Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004 Topspin Communications. All rights reserved. |
Roland Dreier | 2a1d9b7 | 2005-08-10 23:03:10 -0700 | [diff] [blame] | 3 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
| 5 | * This software is available to you under a choice of one of two |
| 6 | * licenses. You may choose to be licensed under the terms of the GNU |
| 7 | * General Public License (GPL) Version 2, available from the file |
| 8 | * COPYING in the main directory of this source tree, or the |
| 9 | * OpenIB.org BSD license below: |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or |
| 12 | * without modification, are permitted provided that the following |
| 13 | * conditions are met: |
| 14 | * |
| 15 | * - Redistributions of source code must retain the above |
| 16 | * copyright notice, this list of conditions and the following |
| 17 | * disclaimer. |
| 18 | * |
| 19 | * - Redistributions in binary form must reproduce the above |
| 20 | * copyright notice, this list of conditions and the following |
| 21 | * disclaimer in the documentation and/or other materials |
| 22 | * provided with the distribution. |
| 23 | * |
| 24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 31 | * SOFTWARE. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | */ |
| 33 | |
| 34 | #include <linux/module.h> |
| 35 | #include <linux/string.h> |
| 36 | #include <linux/errno.h> |
Ahmed S. Darwish | 9a6b090 | 2007-02-06 18:07:25 +0200 | [diff] [blame] | 37 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/slab.h> |
| 39 | #include <linux/init.h> |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 40 | #include <linux/mutex.h> |
Roland Dreier | b2cbae2 | 2011-05-20 11:46:11 -0700 | [diff] [blame] | 41 | #include <rdma/rdma_netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
| 43 | #include "core_priv.h" |
| 44 | |
| 45 | MODULE_AUTHOR("Roland Dreier"); |
| 46 | MODULE_DESCRIPTION("core kernel InfiniBand API"); |
| 47 | MODULE_LICENSE("Dual BSD/GPL"); |
| 48 | |
| 49 | struct ib_client_data { |
| 50 | struct list_head list; |
| 51 | struct ib_client *client; |
| 52 | void * data; |
| 53 | }; |
| 54 | |
Tejun Heo | f062671 | 2010-10-19 15:24:36 +0000 | [diff] [blame] | 55 | struct workqueue_struct *ib_wq; |
| 56 | EXPORT_SYMBOL_GPL(ib_wq); |
| 57 | |
Haggai Eran | 5aa44bb | 2015-07-30 17:50:13 +0300 | [diff] [blame^] | 58 | /* The device_list and client_list contain devices and clients after their |
| 59 | * registration has completed, and the devices and clients are removed |
| 60 | * during unregistration. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | static LIST_HEAD(device_list); |
| 62 | static LIST_HEAD(client_list); |
| 63 | |
| 64 | /* |
Haggai Eran | 5aa44bb | 2015-07-30 17:50:13 +0300 | [diff] [blame^] | 65 | * device_mutex and lists_rwsem protect access to both device_list and |
| 66 | * client_list. device_mutex protects writer access by device and client |
| 67 | * registration / de-registration. lists_rwsem protects reader access to |
| 68 | * these lists. Iterators of these lists must lock it for read, while updates |
| 69 | * to the lists must be done with a write lock. A special case is when the |
| 70 | * device_mutex is locked. In this case locking the lists for read access is |
| 71 | * not necessary as the device_mutex implies it. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | */ |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 73 | static DEFINE_MUTEX(device_mutex); |
Haggai Eran | 5aa44bb | 2015-07-30 17:50:13 +0300 | [diff] [blame^] | 74 | static DECLARE_RWSEM(lists_rwsem); |
| 75 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
| 77 | static int ib_device_check_mandatory(struct ib_device *device) |
| 78 | { |
| 79 | #define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x } |
| 80 | static const struct { |
| 81 | size_t offset; |
| 82 | char *name; |
| 83 | } mandatory_table[] = { |
| 84 | IB_MANDATORY_FUNC(query_device), |
| 85 | IB_MANDATORY_FUNC(query_port), |
| 86 | IB_MANDATORY_FUNC(query_pkey), |
| 87 | IB_MANDATORY_FUNC(query_gid), |
| 88 | IB_MANDATORY_FUNC(alloc_pd), |
| 89 | IB_MANDATORY_FUNC(dealloc_pd), |
| 90 | IB_MANDATORY_FUNC(create_ah), |
| 91 | IB_MANDATORY_FUNC(destroy_ah), |
| 92 | IB_MANDATORY_FUNC(create_qp), |
| 93 | IB_MANDATORY_FUNC(modify_qp), |
| 94 | IB_MANDATORY_FUNC(destroy_qp), |
