1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 2023, STMicroelectronics - All Rights Reserved
40 		return -EINVAL;  in stm32_firewall_get_firewall()
43 	of_for_each_phandle(&it, err, np, "access-controllers", "#access-controller-cells", 0) {  in stm32_firewall_get_firewall()
50 			pr_err("Unable to get access-controllers property for node %s\n, err: %d",  in stm32_firewall_get_firewall()
51 			       np->full_name, err);  in stm32_firewall_get_firewall()
57 			pr_err("Too many firewall controllers");  in stm32_firewall_get_firewall()
59 			return -EINVAL;  in stm32_firewall_get_firewall()
68 			if (ctrl->dev->of_node->phandle == it.phandle) {  in stm32_firewall_get_firewall()
78 			pr_err("No firewall controller registered for %s\n", np->full_name);  in stm32_firewall_get_firewall()
80 			return -ENODEV;  in stm32_firewall_get_firewall()
83 		err = of_property_read_string_index(np, "access-controller-names", j, &fw_entry);  in stm32_firewall_get_firewall()
91 			return -EINVAL;  in stm32_firewall_get_firewall()
103 		for (i = 0; i < provider_args.args_count - 1; i++)  in stm32_firewall_get_firewall()
107 		firewall[j].extra_args_size = provider_args.args_count - 1;  in stm32_firewall_get_firewall()
120 	if (!firewall || firewall->firewall_id == U32_MAX)  in stm32_firewall_grant_access()
121 		return -EINVAL;  in stm32_firewall_grant_access()
123 	firewall_controller = firewall->firewall_ctrl;  in stm32_firewall_grant_access()
126 		return -ENODEV;  in stm32_firewall_grant_access()
128 	return firewall_controller->grant_access(firewall_controller, firewall->firewall_id);  in stm32_firewall_grant_access()
136 	if (!firewall || subsystem_id == U32_MAX || firewall->firewall_id == U32_MAX)  in stm32_firewall_grant_access_by_id()
137 		return -EINVAL;  in stm32_firewall_grant_access_by_id()
139 	firewall_controller = firewall->firewall_ctrl;  in stm32_firewall_grant_access_by_id()
142 		return -ENODEV;  in stm32_firewall_grant_access_by_id()
144 	return firewall_controller->grant_access(firewall_controller, subsystem_id);  in stm32_firewall_grant_access_by_id()
152 	if (!firewall || firewall->firewall_id == U32_MAX) {  in stm32_firewall_release_access()
153 		pr_debug("Incorrect arguments when releasing a firewall access\n");  in stm32_firewall_release_access()
157 	firewall_controller = firewall->firewall_ctrl;  in stm32_firewall_release_access()
164 	firewall_controller->release_access(firewall_controller, firewall->firewall_id);  in stm32_firewall_release_access()
172 	if (!firewall || subsystem_id == U32_MAX || firewall->firewall_id == U32_MAX) {  in stm32_firewall_release_access_by_id()
173 		pr_debug("Incorrect arguments when releasing a firewall access");  in stm32_firewall_release_access_by_id()
177 	firewall_controller = firewall->firewall_ctrl;  in stm32_firewall_release_access_by_id()
184 	firewall_controller->release_access(firewall_controller, subsystem_id);  in stm32_firewall_release_access_by_id()
195 		return -ENODEV;  in stm32_firewall_controller_register()
197 	pr_info("Registering %s firewall controller\n", firewall_controller->name);  in stm32_firewall_controller_register()
203 				 firewall_controller->name);  in stm32_firewall_controller_register()
208 	list_add_tail(&firewall_controller->entry, &firewall_controller_list);  in stm32_firewall_controller_register()
229 			list_del_init(&ctrl->entry);  in stm32_firewall_controller_unregister()
237 			 firewall_controller->name);  in stm32_firewall_controller_unregister()
250 	parent = firewall_controller->dev;  in stm32_firewall_populate_bus()
252 	dev_dbg(parent, "Populating %s system bus\n", dev_name(firewall_controller->dev));  in stm32_firewall_populate_bus()
255 		/* The access-controllers property is mandatory for firewall bus devices */  in stm32_firewall_populate_bus()
256 		len = of_count_phandle_with_args(child, "access-controllers",  in stm32_firewall_populate_bus()
257 						 "#access-controller-cells");  in stm32_firewall_populate_bus()
260 			return -EINVAL;  in stm32_firewall_populate_bus()
266 			return -ENOMEM;  in stm32_firewall_populate_bus()
277 			if (firewall_controller->grant_access(firewall_controller,  in stm32_firewall_populate_bus()
280 				 * Peripheral access not allowed or not defined.  in stm32_firewall_populate_bus()
285 					child->full_name);  in stm32_firewall_populate_bus()