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/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* BEGIN CSTYLED */
/* 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.
* Copyright (c) 2009, Intel Corporation.
* 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>
*
*/
/* END CSTYLED */
#include "drmP.h"
/*ARGSUSED*/
drm_file_t *
drm_find_file_by_proc(drm_device_t *dev, cred_t *credp)
{
pid_t pid = ddi_get_pid();
drm_file_t *priv;
TAILQ_FOREACH(priv, &dev->files, link)
if (priv->pid == pid)
return (priv);
return (NULL);
}
drm_cminor_t *
drm_find_file_by_minor(drm_device_t *dev, int minor)
{
drm_cminor_t *mp;
TAILQ_FOREACH(mp, &dev->minordevs, link) {
if (mp->minor == minor)
return (mp);
}
return (NULL);
}
/* drm_open_helper is called whenever a process opens /dev/drm. */
/*ARGSUSED*/
int
drm_open_helper(drm_device_t *dev, drm_cminor_t *mp, int flags,
int otyp, cred_t *credp)
{
drm_file_t *priv;
pid_t pid;
int retcode;
if (flags & FEXCL)
return (EBUSY); /* No exclusive opens */
dev->flags = flags;
pid = ddi_get_pid();
DRM_DEBUG("drm_open_helper :pid = %d", pid);
DRM_LOCK();
priv = drm_find_file_by_proc(dev, credp);
if (priv) {
priv->refs++;
} else {
priv = drm_alloc(sizeof (*priv), DRM_MEM_FILES);
if (priv == NULL) {
DRM_UNLOCK();
return (ENOMEM);
}
bzero(priv, sizeof (*priv));
priv->uid = crgetsuid(credp);
priv->pid = pid;
priv->refs = 1;
priv->minor = 5; /* just for hack */
priv->ioctl_count = 0;
/* for compatibility root is always authenticated */
priv->authenticated = DRM_SUSER(credp);
if (dev->driver->use_gem == 1)
drm_gem_open(priv);
if (dev->driver->open) {
retcode = dev->driver->open(dev, priv);
if (retcode != 0) {
drm_free(priv, sizeof (*priv), DRM_MEM_FILES);
DRM_UNLOCK();
return (retcode);
}
}
/* first opener automatically becomes master */
priv->master = TAILQ_EMPTY(&dev->files);
TAILQ_INSERT_TAIL(&dev->files, priv, link);
}
mp->fpriv = priv;
DRM_UNLOCK();
return (0);
}