| 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: &msg, have_resp: 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: &msg, have_resp: 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 |