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); 2571da177e4SLinus Torvalds if (!context) { 258aba25a3eSParav Pandit pr_warn("Couldn't allocate client context for %s/%s\n", 2591da177e4SLinus Torvalds device->name, client->name); 2601da177e4SLinus Torvalds return -ENOMEM; 2611da177e4SLinus Torvalds } 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds context->client = client; 2641da177e4SLinus Torvalds context->data = NULL; 2657c1eb45aSHaggai Eran context->going_down = false; 2661da177e4SLinus Torvalds 2677c1eb45aSHaggai Eran down_write(&lists_rwsem); 2681da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 2691da177e4SLinus Torvalds list_add(&context->list, &device->client_data_list); 2701da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 2717c1eb45aSHaggai Eran up_write(&lists_rwsem); 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds return 0; 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds 276337877a4SIra Weiny static int verify_immutable(const struct ib_device *dev, u8 port) 277337877a4SIra Weiny { 278337877a4SIra Weiny return WARN_ON(!rdma_cap_ib_mad(dev, port) && 279337877a4SIra Weiny rdma_max_mad_size(dev, port) != 0); 280337877a4SIra Weiny } 281337877a4SIra Weiny 2827738613eSIra Weiny static int read_port_immutable(struct ib_device *device) 2835eb620c8SYosef Etigin { 28455aeed06SJason Gunthorpe int ret; 2857738613eSIra Weiny u8 start_port = rdma_start_port(device); 2867738613eSIra Weiny u8 end_port = rdma_end_port(device); 2877738613eSIra Weiny u8 port; 2885eb620c8SYosef Etigin 2897738613eSIra Weiny /** 2907738613eSIra Weiny * device->port_immutable is indexed directly by the port number to make 2917738613eSIra Weiny * access to this data as efficient as possible. 2927738613eSIra Weiny * 2937738613eSIra Weiny * Therefore port_immutable is declared as a 1 based array with 2947738613eSIra Weiny * potential empty slots at the beginning. 2957738613eSIra Weiny */ 2967738613eSIra Weiny device->port_immutable = kzalloc(sizeof(*device->port_immutable) 2977738613eSIra Weiny * (end_port + 1), 2985eb620c8SYosef Etigin GFP_KERNEL); 2997738613eSIra Weiny if (!device->port_immutable) 30055aeed06SJason Gunthorpe return -ENOMEM; 3015eb620c8SYosef Etigin 3027738613eSIra Weiny for (port = start_port; port <= end_port; ++port) { 3037738613eSIra Weiny ret = device->get_port_immutable(device, port, 3047738613eSIra Weiny &device->port_immutable[port]); 3055eb620c8SYosef Etigin if (ret) 3065eb620c8SYosef Etigin return ret; 30755aeed06SJason Gunthorpe 30855aeed06SJason Gunthorpe if (verify_immutable(device, port)) 30955aeed06SJason Gunthorpe return -EINVAL; 31055aeed06SJason Gunthorpe } 31155aeed06SJason Gunthorpe return 0; 3125eb620c8SYosef Etigin } 3135eb620c8SYosef Etigin 3145fa76c20SIra Weiny void ib_get_device_fw_str(struct ib_device *dev, char *str, size_t str_len) 3155fa76c20SIra Weiny { 3165fa76c20SIra Weiny if (dev->get_dev_fw_str) 3175fa76c20SIra Weiny dev->get_dev_fw_str(dev, str, str_len); 3185fa76c20SIra Weiny else 3195fa76c20SIra Weiny str[0] = '\0'; 3205fa76c20SIra Weiny } 3215fa76c20SIra Weiny EXPORT_SYMBOL(ib_get_device_fw_str); 3225fa76c20SIra Weiny 3231da177e4SLinus Torvalds /** 3241da177e4SLinus Torvalds * ib_register_device - Register an IB device with IB core 3251da177e4SLinus Torvalds * @device:Device to register 3261da177e4SLinus Torvalds * 3271da177e4SLinus Torvalds * Low-level drivers use ib_register_device() to register their 3281da177e4SLinus Torvalds * devices with the IB core. All registered clients will receive a 3291da177e4SLinus Torvalds * callback for each device that is added. @device must be allocated 3301da177e4SLinus Torvalds * with ib_alloc_device(). 3311da177e4SLinus Torvalds */ 3329a6edb60SRalph Campbell int ib_register_device(struct ib_device *device, 3339a6edb60SRalph Campbell int (*port_callback)(struct ib_device *, 3349a6edb60SRalph Campbell u8, struct kobject *)) 3351da177e4SLinus Torvalds { 3361da177e4SLinus Torvalds int ret; 337b8071ad8SDoug Ledford struct ib_client *client; 3383e153a93SIra Weiny struct ib_udata uhw = {.outlen = 0, .inlen = 0}; 3391da177e4SLinus Torvalds 34095ed644fSIngo Molnar mutex_lock(&device_mutex); 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds if (strchr(device->name, '%')) { 3431da177e4SLinus Torvalds ret = alloc_name(device->name); 3441da177e4SLinus Torvalds if (ret) 3451da177e4SLinus Torvalds goto out; 3461da177e4SLinus Torvalds } 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds if (ib_device_check_mandatory(device)) { 3491da177e4SLinus Torvalds ret = -EINVAL; 3501da177e4SLinus Torvalds goto out; 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds 3537738613eSIra Weiny ret = read_port_immutable(device); 3545eb620c8SYosef Etigin if (ret) { 355aba25a3eSParav Pandit pr_warn("Couldn't create per port immutable data %s\n", 3565eb620c8SYosef Etigin device->name); 3575eb620c8SYosef Etigin goto out; 3585eb620c8SYosef Etigin } 3595eb620c8SYosef Etigin 36003db3a2dSMatan Barak ret = ib_cache_setup_one(device); 36103db3a2dSMatan Barak if (ret) { 362aba25a3eSParav Pandit pr_warn("Couldn't set up InfiniBand P_Key/GID