| | 1 | /* drm_fops.h -- File operations for DRM -*- linux-c -*- |
| | 2 | * Created: Mon Jan 4 08:58:31 1999 by faith@valinux.com |
| | 3 | * |
| | 4 | * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. |
| | 5 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. |
| | 6 | * All Rights Reserved. |
| | 7 | * |
| | 8 | * Permission is hereby granted, free of charge, to any person obtaining a |
| | 9 | * copy of this software and associated documentation files (the "Software"), |
| | 10 | * to deal in the Software without restriction, including without limitation |
| | 11 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| | 12 | * and/or sell copies of the Software, and to permit persons to whom the |
| | 13 | * Software is furnished to do so, subject to the following conditions: |
| | 14 | * |
| | 15 | * The above copyright notice and this permission notice (including the next |
| | 16 | * paragraph) shall be included in all copies or substantial portions of the |
| | 17 | * Software. |
| | 18 | * |
| | 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| | 20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| | 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| | 22 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| | 23 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| | 24 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| | 25 | * OTHER DEALINGS IN THE SOFTWARE. |
| | 26 | * |
| | 27 | * Authors: |
| | 28 | * Rickard E. (Rik) Faith <faith@valinux.com> |
| | 29 | * Daryll Strauss <daryll@valinux.com> |
| | 30 | * Gareth Hughes <gareth@valinux.com> |
| | 31 | * |
| | 32 | * $FreeBSD: src/sys/dev/drm/drm_fops.h,v 1.7.2.1 2003/04/26 07:05:28 anholt Exp $ |
| | 33 | * $DragonFly: src/sys/dev/drm/Attic/drm_fops.h,v 1.6 2006/09/10 01:26:34 dillon Exp $ |
| | 34 | */ |
| | 35 | |
| | 36 | #include "dev/drm/drmP.h" |
| | 37 | |
| | 38 | drm_file_t *DRM(find_file_by_proc)(drm_device_t *dev, DRM_STRUCTPROC *p) |
| | 39 | { |
| | 40 | #if defined(__FreeBSD__) && __FreeBSD_version >= 500021 |
| | 41 | uid_t uid = p->td_ucred->cr_svuid; |
| | 42 | pid_t pid = p->td_proc->p_pid; |
| | 43 | #else |
| | 44 | uid_t uid = p->td_proc->p_ucred->cr_svuid; |
| | 45 | pid_t pid = p->td_proc->p_pid; |
| | 46 | #endif |
| | 47 | drm_file_t *priv; |
| | 48 | |
| | 49 | TAILQ_FOREACH(priv, &dev->files, link) |
| | 50 | if (priv->pid == pid && priv->uid == uid) |
| | 51 | return priv; |
| | 52 | return NULL; |
| | 53 | } |
| | 54 | |
| | 55 | /* DRM(open) is called whenever a process opens /dev/drm. */ |
| | 56 | |
| | 57 | int DRM(open_helper)(cdev_t kdev, int flags, int fmt, DRM_STRUCTPROC *p, |
| | 58 | drm_device_t *dev) |
| | 59 | { |
| | 60 | int m = minor(kdev); |
| | 61 | drm_file_t *priv; |
| | 62 | |
| | 63 | if (flags & O_EXCL) |
| | 64 | return EBUSY; /* No exclusive opens */ |
| | 65 | dev->flags = flags; |
| | 66 | |
| | 67 | DRM_DEBUG("pid = %d, minor = %d\n", DRM_CURRENTPID, m); |
| | 68 | |
| | 69 | /* FIXME: linux mallocs and bzeros here */ |
| | 70 | priv = (drm_file_t *) DRM(find_file_by_proc)(dev, p); |
| | 71 | if (priv) { |
| | 72 | priv->refs++; |
| | 73 | } else { |
| | 74 | priv = (drm_file_t *) DRM(alloc)(sizeof(*priv), DRM_MEM_FILES); |
| | 75 | bzero(priv, sizeof(*priv)); |
| | 76 | #if defined(__FreeBSD__) && __FreeBSD_version >= 500000 |
| | 77 | priv->uid = p->td_ucred->cr_svuid; |
| | 78 | priv->pid = p->td_proc->p_pid; |
| | 79 | #else |
| | 80 | priv->uid = p->td_proc->p_ucred->cr_svuid; |
| | 81 | priv->pid = p->td_proc->p_pid; |
| | 82 | #endif |
| | 83 | |
| | 84 | priv->refs = 1; |
| | 85 | priv->minor = m; |
| | 86 | priv->devXX = dev; |
| | 87 | priv->ioctl_count = 0; |
| | 88 | priv->authenticated = !DRM_SUSER(p); |
| | 89 | DRM_LOCK; |
| | 90 | TAILQ_INSERT_TAIL(&dev->files, priv, link); |
| | 91 | DRM_UNLOCK; |
| | 92 | } |
| | 93 | #if defined(__DragonFly__) || defined(__FreeBSD__) |
| | 94 | kdev->si_drv1 = dev; |
| | 95 | #endif |
| | 96 | return 0; |
| | 97 | } |
| | 98 | |
| | 99 | |
| | 100 | /* The DRM(read) and DRM(poll) are stubs to prevent spurious errors |
| | 101 | * on older X Servers (4.3.0 and earlier) */ |
| | 102 | |
| | 103 | int DRM(read)(struct dev_read_args *ap) |
| | 104 | { |
| | 105 | return 0; |
| | 106 | } |
| | 107 | |
| | 108 | int DRM(poll)(struct dev_poll_args *ap) |
| | 109 | { |
| | 110 | ap->a_events = 0; |
| | 111 | return 0; |
| | 112 | } |
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