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 36343579b5fSParav Pandit ret = ib_device_register_rdmacg(device); 36443579b5fSParav Pandit if (ret) { 36543579b5fSParav Pandit pr_warn("Couldn't register device with rdma cgroup\n"); 36643579b5fSParav Pandit ib_cache_cleanup_one(device); 36743579b5fSParav Pandit goto out; 36843579b5fSParav Pandit } 36943579b5fSParav Pandit 3703e153a93SIra Weiny memset(&device->attrs, 0, sizeof(device->attrs)); 3713e153a93SIra Weiny ret = device->query_device(device, &device->attrs, &uhw); 3723e153a93SIra Weiny if (ret) { 373aba25a3eSParav Pandit pr_warn("Couldn't query the device attributes\n"); 37443579b5fSParav Pandit ib_device_unregister_rdmacg(device); 3755adebafbSLeon Romanovsky ib_cache_cleanup_one(device); 3763e153a93SIra Weiny goto out; 3773e153a93SIra Weiny } 3783e153a93SIra Weiny 3799a6edb60SRalph Campbell ret = ib_device_register_sysfs(device, port_callback); 3801da177e4SLinus Torvalds if (ret) { 381aba25a3eSParav Pandit pr_warn("Couldn't register device %s with driver model\n", 3821da177e4SLinus Torvalds device->name); 38343579b5fSParav Pandit ib_device_unregister_rdmacg(device); 38403db3a2dSMatan Barak ib_cache_cleanup_one(device); 3851da177e4SLinus Torvalds goto out; 3861da177e4SLinus Torvalds } 3871da177e4SLinus Torvalds 3881da177e4SLinus Torvalds device->reg_state = IB_DEV_REGISTERED; 3891da177e4SLinus Torvalds 3901da177e4SLinus Torvalds list_for_each_entry(client, &client_list, list) 3911da177e4SLinus Torvalds if (client->add && !add_client_context(device, client)) 3921da177e4SLinus Torvalds client->add(device); 3931da177e4SLinus Torvalds 3945aa44bb9SHaggai Eran down_write(&lists_rwsem); 3955aa44bb9SHaggai Eran list_add_tail(&device->core_list, &device_list); 3965aa44bb9SHaggai Eran up_write(&lists_rwsem); 3971da177e4SLinus Torvalds out: 39895ed644fSIngo Molnar mutex_unlock(&device_mutex); 3991da177e4SLinus Torvalds return ret; 4001da177e4SLinus Torvalds } 4011da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_device); 4021da177e4SLinus Torvalds 4031da177e4SLinus Torvalds /** 4041da177e4SLinus Torvalds * ib_unregister_device - Unregister an IB device 4051da177e4SLinus Torvalds * @device:Device to unregister 4061da177e4SLinus Torvalds * 4071da177e4SLinus Torvalds * Unregister an IB device. All clients will receive a remove callback. 4081da177e4SLinus Torvalds */ 4091da177e4SLinus Torvalds void ib_unregister_device(struct ib_device *device) 4101da177e4SLinus Torvalds { 4111da177e4SLinus Torvalds struct ib_client_data *context, *tmp; 4121da177e4SLinus Torvalds unsigned long flags; 4131da177e4SLinus Torvalds 41495ed644fSIngo Molnar mutex_lock(&device_mutex); 4151da177e4SLinus Torvalds 4165aa44bb9SHaggai Eran down_write(&lists_rwsem); 4175aa44bb9SHaggai Eran list_del(&device->core_list); 4187c1eb45aSHaggai Eran spin_lock_irqsave(&device->client_data_lock, flags); 4197c1eb45aSHaggai Eran list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 4207c1eb45aSHaggai Eran context->going_down = true; 4217c1eb45aSHaggai Eran spin_unlock_irqrestore(&device->client_data_lock, flags); 4227c1eb45aSHaggai Eran downgrade_write(&lists_rwsem); 4235aa44bb9SHaggai Eran 4247c1eb45aSHaggai Eran list_for_each_entry_safe(context, tmp, &device->client_data_list, 4257c1eb45aSHaggai Eran list) { 4267c1eb45aSHaggai Eran if (context->client->remove) 4277c1eb45aSHaggai Eran context->client->remove(device, context->data); 4287c1eb45aSHaggai Eran } 4297c1eb45aSHaggai Eran up_read(&lists_rwsem); 4301da177e4SLinus Torvalds 43195ed644fSIngo Molnar mutex_unlock(&device_mutex); 4321da177e4SLinus Torvalds 43343579b5fSParav Pandit ib_device_unregister_rdmacg(device); 4349206dff1SRoland Dreier ib_device_unregister_sysfs(device); 43503db3a2dSMatan Barak ib_cache_cleanup_one(device); 4369206dff1SRoland Dreier 4377c1eb45aSHaggai Eran down_write(&lists_rwsem); 4381da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 4391da177e4SLinus Torvalds list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 4401da177e4SLinus Torvalds kfree(context); 4411da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 4427c1eb45aSHaggai Eran up_write(&lists_rwsem); 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds device->reg_state = IB_DEV_UNREGISTERED; 4451da177e4SLinus Torvalds } 4461da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_device); 4471da177e4SLinus Torvalds 4481da177e4SLinus Torvalds /** 4491da177e4SLinus Torvalds * ib_register_client - Register an IB client 4501da177e4SLinus Torvalds * @client:Client to register 