tmp_suning_uos_patched/drivers/char/drm/drm_ioctl.c
Dave Airlie 332296016e drm: remove the DRM pci domain
This patch removes the pci_domain from the DRM device structure, and
gets it via a macro that either asks the platform or does the alpha special
case. jgarzik asked for this to just use the platform magic, but I've no
alpha experience and I'd rather not just break it and wait for someone to
give out.

Signed-off-by: Dave Airlie <airlied@linux.ie>
2006-09-22 05:32:30 +10:00

381 lines
9.9 KiB
C

/**
* \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 filp file pointer.
* \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 inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->head->dev;
drm_unique_t __user *argp = (void __user *)arg;
drm_unique_t u;
if (copy_from_user(&u, argp, sizeof(u)))
return -EFAULT;
if (u.unique_len >= dev->unique_len) {
if (copy_to_user(u.unique, dev->unique, dev->unique_len))
return -EFAULT;
}
u.unique_len = dev->unique_len;
if (copy_to_user(argp, &u, sizeof(u)))
return -EFAULT;
return 0;
}
/**
* Set the bus id.
*
* \param inode device inode.
* \param filp file pointer.
* \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 inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->head->dev;
drm_unique_t u;
int domain, bus, slot, func, ret;
if (dev->unique_len || dev->unique)
return -EBUSY;
if (copy_from_user(&u, (drm_unique_t __user *) arg, sizeof(u)))
return -EFAULT;
if (!u.unique_len || u.unique_len > 1024)
return -EINVAL;
dev->unique_len = u.unique_len;
dev->unique = drm_alloc(u.unique_len + 1, DRM_MEM_DRIVER);
if (!dev->unique)
return -ENOMEM;
if (copy_from_user(dev->unique, u.unique, dev->unique_len))
return -EFAULT;
dev->unique[dev->unique_len] = '\0';
dev->devname =
drm_alloc(strlen(dev->driver->pci_driver.name) +
strlen(dev->unique) + 2, DRM_MEM_DRIVER);
if (!dev->devname)
return -ENOMEM;
sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
dev->unique);
/* Return error if the busid submitted doesn't match the device's actual
* busid.
*/
ret = sscanf(dev->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
if (ret != 3)
return DRM_ERR(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(drm_device_t * dev)
{
int len;
if (dev->unique != NULL)
return EBUSY;
dev->unique_len = 40;
dev->unique = drm_alloc(dev->unique_len + 1, DRM_MEM_DRIVER);
if (dev->unique == NULL)
return ENOMEM;
len = snprintf(dev->unique, dev->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 > dev->unique_len)
DRM_ERROR("Unique buffer overflowed\n");
dev->devname =
drm_alloc(strlen(dev->driver->pci_driver.name) + dev->unique_len +
2, DRM_MEM_DRIVER);
if (dev->devname == NULL)
return ENOMEM;
sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
dev->unique);
return 0;
}
/**
* Get a mapping information.
*
* \param inode device inode.
* \param filp file pointer.
* \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 inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->head->dev;
drm_map_t __user *argp = (void __user *)arg;
drm_map_t map;
drm_map_list_t *r_list = NULL;
struct list_head *list;
int idx;
int i;
if (copy_from_user(&map, argp, sizeof(map)))
return -EFAULT;
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->head) {
if (i == idx) {
r_list = list_entry(list, drm_map_list_t, 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);
if (copy_to_user(argp, &map, sizeof(map)))
return -EFAULT;
return 0;
}
/**
* Get client information.
*
* \param inode device inode.
* \param filp file pointer.
* \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 inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->head->dev;
drm_client_t __user *argp = (drm_client_t __user *)arg;
drm_client_t client;
drm_file_t *pt;
int idx;
int i;
if (copy_from_user(&client, argp, sizeof(client)))
return -EFAULT;
idx = client.idx;
mutex_lock(&dev->struct_mutex);
for (i = 0, pt = dev->file_first; i < idx && pt; i++, pt = pt->next) ;
if (!pt) {
mutex_unlock(&dev->struct_mutex);
return -EINVAL;
}
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);
if (copy_to_user(argp, &client, sizeof(client)))
return -EFAULT;
return 0;
}
/**
* Get statistics information.
*
* \param inode device inode.
* \param filp file pointer.
* \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 inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->head->dev;
drm_stats_t stats;
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
= (dev->lock.hw_lock ? dev->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);
if (copy_to_user((drm_stats_t __user *) arg, &stats, sizeof(stats)))
return -EFAULT;
return 0;
}
/**
* Setversion ioctl.
*
* \param inode device inode.
* \param filp file pointer.
* \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(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_set_version_t sv;
drm_set_version_t retv;
int if_version;
drm_set_version_t __user *argp = (void __user *)data;
if (copy_from_user(&sv, argp, sizeof(sv)))
return -EFAULT;
retv.drm_di_major = DRM_IF_MAJOR;
retv.drm_di_minor = DRM_IF_MINOR;
retv.drm_dd_major = dev->driver->major;
retv.drm_dd_minor = dev->driver->minor;
if (copy_to_user(argp, &retv, sizeof(sv)))
return -EFAULT;
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)
return EINVAL;
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);
}
}
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)
return EINVAL;
if (dev->driver->set_version)
dev->driver->set_version(dev, &sv);
}
return 0;
}
/** No-op ioctl. */
int drm_noop(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
DRM_DEBUG("\n");
return 0;
}