295  * accessing those.  If those change on a BMC, a new BMC is allocated.
299 	struct list_head       intfs; /* Interfaces on this BMC. */
314 static int bmc_get_device_id(struct ipmi_smi *intf, struct bmc_device *bmc,
449 	 * interface is used by being looked up through the BMC
455 	struct bmc_device *bmc;  member
533 	 * The event receiver for my BMC, only really used at panic
607  * This mutex keeps us from adding the same BMC twice.
2373 			msg->msg.data, msg->msg.data_len, &intf->bmc->fetch_id);  in bmc_device_id_handler()
2377 		intf->bmc->cc = msg->msg.data[0];  in bmc_device_id_handler()
2378 		intf->bmc->dyn_id_set = 0;  in bmc_device_id_handler()
2385 		intf->bmc->dyn_id_set = 1;  in bmc_device_id_handler()
2420 static int __get_device_id(struct ipmi_smi *intf, struct bmc_device *bmc)  in __get_device_id()  argument
2428 	bmc->cc = 0;  in __get_device_id()
2429 	bmc->dyn_id_set = 2;  in __get_device_id()
2435 	wait_event(intf->waitq, bmc->dyn_id_set != 2);  in __get_device_id()
2437 	if (!bmc->dyn_id_set) {  in __get_device_id()
2438 		if (bmc->cc != IPMI_CC_NO_ERROR &&  in __get_device_id()
2442 			    "BMC returned 0x%2.2x, retry get bmc device id\n",  in __get_device_id()
2443 			    bmc->cc);  in __get_device_id()
2460  * Fetch the device id for the bmc/interface.  You must pass in either
2461  * bmc or intf, this code will get the other one.  If the data has
2468 static int __bmc_get_device_id(struct ipmi_smi *intf, struct bmc_device *bmc,  in __bmc_get_device_id()  argument
2477 		mutex_lock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2479 		if (list_empty(&bmc->intfs)) {  in __bmc_get_device_id()
2480 			mutex_unlock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2483 		intf = list_first_entry(&bmc->intfs, struct ipmi_smi,  in __bmc_get_device_id()
2486 		mutex_unlock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2488 		mutex_lock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2489 		if (intf != list_first_entry(&bmc->intfs, struct ipmi_smi,  in __bmc_get_device_id()
2497 		bmc = intf->bmc;  in __bmc_get_device_id()
2498 		mutex_lock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2504 	    (bmc->dyn_id_set && time_is_after_jiffies(bmc->dyn_id_expiry)))  in __bmc_get_device_id()
2507 	prev_guid_set = bmc->dyn_guid_set;  in __bmc_get_device_id()
2510 	prev_dyn_id_set = bmc->dyn_id_set;  in __bmc_get_device_id()
2511 	rv = __get_device_id(intf, bmc);  in __bmc_get_device_id()
2517 	 * not change on a BMC.  If it does we have to do some dancing.  in __bmc_get_device_id()
2520 	    || (!prev_guid_set && bmc->dyn_guid_set)  in __bmc_get_device_id()
2521 	    || (!prev_dyn_id_set && bmc->dyn_id_set)  in __bmc_get_device_id()
2522 	    || (prev_guid_set && bmc->dyn_guid_set  in __bmc_get_device_id()
2523 		&& !guid_equal(&bmc->guid, &bmc->fetch_guid))  in __bmc_get_device_id()
2524 	    || bmc->id.device_id != bmc->fetch_id.device_id  in __bmc_get_device_id()
2525 	    || bmc->id.manufacturer_id != bmc->fetch_id.manufacturer_id  in __bmc_get_device_id()
2526 	    || bmc->id.product_id != bmc->fetch_id.product_id) {  in __bmc_get_device_id()
2527 		struct ipmi_device_id id = bmc->fetch_id;  in __bmc_get_device_id()
2528 		int guid_set = bmc->dyn_guid_set;  in __bmc_get_device_id()
2531 		guid = bmc->fetch_guid;  in __bmc_get_device_id()
2532 		mutex_unlock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2535 		/* Fill in the temporary BMC for good measure. */  in __bmc_get_device_id()
2536 		intf->bmc->id = id;  in __bmc_get_device_id()
2537 		intf->bmc->dyn_guid_set = guid_set;  in __bmc_get_device_id()
2538 		intf->bmc->guid = guid;  in __bmc_get_device_id()