cache\n"); 36303db3a2dSMatan Barak goto out; 36403db3a2dSMatan Barak } 36503db3a2dSMatan Barak 3663e153a93SIra Weiny memset(&device->attrs, 0, sizeof(device->attrs)); 3673e153a93SIra Weiny ret = device->query_device(device, &device->attrs, &uhw); 3683e153a93SIra Weiny if (ret) { 369aba25a3eSParav Pandit pr_warn("Couldn't query the device attributes\n"); 3705adebafbSLeon Romanovsky ib_cache_cleanup_one(device); 3713e153a93SIra Weiny goto out; 3723e153a93SIra Weiny } 3733e153a93SIra Weiny 3749a6edb60SRalph Campbell ret = ib_device_register_sysfs(device, port_callback); 3751da177e4SLinus Torvalds if (ret) { 376aba25a3eSParav Pandit pr_warn("Couldn't register device %s with driver model\n", 3771da177e4SLinus Torvalds device->name); 37803db3a2dSMatan Barak ib_cache_cleanup_one(device); 3791da177e4SLinus Torvalds goto out; 3801da177e4SLinus Torvalds } 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds device->reg_state = IB_DEV_REGISTERED; 3831da177e4SLinus Torvalds 3841da177e4SLinus Torvalds list_for_each_entry(client, &client_list, list) 3851da177e4SLinus Torvalds if (client->add && !add_client_context(device, client)) 3861da177e4SLinus Torvalds client->add(device); 3871da177e4SLinus Torvalds 3885aa44bb9SHaggai Eran down_write(&lists_rwsem); 3895aa44bb9SHaggai Eran list_add_tail(&device->core_list, &device_list); 3905aa44bb9SHaggai Eran up_write(&lists_rwsem); 3911da177e4SLinus Torvalds out: 39295ed644fSIngo Molnar mutex_unlock(&device_mutex); 3931da177e4SLinus Torvalds return ret; 3941da177e4SLinus Torvalds } 3951da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_device); 3961da177e4SLinus Torvalds 3971da177e4SLinus Torvalds /** 3981da177e4SLinus Torvalds * ib_unregister_device - Unregister an IB device 3991da177e4SLinus Torvalds * @device:Device to unregister 4001da177e4SLinus Torvalds * 4011da177e4SLinus Torvalds * Unregister an IB device. All clients will receive a remove callback. 4021da177e4SLinus Torvalds */ 4031da177e4SLinus Torvalds void ib_unregister_device(struct ib_device *device) 4041da177e4SLinus Torvalds { 4051da177e4SLinus Torvalds struct ib_client_data *context, *tmp; 4061da177e4SLinus Torvalds unsigned long flags; 4071da177e4SLinus Torvalds 40895ed644fSIngo Molnar mutex_lock(&device_mutex); 4091da177e4SLinus Torvalds 4105aa44bb9SHaggai Eran down_write(&lists_rwsem); 4115aa44bb9SHaggai Eran list_del(&device->core_list); 4127c1eb45aSHaggai Eran spin_lock_irqsave(&device->client_data_lock, flags); 4137c1eb45aSHaggai Eran list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 4147c1eb45aSHaggai Eran context->going_down = true; 4157c1eb45aSHaggai Eran spin_unlock_irqrestore(&device->client_data_lock, flags); 4167c1eb45aSHaggai Eran downgrade_write(&lists_rwsem); 4175aa44bb9SHaggai Eran 4187c1eb45aSHaggai Eran list_for_each_entry_safe(context, tmp, &device->client_data_list, 4197c1eb45aSHaggai Eran list) { 4207c1eb45aSHaggai Eran if (context->client->remove) 4217c1eb45aSHaggai Eran context->client->remove(device, context->data); 4227c1eb45aSHaggai Eran } 4237c1eb45aSHaggai Eran up_read(&lists_rwsem); 4241da177e4SLinus Torvalds 42595ed644fSIngo Molnar mutex_unlock(&device_mutex); 4261da177e4SLinus Torvalds 4279206dff1SRoland Dreier ib_device_unregister_sysfs(device); 42803db3a2dSMatan Barak ib_cache_cleanup_one(device); 4299206dff1SRoland Dreier 4307c1eb45aSHaggai Eran down_write(&lists_rwsem); 4311da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 4321da177e4SLinus Torvalds list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 4331da177e4SLinus Torvalds kfree(context); 4341da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 4357c1eb45aSHaggai Eran up_write(&lists_rwsem); 4361da177e4SLinus Torvalds 4371da177e4SLinus Torvalds device->reg_state = IB_DEV_UNREGISTERED; 4381da177e4SLinus Torvalds } 4391da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_device); 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds /** 4421da177e4SLinus Torvalds * ib_register_client - Register an IB client 4431da177e4SLinus Torvalds * @client:Client to register 4441da177e4SLinus Torvalds * 4451da177e4SLinus Torvalds * Upper level users of the IB drivers can use ib_register_client() to 4461da177e4SLinus Torvalds * register callbacks for IB device addition and removal. When an IB 4471da177e4SLinus Torvalds * device is added, each registered client's add method will be called 4481da177e4SLinus Torvalds * (in the order the clients were registered), and when a device is 4491da177e4SLinus Torvalds * removed, each client's remove method will be called (in the reverse 4501da177e4SLinus Torvalds * order that clients were registered). In addition, when 4511da177e4SLinus Torvalds * ib_register_client() is called, the client will receive an add 4521da177e4SLinus Torvalds * callback for all devices already registered. 