| 95 | IB_MANDATORY_FUNC(post_send), |
| 96 | IB_MANDATORY_FUNC(post_recv), |
| 97 | IB_MANDATORY_FUNC(create_cq), |
| 98 | IB_MANDATORY_FUNC(destroy_cq), |
| 99 | IB_MANDATORY_FUNC(poll_cq), |
| 100 | IB_MANDATORY_FUNC(req_notify_cq), |
| 101 | IB_MANDATORY_FUNC(get_dma_mr), |
Ira Weiny | 7738613 | 2015-05-13 20:02:58 -0400 | [diff] [blame] | 102 | IB_MANDATORY_FUNC(dereg_mr), |
| 103 | IB_MANDATORY_FUNC(get_port_immutable) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | }; |
| 105 | int i; |
| 106 | |
Ahmed S. Darwish | 9a6b090 | 2007-02-06 18:07:25 +0200 | [diff] [blame] | 107 | for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | if (!*(void **) ((void *) device + mandatory_table[i].offset)) { |
| 109 | printk(KERN_WARNING "Device %s is missing mandatory function %s\n", |
| 110 | device->name, mandatory_table[i].name); |
| 111 | return -EINVAL; |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | return 0; |
| 116 | } |
| 117 | |
| 118 | static struct ib_device *__ib_device_get_by_name(const char *name) |
| 119 | { |
| 120 | struct ib_device *device; |
| 121 | |
| 122 | list_for_each_entry(device, &device_list, core_list) |
| 123 | if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX)) |
| 124 | return device; |
| 125 | |
| 126 | return NULL; |
| 127 | } |
| 128 | |
| 129 | |
| 130 | static int alloc_name(char *name) |
| 131 | { |
Roland Dreier | 65d470b | 2007-10-09 19:59:04 -0700 | [diff] [blame] | 132 | unsigned long *inuse; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | char buf[IB_DEVICE_NAME_MAX]; |
| 134 | struct ib_device *device; |
| 135 | int i; |
| 136 | |
Roland Dreier | 65d470b | 2007-10-09 19:59:04 -0700 | [diff] [blame] | 137 | inuse = (unsigned long *) get_zeroed_page(GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | if (!inuse) |
| 139 | return -ENOMEM; |
| 140 | |
| 141 | list_for_each_entry(device, &device_list, core_list) { |
| 142 | if (!sscanf(device->name, name, &i)) |
| 143 | continue; |
| 144 | if (i < 0 || i >= PAGE_SIZE * 8) |
| 145 | continue; |
| 146 | snprintf(buf, sizeof buf, name, i); |
| 147 | if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX)) |
| 148 | set_bit(i, inuse); |
| 149 | } |
| 150 | |
| 151 | i = find_first_zero_bit(inuse, PAGE_SIZE * 8); |
| 152 | free_page((unsigned long) inuse); |
| 153 | snprintf(buf, sizeof buf, name, i); |
| 154 | |
| 155 | if (__ib_device_get_by_name(buf)) |
| 156 | return -ENFILE; |
| 157 | |
| 158 | strlcpy(name, buf, IB_DEVICE_NAME_MAX); |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * ib_alloc_device - allocate an IB device struct |
| 164 | * @size:size of structure to allocate |
| 165 | * |
| 166 | * Low-level drivers should use ib_alloc_device() to allocate &struct |
| 167 | * ib_device. @size is the size of the structure to be allocated, |
| 168 | * including any private data used by the low-level driver. |
| 169 | * ib_dealloc_device() must be used to free structures allocated with |
| 170 | * ib_alloc_device(). |
| 171 | */ |
| 172 | struct ib_device *ib_alloc_device(size_t size) |
| 173 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | BUG_ON(size < sizeof (struct ib_device)); |
| 175 | |
Roland Dreier | de6eb66 | 2005-11-02 07:23:14 -0800 | [diff] [blame] | 176 | return kzalloc(size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | } |
| 178 | EXPORT_SYMBOL(ib_alloc_device); |
| 179 | |
| 180 | /** |
| 181 | * ib_dealloc_device - free an IB device struct |
| 182 | * @device:structure to free |
| 183 | * |
| 184 | * Free a structure allocated with ib_alloc_device(). |
| 185 | */ |
| 186 | void ib_dealloc_device(struct ib_device *device) |
| 187 | { |
| 188 | if (device->reg_state == IB_DEV_UNINITIALIZED) { |
| 189 | kfree(device); |
| 190 | return; |
| 191 | } |
| 192 | |
| 193 | BUG_ON(device->reg_state != IB_DEV_UNREGISTERED); |
| 194 | |
Roland Dreier | 9206dff | 2009-02-25 13:27:46 -0800 | [diff] [blame] | 195 | kobject_put(&device->dev.kobj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | } |
| 197 | EXPORT_SYMBOL(ib_dealloc_device); |
| 198 | |
| 199 | static int add_client_context(struct ib_device *device, struct ib_client *client) |
| 200 | { |
| 201 | struct ib_client_data *context; |
| 202 | unsigned long flags; |
| 203 | |
| 204 | context = kmalloc(sizeof *context, GFP_KERNEL); |
| 205 | if (!context) { |
| 206 | printk(KERN_WARNING "Couldn't allocate client context for %s/%s\n", |
