309  * accessing those.  If those change on a BMC, a new BMC is allocated.
313 	struct list_head       intfs; /* Interfaces on this BMC. */
328 static int bmc_get_device_id(struct ipmi_smi *intf, struct bmc_device *bmc,
463 	 * interface is used by being looked up through the BMC
469 	struct bmc_device *bmc;  member
547 	 * The event receiver for my BMC, only really used at panic
621  * This mutex keeps us from adding the same BMC twice.
2386 			msg->msg.data, msg->msg.data_len, &intf->bmc->fetch_id);  in bmc_device_id_handler()
2390 		intf->bmc->cc = msg->msg.data[0];  in bmc_device_id_handler()
2391 		intf->bmc->dyn_id_set = 0;  in bmc_device_id_handler()
2398 		intf->bmc->dyn_id_set = 1;  in bmc_device_id_handler()
2433 static int __get_device_id(struct ipmi_smi *intf, struct bmc_device *bmc)  in __get_device_id()  argument
2441 	bmc->cc = 0;  in __get_device_id()
2442 	bmc->dyn_id_set = 2;  in __get_device_id()
2448 	wait_event(intf->waitq, bmc->dyn_id_set != 2);  in __get_device_id()
2450 	if (!bmc->dyn_id_set) {  in __get_device_id()
2451 		if ((bmc->cc == IPMI_DEVICE_IN_FW_UPDATE_ERR  in __get_device_id()
2452 		     || bmc->cc ==  IPMI_DEVICE_IN_INIT_ERR  in __get_device_id()
2453 		     || bmc->cc ==  IPMI_NOT_IN_MY_STATE_ERR)  in __get_device_id()
2457 			    "BMC returned 0x%2.2x, retry get bmc device id\n",  in __get_device_id()
2458 			    bmc->cc);  in __get_device_id()
2475  * Fetch the device id for the bmc/interface.  You must pass in either
2476  * bmc or intf, this code will get the other one.  If the data has
2483 static int __bmc_get_device_id(struct ipmi_smi *intf, struct bmc_device *bmc,  in __bmc_get_device_id()  argument
2492 		mutex_lock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2494 		if (list_empty(&bmc->intfs)) {  in __bmc_get_device_id()
2495 			mutex_unlock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2498 		intf = list_first_entry(&bmc->intfs, struct ipmi_smi,  in __bmc_get_device_id()
2501 		mutex_unlock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2503 		mutex_lock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2504 		if (intf != list_first_entry(&bmc->intfs, struct ipmi_smi,  in __bmc_get_device_id()
2512 		bmc = intf->bmc;  in __bmc_get_device_id()
2513 		mutex_lock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2519 	    (bmc->dyn_id_set && time_is_after_jiffies(bmc->dyn_id_expiry)))  in __bmc_get_device_id()
2522 	prev_guid_set = bmc->dyn_guid_set;  in __bmc_get_device_id()
2525 	prev_dyn_id_set = bmc->dyn_id_set;  in __bmc_get_device_id()
2526 	rv = __get_device_id(intf, bmc);  in __bmc_get_device_id()
2532 	 * not change on a BMC.  If it does we have to do some dancing.  in __bmc_get_device_id()
2535 	    || (!prev_guid_set && bmc->dyn_guid_set)  in __bmc_get_device_id()
2536 	    || (!prev_dyn_id_set && bmc->dyn_id_set)  in __bmc_get_device_id()
2537 	    || (prev_guid_set && bmc->dyn_guid_set  in __bmc_get_device_id()
2538 		&& !guid_equal(&bmc->guid, &bmc->fetch_guid))  in __bmc_get_device_id()
2539 	    || bmc->id.device_id != bmc->fetch_id.device_id  in __bmc_get_device_id()
2540 	    || bmc->id.manufacturer_id != bmc->fetch_id.manufacturer_id  in __bmc_get_device_id()
2541 	    || bmc->id.product_id != bmc->fetch_id.product_id) {  in __bmc_get_device_id()
2542 		struct ipmi_device_id id = bmc->fetch_id;  in __bmc_get_device_id()
2543 		int guid_set = bmc->dyn_guid_set;  in __bmc_get_device_id()
2546 		guid = bmc->fetch_guid;  in __bmc_get_device_id()
2547 		mutex_unlock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2550 		/* Fill in the temporary BMC for good measure. */  in __bmc_get_device_id()
2551 		intf->bmc->id = id;  in __bmc_get_device_id()
2552 		intf->bmc->dyn_guid_set = guid_set;  in __bmc_get_device_id()
