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 "drmP.h" 35#include "drm.h" 36#include "r128_drm.h" 37 38typedef 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 62static 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 __user *init; 67 68 if (copy_from_user(&init32, (void __user *)arg, sizeof(init32))) 69 return -EFAULT; 70 71 init = compat_alloc_user_space(sizeof(*init)); 72 if (!access_ok(VERIFY_WRITE, init, sizeof(*init)) 73 || __put_user(init32.func, &init->func) 74 || __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset) 75 || __put_user(init32.is_pci, &init->is_pci) 76 || __put_user(init32.cce_mode, &init->cce_mode) 77 || __put_user(init32.cce_secure, &init->cce_secure) 78 || __put_user(init32.ring_size, &init->ring_size) 79 || __put_user(init32.usec_timeout, &init->usec_timeout) 80 || __put_user(init32.fb_bpp, &init->fb_bpp) 81 || __put_user(init32.front_offset, &init->front_offset) 82 || __put_user(init32.front_pitch, &init->front_pitch) 83 || __put_user(init32.back_offset, &init->back_offset) 84 || __put_user(init32.back_pitch, &init->back_pitch) 85 || __put_user(init32.depth_bpp, &init->depth_bpp) 86 || __put_user(init32.depth_offset, &init->depth_offset) 87 || __put_user(init32.depth_pitch, &init->depth_pitch) 88 || __put_user(init32.span_offset, &init->span_offset) 89 || __put_user(init32.fb_offset, &init->fb_offset) 90 || __put_user(init32.mmio_offset, &init->mmio_offset) 91 || __put_user(init32.ring_offset, &init->ring_offset) 92 || __put_user(init32.ring_rptr_offset, &init->ring_rptr_offset) 93 || __put_user(init32.buffers_offset, &init->buffers_offset) 94 || __put_user(init32.agp_textures_offset, 95 &init->agp_textures_offset)) 96 return -EFAULT; 97 98 return drm_ioctl(file->f_path.dentry->d_inode, file, 99 DRM_IOCTL_R128_INIT, (unsigned long)init); 100} 101 102typedef struct drm_r128_depth32 { 103 int func; 104 int n; 105 u32 x; 106 u32 y; 107 u32 buffer; 108 u32 mask; 109} drm_r128_depth32_t; 110 111static int compat_r128_depth(struct file *file, unsigned int cmd, 112 unsigned long arg) 113{ 114 drm_r128_depth32_t depth32; 115 drm_r128_depth_t __user *depth; 116 117 if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32))) 118 return -EFAULT; 119 120 depth = compat_alloc_user_space(sizeof(*depth)); 121 if (!access_ok(VERIFY_WRITE, depth, sizeof(*depth)) 122 || __put_user(depth32.func, &depth->func) 123 || __put_user(depth32.n, &depth->n) 124 || __put_user((int __user *)(unsigned long)depth32.x, &depth->x) 125 || __put_user((int __user *)(unsigned long)depth32.y, &depth->y) 126 || __put_user((unsigned int __user *)(unsigned long)depth32.buffer, 127 &depth->buffer) 128 || __put_user((unsigned char __user *)(unsigned long)depth32.mask, 129 &depth->mask)) 130 return -EFAULT; 131 132 return drm_ioctl(file->f_path.dentry->d_inode, file, 133 DRM_IOCTL_R128_DEPTH, (unsigned long)depth); 134 135} 136 137typedef struct drm_r128_stipple32 { 138 u32 mask; 139} drm_r128_stipple32_t; 140 141static int compat_r128_stipple(struct file *file, unsigned int cmd, 142 unsigned long arg) 143{ 144 drm_r128_stipple32_t stipple32; 145 drm_r128_stipple_t __user *stipple; 146 147 if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32))) 148 return -EFAULT; 149 150 stipple = compat_alloc_user_space(sizeof(*stipple)); 151 if (!access_ok(VERIFY_WRITE, stipple, sizeof(*stipple)) 152 || __put_user((unsigned int __user *)(unsigned long)stipple32.mask, 153 &stipple->mask)) 154 return -EFAULT; 155 156 return drm_ioctl(file->f_path.dentry->d_inode, file, 157 DRM_IOCTL_R128_STIPPLE, (unsigned long)stipple); 158} 159 160typedef struct drm_r128_getparam32 { 161 int param; 162 u32 value; 163} drm_r128_getparam32_t; 164 165static int compat_r128_getparam(struct file *file, unsigned int cmd, 166 unsigned long arg) 167{ 168 drm_r128_getparam32_t getparam32; 169 drm_r128_getparam_t __user *getparam; 170 171 if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32))) 172 return -EFAULT; 173 174 getparam = compat_alloc_user_space(sizeof(*getparam)); 175 if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam)) 176 || __put_user(getparam32.param, &getparam->param) 177 || __put_user((void __user *)(unsigned long)getparam32.value, 178 &getparam->value)) 179 return -EFAULT; 180 181 return drm_ioctl(file->f_path.dentry->d_inode, file, 182 DRM_IOCTL_R128_GETPARAM, (unsigned long)getparam); 183} 184 185drm_ioctl_compat_t *r128_compat_ioctls[] = { 186 [DRM_R128_INIT] = compat_r128_init, 187 [DRM_R128_DEPTH] = compat_r128_depth, 188 [DRM_R128_STIPPLE] = compat_r128_stipple, 189 [DRM_R128_GETPARAM] = compat_r128_getparam, 190}; 191 192/** 193 * Called whenever a 32-bit process running under a 64-bit kernel 194 * performs an ioctl on /dev/dri/card<n>. 195 * 196 * \param filp file pointer. 197 * \param cmd command. 198 * \param arg user argument. 199 * \return zero on success or negative number on failure. 200 */ 201long r128_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 202{ 203 unsigned int nr = DRM_IOCTL_NR(cmd); 204 drm_ioctl_compat_t *fn = NULL; 205 int ret; 206 207 if (nr < DRM_COMMAND_BASE) 208 return drm_compat_ioctl(filp, cmd, arg); 209 210 if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(r128_compat_ioctls)) 211 fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE]; 212 213 lock_kernel(); 214 if (fn != NULL) 215 ret = (*fn) (filp, cmd, arg); 216 else 217 ret = drm_ioctl(filp->f_path.dentry->d_inode, filp, cmd, arg); 218 unlock_kernel(); 219 220 return ret; 221} 222