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 1754be3a4faSParav Pandit WARN_ON(dev->reg_state == IB_DEV_REGISTERED); 1764be3a4faSParav Pandit if (dev->reg_state == IB_DEV_UNREGISTERED) { 1774be3a4faSParav Pandit /* 1784be3a4faSParav Pandit * In IB_DEV_UNINITIALIZED state, cache or port table 1794be3a4faSParav Pandit * is not even created. Free cache and port table only when 1804be3a4faSParav Pandit * device reaches UNREGISTERED state. 1814be3a4faSParav Pandit */ 18203db3a2dSMatan Barak ib_cache_release_one(dev); 18355aeed06SJason Gunthorpe kfree(dev->port_immutable); 1844be3a4faSParav Pandit } 18555aeed06SJason Gunthorpe kfree(dev); 18655aeed06SJason Gunthorpe } 18755aeed06SJason Gunthorpe 18855aeed06SJason Gunthorpe static int ib_device_uevent(struct device *device, 18955aeed06SJason Gunthorpe struct kobj_uevent_env *env) 19055aeed06SJason Gunthorpe { 19155aeed06SJason Gunthorpe struct ib_device *dev = container_of(device, struct ib_device, dev); 19255aeed06SJason Gunthorpe 19355aeed06SJason Gunthorpe if (add_uevent_var(env, "NAME=%s", dev->name)) 19455aeed06SJason Gunthorpe return -ENOMEM; 19555aeed06SJason Gunthorpe 19655aeed06SJason Gunthorpe /* 19755aeed06SJason Gunthorpe * It would be nice to pass the node GUID with the event... 19855aeed06SJason Gunthorpe */ 19955aeed06SJason Gunthorpe 20055aeed06SJason Gunthorpe return 0; 20155aeed06SJason Gunthorpe } 20255aeed06SJason Gunthorpe 20355aeed06SJason Gunthorpe static struct class ib_class = { 20455aeed06SJason Gunthorpe .name = "infiniband", 20555aeed06SJason Gunthorpe .dev_release = ib_device_release, 20655aeed06SJason Gunthorpe .dev_uevent = ib_device_uevent, 20755aeed06SJason Gunthorpe }; 20855aeed06SJason Gunthorpe 2091da177e4SLinus Torvalds /** 2101da177e4SLinus Torvalds * ib_alloc_device - allocate an IB device struct 2111da177e4SLinus Torvalds * @size:size of structure to allocate 2121da177e4SLinus Torvalds * 2131da177e4SLinus Torvalds * Low-level drivers should use ib_alloc_device() to allocate &struct 2141da177e4SLinus Torvalds * ib_device. @size is the size of the structure to be allocated, 2151da177e4SLinus Torvalds * including any private data used by the low-level driver. 2161da177e4SLinus Torvalds * ib_dealloc_device() must be used to free structures allocated with 2171da177e4SLinus Torvalds * ib_alloc_device(). 2181da177e4SLinus Torvalds */ 2191da177e4SLinus Torvalds struct ib_device *ib_alloc_device(size_t size) 2201da177e4SLinus Torvalds { 22155aeed06SJason Gunthorpe struct ib_device *device; 2221da177e4SLinus Torvalds 22355aeed06SJason Gunthorpe if (WARN_ON(size < sizeof(struct ib_device))) 22455aeed06SJason Gunthorpe return NULL; 22555aeed06SJason Gunthorpe 22655aeed06SJason Gunthorpe device = kzalloc(size, GFP_KERNEL); 22755aeed06SJason Gunthorpe if (!device) 22855aeed06SJason Gunthorpe return NULL; 22955aeed06SJason Gunthorpe 23055aeed06SJason Gunthorpe device->dev.class = &ib_class; 23155aeed06SJason Gunthorpe device_initialize(&device->dev); 23255aeed06SJason Gunthorpe 23355aeed06SJason Gunthorpe dev_set_drvdata(&device->dev, device); 23455aeed06SJason Gunthorpe 23555aeed06SJason Gunthorpe INIT_LIST_HEAD(&device->event_handler_list); 23655aeed06SJason Gunthorpe spin_lock_init(&device->event_handler_lock); 23755aeed06SJason Gunthorpe spin_lock_init(&device->client_data_lock); 23855aeed06SJason Gunthorpe INIT_LIST_HEAD(&device->client_data_list); 23955aeed06SJason Gunthorpe INIT_LIST_HEAD(&device->port_list); 24055aeed06SJason Gunthorpe 24155aeed06SJason Gunthorpe return device; 2421da177e4SLinus Torvalds } 2431da177e4SLinus Torvalds EXPORT_SYMBOL(ib_alloc_device); 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds /** 2461da177e4SLinus Torvalds * ib_dealloc_device - free an IB device struct 2471da177e4SLinus Torvalds * @device:structure to free 2481da177e4SLinus Torvalds * 2491da177e4SLinus Torvalds * Free a structure allocated with ib_alloc_device(). 2501da177e4SLinus Torvalds */ 2511da177e4SLinus Torvalds void ib_dealloc_device(struct ib_device *device) 2521da177e4SLinus Torvalds { 25355aeed06SJason Gunthorpe WARN_ON(device->reg_state != IB_DEV_UNREGISTERED && 25455aeed06SJason Gunthorpe device->reg_state != IB_DEV_UNINITIALIZED); 2559206dff1SRoland Dreier kobject_put(&device->dev.kobj); 2561da177e4SLinus Torvalds } 2571da177e4SLinus Torvalds EXPORT_SYMBOL(ib_dealloc_device); 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvalds static int add_client_context(struct ib_device *device, struct ib_client *client) 2601da177e4SLinus Torvalds { 2611da177e4SLinus Torvalds struct ib_client_data *context; 2621da177e4SLinus Torvalds unsigned long flags; 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvalds context = kmalloc(sizeof *context, GFP_KERNEL); 265a0b3455fSLeon Romanovsky if (!context) 2661da177e4SLinus Torvalds return -ENOMEM; 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds context->client = client; 2691da177e4SLinus Torvalds context->data = NULL; 2707c1eb45aSHaggai Eran context->going_down = false; 2711da177e4SLinus Torvalds 2727c1eb45aSHaggai Eran down_write(&lists_rwsem); 2731da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 2741da177e4SLinus Torvalds list_add(&context->list, &device->client_data_list); 2751da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 2767c1eb45aSHaggai Eran up_write(&lists_rwsem); 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds return 0; 2791da177e4SLinus Torvalds } 2801da177e4SLinus Torvalds 281337877a4SIra Weiny static int verify_immutable(const struct ib_device *dev, u8 port) 282337877a4SIra Weiny { 283337877a4SIra Weiny return WARN_ON(!rdma_cap_ib_mad(dev, port) && 284337877a4SIra Weiny rdma_max_mad_size(dev, port) != 0); 285337877a4SIra Weiny } 286337877a4SIra Weiny 2877738613eSIra Weiny static int read_port_immutable(struct ib_device *device) 2885eb620c8SYosef Etigin { 28955aeed06SJason Gunthorpe int ret; 2907738613eSIra Weiny u8 start_port = rdma_start_port(device); 2917738613eSIra Weiny u8 end_port = rdma_end_port(device); 2927738613eSIra Weiny u8 port; 2935eb620c8SYosef Etigin 2947738613eSIra Weiny /** 2957738613eSIra Weiny * device->port_immutable is indexed directly by the port number to make 2967738613eSIra Weiny * access to this data as efficient as possible. 