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 * $Id: device.c 1349 2004-12-16 21:09:43Z roland $ 341da177e4SLinus Torvalds */ 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds #include <linux/module.h> 371da177e4SLinus Torvalds #include <linux/string.h> 381da177e4SLinus Torvalds #include <linux/errno.h> 399a6b090cSAhmed S. Darwish #include <linux/kernel.h> 401da177e4SLinus Torvalds #include <linux/slab.h> 411da177e4SLinus Torvalds #include <linux/init.h> 4295ed644fSIngo Molnar #include <linux/mutex.h> 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds #include "core_priv.h" 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds MODULE_AUTHOR("Roland Dreier"); 471da177e4SLinus Torvalds MODULE_DESCRIPTION("core kernel InfiniBand API"); 481da177e4SLinus Torvalds MODULE_LICENSE("Dual BSD/GPL"); 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds struct ib_client_data { 511da177e4SLinus Torvalds struct list_head list; 521da177e4SLinus Torvalds struct ib_client *client; 531da177e4SLinus Torvalds void * data; 541da177e4SLinus Torvalds }; 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds static LIST_HEAD(device_list); 571da177e4SLinus Torvalds static LIST_HEAD(client_list); 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds /* 6095ed644fSIngo Molnar * device_mutex protects access to both device_list and client_list. 611da177e4SLinus Torvalds * There's no real point to using multiple locks or something fancier 621da177e4SLinus Torvalds * like an rwsem: we always access both lists, and we're always 631da177e4SLinus Torvalds * modifying one list or the other list. In any case this is not a 641da177e4SLinus Torvalds * hot path so there's no point in trying to optimize. 651da177e4SLinus Torvalds */ 6695ed644fSIngo Molnar static DEFINE_MUTEX(device_mutex); 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds static int ib_device_check_mandatory(struct ib_device *device) 691da177e4SLinus Torvalds { 701da177e4SLinus Torvalds #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x } 711da177e4SLinus Torvalds static const struct { 721da177e4SLinus Torvalds size_t offset; 731da177e4SLinus Torvalds char *name; 741da177e4SLinus Torvalds } mandatory_table[] = { 751da177e4SLinus Torvalds IB_MANDATORY_FUNC(query_device), 761da177e4SLinus Torvalds IB_MANDATORY_FUNC(query_port), 771da177e4SLinus Torvalds IB_MANDATORY_FUNC(query_pkey), 781da177e4SLinus Torvalds IB_MANDATORY_FUNC(query_gid), 791da177e4SLinus Torvalds IB_MANDATORY_FUNC(alloc_pd), 801da177e4SLinus Torvalds IB_MANDATORY_FUNC(dealloc_pd), 811da177e4SLinus Torvalds IB_MANDATORY_FUNC(create_ah), 821da177e4SLinus Torvalds IB_MANDATORY_FUNC(destroy_ah), 831da177e4SLinus Torvalds IB_MANDATORY_FUNC(create_qp), 841da177e4SLinus Torvalds IB_MANDATORY_FUNC(modify_qp), 851da177e4SLinus Torvalds IB_MANDATORY_FUNC(destroy_qp), 861da177e4SLinus Torvalds IB_MANDATORY_FUNC(post_send), 871da177e4SLinus Torvalds IB_MANDATORY_FUNC(post_recv), 881da177e4SLinus Torvalds IB_MANDATORY_FUNC(create_cq), 891da177e4SLinus Torvalds IB_MANDATORY_FUNC(destroy_cq), 901da177e4SLinus Torvalds IB_MANDATORY_FUNC(poll_cq), 911da177e4SLinus Torvalds IB_MANDATORY_FUNC(req_notify_cq), 921da177e4SLinus Torvalds IB_MANDATORY_FUNC(get_dma_mr), 931da177e4SLinus Torvalds IB_MANDATORY_FUNC(dereg_mr) 941da177e4SLinus Torvalds }; 951da177e4SLinus Torvalds int i; 961da177e4SLinus Torvalds 979a6b090cSAhmed S. Darwish for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) { 981da177e4SLinus Torvalds if (!