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path: root/shared-core/radeon_irq.c
AgeCommit message (Expand)Author
2005-11-28Assert an MIT copyright on sis_drm.h, since one was lacking and I createdEric Anholt
2005-11-11fix up radeon whitespaceDave Airlie
2005-06-06fix some issues with radeon interrupt handlingDave Airlie
2005-02-01cleanup patch from Adrian Bunk <bunk@stusta.de>Dave Airlie
2004-09-30Lindent of core build. Drivers checked for no binary diffs. A few filesJon Smirl
2004-09-27First check in for DRM that splits core from personality modulesJon Smirl
2004-08-24Merged drmfntbl-0-0-2Dave Airlie
2004-07-25sync up with current 2.6 kernel bk tree - mostly __user annotationsDave Airlie
2003-10-17- Move IRQ functions from drm_dma.h to new drm_irq.h and disentangle themEric Anholt
2003-07-29IRQ code cleanup suggested by Linus TorvaldsMichel Daenzer
2003-07-25Compile fixes for recent 2.5/2.6 Linux kernels. I hope this doesn't breakMichel Daenzer
2003-04-26Ensure driver has been initialized (dev_private != NULL) before installingLeif Delgass
2003-03-28merged drm-filp-0-1-branchKeith Whitwell
2003-02-04only acknowledge interrupts we handle - others could be used outside theMichel Daenzer
2002-12-04further vertical blank interrupt cleanups: remove unused variable,Michel Daenzer
2002-12-03vertical blank interrupt cleanups: use spinlock instead of semaphore, sendMichel Daenzer
2002-11-30vertical blank ioctl can send signal instead of blockingMichel Daenzer
2002-10-01fix wait condition for vertical blank IRQsMichel Daenzer
2002-09-29Move os-dependent stuff out of radeon_irq.cKeith Whitwell
2002-09-29Fix up BSD irq handling.Eric Anholt
2002-09-27make SW interrupts more robust: write sequence number to scratch register,Michel Daenzer
2002-09-26DRM(vblank_wait) is driver specificMichel Daenzer
2002-09-25common ioctl to wait for vertical blank IRQsMichel Daenzer
2002-09-23merged r200-0-2-branch to trunkKeith Whitwell
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-14 01:53:36 +0000
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/**************************************************************************
 * 
 * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., 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 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.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * 
 **************************************************************************/

#include "drmP.h"

int drm_add_user_object(drm_file_t * priv, drm_user_object_t * item,
			int shareable)
{
	drm_device_t *dev = priv->head->dev;
	int ret;

	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;
}

drm_user_object_t *drm_lookup_user_object(drm_file_t * priv, uint32_t key)
{
	drm_device_t *dev = priv->head->dev;
	drm_hash_item_t *hash;
	int ret;
	drm_user_object_t *item;

	ret = drm_ht_find_item(&dev->object_hash, key, &hash);
	if (ret) {
		return NULL;
	}
	item = drm_hash_entry(hash, drm_user_object_t, hash);

	if (priv != item->owner) {
		drm_open_hash_t *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(drm_file_t * priv, drm_user_object_t * item)
{
	drm_device_t *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(drm_file_t * priv, drm_user_object_t * item)
{
	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(drm_file_t * priv, drm_user_object_t * ro,
				 drm_ref_t 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(drm_file_t * priv, drm_user_object_t * referenced_object,
		       drm_ref_t ref_action)
{
	int ret = 0;
	drm_ref_object_t *item;
	drm_open_hash_t *ht = &priv->refd_object_hash[ref_action];

	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_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);
	item->hash.key = (unsigned long)referenced_object;
	ret = drm_ht_insert_item(ht, &item->hash);
	item->unref_action = ref_action;

	if (ret)
		goto out;

	list_add(&item->list, &priv->refd_objects);
	ret = drm_object_ref_action(priv, referenced_object, ref_action);
      out:
	return ret;
}

drm_ref_object_t *drm_lookup_ref_object(drm_file_t * priv,
					drm_user_object_t * referenced_object,
					drm_ref_t ref_action)
{
	drm_hash_item_t *hash;
	int ret;

	ret = drm_ht_find_item(&priv->refd_object_hash[ref_action],
			       (unsigned long)referenced_object, &hash);
	if (ret)
		return NULL;

	return drm_hash_entry(hash, drm_ref_object_t, hash);
}

static void drm_remove_other_references(drm_file_t * priv,
					drm_user_object_t * ro)
{
	int i;
	drm_open_hash_t *ht;
	drm_hash_item_t *hash;
	drm_ref_object_t *item;

	for (i = _DRM_REF_USE + 1; i < _DRM_NO_REF_TYPES; ++i) {
		ht = &priv->refd_object_hash[i];
		while (!drm_ht_find_item(ht, (unsigned long)ro, &hash)) {
			item = drm_hash_entry(hash, drm_ref_object_t, hash);
			drm_remove_ref_object(priv, item);
		}
	}
}

void drm_remove_ref_object(drm_file_t * priv, drm_ref_object_t * item)
{
	int ret;
	drm_user_object_t *user_object = (drm_user_object_t *) item->hash.key;
	drm_open_hash_t *ht = &priv->refd_object_hash[item->unref_action];
	drm_ref_t unref_action;

	unref_action = item->unref_action;
	if (atomic_dec_and_test(&item->refcount)) {
		ret = drm_ht_remove_item(ht, &item->hash);
		BUG_ON(ret);
		list_del_init(&item->list);
		if (unref_action == _DRM_REF_USE)
			drm_remove_other_references(priv, user_object);
		drm_free(item, sizeof(*item), DRM_MEM_OBJECTS);
	}

	switch (unref_action) {
	case _DRM_REF_USE:
		drm_deref_user_object(priv, user_object);
		break;
	default:
		BUG_ON(!user_object->unref);
		user_object->unref(priv, user_object, unref_action);
		break;
	}

}

int drm_user_object_ref(drm_file_t * priv, uint32_t user_token,
			drm_object_type_t type, drm_user_object_t ** object)
{
	drm_device_t *dev = priv->head->dev;
	drm_user_object_t *uo;
	int ret;

	mutex_lock(&dev->struct_mutex);
	uo = drm_lookup_user_object(priv, user_token);
	if (!uo || (uo->type != type)) {
		ret = -EINVAL;
		goto out_err;
	}
	ret = drm_add_ref_object(priv, uo, _DRM_REF_USE);
	if (ret)
		goto out_err;
	mutex_unlock(&dev->struct_mutex);
	*object = uo;
	DRM_ERROR("Referenced an object\n");
	return 0;
      out_err:
	mutex_unlock(&dev->struct_mutex);
	return ret;
}

int drm_user_object_unref(drm_file_t * priv, uint32_t user_token,
			  drm_object_type_t type)
{
	drm_device_t *dev = priv->head->dev;
	drm_user_object_t *uo;
	drm_ref_object_t *ro;
	int ret;

	mutex_lock(&dev->struct_mutex);
	uo = drm_lookup_user_object(priv, user_token);
	if (!uo || (uo->type != type)) {
		ret = -EINVAL;
		goto out_err;
	}
	ro = drm_lookup_ref_object(priv, uo, _DRM_REF_USE);
	if (!ro) {
		ret = -EINVAL;
		goto out_err;
	}
	drm_remove_ref_object(priv, ro);
	mutex_unlock(&dev->struct_mutex);
	DRM_ERROR("Unreferenced an object\n");
	return 0;
      out_err:
	mutex_unlock(&dev->struct_mutex);
	return ret;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-14 01:53:36 +0000