aboutsummaryrefslogtreecommitdiff
path: root/bsd/drm/fops.c
diff options
context:
space:
mode:
Diffstat (limited to 'bsd/drm/fops.c')
-rw-r--r--bsd/drm/fops.c261
1 files changed, 0 insertions, 261 deletions
diff --git a/bsd/drm/fops.c b/bsd/drm/fops.c
deleted file mode 100644
index ad8c86a6..00000000
--- a/bsd/drm/fops.c
+++ /dev/null
@@ -1,261 +0,0 @@
-/* fops.c -- File operations for DRM -*- c -*-
- * Created: Mon Jan 4 08:58:31 1999 by faith@precisioninsight.com
- *
- * 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
- * PRECISION INSIGHT 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>
- *
- */
-
-#define __NO_VERSION__
-#include "drmP.h"
-#include <sys/signalvar.h>
-#include <sys/poll.h>
-
-drm_file_t *drm_find_file_by_proc(drm_device_t *dev, struct proc *p)
-{
- uid_t uid = p->p_cred->p_svuid;
- pid_t pid = p->p_pid;
- drm_file_t *priv;
-
- TAILQ_FOREACH(priv, &dev->files, link)
- if (priv->pid == pid && priv->uid == uid)
- return priv;
- return NULL;
-}
-
-
-/* drm_open is called whenever a process opens /dev/drm. */
-
-int drm_open_helper(dev_t kdev, int flags, int fmt, struct proc *p,
- drm_device_t *dev)
-{
- int m = minor(kdev);
- drm_file_t *priv;
-
- if (flags & O_EXCL)
- return EBUSY; /* No exclusive opens */
-
- dev->flags = flags;
-
- DRM_DEBUG("pid = %d, device = %p, minor = %d\n",
- p->p_pid, dev->device, m);
-
- priv = drm_find_file_by_proc(dev, p);
- if (priv) {
- priv->refs++;
- } else {
- priv = drm_alloc(sizeof(*priv), DRM_MEM_FILES);
- memset(priv, 0, sizeof(*priv));
- priv->uid = p->p_cred->p_svuid;
- priv->pid = p->p_pid;
- priv->refs = 1;
- priv->minor = m;
- priv->devXX = dev;
- priv->ioctl_count = 0;
- priv->authenticated = !suser(p);
- lockmgr(&dev->dev_lock, LK_EXCLUSIVE, 0, p);
- TAILQ_INSERT_TAIL(&dev->files, priv, link);
- lockmgr(&dev->dev_lock, LK_RELEASE, 0, p);
- }
-
- kdev->si_drv1 = dev;
-
- return 0;
-}
-
-int drm_write(dev_t kdev, struct uio *uio, int ioflag)
-{
- struct proc *p = curproc;
- drm_device_t *dev = kdev->si_drv1;
-
- DRM_DEBUG("pid = %d, device = %p, open_count = %d\n",
- p->p_pid, dev->device, dev->open_count);
- return 0;
-}
-
-/* drm_release is called whenever a process closes /dev/drm*. */
-
-int drm_close(dev_t kdev, int fflag, int devtype, struct proc *p)
-{
- drm_device_t *dev = kdev->si_drv1;
- drm_file_t *priv;
-
- DRM_DEBUG("pid = %d, device = %p, open_count = %d\n",
- p->p_pid, dev->device, dev->open_count);
-
- priv = drm_find_file_by_proc(dev, p);
- if (!priv) {
- DRM_DEBUG("can't find authenticator\n");
- return EINVAL;
- }
-
- if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
- && dev->lock.pid == p->p_pid) {
- DRM_ERROR("Process %d dead, freeing lock for context %d\n",
- p->p_pid,
- _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
- drm_lock_free(dev,
- &dev->lock.hw_lock->lock,
- _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
-
- /* FIXME: may require heavy-handed reset of
- hardware at this point, possibly
- processed via a callback to the X
- server. */
- }
- drm_reclaim_buffers(dev, priv->pid);
-
- funsetown(dev->buf_sigio);
