/**
* \file drm_ioctl.c
* IOCTL processing for DRM
*
* \author Rickard E. (Rik) Faith <faith@valinux.com>
* \author Gareth Hughes <gareth@valinux.com>
*/
/*
* Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com
*
* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* 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
* VA LINUX SYSTEMS AND/OR ITS 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.
*/
#include "drmP.h"
#include "drm_core.h"
#include "linux/pci.h"
/**
* Get the bus id.
*
* \param inode device inode.
* \param file_priv DRM file private.
* \param cmd command.
* \param arg user argument, pointing to a drm_unique structure.
* \return zero on success or a negative number on failure.
*
* Copies the bus id from drm_device::unique into user space.
*/
int drm_getunique(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_unique *u = data;
struct drm_master *master = file_priv->master;
if (u->unique_len >= master->unique_len) {
if (copy_to_user(u->unique, master->unique, master->unique_len))
return -EFAULT;
}
u->unique_len = master->unique_len;
return 0;
}
/**
* Set the bus id.
*
* \param inode device inode.
* \param file_priv DRM file private.
* \param cmd command.
* \param arg user argument, pointing to a drm_unique structure.
* \return zero on success or a negative number on failure.
*
* Copies the bus id from userspace into drm_device::unique, and verifies that
* it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
* in interface version 1.1 and will return EBUSY when setversion has requested
* version 1.1 or greater.
*/
int drm_setunique(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_unique *u = data;
struct drm_master *master = file_priv->master;
int domain, bus, slot, func, ret;
if (master->unique_len || master->unique)
return -EBUSY;
if (!u->unique_len || u->unique_len > 1024)
return -EINVAL;
master->unique_len = u->unique_len;
master->unique_size = u->unique_len + 1;
master->unique = kmalloc(master->unique_size, GFP_KERNEL);
if (!master->unique)
return -ENOMEM;
if (copy_from_user(master->unique, u->unique, master->unique_len))
return -EFAULT;
master->unique[master->unique_len] = '\0';
dev->devname = kmalloc(strlen(dev->driver->pci_driver.name) +
strlen(master->unique) + 2, GFP_KERNEL);
if (!dev->devname)
return -ENOMEM;
sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
master->unique);
/* Return error if the busid submitted doesn't match the device's actual
* busid.
*/
ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
if (ret != 3)
return -EINVAL;
domain = bus >> 8;
bus &= 0xff;
if ((domain != drm_get_pci_domain(dev)) ||
(bus != dev->pdev->bus->number) ||
(slot != PCI_SLOT(dev->pdev->devfn)) ||
(func != PCI_FUNC(dev->pdev->devfn)))
return -EINVAL;
return 0;
}
static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
{
struct drm_master *master = file_priv->master;
int len;
if (master->unique != NULL)
return -EBUSY;
master->unique_len = 40;
master->unique_size = master->unique_len;
master->unique = kmalloc(master->unique_size, GFP_KERNEL);
if (master->unique == NULL)
return -ENOMEM;
len = snprintf(master->unique, master->unique_len, "pci:%04x:%02x:%02x.%d",
drm_get_pci_domain(dev),
dev->pdev->bus->number,
PCI_SLOT(dev->pdev->devfn),
PCI_FUNC(dev->pdev->devfn));
if (len >= master->unique_len)
DRM_ERROR("buffer overflow");
else
master->unique_len = len;
dev->devname = kmalloc(strlen(dev->driver->pci_driver.name) +
master->unique_len + 2, GFP_KERNEL);
if (dev->devname == NULL)
return -ENOMEM;
sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
master->unique);
return 0;
}
/**
* Get a mapping information.
*
* \param inode device inode.
* \param file_priv DRM file private.
* \param cmd command.
* \param arg user argument, pointing to a drm_map structure.
*
* \return zero on success or a negative number on failure.