2977738613eSIra Weiny * 2987738613eSIra Weiny * Therefore port_immutable is declared as a 1 based array with 2997738613eSIra Weiny * potential empty slots at the beginning. 3007738613eSIra Weiny */ 3017738613eSIra Weiny device->port_immutable = kzalloc(sizeof(*device->port_immutable) 3027738613eSIra Weiny * (end_port + 1), 3035eb620c8SYosef Etigin GFP_KERNEL); 3047738613eSIra Weiny if (!device->port_immutable) 30555aeed06SJason Gunthorpe return -ENOMEM; 3065eb620c8SYosef Etigin 3077738613eSIra Weiny for (port = start_port; port <= end_port; ++port) { 3087738613eSIra Weiny ret = device->get_port_immutable(device, port, 3097738613eSIra Weiny &device->port_immutable[port]); 3105eb620c8SYosef Etigin if (ret) 3115eb620c8SYosef Etigin return ret; 31255aeed06SJason Gunthorpe 31355aeed06SJason Gunthorpe if (verify_immutable(device, port)) 31455aeed06SJason Gunthorpe return -EINVAL; 31555aeed06SJason Gunthorpe } 31655aeed06SJason Gunthorpe return 0; 3175eb620c8SYosef Etigin } 3185eb620c8SYosef Etigin 3195fa76c20SIra Weiny void ib_get_device_fw_str(struct ib_device *dev, char *str, size_t str_len) 3205fa76c20SIra Weiny { 3215fa76c20SIra Weiny if (dev->get_dev_fw_str) 3225fa76c20SIra Weiny dev->get_dev_fw_str(dev, str, str_len); 3235fa76c20SIra Weiny else 3245fa76c20SIra Weiny str[0] = '\0'; 3255fa76c20SIra Weiny } 3265fa76c20SIra Weiny EXPORT_SYMBOL(ib_get_device_fw_str); 3275fa76c20SIra Weiny 3281da177e4SLinus Torvalds /** 3291da177e4SLinus Torvalds * ib_register_device - Register an IB device with IB core 3301da177e4SLinus Torvalds * @device:Device to register 3311da177e4SLinus Torvalds * 3321da177e4SLinus Torvalds * Low-level drivers use ib_register_device() to register their 3331da177e4SLinus Torvalds * devices with the IB core. All registered clients will receive a 3341da177e4SLinus Torvalds * callback for each device that is added. @device must be allocated 3351da177e4SLinus Torvalds * with ib_alloc_device(). 3361da177e4SLinus Torvalds */ 3379a6edb60SRalph Campbell int ib_register_device(struct ib_device *device, 3389a6edb60SRalph Campbell int (*port_callback)(struct ib_device *, 3399a6edb60SRalph Campbell u8, struct kobject *)) 3401da177e4SLinus Torvalds { 3411da177e4SLinus Torvalds int ret; 342b8071ad8SDoug Ledford struct ib_client *client; 3433e153a93SIra Weiny struct ib_udata uhw = {.outlen = 0, .inlen = 0}; 34499db9494SBart Van Assche struct device *parent = device->dev.parent; 3451da177e4SLinus Torvalds 34699db9494SBart Van Assche WARN_ON_ONCE(!parent); 3470957c29fSBart Van Assche WARN_ON_ONCE(device->dma_device); 3480957c29fSBart Van Assche if (device->dev.dma_ops) { 3490957c29fSBart Van Assche /* 3500957c29fSBart Van Assche * The caller provided custom DMA operations. Copy the 3510957c29fSBart Van Assche * DMA-related fields that are used by e.g. dma_alloc_coherent() 3520957c29fSBart Van Assche * into device->dev. 3530957c29fSBart Van Assche */ 3540957c29fSBart Van Assche device->dma_device = &device->dev; 35599db9494SBart Van Assche if (!device->dev.dma_mask) 35699db9494SBart Van Assche device->dev.dma_mask = parent->dma_mask; 35799db9494SBart Van Assche if (!device->dev.coherent_dma_mask) 3580957c29fSBart Van Assche device->dev.coherent_dma_mask = 3590957c29fSBart Van Assche parent->coherent_dma_mask; 3600957c29fSBart Van Assche } else { 3610957c29fSBart Van Assche /* 3620957c29fSBart Van Assche * The caller did not provide custom DMA operations. Use the 3630957c29fSBart Van Assche * DMA mapping operations of the parent device. 3640957c29fSBart Van Assche */ 3650957c29fSBart Van Assche device->dma_device = parent; 3660957c29fSBart Van Assche } 3671da177e4SLinus Torvalds 36895ed644fSIngo Molnar mutex_lock(&device_mutex); 3691da177e4SLinus Torvalds 3701da177e4SLinus Torvalds if (strchr(device->name, '%')) { 3711da177e4SLinus Torvalds ret = alloc_name(device->name); 3721da177e4SLinus Torvalds if (ret) 3731da177e4SLinus Torvalds goto out; 3741da177e4SLinus Torvalds } 3751da177e4SLinus Torvalds 3761da177e4SLinus Torvalds if (ib_device_check_mandatory(device)) { 3771da177e4SLinus Torvalds ret = -EINVAL; 3781da177e4SLinus Torvalds goto out; 3791da177e4SLinus Torvalds } 3801da177e4SLinus Torvalds 3817738613eSIra Weiny ret = read_port_immutable(device); 3825eb620c8SYosef Etigin if (ret) { 383aba25a3eSParav Pandit pr_warn("Couldn't create per port immutable data %s\n", 3845eb620c8SYosef Etigin device->name); 3855eb620c8SYosef Etigin goto out; 3865eb620c8SYosef Etigin } 3875eb620c8SYosef Etigin 38803db3a2dSMatan Barak ret = ib_cache_setup_one(device); 38903db3a2dSMatan Barak if (ret) { 390aba25a3eSParav Pandit pr_warn("Couldn't set up InfiniBand P_Key/GID cache\n"); 3914be3a4faSParav Pandit goto port_cleanup; 39203db3a2dSMatan Barak } 39303db3a2dSMatan Barak 39443579b5fSParav Pandit ret = ib_device_register_rdmacg(device); 39543579b5fSParav Pandit if (ret) { 39643579b5fSParav Pandit pr_warn("Couldn't register device with rdma cgroup\n"); 3974be3a4faSParav Pandit goto cache_cleanup; 39843579b5fSParav Pandit } 39943579b5fSParav Pandit 4003e153a93SIra Weiny memset(&device->attrs, 0, sizeof(device->attrs)); 4013e153a93SIra Weiny ret = device->query_device(device, &device->attrs, &uhw); 4023e153a93SIra Weiny if (ret) { 403aba25a3eSParav Pandit pr_warn("Couldn't query the device attributes\n"); 4044be3a4faSParav Pandit goto cache_cleanup; 4053e153a93SIra Weiny } 4063e153a93SIra Weiny 4079a6edb60SRalph Campbell ret = ib_device_register_sysfs(device, port_callback); 4081da177e4SLinus Torvalds if (ret) { 409aba25a3eSParav Pandit pr_warn("Couldn't