11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (c) 2004 Topspin Communications. All rights reserved. 32a1d9b7fSRoland Dreier * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 42a1d9b7fSRoland Dreier * Copyright (c) 2004 Voltaire, Inc. All rights reserved. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This software is available to you under a choice of one of two 71da177e4SLinus Torvalds * licenses. You may choose to be licensed under the terms of the GNU 81da177e4SLinus Torvalds * General Public License (GPL) Version 2, available from the file 91da177e4SLinus Torvalds * COPYING in the main directory of this source tree, or the 101da177e4SLinus Torvalds * OpenIB.org BSD license below: 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or 131da177e4SLinus Torvalds * without modification, are permitted provided that the following 141da177e4SLinus Torvalds * conditions are met: 151da177e4SLinus Torvalds * 161da177e4SLinus Torvalds * - Redistributions of source code must retain the above 171da177e4SLinus Torvalds * copyright notice, this list of conditions and the following 181da177e4SLinus Torvalds * disclaimer. 191da177e4SLinus Torvalds * 201da177e4SLinus Torvalds * - Redistributions in binary form must reproduce the above 211da177e4SLinus Torvalds * copyright notice, this list of conditions and the following 221da177e4SLinus Torvalds * disclaimer in the documentation and/or other materials 231da177e4SLinus Torvalds * provided with the distribution. 241da177e4SLinus Torvalds * 251da177e4SLinus Torvalds * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 261da177e4SLinus Torvalds * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 271da177e4SLinus Torvalds * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 281da177e4SLinus Torvalds * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 291da177e4SLinus Torvalds * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 301da177e4SLinus Torvalds * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 311da177e4SLinus Torvalds * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 321da177e4SLinus Torvalds * SOFTWARE. 331da177e4SLinus Torvalds */ 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds #include "ipoib.h" 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds #include <linux/module.h> 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds #include <linux/init.h> 401da177e4SLinus Torvalds #include <linux/slab.h> 410f485251SShirley Ma #include <linux/kernel.h> 4210313cbbSRoland Dreier #include <linux/vmalloc.h> 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds #include <linux/if_arp.h> /* For ARPHRD_xxx */ 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds #include <linux/ip.h> 471da177e4SLinus Torvalds #include <linux/in.h> 481da177e4SLinus Torvalds 49b63b70d8SShlomo Pongratz #include <linux/jhash.h> 50b63b70d8SShlomo Pongratz #include <net/arp.h> 51ddde896eSGuy Shapiro #include <net/addrconf.h> 52ddde896eSGuy Shapiro #include <linux/inetdevice.h> 53ddde896eSGuy Shapiro #include <rdma/ib_cache.h> 5414c85021SArnaldo Carvalho de Melo 554b48680bSYan Burman #define DRV_VERSION "1.0.0" 564b48680bSYan Burman 574b48680bSYan Burman const char ipoib_driver_version[] = DRV_VERSION; 584b48680bSYan Burman 591da177e4SLinus Torvalds MODULE_AUTHOR("Roland Dreier"); 601da177e4SLinus Torvalds MODULE_DESCRIPTION("IP-over-InfiniBand net driver"); 611da177e4SLinus Torvalds MODULE_LICENSE("Dual BSD/GPL"); 621da177e4SLinus Torvalds 630f485251SShirley Ma int ipoib_sendq_size __read_mostly = IPOIB_TX_RING_SIZE; 640f485251SShirley Ma int ipoib_recvq_size __read_mostly = IPOIB_RX_RING_SIZE; 650f485251SShirley Ma 660f485251SShirley Ma module_param_named(send_queue_size, ipoib_sendq_size, int, 0444); 670f485251SShirley Ma MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue"); 680f485251SShirley Ma module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444); 690f485251SShirley Ma MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue"); 700f485251SShirley Ma 711da177e4SLinus Torvalds #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 721da177e4SLinus Torvalds int ipoib_debug_level; 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds module_param_named(debug_level, ipoib_debug_level, int, 0644); 751da177e4SLinus Torvalds MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); 761da177e4SLinus Torvalds #endif 771da177e4SLinus Torvalds 781732b0efSRoland Dreier struct ipoib_path_iter { 791732b0efSRoland Dreier struct net_device *dev; 801732b0efSRoland Dreier struct ipoib_path path; 811732b0efSRoland Dreier }; 821732b0efSRoland Dreier 831da177e4SLinus Torvalds static const u8 ipv4_bcast_addr[] = { 841da177e4SLinus Torvalds 0x00, 0xff, 0xff, 0xff, 851da177e4SLinus Torvalds 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, 861da177e4SLinus Torvalds 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff 871da177e4SLinus Torvalds }; 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds struct workqueue_struct *ipoib_workqueue; 901da177e4SLinus Torvalds 91c1a0b23bSMichael S. Tsirkin struct ib_sa_client ipoib_sa_client; 92c1a0b23bSMichael S. Tsirkin 931da177e4SLinus Torvalds static void ipoib_add_one(struct ib_device *device); 947c1eb45aSHaggai Eran static void ipoib_remove_one(struct ib_device *device, void *client_data); 95b63b70d8SShlomo Pongratz static void ipoib_neigh_reclaim(struct rcu_head *rp); 96ddde896eSGuy Shapiro static struct net_device *ipoib_get_net_dev_by_params( 97ddde896eSGuy Shapiro struct ib_device *dev, u8 port, u16 pkey, 98ddde896eSGuy Shapiro const union ib_gid *gid, const struct sockaddr *addr, 99ddde896eSGuy Shapiro void *client_data); 100492a7e67SMark Bloch static int ipoib_set_mac(struct net_device *dev, void *addr); 10131a82362SFeras Daoud static int ipoib_ioctl(struct net_device *dev, struct ifreq *ifr, 10231a82362SFeras Daoud int cmd); 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds static struct ib_client ipoib_client = { 1051da177e4SLinus Torvalds .name = "ipoib", 1061da177e4SLinus Torvalds .add = ipoib_add_one, 107ddde896eSGuy Shapiro .remove = ipoib_remove_one, 108ddde896eSGuy Shapiro .get_net_dev_by_params = ipoib_get_net_dev_by_params, 1091da177e4SLinus Torvalds }; 1101da177e4SLinus Torvalds 111771a5258SShamir Rabinovitch #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 112771a5258SShamir Rabinovitch static int ipoib_netdev_event(struct notifier_block *this, 113771a5258SShamir Rabinovitch unsigned long event, void *ptr) 114771a5258SShamir Rabinovitch { 115771a5258SShamir Rabinovitch struct netdev_notifier_info *ni = ptr; 116771a5258SShamir Rabinovitch struct net_device *dev = ni->dev; 117771a5258SShamir Rabinovitch 118771a5258SShamir Rabinovitch if (dev->netdev_ops->ndo_open != ipoib_open) 119771a5258SShamir Rabinovitch return NOTIFY_DONE; 120771a5258SShamir Rabinovitch 121771a5258SShamir Rabinovitch switch (event) { 122771a5258SShamir Rabinovitch case NETDEV_REGISTER: 123771a5258SShamir Rabinovitch ipoib_create_debug_files(dev); 124771a5258SShamir Rabinovitch break; 125771a5258SShamir Rabinovitch case NETDEV_CHANGENAME: 126771a5258SShamir Rabinovitch ipoib_delete_debug_files(dev); 127771a5258SShamir Rabinovitch ipoib_create_debug_files(dev); 128771a5258SShamir Rabinovitch break; 129771a5258SShamir Rabinovitch case NETDEV_UNREGISTER: 130771a5258SShamir Rabinovitch ipoib_delete_debug_files(dev); 131771a5258SShamir Rabinovitch break; 132771a5258SShamir Rabinovitch } 133771a5258SShamir Rabinovitch 134771a5258SShamir Rabinovitch return NOTIFY_DONE; 135771a5258SShamir Rabinovitch } 136771a5258SShamir Rabinovitch #endif 137771a5258SShamir Rabinovitch 1381da177e4SLinus Torvalds int ipoib_open(struct net_device *dev) 1391da177e4SLinus Torvalds { 140c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds ipoib_dbg(priv, "bringing up interface\n"); 1431da177e4SLinus Torvalds 144437708c4SMichal Schmidt netif_carrier_off(dev); 145437708c4SMichal Schmidt 146e028cc55SYossi Etigin set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); 1471da177e4SLinus Torvalds 1483b561130SErez Shitrit priv->sm_fullmember_sendonly_support = false; 1493b561130SErez Shitrit 150efc82eeeSDoug Ledford if (ipoib_ib_dev_open(dev)) { 151db84f880SErez Shitrit if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) 1521da177e4SLinus Torvalds return 0; 153b8a1b1ceSRoland Dreier goto err_disable; 154dd57c930SAlex Estrin } 155fe25c561SYossi Etigin 1565c37077fSZhu Yanjun ipoib_ib_dev_up(dev); 1571da177e4SLinus Torvalds 1581da177e4SLinus Torvalds if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 1591da177e4SLinus Torvalds struct ipoib_dev_priv *cpriv; 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds /* Bring up any child interfaces too */ 162f47944ccSErez Shitrit down_read(&priv->vlan_rwsem); 1631da177e4SLinus Torvalds list_for_each_entry(cpriv, &priv->child_intfs, list) { 1641da177e4SLinus Torvalds int flags; 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds flags = cpriv->dev->flags; 1671da177e4SLinus Torvalds if (flags & IFF_UP) 1681da177e4SLinus Torvalds continue; 1691da177e4SLinus Torvalds 170567c5e13SPetr Machata dev_change_flags(cpriv->dev, flags | IFF_UP, NULL); 1711da177e4SLinus Torvalds } 172f47944ccSErez Shitrit up_read(&priv->vlan_rwsem); 1731da177e4SLinus Torvalds } 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds netif_start_queue(dev); 1761da177e4SLinus Torvalds 1771da177e4SLinus Torvalds return 0; 178b8a1b1ceSRoland Dreier 179b8a1b1ceSRoland Dreier err_disable: 180b8a1b1ceSRoland Dreier clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); 181b8a1b1ceSRoland Dreier 182b8a1b1ceSRoland Dreier return -EINVAL; 1831da177e4SLinus Torvalds } 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds static int ipoib_stop(struct net_device *dev) 1861da177e4SLinus Torvalds { 187c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds ipoib_dbg(priv, "stopping interface\n"); 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds netif_stop_queue(dev); 1941da177e4SLinus Torvalds 195efc82eeeSDoug Ledford ipoib_ib_dev_down(dev); 196cd565b4bSErez Shitrit ipoib_ib_dev_stop(dev); 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 1991da177e4SLinus Torvalds struct ipoib_dev_priv *cpriv; 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvalds /* Bring down any child interfaces too */ 202f47944ccSErez Shitrit down_read(&priv->vlan_rwsem); 2031da177e4SLinus Torvalds list_for_each_entry(cpriv, &priv->child_intfs, list) { 2041da177e4SLinus Torvalds int flags; 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds flags = cpriv->dev->flags; 2071da177e4SLinus Torvalds if (!(flags & IFF_UP)) 2081da177e4SLinus Torvalds continue; 2091da177e4SLinus Torvalds 210567c5e13SPetr Machata dev_change_flags(cpriv->dev, flags & ~IFF_UP, NULL); 2111da177e4SLinus Torvalds } 212f47944ccSErez Shitrit up_read(&priv->vlan_rwsem); 2131da177e4SLinus Torvalds } 2141da177e4SLinus Torvalds 2151da177e4SLinus Torvalds return 0; 2161da177e4SLinus Torvalds } 2171da177e4SLinus Torvalds 2189ca36f7dSDavid S. Miller static netdev_features_t ipoib_fix_features(struct net_device *dev, netdev_features_t features) 2193d96c74dSMichał Mirosław { 220c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 2213d96c74dSMichał Mirosław 2223d96c74dSMichał Mirosław if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags)) 223c4268778SYuval Shaia features &= ~(NETIF_F_IP_CSUM | NETIF_F_TSO); 2243d96c74dSMichał Mirosław 2253d96c74dSMichał Mirosław return features; 2263d96c74dSMichał Mirosław } 2273d96c74dSMichał Mirosław 2281da177e4SLinus Torvalds static int ipoib_change_mtu(struct net_device *dev, int new_mtu) 2291da177e4SLinus Torvalds { 230c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 231ed7b521dSErez Shitrit int ret = 0; 2321da177e4SLinus Torvalds 233839fcabaSMichael S. Tsirkin /* dev->mtu > 2K ==> connected mode */ 234586a6934SPradeep Satyanarayana if (ipoib_cm_admin_enabled(dev)) { 235586a6934SPradeep Satyanarayana if (new_mtu > ipoib_cm_max_mtu(dev)) 236586a6934SPradeep Satyanarayana return -EINVAL; 237586a6934SPradeep Satyanarayana 238839fcabaSMichael S. Tsirkin if (new_mtu > priv->mcast_mtu) 239839fcabaSMichael S. Tsirkin ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", 240839fcabaSMichael S. Tsirkin priv->mcast_mtu); 241586a6934SPradeep Satyanarayana 242839fcabaSMichael S. Tsirkin dev->mtu = new_mtu; 243839fcabaSMichael S. Tsirkin return 0; 244839fcabaSMichael S. Tsirkin } 245839fcabaSMichael S. Tsirkin 246142a9c28SMuhammad Sammar if (new_mtu < (ETH_MIN_MTU + IPOIB_ENCAP_LEN) || 247142a9c28SMuhammad Sammar new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu)) 2481da177e4SLinus Torvalds return -EINVAL; 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds priv->admin_mtu = new_mtu; 2511da177e4SLinus Torvalds 25229da686dSFeras Daoud if (priv->mcast_mtu < priv->admin_mtu) 25329da686dSFeras Daoud ipoib_dbg(priv, "MTU must be smaller than the underlying " 25429da686dSFeras Daoud "link layer MTU - 4 (%u)\n", priv->mcast_mtu); 25529da686dSFeras Daoud 256ed7b521dSErez Shitrit new_mtu = min(priv->mcast_mtu, priv->admin_mtu); 2571da177e4SLinus Torvalds 258ed7b521dSErez Shitrit if (priv->rn_ops->ndo_change_mtu) { 259ed7b521dSErez Shitrit bool carrier_status = netif_carrier_ok(dev); 260ed7b521dSErez Shitrit 261ed7b521dSErez Shitrit netif_carrier_off(dev); 262ed7b521dSErez Shitrit 263ed7b521dSErez Shitrit /* notify lower level on the real mtu */ 264ed7b521dSErez Shitrit ret = priv->rn_ops->ndo_change_mtu(dev, new_mtu); 265ed7b521dSErez Shitrit 266ed7b521dSErez Shitrit if (carrier_status) 267ed7b521dSErez Shitrit netif_carrier_on(dev); 268ed7b521dSErez Shitrit } else { 269ed7b521dSErez Shitrit dev->mtu = new_mtu; 270ed7b521dSErez Shitrit } 271ed7b521dSErez Shitrit 272ed7b521dSErez Shitrit return ret; 2731da177e4SLinus Torvalds } 2741da177e4SLinus Torvalds 275b6c871e5SErez Shitrit static void ipoib_get_stats(struct net_device *dev, 276b6c871e5SErez Shitrit struct rtnl_link_stats64 *stats) 277b6c871e5SErez Shitrit { 278b6c871e5SErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 279b6c871e5SErez Shitrit 280b6c871e5SErez Shitrit if (priv->rn_ops->ndo_get_stats64) 281b6c871e5SErez Shitrit priv->rn_ops->ndo_get_stats64(dev, stats); 282b6c871e5SErez Shitrit else 283b6c871e5SErez Shitrit netdev_stats_to_stats64(stats, &dev->stats); 284b6c871e5SErez Shitrit } 285b6c871e5SErez Shitrit 286ddde896eSGuy Shapiro /* Called with an RCU read lock taken */ 287ddde896eSGuy Shapiro static bool ipoib_is_dev_match_addr_rcu(const struct sockaddr *addr, 288ddde896eSGuy Shapiro struct net_device *dev) 289ddde896eSGuy Shapiro { 290ddde896eSGuy Shapiro struct net *net = dev_net(dev); 291ddde896eSGuy Shapiro struct in_device *in_dev; 292ddde896eSGuy Shapiro struct sockaddr_in *addr_in = (struct sockaddr_in *)addr; 293ddde896eSGuy Shapiro struct sockaddr_in6 *addr_in6 = (struct sockaddr_in6 *)addr; 294ddde896eSGuy Shapiro __be32 ret_addr; 295ddde896eSGuy Shapiro 296ddde896eSGuy Shapiro switch (addr->sa_family) { 297ddde896eSGuy Shapiro case AF_INET: 298ddde896eSGuy Shapiro in_dev = in_dev_get(dev); 299ddde896eSGuy Shapiro if (!in_dev) 300ddde896eSGuy Shapiro return false; 301ddde896eSGuy Shapiro 302ddde896eSGuy Shapiro ret_addr = inet_confirm_addr(net, in_dev, 0, 303ddde896eSGuy Shapiro addr_in->sin_addr.s_addr, 304ddde896eSGuy Shapiro RT_SCOPE_HOST); 305ddde896eSGuy Shapiro in_dev_put(in_dev); 306ddde896eSGuy Shapiro if (ret_addr) 307ddde896eSGuy Shapiro return true; 308ddde896eSGuy Shapiro 309ddde896eSGuy Shapiro break; 310ddde896eSGuy Shapiro case AF_INET6: 311ddde896eSGuy Shapiro if (IS_ENABLED(CONFIG_IPV6) && 312ddde896eSGuy Shapiro ipv6_chk_addr(net, &addr_in6->sin6_addr, dev, 1)) 313ddde896eSGuy Shapiro return true; 314ddde896eSGuy Shapiro 315ddde896eSGuy Shapiro break; 316ddde896eSGuy Shapiro } 317ddde896eSGuy Shapiro return false; 318ddde896eSGuy Shapiro } 319ddde896eSGuy Shapiro 320ddde896eSGuy Shapiro /** 321ddde896eSGuy Shapiro * Find the master net_device on top of the given net_device. 322ddde896eSGuy Shapiro * @dev: base IPoIB net_device 323ddde896eSGuy Shapiro * 324ddde896eSGuy Shapiro * Returns the master net_device with a reference held, or the same net_device 325ddde896eSGuy Shapiro * if no master exists. 