| // 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 <rdma/ib_sysfs.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; |
| } 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 |
| }; |
| |
| struct cm_counter_attribute { |
| struct ib_port_attribute attr; |
| unsigned short group; |
| unsigned short index; |
| }; |
| |
| struct cm_port { |
| struct cm_device *cm_dev; |
| struct ib_mad_agent *mad_agent; |
| u32 port_num; |
| atomic_long_t counters[CM_COUNTER_GROUPS][CM_ATTR_COUNT]; |
| }; |
| |
| struct cm_device { |
| struct kref kref; |
| struct list_head list; |
| spinlock_t mad_agent_lock; |
| struct ib_device *ib_device; |
| u8 ack_delay; |
| int going_down; |
| struct cm_port *port[]; |
| }; |
| |
| struct cm_av { |
| struct cm_port *port; |
| 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; |
| u32 sidr_slid; |
| 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 work_list; |
| atomic_t work_count; |
| |
| struct rdma_ucm_ece ece; |
| }; |
| |
| static void cm_dev_release(struct kref *kref) |
| { |
| struct cm_device *cm_dev = container_of(kref, struct cm_device, kref); |
| u32 i; |
| |
| rdma_for_each_port(cm_dev->ib_device, i) |
| kfree(cm_dev->port[i - 1]); |
| |
| kfree(cm_dev); |
| } |
| |
| static void cm_device_put(struct cm_device *cm_dev) |
| { |
| kref_put(&cm_dev->kref, cm_dev_release); |
| } |
| |
| 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 struct ib_mad_send_buf *cm_alloc_msg(struct cm_id_private *cm_id_priv) |
| { |
| struct ib_mad_agent *mad_agent; |
| struct ib_mad_send_buf *m; |
| struct ib_ah *ah; |
| |
| lockdep_assert_held(&cm_id_priv->lock); |
| |
| if (!cm_id_priv->av.port) |
| return ERR_PTR(-EINVAL); |
| |
| spin_lock(&cm_id_priv->av.port->cm_dev->mad_agent_lock); |
| mad_agent = cm_id_priv->av.port->mad_agent; |
| if (!mad_agent) { |
| m = ERR_PTR(-EINVAL); |
| goto out; |
| } |
| |
| ah = rdma_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr, 0); |
| if (IS_ERR(ah)) { |
| m = ERR_CAST(ah); |
| goto out; |
| } |
| |
| m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, |
| cm_id_priv->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); |
| 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; |
| |
| out: |
| spin_unlock(&cm_id_priv->av.port->cm_dev->mad_agent_lock); |
| return m; |
| } |
| |
| static void cm_free_msg(struct ib_mad_send_buf *msg) |
| { |
| struct cm_id_private *cm_id_priv = msg->context[0]; |
| |
| if (msg->ah) |
| rdma_destroy_ah(msg->ah, 0); |
| cm_deref_id(cm_id_priv); |
| ib_free_send_mad(msg); |
| } |
| |
| static struct ib_mad_send_buf * |
| cm_alloc_priv_msg(struct cm_id_private *cm_id_priv) |
| { |
| struct ib_mad_send_buf *msg; |
| |
| lockdep_assert_held(&cm_id_priv->lock); |
| |
| msg = cm_alloc_msg(cm_id_priv); |
| if (IS_ERR(msg)) |
| return msg; |
| cm_id_priv->msg = msg; |
| return msg; |
| } |
| |
| static void cm_free_priv_msg(struct ib_mad_send_buf *msg) |
| { |
| struct cm_id_private *cm_id_priv = msg->context[0]; |
| |
| lockdep_assert_held(&cm_id_priv->lock); |
| |
| if (!WARN_ON(cm_id_priv->msg != msg)) |
| cm_id_priv->msg = NULL; |
| |
| if (msg->ah) |
| rdma_destroy_ah(msg->ah, 0); |
| cm_deref_id(cm_id_priv); |
| ib_free_send_mad(msg); |
| } |
| |
| 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 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) { |
| ib_free_send_mad(m); |
| return ret; |
| } |
| |
| *msg = m; |
| return 0; |
| } |
| |
| static void cm_free_response_msg(struct ib_mad_send_buf *msg) |
| { |
| if (msg->ah) |
| rdma_destroy_ah(msg->ah, 0); |
| ib_free_send_mad(msg); |
| } |
| |
| 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 void cm_set_av_port(struct cm_av *av, struct cm_port *port) |
| { |
| struct cm_port *old_port = av->port; |
| |
| if (old_port == port) |
| return; |
| |
| av->port = port; |
| if (old_port) |