| 207 | device->name, client->name); |
| 208 | return -ENOMEM; |
| 209 | } |
| 210 | |
| 211 | context->client = client; |
| 212 | context->data = NULL; |
| 213 | |
| 214 | spin_lock_irqsave(&device->client_data_lock, flags); |
| 215 | list_add(&context->list, &device->client_data_list); |
| 216 | spin_unlock_irqrestore(&device->client_data_lock, flags); |
| 217 | |
| 218 | return 0; |
| 219 | } |
| 220 | |
Ira Weiny | 337877a | 2015-06-06 14:38:29 -0400 | [diff] [blame] | 221 | static int verify_immutable(const struct ib_device *dev, u8 port) |
| 222 | { |
| 223 | return WARN_ON(!rdma_cap_ib_mad(dev, port) && |
| 224 | rdma_max_mad_size(dev, port) != 0); |
| 225 | } |
| 226 | |
Ira Weiny | 7738613 | 2015-05-13 20:02:58 -0400 | [diff] [blame] | 227 | static int read_port_immutable(struct ib_device *device) |
Yosef Etigin | 5eb620c | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 228 | { |
Ira Weiny | 7738613 | 2015-05-13 20:02:58 -0400 | [diff] [blame] | 229 | int ret = -ENOMEM; |
| 230 | u8 start_port = rdma_start_port(device); |
| 231 | u8 end_port = rdma_end_port(device); |
| 232 | u8 port; |
Yosef Etigin | 5eb620c | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 233 | |
Ira Weiny | 7738613 | 2015-05-13 20:02:58 -0400 | [diff] [blame] | 234 | /** |
| 235 | * device->port_immutable is indexed directly by the port number to make |
| 236 | * access to this data as efficient as possible. |
| 237 | * |
| 238 | * Therefore port_immutable is declared as a 1 based array with |
| 239 | * potential empty slots at the beginning. |
| 240 | */ |
| 241 | device->port_immutable = kzalloc(sizeof(*device->port_immutable) |
| 242 | * (end_port + 1), |
| 243 | GFP_KERNEL); |
| 244 | if (!device->port_immutable) |
Yosef Etigin | 5eb620c | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 245 | goto err; |
| 246 | |
Ira Weiny | 7738613 | 2015-05-13 20:02:58 -0400 | [diff] [blame] | 247 | for (port = start_port; port <= end_port; ++port) { |
| 248 | ret = device->get_port_immutable(device, port, |
| 249 | &device->port_immutable[port]); |
Yosef Etigin | 5eb620c | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 250 | if (ret) |
| 251 | goto err; |
Ira Weiny | 337877a | 2015-06-06 14:38:29 -0400 | [diff] [blame] | 252 | |
| 253 | if (verify_immutable(device, port)) { |
| 254 | ret = -EINVAL; |
| 255 | goto err; |
| 256 | } |
Yosef Etigin | 5eb620c | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 257 | } |
| 258 | |
| 259 | ret = 0; |
| 260 | goto out; |
Yosef Etigin | 5eb620c | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 261 | err: |
Ira Weiny | 7738613 | 2015-05-13 20:02:58 -0400 | [diff] [blame] | 262 | kfree(device->port_immutable); |
Yosef Etigin | 5eb620c | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 263 | out: |
Yosef Etigin | 5eb620c | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 264 | return ret; |
| 265 | } |
| 266 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | /** |
| 268 | * ib_register_device - Register an IB device with IB core |
| 269 | * @device:Device to register |
| 270 | * |
| 271 | * Low-level drivers use ib_register_device() to register their |
| 272 | * devices with the IB core. All registered clients will receive a |
| 273 | * callback for each device that is added. @device must be allocated |
| 274 | * with ib_alloc_device(). |
| 275 | */ |
Ralph Campbell | 9a6edb6 | 2010-05-06 17:03:25 -0700 | [diff] [blame] | 276 | int ib_register_device(struct ib_device *device, |
| 277 | int (*port_callback)(struct ib_device *, |
| 278 | u8, struct kobject *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | { |
| 280 | int ret; |
| 281 | |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 282 | mutex_lock(&device_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | |
| 284 | if (strchr(device->name, '%')) { |
| 285 | ret = alloc_name(device->name); |
| 286 | if (ret) |
| 287 | goto out; |
| 288 | } |
| 289 | |
| 290 | if (ib_device_check_mandatory(device)) { |
| 291 | ret = -EINVAL; |
| 292 | goto out; |
| 293 | } |
| 294 | |
| 295 | INIT_LIST_HEAD(&device->event_handler_list); |
| 296 | INIT_LIST_HEAD(&device->client_data_list); |
| 297 | spin_lock_init(&device->event_handler_lock); |
| 298 | spin_lock_init(&device->client_data_lock); |
| 299 | |
Ira Weiny | 7738613 | 2015-05-13 20:02:58 -0400 | [diff] [blame] | 300 | ret = read_port_immutable(device); |
