1 /**
2 * \file mga_ioc32.c
3 *
4 * 32-bit ioctl compatibility routines for the MGA DRM.
5 *
6 * \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich
7 *
8 *
9 * Copyright (C) Paul Mackerras 2005
10 * Copyright (C) Egbert Eich 2003,2004
11 * Copyright (C) Dave Airlie 2005
12 * All Rights Reserved.
13 *
14 * Permission is hereby granted, free of charge, to any person obtaining a
15 * copy of this software and associated documentation files (the "Software"),
16 * to deal in the Software without restriction, including without limitation
17 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
18 * and/or sell copies of the Software, and to permit persons to whom the
19 * Software is furnished to do so, subject to the following conditions:
20 *
21 * The above copyright notice and this permission notice (including the next
22 * paragraph) shall be included in all copies or substantial portions of the
23 * Software.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
26 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
27 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
28 * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
29 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
30 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
31 * IN THE SOFTWARE.
32 */
33 #include <linux/compat.h>
34
35 #include <drm/drmP.h>
36 #include <drm/mga_drm.h>
37 #include "mga_drv.h"
38
39 typedef struct drm32_mga_init {
40 int func;
41 u32 sarea_priv_offset;
42 int chipset;
43 int sgram;
44 unsigned int maccess;
45 unsigned int fb_cpp;
46 unsigned int front_offset, front_pitch;
47 unsigned int back_offset, back_pitch;
48 unsigned int depth_cpp;
49 unsigned int depth_offset, depth_pitch;
50 unsigned int texture_offset[MGA_NR_TEX_HEAPS];
51 unsigned int texture_size[MGA_NR_TEX_HEAPS];
52 u32 fb_offset;
53 u32 mmio_offset;
54 u32 status_offset;
55 u32 warp_offset;
56 u32 primary_offset;
57 u32 buffers_offset;
58 } drm_mga_init32_t;
59
compat_mga_init(struct file * file,unsigned int cmd,unsigned long arg)60 static int compat_mga_init(struct file *file, unsigned int cmd,
61 unsigned long arg)
62 {
63 drm_mga_init32_t init32;
64 drm_mga_init_t __user *init;
65 int err = 0, i;
66
67 if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
68 return -EFAULT;
69
70 init = compat_alloc_user_space(sizeof(*init));
71 if (!access_ok(VERIFY_WRITE, init, sizeof(*init))
72 || __put_user(init32.func, &init->func)
73 || __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset)
74 || __put_user(init32.chipset, &init->chipset)
75 || __put_user(init32.sgram, &init->sgram)
76 || __put_user(init32.maccess, &init->maccess)
77 || __put_user(init32.fb_cpp, &init->fb_cpp)
78 || __put_user(init32.front_offset, &init->front_offset)
79 || __put_user(init32.front_pitch, &init->front_pitch)
80 || __put_user(init32.back_offset, &init->back_offset)
81 || __put_user(init32.back_pitch, &init->back_pitch)
82 || __put_user(init32.depth_cpp, &init->depth_cpp)
83 || __put_user(init32.depth_offset, &init->depth_offset)
84 || __put_user(init32.depth_pitch, &init->depth_pitch)
85 || __put_user(init32.fb_offset, &init->fb_offset)
86 || __put_user(init32.mmio_offset, &init->mmio_offset)
87 || __put_user(init32.status_offset, &init->status_offset)
88 || __put_user(init32.warp_offset, &init->warp_offset)
89 || __put_user(init32.primary_offset, &init->primary_offset)
90 || __put_user(init32.buffers_offset, &init->buffers_offset))
91 return -EFAULT;
92
93 for (i = 0; i < MGA_NR_TEX_HEAPS; i++) {
94 err |=
95 __put_user(init32.texture_offset[i],
96 &init->texture_offset[i]);
97 err |=
98 __put_user(init32.texture_size[i], &init->texture_size[i]);
99 }
100 if (err)
101 return -EFAULT;
102
103 return drm_ioctl(file, DRM_IOCTL_MGA_INIT, (unsigned long)init);
104 }
105
106 typedef struct drm_mga_getparam32 {
107 int param;
108 u32 value;
109 } drm_mga_getparam32_t;
110
compat_mga_getparam(struct file * file,unsigned int cmd,unsigned long arg)111 static int compat_mga_getparam(struct file *file, unsigned int cmd,