326ddde896eSGuy Shapiro */ 327ddde896eSGuy Shapiro static struct net_device *ipoib_get_master_net_dev(struct net_device *dev) 328ddde896eSGuy Shapiro { 329ddde896eSGuy Shapiro struct net_device *master; 330ddde896eSGuy Shapiro 331ddde896eSGuy Shapiro rcu_read_lock(); 332ddde896eSGuy Shapiro master = netdev_master_upper_dev_get_rcu(dev); 333ddde896eSGuy Shapiro if (master) 334ddde896eSGuy Shapiro dev_hold(master); 335ddde896eSGuy Shapiro rcu_read_unlock(); 336ddde896eSGuy Shapiro 337ddde896eSGuy Shapiro if (master) 338ddde896eSGuy Shapiro return master; 339ddde896eSGuy Shapiro 340ddde896eSGuy Shapiro dev_hold(dev); 341ddde896eSGuy Shapiro return dev; 342ddde896eSGuy Shapiro } 343ddde896eSGuy Shapiro 344e0e79c8eSDavid Ahern struct ipoib_walk_data { 345e0e79c8eSDavid Ahern const struct sockaddr *addr; 346e0e79c8eSDavid Ahern struct net_device *result; 347e0e79c8eSDavid Ahern }; 348e0e79c8eSDavid Ahern 349e0e79c8eSDavid Ahern static int ipoib_upper_walk(struct net_device *upper, void *_data) 350e0e79c8eSDavid Ahern { 351e0e79c8eSDavid Ahern struct ipoib_walk_data *data = _data; 352e0e79c8eSDavid Ahern int ret = 0; 353e0e79c8eSDavid Ahern 354e0e79c8eSDavid Ahern if (ipoib_is_dev_match_addr_rcu(data->addr, upper)) { 355e0e79c8eSDavid Ahern dev_hold(upper); 356e0e79c8eSDavid Ahern data->result = upper; 357e0e79c8eSDavid Ahern ret = 1; 358e0e79c8eSDavid Ahern } 359e0e79c8eSDavid Ahern 360e0e79c8eSDavid Ahern return ret; 361e0e79c8eSDavid Ahern } 362e0e79c8eSDavid Ahern 363ddde896eSGuy Shapiro /** 364ddde896eSGuy Shapiro * Find a net_device matching the given address, which is an upper device of 365ddde896eSGuy Shapiro * the given net_device. 366ddde896eSGuy Shapiro * @addr: IP address to look for. 367ddde896eSGuy Shapiro * @dev: base IPoIB net_device 368ddde896eSGuy Shapiro * 369ddde896eSGuy Shapiro * If found, returns the net_device with a reference held. Otherwise return 370ddde896eSGuy Shapiro * NULL. 371ddde896eSGuy Shapiro */ 372ddde896eSGuy Shapiro static struct net_device *ipoib_get_net_dev_match_addr( 373ddde896eSGuy Shapiro const struct sockaddr *addr, struct net_device *dev) 374ddde896eSGuy Shapiro { 375e0e79c8eSDavid Ahern struct ipoib_walk_data data = { 376e0e79c8eSDavid Ahern .addr = addr, 377e0e79c8eSDavid Ahern }; 378ddde896eSGuy Shapiro 379ddde896eSGuy Shapiro rcu_read_lock(); 380ddde896eSGuy Shapiro if (ipoib_is_dev_match_addr_rcu(addr, dev)) { 381ddde896eSGuy Shapiro dev_hold(dev); 382e0e79c8eSDavid Ahern data.result = dev; 383ddde896eSGuy Shapiro goto out; 384ddde896eSGuy Shapiro } 385ddde896eSGuy Shapiro 386e0e79c8eSDavid Ahern netdev_walk_all_upper_dev_rcu(dev, ipoib_upper_walk, &data); 387ddde896eSGuy Shapiro out: 388ddde896eSGuy Shapiro rcu_read_unlock(); 389e0e79c8eSDavid Ahern return data.result; 390ddde896eSGuy Shapiro } 391ddde896eSGuy Shapiro 392ddde896eSGuy Shapiro /* returns the number of IPoIB netdevs on top a given ipoib device matching a 393ddde896eSGuy Shapiro * pkey_index and address, if one exists. 394ddde896eSGuy Shapiro * 395ddde896eSGuy Shapiro * @found_net_dev: contains a matching net_device if the return value >= 1, 396ddde896eSGuy Shapiro * with a reference held. */ 397ddde896eSGuy Shapiro static int ipoib_match_gid_pkey_addr(struct ipoib_dev_priv *priv, 398ddde896eSGuy Shapiro const union ib_gid *gid, 399ddde896eSGuy Shapiro u16 pkey_index, 400ddde896eSGuy Shapiro const struct sockaddr *addr, 401ddde896eSGuy Shapiro int nesting, 402ddde896eSGuy Shapiro struct net_device **found_net_dev) 403ddde896eSGuy Shapiro { 404ddde896eSGuy Shapiro struct ipoib_dev_priv *child_priv; 405ddde896eSGuy Shapiro struct net_device *net_dev = NULL; 406ddde896eSGuy Shapiro int matches = 0; 407ddde896eSGuy Shapiro 408ddde896eSGuy Shapiro if (priv->pkey_index == pkey_index && 409ddde896eSGuy Shapiro (!gid || !memcmp(gid, &priv->local_gid, sizeof(*gid)))) { 410ddde896eSGuy Shapiro if (!addr) { 411ddde896eSGuy Shapiro net_dev = ipoib_get_master_net_dev(priv->dev); 412ddde896eSGuy Shapiro } else { 413ddde896eSGuy Shapiro /* Verify the net_device matches the IP address, as 414ddde896eSGuy Shapiro * IPoIB child devices currently share a GID. */ 415ddde896eSGuy Shapiro net_dev = ipoib_get_net_dev_match_addr(addr, priv->dev); 416ddde896eSGuy Shapiro } 417ddde896eSGuy Shapiro if (net_dev) { 418ddde896eSGuy Shapiro if (!*found_net_dev) 419ddde896eSGuy Shapiro *found_net_dev = net_dev; 420ddde896eSGuy Shapiro else 421ddde896eSGuy Shapiro dev_put(net_dev); 422ddde896eSGuy Shapiro ++matches; 423ddde896eSGuy Shapiro } 424ddde896eSGuy Shapiro } 425ddde896eSGuy Shapiro 426ddde896eSGuy Shapiro /* Check child interfaces */ 427ddde896eSGuy Shapiro down_read_nested(&priv->vlan_rwsem, nesting); 428ddde896eSGuy Shapiro list_for_each_entry(child_priv, &priv->child_intfs, list) { 429ddde896eSGuy Shapiro matches += ipoib_match_gid_pkey_addr(child_priv, gid, 430ddde896eSGuy Shapiro pkey_index, addr, 431ddde896eSGuy Shapiro nesting + 1, 432ddde896eSGuy Shapiro found_net_dev); 433ddde896eSGuy Shapiro if (matches > 1) 434ddde896eSGuy Shapiro break; 435ddde896eSGuy Shapiro } 436ddde896eSGuy Shapiro up_read(&priv->vlan_rwsem); 437ddde896eSGuy Shapiro 438ddde896eSGuy Shapiro return matches; 439ddde896eSGuy Shapiro } 440ddde896eSGuy Shapiro 441ddde896eSGuy Shapiro /* Returns the number of matching net_devs found (between 0 and 2). Also 442ddde896eSGuy Shapiro * return the matching net_device in the @net_dev parameter, holding a 443ddde896eSGuy Shapiro * reference to the net_device, if the number of matches >= 1 */ 444ddde896eSGuy Shapiro static int __ipoib_get_net_dev_by_params(struct list_head *dev_list, u8 port, 445ddde896eSGuy Shapiro u16 pkey_index, 446ddde896eSGuy Shapiro const union ib_gid *gid, 447ddde896eSGuy Shapiro const struct sockaddr *addr, 448ddde896eSGuy Shapiro struct net_device **net_dev) 449ddde896eSGuy Shapiro { 450ddde896eSGuy Shapiro struct ipoib_dev_priv *priv; 451ddde896eSGuy Shapiro int matches = 0; 452ddde896eSGuy Shapiro 453ddde896eSGuy Shapiro *net_dev = NULL; 454ddde896eSGuy Shapiro 455ddde896eSGuy Shapiro list_for_each_entry(priv, dev_list, list) { 456ddde896eSGuy Shapiro if (priv->port != port) 457ddde896eSGuy Shapiro continue; 458ddde896eSGuy Shapiro 459ddde896eSGuy Shapiro matches += ipoib_match_gid_pkey_addr(priv, gid, pkey_index, 460ddde896eSGuy Shapiro addr, 0, net_dev); 461ddde896eSGuy Shapiro if (matches > 1) 462ddde896eSGuy Shapiro break; 463ddde896eSGuy Shapiro } 464ddde896eSGuy Shapiro 465ddde896eSGuy Shapiro return matches; 466ddde896eSGuy Shapiro } 467ddde896eSGuy Shapiro 468ddde896eSGuy Shapiro static struct net_device *ipoib_get_net_dev_by_params( 469ddde896eSGuy Shapiro struct ib_device *dev, u8 port, u16 pkey, 470ddde896eSGuy Shapiro const union ib_gid *gid, const struct sockaddr *addr, 471ddde896eSGuy Shapiro void *client_data) 472ddde896eSGuy Shapiro { 473ddde896eSGuy Shapiro struct net_device *net_dev; 474ddde896eSGuy Shapiro struct list_head *dev_list = client_data; 475ddde896eSGuy Shapiro u16 pkey_index; 476ddde896eSGuy Shapiro int matches; 477ddde896eSGuy Shapiro int ret; 478ddde896eSGuy Shapiro 479ddde896eSGuy Shapiro if (!rdma_protocol_ib(dev, port)) 480ddde896eSGuy Shapiro return NULL; 481ddde896eSGuy Shapiro 482ddde896eSGuy Shapiro ret = ib_find_cached_pkey(dev, port, pkey, &pkey_index); 483ddde896eSGuy Shapiro if (ret) 484ddde896eSGuy Shapiro return NULL; 485ddde896eSGuy Shapiro 486ddde896eSGuy Shapiro if (!dev_list) 487ddde896eSGuy Shapiro return NULL; 488ddde896eSGuy Shapiro 489ddde896eSGuy Shapiro /* See if we can find a unique device matching the L2 parameters */ 490ddde896eSGuy Shapiro matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index, 491ddde896eSGuy Shapiro gid, NULL, &net_dev); 492ddde896eSGuy Shapiro 493ddde896eSGuy Shapiro switch (matches) { 494ddde896eSGuy Shapiro case 0: 495ddde896eSGuy Shapiro return NULL; 496ddde896eSGuy Shapiro case 1: 497ddde896eSGuy Shapiro return net_dev; 498ddde896eSGuy Shapiro } 499ddde896eSGuy Shapiro 500ddde896eSGuy Shapiro dev_put(net_dev); 501ddde896eSGuy Shapiro 502ddde896eSGuy Shapiro /* Couldn't find a unique device with L2 parameters only. Use L3 503ddde896eSGuy Shapiro * address to uniquely match the net device */ 504ddde896eSGuy Shapiro matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index, 505ddde896eSGuy Shapiro gid, addr, &net_dev); 506ddde896eSGuy Shapiro switch (matches) { 507ddde896eSGuy Shapiro case 0: 508ddde896eSGuy Shapiro return NULL; 509ddde896eSGuy Shapiro default: 510ddde896eSGuy Shapiro dev_warn_ratelimited(&dev->dev, 511ddde896eSGuy Shapiro "duplicate IP address detected\n"); 512ddde896eSGuy Shapiro /* Fall through */ 513ddde896eSGuy Shapiro case 1: 514ddde896eSGuy Shapiro return net_dev; 515ddde896eSGuy Shapiro } 516ddde896eSGuy Shapiro } 517ddde896eSGuy Shapiro 51871d9c5f9SRoland Dreier int ipoib_set_mode(struct net_device *dev, const char *buf) 51971d9c5f9SRoland Dreier { 520c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 52171d9c5f9SRoland Dreier 52280b5b35aSFeras Daoud if ((test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags) && 52380b5b35aSFeras Daoud !strcmp(buf, "connected\n")) || 52480b5b35aSFeras Daoud (!test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags) && 52580b5b35aSFeras Daoud !strcmp(buf, "datagram\n"))) { 52680b5b35aSFeras Daoud return 0; 52780b5b35aSFeras Daoud } 52880b5b35aSFeras Daoud 52971d9c5f9SRoland Dreier /* flush paths if we switch modes so that connections are restarted */ 53071d9c5f9SRoland Dreier if (IPOIB_CM_SUPPORTED(dev->dev_addr) && !strcmp(buf, "connected\n")) { 53171d9c5f9SRoland Dreier set_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); 53271d9c5f9SRoland Dreier ipoib_warn(priv, "enabling connected mode " 53371d9c5f9SRoland Dreier "will cause multicast packet drops\n"); 53471d9c5f9SRoland Dreier netdev_update_features(dev); 535edcd2a74SErez Shitrit dev_set_mtu(dev, ipoib_cm_max_mtu(dev)); 53671d9c5f9SRoland Dreier rtnl_unlock(); 537e622f2f4SChristoph Hellwig priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM; 53871d9c5f9SRoland Dreier 53971d9c5f9SRoland Dreier ipoib_flush_paths(dev); 5400a0007f2SFeras Daoud return (!rtnl_trylock()) ? -EBUSY : 0; 54171d9c5f9SRoland Dreier } 54271d9c5f9SRoland Dreier 54371d9c5f9SRoland Dreier if (!strcmp(buf, "datagram\n")) { 54471d9c5f9SRoland Dreier clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); 54571d9c5f9SRoland Dreier netdev_update_features(dev); 54671d9c5f9SRoland Dreier dev_set_mtu(dev, min(priv->mcast_mtu, dev->mtu)); 54771d9c5f9SRoland Dreier rtnl_unlock(); 54871d9c5f9SRoland Dreier ipoib_flush_paths(dev); 5490a0007f2SFeras Daoud return (!rtnl_trylock()) ? -EBUSY : 0; 55071d9c5f9SRoland Dreier } 55171d9c5f9SRoland Dreier 55271d9c5f9SRoland Dreier return -EINVAL; 55371d9c5f9SRoland Dreier } 55471d9c5f9SRoland Dreier 555546481c2SErez Shitrit struct ipoib_path *__path_find(struct net_device *dev, void *gid) 5561da177e4SLinus Torvalds { 557c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 5581da177e4SLinus Torvalds struct rb_node *n = priv->path_tree.rb_node; 5591da177e4SLinus Torvalds struct ipoib_path *path; 5601da177e4SLinus Torvalds int ret; 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds while (n) { 5631da177e4SLinus Torvalds path = rb_entry(n, struct ipoib_path, rb_node); 5641da177e4SLinus Torvalds 56537c22a77SJack Morgenstein ret = memcmp(gid, path->pathrec.dgid.raw, 5661da177e4SLinus Torvalds sizeof (union ib_gid)); 5671da177e4SLinus Torvalds 5681da177e4SLinus Torvalds if (ret < 0) 5691da177e4SLinus Torvalds n = n->rb_left; 5701da177e4SLinus Torvalds else if (ret > 0) 5711da177e4SLinus Torvalds n = n->rb_right; 5721da177e4SLinus Torvalds else 5731da177e4SLinus Torvalds return path; 5741da177e4SLinus Torvalds } 5751da177e4SLinus Torvalds 5761da177e4SLinus Torvalds return NULL; 5771da177e4SLinus Torvalds } 5781da177e4SLinus Torvalds 5791da177e4SLinus Torvalds static int __path_add(struct net_device *dev, struct ipoib_path *path) 5801da177e4SLinus Torvalds { 581c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 5821da177e4SLinus Torvalds struct rb_node **n = &priv->path_tree.rb_node; 5831da177e4SLinus Torvalds struct rb_node *pn = NULL; 5841da177e4SLinus Torvalds struct ipoib_path *tpath; 5851da177e4SLinus Torvalds int ret; 5861da177e4SLinus Torvalds 5871da177e4SLinus Torvalds while (*n) { 5881da177e4SLinus Torvalds pn = *n; 5891da177e4SLinus Torvalds tpath = rb_entry(pn, struct ipoib_path, rb_node); 5901da177e4SLinus Torvalds 5911da177e4SLinus Torvalds ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, 5921da177e4SLinus Torvalds sizeof (union ib_gid)); 5931da177e4SLinus Torvalds if (ret < 0) 5941da177e4SLinus Torvalds n = &pn->rb_left; 5951da177e4SLinus Torvalds else if (ret > 0) 5961da177e4SLinus Torvalds n = &pn->rb_right; 5971da177e4SLinus Torvalds else 5981da177e4SLinus Torvalds return -EEXIST; 5991da177e4SLinus Torvalds } 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds rb_link_node(&path->rb_node, pn, n); 6021da177e4SLinus Torvalds rb_insert_color(&path->rb_node, &priv->path_tree); 6031da177e4SLinus Torvalds 6041da177e4SLinus Torvalds list_add_tail(&path->list, &priv->path_list); 6051da177e4SLinus Torvalds 6061da177e4SLinus Torvalds return 0; 6071da177e4SLinus Torvalds } 6081da177e4SLinus Torvalds 6091da177e4SLinus Torvalds static void path_free(struct net_device *dev, struct ipoib_path *path) 6101da177e4SLinus Torvalds { 6111da177e4SLinus Torvalds struct sk_buff *skb; 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds while ((skb = __skb_dequeue(&path->queue))) 6141da177e4SLinus Torvalds dev_kfree_skb_irq(skb); 6151da177e4SLinus Torvalds 616c1048affSErez Shitrit ipoib_dbg(ipoib_priv(dev), "path_free\n"); 6171da177e4SLinus Torvalds 618b63b70d8SShlomo Pongratz /* remove all neigh connected to this path */ 619b63b70d8SShlomo Pongratz ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw); 6201da177e4SLinus Torvalds 6211da177e4SLinus Torvalds if (path->ah) 6221da177e4SLinus Torvalds ipoib_put_ah(path->ah); 6231da177e4SLinus Torvalds 6241da177e4SLinus Torvalds kfree(path); 6251da177e4SLinus Torvalds } 6261da177e4SLinus Torvalds 6271732b0efSRoland Dreier #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 6281732b0efSRoland Dreier 6291732b0efSRoland Dreier struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev) 6301732b0efSRoland Dreier { 6311732b0efSRoland Dreier struct ipoib_path_iter *iter; 6321732b0efSRoland Dreier 633b1b63970SKamal Heib iter = kmalloc(sizeof(*iter), GFP_KERNEL); 6341732b0efSRoland Dreier if (!iter) 6351732b0efSRoland Dreier return NULL; 6361732b0efSRoland Dreier 6371732b0efSRoland Dreier iter->dev = dev; 6381732b0efSRoland Dreier memset(iter->path.pathrec.dgid.raw, 0, 16); 6391732b0efSRoland Dreier 6401732b0efSRoland Dreier if (ipoib_path_iter_next(iter)) { 6411732b0efSRoland Dreier kfree(iter); 6421732b0efSRoland Dreier return NULL; 6431732b0efSRoland Dreier } 6441732b0efSRoland Dreier 6451732b0efSRoland Dreier return iter; 6461732b0efSRoland Dreier } 6471732b0efSRoland Dreier 6481732b0efSRoland Dreier int ipoib_path_iter_next(struct ipoib_path_iter *iter) 6491732b0efSRoland Dreier { 650c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(iter->dev); 6511732b0efSRoland Dreier struct rb_node *n; 6521732b0efSRoland Dreier struct ipoib_path *path; 6531732b0efSRoland Dreier int ret = 1; 6541732b0efSRoland Dreier 6551732b0efSRoland Dreier spin_lock_irq(&priv->lock); 6561732b0efSRoland Dreier 6571732b0efSRoland Dreier n = rb_first(&priv->path_tree); 6581732b0efSRoland Dreier 6591732b0efSRoland Dreier while (n) { 6601732b0efSRoland Dreier path = rb_entry(n, struct ipoib_path, rb_node); 6611732b0efSRoland Dreier 6621732b0efSRoland Dreier if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, 6631732b0efSRoland Dreier sizeof (union ib_gid)) < 0) { 6641732b0efSRoland Dreier iter->path = *path; 6651732b0efSRoland Dreier ret = 0; 6661732b0efSRoland Dreier break; 6671732b0efSRoland Dreier } 6681732b0efSRoland Dreier 6691732b0efSRoland Dreier n = rb_next(n); 6701732b0efSRoland Dreier } 6711732b0efSRoland Dreier 6721732b0efSRoland Dreier spin_unlock_irq(&priv->lock); 6731732b0efSRoland Dreier 6741732b0efSRoland Dreier return ret; 6751732b0efSRoland Dreier } 6761732b0efSRoland Dreier 6771732b0efSRoland Dreier void ipoib_path_iter_read(struct ipoib_path_iter *iter, 6781732b0efSRoland Dreier struct ipoib_path *path) 6791732b0efSRoland Dreier { 6801732b0efSRoland Dreier *path = iter->path; 6811732b0efSRoland Dreier } 6821732b0efSRoland Dreier 6831732b0efSRoland Dreier #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ 6841732b0efSRoland Dreier 685ee1e2c82SMoni Shoua void ipoib_mark_paths_invalid(struct net_device *dev) 686ee1e2c82SMoni Shoua { 687c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 688ee1e2c82SMoni Shoua struct ipoib_path *path, *tp; 689ee1e2c82SMoni Shoua 690ee1e2c82SMoni Shoua spin_lock_irq(&priv->lock); 691ee1e2c82SMoni Shoua 692ee1e2c82SMoni Shoua list_for_each_entry_safe(path, tp, &priv->path_list, list) { 69357520751SDasaratharaman Chandramouli ipoib_dbg(priv, "mark path LID 0x%08x GID %pI6 