Yosef Etigin | 5eb620c | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 301 | if (ret) { |
Ira Weiny | 7738613 | 2015-05-13 20:02:58 -0400 | [diff] [blame] | 302 | printk(KERN_WARNING "Couldn't create per port immutable data %s\n", |
Yosef Etigin | 5eb620c | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 303 | device->name); |
| 304 | goto out; |
| 305 | } |
| 306 | |
Ralph Campbell | 9a6edb6 | 2010-05-06 17:03:25 -0700 | [diff] [blame] | 307 | ret = ib_device_register_sysfs(device, port_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | if (ret) { |
| 309 | printk(KERN_WARNING "Couldn't register device %s with driver model\n", |
| 310 | device->name); |
Ira Weiny | 7738613 | 2015-05-13 20:02:58 -0400 | [diff] [blame] | 311 | kfree(device->port_immutable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | goto out; |
| 313 | } |
| 314 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | device->reg_state = IB_DEV_REGISTERED; |
| 316 | |
| 317 | { |
| 318 | struct ib_client *client; |
| 319 | |
| 320 | list_for_each_entry(client, &client_list, list) |
| 321 | if (client->add && !add_client_context(device, client)) |
| 322 | client->add(device); |
| 323 | } |
| 324 | |
Haggai Eran | 5aa44bb | 2015-07-30 17:50:13 +0300 | [diff] [blame^] | 325 | down_write(&lists_rwsem); |
| 326 | list_add_tail(&device->core_list, &device_list); |
| 327 | up_write(&lists_rwsem); |
| 328 | out: |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 329 | mutex_unlock(&device_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | return ret; |
| 331 | } |
| 332 | EXPORT_SYMBOL(ib_register_device); |
| 333 | |
| 334 | /** |
| 335 | * ib_unregister_device - Unregister an IB device |
| 336 | * @device:Device to unregister |
| 337 | * |
| 338 | * Unregister an IB device. All clients will receive a remove callback. |
| 339 | */ |
| 340 | void ib_unregister_device(struct ib_device *device) |
| 341 | { |
| 342 | struct ib_client *client; |
| 343 | struct ib_client_data *context, *tmp; |
| 344 | unsigned long flags; |
| 345 | |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 346 | mutex_lock(&device_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | |
Haggai Eran | 5aa44bb | 2015-07-30 17:50:13 +0300 | [diff] [blame^] | 348 | down_write(&lists_rwsem); |
| 349 | list_del(&device->core_list); |
| 350 | up_write(&lists_rwsem); |
| 351 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | list_for_each_entry_reverse(client, &client_list, list) |
| 353 | if (client->remove) |
| 354 | client->remove(device); |
| 355 | |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 356 | mutex_unlock(&device_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | |
Roland Dreier | 9206dff | 2009-02-25 13:27:46 -0800 | [diff] [blame] | 358 | ib_device_unregister_sysfs(device); |
| 359 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | spin_lock_irqsave(&device->client_data_lock, flags); |
| 361 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) |
| 362 | kfree(context); |
| 363 | spin_unlock_irqrestore(&device->client_data_lock, flags); |
| 364 | |
| 365 | device->reg_state = IB_DEV_UNREGISTERED; |
| 366 | } |
| 367 | EXPORT_SYMBOL(ib_unregister_device); |
| 368 | |
| 369 | /** |
| 370 | * ib_register_client - Register an IB client |
| 371 | * @client:Client to register |
| 372 | * |
| 373 | * Upper level users of the IB drivers can use ib_register_client() to |
| 374 | * register callbacks for IB device addition and removal. When an IB |
| 375 | * device is added, each registered client's add method will be called |
| 376 | * (in the order the clients were registered), and when a device is |
| 377 | * removed, each client's remove method will be called (in the reverse |
| 378 | * order that clients were registered). In addition, when |
| 379 | * ib_register_client() is called, the client will receive an add |
| 380 | * callback for all devices already registered. |
| 381 | */ |
| 382 | int ib_register_client(struct ib_client *client) |
| 383 | { |
| 384 | struct ib_device *device; |
| 385 | |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 386 | mutex_lock(&device_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | list_for_each_entry(device, &device_list, core_list) |
| 389 | if (client->add && !add_client_context(device, client)) |
| 390 | client->add(device); |
| 391 | |
