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-rw-r--r--linux-core/drm_fops.c497
1 files changed, 0 insertions, 497 deletions
diff --git a/linux-core/drm_fops.c b/linux-core/drm_fops.c
deleted file mode 100644
index 3e2691a8..00000000
--- a/linux-core/drm_fops.c
+++ /dev/null
@@ -1,497 +0,0 @@
-/**
- * \file drm_fops.c
- * File operations for DRM
- *
- * \author Rickard E. (Rik) Faith <faith@valinux.com>
- * \author Daryll Strauss <daryll@valinux.com>
- * \author Gareth Hughes <gareth@valinux.com>
- */
-
-/*
- * Created: Mon Jan 4 08:58:31 1999 by faith@valinux.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
- * VA LINUX SYSTEMS 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.
- */
-
-#include "drmP.h"
-#include "drm_sarea.h"
-#include <linux/poll.h>
-
-static int drm_open_helper(struct inode *inode, struct file *filp,
- struct drm_device * dev);
-
-static int drm_setup(struct drm_device * dev)
-{
- drm_local_map_t *map;
- int i;
- int ret;
- int sareapage;
-
- if (dev->driver->firstopen) {
- ret = dev->driver->firstopen(dev);
- if (ret != 0)
- return ret;
- }
-
- dev->magicfree.next = NULL;
-
- /* prebuild the SAREA */
- sareapage = max(SAREA_MAX, PAGE_SIZE);
- i = drm_addmap(dev, 0, sareapage, _DRM_SHM, _DRM_CONTAINS_LOCK, &map);
- if (i != 0)
- return i;
-
- atomic_set(&dev->ioctl_count, 0);
- atomic_set(&dev->vma_count, 0);
- dev->buf_use = 0;
- atomic_set(&dev->buf_alloc, 0);
-
- if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) {
- i = drm_dma_setup(dev);
- if (i < 0)
- return i;
- }
-
- for (i = 0; i < ARRAY_SIZE(dev->counts); i++)
- atomic_set(&dev->counts[i], 0);
-
- drm_ht_create(&dev->magiclist, DRM_MAGIC_HASH_ORDER);
- INIT_LIST_HEAD(&dev->magicfree);
-
- dev->sigdata.lock = NULL;
- init_waitqueue_head(&dev->lock.lock_queue);
- dev->queue_count = 0;
- dev->queue_reserved = 0;
- dev->queue_slots = 0;
- dev->queuelist = NULL;
- dev->context_flag = 0;
- dev->interrupt_flag = 0;
- dev->dma_flag = 0;
- dev->last_context = 0;
- dev->last_switch = 0;
- dev->last_checked = 0;
- init_waitqueue_head(&dev->context_wait);
- dev->if_version = 0;
-
- dev->ctx_start = 0;
- dev->lck_start = 0;
-
- dev->buf_async = NULL;
- init_waitqueue_head(&dev->buf_readers);
- init_waitqueue_head(&dev->buf_writers);
-
- DRM_DEBUG("\n");
-
- /*
- * The kernel's context could be created here, but is now created
- * in drm_dma_enqueue. This is more resource-efficient for
- * hardware that does not do DMA, but may mean that
- * drm_select_queue fails between the time the interrupt is
- * initialized and the time the queues are initialized.
- */
-
- return 0;
-}
-
-/**
- * Open file.
- *
- * \param inode device inode
- * \param filp file pointer.
- * \return zero on success or a negative number on failure.
- *
- * Searches the DRM device with the same minor number, calls open_helper(), and
- * increments the device open count. If the open count was previous at zero,
- * i.e., it's the first that the device is open, then calls setup().
- */
-int drm_open(struct inode *inode, struct file *filp)
-{
- struct drm_device *dev = NULL;
- int minor_id = iminor(inode);
- struct drm_minor *minor;
- int retcode = 0;
-
- minor = idr_find(&drm_minors_idr, minor_id);
- if (!minor)
- return -ENODEV;
-
- if (!(dev = minor->dev))
- return -ENODEV;
-
- retcode = drm_open_helper(inode, filp, dev);
- if (!retcode) {
- atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
- spin_lock(&dev->count_lock);
- if (!dev->open_count++) {
- spin_unlock(&dev->count_lock);
- retcode = drm_setup(dev);
- goto out;
- }
- spin_unlock(&dev->count_lock);
- }
-
-out:
- return retcode;
-}
-EXPORT_SYMBOL(drm_open);
-
-/**
- * File \c open operation.
- *
- * \param inode device inode.
- * \param filp file pointer.
- *
- * Puts the dev->fops corresponding to the device minor number into
- * \p filp, call the \c open method, and restore the file operations.