register device %s with driver model\n", 4101da177e4SLinus Torvalds device->name); 4114be3a4faSParav Pandit goto cache_cleanup; 4121da177e4SLinus Torvalds } 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds device->reg_state = IB_DEV_REGISTERED; 4151da177e4SLinus Torvalds 4161da177e4SLinus Torvalds list_for_each_entry(client, &client_list, list) 4171da177e4SLinus Torvalds if (client->add && !add_client_context(device, client)) 4181da177e4SLinus Torvalds client->add(device); 4191da177e4SLinus Torvalds 4205aa44bb9SHaggai Eran down_write(&lists_rwsem); 4215aa44bb9SHaggai Eran list_add_tail(&device->core_list, &device_list); 4225aa44bb9SHaggai Eran up_write(&lists_rwsem); 4234be3a4faSParav Pandit mutex_unlock(&device_mutex); 4244be3a4faSParav Pandit return 0; 4254be3a4faSParav Pandit 4264be3a4faSParav Pandit cache_cleanup: 4274be3a4faSParav Pandit ib_cache_cleanup_one(device); 4284be3a4faSParav Pandit ib_cache_release_one(device); 4294be3a4faSParav Pandit port_cleanup: 4304be3a4faSParav Pandit kfree(device->port_immutable); 4311da177e4SLinus Torvalds out: 43295ed644fSIngo Molnar mutex_unlock(&device_mutex); 4331da177e4SLinus Torvalds return ret; 4341da177e4SLinus Torvalds } 4351da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_device); 4361da177e4SLinus Torvalds 4371da177e4SLinus Torvalds /** 4381da177e4SLinus Torvalds * ib_unregister_device - Unregister an IB device 4391da177e4SLinus Torvalds * @device:Device to unregister 4401da177e4SLinus Torvalds * 4411da177e4SLinus Torvalds * Unregister an IB device. All clients will receive a remove callback. 4421da177e4SLinus Torvalds */ 4431da177e4SLinus Torvalds void ib_unregister_device(struct ib_device *device) 4441da177e4SLinus Torvalds { 4451da177e4SLinus Torvalds struct ib_client_data *context, *tmp; 4461da177e4SLinus Torvalds unsigned long flags; 4471da177e4SLinus Torvalds 44895ed644fSIngo Molnar mutex_lock(&device_mutex); 4491da177e4SLinus Torvalds 4505aa44bb9SHaggai Eran down_write(&lists_rwsem); 4515aa44bb9SHaggai Eran list_del(&device->core_list); 4527c1eb45aSHaggai Eran spin_lock_irqsave(&device->client_data_lock, flags); 4537c1eb45aSHaggai Eran list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 4547c1eb45aSHaggai Eran context->going_down = true; 4557c1eb45aSHaggai Eran spin_unlock_irqrestore(&device->client_data_lock, flags); 4567c1eb45aSHaggai Eran downgrade_write(&lists_rwsem); 4575aa44bb9SHaggai Eran 4587c1eb45aSHaggai Eran list_for_each_entry_safe(context, tmp, &device->client_data_list, 4597c1eb45aSHaggai Eran list) { 4607c1eb45aSHaggai Eran if (context->client->remove) 4617c1eb45aSHaggai Eran context->client->remove(device, context->data); 4627c1eb45aSHaggai Eran } 4637c1eb45aSHaggai Eran up_read(&lists_rwsem); 4641da177e4SLinus Torvalds 46595ed644fSIngo Molnar mutex_unlock(&device_mutex); 4661da177e4SLinus Torvalds 46743579b5fSParav Pandit ib_device_unregister_rdmacg(device); 4689206dff1SRoland Dreier ib_device_unregister_sysfs(device); 46903db3a2dSMatan Barak ib_cache_cleanup_one(device); 4709206dff1SRoland Dreier 4717c1eb45aSHaggai Eran down_write(&lists_rwsem); 4721da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 4731da177e4SLinus Torvalds list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 4741da177e4SLinus Torvalds kfree(context); 4751da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 4767c1eb45aSHaggai Eran up_write(&lists_rwsem); 4771da177e4SLinus Torvalds 4781da177e4SLinus Torvalds device->reg_state = IB_DEV_UNREGISTERED; 4791da177e4SLinus Torvalds } 4801da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_device); 4811da177e4SLinus Torvalds 4821da177e4SLinus Torvalds /** 4831da177e4SLinus Torvalds * ib_register_client - Register an IB client 4841da177e4SLinus Torvalds * @client:Client to register 4851da177e4SLinus Torvalds * 4861da177e4SLinus Torvalds * Upper level users of the IB drivers can use ib_register_client() to 4871da177e4SLinus Torvalds * register callbacks for IB device addition and removal. When an IB 4881da177e4SLinus Torvalds * device is added, each registered client's add method will be called 4891da177e4SLinus Torvalds * (in the order the clients were registered), and when a device is 4901da177e4SLinus Torvalds * removed, each client's remove method will be called (in the reverse 4911da177e4SLinus Torvalds * order that clients were registered). In addition, when 4921da177e4SLinus Torvalds * ib_register_client() is called, the client will receive an add 4931da177e4SLinus Torvalds * callback for all devices already registered. 4941da177e4SLinus Torvalds */ 4951da177e4SLinus Torvalds int ib_register_client(struct ib_client *client) 4961da177e4SLinus Torvalds { 4971da177e4SLinus Torvalds struct ib_device *device; 4981da177e4SLinus Torvalds 49995ed644fSIngo Molnar mutex_lock(&device_mutex); 5001da177e4SLinus Torvalds 5011da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) 5021da177e4SLinus Torvalds if (client->add && !add_client_context(device, client)) 5031da177e4SLinus Torvalds client->add(device); 5041da177e4SLinus Torvalds 5055aa44bb9SHaggai Eran down_write(&lists_rwsem); 5065aa44bb9SHaggai Eran list_add_tail(&client->list, &client_list); 5075aa44bb9SHaggai Eran up_write(&lists_rwsem); 5085aa44bb9SHaggai Eran 50995ed644fSIngo Molnar mutex_unlock(&device_mutex); 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds return 0; 5121da177e4SLinus Torvalds } 5131da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_client); 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvalds /** 5161da177e4SLinus Torvalds * ib_unregister_client - Unregister an IB client 5171da177e4SLinus Torvalds * @client:Client to unregister 5181da177e4SLinus Torvalds * 5191da177e4SLinus Torvalds * Upper level users use ib_unregister_client() to remove their client 5201da177e4SLinus Torvalds * registration. When ib_unregister_client() is called, the client 5211da177e4SLinus Torvalds * will receive a remove callback for each IB device still registered. 