Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2006 Oracle. All rights reserved. |
| 3 | * |
| 4 | * This software is available to you under a choice of one of two |
| 5 | * licenses. You may choose to be licensed under the terms of the GNU |
| 6 | * General Public License (GPL) Version 2, available from the file |
| 7 | * COPYING in the main directory of this source tree, or the |
| 8 | * OpenIB.org BSD license below: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 18 | * - Redistributions in binary form must reproduce the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer in the documentation and/or other materials |
| 21 | * provided with the distribution. |
| 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 30 | * SOFTWARE. |
| 31 | * |
| 32 | */ |
| 33 | #include <linux/kernel.h> |
| 34 | #include <linux/in.h> |
| 35 | #include <linux/if.h> |
| 36 | #include <linux/netdevice.h> |
| 37 | #include <linux/inetdevice.h> |
| 38 | #include <linux/if_arp.h> |
| 39 | #include <linux/delay.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 40 | #include <linux/slab.h> |
Paul Gortmaker | 3a9a231 | 2011-05-27 09:12:25 -0400 | [diff] [blame] | 41 | #include <linux/module.h> |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 42 | |
| 43 | #include "rds.h" |
| 44 | #include "ib.h" |
santosh.shilimkar@oracle.com | f6df683 | 2016-03-01 15:20:46 -0800 | [diff] [blame] | 45 | #include "ib_mr.h" |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 46 | |
santosh.shilimkar@oracle.com | f6df683 | 2016-03-01 15:20:46 -0800 | [diff] [blame] | 47 | unsigned int rds_ib_mr_1m_pool_size = RDS_MR_1M_POOL_SIZE; |
| 48 | unsigned int rds_ib_mr_8k_pool_size = RDS_MR_8K_POOL_SIZE; |
Andy Grover | 3ba23ad | 2009-07-17 13:13:22 +0000 | [diff] [blame] | 49 | unsigned int rds_ib_retry_count = RDS_IB_DEFAULT_RETRY_COUNT; |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 50 | |
santosh.shilimkar@oracle.com | f6df683 | 2016-03-01 15:20:46 -0800 | [diff] [blame] | 51 | module_param(rds_ib_mr_1m_pool_size, int, 0444); |
| 52 | MODULE_PARM_DESC(rds_ib_mr_1m_pool_size, " Max number of 1M mr per HCA"); |
| 53 | module_param(rds_ib_mr_8k_pool_size, int, 0444); |
| 54 | MODULE_PARM_DESC(rds_ib_mr_8k_pool_size, " Max number of 8K mr per HCA"); |
Andy Grover | 3ba23ad | 2009-07-17 13:13:22 +0000 | [diff] [blame] | 55 | module_param(rds_ib_retry_count, int, 0444); |
| 56 | MODULE_PARM_DESC(rds_ib_retry_count, " Number of hw retries before reporting an error"); |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 57 | |
Zach Brown | ea81986 | 2010-07-15 12:34:33 -0700 | [diff] [blame] | 58 | /* |
| 59 | * we have a clumsy combination of RCU and a rwsem protecting this list |
| 60 | * because it is used both in the get_mr fast path and while blocking in |
| 61 | * the FMR flushing path. |
| 62 | */ |
| 63 | DECLARE_RWSEM(rds_ib_devices_lock); |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 64 | struct list_head rds_ib_devices; |
