/*
* AGPGART driver frontend compatibility ioctls
* Copyright (C) 2004 Silicon Graphics, Inc.
* Copyright (C) 2002-2003 Dave Jones
* Copyright (C) 1999 Jeff Hartmann
* Copyright (C) 1999 Precision Insight, Inc.
* Copyright (C) 1999 Xi Graphics, Inc.
*
* 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 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
* JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS 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/kernel.h>
#include <linux/pci.h>
#include <linux/agpgart.h>
#include <asm/uaccess.h>
#include "agp.h"
#include "compat_ioctl.h"
static int compat_agpioc_info_wrap(struct agp_file_private *priv, void __user *arg)
{
struct agp_info32 userinfo;
struct agp_kern_info kerninfo;
agp_copy_info(agp_bridge, &kerninfo);
userinfo.version.major = kerninfo.version.major;
userinfo.version.minor = kerninfo.version.minor;
userinfo.bridge_id = kerninfo.device->vendor |
(kerninfo.device->device << 16);
userinfo.agp_mode = kerninfo.mode;
userinfo.aper_base = (compat_long_t)kerninfo.aper_base;
userinfo.aper_size = kerninfo.aper_size;
userinfo.pg_total = userinfo.pg_system = kerninfo.max_memory;
userinfo.pg_used = kerninfo.current_memory;
if (copy_to_user(arg, &userinfo, sizeof(userinfo)))
return -EFAULT;
return 0;
}
static int compat_agpioc_reserve_wrap(struct agp_file_private *priv, void __user *arg)
{
struct agp_region32 ureserve;
struct agp_region kreserve;
struct agp_client *client;
struct agp_file_private *client_priv;
DBG("");
if (copy_from_user(&ureserve, arg, sizeof(ureserve)))
return -EFAULT;
if ((unsigned) ureserve.seg_count >= ~0U/sizeof(struct agp_segment32))
return -EFAULT;
kreserve.pid = ureserve.pid;
kreserve.seg_count = ureserve.seg_count;
client = agp_find_client_by_pid(kreserve.pid);
if (kreserve.seg_count == 0) {
/* remove a client */
client_priv = agp_find_private(kreserve.pid);
if (client_priv != NULL) {
set_bit(AGP_FF_IS_CLIENT, &client_priv->access_flags);
set_bit(AGP_FF_IS_VALID, &client_priv->access_flags);
}
if (client == NULL) {
/* client is already removed */
return 0;
}
return agp_remove_client(kreserve.pid);
} else {
struct agp_segment32 *usegment;
struct agp_segment *ksegment;
int seg;
if (ureserve.seg_count >= 16384)
return -EINVAL;
usegment = kmalloc(sizeof(*usegment) * ureserve.seg_count, GFP_KERNEL);
if (!usegment)
return -ENOMEM;
ksegment = kmalloc(sizeof(*ksegment) * kreserve.seg_count, GFP_KERNEL);
if (!ksegment) {
kfree(usegment);
return -ENOMEM;
}
if (copy_from_user(usegment, (void __user *) ureserve.seg_list,
sizeof(*usegment) * ureserve.seg_count)) {
kfree(usegment);
kfree(ksegment);
return -EFAULT;
}
for (seg = 0; seg < ureserve.seg_count; seg++) {
ksegment[seg].pg_start = usegment[seg].pg_start;
ksegment[seg].pg_count = usegment[seg].pg_count;
ksegment[seg].prot = usegment[seg].prot;
}
kfree(usegment);
kreserve.seg_list = ksegment;
if (client == NULL) {
/* Create the client and add the segment */
client = agp_create_client(kreserve.pid);
if (client == NULL) {
kfree(ksegment);
return -ENOMEM;
}
client_priv = agp_find_private(kreserve.pid);