invalid\n", 69457520751SDasaratharaman Chandramouli be32_to_cpu(sa_path_get_dlid(&path->pathrec)), 695fcace2feSHarvey Harrison path->pathrec.dgid.raw); 696fa9391dbSDoug Ledford if (path->ah) 697fa9391dbSDoug Ledford path->ah->valid = 0; 698ee1e2c82SMoni Shoua } 699ee1e2c82SMoni Shoua 700ee1e2c82SMoni Shoua spin_unlock_irq(&priv->lock); 701ee1e2c82SMoni Shoua } 702ee1e2c82SMoni Shoua 7032b084176SErez Shitrit static void push_pseudo_header(struct sk_buff *skb, const char *daddr) 7042b084176SErez Shitrit { 7052b084176SErez Shitrit struct ipoib_pseudo_header *phdr; 7062b084176SErez Shitrit 707d58ff351SJohannes Berg phdr = skb_push(skb, sizeof(*phdr)); 7082b084176SErez Shitrit memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN); 7092b084176SErez Shitrit } 7102b084176SErez Shitrit 7111da177e4SLinus Torvalds void ipoib_flush_paths(struct net_device *dev) 7121da177e4SLinus Torvalds { 713c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 7141da177e4SLinus Torvalds struct ipoib_path *path, *tp; 7151da177e4SLinus Torvalds LIST_HEAD(remove_list); 716943c246eSRoland Dreier unsigned long flags; 7171da177e4SLinus Torvalds 718943c246eSRoland Dreier netif_tx_lock_bh(dev); 719943c246eSRoland Dreier spin_lock_irqsave(&priv->lock, flags); 7201da177e4SLinus Torvalds 721157de229SRobert P. J. Day list_splice_init(&priv->path_list, &remove_list); 7221da177e4SLinus Torvalds 7231da177e4SLinus Torvalds list_for_each_entry(path, &remove_list, list) 7241da177e4SLinus Torvalds rb_erase(&path->rb_node, &priv->path_tree); 7251da177e4SLinus Torvalds 7261da177e4SLinus Torvalds list_for_each_entry_safe(path, tp, &remove_list, list) { 7271da177e4SLinus Torvalds if (path->query) 7281da177e4SLinus Torvalds ib_sa_cancel_query(path->query_id, path->query); 729943c246eSRoland Dreier spin_unlock_irqrestore(&priv->lock, flags); 730943c246eSRoland Dreier netif_tx_unlock_bh(dev); 7311da177e4SLinus Torvalds wait_for_completion(&path->done); 7321da177e4SLinus Torvalds path_free(dev, path); 733943c246eSRoland Dreier netif_tx_lock_bh(dev); 734943c246eSRoland Dreier spin_lock_irqsave(&priv->lock, flags); 7351da177e4SLinus Torvalds } 736943c246eSRoland Dreier 737943c246eSRoland Dreier spin_unlock_irqrestore(&priv->lock, flags); 738943c246eSRoland Dreier netif_tx_unlock_bh(dev); 7391da177e4SLinus Torvalds } 7401da177e4SLinus Torvalds 7411da177e4SLinus Torvalds static void path_rec_completion(int status, 742c2f8fc4eSDasaratharaman Chandramouli struct sa_path_rec *pathrec, 7431da177e4SLinus Torvalds void *path_ptr) 7441da177e4SLinus Torvalds { 7451da177e4SLinus Torvalds struct ipoib_path *path = path_ptr; 7461da177e4SLinus Torvalds struct net_device *dev = path->dev; 747c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 7481da177e4SLinus Torvalds struct ipoib_ah *ah = NULL; 749c9da4badSRoland Dreier struct ipoib_ah *old_ah = NULL; 750d04d01b1SMichael S. Tsirkin struct ipoib_neigh *neigh, *tn; 7511da177e4SLinus Torvalds struct sk_buff_head skqueue; 7521da177e4SLinus Torvalds struct sk_buff *skb; 7531da177e4SLinus Torvalds unsigned long flags; 7541da177e4SLinus Torvalds 755843613b0SRoland Dreier if (!status) 7565b095d98SHarvey Harrison ipoib_dbg(priv, "PathRec LID 0x%04x for GID %pI6\n", 75757520751SDasaratharaman Chandramouli be32_to_cpu(sa_path_get_dlid(pathrec)), 7589fdca4daSDasaratharaman Chandramouli pathrec->dgid.raw); 7591da177e4SLinus Torvalds else 7605b095d98SHarvey Harrison ipoib_dbg(priv, "PathRec status %d for GID %pI6\n", 761fcace2feSHarvey Harrison status, path->pathrec.dgid.raw); 7621da177e4SLinus Torvalds 7631da177e4SLinus Torvalds skb_queue_head_init(&skqueue); 7641da177e4SLinus Torvalds 7651da177e4SLinus Torvalds if (!status) { 76690898850SDasaratharaman Chandramouli struct rdma_ah_attr av; 7671da177e4SLinus Torvalds 7684ad6a024SParav Pandit if (!ib_init_ah_attr_from_path(priv->ca, priv->port, 76939839107SParav Pandit pathrec, &av, NULL)) { 7701da177e4SLinus Torvalds ah = ipoib_create_ah(dev, priv->pd, &av); 771aa74f487SParav Pandit rdma_destroy_ah_attr(&av); 772aa74f487SParav Pandit } 7731da177e4SLinus Torvalds } 7741da177e4SLinus Torvalds 7751da177e4SLinus Torvalds spin_lock_irqsave(&priv->lock, flags); 7761da177e4SLinus Torvalds 7773874397cSMike Marciniszyn if (!IS_ERR_OR_NULL(ah)) { 77843900089SErez Shitrit /* 77943900089SErez Shitrit * pathrec.dgid is used as the database key from the LLADDR, 78043900089SErez Shitrit * it must remain unchanged even if the SA returns a different 78143900089SErez Shitrit * GID to use in the AH. 78243900089SErez Shitrit */ 78343900089SErez Shitrit if (memcmp(pathrec->dgid.raw, path->pathrec.dgid.raw, 78443900089SErez Shitrit sizeof(union ib_gid))) { 78543900089SErez Shitrit ipoib_dbg( 78643900089SErez Shitrit priv, 78743900089SErez Shitrit "%s got PathRec for gid %pI6 while asked for %pI6\n", 78843900089SErez Shitrit dev->name, pathrec->dgid.raw, 78943900089SErez Shitrit path->pathrec.dgid.raw); 79043900089SErez Shitrit memcpy(pathrec->dgid.raw, path->pathrec.dgid.raw, 79143900089SErez Shitrit sizeof(union ib_gid)); 79243900089SErez Shitrit } 79343900089SErez Shitrit 7941da177e4SLinus Torvalds path->pathrec = *pathrec; 7951da177e4SLinus Torvalds 796c9da4badSRoland Dreier old_ah = path->ah; 797c9da4badSRoland Dreier path->ah = ah; 798c9da4badSRoland Dreier 7991da177e4SLinus Torvalds ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", 80057520751SDasaratharaman Chandramouli ah, be32_to_cpu(sa_path_get_dlid(pathrec)), 8019fdca4daSDasaratharaman Chandramouli pathrec->sl); 8021da177e4SLinus Torvalds 8031da177e4SLinus Torvalds while ((skb = __skb_dequeue(&path->queue))) 8041da177e4SLinus Torvalds __skb_queue_tail(&skqueue, skb); 8051da177e4SLinus Torvalds 806d04d01b1SMichael S. Tsirkin list_for_each_entry_safe(neigh, tn, &path->neigh_list, list) { 807ee1e2c82SMoni Shoua if (neigh->ah) { 808ee1e2c82SMoni Shoua WARN_ON(neigh->ah != old_ah); 809ee1e2c82SMoni Shoua /* 810ee1e2c82SMoni Shoua * Dropping the ah reference inside 811ee1e2c82SMoni Shoua * priv->lock is safe here, because we 812ee1e2c82SMoni Shoua * will hold one more reference from 813ee1e2c82SMoni Shoua * the original value of path->ah (ie 814ee1e2c82SMoni Shoua * old_ah). 815ee1e2c82SMoni Shoua */ 816ee1e2c82SMoni Shoua ipoib_put_ah(neigh->ah); 817ee1e2c82SMoni Shoua } 8181da177e4SLinus Torvalds kref_get(&path->ah->ref); 8191da177e4SLinus Torvalds neigh->ah = path->ah; 8201da177e4SLinus Torvalds 821b63b70d8SShlomo Pongratz if (ipoib_cm_enabled(dev, neigh->daddr)) { 822839fcabaSMichael S. Tsirkin if (!ipoib_cm_get(neigh)) 823839fcabaSMichael S. Tsirkin ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, 824839fcabaSMichael S. Tsirkin path, 825839fcabaSMichael S. Tsirkin neigh)); 826839fcabaSMichael S. Tsirkin if (!ipoib_cm_get(neigh)) { 827b63b70d8SShlomo Pongratz ipoib_neigh_free(neigh); 828839fcabaSMichael S. Tsirkin continue; 829839fcabaSMichael S. Tsirkin } 830839fcabaSMichael S. Tsirkin } 831839fcabaSMichael S. Tsirkin 8321da177e4SLinus Torvalds while ((skb = __skb_dequeue(&neigh->queue))) 8331da177e4SLinus Torvalds __skb_queue_tail(&skqueue, skb); 8341da177e4SLinus Torvalds } 835fa9391dbSDoug Ledford path->ah->valid = 1; 8365872a9fcSRoland Dreier } 8371da177e4SLinus Torvalds 8385872a9fcSRoland Dreier path->query = NULL; 8391da177e4SLinus Torvalds complete(&path->done); 8401da177e4SLinus Torvalds 8411da177e4SLinus Torvalds spin_unlock_irqrestore(&priv->lock, flags); 8421da177e4SLinus Torvalds 843f72dd566SRoland Dreier if (IS_ERR_OR_NULL(ah)) 844f72dd566SRoland Dreier ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw); 845f72dd566SRoland Dreier 846ee1e2c82SMoni Shoua if (old_ah) 847ee1e2c82SMoni Shoua ipoib_put_ah(old_ah); 848ee1e2c82SMoni Shoua 8491da177e4SLinus Torvalds while ((skb = __skb_dequeue(&skqueue))) { 850d32b9a81SFeras Daoud int ret; 8511da177e4SLinus Torvalds skb->dev = dev; 852d32b9a81SFeras Daoud ret = dev_queue_xmit(skb); 853d32b9a81SFeras Daoud if (ret) 854d32b9a81SFeras Daoud ipoib_warn(priv, "%s: dev_queue_xmit failed to re-queue packet, ret:%d\n", 855d32b9a81SFeras Daoud __func__, ret); 8561da177e4SLinus Torvalds } 8571da177e4SLinus Torvalds } 8581da177e4SLinus Torvalds 85998aebc55SErez Shitrit static void init_path_rec(struct ipoib_dev_priv *priv, struct ipoib_path *path, 86098aebc55SErez Shitrit void *gid) 86198aebc55SErez Shitrit { 86298aebc55SErez Shitrit path->dev = priv->dev; 86398aebc55SErez Shitrit 86498aebc55SErez Shitrit if (rdma_cap_opa_ah(priv->ca, priv->port)) 86598aebc55SErez Shitrit path->pathrec.rec_type = SA_PATH_REC_TYPE_OPA; 86698aebc55SErez Shitrit else 86798aebc55SErez Shitrit path->pathrec.rec_type = SA_PATH_REC_TYPE_IB; 86898aebc55SErez Shitrit 86998aebc55SErez Shitrit memcpy(path->pathrec.dgid.raw, gid, sizeof(union ib_gid)); 87098aebc55SErez Shitrit path->pathrec.sgid = priv->local_gid; 87198aebc55SErez Shitrit path->pathrec.pkey = cpu_to_be16(priv->pkey); 87298aebc55SErez Shitrit path->pathrec.numb_path = 1; 87398aebc55SErez Shitrit path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class; 87498aebc55SErez Shitrit } 87598aebc55SErez Shitrit 87637c22a77SJack Morgenstein static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid) 8771da177e4SLinus Torvalds { 878c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 8791da177e4SLinus Torvalds struct ipoib_path *path; 8801da177e4SLinus Torvalds 8811401b53aSJack Morgenstein if (!priv->broadcast) 8821401b53aSJack Morgenstein return NULL; 8831401b53aSJack Morgenstein 884b1b63970SKamal Heib path = kzalloc(sizeof(*path), GFP_ATOMIC); 8851da177e4SLinus Torvalds if (!path) 8861da177e4SLinus Torvalds return NULL; 8871da177e4SLinus Torvalds 8881da177e4SLinus Torvalds skb_queue_head_init(&path->queue); 8891da177e4SLinus Torvalds 8901da177e4SLinus Torvalds INIT_LIST_HEAD(&path->neigh_list); 8911da177e4SLinus Torvalds 89298aebc55SErez Shitrit init_path_rec(priv, path, gid); 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds return path; 8951da177e4SLinus Torvalds } 8961da177e4SLinus Torvalds 8971da177e4SLinus Torvalds static int path_rec_start(struct net_device *dev, 8981da177e4SLinus Torvalds struct ipoib_path *path) 8991da177e4SLinus Torvalds { 900c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 9011da177e4SLinus Torvalds 9025b095d98SHarvey Harrison ipoib_dbg(priv, "Start path record lookup for %pI6\n", 903fcace2feSHarvey Harrison path->pathrec.dgid.raw); 9041da177e4SLinus Torvalds 90565c7eddaSRoland Dreier init_completion(&path->done); 90665c7eddaSRoland Dreier 9071da177e4SLinus Torvalds path->query_id = 908c1a0b23bSMichael S. Tsirkin ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, 9091da177e4SLinus Torvalds &path->pathrec, 9101da177e4SLinus Torvalds IB_SA_PATH_REC_DGID | 9111da177e4SLinus Torvalds IB_SA_PATH_REC_SGID | 9121da177e4SLinus Torvalds IB_SA_PATH_REC_NUMB_PATH | 91381668838SSean Hefty IB_SA_PATH_REC_TRAFFIC_CLASS | 9141da177e4SLinus Torvalds IB_SA_PATH_REC_PKEY, 9151da177e4SLinus Torvalds 1000, GFP_ATOMIC, 9161da177e4SLinus Torvalds path_rec_completion, 9171da177e4SLinus Torvalds path, &path->query); 9181da177e4SLinus Torvalds if (path->query_id < 0) { 91901b3fc8bSOr Gerlitz ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id); 9201da177e4SLinus Torvalds path->query = NULL; 92193a3ab93SYossi Etigin complete(&path->done); 9221da177e4SLinus Torvalds return path->query_id; 9231da177e4SLinus Torvalds } 9241da177e4SLinus Torvalds 9251da177e4SLinus Torvalds return 0; 9261da177e4SLinus Torvalds } 9271da177e4SLinus Torvalds 928fa9391dbSDoug Ledford static void neigh_refresh_path(struct ipoib_neigh *neigh, u8 *daddr, 929fa9391dbSDoug Ledford struct net_device *dev) 930fa9391dbSDoug Ledford { 931fa9391dbSDoug Ledford struct ipoib_dev_priv *priv = ipoib_priv(dev); 932fa9391dbSDoug Ledford struct ipoib_path *path; 933fa9391dbSDoug Ledford unsigned long flags; 934fa9391dbSDoug Ledford 935fa9391dbSDoug Ledford spin_lock_irqsave(&priv->lock, flags); 936fa9391dbSDoug Ledford 937fa9391dbSDoug Ledford path = __path_find(dev, daddr + 4); 938fa9391dbSDoug Ledford if (!path) 939fa9391dbSDoug Ledford goto out; 940fa9391dbSDoug Ledford if (!path->query) 941fa9391dbSDoug Ledford path_rec_start(dev, path); 942fa9391dbSDoug Ledford out: 943fa9391dbSDoug Ledford spin_unlock_irqrestore(&priv->lock, flags); 944fa9391dbSDoug Ledford } 945fa9391dbSDoug Ledford 94616ba3defSErez Shitrit static struct ipoib_neigh *neigh_add_path(struct sk_buff *skb, u8 *daddr, 947b63b70d8SShlomo Pongratz struct net_device *dev) 9481da177e4SLinus Torvalds { 949c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 950cd565b4bSErez Shitrit struct rdma_netdev *rn = netdev_priv(dev); 9511da177e4SLinus Torvalds struct ipoib_path *path; 9521da177e4SLinus Torvalds struct ipoib_neigh *neigh; 953943c246eSRoland Dreier unsigned long flags; 9541da177e4SLinus Torvalds 955b5120a6eSShlomo Pongratz spin_lock_irqsave(&priv->lock, flags); 956b63b70d8SShlomo Pongratz neigh = ipoib_neigh_alloc(daddr, dev); 9571da177e4SLinus Torvalds if (!neigh) { 958b5120a6eSShlomo Pongratz spin_unlock_irqrestore(&priv->lock, flags); 959de903512SRoland Dreier ++dev->stats.tx_dropped; 9601da177e4SLinus Torvalds dev_kfree_skb_any(skb); 96116ba3defSErez Shitrit return NULL; 96216ba3defSErez Shitrit } 96316ba3defSErez Shitrit 96416ba3defSErez Shitrit /* To avoid race condition, make sure that the 96516ba3defSErez Shitrit * neigh will be added only once. 96616ba3defSErez Shitrit */ 96716ba3defSErez Shitrit if (unlikely(!list_empty(&neigh->list))) { 96816ba3defSErez Shitrit spin_unlock_irqrestore(&priv->lock, flags); 96916ba3defSErez Shitrit return neigh; 9701da177e4SLinus Torvalds } 9711da177e4SLinus Torvalds 972b63b70d8SShlomo Pongratz path = __path_find(dev, daddr + 4); 9731da177e4SLinus Torvalds if (!path) { 974b63b70d8SShlomo Pongratz path = path_rec_create(dev, daddr + 4); 9751da177e4SLinus Torvalds if (!path) 976d2e0655eSMichael S. Tsirkin goto err_path; 9771da177e4SLinus Torvalds 9781da177e4SLinus Torvalds __path_add(dev, path); 9791da177e4SLinus Torvalds } 9801da177e4SLinus Torvalds 9811da177e4SLinus Torvalds list_add_tail(&neigh->list, &path->neigh_list); 9821da177e4SLinus Torvalds 983fa9391dbSDoug Ledford if (path->ah && path->ah->valid) { 9841da177e4SLinus Torvalds kref_get(&path->ah->ref); 9851da177e4SLinus Torvalds neigh->ah = path->ah; 9861da177e4SLinus Torvalds 987b63b70d8SShlomo Pongratz if (ipoib_cm_enabled(dev, neigh->daddr)) { 988839fcabaSMichael S. Tsirkin if (!ipoib_cm_get(neigh)) 989839fcabaSMichael S. Tsirkin ipoib_cm_set(neigh, ipoib_cm_create_tx(dev, path, neigh)); 990839fcabaSMichael S. Tsirkin if (!ipoib_cm_get(neigh)) { 991b63b70d8SShlomo Pongratz ipoib_neigh_free(neigh); 992839fcabaSMichael S. Tsirkin goto err_drop; 993839fcabaSMichael S. Tsirkin } 994fc791b63SPaolo Abeni if (skb_queue_len(&neigh->queue) < 995fc791b63SPaolo Abeni IPOIB_MAX_PATH_REC_QUEUE) { 9962b084176SErez Shitrit push_pseudo_header(skb, neigh->daddr); 997839fcabaSMichael S. Tsirkin __skb_queue_tail(&neigh->queue, skb); 998fc791b63SPaolo Abeni } else { 999839fcabaSMichael S. Tsirkin ipoib_warn(priv, "queue length limit %d. Packet drop.