7  * This driver supports an interface for DCA clients and providers to meet.
13 #include <linux/dca.h>
20 MODULE_DESCRIPTION("Intel Direct Cache Access (DCA) service module");
80 	struct dca_provider *dca, *_dca;  in unregister_dca_providers()  local
100 	list_for_each_entry_safe(dca, _dca, &domain->dca_providers, node)  in unregister_dca_providers()
101 		list_move(&dca->node, &unregistered_providers);  in unregister_dca_providers()
107 	list_for_each_entry_safe(dca, _dca, &unregistered_providers, node) {  in unregister_dca_providers()
108 		dca_sysfs_remove_provider(dca);  in unregister_dca_providers()
109 		list_del(&dca->node);  in unregister_dca_providers()
142 	struct dca_provider *dca;  in dca_find_provider_by_dev()  local
160 	list_for_each_entry(dca, &domain->dca_providers, node)  in dca_find_provider_by_dev()
161 		if ((!dev) || (dca->ops->dev_managed(dca, dev)))  in dca_find_provider_by_dev()
162 			return dca;  in dca_find_provider_by_dev()
168  * dca_add_requester - add a dca client to the list
169  * @dev - the device that wants dca service
173 	struct dca_provider *dca;  in dca_add_requester()  local
185 	dca = dca_find_provider_by_dev(dev);  in dca_add_requester()
186 	if (dca) {  in dca_add_requester()
198 	list_for_each_entry(dca, &domain->dca_providers, node) {  in dca_add_requester()
199 		slot = dca->ops->add_requester(dca, dev);  in dca_add_requester()
209 	err = dca_sysfs_add_req(dca, dev, slot);  in dca_add_requester()
212 		if (dca == dca_find_provider_by_dev(dev))  in dca_add_requester()
213 			dca->ops->remove_requester(dca, dev);  in dca_add_requester()
223  * dca_remove_requester - remove a dca client from the list
224  * @dev - the device that wants dca service
228 	struct dca_provider *dca;  in dca_remove_requester()  local
236 	dca = dca_find_provider_by_dev(dev);  in dca_remove_requester()
237 	if (!dca) {  in dca_remove_requester()
241 	slot = dca->ops->remove_requester(dca, dev);  in dca_remove_requester()
247 	dca_sysfs_remove_req(dca, slot);  in dca_remove_requester()
254  * dca_common_get_tag - return the dca tag (serves both new and old api)
255  * @dev - the device that wants dca service
260 	struct dca_provider *dca;  in dca_common_get_tag()  local
266 	dca = dca_find_provider_by_dev(dev);  in dca_common_get_tag()
267 	if (!dca) {  in dca_common_get_tag()
271 	tag = dca->ops->get_tag(dca, dev, cpu);  in dca_common_get_tag()
278  * dca3_get_tag - return the dca tag to the requester device
280  * @dev - the device that wants dca service
293  * dca_get_tag - return the dca tag for the given cpu (old api)
303  * alloc_dca_provider - get data struct for describing a dca provider
304  * @ops - pointer to struct of dca operation function pointers
310 	struct dca_provider *dca;  in alloc_dca_provider()  local
313 	alloc_size = (sizeof(*dca) + priv_size);  in alloc_dca_provider()
314 	dca = kzalloc(alloc_size, GFP_KERNEL);  in alloc_dca_provider()
315 	if (!dca)  in alloc_dca_provider()
317 	dca->ops = ops;  in alloc_dca_provider()
319 	return dca;  in alloc_dca_provider()
324  * free_dca_provider - release the dca provider data struct
325  * @ops - pointer to struct of dca operation function pointers
328 void free_dca_provider(struct dca_provider *dca)  in free_dca_provider()  argument
330 	kfree(dca);  in free_dca_provider()
335  * register_dca_provider - register a dca provider
336  * @dca - struct created by alloc_dca_provider()
337  * @dev - device providing dca services
339 int register_dca_provider(struct dca_provider *dca, struct device *dev)  in register_dca_provider()  argument
352 	err = dca_sysfs_add_provider(dca, dev);  in register_dca_provider()
363 			dca_sysfs_remove_provider(dca);  in register_dca_provider()
382 	list_add(&dca->node, &domain->dca_providers);  in register_dca_provider()
393  * unregister_dca_provider - remove a dca provider
394  * @dca - struct created by alloc_dca_provider()
396 void unregister_dca_provider(struct dca_provider *dca, struct device *dev)  in unregister_dca_provider()  argument
412 	list_del(&dca->node);  in unregister_dca_provider()
421 	dca_sysfs_remove_provider(dca);  in unregister_dca_provider()
445 	pr_info("dca service started, version %s\n", DCA_VERSION);  in dca_init()