*(void **) ((void *) device + mandatory_table[i].offset)) { 991da177e4SLinus Torvalds printk(KERN_WARNING "Device %s is missing mandatory function %s\n", 1001da177e4SLinus Torvalds device->name, mandatory_table[i].name); 1011da177e4SLinus Torvalds return -EINVAL; 1021da177e4SLinus Torvalds } 1031da177e4SLinus Torvalds } 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds return 0; 1061da177e4SLinus Torvalds } 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds static struct ib_device *__ib_device_get_by_name(const char *name) 1091da177e4SLinus Torvalds { 1101da177e4SLinus Torvalds struct ib_device *device; 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) 1131da177e4SLinus Torvalds if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX)) 1141da177e4SLinus Torvalds return device; 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds return NULL; 1171da177e4SLinus Torvalds } 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds static int alloc_name(char *name) 1211da177e4SLinus Torvalds { 1221da177e4SLinus Torvalds long *inuse; 1231da177e4SLinus Torvalds char buf[IB_DEVICE_NAME_MAX]; 1241da177e4SLinus Torvalds struct ib_device *device; 1251da177e4SLinus Torvalds int i; 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds inuse = (long *) get_zeroed_page(GFP_KERNEL); 1281da177e4SLinus Torvalds if (!inuse) 1291da177e4SLinus Torvalds return -ENOMEM; 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) { 1321da177e4SLinus Torvalds if (!sscanf(device->name, name, &i)) 1331da177e4SLinus Torvalds continue; 1341da177e4SLinus Torvalds if (i < 0 || i >= PAGE_SIZE * 8) 1351da177e4SLinus Torvalds continue; 1361da177e4SLinus Torvalds snprintf(buf, sizeof buf, name, i); 1371da177e4SLinus Torvalds if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX)) 1381da177e4SLinus Torvalds set_bit(i, inuse); 1391da177e4SLinus Torvalds } 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds i = find_first_zero_bit(inuse, PAGE_SIZE * 8); 1421da177e4SLinus Torvalds free_page((unsigned long) inuse); 1431da177e4SLinus Torvalds snprintf(buf, sizeof buf, name, i); 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds if (__ib_device_get_by_name(buf)) 1461da177e4SLinus Torvalds return -ENFILE; 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds strlcpy(name, buf, IB_DEVICE_NAME_MAX); 1491da177e4SLinus Torvalds return 0; 1501da177e4SLinus Torvalds } 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds /** 1531da177e4SLinus Torvalds * ib_alloc_device - allocate an IB device struct 1541da177e4SLinus Torvalds * @size:size of structure to allocate 1551da177e4SLinus Torvalds * 1561da177e4SLinus Torvalds * Low-level drivers should use ib_alloc_device() to allocate &struct 1571da177e4SLinus Torvalds * ib_device. @size is the size of the structure to be allocated, 1581da177e4SLinus Torvalds * including any private data used by the low-level driver. 1591da177e4SLinus Torvalds * ib_dealloc_device() must be used to free structures allocated with 1601da177e4SLinus Torvalds * ib_alloc_device(). 1611da177e4SLinus Torvalds */ 1621da177e4SLinus Torvalds struct ib_device *ib_alloc_device(size_t size) 1631da177e4SLinus Torvalds { 1641da177e4SLinus Torvalds BUG_ON(size < sizeof (struct ib_device)); 1651da177e4SLinus Torvalds 166de6eb66bSRoland Dreier return kzalloc(size, GFP_KERNEL); 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds EXPORT_SYMBOL(ib_alloc_device); 1691da177e4SLinus Torvalds 1701da177e4SLinus Torvalds /** 1711da177e4SLinus Torvalds * ib_dealloc_device - free an IB device struct 1721da177e4SLinus Torvalds * @device:structure to free 1731da177e4SLinus Torvalds * 1741da177e4SLinus Torvalds * Free a structure allocated with ib_alloc_device(). 