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> 419268f72dSYotam Kenneth #include <linux/netdevice.h> 42b2cbae2cSRoland Dreier #include <rdma/rdma_netlink.h> 4303db3a2dSMatan Barak #include <rdma/ib_addr.h> 4403db3a2dSMatan Barak #include <rdma/ib_cache.h> 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds #include "core_priv.h" 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds MODULE_AUTHOR("Roland Dreier"); 491da177e4SLinus Torvalds MODULE_DESCRIPTION("core kernel InfiniBand API"); 501da177e4SLinus Torvalds MODULE_LICENSE("Dual BSD/GPL"); 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds struct ib_client_data { 531da177e4SLinus Torvalds struct list_head list; 541da177e4SLinus Torvalds struct ib_client *client; 551da177e4SLinus Torvalds void * data; 567c1eb45aSHaggai Eran /* The device or client is going down. Do not call client or device 577c1eb45aSHaggai Eran * callbacks other than remove(). */ 587c1eb45aSHaggai Eran bool going_down; 591da177e4SLinus Torvalds }; 601da177e4SLinus Torvalds 61*14d3a3b2SChristoph Hellwig struct workqueue_struct *ib_comp_wq; 62f0626710STejun Heo struct workqueue_struct *ib_wq; 63f0626710STejun Heo EXPORT_SYMBOL_GPL(ib_wq); 64f0626710STejun Heo 655aa44bb9SHaggai Eran /* The device_list and client_list contain devices and clients after their 665aa44bb9SHaggai Eran * registration has completed, and the devices and clients are removed 675aa44bb9SHaggai Eran * during unregistration. */ 681da177e4SLinus Torvalds static LIST_HEAD(device_list); 691da177e4SLinus Torvalds static LIST_HEAD(client_list); 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds /* 725aa44bb9SHaggai Eran * device_mutex and lists_rwsem protect access to both device_list and 735aa44bb9SHaggai Eran * client_list. device_mutex protects writer access by device and client 745aa44bb9SHaggai Eran * registration / de-registration. lists_rwsem protects reader access to 755aa44bb9SHaggai Eran * these lists. Iterators of these lists must lock it for read, while updates 765aa44bb9SHaggai Eran * to the lists must be done with a write lock. A special case is when the 775aa44bb9SHaggai Eran * device_mutex is locked. In this case locking the lists for read access is 785aa44bb9SHaggai Eran * not necessary as the device_mutex implies it. 797c1eb45aSHaggai Eran * 807c1eb45aSHaggai Eran * lists_rwsem also protects access to the client data list. 811da177e4SLinus Torvalds */ 8295ed644fSIngo Molnar static DEFINE_MUTEX(device_mutex); 835aa44bb9SHaggai Eran static DECLARE_RWSEM(lists_rwsem); 845aa44bb9SHaggai Eran 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds static int ib_device_check_mandatory(struct ib_device *device) 871da177e4SLinus Torvalds { 881da177e4SLinus Torvalds #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x } 891da177e4SLinus Torvalds static const struct { 901da177e4SLinus Torvalds size_t offset; 911da177e4SLinus Torvalds char *name; 921da177e4SLinus Torvalds } mandatory_table[] = { 931da177e4SLinus Torvalds IB_MANDATORY_FUNC(query_device), 941da177e4SLinus Torvalds IB_MANDATORY_FUNC(query_port), 951da177e4SLinus Torvalds IB_MANDATORY_FUNC(query_pkey), 961da177e4SLinus Torvalds IB_MANDATORY_FUNC(query_gid), 971da177e4SLinus Torvalds IB_MANDATORY_FUNC(alloc_pd), 981da177e4SLinus Torvalds IB_MANDATORY_FUNC(dealloc_pd), 991da177e4SLinus Torvalds IB_MANDATORY_FUNC(create_ah), 1001da177e4SLinus Torvalds IB_MANDATORY_FUNC(destroy_ah), 1011da177e4SLinus Torvalds IB_MANDATORY_FUNC(create_qp), 1021da177e4SLinus Torvalds IB_MANDATORY_FUNC(modify_qp), 1031da177e4SLinus Torvalds IB_MANDATORY_FUNC(destroy_qp), 1041da177e4SLinus Torvalds IB_MANDATORY_FUNC(post_send), 1051da177e4SLinus Torvalds IB_MANDATORY_FUNC(post_recv), 1061da177e4SLinus Torvalds IB_MANDATORY_FUNC(create_cq), 1071da177e4SLinus Torvalds IB_MANDATORY_FUNC(destroy_cq), 1081da177e4SLinus Torvalds IB_MANDATORY_FUNC(poll_cq), 1091da177e4SLinus Torvalds IB_MANDATORY_FUNC(req_notify_cq), 1101da177e4SLinus Torvalds IB_MANDATORY_FUNC(get_dma_mr), 1117738613eSIra Weiny IB_MANDATORY_FUNC(dereg_mr), 1127738613eSIra Weiny IB_MANDATORY_FUNC(get_port_immutable) 1131da177e4SLinus Torvalds }; 1141da177e4SLinus Torvalds int i; 1151da177e4SLinus Torvalds 1169a6b090cSAhmed S. Darwish for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) { 1171da177e4SLinus Torvalds if (!*(void **) ((void *) device + mandatory_table[i].offset)) { 1181da177e4SLinus Torvalds printk(KERN_WARNING "Device %s is missing mandatory function %s\n", 1191da177e4SLinus Torvalds device->name, mandatory_table[i].name); 1201da177e4SLinus Torvalds return -EINVAL; 1211da177e4SLinus Torvalds } 1221da177e4SLinus Torvalds } 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds return 0; 1251da177e4SLinus Torvalds } 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds static struct ib_device *__ib_device_get_by_name(const char *name) 1281da177e4SLinus Torvalds { 1291da177e4SLinus Torvalds struct ib_device *device; 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) 1321da177e4SLinus Torvalds if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX)) 1331da177e4SLinus Torvalds return device; 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds return NULL; 1361da177e4SLinus Torvalds } 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds static int alloc_name(char *name) 1401da177e4SLinus Torvalds { 14165d470b3SRoland Dreier unsigned long *inuse; 1421da177e4SLinus Torvalds char buf[IB_DEVICE_NAME_MAX]; 1431da177e4SLinus Torvalds struct ib_device *device; 1441da177e4SLinus Torvalds int i; 1451da177e4SLinus Torvalds 14665d470b3SRoland Dreier inuse = (unsigned long *) get_zeroed_page(GFP_KERNEL); 1471da177e4SLinus Torvalds if (!inuse) 1481da177e4SLinus Torvalds return -ENOMEM; 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) { 1511da177e4SLinus Torvalds if (!sscanf(device->name, name, &i)) 1521da177e4SLinus Torvalds continue; 1531da177e4SLinus Torvalds if (i < 0 || i >= PAGE_SIZE * 8) 1541da177e4SLinus Torvalds continue; 1551da177e4SLinus Torvalds snprintf(buf, sizeof buf, name, i); 1561da177e4SLinus Torvalds