| cm_device_put(old_port->cm_dev); |
| if (port) |
| kref_get(&port->cm_dev->kref); |
| } |
| |
| static void cm_init_av_for_lap(struct cm_port *port, struct ib_wc *wc, |
| struct rdma_ah_attr *ah_attr, struct cm_av *av) |
| { |
| cm_set_av_port(av, port); |
| av->pkey_index = wc->pkey_index; |
| rdma_move_ah_attr(&av->ah_attr, ah_attr); |
| } |
| |
| static int cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, |
| struct ib_grh *grh, struct cm_av *av) |
| { |
| cm_set_av_port(av, 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 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 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; |
| |
| cm_set_av_port(av, 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; |
| rdma_move_ah_attr(&av->ah_attr, &new_ah_attr); |
| return 0; |
| } |
| |
| /* Move av created by cm_init_av_by_path(), so av.dgid is not moved */ |
| static void cm_move_av_from_path(struct cm_av *dest, struct cm_av *src) |
| { |
| cm_set_av_port(dest, src->port); |
| cm_set_av_port(src, NULL); |
| dest->pkey_index = src->pkey_index; |
| rdma_move_ah_attr(&dest->ah_attr, &src->ah_attr); |
| dest->timeout = src->timeout; |
| } |
| |
| static void cm_destroy_av(struct cm_av *av) |
| { |
| rdma_destroy_ah_attr(&av->ah_attr); |
| cm_set_av_port(av, NULL); |
| } |
| |
| 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; |
| __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 { |
| if (cur_cm_id_priv->sidr_slid < cm_id_priv->sidr_slid) |
| link = &(*link)->rb_left; |
| else if (cur_cm_id_priv->sidr_slid > cm_id_priv->sidr_slid) |
| 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); |
| 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->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->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->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->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; |
| } |
| |
| 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); |
| |
| cm_destroy_av(&cm_id_priv->av); |
| cm_destroy_av(&cm_id_priv->alt_av); |
| 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 = 0, low_tid; |
| |
| lockdep_assert_held(&cm_id_priv->lock); |
| |
| low_tid = (u64)cm_id_priv->id.local_id; |
| if (!cm_id_priv->av.port) |
| return cpu_to_be64(low_tid); |
| |
| spin_lock(&cm_id_priv->av.port->cm_dev->mad_agent_lock); |
| if (cm_id_priv->av.port->mad_agent) |
| hi_tid = ((u64)cm_id_priv->av.port->mad_agent->hi_tid) << 32; |
| spin_unlock(&cm_id_priv->av.port->cm_dev->mad_agent_lock); |
| 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_av av = {}, alt_av = {}; |
| struct cm_id_private *cm_id_priv; |
| struct ib_mad_send_buf *msg; |
| 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); |
| return -EINVAL; |
| } |
| 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; |
| return ret; |
| } |
| |
| ret = cm_init_av_by_path(param->primary_path, |
| param->ppath_sgid_attr, &av); |
| if (ret) |
| return ret; |
| if (param->alternate_path) { |
| ret = cm_init_av_by_path(param->alternate_path, NULL, |
| &alt_av); |
| if (ret) { |
| cm_destroy_av(&av); |
| return ret; |
| } |
| } |
| 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; |
| |
| spin_lock_irqsave(&cm_id_priv->lock, flags); |
| |
| cm_move_av_from_path(&cm_id_priv->av, &av); |
| if (param->alternate_path) |
| cm_move_av_from_path(&cm_id_priv->alt_av, &alt_av); |
| |
| msg = cm_alloc_priv_msg(cm_id_priv); |
| if (IS_ERR(msg)) { |
| ret = PTR_ERR(msg); |
| goto out_unlock; |
| } |
| |
| req_msg = (struct cm_req_msg *)msg->mad; |
| cm_format_req(req_msg, cm_id_priv, param); |
| cm_id_priv->tid = req_msg->hdr.tid; |
| msg->timeout_ms = cm_id_priv->timeout_ms; |
| 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); |
| ret = ib_post_send_mad(msg, NULL); |
| if (ret) |
| goto out_free; |