5221da177e4SLinus Torvalds */ 5231da177e4SLinus Torvalds void ib_unregister_client(struct ib_client *client) 5241da177e4SLinus Torvalds { 5251da177e4SLinus Torvalds struct ib_client_data *context, *tmp; 5261da177e4SLinus Torvalds struct ib_device *device; 5271da177e4SLinus Torvalds unsigned long flags; 5281da177e4SLinus Torvalds 52995ed644fSIngo Molnar mutex_lock(&device_mutex); 5301da177e4SLinus Torvalds 5315aa44bb9SHaggai Eran down_write(&lists_rwsem); 5325aa44bb9SHaggai Eran list_del(&client->list); 5335aa44bb9SHaggai Eran up_write(&lists_rwsem); 5345aa44bb9SHaggai Eran 5351da177e4SLinus Torvalds list_for_each_entry(device, &device_list, core_list) { 5367c1eb45aSHaggai Eran struct ib_client_data *found_context = NULL; 5371da177e4SLinus Torvalds 5387c1eb45aSHaggai Eran down_write(&lists_rwsem); 5391da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 5401da177e4SLinus Torvalds list_for_each_entry_safe(context, tmp, &device->client_data_list, list) 5411da177e4SLinus Torvalds if (context->client == client) { 5427c1eb45aSHaggai Eran context->going_down = true; 5437c1eb45aSHaggai Eran found_context = context; 5447c1eb45aSHaggai Eran break; 5451da177e4SLinus Torvalds } 5461da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 5477c1eb45aSHaggai Eran up_write(&lists_rwsem); 5487c1eb45aSHaggai Eran 5497c1eb45aSHaggai Eran if (client->remove) 5507c1eb45aSHaggai Eran client->remove(device, found_context ? 5517c1eb45aSHaggai Eran found_context->data : NULL); 5527c1eb45aSHaggai Eran 5537c1eb45aSHaggai Eran if (!found_context) { 5547c1eb45aSHaggai Eran pr_warn("No client context found for %s/%s\n", 5557c1eb45aSHaggai Eran device->name, client->name); 5567c1eb45aSHaggai Eran continue; 5577c1eb45aSHaggai Eran } 5587c1eb45aSHaggai Eran 5597c1eb45aSHaggai Eran down_write(&lists_rwsem); 5607c1eb45aSHaggai Eran spin_lock_irqsave(&device->client_data_lock, flags); 5617c1eb45aSHaggai Eran list_del(&found_context->list); 5627c1eb45aSHaggai Eran kfree(found_context); 5637c1eb45aSHaggai Eran spin_unlock_irqrestore(&device->client_data_lock, flags); 5647c1eb45aSHaggai Eran up_write(&lists_rwsem); 5651da177e4SLinus Torvalds } 5661da177e4SLinus Torvalds 56795ed644fSIngo Molnar mutex_unlock(&device_mutex); 5681da177e4SLinus Torvalds } 5691da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_client); 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds /** 5721da177e4SLinus Torvalds * ib_get_client_data - Get IB client context 5731da177e4SLinus Torvalds * @device:Device to get context for 5741da177e4SLinus Torvalds * @client:Client to get context for 5751da177e4SLinus Torvalds * 5761da177e4SLinus Torvalds * ib_get_client_data() returns client context set with 5771da177e4SLinus Torvalds * ib_set_client_data(). 5781da177e4SLinus Torvalds */ 5791da177e4SLinus Torvalds void *ib_get_client_data(struct ib_device *device, struct ib_client *client) 5801da177e4SLinus Torvalds { 5811da177e4SLinus Torvalds struct ib_client_data *context; 5821da177e4SLinus Torvalds void *ret = NULL; 5831da177e4SLinus Torvalds unsigned long flags; 5841da177e4SLinus Torvalds 5851da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 5861da177e4SLinus Torvalds list_for_each_entry(context, &device->client_data_list, list) 5871da177e4SLinus Torvalds if (context->client == client) { 5881da177e4SLinus Torvalds ret = context->data; 5891da177e4SLinus Torvalds break; 5901da177e4SLinus Torvalds } 5911da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 5921da177e4SLinus Torvalds 5931da177e4SLinus Torvalds return ret; 5941da177e4SLinus Torvalds } 5951da177e4SLinus Torvalds EXPORT_SYMBOL(ib_get_client_data); 5961da177e4SLinus Torvalds 5971da177e4SLinus Torvalds /** 5989cd330d3SKrishna Kumar * ib_set_client_data - Set IB client context 5991da177e4SLinus Torvalds * @device:Device to set context for 6001da177e4SLinus Torvalds * @client:Client to set context for 6011da177e4SLinus Torvalds * @data:Context to set 6021da177e4SLinus Torvalds * 6031da177e4SLinus Torvalds * ib_set_client_data() sets client context that can be retrieved with 6041da177e4SLinus Torvalds * ib_get_client_data(). 6051da177e4SLinus Torvalds */ 6061da177e4SLinus Torvalds void ib_set_client_data(struct ib_device *device, struct ib_client *client, 6071da177e4SLinus Torvalds void *data) 6081da177e4SLinus Torvalds { 6091da177e4SLinus Torvalds struct ib_client_data *context; 6101da177e4SLinus Torvalds unsigned long flags; 6111da177e4SLinus Torvalds 6121da177e4SLinus Torvalds spin_lock_irqsave(&device->client_data_lock, flags); 6131da177e4SLinus Torvalds list_for_each_entry(context, &device->client_data_list, list) 6141da177e4SLinus Torvalds if (context->client == client) { 6151da177e4SLinus Torvalds context->data = data; 6161da177e4SLinus Torvalds goto out; 6171da177e4SLinus Torvalds } 6181da177e4SLinus Torvalds 619aba25a3eSParav Pandit pr_warn("No client context found for %s/%s\n", 6201da177e4SLinus Torvalds device->name, client->name); 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds out: 6231da177e4SLinus Torvalds spin_unlock_irqrestore(&device->client_data_lock, flags); 6241da177e4SLinus Torvalds } 6251da177e4SLinus Torvalds EXPORT_SYMBOL(ib_set_client_data); 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds /** 6281da177e4SLinus Torvalds * ib_register_event_handler - Register an IB event handler 6291da177e4SLinus Torvalds * @event_handler:Handler to register 6301da177e4SLinus Torvalds * 6311da177e4SLinus Torvalds * ib_register_event_handler() registers an event handler that will be 6321da177e4SLinus Torvalds * called back when asynchronous IB events occur (as defined in 6331da177e4SLinus Torvalds * chapter 11 of the InfiniBand Architecture Specification). This 6341da177e4SLinus Torvalds * callback may occur in interrupt context. 