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 #include <linux/compat.h>
  33
  34 #include <drm/drmP.h>
  35 #include <drm/r128_drm.h>
  36
  37 typedef struct drm_r128_init32 {
  38         int func;
  39         unsigned int sarea_priv_offset;
  40         int is_pci;
  41         int cce_mode;
  42         int cce_secure;
  43         int ring_size;
  44         int usec_timeout;
  45
  46         unsigned int fb_bpp;
  47         unsigned int front_offset, front_pitch;
  48         unsigned int back_offset, back_pitch;
  49         unsigned int depth_bpp;
  50         unsigned int depth_offset, depth_pitch;
  51         unsigned int span_offset;
  52
  53         unsigned int fb_offset;
  54         unsigned int mmio_offset;
  55         unsigned int ring_offset;
  56         unsigned int ring_rptr_offset;
  57         unsigned int buffers_offset;
  58         unsigned int agp_textures_offset;
  59 } drm_r128_init32_t;
  60
  61 static int compat_r128_init(struct file *file, unsigned int cmd,
  62                             unsigned long arg)
  63 {
  64         drm_r128_init32_t init32;
  65         drm_r128_init_t __user *init;
  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.is_pci, &init->is_pci)
  75             || __put_user(init32.cce_mode, &init->cce_mode)
  76             || __put_user(init32.cce_secure, &init->cce_secure)
  77             || __put_user(init32.ring_size, &init->ring_size)
  78             || __put_user(init32.usec_timeout, &init->usec_timeout)
  79             || __put_user(init32.fb_bpp, &init->fb_bpp)
  80             || __put_user(init32.front_offset, &init->front_offset)
  81             || __put_user(init32.front_pitch, &init->front_pitch)
  82             || __put_user(init32.back_offset, &init->back_offset)
  83             || __put_user(init32.back_pitch, &init->back_pitch)
  84             || __put_user(init32.depth_bpp, &init->depth_bpp)
  85             || __put_user(init32.depth_offset, &init->depth_offset)
  86             || __put_user(init32.depth_pitch, &init->depth_pitch)
  87             || __put_user(init32.span_offset, &init->span_offset)
  88             || __put_user(init32.fb_offset, &init->fb_offset)
  89             || __put_user(init32.mmio_offset, &init->mmio_offset)
  90             || __put_user(init32.ring_offset, &init->ring_offset)
  91             || __put_user(init32.ring_rptr_offset, &init->ring_rptr_offset)
  92             || __put_user(init32.buffers_offset, &init->buffers_offset)
  93             || __put_user(init32.agp_textures_offset,
  94                           &init->agp_textures_offset))
  95                 return -EFAULT;
  96
  97         return drm_ioctl(file, DRM_IOCTL_R128_INIT, (unsigned long)init);
  98 }
  99
 100 typedef struct drm_r128_depth32 {
 101         int func;
 102         int n;
 103         u32 x;
 104         u32 y;
 105         u32 buffer;
 106         u32 mask;
 107 } drm_r128_depth32_t;
 108
 109 static int compat_r128_depth(struct file *file, unsigned int cmd,
 110                              unsigned long arg)
 111 {
 112         drm_r128_depth32_t depth32;
 113         drm_r128_depth_t __user *depth;
 114
 115         if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32)))
 116                 return -EFAULT;
 117
 118         depth = compat_alloc_user_space(sizeof(*depth));
 119         if (!access_ok(VERIFY_WRITE, depth, sizeof(*depth))
 120             || __put_user(depth32.func, &depth->func)
 121             || __put_user(depth32.n, &depth->n)
 122             || __put_user((int __user *)(unsigned long)depth32.x, &depth->x)
 123             || __put_user((int __user *)(unsigned long)depth32.y, &depth->y)
 124             || __put_user((unsigned int __user *)(unsigned long)depth32.buffer,
 125                           &depth->buffer)
 126             || __put_user((unsigned char __user *)(unsigned long)depth32.mask,
 127                           &depth->mask))
 128                 return -EFAULT;
 129
 130         return drm_ioctl(file, DRM_IOCTL_R128_DEPTH, (unsigned long)depth);
 131
 132 }
 133
 134 typedef struct drm_r128_stipple32 {
 135         u32 mask;
 136 } drm_r128_stipple32_t;
 137
 138 static int compat_r128_stipple(struct file *file, unsigned int cmd,
 139                                unsigned long arg)
 140 {
 141         drm_r128_stipple32_t stipple32;
 142         drm_r128_stipple_t __user *stipple;
 143
 144         if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32)))
 145                 return -EFAULT;
 146
 147         stipple = compat_alloc_user_space(sizeof(*stipple));
 148         if (!access_ok(VERIFY_WRITE, stipple, sizeof(*stipple))
 149             || __put_user((unsigned int __user *)(unsigned long)stipple32.mask,
 150                           &stipple->mask))
 151                 return -EFAULT;
 152
 153         return drm_ioctl(file, DRM_IOCTL_R128_STIPPLE, (unsigned long)stipple);
 154 }
 155
 156 typedef struct drm_r128_getparam32 {
 157         int param;
 158         u32 value;
 159 } drm_r128_getparam32_t;
 160
 161 static int compat_r128_getparam(struct file *file, unsigned int cmd,
 162                                 unsigned long arg)
 163 {
 164         drm_r128_getparam32_t getparam32;
 165         drm_r128_getparam_t __user *getparam;
 166
 167         if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
 168                 return -EFAULT;
 169
 170         getparam = compat_alloc_user_space(sizeof(*getparam));
 171         if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam))
 172             || __put_user(getparam32.param, &getparam->param)
 173             || __put_user((void __user *)(unsigned long)getparam32.value,
 174                           &getparam->value))
 175                 return -EFAULT;
 176
 177         return drm_ioctl(file, DRM_IOCTL_R128_GETPARAM, (unsigned long)getparam);
 178 }
 179
 180 drm_ioctl_compat_t *r128_compat_ioctls[] = {
 181         [DRM_R128_INIT] = compat_r128_init,
 182         [DRM_R128_DEPTH] = compat_r128_depth,
 183         [DRM_R128_STIPPLE] = compat_r128_stipple,
 184         [DRM_R128_GETPARAM] = compat_r128_getparam,
 185 };
 186
 187 /**
 188  * Called whenever a 32-bit process running under a 64-bit kernel
 189  * performs an ioctl on /dev/dri/card<n>.
 190  *
 191  * \param filp file pointer.
 192  * \param cmd command.
 193  * \param arg user argument.
 194  * \return zero on success or negative number on failure.
 195  */
 196 long r128_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 197 {
 198         unsigned int nr = DRM_IOCTL_NR(cmd);
 199         drm_ioctl_compat_t *fn = NULL;
 200         int ret;
 201
 202         if (nr < DRM_COMMAND_BASE)
 203                 return drm_compat_ioctl(filp, cmd, arg);
 204
 205         if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(r128_compat_ioctls))
 206                 fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE];
 207
 208         if (fn != NULL)
 209                 ret = (*fn) (filp, cmd, arg);
 210         else
 211                 ret = drm_ioctl(filp, cmd, arg);
 212
 213         return ret;
 214 }