4531da177e4SLinus Torvalds */ 4541da177e4SLinus Torvalds int ib_register_client(struct ib_client *client) 4551da177e4SLinus Torvalds { 4561da177e4SLinus Torvalds struct ib_device *device; 4571da177e4SLinus Torvalds 45895ed644fSIngo Molnar mutex_lock(&device_mutex); 4591da177e4SLinus Torvalds 4601da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) 4611da177e4SLinus Torvalds if (client->add && !add_client_context(device, client)) 4621da177e4SLinus Torvalds client->add(device); 4631da177e4SLinus Torvalds 4645aa44bb9SHaggai Eran down_write(&lists_rwsem); 4655aa44bb9SHaggai Eran list_add_tail(&client->list, &client_list); 4665aa44bb9SHaggai Eran up_write(&lists_rwsem); 4675aa44bb9SHaggai Eran 46895ed644fSIngo Molnar mutex_unlock(&device_mutex); 4691da177e4SLinus Torvalds 4701da177e4SLinus Torvalds return 0; 4711da177e4SLinus Torvalds } 4721da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_client); 4731da177e4SLinus Torvalds 4741da177e4SLinus Torvalds /** 4751da177e4SLinus Torvalds * ib_unregister_client - Unregister an IB client 4761da177e4SLinus Torvalds * @client:Client to unregister 4771da177e4SLinus Torvalds * 4781da177e4SLinus Torvalds * Upper level users use ib_unregister_client() to remove their client 4791da177e4SLinus Torvalds * registration. When ib_unregister_client() is called, the client 4801da177e4SLinus Torvalds * will receive a remove callback for each IB device still registered. 4811da177e4SLinus Torvalds */ 4821da177e4SLinus Torvalds void ib_unregister_client(struct ib_client *client) 4831da177e4SLinus Torvalds { 4841da177e4SLinus Torvalds struct ib_client_data *context, *tmp; 4851da177e4SLinus Torvalds struct ib_device *device; 4861da177e4SLinus Torvalds unsigned long flags; 4871da177e4SLinus Torvalds 48895ed644fSIngo Molnar mutex_lock(&device_mutex); 4891da177e4SLinus Torvalds 4905aa44bb9SHaggai Eran down_write(&lists_rwsem); 4915aa44bb9SHaggai Eran list_del(&client->list); 4925aa44bb9SHaggai Eran up_write(&lists_rwsem); 4935aa44bb9SHaggai Eran 4941da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) { 4957c1eb45aSHaggai Eran struct ib_client_data *found_context = NULL; 4961da177e4SLinus Torvalds 4977c1eb45aSHaggai Eran down_write(&lists_rwsem); 4981da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 4991da177e4SLinus Torvalds list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 5001da177e4SLinus Torvalds if (context->client == client) { 5017c1eb45aSHaggai Eran context->going_down = true; 5027c1eb45aSHaggai Eran found_context = context; 5037c1eb45aSHaggai Eran break; 5041da177e4SLinus Torvalds } 5051da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 5067c1eb45aSHaggai Eran up_write(&lists_rwsem); 5077c1eb45aSHaggai Eran 5087c1eb45aSHaggai Eran if (client->remove) 5097c1eb45aSHaggai Eran client->remove(device, found_context ? 5107c1eb45aSHaggai Eran found_context->data : NULL); 5117c1eb45aSHaggai Eran 5127c1eb45aSHaggai Eran if (!found_context) { 5137c1eb45aSHaggai Eran pr_warn("No client context found for %s/%s\n", 5147c1eb45aSHaggai Eran device->name, client->name); 5157c1eb45aSHaggai Eran continue; 5167c1eb45aSHaggai Eran } 5177c1eb45aSHaggai Eran 5187c1eb45aSHaggai Eran down_write(&lists_rwsem); 5197c1eb45aSHaggai Eran spin_lock_irqsave(&device->client_data_lock, flags); 5207c1eb45aSHaggai Eran list_del(&found_context->list); 5217c1eb45aSHaggai Eran kfree(found_context); 5227c1eb45aSHaggai Eran spin_unlock_irqrestore(&device->client_data_lock, flags); 5237c1eb45aSHaggai Eran up_write(&lists_rwsem); 5241da177e4SLinus Torvalds } 5251da177e4SLinus Torvalds 52695ed644fSIngo Molnar mutex_unlock(&device_mutex); 5271da177e4SLinus Torvalds } 5281da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_client); 5291da177e4SLinus Torvalds 5301da177e4SLinus Torvalds /** 5311da177e4SLinus Torvalds * ib_get_client_data - Get IB client context 5321da177e4SLinus Torvalds * @device:Device to get context for 5331da177e4SLinus Torvalds * @client:Client to get context for 5341da177e4SLinus Torvalds * 5351da177e4SLinus Torvalds * ib_get_client_data() returns client context set with 5361da177e4SLinus Torvalds * ib_set_client_data(). 5371da177e4SLinus Torvalds */ 5381da177e4SLinus Torvalds void *ib_get_client_data(struct ib_device *device, struct ib_client *client) 5391da177e4SLinus Torvalds { 5401da177e4SLinus Torvalds struct ib_client_data *context; 5411da177e4SLinus Torvalds void *ret = NULL; 5421da177e4SLinus Torvalds unsigned long flags; 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 5451da177e4SLinus Torvalds list_for_each_entry(context, &device->client_data_list, list) 5461da177e4SLinus Torvalds if (context->client == client) { 5471da177e4SLinus Torvalds ret = context->data; 5481da177e4SLinus Torvalds break; 5491da177e4SLinus Torvalds } 5501da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds return ret; 5531da177e4SLinus Torvalds } 5541da177e4SLinus Torvalds EXPORT_SYMBOL(ib_get_client_data); 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds /** 5579cd330d3SKrishna Kumar * ib_set_client_data - Set IB client context 5581da177e4SLinus Torvalds * @device:Device to set context for 5591da177e4SLinus Torvalds * @client:Client to set context for 5601da177e4SLinus Torvalds * @data:Context to set 5611da177e4SLinus Torvalds * 5621da177e4SLinus Torvalds * ib_set_client_data() sets client context that can be retrieved with 5631da177e4SLinus Torvalds * ib_get_client_data(). 