mirror of
https://gitlab.freedesktop.org/mesa/drm.git
synced 2025-12-20 19:50:12 +01:00
c789ea1521
understandable: preinit -> load postinit -> (removed) presetup ->
firstopen postsetup -> (removed) open_helper -> open prerelease ->
preclose free_filp_priv -> postclose pretakedown -> lastclose
postcleanup -> unload release -> reclaim_buffers_locked version ->
(removed)
postinit and version were replaced with generic code in the Linux DRM
(drivers now set their version numbers and description in the driver
structure, like on BSD). postsetup wasn't used at all. Fixes the savage
hooks for initializing and tearing down mappings at the right times.
Testing involved at least starting X, running glxgears, killing
glxgears, exiting X, and repeating.
Tested on: FreeBSD (g200, g400, r200, r128) Linux (r200, savage4)
123 lines
3.3 KiB
C
123 lines
3.3 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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/*-
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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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*/
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#include "drmP.h"
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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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DRM_SPINLOCK_ASSERT(&dev->dev_lock);
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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(struct cdev *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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int retcode;
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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_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 = malloc(sizeof(*priv), M_DRM, M_NOWAIT | M_ZERO);
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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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#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->ioctl_count = 0;
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priv->authenticated = !DRM_SUSER(p);
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if (dev->driver.open) {
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retcode = dev->driver.open(dev, priv);
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if (retcode != 0) {
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free(priv, M_DRM);
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DRM_UNLOCK();
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return retcode;
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}
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}
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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(struct cdev *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(struct cdev *kdev, int events, DRM_STRUCTPROC *p)
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{
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return 0;
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}
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