| // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB |
| /* |
| * 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. |
| * Copyright (c) 2019, Mellanox Technologies inc. All rights reserved. |
| */ |
| |
| #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" |
| #include "core_priv.h" |
| #include "cm_trace.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", |
| [IB_CM_REJ_VENDOR_OPTION_NOT_SUPPORTED] = |
| "vendor option is not supported", |
| }; |
| |
| 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); |
| |
| struct cm_id_private; |
| struct cm_work; |
| static int cm_add_one(struct ib_device *device); |
| static void cm_remove_one(struct ib_device *device, void *client_data); |
| static void cm_process_work(struct cm_id_private *cm_id_priv, |
| struct cm_work *work); |
| static int cm_send_sidr_rep_locked(struct cm_id_private *cm_id_priv, |
| struct ib_cm_sidr_rep_param *param); |
| static int cm_send_dreq_locked(struct cm_id_private *cm_id_priv, |
| const void *private_data, u8 private_data_len); |
| static int cm_send_drep_locked(struct cm_id_private *cm_id_priv, |
| void *private_data, u8 private_data_len); |
| static int cm_send_rej_locked(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); |
| |
| 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 xarray local_id_table; |
| u32 local_id_next; |
| __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; |
| 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; |
| u8 ack_delay; |
| int going_down; |
| struct cm_port *port[]; |
| }; |
| |
| 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[]; |
| }; |
| |
| struct cm_timewait_info { |
| struct cm_work work; |
| 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; |
| refcount_t refcount; |
| /* Number of clients sharing this ib_cm_id. Only valid for listeners. |
| * Protected by the cm.lock spinlock. */ |
| int listen_sharecount; |
| struct rcu_head rcu; |
| |
| 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 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; |
| |
| struct rdma_ucm_ece ece; |
| }; |
| |
| static void cm_work_handler(struct work_struct *work); |
| |
| static inline void cm_deref_id(struct cm_id_private *cm_id_priv) |
| { |
| if (refcount_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; |
| |
| refcount_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 void add_cm_id_to_port_list(struct cm_id_private *cm_id_priv, |
| struct cm_av *av, struct cm_port *port) |
| { |
| unsigned long flags; |
| |
| 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 |
| WARN_ON(true); |
| spin_unlock_irqrestore(&cm.lock, flags); |
| } |
| |
| 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; |
| add_cm_id_to_port_list(cm_id_priv, av, port); |
| rdma_move_ah_attr(&av->ah_attr, &new_ah_attr); |
| return 0; |
| } |
| |
| static u32 cm_local_id(__be32 local_id) |
| { |
| return (__force u32) (local_id ^ cm.random_id_operand); |
| } |
| |
| static struct cm_id_private *cm_acquire_id(__be32 local_id, __be32 remote_id) |
| { |
| struct cm_id_private *cm_id_priv; |
| |
| rcu_read_lock(); |
| cm_id_priv = xa_load(&cm.local_id_table, cm_local_id(local_id)); |
| if (!cm_id_priv || cm_id_priv->id.remote_id != remote_id || |
| !refcount_inc_not_zero(&cm_id_priv->refcount)) |
| cm_id_priv = NULL; |
| rcu_read_unlock(); |
| |
| 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; |
| } |
| |
| /* |
| * Inserts a new cm_id_priv into the listen_service_table. Returns cm_id_priv |
| * if the new ID was inserted, NULL if it could not be inserted due to a |
| * collision, or the existing cm_id_priv ready for shared usage. |
| */ |
| static struct cm_id_private *cm_insert_listen(struct cm_id_private *cm_id_priv, |
| ib_cm_handler shared_handler) |
| { |
| 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; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&cm.lock, flags); |
| 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)) { |
| /* |
| * Sharing an ib_cm_id with different handlers is not |
| * supported |
| */ |
| if (cur_cm_id_priv->id.cm_handler != shared_handler || |
| cur_cm_id_priv->id.context || |
| WARN_ON(!cur_cm_id_priv->id.cm_handler)) { |
| spin_unlock_irqrestore(&cm.lock, flags); |
| return NULL; |
| } |
| refcount_inc(&cur_cm_id_priv->refcount); |
| cur_cm_id_priv->listen_sharecount++; |
| spin_unlock_irqrestore(&cm.lock, flags); |
| 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; |
| } |
| cm_id_priv->listen_sharecount++; |
| rb_link_node(&cm_id_priv->service_node, parent, link); |
| rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); |
| spin_unlock_irqrestore(&cm.lock, flags); |
| return cm_id_priv; |
| } |
| |
| 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)) { |
| refcount_inc(&cm_id_priv->refcount); |
| 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_id_private *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; |
| struct cm_id_private *res = NULL; |
| |
| spin_lock_irq(&cm.lock); |
| 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 { |
| res = cm_acquire_id(timewait_info->work.local_id, |
| timewait_info->work.remote_id); |
| break; |
| } |
| } |
| spin_unlock_irq(&cm.lock); |
| return res; |
| } |
| |
| 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 struct cm_id_private *cm_alloc_id_priv(struct ib_device *device, |
| ib_cm_handler cm_handler, |
| void *context) |
| { |
| struct cm_id_private *cm_id_priv; |
| u32 id; |
| 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; |
| |
| RB_CLEAR_NODE(&cm_id_priv->service_node); |
| RB_CLEAR_NODE(&cm_id_priv->sidr_id_node); |
| 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); |
| refcount_set(&cm_id_priv->refcount, 1); |
| |
| ret = xa_alloc_cyclic(&cm.local_id_table, &id, NULL, xa_limit_32b, |
| &cm.local_id_next, GFP_KERNEL); |
| if (ret < 0) |
| goto error; |
| cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand; |
| |
| return cm_id_priv; |
| |
| error: |
| kfree(cm_id_priv); |
| return ERR_PTR(ret); |
| } |
| |
| /* |
| * Make the ID visible to the MAD handlers and other threads that use the |
| * xarray. |
| */ |
| static void cm_finalize_id(struct cm_id_private *cm_id_priv) |
| { |
| xa_store(&cm.local_id_table, cm_local_id(cm_id_priv->id.local_id), |
| cm_id_priv, GFP_ATOMIC); |
| } |
| |
| 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; |
| |
| cm_id_priv = cm_alloc_id_priv(device, cm_handler, context); |
| if (IS_ERR(cm_id_priv)) |
| return ERR_CAST(cm_id_priv); |
| |
| cm_finalize_id(cm_id_priv); |
| return &cm_id_priv->id; |
| } |
| 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 void cm_queue_work_unlock(struct cm_id_private *cm_id_priv, |
| struct cm_work *work) |
| __releases(&cm_id_priv->lock) |
| { |
| bool immediate; |
| |
| /* |
| * To deliver the event to the user callback we have the drop the |
| * spinlock, however, we need to ensure that the user callback is single |
| * threaded and receives events in the temporal order. If there are |
| * already events being processed then thread new events onto a list, |
| * the thread currently processing will pick them up. |
| */ |
| immediate = atomic_inc_and_test(&cm_id_priv->work_count); |
| if (!immediate) { |
| list_add_tail(&work->list, &cm_id_priv->work_list); |
| /* |
| * This routine always consumes incoming reference. Once queued |
| * to the work_list then a reference is held by the thread |
| * currently running cm_process_work() and this reference is not |
| * needed. |
| */ |
| cm_deref_id(cm_id_priv); |
| } |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| if (immediate) |
| cm_process_work(cm_id_priv, 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_remove_remote(struct cm_id_private *cm_id_priv) |
| { |
| struct cm_timewait_info *timewait_info = cm_id_priv->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; |
| |
| lockdep_assert_held(&cm_id_priv->lock); |
| |
