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 6114d3a3b2SChristoph 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)) { 118aba25a3eSParav Pandit pr_warn("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); 257a0b3455fSLeon Romanovsky if (!context) 2581da177e4SLinus Torvalds return -ENOMEM; 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds context->client = client; 2611da177e4SLinus Torvalds context->data = NULL; 2627c1eb45aSHaggai Eran context->going_down = false; 2631da177e4SLinus Torvalds 2647c1eb45aSHaggai Eran down_write(&lists_rwsem); 2651da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 2661da177e4SLinus Torvalds list_add(&context->list, &device->client_data_list); 2671da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 2687c1eb45aSHaggai Eran up_write(&lists_rwsem); 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds return 0; 2711da177e4SLinus Torvalds } 2721da177e4SLinus Torvalds 273337877a4SIra Weiny static int verify_immutable(const struct ib_device *dev, u8 port) 274337877a4SIra Weiny { 275337877a4SIra Weiny return WARN_ON(!rdma_cap_ib_mad(dev, port) && 276337877a4SIra Weiny rdma_max_mad_size(dev, port) != 0); 277337877a4SIra Weiny } 278337877a4SIra Weiny 2797738613eSIra Weiny static int read_port_immutable(struct ib_device *device) 2805eb620c8SYosef Etigin { 28155aeed06SJason Gunthorpe int ret; 2827738613eSIra Weiny u8 start_port = rdma_start_port(device); 2837738613eSIra Weiny u8 end_port = rdma_end_port(device); 2847738613eSIra Weiny u8 port; 2855eb620c8SYosef Etigin 2867738613eSIra Weiny /** 2877738613eSIra Weiny * device->port_immutable is indexed directly by the port number to make 2887738613eSIra Weiny * access to this data as efficient as possible. 2897738613eSIra Weiny * 2907738613eSIra Weiny * Therefore port_immutable is declared as a 1 based array with 2917738613eSIra Weiny * potential empty slots at the beginning. 2927738613eSIra Weiny */ 2937738613eSIra Weiny device->port_immutable = kzalloc(sizeof(*device->port_immutable) 2947738613eSIra Weiny * (end_port + 1), 2955eb620c8SYosef Etigin GFP_KERNEL); 2967738613eSIra Weiny if (!device->port_immutable) 29755aeed06SJason Gunthorpe return -ENOMEM; 2985eb620c8SYosef Etigin 2997738613eSIra Weiny for (port = start_port; port <= end_port; ++port) { 3007738613eSIra Weiny ret = device->get_port_immutable(device, port, 3017738613eSIra Weiny &device->port_immutable[port]); 3025eb620c8SYosef Etigin if (ret) 3035eb620c8SYosef Etigin return ret; 30455aeed06SJason Gunthorpe 30555aeed06SJason Gunthorpe if (verify_immutable(device, port)) 30655aeed06SJason Gunthorpe return -EINVAL; 30755aeed06SJason Gunthorpe } 30855aeed06SJason Gunthorpe return 0; 3095eb620c8SYosef Etigin } 3105eb620c8SYosef Etigin 3115fa76c20SIra Weiny void ib_get_device_fw_str(struct ib_device *dev, char *str, size_t str_len) 3125fa76c20SIra Weiny { 3135fa76c20SIra Weiny if (dev->get_dev_fw_str) 3145fa76c20SIra Weiny dev->get_dev_fw_str(dev, str, str_len); 3155fa76c20SIra Weiny else 3165fa76c20SIra Weiny str[0] = '\0'; 3175fa76c20SIra Weiny } 3185fa76c20SIra Weiny EXPORT_SYMBOL(ib_get_device_fw_str); 3195fa76c20SIra Weiny 3201da177e4SLinus Torvalds /** 3211da177e4SLinus Torvalds * ib_register_device - Register an IB device with IB core 3221da177e4SLinus Torvalds * @device:Device to register 3231da177e4SLinus Torvalds * 3241da177e4SLinus Torvalds * Low-level drivers use ib_register_device() to register their 3251da177e4SLinus Torvalds * devices with the IB core. All registered clients will receive a 3261da177e4SLinus Torvalds * callback for each device that is added. @device must be allocated 3271da177e4SLinus Torvalds * with ib_alloc_device(). 3281da177e4SLinus Torvalds */ 3299a6edb60SRalph Campbell int ib_register_device(struct ib_device *device, 3309a6edb60SRalph Campbell int (*port_callback)(struct ib_device *, 3319a6edb60SRalph Campbell u8, struct kobject *)) 3321da177e4SLinus Torvalds { 3331da177e4SLinus Torvalds int ret; 334b8071ad8SDoug Ledford struct ib_client *client; 3353e153a93SIra Weiny struct ib_udata uhw = {.outlen = 0, .inlen = 0}; 3361da177e4SLinus Torvalds 33795ed644fSIngo Molnar mutex_lock(&device_mutex); 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds if (strchr(device->name, '%')) { 3401da177e4SLinus Torvalds ret = alloc_name(device->name); 3411da177e4SLinus Torvalds if (ret) 3421da177e4SLinus Torvalds goto out; 3431da177e4SLinus Torvalds } 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds if (ib_device_check_mandatory(device)) { 3461da177e4SLinus Torvalds ret = -EINVAL; 3471da177e4SLinus Torvalds goto out; 3481da177e4SLinus Torvalds } 3491da177e4SLinus Torvalds 3507738613eSIra Weiny ret = read_port_immutable(device); 3515eb620c8SYosef Etigin if (ret) { 352aba25a3eSParav Pandit pr_warn("Couldn't create per port immutable data %s\n", 3535eb620c8SYosef Etigin device->name); 3545eb620c8SYosef Etigin goto out; 3555eb620c8SYosef Etigin } 3565eb620c8SYosef Etigin 35703db3a2dSMatan Barak ret = ib_cache_setup_one(device); 35803db3a2dSMatan Barak if (ret) { 359aba25a3eSParav Pandit pr_warn("Couldn't set up InfiniBand