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/**
* \file r128_ioc32.c
*
* 32-bit ioctl compatibility routines for the R128 DRM.
*
* \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich
*
* Copyright (C) Paul Mackerras 2005
* Copyright (C) Egbert Eich 2003,2004
* Copyright (C) Dave Airlie 2005
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <linux/compat.h>
#include <drm/drmP.h>
#include <drm/r128_drm.h>
typedef struct drm_r128_init32 {
int func;
unsigned int sarea_priv_offset;
int is_pci;
int cce_mode;
int cce_secure;
int ring_size;
int usec_timeout;
unsigned int fb_bpp;
unsigned int front_offset, front_pitch;
unsigned int back_offset, back_pitch;
unsigned int depth_bpp;
unsigned int depth_offset, depth_pitch;
unsigned int span_offset;
unsigned int fb_offset;
unsigned int mmio_offset;
unsigned int ring_offset;
unsigned int ring_rptr_offset;
unsigned int buffers_offset;
unsigned int agp_textures_offset;
} drm_r128_init32_t;
static int compat_r128_init(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_r128_init32_t init32;
drm_r128_init_t __user *init;
if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
return -EFAULT;
init = compat_alloc_user_space(sizeof(*init));
if (!access_ok(VERIFY_WRITE, init, sizeof(*init))
|| __put_user(init32.func, &init->func)
|| __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset)
|| __put_user(init32.is_pci, &init->is_pci)
|| __put_user(init32.cce_mode, &init->cce_mode)
|| __put_user(init32.cce_secure, &init->cce_secure)
|| __put_user(init32.ring_size, &init->ring_size)
|| __put_user(init32.usec_timeout, &init->usec_timeout)
|| __put_user(init32.fb_bpp, &init->fb_bpp)
|| __put_user(init32.front_offset, &init->front_offset)
|| __put_user(init32.front_pitch, &init->front_pitch)
|| __put_user(init32.back_offset, &init->back_offset)
|| __put_user(init32.back_pitch, &init->back_pitch)
|| __put_user(init32.depth_bpp, &init->depth_bpp)
|| __put_user(init32.depth_offset, &init->depth_offset)
|| __put_user(init32.depth_pitch, &init->depth_pitch)
|| __put_user(init32.span_offset, &init->span_offset)
|| __put_user(init32.fb_offset, &init->fb_offset)
|| __put_user(init32.mmio_offset, &init->mmio_offset)
|| __put_user(init32.ring_offset, &init->ring_offset)
|| __put_user(init32.ring_rptr_offset, &init->ring_rptr_offset)
|| __put_user(init32.buffers_offset, &init->buffers_offset)
|| __put_user(init32.agp_textures_offset,
&init->agp_textures_offset))
return -EFAULT;
return drm_ioctl(file, DRM_IOCTL_R128_INIT, (unsigned long)init);
}
typedef struct drm_r128_depth32 {
int func;
int n;
u32 x;
u32 y;
u32 buffer;
u32 mask;
} drm_r128_depth32_t;
static int compat_r128_depth(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_r128_depth32_t depth32;
drm_r128_depth_t __user *depth;
if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32)))
return -EFAULT;
depth = compat_alloc_user_space(sizeof(*depth));
if (!access_ok(VERIFY_WRITE, depth, sizeof(*depth))
|| __put_user(depth32.func, &depth->func)
|| __put_user(depth32.n, &depth->n)
|| __put_user((int __user *)(unsigned long)depth32.x, &depth->x)
|| __put_user((int __user *)(unsigned long)depth32.y, &depth->y)
|| __put_user((unsigned int __user *)(unsigned long)depth32.buffer,
&depth->buffer)
|| __put_user((unsigned char __user *)(unsigned long)depth32.mask,
&depth->mask))
return -EFAULT;
return drm_ioctl(file, DRM_IOCTL_R128_DEPTH, (unsigned long)depth);
}
typedef struct drm_r128_stipple32 {
u32 mask;
} drm_r128_stipple32_t;
static int compat_r128_stipple(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_r128_stipple32_t stipple32;
drm_r128_stipple_t __user *stipple;
if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32)))
return -EFAULT;
stipple = compat_alloc_user_space(sizeof(*stipple));
if (!access_ok(VERIFY_WRITE, stipple, sizeof(*stipple))
|| __put_user((unsigned int __user *)(unsigned long)stipple32.mask,
&stipple->mask))
return -EFAULT;
return drm_ioctl(file, DRM_IOCTL_R128_STIPPLE, (unsigned long)stipple);
}
typedef struct drm_r128_getparam32 {
int param;
u32 value;
} drm_r128_getparam32_t;
static int compat_r128_getparam(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_r128_getparam32_t getparam32;
drm_r128_getparam_t __user *getparam;
if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
return -EFAULT;
getparam = compat_alloc_user_space(sizeof(*getparam));
if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam))
|| __put_user(getparam32.param, &getparam->param)
|| __put_user((void __user *)(unsigned long)getparam32.value,
&getparam->value))
return -EFAULT;
return drm_ioctl(file, DRM_IOCTL_R128_GETPARAM, (unsigned long)getparam);
}
drm_ioctl_compat_t *r128_compat_ioctls[] = {
[DRM_R128_INIT] = compat_r128_init,
[DRM_R128_DEPTH] = compat_r128_depth,
[DRM_R128_STIPPLE] = compat_r128_stipple,
[DRM_R128_GETPARAM] = compat_r128_getparam,
};
/**
* Called whenever a 32-bit process running under a 64-bit kernel
* performs an ioctl on /dev/dri/card<n>.
*
* \param filp file pointer.
* \param cmd command.
* \param arg user argument.
* \return zero on success or negative number on failure.
*/
long r128_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
unsigned int nr = DRM_IOCTL_NR(cmd);
drm_ioctl_compat_t *fn = NULL;
int ret;
if (nr < DRM_COMMAND_BASE)
return drm_compat_ioctl(filp, cmd, arg);
if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(r128_compat_ioctls))
fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE];
if (fn != NULL)
ret = (*fn) (filp, cmd, arg);
else
ret = drm_ioctl(filp, cmd, arg);
return ret;
}
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