11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (c) 2004 Topspin Communications. All rights reserved. 32a1d9b7fSRoland Dreier * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * This software is available to you under a choice of one of two 61da177e4SLinus Torvalds * licenses. You may choose to be licensed under the terms of the GNU 71da177e4SLinus Torvalds * General Public License (GPL) Version 2, available from the file 81da177e4SLinus Torvalds * COPYING in the main directory of this source tree, or the 91da177e4SLinus Torvalds * OpenIB.org BSD license below: 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or 121da177e4SLinus Torvalds * without modification, are permitted provided that the following 131da177e4SLinus Torvalds * conditions are met: 141da177e4SLinus Torvalds * 151da177e4SLinus Torvalds * - Redistributions of source code must retain the above 161da177e4SLinus Torvalds * copyright notice, this list of conditions and the following 171da177e4SLinus Torvalds * disclaimer. 181da177e4SLinus Torvalds * 191da177e4SLinus Torvalds * - Redistributions in binary form must reproduce the above 201da177e4SLinus Torvalds * copyright notice, this list of conditions and the following 211da177e4SLinus Torvalds * disclaimer in the documentation and/or other materials 221da177e4SLinus Torvalds * provided with the distribution. 231da177e4SLinus Torvalds * 241da177e4SLinus Torvalds * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 251da177e4SLinus Torvalds * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 261da177e4SLinus Torvalds * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 271da177e4SLinus Torvalds * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 281da177e4SLinus Torvalds * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 291da177e4SLinus Torvalds * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 301da177e4SLinus Torvalds * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 311da177e4SLinus Torvalds * SOFTWARE. 321da177e4SLinus Torvalds */ 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds #include <linux/module.h> 351da177e4SLinus Torvalds #include <linux/string.h> 361da177e4SLinus Torvalds #include <linux/errno.h> 379a6b090cSAhmed S. Darwish #include <linux/kernel.h> 381da177e4SLinus Torvalds #include <linux/slab.h> 391da177e4SLinus Torvalds #include <linux/init.h> 4095ed644fSIngo Molnar #include <linux/mutex.h> 41b2cbae2cSRoland Dreier #include <rdma/rdma_netlink.h> 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds #include "core_priv.h" 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds MODULE_AUTHOR("Roland Dreier"); 461da177e4SLinus Torvalds MODULE_DESCRIPTION("core kernel InfiniBand API"); 471da177e4SLinus Torvalds MODULE_LICENSE("Dual BSD/GPL"); 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds struct ib_client_data { 501da177e4SLinus Torvalds struct list_head list; 511da177e4SLinus Torvalds struct ib_client *client; 521da177e4SLinus Torvalds void * data; 537c1eb45aSHaggai Eran /* The device or client is going down. Do not call client or device 547c1eb45aSHaggai Eran * callbacks other than remove(). */ 557c1eb45aSHaggai Eran bool going_down; 561da177e4SLinus Torvalds }; 571da177e4SLinus Torvalds 58f0626710STejun Heo struct workqueue_struct *ib_wq; 59f0626710STejun Heo EXPORT_SYMBOL_GPL(ib_wq); 60f0626710STejun Heo 615aa44bb9SHaggai Eran /* The device_list and client_list contain devices and clients after their 625aa44bb9SHaggai Eran * registration has completed, and the devices and clients are removed 635aa44bb9SHaggai Eran * during unregistration. */ 641da177e4SLinus Torvalds static LIST_HEAD(device_list); 651da177e4SLinus Torvalds static LIST_HEAD(client_list); 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds /* 685aa44bb9SHaggai Eran * device_mutex and lists_rwsem protect access to both device_list and 695aa44bb9SHaggai Eran * client_list. device_mutex protects writer access by device and client 705aa44bb9SHaggai Eran * registration / de-registration. lists_rwsem protects reader access to 715aa44bb9SHaggai Eran * these lists. Iterators of these lists must lock it for read, while updates 725aa44bb9SHaggai Eran * to the lists must be done with a write lock. A special case is when the 735aa44bb9SHaggai Eran * device_mutex is locked. In this case locking the lists for read access is 745aa44bb9SHaggai Eran * not necessary as the device_mutex implies it. 757c1eb45aSHaggai Eran * 767c1eb45aSHaggai Eran * lists_rwsem also protects access to the client data list. 771da177e4SLinus Torvalds */ 7895ed644fSIngo Molnar static DEFINE_MUTEX(device_mutex); 795aa44bb9SHaggai Eran static DECLARE_RWSEM(lists_rwsem); 805aa44bb9SHaggai Eran 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds static int ib_device_check_mandatory(struct ib_device *device) 831da177e4SLinus Torvalds { 841da177e4SLinus Torvalds #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x } 851da177e4SLinus Torvalds static const struct { 861da177e4SLinus Torvalds size_t offset; 871da177e4SLinus Torvalds char *name; 881da177e4SLinus Torvalds } mandatory_table[] = { 891da177e4SLinus Torvalds IB_MANDATORY_FUNC(query_device), 901da177e4SLinus Torvalds IB_MANDATORY_FUNC(query_port), 911da177e4SLinus Torvalds IB_MANDATORY_FUNC(query_pkey), 921da177e4SLinus