1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2020 NXP 4 * 5 * File containing client-side RPC functions for the RM service. These 6 * function are ported to clients that communicate to the SC. 7 */ 8 9 #include <linux/firmware/imx/svc/rm.h> 10 11 struct imx_sc_msg_rm_rsrc_owned { 12 struct imx_sc_rpc_msg hdr; 13 u16 resource; 14 } __packed __aligned(4); 15 16 /* 17 * This function check @resource is owned by current partition or not 18 * 19 * @param[in] ipc IPC handle 20 * @param[in] resource resource the control is associated with 21 * 22 * @return Returns 0 for not owned and 1 for owned. 23 */ 24 bool imx_sc_rm_is_resource_owned(struct imx_sc_ipc *ipc, u16 resource) 25 { 26 struct imx_sc_msg_rm_rsrc_owned msg; 27 struct imx_sc_rpc_msg *hdr = &msg.hdr; 28 29 hdr->ver = IMX_SC_RPC_VERSION; 30 hdr->svc = IMX_SC_RPC_SVC_RM; 31 hdr->func = IMX_SC_RM_FUNC_IS_RESOURCE_OWNED; 32 hdr->size = 2; 33 34 msg.resource = resource; 35 36 /* 37 * SCU firmware only returns value 0 or 1 38 * for resource owned check which means not owned or owned. 39 * So it is always successful. 40 */ 41 imx_scu_call_rpc(ipc, &msg, true); 42 43 return hdr->func; 44 } 45 EXPORT_SYMBOL(imx_sc_rm_is_resource_owned); 46