-
- lockmgr(&dev->dev_lock, LK_EXCLUSIVE, 0, p);
- priv = drm_find_file_by_proc(dev, p);
- if (priv) {
- priv->refs--;
- if (!priv->refs) {
- TAILQ_REMOVE(&dev->files, priv, link);
- drm_free(priv, sizeof(*priv), DRM_MEM_FILES);
- }
- }
- lockmgr(&dev->dev_lock, LK_RELEASE, 0, p);
-
- return 0;
-}
-
-/* The drm_read and drm_write_string code (especially that which manages
- the circular buffer), is based on Alessandro Rubini's LINUX DEVICE
- DRIVERS (Cambridge: O'Reilly, 1998), pages 111-113. */
-
-ssize_t drm_read(dev_t kdev, struct uio *uio, int ioflag)
-{
- drm_device_t *dev = kdev->si_drv1;
- int left;
- int avail;
- int send;
- int cur;
- int error = 0;
-
- DRM_DEBUG("%p, %p\n", dev->buf_rp, dev->buf_wp);
-
- while (dev->buf_rp == dev->buf_wp) {
- DRM_DEBUG(" sleeping\n");
- if (dev->flags & FASYNC) {
- return EWOULDBLOCK;
- }
- error = tsleep(&dev->buf_rp, PZERO|PCATCH, "drmrd", 0);
- if (error) {
- DRM_DEBUG(" interrupted\n");
- return error;
- }
- DRM_DEBUG(" awake\n");
- }
-
- left = (dev->buf_rp + DRM_BSZ - dev->buf_wp) % DRM_BSZ;
- avail = DRM_BSZ - left;
- send = DRM_MIN(avail, uio->uio_resid);
-
- while (send) {
- if (dev->buf_wp > dev->buf_rp) {
- cur = DRM_MIN(send, dev->buf_wp - dev->buf_rp);
- } else {
- cur = DRM_MIN(send, dev->buf_end - dev->buf_rp);
- }
- error = uiomove(dev->buf_rp, cur, uio);
- if (error)
- break;
- dev->buf_rp += cur;
- if (dev->buf_rp == dev->buf_end) dev->buf_rp = dev->buf;
- send -= cur;
- }
-
- wakeup(&dev->buf_wp);
-
- return error;
-}
-
-int drm_write_string(drm_device_t *dev, const char *s)
-{
- int left = (dev->buf_rp + DRM_BSZ - dev->buf_wp) % DRM_BSZ;
- int send = strlen(s);
- int count;
-
- DRM_DEBUG("%d left, %d to send (%p, %p)\n",
- left, send, dev->buf_rp, dev->buf_wp);
-
- if (left == 1 || dev->buf_wp != dev->buf_rp) {
- DRM_ERROR("Buffer not empty (%d left, wp = %p, rp = %p)\n",
- left,
- dev->buf_wp,
- dev->buf_rp);
- }
-
- while (send) {
- if (dev->buf_wp >= dev->buf_rp) {
- count = DRM_MIN(send, dev->buf_end - dev->buf_wp);
- if (count == left) --count; /* Leave a hole */
- } else {
- count = DRM_MIN(send, dev->buf_rp - dev->buf_wp - 1);
- }
- strncpy(dev->buf_wp, s, count);
- dev->buf_wp += count;
- if (dev->buf_wp == dev->buf_end) dev->buf_wp = dev->buf;
- send -= count;
- }
-
- if (dev->buf_selecting) {
- dev->buf_selecting = 0;
- selwakeup(&dev->buf_sel);
- }
-
- DRM_DEBUG("dev->buf_sigio=%p\n", dev->buf_sigio);
- if (dev->buf_sigio) {
- DRM_DEBUG("dev->buf_sigio->sio_pgid=%d\n", dev->buf_sigio->sio_pgid);
- pgsigio(dev->buf_sigio, SIGIO, 0);
- }
-
- DRM_DEBUG("waking\n");
- wakeup(&dev->buf_rp);
- return 0;
-}
-
-int drm_poll(dev_t kdev, int events, struct proc *p)
-{
- drm_device_t *dev = kdev->si_drv1;
- int s;
- int revents = 0;
-
- s = spldrm();
- if (events & (POLLIN | POLLRDNORM)) {
- int left = (dev->buf_rp + DRM_BSZ - dev->buf_wp) % DRM_BSZ;
- if (left > 0)
- revents |= events & (POLLIN | POLLRDNORM);
- else
- selrecord(p, &dev->buf_sel);
- }
- splx(s);
-
- return revents;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-16 02:12:14 +0000