| /* |
| * 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 <linux/module.h> |
| #include <linux/string.h> |
| #include <linux/errno.h> |
| #include <linux/kernel.h> |
| #include <linux/slab.h> |
| #include <linux/init.h> |
| #include <linux/mutex.h> |
| #include <linux/netdevice.h> |
| #include <linux/security.h> |
| #include <linux/notifier.h> |
| #include <rdma/rdma_netlink.h> |
| #include <rdma/ib_addr.h> |
| #include <rdma/ib_cache.h> |
| |
| #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_comp_unbound_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_security_change(struct notifier_block *nb, unsigned long event, |
| void *lsm_data); |
| static void ib_policy_change_task(struct work_struct *work); |
| static DECLARE_WORK(ib_policy_change_work, ib_policy_change_task); |
| |
| static struct notifier_block ibdev_lsm_nb = { |
| .notifier_call = ib_security_change, |
| }; |
| |
| 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(alloc_pd), |
| IB_MANDATORY_FUNC(dealloc_pd), |
| 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)) { |
| dev_warn(&device->dev, |
| "Device is missing mandatory function %s\n", |
| mandatory_table[i].name); |
| return -EINVAL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static struct ib_device *__ib_device_get_by_index(u32 index) |
| { |
| struct ib_device *device; |
| |
| list_for_each_entry(device, &device_list, core_list) |
| if (device->index == index) |
| return device; |
| |
| return NULL; |
| } |
| |
| /* |
| * Caller is responsible to return refrerence count by calling put_device() |
| */ |
| struct ib_device *ib_device_get_by_index(u32 index) |
| { |
| struct ib_device *device; |
| |
| down_read(&lists_rwsem); |
| device = __ib_device_get_by_index(index); |
| if (device) |
| get_device(&device->dev); |
| |
| up_read(&lists_rwsem); |
| return device; |
| } |
| |
| 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 (!strcmp(name, dev_name(&device->dev))) |
| return device; |
| |
| return NULL; |
| } |
| |
| int ib_device_rename(struct ib_device *ibdev, const char *name) |
| { |
| struct ib_device *device; |
| int ret = 0; |
| |
| if (!strcmp(name, dev_name(&ibdev->dev))) |
| return ret; |
| |
| mutex_lock(&device_mutex); |
| list_for_each_entry(device, &device_list, core_list) { |
| if (!strcmp(name, dev_name(&device->dev))) { |
| ret = -EEXIST; |
| goto out; |
| } |
| } |
| |
| ret = device_rename(&ibdev->dev, name); |
| if (ret) |
| goto out; |
| strlcpy(ibdev->name, name, IB_DEVICE_NAME_MAX); |
| out: |
| mutex_unlock(&device_mutex); |
| return ret; |
| } |
| |
| static int alloc_name(struct ib_device *ibdev, const char *name) |
| { |
| unsigned long *inuse; |
| 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) { |
| char buf[IB_DEVICE_NAME_MAX]; |
| |
| if (sscanf(dev_name(&device->dev), name, &i) != 1) |
| continue; |
| if (i < 0 || i >= PAGE_SIZE * 8) |
| continue; |
| snprintf(buf, sizeof buf, name, i); |
| if (!strcmp(buf, dev_name(&device->dev))) |
| set_bit(i, inuse); |
| } |
| |
| i = find_first_zero_bit(inuse, PAGE_SIZE * 8); |
| free_page((unsigned long) inuse); |
| |
| return dev_set_name(&ibdev->dev, name, i); |
| } |
| |
| static void ib_device_release(struct device *device) |
| { |
| struct ib_device *dev = container_of(device, struct ib_device, dev); |
| |
| WARN_ON(dev->reg_state == IB_DEV_REGISTERED); |
| if (dev->reg_state == IB_DEV_UNREGISTERED) { |
| /* |
| * In IB_DEV_UNINITIALIZED state, cache or port table |
| * is not even created. Free cache and port table only when |
| * device reaches UNREGISTERED state. |
| */ |
| ib_cache_release_one(dev); |
| kfree(dev->port_immutable); |
| } |
| kfree(dev); |
| } |