| 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; |
| out_free: |
| cm_free_priv_msg(msg); |
| out_unlock: |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| 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_response_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, u32 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; |
| u32 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 %u, pkey index %u). %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; |
| u32 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->counters[CM_RECV_DUPLICATES][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_response_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; |
| } |
| |
| 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 (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE) { |
| work->path[0].rec_type = |
| sa_conv_gid_to_pathrec_type(gid_attr->gid_type); |
| } else { |
| cm_process_routed_req(req_msg, work->mad_recv_wc->wc); |
| 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; |
| |
| /* This destroy call is needed to pair with cm_init_av_for_response */ |
| cm_destroy_av(&cm_id_priv->av); |
| ret = cm_init_av_by_path(&work->path[0], gid_attr, &cm_id_priv->av); |
| 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); |
| 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; |
| } |
| |
| msg = cm_alloc_priv_msg(cm_id_priv); |
| if (IS_ERR(msg)) { |
| ret = PTR_ERR(msg); |
| 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) |
| goto out_free; |
| |
| cm_id->state = IB_CM_REP_SENT; |
| 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); |
| spin_unlock_irqrestore(&cm_id_priv->lock, flags); |
| return 0; |
| |
| out_free: |
| cm_free_priv_msg(msg); |
| 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; |
| } |
| |
| msg = cm_alloc_msg(cm_id_priv); |
| if (IS_ERR(msg)) { |
| ret = PTR_ERR(msg); |
| 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->counters[CM_RECV_DUPLICATES][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_response_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->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->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->counters[CM_RECV_DUPLICATES] |
| [CM_RTU_COUNTER]); |
| goto out; |
| } |
| cm_id_priv->id.state = IB_CM_ESTABLISHED; |
| |
| ib_cancel_mad(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->msg); |
| |
| msg = cm_alloc_priv_msg(cm_id_priv); |
| if (IS_ERR(msg)) { |
| cm_enter_timewait(cm_id_priv); |
| return PTR_ERR(msg); |
| } |
| |
| 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_priv_msg(msg); |
| return ret; |
| } |
| |
| cm_id_priv->id.state = IB_CM_DREQ_SENT; |
| 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); |
| |
| msg = cm_alloc_msg(cm_id_priv); |
| if (IS_ERR(msg)) |
| return PTR_ERR(msg); |
| |
| 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_response_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->counters[CM_RECV_DUPLICATES] |
| [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->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->msg); |
| break; |
| case IB_CM_MRA_REP_RCVD: |
| break; |
| case IB_CM_TIMEWAIT: |
| atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] |
| [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_response_msg(msg); |
| goto deref; |
| case IB_CM_DREQ_RCVD: |
| atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] |
| [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->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); |
| msg = cm_alloc_msg(cm_id_priv); |
| if (IS_ERR(msg)) |
| return PTR_ERR(msg); |
| 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); |
| msg = cm_alloc_msg(cm_id_priv); |
| if (IS_ERR(msg)) |
| return PTR_ERR(msg); |
| 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); |
| |