\n", 1000839fcabaSMichael S. Tsirkin skb_queue_len(&neigh->queue)); 1001839fcabaSMichael S. Tsirkin goto err_drop; 1002839fcabaSMichael S. Tsirkin } 1003721d67cdSRoland Dreier } else { 1004721d67cdSRoland Dreier spin_unlock_irqrestore(&priv->lock, flags); 1005cd565b4bSErez Shitrit path->ah->last_send = rn->send(dev, skb, path->ah->ah, 1006cd565b4bSErez Shitrit IPOIB_QPN(daddr)); 1007b63b70d8SShlomo Pongratz ipoib_neigh_put(neigh); 100816ba3defSErez Shitrit return NULL; 1009721d67cdSRoland Dreier } 10101da177e4SLinus Torvalds } else { 10111da177e4SLinus Torvalds neigh->ah = NULL; 10121da177e4SLinus Torvalds 10131da177e4SLinus Torvalds if (!path->query && path_rec_start(dev, path)) 101449b8e744SJim Foraker goto err_path; 10152b084176SErez Shitrit if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { 10162b084176SErez Shitrit push_pseudo_header(skb, neigh->daddr); 10172745b5b7SMichael S. Tsirkin __skb_queue_tail(&neigh->queue, skb); 10182b084176SErez Shitrit } else { 10191e85b806SErez Shitrit goto err_drop; 10201da177e4SLinus Torvalds } 10212b084176SErez Shitrit } 10221da177e4SLinus Torvalds 1023943c246eSRoland Dreier spin_unlock_irqrestore(&priv->lock, flags); 1024b63b70d8SShlomo Pongratz ipoib_neigh_put(neigh); 102516ba3defSErez Shitrit return NULL; 10261da177e4SLinus Torvalds 1027d2e0655eSMichael S. Tsirkin err_path: 1028b63b70d8SShlomo Pongratz ipoib_neigh_free(neigh); 1029839fcabaSMichael S. Tsirkin err_drop: 1030de903512SRoland Dreier ++dev->stats.tx_dropped; 10311da177e4SLinus Torvalds dev_kfree_skb_any(skb); 10321da177e4SLinus Torvalds 1033943c246eSRoland Dreier spin_unlock_irqrestore(&priv->lock, flags); 1034b63b70d8SShlomo Pongratz ipoib_neigh_put(neigh); 103516ba3defSErez Shitrit 103616ba3defSErez Shitrit return NULL; 10371da177e4SLinus Torvalds } 10381da177e4SLinus Torvalds 10391da177e4SLinus Torvalds static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, 1040fc791b63SPaolo Abeni struct ipoib_pseudo_header *phdr) 10411da177e4SLinus Torvalds { 1042c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 1043cd565b4bSErez Shitrit struct rdma_netdev *rn = netdev_priv(dev); 10441da177e4SLinus Torvalds struct ipoib_path *path; 1045943c246eSRoland Dreier unsigned long flags; 10461da177e4SLinus Torvalds 1047943c246eSRoland Dreier spin_lock_irqsave(&priv->lock, flags); 10481da177e4SLinus Torvalds 104998aebc55SErez Shitrit /* no broadcast means that all paths are (going to be) not valid */ 105098aebc55SErez Shitrit if (!priv->broadcast) 105198aebc55SErez Shitrit goto drop_and_unlock; 105298aebc55SErez Shitrit 1053fc791b63SPaolo Abeni path = __path_find(dev, phdr->hwaddr + 4); 1054fa9391dbSDoug Ledford if (!path || !path->ah || !path->ah->valid) { 105571d98b46SJack Morgenstein if (!path) { 1056fc791b63SPaolo Abeni path = path_rec_create(dev, phdr->hwaddr + 4); 105715517080SEvgenii Smirnov if (!path) 105815517080SEvgenii Smirnov goto drop_and_unlock; 105915517080SEvgenii Smirnov __path_add(dev, path); 106015517080SEvgenii Smirnov } else { 106115517080SEvgenii Smirnov /* 106215517080SEvgenii Smirnov * make sure there are no changes in the existing 106315517080SEvgenii Smirnov * path record 106415517080SEvgenii Smirnov */ 106598aebc55SErez Shitrit init_path_rec(priv, path, phdr->hwaddr + 4); 106615517080SEvgenii Smirnov } 106715517080SEvgenii Smirnov if (!path->query && path_rec_start(dev, path)) { 106815517080SEvgenii Smirnov goto drop_and_unlock; 106915517080SEvgenii Smirnov } 107098aebc55SErez Shitrit 10711e85b806SErez Shitrit if (skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) { 10722b084176SErez Shitrit push_pseudo_header(skb, phdr->hwaddr); 10731da177e4SLinus Torvalds __skb_queue_tail(&path->queue, skb); 107415517080SEvgenii Smirnov goto unlock; 10751da177e4SLinus Torvalds } else { 107698aebc55SErez Shitrit goto drop_and_unlock; 10771da177e4SLinus Torvalds } 10781da177e4SLinus Torvalds } 10791da177e4SLinus Torvalds 108015517080SEvgenii Smirnov spin_unlock_irqrestore(&priv->lock, flags); 108157520751SDasaratharaman Chandramouli ipoib_dbg(priv, "Send unicast ARP to %08x\n", 108257520751SDasaratharaman Chandramouli be32_to_cpu(sa_path_get_dlid(&path->pathrec))); 1083cd565b4bSErez Shitrit path->ah->last_send = rn->send(dev, skb, path->ah->ah, 1084cd565b4bSErez Shitrit IPOIB_QPN(phdr->hwaddr)); 1085721d67cdSRoland Dreier return; 108698aebc55SErez Shitrit 108798aebc55SErez Shitrit drop_and_unlock: 108898aebc55SErez Shitrit ++dev->stats.tx_dropped; 108998aebc55SErez Shitrit dev_kfree_skb_any(skb); 109015517080SEvgenii Smirnov unlock: 109198aebc55SErez Shitrit spin_unlock_irqrestore(&priv->lock, flags); 10921da177e4SLinus Torvalds } 10931da177e4SLinus Torvalds 109447a3968aSLuc Van Oostenryck static netdev_tx_t ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) 10951da177e4SLinus Torvalds { 1096c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 1097cd565b4bSErez Shitrit struct rdma_netdev *rn = netdev_priv(dev); 10981da177e4SLinus Torvalds struct ipoib_neigh *neigh; 1099fc791b63SPaolo Abeni struct ipoib_pseudo_header *phdr; 1100b63b70d8SShlomo Pongratz struct ipoib_header *header; 11011da177e4SLinus Torvalds unsigned long flags; 11021da177e4SLinus Torvalds 1103fc791b63SPaolo Abeni phdr = (struct ipoib_pseudo_header *) skb->data; 1104fc791b63SPaolo Abeni skb_pull(skb, sizeof(*phdr)); 1105b63b70d8SShlomo Pongratz header = (struct ipoib_header *) skb->data; 1106b63b70d8SShlomo Pongratz 1107fc791b63SPaolo Abeni if (unlikely(phdr->hwaddr[4] == 0xff)) { 1108b63b70d8SShlomo Pongratz /* multicast, arrange "if" according to probability */ 1109b63b70d8SShlomo Pongratz if ((header->proto != htons(ETH_P_IP)) && 1110b63b70d8SShlomo Pongratz (header->proto != htons(ETH_P_IPV6)) && 1111b63b70d8SShlomo Pongratz (header->proto != htons(ETH_P_ARP)) && 1112dc850b0eSPatrick McHardy (header->proto != htons(ETH_P_RARP)) && 1113dc850b0eSPatrick McHardy (header->proto != htons(ETH_P_TIPC))) { 1114b63b70d8SShlomo Pongratz /* ethertype not supported by IPoIB */ 111517e6abeeSDavid Miller ++dev->stats.tx_dropped; 111617e6abeeSDavid Miller dev_kfree_skb_any(skb); 1117b63b70d8SShlomo Pongratz return NETDEV_TX_OK; 111817e6abeeSDavid Miller } 1119b63b70d8SShlomo Pongratz /* Add in the P_Key for multicast*/ 1120fc791b63SPaolo Abeni phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff; 1121fc791b63SPaolo Abeni phdr->hwaddr[9] = priv->pkey & 0xff; 1122b63b70d8SShlomo Pongratz 1123fc791b63SPaolo Abeni neigh = ipoib_neigh_get(dev, phdr->hwaddr); 1124b63b70d8SShlomo Pongratz if (likely(neigh)) 1125b63b70d8SShlomo Pongratz goto send_using_neigh; 1126fc791b63SPaolo Abeni ipoib_mcast_send(dev, phdr->hwaddr, skb); 1127b63b70d8SShlomo Pongratz return NETDEV_TX_OK; 11281da177e4SLinus Torvalds } 11291da177e4SLinus Torvalds 1130b63b70d8SShlomo Pongratz /* unicast, arrange "switch" according to probability */ 1131b63b70d8SShlomo Pongratz switch (header->proto) { 1132b63b70d8SShlomo Pongratz case htons(ETH_P_IP): 1133b63b70d8SShlomo Pongratz case htons(ETH_P_IPV6): 1134dc850b0eSPatrick McHardy case htons(ETH_P_TIPC): 1135fc791b63SPaolo Abeni neigh = ipoib_neigh_get(dev, phdr->hwaddr); 1136b63b70d8SShlomo Pongratz if (unlikely(!neigh)) { 113716ba3defSErez Shitrit neigh = neigh_add_path(skb, phdr->hwaddr, dev); 113816ba3defSErez Shitrit if (likely(!neigh)) 1139b63b70d8SShlomo Pongratz return NETDEV_TX_OK; 1140b63b70d8SShlomo Pongratz } 1141b63b70d8SShlomo Pongratz break; 1142b63b70d8SShlomo Pongratz case htons(ETH_P_ARP): 1143b63b70d8SShlomo Pongratz case htons(ETH_P_RARP): 1144b63b70d8SShlomo Pongratz /* for unicast ARP and RARP should always perform path find */ 1145fc791b63SPaolo Abeni unicast_arp_send(skb, dev, phdr); 1146b63b70d8SShlomo Pongratz return NETDEV_TX_OK; 1147b63b70d8SShlomo Pongratz default: 1148b63b70d8SShlomo Pongratz /* ethertype not supported by IPoIB */ 1149b63b70d8SShlomo Pongratz ++dev->stats.tx_dropped; 1150b63b70d8SShlomo Pongratz dev_kfree_skb_any(skb); 1151b63b70d8SShlomo Pongratz return NETDEV_TX_OK; 11528a7f7521SMichael S. Tsirkin } 11538a7f7521SMichael S. Tsirkin 1154b63b70d8SShlomo Pongratz send_using_neigh: 1155b63b70d8SShlomo Pongratz /* note we now hold a ref to neigh */ 1156bafff974SOr Gerlitz if (ipoib_cm_get(neigh)) { 1157bafff974SOr Gerlitz if (ipoib_cm_up(neigh)) { 1158bafff974SOr Gerlitz ipoib_cm_send(dev, skb, ipoib_cm_get(neigh)); 1159b63b70d8SShlomo Pongratz goto unref; 1160bafff974SOr Gerlitz } 1161fa9391dbSDoug Ledford } else if (neigh->ah && neigh->ah->valid) { 1162cd565b4bSErez Shitrit neigh->ah->last_send = rn->send(dev, skb, neigh->ah->ah, 1163cd565b4bSErez Shitrit IPOIB_QPN(phdr->hwaddr)); 1164b63b70d8SShlomo Pongratz goto unref; 1165fa9391dbSDoug Ledford } else if (neigh->ah) { 1166fa9391dbSDoug Ledford neigh_refresh_path(neigh, phdr->hwaddr, dev); 11671da177e4SLinus Torvalds } 11681da177e4SLinus Torvalds 11691da177e4SLinus Torvalds if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) { 11702b084176SErez Shitrit push_pseudo_header(skb, phdr->hwaddr); 1171943c246eSRoland Dreier spin_lock_irqsave(&priv->lock, flags); 11721da177e4SLinus Torvalds __skb_queue_tail(&neigh->queue, skb); 1173943c246eSRoland Dreier spin_unlock_irqrestore(&priv->lock, flags); 11741da177e4SLinus Torvalds } else { 1175de903512SRoland Dreier ++dev->stats.tx_dropped; 11761da177e4SLinus Torvalds dev_kfree_skb_any(skb); 11771da177e4SLinus Torvalds } 11781da177e4SLinus Torvalds 1179b63b70d8SShlomo Pongratz unref: 1180b63b70d8SShlomo Pongratz ipoib_neigh_put(neigh); 11811da177e4SLinus Torvalds 11821da177e4SLinus Torvalds return NETDEV_TX_OK; 11831da177e4SLinus Torvalds } 11841da177e4SLinus Torvalds 11851da177e4SLinus Torvalds static void ipoib_timeout(struct net_device *dev) 11861da177e4SLinus Torvalds { 1187c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 11881da177e4SLinus Torvalds 11894b2d319bSRoland Dreier ipoib_warn(priv, "transmit timeout: latency %d msecs\n", 11904d0e9657SFlorian Westphal jiffies_to_msecs(jiffies - dev_trans_start(dev))); 11914b2d319bSRoland Dreier ipoib_warn(priv, "queue stopped %d, tx_head %u, tx_tail %u\n", 11924b2d319bSRoland Dreier netif_queue_stopped(dev), 11934b2d319bSRoland Dreier priv->tx_head, priv->tx_tail); 11941da177e4SLinus Torvalds /* XXX reset QP, etc. */ 11951da177e4SLinus Torvalds } 11961da177e4SLinus Torvalds 11971da177e4SLinus Torvalds static int ipoib_hard_header(struct sk_buff *skb, 11981da177e4SLinus Torvalds struct net_device *dev, 11991da177e4SLinus Torvalds unsigned short type, 12000578cdadSKamal Heib const void *daddr, 12010578cdadSKamal Heib const void *saddr, 12020578cdadSKamal Heib unsigned int len) 12031da177e4SLinus Torvalds { 12041da177e4SLinus Torvalds struct ipoib_header *header; 12051da177e4SLinus Torvalds 1206b1b63970SKamal Heib header = skb_push(skb, sizeof(*header)); 12071da177e4SLinus Torvalds 12081da177e4SLinus Torvalds header->proto = htons(type); 12091da177e4SLinus Torvalds header->reserved = 0; 12101da177e4SLinus Torvalds 12111da177e4SLinus Torvalds /* 1212b63b70d8SShlomo Pongratz * we don't rely on dst_entry structure, always stuff the 1213fc791b63SPaolo Abeni * destination address into skb hard header so we can figure out where 1214936d7de3SRoland Dreier * to send the packet later. 12151da177e4SLinus Torvalds */ 12162b084176SErez Shitrit push_pseudo_header(skb, daddr); 12171da177e4SLinus Torvalds 1218fc791b63SPaolo Abeni return IPOIB_HARD_LEN; 12191da177e4SLinus Torvalds } 12201da177e4SLinus Torvalds 12211da177e4SLinus Torvalds static void ipoib_set_mcast_list(struct net_device *dev) 12221da177e4SLinus Torvalds { 1223c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 12241da177e4SLinus Torvalds 12257a343d4cSLeonid Arsh if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { 12267a343d4cSLeonid Arsh ipoib_dbg(priv, "IPOIB_FLAG_OPER_UP not set"); 12277a343d4cSLeonid Arsh return; 12287a343d4cSLeonid Arsh } 12297a343d4cSLeonid Arsh 12300b39578bSDoug Ledford queue_work(priv->wq, &priv->restart_task); 12311da177e4SLinus Torvalds } 12321da177e4SLinus Torvalds 12335aa7add8SNicolas Dichtel static int ipoib_get_iflink(const struct net_device *dev) 12345aa7add8SNicolas Dichtel { 1235c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 12365aa7add8SNicolas Dichtel 12372c153959SErez Shitrit /* parent interface */ 12382c153959SErez Shitrit if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) 12392c153959SErez Shitrit return dev->ifindex; 12402c153959SErez Shitrit 12412c153959SErez Shitrit /* child/vlan interface */ 12425aa7add8SNicolas Dichtel return priv->parent->ifindex; 12435aa7add8SNicolas Dichtel } 12445aa7add8SNicolas Dichtel 1245b63b70d8SShlomo Pongratz static u32 ipoib_addr_hash(struct ipoib_neigh_hash *htbl, u8 *daddr) 12461da177e4SLinus Torvalds { 1247b63b70d8SShlomo Pongratz /* 1248b63b70d8SShlomo Pongratz * Use only the address parts that contributes to spreading 1249b63b70d8SShlomo Pongratz * The subnet prefix is not used as one can not connect to 1250b63b70d8SShlomo Pongratz * same remote port (GUID) using the same remote QPN via two 1251b63b70d8SShlomo Pongratz * different subnets. 1252b63b70d8SShlomo Pongratz */ 1253b63b70d8SShlomo Pongratz /* qpn octets[1:4) & port GUID octets[12:20) */ 12549d1ad66eSShlomo Pongratz u32 *d32 = (u32 *) daddr; 1255b63b70d8SShlomo Pongratz u32 hv; 12561da177e4SLinus Torvalds 12579d1ad66eSShlomo Pongratz hv = jhash_3words(d32[3], d32[4], IPOIB_QPN_MASK & d32[0], 0); 1258b63b70d8SShlomo Pongratz return hv & htbl->mask; 12591da177e4SLinus Torvalds } 12601da177e4SLinus Torvalds 1261b63b70d8SShlomo Pongratz struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr) 1262b63b70d8SShlomo Pongratz { 1263c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 1264b63b70d8SShlomo Pongratz struct ipoib_neigh_table *ntbl = &priv->ntbl; 1265b63b70d8SShlomo Pongratz struct ipoib_neigh_hash *htbl; 1266b63b70d8SShlomo Pongratz struct ipoib_neigh *neigh = NULL; 1267b63b70d8SShlomo Pongratz u32 hash_val; 1268b63b70d8SShlomo Pongratz 1269b63b70d8SShlomo Pongratz rcu_read_lock_bh(); 1270b63b70d8SShlomo Pongratz 1271b63b70d8SShlomo Pongratz htbl = rcu_dereference_bh(ntbl->htbl); 1272b63b70d8SShlomo Pongratz 1273b63b70d8SShlomo Pongratz if (!htbl) 1274b63b70d8SShlomo Pongratz goto out_unlock; 1275b63b70d8SShlomo Pongratz 1276b63b70d8SShlomo Pongratz hash_val = ipoib_addr_hash(htbl, daddr); 1277b63b70d8SShlomo Pongratz for (neigh = rcu_dereference_bh(htbl->buckets[hash_val]); 1278b63b70d8SShlomo Pongratz neigh != NULL; 1279b63b70d8SShlomo Pongratz neigh = rcu_dereference_bh(neigh->hnext)) { 1280b63b70d8SShlomo Pongratz if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) { 1281b63b70d8SShlomo Pongratz /* found, take one ref on behalf of the caller */ 1282b63b70d8SShlomo Pongratz if (!atomic_inc_not_zero(&neigh->refcnt)) { 1283b63b70d8SShlomo Pongratz /* deleted */ 1284b63b70d8SShlomo Pongratz neigh = NULL; 1285b63b70d8SShlomo Pongratz goto out_unlock; 1286b63b70d8SShlomo Pongratz } 128761c78eeaSErez Shitrit 128861c78eeaSErez Shitrit if (likely(skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE)) 1289b63b70d8SShlomo Pongratz neigh->alive = jiffies; 1290b63b70d8SShlomo Pongratz goto out_unlock; 1291b63b70d8SShlomo Pongratz } 1292b63b70d8SShlomo Pongratz } 1293b63b70d8SShlomo Pongratz 1294b63b70d8SShlomo Pongratz out_unlock: 1295b63b70d8SShlomo Pongratz rcu_read_unlock_bh(); 1296b63b70d8SShlomo Pongratz return neigh; 1297b63b70d8SShlomo Pongratz } 1298b63b70d8SShlomo Pongratz 1299b63b70d8SShlomo Pongratz static void __ipoib_reap_neigh(struct ipoib_dev_priv *priv) 1300b63b70d8SShlomo Pongratz { 1301b63b70d8SShlomo Pongratz struct ipoib_neigh_table *ntbl = &priv->ntbl; 1302b63b70d8SShlomo Pongratz struct ipoib_neigh_hash *htbl; 1303b63b70d8SShlomo Pongratz unsigned long neigh_obsolete; 1304b63b70d8SShlomo Pongratz unsigned long dt; 1305b63b70d8SShlomo Pongratz unsigned long flags; 1306b63b70d8SShlomo Pongratz int i; 1307bd99b2e0SChristoph Lameter LIST_HEAD(remove_list); 1308b63b70d8SShlomo Pongratz 1309b5120a6eSShlomo Pongratz spin_lock_irqsave(&priv->lock, flags); 1310b63b70d8SShlomo Pongratz 1311b63b70d8SShlomo Pongratz htbl = rcu_dereference_protected(ntbl->htbl, 1312b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock)); 1313b63b70d8SShlomo Pongratz 1314b63b70d8SShlomo Pongratz if (!htbl) 1315b63b70d8SShlomo Pongratz goto out_unlock; 1316b63b70d8SShlomo Pongratz 1317b63b70d8SShlomo Pongratz /* neigh is obsolete if it was idle for two GC periods */ 1318b63b70d8SShlomo Pongratz dt = 2 * arp_tbl.gc_interval; 1319b63b70d8SShlomo Pongratz neigh_obsolete = jiffies - dt; 1320b63b70d8SShlomo Pongratz 1321b63b70d8SShlomo Pongratz for (i = 0; i < htbl->size; i++) { 1322b63b70d8SShlomo Pongratz struct ipoib_neigh *neigh; 1323b63b70d8SShlomo Pongratz struct ipoib_neigh __rcu **np = &htbl->buckets[i]; 1324b63b70d8SShlomo Pongratz 1325b63b70d8SShlomo Pongratz while ((neigh = rcu_dereference_protected(*np, 1326b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock))) != NULL) { 1327b63b70d8SShlomo Pongratz /* was the neigh idle for two GC periods */ 1328b63b70d8SShlomo Pongratz if (time_after(neigh_obsolete, neigh->alive)) { 1329bd99b2e0SChristoph Lameter 1330432c55ffSChristoph Lameter ipoib_check_and_add_mcast_sendonly(priv, neigh->daddr + 4, &remove_list); 1331bd99b2e0SChristoph Lameter 1332b63b70d8SShlomo Pongratz rcu_assign_pointer(*np, 1333b63b70d8SShlomo Pongratz rcu_dereference_protected(neigh->hnext, 1334b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock))); 1335b63b70d8SShlomo Pongratz /* remove from path/mc list */ 1336c586071dSFeras Daoud list_del_init(&neigh->list); 1337b63b70d8SShlomo Pongratz call_rcu(&neigh->rcu, ipoib_neigh_reclaim); 1338b63b70d8SShlomo Pongratz } else { 1339b63b70d8SShlomo Pongratz np = &neigh->hnext; 1340b63b70d8SShlomo Pongratz } 1341b63b70d8SShlomo Pongratz 1342b63b70d8SShlomo Pongratz } 1343b63b70d8SShlomo Pongratz } 1344b63b70d8SShlomo Pongratz 1345b63b70d8SShlomo Pongratz out_unlock: 1346b5120a6eSShlomo Pongratz spin_unlock_irqrestore(&priv->lock, flags); 134750be28deSErez Shitrit ipoib_mcast_remove_list(&remove_list); 1348b63b70d8SShlomo Pongratz } 1349b63b70d8SShlomo Pongratz 1350b63b70d8SShlomo Pongratz static void ipoib_reap_neigh(struct work_struct *work) 1351b63b70d8SShlomo Pongratz { 1352b63b70d8SShlomo Pongratz struct ipoib_dev_priv *priv = 1353b63b70d8SShlomo Pongratz container_of(work, struct ipoib_dev_priv, neigh_reap_task.work); 1354b63b70d8SShlomo Pongratz 1355b63b70d8SShlomo Pongratz __ipoib_reap_neigh(priv); 1356b63b70d8SShlomo Pongratz 13570b39578bSDoug Ledford queue_delayed_work(priv->wq, &priv->neigh_reap_task, 1358b63b70d8SShlomo Pongratz arp_tbl.gc_interval); 1359b63b70d8SShlomo Pongratz } 1360b63b70d8SShlomo Pongratz 1361b63b70d8SShlomo Pongratz 1362b63b70d8SShlomo Pongratz static struct ipoib_neigh *ipoib_neigh_ctor(u8 *daddr, 1363732a2170SMoni Shoua struct net_device *dev) 1364d2e0655eSMichael S. Tsirkin { 1365d2e0655eSMichael S. Tsirkin struct ipoib_neigh *neigh; 1366d2e0655eSMichael S. Tsirkin 1367b1b63970SKamal Heib neigh = kzalloc(sizeof(*neigh), GFP_ATOMIC); 1368d2e0655eSMichael S. Tsirkin if (!neigh) 1369d2e0655eSMichael S. Tsirkin return NULL; 1370d2e0655eSMichael S. Tsirkin 1371732a2170SMoni Shoua neigh->dev = dev; 1372b63b70d8SShlomo Pongratz memcpy(&neigh->daddr, daddr, sizeof(neigh->daddr)); 137382b39913SRoland Dreier skb_queue_head_init(&neigh->queue); 1374b63b70d8SShlomo Pongratz INIT_LIST_HEAD(&neigh->list); 1375839fcabaSMichael S. Tsirkin ipoib_cm_set(neigh, NULL); 1376b63b70d8SShlomo Pongratz /* one ref on behalf of the caller */ 1377b63b70d8SShlomo Pongratz atomic_set(&neigh->refcnt, 1); 1378d2e0655eSMichael S. Tsirkin 1379d2e0655eSMichael S. Tsirkin return neigh; 1380d2e0655eSMichael S. Tsirkin } 1381d2e0655eSMichael S. Tsirkin 1382b63b70d8SShlomo Pongratz struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr, 1383b63b70d8SShlomo Pongratz struct net_device *dev) 1384d2e0655eSMichael S. Tsirkin { 1385c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 1386b63b70d8SShlomo Pongratz struct ipoib_neigh_table *ntbl = &priv->ntbl; 1387b63b70d8SShlomo Pongratz struct ipoib_neigh_hash *htbl; 1388b63b70d8SShlomo Pongratz struct ipoib_neigh *neigh; 1389b63b70d8SShlomo Pongratz u32 hash_val; 1390b63b70d8SShlomo Pongratz 1391b63b70d8SShlomo Pongratz htbl = rcu_dereference_protected(ntbl->htbl, 1392b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock)); 1393b63b70d8SShlomo Pongratz if (!htbl) { 1394b63b70d8SShlomo Pongratz neigh = NULL; 1395b63b70d8SShlomo Pongratz goto out_unlock; 1396b63b70d8SShlomo Pongratz } 1397b63b70d8SShlomo Pongratz 1398b63b70d8SShlomo Pongratz /* need to add a new neigh, but maybe some other thread succeeded? 