| cm_dev = ib_get_client_data(cm_id_priv->id.device, &cm_client); |
| if (!cm_dev) |
| return; |
| |
| spin_lock_irqsave(&cm.lock, flags); |
| cm_remove_remote(cm_id_priv); |
| 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); |
| |
| /* |
| * The timewait_info is converted into a work and gets freed during |
| * cm_free_work() in cm_timewait_handler(). |
| */ |
| BUILD_BUG_ON(offsetof(struct cm_timewait_info, work) != 0); |
| cm_id_priv->timewait_info = NULL; |
| } |
| |
| static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) |
| { |
| unsigned long flags; |
| |
| lockdep_assert_held(&cm_id_priv->lock); |
| |
| cm_id_priv->id.state = IB_CM_IDLE; |
| if (cm_id_priv->timewait_info) { |
| spin_lock_irqsave(&cm.lock, flags); |
| cm_remove_remote(cm_id_priv); |
| 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); |
| spin_lock_irq(&cm_id_priv->lock); |
| retest: |
| switch (cm_id->state) { |
| case IB_CM_LISTEN: |
| spin_lock(&cm.lock); |
| if (--cm_id_priv->listen_sharecount > 0) { |
| /* The id is still shared. */ |
| WARN_ON(refcount_read(&cm_id_priv->refcount) == 1); |
| spin_unlock(&cm.lock); |
| spin_unlock_irq(&cm_id_priv->lock); |
| cm_deref_id(cm_id_priv); |
| return; |
| } |
| cm_id->state = IB_CM_IDLE; |
| rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); |
| RB_CLEAR_NODE(&cm_id_priv->service_node); |
| spin_unlock(&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); |
| break; |
| case IB_CM_SIDR_REQ_RCVD: |
| cm_send_sidr_rep_locked(cm_id_priv, |
| &(struct ib_cm_sidr_rep_param){ |
| .status = IB_SIDR_REJECT }); |
| /* cm_send_sidr_rep_locked will not move to IDLE if it fails */ |
| cm_id->state = IB_CM_IDLE; |
| 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); |
| cm_send_rej_locked(cm_id_priv, 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); |
| } else { |
| cm_send_rej_locked(cm_id_priv, |
| 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); |
| cm_send_rej_locked(cm_id_priv, IB_CM_REJ_CONSUMER_DEFINED, NULL, |
| 0, NULL, 0); |
| goto retest; |
| case IB_CM_MRA_REQ_SENT: |
| case IB_CM_REP_RCVD: |
| case IB_CM_MRA_REP_SENT: |
| cm_send_rej_locked(cm_id_priv, IB_CM_REJ_CONSUMER_DEFINED, NULL, |
| 0, NULL, 0); |
| break; |
| case IB_CM_ESTABLISHED: |
| if (cm_id_priv->qp_type == IB_QPT_XRC_TGT) { |
| cm_id->state = IB_CM_IDLE; |
| break; |
| } |
| cm_send_dreq_locked(cm_id_priv, 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); |
| goto retest; |
| case IB_CM_DREQ_RCVD: |
| cm_send_drep_locked(cm_id_priv, NULL, 0); |
| WARN_ON(cm_id->state != IB_CM_TIMEWAIT); |
| goto retest; |
| case IB_CM_TIMEWAIT: |
| /* |
| * The cm_acquire_id in cm_timewait_handler will stop working |
| * once we do xa_erase below, so just move to idle here for |
| * consistency. |
| */ |
| cm_id->state = IB_CM_IDLE; |
| break; |
| case IB_CM_IDLE: |
| break; |
| } |
| WARN_ON(cm_id->state != IB_CM_IDLE); |
| |
| spin_lock(&cm.lock); |
| /* Required for cleanup paths related cm_req_handler() */ |
| if (cm_id_priv->timewait_info) { |
| cm_remove_remote(cm_id_priv); |
| kfree(cm_id_priv->timewait_info); |
| cm_id_priv->timewait_info = NULL; |
| } |
| 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); |
| WARN_ON(cm_id_priv->listen_sharecount); |
| WARN_ON(!RB_EMPTY_NODE(&cm_id_priv->service_node)); |
| if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node)) |
| rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); |
| spin_unlock(&cm.lock); |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| xa_erase(&cm.local_id_table, cm_local_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_rcu(cm_id_priv, rcu); |
| } |
| |
| void ib_destroy_cm_id(struct ib_cm_id *cm_id) |
| { |
| cm_destroy_id(cm_id, 0); |
| } |
| EXPORT_SYMBOL(ib_destroy_cm_id); |
| |
| static int cm_init_listen(struct cm_id_private *cm_id_priv, __be64 service_id, |
| __be64 service_mask) |
| { |
| 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; |
| |
| if (service_id == IB_CM_ASSIGN_SERVICE_ID) { |
| cm_id_priv->id.service_id = cpu_to_be64(cm.listen_service_id++); |
| cm_id_priv->id.service_mask = ~cpu_to_be64(0); |
| } else { |
| cm_id_priv->id.service_id = service_id; |
| cm_id_priv->id.service_mask = service_mask; |
| } |
| return 0; |
| } |
| |
| /** |
| * 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. |
| */ |
| int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask) |
| { |
| struct cm_id_private *cm_id_priv = |
| container_of(cm_id, struct cm_id_private, id); |
| unsigned long flags; |
| int ret; |
| |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| if (cm_id_priv->id.state != IB_CM_IDLE) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = cm_init_listen(cm_id_priv, service_id, service_mask); |
| if (ret) |
| goto out; |
| |
| if (!cm_insert_listen(cm_id_priv, NULL)) { |
| ret = -EBUSY; |
| goto out; |
| } |
| |
| cm_id_priv->id.state = IB_CM_LISTEN; |
| ret = 0; |
| |
| out: |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| return ret; |
| } |
| EXPORT_SYMBOL(ib_cm_listen); |
| |
| /** |
| * ib_cm_insert_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 *listen_id_priv; |
| struct cm_id_private *cm_id_priv; |
| int err = 0; |
| |
| /* Create an ID in advance, since the creation may sleep */ |
| cm_id_priv = cm_alloc_id_priv(device, cm_handler, NULL); |
| if (IS_ERR(cm_id_priv)) |
| return ERR_CAST(cm_id_priv); |
| |
| err = cm_init_listen(cm_id_priv, service_id, 0); |
| if (err) |
| return ERR_PTR(err); |
| |
| spin_lock_irq(&cm_id_priv->lock); |
| listen_id_priv = cm_insert_listen(cm_id_priv, cm_handler); |
| if (listen_id_priv != cm_id_priv) { |
| spin_unlock_irq(&cm_id_priv->lock); |
| ib_destroy_cm_id(&cm_id_priv->id); |
| if (!listen_id_priv) |
| return ERR_PTR(-EINVAL); |
| return &listen_id_priv->id; |
| } |
| cm_id_priv->id.state = IB_CM_LISTEN; |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| /* |
| * A listen ID does not need to be in the xarray since it does not |
| * receive mads, is not placed in the remote_id or remote_qpn rbtree, |
| * and does not enter timewait. |
| */ |
| |
| return &cm_id_priv->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_mad_ece_hdr(struct ib_mad_hdr *hdr, __be16 attr_id, |
| __be64 tid, u32 attr_mod) |
| { |
| cm_format_mad_hdr(hdr, attr_id, tid); |
| hdr->attr_mod = cpu_to_be32(attr_mod); |
| } |
| |
| 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_ece_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, |
| cm_form_tid(cm_id_priv), param->ece.attr_mod); |
| |
| IBA_SET(CM_REQ_LOCAL_COMM_ID, req_msg, |
| be32_to_cpu(cm_id_priv->id.local_id)); |
| IBA_SET(CM_REQ_SERVICE_ID, req_msg, be64_to_cpu(param->service_id)); |
| IBA_SET(CM_REQ_LOCAL_CA_GUID, req_msg, |
| be64_to_cpu(cm_id_priv->id.device->node_guid)); |
| IBA_SET(CM_REQ_LOCAL_QPN, req_msg, param->qp_num); |
| IBA_SET(CM_REQ_INITIATOR_DEPTH, req_msg, param->initiator_depth); |
| IBA_SET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT, req_msg, |
| param->remote_cm_response_timeout); |
| cm_req_set_qp_type(req_msg, param->qp_type); |
| IBA_SET(CM_REQ_END_TO_END_FLOW_CONTROL, req_msg, param->flow_control); |
| IBA_SET(CM_REQ_STARTING_PSN, req_msg, param->starting_psn); |
| IBA_SET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg, |
| param->local_cm_response_timeout); |
| IBA_SET(CM_REQ_PARTITION_KEY, req_msg, |
| be16_to_cpu(param->primary_path->pkey)); |
| IBA_SET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg, |
| param->primary_path->mtu); |
| IBA_SET(CM_REQ_MAX_CM_RETRIES, req_msg, param->max_cm_retries); |
| |
| if (param->qp_type != IB_QPT_XRC_INI) { |
| IBA_SET(CM_REQ_RESPONDER_RESOURCES, req_msg, |
| param->responder_resources); |
| IBA_SET(CM_REQ_RETRY_COUNT, req_msg, param->retry_count); |
| IBA_SET(CM_REQ_RNR_RETRY_COUNT, req_msg, |
| param->rnr_retry_count); |
| IBA_SET(CM_REQ_SRQ, req_msg, param->srq); |
| } |
| |
| *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg) = |