| 65 | |
Andy Grover | 745cbcc | 2009-04-01 08:20:19 +0000 | [diff] [blame] | 66 | /* NOTE: if also grabbing ibdev lock, grab this first */ |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 67 | DEFINE_SPINLOCK(ib_nodev_conns_lock); |
| 68 | LIST_HEAD(ib_nodev_conns); |
| 69 | |
stephen hemminger | ff51bf8 | 2010-10-19 08:08:33 +0000 | [diff] [blame] | 70 | static void rds_ib_nodev_connect(void) |
Zach Brown | fc19de3 | 2010-05-24 13:16:57 -0700 | [diff] [blame] | 71 | { |
| 72 | struct rds_ib_connection *ic; |
| 73 | |
| 74 | spin_lock(&ib_nodev_conns_lock); |
| 75 | list_for_each_entry(ic, &ib_nodev_conns, ib_node) |
| 76 | rds_conn_connect_if_down(ic->conn); |
| 77 | spin_unlock(&ib_nodev_conns_lock); |
| 78 | } |
| 79 | |
stephen hemminger | ff51bf8 | 2010-10-19 08:08:33 +0000 | [diff] [blame] | 80 | static void rds_ib_dev_shutdown(struct rds_ib_device *rds_ibdev) |
Zach Brown | fc19de3 | 2010-05-24 13:16:57 -0700 | [diff] [blame] | 81 | { |
| 82 | struct rds_ib_connection *ic; |
| 83 | unsigned long flags; |
| 84 | |
| 85 | spin_lock_irqsave(&rds_ibdev->spinlock, flags); |
| 86 | list_for_each_entry(ic, &rds_ibdev->conn_list, ib_node) |
| 87 | rds_conn_drop(ic->conn); |
| 88 | spin_unlock_irqrestore(&rds_ibdev->spinlock, flags); |
| 89 | } |
| 90 | |
Zach Brown | 3e0249f | 2010-05-18 15:48:51 -0700 | [diff] [blame] | 91 | /* |
| 92 | * rds_ib_destroy_mr_pool() blocks on a few things and mrs drop references |
| 93 | * from interrupt context so we push freing off into a work struct in krdsd. |
| 94 | */ |
| 95 | static void rds_ib_dev_free(struct work_struct *work) |
| 96 | { |
| 97 | struct rds_ib_ipaddr *i_ipaddr, *i_next; |
| 98 | struct rds_ib_device *rds_ibdev = container_of(work, |
| 99 | struct rds_ib_device, free_work); |
| 100 | |
Santosh Shilimkar | 0676651 | 2015-09-10 21:20:57 -0700 | [diff] [blame] | 101 | if (rds_ibdev->mr_8k_pool) |
| 102 | rds_ib_destroy_mr_pool(rds_ibdev->mr_8k_pool); |
| 103 | if (rds_ibdev->mr_1m_pool) |
| 104 | rds_ib_destroy_mr_pool(rds_ibdev->mr_1m_pool); |
Zach Brown | 3e0249f | 2010-05-18 15:48:51 -0700 | [diff] [blame] | 105 | if (rds_ibdev->pd) |
| 106 | ib_dealloc_pd(rds_ibdev->pd); |
| 107 | |
| 108 | list_for_each_entry_safe(i_ipaddr, i_next, &rds_ibdev->ipaddr_list, list) { |
| 109 | list_del(&i_ipaddr->list); |
| 110 | kfree(i_ipaddr); |
| 111 | } |
| 112 | |
| 113 | kfree(rds_ibdev); |
| 114 | } |
| 115 | |
| 116 | void rds_ib_dev_put(struct rds_ib_device *rds_ibdev) |
| 117 | { |
| 118 | BUG_ON(atomic_read(&rds_ibdev->refcount) <= 0); |
| 119 | if (atomic_dec_and_test(&rds_ibdev->refcount)) |
| 120 | queue_work(rds_wq, &rds_ibdev->free_work); |
| 121 | } |
| 122 | |
stephen hemminger | ff51bf8 | 2010-10-19 08:08:33 +0000 | [diff] [blame] | 123 | static void rds_ib_add_one(struct ib_device *device) |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 124 | { |
| 125 | struct rds_ib_device *rds_ibdev; |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 126 | |
