3  *  dpll_core.c - DPLL subsystem kernel-space interface implementation.
19 /* Mutex lock to protect DPLL subsystem devices and pins */
146 dpll_xa_ref_dpll_add(struct xarray *xa_dplls, struct dpll_device *dpll,  in dpll_xa_ref_dpll_add()  argument
156 		if (ref->dpll != dpll)  in dpll_xa_ref_dpll_add()
171 		ref->dpll = dpll;  in dpll_xa_ref_dpll_add()
173 		ret = xa_insert(xa_dplls, dpll->id, ref, GFP_KERNEL);  in dpll_xa_ref_dpll_add()
184 			xa_erase(xa_dplls, dpll->id);  in dpll_xa_ref_dpll_add()
199 dpll_xa_ref_dpll_del(struct xarray *xa_dplls, struct dpll_device *dpll,  in dpll_xa_ref_dpll_del()  argument
207 		if (ref->dpll != dpll)  in dpll_xa_ref_dpll_del()
236 	struct dpll_device *dpll;  in dpll_device_alloc()  local
239 	dpll = kzalloc(sizeof(*dpll), GFP_KERNEL);  in dpll_device_alloc()
240 	if (!dpll)  in dpll_device_alloc()
242 	refcount_set(&dpll->refcount, 1);  in dpll_device_alloc()
243 	INIT_LIST_HEAD(&dpll->registration_list);  in dpll_device_alloc()
244 	dpll->device_idx = device_idx;  in dpll_device_alloc()
245 	dpll->clock_id = clock_id;  in dpll_device_alloc()
246 	dpll->module = module;  in dpll_device_alloc()
247 	ret = xa_alloc_cyclic(&dpll_device_xa, &dpll->id, dpll, xa_limit_32b,  in dpll_device_alloc()
250 		kfree(dpll);  in dpll_device_alloc()
253 	xa_init_flags(&dpll->pin_refs, XA_FLAGS_ALLOC);  in dpll_device_alloc()
255 	return dpll;  in dpll_device_alloc()
259  * dpll_device_get - find existing or create new dpll device
264  * Get existing object of a dpll device, unique for given arguments.
275 	struct dpll_device *dpll, *ret = NULL;  in dpll_device_get()  local
279 	xa_for_each(&dpll_device_xa, index, dpll) {  in dpll_device_get()
280 		if (dpll->clock_id == clock_id &&  in dpll_device_get()
281 		    dpll->device_idx == device_idx &&  in dpll_device_get()
282 		    dpll->module == module) {  in dpll_device_get()
283 			ret = dpll;  in dpll_device_get()
298  * @dpll: dpll_device struct pointer
301  * Drop reference for a dpll device, if all references are gone, delete
302  * dpll device object.
304 void dpll_device_put(struct dpll_device *dpll)  in dpll_device_put()  argument
307 	if (refcount_dec_and_test(&dpll->refcount)) {  in dpll_device_put()
308 		ASSERT_DPLL_NOT_REGISTERED(dpll);  in dpll_device_put()
309 		WARN_ON_ONCE(!xa_empty(&dpll->pin_refs));  in dpll_device_put()
310 		xa_destroy(&dpll->pin_refs);  in dpll_device_put()
311 		xa_erase(&dpll_device_xa, dpll->id);  in dpll_device_put()
312 		WARN_ON(!list_empty(&dpll->registration_list));  in dpll_device_put()
313 		kfree(dpll);  in dpll_device_put()
320 dpll_device_registration_find(struct dpll_device *dpll,  in dpll_device_registration_find()  argument
325 	list_for_each_entry(reg, &dpll->registration_list, list) {  in dpll_device_registration_find()
333  * dpll_device_register - register the dpll device in the subsystem
334  * @dpll: pointer to a dpll
335  * @type: type of a dpll
336  * @ops: ops for a dpll device
339  * Make dpll device available for user space.
