/* * Copyright (c) 2004 Topspin Communications. All rights reserved. * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include #include #include #include #include #include #include #include #include #include #include #include "core_priv.h" MODULE_AUTHOR("Roland Dreier"); MODULE_DESCRIPTION("core kernel InfiniBand API"); MODULE_LICENSE("Dual BSD/GPL"); struct ib_client_data { struct list_head list; struct ib_client *client; void * data; /* The device or client is going down. Do not call client or device * callbacks other than remove(). */ bool going_down; }; struct workqueue_struct *ib_comp_wq; struct workqueue_struct *ib_wq; EXPORT_SYMBOL_GPL(ib_wq); /* The device_list and client_list contain devices and clients after their * registration has completed, and the devices and clients are removed * during unregistration. */ static LIST_HEAD(device_list); static LIST_HEAD(client_list); /* * device_mutex and lists_rwsem protect access to both device_list and * client_list. device_mutex protects writer access by device and client * registration / de-registration. lists_rwsem protects reader access to * these lists. Iterators of these lists must lock it for read, while updates * to the lists must be done with a write lock. A special case is when the * device_mutex is locked. In this case locking the lists for read access is * not necessary as the device_mutex implies it. * * lists_rwsem also protects access to the client data list. */ static DEFINE_MUTEX(device_mutex); static DECLARE_RWSEM(lists_rwsem); static int ib_device_check_mandatory(struct ib_device *device) { #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x } static const struct { size_t offset; char *name; } mandatory_table[] = { IB_MANDATORY_FUNC(query_device), IB_MANDATORY_FUNC(query_port), IB_MANDATORY_FUNC(query_pkey), IB_MANDATORY_FUNC(query_gid), IB_MANDATORY_FUNC(alloc_pd), IB_MANDATORY_FUNC(dealloc_pd), IB_MANDATORY_FUNC(create_ah), IB_MANDATORY_FUNC(destroy_ah), IB_MANDATORY_FUNC(create_qp), IB_MANDATORY_FUNC(modify_qp), IB_MANDATORY_FUNC(destroy_qp), IB_MANDATORY_FUNC(post_send), IB_MANDATORY_FUNC(post_recv), IB_MANDATORY_FUNC(create_cq), IB_MANDATORY_FUNC(destroy_cq), IB_MANDATORY_FUNC(poll_cq), IB_MANDATORY_FUNC(req_notify_cq), IB_MANDATORY_FUNC(get_dma_mr), IB_MANDATORY_FUNC(dereg_mr), IB_MANDATORY_FUNC(get_port_immutable) }; int i; for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) { if (!*(void **) ((void *) device + mandatory_table[i].offset)) { pr_warn("Device %s is missing mandatory function %s\n", device->name, mandatory_table[i].name); return -EINVAL; } } return 0; } static struct ib_device *__ib_device_get_by_name(const char *name) { struct ib_device *device; list_for_each_entry(device, &device_list, core_list) if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX)) return device; return NULL; } static int alloc_name(char *name) { unsigned long *inuse; char buf[IB_DEVICE_NAME_MAX]; struct ib_device *device; int i; inuse = (unsigned long *) get_zeroed_page(GFP_KERNEL); if (!inuse) return -ENOMEM; list_for_each_entry(device, &device_list, core_list) { if (!sscanf(device->name, name, &i)) continue; if (i < 0 || i >= PAGE_SIZE * 8) continue; snprintf(buf, sizeof buf, name, i); if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX)) set_bit(i, inuse); } i = find_first_zero_bit(inuse, PAGE_SIZE * 8); free_page((unsigned long) inuse); snprintf(buf, sizeof buf, name, i); if (__ib_device_get_by_name(buf)) return -ENFILE; strlcpy(name, buf, IB_DEVICE_NAME_MAX); return 0; } static void ib_device_release(struct device *device) { struct ib_device *dev = container_of(device, struct ib_device, dev); ib_cache_release_one(dev); kfree(dev->port_immutable); kfree(dev); } static int ib_device_uevent(struct device *device, struct kobj_uevent_env *env) { struct ib_device *dev = container_of(device, struct ib_device, dev); if (add_uevent_var(env, "NAME=%s", dev->name)) return -ENOMEM; /* * It would be nice to pass the node GUID with the event... */ return 0; } static struct class ib_class = { .name = "infiniband", .dev_release = ib_device_release, .dev_uevent = ib_device_uevent, }; /** * ib_alloc_device - allocate an IB device struct * @size:size of structure to allocate * * Low-level drivers should use ib_alloc_device() to allocate &struct * ib_device. @size is the size of the structure to be allocated, * including any private data used by the low-level driver. * ib_dealloc_device() must be used to free structures allocated with * ib_alloc_device(). */ struct ib_device *ib_alloc_device(size_t size) { struct ib_device *device; if (WARN_ON(size < sizeof(struct ib_device))) return NULL; device = kzalloc(size, GFP_KERNEL); if (!device) return NULL; device->dev.class = &ib_class; device_initialize(&device->dev); dev_set_drvdata(&device->dev, device); INIT_LIST_HEAD(&device->event_handler_list); spin_lock_init(&device->event_handler_lock); spin_lock_init(&device->client_data_lock); INIT_LIST_HEAD(&device->client_data_list); INIT_LIST_HEAD(&device->port_list); return device; } EXPORT_SYMBOL(ib_alloc_device); /** * ib_dealloc_device - free an IB device struct * @device:structure to free * * Free a structure allocated with ib_alloc_device(). */ void ib_dealloc_device(struct ib_device *device) { WARN_ON(device->reg_state != IB_DEV_UNREGISTERED && device->reg_state != IB_DEV_UNINITIALIZED); kobject_put(&device->dev.kobj); } EXPORT_SYMBOL(ib_dealloc_device); static int add_client_context(struct ib_device *device, struct ib_client *client) { struct ib_client_data *context; unsigned long flags; context = kmalloc(sizeof *context, GFP_KERNEL); if (!context) { pr_warn("Couldn't allocate client context for %s/%s\n", device->name, client->name); return -ENOMEM; } context->client = client; context->data = NULL; context->going_down = false; down_write(&lists_rwsem); spin_lock_irqsave(&device->client_data_lock, flags); list_add(&context->list, &device->client_data_list); spin_unlock_irqrestore(&device->client_data_lock, flags); up_write(&lists_rwsem); return 0; } static int verify_immutable(const struct ib_device *dev, u8 port) { return WARN_ON(!rdma_cap_ib_mad(dev, port) && rdma_max_mad_size(dev, port) != 0); } static int read_port_immutable(struct ib_device *device) { int ret; u8 start_port = rdma_start_port(device); u8 end_port = rdma_end_port(device); u8 port; /** * device->port_immutable is indexed directly by the port number to make * access to this data as efficient as possible. * * Therefore port_immutable is declared as a 1 based array with * potential empty slots at the beginning. */ device->port_immutable = kzalloc(sizeof(*device->port_immutable) * (end_port + 1), GFP_KERNEL); if (!device->port_immutable) return -ENOMEM; for (port = start_port; port <= end_port; ++port) { ret = device->get_port_immutable(device, port, &device->port_immutable[port]); if (ret) return ret; if (verify_immutable(device, port)) return -EINVAL; } return 0; } /** * ib_register_device - Register an IB device with IB core * @device:Device to register * * Low-level drivers use ib_register_device() to register their * devices with the IB core. All registered clients will receive a * callback for each device that is added. @device must be allocated * with ib_alloc_device(). */ int ib_register_device(struct ib_device *device, int (*port_callback)(struct ib_device *, u8, struct kobject *)) { int ret; struct ib_client *client; struct ib_udata uhw = {.outlen = 0, .inlen = 0}; mutex_lock(&device_mutex); if (strchr(device->name, '%')) { ret = alloc_name(device->name); if (ret) goto out; } if (ib_device_check_mandatory(device)) { ret = -EINVAL; goto out; } ret = read_port_immutable(device); if (ret) { pr_warn("Couldn't create per port immutable data %s\n", device->name); goto out; } ret = ib_cache_setup_one(device); if (ret) { pr_warn("Couldn't set up InfiniBand P_Key/GID cache\n"); goto out; } memset(&device->attrs, 0, sizeof(device->attrs)); ret = device->query_device(device, &device->attrs, &uhw); if (ret) { pr_warn("Couldn't query the device attributes\n"); ib_cache_cleanup_one(device); goto out; } ret = ib_device_register_sysfs(device, port_callback); if (ret) { pr_warn("Couldn't register device %s with driver model\n", device->name); ib_cache_cleanup_one(device); goto out; } device->reg_state = IB_DEV_REGISTERED; list_for_each_entry(client, &client_list, list) if (client->add && !add_client_context(device, client)) client->add(device); down_write(&lists_rwsem); list_add_tail(&device->core_list, &device_list); up_write(&lists_rwsem); out: mutex_unlock(&device_mutex); return ret; } EXPORT_SYMBOL(ib_register_device); /** * ib_unregister_device - Unregister an IB device * @device:Device to unregister * * Unregister an IB device. All clients will receive a remove callback. */ void ib_unregister_device(struct ib_device *device) { struct ib_client_data *context, *tmp; unsigned long flags; mutex_lock(&device_mutex); down_write(&lists_rwsem); list_del(&device->core_list); spin_lock_irqsave(&device->client_data_lock, flags); list_for_each_entry_safe(context, tmp, &device->client_data_list, list) context->going_down = true; spin_unlock_irqrestore(&device->client_data_lock, flags); downgrade_write(&lists_rwsem); list_for_each_entry_safe(context, tmp, &device->client_data_list, list) { if (context->client->remove) context->client->remove(device, context->data); } up_read(&lists_rwsem); mutex_unlock(&device_mutex); ib_device_unregister_sysfs(device); ib_cache_cleanup_one(device); down_write(&lists_rwsem); spin_lock_irqsave(&device->client_data_lock, flags); list_for_each_entry_safe(context, tmp, &device->client_data_list, list) kfree(context); spin_unlock_irqrestore(&device->client_data_lock, flags); up_write(&lists_rwsem); device->reg_state = IB_DEV_UNREGISTERED; } EXPORT_SYMBOL(ib_unregister_device); /** * ib_register_client - Register an IB client * @client:Client to register * * Upper level users of the IB drivers can use ib_register_client() to * register callbacks for IB device addition and removal. When an IB * device is added, each registered client's add method will be called * (in the order the clients were registered), and when a device is * removed, each client's remove method will be called (in the reverse * order that clients were registered). In addition, when * ib_register_client() is called, the client will receive an add * callback for all devices already registered. */ int ib_register_client(struct ib_client *client) { struct ib_device *device; mutex_lock(&device_mutex); list_for_each_entry(device, &device_list, core_list) if (client->add && !add_client_context(device, client)) client->add(device); down_write(&lists_rwsem); list_add_tail(&client->list, &client_list); up_write(&lists_rwsem); mutex_unlock(&device_mutex); return 0; } EXPORT_SYMBOL(ib_register_client); /** * ib_unregister_client - Unregister an IB client * @client:Client to unregister * * Upper level users use ib_unregister_client() to remove their client * registration. When ib_unregister_client() is called, the client * will receive a remove callback for each IB device still registered. */ void ib_unregister_client(struct ib_client *client) { struct ib_client_data *context, *tmp; struct ib_device *device; unsigned long flags; mutex_lock(&device_mutex); down_write(&lists_rwsem); list_del(&client->list); up_write(&lists_rwsem); list_for_each_entry(device, &device_list, core_list) { struct ib_client_data *found_context = NULL; down_write(&lists_rwsem); spin_lock_irqsave(&device->client_data_lock, flags); list_for_each_entry_safe(context, tmp, &device->client_data_list, list) if (context->client == client) { context->going_down = true; found_context = context; break; } spin_unlock_irqrestore(&device->client_data_lock, flags); up_write(&lists_rwsem); if (client->remove) client->remove(device, found_context ? found_context->data : NULL); if (!found_context) { pr_warn("No client context found for %s/%s\n", device->name, client->name); continue; } down_write(&lists_rwsem); spin_lock_irqsave(&device->client_data_lock, flags); list_del(&found_context->list); kfree(found_context); spin_unlock_irqrestore(&device->client_data_lock, flags); up_write(&lists_rwsem); } mutex_unlock(&device_mutex); } EXPORT_SYMBOL(ib_unregister_client); /** * ib_get_client_data - Get IB client context * @device:Device to get context for * @client:Client to get context for * * ib_get_client_data() returns client context set with * ib_set_client_data(). */ void *ib_get_client_data(struct ib_device *device, struct ib_client *client) { struct ib_client_data *context; void *ret = NULL; unsigned long flags; spin_lock_irqsave(&device->client_data_lock, flags); list_for_each_entry(context, &device->client_data_list, list) if (context->client == client) { ret = context->data; break; } spin_unlock_irqrestore(&device->client_data_lock, flags); return ret; } EXPORT_SYMBOL(ib_get_client_data); /** * ib_set_client_data - Set IB client context * @device:Device to set context for * @client:Client to set context for * @data:Context to set * * ib_set_client_data() sets client context that can be retrieved with * ib_get_client_data(). */ void ib_set_client_data(struct ib_device *device, struct ib_client *client, void *data) { struct ib_client_data *context; unsigned long flags; spin_lock_irqsave(&device->client_data_lock, flags); list_for_each_entry(context, &device->client_data_list, list) if (context->client == client) { context->data = data; goto out; } pr_warn("No client context found for %s/%s\n", device->name, client->name); out: spin_unlock_irqrestore(&device->client_data_lock, flags); } EXPORT_SYMBOL(ib_set_client_data); /** * ib_register_event_handler - Register an IB event handler * @event_handler:Handler to register * * ib_register_event_handler() registers an event handler that will be * called back when asynchronous IB events occur (as defined in * chapter 11 of the InfiniBand Architecture Specification). This * callback may occur in interrupt context. */ int ib_register_event_handler (struct ib_event_handler *event_handler) { unsigned long flags; spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); list_add_tail(&event_handler->list, &event_handler->device->event_handler_list); spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); return 0; } EXPORT_SYMBOL(ib_register_event_handler); /** * ib_unregister_event_handler - Unregister an event handler * @event_handler:Handler to unregister * * Unregister an event handler registered with * ib_register_event_handler(). */ int ib_unregister_event_handler(struct ib_event_handler *event_handler) { unsigned long flags; spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); list_del(&event_handler->list); spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); return 0; } EXPORT_SYMBOL(ib_unregister_event_handler); /** * ib_dispatch_event - Dispatch an asynchronous event * @event:Event to dispatch * * Low-level drivers must call ib_dispatch_event() to dispatch the * event to all registered event handlers when an asynchronous event * occurs. */ void ib_dispatch_event(struct ib_event *event) { unsigned long flags; struct ib_event_handler *handler; spin_lock_irqsave(&event->device->event_handler_lock, flags); list_for_each_entry(handler, &event->device->event_handler_list, list) handler->handler(handler, event); spin_unlock_irqrestore(&event->device->event_handler_lock, flags); } EXPORT_SYMBOL(ib_dispatch_event); /** * ib_query_port - Query IB port attributes * @device:Device to query * @port_num:Port number to query * @port_attr:Port attributes * * ib_query_port() returns the attributes of a port through the * @port_attr pointer. */ int ib_query_port(struct ib_device *device, u8 port_num, struct ib_port_attr *port_attr) { union ib_gid gid; int err; if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) return -EINVAL; memset(port_attr, 0, sizeof(*port_attr)); err = device->query_port(device, port_num, port_attr); if (err || port_attr->subnet_prefix) return err; err = ib_query_gid(device, port_num, 0, &gid, NULL); if (err) return err; port_attr->subnet_prefix = be64_to_cpu(gid.global.subnet_prefix); return 0; } EXPORT_SYMBOL(ib_query_port); /** * ib_query_gid - Get GID table entry * @device:Device to query * @port_num:Port number to query * @index:GID table index to query * @gid:Returned GID * @attr: Returned GID attributes related to this GID index (only in RoCE). * NULL means ignore. * * ib_query_gid() fetches the specified GID table entry. */ int ib_query_gid(struct ib_device *device, u8 port_num, int index, union ib_gid *gid, struct ib_gid_attr *attr) { if (rdma_cap_roce_gid_table(device, port_num)) return ib_get_cached_gid(device, port_num, index, gid, attr); if (attr) return -EINVAL; return device->query_gid(device, port_num, index, gid); } EXPORT_SYMBOL(ib_query_gid); /** * ib_enum_roce_netdev - enumerate all RoCE ports * @ib_dev : IB device we want to query * @filter: Should we call the callback? * @filter_cookie: Cookie passed to filter * @cb: Callback to call for each found RoCE ports * @cookie: Cookie passed back to the callback * * Enumerates all of the physical RoCE ports of ib_dev * which are related to netdevice and calls callback() on each * device for which filter() function returns non zero. */ void ib_enum_roce_netdev(struct ib_device *ib_dev, roce_netdev_filter filter, void *filter_cookie, roce_netdev_callback cb, void *cookie) { u8 port; for (port = rdma_start_port(ib_dev); port <= rdma_end_port(ib_dev); port++) if (rdma_protocol_roce(ib_dev, port)) { struct net_device *idev = NULL; if (ib_dev->get_netdev) idev = ib_dev->get_netdev(ib_dev, port); if (idev && idev->reg_state >= NETREG_UNREGISTERED) { dev_put(idev); idev = NULL; } if (filter(ib_dev, port, idev, filter_cookie)) cb(ib_dev, port, idev, cookie); if (idev) dev_put(idev); } } /** * ib_enum_all_roce_netdevs - enumerate all RoCE devices * @filter: Should we call the callback? * @filter_cookie: Cookie passed to filter * @cb: Callback to call for each found RoCE ports * @cookie: Cookie passed back to the callback * * Enumerates all RoCE devices' physical ports which are related * to netdevices and calls callback() on each device for which * filter() function returns non zero. */ void ib_enum_all_roce_netdevs(roce_netdev_filter filter, void *filter_cookie, roce_netdev_callback cb, void *cookie) { struct ib_device *dev; down_read(&lists_rwsem); list_for_each_entry(dev, &device_list, core_list) ib_enum_roce_netdev(dev, filter, filter_cookie, cb, cookie); up_read(&lists_rwsem); } /** * ib_query_pkey - Get P_Key table entry * @device:Device to query * @port_num:Port number to query * @index:P_Key table index to query * @pkey:Returned P_Key * * ib_query_pkey() fetches the specified P_Key table entry. */ int ib_query_pkey(struct ib_device *device, u8 port_num, u16 index, u16 *pkey) { return device->query_pkey(device, port_num, index, pkey); } EXPORT_SYMBOL(ib_query_pkey); /** * ib_modify_device - Change IB device attributes * @device:Device to modify * @device_modify_mask:Mask of attributes to change * @device_modify:New attribute values * * ib_modify_device() changes a device's attributes as specified by * the @device_modify_mask and @device_modify structure. */ int ib_modify_device(struct ib_device *device, int device_modify_mask, struct ib_device_modify *device_modify) { if (!device->modify_device) return -ENOSYS; return device->modify_device(device, device_modify_mask, device_modify); } EXPORT_SYMBOL(ib_modify_device); /** * ib_modify_port - Modifies the attributes for the specified port. * @device: The device to modify. * @port_num: The number of the port to modify. * @port_modify_mask: Mask used to specify which attributes of the port * to change. * @port_modify: New attribute values for the port. * * ib_modify_port() changes a port's attributes as specified by the * @port_modify_mask and @port_modify structure. */ int ib_modify_port(struct ib_device *device, u8 port_num, int port_modify_mask, struct ib_port_modify *port_modify) { if (!device->modify_port) return -ENOSYS; if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) return -EINVAL; return device->modify_port(device, port_num, port_modify_mask, port_modify); } EXPORT_SYMBOL(ib_modify_port); /** * ib_find_gid - Returns the port number and GID table