Torvalds IB_MANDATORY_FUNC(query_gid), 931da177e4SLinus Torvalds IB_MANDATORY_FUNC(alloc_pd), 941da177e4SLinus Torvalds IB_MANDATORY_FUNC(dealloc_pd), 951da177e4SLinus Torvalds IB_MANDATORY_FUNC(create_ah), 961da177e4SLinus Torvalds IB_MANDATORY_FUNC(destroy_ah), 971da177e4SLinus Torvalds IB_MANDATORY_FUNC(create_qp), 981da177e4SLinus Torvalds IB_MANDATORY_FUNC(modify_qp), 991da177e4SLinus Torvalds IB_MANDATORY_FUNC(destroy_qp), 1001da177e4SLinus Torvalds IB_MANDATORY_FUNC(post_send), 1011da177e4SLinus Torvalds IB_MANDATORY_FUNC(post_recv), 1021da177e4SLinus Torvalds IB_MANDATORY_FUNC(create_cq), 1031da177e4SLinus Torvalds IB_MANDATORY_FUNC(destroy_cq), 1041da177e4SLinus Torvalds IB_MANDATORY_FUNC(poll_cq), 1051da177e4SLinus Torvalds IB_MANDATORY_FUNC(req_notify_cq), 1061da177e4SLinus Torvalds IB_MANDATORY_FUNC(get_dma_mr), 1077738613eSIra Weiny IB_MANDATORY_FUNC(dereg_mr), 1087738613eSIra Weiny IB_MANDATORY_FUNC(get_port_immutable) 1091da177e4SLinus Torvalds }; 1101da177e4SLinus Torvalds int i; 1111da177e4SLinus Torvalds 1129a6b090cSAhmed S. Darwish for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) { 1131da177e4SLinus Torvalds if (!*(void **) ((void *) device + mandatory_table[i].offset)) { 1141da177e4SLinus Torvalds printk(KERN_WARNING "Device %s is missing mandatory function %s\n", 1151da177e4SLinus Torvalds device->name, mandatory_table[i].name); 1161da177e4SLinus Torvalds return -EINVAL; 1171da177e4SLinus Torvalds } 1181da177e4SLinus Torvalds } 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds return 0; 1211da177e4SLinus Torvalds } 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds static struct ib_device *__ib_device_get_by_name(const char *name) 1241da177e4SLinus Torvalds { 1251da177e4SLinus Torvalds struct ib_device *device; 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) 1281da177e4SLinus Torvalds if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX)) 1291da177e4SLinus Torvalds return device; 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds return NULL; 1321da177e4SLinus Torvalds } 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds static int alloc_name(char *name) 1361da177e4SLinus Torvalds { 13765d470b3SRoland Dreier unsigned long *inuse; 1381da177e4SLinus Torvalds char buf[IB_DEVICE_NAME_MAX]; 1391da177e4SLinus Torvalds struct ib_device *device; 1401da177e4SLinus Torvalds int i; 1411da177e4SLinus Torvalds 14265d470b3SRoland Dreier inuse = (unsigned long *) get_zeroed_page(GFP_KERNEL); 1431da177e4SLinus Torvalds if (!inuse) 1441da177e4SLinus Torvalds return -ENOMEM; 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) { 1471da177e4SLinus Torvalds if (!sscanf(device->name, name, &i)) 1481da177e4SLinus Torvalds continue; 1491da177e4SLinus Torvalds if (i < 0 || i >= PAGE_SIZE * 8) 1501da177e4SLinus Torvalds continue; 1511da177e4SLinus Torvalds snprintf(buf, sizeof buf, name, i); 1521da177e4SLinus Torvalds if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX)) 1531da177e4SLinus Torvalds set_bit(i, inuse); 1541da177e4SLinus Torvalds } 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds i = find_first_zero_bit(inuse, PAGE_SIZE * 8); 1571da177e4SLinus Torvalds free_page((unsigned long) inuse); 1581da177e4SLinus Torvalds snprintf(buf, sizeof buf, name, i); 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds if (__ib_device_get_by_name(buf)) 1611da177e4SLinus Torvalds return -ENFILE; 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds strlcpy(name, buf, IB_DEVICE_NAME_MAX); 1641da177e4SLinus Torvalds return 0; 1651da177e4SLinus Torvalds } 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds /** 1681da177e4SLinus Torvalds * ib_alloc_device - allocate an IB device struct 1691da177e4SLinus Torvalds * @size:size of structure to allocate 1701da177e4SLinus Torvalds * 1711da177e4SLinus Torvalds * Low-level drivers should use ib_alloc_device() to allocate &struct 1721da177e4SLinus Torvalds * ib_device. @size is the size of the structure to be allocated, 1731da177e4SLinus Torvalds * including any private data used by the low-level driver. 1741da177e4SLinus Torvalds * ib_dealloc_device() must be used to free structures allocated with 1751da177e4SLinus Torvalds * ib_alloc_device(). 1761da177e4SLinus Torvalds */ 1771da177e4SLinus Torvalds struct ib_device *ib_alloc_device(size_t size) 1781da177e4SLinus Torvalds { 1791da177e4SLinus Torvalds BUG_ON(size < sizeof (struct ib_device)); 1801da177e4SLinus Torvalds 181de6eb66bSRoland Dreier return kzalloc(size, GFP_KERNEL); 1821da177e4SLinus Torvalds } 1831da177e4SLinus Torvalds EXPORT_SYMBOL(ib_alloc_device); 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds /** 1861da177e4SLinus Torvalds * ib_dealloc_device - free an IB device struct 1871da177e4SLinus Torvalds * @device:structure to free 1881da177e4SLinus Torvalds * 1891da177e4SLinus Torvalds * Free a structure allocated with ib_alloc_device(). 