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8ca7c1df DA |
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> | |
8ca7c1df | 34 | |
760285e7 DH |
35 | #include <drm/drmP.h> |
36 | #include <drm/mga_drm.h> | |
8ca7c1df DA |
37 | |
38 | typedef struct drm32_mga_init { | |
39 | int func; | |
b5e89ed5 | 40 | u32 sarea_priv_offset; |
8ca7c1df | 41 | int chipset; |
b5e89ed5 | 42 | int sgram; |
8ca7c1df | 43 | unsigned int maccess; |
b5e89ed5 | 44 | unsigned int fb_cpp; |
8ca7c1df | 45 | unsigned int front_offset, front_pitch; |
b5e89ed5 DA |
46 | unsigned int back_offset, back_pitch; |
47 | unsigned int depth_cpp; | |
48 | unsigned int depth_offset, depth_pitch; | |
49 | unsigned int texture_offset[MGA_NR_TEX_HEAPS]; | |
50 | unsigned int texture_size[MGA_NR_TEX_HEAPS]; | |
8ca7c1df DA |
51 | u32 fb_offset; |
52 | u32 mmio_offset; | |
53 | u32 status_offset; | |
54 | u32 warp_offset; | |
55 | u32 primary_offset; | |
56 | u32 buffers_offset; | |
57 | } drm_mga_init32_t; | |
58 | ||
59 | static int compat_mga_init(struct file *file, unsigned int cmd, | |
60 | unsigned long arg) | |
61 | { | |
62 | drm_mga_init32_t init32; | |
63 | drm_mga_init_t __user *init; | |
64 | int err = 0, i; | |
b5e89ed5 | 65 | |
8ca7c1df DA |
66 | if (copy_from_user(&init32, (void __user *)arg, sizeof(init32))) |
67 | return -EFAULT; | |
b5e89ed5 | 68 | |
8ca7c1df DA |
69 | init = compat_alloc_user_space(sizeof(*init)); |
70 | if (!access_ok(VERIFY_WRITE, init, sizeof(*init)) | |
71 | || __put_user(init32.func, &init->func) | |
72 | || __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset) | |
73 | || __put_user(init32.chipset, &init->chipset) | |
74 | || __put_user(init32.sgram, &init->sgram) | |
75 | || __put_user(init32.maccess, &init->maccess) | |
76 | || __put_user(init32.fb_cpp, &init->fb_cpp) | |
77 | || __put_user(init32.front_offset, &init->front_offset) | |
78 | || __put_user(init32.front_pitch, &init->front_pitch) | |
79 | || __put_user(init32.back_offset, &init->back_offset) | |
80 | || __put_user(init32.back_pitch, &init->back_pitch) | |
81 | || __put_user(init32.depth_cpp, &init->depth_cpp) | |
82 | || __put_user(init32.depth_offset, &init->depth_offset) | |
83 | || __put_user(init32.depth_pitch, &init->depth_pitch) | |
84 | || __put_user(init32.fb_offset, &init->fb_offset) | |
85 | || __put_user(init32.mmio_offset, &init->mmio_offset) | |
86 | || __put_user(init32.status_offset, &init->status_offset) | |
87 | || __put_user(init32.warp_offset, &init->warp_offset) | |
88 | || __put_user(init32.primary_offset, &init->primary_offset) | |
89 | || __put_user(init32.buffers_offset, &init->buffers_offset)) | |
90 | return -EFAULT; | |
b5e89ed5 DA |
91 | |
92 | for (i = 0; i < MGA_NR_TEX_HEAPS; i++) { | |
93 | err |= | |
94 | __put_user(init32.texture_offset[i], | |
95 | &init->texture_offset[i]); | |
96 | err |= | |
97 | __put_user(init32.texture_size[i], &init->texture_size[i]); | |
8ca7c1df DA |
98 | } |
99 | if (err) | |
100 | return -EFAULT; | |
b5e89ed5 | 101 | |
ed8b6704 | 102 | return drm_ioctl(file, DRM_IOCTL_MGA_INIT, (unsigned long)init); |
8ca7c1df DA |
103 | } |
104 | ||
8ca7c1df DA |
105 | typedef struct drm_mga_getparam32 { |
106 | int param; | |
107 | u32 value; | |
108 | } drm_mga_getparam32_t; | |
109 | ||
8ca7c1df DA |
110 | static int compat_mga_getparam(struct file *file, unsigned int cmd, |
111 | unsigned long arg) | |
112 | { | |
113 | drm_mga_getparam32_t getparam32; | |
114 | drm_mga_getparam_t __user *getparam; | |
b5e89ed5 | 115 | |
8ca7c1df DA |
116 | if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32))) |
117 | return -EFAULT; | |
118 | ||
119 | getparam = compat_alloc_user_space(sizeof(*getparam)); | |
120 | if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam)) | |
121 | || __put_user(getparam32.param, &getparam->param) | |
b5e89ed5 DA |
122 | || __put_user((void __user *)(unsigned long)getparam32.value, |
123 | &getparam->value)) | |
8ca7c1df DA |
124 | return -EFAULT; |
125 | ||
