1d0d7f3ee4
locking, and the apparently unnecessary locking for -stable has been removed. This may fix issues with missed interrupts since April, which manifested themselves as slowdowns or hangs in radeon, in particular. Many cleanups also took place. In the shared code, there are improvements to r128 driver stability.
114 lines
3.2 KiB
C
114 lines
3.2 KiB
C
/* drm_fops.h -- File operations for DRM -*- linux-c -*-
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* Created: Mon Jan 4 08:58:31 1999 by faith@valinux.com
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*
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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Rickard E. (Rik) Faith <faith@valinux.com>
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* Daryll Strauss <daryll@valinux.com>
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* Gareth Hughes <gareth@valinux.com>
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*
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* $FreeBSD$
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*/
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#include "dev/drm/drmP.h"
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/* Requires device lock held */
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drm_file_t *DRM(find_file_by_proc)(drm_device_t *dev, DRM_STRUCTPROC *p)
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{
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#if __FreeBSD_version >= 500021
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uid_t uid = p->td_ucred->cr_svuid;
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pid_t pid = p->td_proc->p_pid;
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#else
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uid_t uid = p->p_cred->p_svuid;
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pid_t pid = p->p_pid;
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#endif
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drm_file_t *priv;
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TAILQ_FOREACH(priv, &dev->files, link)
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if (priv->pid == pid && priv->uid == uid)
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return priv;
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return NULL;
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}
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/* DRM(open_helper) is called whenever a process opens /dev/drm. */
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int DRM(open_helper)(dev_t kdev, int flags, int fmt, DRM_STRUCTPROC *p,
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drm_device_t *dev)
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{
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int m = minor(kdev);
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drm_file_t *priv;
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if (flags & O_EXCL)
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return EBUSY; /* No exclusive opens */
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dev->flags = flags;
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DRM_DEBUG("pid = %d, minor = %d\n", DRM_CURRENTPID, m);
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DRM_LOCK();
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priv = (drm_file_t *) DRM(find_file_by_proc)(dev, p);
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if (priv) {
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priv->refs++;
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} else {
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priv = (drm_file_t *) DRM(alloc)(sizeof(*priv), DRM_MEM_FILES);
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if (priv == NULL) {
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DRM_UNLOCK();
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return DRM_ERR(ENOMEM);
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}
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bzero(priv, sizeof(*priv));
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#if __FreeBSD_version >= 500000
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priv->uid = p->td_ucred->cr_svuid;
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priv->pid = p->td_proc->p_pid;
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#else
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priv->uid = p->p_cred->p_svuid;
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priv->pid = p->p_pid;
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#endif
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priv->refs = 1;
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priv->minor = m;
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priv->devXX = dev;
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priv->ioctl_count = 0;
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priv->authenticated = !DRM_SUSER(p);
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TAILQ_INSERT_TAIL(&dev->files, priv, link);
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}
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DRM_UNLOCK();
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#ifdef __FreeBSD__
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kdev->si_drv1 = dev;
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#endif
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return 0;
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}
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/* The DRM(read) and DRM(poll) are stubs to prevent spurious errors
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* on older X Servers (4.3.0 and earlier) */
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int DRM(read)(dev_t kdev, struct uio *uio, int ioflag)
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{
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return 0;
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}
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int DRM(poll)(dev_t kdev, int events, DRM_STRUCTPROC *p)
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{
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return 0;
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}
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