| |
| static int ib_device_uevent(struct device *device, |
| struct kobj_uevent_env *env) |
| { |
| if (add_uevent_var(env, "NAME=%s", dev_name(device))) |
| 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; |
| |
| rdma_restrack_init(&device->res); |
| |
| 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); |
| rwlock_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(!list_empty(&device->client_data_list)); |
| WARN_ON(device->reg_state != IB_DEV_UNREGISTERED && |
| device->reg_state != IB_DEV_UNINITIALIZED); |
| rdma_restrack_clean(&device->res); |
| put_device(&device->dev); |
| } |
| EXPORT_SYMBOL(ib_dealloc_device); |
| |
| static int add_client_context(struct ib_device *device, struct ib_client *client) |
| { |
| struct ib_client_data *context; |
| |
| context = kmalloc(sizeof(*context), GFP_KERNEL); |
| if (!context) |
| return -ENOMEM; |
| |
| context->client = client; |
| context->data = NULL; |
| context->going_down = false; |
| |
| down_write(&lists_rwsem); |
| write_lock_irq(&device->client_data_lock); |
| list_add(&context->list, &device->client_data_list); |
| write_unlock_irq(&device->client_data_lock); |
| 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 = kcalloc(end_port + 1, |
| sizeof(*device->port_immutable), |
| 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; |
| } |
| |
| void ib_get_device_fw_str(struct ib_device *dev, char *str) |
| { |
| if (dev->get_dev_fw_str) |
| dev->get_dev_fw_str(dev, str); |
| else |
| str[0] = '\0'; |
| } |
| EXPORT_SYMBOL(ib_get_device_fw_str); |
| |
| static int setup_port_pkey_list(struct ib_device *device) |
| { |
| int i; |
| |
| /** |
| * device->port_pkey_list is indexed directly by the port number, |
| * Therefore it is declared as a 1 based array with potential empty |
| * slots at the beginning. |
| */ |
| device->port_pkey_list = kcalloc(rdma_end_port(device) + 1, |
| sizeof(*device->port_pkey_list), |
| GFP_KERNEL); |
| |
| if (!device->port_pkey_list) |
| return -ENOMEM; |
| |
| for (i = 0; i < (rdma_end_port(device) + 1); i++) { |
| spin_lock_init(&device->port_pkey_list[i].list_lock); |
| INIT_LIST_HEAD(&device->port_pkey_list[i].pkey_list); |
| } |
| |
| return 0; |
| } |
| |
| static void ib_policy_change_task(struct work_struct *work) |
| { |
| struct ib_device *dev; |
| |
| down_read(&lists_rwsem); |
| list_for_each_entry(dev, &device_list, core_list) { |
| int i; |
| |
| for (i = rdma_start_port(dev); i <= rdma_end_port(dev); i++) { |
| u64 sp; |
| int ret = ib_get_cached_subnet_prefix(dev, |
| i, |
| &sp); |
| |
| WARN_ONCE(ret, |
| "ib_get_cached_subnet_prefix err: %d, this should never happen here\n", |
| ret); |
| if (!ret) |
| ib_security_cache_change(dev, i, sp); |
| } |
| } |
| up_read(&lists_rwsem); |
| } |
| |
| static int ib_security_change(struct notifier_block *nb, unsigned long event, |
| void *lsm_data) |
| { |
| if (event != LSM_POLICY_CHANGE) |
| return NOTIFY_DONE; |
| |
| schedule_work(&ib_policy_change_work); |
| |
| return NOTIFY_OK; |
| } |
| |
| /** |
| * __dev_new_index - allocate an device index |
| * |
| * Returns a suitable unique value for a new device interface |
| * number. It assumes that there are less than 2^32-1 ib devices |
| * will be present in the system. |
| */ |
| static u32 __dev_new_index(void) |
| { |
| /* |
| * The device index to allow stable naming. |
| * Similar to struct net -> ifindex. |
| */ |
| static u32 index; |
| |
| for (;;) { |
| if (!(++index)) |
| index = 1; |
| |
| if (!__ib_device_get_by_index(index)) |
| return index; |
| } |
| } |
| |
| static void setup_dma_device(struct ib_device *device) |
| { |
| struct device *parent = device->dev.parent; |
| |