5641da177e4SLinus Torvalds */ 5651da177e4SLinus Torvalds void ib_set_client_data(struct ib_device *device, struct ib_client *client, 5661da177e4SLinus Torvalds void *data) 5671da177e4SLinus Torvalds { 5681da177e4SLinus Torvalds struct ib_client_data *context; 5691da177e4SLinus Torvalds unsigned long flags; 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 5721da177e4SLinus Torvalds list_for_each_entry(context, &device->client_data_list, list) 5731da177e4SLinus Torvalds if (context->client == client) { 5741da177e4SLinus Torvalds context->data = data; 5751da177e4SLinus Torvalds goto out; 5761da177e4SLinus Torvalds } 5771da177e4SLinus Torvalds 578aba25a3eSParav Pandit pr_warn("No client context found for %s/%s\n", 5791da177e4SLinus Torvalds device->name, client->name); 5801da177e4SLinus Torvalds 5811da177e4SLinus Torvalds out: 5821da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 5831da177e4SLinus Torvalds } 5841da177e4SLinus Torvalds EXPORT_SYMBOL(ib_set_client_data); 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds /** 5871da177e4SLinus Torvalds * ib_register_event_handler - Register an IB event handler 5881da177e4SLinus Torvalds * @event_handler:Handler to register 5891da177e4SLinus Torvalds * 5901da177e4SLinus Torvalds * ib_register_event_handler() registers an event handler that will be 5911da177e4SLinus Torvalds * called back when asynchronous IB events occur (as defined in 5921da177e4SLinus Torvalds * chapter 11 of the InfiniBand Architecture Specification). This 5931da177e4SLinus Torvalds * callback may occur in interrupt context. 5941da177e4SLinus Torvalds */ 5951da177e4SLinus Torvalds int ib_register_event_handler (struct ib_event_handler *event_handler) 5961da177e4SLinus Torvalds { 5971da177e4SLinus Torvalds unsigned long flags; 5981da177e4SLinus Torvalds 5991da177e4SLinus Torvalds spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); 6001da177e4SLinus Torvalds list_add_tail(&event_handler->list, 6011da177e4SLinus Torvalds &event_handler->device->event_handler_list); 6021da177e4SLinus Torvalds spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); 6031da177e4SLinus Torvalds 6041da177e4SLinus Torvalds return 0; 6051da177e4SLinus Torvalds } 6061da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_event_handler); 6071da177e4SLinus Torvalds 6081da177e4SLinus Torvalds /** 6091da177e4SLinus Torvalds * ib_unregister_event_handler - Unregister an event handler 6101da177e4SLinus Torvalds * @event_handler:Handler to unregister 6111da177e4SLinus Torvalds * 6121da177e4SLinus Torvalds * Unregister an event handler registered with 6131da177e4SLinus Torvalds * ib_register_event_handler(). 6141da177e4SLinus Torvalds */ 6151da177e4SLinus Torvalds int ib_unregister_event_handler(struct ib_event_handler *event_handler) 6161da177e4SLinus Torvalds { 6171da177e4SLinus Torvalds unsigned long flags; 6181da177e4SLinus Torvalds 6191da177e4SLinus Torvalds spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); 6201da177e4SLinus Torvalds list_del(&event_handler->list); 6211da177e4SLinus Torvalds spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); 6221da177e4SLinus Torvalds 6231da177e4SLinus Torvalds return 0; 6241da177e4SLinus Torvalds } 6251da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_event_handler); 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds /** 6281da177e4SLinus Torvalds * ib_dispatch_event - Dispatch an asynchronous event 6291da177e4SLinus Torvalds * @event:Event to dispatch 6301da177e4SLinus Torvalds * 6311da177e4SLinus Torvalds * Low-level drivers must call ib_dispatch_event() to dispatch the 6321da177e4SLinus Torvalds * event to all registered event handlers when an asynchronous event 6331da177e4SLinus Torvalds * occurs. 6341da177e4SLinus Torvalds */ 6351da177e4SLinus Torvalds void ib_dispatch_event(struct ib_event *event) 6361da177e4SLinus Torvalds { 6371da177e4SLinus Torvalds unsigned long flags; 6381da177e4SLinus Torvalds struct ib_event_handler *handler; 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds spin_lock_irqsave(&event->device->event_handler_lock, flags); 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds list_for_each_entry(handler, &event->device->event_handler_list, list) 6431da177e4SLinus Torvalds handler->handler(handler, event); 6441da177e4SLinus Torvalds 6451da177e4SLinus Torvalds spin_unlock_irqrestore(&event->device->event_handler_lock, flags); 6461da177e4SLinus Torvalds } 6471da177e4SLinus Torvalds EXPORT_SYMBOL(ib_dispatch_event); 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds /** 6501da177e4SLinus Torvalds * ib_query_port - Query IB port attributes 6511da177e4SLinus Torvalds * @device:Device to query 6521da177e4SLinus Torvalds * @port_num:Port number to query 6531da177e4SLinus Torvalds * @port_attr:Port attributes 6541da177e4SLinus Torvalds * 6551da177e4SLinus Torvalds * ib_query_port() returns the attributes of a port through the 6561da177e4SLinus Torvalds * @port_attr pointer. 