1901da177e4SLinus Torvalds */ 1911da177e4SLinus Torvalds void ib_dealloc_device(struct ib_device *device) 1921da177e4SLinus Torvalds { 1931da177e4SLinus Torvalds if (device->reg_state == IB_DEV_UNINITIALIZED) { 1941da177e4SLinus Torvalds kfree(device); 1951da177e4SLinus Torvalds return; 1961da177e4SLinus Torvalds } 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds BUG_ON(device->reg_state != IB_DEV_UNREGISTERED); 1991da177e4SLinus Torvalds 2009206dff1SRoland Dreier kobject_put(&device->dev.kobj); 2011da177e4SLinus Torvalds } 2021da177e4SLinus Torvalds EXPORT_SYMBOL(ib_dealloc_device); 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds static int add_client_context(struct ib_device *device, struct ib_client *client) 2051da177e4SLinus Torvalds { 2061da177e4SLinus Torvalds struct ib_client_data *context; 2071da177e4SLinus Torvalds unsigned long flags; 2081da177e4SLinus Torvalds 2091da177e4SLinus Torvalds context = kmalloc(sizeof *context, GFP_KERNEL); 2101da177e4SLinus Torvalds if (!context) { 2111da177e4SLinus Torvalds printk(KERN_WARNING "Couldn't allocate client context for %s/%s\n", 2121da177e4SLinus Torvalds device->name, client->name); 2131da177e4SLinus Torvalds return -ENOMEM; 2141da177e4SLinus Torvalds } 2151da177e4SLinus Torvalds 2161da177e4SLinus Torvalds context->client = client; 2171da177e4SLinus Torvalds context->data = NULL; 2187c1eb45aSHaggai Eran context->going_down = false; 2191da177e4SLinus Torvalds 2207c1eb45aSHaggai Eran down_write(&lists_rwsem); 2211da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 2221da177e4SLinus Torvalds list_add(&context->list, &device->client_data_list); 2231da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 2247c1eb45aSHaggai Eran up_write(&lists_rwsem); 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvalds return 0; 2271da177e4SLinus Torvalds } 2281da177e4SLinus Torvalds 229337877a4SIra Weiny static int verify_immutable(const struct ib_device *dev, u8 port) 230337877a4SIra Weiny { 231337877a4SIra Weiny return WARN_ON(!rdma_cap_ib_mad(dev, port) && 232337877a4SIra Weiny rdma_max_mad_size(dev, port) != 0); 233337877a4SIra Weiny } 234337877a4SIra Weiny 2357738613eSIra Weiny static int read_port_immutable(struct ib_device *device) 2365eb620c8SYosef Etigin { 2377738613eSIra Weiny int ret = -ENOMEM; 2387738613eSIra Weiny u8 start_port = rdma_start_port(device); 2397738613eSIra Weiny u8 end_port = rdma_end_port(device); 2407738613eSIra Weiny u8 port; 2415eb620c8SYosef Etigin 2427738613eSIra Weiny /** 2437738613eSIra Weiny * device->port_immutable is indexed directly by the port number to make 2447738613eSIra Weiny * access to this data as efficient as possible. 2457738613eSIra Weiny * 2467738613eSIra Weiny * Therefore port_immutable is declared as a 1 based array with 2477738613eSIra Weiny * potential empty slots at the beginning. 2487738613eSIra Weiny */ 2497738613eSIra Weiny device->port_immutable = kzalloc(sizeof(*device->port_immutable) 2507738613eSIra Weiny * (end_port + 1), 2515eb620c8SYosef Etigin GFP_KERNEL); 2527738613eSIra Weiny if (!device->port_immutable) 2535eb620c8SYosef Etigin goto err; 2545eb620c8SYosef Etigin 2557738613eSIra Weiny for (port = start_port; port <= end_port; ++port) { 2567738613eSIra Weiny ret = device->get_port_immutable(device, port, 2577738613eSIra Weiny &device->port_immutable[port]); 2585eb620c8SYosef Etigin if (ret) 2595eb620c8SYosef Etigin goto err; 260337877a4SIra Weiny 261337877a4SIra Weiny if (verify_immutable(device, port)) { 262337877a4SIra Weiny ret = -EINVAL; 263337877a4SIra Weiny goto err; 264337877a4SIra Weiny } 2655eb620c8SYosef Etigin } 2665eb620c8SYosef Etigin 2675eb620c8SYosef Etigin ret = 0; 2685eb620c8SYosef Etigin goto out; 2695eb620c8SYosef Etigin err: 2707738613eSIra Weiny kfree(device->port_immutable); 2715eb620c8SYosef Etigin out: 2725eb620c8SYosef Etigin return ret; 2735eb620c8SYosef Etigin } 2745eb620c8SYosef Etigin 2751da177e4SLinus Torvalds /** 2761da177e4SLinus Torvalds * ib_register_device - Register an IB device with IB core 2771da177e4SLinus Torvalds * @device:Device to register 2781da177e4SLinus Torvalds * 2791da177e4SLinus Torvalds * Low-level drivers use ib_register_device() to register their 2801da177e4SLinus Torvalds * devices with the IB core. All registered clients will receive a 2811da177e4SLinus Torvalds * callback for each device that is added. @device must be allocated 2821da177e4SLinus Torvalds * with ib_alloc_device(). 2831da177e4SLinus Torvalds */ 2849a6edb60SRalph Campbell int ib_register_device(struct ib_device *device, 2859a6edb60SRalph Campbell int (*port_callback)(struct ib_device *, 2869a6edb60SRalph Campbell u8, struct kobject *)) 2871da177e4SLinus Torvalds { 2881da177e4SLinus Torvalds int ret; 2891da177e4SLinus Torvalds 29095ed644fSIngo Molnar mutex_lock(&device_mutex); 2911da177e4SLinus Torvalds 2921da177e4SLinus Torvalds if (strchr(device->name, '%')) { 2931da177e4SLinus Torvalds ret = alloc_name(device->name); 2941da177e4SLinus Torvalds if (ret) 2951da177e4SLinus Torvalds goto out; 2961da177e4SLinus Torvalds } 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds if (ib_device_check_mandatory(device)) { 2991da177e4SLinus Torvalds ret = -EINVAL; 3001da177e4SLinus Torvalds goto out; 3011da177e4SLinus Torvalds } 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds INIT_LIST_HEAD(&device->event_handler_list); 3041da177e4SLinus Torvalds INIT_LIST_HEAD(&device->client_data_list); 3051da177e4SLinus Torvalds spin_lock_init(&device->event_handler_lock); 3061da177e4SLinus Torvalds spin_lock_init(&device->client_data_lock); 3071da177e4SLinus Torvalds 3087738613eSIra Weiny ret = read_port_immutable(device); 3095eb620c8SYosef Etigin if (ret) { 