1399b63b70d8SShlomo Pongratz * recalc hash, maybe hash resize took place so we do a search 1400b63b70d8SShlomo Pongratz */ 1401b63b70d8SShlomo Pongratz hash_val = ipoib_addr_hash(htbl, daddr); 1402b63b70d8SShlomo Pongratz for (neigh = rcu_dereference_protected(htbl->buckets[hash_val], 1403b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock)); 1404b63b70d8SShlomo Pongratz neigh != NULL; 1405b63b70d8SShlomo Pongratz neigh = rcu_dereference_protected(neigh->hnext, 1406b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock))) { 1407b63b70d8SShlomo Pongratz if (memcmp(daddr, neigh->daddr, INFINIBAND_ALEN) == 0) { 1408b63b70d8SShlomo Pongratz /* found, take one ref on behalf of the caller */ 1409b63b70d8SShlomo Pongratz if (!atomic_inc_not_zero(&neigh->refcnt)) { 1410b63b70d8SShlomo Pongratz /* deleted */ 1411b63b70d8SShlomo Pongratz neigh = NULL; 1412b63b70d8SShlomo Pongratz break; 1413b63b70d8SShlomo Pongratz } 1414b63b70d8SShlomo Pongratz neigh->alive = jiffies; 1415b63b70d8SShlomo Pongratz goto out_unlock; 1416b63b70d8SShlomo Pongratz } 1417b63b70d8SShlomo Pongratz } 1418b63b70d8SShlomo Pongratz 1419b63b70d8SShlomo Pongratz neigh = ipoib_neigh_ctor(daddr, dev); 1420b63b70d8SShlomo Pongratz if (!neigh) 1421b63b70d8SShlomo Pongratz goto out_unlock; 1422b63b70d8SShlomo Pongratz 1423b63b70d8SShlomo Pongratz /* one ref on behalf of the hash table */ 1424b63b70d8SShlomo Pongratz atomic_inc(&neigh->refcnt); 1425b63b70d8SShlomo Pongratz neigh->alive = jiffies; 1426b63b70d8SShlomo Pongratz /* put in hash */ 1427b63b70d8SShlomo Pongratz rcu_assign_pointer(neigh->hnext, 1428b63b70d8SShlomo Pongratz rcu_dereference_protected(htbl->buckets[hash_val], 1429b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock))); 1430b63b70d8SShlomo Pongratz rcu_assign_pointer(htbl->buckets[hash_val], neigh); 1431b63b70d8SShlomo Pongratz atomic_inc(&ntbl->entries); 1432b63b70d8SShlomo Pongratz 1433b63b70d8SShlomo Pongratz out_unlock: 1434b63b70d8SShlomo Pongratz 1435b63b70d8SShlomo Pongratz return neigh; 1436b63b70d8SShlomo Pongratz } 1437b63b70d8SShlomo Pongratz 1438b63b70d8SShlomo Pongratz void ipoib_neigh_dtor(struct ipoib_neigh *neigh) 1439b63b70d8SShlomo Pongratz { 1440b63b70d8SShlomo Pongratz /* neigh reference count was dropprd to zero */ 1441b63b70d8SShlomo Pongratz struct net_device *dev = neigh->dev; 1442c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 14432745b5b7SMichael S. Tsirkin struct sk_buff *skb; 1444b63b70d8SShlomo Pongratz if (neigh->ah) 1445b63b70d8SShlomo Pongratz ipoib_put_ah(neigh->ah); 14462745b5b7SMichael S. Tsirkin while ((skb = __skb_dequeue(&neigh->queue))) { 1447de903512SRoland Dreier ++dev->stats.tx_dropped; 14482745b5b7SMichael S. Tsirkin dev_kfree_skb_any(skb); 14492745b5b7SMichael S. Tsirkin } 1450839fcabaSMichael S. Tsirkin if (ipoib_cm_get(neigh)) 1451839fcabaSMichael S. Tsirkin ipoib_cm_destroy_tx(ipoib_cm_get(neigh)); 1452c1048affSErez Shitrit ipoib_dbg(ipoib_priv(dev), 1453b63b70d8SShlomo Pongratz "neigh free for %06x %pI6\n", 1454b63b70d8SShlomo Pongratz IPOIB_QPN(neigh->daddr), 1455b63b70d8SShlomo Pongratz neigh->daddr + 4); 1456d2e0655eSMichael S. Tsirkin kfree(neigh); 1457b63b70d8SShlomo Pongratz if (atomic_dec_and_test(&priv->ntbl.entries)) { 1458b63b70d8SShlomo Pongratz if (test_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags)) 1459b63b70d8SShlomo Pongratz complete(&priv->ntbl.flushed); 1460b63b70d8SShlomo Pongratz } 1461d2e0655eSMichael S. Tsirkin } 1462d2e0655eSMichael S. Tsirkin 1463b63b70d8SShlomo Pongratz static void ipoib_neigh_reclaim(struct rcu_head *rp) 14641da177e4SLinus Torvalds { 1465b63b70d8SShlomo Pongratz /* Called as a result of removal from hash table */ 1466b63b70d8SShlomo Pongratz struct ipoib_neigh *neigh = container_of(rp, struct ipoib_neigh, rcu); 1467b63b70d8SShlomo Pongratz /* note TX context may hold another ref */ 1468b63b70d8SShlomo Pongratz ipoib_neigh_put(neigh); 1469b63b70d8SShlomo Pongratz } 1470b63b70d8SShlomo Pongratz 1471b63b70d8SShlomo Pongratz void ipoib_neigh_free(struct ipoib_neigh *neigh) 1472b63b70d8SShlomo Pongratz { 1473b63b70d8SShlomo Pongratz struct net_device *dev = neigh->dev; 1474c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 1475b63b70d8SShlomo Pongratz struct ipoib_neigh_table *ntbl = &priv->ntbl; 1476b63b70d8SShlomo Pongratz struct ipoib_neigh_hash *htbl; 1477b63b70d8SShlomo Pongratz struct ipoib_neigh __rcu **np; 1478b63b70d8SShlomo Pongratz struct ipoib_neigh *n; 1479b63b70d8SShlomo Pongratz u32 hash_val; 1480b63b70d8SShlomo Pongratz 1481b63b70d8SShlomo Pongratz htbl = rcu_dereference_protected(ntbl->htbl, 1482b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock)); 1483b63b70d8SShlomo Pongratz if (!htbl) 1484b5120a6eSShlomo Pongratz return; 1485b63b70d8SShlomo Pongratz 1486b63b70d8SShlomo Pongratz hash_val = ipoib_addr_hash(htbl, neigh->daddr); 1487b63b70d8SShlomo Pongratz np = &htbl->buckets[hash_val]; 1488b63b70d8SShlomo Pongratz for (n = rcu_dereference_protected(*np, 1489b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock)); 1490b63b70d8SShlomo Pongratz n != NULL; 14916c723a68SShlomo Pongratz n = rcu_dereference_protected(*np, 1492b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock))) { 1493b63b70d8SShlomo Pongratz if (n == neigh) { 1494b63b70d8SShlomo Pongratz /* found */ 1495b63b70d8SShlomo Pongratz rcu_assign_pointer(*np, 1496b63b70d8SShlomo Pongratz rcu_dereference_protected(neigh->hnext, 1497b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock))); 149849b8e744SJim Foraker /* remove from parent list */ 1499c586071dSFeras Daoud list_del_init(&neigh->list); 1500b63b70d8SShlomo Pongratz call_rcu(&neigh->rcu, ipoib_neigh_reclaim); 1501b5120a6eSShlomo Pongratz return; 1502b63b70d8SShlomo Pongratz } else { 1503b63b70d8SShlomo Pongratz np = &n->hnext; 1504b63b70d8SShlomo Pongratz } 1505b63b70d8SShlomo Pongratz } 1506b63b70d8SShlomo Pongratz } 1507b63b70d8SShlomo Pongratz 1508b63b70d8SShlomo Pongratz static int ipoib_neigh_hash_init(struct ipoib_dev_priv *priv) 1509b63b70d8SShlomo Pongratz { 1510b63b70d8SShlomo Pongratz struct ipoib_neigh_table *ntbl = &priv->ntbl; 1511b63b70d8SShlomo Pongratz struct ipoib_neigh_hash *htbl; 151252374967SBart Van Assche struct ipoib_neigh __rcu **buckets; 1513b63b70d8SShlomo Pongratz u32 size; 1514b63b70d8SShlomo Pongratz 1515b63b70d8SShlomo Pongratz clear_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags); 1516b63b70d8SShlomo Pongratz ntbl->htbl = NULL; 1517b63b70d8SShlomo Pongratz htbl = kzalloc(sizeof(*htbl), GFP_KERNEL); 1518b63b70d8SShlomo Pongratz if (!htbl) 1519b63b70d8SShlomo Pongratz return -ENOMEM; 1520b63b70d8SShlomo Pongratz size = roundup_pow_of_two(arp_tbl.gc_thresh3); 1521259e1914SJan Dakinevich buckets = kvcalloc(size, sizeof(*buckets), GFP_KERNEL); 1522b63b70d8SShlomo Pongratz if (!buckets) { 1523b63b70d8SShlomo Pongratz kfree(htbl); 1524b63b70d8SShlomo Pongratz return -ENOMEM; 1525b63b70d8SShlomo Pongratz } 1526b63b70d8SShlomo Pongratz htbl->size = size; 1527b63b70d8SShlomo Pongratz htbl->mask = (size - 1); 1528b63b70d8SShlomo Pongratz htbl->buckets = buckets; 152952374967SBart Van Assche RCU_INIT_POINTER(ntbl->htbl, htbl); 153066172c09SShlomo Pongratz htbl->ntbl = ntbl; 1531b63b70d8SShlomo Pongratz atomic_set(&ntbl->entries, 0); 1532b63b70d8SShlomo Pongratz 1533b63b70d8SShlomo Pongratz /* start garbage collection */ 15340b39578bSDoug Ledford queue_delayed_work(priv->wq, &priv->neigh_reap_task, 1535b63b70d8SShlomo Pongratz arp_tbl.gc_interval); 15361da177e4SLinus Torvalds 15371da177e4SLinus Torvalds return 0; 15381da177e4SLinus Torvalds } 15391da177e4SLinus Torvalds 1540b63b70d8SShlomo Pongratz static void neigh_hash_free_rcu(struct rcu_head *head) 1541b63b70d8SShlomo Pongratz { 1542b63b70d8SShlomo Pongratz struct ipoib_neigh_hash *htbl = container_of(head, 1543b63b70d8SShlomo Pongratz struct ipoib_neigh_hash, 1544b63b70d8SShlomo Pongratz rcu); 1545b63b70d8SShlomo Pongratz struct ipoib_neigh __rcu **buckets = htbl->buckets; 154666172c09SShlomo Pongratz struct ipoib_neigh_table *ntbl = htbl->ntbl; 1547b63b70d8SShlomo Pongratz 1548259e1914SJan Dakinevich kvfree(buckets); 1549b63b70d8SShlomo Pongratz kfree(htbl); 155066172c09SShlomo Pongratz complete(&ntbl->deleted); 1551b63b70d8SShlomo Pongratz } 1552b63b70d8SShlomo Pongratz 1553b63b70d8SShlomo Pongratz void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid) 1554b63b70d8SShlomo Pongratz { 1555c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 1556b63b70d8SShlomo Pongratz struct ipoib_neigh_table *ntbl = &priv->ntbl; 1557b63b70d8SShlomo Pongratz struct ipoib_neigh_hash *htbl; 1558b63b70d8SShlomo Pongratz unsigned long flags; 1559b63b70d8SShlomo Pongratz int i; 1560b63b70d8SShlomo Pongratz 1561b63b70d8SShlomo Pongratz /* remove all neigh connected to a given path or mcast */ 1562b5120a6eSShlomo Pongratz spin_lock_irqsave(&priv->lock, flags); 1563b63b70d8SShlomo Pongratz 1564b63b70d8SShlomo Pongratz htbl = rcu_dereference_protected(ntbl->htbl, 1565b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock)); 1566b63b70d8SShlomo Pongratz 1567b63b70d8SShlomo Pongratz if (!htbl) 1568b63b70d8SShlomo Pongratz goto out_unlock; 1569b63b70d8SShlomo Pongratz 1570b63b70d8SShlomo Pongratz for (i = 0; i < htbl->size; i++) { 1571b63b70d8SShlomo Pongratz struct ipoib_neigh *neigh; 1572b63b70d8SShlomo Pongratz struct ipoib_neigh __rcu **np = &htbl->buckets[i]; 1573b63b70d8SShlomo Pongratz 1574b63b70d8SShlomo Pongratz while ((neigh = rcu_dereference_protected(*np, 1575b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock))) != NULL) { 1576b63b70d8SShlomo Pongratz /* delete neighs belong to this parent */ 1577b63b70d8SShlomo Pongratz if (!memcmp(gid, neigh->daddr + 4, sizeof (union ib_gid))) { 1578b63b70d8SShlomo Pongratz rcu_assign_pointer(*np, 1579b63b70d8SShlomo Pongratz rcu_dereference_protected(neigh->hnext, 1580b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock))); 1581b63b70d8SShlomo Pongratz /* remove from parent list */ 1582c586071dSFeras Daoud list_del_init(&neigh->list); 1583b63b70d8SShlomo Pongratz call_rcu(&neigh->rcu, ipoib_neigh_reclaim); 1584b63b70d8SShlomo Pongratz } else { 1585b63b70d8SShlomo Pongratz np = &neigh->hnext; 1586b63b70d8SShlomo Pongratz } 1587b63b70d8SShlomo Pongratz 1588b63b70d8SShlomo Pongratz } 1589b63b70d8SShlomo Pongratz } 1590b63b70d8SShlomo Pongratz out_unlock: 1591b5120a6eSShlomo Pongratz spin_unlock_irqrestore(&priv->lock, flags); 1592b63b70d8SShlomo Pongratz } 1593b63b70d8SShlomo Pongratz 1594b63b70d8SShlomo Pongratz static void ipoib_flush_neighs(struct ipoib_dev_priv *priv) 1595b63b70d8SShlomo Pongratz { 1596b63b70d8SShlomo Pongratz struct ipoib_neigh_table *ntbl = &priv->ntbl; 1597b63b70d8SShlomo Pongratz struct ipoib_neigh_hash *htbl; 1598b63b70d8SShlomo Pongratz unsigned long flags; 159966172c09SShlomo Pongratz int i, wait_flushed = 0; 1600b63b70d8SShlomo Pongratz 160166172c09SShlomo Pongratz init_completion(&priv->ntbl.flushed); 1602d2e46fccSFeras Daoud set_bit(IPOIB_NEIGH_TBL_FLUSH, &priv->flags); 1603b63b70d8SShlomo Pongratz 1604b5120a6eSShlomo Pongratz spin_lock_irqsave(&priv->lock, flags); 1605b63b70d8SShlomo Pongratz 1606b63b70d8SShlomo Pongratz htbl = rcu_dereference_protected(ntbl->htbl, 1607b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock)); 1608b63b70d8SShlomo Pongratz if (!htbl) 1609b63b70d8SShlomo Pongratz goto out_unlock; 1610b63b70d8SShlomo Pongratz 161166172c09SShlomo Pongratz wait_flushed = atomic_read(&priv->ntbl.entries); 161266172c09SShlomo Pongratz if (!wait_flushed) 161366172c09SShlomo Pongratz goto free_htbl; 161466172c09SShlomo Pongratz 1615b63b70d8SShlomo Pongratz for (i = 0; i < htbl->size; i++) { 1616b63b70d8SShlomo Pongratz struct ipoib_neigh *neigh; 1617b63b70d8SShlomo Pongratz struct ipoib_neigh __rcu **np = &htbl->buckets[i]; 1618b63b70d8SShlomo Pongratz 1619b63b70d8SShlomo Pongratz while ((neigh = rcu_dereference_protected(*np, 1620b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock))) != NULL) { 1621b63b70d8SShlomo Pongratz rcu_assign_pointer(*np, 1622b63b70d8SShlomo Pongratz rcu_dereference_protected(neigh->hnext, 1623b5120a6eSShlomo Pongratz lockdep_is_held(&priv->lock))); 1624b63b70d8SShlomo Pongratz /* remove from path/mc list */ 1625c586071dSFeras Daoud list_del_init(&neigh->list); 1626b63b70d8SShlomo Pongratz call_rcu(&neigh->rcu, ipoib_neigh_reclaim); 1627b63b70d8SShlomo Pongratz } 1628b63b70d8SShlomo Pongratz } 1629b63b70d8SShlomo Pongratz 163066172c09SShlomo Pongratz free_htbl: 1631b63b70d8SShlomo Pongratz rcu_assign_pointer(ntbl->htbl, NULL); 1632b63b70d8SShlomo Pongratz call_rcu(&htbl->rcu, neigh_hash_free_rcu); 1633b63b70d8SShlomo Pongratz 1634b63b70d8SShlomo Pongratz out_unlock: 1635b5120a6eSShlomo Pongratz spin_unlock_irqrestore(&priv->lock, flags); 163666172c09SShlomo Pongratz if (wait_flushed) 163766172c09SShlomo Pongratz wait_for_completion(&priv->ntbl.flushed); 1638b63b70d8SShlomo Pongratz } 1639b63b70d8SShlomo Pongratz 1640b63b70d8SShlomo Pongratz static void ipoib_neigh_hash_uninit(struct net_device *dev) 1641b63b70d8SShlomo Pongratz { 1642c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 1643b63b70d8SShlomo Pongratz 1644b63b70d8SShlomo Pongratz ipoib_dbg(priv, "ipoib_neigh_hash_uninit\n"); 164566172c09SShlomo Pongratz init_completion(&priv->ntbl.deleted); 1646b63b70d8SShlomo Pongratz 1647cda8daf1SErez Shitrit cancel_delayed_work_sync(&priv->neigh_reap_task); 1648b63b70d8SShlomo Pongratz 1649b63b70d8SShlomo Pongratz ipoib_flush_neighs(priv); 165066172c09SShlomo Pongratz 165166172c09SShlomo Pongratz wait_for_completion(&priv->ntbl.deleted); 1652b63b70d8SShlomo Pongratz } 1653b63b70d8SShlomo Pongratz 16548966e28dSErez Shitrit static void ipoib_napi_add(struct net_device *dev) 16558966e28dSErez Shitrit { 16568966e28dSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 16578966e28dSErez Shitrit 16588966e28dSErez Shitrit netif_napi_add(dev, &priv->recv_napi, ipoib_rx_poll, IPOIB_NUM_WC); 16598966e28dSErez Shitrit netif_napi_add(dev, &priv->send_napi, ipoib_tx_poll, MAX_SEND_CQE); 16608966e28dSErez Shitrit } 16618966e28dSErez Shitrit 16628966e28dSErez Shitrit static void ipoib_napi_del(struct net_device *dev) 16638966e28dSErez Shitrit { 16648966e28dSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 16658966e28dSErez Shitrit 