| pri_path->sgid; |
| *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg) = |
| pri_path->dgid; |
| if (pri_ext) { |
| IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg) |
| ->global.interface_id = |
| OPA_MAKE_ID(be32_to_cpu(pri_path->opa.slid)); |
| IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg) |
| ->global.interface_id = |
| OPA_MAKE_ID(be32_to_cpu(pri_path->opa.dlid)); |
| } |
| if (pri_path->hop_limit <= 1) { |
| IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg, |
| be16_to_cpu(pri_ext ? 0 : |
| htons(ntohl(sa_path_get_slid( |
| pri_path))))); |
| IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg, |
| be16_to_cpu(pri_ext ? 0 : |
| htons(ntohl(sa_path_get_dlid( |
| pri_path))))); |
| } else { |
| /* Work-around until there's a way to obtain remote LID info */ |
| IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg, |
| be16_to_cpu(IB_LID_PERMISSIVE)); |
| IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg, |
| be16_to_cpu(IB_LID_PERMISSIVE)); |
| } |
| IBA_SET(CM_REQ_PRIMARY_FLOW_LABEL, req_msg, |
| be32_to_cpu(pri_path->flow_label)); |
| IBA_SET(CM_REQ_PRIMARY_PACKET_RATE, req_msg, pri_path->rate); |
| IBA_SET(CM_REQ_PRIMARY_TRAFFIC_CLASS, req_msg, pri_path->traffic_class); |
| IBA_SET(CM_REQ_PRIMARY_HOP_LIMIT, req_msg, pri_path->hop_limit); |
| IBA_SET(CM_REQ_PRIMARY_SL, req_msg, pri_path->sl); |
| IBA_SET(CM_REQ_PRIMARY_SUBNET_LOCAL, req_msg, |
| (pri_path->hop_limit <= 1)); |
| IBA_SET(CM_REQ_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); |
| |
| *IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg) = |
| alt_path->sgid; |
| *IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg) = |
| alt_path->dgid; |
| if (alt_ext) { |
| IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID, |
| req_msg) |
| ->global.interface_id = |
| OPA_MAKE_ID(be32_to_cpu(alt_path->opa.slid)); |
| IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_REMOTE_PORT_GID, |
| req_msg) |
| ->global.interface_id = |
| OPA_MAKE_ID(be32_to_cpu(alt_path->opa.dlid)); |
| } |
| if (alt_path->hop_limit <= 1) { |
| IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg, |
| be16_to_cpu( |
| alt_ext ? 0 : |
| htons(ntohl(sa_path_get_slid( |
| alt_path))))); |
| IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg, |
| be16_to_cpu( |
| alt_ext ? 0 : |
| htons(ntohl(sa_path_get_dlid( |
| alt_path))))); |
| } else { |
| IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg, |
| be16_to_cpu(IB_LID_PERMISSIVE)); |
| IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg, |
| be16_to_cpu(IB_LID_PERMISSIVE)); |
| } |
| IBA_SET(CM_REQ_ALTERNATE_FLOW_LABEL, req_msg, |
| be32_to_cpu(alt_path->flow_label)); |
| IBA_SET(CM_REQ_ALTERNATE_PACKET_RATE, req_msg, alt_path->rate); |
| IBA_SET(CM_REQ_ALTERNATE_TRAFFIC_CLASS, req_msg, |
| alt_path->traffic_class); |
| IBA_SET(CM_REQ_ALTERNATE_HOP_LIMIT, req_msg, |
| alt_path->hop_limit); |
| IBA_SET(CM_REQ_ALTERNATE_SL, req_msg, alt_path->sl); |
| IBA_SET(CM_REQ_ALTERNATE_SUBNET_LOCAL, req_msg, |
| (alt_path->hop_limit <= 1)); |
| IBA_SET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT, req_msg, |
| cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, |
| alt_path->packet_life_time)); |
| } |
| IBA_SET(CM_REQ_VENDOR_ID, req_msg, param->ece.vendor_id); |
| |
| if (param->private_data && param->private_data_len) |
| IBA_SET_MEM(CM_REQ_PRIVATE_DATA, req_msg, param->private_data, |
| param->private_data_len); |
| } |
| |
| static int cm_validate_req_param(struct ib_cm_req_param *param) |
| { |
| 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 || WARN_ON(cm_id_priv->timewait_info)) { |
| 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); |
| cm_id_priv->timewait_info = NULL; |
| 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 out; |
| 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 out; |
| } |
| 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 out; |
| |
| 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 = cpu_to_be32(IBA_GET(CM_REQ_LOCAL_QPN, req_msg)); |
| cm_id_priv->rq_psn = cpu_to_be32(IBA_GET(CM_REQ_STARTING_PSN, req_msg)); |
| |
| trace_icm_send_req(&cm_id_priv->id); |
| 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); |
| 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); |
| IBA_SET(CM_REJ_REMOTE_COMM_ID, rej_msg, |
| IBA_GET(CM_REJ_LOCAL_COMM_ID, rcv_msg)); |
| IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, |
| IBA_GET(CM_REJ_REMOTE_COMM_ID, rcv_msg)); |
| IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, msg_rejected); |
| IBA_SET(CM_REJ_REASON, rej_msg, reason); |
| |
| if (ari && ari_length) { |
| IBA_SET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg, ari_length); |
| IBA_SET_MEM(CM_REJ_ARI, rej_msg, ari, ari_length); |
| } |
| |
| trace_icm_issue_rej( |
| IBA_GET(CM_REJ_LOCAL_COMM_ID, rcv_msg), |
| IBA_GET(CM_REJ_REMOTE_COMM_ID, rcv_msg)); |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) |
| cm_free_msg(msg); |
| |
| return ret; |
| } |
| |
| static bool cm_req_has_alt_path(struct cm_req_msg *req_msg) |
| { |
| return ((cpu_to_be16( |
| IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg))) || |
| (ib_is_opa_gid(IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID, |
| req_msg)))); |
| } |
| |
| 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, |
| IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID, |
| req_msg)); |
| sa_path_set_slid(primary_path, |
| IBA_GET(CM_REQ_PRIMARY_REMOTE_PORT_LID, |
| req_msg)); |
| } else { |
| lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( |
| CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg)); |
| sa_path_set_dlid(primary_path, lid); |
| |
| lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( |
| CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg)); |
| 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, |
| IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, |
| req_msg)); |
| sa_path_set_slid(alt_path, |
| IBA_GET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, |
| req_msg)); |
| } else { |
| lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( |
| CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg)); |
| sa_path_set_dlid(alt_path, lid); |
| |
| lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( |
| CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg)); |
| 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 = |
| *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg); |
| primary_path->sgid = |
| *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg); |
| primary_path->flow_label = |
| cpu_to_be32(IBA_GET(CM_REQ_PRIMARY_FLOW_LABEL, req_msg)); |
| primary_path->hop_limit = IBA_GET(CM_REQ_PRIMARY_HOP_LIMIT, req_msg); |
| primary_path->traffic_class = |
| IBA_GET(CM_REQ_PRIMARY_TRAFFIC_CLASS, req_msg); |
| primary_path->reversible = 1; |
| primary_path->pkey = |
| cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg)); |
| primary_path->sl = IBA_GET(CM_REQ_PRIMARY_SL, req_msg); |
| primary_path->mtu_selector = IB_SA_EQ; |
| primary_path->mtu = IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg); |
| primary_path->rate_selector = IB_SA_EQ; |
| primary_path->rate = IBA_GET(CM_REQ_PRIMARY_PACKET_RATE, req_msg); |
| primary_path->packet_life_time_selector = IB_SA_EQ; |
| primary_path->packet_life_time = |
| IBA_GET(CM_REQ_PRIMARY_LOCAL_ACK_TIMEOUT, req_msg); |
| primary_path->packet_life_time -= (primary_path->packet_life_time > 0); |
| primary_path->service_id = |
| cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg)); |
| if (sa_path_is_roce(primary_path)) |
| primary_path->roce.route_resolved = false; |
| |
| if (cm_req_has_alt_path(req_msg)) { |
| alt_path->dgid = *IBA_GET_MEM_PTR( |
| CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg); |
| alt_path->sgid = *IBA_GET_MEM_PTR( |
| CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg); |