3107738613eSIra Weiny printk(KERN_WARNING "Couldn't create per port immutable data %s\n", 3115eb620c8SYosef Etigin device->name); 3125eb620c8SYosef Etigin goto out; 3135eb620c8SYosef Etigin } 3145eb620c8SYosef Etigin 3159a6edb60SRalph Campbell ret = ib_device_register_sysfs(device, port_callback); 3161da177e4SLinus Torvalds if (ret) { 3171da177e4SLinus Torvalds printk(KERN_WARNING "Couldn't register device %s with driver model\n", 3181da177e4SLinus Torvalds device->name); 3197738613eSIra Weiny kfree(device->port_immutable); 3201da177e4SLinus Torvalds goto out; 3211da177e4SLinus Torvalds } 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds device->reg_state = IB_DEV_REGISTERED; 3241da177e4SLinus Torvalds 3251da177e4SLinus Torvalds { 3261da177e4SLinus Torvalds struct ib_client *client; 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds list_for_each_entry(client, &client_list, list) 3291da177e4SLinus Torvalds if (client->add && !add_client_context(device, client)) 3301da177e4SLinus Torvalds client->add(device); 3311da177e4SLinus Torvalds } 3321da177e4SLinus Torvalds 3335aa44bb9SHaggai Eran down_write(&lists_rwsem); 3345aa44bb9SHaggai Eran list_add_tail(&device->core_list, &device_list); 3355aa44bb9SHaggai Eran up_write(&lists_rwsem); 3361da177e4SLinus Torvalds out: 33795ed644fSIngo Molnar mutex_unlock(&device_mutex); 3381da177e4SLinus Torvalds return ret; 3391da177e4SLinus Torvalds } 3401da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_device); 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds /** 3431da177e4SLinus Torvalds * ib_unregister_device - Unregister an IB device 3441da177e4SLinus Torvalds * @device:Device to unregister 3451da177e4SLinus Torvalds * 3461da177e4SLinus Torvalds * Unregister an IB device. All clients will receive a remove callback. 3471da177e4SLinus Torvalds */ 3481da177e4SLinus Torvalds void ib_unregister_device(struct ib_device *device) 3491da177e4SLinus Torvalds { 3501da177e4SLinus Torvalds struct ib_client_data *context, *tmp; 3511da177e4SLinus Torvalds unsigned long flags; 3521da177e4SLinus Torvalds 35395ed644fSIngo Molnar mutex_lock(&device_mutex); 3541da177e4SLinus Torvalds 3555aa44bb9SHaggai Eran down_write(&lists_rwsem); 3565aa44bb9SHaggai Eran list_del(&device->core_list); 3577c1eb45aSHaggai Eran spin_lock_irqsave(&device->client_data_lock, flags); 3587c1eb45aSHaggai Eran list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 3597c1eb45aSHaggai Eran context->going_down = true; 3607c1eb45aSHaggai Eran spin_unlock_irqrestore(&device->client_data_lock, flags); 3617c1eb45aSHaggai Eran downgrade_write(&lists_rwsem); 3625aa44bb9SHaggai Eran 3637c1eb45aSHaggai Eran list_for_each_entry_safe(context, tmp, &device->client_data_list, 3647c1eb45aSHaggai Eran list) { 3657c1eb45aSHaggai Eran if (context->client->remove) 3667c1eb45aSHaggai Eran context->client->remove(device, context->data); 3677c1eb45aSHaggai Eran } 3687c1eb45aSHaggai Eran up_read(&lists_rwsem); 3691da177e4SLinus Torvalds 37095ed644fSIngo Molnar mutex_unlock(&device_mutex); 3711da177e4SLinus Torvalds 3729206dff1SRoland Dreier ib_device_unregister_sysfs(device); 3739206dff1SRoland Dreier 3747c1eb45aSHaggai Eran down_write(&lists_rwsem); 3751da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 3761da177e4SLinus Torvalds list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 3771da177e4SLinus Torvalds kfree(context); 3781da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 3797c1eb45aSHaggai Eran up_write(&lists_rwsem); 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds device->reg_state = IB_DEV_UNREGISTERED; 3821da177e4SLinus Torvalds } 3831da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_device); 3841da177e4SLinus Torvalds 3851da177e4SLinus Torvalds /** 3861da177e4SLinus Torvalds * ib_register_client - Register an IB client 3871da177e4SLinus Torvalds * @client:Client to register 3881da177e4SLinus Torvalds * 3891da177e4SLinus Torvalds * Upper level users of the IB drivers can use ib_register_client() to 3901da177e4SLinus Torvalds * register callbacks for IB device addition and removal. When an IB 3911da177e4SLinus Torvalds * device is added, each registered client's add method will be called 3921da177e4SLinus Torvalds * (in the order the clients were registered), and when a device is 3931da177e4SLinus Torvalds * removed, each client's remove method will be called (in the reverse 3941da177e4SLinus Torvalds * order that clients were registered). In addition, when 3951da177e4SLinus Torvalds * ib_register_client() is called, the client will receive an add 3961da177e4SLinus Torvalds * callback for all devices already registered. 