16668966e28dSErez Shitrit netif_napi_del(&priv->recv_napi); 16678966e28dSErez Shitrit netif_napi_del(&priv->send_napi); 16688966e28dSErez Shitrit } 16698966e28dSErez Shitrit 16700a1a9726SLeon Romanovsky static void ipoib_dev_uninit_default(struct net_device *dev) 1671515ed4f3SErez Shitrit { 1672c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 1673b63b70d8SShlomo Pongratz 1674515ed4f3SErez Shitrit ipoib_transport_dev_cleanup(dev); 1675515ed4f3SErez Shitrit 16768966e28dSErez Shitrit ipoib_napi_del(dev); 1677b53d4566SAlex Vesker 1678515ed4f3SErez Shitrit ipoib_cm_dev_cleanup(dev); 1679515ed4f3SErez Shitrit 1680515ed4f3SErez Shitrit kfree(priv->rx_ring); 1681515ed4f3SErez Shitrit vfree(priv->tx_ring); 1682515ed4f3SErez Shitrit 1683515ed4f3SErez Shitrit priv->rx_ring = NULL; 1684515ed4f3SErez Shitrit priv->tx_ring = NULL; 1685515ed4f3SErez Shitrit } 1686515ed4f3SErez Shitrit 1687cd565b4bSErez Shitrit static int ipoib_dev_init_default(struct net_device *dev) 16881da177e4SLinus Torvalds { 1689c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 16901da177e4SLinus Torvalds 16918966e28dSErez Shitrit ipoib_napi_add(dev); 1692cd565b4bSErez Shitrit 16931da177e4SLinus Torvalds /* Allocate RX/TX "rings" to hold queued skbs */ 16946396bb22SKees Cook priv->rx_ring = kcalloc(ipoib_recvq_size, 16956396bb22SKees Cook sizeof(*priv->rx_ring), 16961da177e4SLinus Torvalds GFP_KERNEL); 169774226649SLeon Romanovsky if (!priv->rx_ring) 1698be7aa663SDoug Ledford goto out; 16991da177e4SLinus Torvalds 1700fad953ceSKees Cook priv->tx_ring = vzalloc(array_size(ipoib_sendq_size, 1701fad953ceSKees Cook sizeof(*priv->tx_ring))); 17021da177e4SLinus Torvalds if (!priv->tx_ring) { 1703c55359a2SYuval Shaia pr_warn("%s: failed to allocate TX ring (%d entries)\n", 1704cd565b4bSErez Shitrit priv->ca->name, ipoib_sendq_size); 17051da177e4SLinus Torvalds goto out_rx_ring_cleanup; 17061da177e4SLinus Torvalds } 17071da177e4SLinus Torvalds 17081b524963SMichael S. Tsirkin /* priv->tx_head, tx_tail & tx_outstanding are already 0 */ 17091da177e4SLinus Torvalds 1710cd565b4bSErez Shitrit if (ipoib_transport_dev_init(dev, priv->ca)) { 1711cd565b4bSErez Shitrit pr_warn("%s: ipoib_transport_dev_init failed\n", 1712cd565b4bSErez Shitrit priv->ca->name); 17131da177e4SLinus Torvalds goto out_tx_ring_cleanup; 1714515ed4f3SErez Shitrit } 17151da177e4SLinus Torvalds 1716cd565b4bSErez Shitrit /* after qp created set dev address */ 1717cd565b4bSErez Shitrit priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff; 1718cd565b4bSErez Shitrit priv->dev->dev_addr[2] = (priv->qp->qp_num >> 8) & 0xff; 1719cd565b4bSErez Shitrit priv->dev->dev_addr[3] = (priv->qp->qp_num) & 0xff; 1720cd565b4bSErez Shitrit 17211da177e4SLinus Torvalds return 0; 17221da177e4SLinus Torvalds 17231da177e4SLinus Torvalds out_tx_ring_cleanup: 172410313cbbSRoland Dreier vfree(priv->tx_ring); 17251da177e4SLinus Torvalds 17261da177e4SLinus Torvalds out_rx_ring_cleanup: 17271da177e4SLinus Torvalds kfree(priv->rx_ring); 17281da177e4SLinus Torvalds 17291da177e4SLinus Torvalds out: 17308966e28dSErez Shitrit ipoib_napi_del(dev); 17311da177e4SLinus Torvalds return -ENOMEM; 17321da177e4SLinus Torvalds } 17331da177e4SLinus Torvalds 173431a82362SFeras Daoud static int ipoib_ioctl(struct net_device *dev, struct ifreq *ifr, 173531a82362SFeras Daoud int cmd) 173631a82362SFeras Daoud { 173731a82362SFeras Daoud struct ipoib_dev_priv *priv = ipoib_priv(dev); 173831a82362SFeras Daoud 173931a82362SFeras Daoud if (!priv->rn_ops->ndo_do_ioctl) 174031a82362SFeras Daoud return -EOPNOTSUPP; 174131a82362SFeras Daoud 174231a82362SFeras Daoud return priv->rn_ops->ndo_do_ioctl(dev, ifr, cmd); 174331a82362SFeras Daoud } 174431a82362SFeras Daoud 1745eaeb3984SJason Gunthorpe static int ipoib_dev_init(struct net_device *dev) 1746515ed4f3SErez Shitrit { 1747c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 1748515ed4f3SErez Shitrit int ret = -ENOMEM; 1749515ed4f3SErez Shitrit 1750515ed4f3SErez Shitrit priv->qp = NULL; 1751515ed4f3SErez Shitrit 1752515ed4f3SErez Shitrit /* 1753515ed4f3SErez Shitrit * the various IPoIB tasks assume they will never race against 1754515ed4f3SErez Shitrit * themselves, so always use a single thread workqueue 1755515ed4f3SErez Shitrit */ 1756515ed4f3SErez Shitrit priv->wq = alloc_ordered_workqueue("ipoib_wq", WQ_MEM_RECLAIM); 1757515ed4f3SErez Shitrit if (!priv->wq) { 1758515ed4f3SErez Shitrit pr_warn("%s: failed to allocate device WQ\n", dev->name); 1759515ed4f3SErez Shitrit goto out; 1760515ed4f3SErez Shitrit } 1761515ed4f3SErez Shitrit 1762515ed4f3SErez Shitrit /* create pd, which used both for control and datapath*/ 1763515ed4f3SErez Shitrit priv->pd = ib_alloc_pd(priv->ca, 0); 1764515ed4f3SErez Shitrit if (IS_ERR(priv->pd)) { 1765eaeb3984SJason Gunthorpe pr_warn("%s: failed to allocate PD\n", priv->ca->name); 1766515ed4f3SErez Shitrit goto clean_wq; 1767515ed4f3SErez Shitrit } 1768515ed4f3SErez Shitrit 1769cd565b4bSErez Shitrit ret = priv->rn_ops->ndo_init(dev); 1770515ed4f3SErez Shitrit if (ret) { 1771515ed4f3SErez Shitrit pr_warn("%s failed to init HW resource\n", dev->name); 1772515ed4f3SErez Shitrit goto out_free_pd; 1773515ed4f3SErez Shitrit } 1774515ed4f3SErez Shitrit 177599a7e2bfSWei Yongjun ret = ipoib_neigh_hash_init(priv); 177699a7e2bfSWei Yongjun if (ret) { 1777515ed4f3SErez Shitrit pr_warn("%s failed to init neigh hash\n", dev->name); 1778515ed4f3SErez Shitrit goto out_dev_uninit; 1779515ed4f3SErez Shitrit } 1780515ed4f3SErez Shitrit 1781515ed4f3SErez Shitrit if (dev->flags & IFF_UP) { 1782515ed4f3SErez Shitrit if (ipoib_ib_dev_open(dev)) { 1783515ed4f3SErez Shitrit pr_warn("%s failed to open device\n", dev->name); 1784515ed4f3SErez Shitrit ret = -ENODEV; 1785cda8daf1SErez Shitrit goto out_hash_uninit; 1786515ed4f3SErez Shitrit } 1787515ed4f3SErez Shitrit } 1788515ed4f3SErez Shitrit 1789515ed4f3SErez Shitrit return 0; 1790515ed4f3SErez Shitrit 1791cda8daf1SErez Shitrit out_hash_uninit: 1792cda8daf1SErez Shitrit ipoib_neigh_hash_uninit(dev); 1793cda8daf1SErez Shitrit 1794515ed4f3SErez Shitrit out_dev_uninit: 1795515ed4f3SErez Shitrit ipoib_ib_dev_cleanup(dev); 1796515ed4f3SErez Shitrit 1797515ed4f3SErez Shitrit out_free_pd: 1798515ed4f3SErez Shitrit if (priv->pd) { 1799515ed4f3SErez Shitrit ib_dealloc_pd(priv->pd); 1800515ed4f3SErez Shitrit priv->pd = NULL; 1801515ed4f3SErez Shitrit } 1802515ed4f3SErez Shitrit 1803515ed4f3SErez Shitrit clean_wq: 1804515ed4f3SErez Shitrit if (priv->wq) { 1805515ed4f3SErez Shitrit destroy_workqueue(priv->wq); 1806515ed4f3SErez Shitrit priv->wq = NULL; 1807515ed4f3SErez Shitrit } 1808515ed4f3SErez Shitrit 1809515ed4f3SErez Shitrit out: 1810515ed4f3SErez Shitrit return ret; 1811515ed4f3SErez Shitrit } 1812515ed4f3SErez Shitrit 18137cbee87cSJason Gunthorpe /* 18147cbee87cSJason Gunthorpe * This must be called before doing an unregister_netdev on a parent device to 18157cbee87cSJason Gunthorpe * shutdown the IB event handler. 18167cbee87cSJason Gunthorpe */ 18177cbee87cSJason Gunthorpe static void ipoib_parent_unregister_pre(struct net_device *ndev) 18187cbee87cSJason Gunthorpe { 18197cbee87cSJason Gunthorpe struct ipoib_dev_priv *priv = ipoib_priv(ndev); 18207cbee87cSJason Gunthorpe 18217cbee87cSJason Gunthorpe /* 18227cbee87cSJason Gunthorpe * ipoib_set_mac checks netif_running before pushing work, clearing 18237cbee87cSJason Gunthorpe * running ensures the it will not add more work. 18247cbee87cSJason Gunthorpe */ 18257cbee87cSJason Gunthorpe rtnl_lock(); 1826567c5e13SPetr Machata dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP, NULL); 18277cbee87cSJason Gunthorpe rtnl_unlock(); 18287cbee87cSJason Gunthorpe 18297cbee87cSJason Gunthorpe /* ipoib_event() cannot be running once this returns */ 18307cbee87cSJason Gunthorpe ib_unregister_event_handler(&priv->event_handler); 18317cbee87cSJason Gunthorpe 18327cbee87cSJason Gunthorpe /* 18337cbee87cSJason Gunthorpe * Work on the queue grabs the rtnl lock, so this cannot be done while 18347cbee87cSJason Gunthorpe * also holding it. 18357cbee87cSJason Gunthorpe */ 18367cbee87cSJason Gunthorpe flush_workqueue(ipoib_workqueue); 18377cbee87cSJason Gunthorpe } 18387cbee87cSJason Gunthorpe 1839eaeb3984SJason Gunthorpe static void ipoib_set_dev_features(struct ipoib_dev_priv *priv) 1840eaeb3984SJason Gunthorpe { 1841eaeb3984SJason Gunthorpe priv->hca_caps = priv->ca->attrs.device_cap_flags; 1842eaeb3984SJason Gunthorpe 1843eaeb3984SJason Gunthorpe if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) { 1844eaeb3984SJason Gunthorpe priv->dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1845eaeb3984SJason Gunthorpe 1846eaeb3984SJason Gunthorpe if (priv->hca_caps & IB_DEVICE_UD_TSO) 1847eaeb3984SJason Gunthorpe priv->dev->hw_features |= NETIF_F_TSO; 1848eaeb3984SJason Gunthorpe 1849eaeb3984SJason Gunthorpe priv->dev->features |= priv->dev->hw_features; 1850eaeb3984SJason Gunthorpe } 1851eaeb3984SJason Gunthorpe } 1852eaeb3984SJason Gunthorpe 1853eaeb3984SJason Gunthorpe static int ipoib_parent_init(struct net_device *ndev) 1854eaeb3984SJason Gunthorpe { 1855eaeb3984SJason Gunthorpe struct ipoib_dev_priv *priv = ipoib_priv(ndev); 1856eaeb3984SJason Gunthorpe struct ib_port_attr attr; 1857eaeb3984SJason Gunthorpe int result; 1858eaeb3984SJason Gunthorpe 1859eaeb3984SJason Gunthorpe result = ib_query_port(priv->ca, priv->port, &attr); 1860eaeb3984SJason Gunthorpe if (result) { 1861eaeb3984SJason Gunthorpe pr_warn("%s: ib_query_port %d failed\n", priv->ca->name, 1862eaeb3984SJason Gunthorpe priv->port); 1863eaeb3984SJason Gunthorpe return result; 1864eaeb3984SJason Gunthorpe } 1865eaeb3984SJason Gunthorpe priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu); 1866eaeb3984SJason Gunthorpe 1867eaeb3984SJason Gunthorpe result = ib_query_pkey(priv->ca, priv->port, 0, &priv->pkey); 1868eaeb3984SJason Gunthorpe if (result) { 1869eaeb3984SJason Gunthorpe pr_warn("%s: ib_query_pkey port %d failed (ret = %d)\n", 1870eaeb3984SJason Gunthorpe priv->ca->name, priv->port, result); 1871eaeb3984SJason Gunthorpe return result; 1872eaeb3984SJason Gunthorpe } 1873eaeb3984SJason Gunthorpe 1874eaeb3984SJason Gunthorpe result = rdma_query_gid(priv->ca, priv->port, 0, &priv->local_gid); 1875eaeb3984SJason Gunthorpe if (result) { 1876eaeb3984SJason Gunthorpe pr_warn("%s: rdma_query_gid port %d failed (ret = %d)\n", 1877eaeb3984SJason Gunthorpe priv->ca->name, priv->port, result); 1878eaeb3984SJason Gunthorpe return result; 1879eaeb3984SJason Gunthorpe } 1880eaeb3984SJason Gunthorpe memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, 1881eaeb3984SJason Gunthorpe sizeof(union ib_gid)); 1882eaeb3984SJason Gunthorpe 1883eaeb3984SJason Gunthorpe SET_NETDEV_DEV(priv->dev, priv->ca->dev.parent); 18849b8b2a32SArseny Maslennikov priv->dev->dev_port = priv->port - 1; 18859b8b2a32SArseny Maslennikov /* Let's set this one too for backwards compatibility. */ 1886eaeb3984SJason Gunthorpe priv->dev->dev_id = priv->port - 1; 1887eaeb3984SJason Gunthorpe 1888eaeb3984SJason Gunthorpe return 0; 1889eaeb3984SJason Gunthorpe } 1890eaeb3984SJason Gunthorpe 1891eaeb3984SJason Gunthorpe static void ipoib_child_init(struct net_device *ndev) 1892eaeb3984SJason Gunthorpe { 1893eaeb3984SJason Gunthorpe struct ipoib_dev_priv *priv = ipoib_priv(ndev); 1894eaeb3984SJason Gunthorpe struct ipoib_dev_priv *ppriv = ipoib_priv(priv->parent); 1895eaeb3984SJason Gunthorpe 189613476d35SJason Gunthorpe dev_hold(priv->parent); 189713476d35SJason Gunthorpe 189813476d35SJason Gunthorpe down_write(&ppriv->vlan_rwsem); 189913476d35SJason Gunthorpe list_add_tail(&priv->list, &ppriv->child_intfs); 190013476d35SJason Gunthorpe up_write(&ppriv->vlan_rwsem); 190113476d35SJason Gunthorpe 1902eaeb3984SJason Gunthorpe priv->max_ib_mtu = ppriv->max_ib_mtu; 1903eaeb3984SJason Gunthorpe set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags); 1904eaeb3984SJason Gunthorpe memcpy(priv->dev->dev_addr, ppriv->dev->dev_addr, INFINIBAND_ALEN); 1905eaeb3984SJason Gunthorpe memcpy(&priv->local_gid, &ppriv->local_gid, sizeof(priv->local_gid)); 1906eaeb3984SJason Gunthorpe } 1907eaeb3984SJason Gunthorpe 1908eaeb3984SJason Gunthorpe static int ipoib_ndo_init(struct net_device *ndev) 1909eaeb3984SJason Gunthorpe { 1910eaeb3984SJason Gunthorpe struct ipoib_dev_priv *priv = ipoib_priv(ndev); 1911eaeb3984SJason Gunthorpe int rc; 1912eaeb3984SJason Gunthorpe 1913eaeb3984SJason Gunthorpe if (priv->parent) { 1914eaeb3984SJason Gunthorpe ipoib_child_init(ndev); 1915eaeb3984SJason Gunthorpe } else { 1916eaeb3984SJason Gunthorpe rc = ipoib_parent_init(ndev); 1917eaeb3984SJason Gunthorpe if (rc) 1918eaeb3984SJason Gunthorpe return rc; 1919eaeb3984SJason Gunthorpe } 1920eaeb3984SJason Gunthorpe 1921eaeb3984SJason Gunthorpe /* MTU will be reset when mcast join happens */ 1922eaeb3984SJason Gunthorpe ndev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu); 1923eaeb3984SJason Gunthorpe priv->mcast_mtu = priv->admin_mtu = ndev->mtu; 1924eaeb3984SJason Gunthorpe ndev->max_mtu = IPOIB_CM_MTU; 1925eaeb3984SJason Gunthorpe 1926eaeb3984SJason Gunthorpe ndev->neigh_priv_len = sizeof(struct ipoib_neigh); 1927eaeb3984SJason Gunthorpe 1928eaeb3984SJason Gunthorpe /* 1929eaeb3984SJason Gunthorpe * Set the full membership bit, so that we join the right 1930eaeb3984SJason Gunthorpe * broadcast group, etc. 1931eaeb3984SJason Gunthorpe */ 1932eaeb3984SJason Gunthorpe priv->pkey |= 0x8000; 1933eaeb3984SJason Gunthorpe 1934eaeb3984SJason Gunthorpe ndev->broadcast[8] = priv->pkey >> 8; 1935eaeb3984SJason Gunthorpe ndev->broadcast[9] = priv->pkey & 0xff; 1936eaeb3984SJason Gunthorpe set_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags); 1937eaeb3984SJason Gunthorpe 1938eaeb3984SJason Gunthorpe ipoib_set_dev_features(priv); 1939eaeb3984SJason Gunthorpe 1940eaeb3984SJason Gunthorpe rc = ipoib_dev_init(ndev); 1941eaeb3984SJason Gunthorpe if (rc) { 1942eaeb3984SJason Gunthorpe pr_warn("%s: failed to initialize device: %s port %d (ret = %d)\n", 1943eaeb3984SJason Gunthorpe priv->ca->name, priv->dev->name, priv->port, rc); 1944eaeb3984SJason Gunthorpe } 1945eaeb3984SJason Gunthorpe 1946eaeb3984SJason Gunthorpe return 0; 1947eaeb3984SJason Gunthorpe } 1948eaeb3984SJason Gunthorpe 19497cbee87cSJason Gunthorpe static void ipoib_ndo_uninit(struct net_device *dev) 19501da177e4SLinus Torvalds { 195125405d98SJason Gunthorpe struct ipoib_dev_priv *priv = ipoib_priv(dev); 19529baa0b03SOr Gerlitz 19539baa0b03SOr Gerlitz ASSERT_RTNL(); 19541da177e4SLinus Torvalds 195525405d98SJason Gunthorpe /* 195625405d98SJason Gunthorpe * ipoib_remove_one guarantees the children are removed before the 195725405d98SJason Gunthorpe * parent, and that is the only place where a parent can be removed. 