Haggai Eran | 5aa44bb | 2015-07-30 17:50:13 +0300 | [diff] [blame^] | 392 | down_write(&lists_rwsem); |
| 393 | list_add_tail(&client->list, &client_list); |
| 394 | up_write(&lists_rwsem); |
| 395 | |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 396 | mutex_unlock(&device_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | |
| 398 | return 0; |
| 399 | } |
| 400 | EXPORT_SYMBOL(ib_register_client); |
| 401 | |
| 402 | /** |
| 403 | * ib_unregister_client - Unregister an IB client |
| 404 | * @client:Client to unregister |
| 405 | * |
| 406 | * Upper level users use ib_unregister_client() to remove their client |
| 407 | * registration. When ib_unregister_client() is called, the client |
| 408 | * will receive a remove callback for each IB device still registered. |
| 409 | */ |
| 410 | void ib_unregister_client(struct ib_client *client) |
| 411 | { |
| 412 | struct ib_client_data *context, *tmp; |
| 413 | struct ib_device *device; |
| 414 | unsigned long flags; |
| 415 | |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 416 | mutex_lock(&device_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | |
Haggai Eran | 5aa44bb | 2015-07-30 17:50:13 +0300 | [diff] [blame^] | 418 | down_write(&lists_rwsem); |
| 419 | list_del(&client->list); |
| 420 | up_write(&lists_rwsem); |
| 421 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | list_for_each_entry(device, &device_list, core_list) { |
| 423 | if (client->remove) |
| 424 | client->remove(device); |
| 425 | |
| 426 | spin_lock_irqsave(&device->client_data_lock, flags); |
| 427 | list_for_each_entry_safe(context, tmp, &device->client_data_list, list) |
| 428 | if (context->client == client) { |
| 429 | list_del(&context->list); |
| 430 | kfree(context); |
| 431 | } |
| 432 | spin_unlock_irqrestore(&device->client_data_lock, flags); |
| 433 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | |
Ingo Molnar | 95ed644 | 2006-01-13 14:51:39 -0800 | [diff] [blame] | 435 | mutex_unlock(&device_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | } |
| 437 | EXPORT_SYMBOL(ib_unregister_client); |
| 438 | |
| 439 | /** |
| 440 | * ib_get_client_data - Get IB client context |
| 441 | * @device:Device to get context for |
| 442 | * @client:Client to get context for |
| 443 | * |
| 444 | * ib_get_client_data() returns client context set with |
| 445 | * ib_set_client_data(). |
| 446 | */ |
| 447 | void *ib_get_client_data(struct ib_device *device, struct ib_client *client) |
| 448 | { |
| 449 | struct ib_client_data *context; |
| 450 | void *ret = NULL; |
| 451 | unsigned long flags; |
| 452 | |
| 453 | spin_lock_irqsave(&device->client_data_lock, flags); |
| 454 | list_for_each_entry(context, &device->client_data_list, list) |
| 455 | if (context->client == client) { |
| 456 | ret = context->data; |
| 457 | break; |
| 458 | } |
| 459 | spin_unlock_irqrestore(&device->client_data_lock, flags); |
| 460 | |
| 461 | return ret; |
| 462 | } |
| 463 | EXPORT_SYMBOL(ib_get_client_data); |
| 464 | |
| 465 | /** |
Krishna Kumar | 9cd330d | 2006-09-22 15:22:58 -0700 | [diff] [blame] | 466 | * ib_set_client_data - Set IB client context |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | * @device:Device to set context for |
| 468 | * @client:Client to set context for |
| 469 | * @data:Context to set |
| 470 | * |
| 471 | * ib_set_client_data() sets client context that can be retrieved with |
| 472 | * ib_get_client_data(). |
| 473 | */ |
| 474 | void ib_set_client_data(struct ib_device *device, struct ib_client *client, |
| 475 | void *data) |
| 476 | { |
| 477 | struct ib_client_data *context; |
| 478 | unsigned long flags; |
| 479 | |
| 480 | spin_lock_irqsave(&device->client_data_lock, flags); |
| 481 | list_for_each_entry(context, &device->client_data_list, list) |
| 482 | if (context->client == client) { |
| 483 | context->data = data; |
| 484 | goto out; |
| 485 | } |
| 486 | |
| 487 | printk(KERN_WARNING "No client context found for %s/%s\n", |
| 488 | device->name, client->name); |
| 489 | |
| 490 | out: |
| 491 | spin_unlock_irqrestore(&device->client_data_lock, flags); |
| 492 | } |
| 493 | EXPORT_SYMBOL(ib_set_client_data); |
| 494 | |
| 495 | /** |
| 496 | * ib_register_event_handler - Register an IB event handler |
| 497 | * @event_handler:Handler to register |
| 498 | * |
| 499 | * ib_register_event_handler() registers an event handler that will be |
