3  * System Control and Management Interface (SCMI) Message Protocol driver
5  * SCMI Message Protocol is used between the System Control Processor(SCP)
43 #include <trace/events/scmi.h>
50 /* List of all SCMI devices active in system */
83  * @handle: Reference to the SCMI handle associated to this protocol instance.
91  * Each protocol is initialized independently once for each SCMI platform in
92  * which is defined by DT and implemented by the SCMI server fw.
108  * @name: Name of this SCMI instance
109  * @type: Type of this SCMI instance
122  * struct scmi_info - Structure representing a SCMI instance
127  * @version: SCMI revision information containing protocol version,
129  * @handle: Instance of SCMI handle to send to clients
135  *	       this SCMI instance: populated on protocol's first attempted
145  *		      Only SCMI synchronous commands reported by the platform
148  *		      decision is finally left up to the SCMI drivers.
152  * @bus_nb: A notifier to listen for device bind/unbind on the scmi bus
153  * @dev_req_nb: A notifier to listen for device request/unrequest on the scmi
155  * @devreq_mtx: A mutex to serialize device creation for this SCMI instance
157  * @raw: An opaque reference handle used by SCMI Raw mode.
196 		pr_warn("SCMI Protocol 0x%x not found!\n", protocol_id);  in scmi_protocol_get()
200 	pr_debug("Found SCMI Protocol 0x%x\n", protocol_id);  in scmi_protocol_get()
233 		pr_err("unable to allocate SCMI idr slot for 0x%x - err %d\n",  in scmi_protocol_register()
238 	pr_debug("Registered SCMI Protocol 0x%x\n", proto->id);  in scmi_protocol_register()
250 	pr_debug("Unregistered SCMI Protocol 0x%x\n", proto->id);  in scmi_protocol_unregister()
256  * this SCMI instance.
259  * @info: The SCMI instance descriptor
478  * @handle: Pointer to SCMI entity handle
519  * @handle: Pointer to SCMI entity handle
569  * @handle: Pointer to SCMI entity handle
591  * @handle: Pointer to SCMI entity handle
594  * Note that in a regular SCMI stack, usually, a protocol has to be defined in
654  * @handle: Pointer to SCMI entity handle
744  * SCMI transport can deliver such out-of-order responses.
1033  * @cinfo: SCMI channel info
1065  * @ph: Pointer to SCMI protocol handle
1174  * @cinfo: SCMI channel info
1201  * @cinfo: SCMI channel info
1226  * @ph: Pointer to SCMI protocol handle
1324  * @ph: Pointer to SCMI protocol handle
1379  * @ph: Pointer to SCMI protocol handle
1435  * version_get() - command to get the revision of the SCMI entity
1437  * @ph: Pointer to SCMI protocol handle
1440  * Updates the SCMI information in the internal data structure.
1880  * A helper to grab the version memory area reference during SCMI Base protocol
1883  * Return: A reference to the version memory area associated to the SCMI
1897  * @info: The reference to the related SCMI instance.
1901  * description, against the specified SCMI instance @info, and initialize it;
1978  * @handle: A reference to the SCMI platform instance.
2017  * @handle: A reference to the SCMI platform instance.
2020  * Register a new user for the requested protocol on the specified SCMI
2032  * @handle: A reference to the SCMI platform instance.
2143  * released, and possibly de-initialized on last user, once the SCMI driver
2178  * released, and possibly de-initialized on last user, once the SCMI driver
2225  * SCMI instance is configured as atomic.
2227  * @handle: A reference to the SCMI platform instance.
2248  * scmi_handle_get() - Get the SCMI handle for a device
2250  * @dev: pointer to device for which we want SCMI handle
2253  * and is expected to be maintained by caller of SCMI protocol library.
2284  * and is expected to be maintained by caller of SCMI protocol library.
2480 			"unable to allocate SCMI idr slot err %d\n", ret);  in scmi_chan_setup()
2513  * @info: The SCMI instance descriptor.
2517  * borrowing devices from the SCMI drivers; this way channels are initialized
2518  * upfront during core SCMI stack probing and are no more coupled with SCMI
2519  * devices used by SCMI drivers.
2600 	/* Skip transport devices and devices of different SCMI instances */  in scmi_bus_notifier()
2749 				 "SCMI RAW - Error enumerating channels\n");  in scmi_debugfs_raw_mode_setup()
2763 		dev_err(info->dev, "Failed to initialize SCMI RAW Mode !\n");  in scmi_debugfs_raw_mode_setup()
2818 			 "SCMI System wide atomic threshold set to %d us\n",  in scmi_probe()
2849 			dev_warn(dev, "Failed to setup SCMI debugfs.\n");  in scmi_probe()
2862 			dev_info(dev, "SCMI RAW Mode COEX enabled !\n");  in scmi_probe()
2867 		dev_err(dev, "SCMI Notifications NOT available.\n");  in scmi_probe()
2875 	 * Trigger SCMI Base protocol initialization.  in scmi_probe()
2877 	 * SCMI stack is shutdown/unloaded as a whole.  in scmi_probe()
2881 		dev_err(dev, "unable to communicate with SCMI\n");  in scmi_probe()
2901 			dev_err(dev, "SCMI protocol %d not implemented\n",  in scmi_probe()
2908 		 * @active_protocols for this SCMI instance/  in scmi_probe()
2913 			dev_err(dev, "SCMI protocol %d already activated. Skip\n",  in scmi_probe()
2952 			 "Still active SCMI users will be forcibly unbound.\n");  in scmi_remove()
3027 	{ .compatible = "arm,scmi", .data = &scmi_mailbox_desc },
3030 	{ .compatible = "linaro,scmi-optee", .data = &scmi_optee_desc },
3033 	{ .compatible = "arm,scmi-smc", .data = &scmi_smc_desc},
3034 	{ .compatible = "arm,scmi-smc-param", .data = &scmi_smc_desc},
3037 	{ .compatible = "arm,scmi-virtio", .data = &scmi_virtio_desc},
3046 		   .name = "arm-scmi",
3084 			pr_err("SCMI transport %s FAILED initialization!\n",  in __scmi_transports_setup()
3107 	d = debugfs_create_dir("scmi", NULL);  in scmi_debugfs_init()
3109 		pr_err("Could NOT create SCMI top dentry.\n");  in scmi_debugfs_init()
3120 	/* Bail out if no SCMI transport was configured */  in scmi_driver_init()
3168 MODULE_ALIAS("platform:arm-scmi");
3170 MODULE_DESCRIPTION("ARM SCMI protocol driver");