311  * accessing those.  If those change on a BMC, a new BMC is allocated.
315 	struct list_head       intfs; /* Interfaces on this BMC. */
330 static int bmc_get_device_id(struct ipmi_smi *intf, struct bmc_device *bmc,
469 	 * interface is used by being looked up through the BMC
475 	struct bmc_device *bmc;  member
553 	 * The event receiver for my BMC, only really used at panic
627  * This mutex keeps us from adding the same BMC twice.
2502 		intf->bmc->dyn_id_set = 0;  in bmc_device_id_handler()
2507 			msg->msg.data, msg->msg.data_len, &intf->bmc->fetch_id);  in bmc_device_id_handler()
2511 		intf->bmc->cc = msg->msg.data[0];  in bmc_device_id_handler()
2512 		intf->bmc->dyn_id_set = 0;  in bmc_device_id_handler()
2519 		intf->bmc->dyn_id_set = 1;  in bmc_device_id_handler()
2554 static int __get_device_id(struct ipmi_smi *intf, struct bmc_device *bmc)  in __get_device_id()  argument
2562 	bmc->cc = 0;  in __get_device_id()
2563 	bmc->dyn_id_set = 2;  in __get_device_id()
2569 	wait_event(intf->waitq, bmc->dyn_id_set != 2);  in __get_device_id()
2571 	if (!bmc->dyn_id_set) {  in __get_device_id()
2572 		if (bmc->cc != IPMI_CC_NO_ERROR &&  in __get_device_id()
2576 			    "BMC returned 0x%2.2x, retry get bmc device id\n",  in __get_device_id()
2577 			    bmc->cc);  in __get_device_id()
2594  * Fetch the device id for the bmc/interface.  You must pass in either
2595  * bmc or intf, this code will get the other one.  If the data has
2602 static int __bmc_get_device_id(struct ipmi_smi *intf, struct bmc_device *bmc,  in __bmc_get_device_id()  argument
2611 		mutex_lock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2613 		if (list_empty(&bmc->intfs)) {  in __bmc_get_device_id()
2614 			mutex_unlock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2617 		intf = list_first_entry(&bmc->intfs, struct ipmi_smi,  in __bmc_get_device_id()
2620 		mutex_unlock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2622 		mutex_lock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2623 		if (intf != list_first_entry(&bmc->intfs, struct ipmi_smi,  in __bmc_get_device_id()
2631 		bmc = intf->bmc;  in __bmc_get_device_id()
2632 		mutex_lock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2638 	    (bmc->dyn_id_set && time_is_after_jiffies(bmc->dyn_id_expiry)))  in __bmc_get_device_id()
2641 	prev_guid_set = bmc->dyn_guid_set;  in __bmc_get_device_id()
2644 	prev_dyn_id_set = bmc->dyn_id_set;  in __bmc_get_device_id()
2645 	rv = __get_device_id(intf, bmc);  in __bmc_get_device_id()
2651 	 * not change on a BMC.  If it does we have to do some dancing.  in __bmc_get_device_id()
2654 	    || (!prev_guid_set && bmc->dyn_guid_set)  in __bmc_get_device_id()
2655 	    || (!prev_dyn_id_set && bmc->dyn_id_set)  in __bmc_get_device_id()
2656 	    || (prev_guid_set && bmc->dyn_guid_set  in __bmc_get_device_id()
2657 		&& !guid_equal(&bmc->guid, &bmc->fetch_guid))  in __bmc_get_device_id()
2658 	    || bmc->id.device_id != bmc->fetch_id.device_id  in __bmc_get_device_id()
2659 	    || bmc->id.manufacturer_id != bmc->fetch_id.manufacturer_id  in __bmc_get_device_id()
2660 	    || bmc->id.product_id != bmc->fetch_id.product_id) {  in __bmc_get_device_id()
2661 		struct ipmi_device_id id = bmc->fetch_id;  in __bmc_get_device_id()
2662 		int guid_set = bmc->dyn_guid_set;  in __bmc_get_device_id()
2665 		guid = bmc->fetch_guid;  in __bmc_get_device_id()
2666 		mutex_unlock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2669 		/* Fill in the temporary BMC for good measure. */  in __bmc_get_device_id()
2670 		intf->bmc->id = id;  in __bmc_get_device_id()
2671 		intf->bmc->dyn_guid_set = guid_set;  in __bmc_get_device_id()