- */
-int drm_stub_open(struct inode *inode, struct file *filp)
-{
- struct drm_device *dev = NULL;
- struct drm_minor *minor;
- int minor_id = iminor(inode);
- int err = -ENODEV;
- const struct file_operations *old_fops;
-
- DRM_DEBUG("\n");
-
- minor = idr_find(&drm_minors_idr, minor_id);
- if (!minor)
- return -ENODEV;
-
- if (!(dev = minor->dev))
- return -ENODEV;
-
- old_fops = filp->f_op;
- filp->f_op = fops_get(&dev->driver->fops);
- if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) {
- fops_put(filp->f_op);
- filp->f_op = fops_get(old_fops);
- }
- fops_put(old_fops);
-
- return err;
-}
-
-/**
- * Check whether DRI will run on this CPU.
- *
- * \return non-zero if the DRI will run on this CPU, or zero otherwise.
- */
-static int drm_cpu_valid(void)
-{
-#if defined(__i386__)
- if (boot_cpu_data.x86 == 3)
- return 0; /* No cmpxchg on a 386 */
-#endif
-#if defined(__sparc__) && !defined(__sparc_v9__)
- return 0; /* No cmpxchg before v9 sparc. */
-#endif
- return 1;
-}
-
-/**
- * Called whenever a process opens /dev/drm.
- *
- * \param inode device inode.
- * \param filp file pointer.
- * \param dev device.
- * \return zero on success or a negative number on failure.
- *
- * Creates and initializes a drm_file structure for the file private data in \p
- * filp and add it into the double linked list in \p dev.
- */
-static int drm_open_helper(struct inode *inode, struct file *filp,
- struct drm_device * dev)
-{
- int minor_id = iminor(inode);
- struct drm_file *priv;
- int ret;
- int i, j;
-
- 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_id);
-
- priv = drm_alloc(sizeof(*priv), DRM_MEM_FILES);
- if (!priv)
- return -ENOMEM;
-
- memset(priv, 0, sizeof(*priv));
- filp->private_data = priv;
- priv->filp = filp;
- priv->uid = current_euid();
- priv->pid = current->pid;
- priv->minor = idr_find(&drm_minors_idr, minor_id);
- priv->ioctl_count = 0;
- /* for compatibility root is always authenticated */
- priv->authenticated = capable(CAP_SYS_ADMIN);
- priv->lock_count = 0;
-
- INIT_LIST_HEAD(&priv->lhead);
- INIT_LIST_HEAD(&priv->refd_objects);
-
- for (i = 0; i < _DRM_NO_REF_TYPES; ++i) {
- ret = drm_ht_create(&priv->refd_object_hash[i],
- DRM_FILE_HASH_ORDER);
- if (ret)
- break;
- }
-
- if (ret) {
- for (j = 0; j < i; ++j)
- drm_ht_remove(&priv->refd_object_hash[j]);
- goto out_free;
- }
-
- if (dev->driver->driver_features & DRIVER_GEM)
- drm_gem_open(dev, priv);
-
- if (dev->driver->open) {
- ret = dev->driver->open(dev, priv);
- if (ret < 0)
- goto out_free;
- }
-
- mutex_lock(&dev->struct_mutex);
- if (list_empty(&dev->filelist))
- priv->master = 1;
-
- list_add(&priv->lhead, &dev->filelist);
- mutex_unlock(&dev->struct_mutex);
-
-#ifdef __alpha__
- /*
- * Default the hose
- */
- if (!dev->hose) {
- struct pci_dev *pci_dev;
- pci_dev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, NULL);
- if (pci_dev) {
- dev->hose = pci_dev->sysdata;
- pci_dev_put(pci_dev);
- }
- if (!dev->hose) {
- struct pci_bus *b = pci_bus_b(pci_root_buses.next);
- if (b)
- dev->hose = b->sysdata;
- }
- }
-#endif
-
- return 0;
- out_free:
- drm_free(priv, sizeof(*priv), DRM_MEM_FILES);
- filp->private_data = NULL;
- return ret;
-}
-
-/** No-op. */
-int drm_fasync(int fd, struct file *filp, int on)
-{
- struct drm_file *priv = filp->private_data;
- struct drm_device *dev = priv->minor->dev;
- int retcode;
-
- DRM_DEBUG("fd = %d, device = 0x%lx\n", fd,
- (long)old_encode_dev(priv->minor->device));
- retcode = fasync_helper(fd, filp, on, &dev->buf_async);
- if (retcode < 0)
- return retcode;
- return 0;
-}
-EXPORT_SYMBOL(drm_fasync);
-
-/**
- * Release file.
- *
- * \param inode device inode
- * \param file_priv DRM file private.
- * \return zero on success or a negative number on failure.
- *
- * If the hardware lock is held then free it, and take it again for the kernel
- * context since it's necessary to reclaim buffers. Unlink the file private
- * data from its list and free it. Decreases the open count and if it reaches
- * zero calls drm_lastclose().