1751da177e4SLinus Torvalds */ 1761da177e4SLinus Torvalds void ib_dealloc_device(struct ib_device *device) 1771da177e4SLinus Torvalds { 1781da177e4SLinus Torvalds if (device->reg_state == IB_DEV_UNINITIALIZED) { 1791da177e4SLinus Torvalds kfree(device); 1801da177e4SLinus Torvalds return; 1811da177e4SLinus Torvalds } 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds BUG_ON(device->reg_state != IB_DEV_UNREGISTERED); 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds ib_device_unregister_sysfs(device); 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds EXPORT_SYMBOL(ib_dealloc_device); 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds static int add_client_context(struct ib_device *device, struct ib_client *client) 1901da177e4SLinus Torvalds { 1911da177e4SLinus Torvalds struct ib_client_data *context; 1921da177e4SLinus Torvalds unsigned long flags; 1931da177e4SLinus Torvalds 1941da177e4SLinus Torvalds context = kmalloc(sizeof *context, GFP_KERNEL); 1951da177e4SLinus Torvalds if (!context) { 1961da177e4SLinus Torvalds printk(KERN_WARNING "Couldn't allocate client context for %s/%s\n", 1971da177e4SLinus Torvalds device->name, client->name); 1981da177e4SLinus Torvalds return -ENOMEM; 1991da177e4SLinus Torvalds } 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvalds context->client = client; 2021da177e4SLinus Torvalds context->data = NULL; 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 2051da177e4SLinus Torvalds list_add(&context->list, &device->client_data_list); 2061da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds return 0; 2091da177e4SLinus Torvalds } 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds /** 2121da177e4SLinus Torvalds * ib_register_device - Register an IB device with IB core 2131da177e4SLinus Torvalds * @device:Device to register 2141da177e4SLinus Torvalds * 2151da177e4SLinus Torvalds * Low-level drivers use ib_register_device() to register their 2161da177e4SLinus Torvalds * devices with the IB core. All registered clients will receive a 2171da177e4SLinus Torvalds * callback for each device that is added. @device must be allocated 2181da177e4SLinus Torvalds * with ib_alloc_device(). 2191da177e4SLinus Torvalds */ 2201da177e4SLinus Torvalds int ib_register_device(struct ib_device *device) 2211da177e4SLinus Torvalds { 2221da177e4SLinus Torvalds int ret; 2231da177e4SLinus Torvalds 22495ed644fSIngo Molnar mutex_lock(&device_mutex); 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvalds if (strchr(device->name, '%')) { 2271da177e4SLinus Torvalds ret = alloc_name(device->name); 2281da177e4SLinus Torvalds if (ret) 2291da177e4SLinus Torvalds goto out; 2301da177e4SLinus Torvalds } 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds if (ib_device_check_mandatory(device)) { 2331da177e4SLinus Torvalds ret = -EINVAL; 2341da177e4SLinus Torvalds goto out; 2351da177e4SLinus Torvalds } 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds INIT_LIST_HEAD(&device->event_handler_list); 2381da177e4SLinus Torvalds INIT_LIST_HEAD(&device->client_data_list); 2391da177e4SLinus Torvalds spin_lock_init(&device->event_handler_lock); 2401da177e4SLinus Torvalds spin_lock_init(&device->client_data_lock); 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds ret = ib_device_register_sysfs(device); 2431da177e4SLinus Torvalds if (ret) { 2441da177e4SLinus Torvalds printk(KERN_WARNING "Couldn't register device %s with driver model\n", 2451da177e4SLinus Torvalds device->name); 2461da177e4SLinus Torvalds goto out; 2471da177e4SLinus Torvalds } 2481da177e4SLinus Torvalds 2491da177e4SLinus Torvalds list_add_tail(&device->core_list, &device_list); 2501da177e4SLinus Torvalds 2511da177e4SLinus Torvalds device->reg_state = IB_DEV_REGISTERED; 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvalds { 2541da177e4SLinus Torvalds struct ib_client *client; 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds list_for_each_entry(client, &client_list, list) 2571da177e4SLinus Torvalds if (client->add && !add_client_context(device, client)) 2581da177e4SLinus