if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX)) 1571da177e4SLinus Torvalds set_bit(i, inuse); 1581da177e4SLinus Torvalds } 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds i = find_first_zero_bit(inuse, PAGE_SIZE * 8); 1611da177e4SLinus Torvalds free_page((unsigned long) inuse); 1621da177e4SLinus Torvalds snprintf(buf, sizeof buf, name, i); 1631da177e4SLinus Torvalds 1641da177e4SLinus Torvalds if (__ib_device_get_by_name(buf)) 1651da177e4SLinus Torvalds return -ENFILE; 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds strlcpy(name, buf, IB_DEVICE_NAME_MAX); 1681da177e4SLinus Torvalds return 0; 1691da177e4SLinus Torvalds } 1701da177e4SLinus Torvalds 17155aeed06SJason Gunthorpe static void ib_device_release(struct device *device) 17255aeed06SJason Gunthorpe { 17355aeed06SJason Gunthorpe struct ib_device *dev = container_of(device, struct ib_device, dev); 17455aeed06SJason Gunthorpe 17503db3a2dSMatan Barak ib_cache_release_one(dev); 17655aeed06SJason Gunthorpe kfree(dev->port_immutable); 17755aeed06SJason Gunthorpe kfree(dev); 17855aeed06SJason Gunthorpe } 17955aeed06SJason Gunthorpe 18055aeed06SJason Gunthorpe static int ib_device_uevent(struct device *device, 18155aeed06SJason Gunthorpe struct kobj_uevent_env *env) 18255aeed06SJason Gunthorpe { 18355aeed06SJason Gunthorpe struct ib_device *dev = container_of(device, struct ib_device, dev); 18455aeed06SJason Gunthorpe 18555aeed06SJason Gunthorpe if (add_uevent_var(env, "NAME=%s", dev->name)) 18655aeed06SJason Gunthorpe return -ENOMEM; 18755aeed06SJason Gunthorpe 18855aeed06SJason Gunthorpe /* 18955aeed06SJason Gunthorpe * It would be nice to pass the node GUID with the event... 19055aeed06SJason Gunthorpe */ 19155aeed06SJason Gunthorpe 19255aeed06SJason Gunthorpe return 0; 19355aeed06SJason Gunthorpe } 19455aeed06SJason Gunthorpe 19555aeed06SJason Gunthorpe static struct class ib_class = { 19655aeed06SJason Gunthorpe .name = "infiniband", 19755aeed06SJason Gunthorpe .dev_release = ib_device_release, 19855aeed06SJason Gunthorpe .dev_uevent = ib_device_uevent, 19955aeed06SJason Gunthorpe }; 20055aeed06SJason Gunthorpe 2011da177e4SLinus Torvalds /** 2021da177e4SLinus Torvalds * ib_alloc_device - allocate an IB device struct 2031da177e4SLinus Torvalds * @size:size of structure to allocate 2041da177e4SLinus Torvalds * 2051da177e4SLinus Torvalds * Low-level drivers should use ib_alloc_device() to allocate &struct 2061da177e4SLinus Torvalds * ib_device. @size is the size of the structure to be allocated, 2071da177e4SLinus Torvalds * including any private data used by the low-level driver. 2081da177e4SLinus Torvalds * ib_dealloc_device() must be used to free structures allocated with 2091da177e4SLinus Torvalds * ib_alloc_device(). 2101da177e4SLinus Torvalds */ 2111da177e4SLinus Torvalds struct ib_device *ib_alloc_device(size_t size) 2121da177e4SLinus Torvalds { 21355aeed06SJason Gunthorpe struct ib_device *device; 2141da177e4SLinus Torvalds 21555aeed06SJason Gunthorpe if (WARN_ON(size < sizeof(struct ib_device))) 21655aeed06SJason Gunthorpe return NULL; 21755aeed06SJason Gunthorpe 21855aeed06SJason Gunthorpe device = kzalloc(size, GFP_KERNEL); 21955aeed06SJason Gunthorpe if (!device) 22055aeed06SJason Gunthorpe return NULL; 22155aeed06SJason Gunthorpe 22255aeed06SJason Gunthorpe device->dev.class = &ib_class; 22355aeed06SJason Gunthorpe device_initialize(&device->dev); 22455aeed06SJason Gunthorpe 22555aeed06SJason Gunthorpe dev_set_drvdata(&device->dev, device); 22655aeed06SJason Gunthorpe 22755aeed06SJason Gunthorpe INIT_LIST_HEAD(&device->event_handler_list); 22855aeed06SJason Gunthorpe spin_lock_init(&device->event_handler_lock); 22955aeed06SJason Gunthorpe spin_lock_init(&device->client_data_lock); 23055aeed06SJason Gunthorpe INIT_LIST_HEAD(&device->client_data_list); 23155aeed06SJason Gunthorpe INIT_LIST_HEAD(&device->port_list); 23255aeed06SJason Gunthorpe 23355aeed06SJason Gunthorpe return device; 2341da177e4SLinus Torvalds } 2351da177e4SLinus Torvalds EXPORT_SYMBOL(ib_alloc_device); 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds /** 2381da177e4SLinus Torvalds * ib_dealloc_device - free an IB device struct 2391da177e4SLinus Torvalds * @device:structure to free 2401da177e4SLinus Torvalds * 2411da177e4SLinus Torvalds * Free a structure allocated with ib_alloc_device(). 2421da177e4SLinus Torvalds */ 2431da177e4SLinus Torvalds void ib_dealloc_device(struct ib_device *device) 2441da177e4SLinus Torvalds { 24555aeed06SJason Gunthorpe WARN_ON(device->reg_state != IB_DEV_UNREGISTERED && 24655aeed06SJason Gunthorpe device->reg_state != IB_DEV_UNINITIALIZED); 2479206dff1SRoland Dreier kobject_put(&device->dev.kobj); 2481da177e4SLinus Torvalds } 2491da177e4SLinus Torvalds EXPORT_SYMBOL(ib_dealloc_device); 2501da177e4SLinus Torvalds 2511da177e4SLinus Torvalds static int add_client_context(struct ib_device *device, struct ib_client *client) 2521da177e4SLinus Torvalds { 2531da177e4SLinus Torvalds struct ib_client_data *context; 2541da177e4SLinus Torvalds unsigned long flags; 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds context = kmalloc(sizeof *context, GFP_KERNEL); 2571da177e4SLinus Torvalds if (!context) { 2581da177e4SLinus Torvalds printk(KERN_WARNING "Couldn't allocate client context for %s/%s\n", 2591da177e4SLinus Torvalds device->name, client->name); 2601da177e4SLinus Torvalds return -ENOMEM; 2611da177e4SLinus Torvalds } 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds context->client = client; 2641da177e4SLinus Torvalds context->data = NULL; 2657c1eb45aSHaggai Eran context->going_down = false; 2661da177e4SLinus Torvalds 2677c1eb45aSHaggai Eran down_write(&lists_rwsem); 2681da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 2691da177e4SLinus Torvalds list_add(&context->list, &device->client_data_list); 2701da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 2717c1eb45aSHaggai Eran up_write(&lists_rwsem); 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds return 0; 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds 276337877a4SIra Weiny static int verify_immutable(const struct ib_device *dev, u8 port) 277337877a4SIra Weiny { 278337877a4SIra Weiny return WARN_ON(!rdma_cap_ib_mad(dev, port) && 279337877a4SIra Weiny rdma_max_mad_size(dev, port) != 0); 280337877a4SIra Weiny } 281337877a4SIra Weiny 2827738613eSIra Weiny static int read_port_immutable(struct ib_device *device) 2835eb620c8SYosef Etigin { 28455aeed06SJason Gunthorpe int ret; 2857738613eSIra Weiny u8 start_port = rdma_start_port(device); 2867738613eSIra Weiny u8 end_port = rdma_end_port(device); 2877738613eSIra Weiny u8 port; 2885eb620c8SYosef Etigin 2897738613eSIra Weiny /** 2907738613eSIra Weiny * device->port_immutable is indexed directly by the port number to make 2917738613eSIra Weiny * access to this data as efficient as possible. 