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 47 struct 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 number 61 * 62 * @param[in] ipc IPC handle 63 * @param[in] resource resource the control is associated with 64 * @param[out] pt pointer to return the partition number 65 * 66 * @return Returns 0 for success and < 0 for errors. 67 */ 68 int 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 } 90 EXPORT_SYMBOL(imx_sc_rm_get_resource_owner); 91