1 /* $NetBSD: vmwgfx_ttm_glue.c,v 1.3 2021/12/18 23:45:45 riastradh Exp $ */
2
3 // SPDX-License-Identifier: GPL-2.0 OR MIT
4 /**************************************************************************
5 *
6 * Copyright 2009-2011 VMware, Inc., Palo Alto, CA., USA
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the
10 * "Software"), to deal in the Software without restriction, including
11 * without limitation the rights to use, copy, modify, merge, publish,
12 * distribute, sub license, and/or sell copies of the Software, and to
13 * permit persons to whom the Software is furnished to do so, subject to
14 * the following conditions:
15 *
16 * The above copyright notice and this permission notice (including the
17 * next paragraph) shall be included in all copies or substantial portions
18 * of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
23 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
24 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
25 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
26 * USE OR OTHER DEALINGS IN THE SOFTWARE.
27 *
28 **************************************************************************/
29
30 #include <sys/cdefs.h>
31 __KERNEL_RCSID(0, "$NetBSD: vmwgfx_ttm_glue.c,v 1.3 2021/12/18 23:45:45 riastradh Exp $");
32
33 #include "vmwgfx_drv.h"
34
vmw_mmap(struct file * filp,struct vm_area_struct * vma)35 int vmw_mmap(struct file *filp, struct vm_area_struct *vma)
36 {
37 static const struct vm_operations_struct vmw_vm_ops = {
38 .pfn_mkwrite = vmw_bo_vm_mkwrite,
39 .page_mkwrite = vmw_bo_vm_mkwrite,
40 .fault = vmw_bo_vm_fault,
41 .open = ttm_bo_vm_open,
42 .close = ttm_bo_vm_close
43 };
44 struct drm_file *file_priv = filp->private_data;
45 struct vmw_private *dev_priv = vmw_priv(file_priv->minor->dev);
46 int ret = ttm_bo_mmap(filp, vma, &dev_priv->bdev);
47
48 if (ret)
49 return ret;
50
51 vma->vm_ops = &vmw_vm_ops;
52
53 /* Use VM_PFNMAP rather than VM_MIXEDMAP if not a COW mapping */
54 if ((vma->vm_flags & (VM_SHARED | VM_MAYWRITE)) != VM_MAYWRITE)
55 vma->vm_flags = (vma->vm_flags & ~VM_MIXEDMAP) | VM_PFNMAP;
56
57 return 0;
58 }
59
60 /* struct vmw_validation_mem callback */
vmw_vmt_reserve(struct vmw_validation_mem * m,size_t size)61 static int vmw_vmt_reserve(struct vmw_validation_mem *m, size_t size)
62 {
63 static struct ttm_operation_ctx ctx = {.interruptible = false,
64 .no_wait_gpu = false};
65 struct vmw_private *dev_priv = container_of(m, struct vmw_private, vvm);
66
67 return ttm_mem_global_alloc(vmw_mem_glob(dev_priv), size, &ctx);
68 }
69
70 /* struct vmw_validation_mem callback */
vmw_vmt_unreserve(struct vmw_validation_mem * m,size_t size)71 static void vmw_vmt_unreserve(struct vmw_validation_mem *m, size_t size)
72 {
73 struct vmw_private *dev_priv = container_of(m, struct vmw_private, vvm);
74
75 return ttm_mem_global_free(vmw_mem_glob(dev_priv), size);
76 }
77
78 /**
79 * vmw_validation_mem_init_ttm - Interface the validation memory tracker
80 * to ttm.
81 * @dev_priv: Pointer to struct vmw_private. The reason we choose a vmw private
82 * rather than a struct vmw_validation_mem is to make sure assumption in the
83 * callbacks that struct vmw_private derives from struct vmw_validation_mem
84 * holds true.
85 * @gran: The recommended allocation granularity
86 */
vmw_validation_mem_init_ttm(struct vmw_private * dev_priv,size_t gran)87 void vmw_validation_mem_init_ttm(struct vmw_private *dev_priv, size_t gran)
88 {
89 struct vmw_validation_mem *vvm = &dev_priv->vvm;
90
91 vvm->reserve_mem = vmw_vmt_reserve;
92 vvm->unreserve_mem = vmw_vmt_unreserve;
93 vvm->gran = gran;
94 }
95