P_Key/GID cache\n"); 36003db3a2dSMatan Barak goto out; 36103db3a2dSMatan Barak } 36203db3a2dSMatan Barak 3633e153a93SIra Weiny memset(&device->attrs, 0, sizeof(device->attrs)); 3643e153a93SIra Weiny ret = device->query_device(device, &device->attrs, &uhw); 3653e153a93SIra Weiny if (ret) { 366aba25a3eSParav Pandit pr_warn("Couldn't query the device attributes\n"); 3675adebafbSLeon Romanovsky ib_cache_cleanup_one(device); 3683e153a93SIra Weiny goto out; 3693e153a93SIra Weiny } 3703e153a93SIra Weiny 3719a6edb60SRalph Campbell ret = ib_device_register_sysfs(device, port_callback); 3721da177e4SLinus Torvalds if (ret) { 373aba25a3eSParav Pandit pr_warn("Couldn't register device %s with driver model\n", 3741da177e4SLinus Torvalds device->name); 37503db3a2dSMatan Barak ib_cache_cleanup_one(device); 3761da177e4SLinus Torvalds goto out; 3771da177e4SLinus Torvalds } 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds device->reg_state = IB_DEV_REGISTERED; 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds list_for_each_entry(client, &client_list, list) 3821da177e4SLinus Torvalds if (client->add && !add_client_context(device, client)) 3831da177e4SLinus Torvalds client->add(device); 3841da177e4SLinus Torvalds 3855aa44bb9SHaggai Eran down_write(&lists_rwsem); 3865aa44bb9SHaggai Eran list_add_tail(&device->core_list, &device_list); 3875aa44bb9SHaggai Eran up_write(&lists_rwsem); 3881da177e4SLinus Torvalds out: 38995ed644fSIngo Molnar mutex_unlock(&device_mutex); 3901da177e4SLinus Torvalds return ret; 3911da177e4SLinus Torvalds } 3921da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_device); 3931da177e4SLinus Torvalds 3941da177e4SLinus Torvalds /** 3951da177e4SLinus Torvalds * ib_unregister_device - Unregister an IB device 3961da177e4SLinus Torvalds * @device:Device to unregister 3971da177e4SLinus Torvalds * 3981da177e4SLinus Torvalds * Unregister an IB device. All clients will receive a remove callback. 3991da177e4SLinus Torvalds */ 4001da177e4SLinus Torvalds void ib_unregister_device(struct ib_device *device) 4011da177e4SLinus Torvalds { 4021da177e4SLinus Torvalds struct ib_client_data *context, *tmp; 4031da177e4SLinus Torvalds unsigned long flags; 4041da177e4SLinus Torvalds 40595ed644fSIngo Molnar mutex_lock(&device_mutex); 4061da177e4SLinus Torvalds 4075aa44bb9SHaggai Eran down_write(&lists_rwsem); 4085aa44bb9SHaggai Eran list_del(&device->core_list); 4097c1eb45aSHaggai Eran spin_lock_irqsave(&device->client_data_lock, flags); 4107c1eb45aSHaggai Eran list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 4117c1eb45aSHaggai Eran context->going_down = true; 4127c1eb45aSHaggai Eran spin_unlock_irqrestore(&device->client_data_lock, flags); 4137c1eb45aSHaggai Eran downgrade_write(&lists_rwsem); 4145aa44bb9SHaggai Eran 4157c1eb45aSHaggai Eran list_for_each_entry_safe(context, tmp, &device->client_data_list, 4167c1eb45aSHaggai Eran list) { 4177c1eb45aSHaggai Eran if (context->client->remove) 4187c1eb45aSHaggai Eran context->client->remove(device, context->data); 4197c1eb45aSHaggai Eran } 4207c1eb45aSHaggai Eran up_read(&lists_rwsem); 4211da177e4SLinus Torvalds 42295ed644fSIngo Molnar mutex_unlock(&device_mutex); 4231da177e4SLinus Torvalds 4249206dff1SRoland Dreier ib_device_unregister_sysfs(device); 42503db3a2dSMatan Barak ib_cache_cleanup_one(device); 4269206dff1SRoland Dreier 4277c1eb45aSHaggai Eran down_write(&lists_rwsem); 4281da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 4291da177e4SLinus Torvalds list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 4301da177e4SLinus Torvalds kfree(context); 4311da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 4327c1eb45aSHaggai Eran up_write(&lists_rwsem); 4331da177e4SLinus Torvalds 4341da177e4SLinus Torvalds device->reg_state = IB_DEV_UNREGISTERED; 4351da177e4SLinus Torvalds } 4361da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_device); 4371da177e4SLinus Torvalds 4381da177e4SLinus Torvalds /** 4391da177e4SLinus Torvalds * ib_register_client - Register an IB client 4401da177e4SLinus Torvalds * @client:Client to register 4411da177e4SLinus Torvalds * 4421da177e4SLinus Torvalds * Upper level users of the IB drivers can use ib_register_client() to 4431da177e4SLinus Torvalds * register callbacks for IB device addition and removal. When an IB 4441da177e4SLinus Torvalds * device is added, each registered client's add method will be called 4451da177e4SLinus Torvalds * (in the order the clients were registered), and when a device is 4461da177e4SLinus Torvalds * removed, each client's remove method will be called (in the reverse 4471da177e4SLinus Torvalds * order that clients were registered). In addition, when 4481da177e4SLinus Torvalds * ib_register_client() is called, the client will receive an add 4491da177e4SLinus Torvalds * callback for all devices already registered. 