| alt_path->flow_label = cpu_to_be32( |
| IBA_GET(CM_REQ_ALTERNATE_FLOW_LABEL, req_msg)); |
| alt_path->hop_limit = |
| IBA_GET(CM_REQ_ALTERNATE_HOP_LIMIT, req_msg); |
| alt_path->traffic_class = |
| IBA_GET(CM_REQ_ALTERNATE_TRAFFIC_CLASS, req_msg); |
| alt_path->reversible = 1; |
| alt_path->pkey = |
| cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg)); |
| alt_path->sl = IBA_GET(CM_REQ_ALTERNATE_SL, req_msg); |
| alt_path->mtu_selector = IB_SA_EQ; |
| alt_path->mtu = |
| IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg); |
| alt_path->rate_selector = IB_SA_EQ; |
| alt_path->rate = IBA_GET(CM_REQ_ALTERNATE_PACKET_RATE, req_msg); |
| alt_path->packet_life_time_selector = IB_SA_EQ; |
| alt_path->packet_life_time = |
| IBA_GET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT, req_msg); |
| alt_path->packet_life_time -= (alt_path->packet_life_time > 0); |
| alt_path->service_id = |
| cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg)); |
| |
| 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; |
| } |
| |
| /** |
| * cm_opa_to_ib_sgid - 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 = |
| cpu_to_be64(IBA_GET(CM_REQ_LOCAL_CA_GUID, req_msg)); |
| param->remote_qkey = IBA_GET(CM_REQ_LOCAL_Q_KEY, req_msg); |
| param->remote_qpn = IBA_GET(CM_REQ_LOCAL_QPN, req_msg); |
| param->qp_type = cm_req_get_qp_type(req_msg); |
| param->starting_psn = IBA_GET(CM_REQ_STARTING_PSN, req_msg); |
| param->responder_resources = IBA_GET(CM_REQ_INITIATOR_DEPTH, req_msg); |
| param->initiator_depth = IBA_GET(CM_REQ_RESPONDER_RESOURCES, req_msg); |
| param->local_cm_response_timeout = |
| IBA_GET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT, req_msg); |
| param->flow_control = IBA_GET(CM_REQ_END_TO_END_FLOW_CONTROL, req_msg); |
| param->remote_cm_response_timeout = |
| IBA_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg); |
| param->retry_count = IBA_GET(CM_REQ_RETRY_COUNT, req_msg); |
| param->rnr_retry_count = IBA_GET(CM_REQ_RNR_RETRY_COUNT, req_msg); |
| param->srq = IBA_GET(CM_REQ_SRQ, req_msg); |
| param->ppath_sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr; |
| param->ece.vendor_id = IBA_GET(CM_REQ_VENDOR_ID, req_msg); |
| param->ece.attr_mod = be32_to_cpu(req_msg->hdr.attr_mod); |
| |
| work->cm_event.private_data = |
| IBA_GET_MEM_PTR(CM_REQ_PRIVATE_DATA, req_msg); |
| } |
| |
| 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); |
| IBA_SET(CM_MRA_MESSAGE_MRAED, mra_msg, msg_mraed); |
| IBA_SET(CM_MRA_LOCAL_COMM_ID, mra_msg, |
| be32_to_cpu(cm_id_priv->id.local_id)); |
| IBA_SET(CM_MRA_REMOTE_COMM_ID, mra_msg, |
| be32_to_cpu(cm_id_priv->id.remote_id)); |
| IBA_SET(CM_MRA_SERVICE_TIMEOUT, mra_msg, service_timeout); |
| |
| if (private_data && private_data_len) |
| IBA_SET_MEM(CM_MRA_PRIVATE_DATA, mra_msg, 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, enum ib_cm_state state) |
| { |
| lockdep_assert_held(&cm_id_priv->lock); |
| |
| cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); |
| IBA_SET(CM_REJ_REMOTE_COMM_ID, rej_msg, |
| be32_to_cpu(cm_id_priv->id.remote_id)); |
| |
| switch (state) { |
| case IB_CM_REQ_RCVD: |
| IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, be32_to_cpu(0)); |
| IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REQ); |
| break; |
| case IB_CM_MRA_REQ_SENT: |
| IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, |
| be32_to_cpu(cm_id_priv->id.local_id)); |
| IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REQ); |
| break; |
| case IB_CM_REP_RCVD: |
| case IB_CM_MRA_REP_SENT: |
| IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, |
| be32_to_cpu(cm_id_priv->id.local_id)); |
| IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REP); |
| break; |
| default: |
| IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, |
| be32_to_cpu(cm_id_priv->id.local_id)); |
| IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, |
| CM_MSG_RESPONSE_OTHER); |
| break; |
| } |
| |
| IBA_SET(CM_REJ_REASON, rej_msg, reason); |
| if (ari && ari_length) { |
| IBA_SET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg, ari_length); |
| IBA_SET_MEM(CM_REJ_ARI, rej_msg, ari, ari_length); |
| } |
| |
| if (private_data && private_data_len) |
| IBA_SET_MEM(CM_REJ_PRIVATE_DATA, rej_msg, 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. */ |
| spin_lock_irq(&cm_id_priv->lock); |
| if (cm_id_priv->id.state == IB_CM_REQ_RCVD) { |
| spin_unlock_irq(&cm_id_priv->lock); |
| return; |
| } |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| 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, |
| IB_CM_TIMEWAIT); |
| break; |
| default: |
| goto unlock; |
| } |
| spin_unlock_irq(&cm_id_priv->lock); |
| |
| trace_icm_send_dup_req(&cm_id_priv->id); |
| 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; |
| |
| 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_acquire_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_remove_remote(cm_id_priv); |
| cur_cm_id_priv = cm_acquire_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) { |
| ib_send_cm_dreq(&cur_cm_id_priv->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, |
| cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg))); |
| if (!listen_cm_id_priv) { |
| cm_remove_remote(cm_id_priv); |
| 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); |
| return NULL; |
| } |
| spin_unlock_irq(&cm.lock); |
| 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 (!IBA_GET(CM_REQ_PRIMARY_SUBNET_LOCAL, req_msg)) { |
| if (cpu_to_be16(IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID, |
| req_msg)) == IB_LID_PERMISSIVE) { |
| IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg, |
| be16_to_cpu(ib_lid_be16(wc->slid))); |
| IBA_SET(CM_REQ_PRIMARY_SL, req_msg, wc->sl); |
| } |
| |
| if (cpu_to_be16(IBA_GET(CM_REQ_PRIMARY_REMOTE_PORT_LID, |
| req_msg)) == IB_LID_PERMISSIVE) |
| IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg, |
| wc->dlid_path_bits); |
| } |
| |
| if (!IBA_GET(CM_REQ_ALTERNATE_SUBNET_LOCAL, req_msg)) { |
| if (cpu_to_be16(IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, |
| req_msg)) == IB_LID_PERMISSIVE) { |
| IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg, |
| be16_to_cpu(ib_lid_be16(wc->slid))); |
| IBA_SET(CM_REQ_ALTERNATE_SL, req_msg, wc->sl); |
| } |
| |
| if (cpu_to_be16(IBA_GET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, |
| req_msg)) == IB_LID_PERMISSIVE) |
| IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg, |
| wc->dlid_path_bits); |
| } |
| } |
| |
| static int cm_req_handler(struct cm_work *work) |
| { |
| 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_priv = |
| cm_alloc_id_priv(work->port->cm_dev->ib_device, NULL, NULL); |
| if (IS_ERR(cm_id_priv)) |
| return PTR_ERR(cm_id_priv); |
| |
| cm_id_priv->id.remote_id = |
| cpu_to_be32(IBA_GET(CM_REQ_LOCAL_COMM_ID, req_msg)); |
| cm_id_priv->id.service_id = |
| cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg)); |
| cm_id_priv->id.service_mask = ~cpu_to_be64(0); |
| cm_id_priv->tid = req_msg->hdr.tid; |
| cm_id_priv->timeout_ms = cm_convert_to_ms( |
| IBA_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg)); |
| cm_id_priv->max_cm_retries = IBA_GET(CM_REQ_MAX_CM_RETRIES, req_msg); |
| cm_id_priv->remote_qpn = |
| cpu_to_be32(IBA_GET(CM_REQ_LOCAL_QPN, req_msg)); |
| cm_id_priv->initiator_depth = |
| IBA_GET(CM_REQ_RESPONDER_RESOURCES, req_msg); |
| cm_id_priv->responder_resources = |
| IBA_GET(CM_REQ_INITIATOR_DEPTH, req_msg); |
| cm_id_priv->path_mtu = IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg); |
| cm_id_priv->pkey = cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg)); |
| cm_id_priv->sq_psn = cpu_to_be32(IBA_GET(CM_REQ_STARTING_PSN, req_msg)); |
| cm_id_priv->retry_count = IBA_GET(CM_REQ_RETRY_COUNT, req_msg); |
| cm_id_priv->rnr_retry_count = IBA_GET(CM_REQ_RNR_RETRY_COUNT, req_msg); |
| cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); |