2927738613eSIra Weiny * 2937738613eSIra Weiny * Therefore port_immutable is declared as a 1 based array with 2947738613eSIra Weiny * potential empty slots at the beginning. 2957738613eSIra Weiny */ 2967738613eSIra Weiny device->port_immutable = kzalloc(sizeof(*device->port_immutable) 2977738613eSIra Weiny * (end_port + 1), 2985eb620c8SYosef Etigin GFP_KERNEL); 2997738613eSIra Weiny if (!device->port_immutable) 30055aeed06SJason Gunthorpe return -ENOMEM; 3015eb620c8SYosef Etigin 3027738613eSIra Weiny for (port = start_port; port <= end_port; ++port) { 3037738613eSIra Weiny ret = device->get_port_immutable(device, port, 3047738613eSIra Weiny &device->port_immutable[port]); 3055eb620c8SYosef Etigin if (ret) 3065eb620c8SYosef Etigin return ret; 30755aeed06SJason Gunthorpe 30855aeed06SJason Gunthorpe if (verify_immutable(device, port)) 30955aeed06SJason Gunthorpe return -EINVAL; 31055aeed06SJason Gunthorpe } 31155aeed06SJason Gunthorpe return 0; 3125eb620c8SYosef Etigin } 3135eb620c8SYosef Etigin 3141da177e4SLinus Torvalds /** 3151da177e4SLinus Torvalds * ib_register_device - Register an IB device with IB core 3161da177e4SLinus Torvalds * @device:Device to register 3171da177e4SLinus Torvalds * 3181da177e4SLinus Torvalds * Low-level drivers use ib_register_device() to register their 3191da177e4SLinus Torvalds * devices with the IB core. All registered clients will receive a 3201da177e4SLinus Torvalds * callback for each device that is added. @device must be allocated 3211da177e4SLinus Torvalds * with ib_alloc_device(). 3221da177e4SLinus Torvalds */ 3239a6edb60SRalph Campbell int ib_register_device(struct ib_device *device, 3249a6edb60SRalph Campbell int (*port_callback)(struct ib_device *, 3259a6edb60SRalph Campbell u8, struct kobject *)) 3261da177e4SLinus Torvalds { 3271da177e4SLinus Torvalds int ret; 328b8071ad8SDoug Ledford struct ib_client *client; 3291da177e4SLinus Torvalds 33095ed644fSIngo Molnar mutex_lock(&device_mutex); 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds if (strchr(device->name, '%')) { 3331da177e4SLinus Torvalds ret = alloc_name(device->name); 3341da177e4SLinus Torvalds if (ret) 3351da177e4SLinus Torvalds goto out; 3361da177e4SLinus Torvalds } 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds if (ib_device_check_mandatory(device)) { 3391da177e4SLinus Torvalds ret = -EINVAL; 3401da177e4SLinus Torvalds goto out; 3411da177e4SLinus Torvalds } 3421da177e4SLinus Torvalds 3437738613eSIra Weiny ret = read_port_immutable(device); 3445eb620c8SYosef Etigin if (ret) { 3457738613eSIra Weiny printk(KERN_WARNING "Couldn't create per port immutable data %s\n", 3465eb620c8SYosef Etigin device->name); 3475eb620c8SYosef Etigin goto out; 3485eb620c8SYosef Etigin } 3495eb620c8SYosef Etigin 35003db3a2dSMatan Barak ret = ib_cache_setup_one(device); 35103db3a2dSMatan Barak if (ret) { 35203db3a2dSMatan Barak printk(KERN_WARNING "Couldn't set up InfiniBand P_Key/GID cache\n"); 35303db3a2dSMatan Barak goto out; 35403db3a2dSMatan Barak } 35503db3a2dSMatan Barak 3569a6edb60SRalph Campbell ret = ib_device_register_sysfs(device, port_callback); 3571da177e4SLinus Torvalds if (ret) { 3581da177e4SLinus Torvalds printk(KERN_WARNING "Couldn't register device %s with driver model\n", 3591da177e4SLinus Torvalds device->name); 36003db3a2dSMatan Barak ib_cache_cleanup_one(device); 3611da177e4SLinus Torvalds goto out; 3621da177e4SLinus Torvalds } 3631da177e4SLinus Torvalds 3641da177e4SLinus Torvalds device->reg_state = IB_DEV_REGISTERED; 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds list_for_each_entry(client, &client_list, list) 3671da177e4SLinus Torvalds if (client->add && !add_client_context(device, client)) 3681da177e4SLinus Torvalds client->add(device); 3691da177e4SLinus Torvalds 3705aa44bb9SHaggai Eran down_write(&lists_rwsem); 3715aa44bb9SHaggai Eran list_add_tail(&device->core_list, &device_list); 3725aa44bb9SHaggai Eran up_write(&lists_rwsem); 3731da177e4SLinus Torvalds out: 37495ed644fSIngo Molnar mutex_unlock(&device_mutex); 3751da177e4SLinus Torvalds return ret; 3761da177e4SLinus Torvalds } 3771da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_device); 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds /** 3801da177e4SLinus Torvalds * ib_unregister_device - Unregister an IB device 3811da177e4SLinus Torvalds * @device:Device to unregister 3821da177e4SLinus Torvalds * 3831da177e4SLinus Torvalds * Unregister an IB device. All clients will receive a remove callback. 