ed8b6704 | 126 | return drm_ioctl(file, DRM_IOCTL_MGA_GETPARAM, (unsigned long)getparam); |
8ca7c1df DA |
127 | } |
128 | ||
d1f2b55a DA |
129 | typedef struct drm_mga_drm_bootstrap32 { |
130 | u32 texture_handle; | |
131 | u32 texture_size; | |
132 | u32 primary_size; | |
133 | u32 secondary_bin_count; | |
134 | u32 secondary_bin_size; | |
135 | u32 agp_mode; | |
136 | u8 agp_size; | |
137 | } drm_mga_dma_bootstrap32_t; | |
138 | ||
139 | static int compat_mga_dma_bootstrap(struct file *file, unsigned int cmd, | |
140 | unsigned long arg) | |
141 | { | |
142 | drm_mga_dma_bootstrap32_t dma_bootstrap32; | |
143 | drm_mga_dma_bootstrap_t __user *dma_bootstrap; | |
144 | int err; | |
145 | ||
146 | if (copy_from_user(&dma_bootstrap32, (void __user *)arg, | |
147 | sizeof(dma_bootstrap32))) | |
148 | return -EFAULT; | |
149 | ||
150 | dma_bootstrap = compat_alloc_user_space(sizeof(*dma_bootstrap)); | |
151 | if (!access_ok(VERIFY_WRITE, dma_bootstrap, sizeof(*dma_bootstrap)) | |
152 | || __put_user(dma_bootstrap32.texture_handle, | |
153 | &dma_bootstrap->texture_handle) | |
154 | || __put_user(dma_bootstrap32.texture_size, | |
155 | &dma_bootstrap->texture_size) | |
156 | || __put_user(dma_bootstrap32.primary_size, | |
157 | &dma_bootstrap->primary_size) | |
158 | || __put_user(dma_bootstrap32.secondary_bin_count, | |
159 | &dma_bootstrap->secondary_bin_count) | |
160 | || __put_user(dma_bootstrap32.secondary_bin_size, | |
161 | &dma_bootstrap->secondary_bin_size) | |
162 | || __put_user(dma_bootstrap32.agp_mode, &dma_bootstrap->agp_mode) | |
163 | || __put_user(dma_bootstrap32.agp_size, &dma_bootstrap->agp_size)) | |
164 | return -EFAULT; | |
165 | ||
ed8b6704 | 166 | err = drm_ioctl(file, DRM_IOCTL_MGA_DMA_BOOTSTRAP, |
d1f2b55a DA |
167 | (unsigned long)dma_bootstrap); |
168 | if (err) | |
169 | return err; | |
170 | ||
171 | if (__get_user(dma_bootstrap32.texture_handle, | |
172 | &dma_bootstrap->texture_handle) | |
173 | || __get_user(dma_bootstrap32.texture_size, | |
174 | &dma_bootstrap->texture_size) | |
175 | || __get_user(dma_bootstrap32.primary_size, | |
176 | &dma_bootstrap->primary_size) | |
177 | || __get_user(dma_bootstrap32.secondary_bin_count, | |
178 | &dma_bootstrap->secondary_bin_count) | |
179 | || __get_user(dma_bootstrap32.secondary_bin_size, | |
180 | &dma_bootstrap->secondary_bin_size) | |
b5e89ed5 DA |
181 | || __get_user(dma_bootstrap32.agp_mode, &dma_bootstrap->agp_mode) |
182 | || __get_user(dma_bootstrap32.agp_size, &dma_bootstrap->agp_size)) | |
d1f2b55a DA |
183 | return -EFAULT; |
184 | ||
185 | if (copy_to_user((void __user *)arg, &dma_bootstrap32, | |
b5e89ed5 | 186 | sizeof(dma_bootstrap32))) |
d1f2b55a DA |
187 | return -EFAULT; |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
8ca7c1df DA |
192 | drm_ioctl_compat_t *mga_compat_ioctls[] = { |
193 | [DRM_MGA_INIT] = compat_mga_init, | |
194 | [DRM_MGA_GETPARAM] = compat_mga_getparam, | |
d1f2b55a | 195 | [DRM_MGA_DMA_BOOTSTRAP] = compat_mga_dma_bootstrap, |
8ca7c1df DA |
196 | }; |
197 | ||
198 | /** | |
199 | * Called whenever a 32-bit process running under a 64-bit kernel | |
200 | * performs an ioctl on /dev/dri/card<n>. | |
201 | * | |
202 | * \param filp file pointer. | |
203 | * \param cmd command. | |
204 | * \param arg user argument. | |
205 | * \return zero on success or negative number on failure. | |
206 | */ | |
b5e89ed5 | 207 | long mga_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
8ca7c1df DA |
208 | { |
209 | unsigned int nr = DRM_IOCTL_NR(cmd); | |
210 | drm_ioctl_compat_t *fn = NULL; | |
211 | int ret; | |
212 | ||
213 | if (nr < DRM_COMMAND_BASE) | |
214 | return drm_compat_ioctl(filp, cmd, arg); | |
b5e89ed5 | 215 | |
8ca7c1df DA |
216 | if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(mga_compat_ioctls)) |
217 | fn = mga_compat_ioctls[nr - DRM_COMMAND_BASE]; | |
218 | ||
8ca7c1df | 219 | if (fn != NULL) |
b5e89ed5 | 220 | ret = (*fn) (filp, cmd, arg); |
8ca7c1df | 221 | else |
ed8b6704 | 222 | ret = drm_ioctl(filp, cmd, arg); |
8ca7c1df DA |
223 | |
224 | return ret; | |
225 | } |