6351da177e4SLinus Torvalds */ 6361da177e4SLinus Torvalds int ib_register_event_handler (struct ib_event_handler *event_handler) 6371da177e4SLinus Torvalds { 6381da177e4SLinus Torvalds unsigned long flags; 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); 6411da177e4SLinus Torvalds list_add_tail(&event_handler->list, 6421da177e4SLinus Torvalds &event_handler->device->event_handler_list); 6431da177e4SLinus Torvalds spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); 6441da177e4SLinus Torvalds 6451da177e4SLinus Torvalds return 0; 6461da177e4SLinus Torvalds } 6471da177e4SLinus Torvalds EXPORT_SYMBOL(ib_register_event_handler); 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds /** 6501da177e4SLinus Torvalds * ib_unregister_event_handler - Unregister an event handler 6511da177e4SLinus Torvalds * @event_handler:Handler to unregister 6521da177e4SLinus Torvalds * 6531da177e4SLinus Torvalds * Unregister an event handler registered with 6541da177e4SLinus Torvalds * ib_register_event_handler(). 6551da177e4SLinus Torvalds */ 6561da177e4SLinus Torvalds int ib_unregister_event_handler(struct ib_event_handler *event_handler) 6571da177e4SLinus Torvalds { 6581da177e4SLinus Torvalds unsigned long flags; 6591da177e4SLinus Torvalds 6601da177e4SLinus Torvalds spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); 6611da177e4SLinus Torvalds list_del(&event_handler->list); 6621da177e4SLinus Torvalds spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); 6631da177e4SLinus Torvalds 6641da177e4SLinus Torvalds return 0; 6651da177e4SLinus Torvalds } 6661da177e4SLinus Torvalds EXPORT_SYMBOL(ib_unregister_event_handler); 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds /** 6691da177e4SLinus Torvalds * ib_dispatch_event - Dispatch an asynchronous event 6701da177e4SLinus Torvalds * @event:Event to dispatch 6711da177e4SLinus Torvalds * 6721da177e4SLinus Torvalds * Low-level drivers must call ib_dispatch_event() to dispatch the 6731da177e4SLinus Torvalds * event to all registered event handlers when an asynchronous event 6741da177e4SLinus Torvalds * occurs. 6751da177e4SLinus Torvalds */ 6761da177e4SLinus Torvalds void ib_dispatch_event(struct ib_event *event) 6771da177e4SLinus Torvalds { 6781da177e4SLinus Torvalds unsigned long flags; 6791da177e4SLinus Torvalds struct ib_event_handler *handler; 6801da177e4SLinus Torvalds 6811da177e4SLinus Torvalds spin_lock_irqsave(&event->device->event_handler_lock, flags); 6821da177e4SLinus Torvalds 6831da177e4SLinus Torvalds list_for_each_entry(handler, &event->device->event_handler_list, list) 6841da177e4SLinus Torvalds handler->handler(handler, event); 6851da177e4SLinus Torvalds 6861da177e4SLinus Torvalds spin_unlock_irqrestore(&event->device->event_handler_lock, flags); 6871da177e4SLinus Torvalds } 6881da177e4SLinus Torvalds EXPORT_SYMBOL(ib_dispatch_event); 6891da177e4SLinus Torvalds 6901da177e4SLinus Torvalds /** 6911da177e4SLinus Torvalds * ib_query_port - Query IB port attributes 6921da177e4SLinus Torvalds * @device:Device to query 6931da177e4SLinus Torvalds * @port_num:Port number to query 6941da177e4SLinus Torvalds * @port_attr:Port attributes 6951da177e4SLinus Torvalds * 6961da177e4SLinus Torvalds * ib_query_port() returns the attributes of a port through the 6971da177e4SLinus Torvalds * @port_attr pointer. 6981da177e4SLinus Torvalds */ 6991da177e4SLinus Torvalds int ib_query_port(struct ib_device *device, 7001da177e4SLinus Torvalds u8 port_num, 7011da177e4SLinus Torvalds struct ib_port_attr *port_attr) 7021da177e4SLinus Torvalds { 703fad61ad4SEli Cohen union ib_gid gid; 704fad61ad4SEli Cohen int err; 705fad61ad4SEli Cohen 70624dc831bSYuval Shaia if (!rdma_is_port_valid(device, port_num)) 707116c0074SRoland Dreier return -EINVAL; 708116c0074SRoland Dreier 709fad61ad4SEli Cohen memset(port_attr, 0, sizeof(*port_attr)); 710fad61ad4SEli Cohen err = device->query_port(device, port_num, port_attr); 711fad61ad4SEli Cohen if (err || port_attr->subnet_prefix) 712fad61ad4SEli Cohen return err; 713fad61ad4SEli Cohen 714d7012467SEli Cohen if (rdma_port_get_link_layer(device, port_num) != IB_LINK_LAYER_INFINIBAND) 715d7012467SEli Cohen return 0; 716d7012467SEli Cohen 717fad61ad4SEli Cohen err = ib_query_gid(device, port_num, 0, &gid, NULL); 718fad61ad4SEli Cohen if (err) 719fad61ad4SEli Cohen return err; 720fad61ad4SEli Cohen 721fad61ad4SEli Cohen port_attr->subnet_prefix = be64_to_cpu(gid.global.subnet_prefix); 722fad61ad4SEli Cohen return 0; 7231da177e4SLinus Torvalds } 7241da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_port); 7251da177e4SLinus Torvalds 7261da177e4SLinus Torvalds /** 7271da177e4SLinus Torvalds * ib_query_gid - Get GID table entry 7281da177e4SLinus Torvalds * @device:Device to query 7291da177e4SLinus Torvalds * @port_num:Port number to query 7301da177e4SLinus Torvalds * @index:GID table index to query 7311da177e4SLinus Torvalds * @gid:Returned GID 73255ee3ab2SMatan Barak * @attr: Returned GID attributes related to this GID index (only in RoCE). 73355ee3ab2SMatan Barak * NULL means ignore. 7341da177e4SLinus Torvalds * 7351da177e4SLinus Torvalds * ib_query_gid() fetches the specified GID table entry. 