| 127 | /* Only handle IB (no iWARP) devices */ |
| 128 | if (device->node_type != RDMA_NODE_IB_CA) |
| 129 | return; |
| 130 | |
Zach Brown | 3e0249f | 2010-05-18 15:48:51 -0700 | [diff] [blame] | 131 | rds_ibdev = kzalloc_node(sizeof(struct rds_ib_device), GFP_KERNEL, |
| 132 | ibdev_to_node(device)); |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 133 | if (!rds_ibdev) |
Or Gerlitz | 0353261 | 2015-12-18 10:59:47 +0200 | [diff] [blame] | 134 | return; |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 135 | |
| 136 | spin_lock_init(&rds_ibdev->spinlock); |
Zach Brown | 3e0249f | 2010-05-18 15:48:51 -0700 | [diff] [blame] | 137 | atomic_set(&rds_ibdev->refcount, 1); |
| 138 | INIT_WORK(&rds_ibdev->free_work, rds_ib_dev_free); |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 139 | |
Or Gerlitz | 0353261 | 2015-12-18 10:59:47 +0200 | [diff] [blame] | 140 | rds_ibdev->max_wrs = device->attrs.max_qp_wr; |
| 141 | rds_ibdev->max_sge = min(device->attrs.max_sge, RDS_IB_MAX_SGE); |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 142 | |
santosh.shilimkar@oracle.com | 2cb2912 | 2016-03-01 15:20:52 -0800 | [diff] [blame] | 143 | rds_ibdev->has_fr = (device->attrs.device_cap_flags & |
| 144 | IB_DEVICE_MEM_MGT_EXTENSIONS); |
| 145 | rds_ibdev->has_fmr = (device->alloc_fmr && device->dealloc_fmr && |
| 146 | device->map_phys_fmr && device->unmap_fmr); |
| 147 | rds_ibdev->use_fastreg = (rds_ibdev->has_fr && !rds_ibdev->has_fmr); |
| 148 | |
Or Gerlitz | 0353261 | 2015-12-18 10:59:47 +0200 | [diff] [blame] | 149 | rds_ibdev->fmr_max_remaps = device->attrs.max_map_per_fmr?: 32; |
santosh.shilimkar@oracle.com | f6df683 | 2016-03-01 15:20:46 -0800 | [diff] [blame] | 150 | rds_ibdev->max_1m_mrs = device->attrs.max_mr ? |
Or Gerlitz | 0353261 | 2015-12-18 10:59:47 +0200 | [diff] [blame] | 151 | min_t(unsigned int, (device->attrs.max_mr / 2), |
santosh.shilimkar@oracle.com | f6df683 | 2016-03-01 15:20:46 -0800 | [diff] [blame] | 152 | rds_ib_mr_1m_pool_size) : rds_ib_mr_1m_pool_size; |
Santosh Shilimkar | 0676651 | 2015-09-10 21:20:57 -0700 | [diff] [blame] | 153 | |
santosh.shilimkar@oracle.com | f6df683 | 2016-03-01 15:20:46 -0800 | [diff] [blame] | 154 | rds_ibdev->max_8k_mrs = device->attrs.max_mr ? |
Or Gerlitz | 0353261 | 2015-12-18 10:59:47 +0200 | [diff] [blame] | 155 | min_t(unsigned int, ((device->attrs.max_mr / 2) * RDS_MR_8K_SCALE), |
santosh.shilimkar@oracle.com | f6df683 | 2016-03-01 15:20:46 -0800 | [diff] [blame] | 156 | rds_ib_mr_8k_pool_size) : rds_ib_mr_8k_pool_size; |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 157 | |
Or Gerlitz | 0353261 | 2015-12-18 10:59:47 +0200 | [diff] [blame] | 158 | rds_ibdev->max_initiator_depth = device->attrs.max_qp_init_rd_atom; |
| 159 | rds_ibdev->max_responder_resources = device->attrs.max_qp_rd_atom; |
Andy Grover | 40589e7 | 2010-01-12 10:50:48 -0800 | [diff] [blame] | 160 | |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 161 | rds_ibdev->dev = device; |
