[PATCH v4 2/3] sbi_utils: mailbox: add RPMI REQUEST_FORWARD service group definitions

[Anup Patel]

On Fri, Sep 11, 2026 at 2:38 AM Pawandeep Oza
<pawandeep.oza at oss.qualcomm.com> wrote:
>
> From: Oza Pawandeep <pawandeep.oza at oss.qualcomm.com>
>
> Add message protocol definitions for the RPMI REQUEST_FORWARD service
> group (SERVICEGROUP_ID: 0x000D).
>
> The following are introduced:
>
>   - enum rpmi_request_forward_service_id: service IDs for the
>     REQUEST_FORWARD service group:
>       - REQFWD_ENABLE_NOTIFICATION  (0x01)
>       - REQFWD_RETRIEVE_CURRENT_MESSAGE (0x02)
>       - REQFWD_COMPLETE_CURRENT_MESSAGE (0x03)
>
>   - struct rpmi_request_forward_resp: response structure for
>     REQFWD_RETRIEVE_CURRENT_MESSAGE (SERVICE_ID 0x02) carrying
>     status, remaining bytes, returned bytes and a flexible array
>     member for the inline message data.
>
>   - struct rpmi_request_complete_resp: response structure for
>     REQFWD_COMPLETE_CURRENT_MESSAGE (SERVICE_ID 0x03) carrying
>     status and the number of pending forwarded messages.
>
> These definitions are used by the MPXY bridge driver to implement
> the RPMI REQUEST_FORWARD protocol for inter-domain message passing
> over the SBI MPXY extension.
>
> Signed-off-by: Oza Pawandeep <pawandeep.oza at oss.qualcomm.com>

LGTM.

Reviewed-by: Anup Patel <anup at brainfault.org>

Regards,
Anup

> ---
>  include/sbi_utils/mailbox/rpmi_msgprot.h | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
>
> diff --git a/include/sbi_utils/mailbox/rpmi_msgprot.h b/include/sbi_utils/mailbox/rpmi_msgprot.h
> index 7ae4abe0..c5d564ac 100644
> --- a/include/sbi_utils/mailbox/rpmi_msgprot.h
> +++ b/include/sbi_utils/mailbox/rpmi_msgprot.h
> @@ -1064,4 +1064,24 @@ struct rpmi_logging_log_data_resp {
>         s32 status;
>  };
>
> +/** RPMI REQUEST_FORWARD ServiceGroup Service IDs */
> +enum rpmi_request_forward_service_id {
> +       REQFWD_ENABLE_NOTIFICATION = 0x01,
> +       REQFWD_RETRIEVE_CURRENT_MESSAGE = 0x02,
> +       REQFWD_COMPLETE_CURRENT_MESSAGE,
> +};
> +
> +struct rpmi_request_forward_resp {
> +       u32 status;
> +       u32 remaining;
> +       u32 returned;
> +       u8 data[];
> +};
> +
> +/** RPMI MM ServiceGroup Communicate response struct */
> +struct rpmi_request_complete_resp {
> +       u32 status;
> +       u32 num_of_messages;
> +};
> +
>  #endif /* !__RPMI_MSGPROT_H__ */
> --
> 2.43.0
>