7361da177e4SLinus Torvalds */ 7371da177e4SLinus Torvalds int ib_query_gid(struct ib_device *device, 73855ee3ab2SMatan Barak u8 port_num, int index, union ib_gid *gid, 73955ee3ab2SMatan Barak struct ib_gid_attr *attr) 7401da177e4SLinus Torvalds { 74103db3a2dSMatan Barak if (rdma_cap_roce_gid_table(device, port_num)) 74255ee3ab2SMatan Barak return ib_get_cached_gid(device, port_num, index, gid, attr); 74355ee3ab2SMatan Barak 74455ee3ab2SMatan Barak if (attr) 74555ee3ab2SMatan Barak return -EINVAL; 74603db3a2dSMatan Barak 7471da177e4SLinus Torvalds return device->query_gid(device, port_num, index, gid); 7481da177e4SLinus Torvalds } 7491da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_gid); 7501da177e4SLinus Torvalds 7511da177e4SLinus Torvalds /** 75203db3a2dSMatan Barak * ib_enum_roce_netdev - enumerate all RoCE ports 75303db3a2dSMatan Barak * @ib_dev : IB device we want to query 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 of the physical RoCE ports of ib_dev 76003db3a2dSMatan Barak * which are related to netdevice and calls callback() on each 76103db3a2dSMatan Barak * device for which filter() function returns non zero. 76203db3a2dSMatan Barak */ 76303db3a2dSMatan Barak void ib_enum_roce_netdev(struct ib_device *ib_dev, 76403db3a2dSMatan Barak roce_netdev_filter filter, 76503db3a2dSMatan Barak void *filter_cookie, 76603db3a2dSMatan Barak roce_netdev_callback cb, 76703db3a2dSMatan Barak void *cookie) 76803db3a2dSMatan Barak { 76903db3a2dSMatan Barak u8 port; 77003db3a2dSMatan Barak 77103db3a2dSMatan Barak for (port = rdma_start_port(ib_dev); port <= rdma_end_port(ib_dev); 77203db3a2dSMatan Barak port++) 77303db3a2dSMatan Barak if (rdma_protocol_roce(ib_dev, port)) { 77403db3a2dSMatan Barak struct net_device *idev = NULL; 77503db3a2dSMatan Barak 77603db3a2dSMatan Barak if (ib_dev->get_netdev) 77703db3a2dSMatan Barak idev = ib_dev->get_netdev(ib_dev, port); 77803db3a2dSMatan Barak 77903db3a2dSMatan Barak if (idev && 78003db3a2dSMatan Barak idev->reg_state >= NETREG_UNREGISTERED) { 78103db3a2dSMatan Barak dev_put(idev); 78203db3a2dSMatan Barak idev = NULL; 78303db3a2dSMatan Barak } 78403db3a2dSMatan Barak 78503db3a2dSMatan Barak if (filter(ib_dev, port, idev, filter_cookie)) 78603db3a2dSMatan Barak cb(ib_dev, port, idev, cookie); 78703db3a2dSMatan Barak 78803db3a2dSMatan Barak if (idev) 78903db3a2dSMatan Barak dev_put(idev); 79003db3a2dSMatan Barak } 79103db3a2dSMatan Barak } 79203db3a2dSMatan Barak 79303db3a2dSMatan Barak /** 79403db3a2dSMatan Barak * ib_enum_all_roce_netdevs - enumerate all RoCE devices 79503db3a2dSMatan Barak * @filter: Should we call the callback? 79603db3a2dSMatan Barak * @filter_cookie: Cookie passed to filter 79703db3a2dSMatan Barak * @cb: Callback to call for each found RoCE ports 79803db3a2dSMatan Barak * @cookie: Cookie passed back to the callback 79903db3a2dSMatan Barak * 80003db3a2dSMatan Barak * Enumerates all RoCE devices' physical ports which are related 80103db3a2dSMatan Barak * to netdevices and calls callback() on each device for which 80203db3a2dSMatan Barak * filter() function returns non zero. 80303db3a2dSMatan Barak */ 80403db3a2dSMatan Barak void ib_enum_all_roce_netdevs(roce_netdev_filter filter, 80503db3a2dSMatan Barak void *filter_cookie, 80603db3a2dSMatan Barak roce_netdev_callback cb, 80703db3a2dSMatan Barak void *cookie) 80803db3a2dSMatan Barak { 80903db3a2dSMatan Barak struct ib_device *dev; 81003db3a2dSMatan Barak 81103db3a2dSMatan Barak down_read(&lists_rwsem); 81203db3a2dSMatan Barak list_for_each_entry(dev, &device_list, core_list) 81303db3a2dSMatan Barak ib_enum_roce_netdev(dev, filter, filter_cookie, cb, cookie); 81403db3a2dSMatan Barak up_read(&lists_rwsem); 81503db3a2dSMatan Barak } 81603db3a2dSMatan Barak 81703db3a2dSMatan Barak /** 8181da177e4SLinus Torvalds * ib_query_pkey - Get P_Key table entry 8191da177e4SLinus Torvalds * @device:Device to query 8201da177e4SLinus Torvalds * @port_num:Port number to query 8211da177e4SLinus Torvalds * @index:P_Key table index to query 8221da177e4SLinus Torvalds * @pkey:Returned P_Key 8231da177e4SLinus Torvalds * 8241da177e4SLinus Torvalds * ib_query_pkey() fetches the specified P_Key table entry. 8251da177e4SLinus Torvalds */ 8261da177e4SLinus Torvalds int ib_query_pkey(struct ib_device *device, 8271da177e4SLinus Torvalds u8 port_num, u16 index, u16 *pkey) 8281da177e4SLinus Torvalds { 8291da177e4SLinus Torvalds return device->query_pkey(device, port_num, index, pkey); 8301da177e4SLinus Torvalds } 8311da177e4SLinus Torvalds EXPORT_SYMBOL(ib_query_pkey); 8321da177e4SLinus Torvalds 8331da177e4SLinus Torvalds /** 8341da177e4SLinus Torvalds * ib_modify_device - Change IB device attributes 8351da177e4SLinus Torvalds * @device:Device to modify 8361da177e4SLinus Torvalds * @device_modify_mask:Mask of attributes to change 8371da177e4SLinus Torvalds * @device_modify:New attribute values 8381da177e4SLinus Torvalds * 8391da177e4SLinus Torvalds * ib_modify_device() changes a device's attributes as specified by 8401da177e4SLinus Torvalds * the @device_modify_mask and @device_modify structure. 8411da177e4SLinus Torvalds */ 8421da177e4SLinus Torvalds int ib_modify_device(struct ib_device *device, 8431da177e4SLinus Torvalds int device_modify_mask, 8441da177e4SLinus Torvalds struct ib_device_modify *device_modify) 8451da177e4SLinus Torvalds { 84610e1b54bSBart Van Assche if (!device->modify_device) 84710e1b54bSBart Van Assche return -ENOSYS; 84810e1b54bSBart Van Assche 8491da177e4SLinus Torvalds return device->modify_device(device, device_modify_mask, 8501da177e4SLinus Torvalds device_modify); 8511da177e4SLinus Torvalds } 8521da177e4SLinus Torvalds EXPORT_SYMBOL(ib_modify_device); 8531da177e4SLinus Torvalds 8541da177e4SLinus Torvalds /** 8551da177e4SLinus Torvalds * ib_modify_port - Modifies the attributes for the specified port. 8561da177e4SLinus Torvalds * @device: The device to modify. 8571da177e4SLinus Torvalds * @port_num: The number of the port to modify. 8581da177e4SLinus Torvalds * @port_modify_mask: Mask used to specify which attributes of the port 8591da177e4SLinus Torvalds * to change. 8601da177e4SLinus Torvalds * @port_modify: New attribute values for the port. 8611da177e4SLinus Torvalds * 8621da177e4SLinus Torvalds * ib_modify_port() changes a port's attributes as specified by the 8631da177e4SLinus Torvalds * @port_modify_mask and @port_modify structure. 