4511da177e4SLinus Torvalds * 4521da177e4SLinus Torvalds * Upper level users of the IB drivers can use ib_register_client() to 4531da177e4SLinus Torvalds * register callbacks for IB device addition and removal. When an IB 4541da177e4SLinus Torvalds * device is added, each registered client's add method will be called 4551da177e4SLinus Torvalds * (in the order the clients were registered), and when a device is 4561da177e4SLinus Torvalds * removed, each client's remove method will be called (in the reverse 4571da177e4SLinus Torvalds * order that clients were registered). In addition, when 4581da177e4SLinus Torvalds * ib_register_client() is called, the client will receive an add 4591da177e4SLinus Torvalds * callback for all devices already registered. 4601da177e4SLinus Torvalds */ 4611da177e4SLinus Torvalds int ib_register_client(struct ib_client *client) 4621da177e4SLinus Torvalds { 4631da177e4SLinus Torvalds struct ib_device *device; 4641da177e4SLinus Torvalds 46595ed644fSIngo Molnar mutex_lock(&device_mutex); 4661da177e4SLinus Torvalds 4671da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) 4681da177e4SLinus Torvalds if (client->add && !add_client_context(device, client)) 4691da177e4SLinus Torvalds client->add(device); 4701da177e4SLinus Torvalds 4715aa44bb9SHaggai Eran down_write(&lists_rwsem); 4725aa44bb9SHaggai Eran list_add_tail(&client->list, &client_list); 4735aa44bb9SHaggai Eran up_write(&lists_rwsem); 4745aa44bb9SHaggai Eran 47595ed644fSIngo Molnar mutex_unlock(&device_mutex); 4761da177e4SLinus Torvalds 4771da177e4SLinus Torvalds return 0; 4781da177e4SLinus Torvalds } 4791da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_client); 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds /** 4821da177e4SLinus Torvalds * ib_unregister_client - Unregister an IB client 4831da177e4SLinus Torvalds * @client:Client to unregister 4841da177e4SLinus Torvalds * 4851da177e4SLinus Torvalds * Upper level users use ib_unregister_client() to remove their client 4861da177e4SLinus Torvalds * registration. When ib_unregister_client() is called, the client 4871da177e4SLinus Torvalds * will receive a remove callback for each IB device still registered. 4881da177e4SLinus Torvalds */ 4891da177e4SLinus Torvalds void ib_unregister_client(struct ib_client *client) 4901da177e4SLinus Torvalds { 4911da177e4SLinus Torvalds struct ib_client_data *context, *tmp; 4921da177e4SLinus Torvalds struct ib_device *device; 4931da177e4SLinus Torvalds unsigned long flags; 4941da177e4SLinus Torvalds 49595ed644fSIngo Molnar mutex_lock(&device_mutex); 4961da177e4SLinus Torvalds 4975aa44bb9SHaggai Eran down_write(&lists_rwsem); 4985aa44bb9SHaggai Eran list_del(&client->list); 4995aa44bb9SHaggai Eran up_write(&lists_rwsem); 5005aa44bb9SHaggai Eran 5011da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) { 5027c1eb45aSHaggai Eran struct ib_client_data *found_context = NULL; 5031da177e4SLinus Torvalds 5047c1eb45aSHaggai Eran down_write(&lists_rwsem); 5051da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 5061da177e4SLinus Torvalds list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 5071da177e4SLinus Torvalds if (context->client == client) { 5087c1eb45aSHaggai Eran context->going_down = true; 5097c1eb45aSHaggai Eran found_context = context; 5107c1eb45aSHaggai Eran break; 5111da177e4SLinus Torvalds } 5121da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 5137c1eb45aSHaggai Eran up_write(&lists_rwsem); 5147c1eb45aSHaggai Eran 5157c1eb45aSHaggai Eran if (client->remove) 5167c1eb45aSHaggai Eran client->remove(device, found_context ? 5177c1eb45aSHaggai Eran found_context->data : NULL); 5187c1eb45aSHaggai Eran 5197c1eb45aSHaggai Eran if (!found_context) { 5207c1eb45aSHaggai Eran pr_warn("No client context found for %s/%s\n", 5217c1eb45aSHaggai Eran device->name, client->name); 5227c1eb45aSHaggai Eran continue; 5237c1eb45aSHaggai Eran } 5247c1eb45aSHaggai Eran 5257c1eb45aSHaggai Eran down_write(&lists_rwsem); 5267c1eb45aSHaggai Eran spin_lock_irqsave(&device->client_data_lock, flags); 5277c1eb45aSHaggai Eran list_del(&found_context->list); 5287c1eb45aSHaggai Eran kfree(found_context); 5297c1eb45aSHaggai Eran spin_unlock_irqrestore(&device->client_data_lock, flags); 5307c1eb45aSHaggai Eran up_write(&lists_rwsem); 5311da177e4SLinus Torvalds } 5321da177e4SLinus Torvalds 53395ed644fSIngo Molnar mutex_unlock(&device_mutex); 5341da177e4SLinus Torvalds } 5351da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_client); 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds /** 5381da177e4SLinus Torvalds * ib_get_client_data - Get IB client context 5391da177e4SLinus Torvalds * @device:Device to get context for 5401da177e4SLinus Torvalds * @client:Client to get context for 5411da177e4SLinus Torvalds * 5421da177e4SLinus Torvalds * ib_get_client_data() returns client context set with 5431da177e4SLinus Torvalds * ib_set_client_data(). 