4 * 32-bit ioctl compatibility routines for the MGA DRM.
6 * \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich
9 * Copyright (C) Paul Mackerras 2005
10 * Copyright (C) Egbert Eich 2003,2004
11 * Copyright (C) Dave Airlie 2005
12 * All Rights Reserved.
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:
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
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
33 #include <linux/compat.h>
34 #include <linux/ioctl32.h>
40 typedef struct drm32_mga_init {
42 u32 sarea_priv_offset;
47 unsigned int front_offset, front_pitch;
48 unsigned int back_offset, back_pitch;
49 unsigned int depth_cpp;
50 unsigned int depth_offset, depth_pitch;
51 unsigned int texture_offset[MGA_NR_TEX_HEAPS];
52 unsigned int texture_size[MGA_NR_TEX_HEAPS];
61 static int compat_mga_init(struct file *file, unsigned int cmd,
64 drm_mga_init32_t init32;
65 drm_mga_init_t __user *init;
68 if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
71 init = compat_alloc_user_space(sizeof(*init));
72 if (!access_ok(VERIFY_WRITE, init, sizeof(*init))
73 || __put_user(init32.func, &init->func)
74 || __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset)
75 || __put_user(init32.chipset, &init->chipset)
76 || __put_user(init32.sgram, &init->sgram)
77 || __put_user(init32.maccess, &init->maccess)
78 || __put_user(init32.fb_cpp, &init->fb_cpp)
79 || __put_user(init32.front_offset, &init->front_offset)
80 || __put_user(init32.front_pitch, &init->front_pitch)
81 || __put_user(init32.back_offset, &init->back_offset)
82 || __put_user(init32.back_pitch, &init->back_pitch)
83 || __put_user(init32.depth_cpp, &init->depth_cpp)
84 || __put_user(init32.depth_offset, &init->depth_offset)
85 || __put_user(init32.depth_pitch, &init->depth_pitch)
86 || __put_user(init32.fb_offset, &init->fb_offset)
87 || __put_user(init32.mmio_offset, &init->mmio_offset)
88 || __put_user(init32.status_offset, &init->status_offset)
89 || __put_user(init32.warp_offset, &init->warp_offset)
90 || __put_user(init32.primary_offset, &init->primary_offset)
91 || __put_user(init32.buffers_offset, &init->buffers_offset))
94 for (i=0; i<MGA_NR_TEX_HEAPS; i++)
96 err |= __put_user(init32.texture_offset[i], &init->texture_offset[i]);
97 err |= __put_user(init32.texture_size[i], &init->texture_size[i]);
102 return drm_ioctl(file->f_dentry->d_inode, file,
103 DRM_IOCTL_MGA_INIT, (unsigned long) init);
107 typedef struct drm_mga_getparam32 {
110 } drm_mga_getparam32_t;
113 static int compat_mga_getparam(struct file *file, unsigned int cmd,
116 drm_mga_getparam32_t getparam32;
117 drm_mga_getparam_t __user *getparam;
119 if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
122 getparam = compat_alloc_user_space(sizeof(*getparam));
123 if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam))
124 || __put_user(getparam32.param, &getparam->param)
125 || __put_user((void __user *)(unsigned long)getparam32.value, &getparam->value))
128 return drm_ioctl(file->f_dentry->d_inode, file,
129 DRM_IOCTL_MGA_GETPARAM, (unsigned long)getparam);
132 drm_ioctl_compat_t *mga_compat_ioctls[] = {
133 [DRM_MGA_INIT] = compat_mga_init,
134 [DRM_MGA_GETPARAM] = compat_mga_getparam,
138 * Called whenever a 32-bit process running under a 64-bit kernel
139 * performs an ioctl on /dev/dri/card<n>.
141 * \param filp file pointer.
142 * \param cmd command.
143 * \param arg user argument.
144 * \return zero on success or negative number on failure.
146 long mga_compat_ioctl(struct file *filp, unsigned int cmd,
149 unsigned int nr = DRM_IOCTL_NR(cmd);
150 drm_ioctl_compat_t *fn = NULL;
153 if (nr < DRM_COMMAND_BASE)
154 return drm_compat_ioctl(filp, cmd, arg);
156 if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(mga_compat_ioctls))
157 fn = mga_compat_ioctls[nr - DRM_COMMAND_BASE];
159 lock_kernel(); /* XXX for now */
161 ret = (*fn)(filp, cmd, arg);
163 ret = drm_ioctl(filp->f_dentry->d_inode, filp, cmd, arg);