3971da177e4SLinus Torvalds */ 3981da177e4SLinus Torvalds int ib_register_client(struct ib_client *client) 3991da177e4SLinus Torvalds { 4001da177e4SLinus Torvalds struct ib_device *device; 4011da177e4SLinus Torvalds 40295ed644fSIngo Molnar mutex_lock(&device_mutex); 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) 4051da177e4SLinus Torvalds if (client->add && !add_client_context(device, client)) 4061da177e4SLinus Torvalds client->add(device); 4071da177e4SLinus Torvalds 4085aa44bb9SHaggai Eran down_write(&lists_rwsem); 4095aa44bb9SHaggai Eran list_add_tail(&client->list, &client_list); 4105aa44bb9SHaggai Eran up_write(&lists_rwsem); 4115aa44bb9SHaggai Eran 41295ed644fSIngo Molnar mutex_unlock(&device_mutex); 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds return 0; 4151da177e4SLinus Torvalds } 4161da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_client); 4171da177e4SLinus Torvalds 4181da177e4SLinus Torvalds /** 4191da177e4SLinus Torvalds * ib_unregister_client - Unregister an IB client 4201da177e4SLinus Torvalds * @client:Client to unregister 4211da177e4SLinus Torvalds * 4221da177e4SLinus Torvalds * Upper level users use ib_unregister_client() to remove their client 4231da177e4SLinus Torvalds * registration. When ib_unregister_client() is called, the client 4241da177e4SLinus Torvalds * will receive a remove callback for each IB device still registered. 4251da177e4SLinus Torvalds */ 4261da177e4SLinus Torvalds void ib_unregister_client(struct ib_client *client) 4271da177e4SLinus Torvalds { 4281da177e4SLinus Torvalds struct ib_client_data *context, *tmp; 4291da177e4SLinus Torvalds struct ib_device *device; 4301da177e4SLinus Torvalds unsigned long flags; 4311da177e4SLinus Torvalds 43295ed644fSIngo Molnar mutex_lock(&device_mutex); 4331da177e4SLinus Torvalds 4345aa44bb9SHaggai Eran down_write(&lists_rwsem); 4355aa44bb9SHaggai Eran list_del(&client->list); 4365aa44bb9SHaggai Eran up_write(&lists_rwsem); 4375aa44bb9SHaggai Eran 4381da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) { 4397c1eb45aSHaggai Eran struct ib_client_data *found_context = NULL; 4401da177e4SLinus Torvalds 4417c1eb45aSHaggai Eran down_write(&lists_rwsem); 4421da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 4431da177e4SLinus Torvalds list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 4441da177e4SLinus Torvalds if (context->client == client) { 4457c1eb45aSHaggai Eran context->going_down = true; 4467c1eb45aSHaggai Eran found_context = context; 4477c1eb45aSHaggai Eran break; 4481da177e4SLinus Torvalds } 4491da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 4507c1eb45aSHaggai Eran up_write(&lists_rwsem); 4517c1eb45aSHaggai Eran 4527c1eb45aSHaggai Eran if (client->remove) 4537c1eb45aSHaggai Eran client->remove(device, found_context ? 4547c1eb45aSHaggai Eran found_context->data : NULL); 4557c1eb45aSHaggai Eran 4567c1eb45aSHaggai Eran if (!found_context) { 4577c1eb45aSHaggai Eran pr_warn("No client context found for %s/%s\n", 4587c1eb45aSHaggai Eran device->name, client->name); 4597c1eb45aSHaggai Eran continue; 4607c1eb45aSHaggai Eran } 4617c1eb45aSHaggai Eran 4627c1eb45aSHaggai Eran down_write(&lists_rwsem); 4637c1eb45aSHaggai Eran spin_lock_irqsave(&device->client_data_lock, flags); 4647c1eb45aSHaggai Eran list_del(&found_context->list); 4657c1eb45aSHaggai Eran kfree(found_context); 4667c1eb45aSHaggai Eran spin_unlock_irqrestore(&device->client_data_lock, flags); 4677c1eb45aSHaggai Eran up_write(&lists_rwsem); 4681da177e4SLinus Torvalds } 4691da177e4SLinus Torvalds 47095ed644fSIngo Molnar mutex_unlock(&device_mutex); 4711da177e4SLinus Torvalds } 4721da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_client); 4731da177e4SLinus Torvalds 4741da177e4SLinus Torvalds /** 4751da177e4SLinus Torvalds * ib_get_client_data - Get IB client context 4761da177e4SLinus Torvalds * @device:Device to get context for 4771da177e4SLinus Torvalds * @client:Client to get context for 4781da177e4SLinus Torvalds * 4791da177e4SLinus Torvalds * ib_get_client_data() returns client context set with 4801da177e4SLinus Torvalds * ib_set_client_data(). 4811da177e4SLinus Torvalds */ 4821da177e4SLinus Torvalds void *ib_get_client_data(struct ib_device *device, struct ib_client *client) 4831da177e4SLinus Torvalds { 4841da177e4SLinus Torvalds struct ib_client_data *context; 4851da177e4SLinus Torvalds void *ret = NULL; 4861da177e4SLinus Torvalds unsigned long flags; 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 4891da177e4SLinus Torvalds list_for_each_entry(context, &device->client_data_list, list) 4901da177e4SLinus Torvalds if (context->client == client) { 4911da177e4SLinus Torvalds ret = context->data; 4921da177e4SLinus Torvalds break; 4931da177e4SLinus Torvalds } 4941da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 4951da177e4SLinus Torvalds 4961da177e4SLinus Torvalds return ret; 4971da177e4SLinus Torvalds } 4981da177e4SLinus Torvalds EXPORT_SYMBOL(ib_get_client_data); 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds /** 5019cd330d3SKrishna Kumar * ib_set_client_data - Set IB client context 5021da177e4SLinus Torvalds * @device:Device to set context for 5031da177e4SLinus Torvalds * @client:Client to set context for 5041da177e4SLinus Torvalds * @data:Context to set 5051da177e4SLinus Torvalds * 5061da177e4SLinus Torvalds * ib_set_client_data() sets client context that can be retrieved with 5071da177e4SLinus Torvalds * ib_get_client_data(). 