drm/bsd-core/drm_ioctl.c

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/* drm_ioctl.h -- IOCTL processing for DRM -*- linux-c -*-
* 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.
*
* Authors:
* Rickard E. (Rik) Faith <faith@valinux.com>
* Gareth Hughes <gareth@valinux.com>
*
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*/
#include "drmP.h"
/*
* Beginning in revision 1.1 of the DRM interface, getunique will return
* a unique in the form pci:oooo:bb:dd.f (o=domain, b=bus, d=device, f=function)
* before setunique has been called. The format for the bus-specific part of
* the unique is not defined for any other bus.
*/
int drm_getunique(DRM_IOCTL_ARGS)
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{
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DRM_DEVICE;
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drm_unique_t u;
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DRM_COPY_FROM_USER_IOCTL( u, (drm_unique_t *)data, sizeof(u) );
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if (u.unique_len >= dev->unique_len) {
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if (DRM_COPY_TO_USER(u.unique, dev->unique, dev->unique_len))
return DRM_ERR(EFAULT);
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}
u.unique_len = dev->unique_len;
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DRM_COPY_TO_USER_IOCTL( (drm_unique_t *)data, u, sizeof(u) );
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return 0;
}
/* Deprecated in DRM version 1.1, and will return EBUSY when setversion has
* requested version 1.1 or greater.
*/
int drm_setunique(DRM_IOCTL_ARGS)
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{
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DRM_DEVICE;
drm_unique_t u;
int domain, bus, slot, func, ret;
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if (dev->unique_len || dev->unique)
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return DRM_ERR(EBUSY);
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DRM_COPY_FROM_USER_IOCTL( u, (drm_unique_t *)data, sizeof(u) );
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if (!u.unique_len || u.unique_len > 1024)
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return DRM_ERR(EINVAL);
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dev->unique_len = u.unique_len;
dev->unique = drm_alloc(u.unique_len + 1, DRM_MEM_DRIVER);
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if (dev->unique == NULL)
return DRM_ERR(ENOMEM);
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if (DRM_COPY_FROM_USER(dev->unique, u.unique, dev->unique_len))
return DRM_ERR(EFAULT);
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dev->unique[dev->unique_len] = '\0';
/* 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 != dev->pci_domain) ||
(bus != dev->pci_bus) ||
(slot != dev->pci_slot) ||
(func != dev->pci_func))
return DRM_ERR(EINVAL);
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return 0;
}
static int
drm_set_busid(drm_device_t *dev)
{
if (dev->unique != NULL)
return EBUSY;
dev->unique_len = 20;
dev->unique = drm_alloc(dev->unique_len + 1, DRM_MEM_DRIVER);
if (dev->unique == NULL)
return ENOMEM;
snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%1x",
dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func);
return 0;
}
int drm_getmap(DRM_IOCTL_ARGS)
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{
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DRM_DEVICE;
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drm_map_t map;
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drm_local_map_t *mapinlist;
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drm_map_list_entry_t *list;
int idx;
int i = 0;
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DRM_COPY_FROM_USER_IOCTL( map, (drm_map_t *)data, sizeof(map) );
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idx = map.offset;
DRM_LOCK();
if (idx < 0) {
DRM_UNLOCK();
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return DRM_ERR(EINVAL);
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}
TAILQ_FOREACH(list, dev->maplist, link) {
mapinlist = list->map;
if (i==idx) {
map.offset = mapinlist->offset;
map.size = mapinlist->size;
map.type = mapinlist->type;
map.flags = mapinlist->flags;
map.handle = mapinlist->handle;
map.mtrr = mapinlist->mtrr;
break;
}
i++;
}
DRM_UNLOCK();
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if (!list)
return EINVAL;
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DRM_COPY_TO_USER_IOCTL( (drm_map_t *)data, map, sizeof(map) );
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return 0;
}
int drm_getclient(DRM_IOCTL_ARGS)
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{
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DRM_DEVICE;
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drm_client_t client;
drm_file_t *pt;
int idx;
int i = 0;
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DRM_COPY_FROM_USER_IOCTL( client, (drm_client_t *)data, sizeof(client) );
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idx = client.idx;
DRM_LOCK();
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TAILQ_FOREACH(pt, &dev->files, link) {
if (i==idx)
{
client.auth = pt->authenticated;
client.pid = pt->pid;
client.uid = pt->uid;
client.magic = pt->magic;
client.iocs = pt->ioctl_count;
DRM_UNLOCK();
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*(drm_client_t *)data = client;
return 0;
}
i++;
}
DRM_UNLOCK();
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DRM_COPY_TO_USER_IOCTL( (drm_client_t *)data, client, sizeof(client) );
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return 0;
}
int drm_getstats(DRM_IOCTL_ARGS)
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{
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DRM_DEVICE;
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drm_stats_t stats;
int i;
memset(&stats, 0, sizeof(stats));
DRM_LOCK();
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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;
DRM_UNLOCK();
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DRM_COPY_TO_USER_IOCTL( (drm_stats_t *)data, stats, sizeof(stats) );
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return 0;
}
#define DRM_IF_MAJOR 1
#define DRM_IF_MINOR 2
int drm_setversion(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_set_version_t sv;
drm_set_version_t retv;
int if_version;
DRM_COPY_FROM_USER_IOCTL(sv, (drm_set_version_t *)data, sizeof(sv));
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;
DRM_COPY_TO_USER_IOCTL((drm_set_version_t *)data, retv, sizeof(sv));
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_dd_minor);
dev->if_version = DRM_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;
#ifdef DRIVER_SETVERSION
DRIVER_SETVERSION(dev, &sv);
#endif
}
return 0;
}
int drm_noop(DRM_IOCTL_ARGS)
{
DRM_DEBUG("\n");
return 0;
}