4501da177e4SLinus Torvalds */ 4511da177e4SLinus Torvalds int ib_register_client(struct ib_client *client) 4521da177e4SLinus Torvalds { 4531da177e4SLinus Torvalds struct ib_device *device; 4541da177e4SLinus Torvalds 45595ed644fSIngo Molnar mutex_lock(&device_mutex); 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) 4581da177e4SLinus Torvalds if (client->add && !add_client_context(device, client)) 4591da177e4SLinus Torvalds client->add(device); 4601da177e4SLinus Torvalds 4615aa44bb9SHaggai Eran down_write(&lists_rwsem); 4625aa44bb9SHaggai Eran list_add_tail(&client->list, &client_list); 4635aa44bb9SHaggai Eran up_write(&lists_rwsem); 4645aa44bb9SHaggai Eran 46595ed644fSIngo Molnar mutex_unlock(&device_mutex); 4661da177e4SLinus Torvalds 4671da177e4SLinus Torvalds return 0; 4681da177e4SLinus Torvalds } 4691da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_client); 4701da177e4SLinus Torvalds 4711da177e4SLinus Torvalds /** 4721da177e4SLinus Torvalds * ib_unregister_client - Unregister an IB client 4731da177e4SLinus Torvalds * @client:Client to unregister 4741da177e4SLinus Torvalds * 4751da177e4SLinus Torvalds * Upper level users use ib_unregister_client() to remove their client 4761da177e4SLinus Torvalds * registration. When ib_unregister_client() is called, the client 4771da177e4SLinus Torvalds * will receive a remove callback for each IB device still registered. 4781da177e4SLinus Torvalds */ 4791da177e4SLinus Torvalds void ib_unregister_client(struct ib_client *client) 4801da177e4SLinus Torvalds { 4811da177e4SLinus Torvalds struct ib_client_data *context, *tmp; 4821da177e4SLinus Torvalds struct ib_device *device; 4831da177e4SLinus Torvalds unsigned long flags; 4841da177e4SLinus Torvalds 48595ed644fSIngo Molnar mutex_lock(&device_mutex); 4861da177e4SLinus Torvalds 4875aa44bb9SHaggai Eran down_write(&lists_rwsem); 4885aa44bb9SHaggai Eran list_del(&client->list); 4895aa44bb9SHaggai Eran up_write(&lists_rwsem); 4905aa44bb9SHaggai Eran 4911da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) { 4927c1eb45aSHaggai Eran struct ib_client_data *found_context = NULL; 4931da177e4SLinus Torvalds 4947c1eb45aSHaggai Eran down_write(&lists_rwsem); 4951da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 4961da177e4SLinus Torvalds list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 4971da177e4SLinus Torvalds if (context->client == client) { 4987c1eb45aSHaggai Eran context->going_down = true; 4997c1eb45aSHaggai Eran found_context = context; 5007c1eb45aSHaggai Eran break; 5011da177e4SLinus Torvalds } 5021da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 5037c1eb45aSHaggai Eran up_write(&lists_rwsem); 5047c1eb45aSHaggai Eran 5057c1eb45aSHaggai Eran if (client->remove) 5067c1eb45aSHaggai Eran client->remove(device, found_context ? 5077c1eb45aSHaggai Eran found_context->data : NULL); 5087c1eb45aSHaggai Eran 5097c1eb45aSHaggai Eran if (!found_context) { 5107c1eb45aSHaggai Eran pr_warn("No client context found for %s/%s\n", 5117c1eb45aSHaggai Eran device->name, client->name); 5127c1eb45aSHaggai Eran continue; 5137c1eb45aSHaggai Eran } 5147c1eb45aSHaggai Eran 5157c1eb45aSHaggai Eran down_write(&lists_rwsem); 5167c1eb45aSHaggai Eran spin_lock_irqsave(&device->client_data_lock, flags); 5177c1eb45aSHaggai Eran list_del(&found_context->list); 5187c1eb45aSHaggai Eran kfree(found_context); 5197c1eb45aSHaggai Eran spin_unlock_irqrestore(&device->client_data_lock, flags); 5207c1eb45aSHaggai Eran up_write(&lists_rwsem); 5211da177e4SLinus Torvalds } 5221da177e4SLinus Torvalds 52395ed644fSIngo Molnar mutex_unlock(&device_mutex); 5241da177e4SLinus Torvalds } 5251da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_client); 5261da177e4SLinus Torvalds 5271da177e4SLinus Torvalds /** 5281da177e4SLinus Torvalds * ib_get_client_data - Get IB client context 5291da177e4SLinus Torvalds * @device:Device to get context for 5301da177e4SLinus Torvalds * @client:Client to get context for 5311da177e4SLinus Torvalds * 5321da177e4SLinus Torvalds * ib_get_client_data() returns client context set with 5331da177e4SLinus Torvalds * ib_set_client_data(). 5341da177e4SLinus Torvalds */ 5351da177e4SLinus Torvalds void *ib_get_client_data(struct ib_device *device, struct ib_client *client) 5361da177e4SLinus Torvalds { 5371da177e4SLinus Torvalds struct ib_client_data *context; 5381da177e4SLinus Torvalds void *ret = NULL; 5391da177e4SLinus Torvalds unsigned long flags; 5401da177e4SLinus Torvalds 5411da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 5421da177e4SLinus Torvalds list_for_each_entry(context, &device->client_data_list, list) 5431da177e4SLinus Torvalds if (context->client == client) { 5441da177e4SLinus Torvalds ret = context->data; 5451da177e4SLinus Torvalds break; 5461da177e4SLinus Torvalds } 5471da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 5481da177e4SLinus Torvalds 5491da177e4SLinus Torvalds return ret; 5501da177e4SLinus Torvalds } 5511da177e4SLinus Torvalds EXPORT_SYMBOL(ib_get_client_data); 5521da177e4SLinus Torvalds 5531da177e4SLinus Torvalds /** 5549cd330d3SKrishna Kumar * ib_set_client_data - Set IB client context 5551da177e4SLinus Torvalds * @device:Device to set context for 5561da177e4SLinus Torvalds * @client:Client to set context for 5571da177e4SLinus Torvalds * @data:Context to set 5581da177e4SLinus Torvalds * 5591da177e4SLinus Torvalds * ib_set_client_data() sets client context that can be retrieved with 5601da177e4SLinus Torvalds * ib_get_client_data(). 