renesas/drm.git - libdrm, cloned from git://anongit.freedesktop.org/mesa/drm

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author	Adam Jackson <ajax@nwnk.net>	2005-07-10 22:42:42 +0000
committer	Adam Jackson <ajax@nwnk.net>	2005-07-10 22:42:42 +0000
commit	07d23f9c60f9358f064eab7d944f3b28484b51ef (patch)
tree	9687b5ed89314ad30a1939c6462ab5d6df0d4303 /shared/r128_irq.c
parent	04fea060023a539c6c6766ec184b59f32c97d474 (diff)

autoconfiscate libdrm

Diffstat (limited to 'shared/r128_irq.c')

0 files changed, 0 insertions, 0 deletions

/************************************************************************** * * Copyright (c) 2006-2007 Tungsten Graphics, Inc., Cedar Park, TX., USA * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS, AUTHORS 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: Thomas Hellström <thomas-at-tungstengraphics-dot-com> */ #include "drmP.h" int drm_add_user_object(struct drm_file * priv, struct drm_user_object * item, int shareable) { struct drm_device *dev = priv->head->dev; int ret; DRM_ASSERT_LOCKED(&dev->struct_mutex); atomic_set(&item->refcount, 1); item->shareable = shareable; item->owner = priv; ret = drm_ht_just_insert_please(&dev->object_hash, &item->hash, (unsigned long)item, 32, 0, 0); if (ret) return ret; list_add_tail(&item->list, &priv->user_objects); return 0; } struct drm_user_object *drm_lookup_user_object(struct drm_file * priv, uint32_t key) { struct drm_device *dev = priv->head->dev; struct drm_hash_item *hash; int ret; struct drm_user_object *item; DRM_ASSERT_LOCKED(&dev->struct_mutex); ret = drm_ht_find_item(&dev->object_hash, key, &hash); if (ret) { return NULL; } item = drm_hash_entry(hash, struct drm_user_object, hash); if (priv != item->owner) { struct drm_open_hash *ht = &priv->refd_object_hash[_DRM_REF_USE]; ret = drm_ht_find_item(ht, (unsigned long)item, &hash); if (ret) { DRM_ERROR("Object not registered for usage\n"); return NULL; } } return item; } static void drm_deref_user_object(struct drm_file * priv, struct drm_user_object * item) { struct drm_device *dev = priv->head->dev; int ret; if (atomic_dec_and_test(&item->refcount)) { ret = drm_ht_remove_item(&dev->object_hash, &item->hash); BUG_ON(ret); list_del_init(&item->list); item->remove(priv, item); } } int drm_remove_user_object(struct drm_file * priv, struct drm_user_object * item) { DRM_ASSERT_LOCKED(&priv->head->dev->struct_mutex); if (item->owner != priv) { DRM_ERROR("Cannot destroy object not owned by you.\n"); return -EINVAL; } item->owner = 0; item->shareable = 0; list_del_init(&item->list); drm_deref_user_object(priv, item); return 0; } static int drm_object_ref_action(struct drm_file * priv, struct drm_user_object * ro, enum drm_ref_type action) { int ret = 0; switch (action) { case _DRM_REF_USE: atomic_inc(&ro->refcount); break; default: if (!ro->ref_struct_locked) { break; } else { ro->ref_struct_locked(priv, ro, action); } } return ret; } int drm_add_ref_object(struct drm_file * priv, struct drm_user_object * referenced_object, enum drm_ref_type ref_action) { int ret = 0; struct drm_ref_object *item; struct drm_open_hash *ht = &priv->refd_object_hash[ref_action]; DRM_ASSERT_LOCKED(&priv->head->dev->struct_mutex); if (!referenced_object->shareable && priv != referenced_object->owner) { DRM_ERROR("Not allowed to reference this object\n"); return -EINVAL; } /* * If this is not a usage reference, Check that usage has been registered * first. Otherwise strange things may happen on destruction. */ if ((ref_action != _DRM_REF_USE) && priv != referenced_object->owner) { item = drm_lookup_ref_object(priv, referenced_object, _DRM_REF_USE); if (!item) { DRM_ERROR ("Object not registered for usage by this client\n"); return -EINVAL; } } if (NULL != (item = drm_lookup_ref_object(priv, referenced_object, ref_action))) { atomic_inc(&item->refcount); return drm_object_ref_action(priv, referenced_object, ref_action); } item = drm_ctl_calloc(1, sizeof(*item), DRM_MEM_OBJECTS); if (item == NULL) { DRM_ERROR("Could not allocate reference object\n"); return -ENOMEM; } atomic_set(&item->refcount, 1);


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