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 #include "r128_drv.h"
  37
  38 typedef struct drm_r128_init32 {
  39         int func;
  40         unsigned int sarea_priv_offset;
  41         int is_pci;
  42         int cce_mode;
  43         int cce_secure;
  44         int ring_size;
  45         int usec_timeout;
  46
  47         unsigned int fb_bpp;
  48         unsigned int front_offset, front_pitch;
  49         unsigned int back_offset, back_pitch;
  50         unsigned int depth_bpp;
  51         unsigned int depth_offset, depth_pitch;
  52         unsigned int span_offset;
  53
  54         unsigned int fb_offset;
  55         unsigned int mmio_offset;
  56         unsigned int ring_offset;
  57         unsigned int ring_rptr_offset;
  58         unsigned int buffers_offset;
  59         unsigned int agp_textures_offset;
  60 } drm_r128_init32_t;
  61
  62 static int compat_r128_init(struct file *file, unsigned int cmd,
  63                             unsigned long arg)
  64 {
  65         drm_r128_init32_t init32;
  66         drm_r128_init_t init;
  67
  68         if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
  69                 return -EFAULT;
  70
  71         init.func = init32.func;
  72         init.sarea_priv_offset = init32.sarea_priv_offset;
  73         init.is_pci = init32.is_pci;
  74         init.cce_mode = init32.cce_mode;
  75         init.cce_secure = init32.cce_secure;
  76         init.ring_size = init32.ring_size;
  77         init.usec_timeout = init32.usec_timeout;
  78         init.fb_bpp = init32.fb_bpp;
  79         init.front_offset = init32.front_offset;
  80         init.front_pitch = init32.front_pitch;
  81         init.back_offset = init32.back_offset;
  82         init.back_pitch = init32.back_pitch;
  83         init.depth_bpp = init32.depth_bpp;
  84         init.depth_offset = init32.depth_offset;
  85         init.depth_pitch = init32.depth_pitch;
  86         init.span_offset = init32.span_offset;
  87         init.fb_offset = init32.fb_offset;
  88         init.mmio_offset = init32.mmio_offset;
  89         init.ring_offset = init32.ring_offset;
  90         init.ring_rptr_offset = init32.ring_rptr_offset;
  91         init.buffers_offset = init32.buffers_offset;
  92         init.agp_textures_offset = init32.agp_textures_offset;
  93
  94         return drm_ioctl_kernel(file, r128_cce_init, &init,
  95                         DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
  96 }
  97
  98 typedef struct drm_r128_depth32 {
  99         int func;
 100         int n;
 101         u32 x;
 102         u32 y;
 103         u32 buffer;
 104         u32 mask;
 105 } drm_r128_depth32_t;
 106
 107 static int compat_r128_depth(struct file *file, unsigned int cmd,
 108                              unsigned long arg)
 109 {
 110         drm_r128_depth32_t depth32;
 111         drm_r128_depth_t depth;
 112
 113         if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32)))
 114                 return -EFAULT;
 115
 116         depth.func = depth32.func;
 117         depth.n = depth32.n;
 118         depth.x = compat_ptr(depth32.x);
 119         depth.y = compat_ptr(depth32.y);
 120         depth.buffer = compat_ptr(depth32.buffer);
 121         depth.mask = compat_ptr(depth32.mask);
 122
 123         return drm_ioctl_kernel(file, r128_cce_depth, &depth, DRM_AUTH);
 124 }
 125
 126 typedef struct drm_r128_stipple32 {
 127         u32 mask;
 128 } drm_r128_stipple32_t;
 129
 130 static int compat_r128_stipple(struct file *file, unsigned int cmd,
 131                                unsigned long arg)
 132 {
 133         drm_r128_stipple32_t stipple32;
 134         drm_r128_stipple_t stipple;
 135
 136         if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32)))
 137                 return -EFAULT;
 138
 139         stipple.mask = compat_ptr(stipple32.mask);
 140
 141         return drm_ioctl_kernel(file, r128_cce_stipple, &stipple, DRM_AUTH);
 142 }
 143
 144 typedef struct drm_r128_getparam32 {
 145         int param;
 146         u32 value;
 147 } drm_r128_getparam32_t;
 148
 149 static int compat_r128_getparam(struct file *file, unsigned int cmd,
 150                                 unsigned long arg)
 151 {
 152         drm_r128_getparam32_t getparam32;
 153         drm_r128_getparam_t getparam;
 154
 155         if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
 156                 return -EFAULT;
 157
 158         getparam.param = getparam32.param;
 159         getparam.value = compat_ptr(getparam32.value);
 160
 161         return drm_ioctl_kernel(file, r128_getparam, &getparam, DRM_AUTH);
 162 }
 163
 164 drm_ioctl_compat_t *r128_compat_ioctls[] = {
 165         [DRM_R128_INIT] = compat_r128_init,
 166         [DRM_R128_DEPTH] = compat_r128_depth,
 167         [DRM_R128_STIPPLE] = compat_r128_stipple,
 168         [DRM_R128_GETPARAM] = compat_r128_getparam,
 169 };
 170
 171 /**
 172  * Called whenever a 32-bit process running under a 64-bit kernel
 173  * performs an ioctl on /dev/dri/card<n>.
 174  *
 175  * \param filp file pointer.
 176  * \param cmd command.
 177  * \param arg user argument.
 178  * \return zero on success or negative number on failure.
 179  */
 180 long r128_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 181 {
 182         unsigned int nr = DRM_IOCTL_NR(cmd);
 183         drm_ioctl_compat_t *fn = NULL;
 184         int ret;
 185
 186         if (nr < DRM_COMMAND_BASE)
 187                 return drm_compat_ioctl(filp, cmd, arg);
 188
 189         if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(r128_compat_ioctls))
 190                 fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE];
 191
 192         if (fn != NULL)
 193                 ret = (*fn) (filp, cmd, arg);
 194         else
 195                 ret = drm_ioctl(filp, cmd, arg);
 196
 197         return ret;
 198 }