| 500 | * called back when asynchronous IB events occur (as defined in |
| 501 | * chapter 11 of the InfiniBand Architecture Specification). This |
| 502 | * callback may occur in interrupt context. |
| 503 | */ |
| 504 | int ib_register_event_handler (struct ib_event_handler *event_handler) |
| 505 | { |
| 506 | unsigned long flags; |
| 507 | |
| 508 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); |
| 509 | list_add_tail(&event_handler->list, |
| 510 | &event_handler->device->event_handler_list); |
| 511 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); |
| 512 | |
| 513 | return 0; |
| 514 | } |
| 515 | EXPORT_SYMBOL(ib_register_event_handler); |
| 516 | |
| 517 | /** |
| 518 | * ib_unregister_event_handler - Unregister an event handler |
| 519 | * @event_handler:Handler to unregister |
| 520 | * |
| 521 | * Unregister an event handler registered with |
| 522 | * ib_register_event_handler(). |
| 523 | */ |
| 524 | int ib_unregister_event_handler(struct ib_event_handler *event_handler) |
| 525 | { |
| 526 | unsigned long flags; |
| 527 | |
| 528 | spin_lock_irqsave(&event_handler->device->event_handler_lock, flags); |
| 529 | list_del(&event_handler->list); |
| 530 | spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags); |
| 531 | |
| 532 | return 0; |
| 533 | } |
| 534 | EXPORT_SYMBOL(ib_unregister_event_handler); |
| 535 | |
| 536 | /** |
| 537 | * ib_dispatch_event - Dispatch an asynchronous event |
| 538 | * @event:Event to dispatch |
| 539 | * |
| 540 | * Low-level drivers must call ib_dispatch_event() to dispatch the |
| 541 | * event to all registered event handlers when an asynchronous event |
| 542 | * occurs. |
| 543 | */ |
| 544 | void ib_dispatch_event(struct ib_event *event) |
| 545 | { |
| 546 | unsigned long flags; |
| 547 | struct ib_event_handler *handler; |
| 548 | |
| 549 | spin_lock_irqsave(&event->device->event_handler_lock, flags); |
| 550 | |
| 551 | list_for_each_entry(handler, &event->device->event_handler_list, list) |
| 552 | handler->handler(handler, event); |
| 553 | |
| 554 | spin_unlock_irqrestore(&event->device->event_handler_lock, flags); |
| 555 | } |
| 556 | EXPORT_SYMBOL(ib_dispatch_event); |
| 557 | |
| 558 | /** |
| 559 | * ib_query_device - Query IB device attributes |
| 560 | * @device:Device to query |
| 561 | * @device_attr:Device attributes |
| 562 | * |
| 563 | * ib_query_device() returns the attributes of a device through the |
| 564 | * @device_attr pointer. |
| 565 | */ |
| 566 | int ib_query_device(struct ib_device *device, |
| 567 | struct ib_device_attr *device_attr) |
| 568 | { |
Matan Barak | 2528e33 | 2015-06-11 16:35:25 +0300 | [diff] [blame] | 569 | struct ib_udata uhw = {.outlen = 0, .inlen = 0}; |
| 570 | |
Matan Barak | 24306dc | 2015-06-11 16:35:24 +0300 | [diff] [blame] | 571 | memset(device_attr, 0, sizeof(*device_attr)); |
| 572 | |
Matan Barak | 2528e33 | 2015-06-11 16:35:25 +0300 | [diff] [blame] | 573 | return device->query_device(device, device_attr, &uhw); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | } |
| 575 | EXPORT_SYMBOL(ib_query_device); |
| 576 | |
| 577 | /** |
| 578 | * ib_query_port - Query IB port attributes |
| 579 | * @device:Device to query |
| 580 | * @port_num:Port number to query |
| 581 | * @port_attr:Port attributes |
| 582 | * |
| 583 | * ib_query_port() returns the attributes of a port through the |
| 584 | * @port_attr pointer. |
| 585 | */ |
| 586 | int ib_query_port(struct ib_device *device, |
| 587 | u8 port_num, |
| 588 | struct ib_port_attr *port_attr) |
| 589 | { |
Ira Weiny | 0cf18d7 | 2015-05-13 20:02:55 -0400 | [diff] [blame] | 590 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
Roland Dreier | 116c007 | 2005-10-03 09:32:33 -0700 | [diff] [blame] | 591 | return -EINVAL; |
| 592 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | return device->query_port(device, port_num, port_attr); |
| 594 | } |
| 595 | EXPORT_SYMBOL(ib_query_port); |
| 596 | |
| 597 | /** |
| 598 | * ib_query_gid - Get GID table entry |
| 599 | * @device:Device to query |
| 600 | * @port_num:Port number to query |
| 601 | * @index:GID table index to query |
| 602 | * @gid:Returned GID |
| 603 | * |
| 604 | * ib_query_gid() fetches the specified GID table entry. |
| 605 | */ |
| 606 | int ib_query_gid(struct ib_device *device, |
| 607 | u8 port_num, int index, union ib_gid *gid) |