5611da177e4SLinus Torvalds */ 5621da177e4SLinus Torvalds void ib_set_client_data(struct ib_device *device, struct ib_client *client, 5631da177e4SLinus Torvalds void *data) 5641da177e4SLinus Torvalds { 5651da177e4SLinus Torvalds struct ib_client_data *context; 5661da177e4SLinus Torvalds unsigned long flags; 5671da177e4SLinus Torvalds 5681da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 5691da177e4SLinus Torvalds list_for_each_entry(context, &device->client_data_list, list) 5701da177e4SLinus Torvalds if (context->client == client) { 5711da177e4SLinus Torvalds context->data = data; 5721da177e4SLinus Torvalds goto out; 5731da177e4SLinus Torvalds } 5741da177e4SLinus Torvalds 575aba25a3eSParav Pandit pr_warn("No client context found for %s/%s\n", 5761da177e4SLinus Torvalds device->name, client->name); 5771da177e4SLinus Torvalds 5781da177e4SLinus Torvalds out: 5791da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 5801da177e4SLinus Torvalds } 5811da177e4SLinus Torvalds EXPORT_SYMBOL(ib_set_client_data); 5821da177e4SLinus Torvalds 5831da177e4SLinus Torvalds /** 5841da177e4SLinus Torvalds * ib_register_event_handler - Register an IB event handler 5851da177e4SLinus Torvalds * @event_handler:Handler to register 5861da177e4SLinus Torvalds * 5871da177e4SLinus Torvalds * ib_register_event_handler() registers an event handler that will be 5881da177e4SLinus Torvalds * called back when asynchronous IB events occur (as defined in 5891da177e4SLinus Torvalds * chapter 11 of the InfiniBand Architecture Specification). This 5901da177e4SLinus Torvalds * callback may occur in interrupt context. 5911da177e4SLinus Torvalds */ 5921da177e4SLinus Torvalds int ib_register_event_handler (struct ib_event_handler *event_handler) 5931da177e4SLinus Torvalds { 5941da177e4SLinus Torvalds unsigned long flags; 5951da177e4SLinus Torvalds 5961da177e4SLinus Torvalds spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); 5971da177e4SLinus Torvalds list_add_tail(&event_handler->list, 5981da177e4SLinus Torvalds &event_handler->device->event_handler_list); 5991da177e4SLinus Torvalds spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds return 0; 6021da177e4SLinus Torvalds } 6031da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_event_handler); 6041da177e4SLinus Torvalds 6051da177e4SLinus Torvalds /** 6061da177e4SLinus Torvalds * ib_unregister_event_handler - Unregister an event handler 6071da177e4SLinus Torvalds * @event_handler:Handler to unregister 6081da177e4SLinus Torvalds * 6091da177e4SLinus Torvalds * Unregister an event handler registered with 6101da177e4SLinus Torvalds * ib_register_event_handler(). 6111da177e4SLinus Torvalds */ 6121da177e4SLinus Torvalds int ib_unregister_event_handler(struct ib_event_handler *event_handler) 6131da177e4SLinus Torvalds { 6141da177e4SLinus Torvalds unsigned long flags; 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); 6171da177e4SLinus Torvalds list_del(&event_handler->list); 6181da177e4SLinus Torvalds spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds return 0; 6211da177e4SLinus Torvalds } 6221da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_event_handler); 6231da177e4SLinus Torvalds 6241da177e4SLinus Torvalds /** 6251da177e4SLinus Torvalds * ib_dispatch_event - Dispatch an asynchronous event 6261da177e4SLinus Torvalds * @event:Event to dispatch 6271da177e4SLinus Torvalds * 6281da177e4SLinus Torvalds * Low-level drivers must call ib_dispatch_event() to dispatch the 6291da177e4SLinus Torvalds * event to all registered event handlers when an asynchronous event 6301da177e4SLinus Torvalds * occurs. 6311da177e4SLinus Torvalds */ 6321da177e4SLinus Torvalds void ib_dispatch_event(struct ib_event *event) 6331da177e4SLinus Torvalds { 6341da177e4SLinus Torvalds unsigned long flags; 6351da177e4SLinus Torvalds struct ib_event_handler *handler; 6361da177e4SLinus Torvalds 6371da177e4SLinus Torvalds spin_lock_irqsave(&event->device->event_handler_lock, flags); 6381da177e4SLinus Torvalds 6391da177e4SLinus Torvalds list_for_each_entry(handler, &event->device->event_handler_list, list) 6401da177e4SLinus Torvalds handler->handler(handler, event); 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds spin_unlock_irqrestore(&event->device->event_handler_lock, flags); 6431da177e4SLinus Torvalds } 6441da177e4SLinus Torvalds EXPORT_SYMBOL(ib_dispatch_event); 6451da177e4SLinus Torvalds 6461da177e4SLinus Torvalds /** 6471da177e4SLinus Torvalds * ib_query_port - Query IB port attributes 6481da177e4SLinus Torvalds * @device:Device to query 6491da177e4SLinus Torvalds * @port_num:Port number to query 6501da177e4SLinus Torvalds * @port_attr:Port attributes 6511da177e4SLinus Torvalds * 6521da177e4SLinus Torvalds * ib_query_port() returns the attributes of a port through the 6531da177e4SLinus Torvalds * @port_attr pointer. 