2672 		intf->bmc->guid = guid;  in __bmc_get_device_id()
2683 			 * the next interface for the BMC.  in __bmc_get_device_id()
2686 			mutex_lock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2690 		/* We have a new BMC, set it up. */  in __bmc_get_device_id()
2691 		bmc = intf->bmc;  in __bmc_get_device_id()
2692 		mutex_lock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2694 	} else if (memcmp(&bmc->fetch_id, &bmc->id, sizeof(bmc->id)))  in __bmc_get_device_id()
2696 		__scan_channels(intf, &bmc->fetch_id);  in __bmc_get_device_id()
2698 	bmc->dyn_id_expiry = jiffies + IPMI_DYN_DEV_ID_EXPIRY;  in __bmc_get_device_id()
2703 		bmc->dyn_id_set = prev_dyn_id_set;  in __bmc_get_device_id()
2706 		bmc->id = bmc->fetch_id;  in __bmc_get_device_id()
2707 		if (bmc->dyn_guid_set)  in __bmc_get_device_id()
2708 			bmc->guid = bmc->fetch_guid;  in __bmc_get_device_id()
2714 			bmc->dyn_guid_set = prev_guid_set;  in __bmc_get_device_id()
2719 			*id = bmc->id;  in __bmc_get_device_id()
2722 			*guid_set = bmc->dyn_guid_set;  in __bmc_get_device_id()
2724 		if (guid && bmc->dyn_guid_set)  in __bmc_get_device_id()
2725 			*guid =  bmc->guid;  in __bmc_get_device_id()
2728 	mutex_unlock(&bmc->dyn_mutex);  in __bmc_get_device_id()
2735 static int bmc_get_device_id(struct ipmi_smi *intf, struct bmc_device *bmc,  in bmc_get_device_id()  argument
2739 	return __bmc_get_device_id(intf, bmc, id, guid_set, guid, -1);  in bmc_get_device_id()
2746 	struct bmc_device *bmc = to_bmc_device(dev);  in device_id_show()  local
2750 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in device_id_show()
2762 	struct bmc_device *bmc = to_bmc_device(dev);  in provides_device_sdrs_show()  local
2766 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in provides_device_sdrs_show()
2777 	struct bmc_device *bmc = to_bmc_device(dev);  in revision_show()  local
2781 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in revision_show()
2793 	struct bmc_device *bmc = to_bmc_device(dev);  in firmware_revision_show()  local
2797 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in firmware_revision_show()
2810 	struct bmc_device *bmc = to_bmc_device(dev);  in ipmi_version_show()  local
2814 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in ipmi_version_show()
2828 	struct bmc_device *bmc = to_bmc_device(dev);  in add_dev_support_show()  local
2832 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in add_dev_support_show()
2845 	struct bmc_device *bmc = to_bmc_device(dev);  in manufacturer_id_show()  local
2849 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in manufacturer_id_show()
2861 	struct bmc_device *bmc = to_bmc_device(dev);  in product_id_show()  local
2865 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in product_id_show()
2877 	struct bmc_device *bmc = to_bmc_device(dev);  in aux_firmware_rev_show()  local
2881 	rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in aux_firmware_rev_show()
2896 	struct bmc_device *bmc = to_bmc_device(dev);  in guid_show()  local
2901 	rv = bmc_get_device_id(NULL, bmc, NULL, &guid_set, &guid);  in guid_show()
2929 	struct bmc_device *bmc = to_bmc_device(dev);  in bmc_dev_attr_is_visible()  local
2936 		rv = bmc_get_device_id(NULL, bmc, &id, NULL, NULL);  in bmc_dev_attr_is_visible()
2942 		rv = bmc_get_device_id(NULL, bmc, NULL, &guid_set, NULL);  in bmc_dev_attr_is_visible()
2965 	struct bmc_device *bmc;  in __find_bmc_guid()  local
2971 	bmc = to_bmc_device(dev);  in __find_bmc_guid()
2972 	rv = bmc->dyn_guid_set && guid_equal(&bmc->guid, guid);  in __find_bmc_guid()
2974 		rv = kref_get_unless_zero(&bmc->usecount);  in __find_bmc_guid()
2979  * Returns with the bmc's usecount incremented, if it is non-NULL.
