mirror of
https://github.com/torvalds/linux.git
synced 2024-11-27 14:41:39 +00:00
6d24017081
Add resource owner management API, this API could be used to check whether M4 is under control of Linux. Signed-off-by: Peng Fan <peng.fan@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
// 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);
|