| |
| 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); |
| cm_id_priv->timewait_info = NULL; |
| goto destroy; |
| } |
| cm_id_priv->timewait_info->work.remote_id = cm_id_priv->id.remote_id; |
| cm_id_priv->timewait_info->remote_ca_guid = |
| cpu_to_be64(IBA_GET(CM_REQ_LOCAL_CA_GUID, req_msg)); |
| cm_id_priv->timewait_info->remote_qpn = cm_id_priv->remote_qpn; |
| |
| /* |
| * Note that the ID pointer is not in the xarray at this point, |
| * so this set is only visible to the local thread. |
| */ |
| cm_id_priv->id.state = IB_CM_REQ_RCVD; |
| |
| listen_cm_id_priv = cm_match_req(work, cm_id_priv); |
| if (!listen_cm_id_priv) { |
| trace_icm_no_listener_err(&cm_id_priv->id); |
| cm_id_priv->id.state = IB_CM_IDLE; |
| ret = -EINVAL; |
| goto destroy; |
| } |
| |
| 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 && |
| rdma_protocol_roce(work->port->cm_dev->ib_device, |
| work->port->port_num)) { |
| work->path[0].rec_type = |
| sa_conv_gid_to_pathrec_type(gid_attr->gid_type); |
| } else { |
| cm_path_set_rec_type( |
| work->port->cm_dev->ib_device, work->port->port_num, |
| &work->path[0], |
| IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, |
| req_msg)); |
| } |
| 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_priv->id, IB_CM_REJ_INVALID_GID, |
| NULL, 0, NULL, 0); |
| else |
| ib_send_cm_rej(&cm_id_priv->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_priv->id, |
| IB_CM_REJ_INVALID_ALT_GID, |
| &work->path[0].sgid, |
| sizeof(work->path[0].sgid), NULL, 0); |
| goto rejected; |
| } |
| } |
| |
| 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_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); |
| |
| /* Now MAD handlers can see the new ID */ |
| spin_lock_irq(&cm_id_priv->lock); |
| cm_finalize_id(cm_id_priv); |
| |
| /* Refcount belongs to the event, pairs with cm_process_work() */ |
| refcount_inc(&cm_id_priv->refcount); |
| cm_queue_work_unlock(cm_id_priv, work); |
| /* |
| * Since this ID was just created and was not made visible to other MAD |
| * handlers until the cm_finalize_id() above we know that the |
| * cm_process_work() will deliver the event and the listen_cm_id |
| * embedded in the event can be derefed here. |
| */ |
| cm_deref_id(listen_cm_id_priv); |
| return 0; |
| |
| rejected: |
| cm_deref_id(listen_cm_id_priv); |
| destroy: |
| ib_destroy_cm_id(&cm_id_priv->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_ece_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid, |
| param->ece.attr_mod); |
| IBA_SET(CM_REP_LOCAL_COMM_ID, rep_msg, |
| be32_to_cpu(cm_id_priv->id.local_id)); |
| IBA_SET(CM_REP_REMOTE_COMM_ID, rep_msg, |
| be32_to_cpu(cm_id_priv->id.remote_id)); |
| IBA_SET(CM_REP_STARTING_PSN, rep_msg, param->starting_psn); |
| IBA_SET(CM_REP_RESPONDER_RESOURCES, rep_msg, |
| param->responder_resources); |
| IBA_SET(CM_REP_TARGET_ACK_DELAY, rep_msg, |
| cm_id_priv->av.port->cm_dev->ack_delay); |
| IBA_SET(CM_REP_FAILOVER_ACCEPTED, rep_msg, param->failover_accepted); |
| IBA_SET(CM_REP_RNR_RETRY_COUNT, rep_msg, param->rnr_retry_count); |
| IBA_SET(CM_REP_LOCAL_CA_GUID, rep_msg, |
| be64_to_cpu(cm_id_priv->id.device->node_guid)); |
| |
| if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) { |
| IBA_SET(CM_REP_INITIATOR_DEPTH, rep_msg, |
| param->initiator_depth); |
| IBA_SET(CM_REP_END_TO_END_FLOW_CONTROL, rep_msg, |
| param->flow_control); |
| IBA_SET(CM_REP_SRQ, rep_msg, param->srq); |
| IBA_SET(CM_REP_LOCAL_QPN, rep_msg, param->qp_num); |
| } else { |
| IBA_SET(CM_REP_SRQ, rep_msg, 1); |
| IBA_SET(CM_REP_LOCAL_EE_CONTEXT_NUMBER, rep_msg, param->qp_num); |
| } |
| |
| IBA_SET(CM_REP_VENDOR_ID_L, rep_msg, param->ece.vendor_id); |
| IBA_SET(CM_REP_VENDOR_ID_M, rep_msg, param->ece.vendor_id >> 8); |
| IBA_SET(CM_REP_VENDOR_ID_H, rep_msg, param->ece.vendor_id >> 16); |
| |
| if (param->private_data && param->private_data_len) |
| IBA_SET_MEM(CM_REP_PRIVATE_DATA, rep_msg, 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) { |
| trace_icm_send_rep_err(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; |
| |
| trace_icm_send_rep(cm_id); |
| 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 = cpu_to_be32(IBA_GET(CM_REP_STARTING_PSN, rep_msg)); |
| WARN_ONCE(param->qp_num & 0xFF000000, |
| "IBTA declares QPN to be 24 bits, but it is 0x%X\n", |
| param->qp_num); |
| 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); |
| IBA_SET(CM_RTU_LOCAL_COMM_ID, rtu_msg, |
| be32_to_cpu(cm_id_priv->id.local_id)); |
| IBA_SET(CM_RTU_REMOTE_COMM_ID, rtu_msg, |
| be32_to_cpu(cm_id_priv->id.remote_id)); |
| |
| if (private_data && private_data_len) |
| IBA_SET_MEM(CM_RTU_PRIVATE_DATA, rtu_msg, 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) { |
| trace_icm_send_cm_rtu_err(cm_id); |
| 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); |
| |
| trace_icm_send_rtu(cm_id); |
| 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 = |
| cpu_to_be64(IBA_GET(CM_REP_LOCAL_CA_GUID, rep_msg)); |
| param->remote_qkey = IBA_GET(CM_REP_LOCAL_Q_KEY, rep_msg); |
| param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type)); |
| param->starting_psn = IBA_GET(CM_REP_STARTING_PSN, rep_msg); |
| param->responder_resources = IBA_GET(CM_REP_INITIATOR_DEPTH, rep_msg); |
| param->initiator_depth = IBA_GET(CM_REP_RESPONDER_RESOURCES, rep_msg); |
| param->target_ack_delay = IBA_GET(CM_REP_TARGET_ACK_DELAY, rep_msg); |
| param->failover_accepted = IBA_GET(CM_REP_FAILOVER_ACCEPTED, rep_msg); |
| param->flow_control = IBA_GET(CM_REP_END_TO_END_FLOW_CONTROL, rep_msg); |
| param->rnr_retry_count = IBA_GET(CM_REP_RNR_RETRY_COUNT, rep_msg); |
| param->srq = IBA_GET(CM_REP_SRQ, rep_msg); |
| param->ece.vendor_id = IBA_GET(CM_REP_VENDOR_ID_H, rep_msg) << 16; |
| param->ece.vendor_id |= IBA_GET(CM_REP_VENDOR_ID_M, rep_msg) << 8; |
| param->ece.vendor_id |= IBA_GET(CM_REP_VENDOR_ID_L, rep_msg); |
| param->ece.attr_mod = be32_to_cpu(rep_msg->hdr.attr_mod); |
| |
| work->cm_event.private_data = |
| IBA_GET_MEM_PTR(CM_REP_PRIVATE_DATA, rep_msg); |
| } |
| |
| 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( |
| cpu_to_be32(IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)), |
| cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg))); |
| 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); |
| |
| trace_icm_send_dup_rep(&cm_id_priv->id); |
| 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 cm_timewait_info *timewait_info; |
| |
| rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; |
| cm_id_priv = cm_acquire_id( |
| cpu_to_be32(IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)), 0); |
| if (!cm_id_priv) { |
| cm_dup_rep_handler(work); |
| trace_icm_remote_no_priv_err( |
| IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)); |
| 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: |
| ret = -EINVAL; |
| trace_icm_rep_unknown_err( |
| IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg), |
| IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg), |
| cm_id_priv->id.state); |
| spin_unlock_irq(&cm_id_priv->lock); |
| goto error; |
| } |
| |
| cm_id_priv->timewait_info->work.remote_id = |
| cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg)); |
| cm_id_priv->timewait_info->remote_ca_guid = |
| cpu_to_be64(IBA_GET(CM_REP_LOCAL_CA_GUID, rep_msg)); |
| 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; |
| trace_icm_insert_failed_err( |
| IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)); |
| goto error; |
| } |
| /* Check for a stale connection. */ |
| timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); |
| if (timewait_info) { |
| cm_remove_remote(cm_id_priv); |
| cur_cm_id_priv = cm_acquire_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; |
| trace_icm_staleconn_err( |
| IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg), |
| IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)); |
| |
| if (cur_cm_id_priv) { |
