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
11struct 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 */
24bool 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}
45EXPORT_SYMBOL(imx_sc_rm_is_resource_owned);