| 608 | { |
| 609 | return device->query_gid(device, port_num, index, gid); |
| 610 | } |
| 611 | EXPORT_SYMBOL(ib_query_gid); |
| 612 | |
| 613 | /** |
| 614 | * ib_query_pkey - Get P_Key table entry |
| 615 | * @device:Device to query |
| 616 | * @port_num:Port number to query |
| 617 | * @index:P_Key table index to query |
| 618 | * @pkey:Returned P_Key |
| 619 | * |
| 620 | * ib_query_pkey() fetches the specified P_Key table entry. |
| 621 | */ |
| 622 | int ib_query_pkey(struct ib_device *device, |
| 623 | u8 port_num, u16 index, u16 *pkey) |
| 624 | { |
| 625 | return device->query_pkey(device, port_num, index, pkey); |
| 626 | } |
| 627 | EXPORT_SYMBOL(ib_query_pkey); |
| 628 | |
| 629 | /** |
| 630 | * ib_modify_device - Change IB device attributes |
| 631 | * @device:Device to modify |
| 632 | * @device_modify_mask:Mask of attributes to change |
| 633 | * @device_modify:New attribute values |
| 634 | * |
| 635 | * ib_modify_device() changes a device's attributes as specified by |
| 636 | * the @device_modify_mask and @device_modify structure. |
| 637 | */ |
| 638 | int ib_modify_device(struct ib_device *device, |
| 639 | int device_modify_mask, |
| 640 | struct ib_device_modify *device_modify) |
| 641 | { |
Bart Van Assche | 10e1b54 | 2011-06-18 16:35:42 +0000 | [diff] [blame] | 642 | if (!device->modify_device) |
| 643 | return -ENOSYS; |
| 644 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | return device->modify_device(device, device_modify_mask, |
| 646 | device_modify); |
| 647 | } |
| 648 | EXPORT_SYMBOL(ib_modify_device); |
| 649 | |
| 650 | /** |
| 651 | * ib_modify_port - Modifies the attributes for the specified port. |
| 652 | * @device: The device to modify. |
| 653 | * @port_num: The number of the port to modify. |
| 654 | * @port_modify_mask: Mask used to specify which attributes of the port |
| 655 | * to change. |
| 656 | * @port_modify: New attribute values for the port. |
| 657 | * |
| 658 | * ib_modify_port() changes a port's attributes as specified by the |
| 659 | * @port_modify_mask and @port_modify structure. |
| 660 | */ |
| 661 | int ib_modify_port(struct ib_device *device, |
| 662 | u8 port_num, int port_modify_mask, |
| 663 | struct ib_port_modify *port_modify) |
| 664 | { |
Bart Van Assche | 10e1b54 | 2011-06-18 16:35:42 +0000 | [diff] [blame] | 665 | if (!device->modify_port) |
| 666 | return -ENOSYS; |
| 667 | |
Ira Weiny | 0cf18d7 | 2015-05-13 20:02:55 -0400 | [diff] [blame] | 668 | if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) |
Roland Dreier | 116c007 | 2005-10-03 09:32:33 -0700 | [diff] [blame] | 669 | return -EINVAL; |
| 670 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | return device->modify_port(device, port_num, port_modify_mask, |
| 672 | port_modify); |
| 673 | } |
| 674 | EXPORT_SYMBOL(ib_modify_port); |
| 675 | |
Yosef Etigin | 5eb620c | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 676 | /** |
| 677 | * ib_find_gid - Returns the port number and GID table index where |
| 678 | * a specified GID value occurs. |
| 679 | * @device: The device to query. |
| 680 | * @gid: The GID value to search for. |
| 681 | * @port_num: The port number of the device where the GID value was found. |
| 682 | * @index: The index into the GID table where the GID was found. This |
| 683 | * parameter may be NULL. |
| 684 | */ |
| 685 | int ib_find_gid(struct ib_device *device, union ib_gid *gid, |
| 686 | u8 *port_num, u16 *index) |
| 687 | { |
| 688 | union ib_gid tmp_gid; |
| 689 | int ret, port, i; |
| 690 | |
Ira Weiny | 0cf18d7 | 2015-05-13 20:02:55 -0400 | [diff] [blame] | 691 | for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) { |
Ira Weiny | 7738613 | 2015-05-13 20:02:58 -0400 | [diff] [blame] | 692 | for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) { |
Yosef Etigin | 5eb620c | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 693 | ret = ib_query_gid(device, port, i, &tmp_gid); |
| 694 | if (ret) |
| 695 | return ret; |
| 696 | if (!memcmp(&tmp_gid, gid, sizeof *gid)) { |
| 697 | *port_num = port; |
| 698 | if (index) |
| 699 | *index = i; |
| 700 | return 0; |
| 701 | } |
| 702 | } |
| 703 | } |
| 704 | |
| 705 | return -ENOENT; |
| 706 | } |
| 707 | EXPORT_SYMBOL(ib_find_gid); |
| 708 | |
| 709 | /** |
| 710 | * ib_find_pkey - Returns the PKey table index where a specified |
| 711 | * PKey value occurs. |