Torvalds client->add(device); 2591da177e4SLinus Torvalds } 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds out: 26295ed644fSIngo Molnar mutex_unlock(&device_mutex); 2631da177e4SLinus Torvalds return ret; 2641da177e4SLinus Torvalds } 2651da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_device); 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds /** 2681da177e4SLinus Torvalds * ib_unregister_device - Unregister an IB device 2691da177e4SLinus Torvalds * @device:Device to unregister 2701da177e4SLinus Torvalds * 2711da177e4SLinus Torvalds * Unregister an IB device. All clients will receive a remove callback. 2721da177e4SLinus Torvalds */ 2731da177e4SLinus Torvalds void ib_unregister_device(struct ib_device *device) 2741da177e4SLinus Torvalds { 2751da177e4SLinus Torvalds struct ib_client *client; 2761da177e4SLinus Torvalds struct ib_client_data *context, *tmp; 2771da177e4SLinus Torvalds unsigned long flags; 2781da177e4SLinus Torvalds 27995ed644fSIngo Molnar mutex_lock(&device_mutex); 2801da177e4SLinus Torvalds 2811da177e4SLinus Torvalds list_for_each_entry_reverse(client, &client_list, list) 2821da177e4SLinus Torvalds if (client->remove) 2831da177e4SLinus Torvalds client->remove(device); 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds list_del(&device->core_list); 2861da177e4SLinus Torvalds 28795ed644fSIngo Molnar mutex_unlock(&device_mutex); 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 2901da177e4SLinus Torvalds list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 2911da177e4SLinus Torvalds kfree(context); 2921da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds device->reg_state = IB_DEV_UNREGISTERED; 2951da177e4SLinus Torvalds } 2961da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_device); 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds /** 2991da177e4SLinus Torvalds * ib_register_client - Register an IB client 3001da177e4SLinus Torvalds * @client:Client to register 3011da177e4SLinus Torvalds * 3021da177e4SLinus Torvalds * Upper level users of the IB drivers can use ib_register_client() to 3031da177e4SLinus Torvalds * register callbacks for IB device addition and removal. When an IB 3041da177e4SLinus Torvalds * device is added, each registered client's add method will be called 3051da177e4SLinus Torvalds * (in the order the clients were registered), and when a device is 3061da177e4SLinus Torvalds * removed, each client's remove method will be called (in the reverse 3071da177e4SLinus Torvalds * order that clients were registered). In addition, when 3081da177e4SLinus Torvalds * ib_register_client() is called, the client will receive an add 3091da177e4SLinus Torvalds * callback for all devices already registered. 3101da177e4SLinus Torvalds */ 3111da177e4SLinus Torvalds int ib_register_client(struct ib_client *client) 3121da177e4SLinus Torvalds { 3131da177e4SLinus Torvalds struct ib_device *device; 3141da177e4SLinus Torvalds 31595ed644fSIngo Molnar mutex_lock(&device_mutex); 3161da177e4SLinus Torvalds 3171da177e4SLinus Torvalds list_add_tail(&client->list, &client_list); 3181da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) 3191da177e4SLinus Torvalds if (client->add && !add_client_context(device, client)) 3201da177e4SLinus Torvalds client->add(device); 3211da177e4SLinus Torvalds 32295ed644fSIngo Molnar mutex_unlock(&device_mutex); 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds return 0; 3251da177e4SLinus Torvalds } 3261da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_client); 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds /** 3291da177e4SLinus Torvalds * ib_unregister_client - Unregister an IB client 3301da177e4SLinus Torvalds * @client:Client to unregister 3311da177e4SLinus Torvalds * 3321da177e4SLinus Torvalds * Upper level users use ib_unregister_client() to remove their client 3331da177e4SLinus Torvalds * registration. When ib_unregister_client() is called, the client 3341da177e4SLinus Torvalds * will receive a remove callback for each IB device still registered. 