| ib_send_cm_dreq(&cur_cm_id_priv->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 = |
| cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg)); |
| cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); |
| cm_id_priv->initiator_depth = |
| IBA_GET(CM_REP_RESPONDER_RESOURCES, rep_msg); |
| cm_id_priv->responder_resources = |
| IBA_GET(CM_REP_INITIATOR_DEPTH, rep_msg); |
| cm_id_priv->sq_psn = cpu_to_be32(IBA_GET(CM_REP_STARTING_PSN, rep_msg)); |
| cm_id_priv->rnr_retry_count = IBA_GET(CM_REP_RNR_RETRY_COUNT, rep_msg); |
| cm_id_priv->target_ack_delay = |
| IBA_GET(CM_REP_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); |
| |
| ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg); |
| cm_queue_work_unlock(cm_id_priv, work); |
| 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; |
| |
| /* 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); |
| cm_queue_work_unlock(cm_id_priv, work); |
| 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; |
| |
| rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; |
| cm_id_priv = cm_acquire_id( |
| cpu_to_be32(IBA_GET(CM_RTU_REMOTE_COMM_ID, rtu_msg)), |
| cpu_to_be32(IBA_GET(CM_RTU_LOCAL_COMM_ID, rtu_msg))); |
| if (!cm_id_priv) |
| return -EINVAL; |
| |
| work->cm_event.private_data = |
| IBA_GET_MEM_PTR(CM_RTU_PRIVATE_DATA, rtu_msg); |
| |
| 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); |
| cm_queue_work_unlock(cm_id_priv, work); |
| 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)); |
| IBA_SET(CM_DREQ_LOCAL_COMM_ID, dreq_msg, |
| be32_to_cpu(cm_id_priv->id.local_id)); |
| IBA_SET(CM_DREQ_REMOTE_COMM_ID, dreq_msg, |
| be32_to_cpu(cm_id_priv->id.remote_id)); |
| IBA_SET(CM_DREQ_REMOTE_QPN_EECN, dreq_msg, |
| be32_to_cpu(cm_id_priv->remote_qpn)); |
| |
| if (private_data && private_data_len) |
| IBA_SET_MEM(CM_DREQ_PRIVATE_DATA, dreq_msg, private_data, |
| private_data_len); |
| } |
| |
| static int cm_send_dreq_locked(struct cm_id_private *cm_id_priv, |
| const void *private_data, u8 private_data_len) |
| { |
| struct ib_mad_send_buf *msg; |
| int ret; |
| |
| lockdep_assert_held(&cm_id_priv->lock); |
| |
| if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) |
| return -EINVAL; |
| |
| if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { |
| trace_icm_dreq_skipped(&cm_id_priv->id); |
| return -EINVAL; |
| } |
| |
| 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); |
| |
| ret = cm_alloc_msg(cm_id_priv, &msg); |
| if (ret) { |
| cm_enter_timewait(cm_id_priv); |
| return ret; |
| } |
| |
| 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; |
| |
| trace_icm_send_dreq(&cm_id_priv->id); |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) { |
| cm_enter_timewait(cm_id_priv); |
| cm_free_msg(msg); |
| return ret; |
| } |
| |
| cm_id_priv->id.state = IB_CM_DREQ_SENT; |
| cm_id_priv->msg = msg; |
| return 0; |
| } |
| |
| 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 = |
| container_of(cm_id, struct cm_id_private, id); |
| unsigned long flags; |
| int ret; |
| |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| ret = cm_send_dreq_locked(cm_id_priv, private_data, private_data_len); |
| 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); |
| IBA_SET(CM_DREP_LOCAL_COMM_ID, drep_msg, |
| be32_to_cpu(cm_id_priv->id.local_id)); |
| IBA_SET(CM_DREP_REMOTE_COMM_ID, drep_msg, |
| be32_to_cpu(cm_id_priv->id.remote_id)); |
| |
| if (private_data && private_data_len) |
| IBA_SET_MEM(CM_DREP_PRIVATE_DATA, drep_msg, private_data, |
| private_data_len); |
| } |
| |
| static int cm_send_drep_locked(struct cm_id_private *cm_id_priv, |
| void *private_data, u8 private_data_len) |
| { |
| struct ib_mad_send_buf *msg; |
| int ret; |
| |
| lockdep_assert_held(&cm_id_priv->lock); |
| |
| if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) |
| return -EINVAL; |
| |
| if (cm_id_priv->id.state != IB_CM_DREQ_RCVD) { |
| trace_icm_send_drep_err(&cm_id_priv->id); |
| kfree(private_data); |
| return -EINVAL; |
| } |
| |
| cm_set_private_data(cm_id_priv, private_data, private_data_len); |
| cm_enter_timewait(cm_id_priv); |
| |
| ret = cm_alloc_msg(cm_id_priv, &msg); |
| if (ret) |
| return ret; |
| |
| cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, |
| private_data, private_data_len); |
| |
| trace_icm_send_drep(&cm_id_priv->id); |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) { |
| cm_free_msg(msg); |
| return ret; |
| } |
| return 0; |
| } |
| |
| 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 = |
| container_of(cm_id, struct cm_id_private, id); |
| unsigned long flags; |
| void *data; |
| int ret; |
| |
| data = cm_copy_private_data(private_data, private_data_len); |
| if (IS_ERR(data)) |
| return PTR_ERR(data); |
| |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| ret = cm_send_drep_locked(cm_id_priv, data, private_data_len); |
| 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); |
| IBA_SET(CM_DREP_REMOTE_COMM_ID, drep_msg, |
| IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg)); |
| IBA_SET(CM_DREP_LOCAL_COMM_ID, drep_msg, |
| IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg)); |
| |
| trace_icm_issue_drep( |
| IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg), |
| IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg)); |
| 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; |
| |
| dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; |
| cm_id_priv = cm_acquire_id( |
| cpu_to_be32(IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg)), |
| cpu_to_be32(IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg))); |
| 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); |
| trace_icm_no_priv_err( |
| IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg), |
| IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg)); |
| return -EINVAL; |
| } |
| |
| work->cm_event.private_data = |
| IBA_GET_MEM_PTR(CM_DREQ_PRIVATE_DATA, dreq_msg); |
| |
| spin_lock_irq(&cm_id_priv->lock); |
| if (cm_id_priv->local_qpn != |
| cpu_to_be32(IBA_GET(CM_DREQ_REMOTE_QPN_EECN, 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: |
| trace_icm_dreq_unknown_err(&cm_id_priv->id); |
| goto unlock; |
| } |
| cm_id_priv->id.state = IB_CM_DREQ_RCVD; |
| cm_id_priv->tid = dreq_msg->hdr.tid; |
| cm_queue_work_unlock(cm_id_priv, work); |
| 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; |
| |
| drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; |
| cm_id_priv = cm_acquire_id( |
| cpu_to_be32(IBA_GET(CM_DREP_REMOTE_COMM_ID, drep_msg)), |
| cpu_to_be32(IBA_GET(CM_DREP_LOCAL_COMM_ID, drep_msg))); |
| if (!cm_id_priv) |
| return -EINVAL; |
| |
| work->cm_event.private_data = |
| IBA_GET_MEM_PTR(CM_DREP_PRIVATE_DATA, drep_msg); |
| |
| 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); |
| cm_queue_work_unlock(cm_id_priv, work); |
| return 0; |
| out: |
| cm_deref_id(cm_id_priv); |
| return -EINVAL; |
| } |
| |
| static int cm_send_rej_locked(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) |
| { |
| enum ib_cm_state state = cm_id_priv->id.state; |
| struct ib_mad_send_buf *msg; |
| int ret; |
| |
| lockdep_assert_held(&cm_id_priv->lock); |
| |
| if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || |
| (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) |
| return -EINVAL; |
| |
| switch (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: |
| cm_reset_to_idle(cm_id_priv); |
| ret = cm_alloc_msg(cm_id_priv, &msg); |
| if (ret) |
| return ret; |
| cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, reason, |
| ari, ari_length, private_data, private_data_len, |
| state); |
| break; |
| case IB_CM_REP_SENT: |
| case IB_CM_MRA_REP_RCVD: |
| cm_enter_timewait(cm_id_priv); |
| ret = cm_alloc_msg(cm_id_priv, &msg); |
| if (ret) |
| return ret; |
| cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, reason, |
| ari, ari_length, private_data, private_data_len, |
| state); |
| break; |
| default: |