2553 		intf->bmc->guid = guid;  in __bmc_get_device_id()
2564 			 * the next interface for the BMC.  in __bmc_get_device_id()
2567 			mutex_lock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2571 		/* We have a new BMC, set it up. */  in __bmc_get_device_id()
2572 		bmc = intf->bmc;  in __bmc_get_device_id()
2573 		mutex_lock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2575 	} else if (memcmp(&bmc->fetch_id, &bmc->id, sizeof(bmc->id)))  in __bmc_get_device_id()
2577 		__scan_channels(intf, &bmc->fetch_id);  in __bmc_get_device_id()
2579 	bmc->dyn_id_expiry = jiffies + IPMI_DYN_DEV_ID_EXPIRY;  in __bmc_get_device_id()
2584 		bmc->dyn_id_set = prev_dyn_id_set;  in __bmc_get_device_id()
2587 		bmc->id = bmc->fetch_id;  in __bmc_get_device_id()
2588 		if (bmc->dyn_guid_set)  in __bmc_get_device_id()
2589 			bmc->guid = bmc->fetch_guid;  in __bmc_get_device_id()
2595 			bmc->dyn_guid_set = prev_guid_set;  in __bmc_get_device_id()
2600 			*id = bmc->id;  in __bmc_get_device_id()
2603 			*guid_set = bmc->dyn_guid_set;  in __bmc_get_device_id()
2605 		if (guid && bmc->dyn_guid_set)  in __bmc_get_device_id()
2606 			*guid =  bmc->guid;  in __bmc_get_device_id()
2609 	mutex_unlock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2616 static int bmc_get_device_id(struct ipmi_smi *intf, struct bmc_device *bmc,  in bmc_get_device_id()  argument
2620 	return __bmc_get_device_id(intf, bmc, id, guid_set, guid, -1);  in bmc_get_device_id()
2627 	struct bmc_device *bmc = to_bmc_device(dev);  in device_id_show()  local
2631 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in device_id_show()
2643 	struct bmc_device *bmc = to_bmc_device(dev);  in provides_device_sdrs_show()  local
2647 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in provides_device_sdrs_show()
2658 	struct bmc_device *bmc = to_bmc_device(dev);  in revision_show()  local
2662 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in revision_show()
2674 	struct bmc_device *bmc = to_bmc_device(dev);  in firmware_revision_show()  local
2678 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in firmware_revision_show()
2691 	struct bmc_device *bmc = to_bmc_device(dev);  in ipmi_version_show()  local
2695 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in ipmi_version_show()
2709 	struct bmc_device *bmc = to_bmc_device(dev);  in add_dev_support_show()  local
2713 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in add_dev_support_show()
2726 	struct bmc_device *bmc = to_bmc_device(dev);  in manufacturer_id_show()  local
2730 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in manufacturer_id_show()
2742 	struct bmc_device *bmc = to_bmc_device(dev);  in product_id_show()  local
2746 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in product_id_show()
2758 	struct bmc_device *bmc = to_bmc_device(dev);  in aux_firmware_rev_show()  local
2762 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in aux_firmware_rev_show()
2777 	struct bmc_device *bmc = to_bmc_device(dev);  in guid_show()  local
2782 	rv = bmc_get_device_id(NULL, bmc, NULL, &guid_set, &guid);  in guid_show()
2810 	struct bmc_device *bmc = to_bmc_device(dev);  in bmc_dev_attr_is_visible()  local
2817 		rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in bmc_dev_attr_is_visible()
2823 		rv = bmc_get_device_id(NULL, bmc, NULL, &guid_set, NULL);  in bmc_dev_attr_is_visible()
2846 	struct bmc_device *bmc;  in __find_bmc_guid()  local
2852 	bmc = to_bmc_device(dev);  in __find_bmc_guid()
2853 	rv = bmc->dyn_guid_set && guid_equal(&bmc->guid, guid);  in __find_bmc_guid()
2855 		rv = kref_get_unless_zero(&bmc->usecount);  in __find_bmc_guid()
2860  * Returns with the bmc's usecount incremented, if it is non-NULL.