3351da177e4SLinus Torvalds */ 3361da177e4SLinus Torvalds void ib_unregister_client(struct ib_client *client) 3371da177e4SLinus Torvalds { 3381da177e4SLinus Torvalds struct ib_client_data *context, *tmp; 3391da177e4SLinus Torvalds struct ib_device *device; 3401da177e4SLinus Torvalds unsigned long flags; 3411da177e4SLinus Torvalds 34295ed644fSIngo Molnar mutex_lock(&device_mutex); 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) { 3451da177e4SLinus Torvalds if (client->remove) 3461da177e4SLinus Torvalds client->remove(device); 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 3491da177e4SLinus Torvalds list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 3501da177e4SLinus Torvalds if (context->client == client) { 3511da177e4SLinus Torvalds list_del(&context->list); 3521da177e4SLinus Torvalds kfree(context); 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 3551da177e4SLinus Torvalds } 3561da177e4SLinus Torvalds list_del(&client->list); 3571da177e4SLinus Torvalds 35895ed644fSIngo Molnar mutex_unlock(&device_mutex); 3591da177e4SLinus Torvalds } 3601da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_client); 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds /** 3631da177e4SLinus Torvalds * ib_get_client_data - Get IB client context 3641da177e4SLinus Torvalds * @device:Device to get context for 3651da177e4SLinus Torvalds * @client:Client to get context for 3661da177e4SLinus Torvalds * 3671da177e4SLinus Torvalds * ib_get_client_data() returns client context set with 3681da177e4SLinus Torvalds * ib_set_client_data(). 3691da177e4SLinus Torvalds */ 3701da177e4SLinus Torvalds void *ib_get_client_data(struct ib_device *device, struct ib_client *client) 3711da177e4SLinus Torvalds { 3721da177e4SLinus Torvalds struct ib_client_data *context; 3731da177e4SLinus Torvalds void *ret = NULL; 3741da177e4SLinus Torvalds unsigned long flags; 3751da177e4SLinus Torvalds 3761da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 3771da177e4SLinus Torvalds list_for_each_entry(context, &device->client_data_list, list) 3781da177e4SLinus Torvalds if (context->client == client) { 3791da177e4SLinus Torvalds ret = context->data; 3801da177e4SLinus Torvalds break; 3811da177e4SLinus Torvalds } 3821da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 3831da177e4SLinus Torvalds 3841da177e4SLinus Torvalds return ret; 3851da177e4SLinus Torvalds } 3861da177e4SLinus Torvalds EXPORT_SYMBOL(ib_get_client_data); 3871da177e4SLinus Torvalds 3881da177e4SLinus Torvalds /** 3899cd330d3SKrishna Kumar * ib_set_client_data - Set IB client context 3901da177e4SLinus Torvalds * @device:Device to set context for 3911da177e4SLinus Torvalds * @client:Client to set context for 3921da177e4SLinus Torvalds * @data:Context to set 3931da177e4SLinus Torvalds * 3941da177e4SLinus Torvalds * ib_set_client_data() sets client context that can be retrieved with 3951da177e4SLinus Torvalds * ib_get_client_data(). 