6541da177e4SLinus Torvalds */ 6551da177e4SLinus Torvalds int ib_query_port(struct ib_device *device, 6561da177e4SLinus Torvalds u8 port_num, 6571da177e4SLinus Torvalds struct ib_port_attr *port_attr) 6581da177e4SLinus Torvalds { 659fad61ad4SEli Cohen union ib_gid gid; 660fad61ad4SEli Cohen int err; 661fad61ad4SEli Cohen 6620cf18d77SIra Weiny if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) 663116c0074SRoland Dreier return -EINVAL; 664116c0074SRoland Dreier 665fad61ad4SEli Cohen memset(port_attr, 0, sizeof(*port_attr)); 666fad61ad4SEli Cohen err = device->query_port(device, port_num, port_attr); 667fad61ad4SEli Cohen if (err || port_attr->subnet_prefix) 668fad61ad4SEli Cohen return err; 669fad61ad4SEli Cohen 670d7012467SEli Cohen if (rdma_port_get_link_layer(device, port_num) != IB_LINK_LAYER_INFINIBAND) 671d7012467SEli Cohen return 0; 672d7012467SEli Cohen 673fad61ad4SEli Cohen err = ib_query_gid(device, port_num, 0, &gid, NULL); 674fad61ad4SEli Cohen if (err) 675fad61ad4SEli Cohen return err; 676fad61ad4SEli Cohen 677fad61ad4SEli Cohen port_attr->subnet_prefix = be64_to_cpu(gid.global.subnet_prefix); 678fad61ad4SEli Cohen return 0; 6791da177e4SLinus Torvalds } 6801da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_port); 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds /** 6831da177e4SLinus Torvalds * ib_query_gid - Get GID table entry 6841da177e4SLinus Torvalds * @device:Device to query 6851da177e4SLinus Torvalds * @port_num:Port number to query 6861da177e4SLinus Torvalds * @index:GID table index to query 6871da177e4SLinus Torvalds * @gid:Returned GID 68855ee3ab2SMatan Barak * @attr: Returned GID attributes related to this GID index (only in RoCE). 68955ee3ab2SMatan Barak * NULL means ignore. 6901da177e4SLinus Torvalds * 6911da177e4SLinus Torvalds * ib_query_gid() fetches the specified GID table entry. 6921da177e4SLinus Torvalds */ 6931da177e4SLinus Torvalds int ib_query_gid(struct ib_device *device, 69455ee3ab2SMatan Barak u8 port_num, int index, union ib_gid *gid, 69555ee3ab2SMatan Barak struct ib_gid_attr *attr) 6961da177e4SLinus Torvalds { 69703db3a2dSMatan Barak if (rdma_cap_roce_gid_table(device, port_num)) 69855ee3ab2SMatan Barak return ib_get_cached_gid(device, port_num, index, gid, attr); 69955ee3ab2SMatan Barak 70055ee3ab2SMatan Barak if (attr) 70155ee3ab2SMatan Barak return -EINVAL; 70203db3a2dSMatan Barak 7031da177e4SLinus Torvalds return device->query_gid(device, port_num, index, gid); 7041da177e4SLinus Torvalds } 7051da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_gid); 7061da177e4SLinus Torvalds 7071da177e4SLinus Torvalds /** 70803db3a2dSMatan Barak * ib_enum_roce_netdev - enumerate all RoCE ports 70903db3a2dSMatan Barak * @ib_dev : IB device we want to query 71003db3a2dSMatan Barak * @filter: Should we call the callback? 71103db3a2dSMatan Barak * @filter_cookie: Cookie passed to filter 71203db3a2dSMatan Barak * @cb: Callback to call for each found RoCE ports 71303db3a2dSMatan Barak * @cookie: Cookie passed back to the callback 71403db3a2dSMatan Barak * 71503db3a2dSMatan Barak * Enumerates all of the physical RoCE ports of ib_dev 71603db3a2dSMatan Barak * which are related to netdevice and calls callback() on each 71703db3a2dSMatan Barak * device for which filter() function returns non zero. 71803db3a2dSMatan Barak */ 71903db3a2dSMatan Barak void ib_enum_roce_netdev(struct ib_device *ib_dev, 72003db3a2dSMatan Barak roce_netdev_filter filter, 72103db3a2dSMatan Barak void *filter_cookie, 72203db3a2dSMatan Barak roce_netdev_callback cb, 72303db3a2dSMatan Barak void *cookie) 72403db3a2dSMatan Barak { 72503db3a2dSMatan Barak u8 port; 72603db3a2dSMatan Barak 72703db3a2dSMatan Barak for (port = rdma_start_port(ib_dev); port <= rdma_end_port(ib_dev); 72803db3a2dSMatan Barak port++) 72903db3a2dSMatan Barak if (rdma_protocol_roce(ib_dev, port)) { 73003db3a2dSMatan Barak struct net_device *idev = NULL; 73103db3a2dSMatan Barak 73203db3a2dSMatan Barak if (ib_dev->get_netdev) 73303db3a2dSMatan Barak idev = ib_dev->get_netdev(ib_dev, port); 73403db3a2dSMatan Barak 73503db3a2dSMatan Barak if (idev && 73603db3a2dSMatan Barak idev->reg_state >= NETREG_UNREGISTERED) { 73703db3a2dSMatan Barak dev_put(idev); 73803db3a2dSMatan Barak idev = NULL; 73903db3a2dSMatan Barak } 74003db3a2dSMatan Barak 74103db3a2dSMatan Barak if (filter(ib_dev, port, idev, filter_cookie)) 74203db3a2dSMatan Barak cb(ib_dev, port, idev, cookie); 74303db3a2dSMatan Barak 74403db3a2dSMatan Barak if (idev) 74503db3a2dSMatan Barak dev_put(idev); 74603db3a2dSMatan Barak } 74703db3a2dSMatan Barak } 74803db3a2dSMatan Barak 74903db3a2dSMatan Barak /** 75003db3a2dSMatan Barak * ib_enum_all_roce_netdevs - enumerate all RoCE devices 75103db3a2dSMatan Barak * @filter: Should we call the callback? 