2549 			 * the next interface for the BMC.  in __bmc_get_device_id()
2552 			mutex_lock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2556 		/* We have a new BMC, set it up. */  in __bmc_get_device_id()
2557 		bmc = intf->bmc;  in __bmc_get_device_id()
2558 		mutex_lock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2560 	} else if (memcmp(&bmc->fetch_id, &bmc->id, sizeof(bmc->id)))  in __bmc_get_device_id()
2562 		__scan_channels(intf, &bmc->fetch_id);  in __bmc_get_device_id()
2564 	bmc->dyn_id_expiry = jiffies + IPMI_DYN_DEV_ID_EXPIRY;  in __bmc_get_device_id()
2569 		bmc->dyn_id_set = prev_dyn_id_set;  in __bmc_get_device_id()
2572 		bmc->id = bmc->fetch_id;  in __bmc_get_device_id()
2573 		if (bmc->dyn_guid_set)  in __bmc_get_device_id()
2574 			bmc->guid = bmc->fetch_guid;  in __bmc_get_device_id()
2580 			bmc->dyn_guid_set = prev_guid_set;  in __bmc_get_device_id()
2585 			*id = bmc->id;  in __bmc_get_device_id()
2588 			*guid_set = bmc->dyn_guid_set;  in __bmc_get_device_id()
2590 		if (guid && bmc->dyn_guid_set)  in __bmc_get_device_id()
2591 			*guid =  bmc->guid;  in __bmc_get_device_id()
2594 	mutex_unlock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2601 static int bmc_get_device_id(struct ipmi_smi *intf, struct bmc_device *bmc,  in bmc_get_device_id()  argument
2605 	return __bmc_get_device_id(intf, bmc, id, guid_set, guid, -1);  in bmc_get_device_id()
2612 	struct bmc_device *bmc = to_bmc_device(dev);  in device_id_show()  local
2616 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in device_id_show()
2628 	struct bmc_device *bmc = to_bmc_device(dev);  in provides_device_sdrs_show()  local
2632 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in provides_device_sdrs_show()
2643 	struct bmc_device *bmc = to_bmc_device(dev);  in revision_show()  local
2647 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in revision_show()
2659 	struct bmc_device *bmc = to_bmc_device(dev);  in firmware_revision_show()  local
2663 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in firmware_revision_show()
2676 	struct bmc_device *bmc = to_bmc_device(dev);  in ipmi_version_show()  local
2680 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in ipmi_version_show()
2694 	struct bmc_device *bmc = to_bmc_device(dev);  in add_dev_support_show()  local
2698 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in add_dev_support_show()
2711 	struct bmc_device *bmc = to_bmc_device(dev);  in manufacturer_id_show()  local
2715 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in manufacturer_id_show()
2727 	struct bmc_device *bmc = to_bmc_device(dev);  in product_id_show()  local
2731 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in product_id_show()
2743 	struct bmc_device *bmc = to_bmc_device(dev);  in aux_firmware_rev_show()  local
2747 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in aux_firmware_rev_show()
2762 	struct bmc_device *bmc = to_bmc_device(dev);  in guid_show()  local
2767 	rv = bmc_get_device_id(NULL, bmc, NULL, &guid_set, &guid);  in guid_show()
2795 	struct bmc_device *bmc = to_bmc_device(dev);  in bmc_dev_attr_is_visible()  local
2802 		rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in bmc_dev_attr_is_visible()
2808 		rv = bmc_get_device_id(NULL, bmc, NULL, &guid_set, NULL);  in bmc_dev_attr_is_visible()
2831 	struct bmc_device *bmc;  in __find_bmc_guid()  local
2837 	bmc = to_bmc_device(dev);  in __find_bmc_guid()
2838 	rv = bmc->dyn_guid_set && guid_equal(&bmc->guid, guid);  in __find_bmc_guid()
2840 		rv = kref_get_unless_zero(&bmc->usecount);  in __find_bmc_guid()
2845  * Returns with the bmc's usecount incremented, if it is non-NULL.