8641da177e4SLinus Torvalds */ 8651da177e4SLinus Torvalds int ib_modify_port(struct ib_device *device, 8661da177e4SLinus Torvalds u8 port_num, int port_modify_mask, 8671da177e4SLinus Torvalds struct ib_port_modify *port_modify) 8681da177e4SLinus Torvalds { 86910e1b54bSBart Van Assche if (!device->modify_port) 87010e1b54bSBart Van Assche return -ENOSYS; 87110e1b54bSBart Van Assche 87224dc831bSYuval Shaia if (!rdma_is_port_valid(device, port_num)) 873116c0074SRoland Dreier return -EINVAL; 874116c0074SRoland Dreier 8751da177e4SLinus Torvalds return device->modify_port(device, port_num, port_modify_mask, 8761da177e4SLinus Torvalds port_modify); 8771da177e4SLinus Torvalds } 8781da177e4SLinus Torvalds EXPORT_SYMBOL(ib_modify_port); 8791da177e4SLinus Torvalds 8805eb620c8SYosef Etigin /** 8815eb620c8SYosef Etigin * ib_find_gid - Returns the port number and GID table index where 8825eb620c8SYosef Etigin * a specified GID value occurs. 8835eb620c8SYosef Etigin * @device: The device to query. 8845eb620c8SYosef Etigin * @gid: The GID value to search for. 885b39ffa1dSMatan Barak * @gid_type: Type of GID. 88655ee3ab2SMatan Barak * @ndev: The ndev related to the GID to search for. 8875eb620c8SYosef Etigin * @port_num: The port number of the device where the GID value was found. 8885eb620c8SYosef Etigin * @index: The index into the GID table where the GID was found. This 8895eb620c8SYosef Etigin * parameter may be NULL. 8905eb620c8SYosef Etigin */ 8915eb620c8SYosef Etigin int ib_find_gid(struct ib_device *device, union ib_gid *gid, 892b39ffa1dSMatan Barak enum ib_gid_type gid_type, struct net_device *ndev, 893b39ffa1dSMatan Barak u8 *port_num, u16 *index) 8945eb620c8SYosef Etigin { 8955eb620c8SYosef Etigin union ib_gid tmp_gid; 8965eb620c8SYosef Etigin int ret, port, i; 8975eb620c8SYosef Etigin 8980cf18d77SIra Weiny for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) { 89903db3a2dSMatan Barak if (rdma_cap_roce_gid_table(device, port)) { 900b39ffa1dSMatan Barak if (!ib_find_cached_gid_by_port(device, gid, gid_type, port, 90155ee3ab2SMatan Barak ndev, index)) { 90203db3a2dSMatan Barak *port_num = port; 90303db3a2dSMatan Barak return 0; 90403db3a2dSMatan Barak } 90598d25afaSDan Carpenter } 90603db3a2dSMatan Barak 907b39ffa1dSMatan Barak if (gid_type != IB_GID_TYPE_IB) 908b39ffa1dSMatan Barak continue; 909b39ffa1dSMatan Barak 9107738613eSIra Weiny for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) { 91155ee3ab2SMatan Barak ret = ib_query_gid(device, port, i, &tmp_gid, NULL); 9125eb620c8SYosef Etigin if (ret) 9135eb620c8SYosef Etigin return ret; 9145eb620c8SYosef Etigin if (!memcmp(&tmp_gid, gid, sizeof *gid)) { 9155eb620c8SYosef Etigin *port_num = port; 9165eb620c8SYosef Etigin if (index) 9175eb620c8SYosef Etigin *index = i; 9185eb620c8SYosef Etigin return 0; 9195eb620c8SYosef Etigin } 9205eb620c8SYosef Etigin } 9215eb620c8SYosef Etigin } 9225eb620c8SYosef Etigin 9235eb620c8SYosef Etigin return -ENOENT; 9245eb620c8SYosef Etigin } 9255eb620c8SYosef Etigin EXPORT_SYMBOL(ib_find_gid); 9265eb620c8SYosef Etigin 9275eb620c8SYosef Etigin /** 9285eb620c8SYosef Etigin * ib_find_pkey - Returns the PKey table index where a specified 9295eb620c8SYosef Etigin * PKey value occurs. 9305eb620c8SYosef Etigin * @device: The device to query. 9315eb620c8SYosef Etigin * @port_num: The port number of the device to search for the PKey. 9325eb620c8SYosef Etigin * @pkey: The PKey value to search for. 9335eb620c8SYosef Etigin * @index: The index into the PKey table where the PKey was found. 9345eb620c8SYosef Etigin */ 9355eb620c8SYosef Etigin int ib_find_pkey(struct ib_device *device, 9365eb620c8SYosef Etigin u8 port_num, u16 pkey, u16 *index) 9375eb620c8SYosef Etigin { 9385eb620c8SYosef Etigin int ret, i; 9395eb620c8SYosef Etigin u16 tmp_pkey; 940ff7166c4SJack Morgenstein int partial_ix = -1; 9415eb620c8SYosef Etigin 9427738613eSIra Weiny for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) { 9435eb620c8SYosef Etigin ret = ib_query_pkey(device, port_num, i, &tmp_pkey); 9445eb620c8SYosef Etigin if (ret) 9455eb620c8SYosef Etigin return ret; 94636026eccSMoni Shoua if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) { 947ff7166c4SJack Morgenstein /* if there is full-member pkey take it.*/ 948ff7166c4SJack Morgenstein if (tmp_pkey & 0x8000) { 9495eb620c8SYosef Etigin *index = i; 9505eb620c8SYosef Etigin return 0; 9515eb620c8SYosef Etigin } 952ff7166c4SJack Morgenstein if (partial_ix < 0) 953ff7166c4SJack Morgenstein partial_ix = i; 954ff7166c4SJack Morgenstein } 9555eb620c8SYosef Etigin } 9565eb620c8SYosef Etigin 957ff7166c4SJack Morgenstein /*no full-member, if exists take the limited*/ 958ff7166c4SJack Morgenstein if (partial_ix >= 0) { 959ff7166c4SJack Morgenstein *index = partial_ix; 960ff7166c4SJack Morgenstein return 0; 961ff7166c4SJack Morgenstein } 9625eb620c8SYosef Etigin return -ENOENT; 9635eb620c8SYosef Etigin } 9645eb620c8SYosef Etigin EXPORT_SYMBOL(ib_find_pkey); 9655eb620c8SYosef Etigin 9669268f72dSYotam Kenneth /** 9679268f72dSYotam Kenneth * ib_get_net_dev_by_params() - Return the appropriate net_dev 9689268f72dSYotam Kenneth * for a received CM request 9699268f72dSYotam Kenneth * @dev: An RDMA device on which the request has been received. 9709268f72dSYotam Kenneth * @port: Port number on the RDMA device. 9719268f72dSYotam Kenneth * @pkey: The Pkey the request came on. 9729268f72dSYotam Kenneth * @gid: A GID that the net_dev uses to communicate. 9739268f72dSYotam Kenneth * @addr: Contains the IP address that the request specified as its 9749268f72dSYotam Kenneth * destination. 