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
120  * struct scmi_info - Structure representing a SCMI instance
125  * @version: SCMI revision information containing protocol version,
127  * @handle: Instance of SCMI handle to send to clients
133  *	       this SCMI instance: populated on protocol's first attempted
143  *		      Only SCMI synchronous commands reported by the platform
146  *		      decision is finally left up to the SCMI drivers.
150  * @bus_nb: A notifier to listen for device bind/unbind on the scmi bus
151  * @dev_req_nb: A notifier to listen for device request/unrequest on the scmi
153  * @devreq_mtx: A mutex to serialize device creation for this SCMI instance
155  * @raw: An opaque reference handle used by SCMI Raw mode.
194 		pr_warn("SCMI Protocol 0x%x not found!\n", protocol_id);  in scmi_protocol_get()
198 	pr_debug("Found SCMI Protocol 0x%x\n", protocol_id);  in scmi_protocol_get()
231 		pr_err("unable to allocate SCMI idr slot for 0x%x - err %d\n",  in scmi_protocol_register()
236 	pr_debug("Registered SCMI Protocol 0x%x\n", proto->id);  in scmi_protocol_register()
248 	pr_debug("Unregistered SCMI Protocol 0x%x\n", proto->id);  in scmi_protocol_unregister()
254  * this SCMI instance.
257  * @info: The SCMI instance descriptor
476  * @handle: Pointer to SCMI entity handle
517  * @handle: Pointer to SCMI entity handle
567  * @handle: Pointer to SCMI entity handle
589  * @handle: Pointer to SCMI entity handle
592  * Note that in a regular SCMI stack, usually, a protocol has to be defined in
652  * @handle: Pointer to SCMI entity handle
703  * SCMI transport can deliver such out-of-order responses.
971  * @cinfo: SCMI channel info
1002  * @ph: Pointer to SCMI protocol handle
1106  * @cinfo: SCMI channel info
1133  * @cinfo: SCMI channel info
1158  * @ph: Pointer to SCMI protocol handle
1250  * @ph: Pointer to SCMI protocol handle
1305  * @ph: Pointer to SCMI protocol handle
1361  * version_get() - command to get the revision of the SCMI entity
1363  * @ph: Pointer to SCMI protocol handle
1366  * Updates the SCMI information in the internal data structure.
1762  * A helper to grab the version memory area reference during SCMI Base protocol
1765  * Return: A reference to the version memory area associated to the SCMI
1779  * @info: The reference to the related SCMI instance.
1783  * description, against the specified SCMI instance @info, and initialize it;
1860  * @handle: A reference to the SCMI platform instance.
1899  * @handle: A reference to the SCMI platform instance.
1902  * Register a new user for the requested protocol on the specified SCMI
1914  * @handle: A reference to the SCMI platform instance.
2025  * released, and possibly de-initialized on last user, once the SCMI driver
2060  * released, and possibly de-initialized on last user, once the SCMI driver
2107  * SCMI instance is configured as atomic.
2109  * @handle: A reference to the SCMI platform instance.
2130  * scmi_handle_get() - Get the SCMI handle for a device
2132  * @dev: pointer to device for which we want SCMI handle
2135  * and is expected to be maintained by caller of SCMI protocol library.
2166  * and is expected to be maintained by caller of SCMI protocol library.
2361 			"unable to allocate SCMI idr slot err %d\n", ret);  in scmi_chan_setup()
2394  * @info: The SCMI instance descriptor.
2398  * borrowing devices from the SCMI drivers; this way channels are initialized
2399  * upfront during core SCMI stack probing and are no more coupled with SCMI
2400  * devices used by SCMI drivers.
2481 	/* Skip transport devices and devices of different SCMI instances */  in scmi_bus_notifier()
2632 				 "SCMI RAW - Error enumerating channels\n");  in scmi_debugfs_raw_mode_setup()
2646 		dev_err(info->dev, "Failed to initialize SCMI RAW Mode !\n");  in scmi_debugfs_raw_mode_setup()
2701 			 "SCMI System wide atomic threshold set to %d us\n",  in scmi_probe()
2732 			dev_warn(dev, "Failed to setup SCMI debugfs.\n");  in scmi_probe()
2745 			dev_info(dev, "SCMI RAW Mode COEX enabled !\n");  in scmi_probe()
2750 		dev_err(dev, "SCMI Notifications NOT available.\n");  in scmi_probe()
2758 	 * Trigger SCMI Base protocol initialization.  in scmi_probe()
2760 	 * SCMI stack is shutdown/unloaded as a whole.  in scmi_probe()
2764 		dev_err(dev, "unable to communicate with SCMI\n");  in scmi_probe()
2784 			dev_err(dev, "SCMI protocol %d not implemented\n",  in scmi_probe()
2791 		 * @active_protocols for this SCMI instance/  in scmi_probe()
2796 			dev_err(dev, "SCMI protocol %d already activated. Skip\n",  in scmi_probe()
2835 			 "Still active SCMI users will be forcibly unbound.\n");  in scmi_remove()
2910 	{ .compatible = "arm,scmi", .data = &scmi_mailbox_desc },
2913 	{ .compatible = "linaro,scmi-optee", .data = &scmi_optee_desc },
2916 	{ .compatible = "arm,scmi-smc", .data = &scmi_smc_desc},
2917 	{ .compatible = "arm,scmi-smc-param", .data = &scmi_smc_desc},
2920 	{ .compatible = "arm,scmi-virtio", .data = &scmi_virtio_desc},
2929 		   .name = "arm-scmi",
2967 			pr_err("SCMI transport %s FAILED initialization!\n",  in __scmi_transports_setup()
2990 	d = debugfs_create_dir("scmi", NULL);  in scmi_debugfs_init()
2992 		pr_err("Could NOT create SCMI top dentry.\n");  in scmi_debugfs_init()
3003 	/* Bail out if no SCMI transport was configured */  in scmi_driver_init()
3051 MODULE_ALIAS("platform:arm-scmi");
3053 MODULE_DESCRIPTION("ARM SCMI protocol driver");