2851 	struct bmc_device *bmc = NULL;  in ipmi_find_bmc_guid()  local
2855 		bmc = to_bmc_device(dev);  in ipmi_find_bmc_guid()
2858 	return bmc;  in ipmi_find_bmc_guid()
2869 	struct bmc_device *bmc;  in __find_bmc_prod_dev_id()  local
2875 	bmc = to_bmc_device(dev);  in __find_bmc_prod_dev_id()
2876 	rv = (bmc->id.product_id == cid->product_id  in __find_bmc_prod_dev_id()
2877 	      && bmc->id.device_id == cid->device_id);  in __find_bmc_prod_dev_id()
2879 		rv = kref_get_unless_zero(&bmc->usecount);  in __find_bmc_prod_dev_id()
2884  * Returns with the bmc's usecount incremented, if it is non-NULL.
2895 	struct bmc_device *bmc = NULL;  in ipmi_find_bmc_prod_dev_id()  local
2899 		bmc = to_bmc_device(dev);  in ipmi_find_bmc_prod_dev_id()
2902 	return bmc;  in ipmi_find_bmc_prod_dev_id()
2915 	struct bmc_device *bmc = container_of(work, struct bmc_device,  in cleanup_bmc_work()  local
2917 	int id = bmc->pdev.id; /* Unregister overwrites id */  in cleanup_bmc_work()
2919 	platform_device_unregister(&bmc->pdev);  in cleanup_bmc_work()
2926 	struct bmc_device *bmc = container_of(ref, struct bmc_device, usecount);  in cleanup_bmc_device()  local
2933 	schedule_work(&bmc->remove_work);  in cleanup_bmc_device()
2941 	struct bmc_device *bmc = intf->bmc;  in __ipmi_bmc_unregister()  local
2946 	sysfs_remove_link(&intf->si_dev->kobj, "bmc");  in __ipmi_bmc_unregister()
2947 	sysfs_remove_link(&bmc->pdev.dev.kobj, intf->my_dev_name);  in __ipmi_bmc_unregister()
2951 	mutex_lock(&bmc->dyn_mutex);  in __ipmi_bmc_unregister()
2953 	mutex_unlock(&bmc->dyn_mutex);  in __ipmi_bmc_unregister()
2954 	intf->bmc = &intf->tmp_bmc;  in __ipmi_bmc_unregister()
2955 	kref_put(&bmc->usecount, cleanup_bmc_device);  in __ipmi_bmc_unregister()
2974 	struct bmc_device *bmc;  in __ipmi_bmc_register()  local
2988 	 * representing the interfaced BMC already  in __ipmi_bmc_register()
3000 	 * otherwise register the new BMC device  in __ipmi_bmc_register()
3003 		bmc = old_bmc;  in __ipmi_bmc_register()
3006 		 * the BMC find functions.  in __ipmi_bmc_register()
3008 		intf->bmc = old_bmc;  in __ipmi_bmc_register()
3009 		mutex_lock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3010 		list_add_tail(&intf->bmc_link, &bmc->intfs);  in __ipmi_bmc_register()
3011 		mutex_unlock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3014 			 "interfacing existing BMC (man_id: 0x%6.6x, prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",  in __ipmi_bmc_register()
3015 			 bmc->id.manufacturer_id,  in __ipmi_bmc_register()
3016 			 bmc->id.product_id,  in __ipmi_bmc_register()
3017 			 bmc->id.device_id);  in __ipmi_bmc_register()
3019 		bmc = kzalloc(sizeof(*bmc), GFP_KERNEL);  in __ipmi_bmc_register()
3020 		if (!bmc) {  in __ipmi_bmc_register()
3024 		INIT_LIST_HEAD(&bmc->intfs);  in __ipmi_bmc_register()
3025 		mutex_init(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3026 		INIT_WORK(&bmc->remove_work, cleanup_bmc_work);  in __ipmi_bmc_register()
3028 		bmc->id = *id;  in __ipmi_bmc_register()
3029 		bmc->dyn_id_set = 1;  in __ipmi_bmc_register()
3030 		bmc->dyn_guid_set = guid_set;  in __ipmi_bmc_register()
3031 		bmc->guid = *guid;  in __ipmi_bmc_register()
3032 		bmc->dyn_id_expiry = jiffies + IPMI_DYN_DEV_ID_EXPIRY;  in __ipmi_bmc_register()
3034 		bmc->pdev.name = "ipmi_bmc";  in __ipmi_bmc_register()
3038 			kfree(bmc);  in __ipmi_bmc_register()