6571da177e4SLinus Torvalds */ 6581da177e4SLinus Torvalds int ib_query_port(struct ib_device *device, 6591da177e4SLinus Torvalds u8 port_num, 6601da177e4SLinus Torvalds struct ib_port_attr *port_attr) 6611da177e4SLinus Torvalds { 662fad61ad4SEli Cohen union ib_gid gid; 663fad61ad4SEli Cohen int err; 664fad61ad4SEli Cohen 6650cf18d77SIra Weiny if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) 666116c0074SRoland Dreier return -EINVAL; 667116c0074SRoland Dreier 668fad61ad4SEli Cohen memset(port_attr, 0, sizeof(*port_attr)); 669fad61ad4SEli Cohen err = device->query_port(device, port_num, port_attr); 670fad61ad4SEli Cohen if (err || port_attr->subnet_prefix) 671fad61ad4SEli Cohen return err; 672fad61ad4SEli Cohen 673d7012467SEli Cohen if (rdma_port_get_link_layer(device, port_num) != IB_LINK_LAYER_INFINIBAND) 674d7012467SEli Cohen return 0; 675d7012467SEli Cohen 676fad61ad4SEli Cohen err = ib_query_gid(device, port_num, 0, &gid, NULL); 677fad61ad4SEli Cohen if (err) 678fad61ad4SEli Cohen return err; 679fad61ad4SEli Cohen 680fad61ad4SEli Cohen port_attr->subnet_prefix = be64_to_cpu(gid.global.subnet_prefix); 681fad61ad4SEli Cohen return 0; 6821da177e4SLinus Torvalds } 6831da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_port); 6841da177e4SLinus Torvalds 6851da177e4SLinus Torvalds /** 6861da177e4SLinus Torvalds * ib_query_gid - Get GID table entry 6871da177e4SLinus Torvalds * @device:Device to query 6881da177e4SLinus Torvalds * @port_num:Port number to query 6891da177e4SLinus Torvalds * @index:GID table index to query 6901da177e4SLinus Torvalds * @gid:Returned GID 69155ee3ab2SMatan Barak * @attr: Returned GID attributes related to this GID index (only in RoCE). 69255ee3ab2SMatan Barak * NULL means ignore. 6931da177e4SLinus Torvalds * 6941da177e4SLinus Torvalds * ib_query_gid() fetches the specified GID table entry. 6951da177e4SLinus Torvalds */ 6961da177e4SLinus Torvalds int ib_query_gid(struct ib_device *device, 69755ee3ab2SMatan Barak u8 port_num, int index, union ib_gid *gid, 69855ee3ab2SMatan Barak struct ib_gid_attr *attr) 6991da177e4SLinus Torvalds { 70003db3a2dSMatan Barak if (rdma_cap_roce_gid_table(device, port_num)) 70155ee3ab2SMatan Barak return ib_get_cached_gid(device, port_num, index, gid, attr); 70255ee3ab2SMatan Barak 70355ee3ab2SMatan Barak if (attr) 70455ee3ab2SMatan Barak return -EINVAL; 70503db3a2dSMatan Barak 7061da177e4SLinus Torvalds return device->query_gid(device, port_num, index, gid); 7071da177e4SLinus Torvalds } 7081da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_gid); 7091da177e4SLinus Torvalds 7101da177e4SLinus Torvalds /** 71103db3a2dSMatan Barak * ib_enum_roce_netdev - enumerate all RoCE ports 71203db3a2dSMatan Barak * @ib_dev : IB device we want to query 71303db3a2dSMatan Barak * @filter: Should we call the callback? 71403db3a2dSMatan Barak * @filter_cookie: Cookie passed to filter 71503db3a2dSMatan Barak * @cb: Callback to call for each found RoCE ports 71603db3a2dSMatan Barak * @cookie: Cookie passed back to the callback 71703db3a2dSMatan Barak * 71803db3a2dSMatan Barak * Enumerates all of the physical RoCE ports of ib_dev 71903db3a2dSMatan Barak * which are related to netdevice and calls callback() on each 72003db3a2dSMatan Barak * device for which filter() function returns non zero. 72103db3a2dSMatan Barak */ 72203db3a2dSMatan Barak void ib_enum_roce_netdev(struct ib_device *ib_dev, 72303db3a2dSMatan Barak roce_netdev_filter filter, 72403db3a2dSMatan Barak void *filter_cookie, 72503db3a2dSMatan Barak roce_netdev_callback cb, 72603db3a2dSMatan Barak void *cookie) 72703db3a2dSMatan Barak { 72803db3a2dSMatan Barak u8 port; 72903db3a2dSMatan Barak 73003db3a2dSMatan Barak for (port = rdma_start_port(ib_dev); port <= rdma_end_port(ib_dev); 73103db3a2dSMatan Barak port++) 73203db3a2dSMatan Barak if (rdma_protocol_roce(ib_dev, port)) { 73303db3a2dSMatan Barak struct net_device *idev = NULL; 73403db3a2dSMatan Barak 73503db3a2dSMatan Barak if (ib_dev->get_netdev) 73603db3a2dSMatan Barak idev = ib_dev->get_netdev(ib_dev, port); 73703db3a2dSMatan Barak 73803db3a2dSMatan Barak if (idev && 73903db3a2dSMatan Barak idev->reg_state >= NETREG_UNREGISTERED) { 74003db3a2dSMatan Barak dev_put(idev); 74103db3a2dSMatan Barak idev = NULL; 74203db3a2dSMatan Barak } 74303db3a2dSMatan Barak 74403db3a2dSMatan Barak if (filter(ib_dev, port, idev, filter_cookie)) 74503db3a2dSMatan Barak cb(ib_dev, port, idev, cookie); 74603db3a2dSMatan Barak 74703db3a2dSMatan Barak if (idev) 74803db3a2dSMatan Barak dev_put(idev); 74903db3a2dSMatan Barak } 75003db3a2dSMatan Barak } 75103db3a2dSMatan Barak 75203db3a2dSMatan Barak /** 75303db3a2dSMatan Barak * ib_enum_all_roce_netdevs - enumerate all RoCE devices 75403db3a2dSMatan Barak * @filter: Should we call the callback? 