| 162 | rds_ibdev->pd = ib_alloc_pd(device); |
Zach Brown | 3e0249f | 2010-05-18 15:48:51 -0700 | [diff] [blame] | 163 | if (IS_ERR(rds_ibdev->pd)) { |
| 164 | rds_ibdev->pd = NULL; |
| 165 | goto put_dev; |
| 166 | } |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 167 | |
Santosh Shilimkar | 0676651 | 2015-09-10 21:20:57 -0700 | [diff] [blame] | 168 | rds_ibdev->mr_1m_pool = |
| 169 | rds_ib_create_mr_pool(rds_ibdev, RDS_IB_MR_1M_POOL); |
| 170 | if (IS_ERR(rds_ibdev->mr_1m_pool)) { |
| 171 | rds_ibdev->mr_1m_pool = NULL; |
Zach Brown | 3e0249f | 2010-05-18 15:48:51 -0700 | [diff] [blame] | 172 | goto put_dev; |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 173 | } |
| 174 | |
Santosh Shilimkar | 0676651 | 2015-09-10 21:20:57 -0700 | [diff] [blame] | 175 | rds_ibdev->mr_8k_pool = |
| 176 | rds_ib_create_mr_pool(rds_ibdev, RDS_IB_MR_8K_POOL); |
| 177 | if (IS_ERR(rds_ibdev->mr_8k_pool)) { |
| 178 | rds_ibdev->mr_8k_pool = NULL; |
| 179 | goto put_dev; |
| 180 | } |
| 181 | |
santosh.shilimkar@oracle.com | f6df683 | 2016-03-01 15:20:46 -0800 | [diff] [blame] | 182 | rdsdebug("RDS/IB: max_mr = %d, max_wrs = %d, max_sge = %d, fmr_max_remaps = %d, max_1m_mrs = %d, max_8k_mrs = %d\n", |
Or Gerlitz | 0353261 | 2015-12-18 10:59:47 +0200 | [diff] [blame] | 183 | device->attrs.max_fmr, rds_ibdev->max_wrs, rds_ibdev->max_sge, |
santosh.shilimkar@oracle.com | f6df683 | 2016-03-01 15:20:46 -0800 | [diff] [blame] | 184 | rds_ibdev->fmr_max_remaps, rds_ibdev->max_1m_mrs, |
| 185 | rds_ibdev->max_8k_mrs); |
Santosh Shilimkar | 0676651 | 2015-09-10 21:20:57 -0700 | [diff] [blame] | 186 | |
santosh.shilimkar@oracle.com | 2cb2912 | 2016-03-01 15:20:52 -0800 | [diff] [blame] | 187 | pr_info("RDS/IB: %s: %s supported and preferred\n", |
| 188 | device->name, |
| 189 | rds_ibdev->use_fastreg ? "FRMR" : "FMR"); |
| 190 | |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 191 | INIT_LIST_HEAD(&rds_ibdev->ipaddr_list); |
| 192 | INIT_LIST_HEAD(&rds_ibdev->conn_list); |
Zach Brown | ea81986 | 2010-07-15 12:34:33 -0700 | [diff] [blame] | 193 | |
| 194 | down_write(&rds_ib_devices_lock); |
| 195 | list_add_tail_rcu(&rds_ibdev->list, &rds_ib_devices); |
| 196 | up_write(&rds_ib_devices_lock); |
Zach Brown | 3e0249f | 2010-05-18 15:48:51 -0700 | [diff] [blame] | 197 | atomic_inc(&rds_ibdev->refcount); |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 198 | |
| 199 | ib_set_client_data(device, &rds_ib_client, rds_ibdev); |
Zach Brown | 3e0249f | 2010-05-18 15:48:51 -0700 | [diff] [blame] | 200 | atomic_inc(&rds_ibdev->refcount); |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 201 | |
Zach Brown | fc19de3 | 2010-05-24 13:16:57 -0700 | [diff] [blame] | 202 | rds_ib_nodev_connect(); |
| 203 | |
Zach Brown | 3e0249f | 2010-05-18 15:48:51 -0700 | [diff] [blame] | 204 | put_dev: |
| 205 | rds_ib_dev_put(rds_ibdev); |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 206 | } |
| 207 | |
Zach Brown | 3e0249f | 2010-05-18 15:48:51 -0700 | [diff] [blame] | 208 | /* |