*
* Searches for the mapping with the specified offset and copies its information
* into userspace
*/
int drm_getmap(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_map *map = data;
struct drm_map_list *r_list = NULL;
struct list_head *list;
int idx;
int i;
idx = map->offset;
mutex_lock(&dev->struct_mutex);
if (idx < 0) {
mutex_unlock(&dev->struct_mutex);
return -EINVAL;
}
i = 0;
list_for_each(list, &dev->maplist) {
if (i == idx) {
r_list = list_entry(list, struct drm_map_list, head);
break;
}
i++;
}
if (!r_list || !r_list->map) {
mutex_unlock(&dev->struct_mutex);
return -EINVAL;
}
map->offset = r_list->map->offset;
map->size = r_list->map->size;
map->type = r_list->map->type;
map->flags = r_list->map->flags;
map->handle = (void *)(unsigned long) r_list->user_token;
map->mtrr = r_list->map->mtrr;
mutex_unlock(&dev->struct_mutex);
return 0;
}
/**
* Get client information.
*
* \param inode device inode.
* \param file_priv DRM file private.
* \param cmd command.
* \param arg user argument, pointing to a drm_client structure.
*
* \return zero on success or a negative number on failure.
*
* Searches for the client with the specified index and copies its information
* into userspace
*/
int drm_getclient(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_client *client = data;
struct drm_file *pt;
int idx;
int i;
idx = client->idx;
mutex_lock(&dev->struct_mutex);
i = 0;
list_for_each_entry(pt, &dev->filelist, lhead) {
if (i++ >= idx) {
client->auth = pt->authenticated;
client->pid = pt->pid;
client->uid = pt->uid;
client->magic = pt->magic;
client->iocs = pt->ioctl_count;
mutex_unlock(&dev->struct_mutex);
return 0;
}
}
mutex_unlock(&dev->struct_mutex);
return -EINVAL;
}
/**
* Get statistics information.
*
* \param inode device inode.
* \param file_priv DRM file private.
* \param cmd command.
* \param arg user argument, pointing to a drm_stats structure.
*
* \return zero on success or a negative number on failure.
*/
int drm_getstats(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_stats *stats = data;
int i;
memset(stats, 0, sizeof(*stats));
mutex_lock(&dev->struct_mutex);
for (i = 0; i < dev->counters; i++) {
if (dev->types[i] == _DRM_STAT_LOCK)
stats->data[i].value =
(file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0);
else
stats->data[i].value = atomic_read(&dev->counts[i]);
stats->data[i].type = dev->types[i];
}
stats->count = dev->counters;
mutex_unlock(&dev->struct_mutex);
return 0;
}
/**
* Setversion ioctl.
*
* \param inode device inode.
* \param file_priv DRM file private.
* \param cmd command.
* \param arg user argument, pointing to a drm_lock structure.
* \return zero on success or negative number on failure.
*
* Sets the requested interface version
*/
int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
struct drm_set_version *sv = data;
int if_version, retcode = 0;
if (sv->drm_di_major != -1) {
if (sv->drm_di_major != DRM_IF_MAJOR ||
sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) {
retcode = -EINVAL;
goto done;
}
if_version = DRM_IF_VERSION(sv->drm_di_major,
sv->drm_di_minor);
dev->if_version = max(if_version, dev->if_version);
if (sv->drm_di_minor >= 1) {
/*
* Version 1.1 includes tying of DRM to specific device
*/
drm_set_busid(dev, file_priv);
}
}
if (sv->drm_dd_major != -1) {
if (sv->drm_dd_major != dev->driver->major ||
sv->drm_dd_minor < 0 || sv->drm_dd_minor >
dev->driver->minor) {
retcode = -EINVAL;
goto done;
}
if (dev->driver->set_version)
dev->driver->set_version(dev, sv);
}
done:
sv->drm_di_major = DRM_IF_MAJOR;
sv->drm_di_minor = DRM_IF_MINOR;
sv->drm_dd_major = dev->driver->major;
sv->drm_dd_minor = dev->driver->minor;
return retcode;
}
/** No-op ioctl. */
int drm_noop(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
DRM_DEBUG("\n");
return 0;
}