9759268f72dSYotam Kenneth */ 9769268f72dSYotam Kenneth struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, 9779268f72dSYotam Kenneth u8 port, 9789268f72dSYotam Kenneth u16 pkey, 9799268f72dSYotam Kenneth const union ib_gid *gid, 9809268f72dSYotam Kenneth const struct sockaddr *addr) 9819268f72dSYotam Kenneth { 9829268f72dSYotam Kenneth struct net_device *net_dev = NULL; 9839268f72dSYotam Kenneth struct ib_client_data *context; 9849268f72dSYotam Kenneth 9859268f72dSYotam Kenneth if (!rdma_protocol_ib(dev, port)) 9869268f72dSYotam Kenneth return NULL; 9879268f72dSYotam Kenneth 9889268f72dSYotam Kenneth down_read(&lists_rwsem); 9899268f72dSYotam Kenneth 9909268f72dSYotam Kenneth list_for_each_entry(context, &dev->client_data_list, list) { 9919268f72dSYotam Kenneth struct ib_client *client = context->client; 9929268f72dSYotam Kenneth 9939268f72dSYotam Kenneth if (context->going_down) 9949268f72dSYotam Kenneth continue; 9959268f72dSYotam Kenneth 9969268f72dSYotam Kenneth if (client->get_net_dev_by_params) { 9979268f72dSYotam Kenneth net_dev = client->get_net_dev_by_params(dev, port, pkey, 9989268f72dSYotam Kenneth gid, addr, 9999268f72dSYotam Kenneth context->data); 10009268f72dSYotam Kenneth if (net_dev) 10019268f72dSYotam Kenneth break; 10029268f72dSYotam Kenneth } 10039268f72dSYotam Kenneth } 10049268f72dSYotam Kenneth 10059268f72dSYotam Kenneth up_read(&lists_rwsem); 10069268f72dSYotam Kenneth 10079268f72dSYotam Kenneth return net_dev; 10089268f72dSYotam Kenneth } 10099268f72dSYotam Kenneth EXPORT_SYMBOL(ib_get_net_dev_by_params); 10109268f72dSYotam Kenneth 1011735c631aSMark Bloch static struct ibnl_client_cbs ibnl_ls_cb_table[] = { 1012735c631aSMark Bloch [RDMA_NL_LS_OP_RESOLVE] = { 1013735c631aSMark Bloch .dump = ib_nl_handle_resolve_resp, 1014735c631aSMark Bloch .module = THIS_MODULE }, 1015735c631aSMark Bloch [RDMA_NL_LS_OP_SET_TIMEOUT] = { 1016735c631aSMark Bloch .dump = ib_nl_handle_set_timeout, 1017735c631aSMark Bloch .module = THIS_MODULE }, 1018ae43f828SMark Bloch [RDMA_NL_LS_OP_IP_RESOLVE] = { 1019ae43f828SMark Bloch .dump = ib_nl_handle_ip_res_resp, 1020ae43f828SMark Bloch .module = THIS_MODULE }, 1021735c631aSMark Bloch }; 1022735c631aSMark Bloch 1023735c631aSMark Bloch static int ib_add_ibnl_clients(void) 1024735c631aSMark Bloch { 1025735c631aSMark Bloch return ibnl_add_client(RDMA_NL_LS, ARRAY_SIZE(ibnl_ls_cb_table), 1026735c631aSMark Bloch ibnl_ls_cb_table); 1027735c631aSMark Bloch } 1028735c631aSMark Bloch 1029735c631aSMark Bloch static void ib_remove_ibnl_clients(void) 1030735c631aSMark Bloch { 1031735c631aSMark Bloch ibnl_remove_client(RDMA_NL_LS); 1032735c631aSMark Bloch } 1033735c631aSMark Bloch 10341da177e4SLinus Torvalds static int __init ib_core_init(void) 10351da177e4SLinus Torvalds { 10361da177e4SLinus Torvalds int ret; 10371da177e4SLinus Torvalds 1038f0626710STejun Heo ib_wq = alloc_workqueue("infiniband", 0, 0); 1039f0626710STejun Heo if (!ib_wq) 1040f0626710STejun Heo return -ENOMEM; 1041f0626710STejun Heo 104214d3a3b2SChristoph Hellwig ib_comp_wq = alloc_workqueue("ib-comp-wq", 1043b7363e67SSagi Grimberg WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_SYSFS, 0); 104414d3a3b2SChristoph Hellwig if (!ib_comp_wq) { 104514d3a3b2SChristoph Hellwig ret = -ENOMEM; 104614d3a3b2SChristoph Hellwig goto err; 104714d3a3b2SChristoph Hellwig } 104814d3a3b2SChristoph Hellwig 104955aeed06SJason Gunthorpe ret = class_register(&ib_class); 1050fd75c789SNir Muchtar if (ret) { 1051aba25a3eSParav Pandit pr_warn("Couldn't create InfiniBand device class\n"); 105214d3a3b2SChristoph Hellwig goto err_comp; 1053fd75c789SNir Muchtar } 10541da177e4SLinus Torvalds 1055b2cbae2cSRoland Dreier ret = ibnl_init(); 10561da177e4SLinus Torvalds if (ret) { 1057aba25a3eSParav Pandit pr_warn("Couldn't init IB netlink interface\n"); 1058fd75c789SNir Muchtar goto err_sysfs; 10591da177e4SLinus Torvalds } 10601da177e4SLinus Torvalds 1061e3f20f02SLeon Romanovsky ret = addr_init(); 1062e3f20f02SLeon Romanovsky if (ret) { 1063e3f20f02SLeon Romanovsky pr_warn("Could't init IB address resolution\n"); 1064e3f20f02SLeon Romanovsky goto err_ibnl; 1065e3f20f02SLeon Romanovsky } 1066e3f20f02SLeon Romanovsky 10674c2cb422SMark Bloch ret = ib_mad_init(); 10684c2cb422SMark Bloch if (ret) { 10694c2cb422SMark Bloch pr_warn("Couldn't init IB MAD\n"); 10704c2cb422SMark Bloch goto err_addr; 10714c2cb422SMark Bloch } 10724c2cb422SMark Bloch 1073c2e49c92SMark Bloch ret = ib_sa_init(); 1074c2e49c92SMark Bloch if (ret) { 1075c2e49c92SMark Bloch pr_warn("Couldn't init SA\n"); 1076c2e49c92SMark Bloch goto err_mad; 1077c2e49c92SMark Bloch } 1078c2e49c92SMark Bloch 1079da1f857bSDan Carpenter ret = ib_add_ibnl_clients(); 1080da1f857bSDan Carpenter if (ret) { 1081735c631aSMark Bloch pr_warn("Couldn't register ibnl clients\n"); 1082735c631aSMark Bloch goto err_sa; 1083735c631aSMark Bloch } 1084735c631aSMark Bloch 108503db3a2dSMatan Barak ib_cache_setup(); 1086b2cbae2cSRoland Dreier 1087fd75c789SNir Muchtar return 0; 1088fd75c789SNir Muchtar 1089735c631aSMark Bloch err_sa: 1090735c631aSMark Bloch ib_sa_cleanup(); 1091c2e49c92SMark Bloch err_mad: 1092c2e49c92SMark Bloch ib_mad_cleanup(); 10934c2cb422SMark Bloch err_addr: 10944c2cb422SMark Bloch addr_cleanup(); 1095e3f20f02SLeon Romanovsky err_ibnl: 1096e3f20f02SLeon Romanovsky ibnl_cleanup(); 1097fd75c789SNir Muchtar err_sysfs: 109855aeed06SJason Gunthorpe class_unregister(&ib_class); 109914d3a3b2SChristoph Hellwig err_comp: 110014d3a3b2SChristoph Hellwig destroy_workqueue(ib_comp_wq); 1101fd75c789SNir Muchtar err: 1102fd75c789SNir Muchtar destroy_workqueue(ib_wq); 11031da177e4SLinus Torvalds return ret; 11041da177e4SLinus Torvalds } 11051da177e4SLinus Torvalds 11061da177e4SLinus Torvalds static void __exit ib_core_cleanup(void) 11071da177e4SLinus Torvalds { 11081da177e4SLinus Torvalds ib_cache_cleanup(); 1109735c631aSMark Bloch ib_remove_ibnl_clients(); 1110c2e49c92SMark Bloch ib_sa_cleanup(); 11114c2cb422SMark Bloch ib_mad_cleanup(); 1112e3f20f02SLeon Romanovsky addr_cleanup(); 1113b2cbae2cSRoland Dreier ibnl_cleanup(); 111455aeed06SJason Gunthorpe class_unregister(&ib_class); 111514d3a3b2SChristoph Hellwig destroy_workqueue(ib_comp_wq); 1116f7c6a7b5SRoland Dreier /* Make sure that any pending umem accounting work is done. */ 1117f0626710STejun Heo destroy_workqueue(ib_wq); 11181da177e4SLinus Torvalds } 11191da177e4SLinus Torvalds 11201da177e4SLinus Torvalds module_init(ib_core_init); 11211da177e4SLinus Torvalds module_exit(ib_core_cleanup); 1122