195825405d98SJason Gunthorpe */ 195925405d98SJason Gunthorpe WARN_ON(!list_empty(&priv->child_intfs)); 19601da177e4SLinus Torvalds 1961be7aa663SDoug Ledford ipoib_neigh_hash_uninit(dev); 1962be7aa663SDoug Ledford 19631da177e4SLinus Torvalds ipoib_ib_dev_cleanup(dev); 19641da177e4SLinus Torvalds 1965515ed4f3SErez Shitrit /* no more works over the priv->wq */ 1966515ed4f3SErez Shitrit if (priv->wq) { 1967515ed4f3SErez Shitrit flush_workqueue(priv->wq); 1968515ed4f3SErez Shitrit destroy_workqueue(priv->wq); 1969515ed4f3SErez Shitrit priv->wq = NULL; 1970515ed4f3SErez Shitrit } 197113476d35SJason Gunthorpe 197213476d35SJason Gunthorpe if (priv->parent) { 197313476d35SJason Gunthorpe struct ipoib_dev_priv *ppriv = ipoib_priv(priv->parent); 197413476d35SJason Gunthorpe 197513476d35SJason Gunthorpe down_write(&ppriv->vlan_rwsem); 197613476d35SJason Gunthorpe list_del(&priv->list); 197713476d35SJason Gunthorpe up_write(&ppriv->vlan_rwsem); 197813476d35SJason Gunthorpe 197913476d35SJason Gunthorpe dev_put(priv->parent); 198013476d35SJason Gunthorpe } 19811da177e4SLinus Torvalds } 19821da177e4SLinus Torvalds 19839c3c5f8eSEli Cohen static int ipoib_set_vf_link_state(struct net_device *dev, int vf, int link_state) 19849c3c5f8eSEli Cohen { 1985c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 19869c3c5f8eSEli Cohen 19879c3c5f8eSEli Cohen return ib_set_vf_link_state(priv->ca, vf, priv->port, link_state); 19889c3c5f8eSEli Cohen } 19899c3c5f8eSEli Cohen 19909c3c5f8eSEli Cohen static int ipoib_get_vf_config(struct net_device *dev, int vf, 19919c3c5f8eSEli Cohen struct ifla_vf_info *ivf) 19929c3c5f8eSEli Cohen { 1993c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 19949c3c5f8eSEli Cohen int err; 19959c3c5f8eSEli Cohen 19969c3c5f8eSEli Cohen err = ib_get_vf_config(priv->ca, vf, priv->port, ivf); 19979c3c5f8eSEli Cohen if (err) 19989c3c5f8eSEli Cohen return err; 19999c3c5f8eSEli Cohen 20009c3c5f8eSEli Cohen ivf->vf = vf; 20019c3c5f8eSEli Cohen 20029c3c5f8eSEli Cohen return 0; 20039c3c5f8eSEli Cohen } 20049c3c5f8eSEli Cohen 20059c3c5f8eSEli Cohen static int ipoib_set_vf_guid(struct net_device *dev, int vf, u64 guid, int type) 20069c3c5f8eSEli Cohen { 2007c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 20089c3c5f8eSEli Cohen 20099c3c5f8eSEli Cohen if (type != IFLA_VF_IB_NODE_GUID && type != IFLA_VF_IB_PORT_GUID) 20109c3c5f8eSEli Cohen return -EINVAL; 20119c3c5f8eSEli Cohen 20129c3c5f8eSEli Cohen return ib_set_vf_guid(priv->ca, vf, priv->port, guid, type); 20139c3c5f8eSEli Cohen } 20149c3c5f8eSEli Cohen 20159c3c5f8eSEli Cohen static int ipoib_get_vf_stats(struct net_device *dev, int vf, 20169c3c5f8eSEli Cohen struct ifla_vf_stats *vf_stats) 20179c3c5f8eSEli Cohen { 2018c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 20199c3c5f8eSEli Cohen 20209c3c5f8eSEli Cohen return ib_get_vf_stats(priv->ca, vf, priv->port, vf_stats); 20219c3c5f8eSEli Cohen } 20229c3c5f8eSEli Cohen 20233b04dddeSStephen Hemminger static const struct header_ops ipoib_header_ops = { 20243b04dddeSStephen Hemminger .create = ipoib_hard_header, 20253b04dddeSStephen Hemminger }; 20263b04dddeSStephen Hemminger 20279c3c5f8eSEli Cohen static const struct net_device_ops ipoib_netdev_ops_pf = { 2028eaeb3984SJason Gunthorpe .ndo_init = ipoib_ndo_init, 20297cbee87cSJason Gunthorpe .ndo_uninit = ipoib_ndo_uninit, 20309c3c5f8eSEli Cohen .ndo_open = ipoib_open, 20319c3c5f8eSEli Cohen .ndo_stop = ipoib_stop, 20329c3c5f8eSEli Cohen .ndo_change_mtu = ipoib_change_mtu, 20339c3c5f8eSEli Cohen .ndo_fix_features = ipoib_fix_features, 20349c3c5f8eSEli Cohen .ndo_start_xmit = ipoib_start_xmit, 20359c3c5f8eSEli Cohen .ndo_tx_timeout = ipoib_timeout, 20369c3c5f8eSEli Cohen .ndo_set_rx_mode = ipoib_set_mcast_list, 20379c3c5f8eSEli Cohen .ndo_get_iflink = ipoib_get_iflink, 20389c3c5f8eSEli Cohen .ndo_set_vf_link_state = ipoib_set_vf_link_state, 20399c3c5f8eSEli Cohen .ndo_get_vf_config = ipoib_get_vf_config, 20409c3c5f8eSEli Cohen .ndo_get_vf_stats = ipoib_get_vf_stats, 20419c3c5f8eSEli Cohen .ndo_set_vf_guid = ipoib_set_vf_guid, 2042492a7e67SMark Bloch .ndo_set_mac_address = ipoib_set_mac, 2043b6c871e5SErez Shitrit .ndo_get_stats64 = ipoib_get_stats, 204431a82362SFeras Daoud .ndo_do_ioctl = ipoib_ioctl, 20459c3c5f8eSEli Cohen }; 20469c3c5f8eSEli Cohen 20479c3c5f8eSEli Cohen static const struct net_device_ops ipoib_netdev_ops_vf = { 2048eaeb3984SJason Gunthorpe .ndo_init = ipoib_ndo_init, 20497cbee87cSJason Gunthorpe .ndo_uninit = ipoib_ndo_uninit, 2050fe8114e8SStephen Hemminger .ndo_open = ipoib_open, 2051fe8114e8SStephen Hemminger .ndo_stop = ipoib_stop, 2052fe8114e8SStephen Hemminger .ndo_change_mtu = ipoib_change_mtu, 20533d96c74dSMichał Mirosław .ndo_fix_features = ipoib_fix_features, 2054fe8114e8SStephen Hemminger .ndo_start_xmit = ipoib_start_xmit, 2055fe8114e8SStephen Hemminger .ndo_tx_timeout = ipoib_timeout, 2056afc4b13dSJiri Pirko .ndo_set_rx_mode = ipoib_set_mcast_list, 20575aa7add8SNicolas Dichtel .ndo_get_iflink = ipoib_get_iflink, 2058eb54714dSFeras Daoud .ndo_get_stats64 = ipoib_get_stats, 205931a82362SFeras Daoud .ndo_do_ioctl = ipoib_ioctl, 2060fe8114e8SStephen Hemminger }; 2061fe8114e8SStephen Hemminger 2062cd565b4bSErez Shitrit void ipoib_setup_common(struct net_device *dev) 20631da177e4SLinus Torvalds { 20643b04dddeSStephen Hemminger dev->header_ops = &ipoib_header_ops; 2065bea3348eSStephen Hemminger 206682c24c18SEli Cohen ipoib_set_ethtool_ops(dev); 206782c24c18SEli Cohen 20681da177e4SLinus Torvalds dev->watchdog_timeo = HZ; 20691da177e4SLinus Torvalds 20701da177e4SLinus Torvalds dev->flags |= IFF_BROADCAST | IFF_MULTICAST; 20711da177e4SLinus Torvalds 2072fc791b63SPaolo Abeni dev->hard_header_len = IPOIB_HARD_LEN; 20731da177e4SLinus Torvalds dev->addr_len = INFINIBAND_ALEN; 20741da177e4SLinus Torvalds dev->type = ARPHRD_INFINIBAND; 20750f485251SShirley Ma dev->tx_queue_len = ipoib_sendq_size * 2; 2076eb14032fSEli Cohen dev->features = (NETIF_F_VLAN_CHALLENGED | 2077eb14032fSEli Cohen NETIF_F_HIGHDMA); 207802875878SEric Dumazet netif_keep_dst(dev); 20791da177e4SLinus Torvalds 20801da177e4SLinus Torvalds memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN); 20819f49a5b5SJason Gunthorpe 20829f49a5b5SJason Gunthorpe /* 20839f49a5b5SJason Gunthorpe * unregister_netdev always frees the netdev, we use this mode 20849f49a5b5SJason Gunthorpe * consistently to unify all the various unregister paths, including 20859f49a5b5SJason Gunthorpe * those connected to rtnl_link_ops which require it. 20869f49a5b5SJason Gunthorpe */ 20879f49a5b5SJason Gunthorpe dev->needs_free_netdev = true; 2088cd565b4bSErez Shitrit } 2089cd565b4bSErez Shitrit 2090cd565b4bSErez Shitrit static void ipoib_build_priv(struct net_device *dev) 2091cd565b4bSErez Shitrit { 2092cd565b4bSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 20931da177e4SLinus Torvalds 20941da177e4SLinus Torvalds priv->dev = dev; 20951da177e4SLinus Torvalds spin_lock_init(&priv->lock); 2096f47944ccSErez Shitrit init_rwsem(&priv->vlan_rwsem); 2097edf3f301SFeras Daoud mutex_init(&priv->mcast_mutex); 20981da177e4SLinus Torvalds 20991da177e4SLinus Torvalds INIT_LIST_HEAD(&priv->path_list); 21001da177e4SLinus Torvalds INIT_LIST_HEAD(&priv->child_intfs); 21011da177e4SLinus Torvalds INIT_LIST_HEAD(&priv->dead_ahs); 21021da177e4SLinus Torvalds INIT_LIST_HEAD(&priv->multicast_list); 21031da177e4SLinus Torvalds 2104c4028958SDavid Howells INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); 2105e8224e4bSYossi Etigin INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task); 2106ee1e2c82SMoni Shoua INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light); 2107ee1e2c82SMoni Shoua INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal); 2108ee1e2c82SMoni Shoua INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy); 2109c4028958SDavid Howells INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); 2110c4028958SDavid Howells INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); 2111b63b70d8SShlomo Pongratz INIT_DELAYED_WORK(&priv->neigh_reap_task, ipoib_reap_neigh); 21121da177e4SLinus Torvalds } 21131da177e4SLinus Torvalds 2114cd565b4bSErez Shitrit static const struct net_device_ops ipoib_netdev_default_pf = { 2115cd565b4bSErez Shitrit .ndo_init = ipoib_dev_init_default, 2116cd565b4bSErez Shitrit .ndo_uninit = ipoib_dev_uninit_default, 2117cd565b4bSErez Shitrit .ndo_open = ipoib_ib_dev_open_default, 2118cd565b4bSErez Shitrit .ndo_stop = ipoib_ib_dev_stop_default, 2119cd565b4bSErez Shitrit }; 2120cd565b4bSErez Shitrit 21215d6b0cb3SDenis Drozdov static struct net_device *ipoib_alloc_netdev(struct ib_device *hca, u8 port, 2122cd565b4bSErez Shitrit const char *name) 2123cd565b4bSErez Shitrit { 2124cd565b4bSErez Shitrit struct net_device *dev; 2125cd565b4bSErez Shitrit 2126f6a8a19bSDenis Drozdov dev = rdma_alloc_netdev(hca, port, RDMA_NETDEV_IPOIB, name, 2127f6a8a19bSDenis Drozdov NET_NAME_UNKNOWN, ipoib_setup_common); 21285d6b0cb3SDenis Drozdov if (!IS_ERR(dev) || PTR_ERR(dev) != -EOPNOTSUPP) 2129cd565b4bSErez Shitrit return dev; 2130f6a8a19bSDenis Drozdov 21315d6b0cb3SDenis Drozdov dev = alloc_netdev(sizeof(struct rdma_netdev), name, NET_NAME_UNKNOWN, 2132f6a8a19bSDenis Drozdov ipoib_setup_common); 21335d6b0cb3SDenis Drozdov if (!dev) 21345d6b0cb3SDenis Drozdov return ERR_PTR(-ENOMEM); 21355d6b0cb3SDenis Drozdov return dev; 2136cd565b4bSErez Shitrit } 2137cd565b4bSErez Shitrit 21385d6b0cb3SDenis Drozdov int ipoib_intf_init(struct ib_device *hca, u8 port, const char *name, 21395d6b0cb3SDenis Drozdov struct net_device *dev) 2140cd565b4bSErez Shitrit { 21415d6b0cb3SDenis Drozdov struct rdma_netdev *rn = netdev_priv(dev); 2142cd565b4bSErez Shitrit struct ipoib_dev_priv *priv; 21435d6b0cb3SDenis Drozdov int rc; 2144cd565b4bSErez Shitrit 2145cd565b4bSErez Shitrit priv = kzalloc(sizeof(*priv), GFP_KERNEL); 2146cd565b4bSErez Shitrit if (!priv) 21475d6b0cb3SDenis Drozdov return -ENOMEM; 2148cd565b4bSErez Shitrit 2149eaeb3984SJason Gunthorpe priv->ca = hca; 2150eaeb3984SJason Gunthorpe priv->port = port; 2151eaeb3984SJason Gunthorpe 21525d6b0cb3SDenis Drozdov rc = rdma_init_netdev(hca, port, RDMA_NETDEV_IPOIB, name, 21535d6b0cb3SDenis Drozdov NET_NAME_UNKNOWN, ipoib_setup_common, dev); 21545d6b0cb3SDenis Drozdov if (rc) { 21555d6b0cb3SDenis Drozdov if (rc != -EOPNOTSUPP) 21565d6b0cb3SDenis Drozdov goto out; 21575d6b0cb3SDenis Drozdov 21585d6b0cb3SDenis Drozdov dev->netdev_ops = &ipoib_netdev_default_pf; 21595d6b0cb3SDenis Drozdov rn->send = ipoib_send; 21605d6b0cb3SDenis Drozdov rn->attach_mcast = ipoib_mcast_attach; 21615d6b0cb3SDenis Drozdov rn->detach_mcast = ipoib_mcast_detach; 21625d6b0cb3SDenis Drozdov rn->hca = hca; 21635d6b0cb3SDenis Drozdov } 2164cd565b4bSErez Shitrit 2165cd565b4bSErez Shitrit priv->rn_ops = dev->netdev_ops; 2166cd565b4bSErez Shitrit 21675d6b0cb3SDenis Drozdov if (hca->attrs.device_cap_flags & IB_DEVICE_VIRTUAL_FUNCTION) 2168cd565b4bSErez Shitrit dev->netdev_ops = &ipoib_netdev_ops_vf; 2169cd565b4bSErez Shitrit else 2170cd565b4bSErez Shitrit dev->netdev_ops = &ipoib_netdev_ops_pf; 2171cd565b4bSErez Shitrit 2172cd565b4bSErez Shitrit rn->clnt_priv = priv; 21739f49a5b5SJason Gunthorpe /* 21749f49a5b5SJason Gunthorpe * Only the child register_netdev flows can handle priv_destructor 21759f49a5b5SJason Gunthorpe * being set, so we force it to NULL here and handle manually until it 21769f49a5b5SJason Gunthorpe * is safe to turn on. 21779f49a5b5SJason Gunthorpe */ 21789f49a5b5SJason Gunthorpe priv->next_priv_destructor = dev->priv_destructor; 21799f49a5b5SJason Gunthorpe dev->priv_destructor = NULL; 21809f49a5b5SJason Gunthorpe 2181cd565b4bSErez Shitrit ipoib_build_priv(dev); 2182cd565b4bSErez Shitrit 21835d6b0cb3SDenis Drozdov return 0; 21845d6b0cb3SDenis Drozdov 21855d6b0cb3SDenis Drozdov out: 2186cd565b4bSErez Shitrit kfree(priv); 21875d6b0cb3SDenis Drozdov return rc; 21885d6b0cb3SDenis Drozdov } 21895d6b0cb3SDenis Drozdov 21905d6b0cb3SDenis Drozdov struct net_device *ipoib_intf_alloc(struct ib_device *hca, u8 port, 21915d6b0cb3SDenis Drozdov const char *name) 21925d6b0cb3SDenis Drozdov { 21935d6b0cb3SDenis Drozdov struct net_device *dev; 21945d6b0cb3SDenis Drozdov int rc; 21955d6b0cb3SDenis Drozdov 21965d6b0cb3SDenis Drozdov dev = ipoib_alloc_netdev(hca, port, name); 21975d6b0cb3SDenis Drozdov if (IS_ERR(dev)) 21985d6b0cb3SDenis Drozdov return dev; 21995d6b0cb3SDenis Drozdov 22005d6b0cb3SDenis Drozdov rc = ipoib_intf_init(hca, port, name, dev); 22015d6b0cb3SDenis Drozdov if (rc) { 22025d6b0cb3SDenis Drozdov free_netdev(dev); 22035d6b0cb3SDenis Drozdov return ERR_PTR(rc); 22045d6b0cb3SDenis Drozdov } 22055d6b0cb3SDenis Drozdov 22065d6b0cb3SDenis Drozdov /* 22075d6b0cb3SDenis Drozdov * Upon success the caller must ensure ipoib_intf_free is called or 22085d6b0cb3SDenis Drozdov * register_netdevice succeed'd and priv_destructor is set to 22095d6b0cb3SDenis Drozdov * ipoib_intf_free. 22105d6b0cb3SDenis Drozdov */ 22115d6b0cb3SDenis Drozdov return dev; 22121da177e4SLinus Torvalds } 22131da177e4SLinus Torvalds 22149f49a5b5SJason Gunthorpe void ipoib_intf_free(struct net_device *dev) 22159f49a5b5SJason Gunthorpe { 22169f49a5b5SJason Gunthorpe struct ipoib_dev_priv *priv = ipoib_priv(dev); 22179f49a5b5SJason Gunthorpe struct rdma_netdev *rn = netdev_priv(dev); 22189f49a5b5SJason Gunthorpe 22199f49a5b5SJason Gunthorpe dev->priv_destructor = priv->next_priv_destructor; 22209f49a5b5SJason Gunthorpe if (dev->priv_destructor) 22219f49a5b5SJason Gunthorpe dev->priv_destructor(dev); 22229f49a5b5SJason Gunthorpe 22239f49a5b5SJason Gunthorpe /* 22249f49a5b5SJason Gunthorpe * There are some error flows around register_netdev failing that may 22259f49a5b5SJason Gunthorpe * attempt to call priv_destructor twice, prevent that from happening. 22269f49a5b5SJason Gunthorpe */ 22279f49a5b5SJason Gunthorpe dev->priv_destructor = NULL; 22289f49a5b5SJason Gunthorpe 22299f49a5b5SJason Gunthorpe /* unregister/destroy is very complicated. Make bugs more obvious. */ 22309f49a5b5SJason Gunthorpe rn->clnt_priv = NULL; 22319f49a5b5SJason Gunthorpe 22329f49a5b5SJason Gunthorpe kfree(priv); 22339f49a5b5SJason Gunthorpe } 22349f49a5b5SJason Gunthorpe 223543cb76d9SGreg Kroah-Hartman static ssize_t show_pkey(struct device *dev, 223643cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 22371da177e4SLinus Torvalds { 2238c1048affSErez Shitrit struct net_device *ndev = to_net_dev(dev); 2239c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(ndev); 22401da177e4SLinus Torvalds 22411da177e4SLinus Torvalds return sprintf(buf, "0x%04x\n", priv->pkey); 22421da177e4SLinus Torvalds } 224343cb76d9SGreg Kroah-Hartman static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); 22441da177e4SLinus Torvalds 2245335a64a5SOr Gerlitz static ssize_t show_umcast(struct device *dev, 2246335a64a5SOr Gerlitz struct device_attribute *attr, char *buf) 2247335a64a5SOr Gerlitz { 2248c1048affSErez Shitrit struct net_device *ndev = to_net_dev(dev); 2249c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(ndev); 2250335a64a5SOr Gerlitz 2251335a64a5SOr Gerlitz return sprintf(buf, "%d\n", test_bit(IPOIB_FLAG_UMCAST, &priv->flags)); 2252335a64a5SOr Gerlitz } 2253335a64a5SOr Gerlitz 2254862096a8SOr Gerlitz void ipoib_set_umcast(struct net_device *ndev, int umcast_val) 2255335a64a5SOr Gerlitz { 2256c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(ndev); 2257335a64a5SOr Gerlitz 2258335a64a5SOr Gerlitz if (umcast_val > 0) { 2259335a64a5SOr Gerlitz set_bit(IPOIB_FLAG_UMCAST, &priv->flags); 2260335a64a5SOr Gerlitz ipoib_warn(priv, "ignoring multicast groups joined directly " 2261335a64a5SOr Gerlitz "by userspace\n"); 2262335a64a5SOr Gerlitz } else 2263335a64a5SOr Gerlitz clear_bit(IPOIB_FLAG_UMCAST, &priv->flags); 2264862096a8SOr Gerlitz } 2265862096a8SOr Gerlitz 2266862096a8SOr Gerlitz static ssize_t set_umcast(struct device *dev, 2267862096a8SOr Gerlitz struct device_attribute *attr, 2268862096a8SOr Gerlitz const char *buf, size_t count) 2269862096a8SOr Gerlitz { 2270862096a8SOr Gerlitz unsigned long umcast_val = simple_strtoul(buf, NULL, 0); 2271862096a8SOr Gerlitz 2272862096a8SOr Gerlitz ipoib_set_umcast(to_net_dev(dev), umcast_val); 2273335a64a5SOr Gerlitz 2274335a64a5SOr Gerlitz return count; 2275335a64a5SOr Gerlitz } 2276335a64a5SOr Gerlitz static DEVICE_ATTR(umcast, S_IWUSR | S_IRUGO, show_umcast, set_umcast); 2277335a64a5SOr Gerlitz 2278335a64a5SOr Gerlitz int ipoib_add_umcast_attr(struct net_device *dev) 2279335a64a5SOr Gerlitz { 2280335a64a5SOr Gerlitz return device_create_file(&dev->dev, &dev_attr_umcast); 2281335a64a5SOr Gerlitz } 2282335a64a5SOr Gerlitz 2283492a7e67SMark Bloch static void set_base_guid(struct ipoib_dev_priv *priv, union ib_gid *gid) 2284492a7e67SMark Bloch { 2285492a7e67SMark Bloch struct ipoib_dev_priv *child_priv; 2286492a7e67SMark Bloch struct net_device *netdev = priv->dev; 2287492a7e67SMark Bloch 22889b29953bSMark Bloch netif_addr_lock_bh(netdev); 2289492a7e67SMark Bloch 2290492a7e67SMark Bloch memcpy(&priv->local_gid.global.interface_id, 2291492a7e67SMark Bloch &gid->global.interface_id, 2292492a7e67SMark Bloch sizeof(gid->global.interface_id)); 2293492a7e67SMark Bloch memcpy(netdev->dev_addr + 4, &priv->local_gid, sizeof(priv->local_gid)); 2294492a7e67SMark Bloch clear_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags); 2295492a7e67SMark Bloch 22969b29953bSMark Bloch netif_addr_unlock_bh(netdev); 2297492a7e67SMark Bloch 2298492a7e67SMark Bloch if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 2299492a7e67SMark Bloch down_read(&priv->vlan_rwsem); 2300492a7e67SMark Bloch list_for_each_entry(child_priv, &priv->child_intfs, list) 2301492a7e67SMark Bloch set_base_guid(child_priv, gid); 2302492a7e67SMark Bloch up_read(&priv->vlan_rwsem); 2303492a7e67SMark Bloch } 2304492a7e67SMark Bloch } 2305492a7e67SMark Bloch 2306492a7e67SMark Bloch static int ipoib_check_lladdr(struct net_device *dev, 2307492a7e67SMark Bloch struct sockaddr_storage *ss) 2308492a7e67SMark Bloch { 2309492a7e67SMark Bloch union ib_gid *gid = (union ib_gid *)(ss->__data + 4); 2310492a7e67SMark Bloch int ret = 0; 2311492a7e67SMark Bloch 23129b29953bSMark Bloch netif_addr_lock_bh(dev); 2313492a7e67SMark Bloch 2314492a7e67SMark Bloch /* Make sure the QPN, reserved and subnet prefix match the current 2315492a7e67SMark Bloch * lladdr, it also makes sure the lladdr is unicast. 