3841da177e4SLinus Torvalds */ 3851da177e4SLinus Torvalds void ib_unregister_device(struct ib_device *device) 3861da177e4SLinus Torvalds { 3871da177e4SLinus Torvalds struct ib_client_data *context, *tmp; 3881da177e4SLinus Torvalds unsigned long flags; 3891da177e4SLinus Torvalds 39095ed644fSIngo Molnar mutex_lock(&device_mutex); 3911da177e4SLinus Torvalds 3925aa44bb9SHaggai Eran down_write(&lists_rwsem); 3935aa44bb9SHaggai Eran list_del(&device->core_list); 3947c1eb45aSHaggai Eran spin_lock_irqsave(&device->client_data_lock, flags); 3957c1eb45aSHaggai Eran list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 3967c1eb45aSHaggai Eran context->going_down = true; 3977c1eb45aSHaggai Eran spin_unlock_irqrestore(&device->client_data_lock, flags); 3987c1eb45aSHaggai Eran downgrade_write(&lists_rwsem); 3995aa44bb9SHaggai Eran 4007c1eb45aSHaggai Eran list_for_each_entry_safe(context, tmp, &device->client_data_list, 4017c1eb45aSHaggai Eran list) { 4027c1eb45aSHaggai Eran if (context->client->remove) 4037c1eb45aSHaggai Eran context->client->remove(device, context->data); 4047c1eb45aSHaggai Eran } 4057c1eb45aSHaggai Eran up_read(&lists_rwsem); 4061da177e4SLinus Torvalds 40795ed644fSIngo Molnar mutex_unlock(&device_mutex); 4081da177e4SLinus Torvalds 4099206dff1SRoland Dreier ib_device_unregister_sysfs(device); 41003db3a2dSMatan Barak ib_cache_cleanup_one(device); 4119206dff1SRoland Dreier 4127c1eb45aSHaggai Eran down_write(&lists_rwsem); 4131da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 4141da177e4SLinus Torvalds list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 4151da177e4SLinus Torvalds kfree(context); 4161da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 4177c1eb45aSHaggai Eran up_write(&lists_rwsem); 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds device->reg_state = IB_DEV_UNREGISTERED; 4201da177e4SLinus Torvalds } 4211da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_device); 4221da177e4SLinus Torvalds 4231da177e4SLinus Torvalds /** 4241da177e4SLinus Torvalds * ib_register_client - Register an IB client 4251da177e4SLinus Torvalds * @client:Client to register 4261da177e4SLinus Torvalds * 4271da177e4SLinus Torvalds * Upper level users of the IB drivers can use ib_register_client() to 4281da177e4SLinus Torvalds * register callbacks for IB device addition and removal. When an IB 4291da177e4SLinus Torvalds * device is added, each registered client's add method will be called 4301da177e4SLinus Torvalds * (in the order the clients were registered), and when a device is 4311da177e4SLinus Torvalds * removed, each client's remove method will be called (in the reverse 4321da177e4SLinus Torvalds * order that clients were registered). In addition, when 4331da177e4SLinus Torvalds * ib_register_client() is called, the client will receive an add 4341da177e4SLinus Torvalds * callback for all devices already registered. 4351da177e4SLinus Torvalds */ 4361da177e4SLinus Torvalds int ib_register_client(struct ib_client *client) 4371da177e4SLinus Torvalds { 4381da177e4SLinus Torvalds struct ib_device *device; 4391da177e4SLinus Torvalds 44095ed644fSIngo Molnar mutex_lock(&device_mutex); 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) 4431da177e4SLinus Torvalds if (client->add && !add_client_context(device, client)) 4441da177e4SLinus Torvalds client->add(device); 4451da177e4SLinus Torvalds 4465aa44bb9SHaggai Eran down_write(&lists_rwsem); 4475aa44bb9SHaggai Eran list_add_tail(&client->list, &client_list); 4485aa44bb9SHaggai Eran up_write(&lists_rwsem); 4495aa44bb9SHaggai Eran 45095ed644fSIngo Molnar mutex_unlock(&device_mutex); 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds return 0; 4531da177e4SLinus Torvalds } 4541da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_client); 4551da177e4SLinus Torvalds 4561da177e4SLinus Torvalds /** 4571da177e4SLinus Torvalds * ib_unregister_client - Unregister an IB client 4581da177e4SLinus Torvalds * @client:Client to unregister 4591da177e4SLinus Torvalds * 4601da177e4SLinus Torvalds * Upper level users use ib_unregister_client() to remove their client 4611da177e4SLinus Torvalds * registration. When ib_unregister_client() is called, the client 4621da177e4SLinus Torvalds * will receive a remove callback for each IB device still registered. 4631da177e4SLinus Torvalds */ 4641da177e4SLinus Torvalds void ib_unregister_client(struct ib_client *client) 4651da177e4SLinus Torvalds { 4661da177e4SLinus Torvalds struct ib_client_data *context, *tmp; 4671da177e4SLinus Torvalds struct ib_device *device; 4681da177e4SLinus Torvalds unsigned long flags; 4691da177e4SLinus Torvalds 47095ed644fSIngo Molnar mutex_lock(&device_mutex); 4711da177e4SLinus Torvalds 4725aa44bb9SHaggai Eran down_write(&lists_rwsem); 4735aa44bb9SHaggai Eran list_del(&client->list); 4745aa44bb9SHaggai Eran up_write(&lists_rwsem); 4755aa44bb9SHaggai Eran 4761da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) { 4777c1eb45aSHaggai Eran struct ib_client_data *found_context = NULL; 4781da177e4SLinus Torvalds 4797c1eb45aSHaggai Eran down_write(&lists_rwsem); 4801da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 4811da177e4SLinus Torvalds list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 4821da177e4SLinus Torvalds if (context->client == client) { 4837c1eb45aSHaggai Eran context->going_down = true; 4847c1eb45aSHaggai Eran found_context = context; 4857c1eb45aSHaggai Eran break; 4861da177e4SLinus Torvalds } 4871da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 4887c1eb45aSHaggai Eran up_write(&lists_rwsem); 4897c1eb45aSHaggai Eran 4907c1eb45aSHaggai Eran if (client->remove) 4917c1eb45aSHaggai Eran client->remove(device, found_context ? 4927c1eb45aSHaggai Eran found_context->data : NULL); 4937c1eb45aSHaggai Eran 4947c1eb45aSHaggai Eran if (!found_context) { 4957c1eb45aSHaggai Eran pr_warn("No client context found for %s/%s\n", 4967c1eb45aSHaggai Eran device->name, client->name); 4977c1eb45aSHaggai Eran continue; 4987c1eb45aSHaggai Eran } 4997c1eb45aSHaggai Eran 5007c1eb45aSHaggai Eran down_write(&lists_rwsem); 5017c1eb45aSHaggai Eran spin_lock_irqsave(&device->client_data_lock, flags); 5027c1eb45aSHaggai Eran list_del(&found_context->list); 5037c1eb45aSHaggai Eran kfree(found_context); 5047c1eb45aSHaggai Eran spin_unlock_irqrestore(&device->client_data_lock, flags); 5057c1eb45aSHaggai Eran up_write(&lists_rwsem); 5061da177e4SLinus Torvalds } 5071da177e4SLinus Torvalds 50895ed644fSIngo Molnar mutex_unlock(&device_mutex); 5091da177e4SLinus Torvalds } 5101da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_client); 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds /** 5131da177e4SLinus Torvalds * ib_get_client_data - Get IB client context 5141da177e4SLinus Torvalds * @device:Device to get context for 5151da177e4SLinus Torvalds * @client:Client to get context for 5161da177e4SLinus Torvalds * 5171da177e4SLinus Torvalds * ib_get_client_data() returns client context set with 5181da177e4SLinus Torvalds * ib_set_client_data(). 