3042 		bmc->pdev.dev.driver = &ipmidriver.driver;  in __ipmi_bmc_register()
3043 		bmc->pdev.id = rv;  in __ipmi_bmc_register()
3044 		bmc->pdev.dev.release = release_bmc_device;  in __ipmi_bmc_register()
3045 		bmc->pdev.dev.type = &bmc_device_type;  in __ipmi_bmc_register()
3046 		kref_init(&bmc->usecount);  in __ipmi_bmc_register()
3048 		intf->bmc = bmc;  in __ipmi_bmc_register()
3049 		mutex_lock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3050 		list_add_tail(&intf->bmc_link, &bmc->intfs);  in __ipmi_bmc_register()
3051 		mutex_unlock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3053 		rv = platform_device_register(&bmc->pdev);  in __ipmi_bmc_register()
3056 				"Unable to register bmc device: %d\n",  in __ipmi_bmc_register()
3062 			 "Found new BMC (man_id: 0x%6.6x, prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",  in __ipmi_bmc_register()
3063 			 bmc->id.manufacturer_id,  in __ipmi_bmc_register()
3064 			 bmc->id.product_id,  in __ipmi_bmc_register()
3065 			 bmc->id.device_id);  in __ipmi_bmc_register()
3069 	 * create symlink from system interface device to bmc device  in __ipmi_bmc_register()
3072 	rv = sysfs_create_link(&intf->si_dev->kobj, &bmc->pdev.dev.kobj, "bmc");  in __ipmi_bmc_register()
3074 		dev_err(intf->si_dev, "Unable to create bmc symlink: %d\n", rv);  in __ipmi_bmc_register()
3083 		dev_err(intf->si_dev, "Unable to allocate link from BMC: %d\n",  in __ipmi_bmc_register()
3088 	rv = sysfs_create_link(&bmc->pdev.dev.kobj, &intf->si_dev->kobj,  in __ipmi_bmc_register()
3091 		dev_err(intf->si_dev, "Unable to create symlink to bmc: %d\n",  in __ipmi_bmc_register()
3110 	sysfs_remove_link(&intf->si_dev->kobj, "bmc");  in __ipmi_bmc_register()
3113 	mutex_lock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3115 	mutex_unlock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3116 	intf->bmc = &intf->tmp_bmc;  in __ipmi_bmc_register()
3117 	kref_put(&bmc->usecount, cleanup_bmc_device);  in __ipmi_bmc_register()
3121 	mutex_lock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3123 	mutex_unlock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3124 	intf->bmc = &intf->tmp_bmc;  in __ipmi_bmc_register()
3125 	put_device(&bmc->pdev.dev);  in __ipmi_bmc_register()
3159 	struct bmc_device *bmc = intf->bmc;  in guid_handler()  local
3168 		/* Error from getting the GUID, the BMC doesn't have one. */  in guid_handler()
3169 		bmc->dyn_guid_set = 0;  in guid_handler()
3174 		bmc->dyn_guid_set = 0;  in guid_handler()
3176 …"The GUID response from the BMC was too short, it was %d but should have been %d.  Assuming GUID i…  in guid_handler()
3181 	import_guid(&bmc->fetch_guid, msg->msg.data + 1);  in guid_handler()
3187 	bmc->dyn_guid_set = 1;  in guid_handler()
3195 	struct bmc_device *bmc = intf->bmc;  in __get_guid()  local
3197 	bmc->dyn_guid_set = 2;  in __get_guid()
3202 		bmc->dyn_guid_set = 0;  in __get_guid()
3204 		wait_event(intf->waitq, bmc->dyn_guid_set != 2);  in __get_guid()
3415 	intf->bmc = &intf->tmp_bmc;  in ipmi_add_smi()
3416 	INIT_LIST_HEAD(&intf->bmc->intfs);  in ipmi_add_smi()
3417 	mutex_init(&intf->bmc->dyn_mutex);  in ipmi_add_smi()
4275 			 "BMC returned too small a message for netfn %x cmd %x, got %d bytes\n",  in handle_one_recv_msg()
4290 			 "BMC returned incorrect response, expected netfn %x cmd %x, got netfn %x cmd %x\n",  in handle_one_recv_msg()
4408 		/* It's a response from the local BMC. */  in handle_one_recv_msg()