| WARN_ON_ONCE(device->dma_device); |
| if (device->dev.dma_ops) { |
| /* |
| * The caller provided custom DMA operations. Copy the |
| * DMA-related fields that are used by e.g. dma_alloc_coherent() |
| * into device->dev. |
| */ |
| device->dma_device = &device->dev; |
| if (!device->dev.dma_mask) { |
| if (parent) |
| device->dev.dma_mask = parent->dma_mask; |
| else |
| WARN_ON_ONCE(true); |
| } |
| if (!device->dev.coherent_dma_mask) { |
| if (parent) |
| device->dev.coherent_dma_mask = |
| parent->coherent_dma_mask; |
| else |
| WARN_ON_ONCE(true); |
| } |
| } else { |
| /* |
| * The caller did not provide custom DMA operations. Use the |
| * DMA mapping operations of the parent device. |
| */ |
| WARN_ON_ONCE(!parent); |
| device->dma_device = parent; |
| } |
| } |
| |
| static void cleanup_device(struct ib_device *device) |
| { |
| ib_cache_cleanup_one(device); |
| ib_cache_release_one(device); |
| kfree(device->port_pkey_list); |
| kfree(device->port_immutable); |
| } |
| |
| static int setup_device(struct ib_device *device) |
| { |
| struct ib_udata uhw = {.outlen = 0, .inlen = 0}; |
| int ret; |
| |
| ret = ib_device_check_mandatory(device); |
| if (ret) |
| return ret; |
| |
| ret = read_port_immutable(device); |
| if (ret) { |
| dev_warn(&device->dev, |
| "Couldn't create per port immutable data\n"); |
| return ret; |
| } |
| |
| memset(&device->attrs, 0, sizeof(device->attrs)); |
| ret = device->query_device(device, &device->attrs, &uhw); |
| if (ret) { |
| dev_warn(&device->dev, |
| "Couldn't query the device attributes\n"); |
| goto port_cleanup; |
| } |
| |
| ret = setup_port_pkey_list(device); |
| if (ret) { |
| dev_warn(&device->dev, "Couldn't create per port_pkey_list\n"); |
| goto port_cleanup; |
| } |
| |
| ret = ib_cache_setup_one(device); |
| if (ret) { |
| dev_warn(&device->dev, |
| "Couldn't set up InfiniBand P_Key/GID cache\n"); |
| goto pkey_cleanup; |
| } |
| return 0; |
| |
| pkey_cleanup: |
| kfree(device->port_pkey_list); |
| port_cleanup: |
| kfree(device->port_immutable); |
| return ret; |
| } |
| |
| /** |
| * 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, const char *name, |
| int (*port_callback)(struct ib_device *, u8, |
| struct kobject *)) |
| { |
| int ret; |
| struct ib_client *client; |
| |
| setup_dma_device(device); |
| |
| mutex_lock(&device_mutex); |
| |
| if (strchr(name, '%')) { |
| ret = alloc_name(device, name); |
| if (ret) |
| goto out; |
| } else { |
| ret = dev_set_name(&device->dev, name); |
| if (ret) |
| goto out; |
| } |
| if (__ib_device_get_by_name(dev_name(&device->dev))) { |
| ret = -ENFILE; |
| goto out; |
| } |
| strlcpy(device->name, dev_name(&device->dev), IB_DEVICE_NAME_MAX); |
| |
| ret = setup_device(device); |
| if (ret) |
| goto out; |
| |
| device->index = __dev_new_index(); |
| |
| ret = ib_device_register_rdmacg(device); |
| if (ret) { |
| dev_warn(&device->dev, |
| "Couldn't register device with rdma cgroup\n"); |
| goto dev_cleanup; |
| } |
| |
| ret = ib_device_register_sysfs(device, port_callback); |
| if (ret) { |
| dev_warn(&device->dev, |
| "Couldn't register device with driver model\n"); |
| goto cg_cleanup; |
| } |
| |
| device->reg_state = IB_DEV_REGISTERED; |
| |
| list_for_each_entry(client, &client_list, list) |
| if (!add_client_context(device, client) && client->add) |
| client->add(device); |
| |
| down_write(&lists_rwsem); |
| list_add_tail(&device->core_list, &device_list); |
| up_write(&lists_rwsem); |
| mutex_unlock(&device_mutex); |
| return 0; |
| |
| cg_cleanup: |
| ib_device_unregister_rdmacg(device); |
| dev_cleanup: |
| cleanup_device(device); |
| 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); |
