1/*- 2 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 3 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 23 * OTHER DEALINGS IN THE SOFTWARE. 24 * 25 * Authors: 26 * Rickard E. (Rik) Faith <faith@valinux.com> 27 * Daryll Strauss <daryll@valinux.com> 28 * Gareth Hughes <gareth@valinux.com> 29 * 30 */ 31 32#include <sys/cdefs.h> 33__FBSDID("$FreeBSD: releng/10.2/sys/dev/drm/drm_fops.c 239303 2012-08-15 16:19:39Z hselasky $"); 34 35/** @file drm_fops.c 36 * Support code for dealing with the file privates associated with each 37 * open of the DRM device. 38 */ 39 40#include "dev/drm/drmP.h" 41 42/* drm_open_helper is called whenever a process opens /dev/drm. */ 43int drm_open_helper(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p, 44 struct drm_device *dev) 45{ 46 struct drm_file *priv; 47 int retcode; 48 49 if (flags & O_EXCL) 50 return EBUSY; /* No exclusive opens */ 51 dev->flags = flags; 52 53 DRM_DEBUG("pid = %d, device = %s\n", DRM_CURRENTPID, devtoname(kdev)); 54 55 priv = malloc(sizeof(*priv), DRM_MEM_FILES, M_NOWAIT | M_ZERO); 56 if (priv == NULL) { 57 return ENOMEM; 58 } 59 60 DRM_LOCK(); 61 priv->dev = dev; 62 priv->uid = p->td_ucred->cr_svuid; 63 priv->pid = p->td_proc->p_pid; 64 priv->ioctl_count = 0; 65 66 /* for compatibility root is always authenticated */ 67 priv->authenticated = DRM_SUSER(p); 68 69 if (dev->driver->open) { 70 /* shared code returns -errno */ 71 retcode = -dev->driver->open(dev, priv); 72 if (retcode != 0) { 73 free(priv, DRM_MEM_FILES); 74 DRM_UNLOCK(); 75 return retcode; 76 } 77 } 78 79 /* first opener automatically becomes master */ 80 priv->master = TAILQ_EMPTY(&dev->files); 81 82 TAILQ_INSERT_TAIL(&dev->files, priv, link); 83 DRM_UNLOCK(); 84 kdev->si_drv1 = dev; 85 86 retcode = devfs_set_cdevpriv(priv, drm_close); 87 if (retcode != 0) 88 drm_close(priv); 89 90 return (retcode); 91} 92 93 94/* The drm_read and drm_poll are stubs to prevent spurious errors 95 * on older X Servers (4.3.0 and earlier) */ 96 97int drm_read(struct cdev *kdev, struct uio *uio, int ioflag) 98{ 99 return 0; 100} 101 102int drm_poll(struct cdev *kdev, int events, DRM_STRUCTPROC *p) 103{ 104 return 0; 105} 106