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SubjectRE: [PATCH] firmware: imx: add get resource owner api
Date
> Subject: [PATCH] firmware: imx: add get resource owner api

Ping.. we need this API for remoteproc partition case.

Thanks,
Peng.

>
> From: Peng Fan <peng.fan@nxp.com>
>
> 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>
> ---
> drivers/firmware/imx/rm.c | 45
> +++++++++++++++++++++++++++++
> include/linux/firmware/imx/svc/rm.h | 5 ++++
> 2 files changed, 50 insertions(+)
>
> diff --git a/drivers/firmware/imx/rm.c b/drivers/firmware/imx/rm.c index
> a12db6ff323b..3c3605f98123 100644
> --- a/drivers/firmware/imx/rm.c
> +++ b/drivers/firmware/imx/rm.c
> @@ -43,3 +43,48 @@ bool imx_sc_rm_is_resource_owned(struct imx_sc_ipc
> *ipc, u16 resource)
> return hdr->func;
> }
> EXPORT_SYMBOL(imx_sc_rm_is_resource_owned);
> +
> +/*
> + * 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.
> + */
> +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);
> +
> +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);
> diff --git a/include/linux/firmware/imx/svc/rm.h
> b/include/linux/firmware/imx/svc/rm.h
> index 456b6a59d29b..ff481b23ea36 100644
> --- a/include/linux/firmware/imx/svc/rm.h
> +++ b/include/linux/firmware/imx/svc/rm.h
> @@ -59,11 +59,16 @@ enum imx_sc_rm_func {
>
> #if IS_ENABLED(CONFIG_IMX_SCU)
> bool imx_sc_rm_is_resource_owned(struct imx_sc_ipc *ipc, u16 resource);
> +int imx_sc_rm_get_resource_owner(struct imx_sc_ipc *ipc, u16 resource,
> +u8 *pt);
> #else
> static inline bool
> imx_sc_rm_is_resource_owned(struct imx_sc_ipc *ipc, u16 resource) {
> return true;
> }
> +static inline int imx_sc_rm_get_resource_owner(struct imx_sc_ipc *ipc,
> +u16 resource, u8 *pt) {
> + return -ENOTSUPP;
> +}
> #endif
> #endif
> --
> 2.25.1

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