Current Path : /sys/dev/drm/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/dev/drm/drm_fops.c |
/*- * 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> * */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/dev/drm/drm_fops.c 196465 2009-08-23 14:31:20Z rnoland $"); /** @file drm_fops.c * Support code for dealing with the file privates associated with each * open of the DRM device. */ #include "dev/drm/drmP.h" /* drm_open_helper is called whenever a process opens /dev/drm. */ int drm_open_helper(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p, struct drm_device *dev) { struct drm_file *priv; int retcode; if (flags & O_EXCL) return EBUSY; /* No exclusive opens */ dev->flags = flags; DRM_DEBUG("pid = %d, device = %s\n", DRM_CURRENTPID, devtoname(kdev)); priv = malloc(sizeof(*priv), DRM_MEM_FILES, M_NOWAIT | M_ZERO); if (priv == NULL) { return ENOMEM; } retcode = devfs_set_cdevpriv(priv, drm_close); if (retcode != 0) { free(priv, DRM_MEM_FILES); return retcode; } DRM_LOCK(); priv->dev = dev; priv->uid = p->td_ucred->cr_svuid; priv->pid = p->td_proc->p_pid; priv->ioctl_count = 0; /* for compatibility root is always authenticated */ priv->authenticated = DRM_SUSER(p); if (dev->driver->open) { /* shared code returns -errno */ retcode = -dev->driver->open(dev, priv); if (retcode != 0) { devfs_clear_cdevpriv(); free(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); DRM_UNLOCK(); kdev->si_drv1 = dev; 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(struct cdev *kdev, struct uio *uio, int ioflag) { return 0; } int drm_poll(struct cdev *kdev, int events, DRM_STRUCTPROC *p) { return 0; }