| write_lock_irq(&device->client_data_lock); |
| list_for_each_entry(context, &device->client_data_list, list) |
| context->going_down = true; |
| write_unlock_irq(&device->client_data_lock); |
| downgrade_write(&lists_rwsem); |
| |
| list_for_each_entry(context, &device->client_data_list, list) { |
| if (context->client->remove) |
| context->client->remove(device, context->data); |
| } |
| up_read(&lists_rwsem); |
| |
| ib_device_unregister_sysfs(device); |
| ib_device_unregister_rdmacg(device); |
| |
| mutex_unlock(&device_mutex); |
| |
| ib_cache_cleanup_one(device); |
| |
| ib_security_destroy_port_pkey_list(device); |
| kfree(device->port_pkey_list); |
| |
| down_write(&lists_rwsem); |
| write_lock_irqsave(&device->client_data_lock, flags); |
| list_for_each_entry_safe(context, tmp, &device->client_data_list, |
| list) { |
| list_del(&context->list); |
| kfree(context); |
| } |
| write_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 (!add_client_context(device, client) && client->add) |
| 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; |
| struct ib_device *device; |
| |
| 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); |
| write_lock_irq(&device->client_data_lock); |
| list_for_each_entry(context, &device->client_data_list, list) |
| if (context->client == client) { |
| context->going_down = true; |
| found_context = context; |
| break; |
| } |
| write_unlock_irq(&device->client_data_lock); |
| up_write(&lists_rwsem); |
| |
| if (client->remove) |
| client->remove(device, found_context ? |
| found_context->data : NULL); |
| |
| if (!found_context) { |
| dev_warn(&device->dev, |
| "No client context found for %s\n", |
| client->name); |
| continue; |
| } |
| |
| down_write(&lists_rwsem); |
| write_lock_irq(&device->client_data_lock); |
| list_del(&found_context->list); |
| write_unlock_irq(&device->client_data_lock); |
| up_write(&lists_rwsem); |
| kfree(found_context); |
| } |
| |
| 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; |
| |
| read_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; |
| } |
| read_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; |
| |
| write_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; |
| } |
| |
| dev_warn(&device->dev, "No client context found for %s\n", |
| client->name); |
| |
| out: |
| write_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. |
| */ |
| void 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); |
| } |
| 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(). |
| */ |
| void 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); |
| } |
| 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 (!rdma_is_port_valid(device, port_num)) |
| 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; |
| |
| if (rdma_port_get_link_layer(device, port_num) != IB_LINK_LAYER_INFINIBAND) |
| return 0; |
| |
| err = device->query_gid(device, port_num, 0, &gid); |
| if (err) |
| return err; |
| |
| port_attr->subnet_prefix = be64_to_cpu(gid.global.subnet_prefix); |
| return 0; |
| } |
| EXPORT_SYMBOL(ib_query_port); |
| |
| /** |
| * 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_enum_all_devs - enumerate all ib_devices |
| * @cb: Callback to call for each found ib_device |
| * |
| * Enumerates all ib_devices and calls callback() on each device. |
| */ |
| int ib_enum_all_devs(nldev_callback nldev_cb, struct sk_buff *skb, |
| struct netlink_callback *cb) |
| { |
| struct ib_device *dev; |
| unsigned int idx = 0; |
| int ret = 0; |
| |
| down_read(&lists_rwsem); |
| list_for_each_entry(dev, &device_list, core_list) { |
| ret = nldev_cb(dev, skb, cb, idx); |
| if (ret) |
| break; |
| idx++; |
| } |
| |