5191da177e4SLinus Torvalds */ 5201da177e4SLinus Torvalds void *ib_get_client_data(struct ib_device *device, struct ib_client *client) 5211da177e4SLinus Torvalds { 5221da177e4SLinus Torvalds struct ib_client_data *context; 5231da177e4SLinus Torvalds void *ret = NULL; 5241da177e4SLinus Torvalds unsigned long flags; 5251da177e4SLinus Torvalds 5261da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 5271da177e4SLinus Torvalds list_for_each_entry(context, &device->client_data_list, list) 5281da177e4SLinus Torvalds if (context->client == client) { 5291da177e4SLinus Torvalds ret = context->data; 5301da177e4SLinus Torvalds break; 5311da177e4SLinus Torvalds } 5321da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 5331da177e4SLinus Torvalds 5341da177e4SLinus Torvalds return ret; 5351da177e4SLinus Torvalds } 5361da177e4SLinus Torvalds EXPORT_SYMBOL(ib_get_client_data); 5371da177e4SLinus Torvalds 5381da177e4SLinus Torvalds /** 5399cd330d3SKrishna Kumar * ib_set_client_data - Set IB client context 5401da177e4SLinus Torvalds * @device:Device to set context for 5411da177e4SLinus Torvalds * @client:Client to set context for 5421da177e4SLinus Torvalds * @data:Context to set 5431da177e4SLinus Torvalds * 5441da177e4SLinus Torvalds * ib_set_client_data() sets client context that can be retrieved with 5451da177e4SLinus Torvalds * ib_get_client_data(). 5461da177e4SLinus Torvalds */ 5471da177e4SLinus Torvalds void ib_set_client_data(struct ib_device *device, struct ib_client *client, 5481da177e4SLinus Torvalds void *data) 5491da177e4SLinus Torvalds { 5501da177e4SLinus Torvalds struct ib_client_data *context; 5511da177e4SLinus Torvalds unsigned long flags; 5521da177e4SLinus Torvalds 5531da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 5541da177e4SLinus Torvalds list_for_each_entry(context, &device->client_data_list, list) 5551da177e4SLinus Torvalds if (context->client == client) { 5561da177e4SLinus Torvalds context->data = data; 5571da177e4SLinus Torvalds goto out; 5581da177e4SLinus Torvalds } 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds printk(KERN_WARNING "No client context found for %s/%s\n", 5611da177e4SLinus Torvalds device->name, client->name); 5621da177e4SLinus Torvalds 5631da177e4SLinus Torvalds out: 5641da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 5651da177e4SLinus Torvalds } 5661da177e4SLinus Torvalds EXPORT_SYMBOL(ib_set_client_data); 5671da177e4SLinus Torvalds 5681da177e4SLinus Torvalds /** 5691da177e4SLinus Torvalds * ib_register_event_handler - Register an IB event handler 5701da177e4SLinus Torvalds * @event_handler:Handler to register 5711da177e4SLinus Torvalds * 5721da177e4SLinus Torvalds * ib_register_event_handler() registers an event handler that will be 5731da177e4SLinus Torvalds * called back when asynchronous IB events occur (as defined in 5741da177e4SLinus Torvalds * chapter 11 of the InfiniBand Architecture Specification). This 5751da177e4SLinus Torvalds * callback may occur in interrupt context. 5761da177e4SLinus Torvalds */ 5771da177e4SLinus Torvalds int ib_register_event_handler (struct ib_event_handler *event_handler) 5781da177e4SLinus Torvalds { 5791da177e4SLinus Torvalds unsigned long flags; 5801da177e4SLinus Torvalds 5811da177e4SLinus Torvalds spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); 5821da177e4SLinus Torvalds list_add_tail(&event_handler->list, 5831da177e4SLinus Torvalds &event_handler->device->event_handler_list); 5841da177e4SLinus Torvalds spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds return 0; 5871da177e4SLinus Torvalds } 5881da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_event_handler); 5891da177e4SLinus Torvalds 5901da177e4SLinus Torvalds /** 5911da177e4SLinus Torvalds * ib_unregister_event_handler - Unregister an event handler 5921da177e4SLinus Torvalds * @event_handler:Handler to unregister 5931da177e4SLinus Torvalds * 5941da177e4SLinus Torvalds * Unregister an event handler registered with 5951da177e4SLinus Torvalds * ib_register_event_handler(). 5961da177e4SLinus Torvalds */ 5971da177e4SLinus Torvalds int ib_unregister_event_handler(struct ib_event_handler *event_handler) 5981da177e4SLinus Torvalds { 5991da177e4SLinus Torvalds unsigned long flags; 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); 6021da177e4SLinus Torvalds list_del(&event_handler->list); 6031da177e4SLinus Torvalds spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); 6041da177e4SLinus Torvalds 6051da177e4SLinus Torvalds return 0; 6061da177e4SLinus Torvalds } 6071da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_event_handler); 6081da177e4SLinus Torvalds 6091da177e4SLinus Torvalds /** 6101da177e4SLinus Torvalds * ib_dispatch_event - Dispatch an asynchronous event 6111da177e4SLinus Torvalds * @event:Event to dispatch 6121da177e4SLinus Torvalds * 6131da177e4SLinus Torvalds * Low-level drivers must call ib_dispatch_event() to dispatch the 6141da177e4SLinus Torvalds * event to all registered event handlers when an asynchronous event 6151da177e4SLinus Torvalds * occurs. 6161da177e4SLinus Torvalds */ 6171da177e4SLinus Torvalds void ib_dispatch_event(struct ib_event *event) 6181da177e4SLinus Torvalds { 6191da177e4SLinus Torvalds unsigned long flags; 6201da177e4SLinus Torvalds struct ib_event_handler *handler; 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds spin_lock_irqsave(&event->device->event_handler_lock, flags); 6231da177e4SLinus Torvalds 6241da177e4SLinus Torvalds list_for_each_entry(handler, &event->device->event_handler_list, list) 6251da177e4SLinus Torvalds handler->handler(handler, event); 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds spin_unlock_irqrestore(&event->device->event_handler_lock, flags); 6281da177e4SLinus Torvalds } 6291da177e4SLinus Torvalds EXPORT_SYMBOL(ib_dispatch_event); 6301da177e4SLinus Torvalds 6311da177e4SLinus Torvalds /** 6321da177e4SLinus Torvalds * ib_query_device - Query IB device attributes 6331da177e4SLinus Torvalds * @device:Device to query 6341da177e4SLinus Torvalds * @device_attr:Device attributes 6351da177e4SLinus Torvalds * 6361da177e4SLinus Torvalds * ib_query_device() returns the attributes of a device through the 6371da177e4SLinus Torvalds * @device_attr pointer. 