5081da177e4SLinus Torvalds */ 5091da177e4SLinus Torvalds void ib_set_client_data(struct ib_device *device, struct ib_client *client, 5101da177e4SLinus Torvalds void *data) 5111da177e4SLinus Torvalds { 5121da177e4SLinus Torvalds struct ib_client_data *context; 5131da177e4SLinus Torvalds unsigned long flags; 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 5161da177e4SLinus Torvalds list_for_each_entry(context, &device->client_data_list, list) 5171da177e4SLinus Torvalds if (context->client == client) { 5181da177e4SLinus Torvalds context->data = data; 5191da177e4SLinus Torvalds goto out; 5201da177e4SLinus Torvalds } 5211da177e4SLinus Torvalds 5221da177e4SLinus Torvalds printk(KERN_WARNING "No client context found for %s/%s\n", 5231da177e4SLinus Torvalds device->name, client->name); 5241da177e4SLinus Torvalds 5251da177e4SLinus Torvalds out: 5261da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 5271da177e4SLinus Torvalds } 5281da177e4SLinus Torvalds EXPORT_SYMBOL(ib_set_client_data); 5291da177e4SLinus Torvalds 5301da177e4SLinus Torvalds /** 5311da177e4SLinus Torvalds * ib_register_event_handler - Register an IB event handler 5321da177e4SLinus Torvalds * @event_handler:Handler to register 5331da177e4SLinus Torvalds * 5341da177e4SLinus Torvalds * ib_register_event_handler() registers an event handler that will be 5351da177e4SLinus Torvalds * called back when asynchronous IB events occur (as defined in 5361da177e4SLinus Torvalds * chapter 11 of the InfiniBand Architecture Specification). This 5371da177e4SLinus Torvalds * callback may occur in interrupt context. 5381da177e4SLinus Torvalds */ 5391da177e4SLinus Torvalds int ib_register_event_handler (struct ib_event_handler *event_handler) 5401da177e4SLinus Torvalds { 5411da177e4SLinus Torvalds unsigned long flags; 5421da177e4SLinus Torvalds 5431da177e4SLinus Torvalds spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); 5441da177e4SLinus Torvalds list_add_tail(&event_handler->list, 5451da177e4SLinus Torvalds &event_handler->device->event_handler_list); 5461da177e4SLinus Torvalds spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); 5471da177e4SLinus Torvalds 5481da177e4SLinus Torvalds return 0; 5491da177e4SLinus Torvalds } 5501da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_event_handler); 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds /** 5531da177e4SLinus Torvalds * ib_unregister_event_handler - Unregister an event handler 5541da177e4SLinus Torvalds * @event_handler:Handler to unregister 5551da177e4SLinus Torvalds * 5561da177e4SLinus Torvalds * Unregister an event handler registered with 5571da177e4SLinus Torvalds * ib_register_event_handler(). 5581da177e4SLinus Torvalds */ 5591da177e4SLinus Torvalds int ib_unregister_event_handler(struct ib_event_handler *event_handler) 5601da177e4SLinus Torvalds { 5611da177e4SLinus Torvalds unsigned long flags; 5621da177e4SLinus Torvalds 5631da177e4SLinus Torvalds spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); 5641da177e4SLinus Torvalds list_del(&event_handler->list); 5651da177e4SLinus Torvalds spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds return 0; 5681da177e4SLinus Torvalds } 5691da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_event_handler); 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds /** 5721da177e4SLinus Torvalds * ib_dispatch_event - Dispatch an asynchronous event 5731da177e4SLinus Torvalds * @event:Event to dispatch 5741da177e4SLinus Torvalds * 5751da177e4SLinus Torvalds * Low-level drivers must call ib_dispatch_event() to dispatch the 5761da177e4SLinus Torvalds * event to all registered event handlers when an asynchronous event 5771da177e4SLinus Torvalds * occurs. 5781da177e4SLinus Torvalds */ 5791da177e4SLinus Torvalds void ib_dispatch_event(struct ib_event *event) 5801da177e4SLinus Torvalds { 5811da177e4SLinus Torvalds unsigned long flags; 5821da177e4SLinus Torvalds struct ib_event_handler *handler; 5831da177e4SLinus Torvalds 5841da177e4SLinus Torvalds spin_lock_irqsave(&event->device->event_handler_lock, flags); 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds list_for_each_entry(handler, &event->device->event_handler_list, list) 5871da177e4SLinus Torvalds handler->handler(handler, event); 5881da177e4SLinus Torvalds 5891da177e4SLinus Torvalds spin_unlock_irqrestore(&event->device->event_handler_lock, flags); 5901da177e4SLinus Torvalds } 5911da177e4SLinus Torvalds EXPORT_SYMBOL(ib_dispatch_event); 5921da177e4SLinus Torvalds 5931da177e4SLinus Torvalds /** 5941da177e4SLinus Torvalds * ib_query_device - Query IB device attributes 5951da177e4SLinus Torvalds * @device:Device to query 5961da177e4SLinus Torvalds * @device_attr:Device attributes 5971da177e4SLinus Torvalds * 5981da177e4SLinus Torvalds * ib_query_device() returns the attributes of a device through the 5991da177e4SLinus Torvalds * @device_attr pointer. 6001da177e4SLinus Torvalds */ 6011da177e4SLinus Torvalds int ib_query_device(struct ib_device *device, 6021da177e4SLinus Torvalds struct ib_device_attr *device_attr) 6031da177e4SLinus Torvalds { 6042528e33eSMatan Barak struct ib_udata uhw = {.outlen = 0, .inlen = 0}; 6052528e33eSMatan Barak 60624306dc6SMatan Barak memset(device_attr, 0, sizeof(*device_attr)); 60724306dc6SMatan Barak 6082528e33eSMatan Barak return device->query_device(device, device_attr, &uhw); 6091da177e4SLinus Torvalds } 6101da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_device); 6111da177e4SLinus Torvalds 6121da177e4SLinus Torvalds /** 6131da177e4SLinus Torvalds * ib_query_port - Query IB port attributes 6141da177e4SLinus Torvalds * @device:Device to query 6151da177e4SLinus Torvalds * @port_num:Port number to query 6161da177e4SLinus Torvalds * @port_attr:Port attributes 6171da177e4SLinus Torvalds * 6181da177e4SLinus Torvalds * ib_query_port() returns the attributes of a port through the 6191da177e4SLinus Torvalds * @port_attr pointer. 