346 int dpll_device_register(struct dpll_device *dpll, enum dpll_type type,  in dpll_device_register()  argument
362 	reg = dpll_device_registration_find(dpll, ops, priv);  in dpll_device_register()
375 	dpll->type = type;  in dpll_device_register()
376 	first_registration = list_empty(&dpll->registration_list);  in dpll_device_register()
377 	list_add_tail(&reg->list, &dpll->registration_list);  in dpll_device_register()
383 	xa_set_mark(&dpll_device_xa, dpll->id, DPLL_REGISTERED);  in dpll_device_register()
384 	dpll_device_create_ntf(dpll);  in dpll_device_register()
392  * dpll_device_unregister - unregister dpll device
393  * @dpll: registered dpll pointer
394  * @ops: ops for a dpll device
401 void dpll_device_unregister(struct dpll_device *dpll,  in dpll_device_unregister()  argument
407 	ASSERT_DPLL_REGISTERED(dpll);  in dpll_device_unregister()
408 	dpll_device_delete_ntf(dpll);  in dpll_device_unregister()
409 	reg = dpll_device_registration_find(dpll, ops, priv);  in dpll_device_unregister()
417 	if (!list_empty(&dpll->registration_list)) {  in dpll_device_unregister()
421 	xa_clear_mark(&dpll_device_xa, dpll->id, DPLL_REGISTERED);  in dpll_device_unregister()
532  * dpll_pin_get - find existing or create new dpll pin
536  * @prop: dpll pin properties
594 __dpll_pin_register(struct dpll_device *dpll, struct dpll_pin *pin,  in __dpll_pin_register()  argument
599 	ret = dpll_xa_ref_pin_add(&dpll->pin_refs, pin, ops, priv);  in __dpll_pin_register()
602 	ret = dpll_xa_ref_dpll_add(&pin->dpll_refs, dpll, ops, priv);  in __dpll_pin_register()
611 	dpll_xa_ref_pin_del(&dpll->pin_refs, pin, ops, priv);  in __dpll_pin_register()
616  * dpll_pin_register - register the dpll pin in the subsystem
617  * @dpll: pointer to a dpll
618  * @pin: pointer to a dpll pin
619  * @ops: ops for a dpll pin ops
628 dpll_pin_register(struct dpll_device *dpll, struct dpll_pin *pin,  in dpll_pin_register()  argument
639 	if (WARN_ON(!(dpll->module == pin->module &&  in dpll_pin_register()
640 		      dpll->clock_id == pin->clock_id)))  in dpll_pin_register()
643 		ret = __dpll_pin_register(dpll, pin, ops, priv);  in dpll_pin_register()
651 __dpll_pin_unregister(struct dpll_device *dpll, struct dpll_pin *pin,  in __dpll_pin_unregister()  argument
654 	dpll_xa_ref_pin_del(&dpll->pin_refs, pin, ops, priv);  in __dpll_pin_unregister()
655 	dpll_xa_ref_dpll_del(&pin->dpll_refs, dpll, ops, priv);  in __dpll_pin_unregister()
661  * dpll_pin_unregister - unregister dpll pin from dpll device
662  * @dpll: registered dpll pointer
664  * @ops: ops for a dpll pin
670 void dpll_pin_unregister(struct dpll_device *dpll, struct dpll_pin *pin,  in dpll_pin_unregister()  argument
673 	if (WARN_ON(xa_empty(&dpll->pin_refs)))  in dpll_pin_unregister()
680 	__dpll_pin_unregister(dpll, pin, ops, priv);  in dpll_pin_unregister()
689  * @ops: ops for a dpll pin
721 		ret = __dpll_pin_register(ref->dpll, pin, ops, priv);  in dpll_pin_on_pin_register()
735 			__dpll_pin_unregister(ref->dpll, pin, ops, priv);  in dpll_pin_on_pin_register()
747  * dpll_pin_on_pin_unregister - unregister dpll pin from a parent pin
750  * @ops: ops for a dpll pin
767 		__dpll_pin_unregister(ref->dpll, pin, ops, priv);  in dpll_pin_on_pin_unregister()
773 dpll_device_registration_first(struct dpll_device *dpll)  in dpll_device_registration_first()  argument
777 	reg = list_first_entry_or_null((struct list_head *)&dpll->registration_list,  in dpll_device_registration_first()
783 void *dpll_priv(struct dpll_device *dpll)  in dpll_priv()  argument
787 	reg = dpll_device_registration_first(dpll);  in dpll_priv()
791 const struct dpll_device_ops *dpll_device_ops(struct dpll_device *dpll)  in dpll_device_ops()  argument
795 	reg = dpll_device_registration_first(dpll);  in dpll_device_ops()
810 void *dpll_pin_on_dpll_priv(struct dpll_device *dpll,  in dpll_pin_on_dpll_priv()  argument
816 	ref = xa_load(&dpll->pin_refs, pin->pin_idx);  in dpll_pin_on_dpll_priv()