6381da177e4SLinus Torvalds */ 6391da177e4SLinus Torvalds int ib_query_device(struct ib_device *device, 6401da177e4SLinus Torvalds struct ib_device_attr *device_attr) 6411da177e4SLinus Torvalds { 6422528e33eSMatan Barak struct ib_udata uhw = {.outlen = 0, .inlen = 0}; 6432528e33eSMatan Barak 64424306dc6SMatan Barak memset(device_attr, 0, sizeof(*device_attr)); 64524306dc6SMatan Barak 6462528e33eSMatan Barak return device->query_device(device, device_attr, &uhw); 6471da177e4SLinus Torvalds } 6481da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_device); 6491da177e4SLinus Torvalds 6501da177e4SLinus Torvalds /** 6511da177e4SLinus Torvalds * ib_query_port - Query IB port attributes 6521da177e4SLinus Torvalds * @device:Device to query 6531da177e4SLinus Torvalds * @port_num:Port number to query 6541da177e4SLinus Torvalds * @port_attr:Port attributes 6551da177e4SLinus Torvalds * 6561da177e4SLinus Torvalds * ib_query_port() returns the attributes of a port through the 6571da177e4SLinus Torvalds * @port_attr pointer. 6581da177e4SLinus Torvalds */ 6591da177e4SLinus Torvalds int ib_query_port(struct ib_device *device, 6601da177e4SLinus Torvalds u8 port_num, 6611da177e4SLinus Torvalds struct ib_port_attr *port_attr) 6621da177e4SLinus Torvalds { 6630cf18d77SIra Weiny if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) 664116c0074SRoland Dreier return -EINVAL; 665116c0074SRoland Dreier 6661da177e4SLinus Torvalds return device->query_port(device, port_num, port_attr); 6671da177e4SLinus Torvalds } 6681da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_port); 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds /** 6711da177e4SLinus Torvalds * ib_query_gid - Get GID table entry 6721da177e4SLinus Torvalds * @device:Device to query 6731da177e4SLinus Torvalds * @port_num:Port number to query 6741da177e4SLinus Torvalds * @index:GID table index to query 6751da177e4SLinus Torvalds * @gid:Returned GID 67655ee3ab2SMatan Barak * @attr: Returned GID attributes related to this GID index (only in RoCE). 67755ee3ab2SMatan Barak * NULL means ignore. 6781da177e4SLinus Torvalds * 6791da177e4SLinus Torvalds * ib_query_gid() fetches the specified GID table entry. 6801da177e4SLinus Torvalds */ 6811da177e4SLinus Torvalds int ib_query_gid(struct ib_device *device, 68255ee3ab2SMatan Barak u8 port_num, int index, union ib_gid *gid, 68355ee3ab2SMatan Barak struct ib_gid_attr *attr) 6841da177e4SLinus Torvalds { 68503db3a2dSMatan Barak if (rdma_cap_roce_gid_table(device, port_num)) 68655ee3ab2SMatan Barak return ib_get_cached_gid(device, port_num, index, gid, attr); 68755ee3ab2SMatan Barak 68855ee3ab2SMatan Barak if (attr) 68955ee3ab2SMatan Barak return -EINVAL; 69003db3a2dSMatan Barak 6911da177e4SLinus Torvalds return device->query_gid(device, port_num, index, gid); 6921da177e4SLinus Torvalds } 6931da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_gid); 6941da177e4SLinus Torvalds 6951da177e4SLinus Torvalds /** 69603db3a2dSMatan Barak * ib_enum_roce_netdev - enumerate all RoCE ports 69703db3a2dSMatan Barak * @ib_dev : IB device we want to query 69803db3a2dSMatan Barak * @filter: Should we call the callback? 69903db3a2dSMatan Barak * @filter_cookie: Cookie passed to filter 70003db3a2dSMatan Barak * @cb: Callback to call for each found RoCE ports 70103db3a2dSMatan Barak * @cookie: Cookie passed back to the callback 70203db3a2dSMatan Barak * 70303db3a2dSMatan Barak * Enumerates all of the physical RoCE ports of ib_dev 70403db3a2dSMatan Barak * which are related to netdevice and calls callback() on each 70503db3a2dSMatan Barak * device for which filter() function returns non zero. 70603db3a2dSMatan Barak */ 70703db3a2dSMatan Barak void ib_enum_roce_netdev(struct ib_device *ib_dev, 70803db3a2dSMatan Barak roce_netdev_filter filter, 70903db3a2dSMatan Barak void *filter_cookie, 71003db3a2dSMatan Barak roce_netdev_callback cb, 71103db3a2dSMatan Barak void *cookie) 71203db3a2dSMatan Barak { 71303db3a2dSMatan Barak u8 port; 71403db3a2dSMatan Barak 71503db3a2dSMatan Barak for (port = rdma_start_port(ib_dev); port <= rdma_end_port(ib_dev); 71603db3a2dSMatan Barak port++) 71703db3a2dSMatan Barak if (rdma_protocol_roce(ib_dev, port)) { 71803db3a2dSMatan Barak struct net_device *idev = NULL; 71903db3a2dSMatan Barak 72003db3a2dSMatan Barak if (ib_dev->get_netdev) 72103db3a2dSMatan Barak idev = ib_dev->get_netdev(ib_dev, port); 72203db3a2dSMatan Barak 72303db3a2dSMatan Barak if (idev && 72403db3a2dSMatan Barak idev->reg_state >= NETREG_UNREGISTERED) { 72503db3a2dSMatan Barak dev_put(idev); 72603db3a2dSMatan Barak idev = NULL; 72703db3a2dSMatan Barak } 72803db3a2dSMatan Barak 72903db3a2dSMatan Barak if (filter(ib_dev, port, idev, filter_cookie)) 73003db3a2dSMatan Barak cb(ib_dev, port, idev, cookie); 73103db3a2dSMatan Barak 73203db3a2dSMatan Barak if (idev) 73303db3a2dSMatan Barak dev_put(idev); 73403db3a2dSMatan Barak } 73503db3a2dSMatan Barak } 73603db3a2dSMatan Barak 73703db3a2dSMatan Barak /** 73803db3a2dSMatan Barak * ib_enum_all_roce_netdevs - enumerate all RoCE devices 73903db3a2dSMatan Barak * @filter: Should we call the callback? 74003db3a2dSMatan Barak * @filter_cookie: Cookie passed to filter 74103db3a2dSMatan Barak * @cb: Callback to call for each found RoCE ports 74203db3a2dSMatan Barak * @cookie: Cookie passed back to the callback 74303db3a2dSMatan Barak * 74403db3a2dSMatan Barak * Enumerates all RoCE devices' physical ports which are related 74503db3a2dSMatan Barak * to netdevices and calls callback() on each device for which 74603db3a2dSMatan Barak * filter() function returns non zero. 74703db3a2dSMatan Barak */ 74803db3a2dSMatan Barak void ib_enum_all_roce_netdevs(roce_netdev_filter filter, 74903db3a2dSMatan Barak void *filter_cookie, 75003db3a2dSMatan Barak roce_netdev_callback cb, 75103db3a2dSMatan Barak void *cookie) 75203db3a2dSMatan Barak { 75303db3a2dSMatan Barak struct ib_device *dev; 75403db3a2dSMatan Barak 75503db3a2dSMatan Barak down_read(&lists_rwsem); 75603db3a2dSMatan Barak list_for_each_entry(dev, &device_list, core_list) 75703db3a2dSMatan Barak ib_enum_roce_netdev(dev, filter, filter_cookie, cb, cookie); 75803db3a2dSMatan Barak up_read(&lists_rwsem); 75903db3a2dSMatan Barak } 76003db3a2dSMatan Barak 76103db3a2dSMatan Barak /** 7621da177e4SLinus Torvalds * ib_query_pkey - Get P_Key table entry 7631da177e4SLinus Torvalds * @device:Device to query 7641da177e4SLinus Torvalds * @port_num:Port number to query 7651da177e4SLinus Torvalds * @index:P_Key table index to query 7661da177e4SLinus Torvalds * @pkey:Returned P_Key 7671da177e4SLinus Torvalds * 7681da177e4SLinus Torvalds * ib_query_pkey() fetches the specified P_Key table entry. 