firmware/arm_scmi/driver.c

3  * System Control and Management Interface (SCMI) Message Protocol driver
5  * SCMI Message Protocol is used between the System Control Processor(SCP)
45 #include <trace/events/scmi.h>
47 #define SCMI_VENDOR_MODULE_ALIAS_FMT	"scmi-protocol-0x%02x-%s"
53 /* List of all SCMI devices active in system */
86  * @handle: Reference to the SCMI handle associated to this protocol instance.
101  * Each protocol is initialized independently once for each SCMI platform in
102  * which is defined by DT and implemented by the SCMI server fw.
120  * @name: Name of this SCMI instance
121  * @type: Type of this SCMI instance
134  * struct scmi_info - Structure representing a SCMI instance
139  * @version: SCMI revision information containing protocol version,
141  * @handle: Instance of SCMI handle to send to clients
147  *	       this SCMI instance: populated on protocol's first attempted
158  * @bus_nb: A notifier to listen for device bind/unbind on the scmi bus
159  * @dev_req_nb: A notifier to listen for device request/unrequest on the scmi
161  * @devreq_mtx: A mutex to serialize device creation for this SCMI instance
163  * @raw: An opaque reference handle used by SCMI Raw mode.
312 		pr_info("Loaded SCMI Vendor Protocol 0x%x - %s %s %X\n",  in scmi_vendor_protocol_get()
330 		pr_warn("SCMI Protocol 0x%x not found!\n", protocol_id);  in scmi_protocol_get()
334 	pr_debug("Found SCMI Protocol 0x%x\n", protocol_id);  in scmi_protocol_get()
398 		pr_err("unable to allocate SCMI protocol slot for 0x%x - err %d\n",  in scmi_protocol_register()
403 	pr_debug("Registered SCMI Protocol 0x%x - %s  %s  0x%08X\n",  in scmi_protocol_register()
423 	pr_debug("Unregistered SCMI Protocol 0x%x\n", proto->id);  in scmi_protocol_unregister()
429  * this SCMI instance.
432  * @info: The SCMI instance descriptor
651  * @handle: Pointer to SCMI entity handle
692  * @handle: Pointer to SCMI entity handle
742  * @handle: Pointer to SCMI entity handle
764  * @handle: Pointer to SCMI entity handle
767  * Note that in a regular SCMI stack, usually, a protocol has to be defined in
827  * @handle: Pointer to SCMI entity handle
917  * SCMI transport can deliver such out-of-order responses.
1205  * @cinfo: SCMI channel info
1238  * @ph: Pointer to SCMI protocol handle
1344  * @cinfo: SCMI channel info
1371  * @cinfo: SCMI channel info
1396  * @ph: Pointer to SCMI protocol handle
1494  * @ph: Pointer to SCMI protocol handle
1549  * @ph: Pointer to SCMI protocol handle
1605  * version_get() - command to get the revision of the SCMI entity
1607  * @ph: Pointer to SCMI protocol handle
1610  * Updates the SCMI information in the internal data structure.
2054  * A helper to grab the version memory area reference during SCMI Base protocol
2057  * Return: A reference to the version memory area associated to the SCMI
2109  * @info: The reference to the related SCMI instance.
2113  * description, against the specified SCMI instance @info, and initialize it;
2206  * @handle: A reference to the SCMI platform instance.
2245  * @handle: A reference to the SCMI platform instance.
2248  * Register a new user for the requested protocol on the specified SCMI
2260  * @handle: A reference to the SCMI platform instance.
2371  * released, and possibly de-initialized on last user, once the SCMI driver
2406  * released, and possibly de-initialized on last user, once the SCMI driver
2453  * SCMI instance is configured as atomic.
2455  * @handle: A reference to the SCMI platform instance.
2476  * scmi_handle_get() - Get the SCMI handle for a device
2478  * @dev: pointer to device for which we want SCMI handle
2481  * and is expected to be maintained by caller of SCMI protocol library.
2512  * and is expected to be maintained by caller of SCMI protocol library.
2709 			"unable to allocate SCMI idr slot err %d\n", ret);  in scmi_chan_setup()
2746  * @info: The SCMI instance descriptor.
2750  * borrowing devices from the SCMI drivers; this way channels are initialized
2751  * upfront during core SCMI stack probing and are no more coupled with SCMI
2752  * devices used by SCMI drivers.
2831 	/* Skip transport devices and devices of different SCMI instances */  in scmi_bus_notifier()
3032 				 "SCMI RAW - Error enumerating channels\n");  in scmi_debugfs_raw_mode_setup()
3046 		dev_err(info->dev, "Failed to initialize SCMI RAW Mode !\n");  in scmi_debugfs_raw_mode_setup()
3090 		 "SCMI max-rx-timeout: %dms / max-msg-size: %dbytes / max-msg: %d\n",  in scmi_transport_setup()
3098 			 "SCMI System wide atomic threshold set to %u us\n",  in scmi_transport_setup()
3181 			dev_warn(dev, "Failed to setup SCMI debugfs.\n");  in scmi_probe()
3194 			dev_info(dev, "SCMI RAW Mode COEX enabled !\n");  in scmi_probe()
3199 		dev_err(dev, "SCMI Notifications NOT available.\n");  in scmi_probe()
3207 	 * Trigger SCMI Base protocol initialization.  in scmi_probe()
3209 	 * SCMI stack is shutdown/unloaded as a whole.  in scmi_probe()
3213 		err_str = "unable to communicate with SCMI\n";  in scmi_probe()
3235 			dev_err(dev, "SCMI protocol %d not implemented\n",  in scmi_probe()
3242 		 * @active_protocols for this SCMI instance/  in scmi_probe()
3247 			dev_err(dev, "SCMI protocol %d already activated. Skip\n",  in scmi_probe()
3288 			 "Still active SCMI users will be forcibly unbound.\n");  in scmi_remove()
3360 		   .name = "arm-scmi",
3372 	d = debugfs_create_dir("scmi", NULL);  in scmi_debugfs_init()
3374 		pr_err("Could NOT create SCMI top dentry.\n");  in scmi_debugfs_init()
3383 	/* Bail out if no SCMI transport was configured */  in scmi_driver_init()
3432 MODULE_ALIAS("platform:arm-scmi");
3434 MODULE_DESCRIPTION("ARM SCMI protocol driver");