5441da177e4SLinus Torvalds */ 5451da177e4SLinus Torvalds void *ib_get_client_data(struct ib_device *device, struct ib_client *client) 5461da177e4SLinus Torvalds { 5471da177e4SLinus Torvalds struct ib_client_data *context; 5481da177e4SLinus Torvalds void *ret = NULL; 5491da177e4SLinus Torvalds unsigned long flags; 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 5521da177e4SLinus Torvalds list_for_each_entry(context, &device->client_data_list, list) 5531da177e4SLinus Torvalds if (context->client == client) { 5541da177e4SLinus Torvalds ret = context->data; 5551da177e4SLinus Torvalds break; 5561da177e4SLinus Torvalds } 5571da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 5581da177e4SLinus Torvalds 5591da177e4SLinus Torvalds return ret; 5601da177e4SLinus Torvalds } 5611da177e4SLinus Torvalds EXPORT_SYMBOL(ib_get_client_data); 5621da177e4SLinus Torvalds 5631da177e4SLinus Torvalds /** 5649cd330d3SKrishna Kumar * ib_set_client_data - Set IB client context 5651da177e4SLinus Torvalds * @device:Device to set context for 5661da177e4SLinus Torvalds * @client:Client to set context for 5671da177e4SLinus Torvalds * @data:Context to set 5681da177e4SLinus Torvalds * 5691da177e4SLinus Torvalds * ib_set_client_data() sets client context that can be retrieved with 5701da177e4SLinus Torvalds * ib_get_client_data(). 5711da177e4SLinus Torvalds */ 5721da177e4SLinus Torvalds void ib_set_client_data(struct ib_device *device, struct ib_client *client, 5731da177e4SLinus Torvalds void *data) 5741da177e4SLinus Torvalds { 5751da177e4SLinus Torvalds struct ib_client_data *context; 5761da177e4SLinus Torvalds unsigned long flags; 5771da177e4SLinus Torvalds 5781da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 5791da177e4SLinus Torvalds list_for_each_entry(context, &device->client_data_list, list) 5801da177e4SLinus Torvalds if (context->client == client) { 5811da177e4SLinus Torvalds context->data = data; 5821da177e4SLinus Torvalds goto out; 5831da177e4SLinus Torvalds } 5841da177e4SLinus Torvalds 585aba25a3eSParav Pandit pr_warn("No client context found for %s/%s\n", 5861da177e4SLinus Torvalds device->name, client->name); 5871da177e4SLinus Torvalds 5881da177e4SLinus Torvalds out: 5891da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 5901da177e4SLinus Torvalds } 5911da177e4SLinus Torvalds EXPORT_SYMBOL(ib_set_client_data); 5921da177e4SLinus Torvalds 5931da177e4SLinus Torvalds /** 5941da177e4SLinus Torvalds * ib_register_event_handler - Register an IB event handler 5951da177e4SLinus Torvalds * @event_handler:Handler to register 5961da177e4SLinus Torvalds * 5971da177e4SLinus Torvalds * ib_register_event_handler() registers an event handler that will be 5981da177e4SLinus Torvalds * called back when asynchronous IB events occur (as defined in 5991da177e4SLinus Torvalds * chapter 11 of the InfiniBand Architecture Specification). This 6001da177e4SLinus Torvalds * callback may occur in interrupt context. 6011da177e4SLinus Torvalds */ 6021da177e4SLinus Torvalds int ib_register_event_handler (struct ib_event_handler *event_handler) 6031da177e4SLinus Torvalds { 6041da177e4SLinus Torvalds unsigned long flags; 6051da177e4SLinus Torvalds 6061da177e4SLinus Torvalds spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); 6071da177e4SLinus Torvalds list_add_tail(&event_handler->list, 6081da177e4SLinus Torvalds &event_handler->device->event_handler_list); 6091da177e4SLinus Torvalds spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); 6101da177e4SLinus Torvalds 6111da177e4SLinus Torvalds return 0; 6121da177e4SLinus Torvalds } 6131da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_event_handler); 6141da177e4SLinus Torvalds 6151da177e4SLinus Torvalds /** 6161da177e4SLinus Torvalds * ib_unregister_event_handler - Unregister an event handler 6171da177e4SLinus Torvalds * @event_handler:Handler to unregister 6181da177e4SLinus Torvalds * 6191da177e4SLinus Torvalds * Unregister an event handler registered with 6201da177e4SLinus Torvalds * ib_register_event_handler(). 