| trace_icm_send_unknown_rej_err(&cm_id_priv->id); |
| return -EINVAL; |
| } |
| |
| trace_icm_send_rej(&cm_id_priv->id, reason); |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) { |
| cm_free_msg(msg); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| 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 = |
| container_of(cm_id, struct cm_id_private, id); |
| unsigned long flags; |
| int ret; |
| |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| ret = cm_send_rej_locked(cm_id_priv, reason, ari, ari_length, |
| private_data, private_data_len); |
| 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 = IBA_GET_MEM_PTR(CM_REJ_ARI, rej_msg); |
| param->ari_length = IBA_GET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg); |
| param->reason = IBA_GET(CM_REJ_REASON, rej_msg); |
| work->cm_event.private_data = |
| IBA_GET_MEM_PTR(CM_REJ_PRIVATE_DATA, rej_msg); |
| } |
| |
| static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) |
| { |
| struct cm_id_private *cm_id_priv; |
| __be32 remote_id; |
| |
| remote_id = cpu_to_be32(IBA_GET(CM_REJ_LOCAL_COMM_ID, rej_msg)); |
| |
| if (IBA_GET(CM_REJ_REASON, rej_msg) == IB_CM_REJ_TIMEOUT) { |
| cm_id_priv = cm_find_remote_id( |
| *((__be64 *)IBA_GET_MEM_PTR(CM_REJ_ARI, rej_msg)), |
| remote_id); |
| } else if (IBA_GET(CM_REJ_MESSAGE_REJECTED, rej_msg) == |
| CM_MSG_RESPONSE_REQ) |
| cm_id_priv = cm_acquire_id( |
| cpu_to_be32(IBA_GET(CM_REJ_REMOTE_COMM_ID, rej_msg)), |
| 0); |
| else |
| cm_id_priv = cm_acquire_id( |
| cpu_to_be32(IBA_GET(CM_REJ_REMOTE_COMM_ID, rej_msg)), |
| 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; |
| |
| 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); |
| fallthrough; |
| case IB_CM_REQ_RCVD: |
| case IB_CM_MRA_REQ_SENT: |
| if (IBA_GET(CM_REJ_REASON, rej_msg) == 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); |
| fallthrough; |
| 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; |
| } |
| fallthrough; |
| default: |
| trace_icm_rej_unknown_err(&cm_id_priv->id); |
| spin_unlock_irq(&cm_id_priv->lock); |
| goto out; |
| } |
| |
| cm_queue_work_unlock(cm_id_priv, work); |
| 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; |
| } |
| fallthrough; |
| default: |
| trace_icm_send_mra_unknown_err(&cm_id_priv->id); |
| 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); |
| trace_icm_send_mra(cm_id); |
| 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 (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg)) { |
| case CM_MSG_RESPONSE_REQ: |
| return cm_acquire_id( |
| cpu_to_be32(IBA_GET(CM_MRA_REMOTE_COMM_ID, mra_msg)), |
| 0); |
| case CM_MSG_RESPONSE_REP: |
| case CM_MSG_RESPONSE_OTHER: |
| return cm_acquire_id( |
| cpu_to_be32(IBA_GET(CM_MRA_REMOTE_COMM_ID, mra_msg)), |
| cpu_to_be32(IBA_GET(CM_MRA_LOCAL_COMM_ID, mra_msg))); |
| 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; |
| |
| 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 = |
| IBA_GET_MEM_PTR(CM_MRA_PRIVATE_DATA, mra_msg); |
| work->cm_event.param.mra_rcvd.service_timeout = |
| IBA_GET(CM_MRA_SERVICE_TIMEOUT, mra_msg); |
| timeout = cm_convert_to_ms(IBA_GET(CM_MRA_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 (IBA_GET(CM_MRA_MESSAGE_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 (IBA_GET(CM_MRA_MESSAGE_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 (IBA_GET(CM_MRA_MESSAGE_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]); |
| fallthrough; |
| default: |
| trace_icm_mra_unknown_err(&cm_id_priv->id); |
| goto out; |
| } |
| |
| cm_id_priv->msg->context[1] = (void *) (unsigned long) |
| cm_id_priv->id.state; |
| cm_queue_work_unlock(cm_id_priv, work); |
| return 0; |
| out: |
| spin_unlock_irq(&cm_id_priv->lock); |
| cm_deref_id(cm_id_priv); |
| return -EINVAL; |
| } |
| |
| 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, IBA_GET(CM_LAP_ALTERNATE_LOCAL_PORT_LID, |
| lap_msg)); |
| sa_path_set_slid(path, IBA_GET(CM_LAP_ALTERNATE_REMOTE_PORT_LID, |
| lap_msg)); |
| } else { |
| lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( |
| CM_LAP_ALTERNATE_LOCAL_PORT_GID, lap_msg)); |
| sa_path_set_dlid(path, lid); |
| |
| lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( |
| CM_LAP_ALTERNATE_REMOTE_PORT_GID, lap_msg)); |
| 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 = *IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_LOCAL_PORT_GID, lap_msg); |
| path->sgid = |
| *IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_REMOTE_PORT_GID, lap_msg); |
| path->flow_label = |
| cpu_to_be32(IBA_GET(CM_LAP_ALTERNATE_FLOW_LABEL, lap_msg)); |
| path->hop_limit = IBA_GET(CM_LAP_ALTERNATE_HOP_LIMIT, lap_msg); |
| path->traffic_class = IBA_GET(CM_LAP_ALTERNATE_TRAFFIC_CLASS, lap_msg); |
| path->reversible = 1; |
| path->pkey = cm_id_priv->pkey; |
| path->sl = IBA_GET(CM_LAP_ALTERNATE_SL, lap_msg); |
| path->mtu_selector = IB_SA_EQ; |
| path->mtu = cm_id_priv->path_mtu; |
| path->rate_selector = IB_SA_EQ; |
| path->rate = IBA_GET(CM_LAP_ALTERNATE_PACKET_RATE, lap_msg); |
| path->packet_life_time_selector = IB_SA_EQ; |
| path->packet_life_time = |
| IBA_GET(CM_LAP_ALTERNATE_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( |
| cpu_to_be32(IBA_GET(CM_LAP_REMOTE_COMM_ID, lap_msg)), |
| cpu_to_be32(IBA_GET(CM_LAP_LOCAL_COMM_ID, lap_msg))); |
| 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], |
| IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_LOCAL_PORT_GID, |
| lap_msg)); |
| param->alternate_path = &work->path[0]; |
| cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); |
| work->cm_event.private_data = |
| IBA_GET_MEM_PTR(CM_LAP_PRIVATE_DATA, lap_msg); |
| |
| 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; |
| cm_queue_work_unlock(cm_id_priv, work); |
| return 0; |
| |
| unlock: spin_unlock_irq(&cm_id_priv->lock); |
| deref: cm_deref_id(cm_id_priv); |
| return -EINVAL; |
| } |
| |
| static int cm_apr_handler(struct cm_work *work) |
| { |
| struct cm_id_private *cm_id_priv; |
| struct cm_apr_msg *apr_msg; |
| |
| /* 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( |
| cpu_to_be32(IBA_GET(CM_APR_REMOTE_COMM_ID, apr_msg)), |
| cpu_to_be32(IBA_GET(CM_APR_LOCAL_COMM_ID, apr_msg))); |
| if (!cm_id_priv) |
| return -EINVAL; /* Unmatched reply. */ |
| |
| work->cm_event.param.apr_rcvd.ap_status = |
| IBA_GET(CM_APR_AR_STATUS, apr_msg); |
| work->cm_event.param.apr_rcvd.apr_info = |
| IBA_GET_MEM_PTR(CM_APR_ADDITIONAL_INFORMATION, apr_msg); |
| work->cm_event.param.apr_rcvd.info_len = |
| IBA_GET(CM_APR_ADDITIONAL_INFORMATION_LENGTH, apr_msg); |
| work->cm_event.private_data = |
| IBA_GET_MEM_PTR(CM_APR_PRIVATE_DATA, apr_msg); |
| |
| 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; |
| cm_queue_work_unlock(cm_id_priv, work); |
| 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; |
| |
| timewait_info = container_of(work, 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; |
| cm_queue_work_unlock(cm_id_priv, work); |
| 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)); |
| IBA_SET(CM_SIDR_REQ_REQUESTID, sidr_req_msg, |
| be32_to_cpu(cm_id_priv->id.local_id)); |
| IBA_SET(CM_SIDR_REQ_PARTITION_KEY, sidr_req_msg, |
| be16_to_cpu(param->path->pkey)); |
| IBA_SET(CM_SIDR_REQ_SERVICEID, sidr_req_msg, |
| be64_to_cpu(param->service_id)); |
| |
| if (param->private_data && param->private_data_len) |
| IBA_SET_MEM(CM_SIDR_REQ_PRIVATE_DATA, sidr_req_msg, |
| 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) { |
| trace_icm_send_sidr_req(&cm_id_priv->id); |
| 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 = IBA_GET(CM_SIDR_REQ_PARTITION_KEY, sidr_req_msg); |
| param->listen_id = listen_id; |
| param->service_id = |
| cpu_to_be64(IBA_GET(CM_SIDR_REQ_SERVICEID, sidr_req_msg)); |
| 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 = |
| IBA_GET_MEM_PTR(CM_SIDR_REQ_PRIVATE_DATA, sidr_req_msg); |
| } |
| |
| static int cm_sidr_req_handler(struct cm_work *work) |
| { |