3961da177e4SLinus Torvalds */ 3971da177e4SLinus Torvalds void ib_set_client_data(struct ib_device *device, struct ib_client *client, 3981da177e4SLinus Torvalds void *data) 3991da177e4SLinus Torvalds { 4001da177e4SLinus Torvalds struct ib_client_data *context; 4011da177e4SLinus Torvalds unsigned long flags; 4021da177e4SLinus Torvalds 4031da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 4041da177e4SLinus Torvalds list_for_each_entry(context, &device->client_data_list, list) 4051da177e4SLinus Torvalds if (context->client == client) { 4061da177e4SLinus Torvalds context->data = data; 4071da177e4SLinus Torvalds goto out; 4081da177e4SLinus Torvalds } 4091da177e4SLinus Torvalds 4101da177e4SLinus Torvalds printk(KERN_WARNING "No client context found for %s/%s\n", 4111da177e4SLinus Torvalds device->name, client->name); 4121da177e4SLinus Torvalds 4131da177e4SLinus Torvalds out: 4141da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 4151da177e4SLinus Torvalds } 4161da177e4SLinus Torvalds EXPORT_SYMBOL(ib_set_client_data); 4171da177e4SLinus Torvalds 4181da177e4SLinus Torvalds /** 4191da177e4SLinus Torvalds * ib_register_event_handler - Register an IB event handler 4201da177e4SLinus Torvalds * @event_handler:Handler to register 4211da177e4SLinus Torvalds * 4221da177e4SLinus Torvalds * ib_register_event_handler() registers an event handler that will be 4231da177e4SLinus Torvalds * called back when asynchronous IB events occur (as defined in 4241da177e4SLinus Torvalds * chapter 11 of the InfiniBand Architecture Specification). This 4251da177e4SLinus Torvalds * callback may occur in interrupt context. 4261da177e4SLinus Torvalds */ 4271da177e4SLinus Torvalds int ib_register_event_handler (struct ib_event_handler *event_handler) 4281da177e4SLinus Torvalds { 4291da177e4SLinus Torvalds unsigned long flags; 4301da177e4SLinus Torvalds 4311da177e4SLinus Torvalds spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); 4321da177e4SLinus Torvalds list_add_tail(&event_handler->list, 4331da177e4SLinus Torvalds &event_handler->device->event_handler_list); 4341da177e4SLinus Torvalds spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds return 0; 4371da177e4SLinus Torvalds } 4381da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_event_handler); 4391da177e4SLinus Torvalds 4401da177e4SLinus Torvalds /** 4411da177e4SLinus Torvalds * ib_unregister_event_handler - Unregister an event handler 4421da177e4SLinus Torvalds * @event_handler:Handler to unregister 4431da177e4SLinus Torvalds * 4441da177e4SLinus Torvalds * Unregister an event handler registered with 4451da177e4SLinus Torvalds * ib_register_event_handler(). 4461da177e4SLinus Torvalds */ 4471da177e4SLinus Torvalds int ib_unregister_event_handler(struct ib_event_handler *event_handler) 4481da177e4SLinus Torvalds { 4491da177e4SLinus Torvalds unsigned long flags; 4501da177e4SLinus Torvalds 4511da177e4SLinus Torvalds spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); 4521da177e4SLinus Torvalds list_del(&event_handler->list); 4531da177e4SLinus Torvalds spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds return 0; 4561da177e4SLinus Torvalds } 4571da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_event_handler); 4581da177e4SLinus Torvalds 4591da177e4SLinus Torvalds /** 4601da177e4SLinus Torvalds * ib_dispatch_event - Dispatch an asynchronous event 4611da177e4SLinus Torvalds * @event:Event to dispatch 4621da177e4SLinus Torvalds * 4631da177e4SLinus Torvalds * Low-level drivers must call ib_dispatch_event() to dispatch the 4641da177e4SLinus Torvalds * event to all registered event handlers when an asynchronous event 4651da177e4SLinus Torvalds * occurs. 4661da177e4SLinus Torvalds */ 4671da177e4SLinus Torvalds void ib_dispatch_event(struct ib_event *event) 4681da177e4SLinus Torvalds { 4691da177e4SLinus Torvalds unsigned long flags; 4701da177e4SLinus Torvalds struct ib_event_handler *handler; 4711da177e4SLinus Torvalds 4721da177e4SLinus Torvalds spin_lock_irqsave(&event->device->event_handler_lock, flags); 4731da177e4SLinus Torvalds 4741da177e4SLinus Torvalds list_for_each_entry(handler, &event->device->event_handler_list, list) 4751da177e4SLinus Torvalds handler->handler(handler, event); 4761da177e4SLinus Torvalds 4771da177e4SLinus Torvalds spin_unlock_irqrestore(&event->device->event_handler_lock, flags); 4781da177e4SLinus Torvalds } 4791da177e4SLinus Torvalds EXPORT_SYMBOL(ib_dispatch_event); 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds /** 4821da177e4SLinus Torvalds * ib_query_device - Query IB device attributes 4831da177e4SLinus Torvalds * @device:Device to query 4841da177e4SLinus Torvalds * @device_attr:Device attributes 4851da177e4SLinus Torvalds * 4861da177e4SLinus Torvalds * ib_query_device() returns the attributes of a device through the 4871da177e4SLinus Torvalds * @device_attr pointer. 