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
34 #include <linux/compat.h>
35
36 #include "mga_drv.h"
37
38 typedef struct drm32_mga_init {
39 int func;
40 u32 sarea_priv_offset;
41 int chipset;
42 int sgram;
43 unsigned int maccess;
44 unsigned int fb_cpp;
45 unsigned int front_offset, front_pitch;
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];
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
compat_mga_init(struct file * file,unsigned int cmd,unsigned long arg)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 init;
64
65 if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
66 return -EFAULT;
67
68 init.func = init32.func;
69 init.sarea_priv_offset = init32.sarea_priv_offset;
70 memcpy(&init.chipset, &init32.chipset,
71 offsetof(drm_mga_init_t, fb_offset) -
72 offsetof(drm_mga_init_t, chipset));
73 init.fb_offset = init32.fb_offset;
74 init.mmio_offset = init32.mmio_offset;
75 init.status_offset = init32.status_offset;
76 init.warp_offset = init32.warp_offset;
77 init.primary_offset = init32.primary_offset;
78 init.buffers_offset = init32.buffers_offset;
79
80 return drm_ioctl_kernel(file, mga_dma_init, &init,
81 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
82 }
83
84 typedef struct drm_mga_getparam32 {
85 int param;
86 u32 value;
87 } drm_mga_getparam32_t;
88
compat_mga_getparam(struct file * file,unsigned int cmd,unsigned long arg)89 static int compat_mga_getparam(struct file *file, unsigned int cmd,
90 unsigned long arg)
91 {
92 drm_mga_getparam32_t getparam32;
93 drm_mga_getparam_t getparam;
94
95 if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
96 return -EFAULT;
97
98 getparam.param = getparam32.param;
99 getparam.value = compat_ptr(getparam32.value);
100 return drm_ioctl_kernel(file, mga_getparam, &getparam, DRM_AUTH);
101 }
102
103 typedef struct drm_mga_drm_bootstrap32 {
104 u32 texture_handle;
105 u32 texture_size;
106 u32 primary_size;
107 u32 secondary_bin_count;
108 u32 secondary_bin_size;
109 u32 agp_mode;
110 u8 agp_size;
111 } drm_mga_dma_bootstrap32_t;
112
compat_mga_dma_bootstrap(struct file * file,unsigned int cmd,unsigned long arg)113 static int compat_mga_dma_bootstrap(struct file *file, unsigned int cmd,
114 unsigned long arg)
115 {
116 drm_mga_dma_bootstrap32_t dma_bootstrap32;
117 drm_mga_dma_bootstrap_t dma_bootstrap;
118 int err;
119
120 if (copy_from_user(&dma_bootstrap32, (void __user *)arg,
121 sizeof(dma_bootstrap32)))
122 return -EFAULT;
123
124 dma_bootstrap.texture_handle = dma_bootstrap32.texture_handle;
125 dma_bootstrap.texture_size = dma_bootstrap32.texture_size;
126 dma_bootstrap.primary_size = dma_bootstrap32.primary_size;
127 dma_bootstrap.secondary_bin_count = dma_bootstrap32.secondary_bin_count;
128 dma_bootstrap.secondary_bin_size = dma_bootstrap32.secondary_bin_size;
129 dma_bootstrap.agp_mode = dma_bootstrap32.agp_mode;
130 dma_bootstrap.agp_size = dma_bootstrap32.agp_size;
131
132 err = drm_ioctl_kernel(file, mga_dma_bootstrap, &dma_bootstrap,
133 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
134 if (err)
135 return err;
136
137 dma_bootstrap32.texture_handle = dma_bootstrap.texture_handle;
138 dma_bootstrap32.texture_size = dma_bootstrap.texture_size;
139 dma_bootstrap32.primary_size = dma_bootstrap.primary_size;
140 dma_bootstrap32.secondary_bin_count = dma_bootstrap.secondary_bin_count;
141 dma_bootstrap32.secondary_bin_size = dma_bootstrap.secondary_bin_size;
142 dma_bootstrap32.agp_mode = dma_bootstrap.agp_mode;
143 dma_bootstrap32.agp_size = dma_bootstrap.agp_size;
144 if (copy_to_user((void __user *)arg, &dma_bootstrap32,
145 sizeof(dma_bootstrap32)))
146 return -EFAULT;
147
148 return 0;
149 }
150
151 static struct {
152 drm_ioctl_compat_t *fn;
153 char *name;
154 } mga_compat_ioctls[] = {
155 #define DRM_IOCTL32_DEF(n, f)[DRM_##n] = {.fn = f, .name = #n}
156 DRM_IOCTL32_DEF(MGA_INIT, compat_mga_init),
157 DRM_IOCTL32_DEF(MGA_GETPARAM, compat_mga_getparam),
158 DRM_IOCTL32_DEF(MGA_DMA_BOOTSTRAP, compat_mga_dma_bootstrap),
159 };
160
161 /**
162 * Called whenever a 32-bit process running under a 64-bit kernel
163 * performs an ioctl on /dev/dri/card<n>.
164 *
165 * \param filp file pointer.
166 * \param cmd command.
167 * \param arg user argument.
168 * \return zero on success or negative number on failure.
169 */
mga_compat_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)170 long mga_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
171 {
172 unsigned int nr = DRM_IOCTL_NR(cmd);
173 struct drm_file *file_priv = filp->private_data;
174 drm_ioctl_compat_t *fn = NULL;
175 int ret;
176
177 if (nr < DRM_COMMAND_BASE)
178 return drm_compat_ioctl(filp, cmd, arg);
179
180 if (nr >= DRM_COMMAND_BASE + ARRAY_SIZE(mga_compat_ioctls))
181 return drm_ioctl(filp, cmd, arg);
182
183 fn = mga_compat_ioctls[nr - DRM_COMMAND_BASE].fn;
184 if (!fn)
185 return drm_ioctl(filp, cmd, arg);
186
187 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
188 task_pid_nr(current),
189 (long)old_encode_dev(file_priv->minor->kdev->devt),
190 file_priv->authenticated,
191 mga_compat_ioctls[nr - DRM_COMMAND_BASE].name);
192 ret = (*fn) (filp, cmd, arg);
193 if (ret)
194 DRM_DEBUG("ret = %d\n", ret);
195 return ret;
196 }
197