2866 	struct bmc_device *bmc = NULL;  in ipmi_find_bmc_guid()  local
2870 		bmc = to_bmc_device(dev);  in ipmi_find_bmc_guid()
2873 	return bmc;  in ipmi_find_bmc_guid()
2884 	struct bmc_device *bmc;  in __find_bmc_prod_dev_id()  local
2890 	bmc = to_bmc_device(dev);  in __find_bmc_prod_dev_id()
2891 	rv = (bmc->id.product_id == cid->product_id  in __find_bmc_prod_dev_id()
2892 	      && bmc->id.device_id == cid->device_id);  in __find_bmc_prod_dev_id()
2894 		rv = kref_get_unless_zero(&bmc->usecount);  in __find_bmc_prod_dev_id()
2899  * Returns with the bmc's usecount incremented, if it is non-NULL.
2910 	struct bmc_device *bmc = NULL;  in ipmi_find_bmc_prod_dev_id()  local
2914 		bmc = to_bmc_device(dev);  in ipmi_find_bmc_prod_dev_id()
2917 	return bmc;  in ipmi_find_bmc_prod_dev_id()
2930 	struct bmc_device *bmc = container_of(work, struct bmc_device,  in cleanup_bmc_work()  local
2932 	int id = bmc->pdev.id; /* Unregister overwrites id */  in cleanup_bmc_work()
2934 	platform_device_unregister(&bmc->pdev);  in cleanup_bmc_work()
2941 	struct bmc_device *bmc = container_of(ref, struct bmc_device, usecount);  in cleanup_bmc_device()  local
2948 	queue_work(remove_work_wq, &bmc->remove_work);  in cleanup_bmc_device()
2956 	struct bmc_device *bmc = intf->bmc;  in __ipmi_bmc_unregister()  local
2961 	sysfs_remove_link(&intf->si_dev->kobj, "bmc");  in __ipmi_bmc_unregister()
2962 	sysfs_remove_link(&bmc->pdev.dev.kobj, intf->my_dev_name);  in __ipmi_bmc_unregister()
2966 	mutex_lock(&bmc->dyn_mutex);  in __ipmi_bmc_unregister()
2968 	mutex_unlock(&bmc->dyn_mutex);  in __ipmi_bmc_unregister()
2969 	intf->bmc = &intf->tmp_bmc;  in __ipmi_bmc_unregister()
2970 	kref_put(&bmc->usecount, cleanup_bmc_device);  in __ipmi_bmc_unregister()
2989 	struct bmc_device *bmc;  in __ipmi_bmc_register()  local
3003 	 * representing the interfaced BMC already  in __ipmi_bmc_register()
3015 	 * otherwise register the new BMC device  in __ipmi_bmc_register()
3018 		bmc = old_bmc;  in __ipmi_bmc_register()
3021 		 * the BMC find functions.  in __ipmi_bmc_register()
3023 		intf->bmc = old_bmc;  in __ipmi_bmc_register()
3024 		mutex_lock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3025 		list_add_tail(&intf->bmc_link, &bmc->intfs);  in __ipmi_bmc_register()
3026 		mutex_unlock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3029 			 "interfacing existing BMC (man_id: 0x%6.6x, prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",  in __ipmi_bmc_register()
3030 			 bmc->id.manufacturer_id,  in __ipmi_bmc_register()
3031 			 bmc->id.product_id,  in __ipmi_bmc_register()
3032 			 bmc->id.device_id);  in __ipmi_bmc_register()
3034 		bmc = kzalloc(sizeof(*bmc), GFP_KERNEL);  in __ipmi_bmc_register()
3035 		if (!bmc) {  in __ipmi_bmc_register()
3039 		INIT_LIST_HEAD(&bmc->intfs);  in __ipmi_bmc_register()
3040 		mutex_init(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3041 		INIT_WORK(&bmc->remove_work, cleanup_bmc_work);  in __ipmi_bmc_register()
3043 		bmc->id = *id;  in __ipmi_bmc_register()
3044 		bmc->dyn_id_set = 1;  in __ipmi_bmc_register()
3045 		bmc->dyn_guid_set = guid_set;  in __ipmi_bmc_register()
3046 		bmc->guid = *guid;  in __ipmi_bmc_register()
3047 		bmc->dyn_id_expiry = jiffies + IPMI_DYN_DEV_ID_EXPIRY;  in __ipmi_bmc_register()
3049 		bmc->pdev.name = "ipmi_bmc";  in __ipmi_bmc_register()
3053 			kfree(bmc);  in __ipmi_bmc_register()