| struct cm_id_private *cm_id_priv, *listen_cm_id_priv; |
| struct cm_sidr_req_msg *sidr_req_msg; |
| struct ib_wc *wc; |
| int ret; |
| |
| cm_id_priv = |
| cm_alloc_id_priv(work->port->cm_dev->ib_device, NULL, NULL); |
| if (IS_ERR(cm_id_priv)) |
| return PTR_ERR(cm_id_priv); |
| |
| /* Record SGID/SLID and request ID for lookup. */ |
| sidr_req_msg = (struct cm_sidr_req_msg *) |
| work->mad_recv_wc->recv_buf.mad; |
| |
| cm_id_priv->id.remote_id = |
| cpu_to_be32(IBA_GET(CM_SIDR_REQ_REQUESTID, sidr_req_msg)); |
| cm_id_priv->id.service_id = |
| cpu_to_be64(IBA_GET(CM_SIDR_REQ_SERVICEID, sidr_req_msg)); |
| cm_id_priv->id.service_mask = ~cpu_to_be64(0); |
| cm_id_priv->tid = sidr_req_msg->hdr.tid; |
| |
| 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; |
| |
| spin_lock_irq(&cm.lock); |
| listen_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); |
| if (listen_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; |
| listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, |
| cm_id_priv->id.service_id); |
| if (!listen_cm_id_priv) { |
| spin_unlock_irq(&cm.lock); |
| ib_send_cm_sidr_rep(&cm_id_priv->id, |
| &(struct ib_cm_sidr_rep_param){ |
| .status = IB_SIDR_UNSUPPORTED }); |
| goto out; /* No match. */ |
| } |
| spin_unlock_irq(&cm.lock); |
| |
| cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; |
| cm_id_priv->id.context = listen_cm_id_priv->id.context; |
| |
| /* |
| * A SIDR ID does not need to be in the xarray since it does not receive |
| * mads, is not placed in the remote_id or remote_qpn rbtree, and does |
| * not enter timewait. |
| */ |
| |
| cm_format_sidr_req_event(work, cm_id_priv, &listen_cm_id_priv->id); |
| ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); |
| cm_free_work(work); |
| /* |
| * A pointer to the listen_cm_id is held in the event, so this deref |
| * must be after the event is delivered above. |
| */ |
| cm_deref_id(listen_cm_id_priv); |
| if (ret) |
| cm_destroy_id(&cm_id_priv->id, ret); |
| 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_ece_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, |
| cm_id_priv->tid, param->ece.attr_mod); |
| IBA_SET(CM_SIDR_REP_REQUESTID, sidr_rep_msg, |
| be32_to_cpu(cm_id_priv->id.remote_id)); |
| IBA_SET(CM_SIDR_REP_STATUS, sidr_rep_msg, param->status); |
| IBA_SET(CM_SIDR_REP_QPN, sidr_rep_msg, param->qp_num); |
| IBA_SET(CM_SIDR_REP_SERVICEID, sidr_rep_msg, |
| be64_to_cpu(cm_id_priv->id.service_id)); |
| IBA_SET(CM_SIDR_REP_Q_KEY, sidr_rep_msg, param->qkey); |
| IBA_SET(CM_SIDR_REP_VENDOR_ID_L, sidr_rep_msg, |
| param->ece.vendor_id & 0xFF); |
| IBA_SET(CM_SIDR_REP_VENDOR_ID_H, sidr_rep_msg, |
| (param->ece.vendor_id >> 8) & 0xFF); |
| |
| if (param->info && param->info_length) |
| IBA_SET_MEM(CM_SIDR_REP_ADDITIONAL_INFORMATION, sidr_rep_msg, |
| param->info, param->info_length); |
| |
| if (param->private_data && param->private_data_len) |
| IBA_SET_MEM(CM_SIDR_REP_PRIVATE_DATA, sidr_rep_msg, |
| param->private_data, param->private_data_len); |
| } |
| |
| static int cm_send_sidr_rep_locked(struct cm_id_private *cm_id_priv, |
| struct ib_cm_sidr_rep_param *param) |
| { |
| struct ib_mad_send_buf *msg; |
| int ret; |
| |
| lockdep_assert_held(&cm_id_priv->lock); |
| |
| 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; |
| |
| if (cm_id_priv->id.state != IB_CM_SIDR_REQ_RCVD) |
| return -EINVAL; |
| |
| ret = cm_alloc_msg(cm_id_priv, &msg); |
| if (ret) |
| return ret; |
| |
| cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, |
| param); |
| trace_icm_send_sidr_rep(&cm_id_priv->id); |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) { |
| cm_free_msg(msg); |
| return ret; |
| } |
| cm_id_priv->id.state = IB_CM_IDLE; |
| 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); |
| RB_CLEAR_NODE(&cm_id_priv->sidr_id_node); |
| } |
| spin_unlock_irq(&cm.lock); |
| return 0; |
| } |
| |
| 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 = |
| container_of(cm_id, struct cm_id_private, id); |
| unsigned long flags; |
| int ret; |
| |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| ret = cm_send_sidr_rep_locked(cm_id_priv, param); |
| 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 = IBA_GET(CM_SIDR_REP_STATUS, sidr_rep_msg); |
| param->qkey = IBA_GET(CM_SIDR_REP_Q_KEY, sidr_rep_msg); |
| param->qpn = IBA_GET(CM_SIDR_REP_QPN, sidr_rep_msg); |
| param->info = IBA_GET_MEM_PTR(CM_SIDR_REP_ADDITIONAL_INFORMATION, |
| sidr_rep_msg); |
| param->info_len = IBA_GET(CM_SIDR_REP_ADDITIONAL_INFORMATION_LENGTH, |
| sidr_rep_msg); |
| param->sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr; |
| work->cm_event.private_data = |
| IBA_GET_MEM_PTR(CM_SIDR_REP_PRIVATE_DATA, sidr_rep_msg); |
| } |
| |
| 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( |
| cpu_to_be32(IBA_GET(CM_SIDR_REP_REQUESTID, sidr_rep_msg)), 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; |
| |
| trace_icm_mad_send_err(state, 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: |
| trace_icm_handler_err(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: |
| trace_icm_establish_err(cm_id); |
| 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(struct_size(work, path, 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: |
| trace_icm_qp_init_err(&cm_id_priv->id); |
| 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: |
| trace_icm_qp_rtr_err(&cm_id_priv->id); |
| 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; |
| fallthrough; |
| 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: |
| trace_icm_qp_rts_err(&cm_id_priv->id); |
| 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 sysfs_emit(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 int cm_create_port_fs(struct cm_port *port) |
| { |
| int i, ret; |
| |
| for (i = 0; i < CM_COUNTER_GROUPS; i++) { |
| ret = ib_port_register_module_stat(port->cm_dev->ib_device, |
| port->port_num, |
| &port->counter_group[i].obj, |
| &cm_counter_obj_type, |
| counter_group_names[i]); |
| if (ret) |
| goto error; |
| } |
| |
| return 0; |
| |
| error: |
| while (i--) |
| ib_port_unregister_module_stat(&port->counter_group[i].obj); |
| return ret; |
| |
| } |
| |
| static void cm_remove_port_fs(struct cm_port *port) |
| { |
| int i; |
| |
| for (i = 0; i < CM_COUNTER_GROUPS; i++) |
| ib_port_unregister_module_stat(&port->counter_group[i].obj); |
| |
| } |
| |
| static int 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 -ENOMEM; |
| |
| cm_dev->ib_device = ib_device; |
| cm_dev->ack_delay = ib_device->attrs.local_ca_ack_delay; |
| cm_dev->going_down = 0; |
| |
| 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) { |
| ret = -ENOMEM; |
| 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)) { |
| ret = PTR_ERR(port->mad_agent); |
| goto error2; |
| } |
| |
| ret = ib_modify_port(ib_device, i, 0, &port_modify); |
| if (ret) |
| goto error3; |
| |
| count++; |
| } |
| |
| if (!count) { |
| ret = -EOPNOTSUPP; |
| 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 0; |
| |
| 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; |
| kfree(port); |
| 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); |
| kfree(port); |
| } |
| free: |
| kfree(cm_dev); |
| return ret; |
| } |
| |
| 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; |
| |
| 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); |
| kfree(port); |
| } |
| |
| kfree(cm_dev); |
| } |
| |
| static int __init ib_cm_init(void) |
| { |
| int ret; |
| |
| 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; |
| xa_init_flags(&cm.local_id_table, XA_FLAGS_ALLOC); |
| get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); |
| INIT_LIST_HEAD(&cm.timewait_list); |
| |
| 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: |
| 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); |
| } |
| |
| WARN_ON(!xa_empty(&cm.local_id_table)); |
| } |
| |
| module_init(ib_cm_init); |
| module_exit(ib_cm_cleanup); |