7  * This driver supports an interface for DCA clients and providers to meet.
13 #include <linux/dca.h>
79 	struct dca_provider *dca, *_dca;  in unregister_dca_providers()  local
99 	list_for_each_entry_safe(dca, _dca, &domain->dca_providers, node)  in unregister_dca_providers()
100 		list_move(&dca->node, &unregistered_providers);  in unregister_dca_providers()
106 	list_for_each_entry_safe(dca, _dca, &unregistered_providers, node) {  in unregister_dca_providers()
107 		dca_sysfs_remove_provider(dca);  in unregister_dca_providers()
108 		list_del(&dca->node);  in unregister_dca_providers()
141 	struct dca_provider *dca;  in dca_find_provider_by_dev()  local
159 	list_for_each_entry(dca, &domain->dca_providers, node)  in dca_find_provider_by_dev()
160 		if ((!dev) || (dca->ops->dev_managed(dca, dev)))  in dca_find_provider_by_dev()
161 			return dca;  in dca_find_provider_by_dev()
167  * dca_add_requester - add a dca client to the list
168  * @dev - the device that wants dca service
172 	struct dca_provider *dca;  in dca_add_requester()  local
184 	dca = dca_find_provider_by_dev(dev);  in dca_add_requester()
185 	if (dca) {  in dca_add_requester()
197 	list_for_each_entry(dca, &domain->dca_providers, node) {  in dca_add_requester()
198 		slot = dca->ops->add_requester(dca, dev);  in dca_add_requester()
208 	err = dca_sysfs_add_req(dca, dev, slot);  in dca_add_requester()
211 		if (dca == dca_find_provider_by_dev(dev))  in dca_add_requester()
212 			dca->ops->remove_requester(dca, dev);  in dca_add_requester()
222  * dca_remove_requester - remove a dca client from the list
223  * @dev - the device that wants dca service
227 	struct dca_provider *dca;  in dca_remove_requester()  local
235 	dca = dca_find_provider_by_dev(dev);  in dca_remove_requester()
236 	if (!dca) {  in dca_remove_requester()
240 	slot = dca->ops->remove_requester(dca, dev);  in dca_remove_requester()
246 	dca_sysfs_remove_req(dca, slot);  in dca_remove_requester()
253  * dca_common_get_tag - return the dca tag (serves both new and old api)
254  * @dev - the device that wants dca service
259 	struct dca_provider *dca;  in dca_common_get_tag()  local
265 	dca = dca_find_provider_by_dev(dev);  in dca_common_get_tag()
266 	if (!dca) {  in dca_common_get_tag()
270 	tag = dca->ops->get_tag(dca, dev, cpu);  in dca_common_get_tag()
277  * dca3_get_tag - return the dca tag to the requester device
279  * @dev - the device that wants dca service
292  * dca_get_tag - return the dca tag for the given cpu (old api)
302  * alloc_dca_provider - get data struct for describing a dca provider
303  * @ops - pointer to struct of dca operation function pointers
309 	struct dca_provider *dca;  in alloc_dca_provider()  local
312 	alloc_size = (sizeof(*dca) + priv_size);  in alloc_dca_provider()
313 	dca = kzalloc(alloc_size, GFP_KERNEL);  in alloc_dca_provider()
314 	if (!dca)  in alloc_dca_provider()
316 	dca->ops = ops;  in alloc_dca_provider()
318 	return dca;  in alloc_dca_provider()
323  * free_dca_provider - release the dca provider data struct
324  * @ops - pointer to struct of dca operation function pointers
327 void free_dca_provider(struct dca_provider *dca)  in free_dca_provider()  argument
329 	kfree(dca);  in free_dca_provider()
334  * register_dca_provider - register a dca provider
335  * @dca - struct created by alloc_dca_provider()
336  * @dev - device providing dca services
338 int register_dca_provider(struct dca_provider *dca, struct device *dev)  in register_dca_provider()  argument
351 	err = dca_sysfs_add_provider(dca, dev);  in register_dca_provider()
362 			dca_sysfs_remove_provider(dca);  in register_dca_provider()
381 	list_add(&dca->node, &domain->dca_providers);  in register_dca_provider()
392  * unregister_dca_provider - remove a dca provider
393  * @dca - struct created by alloc_dca_provider()
395 void unregister_dca_provider(struct dca_provider *dca, struct device *dev)  in unregister_dca_provider()  argument
411 	list_del(&dca->node);  in unregister_dca_provider()
420 	dca_sysfs_remove_provider(dca);  in unregister_dca_provider()
444 	pr_info("dca service started, version %s\n", DCA_VERSION);  in dca_init()