if (client_priv != NULL) {
set_bit(AGP_FF_IS_CLIENT, &client_priv->access_flags);
set_bit(AGP_FF_IS_VALID, &client_priv->access_flags);
}
}
return agp_create_segment(client, &kreserve);
}
/* Will never really happen */
return -EINVAL;
}
static int compat_agpioc_allocate_wrap(struct agp_file_private *priv, void __user *arg)
{
struct agp_memory *memory;
struct agp_allocate32 alloc;
DBG("");
if (copy_from_user(&alloc, arg, sizeof(alloc)))
return -EFAULT;
memory = agp_allocate_memory_wrap(alloc.pg_count, alloc.type);
if (memory == NULL)
return -ENOMEM;
alloc.key = memory->key;
alloc.physical = memory->physical;
if (copy_to_user(arg, &alloc, sizeof(alloc))) {
agp_free_memory_wrap(memory);
return -EFAULT;
}
return 0;
}
static int compat_agpioc_bind_wrap(struct agp_file_private *priv, void __user *arg)
{
struct agp_bind32 bind_info;
struct agp_memory *memory;
DBG("");
if (copy_from_user(&bind_info, arg, sizeof(bind_info)))
return -EFAULT;
memory = agp_find_mem_by_key(bind_info.key);
if (memory == NULL)
return -EINVAL;
return agp_bind_memory(memory, bind_info.pg_start);
}
static int compat_agpioc_unbind_wrap(struct agp_file_private *priv, void __user *arg)
{
struct agp_memory *memory;
struct agp_unbind32 unbind;
DBG("");
if (copy_from_user(&unbind, arg, sizeof(unbind)))
return -EFAULT;
memory = agp_find_mem_by_key(unbind.key);
if (memory == NULL)
return -EINVAL;
return agp_unbind_memory(memory);
}
long compat_agp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct agp_file_private *curr_priv = file->private_data;
int ret_val = -ENOTTY;
mutex_lock(&(agp_fe.agp_mutex));
if ((agp_fe.current_controller == NULL) &&
(cmd != AGPIOC_ACQUIRE32)) {
ret_val = -EINVAL;
goto ioctl_out;
}
if ((agp_fe.backend_acquired != TRUE) &&
(cmd != AGPIOC_ACQUIRE32)) {
ret_val = -EBUSY;
goto ioctl_out;
}
if (cmd != AGPIOC_ACQUIRE32) {
if (!(test_bit(AGP_FF_IS_CONTROLLER, &curr_priv->access_flags))) {
ret_val = -EPERM;
goto ioctl_out;
}
/* Use the original pid of the controller,
* in case it's threaded */
if (agp_fe.current_controller->pid != curr_priv->my_pid) {
ret_val = -EBUSY;
goto ioctl_out;
}
}
switch (cmd) {
case AGPIOC_INFO32:
ret_val = compat_agpioc_info_wrap(curr_priv, (void __user *) arg);
break;
case AGPIOC_ACQUIRE32:
ret_val = agpioc_acquire_wrap(curr_priv);
break;
case AGPIOC_RELEASE32:
ret_val = agpioc_release_wrap(curr_priv);
break;
case AGPIOC_SETUP32:
ret_val = agpioc_setup_wrap(curr_priv, (void __user *) arg);
break;
case AGPIOC_RESERVE32:
ret_val = compat_agpioc_reserve_wrap(curr_priv, (void __user *) arg);
break;
case AGPIOC_PROTECT32:
ret_val = agpioc_protect_wrap(curr_priv);
break;
case AGPIOC_ALLOCATE32:
ret_val = compat_agpioc_allocate_wrap(curr_priv, (void __user *) arg);
break;
case AGPIOC_DEALLOCATE32:
ret_val = agpioc_deallocate_wrap(curr_priv, (int) arg);
break;
case AGPIOC_BIND32:
ret_val = compat_agpioc_bind_wrap(curr_priv, (void __user *) arg);
break;
case AGPIOC_UNBIND32:
ret_val = compat_agpioc_unbind_wrap(curr_priv, (void __user *) arg);
break;
}
ioctl_out:
DBG("ioctl returns %d\n", ret_val);
mutex_unlock(&(agp_fe.agp_mutex));
return ret_val;
}