4881da177e4SLinus Torvalds */ 4891da177e4SLinus Torvalds int ib_query_device(struct ib_device *device, 4901da177e4SLinus Torvalds struct ib_device_attr *device_attr) 4911da177e4SLinus Torvalds { 4921da177e4SLinus Torvalds return device->query_device(device, device_attr); 4931da177e4SLinus Torvalds } 4941da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_device); 4951da177e4SLinus Torvalds 4961da177e4SLinus Torvalds /** 4971da177e4SLinus Torvalds * ib_query_port - Query IB port attributes 4981da177e4SLinus Torvalds * @device:Device to query 4991da177e4SLinus Torvalds * @port_num:Port number to query 5001da177e4SLinus Torvalds * @port_attr:Port attributes 5011da177e4SLinus Torvalds * 5021da177e4SLinus Torvalds * ib_query_port() returns the attributes of a port through the 5031da177e4SLinus Torvalds * @port_attr pointer. 5041da177e4SLinus Torvalds */ 5051da177e4SLinus Torvalds int ib_query_port(struct ib_device *device, 5061da177e4SLinus Torvalds u8 port_num, 5071da177e4SLinus Torvalds struct ib_port_attr *port_attr) 5081da177e4SLinus Torvalds { 50907ebafbaSTom Tucker if (device->node_type == RDMA_NODE_IB_SWITCH) { 510116c0074SRoland Dreier if (port_num) 511116c0074SRoland Dreier return -EINVAL; 512116c0074SRoland Dreier } else if (port_num < 1 || port_num > device->phys_port_cnt) 513116c0074SRoland Dreier return -EINVAL; 514116c0074SRoland Dreier 5151da177e4SLinus Torvalds return device->query_port(device, port_num, port_attr); 5161da177e4SLinus Torvalds } 5171da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_port); 5181da177e4SLinus Torvalds 5191da177e4SLinus Torvalds /** 5201da177e4SLinus Torvalds * ib_query_gid - Get GID table entry 5211da177e4SLinus Torvalds * @device:Device to query 5221da177e4SLinus Torvalds * @port_num:Port number to query 5231da177e4SLinus Torvalds * @index:GID table index to query 5241da177e4SLinus Torvalds * @gid:Returned GID 5251da177e4SLinus Torvalds * 5261da177e4SLinus Torvalds * ib_query_gid() fetches the specified GID table entry. 5271da177e4SLinus Torvalds */ 5281da177e4SLinus Torvalds int ib_query_gid(struct ib_device *device, 5291da177e4SLinus Torvalds u8 port_num, int index, union ib_gid *gid) 5301da177e4SLinus Torvalds { 5311da177e4SLinus Torvalds return device->query_gid(device, port_num, index, gid); 5321da177e4SLinus Torvalds } 5331da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_gid); 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds /** 5361da177e4SLinus Torvalds * ib_query_pkey - Get P_Key table entry 5371da177e4SLinus Torvalds * @device:Device to query 5381da177e4SLinus Torvalds * @port_num:Port number to query 5391da177e4SLinus Torvalds * @index:P_Key table index to query 5401da177e4SLinus Torvalds * @pkey:Returned P_Key 5411da177e4SLinus Torvalds * 5421da177e4SLinus Torvalds * ib_query_pkey() fetches the specified P_Key table entry. 