| 209 | * New connections use this to find the device to associate with the |
| 210 | * connection. It's not in the fast path so we're not concerned about the |
| 211 | * performance of the IB call. (As of this writing, it uses an interrupt |
| 212 | * blocking spinlock to serialize walking a per-device list of all registered |
| 213 | * clients.) |
| 214 | * |
| 215 | * RCU is used to handle incoming connections racing with device teardown. |
| 216 | * Rather than use a lock to serialize removal from the client_data and |
| 217 | * getting a new reference, we use an RCU grace period. The destruction |
| 218 | * path removes the device from client_data and then waits for all RCU |
| 219 | * readers to finish. |
| 220 | * |
| 221 | * A new connection can get NULL from this if its arriving on a |
| 222 | * device that is in the process of being removed. |
| 223 | */ |
| 224 | struct rds_ib_device *rds_ib_get_client_data(struct ib_device *device) |
| 225 | { |
| 226 | struct rds_ib_device *rds_ibdev; |
| 227 | |
| 228 | rcu_read_lock(); |
| 229 | rds_ibdev = ib_get_client_data(device, &rds_ib_client); |
| 230 | if (rds_ibdev) |
| 231 | atomic_inc(&rds_ibdev->refcount); |
| 232 | rcu_read_unlock(); |
| 233 | return rds_ibdev; |
| 234 | } |
| 235 | |
| 236 | /* |
| 237 | * The IB stack is letting us know that a device is going away. This can |
| 238 | * happen if the underlying HCA driver is removed or if PCI hotplug is removing |
| 239 | * the pci function, for example. |
| 240 | * |
| 241 | * This can be called at any time and can be racing with any other RDS path. |
| 242 | */ |
Haggai Eran | 7c1eb45 | 2015-07-30 17:50:14 +0300 | [diff] [blame] | 243 | static void rds_ib_remove_one(struct ib_device *device, void *client_data) |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 244 | { |
Haggai Eran | 7c1eb45 | 2015-07-30 17:50:14 +0300 | [diff] [blame] | 245 | struct rds_ib_device *rds_ibdev = client_data; |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 246 | |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 247 | if (!rds_ibdev) |
| 248 | return; |
| 249 | |
Zach Brown | fc19de3 | 2010-05-24 13:16:57 -0700 | [diff] [blame] | 250 | rds_ib_dev_shutdown(rds_ibdev); |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 251 | |
Zach Brown | ea81986 | 2010-07-15 12:34:33 -0700 | [diff] [blame] | 252 | /* stop connection attempts from getting a reference to this device. */ |
Zach Brown | 3e0249f | 2010-05-18 15:48:51 -0700 | [diff] [blame] | 253 | ib_set_client_data(device, &rds_ib_client, NULL); |
Zach Brown | ea81986 | 2010-07-15 12:34:33 -0700 | [diff] [blame] | 254 | |
| 255 | down_write(&rds_ib_devices_lock); |
| 256 | list_del_rcu(&rds_ibdev->list); |
| 257 | up_write(&rds_ib_devices_lock); |
| 258 | |
| 259 | /* |
| 260 | * This synchronize rcu is waiting for readers of both the ib |
| 261 | * client data and the devices list to finish before we drop |
| 262 | * both of those references. |
| 263 | */ |