75203db3a2dSMatan Barak * @filter_cookie: Cookie passed to filter 75303db3a2dSMatan Barak * @cb: Callback to call for each found RoCE ports 75403db3a2dSMatan Barak * @cookie: Cookie passed back to the callback 75503db3a2dSMatan Barak * 75603db3a2dSMatan Barak * Enumerates all RoCE devices' physical ports which are related 75703db3a2dSMatan Barak * to netdevices and calls callback() on each device for which 75803db3a2dSMatan Barak * filter() function returns non zero. 75903db3a2dSMatan Barak */ 76003db3a2dSMatan Barak void ib_enum_all_roce_netdevs(roce_netdev_filter filter, 76103db3a2dSMatan Barak void *filter_cookie, 76203db3a2dSMatan Barak roce_netdev_callback cb, 76303db3a2dSMatan Barak void *cookie) 76403db3a2dSMatan Barak { 76503db3a2dSMatan Barak struct ib_device *dev; 76603db3a2dSMatan Barak 76703db3a2dSMatan Barak down_read(&lists_rwsem); 76803db3a2dSMatan Barak list_for_each_entry(dev, &device_list, core_list) 76903db3a2dSMatan Barak ib_enum_roce_netdev(dev, filter, filter_cookie, cb, cookie); 77003db3a2dSMatan Barak up_read(&lists_rwsem); 77103db3a2dSMatan Barak } 77203db3a2dSMatan Barak 77303db3a2dSMatan Barak /** 7741da177e4SLinus Torvalds * ib_query_pkey - Get P_Key table entry 7751da177e4SLinus Torvalds * @device:Device to query 7761da177e4SLinus Torvalds * @port_num:Port number to query 7771da177e4SLinus Torvalds * @index:P_Key table index to query 7781da177e4SLinus Torvalds * @pkey:Returned P_Key 7791da177e4SLinus Torvalds * 7801da177e4SLinus Torvalds * ib_query_pkey() fetches the specified P_Key table entry. 7811da177e4SLinus Torvalds */ 7821da177e4SLinus Torvalds int ib_query_pkey(struct ib_device *device, 7831da177e4SLinus Torvalds u8 port_num, u16 index, u16 *pkey) 7841da177e4SLinus Torvalds { 7851da177e4SLinus Torvalds return device->query_pkey(device, port_num, index, pkey); 7861da177e4SLinus Torvalds } 7871da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_pkey); 7881da177e4SLinus Torvalds 7891da177e4SLinus Torvalds /** 7901da177e4SLinus Torvalds * ib_modify_device - Change IB device attributes 7911da177e4SLinus Torvalds * @device:Device to modify 7921da177e4SLinus Torvalds * @device_modify_mask:Mask of attributes to change 7931da177e4SLinus Torvalds * @device_modify:New attribute values 7941da177e4SLinus Torvalds * 7951da177e4SLinus Torvalds * ib_modify_device() changes a device's attributes as specified by 7961da177e4SLinus Torvalds * the @device_modify_mask and @device_modify structure. 7971da177e4SLinus Torvalds */ 7981da177e4SLinus Torvalds int ib_modify_device(struct ib_device *device, 7991da177e4SLinus Torvalds int device_modify_mask, 8001da177e4SLinus Torvalds struct ib_device_modify *device_modify) 8011da177e4SLinus Torvalds { 80210e1b54bSBart Van Assche if (!device->modify_device) 80310e1b54bSBart Van Assche return -ENOSYS; 80410e1b54bSBart Van Assche 8051da177e4SLinus Torvalds return device->modify_device(device, device_modify_mask, 8061da177e4SLinus Torvalds device_modify); 8071da177e4SLinus Torvalds } 8081da177e4SLinus Torvalds EXPORT_SYMBOL(ib_modify_device); 8091da177e4SLinus Torvalds 8101da177e4SLinus Torvalds /** 8111da177e4SLinus Torvalds * ib_modify_port - Modifies the attributes for the specified port. 8121da177e4SLinus Torvalds * @device: The device to modify. 8131da177e4SLinus Torvalds * @port_num: The number of the port to modify. 8141da177e4SLinus Torvalds * @port_modify_mask: Mask used to specify which attributes of the port 8151da177e4SLinus Torvalds * to change. 8161da177e4SLinus Torvalds * @port_modify: New attribute values for the port. 8171da177e4SLinus Torvalds * 8181da177e4SLinus Torvalds * ib_modify_port() changes a port's attributes as specified by the 8191da177e4SLinus Torvalds * @port_modify_mask and @port_modify structure. 8201da177e4SLinus Torvalds */ 8211da177e4SLinus Torvalds int ib_modify_port(struct ib_device *device, 8221da177e4SLinus Torvalds u8 port_num, int port_modify_mask, 8231da177e4SLinus Torvalds struct ib_port_modify *port_modify) 8241da177e4SLinus Torvalds { 82510e1b54bSBart Van Assche if (!device->modify_port) 82610e1b54bSBart Van Assche return -ENOSYS; 82710e1b54bSBart Van Assche 8280cf18d77SIra Weiny if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) 829116c0074SRoland Dreier return -EINVAL; 830116c0074SRoland Dreier 8311da177e4SLinus Torvalds return device->modify_port(device, port_num, port_modify_mask, 8321da177e4SLinus Torvalds port_modify); 8331da177e4SLinus Torvalds } 8341da177e4SLinus Torvalds EXPORT_SYMBOL(ib_modify_port); 8351da177e4SLinus Torvalds 8365eb620c8SYosef Etigin /** 8375eb620c8SYosef Etigin * ib_find_gid - Returns the port number and GID table index where 8385eb620c8SYosef Etigin * a specified GID value occurs. 8395eb620c8SYosef Etigin * @device: The device to query. 8405eb620c8SYosef Etigin * @gid: The GID value to search for. 841b39ffa1dSMatan Barak * @gid_type: Type of GID. 84255ee3ab2SMatan Barak * @ndev: The ndev related to the GID to search for. 8435eb620c8SYosef Etigin * @port_num: The port number of the device where the GID value was found. 