5431da177e4SLinus Torvalds */ 5441da177e4SLinus Torvalds int ib_query_pkey(struct ib_device *device, 5451da177e4SLinus Torvalds u8 port_num, u16 index, u16 *pkey) 5461da177e4SLinus Torvalds { 5471da177e4SLinus Torvalds return device->query_pkey(device, port_num, index, pkey); 5481da177e4SLinus Torvalds } 5491da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_pkey); 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds /** 5521da177e4SLinus Torvalds * ib_modify_device - Change IB device attributes 5531da177e4SLinus Torvalds * @device:Device to modify 5541da177e4SLinus Torvalds * @device_modify_mask:Mask of attributes to change 5551da177e4SLinus Torvalds * @device_modify:New attribute values 5561da177e4SLinus Torvalds * 5571da177e4SLinus Torvalds * ib_modify_device() changes a device's attributes as specified by 5581da177e4SLinus Torvalds * the @device_modify_mask and @device_modify structure. 5591da177e4SLinus Torvalds */ 5601da177e4SLinus Torvalds int ib_modify_device(struct ib_device *device, 5611da177e4SLinus Torvalds int device_modify_mask, 5621da177e4SLinus Torvalds struct ib_device_modify *device_modify) 5631da177e4SLinus Torvalds { 5641da177e4SLinus Torvalds return device->modify_device(device, device_modify_mask, 5651da177e4SLinus Torvalds device_modify); 5661da177e4SLinus Torvalds } 5671da177e4SLinus Torvalds EXPORT_SYMBOL(ib_modify_device); 5681da177e4SLinus Torvalds 5691da177e4SLinus Torvalds /** 5701da177e4SLinus Torvalds * ib_modify_port - Modifies the attributes for the specified port. 5711da177e4SLinus Torvalds * @device: The device to modify. 5721da177e4SLinus Torvalds * @port_num: The number of the port to modify. 5731da177e4SLinus Torvalds * @port_modify_mask: Mask used to specify which attributes of the port 5741da177e4SLinus Torvalds * to change. 5751da177e4SLinus Torvalds * @port_modify: New attribute values for the port. 5761da177e4SLinus Torvalds * 5771da177e4SLinus Torvalds * ib_modify_port() changes a port's attributes as specified by the 5781da177e4SLinus Torvalds * @port_modify_mask and @port_modify structure. 5791da177e4SLinus Torvalds */ 5801da177e4SLinus Torvalds int ib_modify_port(struct ib_device *device, 5811da177e4SLinus Torvalds u8 port_num, int port_modify_mask, 5821da177e4SLinus Torvalds struct ib_port_modify *port_modify) 5831da177e4SLinus Torvalds { 58407ebafbaSTom Tucker if (device->node_type == RDMA_NODE_IB_SWITCH) { 585116c0074SRoland Dreier if (port_num) 586116c0074SRoland Dreier return -EINVAL; 587116c0074SRoland Dreier } else if (port_num < 1 || port_num > device->phys_port_cnt) 588116c0074SRoland Dreier return -EINVAL; 589116c0074SRoland Dreier 5901da177e4SLinus Torvalds return device->modify_port(device, port_num, port_modify_mask, 5911da177e4SLinus Torvalds port_modify); 5921da177e4SLinus Torvalds } 5931da177e4SLinus Torvalds EXPORT_SYMBOL(ib_modify_port); 5941da177e4SLinus Torvalds 5951da177e4SLinus Torvalds static int __init ib_core_init(void) 5961da177e4SLinus Torvalds { 5971da177e4SLinus Torvalds int ret; 5981da177e4SLinus Torvalds 5991da177e4SLinus Torvalds ret = ib_sysfs_setup(); 6001da177e4SLinus Torvalds if (ret) 6011da177e4SLinus Torvalds printk(KERN_WARNING "Couldn't create InfiniBand device class\n"); 6021da177e4SLinus Torvalds 6031da177e4SLinus Torvalds ret = ib_cache_setup(); 6041da177e4SLinus Torvalds if (ret) { 6051da177e4SLinus Torvalds printk(KERN_WARNING "Couldn't set up InfiniBand P_Key/GID cache\n"); 6061da177e4SLinus Torvalds ib_sysfs_cleanup(); 6071da177e4SLinus Torvalds } 6081da177e4SLinus Torvalds 6091da177e4SLinus Torvalds return ret; 6101da177e4SLinus Torvalds } 6111da177e4SLinus Torvalds 6121da177e4SLinus Torvalds static void __exit ib_core_cleanup(void) 6131da177e4SLinus Torvalds { 6141da177e4SLinus Torvalds ib_cache_cleanup(); 6151da177e4SLinus Torvalds ib_sysfs_cleanup(); 616*f7c6a7b5SRoland Dreier /* Make sure that any pending umem accounting work is done. */ 617*f7c6a7b5SRoland Dreier flush_scheduled_work(); 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds module_init(ib_core_init); 6211da177e4SLinus Torvalds module_exit(ib_core_cleanup); 622