- */
-int drm_release(struct inode *inode, struct file *filp)
-{
- struct drm_file *file_priv = filp->private_data;
- struct drm_device *dev = file_priv->minor->dev;
- int retcode = 0;
-
- lock_kernel();
-
- DRM_DEBUG("open_count = %d\n", dev->open_count);
-
- if (dev->driver->preclose)
- dev->driver->preclose(dev, file_priv);
-
- /* ========================================================
- * Begin inline drm_release
- */
-
- DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
- current->pid, (long)old_encode_dev(file_priv->minor->device),
- dev->open_count);
-
- if (dev->driver->reclaim_buffers_locked && dev->lock.hw_lock) {
- if (drm_i_have_hw_lock(dev, file_priv)) {
- dev->driver->reclaim_buffers_locked(dev, file_priv);
- } else {
- unsigned long _end=jiffies + 3*DRM_HZ;
- int locked = 0;
-
- drm_idlelock_take(&dev->lock);
-
- /*
- * Wait for a while.
- */
-
- do{
- spin_lock_bh(&dev->lock.spinlock);
- locked = dev->lock.idle_has_lock;
- spin_unlock_bh(&dev->lock.spinlock);
- if (locked)
- break;
- schedule();
- } while (!time_after_eq(jiffies, _end));
-
- if (!locked) {
- DRM_ERROR("reclaim_buffers_locked() deadlock. Please rework this\n"
- "\tdriver to use reclaim_buffers_idlelocked() instead.\n"
- "\tI will go on reclaiming the buffers anyway.\n");
- }
-
- dev->driver->reclaim_buffers_locked(dev, file_priv);
- drm_idlelock_release(&dev->lock);
- }
- }
-
- if (dev->driver->reclaim_buffers_idlelocked && dev->lock.hw_lock) {
-
- drm_idlelock_take(&dev->lock);
- dev->driver->reclaim_buffers_idlelocked(dev, file_priv);
- drm_idlelock_release(&dev->lock);
-
- }
-
- if (drm_i_have_hw_lock(dev, file_priv)) {
- DRM_DEBUG("File %p released, freeing lock for context %d\n",
- filp, _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
-
- drm_lock_free(&dev->lock,
- _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
- }
-
-
- if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
- !dev->driver->reclaim_buffers_locked) {
- dev->driver->reclaim_buffers(dev, file_priv);
- }
-
- if (dev->driver->driver_features & DRIVER_GEM)
- drm_gem_release(dev, file_priv);
-
- drm_fasync(-1, filp, 0);
-
- mutex_lock(&dev->ctxlist_mutex);
-
- if (!list_empty(&dev->ctxlist)) {
- struct drm_ctx_list *pos, *n;
-
- list_for_each_entry_safe(pos, n, &dev->ctxlist, head) {
- if (pos->tag == file_priv &&
- pos->handle != DRM_KERNEL_CONTEXT) {
- if (dev->driver->context_dtor)
- dev->driver->context_dtor(dev,
- pos->handle);
-
- drm_ctxbitmap_free(dev, pos->handle);
-
- list_del(&pos->head);
- drm_free(pos, sizeof(*pos), DRM_MEM_CTXLIST);
- --dev->ctx_count;
- }
- }
- }
- mutex_unlock(&dev->ctxlist_mutex);
-
- mutex_lock(&dev->struct_mutex);
- if (file_priv->remove_auth_on_close == 1) {
- struct drm_file *temp;
-
- list_for_each_entry(temp, &dev->filelist, lhead)
- temp->authenticated = 0;
- }
- list_del(&file_priv->lhead);
- mutex_unlock(&dev->struct_mutex);
-
- if (dev->driver->postclose)
- dev->driver->postclose(dev, file_priv);
- drm_free(file_priv, sizeof(*file_priv), DRM_MEM_FILES);
-
- /* ========================================================
- * End inline drm_release
- */
-
- atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
- spin_lock(&dev->count_lock);
- if (!--dev->open_count) {
- if (atomic_read(&dev->ioctl_count) || dev->blocked) {
- DRM_ERROR("Device busy: %d %d\n",
- atomic_read(&dev->ioctl_count), dev->blocked);
- spin_unlock(&dev->count_lock);
- unlock_kernel();
- return -EBUSY;
- }
- spin_unlock(&dev->count_lock);
- unlock_kernel();
- return drm_lastclose(dev);
- }
- spin_unlock(&dev->count_lock);
-
- unlock_kernel();
-
- return retcode;
-}
-EXPORT_SYMBOL(drm_release);
-
-/** No-op. */
-/* This is to deal with older X servers that believe 0 means data is
- * available which is not the correct return for a poll function.
- * This cannot be fixed until the Xserver is fixed. Xserver will need
- * to set a newer interface version to avoid breaking older Xservers.
- * Without fixing the Xserver you get: "WaitForSomething(): select: errno=22"
- * http://freedesktop.org/bugzilla/show_bug.cgi?id=1505 if you try
- * to return the correct response.
- */
-unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait)
-{
- /* return (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM); */
- return 0;
-}
-EXPORT_SYMBOL(drm_poll);
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