_ref);
98 }
99