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/**
* \file mga_ioc32.c
*
* 32-bit ioctl compatibility routines for the MGA 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/mga_drm.h>
#include "mga_drv.h"
typedef struct drm32_mga_init {
int func;
u32 sarea_priv_offset;
int chipset;
int sgram;
unsigned int maccess;
unsigned int fb_cpp;
unsigned int front_offset, front_pitch;
unsigned int back_offset, back_pitch;
unsigned int depth_cpp;
unsigned int depth_offset, depth_pitch;
unsigned int texture_offset[MGA_NR_TEX_HEAPS];
unsigned int texture_size[MGA_NR_TEX_HEAPS];
u32 fb_offset;
u32 mmio_offset;
u32 status_offset;
u32 warp_offset;
u32 primary_offset;
u32 buffers_offset;
} drm_mga_init32_t;
static int compat_mga_init(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_mga_init32_t init32;
drm_mga_init_t __user *init;
int err = 0, i;
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.chipset, &init->chipset)
|| __put_user(init32.sgram, &init->sgram)
|| __put_user(init32.maccess, &init->maccess)
|| __put_user(init32.fb_cpp, &init->fb_cpp)
|| __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_cpp, &init->depth_cpp)
|| __put_user(init32.depth_offset, &init->depth_offset)
|| __put_user(init32.depth_pitch, &init->depth_pitch)
|| __put_user(init32.fb_offset, &init->fb_offset)
|| __put_user(init32.mmio_offset, &init->mmio_offset)
|| __put_user(init32.status_offset, &init->status_offset)
|| __put_user(init32.warp_offset, &init->warp_offset)
|| __put_user(init32.primary_offset, &init->primary_offset)
|| __put_user(init32.buffers_offset, &init->buffers_offset))
return -EFAULT;
for (i = 0; i < MGA_NR_TEX_HEAPS; i++) {
err |=
__put_user(init32.texture_offset[i],
&init->texture_offset[i]);
err |=
__put_user(init32.texture_size[i], &init->texture_size[i]);
}
if (err)
return -EFAULT;
return drm_ioctl(file, DRM_IOCTL_MGA_INIT, (unsigned long)init);
}
typedef struct drm_mga_getparam32 {
int param;
u32 value;
} drm_mga_getparam32_t;
static int compat_mga_getparam(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_mga_getparam32_t getparam32;
drm_mga_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_MGA_GETPARAM, (unsigned long)getparam);
}
typedef struct drm_mga_drm_bootstrap32 {
u32 texture_handle;
u32 texture_size;
u32 primary_size;
u32 secondary_bin_count;
u32 secondary_bin_size;
u32 agp_mode;
u8 agp_size;
} drm_mga_dma_bootstrap32_t;
static int compat_mga_dma_bootstrap(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_mga_dma_bootstrap32_t dma_bootstrap32;
drm_mga_dma_bootstrap_t __user *dma_bootstrap;
int err;
if (copy_from_user(&dma_bootstrap32, (void __user *)arg,
sizeof(dma_bootstrap32)))
return -EFAULT;
dma_bootstrap = compat_alloc_user_space(sizeof(*dma_bootstrap));
if (!access_ok(VERIFY_WRITE, dma_bootstrap, sizeof(*dma_bootstrap))
|| __put_user(dma_bootstrap32.texture_handle,
&dma_bootstrap->texture_handle)
|| __put_user(dma_bootstrap32.texture_size,
&dma_bootstrap->texture_size)
|| __put_user(dma_bootstrap32.primary_size,
&dma_bootstrap->primary_size)
|| __put_user(dma_bootstrap32.secondary_bin_count,
&dma_bootstrap->secondary_bin_count)
|| __put_user(dma_bootstrap32.secondary_bin_size,
&dma_bootstrap->secondary_bin_size)
|| __put_user(dma_bootstrap32.agp_mode, &dma_bootstrap->agp_mode)
|| __put_user(dma_bootstrap32.agp_size, &dma_bootstrap->agp_size))
return -EFAULT;
err = drm_ioctl(file, DRM_IOCTL_MGA_DMA_BOOTSTRAP,
(unsigned long)dma_bootstrap);
if (err)
return err;
if (__get_user(dma_bootstrap32.texture_handle,
&dma_bootstrap->texture_handle)
|| __get_user(dma_bootstrap32.texture_size,
&dma_bootstrap->texture_size)
|| __get_user(dma_bootstrap32.primary_size,
&dma_bootstrap->primary_size)
|| __get_user(dma_bootstrap32.secondary_bin_count,
&dma_bootstrap->secondary_bin_count)
|| __get_user(dma_bootstrap32.secondary_bin_size,
&dma_bootstrap->secondary_bin_size)
|| __get_user(dma_bootstrap32.agp_mode, &dma_bootstrap->agp_mode)
|| __get_user(dma_bootstrap32.agp_size, &dma_bootstrap->agp_size))
return -EFAULT;
if (copy_to_user((void __user *)arg, &dma_bootstrap32,
sizeof(dma_bootstrap32)))
return -EFAULT;
return 0;
}
drm_ioctl_compat_t *mga_compat_ioctls[] = {
[DRM_MGA_INIT] = compat_mga_init,
[DRM_MGA_GETPARAM] = compat_mga_getparam,
[DRM_MGA_DMA_BOOTSTRAP] = compat_mga_dma_bootstrap,
};
/**
* 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 mga_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 + ARRAY_SIZE(mga_compat_ioctls))
fn = mga_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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