6211da177e4SLinus Torvalds */ 6221da177e4SLinus Torvalds int ib_unregister_event_handler(struct ib_event_handler *event_handler) 6231da177e4SLinus Torvalds { 6241da177e4SLinus Torvalds unsigned long flags; 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); 6271da177e4SLinus Torvalds list_del(&event_handler->list); 6281da177e4SLinus Torvalds spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds return 0; 6311da177e4SLinus Torvalds } 6321da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_event_handler); 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds /** 6351da177e4SLinus Torvalds * ib_dispatch_event - Dispatch an asynchronous event 6361da177e4SLinus Torvalds * @event:Event to dispatch 6371da177e4SLinus Torvalds * 6381da177e4SLinus Torvalds * Low-level drivers must call ib_dispatch_event() to dispatch the 6391da177e4SLinus Torvalds * event to all registered event handlers when an asynchronous event 6401da177e4SLinus Torvalds * occurs. 6411da177e4SLinus Torvalds */ 6421da177e4SLinus Torvalds void ib_dispatch_event(struct ib_event *event) 6431da177e4SLinus Torvalds { 6441da177e4SLinus Torvalds unsigned long flags; 6451da177e4SLinus Torvalds struct ib_event_handler *handler; 6461da177e4SLinus Torvalds 6471da177e4SLinus Torvalds spin_lock_irqsave(&event->device->event_handler_lock, flags); 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds list_for_each_entry(handler, &event->device->event_handler_list, list) 6501da177e4SLinus Torvalds handler->handler(handler, event); 6511da177e4SLinus Torvalds 6521da177e4SLinus Torvalds spin_unlock_irqrestore(&event->device->event_handler_lock, flags); 6531da177e4SLinus Torvalds } 6541da177e4SLinus Torvalds EXPORT_SYMBOL(ib_dispatch_event); 6551da177e4SLinus Torvalds 6561da177e4SLinus Torvalds /** 6571da177e4SLinus Torvalds * ib_query_port - Query IB port attributes 6581da177e4SLinus Torvalds * @device:Device to query 6591da177e4SLinus Torvalds * @port_num:Port number to query 6601da177e4SLinus Torvalds * @port_attr:Port attributes 6611da177e4SLinus Torvalds * 6621da177e4SLinus Torvalds * ib_query_port() returns the attributes of a port through the 6631da177e4SLinus Torvalds * @port_attr pointer. 6641da177e4SLinus Torvalds */ 6651da177e4SLinus Torvalds int ib_query_port(struct ib_device *device, 6661da177e4SLinus Torvalds u8 port_num, 6671da177e4SLinus Torvalds struct ib_port_attr *port_attr) 6681da177e4SLinus Torvalds { 669fad61ad4SEli Cohen union ib_gid gid; 670fad61ad4SEli Cohen int err; 671fad61ad4SEli Cohen 6720cf18d77SIra Weiny if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) 673116c0074SRoland Dreier return -EINVAL; 674116c0074SRoland Dreier 675fad61ad4SEli Cohen memset(port_attr, 0, sizeof(*port_attr)); 676fad61ad4SEli Cohen err = device->query_port(device, port_num, port_attr); 677fad61ad4SEli Cohen if (err || port_attr->subnet_prefix) 678fad61ad4SEli Cohen return err; 679fad61ad4SEli Cohen 680d7012467SEli Cohen if (rdma_port_get_link_layer(device, port_num) != IB_LINK_LAYER_INFINIBAND) 681d7012467SEli Cohen return 0; 682d7012467SEli Cohen 683fad61ad4SEli Cohen err = ib_query_gid(device, port_num, 0, &gid, NULL); 684fad61ad4SEli Cohen if (err) 685fad61ad4SEli Cohen return err; 686fad61ad4SEli Cohen 687fad61ad4SEli Cohen port_attr->subnet_prefix = be64_to_cpu(gid.global.subnet_prefix); 688fad61ad4SEli Cohen return 0; 6891da177e4SLinus Torvalds } 6901da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_port); 6911da177e4SLinus Torvalds 6921da177e4SLinus Torvalds /** 6931da177e4SLinus Torvalds * ib_query_gid - Get GID table entry 6941da177e4SLinus Torvalds * @device:Device to query 6951da177e4SLinus Torvalds * @port_num:Port number to query 6961da177e4SLinus Torvalds * @index:GID table index to query 6971da177e4SLinus Torvalds * @gid:Returned GID 69855ee3ab2SMatan Barak * @attr: Returned GID attributes related to this GID index (only in RoCE). 69955ee3ab2SMatan Barak * NULL means ignore. 7001da177e4SLinus Torvalds * 7011da177e4SLinus Torvalds * ib_query_gid() fetches the specified GID table entry. 7021da177e4SLinus Torvalds */ 7031da177e4SLinus Torvalds int ib_query_gid(struct ib_device *device, 70455ee3ab2SMatan Barak u8 port_num, int index, union ib_gid *gid, 70555ee3ab2SMatan Barak struct ib_gid_attr *attr) 7061da177e4SLinus Torvalds { 70703db3a2dSMatan Barak if (rdma_cap_roce_gid_table(device, port_num)) 70855ee3ab2SMatan Barak return ib_get_cached_gid(device, port_num, index, gid, attr); 70955ee3ab2SMatan Barak 71055ee3ab2SMatan Barak if (attr) 71155ee3ab2SMatan Barak return -EINVAL; 71203db3a2dSMatan Barak 7131da177e4SLinus Torvalds return device->query_gid(device, port_num, index, gid); 7141da177e4SLinus Torvalds } 7151da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_gid); 7161da177e4SLinus Torvalds 7171da177e4SLinus Torvalds /** 71803db3a2dSMatan Barak * ib_enum_roce_netdev - enumerate all RoCE ports 71903db3a2dSMatan Barak * @ib_dev : IB device we want to query 72003db3a2dSMatan Barak * @filter: Should we call the callback? 