| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Hal Rosenstock | 15384 | 65.51% | 1 | 0.71% |
| Sean Hefty | 3532 | 15.04% | 37 | 26.43% |
| Parav Pandit | 700 | 2.98% | 20 | 14.29% |
| Dasaratharaman Chandramouli | 684 | 2.91% | 11 | 7.86% |
| Haggai Eran | 452 | 1.92% | 5 | 3.57% |
| Mark Bloch | 445 | 1.90% | 1 | 0.71% |
| Roland Dreier | 414 | 1.76% | 8 | 5.71% |
| Don Hiatt | 396 | 1.69% | 3 | 2.14% |
| Daniel Jurgens | 388 | 1.65% | 1 | 0.71% |
| Steve Wise | 253 | 1.08% | 1 | 0.71% |
| Erez Shitrit | 200 | 0.85% | 1 | 0.71% |
| Hans Westgaard Ry | 114 | 0.49% | 1 | 0.71% |
| Michael S. Tsirkin | 84 | 0.36% | 3 | 2.14% |
| Doron Tsur | 61 | 0.26% | 1 | 0.71% |
| Matan Barak | 58 | 0.25% | 6 | 4.29% |
| Greg Kroah-Hartman | 53 | 0.23% | 3 | 2.14% |
| Michael Wang | 51 | 0.22% | 2 | 1.43% |
| David Howells | 27 | 0.11% | 1 | 0.71% |
| Tejun Heo | 24 | 0.10% | 3 | 2.14% |
| Dotan Barak | 22 | 0.09% | 1 | 0.71% |
| Harvey Harrison | 19 | 0.08% | 1 | 0.71% |
| Leon Romanovsky | 13 | 0.06% | 2 | 1.43% |
| Bart Van Assche | 13 | 0.06% | 3 | 2.14% |
| John Kingman | 13 | 0.06% | 1 | 0.71% |
| Moni Shoua | 12 | 0.05% | 1 | 0.71% |
| Or Gerlitz | 8 | 0.03% | 1 | 0.71% |
| Jason Gunthorpe | 7 | 0.03% | 2 | 1.43% |
| Majd Dibbiny | 6 | 0.03% | 1 | 0.71% |
| Gal Pressman | 6 | 0.03% | 2 | 1.43% |
| Christoph Hellwig | 5 | 0.02% | 1 | 0.71% |
| Ira Weiny | 5 | 0.02% | 2 | 1.43% |
| Sagi Grimberg | 5 | 0.02% | 1 | 0.71% |
| Goldwyn Rodrigues | 4 | 0.02% | 1 | 0.71% |
| Kees Cook | 4 | 0.02% | 1 | 0.71% |
| Al Viro | 3 | 0.01% | 2 | 1.43% |
| Paul Gortmaker | 3 | 0.01% | 1 | 0.71% |
| Ted Kim | 3 | 0.01% | 1 | 0.71% |
| Jani Nikula | 3 | 0.01% | 1 | 0.71% |
| Eric Sesterhenn / Snakebyte | 3 | 0.01% | 1 | 0.71% |
| Zhao Hongjiang | 2 | 0.01% | 1 | 0.71% |
| Emese Revfy | 1 | 0.00% | 1 | 0.71% |
| Parag Warudkar | 1 | 0.00% | 1 | 0.71% |
| Håkon Bugge | 1 | 0.00% | 1 | 0.71% |
| Total | 23482 | 140 |
/* * Copyright (c) 2004-2007 Intel Corporation. All rights reserved. * Copyright (c) 2004 Topspin Corporation. All rights reserved. * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include <linux/completion.h> #include <linux/dma-mapping.h> #include <linux/device.h> #include <linux/module.h> #include <linux/err.h> #include <linux/idr.h> #include <linux/interrupt.h> #include <linux/random.h> #include <linux/rbtree.h> #include <linux/spinlock.h> #include <linux/slab.h> #include <linux/sysfs.h> #include <linux/workqueue.h> #include <linux/kdev_t.h> #include <linux/etherdevice.h> #include <rdma/ib_cache.h> #include <rdma/ib_cm.h> #include "cm_msgs.h" MODULE_AUTHOR("Sean Hefty"); MODULE_DESCRIPTION("InfiniBand CM"); MODULE_LICENSE("Dual BSD/GPL"); static const char * const ibcm_rej_reason_strs[] = { [IB_CM_REJ_NO_QP] = "no QP", [IB_CM_REJ_NO_EEC] = "no EEC", [IB_CM_REJ_NO_RESOURCES] = "no resources", [IB_CM_REJ_TIMEOUT] = "timeout", [IB_CM_REJ_UNSUPPORTED] = "unsupported", [IB_CM_REJ_INVALID_COMM_ID] = "invalid comm ID", [IB_CM_REJ_INVALID_COMM_INSTANCE] = "invalid comm instance", [IB_CM_REJ_INVALID_SERVICE_ID] = "invalid service ID", [IB_CM_REJ_INVALID_TRANSPORT_TYPE] = "invalid transport type", [IB_CM_REJ_STALE_CONN] = "stale conn", [IB_CM_REJ_RDC_NOT_EXIST] = "RDC not exist", [IB_CM_REJ_INVALID_GID] = "invalid GID", [IB_CM_REJ_INVALID_LID] = "invalid LID", [IB_CM_REJ_INVALID_SL] = "invalid SL", [IB_CM_REJ_INVALID_TRAFFIC_CLASS] = "invalid traffic class", [IB_CM_REJ_INVALID_HOP_LIMIT] = "invalid hop limit", [IB_CM_REJ_INVALID_PACKET_RATE] = "invalid packet rate", [IB_CM_REJ_INVALID_ALT_GID] = "invalid alt GID", [IB_CM_REJ_INVALID_ALT_LID] = "invalid alt LID", [IB_CM_REJ_INVALID_ALT_SL] = "invalid alt SL", [IB_CM_REJ_INVALID_ALT_TRAFFIC_CLASS] = "invalid alt traffic class", [IB_CM_REJ_INVALID_ALT_HOP_LIMIT] = "invalid alt hop limit", [IB_CM_REJ_INVALID_ALT_PACKET_RATE] = "invalid alt packet rate", [IB_CM_REJ_PORT_CM_REDIRECT] = "port CM redirect", [IB_CM_REJ_PORT_REDIRECT] = "port redirect", [IB_CM_REJ_INVALID_MTU] = "invalid MTU", [IB_CM_REJ_INSUFFICIENT_RESP_RESOURCES] = "insufficient resp resources", [IB_CM_REJ_CONSUMER_DEFINED] = "consumer defined", [IB_CM_REJ_INVALID_RNR_RETRY] = "invalid RNR retry", [IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID] = "duplicate local comm ID", [IB_CM_REJ_INVALID_CLASS_VERSION] = "invalid class version", [IB_CM_REJ_INVALID_FLOW_LABEL] = "invalid flow label", [IB_CM_REJ_INVALID_ALT_FLOW_LABEL] = "invalid alt flow label", }; const char *__attribute_const__ ibcm_reject_msg(int reason) { size_t index = reason; if (index < ARRAY_SIZE(ibcm_rej_reason_strs) && ibcm_rej_reason_strs[index]) return ibcm_rej_reason_strs[index]; else return "unrecognized reason"; } EXPORT_SYMBOL(ibcm_reject_msg); static void cm_add_one(struct ib_device *device); static void cm_remove_one(struct ib_device *device, void *client_data); static struct ib_client cm_client = { .name = "cm", .add = cm_add_one, .remove = cm_remove_one }; static struct ib_cm { spinlock_t lock; struct list_head device_list; rwlock_t device_lock; struct rb_root listen_service_table; u64 listen_service_id; /* struct rb_root peer_service_table; todo: fix peer to peer */ struct rb_root remote_qp_table; struct rb_root remote_id_table; struct rb_root remote_sidr_table; struct idr local_id_table; __be32 random_id_operand; struct list_head timewait_list; struct workqueue_struct *wq; /* Sync on cm change port state */ spinlock_t state_lock; } cm; /* Counter indexes ordered by attribute ID */ enum { CM_REQ_COUNTER, CM_MRA_COUNTER, CM_REJ_COUNTER, CM_REP_COUNTER, CM_RTU_COUNTER, CM_DREQ_COUNTER, CM_DREP_COUNTER, CM_SIDR_REQ_COUNTER, CM_SIDR_REP_COUNTER, CM_LAP_COUNTER, CM_APR_COUNTER, CM_ATTR_COUNT, CM_ATTR_ID_OFFSET = 0x0010, }; enum { CM_XMIT, CM_XMIT_RETRIES, CM_RECV, CM_RECV_DUPLICATES, CM_COUNTER_GROUPS }; static char const counter_group_names[CM_COUNTER_GROUPS] [sizeof("cm_rx_duplicates")] = { "cm_tx_msgs", "cm_tx_retries", "cm_rx_msgs", "cm_rx_duplicates" }; struct cm_counter_group { struct kobject obj; atomic_long_t counter[CM_ATTR_COUNT]; }; struct cm_counter_attribute { struct attribute attr; int index; }; #define CM_COUNTER_ATTR(_name, _index) \ struct cm_counter_attribute cm_##_name##_counter_attr = { \ .attr = { .name = __stringify(_name), .mode = 0444 }, \ .index = _index \ } static CM_COUNTER_ATTR(req, CM_REQ_COUNTER); static CM_COUNTER_ATTR(mra, CM_MRA_COUNTER); static CM_COUNTER_ATTR(rej, CM_REJ_COUNTER); static CM_COUNTER_ATTR(rep, CM_REP_COUNTER); static CM_COUNTER_ATTR(rtu, CM_RTU_COUNTER); static CM_COUNTER_ATTR(dreq, CM_DREQ_COUNTER); static CM_COUNTER_ATTR(drep, CM_DREP_COUNTER); static CM_COUNTER_ATTR(sidr_req, CM_SIDR_REQ_COUNTER); static CM_COUNTER_ATTR(sidr_rep, CM_SIDR_REP_COUNTER); static CM_COUNTER_ATTR(lap, CM_LAP_COUNTER); static CM_COUNTER_ATTR(apr, CM_APR_COUNTER); static struct attribute *cm_counter_default_attrs[] = { &cm_req_counter_attr.attr, &cm_mra_counter_attr.attr, &cm_rej_counter_attr.attr, &cm_rep_counter_attr.attr, &cm_rtu_counter_attr.attr, &cm_dreq_counter_attr.attr, &cm_drep_counter_attr.attr, &cm_sidr_req_counter_attr.attr, &cm_sidr_rep_counter_attr.attr, &cm_lap_counter_attr.attr, &cm_apr_counter_attr.attr, NULL }; struct cm_port { struct cm_device *cm_dev; struct ib_mad_agent *mad_agent; struct kobject port_obj; u8 port_num; struct list_head cm_priv_prim_list; struct list_head cm_priv_altr_list; struct cm_counter_group counter_group[CM_COUNTER_GROUPS]; }; struct cm_device { struct list_head list; struct ib_device *ib_device; struct device *device; u8 ack_delay; int going_down; struct cm_port *port[0]; }; struct cm_av { struct cm_port *port; union ib_gid dgid; struct rdma_ah_attr ah_attr; u16 pkey_index; u8 timeout; }; struct cm_work { struct delayed_work work; struct list_head list; struct cm_port *port; struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ __be32 local_id; /* Established / timewait */ __be32 remote_id; struct ib_cm_event cm_event; struct sa_path_rec path[0]; }; struct cm_timewait_info { struct cm_work work; /* Must be first. */ struct list_head list; struct rb_node remote_qp_node; struct rb_node remote_id_node; __be64 remote_ca_guid; __be32 remote_qpn; u8 inserted_remote_qp; u8 inserted_remote_id; }; struct cm_id_private { struct ib_cm_id id; struct rb_node service_node; struct rb_node sidr_id_node; spinlock_t lock; /* Do not acquire inside cm.lock */ struct completion comp; atomic_t refcount; /* Number of clients sharing this ib_cm_id. Only valid for listeners. * Protected by the cm.lock spinlock. */ int listen_sharecount; struct ib_mad_send_buf *msg; struct cm_timewait_info *timewait_info; /* todo: use alternate port on send failure */ struct cm_av av; struct cm_av alt_av; void *private_data; __be64 tid; __be32 local_qpn; __be32 remote_qpn; enum ib_qp_type qp_type; __be32 sq_psn; __be32 rq_psn; int timeout_ms; enum ib_mtu path_mtu; __be16 pkey; u8 private_data_len; u8 max_cm_retries; u8 peer_to_peer; u8 responder_resources; u8 initiator_depth; u8 retry_count; u8 rnr_retry_count; u8 service_timeout; u8 target_ack_delay; struct list_head prim_list; struct list_head altr_list; /* Indicates that the send port mad is registered and av is set */ int prim_send_port_not_ready; int altr_send_port_not_ready; struct list_head work_list; atomic_t work_count; }; static void cm_work_handler(struct work_struct *work); static inline void cm_deref_id(struct cm_id_private *cm_id_priv) { if (atomic_dec_and_test(&cm_id_priv->refcount)) complete(&cm_id_priv->comp); } static int cm_alloc_msg(struct cm_id_private *cm_id_priv, struct ib_mad_send_buf **msg) { struct ib_mad_agent *mad_agent; struct ib_mad_send_buf *m; struct ib_ah *ah; struct cm_av *av; unsigned long flags, flags2; int ret = 0; /* don't let the port to be released till the agent is down */ spin_lock_irqsave(&cm.state_lock, flags2); spin_lock_irqsave(&cm.lock, flags); if (!cm_id_priv->prim_send_port_not_ready) av = &cm_id_priv->av; else if (!cm_id_priv->altr_send_port_not_ready && (cm_id_priv->alt_av.port)) av = &cm_id_priv->alt_av; else { pr_info("%s: not valid CM id\n", __func__); ret = -ENODEV; spin_unlock_irqrestore(&cm.lock, flags); goto out; } spin_unlock_irqrestore(&cm.lock, flags); /* Make sure the port haven't released the mad yet */ mad_agent = cm_id_priv->av.port->mad_agent; if (!mad_agent) { pr_info("%s: not a valid MAD agent\n", __func__); ret = -ENODEV; goto out; } ah = rdma_create_ah(mad_agent->qp->pd, &av->ah_attr, 0); if (IS_ERR(ah)) { ret = PTR_ERR(ah); goto out; } m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, av->pkey_index, 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, GFP_ATOMIC, IB_MGMT_BASE_VERSION); if (IS_ERR(m)) { rdma_destroy_ah(ah, 0); ret = PTR_ERR(m); goto out; } /* Timeout set by caller if response is expected. */ m->ah = ah; m->retries = cm_id_priv->max_cm_retries; atomic_inc(&cm_id_priv->refcount); m->context[0] = cm_id_priv; *msg = m; out: spin_unlock_irqrestore(&cm.state_lock, flags2); return ret; } static struct ib_mad_send_buf *cm_alloc_response_msg_no_ah(struct cm_port *port, struct ib_mad_recv_wc *mad_recv_wc) { return ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, GFP_ATOMIC, IB_MGMT_BASE_VERSION); } static int cm_create_response_msg_ah(struct cm_port *port, struct ib_mad_recv_wc *mad_recv_wc, struct ib_mad_send_buf *msg) { struct ib_ah *ah; ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, mad_recv_wc->recv_buf.grh, port->port_num); if (IS_ERR(ah)) return PTR_ERR(ah); msg->ah = ah; return 0; } static void cm_free_msg(struct ib_mad_send_buf *msg) { if (msg->ah) rdma_destroy_ah(msg->ah, 0); if (msg->context[0]) cm_deref_id(msg->context[0]); ib_free_send_mad(msg); } static int cm_alloc_response_msg(struct cm_port *port, struct ib_mad_recv_wc *mad_recv_wc, struct ib_mad_send_buf **msg) { struct ib_mad_send_buf *m; int ret; m = cm_alloc_response_msg_no_ah(port, mad_recv_wc); if (IS_ERR(m)) return PTR_ERR(m); ret = cm_create_response_msg_ah(port, mad_recv_wc, m); if (ret) { cm_free_msg(m); return ret; } *msg = m; return 0; } static void * cm_copy_private_data(const void *private_data, u8 private_data_len) { void *data; if (!private_data || !private_data_len) return NULL; data = kmemdup(private_data, private_data_len, GFP_KERNEL); if (!data) return ERR_PTR(-ENOMEM); return data; } static void cm_set_private_data(struct cm_id_private *cm_id_priv, void *private_data, u8 private_data_len) { if (cm_id_priv->private_data && cm_id_priv->private_data_len) kfree(cm_id_priv->private_data); cm_id_priv->private_data = private_data; cm_id_priv->private_data_len = private_data_len; } static int cm_init_av_for_lap(struct cm_port *port, struct ib_wc *wc, struct ib_grh *grh, struct cm_av *av) { struct rdma_ah_attr new_ah_attr; int ret; av->port = port; av->pkey_index = wc->pkey_index; /* * av->ah_attr might be initialized based on past wc during incoming * connect request or while sending out connect request. So initialize * a new ah_attr on stack. If initialization fails, old ah_attr is * used for sending any responses. If initialization is successful, * than new ah_attr is used by overwriting old one. */ ret = ib_init_ah_attr_from_wc(port->cm_dev->ib_device, port->port_num, wc, grh, &new_ah_attr); if (ret) return ret; rdma_move_ah_attr(&av->ah_attr, &new_ah_attr); return 0; } static int cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, struct ib_grh *grh, struct cm_av *av) { av->port = port; av->pkey_index = wc->pkey_index; return ib_init_ah_attr_from_wc(port->cm_dev->ib_device, port->port_num, wc, grh, &av->ah_attr); } static int add_cm_id_to_port_list(struct cm_id_private *cm_id_priv, struct cm_av *av, struct cm_port *port) { unsigned long flags; int ret = 0; spin_lock_irqsave(&cm.lock, flags); if (&cm_id_priv->av == av) list_add_tail(&cm_id_priv->prim_list, &port->cm_priv_prim_list); else if (&cm_id_priv->alt_av == av) list_add_tail(&cm_id_priv->altr_list, &port->cm_priv_altr_list); else ret = -EINVAL; spin_unlock_irqrestore(&cm.lock, flags); return ret; } static struct cm_port * get_cm_port_from_path(struct sa_path_rec *path, const struct ib_gid_attr *attr) { struct cm_device *cm_dev; struct cm_port *port = NULL; unsigned long flags; if (attr) { read_lock_irqsave(&cm.device_lock, flags); list_for_each_entry(cm_dev, &cm.device_list, list) { if (cm_dev->ib_device == attr->device) { port = cm_dev->port[attr->port_num - 1]; break; } } read_unlock_irqrestore(&cm.device_lock, flags); } else { /* SGID attribute can be NULL in following * conditions. * (a) Alternative path * (b) IB link layer without GRH * (c) LAP send messages */ read_lock_irqsave(&cm.device_lock, flags); list_for_each_entry(cm_dev, &cm.device_list, list) { attr = rdma_find_gid(cm_dev->ib_device, &path->sgid, sa_conv_pathrec_to_gid_type(path), NULL); if (!IS_ERR(attr)) { port = cm_dev->port[attr->port_num - 1]; break; } } read_unlock_irqrestore(&cm.device_lock, flags); if (port) rdma_put_gid_attr(attr); } return port; } static int cm_init_av_by_path(struct sa_path_rec *path, const struct ib_gid_attr *sgid_attr, struct cm_av *av, struct cm_id_private *cm_id_priv) { struct rdma_ah_attr new_ah_attr; struct cm_device *cm_dev; struct cm_port *port; int ret; port = get_cm_port_from_path(path, sgid_attr); if (!port) return -EINVAL; cm_dev = port->cm_dev; ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num, be16_to_cpu(path->pkey), &av->pkey_index); if (ret) return ret; av->port = port; /* * av->ah_attr might be initialized based on wc or during * request processing time which might have reference to sgid_attr. * So initialize a new ah_attr on stack. * If initialization fails, old ah_attr is used for sending any * responses. If initialization is successful, than new ah_attr * is used by overwriting the old one. So that right ah_attr * can be used to return an error response. */ ret = ib_init_ah_attr_from_path(cm_dev->ib_device, port->port_num, path, &new_ah_attr, sgid_attr); if (ret) return ret; av->timeout = path->packet_life_time + 1; ret = add_cm_id_to_port_list(cm_id_priv, av, port); if (ret) { rdma_destroy_ah_attr(&new_ah_attr); return ret; } rdma_move_ah_attr(&av->ah_attr, &new_ah_attr); return 0; } static int cm_alloc_id(struct cm_id_private *cm_id_priv) { unsigned long flags; int id; idr_preload(GFP_KERNEL); spin_lock_irqsave(&cm.lock, flags); id = idr_alloc_cyclic(&cm.local_id_table, cm_id_priv, 0, 0, GFP_NOWAIT); spin_unlock_irqrestore(&cm.lock, flags); idr_preload_end(); cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand; return id < 0 ? id : 0; } static void cm_free_id(__be32 local_id) { spin_lock_irq(&cm.lock); idr_remove(&cm.local_id_table, (__force int) (local_id ^ cm.random_id_operand)); spin_unlock_irq(&cm.lock); } static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id) { struct cm_id_private *cm_id_priv; cm_id_priv = idr_find(&cm.local_id_table, (__force int) (local_id ^ cm.random_id_operand)); if (cm_id_priv) { if (cm_id_priv->id.remote_id == remote_id) atomic_inc(&cm_id_priv->refcount); else cm_id_priv = NULL; } return cm_id_priv; } static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id) { struct cm_id_private *cm_id_priv; spin_lock_irq(&cm.lock); cm_id_priv = cm_get_id(local_id, remote_id); spin_unlock_irq(&cm.lock); return cm_id_priv; } /* * Trivial helpers to strip endian annotation and compare; the * endianness doesn't actually matter since we just need a stable * order for the RB tree. */ static int be32_lt(__be32 a, __be32 b) { return (__force u32) a < (__force u32) b; } static int be32_gt(__be32 a, __be32 b) { return (__force u32) a > (__force u32) b; } static int be64_lt(__be64 a, __be64 b) { return (__force u64) a < (__force u64) b; } static int be64_gt(__be64 a, __be64 b) { return (__force u64) a > (__force u64) b; } static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) { struct rb_node **link = &cm.listen_service_table.rb_node; struct rb_node *parent = NULL; struct cm_id_private *cur_cm_id_priv; __be64 service_id = cm_id_priv->id.service_id; __be64 service_mask = cm_id_priv->id.service_mask; while (*link) { parent = *link; cur_cm_id_priv = rb_entry(parent, struct cm_id_private, service_node); if ((cur_cm_id_priv->id.service_mask & service_id) == (service_mask & cur_cm_id_priv->id.service_id) && (cm_id_priv->id.device == cur_cm_id_priv->id.device)) return cur_cm_id_priv; if (cm_id_priv->id.device < cur_cm_id_priv->id.device) link = &(*link)->rb_left; else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) link = &(*link)->rb_right; else if (be64_lt(service_id, cur_cm_id_priv->id.service_id)) link = &(*link)->rb_left; else if (be64_gt(service_id, cur_cm_id_priv->id.service_id)) link = &(*link)->rb_right; else link = &(*link)->rb_right; } rb_link_node(&cm_id_priv->service_node, parent, link); rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); return NULL; } static struct cm_id_private * cm_find_listen(struct ib_device *device, __be64 service_id) { struct rb_node *node = cm.listen_service_table.rb_node; struct cm_id_private *cm_id_priv; while (node) { cm_id_priv = rb_entry(node, struct cm_id_private, service_node); if ((cm_id_priv->id.service_mask & service_id) == cm_id_priv->id.service_id && (cm_id_priv->id.device == device)) return cm_id_priv; if (device < cm_id_priv->id.device) node = node->rb_left; else if (device > cm_id_priv->id.device) node = node->rb_right; else if (be64_lt(service_id, cm_id_priv->id.service_id)) node = node->rb_left; else if (be64_gt(service_id, cm_id_priv->id.service_id)) node = node->rb_right; else node = node->rb_right; } return NULL; } static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info *timewait_info) { struct rb_node **link = &cm.remote_id_table.rb_node; struct rb_node *parent = NULL; struct cm_timewait_info *cur_timewait_info; __be64 remote_ca_guid = timewait_info->remote_ca_guid; __be32 remote_id = timewait_info->work.remote_id; while (*link) { parent = *link; cur_timewait_info = rb_entry(parent, struct cm_timewait_info, remote_id_node); if (be32_lt(remote_id, cur_timewait_info->work.remote_id)) link = &(*link)->rb_left; else if (be32_gt(remote_id, cur_timewait_info->work.remote_id)) link = &(*link)->rb_right; else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) link = &(*link)->rb_left; else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) link = &(*link)->rb_right; else return cur_timewait_info; } timewait_info->inserted_remote_id = 1; rb_link_node(&timewait_info->remote_id_node, parent, link); rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); return NULL; } static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid, __be32 remote_id) { struct rb_node *node = cm.remote_id_table.rb_node; struct cm_timewait_info *timewait_info; while (node) { timewait_info = rb_entry(node, struct cm_timewait_info, remote_id_node); if (be32_lt(remote_id, timewait_info->work.remote_id)) node = node->rb_left; else if (be32_gt(remote_id, timewait_info->work.remote_id)) node = node->rb_right; else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid)) node = node->rb_left; else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid)) node = node->rb_right; else return timewait_info; } return NULL; } static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info *timewait_info) { struct rb_node **link = &cm.remote_qp_table.rb_node; struct rb_node *parent = NULL; struct cm_timewait_info *cur_timewait_info; __be64 remote_ca_guid = timewait_info->remote_ca_guid; __be32 remote_qpn = timewait_info->remote_qpn; while (*link) { parent = *link; cur_timewait_info = rb_entry(parent, struct cm_timewait_info, remote_qp_node); if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn)) link = &(*link)->rb_left; else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn)) link = &(*link)->rb_right; else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) link = &(*link)->rb_left; else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) link = &(*link)->rb_right; else return cur_timewait_info; } timewait_info->inserted_remote_qp = 1; rb_link_node(&timewait_info->remote_qp_node, parent, link); rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); return NULL; } static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private *cm_id_priv) { struct rb_node **link = &cm.remote_sidr_table.rb_node; struct rb_node *parent = NULL; struct cm_id_private *cur_cm_id_priv; union ib_gid *port_gid = &cm_id_priv->av.dgid; __be32 remote_id = cm_id_priv->id.remote_id; while (*link) { parent = *link; cur_cm_id_priv = rb_entry(parent, struct cm_id_private, sidr_id_node); if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id)) link = &(*link)->rb_left; else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id)) link = &(*link)->rb_right; else { int cmp; cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid, sizeof *port_gid); if (cmp < 0) link = &(*link)->rb_left; else if (cmp > 0) link = &(*link)->rb_right; else return cur_cm_id_priv; } } rb_link_node(&cm_id_priv->sidr_id_node, parent, link); rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); return NULL; } static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv, enum ib_cm_sidr_status status) { struct ib_cm_sidr_rep_param param; memset(¶m, 0, sizeof param); param.status = status; ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); } struct ib_cm_id *ib_create_cm_id(struct ib_device *device, ib_cm_handler cm_handler, void *context) { struct cm_id_private *cm_id_priv; int ret; cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); if (!cm_id_priv) return ERR_PTR(-ENOMEM); cm_id_priv->id.state = IB_CM_IDLE; cm_id_priv->id.device = device; cm_id_priv->id.cm_handler = cm_handler; cm_id_priv->id.context = context; cm_id_priv->id.remote_cm_qpn = 1; ret = cm_alloc_id(cm_id_priv); if (ret) goto error; spin_lock_init(&cm_id_priv->lock); init_completion(&cm_id_priv->comp); INIT_LIST_HEAD(&cm_id_priv->work_list); INIT_LIST_HEAD(&cm_id_priv->prim_list); INIT_LIST_HEAD(&cm_id_priv->altr_list); atomic_set(&cm_id_priv->work_count, -1); atomic_set(&cm_id_priv->refcount, 1); return &cm_id_priv->id; error: kfree(cm_id_priv); return ERR_PTR(-ENOMEM); } EXPORT_SYMBOL(ib_create_cm_id); static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv) { struct cm_work *work; if (list_empty(&cm_id_priv->work_list)) return NULL; work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); list_del(&work->list); return work; } static void cm_free_work(struct cm_work *work) { if (work->mad_recv_wc) ib_free_recv_mad(work->mad_recv_wc); kfree(work); } static inline int cm_convert_to_ms(int iba_time) { /* approximate conversion to ms from 4.096us x 2^iba_time */ return 1 << max(iba_time - 8, 0); } /* * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time * Because of how ack_timeout is stored, adding one doubles the timeout. * To avoid large timeouts, select the max(ack_delay, life_time + 1), and * increment it (round up) only if the other is within 50%. */ static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time) { int ack_timeout = packet_life_time + 1; if (ack_timeout >= ca_ack_delay) ack_timeout += (ca_ack_delay >= (ack_timeout - 1)); else ack_timeout = ca_ack_delay + (ack_timeout >= (ca_ack_delay - 1)); return min(31, ack_timeout); } static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info) { if (timewait_info->inserted_remote_id) { rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); timewait_info->inserted_remote_id = 0; } if (timewait_info->inserted_remote_qp) { rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); timewait_info->inserted_remote_qp = 0; } } static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id) { struct cm_timewait_info *timewait_info; timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); if (!timewait_info) return ERR_PTR(-ENOMEM); timewait_info->work.local_id = local_id; INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler); timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; return timewait_info; } static void cm_enter_timewait(struct cm_id_private *cm_id_priv) { int wait_time; unsigned long flags; struct cm_device *cm_dev; cm_dev = ib_get_client_data(cm_id_priv->id.device, &cm_client); if (!cm_dev) return; spin_lock_irqsave(&cm.lock, flags); cm_cleanup_timewait(cm_id_priv->timewait_info); list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); spin_unlock_irqrestore(&cm.lock, flags); /* * The cm_id could be destroyed by the user before we exit timewait. * To protect against this, we search for the cm_id after exiting * timewait before notifying the user that we've exited timewait. */ cm_id_priv->id.state = IB_CM_TIMEWAIT; wait_time = cm_convert_to_ms(cm_id_priv->av.timeout); /* Check if the device started its remove_one */ spin_lock_irqsave(&cm.lock, flags); if (!cm_dev->going_down) queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, msecs_to_jiffies(wait_time)); spin_unlock_irqrestore(&cm.lock, flags); cm_id_priv->timewait_info = NULL; } static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) { unsigned long flags; cm_id_priv->id.state = IB_CM_IDLE; if (cm_id_priv->timewait_info) { spin_lock_irqsave(&cm.lock, flags); cm_cleanup_timewait(cm_id_priv->timewait_info); spin_unlock_irqrestore(&cm.lock, flags); kfree(cm_id_priv->timewait_info); cm_id_priv->timewait_info = NULL; } } static void cm_destroy_id(struct ib_cm_id *cm_id, int err) { struct cm_id_private *cm_id_priv; struct cm_work *work; cm_id_priv = container_of(cm_id, struct cm_id_private, id); retest: spin_lock_irq(&cm_id_priv->lock); switch (cm_id->state) { case IB_CM_LISTEN: spin_unlock_irq(&cm_id_priv->lock); spin_lock_irq(&cm.lock); if (--cm_id_priv->listen_sharecount > 0) { /* The id is still shared. */ cm_deref_id(cm_id_priv); spin_unlock_irq(&cm.lock); return; } rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); spin_unlock_irq(&cm.lock); break; case IB_CM_SIDR_REQ_SENT: cm_id->state = IB_CM_IDLE; ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); spin_unlock_irq(&cm_id_priv->lock); break; case IB_CM_SIDR_REQ_RCVD: spin_unlock_irq(&cm_id_priv->lock); cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT); spin_lock_irq(&cm.lock); if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node)) rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); spin_unlock_irq(&cm.lock); break; case IB_CM_REQ_SENT: case IB_CM_MRA_REQ_RCVD: ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); spin_unlock_irq(&cm_id_priv->lock); ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT, &cm_id_priv->id.device->node_guid, sizeof cm_id_priv->id.device->node_guid, NULL, 0); break; case IB_CM_REQ_RCVD: if (err == -ENOMEM) { /* Do not reject to allow future retries. */ cm_reset_to_idle(cm_id_priv); spin_unlock_irq(&cm_id_priv->lock); } else { spin_unlock_irq(&cm_id_priv->lock); ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, NULL, 0, NULL, 0); } break; case IB_CM_REP_SENT: case IB_CM_MRA_REP_RCVD: ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); /* Fall through */ case IB_CM_MRA_REQ_SENT: case IB_CM_REP_RCVD: case IB_CM_MRA_REP_SENT: spin_unlock_irq(&cm_id_priv->lock); ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, NULL, 0, NULL, 0); break; case IB_CM_ESTABLISHED: spin_unlock_irq(&cm_id_priv->lock); if (cm_id_priv->qp_type == IB_QPT_XRC_TGT) break; ib_send_cm_dreq(cm_id, NULL, 0); goto retest; case IB_CM_DREQ_SENT: ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); cm_enter_timewait(cm_id_priv); spin_unlock_irq(&cm_id_priv->lock); break; case IB_CM_DREQ_RCVD: spin_unlock_irq(&cm_id_priv->lock); ib_send_cm_drep(cm_id, NULL, 0); break; default: spin_unlock_irq(&cm_id_priv->lock); break; } spin_lock_irq(&cm.lock); if (!list_empty(&cm_id_priv->altr_list) && (!cm_id_priv->altr_send_port_not_ready)) list_del(&cm_id_priv->altr_list); if (!list_empty(&cm_id_priv->prim_list) && (!cm_id_priv->prim_send_port_not_ready)) list_del(&cm_id_priv->prim_list); spin_unlock_irq(&cm.lock); cm_free_id(cm_id->local_id); cm_deref_id(cm_id_priv); wait_for_completion(&cm_id_priv->comp); while ((work = cm_dequeue_work(cm_id_priv)) != NULL) cm_free_work(work); rdma_destroy_ah_attr(&cm_id_priv->av.ah_attr); rdma_destroy_ah_attr(&cm_id_priv->alt_av.ah_attr); kfree(cm_id_priv->private_data); kfree(cm_id_priv); } void ib_destroy_cm_id(struct ib_cm_id *cm_id) { cm_destroy_id(cm_id, 0); } EXPORT_SYMBOL(ib_destroy_cm_id); /** * __ib_cm_listen - Initiates listening on the specified service ID for * connection and service ID resolution requests. * @cm_id: Connection identifier associated with the listen request. * @service_id: Service identifier matched against incoming connection * and service ID resolution requests. The service ID should be specified * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will * assign a service ID to the caller. * @service_mask: Mask applied to service ID used to listen across a * range of service IDs. If set to 0, the service ID is matched * exactly. This parameter is ignored if %service_id is set to * IB_CM_ASSIGN_SERVICE_ID. */ static int __ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask) { struct cm_id_private *cm_id_priv, *cur_cm_id_priv; int ret = 0; service_mask = service_mask ? service_mask : ~cpu_to_be64(0); service_id &= service_mask; if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && (service_id != IB_CM_ASSIGN_SERVICE_ID)) return -EINVAL; cm_id_priv = container_of(cm_id, struct cm_id_private, id); if (cm_id->state != IB_CM_IDLE) return -EINVAL; cm_id->state = IB_CM_LISTEN; ++cm_id_priv->listen_sharecount; if (service_id == IB_CM_ASSIGN_SERVICE_ID) { cm_id->service_id = cpu_to_be64(cm.listen_service_id++); cm_id->service_mask = ~cpu_to_be64(0); } else { cm_id->service_id = service_id; cm_id->service_mask = service_mask; } cur_cm_id_priv = cm_insert_listen(cm_id_priv); if (cur_cm_id_priv) { cm_id->state = IB_CM_IDLE; --cm_id_priv->listen_sharecount; ret = -EBUSY; } return ret; } int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask) { unsigned long flags; int ret; spin_lock_irqsave(&cm.lock, flags); ret = __ib_cm_listen(cm_id, service_id, service_mask); spin_unlock_irqrestore(&cm.lock, flags); return ret; } EXPORT_SYMBOL(ib_cm_listen); /** * Create a new listening ib_cm_id and listen on the given service ID. * * If there's an existing ID listening on that same device and service ID, * return it. * * @device: Device associated with the cm_id. All related communication will * be associated with the specified device. * @cm_handler: Callback invoked to notify the user of CM events. * @service_id: Service identifier matched against incoming connection * and service ID resolution requests. The service ID should be specified * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will * assign a service ID to the caller. * * Callers should call ib_destroy_cm_id when done with the listener ID. */ struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device, ib_cm_handler cm_handler, __be64 service_id) { struct cm_id_private *cm_id_priv; struct ib_cm_id *cm_id; unsigned long flags; int err = 0; /* Create an ID in advance, since the creation may sleep */ cm_id = ib_create_cm_id(device, cm_handler, NULL); if (IS_ERR(cm_id)) return cm_id; spin_lock_irqsave(&cm.lock, flags); if (service_id == IB_CM_ASSIGN_SERVICE_ID) goto new_id; /* Find an existing ID */ cm_id_priv = cm_find_listen(device, service_id); if (cm_id_priv) { if (cm_id->cm_handler != cm_handler || cm_id->context) { /* Sharing an ib_cm_id with different handlers is not * supported */ spin_unlock_irqrestore(&cm.lock, flags); return ERR_PTR(-EINVAL); } atomic_inc(&cm_id_priv->refcount); ++cm_id_priv->listen_sharecount; spin_unlock_irqrestore(&cm.lock, flags); ib_destroy_cm_id(cm_id); cm_id = &cm_id_priv->id; return cm_id; } new_id: /* Use newly created ID */ err = __ib_cm_listen(cm_id, service_id, 0); spin_unlock_irqrestore(&cm.lock, flags); if (err) { ib_destroy_cm_id(cm_id); return ERR_PTR(err); } return cm_id; } EXPORT_SYMBOL(ib_cm_insert_listen); static __be64 cm_form_tid(struct cm_id_private *cm_id_priv) { u64 hi_tid, low_tid; hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; low_tid = (u64)cm_id_priv->id.local_id; return cpu_to_be64(hi_tid | low_tid); } static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, __be16 attr_id, __be64 tid) { hdr->base_version = IB_MGMT_BASE_VERSION; hdr->mgmt_class = IB_MGMT_CLASS_CM; hdr->class_version = IB_CM_CLASS_VERSION; hdr->method = IB_MGMT_METHOD_SEND; hdr->attr_id = attr_id; hdr->tid = tid; } static void cm_format_req(struct cm_req_msg *req_msg, struct cm_id_private *cm_id_priv, struct ib_cm_req_param *param) { struct sa_path_rec *pri_path = param->primary_path; struct sa_path_rec *alt_path = param->alternate_path; bool pri_ext = false; if (pri_path->rec_type == SA_PATH_REC_TYPE_OPA) pri_ext = opa_is_extended_lid(pri_path->opa.dlid, pri_path->opa.slid); cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, cm_form_tid(cm_id_priv)); req_msg->local_comm_id = cm_id_priv->id.local_id; req_msg->service_id = param->service_id; req_msg->local_ca_guid = cm_id_priv->id.device->node_guid; cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num)); cm_req_set_init_depth(req_msg, param->initiator_depth); cm_req_set_remote_resp_timeout(req_msg, param->remote_cm_response_timeout); cm_req_set_qp_type(req_msg, param->qp_type); cm_req_set_flow_ctrl(req_msg, param->flow_control); cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn)); cm_req_set_local_resp_timeout(req_msg, param->local_cm_response_timeout); req_msg->pkey = param->primary_path->pkey; cm_req_set_path_mtu(req_msg, param->primary_path->mtu); cm_req_set_max_cm_retries(req_msg, param->max_cm_retries); if (param->qp_type != IB_QPT_XRC_INI) { cm_req_set_resp_res(req_msg, param->responder_resources); cm_req_set_retry_count(req_msg, param->retry_count); cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count); cm_req_set_srq(req_msg, param->srq); } req_msg->primary_local_gid = pri_path->sgid; req_msg->primary_remote_gid = pri_path->dgid; if (pri_ext) { req_msg->primary_local_gid.global.interface_id = OPA_MAKE_ID(be32_to_cpu(pri_path->opa.slid)); req_msg->primary_remote_gid.global.interface_id = OPA_MAKE_ID(be32_to_cpu(pri_path->opa.dlid)); } if (pri_path->hop_limit <= 1) { req_msg->primary_local_lid = pri_ext ? 0 : htons(ntohl(sa_path_get_slid(pri_path))); req_msg->primary_remote_lid = pri_ext ? 0 : htons(ntohl(sa_path_get_dlid(pri_path))); } else { /* Work-around until there's a way to obtain remote LID info */ req_msg->primary_local_lid = IB_LID_PERMISSIVE; req_msg->primary_remote_lid = IB_LID_PERMISSIVE; } cm_req_set_primary_flow_label(req_msg, pri_path->flow_label); cm_req_set_primary_packet_rate(req_msg, pri_path->rate); req_msg->primary_traffic_class = pri_path->traffic_class; req_msg->primary_hop_limit = pri_path->hop_limit; cm_req_set_primary_sl(req_msg, pri_path->sl); cm_req_set_primary_subnet_local(req_msg, (pri_path->hop_limit <= 1)); cm_req_set_primary_local_ack_timeout(req_msg, cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, pri_path->packet_life_time)); if (alt_path) { bool alt_ext = false; if (alt_path->rec_type == SA_PATH_REC_TYPE_OPA) alt_ext = opa_is_extended_lid(alt_path->opa.dlid, alt_path->opa.slid); req_msg->alt_local_gid = alt_path->sgid; req_msg->alt_remote_gid = alt_path->dgid; if (alt_ext) { req_msg->alt_local_gid.global.interface_id = OPA_MAKE_ID(be32_to_cpu(alt_path->opa.slid)); req_msg->alt_remote_gid.global.interface_id = OPA_MAKE_ID(be32_to_cpu(alt_path->opa.dlid)); } if (alt_path->hop_limit <= 1) { req_msg->alt_local_lid = alt_ext ? 0 : htons(ntohl(sa_path_get_slid(alt_path))); req_msg->alt_remote_lid = alt_ext ? 0 : htons(ntohl(sa_path_get_dlid(alt_path))); } else { req_msg->alt_local_lid = IB_LID_PERMISSIVE; req_msg->alt_remote_lid = IB_LID_PERMISSIVE; } cm_req_set_alt_flow_label(req_msg, alt_path->flow_label); cm_req_set_alt_packet_rate(req_msg, alt_path->rate); req_msg->alt_traffic_class = alt_path->traffic_class; req_msg->alt_hop_limit = alt_path->hop_limit; cm_req_set_alt_sl(req_msg, alt_path->sl); cm_req_set_alt_subnet_local(req_msg, (alt_path->hop_limit <= 1)); cm_req_set_alt_local_ack_timeout(req_msg, cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, alt_path->packet_life_time)); } if (param->private_data && param->private_data_len) memcpy(req_msg->private_data, param->private_data, param->private_data_len); } static int cm_validate_req_param(struct ib_cm_req_param *param) { /* peer-to-peer not supported */ if (param->peer_to_peer) return -EINVAL; if (!param->primary_path) return -EINVAL; if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC && param->qp_type != IB_QPT_XRC_INI) return -EINVAL; if (param->private_data && param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) return -EINVAL; if (param->alternate_path && (param->alternate_path->pkey != param->primary_path->pkey || param->alternate_path->mtu != param->primary_path->mtu)) return -EINVAL; return 0; } int ib_send_cm_req(struct ib_cm_id *cm_id, struct ib_cm_req_param *param) { struct cm_id_private *cm_id_priv; struct cm_req_msg *req_msg; unsigned long flags; int ret; ret = cm_validate_req_param(param); if (ret) return ret; /* Verify that we're not in timewait. */ cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); if (cm_id->state != IB_CM_IDLE) { spin_unlock_irqrestore(&cm_id_priv->lock, flags); ret = -EINVAL; goto out; } spin_unlock_irqrestore(&cm_id_priv->lock, flags); cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> id.local_id); if (IS_ERR(cm_id_priv->timewait_info)) { ret = PTR_ERR(cm_id_priv->timewait_info); goto out; } ret = cm_init_av_by_path(param->primary_path, param->ppath_sgid_attr, &cm_id_priv->av, cm_id_priv); if (ret) goto error1; if (param->alternate_path) { ret = cm_init_av_by_path(param->alternate_path, NULL, &cm_id_priv->alt_av, cm_id_priv); if (ret) goto error1; } cm_id->service_id = param->service_id; cm_id->service_mask = ~cpu_to_be64(0); cm_id_priv->timeout_ms = cm_convert_to_ms( param->primary_path->packet_life_time) * 2 + cm_convert_to_ms( param->remote_cm_response_timeout); cm_id_priv->max_cm_retries = param->max_cm_retries; cm_id_priv->initiator_depth = param->initiator_depth; cm_id_priv->responder_resources = param->responder_resources; cm_id_priv->retry_count = param->retry_count; cm_id_priv->path_mtu = param->primary_path->mtu; cm_id_priv->pkey = param->primary_path->pkey; cm_id_priv->qp_type = param->qp_type; ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg); if (ret) goto error1; req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad; cm_format_req(req_msg, cm_id_priv, param); cm_id_priv->tid = req_msg->hdr.tid; cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms; cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT; cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg); cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg); spin_lock_irqsave(&cm_id_priv->lock, flags); ret = ib_post_send_mad(cm_id_priv->msg, NULL); if (ret) { spin_unlock_irqrestore(&cm_id_priv->lock, flags); goto error2; } BUG_ON(cm_id->state != IB_CM_IDLE); cm_id->state = IB_CM_REQ_SENT; spin_unlock_irqrestore(&cm_id_priv->lock, flags); return 0; error2: cm_free_msg(cm_id_priv->msg); error1: kfree(cm_id_priv->timewait_info); out: return ret; } EXPORT_SYMBOL(ib_send_cm_req); static int cm_issue_rej(struct cm_port *port, struct ib_mad_recv_wc *mad_recv_wc, enum ib_cm_rej_reason reason, enum cm_msg_response msg_rejected, void *ari, u8 ari_length) { struct ib_mad_send_buf *msg = NULL; struct cm_rej_msg *rej_msg, *rcv_msg; int ret; ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); if (ret) return ret; /* We just need common CM header information. Cast to any message. */ rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; rej_msg = (struct cm_rej_msg *) msg->mad; cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); rej_msg->remote_comm_id = rcv_msg->local_comm_id; rej_msg->local_comm_id = rcv_msg->remote_comm_id; cm_rej_set_msg_rejected(rej_msg, msg_rejected); rej_msg->reason = cpu_to_be16(reason); if (ari && ari_length) { cm_rej_set_reject_info_len(rej_msg, ari_length); memcpy(rej_msg->ari, ari, ari_length); } ret = ib_post_send_mad(msg, NULL); if (ret) cm_free_msg(msg); return ret; } static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid, __be32 local_qpn, __be32 remote_qpn) { return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) || ((local_ca_guid == remote_ca_guid) && (be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn)))); } static bool cm_req_has_alt_path(struct cm_req_msg *req_msg) { return ((req_msg->alt_local_lid) || (ib_is_opa_gid(&req_msg->alt_local_gid))); } static void cm_path_set_rec_type(struct ib_device *ib_device, u8 port_num, struct sa_path_rec *path, union ib_gid *gid) { if (ib_is_opa_gid(gid) && rdma_cap_opa_ah(ib_device, port_num)) path->rec_type = SA_PATH_REC_TYPE_OPA; else path->rec_type = SA_PATH_REC_TYPE_IB; } static void cm_format_path_lid_from_req(struct cm_req_msg *req_msg, struct sa_path_rec *primary_path, struct sa_path_rec *alt_path) { u32 lid; if (primary_path->rec_type != SA_PATH_REC_TYPE_OPA) { sa_path_set_dlid(primary_path, ntohs(req_msg->primary_local_lid)); sa_path_set_slid(primary_path, ntohs(req_msg->primary_remote_lid)); } else { lid = opa_get_lid_from_gid(&req_msg->primary_local_gid); sa_path_set_dlid(primary_path, lid); lid = opa_get_lid_from_gid(&req_msg->primary_remote_gid); sa_path_set_slid(primary_path, lid); } if (!cm_req_has_alt_path(req_msg)) return; if (alt_path->rec_type != SA_PATH_REC_TYPE_OPA) { sa_path_set_dlid(alt_path, ntohs(req_msg->alt_local_lid)); sa_path_set_slid(alt_path, ntohs(req_msg->alt_remote_lid)); } else { lid = opa_get_lid_from_gid(&req_msg->alt_local_gid); sa_path_set_dlid(alt_path, lid); lid = opa_get_lid_from_gid(&req_msg->alt_remote_gid); sa_path_set_slid(alt_path, lid); } } static void cm_format_paths_from_req(struct cm_req_msg *req_msg, struct sa_path_rec *primary_path, struct sa_path_rec *alt_path) { primary_path->dgid = req_msg->primary_local_gid; primary_path->sgid = req_msg->primary_remote_gid; primary_path->flow_label = cm_req_get_primary_flow_label(req_msg); primary_path->hop_limit = req_msg->primary_hop_limit; primary_path->traffic_class = req_msg->primary_traffic_class; primary_path->reversible = 1; primary_path->pkey = req_msg->pkey; primary_path->sl = cm_req_get_primary_sl(req_msg); primary_path->mtu_selector = IB_SA_EQ; primary_path->mtu = cm_req_get_path_mtu(req_msg); primary_path->rate_selector = IB_SA_EQ; primary_path->rate = cm_req_get_primary_packet_rate(req_msg); primary_path->packet_life_time_selector = IB_SA_EQ; primary_path->packet_life_time = cm_req_get_primary_local_ack_timeout(req_msg); primary_path->packet_life_time -= (primary_path->packet_life_time > 0); primary_path->service_id = req_msg->service_id; if (sa_path_is_roce(primary_path)) primary_path->roce.route_resolved = false; if (cm_req_has_alt_path(req_msg)) { alt_path->dgid = req_msg->alt_local_gid; alt_path->sgid = req_msg->alt_remote_gid; alt_path->flow_label = cm_req_get_alt_flow_label(req_msg); alt_path->hop_limit = req_msg->alt_hop_limit; alt_path->traffic_class = req_msg->alt_traffic_class; alt_path->reversible = 1; alt_path->pkey = req_msg->pkey; alt_path->sl = cm_req_get_alt_sl(req_msg); alt_path->mtu_selector = IB_SA_EQ; alt_path->mtu = cm_req_get_path_mtu(req_msg); alt_path->rate_selector = IB_SA_EQ; alt_path->rate = cm_req_get_alt_packet_rate(req_msg); alt_path->packet_life_time_selector = IB_SA_EQ; alt_path->packet_life_time = cm_req_get_alt_local_ack_timeout(req_msg); alt_path->packet_life_time -= (alt_path->packet_life_time > 0); alt_path->service_id = req_msg->service_id; if (sa_path_is_roce(alt_path)) alt_path->roce.route_resolved = false; } cm_format_path_lid_from_req(req_msg, primary_path, alt_path); } static u16 cm_get_bth_pkey(struct cm_work *work) { struct ib_device *ib_dev = work->port->cm_dev->ib_device; u8 port_num = work->port->port_num; u16 pkey_index = work->mad_recv_wc->wc->pkey_index; u16 pkey; int ret; ret = ib_get_cached_pkey(ib_dev, port_num, pkey_index, &pkey); if (ret) { dev_warn_ratelimited(&ib_dev->dev, "ib_cm: Couldn't retrieve pkey for incoming request (port %d, pkey index %d). %d\n", port_num, pkey_index, ret); return 0; } return pkey; } /** * Convert OPA SGID to IB SGID * ULPs (such as IPoIB) do not understand OPA GIDs and will * reject them as the local_gid will not match the sgid. Therefore, * change the pathrec's SGID to an IB SGID. * * @work: Work completion * @path: Path record */ static void cm_opa_to_ib_sgid(struct cm_work *work, struct sa_path_rec *path) { struct ib_device *dev = work->port->cm_dev->ib_device; u8 port_num = work->port->port_num; if (rdma_cap_opa_ah(dev, port_num) && (ib_is_opa_gid(&path->sgid))) { union ib_gid sgid; if (rdma_query_gid(dev, port_num, 0, &sgid)) { dev_warn(&dev->dev, "Error updating sgid in CM request\n"); return; } path->sgid = sgid; } } static void cm_format_req_event(struct cm_work *work, struct cm_id_private *cm_id_priv, struct ib_cm_id *listen_id) { struct cm_req_msg *req_msg; struct ib_cm_req_event_param *param; req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; param = &work->cm_event.param.req_rcvd; param->listen_id = listen_id; param->bth_pkey = cm_get_bth_pkey(work); param->port = cm_id_priv->av.port->port_num; param->primary_path = &work->path[0]; cm_opa_to_ib_sgid(work, param->primary_path); if (cm_req_has_alt_path(req_msg)) { param->alternate_path = &work->path[1]; cm_opa_to_ib_sgid(work, param->alternate_path); } else { param->alternate_path = NULL; } param->remote_ca_guid = req_msg->local_ca_guid; param->remote_qkey = be32_to_cpu(req_msg->local_qkey); param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg)); param->qp_type = cm_req_get_qp_type(req_msg); param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg)); param->responder_resources = cm_req_get_init_depth(req_msg); param->initiator_depth = cm_req_get_resp_res(req_msg); param->local_cm_response_timeout = cm_req_get_remote_resp_timeout(req_msg); param->flow_control = cm_req_get_flow_ctrl(req_msg); param->remote_cm_response_timeout = cm_req_get_local_resp_timeout(req_msg); param->retry_count = cm_req_get_retry_count(req_msg); param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); param->srq = cm_req_get_srq(req_msg); param->ppath_sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr; work->cm_event.private_data = &req_msg->private_data; } static void cm_process_work(struct cm_id_private *cm_id_priv, struct cm_work *work) { int ret; /* We will typically only have the current event to report. */ ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); cm_free_work(work); while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { spin_lock_irq(&cm_id_priv->lock); work = cm_dequeue_work(cm_id_priv); spin_unlock_irq(&cm_id_priv->lock); if (!work) return; ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); cm_free_work(work); } cm_deref_id(cm_id_priv); if (ret) cm_destroy_id(&cm_id_priv->id, ret); } static void cm_format_mra(struct cm_mra_msg *mra_msg, struct cm_id_private *cm_id_priv, enum cm_msg_response msg_mraed, u8 service_timeout, const void *private_data, u8 private_data_len) { cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); cm_mra_set_msg_mraed(mra_msg, msg_mraed); mra_msg->local_comm_id = cm_id_priv->id.local_id; mra_msg->remote_comm_id = cm_id_priv->id.remote_id; cm_mra_set_service_timeout(mra_msg, service_timeout); if (private_data && private_data_len) memcpy(mra_msg->private_data, private_data, private_data_len); } static void cm_format_rej(struct cm_rej_msg *rej_msg, struct cm_id_private *cm_id_priv, enum ib_cm_rej_reason reason, void *ari, u8 ari_length, const void *private_data, u8 private_data_len) { cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); rej_msg->remote_comm_id = cm_id_priv->id.remote_id; switch(cm_id_priv->id.state) { case IB_CM_REQ_RCVD: rej_msg->local_comm_id = 0; cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); break; case IB_CM_MRA_REQ_SENT: rej_msg->local_comm_id = cm_id_priv->id.local_id; cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ); break; case IB_CM_REP_RCVD: case IB_CM_MRA_REP_SENT: rej_msg->local_comm_id = cm_id_priv->id.local_id; cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP); break; default: rej_msg->local_comm_id = cm_id_priv->id.local_id; cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER); break; } rej_msg->reason = cpu_to_be16(reason); if (ari && ari_length) { cm_rej_set_reject_info_len(rej_msg, ari_length); memcpy(rej_msg->ari, ari, ari_length); } if (private_data && private_data_len) memcpy(rej_msg->private_data, private_data, private_data_len); } static void cm_dup_req_handler(struct cm_work *work, struct cm_id_private *cm_id_priv) { struct ib_mad_send_buf *msg = NULL; int ret; atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. counter[CM_REQ_COUNTER]); /* Quick state check to discard duplicate REQs. */ if (cm_id_priv->id.state == IB_CM_REQ_RCVD) return; ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); if (ret) return; spin_lock_irq(&cm_id_priv->lock); switch (cm_id_priv->id.state) { case IB_CM_MRA_REQ_SENT: cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout, cm_id_priv->private_data, cm_id_priv->private_data_len); break; case IB_CM_TIMEWAIT: cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0); break; default: goto unlock; } spin_unlock_irq(&cm_id_priv->lock); ret = ib_post_send_mad(msg, NULL); if (ret) goto free; return; unlock: spin_unlock_irq(&cm_id_priv->lock); free: cm_free_msg(msg); } static struct cm_id_private * cm_match_req(struct cm_work *work, struct cm_id_private *cm_id_priv) { struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; struct cm_timewait_info *timewait_info; struct cm_req_msg *req_msg; struct ib_cm_id *cm_id; req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; /* Check for possible duplicate REQ. */ spin_lock_irq(&cm.lock); timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); if (timewait_info) { cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, timewait_info->work.remote_id); spin_unlock_irq(&cm.lock); if (cur_cm_id_priv) { cm_dup_req_handler(work, cur_cm_id_priv); cm_deref_id(cur_cm_id_priv); } return NULL; } /* Check for stale connections. */ timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); if (timewait_info) { cm_cleanup_timewait(cm_id_priv->timewait_info); cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, timewait_info->work.remote_id); spin_unlock_irq(&cm.lock); cm_issue_rej(work->port, work->mad_recv_wc, IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, NULL, 0); if (cur_cm_id_priv) { cm_id = &cur_cm_id_priv->id; ib_send_cm_dreq(cm_id, NULL, 0); cm_deref_id(cur_cm_id_priv); } return NULL; } /* Find matching listen request. */ listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, req_msg->service_id); if (!listen_cm_id_priv) { cm_cleanup_timewait(cm_id_priv->timewait_info); spin_unlock_irq(&cm.lock); cm_issue_rej(work->port, work->mad_recv_wc, IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, NULL, 0); goto out; } atomic_inc(&listen_cm_id_priv->refcount); atomic_inc(&cm_id_priv->refcount); cm_id_priv->id.state = IB_CM_REQ_RCVD; atomic_inc(&cm_id_priv->work_count); spin_unlock_irq(&cm.lock); out: return listen_cm_id_priv; } /* * Work-around for inter-subnet connections. If the LIDs are permissive, * we need to override the LID/SL data in the REQ with the LID information * in the work completion. */ static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc) { if (!cm_req_get_primary_subnet_local(req_msg)) { if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) { req_msg->primary_local_lid = ib_lid_be16(wc->slid); cm_req_set_primary_sl(req_msg, wc->sl); } if (req_msg->primary_remote_lid == IB_LID_PERMISSIVE) req_msg->primary_remote_lid = cpu_to_be16(wc->dlid_path_bits); } if (!cm_req_get_alt_subnet_local(req_msg)) { if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) { req_msg->alt_local_lid = ib_lid_be16(wc->slid); cm_req_set_alt_sl(req_msg, wc->sl); } if (req_msg->alt_remote_lid == IB_LID_PERMISSIVE) req_msg->alt_remote_lid = cpu_to_be16(wc->dlid_path_bits); } } static int cm_req_handler(struct cm_work *work) { struct ib_cm_id *cm_id; struct cm_id_private *cm_id_priv, *listen_cm_id_priv; struct cm_req_msg *req_msg; const struct ib_global_route *grh; const struct ib_gid_attr *gid_attr; int ret; req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL); if (IS_ERR(cm_id)) return PTR_ERR(cm_id); cm_id_priv = container_of(cm_id, struct cm_id_private, id); cm_id_priv->id.remote_id = req_msg->local_comm_id; ret = cm_init_av_for_response(work->port, work->mad_recv_wc->wc, work->mad_recv_wc->recv_buf.grh, &cm_id_priv->av); if (ret) goto destroy; cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> id.local_id); if (IS_ERR(cm_id_priv->timewait_info)) { ret = PTR_ERR(cm_id_priv->timewait_info); goto destroy; } cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id; cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); listen_cm_id_priv = cm_match_req(work, cm_id_priv); if (!listen_cm_id_priv) { pr_debug("%s: local_id %d, no listen_cm_id_priv\n", __func__, be32_to_cpu(cm_id->local_id)); ret = -EINVAL; goto free_timeinfo; } cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; cm_id_priv->id.context = listen_cm_id_priv->id.context; cm_id_priv->id.service_id = req_msg->service_id; cm_id_priv->id.service_mask = ~cpu_to_be64(0); cm_process_routed_req(req_msg, work->mad_recv_wc->wc); memset(&work->path[0], 0, sizeof(work->path[0])); if (cm_req_has_alt_path(req_msg)) memset(&work->path[1], 0, sizeof(work->path[1])); grh = rdma_ah_read_grh(&cm_id_priv->av.ah_attr); gid_attr = grh->sgid_attr; if (gid_attr && gid_attr->ndev) { work->path[0].rec_type = sa_conv_gid_to_pathrec_type(gid_attr->gid_type); } else { /* If no GID attribute or ndev is null, it is not RoCE. */ cm_path_set_rec_type(work->port->cm_dev->ib_device, work->port->port_num, &work->path[0], &req_msg->primary_local_gid); } if (cm_req_has_alt_path(req_msg)) work->path[1].rec_type = work->path[0].rec_type; cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]); if (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE) sa_path_set_dmac(&work->path[0], cm_id_priv->av.ah_attr.roce.dmac); work->path[0].hop_limit = grh->hop_limit; ret = cm_init_av_by_path(&work->path[0], gid_attr, &cm_id_priv->av, cm_id_priv); if (ret) { int err; err = rdma_query_gid(work->port->cm_dev->ib_device, work->port->port_num, 0, &work->path[0].sgid); if (err) ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, NULL, 0, NULL, 0); else ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID, &work->path[0].sgid, sizeof(work->path[0].sgid), NULL, 0); goto rejected; } if (cm_req_has_alt_path(req_msg)) { ret = cm_init_av_by_path(&work->path[1], NULL, &cm_id_priv->alt_av, cm_id_priv); if (ret) { ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID, &work->path[0].sgid, sizeof(work->path[0].sgid), NULL, 0); goto rejected; } } cm_id_priv->tid = req_msg->hdr.tid; cm_id_priv->timeout_ms = cm_convert_to_ms( cm_req_get_local_resp_timeout(req_msg)); cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg); cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg); cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg); cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg); cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg); cm_id_priv->pkey = req_msg->pkey; cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg); cm_id_priv->retry_count = cm_req_get_retry_count(req_msg); cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg); cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); cm_process_work(cm_id_priv, work); cm_deref_id(listen_cm_id_priv); return 0; rejected: atomic_dec(&cm_id_priv->refcount); cm_deref_id(listen_cm_id_priv); free_timeinfo: kfree(cm_id_priv->timewait_info); destroy: ib_destroy_cm_id(cm_id); return ret; } static void cm_format_rep(struct cm_rep_msg *rep_msg, struct cm_id_private *cm_id_priv, struct ib_cm_rep_param *param) { cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid); rep_msg->local_comm_id = cm_id_priv->id.local_id; rep_msg->remote_comm_id = cm_id_priv->id.remote_id; cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn)); rep_msg->resp_resources = param->responder_resources; cm_rep_set_target_ack_delay(rep_msg, cm_id_priv->av.port->cm_dev->ack_delay); cm_rep_set_failover(rep_msg, param->failover_accepted); cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count); rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid; if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) { rep_msg->initiator_depth = param->initiator_depth; cm_rep_set_flow_ctrl(rep_msg, param->flow_control); cm_rep_set_srq(rep_msg, param->srq); cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num)); } else { cm_rep_set_srq(rep_msg, 1); cm_rep_set_local_eecn(rep_msg, cpu_to_be32(param->qp_num)); } if (param->private_data && param->private_data_len) memcpy(rep_msg->private_data, param->private_data, param->private_data_len); } int ib_send_cm_rep(struct ib_cm_id *cm_id, struct ib_cm_rep_param *param) { struct cm_id_private *cm_id_priv; struct ib_mad_send_buf *msg; struct cm_rep_msg *rep_msg; unsigned long flags; int ret; if (param->private_data && param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) return -EINVAL; cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); if (cm_id->state != IB_CM_REQ_RCVD && cm_id->state != IB_CM_MRA_REQ_SENT) { pr_debug("%s: local_comm_id %d, cm_id->state: %d\n", __func__, be32_to_cpu(cm_id_priv->id.local_id), cm_id->state); ret = -EINVAL; goto out; } ret = cm_alloc_msg(cm_id_priv, &msg); if (ret) goto out; rep_msg = (struct cm_rep_msg *) msg->mad; cm_format_rep(rep_msg, cm_id_priv, param); msg->timeout_ms = cm_id_priv->timeout_ms; msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT; ret = ib_post_send_mad(msg, NULL); if (ret) { spin_unlock_irqrestore(&cm_id_priv->lock, flags); cm_free_msg(msg); return ret; } cm_id->state = IB_CM_REP_SENT; cm_id_priv->msg = msg; cm_id_priv->initiator_depth = param->initiator_depth; cm_id_priv->responder_resources = param->responder_resources; cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg); cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF); out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } EXPORT_SYMBOL(ib_send_cm_rep); static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, struct cm_id_private *cm_id_priv, const void *private_data, u8 private_data_len) { cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); rtu_msg->local_comm_id = cm_id_priv->id.local_id; rtu_msg->remote_comm_id = cm_id_priv->id.remote_id; if (private_data && private_data_len) memcpy(rtu_msg->private_data, private_data, private_data_len); } int ib_send_cm_rtu(struct ib_cm_id *cm_id, const void *private_data, u8 private_data_len) { struct cm_id_private *cm_id_priv; struct ib_mad_send_buf *msg; unsigned long flags; void *data; int ret; if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) return -EINVAL; data = cm_copy_private_data(private_data, private_data_len); if (IS_ERR(data)) return PTR_ERR(data); cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); if (cm_id->state != IB_CM_REP_RCVD && cm_id->state != IB_CM_MRA_REP_SENT) { pr_debug("%s: local_id %d, cm_id->state %d\n", __func__, be32_to_cpu(cm_id->local_id), cm_id->state); ret = -EINVAL; goto error; } ret = cm_alloc_msg(cm_id_priv, &msg); if (ret) goto error; cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, private_data, private_data_len); ret = ib_post_send_mad(msg, NULL); if (ret) { spin_unlock_irqrestore(&cm_id_priv->lock, flags); cm_free_msg(msg); kfree(data); return ret; } cm_id->state = IB_CM_ESTABLISHED; cm_set_private_data(cm_id_priv, data, private_data_len); spin_unlock_irqrestore(&cm_id_priv->lock, flags); return 0; error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); kfree(data); return ret; } EXPORT_SYMBOL(ib_send_cm_rtu); static void cm_format_rep_event(struct cm_work *work, enum ib_qp_type qp_type) { struct cm_rep_msg *rep_msg; struct ib_cm_rep_event_param *param; rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; param = &work->cm_event.param.rep_rcvd; param->remote_ca_guid = rep_msg->local_ca_guid; param->remote_qkey = be32_to_cpu(rep_msg->local_qkey); param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type)); param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg)); param->responder_resources = rep_msg->initiator_depth; param->initiator_depth = rep_msg->resp_resources; param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); param->failover_accepted = cm_rep_get_failover(rep_msg); param->flow_control = cm_rep_get_flow_ctrl(rep_msg); param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); param->srq = cm_rep_get_srq(rep_msg); work->cm_event.private_data = &rep_msg->private_data; } static void cm_dup_rep_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_rep_msg *rep_msg; struct ib_mad_send_buf *msg = NULL; int ret; rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, rep_msg->local_comm_id); if (!cm_id_priv) return; atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. counter[CM_REP_COUNTER]); ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); if (ret) goto deref; spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->id.state == IB_CM_ESTABLISHED) cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, cm_id_priv->private_data, cm_id_priv->private_data_len); else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout, cm_id_priv->private_data, cm_id_priv->private_data_len); else goto unlock; spin_unlock_irq(&cm_id_priv->lock); ret = ib_post_send_mad(msg, NULL); if (ret) goto free; goto deref; unlock: spin_unlock_irq(&cm_id_priv->lock); free: cm_free_msg(msg); deref: cm_deref_id(cm_id_priv); } static int cm_rep_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_rep_msg *rep_msg; int ret; struct cm_id_private *cur_cm_id_priv; struct ib_cm_id *cm_id; struct cm_timewait_info *timewait_info; rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0); if (!cm_id_priv) { cm_dup_rep_handler(work); pr_debug("%s: remote_comm_id %d, no cm_id_priv\n", __func__, be32_to_cpu(rep_msg->remote_comm_id)); return -EINVAL; } cm_format_rep_event(work, cm_id_priv->qp_type); spin_lock_irq(&cm_id_priv->lock); switch (cm_id_priv->id.state) { case IB_CM_REQ_SENT: case IB_CM_MRA_REQ_RCVD: break; default: spin_unlock_irq(&cm_id_priv->lock); ret = -EINVAL; pr_debug("%s: cm_id_priv->id.state: %d, local_comm_id %d, remote_comm_id %d\n", __func__, cm_id_priv->id.state, be32_to_cpu(rep_msg->local_comm_id), be32_to_cpu(rep_msg->remote_comm_id)); goto error; } cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id; cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid; cm_id_priv->timewait_info->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); spin_lock(&cm.lock); /* Check for duplicate REP. */ if (cm_insert_remote_id(cm_id_priv->timewait_info)) { spin_unlock(&cm.lock); spin_unlock_irq(&cm_id_priv->lock); ret = -EINVAL; pr_debug("%s: Failed to insert remote id %d\n", __func__, be32_to_cpu(rep_msg->remote_comm_id)); goto error; } /* Check for a stale connection. */ timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); if (timewait_info) { rb_erase(&cm_id_priv->timewait_info->remote_id_node, &cm.remote_id_table); cm_id_priv->timewait_info->inserted_remote_id = 0; cur_cm_id_priv = cm_get_id(timewait_info->work.local_id, timewait_info->work.remote_id); spin_unlock(&cm.lock); spin_unlock_irq(&cm_id_priv->lock); cm_issue_rej(work->port, work->mad_recv_wc, IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, NULL, 0); ret = -EINVAL; pr_debug("%s: Stale connection. local_comm_id %d, remote_comm_id %d\n", __func__, be32_to_cpu(rep_msg->local_comm_id), be32_to_cpu(rep_msg->remote_comm_id)); if (cur_cm_id_priv) { cm_id = &cur_cm_id_priv->id; ib_send_cm_dreq(cm_id, NULL, 0); cm_deref_id(cur_cm_id_priv); } goto error; } spin_unlock(&cm.lock); cm_id_priv->id.state = IB_CM_REP_RCVD; cm_id_priv->id.remote_id = rep_msg->local_comm_id; cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); cm_id_priv->initiator_depth = rep_msg->resp_resources; cm_id_priv->responder_resources = rep_msg->initiator_depth; cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg); cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg); cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg); cm_id_priv->av.timeout = cm_ack_timeout(cm_id_priv->target_ack_delay, cm_id_priv->av.timeout - 1); cm_id_priv->alt_av.timeout = cm_ack_timeout(cm_id_priv->target_ack_delay, cm_id_priv->alt_av.timeout - 1); /* todo: handle peer_to_peer */ ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); ret = atomic_inc_and_test(&cm_id_priv->work_count); if (!ret) list_add_tail(&work->list, &cm_id_priv->work_list); spin_unlock_irq(&cm_id_priv->lock); if (ret) cm_process_work(cm_id_priv, work); else cm_deref_id(cm_id_priv); return 0; error: cm_deref_id(cm_id_priv); return ret; } static int cm_establish_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; int ret; /* See comment in cm_establish about lookup. */ cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); if (!cm_id_priv) return -EINVAL; spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { spin_unlock_irq(&cm_id_priv->lock); goto out; } ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); ret = atomic_inc_and_test(&cm_id_priv->work_count); if (!ret) list_add_tail(&work->list, &cm_id_priv->work_list); spin_unlock_irq(&cm_id_priv->lock); if (ret) cm_process_work(cm_id_priv, work); else cm_deref_id(cm_id_priv); return 0; out: cm_deref_id(cm_id_priv); return -EINVAL; } static int cm_rtu_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_rtu_msg *rtu_msg; int ret; rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id, rtu_msg->local_comm_id); if (!cm_id_priv) return -EINVAL; work->cm_event.private_data = &rtu_msg->private_data; spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->id.state != IB_CM_REP_SENT && cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { spin_unlock_irq(&cm_id_priv->lock); atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. counter[CM_RTU_COUNTER]); goto out; } cm_id_priv->id.state = IB_CM_ESTABLISHED; ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); ret = atomic_inc_and_test(&cm_id_priv->work_count); if (!ret) list_add_tail(&work->list, &cm_id_priv->work_list); spin_unlock_irq(&cm_id_priv->lock); if (ret) cm_process_work(cm_id_priv, work); else cm_deref_id(cm_id_priv); return 0; out: cm_deref_id(cm_id_priv); return -EINVAL; } static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, struct cm_id_private *cm_id_priv, const void *private_data, u8 private_data_len) { cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, cm_form_tid(cm_id_priv)); dreq_msg->local_comm_id = cm_id_priv->id.local_id; dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); if (private_data && private_data_len) memcpy(dreq_msg->private_data, private_data, private_data_len); } int ib_send_cm_dreq(struct ib_cm_id *cm_id, const void *private_data, u8 private_data_len) { struct cm_id_private *cm_id_priv; struct ib_mad_send_buf *msg; unsigned long flags; int ret; if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) return -EINVAL; cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); if (cm_id->state != IB_CM_ESTABLISHED) { pr_debug("%s: local_id %d, cm_id->state: %d\n", __func__, be32_to_cpu(cm_id->local_id), cm_id->state); ret = -EINVAL; goto out; } if (cm_id->lap_state == IB_CM_LAP_SENT || cm_id->lap_state == IB_CM_MRA_LAP_RCVD) ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); ret = cm_alloc_msg(cm_id_priv, &msg); if (ret) { cm_enter_timewait(cm_id_priv); goto out; } cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, private_data, private_data_len); msg->timeout_ms = cm_id_priv->timeout_ms; msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT; ret = ib_post_send_mad(msg, NULL); if (ret) { cm_enter_timewait(cm_id_priv); spin_unlock_irqrestore(&cm_id_priv->lock, flags); cm_free_msg(msg); return ret; } cm_id->state = IB_CM_DREQ_SENT; cm_id_priv->msg = msg; out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } EXPORT_SYMBOL(ib_send_cm_dreq); static void cm_format_drep(struct cm_drep_msg *drep_msg, struct cm_id_private *cm_id_priv, const void *private_data, u8 private_data_len) { cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); drep_msg->local_comm_id = cm_id_priv->id.local_id; drep_msg->remote_comm_id = cm_id_priv->id.remote_id; if (private_data && private_data_len) memcpy(drep_msg->private_data, private_data, private_data_len); } int ib_send_cm_drep(struct ib_cm_id *cm_id, const void *private_data, u8 private_data_len) { struct cm_id_private *cm_id_priv; struct ib_mad_send_buf *msg; unsigned long flags; void *data; int ret; if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) return -EINVAL; data = cm_copy_private_data(private_data, private_data_len); if (IS_ERR(data)) return PTR_ERR(data); cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); if (cm_id->state != IB_CM_DREQ_RCVD) { spin_unlock_irqrestore(&cm_id_priv->lock, flags); kfree(data); pr_debug("%s: local_id %d, cm_idcm_id->state(%d) != IB_CM_DREQ_RCVD\n", __func__, be32_to_cpu(cm_id->local_id), cm_id->state); return -EINVAL; } cm_set_private_data(cm_id_priv, data, private_data_len); cm_enter_timewait(cm_id_priv); ret = cm_alloc_msg(cm_id_priv, &msg); if (ret) goto out; cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, private_data, private_data_len); ret = ib_post_send_mad(msg, NULL); if (ret) { spin_unlock_irqrestore(&cm_id_priv->lock, flags); cm_free_msg(msg); return ret; } out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } EXPORT_SYMBOL(ib_send_cm_drep); static int cm_issue_drep(struct cm_port *port, struct ib_mad_recv_wc *mad_recv_wc) { struct ib_mad_send_buf *msg = NULL; struct cm_dreq_msg *dreq_msg; struct cm_drep_msg *drep_msg; int ret; ret = cm_alloc_response_msg(port, mad_recv_wc, &msg); if (ret) return ret; dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; drep_msg = (struct cm_drep_msg *) msg->mad; cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); drep_msg->remote_comm_id = dreq_msg->local_comm_id; drep_msg->local_comm_id = dreq_msg->remote_comm_id; ret = ib_post_send_mad(msg, NULL); if (ret) cm_free_msg(msg); return ret; } static int cm_dreq_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_dreq_msg *dreq_msg; struct ib_mad_send_buf *msg = NULL; int ret; dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, dreq_msg->local_comm_id); if (!cm_id_priv) { atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. counter[CM_DREQ_COUNTER]); cm_issue_drep(work->port, work->mad_recv_wc); pr_debug("%s: no cm_id_priv, local_comm_id %d, remote_comm_id %d\n", __func__, be32_to_cpu(dreq_msg->local_comm_id), be32_to_cpu(dreq_msg->remote_comm_id)); return -EINVAL; } work->cm_event.private_data = &dreq_msg->private_data; spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg)) goto unlock; switch (cm_id_priv->id.state) { case IB_CM_REP_SENT: case IB_CM_DREQ_SENT: ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); break; case IB_CM_ESTABLISHED: if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT || cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); break; case IB_CM_MRA_REP_RCVD: break; case IB_CM_TIMEWAIT: atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. counter[CM_DREQ_COUNTER]); msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc); if (IS_ERR(msg)) goto unlock; cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, cm_id_priv->private_data, cm_id_priv->private_data_len); spin_unlock_irq(&cm_id_priv->lock); if (cm_create_response_msg_ah(work->port, work->mad_recv_wc, msg) || ib_post_send_mad(msg, NULL)) cm_free_msg(msg); goto deref; case IB_CM_DREQ_RCVD: atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. counter[CM_DREQ_COUNTER]); goto unlock; default: pr_debug("%s: local_id %d, cm_id_priv->id.state: %d\n", __func__, be32_to_cpu(cm_id_priv->id.local_id), cm_id_priv->id.state); goto unlock; } cm_id_priv->id.state = IB_CM_DREQ_RCVD; cm_id_priv->tid = dreq_msg->hdr.tid; ret = atomic_inc_and_test(&cm_id_priv->work_count); if (!ret) list_add_tail(&work->list, &cm_id_priv->work_list); spin_unlock_irq(&cm_id_priv->lock); if (ret) cm_process_work(cm_id_priv, work); else cm_deref_id(cm_id_priv); return 0; unlock: spin_unlock_irq(&cm_id_priv->lock); deref: cm_deref_id(cm_id_priv); return -EINVAL; } static int cm_drep_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_drep_msg *drep_msg; int ret; drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id, drep_msg->local_comm_id); if (!cm_id_priv) return -EINVAL; work->cm_event.private_data = &drep_msg->private_data; spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->id.state != IB_CM_DREQ_SENT && cm_id_priv->id.state != IB_CM_DREQ_RCVD) { spin_unlock_irq(&cm_id_priv->lock); goto out; } cm_enter_timewait(cm_id_priv); ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); ret = atomic_inc_and_test(&cm_id_priv->work_count); if (!ret) list_add_tail(&work->list, &cm_id_priv->work_list); spin_unlock_irq(&cm_id_priv->lock); if (ret) cm_process_work(cm_id_priv, work); else cm_deref_id(cm_id_priv); return 0; out: cm_deref_id(cm_id_priv); return -EINVAL; } int ib_send_cm_rej(struct ib_cm_id *cm_id, enum ib_cm_rej_reason reason, void *ari, u8 ari_length, const void *private_data, u8 private_data_len) { struct cm_id_private *cm_id_priv; struct ib_mad_send_buf *msg; unsigned long flags; int ret; if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) return -EINVAL; cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); switch (cm_id->state) { case IB_CM_REQ_SENT: case IB_CM_MRA_REQ_RCVD: case IB_CM_REQ_RCVD: case IB_CM_MRA_REQ_SENT: case IB_CM_REP_RCVD: case IB_CM_MRA_REP_SENT: ret = cm_alloc_msg(cm_id_priv, &msg); if (!ret) cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, reason, ari, ari_length, private_data, private_data_len); cm_reset_to_idle(cm_id_priv); break; case IB_CM_REP_SENT: case IB_CM_MRA_REP_RCVD: ret = cm_alloc_msg(cm_id_priv, &msg); if (!ret) cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv, reason, ari, ari_length, private_data, private_data_len); cm_enter_timewait(cm_id_priv); break; default: pr_debug("%s: local_id %d, cm_id->state: %d\n", __func__, be32_to_cpu(cm_id_priv->id.local_id), cm_id->state); ret = -EINVAL; goto out; } if (ret) goto out; ret = ib_post_send_mad(msg, NULL); if (ret) cm_free_msg(msg); out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } EXPORT_SYMBOL(ib_send_cm_rej); static void cm_format_rej_event(struct cm_work *work) { struct cm_rej_msg *rej_msg; struct ib_cm_rej_event_param *param; rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; param = &work->cm_event.param.rej_rcvd; param->ari = rej_msg->ari; param->ari_length = cm_rej_get_reject_info_len(rej_msg); param->reason = __be16_to_cpu(rej_msg->reason); work->cm_event.private_data = &rej_msg->private_data; } static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) { struct cm_timewait_info *timewait_info; struct cm_id_private *cm_id_priv; __be32 remote_id; remote_id = rej_msg->local_comm_id; if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) { spin_lock_irq(&cm.lock); timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari), remote_id); if (!timewait_info) { spin_unlock_irq(&cm.lock); return NULL; } cm_id_priv = idr_find(&cm.local_id_table, (__force int) (timewait_info->work.local_id ^ cm.random_id_operand)); if (cm_id_priv) { if (cm_id_priv->id.remote_id == remote_id) atomic_inc(&cm_id_priv->refcount); else cm_id_priv = NULL; } spin_unlock_irq(&cm.lock); } else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ) cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0); else cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id); return cm_id_priv; } static int cm_rej_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_rej_msg *rej_msg; int ret; rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_rejected_id(rej_msg); if (!cm_id_priv) return -EINVAL; cm_format_rej_event(work); spin_lock_irq(&cm_id_priv->lock); switch (cm_id_priv->id.state) { case IB_CM_REQ_SENT: case IB_CM_MRA_REQ_RCVD: case IB_CM_REP_SENT: case IB_CM_MRA_REP_RCVD: ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); /* fall through */ case IB_CM_REQ_RCVD: case IB_CM_MRA_REQ_SENT: if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN) cm_enter_timewait(cm_id_priv); else cm_reset_to_idle(cm_id_priv); break; case IB_CM_DREQ_SENT: ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); /* fall through */ case IB_CM_REP_RCVD: case IB_CM_MRA_REP_SENT: cm_enter_timewait(cm_id_priv); break; case IB_CM_ESTABLISHED: if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT || cm_id_priv->id.lap_state == IB_CM_LAP_SENT) { if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT) ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); cm_enter_timewait(cm_id_priv); break; } /* fall through */ default: spin_unlock_irq(&cm_id_priv->lock); pr_debug("%s: local_id %d, cm_id_priv->id.state: %d\n", __func__, be32_to_cpu(cm_id_priv->id.local_id), cm_id_priv->id.state); ret = -EINVAL; goto out; } ret = atomic_inc_and_test(&cm_id_priv->work_count); if (!ret) list_add_tail(&work->list, &cm_id_priv->work_list); spin_unlock_irq(&cm_id_priv->lock); if (ret) cm_process_work(cm_id_priv, work); else cm_deref_id(cm_id_priv); return 0; out: cm_deref_id(cm_id_priv); return -EINVAL; } int ib_send_cm_mra(struct ib_cm_id *cm_id, u8 service_timeout, const void *private_data, u8 private_data_len) { struct cm_id_private *cm_id_priv; struct ib_mad_send_buf *msg; enum ib_cm_state cm_state; enum ib_cm_lap_state lap_state; enum cm_msg_response msg_response; void *data; unsigned long flags; int ret; if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE) return -EINVAL; data = cm_copy_private_data(private_data, private_data_len); if (IS_ERR(data)) return PTR_ERR(data); cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); switch(cm_id_priv->id.state) { case IB_CM_REQ_RCVD: cm_state = IB_CM_MRA_REQ_SENT; lap_state = cm_id->lap_state; msg_response = CM_MSG_RESPONSE_REQ; break; case IB_CM_REP_RCVD: cm_state = IB_CM_MRA_REP_SENT; lap_state = cm_id->lap_state; msg_response = CM_MSG_RESPONSE_REP; break; case IB_CM_ESTABLISHED: if (cm_id->lap_state == IB_CM_LAP_RCVD) { cm_state = cm_id->state; lap_state = IB_CM_MRA_LAP_SENT; msg_response = CM_MSG_RESPONSE_OTHER; break; } /* fall through */ default: pr_debug("%s: local_id %d, cm_id_priv->id.state: %d\n", __func__, be32_to_cpu(cm_id_priv->id.local_id), cm_id_priv->id.state); ret = -EINVAL; goto error1; } if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) { ret = cm_alloc_msg(cm_id_priv, &msg); if (ret) goto error1; cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, msg_response, service_timeout, private_data, private_data_len); ret = ib_post_send_mad(msg, NULL); if (ret) goto error2; } cm_id->state = cm_state; cm_id->lap_state = lap_state; cm_id_priv->service_timeout = service_timeout; cm_set_private_data(cm_id_priv, data, private_data_len); spin_unlock_irqrestore(&cm_id_priv->lock, flags); return 0; error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags); kfree(data); return ret; error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags); kfree(data); cm_free_msg(msg); return ret; } EXPORT_SYMBOL(ib_send_cm_mra); static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) { switch (cm_mra_get_msg_mraed(mra_msg)) { case CM_MSG_RESPONSE_REQ: return cm_acquire_id(mra_msg->remote_comm_id, 0); case CM_MSG_RESPONSE_REP: case CM_MSG_RESPONSE_OTHER: return cm_acquire_id(mra_msg->remote_comm_id, mra_msg->local_comm_id); default: return NULL; } } static int cm_mra_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_mra_msg *mra_msg; int timeout, ret; mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_mraed_id(mra_msg); if (!cm_id_priv) return -EINVAL; work->cm_event.private_data = &mra_msg->private_data; work->cm_event.param.mra_rcvd.service_timeout = cm_mra_get_service_timeout(mra_msg); timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) + cm_convert_to_ms(cm_id_priv->av.timeout); spin_lock_irq(&cm_id_priv->lock); switch (cm_id_priv->id.state) { case IB_CM_REQ_SENT: if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ || ib_modify_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg, timeout)) goto out; cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; break; case IB_CM_REP_SENT: if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP || ib_modify_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg, timeout)) goto out; cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; break; case IB_CM_ESTABLISHED: if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || cm_id_priv->id.lap_state != IB_CM_LAP_SENT || ib_modify_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg, timeout)) { if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) atomic_long_inc(&work->port-> counter_group[CM_RECV_DUPLICATES]. counter[CM_MRA_COUNTER]); goto out; } cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; break; case IB_CM_MRA_REQ_RCVD: case IB_CM_MRA_REP_RCVD: atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. counter[CM_MRA_COUNTER]); /* fall through */ default: pr_debug("%s local_id %d, cm_id_priv->id.state: %d\n", __func__, be32_to_cpu(cm_id_priv->id.local_id), cm_id_priv->id.state); goto out; } cm_id_priv->msg->context[1] = (void *) (unsigned long) cm_id_priv->id.state; ret = atomic_inc_and_test(&cm_id_priv->work_count); if (!ret) list_add_tail(&work->list, &cm_id_priv->work_list); spin_unlock_irq(&cm_id_priv->lock); if (ret) cm_process_work(cm_id_priv, work); else cm_deref_id(cm_id_priv); return 0; out: spin_unlock_irq(&cm_id_priv->lock); cm_deref_id(cm_id_priv); return -EINVAL; } static void cm_format_lap(struct cm_lap_msg *lap_msg, struct cm_id_private *cm_id_priv, struct sa_path_rec *alternate_path, const void *private_data, u8 private_data_len) { bool alt_ext = false; if (alternate_path->rec_type == SA_PATH_REC_TYPE_OPA) alt_ext = opa_is_extended_lid(alternate_path->opa.dlid, alternate_path->opa.slid); cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, cm_form_tid(cm_id_priv)); lap_msg->local_comm_id = cm_id_priv->id.local_id; lap_msg->remote_comm_id = cm_id_priv->id.remote_id; cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); /* todo: need remote CM response timeout */ cm_lap_set_remote_resp_timeout(lap_msg, 0x1F); lap_msg->alt_local_lid = htons(ntohl(sa_path_get_slid(alternate_path))); lap_msg->alt_remote_lid = htons(ntohl(sa_path_get_dlid(alternate_path))); lap_msg->alt_local_gid = alternate_path->sgid; lap_msg->alt_remote_gid = alternate_path->dgid; if (alt_ext) { lap_msg->alt_local_gid.global.interface_id = OPA_MAKE_ID(be32_to_cpu(alternate_path->opa.slid)); lap_msg->alt_remote_gid.global.interface_id = OPA_MAKE_ID(be32_to_cpu(alternate_path->opa.dlid)); } cm_lap_set_flow_label(lap_msg, alternate_path->flow_label); cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class); lap_msg->alt_hop_limit = alternate_path->hop_limit; cm_lap_set_packet_rate(lap_msg, alternate_path->rate); cm_lap_set_sl(lap_msg, alternate_path->sl); cm_lap_set_subnet_local(lap_msg, 1); /* local only... */ cm_lap_set_local_ack_timeout(lap_msg, cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, alternate_path->packet_life_time)); if (private_data && private_data_len) memcpy(lap_msg->private_data, private_data, private_data_len); } int ib_send_cm_lap(struct ib_cm_id *cm_id, struct sa_path_rec *alternate_path, const void *private_data, u8 private_data_len) { struct cm_id_private *cm_id_priv; struct ib_mad_send_buf *msg; unsigned long flags; int ret; if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE) return -EINVAL; cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); if (cm_id->state != IB_CM_ESTABLISHED || (cm_id->lap_state != IB_CM_LAP_UNINIT && cm_id->lap_state != IB_CM_LAP_IDLE)) { ret = -EINVAL; goto out; } ret = cm_init_av_by_path(alternate_path, NULL, &cm_id_priv->alt_av, cm_id_priv); if (ret) goto out; cm_id_priv->alt_av.timeout = cm_ack_timeout(cm_id_priv->target_ack_delay, cm_id_priv->alt_av.timeout - 1); ret = cm_alloc_msg(cm_id_priv, &msg); if (ret) goto out; cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv, alternate_path, private_data, private_data_len); msg->timeout_ms = cm_id_priv->timeout_ms; msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED; ret = ib_post_send_mad(msg, NULL); if (ret) { spin_unlock_irqrestore(&cm_id_priv->lock, flags); cm_free_msg(msg); return ret; } cm_id->lap_state = IB_CM_LAP_SENT; cm_id_priv->msg = msg; out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } EXPORT_SYMBOL(ib_send_cm_lap); static void cm_format_path_lid_from_lap(struct cm_lap_msg *lap_msg, struct sa_path_rec *path) { u32 lid; if (path->rec_type != SA_PATH_REC_TYPE_OPA) { sa_path_set_dlid(path, ntohs(lap_msg->alt_local_lid)); sa_path_set_slid(path, ntohs(lap_msg->alt_remote_lid)); } else { lid = opa_get_lid_from_gid(&lap_msg->alt_local_gid); sa_path_set_dlid(path, lid); lid = opa_get_lid_from_gid(&lap_msg->alt_remote_gid); sa_path_set_slid(path, lid); } } static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv, struct sa_path_rec *path, struct cm_lap_msg *lap_msg) { path->dgid = lap_msg->alt_local_gid; path->sgid = lap_msg->alt_remote_gid; path->flow_label = cm_lap_get_flow_label(lap_msg); path->hop_limit = lap_msg->alt_hop_limit; path->traffic_class = cm_lap_get_traffic_class(lap_msg); path->reversible = 1; path->pkey = cm_id_priv->pkey; path->sl = cm_lap_get_sl(lap_msg); path->mtu_selector = IB_SA_EQ; path->mtu = cm_id_priv->path_mtu; path->rate_selector = IB_SA_EQ; path->rate = cm_lap_get_packet_rate(lap_msg); path->packet_life_time_selector = IB_SA_EQ; path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg); path->packet_life_time -= (path->packet_life_time > 0); cm_format_path_lid_from_lap(lap_msg, path); } static int cm_lap_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_lap_msg *lap_msg; struct ib_cm_lap_event_param *param; struct ib_mad_send_buf *msg = NULL; int ret; /* Currently Alternate path messages are not supported for * RoCE link layer. */ if (rdma_protocol_roce(work->port->cm_dev->ib_device, work->port->port_num)) return -EINVAL; /* todo: verify LAP request and send reject APR if invalid. */ lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id, lap_msg->local_comm_id); if (!cm_id_priv) return -EINVAL; param = &work->cm_event.param.lap_rcvd; memset(&work->path[0], 0, sizeof(work->path[1])); cm_path_set_rec_type(work->port->cm_dev->ib_device, work->port->port_num, &work->path[0], &lap_msg->alt_local_gid); param->alternate_path = &work->path[0]; cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); work->cm_event.private_data = &lap_msg->private_data; spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->id.state != IB_CM_ESTABLISHED) goto unlock; switch (cm_id_priv->id.lap_state) { case IB_CM_LAP_UNINIT: case IB_CM_LAP_IDLE: break; case IB_CM_MRA_LAP_SENT: atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. counter[CM_LAP_COUNTER]); msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc); if (IS_ERR(msg)) goto unlock; cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, CM_MSG_RESPONSE_OTHER, cm_id_priv->service_timeout, cm_id_priv->private_data, cm_id_priv->private_data_len); spin_unlock_irq(&cm_id_priv->lock); if (cm_create_response_msg_ah(work->port, work->mad_recv_wc, msg) || ib_post_send_mad(msg, NULL)) cm_free_msg(msg); goto deref; case IB_CM_LAP_RCVD: atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. counter[CM_LAP_COUNTER]); goto unlock; default: goto unlock; } ret = cm_init_av_for_lap(work->port, work->mad_recv_wc->wc, work->mad_recv_wc->recv_buf.grh, &cm_id_priv->av); if (ret) goto unlock; ret = cm_init_av_by_path(param->alternate_path, NULL, &cm_id_priv->alt_av, cm_id_priv); if (ret) goto unlock; cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; cm_id_priv->tid = lap_msg->hdr.tid; ret = atomic_inc_and_test(&cm_id_priv->work_count); if (!ret) list_add_tail(&work->list, &cm_id_priv->work_list); spin_unlock_irq(&cm_id_priv->lock); if (ret) cm_process_work(cm_id_priv, work); else cm_deref_id(cm_id_priv); return 0; unlock: spin_unlock_irq(&cm_id_priv->lock); deref: cm_deref_id(cm_id_priv); return -EINVAL; } static void cm_format_apr(struct cm_apr_msg *apr_msg, struct cm_id_private *cm_id_priv, enum ib_cm_apr_status status, void *info, u8 info_length, const void *private_data, u8 private_data_len) { cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid); apr_msg->local_comm_id = cm_id_priv->id.local_id; apr_msg->remote_comm_id = cm_id_priv->id.remote_id; apr_msg->ap_status = (u8) status; if (info && info_length) { apr_msg->info_length = info_length; memcpy(apr_msg->info, info, info_length); } if (private_data && private_data_len) memcpy(apr_msg->private_data, private_data, private_data_len); } int ib_send_cm_apr(struct ib_cm_id *cm_id, enum ib_cm_apr_status status, void *info, u8 info_length, const void *private_data, u8 private_data_len) { struct cm_id_private *cm_id_priv; struct ib_mad_send_buf *msg; unsigned long flags; int ret; if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) || (info && info_length > IB_CM_APR_INFO_LENGTH)) return -EINVAL; cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); if (cm_id->state != IB_CM_ESTABLISHED || (cm_id->lap_state != IB_CM_LAP_RCVD && cm_id->lap_state != IB_CM_MRA_LAP_SENT)) { ret = -EINVAL; goto out; } ret = cm_alloc_msg(cm_id_priv, &msg); if (ret) goto out; cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status, info, info_length, private_data, private_data_len); ret = ib_post_send_mad(msg, NULL); if (ret) { spin_unlock_irqrestore(&cm_id_priv->lock, flags); cm_free_msg(msg); return ret; } cm_id->lap_state = IB_CM_LAP_IDLE; out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } EXPORT_SYMBOL(ib_send_cm_apr); static int cm_apr_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_apr_msg *apr_msg; int ret; /* Currently Alternate path messages are not supported for * RoCE link layer. */ if (rdma_protocol_roce(work->port->cm_dev->ib_device, work->port->port_num)) return -EINVAL; apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id, apr_msg->local_comm_id); if (!cm_id_priv) return -EINVAL; /* Unmatched reply. */ work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status; work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info; work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length; work->cm_event.private_data = &apr_msg->private_data; spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->id.state != IB_CM_ESTABLISHED || (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { spin_unlock_irq(&cm_id_priv->lock); goto out; } cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); cm_id_priv->msg = NULL; ret = atomic_inc_and_test(&cm_id_priv->work_count); if (!ret) list_add_tail(&work->list, &cm_id_priv->work_list); spin_unlock_irq(&cm_id_priv->lock); if (ret) cm_process_work(cm_id_priv, work); else cm_deref_id(cm_id_priv); return 0; out: cm_deref_id(cm_id_priv); return -EINVAL; } static int cm_timewait_handler(struct cm_work *work) { struct cm_timewait_info *timewait_info; struct cm_id_private *cm_id_priv; int ret; timewait_info = (struct cm_timewait_info *)work; spin_lock_irq(&cm.lock); list_del(&timewait_info->list); spin_unlock_irq(&cm.lock); cm_id_priv = cm_acquire_id(timewait_info->work.local_id, timewait_info->work.remote_id); if (!cm_id_priv) return -EINVAL; spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->id.state != IB_CM_TIMEWAIT || cm_id_priv->remote_qpn != timewait_info->remote_qpn) { spin_unlock_irq(&cm_id_priv->lock); goto out; } cm_id_priv->id.state = IB_CM_IDLE; ret = atomic_inc_and_test(&cm_id_priv->work_count); if (!ret) list_add_tail(&work->list, &cm_id_priv->work_list); spin_unlock_irq(&cm_id_priv->lock); if (ret) cm_process_work(cm_id_priv, work); else cm_deref_id(cm_id_priv); return 0; out: cm_deref_id(cm_id_priv); return -EINVAL; } static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, struct cm_id_private *cm_id_priv, struct ib_cm_sidr_req_param *param) { cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, cm_form_tid(cm_id_priv)); sidr_req_msg->request_id = cm_id_priv->id.local_id; sidr_req_msg->pkey = param->path->pkey; sidr_req_msg->service_id = param->service_id; if (param->private_data && param->private_data_len) memcpy(sidr_req_msg->private_data, param->private_data, param->private_data_len); } int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, struct ib_cm_sidr_req_param *param) { struct cm_id_private *cm_id_priv; struct ib_mad_send_buf *msg; unsigned long flags; int ret; if (!param->path || (param->private_data && param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) return -EINVAL; cm_id_priv = container_of(cm_id, struct cm_id_private, id); ret = cm_init_av_by_path(param->path, param->sgid_attr, &cm_id_priv->av, cm_id_priv); if (ret) goto out; cm_id->service_id = param->service_id; cm_id->service_mask = ~cpu_to_be64(0); cm_id_priv->timeout_ms = param->timeout_ms; cm_id_priv->max_cm_retries = param->max_cm_retries; ret = cm_alloc_msg(cm_id_priv, &msg); if (ret) goto out; cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv, param); msg->timeout_ms = cm_id_priv->timeout_ms; msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT; spin_lock_irqsave(&cm_id_priv->lock, flags); if (cm_id->state == IB_CM_IDLE) ret = ib_post_send_mad(msg, NULL); else ret = -EINVAL; if (ret) { spin_unlock_irqrestore(&cm_id_priv->lock, flags); cm_free_msg(msg); goto out; } cm_id->state = IB_CM_SIDR_REQ_SENT; cm_id_priv->msg = msg; spin_unlock_irqrestore(&cm_id_priv->lock, flags); out: return ret; } EXPORT_SYMBOL(ib_send_cm_sidr_req); static void cm_format_sidr_req_event(struct cm_work *work, const struct cm_id_private *rx_cm_id, struct ib_cm_id *listen_id) { struct cm_sidr_req_msg *sidr_req_msg; struct ib_cm_sidr_req_event_param *param; sidr_req_msg = (struct cm_sidr_req_msg *) work->mad_recv_wc->recv_buf.mad; param = &work->cm_event.param.sidr_req_rcvd; param->pkey = __be16_to_cpu(sidr_req_msg->pkey); param->listen_id = listen_id; param->service_id = sidr_req_msg->service_id; param->bth_pkey = cm_get_bth_pkey(work); param->port = work->port->port_num; param->sgid_attr = rx_cm_id->av.ah_attr.grh.sgid_attr; work->cm_event.private_data = &sidr_req_msg->private_data; } static int cm_sidr_req_handler(struct cm_work *work) { struct ib_cm_id *cm_id; struct cm_id_private *cm_id_priv, *cur_cm_id_priv; struct cm_sidr_req_msg *sidr_req_msg; struct ib_wc *wc; int ret; cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL); if (IS_ERR(cm_id)) return PTR_ERR(cm_id); cm_id_priv = container_of(cm_id, struct cm_id_private, id); /* Record SGID/SLID and request ID for lookup. */ sidr_req_msg = (struct cm_sidr_req_msg *) work->mad_recv_wc->recv_buf.mad; wc = work->mad_recv_wc->wc; cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); cm_id_priv->av.dgid.global.interface_id = 0; ret = cm_init_av_for_response(work->port, work->mad_recv_wc->wc, work->mad_recv_wc->recv_buf.grh, &cm_id_priv->av); if (ret) goto out; cm_id_priv->id.remote_id = sidr_req_msg->request_id; cm_id_priv->tid = sidr_req_msg->hdr.tid; atomic_inc(&cm_id_priv->work_count); spin_lock_irq(&cm.lock); cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); if (cur_cm_id_priv) { spin_unlock_irq(&cm.lock); atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. counter[CM_SIDR_REQ_COUNTER]); goto out; /* Duplicate message. */ } cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; cur_cm_id_priv = cm_find_listen(cm_id->device, sidr_req_msg->service_id); if (!cur_cm_id_priv) { spin_unlock_irq(&cm.lock); cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED); goto out; /* No match. */ } atomic_inc(&cur_cm_id_priv->refcount); atomic_inc(&cm_id_priv->refcount); spin_unlock_irq(&cm.lock); cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler; cm_id_priv->id.context = cur_cm_id_priv->id.context; cm_id_priv->id.service_id = sidr_req_msg->service_id; cm_id_priv->id.service_mask = ~cpu_to_be64(0); cm_format_sidr_req_event(work, cm_id_priv, &cur_cm_id_priv->id); cm_process_work(cm_id_priv, work); cm_deref_id(cur_cm_id_priv); return 0; out: ib_destroy_cm_id(&cm_id_priv->id); return -EINVAL; } static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, struct cm_id_private *cm_id_priv, struct ib_cm_sidr_rep_param *param) { cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, cm_id_priv->tid); sidr_rep_msg->request_id = cm_id_priv->id.remote_id; sidr_rep_msg->status = param->status; cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num)); sidr_rep_msg->service_id = cm_id_priv->id.service_id; sidr_rep_msg->qkey = cpu_to_be32(param->qkey); if (param->info && param->info_length) memcpy(sidr_rep_msg->info, param->info, param->info_length); if (param->private_data && param->private_data_len) memcpy(sidr_rep_msg->private_data, param->private_data, param->private_data_len); } int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, struct ib_cm_sidr_rep_param *param) { struct cm_id_private *cm_id_priv; struct ib_mad_send_buf *msg; unsigned long flags; int ret; if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || (param->private_data && param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) return -EINVAL; cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); if (cm_id->state != IB_CM_SIDR_REQ_RCVD) { ret = -EINVAL; goto error; } ret = cm_alloc_msg(cm_id_priv, &msg); if (ret) goto error; cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, param); ret = ib_post_send_mad(msg, NULL); if (ret) { spin_unlock_irqrestore(&cm_id_priv->lock, flags); cm_free_msg(msg); return ret; } cm_id->state = IB_CM_IDLE; spin_unlock_irqrestore(&cm_id_priv->lock, flags); spin_lock_irqsave(&cm.lock, flags); if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node)) { rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); RB_CLEAR_NODE(&cm_id_priv->sidr_id_node); } spin_unlock_irqrestore(&cm.lock, flags); return 0; error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } EXPORT_SYMBOL(ib_send_cm_sidr_rep); static void cm_format_sidr_rep_event(struct cm_work *work, const struct cm_id_private *cm_id_priv) { struct cm_sidr_rep_msg *sidr_rep_msg; struct ib_cm_sidr_rep_event_param *param; sidr_rep_msg = (struct cm_sidr_rep_msg *) work->mad_recv_wc->recv_buf.mad; param = &work->cm_event.param.sidr_rep_rcvd; param->status = sidr_rep_msg->status; param->qkey = be32_to_cpu(sidr_rep_msg->qkey); param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg)); param->info = &sidr_rep_msg->info; param->info_len = sidr_rep_msg->info_length; param->sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr; work->cm_event.private_data = &sidr_rep_msg->private_data; } static int cm_sidr_rep_handler(struct cm_work *work) { struct cm_sidr_rep_msg *sidr_rep_msg; struct cm_id_private *cm_id_priv; sidr_rep_msg = (struct cm_sidr_rep_msg *) work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0); if (!cm_id_priv) return -EINVAL; /* Unmatched reply. */ spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { spin_unlock_irq(&cm_id_priv->lock); goto out; } cm_id_priv->id.state = IB_CM_IDLE; ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); spin_unlock_irq(&cm_id_priv->lock); cm_format_sidr_rep_event(work, cm_id_priv); cm_process_work(cm_id_priv, work); return 0; out: cm_deref_id(cm_id_priv); return -EINVAL; } static void cm_process_send_error(struct ib_mad_send_buf *msg, enum ib_wc_status wc_status) { struct cm_id_private *cm_id_priv; struct ib_cm_event cm_event; enum ib_cm_state state; int ret; memset(&cm_event, 0, sizeof cm_event); cm_id_priv = msg->context[0]; /* Discard old sends or ones without a response. */ spin_lock_irq(&cm_id_priv->lock); state = (enum ib_cm_state) (unsigned long) msg->context[1]; if (msg != cm_id_priv->msg || state != cm_id_priv->id.state) goto discard; pr_debug_ratelimited("CM: failed sending MAD in state %d. (%s)\n", state, ib_wc_status_msg(wc_status)); switch (state) { case IB_CM_REQ_SENT: case IB_CM_MRA_REQ_RCVD: cm_reset_to_idle(cm_id_priv); cm_event.event = IB_CM_REQ_ERROR; break; case IB_CM_REP_SENT: case IB_CM_MRA_REP_RCVD: cm_reset_to_idle(cm_id_priv); cm_event.event = IB_CM_REP_ERROR; break; case IB_CM_DREQ_SENT: cm_enter_timewait(cm_id_priv); cm_event.event = IB_CM_DREQ_ERROR; break; case IB_CM_SIDR_REQ_SENT: cm_id_priv->id.state = IB_CM_IDLE; cm_event.event = IB_CM_SIDR_REQ_ERROR; break; default: goto discard; } spin_unlock_irq(&cm_id_priv->lock); cm_event.param.send_status = wc_status; /* No other events can occur on the cm_id at this point. */ ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); cm_free_msg(msg); if (ret) ib_destroy_cm_id(&cm_id_priv->id); return; discard: spin_unlock_irq(&cm_id_priv->lock); cm_free_msg(msg); } static void cm_send_handler(struct ib_mad_agent *mad_agent, struct ib_mad_send_wc *mad_send_wc) { struct ib_mad_send_buf *msg = mad_send_wc->send_buf; struct cm_port *port; u16 attr_index; port = mad_agent->context; attr_index = be16_to_cpu(((struct ib_mad_hdr *) msg->mad)->attr_id) - CM_ATTR_ID_OFFSET; /* * If the send was in response to a received message (context[0] is not * set to a cm_id), and is not a REJ, then it is a send that was * manually retried. */ if (!msg->context[0] && (attr_index != CM_REJ_COUNTER)) msg->retries = 1; atomic_long_add(1 + msg->retries, &port->counter_group[CM_XMIT].counter[attr_index]); if (msg->retries) atomic_long_add(msg->retries, &port->counter_group[CM_XMIT_RETRIES]. counter[attr_index]); switch (mad_send_wc->status) { case IB_WC_SUCCESS: case IB_WC_WR_FLUSH_ERR: cm_free_msg(msg); break; default: if (msg->context[0] && msg->context[1]) cm_process_send_error(msg, mad_send_wc->status); else cm_free_msg(msg); break; } } static void cm_work_handler(struct work_struct *_work) { struct cm_work *work = container_of(_work, struct cm_work, work.work); int ret; switch (work->cm_event.event) { case IB_CM_REQ_RECEIVED: ret = cm_req_handler(work); break; case IB_CM_MRA_RECEIVED: ret = cm_mra_handler(work); break; case IB_CM_REJ_RECEIVED: ret = cm_rej_handler(work); break; case IB_CM_REP_RECEIVED: ret = cm_rep_handler(work); break; case IB_CM_RTU_RECEIVED: ret = cm_rtu_handler(work); break; case IB_CM_USER_ESTABLISHED: ret = cm_establish_handler(work); break; case IB_CM_DREQ_RECEIVED: ret = cm_dreq_handler(work); break; case IB_CM_DREP_RECEIVED: ret = cm_drep_handler(work); break; case IB_CM_SIDR_REQ_RECEIVED: ret = cm_sidr_req_handler(work); break; case IB_CM_SIDR_REP_RECEIVED: ret = cm_sidr_rep_handler(work); break; case IB_CM_LAP_RECEIVED: ret = cm_lap_handler(work); break; case IB_CM_APR_RECEIVED: ret = cm_apr_handler(work); break; case IB_CM_TIMEWAIT_EXIT: ret = cm_timewait_handler(work); break; default: pr_debug("cm_event.event: 0x%x\n", work->cm_event.event); ret = -EINVAL; break; } if (ret) cm_free_work(work); } static int cm_establish(struct ib_cm_id *cm_id) { struct cm_id_private *cm_id_priv; struct cm_work *work; unsigned