2985 	struct bmc_device *bmc = NULL;  in ipmi_find_bmc_guid()  local
2989 		bmc = to_bmc_device(dev);  in ipmi_find_bmc_guid()
2992 	return bmc;  in ipmi_find_bmc_guid()
3003 	struct bmc_device *bmc;  in __find_bmc_prod_dev_id()  local
3009 	bmc = to_bmc_device(dev);  in __find_bmc_prod_dev_id()
3010 	rv = (bmc->id.product_id == cid->product_id  in __find_bmc_prod_dev_id()
3011 	      && bmc->id.device_id == cid->device_id);  in __find_bmc_prod_dev_id()
3013 		rv = kref_get_unless_zero(&bmc->usecount);  in __find_bmc_prod_dev_id()
3018  * Returns with the bmc's usecount incremented, if it is non-NULL.
3029 	struct bmc_device *bmc = NULL;  in ipmi_find_bmc_prod_dev_id()  local
3033 		bmc = to_bmc_device(dev);  in ipmi_find_bmc_prod_dev_id()
3036 	return bmc;  in ipmi_find_bmc_prod_dev_id()
3049 	struct bmc_device *bmc = container_of(work, struct bmc_device,  in cleanup_bmc_work()  local
3051 	int id = bmc->pdev.id; /* Unregister overwrites id */  in cleanup_bmc_work()
3053 	platform_device_unregister(&bmc->pdev);  in cleanup_bmc_work()
3060 	struct bmc_device *bmc = container_of(ref, struct bmc_device, usecount);  in cleanup_bmc_device()  local
3067 	queue_work(remove_work_wq, &bmc->remove_work);  in cleanup_bmc_device()
3075 	struct bmc_device *bmc = intf->bmc;  in __ipmi_bmc_unregister()  local
3080 	sysfs_remove_link(&intf->si_dev->kobj, "bmc");  in __ipmi_bmc_unregister()
3081 	sysfs_remove_link(&bmc->pdev.dev.kobj, intf->my_dev_name);  in __ipmi_bmc_unregister()
3085 	mutex_lock(&bmc->dyn_mutex);  in __ipmi_bmc_unregister()
3087 	mutex_unlock(&bmc->dyn_mutex);  in __ipmi_bmc_unregister()
3088 	intf->bmc = &intf->tmp_bmc;  in __ipmi_bmc_unregister()
3089 	kref_put(&bmc->usecount, cleanup_bmc_device);  in __ipmi_bmc_unregister()
3108 	struct bmc_device *bmc;  in __ipmi_bmc_register()  local
3122 	 * representing the interfaced BMC already  in __ipmi_bmc_register()
3134 	 * otherwise register the new BMC device  in __ipmi_bmc_register()
3137 		bmc = old_bmc;  in __ipmi_bmc_register()
3140 		 * the BMC find functions.  in __ipmi_bmc_register()
3142 		intf->bmc = old_bmc;  in __ipmi_bmc_register()
3143 		mutex_lock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3144 		list_add_tail(&intf->bmc_link, &bmc->intfs);  in __ipmi_bmc_register()
3145 		mutex_unlock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3148 			 "interfacing existing BMC (man_id: 0x%6.6x, prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",  in __ipmi_bmc_register()
3149 			 bmc->id.manufacturer_id,  in __ipmi_bmc_register()
3150 			 bmc->id.product_id,  in __ipmi_bmc_register()
3151 			 bmc->id.device_id);  in __ipmi_bmc_register()
3153 		bmc = kzalloc(sizeof(*bmc), GFP_KERNEL);  in __ipmi_bmc_register()
3154 		if (!bmc) {  in __ipmi_bmc_register()
3158 		INIT_LIST_HEAD(&bmc->intfs);  in __ipmi_bmc_register()
3159 		mutex_init(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3160 		INIT_WORK(&bmc->remove_work, cleanup_bmc_work);  in __ipmi_bmc_register()
3162 		bmc->id = *id;  in __ipmi_bmc_register()
3163 		bmc->dyn_id_set = 1;  in __ipmi_bmc_register()
3164 		bmc->dyn_guid_set = guid_set;  in __ipmi_bmc_register()
3165 		bmc->guid = *guid;  in __ipmi_bmc_register()
3166 		bmc->dyn_id_expiry = jiffies + IPMI_DYN_DEV_ID_EXPIRY;  in __ipmi_bmc_register()
3168 		bmc->pdev.name = "ipmi_bmc";  in __ipmi_bmc_register()
3172 			kfree(bmc);  in __ipmi_bmc_register()
