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1// SPDX-License-Identifier: GPL-2.0+2/*3 * Copyright 2020 NXP4 *5 * File containing client-side RPC functions for the RM service. These6 * 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 not18 *19 * @param[in] ipc IPC handle20 * @param[in] resource resource the control is associated with21 *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 138 * 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);46 47struct imx_sc_msg_rm_get_resource_owner {48 struct imx_sc_rpc_msg hdr;49 union {50 struct {51 u16 resource;52 } req;53 struct {54 u8 val;55 } resp;56 } data;57} __packed __aligned(4);58 59/*60 * This function get @resource partition number61 *62 * @param[in] ipc IPC handle63 * @param[in] resource resource the control is associated with64 * @param[out] pt pointer to return the partition number65 *66 * @return Returns 0 for success and < 0 for errors.67 */68int imx_sc_rm_get_resource_owner(struct imx_sc_ipc *ipc, u16 resource, u8 *pt)69{70 struct imx_sc_msg_rm_get_resource_owner msg;71 struct imx_sc_rpc_msg *hdr = &msg.hdr;72 int ret;73 74 hdr->ver = IMX_SC_RPC_VERSION;75 hdr->svc = IMX_SC_RPC_SVC_RM;76 hdr->func = IMX_SC_RM_FUNC_GET_RESOURCE_OWNER;77 hdr->size = 2;78 79 msg.data.req.resource = resource;80 81 ret = imx_scu_call_rpc(ipc, &msg, true);82 if (ret)83 return ret;84 85 if (pt)86 *pt = msg.data.resp.val;87 88 return 0;89}90EXPORT_SYMBOL(imx_sc_rm_get_resource_owner);91