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Diffstat (limited to 'linux-core/drm_fops.c')
-rw-r--r--linux-core/drm_fops.c147
1 files changed, 103 insertions, 44 deletions
diff --git a/linux-core/drm_fops.c b/linux-core/drm_fops.c
index 48c77545..b60ced34 100644
--- a/linux-core/drm_fops.c
+++ b/linux-core/drm_fops.c
@@ -47,6 +47,7 @@ static int drm_setup(drm_device_t * dev)
int i;
int ret;
+
if (dev->driver->firstopen) {
ret = dev->driver->firstopen(dev);
if (ret != 0)
@@ -56,6 +57,7 @@ static int drm_setup(drm_device_t * dev)
dev->magicfree.next = NULL;
/* prebuild the SAREA */
+
i = drm_addmap(dev, 0, SAREA_MAX, _DRM_SHM, _DRM_CONTAINS_LOCK, &map);
if (i != 0)
return i;
@@ -156,6 +158,12 @@ int drm_open(struct inode *inode, struct file *filp)
}
spin_unlock(&dev->count_lock);
}
+ mutex_lock(&dev->struct_mutex);
+ BUG_ON((dev->dev_mapping != NULL) &&
+ (dev->dev_mapping != inode->i_mapping));
+ if (dev->dev_mapping == NULL)
+ dev->dev_mapping = inode->i_mapping;
+ mutex_unlock(&dev->struct_mutex);
return retcode;
}
@@ -233,6 +241,7 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
int minor = iminor(inode);
drm_file_t *priv;
int ret;
+ int i,j;
if (filp->f_flags & O_EXCL)
return -EBUSY; /* No exclusive opens */
@@ -256,6 +265,22 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
priv->authenticated = capable(CAP_SYS_ADMIN);
priv->lock_count = 0;
+ INIT_LIST_HEAD(&priv->user_objects);
+ 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->open) {
ret = dev->driver->open(dev, priv);
if (ret < 0)
@@ -320,6 +345,53 @@ int drm_fasync(int fd, struct file *filp, int on)
}
EXPORT_SYMBOL(drm_fasync);
+static void drm_object_release(struct file *filp) {
+
+ drm_file_t *priv = filp->private_data;
+ struct list_head *head;
+ drm_user_object_t *user_object;
+ drm_ref_object_t *ref_object;
+ int i;
+
+ /*
+ * Free leftover ref objects created by me. Note that we cannot use
+ * list_for_each() here, as the struct_mutex may be temporarily released
+ * by the remove_() functions, and thus the lists may be altered.
+ * Also, a drm_remove_ref_object() will not remove it
+ * from the list unless its refcount is 1.
+ */
+
+ head = &priv->refd_objects;
+ while (head->next != head) {
+ ref_object = list_entry(head->next, drm_ref_object_t, list);
+ drm_remove_ref_object(priv, ref_object);
+ head = &priv->refd_objects;
+ }
+
+ /*
+ * Free leftover user objects created by me.
+ */
+
+ head = &priv->user_objects;
+ while (head->next != head) {
+ user_object = list_entry(head->next, drm_user_object_t, list);
+ drm_remove_user_object(priv, user_object);
+ head = &priv->user_objects;
+ }
+
+
+
+
+ for(i=0; i<_DRM_NO_REF_TYPES; ++i) {
+ drm_ht_remove(&priv->refd_object_hash[i]);
+ }
+}
+
+
+
+
+
+
/**
* Release file.
*
@@ -354,58 +426,43 @@ int drm_release(struct inode *inode, struct file *filp)
current->pid, (long)old_encode_dev(priv->head->device),
dev->open_count);
- if (priv->lock_count && dev->lock.hw_lock &&
- _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) &&
- dev->lock.filp == filp) {
- DRM_DEBUG("File %p released, freeing lock for context %d\n",
- filp, _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
-
- if (dev->driver->reclaim_buffers_locked)
- dev->driver->reclaim_buffers_locked(dev, filp);
+ if (dev->driver->reclaim_buffers_locked) {
+ unsigned long _end = jiffies + DRM_HZ*3;
- drm_lock_free(dev, &dev->lock.hw_lock->lock,
- _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
+ do {
+ retcode = drm_kernel_take_hw_lock(filp);
+ } while(retcode && !time_after_eq(jiffies,_end));
- /* FIXME: may require heavy-handed reset of
- hardware at this point, possibly
- processed via a callback to the X
- server. */
- } else if (dev->driver->reclaim_buffers_locked && priv->lock_count
- && dev->lock.hw_lock) {
- /* The lock is required to reclaim buffers */
- DECLARE_WAITQUEUE(entry, current);
-
- add_wait_queue(&dev->lock.lock_queue, &entry);
- for (;;) {
- __set_current_state(TASK_INTERRUPTIBLE);
- if (!dev->lock.hw_lock) {
- /* Device has been unregistered */
- retcode = -EINTR;
- break;
- }
- if (drm_lock_take(&dev->lock.hw_lock->lock,
- DRM_KERNEL_CONTEXT)) {
- dev->lock.filp = filp;
- dev->lock.lock_time = jiffies;
- atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
- break; /* Got lock */
- }
- /* Contention */
- schedule();
- if (signal_pending(current)) {
- retcode = -ERESTARTSYS;
- break;
- }
- }
- __set_current_state(TASK_RUNNING);
- remove_wait_queue(&dev->lock.lock_queue, &entry);
if (!retcode) {
dev->driver->reclaim_buffers_locked(dev, filp);
+
drm_lock_free(dev, &dev->lock.hw_lock->lock,
- DRM_KERNEL_CONTEXT);
+ _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
+ } else {
+
+ /*
+ * FIXME: This is not a good solution. We should perhaps associate the
+ * DRM lock with a process context, and check whether the current process
+ * holds the lock. Then we can run reclaim buffers locked anyway.
+ */
+
+ DRM_ERROR("Reclaim buffers locked deadlock.\n");
+ DRM_ERROR("This is probably a single thread having multiple\n");
+ DRM_ERROR("DRM file descriptors open either dying or "
+ "closing file descriptors\n");
+ DRM_ERROR("while having the lock. I will not reclaim buffers.\n");
+ DRM_ERROR("Locking context is 0x%08x\n",
+ _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
}
+ } else if (drm_i_have_hw_lock(filp)) {
+ DRM_DEBUG("File %p released, freeing lock for context %d\n",
+ filp, _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));
}
+
if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
!dev->driver->reclaim_buffers_locked) {
dev->driver->reclaim_buffers(dev, filp);
@@ -414,6 +471,7 @@ int drm_release(struct inode *inode, struct file *filp)
drm_fasync(-1, filp, 0);
mutex_lock(&dev->ctxlist_mutex);
+
if (dev->ctxlist && (!list_empty(&dev->ctxlist->head))) {
drm_ctx_list_t *pos, *n;
@@ -435,6 +493,7 @@ int drm_release(struct inode *inode, struct file *filp)
mutex_unlock(&dev->ctxlist_mutex);
mutex_lock(&dev->struct_mutex);
+ drm_object_release(filp);
if (priv->remove_auth_on_close == 1) {
drm_file_t *temp = dev->file_first;
while (temp) {
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 18:57:00 +0000