drivers/gpu/drm/r128/r128_ioc32.c

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