6201da177e4SLinus Torvalds */ 6211da177e4SLinus Torvalds int ib_query_port(struct ib_device *device, 6221da177e4SLinus Torvalds u8 port_num, 6231da177e4SLinus Torvalds struct ib_port_attr *port_attr) 6241da177e4SLinus Torvalds { 6250cf18d77SIra Weiny if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) 626116c0074SRoland Dreier return -EINVAL; 627116c0074SRoland Dreier 6281da177e4SLinus Torvalds return device->query_port(device, port_num, port_attr); 6291da177e4SLinus Torvalds } 6301da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_port); 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds /** 6331da177e4SLinus Torvalds * ib_query_gid - Get GID table entry 6341da177e4SLinus Torvalds * @device:Device to query 6351da177e4SLinus Torvalds * @port_num:Port number to query 6361da177e4SLinus Torvalds * @index:GID table index to query 6371da177e4SLinus Torvalds * @gid:Returned GID 6381da177e4SLinus Torvalds * 6391da177e4SLinus Torvalds * ib_query_gid() fetches the specified GID table entry. 6401da177e4SLinus Torvalds */ 6411da177e4SLinus Torvalds int ib_query_gid(struct ib_device *device, 6421da177e4SLinus Torvalds u8 port_num, int index, union ib_gid *gid) 6431da177e4SLinus Torvalds { 6441da177e4SLinus Torvalds return device->query_gid(device, port_num, index, gid); 6451da177e4SLinus Torvalds } 6461da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_gid); 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds /** 6491da177e4SLinus Torvalds * ib_query_pkey - Get P_Key table entry 6501da177e4SLinus Torvalds * @device:Device to query 6511da177e4SLinus Torvalds * @port_num:Port number to query 6521da177e4SLinus Torvalds * @index:P_Key table index to query 6531da177e4SLinus Torvalds * @pkey:Returned P_Key 6541da177e4SLinus Torvalds * 6551da177e4SLinus Torvalds * ib_query_pkey() fetches the specified P_Key table entry. 6561da177e4SLinus Torvalds */ 6571da177e4SLinus Torvalds int ib_query_pkey(struct ib_device *device, 6581da177e4SLinus Torvalds u8 port_num, u16 index, u16 *pkey) 6591da177e4SLinus Torvalds { 6601da177e4SLinus Torvalds return device->query_pkey(device, port_num, index, pkey); 6611da177e4SLinus Torvalds } 6621da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_pkey); 6631da177e4SLinus Torvalds 6641da177e4SLinus Torvalds /** 6651da177e4SLinus Torvalds * ib_modify_device - Change IB device attributes 6661da177e4SLinus Torvalds * @device:Device to modify 6671da177e4SLinus Torvalds * @device_modify_mask:Mask of attributes to change 6681da177e4SLinus Torvalds * @device_modify:New attribute values 6691da177e4SLinus Torvalds * 6701da177e4SLinus Torvalds * ib_modify_device() changes a device's attributes as specified by 6711da177e4SLinus Torvalds * the @device_modify_mask and @device_modify structure. 6721da177e4SLinus Torvalds */ 6731da177e4SLinus Torvalds int ib_modify_device(struct ib_device *device, 6741da177e4SLinus Torvalds int device_modify_mask, 6751da177e4SLinus Torvalds struct ib_device_modify *device_modify) 6761da177e4SLinus Torvalds { 67710e1b54bSBart Van Assche if (!device->modify_device) 67810e1b54bSBart Van Assche return -ENOSYS; 67910e1b54bSBart Van Assche 6801da177e4SLinus Torvalds return device->modify_device(device, device_modify_mask, 6811da177e4SLinus Torvalds device_modify); 6821da177e4SLinus Torvalds } 6831da177e4SLinus Torvalds EXPORT_SYMBOL(ib_modify_device); 6841da177e4SLinus Torvalds 6851da177e4SLinus Torvalds /** 6861da177e4SLinus Torvalds * ib_modify_port - Modifies the attributes for the specified port. 6871da177e4SLinus Torvalds * @device: The device to modify. 6881da177e4SLinus Torvalds * @port_num: The number of the port to modify. 6891da177e4SLinus Torvalds * @port_modify_mask: Mask used to specify which attributes of the port 6901da177e4SLinus Torvalds * to change. 6911da177e4SLinus Torvalds * @port_modify: New attribute values for the port. 6921da177e4SLinus Torvalds * 6931da177e4SLinus Torvalds * ib_modify_port() changes a port's attributes as specified by the 6941da177e4SLinus Torvalds * @port_modify_mask and @port_modify structure. 6951da177e4SLinus Torvalds */ 6961da177e4SLinus Torvalds int ib_modify_port(struct ib_device *device, 6971da177e4SLinus Torvalds u8 port_num, int port_modify_mask, 6981da177e4SLinus Torvalds struct ib_port_modify *port_modify) 6991da177e4SLinus Torvalds { 70010e1b54bSBart Van Assche if (!device->modify_port) 70110e1b54bSBart Van Assche return -ENOSYS; 70210e1b54bSBart Van Assche 7030cf18d77SIra Weiny if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) 704116c0074SRoland Dreier return -EINVAL; 705116c0074SRoland Dreier 7061da177e4SLinus Torvalds return device->modify_port(device, port_num, port_modify_mask, 7071da177e4SLinus Torvalds port_modify); 7081da177e4SLinus Torvalds } 7091da177e4SLinus Torvalds EXPORT_SYMBOL(ib_modify_port); 7101da177e4SLinus Torvalds 7115eb620c8SYosef Etigin /** 7125eb620c8SYosef Etigin * ib_find_gid - Returns the port number and GID table index where 7135eb620c8SYosef Etigin * a specified GID value occurs. 7145eb620c8SYosef Etigin * @device: The device to query. 7155eb620c8SYosef Etigin * @gid: The GID value to search for. 7165eb620c8SYosef Etigin * @port_num: The port number of the device where the GID value was found. 