3057 		bmc->pdev.dev.driver = &ipmidriver.driver;  in __ipmi_bmc_register()
3058 		bmc->pdev.id = rv;  in __ipmi_bmc_register()
3059 		bmc->pdev.dev.release = release_bmc_device;  in __ipmi_bmc_register()
3060 		bmc->pdev.dev.type = &bmc_device_type;  in __ipmi_bmc_register()
3061 		kref_init(&bmc->usecount);  in __ipmi_bmc_register()
3063 		intf->bmc = bmc;  in __ipmi_bmc_register()
3064 		mutex_lock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3065 		list_add_tail(&intf->bmc_link, &bmc->intfs);  in __ipmi_bmc_register()
3066 		mutex_unlock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3068 		rv = platform_device_register(&bmc->pdev);  in __ipmi_bmc_register()
3071 				"Unable to register bmc device: %d\n",  in __ipmi_bmc_register()
3077 			 "Found new BMC (man_id: 0x%6.6x, prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",  in __ipmi_bmc_register()
3078 			 bmc->id.manufacturer_id,  in __ipmi_bmc_register()
3079 			 bmc->id.product_id,  in __ipmi_bmc_register()
3080 			 bmc->id.device_id);  in __ipmi_bmc_register()
3084 	 * create symlink from system interface device to bmc device  in __ipmi_bmc_register()
3087 	rv = sysfs_create_link(&intf->si_dev->kobj, &bmc->pdev.dev.kobj, "bmc");  in __ipmi_bmc_register()
3089 		dev_err(intf->si_dev, "Unable to create bmc symlink: %d\n", rv);  in __ipmi_bmc_register()
3098 		dev_err(intf->si_dev, "Unable to allocate link from BMC: %d\n",  in __ipmi_bmc_register()
3103 	rv = sysfs_create_link(&bmc->pdev.dev.kobj, &intf->si_dev->kobj,  in __ipmi_bmc_register()
3106 		dev_err(intf->si_dev, "Unable to create symlink to bmc: %d\n",  in __ipmi_bmc_register()
3125 	sysfs_remove_link(&intf->si_dev->kobj, "bmc");  in __ipmi_bmc_register()
3128 	mutex_lock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3130 	mutex_unlock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3131 	intf->bmc = &intf->tmp_bmc;  in __ipmi_bmc_register()
3132 	kref_put(&bmc->usecount, cleanup_bmc_device);  in __ipmi_bmc_register()
3136 	mutex_lock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3138 	mutex_unlock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3139 	intf->bmc = &intf->tmp_bmc;  in __ipmi_bmc_register()
3140 	put_device(&bmc->pdev.dev);  in __ipmi_bmc_register()
3174 	struct bmc_device *bmc = intf->bmc;  in guid_handler()  local
3183 		/* Error from getting the GUID, the BMC doesn't have one. */  in guid_handler()
3184 		bmc->dyn_guid_set = 0;  in guid_handler()
3189 		bmc->dyn_guid_set = 0;  in guid_handler()
3191 …"The GUID response from the BMC was too short, it was %d but should have been %d.  Assuming GUID i…  in guid_handler()
3196 	import_guid(&bmc->fetch_guid, msg->msg.data + 1);  in guid_handler()
3202 	bmc->dyn_guid_set = 1;  in guid_handler()
3210 	struct bmc_device *bmc = intf->bmc;  in __get_guid()  local
3212 	bmc->dyn_guid_set = 2;  in __get_guid()
3217 		bmc->dyn_guid_set = 0;  in __get_guid()
3219 		wait_event(intf->waitq, bmc->dyn_guid_set != 2);  in __get_guid()
3430 	intf->bmc = &intf->tmp_bmc;  in ipmi_add_smi()
3431 	INIT_LIST_HEAD(&intf->bmc->intfs);  in ipmi_add_smi()
3432 	mutex_init(&intf->bmc->dyn_mutex);  in ipmi_add_smi()
4290 			 "BMC returned too small a message for netfn %x cmd %x, got %d bytes\n",  in handle_one_recv_msg()
4305 			 "BMC returned incorrect response, expected netfn %x cmd %x, got netfn %x cmd %x\n",  in handle_one_recv_msg()
4423 		/* It's a response from the local BMC. */  in handle_one_recv_msg()