8445eb620c8SYosef Etigin * @index: The index into the GID table where the GID was found. This 8455eb620c8SYosef Etigin * parameter may be NULL. 8465eb620c8SYosef Etigin */ 8475eb620c8SYosef Etigin int ib_find_gid(struct ib_device *device, union ib_gid *gid, 848b39ffa1dSMatan Barak enum ib_gid_type gid_type, struct net_device *ndev, 849b39ffa1dSMatan Barak u8 *port_num, u16 *index) 8505eb620c8SYosef Etigin { 8515eb620c8SYosef Etigin union ib_gid tmp_gid; 8525eb620c8SYosef Etigin int ret, port, i; 8535eb620c8SYosef Etigin 8540cf18d77SIra Weiny for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) { 85503db3a2dSMatan Barak if (rdma_cap_roce_gid_table(device, port)) { 856b39ffa1dSMatan Barak if (!ib_find_cached_gid_by_port(device, gid, gid_type, port, 85755ee3ab2SMatan Barak ndev, index)) { 85803db3a2dSMatan Barak *port_num = port; 85903db3a2dSMatan Barak return 0; 86003db3a2dSMatan Barak } 86198d25afaSDan Carpenter } 86203db3a2dSMatan Barak 863b39ffa1dSMatan Barak if (gid_type != IB_GID_TYPE_IB) 864b39ffa1dSMatan Barak continue; 865b39ffa1dSMatan Barak 8667738613eSIra Weiny for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) { 86755ee3ab2SMatan Barak ret = ib_query_gid(device, port, i, &tmp_gid, NULL); 8685eb620c8SYosef Etigin if (ret) 8695eb620c8SYosef Etigin return ret; 8705eb620c8SYosef Etigin if (!memcmp(&tmp_gid, gid, sizeof *gid)) { 8715eb620c8SYosef Etigin *port_num = port; 8725eb620c8SYosef Etigin if (index) 8735eb620c8SYosef Etigin *index = i; 8745eb620c8SYosef Etigin return 0; 8755eb620c8SYosef Etigin } 8765eb620c8SYosef Etigin } 8775eb620c8SYosef Etigin } 8785eb620c8SYosef Etigin 8795eb620c8SYosef Etigin return -ENOENT; 8805eb620c8SYosef Etigin } 8815eb620c8SYosef Etigin EXPORT_SYMBOL(ib_find_gid); 8825eb620c8SYosef Etigin 8835eb620c8SYosef Etigin /** 8845eb620c8SYosef Etigin * ib_find_pkey - Returns the PKey table index where a specified 8855eb620c8SYosef Etigin * PKey value occurs. 8865eb620c8SYosef Etigin * @device: The device to query. 8875eb620c8SYosef Etigin * @port_num: The port number of the device to search for the PKey. 8885eb620c8SYosef Etigin * @pkey: The PKey value to search for. 8895eb620c8SYosef Etigin * @index: The index into the PKey table where the PKey was found. 8905eb620c8SYosef Etigin */ 8915eb620c8SYosef Etigin int ib_find_pkey(struct ib_device *device, 8925eb620c8SYosef Etigin u8 port_num, u16 pkey, u16 *index) 8935eb620c8SYosef Etigin { 8945eb620c8SYosef Etigin int ret, i; 8955eb620c8SYosef Etigin u16 tmp_pkey; 896ff7166c4SJack Morgenstein int partial_ix = -1; 8975eb620c8SYosef Etigin 8987738613eSIra Weiny for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) { 8995eb620c8SYosef Etigin ret = ib_query_pkey(device, port_num, i, &tmp_pkey); 9005eb620c8SYosef Etigin if (ret) 9015eb620c8SYosef Etigin return ret; 90236026eccSMoni Shoua if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) { 903ff7166c4SJack Morgenstein /* if there is full-member pkey take it.*/ 904ff7166c4SJack Morgenstein if (tmp_pkey & 0x8000) { 9055eb620c8SYosef Etigin *index = i; 9065eb620c8SYosef Etigin return 0; 9075eb620c8SYosef Etigin } 908ff7166c4SJack Morgenstein if (partial_ix < 0) 909ff7166c4SJack Morgenstein partial_ix = i; 910ff7166c4SJack Morgenstein } 9115eb620c8SYosef Etigin } 9125eb620c8SYosef Etigin 913ff7166c4SJack Morgenstein /*no full-member, if exists take the limited*/ 914ff7166c4SJack Morgenstein if (partial_ix >= 0) { 915ff7166c4SJack Morgenstein *index = partial_ix; 916ff7166c4SJack Morgenstein return 0; 917ff7166c4SJack Morgenstein } 9185eb620c8SYosef Etigin return -ENOENT; 9195eb620c8SYosef Etigin } 9205eb620c8SYosef Etigin EXPORT_SYMBOL(ib_find_pkey); 9215eb620c8SYosef Etigin 9229268f72dSYotam Kenneth /** 9239268f72dSYotam Kenneth * ib_get_net_dev_by_params() - Return the appropriate net_dev 9249268f72dSYotam Kenneth * for a received CM request 9259268f72dSYotam Kenneth * @dev: An RDMA device on which the request has been received. 9269268f72dSYotam Kenneth * @port: Port number on the RDMA device. 9279268f72dSYotam Kenneth * @pkey: The Pkey the request came on. 9289268f72dSYotam Kenneth * @gid: A GID that the net_dev uses to communicate. 9299268f72dSYotam Kenneth * @addr: Contains the IP address that the request specified as its 9309268f72dSYotam Kenneth * destination. 9319268f72dSYotam Kenneth */ 9329268f72dSYotam Kenneth struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, 9339268f72dSYotam Kenneth u8 port, 9349268f72dSYotam Kenneth u16 pkey, 9359268f72dSYotam Kenneth const union ib_gid *gid, 9369268f72dSYotam Kenneth const struct sockaddr *addr) 9379268f72dSYotam Kenneth { 9389268f72dSYotam Kenneth struct net_device *net_dev = NULL; 9399268f72dSYotam Kenneth struct ib_client_data *context; 9409268f72dSYotam Kenneth 9419268f72dSYotam Kenneth if (!rdma_protocol_ib(dev, port)) 9429268f72dSYotam Kenneth return NULL; 9439268f72dSYotam Kenneth 9449268f72dSYotam Kenneth down_read(&lists_rwsem); 9459268f72dSYotam Kenneth 9469268f72dSYotam Kenneth list_for_each_entry(context, &dev->client_data_list, list) { 9479268f72dSYotam Kenneth struct ib_client *client = context->client; 9489268f72dSYotam Kenneth 9499268f72dSYotam Kenneth if (context->going_down) 9509268f72dSYotam Kenneth continue; 9519268f72dSYotam Kenneth 9529268f72dSYotam Kenneth if (client->get_net_dev_by_params) { 9539268f72dSYotam Kenneth net_dev = client->get_net_dev_by_params(dev, port, pkey, 9549268f72dSYotam Kenneth gid, addr, 9559268f72dSYotam Kenneth context->data); 9569268f72dSYotam Kenneth if (net_dev) 9579268f72dSYotam Kenneth break; 9589268f72dSYotam Kenneth } 9599268f72dSYotam Kenneth } 9609268f72dSYotam Kenneth 9619268f72dSYotam Kenneth