7175eb620c8SYosef Etigin * @index: The index into the GID table where the GID was found. This 7185eb620c8SYosef Etigin * parameter may be NULL. 7195eb620c8SYosef Etigin */ 7205eb620c8SYosef Etigin int ib_find_gid(struct ib_device *device, union ib_gid *gid, 7215eb620c8SYosef Etigin u8 *port_num, u16 *index) 7225eb620c8SYosef Etigin { 7235eb620c8SYosef Etigin union ib_gid tmp_gid; 7245eb620c8SYosef Etigin int ret, port, i; 7255eb620c8SYosef Etigin 7260cf18d77SIra Weiny for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) { 7277738613eSIra Weiny for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) { 7285eb620c8SYosef Etigin ret = ib_query_gid(device, port, i, &tmp_gid); 7295eb620c8SYosef Etigin if (ret) 7305eb620c8SYosef Etigin return ret; 7315eb620c8SYosef Etigin if (!memcmp(&tmp_gid, gid, sizeof *gid)) { 7325eb620c8SYosef Etigin *port_num = port; 7335eb620c8SYosef Etigin if (index) 7345eb620c8SYosef Etigin *index = i; 7355eb620c8SYosef Etigin return 0; 7365eb620c8SYosef Etigin } 7375eb620c8SYosef Etigin } 7385eb620c8SYosef Etigin } 7395eb620c8SYosef Etigin 7405eb620c8SYosef Etigin return -ENOENT; 7415eb620c8SYosef Etigin } 7425eb620c8SYosef Etigin EXPORT_SYMBOL(ib_find_gid); 7435eb620c8SYosef Etigin 7445eb620c8SYosef Etigin /** 7455eb620c8SYosef Etigin * ib_find_pkey - Returns the PKey table index where a specified 7465eb620c8SYosef Etigin * PKey value occurs. 7475eb620c8SYosef Etigin * @device: The device to query. 7485eb620c8SYosef Etigin * @port_num: The port number of the device to search for the PKey. 7495eb620c8SYosef Etigin * @pkey: The PKey value to search for. 7505eb620c8SYosef Etigin * @index: The index into the PKey table where the PKey was found. 7515eb620c8SYosef Etigin */ 7525eb620c8SYosef Etigin int ib_find_pkey(struct ib_device *device, 7535eb620c8SYosef Etigin u8 port_num, u16 pkey, u16 *index) 7545eb620c8SYosef Etigin { 7555eb620c8SYosef Etigin int ret, i; 7565eb620c8SYosef Etigin u16 tmp_pkey; 757ff7166c4SJack Morgenstein int partial_ix = -1; 7585eb620c8SYosef Etigin 7597738613eSIra Weiny for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) { 7605eb620c8SYosef Etigin ret = ib_query_pkey(device, port_num, i, &tmp_pkey); 7615eb620c8SYosef Etigin if (ret) 7625eb620c8SYosef Etigin return ret; 76336026eccSMoni Shoua if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) { 764ff7166c4SJack Morgenstein /* if there is full-member pkey take it.*/ 765ff7166c4SJack Morgenstein if (tmp_pkey & 0x8000) { 7665eb620c8SYosef Etigin *index = i; 7675eb620c8SYosef Etigin return 0; 7685eb620c8SYosef Etigin } 769ff7166c4SJack Morgenstein if (partial_ix < 0) 770ff7166c4SJack Morgenstein partial_ix = i; 771ff7166c4SJack Morgenstein } 7725eb620c8SYosef Etigin } 7735eb620c8SYosef Etigin 774ff7166c4SJack Morgenstein /*no full-member, if exists take the limited*/ 775ff7166c4SJack Morgenstein if (partial_ix >= 0) { 776ff7166c4SJack Morgenstein *index = partial_ix; 777ff7166c4SJack Morgenstein return 0; 778ff7166c4SJack Morgenstein } 7795eb620c8SYosef Etigin return -ENOENT; 7805eb620c8SYosef Etigin } 7815eb620c8SYosef Etigin EXPORT_SYMBOL(ib_find_pkey); 7825eb620c8SYosef Etigin 7831da177e4SLinus Torvalds static int __init ib_core_init(void) 7841da177e4SLinus Torvalds { 7851da177e4SLinus Torvalds int ret; 7861da177e4SLinus Torvalds 787f0626710STejun Heo ib_wq = alloc_workqueue("infiniband", 0, 0); 788f0626710STejun Heo if (!ib_wq) 789f0626710STejun Heo return -ENOMEM; 790f0626710STejun Heo 7911da177e4SLinus Torvalds ret = ib_sysfs_setup(); 792fd75c789SNir Muchtar if (ret) { 7931da177e4SLinus Torvalds printk(KERN_WARNING "Couldn't create InfiniBand device class\n"); 794fd75c789SNir Muchtar goto err; 795fd75c789SNir Muchtar } 7961da177e4SLinus Torvalds 797b2cbae2cSRoland Dreier ret = ibnl_init(); 7981da177e4SLinus Torvalds if (ret) { 799b2cbae2cSRoland Dreier printk(KERN_WARNING "Couldn't init IB netlink interface\n"); 800fd75c789SNir Muchtar goto err_sysfs; 8011da177e4SLinus Torvalds } 8021da177e4SLinus Torvalds 803b2cbae2cSRoland Dreier ret = ib_cache_setup(); 804b2cbae2cSRoland Dreier if (ret) { 805b2cbae2cSRoland Dreier printk(KERN_WARNING "Couldn't set up InfiniBand P_Key/GID cache\n"); 806b2cbae2cSRoland Dreier goto err_nl; 807b2cbae2cSRoland Dreier } 808b2cbae2cSRoland Dreier 809fd75c789SNir Muchtar return 0; 810fd75c789SNir Muchtar 811b2cbae2cSRoland Dreier err_nl: 812b2cbae2cSRoland Dreier ibnl_cleanup(); 813b2cbae2cSRoland Dreier 814fd75c789SNir Muchtar err_sysfs: 815fd75c789SNir Muchtar ib_sysfs_cleanup(); 816fd75c789SNir Muchtar 817fd75c789SNir Muchtar err: 818fd75c789SNir Muchtar destroy_workqueue(ib_wq); 8191da177e4SLinus Torvalds return ret; 8201da177e4SLinus Torvalds } 8211da177e4SLinus Torvalds 8221da177e4SLinus Torvalds static void __exit ib_core_cleanup(void) 8231da177e4SLinus Torvalds { 8241da177e4SLinus Torvalds ib_cache_cleanup(); 825b2cbae2cSRoland Dreier ibnl_cleanup(); 8261da177e4SLinus Torvalds ib_sysfs_cleanup(); 827f7c6a7b5SRoland Dreier /* Make sure that any pending umem accounting work is done. */ 828f0626710STejun Heo destroy_workqueue(ib_wq); 8291da177e4SLinus Torvalds } 8301da177e4SLinus Torvalds 8311da177e4SLinus Torvalds module_init(ib_core_init); 8321da177e4SLinus Torvalds module_exit(ib_core_cleanup); 833