75503db3a2dSMatan Barak * @filter_cookie: Cookie passed to filter 75603db3a2dSMatan Barak * @cb: Callback to call for each found RoCE ports 75703db3a2dSMatan Barak * @cookie: Cookie passed back to the callback 75803db3a2dSMatan Barak * 75903db3a2dSMatan Barak * Enumerates all RoCE devices' physical ports which are related 76003db3a2dSMatan Barak * to netdevices and calls callback() on each device for which 76103db3a2dSMatan Barak * filter() function returns non zero. 76203db3a2dSMatan Barak */ 76303db3a2dSMatan Barak void ib_enum_all_roce_netdevs(roce_netdev_filter filter, 76403db3a2dSMatan Barak void *filter_cookie, 76503db3a2dSMatan Barak roce_netdev_callback cb, 76603db3a2dSMatan Barak void *cookie) 76703db3a2dSMatan Barak { 76803db3a2dSMatan Barak struct ib_device *dev; 76903db3a2dSMatan Barak 77003db3a2dSMatan Barak down_read(&lists_rwsem); 77103db3a2dSMatan Barak list_for_each_entry(dev, &device_list, core_list) 77203db3a2dSMatan Barak ib_enum_roce_netdev(dev, filter, filter_cookie, cb, cookie); 77303db3a2dSMatan Barak up_read(&lists_rwsem); 77403db3a2dSMatan Barak } 77503db3a2dSMatan Barak 77603db3a2dSMatan Barak /** 7771da177e4SLinus Torvalds * ib_query_pkey - Get P_Key table entry 7781da177e4SLinus Torvalds * @device:Device to query 7791da177e4SLinus Torvalds * @port_num:Port number to query 7801da177e4SLinus Torvalds * @index:P_Key table index to query 7811da177e4SLinus Torvalds * @pkey:Returned P_Key 7821da177e4SLinus Torvalds * 7831da177e4SLinus Torvalds * ib_query_pkey() fetches the specified P_Key table entry. 7841da177e4SLinus Torvalds */ 7851da177e4SLinus Torvalds int ib_query_pkey(struct ib_device *device, 7861da177e4SLinus Torvalds u8 port_num, u16 index, u16 *pkey) 7871da177e4SLinus Torvalds { 7881da177e4SLinus Torvalds return device->query_pkey(device, port_num, index, pkey); 7891da177e4SLinus Torvalds } 7901da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_pkey); 7911da177e4SLinus Torvalds 7921da177e4SLinus Torvalds /** 7931da177e4SLinus Torvalds * ib_modify_device - Change IB device attributes 7941da177e4SLinus Torvalds * @device:Device to modify 7951da177e4SLinus Torvalds * @device_modify_mask:Mask of attributes to change 7961da177e4SLinus Torvalds * @device_modify:New attribute values 7971da177e4SLinus Torvalds * 7981da177e4SLinus Torvalds * ib_modify_device() changes a device's attributes as specified by 7991da177e4SLinus Torvalds * the @device_modify_mask and @device_modify structure. 8001da177e4SLinus Torvalds */ 8011da177e4SLinus Torvalds int ib_modify_device(struct ib_device *device, 8021da177e4SLinus Torvalds int device_modify_mask, 8031da177e4SLinus Torvalds struct ib_device_modify *device_modify) 8041da177e4SLinus Torvalds { 80510e1b54bSBart Van Assche if (!device->modify_device) 80610e1b54bSBart Van Assche return -ENOSYS; 80710e1b54bSBart Van Assche 8081da177e4SLinus Torvalds return device->modify_device(device, device_modify_mask, 8091da177e4SLinus Torvalds device_modify); 8101da177e4SLinus Torvalds } 8111da177e4SLinus Torvalds EXPORT_SYMBOL(ib_modify_device); 8121da177e4SLinus Torvalds 8131da177e4SLinus Torvalds /** 8141da177e4SLinus Torvalds * ib_modify_port - Modifies the attributes for the specified port. 8151da177e4SLinus Torvalds * @device: The device to modify. 8161da177e4SLinus Torvalds * @port_num: The number of the port to modify. 8171da177e4SLinus Torvalds * @port_modify_mask: Mask used to specify which attributes of the port 8181da177e4SLinus Torvalds * to change. 8191da177e4SLinus Torvalds * @port_modify: New attribute values for the port. 8201da177e4SLinus Torvalds * 8211da177e4SLinus Torvalds * ib_modify_port() changes a port's attributes as specified by the 8221da177e4SLinus Torvalds * @port_modify_mask and @port_modify structure. 8231da177e4SLinus Torvalds */ 8241da177e4SLinus Torvalds int ib_modify_port(struct ib_device *device, 8251da177e4SLinus Torvalds u8 port_num, int port_modify_mask, 8261da177e4SLinus Torvalds struct ib_port_modify *port_modify) 8271da177e4SLinus Torvalds { 82810e1b54bSBart Van Assche if (!device->modify_port) 82910e1b54bSBart Van Assche return -ENOSYS; 83010e1b54bSBart Van Assche 8310cf18d77SIra Weiny if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) 832116c0074SRoland Dreier return -EINVAL; 833116c0074SRoland Dreier 8341da177e4SLinus Torvalds return device->modify_port(device, port_num, port_modify_mask, 8351da177e4SLinus Torvalds port_modify); 8361da177e4SLinus Torvalds } 8371da177e4SLinus Torvalds EXPORT_SYMBOL(ib_modify_port); 8381da177e4SLinus Torvalds 8395eb620c8SYosef Etigin /** 8405eb620c8SYosef Etigin * ib_find_gid - Returns the port number and GID table index where 8415eb620c8SYosef Etigin * a specified GID value occurs. 8425eb620c8SYosef Etigin * @device: The device to query. 8435eb620c8SYosef Etigin * @gid: The GID value to search for. 844b39ffa1dSMatan Barak * @gid_type: Type of GID. 84555ee3ab2SMatan Barak * @ndev: The ndev related to the GID to search for. 8465eb620c8SYosef Etigin * @port_num: The port number of the device where the GID value was found. 