2316492a7e67SMark Bloch */ 2317492a7e67SMark Bloch if (memcmp(dev->dev_addr, ss->__data, 2318492a7e67SMark Bloch 4 + sizeof(gid->global.subnet_prefix)) || 2319492a7e67SMark Bloch gid->global.interface_id == 0) 2320492a7e67SMark Bloch ret = -EINVAL; 2321492a7e67SMark Bloch 23229b29953bSMark Bloch netif_addr_unlock_bh(dev); 2323492a7e67SMark Bloch 2324492a7e67SMark Bloch return ret; 2325492a7e67SMark Bloch } 2326492a7e67SMark Bloch 2327492a7e67SMark Bloch static int ipoib_set_mac(struct net_device *dev, void *addr) 2328492a7e67SMark Bloch { 2329c1048affSErez Shitrit struct ipoib_dev_priv *priv = ipoib_priv(dev); 2330492a7e67SMark Bloch struct sockaddr_storage *ss = addr; 2331492a7e67SMark Bloch int ret; 2332492a7e67SMark Bloch 2333492a7e67SMark Bloch if (!(dev->priv_flags & IFF_LIVE_ADDR_CHANGE) && netif_running(dev)) 2334492a7e67SMark Bloch return -EBUSY; 2335492a7e67SMark Bloch 2336492a7e67SMark Bloch ret = ipoib_check_lladdr(dev, ss); 2337492a7e67SMark Bloch if (ret) 2338492a7e67SMark Bloch return ret; 2339492a7e67SMark Bloch 2340492a7e67SMark Bloch set_base_guid(priv, (union ib_gid *)(ss->__data + 4)); 2341492a7e67SMark Bloch 2342492a7e67SMark Bloch queue_work(ipoib_workqueue, &priv->flush_light); 2343492a7e67SMark Bloch 2344492a7e67SMark Bloch return 0; 2345492a7e67SMark Bloch } 2346492a7e67SMark Bloch 234743cb76d9SGreg Kroah-Hartman static ssize_t create_child(struct device *dev, 234843cb76d9SGreg Kroah-Hartman struct device_attribute *attr, 23491da177e4SLinus Torvalds const char *buf, size_t count) 23501da177e4SLinus Torvalds { 23511da177e4SLinus Torvalds int pkey; 23521da177e4SLinus Torvalds int ret; 23531da177e4SLinus Torvalds 23541da177e4SLinus Torvalds if (sscanf(buf, "%i", &pkey) != 1) 23551da177e4SLinus Torvalds return -EINVAL; 23561da177e4SLinus Torvalds 23573d790a4cSOr Gerlitz if (pkey <= 0 || pkey > 0xffff || pkey == 0x8000) 23581da177e4SLinus Torvalds return -EINVAL; 23591da177e4SLinus Torvalds 236043cb76d9SGreg Kroah-Hartman ret = ipoib_vlan_add(to_net_dev(dev), pkey); 23611da177e4SLinus Torvalds 23621da177e4SLinus Torvalds return ret ? ret : count; 23631da177e4SLinus Torvalds } 23647a52b34bSOr Gerlitz static DEVICE_ATTR(create_child, S_IWUSR, NULL, create_child); 23651da177e4SLinus Torvalds 236643cb76d9SGreg Kroah-Hartman static ssize_t delete_child(struct device *dev, 236743cb76d9SGreg Kroah-Hartman struct device_attribute *attr, 23681da177e4SLinus Torvalds const char *buf, size_t count) 23691da177e4SLinus Torvalds { 23701da177e4SLinus Torvalds int pkey; 23711da177e4SLinus Torvalds int ret; 23721da177e4SLinus Torvalds 23731da177e4SLinus Torvalds if (sscanf(buf, "%i", &pkey) != 1) 23741da177e4SLinus Torvalds return -EINVAL; 23751da177e4SLinus Torvalds 23761da177e4SLinus Torvalds if (pkey < 0 || pkey > 0xffff) 23771da177e4SLinus Torvalds return -EINVAL; 23781da177e4SLinus Torvalds 237943cb76d9SGreg Kroah-Hartman ret = ipoib_vlan_delete(to_net_dev(dev), pkey); 23801da177e4SLinus Torvalds 23811da177e4SLinus Torvalds return ret ? ret : count; 23821da177e4SLinus Torvalds 23831da177e4SLinus Torvalds } 23847a52b34bSOr Gerlitz static DEVICE_ATTR(delete_child, S_IWUSR, NULL, delete_child); 23851da177e4SLinus Torvalds 23861da177e4SLinus Torvalds int ipoib_add_pkey_attr(struct net_device *dev) 23871da177e4SLinus Torvalds { 238843cb76d9SGreg Kroah-Hartman return device_create_file(&dev->dev, &dev_attr_pkey); 23891da177e4SLinus Torvalds } 23901da177e4SLinus Torvalds 2391f6350da4SArseny Maslennikov /* 2392f6350da4SArseny Maslennikov * We erroneously exposed the iface's port number in the dev_id 2393f6350da4SArseny Maslennikov * sysfs field long after dev_port was introduced for that purpose[1], 2394f6350da4SArseny Maslennikov * and we need to stop everyone from relying on that. 2395f6350da4SArseny Maslennikov * Let's overload the shower routine for the dev_id file here 2396f6350da4SArseny Maslennikov * to gently bring the issue up. 2397f6350da4SArseny Maslennikov * 2398f6350da4SArseny Maslennikov * [1] https://www.spinics.net/lists/netdev/msg272123.html 2399f6350da4SArseny Maslennikov */ 2400f6350da4SArseny Maslennikov static ssize_t dev_id_show(struct device *dev, 2401f6350da4SArseny Maslennikov struct device_attribute *attr, char *buf) 2402f6350da4SArseny Maslennikov { 2403f6350da4SArseny Maslennikov struct net_device *ndev = to_net_dev(dev); 2404f6350da4SArseny Maslennikov 2405f6350da4SArseny Maslennikov if (ndev->dev_id == ndev->dev_port) 2406f6350da4SArseny Maslennikov netdev_info_once(ndev, 2407f6350da4SArseny Maslennikov "\"%s\" wants to know my dev_id. Should it look at dev_port instead? See Documentation/ABI/testing/sysfs-class-net for more info.\n", 2408f6350da4SArseny Maslennikov current->comm); 2409f6350da4SArseny Maslennikov 2410f6350da4SArseny Maslennikov return sprintf(buf, "%#x\n", ndev->dev_id); 2411f6350da4SArseny Maslennikov } 2412f6350da4SArseny Maslennikov static DEVICE_ATTR_RO(dev_id); 2413f6350da4SArseny Maslennikov 2414f6350da4SArseny Maslennikov int ipoib_intercept_dev_id_attr(struct net_device *dev) 2415f6350da4SArseny Maslennikov { 2416f6350da4SArseny Maslennikov device_remove_file(&dev->dev, &dev_attr_dev_id); 2417f6350da4SArseny Maslennikov return device_create_file(&dev->dev, &dev_attr_dev_id); 2418f6350da4SArseny Maslennikov } 2419f6350da4SArseny Maslennikov 24201da177e4SLinus Torvalds static struct net_device *ipoib_add_port(const char *format, 24211da177e4SLinus Torvalds struct ib_device *hca, u8 port) 24221da177e4SLinus Torvalds { 24235d6b0cb3SDenis Drozdov struct rtnl_link_ops *ops = ipoib_get_link_ops(); 24245d6b0cb3SDenis Drozdov struct rdma_netdev_alloc_params params; 24251da177e4SLinus Torvalds struct ipoib_dev_priv *priv; 24269f49a5b5SJason Gunthorpe struct net_device *ndev; 2427eaeb3984SJason Gunthorpe int result; 24281da177e4SLinus Torvalds 24295d6b0cb3SDenis Drozdov ndev = ipoib_intf_alloc(hca, port, format); 24305d6b0cb3SDenis Drozdov if (IS_ERR(ndev)) { 24315d6b0cb3SDenis Drozdov pr_warn("%s, %d: ipoib_intf_alloc failed %ld\n", hca->name, port, 24325d6b0cb3SDenis Drozdov PTR_ERR(ndev)); 24335d6b0cb3SDenis Drozdov return ndev; 24341da177e4SLinus Torvalds } 24355d6b0cb3SDenis Drozdov priv = ipoib_priv(ndev); 24361da177e4SLinus Torvalds 24371da177e4SLinus Torvalds INIT_IB_EVENT_HANDLER(&priv->event_handler, 24381da177e4SLinus Torvalds priv->ca, ipoib_event); 2439dcc9881eSLeon Romanovsky ib_register_event_handler(&priv->event_handler); 24401da177e4SLinus Torvalds 244110293610SAlex Estrin /* call event handler to ensure pkey in sync */ 244210293610SAlex Estrin queue_work(ipoib_workqueue, &priv->flush_heavy); 244310293610SAlex Estrin 24449f49a5b5SJason Gunthorpe result = register_netdev(ndev); 24451da177e4SLinus Torvalds if (result) { 2446c55359a2SYuval Shaia pr_warn("%s: couldn't register ipoib port %d; error %d\n", 24471da177e4SLinus Torvalds hca->name, port, result); 24481da177e4SLinus Torvalds 24499f49a5b5SJason Gunthorpe ipoib_parent_unregister_pre(ndev); 24509f49a5b5SJason Gunthorpe ipoib_intf_free(ndev); 24519f49a5b5SJason Gunthorpe free_netdev(ndev); 24521da177e4SLinus Torvalds 24531da177e4SLinus Torvalds return ERR_PTR(result); 24541da177e4SLinus Torvalds } 24551da177e4SLinus Torvalds 24565d6b0cb3SDenis Drozdov if (hca->rdma_netdev_get_params) { 24575d6b0cb3SDenis Drozdov int rc = hca->rdma_netdev_get_params(hca, port, 24585d6b0cb3SDenis Drozdov RDMA_NETDEV_IPOIB, 24595d6b0cb3SDenis Drozdov ¶ms); 24605d6b0cb3SDenis Drozdov 24615d6b0cb3SDenis Drozdov if (!rc && ops->priv_size < params.sizeof_priv) 24625d6b0cb3SDenis Drozdov ops->priv_size = params.sizeof_priv; 24635d6b0cb3SDenis Drozdov } 24649f49a5b5SJason Gunthorpe /* 24659f49a5b5SJason Gunthorpe * We cannot set priv_destructor before register_netdev because we 24669f49a5b5SJason Gunthorpe * need priv to be always valid during the error flow to execute 24679f49a5b5SJason Gunthorpe * ipoib_parent_unregister_pre(). Instead handle it manually and only 24689f49a5b5SJason Gunthorpe * enter priv_destructor mode once we are completely registered. 24699f49a5b5SJason Gunthorpe */ 24709f49a5b5SJason Gunthorpe ndev->priv_destructor = ipoib_intf_free; 24719f49a5b5SJason Gunthorpe 2472f6350da4SArseny Maslennikov if (ipoib_intercept_dev_id_attr(ndev)) 2473f6350da4SArseny Maslennikov goto sysfs_failed; 24749f49a5b5SJason Gunthorpe if (ipoib_cm_add_mode_attr(ndev)) 24759f49a5b5SJason Gunthorpe goto sysfs_failed; 24769f49a5b5SJason Gunthorpe if (ipoib_add_pkey_attr(ndev)) 24779f49a5b5SJason Gunthorpe goto sysfs_failed; 24789f49a5b5SJason Gunthorpe if (ipoib_add_umcast_attr(ndev)) 24799f49a5b5SJason Gunthorpe goto sysfs_failed; 24809f49a5b5SJason Gunthorpe if (device_create_file(&ndev->dev, &dev_attr_create_child)) 24819f49a5b5SJason Gunthorpe goto sysfs_failed; 24829f49a5b5SJason Gunthorpe if (device_create_file(&ndev->dev, &dev_attr_delete_child)) 24839f49a5b5SJason Gunthorpe goto sysfs_failed; 24849f49a5b5SJason Gunthorpe 24859f49a5b5SJason Gunthorpe return ndev; 24869f49a5b5SJason Gunthorpe 24879f49a5b5SJason Gunthorpe sysfs_failed: 24889f49a5b5SJason Gunthorpe ipoib_parent_unregister_pre(ndev); 24899f49a5b5SJason Gunthorpe unregister_netdev(ndev); 24909f49a5b5SJason Gunthorpe return ERR_PTR(-ENOMEM); 24919f49a5b5SJason Gunthorpe } 24929f49a5b5SJason Gunthorpe 24931da177e4SLinus Torvalds static void ipoib_add_one(struct ib_device *device) 24941da177e4SLinus Torvalds { 24951da177e4SLinus Torvalds struct list_head *dev_list; 24961da177e4SLinus Torvalds struct net_device *dev; 24971da177e4SLinus Torvalds struct ipoib_dev_priv *priv; 24984139032bSHal Rosenstock int p; 24998e37ab68SMichael Wang int count = 0; 250007ebafbaSTom Tucker 2501b1b63970SKamal Heib dev_list = kmalloc(sizeof(*dev_list), GFP_KERNEL); 25021da177e4SLinus Torvalds if (!dev_list) 25031da177e4SLinus Torvalds return; 25041da177e4SLinus Torvalds 25051da177e4SLinus Torvalds INIT_LIST_HEAD(dev_list); 25061da177e4SLinus Torvalds 25074139032bSHal Rosenstock for (p = rdma_start_port(device); p <= rdma_end_port(device); ++p) { 25088e37ab68SMichael Wang if (!rdma_protocol_ib(device, p)) 25097b4c8769SEli Cohen continue; 25101da177e4SLinus Torvalds dev = ipoib_add_port("ib%d", device, p); 25111da177e4SLinus Torvalds if (!IS_ERR(dev)) { 2512c1048affSErez Shitrit priv = ipoib_priv(dev); 25131da177e4SLinus Torvalds list_add_tail(&priv->list, dev_list); 25148e37ab68SMichael Wang count++; 25151da177e4SLinus Torvalds } 25161da177e4SLinus Torvalds } 25171da177e4SLinus Torvalds 25188e37ab68SMichael Wang if (!count) { 2519ac6dbf7fSYuval Shaia kfree(dev_list); 25208e37ab68SMichael Wang return; 25218e37ab68SMichael Wang } 25228e37ab68SMichael Wang 25231da177e4SLinus Torvalds ib_set_client_data(device, &ipoib_client, dev_list); 25241da177e4SLinus Torvalds } 25251da177e4SLinus Torvalds 25267c1eb45aSHaggai Eran static void ipoib_remove_one(struct ib_device *device, void *client_data) 25271da177e4SLinus Torvalds { 252825405d98SJason Gunthorpe struct ipoib_dev_priv *priv, *tmp, *cpriv, *tcpriv; 25297c1eb45aSHaggai Eran struct list_head *dev_list = client_data; 25301da177e4SLinus Torvalds 25315a2815f0SItai Garbi if (!dev_list) 25325a2815f0SItai Garbi return; 25331da177e4SLinus Torvalds 25341da177e4SLinus Torvalds list_for_each_entry_safe(priv, tmp, dev_list, list) { 253525405d98SJason Gunthorpe LIST_HEAD(head); 25367cbee87cSJason Gunthorpe ipoib_parent_unregister_pre(priv->dev); 25371da177e4SLinus Torvalds 253825405d98SJason Gunthorpe rtnl_lock(); 253925405d98SJason Gunthorpe 254025405d98SJason Gunthorpe list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, 254125405d98SJason Gunthorpe list) 254225405d98SJason Gunthorpe unregister_netdevice_queue(cpriv->dev, &head); 254325405d98SJason Gunthorpe unregister_netdevice_queue(priv->dev, &head); 254425405d98SJason Gunthorpe unregister_netdevice_many(&head); 254525405d98SJason Gunthorpe 254625405d98SJason Gunthorpe rtnl_unlock(); 25471da177e4SLinus Torvalds } 254806c56e44SMichael S. Tsirkin 254906c56e44SMichael S. Tsirkin kfree(dev_list); 25501da177e4SLinus Torvalds } 25511da177e4SLinus Torvalds 2552771a5258SShamir Rabinovitch #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 2553771a5258SShamir Rabinovitch static struct notifier_block ipoib_netdev_notifier = { 2554771a5258SShamir Rabinovitch .notifier_call = ipoib_netdev_event, 2555771a5258SShamir Rabinovitch }; 2556771a5258SShamir Rabinovitch #endif 2557771a5258SShamir Rabinovitch 25581da177e4SLinus Torvalds static int __init ipoib_init_module(void) 25591da177e4SLinus Torvalds { 25601da177e4SLinus Torvalds int ret; 25611da177e4SLinus Torvalds 25620f485251SShirley Ma ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); 25630f485251SShirley Ma ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); 25640f485251SShirley Ma ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); 25650f485251SShirley Ma 25660f485251SShirley Ma ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); 25670f485251SShirley Ma ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); 2568732eacc0SHagen Paul Pfeifer ipoib_sendq_size = max3(ipoib_sendq_size, 2 * MAX_SEND_CQE, IPOIB_MIN_QUEUE_SIZE); 256968e995a2SPradeep Satyanarayana #ifdef CONFIG_INFINIBAND_IPOIB_CM 257068e995a2SPradeep Satyanarayana ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP); 257111f74b40SAlex Vesker ipoib_max_conn_qp = max(ipoib_max_conn_qp, 0); 257268e995a2SPradeep Satyanarayana #endif 25730f485251SShirley Ma 2574f89271daSEli Cohen /* 2575f89271daSEli Cohen * When copying small received packets, we only copy from the 2576f89271daSEli Cohen * linear data part of the SKB, so we rely on this condition. 2577f89271daSEli Cohen */ 2578f89271daSEli Cohen BUILD_BUG_ON(IPOIB_CM_COPYBREAK > IPOIB_CM_HEAD_SIZE); 2579f89271daSEli Cohen 25801da177e4SLinus Torvalds ret = ipoib_register_debugfs(); 25811da177e4SLinus Torvalds if (ret) 25821da177e4SLinus Torvalds return ret; 25831da177e4SLinus Torvalds 25841da177e4SLinus Torvalds /* 25850b39578bSDoug Ledford * We create a global workqueue here that is used for all flush 25860b39578bSDoug Ledford * operations. However, if you attempt to flush a workqueue 25870b39578bSDoug Ledford * from a task on that same workqueue, it deadlocks the system. 25880b39578bSDoug Ledford * We want to be able to flush the tasks associated with a 25890b39578bSDoug Ledford * specific net device, so we also create a workqueue for each 25900b39578bSDoug Ledford * netdevice. We queue up the tasks for that device only on 25910b39578bSDoug Ledford * its private workqueue, and we only queue up flush events 25920b39578bSDoug Ledford * on our global flush workqueue. This avoids the deadlocks. 25931da177e4SLinus Torvalds */ 2594ee190ab7SJason Gunthorpe ipoib_workqueue = alloc_ordered_workqueue("ipoib_flush", 0); 25951da177e4SLinus Torvalds if (!ipoib_workqueue) { 25961da177e4SLinus Torvalds ret = -ENOMEM; 25971da177e4SLinus Torvalds goto err_fs; 25981da177e4SLinus Torvalds } 25991da177e4SLinus Torvalds 2600c1a0b23bSMichael S. Tsirkin ib_sa_register_client(&ipoib_sa_client); 2601c1a0b23bSMichael S. Tsirkin 26021da177e4SLinus Torvalds ret = ib_register_client(&ipoib_client); 26031da177e4SLinus Torvalds if (ret) 2604c1a0b23bSMichael S. Tsirkin goto err_sa; 26051da177e4SLinus Torvalds 26069baa0b03SOr Gerlitz ret = ipoib_netlink_init(); 26079baa0b03SOr Gerlitz if (ret) 26089baa0b03SOr Gerlitz goto err_client; 26099baa0b03SOr Gerlitz 2610771a5258SShamir Rabinovitch #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 2611771a5258SShamir Rabinovitch register_netdevice_notifier(&ipoib_netdev_notifier); 2612771a5258SShamir Rabinovitch #endif 26131da177e4SLinus Torvalds return 0; 26141da177e4SLinus Torvalds 26159baa0b03SOr Gerlitz err_client: 26169baa0b03SOr Gerlitz ib_unregister_client(&ipoib_client); 26179baa0b03SOr Gerlitz 2618c1a0b23bSMichael S. Tsirkin err_sa: 2619c1a0b23bSMichael S. Tsirkin ib_sa_unregister_client(&ipoib_sa_client); 26201da177e4SLinus Torvalds destroy_workqueue(ipoib_workqueue); 26211da177e4SLinus Torvalds 26229adec1a8SRoland Dreier err_fs: 26239adec1a8SRoland Dreier ipoib_unregister_debugfs(); 26249adec1a8SRoland Dreier 26251da177e4SLinus Torvalds return ret; 26261da177e4SLinus Torvalds } 26271da177e4SLinus Torvalds 26281da177e4SLinus Torvalds static void __exit ipoib_cleanup_module(void) 26291da177e4SLinus Torvalds { 2630771a5258SShamir Rabinovitch #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 2631771a5258SShamir Rabinovitch unregister_netdevice_notifier(&ipoib_netdev_notifier); 2632771a5258SShamir Rabinovitch #endif 26339baa0b03SOr Gerlitz ipoib_netlink_fini(); 26341da177e4SLinus Torvalds ib_unregister_client(&ipoib_client); 2635c1a0b23bSMichael S. Tsirkin ib_sa_unregister_client(&ipoib_sa_client); 26369adec1a8SRoland Dreier ipoib_unregister_debugfs(); 26371da177e4SLinus Torvalds destroy_workqueue(ipoib_workqueue); 26381da177e4SLinus Torvalds } 26391da177e4SLinus Torvalds 26401da177e4SLinus Torvalds module_init(ipoib_init_module); 26411da177e4SLinus Torvalds module_exit(ipoib_cleanup_module); 2642