mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-19 10:53:58 +00:00
81dc97109d
Radeon IGP support (still lacking PCI IDs), and DRM interface 1.2 updates which include finally tying the DRM instances to specific devices rather than relying on the X Server.
118 lines
3.3 KiB
C
118 lines
3.3 KiB
C
/* drm_fops.h -- File operations for DRM -*- linux-c -*-
|
|
* Created: Mon Jan 4 08:58:31 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>
|
|
* Daryll Strauss <daryll@valinux.com>
|
|
* Gareth Hughes <gareth@valinux.com>
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include "dev/drm/drmP.h"
|
|
|
|
drm_file_t *DRM(find_file_by_proc)(drm_device_t *dev, DRM_STRUCTPROC *p)
|
|
{
|
|
#if __FreeBSD_version >= 500021
|
|
uid_t uid = p->td_ucred->cr_svuid;
|
|
pid_t pid = p->td_proc->p_pid;
|
|
#else
|
|
uid_t uid = p->p_cred->p_svuid;
|
|
pid_t pid = p->p_pid;
|
|
#endif
|
|
drm_file_t *priv;
|
|
|
|
DRM_SPINLOCK_ASSERT(&dev->dev_lock);
|
|
|
|
TAILQ_FOREACH(priv, &dev->files, link)
|
|
if (priv->pid == pid && priv->uid == uid)
|
|
return priv;
|
|
return NULL;
|
|
}
|
|
|
|
/* DRM(open_helper) is called whenever a process opens /dev/drm. */
|
|
int DRM(open_helper)(dev_t kdev, int flags, int fmt, DRM_STRUCTPROC *p,
|
|
drm_device_t *dev)
|
|
{
|
|
int m = minor(kdev);
|
|
drm_file_t *priv;
|
|
|
|
if (flags & O_EXCL)
|
|
return EBUSY; /* No exclusive opens */
|
|
dev->flags = flags;
|
|
|
|
DRM_DEBUG("pid = %d, minor = %d\n", DRM_CURRENTPID, m);
|
|
|
|
DRM_LOCK();
|
|
priv = DRM(find_file_by_proc)(dev, p);
|
|
if (priv) {
|
|
priv->refs++;
|
|
} else {
|
|
priv = (drm_file_t *) DRM(alloc)(sizeof(*priv), DRM_MEM_FILES);
|
|
if (priv == NULL) {
|
|
DRM_UNLOCK();
|
|
return DRM_ERR(ENOMEM);
|
|
}
|
|
bzero(priv, sizeof(*priv));
|
|
#if __FreeBSD_version >= 500000
|
|
priv->uid = p->td_ucred->cr_svuid;
|
|
priv->pid = p->td_proc->p_pid;
|
|
#else
|
|
priv->uid = p->p_cred->p_svuid;
|
|
priv->pid = p->p_pid;
|
|
#endif
|
|
|
|
priv->refs = 1;
|
|
priv->minor = m;
|
|
priv->devXX = dev;
|
|
priv->ioctl_count = 0;
|
|
priv->authenticated = !DRM_SUSER(p);
|
|
|
|
DRIVER_OPEN_HELPER( priv, dev );
|
|
|
|
TAILQ_INSERT_TAIL(&dev->files, priv, link);
|
|
}
|
|
DRM_UNLOCK();
|
|
#ifdef __FreeBSD__
|
|
kdev->si_drv1 = dev;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* The DRM(read) and DRM(poll) are stubs to prevent spurious errors
|
|
* on older X Servers (4.3.0 and earlier) */
|
|
|
|
int DRM(read)(dev_t kdev, struct uio *uio, int ioflag)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int DRM(poll)(dev_t kdev, int events, DRM_STRUCTPROC *p)
|
|
{
|
|
return 0;
|
|
}
|