8475eb620c8SYosef Etigin * @index: The index into the GID table where the GID was found. This 8485eb620c8SYosef Etigin * parameter may be NULL. 8495eb620c8SYosef Etigin */ 8505eb620c8SYosef Etigin int ib_find_gid(struct ib_device *device, union ib_gid *gid, 851b39ffa1dSMatan Barak enum ib_gid_type gid_type, struct net_device *ndev, 852b39ffa1dSMatan Barak u8 *port_num, u16 *index) 8535eb620c8SYosef Etigin { 8545eb620c8SYosef Etigin union ib_gid tmp_gid; 8555eb620c8SYosef Etigin int ret, port, i; 8565eb620c8SYosef Etigin 8570cf18d77SIra Weiny for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) { 85803db3a2dSMatan Barak if (rdma_cap_roce_gid_table(device, port)) { 859b39ffa1dSMatan Barak if (!ib_find_cached_gid_by_port(device, gid, gid_type, port, 86055ee3ab2SMatan Barak ndev, index)) { 86103db3a2dSMatan Barak *port_num = port; 86203db3a2dSMatan Barak return 0; 86303db3a2dSMatan Barak } 86498d25afaSDan Carpenter } 86503db3a2dSMatan Barak 866b39ffa1dSMatan Barak if (gid_type != IB_GID_TYPE_IB) 867b39ffa1dSMatan Barak continue; 868b39ffa1dSMatan Barak 8697738613eSIra Weiny for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) { 87055ee3ab2SMatan Barak ret = ib_query_gid(device, port, i, &tmp_gid, NULL); 8715eb620c8SYosef Etigin if (ret) 8725eb620c8SYosef Etigin return ret; 8735eb620c8SYosef Etigin if (!memcmp(&tmp_gid, gid, sizeof *gid)) { 8745eb620c8SYosef Etigin *port_num = port; 8755eb620c8SYosef Etigin if (index) 8765eb620c8SYosef Etigin *index = i; 8775eb620c8SYosef Etigin return 0; 8785eb620c8SYosef Etigin } 8795eb620c8SYosef Etigin } 8805eb620c8SYosef Etigin } 8815eb620c8SYosef Etigin 8825eb620c8SYosef Etigin return -ENOENT; 8835eb620c8SYosef Etigin } 8845eb620c8SYosef Etigin EXPORT_SYMBOL(ib_find_gid); 8855eb620c8SYosef Etigin 8865eb620c8SYosef Etigin /** 8875eb620c8SYosef Etigin * ib_find_pkey - Returns the PKey table index where a specified 8885eb620c8SYosef Etigin * PKey value occurs. 8895eb620c8SYosef Etigin * @device: The device to query. 8905eb620c8SYosef Etigin * @port_num: The port number of the device to search for the PKey. 8915eb620c8SYosef Etigin * @pkey: The PKey value to search for. 8925eb620c8SYosef Etigin * @index: The index into the PKey table where the PKey was found. 8935eb620c8SYosef Etigin */ 8945eb620c8SYosef Etigin int ib_find_pkey(struct ib_device *device, 8955eb620c8SYosef Etigin u8 port_num, u16 pkey, u16 *index) 8965eb620c8SYosef Etigin { 8975eb620c8SYosef Etigin int ret, i; 8985eb620c8SYosef Etigin u16 tmp_pkey; 899ff7166c4SJack Morgenstein int partial_ix = -1; 9005eb620c8SYosef Etigin 9017738613eSIra Weiny for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) { 9025eb620c8SYosef Etigin ret = ib_query_pkey(device, port_num, i, &tmp_pkey); 9035eb620c8SYosef Etigin if (ret) 9045eb620c8SYosef Etigin return ret; 90536026eccSMoni Shoua if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) { 906ff7166c4SJack Morgenstein /* if there is full-member pkey take it.*/ 907ff7166c4SJack Morgenstein if (tmp_pkey & 0x8000) { 9085eb620c8SYosef Etigin *index = i; 9095eb620c8SYosef Etigin return 0; 9105eb620c8SYosef Etigin } 911ff7166c4SJack Morgenstein if (partial_ix < 0) 912ff7166c4SJack Morgenstein partial_ix = i; 913ff7166c4SJack Morgenstein } 9145eb620c8SYosef Etigin } 9155eb620c8SYosef Etigin 916ff7166c4SJack Morgenstein /*no full-member, if exists take the limited*/ 917ff7166c4SJack Morgenstein if (partial_ix >= 0) { 918ff7166c4SJack Morgenstein *index = partial_ix; 919ff7166c4SJack Morgenstein return 0; 920ff7166c4SJack Morgenstein } 9215eb620c8SYosef Etigin return -ENOENT; 9225eb620c8SYosef Etigin } 9235eb620c8SYosef Etigin EXPORT_SYMBOL(ib_find_pkey); 9245eb620c8SYosef Etigin 9259268f72dSYotam Kenneth /** 9269268f72dSYotam Kenneth * ib_get_net_dev_by_params() - Return the appropriate net_dev 9279268f72dSYotam Kenneth * for a received CM request 9289268f72dSYotam Kenneth * @dev: An RDMA device on which the request has been received. 9299268f72dSYotam Kenneth * @port: Port number on the RDMA device. 9309268f72dSYotam Kenneth * @pkey: The Pkey the request came on. 9319268f72dSYotam Kenneth * @gid: A GID that the net_dev uses to communicate. 9329268f72dSYotam Kenneth * @addr: Contains the IP address that the request specified as its 9339268f72dSYotam Kenneth * destination. 9349268f72dSYotam Kenneth */ 9359268f72dSYotam Kenneth struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, 9369268f72dSYotam Kenneth u8 port, 9379268f72dSYotam Kenneth u16 pkey, 9389268f72dSYotam Kenneth const union ib_gid *gid, 9399268f72dSYotam Kenneth const struct sockaddr *addr) 9409268f72dSYotam Kenneth { 9419268f72dSYotam Kenneth struct net_device *net_dev = NULL; 9429268f72dSYotam Kenneth struct ib_client_data *context; 9439268f72dSYotam Kenneth 9449268f72dSYotam Kenneth if (!rdma_protocol_ib(dev, port)) 9459268f72dSYotam Kenneth return NULL; 9469268f72dSYotam Kenneth 9479268f72dSYotam Kenneth down_read(&lists_rwsem); 9489268f72dSYotam Kenneth 9499268f72dSYotam Kenneth list_for_each_entry(context, &dev->client_data_list, list) { 9509268f72dSYotam Kenneth struct ib_client *client = context->client; 9519268f72dSYotam Kenneth 9529268f72dSYotam Kenneth if (context->going_down) 9539268f72dSYotam Kenneth continue; 9549268f72dSYotam Kenneth 9559268f72dSYotam Kenneth if (client->get_net_dev_by_params) { 9569268f72dSYotam Kenneth net_dev = client->get_net_dev_by_params(dev, port, pkey, 9579268f72dSYotam Kenneth gid, addr, 9589268f72dSYotam Kenneth context->data); 9599268f72dSYotam Kenneth if (net_dev) 9609268f72dSYotam Kenneth break; 9619268f72dSYotam Kenneth } 9629268f72dSYotam Kenneth } 9639268f72dSYotam Kenneth 9649268f72dSYotam Kenneth