1235783Skib/*- 2235783Skib * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 3235783Skib * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 4235783Skib * All Rights Reserved. 5235783Skib * 6235783Skib * Permission is hereby granted, free of charge, to any person obtaining a 7235783Skib * copy of this software and associated documentation files (the "Software"), 8235783Skib * to deal in the Software without restriction, including without limitation 9235783Skib * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10235783Skib * and/or sell copies of the Software, and to permit persons to whom the 11235783Skib * Software is furnished to do so, subject to the following conditions: 12235783Skib * 13235783Skib * The above copyright notice and this permission notice (including the next 14235783Skib * paragraph) shall be included in all copies or substantial portions of the 15235783Skib * Software. 16235783Skib * 17235783Skib * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18235783Skib * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19235783Skib * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20235783Skib * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 21235783Skib * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22235783Skib * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 23235783Skib * OTHER DEALINGS IN THE SOFTWARE. 24235783Skib * 25235783Skib * Authors: 26235783Skib * Rickard E. (Rik) Faith <faith@valinux.com> 27235783Skib * Daryll Strauss <daryll@valinux.com> 28235783Skib * Gareth Hughes <gareth@valinux.com> 29235783Skib * 30235783Skib */ 31235783Skib 32235783Skib#include <sys/cdefs.h> 33235783Skib__FBSDID("$FreeBSD$"); 34235783Skib 35235783Skib/** @file drm_fops.c 36235783Skib * Support code for dealing with the file privates associated with each 37235783Skib * open of the DRM device. 38235783Skib */ 39235783Skib 40235783Skib#include <dev/drm2/drmP.h> 41235783Skib 42235783Skib/* drm_open_helper is called whenever a process opens /dev/drm. */ 43235783Skibint drm_open_helper(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p, 44235783Skib struct drm_device *dev) 45235783Skib{ 46235783Skib struct drm_file *priv; 47235783Skib int retcode; 48235783Skib 49235783Skib if (flags & O_EXCL) 50235783Skib return EBUSY; /* No exclusive opens */ 51235783Skib dev->flags = flags; 52235783Skib 53235783Skib DRM_DEBUG("pid = %d, device = %s\n", DRM_CURRENTPID, devtoname(kdev)); 54235783Skib 55235783Skib priv = malloc(sizeof(*priv), DRM_MEM_FILES, M_NOWAIT | M_ZERO); 56235783Skib if (priv == NULL) { 57235783Skib return ENOMEM; 58235783Skib } 59235783Skib 60235783Skib DRM_LOCK(dev); 61235783Skib priv->dev = dev; 62235783Skib priv->uid = p->td_ucred->cr_svuid; 63235783Skib priv->pid = p->td_proc->p_pid; 64235783Skib priv->ioctl_count = 0; 65235783Skib 66235783Skib /* for compatibility root is always authenticated */ 67235783Skib priv->authenticated = DRM_SUSER(p); 68235783Skib 69235783Skib INIT_LIST_HEAD(&priv->fbs); 70235783Skib INIT_LIST_HEAD(&priv->event_list); 71235783Skib priv->event_space = 4096; /* set aside 4k for event buffer */ 72235783Skib 73235783Skib if (dev->driver->driver_features & DRIVER_GEM) 74235783Skib drm_gem_open(dev, priv); 75235783Skib 76235783Skib if (dev->driver->open) { 77235783Skib /* shared code returns -errno */ 78235783Skib retcode = -dev->driver->open(dev, priv); 79235783Skib if (retcode != 0) { 80235783Skib free(priv, DRM_MEM_FILES); 81235783Skib DRM_UNLOCK(dev); 82235783Skib return retcode; 83235783Skib } 84235783Skib } 85235783Skib 86235783Skib /* first opener automatically becomes master */ 87235783Skib priv->master = TAILQ_EMPTY(&dev->files); 88235783Skib 89235783Skib TAILQ_INSERT_TAIL(&dev->files, priv, link); 90235783Skib DRM_UNLOCK(dev); 91235783Skib kdev->si_drv1 = dev; 92241088Shselasky 93241088Shselasky retcode = devfs_set_cdevpriv(priv, drm_close); 94241088Shselasky if (retcode != 0) 95241088Shselasky drm_close(priv); 96241088Shselasky 97241088Shselasky return (retcode); 98235783Skib} 99235783Skib 100235783Skibstatic bool 101235783Skibdrm_dequeue_event(struct drm_device *dev, struct drm_file *file_priv, 102235783Skib struct uio *uio, struct drm_pending_event **out) 103235783Skib{ 104235783Skib struct drm_pending_event *e; 105235783Skib 106235783Skib if (list_empty(&file_priv->event_list)) 107235783Skib return (false); 108235783Skib e = list_first_entry(&file_priv->event_list, 109235783Skib struct drm_pending_event, link); 110235783Skib if (e->event->length > uio->uio_resid) 111235783Skib return (false); 112235783Skib 113235783Skib file_priv->event_space += e->event->length; 114235783Skib list_del(&e->link); 115235783Skib *out = e; 116235783Skib return (true); 117235783Skib} 118235783Skib 119235783Skibint 120235783Skibdrm_read(struct cdev *kdev, struct uio *uio, int ioflag) 121235783Skib{ 122235783Skib struct drm_file *file_priv; 123235783Skib struct drm_device *dev; 124235783Skib struct drm_pending_event *e; 125235783Skib int error; 126235783Skib 127235783Skib error = devfs_get_cdevpriv((void **)&file_priv); 128235783Skib if (error != 0) { 129235783Skib DRM_ERROR("can't find authenticator\n"); 130235783Skib return (EINVAL); 131235783Skib } 132235783Skib dev = drm_get_device_from_kdev(kdev); 133235783Skib mtx_lock(&dev->event_lock); 134235783Skib while (list_empty(&file_priv->event_list)) { 135235783Skib if ((ioflag & O_NONBLOCK) != 0) { 136235783Skib error = EAGAIN; 137235783Skib goto out; 138235783Skib } 139235783Skib error = msleep(&file_priv->event_space, &dev->event_lock, 140235783Skib PCATCH, "drmrea", 0); 141235783Skib if (error != 0) 142235783Skib goto out; 143235783Skib } 144235783Skib while (drm_dequeue_event(dev, file_priv, uio, &e)) { 145235783Skib mtx_unlock(&dev->event_lock); 146235783Skib error = uiomove(e->event, e->event->length, uio); 147235783Skib CTR3(KTR_DRM, "drm_event_dequeued %d %d %d", curproc->p_pid, 148235783Skib e->event->type, e->event->length); 149235783Skib e->destroy(e); 150235783Skib if (error != 0) 151235783Skib return (error); 152235783Skib mtx_lock(&dev->event_lock); 153235783Skib } 154235783Skibout: 155235783Skib mtx_unlock(&dev->event_lock); 156235783Skib return (error); 157235783Skib} 158235783Skib 159235783Skibvoid 160235783Skibdrm_event_wakeup(struct drm_pending_event *e) 161235783Skib{ 162235783Skib struct drm_file *file_priv; 163235783Skib struct drm_device *dev; 164235783Skib 165235783Skib file_priv = e->file_priv; 166235783Skib dev = file_priv->dev; 167235783Skib mtx_assert(&dev->event_lock, MA_OWNED); 168235783Skib 169235783Skib wakeup(&file_priv->event_space); 170235783Skib selwakeup(&file_priv->event_poll); 171235783Skib} 172235783Skib 173235783Skibint 174235783Skibdrm_poll(struct cdev *kdev, int events, struct thread *td) 175235783Skib{ 176235783Skib struct drm_file *file_priv; 177235783Skib struct drm_device *dev; 178235783Skib int error, revents; 179235783Skib 180235783Skib error = devfs_get_cdevpriv((void **)&file_priv); 181235783Skib if (error != 0) { 182235783Skib DRM_ERROR("can't find authenticator\n"); 183235783Skib return (EINVAL); 184235783Skib } 185235783Skib dev = drm_get_device_from_kdev(kdev); 186235783Skib 187235783Skib revents = 0; 188235783Skib mtx_lock(&dev->event_lock); 189235783Skib if ((events & (POLLIN | POLLRDNORM)) != 0) { 190235783Skib if (list_empty(&file_priv->event_list)) { 191235783Skib CTR0(KTR_DRM, "drm_poll empty list"); 192235783Skib selrecord(td, &file_priv->event_poll); 193235783Skib } else { 194235783Skib revents |= events & (POLLIN | POLLRDNORM); 195235783Skib CTR1(KTR_DRM, "drm_poll revents %x", revents); 196235783Skib } 197235783Skib } 198235783Skib mtx_unlock(&dev->event_lock); 199235783Skib return (revents); 200235783Skib} 201