72103db3a2dSMatan Barak * @filter_cookie: Cookie passed to filter 72203db3a2dSMatan Barak * @cb: Callback to call for each found RoCE ports 72303db3a2dSMatan Barak * @cookie: Cookie passed back to the callback 72403db3a2dSMatan Barak * 72503db3a2dSMatan Barak * Enumerates all of the physical RoCE ports of ib_dev 72603db3a2dSMatan Barak * which are related to netdevice and calls callback() on each 72703db3a2dSMatan Barak * device for which filter() function returns non zero. 72803db3a2dSMatan Barak */ 72903db3a2dSMatan Barak void ib_enum_roce_netdev(struct ib_device *ib_dev, 73003db3a2dSMatan Barak roce_netdev_filter filter, 73103db3a2dSMatan Barak void *filter_cookie, 73203db3a2dSMatan Barak roce_netdev_callback cb, 73303db3a2dSMatan Barak void *cookie) 73403db3a2dSMatan Barak { 73503db3a2dSMatan Barak u8 port; 73603db3a2dSMatan Barak 73703db3a2dSMatan Barak for (port = rdma_start_port(ib_dev); port <= rdma_end_port(ib_dev); 73803db3a2dSMatan Barak port++) 73903db3a2dSMatan Barak if (rdma_protocol_roce(ib_dev, port)) { 74003db3a2dSMatan Barak struct net_device *idev = NULL; 74103db3a2dSMatan Barak 74203db3a2dSMatan Barak if (ib_dev->get_netdev) 74303db3a2dSMatan Barak idev = ib_dev->get_netdev(ib_dev, port); 74403db3a2dSMatan Barak 74503db3a2dSMatan Barak if (idev && 74603db3a2dSMatan Barak idev->reg_state >= NETREG_UNREGISTERED) { 74703db3a2dSMatan Barak dev_put(idev); 74803db3a2dSMatan Barak idev = NULL; 74903db3a2dSMatan Barak } 75003db3a2dSMatan Barak 75103db3a2dSMatan Barak if (filter(ib_dev, port, idev, filter_cookie)) 75203db3a2dSMatan Barak cb(ib_dev, port, idev, cookie); 75303db3a2dSMatan Barak 75403db3a2dSMatan Barak if (idev) 75503db3a2dSMatan Barak dev_put(idev); 75603db3a2dSMatan Barak } 75703db3a2dSMatan Barak } 75803db3a2dSMatan Barak 75903db3a2dSMatan Barak /** 76003db3a2dSMatan Barak * ib_enum_all_roce_netdevs - enumerate all RoCE devices 76103db3a2dSMatan Barak * @filter: Should we call the callback? 76203db3a2dSMatan Barak * @filter_cookie: Cookie passed to filter 76303db3a2dSMatan Barak * @cb: Callback to call for each found RoCE ports 76403db3a2dSMatan Barak * @cookie: Cookie passed back to the callback 76503db3a2dSMatan Barak * 76603db3a2dSMatan Barak * Enumerates all RoCE devices' physical ports which are related 76703db3a2dSMatan Barak * to netdevices and calls callback() on each device for which 76803db3a2dSMatan Barak * filter() function returns non zero. 76903db3a2dSMatan Barak */ 77003db3a2dSMatan Barak void ib_enum_all_roce_netdevs(roce_netdev_filter filter, 77103db3a2dSMatan Barak void *filter_cookie, 77203db3a2dSMatan Barak roce_netdev_callback cb, 77303db3a2dSMatan Barak void *cookie) 77403db3a2dSMatan Barak { 77503db3a2dSMatan Barak struct ib_device *dev; 77603db3a2dSMatan Barak 77703db3a2dSMatan Barak down_read(&lists_rwsem); 77803db3a2dSMatan Barak list_for_each_entry(dev, &device_list, core_list) 77903db3a2dSMatan Barak ib_enum_roce_netdev(dev, filter, filter_cookie, cb, cookie); 78003db3a2dSMatan Barak up_read(&lists_rwsem); 78103db3a2dSMatan Barak } 78203db3a2dSMatan Barak 78303db3a2dSMatan Barak /** 7841da177e4SLinus Torvalds * ib_query_pkey - Get P_Key table entry 7851da177e4SLinus Torvalds * @device:Device to query 7861da177e4SLinus Torvalds * @port_num:Port number to query 7871da177e4SLinus Torvalds * @index:P_Key table index to query 7881da177e4SLinus Torvalds * @pkey:Returned P_Key 7891da177e4SLinus Torvalds * 7901da177e4SLinus Torvalds * ib_query_pkey() fetches the specified P_Key table entry. 7911da177e4SLinus Torvalds */ 7921da177e4SLinus Torvalds int ib_query_pkey(struct ib_device *device, 7931da177e4SLinus Torvalds u8 port_num, u16 index, u16 *pkey) 7941da177e4SLinus Torvalds { 7951da177e4SLinus Torvalds return device->query_pkey(device, port_num, index, pkey); 7961da177e4SLinus Torvalds } 7971da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_pkey); 7981da177e4SLinus Torvalds 7991da177e4SLinus Torvalds /** 8001da177e4SLinus Torvalds * ib_modify_device - Change IB device attributes 8011da177e4SLinus Torvalds * @device:Device to modify 8021da177e4SLinus Torvalds * @device_modify_mask:Mask of attributes to change 8031da177e4SLinus Torvalds * @device_modify:New attribute values 8041da177e4SLinus Torvalds * 8051da177e4SLinus Torvalds * ib_modify_device() changes a device's attributes as specified by 8061da177e4SLinus Torvalds * the @device_modify_mask and @device_modify structure. 