long flags; int ret = 0; struct cm_device *cm_dev; cm_dev = ib_get_client_data(cm_id->device, &cm_client); if (!cm_dev) return -ENODEV; work = kmalloc(sizeof *work, GFP_ATOMIC); if (!work) return -ENOMEM; cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); switch (cm_id->state) { case IB_CM_REP_SENT: case IB_CM_MRA_REP_RCVD: cm_id->state = IB_CM_ESTABLISHED; break; case IB_CM_ESTABLISHED: ret = -EISCONN; break; default: pr_debug("%s: local_id %d, cm_id->state: %d\n", __func__, be32_to_cpu(cm_id->local_id), cm_id->state); ret = -EINVAL; break; } spin_unlock_irqrestore(&cm_id_priv->lock, flags); if (ret) { kfree(work); goto out; } /* * The CM worker thread may try to destroy the cm_id before it * can execute this work item. To prevent potential deadlock, * we need to find the cm_id once we're in the context of the * worker thread, rather than holding a reference on it. */ INIT_DELAYED_WORK(&work->work, cm_work_handler); work->local_id = cm_id->local_id; work->remote_id = cm_id->remote_id; work->mad_recv_wc = NULL; work->cm_event.event = IB_CM_USER_ESTABLISHED; /* Check if the device started its remove_one */ spin_lock_irqsave(&cm.lock, flags); if (!cm_dev->going_down) { queue_delayed_work(cm.wq, &work->work, 0); } else { kfree(work); ret = -ENODEV; } spin_unlock_irqrestore(&cm.lock, flags); out: return ret; } static int cm_migrate(struct ib_cm_id *cm_id) { struct cm_id_private *cm_id_priv; struct cm_av tmp_av; unsigned long flags; int tmp_send_port_not_ready; int ret = 0; cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); if (cm_id->state == IB_CM_ESTABLISHED && (cm_id->lap_state == IB_CM_LAP_UNINIT || cm_id->lap_state == IB_CM_LAP_IDLE)) { cm_id->lap_state = IB_CM_LAP_IDLE; /* Swap address vector */ tmp_av = cm_id_priv->av; cm_id_priv->av = cm_id_priv->alt_av; cm_id_priv->alt_av = tmp_av; /* Swap port send ready state */ tmp_send_port_not_ready = cm_id_priv->prim_send_port_not_ready; cm_id_priv->prim_send_port_not_ready = cm_id_priv->altr_send_port_not_ready; cm_id_priv->altr_send_port_not_ready = tmp_send_port_not_ready; } else ret = -EINVAL; spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event) { int ret; switch (event) { case IB_EVENT_COMM_EST: ret = cm_establish(cm_id); break; case IB_EVENT_PATH_MIG: ret = cm_migrate(cm_id); break; default: ret = -EINVAL; } return ret; } EXPORT_SYMBOL(ib_cm_notify); static void cm_recv_handler(struct ib_mad_agent *mad_agent, struct ib_mad_send_buf *send_buf, struct ib_mad_recv_wc *mad_recv_wc) { struct cm_port *port = mad_agent->context; struct cm_work *work; enum ib_cm_event_type event; bool alt_path = false; u16 attr_id; int paths = 0; int going_down = 0; switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { case CM_REQ_ATTR_ID: alt_path = cm_req_has_alt_path((struct cm_req_msg *) mad_recv_wc->recv_buf.mad); paths = 1 + (alt_path != 0); event = IB_CM_REQ_RECEIVED; break; case CM_MRA_ATTR_ID: event = IB_CM_MRA_RECEIVED; break; case CM_REJ_ATTR_ID: event = IB_CM_REJ_RECEIVED; break; case CM_REP_ATTR_ID: event = IB_CM_REP_RECEIVED; break; case CM_RTU_ATTR_ID: event = IB_CM_RTU_RECEIVED; break; case CM_DREQ_ATTR_ID: event = IB_CM_DREQ_RECEIVED; break; case CM_DREP_ATTR_ID: event = IB_CM_DREP_RECEIVED; break; case CM_SIDR_REQ_ATTR_ID: event = IB_CM_SIDR_REQ_RECEIVED; break; case CM_SIDR_REP_ATTR_ID: event = IB_CM_SIDR_REP_RECEIVED; break; case CM_LAP_ATTR_ID: paths = 1; event = IB_CM_LAP_RECEIVED; break; case CM_APR_ATTR_ID: event = IB_CM_APR_RECEIVED; break; default: ib_free_recv_mad(mad_recv_wc); return; } attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id); atomic_long_inc(&port->counter_group[CM_RECV]. counter[attr_id - CM_ATTR_ID_OFFSET]); work = kmalloc(sizeof(*work) + sizeof(struct sa_path_rec) * paths, GFP_KERNEL); if (!work) { ib_free_recv_mad(mad_recv_wc); return; } INIT_DELAYED_WORK(&work->work, cm_work_handler); work->cm_event.event = event; work->mad_recv_wc = mad_recv_wc; work->port = port; /* Check if the device started its remove_one */ spin_lock_irq(&cm.lock); if (!port->cm_dev->going_down) queue_delayed_work(cm.wq, &work->work, 0); else going_down = 1; spin_unlock_irq(&cm.lock); if (going_down) { kfree(work); ib_free_recv_mad(mad_recv_wc); } } static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, struct ib_qp_attr *qp_attr, int *qp_attr_mask) { unsigned long flags; int ret; spin_lock_irqsave(&cm_id_priv->lock, flags); switch (cm_id_priv->id.state) { case IB_CM_REQ_SENT: case IB_CM_MRA_REQ_RCVD: case IB_CM_REQ_RCVD: case IB_CM_MRA_REQ_SENT: case IB_CM_REP_RCVD: case IB_CM_MRA_REP_SENT: case IB_CM_REP_SENT: case IB_CM_MRA_REP_RCVD: case IB_CM_ESTABLISHED: *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | IB_QP_PKEY_INDEX | IB_QP_PORT; qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE; if (cm_id_priv->responder_resources) qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_ATOMIC; qp_attr->pkey_index = cm_id_priv->av.pkey_index; qp_attr->port_num = cm_id_priv->av.port->port_num; ret = 0; break; default: pr_debug("%s: local_id %d, cm_id_priv->id.state: %d\n", __func__, be32_to_cpu(cm_id_priv->id.local_id), cm_id_priv->id.state); ret = -EINVAL; break; } spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, struct ib_qp_attr *qp_attr, int *qp_attr_mask) { unsigned long flags; int ret; spin_lock_irqsave(&cm_id_priv->lock, flags); switch (cm_id_priv->id.state) { case IB_CM_REQ_RCVD: case IB_CM_MRA_REQ_SENT: case IB_CM_REP_RCVD: case IB_CM_MRA_REP_SENT: case IB_CM_REP_SENT: case IB_CM_MRA_REP_RCVD: case IB_CM_ESTABLISHED: *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | IB_QP_DEST_QPN | IB_QP_RQ_PSN; qp_attr->ah_attr = cm_id_priv->av.ah_attr; qp_attr->path_mtu = cm_id_priv->path_mtu; qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); if (cm_id_priv->qp_type == IB_QPT_RC || cm_id_priv->qp_type == IB_QPT_XRC_TGT) { *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER; qp_attr->max_dest_rd_atomic = cm_id_priv->responder_resources; qp_attr->min_rnr_timer = 0; } if (rdma_ah_get_dlid(&cm_id_priv->alt_av.ah_attr)) { *qp_attr_mask |= IB_QP_ALT_PATH; qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; } ret = 0; break; default: pr_debug("%s: local_id %d, cm_id_priv->id.state: %d\n", __func__, be32_to_cpu(cm_id_priv->id.local_id), cm_id_priv->id.state); ret = -EINVAL; break; } spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, struct ib_qp_attr *qp_attr, int *qp_attr_mask) { unsigned long flags; int ret; spin_lock_irqsave(&cm_id_priv->lock, flags); switch (cm_id_priv->id.state) { /* Allow transition to RTS before sending REP */ case IB_CM_REQ_RCVD: case IB_CM_MRA_REQ_SENT: case IB_CM_REP_RCVD: case IB_CM_MRA_REP_SENT: case IB_CM_REP_SENT: case IB_CM_MRA_REP_RCVD: case IB_CM_ESTABLISHED: if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) { *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); switch (cm_id_priv->qp_type) { case IB_QPT_RC: case IB_QPT_XRC_INI: *qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY | IB_QP_MAX_QP_RD_ATOMIC; qp_attr->retry_cnt = cm_id_priv->retry_count; qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; /* fall through */ case IB_QPT_XRC_TGT: *qp_attr_mask |= IB_QP_TIMEOUT; qp_attr->timeout = cm_id_priv->av.timeout; break; default: break; } if (rdma_ah_get_dlid(&cm_id_priv->alt_av.ah_attr)) { *qp_attr_mask |= IB_QP_PATH_MIG_STATE; qp_attr->path_mig_state = IB_MIG_REARM; } } else { *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE; qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; qp_attr->path_mig_state = IB_MIG_REARM; } ret = 0; break; default: pr_debug("%s: local_id %d, cm_id_priv->id.state: %d\n", __func__, be32_to_cpu(cm_id_priv->id.local_id), cm_id_priv->id.state); ret = -EINVAL; break; } spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, struct ib_qp_attr *qp_attr, int *qp_attr_mask) { struct cm_id_private *cm_id_priv; int ret; cm_id_priv = container_of(cm_id, struct cm_id_private, id); switch (qp_attr->qp_state) { case IB_QPS_INIT: ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); break; case IB_QPS_RTR: ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); break; case IB_QPS_RTS: ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); break; default: ret = -EINVAL; break; } return ret; } EXPORT_SYMBOL(ib_cm_init_qp_attr); static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr, char *buf) { struct cm_counter_group *group; struct cm_counter_attribute *cm_attr; group = container_of(obj, struct cm_counter_group, obj); cm_attr = container_of(attr, struct cm_counter_attribute, attr); return sprintf(buf, "%ld\n", atomic_long_read(&group->counter[cm_attr->index])); } static const struct sysfs_ops cm_counter_ops = { .show = cm_show_counter }; static struct kobj_type cm_counter_obj_type = { .sysfs_ops = &cm_counter_ops, .default_attrs = cm_counter_default_attrs }; static void cm_release_port_obj(struct kobject *obj) { struct cm_port *cm_port; cm_port = container_of(obj, struct cm_port, port_obj); kfree(cm_port); } static struct kobj_type cm_port_obj_type = { .release = cm_release_port_obj }; static char *cm_devnode(struct device *dev, umode_t *mode) { if (mode) *mode = 0666; return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); } struct class cm_class = { .owner = THIS_MODULE, .name = "infiniband_cm", .devnode = cm_devnode, }; EXPORT_SYMBOL(cm_class); static int cm_create_port_fs(struct cm_port *port) { int i, ret; ret = kobject_init_and_add(&port->port_obj, &cm_port_obj_type, &port->cm_dev->device->kobj, "%d", port->port_num); if (ret) { kfree(port); return ret; } for (i = 0; i < CM_COUNTER_GROUPS; i++) { ret = kobject_init_and_add(&port->counter_group[i].obj, &cm_counter_obj_type, &port->port_obj, "%s", counter_group_names[i]); if (ret) goto error; } return 0; error: while (i--) kobject_put(&port->counter_group[i].obj); kobject_put(&port->port_obj); return ret; } static void cm_remove_port_fs(struct cm_port *port) { int i; for (i = 0; i < CM_COUNTER_GROUPS; i++) kobject_put(&port->counter_group[i].obj); kobject_put(&port->port_obj); } static void cm_add_one(struct ib_device *ib_device) { struct cm_device *cm_dev; struct cm_port *port; struct ib_mad_reg_req reg_req = { .mgmt_class = IB_MGMT_CLASS_CM, .mgmt_class_version = IB_CM_CLASS_VERSION, }; struct ib_port_modify port_modify = { .set_port_cap_mask = IB_PORT_CM_SUP }; unsigned long flags; int ret; int count = 0; u8 i; cm_dev = kzalloc(struct_size(cm_dev, port, ib_device->phys_port_cnt), GFP_KERNEL); if (!cm_dev) return; cm_dev->ib_device = ib_device; cm_dev->ack_delay = ib_device->attrs.local_ca_ack_delay; cm_dev->going_down = 0; cm_dev->device = device_create(&cm_class, &ib_device->dev, MKDEV(0, 0), NULL, "%s", dev_name(&ib_device->dev)); if (IS_ERR(cm_dev->device)) { kfree(cm_dev); return; } set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); for (i = 1; i <= ib_device->phys_port_cnt; i++) { if (!rdma_cap_ib_cm(ib_device, i)) continue; port = kzalloc(sizeof *port, GFP_KERNEL); if (!port) goto error1; cm_dev->port[i-1] = port; port->cm_dev = cm_dev; port->port_num = i; INIT_LIST_HEAD(&port->cm_priv_prim_list); INIT_LIST_HEAD(&port->cm_priv_altr_list); ret = cm_create_port_fs(port); if (ret) goto error1; port->mad_agent = ib_register_mad_agent(ib_device, i, IB_QPT_GSI, ®_req, 0, cm_send_handler, cm_recv_handler, port, 0); if (IS_ERR(port->mad_agent)) goto error2; ret = ib_modify_port(ib_device, i, 0, &port_modify); if (ret) goto error3; count++; } if (!count) goto free; ib_set_client_data(ib_device, &cm_client, cm_dev); write_lock_irqsave(&cm.device_lock, flags); list_add_tail(&cm_dev->list, &cm.device_list); write_unlock_irqrestore(&cm.device_lock, flags); return; error3: ib_unregister_mad_agent(port->mad_agent); error2: cm_remove_port_fs(port); error1: port_modify.set_port_cap_mask = 0; port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; while (--i) { if (!rdma_cap_ib_cm(ib_device, i)) continue; port = cm_dev->port[i-1]; ib_modify_port(ib_device, port->port_num, 0, &port_modify); ib_unregister_mad_agent(port->mad_agent); cm_remove_port_fs(port); } free: device_unregister(cm_dev->device); kfree(cm_dev); } static void cm_remove_one(struct ib_device *ib_device, void *client_data) { struct cm_device *cm_dev = client_data; struct cm_port *port; struct cm_id_private *cm_id_priv; struct ib_mad_agent *cur_mad_agent; struct ib_port_modify port_modify = { .clr_port_cap_mask = IB_PORT_CM_SUP }; unsigned long flags; int i; if (!cm_dev) return; write_lock_irqsave(&cm.device_lock, flags); list_del(&cm_dev->list); write_unlock_irqrestore(&cm.device_lock, flags); spin_lock_irq(&cm.lock); cm_dev->going_down = 1; spin_unlock_irq(&cm.lock); for (i = 1; i <= ib_device->phys_port_cnt; i++) { if (!rdma_cap_ib_cm(ib_device, i)) continue; port = cm_dev->port[i-1]; ib_modify_port(ib_device, port->port_num, 0, &port_modify); /* Mark all the cm_id's as not valid */ spin_lock_irq(&cm.lock); list_for_each_entry(cm_id_priv, &port->cm_priv_altr_list, altr_list) cm_id_priv->altr_send_port_not_ready = 1; list_for_each_entry(cm_id_priv, &port->cm_priv_prim_list, prim_list) cm_id_priv->prim_send_port_not_ready = 1; spin_unlock_irq(&cm.lock); /* * We flush the queue here after the going_down set, this * verify that no new works will be queued in the recv handler, * after that we can call the unregister_mad_agent */ flush_workqueue(cm.wq); spin_lock_irq(&cm.state_lock); cur_mad_agent = port->mad_agent; port->mad_agent = NULL; spin_unlock_irq(&cm.state_lock); ib_unregister_mad_agent(cur_mad_agent); cm_remove_port_fs(port); } device_unregister(cm_dev->device); kfree(cm_dev); } static int __init ib_cm_init(void) { int ret; memset(&cm, 0, sizeof cm); INIT_LIST_HEAD(&cm.device_list); rwlock_init(&cm.device_lock); spin_lock_init(&cm.lock); spin_lock_init(&cm.state_lock); cm.listen_service_table = RB_ROOT; cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); cm.remote_id_table = RB_ROOT; cm.remote_qp_table = RB_ROOT; cm.remote_sidr_table = RB_ROOT; idr_init(&cm.local_id_table); get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); INIT_LIST_HEAD(&cm.timewait_list); ret = class_register(&cm_class); if (ret) { ret = -ENOMEM; goto error1; } cm.wq = alloc_workqueue("ib_cm", 0, 1); if (!cm.wq) { ret = -ENOMEM; goto error2; } ret = ib_register_client(&cm_client); if (ret) goto error3; return 0; error3: destroy_workqueue(cm.wq); error2: class_unregister(&cm_class); error1: idr_destroy(&cm.local_id_table); return ret; } static void __exit ib_cm_cleanup(void) { struct cm_timewait_info *timewait_info, *tmp; spin_lock_irq(&cm.lock); list_for_each_entry(timewait_info, &cm.timewait_list, list) cancel_delayed_work(&timewait_info->work.work); spin_unlock_irq(&cm.lock); ib_unregister_client(&cm_client); destroy_workqueue(cm.wq); list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { list_del(&timewait_info->list); kfree(timewait_info); } class_unregister(&cm_class); idr_destroy(&cm.local_id_table); } module_init(ib_cm_init); module_exit(ib_cm_cleanup);
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