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// 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);
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