112 unsigned long arg)
113 {
114 drm_mga_getparam32_t getparam32;
115 drm_mga_getparam_t __user *getparam;
116
117 if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
118 return -EFAULT;
119
120 getparam = compat_alloc_user_space(sizeof(*getparam));
121 if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam))
122 || __put_user(getparam32.param, &getparam->param)
123 || __put_user((void __user *)(unsigned long)getparam32.value,
124 &getparam->value))
125 return -EFAULT;
126
127 return drm_ioctl(file, DRM_IOCTL_MGA_GETPARAM, (unsigned long)getparam);
128 }
129
130 typedef struct drm_mga_drm_bootstrap32 {
131 u32 texture_handle;
132 u32 texture_size;
133 u32 primary_size;
134 u32 secondary_bin_count;
135 u32 secondary_bin_size;
136 u32 agp_mode;
137 u8 agp_size;
138 } drm_mga_dma_bootstrap32_t;
139
compat_mga_dma_bootstrap(struct file * file,unsigned int cmd,unsigned long arg)140 static int compat_mga_dma_bootstrap(struct file *file, unsigned int cmd,
141 unsigned long arg)
142 {
143 drm_mga_dma_bootstrap32_t dma_bootstrap32;
144 drm_mga_dma_bootstrap_t __user *dma_bootstrap;
145 int err;
146
147 if (copy_from_user(&dma_bootstrap32, (void __user *)arg,
148 sizeof(dma_bootstrap32)))
149 return -EFAULT;
150
151 dma_bootstrap = compat_alloc_user_space(sizeof(*dma_bootstrap));
152 if (!access_ok(VERIFY_WRITE, dma_bootstrap, sizeof(*dma_bootstrap))
153 || __put_user(dma_bootstrap32.texture_handle,
154 &dma_bootstrap->texture_handle)
155 || __put_user(dma_bootstrap32.texture_size,
156 &dma_bootstrap->texture_size)
157 || __put_user(dma_bootstrap32.primary_size,
158 &dma_bootstrap->primary_size)
159 || __put_user(dma_bootstrap32.secondary_bin_count,
160 &dma_bootstrap->secondary_bin_count)
161 || __put_user(dma_bootstrap32.secondary_bin_size,
162 &dma_bootstrap->secondary_bin_size)
163 || __put_user(dma_bootstrap32.agp_mode, &dma_bootstrap->agp_mode)
164 || __put_user(dma_bootstrap32.agp_size, &dma_bootstrap->agp_size))
165 return -EFAULT;
166
167 err = drm_ioctl(file, DRM_IOCTL_MGA_DMA_BOOTSTRAP,
168 (unsigned long)dma_bootstrap);
169 if (err)
170 return err;
171
172 if (__get_user(dma_bootstrap32.texture_handle,
173 &dma_bootstrap->texture_handle)
174 || __get_user(dma_bootstrap32.texture_size,
175 &dma_bootstrap->texture_size)
176 || __get_user(dma_bootstrap32.primary_size,
177 &dma_bootstrap->primary_size)
178 || __get_user(dma_bootstrap32.secondary_bin_count,
179 &dma_bootstrap->secondary_bin_count)
180 || __get_user(dma_bootstrap32.secondary_bin_size,
181 &dma_bootstrap->secondary_bin_size)
182 || __get_user(dma_bootstrap32.agp_mode, &dma_bootstrap->agp_mode)
183 || __get_user(dma_bootstrap32.agp_size, &dma_bootstrap->agp_size))
184 return -EFAULT;
185
186 if (copy_to_user((void __user *)arg, &dma_bootstrap32,
187 sizeof(dma_bootstrap32)))
188 return -EFAULT;
189
190 return 0;
191 }
192
193 drm_ioctl_compat_t *mga_compat_ioctls[] = {
194 [DRM_MGA_INIT] = compat_mga_init,
195 [DRM_MGA_GETPARAM] = compat_mga_getparam,
196 [DRM_MGA_DMA_BOOTSTRAP] = compat_mga_dma_bootstrap,
197 };
198
199 /**
200 * Called whenever a 32-bit process running under a 64-bit kernel
201 * performs an ioctl on /dev/dri/card<n>.
202 *
203 * \param filp file pointer.
204 * \param cmd command.
205 * \param arg user argument.
206 * \return zero on success or negative number on failure.
207 */
mga_compat_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)208 long mga_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
209 {
210 unsigned int nr = DRM_IOCTL_NR(cmd);
211 drm_ioctl_compat_t *fn = NULL;
212 int ret;
213
214 if (nr < DRM_COMMAND_BASE)
215 return drm_compat_ioctl(filp, cmd, arg);
216
217 if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(mga_compat_ioctls))
218 fn = mga_compat_ioctls[nr - DRM_COMMAND_BASE];
219
220 if (fn != NULL)
221 ret = (*fn) (filp, cmd, arg);
222 else
223 ret = drm_ioctl(filp, cmd, arg);
224
225 return ret;
226 }
227