// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2020 NXP
 *
 * File containing client-side RPC functions for the RM service. These
 * function are ported to clients that communicate to the SC.
 */

#include <linux/firmware/imx/svc/rm.h>

struct imx_sc_msg_rm_rsrc_owned {
        struct imx_sc_rpc_msg hdr;
        u16 resource;
} __packed __aligned(4);

/*
 * This function check @resource is owned by current partition or not
 *
 * @param[in]     ipc         IPC handle
 * @param[in]     resource    resource the control is associated with
 *
 * @return Returns 0 for not owned and 1 for owned.
 */
bool imx_sc_rm_is_resource_owned(struct imx_sc_ipc *ipc, u16 resource)
{
        struct imx_sc_msg_rm_rsrc_owned msg;
        struct imx_sc_rpc_msg *hdr = &msg.hdr;

        hdr->ver = IMX_SC_RPC_VERSION;
        hdr->svc = IMX_SC_RPC_SVC_RM;
        hdr->func = IMX_SC_RM_FUNC_IS_RESOURCE_OWNED;
        hdr->size = 2;

        msg.resource = resource;

        /*
         * SCU firmware only returns value 0 or 1
         * for resource owned check which means not owned or owned.
         * So it is always successful.
         */
        imx_scu_call_rpc(ipc, &msg, true);

        return hdr->func;
}
EXPORT_SYMBOL(imx_sc_rm_is_resource_owned);

struct imx_sc_msg_rm_get_resource_owner {
        struct imx_sc_rpc_msg hdr;
        union {
                struct {
                        u16 resource;
                } req;
                struct {
                        u8 val;
                } resp;
        } data;
} __packed __aligned(4);

/*
 * This function get @resource partition number
 *
 * @param[in]     ipc         IPC handle
 * @param[in]     resource    resource the control is associated with
 * @param[out]    pt          pointer to return the partition number
 *
 * @return Returns 0 for success and < 0 for errors.
 */
int imx_sc_rm_get_resource_owner(struct imx_sc_ipc *ipc, u16 resource, u8 *pt)
{
        struct imx_sc_msg_rm_get_resource_owner msg;
        struct imx_sc_rpc_msg *hdr = &msg.hdr;
        int ret;

        hdr->ver = IMX_SC_RPC_VERSION;
        hdr->svc = IMX_SC_RPC_SVC_RM;
        hdr->func = IMX_SC_RM_FUNC_GET_RESOURCE_OWNER;
        hdr->size = 2;

        msg.data.req.resource = resource;

        ret = imx_scu_call_rpc(ipc, &msg, true);
        if (ret)
                return ret;

        if (pt)
                *pt = msg.data.resp.val;

        return 0;
}
EXPORT_SYMBOL(imx_sc_rm_get_resource_owner);