Zach Brown | 3e0249f | 2010-05-18 15:48:51 -0700 | [diff] [blame] | 264 | synchronize_rcu(); |
| 265 | rds_ib_dev_put(rds_ibdev); |
Zach Brown | 3e0249f | 2010-05-18 15:48:51 -0700 | [diff] [blame] | 266 | rds_ib_dev_put(rds_ibdev); |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 267 | } |
| 268 | |
| 269 | struct ib_client rds_ib_client = { |
| 270 | .name = "rds_ib", |
| 271 | .add = rds_ib_add_one, |
| 272 | .remove = rds_ib_remove_one |
| 273 | }; |
| 274 | |
| 275 | static int rds_ib_conn_info_visitor(struct rds_connection *conn, |
| 276 | void *buffer) |
| 277 | { |
| 278 | struct rds_info_rdma_connection *iinfo = buffer; |
| 279 | struct rds_ib_connection *ic; |
| 280 | |
| 281 | /* We will only ever look at IB transports */ |
| 282 | if (conn->c_trans != &rds_ib_transport) |
| 283 | return 0; |
| 284 | |
| 285 | iinfo->src_addr = conn->c_laddr; |
| 286 | iinfo->dst_addr = conn->c_faddr; |
| 287 | |
| 288 | memset(&iinfo->src_gid, 0, sizeof(iinfo->src_gid)); |
| 289 | memset(&iinfo->dst_gid, 0, sizeof(iinfo->dst_gid)); |
| 290 | if (rds_conn_state(conn) == RDS_CONN_UP) { |
| 291 | struct rds_ib_device *rds_ibdev; |
| 292 | struct rdma_dev_addr *dev_addr; |
| 293 | |
| 294 | ic = conn->c_transport_data; |
| 295 | dev_addr = &ic->i_cm_id->route.addr.dev_addr; |
| 296 | |
Sean Hefty | 6f8372b | 2009-11-19 13:26:06 -0800 | [diff] [blame] | 297 | rdma_addr_get_sgid(dev_addr, (union ib_gid *) &iinfo->src_gid); |
| 298 | rdma_addr_get_dgid(dev_addr, (union ib_gid *) &iinfo->dst_gid); |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 299 | |
Zach Brown | 3e0249f | 2010-05-18 15:48:51 -0700 | [diff] [blame] | 300 | rds_ibdev = ic->rds_ibdev; |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 301 | iinfo->max_send_wr = ic->i_send_ring.w_nr; |
| 302 | iinfo->max_recv_wr = ic->i_recv_ring.w_nr; |
| 303 | iinfo->max_send_sge = rds_ibdev->max_sge; |
| 304 | rds_ib_get_mr_info(rds_ibdev, iinfo); |
| 305 | } |
| 306 | return 1; |
| 307 | } |
| 308 | |
| 309 | static void rds_ib_ic_info(struct socket *sock, unsigned int len, |
| 310 | struct rds_info_iterator *iter, |
| 311 | struct rds_info_lengths *lens) |
| 312 | { |
| 313 | rds_for_each_conn_info(sock, len, iter, lens, |
| 314 | rds_ib_conn_info_visitor, |
| 315 | sizeof(struct rds_info_rdma_connection)); |
| 316 | } |
| 317 | |
| 318 | |
| 319 | /* |
| 320 | * Early RDS/IB was built to only bind to an address if there is an IPoIB |
| 321 | * device with that address set. |
| 322 | * |
| 323 | * If it were me, I'd advocate for something more flexible. Sending and |
| 324 | * receiving should be device-agnostic. Transports would try and maintain |
| 325 | * connections between peers who have messages queued. Userspace would be |
| 326 | * allowed to influence which paths have priority. We could call userspace |
| 327 | * asserting this policy "routing". |
| 328 | */ |
