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authorGareth Hughes <gareth@users.sourceforge.net>2001-02-15 08:12:14 +0000
committerGareth Hughes <gareth@users.sourceforge.net>2001-02-15 08:12:14 +0000
commit360475376c5a597caf4a981c934a6b0d783fa94d (patch)
tree433f6970813deb74a2c8e1636b772a1f8567b267 /linux/fops.c
parent38c22bc4883ac201bde7f5f130a72acd1be68ec5 (diff)
Merge mga-1-0-0-branch into trunk.
Diffstat (limited to 'linux/fops.c')
-rw-r--r--linux/fops.c250
1 files changed, 0 insertions, 250 deletions
diff --git a/linux/fops.c b/linux/fops.c
deleted file mode 100644
index 8e373e5a..00000000
--- a/linux/fops.c
+++ /dev/null
@@ -1,250 +0,0 @@
-/* fops.c -- File operations for DRM -*- linux-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 <linux/poll.h>
-
-/* drm_open is called whenever a process opens /dev/drm. */
-
-int drm_open_helper(struct inode *inode, struct file *filp, drm_device_t *dev)
-{
- kdev_t minor = MINOR(inode->i_rdev);
- drm_file_t *priv;
-
- if (filp->f_flags & O_EXCL) return -EBUSY; /* No exclusive opens */
- if (!drm_cpu_valid()) return -EINVAL;
-
- DRM_DEBUG("pid = %d, minor = %d\n", current->pid, minor);
-
- priv = drm_alloc(sizeof(*priv), DRM_MEM_FILES);
- memset(priv, 0, sizeof(*priv));
- filp->private_data = priv;
- priv->uid = current->euid;
- priv->pid = current->pid;
- priv->minor = minor;
- priv->dev = dev;
- priv->ioctl_count = 0;
- priv->authenticated = capable(CAP_SYS_ADMIN);
-
- down(&dev->struct_sem);
- if (!dev->file_last) {
- priv->next = NULL;
- priv->prev = NULL;
- dev->file_first = priv;
- dev->file_last = priv;
- } else {
- priv->next = NULL;
- priv->prev = dev->file_last;
- dev->file_last->next = priv;
- dev->file_last = priv;
- }
- up(&dev->struct_sem);
-
- return 0;
-}
-
-int drm_flush(struct file *filp)
-{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->dev;
-
- DRM_DEBUG("pid = %d, device = 0x%x, open_count = %d\n",
- current->pid, dev->device, dev->open_count);
- return 0;
-}
-
-/* drm_release is called whenever a process closes /dev/drm*. Linux calls
- this only if any mappings have been closed. */
-
-int drm_release(struct inode *inode, struct file *filp)
-{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->dev;
-
- DRM_DEBUG("pid = %d, device = 0x%x, open_count = %d\n",
- current->pid, dev->device, dev->open_count);
-
- if (dev->lock.hw_lock
- && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
- && dev->lock.pid == current->pid) {
- DRM_ERROR("Process %d dead, freeing lock for context %d\n",
- current->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);
-
- drm_fasync(-1, filp, 0);
-
- down(&dev->struct_sem);
- if (priv->prev) priv->prev->next = priv->next;
- else dev->file_first = priv->next;
- if (priv->next) priv->next->prev = priv->prev;
- else dev->file_last = priv->prev;
- up(&dev->struct_sem);
-
- drm_free(priv, sizeof(*priv), DRM_MEM_FILES);
-
- return 0;
-}
-
-int drm_fasync(int fd, struct file *filp, int on)
-{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->dev;
- int retcode;
-
- DRM_DEBUG("fd = %d, device = 0x%x\n", fd, dev->device);
- retcode = fasync_helper(fd, filp, on, &dev->buf_async);
- if (retcode < 0) return retcode;
- 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(struct file *filp, char *buf, size_t count, loff_t *off)
-{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->dev;
- int left;
- int avail;
- int send;
- int cur;
-
- DRM_DEBUG("%p, %p\n", dev->buf_rp, dev->buf_wp);
-
- while (dev->buf_rp == dev->buf_wp) {
- DRM_DEBUG(" sleeping\n");
- if (filp->f_flags & O_NONBLOCK) {
- return -EAGAIN;
- }
- interruptible_sleep_on(&dev->buf_readers);
- if (signal_pending(current)) {
- DRM_DEBUG(" interrupted\n");
- return -ERESTARTSYS;
- }
- DRM_DEBUG(" awake\n");
- }
-
- left = (dev->buf_rp + DRM_BSZ - dev->buf_wp) % DRM_BSZ;
- avail = DRM_BSZ - left;
- send = DRM_MIN(avail, count);
-
- 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);
- }
- if (copy_to_user(buf, dev->buf_rp, cur))
- return -EFAULT;
- dev->buf_rp += cur;
- if (dev->buf_rp == dev->buf_end) dev->buf_rp = dev->buf;
- send -= cur;
- }
-
- wake_up_interruptible(&dev->buf_writers);
- return DRM_MIN(avail, count);;
-}
-
-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 LINUX_VERSION_CODE < 0x020315 && !defined(KILLFASYNCHASTHREEPARAMETERS)
- /* The extra parameter to kill_fasync was added in 2.3.21, and is
- _not_ present in _stock_ 2.2.14 and 2.2.15. However, some
- distributions patch 2.2.x kernels to add this parameter. The
- Makefile.linux attempts to detect this addition and defines
- KILLFASYNCHASTHREEPARAMETERS if three parameters are found. */
- if (dev->buf_async) kill_fasync(dev->buf_async, SIGIO);
-#else
-
- /* Parameter added in 2.3.21. */
-#if LINUX_VERSION_CODE < 0x020400
- if (dev->buf_async) kill_fasync(dev->buf_async, SIGIO, POLL_IN);
-#else
- /* Type of first parameter changed in
- Linux 2.4.0-test2... */
- if (dev->buf_async) kill_fasync(&dev->buf_async, SIGIO, POLL_IN);
-#endif
-#endif
- DRM_DEBUG("waking\n");
- wake_up_interruptible(&dev->buf_readers);
- return 0;
-}
-
-unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait)
-{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->dev;
-
- poll_wait(filp, &dev->buf_readers, wait);
- if (dev->buf_wp != dev->buf_rp) return POLLIN | POLLRDNORM;
- return 0;
-}