| 712 | * @device: The device to query. |
| 713 | * @port_num: The port number of the device to search for the PKey. |
| 714 | * @pkey: The PKey value to search for. |
| 715 | * @index: The index into the PKey table where the PKey was found. |
| 716 | */ |
| 717 | int ib_find_pkey(struct ib_device *device, |
| 718 | u8 port_num, u16 pkey, u16 *index) |
| 719 | { |
| 720 | int ret, i; |
| 721 | u16 tmp_pkey; |
Jack Morgenstein | ff7166c | 2012-08-03 08:40:38 +0000 | [diff] [blame] | 722 | int partial_ix = -1; |
Yosef Etigin | 5eb620c | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 723 | |
Ira Weiny | 7738613 | 2015-05-13 20:02:58 -0400 | [diff] [blame] | 724 | for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) { |
Yosef Etigin | 5eb620c | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 725 | ret = ib_query_pkey(device, port_num, i, &tmp_pkey); |
| 726 | if (ret) |
| 727 | return ret; |
Moni Shoua | 36026ec | 2007-07-23 10:07:42 +0300 | [diff] [blame] | 728 | if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) { |
Jack Morgenstein | ff7166c | 2012-08-03 08:40:38 +0000 | [diff] [blame] | 729 | /* if there is full-member pkey take it.*/ |
| 730 | if (tmp_pkey & 0x8000) { |
| 731 | *index = i; |
| 732 | return 0; |
| 733 | } |
| 734 | if (partial_ix < 0) |
| 735 | partial_ix = i; |
Yosef Etigin | 5eb620c | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 736 | } |
| 737 | } |
| 738 | |
Jack Morgenstein | ff7166c | 2012-08-03 08:40:38 +0000 | [diff] [blame] | 739 | /*no full-member, if exists take the limited*/ |
| 740 | if (partial_ix >= 0) { |
| 741 | *index = partial_ix; |
| 742 | return 0; |
| 743 | } |
Yosef Etigin | 5eb620c | 2007-05-14 07:26:51 +0300 | [diff] [blame] | 744 | return -ENOENT; |
| 745 | } |
| 746 | EXPORT_SYMBOL(ib_find_pkey); |
| 747 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | static int __init ib_core_init(void) |
| 749 | { |
| 750 | int ret; |
| 751 | |
Tejun Heo | f062671 | 2010-10-19 15:24:36 +0000 | [diff] [blame] | 752 | ib_wq = alloc_workqueue("infiniband", 0, 0); |
| 753 | if (!ib_wq) |
| 754 | return -ENOMEM; |
| 755 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | ret = ib_sysfs_setup(); |
Nir Muchtar | fd75c78 | 2011-05-20 11:46:10 -0700 | [diff] [blame] | 757 | if (ret) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | printk(KERN_WARNING "Couldn't create InfiniBand device class\n"); |
Nir Muchtar | fd75c78 | 2011-05-20 11:46:10 -0700 | [diff] [blame] | 759 | goto err; |
| 760 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | |
Roland Dreier | b2cbae2 | 2011-05-20 11:46:11 -0700 | [diff] [blame] | 762 | ret = ibnl_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | if (ret) { |
Roland Dreier | b2cbae2 | 2011-05-20 11:46:11 -0700 | [diff] [blame] | 764 | printk(KERN_WARNING "Couldn't init IB netlink interface\n"); |
Nir Muchtar | fd75c78 | 2011-05-20 11:46:10 -0700 | [diff] [blame] | 765 | goto err_sysfs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | } |
| 767 | |
Roland Dreier | b2cbae2 | 2011-05-20 11:46:11 -0700 | [diff] [blame] | 768 | ret = ib_cache_setup(); |
| 769 | if (ret) { |
| 770 | printk(KERN_WARNING "Couldn't set up InfiniBand P_Key/GID cache\n"); |
| 771 | goto err_nl; |
| 772 | } |
| 773 | |
Nir Muchtar | fd75c78 | 2011-05-20 11:46:10 -0700 | [diff] [blame] | 774 | return 0; |
| 775 | |
Roland Dreier | b2cbae2 | 2011-05-20 11:46:11 -0700 | [diff] [blame] | 776 | err_nl: |
| 777 | ibnl_cleanup(); |
| 778 | |
Nir Muchtar | fd75c78 | 2011-05-20 11:46:10 -0700 | [diff] [blame] | 779 | err_sysfs: |
| 780 | ib_sysfs_cleanup(); |
| 781 | |
| 782 | err: |
| 783 | destroy_workqueue(ib_wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | return ret; |
| 785 | } |
| 786 | |
| 787 | static void __exit ib_core_cleanup(void) |
| 788 | { |
| 789 | ib_cache_cleanup(); |
Roland Dreier | b2cbae2 | 2011-05-20 11:46:11 -0700 | [diff] [blame] | 790 | ibnl_cleanup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | ib_sysfs_cleanup(); |
Roland Dreier | f7c6a7b | 2007-03-04 16:15:11 -0800 | [diff] [blame] | 792 | /* Make sure that any pending umem accounting work is done. */ |
Tejun Heo | f062671 | 2010-10-19 15:24:36 +0000 | [diff] [blame] | 793 | destroy_workqueue(ib_wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | } |
| 795 | |
| 796 | module_init(ib_core_init); |
| 797 | module_exit(ib_core_cleanup); |