Sowmini Varadhan | d5a8ac2 | 2015-08-05 01:43:25 -0400 | [diff] [blame] | 329 | static int rds_ib_laddr_check(struct net *net, __be32 addr) |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 330 | { |
| 331 | int ret; |
| 332 | struct rdma_cm_id *cm_id; |
| 333 | struct sockaddr_in sin; |
| 334 | |
| 335 | /* Create a CMA ID and try to bind it. This catches both |
| 336 | * IB and iWARP capable NICs. |
| 337 | */ |
Guy Shapiro | fa20105 | 2015-10-22 15:20:10 +0300 | [diff] [blame] | 338 | cm_id = rdma_create_id(&init_net, NULL, NULL, RDMA_PS_TCP, IB_QPT_RC); |
Dan Carpenter | 94713ba | 2009-04-09 14:09:46 +0000 | [diff] [blame] | 339 | if (IS_ERR(cm_id)) |
| 340 | return PTR_ERR(cm_id); |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 341 | |
| 342 | memset(&sin, 0, sizeof(sin)); |
| 343 | sin.sin_family = AF_INET; |
| 344 | sin.sin_addr.s_addr = addr; |
| 345 | |
| 346 | /* rdma_bind_addr will only succeed for IB & iWARP devices */ |
| 347 | ret = rdma_bind_addr(cm_id, (struct sockaddr *)&sin); |
| 348 | /* due to this, we will claim to support iWARP devices unless we |
| 349 | check node_type. */ |
Sasha Levin | c234975 | 2013-12-18 23:49:42 -0500 | [diff] [blame] | 350 | if (ret || !cm_id->device || |
| 351 | cm_id->device->node_type != RDMA_NODE_IB_CA) |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 352 | ret = -EADDRNOTAVAIL; |
| 353 | |
| 354 | rdsdebug("addr %pI4 ret %d node type %d\n", |
| 355 | &addr, ret, |
| 356 | cm_id->device ? cm_id->device->node_type : -1); |
| 357 | |
| 358 | rdma_destroy_id(cm_id); |
| 359 | |
| 360 | return ret; |
| 361 | } |
| 362 | |
Zach Brown | 24fa163 | 2010-06-25 14:59:49 -0700 | [diff] [blame] | 363 | static void rds_ib_unregister_client(void) |
| 364 | { |
| 365 | ib_unregister_client(&rds_ib_client); |
| 366 | /* wait for rds_ib_dev_free() to complete */ |
| 367 | flush_workqueue(rds_wq); |
| 368 | } |
| 369 | |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 370 | void rds_ib_exit(void) |
| 371 | { |
| 372 | rds_info_deregister_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info); |
Zach Brown | 24fa163 | 2010-06-25 14:59:49 -0700 | [diff] [blame] | 373 | rds_ib_unregister_client(); |
Zach Brown | 8aeb1ba | 2010-06-25 14:58:16 -0700 | [diff] [blame] | 374 | rds_ib_destroy_nodev_conns(); |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 375 | rds_ib_sysctl_exit(); |
| 376 | rds_ib_recv_exit(); |
| 377 | rds_trans_unregister(&rds_ib_transport); |
santosh.shilimkar@oracle.com | f6df683 | 2016-03-01 15:20:46 -0800 | [diff] [blame] | 378 | rds_ib_mr_exit(); |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 379 | } |
| 380 | |
| 381 | struct rds_transport rds_ib_transport = { |
| 382 | .laddr_check = rds_ib_laddr_check, |
| 383 | .xmit_complete = rds_ib_xmit_complete, |
| 384 | .xmit = rds_ib_xmit, |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 385 | .xmit_rdma = rds_ib_xmit_rdma, |
Andy Grover | 15133f6 | 2010-01-12 14:33:38 -0800 | [diff] [blame] | 386 | .xmit_atomic = rds_ib_xmit_atomic, |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 387 | .recv = rds_ib_recv, |