8071da177e4SLinus Torvalds */ 8081da177e4SLinus Torvalds int ib_modify_device(struct ib_device *device, 8091da177e4SLinus Torvalds int device_modify_mask, 8101da177e4SLinus Torvalds struct ib_device_modify *device_modify) 8111da177e4SLinus Torvalds { 81210e1b54bSBart Van Assche if (!device->modify_device) 81310e1b54bSBart Van Assche return -ENOSYS; 81410e1b54bSBart Van Assche 8151da177e4SLinus Torvalds return device->modify_device(device, device_modify_mask, 8161da177e4SLinus Torvalds device_modify); 8171da177e4SLinus Torvalds } 8181da177e4SLinus Torvalds EXPORT_SYMBOL(ib_modify_device); 8191da177e4SLinus Torvalds 8201da177e4SLinus Torvalds /** 8211da177e4SLinus Torvalds * ib_modify_port - Modifies the attributes for the specified port. 8221da177e4SLinus Torvalds * @device: The device to modify. 8231da177e4SLinus Torvalds * @port_num: The number of the port to modify. 8241da177e4SLinus Torvalds * @port_modify_mask: Mask used to specify which attributes of the port 8251da177e4SLinus Torvalds * to change. 8261da177e4SLinus Torvalds * @port_modify: New attribute values for the port. 8271da177e4SLinus Torvalds * 8281da177e4SLinus Torvalds * ib_modify_port() changes a port's attributes as specified by the 8291da177e4SLinus Torvalds * @port_modify_mask and @port_modify structure. 8301da177e4SLinus Torvalds */ 8311da177e4SLinus Torvalds int ib_modify_port(struct ib_device *device, 8321da177e4SLinus Torvalds u8 port_num, int port_modify_mask, 8331da177e4SLinus Torvalds struct ib_port_modify *port_modify) 8341da177e4SLinus Torvalds { 83510e1b54bSBart Van Assche if (!device->modify_port) 83610e1b54bSBart Van Assche return -ENOSYS; 83710e1b54bSBart Van Assche 8380cf18d77SIra Weiny if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) 839116c0074SRoland Dreier return -EINVAL; 840116c0074SRoland Dreier 8411da177e4SLinus Torvalds return device->modify_port(device, port_num, port_modify_mask, 8421da177e4SLinus Torvalds port_modify); 8431da177e4SLinus Torvalds } 8441da177e4SLinus Torvalds EXPORT_SYMBOL(ib_modify_port); 8451da177e4SLinus Torvalds 8465eb620c8SYosef Etigin /** 8475eb620c8SYosef Etigin * ib_find_gid - Returns the port number and GID table index where 8485eb620c8SYosef Etigin * a specified GID value occurs. 8495eb620c8SYosef Etigin * @device: The device to query. 8505eb620c8SYosef Etigin * @gid: The GID value to search for. 851b39ffa1dSMatan Barak * @gid_type: Type of GID. 85255ee3ab2SMatan Barak * @ndev: The ndev related to the GID to search for. 8535eb620c8SYosef Etigin * @port_num: The port number of the device where the GID value was found. 8545eb620c8SYosef Etigin * @index: The index into the GID table where the GID was found. This 8555eb620c8SYosef Etigin * parameter may be NULL. 8565eb620c8SYosef Etigin */ 8575eb620c8SYosef Etigin int ib_find_gid(struct ib_device *device, union ib_gid *gid, 858b39ffa1dSMatan Barak enum ib_gid_type gid_type, struct net_device *ndev, 859b39ffa1dSMatan Barak u8 *port_num, u16 *index) 8605eb620c8SYosef Etigin { 8615eb620c8SYosef Etigin union ib_gid tmp_gid; 8625eb620c8SYosef Etigin int ret, port, i; 8635eb620c8SYosef Etigin 8640cf18d77SIra Weiny for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) { 86503db3a2dSMatan Barak if (rdma_cap_roce_gid_table(device, port)) { 866b39ffa1dSMatan Barak if (!ib_find_cached_gid_by_port(device, gid, gid_type, port, 86755ee3ab2SMatan Barak ndev, index)) { 86803db3a2dSMatan Barak *port_num = port; 86903db3a2dSMatan Barak return 0; 87003db3a2dSMatan Barak } 87198d25afaSDan Carpenter } 87203db3a2dSMatan Barak 873b39ffa1dSMatan Barak if (gid_type != IB_GID_TYPE_IB) 874b39ffa1dSMatan Barak continue; 875b39ffa1dSMatan Barak 8767738613eSIra Weiny for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) { 87755ee3ab2SMatan Barak ret = ib_query_gid(device, port, i, &tmp_gid, NULL); 8785eb620c8SYosef Etigin if (ret) 8795eb620c8SYosef Etigin return ret; 8805eb620c8SYosef Etigin if (!memcmp(&tmp_gid, gid, sizeof *gid)) { 8815eb620c8SYosef Etigin *port_num = port; 8825eb620c8SYosef Etigin if (index) 8835eb620c8SYosef Etigin *index = i; 8845eb620c8SYosef Etigin return 0; 8855eb620c8SYosef Etigin } 8865eb620c8SYosef Etigin } 8875eb620c8SYosef Etigin } 8885eb620c8SYosef Etigin 8895eb620c8SYosef Etigin return -ENOENT; 8905eb620c8SYosef Etigin } 8915eb620c8SYosef Etigin EXPORT_SYMBOL(ib_find_gid); 8925eb620c8SYosef Etigin 8935eb620c8SYosef Etigin /** 8945eb620c8SYosef Etigin * ib_find_pkey - Returns the PKey table index where a specified 8955eb620c8SYosef Etigin * PKey value occurs. 