firmware/arm_scmi/optee.c

31 	 * PTA_SCMI_CMD_PROCESS_SMT_CHANNEL - Process SCMI message in SMT buffer
35 	 * Shared memory used for SCMI message/response exhange is expected
36 	 * already identified and bound to channel handle in both SCMI agent
37 	 * and SCMI server (OP-TEE) parts.
38 	 * The memory uses SMT header to carry SCMI meta-data (protocol ID and
44 	 * PTA_SCMI_CMD_PROCESS_SMT_CHANNEL_MESSAGE - Process SMT/SCMI message
47 	 * [in/out] memref[1]: Message/response buffer (SMT and SCMI payload)
49 	 * Shared memory used for SCMI message/response is a SMT buffer
52 	 * The memory uses SMT header to carry SCMI meta-data (protocol ID and
60 	 * SCMI shm information are 0 if agent expects to use OP-TEE regular SHM
69 	 * PTA_SCMI_CMD_PROCESS_MSG_CHANNEL - Process SCMI message in a MSG
73 	 * [in]     memref[1]: Message buffer (MSG and SCMI payload)
74 	 * [out]    memref[2]: Response buffer (MSG and SCMI payload)
76 	 * Shared memories used for SCMI message/response are MSG buffers
78 	 * uses a 32bit header to carry SCMI meta-data (protocol ID and
79 	 * protocol message ID) followed by the effective SCMI message
86  * OP-TEE SCMI service capabilities bit flags (32bit)
89  * When set, OP-TEE supports command using SMT header protocol (SCMI shmem) in
90  * shared memory buffers to carry SCMI protocol synchronisation information.
94  * shared memory to carry SCMI protocol synchronisation information and SCMI
104  * struct scmi_optee_channel - Description of an OP-TEE SCMI channel
108  * @caps: OP-TEE SCMI channel capabilities
111  * @cinfo: SCMI channel information
113  * @req: Shared memory protocol handle for SCMI request and synchronous response
149 /* There can be only 1 SCMI service in OP-TEE we connect to */
155 /* Open a session toward SCMI OP-TEE service with REE_KERNEL identity */
212 		dev_err(agent->dev, "OP-TEE SCMI PTA doesn't support SMT and MSG\n");  in get_capabilities()
249 	/* From now on use channel identifer provided by OP-TEE SCMI service */  in get_channel()
375 	if (!of_device_is_compatible(np, "arm,scmi-shmem")) {  in setup_static_shmem()
382 		dev_err(dev, "Failed to get SCMI Tx shared memory\n");  in setup_static_shmem()
390 		dev_err(dev, "Failed to ioremap SCMI Tx shared memory\n");  in setup_static_shmem()
557 	/* Only one SCMI OP-TEE device allowed */  in scmi_optee_service_probe()
559 		dev_err(dev, "An SCMI OP-TEE device was already initialized: only one allowed\n");  in scmi_optee_service_probe()
625 		.name = "scmi-optee",