| 388 | .conn_alloc = rds_ib_conn_alloc, |
| 389 | .conn_free = rds_ib_conn_free, |
| 390 | .conn_connect = rds_ib_conn_connect, |
| 391 | .conn_shutdown = rds_ib_conn_shutdown, |
| 392 | .inc_copy_to_user = rds_ib_inc_copy_to_user, |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 393 | .inc_free = rds_ib_inc_free, |
| 394 | .cm_initiate_connect = rds_ib_cm_initiate_connect, |
| 395 | .cm_handle_connect = rds_ib_cm_handle_connect, |
| 396 | .cm_connect_complete = rds_ib_cm_connect_complete, |
| 397 | .stats_info_copy = rds_ib_stats_info_copy, |
| 398 | .exit = rds_ib_exit, |
| 399 | .get_mr = rds_ib_get_mr, |
| 400 | .sync_mr = rds_ib_sync_mr, |
| 401 | .free_mr = rds_ib_free_mr, |
| 402 | .flush_mrs = rds_ib_flush_mrs, |
| 403 | .t_owner = THIS_MODULE, |
| 404 | .t_name = "infiniband", |
Andy Grover | 335776bd | 2009-08-21 12:28:34 +0000 | [diff] [blame] | 405 | .t_type = RDS_TRANS_IB |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 406 | }; |
| 407 | |
Zach Brown | ef87b7e | 2010-07-09 12:26:20 -0700 | [diff] [blame] | 408 | int rds_ib_init(void) |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 409 | { |
| 410 | int ret; |
| 411 | |
| 412 | INIT_LIST_HEAD(&rds_ib_devices); |
| 413 | |
santosh.shilimkar@oracle.com | f6df683 | 2016-03-01 15:20:46 -0800 | [diff] [blame] | 414 | ret = rds_ib_mr_init(); |
Zach Brown | 515e079 | 2010-07-06 15:09:56 -0700 | [diff] [blame] | 415 | if (ret) |
Tejun Heo | c534a10 | 2011-02-01 11:42:43 +0100 | [diff] [blame] | 416 | goto out; |
Zach Brown | 515e079 | 2010-07-06 15:09:56 -0700 | [diff] [blame] | 417 | |
santosh.shilimkar@oracle.com | ad1d7dc | 2015-08-25 12:02:01 -0700 | [diff] [blame] | 418 | ret = ib_register_client(&rds_ib_client); |
| 419 | if (ret) |
santosh.shilimkar@oracle.com | f6df683 | 2016-03-01 15:20:46 -0800 | [diff] [blame] | 420 | goto out_mr_exit; |
santosh.shilimkar@oracle.com | ad1d7dc | 2015-08-25 12:02:01 -0700 | [diff] [blame] | 421 | |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 422 | ret = rds_ib_sysctl_init(); |
| 423 | if (ret) |
| 424 | goto out_ibreg; |
| 425 | |
| 426 | ret = rds_ib_recv_init(); |
| 427 | if (ret) |
| 428 | goto out_sysctl; |
| 429 | |
| 430 | ret = rds_trans_register(&rds_ib_transport); |
| 431 | if (ret) |
| 432 | goto out_recv; |
| 433 | |
| 434 | rds_info_register_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info); |
| 435 | |
| 436 | goto out; |
| 437 | |
| 438 | out_recv: |
| 439 | rds_ib_recv_exit(); |
| 440 | out_sysctl: |
| 441 | rds_ib_sysctl_exit(); |
| 442 | out_ibreg: |
Zach Brown | 24fa163 | 2010-06-25 14:59:49 -0700 | [diff] [blame] | 443 | rds_ib_unregister_client(); |
santosh.shilimkar@oracle.com | f6df683 | 2016-03-01 15:20:46 -0800 | [diff] [blame] | 444 | out_mr_exit: |
| 445 | rds_ib_mr_exit(); |
Andy Grover | ec16227 | 2009-02-24 15:30:30 +0000 | [diff] [blame] | 446 | out: |
| 447 | return ret; |
| 448 | } |
| 449 | |
| 450 | MODULE_LICENSE("GPL"); |
| 451 | |