7691da177e4SLinus Torvalds */ 7701da177e4SLinus Torvalds int ib_query_pkey(struct ib_device *device, 7711da177e4SLinus Torvalds u8 port_num, u16 index, u16 *pkey) 7721da177e4SLinus Torvalds { 7731da177e4SLinus Torvalds return device->query_pkey(device, port_num, index, pkey); 7741da177e4SLinus Torvalds } 7751da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_pkey); 7761da177e4SLinus Torvalds 7771da177e4SLinus Torvalds /** 7781da177e4SLinus Torvalds * ib_modify_device - Change IB device attributes 7791da177e4SLinus Torvalds * @device:Device to modify 7801da177e4SLinus Torvalds * @device_modify_mask:Mask of attributes to change 7811da177e4SLinus Torvalds * @device_modify:New attribute values 7821da177e4SLinus Torvalds * 7831da177e4SLinus Torvalds * ib_modify_device() changes a device's attributes as specified by 7841da177e4SLinus Torvalds * the @device_modify_mask and @device_modify structure. 7851da177e4SLinus Torvalds */ 7861da177e4SLinus Torvalds int ib_modify_device(struct ib_device *device, 7871da177e4SLinus Torvalds int device_modify_mask, 7881da177e4SLinus Torvalds struct ib_device_modify *device_modify) 7891da177e4SLinus Torvalds { 79010e1b54bSBart Van Assche if (!device->modify_device) 79110e1b54bSBart Van Assche return -ENOSYS; 79210e1b54bSBart Van Assche 7931da177e4SLinus Torvalds return device->modify_device(device, device_modify_mask, 7941da177e4SLinus Torvalds device_modify); 7951da177e4SLinus Torvalds } 7961da177e4SLinus Torvalds EXPORT_SYMBOL(ib_modify_device); 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvalds /** 7991da177e4SLinus Torvalds * ib_modify_port - Modifies the attributes for the specified port. 8001da177e4SLinus Torvalds * @device: The device to modify. 8011da177e4SLinus Torvalds * @port_num: The number of the port to modify. 8021da177e4SLinus Torvalds * @port_modify_mask: Mask used to specify which attributes of the port 8031da177e4SLinus Torvalds * to change. 8041da177e4SLinus Torvalds * @port_modify: New attribute values for the port. 8051da177e4SLinus Torvalds * 8061da177e4SLinus Torvalds * ib_modify_port() changes a port's attributes as specified by the 8071da177e4SLinus Torvalds * @port_modify_mask and @port_modify structure. 8081da177e4SLinus Torvalds */ 8091da177e4SLinus Torvalds int ib_modify_port(struct ib_device *device, 8101da177e4SLinus Torvalds u8 port_num, int port_modify_mask, 8111da177e4SLinus Torvalds struct ib_port_modify *port_modify) 8121da177e4SLinus Torvalds { 81310e1b54bSBart Van Assche if (!device->modify_port) 81410e1b54bSBart Van Assche return -ENOSYS; 81510e1b54bSBart Van Assche 8160cf18d77SIra Weiny if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) 817116c0074SRoland Dreier return -EINVAL; 818116c0074SRoland Dreier 8191da177e4SLinus Torvalds return device->modify_port(device, port_num, port_modify_mask, 8201da177e4SLinus Torvalds port_modify); 8211da177e4SLinus Torvalds } 8221da177e4SLinus Torvalds EXPORT_SYMBOL(ib_modify_port); 8231da177e4SLinus Torvalds 8245eb620c8SYosef Etigin /** 8255eb620c8SYosef Etigin * ib_find_gid - Returns the port number and GID table index where 8265eb620c8SYosef Etigin * a specified GID value occurs. 8275eb620c8SYosef Etigin * @device: The device to query. 8285eb620c8SYosef Etigin * @gid: The GID value to search for. 82955ee3ab2SMatan Barak * @ndev: The ndev related to the GID to search for. 8305eb620c8SYosef Etigin * @port_num: The port number of the device where the GID value was found. 8315eb620c8SYosef Etigin * @index: The index into the GID table where the GID was found. This 8325eb620c8SYosef Etigin * parameter may be NULL. 8335eb620c8SYosef Etigin */ 8345eb620c8SYosef Etigin int ib_find_gid(struct ib_device *device, union ib_gid *gid, 83555ee3ab2SMatan Barak struct net_device *ndev, u8 *port_num, u16 *index) 8365eb620c8SYosef Etigin { 8375eb620c8SYosef Etigin union ib_gid tmp_gid; 8385eb620c8SYosef Etigin int ret, port, i; 8395eb620c8SYosef Etigin 8400cf18d77SIra Weiny for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) { 84103db3a2dSMatan Barak if (rdma_cap_roce_gid_table(device, port)) { 842d300ec52SMatan Barak if (!ib_find_cached_gid_by_port(device, gid, port, 84355ee3ab2SMatan Barak ndev, index)) { 84403db3a2dSMatan Barak *port_num = port; 84503db3a2dSMatan Barak return 0; 84603db3a2dSMatan Barak } 84798d25afaSDan Carpenter } 84803db3a2dSMatan Barak 8497738613eSIra Weiny for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) { 85055ee3ab2SMatan Barak ret = ib_query_gid(device, port, i, &tmp_gid, NULL); 8515eb620c8SYosef Etigin if (ret) 8525eb620c8SYosef Etigin return ret; 8535eb620c8SYosef Etigin if (!memcmp(&tmp_gid, gid, sizeof *gid)) { 8545eb620c8SYosef Etigin *port_num = port; 8555eb620c8SYosef Etigin if (index) 8565eb620c8SYosef Etigin *index = i; 8575eb620c8SYosef Etigin return 0; 8585eb620c8SYosef Etigin } 8595eb620c8SYosef Etigin } 8605eb620c8SYosef Etigin } 8615eb620c8SYosef Etigin 8625eb620c8SYosef Etigin return -ENOENT; 8635eb620c8SYosef Etigin } 8645eb620c8SYosef Etigin EXPORT_SYMBOL(ib_find_gid); 8655eb620c8SYosef Etigin 8665eb620c8SYosef Etigin /** 8675eb620c8SYosef Etigin * ib_find_pkey - Returns the PKey table index where a specified 8685eb620c8SYosef Etigin * PKey value occurs. 8695eb620c8SYosef Etigin * @device: The device to query. 8705eb620c8SYosef Etigin * @port_num: The port number of the device to search for the PKey. 8715eb620c8SYosef Etigin * @pkey: The PKey value to search for. 8725eb620c8SYosef Etigin * @index: The index into the PKey table where the PKey was found. 