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/*
* (C) Copyright IBM Corporation 2007
* Copyright (C) Paul Mackerras 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
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS AND/OR THEIR SUPPLIERS 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.
*
* Authors:
* Ian Romanick <idr@us.ibm.com>
*/
#include <linux/compat.h>
#include "drmP.h"
#include "drm.h"
#include "xgi_drm.h"
/* This is copied from drm_ioc32.c.
*/
struct drm_map32 {
u32 offset; /**< Requested physical address (0 for SAREA)*/
u32 size; /**< Requested physical size (bytes) */
enum drm_map_type type; /**< Type of memory to map */
enum drm_map_flags flags; /**< Flags */
u32 handle; /**< User-space: "Handle" to pass to mmap() */
int mtrr; /**< MTRR slot used */
};
struct drm32_xgi_bootstrap {
struct drm_map32 gart;
};
extern int xgi_bootstrap(struct drm_device *, void *, struct drm_file *);
static int compat_xgi_bootstrap(struct file *filp, unsigned int cmd,
unsigned long arg)
{
struct drm32_xgi_bootstrap __user *const argp = (void __user *)arg;
struct drm32_xgi_bootstrap bs32;
struct xgi_bootstrap __user *bs;
int err;
void *handle;
if (copy_from_user(&bs32, argp, sizeof(bs32))) {
return -EFAULT;
}
bs = compat_alloc_user_space(sizeof(*bs));
if (!access_ok(VERIFY_WRITE, bs, sizeof(*bs))) {
return -EFAULT;
}
if (__put_user(bs32.gart.offset, &bs->gart.offset)
|| __put_user(bs32.gart.size, &bs->gart.size)
|| __put_user(bs32.gart.type, &bs->gart.type)
|| __put_user(bs32.gart.flags, &bs->gart.flags)) {
return -EFAULT;
}
err = drm_ioctl(filp->f_dentry->d_inode, filp, XGI_IOCTL_BOOTSTRAP,
(unsigned long)bs);
if (err) {
return err;
}
if (__get_user(bs32.gart.offset, &bs->gart.offset)
|| __get_user(bs32.gart.mtrr, &bs->gart.mtrr)
|| __get_user(handle, &bs->gart.handle)) {
return -EFAULT;
}
bs32.gart.handle = (unsigned long)handle;
if (bs32.gart.handle != (unsigned long)handle && printk_ratelimit()) {
printk(KERN_ERR "%s truncated handle %p for type %d "
"offset %x\n",
__func__, handle, bs32.gart.type, bs32.gart.offset);
}
if (copy_to_user(argp, &bs32, sizeof(bs32))) {
return -EFAULT;
}
return 0;
}
drm_ioctl_compat_t *xgi_compat_ioctls[] = {
[DRM_XGI_BOOTSTRAP] = compat_xgi_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 xgi_compat_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
const 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(xgi_compat_ioctls))
fn = xgi_compat_ioctls[nr - DRM_COMMAND_BASE];
lock_kernel();
ret = (fn != NULL)
? (*fn)(filp, cmd, arg)
: drm_ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
unlock_kernel();
return ret;
}
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