On Tue, Dec 31, 2024 at 11:18:59AM +0530, Sricharan R wrote: > From: Sricharan Ramabadhran <quic_srichara@xxxxxxxxxxx> > > TMEL SS provides different kinds of services like secureboot, remote image > authentication, key management, crypto, OEM provisioning etc. This patch adds > support for remote image authentication. Support for rest of the services can > be added. > > The QMP mailbox is the primary means of communication between TMEL SS and other > subsystem on the SoC. A dedicated pair of inbound and outbound mailboxes is > implemented for each subsystem/external execution environment which needs to > communicate with TMEL for security services. The inbound mailboxes are used to > send IPC requests to TMEL, which are then processed by TMEL firmware and > accordingly the responses are sent to the requestor via outbound mailboxes. > > It is an IPC transport protocol which is light weight and supports a subset of > API's. It handles link initialization, negotiation, establishment and > communication across client(APPSS/BTSS/AUDIOSS) and server(TMEL SS). > > ----------------------------------------------- --------------------------------------------------- > | | | | > | SOC CLIENT | SOC | TMEL SS | Fix alignment for last character in above line. > | | AHB | | > | ---------- --------- --------- | | ------ ------- -------- ------------ | > | | | | | | | | WO | | | R | | | | |SERVICES | | > | | APPS |<-->| TMEL |<->| |------------->| | IN |-->| | | TMEL | |-------- | | > | | | | COM | | QMP | | RO | | | W | QMP |<--->| COM |<-->| a) ATTEST | | > | | | | | | |<-------------| | OUT |<--| | | | | b) CRYPTO | | > | | | | | | | | | | | | | | | | .. more | | > | --------- --------- --------- | | ------ ------- ------- ------------ | > | | | | > ----------------------------------------------- -------------------------------------------------- > > This binding describes the component responsible for communication between the > TMEL server based subsystems (Q6) and the TMEL client (APPSS/BTSS/AUDIOSS), > used for security services like secure image authentication, enable/disable > efuses, crypto services. Each client in the SoC has its own block of message > RAM and IRQ for communication with the TMEL SS. > > Signed-off-by: Sricharan Ramabadhran <quic_srichara@xxxxxxxxxxx> > --- > [V2] Added HW description as per comments. > Removed the fallback compatible. > Fixed naming convention to TME-L in all places. > Fixed indendation for example. > Removed the 'description' for some items. > > .../bindings/mailbox/qcom,tmel-qmp.yaml | 65 +++++++++++++++++++ > 1 file changed, 65 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mailbox/qcom,tmel-qmp.yaml > > diff --git a/Documentation/devicetree/bindings/mailbox/qcom,tmel-qmp.yaml b/Documentation/devicetree/bindings/mailbox/qcom,tmel-qmp.yaml > new file mode 100644 > index 000000000000..a434359e0a2c > --- /dev/null > +++ b/Documentation/devicetree/bindings/mailbox/qcom,tmel-qmp.yaml > @@ -0,0 +1,65 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/mailbox/qcom,tmel-qmp.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Qualcomm TMEL IPCC channel > + > +maintainers: > + - Sricharan Ramabadhran <quic_srichara@xxxxxxxxxxx> > + > +description: > + TMEL SS provides different kinds of services like secureboot, remote image > + authentication, key management, crypto, OEM provisioning etc. This patch adds > + support for remote image authentication. Support for rest of the services can > + be added. > + > + The QMP mailbox is the primary means of communication between TMEL SS and > + other subsystem on the SoC. A dedicated pair of inbound and outbound mailboxes > + is implemented for each subsystem/external execution environment which needs to > + communicate with TMEL for security services. The inbound mailboxes are used to > + send IPC requests to TMEL, which are then processed by TMEL firmware and > + accordingly the responses are sent to the requestor via outbound mailboxes. > + > +properties: > + compatible: > + items: > + - enum: > + - qcom,ipq5424-tmel-qmp > + > + reg: > + maxItems: 1 > + > + interrupts: > + maxItems: 1 > + > + mboxes: > + maxItems: 1 > + > + "#mbox-cells": > + const: 2 > + description: > + The first cell is the client-id, and the second cell is the signal-id. > + > +required: > + - compatible > + - reg > + - interrupts > + - mboxes Should 'mbox-cells' also be a required property? Since tmel_qmp_parse_devicetree -> mbox_request_channel seems to expect it. -Varada > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/arm-gic.h> > + > + tmel_qmp: mailbox@32090000 { > + compatible = "qcom,ipq5424-tmel-qmp"; > + reg = <0x32090000 0x2000>; > + interrupts = <GIC_SPI 126 IRQ_TYPE_EDGE_RISING>; > + mboxes = <&apcs_glb 20>; > + #mbox-cells = <2>; > + }; > + > +... > -- > 2.34.1 > >