up_read(&lists_rwsem); 9659268f72dSYotam Kenneth 9669268f72dSYotam Kenneth return net_dev; 9679268f72dSYotam Kenneth } 9689268f72dSYotam Kenneth EXPORT_SYMBOL(ib_get_net_dev_by_params); 9699268f72dSYotam Kenneth 970735c631aSMark Bloch static struct ibnl_client_cbs ibnl_ls_cb_table[] = { 971735c631aSMark Bloch [RDMA_NL_LS_OP_RESOLVE] = { 972735c631aSMark Bloch .dump = ib_nl_handle_resolve_resp, 973735c631aSMark Bloch .module = THIS_MODULE }, 974735c631aSMark Bloch [RDMA_NL_LS_OP_SET_TIMEOUT] = { 975735c631aSMark Bloch .dump = ib_nl_handle_set_timeout, 976735c631aSMark Bloch .module = THIS_MODULE }, 977ae43f828SMark Bloch [RDMA_NL_LS_OP_IP_RESOLVE] = { 978ae43f828SMark Bloch .dump = ib_nl_handle_ip_res_resp, 979ae43f828SMark Bloch .module = THIS_MODULE }, 980735c631aSMark Bloch }; 981735c631aSMark Bloch 982735c631aSMark Bloch static int ib_add_ibnl_clients(void) 983735c631aSMark Bloch { 984735c631aSMark Bloch return ibnl_add_client(RDMA_NL_LS, ARRAY_SIZE(ibnl_ls_cb_table), 985735c631aSMark Bloch ibnl_ls_cb_table); 986735c631aSMark Bloch } 987735c631aSMark Bloch 988735c631aSMark Bloch static void ib_remove_ibnl_clients(void) 989735c631aSMark Bloch { 990735c631aSMark Bloch ibnl_remove_client(RDMA_NL_LS); 991735c631aSMark Bloch } 992735c631aSMark Bloch 9931da177e4SLinus Torvalds static int __init ib_core_init(void) 9941da177e4SLinus Torvalds { 9951da177e4SLinus Torvalds int ret; 9961da177e4SLinus Torvalds 997f0626710STejun Heo ib_wq = alloc_workqueue("infiniband", 0, 0); 998f0626710STejun Heo if (!ib_wq) 999f0626710STejun Heo return -ENOMEM; 1000f0626710STejun Heo 100114d3a3b2SChristoph Hellwig ib_comp_wq = alloc_workqueue("ib-comp-wq", 100214d3a3b2SChristoph Hellwig WQ_UNBOUND | WQ_HIGHPRI | WQ_MEM_RECLAIM, 100314d3a3b2SChristoph Hellwig WQ_UNBOUND_MAX_ACTIVE); 100414d3a3b2SChristoph Hellwig if (!ib_comp_wq) { 100514d3a3b2SChristoph Hellwig ret = -ENOMEM; 100614d3a3b2SChristoph Hellwig goto err; 100714d3a3b2SChristoph Hellwig } 100814d3a3b2SChristoph Hellwig 100955aeed06SJason Gunthorpe ret = class_register(&ib_class); 1010fd75c789SNir Muchtar if (ret) { 1011aba25a3eSParav Pandit pr_warn("Couldn't create InfiniBand device class\n"); 101214d3a3b2SChristoph Hellwig goto err_comp; 1013fd75c789SNir Muchtar } 10141da177e4SLinus Torvalds 1015b2cbae2cSRoland Dreier ret = ibnl_init(); 10161da177e4SLinus Torvalds if (ret) { 1017aba25a3eSParav Pandit pr_warn("Couldn't init IB netlink interface\n"); 1018fd75c789SNir Muchtar goto err_sysfs; 10191da177e4SLinus Torvalds } 10201da177e4SLinus Torvalds 1021e3f20f02SLeon Romanovsky ret = addr_init(); 1022e3f20f02SLeon Romanovsky if (ret) { 1023e3f20f02SLeon Romanovsky pr_warn("Could't init IB address resolution\n"); 1024e3f20f02SLeon Romanovsky goto err_ibnl; 1025e3f20f02SLeon Romanovsky } 1026e3f20f02SLeon Romanovsky 10274c2cb422SMark Bloch ret = ib_mad_init(); 10284c2cb422SMark Bloch if (ret) { 10294c2cb422SMark Bloch pr_warn("Couldn't init IB MAD\n"); 10304c2cb422SMark Bloch goto err_addr; 10314c2cb422SMark Bloch } 10324c2cb422SMark Bloch 1033c2e49c92SMark Bloch ret = ib_sa_init(); 1034c2e49c92SMark Bloch if (ret) { 1035c2e49c92SMark Bloch pr_warn("Couldn't init SA\n"); 1036c2e49c92SMark Bloch goto err_mad; 1037c2e49c92SMark Bloch } 1038c2e49c92SMark Bloch 1039da1f857bSDan Carpenter ret = ib_add_ibnl_clients(); 1040da1f857bSDan Carpenter if (ret) { 1041735c631aSMark Bloch pr_warn("Couldn't register ibnl clients\n"); 1042735c631aSMark Bloch goto err_sa; 1043735c631aSMark Bloch } 1044735c631aSMark Bloch 104503db3a2dSMatan Barak ib_cache_setup(); 1046b2cbae2cSRoland Dreier 1047fd75c789SNir Muchtar return 0; 1048fd75c789SNir Muchtar 1049735c631aSMark Bloch err_sa: 1050735c631aSMark Bloch ib_sa_cleanup(); 1051c2e49c92SMark Bloch err_mad: 1052c2e49c92SMark Bloch ib_mad_cleanup(); 10534c2cb422SMark Bloch err_addr: 10544c2cb422SMark Bloch addr_cleanup(); 1055e3f20f02SLeon Romanovsky err_ibnl: 1056e3f20f02SLeon Romanovsky ibnl_cleanup(); 1057fd75c789SNir Muchtar err_sysfs: 105855aeed06SJason Gunthorpe class_unregister(&ib_class); 105914d3a3b2SChristoph Hellwig err_comp: 106014d3a3b2SChristoph Hellwig destroy_workqueue(ib_comp_wq); 1061fd75c789SNir Muchtar err: 1062fd75c789SNir Muchtar destroy_workqueue(ib_wq); 10631da177e4SLinus Torvalds return ret; 10641da177e4SLinus Torvalds } 10651da177e4SLinus Torvalds 10661da177e4SLinus Torvalds static void __exit ib_core_cleanup(void) 10671da177e4SLinus Torvalds { 10681da177e4SLinus Torvalds ib_cache_cleanup(); 1069735c631aSMark Bloch ib_remove_ibnl_clients(); 1070c2e49c92SMark Bloch ib_sa_cleanup(); 10714c2cb422SMark Bloch ib_mad_cleanup(); 1072e3f20f02SLeon Romanovsky addr_cleanup(); 1073b2cbae2cSRoland Dreier ibnl_cleanup(); 107455aeed06SJason Gunthorpe class_unregister(&ib_class); 107514d3a3b2SChristoph Hellwig destroy_workqueue(ib_comp_wq); 1076f7c6a7b5SRoland Dreier /* Make sure that any pending umem accounting work is done. */ 1077f0626710STejun Heo destroy_workqueue(ib_wq); 10781da177e4SLinus Torvalds } 10791da177e4SLinus Torvalds 10801da177e4SLinus Torvalds module_init(ib_core_init); 10811da177e4SLinus Torvalds module_exit(ib_core_cleanup); 1082