1 /* $NetBSD: r128_ioc32.c,v 1.3 2021/12/18 23:45:42 riastradh Exp $ */
2
3 /**
4 * \file r128_ioc32.c
5 *
6 * 32-bit ioctl compatibility routines for the R128 DRM.
7 *
8 * \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich
9 *
10 * Copyright (C) Paul Mackerras 2005
11 * Copyright (C) Egbert Eich 2003,2004
12 * Copyright (C) Dave Airlie 2005
13 * All Rights Reserved.
14 *
15 * Permission is hereby granted, free of charge, to any person obtaining a
16 * copy of this software and associated documentation files (the "Software"),
17 * to deal in the Software without restriction, including without limitation
18 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
19 * and/or sell copies of the Software, and to permit persons to whom the
20 * Software is furnished to do so, subject to the following conditions:
21 *
22 * The above copyright notice and this permission notice (including the next
23 * paragraph) shall be included in all copies or substantial portions of the
24 * Software.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
27 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
28 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
29 * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
30 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
31 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
32 * IN THE SOFTWARE.
33 */
34
35 #include <sys/cdefs.h>
36 __KERNEL_RCSID(0, "$NetBSD: r128_ioc32.c,v 1.3 2021/12/18 23:45:42 riastradh Exp $");
37
38 #include <linux/compat.h>
39
40 #include <drm/r128_drm.h>
41
42 #include "r128_drv.h"
43
44 typedef struct drm_r128_init32 {
45 int func;
46 unsigned int sarea_priv_offset;
47 int is_pci;
48 int cce_mode;
49 int cce_secure;
50 int ring_size;
51 int usec_timeout;
52
53 unsigned int fb_bpp;
54 unsigned int front_offset, front_pitch;
55 unsigned int back_offset, back_pitch;
56 unsigned int depth_bpp;
57 unsigned int depth_offset, depth_pitch;
58 unsigned int span_offset;
59
60 unsigned int fb_offset;
61 unsigned int mmio_offset;
62 unsigned int ring_offset;
63 unsigned int ring_rptr_offset;
64 unsigned int buffers_offset;
65 unsigned int agp_textures_offset;
66 } drm_r128_init32_t;
67
compat_r128_init(struct file * file,unsigned int cmd,unsigned long arg)68 static int compat_r128_init(struct file *file, unsigned int cmd,
69 unsigned long arg)
70 {
71 drm_r128_init32_t init32;
72 drm_r128_init_t init;
73
74 if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
75 return -EFAULT;
76
77 init.func = init32.func;
78 init.sarea_priv_offset = init32.sarea_priv_offset;
79 init.is_pci = init32.is_pci;
80 init.cce_mode = init32.cce_mode;
81 init.cce_secure = init32.cce_secure;
82 init.ring_size = init32.ring_size;
83 init.usec_timeout = init32.usec_timeout;
84 init.fb_bpp = init32.fb_bpp;
85 init.front_offset = init32.front_offset;
86 init.front_pitch = init32.front_pitch;
87 init.back_offset = init32.back_offset;
88 init.back_pitch = init32.back_pitch;
89 init.depth_bpp = init32.depth_bpp;
90 init.depth_offset = init32.depth_offset;
91 init.depth_pitch = init32.depth_pitch;
92 init.span_offset = init32.span_offset;
93 init.fb_offset = init32.fb_offset;
94 init.mmio_offset = init32.mmio_offset;
95 init.ring_offset = init32.ring_offset;
96 init.ring_rptr_offset = init32.ring_rptr_offset;
97 init.buffers_offset = init32.buffers_offset;
98 init.agp_textures_offset = init32.agp_textures_offset;
99
100 return drm_ioctl_kernel(file, r128_cce_init, &init,
101 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
102 }
103
104 typedef struct drm_r128_depth32 {
105 int func;
106 int n;
107 u32 x;
108 u32 y;
109 u32 buffer;
110 u32 mask;
111 } drm_r128_depth32_t;
112
compat_r128_depth(struct file * file,unsigned int cmd,unsigned long arg)113 static int compat_r128_depth(struct file *file, unsigned int cmd,
114 unsigned long arg)
115 {
116 drm_r128_depth32_t depth32;
117 drm_r128_depth_t depth;
118
119 if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32)))
120 return -EFAULT;
121
122 depth.func = depth32.func;
123 depth.n = depth32.n;
124 depth.x = compat_ptr(depth32.x);
125 depth.y = compat_ptr(depth32.y);
126 depth.buffer = compat_ptr(depth32.buffer);
127 depth.mask = compat_ptr(depth32.mask);
128
129 return drm_ioctl_kernel(file, r128_cce_depth, &depth, DRM_AUTH);
130 }
131
132 typedef struct drm_r128_stipple32 {
133 u32 mask;
134 } drm_r128_stipple32_t;
135
compat_r128_stipple(struct file * file,unsigned int cmd,unsigned long arg)136 static int compat_r128_stipple(struct file *file, unsigned int cmd,
137 unsigned long arg)
138 {
139 drm_r128_stipple32_t stipple32;
140 drm_r128_stipple_t stipple;
141
142 if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32)))
143 return -EFAULT;
144
145 stipple.mask = compat_ptr(stipple32.mask);
146
147 return drm_ioctl_kernel(file, r128_cce_stipple, &stipple, DRM_AUTH);
148 }
149
150 typedef struct drm_r128_getparam32 {
151 int param;
152 u32 value;
153 } drm_r128_getparam32_t;
154
compat_r128_getparam(struct file * file,unsigned int cmd,unsigned long arg)155 static int compat_r128_getparam(struct file *file, unsigned int cmd,
156 unsigned long arg)
157 {
158 drm_r128_getparam32_t getparam32;
159 drm_r128_getparam_t getparam;
160
161 if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
162 return -EFAULT;
163
164 getparam.param = getparam32.param;
165 getparam.value = compat_ptr(getparam32.value);
166
167 return drm_ioctl_kernel(file, r128_getparam, &getparam, DRM_AUTH);
168 }
169
170 drm_ioctl_compat_t *r128_compat_ioctls[] = {
171 [DRM_R128_INIT] = compat_r128_init,
172 [DRM_R128_DEPTH] = compat_r128_depth,
173 [DRM_R128_STIPPLE] = compat_r128_stipple,
174 [DRM_R128_GETPARAM] = compat_r128_getparam,
175 };
176
177 /**
178 * Called whenever a 32-bit process running under a 64-bit kernel
179 * performs an ioctl on /dev/dri/card<n>.
180 *
181 * \param filp file pointer.
182 * \param cmd command.
183 * \param arg user argument.
184 * \return zero on success or negative number on failure.
185 */
r128_compat_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)186 long r128_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
187 {
188 unsigned int nr = DRM_IOCTL_NR(cmd);
189 drm_ioctl_compat_t *fn = NULL;
190 int ret;
191
192 if (nr < DRM_COMMAND_BASE)
193 return drm_compat_ioctl(filp, cmd, arg);
194
195 if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(r128_compat_ioctls))
196 fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE];
197
198 if (fn != NULL)
199 ret = (*fn) (filp, cmd, arg);
200 else
201 ret = drm_ioctl(filp, cmd, arg);
202
203 return ret;
204 }
205