arm_scmi/transports/optee.c

32 	 * PTA_SCMI_CMD_PROCESS_SMT_CHANNEL - Process SCMI message in SMT buffer
36 	 * Shared memory used for SCMI message/response exhange is expected
37 	 * already identified and bound to channel handle in both SCMI agent
38 	 * and SCMI server (OP-TEE) parts.
39 	 * The memory uses SMT header to carry SCMI meta-data (protocol ID and
45 	 * PTA_SCMI_CMD_PROCESS_SMT_CHANNEL_MESSAGE - Process SMT/SCMI message
48 	 * [in/out] memref[1]: Message/response buffer (SMT and SCMI payload)
50 	 * Shared memory used for SCMI message/response is a SMT buffer
53 	 * The memory uses SMT header to carry SCMI meta-data (protocol ID and
61 	 * SCMI shm information are 0 if agent expects to use OP-TEE regular SHM
70 	 * PTA_SCMI_CMD_PROCESS_MSG_CHANNEL - Process SCMI message in a MSG
74 	 * [in]     memref[1]: Message buffer (MSG and SCMI payload)
75 	 * [out]    memref[2]: Response buffer (MSG and SCMI payload)
77 	 * Shared memories used for SCMI message/response are MSG buffers
79 	 * uses a 32bit header to carry SCMI meta-data (protocol ID and
80 	 * protocol message ID) followed by the effective SCMI message
87  * OP-TEE SCMI service capabilities bit flags (32bit)
90  * When set, OP-TEE supports command using SMT header protocol (SCMI shmem) in
91  * shared memory buffers to carry SCMI protocol synchronisation information.
95  * shared memory to carry SCMI protocol synchronisation information and SCMI
105  * struct scmi_optee_channel - Description of an OP-TEE SCMI channel
109  * @caps: OP-TEE SCMI channel capabilities
112  * @cinfo: SCMI channel information
113  * @req: union for SCMI interface
115  * @req.msg: Shared memory protocol handle for SCMI request and
154 /* There can be only 1 SCMI service in OP-TEE we connect to */
157 /* Open a session toward SCMI OP-TEE service with REE_KERNEL identity */
214 		dev_err(agent->dev, "OP-TEE SCMI PTA doesn't support SMT and MSG\n");  in get_capabilities()
251 	/* From now on use channel identifer provided by OP-TEE SCMI service */  in get_channel()
522 	{ .compatible = "linaro,scmi-optee" },
535 	/* Only one SCMI OP-TEE device allowed */  in scmi_optee_service_probe()
537 		dev_err(dev, "An SCMI OP-TEE device was already initialized: only one allowed\n");  in scmi_optee_service_probe()
611 		.name = "scmi-optee",
631 MODULE_DESCRIPTION("SCMI OPTEE Transport driver");