up_read(&lists_rwsem); 9629268f72dSYotam Kenneth 9639268f72dSYotam Kenneth return net_dev; 9649268f72dSYotam Kenneth } 9659268f72dSYotam Kenneth EXPORT_SYMBOL(ib_get_net_dev_by_params); 9669268f72dSYotam Kenneth 967735c631aSMark Bloch static struct ibnl_client_cbs ibnl_ls_cb_table[] = { 968735c631aSMark Bloch [RDMA_NL_LS_OP_RESOLVE] = { 969735c631aSMark Bloch .dump = ib_nl_handle_resolve_resp, 970735c631aSMark Bloch .module = THIS_MODULE }, 971735c631aSMark Bloch [RDMA_NL_LS_OP_SET_TIMEOUT] = { 972735c631aSMark Bloch .dump = ib_nl_handle_set_timeout, 973735c631aSMark Bloch .module = THIS_MODULE }, 974ae43f828SMark Bloch [RDMA_NL_LS_OP_IP_RESOLVE] = { 975ae43f828SMark Bloch .dump = ib_nl_handle_ip_res_resp, 976ae43f828SMark Bloch .module = THIS_MODULE }, 977735c631aSMark Bloch }; 978735c631aSMark Bloch 979735c631aSMark Bloch static int ib_add_ibnl_clients(void) 980735c631aSMark Bloch { 981735c631aSMark Bloch return ibnl_add_client(RDMA_NL_LS, ARRAY_SIZE(ibnl_ls_cb_table), 982735c631aSMark Bloch ibnl_ls_cb_table); 983735c631aSMark Bloch } 984735c631aSMark Bloch 985735c631aSMark Bloch static void ib_remove_ibnl_clients(void) 986735c631aSMark Bloch { 987735c631aSMark Bloch ibnl_remove_client(RDMA_NL_LS); 988735c631aSMark Bloch } 989735c631aSMark Bloch 9901da177e4SLinus Torvalds static int __init ib_core_init(void) 9911da177e4SLinus Torvalds { 9921da177e4SLinus Torvalds int ret; 9931da177e4SLinus Torvalds 994f0626710STejun Heo ib_wq = alloc_workqueue("infiniband", 0, 0); 995f0626710STejun Heo if (!ib_wq) 996f0626710STejun Heo return -ENOMEM; 997f0626710STejun Heo 99814d3a3b2SChristoph Hellwig ib_comp_wq = alloc_workqueue("ib-comp-wq", 99914d3a3b2SChristoph Hellwig WQ_UNBOUND | WQ_HIGHPRI | WQ_MEM_RECLAIM, 100014d3a3b2SChristoph Hellwig WQ_UNBOUND_MAX_ACTIVE); 100114d3a3b2SChristoph Hellwig if (!ib_comp_wq) { 100214d3a3b2SChristoph Hellwig ret = -ENOMEM; 100314d3a3b2SChristoph Hellwig goto err; 100414d3a3b2SChristoph Hellwig } 100514d3a3b2SChristoph Hellwig 100655aeed06SJason Gunthorpe ret = class_register(&ib_class); 1007fd75c789SNir Muchtar if (ret) { 1008aba25a3eSParav Pandit pr_warn("Couldn't create InfiniBand device class\n"); 100914d3a3b2SChristoph Hellwig goto err_comp; 1010fd75c789SNir Muchtar } 10111da177e4SLinus Torvalds 1012b2cbae2cSRoland Dreier ret = ibnl_init(); 10131da177e4SLinus Torvalds if (ret) { 1014aba25a3eSParav Pandit pr_warn("Couldn't init IB netlink interface\n"); 1015fd75c789SNir Muchtar goto err_sysfs; 10161da177e4SLinus Torvalds } 10171da177e4SLinus Torvalds 1018e3f20f02SLeon Romanovsky ret = addr_init(); 1019e3f20f02SLeon Romanovsky if (ret) { 1020e3f20f02SLeon Romanovsky pr_warn("Could't init IB address resolution\n"); 1021e3f20f02SLeon Romanovsky goto err_ibnl; 1022e3f20f02SLeon Romanovsky } 1023e3f20f02SLeon Romanovsky 10244c2cb422SMark Bloch ret = ib_mad_init(); 10254c2cb422SMark Bloch if (ret) { 10264c2cb422SMark Bloch pr_warn("Couldn't init IB MAD\n"); 10274c2cb422SMark Bloch goto err_addr; 10284c2cb422SMark Bloch } 10294c2cb422SMark Bloch 1030c2e49c92SMark Bloch ret = ib_sa_init(); 1031c2e49c92SMark Bloch if (ret) { 1032c2e49c92SMark Bloch pr_warn("Couldn't init SA\n"); 1033c2e49c92SMark Bloch goto err_mad; 1034c2e49c92SMark Bloch } 1035c2e49c92SMark Bloch 1036da1f857bSDan Carpenter ret = ib_add_ibnl_clients(); 1037da1f857bSDan Carpenter if (ret) { 1038735c631aSMark Bloch pr_warn("Couldn't register ibnl clients\n"); 1039735c631aSMark Bloch goto err_sa; 1040735c631aSMark Bloch } 1041735c631aSMark Bloch 104203db3a2dSMatan Barak ib_cache_setup(); 1043b2cbae2cSRoland Dreier 1044fd75c789SNir Muchtar return 0; 1045fd75c789SNir Muchtar 1046735c631aSMark Bloch err_sa: 1047735c631aSMark Bloch ib_sa_cleanup(); 1048c2e49c92SMark Bloch err_mad: 1049c2e49c92SMark Bloch ib_mad_cleanup(); 10504c2cb422SMark Bloch err_addr: 10514c2cb422SMark Bloch addr_cleanup(); 1052e3f20f02SLeon Romanovsky err_ibnl: 1053e3f20f02SLeon Romanovsky ibnl_cleanup(); 1054fd75c789SNir Muchtar err_sysfs: 105555aeed06SJason Gunthorpe class_unregister(&ib_class); 105614d3a3b2SChristoph Hellwig err_comp: 105714d3a3b2SChristoph Hellwig destroy_workqueue(ib_comp_wq); 1058fd75c789SNir Muchtar err: 1059fd75c789SNir Muchtar destroy_workqueue(ib_wq); 10601da177e4SLinus Torvalds return ret; 10611da177e4SLinus Torvalds } 10621da177e4SLinus Torvalds 10631da177e4SLinus Torvalds static void __exit ib_core_cleanup(void) 10641da177e4SLinus Torvalds { 10651da177e4SLinus Torvalds ib_cache_cleanup(); 1066735c631aSMark Bloch ib_remove_ibnl_clients(); 1067c2e49c92SMark Bloch ib_sa_cleanup(); 10684c2cb422SMark Bloch ib_mad_cleanup(); 1069e3f20f02SLeon Romanovsky addr_cleanup(); 1070b2cbae2cSRoland Dreier ibnl_cleanup(); 107155aeed06SJason Gunthorpe class_unregister(&ib_class); 107214d3a3b2SChristoph Hellwig destroy_workqueue(ib_comp_wq); 1073f7c6a7b5SRoland Dreier /* Make sure that any pending umem accounting work is done. */ 1074f0626710STejun Heo destroy_workqueue(ib_wq); 10751da177e4SLinus Torvalds } 10761da177e4SLinus Torvalds 10771da177e4SLinus Torvalds module_init(ib_core_init); 10781da177e4SLinus Torvalds module_exit(ib_core_cleanup); 1079