| up_read(&lists_rwsem); |
| return ret; |
| } |
| |
| /** |
| * 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) |
| { |
| int rc; |
| |
| if (!rdma_is_port_valid(device, port_num)) |
| return -EINVAL; |
| |
| if (device->modify_port) |
| rc = device->modify_port(device, port_num, port_modify_mask, |
| port_modify); |
| else |
| rc = rdma_protocol_roce(device, port_num) ? 0 : -ENOSYS; |
| return rc; |
| } |
| EXPORT_SYMBOL(ib_modify_port); |
| |
| /** |
| * ib_find_gid - Returns the port number and GID table index where |
| * a specified GID value occurs. Its searches only for IB link layer. |
| * @device: The device to query. |
| * @gid: The GID value 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, |
| 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_protocol_ib(device, port)) |
| continue; |
| |
| for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) { |
| ret = rdma_query_gid(device, port, i, &tmp_gid); |
| 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 const struct rdma_nl_cbs ibnl_ls_cb_table[RDMA_NL_LS_NUM_OPS] = { |
| [RDMA_NL_LS_OP_RESOLVE] = { |
| .doit = ib_nl_handle_resolve_resp, |
| .flags = RDMA_NL_ADMIN_PERM, |
| }, |
| [RDMA_NL_LS_OP_SET_TIMEOUT] = { |
| .doit = ib_nl_handle_set_timeout, |
| .flags = RDMA_NL_ADMIN_PERM, |
| }, |
| [RDMA_NL_LS_OP_IP_RESOLVE] = { |
| .doit = ib_nl_handle_ip_res_resp, |
| .flags = RDMA_NL_ADMIN_PERM, |
| }, |
| }; |
| |
| 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_HIGHPRI | WQ_MEM_RECLAIM | WQ_SYSFS, 0); |
| if (!ib_comp_wq) { |
| ret = -ENOMEM; |
| goto err; |
| } |
| |
| ib_comp_unbound_wq = |
| alloc_workqueue("ib-comp-unb-wq", |
| WQ_UNBOUND | WQ_HIGHPRI | WQ_MEM_RECLAIM | |
| WQ_SYSFS, WQ_UNBOUND_MAX_ACTIVE); |
| if (!ib_comp_unbound_wq) { |
| ret = -ENOMEM; |
| goto err_comp; |
| } |
| |
| ret = class_register(&ib_class); |
| if (ret) { |
| pr_warn("Couldn't create InfiniBand device class\n"); |
| goto err_comp_unbound; |
| } |
| |
| ret = rdma_nl_init(); |
| if (ret) { |
| pr_warn("Couldn't init IB netlink interface: err %d\n", ret); |
| goto err_sysfs; |
| } |
| |
| ret = addr_init(); |
| if (ret) { |
| pr_warn("Could't init IB address resolution\n"); |
| goto err_ibnl; |
| } |
| |
| ret = ib_mad_init(); |
| if (ret) { |
| pr_warn("Couldn't init IB MAD\n"); |
| goto err_addr; |
| } |
| |
| ret = ib_sa_init(); |
| if (ret) { |
| pr_warn("Couldn't init SA\n"); |
| goto err_mad; |
| } |
| |
| ret = register_lsm_notifier(&ibdev_lsm_nb); |
| if (ret) { |
| pr_warn("Couldn't register LSM notifier. ret %d\n", ret); |
| goto err_sa; |
| } |
| |
| nldev_init(); |
| rdma_nl_register(RDMA_NL_LS, ibnl_ls_cb_table); |
| roce_gid_mgmt_init(); |
| |
| return 0; |
| |
| err_sa: |
| ib_sa_cleanup(); |
| err_mad: |
| ib_mad_cleanup(); |
| err_addr: |
| addr_cleanup(); |
| err_ibnl: |
| rdma_nl_exit(); |
| err_sysfs: |
| class_unregister(&ib_class); |
| err_comp_unbound: |
| destroy_workqueue(ib_comp_unbound_wq); |
| err_comp: |
| destroy_workqueue(ib_comp_wq); |
| err: |
| destroy_workqueue(ib_wq); |
| return ret; |
| } |
| |
| static void __exit ib_core_cleanup(void) |
| { |
| roce_gid_mgmt_cleanup(); |
| nldev_exit(); |
| rdma_nl_unregister(RDMA_NL_LS); |
| unregister_lsm_notifier(&ibdev_lsm_nb); |
| ib_sa_cleanup(); |
| ib_mad_cleanup(); |
| addr_cleanup(); |
| rdma_nl_exit(); |
| class_unregister(&ib_class); |
| destroy_workqueue(ib_comp_unbound_wq); |
| destroy_workqueue(ib_comp_wq); |
| /* Make sure that any pending umem accounting work is done. */ |
| destroy_workqueue(ib_wq); |
| } |
| |
| MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_LS, 4); |
| |
| subsys_initcall(ib_core_init); |
| module_exit(ib_core_cleanup); |