8965eb620c8SYosef Etigin * @device: The device to query. 8975eb620c8SYosef Etigin * @port_num: The port number of the device to search for the PKey. 8985eb620c8SYosef Etigin * @pkey: The PKey value to search for. 8995eb620c8SYosef Etigin * @index: The index into the PKey table where the PKey was found. 9005eb620c8SYosef Etigin */ 9015eb620c8SYosef Etigin int ib_find_pkey(struct ib_device *device, 9025eb620c8SYosef Etigin u8 port_num, u16 pkey, u16 *index) 9035eb620c8SYosef Etigin { 9045eb620c8SYosef Etigin int ret, i; 9055eb620c8SYosef Etigin u16 tmp_pkey; 906ff7166c4SJack Morgenstein int partial_ix = -1; 9075eb620c8SYosef Etigin 9087738613eSIra Weiny for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) { 9095eb620c8SYosef Etigin ret = ib_query_pkey(device, port_num, i, &tmp_pkey); 9105eb620c8SYosef Etigin if (ret) 9115eb620c8SYosef Etigin return ret; 91236026eccSMoni Shoua if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) { 913ff7166c4SJack Morgenstein /* if there is full-member pkey take it.*/ 914ff7166c4SJack Morgenstein if (tmp_pkey & 0x8000) { 9155eb620c8SYosef Etigin *index = i; 9165eb620c8SYosef Etigin return 0; 9175eb620c8SYosef Etigin } 918ff7166c4SJack Morgenstein if (partial_ix < 0) 919ff7166c4SJack Morgenstein partial_ix = i; 920ff7166c4SJack Morgenstein } 9215eb620c8SYosef Etigin } 9225eb620c8SYosef Etigin 923ff7166c4SJack Morgenstein /*no full-member, if exists take the limited*/ 924ff7166c4SJack Morgenstein if (partial_ix >= 0) { 925ff7166c4SJack Morgenstein *index = partial_ix; 926ff7166c4SJack Morgenstein return 0; 927ff7166c4SJack Morgenstein } 9285eb620c8SYosef Etigin return -ENOENT; 9295eb620c8SYosef Etigin } 9305eb620c8SYosef Etigin EXPORT_SYMBOL(ib_find_pkey); 9315eb620c8SYosef Etigin 9329268f72dSYotam Kenneth /** 9339268f72dSYotam Kenneth * ib_get_net_dev_by_params() - Return the appropriate net_dev 9349268f72dSYotam Kenneth * for a received CM request 9359268f72dSYotam Kenneth * @dev: An RDMA device on which the request has been received. 9369268f72dSYotam Kenneth * @port: Port number on the RDMA device. 9379268f72dSYotam Kenneth * @pkey: The Pkey the request came on. 9389268f72dSYotam Kenneth * @gid: A GID that the net_dev uses to communicate. 9399268f72dSYotam Kenneth * @addr: Contains the IP address that the request specified as its 9409268f72dSYotam Kenneth * destination. 9419268f72dSYotam Kenneth */ 9429268f72dSYotam Kenneth struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, 9439268f72dSYotam Kenneth u8 port, 9449268f72dSYotam Kenneth u16 pkey, 9459268f72dSYotam Kenneth const union ib_gid *gid, 9469268f72dSYotam Kenneth const struct sockaddr *addr) 9479268f72dSYotam Kenneth { 9489268f72dSYotam Kenneth struct net_device *net_dev = NULL; 9499268f72dSYotam Kenneth struct ib_client_data *context; 9509268f72dSYotam Kenneth 9519268f72dSYotam Kenneth if (!rdma_protocol_ib(dev, port)) 9529268f72dSYotam Kenneth return NULL; 9539268f72dSYotam Kenneth 9549268f72dSYotam Kenneth down_read(&lists_rwsem); 9559268f72dSYotam Kenneth 9569268f72dSYotam Kenneth list_for_each_entry(context, &dev->client_data_list, list) { 9579268f72dSYotam Kenneth struct ib_client *client = context->client; 9589268f72dSYotam Kenneth 9599268f72dSYotam Kenneth if (context->going_down) 9609268f72dSYotam Kenneth continue; 9619268f72dSYotam Kenneth 9629268f72dSYotam Kenneth if (client->get_net_dev_by_params) { 9639268f72dSYotam Kenneth net_dev = client->get_net_dev_by_params(dev, port, pkey, 9649268f72dSYotam Kenneth gid, addr, 9659268f72dSYotam Kenneth context->data); 9669268f72dSYotam Kenneth if (net_dev) 9679268f72dSYotam Kenneth break; 9689268f72dSYotam Kenneth } 9699268f72dSYotam Kenneth } 9709268f72dSYotam Kenneth 9719268f72dSYotam Kenneth up_read(&lists_rwsem); 9729268f72dSYotam Kenneth 9739268f72dSYotam Kenneth return net_dev; 9749268f72dSYotam Kenneth } 9759268f72dSYotam Kenneth EXPORT_SYMBOL(ib_get_net_dev_by_params); 9769268f72dSYotam Kenneth 977735c631aSMark Bloch static struct ibnl_client_cbs ibnl_ls_cb_table[] = { 978735c631aSMark Bloch [RDMA_NL_LS_OP_RESOLVE] = { 979735c631aSMark Bloch .dump = ib_nl_handle_resolve_resp, 980735c631aSMark Bloch .module = THIS_MODULE }, 981735c631aSMark Bloch [RDMA_NL_LS_OP_SET_TIMEOUT] = { 982735c631aSMark Bloch .dump = ib_nl_handle_set_timeout, 983735c631aSMark Bloch .module = THIS_MODULE }, 984ae43f828SMark Bloch [RDMA_NL_LS_OP_IP_RESOLVE] = { 985ae43f828SMark Bloch .dump = ib_nl_handle_ip_res_resp, 986ae43f828SMark Bloch .module = THIS_MODULE }, 987735c631aSMark Bloch }; 988735c631aSMark Bloch 989735c631aSMark Bloch static int ib_add_ibnl_clients(void) 990735c631aSMark Bloch { 991735c631aSMark Bloch return ibnl_add_client(RDMA_NL_LS, ARRAY_SIZE(ibnl_ls_cb_table), 992735c631aSMark Bloch ibnl_ls_cb_table); 993735c631aSMark Bloch } 994735c631aSMark Bloch 995735c631aSMark Bloch static void ib_remove_ibnl_clients(void) 996735c631aSMark Bloch { 997735c631aSMark Bloch ibnl_remove_client(RDMA_NL_LS); 998735c631aSMark Bloch } 999735c631aSMark Bloch 10001da177e4SLinus Torvalds static int __init ib_core_init(void) 10011da177e4SLinus Torvalds { 10021da177e4SLinus Torvalds int ret; 10031da177e4SLinus Torvalds 1004f0626710STejun Heo ib_wq = alloc_workqueue("infiniband", 0, 0); 1005f0626710STejun Heo if (!ib_wq) 1006f0626710STejun Heo return -ENOMEM; 1007f0626710STejun Heo 100814d3a3b2SChristoph Hellwig ib_comp_wq = alloc_workqueue("ib-comp-wq", 100914d3a3b2SChristoph Hellwig WQ_UNBOUND | WQ_HIGHPRI | WQ_MEM_RECLAIM, 101014d3a3b2SChristoph Hellwig WQ_UNBOUND_MAX_ACTIVE); 101114d3a3b2SChristoph Hellwig if (!ib_comp_wq) { 101214d3a3b2SChristoph Hellwig ret = -ENOMEM; 101314d3a3b2SChristoph Hellwig goto err; 101414d3a3b2SChristoph Hellwig } 101514d3a3b2SChristoph Hellwig 101655aeed06SJason Gunthorpe ret = class_register(&ib_class); 1017fd75c789SNir Muchtar if (ret) { 1018aba25a3eSParav Pandit pr_warn("Couldn't create InfiniBand device class\n"); 101914d3a3b2SChristoph Hellwig goto err_comp; 1020fd75c789SNir Muchtar } 10211da177e4SLinus Torvalds 1022b2cbae2cSRoland Dreier ret = ibnl_init(); 10231da177e4SLinus Torvalds if (ret) { 1024aba25a3eSParav Pandit pr_warn("Couldn't init IB netlink interface\n"); 1025fd75c789SNir Muchtar goto err_sysfs; 10261da177e4SLinus Torvalds } 10271da177e4SLinus Torvalds 1028e3f20f02SLeon Romanovsky ret = addr_init(); 1029e3f20f02SLeon Romanovsky if (ret) { 1030e3f20f02SLeon Romanovsky pr_warn("Could't init IB address resolution\n"); 1031e3f20f02SLeon Romanovsky goto err_ibnl; 1032e3f20f02SLeon Romanovsky } 1033e3f20f02SLeon Romanovsky 10344c2cb422SMark Bloch ret = ib_mad_init(); 10354c2cb422SMark Bloch if (ret) { 10364c2cb422SMark Bloch pr_warn("Couldn't init IB MAD\n"); 10374c2cb422SMark Bloch goto err_addr; 10384c2cb422SMark Bloch } 10394c2cb422SMark Bloch 1040c2e49c92SMark Bloch ret = ib_sa_init(); 1041c2e49c92SMark Bloch if (ret) { 1042c2e49c92SMark Bloch pr_warn("Couldn't init SA\n"); 1043c2e49c92SMark Bloch goto err_mad; 1044c2e49c92SMark Bloch } 1045c2e49c92SMark Bloch 1046da1f857bSDan Carpenter ret = ib_add_ibnl_clients(); 1047da1f857bSDan Carpenter if (ret) { 1048735c631aSMark Bloch pr_warn("Couldn't register ibnl clients\n"); 1049735c631aSMark Bloch goto err_sa; 1050735c631aSMark Bloch } 1051735c631aSMark Bloch 105203db3a2dSMatan Barak ib_cache_setup(); 1053b2cbae2cSRoland Dreier 1054fd75c789SNir Muchtar return 0; 1055fd75c789SNir Muchtar 1056735c631aSMark Bloch err_sa: 1057735c631aSMark Bloch ib_sa_cleanup(); 1058c2e49c92SMark Bloch err_mad: 1059c2e49c92SMark Bloch ib_mad_cleanup(); 10604c2cb422SMark Bloch err_addr: 10614c2cb422SMark Bloch addr_cleanup(); 1062e3f20f02SLeon Romanovsky err_ibnl: 1063e3f20f02SLeon Romanovsky ibnl_cleanup(); 1064fd75c789SNir Muchtar err_sysfs: 106555aeed06SJason Gunthorpe class_unregister(&ib_class); 106614d3a3b2SChristoph Hellwig err_comp: 106714d3a3b2SChristoph Hellwig destroy_workqueue(ib_comp_wq); 1068fd75c789SNir Muchtar err: 1069fd75c789SNir Muchtar destroy_workqueue(ib_wq); 10701da177e4SLinus Torvalds return ret; 10711da177e4SLinus Torvalds } 10721da177e4SLinus Torvalds 10731da177e4SLinus Torvalds static void __exit ib_core_cleanup(void) 10741da177e4SLinus Torvalds { 10751da177e4SLinus Torvalds ib_cache_cleanup(); 1076735c631aSMark Bloch ib_remove_ibnl_clients(); 1077c2e49c92SMark Bloch ib_sa_cleanup(); 10784c2cb422SMark Bloch ib_mad_cleanup(); 1079e3f20f02SLeon Romanovsky addr_cleanup(); 1080b2cbae2cSRoland Dreier ibnl_cleanup(); 108155aeed06SJason Gunthorpe class_unregister(&ib_class); 108214d3a3b2SChristoph Hellwig destroy_workqueue(ib_comp_wq); 1083f7c6a7b5SRoland Dreier /* Make sure that any pending umem accounting work is done. */ 1084f0626710STejun Heo destroy_workqueue(ib_wq); 10851da177e4SLinus Torvalds } 10861da177e4SLinus Torvalds 10871da177e4SLinus Torvalds module_init(ib_core_init); 10881da177e4SLinus Torvalds module_exit(ib_core_cleanup); 1089