3176 		bmc->pdev.dev.driver = &ipmidriver.driver;  in __ipmi_bmc_register()
3177 		bmc->pdev.id = rv;  in __ipmi_bmc_register()
3178 		bmc->pdev.dev.release = release_bmc_device;  in __ipmi_bmc_register()
3179 		bmc->pdev.dev.type = &bmc_device_type;  in __ipmi_bmc_register()
3180 		kref_init(&bmc->usecount);  in __ipmi_bmc_register()
3182 		intf->bmc = bmc;  in __ipmi_bmc_register()
3183 		mutex_lock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3184 		list_add_tail(&intf->bmc_link, &bmc->intfs);  in __ipmi_bmc_register()
3185 		mutex_unlock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3187 		rv = platform_device_register(&bmc->pdev);  in __ipmi_bmc_register()
3190 				"Unable to register bmc device: %d\n",  in __ipmi_bmc_register()
3196 			 "Found new BMC (man_id: 0x%6.6x, prod_id: 0x%4.4x, dev_id: 0x%2.2x)\n",  in __ipmi_bmc_register()
3197 			 bmc->id.manufacturer_id,  in __ipmi_bmc_register()
3198 			 bmc->id.product_id,  in __ipmi_bmc_register()
3199 			 bmc->id.device_id);  in __ipmi_bmc_register()
3203 	 * create symlink from system interface device to bmc device  in __ipmi_bmc_register()
3206 	rv = sysfs_create_link(&intf->si_dev->kobj, &bmc->pdev.dev.kobj, "bmc");  in __ipmi_bmc_register()
3208 		dev_err(intf->si_dev, "Unable to create bmc symlink: %d\n", rv);  in __ipmi_bmc_register()
3217 		dev_err(intf->si_dev, "Unable to allocate link from BMC: %d\n",  in __ipmi_bmc_register()
3222 	rv = sysfs_create_link(&bmc->pdev.dev.kobj, &intf->si_dev->kobj,  in __ipmi_bmc_register()
3225 		dev_err(intf->si_dev, "Unable to create symlink to bmc: %d\n",  in __ipmi_bmc_register()
3244 	sysfs_remove_link(&intf->si_dev->kobj, "bmc");  in __ipmi_bmc_register()
3247 	mutex_lock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3249 	mutex_unlock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3250 	intf->bmc = &intf->tmp_bmc;  in __ipmi_bmc_register()
3251 	kref_put(&bmc->usecount, cleanup_bmc_device);  in __ipmi_bmc_register()
3255 	mutex_lock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3257 	mutex_unlock(&bmc->dyn_mutex);  in __ipmi_bmc_register()
3258 	intf->bmc = &intf->tmp_bmc;  in __ipmi_bmc_register()
3259 	put_device(&bmc->pdev.dev);  in __ipmi_bmc_register()
3293 	struct bmc_device *bmc = intf->bmc;  in guid_handler()  local
3302 		/* Error from getting the GUID, the BMC doesn't have one. */  in guid_handler()
3303 		bmc->dyn_guid_set = 0;  in guid_handler()
3308 		bmc->dyn_guid_set = 0;  in guid_handler()
3310 …"The GUID response from the BMC was too short, it was %d but should have been %d.  Assuming GUID i…  in guid_handler()
3315 	import_guid(&bmc->fetch_guid, msg->msg.data + 1);  in guid_handler()
3321 	bmc->dyn_guid_set = 1;  in guid_handler()
3329 	struct bmc_device *bmc = intf->bmc;  in __get_guid()  local
3331 	bmc->dyn_guid_set = 2;  in __get_guid()
3336 		bmc->dyn_guid_set = 0;  in __get_guid()
3338 		wait_event(intf->waitq, bmc->dyn_guid_set != 2);  in __get_guid()
3579 	intf->bmc = &intf->tmp_bmc;  in ipmi_add_smi()
3580 	INIT_LIST_HEAD(&intf->bmc->intfs);  in ipmi_add_smi()
3581 	mutex_init(&intf->bmc->dyn_mutex);  in ipmi_add_smi()
4540 			 "BMC returned too small a message for netfn %x cmd %x, got %d bytes\n",  in handle_one_recv_msg()
4618 			 "BMC returned incorrect response, expected netfn %x cmd %x, got netfn %x cmd %x\n",  in handle_one_recv_msg()
4743 		/* It's a response from the local BMC. */  in handle_one_recv_msg()