drivers/gpu/drm/mga/mga_ioc32.c

   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 #include <linux/compat.h>
  34
  35 #include <drm/drmP.h>
  36 #include <drm/mga_drm.h>
  37 #include "mga_drv.h"
  38
  39 typedef struct drm32_mga_init {
  40         int func;
  41         u32 sarea_priv_offset;
  42         int chipset;
  43         int sgram;
  44         unsigned int maccess;
  45         unsigned int fb_cpp;
  46         unsigned int front_offset, front_pitch;
  47         unsigned int back_offset, back_pitch;
  48         unsigned int depth_cpp;
  49         unsigned int depth_offset, depth_pitch;
  50         unsigned int texture_offset[MGA_NR_TEX_HEAPS];
  51         unsigned int texture_size[MGA_NR_TEX_HEAPS];
  52         u32 fb_offset;
  53         u32 mmio_offset;
  54         u32 status_offset;
  55         u32 warp_offset;
  56         u32 primary_offset;
  57         u32 buffers_offset;
  58 } drm_mga_init32_t;
  59
  60 static int compat_mga_init(struct file *file, unsigned int cmd,
  61                            unsigned long arg)
  62 {
  63         drm_mga_init32_t init32;
  64         drm_mga_init_t init;
  65
  66         if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
  67                 return -EFAULT;
  68
  69         init.func = init32.func;
  70         init.sarea_priv_offset = init32.sarea_priv_offset;
  71         memcpy(&init.chipset, &init32.chipset,
  72                 offsetof(drm_mga_init_t, fb_offset) -
  73                 offsetof(drm_mga_init_t, chipset));
  74         init.fb_offset = init32.fb_offset;
  75         init.mmio_offset = init32.mmio_offset;
  76         init.status_offset = init32.status_offset;
  77         init.warp_offset = init32.warp_offset;
  78         init.primary_offset = init32.primary_offset;
  79         init.buffers_offset = init32.buffers_offset;
  80
  81         return drm_ioctl_kernel(file, mga_dma_init, &init,
  82                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
  83 }
  84
  85 typedef struct drm_mga_getparam32 {
  86         int param;
  87         u32 value;
  88 } drm_mga_getparam32_t;
  89
  90 static int compat_mga_getparam(struct file *file, unsigned int cmd,
  91                                unsigned long arg)
  92 {
  93         drm_mga_getparam32_t getparam32;
  94         drm_mga_getparam_t getparam;
  95
  96         if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
  97                 return -EFAULT;
  98
  99         getparam.param = getparam32.param;
 100         getparam.value = compat_ptr(getparam32.value);
 101         return drm_ioctl_kernel(file, mga_getparam, &getparam, DRM_AUTH);
 102 }
 103
 104 typedef struct drm_mga_drm_bootstrap32 {
 105         u32 texture_handle;
 106         u32 texture_size;
 107         u32 primary_size;
 108         u32 secondary_bin_count;
 109         u32 secondary_bin_size;
 110         u32 agp_mode;
 111         u8 agp_size;
 112 } drm_mga_dma_bootstrap32_t;
 113
 114 static int compat_mga_dma_bootstrap(struct file *file, unsigned int cmd,
 115                                     unsigned long arg)
 116 {
 117         drm_mga_dma_bootstrap32_t dma_bootstrap32;
 118         drm_mga_dma_bootstrap_t dma_bootstrap;
 119         int err;
 120
 121         if (copy_from_user(&dma_bootstrap32, (void __user *)arg,
 122                            sizeof(dma_bootstrap32)))
 123                 return -EFAULT;
 124
 125         dma_bootstrap.texture_handle = dma_bootstrap32.texture_handle;
 126         dma_bootstrap.texture_size = dma_bootstrap32.texture_size;
 127         dma_bootstrap.primary_size = dma_bootstrap32.primary_size;
 128         dma_bootstrap.secondary_bin_count = dma_bootstrap32.secondary_bin_count;
 129         dma_bootstrap.secondary_bin_size = dma_bootstrap32.secondary_bin_size;
 130         dma_bootstrap.agp_mode = dma_bootstrap32.agp_mode;
 131         dma_bootstrap.agp_size = dma_bootstrap32.agp_size;
 132
 133         err = drm_ioctl_kernel(file, mga_dma_bootstrap, &dma_bootstrap,
 134                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 135         if (err)
 136                 return err;
 137
 138         dma_bootstrap32.texture_handle = dma_bootstrap.texture_handle;
 139         dma_bootstrap32.texture_size = dma_bootstrap.texture_size;
 140         dma_bootstrap32.primary_size = dma_bootstrap.primary_size;
 141         dma_bootstrap32.secondary_bin_count = dma_bootstrap.secondary_bin_count;
 142         dma_bootstrap32.secondary_bin_size = dma_bootstrap.secondary_bin_size;
 143         dma_bootstrap32.agp_mode = dma_bootstrap.agp_mode;
 144         dma_bootstrap32.agp_size = dma_bootstrap.agp_size;
 145         if (copy_to_user((void __user *)arg, &dma_bootstrap32,
 146                          sizeof(dma_bootstrap32)))
 147                 return -EFAULT;
 148
 149         return 0;
 150 }
 151
 152 static struct {
 153         drm_ioctl_compat_t *fn;
 154         char *name;
 155 } mga_compat_ioctls[] = {
 156 #define DRM_IOCTL32_DEF(n, f)[DRM_##n] = {.fn = f, .name = #n}
 157         DRM_IOCTL32_DEF(MGA_INIT, compat_mga_init),
 158         DRM_IOCTL32_DEF(MGA_GETPARAM, compat_mga_getparam),
 159         DRM_IOCTL32_DEF(MGA_DMA_BOOTSTRAP, compat_mga_dma_bootstrap),
 160 };
 161
 162 /**
 163  * Called whenever a 32-bit process running under a 64-bit kernel
 164  * performs an ioctl on /dev/dri/card<n>.
 165  *
 166  * \param filp file pointer.
 167  * \param cmd command.
 168  * \param arg user argument.
 169  * \return zero on success or negative number on failure.
 170  */
 171 long mga_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 172 {
 173         unsigned int nr = DRM_IOCTL_NR(cmd);
 174         struct drm_file *file_priv = filp->private_data;
 175         drm_ioctl_compat_t *fn = NULL;
 176         int ret;
 177
 178         if (nr < DRM_COMMAND_BASE)
 179                 return drm_compat_ioctl(filp, cmd, arg);
 180
 181         if (nr >= DRM_COMMAND_BASE + ARRAY_SIZE(mga_compat_ioctls))
 182                 return drm_ioctl(filp, cmd, arg);
 183
 184         fn = mga_compat_ioctls[nr - DRM_COMMAND_BASE].fn;
 185         if (!fn)
 186                 return drm_ioctl(filp, cmd, arg);
 187
 188         DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
 189                   task_pid_nr(current),
 190                   (long)old_encode_dev(file_priv->minor->kdev->devt),
 191                   file_priv->authenticated,
 192                   mga_compat_ioctls[nr - DRM_COMMAND_BASE].name);
 193         ret = (*fn) (filp, cmd, arg);
 194         if (ret)
 195                 DRM_DEBUG("ret = %d\n", ret);
 196         return ret;
 197 }