8735eb620c8SYosef Etigin */ 8745eb620c8SYosef Etigin int ib_find_pkey(struct ib_device *device, 8755eb620c8SYosef Etigin u8 port_num, u16 pkey, u16 *index) 8765eb620c8SYosef Etigin { 8775eb620c8SYosef Etigin int ret, i; 8785eb620c8SYosef Etigin u16 tmp_pkey; 879ff7166c4SJack Morgenstein int partial_ix = -1; 8805eb620c8SYosef Etigin 8817738613eSIra Weiny for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) { 8825eb620c8SYosef Etigin ret = ib_query_pkey(device, port_num, i, &tmp_pkey); 8835eb620c8SYosef Etigin if (ret) 8845eb620c8SYosef Etigin return ret; 88536026eccSMoni Shoua if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) { 886ff7166c4SJack Morgenstein /* if there is full-member pkey take it.*/ 887ff7166c4SJack Morgenstein if (tmp_pkey & 0x8000) { 8885eb620c8SYosef Etigin *index = i; 8895eb620c8SYosef Etigin return 0; 8905eb620c8SYosef Etigin } 891ff7166c4SJack Morgenstein if (partial_ix < 0) 892ff7166c4SJack Morgenstein partial_ix = i; 893ff7166c4SJack Morgenstein } 8945eb620c8SYosef Etigin } 8955eb620c8SYosef Etigin 896ff7166c4SJack Morgenstein /*no full-member, if exists take the limited*/ 897ff7166c4SJack Morgenstein if (partial_ix >= 0) { 898ff7166c4SJack Morgenstein *index = partial_ix; 899ff7166c4SJack Morgenstein return 0; 900ff7166c4SJack Morgenstein } 9015eb620c8SYosef Etigin return -ENOENT; 9025eb620c8SYosef Etigin } 9035eb620c8SYosef Etigin EXPORT_SYMBOL(ib_find_pkey); 9045eb620c8SYosef Etigin 9059268f72dSYotam Kenneth /** 9069268f72dSYotam Kenneth * ib_get_net_dev_by_params() - Return the appropriate net_dev 9079268f72dSYotam Kenneth * for a received CM request 9089268f72dSYotam Kenneth * @dev: An RDMA device on which the request has been received. 9099268f72dSYotam Kenneth * @port: Port number on the RDMA device. 9109268f72dSYotam Kenneth * @pkey: The Pkey the request came on. 9119268f72dSYotam Kenneth * @gid: A GID that the net_dev uses to communicate. 9129268f72dSYotam Kenneth * @addr: Contains the IP address that the request specified as its 9139268f72dSYotam Kenneth * destination. 9149268f72dSYotam Kenneth */ 9159268f72dSYotam Kenneth struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, 9169268f72dSYotam Kenneth u8 port, 9179268f72dSYotam Kenneth u16 pkey, 9189268f72dSYotam Kenneth const union ib_gid *gid, 9199268f72dSYotam Kenneth const struct sockaddr *addr) 9209268f72dSYotam Kenneth { 9219268f72dSYotam Kenneth struct net_device *net_dev = NULL; 9229268f72dSYotam Kenneth struct ib_client_data *context; 9239268f72dSYotam Kenneth 9249268f72dSYotam Kenneth if (!rdma_protocol_ib(dev, port)) 9259268f72dSYotam Kenneth return NULL; 9269268f72dSYotam Kenneth 9279268f72dSYotam Kenneth down_read(&lists_rwsem); 9289268f72dSYotam Kenneth 9299268f72dSYotam Kenneth list_for_each_entry(context, &dev->client_data_list, list) { 9309268f72dSYotam Kenneth struct ib_client *client = context->client; 9319268f72dSYotam Kenneth 9329268f72dSYotam Kenneth if (context->going_down) 9339268f72dSYotam Kenneth continue; 9349268f72dSYotam Kenneth 9359268f72dSYotam Kenneth if (client->get_net_dev_by_params) { 9369268f72dSYotam Kenneth net_dev = client->get_net_dev_by_params(dev, port, pkey, 9379268f72dSYotam Kenneth gid, addr, 9389268f72dSYotam Kenneth context->data); 9399268f72dSYotam Kenneth if (net_dev) 9409268f72dSYotam Kenneth break; 9419268f72dSYotam Kenneth } 9429268f72dSYotam Kenneth } 9439268f72dSYotam Kenneth 9449268f72dSYotam Kenneth up_read(&lists_rwsem); 9459268f72dSYotam Kenneth 9469268f72dSYotam Kenneth return net_dev; 9479268f72dSYotam Kenneth } 9489268f72dSYotam Kenneth EXPORT_SYMBOL(ib_get_net_dev_by_params); 9499268f72dSYotam Kenneth 9501da177e4SLinus Torvalds static int __init ib_core_init(void) 9511da177e4SLinus Torvalds { 9521da177e4SLinus Torvalds int ret; 9531da177e4SLinus Torvalds 954f0626710STejun Heo ib_wq = alloc_workqueue("infiniband", 0, 0); 955f0626710STejun Heo if (!ib_wq) 956f0626710STejun Heo return -ENOMEM; 957f0626710STejun Heo 958*14d3a3b2SChristoph Hellwig ib_comp_wq = alloc_workqueue("ib-comp-wq", 959*14d3a3b2SChristoph Hellwig WQ_UNBOUND | WQ_HIGHPRI | WQ_MEM_RECLAIM, 960*14d3a3b2SChristoph Hellwig WQ_UNBOUND_MAX_ACTIVE); 961*14d3a3b2SChristoph Hellwig if (!ib_comp_wq) { 962*14d3a3b2SChristoph Hellwig ret = -ENOMEM; 963*14d3a3b2SChristoph Hellwig goto err; 964*14d3a3b2SChristoph Hellwig } 965*14d3a3b2SChristoph Hellwig 96655aeed06SJason Gunthorpe ret = class_register(&ib_class); 967fd75c789SNir Muchtar if (ret) { 9681da177e4SLinus Torvalds printk(KERN_WARNING "Couldn't create InfiniBand device class\n"); 969*14d3a3b2SChristoph Hellwig goto err_comp; 970fd75c789SNir Muchtar } 9711da177e4SLinus Torvalds 972b2cbae2cSRoland Dreier ret = ibnl_init(); 9731da177e4SLinus Torvalds if (ret) { 974b2cbae2cSRoland Dreier printk(KERN_WARNING "Couldn't init IB netlink interface\n"); 975fd75c789SNir Muchtar goto err_sysfs; 9761da177e4SLinus Torvalds } 9771da177e4SLinus Torvalds 97803db3a2dSMatan Barak ib_cache_setup(); 979b2cbae2cSRoland Dreier 980fd75c789SNir Muchtar return 0; 981fd75c789SNir Muchtar 982fd75c789SNir Muchtar err_sysfs: 98355aeed06SJason Gunthorpe class_unregister(&ib_class); 984*14d3a3b2SChristoph Hellwig err_comp: 985*14d3a3b2SChristoph Hellwig destroy_workqueue(ib_comp_wq); 986fd75c789SNir Muchtar err: 987fd75c789SNir Muchtar destroy_workqueue(ib_wq); 9881da177e4SLinus Torvalds return ret; 9891da177e4SLinus Torvalds } 9901da177e4SLinus Torvalds 9911da177e4SLinus Torvalds static void __exit ib_core_cleanup(void) 9921da177e4SLinus Torvalds { 9931da177e4SLinus Torvalds ib_cache_cleanup(); 994b2cbae2cSRoland Dreier ibnl_cleanup(); 99555aeed06SJason Gunthorpe class_unregister(&ib_class); 996*14d3a3b2SChristoph Hellwig destroy_workqueue(ib_comp_wq); 997f7c6a7b5SRoland Dreier /* Make sure that any pending umem accounting work is done. */ 998f0626710STejun Heo destroy_workqueue(ib_wq); 9991da177e4SLinus Torvalds } 10001da177e4SLinus Torvalds 10011da177e4SLinus Torvalds module_init(ib_core_init); 10021da177e4SLinus Torvalds module_exit(ib_core_cleanup); 1003