LXR linux/drivers/gpu/drm/mga/mga

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