index where * a specified GID value occurs. * @device: The device to query. * @gid: The GID value to search for. * @gid_type: Type of GID. * @ndev: The ndev related to the GID to search for. * @port_num: The port number of the device where the GID value was found. * @index: The index into the GID table where the GID was found. This * parameter may be NULL. */ int ib_find_gid(struct ib_device *device, union ib_gid *gid, enum ib_gid_type gid_type, struct net_device *ndev, u8 *port_num, u16 *index) { union ib_gid tmp_gid; int ret, port, i; for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) { if (rdma_cap_roce_gid_table(device, port)) { if (!ib_find_cached_gid_by_port(device, gid, gid_type, port, ndev, index)) { *port_num = port; return 0; } } if (gid_type != IB_GID_TYPE_IB) continue; for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) { ret = ib_query_gid(device, port, i, &tmp_gid, NULL); if (ret) return ret; if (!memcmp(&tmp_gid, gid, sizeof *gid)) { *port_num = port; if (index) *index = i; return 0; } } } return -ENOENT; } EXPORT_SYMBOL(ib_find_gid); /** * ib_find_pkey - Returns the PKey table index where a specified * PKey value occurs. * @device: The device to query. * @port_num: The port number of the device to search for the PKey. * @pkey: The PKey value to search for. * @index: The index into the PKey table where the PKey was found. */ int ib_find_pkey(struct ib_device *device, u8 port_num, u16 pkey, u16 *index) { int ret, i; u16 tmp_pkey; int partial_ix = -1; for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) { ret = ib_query_pkey(device, port_num, i, &tmp_pkey); if (ret) return ret; if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) { /* if there is full-member pkey take it.*/ if (tmp_pkey & 0x8000) { *index = i; return 0; } if (partial_ix < 0) partial_ix = i; } } /*no full-member, if exists take the limited*/ if (partial_ix >= 0) { *index = partial_ix; return 0; } return -ENOENT; } EXPORT_SYMBOL(ib_find_pkey); /** * ib_get_net_dev_by_params() - Return the appropriate net_dev * for a received CM request * @dev: An RDMA device on which the request has been received. * @port: Port number on the RDMA device. * @pkey: The Pkey the request came on. * @gid: A GID that the net_dev uses to communicate. * @addr: Contains the IP address that the request specified as its * destination. */ struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, u8 port, u16 pkey, const union ib_gid *gid, const struct sockaddr *addr) { struct net_device *net_dev = NULL; struct ib_client_data *context; if (!rdma_protocol_ib(dev, port)) return NULL; down_read(&lists_rwsem); list_for_each_entry(context, &dev->client_data_list, list) { struct ib_client *client = context->client; if (context->going_down) continue; if (client->get_net_dev_by_params) { net_dev = client->get_net_dev_by_params(dev, port, pkey, gid, addr, context->data); if (net_dev) break; } } up_read(&lists_rwsem); return net_dev; } EXPORT_SYMBOL(ib_get_net_dev_by_params); static int __init ib_core_init(void) { int ret; ib_wq = alloc_workqueue("infiniband", 0, 0); if (!ib_wq) return -ENOMEM; ib_comp_wq = alloc_workqueue("ib-comp-wq", WQ_UNBOUND | WQ_HIGHPRI | WQ_MEM_RECLAIM, WQ_UNBOUND_MAX_ACTIVE); if (!ib_comp_wq) { ret = -ENOMEM; goto err; } ret = class_register(&ib_class); if (ret) { pr_warn("Couldn't create InfiniBand device class\n"); goto err_comp; } ret = ibnl_init(); if (ret) { pr_warn("Couldn't init IB netlink interface\n"); goto err_sysfs; } ret = addr_init(); if (ret) { pr_warn("Could't init IB address resolution\n"); goto err_ibnl; } ib_cache_setup(); return 0; err_ibnl: ibnl_cleanup(); err_sysfs: class_unregister(&ib_class); err_comp: destroy_workqueue(ib_comp_wq); err: destroy_workqueue(ib_wq); return ret; } static void __exit ib_core_cleanup(void) { ib_cache_cleanup(); addr_cleanup(); ibnl_cleanup(); class_unregister(&ib_class); destroy_workqueue(ib_comp_wq); /* Make sure that any pending umem accounting work is done. */ destroy_workqueue(ib_wq); } module_init(ib_core_init); module_exit(ib_core_cleanup);